JP2021059155A - Seat for vehicle - Google Patents

Abstract

To provide a seat for a vehicle which inhibits displacement caused by an excess load occurring during collision.SOLUTION: A seat for a vehicle includes: a seat body: slide rails 4 which have lower rails 5 and upper rails 6 supported in a such a way so as to be movable relative to the lower rails and which allow the seat body to slide along an anteroposterior direction of the seat for the vehicle; and base frames each having a connection part connecting the seat body with the upper rail and an extension part 13b extending from the connection part to a front side of the seat for the vehicle. Each extension part is provided so that a part of a lower surface of the extension part and parts of upper surfaces of members 31, 32 for rails, forming the upper rail, contact with each other when at least a predetermined load is exerted thereon. The extension part and the members for the rails have a regulation part 7 which regulates movement of the base frame in a width direction of the seat for the vehicle.SELECTED DRAWING: Figure 6

Description

The present invention relates to a vehicle seat, and more particularly to a vehicle seat in which displacement at the time of a collision is suppressed.

As a mechanism for attaching a child seat to a vehicle such as an automobile, there is a mechanism defined by an international standard called ISOFIX. For example, as described in Patent Document 1, in the ISOFIX mechanism, a child seat connector is connected to a mounting bracket called a lower anchor provided on the seat to fix the child seat to the seat.

In the prior art described in Patent Document 1, the lower portion of the child seat is attached to the seat by a locking arm. For example, although not shown, the lower anchor is configured as a U-shaped mounting bracket attached to pipes spanning the left and right sides of the seat cushion frame. By attaching the child seat to the seat back and engaging the tether anchor with the back surface of the seat back, the child seat and the seat back are integrally fixed. The lower anchor functions only as a fixing part of the child seat, and it is necessary to separately secure the rigidity of the seat frame and take measures against deformation by the mechanism and material of the seat frame.

When an excessive impact load is input from the front due to a frontal collision, etc. with the child seat integrally attached to the seat back using a tether anchor, the child seat and seat cushion are moved by the inertial force acting on the child seat and seat cushion. A force is generated to move it forward. Therefore, a load is applied to the seat back that is integrally fixed to the child seat, and the seat back may be inclined forward and largely displaced.

Patent Document 2 discloses a structure for preventing the seat cushion from coming off due to a force acting at the time of a frontal collision. Specifically, the peripheral edge of the engagement hole on the rear side of the pair of brackets erected at the rear of the support frame is securely locked by the locking surface of the guide hook, and the seat cushion moves forward in the event of a collision. Is configured to be locked by a guide hook.

Japanese Patent No. 5248093 Japanese Patent No. 6544636

In the invention disclosed in Patent Document 2, although the forward movement of the seat cushion is locked by the guide hook, the load applied to the seat back is not reduced, so that the seat back can be tilted forward and largely displaced in the event of a collision. There was sex.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle seat in which displacement due to an excessive load at the time of a collision is suppressed.

The subject is a vehicle seat, which has a seat body, a lower rail, and an upper rail that is supported so as to be relatively movable with respect to the lower rail, and the seat body is provided along the front-rear direction of the vehicle seat. A base frame having a slide rail for sliding and moving, a connecting portion for connecting the seat body and the upper rail, and an extending portion extending from the connecting portion toward the front of the vehicle seat. The extension portion is provided so that a part of the lower surface of the extension portion and a part of the upper surface of the rail member constituting the upper rail come into contact with each other when at least a predetermined load is applied. The extension portion and the rail member are solved by having a regulation portion that regulates the movement of the base frame in the width direction of the vehicle seat.

According to the vehicle seat described above, the base frame comprises an extension that extends forward from its connection, the extension being a portion of the lower surface of the extension and the upper surface of the rail member. It is provided so as to come into contact with a part of the above when at least a predetermined load is applied. As a result, the rotation of the base frame is suppressed, and the displacement of the seat body connected to the base frame is also suppressed.
Further, since the movement of the base frame in the width direction is restricted by the regulating portion, the seat body is surely supported by the base frame, and the displacement of the seat body can be suppressed.

