• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    PERSONAL CARE DEVICE The present invention relates to a personal care device comprising a main cabinet, a hair cutting module that is displaceable in relation to the main cabinet against a spring force in a direction parallel to a main axis, and a sensor comprising a first sensor unit connected to the main cabinet and a second sensor unit connected to the hair cutting module, the sensor being configured to detect a displacement of the second sensor unit connected to the hair cutting module with respect to the first sensor unit connected to the main cabinet in a direction parallel to the main axis. The hair cutting module can be tilted in relation to the main cabinet around at least one tilt axis that extends perpendicular to the main axis. The first sensor unit is arranged in at least one first and second locations in relation to the main cabinet, and the second sensor unit is arranged in at least a third and fourth locations in relation to the hair cutting module, adjacent to , respectively, at the first and second locations seen in (...).
    公开号:BR112015008478B1
    申请号:R112015008478-8
    申请日:2014-10-27
    公开日:2020-11-03
    发明作者:Eddy Gerrit Veltman；Hedzer Durksz；Matthijs Jaap Wolter Ten Hove；Liesbet Hillechina Wind
    申请人:Koninklijke Philips N.V.；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [001] The invention relates to a personal care device comprising a main cabinet, a hair cutting module that is displaceable in relation to the main cabinet against a spring force in a direction parallel to a main axis, and a sensor comprising a first sensor unit connected to the main cabinet and a second sensor unit connected to the hair cutting module, said sensor being arranged and configured to measure an offset of the second sensor unit in relation to the first sensor unit in a direction parallel to the main axis. BACKGROUND OF THE INVENTION
    [002] Document US5983502A discloses an appliance for shaving or waxing with a main cabinet and three hair cutting units. Each hair cutting unit comprises an external hair cutting member with hair inlet openings and an internal hair cutting member, which is rotatable in relation to the external hair cutting member by means of a hair pin. coupling. The coupling pin is rotatable about a main axis and is axially movable against the spring force in a direction parallel to the main axis.
    [003] During shaving or waxing, a user will try to avoid skin irritation and skin damage as much as possible. Skin irritation and injury occur when the hair cutter comes into contact with the skin very intensively, which occurs particularly when the user presses the hair cutter against the skin with excessive force. This can occur when using shavers or wet shavers as well as electric shavers or dry shavers, and particularly when a user switches from one system to another or in the case of an inexperienced user. In the initial period of use, it is important that the user does not press the device for shaving or epilation against the skin with excessive force.
    [004] The shaving or waxing apparatus disclosed in US5983502A comprises a sensor means to warn the user when a given predefined force between the outer shaving member and the main cabinet is exceeded during shaving or waxing. The sensor comprises a permanent annular magnet, which is attached to the coupling pin, and a Hall sensor, which is disposed under the magnet and which is attached to the main cabinet.
    [005] There is a direct relationship between the force with which the cutting unit is pressed (spring force) in relation to the main cabinet and the distance between the magnet and the Hall sensor. The distance between the magnet and the sensor decreases as the cutting unit is further pressed. The Hall sensor is connected to an electronic circuit that has been adjusted in such a way that a warning signal is produced when a given distance, that is, pressure, is exceeded. The appliance for shaving or waxing can produce an optical or acoustic warning signal when the pressure exceeds a given value and thus warns the user to reduce the pressure in order to prevent or stop skin irritation and injury.
    [006] The movements of the coupling pin are limited to a rotational movement around the main axis and axial movement along the main axis. Due to the annular shape of the magnet, a part of the magnet will always be located opposite the Hall sensor, so that at each rotational position of the coupling pin and the internal hair cutting member connected to it, the distance between the Hall sensor and the annular magnet can be measured.
    [007] Other movements of the hair cutter in relation to the main cabinet cannot be detected by the sensor, since it would not be possible to deduce from the measured change in distance between the Hall sensor and the annular magnet if the change in distance it is due to an axial movement or, for example, a tilting movement around a tilting axis that extends perpendicular to the main axis. SUMMARY OF THE INVENTION
    [008] In view of the above, a general object of the present invention is to provide a personal care device of the type mentioned in the introductory paragraph, in which the axial displacement of the hair cutting module can be correctly measured.
    [009] In order to achieve this object, the invention provides a personal care device of the type mentioned in the introductory paragraph, which is further characterized by the fact that the hair cutting module is inclinable in relation to the main cabinet, against a spring force, around at least one tilting axis that extends perpendicular to the main axis, in which the first sensor unit is arranged in at least one first and second locations in relation to the main cabinet, and in which the second sensor unit is arranged in at least a third and fourth locations in relation to the hair cutting module, adjacent to, respectively, the first and second locations seen in directions parallel to the main axis, a distance between the first and the second locations being at least 25% of distance between the first and third locations, and while tilting the hair cutting module in relation to the main office, a change in distance between the first and third locations is different from a change in distance between the second and fourth locations.
    [010] Preferably, the third and fourth locations are opposite to the first and second locations, respectively, seen in directions parallel to the main axis.
    [011] When the hair cutting module is just being moved in a direction parallel to the main axis, the distance between each part of the first sensor unit and each part of the second sensor unit located opposite said part of the first sensor unit , and in particular the distances between the first and third locations and between the second and fourth locations will also decrease.
    [012] When the hair cutting module is just being tilted around the tilt axis, the distances between the first and third locations and between the second and fourth locations will change differently. Based on information obtained from the sensor units, for example information on the measured distances between the first and third locations and between the second and fourth locations and information on the mutual positions of the first, second, third and fourth locations, the angle Inclination of the hair cutting module in relation to the main cabinet can be calculated. Alternatively, it can be determined that the displacement of the hair cutting module is only an inclination displacement.
