JP2001113995A - Lock mechanism of seat slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock mechanism applicable for a rail body formed through an extruding work. SOLUTION: A lock plate 28 having a lock claw 28a inserted in and engaged with a series of the lock holes 32 of a guide rail 14 is oscillatorily disposed and supported orthogonally to the rolling direction of a runner 12 and deviated in a lock-on direction under the deviation force of a lock spring 40. A lock off plate 30 with a guide hole 44 inserted in and engaged with the coupling pin 38 of the lock plate 28 is slidably disposed along the rolling direction of a runner 12 and formed as combination of a linear lock part 44a extending along the rolling direction of a runner and a lock off part 44b obliquely extending in which the lock plate is forcedly moved in a lock off direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock mechanism provided in a seat slide device, and more particularly to a seat slide device provided in a rail body comprising a combination of a pair of runners and guide rails formed by extruding a specific material. Related to the lock mechanism.

[0002]

2. Description of the Related Art For example, a multi-row rear seat such as a second seat or a third seat disposed behind a front seat is provided with a seat slide device to form a slide seat that can slide in the front-rear direction.
It is widely used in multipurpose vehicles such as RVs such as cars.

In such a seat slide device mounted on a rear seat, for example, a runner (also referred to as an upper rail) on which a seat is mounted and fixed on a guide rail (also referred to as a lower rail) fixed to a vehicle floor or the like.
Is generally adopted to slidably assemble through a synthetic resin slider or the like.

[0004] As a seat slide device suitable for mounting on such a rear seat, there is provided a so-called long rail type which can secure a long slide range by using a long guide rail (long rail). Have been.

[0005]

Generally, a guide rail and a runner which form a rail of a seat slide device are formed into corresponding shapes by pressing a ferrous material or the like. However, since the specific gravity of iron or the like generally used as these materials is heavy, especially when the guide rail is a long rail, the weight of the entire rail body cannot be avoided.

In recent years, in a long rail type rail body (seat slide device), the guide rails and the runners have been formed from, for example, an aluminum material having a low specific gravity. From the etc., under the roll forming by the so-called extrusion process,
The molding, that is, the molding of the guide rail and the runner is performed.

[0007] In such roll forming by extrusion of an aluminum material or the like, since it is required that the cross-sectional shape of each is substantially constant, particularly when the runner is rolled by extrusion, an iron material or the like is required. A large change from the conventional runner shape consisting of

Here, in the seat slide device,
Usually, a lock mechanism for restricting slide of the runner with respect to the guide rail is provided on the rail body. However, the configuration of the known lock mechanism is based on the premise of assembling to a runner having a non-constant cross-sectional shape, so that it is not easy to apply to a rail body formed by extrusion.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lock mechanism of a seat slide device applicable to a rail body formed by extrusion.

[0010]

According to the present invention, there is provided a lock plate having a lock claw which can be inserted into and engaged with a series of lock holes formed in a side wall of a guide rail. The lock plate is disposed and supported on the runner slidably in the direction perpendicular to the rolling direction of the runner, and the lock plate is biased in the lock-on direction with respect to the lock hole under the biasing force of the lock spring. A lock-off plate with a guide hole to be inserted and engaged with an integral connecting pin protruding from the lock plate is interposed between the pair of side walls of the runner so as to be slidable along the rolling direction of the runner. The guide hole of the lock-off plate is provided with a linear lock portion extending along the rolling direction of the runner and a lock extending obliquely forcibly moving the lock plate in the lock-off direction. It is formed as a combination with the off part.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 and 2, in a lock mechanism 10 of a seat slide device according to the present invention, a pair of runners 12 and a guide rail 14 forming a rail body 11 have a long shape having a constant cross-sectional shape. As a body, a specific material with a low specific gravity,
For example, a lock mechanism is formed as a form suitable for being disposed on the rail body by rolling and forming each by extrusion of an aluminum material.

