JPH11155687A - Armrest device of chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an armrest device of a chair which has a simple structure of an up-and-down angle control mechanism in an armrest section, which can be easily assembled and can reduce manufacturing cost. SOLUTION: An armrest device of a chair has an armrest section 6 up-and-down angle controllable against a support section 5 uprising from a seat section or a leg section. An inclining member 9 fixed within the armrest section 6 is up-and-down inclinably connected to an upper edge of the support section 5 by a horizontal supporting shaft 10. A control lever 11 is displaceably assembled to a front section of the armrest section 6, and a control section 11A is exposed. An adjusting hole 12, which has a plurality of engaging recess sections 12A at up side and down side and a floating section 12B for interlocking each engaging recess section 12A, is formed at one side of the support section 5 on the inclining member 9. A laterally long hole 14 receiving an engaging pin 13 penetrated into the adjusting hole 12 and guiding to move to front and rear directions are formed at the other side. The engaging pin 13 is resiliently compressed to an engaging direction to the engaging recess sections 12A. A loosing edge section of the control lever 11 and the engaging pin 13 are corresponding with a linking means 15 in such a way that the engaging pin 13 is removed from the engaging recess sections 12A by displacement of the control lever 11.

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 up and down.

[0002]

2. Description of the Related Art Heretofore, there has been already provided a chair in which an armrest can be adjusted up and down with respect to a supporting portion rising from a seat or a leg of a chair. 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 an engagement protrusion that can be moved back and forth provided at one of front and rear ends of an armrest is elastically fitted into the engagement recess to adjust the angle in multiple stages.

[0003] However, the conventional angle adjusting mechanism of the armrest portion directly or indirectly links an operation lever for engaging and disengaging the engagement projection with the engagement recess and a member provided with the engagement projection. Due to the connection, there are problems that the structure becomes complicated and assembly is difficult.

[0004]

SUMMARY OF THE INVENTION In view of the above situation, the present invention is intended to simplify the structure of the mechanism for adjusting the vertical angle of the armrest and to assemble the armrest easily. An object of the present invention is to provide a chair armrest device that can be reduced.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is an armrest device for a chair in which an armrest can be adjusted up and down with respect to a support portion rising from a seat or a leg, A tilting member fixed in the armrest portion is connected to the upper end of the support portion so as to be vertically tiltable with a horizontal support shaft, and an operation lever is displaceably attached to a front portion of the armrest portion to expose the operation portion, In one of the support portion or the tilting member, while forming an adjustment hole having a plurality of engagement recesses and a floating portion communicating each engagement recess vertically, on the other,
A horizontally long hole is formed for receiving the locking pin inserted through the adjustment hole and guiding the locking pin to move back and forth, elastically urges the locking pin in a direction to engage the engagement recess, and a free end of the operation lever. And an armrest device for a chair in which the locking pin is disengaged from the engaging recess by the displacement of the operation lever.

Specifically, the operating lever is pivotally attached to the front part of the armrest part so as to be able to tilt forward and backward, and the front end of each engaging recess is provided at the front part of the support shaft with the floating part at the support part. A communicating hole is formed, and an oblong hole is formed in the tilting member, and the free end of the operating lever and the locking pin are connected by a wire as the linking means. Alternatively, an adjustment hole in which the operation lever is pivotally attached to a front portion of an armrest portion so as to be vertically tiltable, and a front portion of the support shaft, and a rear end of each engagement concave portion communicating with the tilting member through a floating portion. And a horizontally elongated hole is formed in the support portion, and a movable member is provided as the linking means so as to be movable back and forth with respect to the tilting member, and the locking pin is formed in a vertically elongated hole formed in the movable member. And the rear downwardly inclined surface of the cam portion formed on the lower surface of the front end portion of the movable member abuts on the pressing portion on the upper surface of the free end portion of the operation lever to be linked.

