Vehicle seat frame and vehicle seat

Abstract

To inhibit occurrence of a submarine phenomenon during a frontal collision and improve impact absorption performance.SOLUTION: A vehicular seat frame 30 includes: a seat cushion frame 32 forming a framework of a seat cushion 12 on which an occupant of a vehicle is seated and having left and right side frames 34 disposed at left and right sides of the seat cushion 12; left and right front links 62 which are respectively connected at one end parts to front parts of the left and right side frames 34; a connection pipe 68 which connects the left and right front links 62 in a seat lateral direction; left and right slide rails 50 disposed below the left and right side frames 34 and attached to a floor part of a vehicle; and left and right front risers 58 which are attached to the left and right slide rails 50 and connected with the other end parts of the left and right front links 62 and have left and right butted parts 58C on which the connection pipe 68 is abutted by a load from the occupant during a frontal collision of the vehicle.SELECTED DRAWING: Figure 3

Description

Technical Field

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

Background Art

[0002] In the vehicle seat described in Patent Document 1 below, the left and right frame sides of the seat cushion frame and the left and right movable rails of the seat track are connected via the left and right frame support brackets. A substantially inverted U-shaped strut pipe is disposed between the left and right frame support brackets. Both ends of the strut pipe are supported by the front end portions of the movable rails, and the strut top of the strut pipe is fixed to the lower surface of the front panel of the seat cushion frame. During a frontal collision, the input from the occupant restrained by the seat belt is transmitted from the front panel and the left and right frame sides to the vehicle floor via the strut pipe and the seat track, and the front side of the seat cushion is kept in a normal state. Thereby, it is said that the submarine phenomenon occurring to the occupant can be suppressed beforehand.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above prior art, the front portion of the seat cushion frame is reinforced by the above strut pipe. As a result, since the deformation of the front portion of the seat cushion frame during a frontal collision is suppressed, it becomes difficult to absorb the impact applied to the occupant from the front portion of the seat cushion frame. Therefore, there is room for improvement from the viewpoint of improving impact absorbability.

[0005] In view of the above facts, an object of the present invention is to provide a vehicle seat frame and a vehicle seat that can improve impact absorbency while suppressing the occurrence of the submarine phenomenon during a frontal collision.

Means for Solving the Problems

[0006] The vehicle seat frame according to the first aspect of the present invention constitutes a skeleton of a seat cushion on which an occupant of a vehicle sits, and includes a seat cushion frame having left and right side frames disposed on left and right side portions of the seat cushion, left and right links each having one end connected to a front portion of the left and right side frames, a connecting member connecting the left and right links in the left-right direction of the seat, left and right slide rails disposed below the left and right side frames and attached to a floor portion of the vehicle, and left and right risers attached to the left and right slide rails, each having the other end of the left and right links connected thereto and having left and right abutting portions that are abutted by a load from the occupant during a frontal collision of the vehicle.

[0007] According to the first aspect, the seat cushion frame constituting the skeleton of the seat cushion has left and right side frames disposed on left and right side portions of the seat cushion. One end of each of the left and right links is connected to the front portion of the left and right side frames. The left and right links are connected in the left-right direction of the seat by a connecting member. Left and right slide rails are disposed below the left and right side frames. The left and right slide rails are attached to a floor portion of the vehicle. Left and right risers are attached to the left and right slide rails. The other end of each of the left and right links is connected to the left and right risers, and left and right abutting portions are provided.

[0008] In the event of a frontal collision of the vehicle, the connecting member is abutted against the left and right abutting portions by the load from the occupant wearing the seat belt. As a result, the sinking of the seat cushion is suppressed, and the reaction force applied to the occupant from the front portion of the seat cushion increases, so that the occurrence of the submarine phenomenon can be suppressed. Moreover, unlike the prior art described in the background art section, since the front portion of the seat cushion frame is not reinforced by a strut pipe, the front portion of the seat cushion frame can be deformed as the load applied to the front portion of the seat cushion frame from the occupant increases. Thereby, the shock absorbency can be improved.

