Seat for vehicle

Abstract

To provide a seat for a vehicle which suppresses displacement due to excessive load during a collision.SOLUTION: A seat S for a vehicle includes: a seat body Sh; a slide rail 4 which includes a lower rail 5 and an upper rail 6 supported so as to be movable relative to the lower rail and slides and moves the seat body along the cross direction of the seat for the vehicle; and a base frame 12 which includes a connection part 15 for connecting the upper rail with the seat body and an extension part 13b extending from the connection part toward the frontward direction of the seat for the vehicle. The extension part is provided so that a part of the underside of the extension part comes into contact with a part of the top faces of rail members 31, 32, constituting the upper rail when at least a prescribed load is applied. The extension part and the rail members include a restriction part 7 which restricts movement of the base frame in the width direction of the seat for the vehicle.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat that is suppressed from being displaced during a collision. [Background technology]

[0002] ISOFIX is an international standard for attaching a child car seat to a vehicle such as an automobile. For example, as described in Patent Document 1, the ISOFIX mechanism secures the child car seat to the seat by connecting a connector on the child car seat to a mounting bracket called a lower anchor provided on the seat.

[0003] In the prior art described in Patent Document 1, the lower part of the child car seat is attached to the seat with a locking arm. For example, although not shown, the lower anchor is configured as a U-shaped mounting bracket attached to a pipe spanning the left and right sides of the seat cushion frame. By attaching the child car seat to the seat back and engaging the tether anchor with the rear surface of the seat back, the child car seat and seat back are fixed together. The lower anchor functions only as a fixing part for the child car seat; ensuring the rigidity of the seat frame and measures against deformation must be implemented separately through the mechanism and materials of the seat frame.

[0004] When a child car seat is attached to a seat back using a tether anchor and an excessive impact load is applied from the front due to a frontal collision or other event, the inertial force acting on the child car seat and seat cushion generates a force that tends to move the child car seat and seat cushion forward. This places a load on the seat back that is fixed integrally with the child car seat, and in some cases the seat back tilts forward and is significantly displaced.

[0005] Patent Document 2 discloses a structure for preventing a seat cushion from coming off due to the force acting during a frontal collision. Specifically, the structure is configured such that the peripheral edges of engagement holes on the rear side of a pair of brackets erected at the rear of a support frame are securely engaged by the engaging surfaces of guide hooks, and the seat cushion, which moves forward during a collision, is held by the guide hooks. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5248093 [Patent Document 2] Patent No. 6544636 Summary of the Invention [Problem to be solved by the invention]

[0007] In the invention disclosed in Patent Document 2, although the forward movement of the seat cushion is prevented by a guide hook, the load on the seat back is not reduced, which means that there is a possibility that the seat back will tilt forward and be significantly displaced in the event of a collision.

[0008] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a vehicle seat in which displacement due to an excessive load during a collision is suppressed. [Means for solving the problem]

[0009] The above problem is solved by a vehicle seat having a seat body, lower rails, and upper rails supported so as to be movable relative to the lower rails, slide rails that allow the seat body to slide along the fore-and-aft direction of the vehicle seat, a base frame having a connection portion that connects the seat body and the upper rails, and an extension portion that extends from the connection portion toward the front of the vehicle seat, wherein the extension portion is arranged so that a portion of the lower surface of the extension portion and a portion of the upper surface of a rail member that constitutes the upper rail come into contact when at least a predetermined load is applied, and the extension portion and the rail member have a regulating portion that regulates movement of the base frame in the width direction of the vehicle seat.

[0010] According to the vehicle seat described above, the base frame includes an extension portion extending forward from the connection portion, and the extension portion is configured so that a portion of the lower surface of the extension portion abuts a portion of the upper surface of the rail member when at least a predetermined load is applied, thereby suppressing rotation of the base frame and also suppressing displacement of the seat body connected to the base frame. Furthermore, since the restricting portion restricts the movement of the base frame in the width direction, the seat body is reliably supported by the base frame, and displacement of the seat body can be suppressed.

