JP3637733B2 - Chair armrest device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an armrest device for a chair, and more particularly to an armrest device for a chair in which an armrest portion can be adjusted in height and laterally translated.
[0002]
[Prior art]
Conventionally, there has already been provided a chair whose armrest can be adjusted in height with respect to a support that rises from a seat or a leg. And as the height adjustment mechanism of the armrest part, the support part is configured to be extendable and contractable between the outer collar and the inner collar, and the engagement hole is formed at regular intervals in the vertical direction on the stationary casing, There are those that adjust the height in multiple steps by engaging and disengaging the engaging claws that appear and disappear from the housing of the housing, or those that adjust the armrest in a stepless manner with a gas cylinder arranged in the support portion. There is a structure in which an operating member that moves the engaging claw in and out or an operating member that controls the gas cylinder is interlocked with a lever arranged in or near the armrest.
[0003]
On the other hand, an armrest that can be adjusted in parallel translation with respect to the support has already been provided. And as a horizontal parallel movement adjustment mechanism of an armrest part, a movable member is piled up on a fixed member fixed to an upper end of a support part, and the movable member is moved along a guide rail extending in a lateral direction provided on each overlapping surface side. It can move laterally, holds the movable member in place with appropriate engagement means, and can adjust the distance between the left and right armrests. There is a structure provided in the part.
[0004]
In addition, there is an armrest that can be adjusted in height and adjusted in lateral translation. In this case, the height adjusting mechanism and the lateral parallel movement adjusting mechanism are completely independent mechanisms, and a lever for operating each is provided at or near the armrest. Therefore, when adjusting both the height and lateral position of the armrest, each lever must be operated, which is not only very troublesome, but also because the lever is exposed, the appearance There is also a problem that damages. Also, when adjusting the height and lateral position of the armrest, the arm ahead of the elbow must be separated from the armrest, so after adjustment, put the arm on the armrest and check the adjustment. It was necessary to adjust again if it was unwell. Or, since the adjustment was made with the hand opposite to the arm placed on the armrest, it was difficult to operate.
[0005]
[Problems to be solved by the invention]
In view of the above-mentioned situation, the present invention intends to solve the problem that a chair armrest device in which the armrest portion can be adjusted in height and can be adjusted in parallel translation is provided with a lever for adjusting the height and lateral position. In addition, it provides a chair armrest device that can adjust the height and lateral position of the armrest portion at the same time with a series of simple operations while the arm from the elbow is placed on the armrest portion. is there.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides an armrest device for a chair in which the height of the armrest portion can be adjusted with respect to the support portion standing up from the seat portion or the leg portion, and the lateral translation can be adjusted. A height adjusting mechanism that engages and holds the armrest portion at a predetermined height and disengages the engagement by displacement of the operation member, and is fixed to the fixing member fixed to the upper end of the support portion in the front-rear direction. A movable member having a width sufficiently wider than that of the member is overlapped from above and connected so as to be laterally movable, and the front-side engaging protrusions of the front and rear end portions of the fixed member and the front and rear end portions of the movable member are A plurality of rearward engagement recesses arranged in a straight line in a direction to be able to engage with each other, and an upper end portion of an operation member of the height adjustment mechanism is movable of the horizontal translation adjustment mechanism. Horizontal formed at the right place of the member Engage in the groove and move the armrest in the forward direction against the elastic biasing force to adjust the height and lateral position, and return it in the backward direction to set height and set lateral direction A chair armrest device was constructed that maintained the position.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 shows a chair according to the present invention, FIGS. 2 to 8 show the main part of an embodiment of the present invention, in which 1 is a leg of the chair, 2 is a seat, 3 is a backrest, 4 is An armrest device, 5 is a support portion, and 6 is an armrest portion.
[0008]
In the armrest device 4 according to the embodiment of the present invention, the armrest portion 6 is provided so that the height can be adjusted and the lateral translation can be adjusted or the horizontal swing can be adjusted with respect to the support portion 5 rising from the seat portion 2 or the leg portion 1. Is. The support portion 5 has a structure in which a hollow elevating body 8 is externally fitted on an upper portion of a support arm 7 fixed to the seat portion 2 so as to be vertically slidable. A height adjusting mechanism is provided between the support arm 7 and the lifting body 8 to adjust the height of the lifting body 8 with respect to the support arm 7 and to maintain the height. Further, a fixed member 9 constituting a lateral parallel movement adjusting mechanism is fixed to the upper end of the elevating body 8, and a movable member 10 also serving as reinforcement of the armrest portion 6 constituting the lateral parallel movement adjusting mechanism is provided. It is attached to the fixing member 9 so that the angle can be adjusted.
