JPS6238828Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an adjuster mechanism for rear seat back reclining, and it is a simple mechanism that eliminates the need for position adjustment of the engagement structure between the seat back frame and the rotary plate when assembling the rear seat back. It is an object of the present invention to provide an adjuster mechanism for reclining a rear seat back, which can improve the efficiency of assembly work on a line, and which does not cause twisting of the seat back even if the reclining operation is performed from either the left or right end of the seat back. This is the purpose.

Currently, there is an adjuster mechanism for rear seatback reclining that has a structure as shown in Figure 3. In Figure 3, position A indicates the rearmost position with the rear seatback reclined, and position B indicates the position with the rear seatback raised most forward. It shows.

To explain the action of the adjuster mechanism having the illustrated structure, when the rear seat back 1 is in position A, when the rotating plate 2 is rotated in the direction of arrow A around the fulcrum O ₁ , the seat back frame 3 is rotated around the fulcrum O _2.
The guide 4 is formed integrally with the rotary plate 2 and rotates in the forward direction of the vehicle. At this time, the seat back frame 3 engaged with the guide 4 is located at the lower end of the guide 4 at the A position, but moves to the upper end of the guide 4 at the B position. Conversely, when rotating the rotary plate 2 in the direction of the arrow B, the rear seat back 1 is moved to the most reclined state A.
returned to position.

The adjuster mechanism having the above-mentioned structure and operation is designed to position the seatback frame 3 at the lowest end of the guide 4 when the rear seatback is in the A position before assembling the rear seatback to the vehicle, and to position the seatback frame 3 at the lowest end of the guide 4 when the rear seatback is in the B position. must be set in advance so that it is located at the top end of the guide 4, and then the rear seat bag must be installed. If the rear seat back is assembled while the seat back frame 3 is located in the middle of the guide 4, a sufficient sliding amount will not be obtained and the desired reclining function will not be achieved. In this way, the work of adjusting the positions of the seat back frame 3 and the guide 4 increases the number of man-hours required for assembling the line.

Furthermore, normally the rotary plate 2 is placed near both ends of the rear seat back, so if an occupant sits on either the left or right side of the seat and attempts to recline the seat back 1 only from one end, the rear seat The back 1 is twisted as shown in Fig. 4, and this twist is maintained as it is on the left and right rotating plates 2.
This results in a deviation in the rotation angle. Therefore, when the rear seatback is brought to the most reclined position A, even if the seatback frame 3 on the side where the passenger is sitting reaches the lowest end of the guide 4, the seatback frame 3 on the opposite side will not be able to rotate. Due to the deviation, the lowermost end of the guide 4 cannot be reached, and the rotary plate 2 cannot be sufficiently locked at the A position. In order to solve this problem, the lower end of the guide is designed to allow for the slide to take into account the torsion, but it is nearly impossible to make adjustments to account for this margin on the assembly line.

The present invention provides links at at least two locations on both sides of the upper end of the rear seat back frame, the lower end of which is rotatably supported on the body, in a rear seat back that is always biased to return toward the front of the vehicle. One end is pivoted,
The other end of the link is pivotally connected to the rear end of the vehicle of at least two rotary plates arranged at corresponding positions, and the rotary plate is connected to a rotating shaft rotatably supported on the body side. and the rotary plate is integrally connected by a rod at the front end of the vehicle opposite to the pivot position of the link;
A lock gear having a plurality of lock teeth is fixed to the rotation shaft within the rotation range of the shaft, and the body is configured such that a lock pin that engages with the lock teeth can selectively take a lock position and an unlock position. By configuring it to be placed on the side, it is no longer necessary to adjust the position of engagement between the seatback frame and the rotating plate when assembling the rear seatback, which was previously required, reducing the number of man-hours and improving line efficiency. To provide an adjuster mechanism for reclining a rear seat which improves assembly work efficiency and does not cause twisting even when the reclining operation is performed from either the right or left end.

EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention is demonstrated based on the Example shown in drawing.

As shown in FIGS. 1 and 2, the rear seat back frame 10 is rotatably supported on the body by two fulcrums O ₃ at the lower end. The tips of the links 11 are pivotally attached to the respective links.

The rear end of the link 11 is pivotally connected to the rear end of the vehicle of two rotary plates 12 arranged at positions corresponding to the links 11, and the rotary plates 12 and the seat back frame 10 are When either one of them rotates, the other rotates accordingly.

The rotating plate 12 has a hinge 13 fixed to the body side.
Both ends thereof are fixed to a rotary shaft 14 which is rotatably supported.

Further, between the left and right rotary plates 12, 12, a rod 15 is installed on the side substantially opposite to the pivot position of the link 11, that is, at the front end of the vehicle, and is integrally connected to the left and right rotary plates 12, so that the occupant can Seat back frame 1 can be adjusted by sitting on either side and reclining from either the left or right end.
Even if a force acts that causes 0 to become screwed,
The structure is such that no rotational deviation occurs between the rotating plates 12, 12, and therefore no twisting occurs in the seat back frame 10. Incidentally, in order to completely eliminate rotational deviation of the rotary plate 12 due to twisting of the seat back frame 10, the number of rotary plates 12 and links 11 may be increased.

The rear seat back S has a spring 16 fixed at both ends to the hinge 13 and connected to a back plate or a supporting member installed between the seat back frames 10, so that the reaction force of the spring 16 always moves the front of the vehicle. It is urged to return to the side.