    [013] When the hair cutting module is being moved in a direction parallel to the main axis as well as being tilted around the tilt axis, it can be determined, from the information obtained from the sensor units, which part of the measured distances results from the axial displacement and which part of the measured distances results from the inclination displacement.
    [014] There is a direct relationship between the force with which the hair cutting module is pressed against a spring force in relation to the main cabinet and the axial displacement. From the measured displacements and known hardness properties of the spring member providing the spring force, the normal pressure force on the skin can be calculated. If the axial displacement is greater than a predetermined value, a warning signal will be produced indicating that the pressure force on the skin is too high.
    [015] The personal care device can be a shaving or shaving device, a trimmer, a beauty care device or other type of cutting device.
    [016] A distance must be present between the first and second locations, preferably greater than 25% of the distance between the first and third locations, so that the angle of inclination around the axis of inclination is determined with sufficient accuracy. The change in distance between a pair of adjacent or opposite locations in the first and second sensor units can be determined between as many pairs of adjacent or opposite locations as desired.
    [017] In another embodiment of a personal care device according to the invention, in relation to a plane that extends through the main axis and the inclination axis, the first and third locations are located on the first side of said plane while the second and fourth locations are partially located on said plane or on a second side of said plane.
    [018] When the hair cutting module is being tilted around the tilt axis, the distance between the first and third locations, cliffs located on the first side of said plane, will be reduced while the distance between the second and fourth locations , both located on the second side of said plan, will be increased, or vice versa. Based on the information obtained about the distance changes, the angle of inclination can be calculated and / or it can be deduced that the displacement of the hair cutting module is only an inclination displacement.
    [019] It is also possible that the second and fourth locations are located in said plan. In this case, the effect of a tilt shift will be that the distance between the second and fourth locations located on the plane will remain constant, while the distance between the first and third locations will increase or decrease.
    [020] In another embodiment of a personal care device according to the invention, the hair cutting module is inclined in relation to the main cabinet around two inclination axes that extend perpendicularly to each other.
    [021] The two tilt axes are located in a plane perpendicular to the main axis. The main axis can be considered as a Z axis while the two slope axes can be considered as an X axis and a Y axis.
    [022] A tilt shift around the X axis as well as around the Y axis can be seen as a combined tilt shift around a main tilt axis, the main tilt axis of which is also located in the plane perpendicular to the axis main and contains angles with the X axis and the Y axis. In one embodiment, the location of the sensor units is such that, in relation to a plane that extends through the main axis and each possible main inclination axis, the first unit sensor as well as the second sensor unit are partially located on one first side of said plane and are partially located on said plane or on a second side of said plane.
    [023] In practice this means that, to ensure that for each tilt shift around the X axis and the Y axis it will be possible to determine the axial displacement along the Z axis from the measured distances between the first and second units of sensor, it is preferred that at least in three different locations around the main axis the distances between the first and second sensor units are being measured or that the distances between the first and second sensor units change between at least three different adjacent locations or opposite in the first and second sensor units, where the average change in distances can be detected by the sensor.
    [024] In another embodiment of a personal care device according to the invention, the first sensor unit and the second sensor unit are arranged symmetrically around the main axis.
    [025] Due to the symmetrical arrangement of the sensor units, calculating the axial displacement from information obtained from the sensor units, such as the measured distances, is relatively easy.
    [026] In another embodiment of a personal care device according to the invention, the hair cutting module comprises several cutting units, each cutting unit having an external cutting element and an internal cutting element being rotatable about an axis of rotation in relation to the external cutting element, where the axes of rotation of the cutting units are located symmetrically around the main axis and each forms an angle between 0 degrees and 15 degrees with the main axis .
    [027] In such a mode, the hair cutting module with the number of cutting units is movable along the main axis and tilts around the inclination axis.
    [028] By measuring the axial displacement of the hair cutting module resulting from the normal pressure force on the user's skin, feedback can be provided to the user when the normal pressure force, and therefore the axial displacement, is out of range. Preferred range that provides great cutting performance and great skin comfort. The normal pressure force is the pressure force that extends perpendicularly to the user's skin. During normal use, normal force extends parallel to the main axis.
    [029] Due to the location of the sensor units, axial displacement can be determined independently of the tilt shift of the hair cutting module, whose tilt shift is, for example, caused by friction between the hair cutting module and the skin when the hair cutting module is moved over the skin surface.
    [030] In another embodiment of a personal care device according to the invention, the hair cutting module is connected to the main cabinet via a central rod member that accommodates a main drive shaft to commonly drive the internal cutting elements of the cutting units, in which the sensor is arranged symmetrically around said main driving axis.
    [031] In this mode, the drive shaft is centrally arranged on the central shank member, and drives the individual internal cutting elements of the cutting units, for example, via toothed wheels provided on individual cutting unit camshafts. The symmetrical arrangement of the sensor around the main drive shaft provides a compact construction of the sensor and the personal care device.
    [032] In another embodiment of a personal care device according to the invention, the first sensor unit or the second sensor unit comprises a ring-shaped coil and the other sensor unit comprises a plate that influences a magnetic field of the ring-shaped coil by displacing the second sensor unit relative to the first sensor unit in a direction parallel to the main axis.
