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 with a simple structure.SOLUTION: A seat cushion frame 32 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; 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 a reinforcement member 72 having left and right reinforcement parts 72A which are fixed to both sides as seen in the seat lateral direction at a rear end part of the cushion pan 36 and reinforce portions where the reinforcement parts 72A are fixed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] The vehicle seat described in Patent Document 1 below includes a pair of left and right side frames spaced apart in the seat width direction, a first pan frame connected to the left and right side frames, a second pan frame formed by dividing the first pan frame, and a pair of left and right connecting brackets connecting the first pan frame and the second pan frame. The left and right connecting brackets have a first attachment portion for the first pan frame and a second attachment portion for the second pan frame, with the first attachment portion and the second attachment portion being located at different positions in the seat width direction. In this vehicle seat, when a seat occupant sinks diagonally downward and forward due to the submarine phenomenon during a frontal collision, the left and right connecting brackets deform to absorb the impact on the seat occupant. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-127187 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above prior art, the pan frame (cushion pan) is made up of a first pan frame, a second pan frame, and left and right connecting brackets, making the cushion pan structure complex.

[0005] 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 ensure impact absorption with a simple configuration while suppressing the occurrence of submarine phenomenon during a frontal collision. [Means for solving the problem]

[0006] 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, 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 a reinforcing member that is fixed to both sides of the rear end of the cushion pan in the left-right direction of the seat and has left and right reinforcing parts that reinforce the fixed parts.

[0007] According to a first aspect, a seat cushion frame constituting the framework of a seat cushion on which a vehicle occupant sits includes left and right side frames, a cushion pan, and a reinforcing member. The left and right side frames are disposed on left and right lateral sides of the seat cushion. The cushion pan connects upper ends of the front portions of the left and right side frames in the left-right direction of the seat. The reinforcing member has left and right reinforcing members fixed to both sides of the rear end of the cushion pan in the left-right direction of the seat. Since the portions of the cushion pan where the left and right reinforcing members are fixed are reinforced, deformation of the cushion pan due to the load applied from the occupant's buttocks to the cushion pan is suppressed in the early stage of a frontal collision. As a result, the reaction force applied from the cushion pan to the occupant's buttocks increases in the early stage of a frontal collision, thereby suppressing the occurrence of the submarine phenomenon. In the later stage of a frontal collision, as the load applied from the occupant's buttocks to the cushion pan increases, the cushion pan deforms from the center side in the left-right direction of the seat, which is not reinforced by the left and right reinforcing members. This ensures impact absorption. Moreover, since an existing cushion pan can be used as the cushion pan, the structure can be simplified.

[0008] In a second aspect of the present invention, in the seat cushion frame of the first aspect, the left and right reinforcing portions are arranged at positions facing the left and right ischial bones of the occupant from the front side of the seat.

[0009] According to the second aspect, the left and right reinforcing parts fixed to both sides of the rear end of the cushion pan in the left-right direction of the seat are positioned in positions facing the left and right ischial bones of the occupant seated on the seat cushion from the front side of the seat. Therefore, in the early stage of a frontal collision, the left and right ischial bones of the occupant receive a reaction force from the portions of the cushion pan to which the left and right reinforcing parts are fixed. This makes it possible to effectively suppress forward movement of the occupant due to the impact of a frontal collision.

[0010] A seat cushion frame according to a third aspect of the present invention is the seat cushion frame according to the first or second aspect, wherein the reinforcing member has a connecting portion that connects the left and right reinforcing portions in the left-right direction of the seat.

[0011] According to the third aspect, the left and right reinforcing portions of the reinforcing member are connected in the left-right direction of the seat by the connecting portion, so the reinforcing member can be made into a single part. As a result, it is easier to reduce manufacturing costs compared to when the reinforcing member is made of two parts. Moreover, in the early stages of a frontal collision, the reaction force from the connecting portion is also applied to the occupant, which further improves the effect of suppressing the occurrence of the submarine phenomenon.

[0012] A seat cushion frame of a fourth aspect of the present invention is any one of the first to third aspects, 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 a front portion 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 left and right reinforcing patches are fixed to the inner surfaces of the front portions of the left and right side frames in the left and right direction of the seat, forward of the one end of the left and right links, and the front portions of the left and right side frames are reinforced by the left and right reinforcing patches.

