Seat cushion frame, vehicle seat frame and vehicle seat

Abstract

To inhibit occurrence of a submarine phenomenon during a frontal collision and secure impact absorption performance.SOLUTION: A seat cushion frame 30 forms a framework of a seat cushion 12 on which an occupant of a vehicle is seated and includes: left and right side frames 34 disposed at left and right side parts of the seat cushion 12; and a cushion pan 36 which connects upper end parts of front parts of the left and right side frames 34 in a seat lateral direction and is locally weakened at a through hole 37 provided at a center as seen in the seat lateral direction of a rear end part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] The automobile seat described in Patent Document 1 below includes a seat belt connected to an emergency locking retractor and a seat cushion formed by mounting a cushioning material on a seat cushion frame. A receiving portion extending in the width direction is disposed at a lower portion rearward of the front end of the seat cushion, and a panel portion is disposed forward of the receiving portion on the seat cushion frame. A folding portion is provided in a portion of the panel portion forward of the receiving portion, which is folded downward when a certain amount of pressure or more is applied from above. This folding portion is positioned below the occupant's waist when the seat belt is locked.

[0003] According to the above configuration, when the vehicle suddenly decelerates, the occupant's lower back, which tends to move forward, is appropriately received by the receiving portion, and the seat belt connected to the emergency locking retractor prevents the occupant's chest from leaning forward. When the occupant's chest is prevented from leaning forward, the submarine phenomenon occurs, in which the occupant's lower back sinks into the seat cushion and moves forward. However, because the receiving portion appropriately receives the lower back that tends to move forward, the sudden forward movement of the lower back due to the submarine phenomenon is also prevented. Then, when the seat belt is locked, the lower back, which has climbed over the receiving portion, is elastically received by the retractable portion provided on the panel portion in front of the retractable portion and falls downward with the fixed portion of the seat belt as a fulcrum. This effectively absorbs impact energy in the retractable portion, effectively reducing the harm to the occupant during sudden deceleration. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4936823 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned prior art, the lumbar region of the occupant who climbs over the receiving portion of the seat cushion frame is received by a retractable portion provided on the panel portion in front of the receiving portion, which causes a large forward movement of the lumbar region of the occupant. Therefore, there is room for improvement in terms of suppressing the forward movement of the lumbar region of the occupant.

[0006] In consideration of the above, the present invention aims to provide a seat cushion frame, a vehicle seat frame, and a vehicle seat that can suppress forward movement of an occupant's lower back during a frontal collision while ensuring impact absorption. [Means for solving the problem]

[0007] The seat cushion frame of the first aspect of the present invention is a seat cushion frame that forms the skeleton of a seat cushion on which a vehicle occupant sits, and includes left and right side frames that are arranged on the left and right sides of the seat cushion, and a cushion pan that connects the upper ends of the front parts of the left and right side frames in the left-right direction of the seat and is locally weakened at a weak part provided in the center of the rear end in the left-right direction of the seat.

[0008] According to a first aspect, a seat cushion frame that forms the framework of a seat cushion on which a vehicle occupant sits includes left and right side frames and a cushion pan. The left and right side frames are disposed on the left and right sides of the seat cushion. The cushion pan connects the upper ends of the front portions of the left and right side frames in the left-right direction of the seat. The cushion pan is locally weakened at a weakened portion provided in the center of the rear end in the left-right direction of the seat.

[0009] In the early stages of a frontal collision, the load applied from the occupant's buttocks to the cushion pan is low, so the reaction force applied from the cushion pan to the occupant's buttocks can prevent the submarine phenomenon from occurring. In the later stages of a frontal collision, the load applied from the occupant's buttocks to the cushion pan increases, causing the cushion pan to deform (bend) starting from the weak portion. This ensures impact absorption. Moreover, unlike the automobile seats described in the Background Art section, this seat is not configured to receive the occupant's lower back (buttocks) that has climbed over the receiving portion of the seat cushion frame with a folding portion, so forward movement of the occupant's lower back can be prevented.

[0010] In a second aspect of the present invention, in the seat cushion frame of the first aspect, the weakened portion is a hole or a notch that penetrates the rear end portion of the cushion pan.

[0011] In the second aspect, for example, by forming the above-mentioned hole or notch in the rear end portion of an existing cushion pan, a cushion pan provided with a weakened portion can be easily manufactured.

