Seat for a vehicle

Abstract

A passenger seat having a seat back that is tiltable relative to a seat cushion is provided in which a locking unit for locking the tilt of a seat back frame is mounted to a side frame, thereby increasing the strength of the side frame periphery and stably supporting the locking unit. A vehicle seat (S) is provided with a seat back (S2) that can be tilted relative to a seat cushion (S1), the seat back (S2) having a seat back frame (2) and a locking unit (30), the locking unit (30) engaging with an engaged portion provided on a vehicle body and locking the tilt of the seat back frame (2), the seat back frame (2) having a side frame (3a) extending in the vertical direction of the passenger seat, a mounting bracket (10) mounted on the side frame (3a) on the outer side in the width direction of the passenger seat, the locking unit (30) being mounted on the outer side surface (11) of the mounting bracket (10) in the width direction of the passenger seat, and the side frame (3a) and the mounting bracket (10) being connected via a reinforcing bracket (20).

Description

[0001] This application is a divisional application of patent application No. 201980056234.9 (PCT / JP2019 / 035409). Technical Field

[0002] The present invention relates to a vehicle seat having a seat back that is tiltable relative to a seat cushion, and more particularly to a vehicle seat having a locking unit that engages with an engaged portion provided on a vehicle body to lock the tilt of the seat back. Background Art

[0003] In a vehicle seat configured so that a seat back can be tilted relative to a seat cushion in a direction toward the seat cushion, it is known to mount a locking unit on a seat back frame to lock the tilt of the seat back.

[0004] For example, Patent Document 1 describes a seat back frame in which brackets are provided at the corners of the side of a frame member formed by bending a tube into a frame shape, and a removable locking unit is attached to a striker supported by the vehicle body. When a passenger takes a seat, the locking unit engages with the striker, securing the bracket and seat back frame to the vehicle body. Patent Document 1: Patent Publication No. 6268294 Summary of the Invention

[0005] To protect passengers from impacts from the front and rear of the vehicle, the seat frame needs to be strengthened. A structure that can stably support the locking unit mounted to the seat frame via a bracket also needs to be strengthened.

[0006] The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a passenger seat capable of improving the strength of the periphery of a side frame of a seat back frame to which a locking unit is mounted, while stably supporting the locking unit.

[0007] The aforementioned problem is solved by the following means. A passenger seat according to the present invention is provided with a seat back that is tiltable relative to a seat cushion, the seat back including a seat back frame and a locking unit that engages with an engaged portion provided on a vehicle body to lock the tilt of the seat back frame. The seat back frame includes side frames and a mounting bracket, the side frames extending in the vertical direction of the passenger seat; the mounting bracket is mounted on the outer side of the side frames in the width direction of the passenger seat; the locking unit is mounted on the outer side of the mounting bracket in the width direction of the passenger seat; and the side frames and the mounting bracket are connected by a reinforcing bracket.

[0008] In the vehicle seat of the present invention configured as described above, the reinforcement bracket increases the strength of the periphery of the side frame to which the locking unit is attached, thereby enabling the locking unit to be stably supported.

[0009] In the above-mentioned passenger seat, it is preferred that the mounting bracket has a front and a rear portion in the front-rear direction of the passenger seat, the front and the rear portion are connected via the outer side surface, and the reinforcement bracket connects the side frame and the front portion of the mounting bracket.

[0010] In the above configuration, by appropriately increasing the strength of the mounting bracket, the locking unit can be supported more stably.

[0011] In the above vehicle seat, it is preferred that the rear surface of the mounting bracket has a convex portion that protrudes forward in a front-rear direction of the vehicle seat, and the mounting bracket is attached to the side frame on the convex portion.

[0012] In the above configuration, since the mounting bracket is stably mounted on the side frame, the locking unit can be supported more stably.

[0013] In the above-mentioned vehicle seat, it is preferable that the mounting bracket includes an opening extending across the rear surface and the outer surface.

[0014] In the above configuration, the outer side surface on which the locking unit is mounted can be ensured without reducing the rigidity of the mounting bracket, thereby achieving weight reduction.

[0015] In the above-mentioned passenger seat, it is preferred that the mounting bracket has an upper portion and a lower portion in the upper and lower directions of the passenger seat, the upper portion has a first recess engaged with the side frame, and the lower portion has a second recess engaged with the side frame, and the mounting bracket is mounted on the side frame in the first recess and the second recess.

[0016] In the above configuration, since the mounting bracket is mounted to the side frame via the upper first recess and the lower second recess in the seat vertical direction, the mounting bracket can be mounted more stably to the side frame.

[0017] In the above-mentioned vehicle seat, it is preferable that the mounting bracket includes slits on each of the upper surface and the lower surface.

[0018] In the above configuration, since the upper and lower surfaces of the mounting bracket each have slits, the upper and lower surfaces having slits can be formed by bending a plate, etc., thereby facilitating the molding of the mounting bracket.

[0019] In the above vehicle seat, it is preferred that the reinforcement bracket includes a front end portion and a rear end portion in the front-rear direction of the vehicle seat, and a reinforcement rib extending between the front end portion and the rear end portion is formed.

[0020] In the above configuration, the rigidity of the reinforcement bracket can be increased by providing the reinforcement ribs.

[0021] In the above-mentioned passenger seat, it is preferred that the reinforcing rib has an upper reinforcing rib at the upper end of the reinforcing bracket and a lower reinforcing rib at the lower end of the reinforcing bracket, and in the front-to-rear direction of the passenger seat, the interval between the upper reinforcing rib and the lower reinforcing rib gradually increases from the front to the rear.

[0022] In the above configuration, since the reinforcement bracket includes the upper and lower ribs whose intervals gradually increase from the front to the rear, the strength against impacts applied from the front-rear direction of the passenger seat can be increased.

[0023] In the above-mentioned passenger seat, it is preferred to include a lock release component, a support bracket and a cable component, wherein the lock release component releases the tilt lock of the seat back frame; the support bracket supports the lock release component; the cable component is mounted on the support bracket, one end of the cable component is mounted on the outer side surface of the mounting bracket, and the other end is mounted on the seat back frame.

[0024] In the above configuration, the lock releasing member can be fixed with a simple structure.

[0025] In the above vehicle seat, preferably, the support bracket includes a front portion and a rear portion in a front-rear direction of the vehicle seat, the front portion is attached to the attachment bracket, and the rear portion is attached to the cable member.

[0026] In the above-described configuration, the lock releasing member can be stably fixed.

[0027] According to the vehicle seat of the present invention, the reinforcement bracket increases the strength of the periphery of the side frame to which the locking unit is attached, thereby stably supporting the locking unit.

[0028] Furthermore, according to the vehicle seat of the present invention, by appropriately increasing the strength of the mounting bracket, the locking unit can be supported more stably.

[0029] Furthermore, according to the vehicle seat of the present invention, the mounting bracket is stably mounted to the side frame, and thus the locking unit can be supported more stably.

[0030] In addition, according to the vehicle seat of the present invention, the outer side surface of the locking unit can be secured without reducing the rigidity of the mounting bracket, thereby achieving weight reduction.

[0031] Furthermore, according to the passenger seat of the present invention, since the mounting bracket is mounted to the side frame via the upper first recess and the lower second recess in the seat vertical direction, the mounting bracket can be mounted more stably to the side frame.

[0032] Furthermore, according to the passenger seat of the present invention, the upper and lower surfaces of the mounting bracket are each provided with slits. The upper and lower surfaces provided with slits can be formed by bending a plate, etc., thereby facilitating the molding of the mounting bracket.

[0033] Furthermore, according to the vehicle seat of the present invention, the rigidity of the reinforcement bracket can be increased by providing the reinforcement rib.

[0034] Furthermore, according to the vehicle seat of the present invention, since the reinforcement bracket includes the upper and lower ribs whose spacing gradually increases from the front to the rear, the strength against impacts applied from the front-rear direction of the vehicle seat can be increased.

[0035] Furthermore, according to the vehicle seat of the present invention, the lock release member can be fixed with a simple structure.

[0036] Furthermore, according to the vehicle seat of the present invention, the lock releasing member can be stably fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is an external view of a vehicle seat according to a first embodiment of the present invention.

[0038] Figure 2 This is an external view of a seat frame of a vehicle seat according to a first embodiment of the present invention.

[0039] Figure 3 This is a partially enlarged view showing the structure around the locking unit of the seat frame according to the first embodiment of the present invention.

[0040] Figure 4 This is a partially enlarged view showing the structure around the locking unit of the seat frame according to the first embodiment of the present invention.

[0041] Figure 5 This is an external view of a mounting bracket for a vehicle seat according to a first embodiment of the present invention.

[0042] Figure 6 This is an external view of a mounting bracket for a vehicle seat according to a first embodiment of the present invention.

[0043] Figure 7 This is an external view of a mounting bracket for a vehicle seat according to a first embodiment of the present invention.

[0044] Figure 8 This is an external view of a mounting bracket for a vehicle seat according to a first embodiment of the present invention.

[0045] Figure 9 This is an external view of a mounting bracket for a vehicle seat according to a first embodiment of the present invention.

[0046] Figure 10 This is an external view of a mounting bracket for a vehicle seat according to a first embodiment of the present invention.

[0047] Figure 11 This is an external view of a reinforcement bracket for a vehicle seat according to a first embodiment of the present invention.

[0048] Figure 12 This is an external view of a reinforcement bracket for a vehicle seat according to a first embodiment of the present invention.

[0049] Figure 13 This is a partially exploded view of a seat frame of a vehicle seat according to a first embodiment of the present invention.

[0050] Figure 14 This is an external view of a seat frame of a vehicle seat according to a modified example of the first embodiment of the present invention.

[0051] Figure 15 This is an external view of a reinforcement bracket for a vehicle seat according to a modified example of the first embodiment of the present invention.

[0052] Figure 16 This is a partially enlarged view showing the structure around a locking unit of a seat frame according to a modified example of the first embodiment of the present invention.

[0053] Figure 17 This is a perspective view of the appearance of a vehicle seat according to a second embodiment of the present invention.

[0054] Figure 18 This is an external perspective view of a seat frame of a vehicle seat according to a second embodiment of the present invention.

[0055] Figure 19 This is an enlarged perspective view of a main portion of a seat frame according to a second embodiment of the present invention.

[0056] Figure 20 This is an enlarged view of a main part of a front view of a seat frame according to a second embodiment of the present invention.

[0057] Figure 21It is a diagram illustrating an assembled state of a mounting bracket, a cable member, and a reinforcement bracket of a vehicle seat according to a second embodiment of the present invention.

[0058] Figure 22 This is an enlarged view of a main part of a rear view of a seat frame according to a second embodiment of the present invention.

[0059] Figure 23 for Figure 20 VII-VII cross-section diagram.

[0060] Figure 24 This is a perspective view of the appearance of a vehicle seat according to a third embodiment of the present invention.

[0061] Figure 25 This is a perspective view of the appearance of a seat frame of a vehicle seat according to a third embodiment of the present invention.

[0062] Figure 26 This is an enlarged view of a main part of a front view of a backrest frame of a vehicle seat according to a third embodiment of the present invention.

[0063] Figure 27A This is a perspective view of a backrest frame of a vehicle seat according to a third embodiment of the present invention, illustrating an assembled state of a panel bracket and a mounting bracket.

[0064] Figure 27B This is a perspective view of a backrest frame viewed from behind a vehicle seat according to a third embodiment of the present invention, illustrating an assembled state of a panel bracket and a mounting bracket.

[0065] Figure 28A It is a front view of a mounting bracket for a vehicle seat according to a third embodiment of the present invention.

[0066] Figure 28B This is a rear view of a mounting bracket for a vehicle seat according to a third embodiment of the present invention.

[0067] Figure 29 for Figure 26 VI-VI cross-sectional view. DETAILED DESCRIPTION

[0068] <Vehicle Seat According to First Embodiment>

[0069] Below, refer to Figures 1-16 , a vehicle seat installed in a vehicle will be described as an example of a vehicle seat according to a first embodiment of the present invention (hereinafter referred to as the present embodiment).

[0070] In addition, the embodiment described below is only an example to make the present invention easy to understand and does not limit the present invention. That is, the shape, size, configuration, etc. of the components described below do not depart from the main purpose of the present invention. When changing or improving, it is undoubted that the present invention includes its equivalent.

[0071] Regarding the terms indicating directions in this manual, Figure 1 The various directions are defined as shown. Specifically, in the following description, the "front-rear direction" refers to the front-rear direction as viewed by a seated vehicle seat user, which corresponds to the vehicle's travel direction. The "seat width direction" refers to the lateral width of the vehicle seat, which corresponds to the left-right direction as viewed by a seated vehicle seat user. Furthermore, the "up-down direction" refers to the height of the vehicle seat, which corresponds to the up-down direction when the vehicle seat is viewed from the front.

[0072] [1. Main Components of Vehicle Seat S]

[0073] The vehicle seat S of this embodiment is a rear seat corresponding to the right rear seat of the vehicle. Figure 1 In addition, Figure 1 , for convenience of illustration, a portion of the vehicle seat S is shown with the decorative cover removed.

[0074] The vehicle seat S mainly comprises a seat cushion S1 serving as a seating portion that supports the seated person's buttocks, a seat back S2 serving as a backrest portion that supports the seated person's back, and a headrest S3 disposed above the seat back S2 and supporting the seated person's head. The seat back S2 is rotatably supported by a support base (not shown).

[0075] The vehicle seat S can be transitioned from a passenger-accessible position to a stowed position, in which the seat cushion S1, seat back S2, and headrest S3 (hereinafter referred to as the seat body) are stored in a stowed floor. Specifically, by pulling up an operating lever (a lock release member 41 described below), the vehicle seat S is tilted and folded toward the seat cushion S1, thereby transitioning to the stowed position. Alternatively, the passenger can manually pull the seat body upward to return the stowed position to the passenger's position.

[0076] Seat pad S1 is passed in Figure 2 The seat cushion frame 1 as a frame shown is constructed by placing a cushion S11 on the seat cushion and further covering the cushion S11 with a decorative cover S12. Figure 2The seat back frame 2 shown as the frame is constructed by placing a cushion pad S21 on top and covering it with a decorative cover S22. The headrest S3 is formed by placing a cushion pad S31 on a core material (not shown) and covering it with a decorative cover S32. The cushion pads S11, S21, and S31 are made of an elastic cushioning material such as polyurethane foam, while the decorative covers S12, S22, and S32 are made of synthetic leather or cloth, formed by sewing together multiple skin materials.

