JPH0114503Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a seat track for adjusting the position of a seat such as a vehicle seat in the longitudinal direction, and particularly relates to a lock mechanism included in the seat track.

(Prior Art) In general, this type of seat track has a lower rail fixed to the floor surface and extending in the front-rear direction, an upper rail that is attached to the lower rail so as to be slidable in the front-rear direction and supports the seat, and a space between these two rails. It is provided with a pair of front and rear rollers that are rotatably interposed to smoothly slide the upper rail, and a lock mechanism that is provided between the two rails and releasably locks them. Further, in this type of seat truck, as shown in FIGS. 8 and 9, for example, the lock mechanism 1 is fixed to the outside of the lower rail 2a and the upper rail 2b, and all the constituent members of the lock mechanism 1 are attached to both rails 2a. , 2b.

(Purpose of the invention) The present invention was made with attention to the above-mentioned actual situation, and its main purpose is to create a structure in which the locking mechanism of this type of seat track can be assembled into the space within both rails. The object of the present invention is to effectively utilize the space to minimize the outward protrusion of the locking mechanism from the outside of both rails.

(Structure of the invention) In order to achieve the above object, the present invention provides a locking mechanism for this type of seat track, which includes an actuation plate of a predetermined length extending in the front and back direction between the two rollers in the lower rail, and a locking mechanism of this type of seat track. a pair of front and rear flexible support plates elastically supporting the actuating plate at both ends thereof, spaced apart from the bottom of the lower rail by a predetermined height, and abutting the outer peripheries of both the rollers, respectively; It is rotatably attached to either one via a spring member and presses the operating plate from above to bend both plates so that their tips are interposed between the lower rail and the roller to rotate the roller. an operating lever that restricts the movement of the actuating plate and brings the actuating plate into contact with the bottom of the lower rail; and an operating lever that is provided between the actuating plate and the bottom of the lower rail and engages when the actuating plate abuts the bottom of the lower rail. Its feature lies in that it is constructed with engagement means that restricts the movement of the actuating plate in the front and back direction in multiple stages.

(Operations and effects of the invention) As a result, in the present invention, when the operating lever is rotated against the spring member and the pressure on the actuation plate from above is removed, the actuation plate is moved upward by the action of both support plates. It is pushed up and separated from the bottom of the lower rail by a predetermined height. Therefore, the engagement of the engagement means is released, and the tips of both support plates are separated from between the lower rail and the roller, allowing the roller to roll. As a result, the position of the seat in the longitudinal direction can be adjusted by moving the upper rail together with the operating plate relative to the lower rail. Furthermore, when the rotation of the operating lever is released after adjusting the position of the seat, the operating plate is pressed by the operating lever and comes into contact with the bottom of the lower rail, and its movement in the longitudinal direction is restricted by the engagement means, and each support plate The tip of the roller is interposed between the lower rail and each roller to restrict the rolling of each roller. As a result, the upper rail is locked to the lower rail.

Therefore, in the present invention, the position of the seat in the longitudinal direction can be adjusted without any problem, and most of the components of the locking mechanism can be placed in the space within both rails, and each of these components can be accessed from the outside of both rails. The protrusion in the direction can be reduced.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings. FIGS. 1 and 2 show a seat truck equipped with a locking mechanism according to the present invention.

The seat track T1 supports a seat (not shown) via the lower arm A, and is shown in FIGS.
As shown in the figure, lower rail 11, upper rail 1
2. A pair of rollers 13a, 13b and a locking mechanism 20 according to the present invention are provided. lower rail 1
1 is fixed to the floor surface of the passenger compartment and extends in the front-rear direction, and an upper rail 12 is fitted on the outside of the lower rail 11 and is assembled above the lower rail 11 so as to be slidable in the front-rear direction. A pair of rollers 13a and 13b are interposed between these rails 11 and 12. Each roller 13a, 13b is connected to each roller guide 1.
4a, 14b so as to be able to roll, and when the upper rail 12 slides, it rolls and moves integrally with each roller guide 14a, 14b in the sliding direction of the upper rail 12. As shown in FIGS. 3 and 4, a pair of left and right balls 15a1, 15a2 and 15b1, 15b2 are attached to each roller guide 13a, 13b to ensure smooth movement of each roller guide 13a, 13b. It is planned.

