JP5366282B2 - Vehicle seat slide structure and vehicle seat having the structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide slide structure for a vehicular seat capable of effectively preventing a fall of a ball provided between a movable outside rail and a fixed inside rail, and to provide a vehicular seat including the same. <P>SOLUTION: This slide structure for a vehicular seat includes the movable outside rail 418, to which a belt buckle for an occupant is to be fixed, and a lock means for locking the movable outside rail 418 on the fixed inside rail 416. Both the fixed inside rail 416 and the movable outside rail 418 are arranged so that a vertically long cross section thereof is arranged in the height direction of the vehicle, and are respectively formed with a guide groove for guiding the ball forward and backward. A reinforcing bracket 500 for the movable outside rail 418 is provided in an end of the movable outside rail on a rear side of the vehicle, and the reinforcing bracket 500 for the movable outside rail 418 is provided with a reinforcing bead for preventing deformation of the movable outside rail in a lower surface thereof. A bracket for preventing deformation of the fixed inside rail is provided in an end of the fixed inside rail on a rear side of the vehicle. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

The present invention relates to a slide structure for a vehicle seat and a vehicle seat having the structure, and more specifically, a ball provided between a movable outer rail and a fixed inner rail when the vehicle has a front collision or a rear collision. TECHNICAL FIELD The present invention relates to a vehicle seat slide structure that can prevent a dropout of the vehicle and a vehicle seat having the structure.

Conventionally, rails arranged in a so-called laterally long cross section have been adopted as rails used in the cushion seat sliding structure.
The conventional sliding structure of the cushion seat will be described. A fixed inner rail fixed to the vehicle floor and extending in the front-rear direction of the vehicle, and fitted on the fixed inner rail, and in the front-rear direction of the vehicle with respect to the fixed inner rail. A movable outer rail that is slidable and is fixed to a cushion seat and has a belt buckle for an occupant fixed at a rear end of the vehicle, and the movable outer rail with respect to the fixed inner rail. The movable outer rail has a movable side surface extending in the front-rear direction of the vehicle, a first projecting movable surface projecting from one edge of the movable side surface, and a movable side rail. The fixed inner rail has a fixed side surface extending in the front-rear direction of the vehicle and one edge of the fixed side surface. The movable outer rail has a substantially U-shaped cross section with a first projecting fixed surface projecting and a second projecting fixed surface projecting from the other edge of the fixed side surface. The open portions formed by the respective U-shaped cross-sections are externally fitted to face each other, and a retainer extending in the vehicle front-rear direction is provided between the fixed inner rail and the movable outer rail, The retainer includes a retainer side surface extending in the front-rear direction of the vehicle, a plurality of first retainer overhang surfaces spaced from the one end of the retainer side surface by a predetermined distance in the front-rear direction of the vehicle, and the other of the retainer side surface portions. The retainer has a substantially U-shaped cross section with a plurality of second retainer projecting surfaces that project from the edge and are spaced apart in the longitudinal direction of the vehicle. A plurality of first retainer overhanging surfaces between the first overhanging movable surface and the first overhanging fixed surface and a plurality of second retainer overhanging surfaces in a state where the open portions formed by the letter-shaped cross section are opposed to each other. Is positioned between the second projecting movable surface and the second projecting fixed surface, and the plurality of first retainer projecting surfaces and the plurality of second retainer projecting surfaces each have an opening for holding the ball. .

According to such a configuration, the movable outer rail is moved to the target position so as to be slidable in the vehicle front-rear direction with respect to the fixed inner rail, and is locked there, whereby the position of the vehicle seat in the vehicle front-rear direction is determined. Can be adjusted. More specifically, the ball rolls between the first projecting movable surface and the first projecting fixed surface and between the second projecting movable surface and the second projecting fixed surface, so that the movable outer rail is retained by the retainer. In addition, the vehicle can move in the front-rear direction of the vehicle with respect to the fixed inner rail.

However, when a pair of rails are employed and the belt buckle is fixed to one rail, the input load of the belt is transmitted to the rail through the belt buckle fixing portion of the one rail at the time of a frontal collision of the vehicle. More specifically, since the belt is bridged obliquely forward from one rail, the load of the vehicle front component, the load of the vehicle upper component, and the load of the vehicle width direction component are loaded on one rail.

In this respect, by orienting the movable side surface of the movable outer rail, the fixed side surface of the fixed inner rail, and the retainer side surface portion of the retainer along the height direction of the vehicle, the rail has a vertically long cross section, thereby It is possible to effectively ensure the section modulus with respect to the moment around the neutral line, and it is possible to effectively ensure the strength while suppressing an increase in the weight of the rail.
However, simply changing the rail cross section from a horizontally long cross section to a vertically long cross section causes the following technical problems.

That is, the ball installed between the fixed inner rail and the movable outer rail falls off, and the slide structure may lose the slide function.
More specifically, at the time of a frontal collision of the vehicle, a rotational force about the vehicle longitudinal direction acts on the rail due to a belt input load, and a torsional moment acts on the rail. Due to this torsional moment, the overhanging portion of the fixed inner rail with the arc-shaped cross-sectional groove on the outer surface is deformed to be flattened, while the overhanging portion of the movable outer rail with the arc-shaped cross-sectional groove on the inner surface is similarly , It deforms to flatten, thereby losing the groove holding the ball and causing the ball to fall off.

In particular, such a situation becomes prominent when the movable outer rail is in the rear most position with respect to the fixed inner rail. More specifically, when the movable outer rail is at the rearmost position of the vehicle, the movable outer rail overhangs from the rear-side bracket of the fixed inner rail toward the rear of the vehicle and is in a cantilever state. The belt input load is applied to the vehicle rearmost position of the movable outer rail in such a cantilever state.
If the sliding structure does not function effectively during the frontal collision of the vehicle, it will take time to rescue the injured occupant, which may be a fatal delay.