[0077] [2. Overview of the Seat Frame]

[0078] First, refer to Figure 2 The outline of the structure of the seat frame F will be described. Figure 2 express Figure 1 The seat frame F of the right side seat of the vehicle seat S shown in FIG. Figure 2 As shown, the seat frame F is mainly composed of a seat cushion frame 1 and a seat back frame 2. The seat cushion frame 1 constitutes the framework of the seating portion of the vehicle seat S, and the seat back frame 2 constitutes the framework of the backrest portion of the vehicle seat S.

[0079] like Figure 2 As shown in FIG. 1 , the seat cushion frame 1 has a square frame-like outer shape when viewed from above. The seat cushion frame 1 mainly comprises side frames constituting the ends in the seat width direction and a plate frame constituting the front end of the seat cushion frame 1. The seat cushion frame 1 is provided with support legs 1a, which are positioned so that a passenger can sit down. Figure 1 As shown, the support leg 1a is engaged and fixed with a support base (not shown).

[0080] The seat back frame 2 includes a pipe frame 3 and a backboard 4 provided behind the seat of the pipe frame 3. The pipe frame 3 is a substantially rectangular frame formed by folding a metal pipe member. Figure 2 As shown, it is composed of a pair of side frames 3a arranged at intervals on the left and right and extending in the longitudinal direction (seat vertical direction), an upper frame 3b connecting the upper ends of the pair of side frames 3a, and a lower frame 3c connecting the lower ends.

[0081] A substantially flat surface extending in the seat width direction is formed on the front face of the upper frame 3b. A pair of pillar supports for supporting headrest pillars (not shown) are mounted on the portion forming this substantially flat surface. The headrest pillars (not shown) are inserted into the pillar supports, and the headrest S3 is mounted on the pillar supports.

[0082] The backrest board 4 is a generally rectangular metal panel member. The left and right ends of the backrest board 4 in the seat width direction are welded to the left and right side frames 3a of the pipe frame 3. Furthermore, the upper and lower portions of the backrest board 4 in the seat vertical direction are welded to the upper frame 3b and lower frame 3c, respectively.

[0083] [3. How to install the locking unit]

[0084] The vehicle seat S is provided with a locking unit 30 for locking the tilt of the seat back frame 2 (seat back S2). Figure 3 and Figure 4 The mounting of the locking unit 30 with respect to the seat frame F will be described.

[0085] Figure 3 and Figure 4 This is a partially enlarged view showing the structure around the locking unit 30 mounted on the seat frame F. Figure 3 The figure shows the structure around the locking unit 30 as seen from the front of the seat. Figure 4 The structure around the locking unit 30 as viewed from behind the seat is shown.

[0086] like Figure 3 and Figure 4 As shown, a mounting bracket 10 is mounted on the outer side of the side frame 3a in the seat width direction, and a locking unit 30 is mounted on the outer side surface 11 of the mounting bracket 10 in the seat width direction. Figure 4 As shown, the locking unit 30 includes a locking piece 33 that engages with an engaged portion (striker) not shown provided on the vehicle body to lock the tilt of the seat back frame 2 (seat back S2 ).

[0087] like Figure 3 and Figure 4 As shown, the side frame 3a is connected to the mounting bracket 10 via the reinforcement bracket 20. In addition, the lock release member 41 (operating lever) for releasing the tilt lock of the seat back frame 2 (seat back S2) is supported in a rotatable manner relative to the support bracket 40. Figure 3 and Figure 4 As shown, in the front-rear direction of the seat, the front portion 42 of the support bracket 40 is mounted on the mounting bracket 10, and the rear portion 43 is mounted on the cable member 50. Figure 3 and Figure 4 In the figure, the dotted shaded areas represent welding marks.

[0088] (Mounting bracket 10)

[0089] Below, refer to Figures 5 to 10 The structure of the mounting bracket 10 will be described.

[0090] Figure 5 This is an appearance diagram of the mounting bracket 10. Figure 6 This is an appearance diagram of the mounting bracket 10 as seen from the front upper side. Figure 7 This is an appearance diagram of the mounting bracket 10 as seen from the front lower side. Figure 8This is an appearance diagram of the mounting bracket 10 as seen from the upper rear side. Figure 9 This is an appearance diagram of the mounting bracket 10 as seen from the outside in the seat width direction. Figure 10 This is an external view of the mounting bracket 10 as viewed from the inner side in the seat width direction.

[0091] like Figures 5 to 10 As shown, the mounting bracket 10 includes an outer side surface 11 disposed in the seat width direction, a front surface 12 and a rear surface 13 disposed in the seat front-back direction, and an upper surface 14 and a lower surface 15 disposed in the seat vertical direction. Here, the outer side surface 11 connects the front surface 12 and the rear surface 13 in the seat front-back direction, and connects the upper surface 14 and the lower surface 15 in the seat vertical direction. Figure 5 As shown, the mounting bracket 10 has a generally box shape.

[0092] like Figure 5 、 Figure 9 and Figure 10 As shown, the outer side surface 11 of the mounting bracket 10 has an opening 11a that spans the rear surface 13. In addition, the outer side surface 11 has two mounting holes 11b in the seat vertical direction. These mounting holes 11b are used when mounting the locking unit 30 and are located closer to the front surface 12 than the rear surface 13 in the seat front-to-back direction.

[0093] like Figure 5 and Figure 10 As shown, a convex portion 13a protruding toward the front of the seat front-back direction is formed on the rear surface 13 of the mounting bracket 10. In other words, a convex portion 13a protruding toward the outer side surface 11 is formed on the rear surface 13 of the mounting bracket 10. Figure 4 As shown, the mounting bracket 10 is welded at the protrusion 13a and mounted to the side frame 3a.

[0094] like Figure 5 and Figure 7 As shown in FIG. 1 , the upper surface 14 of the mounting bracket 10 has a recess 14a (first recess), and the lower surface 15 has a recess 15a (second recess). Specifically, as shown in FIG. Figure 4 and Figure 5 As shown, the upper surface 14 of the mounting bracket 10 is formed with a recess 14a having an outer shape that curves from the inner side in the seat width direction toward the outer side (in other words, toward the outer side surface 11). Figure 5 As shown, the lower surface 15 of the mounting bracket 10 forms a recess 15 a having an outer shape curved from the inner side in the seat width direction toward the outer side (in other words, toward the outer side surface 11 ).

[0095] like Figure 3 and Figure 4As shown, the mounting bracket 10 is welded to the side frame 3a at the recessed portion 14a of the upper side 14. Although not shown, the mounting bracket 10 is similarly welded to the side frame 3a at the recessed portion 15a of the lower side 15. Since the mounting bracket 10 is attached to the side frame 3a at two locations in the vertical direction of the seat, namely, the recessed portion 14a of the upper side 14 and the recessed portion 15a of the lower side 15, the mounting bracket 10 is relatively stable relative to the side frame 3a.

[0096] like Figure 5 As shown, the mounting bracket 10 has a slit 14b on the upper surface and a slit 15b on the lower surface 15. Slit 14b is formed in the upper surface 14 so as to extend from a corner adjacent to the outer surface 11 and the rear surface 13 toward the recess 14a. Similarly, slit 15b is formed in the lower surface 15 so as to extend from a corner adjacent to the outer surface 11 and the rear surface 13 toward the recess 15a.

[0097] Mounting bracket 10 is formed by punching and bending a single metal plate. Since top surface 14 and bottom surface 15 of mounting bracket 10 are provided with slits 14b and 15b, respectively, these slits 14b and 15b can be formed by bending the metal plate, thereby simplifying the molding process of mounting bracket 10. Similarly, mounting bracket 10 includes an opening 11a extending across outer surface 11 and rear surface 13, simplifying the molding process of mounting bracket 10 while ensuring that the outer surface 11 of locking unit 30 can be mounted without compromising rigidity and achieving lightweight design.

[0098] (Reinforcement bracket 20)

[0099] Below, refer to Figure 11 and Figure 12 The structure of the reinforcement bracket 20 will be described.

[0100] Figure 11 This is an appearance diagram of the reinforcement bracket 20 as seen from the front. Figure 12 FIG. 2 is an appearance diagram of the reinforcement bracket 20 as seen from the rear.

[0101] The reinforcement bracket 20 is formed by a bent plate-like member made of metal. When mounted on the seat back frame 2 of the vehicle seat S, it includes a base 21, a front end 22, and a rear end 23. The base 21 includes an upper end 21a and a lower end 21b arranged in the vertical direction of the seat; the front end 22 and the rear end 23 are bent from the base 21 in the longitudinal direction of the seat. Figure 11 and Figure 12 As shown, in the seat up-down direction, the length of the front end portion 22 is shorter than the length of the rear end portion 23 .

[0102] like Figure 10 and Figure 11 As shown, the reinforcing bracket 20 is formed with reinforcing ribs 24a and 24b extending between the front end 22 and the rear end 23. Specifically, the reinforcing rib 24a (upper reinforcing rib) is formed near the upper end 21a of the reinforcing bracket 20, and the reinforcing rib 24b (lower reinforcing rib) is formed near the lower end 21b. The provision of the reinforcing ribs 24a and 24b improves the rigidity of the reinforcing bracket 20. In addition, as shown in FIG. Figure 3 As shown, when the reinforcement bracket 20 is mounted on the seat back frame 2 , the reinforcement ribs 24 a and 24 b are arranged so as to protrude forward from the base portion 21 .

[0103] Furthermore, according to the vehicle seat S, the upper reinforcing rib (reinforcing rib 24a) is provided at the upper end portion 21a of the reinforcement bracket 20, and the lower reinforcing rib (reinforcing rib 24b) is provided at the lower end portion 21b of the reinforcement bracket 20. In the front-to-back direction of the vehicle seat S, the spacing between the upper reinforcing rib (reinforcing rib 24a) and the lower reinforcing rib (reinforcing rib 24b) gradually increases from the front to the rear. Therefore, since the reinforcement bracket 20 has the upper reinforcing rib (reinforcing rib 24a) and the lower reinforcing rib (reinforcing rib 24b) whose spacing gradually increases from the front to the rear, the strength against impacts applied from the front-to-back direction of the vehicle seat S can be improved.

[0104] like Figure 3 and Figure 10 As shown, in the front-to-back direction of the seat, the spacing between the reinforcing ribs 24a and 24b gradually increases from the front to the rear. In other words, the spacing between the reinforcing ribs 24a and 24b gradually increases from the front end 22 to the rear end 23 of the reinforcing bracket 20.

[0105] like Figure 3 As shown, the front end 22 of the reinforcing rib 20 is welded to the front face 12 of the mounting bracket 10, while the rear end 23 is welded to the inner side of the side frame 3a in the seat width direction. The use of the reinforcing bracket 20 increases the strength of the area around the side frame 3a to which the mounting bracket 10 is attached, allowing the locking unit 30 to be stably supported by the mounting bracket 10. Furthermore, the reinforcing bracket 20 connects the side frame 3a to the front face 12 of the mounting bracket 10, thereby appropriately increasing the strength of the mounting bracket 10 attached to the side frame 3a and providing more stable support for the locking unit 30.

[0106] (Locking unit 30)

[0107] Figure 13 This is a partial exploded view of the seat frame F. Figure 13As shown, the locking unit 30 has an inner side surface 31 on the inner side in the seat width direction. A mounting hole 32 is formed on the inner side surface 31 for mounting the locking unit 30 on the mounting bracket 10. The locking unit 30 is connected to a lock release member 41, which is rotatably supported on the support bracket 40.

[0108] The locking unit 30 includes a spring member (not shown) and a locking piece 33 ( Figure 4 ) is a known locking unit, wherein the locking piece 33 engages with a striker (engaged portion) supported by the vehicle body, not shown, thereby locking the tilt of the seat back frame 2. Furthermore, when the passenger rotates the lock release member 41, the spring member included in the locking unit 30 expands, disengaging the locking piece 33 from the striker, thereby releasing the tilt lock of the seat back frame 2.

[0109] The mounting hole 32 provided on the inner side surface 31 of the locking unit 30 is aligned with the mounting hole 11b provided on the outer side surface 11 of the mounting bracket 10. The mounting holes 32 are connected to each other by fastening members (e.g., bolts) (not shown), thereby securing the locking unit 30 to the outer side surface 11 of the mounting bracket 10. In this manner, the locking unit 30 is attached to the side frame 3a of the pipe frame 3 constituting the seat back frame 2 via the mounting bracket 10.

[0110] (Cable member 50)

[0111] like Figure 3 and Figure 4 As shown, the cable member 50 is formed by bending a cable and includes a first extension portion 51 and a second extension portion 52 extending in the seat vertical direction, and a connecting portion 53 connecting the first extension portion 51 and the second extension portion 52. Figure 3 and Figure 4 As shown, the first end 51a of the first extension portion 51 is welded to the outer side surface 11 of the mounting bracket 10, and the second end 52a of the second extension portion 52 is welded to the upper frame 3b. Furthermore, at the end opposite to the first end 51a of the first extension portion 51, namely the first bent portion 51b, a cable is bent and connected to a connecting portion 53. Furthermore, at the end opposite to the second end 52a of the second extension portion 52, namely the second bent portion 52b, a cable is bent and connected to a connecting portion 53.

[0112] In this manner, since the first end portion 51a of the cable member 50 is attached to the outer side surface 11 of the mounting bracket 10 and the second end portion 52a is attached to the seat back frame 2 (upper frame 3b), the support bracket 40 and the lock release member 41 are secured with a simple structure. Furthermore, in the seat front-to-back direction, the front portion 42 of the support bracket 40 is welded and fixed to the front surface 12 of the mounting bracket 10, and the rear portion 43 is attached to the connecting portion 53 of the cable member 50, thereby stably supporting the lock release member 41.

