Ride vehicle seat

Abstract

In a seat for an occupant having a seatback that is able to incline with respect to a seat cushion, a locking unit that locks the inclination of a seatback frame is installed to a side frame, and an occupant seat that is able to improve the strength of the periphery of the side frame while stably supporting the locking unit is provided. A seat for a vehicle having a seatback that is able to incline with respect to a seat cushion, the seatback having a seatback frame and a locking unit that engages with an engagement portion provided to a vehicle body and locks the inclination of the seatback frame, the seatback frame having a side frame that extends in the up-down direction of the seat for an occupant, a mounting bracket that is mounted to the outside of the seat for an occupant in the width direction of the side frame, the locking unit being mounted to the outside surface of the mounting bracket in the width direction of the seat for an occupant, and the side frame and the mounting bracket being connected by a reinforcing bracket.

Description

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

[0002] The present application relates to a seat for an occupant provided with a seatback capable of tilting with respect to a seat cushion, and particularly to a seat for an occupant provided with a locking unit that engages with an engaged portion provided to a vehicle body and locks the tilting of the seatback. BACKGROUND

[0003] In a seat for a vehicle configured in a manner that a seatback is capable of tilting with respect to a seat cushion in a direction closer to the seat cushion, a technology in which a locking unit is installed to a seatback frame to lock the tilting of the seatback is well known.

[0004] For example, in patent document 1, there is described a seatback frame in which a bracket is provided to a corner portion of a side portion of a frame member formed by bending a pipe into a frame shape, and a lock unit capable of being freely detached is installed to a striker supported by a vehicle body. When a passenger is seated, the lock unit is engaged with the striker, and the bracket and the seatback frame are fixed to the vehicle body.

[0005] Patent document 1: Patent No. 6268294 SUMMARY

[0006] In order to protect a passenger from an impact from the front and the rear of a vehicle, it is necessary to increase the strength of a seat frame, and in the periphery of the lock unit installed to the seat frame by the bracket, a configuration capable of stably supporting the lock unit by increasing the strength is also necessary.

[0007] The present application is made in view of the above-described problems, and aims to provide a seat for an occupant capable of increasing the strength of the periphery of a side frame in which a lock unit is installed in a seatback frame, while stably supporting the lock unit.

[0008] The above-described problems are solved by the following means. A seat for an occupant according to the present application is a seat for an occupant provided with a seatback capable of tilting with respect to a seat cushion, the seatback being provided with a seatback frame and a locking unit that engages with an engaged portion provided to a vehicle body and locks the tilting of the seatback frame, the seatback frame having a side frame extending in a vertical direction of the seat for an occupant, and a mounting bracket mounted to an outer side of the seat for an occupant in a width direction of the seat for an occupant of the side frame, the locking unit being mounted to an outer side surface of the mounting bracket in the width direction of the seat for an occupant, and the side frame and the mounting bracket being connected by a reinforcing bracket.

[0009] In the ride seat according to the present application configured in the above-described manner, the strength of the periphery of the side frame where the locking unit is installed is increased by the reinforcing bracket, and thus the locking unit can be stably supported.

[0010] In the ride seat described above, it is preferable that the mounting bracket have a front face and a rear face in the front-rear direction of the ride seat, the front face and the rear face being connected by the outer face, and the reinforcing bracket connect the side frame and the front face of the mounting bracket.

[0011] In the configuration described above, the locking unit can be further stably supported by appropriately increasing the strength of the mounting bracket.

[0012] In the ride seat described above, it is preferable that the rear face of the mounting bracket have a protrusion protruding toward the front in the front-rear direction of the ride seat, and the mounting bracket be mounted to the side frame on the protrusion.

[0013] In the configuration described above, the locking unit can be further stably supported because the mounting bracket is stably mounted to the side frame.

[0014] In the ride seat described above, it is preferable that the mounting bracket have an opening spanning the rear face and the outer face.

[0015] In the configuration described above, the outer face where the locking unit is installed can be ensured without reducing the rigidity of the mounting bracket, and weight reduction can be achieved.

[0016] In the ride seat described above, it is preferable that the mounting bracket have an upper face and a lower face in the up-down direction of the ride seat, the upper face have a first recess engaging with the side frame, and the lower face have a second recess engaging with the side frame, and the mounting bracket be mounted to the side frame in the first recess and the second recess.

[0017] In the configuration described above, the mounting of the mounting bracket to the side frame can be made more stable in the up-down direction of the seat because the mounting bracket is mounted to the side frame in the first recess of the upper face and the second recess of the lower face.

[0018] In the ride seat described above, it is preferable that the mounting bracket have slits in the upper face and the lower face, respectively.

[0019] In the configuration described above, the upper face and the lower face of the mounting bracket are formed to have slits by bending a plate or the like, and thus the operation of forming the mounting bracket becomes easy.