In the above-mentioned vehicle seat, when the predetermined load is not applied, it is preferable that a gap is provided between a part of the lower surface of the extending 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 the contact between the extension portion and the rail member.

In the above-mentioned vehicle seat, the restricting portion is configured by having an insertion hole formed in either one of the extension portion and the rail member, and the other having a protruding portion inserted into the insertion hole. It is good.
With the above configuration, the displacement of the base frame in the width direction is suppressed.

In the vehicle seat, it is preferable that a plurality of 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.

In the vehicle seat, a gap is formed between the inner wall surface of the insertion hole and the side portion of the protrusion, and when the predetermined load is applied, the side portion of the protrusion and the insertion It is preferable that the inner wall surface of the hole is in contact with the inner wall surface.
With the above configuration, it is possible to suppress the amount of displacement in the width direction and suppress the generation of abnormal noise when a predetermined load is not applied.

In the vehicle seat, the slide rail may have a lock mechanism for restricting the movement of the upper rail, and the protrusion may be provided on the lock mechanism.
With the above configuration, since the protruding portion is provided in the lock mechanism, the protruding portion can be provided without adding a new member, and the displacement in the width direction can be efficiently suppressed.

In the vehicle seat, the connection portion of the base frame may be fixed to the rear portion of the upper rail, and the extension portion may be provided at a position where the lock mechanism and the lock mechanism are vertically overlapped with each other in a side view. The extending portion may be provided with a space at a position where it vertically overlaps with the locking mechanism in a side view.
With the above configuration, displacement can be suppressed in a compact arrangement.

In the vehicle seat, it is preferable that a notch is formed between the connecting portion and the extending portion so as to avoid the locking mechanism.
With the above configuration, the interference between the base frame and the locking mechanism is eliminated, and the extension portion can be arranged compactly.

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

In the vehicle seat, the base frame may have a flange portion at the outer peripheral end portion, and the extension portion may be formed in a U-shaped cross section that opens inward 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 extending portion is improved.

In the vehicle seat, a reclining mechanism that rotates the seat body at the connection portion of the base frame and a rear bracket that connects the seat body and the upper rail at a position opposite to the base frame. It is preferable to have two connecting members for connecting the base frame and the rear bracket at positions before and after sandwiching the reclining mechanism.
The above configuration improves the rigidity of the base frame.

According to the vehicle seat of the present invention, the base frame includes an extension portion extending forward from the connection portion thereof, and the extension portion includes a part of the lower surface of the extension portion and the upper surface of the rail member. A part of the above is provided so as to come into contact with each other when at least a predetermined load is applied. As a result, the rotation of the base frame is suppressed, and the displacement of the seat body connected to the base frame is also suppressed. Further, since the movement of the base frame in the width direction is restricted by the regulating portion, the seat body is surely supported by the base frame, and the displacement of the seat body can be suppressed.
Further, according to the vehicle seat of the present invention, it is possible to suppress the generation of abnormal noise due to the contact between the extension portion and the rail member.
Further, according to the vehicle seat of the present invention, the displacement of the base frame in the width direction is suppressed.
Further, according to the vehicle seat of the present invention, the displacement in the width direction can be efficiently suppressed by forming a plurality of insertion holes in the front-rear direction.
Further, according to the vehicle seat of the present invention, it is possible to suppress the displacement amount in the width direction and suppress the generation of abnormal noise when a predetermined load is not applied.
Further, according to the vehicle seat of the present invention, since the protruding portion is provided in the lock mechanism, the protruding portion can be provided without adding a new member, and the displacement in the width direction can be efficiently suppressed. Can be done.
Further, since the extension portion is supported with a space at a position where it overlaps with the lock mechanism in a side view, displacement can be suppressed in a more compact arrangement.
In addition, since a notch is formed between the connecting portion and the extending portion so as to avoid the locking mechanism, interference between the base frame and the locking mechanism is eliminated, and the extending portion can be arranged compactly. it can.
Further, since the base frame has a bulging portion, the rigidity of the base frame is improved.
Further, since the base frame has a flange portion at the outer peripheral end portion and the extension portion is formed in a U-shaped cross section that opens inward in the width direction, the rigidity of the base frame is improved and the rigidity of the extension portion is improved. Also improves.
Further, by having two connecting members for connecting the base frame and the rear bracket at the positions before and after sandwiching the reclining mechanism, the rigidity of the base frame is improved.