The runner (also referred to as an upper rail) 12 is formed, for example, in a substantially U-shaped cross section in which side walls 12b are erected in parallel on respective sides of a bottom wall 12a. The rail body 11 is formed by slidably inserting the runner 12 through a predetermined slider 16 inside a guide rail (also referred to as a lower rail) 14 formed into a hollow cross-sectional shape. As shown in FIG. 3, a seat slide device 20 that supports the seat 18 so as to be slidable in the front-rear direction by arranging the rails on the inner side (closer to the center) and the outer side (closer to the outside) of the vehicle. Is composed.

The reference numeral 21 in FIGS. 1 and 2 denotes an engagement of a mounting bracket 22 (see FIG. 3) provided on the seat side.
The strikers are connected to each other, and the strikers are usually fixed to the front and rear positions of the runner 12, respectively, by pressing the fixing pins 24 or the like. And the mounting bracket 22
It is inserted into the guide rail through the opening 14a on the upper surface of the guide rail 14, and is connected and fixed to the striker 21 under the engagement of its own latch or the like (not shown).

As shown in FIGS. 1 and 2, in the embodiment of the present invention, the slider 16 is formed as a substantially rod-like body from a synthetic resin material or the like.
A guide groove 26 having a substantially U-shaped cross section is fitted on a corresponding portion of the linear projection 12c of the guide rail 12b and formed on the side wall 14b of the guide rail.
It is slidably provided inside. In such a configuration,
As the slider 16 slides in the guide groove 26, the runner
12 is slid with respect to the guide rail 14 in the rolling direction, that is, in the longitudinal direction.

In this embodiment, the slider 16 is embodied as a form that can be fitted to the linear projection 12c of the runner side wall 12b. However, the slider is provided between the runner 12 and the guide rail 14. It is sufficient that the slider is slidably provided, and the present invention is not limited to this. The slider may be formed as another configuration.

A rail body 11, which is a combination of a runner 12 and a guide rail 14, usually has a lock mechanism 10 for restricting the slide of the runner with respect to the guide rail.
Is provided. In addition, as can be seen from FIG. 4 in addition to FIGS.
Is a combination of a lock plate 28 slidably disposed in the rolling direction of the runner 12, that is, a direction orthogonal to the longitudinal direction, and a lock-off plate 30 slidably disposed along the longitudinal direction of the runner. Is formed.

The lock plate 28 is a side wall of the guide rail.
Inserted into a series of lock holes 32 drilled in 14b, formed integrally with a lock claw 28a at the tip that can be engaged, for example, insertion into a sliding recess 34 provided at the lower end of the runner, Arrangement and a pair of resin plates 36 made of synthetic resin, etc.
, And is supported so as to be slidable in the direction perpendicular to the longitudinal direction (rolling direction) of the runner 12 and not to fall off.

The lock plate 28 integrally has a connecting pin 38 protruding upward. A substantially bow-shaped lock spring 40 that can apply a biasing force to the lock plate 28 in the lock-on direction, that is, the direction in which the lock claw 28a is inserted into and engaged with the lock hole 32, engages the runner side wall 12b. It is interposed and stretched between the mating groove 42 and the connecting pin 38.

That is, the lock plate 28 is a lock spring.
The lock pawl 28a is biased in the lock-on direction under a biasing force of 40, and the lock pawl 28a separates from the lock hole 32 under sliding of the lock plate against the biasing force of the lock spring, that is, the lock of the lock plate. Off is possible.

The lock-off plate 30 can control the sliding position of the lock plate 28 by inserting and engaging the connecting pin 38 of the lock plate and moving the connecting pin along the periphery thereof. The runner is formed with a guide hole 44 that allows the lock plate to slide in the lock-off direction forcibly, and is inserted between the pair of side walls 12b of the runner, for example, between the guide grooves 46 of the side walls. 12 are slidably disposed along the longitudinal direction.

