JPS646763B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a chair rocking device.

In conventional rocking devices of this type, the seat body and back body are integrated, and the back body is tilted backwards and the seat body is tilted forward at the same time, so the thighs are compressed by lifting the front part of the seat body. It also had the disadvantage that the rise in the front of the seat made it difficult for the feet to touch the floor, making it difficult to sit.

The present invention solves this problem, and as the back tilts, the front end of the seat body is tilted forward, and the rear side of the seat body also slopes in the opposite direction. This provides an extremely comfortable sitting position, and the inclination can be easily changed by switching the lever, allowing convenient implementation.

Next, the embodiment shown in the drawings will be described. Figure 1 shows a perspective view of the entire chair, with the seat body being the front seat part 1.
The chair body is divided into two parts in the front and back into a seat part a and a rear seat part 1b, and the chair body is divided into three parts by a back part 2 which stands up at the rear.

The upper end side shaft part 4 of the support leg 4 that supports the chair body
a is fitted and fixed to the rear part of a horizontal support frame 5, and a rotating frame body 12 is fitted to the rear side of the support frame 5 so as to be able to rotate within a certain range around the horizontal axis,
The chair body is supported by the rotating frame 12 and the extending side frame 5a of the support frame 5, which is integrated with the support frame 5 and framed on the front side. It is installed and configured so that the left and right sides are more symmetrical.

On one side, an integral support shaft 3 is extended from the side of the rotation frame 12 in the direction of the rotation axis, and the rear part is fixed to the lower part of the back body 2, so that the lower part of the rear seat part 1b The support shaft 3 is attached to the front side surface of the metal 13 extending to
The front end of the rotating arm 8 is fixed to the middle part of the support shaft 3, and the middle part of the rotating arm 8 in the front-rear direction is fixed to the middle part of the support shaft 3. are rotatably connected via a pin 15, and a pin 16 protruding laterally from the extending side frame 5a is fitted into the middle part of the actuating arm 9 and pivotally supported. The front end of the actuating arm 9 is connected via a pin 18 to a metal 17 fixed to the lower surface near the front, and a pin 20 fixed to the front part of the rotating arm 8 is connected to a long hole 19 formed at the rear end of the actuating arm 9.
, and a pin 21 protruding from the extending side frame 5a is fitted into the intermediate part of the arm 22 for pivotal support.
The front end of the arm 22 and the front end of the rotating arm 8 are connected via a pin 23, and the upper part of the doglegged link 10 is connected via a pin 25 to a metal 24 fixed to the rear part of the front seat part 1a. The upper part of the link 11 is connected to the metal 26 fixed to the front part of the seat part 1b via a pin 27, and the lower part of both links 10 and 11 is connected to the rear part of the arm 22 via a pin 28.

Further, one end side of the arm 30 is fitted into the torsion bar 29 protruding from the outer end side of the support shaft 3,
The tip of a locking strength adjustment lever 31 screwed into the tip of the arm 30 is configured so as to abut against the central lower surface of the metal 13.

A stepped stopper 7 is vertically provided below the back body 2 so as to be on the rear side of the support frame 5, and a recess 7 is provided on one side of the notch formed in the stepped stopper 7.
a, the middle part 7 has a cushion inside the middle part.
b, and a high section 7c with a cushion installed on the other side.
The holding frame 32 fixed to the rear part of the supporting frame 5 has supporting rods 3 that can extend and slide in the lateral direction.
At the same time, the stopper pin 34, which is fixed to the support rod 33 and extends rearward, is installed so as to fit into the notch of the stepped stopper 7, and so that it is placed below both seats 1a and 1b. Lever 6 extending to
A pin 36 hanging down from the outer end of the support rod 33 is fitted into a long hole 35 formed at the rear end, and a pin 36 is fitted at the tip of a stay 37 extending laterally from the holding frame 32 side.
It is configured so as to be pivotally supported on the rear end side of the lever 6 via the lever 8.

Therefore, if the lever 6 is operated to the position shown in (a), the stopper pin 34 will fit into the recess 7a of the stepped stopper 7, and the back body 2 will be locked, making it impossible to lock.

Also, when lever 6 is operated to the position shown in (b),
When the stopper pin 34 reaches the middle part 7b of the stepped stopper 7 and the lever 6 is operated to the position shown in (C), the stopper pin 34 reaches the middle part 7b of the stepped stopper 7.
In either state,
When the user leans against the back body 2, the back body 2 rotates around the support shaft 3 and tilts backward until the stopper pin 34 abuts against the stepped portions 7b and 7c.

In that case, since the rotating arm 8 rotates about the support shaft 3 to move the front part upward and the rear part downward, the rear seat part 1b is tilted backward, and at the same time, the operating arm 9 is moved forward. Since the front seat part 1b is rotated so as to move the front seat part downward, the front seat part 1b is tilted forward, and the arm 22 is also rotated, so that the lower end is connected to the arm 22 by the pin 28.
The links 10 and 11 connected to the front seat 1a are both lowered slightly, so that the upper part of the link 10 is connected to the rear part of the front seat part 1a by the pin 25, and the upper part of the link 11 is connected by the pin 27. Both the rear seat part 1b and the front part are slightly lowered and sunk downward.

That is, as shown in FIGS. 12 and 13, as the back body 2 is tilted backward, the front seat 1a is tilted forward with a low front and high back, and the rear seat 1b is tilted backward with a reverse slope. However, along with this, the rear part of the front seat and the front part of the rear seat connected to it both sink downwards, as mentioned above, and the posture of the seater is affected, especially in the buttocks and thighs. It provides stable support in a well-balanced manner and does not put pressure on the thighs of the person sitting, and since the soles of the feet are in contact with the floor, the lower limbs do not feel any stress. You can sit in it extremely comfortably.

In this way, the present invention divides the seat body into front and rear parts, the front seat part 1a and the rear seat part 1b, and connects the horizontal support shaft 3, which is integrated with the lower side of the back body 2, to the fixed support frame 5 on the upper part of the support legs 4.
A rotating arm 8 is installed on the lower surface side of the back body 2 of a stepped stopper 7, which is pivoted to the center of the shaft and adjusts vertical alignment by operating a lever 6, and is fixed to the intermediate side of the support shaft 3. The rear portion is rotatably connected to the rear portion of the rear seat portion 1b, and the intermediate portion of the rotating arm 8 is pivoted to the extending side of the support frame 5, so that the front portion is connected to the rear portion of the front seat portion 1a.
The rear part of the actuating arm 9 connected to the front part of the arm 22 is connected in an interlocking manner, and both links 10 and 11 respectively connected to the rear part of the front seat part 1a and the front part of the rear seat part 1b are rotatably connected to one end of the arm 22. However, since the other end of the arm 22 is operatively connected to the front part of the rotating arm 8, as the back body 2 inclines, the front seat part 1
A can be operated in a forward tilted state, and the rear seat part 1b can be operated in a reverse tilted state, and in this case, the rear part of the front seat part and the front part of the rear seat part Both of the parts are slightly lowered, as if sinking downwards, so that the shape of these parts harmonizes well with the buttocks and thighs, and also provides stable support for the seater without putting pressure on the thighs. It provides a seat surface, and since the soles of the feet are in contact with the floor surface, the load on the lower limbs is also relieved, making it possible to sit comfortably, and the inclination can be easily adjusted by switching the lever 6. It has the feature that it can be carried out suitably.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is a perspective view of the entire chair, Fig. 2 is a side view of a part thereof, Fig. 3 is a side view of the main part, and Fig. 4 is only one half of the chair. 3, FIG. 5 shows a part of FIG. 4, FIG. 6 shows a side view of FIG. 5, FIG. 7 shows a part of FIG. 8 shows a part of FIG. 7, FIG. 9 shows a part of FIG. 4, FIG. 10 is a side view of FIG. 9, and FIG. 11 is a view taken along the - line of FIG. FIG. 12 and FIG. 13 show operation explanatory diagrams, respectively. 1a... Front seat part, 1b... Back seat part, 2... Back body, 3... Support shaft, 4... Support leg, 5... Support frame, 6
... Lever, 7 ... Stepped stopper, 8 ... Rotating arm, 9 ... Operating arm, 10, 11 ... Link.

Claims (1)

[Claims] 1 The seat body is divided into front and rear parts into a front seat part 1a and a rear seat part 1b, and a lateral support shaft 3 is integrated on the lower side of the back body 2.
is pivoted to a fixed support frame 5 on the upper part of the support leg 4, and a stepped stopper 7 is installed on the lower surface side of the back body 2, which adjusts the vertical alignment by operating a lever 6.
The rear part of a rotating arm 8 whose intermediate side is fixed to the support shaft 3 is rotatably connected to the rear part of the rear seat part 1b, and the intermediate part is connected to the front part of the rotating arm 8 by an extension of the support frame 5. Both links 10 link the rear part of the operating arm 9, which is pivoted on the exit side and whose front part is connected to the front part of the front seat part 1a, and respectively connect the rear part of the front seat part 1a and the front part of the rear seat part 1b. , 11 are rotatably connected to one end of an arm 22, and the other end of the arm 22 is operatively connected to the front part of the rotating arm 8.