JPS6127476Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle seat reclining device. More specifically, the present invention relates to a seat reclining device in which a seat reclining device incorporating a forward tilting mechanism is provided with a return position storage mechanism.

The seat backs of the front seats for two-door vehicles are folded forward to make it easier for passengers to get in and out of the rear seats. Therefore, in conventional seat reclining devices, since the front seat occupant is seated,
When the seat back is raised from a forward position, readjustment is required to obtain the optimal standing position prior to the forward position.

In order to eliminate the drawbacks of the prior art, the present invention has a storage mechanism that not only locks the seat bag at a pre-memorized position when it is folded forward and then stands up, but also allows the storage position to be easily changed as necessary. An object of the present invention is to provide a seat reclining device provided with a seat reclining device.

Hereinafter, embodiments of the present invention will be described based on the drawings.

The seat cushion base 1 is formed of a flat plate and has an opening 1a approximately in the center, and a shaft 1b is fixed perpendicularly to the seat cushion base 1 through the opening 1a. Further, the seat cushion base 1 is provided with through holes 1c, 1c, and the through holes 1c, 1c are provided with through holes 1c, 1c.
It is fixed to the seat cushion frame (not shown) with bolts or the like via 1c.

The seatback arm 2 is also formed of a flat plate,
The shaft 1b has an opening 2a at the bottom, and the shaft 1b loosely passes through the opening 2a, so that it is rotatably supported with respect to the seat cushion base 1, and is supported by a bolt or the like. The seat back arm 2 is fixed to the seat back frame (not shown) through through holes 2b, 2b formed in the seat back arm 2. Further, the seat back arm 2 has a plurality of latch gears 2c and a plurality of recesses 2d formed in an arc shape around the opening 2a.

Next, the stopper 3 is provided with a tooth portion 3a formed to mesh with the latch gear 2c of the seat back arm 2 and an opening 3b, and the opening 3b passes through the opening 1d formed in the seat cushion base 1. The pin 1e fixed perpendicularly to the seat cushion base 1 passes loosely, so that the pin 1e
It is rotatably supported around the center. The rotation of the stopper 3 is restricted by coming into contact with a cut-and-raised portion 1f formed on the seat cushion base 1.

The operating lever 4 has a through hole 4a, and the through hole 4
A pin 1h fixed perpendicularly to the seat cushion base 1 passes freely through the opening 1g formed in the seat cushion base 1, so that the seat cushion base 1 can be rotated about the pin 1h. supported. The operating lever 4 also has openings 4b and 4c, into which pins 4d and 4e are installed vertically, and whose ends abut against a cam plate 5b, which will be described later. A contact portion 4f for rotating the device 5 is provided. Note that the pin 4d is inserted into a long hole 1 formed in an arc shape in the seat cushion base 1.
i, and restricts the movement of the operating lever 4.

The storage device 5 includes a latch gear 2c formed on the seat back arm 2 and a tooth portion 3 of the stopper.
a memory plate 5a having a bent portion 5d disposed between the memory plate 5a and a through hole 5e approximately in the center;
It also consists of a substantially heart-shaped cam plate 5b having a through hole 5f and a cam portion 5k in the center, and protrusions 5h, 5h provided on the cam plate 5 in openings 5g, 5g, 5g formed in the memory plate 5a. , 5h, the cam plate 5b is fixed to the memory plate 5a. Further, the back surface of the memory plate 5a of the storage device 5 is provided with a convex portion 5i that fits into the concave portion 2d of the seat back arm 2, and is constantly pressed against the seat back arm 2 by a spring washer 5c. . Note that when the storage member 5 rotates the operating lever 4 and the contact portion 4f of the operating lever 4 contacts the top portions 5o, 5o formed on the cam portion 5k of the storage device 5, the bent portion 5d
The end 5j is the end 3f of the tooth 3a of the stopper 3.
It is configured so that it can be rotated to a position that substantially coincides with the position shown in FIG.

Next, 6 is a holder plate, and the holder plate 6 has through holes 6a, 6b, 6c, into which the shaft 1b and pins 1e, 1h are inserted, and the pins 1e, 1h are inserted into the through holes 6a, 6b, 6c. By caulking the ends, the aforementioned seat back arm 2, stopper 3, operating lever 4 and storage device 5 are held between the seat cushion base 1 and the holder plate 6. The holder plate 6 has a hook portion 6d, and one end of the spring 7 is connected to the hook portion 6d, and the other end is connected to the pin 4d of the operating lever 4, so that the operating lever 4 can be rotated counterclockwise. It is constantly energized in the direction. Note that the central opening 6e is formed for the purpose of weight reduction.