[0009]
First, the height adjusting mechanism of the armrest device 4 of the present invention will be described with reference to FIGS. A cylindrical support tube 11 having a rectangular cross section is fixed to the upper end of the support arm 7 constituting the support unit 5 so that the long side is oriented in the front-rear direction of the chair. A synthetic resin cap 12 is externally fitted. And the fixing member 9 is fixed to the upper end of the thick elongate plate-shaped elevating rod 13 constituting the elevating body 8, and the elevating rod 13 can be slid up and down in the sliding hole 14 formed in the central portion of the cap 12. And a synthetic resin slider 15 fitted to the lower end of the elevating rod 13 is inserted into the support tube 11 so as to be slidable up and down. Further, tension coil springs 16 and 16 are interposed in the support tube 11 between the cap 12 and the slider 15 at the position where the lifting rod 13 is sandwiched back and forth, and the lifting rod 13 is always raised. It is elastically biased to do. Specifically, the hook portions 16A and 16A at both ends of the tension coil spring 16 are locked to the locking portions 12A and 12A provided on the cap 12 and the locking portions 15A and 15A provided on the slider 15, respectively. .
[0010]
The height of the support tube 11 is adjusted so that the elevating rod 13 is engaged and held at a predetermined height position with respect to the support tube 11 and the height can be adjusted by disengaging the engagement member 17 by the displacement of the operation member 17. A vertical hole 18 is formed in the central portion of the side surface 11A and projecting inwardly over substantially the entire length in the vertical direction, and at the front edge of the vertical hole 18 at regular intervals. .. Are formed, and the central portion of the operating rod 20 constituting the operating member 17 is pivoted by the support shaft 21 at the upper and lower central portion of the side surface of the lifting rod 13 opposite to the engaging concave portion 19. The end portion of the engagement pin 24 that passes through the vertical hole 18 and the horizontal elongated hole 23 formed in the lower part of the lifting rod 13 in the downward U-shaped groove 22 formed at the lower end of the operation rod 20 Is located. The engaging pin 24 has a shaft portion 24A having a diameter slightly smaller than the width of the vertical hole 18 and has a head portion 24B that does not pass through the vertical hole 18 at one end and an outer periphery of the U-shaped groove 22 at the other end. A fitting groove 24 </ b> C is formed in which an E-ring 25 for stopping and retaining is fitted. Here, a working opening 26 for fitting an E-ring 25 to the engagement pin 24 is formed in the upper part of the other side surface 11B of the support tube 11. Further, an insertion hole 27 is formed in the cap 12 so as to be continuous with the sliding hole 14 so that the operation rod 20 can be inserted and the operation rod 20 can be displaced back and forth.
[0011]
Here, the support tube 11 is a cylindrical member having a rectangular cross section in the present embodiment, but is a cylindrical member having a substantially C-shaped cross section in which the working opening 26 of the other side surface 11B is formed in the entire length. May be. Further, the vertical hole 18 and the engagement recesses 19 are formed along the center of both side surfaces 11A and 11B of the cylindrical support tube 11 having a rectangular cross section, and the elevating rod 13 is substantially U-shaped in cross section. In the slit-like groove between the opposing plates, the same operating rod 20 is pivotably mounted, and the horizontally elongated holes 23 are formed in the opposing plates of the lifting / lowering rod 13 in the same manner as described above. The engagement pin 24 may be disposed through the vertical holes 18 and 18 and the horizontally long holes 23 and 23 and the U-shaped groove 22 of the operation rod 20. The support tube 11 is internally fitted and fixed to a rectangular tube portion at the upper end of the support arm 7.
[0012]
In this height adjustment mechanism, the upper end of the operating rod 20 as the operating member 17 is displaced back and forth, whereby the lower end is displaced back and forth around the support shaft 21 and engaged with the U-shaped groove 22. The joint pin 24 moves in the horizontally long hole 23, the height adjustment state (see FIG. 3) where the engagement pin 24 is located in the vertical hole 18, and the height maintenance state where the engagement pin 24 is engaged with the engagement recess 19. (See FIG. 2). Here, it is also preferable that the engagement pin 24 is elastically urged directly or indirectly by a spring body such as a kick spring in a direction in which the engagement pin 24 is engaged with the engagement recess 19.
