• 专利附录
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    • 专利摘要:
    Shown and described is a height adjustable armrest for a chair, in particular an office chair, with an armrest (101), a holder (107) for the armrest and a mechanism for adjusting the height of the armrest (101) relative to the holder (107); the mechanism comprising at least two mutually displaceable parts, namely a first part (123) and a second part (127), wherein the armrest (101) is connected to the first part (123) of the mechanism and the holder (107) to the second Part (127) of the mechanism is connected, and a preferably opposite the armrest (101) fixable housing (120), which covers the mechanism. According to the invention, it is provided that the housing (103, 105) has a slot (111) through which projects a bridge structure (122), by means of which the second part (12) of the mechanism is fastened to the holder.
    公开号:CH710300A2
    申请号:CH01393/15
    申请日:2015-09-25
    公开日:2016-04-29
    发明作者:Fissl Dietmar；Würl Harald
    申请人:Sitag Ag；
    IPC主号:
    专利说明:

    TECHNICAL FIELD OF INVENTION
    The invention comprises a height-adjustable armrest according to the preamble of claim 1.
    BACKGROUND OF THE INVENTION
    An armrest is an equipment feature of a chair. There is space to hang up and support the forearms to the right and left of the seat. For work chairs, e.g. An office chair, armrests not only provide comfort but are also relevant from an ergonomic point of view. In order to meet ergonomic requirements, the adjustability, and in particular the height adjustment, of the armrests is very important.
    TASK
    It is an object of the present invention to provide an armrest for a chair, in particular for an office chair, which has a stable mechanism for height adjustment and at the same time is relatively inexpensive to manufacture. A further object is to find an armrest construction which incorporates a height adjustment which is preferably not visible from the outside, which is therefore preferably located in a body that is substantially closed on all sides. In particular, the armrest should have no Einklemmstellen for the user.
    DESCRIPTION
    The invention relates to a height-adjustable armrest for a chair, in particular an office chair, withan armrest,a holder for the armrest, which can be connected to a chair or fixed to a chair,a mechanism for adjusting the height of the armrest relative to the holder, the mechanism comprising at least two mutually displaceable parts, namely a first part and a second part, wherein the first part of the mechanism connected to the armrest (in particular firmly connected or attached to the armrest) and the second part of the mechanism is connected to the holder (in particular fixedly connected to the holder), anda housing for shuttering the two mutually displaceable parts, which is preferably fixed relative to the armrest and / or the first part, in particular which is preferably fixed or attached to the armrest and / or on the first part,wherein the height-adjustable armrest according to the invention is characterized in that the housing has a slot through which, preferably non-contact, a bridge or bridge structure, by means of which the second part of the mechanism fixed to the holder or fixed or fixed (ie with the firmly connected) is. The inventive height-adjustable armrest - although height adjustable - thus has an optical armrest support arm of constant length. As a result, the design of a chair is considered to be substantially consistent with different armrest height adjustments. This is not the case with conventional chairs with pull-out armrests.
    The extension of the slot and the displacement distance of the two mutually displaceable parts of the mechanism for height adjustment are suitably coordinated so that upon actuation of the mechanism for height adjustment, the position of the armrest relative to the position of the holder in the direction of extension of the elongate hole adjustable or is displaceable. By operating the height adjustment mechanism, the position of the armrest is adjustable in the direction of elongation of the elongated hole relative to the position of the holder, in particular the first part of the mechanism together with the housing and the armrest relative to the second part of the mechanism and the holder in the direction the extension of the slot can move. The second part of the mechanism moves advantageously only within the housing relative to the first part of the mechanism.
    The housing is fixable with respect to the armrest (in particular, for example, on the armrest) and / or against the first part of the mechanism (in particular, for example, on the first part of the mechanism).
    The inventive height-adjustable armrest is characterized in a preferred embodiment, characterized in that the housing forms a sleeve having a first and a second end. The housing is in particular tubular. Preferably, the housing consists of two mating parts, in particular a shell and a guide bar, which suitably put together form a sleeve shape with a first and a second end. The housing preferably forms a closed at least at one end sleeve. The housing thus conveniently conceals all moving parts but also all the details. Pinching of the fingers, clothing parts, etc. during operation of the height adjustment mechanism can thereby be substantially prevented. By operating the height adjustment mechanism, the position of the armrest is adjustable in the direction of elongation of the elongated hole relative to the position of the holder, in particular the first part of the mechanism together with the housing and the armrest relative to the second part of the mechanism and the holder in the direction the extension of the slot can move. The second part of the mechanism moves only within the housing relative to the first part of the mechanism.
    In particular, it is preferred that the sleeve is closed at its first end remote from the armrest (i.e., at the lower end). This has the advantage that it is clear that a change in length of the armrest support or the housing is not possible or not provided.
    Conveniently, the sleeve has at its second end an opening which is covered by the armrest or covered or covered.
    The inventive armrest - albeit height adjustable - is thus equipped with an armrest support constant or unchangeable length. As a result, the overall impression of a chair remains essentially the same even with a change in the height adjustment of the armrest, while the overall impression of a chair is more likely to be influenced by the armrest supports changing in length and thus the recognition of the chair may be impaired if the armrest adjustment is changed.
