JP2522859Y2 - Operation lever structure for chair - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an operation lever structure of a chair, and more particularly, to a chair in which a height of a seat plate and a tilt angle of a backrest plate are adjusted by an operation lever using a gas cylinder. And a connecting structure between the seat operating member or the back operating member and the operating lever.

[0002]

2. Description of the Related Art The operation lever structure of a conventional chair is as follows.
The lower surface of the seat plate for connecting the seat plate and the support shaft of the leg by shifting the rotation axis of the seat operation lever for adjusting the height of the seat plate and the back operation lever for adjusting the tilt angle of the backrest plate. It was of a structure provided on both sides of the mounting body fixed to the.

However, when such an operation lever is arranged, a bearing structure for rotatably supporting the operation lever is required inside the mounting body, which complicates the structure and requires a large space. The attachment was inevitably large. This not only hinders cost reduction, but also impairs the symmetry of the left and right operation levers, resulting in poor overall balance as a chair.

Therefore, the present applicants share a single shaft body, rotatably extrapolate a seat operation member and a back operation member at both ends thereof, and further fix an operation lever to those members. Already invented.

However, when a single shaft is used in common, first, the shaft is inserted through the mounting body and each member while the seat operating member and the back operating member are arranged at predetermined positions of the mounting body. , It is necessary to adopt an assembling procedure in which the seat operating lever and the back operating lever are fixed to the end of each member, respectively, and the seat operating lever and the back operating lever need to have the same shape for cost reduction. For some reasons, it is desirable that the operating lever is formed separately from the operating member, and that they can be easily connected so as to be non-rotatable and detachable by only fitting work.

[0006]

SUMMARY OF THE INVENTION In view of the above situation, the present invention is to solve the problem by forming the seat operating member and the back operating member, the seat operating lever and the back operating lever separately, and A point to provide an operation lever structure in a chair in which, when they are fixed to a mounting body so that they cannot rotate and cannot be pulled out, the shaft body does not move in the axial direction and rattles. It is in.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a chair in which the height of a seat plate and the tilt angle of a backrest plate are adjusted by operating levers using a gas cylinder. The shaft cylinder of the seat operation member or the back operation member is rotatably inserted into the end of the shaft body mounted on the mounting body of the plate, and the shaft cylinder is rotated to the connection hole provided at the base end of the operation lever. In a state in which the stopper is fitted so as not to be impossible, the distal end of the shaft body and the distal end of the barrel are simultaneously butted against the stepped portion of the rib protruding into the hollow portion continuously opened to the connection hole. The operation lever structure in the chair consisting of

[0008]

The operation lever structure of the chair according to the present invention having the above-mentioned contents has a seat operating member and a back operating member which are respectively arranged at predetermined positions of a mounting member of a seat plate, and in this state, the shaft body is mounted on the mounting member. And after being rotatably inserted into the shaft cylinders of the seat operation member and the back operation member, the seat operation member and the back operation member are fitted into the connection holes of the seat operation lever and the back operation lever respectively at ends of the shaft cylinder of the back operation member. When the shaft is fixed so that it cannot rotate and cannot be pulled out, the tip of the shaft cylinder and the tip of the shaft simultaneously abut against the step of the rib protruding from the cavity of the operation lever, and stop. Is restricted from moving in the axial direction.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention;

FIG. 1 shows a main part of the present invention, and FIGS. 2 to 4 show main members, wherein 1 is a seat operating lever, 2 is a back operating lever, 3 is a seat operating member, and 4 is a back operating member. Member, 5 is a shaft,
Reference numeral 6 denotes an attachment body.

