JP3489669B2 - Lock mechanism for seat slide device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking mechanism for a seat slide device. More specifically, the upper rail is slidably fitted along a fixed rail provided along the front-rear direction of the vehicle floor. The leg frame on the lower surface of the seat cushion of the vehicle seat is attached to the upper rail, the vehicle seat is slidably mounted on the fixed rail, and the upper rail is locked at a predetermined position with respect to the fixed rail. The present invention relates to a lock mechanism of a seat slide device including a slide lock mechanism and a lock release mechanism that releases the locked state.

[0002]

2. Description of the Related Art Normally, vehicle seats on which passengers are seated are installed in front and rear seats in a vehicle, and these vehicle seats have a reclining device capable of appropriately adjusting a backrest angle, and The vehicle is equipped with a seat slide device that can adjust the front-back position of the vehicle seat according to the occupant's body type.

A conventional seat slide device is shown in FIG.
Referring to (b) and FIGS. 6 (a) and 6 (b),
First, in the lock mechanism 1 of the conventional seat slide device shown in FIGS. 5A and 5B, the slide lock hole 5 is formed in the lower horizontal piece 3b of the fixed rail 3 provided from the front side to the rear side of the vehicle floor surface. Is provided for urging the latch claws 8 of the latch 7 of the slide lock provided on the sliding member 2 side from the upper side to the lower side, and the latch claws 8 of the latch 7 are slide-locked on the lower horizontal piece 3b of the fixed rail 3. It is locked in the hole 5.

Further, as shown in FIGS. 6 (a) and 6 (b), the slide lock mechanism 1 includes a lock plate 4 on a lower horizontal piece 3b of a fixed rail 3 provided from the front to the rear of the vehicle floor. The slide lock hole 5 is fixed to the lock plate 4, and the latch claw 8 of the slide lock latch 7 is urged toward the sliding member 2 from the upper side to the lower side. Is locked in the slide hole 5 of the lock plate 4.

[0005]

As described above, the lock mechanism 1 of the conventional seat slide device has a structure in which the latch claw 8 of the slide lock latch 7 is locked in the slide lock hole 5 of the fixed rail 3. A lever for operating the latch 7 of the slide lock is also provided in the vicinity of the fixed rail 3, and particularly in a one-box car such as a wagon car, the seat cushion is seated higher than the floor of the vehicle. In that case, in order to release the lock mechanism of the seat slide device, it is necessary to bend the body forward and operate the operation lever, which requires an unnatural posture and the unlock operation. It has been pointed out that there is a problem that it cannot be done smoothly.

Further, in order to install the operation lever in the vicinity of the fixed rail 3 on the floor surface, it is necessary to avoid interference with the parts mounted on the floor surface, and the operation lever cannot be set at a free position. At the same time, it has been pointed out that the location where the operating lever is installed is restricted. Further, when the leg frame is set high and the seating position of the seat cushion is set high, there is a risk that the lock mechanism may be released due to deformation when an impact load is applied.

The object of the present invention is to enable the unlocking operation of the seat slide device to be carried out smoothly and to eliminate the problem of interference with parts mounted on the floor surface, so that the operating lever can be set to the optimum position and the seating surface When set to a high position, there is no fear that the lock mechanism will be released due to deformation when an impact load is applied, and a lock mechanism for a seat slide device suitable for a one-box car such as a wagon car is provided. is there.

[0008]

The present invention has been made in view of the above problems, and the lock mechanism of the seat slide device according to claim 1 of the present invention is provided along the front-back direction of the floor surface of the vehicle. The upper rail is slidably fitted along the fixed rail, the leg frame on the lower surface of the seat cushion of the vehicle seat is attached to the upper rail, and the vehicle seat is slidably mounted along the fixed rail. Together with a slide lock mechanism that locks the upper rail at a predetermined position with respect to the fixed rail, and a lock mechanism of a seat slide device that includes a lock release mechanism that releases the locked state, the lock mechanism is
Lock holes are opened in the fixed rail at regular intervals along the front-rear direction, and the upper side of the upper rail is slanted.
Mounting bracket with the upper part bent and the lower part bent downward.
A lock pin provided on a lower arm, to which a racket is attached and which is rotatably supported below the attachment bracket, engages with a lock hole of the fixed rail, and is biased by a spring in the engagement direction. The unlocking mechanism includes an upper arm that rotates in synchronism with the lower arm via a connecting shaft that extends in the vertical direction, and the upper arm rotates above the mounting bracket. can mounted, together with the upper arm and the operating lever integrally provided, an upper arm and a lower arm rotationally operated by operating the operating lever to release the engagement between the lock pin and the lock hole, wherein Mounting
Adjusting the vertical length of the bracket and the length of the connecting shaft
Of the operating lever that is integrated with the upper arm by
The feature is that the vertical position is arbitrarily set .

