JP5013601B2 - Base bracket structure for vehicle seat - Google Patents

Description

  The present invention relates to a base bracket structure for a vehicle seat in which an arm plate is swingably provided on a base bracket with a recliner interposed therebetween.

  A reclining device is widely mounted on a vehicle seat. For example, as described in Japanese Patent Application Laid-Open No. 2001-130296, a pair of left and right base brackets which are seat cushion side fixing plates are mounted directly on the vehicle floor or on the vehicle floor. The upper and lower base brackets are respectively connected to the upper rail of the slide device provided vertically and connected to each other by connecting pipes. A pair of left and right arm plates which are movable plates on the seat back side are swingably attached to the inner side surface of the base bracket with the recliner (lock mechanism) of the reclining device interposed therebetween, and the arm plate is interposed via the seat back frame. The swing of the seat back integrated with is adjusted by a recliner.

  Usually, the recliner is fixed to the base bracket between the base bracket and arm plate on the vehicle wall side, the interlocking shaft is installed between the left and right arm plates, and the arm plate on the vehicle compartment side is a free hinge.

  The recliner (lock mechanism) is unitized, and engages the gears and locks the arm plate to regulate the swing of the seat back. Here, when a load that causes the seat back to swing backward is generated due to a collision (rear collision) of a vehicle or the like from the rear, this load is transmitted from the arm plate to the recliner, and further transmitted to the base bracket via the recliner. The Here, if the load applied to the seat back acts intensively on the recliner, the meshing gear of the recliner may be damaged, and the seat back may suddenly fall backward.

  Generally, increasing the thickness of the base bracket to which the recliner is fixed increases the rigidity of the base bracket, and the load transmitted from the seat back to the recliner is received by the base bracket to prevent the concentrated effect of the load on the recliner. This prevents damage to the recliner gear. For excessive loads that cannot be received by the base bracket, the load applied to the recliner due to deformation of the base bracket is released to the base bracket and absorbed by the base bracket, thereby concentrating the load on the recliner. The action is prevented.

Recently, there has been a strong demand for weight reduction of vehicle seats, the weight of vehicle body parts has been reduced, and the thickness of a base bracket to which a recliner is fixed has been required to be reduced.
Conventionally, the rigidity of the thinned base bracket is increased and strengthened by fixing the reinforcing plate to the side surface (outer side surface) opposite to the side surface (inner side surface) of the base bracket to which the recliner is fixed. Such a configuration is proposed in Japanese Patent Laid-Open No. 2001-130296.

The reinforcing plate does not cover the entire surface of the base bracket, and there is an inferior strength part that is not covered by the reinforcing plate. If an excessive load that cannot be received by the base bracket is applied, the inferior strength part is deformed. Thus, the load applied to the recliner is released to the base bracket.
JP 2001-130296 A

  In the configuration in which a reinforcing plate is provided on the outer surface of the base bracket and the base bracket is sandwiched between the recliner and the reinforcing plate, of course, the number of components (reinforcing plates) increases, and the weight is equivalent to the weight of the increased components (reinforcing plates). Increases and hinders weight reduction.

The reinforcing plate is disposed in the vicinity of the fixed portion of the recliner with a part of the reinforcing plate overlapping the recliner and the base bracket sandwiched between the recliner. Therefore, the rigidity of the base bracket in the vicinity of the fixed portion of the recliner is sufficiently increased, and there is a possibility that the inferior strength portion that deforms under an excessive load does not exist in the vicinity of the fixed portion of the recliner. In particular, in the rear seat, since the base bracket to which the recliner is fixed is smaller than the base bracket in the front seat, it is difficult in design to leave a space with no room and a deformable inferior portion.
Unless there is an inferior strength part that deforms under an excessive load near the fixed part of the recliner, the base bracket does not deform even if an excessive load is applied, and the load applied to the recliner is released to the base bracket. Since this is not possible, the load may concentrate on the recliner and damage the recliner gear.

