JP5366283B2 - Slide structure for vehicle seat and vehicle seat having the slide structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide slide structure for a vehicular seat capable of adjusting a seat position in the back and forth direction and the height direction of the vehicle, and capable of reducing the weight of the slide structure for a vehicular seat, and to provide a vehicular seat having the slide structure. <P>SOLUTION: The slide structure for the vehicular seat includes: a fixed inside rail fixed to a vehicle floor and extended in the back and forth direction of the vehicle; and a movable outside rail externally fitted on the fixed inside rail over the back and forth direction of the vehicle freely to slide in the back and forth direction of the vehicle with the fixed inside rail. In the slide structure for a vehicular seat, the movable outside rail is fixed to a cushion seat through a cushion seat height adjusting mechanism. The movable outside rail and the fixed inside rail have vertically long cross sectional shapes in the height direction of the vehicle, and include side surfaces extending in the back and forth direction of the vehicle and arranged along the height direction of the vehicle. The side surface is formed with the cushion seat height adjusting mechanism and/or an occupant belt anchor fitting surface. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

The present invention relates to a vehicle seat slide structure and a vehicle seat having the slide structure. More specifically, the vehicle position can be adjusted in the vehicle longitudinal direction and the height direction with a simple structure, and the vehicle seat is provided. The present invention relates to a slide structure for a vehicle seat that can achieve the reduction in weight of the slide structure, and a vehicle seat having the slide structure.

Conventionally, a slide structure for a vehicle seat has been used for adjusting the position of the vehicle in the front-rear direction and the height direction in the vehicle seat.
The vehicle seat slide structure is fixed to the vehicle floor, and is fixed to the fixed inner rail extending in the front-rear direction of the vehicle, and fitted to the fixed inner rail in the front-rear direction of the vehicle. The movable outer rail is slidable in the longitudinal direction of the vehicle, and the movable outer rail is fixed to the cushion seat via a cushion seat height adjusting mechanism.

According to such a configuration, when adjusting the position of the cushion seat, the movable outer rail is moved in a sliding form in the vehicle front-rear direction with respect to the fixed inner rail, thereby fixing the cushion seat to the movable outer rail. While the vehicle seat front / rear direction position can be adjusted, the cushion seat height adjustment mechanism moves the cushion seat relative to the movable outer rail in the vehicle height direction, thereby increasing the vehicle height of the cushion seat. It is possible to adjust the position in the vertical direction.
However, such a conventional vehicle seat slide structure has the following technical problems.

First, the vertical cross-sectional shape of the rail structure that is roughly composed of the fixed inner rail and the movable outer rail is a so-called laterally long cross section, so that a belt load is applied during the front or rear collision of the vehicle. Thus, the strength efficiency is poor against the impact load applied to the slide structure.
More specifically, as shown in FIG. 13, conventionally, the side portion 600 extending in the front-rear direction of the vehicle included in each of the fixed inner rail and the movable outer rail has been installed horizontally and horizontally. Therefore, the section modulus of the rail structure against the moment load centered on the neutral line in the width direction of the vehicle in the vertical section of the rail structure, which is loaded at the time of the front collision or rear collision of the vehicle, is the length in the vehicle height direction. In such a horizontally long cross-sectional shape, it is difficult to secure the length in the vehicle height direction, and in order to compensate for this, the rail structure itself is made thicker and the like slide structure The increase in weight was incurred.

Secondly, similar to the first technical problem, the vertical cross-sectional shape of the rail structure roughly composed of the fixed inner rail and the movable outer rail is a so-called horizontally long cross section, In order to fix the height adjustment mechanism and / or the occupant belt anchor to the rail structure, a separate mounting bracket is required, which increases the weight of the slide structure and increases the complexity of the structure.
More specifically, as shown in FIG. 13, each of the front link 604 and the rear link 606 constituting the parallel link of the cushion seat height adjusting mechanism with respect to the side surface portion of the horizontal laterally fixed inner rail is a vertical surface. In order to achieve movement within, the pins at the end of each link extend in the horizontal direction and require vertical surfaces to secure the pins. Needed a mounting bracket with. Similarly, mounting brackets are required to fix the occupant belt anchor to the side surface of the fixed inner rail.

In view of the above technical problems, an object of the present invention is to enable the seat position adjustment in the vehicle front-rear direction and the height direction with a simple structure and to achieve weight reduction of the slide structure of the vehicle seat. An object of the present invention is to provide a vehicular seat slide structure and a vehicular seat including the slide structure.
An object of the present invention is to provide a vehicle seat slide structure capable of ensuring a sufficient strength or rigidity against a seat side load and a belt input load while achieving a reduction in weight of the vehicle seat slide structure, and It is providing the vehicle seat provided with this slide structure.