[0009] In the vehicle seat frame according to the second aspect of the present invention, in the first aspect, the seat cushion frame includes a cushion pan that connects upper end portions of front portions of the left and right side frames in the left - right direction of the seat, and a reinforcing member including left and right reinforcing portions that are fixed to both sides in the left - right direction of the seat at the rear end portion of the cushion pan and reinforce the fixed portions.

[0010] According to the second aspect, the upper end portions of the front portions of the left and right side frames of the seat cushion frame are connected in the left - right direction of the seat by the cushion pan. On both sides in the left - right direction of the seat at the rear end portion of the cushion pan, the left and right reinforcing portions included in the reinforcing member are fixed, and the portions where each reinforcing portion is fixed are reinforced. For this reason, at the initial stage of a frontal collision, deformation of the cushion pan due to the load applied to the cushion pan from the occupant's buttocks is suppressed. As a result, at the initial stage of a frontal collision, the reaction force applied to the occupant from the cushion pan increases, so that the effect of suppressing the occurrence of the submarine phenomenon can be improved. Thereafter, the cushion pan deforms from the central side in the left - right direction of the seat that is not reinforced by the left and right reinforcing portions. Thereby, the effect of improving the shock absorbency can be ensured.

[0011] In the vehicle seat frame according to the third aspect of the present invention, in the second aspect, the reinforcing member includes a connecting portion that connects the left and right reinforcing portions in the left - right direction of the seat.

[0012] According to the third aspect, since the left and right reinforcing portions of the reinforcing member are connected in the left-right direction of the seat by the connecting portion, the reinforcing member can be made into a single part. As a result, it becomes easier to reduce the manufacturing cost compared to the case where the reinforcing member is composed of two parts. Moreover, at the initial stage of a frontal collision, since the reaction force from the connecting portion is also applied to the occupant's buttocks, the effect of suppressing the occurrence of the submarine phenomenon can be further improved.

[0013] The vehicle seat frame according to the fourth aspect of the present invention is, in any one of the first to third aspects, wherein the seat cushion frame includes a cushion pan that connects upper end portions of front parts of the left and right side frames in the left-right direction of the seat, and left and right reinforcing patches that are fixed to side surfaces in the left-right direction of the front parts of the left and right side frames on the front side of the seat with respect to one end portions of the left and right links, and reinforce the fixed portions.

[0014] According to the fourth aspect, the upper end portions of the front parts of the left and right side frames of the seat cushion frame are connected in the left-right direction of the seat by the cushion pan. Also, on side surfaces in the left-right direction of the front parts of the left and right side frames, the left and right reinforcing patches are fixed on the front side of the seat with respect to one end portions of the left and right links, and the portions where the respective reinforcing patches are fixed are reinforced. Thereby, at the initial stage of a frontal collision, when a load from the occupant is applied to the front parts of the left and right side frames via the cushion pan, deformation of the left and right side frames so as to fall inward in the left-right direction of the seat is suppressed. As a result, since the reaction force applied to the occupant at the initial stage of a frontal collision increases, the effect of suppressing the occurrence of the submarine phenomenon can be further improved.

[0015] The vehicle seat according to the fifth aspect of the present invention includes a seat cushion on which an occupant sits and a seat back that supports the occupant's back to serve as a backrest, and a skeleton is constituted by the vehicle seat frame according to any one of the first to fourth aspects.

[0016] According to the fifth aspect, the skeleton of the vehicle seat including the seat cushion and the seat back is constituted by the vehicle seat frame according to any one of the first aspect to the fourth aspect. Therefore, the same effects as any one of the first aspect to the fourth aspect can be obtained.

Effects of the Invention

[0017] As described above, in the vehicle seat frame and the vehicle seat according to the present invention, it is possible to improve the shock absorbability while suppressing the occurrence of the submarine phenomenon during a frontal collision.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7A

Figure 7B

Figure 8

Figure 9

Figure 10A

Figure 10B

Figure 10C

Mode for Carrying Out the Invention

[0019] Hereinafter, a vehicle seat 10 and a vehicle seat frame 30 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10C. In each figure, some reference numerals may be omitted for ease of viewing the drawings. Also, the arrow FR appropriately shown in each figure indicates the front of the vehicle, the arrow UP indicates the upper part of the vehicle, the arrow LH indicates the left side of the vehicle, and the arrow RH indicates the right side of the vehicle. Hereinafter, when explaining using the front-rear, left-right, and up-down directions, unless otherwise specified, the front and rear in the vehicle front-rear direction, the left and right in the vehicle left-right direction (vehicle width direction), and the up and down in the vehicle up-down direction are indicated.