It is a perspective view which shows the appearance of the vehicle seat which concerns on one Embodiment of this invention. It is a perspective view of the seat frame provided in the vehicle seat. It is a side view of a vehicle seat. It is an enlarged view which shows the part A of FIG. It is a schematic diagram which shows the state of the vehicle seat when an excessive load is applied. It is a perspective view seen from the X direction of FIG. 1 which shows the connection state of a base frame and a slide rail. It is a perspective view of the rail bracket which constitutes a base frame. FIG. 6 is a cross-sectional view taken along the line VIII-VIII of FIG. FIG. 6 is a cross-sectional view taken along the line IX-IX of FIG. It is sectional drawing along the X-ray line of FIG. It is a figure which shows another example of the protrusion.

Hereinafter, the configuration of the vehicle seat according to the embodiment of the present invention will be described with reference to the drawings. However, the embodiments described below are for facilitating the understanding of the present invention and do not limit the present invention. That is, the present invention can be modified and improved without deviating from the gist thereof, and it goes without saying that the present invention includes an equivalent thereof.
Further, in the following description, the content relating to the material, shape and size of the sheet component is merely one of specific examples, and does not limit the present invention.

In the following, a vehicle seat mounted on a vehicle will be given as an example of a vehicle seat, and a configuration example thereof will be described. However, the present invention is not limited to vehicle seats mounted on ground-based vehicles having wheels such as automobiles and railroads, and for example, seats mounted on aircraft and ships moving outside the ground. Can be applied.

Further, in the following description, the "front-rear direction" is the front-rear direction of the vehicle seat (in other words, the front-rear direction of the seat body), and is a direction that coincides with the traveling direction when the vehicle is traveling. Further, the "seat width direction" is the width direction of the vehicle seat (in other words, the width direction of the seat body), which is the direction corresponding to the left-right direction seen from the occupant seated on the vehicle seat. Further, the "vertical direction" is a vertical direction of the vehicle seat, and is a direction that coincides with the vertical direction when the vehicle is traveling on a horizontal plane.

In addition, the "outside of the vehicle" in the seat width direction means the one closer to the outside of the vehicle body (for easy understanding, the side closer to the nearest door), and the "inside of the vehicle" means the one closer to the inside of the vehicle body (understood). Easy means the side away from the nearest door).
Further, in the following description, "rotation" means a rotation operation about an axis along the seat width direction, unless otherwise specified.

The shape, position, posture, and the like of each part of the vehicle seat described below will be described assuming a case where the vehicle seat is in a seated state, which will be described later, unless otherwise specified.

<Vehicle seat S>
The basic configuration of the vehicle seat (hereinafter referred to as the vehicle seat S) according to the present embodiment will be described with reference to FIG. FIG. 1 is a perspective view of the vehicle seat S. A part of the vehicle seat S in FIG. 1 is shown in a configuration in which the trim cover T is removed for convenience of illustration.

The vehicle seat S is a seat that is placed on the vehicle body floor and on which the occupants of the vehicle are seated. In the present embodiment, the vehicle seat S is used as a rear seat corresponding to the rear seat of the vehicle. However, the present invention is not limited to this, and the vehicle seat S can also be used as a front seat, and is also used as a second row middle seat or a third row in a vehicle having three rows of seats in the front-rear direction. It can also be used as a rear seat.

As shown in FIG. 1, the vehicle seat S has a seat main body Sh that forms a main body portion thereof. As shown in FIG. 1, the seat body Sh is arranged on the seat back 1, which is a backrest portion that supports the back of the seated person, the seat cushion 2, which is the seating portion that supports the buttocks of the seated person, and the upper part of the seat back 1. The headrest 3 that supports the seated person's head is the main component. The seat back 1 and the seat cushion 2 are connected so as to sandwich the reclining mechanism 19 described later. The seat back 1 is rotatably attached to the vehicle body floor via a base frame 12 described later.