In view of the above technical problems, an object of the present invention is provided between a movable outer rail and a fixed inner rail when an impact load is applied to a rail of a sliding structure of a vehicle seat through a belt. An object of the present invention is to provide a vehicular seat slide structure capable of effectively preventing a ball from falling off and a vehicular seat including the 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 externally fitted to the fixed inner rail and is slidable in the vehicle front-rear direction with respect to the fixed inner rail, is fixed to a cushion seat, and is a belt buckle for an occupant at the rear end of the vehicle A movable outer rail that is fixed,
Locking means for locking the movable outer rail with respect to the fixed inner rail in the vehicle front-rear direction;
The movable outer rail includes a movable side surface extending in the longitudinal direction of the vehicle, a first projecting movable surface projecting from one edge of the movable side surface, and a second projecting movable surface projecting from the other edge of the movable side surface. It has a substantially U-shaped cross section with
The fixed inner rail includes a fixed side surface extending in the front-rear direction of the vehicle, a first protruding fixed surface that protrudes from one edge of the fixed side surface, and a second protruding fixed surface that protrudes from the other edge of the fixed side surface. It has a substantially U-shaped cross section with
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.
Furthermore, a retainer extending in the vehicle front-rear direction is provided between the fixed inner rail and the movable outer rail,
The retainer includes a retainer side surface extending in the front-rear direction of the vehicle, a plurality of first retainer overhanging upper surfaces protruding from one edge of the retainer side surface and spaced apart from each other by a predetermined distance in the vehicle front-rear direction, and the retainer side surface A substantially U-shaped cross section provided with a plurality of second retainer overhanging surfaces projecting from the other edge of the vehicle and spaced apart by a predetermined distance in the vehicle front-rear direction,
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,
The plurality of first retainer overhanging surfaces and the plurality of second retainer overhanging surfaces each have a 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 In the slide structure of the vehicle seat, the outer rail is movable in the longitudinal direction of the vehicle with respect to the fixed inner rail together with the retainer.
The movable side surface, the fixed side surface, and the retainer side surface portion are disposed along the height direction of the vehicle, whereby the fixed inner rail movable and the movable outer rail are both vertically elongated in the vehicle height direction. Arranged so that
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 has a second arc-shaped cross-sectional groove extending in the front-rear direction of the vehicle on the outer surface thereof,
A guide groove for guiding the ball in the front-rear direction is formed by the first arc-shaped cross-sectional groove and the second arc-shaped cross-sectional groove,
A movable outer rail reinforcing bracket that is in close contact with a portion corresponding to the first arc-shaped cross-sectional groove and is applied to the portion from the outside is provided at an end of the movable outer rail on the vehicle rear side,
The movable outer rail reinforcing bracket is provided with a reinforcing bead on its lower surface for preventing deformation of the movable outer rail,
The fixed inner rail is provided with the fixed inner rail deformation prevention bracket that is in close contact with the portion corresponding to the second arc-shaped cross-sectional groove and is applied to the portion from the inner side at the end of the fixed inner rail on the vehicle rear side. Yes.

According to the vehicle seat slide structure having the above configuration, when adjusting the position of the vehicle cushion seat in the vehicle longitudinal direction, the movable outer rail is moved in the vehicle longitudinal direction with respect to the fixed inner rail. A ball held by a retainer between the outer rail and the fixed inner rail is movable between the first projecting movable surface of the movable outer rail and the first projecting fixed surface of the fixed inner rail, and the second projecting movable of the movable outer rail. By rolling between the surface and the second overhanging fixed surface of the fixed inner rail, the movable outer rail moves together with the retainer so as to be smoothly slidable in the longitudinal direction of the vehicle with respect to the fixed inner rail.

When the vehicle collides forward with the occupant tightening the belt, when the impact load is applied as a belt input load to the movable outer rail through the belt buckle, the movable side surface of the movable outer rail and the fixed inner rail are fixed. By reorienting the side surface, and thus the retainer side surface portion of the retainer in the direction along the vehicle height direction, and making the vertical cross section of the rail structure roughly constituted by the movable outer rail, the fixed inner rail and the retainer into a so-called vertically long cross-sectional shape, Compared to a laterally long cross-sectional shape with respect to a bending moment load around a neutral line extending in the vehicle width direction in the vertical cross-section of the rail, it is possible to efficiently secure a cross-section coefficient, for example, a rail plate The required strength can be effectively ensured while reducing the thickness and reducing the weight.

At this time, since the belt is bridged obliquely forward from the movable outer rail, a load of the vehicle longitudinal direction component, a load of the vehicle width direction component, and a load of the vehicle height direction component are loaded on the rail. Accordingly, the rail structure is acted on by a rotational moment that rotates the rail about the longitudinal direction of the vehicle in the vertical cross section, and holds the ball, and the first and second projecting movable surfaces of the movable outer rail. Deformation force acts in the direction of flattening the first arcuate cross-sectional groove provided on the first arcuate cross-section groove and the second arcuate cross-sectional groove provided on the second overhanging fixing surface of the fixed inner rail. The second arcuate cross-sectional groove located at the bottom loses the groove, which causes the ball to fall off. In particular, when the movable outer rail is at the rearmost position in the vehicle longitudinal direction with respect to the fixed inner rail, the end of the movable outer rail on the vehicle rear side overhangs from the fixed inner rail, and the so-called cantilever state is obtained. Therefore, this situation is easily triggered.

However, the movable outer rail reinforcing bracket is provided at the end of the movable outer rail on the vehicle rear side with respect to the movable outer rail, and the movable outer rail reinforcing bracket is in close contact with the portion corresponding to the first arc-shaped cross-sectional groove. In addition, since the reinforcing bead for preventing deformation of the movable outer rail is provided at the lower portion thereof, the first arcuate cross section with respect to the deformation force as described above is provided. It is possible to suppress the flattening of the groove. On the other hand, a fixed inner rail deformation prevention bracket is provided at an end of the fixed inner rail on the vehicle rear side. The second arc-shaped cross-sectional groove is flattened against the deforming force as described above because it has a function of being in close contact with the portion corresponding to the two arc-shaped cross-sectional grooves and applying the function to the portion from the inside. From the above, when an impact load is applied to the rail of the slide structure of the vehicle seat, the drop of the ball is prevented by preventing the loss of the first and second arc-shaped cross-section grooves. Can be prevented.

The fixed inner rail is provided with a fixing bracket for fixing to the vehicle floor on each of the vehicle front side and the vehicle rear side,
The movable outer rail reinforcing bracket is provided in a portion that overhangs from the vehicle rear side fixed bracket toward the rear of the vehicle when the movable outer rail is at the rearmost position of the vehicle with respect to the fixed inner rail. Is good.
Further, the rail structure may be a pair of rail structures arranged in parallel to each other at an interval in the width direction of the vehicle.
The movable outer rail reinforcing bracket may be a plate having a substantially U-shaped cross section.