[0020] As shown in FIGS. 10A to 10C, the vehicle seat 10 according to the present embodiment includes a seat cushion 12 on which an occupant P of the vehicle sits, a seat back 14 that supports the back of the occupant P and serves as a backrest, and a headrest 16 that supports the head of the occupant P. The front-rear direction, left-right direction (width direction), and up-down direction of this vehicle seat 10 coincide with the front-rear, left-right, and up-down directions of the vehicle. The occupant P shown in FIGS. 10A to 10C is, for example, AM50 of HYBRIDIII, which is a dummy for a frontal collision test (50th percentile of American adult males). This occupant P is wearing a three-point seat belt 18 mounted on a vehicle (not shown).

[0021] The framework of the vehicle seat 10 is constituted by the vehicle seat frame 30 shown in FIGS. 1 to 3. This vehicle seat frame 30 has a seat cushion frame 32 that constitutes the framework of the seat cushion 12 and a seat back frame 40 that constitutes the framework of the seat back 14. Pad materials (not shown) covered by the skin 13, 15 (see FIGS. 10A to 10C) are attached to the seat cushion frame 32 and the seat back frame 40, respectively.

[0022] The seat cushion frame 32 includes a pair of left and right side frames 34 that are arranged on the left and right side portions of the seat cushion 12 and extend in the front-rear direction of the seat, a cushion pan 36 that is spanned between the upper end portions at the front parts of the left and right side frames 34, and a rear frame 38 that is spanned between the rear end portions of the left and right side frames 34. A seat cushion spring (not shown) is spanned between the cushion pan 36 and the rear frame 38. By this seat cushion spring, the pad material of the seat cushion 12 is elastically supported from below the seat.

[0023] The left and right side frames 34 are formed in a long shape by, for example, press molding a sheet metal, and are arranged in a posture where the longitudinal direction is along the front-rear direction of the seat and the thickness direction is along the left-right direction of the seat. The cushion pan 36 is formed in a substantially rectangular shape by, for example, a sheet metal, and is arranged in a posture where the thickness direction is along the up-down direction of the seat, and both end portions in the left-right direction of the seat are fixed to the front parts of the left and right side frames 34 by means such as welding. The rear frame 38 is formed by, for example, a metal pipe, and is arranged in a posture where the axial direction is along the left-right direction of the seat, and both end portions in the left-right direction of the seat are rotatably connected to the rear end parts of the left and right side frames 34 by means such as caulking.

[0024] At the rear ends of the left and right side frames 34, the lower end of the seat back frame 40 is reclinably connected via a well-known reclining mechanism 46. The seat back frame 40 includes a pair of left and right side frames 42 disposed on the left and right sides of the seat back 14 and extending in the seat up and down direction, an upper frame (not shown) spanned between the upper ends of the left and right side frames 42, and a lower frame 44 spanned between the lower ends of the left and right side frames 42. A headrest 16 is connected to the upper frame described above.

[0025] The left and right side frames 34 of the seat cushion frame 32 are connected to the vehicle floor via a well-known slide mechanism 48 and lifter mechanism 56, and the front-rear position and up-down position with respect to the vehicle floor are adjustable. The slide mechanism 48 includes a pair of left and right slide rails 50 disposed below the left and right side frames 34. The slide rail 50 includes a lower rail 52 fixed to the vehicle floor by means such as bolt fastening, an upper rail 54 slidably supported in the front-rear direction with respect to the lower rail 52, and a lock mechanism (not shown) for regulating the slide of the upper rail 54 with respect to the lower rail 52. The lower rail 52 and the upper rail 54 are arranged with the front-rear direction as the longitudinal direction.

