JP3343593B2 - Vehicle seat lock structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock structure for a retractable seat of a vehicle, and more particularly to a release rod structure used for locking a seat.

[0002]

2. Description of the Related Art As shown in FIG. 1, a rear seat 1 of a vehicle comprises a seat back 2 and a seat cushion 3, and the seat back 2 is supported by a hinge bracket 4 so as to be freely tilted forward. When using the rear seat 1, the striker 5 fixed to the vehicle body is
Is fitted into the groove 20 formed on the side surface of the seat back from behind, and is fixed by a lock device provided in the seat back 2. As shown in FIG. 7, a conventional locking device includes a seat back a.
The release knob b is operated by a resin release knob b mounted on the upper part of the release rod c, and is screwed to a tip of a release rod c. The release rod c is loosely inserted into a guide hole e formed in a pad d made of an elastic member such as urethane. The surface of the seat back a is covered with a skin f, and a metal eyelet g is mounted on an opening of the guide hole e of the skin f.

[0003]

However, if the position of the striker on the vehicle body is not accurately set up and down,
In particular, when the striker is disposed above a predetermined position, the engagement position with the lock device is also above, and FIG.
As shown in the figure, the release knob b is in a state of jumping upward. When engaging at a predetermined position as shown in FIG. 7, the clearance between the release knob b and the eyelet g (l ₁ +
l ₂ ) is small and poses no problem, but when it jumps upward, the gap (L ₁ + L ₂ ) becomes large, and the release knob b vibrates greatly due to severe vibration during traveling, causing abnormal noise with the eyelet g. May occur. Also, if the release knob b is tightened with an excessive torque when screwing the release knob b to the release rod c, the tip of the release rod c bites into the release knob b, and the release knob b is damaged and the surface becomes white. There was something to do. Therefore, an object of the present invention is to prevent the occurrence of abnormal noise during traveling and prevent excessive screwing when assembling the release knob regardless of the position of the striker, thereby preventing the release knob from being damaged. It is to provide a lock structure.

[0004]

In order to solve the above-mentioned problems, a first aspect of the present invention is a lock cam that engages a striker provided on a vehicle body, a release rod connected to the lock cam, and a release rod. A seat hole provided in the seat back, and a release knob for operating engagement of the lock cam mounted on the tip of the release rod. Provide a bending part on the rod,
By operating the release knob, the curved portion comes into contact with the step,
The release knob is deviated in the guide hole.

According to a second aspect of the present invention, in the first aspect of the present invention, the release knob is screwed to a release rod, and the curved portion is formed from a mounting position of the release knob of the release rod. I do.

[0006]

In the vehicle seat lock structure according to the first aspect of the present invention, a stepped portion and a curved portion which come into contact with each other when the release knob is operated are provided, so that when the position of the striker is upward, the release knob is flipped upward. And the same state as when the release knob is operated. For this reason, the curved portion comes into contact with the step portion, and the release knob is deviated in the guide hole, so that the release knob is pressed against the eyelet, and vibration of the release knob during traveling is suppressed. In the vehicle seat lock structure according to the second aspect, since the bending portion is formed from the mounting position of the release knob of the release rod, the predetermined position is maintained even when the release knob is tightened by an excessive torque when the release knob is assembled. When the screw is fully screwed, the further screwing is prevented by the bending portion, so that the release knob can be prevented from being damaged due to excessive screwing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a rear seat 1 of a vehicle includes a seat back 2 and a seat cushion 3, and the seat back 2 is supported by a hinge bracket 4 so as to be freely tilted forward. A groove 20 that fits into the striker 5 fixed to the vehicle body is provided on a side surface of the seat back 2.
Are formed, and a lock device is provided inside the groove 20. As shown in FIGS. 2 to 4, the lock device operates a lock cam 6 that engages with the striker 5, a release rod 7 that is connected to the lock cam 6, and operates the rotation of the lock cam 6 that is attached to the tip of the release rod 7. And a release knob 8. The lock cam 6 has a lock claw 6a facing downward, is rotatably supported via a cam shaft 2c provided on the bracket 2b, and is locked by a spring 2d mounted on the cam shaft 2c.
a and the striker 5 is urged in a direction for maintaining the engagement. The lower end of a release rod 7 is connected to the lock cam 6, and when the release rod 7 is operated upward, the lock pawl 6
and the striker 5 is disengaged. The release rod 7 is formed by bending a metal bar in a planar manner, and has a threaded portion 7a for mounting the release knob 8 at the upper end. In addition, the screw portion 7a
A curved portion 7b is formed from the position of the release knob 8 attached to the lower portion to the lower portion, and the curved portion 7b is also formed at the same time as other bent portions. Release rod 7
Is loosely inserted into a guide hole 9a of the seat back 2 described later. The release knob 8 is composed of a knob 8a and a cylindrical portion 8b, and is formed so that the diameter decreases in an inverted conical shape from the lower surface of the knob 8a to the cylindrical portion 8b. A screw is formed at the inner end of the cylindrical portion 8b so as to correspond to the screw portion 7a of the release rod 7. This release knob 8
Is formed of a resin, and is screwed to the release rod 7 from the guide hole 9a in the upper part of the seat back 2. When the release knob 8 is mounted, if the screw is screwed to a predetermined position, further screwing is prevented by the bending portion 7b.

