JPH10313972A - Armrest device for chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an armrest device for a chair which dispenses with any adjustment lever and simultaneously adjusts the height and the angle of the armrest part by a series of simple operation. SOLUTION: A support part 5 is formed by a support arm 7 and an elevating body 8 and an elevating rod 13 constituting the elevating body 8 fixed to a fixed part of an armrest part is arranged in a support tube 11 so as to be moved vertically and elastically energized upward. A vertical hole 18 is formed in the support tube 11, engagement recess parts 19 are formed in its front edge at fixed intervals, the central part of an operating rod 20 constituting an operating member is pivotally mounted on the top/bottom central parts of the elevating rod 13, a height adjustment mechanism having an engagement pin 24, which is penetrated through the vertical hole and a long-sideway hole 23 formed in the bottom of the elevating rod 13 and engaged with the engagement recess part 19, loosely fitted to the bottom end of the operating rod 20 is provided, and the armrest part provided on the top end of the support part is engaged and held at a prescribed angle. An angle adjustment mechanism which releases the engagement by moving the armrest part in the front direction against the elastic energizing force is provided and the operating member of the height adjustment mechanism is linked with the moving part of the angle adjusting mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field 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 can be adjusted in height and angle.

[0002]

2. Description of the Related Art Heretofore, there have been provided chairs in which an armrest can be adjusted in height with respect to a supporting portion rising from a seat or a leg. As the height adjustment mechanism of the armrest portion, the support portion is configured to be extendable and retractable with the outer rod and the inner rod, and the fixed side rod is formed with engagement holes at regular intervals in the vertical direction, and the movable side The height of which is adjusted in multiple steps by engaging and disengaging an engaging claw that protrudes and disappears from the rod,
Alternatively, there is a type in which the height of the armrest is adjusted steplessly by a gas cylinder disposed in the support, and an operation member for operating the engaging claw or operating the gas cylinder is disposed inside or near the armrest. There is a structure that is linked to the lever that has been set.

[0003] On the other hand, there has already been provided one in which an armrest can be adjusted in angle with respect to a support. As the angle adjusting mechanism of the armrest, the central portion of the armrest is pivotally attached to the upper end of the support so as to be tiltable, and a plurality of engagement recesses are formed at predetermined intervals in the front and rear ends of the support. In addition, there is a type in which a projection protruding from one of front and rear ends of an armrest is elastically fitted into the engagement recess to adjust the angle, and a structure or a lever for operating the armrest is provided on the armrest. Exists.

Some armrests are adjustable in height and angle in some cases. in this case,
The height adjustment mechanism and the angle adjustment mechanism are completely independent mechanisms, and a lever for operating each of them is provided at or near the armrest. Therefore, when adjusting both the height and the angle of the armrest, each lever must be operated, and the operation is not only troublesome but also impairs the appearance because the lever is exposed. There is also a problem. In addition, when adjusting the height and angle of the armrest, the arm beyond the elbow must be separated from the armrest, so after adjustment, put the arm on the armrest and check the adjustment condition, If bad, it had to be adjusted again. Alternatively, since the adjustment was performed with the hand on the opposite side of the arm on the armrest, the operation was impossible.

[0005]