    [033] The board can be produced from a metal, where the board will act as a short-circuit coil with just one winding. The plate can also be produced from an electrically insulating material that has a short-circuit coil or can be produced from ferrite. Such a plate influences the magnetic field produced by the coil, and changes the inductance of the coil when the average distance between the coil and the plate changes due to an axial displacement. However, when in this mode the hair cutting module tilts around the two tilt axes that extend along the X and Y axis as a result of frictional forces between the skin and the hair cutting module, the measurement of the axial displacement and thus the normal force is not affected, because the slope does not influence the average coil inductance since the average distance between the coil and the plate remains constant during such a slope.
    [034] The ring-shaped coil preferably extends perpendicular to the main axis and symmetrically around the main axis. The plate preferably extends perpendicular to the main axis.
    [035] In another embodiment of a personal care device according to the invention, the first sensor unit or the second sensor unit comprises at least three Hall sensor elements arranged in different predetermined locations around the main axis, and the other of the sensor units comprises at least three magnets, each magnet being disposed opposite a respective one of the Hall sensor elements, seen in directions parallel to the main axis.
    [036] By having at least three Hall sensor elements and cooperating magnets arranged in three different locations around the main axis, both the mean axial displacement of the hair cutting module in relation to the main cabinet and the tilt displacement around the two tilt axes extending along the X and Y axes can be detected by properly combining the measurements of at least three individual Hall sensor elements. From the measured displacements and known hardness properties of the spring member providing the spring force, both the average normal pressure force applied to the hair cutting module and the frictional forces applied to the hair cutting module in the directions X and Y when the hair cutting module moves over the skin surface and causes the hair cutting module to tilt in relation to the main cabinet, can be determined.
    [037] In another embodiment of a personal care device according to the invention, the Hall sensor elements as well as the magnets are located at regular intervals around the main axis.
    [038] Due to the symmetrical arrangement of the Hall sensor elements as well as the magnets, the calculation of the axial displacement of the hair cutting module from the information obtained from the Hall sensor elements is relatively easy.
    [039] In another embodiment of a personal care device according to the invention, the hair cutting module comprises an intermediate part, which is provided with the second sensor unit, and a first hair cutting part, which is separably connectable to the intermediate part, while the personal care device comprises a second hair cutting part which is different from the first hair cutting part, in which connecting the first hair cutting part to the intermediate part the second unit sensor is moved in a reference position in relation to the first sensor unit, or obtains a characteristic geometry or material that is different from, respectively, a reference position, geometry or characteristic material obtained by connecting the second cutting part of hair to the intermediate part.
    [040] Different hair cut parts are preferably suitable for different types of hair treatment, such as shaving or waxing, trimming, or brushing. The personal care device can be used for these different types of hair treatment by connecting the desired hair cutting part to the intermediate part. For some types of hair treatment it is not necessary to detect the pressure forces applied to the hair cutting module and to warn the user if the pressure forces are too high or too low. By moving the second sensor unit, as a result of connecting the first hair cutting part, to a different reference position in relation to the first sensor unit, or by providing the second sensor unit with a different geometry or a different characteristic material in compared to the reference position, geometry or characteristic material obtained as a result of connecting the second hair cutting part, it is possible to detect by means of the first and second sensor units that the hair cutting part is being connected to the intermediate part . The reference position of the second sensor unit is the position of the second sensor unit when it is being connected to the intermediate part, but without an external pressure force being applied to the hair cutting part, thus without operating the personal care device.
    [041] Information about the type of hair cutting part being connected to the intermediate part can be used to provide the user with information about the pressure forces, for example, only when a specific hair cutting part is connected to the intermediate part. .
    [042] In another embodiment of a personal care device according to the invention, the second sensor unit is being displaced against the spring force in relation to the intermediate part connecting the first hair cutting part to the intermediate part.
    [043] By displacing the second sensor unit in relation to the intermediate part, the second sensor unit is being moved in a reference position that differs from a reference position obtained when the second sensor unit is not being displaced in relation to the part intermediate. The distance between the reference positions of the second sensor unit, obtained by connecting the first and second hair cutting parts respectively, is preferably greater than the distance over which the second sensor unit will be moved during operation of the device. personal care, so that the sensor operating windows associated with the different hair cut parts will not overlap.
    [044] In another embodiment of a personal care device according to the invention, the first shaving part is a shaving or shaving part, while the second shaving part is a trimming part or brushing hair.
    [045] If the first shaving part is a shaving or shaving part, it is important to detect the pressure forces applied to a user's skin and to warn a user when necessary, while in the case of a part of trimming or brushing of hair such notice is not necessary. BRIEF DESCRIPTION OF THE DRAWINGS
    [046] Figure 1 is a schematic perspective view of a personal care device according to the invention,
    [047] Figure 2 is a side view of the personal care device according to the invention,
    [048] Figure 3 is a schematic cross section of a first modality of the personal care device as shown in Figures 1 and 2,
    [049] Figure 4 is a schematic cross section of a second modality of the personal care device as shown in Figures 1 and 2,
    [050] Figures 5 and 6 are detailed top and bottom views of the personal care device as shown in Figure 4,
    [051] Figures 7A and 7B are schematic top and side views of the sensor of the personal care device as shown in Figure 4,
    [052] Figure 8 is a schematic cross section of a third modality of the personal care device as shown in Figures 1 and 2,
    [053] Figures 9-11 are seen from the personal care device as shown in Figure 8, obtained by following respectively an axial displacement, tilt displacement and combined axial and tilt displacement of the hair cutting module in relation to the main cabinet,
    [054] Figure 12 is a schematic cross section of a fourth modality of the personal care device as shown in Figures 1 and 2,
    [055] Figure 13 is a schematic cross section of a fifth embodiment of the personal care device as shown in Figures 1 and 2, without a hair cut part,
    [056] Figure 14 is a schematic cross section of the personal care device as shown in Figure 13, with a first hair cut part,
    [057] Figure 15 is a schematic cross section of the personal care device as shown in Figure 13, with a second hair cut part,
    [058] Figure 16 is a graph showing the operation windows of the sensor of the personal care device as shown in Figure 13, with the first and the second hair cut part.