As shown in FIG. 2, a seat frame F is provided in the vehicle seat S, and the seat frame F is a seat back frame 10 which is a frame of the seat back 1 and a frame of the seat cushion 2. It is composed of a seat cushion frame 20 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.

The seat back 1 and the seat cushion 2 are configured by providing the pad member P and the trim cover T on the outside of the seat back frame 10 and the seat cushion frame 20. The pad member P is a urethane base material molded 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.

Further, the rear end portion of the seat cushion 2 is connected to the side portion 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 portion of the seat cushion 2 and the lower end portion of the seat back 1. The cushion side frame 21 is attached to the seat back 1 in a rotatable state. As a result, the seat cushion 2 can rotate together with the seat back 1.

Further, a slide rail 4 described later is installed at the lower part of the seat body Sh. With the slide rail 4, the seat body Sh is attached to the vehicle body floor in a state where it can slide and move in the front-rear direction.

Further, the seat body Sh can be stored in a folded state on the storage floor formed in front of the seat body Sh. The storage floor is a concave shape formed by recessing a part of the vehicle body floor (specifically, a portion of the vehicle body floor that is located in front of the seat body Sh when the seat body Sh is seated) downward. It's a space.

As shown in FIG. 2, the seat frame F mainly includes a seat back frame 10 that forms the skeleton of the backrest portion of the seat frame F and a seat cushion frame 20 that forms the skeleton of the seating portion of the seat frame F. ..
The seat back frame 10 mainly includes a pipe frame 18 made of a pipe processed into a square frame shape, a back panel 22, and a back side frame 11.

The back side frame 11 is a frame that extends in the vertical direction and is attached to the left and right side portions of the pipe frame 18. In other words, the backside frame 11 is a frame that is arranged outside the seat of the pipe frame 18 and constitutes the left and right end portions of the seat back frame 10 together with the side portions of the pipe frame 18. The backside frame 11 is a U-shaped plate-shaped frame having a cross section opened toward the inside of the seat. The upper portion of the back side frame 11 is welded to the central portion of the side portion of the pipe frame 18, and is rotatably attached to the base frame 12 described later.

The base frame 12 is connected to the backside frame 11 at its upper portion via a reclining mechanism 19. Further, the base frame 12 is bolted to the upper rail 6 of the slide rail 4 at the lower portion thereof (see FIGS. 3 and 4).

The slide rail 4 is a device for sliding and moving the seat body Sh along the front-rear direction, and has a known structure (a structure of a general slide rail mechanism). The slide rail 4 includes a pair of lower rails 5 fixed on the vehicle body floor and a pair of upper rails 6 that can slide and move with respect to the lower rails 5 (see FIGS. 1 and 2). The upper rail 6 is slidable with respect to the lower rail 5 fixed to the vehicle body. Then, the seat back frame 10 is attached to the upper rail 6 via the base frame 12, and the seat back frame 10 can be moved back and forth with respect to the lower rail 5 integrally with the upper rail 6. Therefore, the seat body Sh attached to the upper rail 6 moves back and forth as the upper rail 6 slides.

As shown in FIG. 6, the slide rail 4 includes a lock device 30 (an example of a lock mechanism) that locks the slide movement of the upper rail 6, and a cable (not shown) that unlocks the lock device 30. The lock device 30 is provided with a lock bracket 31 and a cable bracket 32 for holding the cable.

Normally, the upper rail 6 is locked by the lock device 30 in a state where it cannot slide and move, and when the occupant performs a predetermined operation, it is unlocked and becomes a state where it can slide and move. More specifically, an operating member (not shown) is connected to the locking device 30 via a cable. As for the lock device 30, since a general device for locking the upper rail 6 can be used, detailed description thereof will be omitted. Then, when the operating member is operated, the cable is towed, and as a result, the locking device 30 operates so as to unlock the upper rail 6.

