JP2533266Y2 - Seat lock mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat locking mechanism for a vehicle.

[0002]

2. Description of the Related Art Conventionally, in the case of a rear seat 1 shown in FIG. 7 in a seat lock mechanism of this kind, for example, in a one-box vehicle or the like, the rear seat 1 has a seat cushion 2 and a seat back 3 pivotally connected by hinge pins 4. A relief recess 3b is provided on the rear side of the upper portion of the side surface 3a, which is the side body side of the seat back 3, for the striker 5 attached to the side body side.
A hook member 6 is pivotally connected to the side surface 3a corresponding to the relief concave portion 3b by a pin 7, and a link member 8 is connected to the hook member 6 and a knob 9 attached to an end of the link member 8 is provided. The hook member 6 is disengaged from the striker 5 by pushing and pulling, and the seat back 3 is engaged and held at a predetermined angle, and the seat back 3 is tilted forward.

[0003]

However, in the above structure, the hook member 6 and the striker 5 interfere with each other, so that the seat back 3 can only be moved forward.
There is a problem that the rear seat 1 cannot be fully flattened by moving the seat back 3 backward.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and provides a seat lock mechanism which can tilt a seat back in the front-rear direction without interference between a hook member and a striker. The purpose is to do so.

[0005]

SUMMARY OF THE INVENTION In order to solve the above technical problem, the present invention provides a striker having a striker pin attached to a side body and a side body of a seat back pivotally attached to a seat cushion via a hinge plate. A lock device attached to a side of the striker pin, the lock device comprising a lock device detachable from the striker pin, the lock device being a lower portion on a center line between a lock base provided at a predetermined interval and the lock base. At a predetermined position, a hook having a V-groove at an upper portion and an engagement concave portion which is removably engaged with the striker pin at a lower portion along the center line via a shaft pin is rotatably provided. On the lower edge side of the base, a directional convex portion having an arc portion centered on the shaft pin and horizontal portions on both sides of the arc portion is formed. A hook is provided with a locking pin protruding between the shaft pin and the engaging recess in the vicinity of the directional projection, and the hook is engaged with the V-groove at a symmetrical position with respect to the center line on the upper side of the lock base. A latch is provided for operative engagement with a pair of links pivotally connected to the actuating link member at corresponding predetermined positions of the latch via locking pins. The seat lock mechanism has a structure in which a substantially V-shaped spring member is elastically attached to the stop pin.

[0006]

With the above construction, the hook can be set free and the seat back can be moved forward and backward by releasing the engagement between the latch and the V-groove of the hook. By tilting forward and backward, the engaging concave portion of the hook can be directionally held on the side opposite to the tilting side via the directional convex portion, and can be automatically locked when the seat back is raised.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings. In the drawing, reference numeral 11 denotes a seat frame of a seat back 3, which is formed by, for example, bending a pipe material into a substantially rectangular shape. The left and right frames 11 of the seat frame 11
A hinge plate 12 having a hinge pin 13 pivotally connected to the seat cushion 2 is attached to a lower portion of the seat cushion 2 and a lock device 23 is provided at an upper end portion of a frame 11b serving as a side body side of the seat frame 11. Are attached.

The mounting member 14 has a mounting recess 15 having a flat surface portion 16 for mounting the lock device 23 formed in a concave shape inward of the seat frame 11. A hole 17 through which the member 35 is inserted is provided. Reference numeral 18 denotes a frame plate attached to the seat frame 11 and made of, for example, a synthetic resin, a hard board, or the like. A lock device 23 is attached to the attachment member 14 of the seat frame 11 formed in this way, and the seat back 2
The striker 19 is attached to the side body side which holds and holds the at a predetermined angle.

The striker 19 has a mounting portion 20 and a striker pin 21 projecting at a predetermined length at the center of the mounting portion 20. A head 22 is formed at the tip of the striker pin 21. .

The lock device 23 includes a pair of lock bases 24A and 24B, and the lock bases 24A and 24B.
A latch 27A paired with a hook 26 interposed between B
27B, a pair of links 28a and 28b linked to the latches 26A and 26B, and a spring member 29.

The lock bases 24A and 24B are formed in the same shape, and are formed in a substantially trapezoidal shape. The latch 27A is located at a symmetric position of a predetermined size on the upper edge 24a side of the center line C of the lock base 24. , 27B are provided with through holes, and elongated holes 24c for operating the latches 27A, 27B are opened in a symmetrical position between the mounting holes 24b at a predetermined angle in the downward direction in the figure. . Further, mounting holes 24e of the device 23 are respectively provided at symmetric positions of a predetermined size on the lower edge 24d side, and a hook 26 is mounted at a position slightly below the position of the mounting hole 24e on the center line C. Hole 24f
Is pierced. In the center of the lower edge 24d, an arc portion 25 having a predetermined radius centered on the hook mounting hole 24f.
a on both sides of the arc portion 25a.
The directional projection 25 of the hook 26 having 5c is protruded. Lock bases 24A, 24B formed in this way
A hook 26 and latches 27A and 27B are mounted between them.

