JPH1066629A - Movable chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movable chair provided with a pendulum supporting body for not practically damaging the appearance of a chair for which a spring device is miniaturized. SOLUTION: A seat part 18 provided with a seat plate 19 is arranged on a stand structure body 10b and the seat part 18 is attached to the pendulum supporting body 17 to be turned with the hinge 16 of the stand structure body 10b as a center. The pendulum supporting body 17 is drawn to a center position by the spring device 22. The spring device 22 is fixed to the upper part of the stand structure body 10b and is provided with tension springs 23 and 24 crossed with each other or extended from the stand structure body 10b in an opposite direction. Also, the spring device can be provided in the foot part of the stand structure body for attaching the pendulum supporting body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable chair having a seat portion supported on a stand structure so as to be pivotable about an axis.

[0002]

2. Description of the Related Art There is known a movable chair in which a seat can be tilted so that a person sitting in a chair can change his / her posture by changing a sitting position and reduce a burden on a spine. Generally, such a movable chair can take a posture of sitting straight and a posture of leaning backward. Further, a movable chair in which a backrest can be rotated with respect to a seat plate is also known. Known movable chairs have sophisticated springs and adjustment mechanisms, and have limited mobility in the sense of reducing the burden on the spine.

[0003] From German Patent Publication No. 1554179, an armchair is known which acts as a rocking implement. This is a chair with a flat foot structure made of two T-shaped rails. The foot structure has an upright pendulum support hingedly attached thereto, with another hinge at the upper end connecting the pendulum support to the seat plate. The other hinge can be tightened by tightening a screw. In front of and behind the pendulum support are tension springs that connect the foot structure and the seat plate and pull the seat plate at a central position where the pendulum support is vertical. The occupant can swing about the lower junction of the pendulum support. This rocking device is intended for use as an armchair, and the height of the seat corresponds to the height of the armchair.

[0004]

The conventional movable chair has a disadvantage that it has a complicated spring configuration and is not excellent in aesthetic appearance.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a movable chair which includes a pendulum support, has a small spring device, and does not substantially impair the appearance of the chair. Aim.

[0006]

According to the movable chair of the present invention,
A seat is mounted on a pendulum support that is pivotable about a horizontal hinge provided on a stand structure and assumes a substantially vertical position when no load is applied. The pendulum support
It is elastically urged to the no-load position by a spring device,
When a load is applied, it can swing back and forth. In a straight (vertical) sitting position, the body mass of the occupant is transmitted vertically to the hinge and stand structure by the pendulum support without producing a force that causes the pendulum support to deviate from its unloaded position. When tilted forward, the seat plate is tilted forward and downward with respect to the spine of the seated person so that a particularly good pelvic tilt position is obtained when in the writing position. When leaning backwards, a relaxed sitting position is obtained. The operation of the spring device causes the seat to pivot about the no-load position and automatically return to the no-load position.

During the pendulum movement of the pendulum support, there is another advantage that not only the seat plate tilts to a different tilt position, but also the entirety moves forward when leaning forward, that is, approaches a desk or the like. On the other hand, in the reclined rear position, the entire seat plate moves rearward, that is, a space is formed around a person sitting away from the desk and sitting at the no-load position.

[0008] The movable chair has been found to be suitable for both work and rest and is comfortable. In particular, it is sometimes suitable as a relaxing work chair, and is also particularly suitable as a school chair. Another important advantage lies in the simple structure, in which the seat is connected to the stand structure only by vertical pendulum supports.

The spring device of the present invention comprises a tension spring fixed to the top of the stand structure protruding from the ground and crossing each other or extending in the opposite direction from the stand structure. Therefore, the spring device is located exclusively near the seat plate, most of which is covered by the seat plate. The springs of the seat plate extend substantially horizontally, i.e. the horizontal elements are larger than the vertical elements. Therefore, the direction in which the tension spring extends mainly corresponds to each moving direction of the seat portion. Since the vertical length of the spring device is substantially smaller than the length of the pendulum support, the spring device is small and is relatively flat below the seat plate.

Instead of a spring arrangement with two springs operating in opposite directions, a leaf spring or a torsion spring may be used.

In another embodiment of the present invention, the pendulum support comprises:
The height adjustment function is added by being attached to the height-adjustable support member of the stand structure or being made adjustable in length. In this way, movable chairs, especially those used as work chairs, are very well adapted to the height of the occupant or special requirements without any height adjustment affecting the operation of the pendulum support. obtain.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings showing the embodiments. The movable chair of FIG. 1 stands still on the ground and includes a stand structure 10 having a total of four feet but showing only the feet 11 and 12 in the drawing. Foot 1
1 and 12 form a bow-shaped bracket 13, the supports of which are firmly connected by long rods 14. Extending between the two long bars 14 is a horizontal bar 15 with a horizontal hinge 16 to which a vertical pendulum support 17 is mounted vertically. Pendulum support extending above bracket 13
A seat 18 having a seat plate 19 and a backrest 20 is attached to the top of 17. The seat plate 19 and the backrest 20 of the seat portion 18 are integrally formed via a curved portion 21 projecting rearward, and the backrest 20 has elasticity with respect to the seat plate 19.

The pendulum support 17 is T-shaped, ie, a vertical bar and a horizontal bar 17 extending forward and backward therefrom.
a and

Spring device with intersecting tension springs 23, 24
22 biases the pendulum support 17 to its vertical, unloaded position. One end of each of the tension springs 23 and 24 is connected to the top of the stand structure 10, and the other end is connected to the horizontal bar 17a or the lower surface of the seat plate 19. The vertical length of the spring device 22 is less than half the length of the pendulum support 17. Seat plate 19
Is screwed to the horizontal bar 17a.

In FIG. 1, the front inclined position of the seat portion 18 is 18a.
, And the rear tilt position is 18b, both of which are indicated by dashed lines. The pivoting movement of the pendulum support 17 about the hinge 16 is limited by the stops of the stand structure 10.

FIG. 2 shows that the stand structure 10a is a roll 25
An embodiment in the case of a pedestal structure of a swivel chair formed above is shown. The pendulum support 17 is located at the center column 26 of the pedestal structure.
Is supported so as to turn around the axis 16 of the motor. The shaft 16 extends in the lateral direction corresponding to the seat plate 19. Horizontal bar
17a is slightly inclined with respect to the vertical part of the pendulum support 17, so that the seat plate 19 is also slightly inclined when in the no-load position.

A holder 27 is further attached to the column 26 of the rotary pedestal, to which an end of a spring forming the spring device 22 is fixed.

FIG. 3 shows a movable chair in which the stand structure 10b has a foot member 30 standing upright on a roll 25 on the ground.
A pipe-shaped support member 31 for height adjustment is attached to the pillar of the foot member 30. The pendulum support 17 is fixed by a horizontal hinge 16 at the lower end of the support member 31. Pendulum support 17
Are two arms 17a, 17b rigidly connected in a V-shape.
And the connection is located in the hinge 16. Arm 17a
, 17b are securely fixed to the lower surface of the seat plate 19.

According to FIG. 3, the spring device 22 comprises two tension springs 23, 24 extending in opposite directions from the upper end of the support member 31, the ends of which are fixed to the seat 18. . Tension springs 23, 24 extending in opposite directions from support member 31 do not necessarily mean that these springs are linear, one spring extending to the left and the other spring extending to the right. means.

In the embodiment of FIG. 3, a substantially horizontal tension spring 2 is provided.
A spring device 22 including 3 and 24 is attached to a position directly below the seat plate 19 and at the upper end of the stand structure 10 including the foot member 30 and the support member 31.

As another alternative to the embodiment shown in FIG.
The arms 17a, 17b of the pendulum support 17 may be connected to the seat plate via hinges. Furthermore, instead of a single V-shaped pendulum support, it is also possible to provide two pendulum supports with separate lower hinges.

[0022]

As described above, the movable chair according to the present invention is
A pendulum that is pivotable about a horizontal hinge provided on the stand structure and is biased by a spring device having a tension spring that extends across or in an opposite direction so as to assume a substantially vertical position when no load is applied. The present invention has excellent effects such as providing a support and supporting the seat portion with a pendulum support so that the spring device is small and does not substantially impair the appearance of the chair.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a movable chair of the present invention designed as a four-legged chair.

FIG. 2 is a schematic side view showing a movable chair of the present invention as a swivel chair.

FIG. 3 is a schematic side view showing the movable chair of the present invention having a height adjusting function.

[Explanation of symbols]

 10, 10a, 10b Stand structure 17 Pendulum support 17a, 17b Arm 18 Seat 18a Front tilt position 18b Back tilt position 19 Seat plate 22 Spring device 23, 24 Tension spring 31 Support member

Claims (6)

[Claims] 1. A stand structure (10, 10a, 10) in which a seat portion (18) having a seat plate (19) is provided so as to pivot about an axis.
b), and the seat (18) is provided with a stand structure (10, 10a,
10b) at least one pendulum support (1
7), the pendulum support (17) being biased to a central position by a spring device (22) and between a forward tilt position (18a) and a rear tilt position (18b), In a pivotable swivel chair, the spring device (22) is fixed to the top of a stand structure (10, 10a, 10b) which rests on the mounting surface and intersects with each other or in the opposite direction from the stand structure. A movable chair comprising tension springs (23, 24) extending therefrom. 2. The pendulum support (17) is a stand structure.
2. The movable chair according to claim 1, wherein the movable chair is fixed to a height-adjusting support member of the height adjustment member. 3. The movable chair according to claim 1, wherein the pendulum support is adjustable in length. 4. The pendulum support (17) is V-shaped, and the support member (31) of the stand structure (10b) is a stand structure.
4. A device according to claim 1, wherein said spring device protrudes between two arms forming said first and second arms, said spring device being fixed to said support member. The movable chair described in Crab. 5. The device according to claim 1, wherein the vertical length of the spring device (22) is less than half the length of the pendulum support (17). The movable chair described in Crab. 6. The movable chair according to claim 1, wherein the pivot angle of the pendulum support (17) is at least 10 degrees in the forward inclined position.