JP7393629B2 - vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat, and particularly to a vehicle seat whose displacement during 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, the child seat is fixed to the seat by connecting the connector of the child seat to a mounting bracket called a lower anchor provided on the seat.

In the prior art described in Patent Document 1, the lower part of the child seat is attached to the seat using a locking arm. For example, although not shown in the drawings, 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 seat to the seat back and engaging the tether anchor to 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 for the child seat, and ensuring the rigidity of the seat frame and taking measures against deformation must be realized separately using the seat frame mechanism and material.

When a child seat is integrally attached to the seat back using a tether anchor, if an excessive impact load is input from the front due to a frontal collision, the inertia force acting on the child seat and seat cushion will cause the child seat and seat cushion to A force is generated that tries 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 tilt forward and be significantly displaced.

Patent Document 2 discloses a structure for preventing the seat cushion from detaching due to the force that is applied during a frontal collision. Specifically, the peripheral edge of the engagement hole on the rear side of a pair of brackets erected at the rear of the support frame is securely engaged by the engagement 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.

Patent No. 5248093 Patent No. 6544636

In the invention disclosed in Patent Document 2, although the forward movement of the seat cushion is stopped by a guide hook, the load on the seat back is not reduced, so the seat back may tilt forward and be significantly 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 excessive load at the time of a collision is suppressed.

The problem is a vehicle seat that includes a seat body, a lower rail, an upper rail that is supported to be movable relative to the lower rail , and a lock mechanism that restricts movement of the upper rail . A slide rail that slides the seat body along the front-rear direction of the vehicle seat, a connecting portion that connects the seat body and the upper rail, and an extension extending toward the front of the vehicle seat from the connecting portion. a base frame having a base frame provided at a position vertically overlapping with the locking mechanism in a side view , the extending part having a free end, and having a predetermined shape attached to the seat body. The base frame is provided so that when a load is applied, the base frame rotates and a part of the lower surface of the extension part and a part of the upper surface of the locking mechanism come into contact with each other , and the extension part and The locking mechanism has a regulating part that regulates movement of the base frame in the width direction of the vehicle seat, and the regulating part has an insertion hole formed in the lower surface of the extending part and a part that projects upward. and a protrusion provided on the lock mechanism so as to be inserted into the insertion hole .

According to the above-described vehicle seat, the base frame includes an extending portion extending forward from the connecting portion thereof, and the extending portion includes a portion of the lower surface of the extending portion and an upper surface of the rail member. are provided so as to come into contact with each other when at least a predetermined load is applied. As a result, rotation of the base frame is suppressed, and 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 restriction portion, the seat body is reliably supported by the base frame, and displacement of the seat body can be suppressed.
Furthermore, the above configuration suppresses displacement of the base frame in the width direction.
Further, with the above configuration, since the protrusion is provided in the lock mechanism, the protrusion can be provided without adding a new member, and displacement in the width direction can be efficiently suppressed.
Further, with the above configuration, displacement can be suppressed with a compact arrangement.

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

In the above-mentioned vehicle seat, it is preferable that a plurality of the insertion holes through which the protrusion is 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 described above, a gap is formed between the inner wall surface of the insertion hole and the side of the protrusion, and when the predetermined load is applied, the side 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 of the hole.
With the above configuration, it is possible to suppress the amount of displacement in the width direction, and also suppress the generation of abnormal noise when a predetermined load is not applied.

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

In the vehicle seat described above, the base frame may have a bulge portion formed 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 described above, the base frame may have a flange portion at an outer peripheral end thereof, and the extending portion may be formed in a U-shaped cross section opening inward in the width direction of the vehicle seat.
With the above configuration, the rigidity of the back frame and the extending portion are improved.

