Vehicle seats

Abstract

To obtain a vehicular seat which can inhibit movement of an occupant to the seat front side during a front collision of a vehicle.SOLUTION: A vehicular seat 10 includes: a front panel 14 which is provided at a front part of a seat cushion 12 and has a displacement member 30 which is bent to the seat lower side by a load input during a front collision of a vehicle; a support member 16 provided at a rear part of the seat cushion 12; and a cushion spring 20 installed between the displacement member 30 and the support member 16.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat. [Background technology]

[0002] A structure in which a front panel with its rear end inclined downward toward the rear of the seat is provided at the front of the seat cushion, a horizontal frame is provided at the rear of the seat cushion, and a cushion spring is installed between the rear end of the front panel and the horizontal frame has been known for some time (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-159126 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when the seat cushion (cushion pad) is made thinner, the inclination angle of the rear end of the front panel becomes gentler, and the upper surface of the front panel and the upper surface of the cushion spring are connected smoothly (flatly), making it difficult for the seat cushion to prevent the occupant from moving forward in the seat during a frontal collision of the vehicle.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a vehicle seat that can prevent an occupant from moving forward in the seat during a frontal collision of the vehicle. [Means for solving the problem]

[0006] In order to achieve the above object, a vehicle seat according to a first aspect of the present invention includes a front panel provided at a front portion of a seat cushion and having a displacement member that is bent and deformed toward a seat lower side by a load input during a frontal collision of the vehicle, a support member provided at a rear portion of the seat cushion, and a cushion spring that is installed between the displacement member and the support member. The displacement member has a pair of support plates extending in the seat front-rear direction and a connecting plate extending in the seat width direction and connecting rear ends of the support plates, and the front ends of the support plates are fixed to the front panel. .

[0007] According to the invention described in claim 1, a cushion spring is installed between a displacement member of a front panel provided at the front of the seat cushion and a support member, and the displacement member is bent and deformed toward the lower side of the seat by a load input during a frontal collision of the vehicle. 。

[0008] Therefore, in the event of a frontal collision of the vehicle, the displacement member forms an inclined portion that slopes downward and rearward on the seat cushion, which means that the occupant's buttocks are caught on the portion of the seat cushion where the inclined portion is formed, thereby restricting the occupant from moving forward on the seat.

[0009] Moreover, this Displacement member teeth The displacement member has a pair of support plates extending in the seat front-rear direction and a connecting plate extending in the seat width direction and connecting the rear ends of the support plates, and the front ends of the support plates are fixed to the front panel. That is, this displacement member is easily bent and deformed because the pair of support plates are configured to bend downward due to a load input during a frontal collision of the vehicle. Therefore, the inclined portion is quickly formed during a frontal collision of the vehicle.

[0010] In addition, Front end of support plate but, It is fixed to the front panel at approximately the center of the seat in the front-to-rear direction. 、 Rear end of front panel but, The displacement member is bent downwards by a larger amount than the bending deformation of the displacement member. Good .

[0011] To this According 、The rear end of the front panel does not hinder the bending deformation of the displacement member.In addition, since the displacement member can be placed at the rear end of the front panel where the front end of the cushion spring was originally attached in a conventional thin seat cushion, there is no need to change the design of the cushion spring length. [Effects of the Invention]

[0012] As described above, according to the present invention, it is possible to suppress movement of an occupant toward the front side of the seat in the event of a frontal collision of the vehicle. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a schematic side view showing an internal structure of a seat cushion according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic perspective view showing a front panel and a displacement bracket according to the present embodiment. [Figure 3] 2 is a schematic side view showing an enlarged view of the internal structure of the seat cushion according to the embodiment before a frontal collision; FIG. [Figure 4] 3 is a schematic side view showing an enlarged view of the internal structure of the seat cushion according to the embodiment after a frontal collision. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. For convenience of explanation, the arrow UP shown in each drawing indicates the upward direction of the vehicle seat, the arrow FR indicates the forward direction of the vehicle seat, and the arrow RH indicates the rightward direction of the vehicle seat. In the following description, when the directions of up / down, front / rear, and left / right are mentioned without special mention, they refer to up / down in the up / down direction of the vehicle seat, front / rear in the front / rear direction of the vehicle seat, and left / right in the left / right direction (seat width direction) of the vehicle seat.

[0015] 1, a vehicle seat 10 according to this embodiment includes a seat cushion 12 that supports the buttocks and thighs of an occupant P, a seat back 18 that supports the back of the occupant P, and a headrest (not shown) that supports the head of the occupant P. A metal front panel 14 is provided at the front of the rear side (inside) of the seat cushion 12, and a cylindrical frame 16 that serves as a support member is provided at the rear with its axis aligned with the seat width direction.

[0016] 2, the front panel 14 has a flat upper wall portion 14U whose longitudinal direction is the seat width direction (left-right direction), and a peripheral wall portion 14A that is integrally suspended downward from the peripheral edge of the upper wall portion 14U excluding the rear end portion thereof. Cutouts 14C of a predetermined length are formed along the front-rear direction at predetermined positions on both the left and right sides of the rear end portion of the upper wall portion 14U, and the rear end portion of the upper wall portion 14U is bent downward.

[0017] In the following description, the rear end portion of the front panel 14 bent downward from the upper wall portion 14U is referred to as the rear piece 14B, and the linear portion (the ridge portion extending in the left-right direction) that is the boundary between the upper wall portion 14U and the rear piece 14B and that is the starting point of the bending is referred to as the bending portion 14L. The bending angle θ1 (see FIG. 3) of the rear piece 14B downward from the upper wall portion 14U is set to an angle that does not inhibit the bending deformation of the displacement bracket 30, which will be described later, and the length of the rear piece 14B in the front-to-rear direction is short so as not to inhibit the bending deformation.

[0018] 1 and 2, a metal displacement bracket 30 serving as a displacement member is provided on the upper wall portion 14U of the front panel 14. Specifically, the displacement bracket 30 is formed in a substantially "Π" shape in a plan view, and has a pair of left and right flat support plates 32 extending in the front-to-rear direction, and a flat connecting plate 34 extending in the left-to-right direction and integrally connecting the rear ends of the support plates 32.

[0019] The front end 32F of the support plate 32 is fastened (fixed) to the approximate center in the front-rear direction of the upper wall 14U (the front portion of the bent portion 14L) by screwing or the like. Although not shown in Fig. 2, the upper wall 14U may be formed with a recess 15 for preventing the head 42 of the screw 40 from protruding upward, as shown in Fig. 3.

[0020] 2, a plurality of (for example, three) circular locking holes 36, into which hook portions 24 (described later) are inserted, are formed side by side in the left-right direction in the connecting plate 34 of the displacement bracket 30. The displacement bracket 30 is configured so that the rear side of the front end portion 32F of the support plate 32 can bend downward and deformed by a collision load input during a frontal collision of the vehicle.

[0021] That is, the rear portion 14B of the front panel 14 is bent downward at a predetermined angle θ1 (to an extent that does not hinder the bending deformation of the displacement bracket 30), and the length in the front-to-rear direction is shortened. Therefore, the rear side of the front end portion 32F of the support plate 32 in the displacement bracket 30 can be bent downward with a portion (hereinafter referred to as "starting point portion 33") that faces the bending portion 14L in the up-down direction as the starting point of bending.

[0022] 2 and 3 show the displacement bracket 30 bent slightly downward with the starting point 33 as the bending starting point, but it does not have to be bent under normal circumstances. Also, as shown in Fig. 4, the downward bending angle θ2 of the displacement bracket 30 relative to the front end 32F (upper wall portion 14U) is smaller than the downward bending angle θ1 of the rear piece portion 14B. The bent displacement bracket 30 forms an inclined portion 38 that is inclined downward and rearward.

[0023] 1, a plurality of (for example, three) cushion springs 20 are installed between the displacement bracket 30 and the frame 16. The cushion spring 20 is configured by forming an elongated metal rod-shaped member having a circular cross section into a generally wave-shaped shape in a plan view, and a hook portion 24 and a hook portion 28 are integrally formed at a front end 22 and a rear end 26 thereof, respectively.

[0024] The hook portions 24 formed on the front end portions 22 of each cushion spring 20 are inserted into and engaged with the locking holes 36 formed in the connecting plate 34 of the displacement bracket 30, and the hook portions 28 formed on the rear end portions 26 of each cushion spring 20 are each engaged with the frame 16 from above.

