JPH0721141Y2 - Height adjustment device for chairs, etc. - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height adjusting device for a chair or the like using a gas spring.

[0002]

2. Description of the Related Art An example of a height adjusting device for a chair or the like using a gas spring is described in Japanese Utility Model Publication No. 59-5401 .

The device described in the above-mentioned publication discloses a chair leg (10
A spherical seat (104) is provided at the center of the push metal fitting (103) attached to the support body (1) above, and the spherical seat (104) is placed above it.
Ring receiving mount (106) having a concave seat (105) for inserting
In addition, the ring body (108) is mounted concentrically with the chair main shaft through the ring receiver (107), and above the concave seat (105), approximately concentrically with this, the chair seat plate lifting gas spring ( Ten
The recess seat (112) of a required shape for receiving the push pin (111) of the push valve body (110) of 9) is provided in the ring receiving attachment body (106) .
It is a thing. This movement, when tilted required angle ring body (108), the lower end spherical portion of the push pin (111) of the push valve body (110) to the upper portion along the inner surface of the recessed seat (112) Then , the push valve body (110) is pushed up, the gas spring (109) is activated, and the seat plate is moved up and down.
Has become.

[0004]

[Problems to be Solved by the Invention] However , in the above conventional technique, when the seat plate is moved up and down, the ring receiving mount (1
The inner surface of the recessed seat (112) of (06) strongly twists the push pin (111) and pushes up the push valve body (110) with that force.
Pushpin (111) is easily broken, Ru problems exist that also cause a malfunction.

[0005] The present invention is, which has been made in view of the above problems, it pries the push valve body which functions as突栓gas pressure adjustment of the gas spring directly Do <br/> rather It is an object of the present invention to provide a height adjusting device for a chair or the like with few failures .

[0006]

[Means for Solving the Problems] In order to solve the above problems
, In the invention of claim 1, around the side walls of the mounting frame that collision set the Ashi杆radially at the lower end of the leg, such as a chair, and bored a plurality of window opening, to the mounting frame, gas Insert and support the lower part of the gas spring with the pressure adjusting plug down, and place it on the lower surface of the gas pressure adjusting plug and on the upper surface of the pressing body.
The support shaft that abuts the spherical part that is in contact with and is hung from the center of the lower surface of the pressing body, is screwed into the screw hole that is drilled in the center of the disk that is placed on the upper surface of the bottom piece of the mounting frame. bottom piece tiltably loosely inserted in the holding hole formed in the further, the outer ends of the plurality of operating rod which is fixed to the inner end portion to the peripheral portion of the disc, is projected from the window hole Rutotomoni, gas It is fixed to a ring that is concentric with the spring.

[0007] In the invention of claim 2, around the side walls of the mounting frame that collision set the Ashi杆radially at the lower end of the leg, such as a chair, and bored a plurality of window opening, in the mounting frame The lower part of the gas spring with the gas pressure adjusting stud below is fitted and supported in the support cylinder provided in the
The upper surface of the flat plate-like disk which is placed on the upper surface of the pieces, under the pressing body
Is brought into contact with the spherical portion in a plane, and the upper portion of the pressing member, the vertically movable fitted is allowed to support cylinder of the lower end opening, the upper surface of the pressing body, is abutted against the lower surface of突栓for adjusting the gas pressure, Furthermore
, The outer ends of the plurality of operating rod which is fixed to the inner end portion to the peripheral portion of the disc, is protruded from the window hole, and fixed to a ring which is provided on the gas spring concentrically, the pressing body top and gas A spring is provided between the spring and the lower surface of the spring .

[0008]

[Function] When a ring or the like is pushed down to incline a desired angle by a foot or the like, the disk and the pressing body penetrating the support shaft in the disk are tilted, and the spherical upper surface of the pressing body causes the gas pressure adjusting protrusion. Since the lower surface of the stopper is directly pressed, the gas pressure adjusting stud is not strongly twisted, and the support shaft is tiltably freely inserted into the bottom wall of the mounting frame. Will not move laterally on the bottom wall of the mounting frame and will not come off from the upper surface of the gas pressure adjusting stud (claim 1).

Further, the lower part of the gas spring is fitted into and supported by the support cylinder in the mounting frame, and the pressing body has a spherical lower surface in contact with the upper surface of the disk placed on the upper surface of the bottom wall in the mounting frame. the upper and vertically movable fitted is allowed to support tube bottom opening from the support tube within, for a pressing body upper surface and into contact with the lower surface of突栓for adjusting the gas pressure, the axis of the pressing body is突栓for regulating gas pressure The center is pushed down vertically, and the tilted disc does not directly pry the gas pressure adjusting plug (claim 2).

[0010]

EXAMPLES Hereinafter, the first embodiment of the present invention, FIGS. 1 and 2
It will be described based on. As shown in the figures, a first embodiment
The applied chair (1) is a seat (3), a gas spring (4),
It is provided with a leg (5), a mounting frame (6) and a leg rod (7). Leg (5)
Becomes because the upper leg (5a) lower leg and (5b), upper leg (5a) is a vertically movable relative <br/> lower leg (5b), the upper end of the upper leg (5a) is It is fixed to the bottom of the seat (3). The lower end of the lower leg (5b) mounting frame (6) are mounted on the mounting frame (6), 4
Number of Ashi杆(7) has been collision set in a radial pattern. The tip of Ashi杆(7), casters (8) is attached.

Gas spring constituting the height adjusting device H
(4) is provided in the leg (5), the top mounted to the lower portion of the seat (3), also the lower part, and the gas pressure controlling突栓(9) downward, the mounting frame (6) in It is inserted and supported. Gas spring (4) is a one that is conventionally commonly used, operating Then working gas pressure regulating突栓(9) by Ri gas spring (4) in the opening and closing valve (not shown) It is a thing.

On the bottom of the mounting frame (6) , the bottom piece (10) is bolted.
On the upper surface of the mounted with a (11), and the bottom piece (10), plate-shaped disc (12) is placed. On the axis X of definitive to the lower surface of the gas pressure regulating突栓(9), on the pressing member (14)
And the spherical portion (13) abuts on the surface, from the central portion of the lower surface of the pressing body (14), a downward shaft (15) is projected.
The support shaft (15), disc (12) bored in the central portion has been threaded hole (16)
After being screwed on, it is tiltably loosely inserted into the bottom piece drilled the holding hole (10) (17). The gas pressure adjusting突栓(9) is closed the spring force of the opening and closing valve are acting, the spring force is transmitted to the disc (12) via the pressing member (14), the disc (12) the lower surface is not brought into contact with the upper surface of the bottom piece (10)
It

A plurality of operating rods are provided on the periphery of the upper surface of the disk (12).
(18) and the inner end portion is fixed in each operating rod (18) protrudes from the window hole (20) bored in the periphery of the side wall (19) of the mounting frame (6), the outer end portion Is fixed to a ring (21) concentric with the gas spring (4).

Next, the operation will be described. And has a user who sits on the chair (1) is, when it is desired to adjust the seat position, Keru required angle tilted depressed, the disc (12) to any point in the foot or the like of the ring (21). Then, on the spherical part (13) at the upper end of the pressing body (14).
As a result, the lower surface of the gas pressure adjusting plug (9) is pressed,
Gas pressure regulating突栓(9) without being pried strong gas spring (4) is actuated, the seat (3) is vertically movable.

[0015] Thus, the support shaft (15), the bottom piece of the mounting frame (5)
The disc (12) and the pressing body (14) move laterally on the bottom piece (10) because they are loosely inserted in the holding hole (17) formed in (10), so that the gas pressure never <br/> departing from the upper surface of the adjustment突栓(9).

[0016] The seat reaches a desired height, the user releases the foot like the ring (21), the gas pressure adjusting突栓(9) is returned to the original position by the stopper spring of the opening and closing valve, The operation of the gas spring (6) is stopped, the movement of the seat (3) is stopped, and the disk (12) is elastically pressed against the upper surface of the bottom piece (10) of the mounting frame (6).

[0017] Thus, in the height adjustment device H of the chair of this embodiment, from <br/> spherical shaped portion (13) pressing body which is the upper surface (14), butt for conditioning gas pressure since the lower surface of the plug (9) is directly pressed, that gas pressure regulating突栓(9) is pried strongly Flowers
Yes. Moreover shaft (15) is bored in the central portion of the disk (12)
Screwed into threaded holes (16), and for the bottom piece (10) bored with a holding hole of the mounting frame (5) (17) is tiltably loosely fitted, the disc (1
2) a pressing member (14) is, mounting frame (6) the bottom piece (10) upper surface that is a <br/> physicians departing from moving on laterally gas pressure regulating突栓(9) Therefore , the risk of breakdown is low.

Next, a second embodiment of the present invention,Based on Figure 3
And explain. Height adjusting device H of the second embodimentAt
Is the mounting frame (6)To be oneIn support tube (22),Gas pressure adjustment
Lower part of the gas spring (4) with the stopper plug (9) facing downwardToFit
Insertion supportI am doing it.

The upper portion of the pressing body (23) is fitted into the opening at the lower end of the support cylinder (22) so as to be able to move up and down, and the upper surface thereof abuts the lower surface of the gas pressure adjusting stud (9). contact, and spherical on the bottom surface portion (2
4) is the <br/> upper surface of the disk that is placed on the mounting frame (6) in the bottom piece (10) (12) abuts. A spring (25) is provided between the upper surface of the pressing body (23) and the lower surface of the gas spring (4).
It The other structure is almost the same as that of the first embodiment.

Next, the operation will be described. Similar to the first embodiment, when the user sitting on the chair (1) wants to adjust the seat position, he pushes down an arbitrary part of the ring (21) with his foot or the like, and the disc (12) tilts at a required angle, spherical shaped portion of the disc pressing member in contact with the top surface (12) (23) (24) is pushed up. this
Accordingly, the pressing body (23) rises in the support tube (22), the spring (25)
For vertically pushed up along the gas pressure adjusting突栓(9) to the axis X against tilting the disc (12) is突栓for regulating gas pressure
(9) will not be punished directly.

When the seat reaches a desired height , the user releases his or her foot from the ring (21) and the gas pressure adjusting plug (9)
Is returned to the original position by the stopper spring of the above on-off valve, operation of the gas spring (6) is stopped, the seat (3)
The movement stops, the pressing body (24), the upper surface of the spring descends the support tube (22) by (25), a disc (12), mounting frame
Elastically presses the top surface of the bottom piece (6) (10).

Thus, the height adjusting device H of the second embodiment
In that case, the tilted disc (12) is a gas pressure adjusting plug.
Since (9) is not directly twisted, a chair height adjusting device with few failures can be obtained.

The embodiments have been described above with reference to the drawings. However, the specific configuration is not limited to the embodiments, and even if there are changes and additions within the scope not departing from the gist of the present invention, the present invention can be applied. included.

For example, in the embodiment, the example in which the height adjusting device is used for the chair is shown, but the invention is not limited to this .
It can also be used for other furniture such as tables .

[0025]

According to the present invention, the following effects can be obtained. (a) is a devise according to claim 1, and pushed down to tilt required angle any position of the ring by a foot or the like, a disk, pressing body obtained by penetrating the shaft is tilted to the disk, the pressing body upon
Since the lower surface of the gas pressure adjusting plug is directly pressed by the spherical body at the end , the gas pressure adjusting plug must be strongly twisted.
Rather, moreover, the disk and the pressing member is moved over the bottom piece of the mounting frame on the side, since it is not <br/> departing from the upper surface of突栓for adjusting the gas pressure, contact failure it is small.

[0026] In the invention of (b) according to claim 2, up pressing the center of the pressing body is突栓for adjusting the gas pressure in the vertical direction, tilt the disc that prying the突栓for adjusting the gas pressure directly Since it does not exist, the risk of failure is low.

[Brief description of drawings]

FIG. 1 is a front view of a chair to which a first embodiment of the present invention is applied .

FIG. 2 is a sectional view of an essential part of a height adjusting device according to a first embodiment of the present invention.

FIG. 3 is a sectional view of an essential part of a height adjusting device according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a conventional chair height adjusting device.

[Explanation of symbols]

(1) Chair (3) Seat (4) Gas spring (5) Leg (5a) Upper leg (5b) Lower leg (6) Mounting frame (7) Leg rod (8) Caster (9) Gas pressure adjusting stud (10) the bottom piece (11) bolts (12) a disc (13) spherical-shaped portion (14) pressing member (15) shaft (16) threaded holes (17) holding hole (18) the operating rod (19) side walls (20 ) window hole (21) ring (22) supporting cylinder (23) pressing body (24) spherical-shaped portion (25) a spring member

Claims (2)

[Scope of utility model registration request] Around the sidewall of claim 1 Mounting frame that collision set the Ashi杆radially at the lower end of the leg, such as a chair, and bored a plurality of window opening, to the mounting frame,突栓adjusting gas pressure The lower part of the gas spring, which is on the lower side, is fitted and supported, and the spherical part on the upper surface of the pressing body is brought into contact with the lower surface of the gas pressure adjusting plug.
And attach the support shaft that is hung from the center of the lower surface of the pressing body.
A screw hole drilled in the center of the disk placed on the upper surface of the bottom piece of the frame
After being screwed in, it is tiltably inserted freely into a holding hole formed in the bottom piece of the mounting frame, and the outer ends of a plurality of operating rods whose inner ends are fixed to the peripheral part of the disk are connected to the window. Ru is projected from the hole
At the same time, a height adjusting device for a chair or the like characterized by being fixed to a ring provided concentrically with the gas spring. Around the sidewall of 2. A mounting frame that collision set the Ashi杆radially at the lower end of the leg, such as a chair, and bored a plurality of window opening, the support tube provided in the mounting frame, gas A flat plate-shaped circle that fits and supports the lower part of the gas spring with the pressure adjusting stopper downward and is placed on the upper surface of the bottom piece provided on the mounting frame.
The spherical portion on the lower surface of the pressing body is brought into contact with the upper surface of the board,
And the upper portion of the pressing member, the vertically movable fitted is allowed to support cylinder of the lower end opening, the upper surface of the pressing body, is abutted against the lower surface of突栓for adjusting the gas pressure, further to the peripheral portion of the disc the outer ends of the plurality of operating rod which is fixed an inner end portion, is protruded from the window hole, and fixed to a ring which is provided on the gas spring concentrically,
A height adjusting device for a chair or the like, wherein a spring is provided between the upper surface of the pressing body and the lower surface of the gas spring.