In the vehicle seat described above, a reclining mechanism that rotates the seat body is provided at the connection portion of the base frame, and a rear bracket that connects the seat body and the upper rail at a position on the opposite side of the base frame. and two connecting members connecting the base frame and the rear bracket at front and rear positions 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 extending portion extending forward from the connecting portion thereof, and the extending portion includes a portion of the lower surface of the extending portion and an upper surface of the rail member. and a part thereof are provided so as to abut at least when a predetermined load is applied. As a result, rotation of the base frame is suppressed, and 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 restriction portion, the seat body is reliably supported by the base frame, and 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 contact between the extension portion and the rail member.
Further, according to the vehicle seat of the present invention, displacement of the base frame in the width direction is suppressed.
Further, according to the vehicle seat of the present invention, since a plurality of insertion holes are formed in the front-rear direction, displacement in the width direction can be efficiently suppressed.
Further, according to the vehicle seat of the present invention, it is possible to suppress the amount of displacement in the width direction and to 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 protrusion is provided in the lock mechanism, the protrusion can be provided without adding any new member, and displacement in the width direction can be efficiently suppressed. I can do it.
In addition, by supporting the extending portion at a position vertically overlapping the locking mechanism in a side view with a space provided therebetween, displacement can be suppressed with a more compact arrangement.
Additionally, since a notch is formed between the connection part and the extension part to avoid the lock mechanism, interference between the base frame and the lock mechanism is eliminated, and the extension part can be arranged compactly. can.
Furthermore, since the base frame has the bulge, the rigidity of the base frame is improved.
In addition, the base frame has a flange portion at the outer peripheral end and the extending portion is formed in a U-shaped cross section opening inward in the width direction, which improves the rigidity of the base frame and increases the rigidity of the extending portion. It also improves.
Moreover, the rigidity of the base frame is improved by having two connecting members that connect the base frame and the rear bracket at the front and rear positions sandwiching the reclining mechanism.

1 is a perspective view showing the appearance of a vehicle seat according to an embodiment of the present invention. FIG. 2 is a perspective view of a seat frame included in the vehicle seat. FIG. 2 is a side view of the vehicle seat. 4 is an enlarged view showing part A of FIG. 3. FIG. FIG. 3 is a schematic diagram showing the state of the vehicle seat when an excessive load is applied. FIG. 2 is a perspective view seen from the X direction in FIG. 1 , showing how the base frame and the slide rail are connected. It is a perspective view of the rail bracket which comprises a base frame. 7 is a cross-sectional view taken along line VIII-VIII in FIG. 6. FIG. 7 is a sectional view taken along line IX-IX in FIG. 6. FIG. 7 is a sectional view taken along the line XX in FIG. 6. FIG. It is a figure which shows another example of a protrusion part.

Hereinafter, the configuration of a vehicle seat according to an embodiment of the present invention will be described with reference to the drawings. However, the embodiments described below are for facilitating understanding of the present invention, and are not intended to limit the present invention. That is, the present invention may be modified and improved without departing from its spirit, and it goes without saying that the present invention includes equivalents thereof.
Further, in the following description, the content regarding the material, shape, and size of the seat component parts is merely one specific example, and does not limit the present invention.

In addition, below, a vehicle seat mounted in a vehicle will be cited 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 installed in ground vehicles with wheels such as automobiles and trains, but can also be applied to seats installed in aircraft, ships, etc. that move on areas other than the ground. may be applied.

In addition, in the following description, the "front-back direction" refers to the front-back direction of the vehicle seat (in other words, the front-back direction of the seat body), and is a direction that coincides with the direction in which the vehicle travels. Moreover, the "seat width direction" is the width direction of the vehicle seat (in other words, the width direction of the seat body), and is a direction that coincides with the left-right direction as seen from an occupant seated on the vehicle seat. Moreover, the "vertical direction" refers to the 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, "outside the car" in the seat width direction means the side closer to the outside of the car body (for ease of understanding, the side closest to the nearest door), and "inside the car" means the side closer to the inside of the car body (for ease of understanding, the side closest to the nearest door). Easy means the side farthest from the nearest door).
In addition, in the following description, "rotation" means a rotation movement about an axis along the sheet width direction, unless otherwise specified.

Note that the shape, position, posture, etc. of each part of the vehicle seat described below will be described assuming that the vehicle seat is in the seated state, which will be described later, unless otherwise specified.

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

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

As shown in FIG. 1, the vehicle seat S has a seat body Sh forming its main body portion. As shown in FIG. 1, the seat body Sh includes a seat back 1 serving as a backrest portion that supports the back of a seated person, a seat cushion 2 serving as a seating portion that supports the buttocks of the seated person, and an upper portion of the seat back 1. , the main component is a headrest 3 that supports the head of the seated person. 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 rotatably attached to the vehicle floor via a base frame 12, which will be described later.

As shown in FIG. 2, the vehicle seat S is provided with a seat frame F, which includes a seat back frame 10 that is a frame of a seat back 1 and a frame of a 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.

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 forming a seat back 1 and a 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.

Further, the seat cushion 2 has a rear end portion connected to a side portion of the seat back 1. Note that a cushion side frame 21, which will be described later, is interposed between the rear end of the seat cushion 2 and the lower end of the seat back 1, as shown in FIGS. 1 and 2. This cushion side frame 21 is rotatably attached to the seat back 1. Thereby, the seat cushion 2 can rotate together with the seat back 1.

Furthermore, a slide rail 4, which will be described later, is installed at the bottom of the seat body Sh. This slide rail 4 allows the seat body Sh to be attached to the vehicle floor in a slidable manner in the front and rear directions.

Further, the seat body Sh can be stored in a folded state on a 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, the part of the vehicle body floor located in front of the seat body Sh when the seat body Sh is in the seated state) downward. It's space.

As shown in FIG. 2, the main components of the seat frame F are a seat back frame 10 that forms the backrest part of the seat frame F, and a seat cushion frame 20 that forms the backbone of the seating part of the seat frame F. .
The seat back frame 10 mainly includes a pipe frame 18 made of a pipe processed into a rectangular frame shape, a back panel 22, and a back side frame 11.

The back side frames 11 are frames that are attached to the left and right sides of the pipe frame 18 and extend in the vertical direction. In other words, the backside frame 11 is a frame that is arranged on the outside of the seat of the pipe frame 18 and forms the left and right ends of the seatback frame 10 together with the side parts of the pipe frame 18. The backside frame 11 is a U-shaped plate-shaped frame with a cross section open toward the inside of the seat. The backside frame 11 has an upper part welded to the center of the side of the pipe frame 18, and is rotatably attached to a base frame 12, which will be described later.

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

The slide rail 4 is a device for sliding the seat body Sh along the front-rear direction, and has a known structure (the structure of a general slide rail mechanism). The slide rails 4 each include a pair of lower rails 5 fixed on the vehicle body floor, and a pair of upper rails 6 that are slidable relative to the lower rails 5 (see FIGS. 1 and 2). An upper rail 6 is slidable on a lower rail 5 fixed to the vehicle body. The seat back frame 10 is attached to the upper rail 6 via the base frame 12, and the seat back frame 10 can move forward and backward with respect to the lower rail 5 together 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 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 lock device 30 is provided with a lock bracket 31 and a cable bracket 32 that holds a cable.

Normally, the upper rail 6 is locked by the locking device 30 so that it cannot slide, and when the occupant performs a predetermined operation, the upper rail 6 is unlocked and becomes slidable. More specifically, an operation member (not shown) is connected to the locking device 30 via a cable. Regarding the locking device 30, a general device for locking the upper rail 6 can be used, so a detailed explanation 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.

<Base frame>
The base frame 12 will be explained in detail using FIGS. 4 to 6. The base frame 12 is a member that connects the lower part of the backside frame 11 and the upper rail 6, as described above. The base frame 12 includes a rail bracket 13 connected to the upper rail 6 and a connecting bracket 14 connected to the backside frame 11. The rail bracket 13 and the connection bracket 14 are fastened together with three bolts 17, as shown in FIG. 4.

The rail bracket 13 includes 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 toward the front of the vehicle seat S from the bracket main body 13a. The bracket body 13a of the rail bracket 13 and the connection bracket 14 constitute a connecting portion 15 that connects the seat body Sh and the upper rail 6.