[0026] The lifter mechanism 56 includes a pair of left and right front lifters 58 (see FIGS. 1 to 3), a pair of left and right rear lifters 60 (see FIGS. 1 and 2), a pair of left and right front links 62 (see FIGS. 2 and 3), and a pair of left and right rear links 64 (see FIG. 2; the right rear link 64 is not shown). The left and right front lifters 58, the left and right rear lifters 60, the left and right front links 62, and the left and right rear links 64 are, for example, manufactured by press molding sheet metal. The left and right front lifters 58 correspond to the "left and right lifters" in the present invention, and the left and right front links 62 correspond to the "left and right links" in the present invention.

[0027] As shown in FIG. 3, the left and right front risers 58 each have a front fixing portion 58A fixed by means such as bolt fastening to the upper surface of the front end portion of the left and right upper apparels 54, a front vertical wall portion 58B extending upward from the inner end portion in the left - right direction of the front fixing portion 58A, and an abutting portion 58C extending inward in the left - right direction from the upper end portion of the front vertical wall portion 58B. Although illustration is omitted, the left and right rear risers 60 each have a rear fixing portion fixed by means such as bolt fastening to the upper surface of the rear end portion of the left and right upper apparels 54, and a rear vertical wall portion extending upward from one end portion in the left - right direction of the rear fixing portion.

[0028] The left and right front links 62 and the left and right rear links 64 are arranged in a posture inclined rearward. One end portion (each upper end portion) of each of the left and right front links 62 is overlapped with the front portion of the left and right side frames 34 from the inner side in the left - right direction, and is rotatably connected to the front portion of the left and right side frames 34 via a connecting shaft 65 having the left - right direction as the axial direction. The other end portion (each lower end portion) of each of the left and right front links 62 is overlapped with the front vertical wall portion 58B of the left and right front risers 58 from the outer side in the left - right direction, and is rotatably connected to each front vertical wall portion 58B via a connecting shaft 66 having the left - right direction as the axial direction.

[0029] One end portion (each upper end portion) of each of the left and right rear links 64 is arranged on the inner side in the left - right direction with respect to the rear portion of the left and right side frames 34, and is fixed to the rear frame 38. Thereby, the left and right rear links 64 are rotatably connected to the left and right side frames 34 via the rear frame 38. The other end portion (each lower end portion) of each of the left and right rear links 64 is overlapped with the rear vertical wall portion of the left and right rear risers 60 from one side in the left - right direction, and is rotatably connected to each rear vertical wall portion via a connecting shaft (not shown) having the left - right direction as the axial direction.

[0030] On one of the left and right rear links 64, for example, a sector gear is formed, and when a pinion (not shown) meshed with the sector gear is rotated manually or electrically, the one rear link 64 is rotated. As a result, the left and right rear links 64 and the left and right front links 62 are rotated, and the vertical position of the seat cushion frame 32 (that is, the seat cushion 12) is changed.

[0031] The left and right front links 62 are connected in the left - right direction by a connecting pipe 68 which is a connecting member. The connecting pipe 68 is constituted by, for example, a metal pipe material and is arranged with the left - right direction as the axial direction. Both axial ends of the connecting pipe 68 are inserted into through - holes 70 (see FIG. 4) formed in the middle portions of the left and right front links 62 and are fixed to the left and right front links 62 by means such as welding.

[0032] As shown in FIGS. 3 and 4, both axial ends of the connecting pipe 68 are arranged slightly spaced apart from the respective abutting portions 58C of the left and right front risers 58 on the diagonally rearward side on the seat. As shown in FIG. 3, each abutting portion 58C has an inclined portion 58C1 in which the front - side portion is inclined downward toward the rear - side portion and a horizontal portion 58C2 in which the rear - side portion extends horizontally. Even when the connecting pipe 68 rotates together with the left and right front links 62, a slight gap is ensured between the connecting pipe 68 and each abutting portion 58C.

