JP5156697B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat capable of adjusting a tilt angle of a seat back.

  As a vehicle seat, a vehicle seat having a reclining mechanism for adjusting an inclination angle of a seat back is known. The reclining mechanism attaches the lock mechanism part for fixing the relative rotational position of the cushion frame and the seat back frame, the release mechanism part for releasing the lock mechanism part, and the seat back frame in the forward tilt direction. And a spiral spring for energizing, and is installed on an outer portion in the seat width direction of the connecting portion between the cushion frame and the seat back frame. One end side of the spiral spring is supported by a first locking portion protruding from the cushion frame side, and the other end side is supported by a second locking portion protruding from the seat back frame side.

  Further, in a vehicle seat equipped with such a reclining mechanism, the load input to the side of the seat at the time of a side collision is centered in the width direction of the vehicle body via a reclining mechanism and a reinforcing rod extending in the width direction in the seat. What is transmitted to the area has been devised (see Patent Document 1).

JP-A-6-255414

  In the case of this conventional vehicle seat, at the time of a side collision of the vehicle, an input load is first input from the side of the vehicle body to the reclining mechanism on the outer side in the vehicle width direction, because a plurality of parts are assembled in the reclining mechanism. There is a concern that these components may be crushed or displaced in the early stage of the collision, and the load transmission of the seat to the frame member may be delayed accordingly.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle seat that can quickly transmit a load from a reclining mechanism to a seat frame member at the time of a side collision of the vehicle.

The invention according to claim 1, which solves the above problem, includes a cushion frame (e.g., a cushion frame 7 in an embodiment described later) and a seat back frame (e.g., described later) provided to be tiltable with respect to the cushion frame. The seat back frame 13) in the embodiment and one end side are locked to a first locking portion (for example, a first locking portion 46 in the embodiment described later) provided on the outer side in the vehicle width direction of the cushion frame. A spiral spring (for example, in an embodiment to be described later) whose end side is locked to a second locking portion (for example, a second locking portion 47 in an embodiment to be described later) provided outside the seat back frame in the vehicle width direction. A vehicle seat including a spiral spring 41), wherein the seat bar is disposed outside the cushion frame in the vehicle width direction. Stopper pieces (for example, a front stopper piece 51 and a rear stopper piece 52 in an embodiment described later) that abut against the second locking portion and restrict the inclination angle of the seat back frame when the frame frame is tilted by a predetermined angle or more. ) is provided, the end portion in the vehicle width direction outer side of the stopper piece, said to receive a side impact load prior to the spiral spring, Rutotomoni extends to the outside in the vehicle width direction than the spiral spring, the stopper piece The end of the spiral spring on the outside in the radial direction is bent at a substantially right angle in the circumferential direction around the pivot shaft of the seat back frame .
Thus, when the side wall portion of the vehicle body is displaced in the seat direction at the time of a side collision of the vehicle, a load is input from the side wall portion of the vehicle body to the outer end portion in the vehicle width direction of the stopper piece, and the load is applied to the cushion frame via the stopper piece. Will be communicated.

According to a second aspect of the present invention, in the vehicle seat according to the first aspect, the distance from the cushion frame to the outer end in the vehicle width direction of the stopper piece, and the first locking portion from the cushion frame. The distance to the outer end in the vehicle width direction is set to be substantially the same.
In this case, when the side wall portion of the vehicle body is displaced in the seat direction at the time of a side collision of the vehicle, a load is applied from the side wall portion of the vehicle body to the outer end portions in the vehicle width direction of the stopper piece and the first locking portion at substantially the same timing. The load is transmitted to the cushion frame via the stopper piece and the first locking portion.

According to a third aspect of the present invention, in the vehicle seat according to the first or second aspect, the first locking portion is disposed on a center side of the spiral spring, and the stopper piece is an outer periphery of the spiral spring. And a front stopper piece (for example, a front stopper piece 51 in an embodiment described later) and a rear stopper piece (for example, described later) disposed on the vehicle body front side and the rear side of the first locking portion, respectively. It has the back part stopper piece 52) in embodiment.
In this case, when the side wall portion of the vehicle body is displaced in the seat direction at the time of a side collision of the vehicle, the vehicle body side wall portion is disposed on the vehicle body front side and rear side across the first locking portion on the center side of the spiral spring. The load is input to the front stopper piece and the rear stopper piece.

  According to a fourth aspect of the present invention, in the vehicle seat according to any one of the first to third aspects, the stopper piece and the first locking portion are configured as an integral part. To do.