The seat back 2 includes a frame 2a, a seat panel 2e, and a pad 9 formed of urethane or the like.
And is covered with a skin 10. A groove 20 that opens to face the striker 5 is open from the side to the rear of the seat back 2. A bracket 2b that supports the lock cam 6 is disposed inside the groove 20, and the bracket 2b is mounted on the frame 2a.
The pad 9 is formed of an elastic material such as urethane and has a groove 20.
A guide hole 9a communicating from the inside to the upper portion of the seat back 2 is formed. A step 9b is formed in the upper part of the guide hole 9a corresponding to the curved portion 7b of the release rod 7, and when the release rod 7 is released upward, the curved portion 7b comes into contact with the step 9b. The release rod 7 is formed so as to be deviated and pressed against the opposite side of the guide hole 9a. Here, the deviation means that the release rod 7 is moved to one side of the guide hole 9a. A metal eyelet 10a is provided around the opening of the guide hole 9a, and
Is mounted in an annular shape. The striker 5 is formed in a U-shape, and is fixed to the panel 12 of the vehicle body by welding or the like.

Next, the operation of this embodiment will be described. When the seat back 2 is used, when the seat back 2 is raised at a predetermined angle, the striker 5 is fitted into the groove 20 from the rear. The striker 5 contacts the lock cam 6 in the groove 20, and when the seat back 2 is further raised, the lock cam 6 is rotated to push up the lock claw 6a. When the lock claw 6a gets over the striker 5, the lock cam 6 rotates in the opposite direction due to the biasing force of the spring 2d, and the lock claw 6
a engages the striker 5. Since the lock cam 6 is urged by the spring 2d to maintain this state, the fixing of the seat back 2 to the striker 5 is completed. To release the fixation of the seat back 2, when the release knob 8 is operated upward, the lock cam 6 is rotated via the release rod 7 against the urging force of the spring 2d. By the rotation of the lock cam 6, the engagement between the lock claw 6a and the striker 5 is released, and the seat back 2 can be freely tilted. When the striker 5 is disposed at a predetermined position, the striker 5 and the lock claw 6a are engaged at a predetermined height, and therefore, as shown in FIG. And the release knob 8 does not contact the eyelet 10a. However, FIG.
As shown in the figure, when the position of the striker 5 is upward, the release rod 7 is engaged in a pushed-up state, so that the curved portion 7b comes into contact with the step 9b and the release rod 7
Is deviated and a force acts on the opposite side of the guide hole 9a. For this reason, the release knob 8 at the tip of the release rod 7 is pressed against the eyelet 10a on the opposite side of the curved portion 7b.

In the vehicle seat lock structure of the above embodiment, the stepped portion 9b of the guide hole 9a and the curved portion 7b of the release rod 7 are provided so as to come into contact when the release knob 8 is operated upward. When the position of the striker 5 is above, when the seat back 2 is fixed, the release knob 8 is flipped up and the same state as when the release knob 8 is operated upward. For this reason, the curved portion 7b comes into contact with the step 9b, and the release knob 8 is deviated in the guide hole 9a.
Re Runode, Rerizunobu 8 is pressed against the eyelets 10a, together with the vibration is suppressed during running Rerizunobu 8, tapping sound occurrence of abnormal noise such as the Rerizunobu 8 and the eyelet 10a can be prevented. When the striker 5 is at the predetermined position, the curved portion 7b and the step portion 9b do not come into contact with each other, so that unnecessary pressing of the release knob 8 against the eyelet 10a can be prevented. When the release knob 8 is operated upward to release the fixation of the seat back 2, the curved portion 7b and the step portion 9b come into contact with each other, but the contact between the curved portion 7b and the step portion 9b becomes a point contact. resistance is not changed compared to the conventional also operating force not so large.

Further, since the bending portion 7b is formed from the mounting position of the release knob 8 of the release rod 7, even if the release knob 8 is tightened by an excessive torque when assembling the release knob 8, it is screwed to a predetermined position. And further screwing are prevented by the curved portion 7b, so that the positioning becomes easy and the release knob 8 can be prevented from being damaged due to excessive screwing. Since the curved portion 7b of the release rod 7 is bent in the same plane as the other bent portions, simultaneous processing is possible, which is advantageous in cost.

Although the illustrated embodiment has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made to the shape of each component.

[0013]

As is apparent from the above description, in the vehicle seat lock structure of the present invention, when the seat back is fixed to the striker, regardless of the position of the striker, abnormal noise generated from the release knob during traveling. Can be prevented, and positioning can be facilitated when assembling the release knob. Therefore, excessive screwing is prevented, and damage to the release knob can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rear seat showing a seat lock structure of the present invention.

FIG. 2 is a partially cutaway explanatory view showing a seat lock structure of the present invention.

FIG. 3 is a sectional view taken along line AA shown in FIG. 2;

FIG. 4 is an exploded view showing the seat lock structure of the present invention.

FIG. 5 is an enlarged view of a main part of FIG. 2 showing an operation state of the present invention.

FIG. 6 is an enlarged view of a main part of FIG. 2 showing another operation state of the present invention.

FIG. 7 is an enlarged view of a main part showing an operation state of a conventional example.

FIG. 8 is an enlarged view of a main part showing another operation state of the conventional example.

[Explanation of symbols]

 2 seat back 5 striker 6 lock cam 7 release rod 7a curved section 8 release knob 9a guide hole 9b stepped section

Claims (2)

(57) [Claims] A seatback includes a lock cam that engages a striker provided on a vehicle body, a release rod connected to the lock cam, and a guide hole through which the release rod is loosely inserted. In a vehicle seat lock device in which a release knob to be operated is mounted on a tip of the release rod, a step is provided in the guide hole, and a curved portion is provided in the release rod, and the curved portion is brought into contact with the step by operating the release knob. A seat lock structure for a vehicle, wherein the release knob is deviated in contact with the guide hole in the guide hole. 2. The vehicle seat lock structure according to claim 1, wherein the release knob is screwed to a release rod, and the curved portion is formed from a mounting position of the release knob of the release rod.