JP3462117B2 - Lock structure of seat slide device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is so-called that the operation of a pair of inner and outer rail bodies can be restricted or released under the synchronized locking operation of locking means provided on each rail body. The present invention relates to a lock structure for a double-sided lock type seat slide device.

[0002]

2. Description of the Related Art Normally, a seat for a vehicle such as an automobile, particularly a front seat of an automobile is supported by a seat slide device interposed between the seat and a floor so as to be slidable in the front-rear direction.

This seat slide device has a pair of rails in which a runner (also called an upper rail or the like) fixed to the seat side is slidably assembled to a fixed guide rail (also called a lower rail or the like) on the floor side. The body is arranged between the seat and the floor surface at the separated positions on the inner side (closer to the center) and the outer side (closer to the outside) in the lateral width direction of the vehicle. In this type of seat slide device, lock means that can be released by a release lever is provided on each of the inner and outer rail bodies, and the lock means operates in synchronization with each lock means or lock-off operation. so,
Slider regulation of the runner with respect to the guide rail and cancellation of the regulation can be performed integrally.

As a locking means in this type of rail body, for example, a form in which a lock claw of a lock plate is inserted into and engaged with a series of lock holes formed in a bottom wall of the guide rail, or a top opening of the guide rail is suspended. There is known a so-called latch-type configuration in which a series of lock claws formed on one piece is inserted into and engaged with a lock hole of a lock plate.

In such a latch-type locking means, a lock plate provided on the runner, which is movable up and down, for example, rotatable, is inserted between the lock hole and the lock claw under the biasing force of the lock spring. It is biased in the engagement direction, that is, the lock-on direction. The inner-side and outer-side lock plates are operably connected to each other via a release lever having a substantially U-shape in plan view, which is installed and pivotally installed between the runners on each side.

[0006]

The guide rail of the rail body is usually fixed to the floor or the like by bolts or the like. However, since this bolt is inserted into an insertion hole of a guide rail that is a so-called stupid hole having a relatively larger diameter than that of the bolt, the bolt is screwed to the floor surface, etc. Only the amount corresponding to the diameter difference,
The position of the guide rail, and thus of the rail body, may be displaced between the inner and outer parts.

Such a positional deviation of the rail body between the inner and outer parts may adversely affect the operation of the release lever and the lock-on and lock-off operations of the lock plate. By using a jig or the like to prevent the rail body from being displaced, the accuracy of the rail body mounting is improved. However, since the accuracy of the mounting work using such a jig or the like is complicated, the workability is unavoidably deteriorated.

In a front seat of an automobile, etc., a belt anchor for a seat belt is usually provided on the inner runner, so that an excessive load from the seat belt may occur during a frontal collision (a frontal collision). , The runner of the rail body tends to be pulled forward. Therefore,
Conventionally, strengthening the mounting strength of the inner rail body,
By increasing the rigidity of the runners and the guide rails, it is considered that the lock-on holding property at the time of a frontal collision is improved, thereby further improving the safety of the front seat and the like.

However, the strengthening of the mounting strength and the rigidity of the runners and the guide rails not only lead to a complicated overall structure and increase in size and weight of the rail body, but also between the inner and outer rail bodies. Since there is a possibility that the members will not be commonly used, it is not preferable from the viewpoint of cost.

It is an object of the present invention to provide a lock structure for a seat slide device which facilitates the work of mounting the rail body and further enhances the lock-on holding property of the inner side locking means.

[0011]

In order to achieve this object, according to the present invention, a release lever having a substantially U-shaped plane is installed and pivotally mounted between the runners on the inner side and the outer side. The inner side end is linked to the inner side lock plate via an integral inner side engaging pin, while the release lever is provided with a separate sub-lever at least on the outer side end. . And, the outer side end of the release lever is connected to the outer side sub-lever so as to be rotatable only in a direction corresponding to the lock-on direction of the release lever,
It is supported and elastically biased and held at a predetermined initial position with respect to the outer side sub-lever by a support spring, and a cam that can press the outer side lock plate in the lock-off direction is rotatable on the outer side runner. The outer side sub-lever is provided and is linked to the sub-lever via an outer side engagement pin protruding from the outer side sub-lever. Further, while the inner side lock plate is directly controlled by the release lever, the outer side lock plate is locked by the rotation of this cam linked with the operation of the release lever. The operation is controlled so that the state can be maintained from the off state and the lock on can be delayed on the inner side lock plate.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the lock structure of the seat slide device according to the present invention, as shown in FIG. 1, the seat slide device 10 includes the locking means 12-I, 12-O, the inner and outer rail bodies 14-I. , 14-O, each of which is provided so as to be synchronously operated under the operation of the release lever 16, is formed as a so-called double-sided lock type.