<Base frame>
The base frame 12 will be described in detail with reference to FIGS. 4 to 6. As described above, the base frame 12 is a member that connects the lower portion of the back side frame 11 and the upper rail 6. The base frame 12 is composed of a rail bracket 13 connected to the upper rail 6 and a connecting bracket 14 connected to the backside frame 11. As shown in FIG. 4, the rail bracket 13 and the connecting bracket 14 are fastened and integrated with three bolts 17.

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

In the vehicle seat S of the present embodiment, the lower surface 13e of the extending portion 13b of the rail bracket 13 and the upper surfaces of the lock bracket 31 and the cable bracket 32 which are rail members constituting the upper rail 6 (end surface 31b shown in FIG. 9). , 32b) are provided with a gap L. The size of the gap L is about 1.5 mm, which is narrower than the wall thickness J (about 2.6 mm) of the rail bracket 13. When a predetermined load is applied, the rail bracket 13 rotates so that the lower surface 13e of the extending portion 13b comes into contact with the end faces 31b and 32b of the lock bracket 31 and the cable bracket 32.
The lower surface 13e of the extending portion 13b and the end faces 31b and 32b of the lock bracket 31 and the cable bracket 32 may be provided so as to come into contact with each other in a normal time when no load is applied.

As shown in FIG. 3, in recent years, the child seat 40 has been fixed to the vehicle seat S by the lower anchor 41 (see FIG. 2) and the tether anchor 42 (see FIG. 2), which are ISOFIX mechanisms. Since the child seat 40 is directly fixed to the seat back 1, when an excessive impact load is input 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 and is pulled by the seat. The back 1 inclines in the direction of arrow B. Further, when an excessive load due to a collision or the like is applied to the seat back 1, the upper rail 6 is displaced in the front side so as to be lifted. At this time, the extending portion 13b of the base frame 12 connected to the back side frame 11 abuts on the end faces 31b and 32b of the lock bracket 31 and the cable bracket 32 to support the seat back frame so as not to rotate in the B direction. The displacement of 10 can be suppressed. As a result, the displacement of the seat body Sh is also suppressed.

Further, the extending portion 13b, the lock bracket 31 and the cable bracket 32 are provided with a regulating portion 7 for restricting the movement of the base frame 12 to the outside in the width direction (direction of arrow D in FIG. 6). In the present embodiment, as shown in FIGS. 6 and 8, the regulating portion 7 includes an insertion hole 13d formed in the extending portion 13b, and protruding portions 31a and 32a provided in the lock bracket 31 and the cable bracket 32. The protrusions 31a and 32a are inserted into the insertion holes 13d to regulate the movement in the width direction. In the present 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.

As described above, when a predetermined load is applied at the time of a collision, the extension portion 13b and the end faces 31b and 32b of the lock bracket 31 and the cable bracket 32 come into contact with each other to stop the rotation of the base frame 12 and stop the rotation of the seat back. The extending portion 13b supports the frame 10 so that the frame 10 is not displaced. At that time, the rail bracket 13 tries to be deformed outward in the width direction while the extending portion 13b is in contact with the rail bracket 13. The side surfaces of the protruding portions 31a and 32a shown in FIGS. 6 and 8 to 10 come into contact with the inner wall surface of the insertion hole 13d, so that the extension portion 13b can be stopped from moving outward in the width direction. As a result, the displacement of the rail bracket 13 outward in the width direction can be suppressed.

The lower surface 13e of the extending portion 13b and the upper surface 31c of the lock bracket 31 are opposite 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. Further, in the present embodiment, the generation of abnormal noise is suppressed by having a gap L between the lower surface 13e of the extending portion 13b and the end surface 31b of the lock bracket 31.

In the present embodiment, the extending portion 13b is formed with two insertion holes 13d through which the protruding portions 31a and 32a are inserted in the front-rear direction. A plurality of protrusions 31a and 32a are provided on the lock bracket 31 and the cable bracket 32 according to the positions of the insertion holes 13d. By forming the insertion hole 13d in the front-rear direction, displacement in the width direction can be efficiently suppressed.
Further, in the present embodiment, the protruding portions 31a and 32a are provided by bending the end portion of the lock bracket 31 and the end portion of the cable bracket 32 into an L shape. The strength of the protruding portion is improved by forming it with two members. If the strength is not insufficient, the protrusions 31a and 32a may be formed on either one of the lock bracket 31 and the cable bracket 32.