[0113] <Description of the Effects Achieved by the Car Seat S>

[0114] The vehicle seat S (passenger seat) described above is a vehicle seat S having a seat back S2 that can be tilted relative to a seat cushion S1. The seat back S2 includes a seat back frame 2, a locking unit 30 that engages with an engaged portion (striker) provided on the vehicle body and locks the tilt of the seat back frame 2, the seat back frame 2 having side frames 3a extending in the vertical direction of the vehicle seat S, and mounting brackets 10 mounted on the side frames 3a on the outside of the vehicle seat S in the width direction, the locking unit 30 being mounted on the outer side surfaces 11 of the mounting bracket 10 in the width direction of the vehicle seat S, and the side frames 3a and the mounting bracket 10 being connected by a reinforcing bracket 20.

[0115] Therefore, the reinforcement bracket increases the strength of the periphery of the side frame to which the locking unit 30 is mounted, thereby stably supporting the locking unit 30 .

[0116] Furthermore, according to the vehicle seat S, the mounting bracket 10 includes a front portion 12 and a rear portion 13 in the front-to-rear direction of the vehicle seat S. The front portion 12 and the rear portion 13 are connected by the outer side surface 11, and the reinforcing bracket 20 connects the side frame 3a and the front portion 12 of the mounting bracket 10. Therefore, by appropriately increasing the strength of the mounting bracket 10, the locking unit 30 can be supported more stably.

[0117] Furthermore, according to the vehicle seat S, the rear surface 13 of the mounting bracket 10 has a protrusion 13a that protrudes forward in the front-rear direction of the vehicle seat S. The mounting bracket 10 is attached to the side frame 3a at the protrusion 13a. Therefore, the mounting bracket 10 is stably attached to the side frame 3a, and the locking unit 30 can be supported more stably.

[0118] Furthermore, according to the vehicle seat S, the mounting bracket 10 includes the opening 11 a extending across the rear surface 13 and the outer surface 11 . This ensures that the outer surface 11 for mounting the locking unit 30 is secured without reducing the rigidity of the mounting bracket 10 , thereby achieving weight reduction.

[0119] Furthermore, according to the vehicle seat S, the mounting bracket 10 includes an upper surface 14 and a lower surface 15 in the vertical direction of the vehicle seat S. The upper surface 14 has a first recess (recess 14a) that engages with the side frame 3a, and the lower surface 15 has a second recess (recess 15a) that engages with the side frame 3a. The mounting bracket 10 is attached to the side frame 3a at the first recess (recess 14a) and the second recess (recess 15a). Therefore, since the mounting bracket 10 is attached to the side frame 3a in the vertical direction of the seat via the first recess (recess 14a) of the upper surface 14 and the second recess (recess 15a) of the lower surface 15, the mounting bracket 10 is more stably attached to the side frame 3a.

[0120] Furthermore, according to the vehicle seat S, the mounting bracket 10 includes the slits 14b and 15b on the upper surface 14 and the lower surface 15, respectively. Therefore, since the slits 14b and 15b are provided on the upper surface 14 and the lower surface 15 of the mounting bracket 10, respectively, the upper surface 14 and the lower surface 15 including the slits 14b and 15b can be formed by bending a plate, for example, thereby facilitating the molding of the mounting bracket 10.

[0121] Furthermore, according to the vehicle seat S, the reinforcement bracket 20 includes a front end portion 22 and a rear end portion 23 in the front-rear direction of the vehicle seat S, and is provided with reinforcement ribs 24a and 24b extending between the front end portion 22 and the rear end portion 23. Therefore, the provision of the reinforcement ribs 24a and 24b can improve the rigidity of the reinforcement bracket 20.

[0122] Furthermore, according to the vehicle seat S, the reinforcing ribs 24a and 24b include an upper reinforcing rib (reinforcing rib 24a) at the upper end portion 21a of the reinforcing bracket 20 and a lower reinforcing rib (reinforcing rib 24b) at the lower end portion 21b of the reinforcing bracket 20. In the front-to-back direction of the vehicle seat S, the spacing between the upper reinforcing rib (reinforcing rib 24a) and the lower reinforcing rib (reinforcing rib 24b) gradually increases from the front to the rear. Therefore, since the reinforcing bracket 20 includes the upper reinforcing rib (reinforcing rib 24a) and the lower reinforcing rib (reinforcing rib 24b) with the spacing gradually increasing from the front to the rear, the strength against impacts applied from the front-to-back direction of the vehicle seat S can be improved.

[0123] Furthermore, the vehicle seat S includes a lock release member 41 for releasing the tilt lock of the seat back frame 2, a support bracket 40 that supports the lock release member 41, and a cable member 50 attached to the support bracket 40. One end portion (first end portion 51a) of the cable member 50 is attached to the outer side surface 11 of the mounting bracket 10, and the other end portion (second end portion 52a) of the cable member 50 is attached to the seat back frame 2 (upper frame 3b). Therefore, the lock release member 41 can be fixed with a simple structure.

[0124] In addition, if Figure 3and Figure 4 As shown, the front portion 42 of the support bracket 40 is welded to the front surface 12 of the mounting bracket 10, and the rear portion 43 is welded to the connecting portion 53 of the cable member 50. Therefore, the support bracket 40 is stably fixed and can stably support the lock release member 41.

[0125] <Modification>

[0126] The above description describes the structure of a vehicle seat S according to one embodiment of the present invention. However, the above embodiment is merely an example to facilitate understanding of the present invention and does not limit the present invention. The present invention may be modified and improved without departing from the spirit and scope of the present invention, and it is understood that the present invention includes equivalents.

[0127] In particular, the structure, material, shape, and size of each element constituting the vehicle seat S are not limited to those described in the above-mentioned embodiment, and any design is possible without departing from the spirit of the present invention.

[0128] In the above embodiment, the vehicle seat S is described as an example of a rear seat corresponding to the rear of a vehicle. The vehicle seat S according to this embodiment can also be used as a middle seat in the second row of a vehicle having three rows of seats in the vehicle front-rear direction.

[0129] Figure 14 FIG is an external view of a seat frame FX of a vehicle seat according to a modification of the present embodiment. Figure 14 As shown, the seat frame FX is mainly composed of a seat cushion frame 1X and a seat back frame 2X. The seat cushion frame 1X constitutes the framework of the seat portion, and the seat back frame 2X constitutes the framework of the back portion.

[0130] The seat back frame 2X includes a pipe frame 3 and a plurality of cable frames W spanned between the left and right pipe frames 3 in the seat width direction. The pipe frame 3 is a substantially rectangular frame formed by bending a pipe member. Figure 14 As shown, it is composed of side frames 3a spaced apart from each other and extending in the longitudinal direction (vertical direction), an upper frame 3b connecting the upper ends of the side frames 3a, and a lower frame 3c connecting the lower ends.

[0131] Figure 15 An external view of a reinforcement bracket 20X according to a modified example is shown. Figure 16 A partially enlarged view showing the structure around the locking unit of a seat frame according to a modified example. The reinforcement bracket 20X includes a base 21X, a front end 22X, and a rear end 23X. The base 21X includes an upper end 21Xa and a lower end 21Xb in the seat vertical direction. The front end 22X and the rear end 23X are bent from the base 21X in the seat longitudinal direction. Figure 15As shown, the reinforcement bracket 20X is formed with reinforcement ribs 24Xa and 24Xb extending between the front end portion 22X and the rear end portion 23X. Specifically, the reinforcement rib 24Xa (upper reinforcement rib) is formed near the upper end portion 21Xa of the reinforcement bracket 20X, and the reinforcement rib 24Xb (lower reinforcement rib) is formed near the lower end portion 21Xb.

[0132] like Figure 15 and Figure 16 As shown in FIG, in the front-rear direction of the seat, the spacing between the reinforcing ribs 24Xa and 24Xb is kept constant. Figure 16 As shown, the reinforcement bracket 20X is welded to the front face 12 of the mounting bracket 10 at the front end 22X and welded to the side frame 3a at the rear end 23X. Figure 16 As shown, a cover member 60X is provided on the outer side of the locking unit 30 in the seat width direction to protect the locking unit 30 .

[0133] The passenger seat according to this embodiment has been described above primarily using a vehicle seat as an example. However, the passenger seat according to this embodiment is not limited to a vehicle seat installed in a ground-moving vehicle with wheels, such as an automobile or train. For example, the passenger seat may also be a seat installed in an aircraft or ship that is not located on the ground.

[0134] <Vehicle Seat According to Second Embodiment>

[0135] Next, a vehicle seat according to a second embodiment will be described. When describing the vehicle seat according to the second embodiment, issues related to the vehicle seat will be described.

[0136] Conventionally, a vehicle seat is known in which a cable member (anchor member) for fixing a child seat is attached to a back frame or a cushion frame serving as a seat frame. Various attempts have been made to improve the attachment rigidity of the cable member.

[0137] For example, in the vehicle seat described in Japanese Patent Application Laid-Open No. 2009-202788, a U-shaped cable member for fixing a child seat is attached to the rear end of a cushion frame.

[0138] Specifically, the cable member is fixed to the connecting pipe extending in the left-right direction at the rear end of the pad frame and is engaged with the flange portion formed on the upper end of the left and right pad side frames.

[0139] In addition, in the vehicle seat described in Japanese Patent Application Laid-Open No. 2014-151660, an anchor member for fixing the child seat is fixed to a connecting pipe located at the rear end of the cushion frame via a bracket.

[0140] (Problems to be Solved by the Vehicle Seat According to the Second Embodiment)

[0141] However, in the vehicle seat described in Japanese Patent Application Laid-Open No. 2009-202788, the cable member is joined to the seat frame at multiple locations.

[0142] Therefore, there is a need for a vehicle seat that can ensure easy installation workability while improving the installation rigidity of the cable member.

[0143] Furthermore, in the vehicle seat described in Japanese Patent Application Laid-Open No. 2014-151660, the anchor member is attached to the seat frame via another type of bracket.

[0144] Therefore, there is a need for a vehicle seat that can suppress an increase in weight and that can mount a cable member in a relatively compact configuration.

[0145] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a vehicle seat that ensures simple installation workability while improving the installation rigidity of a cable member (particularly a cable member for fixing a child seat).

[0146] Another object of the present invention is to provide a vehicle seat in which a cable member can be mounted in a relatively compact arrangement while suppressing an increase in weight.

[0147] The above-mentioned problem is solved by the following means. According to the present invention, the vehicle seat includes a backrest frame serving as a framework for a backrest portion, a mounting bracket disposed on an outer portion of the backrest frame in a seat width direction and attached to a lower portion of the backrest frame, and a cable member attached to the lower portion of the backrest frame and the mounting bracket, the cable member having an inner end portion disposed on an inner side in the seat width direction and attached to the backrest frame, and an outer end portion disposed on an outer side in the seat width direction and attached to an outer portion of the mounting bracket in the seat width direction.

[0148] As described above, since the cable member has an inner end portion that is disposed inward in the seat width direction and attached to the lower portion of the backrest frame, and an outer end portion that is disposed outward in the seat width direction and attached to the outer portion of the mounting bracket in the seat width direction, simple installation workability can be ensured. Furthermore, since the outer end portion of the cable member is disposed and attached to the outer portion of the mounting bracket, it can be relatively firmly attached to the mounting bracket.

[0149] Therefore, compared with the conventional technology, it is possible to realize a vehicle seat that ensures simple installation workability while improving the installation rigidity of the cable member (particularly the cable member for fixing the child seat).

[0150] Furthermore, a vehicle seat is achieved in which an increase in weight can be suppressed and a cable member can be mounted in a relatively compact arrangement.

[0151] In this case, it is preferable that the mounting bracket is mounted on an outer side surface of the backrest frame to connect the backrest frame and a support base provided on a vehicle body floor.

[0152] According to the above configuration, since the mounting bracket is a highly rigid member connecting the back frame and the support base located on the vehicle body floor, the mounting rigidity of the cable member mounted on the outer side surface of the mounting bracket is improved.

[0153] At this time, it is preferred that the backrest frame has a frame-shaped main frame composed of a pipe component, the inner end portion is installed on the lower end portion of the main frame and extends along the outer peripheral surface of the lower end portion in the front-rear direction of the seat, and the outer end portion extends along the outer surface of the mounting bracket in the front-rear direction of the seat.

[0154] As described above, since the inner and outer ends of the cable member are attached so as to extend in the seat longitudinal direction, the cable member can maintain its mounting rigidity when subjected to external loads in the seat longitudinal direction or loads caused by sudden starting or stopping.

[0155] At this time, it is preferred that the mounting bracket includes a side wall portion arranged on the outside of the main frame in the seat width direction, a front wall portion that is continuous and bent from one end portion in the width direction of the side wall portion and extends toward the front of the main frame, and a rear wall portion that is continuous and bent from the other end portion in the width direction of the side wall portion and extends toward the rear of the main frame while being opposite to the front wall portion. In the mounting bracket, the front wall portion and the rear wall portion are joined to the main frame.

[0156] In addition, it is preferred that the side wall portion extends in the vertical direction along the main frame, and a curved portion that bends inward in the seat width direction along the main frame is formed between a portion of the side wall portion corresponding to the main frame in the seat vertical direction and a lower end portion on which the cable component is installed.

[0157] According to the above configuration, the mounting rigidity of the mounting bracket relative to the main frame is improved, and the mounting rigidity of the cable member is also improved.

[0158] At this time, it is preferred that a cushion frame serving as a skeleton of the seating portion is provided, the cushion frame having a cushion side frame mounted on the outer side of the main frame in the seat width direction and constituting a side in the seat width direction, the outer end being arranged in a gap formed between the mounting bracket and the cushion side frame in the seat width direction.

[0159] According to the above configuration, the cable component can be installed in a relatively compact configuration. In addition, if the vehicle seat has a reclining structure, a stable reclining action of the seat back can be achieved.

[0160] At this time, it is preferred that the main frame has left and right side frame portions arranged on the sides in the seat width direction, and a lower frame portion connecting the lower ends of the left and right side frame portions, the mounting bracket is mounted on the outer side surfaces of the side frame portions, and a reinforcing bracket is provided on the main frame, which connects the portion of the side frame portion on which the mounting bracket is mounted and the lower frame portion.

[0161] According to the above configuration, the rigidity of the backrest frame can be improved. In particular, when a relatively large load is applied to the seat in the front-rear direction, the frame-shaped main frame formed of the pipe member can be prevented from being twisted.