In order to achieve the above object, a vehicle seat slide structure according to the present invention includes:
A fixed inner rail fixed to the vehicle floor and extending in the longitudinal direction of the vehicle;
A movable outer rail that is fitted over the fixed inner rail in the front-rear direction of the vehicle and is slidable in the front-rear direction of the vehicle with respect to the fixed inner rail;
The movable outer rail is a vehicle seat slide structure that is fixed to the cushion seat via a cushion seat height adjusting mechanism.
Each of the movable outer rail and the fixed inner rail has a vertically long cross-sectional shape in the height direction of the vehicle, includes a side portion extending in the front-rear direction of the vehicle and along the height direction of the vehicle,
The side surface portion is configured to form a cushion seat height adjusting mechanism and / or an occupant belt anchor attachment surface.

According to the vehicle seat slide structure having the above-described configuration, when adjusting the position of the cushion seat, the movable outer rail is moved in a sliding manner in the vehicle front-rear direction with respect to the fixed inner rail. While it is possible to adjust the position of the cushion seat fixed to the rail in the longitudinal direction of the vehicle, the cushion seat is moved in the height direction of the vehicle relative to the movable outer rail by the height adjustment mechanism of the cushion seat. Thus, the position of the cushion seat in the vehicle height direction can be adjusted.
At this time, each of the movable outer rail and the fixed inner rail has a vertically long cross-sectional shape in the vehicle height direction, instead of a horizontally long cross-sectional shape in the vehicle height direction as in the prior art. A side surface portion extending in the direction and extending in the height direction of the vehicle is provided.

As a result, firstly, in the case of a frontal or rearward collision of the vehicle, the section coefficient of the rail structure with respect to the moment load centered on the neutral line in the width direction of the vehicle in the vertical section of the rail structure is the vehicle height direction. It is possible to secure this length in the vehicle height direction, which is the main dominating factor, thereby effectively preventing an increase in weight such as an increase in the thickness of the slide structure. It is possible to ensure strength.
Secondly, by using this side surface portion as a cushion seat height adjustment mechanism and / or a passenger belt anchor mounting surface, the cushion seat height adjustment required for the horizontally long cross-sectional shape as in the prior art is required. Without using the mechanism mounting bracket and / or the occupant belt anchor mounting bracket, the cushion seat height adjustment mechanism and / or the occupant belt anchor can be directly attached to the movable outer rail. It is possible to adjust the seat position in the vehicle front-rear direction and the height direction, and to reduce the weight of the vehicle seat slide structure.

Further, a retainer extending in the vehicle front-rear direction is provided between the fixed inner rail and the movable outer rail in a form that fits outside the fixed inner rail,
The retainer preferably includes a plurality of holding portions for holding a plurality of balls interposed between the fixed inner rail and the movable outer rail, spaced apart from each other in the front-rear direction of the vehicle.
Furthermore, it is preferable that the rails have a pair of rail structures arranged parallel to each other at intervals in the width direction of the vehicle.

In addition, the movable outer rail includes a movable side surface extending in the vehicle front-rear direction along the height direction of the vehicle, a first projecting movable surface projecting from one side edge of the movable side surface, and the other of the movable side surfaces. A substantially U-shaped cross section with a second projecting movable surface projecting from the side edge of
The fixed inner rail includes a fixed side surface extending in the vehicle front-rear direction along the height direction of the vehicle, a first protruding fixed surface protruding from one side edge of the fixed side surface, and the other side edge of the fixed side surface. Having a substantially U-shaped cross section with a second overhanging fixing surface overhanging from
The movable outer rail is externally fitted to the fixed inner rail in a state in which open portions formed by respective U-shaped cross sections are opposed to each other.
The retainer includes a retainer side surface portion extending in the vehicle front-rear direction along the vehicle height direction, and a plurality of first surfaces projecting from one side edge of the retainer side surface portion and spaced apart from each other by a predetermined distance in the vehicle front-rear direction. A substantially U-shaped cross section having a retainer overhanging upper surface, and a plurality of second retainer overhanging surfaces extending from the other side edge of the retainer side surface portion and spaced apart by a predetermined distance in the longitudinal direction of the vehicle;
The retainer is configured such that the plurality of first retainer overhanging surfaces and the first overhanging movable surfaces in a state where the open portions formed by the respective U-shaped cross sections face each other with respect to the movable outer rail. Positioned between the first projecting fixing surface and the plurality of second retainer projecting lower surfaces between the second projecting movable surface and the second projecting fixing surface,
Each of the plurality of first retainer overhanging surfaces and the plurality of second retainer overhanging surfaces has the holding portion for holding a ball,
Thereby, the ball rolls between the first overhanging movable surface and the first overhanging fixed surface, and between the second overhanging movable surface and the second overhanging fixing surface, so that the movable The outer rail and the retainer may be movable in the front-rear direction of the vehicle with respect to the fixed inner rail.

