Vehicle seats

Abstract

To provide a vehicular seat that suppresses a displacement due to an excessive load when a collision occurs.SOLUTION: A vehicular seat S according to the present invention includes: a seat main body Sh; a seat frame F that is designed as the frame of the seat main body; a slide rail 4 that slides the seat main body along the back-and-forth direction of the vehicular seat; a seat frame side member 30 provided on the seat frame; and a rail side member 40 which is located near the seat frame side member and is provided on the slide rail with a clearance between itself and the seat frame side member, when the seat main body is located at a forward position from the rearmost position of the sliding movement. When a predetermined load is applied to the seat main body, the seat frame side member is moved, and thus the seat frame side member and the rail side member abut with each other.SELECTED DRAWING: Figure 3

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 problem is to provide a vehicle seat including a seat body, a seat frame that forms the framework of the seat body, a slide rail that slides the seat body along the front-rear direction of the vehicle seat, a seat frame side member provided on the seat frame, and a rail side member that is located near the seat frame side member and is provided on the slide rail with a gap between it and the seat frame side member when the seat body is at a position moved forward from the rearmost position of the sliding movement, and when a predetermined load is applied to the seat body, the seat frame side member moves and a first abutment surface extending in the up-down direction of the seat frame side member comes into abutment with a second abutment surface extending in the horizontal direction of the rail side member. Both the seat frame side member and the rail side member have a hook-shaped portion in which a notch extending in the front-rear direction of the vehicle seat is formed. This is solved by:

[0010] When a predetermined load, such as a forward load during a collision, is applied to the seat body, the seat frame side member moves with the seat body, causing the seat frame side member to come into contact with the rail side member, thereby suppressing displacement of the seat body. This simple structure makes it possible to suppress displacement due to excessive load during a collision. Furthermore, it moves easily in coordination with the forward and backward movement of the slide rail, and can reliably suppress displacement of the seat body even when an excessive load is applied.

[0011] The above problem is solved by a vehicle seat comprising: a seat body; a seat frame that forms the skeleton of the seat body; a slide rail that slides the seat body in the fore-and-aft direction of the vehicle seat; a seat frame side member provided on the seat frame; and a rail side member that is located near the seat frame side member and is provided on the slide rail with a gap between it and the seat frame side member when the seat body is in a position moved forward from the rearmost position of the sliding movement, wherein when a predetermined load is applied to the seat body, the seat frame side member moves and a first abutment surface extending in the up-and-down direction of the seat frame side member abuts against a second abutment surface extending in the horizontal direction of the rail side member, the seat frame side member and the rail side member each having a notch that extends in the fore-and-aft direction of the vehicle seat, and a first hook-shaped portion and a second hook-shaped portion that engage with each other when the seat body is in a position moved forward from the rearmost position. The first hook-shaped portion and the second hook-shaped portion, which have cutouts formed therein extending in the front-rear direction, engage with each other, thereby making it possible to suppress displacement of the seat body with a simple structure.

[0012] In the vehicle seat, the first contact surface of the seat frame side member and the second contact surface of the rail side member may be disposed opposite each other across the gap and may be disposed so as to intersect each other at right angles. Since the first abutment surface of the seat frame side member and the second abutment surface of the rail side member are arranged to intersect and abut, when a load is applied to the seat body, the load can be reliably absorbed.

[0013] In the vehicle seat, the cutout may have at least two sides, one of which may be longer than the other. When an excessive load is applied, the longer side abuts against the other member, thereby reliably suppressing displacement of the seat body.

[0014] In the vehicle seat, the notch formed in the seat frame side member may have an upper side and a lower side, and the length of the upper side may be longer than the length of the lower side. When an excessive load is applied, the longer upper edge abuts against the rail side member, thereby reliably suppressing displacement of the seat body.

[0015] In the vehicle seat, when a predetermined load is applied to the seat body, the upper and lower edges of the notch may abut against the rail-side member. By having the upper and lower edges abut against the rail side members, movement can be efficiently suppressed with minimal displacement even when an excessive load is applied.

[0016] In the vehicle seat, the seat frame side member and the rail side member may be arranged with an equal gap between them in the vertical and width directions of the vehicle seat when the seat body is in a position moved forward from the rearmost position. By arranging the seat frame side members and the rail side members in a well-balanced manner, displacement of the seat body can be efficiently suppressed.