In addition, it is preferable that the fixed inner rail reinforcing bracket has a plate shape, and has a portion applied to the fixed inner rail at each of front and rear end portions of the vehicle.
Further, the fixed inner rail reinforcing bracket may be squeezed together with the fixed inner rail with respect to the fixed bracket for fixing the fixed inner rail to the vehicle floor.
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.
Further, the holding portion 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.

According to the slide structure for a vehicle seat according to the present invention, when the vehicle projects forward or rearward with the occupant tightening the belt, the fixed inner rail extended in the vehicle front-rear direction and the fixed inner side The movable outer rail and the fixed inner rail when a rotational force centered on the vehicle front-rear direction is applied to the movable outer rail that is movable in the vehicle front-rear direction so as to be slidable through the ball rolling. By providing a movable outer rail reinforcing bracket and a fixed inner rail deformation preventing bracket for each of the rails, flattening of the first arc-shaped cross-section groove and the second arc-shaped cross-section groove that holds the ball caused by such rotational force It is possible to effectively prevent the ball from falling off by suppressing the above.

Embodiments of a vehicle seat according to the present invention will be described below in detail with reference to the drawings, taking as an example the case of being applied to a front seat of an automobile.
FIG. 1 is a perspective view of a vehicle seat according to the first embodiment of the present invention. FIG. 2 is a side view of the vehicle seat according to the first embodiment of the present invention. 3 is a cross-sectional view taken along line AA of FIG. FIG. 4 is a detailed view of part A in FIG. FIG. 5 is a cross-sectional view taken along line BB in FIG. FIG. 6 is a schematic perspective view of the vehicle recliner according to the first embodiment of the present invention. FIG. 7 is a side view of the vehicle recliner according to the first embodiment of the present invention. 8 is a cross-sectional view taken along line AA in FIG. FIG. 9 is a schematic exploded perspective view of the vehicle recliner according to the first embodiment of the present invention. FIG. 10 is a schematic perspective view of the sliding locking member of the vehicle recliner according to the first embodiment of the present invention. FIG. 11 is a schematic view showing a locked state by the vehicle recliner according to the first embodiment of the present invention. FIG. 12 is a schematic view showing an unlocked state by the vehicle recliner according to the first embodiment of the present invention. FIG. 13 is a perspective view of a vehicle seat slide structure according to an embodiment of the present invention. FIG. 14 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. 15 is a schematic cross-sectional view illustrating a state where 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. 16 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. 17 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. 18 is a longitudinal sectional view of a vehicle longitudinal direction position where a movable outer rail reinforcing bracket is provided in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 19 is a perspective view showing a retainer in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 20 is a partial side view showing an input state of a load to the rail through the belt in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 21 is a perspective view of a reinforcing bracket for the movable outer rail in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 22 is an exploded view around the belt buckle of the movable outer rail in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 23 is a partial perspective view showing a state in which the deformation preventing bracket of the fixed inner rail is attached in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 24 is a partial perspective view showing a deformation preventing bracket of the fixed inner rail in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 25 is a partial side view showing a state in which the deformation preventing bracket of the fixed inner rail is attached in the vehicle seat slide structure according to the embodiment of the present invention. FIG. 26 is a partially enlarged detail view of one rail in the vehicle seat slide structure according to the embodiment of the present invention.

As shown in FIGS. 1 and 2, a vehicle seat 100 according to the present invention is fixed to a passenger compartment floor, and includes a cushion seat frame structure portion 104 having cable stays 102A and B, which will be described later, and a lower end portion 106. A back seat frame structure portion 112, which is connected to the rear end portion 108 of the cushion seat frame structure portion 104 so as to be tiltable and has cable wires 110A and B, which will be described later, a back seat frame structure portion 112, and a cushion seat frame structure A vehicle seat frame structure having a recliner structure part 114 interposed between the parts 104, a pad (not shown) provided to cover the entire vehicle seat frame structure, and the frame structure of the vehicle seat And a bag-shaped skin (not shown) provided so as to cover the entire pad, and a vehicle seat And a slide structure 400 of the vehicle seat which is attached to the frame structure.

The back seat frame structure portion 112 will be described. The back seat frame structure portion 112 has an inverted U-shape as a whole and includes a pair of side frames 118A and 118B extending in the vertical direction and a pair of side frames 118A and 118B. It has an upper frame 120 that spans the upper ends of each.
As shown in FIG. 3, each of the pair of side frames 118 </ b> A and 118 </ b> B has a main side part 122 having a width in the front-rear direction of the vehicle constituting the outer shape, and an overhang rising inward from the front and rear edges of the main side part 122. The flange parts 123A and 123B are formed in a U-shape with an inward cross section.
A flat mat 124 is stretched in an opening formed inside the inverted U-shaped back seat frame structure portion 112, and an upper member 125 that connects upper portions of the pair of side frames 118A and 118B, and a pair of sides. A lower member 127 that connects the lower portions of the frames 118A and 118B is provided, and a headrest (not shown) attachment member 129 is attached to the upper frame 120.

Explaining the oblique wires 110A, B, the oblique wires 110A, B are attached to the main side surface portions 122 of the pair of side frames 118A, B, respectively. Since any of the cable stays 102A and B has the same structure, one of them will be described below.
The upper end of the cable 110 is fixed to the back seat frame structure 112 at the sides of the pair of side frames 118, and the lower end is fixed to the back seat frame structure 112 at the front side of the vehicle from the center of rotation of the back seat frame structure 112. It is stretched. More specifically, the upper end of the cable 110 is provided at a fitting overlap portion 126 between the upper end of the pair of side frames 118 and the upper frame 120, while the lower end of the cable 110 is a recliner structure portion described later. 114 is provided on the bracket portion 65.

In particular, the line connecting the upper end of the cable staying wire 110 and the rotation center of the back seat frame structure portion 112 and the line connecting the lower end of the cable stay wire 110 and the rotation center of the back seat frame structure portion 112 should be as orthogonal as possible. In addition, it is preferable that the cable 110 is positioned.
Pulleys 128A and B are provided on the side portions of the pair of side frames 118 and the bracket portion 65, respectively. The cable 110 is endless and is stretched between the pulleys 128A and 128B.
For example, when the impact load is applied to the vehicle seat 100 at the time of collision, the type and material of the cable 110 can ensure structural soundness while bearing a part of the impact load. Although it is arbitrary as long as it has such strength or rigidity, for example, metallic or CFRP is preferable.