Furthermore, each of the first projecting movable surface and the second projecting movable surface has a first arc-shaped cross-sectional groove extending on the inner surface thereof in the front-rear direction of the vehicle,
Each of the first overhanging fixing surface and the second overhanging fixing surface preferably has a second arcuate cross-sectional groove extending in the front-rear direction of the vehicle on the outer surface thereof.
Furthermore, the movable outer rail may have an upper surface portion and a lower surface portion that protrude from the upper and lower edges of the side surface portion, respectively, and the protruding width of the upper surface portion may be variable in the longitudinal direction of the vehicle.

The holding portion may be a through hole provided in each of the plurality of first retainer overhanging surfaces and each of the plurality of second retainer overhanging surfaces.
Furthermore, the holding part may be a recess provided on each of the side edges of the plurality of first retainer overhanging surfaces and on each of the side edges of the plurality of second retainer overhanging surfaces.

In order to achieve the above object, a vehicle seat according to the present invention includes:
The vehicle seat slide structure according to claim 1, further comprising a cushion seat, a back seat attached to the cushion seat via a recliner, and the cushion seat and the back seat, respectively. The pad frame is provided so as to cover the entire seat frame structure, and the bag-shaped skin provided so as to cover the seat frame structure and the entire pad.

According to the slide structure for a vehicle seat according to the present invention, the rail structure itself has a vertically long cross section, so that it is effective for an impact load applied via a belt at the time of a front collision or rear collision of the vehicle. The strength of the cushion seat can be secured, and the cushion seat height adjustment mechanism and / or the occupant belt anchor can be secured without using the cushion seat height adjustment mechanism mounting bracket and / or the occupant belt anchor mounting bracket. Can be directly attached to the side of the movable outer rail along the height direction of the vehicle, and the seat position in the vehicle longitudinal direction and height direction can be adjusted with a simple structure. Can be achieved.

An embodiment of a vehicle seat slide structure according to the present invention will be described in detail below with reference to the drawings, taking as an example a case of being applied to a front seat of an automobile.

FIG. 1 is a perspective view of a sliding structure for a vehicle seat according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view showing a state in which the movable outer rail is locked to the fixed inner rail in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 3 is a schematic cross-sectional view showing a state in which the movable outer rail is unlocked with respect to the fixed inner rail in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 4 is a schematic side view showing a state in which the retainer is attached to the fixed inner rail in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 5 is a perspective view showing the movable outer rail on the side where the belt buckle is installed in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 6 is a plan view showing the movable outer rail on the side where the belt buckle is installed in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 7 is a diagram illustrating a situation in which the position of the vehicle seat in the vehicle front-rear direction is adjusted by the vehicle seat slide structure according to the embodiment of the present invention. FIG. 8 is a perspective view showing a retainer in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 9 is a partially enlarged detail view of one rail in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 10 is a schematic side view showing a schematic configuration of a vehicle height adjustment mechanism in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 11 is a view similar to FIG. 10 showing a state in which the cushion seat is lifted by the vehicle height adjustment mechanism in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 12 shows the moment acting on the rail on the side on which the belt buckle is installed and the belt load is applied with respect to the fixed inner rail and the movable outer rail in the vehicle seat slide structure according to the embodiment of the present invention. FIG.

As shown in FIG. 1, the vehicle seat slide structure 400 includes a vehicle seat front-rear direction position adjustment mechanism 402, a vehicle seat front-rear direction positioning mechanism 404, and a vehicle seat vehicle height. The position adjustment mechanism 406 in the direction and the positioning mechanism 408 in the vehicle height direction of the vehicle seat are schematically configured.

The vehicle seat is composed of a pair of side frames S extending in the front-rear direction of the vehicle and a front pipe F and a rear pipe R connecting the pair of side frames, and a cushion seat (not shown) fixed to the vehicle. And a back seat (not shown) attached to the cushion seat so as to be tiltable with respect to the cushion seat via a recliner (not shown). 400 is attached to the side frame S of the cushion seat, and the position of the cushion seat as a whole in the vehicle seat including the back seat can be adjusted and positioned in the vehicle longitudinal direction and the vehicle height direction. Adjustment and positioning are possible.
The position adjustment mechanism 402 in the vehicle front-rear direction of the vehicle seat extends in the vehicle front-rear direction, and a pair of rail structures 410 that are spaced apart from each other by a predetermined distance in the vehicle width direction. It is schematically composed of a retainer 412 for enabling movement in the direction.

The vehicle seat slide structure 400 is related to the center line in the longitudinal direction of the vehicle, except that a belt bracket 411 including a belt buckle 438 into which a passenger belt is fitted is attached to one of the pair of rail structures 410. Since they are configured symmetrically, one of them will be described, and the other will be given the same reference number, and the description thereof will be omitted.

Each of the pair of rail structures 410 is made of steel, and includes a fixed inner rail 416 having rail mounting brackets 414A and B fixed to respective end portions in the front-rear direction of the vehicle, and a movable outer rail that is fitted around the fixed inner rail 416. 418. The rail length of each of the fixed inner rail 416 and the movable outer rail 418 is determined so that the fixed inner rail 416 and the movable outer rail 418 are in the rearmost position in consideration of the space on the front floor where the vehicle seat slide structure 400 is installed. What is necessary is just to determine suitably considering the state when it is set to the side position and when it is set to the vehicle frontmost side position.