    Conveniently, the slot extends substantially in the direction of the (longitudinal) sleeve extension. This goes hand in hand with a corresponding expedient arrangement of the height adjustment mechanism.
    The guide bar preferably extends in the direction of the (longitudinal) sleeve extension. This simplifies in particular the assembly of the items to the armrest.
    The slot is preferably formed in the guide rail. This arrangement is also advantageous in terms of assembly.
    The bridge (or called bridge structure) projects according to the invention through the slot and thereby connects the holder, which is arranged substantially outside the housing, with the second part of the mechanism for height adjustment, which is arranged within the housing.
    The said bridge or bridge structure is in particular formed between the second part of the mechanism and the holder. Via the bridge or bridge structure, the second part of the mechanism can be attached to the holder or the second part of the mechanism is attached to the holder. The bridge structure expediently leads from the holder through the slot to the second part of the mechanism. The slot, however, is expediently fixed relative to the first part of the height adjustment mechanism and thus in relation to the armrest. The bridge structure is displaceable relative to the slot; In particular, it is arranged in the extension direction of the slot in this displaceable. The displaceability of the bridge structure in and in relation to the slot (and thus also the first part of the mechanism and the holder in relation to the slot) results in particular from the fact that the Verstreurichtung the height adjustment mechanism and the longitudinal orientation of the slot are aligned parallel to each other. Thus, when moving the first part of the height adjustment mechanism (e.g., pulling or pushing the armrest) relative to the second part of the height adjustment mechanism, this second part of the height adjustment mechanism can be translated in parallel with the orientation of the slot. A fixed to the second part of the height adjustment (fixed) and projecting through the slot bridge structure is thus moved when moving the second part of the Höhenverstellmechanismus in relation to the first part of the Höhenverstellmechanismus in the slot, parallel to the slot and in the direction of extension of the slot.
    The bridge may optionally be an integral part of the holder or fastened by fastening means to this. The bridge may further optionally be an integral part of the second part of the mechanism for height adjustment or fastened by fastening means thereto. Preferably, the bridge is an integral part of the holder and fixed by fasteners on the second part of the mechanism for height adjustment or fixed.
    The bridge is expediently designed to be substantially shorter in the direction of the extension of the slot than the extension of the slot is long. The dimension of the slot in its longitudinal extent is in particular many times larger than the cross-sectional dimension of the slot arranged in the bridge in the corresponding direction. As a result, the bridge in the slot, in particular along the extension of the slot, and thus the holder along the slot is adjustable.
    The holder for the armrest is expediently designed with a first connection region and a second connection region, wherein the holder can be connected via the first connection region with a chair or fixed to a chair and the holder via the second connection region with the second part the height adjustment mechanism is connected or fixed to the second part of the mechanism.
    The housing, is used in particular for shuttering the two mutually displaceable parts of the mechanism for height adjustment. The housing, optionally the housing together with the armrest, sheathed or envelops the two mutually displaceable parts of the mechanism for height adjustment advantageously both at maximum high position of the armrest and at maximum subscript. In particular, the second part of the mechanism is disposed within the housing. This provides high security and ease of use and is also visually advantageous.
    The above object is further achieved by a height-adjustable armrest for a chair, in particular an office chair, with an armrest and, a holder which is connectable to the chair, wherein the height adjustment, the position of the armrest relative to the holder is adjustable, wherein the height-adjustable armrest according to the invention characterized in thatthe armrest has on its underside a guide rail and a shaft, wherein the guide rail is provided with a guide, the shaft is designed to be axially rotatable and the guide and the shaft are aligned parallel to one another,on the holder a shaft stop is fixed andfor height adjustment on the one hand, the position of the armrest relative to the holder is made adjustable, that the guide bar relative to the shaft stop is displaceable, wherein the shaft is slidably guided in a first rotational position along its axis of rotation in an opening of the shaft stop, and on the other hand, the position of Armrest against the holder is formed lockable, that the guide bar relative to the holder can be locked by the shaft engages in a second rotational position in the shaft stop.
    The inventive armrest is particularly stable and provides a particularly advantageous support function for the user. In addition, the height adjustment mechanism is easy to use and inexpensive to manufacture.
    The below-mentioned advantageous embodiments lead alone or in combination with each other to further improvements of the inventive height-adjustable armrest.
    It is preferred that the shaft stop is fixed terminally on a sliding element, which in turn is fixed to the holder, wherein the sliding element is designed such that the sliding element and the guide rail are guided by means of the guide relative to each other displaceable and / or the shaft during the displacement in the axial direction and during the rotational movement in the sliding element is guided.
    The shaft stop and the guide bar are guided in particular by means of the guide relative to each other displaceable. The relative movement is guided by the guide. Insofar as a sliding element is present, the displacement is realized by the interaction of sliding element and guide bar in a particularly advantageous manner. An elongated design of the sliding element acts stabilizing on the armrest.
    The sliding element is characterized in particular by having at least one inner and one outer sliding surface.