Therefore, according to the invention described in claim 1,
Of the mounting bracket attached to the upper rail
The lower arm, which is bent diagonally downward, supports the lower arm rotatably, and is also bent diagonally above the mounting bracket.
The upper arm is supported on the upper side, which is also rotatable.
The free shaft side of the upper and lower arms is connected by a connecting shaft that extends in the vertical direction, and an operating lever is provided on the upper arm.
By operating the operation lever, the upper arm and the lower arm were synchronously rotated, and the lock pin provided on the lower arm was removed from the lock hole of the fixed rail. Compared with this, the setting position of the operation lever can be set higher, and the operation of the operation lever can be performed easily and quickly. Further, vertical dimension of the bracket Mounting, and the length of the connecting shaft extending in the vertical direction by appropriately adjusting, it is possible to set the optimum position avoiding interference with other components in the vertical position of the operating lever .

Further, in the lock mechanism of the seat slide device according to the second aspect of the present invention, the biasing spring for biasing the lock pin in the locking direction is provided on the rotation shaft of the upper arm. Characterize.

Therefore, according to the second aspect of the present invention, the upper arm is spring-biased in a constant rotation direction by the biasing spring provided on the rotating shaft of the upper arm,
The lower arm is also urged in the same direction via the connecting shaft, and if the lock pin engages with the lock hole of the fixed rail in the same direction as the spring urging direction, a proper lock state is always secured. it can.

According to a third aspect of the present invention, in the lock mechanism of the seat slide device, the stopper piece is provided integrally with the lower arm, and when the lower arm is rotated by a predetermined angle by operating the operation lever. The stopper piece comes into contact with the leg frame of the seat cushion or the mounting bracket to restrict the range of rotation of the lower arm.

Therefore, according to the invention described in claim 3 ,
A stopper piece is provided integrally with the lower arm, and when the lower arm is rotated a predetermined angle by unlocking the operating lever, this stopper piece collides with the leg frame or the mounting bracket. The lock can be unlocked with minimum effort without excessively rotating the lever.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a lock mechanism of a seat slide device according to the present invention will be described in detail with reference to the drawings. 1 is a front view of an embodiment of a vehicle seat according to the present invention, FIG. 2 is an explanatory view showing a configuration of a lock mechanism of a seat slide device installed in the vehicle seat, and FIGS. 3 to 4 are seat slide devices. It is explanatory drawing which respectively shows the lock state in the modification of the lock mechanism of FIG.

In FIG. 1, a vehicle seat 10 installed on the front side of a vehicle includes a seat cushion 11 which is set at a high position with respect to a floor surface F of the vehicle and a seat back 12 which serves as an occupant's back. A seat cushion frame 11a in which a cushion spring or the like is installed is provided below the seat cushion 11, and leg frames 13 that support the seat 10 are extended downward from two positions on the left and right of the seat cushion frame 11a. Has been done.

The vehicle seat 10 is provided with a seat slide device so that the front and rear positions of the seat can be adjusted according to the body shape of the occupant. In this seat slide device, an upper rail 21 attached to a lower edge of the leg frame 13 is slidably fitted and inserted into a fixed rail 20 which is fixed to a floor surface F and extends along the vehicle front-rear direction. Since the upper rail 21 slides along the fixed rail 20, the entire vehicle seat 10 integrated with the upper rail 21 can slide to a predetermined position.

Next, the fixed rail 20 and the upper rail 2
The lock mechanism and the lock release mechanism in the slide device composed of 1 will be described with reference to FIG. 2. The mounting bracket 30 is fixed to the outer surface of the upper rail 21 by welding, screwing, or the like. The upper and lower terminals for attachment are bent obliquely upward at the upper side and obliquely downward at the lower side. Further, the end of the upper leg piece 31 of the bracket 30 forms a curl-shaped bearing portion 31a, and the upper arm 40 is pivoted on the basis of a pivot shaft 31b supported by the bearing portion 31a. Supports possible. On the other hand, the lower leg piece 32 of the mounting bracket 30
Is also formed in a curled shape as the bearing portion 32a, and the lower arm 50 is rotatably supported by the rotation shaft 32b.
The upper arm 40 and the lower arm 50 are connected by a connecting shaft 60 that extends in the vertical direction via a free joint.