[0011] In the vehicle seat described above, when the predetermined load is not applied, a gap may be provided between a part of the lower surface of the extension portion and a part of the upper surface of the rail member. With the above configuration, it is possible to suppress the generation of abnormal noise due to contact between the extension portion and the rail member.

[0012] In the vehicle seat described above, the restricting portion may be configured such that an insertion hole is formed in one of the extension portion and the rail member, and the other has a protrusion that is inserted into the insertion hole. The above configuration suppresses displacement of the base frame in the width direction.

[0013] In the vehicle seat, it is preferable that a plurality of the insertion holes through which the protrusions are inserted are formed in the front-rear direction. By forming a plurality of insertion holes in the front-rear direction, displacement in the width direction can be efficiently suppressed.

[0014] In the above-mentioned vehicle seat, a gap may be formed between the inner wall surface of the insertion hole and the side of the protrusion, and when the specified load is applied, the side of the protrusion and the inner wall surface of the insertion hole may abut. With the above configuration, it is possible to suppress the amount of displacement in the width direction and also to suppress the generation of abnormal noise when a predetermined load is not applied.

[0015] In the vehicle seat described above, the slide rail may have a locking mechanism that restricts movement of the upper rail, and the protrusion may be provided on the locking mechanism. With the above configuration, the protrusion is provided on the locking mechanism, so that the protrusion can be provided without adding a new member, and displacement in the width direction can be efficiently suppressed.

[0016] In the vehicle seat described above, the connecting portion of the base frame may be fixed to a rear portion of the upper rail, and the extending portion may be provided at a position that overlaps vertically with the locking mechanism in a side view. The extending portion may be provided at a position that overlaps vertically with the locking mechanism with a space therebetween in a side view. The above configuration makes it possible to suppress displacement with a compact arrangement.

[0017] In the vehicle seat described above, a notch may be formed between the connecting portion and the extending portion to avoid the locking mechanism. The above-described configuration eliminates interference between the base frame and the locking mechanism, allowing the extension portion to be arranged compactly.

[0018] In the vehicle seat described above, the base frame may have a bulging portion formed to bulge outward in a width direction of the vehicle seat and extend in a front-rear direction. The above configuration improves the rigidity of the base frame.

[0019] In the vehicle seat described above, the base frame may have a flange portion at an outer peripheral end, and the extension portion may be formed to have a U-shaped cross section that opens toward the inside in the width direction of the vehicle seat. With the above configuration, the rigidity of the back frame is improved, and the rigidity of the extension portion is also improved.

[0020] In the above-mentioned vehicle seat, it is preferable that the connection portion of the base frame has a reclining mechanism that rotates the seat body, a rear bracket that connects the seat body and the upper rail at a position opposite the base frame, and two connecting members that connect the base frame and the rear bracket at positions before and after the reclining mechanism. The above configuration improves the rigidity of the base frame. [Effects of the Invention]

