JPH0350525B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reclining device equipped with a mechanism for storing the inclination angle of a seat back.

A reclining device adjusts the inclination angle of the seatback by operating a release arm, but the front seats of two-door cars are equipped with a system that allows the seatback to be folded forward, especially to make it easier to get in and out of the rear seats. A reclining device is used. By the way, in this type of reclining device, when the seat back is tilted forward, the locking mechanism of the reclining device operates at the most forward tilting angle of the seatback and fixes the seatback at that tilting angle, so the occupant in the front seat cannot release the seat after seating. I had to readjust the inclination angle of the seat back by operating the arm.

In order to solve this inconvenience, a reclining device has recently been developed that can automatically set the seat back to the inclination angle that was set before the seat was folded forward by simply pulling the seat back backwards.

However, with this reclining device with a memory mechanism, it is troublesome to adjust the memory lever, and when another passenger who is temporarily using the seat back adjusts the inclination angle of the seat back, it is difficult to adjust the inclination angle of the seat back. The drawback is that the seat bag cannot be locked. In addition, there are some reclining devices that eliminate this drawback, but the latter conventional device has the disadvantage that the pole does not move smoothly and reliably when the seatback is folded forward, and the memory position cannot be changed continuously. There is a drawback that there is no

The present invention has been made in view of the above points, and its purpose is to make it possible to easily adjust the memory lever, to lock the seat back even in front of the memorized position, and to make it possible to lock the seat back even in front of the memorized position. To provide a reclining device in which the movement of a pole when tilting forward is smooth and reliable, and the storage position can be changed continuously.

In the reclining device of the present invention, which achieves the above object, a lower arm fixed to the seat cushion side and an upper arm fixed to the seat back side are rotatably connected by a hinge pin, and the upper arm has a tooth tip circle. A ratchet plate is fixed such that the center of the ratchet plate is located on the central axis of the hinge pin, and a pawl that engages and disengages from the outside with the teeth of the ratchet plate is rotatably pivoted to the lower arm, and A protruding guide pin is provided, and the guide pin is inserted into a cam hole of a release plate rotatably connected to the lower arm, and the release plate is rotated by the release arm so that the teeth of the ratchet plate and the pawl are rotated. The reclining device is rotatably supported by the hinge pin in a state in which the seat back is rotatably biased in the forward tilting direction, and the outer peripheral portion of the tip is provided with a reclining device that covers the teeth of the ratchet plate and a first memory plate provided with a flange whose side end abuts the side end of the pole; and a first memory plate provided with an arcuate elongated hole or pin centered on the hinge pin at a position remote from the center of rotation; rotatably supported by the hinge pin in a state where the first memory plate is rotationally biased in a direction opposite to the first memory plate with a rotational force weaker than that of the first memory plate;
The outer peripheral portion is provided with an arc-shaped flange centered on the hinge pin, and the intermediate portion is provided with an arc-shaped elongated hole centered on the hinge pin into which a pin provided on the first memory plate loosely fits. A second memory plate is provided with a pin that loosely fits into the arc-shaped elongated hole provided in the first memory plate; A protrusion to be pushed is provided, and when the protrusion is pushed and rotated by the front lower end of the upper arm, the pole is further rotated in the unlocking direction, and the side end and the first memory plate are rotated. A release plate in which the cam hole is formed in a shape to release the cam hole from contact with the side end of the flange, and the upper arm are provided to press the flange of the second memory plate to stop its rotation. The invention is characterized in that it is provided with a brake mechanism for controlling the brake mechanism, and a memory lever for releasing the braking of the brake mechanism.

Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIGS. 1 to 4, 1 is a lower arm fixed to the seat cushion side, 2 is an upper arm fixed to the seat back side, and the upper arm 2 is rotatable in the front-rear direction via a hinge pin 3 on the lower arm 1. It is pivoted as possible. Reference numeral 4 designates a fan-shaped ratchet plate, on the outer periphery of which is carved an arcuate toothed portion 4a that is co-centered with the hinge pin 3, and is riveted to the upper arm 2 by a pin 5. Reference numeral 6 denotes a pawl having teeth that engage with the teeth 4a of the ratchet plate 4 from the outside.
It is pivotally connected to the lower arm 1 with a pin 7 so that it can be engaged with and disengaged from the lower arm 1. 8 is the pole 6
It is a release arm for engaging and disengaging, and is rotatably supported by a hinge pin 9.
This linking structure between the release arm 8 and the pawl 6 is such that the pin 9 is inserted into the release plate 11 which is rotatably supported by a pin 9 and is always urged to rotate counterclockwise by a tension spring 10. An arcuate elongated hole 11a is formed around the hole, and the cut and raised portion 8a of the release arm 8 is loosely fitted into the elongated hole 11a, and a guide pin 12 protrudes from the pole 6.
is inserted into the cam hole 11b of the release plate 11, and as the release arm 8 rotates clockwise, the pawl 6 rotates in the unlocking direction. 13 is a cam fixed to the release plate 11, and the pawl 6 is connected to the teeth 4 of the ratchet plate 4.
The back surface of the pole 6 is pressed to maintain the locked state in which the pole 6 is engaged with the pole 6. Furthermore, in order to suppress the amount of movement of the pawl 6 within a certain range when the release arm 8 releases the lock, the lower arm 1 is provided with a stopper 1a which is a stepped portion that comes into contact with the cut and raised portion 8c of the release arm 8. ing. or,
A tension spring 14 is hooked between the extending portion 8b of the release arm 8 and the extending portion 11c of the release plate 11. The tension spring 14 biases the release arm 8 to rotate clockwise.

The base of the seat 15 is rotatably attached to the hinge pin 3, and a tension spring 16 stretched between it and the upper arm 2 always applies a rotational force in the counterclockwise direction (direction of folding the seat back forward). In the first memory plate, the side end 15b on the pole 6 side of the flange 15a formed on the outer periphery of the tip comes into contact with the side end of the pole 6, so that rotation in the counterclockwise direction is restricted. ing. The first memory plate 15 has an arc-shaped elongated hole 15c centered around the hinge pin 3. 17 is pivotally connected at its base by a hinge pin 3, and is always rotated clockwise by a tension spring 18 having a tensile force weaker than the force of the tension spring 16 stretched between it and the upper arm 2. This is a second memory plate to which power is applied, and a pin 19 is protruded from the middle part of the second memory plate 17 to fit loosely into a long hole 15c formed in the first memory plate 15. An arcuate flange 17a centered on the hinge pin 3 is formed at the portion. Reference numeral 20 denotes a memory lever attached to a memory lever pin 21 so that the operating end is located on the front side of the seat back. 22) and the torsion spring 23 (see FIG. 2), the rotational force in the clockwise direction in FIG. 1 is always applied. The memory lever pin 21 has an eccentric portion 21a provided with knurling, etc., into which a brake ring 24 made of rubber or the like is fitted (see FIG. 4). Of this brake ring 24, the eccentric portion 21a of the memory lever pin 21
The portion fitted near the long diameter portion of is biased by the torsion spring 23 so as to come into pressure contact with the inner surface of a flange 17a formed on the outer peripheral portion of the second memory plate 17. That is, the brake ring 24 is urged to rotate in the direction A in FIG. 2, and the rotation of the second memory plate 17 is restricted by this frictional force. still,
When the seatback is folded forward, release plate 1
The release plate 11 is rotated significantly clockwise by pressing the protrusion 11d formed at the tip of the pawl 6, and the teeth of the pawl 6 are released from the flange 15a, that is, the side end 15b of the flange 15a.
Release the contact between the side end of the pole 6 and the pole 6.
In order to make the teeth of the flange 15a go over the flange 15a,
A convex portion 2a is formed at the lower end front portion of the upper arm 2. Further, from a structural standpoint, it is preferable to attach the sub-plate to the frontmost side in FIG. 1 using pins 3, 7, and 9 to strengthen the structure and prevent each component from coming off.

Next, the operation of the embodiment configured as described above will be explained.

Adjustment of the inclination angle of the seat back, that is, the upper arm 2 in the longitudinal direction, is carried out by disengaging the pawl 6 and the teeth 4a of the ratchet plate 4, as in the prior art. That is, by rotating the release arm 8 clockwise, the pawl 6 is rotated counterclockwise due to the cooperation between the cam hole 11b of the release plate 11 and the guide pin 12, and the engagement with the tooth portion 4a is released. do by doing.