As shown in FIGS. 2 and 3, the fixed inner rail 416 includes a fixed side surface 420 extending in the vehicle front-rear direction along the height direction of the vehicle, and a first protruding sideways from one side edge of the fixed side surface 420. It has a substantially U-shaped cross section including a first overhanging fixed upper surface 422 and a second overhanging fixed lower surface 424 that projects laterally from the other side edge of the fixed side surface 420. The first overhanging fixed upper surface 422 and the second overhanging fixed lower surface 424 each have a second arcuate cross-sectional groove 426 extending in the front-rear direction of the vehicle on the outer surface thereof. Thus, a guide groove for guiding the ball is formed together with a first arcuate cross-sectional groove 436 provided on the movable outer rail 418 described later. Therefore, the arcuate cross-sectional shape of the groove may be determined from such a viewpoint.
As shown in FIG. 4, the fixed inner rail 416 is provided with a plurality of fixed locking holes 428 that are aligned at intervals in the front-rear direction of the vehicle. The number of the fixed locking holes 428 may be appropriately determined in consideration of the moving range of the movable outer rail 418 that moves in the vehicle front-rear direction with respect to the fixed inner rail 416.

As shown in FIGS. 2 and 3, the movable outer rail 418 is externally fitted to the fixed inner rail 416 with the open portions formed by the respective U-shaped cross sections facing each other. I am doing so. The movable outer rail 418 includes a movable side surface 430 that extends in the vehicle front-rear direction along the vehicle height direction, a first projecting movable upper surface 432 that projects laterally from one side edge of the movable side surface 430, and a movable side surface 430. And a second projecting movable lower surface 434 projecting laterally from the other side edge of the other side edge.
As shown in FIGS. 5 and 6, in the first projecting movable upper surface 432, the projecting width in the vehicle width direction is variable in the vehicle front-rear direction, and in particular the rail mounting bracket on the vehicle rear side with respect to the fixed inner rail 416. In the vicinity of 414B, it has a maximum width and is tapered in the front-rear direction of the vehicle with that as a boundary. As will be described later, when the vehicle is subjected to a side collision, the moment based on the side load associated therewith is maximized in the vicinity of the rail mounting bracket 414B. Thus, the width is secured and the section modulus is increased. In the present embodiment, the second projecting movable lower surface 434 has a projecting width constant in the vehicle front-rear direction, unlike the first projecting movable upper surface 432, due to space limitations. Similar to the movable upper surface 432, it may be variable in the vehicle front-rear direction and may be maximized in the vicinity of the rail mounting bracket 414B.
Each of the first projecting movable upper surface 432 and the second projecting movable lower surface 434 has a first arcuate cross-sectional groove 436 extending on the inner surface thereof in the front-rear direction of the vehicle.

As shown in FIG. 7, the movable outer rail 418 is fixed to the side frame S of the cushion seat via a parallel link mechanism of the position adjustment mechanism 406 of the vehicle height direction of the vehicle seat, which will be described later. In the structure 410, the occupant belt buckle 438 is fixed to one movable outer rail 418 at the vehicle rear side end portion as described above. The movable outer rail 418 is provided with a plurality of movable locking holes 421 that are aligned at the same interval as the interval between the fixed locking holes 428 adjacent in the front-rear direction of the vehicle. In FIG. 2, four movable locking holes 421 are provided in relation to a locking plate 454 described later, but the number is not limited to four, and the movable outer rail 418 is connected to the fixed inner rail 416. It may be less than four as long as it can be securely locked.

Next, the retainer 412 will be described. As shown in FIG. 8, a retainer 412 extending in the vehicle front-rear direction is provided between the fixed inner rail 416 and the movable outer rail 418. The retainer 412 extends from the one side edge of the retainer side surface portion 440 and the retainer side surface portion 440 extending in the front-rear direction of the vehicle along the height direction of the vehicle. One retainer overhanging upper surface 442 and a plurality of second retainer overhanging lower surfaces 444 projecting from the other side edge of the retainer side surface portion 440 and spaced apart from each other in the front-rear direction of the vehicle. More specifically, the retainer side surface portion 440 is provided with a concave portion extending in the front-rear direction of the vehicle and recessed toward the inner surface of the fixed inner rail 416, thereby forming a bow-shaped cross section. Thus, while not being engaged with the movable outer rail 418, while being guided by the first overhanging fixed upper surface 422 and the second overhanging fixed lower surface 424 of the fixed inner rail 416, the movable inner rail 416 is movable in the vehicle longitudinal direction.