The lock-off plate 30 is formed integrally with a lock-off bracket 48 projecting upward. Then, the lock-off lever 50 on the seat 18 side
(See FIG. 3) is engaged and connected to the lock-off bracket 48 in an interlockable manner, so that the operation of the lock-off lever, that is, the sliding of the lock-off plate 30 in conjunction with the lock-off operation is ensured. ing.

Here, as can be clearly understood from FIG.
According to the present invention, the guide hole 44 of the lock-off plate has a linear lock portion 44a extending along the longitudinal direction of the runner 12 and an oblique direction forcibly sliding the lock plate 28 in the lock-off direction. It is formed in a substantially rectangular shape in which the extended lock-off portion 44b is continuously combined.

In the embodiment of the present invention,
The guide hole 44 is formed as a form in which a lock-off portion 44b is connected to each end of the lock portion 44a.

For example, it is assumed that the state in which the connecting pin 38 is located at the alignment position of the guide hole with the lock portion 44a shown in FIG. 4 is the initial state of the lock mechanism 10. In this initial state, the lock plate 28 is biased and held in the lock-on direction under the biasing force of the lock spring 40.
Under the insertion and engagement of the lock claw 28a into the lock hole 32, that is, under the lock-on state of the lock plate, the slide of the runner 12 with respect to the guide rail 14 depends on the position of the lock hole into which the lock claw is inserted. Regulated by location.

When the lock-off plate 30 is slid in a predetermined direction, for example, to the left in the drawing under operation of the lock-off lever 50, the periphery of the lock-off portion 44b on the corresponding side of the guide hole 44 is connected. The connecting plate is engaged with the pin 38, and the movement of the connecting pin along this peripheral edge causes the lock plate 28 to move.
5, is forcibly slid and held in the lock-off direction against the biasing force of the lock spring 40, as shown in FIG.

In the lock-off position of the lock plate 28, the lock claw 28a of the lock plate is
Since the runner 12 is separated from the guide rail 14, the slide restriction of the runner 12 with respect to the guide rail 14 is released, and the slide of the runner is ensured.

When the lock-off lever 50 is released after the runner 12, that is, the seat 18 is arbitrarily set before and after the slide with respect to the guide rail 14, the lock-off plate 30 slides. The connection pin 38 moves along the peripheral edge of the lock-off portion 44b of the guide hole, and the slide accompanying the connection pin 38 causes the lock plate 28 to move to the initial state under the biasing force of the lock spring 40. It is biased and held at the same lock-on position.

As described above, in the lock mechanism 10 of the seat slide device of the present invention, the lock plate 28 having the lock claw 28a that can be inserted and engaged with the lock hole 32 of the guide rail is attached to the longitudinal direction of the runner 12. A lock-off plate 30 that is slidably disposed in the orthogonal direction and that slides along the longitudinal direction of the runner.
Is controlled by That is, since it is sufficient to dispose the lock plate 28 and the lock-off plate 30 slidably in the respective directions with respect to the runner 12, the lock mechanism 10 applicable to a runner formed by extrusion processing has a complicated structure. It can be easily secured without accompanying.

In the present invention, the guide hole 44 of the lock-off plate is formed as a combination of a linear lock portion 44a extending in the longitudinal direction of the runner 12 and a lock-off portion 44b extending in an oblique direction. In the locked position of the lock plate 28, the connecting pin 38 of the lock plate is engaged with the peripheral edge of the linear lock portion along the longitudinal direction, so that the lock plate is subjected to an external force in the lock-off direction. However, the sliding of the lock plate in the lock-off direction is reliably prevented under the engagement between the connecting pin and the peripheral edge of the lock portion.

Therefore, according to the lock mechanism 10, the lock-on state can be easily maintained without being affected by the external force, whereby the secure lock-on can be appropriately secured.

In the embodiment of the present invention,
Although the guide hole 44 is formed as a form in which the lock-off portion 44b is continuous with each end of the lock portion 44a, the present invention is not limited to this. It may be.