[0007]

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 4 show a first embodiment of the present invention, FIGS. 5 to 7 show a second embodiment of the present invention, and FIGS.
Is a state in which the armrest is set substantially horizontal, FIGS. 3 and 6 are states in which the armrest is inclined upward and forward, FIGS. 4 and 7 are exploded perspective views of main parts, and reference numeral 1 in the figure is used. The chair has leg portions, 2 a seat portion, 3 a backrest portion, 4 an armrest device, 5 a support portion, and 6 an armrest portion.

The armrest device 4 according to the embodiment of the present invention comprises:
The armrest 6 is provided so that the height can be adjusted and the vertical angle can be adjusted with respect to the 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.

First, the armrest device 4 according to the first embodiment of the present invention will be described in more detail with reference to FIGS. The armrest device 4 of the present invention is connected to a tilting member 9 fixed in an armrest portion 6 at the rear end of an elevating body 8 constituting the support portion 5 by a horizontal support shaft 10 so as to be vertically tiltable. An operating lever 11 is displaceably mounted on a front portion of the portion 6 to expose the operating portion 11A. A plurality of engaging recesses 12A,. 12A, and an adjusting hole 12 having a floating portion 12B communicating with the adjusting hole 12B.
A horizontally long hole 14 is formed for receiving the locking pin 13 inserted through the hole and guiding the same to move back and forth.
2A, the free end portion 11B of the operating lever 11 and the locking pin 13 are moved by the displacement of the operating lever 11 so that the locking pin 13 is
A is linked by the linking means 15 so as to deviate from A.

More specifically, projecting shafts 17, 17 provided on both arm pieces 16, 16 projecting from the upper and lower central portions of the operating lever 11, project from the front surface of the armrest 6 to the inner lower surface. The operating portion 11A is downwardly exposed from a square hole 19 formed on the lower surface so as to be pivotally attached to the provided bearing portions 18 and 18 so as to be able to tilt back and forth. An adjusting hole 12 is formed at the front of the support shaft 10 and at the front of the elevating body 8 so that the front ends of the engaging recesses 12A,. Holes 14 in both side plates 20 and 20
And the operating lever 11 is used as the linking means 15.
The free end 11B and the locking pin 13 are connected by a wire 21. The wire 21 is a flexible sleeve 2
2 and a receiving piece 24 protruding between the bearings 18, with locking edges 23, 23 formed at both ends of the sleeve 22, and a receiving piece 24 provided at the front end of the tilting member 9. Piece 2
5 and fixed to one end of the wire 21
6 is fitted and locked to the free end portion 11B of the operation lever 11, and the ring 27 fixed to the other end is connected to the locking pin 1
3 and extrapolated. The locking pin 13
The extension pins project from both side plates 20, 20 of the tilting member 9, and tension coil springs 28, 28 are mounted between the protruding ends and the rear portion of the side plate 20, and the locking pin 13 is
Are elastically urged in the direction of engagement with the engagement recess 12A.
The tension coil spring 28 is provided on both side plates 2 of the tilting member 9.
It may be arranged between 0 and 20 and one end may be locked to the support shaft 10.

In this embodiment, the armrest 6 is formed by joining an upper cover member 29 made of synthetic resin and a lower cover member 30 to make the interior hollow, and a plurality of reinforcing ribs 31 are provided on the lower surface of the upper cover member 29. Are provided at the front and rear portions, and a reinforcing plate 33 is screwed to the pedestals 32. The tilting member 9 is fixed to the reinforcing plate 33. The reinforcing plate 33 can be integrated with the tilting member 9, and the reinforcing plate 33 can be omitted. The lower cover member 30 has an opening 3 through which the square hole 19 and the elevating body 8 constituting the support portion 5 are inserted.
4 are formed.

When the operating portion 11A of the operating lever 11 protruding from the lower surface of the armrest portion 6 is pushed rearward, the wire 21 is pulled forward, and the locking pin 13 is engaged with the engaging recess of the adjusting hole 12. Move 12A forward. The forward movement of the locking pin 13 is guided by the horizontally elongated holes 14, and when the locking pin 13 comes to the floating portion 12 </ b> B, the front portion of the armrest 6 is vertically adjusted about the support shaft 10. When the finger is released from the operation portion 11A after the angle is set to a predetermined angle, the locking pin 13 is moved to the predetermined engagement recess 12 by the elastic biasing force of the tension coil spring 28.
A is engaged again, and the angle of the armrest 6 is maintained.