As can be seen from FIG. 2 and FIG. 3 in addition to FIG. 1, as the rail bodies 14-I, 14-O, for example, runners (also called upper rails) 18-I, 18-O are used. ,
An example is a structure in which guide rails (also referred to as lower rails) 20-I and 20-O are slidably assembled via rollers such as rollers 22. But this kind of rail body 14-
The configuration of I, 14-O is well known, and since it is not the gist of the present invention per se, detailed description of the basic configuration of the rail body is omitted here.

Here, as shown in FIGS. 1 to 3, locking means 12-I, 12-O in this type of rail body 14-I, 14-O.
As a known example, a so-called latch-type configuration is known in which the lock plates 24-I and 24-O on the runner 18-I and 18-O side move up and down to exhibit their lock-on and lock-off operations.

As can be seen from FIG. 1, in the embodiment of the present invention, the runners 18-I and 18-O are respectively formed as a combination of two plates, and arm-shaped lock plates 24-I. , 24-O are rotatably arranged and connected between the two plates by a pivot pin 26.
Then, as shown in FIGS. 1 to 3, the horizontal bending pieces 24a formed at the free ends of the lock plates 24-I, 24-O,
While the lock hole 28 is formed by penetrating in the vertical direction,
A series of lock claws 30 that can be inserted and engaged in this lock hole
The guide rails 20-I and 20-O are formed on the upper opening hanging pieces 20a.

The lock plates 24-I and 24-O are
For example, under the biasing force of the lock spring 32, which serves as a torsion spring having one end 32a locked to the runners 18-I, 18-O,
The engagement direction of the lock hole 28 with the lock claw 30 is biased in the lock-on direction.

The rotation of the lock plates 24-I, 24-O, that is, the lock-on and lock-off operations of the lock means 12-I, 12-O is performed between the runners 18-I, 18-O, for example. Erection,
It is controllable by a pivotally supported release lever 16 having a substantially U-shape in a plane.

As shown in FIGS. 1 to 3, in the present invention, the release lever 16 having the center portion as the front end 16a has inner and outer end portions, that is, inner side end 16-Ib,
At the outer side end 16-Ob, for example, a separate sub-lever 34-I,
The release lever is rotatably supported between the runners under the pivotal attachment of the sub-lever by the support pin 38.

Then, for example, a torsion spring serving as a return spring 40 is wound around the support pin 38, and each end of the runner 18-I, 18-O and the sub-lever 34-I, 34-O is engaged. Under the biasing force generated by the stop, the release lever 16
16a is biased downward, that is, counterclockwise in the figure.

As shown in FIGS. 1 and 2, the inner side end 16b-I of the release lever is, for example, a tip piece having a substantially U-shaped notch.
34a and a locking piece 34b projecting from the rear (right side in the figure) of the sub-lever 34-I are integrally rotatably fixed to the sub-lever 34-I. Through the inner side engagement pin 42-I protruding from the inner side lock plate 24.
-I is linked to this inner sub lever so that it can be interlocked.

On the other hand, in the present invention, as can be seen from FIGS. 1 and 3, the outer side end 16b-O of the release lever is shown.
But the outer side sub-lever 34-O, the direction that matches the lock-on direction of the release lever 16, that is only rotatably connected in a counterclockwise direction in the drawing, is supported by the support spring 43, the predetermined relative outer side sub-lever It is elastically biased and held at the initial position (see the alternate long and short dash line in FIG. 3).

The outer side sub-lever 34-O has a tip piece 34c in the form of a downward opening, and is locked by a locking piece 34d protruding rearward (to the right in the figure) of the outer lever of the release lever. The side ends 16b-O are rotatably connected and supported.

In this construction, since the tip piece 34c of the outer side sub-lever is opened downward, the release lever 16 with respect to the outer side sub-lever downwardly centered around the locking piece 34d, that is, counterclockwise in FIG. Only the turning of the release lever is ensured by the tip piece, and conversely, the turning of the release lever with respect to the outer side sub-lever in the direction coinciding with the lock-off direction may be locked by the tip piece and the locking piece. Is regulated by.
That is, also in the configuration of the present invention, when the release lever 16 is operated in the lock-off direction, the release lever is rotated integrally with the outer side sub-lever 34-O.