    Conveniently, the slider is made of aluminum or plastic, preferably in particular made of aluminum production technology, the production by means of a casting process is particularly advantageous. An aluminum casting in particular has the advantage that it is inexpensive and at the same time grants high stability of the armrest due to its high strength in the application as a sliding element.
    The sliding element may be enclosed by sliding rings or sliding clamps. As a result, the height adjustment is particularly low friction and thus jerk-free.
    The shaft has, in particular, a sequence in the axial direction of spaced-apart raster teeth. This serves to adjust and lock the height of the armrest.
    The shaft expediently has a lever arm. By means of actuation of the lever arm, the rotational movement of the shaft can be triggered to release the lock.
    Conveniently, the rotational position of the shaft is adjusted by the lever arm is moved via an actuating element from a first position to a second position, wherein the shaft is guided from the second rotational position to the first rotational position.
    Conveniently, the lever arm with respect to the sequence of grid teeth in the axial direction on the side of the armrest (especially shortly below the armrest, preferably within hand length) arranged.
    Advantageously, the actuating element biases the lever arm by means of a force member in the first position, whereby the shaft is held in the second rotational position. As a result, the armrest or its height adjustment mechanism is in a locking position.
    By pressing the actuator, the shaft can be performed in the first rotational position, while sliding or each latched raster teeth from the shaft stop and the lock is released. By releasing the actuator, the shaft returns to the second rotational position, i. in the locked position. At a moment in which the shaft stop hits a grid tooth gap, the adjacent grid teeth or the adjacent grid teeth can engage the shaft stop. Latches the second rotational position of the shaft is reached.
    The force member includes or preferably corresponds to a compression spring. The actuating element and / or the guide bar advantageously have a receptacle or structure for local positioning of the force element, in particular its end regions, on.
    The shaft may have a final tooth, which is formed with respect to the alignment of the other teeth of the sequence such that in the first rotational position, the shaft can strike the shaft stop, whereby a maximum height adjustment is defined.
    Conveniently, the guide bar forms together with the shell a housing, which encloses the shaft and the shaft stop and, to that extent, the sliding element substantially at least longitudinally substantially.
    Conveniently, a cover plate carries at its top the armrest while the guide rail and the shaft are fixed on its underside.
    In addition, the shaft is advantageously axially rotatably mounted on the cover plate, in particular by a fastening means with head and shaft, e.g. a screw. The rotatability of the shaft with respect to the cover plate may e.g. be ensured by a sleeve by being drawn between the cover plate and shaft over the shaft of the fastener. The bushing allows rotation of the fastener and thus the shaft which is fastened to the cover plate by the fastener.
    Preferably, the shaft is made of plastic. Particularly preferably, the shaft is manufactured in a casting process. Cost-effective are e.g. Injection molding process, such as a plastic injection process.
    Further advantages and features will become apparent from the following description of an embodiment of the invention with reference to schematic representations. Said preferred features can be realized in any combination - unless they are mutually exclusive. It shows in not to scale representation:<Tb> FIG. 1: <SEP> is a side view of an armrest according to the invention;<Tb> FIG. 2: <SEP> a front view of an armrest according to the invention;<Tb> FIG. 3: <SEP> a sectional view of an inventive armrest (without armrest);<Tb> FIG. 4: <SEP> an exploded view of an inventive armrest (without armrest element);<Tb> FIG. 5: <SEP> a first view of an actuator (oblique view from below);<Tb> FIG. 6: <SEP> is a second view of an operating member (plan view);<Tb> FIG. 7: <SEP> a view of a shaft stop (from below);<Tb> FIG. 8: <SEP> a three-dimensional view of a shaft;<Tb> FIG. 9: <SEP> four cross-sectional images of the shaft, a) at a position of a tooth, b) at a position between two teeth, c) at a position between the lowest tooth (shaft end) and the second lowest tooth, d) at a position of the tooth lowest tooth (wave termination).<Tb> FIG. 10: <SEP> Another three-dimensional view of a shaft;<Tb> FIG. An exploded view of those parts of an armrest according to the invention, which are fixedly secured to a seat, and a guide bar, which is slidably mounted in relation to the aforementioned components;<Tb> FIG. 12: <SEP> An exploded view of housing parts, a) a shell, b) a guide strip.
    Fig. 1 and Fig. 2 show an inventive height adjustable armrest in two lateral views, which are rotated by 90 ° from each other. The visible components in the assembled state of the armrest are an armrest 101, a shell 103, a guide rail 105, a holder (or arm support holder called) 107 and the actuator 108th
    The armrest 101 is used for laying or supporting elbows and / or forearms. For the support surface 109 of the armrest 101 is normally oriented approximately horizontally, but may also be carried out in an inclined position. Customizable versions of the armrest may be equipped with a mechanism for adjusting the inclination of the armrest 101 and the armrest surface 109, respectively.
