JP7190801B2 - seat structure - Google Patents

Description

The present invention relates to a vehicle seat structure.

2. Description of the Related Art As a vehicle seat structure, a vehicle seat device disclosed in Patent Document 1 is known. The vehicle seat device of Patent Document 1 includes a pair of left and right seat rails (lower rails), a pair of left and right slide rails (upper rails), a slide lock mechanism, and a seat frame (cushion frame).

A pair of left and right seat rails extend in the longitudinal direction of the vehicle and are arranged on the floor panel. The pair of left and right slide rails are supported by the pair of left and right seat rails so as to be movable in the longitudinal direction of the vehicle. Engagement holes are formed in side walls facing each other of the seat rail and the slide rail. An insertion hole is formed in the upper wall of the slide rail. A slide lock mechanism locks the seat. The seat frame is fixed to the slide rail.

The slide lock mechanism has a lock plate (slide lock member), a hinge pin and a torsion spring. The lock plate has an L-shaped plate body, a lock claw, an unlocking portion, and a hinge hole. The lock claw is formed integrally with the lower end portion of the plate body and is engaged with and disengaged from the engagement holes of the seat rail and the slide rail. The unlocking portion is formed integrally with the upper end portion of the plate body, and the operating portion of the operating lever abuts thereon. The hinge hole is provided between the plate body and the unlocking portion, and the hinge pin is inserted therethrough. The hinge pin rotatably supports the lock plate between a locked position and an unlocked position (unlocked position). The lock position is a position where the lock claws of the lock plate are engaged with the engagement holes of the seat rail and the slide rail, and the unlock position is a position where the engagement is released. A torsion spring always urges the lock plate in the locking direction.

JP 2012-158201 A

If the lock direction of the slide lock member is toward the inside of the vehicle and the unlock direction is toward the outside of the vehicle, there is a risk that the slide lock member will unlock in the event of a side collision of the vehicle. This is because, in the event of a side collision, the upper rail is displaced as the cushion frame is displaced inward of the vehicle, so that the lock claw is disengaged from the engagement hole. In particular, when the side of the vehicle collides with a pole-shaped obstacle such as a utility pole, the slide lock member is easily unlocked.

SUMMARY OF THE INVENTION One of the objects of the present invention is to provide a seat structure that can prevent unlocking of a slide lock member in the event of a side collision of a vehicle with a simple structure.

A seat structure according to one aspect of the present invention includes:
a seat rail having a lower rail fixed to a vehicle floor panel and an upper rail sliding on the lower rail;
Rotation within the range between a locking position where the seat rail is rotated inward of the vehicle to lock the slide of the upper rail and an unlock position where the slide of the upper rail is unlocked by being rotated outward of the vehicle. a freely provided slide lock member;
a rail upper member fixed above the upper rail,
The upper rail has an opening that opens above the slide lock member,
When the rail upper member is displaced toward the inside of the vehicle due to a side collision of the vehicle, the rail upper member is inserted into the seat rail through the opening of the upper rail and contacts the outer side surface of the vehicle of the slide lock member. It has a displacement restricting portion that restricts displacement of the slide lock member in the lock position by coming into contact with the slide lock member.

The seat structure described above can prevent unlocking of the slide lock member in the event of a side collision of the vehicle with a simple configuration in which the rail upper member is provided with the displacement restricting portion. When the cushion frame is displaced toward the inside of the vehicle during a side collision, the displacement regulating portion inserted into the seat rail through the opening of the upper rail abuts against the outer surface of the slide lock member, displacing the slide lock member from the locked position. can be regulated. In this way, since the slide lock member can be prevented from being unlocked in the event of a side collision with a simple structure, an increase in weight, an increase in cost, and a decrease in productivity are less likely to occur.

1 is a perspective view showing an outline of a seat structure according to Embodiment 1. FIG. FIG. 2 is a cross-sectional view showing a state of the seat structure shown in FIG. 1 cut along a section line (II)-(II) and schematically showing a state before a side collision; FIG. 2 is a cross-sectional view of the seat structure shown in FIG. 1 taken along the (II)-(II) cutting line and schematically showing the state at the time of a side collision;

Embodiment 1 of the seat structure of the present invention will be described below with reference to FIGS. 1 to 3. FIG. The same reference numerals in the drawings indicate the same names. In the drawing, "FR" indicates the front of the vehicle, "RR" the rear, "LH" the left, "RH" the right, "UP" the top, and "LWR" the bottom. "OUT" indicates the outside of the vehicle, and "IN" indicates the inside of the vehicle.