The lock mechanism 20 includes an actuation plate 21 made of resin, a pair of support plates 22 and 23 fixed to both ends of the actuation plate 21, and an operation lever 2.
4 and an engagement pin 25 forming an engagement means are the main constituent members.

Each of the support plates 22 and 23 is formed by bending a plate spring member downward in a curved shape, and its main body is the legs 22a and 23a of the actuation plate 21, and the legs 22a and 23a are substantially the same as the legs 22a and 23a. The central portion is provided with raised protrusions 22b and 23b. The operating plate 21 and supporting plates 22 and 23 integral therewith are disposed between both rollers 13a and 13b in the lower rail 11, and are pressed by an operating lever 24 to be described later.
As shown in the figure, it is in contact with the bottom of the lower rail 11. Therefore, each of the support plates 22 and 23 has a spring force sufficient to bend downward in response to the pressing force of the operating lever 24 and come into contact with the bottom of the lower rail 11. Legs 22a, 2 of each support plate 22, 23
When the tips of the legs 3a are interposed between the rollers 13a, 13b and the lower rail 11, and the pressing force from the operating lever 24 is released and the legs 22a float to the state shown by the two-dot chain lines in FIGS. 2 and 5, each leg 22a ,23a
The tip of each roller 13a, 13b and lower rail 11
Each support plate 22,
23 protrusions 22b, 23b are attached to each roller 13a, 1
It comes into contact with the outer periphery of 3b.

The operating lever 24 is rotatably assembled to a bracket 16 fixed to the outside of the upper rail 12 via a torsion spring 26, faces into the lower rail 11 through openings A1 and A2 of the lower arm A, and is attached to the torsion spring 26. The actuating plate 21 is constantly pressed downward by the torsional force. This pressing force is set to be larger than the spring force of each support plate 22, 23 by a predetermined amount, and the operating plate 2
1 and both support plates 22 and 23 are in contact with the bottom of the lower rail 11. In this example,
The operating lever 24 is connected via an equalizing wire W to a seat track handle H1 provided on the other seat track T2 which is disposed parallel to the seat track T1 and supports the same seat, and is connected via an equalizing wire W to a seat track handle H1 provided on the other side of the seat track T2, which is arranged parallel to the seat track T1 and supports the same seat. Operation lever 2
4 to release the pressure on the actuating plate 21.

The engagement means includes a plurality of engagement recesses 21a provided in the bottom surface of the actuating plate 21 in the longitudinal direction and the lower rail 11.
It is configured by an engaging pin 25 protruding from the bottom of the holder. This engagement pin 25 is connected to the actuating plate 21.
It engages with any one of the engagement recesses 21a, and restricts movement of the actuating plate 21 when engaged with the engagement recess 21a.

In the lock mechanism 20 configured in this way,
When the handle H1 is not operated, the operation lever 24 presses the actuation plate 21 to bring the actuation plate 21 and both support plates 22, 23 into contact with the bottom of the lower rail 11 as shown in FIGS. 2 and 5. . For this reason, the actuating plate 21 has the engaging recess 21
The movement in the front-rear direction is restricted by engagement between one of the support plates 22 and 23 and the engagement pin 25, and the tips of the leg portions 22a and 23a of each of the support plates 22 and 23 are interposed between each of the rollers 13a and 13b and the lower rail 11. ing. Therefore, when attempting to move the upper rail 12 that is integrated with the seat in the front-rear direction when the handle H1 is not operated, the tip of one of the leg portions 22a, 23a of each support plate 22, 23 will touch each roller 13a, 13b. The rollers 13a and 13b are pressed into contact with the upper rail 12, and their rolling is restricted. As a result, the movement of the upper rail 12 in the longitudinal direction is regulated together with the movement of the actuating plate 21 in the longitudinal direction, and the upper rail 12 is in a locked state with respect to the lower rail 11.