[0033] However, during a frontal collision of the vehicle, due to an excessive load acting obliquely downward and forward from the buttocks of the occupant P (see FIGS. 10A to 10C) wearing the seat belt 18 onto the seat cushion 12, the connecting pipe 68 is abutted against the left and right abutting portions 58C (see FIG. 5). This abutment is caused by slight deformation of the left and right front links 62 and the like due to the above load. The above frontal collision is a collision similar to, for example, a full lap frontal collision test (against a rigid barrier, speed 35 mph: approximately 56 km / h) defined by the National Highway Traffic Safety Administration (NHTSA) of the United States Department of Transportation. At the initial stage of this frontal collision (see FIG. 10B), a relatively low load is applied from the occupant P to the seat cushion 12, and at the later stage of this frontal collision (see FIG. 10C), a relatively high load is applied from the occupant P to the seat cushion 12. At the initial stage of this frontal collision, a gap between the connecting pipe 68 and each abutting portion 58C in the normal state is set so that the connecting pipe 68 is abutted against the left and right abutting portions 58C.

[0034] Further, in the present embodiment, as shown in FIG. 1, the seat cushion frame 32 has a reinforcing member 72 fixed to the rear end portion of the cushion pan 36. This reinforcing member 72 is manufactured, for example, by press-molding a sheet metal, and has a pair of left and right reinforcing portions 72A and a connecting portion 72B. The left and right reinforcing portions 72A are fixed to both sides in the left-right direction at the rear end portion of the cushion pan 36 and reinforce the fixed portions. The connecting portion 72B connects the left and right reinforcing portions 72A in the left-right direction.

[0035] As shown in FIG. 6, the left and right reinforcing portions 72A have, as an example, a fixing portion 72A1, a downward extending portion 72A2, a rearward extending portion 72A3, and a fixing piece 72A4. The fixing portion 72A1 is fixed to the upper surface of the rear end portion of the cushion pan 36 by means such as welding. The downward extending portion 72A2 extends downward from the central portion in the left - right direction of the rear end of the fixing portion 72A1. The rearward extending portion 72A3 extends rearward from the lower end of the downward extending portion 72A2. The rearward extending portions 72A3 of the left and right reinforcing portions 72A are connected in the left - right direction by a connecting portion 72B and are integrally formed with the connecting portion 72B. The fixing piece 72A4 extends downward from the central portion in the left - right direction of the front end of the fixing portion 72A1. The lower side of the fixing piece 72A4 is bent forward. This fixing piece 72A4 is inserted into a hole (not shown) formed in the cushion pan 36 and is fixed to the cushion pan 36 by means such as welding.

[0036] The reinforcing member 72 having the above configuration is a deformation amount adjusting member for adjusting the deformation amount of the cushion pan 36 during a frontal collision. The left and right reinforcing portions 72A are arranged at positions facing upward from the front side with respect to the left and right ischia (not shown) of the occupant P. Therefore, during a frontal collision, loads from the left and right ischia of the occupant P are input to the portions of the cushion pan 36 where the left and right reinforcing portions 72A are fixed. As shown in FIG. 7A, at the initial stage of a frontal collision, the deformation (sinking downward) of the cushion pan 36 is suppressed by the left and right reinforcing portions 72A. At the later stage of a frontal collision, as the loads applied to the cushion pan 36 from the left and right ischia of the occupant P increase, the cushion pan 36 deforms as shown in FIG. 7B.

[0037] Furthermore, in the present embodiment, as shown in FIG. 8, the seat cushion frame 32 has left and right reinforcing patches 74 fixed to the left - right direction side surfaces (here, the inner surfaces) of the front portions of the left and right side frames 34. The left and right reinforcing patches 74 are arranged on the front side of one end portion (upper end portion) of the left and right front links 62 connected to the front portions of the left and right side frames 34.

[0038] Each reinforcing patch 74 is, for example, manufactured by press-forming sheet metal. Each reinforcing patch 74 has, as an example, a patch body 74A superposed on the left and right inner side surfaces in the front part of each side frame 34, and an upper flange 74B extending inward in the left and right direction from the upper end of the patch body 74A. An upper flange 34A extending inward in the left and right direction is formed at the upper end of each side frame 34, and the upper flange 74B of each reinforcing patch 74 is superposed on the lower surface of the upper flange 34A. These reinforcing patches 74 are fixed to the front part of each side frame 34 by means such as welding, and the front part of each side frame 34 is reinforced at the site where each reinforcing patch 74 is fixed. Note that the configuration may be such that each reinforcing patch 74 is fixed to the left and right outer side surfaces in the front part of each side frame 34. Also, the shape of each reinforcing patch 74 can be changed as appropriate.