As the support spring 43, for example, the outer side sub-lever 3 is provided below the outer side end 16b-O of the release lever.
A leaf spring having a fixed base end can be used for the 4-O support piece 34e.

In the embodiment of the present invention, the outer side sub-lever 34-O, that is, the outer side end 16b-O of the release lever is rotatably provided on the outer runner 18-O by the cam 44. Is connected to the outer side sub-lever via an engagement pin (outer side engagement pin) 42-O so that its rotation can be transmitted to the outer side lock plate 24-O via this cam. Has been done.

As can be seen from FIG. 3, the cam 44
Is formed so that the operation of the outer side lock plate can be controlled under the engagement and pressing with the engagement end 24b of the outer side lock plate 24-O. The operation is controlled so that the lock-off preceding the inner lock plate 24-I can be maintained and the lock-on delayed by the inner lock plate can be maintained.

That is, in the lock structure of this construction, the inner side locking means 12-I is directly controlled by the release lever 16, while the outer side locking means 12 is controlled.
The operation of -O is indirectly controlled via the cam 44.

Although the cam 44 is pivotally attached to the outer runner 18-O by the pivot pin 46, it is connected to the outer end 16b-O of the release lever, that is, the engagement pin 42-O of the outer sublever. The deviation of the rotation locus is ensured by, for example, making the cam insertion hole 48 an elongated hole.

Further, as shown in FIGS. 1 to 3, the operation range of the release lever 16, that is, the rotation range of the inner side and outer side lock plates 24-I, 24-O is the runners 18-I, 18. It can be defined by inserting the engaging pins 42-I, 42-O into the elongated hole-shaped guide hole 50 formed in -O.

The operation of the inner-side and outer-side locking means 12-I, 12-O interlocking with the release lever 16 will be described below.

As shown in FIG. 2, when the release lever 16 is not operated, the release lever is biased and held by the biasing force of the return spring 40 at a substantially horizontal lower position which is an initial position. In the inner side rail body locking means 12-I,
The lock plate 24-I is pushed up by the engagement pin 46.
Is held at the engagement position of the lock claw 30 and the lock hole 28, that is, at the lock-on position. The inner lock plate 24-I is biased and held at the lock-on position even under the biasing force of the lock spring 32.

Further, as shown in FIG. 3, when the external force or the like is not applied, the outer side end 16b-O of the release lever is initially moved with respect to the outer side sub-lever 34-O under the biasing force of the support spring 43. Biased and held in position (see solid line). Then, the outer side locking means 12 accompanying non-operation of the release lever 16
In the initial state of -O, the cam 44 is biased in the direction of releasing the pressing force with respect to the engagement end 24b of the lock plate under the biasing force of the return spring 40. Lock-on by 24-O is maintained.

The fact that the lock spring 32 is biased and held at its lock-on position under the biasing force of the lock spring 32 is the same in the outer lock plate 24-O.

From the initial lock-on state, when the tip of the release lever 16 is pulled in the lock-off direction, that is, upward, as shown in FIG. 2, the inner side lock by the engagement pin 42-I of the inner side sub-lever is performed. Engaging end of plate 24-I
The inner side lock plate starts to rotate in the lock-off direction (counterclockwise direction in the drawing) by the engagement and pressing of the 24c, and as shown in FIG.
44 is rotated clockwise in the figure under the rotation of the outer side sub-lever 34-O that is integral with the release lever, and the outer side is rotated by the engagement and pressing of the engagement end 24b by the rotation of this cam. The lock plate 24-O is rotated in the lock-off direction (counterclockwise direction in the figure).

At this time, the inner lock plate 24-I rotates in the lock-off direction substantially corresponding to the rotation angle of the release lever 16, while the outer lock plate 24-O interlocks with the release lever. Since the operation is controlled by the rotation of the cam 44, as shown in FIGS. 4 (A) and 4 (B), even when the operation is interlocked with the release lever, the outer side lock plate has the cam engagement end 24b. By pressing, the lock-off is performed prior to the inner lock plate. That is, in the lock structure of the present invention, there is a lock-off state only for the outer side locking means 12-O, and conversely, a lock-on state only for the inner side locking means 12-I, as shown in the figure. .

Then, when the release lever 16 is further pulled up, the inner lock plate 24-I is locked off later than the outer lock plate 24-O, as shown in FIGS. , Runner 18- for guide rails 20-I, 20-O
The slide of I, 18-O, that is, the operation of the rail bodies 14-I, 14-O becomes possible.