SUMMARY OF THE INVENTION In view of the above situation, an object of the present invention is to provide an armrest device for a chair in which the height of the armrest is adjustable and the angle thereof is adjustable. The armrest device of a chair that can adjust the height and angle of the armrest portion simultaneously with a series of simple operations while keeping the arm from the elbow on the armrest portion without providing any lever of Is to do.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an armrest device for a chair in which an armrest is adjustable in height and angle with respect to a support rising from a seat or a leg. The support portion is formed of a support arm and an elevating body so as to engage and hold the armrest portion at a predetermined height on the support portion and disengage the engagement by the displacement of the operation member. A lifting rod, which constitutes an elevating body fixed to a fixed portion of the armrest portion, is disposed within the supporting pipe so as to be vertically movable and elastically urged upward, and a vertical hole is formed along the center of the side surface of the supporting pipe; Engaging recesses are formed at regular intervals at the front edge of the vertical hole, and the central portion of the operating rod constituting the operating member is pivotally attached to the upper and lower central portions of the elevating rod by a support shaft. An engagement pin that penetrates a horizontally long hole formed in a lower portion of the lifting rod and is engageable with the engagement recess. In addition to a height adjusting mechanism loosely fitted to the lower end of the operating rod, an armrest provided at the upper end of the support is engaged and held at a predetermined angle, and the armrest is opposed to an elastic urging force in a forward direction. An angle adjustment mechanism that releases the engagement by moving the arm adjustment part to a moving part of the angle adjustment mechanism, and moving the armrest part forward to adjust the height. An armrest device for a chair is provided which can adjust the angle and return to the backward direction to maintain the set height and the set angle.

In addition, a cap made of synthetic resin is externally fitted to the upper end of the support tube, and the lifting rod is vertically slidably fitted into a sliding hole formed in the center of the cap.
A slider made of synthetic resin fitted to the lower end of the elevating rod is slidably inserted into the support tube up and down, and a tension coil spring is interposed between the cap and the slider in the support tube, so that the elevating rod always rises. It is preferable that the elastic member is elastically biased so as to perform the operation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 main parts of an embodiment of the present invention,
In the figure, 1 is a leg of a chair, 2 is a seat, 3 is a backrest, 4 is an armrest device, 5 is a support, and 6 is an armrest.

The armrest device 4 according to the embodiment of the present invention comprises:
An armrest 6 is provided so as to be height-adjustable and angle-adjustable with respect to a support 5 rising from the seat 2 or the leg 1. The support portion 5 has a structure in which a hollow elevating body 8 is externally slidable up and down on a support arm 7 fixed to the seat 2. A height adjusting mechanism is provided between the support arm 7 and the elevating body 8 to adjust the height of the elevating body 8 with respect to the supporting arm 7 and maintain the height. A fixing member 9 constituting an angle adjusting mechanism is fixed to the upper end of the elevating body 8, and a tilting member 10 also serving as a reinforcement for the armrest 6 constituting the angle adjusting mechanism is fixed to the fixing member 9 as well. It is installed so that the angle can be adjusted.

First, a height adjusting mechanism of the armrest device 4 of the present invention will be described with reference to FIGS. A tubular support tube 11 having a rectangular cross section is fixed to the upper end of the support arm 7 constituting the support portion 5 so that the long side is oriented in the front-rear direction of the chair. A cap 12 made of synthetic resin is externally fitted. A fixing member 9 is fixed to the upper end of a thick and long plate-like elevating rod 13 constituting the elevating body 8, and the elevating rod 13 can be slid up and down into a sliding hole 14 formed in the center of the cap 12. And a slider 15 made of synthetic resin fitted to the lower end of the elevating rod 13 is slidably inserted into the support tube 11 so as to be vertically slidable.
Further, inside the support tube 11, the cap 1
Between the slider 2 and the slider 15, tension coil springs 16, 16 are interposed at positions sandwiching the elevating rod 13 back and forth, and are constantly biased so that the elevating rod 13 is raised. Specifically, locking portions 12A, 12A provided on the cap 12,
Hook portions 16A, 1 at both ends of a tension coil spring 16 are respectively attached to locking portions 15A, 15A provided on the slider 15.
6A is locked.