[0020] In the above-mentioned ride seat, it is preferable that the reinforcing bracket have a front end portion and a rear end portion in the front-rear direction of the ride seat, and that a reinforcing rib be formed so as to extend between the front end portion and the rear end portion.

[0021] In the above-mentioned configuration, the rigidity of the reinforcing bracket can be improved by providing the reinforcing rib.

[0022] In the above-mentioned ride seat, it is preferable that the reinforcing rib have an upper reinforcing rib at an upper end portion of the reinforcing bracket, and a lower reinforcing rib at a lower end portion of the reinforcing bracket, and that the spacing between the upper reinforcing rib and the lower reinforcing rib gradually increase in the front-rear direction of the ride seat.

[0023] In the above-mentioned configuration, since the reinforcing bracket has the upper reinforcing rib and the lower reinforcing rib whose spacing gradually increases in the front-rear direction, the strength against an impact applied in the front-rear direction of the ride seat can be improved.

[0024] In the above-mentioned ride seat, it is preferable that a lock release member, a support bracket, and a cable member be provided, the lock release member releasing the lock of the inclination of the seatback frame; the support bracket supporting the lock release member; and the cable member being attached to the support bracket, one end portion of the cable member being attached to the outer side surface of the mounting bracket, and the other end portion being attached to the seatback frame.

[0025] In the above-mentioned configuration, the lock release member can be fixed with a simple configuration.

[0026] In the above-mentioned ride seat, it is preferable that the support bracket have a front portion and a rear portion in the front-rear direction of the ride seat, the front portion being attached to the mounting bracket, and the rear portion being attached to the cable member.

[0027] In the above-mentioned configuration, the lock release member can be stably fixed.

[0028] According to the ride seat of the present application, the strength of the side frame periphery where the lock unit is attached is improved by the reinforcing bracket, and the lock unit can be stably supported.

[0029] In addition, according to the ride seat of the present application, the lock unit can be further stably supported by appropriately improving the strength of the mounting bracket.

[0030] In addition, according to the ride seat of the present application, the mounting bracket is stably attached to the side frame, and thus the lock unit can be further stably supported.

[0031] Further, the ride seat according to the present application can ensure the outer side of the mounting lock unit while not reducing the rigidity of the mounting bracket, and can achieve weight reduction

[0032] Further, the ride seat according to the present application can make the mounting of the mounting bracket to the side frame more stable in the up-and-down direction of the seat.

[0033] Further, the ride seat according to the present application is configured such that the upper surface and the lower surface of the mounting bracket each have a slit, and the upper surface and the lower surface having the slit can be formed by bending a plate or the like, so that the operation of forming the mounting bracket becomes easy.

[0034] Further, the ride seat according to the present application can improve the rigidity of the mounting bracket by providing the reinforcing ribs.

[0035] Further, the ride seat according to the present application can improve the strength against an impact applied in the front-and-rear direction of the ride seat, because the reinforcing bracket has the upper reinforcing rib and the lower reinforcing rib that gradually expand with the interval from the front to the rear.

[0036] Further, the ride seat according to the present application can fix the lock release member with a simple configuration.

[0037] Further, the ride seat according to the present application can stably fix the lock release member. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 An external view of a vehicle seat according to a first embodiment of the present application.

[0039] Figure 2 An external view of a seat frame of the vehicle seat according to the first embodiment of the present application.

[0040] Figure 3 A partial enlarged view showing a configuration around a lock unit of the seat frame according to the first embodiment of the present application.

[0041] Figure 4 A partial enlarged view showing a configuration around a lock unit of the seat frame according to the first embodiment of the present application.

[0042] Figure 5 An external view of a mounting bracket of the vehicle seat according to the first embodiment of the present application.

[0043] Figure 6 An external view of the mounting bracket of the vehicle seat according to the first embodiment of the present application.

[0044] Figure 7 An appearance view of a mounting bracket of a seat for vehicle according to the first embodiment of the present application.

[0045] Figure 8 An appearance view of a mounting bracket of a seat for vehicle according to the first embodiment of the present application.

[0046] Figure 9 An appearance view of a mounting bracket of a seat for vehicle according to the first embodiment of the present application.

[0047] Figure 10 An appearance view of a mounting bracket of a seat for vehicle according to the first embodiment of the present application.

[0048] Figure 11 An appearance view of a reinforcing bracket of a seat for vehicle according to the first embodiment of the present application.

[0049] Figure 12 An appearance view of a reinforcing bracket of a seat for vehicle according to the first embodiment of the present application.

[0050] Figure 13 A partially exploded view of a seat frame of a seat for vehicle according to the first embodiment of the present application.

[0051] Figure 14 An appearance view of a seat frame of a seat for vehicle according to a modification example of the first embodiment of the present application.

[0052] Figure 15 An appearance view of a reinforcing bracket of a seat for vehicle according to a modification example of the first embodiment of the present application.

[0053] Figure 16 A partially enlarged view of a structure around a locking unit of a seat frame according to a modification example of the first embodiment of the present application.

