JPS638294Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a locking device for a rotating chair.

In other words, when a person is sitting on a chair and leaning back, the sitting body tilts and the relative angle between the sitting body and the back increases, causing the back to tilt significantly. The seat has a good rocking posture that allows you to sit comfortably without straining, the cushioning properties of the sitting body are good, and the seat returns to its normal position easily.It has a simple structure with fewer parts and is easy to manufacture. It is provided to enable suitable implementation.

Next, the embodiment shown in the drawings will be described.

Fig. 1 shows a side view of the rotating chair, in which each caster 8 is installed at the lower part of the leg stand 1a which is connected to the lower part of the supporting leg 1 which is set upright. A support arm 3 is provided by extending a support frame 2 to the front side and having a back body 9 connected to the upper part to form a dogleg shape on the side.
The lower end of the support frame 2 is rotatably connected to the rear part of the support frame 2 above the support leg 1 via a fulcrum pin 4.

Further, reference numeral 5 denotes a seat body, which is formed to extend from above the support frame 2 to above the lower part 3a of the support arm 3, and has a connection between the front lower surface of the seat body 5 and the front end upper surface of the support frame 2. Elastic bodies 6 and 7, which can be deformed and restored, are interposed between the lower surface of the rear side of the seat body 5 and the upper surface of the lower part 3a of the support arm 3, which is slightly rearward than the fulcrum pin 4. , the upper and lower portions of the elastic bodies 6 and 7 are respectively secured to each other via locking bodies 10.

Therefore, when sitting on the back body 9 without leaning on the backrest, the situation is as shown in FIGS. 1 and 2,
When you lean back on the back 9 and get into a rocking posture,
The state shown in FIGS. 3 and 4 is reached.

That is, in the rocking posture, the inclination angle of the seat 5 slightly increases from the angle θ ₁ to the angle θ ₂ , and the relative angle of the back body 9 to the seat 5 reaches an angle α ₂ that is larger than the angle α ₁ . In addition, as shown in FIG. 4, both elastic bodies 6 and 7 are deformed.

Therefore, the backrest is formed in a rocking posture with the waist stretched out, and the elastic body 6 is deformed.
The cushioning properties of the seat body 5 are improved by the support by the elastic bodies 6 and 7, and when the sitting posture returns to normal, the elastic bodies 6 and 7
By restoring , it is possible to return to the postures shown in FIGS. 1 and 2.

In this way, the present invention extends the support frame 2, which is high in the front and low in the rear, from the upper end of the upright support leg 1 to the front side, and the lower end of the back body support arm 3, which has a dogleg shape on the side, is attached to the support leg 1. The fulcrum pin is pivotally connected to the upper side via a fulcrum pin 4, and is located between the front upper surface of the support frame 2 and the lower surface of the front part of the seat body 5, which is forward of the fulcrum pin 4, and the fulcrum pin. Elastic bodies 6 and 7, which can be deformed and restored, are interposed between the upper surface of the lower side of the support arm 3, which is slightly rearward than 4, and the lower surface of the rear part of the seat body 5, respectively, and the upper and lower sides are respectively engaged. , when sitting on a chair and leaning back, the seat body 5 is gently tilted and the back side is tilted greatly,
This means that you can sit comfortably with a good rocking posture without putting strain on your lower back, and the support of the deformable elastic bodies 6 and 7 provides good cushioning, and when the posture returns to normal, the elastic bodies 6 and 7 It has the advantage that it can be restored well by restoration, has a simple structure with a small number of parts, is easy to manufacture, and can be suitably implemented.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the rotary chair, Fig. 2 is an enlarged view of a part thereof, and Figs. 3 and 4 are explanatory views of the operation of Figs. 1 and 2. 5 and 6 are explanatory diagrams showing the angles of FIG. 1 and FIG. 3, respectively. 1... Support leg, 2... Support frame, 3... Support arm, 4... Fulcrum pin, 5... Seat body, 6, 7... Elastic body.

Claims (1)

[Scope of utility model registration request] A supporting frame 2 with a high front and low rear is extended forward from the upper end of the supporting leg 1 erected, and the lower end of the back support arm 3 having a dogleg shape on the side is attached to the upper side of the supporting leg 1 with a fulcrum pin. 4, between the front upper surface of the support frame 2 and the lower surface of the front part of the seat body 5, which is located forward of the fulcrum pin 4, and slightly rearward of the fulcrum pin 4. A rotary chair characterized in that elastic bodies 6 and 7, which can be deformed and restored, are interposed between the upper surface of the lower part of the support arm 3 and the lower surface of the rear part of the seat body 5, respectively, and are respectively connected at the upper and lower ends. Locking device.