The chair according to the present invention, as shown in FIGS. 1 and 5, allows the mounting member 6 to be rotatable or non-rotatable on a seat gas cylinder 7 for height adjustment mounted on a support shaft erected on the leg. A seat plate (not shown) is fixed to the upper surface of the mounting body 6, and a backrest rod 8 for attaching a backrest plate (not shown) is pivotally mounted on a fixed support shaft 9 so as to be tiltable back and forth at the rear,
In addition, a back gas cylinder 11 for adjusting the tilt angle of the backrest rod 8 is pivotally mounted between a tip of a tilting plate 10 extending obliquely downward from the fixed support shaft 9 of the backrest rod 8 and an appropriate position of the mounting body 6. It was done.

According to the present invention, the shaft tube 12 of the seat operating member 3 and the shaft tube 13 of the back operation member 4 can be turned on both ends of the shaft body 5 which is mounted in the front side of the mounting body 6 in the lateral direction. Extrapolated to
An axial connection hole provided in the center portion of the shaft cylinder 12 so as to abut against each other, and the distal end portion of the barrel 12 is provided in the base end portion 14 of the seat operating lever 1.
In a state in which the shaft body 5 and the stopper of the shaft cylinder 12 are non-rotatably fitted into the stopper 15, the front end of the shaft body 5 and the front end of the shaft cylinder 12 are axially protruded into a hollow portion 16 continuously opened to the connection hole 15. Extended rib 17
Simultaneously butts against the step 18 of the seat, and the one-seat operation lever 1
The back operation lever 2 having the same shape as the above is also mounted in the same manner as described above. Here, since the back operation lever 2 is the same as the seat operation lever 1, the reference numerals of the respective parts are the seat operation lever 1.
The description is omitted because it is the same as that of FIG. Hereinafter, the present invention will be described in more detail.

First, the seat operation lever 1 is shown in FIGS.
As shown in (c) and (d), a base end 14 and a handle 19 bent continuously from the base end 14 are provided, and the base end 14 has a polygonal opening to the base end, in this embodiment, a hexagonal cross section. A connection hole 15 is formed, and a cavity 16 is formed in the cavity 16 which is continuously open in the distal direction. A rib 17 extending in the axial direction is protruded from the cavity 16 so that the connection hole 15 and the cavity 16 are formed. The stepped portion 18 of the rib 17 is formed at the boundary of the hole, and the substantially rectangular engagement holes 20, 20 communicating with the connection hole 15 are formed on the base end side to face each other, and between the engagement holes 20, 20. Two slits 21 and 21 opened to the base end are formed. When the seat operating lever 1 is integrally formed of synthetic resin, the provision of the hollow portion 16 can reduce the amount of resin and prevent sink during molding. Since the back operation lever 2 is the same, the description is omitted.

Next, the seat operating member 3 is shown in FIGS.
As shown in (c), a crank portion 23 for bypassing the side plate 22 of the mounting body 6 is formed at the center of the shaft cylinder 12, and a shaft hole through which the shaft body 5 is rotatably inserted in the axial direction. A through hole 24 is formed, and the shaft hole 24 is completely opened in the concave portion 25 of the crank portion 23. The distal end of the barrel 12 is formed in a polygonal column, in this embodiment, a hexagonal column so as to be non-rotatably fitted into the connection hole 15 of the seat operation lever 1. Triangular dowels 26, 26, which fit into the first engaging holes 20 so as to prevent them from slipping off, are protruded from the opposing surfaces. Further, a locking portion 28 for connecting one end of a wire 27 constituting a seat interlocking mechanism for operating the seat gas cylinder 7 is provided on the base end portion of the shaft cylinder 12 so as to protrude from a side surface.

Also, the back operation member 4 is provided with the back operation member 4 shown in FIGS.
As shown in (c) and (d), a side plate of the mounting body 6 is provided at the center of the barrel 13.
A crank portion 29 for bypassing 22 is formed, and an axial hole 30 through which the shaft body 5 is rotatably loosely inserted is formed in the axial direction,
The shaft hole 30 is completely opened in the concave portion 31 of the crank portion 29. Further, a polygonal pillar is provided so that the tip end of the shaft hole 30 can be inserted into the connection hole 15 of the back operation lever 2 in a non-rotatable manner.
In this embodiment, a hexagonal prism is formed, and triangular dowels 32, 32 which are fitted to the engaging holes 20 of the back operation lever 2 so as to be locked therefrom are protruded from the opposing surfaces on the side surfaces. Further, at the base end of the shaft hole 30, a cam 34 for pressing an operation plate 33 constituting a back interlocking mechanism for operating the back gas cylinder 11 is formed. 30 are fully open.