[0162] In this case, the reinforcement bracket preferably has a substantially U-shaped cross section, and a peripheral portion of the end portion of the reinforcement bracket attached to the lower frame portion has a stepped portion curved toward one side in the seat longitudinal direction.

[0163] According to the above structure, the rigidity of the backrest frame can be further improved. In addition, by installing the reinforcement bracket around the corner of the main frame, even if the main frame itself is changed into a simple shape, the frame rigidity can be ensured, so that the result can achieve lightweighting, cost reduction, and sharing of components.

[0164] At this time, it is preferred that the reinforcing bracket has a side wall portion arranged inside the frame shape of the main frame, a front wall portion that is continuous and bent from one end portion in the width direction of the side wall portion and extends toward the front of the main frame, and a rear wall portion that is continuous and bent from the other end portion in the width direction of the side wall portion and extends toward the rear of the main frame relative to the front wall portion. The front wall portion and the rear wall portion are joined to the main frame, and the side wall portions are formed with cutout portions at both ends close to the main frame to avoid interference with the main frame.

[0165] According to the above configuration, simple installation workability can be achieved. In addition, the generation of abnormal noise caused by contact between the components when the vehicle is running can be suppressed.

[0166] In this case, the backrest frame preferably includes a plate-shaped panel frame arranged behind the seat of the main frame, and a reinforcement recessed portion recessed toward the seat rear is formed in a portion of the panel frame facing the reinforcement bracket in the seat front-rear direction.

[0167] According to the above configuration, in addition to improving the rigidity of the panel frame, it is also possible to ensure ease of installation of the reinforcement bracket.

[0168] (Effects of the Vehicle Seat According to the Second Embodiment)

[0169] According to the vehicle seat according to the second embodiment described below, a vehicle seat can be realized that ensures simple installation operability while improving the installation rigidity of cable components (particularly cable components for securing a child seat) compared to the conventional art. Furthermore, a vehicle seat can be realized that suppresses weight increase and enables the cable components to be installed in a relatively compact configuration.

[0170] According to the vehicle seat according to the second embodiment described below, the cable member's mounting rigidity is improved, and in particular, the cable member's mounting rigidity can be ensured when the seat is subjected to external loads in the front-rear direction or when the seat is subjected to loads caused by sudden starting or stopping.

[0171] According to the vehicle seat according to the second embodiment described below, the mounting rigidity of the mounting bracket with respect to the main frame is improved, and the mounting rigidity of the cable member is also improved.

[0172] According to the vehicle seat of the second embodiment described below, the cable member can be installed in a relatively compact arrangement. In addition, if the vehicle seat has a reclining structure, a stable reclining action of the seat back can be achieved.

[0173] According to the vehicle seat according to the second embodiment described below, the rigidity of the backrest frame can be improved. In particular, when a relatively large load is applied to the seat in the front-rear direction, the frame-shaped main frame formed of the pipe member can be prevented from being twisted.

[0174] According to the vehicle seat according to the second embodiment described below, weight reduction, cost reduction, and sharing of components can be achieved.

[0175] According to the vehicle seat according to the second embodiment described below, simple installation workability can be achieved and the generation of abnormal noise caused by contact between components during vehicle travel can be suppressed.

[0176] Below, refer to Figures 17-23 A second embodiment of the present invention will be described.

[0177] The second embodiment is an invention related to a vehicle seat, which is a vehicle seat including a backrest frame, a mounting bracket and a cable component, wherein the backrest frame serves as the skeleton of the backrest portion; the mounting bracket is arranged on the outer side surface of the backrest frame in the seat width direction and is mounted on the lower end portion of the backrest frame; the cable component is mounted on the lower end portion of the backrest frame and the mounting bracket, and is characterized in that the cable component has an inner end portion arranged on the inner side in the seat width direction and mounted along the outer side of the lower end of the backrest frame, and an outer end portion arranged on the outer side in the seat width direction and mounted on the outer side surface of the mounting bracket in the seat width direction.

[0178] Furthermore, with respect to the seat back of a vehicle seat, the side on which a seat occupant sits is the front side.

[0179] The vehicle seat S100 according to the second embodiment is, for example, a rear seat corresponding to rear seats of a vehicle.

[0180] The vehicle seat S100 is mainly composed of a seat body, a support leg 130, a support base 140 and a switching device 150. Figure 17 As shown, the seat body includes a seat back 101, a seat cushion 102, and a headrest 103; Figure 18 As shown, the support foot 130 is installed between the seat body and the vehicle body floor and supports the seat cushion 102; the support base 140 rotatably supports the seat back 101; the switching device 150 is installed on the outer part of the seat back 101 in the seat width direction and is used to switch the seat body from the use state to the storage state.

[0181] In addition, if Figure 18 、 Figure 19 As shown, the vehicle seat S100 includes a cable member 160 that is attached to a lower end portion of a seat back 101 and serves as an anchor for connecting a child seat.

[0182] A storage floor (not shown) having a concave shape formed at a position lower than the vehicle floor is provided on the front side of the vehicle seat S100 .

[0183] The vehicle seat S100 is a seat that can be configured in at least two states: a use state in which a passenger can sit and a storage state in which the seat body is stored in a storage floor.

[0184] Specifically, the passenger pulls Figure 17 When the operating lever 151 is shown, the seat body is tilted forward and folded, and the vehicle seat S100 is switched from the use state to the storage state stored in the storage floor. In addition, the passenger manually pulls up the seat body to return to the use state from the storage state.

[0185] like Figure 17As shown, the seat back 101 is a backrest that supports the passenger's back from the rear. Figure 18 The backrest frame 110 as a skeleton shown is configured to place the cushion pad 101 a thereon and be covered with a skin 101 b .

[0186] The seat cushion 102 is a seat portion that supports the passenger from below. Figure 2 The cushion frame 120 shown is configured to place the cushion pad 102 a thereon and cover the surface skin 2 b on the cushion pad 102 a .

[0187] The headrest 103 supports the head of the passenger from behind, and is configured by placing a cushion pad 103 a on a headrest pillar (not shown) serving as a core material and covering the cushion pad 103 a with a cover 103 b .

[0188] The backrest frame 110 is composed of a substantially rectangular frame body serving as a framework of the seat back 101. Figure 18 As shown, it is mainly composed of a main frame 111, a connecting frame 112 and a panel frame 113. The main frame 111 is made of pipe material into a frame shape; the connecting frame 112 is connected and arranged in the frame of the main frame and constitutes the upper frame part 111a of the upper part of the main frame 111 and the lower frame part 111b of the lower part; the panel frame 113 is a roughly integral plate-shaped frame installed behind the seat of the main frame 111 and the connecting frame 112.

[0189] Furthermore, a retractor bracket 114 is mounted approximately in the center of the panel frame 113, sandwiching the connecting frame 112 therebetween in the seat front-rear direction. The retractor bracket 114 is a bracket for mounting a seatbelt retractor (not shown) that winds up the seatbelt, and also serves as a reinforcement bracket.

[0190] A plurality of substantially flat surfaces are formed at predetermined intervals in the seat width direction on the front face of the upper frame portion 111a of the main frame 111. A pair of headrest guides 103c for supporting headrest pillars (not shown) are mounted on the portions forming these substantially flat surfaces.

[0191] The surface suspension cable 115 is mounted by welding to the lower end of the lower frame portion 111 b of the main frame 111 . The pair of cable members 160 are welded together at positions that do not overlap with the distal ends of the pair of surface suspension cables 115 .

[0192] Specifically, the cable member 160 on the left side of the seat is arranged on the outside of the seat width direction relative to the cover suspension cable 115 on the left side of the seat, and the cable member 160 on the right side of the seat is arranged between the two end portions of the cover suspension cable 115 on the right side of the seat.

[0193] A reinforcement bracket 116 connecting the lower end of the side frame portion 111 c and the left end of the lower frame portion 111 b is mounted within the main frame 111 by welding.

[0194] In the main frame 111, on the outer side surfaces of the left and right side frame parts 111c and 111d, as shown in FIG. Figure 18 、 Figure 19 As shown, the left and right mounting brackets 117 for connecting to the support base 140 are mounted on the lower portion. In addition, a switching device 150 for switching the seat body from the use state to the storage state is mounted on the upper portion of the outer side surface of the side frame portion 111c.

[0195] like Figure 18 As shown, the connecting frame 112 is composed of an elongated pipe member, and its upper and lower end portions are formed with substantially flat surfaces that are partially pressed by stamping. These substantially flat surfaces are mounted on the outer surface of the main frame 111 by welding.

[0196] Furthermore, the connecting frame 112 is attached to the right side portion in the seat width direction, which is opposite to the left side portion to which the reinforcing bracket 116 is attached. Therefore, the rigidity of the back frame 110 is improved in a balanced manner in the seat width direction.

[0197] The panel frame 113 is a substantially rectangular panel member, and is mounted to the upper, lower, left, and right frame portions of the main frame 111 by welding. The upper and lower portions of the panel frame 113 are also mounted to the connecting frame 112 by welding.

[0198] In detail, Figure 19 As shown, a frame mounting protrusion 113a (not shown) protruding toward the main frame 111 is formed at a specific position of the panel frame 113 where it overlaps the main frame 111 in the seat front-rear direction. The frame mounting protrusion 113a is welded to each frame while in contact therewith.

[0199] The lower end portion of the panel frame 113 extends downward from the lower frame portion 111 b and is provided so as to cover the surface suspension cable 115 and the cable member 160 from behind.

[0200] Specifically, the lower end portion of the panel frame 113 is bent and extends toward the front of the seat, covering the skin suspension cable 115 and the cable member 160 from behind and below.

[0201] Therefore, when a load is applied from the outside in the seat width direction, even if a load is also applied from below, the assembly rigidity of these components can be ensured.

[0202] like Figure 19 、 Figure 23As shown, a reinforcement recess 113 b is formed in the lower portion of the panel frame 113 at a portion facing the reinforcement bracket 116 in the seat front-rear direction. The reinforcement recess 113 b is recessed toward the rear of the seat.

[0203] like Figure 19 As shown, the reinforcing recess 113b has the same width as the reinforcing bracket 116 and extends in the extending direction of the reinforcing bracket 116. Specifically, its outer end in the seat width direction extends to a position facing the rear surface of the side frame portion 111c, and its inner end extends to a position facing the rear surface of the lower frame portion 111b.

[0204] Therefore, in addition to improving the rigidity of the panel frame 113, the gap is formed, thereby ensuring the installation workability of the reinforcement bracket 116. In addition, the generation of abnormal noise caused by the contact between the various components during vehicle driving can be suppressed.

[0205] like Figure 18 、 Figure 19 As shown, the surface suspension cable 115 is a cable used to suspend the surface end portion of the seat cushion 102 or the seat back 101, and is mainly composed of a cable main body 115a extending in the seat width direction, a pair of cable extensions 115b that are continuous and bent from the left and right ends of the cable main body 115a and extend upward, and a pair of cable end portions 115c that are continuous and bent from the upper ends of the pair of cable extensions 115b and extend inward in the seat width direction.

[0206] A substantially central portion of the cable main body 115 a is welded to the lower end portion of the panel frame 113 , and a pair of cable terminal portions 115 c are welded to the bottom surface of the lower frame portion 111 b .

[0207] The pair of cable terminal portions 115 c are arranged at positions corresponding to the portion of the lower frame portion 111 b to which the reinforcement bracket 116 is attached in the seat width direction, in other words, at positions where the cable terminal portions 115 c overlap with each other in the vertical direction.

[0208] According to the above configuration, the assembly rigidity of the surface suspension cable 115 is improved.

[0209] like Figures 19-22 As shown, the reinforcement bracket 116 is a bracket for reinforcing the backrest frame 110, has a substantially U-shaped cross section, extends in an inclined direction relative to the extending direction (vertical direction) of the connecting frame 112, and connects the side frame portion 111c and the lower frame portion 111b.

[0210] In detail, the reinforcing bracket 116 is mainly composed of a side wall portion 116a arranged inside the frame-shaped main frame 111, a front wall portion 116b that is continuous and bent from the front end portion in the width direction of the side wall portion 116a, and a portion of which extends to the front of the main frame 111, and a rear wall portion 116c that is continuous and bent from the rear end portion in the width direction of the side wall portion 116a, and is opposite to the front wall portion 116b and extends to the back of the main frame 111.

[0211] Furthermore, the outer ends of the front wall portion 116b and the rear wall portion 116c in the seat width direction are joined to the main frame 111 (side frame portion 111c) by welding, and the inner ends of the front wall portion 116b and the rear wall portion 116c are joined to the main frame 111 (lower frame portion 111b) by welding.

[0212] like Figure 19 As shown, cutouts 116 d are formed at both ends of the side wall portion 116 a of the reinforcing bracket 116 close to the main frame 111 to avoid interference with the main frame 111 .

[0213] In other words, the front wall portion 116b and the rear wall portion 116c extend so as to protrude a portion further than the side wall portion 116a and abut against the outer surface of the main frame 111. These abutting portions are joined to form welding marks.

[0214] As described above, the two end portions of the reinforcing bracket 116 in the seat width direction are assembled so as to sandwich the main frame 111, and the two end portions are welded together on both sides of the seat front-back direction. Therefore, the rigidity of the portion where the reinforcing bracket 116 is assembled and the surrounding portion is improved.

[0215] Furthermore, a stepped portion 116e that curves rearward in the seat front-rear direction is formed around the end portion (more specifically, near the portion) of the front wall portion 116b attached to the lower frame portion 111b.

[0216] In other words, when the front wall portion 116b is divided into an upper portion and a lower portion by the stepped uneven portion 116e, the upper portion is recessed rearward relative to the lower portion.

[0217] According to the above configuration, when the seat occupant sits down, the frame portion of the reinforcement bracket 116 is shaped so as not to come into contact with the seat occupant's waist or the area around the waist, thereby improving the seat occupant's seating feeling and riding comfort.

[0218] like Figures 19-22As shown, the mounting bracket 117 is composed of a sheet metal component extending in the vertical direction, and forms a roughly bow shape when viewed from the side of the seat. The upper part of the mounting bracket 117 is mounted on the outer side surface of the main frame 111 in the seat width direction, and its lower end portion is mounted on the inner side surface of the support base 140.