Reference numeral 8 denotes a spiral spring whose one end is fitted into the groove 1j of the shaft 1b fixed to the seat cushion base 1, and whose other end is locked to the cutout 2e formed on the seat back arm 2. , the spiral spring 8 biases the seat back arm 2 against the seat cushion base 1 in a counterclockwise direction.

The snap ring 9 fits into a fitting groove 1k formed in the shaft 1b, and locks the spiral spring 8 so that it does not fall off the shaft 1b.

Next, the operation of the seat reclining device of this embodiment will be explained.

In the locked state shown in FIG. 2, the pin 4d of the operating lever 4 contacts the portion 3c of the stopper 3, and the urging force of the spring 7 presses the stopper 3 clockwise. For this reason, the latch gear 2c of the seatback arm 2 and the tooth portion 3a of the stopper 3
The seat back arm 2 cannot rotate in either direction.

From this state, when the operating lever 4 is rotated against the spring 7 to the position shown in FIG. 4 where the pin 4d of the operating lever 4 and the portion 3c of the stopper 3 come out of contact (hereinafter referred to as the non-meshing position), The stopper 3 rotates counterclockwise due to its own weight, and the latch gear 2c and the teeth 3a of the stopper 3 are disengaged from each other. In addition, if the stopper 3 does not rotate due to its own weight,
Pin 4e of operating lever 4 is part 3 of stopper 3
By coming into contact with d, the stopper 3 is forcibly rotated, and the engagement between the latch gear 2c and the tooth portion 3a of the stopper 3 is disengaged. Furthermore, stopper 3
The rotation of the stopper 3 is restricted by the contact between the portion 3c and the cut-out portion 1f of the seat cushion base 1. As the stopper 3 rotates, the latch gear 2 of the seat back arm 2
When the tooth portion 3a of the stopper 3 is disengaged, the seat back arm 2 is rotated counterclockwise around the shaft 1b by the spring force of the spiral spring 8. Note that in this state, pin 4e
There is a certain distance between the stopper 3 and the portion 3d of the stopper 3.

On the other hand, since the protrusion 5i of the storage device 5 is fitted into the recess 2d of the seat back arm 2, the storage device 5 also rotates integrally with the seat back arm 2. Therefore, when the operating lever 4 is returned to its original position with the seat back arm 2 tilted forward as shown in FIG. Therefore, the stopper 3 is pressed clockwise. However, there is a bent portion 5d of the memory plate 5a between the latch gear 2c of the seat back arm 2 and the tooth portion 3a of the stopper 3.
Since the tooth portion 3a of the stopper 3 comes into contact with the bent portion 5d, the latch gear 2 of the seat back arm 2
c and the teeth 3a of the stopper 3 cannot mesh with each other.

When the seatback arm 2 is rotated clockwise from this state against the spring force of the spiral spring 8, the storage device 5 also rotates integrally with the rotation of the seatback arm 2. Then, when the seat back arm 2 is rotated to the state shown in FIG. 2 before being tilted forward, the bent portion 5d disappears between the latch gear 2c and the tooth portion 3a, the latch gear 2c and the tooth portion 3a are engaged, and the seat is tilted forward. The seat back arm 2 is retained in its previous position.

Next, the case of changing the storage location will be explained. To change the memory position, first press the operating lever 4.
Rotate the seat back arm 2 to the non-meshing position.
The latch gear 2c is disengaged from the teeth 3a of the stopper 3, and the seatback arm 2 is rotated to an arbitrary angle (in FIG. 6, the seatback arm 2 is rotated clockwise from the memorized position). From this state, the abutting portion 4f of the operating lever 4 is further moved to the cam plate 5.
When the operating lever 4 is rotated to a position where it comes into contact with the tops 5o, 5o of the cam portion 5k, the convex portion 5i of the storage device 5 is pushed out from within the concave portion 2d of the seatback arm 2 against the elastic force of the spring washer 5c. Then, the storage device 5 rotates to a position where the end 5j of the bent portion 5d substantially coincides with the end 3f of the toothed portion 3a. Then, by returning the operating lever 4 to its original position, the inclination angle of the seat back arm 2 is memorized. In the above description, the case where the set position is changed behind the storage position has been described, but the same operation is performed when the set position is changed in front.

Further, as shown in FIG. 8, the same effect can be obtained by pressing a check ball 5i into the recess 2d of the seat back arm 2 by a spring 5m instead of the protrusion.

Alternatively, as shown in FIG. 9, the convex portion 5n may be formed of a material having elasticity, and the convex portion 5n may be fixed to the storage device 5.