However, as in this embodiment,
If the lock-off portion 44b is continuous with each end of the lock portion 44a of the guide hole, the lock-off of the lock plate 28 can be obtained even when the lock-off plate 30 slides in any direction. The operability of the lock 50 is improved, and the operation direction of the lock-off lever can be arbitrarily selected according to the seat 18 to be mounted. Therefore, the lock mechanism 10 having high adaptability can be easily secured.

Here, in the embodiment of the present invention, the lock plate provided in the sliding recess 34 of the runner 12 is used.
28 is supported by the resin plate 36, but the lock plate is not limited to this as long as it is slidably disposed in a direction perpendicular to the longitudinal direction of the runner. The lock plate may be loosely inserted and disposed in a correspondingly formed through hole or the like provided in the direction.

However, since the lock plate 28 is usually formed from an iron material or the like, the lock plate 28 slides on the runner 12 under a high frictional resistance generated by the contact between the iron material and the aluminum material. There is no denying that it may be hindered. Therefore, as in this embodiment, the lock plate
If the lock plate 28 is supported by the resin plate 36, the frictional resistance between the lock plate and the resin plate 36 is sufficiently suppressed even if the lock plate 28 is formed of an iron material or the like. It can be secured.

By the way, this kind of rail body 11 is usually
Since it is buried in the floor of the vehicle, as shown in FIG.
A pair of elastic lips that prevent foreign matter from entering through the opening 14a on the upper surface of the guide rail and improve the appearance quality
52 are provided along the rolling direction of the guide rail 14 on each side of the opening so as to cover the upper surface of the opening (see FIG. 4).

Here, as shown in FIGS. 1 and 4, the lock-off bracket 48 and the engaging piece 48a with which the lock-off lever 50 is engaged, if it is strong, are usually provided with the opening 1 of the guide rail.
4a, and thus projecting above the elastic lip 52, the runner 12 slides in the front and rear corresponding directions while the elastic lip is turned up by the engagement piece. Therefore, in this configuration, it is preferable that the engagement piece 48a of the lock-off bracket is formed in a shape having a flat and substantially rectangular guide portion projecting from the center.

It is sufficient that the guide portion of the engagement piece 48a is formed in a predetermined range in the vertical direction including at least the alignment position with the elastic lip 52.

According to such a configuration, the engaging piece 48a of the lock-off bracket contacts the elastic lip 52 with the runner 12 or in conjunction with the operation of the lock-off lever 50, and this elastic lip is guided. Since the elastic lip is rolled up along the surface of the portion, a smooth rolling up of the elastic lip can be easily secured (see FIG. 5). And the engagement piece of the lock-off bracket
Since 48a contacts the elastic lip 52, the elastic lip is not damaged or damaged, and the safety of the elastic lip can be easily ensured.

The locking piece 48a of the lock-off bracket
Is not limited to a substantially rectangular shape as shown in FIG. 4, since it is sufficient that the guide portion has a flat shape or a cross-sectional shape that enables the elastic lip 52 to be smoothly raised. The guide portion may be formed in a shape or the like.

In the embodiment of the present invention,
As a material of the runner 12 and the guide rail 14, an aluminum material is exemplified. However, the material is not limited to the aluminum material, as long as the material has a relatively light specific gravity and a material that can be extruded.
12, the guide rail 14 may be formed.

Further, although the rail structure of the seat slide device of the present invention is effective for application to a seat slide device for a rear seat as a long rail, the present invention is not limited to this. It goes without saying that the present invention may be applied to a device.

The present invention is not limited to seats of automobiles and the like, but may be applied to seat slide devices mounted on seats of trains, airplanes, ships and the like.

The embodiments described above are intended to explain the present invention, and do not limit the present invention in any way, and all modifications and alterations within the technical scope of the present invention are also included in the present invention. It goes without saying that it is included in the invention.

[0045]

As described above, according to the lock mechanism of the seat slide device according to the present invention, it is sufficient to dispose the lock plate and the lock-off plate slidably in the respective directions with respect to the runner. A lock mechanism applicable to a runner formed by extrusion can be easily secured without complicating the configuration.

