JPH0511790Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a rocking device for a rotating chair that can be rocked in accordance with the movement of the body without causing the feet to lift up.

[Conventional technology]

Conventionally, swivel chairs had a structure that could be rotated around a torsion bar for rocking.
This can be seen in Publication No. 61-118446, etc.

[Problem that the invention attempts to solve]

However, since the pivot point of the torsion bar is located midway in the front and back direction of the seat, in order to prevent the feet from lifting up when rocking,
The front side of the seat is structured so that it tilts forward in the opposite direction to the rear side, but when rocking, the seat bends and feels uncomfortable, and the seat and back are not integrated. Since the seat bends and locks, it has the problem that only a small amount of rocking can be achieved in the mold, making it uncomfortable to sit on.

[Means for solving problems]

The present invention solves such problems and allows for good rocking that matches the weight of the body by preventing the feet from lifting.Therefore, the tips of the pillars that form an inverted L shape are designed to prevent the feet from lifting up. The front end side of the seat frame is pivotally attached to the side via a support shaft, and the left and right front ends of the side L-shaped back frame extending from the bottom of the seat frame to the rear upper part are respectively attached to the support via torsion bars. It is pivoted near the shaft, and an elastic member is interposed between the front part of the back frame and the seat frame above it, so that the back frame has a high degree of elasticity and can move upward accurately. It is composed of

[Effect]

Therefore, since the pivot point of the seat frame is located at the front, even if the seat tilts during rocking, the legs will not be lifted up, while the back frame can move up and down with extremely flexibility and elasticity. This allows for rocking to match the body movements of the person sitting, and since the two torsion bars are used as fulcrum axes, the rocking force is softer, making for a more comfortable rocking experience. .

〔Example〕

Next, the embodiment shown in the drawings will be described. FIG. 2 shows a perspective view of the entire rotary chair, in which an inverted L-shaped leg post 1 extends from the top of a support leg 9 equipped with a gas spring 8, and a connecting frame 10 is horizontally installed on the front side.
The front end side of the pillar 1 is connected to the intermediate part of the seat body A.
The seat frame 2 made of a round pipe is formed so that its tip 2a is curved downward, and the lower portions on both sides near the tip 2a protrude above the front of the connecting frame 10. It is pivotally connected to the support pieces 11, 11 via the support shaft 3.

Reference numeral 4 denotes a back frame formed from a round pipe, and the side surface is L-shaped so as to extend from the lower part of the seat frame frame 2 to the rear upper part, and the back body B is attached to the rear upright side. Both sides of 4
Connecting bodies 13, 13 are fitted and fixed to the tips of a, 4b, respectively, and the opposite ends of both torsion bars 5, 6, which are horizontally installed in parallel, are each bent into an L shape, and both bent torsion bars 5 are bent. , 6 are fitted and fixed to both the connecting bodies 13, 13, respectively.

At both ends of the connection frame 10, there are handle bases 15, 15 each having a cover 14 connected to the outer surface thereof.
A large-diameter horizontal hole 16, formed in both handle bases 15, 15, has one end side of both torsion bars 6, 5, which are fixedly installed and are parallel to each other in the front and back within the connection frame 10, which is near the rear of the support shaft 3. 16 respectively,
Elastic member 1 fitted to the rear surfaces of both covers 14, 14
7 and 17, respectively, and insert the ends of both torsion bars 5 and 6 into both sides 4a and 4b of the back frame 4.
Elastic members 7 and 7 are respectively interposed between the upper front part of the seat frame 2 and the seat frame 2 above the seat frame 2, and the back frame 4 is mounted to move up and down while rotating around torsion bars 5 and 6. Set and configure.

At the lower center of the connecting frame 10, a front-rear screw rod 19 that is rotated by a front knob 18 is mounted as a shaft, and the tips of the torsion bars 5 and 6 are connected to metals 20 and 20 on both ends of the connecting frame 10, respectively. At the same time, there are fixed pipes 21, 21 on the tip sides of both torsion bars 5, 6 in the connection frame 10, and support pipes 22, 21 on the other side.
22 respectively, and arms 24, 24 at the ends of both fixed pipes 21, 21 are interlocked and connected to a female screw body 23 which is screwed into the screw rod 19.

In addition, shafts 27 and 28 are respectively extended from the axes of the left lever 25 and the right lever 26, which are pivotally supported on the outside of both handle bases 15 and 15, to the center of the connection frame 10, and one shaft 27 An arm 29 fixed to the end of the pillar 1 and a stopper 30 installed in the upper part of the pillar 1 are interlocked and linked via a rotary body 31 and an interlocking rod 32, and a support adjuster suspended from the lower part of the back frame 4. The tip of the stopper 30 is removably installed in each concave notch 34 of the installation plate 33, and the arm 35 is fixed to the end of the other shaft 28, and the gas spring 8 is mounted inside the pillar 1. A bell crank type actuating body 36 to be actuated is interlocked with each other via an interlocking rod 37.

Therefore, when the left lever 25 is lifted upward, each part operates as shown by the arrows in FIG. 9, and the stopper 30 moves away from the support adjustment plate 33, allowing the back frame 4 to be unlocked. , when the lever 26 on the right side is raised upward, each part operates as shown by the arrows in FIG. Each part operates as shown by the arrows in FIG. 8, and the torsion bars 5, 6, fixed pipe 21,
21 is fixed in the rotational direction, the torsion bars 5 and 6 retain force while rotating and deforming, so that the locking strength can be adjusted.

When the locking by the stopper 30 is released and the seat is locked, the front part of the seat frame 2 does not move up and down significantly, so the feet of the person sitting do not float.
5 are close to each other, and the torsion bars 5 and 6 are fitted into the large-diameter horizontal hole 16 and each has an elastic member 17 interposed therein. The actuation of the two torsion bars 5 and 6 softens the locking force, allowing for locking that matches the body movements of the sitting person.

Note that the back frame 4 can be locked in four stages by changing the engagement position with the stopper 30, but even in such a locked state, the elastic member 7 is interposed so that the user can sit with the cushion. You will be able to do that.

[Effect of idea]

In this way, with this invention, the foot does not lift up when rocking, and the rocker can comfortably rock the rocker without feeling any discomfort, and the interposition of the two torsion bars 5 and 6 makes the locking force soft and reliable. This allows the person sitting to comfortably rock according to the movement of the body, and has the feature that it can be suitably implemented as a rotating chair with good rocking properties.

[Brief explanation of the drawing]

Figure 1 is a side view of the main parts of an embodiment of the present invention;
Fig. 2 is a perspective view of the rotary chair, Fig. 3 is an enlarged sectional view of a part of Fig. 1, Fig. 4 is a plan sectional view of a part of Fig. 3, and Fig. 5 is a view from the center in the width direction. 6 is a perspective view of a portion of FIG. 1, FIG. 7 is an exploded perspective view of FIG. 1 with a portion removed, and FIG. 8 is a portion of FIG. 7. , FIG. 9 is a perspective view of a part of FIG. 5,
FIGS. 10 and 11 are explanatory views of the operations shown in FIGS. 1 and 3, respectively. 1... Pillar, 2... Seat frame, 3... Support shaft, 4... Back frame, 5, 6... Torsion bar, 7... Elastic member.

Claims (1)

[Scope of utility model registration request] The tip side of the pillar 1, which has a gas spring 8 inside and has an inverted L shape as a whole, is connected to the tip side of the seat frame via the support shaft 3, and extends from the bottom of the seat frame to the rear top. The left and right front ends of the back frame 4, which has an L-shaped side surface, are connected to a connecting frame 10 in front of the lower surface of the chair seat via torsion bars 5 and 6, respectively, and a cover with a V-shaped cross section covers the outer surface of the connecting frame. The body 14 includes an elastic member 17 connected to the torsion bars 5 and 6,
17, and an elastic member 7 is interposed between the front part of the back frame 4 and the seat frame 2 above it.