[0219] In detail, Figure 21 As shown, the mounting bracket 117 has a substantially U-shaped cross section and is mainly composed of a side wall portion 117a arranged on the outer side surface of the main frame 111 in the seat width direction, a front wall portion 117b that is continuous and bent from the front end portion in the width direction of the side wall portion 117a and extends toward the front of the main frame 111, and a rear wall portion 117c that is continuous and bent from the rear end portion in the width direction of the side wall portion 117a and extends toward the rear of the main frame 111 while being opposite to the front wall portion 117b.

[0220] The side wall portion 117a extends vertically along the main frame 111, and its lower end portion is rotatably mounted relative to the support base 140. Furthermore, the inner end portions of the front wall portion 117b and the rear wall portion 117c in the seat width direction are welded to the main frame 111 (the side frame portions 111c and 111d).

[0221] The mounting bracket 117 is mounted between an upper portion thereof facing the main frame 111 in the vertical direction and a lower end portion thereof mounted on the support base 140. Figure 20 、 Figure 21 As shown, a bent portion 117d is formed along the shape of the main frame 111 and bent inward in the seat width direction.

[0222] That is, a gap (space) is formed between the portion of the mounting bracket 117 where the bent portion 117 d is formed and the component part disposed further outward in the seat width direction than the mounting bracket 117 .

[0223] Therefore, in addition to improving the mounting rigidity of the mounting bracket 117 relative to the main frame 111 , the assembling workability of the mounting bracket 110 relative to the support base 140 can also be improved.

[0224] In the mounting bracket 117, the portion opposite to the outer end portion in the seat width direction of the reinforcement bracket 116 is formed. Figure 21 As shown, a cutout portion 117e is formed to avoid interference with the reinforcing bracket 116.

[0225] In other words, the front wall portion 117b and the rear wall portion 117c cover the main frame 111 while avoiding the portion facing the outer end portion of the reinforcing bracket 116 and partially extend inward in the seat width direction. The extended portions are joined to form welding marks.

[0226] Therefore, in addition to improving the assembling workability and welding workability of the reinforcing bracket 116 and the mounting bracket 117 , the rigidity of the portion where these components are assembled and the surrounding portion is also improved.

[0227] like Figure 20 As shown, the upper end portion of the mounting bracket 117 is sandwiched between the back frame 110 (main frame 111 ) and the cushion frame 120 in the seat width direction.

[0228] like Figure 19 、 Figure 20 As shown, a seat rotation shaft 118 is provided at the lower end of the left mounting bracket 117 and is pivotally supported on the support base 140 in the seat width direction. Figure 18 As shown, a tilting device 119 is mounted on the lower end portion of the right mounting bracket 117 and is rotatably connected to the support base 140 .

[0229] The tilting device 119 is composed of well-known devices, such as Figure 18 As shown, it is mounted on the outer side surface in the seat width direction of the right mounting bracket 117.

[0230] The reclining device 119 includes a coil spring (not shown) that rotates the back frame 110 forward about the seat rotation shaft 118 and urges the back frame 110 toward the retracted state.

[0231] One end of the coil spring is locked to the back frame 110 side, and the other end is locked to the support base 140 side.

[0232] The reclining device 119 is actuated by releasing the locked state of the seat back 101 through operation of the operating lever 151 , and can rotate the back frame 110 forward and fold it toward the vehicle floor by the biasing force of the coil spring.

[0233] The cushion frame 120 is composed of a substantially rectangular frame-shaped body serving as a skeleton of the seat cushion 102. Figure 18 As shown, it is mainly composed of left and right side frames 121 arranged on the left and right sides, a front connecting pipe 122 connecting the front parts of each side frame 121, a central connecting pipe 123 connecting the roughly central parts of the front and rear directions of each side frame, and a disc frame 124 serving as a plate-shaped frame connecting the front connecting pipe 122 and the central connecting pipe 123.

[0234] The side frame 121 is formed of a sheet metal member having a substantially U-shaped cross section extending in the seat front-rear direction. Its front portion is connected to the front connecting pipe 122 , and its rear portion is mounted to the outer side surface of the main frame 111 via a mounting bracket 117 .

[0235] Furthermore, a cushion rotating device 126 is attached to the rear end portion of the left side frame 121 . The cushion rotating device 126 connects the back frame 110 and the cushion frame 120 rotatably about a cushion rotating shaft 127 .

[0236] like Figure 18 As shown, the front connecting pipe 122 is composed of a substantially U-shaped pipe member, and a foot rotating device 128 is installed on its inner side in the seat width direction. The foot rotating device 128 rotatably connects the cushion frame 120 and the support leg 130 around the foot rotating shaft 129.

[0237] like Figure 18 As shown, the support leg 130 is a substantially U-shaped pipe member that supports the seat cushion 102 and includes leg main bodies 131 disposed on the left and right sides and a leg connecting portion 132 that connects the lower ends of the leg main bodies 131 .

[0238] The upper end of the foot main body 131 is connected to the center portion of the seat in the front-rear direction on the left and right inner sides of the cushion frame 120. In addition, the center portion of the foot connecting portion 132 in the seat width direction is detachably held by a foot holding member (not shown) located on the vehicle body floor.

[0239] The upper end of the support leg 130 protrudes further forward of the seat than the lower end of the support leg 130 , and is inclined forward and upward from the lower end of the support leg 130 toward the upper end of the support leg 130 .

[0240] The support base 140 is a component that supports the seat back 101. Figure 18 、 Figure 19 As shown, it is composed of a substantially L-shaped sheet metal member elongated in the front-to-back direction, is arranged on the side in the seat width direction, and is connected to the vehicle body floor.

[0241] The support base 140 is mainly composed of a connecting wall portion 141 connected to the vehicle body floor, and an outer wall portion 142 that bends and extends upward from the left and right outer ends of the connecting wall portion 141 and is connected to the lower end portion of the mounting bracket 117 through the seat rotation shaft 118.

[0242] The switching device 150 is composed of a well-known device for switching the vehicle seat S100 from the use state to the storage state, such as Figure 17 、 Figure 18 As shown, it is mounted on the upper portion of the backrest frame 110 .

[0243] The switching device 150 includes an engaging hook detachably provided on an engaging striker (not shown) which is a part of the vehicle body member; and an operating lever 151 for moving the front end of the engaging hook in the seat vertical direction and engaging with the engaging striker.

[0244] The engaging hook is connected to the operating rod 151 via a cable (not shown), and the operating rod 151 allows the engaging hook to be switched between a lockable state in which it is locked to the engaging striker and an unlocked state in which it cannot be locked.

[0245] When the passenger operates the operating lever 151, the vehicle seat S100 is released from the locked state of the backrest frame 110 via the switching device 150. With the seat back 101 being released from the locked state, the reclining device 119 is activated. Specifically, the backrest frame 110 is rotated forward and folded by the biasing force of a coil spring (not shown).

[0246] In addition, as the backrest frame 110 rotates, the cushion rotating device 126 and the leg rotating device 128 respectively operate. Specifically, the support leg 130 can be rotated and folded toward the cushion frame 120 side around the leg rotating shaft 129 by the biasing force of the coil spring (not shown).

[0247] Through the above series of operations, the seat body is stored in the storage floor, and the vehicle seat S100 is switched from the use state to the storage state.

[0248] In addition, if the vehicle seat S100 is to be restored from the storage state to the use state, the passenger makes the seat body resist the force of the coil spring (not shown) and lifts it up with his hands, so that the engaging hook of the switching device 150 engages with the engaging striker, and the backrest frame 110 is switched to the locked state.

[0249] The cable component 160 is an anchor bolt for connecting a child seat, such as Figures 19-22 As shown, they are mounted in pairs at the lower end of the main frame 111 with a specific interval in the seat width direction.

[0250] In detail, Figure 21 As shown, the pair of cable components 160 are formed in a roughly U-shape, mainly consisting of a cable main body 161 extending in the seat width direction, an inner end 162 that is continuous and bent from the inner end of the cable main body 161 in the seat width direction and extends toward the rear of the seat, and an outer end 163 that is continuous and bent from the outer end of the cable main body and extends toward the rear of the seat.

[0251] The inner end portion 162 of the left cable member 160 extends toward the rear of the seat along the outer circumference of the lower frame portion 111b and contacts the outer circumference of the lower frame portion 111b.

[0252] The outer end portion 163 extends rearward along the outer side surface of the mounting bracket 117 in the seat width direction and contacts the outer side surface.

[0253] On the other hand, the inner end portion 162 and the outer end portion 163 of the right cable member 160' extend rearward along the outer peripheral surface of the lower frame portion 111b and abut against the outer peripheral surface.

[0254] Hereinafter, the left cable member 160 will be described.

[0255] like Figure 21 As shown, the inner end portion 162 extends in a hook shape so as to cover the bottom surface and the rear surface of the outer peripheral surface of the lower frame portion 111 b , and abuts against and is welded to the bottom surface and the rear surface.

[0256] Therefore, while improving the assembly rigidity of the cable member 160 with respect to the main frame 111 , a balanced structure is formed that takes into account the assembly workability of the cable member.

[0257] The cable main body 161 and the outer end portion 163 extend to cover the front surface and outer side surface of the mounting bracket 117 , and are in contact with and welded to the front surface and outer side surface.

[0258] Therefore, cable member 160 is supported by mounting bracket 117 from the rear to the front of the seat and from the inner side to the outer side in the seat width direction, thereby significantly improving the assembly rigidity of cable member 160. For example, compared with a case where outer end portion 163 is mounted on the inner side of mounting bracket 117, the assembly rigidity of the cable member is greatly improved.

[0259] like Figure 20 As shown, the outer end portion 163 is disposed in the seat width direction so as to provide a gap between the portion of the mounting bracket 117 where the bent portion 117 d is formed and the side frame 121 .

[0260] In other words, the cable member 160 is arranged at a position that does not protrude further than the main frame 111 in the seat width direction, that is, arranged further inward than the outer side surface of the main frame 111 .

[0261] Therefore, in addition to improving the rigidity of the mounting bracket 117 itself and the assembly rigidity of the cable member 160 , interference between the cable member 160 and other components can be suppressed.

[0262] In particular, in the vehicle seat S100 of the present embodiment that can be configured between a use state and a storage state, interference with component parts caused by the rotation of the cushion frame 120 can be avoided, thereby achieving a special effect.

[0263] <Other Implementation Methods>

[0264] In the second embodiment described above, Figure 17As shown, the vehicle seat S100 is formed as a rear seat of a vehicle, but is not particularly limited thereto and may be a front seat of a vehicle or a middle seat in a vehicle having three rows of seats.

[0265] In the above-mentioned second embodiment, the vehicle seat S100 is a seat that can be configured between a use state and a storage state, but is not particularly limited. For example, it can also be a seat that can be configured in three forms: a use state, a storage state, and a flip-up state in which the seat body jumps upward.

[0266] Furthermore, although a storage floor is formed in front of the vehicle seat S100 , this is not particularly limited, and a storage floor may be formed in the rear of the vehicle seat S100 .

[0267] In the second embodiment described above, Figure 18 、 Figure 19 As shown, the support base 140 is directly fixed to the vehicle floor, but is not particularly limited thereto. For example, the support base 140 may be indirectly fixed to the vehicle floor via a rail device that supports the seat body to be movable in the front-rear direction.

[0268] In the second embodiment, the reinforcing bracket 116 or the mounting bracket 117 is mounted on the main frame 111 by welding. However, the welding method is not particularly limited, and various welding methods such as arc welding and spot welding may be used in addition to laser welding.

[0269] In the second embodiment described above, Figure 19 As shown, the upper portion of the mounting bracket 117 is mounted on the backrest frame 110 , and the lower portion thereof is mounted on the support base 140 , but this is not particularly limited and may be modified.

[0270] For example, the lower portion of the mounting bracket 117 may be mounted to the cushion frame 120 or to a guide rail arrangement configured in another manner.

[0271] In the second embodiment described above, Figure 21 As shown, the inner end portion 162 of the cable member 160 extends along the outer peripheral surface of the lower frame portion 111 b and is attached, but this is not particularly limited. For example, it may extend through the lower frame portion 111 b and be attached by welding.

[0272] Similarly, the outer end portion 163 can be mounted by welding by extending the mounting bracket 117 through the seat width direction.

[0273] In the second embodiment, a stowable vehicle seat for use in a car is described as a specific example, but the invention is not limited thereto and can be used as a seat for passengers in airplanes, ships, and the like, in addition to vehicle seats in trains and buses.

[0274] In the second embodiment, the vehicle seat S100 according to the present invention has been mainly described.

[0275] However, the second embodiment described above is only an example for making the present invention easy to understand and is not intended to limit the present invention. That is, the present invention does not depart from its purport, and while changing and improving, it is undoubted that the present invention includes its equivalents.

[0276] In particular, the shapes, arrangements, and configurations of the backrest frame 110 , the reinforcement bracket 116 , the mounting bracket 117 , and the cable member 160 described in the above embodiment are merely examples and do not limit the present invention.

[0277] <Vehicle Seat According to Third Embodiment>

[0278] Next, a vehicle seat according to a third embodiment will be described. When describing the vehicle seat according to the third embodiment, issues related to the vehicle seat will be described.

[0279] Conventionally, there is known a vehicle seat in which a belt guide for guiding a seat belt is attached to the upper end of a back frame serving as a framework of a seat back.

[0280] For example, a rear seat for a vehicle has been proposed, in which a seat belt retractor for winding a seat belt is mounted in the center portion of a backrest frame, and the seat belt pulled out from the seat belt retractor is guided by a seat belt guide (for example, Japanese Patent Application Publication No. 2017-226376 and International Publication No. 2016 / 016924).

[0281] The passenger seat disclosed in Japanese Patent Application Publication No. 2017-226376 includes a backrest frame composed of a frame-shaped main frame made of pipe material, a connecting frame connecting the upper end and the lower end within the frame of the main frame, and a plate-shaped panel frame attached to the entire rear surface of these frames.

[0282] Furthermore, a mounting bracket for mounting the seatbelt retractor is fastened to a central portion of the panel frame and is engaged with the connecting frame, thereby ensuring the assembly rigidity of the seatbelt retractor.