In addition, in the embodiment of the present invention, a concave portion is provided on the seat back arm side, a convex portion is provided on the storage device side,
Although a concave-convex engaging portion is formed, a concave portion may be provided on the storage device side and a convex portion may be provided on the seat back arm side.

As explained above, the seat reclining device with a memory mechanism of this invention includes a seat cushion base fixed to the side of the seat cushion, and a spring fitting part fixed to the seat cushion base on the upper end side. a seat back arm rotatably supported on the shaft, fixed to the side of the seat back, and having a latch gear on the lower end side; a seat back arm rotatably supported on the seat cushion base; a stopper having a tooth portion that engages with the latch gear to hold the seat back arm at a desired reclining angle adjustment position; and a stopper that is rotatably supported on the seat cushion base and that the latch gear and the tooth portion of the stopper a holder plate that holds the seat back arm, the stopper, and the operating lever between the seat cushion base; and a holder plate that is fitted into the spring fitting portion of the shaft and that A reclining device comprising a spring means for tilting and biasing a back arm, the seat back arm being interposed between the seat back arm and the holder plate and rotatably supported on the shaft; a memory plate having an engagement prevention part that prevents the memory plate from engaging with the memory plate; a cam means which is fixed to the memory plate and rotates the memory plate to a memorized position by rotating the operating lever; The seatback arm is configured to include a spring means for pressing and biasing the seatback arm side, and a plurality of concave and convex engaging portions that elastically abut between the seatback arm and the memory plate are formed. It has the effect of

(a) Even if the seat back, which has been reclined to a suitable angular position, is tilted forward, it can be easily returned to its original suitable position by simply raising the seat back to the rear, and there is no need to readjust it.

(b) The reclining angle storage position of the seat back can be changed by using an operating lever that disengages the latch gear from the teeth of the stopper, so the seat back can be adjusted to a suitable reclining angle.

(c) A seat reclining device with a memory mechanism can be created by simply adding a memory plate, a cam means, and a spring means to a conventional seat reclining device, and forming an uneven engagement portion between the seat back arm and the memory plate. Therefore, the seat reclining device can be easily designed, and the increase in weight and cost of the device can be reduced.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of the seat reclining device of the present invention, Fig. 2 is a diagram of the seat reclining device in the locked state, Fig. 3 is a side sectional view, Fig. 4 is a plan view showing the seat back arm of the seat reclining device in the forward tilted state, Fig. 5 is a perspective view showing the state of the teeth of the stopper and the blocking member of the memory device, Figs. 6 and 7 are plan views showing the operation of changing the memory position, Fig. 8 is a side sectional view of the second embodiment of the present invention, and Fig. 9 is a side sectional view of the third embodiment of the present invention. 1... seat cushion base, 2... seat back arm, 2c... latch gear, 2d... recess, 5d... bent portion as meshing blocking portion, 5i...
... protruding portion, 5l... protruding portion check ball, 5n
...Convex part.

Claims (1)

[Claims for Utility Model Registration] A seat cushion base 1 fixed to the side surface of the seat cushion; a shaft 1b fixed to the seat cushion base 1 and having a spring fitting portion on the upper end side; and the shaft 1b. a seat back arm 2 which is rotatably supported on the seat cushion base 1 and is fixed to the side of the seat back and has a latch gear 2c on the lower end side; a stopper 3 having teeth 3a that engage with the seatback arm 2 to hold the seatback arm 2 at a desired reclining angle adjustment position;
and is rotatably supported on the seat cushion base 1, and is connected to the latch gear 2c and the stopper 3.
An operation lever 4 for disengaging the mesh with the toothed portion 3a of the
and the seat back arm 2 and the stopper 3.
and a holder plate 6 that holds the operating lever 4 between the seat cushion base 1 and a spring means that is fitted into a spring fitting portion of the shaft 1b and biases the seat back arm 2 to tilt. In the reclining device, the seat back arm 2 is interposed between the seat back arm 2 and the holder plate 6, and the shaft 1
a memory plate 5a that is rotatably supported on the latch gear 2c and has an engagement prevention portion 5a that prevents engagement between the latch gear 2c and the tooth portion 3a of the stopper 3;
a cam means fixed to the memory plate 5a, which rotates the memory plate 5a to a memorized position by rotating the operating lever 4; and a cam means which presses and urges the memory plate 5a toward the seat back arm 2 side. 1. A seat reclining device with a memory mechanism, comprising a spring means, and a plurality of concave and convex engaging portions that elastically abut between the seat back arm 2 and the memory plate 5a.