JPH0718652U - Chair armrest device - Google Patents

Abstract

(57) [Summary] [Purpose] The chair armrest can be adjusted freely and steplessly so that it can maintain a working / resting posture suitable for the user. [Structure] In a chair 1 provided with a seat portion 3 and a backrest 4 on an upper portion of a leg 2 and armrests 6 on both sides of the seat portion 3 via support frame 5, at a front end of the support frame 5. ,
A front end of the armrest 6 is pivotally attached by a pin 7, and the armrest 6 is provided with a gas spring 8 that allows the free end to be vertically moved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an office chair, and more particularly to a chair armrest device for a chair in which the inclination angle of the armrest can be adjusted steplessly.

[0002]

[Prior art]

 The office chairs that have been used so far are designed so that the vertical height can be adjusted and the seat and backrest can be tilted at an appropriate angle to accommodate the desired posture of the seated person. .

[0003]

[Problems to be solved by the device]

 However, since the armrests have traditionally been fixed or moved by moving in parallel in the vertical direction, the armrests cannot be adjusted to the optimum posture during both work and rest, making it a chair for all. However, because the position of the elbow when sitting on the seat differs depending on the physical constitution of the person who uses it, the work position, or the resting posture, it was not an armrest suitable for all people.

In view of the above, the present invention is a chair in which the tilt angle of the armrest of the chair can be freely and easily adjusted in a stepless manner so that a working / resting posture can be maintained corresponding to a user. The purpose of the present invention is to provide an armrest device of the present invention and solve the drawbacks of the prior art.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, claim 1 of the present invention provides a chair having a seat portion and a backrest at the upper part of the leg, and an armrest on both sides of the seat portion through supporting frames. The front end of the armrest is pivotally attached to the front end of the armrest by a pin so that the armrest can be pivoted in the vertical direction, and the armrest is provided with urging means for vertically moving the free end. In claim 1, the biasing means is constituted by a gas spring, and in claim 3, the biasing means is constituted by a coil spring in claim 1.

[0006]

[Action]

 According to the above configuration, since the inclination angle of the armrest can be freely adjusted, it is possible to set an appropriate elbow angle regardless of the physical constitution of the sitting person or the sitting posture.

[0007]

【Example】

 Hereinafter, the present invention will be described with reference to the embodiments shown in FIGS. The chair armrest device according to the present invention is provided with a seat portion 3 and a backrest 4 on an upper portion of a leg 2 as shown in FIGS. 1 to 6, and a supporting frame 5 is provided on both sides of the seat portion 3. A chair 1 provided with an armrest 6, in which a front end of the armrest 6 is pivotally attached to a front end of the support frame 5 by a pin 7 in a vertically rotatable manner, and the armrest 6 has a free end 6a. Is provided with a gas spring 8 as an urging means capable of moving up and down.

As shown in FIG. 2, the front end of the support frame 5 which is a mounting portion to the armrest 6 is located above the frame base, and the armrest 6 is directed downward at this portion. The front end is pivotally attached by a pin 7, so that the free end 6a of the armrest 6 can be rotated in the vertical direction with respect to the support frame 5 with the pin 7 as a fulcrum. In the embodiment shown in FIG. 1, the urging means for supporting the lowering of the armrest 6 is composed of a gas spring 8 for vertically moving up and down, and the rod upper end 8a has a round bar shape as shown in an exploded view in FIG. It is fixed at a right angle to and is formed so that it can always project by extension. The rod upper end 8a is rotatably attached to the armrest 6. The lower end is connected by a pin 9 and a bracket 9 fixed to the upper surface near the base of the support frame 5.

Below the armrest 6, there is provided a lever lever 11 of a proper length which comes into contact with the upper end 8a of the gas spring and is pressed by one end and whose front end is located above the front end of the support frame 5. The fulcrum 12 pinned to the armrest 6 can be rotated. Therefore, when the operation lever 11 is rotated, the upper end 8a of the gas spring can be projected and retracted by that amount. The upper surface between the front end of the armrest 6 and the free end 6a is formed into a convex curved surface.

