JPH0721140Y2 - Lever device for operating chair gas springs - Google Patents

Description

[Detailed description of the device]

[0001]

INVENTION The present invention relates to a switch the gas spring in the free state and the locked state, the seat or backrest or the like, a gas spring operating lever device of the chair that fixes or or by tilting.

[0002]

2. Description of the Related Art As a chair in which a tilting portion such as a seat or a backrest is tilted and fixed , for example, JP-A-54-2 is used.
There is one described in Japanese Patent No. 4166. The chair is in its lower portion, and a lever for pushing the opening and closing push valve of the gas spring, has an oscillating or slidable stopper, the gas spring in a free state by rotating the lever After that, engage the stopper with the engaging member that extends from the seat receiving frame to set the gas spring to the free state.
You can keep it and adjust the tilt of the seat or backrest freely.
It was done like this.

[0003]

[Challenges devised to solve the above conventional, or to maintain the gas spring in the free state, the Ru <br/> be or to release the lock state, apart from the operation of the lever, the engagement engaging and disengaging operation of the stopper Was required, and not only was the operation troublesome, but the structure was complicated.

[0004] The present invention is fixed in a state of releasing the lever of the tilting part, tilting adjustment while operating the lever, and the tilting adjustment in a state of releasing the lever, so that perform the operation of one lever to, moreover an object to provide a gas spring operating lever device of the chair that the structure is simplified.

[0005]

In order to achieve the above object, a lever device for operating a gas spring of a chair according to the present invention pivotally supports a base frame portion and a tilting portion of the chair, and both of them are connected by a gas spring. In a chair in which a gas spring is switched between a free state and a locked state via a wire by operating a lever that is connected and placed in a proper position on the chair, the wire is pulled by the rotating shaft provided at the base end of the lever. Then, when the gas spring is rotatable in the direction to make it free, pivotally supported on the seat, and when the lever is fully rotated, the locking shaft provided on the lever is pressed in substantially parallel to the rotation shaft. It is characterized in that the seat is provided with a gripper that opens toward the locking shaft so as to be fitted together.

[0006]

When the wire is pulled by the lever and the gas spring is freed from the state where the tilting portion of the chair is fixed, the tilt can be adjusted while operating the lever.
When Ru rotates the lever to the full, locking shaft provided on the lever, fitted by entering pressure grippers provided on the seat, it can be performed tilt adjustment in a state of releasing the lever. Therefore, all the operations can be performed by one lever, and the structure of the gas spring operating lever device is simplified.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. Chair, fixed base on end of Ashi杆(1) rod portion
And (2), and a <br/> the tilting unit that is pivotally supported tiltably on the top and (3).

The tilting part (3) comprises a seat (4), a backrest (5), a support frame (6), etc., and the tilting part (3) is arranged in the left-right direction.
The pivot shaft (7), which is pivotally supported on the base rod portion (2). seat
The lower surface of (4) and the base rod (2) are gas springs (10) whose front and rear ends are pivotally supported on them by connecting shafts (8) and (9) , respectively.
It is connected with, and by expansion and contraction of the gas spring (10) ,
Tilting section (3) is adapted to be tilted back and forth. Gas spring (10) is provided with an operation portion installed in the lower surface of the seat (4)
(11), it is connected with a wire (12), supporting full
It can be adjusted by a lever (13) pivotally supported on the lower part of the ram (6) so as to be able to rotate in and out.

The operating portion (11) is shown in an exploded view in FIG. 3, and has a rotary shaft (14) provided at the upper end of the lever (13) and projecting forward and backward ,
A bearing portion that Setsu設the outer surface of the seat supporting lifting member provided in (4) (15)
It is fitted and supported on (16) and is rotatable . Support (15)
Of the cutting hole (17) provided on the inner surface central portion, the outer end of the wire cover (18) is fixed me also the tightening nut (19) (19), the outer wire cover (18) from the end, wire inwardly multiplied by tension (12) is extended. Wire (1
Engaging ball provided on the inner end of 2) (20) are set on top of the lever (13)
Locking the girder longitudinal groove (21) in continuous outwardly hemispherical spherical hole (22) in
Has been done.

Therefore, the rotary shaft (14) of the lever (13) is connected to the bearing portion.
(16), and engage the locking ball (20) with the spherical hole (22) of the lever (13).
The lever (13) and wire (12) can be easily
It can be attached to a support (15) . On lever (13)
At the end inside, locking shaft forming a substantially parallel to the rotation axis (14) (2
3) is provided, and the support (15) rotates the lever (13) outward.
When moved, the locking shaft (23) fits in from above and
An upward gripper (24) is provided so as to be locked .

The inner end of the wire (12) is locked similarly to the outer end.
It is a sphere (20) and is connected to the upper end of a swinging member (26) whose lower end is pivotally supported by a left-right shaft (25) . Front <br/> of the swing member (26) is in contact with the head of the push valve (27) of the gas spring (10). 4 and 5, by rotating the lever (13), a seat (4) and the backrest (5) ing from the tilting part to the base rod portions (2) and (3), radical rod portions ( are <br/> shows the state for times swings relative 2). Lever (13) is, when in the solid line position of FIG. 4 (a), the swinging member (26), for the tension in the wire cover (18), in FIG. (B) indicate to the solid line position (after Position) and the push valve (27) remains protruding.

When the lever (13) is rotated outward about the rotation shaft (14) to the position indicated by the broken line as shown by the arrow, the wire (12)
Is pulled, and the swinging member (26 ) is centered on the left-right shaft (25).
Te and front to rotation to a position of a broken line as indicated by an arrow, pushing the push valve (27). Therefore the gas spring (10) is opened.
Being valved, it can be freely expanded and contracted, and the tilting part of the chair
The slope of (3), it becomes possible to freely adjust the center tilt shaft (7).

[0013] Next, even release the lever (13), the tilting section in the seated person's weight (3) so as to freely tilt, the lever (13), FIG. 5 (a) Turn fully outward
Let Then, the upper portion of the locking shaft (23) is fitted to the grippers (24), the wire (12) is fixed to the lever (13) in a state of being pulled further and the push valve (27),
The gas spring (10) is set to remain open. To release this free tilting state, the lever (13)
And by inward rotation as in FIG. 4, grid a locking shaft (23)
Remove from par (24), a gas spring (10) to the time difference closed by a push-valve (27). Thereby, the tilting portion (3) is fixed.

[0014]

[Effect of the proposed Invention The present invention, Ru response rates Siu the following effect. (a) Fixing of the tilting member with the lever released, tilt adjustment while operating the lever, and tilt adjustment with the lever released can be performed with one lever operation, making chair adjustment extremely easy. Can be done. (b) Since there is only one operating lever, the structure is simplified.

[Brief description of drawings]

FIG. 1 is a cutaway view of a main part of a plan view of a chair according to an embodiment of the present invention.

FIG. 2 is a partial cutaway view of a side view of a chair according to an embodiment of the present invention.

FIG. 3 is an exploded view of the operation unit of FIG.

FIG. 4 (a) is an operation diagram in the AA sectional view of FIG. 1; (b) It is an operation view in the BB cross-sectional view of FIG. 1.

5 (a) is an operation diagram in the AA sectional view of FIG. 1. FIG. (b) It is an operation view in the BB cross-sectional view of FIG. 1.

[Explanation of symbols]

(1) Ashi杆(2) group stem part (3) tilting section (4) seat (5) backrest (6) supporting frame (7) pivot axis (8) connecting shaft (9) connecting shaft (10) Gas spring (11) the operation unit (12) wire (13) the lever (14) rotation axis (15) support (16) bearing portion (17) Setsukomiana (18) wire cover (19) tightening nut (20) engaging balls (21) longitudinal grooves (22) spherical hole (23) locking shaft (24) gripper (25) lateral axis (26) swing member (27) push the valve

Claims (1)

[Scope of utility model registration request] 1. A base frame portion and a tilting portion of a chair are pivotally supported.
On the other hand, in a chair in which both are connected by a gas spring and the gas spring can be switched between a free state and a locked state via a wire by operating a lever arranged at an appropriate position of the chair, the lever is provided at the base end portion of the lever lever rotation shaft, as it is rotatable in the directions of the gas spring in a free state by pulling the wire, when pivoted to the seat, and to rotate the lever to the full, as substantially parallel to the rotary shaft was
As locking shaft provided fits by entering pressure, towards the locking shaft
A lever device for operating a gas spring of a chair, characterized in that a gripper opening toward the seat is provided on the seat.