[0021] According to the vehicle seat of the present invention, the base frame includes an extension portion extending forward from the connection portion, and the extension portion is configured so that a portion of the lower surface of the extension portion abuts a portion of the upper surface of the rail member at least when a predetermined load is applied. This suppresses rotation of the base frame and suppresses displacement of the seat body connected to the base frame. Furthermore, because the restricting portion restricts movement of the base frame in the width direction, the seat body is reliably supported by the base frame, suppressing displacement of the seat body. Furthermore, the vehicle seat of the present invention can suppress the generation of abnormal noise caused by contact between the extension portion and the rail member. Furthermore, according to the vehicle seat of the present invention, displacement of the base frame in the width direction is suppressed. Furthermore, according to the vehicle seat of the present invention, a plurality of insertion holes are formed in the front-rear direction, so that displacement in the width direction can be efficiently suppressed. Furthermore, the vehicle seat of the present invention can suppress the amount of displacement in the width direction, and can also suppress the generation of abnormal noise when a predetermined load is not applied. Furthermore, according to the vehicle seat of the present invention, the protrusion is provided on the locking mechanism, so that the protrusion can be provided without adding any new components, and displacement in the width direction can be efficiently suppressed. Furthermore, by supporting the extension portion with a space in a position where it overlaps vertically with the locking mechanism in a side view, displacement can be suppressed with a more compact arrangement. In addition, a notch is formed between the connection portion and the extension portion to avoid the locking mechanism, thereby eliminating interference between the base frame and the locking mechanism and allowing the extension portion to be positioned compactly. Furthermore, since the base frame has the bulging portion, the rigidity of the base frame is improved. Furthermore, since the base frame has a flange portion at the outer peripheral end and the extension portion is formed with a U-shaped cross section that opens inward in the width direction, the rigidity of the base frame and the extension portion are also improved. Furthermore, by providing two connecting members that connect the base frame and the rear bracket at positions before and after the reclining mechanism, the rigidity of the base frame is improved. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a perspective view showing the appearance of a vehicle seat according to an embodiment of the present invention; [Figure 2] FIG. 2 is a perspective view of a seat frame included in the vehicle seat. [Figure 3] FIG. 1 is a side view of a vehicle seat. [Figure 4] FIG. 4 is an enlarged view showing a portion A of FIG. 3. [Figure 5] 10A and 10B are schematic diagrams illustrating a state of a vehicle seat when an excessive load is applied; [Figure 6] 2 is a perspective view showing a connection state between a base frame and a slide rail, as viewed from the X direction in FIG. 1. FIG. [Figure 7]FIG. 2 is a perspective view of a rail bracket that constitutes the base frame. [Figure 8] FIG. 7 is a cross-sectional view taken along line VIII-VIII in FIG. 6. [Figure 9] FIG. 7 is a cross-sectional view taken along line IX-IX in FIG. 6. [Figure 10] FIG. 7 is a cross-sectional view taken along line XX in FIG. 6. [Figure 11] FIG. 10 is a diagram showing another example of a protrusion. DETAILED DESCRIPTION OF THE INVENTION

[0023] The configuration of a vehicle seat according to one embodiment of the present invention will be described below with reference to the drawings. However, the embodiment described below is intended to facilitate understanding of the present invention and is not intended to limit the present invention. In other words, the present invention may be modified or improved without departing from the spirit thereof, and of course, the present invention also includes equivalents thereof. In the following description, the contents regarding the materials, shapes, and sizes of the seat components are merely examples and do not limit the present invention.

[0024] In the following, a vehicle seat mounted on a vehicle will be taken as an example of a vehicle seat, and an example of its configuration will be described. However, the present invention is not limited to vehicle seats mounted on ground vehicles having wheels such as automobiles and trains, and can also be applied to seats mounted on aircraft, ships, and other vehicles that move on non-ground surfaces.

[0025] In the following description, the "front-rear direction" refers to the front-rear direction of the vehicle seat (in other words, the front-rear direction of the seat body), which is the direction that coincides with the traveling direction when the vehicle is traveling. The "seat width direction" refers to the width direction of the vehicle seat (in other words, the width direction of the seat body), which is the direction that coincides with the left-right direction as seen by an occupant seated in the vehicle seat. The "up-down direction" refers to the up-down direction of the vehicle seat, which is the direction that coincides with the vertical direction when the vehicle is traveling on a horizontal plane.

[0026] In addition, the "outside of the vehicle" in the seat width direction means the side closer to the outside of the vehicle body (or, more simply, the side closer to the nearest door), and the "inside of the vehicle" means the side closer to the inside of the vehicle body (or, more simply, the side farther from the nearest door). In the following description, unless otherwise specified, "rotation" means a rotational movement about an axis along the sheet width direction.

[0027] The shapes, positions, and postures of the various parts of the vehicle seat described below will be explained assuming that the vehicle seat is in the seated state described below, unless otherwise specified.

[0028] <Vehicle seat S> The basic configuration of a vehicle seat according to this embodiment (hereinafter referred to as vehicle seat S) will be described with reference to Fig. 1. Fig. 1 is a perspective view of the vehicle seat S. For convenience of illustration, Fig. 1 shows a portion of the vehicle seat S with a trim cover T removed.