    [059] In the drawings, like reference numbers refer to like elements. DETAILED DESCRIPTION OF THE MODALITIES
    [060] Figures 1 and 2 show a personal care device according to the invention. The personal care device as shown in Figures 1 and 2 is a shaving or shaving apparatus 1 comprising a main cabinet 2, which is suitable to be held by a user of the shaving or shaving apparatus. In Figure 1, for the sake of clarity, the main cabinet 2 is only shown diagrammatically in view of the fact that within the scope of the present invention, the main cabinet 2 can have any suitable design. In Figure 2 a possible design of main cabinet 2 is shown. The shaving or shaving apparatus 1 further comprises a hair cutting module 3, which is suitable for contacting an area of skin having hair to be shaved or shaved and which can be moved accordingly with respect to this area. The hair cutting module 3 is connected to the main cabinet 2 via a central rod member 4, where the connection of the hair cutting module 3 to the main cabinet 2 can be separable. The cross-sectional dimensions of the central stem member 4 are considerably smaller than the cross-sectional dimensions of the hair cutting module 3, and the hair cutting module 3 is positioned some distance from an upper portion 5 of the main cabinet 2. Consequently, the connection between the main cabinet 2 and the hair cutting module 3 has a thin appearance, in which the hair cutting module 3 has an elevated position in relation to the main cabinet 2. Because of this, when a user performs a shaving or epilation action using the appliance to shave or epilate 1, he can have a transparent side view of the shaving module 3.
    [061] The hair cutting module 3 comprises three cutting units 6, which are arranged in a triangle formation. Within the scope of the present invention, the number of cutting units 6 can also be two or more than three. For completeness reasons, it is indicated that each of the cutting units 6 can be arranged so as to be mobile to a certain degree to facilitate each of them in following an outline of an area of skin to be shaved or shaved. For example, the cutting units 6 can be pivoted, to a limited degree, in relation to the central shank member 4. Each cutting unit 6 comprises an external cover-shaped cutting element 7 which is arranged on an upper side of the cutting unit 6, and which has a plurality of openings 8 to allow the hair to be shaved or shaved. The outer cap-shaped cutting element 7 is pivotally connected to a base portion 9 of the cutting unit 6. Just below the outer cap-shaped cutting element 7, inside the cutting unit 6, an element internal cut (not visible) is rotatable. During operation, a central portion of the inner cutting element is pressed against the outer shaped cover element 7 under a spring force.
    [062] The internal cutting elements of the cutting unit 6 are driven, via toothed wheels, by a main drive shaft that extends from a motor in the main cabinet 2 through the central stem member 4 in the hair cutting module 3
    [063] The shaving or shaving apparatus 1 described so far is known from WO2011055323A1 and W0200810139A1, in the name of the present applicant.
    [064] Figure 3 is a schematic cross-section of a first modality of the appliance for shaving or shaving 1. The central rod member 4 of the hair cutting module 3 is connected to the main cabinet 2 by means of a spring 10. A central rod 4 extends parallel to a main axis 11. The main axis 11 extends in the Z direction. Due to the spring 10, the hair cutting module 3 is displaceable in relation to the main cabinet 2 against the force of the spring 10 along of the main shaft 11. In addition, due to the spring 10, the hair cutting module 3 is displaceable in relation to the main cabinet 2 against the force of the spring 10 in inclination directions RI, R2 around two inclination axes 12, 13 The tilt axes 12, 13 extend in the X and Y directions, respectively. The X, Y, Z directions extend perpendicular to each other. By displacing the hair cutting module 3 in relation to the main cabinet 2, the central stem member 4 of the hair cutting module 3 is partially moved in a space 14 of the main cabinet 2. The spring 10 is preferably hard when along the X axis, along the Y axis and in a pivot direction around the Z axis.
    [065] The shaving or shaving apparatus 1 according to the invention comprises a sensor 15 located between the main cabinet 2 and the hair cutting module 3. The sensor 15 comprises a first sensor unit with cylindrical shape 16 connected to the cabinet main 2 and a second sensor unit with cylindrical shape 17 connected to the hair cutting module 3. The sensor units 16, 17 are located symmetrically around the main axis 11.
    [066] Due to this shape of the sensor units 16, 17, each location of the first sensor unit 16 in relation to the main cabinet 2 is located adjacent and opposite to a location of the second sensor unit 17 in relation to the cutting module. by 3.
    [067] Due to this shape of the sensor units 16, 17, the first sensor unit 16 as well as the second sensor unit 17 are partially located on a left side of a foreground that extends through the YZ axes and are partially located on the right side of said foreground. The first plane extends perpendicular to the plane of Figure 3.
    [068] Due to this shape of the sensor units 16, 17, the first sensor unit 16 as well as the second sensor unit 17 are also partially located on a front side of a second plane that extends through the XZ axes and are partially located on the back side of said background. The second plane extends parallel to the plane of Figure 3.
    [069] The internal cutting elements of the cutting units 6 of the hair cutting module 3 are rotatable in relation to the external cutting elements in cover shape 7 around the axes of rotation 18, 19 in relation to the external cutting element . A third axis of rotation is located behind the main axis 11. The three axis of rotation are located symmetrically around the main axis 11, where the three axes of rotation extend at an angle between 0 degrees and 15 degrees with respect to the axis main 11.
    [070] During shaving or epilation using the shaver or epilator 1, the user presses the shaving units 6 against the skin with a certain force, so that the skin presses against the shaving module 3 with a normal force Fn. Due to said normal force Fn that extends perpendicular to the skin and the forces Fx, Fy that extend parallel to the skin and that are caused by friction between the cutting units 6 and the skin when the cutting units 6 are moved over the skin , the hair cutting module 3 is being moved against the force of the spring 10 in the axial direction and in the inclination directions R1, R2.
    [071] Sensor 15 measures the average displacement of the hair cutting module 3 in multiple locations, each at a fixed radial distance from the main axis 11. By measuring this average displacement, sensor 15 is only sensitive to displacement in the Z direction, while rotations around the X and Y axes are canceled.
    [072] There is a direct relationship between the force Fn due to which the cutting module 3 is pressed against the force of the spring 10 in relation to the main cabinet 2 and the axial displacement. From the measured displacements and the known hardness properties of spring 10, the normal force Fn on the skin can be calculated using a processor (not shown). If the axial displacement and thus the normal force Fn is greater than a predetermined value, a warning signal will be produced by an alarm (not shown) located in the main cabinet 2.
    [073] Figures 4-7B show a second mode of the shaver or epilator 1. The shaver or epilator 1 differs from the shaver or epilator as shown in Figure 3 in the sensor configuration only. The sensor 25 of the shaver or epilator 1 as shown in Figures 4-7B comprises a first sensor unit with at least three Hall sensor units HO, H1, H2 located at regular intervals around the main axis 11 and at the same distance main axis radial 11. The three Hall sensor units HO, Hl, H2 are mounted at a distance from the spring 10 on a bottom 26 of the space 14. The sensor 25 also comprises a second sensor unit with three magnets MO, Ml, M2, each magnet MO, Ml, M2 being located opposite one of the three Hall sensor units HO, Hl, H2. The three MO, Ml, M2 magnets are mounted on a ring 27 connected to the central stem member 4 of the hair cutting module 3. The Hall HO, Hl sensor units are located at the first and second locations adjacent to and opposite the MO magnets , Ml located in the third and fourth locations, while the third Hall H2 sensor unit and third magnet M2 are located in the fifth and sixth locations, respectively. The spring 10 comprises three spring parts 28 connected with one end to the main cabinet 2 and the other end to the ring 27. Through a central opening 29 of the ring 27 extends a drive shaft 4 'to drive the axes of rotation of the units cutting edge 6. The drive shaft 4 'is located inside the central stem member 4.
    [074] If the shaver or epilator 1 is not being used, the MO, Ml, M2 magnets are located in a plane that extends parallel to a plane in which the Hall HO, Hl, H2 sensor units are located.
    [075] As can be seen in Figure 7A, the magnet MO and the Hall HO sensor unit are located on the right side of a plane through the YZ axis, the magnet Ml and the Hall Hl sensor unit are located on the plane through the YZ axis, while magnet M2 and Hall H2 sensor unit are located on the left side of the plane through the YZ axis. Furthermore, the magnets MO, M2 and the Hall sensor unit HO, H2 are located above a plane through the X-Z axis, while the magnet Ml and the Hall sensor unit Hl are located below the plane through the X-Z axis. Due to the specific location of the MO, Ml, M2 magnets and Hall HO, Hl, H2 sensor units, the exact displacement of the hair cutting module 3 in the directions RI, R2, Z can be measured, as will be explained below.
    [076] The MO, Ml, M2 magnets and Hall HO, Hl, H2 sensor units are located 120 degrees from each other.
    [077] For each combination of one of the M0, Ml, M2 magnets and one of the Hall H0, Hl, H2 sensor units, the distances between the first and third locations, the second and fourth locations and the fifth and sixth locations are measured . The measured distance between the third location of the magnet M0 and the first location of the Hall sensor unit H0 is h0, the measured distance between the fourth location of the magnet Ml and the second location of the Hall sensor unit H1 is hl and the measured distance between the sixth location of the M2 magnet and the fifth location of the Hall H2 sensor unit is h2.
    [078] From the measured distances hθ, hl, h2, the radius r and the angle of 120 degrees, the displacement Pz of the center C of the hair cutting module 3 can be calculated as follows: h02 = (hθ + h2) / two; average distance from the MO and M2 magnets to the Hall HO and H2 sensor units Pz = (hθ + hl + h2) / 3 © X = arcsen ((Pz □ hl) / r) © Y = arcsen ((h2 □ h0) / (r * "3))
    [079] The hardness properties of spring 10 are known, so that based on the known hardness properties cz of spring 10 and the displacement value Pz, the normal force Fn can be calculated Fn = cz * Pz.
    [080] If the normal force Fn is greater than a predetermined value, a warning signal will be given.
    [081] Likewise, based on the known hardness properties cx, cy of spring 10 against rotation about the X axis and Y axis respectively, the forces Fx and Fy can be calculated Fx = cx '© X and Fy = cy © Y. If the forces Fx, Fy are greater than a predetermined value, another warning signal will be given. In such a case, the user will be advised to use a gel to reduce the frictional forces Fx, Fy.