The lifting rod 1 is moved with respect to the support tube 11.
3 is a central portion of one long side surface 11A of the support tube 11 for engaging and holding the support tube 3 at a predetermined height position and disengaging the engagement by the displacement of the operation member 17 so that the height can be adjusted. ,
A vertical hole 18 is formed in a vertical direction along a convex base 11C which is formed to protrude inward over substantially the entire length.
8 are formed at regular intervals on the front edge of the operating rod 8, and the operating rod 20 which constitutes the operating member 17 is formed at the upper and lower central part of the side surface of the elevating rod 13 opposite to the engaging concave part 19. A central portion is pivotally mounted on a support shaft 21, and a horizontally elongated hole 23 penetrating the vertical hole 18 and formed at a lower portion of the elevating rod 13 is formed in a downward U-shaped groove 22 formed at a lower end of the operating rod 20. The end of the penetrating engaging pin 24 is located. This engagement pin 2
4, the diameter of the shaft portion 24A is slightly smaller than the horizontal width of the vertical hole 18, has a head portion 24B at one end that does not pass through the vertical hole 18, and abuts on the outer periphery of the U-shaped groove 22 at the other end. A fitting groove 24C for fitting an E-ring 25 for retaining is formed. Here, a work opening 26 for fitting the 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. Also,
An insertion hole 27 is formed in the cap 12 so as to be continuous with the slide hole 14 so that the operation rod 20 can be inserted therethrough and the operation rod 20 can be moved back and forth.

In this embodiment, the support tube 11 has a tubular shape with a rectangular cross section in the present embodiment, but the other side surface 11B
May be a cylindrical member having a substantially C-shaped cross section and formed over the entire length. The vertical hole 18 and the engaging 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. The operation rod 20 similar to the above is rotatably mounted in a slit-like groove between the two opposing plates, and a horizontally elongated hole 23 is formed in both opposing plates of the elevating rod 13 in the same manner as described above. The engagement pin 24 may be provided so as to pass through the vertical holes 18, 18, the horizontally long holes 23, 23 and the U-shaped groove 22 of the operation rod 20. In addition, the support tube 11 is fitted and fixed inside a rectangular tube at the upper end of the support arm 7.

In this height adjusting mechanism, the upper end of the operating rod 20 as the operating member 17 is displaced back and forth, so that the lower end is displaced upside down about the support shaft 21 and engages with the U-shaped groove 22. The engaged engagement pin 24 moves in the horizontally long hole 23, and the engagement pin 24 is positioned in the vertical hole 18 and can be adjusted in height (see FIG. 3). The maintenance state (see FIG. 2) is realized.
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 engages with the engagement recess 19.

Next, the angle adjusting mechanism of the armrest 6 is shown in FIGS.
A description will be given based on FIGS. The fixing member 9 fixed to the upper end of the elevating rod 13 is a member having a substantially U-shaped cross section that is open downward and has support plates 29 on both sides of a substrate 28 serving as an upper surface.
29, a fixing hole 30 is formed at one end of the substrate 28 for receiving and welding the upper end of the elevating rod 13;
In addition, elongated holes 31, 31 rising slightly forward are formed at the rear portions of both support plates 29, 29, and slightly laterally elongated through holes 32, 32 are formed at the front portion on the extension of the elongated holes 31. . The tilting member 10, which also serves as a reinforcing member for the armrest portion 6, connects the upper front and rear edges of both holding plates 33, 33 to the connecting plate 3.
The fixing member 9 can be accommodated between the holding plates 33, 33 in a shape continuous with the holding plates 33, 33, and shaft holes 35, 35 are formed near the rear portions of the holding plates 33, 33. In addition, an arc hole 36 having an arc centered on the shaft hole 35 is formed near the front portion, and an engagement groove 37 extending radially around the shaft hole 35 is formed at the front edge of the arc hole 36. ,
.. Are formed, and in this embodiment, four are formed above and below.

Then, the fixing member 9 is connected to the tilting member 1.
0, the shaft hole 35,
The support shaft 38 penetrates through the support shaft 38 through the slots 35 and the long holes 31 and 31 of the tilting member 10, and is connected to each other by taking appropriate retaining means, and the arc holes 36 and 36 or the engagement grooves 37 and 37 and the through holes 32 are provided. , 32 penetrate through the engagement shaft 39 and are similarly connected to each other by taking appropriate retaining means. The tilting member 1
A tension coil spring 41 is interposed between the engagement shaft 39 and the engagement pin 40 provided between the front ends of the two holding plates 33 and 33 and forward of the engagement groove 37. Thus, the tilting member 10 is elastically urged rearward with respect to the fixing member 9.