[0054] Figure 17 An appearance perspective view of a seat for vehicle according to the second embodiment of the present application.

[0055] Figure 18 An appearance perspective view of a seat frame of a seat for vehicle according to the second embodiment of the present application.

[0056] Figure 19 A partially enlarged view of a main part of a perspective view of a seat frame according to the second embodiment of the present application.

[0057] Figure 20 A partially enlarged view of a main part of a front view of a seat frame according to the second embodiment of the present application.

[0058] Figure 21FIG. 2 is a perspective view of the seat frame of the vehicle seat according to the second embodiment of the present application.

[0059] Figure 22 FIG. 4 is a main part enlarged view of a back view of the seat frame according to the second embodiment of the present application.

[0060] Figure 23 FIG. 5 is a sectional view taken along line VII-VII of FIG. 4. Figure 20

[0061] Figure 24 FIG. 6 is a perspective view of the vehicle seat according to the third embodiment of the present application.

[0062] Figure 25 FIG. 7 is a perspective view of the seat frame of the vehicle seat according to the third embodiment of the present application.

[0063] Figure 26 FIG. 8 is a main part enlarged view of a front view of the backrest frame of the vehicle seat according to the third embodiment of the present application.

[0064] Figure 27A FIG. 9 is a perspective view of the backrest frame of the vehicle seat according to the third embodiment of the present application, which is a view for explaining the assembled state of the panel bracket and the mounting bracket.

[0065] Figure 27B FIG. 10 is a perspective view of the backrest frame of the vehicle seat according to the third embodiment of the present application, which is a view for explaining the assembled state of the panel bracket and the mounting bracket.

[0066] Figure 28A FIG. 11 is a front view of the mounting bracket of the vehicle seat according to the third embodiment of the present application.

[0067] Figure 28B FIG. 12 is a back view of the mounting bracket of the vehicle seat according to the third embodiment of the present application.

[0068] Figure 29 FIG. 13 is a sectional view taken along line VI-VI of FIG. 12. Figure 26 DETAILED DESCRIPTION

[0069] <Vehicle seat according to the first embodiment>

[0070] Hereinafter, a seat for a vehicle according to the first embodiment of the present application (hereinafter, referred to as the present embodiment) will be described with reference to Figures 1-16

[0071] ​​​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.

[0072] 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.

[0073] [1. Main Components of Vehicle Seat S]

[0074] 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.

[0075] 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).

[0076] The vehicle seat S can be transitioned from a passenger-accessible, in-use 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 in which the seat back S2 and headrest S3 are stowed in the stowed floor. Alternatively, the passenger can manually pull the seat body upward to return the stowed position to the in-use position.

[0077] 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 a skeleton mounts a cushion S21 and is covered with a trim cover S22 to constitute. The headrest S3 is formed by disposing a cushion S31 on a core material not shown and covering with a trim cover S32. The cushions S11, S21, S31 are constituted of a cushioning material having elasticity such as polyurethane foam, and the trim covers S12, S22, S32 are constituted of synthetic leather or cloth, and are formed by sewing a plurality of skin materials.

[0078] [2. Outline of seat frame]

[0079] First, referring to Figure 2 An outline of the seat frame F constituting the seat S will be described. Figure 2 Indicated Figure 1 The seat frame F of the seat on the right side of the vehicle seat S shown. As Figure 2 shown, the seat frame F is mainly constituted of a seat cushion frame 1 and a seat back frame 2. The seat cushion frame 1 constitutes a skeleton of a seating portion in the vehicle seat S, and the seat back frame 2 constitutes a skeleton of a backrest portion in the vehicle seat S.

[0080] As Figure 2 shown, the seat cushion frame 1 forms a square frame shape in appearance when viewed from above. Also, the seat cushion frame 1 has a side frame constituting an end portion in a seat width direction, and a disc frame constituting a front end portion of the seat cushion frame 1 as main constituent elements. The seat cushion frame 1 has a support leg 1a, which is engaged and fixed with a support base not shown in a use state in which a passenger can sit. Figure 1

[0081] The seat back frame 2 has a pipe frame 3, and a backrest plate 4 provided to the seat back of the pipe frame 3. The pipe frame 3 is a substantially rectangular frame-shaped body formed by folding a pipe member made of metal, and is constituted of a pair of side frames 3a disposed at left and right with an interval and extending in a length direction (a seat up-and-down direction), an upper frame 3b connecting upper end portions of the pair of side frames 3a, and a lower frame 3c connecting lower end portions, as Figure 2

[0082] A substantially flat surface in the seat width direction is formed on the front face of the upper frame 3b. A pair of pillar support portions for supporting headrest pillars not shown are respectively installed on portions where the substantially flat surface is formed. The headrest pillars not shown are inserted into the pillar support portions, and the headrest S3 is installed to the pillar support portions.