Further, when the operating force of the release lever 16 is released or loosened from the lock-off state of the lock means 12-I, 12-O on both the inner side and the outer side, as shown in FIG.
As shown in (B), by the rotation of the inner lock plate 24-I with the return of the release lever toward the initial position,
While the inner lock hole 28 and the lock claw 30 are partially locked as shown in the figure, the outer lock plate 24-O is left in the lock-off state by the cam 44. Be done. That is, during the lock-on operation, the inner side locking means 12-I is locked on prior to the outer side locking means 12-O.

Then, when the release lever 16 is further returned to the initial position and the cam 44 is rotated to the pressing release position with respect to the engaging end 24b, the outer side lock plate 24-O lags behind the inner side lock plate 24-I. The lock is turned on, and the locking means 12-I, 12-O on both the inner side and the outer side are returned to the lock-on state (see FIGS. 2 and 3).

In this type of seat slide device 10, since a belt anchor (not shown) of a seat belt is usually connected to the inner runner 18-I, in an emergency such as a frontal collision, Excessive forward traction force acts on the inner runner.

Therefore, in the lock-on state (initial state) shown in FIGS. 2 and 3, it is assumed that an excessive traction force in the forward tilt direction acts on the inner runner 18-I due to a front collision or the like.
At this time, when the inner-side runner 18-I tilts forward, the release lever 16 tries to rotate in the forward tilt direction, that is, downward, accordingly, but in the present invention, the outer-side end 16b of the release lever 16b. -O is the outer side sub-lever 34-O,
The release lever is rotatable in a direction that coincides with the lock-on direction of the release lever, that is, when the release lever is turned downward from the inner side end 16b-I, the release lever moves
It is rotated downward against the biasing force of the support spring 43 at the outer side end (see the alternate long and short dash line in FIG. 3).

That is, according to the present invention, even if the load in the forward tilting direction acts on the inner runner 18-I, the release lever 16
Is rotated in accordance with it, the influence of the forward tilt of the inner runner on the inner lock plate 24-I is reliably suppressed. Therefore, according to the present invention, the lock-on holding property at the time of a frontal collision is further enhanced.

Then, the guide rail 20 on the inner side
-I holding strength, runner 18-I, and guide rail rigidity are not required, and the lock-on retention is sufficiently enhanced, which complicates the configuration and the inner rail body 14-I. It is possible to reliably prevent an increase in size and weight. Further, since the members can be shared between the inner and outer rail bodies 14-I and 14-O, the cost can be reduced.

Further, in the present invention, the release lever 16
Rotation of the inner side and outer side locking means 12-I, 1
2-O is controlled to operate synchronously, but since the outer side end 16b-O of the release lever and the outer side sub-lever 34-O are only rotatable and elastically connected and supported, Even if the operating angle deviation caused by the positional deviation between the inner and outer rail bodies 14-I and 14-O occurs between the inner side end 16b-I and the outer side end 16b-O of the release lever, this release lever The movement angle deviation can be sufficiently absorbed by the rotation between the outer side end and the outer side sub-lever, or the clearance for ensuring the rotation.

That is, according to the present invention, the inner side end 16b-I and the outer side end 16b-O of the release lever are caused by the positional deviation between the inner and outer rail bodies 14-I, 14-O. Even if there is a deviation in the operating angle between the rails, the deviation does not directly affect the operation of the locking means 12-I, 12-O on the inner and outer sides, so the mounting accuracy of each rail body is sufficient. It can be relaxed and the work using a jig etc. at the time of mounting can be omitted.

Therefore, by simplifying the mounting work, the workability at the time of mounting the inner and outer rail bodies 14-I, 14-O, that is, the seat slide device 10, can be sufficiently improved.

In the present invention, the outer side
The outer lock plate 24-O to the locking means 12-O.
Since a cam 44 for controlling is provided, by this cam,
The priority lock-on operation of the inner lock means 12-I is
Get rid of.

[0048]

That is, when the inner side locking means 12-I is locked off, the outer side locking means 12-O is not locked on. Therefore, the phenomenon that only the outer side locking means is locked on is surely caused in this configuration. Will be eliminated. Therefore, according to this configuration, the lock-on of the inner side locking means 12-I becomes more reliable.