As shown in FIG. 8, a gap K is formed between the inner wall surface of the insertion hole 13d and the protrusions 31a and 32a. When a predetermined load is applied, the lower surface 13e and the end faces 31b, 32b come into contact with each other, and then the protrusions 31a, 32a come into contact with the inner wall surface of the insertion hole 13d, and the rail bracket 13 moves outward in the width direction. To prevent. The presence of the gap K suppresses the generation of abnormal noise and facilitates assembly in which the protrusions 31a and 32a are inserted into the insertion holes 13d.

As shown in FIG. 6, the connecting portion 15 (bracket body 13a) of the base frame 12 is fixed to the rear portion of the upper rail 6 with bolts. Further, as shown in FIG. 4, the extension portion 13b of the rail bracket 13 has a space (gap M) at a position where it vertically overlaps with the lock device 30 in a side view (a view of the vehicle seat S viewed from the left). It is provided open. With this configuration, a more compact arrangement can be achieved.

Further, as shown in FIGS. 6 and 7, a notch 13f is formed in the rail bracket 13 between the bracket main body 13a and the extending portion 13b so as to avoid the locking device 30. By forming the notch 13f in this way, the interference between the rail bracket 13 and the lock device 30 is eliminated, and the extension portion 13b can be arranged more compactly.

As shown in FIGS. 4 and 8 to 10, the rail bracket 13 is formed so that the bulging portion 13c 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.

Further, as shown in FIG. 6, flange portions 13h and 14a are formed at the outer peripheral ends of the rail bracket 13 and the connecting bracket 14 constituting the base frame 12. By forming the flange portions 13h and 14a, the rigidity of the base frame 12 is improved. Further, as shown in FIG. 9, the flange portion 13h is also formed at the outer peripheral end portion of the extending portion 13b of the rail bracket 13 so that the vehicle seat S has a U-shaped cross section that opens inward in the width direction. It is formed. By forming the cross section in a U shape, the rigidity of the extending portion 13b is improved and the displacement of the seat back frame 10 is further suppressed.

Further, as shown in FIG. 7, a plurality of through holes 13i and 13k are formed on the side surface portion of the extending portion 13b of the rail bracket 13 in addition to the bolt hole 13g and the connecting pipe hole 13j. In particular, on the side surface portion of the bracket main body 13a, a through hole 13i is formed between the plurality of bolt holes 13g. By forming the through holes 13i and 13k on the side surface portion, the weight of the rail bracket 13 can be reduced.

Further, as shown in FIG. 2, a rear bracket 23 for connecting the lower portion (back side frame 11) of the seat back frame 10 and the upper rail 6 is provided at a position opposite to the base frame 12. 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 before and after sandwiching the reclining mechanism 19. By connecting with two connecting pipes 16, the rigidity of the seat back frame 10 is improved.
The connecting bracket 14 and the rail bracket 13 are fastened by bolts 17 at a position further forward of the connecting pipe 16 located on the front side of the two connecting pipes 16.

Another example of the regulation unit 7 (regulation unit 71) will be described with reference to FIG. The regulating portion 7 shown in FIGS. 6 and 8 to 10 is configured by inserting the protruding portions 31a and 32a formed in the lock bracket 31 and the cable bracket 32 into the insertion hole 13d formed in the extending portion 13b. It had been. In the regulating portion 71 shown in FIG. 11, the insertion hole 13d formed in the extending portion 13b is the same as that shown in FIG. 6, but the protruding portion is different. The regulating portion 71 is provided with a rod-shaped member 32c that stands upright at the end of the cable bracket 32 as a protruding portion. At least the 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 detached from the rod-shaped member 32c. If the protruding amount of the rod-shaped member 32c is sufficiently long, the nut 32d may not be provided.
Further, the end portion of the lock bracket 31 is bent in an L shape, and when a predetermined load is applied, the end portion 31d of the lock bracket 31 comes into contact with the lower surface 13e of the extension portion 13b.