FIG. 2 shows a state in which the armrest 6 is in a substantially horizontal state, in which the front part of the armrest 6 is normally lowered most. FIG. 3 shows a state in which the front part of the armrest 6 is raised. It is in an inclined state. The angle of the armrest 6 is adjusted after adjusting the height of the seat 2 and the height of the armrest 6 according to the physique of the seated person.
It is desirable to adjust the armrest 6 so that the upper surface faces the front edge of the desk. When the angle of the armrest 6 is set as described above, the user operates the mouse, which is one of the input means of a word processor or a personal computer, with the elbow placed on the upper surface of the armrest 6 and the wrist placed on the tabletop. Operation is made easier. The same applies when operating the keyboard.

Next, a second embodiment of the armrest device 4 of the present invention will be described in more detail with reference to FIGS. The armrest device 4 of the present embodiment has basically the same structure as that of the first embodiment, and the same components are denoted by the same reference numerals and description thereof will be omitted. Here, only the configuration different from the first embodiment will be described. The armrest device 4 includes a bearing shaft 17, 17 provided on both arm pieces 16, 16 projecting from the front end of the operation lever 11, which is provided at a front portion of the armrest portion 6 and protruding from an inner lower surface. The pivoting member 9 is pivotally attached to the parts 18, 18 so as to be vertically tiltable, and is located in front of the support shaft 10, and
Are formed in both side plates 20, 20 with the rear ends of the respective engaging recesses 12A,... Through a floating portion 12B, and a horizontally long hole 14 is formed in the front portion of the elevating body 8, thereby forming the link. As means 15, a movable member 35 is provided between both side plates 20 and 20 of the tilting member 9 so as to be movable back and forth with respect to the tilting member 9, and both side plates 36 and 36 of the movable member 35 are provided.
The locking pin 13 is inserted through a vertically long hole 37 formed at the front end of the movable member 35, and a downwardly inclined surface 39 of the cam portion 38 formed on the lower surface of the front end portion of the movable member 35 is formed on the upper surface of the free end portion 11B of the operation lever 11. It comes into contact with and presses against the pressing portion 40.

More specifically, the front / rear guide structure of the movable member 35 with respect to the tilting member 9 includes a pair of side plates 36, 36 of the movable member 35 slidably disposed between both side plates 20, 20 of the tilting member 9. The upper surface of the movable member 35 is in sliding contact with the lower surface of the upper plate 41 of the tilting member 9, and the oblong holes 42, 42 formed at the rear of the side plates 36, 36 are inserted into the support shaft 10, and the cam portion 38 is inclined. The surface 39 is placed on the pressing portion 40 of the operation lever 11. Further, the tension coil spring 28 is locked between the front end of the movable member 35 and the front end of the reinforcing plate 33 to elastically urge the movable member 35 forward, and thus the locking pin 13 engaged with the elongated hole 37. Are elastically urged forward so as to engage with the engagement recesses 12A of the adjustment holes 12. The both side plates 36 of the movable member 35 are disposed so as to sandwich the upper end of the elevating body 8. The mounting position of the tension coil spring 28 is arbitrary.

The operating portion 11 of the operating lever 11
A by pushing A, the pressing portion 40 of the free end portion 11B
The movable member 35 moves rearward against the elastic biasing force of the extension coil spring 28 while pressing the inclined surface 39 of the cam portion 38 and slidingly contacting each other.
The locking pin 13 engaged with the engagement recess 12 moves rearward and
When the armrest 6 deviates from A and reaches the floating portion 12B, the front portion of the armrest 6 can be turned up and down around the support shaft 10. Then, after setting the armrest 6 at a predetermined angle, if the finger is released from the operation unit 11A, the movable member 35 moves forward by the elastic biasing force of the tension coil spring 28, and the locking pin 13 The angle is maintained by engaging with the engaging recess 12A.