In the vehicle seat S of this embodiment, the lower surface 13e of the extending portion 13b of the rail bracket 13 and the upper surface of the lock bracket 31 and cable bracket 32 (the end surface 31b shown in FIG. , 32b) are provided with a gap L between them. The size of the gap L is about 1.5 mm, which is narrower than the wall thickness J of the rail bracket 13 (about 2.6 mm). 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 surfaces 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 surfaces 31b and 32b of the lock bracket 31 and the cable bracket 32 may be provided so as to be in contact with each other under normal conditions 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 using a lower anchor 41 (see FIG. 2) and a tether anchor 42 (see FIG. 2), which are ISOFIX mechanisms. Since the child seat 40 is directly fixed to the seat back 1, if an excessive impact load is input from the front due to a collision, etc., the child seat 40 will move forward (in the direction of arrow C) due to inertia, and will be pulled by the seat back. Bag 1 is tilted in the direction of arrow B. Further, 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 in a floating manner. At this time, the extending portion 13b of the base frame 12 connected to the backside frame 11 comes into contact with the end surfaces 31b and 32b of the lock bracket 31 and the cable bracket 32, thereby supporting the seatback frame from rotating in the direction B. 10 displacements can be suppressed. Thereby, 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 restricting portion 7 that restricts movement of the base frame 12 outward in the width direction (in the direction of arrow D in FIG. 6). In this embodiment, as shown in FIGS. 6 and 8, the restriction part 7 has an insertion hole 13d formed in the extension part 13b, and protrusions 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 restrict movement in the width direction. 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.

As described above, when a predetermined load is applied during a collision, the extension portion 13b comes into contact with the end surfaces 31b and 32b of the lock bracket 31 and the cable bracket 32, thereby stopping the rotation of the base frame 12 and closing the seat back. The extending portion 13b supports the frame 10 so that it does not displace. At this time, the rail bracket 13 tries to deform outward in the width direction while the extending portion 13b is in contact with the rail bracket 13. The side surfaces of the protrusions 31a and 32a shown in FIGS. 6 and 8 to 10 come into contact with the inner wall surface of the insertion hole 13d, thereby stopping the extension 13b from moving outward in the width direction. Thereby, 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 substantially parallel opposing surfaces, and a space is provided between the lower surface 13e and the upper surface 31c of the lock bracket 31. Furthermore, in this embodiment, the presence of the gap L between the lower surface 13e of the extending portion 13b and the end surface 31b of the lock bracket 31 suppresses the generation of abnormal noise.

In this embodiment, two insertion holes 13d through which the protrusions 31a and 32a are inserted are formed in the extending 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 hole 13d in the front-rear direction, displacement in the width direction can be efficiently suppressed.
Further, in this embodiment, the protrusions 31a and 32a are provided by bending the end of the lock bracket 31 and the end of the cable bracket 32 into an L shape. By forming the protrusion with two members, the strength of the protrusion is improved. If the strength is not insufficient, the protrusions 31a and 32a may be formed on either the lock bracket 31 or 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, after the lower surface 13e contacts the end surfaces 31b and 32b, the protrusions 31a and 32a contact 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 the assembly of the protrusions 31a and 32a through the insertion holes 13d.

As shown in FIG. 6, the connecting portion 15 (bracket main 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 extending portion 13b of the rail bracket 13 has a space (gap M) at a position vertically overlapping with the locking device 30 in a side view (view of the vehicle seat S from the left). It is set open. With this configuration, a more compact arrangement can be achieved.

Further, as shown in FIGS. 6 and 7, a cutout 13f is formed in the rail bracket 13 between the bracket main body 13a and the extension portion 13b so as 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.

As shown in FIGS. 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.

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 connection bracket 14 that constitute 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, a flange portion 13h is also formed at the outer peripheral end of the extending portion 13b of the rail bracket 13, so that the cross section is U-shaped and opens inward in the width direction of the vehicle seat S. It is formed. By forming the cross section into a U-shape, the rigidity of the extending portion 13b is improved, and 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 in the side surface 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, in the side surface of the bracket body 13a, a through hole 13i is formed between the plurality of bolt holes 13g. By forming the through holes 13i and 13k in the side portion, the weight of the rail bracket 13 can be reduced.

Further, as shown in FIG. 2, a rear bracket 23 is provided at a position opposite to the base frame 12 to connect the lower part of the seatback frame 10 (backside frame 11) and the upper rail 6. At the front and rear positions across the reclining mechanism 19, the rail bracket 13 of the base frame 12 and the rear bracket 23 are connected by two connecting pipes 16 (connecting members). By connecting the two connecting pipes 16, the rigidity of the seat back frame 10 is improved.
Note that the connecting bracket 14 and the rail bracket 13 are fastened together with a bolt 17 at a position further forward than the connecting pipe 16 located on the front side of the two connecting pipes 16.