[0083] The backrest plate 4 is a panel member made of metal constituted of a substantially rectangular shape. The backrest plate 4 is respectively installed to the left and right side frames 3a of the pipe frame 3 through welding at left and right end portions in the seat width direction. Also, the backrest plate 4 is respectively installed to the upper frame 3b and the lower frame 3c through welding at upper and lower portions in the seat up-and-down direction.​​

[0084] [3. How to install the locking unit]

[0085] The vehicle seat S includes 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.

[0086] 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.

[0087] 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 ).

[0088] 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.

[0089] (Mounting bracket 10)

[0090] Below, refer to Figures 5-10 The structure of the mounting bracket 10 will be described.

[0091] 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 8FIG. 10 is an appearance view of the mounting bracket 10 as viewed from the rear upper side, Figure 9 FIG. 11 is an appearance view of the mounting bracket 10 as viewed from the outer side in the seat width direction, Figure 10 FIG. 12 is an appearance view of the mounting bracket 10 as viewed from the inner side in the seat width direction.

[0092] As shown in Figures 5-10 , the mounting bracket 10 is provided with an outer side surface 11 disposed on the outer side in the seat width direction, a front surface 12 and a rear surface 13 each disposed on the front and rear in the seat longitudinal direction, and an upper surface 14 and a lower surface 15 each disposed on the upper and lower in the seat vertical direction. Here, the outer side surface 11 links the front surface 12 and the rear surface 13 in the seat longitudinal direction, and links the upper surface 14 and the lower surface 15 in the seat vertical direction. As shown in Figure 5 , the mounting bracket 10 has a substantially box shape.

[0093] As shown in Figure 5 , Figure 9 , and Figure 10 , the outer side surface 11 of the mounting bracket 10 is provided with an opening 11a that spans the rear surface 13. In addition, the outer side surface 11 is provided with two mounting holes 11b in the seat vertical direction, which are used when the mounting lock unit 30 is installed, and are located closer to the front surface 12 than the rear surface 13 in the seat longitudinal direction.

[0094] As shown in Figure 5 , and Figure 10 , the rear surface 13 of the mounting bracket 10 is formed with a protrusion 13a that protrudes toward the front in the seat longitudinal direction. In other words, the rear surface 13 of the mounting bracket 10 is formed with the protrusion 13a that protrudes toward the outer side surface 11. As shown in Figure 4 , the mounting bracket 10 is welded and installed to the side frame 3a at the protrusion 13a.

[0095] As shown in Figure 5 , and Figure 7 , 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 Figure 4 , and Figure 5 , the upper surface 14 of the mounting bracket 10 is formed with the recess 14a that has an outer shape curved from the inner side in the seat width direction toward the direction toward the outer side (in other words, toward the outer side surface 11). In addition, as shown in Figure 5 , the lower surface 15 of the mounting bracket 10 is formed with the recess 15a that has an outer shape curved from the inner side in the seat width direction toward the direction toward the outer side (in other words, toward the outer side surface 11).

[0096] As shown in Figure 3 , and Figure 4As shown, the mounting bracket 10 is welded to the side frame 3a at the recess 14a of the upper surface 14. Also, although not shown, the mounting bracket 10 is similarly welded to the side frame 3a at the recess 15a of the lower surface 15. Since the mounting bracket 10 is mounted to the side frame 3a at both the recess 14a of the upper surface 14 and the recess 15a of the lower surface 15 in the seat up-down direction, the mounting of the mounting bracket 10 to the side frame 3a is stable.

[0097] As shown, the mounting bracket 10 has a slit 14b in the upper surface 14 and a slit 15b in the lower surface 15. The slit 14b is formed in the upper surface 14 so as to extend from a corner portion adjacent to the outer side surface 11 and the rear surface 13 toward the recess 14a. Also, similarly, the slit 15b is formed in the lower surface 15 so as to extend from a corner portion adjacent to the outer side surface 11 and the rear surface 13 toward the recess 15a. Figure 5

[0098] The mounting bracket 10 is formed by punching and bending a metal plate. At this time, since the upper surface 14 and the lower surface 15 of the mounting bracket 10 are configured to have the slits 14b and 15b, respectively, the upper surface 14 and the lower surface 15 having the slits 14b and 15b can be formed by bending the metal plate, and the like, and thus the operation of shaping the mounting bracket 10 is facilitated. Also, since the mounting bracket 10 is formed with the opening 11a at a position across the outer side surface 11 and the rear surface 13, the operation of shaping the mounting bracket 10 is facilitated, and the outer side surface 11 in which the locking unit 30 is to be mounted can be secured without reducing the rigidity and achieving weight reduction.

[0099] (Stiffening bracket 20)

[0100] Hereinafter, the configuration of the stiffening bracket 20 will be described with reference to Figure 11 and Figure 12 The stiffening bracket 20 is formed of a bent plate member made of metal, and has a base portion 21 having an upper end portion 21a and a lower end portion 21b arranged in the seat up-down direction, and a front end portion 22 and a rear end portion 23 bent from the base portion 21 in the seat front-rear direction when mounted to the seat back frame 2 of the vehicle seat S.

