TWM527717U - Arm of chair - Google Patents

Description

Chair armrest

The present invention relates to an armrest, and more particularly to a chair armrest that can be horizontally adjusted.

A known chair has two armrests. In order to meet the needs of different users, some chair armrests are designed to adjust the front and rear position and the left and right position. Taking Taiwan Patent No. I353822 as an example, a horizontally adjustable seat armrest is provided, the structure comprising a base, a cover body, and a fixing device and an adjustment disposed between the base and the cover body. Pieces. Wherein, the fixing device comprises a sheet body having a plurality of tooth portions, a fixing piece having two rows of tooth portions, and two gears on the left and right sides of the fixing piece and meshing with the tooth portions of the fixing piece . The adjusting member mainly comprises two rows of teeth, wherein one row of teeth has a plurality of first tooth portions that can mesh with the tooth portions of the sheet body, and the other row of teeth has a plurality of teeth that can mesh with the gears. Two teeth. When the corresponding teeth are engaged with each other, the base and the cover are positioned to be unable to move. When the corresponding teeth are apart from each other and are not engaged, the user can hold and drive the base with the hand. The cover moves back and forth to the left and right to adjust the position.

That is to say, the patent achieves the function of adjusting the position of the handrail through the two teeth, the two gears, and the fixing piece having the tooth portion. The applicant of the present invention has the convenience of application in view of the adjustable position of the handrail, and the consumer has a large demand for this, so another armrest with different structure and different principle of action of the component is proposed.

Therefore, the purpose of the present invention is to provide a chair armrest that is structurally innovative and convenient to adjust the horizontal position.

Thus, the new chair armrest is adapted to be mounted on a handrail of a chair and includes a housing, a cassette unit, and a control unit.

The outer casing is movably mounted on the handrail bar and defines an accommodating space, the outer casing being controllable to switch between a positioning state and a non-positioning state, and being capable of being driven when the outer casing is in the non-positioning state And reciprocating relative to the grab bar in a first direction and reciprocating in a second direction different from the first direction. The cassette unit is mounted in the accommodating space, and includes a base through which the grab bar can be coupled, and two pivoting gears pivotally connected to the base and spaced along the first direction, each A pivoting gear has a swing arm portion that is pivotally connected to the base at one end, and a gear portion that is located at the other end of the swing arm portion and has a plurality of first protruding teeth.

The control unit includes a row of teeth on one side of the gear portions of the pivoting gears, the row of teeth having a plurality of second teeth that are adjacently aligned in the first direction and project toward the first teeth The control unit is drivable to move between a locked position and an unlocked position, and when the control unit is in the locked position, the second teeth of the row of teeth and the first of the pivoting gears a protruding tooth is engaged, the pivoting gear is fixed, the outer casing is in the positioning state, and when the control unit is in the unlocked position, the row of teeth is away from the pivoting gears, and the pivoting gears are pivotable, The housing is in the non-positioned state.

The effect of the present invention is that the housing can be switched between the positioning state and the non-positioning state by changing the meshing relationship between the teeth and the pivoting gears, and the pivoting gears are transmitted through the pivotable design. The outer casing can be freely moved in the non-position state, and the above structural innovation and component operation principle are also different from the conventional handrail. Moreover, when the position is adjusted, as long as the control unit is moved to the unlocked position, the position adjustment of the outer casing can be performed, which is very convenient to use.

Referring to Figures 1 to 4, an embodiment of the chair armrest of the present invention is adapted to be mounted on a handrail bar 1 of a chair, the handrail bar 1 having a mounting member 11 at the top, the mounting member 11 having a level The mounting wall 111 and a binding post 112 projecting upward from the mounting wall 111. The chair comprises a housing 2, a cassette unit 3, and a control unit 4.

The outer casing 2 is mounted on the top of the handrail bar 1, and the outer casing 2 of the present embodiment is assembled by abutting a plurality of casings 21. After the housings 21 are combined, the outer casing 2 includes a bottom wall 22, a top wall 23 spaced above the bottom wall 22 and capable of abutting a user's hand, and a bottom wall 22 coupled thereto. The periphery of the top wall 23 and the bottom wall 22 and the top wall 23 together define a surrounding wall 24 of the accommodating space 20. The bottom wall 22 extends in a first direction 51 and has a bottom mounting hole 221 extending from the bottom surface to the top surface and communicating with the accommodating space 20. The top wall 23 has two first sliding portions 231 spaced apart from each other and disposed on the bottom surface thereof. Each of the first sliding portions 231 is a groove extending in a second direction 52. In this embodiment, the second direction 52 is perpendicular to the first direction 51. The first direction 51 is a left-right direction, and the second direction 52 is a front-rear direction, but the implementation is not limited thereto. The surrounding wall 24 has a first surrounding wall section 241 and a second surrounding wall section 242 arranged in the second direction 52.

