JPH0699768A - Seat sliding device for automobile - Google Patents

Abstract

PURPOSE:To prevent the slide rail of a seat slide device from being brought into a free state even during head-on collision of an automobile. CONSTITUTION:A pair of left and right slide rails 5 and 6 formed such that a lower rail 2 fixed on the car body floor 1 side and an upper rail 4 fixed on the seat 3 side are relatively movably assembled together are provided. Engaging parts 10 engaged with an engaging part 9 formed on the lower rails 2 side and designed to lock the slide rails 5 and 6 are arranged to operation lever shafts 7 and 8 mounted on the respective upper rails 4. The two operation levers 7 and 8 are interlocked through a coupling wire 11 so as to be rotatable in a reverse direction to each other. The slide rails 5 and 6 are releasable from locking through rotation operation of one operation lever shaft 7. In a so formed seat slide device for an automobile, a mounting point P1 on the central side in the direction of a car width of the coupling wire 11 is positioned closer to the front side of a car body than a mounting point P2 situated on the outer side in the direction of a car width thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat slide device provided between a seat and a vehicle body floor for adjusting the position of the seat in the longitudinal direction of the vehicle body.

[0002]

2. Description of the Related Art A vehicle seat (especially, a front seat) is provided with a seat slide device whose position can be adjusted in the front-rear direction of a vehicle body in order to match the height of an occupant.

As the seat slide device, as shown in FIG. 1, a lower rail 2 fixed to the vehicle body floor 1 side.
And a pair of left and right slide rails 5, in which the upper rail 4 fixed to the seat 3 side is assembled so as to be relatively movable,
6 are provided, and the operation lever shafts 7 and 8 respectively mounted on the upper rails 4 are engaged with a large number of engaging portions 9, 9 ... Formed on the lower rail 2 side to slide the slide rails 5 and 8. There is one in which a locking portion 10 for locking 6 is provided and the seat 3 is adjusted to a predetermined position by the engagement of the locking portion 10 with the selected engaging portion 9. The operation lever shafts 7 and 8 are connected to each other via a connecting wire 11 so as to be rotatable in opposite directions, and the slide rails 5 and 6 are locked by rotating one of the operation lever shafts 7. There is one that can be released (see, for example, Japanese Utility Model Laid-Open No. 3-88847).

[0004]

By the way, in the case of the seat slide device of the above-mentioned known example, as shown in FIG. 5, the connecting wire 11 is located on the center side in the vehicle width direction (in other words, on the tunnel 1a side). Mounting point P ₁ on slide rail 6 side
And the mounting point P ₂ on the side of the slide rail 5 located on the outer side in the vehicle width direction are located on a line orthogonal to the vehicle body front-rear direction.

On the other hand, in the case of a head-on collision of an automobile, the engine often moves backward due to the impact load at the time of a collision. In that case, the center portion in the vehicle width direction is largely deformed on the vehicle body floor. Then, as shown in FIG.
The slide rail 6 on the vehicle width direction center side in the seat slide device moves rearward (that is, in the direction of arrow Q), and the connecting wire 11 is pulled. In this state, the operating lever shafts 7 and 8 may be rotated in the unlocking direction depending on the pulling force of the connecting wire 11. In that case, the seat slide device becomes free, and the occupant is not restrained. May be sufficient.

The present invention has been made in view of the above points, and it is an object of the present invention to prevent the seat slide device from being in a free state even when a vehicle has a head-on collision.

[0007]

According to the present invention, as a means for solving the above-mentioned problems, a pair of left and right sides are formed by assembling a lower rail fixed to a vehicle body floor side and an upper rail fixed to a seat side so as to be relatively movable. The slide rails, the operation lever shafts respectively mounted on the upper rails are provided with locking portions that engage with the engagement portions formed on the lower rails to lock the slide rails, and A seat slide device for an automobile configured to connect lever shafts via connecting wires so as to be rotatable in mutually opposite directions, and to unlock the slide rails by rotating an operation lever shaft. The attachment point of the connecting wire on the center side in the vehicle width direction is located on the front side of the vehicle body with respect to the attachment point on the outer side in the vehicle width direction.

[0008]

In the present invention, the following actions can be obtained by the above means.

That is, when the vehicle body is deformed due to the rearward movement of the engine at the time of a head-on collision of the automobile, the slide rail located on the center side in the vehicle width direction of the seat slide device is moved rearward. Since the attachment point on the center side in the direction of the vehicle is located on the front side of the vehicle body with respect to the attachment point on the outside of the vehicle width direction, the connecting wire will sag when the slide rail located on the center side in the vehicle width direction moves rearward. , There is no need to rotate the operation lever shaft.

[0010]

According to the present invention, there are provided a pair of left and right slide rails which are assembled so that the lower rail fixed to the vehicle body floor side and the upper rail fixed to the seat side can be moved relative to each other. The operation lever shaft is provided with a locking portion that locks the slide rail by engaging with the engagement portion formed on the lower rail side, and the both operation lever shafts are rotatable in opposite directions. In the vehicle seat slide device configured to be connected via the connecting wire as described above, and the lock of the slide rail can be released by the rotation operation of the operation lever shaft, the attachment of the connecting wire at the center side in the vehicle width direction The point is located on the front side of the vehicle body with respect to the mounting point on the outside in the vehicle width direction, and the vehicle body floor is deformed due to the rearward movement of the engine when the vehicle crashes When the slide rail positioned on the center side in the vehicle width direction moves backward due to the deformation, the connecting wire is slackened so that the operation lever shaft is not rotated unlike the conventional example, and the slide rail is unlocked. Is reliably prevented, and there is an excellent effect that the safety of passengers can be secured.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

The vehicle seat slide device of this embodiment has substantially the same structure as that described in the section of the prior art.