[0101] Figure 11 FIG. 2 is an appearance view of the stiffening bracket 20 as viewed from the front,FIG. 3 is an appearance view of the stiffening bracket 20 as viewed from the rear. Figure 12

[0102] The stiffening bracket 20 is formed of a bent plate member made of metal, and has a base portion 21 having an upper end portion 21a and a lower end portion 21b arranged in the seat up-down direction, and a front end portion 22 and a rear end portion 23 bent from the base portion 21 in the seat front-rear direction when mounted to the seat back frame 2 of the vehicle seat S. Figure 11 and Figure 12 As shown in FIGS. 2 and 3, 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.

[0103] As shown in FIGS. 2 and 3, 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. Figure 10 and​Figure 11 As shown, the reinforcement bracket 20 is formed with reinforcement ribs 24a and 24b extending between the front end 22 and the rear end 23. Specifically, the reinforcement rib 24a (upper reinforcement rib) is formed near the upper end 21a of the reinforcement bracket 20, and the reinforcement rib 24b (lower reinforcement rib) is formed near the lower end 21b. The reinforcement ribs 24a and 24b are provided to increase the rigidity of the reinforcement bracket 20. 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 .

[0104] Furthermore, the vehicle seat S has an upper reinforcing rib (reinforcing rib 24a) at the upper end 21a of the reinforcement bracket 20 and a lower reinforcing rib (reinforcing rib 24b) at the lower end 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 front to back. Therefore, the reinforcement bracket 20 having the upper reinforcing rib (reinforcing rib 24a) and the lower reinforcing rib (reinforcing rib 24b) with the spacing gradually increasing from front to back improves the strength of the vehicle seat S against impacts applied from the front-to-back direction.

[0105] 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.

[0106] 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.

[0107] (Locking unit 30)

[0108] 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.

[0109] The locking unit 30 includes a spring member (not shown) and a lock piece 33 ( Figure 4 ) is a known locking unit. The locking piece 33 engages with a striker (engaged portion) supported by the vehicle body, not shown, thereby locking the seat back frame 2 in its tilt position. 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 seat back frame 2 from its tilt position.

[0110] 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 that constitutes the seat back frame 2 via the mounting bracket 10.

[0111] (Cable component 50)

[0112] 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.

[0113] Thus, since the first end portion 51a of the cable member 50 is attached to the outer side surface 11 of the attachment bracket 10 and the second end portion 52a is attached to the seat back frame 2 (the upper frame 3b), the support bracket 40 and the lock release member 41 are fixed by a simple configuration. In addition, in the front-rear direction of the seat, the front portion 42 of the support bracket 40 is fixed by welding to the front surface 12 of the attachment bracket 10 and the rear portion 43 is attached to the connecting portion 53 of the cable member 50, so the lock release member 41 can be stably supported.

[0114] <Explanation of Effects of the Seat S>

[0115] The seat S (occupant seat) according to the above description is a seat S provided with a seat back S2 that can be tilted with respect to a seat cushion S1, the seat back S2 being provided with a seat back frame 2, a lock unit 30 that engages with an engaged portion (punch) provided to a vehicle body and locks the tilt of the seat back frame 2, the seat back frame 2 having a side frame 3a that extends in the up-down direction of the seat S, an attachment bracket 10 that is attached to the outer side of the seat S in the width direction of the seat S, the lock unit 30 being attached to an outer side surface 11 of the attachment bracket 10 in the width direction of the seat S, and the side frame 3a and the attachment bracket 10 being connected by a reinforcement bracket 20.

[0116] Thus, the strength of the side frame periphery in which the lock unit 30 is attached is increased by the reinforcement bracket, so the lock unit 30 can be stably supported.

[0117] In addition, according to the seat S, the attachment bracket 10 is provided with a front surface 12 and a rear surface 13 in the front-rear direction of the seat S, the front surface 12 and the rear surface 13 are connected by the outer side surface 11, and the reinforcement bracket 20 connects the side frame 3a and the front surface 12 of the attachment bracket 10. Thus, by appropriately increasing the strength of the attachment bracket 10, the lock unit 30 can be more stably supported.

[0118] In addition, according to the seat S, the rear surface 13 of the attachment bracket 10 has a protrusion 13a that protrudes toward the front in the front-rear direction of the seat S, and the attachment bracket 10 is attached to the side frame 3a on the protrusion 13a. Thus, the attachment of the attachment bracket 10 to the side frame 3a is stable, and the lock unit 30 can be more stably supported.

[0119] In addition, according to the seat S, the attachment bracket 10 is provided with an opening 11a that spans the rear surface 13 and the outer side surface 11, so the outer side surface 11 in which the lock unit 30 is attached can be ensured while the rigidity of the attachment bracket 10 is not reduced, and weight reduction can be achieved.