Next, the operation for storing (updating) the position of the seat back will be explained. First, a case will be described in which the optimum position of the seat back is located behind the stored position before the adjustment operation. In this case, the seat back is tilted backward by the reclining angle adjustment operation described above, and the first and second memory plates 15, 17
also rotates clockwise. After setting the seat back to the optimum position in this way, when the memory lever 20 is pushed down to memorize this adjusted position, the memory lever pin 21, which is integrally formed with the memory lever 20, moves in the direction B in FIG. Since the brake ring 24 separates from the flange 17a of the second memory plate 17, the second memory plate 17 becomes free to rotate. A tension spring 18 is attached to the second memory plate 17.
Torque is acting on the first memory plate 15 to rotate it clockwise.
Since the force of the tension spring 16, which is stronger than the tension spring 18, is acting, the second memory plate 17 also rotates counterclockwise together with the pin 19 engaged with the end of the elongated hole 15c of the first memory plate 15. It turns out. And the side end 1 of the flange 15a in the first memory plate 15
When 5b comes into contact with the side end of pole 6, these rotations stop. On the other hand, if the optimal position is ahead of the memorized position before the adjustment operation, the seat back will tilt forward by the reclining angle adjustment operation, but at the time of this adjustment, the brake is applied to the flange 17a of the second memory plate 17 The ring 24 is in pressure contact, and the movement of the second memory plate 17 is restricted. Therefore, during this adjustment, the side end of the pole 6
The side end 15b of the flange 15a of the first memory plate 15 is pushed, and the first memory plate 15
rotates clockwise relative to the second memory plate 17. At this time, the elongated hole 15c naturally also moves clockwise relative to the pin 19. After this adjustment, when the memory lever 20 is pushed down to memorize the adjusted position, the first memory plate 15 does not rotate because the side end 15b of the flange 15a is already in contact with the side end of the pole 6. However, the second memory plate 17 rotates clockwise until the pin 19 abuts against the end of the elongated hole 15c of the first memory plate 15, and stops at the abutting position. When you release your hand from the memory lever 20 in this state, the force of the torsion spring 23 causes the memory lever 20 and the memory lever pin 21 to rotate clockwise in FIGS. 1 and 2, so that the outer peripheral surface of the brake ring 24 presses the inner surface of the flange 17a of the second memory plate 17, fixing the second memory plate 17. Therefore, this position has been memorized.
Furthermore, when adjusting the reclining angle using the release arm 8, since the amount of counterclockwise movement of the pawl 6 is small (due to the presence of the stopper 1a), the teeth of the pawl 6 will not go over the flange 15a of the first memory plate 15. .

After storing the seat back position in this way, when the release arm 8 is operated to adjust the tilt of the seat back forward from the memorized position, the second memory plate 17 rotates counterclockwise together with the upper arm 2, and the first memory plate 17 rotates counterclockwise together with the upper arm 2. Since the side end 15b of the flange 15a is in contact with the side end of the pole 6, the plate 15 rotates clockwise relative to the upper arm 2. At this time, Atsupa arm 2
Since the relative position of pin 19 to is unchanged,
Storage locations are retained.

Also, when the seat back is tilted backward from the memorized position, the pin 19 of the second memory plate 17
By engaging with the end of the elongated hole 15c of the first memory plate 15, the first memory plate 15 maintains its relative position with the upper arm 2. Therefore, the pole 6 can be locked at any position on the ratchet plate 4 while maintaining the memorized position.

On the other hand, when the release arm 8 is pulled up and the seat back is tilted forward, the protrusion 2a provided on the upper arm 2 is moved to the protrusion 11 of the release plate 11.
d to further rotate the release plate 11 clockwise (this rotation is possible due to the presence of the elongated hole 11a), the pawl 6 is also largely displaced,
The teeth pass over the flange 15a of the first memory plate 15. Therefore, if the seatback is locked in front of the memorized position before the seatback is folded forward, the elongated hole 15c of the first memory plate 15 is free from the pin 19, so the first memory plate 15 is moved by the force of the spring 16. According to
Rotate counterclockwise to the memorized position of the pin 19. That is, the first memory plate 15 returns to the storage position.

When the seatback is pulled up from this state, the pawl 6 is inserted into the cam hole 1 provided in the release arm 8.
1b and the guide pin 12 (due to the force of the spring 10), the pawl 6 tries to engage with the first memory plate 15.
cannot engage while in contact with the outer surface of the flange 15a. Therefore, when the outer surface of the flange 15a of the first memory plate 15 and the pole 6 move relative to each other while slidingly contacting each other, and come to the memory position (side end portion 15b), the pole 6 moves toward the flange 15a.
a, and engages with the teeth 4a of the ratchet plate 4, and is locked in the memorized position.