As shown in FIG. 4, the cable 110 is provided with a bolt-nut mechanism 130 corresponding to a wire length adjusting means. More specifically, each end of the cable 110 is provided with a male threaded bolt 132A, B, while a nut 134A, B having a female threaded inward from each end. 136 is provided. By screwing each bolt 132 to the corresponding bore 134, the screwing amount is adjusted, so that the overall length of the wire is reduced in a state where the cable 110 is stretched over the pulleys 128A and 128B. It can be adjusted. According to such a configuration, in order to adjust the length of the wire, it is possible to adjust the length of the wire at two locations using the two bolts 132A and B.
In this case, in a normal state where no load is applied to the vehicle seat, the wire tension may be adjusted so that no tension is generated in the cable 110 and the wire does not loosen, or You may adjust the length of a wire so that it may be in the state in which the tension | tensile_strength generate | occur | produced in the cable 110. FIG. As a modification, a bolt 132 is provided at one end of the cable 110 and a nut 136 is provided at the other end, and the length of the wire can be adjusted by adjusting the screwing amount of the single bolt 132 into the nut 136. Good.
As described above, the configuration in which the endless wire is stretched between the pulleys 128A and 128B is substantially equivalent to the provision of the two oblique wires 110 on each side of the side frame. The bolt-nut mechanism 130 for adjusting the length of the wire can be unified.
It should be noted that such a length adjustment of the cable 110 needs to be performed before the urethane pad is applied to the entire back seat frame structure 112.
With such a cable 110, when a load toward the rear side of the vehicle, for example, an impact load in the event of a collision, is applied to the back seat frame structure 112, the back seat frame structure 112 is applied to the back seat frame structure 112 based on this load. Thus, while exerting a tensile force, it has a characteristic that does not resist a compressive force acting from the outside due to a load on the front side of the vehicle.
Next, referring to FIGS. 1 and 2 again, the cushion seat frame structure portion 104 will be described. The cushion seat frame structure portion 104 includes a pair of side frames 140A and 140B extending in the front-rear direction of the vehicle. The rear frame 141 that connects the rear end portions 108 of the pair of side frames 140A and 140B and the front frame 142 that connects the front ends of the pair of side frames 140A and 140B and are closed by these frames. A cross-sectional structure (box structure) is formed. A cushion spring 143 is provided between the rear frame 140 and the front frame 142 in the opening and closing direction of the vehicle.

As shown in FIG. 5, each of the pair of side frames 140A and 140B has a structure substantially similar to the side frame 118 of the back seat frame structure portion 112, and has a main width that is wide in the vertical direction of the vehicle that forms the outer shape. The side surface portion 144 and the overhanging flange portions 146A and 146B rising inward from the upper and lower edges of the main side surface portion 144 are formed in a U-shape inwardly in cross section.
Explaining the cable stays 102A and 102B, the cable stays 102A and 102B are attached to the side portions of the pair of side frames 140A and 140B, respectively. Since any of the cable stays 102A and B has the same structure, one of them will be described below.
The upper ends of the cable stays 102 are fixed to the cushion seat frame structure 104 at the sides of the pair of side frames 140, and the lower ends are fixed to the cushion seat frame structure 104 at the front side of the vehicle from the center of rotation of the back seat frame structure 112. It is stretched. More specifically, the upper end of the cable 102 is provided on the bracket portion 36 of the recliner structure 114, while the lower end of the cable 102 is provided on the side of the side frame 140.

In particular, a line connecting the upper end of the cable stay 102 and the rotation center of the back seat frame structure 112 and a line connecting the lower end of the cable stay and the rotation center of the back seat frame structure 112 should be as orthogonal as possible. It is preferable to position the cable 102.
Pulleys 147A and B are provided on the side portions of the pair of side frames 140 and the bracket portion 36, respectively, and the cable 102 is endless and is stretched between the pulleys 147A and B.
For example, when the impact load is applied to the vehicle seat 100 in the event of a collision, the type and material of the cable stays 102A and 102B itself bears a part of the impact load while maintaining structural soundness. Although it is arbitrary as long as it has strength or rigidity that can be secured, for example, metallic or CFRP is preferable.
In addition, about the point which has provided wire length adjustment means 145A, B to each cable-stayed wire 102A, B, since it is the same as that of cable-stayed wire 110A, B provided in the back seat frame structure 112, the description Omitted.

Next, the recliner structure portion 114 will be described. As shown in FIG. 6, the recliner 10 includes a frame structure of a back seat on which a driver or an occupant rests and each side surface of a frame structure of a cushion seat on which a driver or an occupant sits. The pair of recliners 10 are connected by connecting shafts 12 extending in the width direction of the seat so that the back seat can be tilted with respect to the cushion seat. . Since the pair of recliners 10 has a similar structure, one of them will be described below.

As shown in FIGS. 7 to 9, the recliner 10 is interposed between the turning arm 14 attached to the back seat B, the base member 16 attached to the cushion seat C, and the turning arm 14 and the base member 16. The cam 18 and a pair of sliding locking members 20 arranged so as to sandwich the cam 18 and an operation lever 22 that rotates the cam 18 are schematically configured, and a pivot 24 fixed to the operation lever 22 is centered. Further, the rotating arm 14 is held so as to be rotatable with respect to the base member 16.
As shown in FIG. 9, the base member 16 is a steel circular plate material, and an insertion hole 26 through which the pivot 24 is inserted is formed at the center thereof, and the size of the insertion hole 26 increases with the rotation of the pivot 24. Thus, the base member 16 is not rotated. The base member 16 is provided with a pair of openings 28 </ b> A, B extending on both sides of the insertion hole 26. Each of the pair of openings 28 </ b> A and 28 </ b> B includes a pair of left and right guide side walls 30 and an arcuate side wall 32 connected to the upper and lower ends of the guide side walls 30. The size of each of the pair of openings 28 is such that a pair of sliding locking members 20 described later slide in the radial direction while being guided along the pair of left and right guide side walls 30 in the pair of openings 28. Is provided to be possible. The diameter of the arc-shaped side wall 32 is set to be the same as the diameter of the circular opening 52 of the rotating arm 14 described later.

On the opposite side of the base member 16 where the rotating arm 14 is located, a base bracket 34 is attached so as to close the pair of openings 28, and an insertion hole 33 through which the pivot 24 is inserted is formed at the center thereof. An attachment portion 36 that is fixed to the frame structure of the cushion seat C is provided below the base bracket 34. The attachment portion 36 is provided with a through hole 39 so that the bolt 37 is inserted into the through hole 39 and the corresponding through hole of the cushion sheet C, and the base bracket 34 and the cushion sheet C are fixed by the welding nut 41. (See FIG. 8).