[0120] Further, according to the vehicle seat S, the mounting bracket 10 has the upper surface 14 and the lower surface 15 in the up-down direction of the vehicle seat S, the upper surface 14 has the first recess (recess 14a) engaged with the side frame 3a, and the lower surface 15 has the second recess (recess 15a) engaged with the side frame 3a, and the mounting bracket 10 is mounted to the side frame 3a on the first recess (recess 14a) and the second recess (recess 15a). Therefore, since the mounting bracket 10 is mounted to the side frame 3a on the first recess (recess 14a) and the second recess (recess 15a) of the upper surface 14 and the lower surface 15 in the up-down direction of the seat, the mounting of the mounting bracket 10 to the side frame 3a is more stable.

[0121] Further, according to the vehicle seat S, the mounting bracket 10 has the slits 14b, 15b in the upper surface 14 and the lower surface 15, respectively. Therefore, since the upper surface 14 and the lower surface 15 of the mounting bracket 10 have the slits 14b, 15b, respectively, the upper surface 14 and the lower surface 15 having the slits 14b, 15b can be formed by bending a sheet material or the like, and thus the operation at the time of forming the mounting bracket 10 becomes easy.

[0122] Further, according to the vehicle seat S, the reinforcing bracket 20 has the front end portion 22 and the rear end portion 23 in the front-rear direction of the vehicle seat S, and the reinforcing ribs 24a, 24b extending between the front end portion 22 and the rear end portion 23 are formed. Therefore, by providing the reinforcing ribs 24a, 24b, the rigidity of the reinforcing bracket 20 can be improved.

[0123] Further, according to the vehicle seat S, the reinforcing ribs 24a, 24b have the upper reinforcing rib (reinforcing rib 24a) at the upper end portion 21a of the reinforcing bracket 20 and the lower reinforcing rib (reinforcing rib 24b) at the lower end portion 21b of the reinforcing bracket 20, and the interval between the upper reinforcing rib (reinforcing rib 24a) and the lower reinforcing rib (reinforcing rib 24b) gradually widens from the front to the rear in the front-rear direction of the vehicle seat S. Therefore, since the reinforcing bracket 20 has the upper reinforcing rib (reinforcing rib 24a) and the lower reinforcing rib (reinforcing rib 24b) whose interval gradually widens from the front to the rear, the strength against the impact applied in the front-rear direction of the vehicle seat S can be improved.

[0124] Further, according to the vehicle seat S, the lock release member 41 that releases the lock of the inclination of the seatback frame 2, the support bracket 40 that supports the lock release member 41, and the cable member 50 that is mounted to the support bracket 40 are provided, one end portion (first end portion 51a) of the cable member 50 is mounted to the outer surface 11 of the mounting bracket 10, and the other end portion (second end portion 52a) is mounted to the seatback frame 2 (upper frame 3b). Therefore, the lock release member 41 can be fixed with a simple configuration.

[0125] Further, as 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.

[0126] <Modification>

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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 in FIG. 10, the reinforcing bracket 20X is formed with reinforcing ribs 24Xa, 24Xb extending between the front end portion 22X and the rear end portion 23X. Specifically, the reinforcing rib 24Xa (upper side reinforcing rib) is formed at a position close to the upper end portion 21Xa of the reinforcing bracket 20X, and the reinforcing rib 24Xb (lower side reinforcing rib) is formed at a position close to the lower end portion 21Xb.

[0133] As shown in FIG. 10, the reinforcing bracket 20X is formed with reinforcing ribs 24Xa, 24Xb extending between the front end portion 22X and the rear end portion 23X. Specifically, the reinforcing rib 24Xa (upper side reinforcing rib) is formed at a position close to the upper end portion 21Xa of the reinforcing bracket 20X, and the reinforcing rib 24Xb (lower side reinforcing rib) is formed at a position close to the lower end portion 21Xb. Figure 15 Figure 16 As shown in FIG. 10, the reinforcing bracket 20X is formed with reinforcing ribs 24Xa, 24Xb extending between the front end portion 22X and the rear end portion 23X. Specifically, the reinforcing rib 24Xa (upper side reinforcing rib) is formed at a position close to the upper end portion 21Xa of the reinforcing bracket 20X, and the reinforcing rib 24Xb (lower side reinforcing rib) is formed at a position close to the lower end portion 21Xb. Figure 16 Figure 16 As shown in FIG. 10, the reinforcing bracket 20X is formed with reinforcing ribs 24Xa, 24Xb extending between the front end portion 22X and the rear end portion 23X. Specifically, the reinforcing rib 24Xa (upper side reinforcing rib) is formed at a position close to the upper end portion 21Xa of the reinforcing bracket 20X, and the reinforcing rib 24Xb (lower side reinforcing rib) is formed at a position close to the lower end portion 21Xb.

[0134] The above-described vehicle seat according to the first embodiment is not limited to a vehicle seat mounted on a vehicle, and can be a seat mounted on a vehicle other than an automobile, such as a train or a ship.