<<Embodiment 1>>
[Seat structure]
A seat structure 1 according to Embodiment 1 includes a seat rail 2, a slide lock member 5, and a rail upper member 7 (Fig. 2). The seat rails 2 slidably support the seat 10 along the longitudinal direction of the vehicle (Fig. 1). The seat rail 2 has a lower rail 3 and an upper rail 4 that slides on the lower rail 3 . The slide lock member 5 is rotated within a range between a lock position where the slide of the upper rail 4 is locked by being rotated inward of the vehicle and an unlock position where the slide of the upper rail 4 is unlocked by being rotated outside of the vehicle. It is movably provided (Fig. 2). In FIG. 2, the locked position is indicated by a solid line, and the unlocked position is indicated by a two-dot chain line. The rail upper member 7 is fixed above the upper rail 4 (FIGS. 1 and 2). One of the features of this example is that the upper rail 4 has an opening 411 that opens above the slide lock member 5, and that the rail upper member 7 is inserted into the seat rail 2 through the opening 411 in the event of a side collision of the vehicle. and a displacement regulating portion 71 for regulating displacement of the slide lock member 5 at the locked position (FIG. 2). A detailed description will be given below.

[Sheet]
The seat 10 may be a front seat or a rear seat (FIG. 1). The seat 10 may be a separate type or a bench type. The seat 10 of this example is a front separate type. 1 to 3 show the seat 10 on the right side of the vehicle. The seat 10 includes a seat frame and a seat pad (not shown) covering the seat frame. The seat frame has a cushion frame 11 that forms a skeleton of a seat cushion that serves as a seating surface for a seated occupant, and a back frame 12 that forms a skeleton of a seatback that supports the back of the occupant. The cushion frame 11 is formed in the shape of a rectangular frame, and has a front frame 111 at the front, a pair of left and right side frames 112 , and a rear frame 113 at the rear. The back frame 12 is rotatably supported on the cushion frame 11 . The seat pad has a seat pad covering the cushion frame 11 and a back pad covering the back frame 12. - 特許庁

[Seat rail]
The seat rails 2 slidably support the seat 10 along the longitudinal direction of the vehicle (Fig. 1). The seat rail 2 includes a pair of left and right lower rails 3 and a pair of left and right upper rails 4 . The pair of left and right lower rails 3 extends along the longitudinal direction of the vehicle. In this example, the pair of left and right lower rails 3 are fixed to the floor panel via base brackets 14 at their respective front and rear ends. The pair of left and right lower rails 3 may be directly fixed to the floor panel. A pair of left and right upper rails 4 support a seat 10 and slide on the lower rails 3 . As the upper rails 4 slide on the lower rails 3, the seat 10 connected to the upper rails 4 slides. The connection between the upper rail 4 and the seat 10 is performed via a rail bracket 13 in this example. That is, the lower end side of the rail bracket 13 is fixed to the upper rail 4 , and the upper end side of the rail bracket 13 is fixed to the pair of left and right side frames 112 of the cushion frame 11 . The pair of upper rails 4 and the pair of left and right side frames 112 of the cushion frame 11 may be directly fixed without the rail bracket 13 interposed therebetween.

The pair of left and right lower rails 3 has a bottom portion 31, a pair of left and right outer wall portions 32, a pair of left and right inner wall portions 33, and a connecting portion 34 (FIG. 2). The bottom portion 31, the pair of left and right outer wall portions 32, the pair of left and right inner wall portions 33, and the connecting portion 34 are formed in series. The bottom portion 31 is arranged on the floor panel side. The outer wall portions 32 protrude upward from both left and right edges of the bottom portion 31 . The inner wall portion 33 is a portion that faces the inner side of the outer wall portion 32 and is arranged between the inner wall portion 42 and the outer wall portion 43 of the upper rail 4 . A plurality of through holes 331 into which the claw portions 521 of the slide lock member 5 are inserted and removed are formed in the inner wall portion 33 located inside the vehicle. The connecting portion 34 is a portion that connects the upper end of the outer wall portion 32 and the upper end of the inner wall portion 33 and covers the upper end of the outer wall portion 43 of the upper rail 4 .