Further, one holding plate 3 of the tilting member 10
A pair of pins 42, 42 are provided at the center of the arm 3 at a predetermined interval inward in the front-rear direction of the armrest 6, and the upper end of the operating rod 20 is located between the pins 42, 42. Is located. A notch 43 is formed in the lower edge of one support plate 29 of the fixing member 9 corresponding to the pins 42, 42, so that the pins 42 can be moved back and forth. The tilting member 10 is covered with a decorative cover 44 made of a synthetic resin forming 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 4 is covered with a synthetic resin decorative cover 45.
Reference numeral 5 denotes a lower portion which is slidably fitted to an upper portion of the support arm 7.

In this embodiment, the fixing member 9 has a downward U-shaped cross section, and is structured to be accommodated inside the tilting member 10. However, the fixing member 9 has an upward U-shaped cross section. 9, the tilting member 10 is housed inside,
The shaft holes 35, 35 are connected to both support plates 29, 29 of the fixing member 9.
And the elongated holes 31, 31 are tilted
0 may be formed on both holding plates 33, 33. in this case,
Further, a pair of pins 42, 42 are protruded from the tilting member 10, and instead of receiving the upper end of the operation rod 20 between the pins 42, 42, the operation pins are mounted on the two holding plates 33, 33 of the tilting member 10. While holding through, the substrate 28 of the fixing member 9
The operation pin may be inserted into a vertically long hole formed in the upper part of the operation rod 20 passing through the opening, and the operation rod 20 may be tilted about the support shaft 21 as the tilting member 10 moves forward.
The upper end of the lifting rod 13 may be welded to the lower surface of the substrate 28 located at the lower end of the fixing member 9.

Here, in a normal state, the tilting member 10 is located at the most rearward position by the elastic biasing force of the tension coil spring 41, and the support shaft 38 is located at the rear end of the elongated hole 31. The engagement shaft 39 is located at the front end of the engagement groove 37 (see FIG. 2). When the armrest 6, that is, the tilting member 10 is moved forward against the elastic biasing force of the tension coil spring 41, the support shaft 38 fixed to the tilting member 10 moves along the long hole 31 of the fixing member 9. And the engaging groove 37 slides forward with respect to the engaging shaft 39 whose movement amount is regulated by the through hole 32 of the fixing member 9, and the engaging shaft 39 (See FIG. 3). As the tilting member 10 moves forward, the upper end of the operating rod 20 located between the pins 42 is pushed forward and the lower end of the operating rod 20 is The engagement pin 24 moves rearward, and is disengaged from the engagement recess 19 to be positioned in the vertical hole 18 (see FIG. 3). In this state, the vertical angle of the armrest 6 with respect to the support shaft 38 can be adjusted by raising or lowering the armrest 6, that is, the front part of the tilting member 10. The height of the lifting body 8 can be adjusted with respect to the armrest 6.
Is set to a predetermined angle and a predetermined height, and then the armrest portion 6, that is, the tilting member 10 is moved rearward by the elastic biasing force of the tension coil spring 41, the engaging shaft 37 At the same time as the engagement angle is maintained by the engagement of the engagement pins 39, the engagement pins 24 are engaged with any of the engagement recesses 19, and the set height is maintained.

The structure in which the armrest 6 is moved rearward to release the engagement of the height adjusting mechanism can be used when the user rests on the backrest 3 and rises from a chair. , Since it involves the action of pulling the armrest portion 6 rearward with force, there is a possibility that the engagement is suddenly released,
For this reason, it is preferable that the armrest 6 is moved forward to release the engagement of the height adjustment mechanism and the angle adjustment mechanism.