[0135] <Description of a vehicle seat according to a second embodiment>

[0136] Next, a vehicle seat according to a second embodiment will be described. In describing the vehicle seat according to the second embodiment, a problem related to a seat for a vehicle will be described.

[0137] Conventionally, a vehicle seat in which a cable member (anchor member) for fixing a child seat is mounted to a backrest frame or a cushion frame as a seat frame has been known, and various attempts have been made to improve the mounting rigidity of the cable member.

[0138] For example, in a vehicle seat described in Japanese Patent Application Publication No. 2009-202788, a U-shaped cable member for fixing a child seat is mounted to a rear end of a cushion frame.

[0139] Specifically, the cable member is fixed to a link pipe erected in the left-right direction at the rear end of the cushion frame, and engages with a flange portion formed at the upper end of a left and right cushion side frame. According to the above-described configuration, the mounting rigidity of the cable member is ensured.

[0140] In addition, in a vehicle seat described in Japanese Patent Application Publication No. 2014-151660, an anchor member for fixing a child seat is fixed to a link pipe at the rear end of a cushion frame by a bracket. ​​

[0141] (Problem to be solved by the seat for a ride vehicle according to the second embodiment)

[0142] However, in the vehicle seat described in Japanese Patent Application Publication No. 2009-202788, the cable member is engaged with the seat frame at a plurality of positions.

[0143] Therefore, there is a need for a vehicle seat capable of ensuring simple mounting operability while improving the mounting rigidity of the cable member.

[0144] In addition, in the vehicle seat described in Japanese Patent Application Publication No. 2014-151660, the anchor member is mounted to the seat frame by another bracket.

[0145] Therefore, there is a need for a vehicle seat capable of suppressing an increase in weight and mounting the cable member in a relatively compact configuration.

[0146] The present application was achieved in view of the above-described problem, and an object of the present application is to provide a vehicle seat capable of ensuring simple mounting operability while improving the mounting rigidity of a cable member (particularly, a cable member for fixing a child seat).

[0147] In addition, another object of the present application is to provide a vehicle seat capable of suppressing an increase in weight and mounting the cable member in a relatively compact configuration.

[0148] The above-described problem is solved by the following means. According to the vehicle seat of the present application, there are provided a back frame serving as a skeleton of a backrest portion, a mounting bracket disposed at an outer side portion in a seat width direction of the back frame and mounted to a lower portion of the back frame, and a cable member mounted to the lower portion of the back frame and the mounting bracket, respectively, the cable member having an inner side end portion disposed at an inner side in the seat width direction and mounted to the back frame and an outer side end portion disposed at an outer side in the seat width direction and mounted to an outer side portion in the seat width direction of the mounting bracket.

[0149] As described above, since the cable member has the inner side end portion disposed at the inner side in the seat width direction and mounted to the lower portion of the back frame and the outer side end portion disposed at the outer side in the seat width direction and mounted to the outer side portion in the seat width direction of the mounting bracket, simple mounting operability can be ensured. In addition, since the outer side end portion of the cable member is disposed and mounted to the outer side portion of the mounting bracket, the mounting bracket can be mounted relatively stably.

[0150] Therefore, compared to the prior art, a vehicle seat capable of ensuring simple mounting operability while improving the mounting rigidity of a cable member (particularly, a cable member for fixing a child seat) can be achieved.

[0151] Further, a vehicle seat capable of suppressing an increase in weight and capable of mounting a cable member in a relatively compact configuration is achieved.

[0152] At this time, it is preferable that the mounting bracket be mounted to an outer side surface of the back frame, link the back frame and a support base provided on a floor of a vehicle body.

[0153] According to the above configuration, since the mounting bracket is a member having high rigidity that links the back frame and the support base provided on the floor of the vehicle body, the mounting rigidity of the cable member mounted to the outer side surface of the mounting bracket is improved.

[0154] At this time, it is preferable that the back frame include a frame-shaped main frame composed of a pipe member, the inner side end portion be mounted to a lower end portion of the main frame and extend in the seat front-rear direction along an outer peripheral surface of the lower end portion, and the outer side end portion extend in the seat front-rear direction along the outer side surface of the mounting bracket.

[0155] As described above, since the inner side end portion and the outer side end portion of the cable member are mounted in a state of extending in the seat front-rear direction, respectively, the mounting rigidity of the cable member can be ensured when a load from the outside is received in the seat front-rear direction or when a load is received due to sudden start or sudden stop.

[0156] At this time, it is preferable that the mounting bracket include a side wall portion disposed on an outer side of the main frame in the seat width direction, a front wall portion continuously curved from one end portion of the side wall portion in the seat width direction and extending toward a front surface of the main frame, and a rear wall portion continuously curved from the other end portion of the side wall portion in the seat width direction and extending toward a rear surface of the main frame opposite to the front wall portion, and the front wall portion and the rear wall portion of the mounting bracket be engaged with the main frame.