[0012] A third aspect of the seat cushion frame of the present invention is the first or second aspect, in which the left and right side frames are connected to the floor of the vehicle via left and right links each having one end connected to the front of the left and right side frames, left and right risers each having the other end connected to the left and right links, and left and right slide rails to which the left and right risers are attached, and a connecting member connecting the left and right links in the left-right direction of the seat is arranged below the rear of the cushion pan with a gap therebetween.

[0013] According to a third aspect, one end of each of the left and right links is connected to the front portions of the left and right side frames of the seat cushion frame. The other end of each of the left and right links is connected to the left and right risers, which are attached to the left and right slide rails. The left and right side frames are then connected to the vehicle floor via the left and right links, the left and right risers, and the left and right slide rails. The left and right links are connected in the left-right direction of the seat by a connecting member, which is disposed below the rear portion of the cushion pan with a gap therebetween. Therefore, even in a configuration in which the connecting member is disposed below the rear portion of the cushion pan, space can be secured for the cushion pan to deform starting from the weak portion.

[0014] A fourth aspect of the present invention provides a vehicle seat frame comprising a seat cushion frame according to any one of the first to third aspects, left and right slide rails arranged below the left and right side frames of the seat cushion frame and attached to a floor of the vehicle, left and right risers attached to the left and right slide rails, and left and right links each having one end connected to a front of the left and right side frames and the other end connected to the left and right risers.

[0015] According to a fourth aspect, the seat cushion frame has left and right side frames. One end of each of left and right links is connected to the front of the left and right side frames. Left and right slide rails attached to the floor of the vehicle are arranged below the left and right side frames. Left and right risers are attached to the left and right slide rails, to which the other end of each of the left and right links is connected. The above seat cushion frame is the seat cushion frame of any one of the first to third aspects. Therefore, the same effect as that of any one of the first to third aspects can be obtained.

[0016] A vehicle seat according to a fifth aspect of the present invention comprises a seat cushion on which an occupant sits and a seat back that supports the back of the occupant and serves as a backrest, and the skeleton of the seat cushion is formed by a seat cushion frame according to any one of the first to third aspects.

[0017] According to the fifth aspect, a vehicle seat including a seat cushion and a seat back has a frame of the seat cushion formed by the seat cushion frame of any one of the first to third aspects, thereby achieving the same effect as any one of the first to third aspects. [Effects of the Invention]

[0018] As described above, the seat cushion frame, vehicle seat frame, and vehicle seat according to the present invention can ensure impact absorption while suppressing the occurrence of the submarine phenomenon during a frontal collision. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a perspective view showing the periphery of a seat cushion frame in a vehicle seat frame according to an embodiment, as viewed from above and diagonally in front of the left of the seat. FIG. [Figure 2] 2 is a perspective view showing the periphery of a seat cushion frame in the vehicle seat frame as viewed from below and diagonally in front of the right of the seat. FIG. [Figure 3] 2 is a perspective view showing the periphery of a front portion of a seat cushion frame in the vehicle seat frame, as viewed diagonally from the front left side of the seat. FIG. [Figure 4] 2 is a bottom view showing the periphery of a front portion of a seat cushion frame in the vehicle seat frame as viewed from below the seat. FIG. [Figure 5] FIG. [Figure 6] 10 is a perspective view showing a state in which the cushion pan is deformed, as viewed from above and diagonally rear left of the seat. FIG. [Figure 7]7 is a cross-sectional view corresponding to the cross section taken along line F7-F7 in FIG. 4. [Figure 8A] 1 is a side view showing a vehicle seat according to an embodiment, illustrating a state before a frontal collision; [Figure 8B] FIG. 8B is a side view corresponding to FIG. 8A, showing a state at the beginning of a frontal collision. [Figure 8C] FIG. 8C is a side view corresponding to FIGS. 8A and 8B, showing a state in the later stage of a frontal collision. DETAILED DESCRIPTION OF THE INVENTION

[0020] A vehicle seat 10, a vehicle seat frame 30, and a seat cushion frame 32 according to one embodiment of the present invention will be described below with reference to Figures 1 to 8C. Note that in each figure, some reference numerals may be omitted to make the drawings easier to understand. Also, an arrow FR shown as appropriate in each figure indicates the front of the vehicle, an arrow UP indicates the upper side of the vehicle, an arrow LH indicates the left side of the vehicle, and an arrow RH indicates the right side of the vehicle. Hereinafter, when the front-rear, left-right, up-down directions are used in the description, they refer to front and rear in the front-rear direction of the vehicle, left and right in the left-right direction of the vehicle (vehicle width direction), and up and down in the up-down direction of the vehicle, unless otherwise specified.