As shown in FIG. 8, the retainer side surface portion 440 of the retainer 412 is provided with the elongated opening 441 extending in the vehicle front-rear direction as described above, and the elongated opening 441 includes the vehicle front side edge 443A and the vehicle rear side end. And an edge 443B. The length of the elongated opening 441 in the vehicle front-rear direction may be appropriately determined from the viewpoint of reducing the weight while ensuring sufficient strength of the retainer 412 itself.

  As shown in FIG. 8, the retainer 412 has a plurality of first retainer overhanging upper surfaces 442 in a state where the open portions formed by the respective U-shaped cross sections face each other with respect to the movable outer rail 418. Positioning is performed between the first projecting movable upper surface 432 and the first projecting fixed upper surface 422, and the plurality of second retainer projecting lower surfaces 444 are disposed between the second projecting movable lower surface 434 and the second projecting fixed lower surface 424. Is done.

The plurality of first retainer overhanging upper surfaces 442 and the plurality of second retainer overhanging lower surfaces 444 each have a through hole 447 for holding the ball 445, so that the ball 445 is connected to the first overhanging movable upper surface 432 and the first overhanging upper surface 432. The movable outer rail 418 is moved together with the retainer 412 with respect to the fixed inner rail 416 by rolling between the extended fixed upper surface 422 and between the second extended movable lower surface 434 and the second extended fixed lower surface 424. It is comprised so that it can move to the front-back direction.

As described above, the movable side surface 430, the fixed side surface 420, and the retainer side surface portion 440 are oriented in the direction along the height direction of the vehicle, so that both the fixed inner rail 416 and the movable outer rail 418 are It arrange | positions so that it may become a longitudinally long cross section in the height direction. As a result, the section modulus can be effectively ensured with respect to the moment around the neutral line in the width direction of the vehicle in the vertical section of the rail as compared to the horizontally long section.

Next, as shown in FIGS. 7 and 9, the vehicle seat longitudinal positioning mechanism 404 for the cushion seat includes an operation lever 446, an operation lever support bracket 448, a release rod 450, an operation lever locking spring 452, and a locking tooth. The locking plate 454 includes a locking plate 454 provided with 455, and a locking plate return spring 456. The same number of the locking teeth 455 as the movable locking holes 421 are provided so as to be able to penetrate the movable locking holes 421 and the fixed locking holes 428 at the same interval as the interval between the adjacent movable locking holes 421. is there.
By lifting the operating lever 446 upward against the biasing force of the operating lever locking spring 452, the release rod 450 rotates around the longitudinal direction of the rail in the direction toward the outside of the rail (the direction of the arrow in the figure). Thus, the locking plate 454 attached to the release rod 450 rotates from the locking position to the locking release position against the urging force of the locking plate return spring 456. As a result, the locking teeth 455 penetrating the movable locking hole 421 and the fixed locking hole 428 are removed from both holes, whereby the movable outer rail 418 is moved forward and backward of the vehicle with respect to the fixed inner rail 416. It is possible to move freely in the direction (see FIG. 3).

When the movable outer rail 418 is moved to the target position in the vehicle longitudinal direction, the lifted operation lever 446 is released at that position. As a result, the operating lever 446 is lowered downward by the urging force of the operating lever locking spring 452, whereby the release rod 450 is rotated in the direction toward the inner side of the rail (opposite the direction of the arrow in the figure). The plate 454 is rotated from the lock release position to the lock position by the urging force of the lock plate return spring 456. As a result, the cushion seat can be positioned at a new vehicle longitudinal direction position. (See Figure 24)

A front link 460 and a rear link 462 constituting a parallel link mechanism for pin-coupling between the movable outer rail 418 and the corresponding side frame S of the cushion seat with respect to the position adjustment mechanism 406 in the vehicle height direction of the vehicle seat. The height of the side frame is automatically adjusted by adjusting the angle of the front link 460 or the rear link 462 with respect to the movable outer rail 418.

As shown in FIGS. 10 and 11, with respect to the positioning mechanism 408 of the vehicle seat in the vehicle height direction, the operation lever 470, the pumping brake unit 472 having the pinion gear 471, the sector gear 474, and the connecting bracket 476 are arranged on the side frame side. Is provided. This vehicle seat positioning mechanism 408 in the vehicle height direction is the same as the conventionally used type and will not be described in detail. However, when the operation lever 446 is rotated upward, the pumping brake unit 472 The provided pinion gear 471 rotates and accordingly the sector gear 474 rotates in the direction of the arrow in the drawing, thereby moving the connecting bracket 476 in the direction of the arrow in the drawing, thereby lifting the front link 460, Correspondingly, the rear link 462 follows this, and the height of the side frame S and thus the cushion seat is adjusted, but the pinion gear 471 is configured not to rotate even if a downward force is applied from the cushion seat side. Thus, the cushion sheet is held at the adjusted height.

The operation of the vehicle seat slide structure 400 having the above configuration will be described in detail with reference to the drawings.