[0029] The vehicle seat S is placed on the vehicle floor and is a seat in which a vehicle occupant sits. In this embodiment, the vehicle seat S is used as a rear seat corresponding to the rear seat of the vehicle. However, the vehicle seat S is not limited to this, and can also be used as a front seat, and can also be used as a middle seat in the second row or a rear seat in the third row in a vehicle having three rows of seats in the front-to-rear direction.

[0030] As shown in Fig. 1, a vehicle seat S has a seat body Sh that forms its main body. As shown in Fig. 1, the seat body Sh mainly comprises a seat back 1 that serves as a backrest portion supporting the back of the seated occupant, a seat cushion 2 that serves as a seating portion supporting the buttocks of the seated occupant, and a headrest 3 that is disposed on top of the seat back 1 and supports the head of the seated occupant. The seat back 1 and the seat cushion 2 are connected to sandwich a reclining mechanism 19, which will be described later. The seat back 1 is attached to the vehicle floor via a base frame 12, which will be described later, in a manner that allows it to rotate relative to the vehicle floor.

[0031] As shown in Fig. 2, a seat frame F is provided inside the vehicle seat S, and the seat frame F is composed of a seat back frame 10 which is the frame of the seat back 1, a seat cushion frame 20 which is the frame of the seat cushion 2, and a base frame 12. The base frame 12 is connected to the lower end of the back side frame 11 of the seat back frame 10 via a reclining mechanism 19.

[0032] A pad member P and a trim cover T are provided on the outside of the seat back frame 10 and the seat cushion frame 20, thereby constituting the seat back 1 and the seat cushion 2. The pad member P is a urethane base material formed by foam molding using, for example, a urethane foam material, and the trim cover T is made of a material such as cloth or leather.

[0033] The rear end of the seat cushion 2 is connected to the side of the seat back 1. As shown in FIGS. 1 and 2, a cushion side frame 21 (described later) is interposed between the rear end of the seat cushion 2 and the lower end of the seat back 1. The cushion side frame 21 is attached to the seat back 1 in a rotatable state. This allows the seat cushion 2 to rotate together with the seat back 1.

[0034] Further, a slide rail 4 (described later) is installed below the seat body Sh. The slide rail 4 allows the seat body Sh to be attached to the vehicle floor in a state where it can slide back and forth.

[0035] The seat body Sh can be folded and stored in a storage floor formed in front of it. The storage floor is a recessed space formed by recessing a part of the vehicle floor (specifically, the part of the vehicle floor that is located in front of the seat body Sh when the seat body Sh is in a seated position) downward.

[0036] As shown in FIG. 2, the seat frame F mainly comprises a seat back frame 10 that forms the framework of the backrest portion of the seat frame F, and a seat cushion frame 20 that forms the framework of the sitting portion of the seat frame F. The seat back frame 10 mainly includes a pipe frame 18 made of pipes processed into a rectangular frame shape, a back panel 22, and a back side frame 11.

[0037] The backside frames 11 are frames that extend in the vertical direction and are attached to the left and right side portions of the pipe frame 18, respectively. In other words, the backside frames 11 are arranged on the seat outer side of the pipe frame 18, and constitute the left and right ends of the seatback frame 10 together with the side portions of the pipe frame 18. The backside frames 11 are plate-like frames with a U-shaped cross section that opens toward the inside of the seat. The upper portions of the backside frames 11 are welded to the center portions of the side portions of the pipe frame 18, and are attached rotatably to the base frame 12, which will be described later.

[0038] The upper part of the base frame 12 is connected to the backside frame 11 via a reclining mechanism 19. The lower part of the base frame 12 is fastened to the upper rail 6 of the slide rail 4 with a bolt (see FIGS. 3 and 4).

[0039] The slide rails 4 are devices for sliding the seat body Sh in the front-rear direction and have a known structure (the structure of a typical slide rail mechanism). The slide rails 4 include a pair of lower rails 5 fixed to the vehicle floor and a pair of upper rails 6 that are slidable relative to the lower rails 5 (see FIGS. 1 and 2). The upper rails 6 are slidable relative to the lower rails 5 that are fixed to the vehicle body. A seat back frame 10 is attached to the upper rails 6 via a base frame 12, and the seat back frame 10 can move forward and backward together with the upper rails 6 relative to the lower rails 5. Therefore, the seat body Sh attached to the upper rails 6 moves forward and backward as the upper rails 6 slide.