[0021] As shown in FIGS. 8A to 8C, a vehicle seat 10 according to this embodiment includes a seat cushion 12 on which a vehicle occupant P sits, a seatback 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-to-rear direction, left-to-right direction (width direction), and up-to-down direction of the vehicle seat 10 coincide with the front-to-rear, left-to-right, up-to-down directions of the vehicle. The occupant P shown in FIGS. 8A to 8C is, for example, an AM50 (50th percentile of American adult males) HYBRID III dummy used in frontal collision tests. The occupant P is wearing a three-point seat belt 18 installed in the vehicle (not shown).

[0022] The skeleton of the vehicle seat 10 is formed by a vehicle seat frame 30 shown in Figures 1 to 4. This vehicle seat frame 30 has a seat cushion frame 32 that forms the skeleton of the seat cushion 12, and a seat back frame 40 that forms the skeleton of the seat back 14. Pad materials (not shown) covered with skins 13, 15 (see Figures 8A to 8C) are attached to the seat cushion frame 32 and the seat back frame 40, respectively.

[0023] The seat cushion frame 32 includes a pair of left and right side frames 34 that are disposed on the left and right sides of the seat cushion 12 and extend in the front-to-rear direction of the seat, a cushion pan 36 that spans between the upper ends of the front portions of the left and right side frames 34, and a rear frame 38 that spans between the rear ends of the left and right side frames 34. A seat cushion spring (not shown) spans between the cushion pan 36 and the rear frame 38. The seat cushion spring elastically supports the padding of the seat cushion 12 from below the seat.

[0024] The left and right side frames 34 are formed into an elongated shape, for example, by press-molding sheet metal, and are arranged with their longitudinal direction along the front-to-rear direction of the seat and their thickness direction along the left-to-right direction of the seat. The cushion pan 36 is formed, for example, from sheet metal into a generally rectangular shape, and is arranged with its thickness direction along the up-down direction of the seat, and both ends in the left-to-right direction of the seat are fixed to the front portions of the left and right side frames 34 by means of welding or the like. The rear frame 38 is formed, for example, from a metal pipe, and is arranged with its axial direction along the left-to-right direction of the seat, and both ends in the left-to-right direction of the seat are rotatably connected to the rear ends of the left and right side frames 34 by means of caulking or the like.

[0025] The lower end of a seatback frame 40 is recliningly connected to the rear ends of the left and right side frames 34 via a well-known reclining mechanism 46. The seatback frame 40 includes a pair of left and right side frames 42 that are disposed on the left and right sides of the seat back 14 and extend in the vertical direction of the seat, an upper frame (not shown) that spans between the upper ends of the left and right side frames 42, and a lower frame 44 that spans between the lower ends of the left and right side frames 42. A headrest 16 is connected to the upper frame.

[0026] 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 a lifter mechanism 56, allowing adjustment of the front-to-rear and up-to-down positions relative to the vehicle floor. 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 rails 50 include a lower rail 52 fixed to the vehicle floor by means of, for example, bolt fastening, an upper rail 54 supported so as to be slidable in the front-to-rear direction relative to the lower rail 52, and a locking mechanism (not shown) that restricts sliding of the upper rail 54 relative to the lower rail 52. The lower rail 52 and the upper rail 54 are disposed with their longitudinal directions extending in the front-to-rear direction.

[0027] The lifter mechanism 56 is configured to include a pair of left and right front risers 58 (see FIGS. 1 to 4), a pair of left and right rear risers 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 risers 58, the left and right rear risers 60, the left and right front links 62, and the left and right rear links 64 are manufactured by, for example, press-forming sheet metal. The left and right front risers 58 correspond to the "left and right risers" in this invention, and the left and right front links 62 correspond to the "left and right links" in this invention.

[0028] 3, the left and right front risers 58 have front fixing portions 58A fixed to upper surfaces of the front ends of the left and right upper rails 54 by means of bolts or the like, and front vertical wall portions 58B extending upward from inner left and right ends of the front fixing portions 58A. Although not shown, the left and right rear risers 60 have rear fixing portions fixed to upper surfaces of the rear ends of the left and right upper rails 54 by means of bolts or the like, and rear vertical wall portions extending upward from one left and right end of the rear fixing portion.