    [082] Figures 8-11 show a third modality of the razor or epilator 1. The razor or epilator 1 differs from the razor or epilator as shown in Figures 3 and 4-7B by the sensor configuration only. The sensor 35 of the shaver or shaver as shown in Figures 8-11 comprises a first sensor unit with a ring-shaped coil 36 located symmetrically around the main axis 11. The ring-shaped coil 36 is mounted at a distance of the spring 10 over the bottom 26 of the space 14. The sensor 35 also comprises a second sensor unit with a metal ring-shaped plate 37 located symmetrically around the main axis 11. The metal plate acts as a coil in short circuit with just one winding. The ring-shaped metal plate 37 is connected to the central stem member 4 of the hair cutting module 3.
    [083] The movement of the metal plate 37 in relation to the coil 36 influences the inductance of the coil 36.
    [084] If the hair cutting module 3 is only moved along the main axis 11, as shown in Figure 9, the hair cutting module 3 is moved from the position as shown in dotted lines to the position shown in continuous lines. Along the complete circumference of the coil, the partial contribution to the coil inductance will change in the same way. The change in inductance of the coil 36 is a measure of the displacement of the hair cutting module 3 and thus of the force Fn.
    [085] If the hair cutting module 3 is only tilted around an axis that extends perpendicular to the main axis 11, as shown in Figure 10, the hair cutting module 3 is moved from position as shown in dotted lines to the position shown in continuous lines. On the left side of Figure 10, the distance between coil 36 and plate 37 will increase, while on the right side of Figure 10, the distance between coil 36 and plate 37 will decrease. However, the average distance between coil 36 and plate 37 will remain the same, so the inductance of coil 36 will not be changed.
    [086] If the hair cutting module 3 is moved along the main axis 11 as well as tilted around an axis that extends perpendicular to the main axis 11, as shown in Figure 11, the hair cutting module 3 is moved from position as shown in dotted lines to position shown in continuous lines.
    [087] The change in inductance of coil 36 will be caused only due to displacement along the main axis 11.
    [088] It is also possible to use a plate of an electrically insulating material with a high magnetic permeability. Therefore, the plate can be produced from ferrite. In addition, such a plate will influence the coil inductance 36.
    [089] The sensors as described above have the advantages that: - the sensor has a very low cost; - the sensor can be placed inside the appliance for shaving or shaving so that no wire outside the appliance for shaving or shaving is necessary. This improves the water tightness of the appliance for shaving or shaving; the sensor can measure static displacements because it has a low oscillation over time; - the sensor has a very long life cycle since it is not mechanically coupled, and therefore is wear-free.
    [090] Figure 12 shows a fourth modality of the razor or epilator 1. The razor or epilator 1 differs from the razor or epilator as shown in Figures 3, 4-7B and 8-11 in the sensor configuration only . The sensor 45 is suitable for measuring the average displacement Pz of the hair cutting module 3 along the main axis 11, where the sensor is located at a distance from the main axis 11 to be able to allow a drive shaft, used to activate the axes of rotation of the cutting units, extend centrally through the sensor. Such a sensor 45 may comprise, for example, piezo-elements, force-sensitive resistors, capacitive distance sensors or effort meters.
    [091] It is also possible for the MO, Ml, M2 magnets to be connected to the main cabinet and the Hall HO, Hl, H2 sensor units to be connected to the hair cutting module 3.
    [092] It is also possible that the hair cutting module 3 can only be tilted around a single tilt axis.
    [093] Figures 13-15 show a fifth embodiment of the personal care device 51 according to the invention. The personal care device differs from the shaver or epilator 1 as shown in Figures 8-11 by the configuration of the shaving module 3. As the shaver or epilator 1 as shown in Figures 8-11, the sensor 35 of the personal care device 51 comprises a first sensor unit with a ring-shaped coil 36 located symmetrically about the main axis 11. The sensor 35 also comprises a second sensor unit with a ring-shaped metal plate 37 located symmetrically around the main axis 11. The metal plate acts as a short-circuit coil with just one winding. The movement of the metal plate 37 in relation to the coil 36 influences the inductance of the coil 36. In the position as shown in Figure 13, the metal plate 37 is located at a distance from the coil 36. The personal care device 51 differs from the shaving or shaving apparatus 1 as shown in Figures 8-11 in which the hair cutting module 3 comprises an intermediate part 52 with a tubular cabinet 53, a central opening 54 in cabinet 53 and an element 55 being able to hold a portion cutter 56, 57 in the opening 54. The intermediate part 52 also comprises several first springs 58. Each spring 58 comprises a horizontally extending part 59 connected to the metal plate 37, an inclined part 60 connected to the extending part horizontally 59 and a vertically extending part 61 connected to the inclined part 60. The vertically extending part 61 can slide in a direction parallel to the main axis 11 with respect to the cabinet 53.
    [094] The intermediate part 52 also comprises several second springs 62 connected with one end 63 to the tubular cabinet 53 and with another end 64 to the metal plate 37. The second springs 62 pull the metal plate 37 against the tubular cabinet 53. A cumulative hardness of the second springs 62 is less than the cumulative hardness of the first springs 58.
    [095] Furthermore, the intermediate part 52 comprises hook-shaped locking elements 65 that limit the movement of the metal plate 37 in a direction opposite to the tubular cabinet 53.