  An object of the present invention is to provide a base bracket structure for a vehicle seat in which the rigidity of the base bracket is increased while leaving the portion inferior in strength in the vicinity of the fixed portion of the recliner without increasing the weight.

According to the first aspect of the present invention, in the base bracket structure for a vehicle seat, the arm plate is provided swingably on the base bracket with the recliner interposed, and the bead is formed on the base bracket at a position not overlapping the recliner . The base bracket has an extension portion extending in the rearward tilt direction of the arm plate, and a bead is formed in the extension portion in a substantially horizontal direction .

In the present invention according to claim 1, since the bead is formed on the base bracket, the rigidity of the base bracket is increased. Since the bead does not overlap with the recliner, there is a portion inferior in strength between the bead and the recliner in the vicinity of the fixed portion of the recliner. And when the load is excessive, the inferior part is deformed and the load applied to the recliner is released to the base bracket, so that concentration of the load on the recliner is avoided and the recliner gear is prevented from being damaged. The
Only the bead is molded into the base bracket, the number of parts does not increase and the weight does not increase.

  The base bracket has an extending portion extending in the rearward tilt direction of the arm plate, and the bead extending substantially horizontally is formed in the extending portion at a position where it does not overlap the recliner.

1 and 2 are a perspective view and a side view, respectively, of a base bracket of a vehicle seat according to an embodiment of the present invention.
The vehicle seat 10 is embodied as a rear seat in the embodiment, and a base bracket 12 which is a seat cushion side fixing plate is fixed perpendicularly to a slope of a vehicle floor and connected to another base bracket (not shown). A pipe is erected and a pair of left and right base brackets are connected. Of course, it may be embodied as a front seat. In the front seat, the base bracket 12 is fixed to an upper rail of a slide device provided on the vehicle floor.

  An arm plate 14 that is a movable plate on the seat back side is swingably attached to a side surface (usually an inner side surface) of the base bracket 12 with a recliner (lock mechanism) 16 of the reclining device interposed therebetween. For example, the recliner 16 is fixed between the base bracket and the arm plate on the vehicle wall side by bolting or the like on the inner surface of the base bracket 12, and the interlocking shaft 16a is installed between the left and right arm plates, It is considered as a free hinge.

  The recliner 16 of the reclining device is a known unit that locks the arm plate 14 by meshing the gears, and is not the gist of the present invention, and thus detailed description thereof is omitted.

  A return spring 18 composed of a spiral spring is provided on the outer surface of the base bracket 12 to apply a biasing force in the direction of the arrow (counterclockwise in the figure) to the arm plate 14. That is, the inner end 18 i and the outer end 18 o in the radial direction of the return spring are bent, and the inner end 18 i is formed on the locking piece 12 a formed on the base bracket 12, and the locking piece 14 a formed on the arm plate 14. By biasing the outer ends 18 o, the urging force of the return spring 18 is applied to the arm plate 14. For example, the locking pieces 12 a and 14 a are arcuate standing pieces curved corresponding to the torsion of the return spring 18.

  The seat back is integrated with the arm plate 14 via the seat back frame, and the recliner 16 swings forward (inclined forward or backward) of the arm plate forward, indicated by F, or rearward, indicated by R. Adjusted by.

  The base bracket 12 is formed in a flat plate shape, and a flange 12b bent at a substantially right angle in the direction of the recliner 16 is formed at the lower end thereof. As can be clearly understood from FIG. 2, the base bracket 12 has an extending portion 12 c extending in the tilt direction (R direction) thereafter, and the bead 13 is formed on the extending portion so as not to overlap the recliner 16. By forming the bead 13, the rigidity of the base bracket 12 is increased and reinforced at the extended portion 12 c.

The bead 13 is formed in the base bracket 12 so as to extend substantially horizontally and protrude to the extending portion 12c of the base bracket, for example, in a direction away from the recliner 16.
Since the bead 13 is formed on the base bracket 12 at a position that does not overlap the recliner 16, a space S exists between the bead and the recliner in the vicinity of the fixed portion of the recliner. In this space S, since it is not reinforced by the bead 13, the part of the space S is inferior in strength to other parts, and the base bracket 12 is easily deformed.

