CUTTING HEAD FOR A HAIR AND HAIR CUTTING APPLIANCE AND A HAIR AND HAIR CUTTING APPLIANCE

专利摘要:
the present disclosure relates to a hair and hair trimming apparatus (10), particularly an electrically operated hair and hair trimming apparatus (10), and to a cutting head (18) for an apparatus for hair and hair cutting. hair (10), the cutting head (18) comprising a blade assembly (20) comprising a stationary blade (36) and a cutting blade (38), the stationary blade (36) and the blade cutters (38) comprise at least one toothed leading edge (22, 24) defined together by the respective teeth (62, 64) of the stationary blade (36) and the cutting blade (38), the teeth (62, 64) of the stationary blade (36) and the cutting blade (38) basically extend in a longitudinal direction (x), the stationary blade (36) further comprising a front face (58), particularly at the teeth (62) of the same, with the front face (58) facing a user's skin, when in operation, and a protector. or the skin (76) coupled to a housing portion (32) of the cutting head (18), the skin shield (76) at least partially covering the anterior face (58), the skin shield ( 76) is arranged to come into contact with the skin, when in operation, the skin protector (76) being mobile, in response to external forces applied to it, between a first state and a second state with respect to the set of blade (20), the skin protector (76) being disposed in a forward position in the first state and the skin protector (76) being disposed in a retracted position in the second state.
公开号:BR112017016529B1
申请号:R112017016529-5
申请日:2016-01-29
公开日:2021-07-06
发明作者:Kin Fatt Phoon；Roel Alexander Rethmeier
申请人:Koninklijke Philips N.V.；
IPC主号:

专利说明:

FIELD OF THE INVENTION
[001] The present invention relates to a shaving head for an apparatus for trimming hair and hair, particularly an electrically operated body hair or head hair trimming apparatus, wherein the shaving head comprises a set of blades including a stationary blade and a cutting blade, the stationary blade and the cutting blade comprising at least one toothed leading edge defined jointly by the respective teeth of the stationary blade and the cutting blade, and wherein the cutting blade may be reciprocally moved with respect to the stationary blade to cut hair or hair. The present disclosure further relates to an apparatus for trimming hair, particularly an electrically operated head or body hair trimmer, which is provided with a respective trimmer head. BACKGROUND OF THE INVENTION
[002] Appliances for clipping hair are generally known and may include hair clippers, hair clippers and appliances for shaving and depilation. Electric hair trimming devices can be powered by electricity from a power source and/or by batteries. Hair trimming devices are generally used to trim facial hair and hair to enable an individual to look well groomed. For this purpose, single-purpose hair clippers are well known, for example razors and hair clippers.
[003] In this regard, document US 3,149,418 A discloses an adjustable comb and measure accessory for a hair and hair trimmer of the type having a plurality of fixed, spaced, parallel blades and a plurality of movable blades cooperating with said fixed blades, said attachment having a flat element having at least the width of the entire plurality of blades of said trimmer, said flat element having a lug at a first end thereof for engagement with the most posterior ends. of said fixed blades, said flat element having a plurality of fixed teeth attached parallel to a second end of said flat element, said teeth being thus oriented so as to be parallel to said fixed blades of said trimmer of hair and hair when said attachment is attached to said hair trimmer, each of said teeth having an integral vertical portion attached thereto, each of said teeth having an integral vertical portion attached to it. the integral portions have a resilient material attached thereto along a vertical edge, facing said blades when said fastening is secured to said trimmer, whereby the front ends of said fixed blades can engage said resilient material at points spaced apart from the along said vertical portions to allow said flat element and said teeth to be spaced apart at varying distances from said blades.
[004] It should be understood that patent application WO2007/132385 A1 discloses a comb device for use with a hair and hair trimming system. The comb as described in WO2007/132385 A1 comprises a first part in a fixed position with respect to the cutting blades during use of the device; and a second part which is movable with respect to the cutting blades during use of the device. The first part of the comb device according to WO2007/132385 A1 ensures a constant cutting length, while the second part of the comb device improves the usability of the comb device.
[005] It should also be noted that the US patent document 2,013,279 discloses a hair trimmer that is arranged to move depending on the force used by the user to press the hair trimmer arrangement against the skin during use. of the device. The attachment moves relative to the hair and hair trimmer device's cutting board so that the cutting length of the device is changed.
[006] Additionally, in recent years, there has been an increasing demand for so-called body hair trimming devices. Body hair trimming devices or body hair trimming devices may be called special purpose hair trimming devices which can be used to remove, trim or cut body hair in regions of the body that do not include the neck, the user's face or head. In other words, body hair trimmers can also be called shaving and/or body hair trimmers. Body hair trimmers should therefore be particularly suitable for hair trimming operations on the wearer's sensitive skin areas, eg on the genital areas (intimate haircut), on hard-to-reach areas etc. Other applications of body hair trimmers can be leg and/or armpit waxing. However, the foregoing is not to be understood in a limiting way, therefore the present disclosure also relates to hair and hair trimming apparatus which are primarily arranged for cutting or trimming facial hair. Body hair trimmers are to some extent also suitable for trimming facial hair, although standard trimmers/hair clippers are also to some extent applicable for trimming body hair.
[007] For most hair cutting and/or trimming operations that use devices, it is of great interest to protect vulnerable regions of the skin to achieve acceptance by the user. It has been observed that the user's skin in various regions of the body is particularly sensitive to treatments with conventional razors and hair removal machines and trimmers. Therefore, the use of commercially available shaving or shaving appliances for hair trimming can cause significant irritation to the skin in these sensitive areas.
[008] Furthermore, it was observed that the cutting performance depends, to some extent, on the softness of a region of the skin treated at the time. For example, when removing hair from relatively hard areas of skin that are easily accessible, some users typically tend to speed up the cutting movement to quickly finish the cutting operation. On the other hand, when removing hair from relatively soft areas of skin that may be more difficult to access, a user typically tends to slow down the cutting movement of the appliance to avoid injuring the skin. There is a need for hair clippers which show sufficient performance in both types of application and which support the user to cut and/or trim the hair in a safe way.
[009] Consequently, there is still room for improvement in hair trimming devices. BRIEF DESCRIPTION OF THE INVENTION
[010] It is therefore an object of the present invention to provide a cutting head for an apparatus for hair trimming, particularly for an electrically operated hair trimmer apparatus, which can address some of the above mentioned drawbacks and issues. In particular, it is an object of the present disclosure to provide a shaving head that is particularly suitable for haircutting and/or hair removal in sensitive areas of the skin and, at the same time, for efficient and powerful cutting and/or cutting operations. removal of hair from areas of the skin that are not so sensitive. It would be additionally advantageous to provide a shaving head that reduces the risk of skin irritation when cutting hair from sensitive areas of the skin. Preferably, the risk of skin damage and/or even cuts to the skin can be significantly reduced. It is further preferred that the cutter head can be configured for trimming applications in sensitive skin regions in a low cost manner without adversely affecting overall cutting performance. It is another object of the present disclosure to provide a hair trimming apparatus, particularly a hair trimming apparatus, which is provided with a respective cutting head.
[011] In a first aspect of the present disclosure, a cutting head for an apparatus for cutting hair, particularly for an electrically operated hair clipper apparatus, is presented, wherein the cutting head comprises: - a set of blades comprising a stationary blade and a cutting blade, the stationary blade and the cutting blade comprising at least one toothed leading edge defined together by the respective teeth of the stationary blade and the cutting blade, the teeth of the stationary blade and the cutting blade. of the cutting blade extend basically in a longitudinal direction, the stationary blade additionally comprising a front face, particularly on the teeth thereof, the front face being disposed on the face of a user's skin, during operation, and - a skin protector coupled to a housing portion of the cutting head, the skin protector at least partially covering the front face, where q that the skin protector comprises a main body,
[012] being that the skin protector is willing to come into contact with the skin, when in operation,
[013] where the skin protector is mobile, in response to external forces applied to it, between a first state and a second state with respect to the blade assembly,
[014] where the skin protector is arranged in a forward position in the first state, and
[015] where the skin protector is arranged in a retracted position in the second state, and
[016] where the main body of the skin protector is inclined with respect to the front face of the stationary blade when the skin protector is positioned in the first state.
[017] The above aspect is based on the perception that the user's skin typically exhibits different characteristics. Particularly, relatively soft skin patches and relatively hard skin patches can occur. Soft skin patches or soft tissue patches thereof may tend to form bumps or domes when the hair clipper comes into contact with them. As a result, the soft skin portions can, in some cases, be engaged by the toothed leading edge of the appliance. Therefore, this can cause skin damage and/or irritation. As a precaution, razors or hair removal devices can be equipped with skin protectors that can also be called a comb or skin guard. A shaving head that is provided with the skin shield may come into contact with the skin to be treated with the skin shield in order to prepare the skin for the next cutting operation. Normally, when the blade assembly is moved along the skin, so-called protrusions of skin can be formed which, most likely, can enter the cut zone of the blade assembly. The more sensitive and soft the skin, the greater the risk of bulging or lifting of the skin. As a consequence, the skin protector can be used to even out the skin so as to prevent, or at least reduce, the formation of skin bulges and/or domes in the skin, or to space the skin from the cut area. Consequently, the risk of skin irritations can be significantly reduced.
[018] However, regions of the skin that are relatively hard and/or relatively impermeable may also typically be present. In these regions of the skin, cutting performance can be further improved if no skin protector is disposed between the blade assembly and the skin to be processed. In conventional haircuts or haircuts, this would basically require a separation of the skin protector. As a consequence, on a case-by-case basis, the user would have to selectively attach and/or detach the skin protector in order to obtain the desired cutting performance or skin protection.
[019] According to the above aspect, the skin protection and cutting performance requirements are both satisfied, as the skin protector is capable of self-adjustment. In other words, the skin protector can be called a self-adjusting skin protector or, more particularly, as a continuously or linearly self-adjusting skin protector. In other words, the skin protector itself can be automatically set to the desired state or setting by external forces applied to it, which can be attributed to a user's contact force and/or a current degree of softness. of the skin. Typically, the user applies a certain contact force to the hair or hair clipper when cutting and/or trimming the hair or hair. Additionally, when processing relatively hard regions of the skin, the user is most likely to apply a greater contact force to sufficiently propel the cutting head into contact with the portion of skin to be processed. On the other hand, when processing relatively soft skin patches, the user typically applies lesser contact forces to the hair or hair trimmer in order to avoid skin irritation and/or skin damage. Consequently, the skin protector can be operated in dependence on the level of a contact force that is applied to the hair or hair clipper.
[020] The first state of the skin protector is particularly suitable for processing relatively soft skin patches. The second stage of the skin protector is particularly suitable for processing relatively hard skin patches. In the first state, a larger portion of the blade assembly, particularly the at least one serrated anterior edge, is covered or protected by the skin shield. In the second state, a larger portion of the blade assembly, particularly the at least one serrated leading edge, than in the first state, is exposed. Consequently, it is more likely in the second state that the front face of the stationary blade actually makes contact with the skin than in the first state. On the one hand, this can improve cutting performance when operating on relatively solid skin patches. On the other hand, in the first state, the risk of skin damage can be significantly reduced.
[021] It is worth noting in this connection that a system formed by the skin shield and the isolated movement mechanism can form an independent aspect separate from the present disclosure. The skin guard and movement mechanism can form a system that can be attached to a shaving head and provide the shaving head with improved skin protection characteristics. Consequently, a shaving head which is provided with a respective skin protector is particularly suitable for hair trimming and/or shaving or waxing operations.