[0039] The left and right reinforcing patches 74 with the above configuration are reinforcing members for suppressing the deformation (falling inward) of the front parts of the left and right side frames 34 inward in the left and right direction due to the load F (see FIG. 9) from the occupant applied to the cushion pan 36 during a frontal collision. Due to this deformation suppression, the reaction force applied to the buttocks of the occupant P from the front part of the seat cushion 12 is increased at the initial stage of the frontal collision.

[0040] (Operation and Effect) Next, the operation and effect of this embodiment will be described.

[0041] In the vehicle seat 10 configured as described above, the seat cushion frame 32 that constitutes the skeleton of the seat cushion 12 has left and right side frames 34 disposed on the left and right side portions of the seat cushion 12. At the front portions of the left and right side frames 34, one end portion of each of the left and right front links 62 is connected. The left and right front links 62 are connected in the left - right direction by a connecting pipe 68. Below the left and right side frames 34, left and right slide rails 50 are disposed. The left and right slide rails 50 are attached to the floor portion of the vehicle. To the left and right slide rails 50, left and right front risers 58 are attached. To the left and right front risers 58, the other end portion of each of the left and right front links 62 is connected, and left and right abutting portions 58C are provided.

[0042] In the initial stage of a frontal collision of the vehicle (see FIG. 10B), the connecting pipe 68 is abutted against the left and right abutting portions 58C by the load from the occupant P wearing the seat belt 18. As a result, in the initial stage of the frontal collision, the sinking of the seat cushion 12 is suppressed, and the reaction force applied to the occupant P from the front portion of the seat cushion 12 increases. Consequently, the inertial movement of the occupant P forward in the vehicle is suppressed, and the restraint of the occupant P's waist by the lap belt 18A of the seat belt 18 is maintained, so that the occurrence of the submarining phenomenon can be effectively suppressed. Moreover, unlike the prior art described in the background art section, the front portion of the seat cushion frame 32 is not reinforced by a strut pipe. For this reason, as shown in FIG. 10C, in the later stage of the frontal collision, as the load applied to the front portion of the seat cushion frame 32 from the occupant P increases, the front portion of the seat cushion frame 32 can be deformed. Thereby, the impact absorbability can be improved. As a result, the injury value of the occupant P can be reduced.

[0043] Further, in the present embodiment, a reinforcing member 72 is provided which is fixed to the rear end portion of the cushion pan 36 of the seat cushion frame 32. The reinforcing member 72 includes left and right reinforcing portions 72A fixed to both sides in the left - right direction of the seat at the rear end portion of the cushion pan 36, and the portions of the cushion pan 36 where the left and right reinforcing portions 72A are fixed are reinforced. Therefore, at the initial stage of a frontal collision (see FIG. 10B), deformation of the cushion pan 36 due to the load applied to the cushion pan 36 from the buttocks of the occupant P is suppressed. As a result, at the initial stage of a frontal collision, the reaction force applied to the occupant P from the cushion pan 36 increases, so the effect of suppressing the forward movement of the occupant P is improved, and the effect of suppressing the occurrence of the submarining phenomenon is improved. On the other hand, at the later stage of a frontal collision (see FIG. 10C), the load applied from the occupant P to the front portion of the seat cushion frame 32 increases. As a result, the cushion pan 36 deforms from the central side in the left - right direction of the seat which is not reinforced by the left and right reinforcing portions 72A. Thereby, the effect of improving the shock - absorbing property can be ensured.

[0044] Further, in the present embodiment, since the left and right reinforcing portions 72A of the reinforcing member 72 are connected in the left - right direction of the seat by a connecting portion 72B, the reinforcing member 72 can be made into one part. As a result, it becomes easier to reduce the manufacturing cost compared to the case where the reinforcing member 72 is composed of two parts. Moreover, at the initial stage of a frontal collision, since the reaction force from the connecting portion 72B is also applied to the buttocks of the occupant P, the effect of suppressing the occurrence of the submarining phenomenon can be further improved.