A plurality of projecting surfaces 11 are provided on one surface of the base member 16, and openings 13 complementary to the projecting surfaces 11 are provided at corresponding positions of the base bracket 34. The base bracket 34 is fixed to the base member 16 by, for example, welding. In the base member 16, a load transmission path is configured between the guide side wall 30 and the sliding locking member 20, so that the plate thickness of the base member 16 is set to have a strength that can withstand such a load. . For example, the plate thickness of the base member 16 is 3.6 mm. On the other hand, the plate thickness of the base bracket 34 is set to be thinner than the plate thickness of the base member 16.

The sliding locking member 20 will be described. A pair of the sliding locking members 20 are provided, and are guided by the pair of left and right guide side walls 30 in the corresponding openings of the pair of openings 28A and 28B of the base member 16, respectively. It is arranged to be able to advance and retreat in the radial direction.
As shown in FIG. 10, each sliding locking member 20 has outer teeth 38 formed on the outer peripheral side thereof, a cam surface 40 formed on the inner peripheral side thereof, and both side surfaces 47 and 49. Are parallel to each other and are in sliding contact with the guide side wall 39.
The cam surface 40 has a protruding engagement portion 42 that protrudes inward and an engagement recess 44 that is connected to the protruding engagement portion 42 and extends outward as in the conventional case. The engaging recess 44 is engaged with the cam 18 described later, whereby the external teeth 38 of each sliding locking member 20 are engaged with internal teeth 54 formed on the rotating arm 14 described later. Between the position and the unlocking position separated from the inner tooth 54, the position is moved so as to be movable forward and backward in the radial direction.
When the base member 16 and the rotating arm 14 are overlapped, the pair of sliding locking members 20 are in a space formed by the circular opening 52 of the rotating arm 14 and the pair of openings 28 of the base member 16. The external teeth 38 provided on each of the pair of sliding locking members 20 can be engaged with the internal teeth 54 provided on the circular opening 52 while being arranged and guided by the guide side walls 30 of the pair of openings 28. Yes.

The cam 18 will be described as shown in FIGS. 11 and 12. The cam 18 is interposed between the pair of sliding locking members 20, and the pivot 24 provided on the operation lever 22 is inserted in the center. A through hole 17 is provided. The size of the through hole 17 is such that the cam 18 is integrally rotated in the direction by the rotation of the pivot 24, so that the cam 18 is rotated by the rotation of the operation lever 22. is there. An opposing surface of each of the pair of sliding locking members 20 of the cam 18 is engaged with a protruding engaging portion 42 that protrudes inward, and is connected to the engaging portion 43 and outward. And an outer shape of the cam 18 is formed point-symmetrically with respect to its center position, and its plate thickness is set slightly thinner than the plate thickness of the rotating arm 14 described later. Unlike the sliding locking member 20, when arranged in the circular opening 52 of the rotating arm 14, it does not reach the pair of openings 28 of the base member 16. Thereby, it is possible to freely rotate within the circular opening 52.

The rotating arm 14 will be described. The rotating arm 14 is made of a steel annular ring, and a circular opening 52 is provided therein. The diameter of the circular opening 52 is the same as the diameter of the arc-shaped side wall 32 of the base member 16. Inner teeth 54 that mesh with the outer teeth 38 of the sliding engagement member 20 are provided on the upper and lower portions of the annular ring constituting the circular opening 52 over a predetermined range of the inner peripheral surface thereof. A load transmission path between the back seat B and the cushion seat C is formed by the engagement of the outer teeth 38 and the inner teeth 54 when the pair of sliding engaging members 20 are moved to the engaging positions. The plate thickness of the steel annular ring is set so that the external teeth 38 have a strength capable of withstanding such a load. The plate thickness of the steel annular ring is, for example, 3.6 mm. The steel annular ring may be formed by punching a circular plate material having a uniform thickness by fine blanking to provide the circular opening 52 to form the external teeth 38.

Four bracket portions 56 to be attached to the back seat B are provided on the outer peripheral portion of the rotating arm 14 at equal angular intervals (90 °) in the outer peripheral direction. Each bracket portion 56 is provided with a through hole 63 for inserting a hold pin 62 described later. The bracket portion 56 may be formed integrally with the annular ring.
On the opposite side of the pivot arm 14 where the base member 16 is located, a lid plate 58 is attached so as to block the circular opening 52, and a through-hole 60 through which the pivot 24 passes is provided at the center of the lid plate 58. It is done. Similar to the cam 18, the size of the through hole 60 is such that the lid plate 58 is integrally rotated in the direction by the rotation of the pivot 24, so that the lid plate 58 is rotated by the rotation of the operation lever 22. Is rotated. The lid plate 58 is a circular thin plate having the same diameter as the annular ring, and the bracket portion 67 is provided at the outer peripheral portion thereof at an equal angular interval (90 °) in the outer peripheral direction, like the rotating arm 14. One is provided. Each bracket portion 67 is provided with a through hole 65 through which a hold pin 62 described later is inserted. As a result, the hold pin 62 is inserted into the through-hole 63 of the rotating arm 14 and the corresponding through-hole 65 of the lid plate 58 and caulked, thereby fixing the lid plate 58 to the rotating arm 14 and rotating. A pair of sliding locking members 20 arranged in the circular opening 52 of the moving arm 14, the cam 18, and a spring 64 described later are held in the circular opening 52. Further, as shown in FIG. 8, the base member 16 is fixed by applying the shoulder portion of the hold pin 62 to the peripheral portion of the base member 16. Since the lid plate 58 only functions as a lid for the circular opening 52 and does not function as a strength member, the thickness of the rotating arm 14 is, for example, 3.6 mm, whereas the lid plate 58 has a lid thickness of 3.6 mm. The plate thickness of the play may be about 0.6 mm.

As shown in FIG. 9, the operation lever 22 is provided on the outer side of one recliner 10, a through hole is provided at one end, and the pivot 24 includes the through hole 33, the base member 16, and the cam 18. The operation lever 22 is fixed by being inserted through the through hole 60 of the lid plate 58. The operation lever 22 is urged to rotate in a certain direction by a pair of springs 64 disposed in the circular opening 52.
On the outside of one recliner 10, a spiral spring 70 is provided adjacent to and substantially parallel to the base bracket 34, one end is fixed to the backsheet B, and the other end is a holder bracket provided on the base bracket 34. By fixing to 72, the back seat | sheet B is urged | biased with respect to the cushion seat | sheet C so that it may rotate in a fixed direction.