The hook 26 is formed in a substantially heart-shaped plate having a predetermined thickness and has a center line C '.
Are aligned with the center line C of the lock bases 24A and 24B, and the striker pin 2
1 is provided with an engagement recess 26a for engaging and disengaging from
The upper part on the upper side is substantially V which is engaged with and disengaged from the latches 27A and 27B.
A V-shaped V-shaped groove 26b is recessed. In addition, a shaft hole 26c that is rotatably fitted to the shaft pin 30 is provided at a predetermined position on the center line C '. Also, this shaft hole 26c
A locking pin 31 having a predetermined length for locking the spring member 29 by a caulking means or the like is protrudedly mounted at a predetermined position on the center line C ′ between the engaging pin 26 and the engaging concave portion 26a.

The lock base 24 thus formed
The cylindrical collars 32 are fitted to the mounting holes 24e at predetermined intervals, and the hooks 26 are rotatably fitted to the shaft holes 26c between the hook mounting holes 24f. The locking pin 31 attached to the hook 26 in this state is attached, for example, by a caulking means via a shaft pin 30 having a large diameter portion 30a to be fitted and a small diameter portion 30b fitted to the attachment hole 24f at both ends. One lock base 2
When the hook 25 swings right and left around the shaft pin 30, the horizontal portions 25 b and 25 c on the left and right sides of the arc portion 25 a are located near the arc portion 25 a of the directional convex portion 25 formed in 4 A.
And the engaging concave portion 26a of the hook 26 is
Are provided at predetermined angles α and α ′.

The latches 27A and 27B are mounted between the mounting holes 24b of the lock bases 24A and 24B, and are formed in substantially the same shape. The base 27a is mounted by a caulking means via a shaft pin 33. An engaging claw 27b is formed on the tip end side of the hook so as to be removably engaged with a V-groove 26b formed on the hook 26, and a link is provided at a predetermined position of the latches 27A and 27B. Attachment portions 27c for attaching 28a, 28b are formed, and one ends of the links 28a, 28b are pivotally connected via locking pins 34, and the elongated holes of the lock bases 24A, 24B via the locking pins 34. It is slidably mounted along 24c. This locking pin 34 is hook 2
6 has a length substantially corresponding to that of the locking pin 31 provided for the spring member 29 and also serves to lock the spring member 29.
A spring 29 is hung between them.

The spring member 29 is formed in a substantially V-shape. A coil spring portion 29a having a predetermined spring pressure is formed at symmetrical positions on the left and right sides.
A hook portion 29b is formed at the upper end of a. The spring member 29 formed as described above is hooked on the locking pins 31 and 34, whereby the latches 27A and 27B are connected to the locking pins 3.
4, the hook 26 is normally urged in the directions indicated by solid arrows (clockwise and counterclockwise).
In the V-groove 26b.

The mounting portions 27 of the latches 27A and 27B
The other ends of the links 28a and 28b attached to the mounting member 14 are pivotally connected by pins 36 to the end of an operating link member 35 inserted into the hole 17 of the attachment member 14. The other end of the operating link member 35 provided in this manner is connected to, for example, the seat back 3.
The knob 37 is mounted at a predetermined position at the upper end of the bracket.

In the lock device 23 constructed as described above, the hook 26 is engaged with the striker pin 21 of the striker 19 as shown in FIG. The striker pin 21, the locking pin 31, and the shaft pin 30 are positioned on the center line C by being engaged with 26b, and the seat back 3 is locked and held at a predetermined inclination angle without rattling.

To move the seat back 3 forward or backward from the locked state, grasp the knob 37 and pull it upward, and the links 28a,
Mounting portion 27c with latches 27A and 27B via 28b
The locking pin 34 moves upward (in the direction of the arrow a) along the elongated hole 24c against the spring member 29, whereby the latch 2
The engagement claws 27b are disengaged from the V-grooves 26c, and the hooks 26 are in a free state. This hook 2
For example, when the seat back 3 is tilted forward around the hinge pin 13 in a state where the
5 is rotated by a predetermined angle around the shaft pin 30 in a state of being engaged with the strander pin 21 as shown in FIG. 5, and the locking pin 31 is integrally formed with the arc pin 25a of the directional projection 25.
Is moved along the horizontal portion 25c, and when it comes into contact with the horizontal portion 25c, the rotation of the hook 26 is stopped and the engagement concave portion 26a
Is directed toward the rear side at a predetermined angle α ′, and in this state, when the seat back 3 is further tilted, the hook 26 is detached from the strike pin 21 and the seat back 3 is tilted forward.

In this state, the hook 26 is kept rearwardly directed by the biasing force of the spring member 29. Therefore, when the seat back 3 stands, the hook 2
6 is engaged with the striker pin 21, and the hook 26 is rotated counterclockwise about the shaft pin 30 so that the center line C ′ is aligned with the center line C of the lock base 24. At this position, the latches 27A and 27B are engaged with the V-groove 26b by the urging force of the spring member 29, and the seat back 3 is locked.