[022] Furthermore, at least in the first state, the skin protector can act as a guide for the hair to be cut. In general, the skin protector may comprise a plurality of guide teeth or guide tabs which are aligned with a general orientation of the teeth of the stationary blade. Consequently, hairs can be guided to the stationary blade and cut in a cutting operation similar to scissors cutting after reciprocating the movement of the cutting blade in relation to the stationary blade.
[023] In general, the skin protector can be called the skin protection comb. That is, in respective embodiments, the skin protector comprises a plurality of teeth that are aligned with the teeth of the blade assembly. However, alternative skin protector modalities that do not use the respective guide teeth can also be envisaged. Such a device may be called a skin protection bar or skin protection plate.
[024] As noted above, the skin protector is moved or adjusted in response to external forces applied to it. As a result, the skin protector can also assume intermediate states or intermediate positions between the first state and the second state. Therefore, the first state can be thought of as a cutting head state in which no external forces or considerably low external forces are applied to the skin shield. Consequently, the second state of the skin shield can be called a state in which considerably large external forces are applied to the skin shield. As a result, the user can control the skin protector by adjusting or varying the actual contact force applied through the hair or hair trimmer that pushes the shaving head of the hair or hair trimmer against the skin region to be processed.
[025] In an exemplary embodiment, the cutting head additionally comprises a movement mechanism that is positioned between the skin shield and the housing portion, the movement mechanism movably connecting the housing portion and the skin protector. As a result, the skin protector is secured to the housing portion in a movable or adjustable manner. The movement mechanism ensures definite movement of the skin protector between the first state and the second state. In other words, the movement mechanism can be arranged to transfer or convert an actuating force into a respective response, i.e. a respective fit of the skin protector.
[026] In a further refinement of this modality, the movement mechanism comprises at least one displacement guide element that is preferably disposed at a side end of the skin protector, where the at least one guide element is disposed in a slot guide that is provided in the housing portion, the guide slot defining an allowable direction of linear movement for the displacement guide element with respect to the housing portion. By way of example, the at least one guide element may be arranged as a laterally projecting pin or tab engaging a respective guide slot.
[027] Preferably, the movement mechanism comprises two respective displacement guide elements that are arranged at opposite side ends of the skin shield, the displacement guide elements securing the skin shield to the cutting head in a manner that prevents let it go. The displacement guide elements can engage their respective guide slots in a positive locking mode. As a result, whilst being adjustable and/or movable with respect to the housing portion of the cutting head, the skin shield can be securely retained in the housing portion.
[028] In yet another refinement of the cutting head, the movement mechanism additionally comprises at least one guide element that is preferably arranged adjacent to the at least one displacement guide element, the at least an orientation guide element is received in a guide block which is provided in the housing portion which defines a first orientation of the skin protector in the first state, and a second orientation of the skin protector in the second state. Preferably, the orienting guide element is arranged to define not only a first orientation and a second orientation of the skin protector, but also a first position in the first state and a second position in the second state of the skin protector.
[029] In a further refinement, two respective guiding guide elements are used that are arranged at opposite lateral ends of the skin protector. The at least one orienting guide element defines respective end positions and/or end orientations of the skin protector in the first state and second state, respectively.
[030] In a further refinement of the movement mechanism, the guide block defines a first boundary surface that contacts a first contact surface of the guide element in the first state, the guide block defining a second boundary surface that contacts a second contact surface of the guide element in the second state. In some embodiments, the guide element protrudes from a main body of the skin protector, preferably in a lateral direction. Consequently, the guide blocks can be arranged as a recess extending laterally in the housing portion. On the other hand, in alternative embodiments, the guide element may be disposed as a recess extending laterally in the skin protector, while the guide block is disposed as a bulge of the laterally extending housing portion.
[031] It goes without saying that, in some embodiments, at least the guiding element or the guiding block can implement or can be composed of two separate entities (elements). In this case, one of the entities sets the skin shield orientation in the first state and the other sets the skin shield orientation in the second state. Consequently, the first boundary surface, the second boundary surface and/or the first contact surface or the second contact surface would be assigned a respective distinct entity.
[032] Preferably, the first boundary surface and the first contact surface, as well as the second boundary surface and the second contact surface, cooperate with each other in such a way that the respective orientation of the skin protector is defined in at least two directions in space when the respective elements engage with each other.
[033] In yet another exemplary embodiment, the skin shield is movably disposed on the cutting head so that the skin shield, when moving between the first state and the second state, is pivoted and displaced relative to the assembly of blade in a combined movement. Consequently, according to this modality, when moving between the first forward position and the second retracted position, the skin protector is not only moved linearly, but is also pivoted. A respective combined movement includes a rotation (rotary) component and a linear displacement component. This can have the advantage that the skin protector can be even better adapted to its defined function in the first state and second state, respectively. The main body of the skin protector is at least slightly inclined with respect to the front face of the stationary blade in the first state.
[034] In the second state, the main body of the skin protector can be positioned with respect to the front page of the stationary blade in a substantially flat way or in a parallel way. This can be achieved by rotating or articulating the skin shield while moving the skin shield between the first state and the second state. Furthermore, the respective tips of the skin protector, particularly the tips of its guide teeth, can be substantially aligned in the longitudinal direction with the respective tips of the teeth of the stationary blade. However, in the second stage of the skin protector, its tips can be displaced in relation to the tips of the teeth of the stationary blade in the longitudinal direction. Consequently, a larger portion of the teeth of the stationary blade is exposed in the second state. A respective longitudinal displacement of the skin shield can be achieved by (linear) displacement of the skin shield, but also by applying a combined movement of articulation/displacement of the skin shield.
[035] In yet another exemplary embodiment at least one limit stop is provided in the housing portion, the skin protector comprising a boundary element that comes into contact with the at least one stop in the first state. The at least one limit stop may be incorporated by or formed in the guide slot for the displacement guide element, if any, or in the guide block for the guide guide element.
[036] In yet another modality, the skin protector comes in contact (areolarly) with the stationary blade on its front face in the second state. Consequently, the stationary blade, particularly its front face, can define a respective limit stop for the skin protector in the second state.
[037] In yet another exemplary embodiment, the cutting head additionally comprises at least one tensioning element, particularly at least one spring element, which is arranged to urge the skin protector to the first state. Preferably, the movement mechanism is provided with at least one tensioning element. By way of example, the tensioning element can be incorporated by a compression spring, a tension spring, a helical spring, a spiral spring, etc. Preferably, two tensioning elements are provided which are arranged to contact the skin protector at its lateral ends, with a contact surface being disposed at or adjacent to the at least one guiding element. . The tensioning element may comprise defined stiffness characteristics that define the force that needs to be applied to the skin shield to move the skin shield between the first state and the second state.
[038] In another refinement of the cutting head, the at least one tensioning element generates a linear propulsion component and a rotating component that propels the skin protector to the first state. As a consequence, a single type of resilient element may be sufficient to induce the combined movement of the skin protector. This can have the advantage that the movement mechanism, as such, can be composed of a few components. Preferably, as the respective connecting portions can be formed integrally with the skin protector as such and the housing portion as such, only very few additional components are needed to implement the movable skin protector. Preferably, only skin shield as such and one or two tensioning elements form additional parts to implement the self-adjusting skin shield on the cutting head.
[039] As indicated above, it may be preferable, in some embodiments, that at least the skin shield position or orientation with respect to the blade assembly is changed when the skin shield is moved between the first state and the second state .
[040] In yet another embodiment of the cutting head, the at least one toothed leading edge of the stationary blade and a corresponding leading edge of the skin shield maintain a substantially parallel relative orientation when the skin shield is moved between the first state and the second state. Preferably, the jagged leading edge of the stationary blade and the leading edge of the skin shield are brought into alignment in the first state. In the second state, the leading edges can be spaced apart in a parallel way.
[041] In yet another embodiment of the shaving head, the skin shield is transferred from the first state to the second state by applying a contact force to the hair or hair shaving apparatus when the shaving head is moved along the skin. Consequently, an opposing force may be present between the skin and the skin protector, which is dependent on the level of applied contact force. As indicated above, the user typically varies, and may be prompted to adjust, the level of contact force to a degree of skin softness perceived at the time.
[042] In yet another exemplary modality, the skin protector is arranged, in the first state, to prevent soft convex portions of the skin from contacting the cutting edges of the teeth of the stationary blade and the cutting blade. the skin shield is arranged, in the second state, to expose a larger portion of the front face of the stationary blade to increase cutting performance.
[043] In yet another embodiment, the skin protector comprises a plurality of guide teeth that are adapted to the teeth of the stationary blade, the guide teeth extending from a main body that extends along the lateral extension of the blade set. The main body can also be called support plate, support part, support bar, etc. In general, the guide teeth of the skin guard and the teeth of the stationary blade can assume at least a similar orientation with respect to each other. This can particularly apply when viewed from the top plane, ie when the projection plane is parallel to the longitudinal direction and the lateral direction. On the other hand, when viewed from the side, that is, when the projection plane is parallel to the longitudinal direction and the vertical direction, at least in one of the first and second states, the guide teeth of the skin protector can be used to less slightly inclined with respect to the teeth of the stationary blade.
[044] In another modality of the cutting head, the number of teeth on the stationary blade is equal to or greater than the number of guide teeth on the skin guard, with a ratio between the number of teeth on the stationary blade and the number of guide teeth on the skin protector is preferably an integer. In other words, the ratio can be in whole numbers, eg 1:1, 2:1, 3:1, 4:1 etc.