Thus, in order to assemble the operation lever and the like,
As shown in FIG. 1, first, the seat operating member 3 is
The side plate 22 of the mounting body 6 is disposed at a predetermined position so that the side plate 22 of the mounting body 6 is located in the concave portion 25 of the mounting member 6. The shaft body 5 is inserted into the shaft holes 24 and 30 of both members in a state where it is arranged at a predetermined position. In this case, the side plate 22 has the shaft hole 30.
Is formed and the hole is inserted through the hole at the same time. Then, the connecting hole 15 of the seat operating lever 1 is non-rotatably fitted to the distal end of the shaft cylinder 12 of the seat operating member 3 so as not to be rotatable, and the engaging hole 20 and the triangular dowel 26 are engaged with the stopper. On the other hand, the connection hole 15 of the back operation lever 2 is non-rotatably fitted to the distal end of the shaft cylinder 13 of the back operation member 4 so as not to rotate, and the engagement hole 20 and the triangular dowel 32 are engaged with the stopper. . In this state, the seat operating lever 1 and the seat operating member 3 can rotate integrally, and the back operating lever 2 and the back operating member 4 can integrally rotate. It is possible to rotate independently of the member.

Here, since the slits 21 and 21 are formed in the base end portions of the seat and the back operation lever, the operation lever is fitted to the shaft tube 12 of the seat operation member 3 and the shaft tube 13 of the back operation member 4. At this time, when the engagement hole 20 is engaged with the triangular dowels 26 and 32, the portion between the slits 21 and 21 is opened outwardly to facilitate the work. The structure in which the operation lever 1 or 2 and the shaft cylinder 12 of the seat operation member 3 or the shaft cylinder 13 of the back operation member 4 are non-rotatably connected is not limited to the above-described example. The structure is not limited to the above example.

Further, in order to make the rotation of the seat operating lever 1 interlock with the operation of the seat gas cylinder 7, FIGS.
As shown in the figure, a wire is provided between the distal end of an arm 37 of a substantially rectangular shaped follower member 36 which is vertically rotatably disposed near the operating pin 35 of the seat gas cylinder 7 and the engaging portion 28 of the seat operating member 3.
27, and by rotating the seat operation lever 1,
As shown in FIG. 7, the driven member 36 is rotated via the wire 27, and the operating pin 35 is pushed by the pressing piece 38 of the driven member 36.

In order to interlock the rotation of the back operation lever 2 with the operation of the back gas cylinder 11, both side pieces 40, 40 of the connecting member 39 having a substantially U-shaped cross section are attached to the shaft 5 exposed on both sides of the cam 34. Is rotatably fitted, the base end of the operation plate 33 is pivotally mounted on the side pieces 40, 40, and the dimensions are set so that the end of the cam 34 abuts on the outer surface of the front end thereof. By fixing the operation pin 41 side of the cylinder 11 to the intermediate plate 42 of the connecting member 39, bringing the operation pin 41 into contact with the center of the inner surface of the operation plate 33, and rotating the back operation lever 2, FIG. The operation plate 33 is rotated by the cam 34 as shown in FIG.
To push the operation pin 41 in.

The seat gas cylinder 7 and the back gas cylinder 11 employed in the present invention are known in the art, and the piston rod can be moved in and out of the cylinder, and the operating pin 35 or 41 protruding from the tip of the piston rod. If you press
The rod is automatically protruded when there is no load, the rod can be pushed in when a load is applied, and the rod is locked when the operation pin is protruded.

