JPS6320358Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a reclining seat in which the seat back is configured to be rotatable relative to the seat cushion, and in particular, when the return speed of the seat back is fast, the seat back can be temporarily held in an upright position. The present invention relates to a reclining seat equipped with a locking mechanism that can lock the seat.

Reclining seats are widely used in various fields including vehicle seats because the inclination angle of the seat back can be freely adjusted according to the body shape and preference of the occupant. By the way, the problem with this type of reclining seat is:
The speed at which the seat back is returned varies depending on the inclination angle of the seat back, and the speed is particularly fast when returning from a fully reclined state.
The seat back suddenly falls forward, causing problems in terms of operability, such as requiring the operator to handle the seat with care. In particular, the sudden return motion of the seat back as described above is not desirable from the standpoint of safety, and it is desired that some kind of countermeasure be taken.

The purpose of the present invention is to sense the speed of the seat bag during its return operation with a simple configuration,
To provide a reclining seat that is superior in terms of operability and safety by configuring the seat converter to be temporarily locked in an upright position when the seat converter moves suddenly. This will become clearer from the detailed description below with reference to the drawings.

1 to 5 a and b show an embodiment of the reclining seat according to the present invention,
In these figures, the reclining seat, designated as a whole by reference numeral 1, is composed of a seat cushion 2 and a seat back 3 rotatably supported on the back side of the seat cushion 2. This seat back 3 is attached to one side of the seat cushion 2. It is fixed to an arm 5 protruding from a rotation support part 4 disposed on the back side of the unit. Here, the arm 5 is rotatably supported in the rotary support part 4, and there is a locking mechanism that locks the arm 5 at a predetermined tilt angle position, and a locking mechanism that locks the arm 5 at a predetermined inclination angle position, and a locking mechanism that locks the arm 5 at a predetermined inclination angle position. It has a built-in recovery mechanism that rotates it to the front side. That is, when the seat back 3 is sequentially tilted toward the back side, the spring member of the recovery mechanism is put into a stored state, and when the locking mechanism is released, the seat back 3 is moved by the stored biasing force via the arm 5. It is rotated back toward the front of the seat 1.

Now, according to the present invention, as shown in Figure 1,
When the seat bag 3 returns from a state where the inclination angle is close to the upright position, the storage force is small and the return speed is slow. It is characterized by a simple locking mechanism that can solve problems caused by large forces and rapid return speeds. That is, the locking mechanism that characterizes the present invention detects the sudden rise of the seat bag 3 from the state shown in FIG. In order to ensure safety, if the return speed is slow as shown in Figure 1, the seat bag 3 is rotated in the same state so that it falls forward (as shown by the dashed line in the figure). The locking mechanism is configured to operate as a selective locking mechanism.

To explain this in detail with reference to FIG. 3 and subsequent figures, first and second engagement protrusions 10a and 10b protrude upward at a predetermined angular interval on the top of the rotation support part 4 on the side of the seat cushion 2. Lock plate 1 with
0 is placed. In this lock plate 10, a groove formed between both engaging protrusions 10a and 10b functions as a locking groove 10c for locking a lock lever, which will be described later.

On the other hand, at a position corresponding to the lock plate 10 on the arm 5 on the side of the seat bag 3, the first engagement protrusion 1 is provided when the seat bag 3 returns.
A lock lever 11 having a substantially L-shape and having a first engaging portion 11a on one end side that engages with the lock lever 11 is rotatably supported. This lock lever 11 is always biased in the engaging direction by a coil spring 12 interposed between the other end and the arm 5. Further, at the other end of the lock lever 11, the first engaging portion 11a engages with the first engaging protrusion 10a of the lock plate 10 and is rotated against the biasing force of the coil spring 12. A second engaging portion 11b is formed which sometimes faces into the locking groove 10c of the lock plate 10.

The locking mechanism with such a configuration operates as follows.

That is, when the seat bag 3 approaches the upright state during the return operation of the seat bag 3, the first engaging portion 11a of the lock lever 11 engages with the first engaging protrusion 10 of the lock plate 10 on the fixed side.
a, the lock lever 11 is rotated counterclockwise in the figure against the biasing force of the spring 12, as shown in FIG. It faces into the stop groove 10c.

What should be noted here is that when the seat bag 3 suddenly rises from the fully reclined state as shown in FIG. As shown in FIG. 5a, the second engaging portion 1
1b facing the locking groove 10c, rotate the second
It is to be engaged and locked with the engaging protrusion 10b of. The seat bag 3 is then temporarily locked in the upright position, as shown in FIG. However, this locked state is temporary, and when the lock lever 11 is rotated to recover by the spring 12, the locked state is released and the seat back 3
falls forward.

On the other hand, as shown in FIG. 1, when the return speed of the seat bag 3 is slow, the lock lever 1 due to the spring 12 is
Since the restoring rotational speed of the seat bag 1 is fast, the above-mentioned locked state does not occur, and the seat bag 3 is rotated at the same rotational speed until it falls forward.

Therefore, according to such a configuration, the return movement of the seat back 3 can be adjusted depending on the speed of return of the seat back 3, thereby improving operability and safety. It becomes possible to obtain a sheet.

It should be noted that the above description merely shows one embodiment of the present invention, and it is obvious that the structure, shape, etc. of each part can be modified and changed in various ways without departing from the spirit of the present invention. . For example, lock lever 1
The biasing member for biasing the coil spring 1 is not limited to the coil spring 12 shown in the embodiment, but it goes without saying that a more general spring member may be used.

As explained above, according to the reclining seat according to the present invention, the lock plate having the first and second engaging protrusions and the locking groove is disposed on the rotation support part on the seat cushion side, and Since the lock lever has first and second engaging parts on the seat back side and is biased in one direction by a spring, the lock lever is pivoted, so despite the simple and inexpensive structure, the seat back The return operation can be performed appropriately and with excellent safety, which has great practical effects.

[Brief explanation of the drawing]

The figure shows an embodiment of the reclining seat according to the present invention, FIGS. 1 and 2 are side views of the seat explaining the return operation of the seat bag, and FIG.
The figure is an enlarged schematic diagram showing the essential parts of the present invention, and FIGS. 4 and 5 a and 5 b are explanatory diagrams of its operation. In the figure, 1... Reclining seat, 2... Seat cushion, 3... Seat back, 4... Rotating support part, 10... Lock plate, 10a, 1
0b...first and second engaging protrusions, 10c...
Locking groove, 11...Lock lever, 11a, 11b
. . . first and second engaging portions, 12 . . . spring member.

Claims (1)

[Scope of utility model registration request] In a reclining seat in which a seat back is configured to be rotatable with respect to a rotary support section provided on the seat cushion side, a reclining seat is arranged on the top side of the rotary support section and protrudes upward at predetermined angular intervals. a lock plate having first and second engaging protrusions, a first engaging part on one end side that engages with the first engaging protrusion of the lock plate when the seat bag returns, and a spring; A second engaging portion provided at the other end is biased by the member in the direction of engagement, and is rotated against the biasing force during the engagement to engage the first and second engaging portions of the lock plate. 1. A reclining seat comprising: a lock lever pivotally supported on the seat back side so as to face into a locking groove formed between engaging protrusions of the reclining seat.