[0017] In the vehicle seat, at least one of the seat frame side member and the rail side member may have a J-shaped cross section. By forming the cross section in a J-shape, the rigidity of the area around the contact point can be improved, and displacement of the seat body can be more reliably suppressed.

[0019] In the vehicle seat, the seat body may have a seat back and a reclining mechanism that rotates the seat back in the front-rear direction of the vehicle seat, and the seat frame side member may be attached to the reclining mechanism. By attaching the seat frame side member to the reclining mechanism, which is relatively strong, displacement of the seat body can be more firmly suppressed.

[0020] In the vehicle seat, the seat frame side member and the rail side member may abut at a plurality of positions around the rotation center of the reclining mechanism when a predetermined load is applied to the seat body. By contacting at multiple positions, displacement of the seat body can be efficiently suppressed.

[0021] In the vehicle seat, the seat frame side member and the rail side member may abut against each other at a position outside and rearward of the center of rotation of the reclining mechanism when a predetermined load is applied to the seat body. Since the contact position is close to the input position of the excessive load and the starting point of the displacement, the displacement of the seat body is further suppressed. [Effects of the Invention]

[0022] When a predetermined load, such as a forward load during a collision, is applied to the seat body, the seat frame side member moves, causing the seat frame side member to come into contact with the rail side member, thereby suppressing displacement of the seat body. This simple structure makes it possible to suppress displacement due to excessive load during a collision. Since the first abutment surface of the seat frame side member and the second abutment surface of the rail side member abut in a state where they are arranged in an intersecting direction, when a load is applied to the seat body, the load can be reliably absorbed. It moves easily in tandem with the forward and backward movement of the slide rail, and can reliably suppress displacement of the seat body even when excessive load is applied. When an excessive load is applied, the longer side abuts against the other member, thereby reliably suppressing displacement of the seat body. When an excessive load is applied, the longer upper edge abuts against the rail side member, thereby reliably suppressing displacement of the seat body. By having the upper and lower edges abut against the rail side members, movement can be efficiently suppressed with minimal displacement even when an excessive load is applied. By arranging the seat frame side members and the rail side members in a well-balanced manner, displacement of the seat body can be efficiently suppressed. Furthermore, by forming the cross section of at least one of the seat frame side member and the rail side member into a J-shape, the rigidity of the area around the contact point can be improved, and displacement of the seat body can be more reliably suppressed. The first hook-shaped portion and the second hook-shaped portion, which have cutouts formed therein extending in the front-rear direction, engage with each other, thereby making it possible to suppress displacement of the seat body with a simple structure. By attaching the seat frame side member to the reclining mechanism, which is relatively strong, displacement of the seat body can be more firmly suppressed. Furthermore, by contacting at a plurality of positions, displacement of the seat body can be efficiently suppressed. Furthermore, since the contact position is close to the input position of the excessive load and the starting point of the displacement, the displacement of the seat body is further suppressed. [Brief explanation of the drawings]

[0023] [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. 2 is an explanatory diagram showing an enlarged view of a portion of the vehicle seat. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 4 is a cross-sectional view taken along line VV in FIG. [Figure 6] 10A and 10B are explanatory diagrams showing a state when a load is applied to the seat. [Figure 7] 10A and 10B are explanatory diagrams showing other examples of the seat frame-side bracket and the rail-side bracket. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7. [Figure 9] 10A and 10B are explanatory diagrams showing other examples of the seat frame-side bracket and the rail-side bracket. [Figure 10] 10A and 10B are explanatory diagrams showing other examples of the seat frame-side bracket and the rail-side bracket. DETAILED DESCRIPTION OF THE INVENTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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 an occupied state, unless otherwise specified.

[0029] 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. In Fig. 1, a portion of the vehicle seat S is shown with a trim cover T removed for convenience of illustration.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] A pair of slide rails 4 are provided on the left and right sides of the lower portion of the seat body Sh. The pair of slide rails 4 allow the seat body Sh to be attached to the vehicle floor in a state where it can slide back and forth.

[0036] 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.

[0037] 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.

[0038] 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, together with the side portions of the pipe frame 18, constitute the left and right ends of the seatback frame 10. 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 centers of the side portions of the pipe frame 18 and are attached to the base frame 12 so as to be rotatable.