Another example of the regulating section 7 (regulating section 71) will be described using FIG. 11. The regulating portion 7 shown in FIGS. 6 and 8 to 10 is constructed by inserting the protrusions 31a and 32a formed on the lock bracket 31 and the cable bracket 32 into the insertion hole 13d formed on the extension 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. In the regulating portion 71, a rod-shaped member 32c is provided as a protrusion that stands upright at the end of the cable bracket 32. At least the tip of the rod-shaped member 32c is threaded, and a nut 32d is provided at the tip. The nut 32d prevents the extending portion 13b from displacing upward and coming off the rod-shaped member 32c. If the amount of protrusion 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 into 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 this embodiment has been described above using the drawings. In addition, in this embodiment, the insertion hole 13d is formed in the extension part 13b as the restriction part 7, and the protrusion part 31a, 32a is provided in the lock bracket 31 and the cable bracket 32, but this is just an example. A protruding portion that protrudes downward may be formed on the extending portion 13b as the restricting portion, and an insertion hole may be formed on 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 Headrest 4 Slide rail 5 Lower rail 6 Upper rail 7, 71 Regulating section F Seat frame 10 Seat back frame 11 Back side frame 12 Base frame 13 Rail bracket 13a Bracket body 13b Extension part 13c Swelling part 13d Insertion hole 13e Lower 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 Lock device (lock mechanism)
31 Lock bracket (rail member)
31a Projection 31b, 31d End surface (part of upper surface)
31c Top surface 32 Cable bracket (rail member)
32a Projection 32b End surface (part of top surface)
32c Rod-shaped member 32d Nut 40 Child seat 41 Lower anchor 42 Tether anchors K, L, M Gap J Thickness

Claims (8)

A vehicle seat,
The seat body,
It has a lower rail, an upper rail supported movably relative to the lower rail , and a locking mechanism that restricts movement of the upper rail, and the seat body is slidable along the front-rear direction of the vehicle seat. A slide rail to move the
a connecting portion that connects the seat body and the upper rail; and an extending portion that extends from the connecting portion toward the front of the vehicle seat and is provided at a position that vertically overlaps the locking mechanism in a side view. , a base frame having;
The extending portion has a free end at its tip, and when a predetermined load is applied to the seat body, the base frame rotates and a portion of the lower surface of the extending portion and the upper surface of the locking mechanism are rotated. It is provided so that it comes into contact with a part of the
The extension portion and the locking mechanism include a restriction portion that restricts movement of the base frame in the width direction of the vehicle seat;
The regulating portion is characterized by comprising an insertion hole formed on the lower surface of the extension portion, and a protrusion provided on the locking mechanism so as to protrude upward and be inserted into the insertion hole. vehicle seat. 2. A gap is provided between a portion of the lower surface of the extension and a portion of the upper surface of the locking mechanism when the predetermined load is not applied. vehicle seat. 3. The vehicle seat according to claim 2 , wherein a plurality of the insertion holes into which the protrusion is inserted are formed in the front-rear direction. A gap is formed between the inner wall surface of the insertion hole and the side part of the protrusion, and when the predetermined load is applied, the side part of the protrusion and the inner wall surface of the insertion hole are in contact with each other. The vehicle seat according to any one of claims 1 to 3, wherein the vehicle seat is in contact with the vehicle seat. 5. The vehicle seat according to claim 1, 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 5 , wherein the base frame has a bulge portion formed to bulge outward in the width direction of the vehicle seat and extend in the front-rear direction. Sheet for use. 7. The base frame has a flange portion at an outer peripheral end thereof, and the extending portion is formed in a U-shaped cross section opening inward in the width direction of the vehicle seat. The vehicle seat described in item (1) above. a reclining mechanism that rotates the seat body at the connection portion of the base frame;
a rear bracket connecting the seat body and the upper rail at a position opposite to the base frame;
The vehicle seat according to any one of claims 1 to 7 , further comprising two connecting members connecting the base frame and the rear bracket at front and rear positions sandwiching the reclining mechanism. .

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