The guide hole of the lock-off plate is
A linear lock portion extending along the runner rolling direction,
It is formed as a combination with a lock-off portion extending in an oblique direction, and at the lock position of the lock plate,
Since the connecting pin of the lock plate is engaged with the peripheral edge of the linear lock portion along the rolling direction, even if an external force in the lock-off direction acts on the lock plate, the connection pin and the peripheral edge of the lock portion are engaged. Under the circumstances, sliding of the lock plate in the lock-off direction is reliably prevented.

Therefore, according to the lock mechanism, the lock-on state can be easily maintained without being affected by the external force, whereby the secure lock-on can be appropriately secured.

If the lock plate provided in the sliding recess of the runner is supported by a resin plate, the frictional resistance between the lock plate and the resin plate is sufficiently suppressed even if the lock plate is formed from an iron material or the like. Therefore, smooth sliding of the lock plate can be sufficiently ensured.

Further, if the engaging piece of the lock-off bracket provided on the lock-off plate is formed in a shape having a guide part projecting from the center, the surface of the guide part of this engaging piece is formed on the elastic lip. To touch and roll it up,
Smooth lifting of the elastic lip can be easily ensured, and breakage or damage of the elastic lip can be prevented, whereby the safety of the elastic lip can be easily ensured.

[Brief description of the drawings]

FIG. 1 is a schematic exploded perspective view showing a lock mechanism of a seat slide device according to the present invention, partially broken away from a rail body.

FIG. 2 is a front view of a rail body of the seat slide device and a cross-sectional view of a lock mechanism.

FIG. 3 is a schematic perspective view of a seat slide device.

FIG. 4 is a schematic cross-sectional view of a rail body, illustrating a lock mechanism of the seat slide device in a lock-on state.

FIG. 5 is a schematic cross-sectional view of the rail body, showing a lock mechanism of the seat slide device in a lock-off state.

[Explanation of symbols]

 10 Lock mechanism of seat slide device 11 Rail body 12 Runner 14 Guide rail 16 Slider 28 Lock plate 30 Lock-off plate 32 Lock hole 34 Sliding recess 36 Resin plate 38 Connecting pin 40 Lock spring 44 Guide hole 48 Lock-off bracket 48a Engage Piece 52 elastic lip

Claims (3)

[Claims] 1. A guide rail having a hollow cross-sectional shape having an opening on an upper surface, and a runner having a substantially U-shaped cross section having a pair of side walls are respectively roll-formed by extrusion of a specific material, and provided on the runner side. Is a lock mechanism of a seat slide device in which the runner is slidably mounted on the guide rail by inserting the runner into the guide rail via the slider, and a series of lock holes formed in the side wall of the guide rail. A lock plate having a lock claw that can be inserted into and engaged with the runner is disposed and supported on the runner so as to be slidable in a direction orthogonal to the rolling direction of the runner. , Is displaced in the lock-on direction with respect to the lock hole, and the insertion of an integral connection pin protruding from the lock plate,
A lock-off plate with a guide hole to be engaged is interposed and arranged between a pair of side walls of the runner so as to be slidable along the rolling direction of the runner. A lock mechanism of the seat slide device formed as a combination of a linear lock portion extending in the direction and a lock-off portion extending in an oblique direction for forcibly moving the lock plate in the lock-off direction. 2. The seat slide device according to claim 1, wherein a lock plate is inserted and arranged in a slide recess provided in a lower portion of the runner, and the lock plate is supported by a resin plate so as not to fall off and to be slidable. Lock mechanism. 3. A lock-off bracket to which a seat-side lock-off lever is connected is integrally provided with the lock-off plate, and a pair of elastic lips can cover an opening on the upper surface of the guide rail. On each side of the opening, each is arranged along the rolling direction of the guide rail, and the engagement piece of the lock-off bracket to which the lock-off lever is engaged has a guide portion having a projecting shape at the center, 3. The lock mechanism for a seat slide device according to claim 1, wherein the lock mechanism is formed at least at a position aligned with the elastic lip.