[0040] 6, the slide rail 4 includes a locking device 30 (an example of a locking mechanism) that locks the sliding movement of the upper rail 6, and a cable (not shown) that unlocks the locking device 30. The locking device 30 includes a lock bracket 31 and a cable bracket 32 ​​that holds the cable.

[0041] The upper rail 6 is normally locked by the locking device 30 in a state that prevents it from sliding, and when the occupant performs a predetermined operation, it is unlocked and becomes slidable. More specifically, an operating member (not shown) is connected to the locking device 30 via a cable. As a general device for locking the upper rail 6 can be used for the locking device 30, a detailed description thereof will be omitted. When the operating member is operated, the cable is pulled, and as a result, the locking device 30 operates to unlock the upper rail 6.

[0042] <Base frame> The base frame 12 will be described in detail with reference to Figures 4 to 6. As described above, the base frame 12 is a member that connects the lower part of the back side frame 11 to the upper rail 6. The base frame 12 is composed of a rail bracket 13 that connects to the upper rail 6 and a connecting bracket 14 that connects to the back side frame 11. The rail bracket 13 and the connecting bracket 14 are fastened together with three bolts 17 as shown in Figure 4.

[0043] The rail bracket 13 has a bracket main body 13a that functions as a connection portion 15 that connects to the upper rail 6, and an extension portion 13b that extends from the bracket main body 13a toward the front of the vehicle seat S. The bracket main body 13a and the connecting bracket 14 of the rail bracket 13 form the connection portion 15 that connects the seat main body Sh and the upper rail 6.

[0044] In the vehicle seat S of this embodiment, a gap L is provided between the underside 13e of the extension portion 13b of the rail bracket 13 and the upper surfaces (end surfaces 31b, 32b shown in FIG. 9) of the lock bracket 31 and the cable bracket 32, which are rail members that constitute the upper rail 6. The size of the gap L is approximately 1.5 mm, which is narrower than the thickness J (approximately 2.6 mm) of the rail bracket 13. When a predetermined load is applied, the rail bracket 13 rotates, causing the underside 13e of the extension portion 13b to come into contact with the end surfaces 31b, 32b of the lock bracket 31 and the cable bracket 32. The lower surface 13e of the extension portion 13b and the end surfaces 31b, 32b of the lock bracket 31 and the cable bracket 32 ​​may be arranged to abut against each other under normal conditions when no load is applied.

[0045] As shown in FIG. 3, in recent years, a child seat 40 has come to be fixed to a vehicle seat S using a lower anchor 41 (see FIG. 2) and a tether anchor 42 (see FIG. 2), which are part of the ISOFIX mechanism. Because the child seat 40 is directly fixed to the seat back 1, when an excessive impact load is applied from the front due to a collision or the like, the child seat moves forward (in the direction of arrow C) due to inertial force, which in turn tilts the seat back 1 in the direction of arrow B. Furthermore, when an excessive load is applied to the seat back 1 due to a collision or the like, the upper rail 6 is displaced forward so as to lift up. At this time, the extension portion 13b of the base frame 12 connected to the back side frame 11 abuts against the end faces 31b, 32b of the lock bracket 31 and the cable bracket 32, thereby preventing rotation in the direction B and suppressing displacement of the seat back frame 10. This also suppresses displacement of the seat main body Sh.

[0046] Furthermore, the extending portion 13b, the lock bracket 31, and the cable bracket 32 ​​are provided with restricting portions 7 that restrict movement of the base frame 12 outward in the width direction (the direction of arrow D in FIG. 6). In this embodiment, as shown in FIGS. 6 and 8, the restricting portions 7 are configured by an insertion hole 13d formed in the extending portion 13b and protrusions 31a and 32a provided on the lock bracket 31 and the cable bracket 32, and restrict movement in the width direction by inserting the protrusions 31a and 32a into the insertion hole 13d. In this embodiment, the protrusions 31a and 32a are formed by bending the ends of the lock bracket 31 and the cable bracket 32 ​​into an L-shape.