[0039] The base frame 12 is connected at its upper portion to the backside frame 11 via a reclining mechanism 19. The base frame 12 is also fixed at its lower portion to the upper rail 6 of the slide rail 4.

[0040] The pair of 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 general slide rail mechanism). The slide rails 4 include lower rails 5 fixed to the vehicle floor and 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.

[0041] The slide rail 4 also includes a locking device (not shown) that locks the upper rail 6 from sliding. Normally, the upper rail 6 is locked by the locking device in a state that prevents it from sliding, but when the occupant performs a predetermined operation, it is unlocked and becomes slidable. The position locked by the locking device may be anywhere within the range in which the slide rail 4 allows sliding movement. For example, when the seat body Sh is in the forwardmost position of the slide rail 4, the locking device can lock the upper rail 6 at the forwardmost position to prevent it from sliding. Since a general device for locking the upper rail 6 can be used for the locking device, a detailed description thereof will be omitted.

[0042] The seat frame side bracket 30 and the rail side bracket 40 provided on the vehicle seat S of this embodiment will be described with reference to FIGS.

[0043] The seat frame side bracket 30 (an example of a seat frame side member) is a member provided on the seat frame F. More specifically, the seat frame side bracket 30 is disposed at the lower end of the seat back frame 10 of the seat frame F, and is provided on the outer end of the reclining mechanism 19 that rotates the seat back 1 in the front-rear direction.

[0044] The rail-side bracket 40 (an example of a rail-side member) is a member provided on the slide rail 4. More specifically, the rail-side bracket 40 is provided on the outer side of the lower rail 5 of the slide rail 4 so as to be located near the seat-frame-side bracket 30 when the seat body Sh is slid forward by the slide rail 4 to be at its forward-most position (an example of a position moved forward from the rearmost position). In Fig. 3, the position of the seat-frame-side bracket 30 when the seat body Sh is at its forward-most position is indicated by a solid line, and the position of the seat-frame-side bracket 30 when the seat body Sh is at its rearmost position is indicated by a two-dot chain line.

[0045] The seat-frame-side bracket 30 has a first hook-shaped portion 32 with a notch 33 formed at its lower end and extending in the front-rear direction of the vehicle seat S. The rail-side bracket 40 has a second hook-shaped portion 42 with a notch 43 formed at its upper end and extending in the front-rear direction of the vehicle seat S (see FIG. 5 ). In this embodiment, when the seat main body Sh slides forward, the first hook-shaped portion 32 of the seat-frame-side bracket 30 and the second hook-shaped portion 42 of the rail-side bracket 40 are arranged to engage with each other as shown in FIGS. 3 to 5 . However, when the seat main body Sh slides to the front-most position, gaps K1, K2, K3, M1, M2, and M3 are present between the seat-frame-side bracket 30 and the rail-side bracket 40, and the seat-frame-side bracket 30 and the rail-side bracket 40 are not in direct contact with each other. Providing gaps rather than direct contact prevents the generation of abnormal noise when the seat main body Sh slides.

[0046] In recent years, child seats have come to be fixed to vehicle seats S using the ISOFIX mechanism, which consists of lower anchors 51 (see Figure 2) and tether anchors 52 (see Figure 2). Because the child seat is directly fixed to the seat back 1 by the lower anchors 51 and tether anchors 52, when an excessive impact load is input from the front due to a collision or the like, the child seat moves forward due to inertial force, which pulls the seat back 1, causing it to tilt in the direction of arrow B in Figure 2. Furthermore, when an excessive load due to a collision or the like is applied to the seat back 1, the upper rail 6 is displaced forward so as to lift up.

[0047] If a vehicle collision occurs with the seat body Sh in its forward-most position, and a child seat is attached to the vehicle seat S as described above, an excessive forward load (stress) is applied, causing the seat body Sh to tend to tilt forward. At this time, as shown in FIG. 6 , the seat frame side bracket 30 attached to the reclining mechanism 19 rotates in the direction of arrow B, causing the first hook portion 32 of the seat frame side bracket 30 to come into contact with the second hook portion 42 of the rail side bracket 40. The abutment of the first hook portion 32 suppresses the rotational movement (displacement) of the seat body Sh. This simple structure of interlocking two members can suppress displacement of the seat body Sh due to the excessive load during a collision.