Next, as shown in FIG. 13, the vehicle seat slide structure 400 includes a vehicle seat position adjustment mechanism 402 in the vehicle front-rear direction, a vehicle seat position adjustment mechanism 404 in the vehicle front-rear direction, and a vehicle seat position. The position adjustment mechanism 406 in the vehicle height direction and the positioning mechanism 408 in the vehicle height direction of the vehicle seat are schematically configured.

As described above, 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 that connect the pair of side frames, and is a cushion seat fixed to the vehicle. (Not shown) and a back seat (not shown) attached to the cushion seat via a recliner (not shown) so as to be tiltable with respect to the cushion seat. The seat slide structure 400 is attached to the side frame S of the cushion seat, and the vehicle including the back seat can be adjusted and positioned in the vehicle front-rear direction and the vehicle height direction of the cushion seat. It is possible to adjust the position and position of the entire product sheet.
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. 14 and 15, the fixed inner rail 416 includes a fixed side surface 420 extending in the front-rear direction of the vehicle 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. 16, 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. 14 and 15, on the other hand, 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.
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. 17, 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, and a pair of rails 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. 14, 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. 18, 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. 19, 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.

  The retainer 412 has the plurality of first retainer projecting upper surfaces 442 and the first projecting movable upper surface 432 in a state where the open portions formed by the respective U-shaped cross sections are opposed to the movable outer rail 418. The plurality of second retainer projecting lower surfaces 444 are positioned between the first projecting fixed upper surface 422 and the second projecting movable lower surface 434 and the second projecting fixed lower surface 424.

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 is effectively reduced with respect to the moment load around the neutral line in the vehicle width direction of the vertical section of the rail structure composed of the movable outer rail 418, the fixed inner rail 416, and the retainer 412 as compared with the horizontally long section. Can be secured.

As shown in FIGS. 18 and 20 to 22, the movable outer rail reinforcing bracket 500 is provided for the movable outer rail 418 inside the vehicle on which the belt buckle 438 is provided. More specifically, as shown in FIG. 18, the movable outer rail reinforcing bracket 500 is in close contact with the portion corresponding to the first arc-shaped cross-sectional groove 436 of the movable outer rail 418 so as to be applied to the portion from the outside. The movable outer rail 418 is provided at the end of the vehicle rear side.
As shown in FIG. 21, the movable outer rail reinforcing bracket 500 is provided with a reinforcing bead 502 for preventing deformation of the movable outer rail 418 on the lower surface thereof. The movable outer rail reinforcing bracket 500 is a plate having a substantially U-shaped cross section. When the movable outer rail 418 is located at the rearmost position of the vehicle with respect to the fixed inner rail 416, the movable outer rail reinforcing bracket 500 is moved from the vehicle rear side fixed bracket to the vehicle. It is provided in the part that overhangs backward. The plate thickness of the movable outer rail reinforcing bracket 500 is such that when the rotational force that flattens the first arc-shaped cross-section groove 436 is applied to the first arc-shaped cross-section groove 436 from the outside, The first arcuate cross-sectional groove 436 has a thickness effective to prevent the first arc-shaped cross-sectional groove 436 from being flattened against the rotational force.
On the other hand, as shown in FIG. 23 to FIG. 25, the fixed inner rail 416 is in close contact with the portion corresponding to the second arc-shaped cross-sectional groove 426 at the vehicle rear side end, and is fixed to the fixed inner rail. A rail deformation prevention bracket 504 is provided. The fixed inner rail reinforcing bracket 504 has a plate shape, and has a fitting portion 506 applied to the fixed inner rail 416 at each end portion in the front-rear direction of the vehicle. The fixed inner rail reinforcing bracket 504 is squeezed together with the fixed inner rail 416 with respect to the fixed bracket 414 for fixing the fixed inner rail 416 to the vehicle floor. The plate thickness of the fixed inner rail deformation prevention bracket 504 is such that when the rotational force that flattens the second arc-shaped cross-section groove 426 is applied to the second arc-shaped cross-section groove 426 from the inside, The thickness is effective to prevent the second arcuate cross-sectional groove 426 from being flattened against a strong rotational force.

Next, as shown in FIGS. 17 and 26, the vehicle seat longitudinal positioning mechanism 404 of 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. 15).

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 14)

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.

With respect to the positioning mechanism 408 of the vehicle seat in the vehicle height direction, an operation lever 470, a pumping brake unit 472 having a pinion gear 471, a sector gear 474, and a connecting bracket 476 are provided on the side frame side. 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 100 having the above configuration will be described below with reference to the drawings.
First, when the back seat B is locked with respect to the cushion seat C, the operation lever 22 is urged by the spring 64, and in this state, as shown in FIG. The sliding engagement member 20 engages with the protruding engagement portion 42 of the cam surface 40. As a result, each of the sliding locking members 20 moves outward while being guided along the guide side wall 30 of the base member 16, and the outer teeth 38 and the inner teeth 54 of the rotating arm 14 mesh with each other. The locked state in which the rotation of the fourteen base members 16 is restricted is maintained.

In such a locked state, when an excessive impact force is applied to the back seat B due to, for example, a collision accident, the impact force is transmitted from the back seat B to the rotating arm 14 via the mounting portion 36, and further, the rotating arm 14. The outer teeth 38 and the inner teeth 54 of the pair of sliding locking members 20 are engaged with each other, the cam surfaces 40 of the pair of sliding locking members 20 are engaged with the cams 18, and the pivot shaft 24 penetrating the cams 18. The load is transmitted to the cushion sheet C fixed to the base member 16. At this time, the plate thickness of the annular ring of the rotating arm 14, that is, the plate thickness of the external teeth 38 and the plate thickness of the base member 16 are set to values having such strength that can withstand such a load. The reclining function can be maintained regardless of the impact force.
When releasing the locked state of the back seat B with respect to the cushion seat C and rotating the back seat B, the cam 18 is similarly rotated in the same direction by rotating the operation lever 22 against the coil spring 64. Therefore, as shown in FIG. 12, the engagement state between the engaging portion 43 of the cam 18 and the protruding engaging portion 42 of the sliding locking member 20 is released. In such a state, when the back seat B is tilted, the rotation arm 14 is thereby rotated, and the sliding engagement member 20 is applied by the force applied to the sliding engagement member 20 from the inner teeth 54. It slides inward, and the engaging recess 44 of the sliding locking member 20 and the protruding engaging portion 45 of the cam 18 are engaged. In this state, the meshing state between the inner teeth 54 and the outer teeth 38 is released. As a result, the locked state is released, and the back seat B can be tilted at a desired angle with respect to the cushion seat C. When the back seat B is tilted by a desired angle, the cam 18 is rotated in the reverse direction by releasing the rotation of the operation lever 22, whereby the sliding engagement member 20 is slid outward in the radial direction again. As a result, the meshing state of the inner teeth 54 and the outer teeth 38 is restored and the locked state is restored.