In this configuration, it is sufficient to rotate the inner side and outer side lock plates 24-I, 24-O within a range where the lock claw 30 and the lock hole 28 are locked and locked off. The stroke of the lock plate in the guide rails 20-I, 20-O is minimized on either side. Therefore, the cross-sectional height of the guide rails 20-I, 20-O can be suppressed, so that the guide rail can be downsized, and the rail bodies 14-I, 14-O can be downsized, and the cost can be reduced. It will be possible.

Furthermore, without changing the stroke of the lock plate or the length of the lock claw, the lock plates 24-I, 2
Since the timing of turning 4-O, and eventually the lock-on and lock-off of lock means 12-I, 12-O on the inner side and outer side is shifted by the cam 44, the guide rail 20- I / 20-O can be shared also in this respect, and the cost can be sufficiently reduced.

Then, the cam 44 accompanying the operation of the release lever 16
The rotation angle of is necessarily larger than the rotation angle of the outer lock plate 24-O. In other words, even if the operation of the cam 44 varies due to the operation of the release lever 16, this variation can be sufficiently absorbed under the operation of the cam.
The operation shift of -O can be sufficiently suppressed from this point as well.

Therefore, also from this point, the workability at the time of mounting the seat slide device 10 can be sufficiently improved.

Here, in the embodiment of the present invention, the inner side end 16b-I and the outer side end 16b-O of the release lever are both separate inner side sublever 34-I and outer side sublever 34-O. However, since the inner side sub-lever is only integrally fixed to the inner side end, the inner side sub-lever is omitted and the inner side lock plate 24-I is released to the inner side of the release lever. It may be directly connected to the end.

However, the inner side end 16 of the release lever is
By fixing the inner sub-lever 34-I to bI, it becomes easy to perform the projecting work of the engagement pin 42-I,
Since the shape itself of the release lever 16 does not become complicated, the structure is simplified and the work is facilitated.

Although a leaf spring is used as the support spring 43, it is sufficient if the release lever 16 can be biased to the initial position with respect to the outer side sub-lever 34-O and can be held. A spring, a torsion spring or the like may be used as this support spring.

However, the support spring 43 made of a leaf spring is used.
In that case, as in the embodiment of the present invention, it is sufficient to dispose the release lever below the outer side end 16b-O of the release lever with the base end fixed to the outer side sub-lever 34-O. Release lever 16 without complicating the
It is possible to easily secure appropriate bias and holding of the.

In the embodiment of the present invention,
Although the lock plates 24-I, 24-O are illustrated as rotatable arms, it is sufficient if the lock holes 28 can be moved up and down with respect to the runners 18-I, 18-O, so the present invention is not limited to this. For example, the lock plate itself may be provided so as to be movable up and down with respect to the runner.

Further, the lock claw 30 of the upper opening hanging piece 20a of the guide rails 20-I, 20-O can be inserted and engaged in the lock hole 28 restricted by the lock plates 24-I, 24-O. The locking means 12-I and 12-O are embodied as described above, but the invention is not limited to this.For example, the lock claws of the lock plate may be inserted into a series of lock holes formed in the bottom wall of the guide rail, It may be configured to be inserted and engaged while being lowered.

The lock hole 28 and the lock claw in the figure
The number and shape of 30 are merely examples, and the lock holes and lock claws are inserted into and engaged with each other by the runners 18-I, 18-O for the guide rails 20-I, 20-O. The number and shape are not limited to those shown in the drawings, because it is sufficient to control the slides of the.

Since the seat slide device 10 shown in the embodiment of the present invention further secures the lock-on of the inner side locking means 12-I, a belt anchor is provided on the inner side runner 18-I. The present invention is suitable for a seat slide device mounted on a front seat of an automobile. However, by ensuring the lock-on with one of the lock means, the incomplete lock-on, that is, the so-called half-lock state can be surely prevented, so that it is suitable for various passengers such as a rear seat of a car, a train, an airplane, and a ship. It is needless to say that even if the present invention is applied to a seat or the like, effects such as ensuring safety of a seated person and facilitating wearing can be sufficiently ensured.

The above-described embodiments are for explaining the present invention, and are not intended to limit the present invention in any way, and all modifications and alterations made within the technical scope of the present invention are also included in this embodiment. Needless to say, it is included in the invention.

[0063]

As described above, according to the locking structure of the seat slide device of the present invention, the outer side end of the release lever moves in the direction in which the outer side sub-lever coincides with the lock-on direction of the release lever. Since it is rotatable, the release lever is rotated against the biasing force of the support spring at the outer end with respect to the forward tilt of the inner runner. That is, even if a load in the forward tilt direction is applied to the inner runner, the release lever is rotated following it, so that the influence of the forward tilt of the inner runner on the inner lock plate is reliably suppressed.