Next, the operation will be described. FIG. 4 shows a tilted state of the armrest 6 which is rotated by a person sitting on the seat 3 manually operating the operation lever 11. (a) shows a state in which the free end 6a is lowered ( , The gas spring 8 is contracted most, (b) is horizontal (the gas spring 8 is slightly extended at this time), and (c) is the free end 6a is raised (the gas spring 8 is most extended). Becomes That is, in a specific case, for example, in the case of working posture, the elbow of a sitting person abuts on the raised free end 6a of the armrest 6 as shown in FIG. Become. Also, in the resting posture, the sitting person's wrist is lowered to the front part of the lowered armrest 6 as shown in FIG. 6 to provide a comfortable posture when resting. It should be noted that when the armrest 6 is horizontal, it is exactly the same as in the case of the conventional fixed armrest. The method of locking at each position can be done by opening and closing the gas valve, and there is an advantage that the operation lever 11 is located at the front of the elbow and easy to operate.

7 and 8 show an embodiment in the case of claim 3 of the present invention. In FIG. 2, the gas spring 8 is used as the urging means, whereas the coil spring 13 is used. The difference is in the points used. In this case, the coil spring 13 is integrated with a sliding yoke 14 provided below the armrest 6 '. The yoke 14, the frame 15 on the armrest 6'side, the link 16 provided between the support frame 5 and the armrest 6'to prevent the armrest 6'from descending, and the locking lever. Pins 18 and 17 are connected to each other, and a long hole 19 is provided in a member on the frame 15 side that serves as a guide when the yoke 14 slides. The locking lever 17 and a part of the pin 18 are connected by a screw. In the figure, 20 is a spring guide integrated with the yoke 14.

FIG. 8 shows the state in which the free end 6a ′ is raised from the solid line (same as FIG. 7) as shown by the chain double-dashed line. Contract. Then, by rotating the locking lever 17 a half turn to tighten the frame 15 of the armrest 6'from the side of the yoke 14, the movement (expansion) of the coil spring 13 is prevented and the coil spring 13 is fixed at that position. . Further, the coil spring method has an advantage that it is cheaper than the gas spring method in terms of cost. In this case, the work posture and the rest posture are the same as those shown in FIGS.

[0013]

[Effect of device]

 As described above, the present invention relates to a chair having a seat portion and a backrest on the upper part of the leg and armrests on both sides of the seat portion via the support frames, and the front end of the support frame. In addition, since the front end of the armrest is pivotally attached by a pin and the armrest is provided with a biasing means that allows the free end to be moved up and down, the angle of the elbow of the chair can be freely set, and various arm angles can be set. It can be used by a person with a physique as the most suitable form for various corresponding postures.

[Brief description of drawings]

1 shows the appearance of a chair equipped with an armrest device according to claims 1 and 2 of the present invention, (a) is a front view, (b) is a side view, (c) is a plan view,

2 shows an embodiment of the armrest device of FIG. 1, (a) is a side view, (b) is an AA sectional view of (a), (c) is a BB sectional view of (a). , (D) is a sectional view taken along line CC of (a),

FIG. 3 is an exploded perspective view of the same.

4 shows a tilted state of the armrest device of FIG. 2, (a) is a rearwardly tilted state, (b) is a horizontal state, (c) is a frontal tilted side view,

FIG. 5 is a side view of the chair in FIG. 4 in a work posture,

6 is a side view of the chair of FIG. 4 in a resting posture,

FIG. 7 shows an embodiment of a chair armrest device according to claim 3 of the present invention, wherein (a) is a side view and (b) is (D) of (a).
-D sectional view,

8 is a tilting state diagram of FIG. 7. FIG.

[Explanation of symbols]

 1 chair 2 legs 3 seat portion 4 backrest 5 support frame 6, 6'armrest 6a, 6a 'free end 7 pin 8 gas spring 13 coil spring

Claims (3)

[Scope of utility model registration request] 1. A leg portion is provided with a seat portion and a backrest,
Also, in a chair provided with armrests on both sides of the seat portion via support frames, the front end of the armrest is pivotally attached to the front end of the support frame by a pin so as to be rotatable in the vertical direction, and the armrest is attached to the armrest. Is an armrest device for a chair, characterized in that it is provided with a biasing means capable of moving the free end up and down. 2. The armrest device for a chair according to claim 1, wherein the urging means comprises a gas spring. 3. The armrest device for a chair according to claim 1, wherein the urging means comprises a coil spring.