[0048] The seat frame side bracket 30 and the rail side bracket 40 will now be described in more detail. The seat frame-side bracket 30 and the rail-side bracket 40 are arranged close to each other when the seat body Sh is in its forward-most position, and have a first contact surface 31 and a second contact surface 41 that are arranged opposite each other with gaps K3 and M3 between them (see FIGS. 3 and 5). As shown in FIG. 5, the first contact surface 31 and the second contact surface 41 are arranged so as to intersect each other at a right angle. When a load is applied to the seat body Sh in the direction of arrow A, the seat frame side bracket 30 moves forward, and the first abutment surface 31 and the second abutment surface 41 come into contact. Because the first abutment surface 31 and the second abutment surface 41 are arranged in directions that intersect with each other, the seat frame side bracket 30 and the rail side bracket 40 can abut even if they are misaligned in the vertical or width direction. This allows the seat body Sh to reliably withstand the load.

[0049] Furthermore, the notch 33 formed in the first hook-shaped portion 32 of the seat-frame-side bracket 30 has an upper side 33a and a lower side 33b. The length L1 of the upper side 33a is longer than the length L2 of the lower side 33b. When a load is applied to the seat main body Sh in the direction of arrow B, as shown in FIG. 6, the seat-frame-side bracket 30 rotates, and the upper side 33a abuts against the upper surface 42a of the second hook-shaped portion 42 of the rail-side bracket 40, and the lower side 33b abuts against the lower surface 42b of the second hook-shaped portion 42. By abutting at two points (abutment points T1 and T2), movement of the seat-frame-side bracket 30 is efficiently suppressed with minimal displacement.

[0050] In this embodiment, the notch 43 of the rail-side bracket 40 has an outer side 43a and an inner side 43b. The length L4 of the inner side 43b is longer than the length L3 of the outer side 43a. When a load is applied in the width direction of the vehicle, the seat main body Sh moves in the width direction or rotates around an axis in the up-down direction. This causes the seat-frame-side bracket 30 to move in the width direction and abut against the outer side 43a and inner side 43b of the rail-side bracket 40. This efficiently suppresses the movement of the seat main body Sh with minimal displacement.

[0051] Furthermore, when the seat body Sh is in its forwardmost position, gaps are provided in the vertical direction of the seat, and the sizes of these gaps K1 and K2 (intervals KL1 and KL2) are set to be approximately equal (see FIG. 4). Also, gaps M1 and M2 are provided in the width direction of the seat, and the sizes of these gaps M1 and M2 (intervals ML1 and ML2) are set to be approximately equal (see FIG. 5). By providing equal gaps, the seat frame-side bracket 30 and the rail-side bracket 40 are positioned in a balanced manner, thereby efficiently suppressing displacement of the seat body Sh. Note that the length L5 over which the seat frame-side bracket 30 faces the rail-side bracket 40 and the length L6 over which the rail-side bracket 40 faces the seat frame-side bracket 30 are set to be sufficiently longer than the gaps K1, K2, M1, and M2 (see FIG. 5).

[0052] As described above, the seat body Sh has a reclining mechanism 19 that rotates the seat back 1 in the front-to-rear direction of the vehicle seat S. The seat frame side bracket 30 is attached to the outer end of the reclining mechanism 19. When a load is applied to the seat body Sh, the seat frame side bracket 30 abuts at multiple abutment points T1, T2 around the rotation center 19a of the reclining mechanism 19, as shown in FIG. 6. By abutting at multiple points and providing the seat frame side bracket 30 on the reclining mechanism 19, displacement of the seat body Sh can be more firmly suppressed. At this time, the seat body Sh makes contact at a position (contact point T2) outside and rearward of the rotation center 19a of the reclining mechanism 19. Since the contact point T2 is close to the input position of the excessive load and the starting point of the displacement, the displacement of the seat body Sh can be further suppressed.

[0053] 1 to 6 is provided on the slide rail 4 so as to be able to come into contact with the seat frame bracket 30 when the seat body Sh is at the frontmost position. However, this is just one example, and the slide rail 4 may be provided at any position as long as it is moved forward from the rearmost position of the slide movement of the slide rail 4.