The vehicle seat S of the present embodiment has been described above with reference to the drawings. In the present embodiment, the extension portion 13b is formed with an insertion hole 13d as the regulation portion 7, and the lock bracket 31 and the cable bracket 32 are provided with the protrusions 31a and 32a, which is an example. A protruding portion protruding downward may be formed in the extending portion 13b as a regulating portion, and an insertion hole may be formed in the lock bracket 31 and / or the cable bracket 32.

S Vehicle seat (Vehicle seat)
Sh Seat body T Trim cover P Pad member 1 Seat back 2 Seat cushion 3 Head rest 4 Slide rail 5 Lower rail 6 Upper rail 7, 71 Restriction part F Seat frame 10 Seat back frame 11 Back side frame 12 Base frame 13 Rail bracket 13a Bracket body 13b Extension part 13c Protrusion part 13d Insertion hole 13e Bottom surface 13f Notch 13g Bolt hole 13h Flange part 13i, 13k Through hole 13j Connection pipe hole 14 Connection bracket 14a Flange part 15 Connection part 16 Connection pipe 17 Bolt 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 member)
31a Protruding parts 31b, 31d End faces (part of the upper surface)
31c Top 32 cable bracket (rail member)
32a Protruding part 32b End face (part of upper surface)
32c Rod-shaped member 32d Nut 40 Child seat 41 Lower anchor 42 Tether anchor K, L, M Gap J Thickness

Claims (11)

It ’s a vehicle seat,
The seat body and
A slide rail that has a lower rail and an upper rail that is supported so as to be relatively movable with respect to the lower rail, and slides the seat body along the front-rear direction of the vehicle seat.
A base frame having a connecting portion for connecting the seat body and the upper rail, and an extending portion extending from the connecting portion toward the front of the vehicle seat is provided.
The extension portion is provided so that a part of the lower surface of the extension portion and a part of the upper surface of the rail member constituting the upper rail come into contact with each other when at least a predetermined load is applied.
The extension portion and the rail member include a regulation portion that regulates the movement of the base frame in the width direction of the vehicle seat. The first aspect of the present invention is characterized in that a gap is provided between a part of the lower surface of the extending portion and a part of the upper surface of the rail member when the predetermined load is not applied. Described vehicle seat. The claim is characterized in that the regulating portion is configured by having an insertion hole formed in either one of the extension portion and the rail member, and having a protruding portion inserted into the insertion hole in the other. The vehicle seat according to 1 or 2. The vehicle seat according to claim 3, wherein a plurality of insertion holes through which the protrusions are inserted are formed in the front-rear direction. A gap is formed between the inner wall surface of the insertion hole and the side portion of the protrusion, and when the predetermined load is applied, the side portion of the protrusion and the inner wall surface of the insertion hole come into contact with each other. The vehicle seat according to claim 3 or 4, wherein the seat is in contact with the vehicle. The slide rail has a locking mechanism that regulates the movement of the upper rail.
The vehicle seat according to any one of claims 3 to 5, wherein the protruding portion is provided in the lock mechanism. The sixth aspect of claim 6, wherein the connecting portion of the base frame is fixed to a rear portion of the upper rail, and the extending portion is provided at a position where the locking mechanism and the locking mechanism are vertically overlapped with each other in a side view. Vehicle seat. The vehicle seat according to claim 6 or 7, wherein a notch is formed between the connecting portion and the extending portion so as to avoid the locking mechanism. The vehicle according to any one of claims 1 to 8, wherein the base frame has a bulging portion formed so as to bulge outward in the width direction of the vehicle seat and extend in the front-rear direction. Sheet for. Any of claims 1 to 9, wherein the base frame has a flange portion at an outer peripheral end portion, and the extending portion is formed in a U-shaped cross section that opens inward in the width direction of the vehicle seat. The vehicle seat described in item 1. A reclining mechanism that rotates the seat body at the connection portion of the base frame,
At a position opposite to the base frame, a rear bracket that connects the seat body and the upper rail, and
The vehicle seat according to any one of claims 1 to 10, further comprising two connecting members for connecting the base frame and the rear bracket at positions before and after sandwiching the reclining mechanism. ..

Images