The pair of left and right upper rails 4 has a top portion 41 , a pair of left and right inner wall portions 42 , a pair of left and right outer wall portions 43 , and a connecting portion 44 . The top portion 41, the pair of left and right outer wall portions 43, the pair of left and right inner wall portions 42, and the connecting portion 44 are formed in series. The rail upper member 7 is fixed to the top portion 41 . The top portion 41 is arranged to face the bottom portion 31 of the lower rail 3 . The ceiling 41 has an opening 411 . The opening 411 is locally opened at a location corresponding to a displacement restricting portion 71 of the rail upper member 7, which will be described later. It becomes an entrance into the seat rail 2 of 71. The inner wall portion 42 protrudes downward from both left and right edges of the top portion 41 . The inner wall portion 42 faces the inner wall portion 33 of the lower rail 3 . The outer wall portion 43 is a portion facing the inner wall portion 42 and is arranged between the inner wall portion 33 and the outer wall portion 32 of the lower rail 3 . The connecting portion 44 is a portion that connects the lower end of the inner wall portion 42 and the lower end of the outer wall portion 43 and covers the lower end of the inner wall portion 33 of the lower rail 3 below. A plurality of through holes 421 and 431 into which the claw portions 521 of the slide lock member 5 are inserted and removed are formed in the inner wall portion 42 and the outer wall portion 43 positioned inside the vehicle. The plurality of through holes 421 and 431 are provided at positions corresponding to the through hole 331 .

[Slide lock member]
The slide lock member 5 locks and unlocks the slide of the upper rail 4 . The slide lock member 5 is rotatably supported inside and outside the vehicle with a shaft portion 6 supported by the top portion 41 of the upper rail 4 as a fulcrum. The rotation range of the slide lock member 5 in the seat rail 2 is set to a lock position in which the slide of the upper rail 4 is locked by rotating it toward the inside of the vehicle, and to a lock position in which the slide of the upper rail 4 is locked by rotating it toward the outside of the vehicle. It is between the unlock position to release.

The slide lock member 5 has a tubular portion 51 , a lower arm portion 52 and an upper arm portion 53 . The cylindrical portion 51, the lower arm portion 52 and the upper arm portion 53 are integrally formed. The shaft portion 6 is inserted through the tubular portion 51 . The lower arm portion 52 is composed of a curved piece (in this example, a C-shaped piece) or a bent piece (for example, an L-shaped piece) extending downward from the cylindrical portion 51, and has a claw portion 521 at its tip. The claw portion 521 is inserted into and removed from the through holes 431 and 421 of the inner wall portion 42 and the outer wall portion 43 of the upper rail 4 and the through hole 331 of the inner wall portion 33 of the lower rail 3 . The lower arm portion 52 is urged toward the inside of the vehicle by, for example, a torsion spring (not shown). As a result, the state in which the slide lock member 5 is always positioned at the lock position and the claw portion 521 is inserted through the through holes 431 and 421 and the through hole 331 is maintained. The upper arm portion 53 is composed of a bending piece (in this example, an L-shaped piece) or a curved piece (for example, a C-shaped piece) extending upward from the cylindrical portion 51, and has an operation portion 531 at its tip. The operating portion 531 is swung downward by the rear portion 151 (FIG. 2) of the lever 15 (FIG. 1) which is manually operated. By swinging the operating portion 531 downward, the lower arm portion 52 is rotated outwardly of the vehicle against the force of the torsion spring about the shaft portion 6 as a fulcrum, and the inner wall portion 33 of the lower rail 3 is rotated. The claw portion 521 inserted through the through hole 331 is removed from the through hole 331 .

[Rail upper member]
The rail upper member 7 is fixed above the upper rail 4 . In this example, the rail upper member 7 is composed of a rail bracket 13 . When the upper rail 4 and the cushion frame 11 are directly connected without the rail bracket 13 interposed therebetween, the rail upper member 7 is composed of the cushion frame 11 . The rail upper member 7 has a displacement restricting portion 71 .

(Displacement control part)
The displacement restricting portion 71 restricts the displacement of the slide lock member 5 in the locked position during a side collision (FIG. 3). Specifically, the displacement restricting portion 71 is inserted into the seat rail 2 from the opening 411 of the top portion 41 of the upper rail 4 due to the displacement of the rail upper member 7 toward the inside of the vehicle during a side collision. The displacement restricting portion 71 inserted through the opening portion 411 abuts on the vehicle outer side surface of the slide lock member 5 . This abutment restricts the displacement of the slide lock member 5 , thereby restricting the claw portion 521 of the slide lock member 5 from coming out of the through hole 331 of the inner wall portion 33 of the lower rail 3 . That is, the slide lock member 5 can also be restricted from rotating from the locked position to the unlocked position. The position where the displacement restricting portion 71 is formed is a position facing the opening 411 of the top portion 41 of the upper rail 4 in the rail upper member 7 (FIG. 2).

