JPH0733942Y2 - Vehicle seat slide device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat slide device.

[0002]

2. Description of the Related Art Generally, a seat of an automobile is designed so that an optimum seat position can be secured by a seat slide device according to the height of an occupant.

An outline of the seat slide device is that the lower rail fixed to the vehicle body side is provided with engaging holes at equal intervals along the longitudinal direction, and the upper rail fixed to the seat side is detachable from the engaging hole. There is an engagement latch that engages with each other.

The lower rail and the upper rail are mounted so as to be slidable forward and backward, and the engagement latch is mounted on an operation lever shaft pivotally mounted on the upper rail side, and is constantly engaged hole side by an urging spring interposed on the operation lever shaft. The structure is biased toward.

[0005]

As described above, the locked state of the seat is ensured by the engagement between the engagement hole and the engagement latch, but in recent years, the demand for safety of automobiles has been increasing. In the seat slide device, improvement in lock strength is required.

Therefore, as a countermeasure against this, the lower rail having the engaging hole or the plate thickness of the engaging latch is dealt with, but it is not preferable because it goes against weight reduction.

Therefore, an object of the present invention is to provide a vehicle seat slide device which is capable of improving the lock strength without increasing the size of the device and is also very lightweight.

[0008]

In order to achieve the above object, the present invention is directed to a lower rail fixed to a vehicle body side, an upper rail fixed to a seat side and attached to the lower rail so as to be movable relative to the lower rail. A large number of first and second engaging holes provided on both side walls of either the lower rail or the upper rail and facing each other, and engageable with the first engaging holes provided on the other side so as to be detachable from the outside. With a matching main latch,
The main latch, which is arranged in the rail having the first and second engaging holes, is pressed at the time of engaging with the first engaging hole and can be detachably engaged with the second engaging hole on the opposite side from the inside. It is composed of a sub-latch which is engaged with each other and is supported on the rail side having the main clutch, and a biasing means for always positioning the sub-latch to the standby position retracted from the second engagement hole.

[0009]

According to such a seat slide device, in the unlocked state in which the main latch and the sub-latch are retracted from the first and second engaging holes, the upper rail is slid by a predetermined amount with respect to the lower rail, and then the main latch is again moved. Is engaged with the first engaging hole, the sub-latch at the standby position is pressed to obtain a locked state in which the sub-latch engages with the second engaging hole. Even when the plate thickness is not increased at the time of locking, the main latch and the sub-latch engage with the first and second engaging holes, respectively, so that a strong locked state can be obtained. Further, since the sub-latch is incorporated inside the rail, the sub-latch does not increase the size of the device.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings of FIGS.

In the figure, 1 is a lower rail attached to the vehicle body side, and 3 is an upper rail attached to the seat side.

The lower rail 1 has a long shape in the front-rear direction, and the rail body has side walls 9 and 9 rising vertically from both side edges of a horizontal portion 7 to which mounting brackets 5 and 5 are fixed to both front and rear ends, and further toward the inner side. It has a box-shaped cross section in which the outer guide portions 11, 11 horizontally project, and a roller-shaped rotating body 13 provided for the guide and having its axis orthogonal to the longitudinal direction is arranged inside. Also, the outer guide portions 11, 1
The tip of 1 is bent downwardly in a short direction, and an opening 17 continuous between the bent portions 15 is provided in the longitudinal direction. The left and right side walls 9 of the lower rail 1 also have a first engagement hole 19 and a second engagement hole 20 that are opposed to each other in the longitudinal direction.
Are formed with a predetermined interval. The first and second engagement holes 19 and 20 have a vertically long rectangular window hole shape, and are formed by press molding.

The upper rail 3 is elongated in the front-rear direction, and the rail main body is protruded upward from the opening 17 and is fixed to the seat side by joining the rail members to each other. The outer guide portion 1 on the lower rail 1 side projects horizontally from the lower end of 21 to the left and right.
Inner guide portions 23, 23 that respectively face 1 and 11
It has a T-shape with a downward cross section consisting of and. The inner guide portions 23, 23 are placed on the roller-shaped rotating body 13, and both ends of the inner guide portions 23, 23 are bent upwardly and shortly. The bent portions 25, 25 are formed by the lower rail 1
The curved portions 15 and 15 on the side have a function as a stopper wall that restricts the amount of movement of the spherical rotating bodies 27 and 27 provided for guiding, which move in the vehicle width direction (left and right in FIG. 7).

The spherical rotating body 27 and the roller-like rotating body 13 are provided at two front and rear positions and are rotatably held by retainers (not shown).

A sub-latch 31 which is pressed by a main latch 29, which will be described later, and engages with the second engaging hole 20 in a disengageable manner is incorporated in the lower rail 1.