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. Thereby, 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.

When adjusting the position of the vehicle cushion seat in the vehicle front-rear direction, the movable outer rail 418 is moved in the vehicle front-rear direction with respect to the fixed inner rail 416, whereby the retainer between the movable outer rail 418 and the fixed inner rail 416 is obtained. The ball 445 held by the motor 412 is fixed between the first projecting movable surface 432 of the movable outer rail 418 and the first projecting fixed surface 422 of the fixed inner rail 416 and the second projecting movable surface 434 of the movable outer rail 418. By rolling with the second overhanging fixed surface 424 of the inner rail 416, the movable outer rail 418 moves along with the retainer 412 so as to be smoothly slidable in the longitudinal direction of the vehicle with respect to the fixed inner rail 416. .

When the vehicle collides forward with the occupant tightening the belt, when the impact load is applied to the movable outer rail 418 through the belt buckle 438 as a belt input load, the movable side surface 430 of the movable outer rail 418 is fixed. The fixed side surface 420 of the inner rail 416, and thus the retainer side surface portion 440 of the retainer 412 is oriented in the direction along the vehicle height direction, and the rail structure vertical composed of the movable outer rail 418, the fixed inner rail 416 and the retainer 412 is schematically shown. By making the section a so-called vertically long cross section, the section modulus can be secured more efficiently than the case of using a horizontally long cross section for the bending moment load around the neutral line extending in the vehicle width direction in the vertical cross section of the rail. For example, it is possible to reduce the weight by suppressing the increase in rail thickness. Ritsutsu, it becomes possible to effectively secure the necessary strength.

At this time, since the belt is bridged obliquely forward from the movable outer rail 418, a load in the vehicle longitudinal direction component, a load in the vehicle width direction component, and a load in the vehicle height direction component are applied to the rail. Therefore, a rotational moment that rotates the rail around the longitudinal direction of the vehicle acts on the rail structure in the vertical cross section, and the first projecting movable surface 432 and the second movable surface 432 of the movable outer rail 418 holding the ball 445. The first arcuate cross-sectional groove 436 provided on the overhanging movable surface 434 and the second arcuate cross-sectional groove 426 provided on the first overhanging fixing surface 422 and the second overhanging fixing surface 424 of the fixed inner rail 416 are deformed in a flattening direction. The force is applied, and the second arcuate cross-sectional groove 426 located at the lowermost part in the longitudinally long cross section loses the groove, thereby causing the ball 445 to fall off. In particular, when the movable outer rail 418 is at the rearmost position in the vehicle front-rear direction with respect to the fixed inner rail 416, the end of the movable outer rail 418 on the vehicle rear side overhangs from the fixed inner rail 416, so-called one piece. Such a situation is likely to be triggered because it is in the state of a beam.

However, the movable outer rail reinforcing bracket 500 is provided at the end of the movable outer rail 418 on the vehicle rear side with respect to the movable outer rail 418, and the movable outer rail reinforcing bracket 500 is formed in the first arcuate cross-sectional groove 436. Since the reinforcing bead 502 for preventing the deformation of the movable outer rail 418 is provided at the lower part thereof, the deformation force as described above can be obtained. In contrast, the flattening of the first arc-shaped cross-sectional groove 436 can be suppressed, and a fixed inner rail deformation preventing bracket 504 is provided at the end of the fixed inner rail 416 on the vehicle rear side. The fixed inner rail deformation preventing bracket 504 is in close contact with the portion corresponding to the second arcuate cross-sectional groove 426 and is applied to the portion from the inside. Therefore, it is possible to suppress the flattening of the second arc-shaped cross-sectional groove 426 against the deformation force as described above. From the above, the impact load is applied to the rail of the slide structure of the vehicle seat. When loaded, the ball 445 can be prevented from falling off by preventing the loss of the first and second arcuate cross-sectional grooves.

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 description has been made with reference to an automobile seat, but the present invention is not limited thereto, and is applicable 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.

  The vehicle seat slide structure according to the present invention and the vehicle seat having the structure are provided with a movable outer rail reinforcing bracket and a fixed inner rail deformation preventing bracket for the movable outer rail and the fixed inner rail, respectively. Effectively preventing the ball from falling off by suppressing the flattening of the first arc-shaped cross-section groove and the second arc-shaped cross-section groove holding the ball due to the rotational force centered on the longitudinal direction of the vehicle in the longitudinal section of the rail It is industrially useful in that it can be done.

1 is a perspective view of a vehicle seat according to an embodiment of the present invention. 1 is a side view of a vehicle seat according to an embodiment of the present invention. It is sectional drawing which follows the line AA of FIG. FIG. 2 is a detailed view of part A in FIG. 1. It is sectional drawing which follows the line BB of FIG. 1 is a schematic perspective view of a recliner for a vehicle seat according to an embodiment of the present invention. It is a side view of the recliner of the vehicle seat which concerns on embodiment of this invention. It is sectional drawing which follows the line AA of FIG. 1 is a schematic exploded perspective view of a recliner for a vehicle seat according to an embodiment of the present invention. It is a schematic perspective view of the sliding locking member of the recliner of the vehicle seat which concerns on embodiment of this invention. It is the schematic which shows the locked state by the recliner of the vehicle seat which concerns on embodiment of this invention. It is the schematic which shows the lock release state by the recliner of the vehicle seat which concerns on embodiment of this invention. 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. 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. FIG. 2 is a longitudinal sectional view at a vehicle longitudinal direction position where a movable outer rail reinforcing bracket is provided 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 a retainer. In the slide structure of the vehicle seat which concerns on embodiment of this invention, it is a partial side view which shows the input state of the load to a rail through a belt. It is a perspective view of the bracket for reinforcement of the movable outside rail in the slide structure of the vehicular seat concerning the embodiment of the present invention. It is an exploded view around the belt buckle of the movable outer 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 fragmentary perspective view which shows the state in which the bracket for deformation prevention of a fixed inner rail is attached. FIG. 5 is a partial perspective view showing a deformation preventing bracket for 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 partial side view which shows the state in which the bracket for deformation prevention of a fixed inner rail is attached. 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.