The shape of the displacement restricting portion 71 is not particularly limited as long as it can restrict the displacement of the slide lock member 5, and for example, it can be appropriately selected from a plate-like piece or a bar-like piece. The displacement restricting portion 71 may be configured by cutting and raising a portion of the rail upper member 7 or may be configured by separately connecting to the rail upper member 7 . When cutting and erecting, for example, a part of the rail upper member 7 is punched out by a press so as to form a ]-shaped notch in the rail upper member 7, and the base of the plate-shaped piece formed by the notch is extended inward of the vehicle. flex. When connecting separately, plate-like pieces or bar-like pieces are welded to the rail upper member 7 or fastened with bolts.

[Behavior during side collision]
Mainly referring to FIG. 3, the behavior of the seat structure 1 of this example at the time of a side collision will be described. FIG. 3 shows the outline of the seat structure 1 at the time of a side collision. In FIG. 3, the lock position of the slide lock member 5 is indicated by a chain double-dashed line.

At the time of a side collision, the rail upper member 7 (rail bracket 13) tilts toward the inside of the vehicle due to the load acting from one of the left and right sides of the vehicle toward the other. The inclination of the rail upper member 7 toward the inside of the vehicle deforms the upper rail 4 integrated with the rail upper member 7, and the upper arm portion 53 of the slide lock member 5 supported by the upper rail 4 moves toward the inside of the vehicle. , and the lower arm portion 52 tilts toward the outside of the vehicle. At this time, the displacement restricting portion 71 of the upper rail member 7 is inserted into the seat rail 2 through the opening 411 of the top portion 41 of the upper rail 4 and contacts the outer surface of the vehicle at the lower arm portion 52 of the slide lock member 5. touch. This abutment restricts the claw portion 521 of the slide lock member 5 from coming out of the through hole 331 of the inner wall portion 33 of the lower rail 3 . Therefore, unlocking of the slide lock member 5 is prevented and the locked state is maintained.

[Effect]
The seat structure 1 according to the embodiment can have the following effects.

(1) With a simple configuration in which the rail upper member 7 is provided with the displacement restricting portion 71, unlocking of the slide lock member 5 can be prevented in the event of a side collision of the vehicle. When the cushion frame 11 is displaced toward the inside of the vehicle during a side collision, the displacement restricting portion 71 inserted into the seat rail 2 from the opening 411 of the upper rail 4 is pushed against the outer surface of the vehicle of the lower arm portion 52 of the slide lock member 5. This is because the displacement of the slide lock member 5 in the locked position can be restricted by contact.

(2) An increase in weight, an increase in cost, and a decrease in productivity are unlikely to occur. This is because the unlocking of the slide lock member 5 in the event of a side collision can be prevented with a simple configuration in which the displacement restricting portion 71 is provided.

The present invention is not limited to these examples, but is indicated by the scope of the claims, and is intended to include all modifications within the meaning and scope of equivalents of the scope of the claims.

1 seat structure 10 seat 11 cushion frame 111 front frame 112 side frame 113 rear frame 12 back frame 13 rail bracket 14 base bracket 15 lever 151 rear portion 2 seat rail 3 lower rail 31 bottom portion 32 outer wall portion 33 inner wall portion 331 through hole 34 connecting portion 4 Upper rail 41 Top 411 Opening 42 Inner wall 421 Through hole 43 Outer wall 431 Through hole 44 Connecting part 5 Slide lock member 51 Cylindrical part 52 Lower arm part 521 Claw part 53 Upper arm part 531 Operation part 6 Shaft part 7 Rail Upper member 71 displacement restricting portion

Claims (1)

a seat rail having a lower rail fixed to a vehicle floor panel and an upper rail sliding on the lower rail;
In the space surrounded by the lower rail and the upper rail, the upper rail is rotated inward of the vehicle to lock a slide of the upper rail at a lock position, and the upper rail is rotated outward of the vehicle to unlock the slide of the upper rail at an unlock position. a slide lock member having a lower arm portion that is rotatable within the range of
a rail upper member fixed above the upper rail,
The upper rail has an opening that opens above the slide lock member,
The rail upper member is inserted into the space from the opening of the upper rail by rotational displacement of a portion of the rail upper member above a fixed location with the upper rail toward the inside of the vehicle due to a side collision of the vehicle. a seat structure having a displacement restricting portion that restricts displacement of the slide lock member in the lock position by coming into contact with the outer surface of the vehicle of the slide lock member.

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