    [096] Figure 14 shows the personal care device 51 with a first hair cutting part 56 being separably connected to the intermediate part 52. The first hair cutting part 56 can comprise a base portion 9 and hair units. cut 6 (not shown in Figure 14), as the shaver or shaver 1 as shown in Figures 1 and 2. The hair cut part 56 comprises a tubular part 66 having an end portion 67. When the tubular part 66 the first hair cutting part 56 is inserted into the opening 54 of the intermediate part 52, is held in this position by means of the element 55. The element 55 can comprise a spring which is capable of holding the tubular part 62 firmly, but allowing for disunity of the first hair cutting part 56 when a user pulls firmly on the first hair cutting part 56. Such a connection is known in personal care devices and will not be explained further. When the tubular part 62 of the first hair cutting part 56 is inserted into the opening 54 of the intermediate part 52, the end portion 67 will be pressed against the vertically extending parts 61 of the springs 58, due to whose forces the parts that are vertically extending 61 of the springs 58 will be moved in a direction parallel to the main axis 11 and will move the metal plate 37 towards the coil 36 over a distance ds. This position of the metal plate 37 is the first reference position and when the personal care device 51 is in use, the metal plate 37 will be moved further towards the coil 36 when the cutting units 6 are pressed against the skin of a user.
    [097] Figure 15 shows the personal care device 51 with a second hair cutting part 57 being separably connected to the intermediate part 52. The second hair cutting part 57 can comprise a trimmer or brush (not shown in Figure 15). The hair cutting part 57 comprises a tubular part 68 having an end portion 69. The tubular part 68 of the second hair cutting part 57 is connected to the intermediate part 52 in the same way as the tubular part 66 of the first cutting part of hair 56. However, when the tubular part 68 of the second hair cutting part 57 is inserted into the opening 54 of the intermediate part 52, the end portion 69 will be located at a distance d2 from the vertically extending parts 61 of the springs 58 and will not be pressed against the vertically extending parts 61 of springs 58. The distance d2 between the metal plate 37 and the coil 36 is the same as the distance d0 in Figure 13, where no hair cutting part is connected to the intermediate part 52. This position of the metal plate 37 is the second reference position and when the personal care device 51 is in use, the metal plate 37 will be moved further towards the coil 36 when od The personal care device is pressed against a user's skin.
    [098] Figure 16 shows a graph in which the distance d between metal plate 37 and coil 36 is plotted on the X axis and the corresponding value for inductance is plotted on the Y axis. In this graph, the first reference position it is at a distance dl, which is less than the distance d2 from the second reference position. When the personal care device 51 is in use, the distance d will vary in the gray area 70, 71, respectively.
    [099] The respective inductance values will vary in relation to an operation window W1, W2 respectively.
    [0100] By measuring the inductance, it can be determined whether the first or second hair cutting part 56, 57 is connected to the intermediate part 52.
    [0101] The same change in the operating window can also be achieved by compensating the electrical resistance of metal plate 37, for example, by a mode in which metal plate 37 has a crack that is short-circuited when the first part of shaving with a shaving or epilation unit is placed. The principle of changing the operating window of sensor 35 can also be applied over other force detection principles, for example, Hall sensor, effort meter or piezo-based force sensors.
    [0102] The personal care device can also be a shaving or shaving device, a trimmer, a beauty care device or another type of cutting device.
    [0103] The first, second, third and fourth locations can also be located on the same side of a plane through the main axis and the inclination axis if the distance from the first location to the plane differs from the distance from the second location to the plane. The main feature is that the change in distance due to the tilt movement is different between the first and third locations and between the second and fourth locations.
    [0104] One skilled in the art will realize that the present invention is in no way limited to the preferred embodiments. Other variations to the disclosed modalities can be understood and performed by those skilled in the art in the practice of the claimed invention, from a study of the drawings, the disclosure, and the attached claims.
    [0105] In the claims, the word "comprising" does not exclude other elements or stages, and the indefinite article "one" or "one" does not exclude a plurality. The mere fact that certain measurements are referred to in mutually different dependent claims does not indicate that a combination of these measurements cannot be used to advantage.
    [0106] Any reference signs in the claims should not be construed as limiting the scope of the claims. LIST OF REFERENCE SIGNALS 1 appliance for shaving or shaving 2 main cabinet 3 hair cutting module 4 center rod member 4 'drive shaft 5 upper portion 6 cutting unit 7 external cutting element 8 opening 9 base portion 10 spring 11 main axis 12 tilt axis 13 tilt axis 14 space 15 sensor 16 first sensor unit 17 second sensor unit 18 rotation axis 19 rotation axis 25 sensor 26 bottom 27 ring 28 spring part 29 central opening 35 sensor 36 coil 37 metal plate 45 sensor 51 personal care device 52 intermediate part 53 tubular cabinet 54 central opening 55 element 56 hair cutting part 57 hair cutting part 58 first spring 59 horizontally extending part 60 inclined part 61 extending part vertically 62 second spring 63 end 64 end 65 tubular part 66 tubular part 67 end portion 68 tubular part 69 end portion 70 gray area 71 ci area nza C center Fn force Fn H0 Hall sensor unit H1 Hall sensor unit H2 Hall sensor unit M0 magnet M1 magnet M2 magnet Pz offset r radius R1 tilting direction R1 R2 tilting direction R2 W1 operating window W2 operating window Z direction δ distance
    权利要求:
    Claims (13)
    [0001]
    1. PERSONAL CARE DEVICE, comprising a main cabinet (2), a hair cutting module (3) that is displaceable in relation to the main cabinet (2) against a spring force in a direction parallel to a main axis ( 11), and a sensor (15, 25, 35, 45) comprising a first sensor unit (16) connected to the main cabinet (2) and a second sensor unit (17) connected to the hair cutting module (3 ), said sensor being arranged and configured to measure a displacement of the second sensor unit (17) in relation to the first sensor unit (16) in a direction parallel to the main axis (11), characterized by the hair cutting module ( 3) tilt in relation to the main cabinet (2) against a spring force around at least one tilt axis (12, 13) which extends perpendicular to the main axis (11), where the first sensor unit ( 16) is arranged in at least one first and a second location in relation to the cabinet p main (2) and where the second sensor unit (17) is arranged in at least a third and fourth locations in relation to the hair cutting module (3) adjacent to, respectively, the first and second locations seen in directions parallel to the main axis, a distance between the first and second locations being at least 25% of a distance between the first and third locations, and in which when tilting the hair cutting module (3) in relation to the cabinet main (2) a change in distance between the first and third locations is different from a change in distance between the second and fourth locations.