[0017]

According to the armrest device for a chair of the present invention as described above, it is easy to assemble the mechanism for adjusting the vertical angle of the armrest portion, so that the manufacturing cost can be greatly reduced and the vertical angle of the armrest portion can be easily adjusted. For example, when operating a mouse or keyboard of a word processor or a personal computer placed on a desk top, the height of the armrest is set to approximately the same height as the desk top, and the height of the armrest is Even if the front end upper surface is continuous with the front edge of the desk top plate to achieve a comfortable supporting state of the wrist portion, the optimum distance from the shoulder to the elbow can be secured by setting the angle of the armrest.

[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 an enlarged longitudinal sectional view of a main part of the armrest device according to the first embodiment of the present invention when the armrest is in a substantially horizontal state.

FIG. 3 is an enlarged longitudinal sectional view of a main part when the armrest is in an inclined state.

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

FIG. 5 is an enlarged longitudinal sectional view of a main part of the armrest device according to the second embodiment of the present invention when the armrest is in a substantially horizontal state.

FIG. 6 is an enlarged vertical sectional view of a main part when the armrest is in an inclined state.

FIG. 7 is an exploded perspective view.

[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 Tilting member 10 Support shaft 11 Operation lever 11A Operation part 11B Free end part 12 Adjusting hole 12A Engaging concave part 12B Idle Part 13 Locking pin 14 Horizontal oblong hole 15 Linkage means 16 Arm piece 17 Protruding shaft 18 Bearing part 19 Square hole 20 Side plate 21 Wire 22 Sleeve 23 Locking edge 24 Receiving piece 25 Receiving piece 26 Protrusion 27 Ring 28 Tension coil spring 29 Upper part Cover member 30 lower cover member 31 reinforcing rib 32 pedestal 33 reinforcing plate 34 opening 35 movable member 36 side plate 37 vertically long hole 38 cam portion 39 inclined surface 40 pressing portion 41 upper surface plate 42 horizontally long hole

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinji Inoue 1-4-1-12 Imafukuhigashi, Joto-ku, Osaka Inside Itoki Crebio Co., Ltd.

Claims (3)

[Claims] 1. An armrest device for a chair in which an armrest can be adjusted up and down with respect to a support part rising from a seat or a leg, and a tilting member fixed in the armrest at the upper end of the support part is provided horizontally. A pivot is connected to the armrest so as to be tiltable up and down, and an operating lever is attached to the front of the armrest so as to be displaceable to expose the operating portion. While forming an adjustment hole having a concave portion and a floating portion communicating each engagement concave portion,
A horizontally long hole is formed for receiving the locking pin inserted through the adjustment hole and guiding the locking pin to move back and forth, elastically urges the locking pin in a direction to engage the engagement recess, and a free end of the operation lever. And an armrest device for a chair, wherein the locking pin is interlocked with the locking pin so that the locking pin is disengaged from the engagement recess by the displacement of the operation lever. 2. The operating lever is pivotally attached to a front portion of an armrest so as to be able to tilt forward and backward, and a front end of each engaging recess is communicated with the support portion at a front portion of the support shaft by a floating portion. 2. The armrest device for a chair according to claim 1, wherein an adjusting hole is formed, a horizontally long hole is formed in the tilting member, and the free end of the operating lever and the locking pin are connected by a wire as the linking means. 3. The operating lever is pivotally attached to a front portion of an armrest so as to be tiltable up and down, and a front end of the support shaft, and a rear end of each engaging recess is communicated with the tilting member by a floating portion. Along with the adjustment hole, a horizontally long hole is formed in the support portion, and a movable member is provided as the linking means so as to be movable back and forth with respect to the tilting member. 2. A movable member, wherein a rearwardly downwardly inclined surface of a cam portion formed on a lower surface of a front end portion of the movable member is brought into contact with a pressing portion on an upper surface of a free end portion of the operation lever, and is linked. An armrest device for a chair as described.