Therefore, according to the present invention, the lock-on holding property at the time of a frontal collision is further enhanced.

Since the lock-on retaining property is sufficiently enhanced without the need for strengthening the guide rail mounting strength on the inner side, the runner, and the guide rail rigidity, etc., the structure is complicated and the inner rail is It is possible to reliably prevent the body from increasing in size and weight. Further, since members can be shared between the inner and outer rail bodies, the cost can be reduced.

Further, since the outer side end of the release lever and the outer side sub-lever are rotatably connected and supported, the inner and the outer are secured under the rotation or the clearance for ensuring the rotation. The positional deviation between the rail bodies can be sufficiently absorbed. That is, since the positional deviation between the inner and outer rail bodies does not directly affect the operation of the inner-side and outer-side locking means, the mounting accuracy of each rail body can be sufficiently relaxed, and at the time of mounting, The work using a jig etc. can be omitted.

Therefore, the workability at the time of mounting the seat slide device can be sufficiently improved by simplifying the mounting work.

Further, in the present invention, the lock-on of the inner side locking means is prioritized, and the phenomenon of locking on only the outer side locking means is eliminated. In addition to the retention, it is further enhanced.

Since it suffices to raise and lower the inner side and outer side lock plates with a minimum stroke for obtaining lock-on and lock-off between the lock claw and the lock hole, it is possible to suppress the cross-sectional height of the guide rail. In addition, the guide rail and the rail body can be downsized, and the cost can be sufficiently reduced.

[0070]

Further, if the inner side sub-lever is fixed to the inner side end of the release lever, the work of projecting the engaging pin and the like can be facilitated, and the shape of the release lever does not become complicated, so that the structure is simplified. In addition, the work can be facilitated.

[Brief description of drawings]

FIG. 1 is a schematic exploded perspective view of a seat slide device showing a lock structure of a seat slide device according to the present invention.

FIG. 2 is a schematic front view of the inner side rail body in a partially cutaway state when the locking means is in an initial state (lock-on state).

FIG. 3 is a partially cutaway schematic front view of the outer rail body in the initial state (lock-on state) of the locking means.

FIG. 4 is a schematic front view of the inner-side and outer-side locking means partially broken away showing the preceding lock-off state of the outer-side locking means.

FIG. 5 is a partially cutaway schematic front view of the inner side and outer side locking means showing a lock-off state of the inner side and outer side locking means.

[Explanation of symbols]

10 Seat slide device 12-I, 12-O Locking means 14-I, 14-O rail body 16 Release lever 18-I, 18-O runner 24-I, 24-O lock plate 34-I, 34-O sub lever 43 Support spring

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B60N 2/06-2/08

Claims (2)

(57) [Claims] 1. Locking means for exhibiting lock-on and lock-off operations by a lifting operation of a lock plate on a runner side to a pair of inner and outer rail bodies in which a runner is slidably assembled to a fixed guide rail. However, in a double-sided lock type seat slide device that is provided so as to be synchronously operated under the operation of a release lever, a release lever having a substantially U-shaped plane is erected and pivotally mounted between the inner and outer runners. The inner side end of the release lever is
While it is linked to the inner lock plate via an integral inner engagement pin, a separate sub-lever is provided at least at the outer side end of the release lever, and the outer side end of the release lever is Is rotatably connected to and supported by the outer side sub-lever only in a direction corresponding to the lock-on direction of the release lever, and is elastically biased to a predetermined initial position with respect to the outer side sub-lever by a support spring.
A cam that is held and is capable of pressing the outer side lock plate in the lock-off direction is rotatably provided on the outer side runner, and through the outer side engagement pin projecting on the outer side sub-lever, The inner lock plate is connected to the sub-lever so that the inner lock plate is directly controlled by the release lever, while the outer lock plate is rotated by this cam in conjunction with the operation of the release lever. A lock structure for a seat slide device, characterized in that its operation is controlled so as to maintain its state from lock-off preceding the lock plate and lock-on delayed to the inner lock plate. 2. A separate sub-lever is provided at each of the inner side end and the outer side end of the release lever, and the inner side end is
2. The inner side sub-lever is integrally fixed, whereas the outer side end is rotatably connected to and supported by the outer side sub-lever only in a direction coinciding with the lock-on direction of the release lever. Lock structure for seat slide device.