[0013]
Next, a mechanism for adjusting the horizontal movement of the armrest 6 will be described with reference to FIGS. 2 to 5 and 8 to 10. The armrest portion 6 has a structure in which a movable member 10 having a width sufficiently wider than the fixed member 9 is overlapped from above on a fixed member 9 fixed to the upper end of the elevating rod 13 in the front-rear direction. The front and rear portions of the fixed member 9 and the movable member 10 can be engaged and disengaged. Specifically, the fixing member 9 has a protruding portion 28 that protrudes upward in a step shape at the rear portion, and a plurality of engaging protrusions 29 are arranged in parallel on the straight front edge of the protruding portion 28. A plurality of similar engagement protrusions 30 are arranged in parallel on the front edge of the straight line to form an opening 31 extending in the front-rear direction that penetrates the upper end of the operation rod 20. On the other hand, the movable member 10 has a recessed portion 32 that is recessed stepwise on the rear surface of the lower surface, and an engaging recessed portion 33 that engages the engaging protrusion 29 with a linear front edge of the recessed portion 32. Are formed at a predetermined interval, a protrusion 34 protruding downward in a step shape is formed on the front part of the lower surface, and an engagement recess that engages with the engagement protrusion 30 at the linear rear edge of the protrusion 34 35,... Are formed at predetermined intervals, and further, a horizontally long groove 36 for receiving the upper end portion of the operation rod 20 is formed. The projecting portion 34 is further extended downward, the lower portion thereof is extended rearward to receive the front portion of the fixing member 9, and the rear end of the recessed portion 32 is extended downward. If the lower part is extended forward and the rear part of the fixed member 9 is received, when the front part of the movable member 10 is lifted, the fixed member 9 is lifted together. However, an appropriate structure can be adopted for the vertical connection between the fixed member 9 and the movable member 10.
[0014]
Further, concave portions 37 and 38 are formed in the overlapping portions of the upper surface of the fixed member 9 and the lower surface of the movable member 10, respectively, and a tension coil spring 39 is disposed in the front-rear direction in the cavity formed by the concave portions 37 and 38. And the rear end of the tension coil spring 39 is engaged with a locking portion 40 provided at the rear end of the recess 37 of the fixed member 9, and the front end of the tension coil spring 39 is provided at the front end of the recess 38 of the movable member 10. The movable member 10 is elastically biased backward with respect to the fixed member 9. The concave portion 37 extends further forward than the concave portion 38, and the movable member 10 can be moved forward. The concave portions 37 and 38 have a sufficiently wide lateral width so that the movable member with respect to the fixed member 9 is movable. Ten horizontal and horizontal movements are possible.
[0015]
The movable member 10 is covered with a synthetic resin decorative cover 42 that forms the outer shape of the armrest portion 6, and the support tube 11 and the elevating rod 13 are divided into two parts whose upper ends are fixed to the fixing member 9. The decorative cover 43 is covered with a synthetic resin decorative cover 43, and a lower portion of the decorative cover 43 is slidably fitted to the upper portion of the support arm 7.
[0016]
Here, in a normal state, the movable member 10 is in the rearmost position by the elastic biasing force of the tension coil spring 39, and the rear and front engaging projections 29 and 30 of the fixed member 9 are in front of the movable member 10. It engages with one of the engaging recesses 33 and 35 at the rear and rear (see FIG. 2). When the movable member 10 is slid forward with respect to the fixed member 9 while pulling the tension coil spring 39, the engagement recesses 33 and 35 are detached from the engagement protrusions 29 and 30, and the fixed member 9 is moved. The movable member 10 can be moved laterally and parallelly, and after the lateral position of the movable member 10 is set to a predetermined position, the movable member 10 is slid back to the rear by the elastic biasing force of the tension coil spring 39 and engaged. The engagement recesses 33 and 35 are engaged with the protrusions 29 and 30, respectively, and the state is maintained. Further, when the armrest portion 6 (the decorative cover 42), that is, the movable member 10 is slid forward, the upper end portion of the operating rod 20 positioned in the laterally long groove 36 is pushed forward to center the support shaft 21. As a result, the lower end portion of the operating rod 20 moves rearward, and the engagement pin 24 is disengaged from the engagement recess 19 and positioned in the vertical hole 18 (see FIG. 3). In this state, by raising or lowering the armrest portion 6, that is, the front portion of the movable member 10, the elevation body 8 can be adjusted in the vertical height with respect to the support arm 7. When the armrest portion 6, that is, the movable member 10 is moved rearward by the elastic biasing force of the tension coil spring 39, the engagement protrusions 29, 30 are formed in any of the engagement recesses 33, 35. The set lateral direction position is maintained by engagement, and at the same time, the engagement pin 24 is engaged with any of the engagement recesses 19 to maintain the set height.