[045] As a consequence, not necessarily each tooth of the stationary blade needs to be assigned a respective flap of the skin protector. However, in each case, each guide tine can be aligned with a respective tine. If, for example, the above ratio is 2:1, the spaces between the guide teeth of the skin protector can be assigned and aligned with two spacing slits and a tooth disposed between them on the stationary blade.
[046] In yet another embodiment, the blade assembly, particularly its stationary blade, is coupled to the housing portion in a non-hinged manner. As a consequence, typically no change of position and/or orientation of the blade assembly (particularly its stationary blade) with respect to the housing portion typically occurs when the skin shield is moved between the first state and the second state.
[047] In yet another embodiment, the skin protector is coupled to the housing portion in a detachable manner. This may involve the skin shield being deliberately detached from the shaving head. By way of example, the displacement guide elements that can be arranged at the lateral ends of the skin protector can be deflectable so that they can be pulled out of engagement with their guide slots, so that finally the skin protector can be removed from the cutting head. This can further facilitate precise cutting and/or trimming operations, particularly operations in which hairstyles are made.
[048] In yet another exemplary embodiment, the skin shield is arranged as a skin shield accessory that is releasably attachable to the cutting head, with the skin shield preferably being an integrally formed part made of material resilient, particularly of plastic material. By way of example, the stationary blade and the cutting blade may be at least partially formed of metallic material, particularly of laminar metallic material. As the skin protector is not directly involved in the cutting operation, softer materials such as plastic material can be used. This can have another advantage that the thermal conductivity of the skin shield is relatively low. Consequently, the heat that can be generated in the course of the cutting operation between the cutting blade and the stationary blade basically cannot considerably heat the skin protector.
[049] The above modality can be further developed by the fact that the skin protector comprises at least one snap-on element that is adapted to a corresponding coupling portion of a housing portion of the cutting head. Consequently, the attachment and/or removal of the skin protector can be further facilitated. It can also be conceived that the cutting head can be provided with more than one skin protector, and the respective skin protectors may differ in the number and shape of their guide teeth, for example.
[050] In yet another embodiment, the cutting head blade assembly comprises two front edges that are preferably arranged spaced apart in an oppositely parallel manner. In addition, the skin shield, particularly its main body, may be shaped such that one of the two anterior edges is completely covered by the skin shield.
[051] Therefore, the set of blades can be called a double-sided blade set, with the stationary blade and the cutting blade defining a first serrated leading edge and a second serrated leading edge that faces to the side. opposite the first leading edge, the first serrated leading edge and the second serrated leading edge being longitudinally spaced apart, and the skin protector comprising a first array of guide teeth associated with the first serrated leading edge and a second arrangement of guide teeth associated with the second toothed leading edge.
[052] The double-sided arrangement can have the advantage that more regions of the body can be reached with the shaving head when the shaving head is attached to a hair trimming apparatus comprising a basically elongated but at least slightly elongated housing curved. In addition, the user can push and drag the appliance for hair trimming, in any case a toothed leading edge of the two toothed leading edges can cut hairs. Consequently, both the push phase and the drag phase of a course can be used to cut hair, reducing idle motion. The cutting performance can thus be increased.
[053] According to another aspect of the present disclosure, a hair trimmer, particularly an electrically operated hair trimmer, is disclosed, wherein the hair trimmer comprises a shaving head and a skin protector. according to at least some of the modalities disclosed here. In general, the hair trimmer can be considered a hair trimmer equipped with an electric motor. Consequently, a motor can be provided to drive the set of blades. Generally, the cutting blade, which may also be called the movable blade, is mobile relative to the stationary blade. The cutting blade can be driven relative to the stationary blade, particularly in an oscillating or reciprocating manner.
[054] In general, the haircutting apparatus may comprise an elongated housing which may be at least slightly curved. The housing may further comprise a first end and a second end which is opposite the first end. At the first end of the housing, a cutting head can be arranged to which the skin protector can be attached. The second end of the housing of the hair trimmer may also be called the cable end. The hair trimmer may also be called a hair clipper or hair clipper. BRIEF DESCRIPTION OF THE FIGURES
[055] These and other aspects of the invention will become evident and will be elucidated with reference to the embodiments described below. In the following figures:
[056] Figure 1 shows a schematic perspective view of an exemplary embodiment of an apparatus for cutting electric hair, particularly an electrically operated hair trimmer apparatus;
[057] Figure 2 shows a perspective view of a set of blades of an apparatus for cutting hair that can be driven by a drive mechanism;
[058] Figure 3 shows a longitudinal side view of the set of blades according to Figure 2;
[059] Figure 4 shows a side view in partial cross section of a set of blades according to Figures 2 and 3 along the line IV-IV in Figure 3;
[060] Figure 5 shows a perspective view of a stationary blade and a cutting blade of the set of blades, with the stationary blade and the cutting blade shown in an exploded state;
[061] Figure 6 shows a perspective view of a modality of a cutting head for a fur cutting apparatus, with the cutting head provided with a skin protector, and the skin protector is shown in a first state;
[062] Figure 7 shows another view of the arrangement of the cutting head illustrated in Figure 6, with the skin protector shown in a detached state;
[063] Figure 8 shows a side side view in partial cross section of a central region of the cutting head arrangement illustrated in Figure 6, with the skin protector shown in a first state;
[064] Figure 9 shows another side cross-sectional view of the arrangement illustrated in Figure 8, with the skin protector shown in a second state;
[065] Figure 10 shows another side side view in partial cross section of a side end region of the cutting head arrangement illustrated in Figure 6, the skin protector being shown in the first state;
[066] Figure 11 shows another cross-sectional side view of the arrangement illustrated in Figure 10, with the skin protector shown in the second state;
[067] Figure 12 shows a side side view in cross-section in perspective of a side end region of the cutting head arrangement illustrated in Figure 6, with the skin protector shown in the first state;
[068] Figure 13 shows another side view in cross-section in perspective of the arrangement illustrated in Figure 12, with the skin protector shown in the second state;
[069] Figure 14 is a longitudinal side view in cross-section in partial perspective of a side end region of the cutting head arrangement illustrated in Figure 6, with the skin protector shown in the first state;
[070] Figure 15 is another longitudinal side view in cross-section in partial perspective of the arrangement illustrated in Figure 14, with the skin protector shown in the second state;
[071] Figure 16 is a top perspective view of a side end region of a cutting head housing portion illustrated in Figure 6, the blade assembly and skin shield not being shown for purposes of illustration; and
[072] Figure 17 is another top perspective view of the housing portion shown in Figure 16, the view orientation of Figure 17 being slightly different from the view orientation of Figure 16. DETAILED DESCRIPTION OF THE INVENTION
[073] Figure 1 schematically illustrates, in a simplified perspective view, an exemplary embodiment of an apparatus for cutting hair 10, particularly a hair trimmer apparatus 10. The apparatus for cutting hair 10 may be primarily intended for cutting facial hair and/or head hair. Alternatively, the haircutting apparatus 10 may be suitable for cutting hair in sensitive regions of the body, such as intimate regions, genital regions, armpit regions, etc. However, cutting and/or trimming facial hair and/or hair can also be provided for such apparatus, and vice versa.
[074] Hair-cutting apparatus 10 comprises an elongated housing 12. Housing 12 comprises a first end and a second end that is opposite the first end. The second end of housing 12 may also be called the cable end. In general, housing 12 may comprise a portion of cable 14 on which a user can secure housing 12. In general, housing 12 may be formed in a tubular or shaft-like manner. In addition, housing 12 may be at least slightly curved or banana-shaped in its elongated longitudinal extent.
[075] Housing 12 may additionally comprise controls 16, eg on/off buttons etc. At the first end of housing 12, a cutting head 18 can be provided. The first end of housing 12 may therefore also be called the neck portion. As indicated in Figure 1, the cutting head 18 may comprise a blade assembly 20. The blade assembly 20 may define at least one serrated leading edge 22, 24. In Figure 1, the blade assembly 20 defines a first leading edge toothed 22 and a second toothed leading edge 24 that faces away from the first toothed leading edge 22.
[076] For the purpose of haircutting, a user may hold the housing 12 of the haircutting apparatus 10 on the handle portion 14 and move the shaving head 18 through the hair in a direction of movement indicated by reference numeral 28 An ideal direction of movement 28 may generally be perpendicular to a lateral direction (indicated by reference numeral 30) which may also be called the direction of cutting movement of the blade assembly 20. A housing portion of the blade head section 18 is indicated in Figure 1 by reference numeral 32. In addition, a dashed line indicated by reference numeral 34 illustrates a clamping interface 34 where the cutting head 18 can be secured to the housing 12. In some embodiments, the cutter head 18 can be releasably attached to housing 12. However, in alternative embodiments, cutter head 18 can be permanently secured to housing 12. Consequently, in these embodiments, ne no clamping interface 34 needs to be provided.
[077] In Figure 1, a main direction of the longitudinal/elongated extension of the housing 12 is indicated by the reference number 26. The housing 12 can be at least slightly inclined and/or curved. As a result, the cutting head 18 and the blade assembly 20 can be at least slightly inclined with respect to a plane that is perpendicular to the direction of elongation 26. Taking into account that the blade assembly 20 can define a toothed first leading edge 22 and a second toothed leading edge 24, the user or operator of the hair trimming apparatus 10 may then operate the hair trimming apparatus 10 in at least two distinct operating orientations. This can further make it possible to reach remote and hard-to-reach areas of the skin.
[078] The housing 12 can also house a drive mechanism for the set of blades 20. The drive mechanism (not shown in Figure 1) may comprise an electric motor and a power transmission unit that can couple the motor and the blade assembly 20. Additionally, an internal control unit can be provided. The hair trimming apparatus 10 can be battery powered and/or powered by an electrical power source. Consequently, in at least some embodiments, housing 12 can still house a battery unit. Preferably, the hair trimming apparatus 10 is designed in a waterproof manner. This may include that the user can operate the hair trimmer in a primarily wet or damp environment, for example, in a bathtub or shower.