[0029] The left and right front links 62 and the left and right rear links 64 are disposed in a posture inclined rearward. One end (respective upper end) of each of the left and right front links 62 is overlapped from the inside in the left-right direction with the front portions of the left and right side frames 34, and is rotatably connected to the front portions of the left and right side frames 34 via connecting shafts 65 whose axis direction is in the left-right direction. The other end (respective lower end) of each of the left and right front links 62 is overlapped from the outside in the left-right direction with the front vertical wall portions 58B of the left and right front risers 58, and is rotatably connected to the front vertical wall portions 58B via connecting shafts 66 whose axis direction is in the left-right direction.

[0030] One end (respective upper end) of each of the left and right rear links 64 is disposed inside in the left-right direction with respect to the rear portions of the left and right side frames 34, and is fixed to the rear frame 38. As a result, 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 (respective lower end) of each of the left and right rear links 64 is overlapped with the rear vertical wall portions of the left and right rear risers 60 from one side in the left-right direction, and is rotatably connected to the rear vertical wall portion via a connecting shaft (not shown) whose axis is in the left-right direction.

[0031] A sector gear, for example, is formed on one of the left and right rear links 64, and a pinion (not shown) meshed with the sector gear is rotated manually or electrically to rotate the one rear link 64. This causes the left and right rear links 64 and the left and right front links 62 to rotate, changing the vertical position of the seat cushion frame 32 (i.e., the seat cushion 12).

[0032] 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 made of, for example, a metal pipe material, and is arranged with its axis in the left-right direction. Both axial ends of the connecting pipe 68 are inserted into through holes (not shown) formed in the middle parts of the left and right front links 62, and are fixed to the left and right front links 62 by means of welding or the like.

[0033] 1 and 4, the seat cushion frame 32 has a reinforcing member 72 fixed to the rear end of the cushion pan 36. This reinforcing member 72 is manufactured, for example, by press-molding a metal plate, 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 left and right sides of the rear end of the cushion pan 36, reinforcing the fixed portions. The connecting portion 72B connects the left and right reinforcing portions 72A in the left-right direction.

[0034] As shown in FIG. 5 , the left and right reinforcement portions 72A each include, for example, a fixed portion 72A1, a downward extending portion 72A2, a rearward extending portion 72A3, and a fixed piece 72A4. The fixed portion 72A1 is fixed to the upper surface of the rear end of the cushion pan 36 by welding or other means. The downward extending portion 72A2 extends downward from the center in the left-right direction of the rear end of the fixed 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 reinforcement portions 72A are connected in the left-right direction by a connecting portion 72B and are formed integrally with the connecting portion 72B. The fixed piece 72A4 extends downward from the center in the left-right direction of the front end of the fixed portion 72A1. The lower side of the fixed piece 72A4 is bent forward. The fixing piece 72A4 is inserted into a hole (not shown) formed in the cushion pan 36 and fixed to the cushion pan 36 by means of welding or the like.

[0035] 1 and 4, a through-hole 37 is formed as a weakened portion in the center of the rear end of the cushion pan 36 in the left-right direction. This through-hole 37 corresponds to the "hole" in the present invention. This through-hole 37 has, as an example, a rectangular shape with its longitudinal direction extending in the front-rear direction, and penetrates the rear end of the cushion pan 36. The rear end of the cushion pan 36 is locally weakened at the location where this through-hole 37 is formed.

[0036] The through-holes 37 are the starting points of deformation when the cushion pan 36 deforms during a frontal collision of the vehicle. The frontal collision is similar to, for example, the full-wrap frontal collision test (against a rigid barrier, speed 35 mph (approximately 56 km / h)) prescribed by the National Highway Traffic Safety Administration (NHTSA) of the U.S. Department of Transportation. In the early stage of the frontal collision (see FIG. 8B), a relatively low load is applied from the occupant P to the seat cushion 12, and in the later stage of the frontal collision (see FIG. 8C), a relatively high load is applied from the occupant P to the seat cushion 12. The strength of the cushion pan 36 is set so that in the later stage of the frontal collision, the cushion pan 36 deforms downward starting from the through-holes 37, as shown in FIG. 6.

[0037] The number of through holes 37 may be more than one. Furthermore, the weakened portion formed in the left-right center of the rear end of the cushion pan 36 is not limited to the through hole 37, and may be anything that locally weakens the left-right center of the rear end of the cushion pan 36. For example, the weakened portion may be a notch that penetrates the left-right center of the rear end of the cushion pan 36, or a bent portion that is locally bent in the left-right center of the rear end of the cushion pan 36.

[0038] In this embodiment, as shown in Fig. 4, a connecting pipe 68 of the lifter mechanism 56 is disposed below the rear of the cushion pan 36. As shown in Fig. 7, this connecting pipe 68 is disposed with a gap (gap) 76 between it and the rear of the cushion pan 36. The size of this gap 76 can be increased, for example, by reducing the diameter of the connecting pipe 68. No other members are interposed between this connecting pipe 68 and the rear of the cushion pan 36. Note that the reinforcing member 72 is not shown in Figs. 6 and 7.

[0039] As described above, the connecting pipe 68 rotates together with the front link 62 as the up-down position of the seat cushion 12 is changed (adjusted) by the lifter mechanism 56, but the gap 76 is configured to be secured regardless of the rotational position of the connecting pipe 68. This ensures a deformation stroke when the cushion pan 36 deforms downward starting from the through-hole 37.

[0040] In this embodiment, the amount of deformation of the cushion pan 36 during a frontal collision is adjusted by the reinforcing member 72 (deformation amount adjusting member). The left and right reinforcing portions 72A of the reinforcing member 72 are disposed in positions facing the left and right ischium (not shown) of the occupant P from the front side. Therefore, during a frontal collision, a load from the left and right ischium of the occupant P is input to the portions of the cushion pan 36 to which the left and right reinforcing portions 72A are fixed. In the early stage of the frontal collision (see FIG. 8B ), the left and right reinforcing portions 72A suppress deformation (downward sinking) of the cushion pan 36. In the later stage of the frontal collision, the load applied to the cushion pan 36 from the left and right ischium of the occupant P increases, causing the cushion pan 36 to deform from the through-hole 37. Note that the cushion pan 36 may be configured without the reinforcing member 72.

[0041] (Action and effect) Next, the operation and effects of this embodiment will be described.

[0042] In the vehicle seat 10 configured as described above, the seat cushion frame 32 that forms the framework of the seat cushion 12 includes left and right side frames 34 disposed on the left and right sides of the seat cushion 12, and a cushion pan 36 that connects the upper ends of the front portions of the left and right side frames 34 in the left-right direction. The cushion pan 36 is locally weakened at a through-hole 37 that serves as a weakened portion provided in the center of the rear end in the left-right direction.

[0043] In the early stages of a frontal collision (see FIG. 8B), the load applied from the buttocks of the occupant P to the cushion pan 36 is low, so the reaction force applied from the cushion pan 36 to the occupant's buttocks can prevent the submarine phenomenon from occurring. In the later stages of a frontal collision (see FIG. 8C), the load applied from the buttocks of the occupant P to the cushion pan 36 increases, causing the cushion pan 36 to deform (bend downward) starting from the through-hole 37. This ensures impact absorption. Moreover, unlike the automobile seat described in the Background Art section, this seat is not configured to receive the occupant's lower back (buttocks) that has climbed over a receiving portion of the seat cushion frame with a folding portion, so it is possible to prevent the occupant P's lower back from moving forward.

[0044] Furthermore, in this embodiment, the through hole 37 is the weakened portion, so that the cushion pan 36 having the weakened portion formed therein can be easily manufactured, for example, by forming the through hole 37 in the center in the left-right direction of the rear end of an existing cushion pan. Moreover, because the through hole 37 (weak portion) has an elongated shape with its longitudinal direction in the front-rear direction, it functions well as the starting point of the bending portion when the rear end of the cushion pan 36 bends in a substantially V-shape when viewed in the front-rear direction.

[0045] In this embodiment, the connecting pipe 68 of the lifter mechanism 56 is disposed below the rear portion of the cushion pan 36, but this connecting pipe 68 is disposed across a gap 76 from the rear portion of the cushion pan 36. Therefore, even in a configuration in which the connecting pipe 68 is disposed below the rear portion of the cushion pan 36, space can be secured for the cushion pan 36 to deform starting from the through-hole 37 (weak portion). Moreover, the amount of impact absorption can be adjusted by adjusting the size of the gap 76, which serves as this deformation space. Furthermore, when the deformed cushion pan 36 hits the connecting pipe 68 as described above, further deformation of the cushion pan 36 is suppressed, thereby limiting forward movement of the hips of the occupant P. Furthermore, because the impact is absorbed in the space above the connecting pipe 68, this configuration can be applied to vehicles in which it is difficult to secure an impact-absorbing space below the connecting pipe 68.