When adjusting the position of the vehicle seat in the vehicle front-rear direction, first, the operation lever 446 is lifted, and the movable engagement hole 421 of the movable outer rail 418 and the fixed engagement hole 428 of the fixed inner rail 416 at the current position in the vehicle front-rear direction. On the other hand, the locking teeth 455 of the locking plate 454 passing therethrough are pulled out to release the locking. As a result, as shown in FIG. 3, the movable outer rail 418 can be freely moved in the vehicle front-rear direction with respect to the fixed inner rail 416.

Next, the movable outer rail 418 is moved in the vehicle front-rear direction with respect to the fixed inner rail 416 toward the target position in the vehicle front-rear direction, for example, toward the front of the vehicle. At this time, each ball 445 is held in the through holes 447 of each of the first retainer overhanging upper surface 442 and each of the second retainer overhanging lower surface 444 of the retainer 412, so that each ball 445 is in contact with the first overhanging fixed upper surface 422 and the first overhang. By rolling between the movable upper surface 432 and between the second projecting fixed lower surface 424 and the second projecting movable lower surface 434, the retainer 412 itself also moves in the moving direction of the movable outer rail 418. The movable outer rail 418 can move slidably and smoothly with respect to the fixed inner rail 416.

Next, by lowering the operation lever 446, as shown in FIG. 2, the locking teeth 455 of the locking plate 454 correspond to the movable locking holes 421 of the movable outer rail 418 reaching the target position and this position. The movable outer rail 418 reaching the target position can be locked and fixed to the fixed inner rail 416 by penetrating through the fixed locking hole 428 of the fixed inner rail 416.

As described above, according to the vehicle seat slide structure 400 having the above-described configuration, the movable outer rail 418 is slid in the vehicle front-rear direction with respect to the fixed inner rail 416 when the position of the cushion seat is adjusted. The position of the cushion seat fixed to the movable outer rail 418 in the vehicle longitudinal direction can be adjusted by moving the cushion seat, while the cushion seat is adjusted with respect to the movable outer rail 418 by the height adjustment mechanism of the cushion seat. By moving the vehicle in the vehicle height direction, the position of the cushion seat in the vehicle height direction can be adjusted.

At this time, each of the movable outer rail 418 and the fixed inner rail 416 has a vertically long cross-sectional shape in the vehicle height direction instead of a horizontally long cross-sectional shape in the vehicle height direction as in the prior art. Side portions extending in the front-rear direction and along the height direction of the vehicle.
More specifically, by orienting each of the movable side surface 430 of the movable outer rail 418, the fixed side surface 420 of the fixed inner rail 416, and the retainer side surface portion 440 of the retainer 412 in a direction along the height direction of the vehicle, The rail structure has a vertically long structure that is long in the height direction.

As a result, firstly, in the case of a frontal or rearward collision of the vehicle, the section coefficient of the rail structure with respect to the moment load centered on the neutral line in the width direction of the vehicle in the vertical section of the rail structure is the vehicle height direction. It is possible to secure this length in the vehicle height direction, which is the main dominating factor, thereby effectively preventing an increase in weight such as an increase in the thickness of the slide structure. It is possible to ensure strength.

FIG. 12 is a moment diagram showing moments acting on the vehicle door side, that is, the rail on the outer side in the fixed inner rail 416 and the movable outer rail 418. More specifically, focusing on the moments in the X, Y, and Z-axis directions shown in FIG. 12, how the moments change in the front-rear direction of the vehicle according to the collision mode of the vehicle is shown. In FIG. 12, (A) is a moment in the Y-axis direction acting on the movable outer rail, (B) is a moment in the Y-axis direction acting on the fixed inner rail, and (C) is acting on the movable outer rail. The moment in the Z-axis direction is shown. The solid line indicates the moment due to the rear collision, the one-dot chain line indicates the moment due to the side collision, and the two-dot chain line indicates the moment from the belt anchor.

  As shown in FIG. 12, when the vehicle collides, the movable outer rails of the front link 460 and the rear link 462 constituting the parallel link mechanism, which is a part of the height adjustment mechanism of the vehicle seat, are shown. A side load is applied in the vehicle width direction from the pin coupling portion of the movable side surface 430 of 418. As a result, as shown in FIG. 12C, the Z-axis moment acting on the movable outer rail is intermediate between the front and rear links, in the vicinity of the vehicle rear side rail mounting bracket 414 of the fixed inner rail 416. Have a peak. With respect to the moment in the Z-axis direction, as shown in FIGS. 11 and 12, the projecting width of the first projecting movable upper surface 432 of the movable outer rail 418 is variable in the vehicle front-rear direction, and particularly in the Z-axis direction. By increasing the overhang width at the position where the moment reaches a peak, the overhang width of the first overhanging movable surface as a whole in the vehicle longitudinal direction is adjusted to the increased overhang width on the safe side, thereby increasing the weight of the rail structure. It is possible to effectively ensure strength by dealing locally without incurring any increase in the size. The same applies to the second projecting movable lower surface 434 of the movable outer rail 418.