When the seat back 3 is to be moved backward, the hook 26 is in a free state in the same manner as described above, and when the seat back 3 is moved backward, the hook 26 is engaged with the strander pin 21 as shown in FIG. Is rotated by a predetermined angle around the shaft pin 30, and the locking pin 31 is integrally moved with the horizontal pin 25 b along the arc portion 25 a of the directional projection 25, and hooks when it comes into contact with the horizontal portion 25 b. The rotation of the hook 26 is stopped and the engaging concave portion 26a is directed to the front side at a predetermined angle α. In this state, when the seat back 3 is further tilted, the hook 26 is disengaged from the strike pin 21 and the seat back 3 Can be moved backward to bring the rear seat 1 into a fully flat state. The seat back 3 can be locked by standing up in the same manner as described above.

Since the present embodiment is constructed as described above, the latches 27A and 27B and the V-groove 26 of the hook 26 are used.
When the hook 26 is disengaged from the hook 26, the hook 26 is set in a free state, and the seat back 3 can be tilted forward or backward, and can be tilted to either side. 26a is the directional projection 25
Can be held in a direction opposite to the tilting side, and can be automatically locked when the seat back 3 stands up. Further, the lock device 23 has an extremely simple configuration, has the economical efficiency of being manufactured at a lower cost than the reclining mechanism, and also helps to reduce the weight.

[0022]

According to the present invention, a striker having a striker pin attached to a side body and a striker pin which is attached to a side body of a seat back pivotally attached to a seat cushion via a hinge plate and can be disengaged from the striker pin. A lock device comprising: a lock base opposed to the lock device at a predetermined interval; and a shaft pin at a predetermined position on the lower side of the center line between the lock bases. A hook having a V-groove on the upper side and an engagement concave portion for removably engaging the striker pin is provided at a lower portion along a center line so as to be rotatable. A directional convex portion having an arc portion and a horizontal portion on both sides of the arc portion is formed, and the hook is provided between the shaft pin and the engagement concave portion. A latch pin is protruded in proximity to the directional projection, and a latch is provided at a symmetrical position with respect to the center line on the upper side of the lock base so as to engage with the V-groove in a detachable manner. At a predetermined position, a pair of links pivotally attached to the operating link member is pivotally connected via a locking pin, and a substantially V-shaped spring member is elastically attached to the locking pin and the locking pin of the hook. By disengaging the latch from the V-groove of the hook, the hook can be set in a free state, the seat back can be moved forward, and the seat back can be tilted to any side. By tilting the seat back, the hook engaging recess can be directionally held on the side opposite to the tilting side via the directional projection, and can be automatically locked when the seat back is raised. In addition, the lock device has an extremely simple configuration, and has economical efficiency that can be manufactured at a lower cost than a reclining mechanism.
It also helps to reduce weight.

[Brief description of the drawings]

FIG. 1 is a perspective view of a seat frame of a seat back.

FIG. 2 is an exploded perspective view of the lock device.

FIG. 3 is a front view of the lock device.

FIG. 4 is a side view of the lock device.

FIG. 5 is an explanatory diagram when the seat back is moved forward.

FIG. 6 is an explanatory diagram when the seat back is moved backward.

FIG. 7 is a perspective view of a conventional rear seat.

[Explanation of symbols]

 Reference Signs List 11 seat frame 12 hinge plate 19 striker 21 striker pin 23 locking device 24A, 24B lock base 25 directional convex portion 25a arc portion 25b, 25c horizontal portion 26 hook 26a engaging concave portion 26b V-groove 27A, 27B latch 28a, 28b link 29 spring Member 30 Shaft pin 31, 34 Locking pin 35 Link member for operation C Center line of lock base

Claims (1)

(57) [Scope of request for utility model registration] 1. A striker having a striker pin attached to a side body side, and a locking device attached to a side body side of a seat back pivotally attached to a seat cushion via a hinge plate and detachable from the striker pin. A seat lock mechanism comprising: a lock base provided at a predetermined interval between the lock bases; and a predetermined position on the lower side of the center line between the lock bases along the center line via a shaft pin. The lower part has an engagement recess which is detachably engaged with the striker pin, and the upper part has a V.
A hook having a groove is rotatably provided, and a directional convex portion having an arc portion centered on the shaft pin and horizontal portions on both sides of the arc portion is formed on the lower edge side of the lock base, A locking pin protrudes from the hook between the shaft pin and the engaging recess in the vicinity of the directional projection, and the hook engages with the V-groove at a symmetric position with respect to the center line on the upper side of the lock base. A releasably engaging latch is provided, and at a corresponding predetermined position of the latch, a pair of links pivotally connected to the operating link member is pivotally connected via a locking pin, and the locking pin and the hook are connected to each other. A seat lock mechanism in which a substantially V-shaped spring member is elastically attached to the locking pin.