Vehicle seats

Abstract

To provide a vehicular seat configured so that a seat back side frame can be suppressed from fracturing, at the time of collision of a vehicle.SOLUTION: A rear link 58A is constituted to include a rear link main body part 62 and a hook-shaped piece 64, where the rear link main body part 62 is arranged between a side frame 42 and a vertical wall part 30C when viewed from a back surface. Further, the hook-shaped piece 64 is hung down from the rear link main body part 62 and is formed in a hook-shape so as to stride across the vertical wall part 30C along a seat width direction. Therefore, when a collision load is transmitted to an anchor bracket 30 through the rear link 58A at the time of rear collision of a vehicle, the hook-shaped piece 64 formed in the rear link 58A contacts the anchor bracket 30. Because the hook-shaped piece 64 is hung down in a hook-shape from the rear link main body part 62, the hook-shaped piece 64 contacts the anchor bracket 30, so that collision energy is absorbed in a course of deformation of the hook-shaped piece 64, which can suppress a seat back side frame 54 from fracturing.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] Patent Document 1 below discloses a technique relating to a vehicle seat equipped with a lifter link mechanism that raises and lowers a seat cushion.

[0003] In this prior art, when a large load (collision load) directed toward the rear of the seat in the fore-and-aft direction is input to the seat back due to a rear-end collision of the vehicle (hereinafter referred to as a "rear collision") or the like, the large load is transmitted to a bracket to which the other longitudinal end of the lifter link is connected via a lifter link, one longitudinal end of which is connected to a lower end of a seat back side frame that constitutes a side portion of the skeleton of the seat back. The bracket is fixed to a slide rail that is provided on the vehicle floor along the fore-and-aft direction of the vehicle, and the vehicle seat is connected to the slide rail via the bracket. Therefore, the large load transmitted to the bracket is transmitted to the vehicle floor via the slide rail. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2020-93728 Summary of the Invention [Problem to be solved by the invention]

[0005] Here, for example, if the seatback side frame collides with the vehicle floor via a slide rail or the like and a load (reaction force) greater than a predetermined load is input from the vehicle floor, the seatback side frame may bend in the fore-and-aft direction of the seat and break (so-called snap).

[0006] SUMMARY OF THE INVENTION In consideration of the above, an object of the present invention is to provide a vehicle seat that can prevent breakage of a seatback side frame in the event of a vehicle collision. [Means for solving the problem]

[0007] In order to solve the above problems, a vehicle seat according to the invention of claim 1 comprises a seat cushion frame that is a skeleton of a seat cushion on which an occupant sits, and a pair of side frames that are arranged on the outer sides in the seat width direction and extend in the seat front-rear direction; brackets that are provided on the vehicle body floor and are fixed to slide rails that allow the seat cushion to slide in the seat front-rear direction; and brackets that are provided on the front and rear of the seat cushion in the vehicle front-rear direction and are arranged with one end in the longitudinal direction along the seat front-rear direction, and are connected to the side frames at one end in the longitudinal direction and at the other end in the longitudinal direction. and a lifter link having an end connected to the bracket and enabling the seat cushion frame to be raised and lowered, the bracket including a fixed portion fixed to the slide rail and arranged along the vehicle width direction and the vehicle front-rear direction, and a vertical wall portion erected from the end of the fixed portion in the seat width direction, and a rear link of the lifter link provided at the rear of the seat cushion in the vehicle front-rear direction includes a rear link main body portion arranged between the side frame and the vertical wall portion in a rear view, and a hook-shaped portion hanging down from the rear link main body portion and straddling the vertical wall portion along the seat width direction. When the vehicle hits the bracket, it deforms and absorbs the collision energy. and a hook-shaped piece.

[0008] The vehicle seat according to the invention of claim 1 includes a pair of side frames, a lifter link, and a bracket. The pair of side frames are arranged on outer sides in the seat width direction of a seat cushion frame that forms the framework of the seat cushion on which an occupant sits, and are formed to extend in the front-rear direction of the seat.

[0009] The bracket is fixed to a slide rail that is provided on the floor of the vehicle body and allows the seat cushion to slide in the front-to-rear direction of the seat.

[0010] The lifter links are provided at the front and rear of the seat cushion in the vehicle longitudinal direction, and are arranged with their longitudinal direction aligned with the seat longitudinal direction, with one longitudinal end of the lifter link connected to the side frame and the other longitudinal end of the lifter link connected to the bracket, allowing the seat cushion frame to be raised and lowered.

[0011] The bracket includes a fixed portion and a vertical wall portion. The fixed portion is fixed to the slide rail and is disposed along the vehicle width direction and the vehicle front-rear direction. The vertical wall portion extends from an end of the fixed portion in the seat width direction.

[0012] On the other hand, the rear link of the lifter link, which is provided at the rear of the seat cushion in the vehicle longitudinal direction, includes a rear link main body and a hook-shaped piece. The rear link main body is disposed between the side frame and the vertical wall in rear view. The hook-shaped piece hangs down from the rear link main body and is formed in a hook shape so as to straddle the vertical wall in the seat width direction.

[0013] For example, in the event of a rear-end collision, if a collision load acting rearward in the vehicle longitudinal direction is applied to the seatback, which supports the upper body of a seated occupant seated on the seat cushion, the collision load is transmitted from the lower end of the seatback side frame, which constitutes the side portion of the skeleton of the seatback, to the rear link via the seat cushion frame, and then to the bracket via the rear link.

[0014] In the present invention, in the rear link, a hook-shaped piece formed in a hook shape hangs down from the rear link main body portion arranged between the side frame and the vertical wall portion in a rear view, straddling the vertical wall portion along the seat width direction, so that a portion of the hook-shaped piece overlaps with the vertical wall portion in a plan view.

[0015] Therefore, in the event of a rear-end collision of the vehicle, when a collision load is transmitted to the bracket via the rear link, the hook-shaped piece formed on the rear link in the present invention abuts against the bracket. Because the hook-shaped piece hangs down from the rear link main body in a hook shape, when the hook-shaped piece abuts against the bracket and deforms, the deformation of the hook-shaped piece absorbs the collision energy.

[0016] As a result, in the present invention, it is possible to prevent the seatback side frame from breaking (so-called sagging) in the event of a vehicle collision, compared to when a hook-shaped piece is not formed on the rear link main body.

[0017] The vehicle seat according to the invention of claim 2 is the vehicle seat according to the invention of claim 1, wherein the vertical wall portion is erected from the inner end of the fixed portion in the seat width direction, and the hook-shaped piece includes a hanging portion hanging down from the rear link main body portion, a horizontal wall portion bent from the lower end of the hanging portion toward the inside in the seat width direction and positioned above the vertical wall portion in the seat up-down direction, and a hook portion hanging down from the tip of the horizontal wall portion toward the lower side in the seat up-down direction and facing the vertical wall portion.

[0018] In the vehicle seat according to the invention of claim 2, a vertical wall portion formed on the bracket stands upright from the inner end of the fixing portion in the seat width direction. Meanwhile, the hook-shaped piece is configured to include a hanging portion, a horizontal wall portion, and a hook portion. The hanging portion hangs down from the rear link main body, and the horizontal wall portion is bent from the lower end of the hanging portion toward the inside in the seat width direction and is disposed above the vertical wall portion that constitutes part of the bracket in the seat up-down direction. Furthermore, the hook portion hangs down from the tip of the horizontal wall portion toward the downward side in the seat up-down direction and faces the vertical wall portion that constitutes part of the bracket.

[0019] As a result, in the event of a rear-end collision, when a collision load is transmitted to the bracket via the rear link, the side wall portion constituting a part of the hook-shaped piece formed on the rear link abuts against the bracket, causing the hook-shaped piece to deform via the side wall portion, and the deformation of the hook-shaped piece absorbs the collision energy.

[0020] The vehicle seat according to the invention described in claim 3 is a vehicle seat according to the invention described in claim 1 or claim 2, in which the rear link is formed with an extension piece that extends downward in the seat vertical direction from the rear link main body and is positioned opposite the hook portion with the vertical wall portion between them.

[0021] In the vehicle seat according to the invention of claim 3, the rear link has an extension piece extending downward in the seat up-down direction from the rear link main body, and the extension piece is disposed opposite the hook portion with the vertical wall portion constituting a part of the bracket therebetween.

[0022] In this way, by providing an extension piece in the rear link main body that faces the hook portion with the vertical wall portion that forms part of the bracket between them, even if a shift occurs along the seat width direction between the rear link main body and the bracket when the rear link main body abuts against the vertical wall portion of the bracket, the hook portion or extension piece can be abutted and deformed, making it possible to absorb the collision energy.

[0023] The extension piece and the hook portion do not necessarily have to be positioned opposite each other at approximately the same position in the vehicle front-rear direction with the vertical wall portion therebetween.

[0024] A vehicle seat according to a fourth aspect of the present invention is the vehicle seat according to the third aspect of the present invention, wherein the vertical wall portion has: It is formed in a roughly box shape, The rear side of the bracket in the seat front-rear direction Cover from the outside Covering member for blocking The engagement portion formed on the side wall of and a hole into which the cover member can be engaged is formed, and in a state where the cover member is engaged with the hole, Top edge of side wallcan be clamped between the hook-shaped piece and the extension piece.

[0025] In the vehicle seat according to the invention described in claim 4, It is formed in a roughly box shape, The rear side of the bracket in the seat front-to-rear direction Cover from the outside A cover member is provided to close the vertical wall portion that constitutes a part of the bracket. The engagement portion formed on the side wall of The cover member is formed with a hole into which the cover member can be engaged. Top edge of side wall can be clamped between the hook-shaped piece and the extension piece.

[0026] In this way, the cover member engaged with the hole formed in the vertical wall of the bracket Top edge of side wall By clamping the cover member between the hook-shaped piece and the extension piece formed on the lifter link body, rattle of the cover member is suppressed. [Effects of the Invention]

[0027] As described above, according to the vehicle seat of claim 1, it is possible to prevent the seatback side frame from breaking in the event of a vehicle collision.

[0028] According to the vehicle seat of claim 2, breakage of the seatback side frame can be suppressed in the event of a vehicle collision, compared to when the rear link main body does not have a hook-shaped piece formed thereon.

[0029] According to the vehicle seat of claim 3, even if a misalignment occurs between the rear link main body and the bracket in the seat width direction, the hook portion or the extension piece comes into contact with the bracket, and collision energy can be absorbed.

[0030] In the vehicle seat according to claim 4, a cover member that closes the rear side of the bracket is provided. Top edge of side wall By clamping the cover member between the hook-shaped piece and the extension piece, rattle of the cover member can be suppressed. [Brief explanation of the drawings]

[0031] [Figure 1] 1 is a perspective view showing a vehicle seat according to an embodiment of the present invention; [Figure 2] 2 is an enlarged cross-sectional view illustrating a main part of the vehicle seat according to the present embodiment. FIG. [Figure 3] 1 is an enlarged perspective view of a main portion of a vehicle seat according to an embodiment of the present invention; [Figure 4] 1 is an enlarged perspective view of a main portion of a vehicle seat according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0032] A vehicle seat 10 to which a vehicle seat frame structure according to an embodiment of the present invention is applied will be described below with reference to the drawings. Note that the arrows FR, UP, RH, IN, and OUT shown appropriately in each drawing indicate the front (direction of travel), top, right, inside, and outside of the vehicle width direction, respectively. Hereinafter, when the terms front-rear, left-right, and up-down are used in the description, they will refer to front-rear in the front-rear direction of the vehicle, left-right in the left-right direction of the vehicle (vehicle width direction), and up-down in the up-down direction of the vehicle, unless otherwise specified.

[0033] (Configuration of vehicle seat frame structure) First, the configuration of a vehicle seat 10 to which the vehicle seat frame structure according to this embodiment is applied will be described.

[0034] As shown in FIG. 1, a vehicle seat 10 to which the vehicle seat frame structure according to this embodiment is applied includes a seat cushion 12 on which an occupant sits, and a seat back 14 whose lower end is connected to the rear end of the seat cushion 12 and supports the upper body of the occupant, and a headrest (not shown) is attached to the upper end of the seat back 14.

[0035] Meanwhile, a pair of left and right slide rails 16 are provided on the vehicle body floor (not shown), and the vehicle seat 10 is slidable along the slide rails 16. The vehicle seat 10 is provided with a lifter mechanism 18, which allows the vehicle seat 10 to move up and down (raise and lower) relative to the left and right slide rails 16. The vehicle seat 10 is provided with a buckle device 22 to which a seat belt 20 is connected.

[0036] Here, the vehicle seat 10 in this embodiment is arranged so that the occupant sits facing the front of the vehicle, and the front-to-back, left-to-right (seat width direction) and up-to-down directions of the vehicle seat 10 are consistent with the front-to-back, left-to-right, up-to-down directions of the vehicle.

[0037] In this embodiment, the vehicle seat 10 is a driver's seat in a right-hand drive vehicle, but it may also be applied to a driver's seat, passenger seat, or rear seat in a left-hand drive vehicle. Note that when the configuration of this embodiment is applied to a driver's seat in a left-hand drive vehicle, the left and right configuration is reversed from that of this embodiment.

[0038] Each of the pair of left and right slide rails 16 has a lower rail 24 and an upper rail 26. The lower rail 24 is disposed such that its longitudinal direction is aligned with the front-to-rear direction, and the front and rear ends of the lower rail 24 are fixed to the vehicle body floor (not shown) via mounting brackets (not shown).

[0039] The upper rail 26 is disposed with its longitudinal direction aligned with the front-to-rear direction and is supported so as to be slidable along the longitudinal direction relative to the lower rail 24. However, a slide lock mechanism (not shown) normally restricts the upper rail 26 from sliding relative to the lower rail 24, and the slide restriction imposed by the slide lock mechanism is released by operating the lock release lever 28.

[0040] An anchor bracket 30 is fixed to the upper surface of the rear portion of the upper rail 26, which is disposed on the left side (here, the inner side in the vehicle width direction) of the vehicle seat 10. As shown in Fig. 2, this anchor bracket 30 is formed to match the width dimension of the slide rail 16, and has a substantially U-shaped cross section when cut along the width direction of the slide rail 16 (vehicle width direction).

[0041] The anchor bracket 30 is configured to include a fixed portion 30A fastened to the upper rail 26, and a pair of left and right vertical wall portions 30B, 30C that rise from both ends of the fixed portion 30A in the seat width direction and face each other. The vertical wall portion 30B is disposed on the inner side in the vehicle width direction, and is formed so as to be higher than the vertical wall portion 30C that is disposed on the outer side in the vehicle width direction.

[0042] In addition, the lower end of a seat belt stay 34 that constitutes part of the buckle device 22 shown in Figure 1 is fastened to the upper end of the vertical wall portion 30B via an anchor bolt 32 and a nut (not shown), and the seat belt stay 34 is capable of rotating within a predetermined angle around the axis of the anchor bolt 32.

[0043] A buckle 36 is fixed to the upper end of the seat belt stay 34. A tongue plate 38 attached to the seat belt 20 of the three-point seat belt device is connected to this buckle 36, and when an occupant seated on the seat cushion 12 connects the tongue plate 38 to the buckle 36, the occupant is restrained by the seat belt 20.

[0044] On the other hand, the seat cushion 12 of the vehicle seat 10 includes a seat cushion frame 40 disposed above the left and right slide rails 16. The seat cushion frame 40 has a generally rectangular frame shape and includes left and right side frames 42, 44, a front frame 46 that constitutes the front portion of the seat cushion frame 40, and a rear frame 48 that constitutes the rear portion of the seat cushion frame 40.

[0045] The left and right side frames 42, 44 are formed elongated from, for example, sheet metal material and are respectively arranged along the front-to-rear direction. The side frame 42 is arranged on the inner side in the vehicle width direction, and the side frame 44 is arranged on the outer side in the vehicle width direction.

[0046] The front frame 46 is formed into an elongated shape using, for example, sheet metal, and is arranged with its axis (longitudinal direction) aligned along the left-right direction, spanning between the front ends of the left and right side frames 42, 44. In other words, both longitudinal ends of the front frame 46 are joined to the left and right side frames 42, 44, and the front frame 46 connects the front ends of the left and right side frames 42, 44 in the seat width direction.

[0047] A connecting pipe 50 is provided below the front frame 46. This connecting pipe 50 constitutes part of the seat cushion frame 40 and also constitutes part of a lifter mechanism 18, which will be described later. The connecting pipe 50 is formed, for example, from a metal pipe material, and is bridged between the front ends of the left and right side frames 42, 44 with its axial direction (longitudinal direction) aligned with the left-right direction.

[0048] Both longitudinal ends of the connecting pipe 50 are inserted into circular through-holes (not shown) formed in the front ends of the left and right side frames 42, 44 and are secured by means such as crimping. As a result, the front ends of the left and right side frames 42, 44 are connected in the left-right direction by the connecting pipe 50, and the connecting pipe 50 is rotatable about an axis along the left-right direction relative to the left and right side frames 42, 44.

[0049] The rear frame 48 is formed, for example, from a metal pipe material, is arranged with its axis (longitudinal direction) aligned along the left-right direction, and spans between the rear ends of the left and right side frames 42, 44. Although not shown, both longitudinal ends of the rear frame 48 are inserted into circular through-holes formed in the rear ends of the left and right side frames 42, 44, and are retained by means of caulking or the like.

[0050] As a result, the rear ends of the left and right side frames 42, 44 are connected to each other by the rear frame 48, and the rear frame 48 is rotatable relative to the left and right side frames 42, 44 about an axis extending in the left-right direction.

[0051] The rear ends of the left and right side frames 42, 44 are connected via a well-known reclining mechanism to the lower ends of seatback side frames 54, which form the sides of a seatback frame 52, which is a framework member of the seatback 14, and are positioned on the inside in the vehicle width direction. In addition, cushion pads covered with seat coverings are attached to the seat cushion frame 40 and the seatback frame 52.

[0052] On the other hand, as shown in Figures 1 and 3, the lifter mechanism 18 includes a pair of left and right front links 56 provided between the front ends of the left and right side frames 42, 44 and the front ends of the left and right upper rails 26, and a pair of left and right rear links 58 provided between the rear ends of the left and right side frames 42, 44 and the rear ends of the left and right upper rails 26.

[0053] The left and right front links 56 (see Figure 3) are formed, for example, from sheet metal material in an elongated shape along the front-to-rear direction, and the front ends of the left and right front links 56 in the longitudinal direction are connected to brackets 60 fixed to the front ends of the left and right upper rails 26, making them rotatable around an axis along the left-right direction relative to the left and right upper rails 26.

[0054] Furthermore, a circular through-hole (not shown) is formed in the longitudinal rear end of each of the left and right front links 56, and the longitudinal rear end of the connecting pipe 50 is inserted into each through-hole, and the longitudinal rear end of the left and right front links 56 and the connecting pipe 50 are joined by means of welding or the like.

[0055] As a result, the left and right front links 56 are connected to the front ends of the left and right side frames 42, 44 via the connecting pipe 50, and are capable of rotating integrally with the connecting pipe 50 around an axis along the left-right direction relative to the left and right side frames 42, 44.

[0056] The left and right rear links 58 are formed, for example, from sheet metal material into an elongated shape extending in the front-to-rear direction, and the front end portions of the left and right rear links 58 in the longitudinal direction are connected to the vertical wall portion 30C of the anchor bracket 30 fixed to the rear end side of the upper rail 26 via connecting portions (not shown) whose axial direction extends in the left-to-right direction. This makes the left and right rear links 58 rotatable about an axis extending in the left-to-right direction relative to the left and right upper rails 26.

[0057] Furthermore, a circular through-hole (not shown) is formed in the longitudinal rear end of each of the left and right rear links 58, and a longitudinal end of the rear frame 48 is inserted into each through-hole, and the longitudinal rear end of the left and right rear links 58 is joined to the rear frame 48 by means of welding or the like. As a result, the left and right rear links 58 are connected to the rear end of the left and right side frames 42, 44 via the rear frame 48, and are rotatable integrally with the rear frame 48 about an axis along the left-right direction relative to the left and right side frames 42, 44.

[0058] In other words, with the above-mentioned configuration, in the lifter mechanism 18, a four-bar link mechanism is formed by the front link 56, rear link 58, side frames 42, 44 and upper rail 26, and the seat cushion frame 40 is connected to the left and right slide rails 16 so that it can move up and down (raise and lower).

[0059] In this embodiment, the anchor bracket 30 is disposed below the left and right rear links 58 in a plan view. As shown in Fig. 3, a hook-shaped piece 64 hangs down from the lower end of the rear link main body 62 at the longitudinal rear end of the rear link 58A, which is disposed on the inner side in the vehicle width direction of the left and right rear links 58, as shown in Figs. 2 and 4. In addition, an extension piece 66 hangs down from the lower end of the rear link main body 62 on the rear side of the hook-shaped piece 64 in the vehicle fore-and-aft direction.

[0060] The rear link main body 62 is disposed between the side frame 42 and the vertical wall 30C of the anchor bracket 30 in a rear view. The hook-shaped piece 64 hangs down from the rear link main body 62 and is formed in a hook shape so as to straddle the vertical wall 30C along the seat width direction.

[0061] To explain hook-shaped piece 64 in more detail, hook-shaped piece 64 is configured to include a hanging portion 64A, a horizontal wall portion 64B, and a hook portion 64C. Hanging portion 64A hangs down from rear link main body 62, and horizontal wall portion 64B is bent from the lower end of hanging portion 64A toward the inside in the seat width direction and is disposed above vertical wall portion 30C of anchor bracket 30 in the seat up-down direction.

[0062] Further, hook portion 64C hangs down from the tip of horizontal wall portion 64B toward the lower side in the up-down direction of the seat, and is formed so as to face vertical wall portion 30C of anchor bracket 30. Furthermore, hook portion 64C is disposed so as to face extension piece 66 with vertical wall portion 30C of anchor bracket 30 therebetween.

[0063] Although not shown, a resin cover member is provided at the rear end 31 of the anchor bracket 30 shown in Fig. 4. This cover member closes the rear end 31 of the anchor bracket 30. This improves the design when viewed from the rear seat side, prevents foreign objects from entering the anchor bracket 30, and prevents the shoes, etc. of passengers sitting in the rear seat from directly interfering with the anchor bracket 30.

[0064] Here, the cover member is formed in a generally box shape so as to cover the rear end portion 31 of the anchor bracket 30 from the outside. Meanwhile, a hole 67 is formed in the vertical wall portion 30B of the anchor bracket 30, and a hole 68 is formed in the vertical wall portion 30C. Engagement portions formed on the side walls of the cover member are engageable with these holes 67, 68, and the cover member is engaged with the anchor bracket 30 with the engagement portions engaged with the holes 67, 68.

[0065] As described above, the horizontal wall portion 64B of the hook-shaped piece 64 formed on the rear link main body 62 is disposed above the vertical wall portion 30C of the anchor bracket 30 in the seat vertical direction. In addition, the hook portion 64C of the hook-shaped piece 64 is formed to face the vertical wall portion 30C of the anchor bracket 30, and the hook portion 64C is disposed to face the extension piece 66 with the vertical wall portion 30C of the anchor bracket 30 therebetween.

[0066] The cover member engaged with the anchor bracket 30 is positioned so that a part of the cover member straddles the upper end of the vertical wall portion 30C in the gap formed between the extending piece 66, the horizontal wall portion 64B and the hook portion 64C of the hook-shaped piece 64 and the vertical wall portion 30C, with the engaging portions formed on the cover member engaged with the hole 67 formed in the vertical wall portion 30B and the hole 68 formed in the vertical wall portion 30C of the anchor bracket 30. In this way, the cover member is attached to the rear end portion 31 of the anchor bracket 30.

[0067] (Actions and Effects of Vehicle Seats) Next, the operation and effects of the vehicle seat 10 to which the vehicle seat frame structure according to this embodiment is applied will be described.

[0068] 1 and 2, the anchor bracket 30 includes a fixed portion 30A and a vertical wall portion 30C, and the fixed portion 30A is fixed to the upper rail 26 of the slide rail 16 and is disposed along the vehicle width direction and the vehicle front-rear direction. The vertical wall portion 30C stands upright from the inner end (end) of the fixed portion 30A in the seat width direction.

[0069] On the other hand, of the left and right rear links 58, the rear link 58A that is disposed on the inner side in the vehicle width direction is configured to include a rear link main body 62 and a hook-shaped piece 64, and the rear link main body 62 is disposed between the side frame 42 and the vertical wall portion 30C in a rear view. In addition, the hook-shaped piece 64 is formed in a hook shape that hangs down from the rear link main body 62 and straddles the vertical wall portion 30C along the seat width direction.

[0070] When a collision load directed rearward in the vehicle longitudinal direction is input to the seat back 14 during a rear collision of the vehicle, the collision load is transmitted from the lower end of the seat back side frame 54, which constitutes the side portion of the skeleton of the seat back 14, to the rear link 58A via the rear frame 48. The collision load is then transmitted to the anchor bracket 30 via the rear link 58A.

[0071] In this embodiment, in the rear link 58A, a hook-shaped piece 64 is suspended from the rear link main body 62, which is arranged between the side frame 42 and the vertical wall portion 30C in a rear view, so as to straddle the vertical wall portion 30C along the seat width direction, and a portion of the hook-shaped piece 64 overlaps with the vertical wall portion 30C in a plan view.

[0072] For this reason, in the event of a rear-end collision of the vehicle, when a collision load is transmitted to the anchor bracket 30 via the rear link 58A, in this embodiment, the hook-shaped piece 64 formed on the rear link 58A comes into contact with the anchor bracket 30. Because the hook-shaped piece 64 hangs down in a hook shape from the rear link main body 62, when the hook-shaped piece 64 comes into contact with the anchor bracket 30 and deforms, the deformation of the hook-shaped piece 64 absorbs the collision energy.

[0073] As a result, in this embodiment, it is possible to suppress breakage of the seatback side frame 54 in the event of a vehicle collision, compared to when the rear link main body 62 does not have the hook-shaped piece 64 formed thereon.

[0074] 2 and 4, hook-shaped piece 64 is configured to include a hanging portion 64A, a horizontal wall portion 64B, and a hook portion 64C. Hanging portion 64A hangs down from rear link main body 62, and horizontal wall portion 64B is bent from the lower end of hanging portion 64A toward the inside in the seat width direction and is disposed above vertical wall portion 30C of anchor bracket 30 in the seat up-down direction. Hook portion 64C hangs down from the tip of horizontal wall portion 64B toward the lower side in the seat up-down direction and faces vertical wall portion 30C that constitutes a part of anchor bracket 30.

[0075] As a result, in the present embodiment, when a collision load is transmitted to the anchor bracket 30 via the rear link 58A during a rear collision of the vehicle, the lateral wall portion 64B constituting a part of the hook-shaped piece 64 formed on the rear link 58A comes into contact with the anchor bracket 30. Then, the hook-shaped piece 64 is deformed via the lateral wall portion 64B, and the deformation of the hook-shaped piece 64 absorbs the collision energy.

[0076] Furthermore, in this embodiment, an extension piece 66 extends downward in the seat up-down direction from the rear link main body 62. This extension piece 66 is disposed opposite the hook portion 64C of the hook-shaped piece 64 with the vertical wall portion 30C of the anchor bracket 30 therebetween.

[0077] In this way, by providing an extension piece 66 in the rear link main body 62 that faces the hook portion 64C of the hook-shaped piece 64 with the vertical wall portion 30C of the anchor bracket 30 between them, even if a shift occurs along the seat width direction between the rear link main body 62 and the anchor bracket 30 when the rear link main body 62 abuts against the vertical wall portion 30C of the anchor bracket 30, the hook portion 64C or the extension piece 66 can abut and deform, thereby absorbing the collision energy.

[0078] In this embodiment, a cover member is provided on the rear end 31 side of the anchor bracket 30 in the seat front-rear direction, closing the rear end 31 of the anchor bracket 30. Holes 67, 68 with which the cover member can engage are formed in the vertical wall portions 30B, 30C of the anchor bracket 30, respectively, and when the cover member is engaged with the holes 67, 68, a part of the cover member can be clamped between the hook portion 64C of the hook-shaped piece 64 and the extension piece 66.

[0079] In this way, by clamping the portions of the cover member engaged with the holes 67, 68 formed in the vertical wall portions 30B, 30C of the anchor bracket 30, respectively, between the hook portion 64C and the extension piece 66 formed in the rear link main body portion 62, rattling of the cover member is suppressed.

[0080] It should be noted that this cover member is not necessarily required. Also, the shape of the hook-shaped piece 64 is not limited to this as long as it can be deformed by abutting against the vertical wall portion 30C of the anchor bracket 30 and absorb the collision energy.

[0081] In addition, in this embodiment, as shown in FIG. 3, the rear link main body portion 62 is positioned inside the side frame 42 in the seat width direction, and is positioned between the side frame 42 and the vertical wall portion 30C erected from the inner end portion in the seat width direction of the fixing portion 30A of the anchor bracket 30 when viewed from behind, but is not limited to this.

[0082] For example, although not shown, the rear link main body 62 may be disposed on the outer side of the side frame 42 in the seat width direction and, in a rear view, between the side frame 42 and a vertical wall 30B erected from the outer end of the fixing portion 30A of the anchor bracket 30 in the seat width direction. In this case, the hook-shaped piece 64 is formed in a hook shape that hangs down from the rear link main body 62 and straddles the vertical wall 30B along the seat width direction. For this reason, although not shown, the horizontal wall portion of the hook-shaped piece bends from the lower end of the hanging portion toward the outer side in the seat width direction.

[0083] Furthermore, in this embodiment, the rear link 58A on the anchor bracket 30 side arranged on the left side of the vehicle seat 10 has been described. However, taking into consideration the left-right balance of the vehicle seat 10, it goes without saying that the configuration of the rear link 58A may also be applied to the rear link 58 on the bracket side arranged on the right side of the vehicle seat 10, although this is not shown in the figures.

[0084] 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]

[0085] 10 Vehicle seats 12 seat cushions 14 Seat back 16 Slide rail 30 Anchor bracket (bracket) 30A fixing part (bracket) 30C Vertical wall section (bracket) 40 Seat cushion frame 42 Side frame 44 Side frame 56 Front link (lifter link) 58 Rear link (lifter link) 58A Rear link 60 Bracket 62 Rear link body (rear link) 64 Hook-shaped piece (rear link) 64A Hanging part (rear link, hook-shaped piece) 64B Side wall (rear link, hook-shaped piece) 64C hook part 66 Extension piece 68 Hole

Claims

1. A seat cushion frame is a frame of a seat cushion on which an occupant sits. The seat cushion frame includes a pair of side frames that are disposed on outer sides in the seat width direction and extend in the front-rear direction of the seat; a bracket fixed to a slide rail provided on a vehicle body floor and allowing the seat cushion to slide in the front-rear direction of the seat; a lifter link provided at the front and rear of the seat cushion in the vehicle longitudinal direction, arranged with its longitudinal direction along the seat longitudinal direction, one end of which is connected to the side frame and the other end of which is connected to the bracket, and which enables the seat cushion frame to be raised and lowered; Equipped with The bracket is a fixing portion fixed to the slide rail and arranged along the vehicle width direction and the vehicle front-rear direction; a vertical wall portion erected from an end portion of the fixing portion in the seat width direction; The invention comprises: The lifter link includes a rear link provided at a rear portion of the seat cushion in the vehicle front-rear direction, a rear link main body portion disposed between the side frame and the vertical wall portion in a rear view; a hook-shaped piece that hangs down from the rear link main body portion, straddles the vertical wall portion along the seat width direction, and deforms when it comes into contact with the bracket during a vehicle collision to absorb collision energy; A vehicle seat comprising:

2. The vertical wall portion is provided upright from an inner end portion of the fixing portion in the seat width direction, The hook-shaped piece is a hanging portion hanging from the rear link main body; a horizontal wall portion bent from a lower end of the hanging portion toward the inside in the seat width direction and disposed above the vertical wall portion in the seat up-down direction; a hook portion that hangs down from a tip of the horizontal wall portion toward a lower side in the seat up-down direction and faces the vertical wall portion; 2. The vehicle seat according to claim 1, further comprising:

3. 3. The vehicle seat according to claim 2, wherein the rear link has an extension piece formed thereon that extends downward in the seat up-down direction from the rear link main body and is positioned opposite the hook portion with the vertical wall portion therebetween.

4. The vertical wall portion is formed with a hole portion that can engage with an engaging portion formed on a side wall of a cover member that is formed in a substantially box shape and that covers and closes a rear side of the bracket in the seat front-rear direction from the outside, 4. The vehicle seat according to claim 3, wherein an upper end of the side wall of the cover member can be clamped between the hook-shaped piece and the extension piece when the cover member is engaged with the hole.

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