    [0002]
    2. PERSONAL CARE DEVICE, according to claim 1, characterized by the third and fourth locations being opposite, respectively, the first and second locations, seen in directions parallel to the main axis.
    [0003]
    PERSONAL CARE DEVICE, according to one of claims 1 or 2, characterized in that, in relation to a plane that extends through the main axis (11) and the inclination axis (12, 13), the first and the third locations are located on a first side of said plane while the second and fourth locations are partially located on said plane or on a second side of said plane.
    [0004]
    4. PERSONAL CARE DEVICE, according to any one of claims 1 to 3, characterized in that the hair cutting module (3) can be tilted in relation to the main cabinet (2) around two tilt axes (12, 13) that extend perpendicularly to each other.
    [0005]
    5. PERSONAL CARE DEVICE, according to any one of the preceding claims, characterized in that the first sensor unit (16) and the second sensor unit (17) are arranged symmetrically around the main axis (11).
    [0006]
    6. PERSONAL CARE DEVICE, according to any one of the preceding claims, characterized in that the hair cutting module (3) comprises several cutting units (6), each cutting unit (6) being provided with an external cutting element (7) and an internal cutting element (7) being rotatable about an axis of rotation (18, 19) in relation to the external cutting element (7), with the rotation axes (18, 19) of the units cutting edges (6) are located symmetrically around the main axis (11) and each forms an angle between 0 degrees and 15 degrees with the main axis (11).
    [0007]
    7. PERSONAL CARE DEVICE, according to claim 6, characterized in that the hair cutting module (3) is connected to the main cabinet (2) via a central rod member (4) that accommodates a main drive shaft to actuate commonly the internal cutting elements (7) of the cutting units (6), and the sensor (15, 25, 35, 45) is arranged symmetrically around said main driving axis.
    [0008]
    8. PERSONAL CARE DEVICE, according to any one of the preceding claims, characterized by the first sensor unit (16) or the second sensor unit (17) comprising a ring-shaped coil (36) and the other one of the units sensor (16, 17) comprises a plate (37) which influences a magnetic field of the ring-shaped coil (36) by displacing the second sensor unit (17) in relation to the first sensor unit (16) in one direction parallel to the main axis (11).
    [0009]
    9. PERSONAL CARE DEVICE according to any one of the preceding claims 1 to 7, characterized by the first sensor unit (16) or the second sensor unit (17) comprising at least three Hall sensor elements (HO, Hl, H2) arranged in different predetermined locations around the main axis (11), and the other of the sensor units (16, 17) comprises at least three magnets (MO, Ml, M2), each magnet being disposed opposite a respective one Hall sensor elements (HO, Hl, H2), seen in directions parallel to the main axis.
    [0010]
    10. PERSONAL CARE DEVICE, according to claim 9, characterized by the Hall sensor elements (HO, Hl, H2) as well as the magnets (MO, Ml, M2) being arranged at regular intervals around the main axis (11 ).
    [0011]
    11. PERSONAL CARE DEVICE, according to any one of the preceding claims, characterized in that the hair cutting module comprises an intermediate part, which is provided with the second sensor unit, and a first hair cutting part, which is in a way separable connectable to the intermediate part, while the personal care device comprises a second part of hair cut which is different from the first part of hair cut, being that, when the connection of the first part of hair cut to the intermediate part occurs, the second sensor unit is moved to a reference position in relation to the first sensor unit, or obtains a characteristic geometry or material that is different from, respectively, a reference position, geometry or characteristic material obtained by means of connection of the second hair cutting part to the intermediate part.
    [0012]
    12. PERSONAL CARE DEVICE, according to claim 11, characterized in that the second sensor unit is displaced against a spring force in relation to the intermediate part by connecting the first hair cutting part to the intermediate part.
    [0013]
    13. PERSONAL CARE DEVICE, according to one of claims 11 or 12, characterized in that the first part of the hair cut is a part of shaving or hair removal and the second part of the hair cut is a part of hair trimming or brushing hair.
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    同族专利:
    公开号 | 公开日
    US9919437B2|2018-03-20|
    CN104768718B|2016-09-21|
    BR112015008478A2|2017-07-04|
    JP5977460B2|2016-08-24|
    US20160236360A1|2016-08-18|
    WO2015025064A1|2015-02-26|
    RU2674792C2|2018-12-13|
    RU2015121422A|2016-12-27|
    CN104768718A|2015-07-08|
    EP2888086B1|2016-03-16|
    RU2015121422A3|2018-06-08|
    JP2015536778A|2015-12-24|
    EP2888086A1|2015-07-01|
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    法律状态:
    2018-11-06| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-12-24| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-06-23| B09A| Decision: intention to grant|
    2020-11-03| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 27/10/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP13191490.5|2013-11-05|
    EP13191490|2013-11-05|
    PCT/EP2014/072931|WO2015025064A1|2013-11-05|2014-10-27|A personal care device|
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