The cassette unit 3 is mounted on the accommodating space 20 and includes a guiding seat 31 disposed on the bottom wall 22 of the outer casing 2, and a base on the guiding seat 31 and connecting the handrail rod 1. 32, and two pivoting gears 33 pivotally connected to the base 32 and spaced apart in the first direction 51.

The guiding seat 31 includes a limiting slot 311 located at the center and recessed downward, a coupling hole 312 extending downward from the limiting slot 311 and communicating with the bottom mounting hole 221 of the outer casing 2, and two edges The first direction 51 is spaced apart from the guide grooves 313 on opposite sides of the limiting slot 311 . Each of the guiding slots 313 is a long slot extending longitudinally along the first direction 51. Each of the guiding slots 313 has a first slot end 314 adjacent to the other slot 313 and a second slot end 315 opposite the first slot end 314 and away from the other slot 313.

The base 32 is disposed in the limiting slot 311, and the base 32 and the guiding seat 31 are relatively displaced along the second direction 52. The pedestal 32 can be coupled to the bolster 1 via the coupling hole 312. Specifically, the coupling post 112 of the handrail 1 extends upwardly through the bottom mounting hole 221 and the coupling hole 312. The base 32 is inserted into the base 32, and the base 32 is lockedly coupled to the coupling post 112 by a screw 321 .

Referring to Figures 2, 4 and 5, each of the pivoting gears 33 has a swing arm portion 331 whose one end is pivotally coupled to the base 32, and a gear portion 332 at the other end of the swing arm portion 331. The gear portion 332 is disposed on each of the guiding grooves 313 and has a plurality of first protruding teeth 333, and a guiding post 334 extending downward and extending into the corresponding guiding groove 313. The guiding post 334 can move between the corresponding first slot end 314 and the second slot end 315 of the guiding slot 313.

The control unit 4 is mounted on the accommodating space 20 and includes a control member 41, a row of teeth 42 integrally connected to one side of the control member 41, and two left and right spaced elastic members 43.

Referring to FIGS. 2, 3, and 5, the control member 41 includes an extension wall 411 located in the accommodating space 20 and extending above the cassette unit 3, and a first wall extending from the extension wall 411 via the housing 2. The wall section 241 protrudes from the pressing wall 412 of the outer casing 2. The extension wall 411 has two second sliding portions 413 disposed on the top surface thereof and respectively coupled with the first sliding portions 231 of the top wall 23, and each of the second sliding portions 413 can be along the second The direction 52 is moved relative to the respective first sliding portion 231, so that the stroke of the control member 41 to move along the second direction 52 can be guided to prevent the control member 41 from shaking left and right.

The row of teeth 42 is connected to a side of the extending wall 411 of the control member 41 away from the pressing wall 412 and between the second surrounding wall section 242 of the outer casing 2 and the pivoting gears 33. The row of teeth 42 has a plurality of second teeth 421 located on the bottom surface and aligned along the first direction 51 and projecting toward the first teeth 333. The gear teeth 42 can be moved by the control member 41 to move in the second direction 52 to control the meshing relationship between the gear teeth 42 and the pivot gears 33 by the control member 41.

Each of the elastic members 43 is pressed between the pressing wall 412 of the control member 41 and the surrounding wall 24 of the outer casing 2, and is used for providing the control member 41 and the row of teeth 42 to the surrounding wall 24 The restoring force of the movement of the first surrounding wall section 241.

Referring to Figures 1, 5 and 6, when the present invention is used, the control unit 4 can be driven to move between a locked position as shown in Figure 5 and a non-locked position as shown in Figure 6, thereby enabling control of the housing 2 in a positional state. Convert between a non-located state. When the control unit 4 is in the locked position, the second protruding teeth 421 of the teeth 42 mesh with the first protruding teeth 333 of the pivoting gears 33, and because the elastic force of the elastic members 43 resists The control member 41 causes the gear teeth 42 to receive the force of the first surrounding wall segment 241 to fix the pivot gears 33. The pivot gears 33 cannot be pivoted, and the outer casing 2 is constrained to be positioned. In the positioned state, the outer casing 2 cannot move relative to the grab bar 1 at this time.

When the position of the outer casing 2 relative to the handrail 1 is adjusted, the pressing wall 412 of the control member 41 is pressed in the direction indicated by the arrow A in FIG. 5 to drive the tooth 42 toward the outer casing 2 in the second direction 52. The second wall section 242 is moved and the control unit 4 is in turn switched to the unlocked position of FIG. In the unlocked position, the first row of teeth 42 is away from the pivoting gears 33, the second teeth 421 are no longer engaged with the first teeth 333, and the outer casing 2 is switched to the non-positioning state and is free. Moving, the outer casing 2 can be driven to reciprocate in the first direction 51 relative to the grab bar 1 and can also reciprocate in the second direction 52.