[0020]

The armrest device for a chair according to the present invention as described above comprises a series of steps in which the arm from the elbow is placed on the armrest and the armrests on both sides are slid forward with each hand. The height and angle of the armrest can be adjusted with a simple operation. For example, when operating the keyboard of a word processor or personal computer placed on a desk top, set the height of the armrests to approximately the same height as the desk top, and place the upper front end of the armrests in front of the desk top. Even if the wrist part is easily supported by connecting to the rim, the optimum distance from the shoulder to the elbow can be ensured by setting the angle of the armrest. In addition, the armrest itself can be used like a conventional operation lever without providing any lever for adjusting the height and angle, so that the appearance is also excellent. Furthermore, since the height adjusting mechanism is simple, highly reliable and has a highly durable structure, it is possible to provide an armrest device capable of optimally adjusting 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 the armrest device according to the embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a main part showing a state in which the height of the armrest can be adjusted by moving the armrest forward;

FIG. 4 is an exploded perspective view of the same.

FIG. 5 is a perspective view of a main part in an assembled state.

FIG. 6 is a sectional view taken along line X1-X1 of FIG. 2;

FIG. 7 is a sectional view taken along line X2-X2 of FIG. 2;

FIG. 8 is an abbreviated cross-sectional view of an armrest.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Leg part 2 Seat part 3 Backrest part 4 Armrest device 5 Support part 6 Armrest part 7 Support arm 8 Elevating body 9 Fixed member 10 Tilting 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 Horizontal oblong hole 24 Engagement pin 25 E-ring 26 Work opening 27 Insertion hole 28 Substrate 29 support plate 30 fixing hole 31 long hole 32 through hole 33 holding plate 34 connecting plate 35 shaft hole 36 arc hole 37 engaging groove 38 support shaft 39 engaging shaft 40 locking pin 41 tension coil spring 42 pin 43 cutout portion 44 makeup Cover 45 Makeup cover (elevator)

Claims (2)

[Claims] 1. An armrest device for a chair in which an armrest is adjustable in height and angle with respect to a support part rising from a seat or a leg, wherein the armrest is engaged with the support part at a predetermined height. In order to hold and disengage the engagement by the displacement of the operation member, a supporting portion is formed by a supporting arm and a lifting / lowering body, and a lifting / lowering body fixed to a fixed portion of an armrest portion in a supporting pipe provided at an upper end portion of the supporting arm. The vertically movable rod is vertically movable and elastically urged upward, and a vertical hole is formed along the center of the side surface of the support tube, and engagement recesses are formed at regular intervals at the front edge of the vertical hole. A central portion of the operating rod constituting the operating member is pivotally connected to a vertical central portion of the lifting rod by a support shaft, and penetrates and engages with the vertical hole and a horizontally long hole formed at a lower portion of the lifting rod. A height adjusting mechanism is provided, in which an engaging pin engageable with the concave portion is loosely fitted to the lower end of the operating rod. And an angle adjustment mechanism for engaging and holding the armrest provided at the upper end of the support at a predetermined angle and releasing the engagement by moving the armrest in the forward direction against the elastic urging force, The operation member of the height adjustment mechanism is linked to the moving part of the angle adjustment mechanism, and the height adjustment and the angle adjustment can be performed by moving the armrest portion in the forward direction, and the set height can be adjusted by returning the armrest in the rear direction. An armrest device for a chair, characterized by maintaining a predetermined angle. 2. A cap made of a synthetic resin is externally fitted to the upper end of the support tube, and the lifting rod is vertically slidably fitted into a sliding hole formed in the center of the cap. A slider made of synthetic resin fitted to the lower end is slidably inserted into the support tube in a vertically slidable manner, and a tension coil spring is interposed between the cap and the slider in the support tube, and is elastic so that the elevating rod always rises. 2. The armrest device for a chair according to claim 1, wherein the armrest device is biased.