[0046] In this embodiment, the seat cushion frame 32 includes a reinforcing member 72 fixed to the rear end of the cushion pan 36. The reinforcing member 72 includes left and right reinforcing portions 72A fixed to both sides of the rear end of the cushion pan 36 in the seat left-right direction, reinforcing the cushion pan 36 at its portions. Therefore, in the early stage of a frontal collision (see FIG. 8B), 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. This increases the reaction force applied to the occupant P from the cushion pan 36 in the early stage of a frontal collision, improving the effect of suppressing the forward movement of the occupant P and the occurrence of the submarine phenomenon. Meanwhile, in the later stage of a frontal collision (see FIG. 8C), 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 center in the left-right direction, which is not reinforced by the left and right reinforcing portions 72A. This ensures improved impact absorption.

[0047] Furthermore, in this embodiment, the left and right reinforcing portions 72A of the reinforcing member 72 are connected in the left-right direction by the connecting portion 72B, so the reinforcing member 72 can be made into a single component. As a result, it is easier to reduce manufacturing costs compared to when the reinforcing member 72 is made of two components. Moreover, in the early stages of a frontal collision, the reaction force from the connecting portion 72B is also applied to the buttocks of the occupant P, which further improves the effect of suppressing the submarine phenomenon.

[0048] In the above embodiment, the reinforcing member 72 fixed to the rear end of the cushion pan 36 is configured to have a connecting portion 72B that connects the left and right reinforcing portions 72A, but this is not limited to this, and the reinforcing member 72 may be configured not to have a connecting portion 72B.

[0049] Furthermore, in the above embodiment, the connecting pipe 68 as the connecting member is made of a metal pipe, but the material of the connecting member is not limited to this and can be changed as appropriate.

[0050] In addition, the present invention can be implemented with various modifications within the scope of the gist thereof. Furthermore, it goes without saying that the scope of the rights of the present invention is not limited to the above-described embodiment. [Explanation of symbols]

[0051] 10 Vehicle seats 12 seat cushions 14 Seat back 30 Vehicle seat frame 32 Seat cushion frame 34 Side frame 36 Cushion Bread 37 Through hole (weak part) 50 slide rail 58 Front Riser (Riser) 62 Front Link (Link) 68 Connecting pipe (connecting member)

Claims

1. A seat cushion frame that forms a framework of a seat cushion on which a vehicle occupant sits, left and right side frames disposed on left and right sides of the seat cushion; a cushion pan that connects upper ends of front portions of the left and right side frames in the seat left-right direction and is locally weakened at a weakened portion provided in the center of the rear end in the seat left-right direction; Equipped with The seat cushion frame is configured so that the cushion pan is bent in a substantially V-shape as viewed in the front-to-rear direction of the vehicle starting from the weak portion due to a load from the buttocks of the occupant during a frontal collision of the vehicle.

2. The seat cushion frame according to claim 1 , wherein the weakened portion is a hole or a notch that penetrates the rear end portion of the cushion pan.

3. the left and right side frames are connected to a floor portion of the vehicle via left and right links having one end portions connected to front portions of the left and right side frames, left and right risers having the other end portions connected to the left and right links, and left and right slide rails to which the left and right risers are attached; 3. The seat cushion frame according to claim 1, wherein a connecting member that connects the left and right links in the left-right direction of the seat is disposed below the rear portion of the cushion pan with a gap therebetween.

4. The seat cushion frame according to claim 1 or 2; left and right slide rails that are disposed below the left and right side frames of the seat cushion frame and are attached to a floor portion of the vehicle; left and right risers attached to the left and right slide rails; left and right links, one end of each of which is connected to a front portion of the left and right side frames and the other end of each of which is connected to the left and right risers; A vehicle seat frame comprising:

5. A vehicle seat comprising a seat cushion on which an occupant sits and a seat back that supports the back of the occupant and serves as a backrest, wherein the skeleton of the seat cushion is formed by the seat cushion frame described in any one of claims 1 to 3.

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