[0047] As described above, when a predetermined load is applied during a collision, the extension portion 13b abuts against the end faces 31b and 32b of the lock bracket 31 and the cable bracket 32, respectively, stopping the rotation of the base frame 12 and supporting the seat back frame 10 so as not to displace. At this time, with the extension portion 13b in abutting position, the rail bracket 13 tends to deform outward in the width direction. The side surfaces of the protrusions 31a and 32a shown in FIGS. 6 and 8 to 10 abut against the inner wall surfaces of the insertion holes 13d, thereby preventing the extension portion 13b from moving outward in the width direction. This makes it possible to suppress the rail bracket 13 from displacing outward in the width direction.

[0048] The lower surface 13e of the extension portion 13b and the upper surface 31c of the lock bracket 31 are opposed surfaces that are substantially parallel to each other, and a space is provided between the lower surface 13e and the upper surface 31c of the lock bracket 31. In this embodiment, the presence of a gap L between the lower surface 13e of the extension portion 13b and the end surface 31b of the lock bracket 31 suppresses the generation of abnormal noise.

[0049] In this embodiment, two insertion holes 13d, through which the protrusions 31a and 32a are inserted, are formed in the extension portion 13b in the front-rear direction. A plurality of protrusions 31a and 32a are provided on the lock bracket 31 and the cable bracket 32 ​​in accordance with the positions of the insertion holes 13d. By forming the insertion holes 13d in the front-rear direction, displacement in the width direction can be efficiently suppressed. In this embodiment, the protrusions 31a, 32a are formed by bending the end of the lock bracket 31 and the end of the cable bracket 32 ​​into an L-shape. Forming the protrusions from two members improves their strength. If the strength is sufficient, the protrusions 31a, 32a may be formed on either the lock bracket 31 or the cable bracket 32.

[0050] As shown in Figure 8, a gap K is formed between the inner wall surface of insertion hole 13d and protrusions 31a, 32a. When a predetermined load is applied, lower surface 13e comes into contact with end surfaces 31b, 32b, and then protrusions 31a, 32a come into contact with the inner wall surface of insertion hole 13d, preventing outward movement of rail bracket 13 in the width direction. The presence of gap K not only suppresses the generation of abnormal noise, but also makes it easier to assemble by inserting protrusions 31a, 32a into insertion hole 13d.

[0051] As shown in Fig. 6, the connection portion 15 (bracket body 13a) of the base frame 12 is fixed with a bolt to the rear portion of the upper rail 6. Also, as shown in Fig. 4, the extension portion 13b of the rail bracket 13 is provided with a space (gap M) at a position where it overlaps vertically with the locking device 30 in a side view (view of the vehicle seat S from the left). This configuration allows for a more compact arrangement.

[0052] 6 and 7, the rail bracket 13 has a notch 13f formed between the bracket main body 13a and the extension portion 13b to avoid the locking device 30. By forming the notch 13f in this manner, interference between the rail bracket 13 and the locking device 30 is eliminated, and the extension portion 13b can be arranged more compactly.

[0053] 4 and 8 to 10, the rail bracket 13 is formed with a bulging portion 13c that bulges outward in the width direction and extends in the front-rear direction. By providing the bulging portion 13c on the rail bracket 13, the rigidity of the rail bracket 13 is improved.

[0054] 6, flange portions 13h, 14a are formed on the outer peripheral ends of the rail bracket 13 and the connecting bracket 14 that constitute the base frame 12. The formation of the flange portions 13h, 14a improves the rigidity of the base frame 12. As shown in FIG. 9, the flange portion 13h is also formed on the outer peripheral end of the extension portion 13b of the rail bracket 13, so that the extension portion 13b has a U-shaped cross section that opens toward the inside in the width direction of the vehicle seat S. The U-shaped cross section improves the rigidity of the extension portion 13b, and displacement of the seat back frame 10 is further suppressed.