[0021]

According to the operating lever structure of the chair according to the present invention, the height of the seat plate and the tilt angle of the backrest plate are adjusted by the operating lever using the gas cylinder. The shaft cylinder of the seat operation member or the back operation member is rotatably inserted into the end of the shaft body mounted on the mounting body of the plate, and the shaft cylinder is rotated to the connection hole provided at the base end of the operation lever. In a state in which the stopper is fitted so as not to be impossible, the distal end of the shaft body and the distal end of the barrel are simultaneously butted against the stepped portion of the rib protruding into the hollow portion continuously opened to the connection hole. Therefore, the seat operating member and the back operating member are respectively arranged at predetermined positions of the mounting body of the seat plate, and in this state, the shaft is rotated relative to the mounting body and the shaft cylinder of the seat operating member and the back operating member. After inserting as much as possible, seat the user on the ends of the barrels of the seat operating member and the back operating member respectively. The lever and the back operation lever can be easily assembled by being fitted into the connection holes of the lever and the back operation lever so as to be non-rotatable and non-removable. In this state, the shaft is provided on the step of the rib protruding from the cavity of the operation lever. The distal end of the cylinder and the distal end of the shaft can be simultaneously butted against each other to restrict the axial movement of the shaft, and the backlash of the shaft can be reduced without using any special parts. Can be prevented.

Furthermore, by forming a hollow portion inside the operation lever and projecting a rib inside the operation lever, the shaft can be short even if the operation lever becomes long, and the operation lever is made of synthetic resin. In this case, the amount of resin can be saved, and the ribs can prevent sink in molding.

[Brief description of the drawings]

FIG. 1 is a plan view showing a main part of the present invention in a partial cross section.

FIG. 2 shows an operation lever, (a) is a plan view, (b) is (a)
(C) is a cross-sectional view taken along the line BB of (b), (d)
Is a sectional view taken along line CC

3A and 3B show a seat operating member, wherein FIG. 3A is a plan view and FIG.
(C) is a sectional view taken along the line BB of (a).

4 (a) is a plan view, FIG. 4 (b) is a front view, FIG. 4 (c) is a sectional view taken along line AA of FIG. 4 (a), and FIG.
Line cross section

FIG. 5 is a plan view showing, in partial cross-section, a main part of an interlocking mechanism of a chair seat and a back.

FIG. 6 is a longitudinal sectional side view of the normal state of FIG. 5;

FIG. 7 is a longitudinal sectional side view showing a state where the operation lever of FIG. 5 is rotated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat operation lever 2 Back operation lever 3 Seat operation member 4 Back operation member 5 Shaft 6 Mounting body 7 Seat gas cylinder 8 Backrest rod 9 Fixed support shaft 10 Tilt plate 11 Back gas cylinder 12 Shaft cylinder 13 Shaft cylinder 14 Base end Part 15 Connection hole 16 Cavity part 17 Rib 18 Step part 19 Handle 20 Engagement hole 21 Slit 22 Side plate 23 Crank part 24 Shaft hole 25 Depression 26 Triangular dowel 27 Wire 28 Locking part 29 Crank part 30 Shaft hole 31 Depression 32 Triangular dowel 33 Operation plate 34 Cam 35 Operation pin 36 Follower member 37 Arm 38 Pressing piece 39 Connecting member 40 Side piece 41 Operation pin 42 Intermediate plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A chair in which the height of a seat plate and the tilt angle of a backrest plate are adjusted by an operating lever using a gas cylinder, and a seat operating member is attached to an end of a shaft attached to a mounting body of the seat plate. Alternatively, while the shaft cylinder of the back operation member is rotatably inserted outside, and the shaft cylinder is non-rotatably fitted into the connection hole provided at the base end portion of the operation lever so as to prevent the shaft cylinder from coming off, the tip of the shaft body is An operating lever structure for a chair, wherein the shaft and the tip of the barrel are simultaneously butted against a step portion of a rib protruding into a hollow portion continuously opened to the connection hole.