  The load generated by the rear collision is transmitted from the arm plate 14 to the recliner 16 and further transmitted to the base bracket 12 through the recliner. Since this load swings the seat back backward (backward tilt direction), it mainly acts on the extending portion 12c of the base bracket extending in the rearward tilt direction. However, when the base bracket 12 receives the load at the extended portion 12c formed with the bead 13, the concentrated action of the load on the recliner 16 is prevented, and damage to the recliner gear is prevented.

  For an excessive load that cannot be received by the base bracket 12, the base bracket is deformed in the space S where the strength is inferior. When the base bracket 12 is deformed, the load applied to the recliner 16 is released to the base bracket and absorbed by the base bracket, so that the concentrated action of the load on the recliner is prevented, and the recliner gear is damaged. Be blocked.

Since the rigidity of the base bracket 12 can be increased simply by forming the bead 13, there is no need to use a reinforcing plate, the number of parts does not increase, and the weight does not increase.
Because it does not use a reinforcing plate, the rear seat base bracket, which is smaller than the front seat base bracket and does not have enough space, can be set without any design constraints. .

Since the load generated by the rear impact mainly acts on the extending portion 12c of the base bracket extending in the backward tilt direction, if the bead 13 is formed into the extending portion 12c and the rigidity of the base bracket is increased at this portion, The load generated by the protrusion can be effectively received, and the durability is improved.
Further, the load due to the rear impact acts to deform the base bracket extending portion 12c in a substantially vertical direction. Therefore, the bead 13 is extended in a substantially horizontal direction by the extending portion, and the deformation direction (substantially vertical direction) is set. If they are provided orthogonally, the value of the load that can be received before deformation is increased, and the durability is improved.
However, the portion of the bead 13 to be molded is not limited to the extending portion 12c extending in the backward tilt direction, and the bead may be molded to another portion, and the bead is formed by extending in a direction other than the substantially horizontal direction. May be.

  As described above, according to the present invention, since the bead is formed on the base bracket, the rigidity of the base bracket is increased without using a reinforcing plate, the number of parts does not increase, and the weight does not increase. In addition, since the bead does not overlap the recliner, there is an inferior strength portion between the recliner and the bead in the vicinity of the fixed portion of the recliner. Concentration of the load on the

  The above-described embodiments are for explaining the present invention, and are not intended to limit the present invention. All modifications, alterations, etc. within the technical scope of the present invention are included in the present invention. Needless to say.

  In the embodiment, the bead is formed on the bracket of the rear seat that is smaller than the base bracket of the front seat. However, the present invention is not limited to the base bracket of the rear seat, and a bead may be formed on the base bracket of the front seat.

  Although the present invention is suitable for a rear seat of a vehicle such as an automobile or an aircraft, and a base bracket of a front seat, it can be widely used for various seats that generate a load for tilting the seat backward, for example, a seat in a play facility.

The perspective view of the base bracket of the vehicle seat which concerns on one Example of this invention is shown. The side view of the base bracket of the vehicle seat which concerns on one Example of this invention is shown.

Explanation of symbols

10 Vehicle Seat 12 Base Bracket (Seat Cushion Side Fixing Plate)
12a Locking piece 12b Flange 12c Extension part 13 Bead 14 Arm plate (movable plate on the seat back side)
14a Locking piece 16 Recliner of reclining device (lock mechanism)
16a Interlocking shaft 18 Return spring
18i, 18o Inner end, outer end

Claims (1)

In the base bracket structure of the vehicle seat in which the arm plate is swingably provided on the base bracket via the recliner, and the bead is formed on the base bracket at a position not overlapping the recliner.
A base bracket structure for a vehicle seat, wherein the base bracket has an extending portion extending in a rearward tilt direction of the arm plate, and a bead is formed in the extending portion in a substantially horizontal direction.

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