[0054] 7 to 10, modified examples of the seat-frame-side bracket 30 and the rail-side bracket 40 will be described. The first hook-shaped portion 32 and the second hook-shaped portion 42 of the seat-frame-side bracket 30 and the rail-side bracket 40 in FIGS. 1 to 6 are formed to interlock in the front-to-rear direction, but the first hook-shaped portions 132A, 132B and second hook-shaped portions 142A to 142D of the seat-frame-side brackets 130A, 130B and rail-side brackets 140A to 140D shown in FIGS. 7 to 10 are formed to interlock in the up-down direction. Note that in FIGS. 7, 9, and 10, the positions of the seat-frame-side brackets 130A, 130B when the seat main body Sh is in its forward-most position are indicated by solid lines, and the positions of the seat-frame-side brackets 130A, 130B when the seat main body Sh is in its rearmost position are indicated by two-dot chain lines.

[0055] As shown in Fig. 8, the cross section of the first hook-shaped portion 132A of the seat-frame-side bracket 130A is J-shaped, and the cross section of the second hook-shaped portion 142A of the rail-side bracket 140A is inverted J-shaped. The first hook-shaped portion 132A and the second hook-shaped portion 142A are arranged with a gap between them, so that when an excessive load is applied, for example, the first abutment surface 131 and the second abutment surface 141 come into contact with each other, thereby suppressing displacement of the seat main body Sh. The J-shaped cross section can improve the rigidity of the abutting points, for example, the main deformation portions of the first abutment surface 131 and the second abutment surface 141, making them less likely to deform when they come into contact, thereby more reliably suppressing displacement of the seat main body Sh.

[0056] 7, a rail-side bracket 140B having the same shape as the rail-side bracket 140A may be disposed at a position behind the rail-side bracket 140A, for example, at the center of the sliding range. By installing multiple rail-side brackets 140A, 140B on the slide rail 4, multiple second hook portions 142A, 142B can be provided that serve as abutment positions for abutting against the first hook portion 132A of the seat-frame-side bracket 130A. By disposing multiple brackets, even when the seat main body Sh is not in the foremost position, the seat-frame-side bracket 130A can abut against the rail-side bracket 140B when an excessive load is applied, thereby suppressing displacement of the seat main body Sh. The rail-side brackets 140A and 140B may be installed at any position as long as they are moved forward from the rearmost position. Also, another rail-side bracket may be provided between the two rail-side brackets 140A and 140B. By providing multiple rail-side brackets 140A and 140B on the slide rail 4 in this manner, the seat-frame-side bracket 130A can abut or engage with the rail-side brackets 140A and 140B at multiple divided positions.

[0057] 9, a rail-side bracket 140C longer in the front-to-rear direction than the seat-frame-side bracket 130A may be provided on the lower rail 5 of the slide rail 4. In the rail-side bracket 140C, a second hook portion 142C that abuts against the first hook portion 132A of the seat-frame-side bracket 130A is formed as two separate pieces. Specifically, the second hook portion 142C is divided so as to be able to abut at two positions: the front-most position and an intermediate position behind the position. By providing the rail-side bracket 140C having multiple separate second hook portions 142C on the slide rail 4, the seat-frame-side bracket 130A can abut or engage with the rail-side bracket 140C at multiple separate positions. Furthermore, by dividing the second hook portion 142C of the rail-side bracket 140C, a single member can be used to abut at multiple positions, thereby reducing the number of parts. The second hook portion 142C has a cross section formed in an inverted J shape, similar to the second hook portion 142A shown in FIG.

[0058] The seat-frame-side bracket 130A shown in FIG. 7 is formed to have equal lengths in the front and rear directions with a line including the rotation center 19a of the reclining mechanism 19 as a symmetrical axis, but the first hook-shaped portion 132B of the seat-frame-side bracket 130B and the second hook-shaped portion 142D of the rail-side bracket 140D shown in FIG. 10 are formed to extend rearward from the rotation center 19a. Furthermore, the length L8 of the second hook-shaped portion 142D of the rail-side bracket 140D is formed to be even longer than the length L7 of the first hook-shaped portion 132B of the seat-frame-side bracket 130B. By extending the second hook-shaped portion 142B rearward, when an excessive load is applied, it is closer to the input position and the starting point of the displacement, thereby further suppressing the displacement of the seat main body Sh. Furthermore, by making the length L8 of the second hook portion 142D longer than the length L7 of the first hook portion 132B, the displacement of the seat body Sh can be suppressed not only at the forwardmost position of the sliding movement but also in any range including the forwardmost position. The first hook portion 132B has a J-shaped cross section similar to the first hook portion 132A shown in FIG. 8, and the second hook portion 142D has an inverted J-shaped cross section similar to the second hook portion 142A shown in FIG. 8.