As shown in FIG. 2, the sub-latch 31 engages with the bent portion 35 bent downward on one side of the latch body 33 formed in a plate shape, and engages with the second engaging hole 20 on the other side. And a plurality of engaging claws 37 formed in a comb shape,
The central engaging claw portion 37 has a shape bent downward in a short direction in order to increase an engaging area with the engaging hole 20.

The latch body 33 of the sub-latch 31 is slidably assembled in a guide groove 43 of a latch holder 41 whose both ends 39 are fixedly supported by the inner guide portion 23 of the upper rail 3.

The sub-latch 31 is positioned by the biasing spring 45 at the standby position (FIG. 4) retracted from the second engagement hole 20. The urging spring 45 has one end engaged with the spring receiving portion 47 of the latch holder 41 and the other end engaged with the inner wall surface of the bent portion 35 bent from the latch body 33.

On the other hand, an operation lever shaft 51 is rotatably supported on the upper rail 3 by front and rear brackets 49 and 50 fixed to the general portion 21. Operation lever shaft 5
1 has an operating portion 53 on the front end side, and is constantly urged in the counterclockwise direction (arrow A direction) in FIG. 4 by an urging spring 55 provided on the rear end side. This bias spring 55
Is strongly set by the spring pressure of the biasing spring 45 that positions the sub-latch 31 to the standby position. Further, in the region of the rear bracket 50, the operation lever shaft 51 is provided with the above-mentioned main latch 29 at a position where it opposes the sub-latch 31 with the first engaging hole 19 interposed therebetween.

A main body of the main latch 29 has a plurality of comb teeth formed by welding the main body of the latch to the operation lever shaft 51, and at the tip end thereof, which engages with the first engaging hole 19 in a disengageable manner. Engaging claws 57 are provided. Main latch 2
When the engagement with the first engagement hole 19 is completed, the engagement claw portion 57 of the ninth pushes the bent portion 35 of the sub-latch 31 so that the engagement claw portion 37 of the sub-latch 31 and the second engagement hole 20. The size is set so that they can be pushed out to the position where they engage each other.

According to the seat slide device constructed as described above, the operation lever 53 is rotated by the operation portion 53 against the biasing spring 55, and the main latch 29 is retracted from the first engagement hole 19. In the unlocked state, the sub-latch 31 is positioned by the biasing spring 45 at the standby position (FIG. 4) retracted from the second engagement hole 20. In this state, the seat, that is, the upper rail 3 can be moved back and forth. After the seat adjustment is completed, if the hand is released from the operation section 53, the biasing spring 55 causes the main latch 29 to move to the first position.
The engaging claw portion 57 at the front end penetrates the engaging hole 19 and presses the bent portion 35 of the sub-latch 31. At this time, the sub-latch 31 at the standby position is pressed and engages with the second engagement hole 20 from the inside as shown in FIGS. 5 and 6. Therefore, by engaging the main latch 29 and the sub-latch 31, the lock strength can be increased without increasing the plate thickness, and the size of the device is not increased.

Although the sub-latch 31 is provided on the lower rail 1 side fixed to the vehicle body side in this embodiment, it may be provided on the upper rail 3 side fixed to the seat side. .

[0023]

As described above, according to the vehicle seat slide device of the present invention, the locking strength can be improved by the main latch and the sub-latch without increasing the plate thickness. Therefore, it is very preferable in terms of weight reduction. Further, since the sub-latch is incorporated in the rail, the device does not become large.

[Brief description of drawings]

FIG. 1 is a cutaway plan view of a main part according to the present invention.

FIG. 2 is an exploded perspective view showing a mounting state of a sub-latch.

FIG. 3 is an overall perspective view of a seat slide device embodying the present invention.

FIG. 4 is an explanatory diagram when unlocking.

FIG. 5 is an explanatory diagram when locking is in progress.

FIG. 6 is an explanatory diagram when a lock is completed.

7 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Lower Rail 3 Upper Rail 9 Both Side Walls 19 First Engagement Hole 20 Second Engagement Hole 29 Main Latch 31 Sub Latch 45 Energizing Spring (Energizing Means)

Claims (1)

[Scope of utility model registration request] 1. A lower rail fixed to a vehicle body side, an upper rail fixed to a seat side and attached to the lower rail so as to be movable relative to the lower rail, and provided on both side walls of one of the lower rail and the upper rail so as to face each other. A plurality of matching first and second engaging holes, and a main latch which is provided in the other and engages with the first engaging hole so as to be engageable and disengageable from the outside.
The main latch, which is arranged in the rail having the first and second engaging holes, is pressed at the time of engaging with the first engaging hole and can be detachably engaged with the second engaging hole on the opposite side from the inside. A vehicle seat comprising: a sub-latch that is engaged with each other and is supported on the rail side having the main clutch; and a biasing unit that constantly positions the sub-latch to a standby position retracted from the second engagement hole. Slide device.