  According to the first aspect of the present invention, since the end of the stopper piece that regulates the tilt angle of the seat back extends outward in the vehicle width direction from the spiral spring, The load input from the side wall portion of the vehicle body can be quickly transmitted to the cushion frame via the stopper piece.

  According to the second aspect of the present invention, the distance from the cushion frame to the outer end in the vehicle width direction of the stopper piece and the distance from the cushion frame to the outer end in the vehicle width direction of the first locking portion are: Since they are set to be substantially the same, the load input from the side wall portion of the vehicle body can be quickly and stably transmitted to the cushion frame via the stopper piece and the first locking portion at the time of a side collision.

  According to the third aspect of the present invention, the front stopper piece and the rear stopper piece are respectively arranged on the outer peripheral side of the spiral spring and on the vehicle body front side and rear side across the first locking part. Therefore, the load input from the side wall portion of the vehicle body at the time of a side collision can be promptly and stably transmitted to the cushion frame via the two-position stopper pieces separated from the front and rear of the vehicle body.

  According to the invention described in claim 4, since the stopper piece and the first locking portion are formed as an integral part, the structure can be simplified and the number of parts can be reduced, and the stopper piece can be cushioned. It can be easily positioned with respect to the frame.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention, and is a perspective view of a vehicle interior as viewed from a diagonally upper rear side of a vehicle seat. It is a perspective view of the reclining mechanism of the vehicle seat of one embodiment of this invention. It is a top view of the reclining mechanism of the vehicle seat of one embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of the interior of a vehicle as viewed from the obliquely upward rear side of a vehicle seat 1 on the front seat side. In the figure, the vehicle seat 1 shows only the skeleton.

  A vehicular seat 1 is connected to a seat cushion 2 that supports an occupant's buttocks and thighs, and a seat back 3 that is connected to a rear end portion of the seat cushion 2 so as to be tiltable in the front-rear direction and supports the occupant's waist and back. And a headrest 4 supported on the upper portion of the seat back 3 and supporting the head and neck of the occupant.

  The seat cushion 2 includes a cushion frame 7 in which rear end portions of left and right side frame portions 7a and 7b along the longitudinal direction of the vehicle body are connected via a rear cross member 6, and the cushion frame 7 is seat rails 8 and 8 respectively. Is attached to the vehicle body floor 9 so as to be slidable in the front-rear direction. In the figure, 10 is a side sill provided at the lower end side of the vehicle body, 11 is a center pillar standing substantially at the center of the vehicle body side, and 12 is a vehicle width direction center on the vehicle body floor 9. It is a floor tunnel formed by bulging upward in the region. On the floor tunnel 12, a console box 30 having a storage portion 30a on the upper surface side is fixedly installed.

  The seat back 3 includes a substantially rectangular frame-shaped seat back frame 13 including an upper frame portion 13a, left and right side frame portions 13c and 13d, and a lower connecting plate 13b, and the lower end of the seat back frame 13 is a cushion frame 7 It is connected to the rear end part of the rear end so that it can tilt.

  By the way, the rear edge portions of the left and right side frame portions 7a and 7b of the cushion frame 7 are overlapped on the outer sides in the seat width direction of the lower edge portions of the left and right side frame portions 13c and 13d of the seat back frame 13, and these The left and right side frame portions 7a, 13c and 7b, 13d are connected to each other via a reclining mechanism 40 capable of adjusting the angle. The left and right reclining mechanisms 40 include a lock mechanism unit (not shown) that fixes the relative rotational positions of the cushion frame 7 and the seat back frame 13, a release mechanism unit (not shown) that unlocks the lock mechanism unit, and a seat. A spiral spring 41 that urges the back frame 13 in a forward tilt direction with respect to the cushion frame 7.

The lock mechanism portion of each reclining mechanism 40 has a well-known structure that restricts the relative rotation of the cushion frame 7 and the seat back frame 13 by engagement of a claw and a groove, and the release mechanism portion is a seat cushion 2. It is operated by a release lever 42 arranged on the side of the. Further, the release mechanism portions of the left and right reclining mechanisms 40 are connected to each other via an operating rod (not shown) extending in the seat width direction. A reinforcing pipe 15 is arranged in the peripheral area of the operating rod, and a load input to the side frame portion 7a on the outer side in the vehicle width direction is applied to the vehicle through the operating rod and the reinforcing pipe 15 at the time of a side collision of the vehicle. It can be transmitted to the side frame portion 7b on the inner side in the width direction.
Note that an end surface of the reclining mechanism 40 on the inner side in the vehicle width direction (a portion on the inner side in the vehicle width direction) faces the side surface of the console box 30. In the figure, 44 is a resin cover of the reclining mechanism 40 on the inner side in the vehicle width direction. In practice, a similar cover is also attached to the reclining mechanism 40 on the outer side in the vehicle width direction, but is omitted in FIG. 1 for the sake of illustration.