[0013] According to a fourth aspect, the left and right side frames are connected to the vehicle floor via left and right links, one end of each of which is connected to the front of the left and right side frames, left and right risers, and left and right slide rails to which the left and right risers are attached. Left and right reinforcing patches are fixed to the left and right sides of the front portions of the left and right side frames, forward of the seat from the one end of the left and right links, and these reinforcing patches reinforce the front portions of the left and right side frames. This prevents the left and right side frames from deforming inward in the left and right direction of the seat when a load from the occupant is applied to the front portions of the left and right side frames via the cushion pan during the initial stage of a frontal collision. As a result, the reaction force applied to the occupant during the initial stage of a frontal collision is increased, further improving the effectiveness of suppressing the submarine phenomenon.

[0014] A fifth aspect of the present invention provides a vehicle seat frame comprising a seat cushion frame according to any one of the first to fourth aspects, left and right links each having one end connected to a front portion of the left and right side frames of the seat cushion frame, 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 and to which the other ends of the left and right links are connected.

[0015] According to a fifth 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 to which the other end of each of the left and right links is connected are attached to the left and right slide rails. The above seat cushion frame is the seat cushion frame of any one of the first to fourth aspects. Therefore, the same effect as that of any one of the first to fourth aspects can be obtained.

[0016] A vehicle seat according to a sixth 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 fourth aspects.

[0017] According to the sixth 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 fourth aspects, thereby achieving the same effect as any one of the first to fourth 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 suppress the occurrence of the submarine phenomenon during a frontal collision while ensuring impact absorption with a simple configuration. [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] FIG. [Figure 5A] FIG. 2 is a plan view showing a cushion pan and a reinforcing member. [Figure 5B] 10 is a plan view showing a state in which the cushion pan and the reinforcing member are deformed by a load from an occupant during a frontal collision. FIG. [Figure 6] FIG. 2 is a perspective view showing a front portion of the side frame. [Figure 7] 10 is a cross-sectional view showing the periphery of the reinforcing patch as viewed from the rear side of the seat. FIG. [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 3. The 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 3), 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, 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. 4 , 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] The reinforcing member 72 configured as described above is a deformation amount adjusting member for adjusting the amount of deformation of the cushion pan 36 during a frontal collision. The left and right reinforcing portions 72A are disposed in positions facing, from the front side, the left and right ischium (not shown) of the occupant P. 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.

[0036] The above-mentioned frontal collision is similar to the full-wrap frontal collision test (against a rigid barrier, speed 35 mph (approximately 56 km / h) specified by the National Highway Traffic Safety Administration (NHTSA) of the United States Department of Transportation. In the early stage of this 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 this frontal collision (see FIG. 8C), a relatively high load is applied from the occupant P to the seat cushion 12.

[0037] In this embodiment, as shown in Fig. 5A, in the early stage of a frontal collision, 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 ischial bones of the occupant P increases, causing the cushion pan 36 to deform as shown in Fig. 5B.

[0038] 6, the seat cushion frame 32 has left and right reinforcing patches 74 fixed to the left and right side surfaces (here, inner surfaces) of the front portions of the left and right side frames 34. The left and right reinforcing patches 74 are disposed forward of one end (upper end) of the left and right front links 62 connected to the front portions of the left and right side frames 34.

[0039] Each reinforcement patch 74 is manufactured by, for example, press-molding sheet metal. As an example, each reinforcement patch 74 has a patch body 74A superimposed on the inner lateral surface of the front portion of each side frame 34 and an upper flange 74B extending inward in the lateral direction from the upper end of the patch body 74A. An upper flange 34A extending inward in the lateral direction is formed at the upper end of each side frame 34, and the upper flange 74B of each reinforcement patch 74 is superimposed on the lower surface of the upper flange 34A. These reinforcement patches 74 are fixed to the front portions of each side frame 34 by means of welding or the like, and the front portions of each side frame 34 are reinforced at the locations where the reinforcement patches 74 are fixed. Alternatively, each reinforcement patch 74 may be fixed to the outer lateral surface of the front portion of each side frame 34. The shape of each reinforcement patch 74 can be modified as appropriate.

[0040] The left and right reinforcing patches 74 configured as described above are reinforcing materials that suppress the front portions of the left and right side frames 34 from deforming (collapse) inward in the left-right direction due to a load F (see FIG. 7) from the occupant applied to the cushion pan 36 during a frontal collision. This suppression of deformation is configured to increase the reaction force applied to the buttocks of the occupant P from the front portion of the seat cushion 12 in the early stage of a frontal collision.