Explanation of symbols

C Cushion Seat B Back Seat 10 Recliner 12 Connecting Shaft 14 Rotating Arm 16 Base Member 18 Rotating Cam 20 Sliding Locking Member 22 Operation Lever 24 Axle 26 Inserting Hole 28 Pair of Openings 30 Guide Side Wall 32 Arc-Shaped Side Wall 34 Base bracket 38 External tooth 40 Cam surface 42 Projection engagement portion 44 Engagement recess 52 Circular opening 54 Internal tooth 58 Lid plate 62 Hold pin 64 Spring 70 Spiral spring 100 Vehicle seat 102 Oblique wire 104 Cushion seat frame structure 106 Lower end 108 Rear end portion 110 Cable stay wire 112 Back seat frame structure 114 Recliner structure portion 116 Vehicle seat frame structure portion 118 Pair of side frames 120 Upper frame 122 Main side surface portion 124 Flat mat 126 If the overlapping portion 128 pulley 130 volts - nut unit 132 volts 134 bore 136 nut 140 pair of side frames 141 rear frame 142 front frame 144 cushion spring 146 main side portion 148 flange portion
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 420 Fixed Side 421 Movable Locking Hole 422 First Overhang Fixed Upper Surface 424 Second Overhang Fixed Lower Surface 426 Second Two arc-shaped sectional grooves 428 Fixed locking hole 430 Movable side surface 432 First projecting movable upper surface 434 Second projecting movable lower surface 436 First arc-shaped 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 500 Movable outer rail reinforcement bracket 502 Reinforcement bead 504 Fixed inner rail deformation prevention bracket 506

Claims (9)

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.
Locking means for locking the movable outer rail with respect to the fixed inner rail in the vehicle front-rear direction;
The movable outer rail includes a movable side surface extending in the longitudinal direction of the vehicle, a first projecting movable surface projecting from one edge of the movable side surface, and a second projecting movable surface projecting from the other edge of the movable side surface. It has a substantially U-shaped cross section with
The fixed inner rail includes a fixed side surface extending in the front-rear direction of the vehicle, a first protruding fixed surface that protrudes from one edge of the fixed side surface, and a second protruding fixed surface that protrudes from the other edge of the fixed side surface. It has a substantially U-shaped cross section with
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.
Furthermore, a retainer extending in the vehicle front-rear direction is provided between the fixed inner rail and the movable outer rail,
The retainer includes a retainer side surface extending in the front-rear direction of the vehicle, a plurality of first retainer overhanging upper surfaces protruding from one edge of the retainer side surface and spaced apart from each other by a predetermined distance in the vehicle front-rear direction, and the retainer side surface A substantially U-shaped cross section provided with a plurality of second retainer overhanging lower surfaces extending from the other edge of the vehicle and spaced apart by a predetermined distance in the longitudinal direction of the vehicle,
The retainer has the plurality of first retainer overhanging surfaces as the first overhanging movable surface 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 upper surfaces and the plurality of second retainer overhanging lower surfaces each have a 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 In the slide structure of the vehicle seat, the outer rail is movable in the longitudinal direction of the vehicle with respect to the fixed inner rail together with the retainer.
The movable side surface, the fixed side surface, and the retainer side surface portion are arranged along the height direction of the vehicle, whereby both the fixed inner rail and the movable outer rail are vertically elongated in the vehicle height direction. Arranged to be
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 has a second arc-shaped cross-sectional groove extending in the front-rear direction of the vehicle on the outer surface thereof,
A guide groove for guiding the ball in the front-rear direction is formed by the first arc-shaped cross-sectional groove and the second arc-shaped cross-sectional groove,
A movable outer rail reinforcing bracket that is in close contact with a portion corresponding to the first arc-shaped cross-sectional groove and is applied to the portion from the outside is provided at an end of the movable outer rail on the vehicle rear side,
The movable outer rail reinforcing bracket is provided with a reinforcing bead on its lower surface for preventing deformation of the movable outer rail,
At the vehicle rear side end portion of the fixed inner rail, there are a bottom portion that is in close contact with the fixed side surface, and a portion that is in close contact with a portion corresponding to the second arc-shaped cross-sectional groove and is applied to the portion from the inside. A bracket for preventing deformation of the fixed inner rail is provided,
The movable outer rail reinforcing bracket and the fixed inner rail deformation preventing bracket are both the first arc-shaped cross-sectional groove and the second arc-shaped cross-sectional groove due to a torsional moment centered on the front-rear direction of the vehicle in the event of a vehicle collision. Have a sufficient thickness to prevent each flattening,
A vehicle seat slide structure characterized by that. The fixed inner rail is provided with a fixing bracket for fixing to the vehicle floor on each of the vehicle front side and the vehicle rear side,
The movable outer rail reinforcing bracket is provided in a portion that overhangs from the fixed bracket on the vehicle rear side toward the vehicle rear when the movable outer rail is at the rearmost position of the vehicle with respect to the fixed inner rail. The vehicle seat slide structure according to claim 1.     The vehicle seat sliding structure according to claim 1, wherein the movable outer rail reinforcing bracket is a plate having a substantially U-shaped cross section.     2. The vehicle seat slide structure according to claim 1, wherein the fixed inner rail deformation preventing bracket has a plate shape and has a fitting portion applied to each of the front and rear direction end portions of the vehicle. The vehicle seat sliding structure according to claim 4, wherein the fixed inner rail deformation preventing bracket is fastened together with the fixed inner rail with respect to a fixed bracket for fixing the fixed inner rail to a vehicle floor.     A vehicular cushion seat comprising the vehicular seat slide structure according to claim 1.     A vehicle seat, comprising: the vehicle cushion seat according to claim 6; a vehicle back seat; and a recliner that enables the vehicle back seat to tilt with respect to the vehicle cushion seat. 2. The vehicle seat slide structure according to claim 1, 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. 2. The vehicle seat according to claim 1, 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. Slide structure.

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