    The armrest 101 can be fixed indirectly via the holder 107 on a chair, in particular on an office chair. The holder 107 is normally disposed below the armrest surface 109 and the armrest 101, respectively. In order to allow a height adjustment, the armrest 101 is arranged displaceably against the holder 107. The armrest 101 is guided relative to the holder 107 by means of the guide rail 105. The mechanism for height adjustment of the armrest 101 against the holder 107 can be seen from FIG. 3 to FIG. 12.
    The guide rail 105 extends from the armrest 101, expediently in particular from the bottom of the armrest 101 from down to where the armrest can be attached via the holder 107 to a seat or attached. Depending on the design, the guide bar of the armrest 101 may be directed vertically or obliquely downward. In Fig. 1, a slot 111 is shown, which is recessed in the guide rail 105. The holder 107 cooperates via the slot 111 with the mechanism for height adjustment of the armrest 101. The slot 111 in the guide rail 105 indicates the direction or the displacement path for height adjustment. The slot 111 is preferably located on the lower half of the guide rail 105, i. that half of the guide rail 105, which repels of the armrest 101.
    The holder 107 is preferably formed angularly. A first leg 113 is provided with attachment structures 115, e.g. one or more continuous drill and / or slots, via which the holder 107 can be attached to a chair, e.g. by screwing with a chair frame or chair frame (Fig. 4). A second leg 117 is also provided with attachment structures 119, e.g. Drilled holes or tapped holes, by means of which the holder 107 is fixed to components of the height adjustment mechanism, e.g. by screwing (Fig. 3). The holder has, so to speak, a first connection region 116 and a second connection region 118, wherein the first connection region 116 serves for fastening the holder 107 and thus the armrest to a chair, and the second connection region 118 for fastening the height-adjustable armrest 101 to the holder 107 a projection 122 on the second leg 117 and on the second connection region 118 of the holder 107 a bridge, by means of which a component of the height adjustment mechanism is attached to the holder 107 through the slot opening.
    The shell 103 is expediently elongated; however, it could have other shapes for design purposes. Shell 103 and guide strip 105 are advantageously matched to each other, so that together they form a housing 120 (preferably a closed housing) and thus privacy shield for the height adjustment mechanism. Preferably, guide rail 105 and shell 103 are formed such that they are plugged into each other to form together a housing 120 for the height adjustment mechanism. The attachment of a shell 103 is not absolutely necessary from höhenverstelltechnischer perspective, since the guide rail 105 which is attached to the armrest 101, this carries and fixed. However, in addition to the visual benefits, the tray 103 may also have a supporting and stabilizing effect on the entire armrest, for example by reinforcing the guide rail 105.
    The actuating element 108 is expediently arranged just below the armrest 101. The housing, in particular the shell 103, expediently has a recess 121 for the actuating element 108. Alternatively, the guide bar could have a recess for an actuating element.
    Shell 103, guide strip 105 and optionally arm rest 101 together form an optically closed body, which only has a narrow, upwardly leading slot, i. E. the above-mentioned slot 111, and optionally a recess 121 for the actuator 108 has. In the example shown, the armrest 101 shell 103 and guide bar expediently from the top down.
    The actuator 108 acts on the height adjustment mechanism. A user can act by means of the actuator 108 on the height adjustment mechanism within the housing. Conveniently, the height adjustment function is blocked or locked in the rest position of the actuating element 108. When the actuator 108 is actuated, i. In the example shown, the height adjustment function is activated by releasing the latch so that the armrest 101 translates up and down, i. adjust in height, leaves.
    The inventive, height-adjustable armrest includes an adjustment system for height adjustment of the support surface 109, which is housed in a downwardly and upwardly preferably closed tube-like housing body. An armrest according to the invention (without arm rest 101) and its adjusting mechanism is shown in a sectional view in FIG. 3 and in an exploded view in FIG. 4. Further details and further views of some of the components are shown in FIGS. 5 to 12.
    The above-mentioned object is achieved in particular in that the inventive armrest is essentially divided into two component groups, which are mutually adjustable, in particular for adjusting the height of the armrest 101 and thus in particular the armrest surface 109 relative to the seat of a seat. When assembled, the two component groups result in the armrest, wherein the complete height adjustment system is preferably enclosed in a housing.
    The first component group preferably includes at least one armrest 101, a guide rail 105, a shaft 123 and an actuator 108. The armrest 101 is preferably located on the guide rail 105 (ie at the upper part or end of the guide rail) and is attached thereto , The guide rail 105 defines a guide (eg one or more rails 125) for a stop 127 and / or preferably for a sliding element 129. Also fastened to the guide rail 105 is the shaft 123. The attachment of the shaft 123 to the guide rail 105 is according to the invention designed such that a rotational movement of the shaft 123 about its own axis is possible, but as possible there is no translational movement of the shaft 123 relative to the guide rail 105. The attachment of the shaft 123 while maintaining the rotary freedom of the shaft 123 about its own axis (axis of rotation) can e.g. via a screw (alternatively a riveted joint) with slide bushing 131 on the shank of the screw 133 (or the rivet) are made. The shaft 123 is preferably via a bridge, e.g. executed as a cover part or plate 135 attached to the guide rail 105. The armrest 101 is preferably also attached via the bridge to the guide rail 105. About the actuator 108, the shaft 123 can be rotated in rotation about its own axis. The shaft 123 is fixed to the guide rail 105 in such a manner that the rotation axis of the shaft 123 is aligned parallel to the guide path of the guide (i.e., the rail 125).