[0059] The vehicle seat S of this embodiment has been described above using the drawings. Note that the above description has been given for the case where the seat back 1 is in an upright position (a state where a seat is available for sitting). However, the suppression of displacement by the seat frame side bracket 30 and the rail side bracket 40 can suppress displacement not only when the seat back 1 is upright, but also when the seat back 1 is folded forward and positioned to overlap the seat cushion 2 (cargo bed state). By simply adding a member, it is possible to suppress the reclining mechanism 19 from collapsing toward the center of the seat or moving upward even when an excessive load is applied. [Explanation of symbols]

[0060] 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 Front seat frame 10 Seat back frame 11 Backside Frame 12 Base Frame 18 Pipe Frame 19 Reclining mechanism 19a Center of rotation 20 Seat cushion frame 21 Cushion side frame 22 Back Panel 30, 130A, 130B Seat frame side bracket (seat frame side component) 31, 131 First contact surface 32, 132A, 132B First hook 33 Notch 33a Top 33b bottom edge 40, 140A, 140B, 140C, 140D Rail side bracket (rail side component) 41, 141 Second contact surface 42, 142A, 142B, 142C, 142D Second hook 42a Top side 42b Bottom side 43 Notch 43a outer edge 43b Inside side 51 Roaanka 52 Tether Anchor K1, K2, K3, M1, M2, M3 Gap KL1, KL2, ML1, ML2 interval T1, T2 contact points

Claims

1. A vehicle seat, The seat body, a seat frame that forms the framework of the seat body; a slide rail that slides the seat body along the front-rear direction of the vehicle seat; a seat frame side member provided on the seat frame; a rail side member that is located near the seat frame side member and is provided on the slide rail with a gap between it and the seat frame side member when the seat body is at a position moved forward from the rearmost position of the sliding movement, When a predetermined load is applied to the seat main body, the seat frame side member moves, and a first abutment surface extending in the vertical direction of the seat frame side member abuts against a second abutment surface extending in the horizontal direction of the rail side member, A vehicle seat, characterized in that both the seat frame side member and the rail side member have hook-shaped portions in which notches extending in the front-rear direction of the vehicle seat are formed.

2. A vehicle seat, The seat body, a seat frame that forms the framework of the seat body; a slide rail that slides the seat body along the front-rear direction of the vehicle seat; a seat frame side member provided on the seat frame; a rail side member that is located near the seat frame side member and is provided on the slide rail with a gap between it and the seat frame side member when the seat body is at a position moved forward from the rearmost position of the sliding movement, When a predetermined load is applied to the seat main body, the seat frame side member moves, and a first abutment surface extending in the vertical direction of the seat frame side member abuts against a second abutment surface extending in the horizontal direction of the rail side member, The vehicle seat is characterized in that the seat frame side member and the rail side member each have a notch formed therein extending in the fore-and-aft direction of the vehicle seat, and have a first hook portion and a second hook portion that engage with each other when the seat body is in a position moved forward from the rearmost position.

3. The vehicle seat according to claim 1 or 2, characterized in that the first abutment surface of the seat frame side member and the second abutment surface of the rail side member are arranged opposite each other across the gap and are arranged so as to intersect each other at right angles.

4. 4. The vehicle seat according to claim 1, wherein the notch has at least two sides, and one of the two sides has a length longer than the other.

5. 5. The vehicle seat according to claim 1, wherein the notch formed in the seat frame side member has an upper side and a lower side, and the length of the upper side is longer than the length of the lower side.

6. 6. The vehicle seat according to claim 5, wherein when a predetermined load is applied to the seat body, the upper and lower sides of the notch abut against the rail-side member.

7. 7. A vehicle seat according to claim 1, wherein the seat frame side member and the rail side member are arranged with a gap of equal distance in the vertical and width directions of the vehicle seat when the seat body is in a position moved forward from the rearmost position.

8. 6. The vehicle seat according to claim 1, wherein at least one of the seat frame side member and the rail side member has a J-shaped cross section.

9. the seat body has a seat back and a reclining mechanism that rotates the seat back in the front-rear direction of the vehicle seat, 9. The vehicle seat according to claim 1, wherein the seat frame side member is attached to the reclining mechanism.

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