On the other hand, when the handle H1 is rotated, the actuating plate 21 rotates against the torsion spring 26, and the pressing force on the actuating plate 21 is released. As a result, the actuating plate 21 is moved as shown in FIGS. 2 and 5 by the spring force of both support plates 22 and 23.
It floats to the state shown by the two-dot chain line in the figure and separates from the bottom of the lower rail 11. Therefore, the engagement recess 21a of the actuation plate 21 and the engagement pin 25 are disengaged, and the tips of the legs 22a, 23a of the support plates 22, 23 are removed from between the rollers 13a, 13b and the lower rail 11. As it escapes, each protrusion 2
2b, 23b abut on the outer periphery of each roller 13a, 13b. As a result, the actuating plate 21 becomes movable in the front and back direction, and both rollers 13a, 13
Since b can roll, the upper rail 12 is unlocked from the lower rail 11 and can move in the front-rear direction. When the upper rail 12 is moved, both rollers 13a and 13b roll to move both roller guides 14a and 14b and the operating plate 21 in the same direction. This makes it possible to adjust the position of the seat in the longitudinal direction, and when the handle H1 is returned to its original position after adjusting the position, the operating lever 24
returns and presses the operating plate 21, causing the operating plate 21 and both support plates 22, 23 to come into contact with the bottom of the lower rail 11 again. Therefore, the upper rail 12 is locked to the lower rail 11 again.

In this way, in the lock mechanism 20 according to this embodiment, all the other structural members 21 to 25 are attached to both rails 11 and 12, except for a part of the operating lever 24 and the torsion spring 26 that supports it. Therefore, it is possible to effectively utilize the space within both rails 11 and 12 and prevent the rails 11 and 12 from protruding significantly outward from the outside.

(Modification) In the above embodiment, the actuation plate and both support plates are formed by integrating support plates 22 and 23 made of leaf spring members at both ends of the actuation plate 21 made of resin. However, in the present invention, instead of this, as shown in FIG. 6, a plate 21A in which the actuating plate and both support plates are integrally formed by a plate spring member or the like can be adopted.

Further, in the present invention, as shown in FIG. 7, the operating lever 24A may be fixed to the handle H2 and rotated directly by the handle H2.

In the above embodiments and modifications, the operating levers 24, 24A are rotated by the handles H1, H2, but in the present invention, the operating levers may be rotated directly by hand. good.

[Brief explanation of drawings]

Fig. 1 is an outside perspective view of a seat track equipped with a locking mechanism according to the present invention, Fig. 2 is an enlarged partial vertical sectional side view of the seat track seen from the inside, and Fig. 3 is an exploded perspective view of the seat track. Figure 4 is the second
An enlarged sectional view taken along the - line in the figure, Figure 5 is the same -
6 is a perspective view showing a modified example of the plate, FIG. 7 is a perspective view showing a modified example of the seat track, FIG. 8 is a partial perspective view of a conventional seat track, and FIG. 9 is a perspective view showing a modified example of the plate. is the − of the same seat track.
It is a sectional view along a line. Explanation of symbols, T1, T2... seat track,
11...Lower rail, 12...Atsupa rail, 1
3a, 13b...Roller, 20...Lock mechanism,
21... Actuation plate, 21a... Engagement recess, 2
2, 23...Support plate, 24...Operation lever, 25...Engagement pin, 26...Torsion spring.

Claims (1)

[Scope of utility model registration request] A lower rail fixed to the floor surface and extending in the front-rear direction, an upper rail that is attached to the lower rail so as to be slidable in the front-rear direction and supports the seat, and an upper rail that is rotatably interposed between these two rails and supports the upper rail. A pair of front and rear rollers that slide smoothly,
In the seat track, the lock mechanism is provided between the two rails and releasably locks the two rails, and the lock mechanism is provided with an actuation plate of a predetermined length extending in the front and back direction between the two rollers in the lower rail. and a pair of front and rear flexible support plates elastically supporting the actuating plate at both ends of the actuating plate, spaced apart from the bottom of the lower rail by a predetermined height, and abutting the outer peripheries of the rollers, respectively. and is rotatably assembled to either one of the rails via a spring member and presses the operating plate from above to bend the plates so that their tips are interposed between the lower rail and the roller. an operating lever for controlling the rolling of the roller and bringing the actuating plate into contact with the bottom of the lower rail; and an operating lever provided between the bottom of the actuating plate and the lower rail so that the actuating plate comes into contact with the bottom of the lower rail. A locking mechanism for a seat track, comprising an engaging means that engages when the actuating plate is moved in a plurality of stages to restrict the movement of the actuating plate in the longitudinal direction.