Secondly, by using this side surface portion as a cushion seat height adjustment mechanism and / or a passenger belt anchor mounting surface, the cushion seat height adjustment required for the horizontally long cross-sectional shape as in the prior art is required. Without using the mechanism mounting bracket and / or the occupant belt anchor mounting bracket, the cushion seat height adjustment mechanism and / or the occupant belt anchor can be directly attached to the movable outer rail. It is possible to adjust the seat position in the vehicle front-rear direction and the height direction, and to reduce the weight of the vehicle seat slide structure.

Although the embodiments of the present invention have been described in detail above, various modifications and variations can be made by those skilled in the art without departing from the scope of the present invention. For example, in the present embodiment, the rail structure 410 has been described as a pair of rail structures 410, but the present invention is not limited thereto, and the single rail structure 410 may have a vertically long cross section. Furthermore, in the present embodiment, the description has been made for the automobile seat, but the present invention is not limited thereto, and the present invention can be applied to general vehicles such as a railway vehicle, a ship, and an airplane. Moreover, when using with respect to the seat of a motor vehicle, it is applicable to both a rear seat and a front seat.

According to the vehicle seat slide structure of the present invention, the rail structure itself has a vertically long cross section, so that it is possible to effectively ensure the strength at the time of frontal or rearward collision of the vehicle, and the cushion seat The height adjustment mechanism and / or the occupant belt anchor can be directly attached to the side surface of the movable outer rail along the vehicle height direction, and the seat position adjustment in the vehicle longitudinal direction and height direction can be performed with a simple structure. At the same time, it has industrial utility in that it is possible to reduce the weight of the sliding structure of the vehicle seat.

It is a perspective view of the slide structure of the vehicle seat which concerns on embodiment of this invention. In the slide structure of the vehicle seat which concerns on embodiment of this invention, it is a schematic sectional drawing which shows the condition where the movable outer rail is latched with respect to the fixed inner rail. FIG. 5 is a schematic cross-sectional view showing a state in which the movable outer rail is unlocked with respect to the fixed inner rail in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 5 is a schematic side view showing a state in which the retainer is attached to the fixed inner rail in the vehicle seat slide structure according to the embodiment of the present invention. In the slide structure of the vehicle seat which concerns on embodiment of this invention, it is a perspective view which shows the movable outer rail of the side by which a belt buckle is installed. In the slide structure of the vehicle seat which concerns on embodiment of this invention, it is a top view which shows the movable outer rail by the side by which a belt buckle is installed. It is a figure which shows the condition which adjusts the position of the vehicle front-back direction of a vehicle seat with the slide structure of the vehicle seat which concerns on embodiment of this invention. In the slide structure of the vehicle seat which concerns on embodiment of this invention, it is a perspective view which shows a retainer. FIG. 3 is a partially enlarged detail view of one rail in the vehicle seat slide structure according to the embodiment of the present invention. 1 is a schematic side view showing a schematic configuration of a vehicle height adjustment mechanism in a vehicle seat slide structure according to an embodiment of the present invention. FIG. 11 is a view similar to FIG. 10 illustrating a state in which the cushion seat is lifted by the vehicle height adjustment mechanism in the vehicle seat slide structure according to the embodiment of the present invention. In the vehicle seat slide structure according to the embodiment of the present invention, a moment diagram showing a moment acting on a rail on which a belt buckle is installed and a belt load is applied, with respect to a fixed inner rail and a movable outer rail. It is. FIG. 6 is a schematic perspective view showing a state in which a vehicle height adjustment mechanism is attached to a rail via a bracket in a conventional vehicle seat slide structure.

Explanation of symbols

S Side frame cushion seat 400 Vehicle seat slide structure 402 Vehicle seat longitudinal position adjustment mechanism 404 Vehicle seat longitudinal position adjustment mechanism 406 Vehicle seat height direction position adjustment mechanism 408 Vehicle seat position adjustment mechanism 408 Vehicle height direction positioning mechanism 410 Pair of rail structures 411 Belt bracket 412 Retainer 414 Rail mounting bracket 416 Fixed inner rail 418 Movable outer rail 419 Retainer lock prevention pin 420 Fixed side surface 421 Movable locking hole 422 First overhanging fixed upper surface 424 Second Overhang fixed lower surface 426 Second arc-shaped cross-sectional groove 428 Fixed locking hole 430 Movable side surface 432 First overhang movable upper surface 434 Second overhang movable lower surface 436 First arc-shaped cross-sectional groove 441 Elongated opening 441
443 Edge 440 Retainer side surface 442 First retainer overhanging upper surface 444 Second retainer overhanging undersurface 445 Ball 447 Through hole 446 Operation lever 448 Operation lever support bracket 450 Release rod 452 Operation lever locking spring 454 Locking plate 455 Locking Teeth 456 Locking plate return spring 460 Front link 462 Rear link 470 Operation lever 472 Pinion gear 474 Sector gear 476 Connection bracket

Claims (8)