[0157] Further, it is preferable that the side wall portion extend in the seat up-down direction along the main frame, and a curved portion curved in the seat width direction toward an inner side of the main frame be formed between a portion of the side wall portion corresponding to the main frame in the seat up-down direction and the lower end portion to which the cable member is mounted.

[0158] According to the above configuration, 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.

[0159] At this time, it is preferable that a cushion frame including a skeleton as a seating portion include a cushion side frame mounted to an outer side of the main frame in the seat width direction and constituting a side of the seat width direction, and the outer side end portion be disposed in a gap formed between the mounting bracket and the cushion side frame in the seat width direction.

[0160] According to the above configuration, the cable member can be installed in a relatively compact configuration. In addition, if the seat is a vehicle seat having a tilting structure, stable tilting operation of the seat back can be achieved.

[0161] At this time, it is preferable that the main frame has side frame portions on the left and right sides in the seat width direction, a lower frame portion that links lower ends of the left and right side frame portions, the mounting bracket is mounted to an outer side surface of the side frame portions, and a reinforcing bracket is provided in the main frame, the reinforcing bracket linking a portion of the side frame portion in which the mounting bracket is mounted and the lower frame portion.

[0162] According to the above configuration, the rigidity of the seat back frame can be improved. In particular, when a load in the seat front-rear direction is relatively large, the distortion of the frame-shaped main frame composed of the pipe member can be suppressed.

[0163] At this time, it is preferable that the reinforcing bracket has a substantially U-shaped cross section, and a stepped uneven portion that is curved toward one side in the seat front-rear direction is formed in a peripheral portion of an end portion of the reinforcing bracket that is mounted to the lower frame portion.

[0164] According to the above configuration, the rigidity of the seat back frame can be further improved. In addition, by mounting the reinforcing bracket around the corner portion of the main frame, the rigidity of the frame can be ensured even if the main frame itself has a simple shape, and as a result, weight reduction, cost reduction, and sharing of constituent parts can be achieved.

[0165] At this time, it is preferable that the reinforcing bracket has a side wall portion that is disposed inside the frame shape of the main frame, a front wall portion that is continuous and curved from one end portion in the width direction of the side wall portion and extends toward the front of the main frame, a rear wall portion that is continuous and curved from the other end portion in the width direction of the side wall portion and extends toward the rear of the main frame opposite to the front wall portion, the front wall portion and the rear wall portion are engaged with the main frame, and cutout portions for avoiding interference with the main frame are formed in the side wall portion near both end portions of the main frame.

[0166] According to the above configuration, simple mounting operability can be achieved. In addition, the generation of abnormal noise caused by contact of the constituent parts during vehicle travel can be suppressed.

[0167] At this time, it is preferable that the seat back frame has a panel frame that is disposed behind the seat in the main frame, and a reinforcing recessed portion that is recessed toward the rear of the seat is formed in a portion of the panel frame that is opposite to the reinforcing bracket in the seat front-rear direction.

[0168] According to the above configuration, in addition to improving the rigidity of the panel frame, the mounting operability of the reinforcing bracket can be ensured.

[0169] (Effect of the seat for a ride according to the second embodiment)

[0170] According to the seat for a ride according to the second embodiment described below, a vehicle seat that ensures simple mounting operability while improving mounting rigidity of a cable member (particularly, a cable member for fixing a child seat) can be realized compared to the related art. In addition, a vehicle seat that can suppress an increase in weight and can mount a cable member in a relatively compact configuration can be realized.

[0171] According to the seat for a ride according to the second embodiment described below, mounting rigidity of a cable member is improved. Particularly, when a load from the outside is received in the seat front-rear direction or when a load is received due to sudden start or sudden stop, mounting rigidity of the cable member can be ensured.

[0172] According to the seat for a ride according to the second embodiment described below, mounting rigidity of the mounting bracket with respect to the main frame is improved, and mounting rigidity of the cable member is improved.

[0173] According to the seat for a ride according to the second embodiment described below, a cable member can be mounted in a relatively compact configuration. In addition, if it is a vehicle seat provided with a tilt structure, stable tilting operation of the seat backrest can be realized.

[0174] According to the seat for a ride according to the second embodiment described below, rigidity of the backrest frame can be improved. Particularly, when a relatively large load is received in the seat front-rear direction, distortion of the frame-shaped main frame composed of the pipe member can be suppressed.

[0175] According to the seat for a ride according to the second embodiment described below, weight reduction, cost reduction, and sharing of constituent parts can be realized.

[0176] According to the seat for a ride according to the second embodiment described below, simple mounting operability can be realized. Generation of abnormal noise caused by contact of each constituent part during vehicle travel can be suppressed.

[0177] Hereinafter, the second embodiment of the present application will be described with reference to Figures 17-23 The second embodiment of the present application will be described.

[0178] 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.

[0179] