JPH0223169B2 - - Google Patents

Description

[Detailed Description of the Invention] In the present invention, the backrest can be reclined only when a person is sitting down, and when a person stands up while reclining, the backrest automatically returns in conjunction with the automatic raising of the seat cushion. It is an object of the present invention to provide a chair that automatically forms an evacuation route in an emergency in horizontally connected reclining seats installed in airplanes, vehicles, theaters, etc.

The embodiment shown in the drawings will be specifically described.
FIG. 1 shows a state in which three chairs are connected, and each chair is assumed to be raised and lowered by a mechanism in the right armrest.

1 is a seat cushion, 2 is a backrest, 3 is an armrest, and 4 is a base that supports these items. The seat cushion 1 has a tilting lever 5 fixed on both sides thereof, which is freely rotatably supported by a shaft 6 that is passed between the left and right armrests and does not rotate. By means of a coil spring 7 fixed at 6, the seat cushion is always placed in the upright position indicated by the chain line 1' in FIG.

The reclining mechanism of the backrest 2 is activated by pulling up the button 9 on the front of the armrest 3, which activates the lock release member 12 at the rear end of the lever 10, which releases the L-shaped lever 13 provided on the backrest 2 and the armrest frame 3a. The lock mechanism 14 installed between the two is released. Then press Seizuri 2 and knock it down.
When the button 9 is released, the lock mechanism 14 locks it in the tilted position.

5 to 7 illustrate the backrest locking mechanism 14. In FIG. 5, when the member 12 is pushed down by the lever 10, it returns around the fulcrum shaft 35 and rotates to the left in the figure against the force of the spring 36. The gourd 37 moves out of the barrel 40, releasing the rack 38 and its extension rod 39. Therefore, the L-shaped backrest lever 13 connected to the rod 39 becomes free, allowing the backrest 2 to be raised and lowered. 41 is a backrest spring.

FIG. 6 illustrates a universal key lock mechanism in which the hole 12a of the member 12 is frictionally engaged with the upper part of the rod 39 obliquely.

FIG. 7 shows a piston cylinder mechanism 42, 43 in which a member 12 operates an on-off valve 45 in a communication hole 44 of a fluid chamber 43a, 43b on both sides of a piston 42 that is integral with a rod 39.

The present invention links such an automatic standing up seat cushion with a backrest reclining mechanism, so that the backrest can be reclined only when the user is sitting down, and when the user stands up while still reclining, the backrest also returns automatically. .

To explain the illustrated example, when the seat cushion 1 is sat down and folded down, a lever 19 that swings from being pushed up is provided on the raising lever 5, and the swinging lever 19
and the lowering side 19a of the reclining lever 1.
An interlocking rod 20 is provided between the seat cushion 1 and the seat cushion 1, and when the seat cushion 1 is in the reclined position, the interlocking rod 20 descends by the action of the spring 21 or its own weight to release the reclining lever 10 and enable the reclining operation, and the seat cushion 1 returns to the upright position. Then, the lowering side 19a of the released swing lever 19 is pulled up by the return spring 22 and swings in the opposite direction, pushing up the interlocking rod 20 and swinging the reclining lever 10 to the reclining lock release position. It is configured to allow

In the figure, 23 is a receiving frame for the seat cushion support shaft 6 attached to the armrest frame 3a, and 24 is a receiving member that supports the shaft 6 on the receiving frame 23 in a non-rotating manner, for example, by square fitting 24, 25.
let 26 is a fulcrum shaft of the swing lever 19, which is fixed to the end of the square shaft 25, for example. 27 is the swing lever 19
An interlocking pin provided in the support frame 23 projects through the long hole 28 of the seat cushion 1 to the side of the tilting lever 5 of the seat cushion 1.
30 and 31 are cushion members that hold the interlocking pin 27 slightly below the upper end of the long hole 28 so that the connecting pin 27 does not hit the upper end of the elongated hole 28 and make a sound when sitting on the cushion 1; 32 is a cushion member of the interlocking rod 20; It is a sliding guide tube.

In the above configuration, when a person is sitting, the seat cushion raising/lowering lever 5/swinging lever 19 swings counterclockwise from the solid line position in FIG. 3 to release the connecting rod 20. Therefore, since the reclining lever 10 is free, it is operated with the button 9 to push down the release member 2 in the illustrated example to release the locking mechanism 14, so push it with your back and move the backrest 2 to the stoppers 15, 15.
It is possible to recline within the range determined by a. When button 9 is released, it is locked in the reclined position as described above.

When a person stands up, the seat cushion 1 is raised by the return spring 7. The swinging lever 19 released by the tilting lever 5 swings clockwise by the spring 22 to the position indicated by the chain line in FIG. . Therefore, the reclining lock release member 12
The locking mechanism 14 is released, and the backrest 2 is quickly returned to its original position by the action of the fluid or spring.

That is, when a person stands up, the seat cushions and backrests of all the chairs automatically return, so a passage is automatically formed and the above purpose is well achieved.

[Brief explanation of drawings]

Figure 1 is a front view of the connecting chair, Figure 2 is a side view,
FIG. 3 is a front view of the present invention, FIG. 4 is an exploded perspective view of a portion thereof, and FIGS. 5 to 7 are longitudinal sectional views of the backrest locking mechanism. 1 is the seat cushion, 2 is the backrest, 3 is the armrest, 5 is the lever for raising and lowering the seat cushion, 6 is its shaft, 9 is the backrest reclining button, 10 is the backrest lock release lever, 14
1 is a lock mechanism, 19 is a swing lever, and 20 is an interlocking rod.

Claims (1)

[Scope of Claims] 1. A seat cushion that is supported on a horizontal axis so that it can be tilted up and down and is equipped with an automatic upright spring, a locking mechanism that stops the backrest with adjustable reclining angle in its reclined position, and a locking mechanism that releases the lock and locks it. In a chair consisting of a reclining backrest equipped with a lock release lever for returning to the standing position, a lever is provided that swings when pushed by the lifting lever when the seat cushion is folded down to the sitting position. An interlocking rod is provided between the lowering side of the lever and the above-mentioned lock release lever, and when the seat cushion is raised, the above-mentioned swinging lever is also returned by a spring, and the upper interlocking rod is moved, causing the lock release lever to move in the lock release direction. An automatic return device for the seat cushion and backrest of a chair that is linked to work properly.