[0017]
In addition, the thing of the structure which moves the armrest part 6 back and cancels | releases the engagement of a height adjustment mechanism, when getting up from the state leaning on the backrest part 3, and also when standing up from a chair, 6 is accompanied by an operation of pulling 6 backward, and there is a possibility that the engagement may be unexpectedly released. Therefore, the armrest 6 is moved forward to engage the height adjustment mechanism and the lateral translation adjustment mechanism. A structure for releasing is preferable.
[0018]
【The invention's effect】
The armrest device for a chair according to the present invention as described above is a series of simple operations such as holding the armrests on both sides with the respective hands and sliding them forward while the arm on the armrest is placed on the armrest portion. The height of the part and the angle in the horizontal direction can be adjusted. For example, it can be set to the height of an armrest suitable for operating a word processor or a computer keyboard placed on a tabletop, and depending on the position of the elbow or the shoulder width of the seated person when operating the keyboard or mouse The lateral position of the armrest portion or the distance between the left and right armrest portions can be adjusted according to the size, and an easy support state of the arm from the elbow to the tip can be realized. In addition, since no lever for adjusting the height and lateral position is provided and the armrest itself can be used like a conventional operation lever, the appearance is excellent. Furthermore, since the height adjustment mechanism is simple, reliable, and highly durable, it is possible to provide an armrest device that can optimally adjust the posture of the armrest portion while suppressing an increase in cost.
[Brief description of the drawings]
FIG. 1 is a side view of a chair to which an armrest device of the present invention is applied.
FIG. 2 is a longitudinal sectional view of a main part of an armrest device according to an embodiment of the present invention.
FIG. 3 is a longitudinal sectional view of an essential part showing a state in which the height can be adjusted when the armrest is moved forward.
FIG. 4 is an exploded perspective view of the same.
FIG. 5 is a perspective view of the main part in the assembled state.
6 is a cross-sectional view taken along line X1-X1 of FIG.
7 is a cross-sectional view taken along line X2-X2 of FIG.
FIG. 8 is an abbreviated plan view of an armrest portion.
FIG. 9 is an abbreviated vertical sectional view.
FIG. 10 is an exploded perspective view, similarly omitted.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Leg part 2 Seat part 3 Backrest part 4 Armrest apparatus 5 Support part 6 Armrest part 7 Support arm 8 Elevating body 9 Fixing member 10 Tilt member 11 Support pipe (support arm) 12 Cap 13 Elevating rod (elevating body) 14 Sliding Hole 15 Slider 16 Tension coil spring 17 Operation member 18 Vertical hole 19 Engagement recess 20 Operation rod (operation member)
21 Support shaft 22 U-shaped groove 23 Horizontally long hole 24 Engagement pin 25 E-ring 26 Work opening 27 Insertion hole 28 Projection part 29 Engagement protrusion 30 Engagement protrusion 31 Opening 32 Recessed part 33 Engagement recessed part 34 Projection part 35 Engagement Concave part 36 Horizontal long groove 37 Concave part 38 Concave part 39 Tension coil spring 40 Locking part 41 Locking part 42 Decorative cover 43 Decorative cover

Claims (1)

An armrest device for a chair in which the armrest portion can be adjusted in height and laterally movable with respect to a support portion rising from a seat portion or a leg portion, and the armrest portion is engaged and held at a predetermined height on the support portion, and A height adjustment mechanism that disengages and disengages the engagement member by the displacement of the operation member, and a movable member having a width that is sufficiently wider than the fixed member from above is fixed to the fixed member that is fixed to the upper end of the support portion in the front-rear direction. A plurality of rearward engagements, which are connected to each other so as to be laterally movable, and are arranged in a straight line in the lateral direction on the front and rear end portions of the fixed member and the front and rear end portions of the movable member by the rear elastic biasing force of the movable member. It is equipped with a lateral parallel movement adjusting mechanism that can be engaged with each other at the mating recess, and the upper end portion of the operation member of the height adjusting mechanism is engaged in a laterally long groove formed at an appropriate position of the movable member of the lateral parallel movement adjusting mechanism. Let the armrest forward It is possible to adjust the height and lateral position by moving against the elastic biasing force, and to maintain the set height and the set lateral position by returning to the rear direction. Armrest device.

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