Further, the operation lever 70 is attached to the rotating shaft 31b of the upper arm 40 so as to rotate integrally with the upper arm 40, and the stopper piece 71 is also integrally formed with the lower arm 50. It is attached so as to rotate integrally with the rotation of the lower arm 50. Then, by locking the lock pin 80 attached to the lower arm 50 in the lock hole 20a provided in the fixed rail 20, the upper rail 21 is locked with respect to the fixed rail 20 and the vehicle The seat 10 cannot slide at a predetermined position. The rotating shaft 3 of the upper arm 40
A biasing spring 81 is wound around 1b, and the lock pin 80 is biased in a direction to engage with the lock hole 20a.

Next, the unlocked state of the lock mechanism will be described with reference to FIGS. 3 and 4. The seat slide device shown in FIGS. 3 and 4 has the same lock mechanism as that shown in FIG. 2 except for the shapes of the mounting bracket 30 and the upper arm 40, but the basic structure and operation of both are the same. is there.

In the state shown in FIG. 3, the lock pin 80 provided on the lower arm 50 is locked in the lock hole 20a of the fixed rail 20, and the upper rail 21 cannot slide with respect to the fixed rail 20. It shows a different state.
Then, in order to release this locked state, as shown in FIG. 4, the operation lever 70 is lifted upward, and the upper arm 40 rotates integrally with the operation lever 70 in the counterclockwise direction in FIG. , A connecting shaft 6 extending vertically
The lower arm 50 rotates through the same angle as the upper arm 40.

When the lock pin 80 attached to the lower arm 50 is disengaged from the lock hole 20a of the fixed rail 20, the locked state is released, and the upper rail 21, that is, the vehicle seat, with respect to the fixed rail 20 is released. 10 is slidable in the front-back direction.

When the hand is released from the operation lever 70 at an appropriate position, the upper arm 40 and the lower arm 50 are moved by the spring force of the urging spring 81 installed on the rotation fulcrum side of the upper arm 40. 3) The lock pin 80 is biased in the clockwise direction, so that the lock pin 80 is locked in the lock hole 20a of the fixed rail 20.
It fits inside and becomes locked at its predetermined position.

As described above, the lock mechanism and the lock release mechanism in the seat slide device according to the present invention are locked by locking the lock pin 80 provided on the lower arm 50 in the lock hole 20a of the fixed rail 20. The operating lever 70 for operating the lock mechanism portion connects the upper arm 40 to the lower arm 50 via the connecting shaft 60 extending in the vertical direction, and the operating lever 70 is connected to the upper arm 40. The operating lever 70 can be disposed at an upper position that is remote from the lock mechanism, and the vertical dimension of the leg frame 13 can be increased so that the seat cushion 11 can be seated higher in a wagon car or the like. Since the setting position of the operation lever 70 can be set to the upper side in correspondence with the type of seat in which the length is set to be long There is no need to operate crouched, can be carried out without difficulty unlocking operation in a natural posture, it is possible to improve the usability.

Further, although the space between the vehicle seat 10 and the lower portion of the floor surface F is easily restricted, by appropriately setting the distance between the upper arm 40 and the lower arm 50, The setting position of the operation lever 70 can be arranged at an appropriate position where it does not interfere with other components, and can be set at an optimum position in consideration of the balance with the counterpart component.

Further, since the stopper piece 71 provided on the lower arm 50 restricts the further movement by the stopper piece 71 when the lock pin 80 is disengaged from the lock hole 20a of the fixed rail 20, the operation lever is operated. 7
The operation stroke of 0 can be suppressed to the minimum necessary,
It is possible to save unnecessary work for unlocking operation,
Efficient unlock operation can be expected.

[0026]

The above is the embodiment of the lock mechanism of the seat slide device according to the present invention. Claim 1 of the present invention
According to the lock mechanism of the seat slide device described in (3), lock holes are formed in the fixed rail at predetermined pitches along the front-rear direction, and the upper rail is slanted upward.
A mounting bra that is bent upwards and diagonally downwards
And a lock pin provided on a lower arm rotatably supported below the mounting bracket engages with the lock hole of the fixed rail and is spring-biased in the engagement direction by a spring. The unlocking mechanism includes an upper arm that rotates in synchronism with the lower arm via a connecting shaft extending in the vertical direction, and the upper arm rotates above the mounting bracket. It is movably attached, and an operating lever is provided integrally with the upper arm, and the upper arm and the lower arm are rotatably operated by operating the operating lever to release the engagement between the lock pin and the lock hole , For mounting
Adjust the vertical length of the bracket and the connecting shaft length.
The operating lever that is integrated with the upper arm by
Since the lower position is set arbitrarily, the setting position of the operation lever can be set higher than the lock position of the lock member, and it is possible to operate the operation lever without forcing the occupant's force. It is possible to enhance the operability in releasing. Also, by appropriately adjusting the vertical dimension of the mounting bracket and the length of the connecting shaft extending in the vertical direction, the vertical position of the operation lever can be set to an optimum position that avoids interference with other parts, The degree of freedom in the setting position of the operating lever can be increased.