[0045] Furthermore, in the present embodiment, on the side surfaces in the left - right direction of the seat at the front portions of the left - and - right side frames 34 of the seat cushion frame 32, left - and - right reinforcing patches 74 are fixed on the seat front - side of one - end portions of the left - and - right front links 62, and the portions where the respective reinforcing patches 74 are fixed are reinforced. Thereby, at the initial stage of a frontal collision, when a load from the occupant P is applied to the front portions of the left - and - right side frames 34 via the cushion pan 36, deformation such that the left - and - right side frames 34 fall inward in the left - right direction of the seat is suppressed. As a result, since the reaction force applied to the occupant P at the initial stage of the frontal collision increases, the effect of suppressing the occurrence of the submarine phenomenon can be further improved.

[0046] In the above - described embodiment, the reinforcing member 72 fixed to the rear - end portion of the cushion pan 36 has a configuration including a connecting portion 72B that connects the left - and - right reinforcing portions 72A. However, the present invention is not limited to this, and the reinforcing member 72 may have a configuration without the connecting portion 72B.

[0047] Also, in the above - described embodiment, the seat cushion frame 32 has a configuration including the reinforcing member 72 and the left - and - right reinforcing patches 74. However, the present invention is not limited to this, and the seat cushion frame 32 may have a configuration without both or one of the reinforcing member 72 and the reinforcing patch 74.

[0048] Also, in the above - described embodiment, the connecting pipe 68 as the connecting member is configured to be manufactured by a metal pipe. However, the present invention is not limited to this, and the material of the connecting member can be changed as appropriate.

[0049] In addition, the present invention can be implemented with various modifications without departing from the gist thereof. Of course, the scope of rights of the present invention is not limited to the above - described embodiment.

Explanation of Reference Numerals

[0050] 10 Vehicle seat 12 Seat cushion 14 Seat back 30 Vehicle seat frame 32 Seat cushion frame 34 Side frame 36 Cushion pan 50 Slide rail 58 Front riser 58C Stop portion 62 Front link 68 Connecting pipe (connecting member) 72 Reinforcing member 72A Reinforcing part 72B Connecting part 74 Reinforcing patch

Claims

1. A seat cushion frame that constitutes the skeleton of a seat cushion on which a vehicle occupant sits and has left and right side frames disposed on the left and right side portions of the seat cushion, Left and right links each having one end connected to the front portions of the left and right side frames, A connecting member that connects the left and right links in the left - right direction of the seat, Left and right slide rails disposed below the left and right side frames and attached to the floor portion of the vehicle, Left and right risers attached to the left and right slide rails, to which the other ends of the left and right links are connected and having left and right abutting portions against which the connecting member is abutted by the load from the occupant during a frontal collision of the vehicle, A vehicle seat frame comprising the above.

2. The seat cushion frame is, A cushion pan that connects the upper end portions of the front portions of the left and right side frames in the left - right direction of the seat, A reinforcing member including left and right reinforcing portions fixed to both sides in the left - right direction of the seat at the rear end portion of the cushion pan and reinforcing the fixed portions, The vehicle seat frame according to Claim 1, having the above.

3. The vehicle seat frame according to Claim 2, wherein the reinforcing member includes a connecting portion that connects the left and right reinforcing portions in the left - right direction of the seat.

4. The seat cushion frame is, A cushion pan that connects the upper end portions of the front portions of the left and right side frames in the left - right direction of the seat, Left and right reinforcing patches fixed to the side surfaces in the left - right direction of the front portions of the left and right side frames on the front side of the seat with respect to one end portions of the left and right links and reinforcing the fixed portions, The vehicle seat frame according to any one of Claims 1 to 3, having the above.

5. A vehicle seat including a seat cushion on which an occupant sits and a seat back that supports the occupant's back and serves as a backrest, and having a skeleton constituted by the vehicle seat frame according to any one of Claims 1 to 4.

Images