Referring to Figures 6 and 7, in particular, in the operation of adjusting the horizontal position of the outer casing 2, the user can first hold the outer casing 2 by hand, press the control member 41 with a thumb and maintain the pressing action while at the same time The outer casing 2 is moved by hand. When the outer casing 2 is driven to move left and right in the first direction 51, the latch unit 3 as a whole is fixed.

Referring to Figures 1, 6, and 8, in addition, when the position of the outer casing 2 in the second direction 52 is adjusted, when the outer casing 2 moves along the second direction 52, the guiding seat 31 of the latch unit 3 will also Following the movement of the outer casing 2, the base 32 is coupled to the binding post 112 of the handrail bar 1, so that the base 32 is fixed to the handrail bar 1 and is stationary. Each of the pivoting gears 33 is pivotally connected to the base 32 by the end of the swinging arm portion 331. The guiding post 334 of the gear portion 332 extends into the guiding slot 313 of the guiding seat 31, so that the outer casing 2 is along the first When the two directions 52 move, each of the pivoting gears 33 pivots with its pivotal center at a position pivotally connected to the base 32, and its pivoting stroke is restricted and guided by the guide grooves 313. When the base 32 is adjacent to the first surrounding wall section 241 of the surrounding wall 24 of the outer casing 2, the guiding post 334 of each pivoting gear 33 is located at the corresponding guiding groove 313. The first slot end 314. When the outer casing 2 is moved in the second direction 52 to bring the base 32 close to the second surrounding wall section 242 of the surrounding wall 24 of the outer casing 2, as shown in FIG. 8, each of the pivoting gears 33 The guide post 334 is located at the corresponding second slot end 315 of the guide slot 313. When the outer casing 2 of the present invention is adjusted in position in the second direction 52, it can be moved and adjusted between the positions shown in Figs. 6 and 8.

Referring to FIG. 5, after the user moves the outer casing 2 along the first direction 51 and the second direction 52 to the appropriate position, the pressing force applied to the control member 41 can be released. The control member 41 and the row of teeth 42 is resisted by the elastic force of the elastic members 43 and is moved to the locked position of FIG. 5 in the direction of the first surrounding wall section 241 of the outer casing 2, so that the teeth 42 mesh with the pivot gears 33. The outer casing 2 is positioned at the appropriate position as described above.

In summary, by controlling the meshing relationship between the teeth 42 and the pivoting gears 33, the outer casing 2 can be switched between the positioning state and the non-positioning state, and the pivoting gears 33 are translatable. The design of the rotation enables the outer casing 2 to move. The structural innovation of the novel and the principle of component operation are also different from those of the prior art. In addition, as long as the control unit 4 is driven to move to the unlocked position, the position of the outer casing 2 can be freely adjusted, and the adjustment is very convenient.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

1‧‧‧Handrail
11‧‧‧Installation
111‧‧‧Installation wall
112‧‧‧ binding column
2‧‧‧ Shell
20‧‧‧ accommodating space
21‧‧‧ housing
22‧‧‧ bottom wall
221‧‧‧ bottom mounting hole
23‧‧‧ top wall
231‧‧‧First sliding part
24‧‧‧ wall
241‧‧‧First wall section
242‧‧‧Second wall section
3‧‧‧ cassette unit
31‧‧‧ Guide seat
311‧‧‧ Limit slot
312‧‧‧Combination hole
313‧‧‧ Guide slot
314‧‧‧ first slot end
315‧‧‧second slot end
32‧‧‧Base
321‧‧‧ screws
33‧‧‧ pivot gear
331‧‧‧Swing arm
332‧‧‧ Gear Department
333‧‧‧First teeth
334‧‧‧ Guide column
4‧‧‧Control unit
41‧‧‧Controls
411‧‧‧Extended wall
412‧‧‧ Pressing the wall
413‧‧‧Second sliding part
42‧‧‧ teeth
421‧‧‧Second teeth
43‧‧‧Flexible parts
51‧‧‧First direction
52‧‧‧second direction
A‧‧‧ arrow

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is an incomplete perspective view showing an embodiment of the present handrail and a handrail; FIG. FIG. 3 is a side elevational cross-sectional view of the embodiment; FIG. 4 is a top exploded view showing a latching unit of the embodiment; FIG. 5 is a top cross-sectional view of the embodiment. At the same time, a control unit of the embodiment is shown in a locked position; FIG. 6 is a top cross-sectional view similar to FIG. 5, showing that the control unit is in an unlocked position; FIG. 7 is a top cross-sectional view similar to FIG. A state in which a casing of the embodiment is moved in a first direction; and FIG. 8 is a top cross-sectional view similar to FIG. 6, showing a state in which the casing is moved in a second direction.