[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, a cushion pan 36, and a reinforcing member 72. The left and right side frames 34 are disposed on the left and right sides of the seat cushion 12. The cushion pan 36 connects the upper ends of the front portions of the left and right side frames 34 in the left-right direction. The reinforcing member 72 has left and right reinforcing portions 72A fixed to both the left and right sides of the rear end of the cushion pan 36.

[0043] Because the portions of the cushion pan 36 to which the left and right reinforcing portions 72A are fixed are reinforced, 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 in the early stages of a frontal collision (see FIG. 8B). This increases the reaction force applied to the buttocks of the occupant from the cushion pan 36 in the early stages of a frontal collision. As a result, the inertial movement of the occupant P toward the front of the vehicle is suppressed, and the lap belt 18A of the seat belt 18 maintains the restraint of the waist of the occupant P, thereby suppressing the occurrence of the submarine phenomenon.

[0044] On the other hand, in the later stages of a frontal collision (see FIG. 8C), the cushion pan 36 deforms from the center side in the left-right direction of the seat, which is not reinforced by the left and right reinforcing portions 72A. This ensures impact absorption. As a result, the injury level of the occupant P can be reduced. Moreover, an existing cushion pan can be used as the cushion pan 36, so the configuration can be simplified.

[0045] In this embodiment, the left and right reinforcing portions 72A are disposed in positions facing, from the front side, the left and right ischium of the occupant P seated on the seat cushion 12. Therefore, in the early stages of a frontal collision, the left and right ischium of the occupant P receive a reaction force from the portions of the cushion pan 36 to which the left and right reinforcing portions 72A are fixed. This makes it possible to effectively suppress forward movement of the occupant P due to the impact of the frontal collision.

[0046] Furthermore, in this embodiment, the left and right reinforcing portions 72A of the reinforcing member 72 are connected in the left-right direction of the seat 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.

[0047] Furthermore, in this embodiment, left and right reinforcing patches 74 are fixed to the front portions of the left and right side frames 34 of the seat cushion frame 32 on the side surfaces in the left-right direction of the seat, further forward of one end of the left and right front links 62, thereby reinforcing the areas where the reinforcing patches 74 are fixed. As a result, 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 in the early stages of a frontal collision, the left and right side frames 34 are prevented from deforming in such a way that they collapse inward in the left-right direction of the seat. As a result, the reaction force applied to the occupant P in the early stages of a frontal collision increases, further improving the effect of suppressing the occurrence of 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] In addition, in the above embodiment, the seat cushion frame 32 is configured to include a reinforcing member 72 and left and right reinforcing patches 74, but this is not limited to this, and the seat cushion frame 32 may be configured to not include both or one of the reinforcing member 72 and the reinforcing patch 74.

[0050] 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.

[0051] 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]

[0052] 10 Vehicle seats 12 seat cushions 14 Seat back 30 Vehicle seat frame 32 Seat cushion frame 34 Side frame 36 Cushion Bread 50 slide rail 58 Front Riser (Riser) 62 Front Link (Link) 68 Connecting pipe (connecting member) 72 Reinforcement member 72A Reinforcement part 72B Connection part 74 Reinforcement Patch

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 connecting upper ends of front portions of the left and right side frames in the left-right direction of the seat; a reinforcing member that is fixed to both sides of a rear end portion of the cushion pan in the seat left-right direction, and that has left and right reinforcing portions that reinforce the fixed portions, but does not reinforce a center side of the rear end portion of the cushion pan in the seat left-right direction; A seat cushion frame comprising:

2. The seat cushion frame according to claim 1 , wherein the left and right reinforcing portions are disposed at positions facing the left and right ischial bones of the occupant from the front side of the seat.

3. 3. The seat cushion frame according to claim 1, wherein the reinforcing member has a connecting portion that connects the left and right reinforcing portions in the left-right direction of the seat.

4. 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; A seat cushion frame as described in any one of claims 1 to 3, wherein left and right reinforcing patches are fixed to the left and right sides of the front parts of the left and right side frames, forward of the seat from one end of the left and right links, and the front parts of the left and right side frames are reinforced by the left and right reinforcing patches.

5. The seat cushion frame according to any one of claims 1 to 3, left and right links, one end of each of which is connected to a front portion of the left and right side frames of the seat cushion frame; left and right slide rails disposed below the left and right side frames and attached to a floor portion of the vehicle; left and right risers attached to the left and right slide rails and connected to the other ends of the left and right links; A vehicle seat frame comprising:

6. 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 4.

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