    The second component group includes a stop 127 for the shaft 123 and a holder 107 for attachment of the second component group (and thus effectively the armrest) to a chair or other object that can serve as a seat or couch. Advantageously, the second component group further includes a sliding member 129 for guiding and stabilizing the shaft 123. The stopper 127 and the holder 107 are fixed to each other (fixed, i.e. mutually immovable). Preferably, the connection between abutment 127 and retainer 107 is made via slide member 129, particularly by mounting stop 127 and retainer 107 respectively (directly) on slide member 129, e.g. by screwing with this.
    Stop 127 and holder 107 or sliding element 129 and holder 107 are attached from two sides of the guide strip 105 ago (inside and outside) together, but remain together relative to the guide rail 105 slidably. An elongated hole 111 exemplarily serves as an opening in the guide strip 105. The displacement movement is advantageously predetermined by guide structures, in particular one or more rails 125 which are formed on the guide strip 105 (for example on the inside of the guide strip). Advantageously, the rails 125 are an integral part of the guide rail. The displacement movement of the stop 127 and optionally of the sliding element 129 relative to the guide rail 105 is defined and / or guided by the guide structures 125. To facilitate the sliding of the stop 127 and, where appropriate, of the sliding element 129 on the guide rail 105, the stop 127 or, preferably, the sliding element 129 may be provided with sliding clamps 137, e.g. made of rubber, be equipped. To insert the sliding clamps, one or more notches 138 may be provided in the sliding member 129.
    The shaft 123 and the shaft stop 127 cooperate by being stepwise adjustable against each other in the axial direction of the shaft 123, wherein a partial rotation of the shaft 123 about its axis of rotation of the locking or unlocking is used. If the shaft stop 127 is equipped with the sliding element 129, this likewise cooperates with the shaft 123 in that it stabilizes and / or guides the shaft 123 about its own axis during the sliding movement of the shaft 123 relative to the sliding element 129 and during the rotation of the shaft 123 ,
    The housing is preferably formed from the guide strip 105 or optionally further of the shell 103 and / or the cover plate 135, which all belong to the first component group described above.
    The shaft 123 is rod-shaped (FIG. 8). It has a multiplicity of projections or raster teeth 139 arranged peripherally in the axial direction one above the other. The cross-section 141 of the shaft 123 at positions of the ratchet teeth 139 (Figure 9) preferably corresponds approximately to the cross-sectional shape of the recess 143 in the stop 127 (Figure 7), which serves as a counterpart to the shaft 123 for releasable locking with the shaft 123, the Cross-section of the recess 143 of the stopper 127 is designed slightly larger, so that the shaft with (slight) play in the axial direction relative to the stop 127 is displaceable. The game in cross-sectional plane is e.g. less than 1 mm. The cross section 141 of the shaft 123 at the position of the ratchet teeth 139 is in particular formed as a circular segment with a center angle of more than 180 °, preferably more than 185 °.
    The cross section 145 of the shaft 123 at positions between the ratchet teeth 139 is formed such that raster teeth 139 can lock by rotation of the shaft 123 with the stop 127, in particular by the ratchet teeth 139 upon rotation of the shaft 123 about its axis over the cross-sectional contour protrude the recess 143 of the stopper 127 so that the shaft 123 in the axial direction relative to the stop 127 is blocked against displacement of the shaft 123 in the axial direction and through the recess of the stop 127 (ie shaft 123 and stop 127 form a releasable mechanical closure). For this purpose, the cross section 145 of the shaft 123 is reduced at the position between the ratchet teeth 139 relative to the cross section 141 at the position of the teeth (which is how the teeth 139 form). The cross section 145 is compared to the cross section 141 in particular reduced such that a corner of the circular segment-shaped cross-section 145 is removed from the cross section 141, in particular rounded. What appears in the cross-section as a corner is an edge on the shaft: between the raster teeth is thus a removal, in particular a rounding against which the adjacent teeth stand out. By turning the shaft 123 back and forth about its own axis, from the locking position, which is characterized by the teeth engaged on the stop, into the adjustment position, which is characterized by the in-line cross sections 141 and 145 of the shaft 123 and the shaft stop 127, be changed (Fig. 8 to Fig. 10).
    The shaft 123 is rotatably mounted at its first end about its axis on the guide rail 105 and on the bridge, in particular the cover plate 135 which leads to the guide rail 105. A concentric fastener (e.g., a bolt 133 or rivets) concentric with the axis of rotation of the shaft 123 is preferred. Thus, the rotation of the shaft 123 does not stop about its own axis, a bushing 131 is preferably placed around the shaft of the fastener (Fig. 3, Fig. 4).
    The rotation of the shaft 123 can be obtained via a lever arm 147. The lever arm 147 is expediently likewise arranged on the first end of the shaft 123 (FIGS. 8, 10). The lever arm 147 can preferably be activated via the actuating element 108. For this purpose, the actuator 108 is suitably biased against the guide rail 105, z. A first continuous slot 151 and a second slot 153 in the actuating element 108 at the same time allow the actuating element 108 to be attached to the lever arm 147 and the shaft 123, wherein the shaft is passed through the first slot 153 (FIG. 5) , Fig. 6). The elongated holes are arranged such that by actuation of the actuating element 108 by pressure against the compression spring 149, preferably in the direction of the compression spring axis, the lever arm 147 is moved, and thus the shaft 123 rotates about its axis. An expedient arrangement of the elongated holes 151 and 153 includes their mutually parallel alignment in the drilling direction and their mutually perpendicular orientation of the hole cross sections at their longest extent, the hole cross section of the first elongated hole 151 extends at the longest extent in the axial direction of the compression spring 149 and the hole cross sections of the second Long hole 153 extends at its longest extent perpendicular to the axial direction of the compression spring 149.
    To secure the extension against the shaft stop 127 has the shaft 123 as the last tooth opposite to the ratchet teeth 139 differently positioned final tooth 155 (Fig. 8). The final tooth 155 prevents in the aforementioned adjustment position of the shaft 123, the full extract (the unthreading) of the shaft 123 from the recess 143 of the stopper 127 (FIG. 7). So that the shaft 123 can be guided into the recess during assembly, the cross section 157 of the shaft 123 at the position of the closing tooth 155 corresponds to the cross section 141 of the shaft 123 at the position of the ratchet teeth 139, but is opposite to this about the axis of rotation of the shaft 123 twisted. So that the shaft 123 with the position between the last ratchet tooth 139 and the final tooth 155 in the recess 143 can be rotated sufficiently far about its axis, the cross section 159 is correspondingly reduced at the position between the last ratchet tooth 139 and the tail tooth 155 (FIG. 9).
    Advantageously, the shaft is made of plastic, in particular by injection molding. Injection molding is quick and inexpensive to manufacture.
    The outer contour of the stop 127 may be suitably T-shaped. The stopper 127 thereby has first and second concave corner regions 161 and 162 (FIG. 7). These corner regions allow for guidance through the guide rail 105 and, in particular, sliding on and along the rails 125 (Figure 11).
    The sliding element 129 preferably has a T-shaped outer contour in cross-section. The sliding element 129 thereby has a first and a second concave corner region 163 and 164, which extends over the entire extent of the length of the sliding element. These corner regions allow the sliding element 129 to be guided by the guide strip 105 and in particular to slide on and along the rails 125 (FIG. 11).
    The sliding element 129 further has a cylindrical recess 165. The recess 165 extends parallel to the longitudinal axis of the sliding element 129. Advantageously, the cross section of the recess 165 of the sliding element 129 is circular. The recess 165 forms, in particular, a tube for receiving and guiding the shaft 123. The sliding element 129 can be designed as a profile, in particular as a hollow profile. Due to the tubular recess 165 for receiving the shaft 123, which is relatively long (eg 8 to 20 cm, preferably 10 to 16 cm), the sliding element 129 can be designed as a relatively long, rod-shaped part (eg over 10 cm long, more preferably over 15 cm long).
    A long sliding element 129 offers a lot of space for mounting the holder 107, which is preferably designed as an angle. It is favorable if a plurality of fastening means, in particular screws 167, are used for the mutual fixing of sliding element 129 and holder 107.
    A long sliding element 129 has a long sliding surface which leads to stability in the armrest. In particular, this increased stability when supporting on the backrest and when adjusting the height leads to increased comfort.
    The stopper 127 is conveniently attached to the slider 129 (e.g., by bolting). Particularly suitably, the stop 127 is attached to the end face of a first end of the sliding member 129, in particular such that the recess 143 of the stopper 127 opens into the tubular recess 165 of the sliding member 129.
    At or near the second end of the sliding member 129 openings 169 are provided in the cross-sectional direction of the sliding member 129, which are provided for fastening means 167 for stably connecting slide member 129 and holder 107. For this purpose, the holder 107 corresponding to corresponding mounting structures (in particular threaded holes 119). The slider 129 may be made of solid material at the locations where the apertures 169 are provided (and before the apertures 169 are applied).
    The sliding element is advantageously made of metal or a hard and dimensionally stable plastic, more preferably made of aluminum. This material can be cast (casting). As a result, the manufacturing costs are kept low. In addition, the connection of the sliding element 129, in particular of an aluminum sliding element, with the holder 107, which is advantageously designed as an angle and, for reasons of stability, likewise made of metal, in particular of aluminum, results in an astonishing stability of the armrest. Despite a relatively long guide bar, which is necessary for the function of the height adjustment, the armrest is very stable, so no back-and-forth shaking of the armrest and thus the entire armrest occurs when using the inventive armrest.
    The upper end of the guide strip 105 is expediently formed with fastening structures 173 and 174 for attaching a cover part 135 (FIGS. 11, 12). The cover part can conveniently serve as a support for the armrest 101 and / or the shaft 123. Furthermore, the guide strip 105 may be formed with further structures, which allow the guide strip with a shell 103 to assemble into a housing. The lid part is advantageously designed such that it serves as a cover plate 135 for the entire housing. The housing preferably comprises or consists of guide rail 105 and shell 103. In this case, the shell 103 can be expediently also formed with fastening structures for attaching the cover part 135 (FIG. 12).
    The housing parts, shell 103 and / or guide strip 105, are preferably made of plastic, and / or are preferably equipped for stability with braces.
    While specific embodiments have been described above, it will be apparent that various combinations of the illustrated embodiments may be used so far as the embodiments are not mutually exclusive.
    While the invention has been described above with reference to specific embodiments, it is apparent that changes, modifications, variations, and combinations may be made without departing from the spirit of the invention.
    LIST OF REFERENCE NUMBERS:
    [0075]<Tb> 101 <September> armrest<Tb> 103 <September> Shell<Tb> 105 <September> guide rail<tb> 107 <SEP> Holder or armrest holder<tb> 108 <SEP> Actuating element, in particular button<Tb> 109 <September> bearing surface<tb> 111 <SEP> Long hole of the guide rail<tb> 113 <SEP> First leg of the holder<tb> 115 <SEP> Attachment structure on the first leg<tb> 116 <SEP> First connection area of the holder<tb> 117 <SEP> Second leg of the holder<tb> 118 <SEP> Second connection area of the holder<tb> 119 <SEP> Fastening structure on the second leg<Tb> 120 <September> Housing<Tb> 121 <September> recess<tb> 122 <SEP> projection, bridge structure<Tb> 123 <September> wave<Tb> 125 <September> Rails<Tb> 127 <September> shaft stop<Tb> 129 <September> hollow profile<Tb> 131 <September> bush<Tb> 133 <September> Bolt<Tb> 135 <September> cover plate<Tb> 137 <September> slide bracket<Tb> 138 <September> notch<Tb> 139 <September> Grid teeth<tb> 141 <SEP> Cross section of the shaft at the position of the ratchet teeth<tb> 143 <SEP> Opening notch<tb> 145 <SEP> Cross-section of the shaft at the position between the grid teeth<Tb> 147 <September> arm<tb> 149 <SEP> Compression spring (force member)<tb> 151 <SEP> First slot in the actuator<tb> 153 <SEP> Second slot in the actuator<Tb> 155 <September> Final tooth<tb> 157 <SEP> Cross-section of the shaft at the position of the final tooth<tb> 159 <SEP> Cross section of the shaft at the position between the last grid tooth and the final tooth<tb> 161 <SEP> First concave corner region of the stroke<tb> 162 <SEP> Second concave corner region of the stroke<tb> 163 <SEP> First concave corner region of the hollow section<tb> 164 <SEP> Second concave corner region of the hollow section<tb> 165 <SEP> Recess of the hollow section<Tb> 167 <September> fasteners<tb> 169 <SEP> Fastener breakthroughs<tb> 173 <SEP> Mounting structure on the guide rail<tb> 174 <SEP> Other mounting structure on the guide rail
    权利要求:
    Claims (26)
    [1]
    1. Height-adjustable armrest for a chair, especially an office chair, withAn armrest (101),A holder (107) for the armrest (101), which can be connected to a chair or fixed to a chair,- a mechanism for adjusting the height of the armrest (101) relative to the holder (107), the mechanism comprising at least two mutually displaceable parts, namely a first part (123) and a second part (127), wherein the first part (123) of the mechanism is connected to the armrest (101) and the second part (127) of the mechanism is connected to the holder (107), and- A housing (120) for shuttering the two mutually displaceable parts (123, 127),characterized in thatthe housing (103, 105) has a slot (111) through which a bridge structure (122) projects, by means of which the second part (127) of the mechanism is fastened to the holder (107).
    [2]
    2. Height-adjustable armrest according to claim 1, characterized in that the extension of the elongated hole and the displacement distance of the two mutually displaceable parts (123, 127) of the mechanism are coordinated such that upon actuation of the mechanism, the position of the armrest (101) relative to the Position of the holder (107) in the direction of extension of the slot (111) is adjustable.
    [3]
    3. Height-adjustable armrest according to one of the preceding claims 1 or 2, characterized in that the housing relative to the armrest (101) and / or against the first part (123) of the mechanism is fixable or fixed.
    [4]
    4. Height-adjustable armrest according to one of the preceding claims 1 to 3, characterized in that the housing (103, 105) forms a sleeve having a first end and a second end.
    [5]
    5. Height-adjustable armrest according to claim 4, characterized in that the housing (103, 105) consists of two mating parts, in particular a shell (103) and a guide strip (105), which are preferably movable into one another for mating in the direction of the longitudinal sleeve extension ,
    [6]
    6. Height-adjustable armrest according to one of the preceding claims 4 to 5, characterized in that the sleeve is formed closed at its first, the armrest (101) far end.
    [7]
    7. Height-adjustable armrest according to one of the preceding claims 4 to 6, characterized in that the sleeve has at its second end an opening which is covered by the armrest (101) or covered.