2‧‧‧ Shell

20‧‧‧ accommodating space

24‧‧‧ wall

241‧‧‧First wall section

242‧‧‧Second wall section

31‧‧‧ Guide seat

313‧‧‧ Guide slot

314‧‧‧ first slot end

315‧‧‧second slot end

32‧‧‧Base

321‧‧‧ screws

33‧‧‧ pivot gear

331‧‧‧Swing arm

332‧‧‧ Gear Department

333‧‧‧First teeth

334‧‧‧ Guide column

4‧‧‧Control unit

41‧‧‧Controls

411‧‧‧Extended wall

412‧‧‧ Pressing the wall

42‧‧‧ teeth

421‧‧‧Second teeth

43‧‧‧Flexible parts

51‧‧‧First direction

52‧‧‧second direction

A‧‧‧ arrow

Claims (8)

A chair armrest for mounting on a handrail bar of a chair and comprising: a casing movably mounted on the handrail bar and defining an accommodation space, the casing being controllable in one Converting between a positioning state and a non-positioning state, when the outer casing is in the non-positioning state, being driven to reciprocate relative to the handrail bar in a first direction and reciprocating in a second direction different from the first direction; a latching unit is mounted in the receiving space and includes a base through which the grab bar can be coupled, and two pivoting gears pivotally connected to the base and spaced along the first direction. Each of the pivoting gears has a swing arm portion pivotally connected to the base at one end, and a gear portion at the other end of the swing arm portion and having a plurality of first protruding teeth; and a control unit including a a row of teeth on one side of the gear portions of the pivoting gear, the row of teeth having a plurality of second teeth arranged in the first direction and protruding toward the first protruding teeth, the control unit being capable of being driven Moving between a locked position and an unlocked position, when the control unit is in the locked position, the second teeth of the tooth are engaged with the first teeth of the pivoting gears, The pivoting gear is fixed, and the outer casing is in the positioned state. When the control unit is in the unlocked position, the row of teeth is away from the pivoting gears, the pivoting gears are pivotable, and the outer casing is in the non-positioning state. The chair armrest according to claim 1, wherein the latch unit further includes a guide seat disposed in the accommodating space and movable in the second direction in synchronization with the outer casing, the guide seat comprising two a guiding groove arranged along the first direction, each guiding groove has a first groove end adjacent to the other guiding groove, and a second groove end opposite to the first groove end, the base is disposed on the guiding groove In the lead seat, the base and the guiding seat are relatively displaceable in the second direction, and the gear portion of each of the pivoting gears can be at the first slot end and the second slot end of the corresponding guiding slot Move between. The chair armrest of claim 2, wherein the outer casing comprises a bottom wall having a bottom mounting hole communicating with the receiving space, the guiding seat further comprising a base between the guiding slots and the base And a limiting hole extending from the limiting groove and communicating with the bottom mounting hole, and the base can connect the handrail rod to the bottom mounting hole via the coupling hole. The armrest of the chair of claim 2, wherein the gear portion of each of the pivoting gears further has a corresponding one of the guide slots and is movable to the first slot end and the second slot end Guide column between. The armrest of the chair of claim 4, wherein the outer casing includes a bottom wall and a top wall spaced apart from each other, and a bottom wall and a top wall of the top wall, and is common with the bottom wall and the top wall Defining a surrounding wall of the accommodating space, the surrounding wall having a first surrounding wall segment and a second surrounding wall segment spaced along the second direction, when the pedestal is adjacent to the first surrounding wall segment, each The guiding post of the pivoting gear is located at the corresponding first slot end of the guiding slot, and when the housing moves in the second direction to bring the base adjacent to the second surrounding wall segment, each of the pivoting gears The guide post is located at the corresponding second slot end of the guide slot. The chair armrest of claim 5, wherein the control unit further comprises a control member having an extension wall above the cassette unit and connecting the teeth, and a protrusion extending from the extension wall A pressing wall of the outer casing is pressed, and the pressing wall is pressed to move the tooth in the second direction toward the second surrounding wall segment, so that the row of teeth is away from the pivoting gears. The chair armrest of claim 6, wherein the control unit further comprises an elastic member pressed against the pressing wall of the control member and the surrounding wall of the outer casing, the elastic member for providing the control And a restoring force of the teeth moving in a direction toward the first wall segment. The armrest of the chair of claim 1, wherein the control unit further comprises a control member mounted on the outer casing with an elastic restoring force, the control member having an extension located in the receiving space and connecting the teeth a wall, and a pressing wall projecting from the extending wall to the outer casing, the control member capable of moving the tooth in the second direction to control the meshing relationship between the tooth and the pivoting gear.