That is, the seat slide device of this embodiment also
As shown in FIG. 1, a pair of left and right slide rails 5 and 6 are formed by assembling a lower rail 2 fixed to the vehicle body floor 1 side and an upper rail 4 fixed to the seat 3 side so as to be movable relative to each other. Locking to lock the slide rails 5 and 6 by engaging the operation lever shafts 7 and 8 respectively mounted on the upper rails 4 with a plurality of engaging portions 9 and 9 formed on the lower rail 2 side. A portion 10 is provided and the seat 3 is adjusted to a predetermined position by engaging the locking portion 10 with the selected engaging portion 9.
In FIG. 1, reference numeral 12 is a bracket for rotatably attaching the operation lever shaft 7 to the upper rail 4 of the slide rail 5 located outside in the vehicle width direction, and 13 is the bracket for attaching the operation lever shaft 8 to the vehicle width direction center side (that is, Brackets for rotatably attaching to the upper rails 4 of the slide rails 6 located on the tunnel portion 1a side), and 15 and 16 for attaching legs for fixing the lower rails 2 and 2 of the slide rails 5 and 6 to the vehicle body floor 1. Is.

As shown in FIG. 2, the engaging portions 9, 9, ... Are formed on the side surfaces of a rail member 17 having a U-shaped cross section which is fixed to the opposite side surfaces of each of the lower rails 2. The locking portion 10 is supported so as to be rotatable with the operation lever shafts 7 and 8, and
When the operating lever shaft 8 is rotated in the counterclockwise direction, the selected one of the engaging portions 9, 9 ... Is engaged. As a result, the slide rails 5 and 6 are locked and the seat 3 is adjusted in position. Reference numeral 18 is a spring for urging the operation lever shafts 7, 8 in the lock direction, and 19 is an operation handle for rotating the operation lever shaft 7 located on the side surface in the vehicle width direction.

The operation lever shafts 7 and 8 are connected to each other via a connecting wire 11 so as to be rotatable in opposite directions. The operation of the operation lever shaft 7 causes the slide rails 5 and 8 to rotate. 6 locks can be released at the same time. Reference numerals 20 and 21 are operation lever shafts 7 and 8.
Both ends of the connecting wire 11 are attached by attachment pieces fixed to the.

Therefore, in this embodiment, the attachment point P ₁ (in other words, the attachment piece 21) on the center side in the vehicle width direction of the connecting wire 11 (that is, the tunnel portion 1a side) is located outside the vehicle width direction. It is located on the front side of the vehicle body with respect to the mounting point P ₂ (in other words, the mounting piece 20) (see FIG. 3).

The vehicle seat slide device constructed as described above operates as follows.

When the vehicle body floor 1 is deformed due to the rearward movement of the engine at the time of a head-on collision of an automobile, as shown in FIG. 4, the slide rail 6 located on the center side in the vehicle width direction of the seat slide device is indicated by an arrow Q. Although the vehicle moves rearward as shown, the attachment point P ₁ of the connecting wire 11 on the vehicle width direction center side is positioned on the vehicle body front side with respect to the vehicle width direction outer side attachment point P _{2 of} the vehicle width direction. The connecting wire 11 is slackened when the slide rail 6 positioned at is moved backward.

Therefore, unlike the conventional example, the pulling force of the connecting wire 11 does not act on the operating lever shafts 7 and 8, so that the operating lever shafts 7 and 8 do not rotate, and the engaging portion 9 is engaged. The engagement of the locking portion 10 is not released. That is, the lock on the slide rails 5 and 6 is not released, and the safety of the occupant can be ensured.

The invention of the present application is not limited to the configuration of the above embodiment, and it goes without saying that the design can be changed as appropriate without departing from the scope of the invention.

[Brief description of drawings]

FIG. 1 is a perspective view showing a seat slide device for an automobile according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part of a vehicle seat slide device according to an embodiment of the present invention.

FIG. 3 is a schematic view showing a normal state of a vehicle seat slide device according to an embodiment of the present invention.

FIG. 4 is a schematic diagram showing a state of a vehicle seat slide device according to an embodiment of the present invention at the time of a head-on collision.

FIG. 5 is a schematic plan view showing a normal state of a conventional vehicle seat slide device.

FIG. 6 is a schematic plan view showing a state of a conventional vehicle seat slide device at the time of a head-on collision.

[Explanation of symbols]

1 is a vehicle floor, 2 is a lower rail, 3 is a seat, 4 is an upper rail, 5 and 6 are slide rails, 7 and 8 are operation lever shafts, 9 is an engaging portion, 10 is a locking portion, 11 is a connecting wire,
P ₁ and P ₂ are attachment points on both ends of the connecting wire.

Claims (1)

[Claims] 1. A pair of left and right slide rails in which a lower rail fixed to a vehicle body floor side and an upper rail fixed to a seat side are relatively movably assembled to each other, and operation lever shafts respectively attached to the upper rails are provided. ,
An engaging portion that engages with an engaging portion formed on each of the lower rails to lock the slide rail is provided, and the both operating lever shafts are connected via a connecting wire so as to be rotatable in opposite directions. A vehicle seat slide device configured to be connected and to unlock the slide rail by rotating one of the operation lever shafts, wherein the attachment point of the connection wire on the vehicle width direction center side is: A seat slide device for an automobile, characterized in that the seat slide device is located on the front side of the vehicle body with respect to the attachment point on the outer side in the vehicle width direction.