2 and 3 are a perspective view and a plan view of the reclining mechanism 40 on the outer side in the vehicle width direction as viewed from the outside.
As shown in these drawings, the spiral spring 41 of the reclining mechanism 40 on the outer side in the vehicle width direction is disposed on the outer side (outer side in the vehicle width direction) of the side frame portion 7a of the cushion frame 7 on the cushion frame 7 and the seat back. It is arranged so as to surround the periphery of the pivot shaft 45 (see FIG. 2) of the frame 13, and the radially inner end is locked to the first locking portion 46 projecting from the cushion frame 7, and the radially outer side. Is engaged with a second locking portion 47 projecting from the seat back frame 13.

  The first locking portion 46 is formed on a part of a metal locking plate 48, and the locking plate 48 is fixed to the outer surface of the side frame portion 7a of the cushion frame 7 by riveting or welding. Has been. The first locking portion 46 is disposed in the central region of the locking plate 48, and a front extension wall 49 extending to the upper front side of the vehicle body is provided on the base portion side of the first locking portion 46. A rear extension wall 50 extending to the rear side of the vehicle body is continuously provided. The front extension wall 49 and the rear extension wall 50 are disposed inside the spiral spring 41 in the seat width direction.

  The first locking portion 46 has an arc-shaped cross section extending outward in the sheet width direction, and the bending locking portion 41a inside the spiral spring 41 is engaged with one end edge in the arc direction of the arc-shaped cross section. It has become so. The first locking portion 46 passes through the spring 41 on the inner peripheral side of the spiral spring 41, and the tip end side protrudes outward in the sheet width direction of the spiral spring 41. Further, a retaining portion 46a having a large arc width is provided at the distal end portion of the first locking portion 47, and this prevents the inner end portion (bending locking portion 41a) of the spiral spring 41 from slipping outward in the vehicle width direction. It is regulated by the retaining portion 46a.

  The front extension wall 49 and the rear extension wall 50 of the locking plate 48 are in contact with a second locking portion 47 (to be described later) when the seat back frame 13 is tilted in the front-rear direction. A front stopper piece 51 and a rear stopper piece 52 for restricting the tilt angle are integrally formed.

The front stopper piece 51 and the rear stopper piece 52 are provided with extending portions 51 a and 52 a that straddle the outer peripheral side of the spiral spring 41 and protrude outward in the vehicle width direction from the spring 41.
Further, the distance from the cushion frame 7 to the distal end portions of the extending portions 51a, 52a of the front stopper piece 51 and the rear stopper piece 52 is the distance from the cushion frame 7 to the distal end portion of the first first locking portion 46. Is set to be almost the same. Further, the radially outer ends of the front stopper piece 51 and the rear stopper piece 52 are bent substantially at right angles in the circumferential direction around the pivot shaft 45, and the bent portions 51b and 52b are used to The rigidity is improved.

  On the other hand, the 2nd latching | locking part 47 consists of metal plate materials, and is being fixed to the side surface outside the vehicle width direction of the side frame part 13c of the seat back frame 13 by riveting or welding. Further, the second locking portion 47 is provided with a root portion at a position where it does not interfere with the cushion frame 7 when the seat back frame 13 tilts, and the tip end side exceeds the side frame portion 7a of the cushion frame 7 and the vehicle width. It extends outward in the direction. And the front end side of this extension part is formed in cross-sectional arc shape, and the bending | flexion latching | locking part 41b outside the spiral spring 41 is engaged with the one edge of the arc direction. Further, the distal end portion of the second locking portion 47 is provided with a retaining portion 47a having a wide arc width so that the outer end portion (bending locking portion 41b) of the spiral spring 41 is prevented from slipping outward in the vehicle width direction. It is regulated by the retaining portion 47a.

  In the above configuration, when an impact load is input from the side of the vehicle at the time of a side collision and the side wall of the vehicle body such as the center pillar 11 is deformed in the direction of the vehicle seat 1, the side wall of the vehicle body comes into contact with the reclining mechanism 40 on the outer side in the vehicle width direction. .

  The load input to the reclining mechanism 40 on the outer side in the vehicle width direction of the vehicle seat 1 is transmitted to the side portions of the cushion frame 7 and the seat back frame 13, and the operating rod that connects the left and right reclining mechanisms 40, 40; It is transmitted to the reclining mechanism 40 on the inner side in the vehicle width direction through the reinforcing pipe 15 surrounding the peripheral area. At this time, when the entire vehicle seat 1 moves inward in the vehicle width direction and the reclining mechanism 40 inside in the vehicle width direction contacts the console box 30, the load is transmitted to the floor tunnel 12 via the console box 30.