Further, according to the lock mechanism of the seat slide device of the second aspect of the present invention, the upper arm is provided with a spring in a fixed rotation direction by the biasing spring provided on the rotating shaft of the upper arm. The lower arm is biased in the same direction via the connecting shaft, and if the lock pin is engaged with the lock hole of the fixed rail in the same direction as the spring biasing direction, a proper lock is always achieved. The state can be secured.

Further, according to the lock mechanism of the seat slide device of the third aspect , the stopper piece is provided integrally with the lower arm, and the lower arm is rotated by a predetermined angle when the operation lever is unlocked. When operated, this stopper piece collides with the leg frame or the mounting bracket , so that the lock can be unlocked with minimum effort without excessively rotating the operation lever. .

According to the present invention, the unlocking operation of the seat slide device can be smoothly performed, and there is no problem such as interference with parts attached to the floor surface, and the operation lever can be set to the optimum position and the seating surface When set at a high position, there is no risk of the lock mechanism being released due to deformation when an impact load is applied, and a lock mechanism for a seat slide device suitable for a one-box car such as a wagon car can be obtained. .

[Brief description of drawings]

FIG. 1 is a front view of a vehicle seat to which a lock mechanism of a seat slide device according to the present invention is applied.

FIG. 2 is a structural explanatory view showing a structure of a lock mechanism in the lock mechanism of the seat slide device according to the present invention.

FIG. 3 is a structural explanatory view showing a modification of the lock mechanism in the lock mechanism of the seat slide device according to the present invention.

FIG. 4 is a structural explanatory view showing an unlocked state in the lock mechanism shown in FIG.

5A and 5B show a lock mechanism of a conventional seat slide device, in which FIG. 5A is a perspective view of the slide lock mechanism, and FIG.
[FIG. 3] is a sectional view of a slide lock mechanism.

6A and 6B show a lock mechanism of a conventional seat slide device, in which FIG. 6A is a perspective view of the slide lock mechanism, and FIG.
[FIG. 3] is a sectional view of a slide lock mechanism.

[Explanation of symbols]

For 10 vehicle seat 11 seat cushion 12 seat back 13 leg frame 20 fixed rail 20a lock hole 21 upper rail 30 mounting bracket 31 upper leg 32 lower leg 40 upper arm 50 the lower arm 60 coupling shaft 70 Misao Saclay bar 71 stopper piece 80 lock pin 81 urging spring F floor surface

Claims (3)

(57) [Claims] 1. An upper rail is slidably fitted along a fixed rail provided along the front-rear direction of a vehicle floor surface, and a leg frame on a lower surface of a seat cushion of a vehicle seat is attached to the upper rail. A seat slide in which a vehicle seat is mounted slidably along a fixed rail, and includes a slide lock mechanism for locking the upper rail at a predetermined position with respect to the fixed rail, and a lock release mechanism for releasing the locked state. In the lock mechanism of the device, in the lock mechanism, lock holes are formed in the fixed rail at predetermined pitches along the front-rear direction, and the upper side of the upper rail is obliquely upward,
A mounting bracket with the lower part bent diagonally downward is installed.
And a lock pin provided on a lower arm rotatably supported below the mounting bracket engages with a lock hole of the fixed rail and is biased by a spring in the engagement direction. The lock release mechanism includes the lower arm and the upper and lower parts.
An upper arm that rotates in synchronism via a connecting shaft extending in a direction, the upper arm being rotatably mounted on an upper portion of a mounting bracket, and an operating lever provided integrally with the upper arm, an upper arm and a lower arm rotationally operated by the operation of the lever, while releasing the engagement between the lock pin and the lock hole, the mounting bracket
By adjusting the vertical length and the connecting shaft length
Control the vertical position of the operating lever that is integrated with the upper arm.
A locking mechanism for a seat slide device, which can be set arbitrarily. 2. The lock mechanism of the seat slide device according to claim 1, wherein a biasing spring that biases the lock pin in a locking direction is provided on a rotation shaft of the upper arm. 3. A stopper piece is provided integrally with the lower arm, and when the lower arm is rotated a predetermined angle by the operation of the operation lever, the stopper piece causes the leg frame of the seat cushion or the mounting bracket. The lock mechanism of the seat slide device according to claim 1 or 2, wherein the rotation range of the lower arm is regulated by abutting on the lock mechanism.