A pair of rail structures that are arranged in parallel with each other at an interval in the width direction of the vehicle are configured, and a fixed inner rail that is disposed inside the pair of rail structures and a pair of other rails. A movable outer rail disposed outside the structure;
The fixed inner rail is fixed to the vehicle floor and extends in the front-rear direction of the vehicle,
The movable outer rail is fitted over the fixed inner rail in the vehicle front-rear direction, and is slidable in the vehicle front-rear direction with respect to the fixed inner rail.
The movable outer rail is a vehicle seat slide structure that is fixed to the cushion seat via a cushion seat height adjusting mechanism.
Each of the cushion seats has a pair of side frames extending in the front-rear direction of the vehicle,
The height adjustment mechanism of the cushion seat comprises a parallel link mechanism having a front link and a rear link that are pin-coupled between each of the movable outer rails and the corresponding side frame,
Each of the movable outer rail and the fixed inner rail has a vertically long cross-sectional shape in the height direction of the vehicle, includes a side portion extending in the front-rear direction of the vehicle and along the height direction of the vehicle,
The side structure of the movable outer rail forms a mounting surface for the corresponding front link and the rear link . Between the fixed inner rail and the movable outer rail, a retainer extending in the vehicle front-rear direction is provided in a form that fits outside the fixed inner rail,
2. The retainer according to claim 1, wherein the retainer has a plurality of holding portions for holding a plurality of balls interposed between the fixed inner rail and the movable outer rail, spaced apart from each other in the front-rear direction of the vehicle. The vehicle seat slide structure. The movable outer rail includes a movable side surface extending in the longitudinal direction of the vehicle along a vehicle height direction, a first projecting movable surface projecting from one side edge of the movable side surface, and the other side edge of the movable side surface. Having a substantially U-shaped cross section with a second projecting movable surface projecting from
The fixed inner rail includes a fixed side surface extending in the vehicle front-rear direction along the height direction of the vehicle, a first protruding fixed surface protruding from one side edge of the fixed side surface, and the other side edge of the fixed side surface. Having a substantially U-shaped cross section with a second overhanging fixing surface overhanging from
The movable outer rail is externally fitted to the fixed inner rail in a state in which open portions formed by respective U-shaped cross sections are opposed to each other.
The retainer includes a retainer side surface portion extending in the vehicle front-rear direction along the vehicle height direction, and a plurality of first surfaces projecting from one side edge of the retainer side surface portion and spaced apart from each other by a predetermined distance in the vehicle front-rear direction. A substantially U-shaped cross section having a retainer overhanging upper surface, and a plurality of second retainer overhanging surfaces extending from the other side edge of the retainer side surface portion and spaced apart by a predetermined distance in the longitudinal direction of the vehicle;
The retainer is configured such that the plurality of first retainer overhanging surfaces and the first overhanging movable surfaces in a state where the open portions formed by the respective U-shaped cross sections face each other with respect to the movable outer rail. Positioned between the first projecting fixing surface and the plurality of second retainer projecting lower surfaces between the second projecting movable surface and the second projecting fixing surface,
Each of the plurality of first retainer overhanging surfaces and the plurality of second retainer overhanging surfaces has the holding portion for holding a ball,
Thereby, the ball rolls between the first overhanging movable surface and the first overhanging fixed surface, and between the second overhanging movable surface and the second overhanging fixing surface, so that the movable The slide structure for a vehicle seat according to claim 2, wherein the outer rail is movable in the front-rear direction of the vehicle with respect to the fixed inner rail together with the retainer. Each of the first projecting movable surface and the second projecting movable surface has a first arc-shaped cross-sectional groove extending on the inner surface thereof in the front-rear direction of the vehicle,
4. The vehicle seat slide structure according to claim 3, wherein each of the first overhanging fixing surface and the second overhanging fixing surface has a second arc-shaped cross-sectional groove extending in a front-rear direction of the vehicle on an outer surface thereof. 5. The movable outer rail according to claim 3, wherein the movable outer rail has an upper surface portion and a lower surface portion that protrude from the upper and lower edges of the side surface portion, respectively, and a protruding width of the upper surface portion is variable in the front-rear direction of the vehicle. Slide structure for vehicle seats. The vehicle seat slide structure according to claim 1, further comprising a cushion seat, a back seat attached to the cushion seat via a recliner, and the cushion seat and the back seat, respectively. A vehicle seat comprising: a pad provided so as to cover the entire seat frame structure; and a bag-like skin provided so as to cover the seat frame structure and the entire pad. 5. The vehicle seat slide structure according to claim 3, wherein the holding portion is a through hole provided in each of the plurality of first retainer projecting surfaces and each of the plurality of second retainer projecting surfaces. 6. . 5. The vehicle according to claim 3, wherein the holding portion is a recess provided on each of the side edges of the plurality of first retainer overhanging surfaces and on each of the side edges of the plurality of second retainer overhanging surfaces. Seat slide structure.

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