  By the way, in this vehicle seat 1, the front stopper piece 51, the rear stopper piece 52 and the first locking portion 46 on the locking plate 48 protrude beyond the spiral spring 41 to the outside in the vehicle width direction. When the side wall of the vehicle body comes into contact with the reclining mechanism 40 on the outer side in the vehicle width direction at the time of a side collision of the vehicle, the end portions of the front stopper piece 51, the rear stopper piece 52 and the first locking portion 46 are first loaded from the side wall side of the vehicle body. receive. At this time, the front stopper piece 51, the rear stopper piece 52, and the first locking portion 46 are directly fixed to the cushion frame 7, so that the cushion frame is not deformed or crushed in each part of the reclining mechanism 40. The load is transmitted to 7 and the other reclining mechanism 40.

  As described above, in the vehicle seat 1, the front stopper piece 51 and the rear stopper piece 52 that extend outward in the vehicle width direction from the spiral spring 41 protrude from the side frame portion 7 a outside in the vehicle width direction. Therefore, the load can be quickly transmitted to the cushion frame 7 at the time of a side collision.

In particular, in the vehicle seat 1, the front stopper piece 51 and the rear stopper piece 52 are similarly arranged on the front and rear of the vehicle body with the first locking portion 46 sandwiched in the center. It is possible to receive a load evenly without deviation and to stably transmit the load from the side wall of the vehicle body to the cushion frame 7.
In this embodiment, since the central first locking portion 46 protrudes outward in the vehicle width direction at the same height as the front stopper piece 51 and the rear stopper piece 52, the front stopper piece 51 and the rear stopper Along with the piece 52, the load input from the side wall of the vehicle body can be transmitted to the cushion frame 7 more stably.

Further, the vehicle seat 1 of this embodiment includes a first locking portion 46 that locks the inner end portion of the spiral spring 41, a front stopper piece 51 that restricts the tilt angle of the seat back frame 13, and a rear stopper. Since the piece 52 is formed on the locking plate 48 as an integral part, there is an advantage that the product cost can be reduced by simplifying the structure and reducing the number of parts.
Further, the vehicular seat 1 includes a front stopper piece 51 and a rear stopper piece 52 which are integral with the central first locking portion 46, and therefore the first central portion of the front stopper piece 51 and the rear stopper piece 52. There is also an advantage that the relative position with respect to the locking portion 46 is always constant, and the front stopper piece 51 and the rear stopper piece 52 can be easily positioned with respect to the cushion frame 7 during assembly.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary.

DESCRIPTION OF SYMBOLS 1 ... Vehicle seat 7 ... Cushion frame 13 ... Seat back frame 41 ... Spiral spring 46 ... 1st latching | locking part 47 ... 2nd latching | locking part 51 ... Front stopper piece (stopper piece)
52 ... Rear stopper piece (stopper piece)

Claims (4)

A cushion frame, a seat back frame provided to be tiltable with respect to the cushion frame, one end side is locked to a first locking portion provided on the outer side in the vehicle width direction of the cushion frame, and the other end side is the seat back In a vehicle seat provided with a spiral spring locked to a second locking portion provided on the outer side in the vehicle width direction of the frame,
On the outer side in the vehicle width direction of the cushion frame, there is provided a stopper piece that abuts on the second locking portion when the seat back frame tilts by a predetermined angle or more and regulates the tilt angle of the seat back frame,
End of the vehicle width direction outer side of the stopper piece, said to receive a side impact load prior to the spiral spring, it extends to the outside in the vehicle width direction than the spiral spring Rutotomoni, of the spiral spring in the stopper A vehicle seat characterized in that a radially outer end is bent at a substantially right angle in a circumferential direction centering on a pivot shaft of the seat back frame .   The distance from the cushion frame to the outer end in the vehicle width direction of the stopper piece and the distance from the cushion frame to the outer end in the vehicle width direction of the first locking portion are set to be substantially the same. The vehicle seat according to claim 1. The first locking portion is disposed on the center side of the spiral spring,
The stopper piece includes a front stopper piece and a rear stopper piece arranged on an outer peripheral side of the spiral spring and on a vehicle body front side and a rear side of the first locking portion, respectively. The vehicle seat according to 1 or 2.   The vehicle seat according to any one of claims 1 to 3, wherein the stopper piece and the first locking portion are configured as an integral part.

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