Conventionally, the memory lever 20 was provided at the rear of the seat back, so the memory could be canceled if it came into contact with it when getting on and off the back seat, or because of a child's mischief. In this embodiment, the memory lever 20 is provided on the front side of the seat bag, so this problem does not occur.

Further, the brake mechanism of the above embodiment had a simple structure consisting of pressure contact between the brake ring 24 and the flange 17a of the second memory plate 17, but other structures may be used as long as it is a friction brake type. It may be. Furthermore, although the arcuate elongated hole 15c is formed in the first memory plate 15 and the pin 19 is provided in the second memory plate 17 in a protruding manner, as is clear from the operation of the present invention, the opposite may be used.

As explained above, according to the present invention, the following effects can be obtained.

() The optimal position of the seat back can be memorized by simply operating the memory lever.

() The seat back can be locked in any position even after the seat back position has been memorized, so even if someone other than the regular occupant uses the seat, the seat back can be locked in any position without having to release the memorized position. .

() The entire movement of the pawl is performed using the cam hole drilled in the release plate, and the latter part in particular is configured to move the pawl by pushing the release plate with the protrusion of the atsupa arm. The movement of the pole when folding forward becomes smooth and reliable.

() Since the structure is such that braking is achieved by pressing the second memory plate, the memory position can be changed continuously.

[Brief explanation of drawings]

Fig. 1 is a schematic front view showing a reclining device with a storage mechanism of the present invention, Fig. 2 is an enlarged view of a part of Fig. 1, Fig. 3 is a sectional view along AA of Fig. 2, and Fig. 4 is a memory lever. It is a perspective view of a pin and a brake ring. 1...Lower arm, 2...Upper arm, 3...Hinge pin, 4...Ratchet plate, 4a...Tooth portion, 5, 1
9...pin, 6...pole, 8...release arm, 1
0, 14, 16, 18... tension spring,
11... Release plate, 12... Guide pin, 1
3...Cam, 15...First memory plate, 17...
2nd memory plate, 20... memory lever,
21...Memory lever pin, 23...Torsion spring, 24...Brake ring.

Claims (1)

[Scope of Claims] 1. A lower arm fixed to the seat cushion side and an upper arm fixed to the seat back side are rotatably connected by a hinge pin, and the center of the tip circle of the upper arm is connected to the hinge pin. A ratchet plate is fixed so as to be positioned on the central axis of the lower arm, and a pawl that engages and disengages from the outside to the teeth of the ratchet plate is rotatably pivoted to the lower arm, and a guide pin is provided protruding from the pawl. The guide pin is inserted into a cam hole of a release plate rotatably connected to the lower arm, and the release plate is rotated by the release arm to engage and disengage the teeth of the ratchet plate and the pawl. In the reclining device, the seat bag is rotatably supported by the hinge pin in a state where the seat bag is rotatably biased in a forward tilting direction;
A flange is provided on the outer periphery of the tip, and the flange covers the teeth of the ratchet plate and has a side end that abuts the side end of the pole, and a flange having an arc shape centered on the hinge pin is provided at a position away from the center of rotation. a first memory plate provided with an elongated hole or a pin; and a first memory plate rotatably supported by the hinge pin in a state where the first memory plate is biased to rotate in the opposite direction to the first memory plate with a rotational force weaker than the first memory plate. The outer peripheral portion is provided with an arc-shaped flange centered on the hinge pin, and the intermediate portion is provided with an arc-shaped elongated hole centered on the hinge pin into which a pin provided on the first memory plate loosely fits. a second memory plate provided with a pin that loosely fits into the arc-shaped elongated hole provided in the first memory plate; When the pole is rotated by being pushed by the front lower end of the upper arm, the pole is further rotated in the unlocking direction, and the side end and the first memory are rotated. The release plate has the cam hole formed in such a shape as to release the cam hole from the side end of the flange of the plate, and the atsuppa arm is provided with a release plate that presses the flange of the second memory plate to prevent its rotation. A reclining device comprising: a brake mechanism for stopping; and a memory lever for releasing the brake of the brake mechanism. 2. The brake mechanism includes a memory lever pin that is rotatably supported by the upper arm and has an eccentric portion, and a brake ring that is attached to the eccentric portion of the memory lever pin and presses against a flange provided on the second memory plate. The reclining device according to claim 1, characterized in that the reclining device comprises: