Vehicle seat

Abstract

To provide a vehicular seat enabling suppression of the movement of an occupant to the seat front side at the time of head-on collision of a vehicle.SOLUTION: A vehicular seat 10 is provided, comprising a front panel 14 arranged in the front of a seat cushion 12, a support member 16 arranged in the back of the seat cushion 12 and a cushion spring 20 installed between the front panel 14 and the support member 16. The cushion spring 20 has a first cushion spring 22 mounted to the front panel 14, a second cushion spring 26 mounted to the support member 16, a resin-made first connection portion 30 formed in a substantially U-shape when viewed from the sheet width direction and connecting a rear end portion 22B of the first cushion spring 22 and a front end portion 26F of the second cushion spring 26 and a resin-made second connection portion 40 connecting the rear end portion 22B of the first cushion spring 22 and the front end portion 26F of the second cushion spring 26 and ruptured by load input in head-on collision time of a vehicle.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] A structure in which a front panel with a rear end inclined downward to the rear of the vehicle 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 conventionally known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when the seat cushion (cushion pad) is thinned, the inclination angle of the rear end of the front panel becomes gentle, and the upper surface of the front panel and the upper surface of the cushion spring are smoothly (flatly) connected. Therefore, it has been difficult to suppress the movement of the occupant toward the front side of the seat by the seat cushion during a frontal collision of the vehicle.

[0005] Therefore, an object of the present invention is to obtain a vehicle seat capable of suppressing the movement of an occupant toward the front side of the seat during a frontal collision of the vehicle.

Means for Solving the Problems

[0006] In order to achieve the above object, the vehicle seat according to claim 1 of the present invention includes a front panel provided at the front portion of the seat cushion, a support member provided at the rear portion of the seat cushion, and a cushion spring installed between the front panel and the support member. The cushion spring includes a first cushion spring attached to the front panel, a second cushion spring attached to the support member, a resin-made first connecting portion formed in a substantially "U" shape when viewed in the seat width direction and connecting the rear end portion of the first cushion spring and the front end portion of the second cushion spring, and a resin-made second connecting portion that connects the rear end portion of the first cushion spring and the front end portion of the second cushion spring and is broken by a load input during a frontal collision of the vehicle.

[0007] According to the invention described in claim 1, the cushion spring includes a first cushion spring attached to the front panel, a second cushion spring attached to the support member, a resin-made first connecting portion formed in a substantially "U" shape when viewed in the seat width direction and connecting the rear end portion of the first cushion spring and the front end portion of the second cushion spring, and a resin-made second connecting portion that connects the rear end portion of the first cushion spring and the front end portion of the second cushion spring and is broken by a load input during a frontal collision of the vehicle.

[0008] Therefore, when the second connecting portion breaks due to the load input during a frontal collision of the vehicle, the rear end portion of the first cushion spring and the front end portion of the second cushion spring descend, and an inclined portion that inclines downward to the rear of the seat is formed by the first connecting portion. That is, during a frontal collision of the vehicle, since the occupant's buttocks catch on the portion where the inclined portion of the seat cushion is formed, the movement of the occupant toward the front side of the seat is suppressed.

[0009] Note that the substantially "U" shape in the present invention includes a shape close to a substantially "V" shape. Also, the "connection" of the second connecting portion in the present invention includes not only a configuration in which the rear end portion of the first cushion spring and the front end portion of the second cushion spring are directly connected, but also a configuration in which they are connected via other members (for example, a part of the first connecting portion).

[0010] The vehicle seat according to claim 2 is the vehicle seat according to claim 1, wherein the cushion spring is formed in a substantially corrugated shape in plan view, and the second connecting portion connects the central portion in the seat width direction at the rear end portion of the first cushion spring and the central portion in the seat width direction at the front end portion of the second cushion spring.

[0011] According to the invention described in claim 2, the cushion spring is formed in a substantially corrugated shape in plan view, and the second connecting portion connects the central portion in the seat width direction at the rear end portion of the first cushion spring and the central portion in the seat width direction at the front end portion of the second cushion spring. Therefore, compared with the case where the second connecting portion connects, for example, both end portions in the seat width direction at the rear end portion of the first cushion spring and both end portions in the seat width direction at the front end portion of the second cushion spring, a load is input to the second connecting portion more efficiently, and the second connecting portion is more likely to break. Thus, when a frontal collision of the vehicle occurs, an inclined portion is formed promptly.

[0012] The vehicle seat according to claim 3 is the vehicle seat according to claim 2, wherein the first connecting portion includes a pair of side portions formed in a substantially "U" shape when viewed from the seat width direction, an upper front portion that connects the upper end portions on the seat front side of the side portions in the seat width direction and is attached to the rear end portion of the first cushion spring, an upper rear portion that connects the upper end portions on the seat rear side of the side portions in the seat width direction and is attached to the front end portion of the second cushion spring, a lower front portion that connects the lower portions on the seat front side of the side portions in the seat width direction, and a lower rear portion that connects the lower portions on the seat rear side of the side portions in the seat width direction.

[0013] According to the invention described in claim 3, the first connecting portion includes a pair of side portions formed in a substantially "U" shape when viewed in the seat width direction, a front upper portion that connects the upper end portions on the front side of the seat of the side portions in the seat width direction and is attached to the rear end portion of the first cushion spring, a rear upper portion that connects the upper end portions on the rear side of the seat of the side portions in the seat width direction and is attached to the front end portion of the second cushion spring, a front lower portion that connects the lower portions on the front side of the seat of the side portions in the seat width direction, and a rear lower portion that connects the lower portions on the rear side of the seat of the side portions in the seat width direction. Therefore, the rigidity of the inclined portion is ensured, and the movement of the occupant toward the front side of the seat is more effectively suppressed.

[0014] Further, the vehicle seat according to claim 4 is the vehicle seat according to claim 2, wherein the first connecting portion is formed in a substantially "U" shape when viewed in the seat width direction, and is composed of a pair of plate-like members that respectively connect both end portions in the seat width direction at the rear end portion of the first cushion spring and both end portions in the seat width direction at the front end portion of the second cushion spring.

[0015] According to the invention described in claim 4, the first connecting portion is formed in a substantially "U" shape when viewed in the seat width direction, and is composed of a pair of plate-like members that respectively connect both end portions in the seat width direction at the rear end portion of the first cushion spring and both end portions in the seat width direction at the front end portion of the second cushion spring. Therefore, the rigidity of the inclined portion is ensured, and the movement of the occupant toward the front side of the seat is more effectively suppressed.

[0016] Further, the vehicle seat according to claim 5 is the vehicle seat according to any one of claims 2 to 4, wherein the second connecting portion has a vulnerable portion at the central portion in the seat front-rear direction.

[0017] According to the invention described in claim 5, the second connecting portion has a vulnerable portion at the central portion in the seat front-rear direction. Therefore, the second connecting portion is easily broken from the central portion in the seat front-rear direction. Thus, when the vehicle has a frontal collision, the inclined portion is formed more promptly.

Advantages of the Invention

[0018] As described above, according to the present invention, it is possible to suppress the movement of the occupant toward the front side of the seat during a frontal collision of the vehicle.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0020] Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. For the sake of convenience of explanation, the arrow UP appropriately shown in each figure is the upward direction of the vehicle seat, the arrow FR is the forward direction of the vehicle seat, and the arrow RH is the rightward direction of the vehicle seat. And in the following description, when the directions of up and down, front and back, and left and right are described without special mention, they indicate the up and down in the up and down direction of the vehicle seat, the front and back in the front and back direction of the vehicle seat, and the left and right in the left and right direction (seat width direction) of the vehicle seat.

[0021] <First Embodiment> First, the vehicle seat 10 according to the first embodiment will be described. As shown in FIG. 1, this vehicle seat 10 includes a seat cushion 12 that supports the buttocks and thighs of the 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 substantially flat plate-shaped metal front panel 14 is provided at the front part on the back side (inside) of the seat cushion 12, and a cylindrical frame 16 as a support member is provided at the rear part with the seat width direction as the axial direction.

[0022] And a cushion spring 20 is installed between the front panel 14 and the frame 16. Note that the seat cushion 12 according to the present embodiment is a thin seat cushion, and the upper surface of the front panel 14 and the upper surface of the cushion spring 20 are smoothly (flatly) connected.

[0023] As shown in FIG. 2, the cushion spring 20 is configured by forming an elongated metal rod-shaped member having a circular cross-section into a substantially corrugated shape in plan view. And this cushion spring 20 is separated into a first cushion spring 22 that is locked and attached to the front panel 14 and a second cushion spring 26 that is locked and attached to the frame 16.

[0024] A circular locking hole (not shown) is formed at the rear end of the front panel 14, and a hook portion 24 that is inserted into and locked to the locking hole is integrally formed at the front end of the first cushion spring 22. Further, a hook portion 28 that is locked to the frame 16 from above is integrally formed at the rear end of the second cushion spring 26.

[0025] The rear end portion 22B of the first cushion spring 22 and the front end portion 26F of the second cushion spring 26 are connected by a first connecting portion 30 formed by assembling an elongated resin rod-shaped member having a circular cross-section. That is, as shown in FIG. 3, the first connecting portion 30 is formed in a substantially "U" shape when viewed from the seat width direction. The upper end portion on the front side thereof is attached to the rear end portion 22B of the first cushion spring 22, and the upper end portion on the rear side thereof is attached to the front end portion 26F of the second cushion spring 26.

[0026] Specifically described, as shown in FIGS. 2 and 3, the first connecting portion 30 includes a pair of side portions 34 formed in a substantially "U" shape when viewed from the seat width direction, a front upper portion 32 that connects the upper end portions on the front side of the side portions 34 in the seat width direction and is attached by being fitted into the rear end portion 22B of the first cushion spring 22, a rear upper portion 36 that connects the upper end portions on the rear side of the side portions 34 in the seat width direction and is attached by being fitted into the front end portion 26F of the second cushion spring 26, a front lower portion 33 that connects the lower portions on the front side of the side portions 34 connected by the front lower portion 33 in the seat width direction, and a rear lower portion 35 that connects the lower portions on the rear side of the side portions 34 connected by the rear lower portion 35 in the seat width direction.

[0027] Cylindrical portions 39 having the seat width direction as the axial direction are integrally formed in a pair at the upper end portions of the front upper portion 32 and the rear upper portion 36, respectively, with a space therebetween in the seat width direction. The rear end portion 22B of the first cushion spring 22 is inserted (fitted) into the cylindrical portion 39 (through hole 39A shown in FIG. 5) of the front upper portion 32, and the front end portion 26F of the second cushion spring 26 is inserted (fitted) into the cylindrical portion 39 (through hole 39A shown in FIG. 5) of the rear upper portion 36.

[0028] Also, the lower portions on the front side of the side portions 34 connected by the front lower portion 33 and the lower portions on the rear side of the side portions 34 connected by the rear lower portion 35 are each slightly bent. Thus, the substantially "U" shape in the first embodiment includes a shape close to a substantially "V" shape.

[0029] Further, the central portion in the seat width direction at the rear end portion 22B of the first cushion spring 22 and the central portion in the seat width direction at the front end portion 26F of the second cushion spring 26 are connected by a second connecting portion 40 which is an elongated resin rod-shaped member having a circular cross-section. That is, the front end portion of this second connecting portion 40 is attached by being fitted to the rear end portion 22B of the first cushion spring 22, and the rear end portion thereof is attached by being fitted to the front end portion 26F of the second cushion spring 26.

[0030] Cylindrical portions 39 equivalent to the cylindrical portion 39 are integrally formed at the front end portion and the rear end portion of the second connecting portion 40 as well. The rear end portion 22B of the first cushion spring 22 is inserted (fitted) into the cylindrical portion 39 on the front end portion side of the second connecting portion 40 (the through-hole 39A shown in FIG. 5), and the front end portion 26F of the second cushion spring 26 is inserted (fitted) into the cylindrical portion 39 on the rear end portion side of the second connecting portion 40 (the through-hole 39A shown in FIG. 5).

[0031] Note that the rear end portion 22B of the first cushion spring 22 is inserted (fitted) into each cylindrical portion 39 in a state where the cylindrical portion 39 on the front end portion side of the second connecting portion 40 is disposed between the pair of cylindrical portions 39 of the front upper portion 32. Similarly, the front end portion 26F of the second cushion spring 26 is inserted (fitted) into each cylindrical portion 39 in a state where the cylindrical portion 39 on the rear end portion side of the second connecting portion 40 is disposed between the pair of cylindrical portions 39 of the rear upper portion 36.

[0032] That is, the position of the second connecting portion 40 is determined by the pair of cylindrical portions 39 in the front upper portion 32 and the pair of cylindrical portions 39 in the rear upper portion 36. And this second connecting portion 40 is formed of a resin material having lower rigidity and strength than the first connecting portion 30. That is, this second connecting portion 40 is configured to be broken by the collision load input during a frontal collision of the vehicle (not shown).

[0033] Here, since the front upper part 32 and the rear upper part 36 of the first connecting part 30 have the rear end part 22B of the first cushion spring 22 and the front end part 26F of the second cushion spring 26 inserted (fitted) into the respective cylindrical parts 39 (the through holes 39A shown in FIG. 5), they are rotatable about the rear end part 22B of the first cushion spring 22 and the front end part 26F of the second cushion spring 26.

[0034] Therefore, as shown in FIG. 4, when the second connecting part 40 breaks, the front upper part 32 and the rear upper part 36 of the first connecting part 30 rotate relative to each other about the rear end part 22B of the first cushion spring 22 and the front end part 26F of the second cushion spring 26, and the rear end part 22B of the first cushion spring 22 and the front end part 26F of the second cushion spring 26 descend, so that an inclined part 38 that inclines downward to the rear is formed by the first connecting part 30.

[0035] Next, the operation of the vehicle seat 10 according to the first embodiment configured as described above will be described.

[0036] As described above, the seat cushion 12 of the vehicle seat 10 according to the first embodiment is a thin seat cushion, and the upper surface of the front panel 14 and the upper surface of the cushion spring 20 are smoothly (flatly) connected. Therefore, in order to suppress the movement of the occupant P to the front side of the seat cushion 12 due to inertia force during a frontal collision of the vehicle, an inclined part 38 that restricts the movement of the occupant P's buttocks is formed on the seat cushion 12. This will be described below.

[0037] When a vehicle equipped with the vehicle seat 10 according to the first embodiment undergoes a frontal collision, the second connecting portion 40 breaks due to the collision load (inertial force applied by the buttocks of the occupant P) input thereby. Then, as shown in FIG. 4, the rear end portion 22B of the first cushion spring 22 and the front end portion 26F of the second cushion spring 26 descend, and an inclined portion 38 that inclines downward to the rear is formed by the first connecting portion 30. Therefore, at the time of a frontal collision of the vehicle, the occupant P can hook the buttocks on the portion where the inclined portion 38 of the seat cushion 12 is formed, so that the movement of the seat cushion 12 toward the front side is suppressed.

[0038] Moreover, the first connecting portion 30 includes a pair of side portions 34 formed in a substantially "U" shape when viewed in the seat width direction, an upper front portion 32 that connects the upper end portions on the front side of the side portions 34 in the seat width direction and is attached by being fitted to the rear end portion 22B of the first cushion spring 22, a rear upper portion 36 that connects the upper end portions on the rear side of the side portions 34 in the seat width direction and is attached by being fitted to the front end portion 26F of the second cushion spring 26, a lower front portion 33 that connects the lower portions on the front side of the side portions 34 in the seat width direction, and a lower rear portion 35 that connects the lower portions on the rear side of the side portions 34 in the seat width direction. Therefore, the rigidity of the inclined portion 38 is ensured, and the movement of the occupant P toward the front side is more effectively suppressed.

[0039] Further, the cushion spring 20 is formed in a substantially corrugated shape in plan view, and the second connecting portion 40 connects the central portion in the seat width direction of the rear end portion 22B of the first cushion spring 22 and the central portion in the seat width direction of the front end portion 26F of the second cushion spring 26. Therefore, compared with the case where the second connecting portion 40 connects both end portions in the seat width direction of the rear end portion 22B of the first cushion spring 22 and both end portions in the seat width direction of the front end portion 26F of the second cushion spring 26, respectively, the collision load is input to the second connecting portion 40 more efficiently, and the second connecting portion 40 is more likely to break. Thus, at the time of a frontal collision of the vehicle, the inclined portion 38 by the first connecting portion 30 can be formed promptly.

[0040] <Second Embodiment> Next, the vehicle seat 10 according to the second embodiment will be described. Note that the same reference numerals are given to the parts equivalent to those of the vehicle seat 10 according to the first embodiment, and the detailed description (including the common operations) is omitted as appropriate.

[0041] As shown in FIG. 5, in this second embodiment, only the structures of the first connecting portion and the second connecting portion that connect the rear end portion 22B of the first cushion spring 22 and the front end portion 26F of the second cushion spring 26 are different from those of the first embodiment. Specifically, the rear end portion 22B of the first cushion spring 22 and the front end portion 26F of the second cushion spring 26 are connected by a resin-made first connecting portion 31 formed in a substantially "U" shape when viewed from the seat width direction.

[0042] That is, this first connecting portion 31 is composed of a pair of left and right plate-like members 37 formed in a substantially "U" shape when viewed from the seat width direction. The upper end portions on the front side of the left plate-like member 37L and the upper end portions on the front side of the right plate-like member 37R are respectively attached by being fitted into the rear end portion 22B of the first cushion spring 22, and the upper end portions on the rear side of the left plate-like member 37L and the upper end portions on the rear side of the right plate-like member 37R are respectively attached by being fitted into the front end portion 26F of the second cushion spring 26.

[0043] Specifically, cylindrical portions 39 having the seat width direction as the axial direction are integrally formed at the upper end portions on the front side and the upper end portions on the rear side of each of the plate-like members 37L and 37R. The rear end portion 22B of the first cushion spring 22 is inserted (fitted) into the through hole 39A in the cylindrical portion 39 on the front side of each of the plate-like members 37L and 37R, and the front end portion 26F of the second cushion spring 26 is inserted (fitted) into the through hole 39A in the cylindrical portion 39 on the rear side of each of the plate-like members 37L and 37R.

[0044] As a result, both ends in the seat width direction at the rear end portion 22B of the first cushion spring 22 and both ends in the seat width direction at the front end portion 26F of the second cushion spring 26 are connected by a pair of left and right plate-like members 37, respectively. Note that the lower portions on the front side and the lower portions on the rear side of each of the plate-like members 37L and 37R are slightly bent, respectively. Thus, the substantially "U" shape in the second embodiment includes a shape close to a substantially "V" shape.

[0045] Also, the central portion in the seat width direction at the rear end portion 22B of the first cushion spring 22 and the central portion in the seat width direction at the front end portion 26F of the second cushion spring 26 are connected by a resin-made second connecting portion 41. That is, this second connecting portion 41 is formed in a flat plate shape with the vertical direction as the normal direction, and is attached by fitting the front end portion of the second connecting portion 41 to the rear end portion 22B of the first cushion spring 22, and the rear end portion of the second connecting portion 41 is attached by fitting to the front end portion 26F of the second cushion spring 26.

[0046] Specifically described, cylindrical portions 39 equivalent to the cylindrical portion 39 are integrally formed at the front end portion and the rear end portion of the second connecting portion 41, respectively. The rear end portion 22B of the first cushion spring 22 is inserted (fitted) into the through hole 39A in the cylindrical portion 39 on the front end portion side of the second connecting portion 41, and the front end portion 26F of the second cushion spring 26 is inserted (fitted) into the through hole 39A in the cylindrical portion 39 on the rear end portion side of the second connecting portion 41.

[0047] As a result, the central portion in the seat width direction at the rear end portion 22B of the first cushion spring 22 and the central portion in the seat width direction at the front end portion 26F of the second cushion spring 26 are connected by the second connecting portion 41. And this second connecting portion 41 is molded with a resin material having lower rigidity and strength than the first connecting portion 31, and a fragile portion 42 is formed at the central portion in the front-rear direction thereof.

[0048] This vulnerable part 42 is configured such that the width of the second connecting part 41 (length in the seat width direction) gradually decreases from the front end side and the rear end side toward the central part side, forming a so-called constricted part. That is, the second connecting part 41 is formed in a shape like an hourglass in plan view. Therefore, when a collision load is input during a frontal collision of the vehicle (not shown), the second connecting part 41 is broken from the central part in the front-rear direction by the collision load.

[0049] And each plate-like member 37L, 37R constituting the first connecting part 31 has the rear end part 22B of the first cushion spring 22 and the front end part 26F of the second cushion spring 26 inserted (fitted) into the cylindrical part 39 on the front side and the cylindrical part 39 on the rear side thereof, respectively. Therefore, they can rotate around the rear end part 22B of the first cushion spring 22 and the front end part 26F of the second cushion spring 26.

[0050] Therefore, when the second connecting part 41 breaks, the plate-like members 37L, 37R rotate relatively around the rear end part 22B of the first cushion spring 22 and the front end part 26F of the second cushion spring 26, the rear end part 22B of the first cushion spring 22 and the front end part 26F of the second cushion spring 26 descend, and an inclined part 38 (see FIG. 4) that inclines downward to the rear is formed by the first connecting part 31 (each plate-like member 37L, 37R) in the same manner as in the first embodiment. Thus, during a frontal collision of the vehicle, the forward movement of the occupant P is suppressed.

[0051] Moreover, the first connecting part 31 in the second embodiment is formed in a substantially "U" shape when viewed from the seat width direction, and is composed of a pair of plate-like members 37 that connect both ends in the seat width direction of the rear end part 22B of the first cushion spring 22 and both ends in the seat width direction of the front end part 26F of the second cushion spring 26, respectively. Therefore, the rigidity of the inclined part 38 can be ensured (increased) more than that of the first connecting part 30 in the first embodiment. Thus, the forward movement of the occupant P can be suppressed more effectively.

[0052] Further, a weak portion 42 is formed at the center in the front-rear direction of the second connecting portion 41. Therefore, compared with the case where the weak portion 42 is not formed at the center in the front-rear direction of the second connecting portion 41, the second connecting portion 41 is particularly likely to break from the center in its front-rear direction. Thus, when a frontal collision of the vehicle occurs, the inclined portion 38 by the first connecting portion 31 can be formed more promptly.

[0053] As described above, the vehicle seat 10 according to the present embodiment has been described with reference to the drawings. However, the vehicle seat 10 according to the present embodiment is not limited to that shown in the drawings, and can be appropriately designed and changed within a range not departing from the gist of the present invention. For example, the cushion spring 20 is not limited to being formed in a substantially corrugated shape in plan view. Further, the first connecting portion 31 in the second embodiment is not limited to being constituted by the plate-like member 37, and may be constituted by, for example, a film-like member that is difficult to break and is formed in a substantially "U" shape when viewed from the seat width direction.

[0054] Further, the second connecting portions 40 and 41 may be formed of the same resin material as the first connecting portions 30 and 31. In this case, it is preferable that a weak portion (not shown) for making the second connecting portion 40 in the first embodiment easily break by the input collision load is formed. As the weak portion, for example, similar to the second connecting portion 41 in the second embodiment, the thickness of the center in the front-rear direction of the second connecting portion 40 may be reduced, or a notch portion (not shown) may be formed at the center in the front-rear direction of the second connecting portion 40.

[0055] Further, instead of the second connecting portion 41 in the second embodiment, the second connecting portion 40 in the first embodiment may be provided. When the second connecting portion 40 in the first embodiment is provided in the second embodiment, the second connecting portion 40 may be provided not as a single one but as a plurality (for example, two) spaced apart in the seat width direction. Further, in the first embodiment, the front upper portion 32 itself may be formed in a cylindrical shape to form a pair of cylindrical portions 39, and the rear upper portion 36 itself may be formed in a cylindrical shape to form a pair of cylindrical portions 39.

[0056] Also, in the first embodiment, the second connecting portion 40 may be configured to connect the central portion in the sheet width direction of the front upper portion 32 of the first connecting portion 30 and the central portion in the sheet width direction of the rear upper portion 36. In that case, the front end portion and the rear end portion of the second connecting portion 40 may be joined to the front upper portion 32 and the rear upper portion 36, respectively, by an adhesive or the like, or the second connecting portion 40, the front upper portion 32, and the rear upper portion 36 (the first connecting portion 30) may be integrally formed.

Explanation of Signs

[0057] 10 Vehicle seat 12 Seat cushion 14 Front panel 16 Frame (support member) 20 Cushion spring 22 First cushion spring 22B Rear end portion 26 Second cushion spring 26F Front end portion 30 First connecting portion 31 First connecting portion 32 Front upper portion 33 Front lower portion 34 Side portion 35 Rear lower portion 36 Rear upper portion 37 Plate-like member 40 Second connecting portion 41 Second connecting portion 42 Weak portion

Claims

1. A front panel provided at the front part of the seat cushion, A support member provided at the rear part of the seat cushion, A cushion spring installed between the front panel and the support member, comprising: The cushion spring A first cushion spring attached to the front panel, A second cushion spring attached to the support member, A resin-made first connecting part formed in a substantially "U" shape when viewed from the seat width direction, connecting the rear end part of the first cushion spring and the front end part of the second cushion spring, A resin-made second connecting part that connects the rear end part of the first cushion spring and the front end part of the second cushion spring and is broken by the load input during a frontal collision of the vehicle, A vehicle seat having the above.

2. The cushion spring is formed in a substantially corrugated shape in plan view, The vehicle seat according to claim 1, wherein the second connecting part connects the central part in the seat width direction at the rear end part of the first cushion spring and the central part in the seat width direction at the front end part of the second cushion spring.

3. The first connecting part A pair of side parts formed in a substantially "U" shape when viewed from the seat width direction, An upper front part that connects the upper end parts on the seat front side of the side parts in the seat width direction and is attached to the rear end part of the first cushion spring, An upper rear part that connects the upper end parts on the seat rear side of the side parts in the seat width direction and is attached to the front end part of the second cushion spring, A lower front part that connects the lower parts on the seat front side of the side parts in the seat width direction, A lower rear part that connects the lower parts on the seat rear side of the side parts in the seat width direction, The vehicle seat according to claim 2, comprising the above. Claim 4 The first connecting portion is formed in a substantially "U" shape when viewed in the seat width direction, and is composed of a pair of plate-like members that connect both ends in the seat width direction at the rear end portion of the first cushion spring and both ends in the seat width direction at the front end portion of the second cushion spring, respectively. The vehicle seat according to claim 2. Claim 5 The second connecting portion has a vulnerable portion at the center in the seat front-rear direction. The vehicle seat according to any one of claims 2 to 4.

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