[079] For ease of reference, coordinate systems are indicated on several drawings in this document. As an example, a Cartesian coordinate system (clockwise) XYZ is shown in Figure 2. An X axis of the respective coordinate system extends in a generally longitudinal direction that is generally associated with length, for the purposes of this revelation. A coordinate system Y axis extends in a height (or vertical) direction that can be considered for illustrative purposes only, at least in some embodiments, as a generally vertical direction. A Z axis of the respective coordinate system extends in a lateral (or transverse) direction generally associated with width, for the purposes of this disclosure. Of course, an association of the X-Y-Z coordinate system with features and/or modalities of the pile cutting apparatus 10 is provided primarily for illustrative purposes and will not be interpreted in a limiting way. It should be understood that those skilled in the art can readily convert and/or transfer the coordinate system provided herein by confronting alternative modalities, respective figures and illustrations which include different orientations. It is worth mentioning further that, for the purpose of the present disclosure, the X-Y-Z coordinate system is generally aligned with the main directions and orientations of the cutting head 18 which includes the blade assembly 20.
[080] In this regard, further reference is made to Figures 2 to 5. Figure 2 is a top perspective view of a set of blades 20 that can be implemented in the cutting head 18 illustrated in Figure 1. The set of blades 20 comprises a stationary blade 36 and a cutting blade 38 which can be moved relative to each other in a cutting direction 30 which is basically parallel to the lateral direction Z for cutting hair. Stationary blade 36 and cutter blade 38 are illustrated in Figure 5 in more detail in an exploded state.
[081] Reference is again made to Figures 2 and 3. The blade assembly 20 further comprises a frame 40 that can form a base for the stationary blade 36. The receiving frame 40 can comprise a support curvature or a support arm. support 44 which can be coupled to the housing portion 32 of the cutter head 18, see also Figure 6. The support arm 44 can, on the one hand, receive the stationary blade 36, directly or intermediately. Stationary blade 36 can be arranged to be secured to support arm 44. Consequently, no relative movement between support arm 44 and stationary blade 36 is desired during operation of blade assembly 20.
[082] As can best be seen from Figures 3 and 4, the cutting blade 38 can be disposed on the receiving frame 40. However, the cutting blade 38 can be received in a mobile manner, particularly in a mobile manner. slider. The cutting blade 38 can be moved relative to the stationary blade 36 in the cutting direction 30. To that end, the cutting blade 38 can be attached to a transmitter 46 which can be driven by a drive 48 of the drive mechanism. By way of example, actuator 48 may be arranged as a pivoting actuation lever that can be engaged with a pivot shaft 50 that can be secured or coupled to housing 12 (not shown in Figure 2). A pivotal movement of drive 48 around shaft 50 is indicated in Figure 2 by reference numeral 52. Consequently, an oscillating rotary movement of driver 48 can be transferred into reciprocating sliding motion of cutting blade 38 with respect to blade stationary 36. At an input end of the driver 48 that is opposite an input end that is coupled to the transmitter 46, a motor, particularly an eccentric portion of an output shaft thereof, can drive the driver 48. As how can best be seen in Figure 2, the actuator 48 can be at least slightly curved. As a result, the blade assembly 20 can be at least slightly inclined with respect to an orientation of an output shaft of a respective electric motor.
[083] Furthermore, at least one inclination element 42 can be disposed between the support arm 44 and the cutting blade 38. The inclination element 42, particularly a first and a second inclination element 42, can actually force cutter blade 38 to contact stationary blade 36 to improve cutting performance. In addition, the tilting element 42 can apply a reset force to the cutter blade 38 and additionally dampen or attenuate the movement of the cutter blade 38. This can have a positive impact on cutting performance and movement noise. of the blade set 20.
[084] At the side ends of the blade assembly 20, side connectors 56 connecting the support arm 44 and the stationary blade 36 may be provided. The toothed first leading edge 22 and the second toothed leading edge 24 of the blade assembly 20 may , in general, extend in the lateral Z direction. The first toothed leading edge 22 and the second toothed leading edge 24 may be spaced apart from each other in the longitudinal X direction.
[085] As best seen in Figure 4, the stationary blade 36 and the cutting blade 38 are stacked in the vertical direction or in the height direction Y. A front face of the stationary blade 36 is indicated in Figure 3 by the reference number 58. Front face 58 is the side or surface of stationary blade 36 that is normally facing the skin when blade assembly 20 is in operation. A rear face which normally faces away from the front face 58 is indicated in Figure 3 by reference numeral 60. The cutting blade 38 contacts the stationary blade 36 on the rear face 60 thereof.
[086] As can be further observed in Figure 4, respective portions of the stationary blade 36 that are associated with the first serrated leading edge 22 and with the second serrated leading edge 24 may be at least slightly slanted and/or curved. Thus, the front face 58 and the rear face 60 do not necessarily have to be perfectly parallel to each other and/or to a plane that is defined by the longitudinal direction X and the lateral direction Z. However, it can be assumed that the face front 58 and rear face 60 are substantially parallel to the aforementioned plane XZ.
[087] With specific reference to Figure 4 and Figure 5, an exemplary embodiment of the set of blades 20 is further detailed. The serrated leading edges 22, 24 of the blade assembly 20 may be formed by a series of teeth 62 of the stationary blade and a series of corresponding teeth 64 of the cutting blade. The teeth 62, 64 can basically extend in the X longitudinal direction. A row or series of teeth 62, 64 can basically extend in the Z lateral direction and form a corresponding leading edge 22, 24. Between the teeth 62, 64, respective gaps or tooth gaps can be provided. Hair may enter the slits and then be cut due to the relative movement of the cutting blade 38 relative to the stationary blade 36. The tooth 62 tips of the stationary blade 36 are indicated by reference numeral 66 in Figures 4 and 5. The tips of the teeth 64 of the cutting blade 38 are indicated in Figures 4 and 5 by the reference numeral 72. Both teeth 62 of the stationary blade 36 and the teeth 64 of the cutting blade 38 may comprise, at least on the lateral sides, facing cutting edges. to each other that can contact to cut hair with a scissors or clipping action when the cutting blade 38 is moved relative to the stationary blade 36.
[088] As can be seen further in Figures 4 and 5, the cutting blade 38 can comprise a U-shaped frame body forming a guide or sliding slot 68. At the ends of the U-shaped profile, toothed portions can be provided to form leading edges 22, 24 with the respective teeth 62 of the stationary blade 36. In general, the cutting blade 38 can be obtained from a sheet of metal that can be formed and processed properly.
[089] The stationary blade 36 can be composed of two portions that can be shaped and connected or glued together in a similar way to a bird's wing. Each of the components can finally form teeth 62 of one of the first serrated leading edge 22 and the second serrated leading edge 24, respectively. Each of the wing-shaped components can comprise a basic L-shaped section. Both components can be properly attached to one another, for example by gluing, welding etc. Accordingly, the stationary blade 36 may comprise a basic T-shaped profile which extends in the lateral direction Z. A rod of the T-shaped profile may define a guide support 70 which is arranged to cooperate with the guide or sliding slot. 68 of the cutting blade 38. In the assembled state, the guide bracket 70 can be inserted into the sliding slot 68. Accordingly, the stationary blade 36 can provide a guide projecting towards the cutting blade 38 that engages a corresponding slot thereof. . The cutting blade 38 can be moved relative to the stationary blade 36 reciprocally in the lateral direction Z. A guide support in the longitudinal direction X and in the vertical direction Y is provided by the stationary blade 36. The tilting elements 42 can bias the cutter blade 38 against the stationary blade 36 until it abuts against it. Consequently, the longitudinal and vertical position of the cutting blade 38 can be sufficiently defined.
[090] The exemplary modality of the blade assembly 20, as shown in Figures 1 to 5, implement two toothed anterior edges 22, 24. However, this should not be understood in a limiting sense. There may be alternative exemplary modalities that implement a single toothed leading edge.
[091] Additional reference is made to Figures 6 to 17. Figure 6 and Figure 7 illustrate a partial perspective view of an exemplary embodiment of a cutting head 18 that can be arranged according to the arrangement illustrated in Figures 2 to 5. Particularly, the cutter head 18 may utilize a blade assembly 20 and a receiving frame 40 which can be engaged by a drive mechanism 48, as already explained above.
[092] Figure 6 and Figure 7 basically illustrate a view of the cutting head 18 in the same orientation. In Figure 6, a skin shield 76 is attached to the cutting head 18, particularly to a housing or housing portion 32. The skin shield 76 is illustrated in a detached or released state in Figure 7 for illustrative purposes. In the embodiment(s) of Figures 6 to 17, as explained and discussed in this document, the blade assembly 20 of the cutter head 18 is disposed basically on the cutter head 18 in a non-hinged manner. In other words, according to this modality, the cutter head 18 does not provide a so-called contour-following capability. Instead, blade assembly 20, particularly stationary blade 38, can be secured or coupled to housing portion 32 in a relatively fixed manner.
[093] Skin protector 76 can be arranged as a single component (integral formed). The skin shield 76 may comprise a main body 78 which can basically extend by a lateral extension (extension in the Z direction) of the blade assembly 20. As shown in Figure 6, the skin shield 76, particularly its body main 78, may cover at least a portion of the stationary blade 36, particularly of its front face 58. The skin protector 76 may comprise a plurality of guide teeth 82 which may extend from the main body 78. Particularly, the teeth of guide teeth 82 can basically extend in the longitudinal direction X. In other words, guide teeth 82 can basically be aligned with teeth 62 of stationary blade 36, see also Figure 5. However, the number of teeth of guide 82 does not necessarily have to correspond to the number of teeth 62. In other words, the number of teeth 62 of the stationary blade 36 may be a multiple of the number of guide teeth 82. Therefore, for example, every second The third, fourth or fifth tooth 62 of the stationary blade 36 may be associated with a respective guide tooth 82 of the skin protector 76.
[094] When viewed in top view, at least in a first state, as shown in Figure 6, the position (lateral) or position of guide teeth 82 preferably corresponds to the position (lateral) or Z position of their respective associated teeth 62 on stationary blade 36. At the front end of housing portion 32, at least one receiving portion 86 may be provided, preferably two opposing receiving portions 86, which are arranged to receive and engage the skin protector 76. As best seen in Figure 7, the skin protector 76 may comprise, at the respective side ends 80 of the main body 78, at least one respective engagement portion 88 which is arranged to engage the receiving portion 86 of the portion. accommodation 32.
[095] In some embodiments, the skin shield 76 can be permanently attached to the housing portion 32. In other words, the skin shield 76 can be attached to the housing portion 32. This involves the fact that the user does not being able to deliberately remove or detach the skin shield 76 in a normal operating mode of the haircutting apparatus 10. However, in some alternative embodiments, the skin shield 76 may be releasably affixed to the housing portion 32. As a consequence , depending on an actual application type, the user can selectively attach the skin protector 76 to the housing portion 32 and hence to the cutter head 18. However, when the skin protection capabilities of a cutter head 18 respectively equipped are not useful, or are of little use, the user can remove the Skin Guard 76 for improved cutting performance.
[096] As the skin protector 76 is arranged as a movable and/or adjustable skin protector 76, the user can take advantage of the skin protector 76 in most application cases, as the skin protector 76 is self-adjusting to portions of relatively soft and relatively hard skin.