[0055] 7, in addition to the bolt holes 13g and the connecting pipe holes 13j, a plurality of through holes 13i and 13k are formed in the side surface of the extension portion 13b of the rail bracket 13. In particular, the through holes 13i are formed between the plurality of bolt holes 13g in the side surface of the bracket main body 13a. By forming the through holes 13i and 13k in the side surface, the weight of the rail bracket 13 can be reduced.

[0056] 2, a rear bracket 23 is provided on the opposite side of the base frame 12, connecting the lower part of the seatback frame 10 (backside frame 11) and the upper rail 6. The rail bracket 13 of the base frame 12 and the rear bracket 23 are connected by two connecting pipes 16 (connecting members) at positions in front of and behind the reclining mechanism 19. The connection by the two connecting pipes 16 improves the rigidity of the seatback frame 10. The connecting bracket 14 and the rail bracket 13 are fastened together by a bolt 17 at a position further forward than the connecting pipe 16 located at the front of the two connecting pipes 16 .

[0057] Another example of the restricting portion 7 (restricting portion 71) will be described using FIG. 11. The restricting portion 7 shown in FIGS. 6 and 8 to 10 is configured by inserting the protrusions 31a, 32a formed on the lock bracket 31 and the cable bracket 32 ​​into the insertion hole 13d formed in the extending portion 13b. The restricting portion 71 shown in FIG. 11 has the same insertion hole 13d formed in the extending portion 13b as that shown in FIG. 6, but the protrusion is different. In the restricting portion 71, a rod-shaped member 32c standing on the end of the cable bracket 32 ​​is provided as the protrusion. At least a tip portion of the rod-shaped member 32c is threaded, and a nut 32d is provided at the tip portion. The nut 32d prevents the extending portion 13b from being displaced upward and coming off the rod-shaped member 32c. If the protrusion amount of the rod-shaped member 32c is sufficiently long, the nut 32d may not be provided. Furthermore, the end of the lock bracket 31 is bent into an L-shape, and when a predetermined load is applied, the end 31d of the lock bracket 31 abuts against the lower surface 13e of the extension 13b.

[0058] The vehicle seat S of this embodiment has been described above using the drawings. In this embodiment, the restricting portion 7 is formed by forming the insertion hole 13d in the extending portion 13b and providing the protrusions 31a, 32a in the lock bracket 31 and the cable bracket 32, but this is just one example. It is also possible to form a protrusion that protrudes downward in the extending portion 13b as the restricting portion, and form an insertion hole in the lock bracket 31 and / or the cable bracket 32. [Explanation of symbols]

[0059] S Vehicle seat (vehicle seat) Sh seat body T trim cover P Pad material 1 seat back 2 seat cushions 3 Headrest 4 slide rails 5 Lower rail 6 Upper Rail 7, 71 Regulatory Department Front seat frame 10 Seat back frame 11 Backside Frame 12 Base Frame 13 Rail bracket 13a Bracket body 13b Extension 13c bulge 13d Insertion hole 13e Bottom side 13f notch 13g bolt hole 13h Flange 13i, 13k through hole 13j Connecting pipe hole 14 Connecting bracket 14a Flange 15 Connection 16 Connecting pipe 17 volts 18 Pipe Frame 19 Reclining mechanism 20 Seat cushion frame 21 Cushion side frame 22 Back Panel 23 Rear bracket 30 Locking device (locking mechanism) 31 Lock bracket (rail component) 31a Protrusion 31b, 31d End surface (part of the upper surface) 31c top surface 32 Cable bracket (rail component) 32a Protrusion 32b End face (part of the top face) 32c Rod-shaped member 32d Nut 40 Child Seat 41 Roaanka 42 Tether Anchor K, L, M gap J wall thickness

Claims

[Claim 1] It is a seat for a vehicle, The seat body and A slide rail having a lower rail and an upper rail supported so as to be movable relative to the lower rail, which slides the seat body along the front-rear direction of the vehicle seat, The base frame comprises a connecting portion that connects the seat body and the upper rail, and an extension portion that extends forward from the connecting portion toward the front of the vehicle seat. The aforementioned extension portion is characterized by having a converging region in which the width in the left-right direction converges so as to become narrower towards the front end, making it a seat for a vehicle.

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