A lock gear 17 having a plurality of lock teeth 21 is fixed to the rotating shaft 14 over a range in which the shaft 14 is rotated by a reclining operation, and a lock gear 17 having a plurality of lock teeth 21 is selectively engaged with any one of the lock teeth 21. A lock pin 18 to be engaged is disposed on the body side by a support rod 22 so as to be swingable about a fulcrum 20, and a body side member 23
A spring 24 tensioned between the two is biased to maintain the locked position at all times.

The end of the cable 19 is connected to the end of the support rod 22, and when the cable 19 is indexed by a seated person, the lock pin 18 is guided to the unlocked position. The guiding mechanism is not limited to the illustrated example.

That is, by pulling the cable 19, one end of which is fixed, the lock pin 18 is rotated upward about the fulcrum 20 of the lock pin, whereby the engagement with the lock gear 17 is released and the rear seat back S becomes free. The occupant adjusts the seat back angle while pushing the free seat back S with his back, and at the desired angle, releases the cable 19 and moves the lock pin 18 to the lock gear 17.
The seat back S is locked by engaging it with the seat back S.

To explain the rotational operation of the seatback frame 10 and rotary plate 12 in the seatback reclining adjuster mechanism of the present invention having the above configuration, as shown in FIG. When the locking mechanism is released while the seatback frame 10 is being rotated, the seatback frame 10 is rotated around the fulcrum _O3 , since the seatback S is always urged to return toward the front of the vehicle by the reaction force of the spring 16. Rotate forward.

As the seat back frame 10 rotates, the rotary plate 12 rotates together with the rotary shaft 14 via the link 11 in the direction of arrow C about the fulcrum O4, which is the axis of the rotary shaft ₁₄ .

Thereafter, by operating the locking mechanism when the seat back S is in a desired position, the seat back frame 10 and the rotary plate 12 are locked and the seat back S is fixed.

Furthermore, when the seatback S is in its most upright position, the lock mechanism is released and the occupant pushes the seatback S with his/her back while tilting it backwards, the seatback frame 10 rotates toward the rear of the vehicle, and the rotary plate 12 also moves in the direction of the arrow. Rotate. Thereafter, when the seat back S reaches a desired angle, the seat back S is fixed by operating the locking mechanism. When the occupant applies the pressing force only from either the left or right end of the seat back and performs a reclining operation that causes the seat back S to twist, the rotating plates 12 are rotated between the rotating shaft 14 and the rod 15. and the rod 15 is disposed at the front end of the vehicle opposite to the pivot position of the link 11 with respect to the rotary plate 12, and the rotary plate 12 and the rear seat back frame 10 are The pivot point of the link 11 is connected to the frame 10.
Combined with the fact that the upper end of the rear seat back frame 10 is located close to both sides, the pressing force acts almost uniformly on the rear seat back frame 10, and twisting of the seat back S is almost eliminated.

As described above, the present invention provides a rear seat back frame whose lower end is rotatably supported on the body in a rear seat back that is always urged to return toward the front of the vehicle and can be fixed at any angle. One end of the link is pivotally attached to at least two locations on both sides of the upper end, and the other end of the link is pivotally attached to an end portion of a rotary plate on the vehicle rear side, and the rotary plate is rotatably supported on the body side. The seat back frame is fixed to the rotating shaft, and the rotating plate is integrally connected with a rod, and the seat back frame and the rotating plate are simply connected via a link. The folding operation can be performed smoothly with a small amount of force,
Furthermore, there is no need to adjust the position of engagement between the seatback frame and the rotary plate, reducing the number of man-hours and greatly improving the assembly efficiency of the line. . Furthermore, even if a reclining operation that causes twisting of the seat back is performed, the seat back does not twist.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the entire adjuster mechanism for the rear seat back recline of the present invention, Fig. 2 is a diagram showing the connection relationship between the seat back frame and the rotating plate in the adjuster mechanism for the rear seat back recline of the present invention, and its operation. Fig. 3 is a diagram showing the connection relationship between the seat back frame and the rotary plate in a conventional rear seat back reclining adjuster mechanism, and Fig. 4 is a simplified diagram of the conventional rear seat back reclining adjuster mechanism, showing a state in which the seat back is twisted. It shows. 10: Seat back frame, 11: Link,
12: Rotating plate, 14: Rotating shaft, 15: Rod, 1
6: Spring, 17: Lock gear, 18: Lock pin, 19: Cable, S: Seat back.

Claims (1)

[Scope of utility model registration request] In a rear seat back that is always biased to return toward the front of the vehicle,
One end of the link is pivotally attached to at least two locations on both sides of the upper end of the rear seat back frame, whose lower end is rotatably supported to the body, and the other end of the link is attached to at least two panels disposed at corresponding positions. The rotary plate is pivotally attached to the rear end of the vehicle, the rotary plate is fixed to a rotary shaft rotatably supported on the body side, and the rotary plate is attached to the opposite side of the pivot position of the link. The rotating shaft is integrally connected by a rod at the front end of the vehicle, and a lock gear having a plurality of lock teeth within the rotation range of the shaft is fixed to the rotating shaft, and the lock gear is engaged with the lock teeth. An adjuster mechanism for rear seat back reclining, characterized in that a locking pin is disposed on the body side so as to selectively take a locking position and an unlocking position.