[097] Figures 8 to 17 illustrate an exemplary modality and additional aspects of the skin protector 76 and a respective movement mechanism 100 that allows the self-adjustment or self-configuration of the skin protector 76. Figure 8 and Figure 9 illustrate a respective lateral side view in cross section that is taken along line VIII-VIII indicated in Figure 6. Figure 10 and Figure 11 illustrate a respective lateral side view in cross section taken along line XX in Figure 6. Figure 12 and Figure 13 illustrate a respective perspective view of a lateral cross section taken along line XII-XII in Figure 6. Needless to say, the person skilled in the art notices that the positions of the respective cross sections indicated in the view in perspective of Figure 6 are basically parallel to a plane that is defined by the longitudinal direction X and the height or vertical direction Y, with reference also to the coordinate system X, Y, Z, in the Figure 7. However, as Figure 6 and Figure 7 illustrate a partial perspective view of the cutting head 18, also lines VIII-VIII, X-X and XII-XII are somewhat distorted due to the perspective view.
[098] The cross-sectional view of Figures 8 and 9 basically corresponds to the view of the blade assembly 20 illustrated in Figure 4. In Figure 8 and Figure 9, the blade assembly 20 and the skin protector 76 are attached to the portion housing 32 and shown in an assembled state. The skin protector 76 is shown in Figure 8 in a first state in a forward position. The skin protector 76 is shown in Figure 9 in a second state in a retracted position. In addition, the illustrations in Figures 10, 12 and 14 illustrate the first state. Accordingly, Figures 11, 13 and 15 illustrate the second state.
[099] Again, reference is made to Figure 8 and Figure 9. The main body 78 of the skin protector 76 comprises a front portion 92 and a leg portion 94 extending therefrom. In the second state, as shown in Figure 9, the front portion 92 is arranged basically parallel to the front face 58 of the stationary blade 36. On its rear or bottom side, the main body 78, particularly its front portion 92, comprises a rear surface 96. The rear surface 96 may contact the front face 58 in the second state. As can be further seen from Figure 9, the front portion 92 and leg portion 94 can fully cover one of the front edges 22, 24 in the second state.
[100] As noted above, a movement mechanism 100 is provided to move or operate the skin protector 76 between the first state and the second state. By applying force F to the skin protector 76, particularly by applying a force F acting in the vertical Z direction, to the main body 78 of the skin protector 76, the skin protector 76 can be urged into the second state. However, the actuating force F does not necessarily have to be perfectly parallel to the vertical direction Y. Typically, the actuating force F is indirectly caused by applying a contact force to the bristle cutting apparatus 10 to push the blade assembly 20 against the skin. A respective counterforce operates or actuates the self-adjusting skin protector 76.
[101] In some exemplary modalities, the skin protector 76 is not just displaced (linearly) or articulated when being transferred between the first state and the second state. Rather, as indicated in Figure 9 by the double arrows 102, 104, the movement of the skin protector 76 can be considered as a combined movement comprising a linear component (arrow 102) and a rotating component (arrow 104). To this end, movement mechanism 100 is provided which is arranged to define a range and path of movement for the skin protector 76.
[102] An exemplary embodiment of motion mechanism 100 will be elucidated from this point forward with reference to Figures 10 to 17. Needless to say, other alternative embodiments can be envisioned that may use only some aspects of that embodiment. In general, the movement mechanism 100 can be arranged as a coupling mechanism that defines the desired orientation of the skin protector 76 in the first state and the second state. Preferably, the movement mechanism 100 further defines respective intermediate positions of the skin protector 76 as it moves between the first state and the second state. By way of example, the movement mechanism 100 may be arranged as a link mechanism, particularly a four-bar mechanism. Alternatively, it may be sufficient for the movement mechanism 100 to provide respective contact surfaces or boundary surfaces that define the respective position and/or orientation of the skin protector 76 in the first and second states. When moving between the first and second states, it may be sufficient to define at least approximately one travel path. Consequently, to some extent, the displacement path can be indeterminate.
[103] The modality of movement mechanism 100 which is further illustrated in Figures 10 to 17 makes use of at least one guide guide element 110 which is disposed at a side end of the main body 78 of the skin protector 76. Preferably , two respective guide guide elements 110 are provided at two opposite side ends of the skin protector 76. Each guide guide elements 110 may be arranged to cooperate with a guide block 112 which is disposed in the housing portion. 32 of the cutter head 18. More generally, the guide block 112 can be directly or indirectly coupled to the stationary blade 36 of the blade assembly 20. Through the guide block 112, the skin shield 76 can assume defined positions ( in the first state and in the second state) with respect to the blade assembly 20.
[104] As shown in Figure 10 and Figure 11, the guide guide element 110 may extend from the main body 78 and may comprise a basically L-shaped or Z-shaped lateral cross-section. A first leg 114 it can extend from the main body 78, particularly perpendicular thereto. A second leg 116 may extend from the first leg 114, particularly perpendicular thereto or at a defined angle. Preferably, first leg 114 and second leg 116 are disposed at an angle to each other. Consequently, it is possible to precisely define a position and an orientation of the skin protector 76 in the first state and in the second state.
[105] As best seen in Figure 11, on guide block 112, a first boundary surface 120 can be provided, see also Figure 16. The first boundary surface 120 basically corresponds to a first contact surface 122 which is defined together by first leg 114 and second leg 116 of guide guide element 110. First boundary surface 120 and first contact surface 122 may engage to define the position and orientation of skin protector 76 in the first state. Furthermore, a second boundary surface 124 can be provided on the guide block 112. The second boundary surface 124 can basically correspond to a second contact surface 126 which is defined jointly by the first leg 114 of the guide element 110 and the rear surface 96 (or anterior portion 92) of skin protector 76 (see also Figure 8). Second boundary surface 124 and second contact surface 126 may engage to define the position and orientation of skin protector 76 in the second state.
[106] Furthermore, at least one tensioning element 130, preferably two tensioning elements 130, which are disposed at opposite side ends of the skin protector 76, can be provided. The at least one tensioning element 130 urges the skin protector 76 from the second state to the first state. By applying a respective actuating force F, the tensioning element 130 can be deformed. Consequently, a defined level of actuation force must be applied to the skin protector 76 to completely transfer the skin protector 76 from the first state to the second state. Various types of tensioning elements 130 can be envisaged. As can best be seen in Figures 10, 11, 14 and 15, the tensioning element can be arranged as a helical spring. The tensioning element 130 can contact the skin protector 76 in a load receiving portion 132 which can be disposed on the guide guide element 110. In addition, in the housing portion 32, a receiving support 134 can be provided. to receive the opposite end of the tensioning element 130, see also Figure 14, and Figure 15. In the event that no external actuating force F is applied to the skin protector 76, the tensioning member 130 ensures that the skin protector 76 is positioned and oriented in the first state. By way of example, the tensioning element 130 can be at least slightly tensioned or compressed in the first state. Consequently, the actuating force F applied to skin shield 70 must exceed a threshold to move skin shield 76.
[107] By adapting the characteristics and properties of the tensioning element 130, the response characteristics of the movement mechanism 100 to the skin protector 76 can be precisely defined.
[108] A further refinement of movement mechanism 100 is elucidated with further reference to Figures 12 and 13. In position adjacent to guide guide elements 110, at least one displacement guide element 140 can be provided. Guide guide elements 140 are provided extending laterally from guide guide elements 110 at the lateral ends of the skin protector 76. The guide guide elements 140 may be arranged in the form of pins. As can best be seen from Figures 12 and 13, the displacement guide elements 140 can be received, in the attached state of the skin protector 76, in respective guide slots 142. The guide slot 142 defines a displacement direction. to the displacement guide element 140 which is indicated by a double arrow 144 in Figure 12. The first state of the skin protector 76, as shown in Figure 12, corresponds to a top position of the displacement guide element 140 in the guide slot. 142. The second state of the skin protector 76 illustrated in Figure 13 corresponds to a lower or rear position of the displacement guide element 140 in the guide slot 142. In addition, the arrows 102, 104, which indicate components of the combined movement of the skin protector 76 in Figure 12, also refer to Figure 9 in this context.
[109] The combination of guide element 110 and guide block 112, as shown in Figures 10 and 11, and displacement guide element 140 and guide slot 142, shown in Figures 12 and 13, can be considered as a particularly beneficial modality. Together, the respective pairs of guide elements 110, 112 and 140, 142 precisely define the desired locations and orientations and the desired displacement trajectories of the skin protector 76.
[110] However, in order to avoid an overdetermined state of the movement mechanism 100, it may be additionally preferable to define the guide slot 142 so that the displacement guide element 140 does not contact a respective front or rear end thereof, when the guide guide element 110 comes into contact with the respective boundary surfaces 120, 124 in the first state and the second state, respectively.
[111] As best seen in Figures 14 and 15, the tensioning element 130 can engage the skin protector 76 with the guide guide element 110, which can provide the respective load-receiving portion 132. The load-receiving portion 132 it can therefore be displaced laterally from the displacement guide element 140.
[112] As can be further seen from Figures 14 and 15, the skin protector 76 can be secured or arranged so as to prevent it from coming loose in the housing portion 32. This can be achieved, for example, by the elements of displacement guide 140 which can be disposed in their opposite guide slots 142 in a positive locking mode. As a result, the skin protector 76 cannot be lifted or taken out of engagement with the housing portion 32.
[113] However, as further indicated above, the skin protector 76 may alternatively be arranged to be releasably secured to the housing portion 32. For example, the skin protector 76 can be deflectable or deformable enough that the displacement guide elements 140 can be deliberately and repeatedly taken out of engagement with the guide slots 142 such that ultimately, the skin protector 76 can be removed from the housing portion 32.
[114] Further reference is made to Figures 16 and 17 illustrating respective internal perspective views of housing portion 32, with blade assembly 20 and skin shield 76 removed for illustrative purposes. As already indicated in Figures 12 and 13, the housing portion 32 may comprise a first housing member 148 and a second housing member 150 which together may define the guide slot 142, for example. In alternative embodiments, the first housing component 148 and the second housing component 150 may together define the guide block 112, particularly the first boundary surface 120 and the second boundary surface 124. As can be further seen from Figures 16 and 17, guide block 112 and guide slot 142 may be disposed adjacent to each other in a laterally offset manner, with reference also to the laterally offset arrangement of guide guide element 110 and guide guide element 140, as illustrated in Figures 14 and 15.
[115] Although the invention has been illustrated and described in detail in the drawings and the above description, such illustration and description is to be considered illustrative or exemplary and not restrictive; the invention is not limited to the disclosed embodiments. Other variations of the disclosed embodiments can be understood and carried out by those skilled in the art in practicing the claimed invention in accordance with the appended claims.
[116] In the claims, the expression “comprising” does not exclude other elements or other steps, and the indefinite article “a” or “an” does not exclude a plurality. A single element or another unit can perform the functions of several items mentioned in the claims.
[117] No reference signs in the claims are to be construed as limiting the scope of the invention.

权利要求:
Claims (15)
[0001]
1. CUTTING HEAD (18) FOR A HAIR AND HAIR CUTTING APPARATUS (10), particularly an electrically operated hair and hair trimmer (10), the cutting head (18) comprising: - a set of blades (20) comprising a stationary blade (36) and a cutting blade (38), the stationary blade (36) and the cutting blade (38) comprising at least one toothed leading edge (22, 24) defined together by the respective teeth (62, 64) of the stationary blade (36) and the cutting blade (38), the teeth (62, 64) of the stationary blade (36) and that of the cutting blade (38) extending basically in a longitudinal direction (X), whereby the stationary blade (36) additionally comprises a front face (58), particularly on the teeth (62) thereof, the front face (58) being disposed on the face of a user's skin, during operation, and - a skin shield (76) coupled to a housing portion (32) of the cutting head (18), the foot shield 1e (76) at least partially covers the front face (58), the skin protector (76) comprising a main body (78), the skin protector (76) being arranged to come into contact with the skin when in operation, the skin protector (76) being mobile, in response to external forces applied to it, between a first state and a second state with respect to the blade assembly (20), with the skin protector (76 ) is disposed in a forward position in the first state, with the skin protector (76) being disposed in a retracted position in the second state, so that in the first state, a larger portion of the blade assembly is covered by the skin protector (76), compared to the second state, in which, in said second state, a larger portion of the blade assembly (76) is exposed compared to the first state, characterized by the main body (78) of the skin protector ( 76) be inclined with respect to the front face (58) of the stationary blade (36) when the pro Skin ceiling (76) is positioned in the first state.
[0002]
2. HEAD according to claim 1, characterized in that it additionally comprises a movement mechanism (100) which is positioned between the skin protector (76) and the housing portion (32), the movement mechanism (100) ) movably connects the housing portion (32) and the skin protector (76).
[0003]
3. HEAD according to claim 2, characterized in that the movement mechanism (100) comprises at least one displacement guide element (140) which is preferably arranged at a lateral end of the skin protector (76), and wherein the at least one displacement guide element (140) is disposed in a guide slot (142) provided in the housing portion (32) which defines an allowable direction of linear movement for the displacement guide element (140) as far as respect to the housing portion (32).
[0004]
4. HEAD according to claim 3, characterized in that the movement mechanism (100) comprises two respective displacement guide elements (140) which are arranged at opposite lateral ends (80) of the skin protector (76), and wherein the displacement guide elements (140) secure the skin protector (76) to the cutting head in a manner that prevents it from coming loose.
[0005]
5. HEAD according to any one of claims 3 to 4, characterized in that the movement mechanism (100) additionally comprises at least one guiding element (110) which is preferably arranged adjacent to the at least one element. displacement guide (140), the at least one guide guide element (110) being received in a guide block (112) which is provided in the housing portion (32) defining a first orientation of the skin protector (76 ) in the first state, and a second orientation of the skin protector (76) in the second state.
[0006]
6. HEAD according to claim 5, characterized in that the guide block (112) defines a first boundary surface (120) that comes into contact with a first contact surface (122) of the guide element (110) in the first state , and wherein the guide block (112) defines a second boundary surface (124) which contacts a second contact surface (126) of the guide guide element (110) in the second state.
[0007]
7. HEAD according to any one of claims 1 to 6, characterized in that the skin protector (76) is mobilely disposed on the cutting head (18) so that the skin protector (76) when moving between the first state and the second state are pivoted and displaced relative to the blade assembly (20) in a combined movement.
[0008]
8. HEAD according to any one of claims 1 to 7, characterized in that it additionally comprises at least one tensioning element (130), particularly at least one spring element, which is arranged to urge the skin protector (76 ) for the first state.
[0009]
9. HEAD according to claim 8, characterized in that at least one tensioning element (130) generates a linear propulsion component and a rotating component that impels the skin protector (76) to the first state.
[0010]
10. HEAD according to any one of claims 1 to 9, characterized in that, when moving between the first state and the second state, at least the position or orientation of the skin protector (76) with respect to the blade assembly (20) be changed.
[0011]
11. HEAD according to any one of claims 1 to 10, characterized in that, when moving between the first state and the second state, the at least one toothed leading edge (22, 24) of the stationary blade and a corresponding leading edge (84) of the skin protector (76) maintains a substantially parallel relative orientation.
[0012]
12. HEAD according to any one of claims 1 to 11, characterized in that the skin protector (76) is transferred from the first state to the second state by applying a contact force to the hair or hair trimmer (10) when the cutting head (18) is moved along the skin.
[0013]
13. HEAD according to any one of claims 1 to 12, characterized in that the skin protector (76) is, in the first state, arranged to prevent soft convex portions of the skin from coming into contact with the cut edges of the teeth (62 , 64) of the stationary blade (36) and the cutting blade (38), and the skin protector (76) being, in the second state, arranged to expose a larger portion of the front face (58) of the stationary blade ( 36) to increase cutting performance.
[0014]
HEAD according to any one of claims 1 to 13, characterized in that the skin protector (76) comprises a plurality of guide teeth (82) which are adapted to the teeth (62) of the stationary blade (36) guide teeth (82) extend from a main body (78) which extends the lateral extension of the blade assembly (20).
[0015]
15. APPARATUS FOR CUTTING HAIR AND HAIR (10), particularly an electrically operated hair and hair trimmer (10), characterized in that it comprises a shaving head (18) and a skin protector (76), as defined in any one of claims 1 to 14.

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BR112019011430A2|2019-10-15|spaced comb arrangement, shaving head and hair or haircutter

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JP2020516394A|2020-06-11|Attachment comb, cutting head and hair cutting device

---

JP5879531B2|2016-03-08|Electric razor

---

JP3211242U|2017-06-29|Clippers

---

US11247353B2|2022-02-15|Attachment comb and hair cutting appliance

---

CN210650779U|2020-06-02|Shaver head

---

BR112016003981B1|2021-09-14|HAIR TRIM DEVICE

同族专利:

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公开号 | 公开日

---

CN105835093A|2016-08-10|

---

CN105835093B|2019-10-08|

---

CN205735054U|2016-11-30|

---

JP6357282B2|2018-07-11|

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EP3253541A1|2017-12-13|

---

JP2018508257A|2018-03-29|

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US20180021965A1|2018-01-25|

---

WO2016124484A1|2016-08-11|

---

BR112017016529A2|2018-04-10|

---

RU2017130647A|2019-03-04|

---

EP3253541B1|2018-06-20|

---

US10391647B2|2019-08-27|

---

RU2700884C2|2019-09-23|

---

RU2017130647A3|2019-07-24|

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法律状态:
2020-02-18| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2021-04-20| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-07-06| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 29/01/2016, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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EP15153845|2015-02-04|

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EP15153845.1|2015-02-04|

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PCT/EP2016/051859|WO2016124484A1|2015-02-04|2016-01-29|Cutting head and hair cutting appliance|

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