    [8]
    8. Height-adjustable armrest according to one of the preceding claims 4 to 7, characterized in that the slot (111) extends in the direction of the sleeve extension.
    [9]
    9. Height-adjustable armrest according to one of the preceding claims 4 to 8, characterized in that the guide strip (105) extends in the direction of the sleeve extension.
    [10]
    10. Height-adjustable armrest according to one of the preceding claims 4 to 9, characterized in that the slot (111) in the guide strip (105) is formed.
    [11]
    11. Height-adjustable armrest according to one of the preceding claims 4 to 10, characterized in that- The armrest (101) on its underside, the guide rail (105) and the first part of the mechanism (123), in particular a shaft (123), wherein the guide rail (105) is provided with a guide (125), the shaft (123) is axially rotatable and the guide (125) and the shaft (123) are aligned parallel to each other,- On the holder (107) of the second part of the mechanism (127), in particular a shaft stop (127) is fixed and- For height adjustment on the one hand, the position of the armrest (101) relative to the holder (107) is adjustable in that the guide bar (105) relative to the shaft stop (127) is displaceable, wherein the shaft (123) in a first rotational position along its Rotary axis in an opening (143) of the shaft stop (127) is displaceably guided, and on the other hand, the position of the armrest (101) relative to the holder (107) is formed lockable characterized in that the guide bar (105) relative to the holder (107) lockable is by the shaft (123) engages in a second rotational position in the shaft stop (127).
    [12]
    12. Height-adjustable armrest according to claim 11, characterized in that the shaft stop (127) is fixed terminally on a sliding element (129), which in turn is fixed to the holder (107), wherein the sliding element (129) is designed such that- The sliding element (129) and the guide strip (105) by means of the guide (125) are guided relative to each other displaceable and / or- The shaft (123) during the displacement in the axial direction and during the rotational movement in the sliding element (129) is guided.
    [13]
    13. Height-adjustable armrest according to claim 12, characterized in that the sliding element (129) has at least one inner and one outer sliding surface.
    [14]
    14. Height-adjustable armrest according to one of claims 12 or 13, characterized in that the sliding element (129) made of aluminum or plastic, preferably made of aluminum, is preferably manufactured in a casting process.
    [15]
    15. Height-adjustable armrest according to one of claims 12 to 14, characterized in that the sliding element (129) by slide rings or sliding clamps (137) is enclosed.
    [16]
    16. Height-adjustable armrest according to one of claims 11 to 15, characterized in that the shaft (123) has a sequence in the axial direction of spaced razor teeth (139).
    [17]
    17. height adjustable armrest according to one of claims 11 to 16, characterized in that the shaft (123) has a lever arm (147).
    [18]
    18. height adjustable armrest according to claim 17, characterized in that the lever arm (147) with respect to the sequence of the raster teeth (139) in the axial direction on the side of the armrest (101) is arranged.
    [19]
    19. Height-adjustable armrest according to one of claims 17 or 18, characterized in that the rotational position of the shaft (123) is adjusted by the lever arm (147) is moved via an actuating element (108) from a first position to a second position wherein the shaft (123) is guided from the second rotational position to the first rotational position.
    [20]
    20. Height-adjustable armrest according to claim 9, characterized in that the actuating element (108) biases the lever arm (147) by a force member (149) in the first position, whereby the shaft (123) is held in the second rotational position.
    [21]
    21. Height-adjustable armrest according to claim 20, characterized in that the force element (149) includes a compression spring.
    [22]
    22. Height-adjustable armrest according to one of claims 11 to 21, characterized in that the shaft (123) has a closing tooth (155) which is formed with respect to the alignment of the remaining teeth of the sequence such that in the first rotational position, the shaft (15 123) on the shaft stop (127), thereby defining a maximum height adjustment.
    [23]
    23. Height adjustable armrest according to one of claims 11 to 22, characterized in that the guide strip (105) together with the shell (103) forms a housing which the shaft (123) and the shaft stop (127) and insofar as the sliding element ( 129) at least longitudinally encloses substantially.
    [24]
    24. Height-adjustable armrest according to one of claims 11 to 23, characterized in that a cover plate (135) carries on its upper side the armrest (101) and on its underside, the guide strip (105) and the shaft (123) are attached.
    [25]
    Height-adjustable armrest according to claim 24, characterized in that the shaft is axially rotatably mounted on the cover plate (135), in particular by means of a fastening means (133) with head and shaft, e.g. a screw whose twistability relative to the cover plate (135) is ensured, e.g. by a sliding bush which is drawn between the cover plate (135) and the shaft (123) over the shaft of the fastening means (133).
    [26]
    26. Height-adjustable armrest according to one of claims 11 to 25, characterized in that the shaft (123) is made of plastic, preferably manufactured in a casting process, in particular in an injection molding process.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2019-02-28| AZW| Rejection (application)|
    优先权:
    申请号 | 申请日 | 专利标题
    CHCH159614|2014-10-17|DE102015219546.5A| DE102015219546A1|2014-10-17|2015-10-08|Height-adjustable armrest|
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