[0283] The passenger seat disclosed in International Publication No. 2016 / 016924 includes a backrest frame composed of a frame-shaped main frame made of a pipe, elastic cables connecting the upper and lower ends within the main frame, and elastic cables connecting the left and right ends in the seat width direction.

[0284] Furthermore, the mounting bracket for mounting the seatbelt retractor is mounted on the elastic cables extending vertically within the main frame and the elastic cables extending in the seat width direction, thereby ensuring lightweight seat frame and good support for passengers.

[0285] (Problems to be Solved by the Vehicle Seat According to the Third Embodiment)

[0286] However, a vehicle seat equipped with a seatbelt retractor such as disclosed in Japanese Patent Application Laid-Open No. 2017-226376 and International Publication No. 2016 / 016924 requires a structure that improves the assembly rigidity of the seatbelt retractor as disclosed in Patent Document 1 while also taking into account lightweighting of the seat frame and support for the seated occupant as disclosed in Patent Document 2.

[0287] Furthermore, in addition to the above, a method of assembling the frame with a simple structure is required.

[0288] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a vehicle seat that can improve the assembly rigidity of a seat belt retractor in a vehicle seat equipped with a seat belt retractor while ensuring a lightweight seat frame and good support for the seated person.

[0289] Another object of the present invention is to provide a vehicle seat whose frame can be assembled with a simple structure.

[0290] The above-mentioned problem is solved by the following method. According to the third embodiment described below, the passenger seat is a vehicle seat having a main frame, a connecting frame, and an elastic support member. The main frame constitutes the skeleton of the backrest and is composed of a frame-shaped body. The connecting frame is arranged in the frame of the main frame and is connected to the upper frame portion constituting the upper portion of the main frame and the lower frame portion constituting the lower portion. The elastic support member is arranged in the frame of the main frame and is connected to the left and right side frame portions constituting the side portions in the seat width direction of the main frame and is used to support the seated person. The vehicle seat is provided with a panel bracket and a mounting bracket. The panel bracket is respectively mounted on the upper frame portion of the main frame, the connecting frame, and the elastic support member. The mounting bracket is mounted in front of the panel bracket in order to mount a seatbelt retractor for winding the seatbelt. The mounting bracket is arranged in the front-rear direction of the seat so as to sandwich the connecting frame between the panel bracket and the panel bracket.

[0291] As described above, since the panel bracket is attached to the upper frame portion of the main frame, the connecting frame, and the elastic support member, the assembly rigidity of the panel bracket is ensured. Furthermore, since the mounting bracket for mounting the seatbelt retractor is mounted in front of the panel bracket and arranged so as to sandwich the connecting frame between the panel bracket and the mounting bracket, the assembly rigidity of the seatbelt retractor can be improved.

[0292] In addition, since the vehicle seat has elastic support members connected to the side portions of the main frame in the seat width direction within the frame of the main frame and used to support the seated person, it is possible to ensure a lightweight seat frame and good support for the seated person compared to the conventional structure in which a plate-shaped panel frame is installed behind the main frame.

[0293] Therefore, compared with the conventional method, the assembly rigidity of the seatbelt retractor can be improved with a simple structure, while ensuring a lightweight seat frame and good support for the seated occupant.

[0294] At this time, it is preferred that the mounting bracket has a frame mounting recess and a frame mounting end portion, the frame mounting recess being bent and recessed toward the connecting frame in front of the panel bracket in order to be installed along the outside of the connecting frame; the frame mounting end portion being arranged at the end portion on at least one side in the up and down directions relative to the frame mounting recess, and extending toward the connecting frame in order to be installed on the outside of the connecting frame.

[0295] Furthermore, it is preferable that an upper flange and a lower flange extending rearward toward the panel bracket are formed at least at an upper end portion and a lower end portion of an outer peripheral portion of the mounting bracket, respectively.

[0296] According to the above configuration, since the assembly rigidity of the mounting bracket can be improved and the rigidity can be expected to be improved by the U-shaped cross section, the seatbelt retractor can be assembled more stably.

[0297] In this case, it is preferable that the mounting bracket is disposed between the upper frame portion and the elastic supporting member on a side close to the elastic supporting member in the up-down direction.

[0298] As described above, since the mounting bracket is mounted in the space below the elastic support member relative to the upper frame portion in the vertical direction, it is easy to ensure sufficient space for assembling the seatbelt retractor. In addition, since the mounting bracket also functions as a reinforcement bracket, it is possible to increase the assembly rigidity of the elastic support member and ensure good support for the seated occupant.

[0299] In this case, it is preferable that an outer peripheral flange extending toward the front of the seat and a notch portion formed at at least one corner are formed on an outer peripheral portion of the panel bracket.

[0300] According to the above configuration, a structure is provided that improves the rigidity of the panel bracket while taking into account the ease of assembly between the panel bracket and peripheral components.

[0301] At this time, it is preferred that the panel bracket has a frame mounting protrusion and a bracket mounting protrusion, wherein the frame mounting protrusion is arranged on one end side in the seat width direction and protrudes toward the connecting frame for installation on the outside of the connecting frame; and the bracket mounting protrusion is arranged on the other end side in the seat width direction and protrudes toward the mounting bracket for installation.

[0302] According to the above configuration, the assembly rigidity of the portion of the panel bracket mounted to the connecting bracket and the portion to which the mounting bracket is mounted is improved, while the generation of noise caused by contact between the other portions and other peripheral components can be suppressed.

[0303] At this time, it is preferred that the panel bracket has a reinforcing recess and a reinforcing protrusion, the reinforcing recess being arranged above the portion on which the mounting bracket is mounted and being recessed toward the side opposite to the mounting bracket; the reinforcing protrusion protruding toward the mounting bracket within the area where the reinforcing recess is formed, and the reinforcing protrusion being formed at a position opposite to the seat belt extending from the seat belt retractor.

[0304] In addition, it is preferred that a safety guide composed of a cable component and used to guide the seat belt is installed in the portion of the upper frame portion that overlaps with the panel bracket position in the seat width direction, and the reinforcing protrusion is arranged between the two end portions where the seat belt is installed in the seat width direction.

[0305] According to the above configuration, the rigidity of the panel bracket can be increased, and the seat belt can be stably pulled out from the seat belt retractor.

[0306] In this case, it is preferable that a support member connecting portion for connecting to the elastic support member is provided at a portion of the panel bracket between the mounting bracket and the lower end of the panel bracket in the vertical direction.

[0307] According to the above configuration, the elastic support member can ensure good support for the seated person, and the elastic support member can also improve the assembly rigidity of the panel bracket.

[0308] At this time, it is preferred that the main frame is made of a pipe, and a plurality of paired headrest guides for supporting headrest pillars are installed on a portion forming a roughly flat surface in front of or behind the upper frame portion, and the panel bracket is installed in the upper frame portion in a manner sandwiched between the plurality of headrest pillar guides in the seat width direction.

[0309] According to the above configuration, since the headrest pillars serving as the core material of the headrest can be well supported, the riding comfort of the seated person can be improved. In addition, the assembly rigidity of the panel bracket relative to the upper frame portion can be further improved.

[0310] (Effects of the Vehicle Seat According to the Third Embodiment)

[0311] According to the vehicle seat according to the third embodiment described below, the assembly rigidity of the seatbelt retractor can be improved with a simple structure compared to the conventional ones, thereby achieving a vehicle seat that ensures a lightweight seat frame and good support for the seated occupant.

[0312] According to the vehicle seat according to the third embodiment described below, based on the above invention, the assembly rigidity of the mounting bracket is improved, and the seatbelt retractor can be assembled more stably.

[0313] According to the vehicle seat according to the third embodiment described below, it is easy to secure an assembly space for the seatbelt retractor, and it is possible to increase the assembly rigidity of the elastic supporting member and ensure good support for the seated person.

[0314] According to the vehicle seat according to the third embodiment described below, a structure is constructed that improves the rigidity of the panel bracket while taking into account the ease of assembly between the panel bracket and peripheral accessories.

[0315] According to the vehicle seat according to the third embodiment described below, the assembly rigidity of the portion of the panel bracket mounted to the connecting bracket and the portion to which the mounting bracket is mounted is improved, while the generation of noise caused by contact between other portions and other peripheral parts can be suppressed.

[0316] According to the vehicle seat according to the third embodiment described below, the rigidity of the panel bracket can be increased, and the seat belt can be stably pulled out from the seat belt retractor.

[0317] According to the vehicle seat according to the third embodiment described below, good support for the seated occupant is ensured while improving the assembly rigidity of the panel bracket.

[0318] According to the vehicle seat according to the third embodiment described below, the riding comfort of the seated person can be improved, and the assembly rigidity of the panel bracket can be further increased.

[0319] Below, refer to Figure 24-29 A third embodiment of the present invention will be described.

[0320] The present embodiment is an invention related to a vehicle seat, which is a vehicle seat equipped with a main frame, a connecting frame and an elastic support component, the main frame constituting the skeleton of the backrest and being composed of a pipe; the connecting frame is arranged in the frame of the main frame and connects the upper frame part and the lower frame part of the main frame; the elastic support component is arranged in the frame of the main frame and connects the left and right side frame parts of the main frame in the seat width direction, and is used to support the seated person, and is characterized in that: it is provided with a panel bracket and a mounting bracket, the panel bracket is respectively mounted on the upper frame part, the connecting frame and the elastic support component; the mounting bracket is mounted in front of the panel bracket for installing the seat belt retractor and is arranged in a manner that clamps the connecting frame between the panel bracket and the seat in the front-rear direction.

[0321] Furthermore, with respect to the seat back of a vehicle seat, the side on which a seat occupant sits is the front side.

[0322] The vehicle seat S200 according to the third embodiment is, for example, a rear seat corresponding to a rear seat of a vehicle.

[0323] like Figure 24 As shown, the vehicle seat S200 is mainly composed of a seat body, a seat belt device 204, a support leg 230, a support base 240 and a switching device 250. Figure 24 As shown, the seat body includes a seat back 201, a seat cushion 202 and a headrest 203; the seat belt device 204 is installed inside the seat back 201 and is used to restrain the upper body of the seated person; Figure 25 As shown, the support foot 230 is installed between the seat cushion 202 and the vehicle body floor and supports the seat cushion 202; the support base 240 rotatably supports the seat back 201; the switching device 250 is installed on the outer part of the seat back 201 in the seat width direction and is used to switch the seat body from the use state to the storage state.

[0324] A concave storage floor (not shown) formed at a position lower than the vehicle floor is provided on the front side of the vehicle seat S200 .

[0325] The vehicle seat S200 is a seat capable of being arranged in at least two seat configurations: a use state in which a passenger can sit, and a storage state in which the seat body is stored in a storage floor.

[0326] Specifically, passengers pull Figure 24 With the operating lever 252 shown, the seat body falls forward and folds, and the vehicle seat S200 is switched from the use state to the stowed state stored in the stowed floor. In addition, the passenger manually pulls up the seat body and returns to the use state from the stowed state.

[0327] like Figure 24As shown, the seat back 201 is a backrest that supports the passenger's back from the rear. Figure 25 The backrest frame 210 as a skeleton shown is configured to place a cushion pad 201 a thereon and to be covered with a skin 201 b .

[0328] The seat cushion 202 is a seat portion that supports the passenger from below. Figure 25 The cushion frame 220 shown is configured to place the cushion pad 202a thereon and to cover the cushion pad 202a with a skin 202b.

[0329] The headrest 203 supports the head of the passenger from behind, and is configured by placing a cushion pad 203 a on a headrest pillar (not shown) serving as a core material and covering the cushion pad 203 b with a cover.

[0330] The seat belt device 204 is mainly composed of a seat belt 204a, a seat belt retractor 204b and a seat belt guide 204c. Figure 24 As shown, the seat belt 204a restrains the upper body of the seated person; the seat belt retractor 204b is mounted on the backrest frame 210 and is capable of pulling out and reeling the seat belt 204a; Figure 25 As shown, the belt guide 204 c is mounted on the seatback frame 210 at a position above the belt retractor 204 b and is used to guide the seat belt 204 a pulled out from the belt retractor 204 b.

[0331] Furthermore, a belt tongue (not shown) is attached to the distal end of the seat belt 204 a , and the belt tongue is detachably connected to a belt buckle (not shown).

[0332] The backrest frame 210 is composed of a substantially rectangular frame body serving as a skeleton of the seat back 201. Figure 25 As shown, it is mainly composed of a main frame 211, a connecting frame 212 and an elastic support component 213. The main frame 211 is made of pipe material in a frame shape; the connecting frame 212 is arranged in the frame of the main frame 211 and is connected to form the upper frame part 211a of the upper part of the main frame 211 and the lower frame part 211b of the lower part; the elastic support component 213 is connected to the left and right side frame parts 211c and 211d of the side part of the main frame 211 and is used to support the seated person.

[0333] In addition, a panel bracket 214 and a mounting bracket 215 are provided on the upper part of the main frame 211. The panel bracket 214 is respectively mounted on the upper frame portion 211a, the connecting frame 212 and the elastic support component 213; the mounting bracket 215 is mounted in front of the panel bracket 214 and is used to install the seat belt retractor 224b.

[0334] A plurality of substantially flat surfaces spaced at predetermined intervals in the seat width direction are formed on the front surface of the upper frame portion 211a of the main frame 211. A pair of headrest guides 203c for supporting headrest pillars (not shown) are attached to the portions forming these substantially flat surfaces.

[0335] A reinforcement bracket 216 connecting the lower end of the side frame portion 211 c and the left end of the lower frame portion 211 b is mounted within the main frame 211 by welding.

[0336] Left and right vehicle body connection brackets 217 for connection to the support base 240 are mounted on the lower portions of the outer surfaces of the left and right side frame portions 211c and 211d of the main frame 211. Furthermore, a switching device 250 for switching the seat body from the use state to the storage state is mounted on the upper portions of the outer surfaces of the side frame portions 211c.

[0337] like Figures 25-27A As shown in Figures 2 and 3, the connecting frame 212 is constructed from an elongated tube, with partially pressed, roughly flat surfaces formed at its upper and lower ends. These roughly flat surfaces are slightly curved along the outer periphery of the main frame 211 and abut against and are mounted thereto. Specifically, the ends of these roughly flat surfaces in the seat width direction are welded to the front of the main frame 211.

[0338] In addition, if Figure 25 As shown, the connecting frame 212 is attached to the right side portion in the seat width direction opposite to the left side portion where the reinforcing bracket 216 is attached. Therefore, the rigidity of the backrest frame 210 is improved uniformly in the seat width direction.

[0339] like Figures 25-27A As shown in FIG. 2B , the elastic support members 213 are elastic springs for supporting the seat back of the seated person, and are mounted on the left and right side frame portions 211 c and 211 d and are arranged in plurality at predetermined intervals in the vertical direction.

[0340] Specifically, the elastic support member 213 is formed in a substantially U-shape that is elongated in the width direction of the seat. Figure 26 As shown, it is composed of a spring main body 213a extending substantially straight in the seat width direction, and left and right spring end portions 213b and 213c which are continuous and bent from both outer end portions in the seat width direction of the spring main body 213a and extend downward.

[0341] The left and right spring end portions 213b and 213c extend downward along the inner side surfaces of the left and right side frame portions 211c and 211d, respectively, and are laser-welded in contact with the inner side surfaces of the side frame portions 211c and 211d.

[0342] like Figure 27A As shown in FIG. 2B , the spring main body 213 a extends in a direction intersecting the connecting frame 212 (orthogonal direction), and a portion thereof abuts against the rear surface of the connecting frame 212 , and the abutting portion is joined by welding.

[0343] The spring main body 213 a also extends in a direction intersecting the panel bracket 214 , and a portion thereof abuts against the front surface of the lower end portion of the panel bracket 214 , and the abutting portion is laser-bonded.

[0344] As described above, since the elastic support member 213 is assembled to the backrest frame 210 through the left and right side frame parts 211c and 211d, the connecting frame 212 and the panel bracket 214, the assembly rigidity of the elastic support member 213 can be improved, ensuring good support for the seated person.

[0345] The elastic support member 213 is mounted on the left side opposite to the right side of the connecting bracket 212 in the seat width direction. Figure 26 As shown, a substantially V-shaped bent portion 213d is formed that protrudes upward from the spring main body portion 213a.

[0346] In addition, if Figure 25 As shown, the elastic support members 213 arranged at intervals in the vertical direction are respectively formed with bent portions 213d, and the bent portions 213d are arranged at positions overlapping in the seat width direction, that is, at positions facing each other in the vertical direction.

[0347] Therefore, the rigidity of elastic supporting member 213 improves in a balanced manner on the seat width direction, thereby can guarantee the good supportability to the seated person. In addition, when being subjected to load from one side of seat front-back direction, also can effectively absorb this load energy along with the collision of vehicle.

[0348] like Figures 25-27A As shown in FIG. 2B , the panel bracket 214 is a plate-shaped component consisting of a substantially rectangular shape and is used to mount the backrest frame 210. Figure 29 The bracket of the seat belt arrangement 204 shown also serves, in addition, as a bracket for the reinforced backrest frame 210 .

[0349] The upper portion of the panel bracket 214 is attached to a substantially central portion of the upper frame portion 211 a , sandwiched between the plurality of headrest guides 203 c in the seat width direction.

[0350] In detail, Figure 27A As shown in FIG. 2B , the upper end portion of the panel bracket extends along the outer peripheral surface of the upper frame portion 211a from the rear to cover the upper frame portion 211a and abuts against the rear surface of the upper frame portion 211a. The left and right end portions of the abutting portion are joined by laser welding.

[0351] In the panel bracket 214, at a portion above the portion where the mounting bracket 215 is mounted, as shown in FIG. Figure 27A As shown in FIG. 2B , a substantially rectangular reinforcement recess 214 a is formed that is recessed toward the side opposite to the mounting bracket 215 (the seat rear side).

[0352] Furthermore, in the region where the reinforcing recessed portion 214 a is formed, a substantially U-shaped reinforcing protruding portion 214 b is formed that protrudes toward the mounting bracket 215 (the seat front side).

[0353] Therefore, in the region where the reinforcing recessed portion 214 a is formed, a substantially U-shaped recessed portion, a reinforcing convex portion 214 b , and a substantially rectangular convex portion are formed in this order from the outside.

[0354] In the reinforcing recess 214a, both end portions on the outer side of the portion forming the reinforcing protrusion 214b in the seat width direction are as follows: Figure 26 As shown in FIG. 27 , a seat belt guide 204 c composed of a substantially U-shaped cable member is installed.

[0355] Specifically, the two end portions of the seat belt guide 204c in the seat width direction are sandwiched between the upper frame portion 211a and the reinforcing recess 214a in the seat front-rear direction, joined to the upper frame portion 211a by arc welding, and joined to the reinforcing recess 214a by laser welding from the rear of the seat.

[0356] Therefore, the assembly rigidity of the belt guide 204c and the panel bracket 214 is improved. In addition, since the belt guide 204c is positioned relative to the panel bracket 214 in the seat width direction, the assembly workability is improved.

[0357] like Figure 26 、 Figure 27A As shown, the reinforcing protrusion 214b is formed between both end portions of the seat belt guide 204c in the seat width direction and extends in the up-down direction.

[0358] Furthermore, since the protruding height of the reinforcing protrusion 214 b is formed to be smaller than the recessed depth of the reinforcing recess 214 a , the protruding portion of the reinforcing protrusion 214 b is formed to protrude further forward than the panel bracket 214 main body.

[0359] That is, the reinforcing protrusion 214b is arranged at a position facing the seat belt 20a extending from the belt retractor 204b, so that the seat belt 204a is not protruded forward and can be stably supported from behind the seat.

[0360] like Figure 27AAs shown in FIG. 2B , one end portion of the panel bracket 214 in the seat width direction is attached to a substantially central portion of the connecting frame 212 sandwiched between the upper frame portion 211 a and the elastic support member 213 in the vertical direction.

[0361] Specifically, the panel bracket 214 is formed with a frame mounting protrusion 214 c that protrudes forward toward the connecting frame 212 in order to be mounted on the rear surface of the connecting frame 212 .

[0362] A plurality of frame mounting protrusions 214 c are formed at predetermined intervals in the vertical direction, and are in contact with the rear surface of the connecting frame 212 , respectively. The contact portions are joined by laser welding.

[0363] like Figure 27B As shown, a support member connecting portion 214d for connecting the elastic support member 213 is formed at the lower end portion of the panel bracket 214. A plurality of support member connecting portions 214d are formed at predetermined intervals in the seat width direction.

[0364] In addition, if Figure 27A As shown in FIG. 2B , a mounting bracket 215 is mounted on the lower portion of the panel bracket 214 . The mounting bracket 215 is mounted on a portion closer to the center than the portions where the upper frame portion 211 a , the connecting frame 212 , and the elastic support member 213 are mounted.

[0365] Specifically, the panel bracket 214 is formed with a bracket mounting protrusion 214 e that protrudes forward toward the mounting bracket 215 for mounting the mounting bracket 215 .

[0366] like Figure 27B As shown, the bracket mounting protrusion 214e abuts against the rear surface of the mounting bracket 215, and the abutting portion is joined by laser welding.

[0367] The bracket mounting protrusion 214e is disposed in parallel in the vertical direction at substantially the same height position as the frame mounting protrusion 214c, and is disposed between the plurality of support member connecting portions 214d in the seat width direction.

[0368] like Figure 27A As shown in FIG. 2B , an outer peripheral flange 214f extending toward the front of the seat is formed on the outer peripheral portion of the panel bracket 214. In addition, notches 214g are formed at all four corners of the outer peripheral portion.

[0369] Therefore, the rigidity of the panel bracket 214 can be improved, and interference with other components can be avoided.

[0370] like Figures 26-28AAs shown in FIG. 2B , the mounting bracket 215 is a substantially rectangular plate-shaped member that is elongated in the seat width direction and is used to mount the seatbelt retractor 204 b to the back frame 210 . It is also used to reinforce the back frame 210 .

[0371] The left side portion of the mounting bracket 215 in the seat width direction has a substantially flat shape, and is mounted to face the front surface of the panel bracket 214 in the front-rear direction.

[0372] Specifically, the panel bracket 214 (bracket mounting protrusion 214 e ) is mounted on the mounting bracket 215 at a lower portion thereof on the elastic support member 213 side relative to the upper frame portion 214 in the up-down direction.

[0373] like Figure 26 、 Figure 27A As shown, the right side portion of the mounting bracket 215 is formed into a curved shape that curves along the outer peripheral surface of the connecting frame 212 and abuts against the front surface of the connecting frame 212 so as to cover the front surface. The abutting portion is joined by arc welding.

[0374] In detail, in order to be installed along the outer peripheral surface of the connecting frame 212, a frame mounting recess 215a and frame mounting ends 215b and 215c are formed on the right side of the mounting bracket 215. The frame mounting recess 215a is bent toward the connecting frame 212 and recessed at the same time; the frame mounting ends 215b and 215c are arranged at a position higher and lower than the frame mounting recess 215a, and protrude toward the connecting frame 212 respectively.

[0375] Furthermore, the right end portion of the frame mounting recess 215 a , the upper end portion of the frame mounting end portion 215 b , and the lower end portion of the frame mounting end portion 215 c are respectively welded to the connecting frame 212 .

[0376] In the upper end portion, the left end portion and the lower end portion of the outer peripheral portion of the mounting bracket 215, as shown in FIG. Figure 27A 、 Figure 28B As shown, an outer peripheral flange 215d is formed to extend toward the panel bracket 214. The outer peripheral flange 215d abuts against the front face of the panel bracket 214.

[0377] According to the above configuration, the assembly rigidity of the mounting bracket 215 with respect to the panel bracket can be improved, and the rigidity can be expected to be improved by the U-shaped cross section.

[0378] like Figure 27A As shown, in the mounting bracket 215, a retractor assembly portion 215e for assembling the seatbelt retractor 204b is provided in a substantially central portion surrounded by upper and lower peripheral flanges 215d, the frame mounting recess 215a, and a portion mounted on the bracket mounting protrusion 214e.

[0379] As described above, since the seatbelt retractor 204 b is assembled to the central portion of the mounting bracket 215 , particularly where the rigidity is increased, the assembly rigidity of the seatbelt retractor 204 b with respect to the seatback frame 210 can be increased.

[0380] like Figure 29 As shown, the seatbelt retractor 204b is assembled into the retractor assembly portion 215e as a box-shaped unit.

[0381] The seat belt 204a is pulled out from the belt withdrawal hole at the upper end of the seat belt retractor 204b and extends upward from the seat. The extended portion contacts the rear surface of the upper frame portion 211a and is guided toward the front of the seat along the outer circumference of the upper frame portion 211a. The extended portion extending toward the front of the seat contacts the upper surface of the belt guide 204c and is guided toward the bottom of the seat along the outer circumference of the belt guide 204c.

[0382] In the above configuration, the seat belt guide 204c is Figure 27A 、 Figure 29 The reinforcement convex portion 214b shown in the figure appropriately supports and extends upwardly toward the seat. Therefore, the seat belt 204a can be made to have good operability.

[0383] Furthermore, the belt guide 204 c extending above the seat passes through a gap formed between the upper frame portion 211 a and the panel bracket 214 and is guided toward the front of the seat.

[0384] Therefore, the seat belt 204a can be stably arranged in the seat front-rear direction.

[0385] like Figure 25 As shown, the reinforcement bracket 216 is a bracket for reinforcing the backrest frame 210, has a substantially U-shaped cross section, extends in an inclined direction relative to the extending direction (vertical direction) of the connecting frame 212, and connects the side frame portion 211c and the lower frame portion 211b.

[0386] In detail, the reinforcing bracket 216 is composed of a side wall portion arranged inside the frame of the main frame 211, a front wall portion bent from the front end portion in the width direction of the side wall portion and extended to the front of the main frame 211, and a rear wall portion bent from the rear end portion in the width direction of the side wall portion and extended to the rear of the main frame 211.

[0387] Furthermore, outer ends of the front wall portion and the rear wall portion in the seat width direction are joined to the side frame portion 211 c , and inner ends of the front wall portion and the rear wall portion are joined to the lower frame portion 211 b .

[0388] like Figure 25As shown, the vehicle body connecting bracket 217 is composed of a sheet metal component extending in the upward and downward directions. The upper portion of the vehicle body connecting bracket 217 is installed on the outer side surface of the main frame 211 (side frame portion 211c) in the seat width direction, and its lower end portion is installed in a manner that can rotate relative to the inner side surface of the support base 240.

[0389] Specifically, the upper portion of the vehicle body connecting bracket 217 extends in the up-down direction along the outer peripheral surface of the main frame 211 and is joined to the outer peripheral surface by welding.

[0390] like Figure 25 As shown, the upper end portion of the vehicle body connecting bracket 217 is sandwiched between the back frame 210 (main frame 211 ) and the cushion frame 220 in the seat width direction.

[0391] A seat rotation shaft 218 is provided at the lower end of the left body connection bracket 217 and is supported by the support base 240 in the seat width direction. A tilting device 219 is installed at the lower end of the right body connection bracket 217 to connect the backrest frame 210 to the support base 240 in a rotatable manner.

[0392] The tilting device 219 is a well-known device, such as Figure 25 As shown, it is mounted on the outer side surface in the seat width direction of the right vehicle body connecting bracket 217.

[0393] The reclining device 219 includes a coil spring (not shown) that rotates the back frame 210 forward about the seat rotation shaft 218 and urges the backrest frame 210 toward the retracted state.

[0394] One end of the coil spring is locked to the back frame 210 side, and the other end is locked to the support base 240 side.

[0395] The locked state of the seat back 201 is released by the operation of the operating lever 252 , the reclining device 219 is actuated, and the back frame 210 is rotated forward by the biasing force of the coil spring and folded toward the vehicle body floor.

[0396] The cushion frame 220 is composed of a substantially rectangular frame-shaped body serving as a skeleton of the seat cushion 202. Figure 25 As shown, it is mainly composed of left and right side frames 221 arranged on the left and right sides, a front connecting pipe 222 connecting the front parts of each side frame 221, a central connecting pipe 223 connecting the roughly central parts of the front and rear directions of each side frame, and a disc frame 224 serving as a plate-shaped frame connecting the front connecting pipe 222 and the central connecting pipe 223.

[0397] The side frame 221 is composed of a sheet metal component with a substantially U-shaped cross section extending in the seat front-rear direction. Its front portion is connected to the front connecting pipe 222, and its rear portion is attached to the outer side surface of the main frame 211 through the vehicle body connecting bracket 217.

[0398] Furthermore, a cushion rotating device 226 is mounted on the rear end portion of the left side frame 221 . The cushion rotating device 226 rotatably connects the cushion frame 220 to the backrest frame 210 around a cushion rotating shaft 227 .

[0399] like Figure 25 As shown, the front connecting pipe 222 is composed of a roughly U-shaped pipe component, and a foot rotating device 228 is installed on its inner side in the seat width direction. The foot rotating device 228 is connected to the support foot 230 in a rotatable manner relative to the cushion frame 220 with the foot rotating shaft 229 as the center.

[0400] like Figure 25 As shown, the support leg 230 is a substantially U-shaped pipe member that supports the seat cushion 202 and includes leg main bodies 231 disposed on the left and right sides and a leg connecting portion 232 that connects the lower ends of the leg main bodies 231 .

[0401] The upper end of the leg main body 231 is connected to the substantially front-back center portion of the left and right inner sides of the cushion frame 220. The center portion of the leg connecting portion 232 in the seat width direction is detachably held by a foot holding member (not shown) located on the vehicle body floor.

[0402] The upper end of the support leg v30 protrudes further forward of the seat than the lower end of the support leg 230 , and is inclined forward and upward from the lower end of the support leg 230 toward the upper end of the support leg 230 .

[0403] The support base 240 is a component that supports the seat back 201. Figure 25 As shown, it is composed of a substantially L-shaped sheet metal member elongated in the front-to-back direction, is arranged on the side in the seat width direction, and is connected to the vehicle body floor.

[0404] The support base 240 is mainly composed of a connecting wall portion 241 connected to the upper surface of the vehicle body floor, and an outer wall portion that bends and extends upward from the left and right inner ends of the connecting wall portion 241 and is connected to the lower end portion of the vehicle body connecting bracket 217 through the seat rotation shaft 218.

[0405] The switching device 250 is a well-known device for switching the vehicle seat S200 from the use state to the storage state. Figure 24 、 Figure 25 As shown, it is mounted on the upper portion of the backrest frame 210.

[0406] The switching device 250 includes an engagement hook 251 and an operating rod 252. The engagement hook 251 is detachably provided on an engagement striker (not shown) which is part of the vehicle body component. The operating rod 252 moves the top end portion of the engagement hook 251 in the vertical direction of the seat and is used to engage and lock it with the engagement striker.

[0407] The engaging hook 251 is connected to the operating rod 252 via a cable (not shown). The operating rod 252 can switch the engaging hook 251 between a lockable state in which it can be locked with the engaging striker and an unlocked state in which it cannot be locked.

[0408] When the passenger operates the operating lever 252, the vehicle seat S200 is released from the locked state of the backrest frame 210 by the switching device 250 from the use state. Figure 25 The reclining device 219 shown is operated, and specifically, the backrest frame 210 can be rotated and folded forward by the biasing force of a coil spring (not shown).

[0409] In addition, as the backrest frame 210 rotates, Figure 25 The pad rotating device 226 and the leg rotating device 228 shown are respectively operated. Specifically, the support leg 230 can be rotated and folded toward the pad frame 220 around the leg rotating shaft 229 by the biasing force of the coil spring (not shown).

[0410] Through the above series of actions, the seat body is stored in the storage floor, and the vehicle seat S200 is switched from the use state to the storage state.

[0411] In addition, if the vehicle seat S200 is to be restored from the storage state to the use state, the passenger can lift the seat body upward with his hands against the force of the coil spring (not shown), so that the engaging hook 251 of the switching device 250 engages with the engaging striker, thereby switching the backrest frame 210 to the locked state.

[0412] <Other Implementation Methods>

[0413] In the third embodiment, the vehicle seat S200 is formed as a rear seat of a vehicle, but the present invention is not particularly limited thereto and may be a front seat of a vehicle or a center seat in a vehicle having three rows of seats.

[0414] In the third embodiment, the vehicle seat S200 is a seat that can be configured between a use state and a storage state, but this is not particularly limited. For example, it can also be a seat that can be configured in three states: a use state, a storage state, and a flip-up state in which the seat body jumps upward.

[0415] Furthermore, although a storage floor is formed in front of the vehicle seat S200 , this is not particularly limited, and a storage floor may be formed behind the vehicle seat S200 .

[0416] In the third embodiment, Figure 25 As shown, the support base 240 is directly fixed to the vehicle floor, but is not particularly limited thereto. For example, the support base 240 may be indirectly fixed to the vehicle floor via a rail device that supports the seat body so as to be movable in the front-rear direction.

[0417] In the third embodiment described above, laser welding or arc welding is used when assembling the frames or when assembling the frames and brackets. However, this is not particularly limited, and various welding methods such as spot welding may be used.

[0418] In the third embodiment, Figure 25 As shown, the upper portion of the vehicle body connecting bracket 217 is attached to the back frame 210 , and the lower portion thereof is attached to the support base 240 , but this is not particularly limited and may be modified.

[0419] For example, the lower portion of the vehicle body connection bracket 217 may be mounted on the cushion frame 220 or on a guide rail device provided in another manner.

[0420] The third embodiment described above is described using a stowable vehicle seat for an automobile as a specific example, but the invention is not limited thereto and can be used as a seat for passengers in aircraft, ships, and the like, in addition to vehicle seats for trains and buses.

[0421] The third embodiment has been described mainly with respect to the vehicle seat S200 according to the present invention.

[0422] However, the third embodiment is merely an example for making the present invention easy to understand and is not intended to limit the present invention. That is, the present invention does not depart from its purport, and while changing and improving, it is undoubted that the present invention includes its equivalents.

[0423] In particular, the shapes, arrangements, and configurations of the backrest frame 210 , the panel bracket 214 , and the mounting bracket 215 described in the above embodiment are merely examples and do not limit the present invention.

[0424] Explanation of symbols

[0425] S car seat

[0426] S1 Seat Cushion

[0427] S11 Cushion

[0428] S12 decorative cover

[0429] S2 seat back

[0430] S21 Cushion

[0431] S22 decorative cover

[0432] S3 headrest

[0433] S31 Cushion

[0434] S32 decorative cover

[0435] F, FX seat frame

[0436] 1. 1X seat cushion frame

[0437] 1a Support foot

[0438] 2. 2X seat back frame

[0439] 3-tube frame

[0440] 3a Side frame

[0441] 3b Upper frame

[0442] 3c Lower frame

[0443] 4 Backrest

[0444] W Cable Frame

[0445] 10 Mounting bracket

[0446] 11. Outer side

[0447] 11a Opening

[0448] 11b Mounting hole

[0449] 12 front

[0450] 13 Back

[0451] 13a convex part

[0452] 14 above

[0453] 14a recess (1st recess)

[0454] 14b Slit

[0455] 15 below

[0456] 15a recess (2nd recess)

[0457] 15b slit

[0458] 20, 20X reinforcement bracket

[0459] 21, 21X base

[0460] 21a, 21Xa upper end

[0461] 21b, 21Xb lower end

[0462] 22, 22X front end

[0463] 23, 23X rear end

[0464] 24a, 24Xa reinforcement ribs (upper reinforcement ribs)

[0465] 24b, 24Xb reinforcement ribs (lower side reinforcement ribs)

[0466] 30 locking units

[0467] 31 medial side

[0468] 32 mounting holes

[0469] 33 Cleats

[0470] 40 support brackets

[0471] 41 Lock release part

[0472] 42 front part

[0473] 43 rear

[0474] 50 Cable Components

[0475] 51 1st Extension

[0476] 51a 1st end

[0477] 51b 1st bend

[0478] 52 2nd Extension

[0479] 52a Second end

[0480] 52b Second bend

[0481] 53 Connection

[0482] 60X cover parts

[0483] S100 Car Seat

[0484] 101 Seat Back

[0485] 101a, 102a, 103a cushioning materials

[0486] 101b, 102b, 103b surface materials

[0487] 102 Seat Cushion

[0488] 103 Headrest

[0489] 103c Headrest guide

[0490] 110 Backrest frame

[0491] 111 Main Frame

[0492] 111a Upper frame

[0493] 111b Lower frame

[0494] 111c, 11d side frame parts

[0495] 112 Link Frame

[0496] 113 Panel Frame

[0497] 113a Frame mounting boss

[0498] 113b Reinforced concave portion

[0499] 114 Retractor bracket

[0500] 115 Skin Suspension Cable

[0501] 115a Cable body

[0502] 115b Cable extension

[0503] 115c cable end

[0504] 116 reinforcement bracket

[0505] 116a Side wall

[0506] 116b Front wall

[0507] 116c rear wall

[0508] 116d incision

[0509] 116e Stepped uneven part

[0510] 117 Mounting bracket

[0511] 117a side wall

[0512] 117b front wall

[0513] 117c rear wall

[0514] 117d bend

[0515] 117e incision

[0516] 118 Seat rotation axis

[0517] 119 Tilt device

[0518] 120 Pad Frame

[0519] 121 side frame

[0520] 122 front connecting pipe

[0521] 123 Central connecting pipe

[0522] 124 disc frame

[0523] 126 Pad Rotating Device

[0524] 127 Pad rotating shaft

[0525] 128 foot swivel

[0526] 129 foot rotation axis

[0527] 130 Support feet

[0528] 131 Foot body

[0529] 132 foot connection

[0530] 140 support base

[0531] 141 connecting wall

[0532] 142 outer wall

[0533] 150 Switching device

[0534] 151 operating lever

[0535] 160, 160' cable components

[0536] 161 Cable body

[0537] 162 inner end

[0538] 163 outer end

[0539] S200 Car Seat

[0540] 201 Seat Back

[0541] 201a, 202a, 203a cushioning materials

[0542] 201b, 202b, 203b surface materials

[0543] 202 Seat Cushion

[0544] 203 Headrest

[0545] 203c Headrest guide

[0546] 204 Seat belt assembly

[0547] 204a Seat belts

[0548] 204b Seat belt retractor

[0549] 204c Seat belt guide

[0550] 210 Backrest frame

[0551] 211 Main Frame

[0552] 211a Upper frame

[0553] 211b Lower frame

[0554] 211c, 211d side frame parts

[0555] 212 Link Frame

[0556] 213 elastic support component (elastic spring)

[0557] 213a Spring body

[0558] 213b, 213c spring ends

[0559] 213d bend

[0560] 214 Panel Bracket

[0561] 214a Reinforced concave portion

[0562] 214b Reinforced protrusion

[0563] 214c Frame mounting boss

[0564] 214d Support component connection portion

[0565] 214e bracket mounting boss

[0566] 214f peripheral flange

[0567] 214g cut part

[0568] 215 Mounting bracket

[0569] 215a Frame mounting recess

[0570] 215b, 215c frame mounting ends

[0571] 215d peripheral flange

[0572] 215e Retractor Assembly

[0573] 216 reinforcement bracket

[0574] 217 Body connecting bracket

[0575] 218 seat rotation axis

[0576] 219 tilting device

[0577] 220 Pad Frame

[0578] 221 side frame

[0579] 222 front connecting pipe

[0580] 223 Central connecting pipe

[0581] 224 disc frame

[0582] 226 Pad Rotating Device

[0583] 227 Pad Rotating Shaft

[0584] 228 Foot Rotating Device

[0585] 229 Foot Rotation Axis

[0586] 230 support feet

[0587] 231 Foot body

[0588] 232 foot connection

[0589] 240 support base

[0590] 241 connecting wall

[0591] 242 outer wall

[0592] 250 Switching Device

[0593] 251 Engagement Hook

[0594] 252 joystick

Claims

1. A passenger seat having a seat back that is tiltable relative to a seat cushion, characterized in that: The seat back includes a seat back frame, a locking unit, a lock release member, a support bracket, and a cable member; the locking unit engages with an engaged portion provided on the vehicle body and locks the tilt of the seat back frame; The lock releasing member releases the tilt lock of the seat back frame; The support bracket supports the lock release component; The cable component is mounted on the support bracket; The seat back frame has side frames and mounting brackets; The side frame extends in the vertical direction of the passenger seat; The mounting bracket is mounted on the outer side of the side frame in the width direction of the passenger seat; The locking unit is mounted on an outer side surface of the mounting bracket in the width direction of the vehicle seat; The mounting bracket has a front portion and a rear portion respectively disposed on the front-rear direction of the passenger seat; The side frame is connected to the mounting bracket via a reinforcing bracket provided on the front face of the mounting bracket and a protrusion formed on the rear face of the mounting bracket; One end portion of the cable component is mounted on the outer side surface of the mounting bracket; The other end portion of the cable member is mounted on the seat back frame.

2. The vehicle seat according to claim 1, wherein: The support bracket includes a front portion and a rear portion in the front-rear direction of the vehicle seat; The front portion is mounted on the mounting bracket; The rear portion is mounted on the cable component.

3. The vehicle seat according to claim 1, wherein: The mounting bracket has an upper surface and a lower surface in the vertical direction of the vehicle seat; The top surface has a first recess engaged with the side frame; The bottom surface has a second recess engaged with the side frame; The mounting bracket is mounted on the side frame at the first recess and the second recess.

4. The vehicle seat according to claim 3, wherein: The mounting bracket includes slits on the upper surface and the lower surface.

5. The vehicle seat according to claim 4, characterized in that: The slit is formed in the upper surface so as to extend from a corner portion adjacent to the outer side surface and the rear surface toward the first recessed portion.

6. The vehicle seat according to claim 3, wherein: The first recessed portion and the second recessed portion each have an outer shape that curves from an inner side in a width direction of the vehicle seat toward an outer side.

7. The vehicle seat according to claim 1, wherein: The lock release member is supported on the support bracket in a rotatable manner; By rotating the lock releasing member, the locking unit is disengaged from the engaged portion, and the tilt lock of the seat back frame is released.

Images