[0025] The seat cushion 12 according to this embodiment is a thin seat cushion, and is configured such that the upper surface of the upper wall portion 14U of the front panel 14, the upper surface of the displacement bracket 30, and the upper surfaces of the cushion springs 20 are smoothly connected (almost flat). The connecting plate 34 is configured to be disposed at approximately the same position as the rear end (the rear end that is not bent and not shortened) of the front panel (not shown) in a conventional thin seat cushion (not shown).

[0026] Next, the operation of the vehicle seat 10 according to this embodiment configured as described above will be described.

[0027] As described above, the seat cushion 12 of the vehicle seat 10 according to this embodiment is a thin seat cushion, and is configured so that the upper surface of the upper wall portion 14U of the front panel 14, the upper surface of the displacement bracket 30, and the upper surfaces of the cushion springs 20 are smoothly connected (almost flat). Therefore, in order to prevent the occupant P from moving forward of the seat cushion 12 due to inertial force in the event of a frontal collision of the vehicle, the seat cushion 12 is formed with an inclined portion 38 that restricts movement of the buttocks of the occupant P. This will be explained below.

[0028] When a vehicle equipped with the vehicle seat 10 according to this embodiment is involved in a frontal collision, the resulting input collision load (the inertial force applied by the buttocks of the occupant P) causes the displacement bracket 30 to bend downward with the starting point 33 as the starting point of bending. That is, as shown in FIG. 4 , the displacement bracket 30 forms an inclined portion 38 that is inclined downward and rearward. Therefore, in the event of a frontal collision of the vehicle, the occupant P's buttocks can be caught on the portion of the seat cushion 12 where the inclined portion 38 is formed, thereby restricting the seat cushion 12 from moving forward.

[0029] Moreover, the displacement bracket 30 has a pair of left and right support plates 32 extending in the front-to-rear direction, and a connecting plate 34 extending in the left-to-right direction and integrally connecting the rear ends of the support plates 32, and the front ends 32F of the support plates 32 are fixed to the front panel 14. In other words, this displacement bracket 30 is configured so that the pair of left and right support plates 32 are bent downward and deformed by a collision load input during a frontal collision of the vehicle.

[0030] Therefore, this displacement bracket 30 is more susceptible to bending deformation than, for example, a displacement bracket (not shown) that is a support plate with the same width (length in the left-right direction) as the connecting plate 34. In other words, this displacement bracket 30 can be efficiently bent downward due to the collision load input during a frontal collision of the vehicle. Therefore, the inclined portion 38 can be quickly formed by the displacement bracket 30 during a frontal collision of the vehicle.

[0031] Furthermore, under normal circumstances, the connecting plate 34 of the displacement bracket 30 is configured to be disposed at the rear end (the rear end that is not bent and not shortened) of the front panel of a conventional thin seat cushion to which the hook portion 24 of the cushion spring 20 was originally attached. Therefore, there is no need to change the design of the length of the cushion spring 20. In other words, in this embodiment, the existing cushion spring 20 can be used as is, thereby suppressing increases in manufacturing costs.

[0032] Furthermore, the rear piece 14B of the front panel 14 is bent downward by a greater amount than the bending deformation of the displacement bracket 30, and its length in the front-to-rear direction is shortened. Therefore, even if the front end 32F of the support plate 32 is fixed to approximately the center of the front panel 14 in the front-to-rear direction so as not to change the design length of the cushion spring 20, the rear piece 14B of the front panel 14 does not hinder the bending deformation of the displacement bracket 30.

[0033] While the vehicle seat 10 according to this embodiment has been described above with reference to the drawings, the vehicle seat 10 according to this embodiment is not limited to the one shown in the drawings, and the design can be modified as appropriate within the scope of the present invention. For example, the means for fastening the front end 32F of the support plate 32 to the upper wall portion 14U is not limited to fastening by screws or the like, and welding may also be used. [Explanation of symbols]

[0034] 10 Vehicle seats 12 seat cushions 14 Front Panel 16 Frame (support member) 20 Cushion spring 30 Displacement bracket (displacement member) 32 Support plate 34 Connecting plate

Claims

[Claim 1] a front panel provided at a front portion of the seat cushion and having a displacement member that is bent and deformed toward the lower side of the seat due to a load input during a frontal collision of the vehicle; a support member provided at a rear portion of the seat cushion; a cushion spring disposed between the displacement member and the support member; Equipped with The displacement member is a pair of support plates extending in the front-rear direction of the seat; a connecting plate extending in the seat width direction and connecting rear ends of the support plates; and The front end of the support plate is fixed to the front panel.

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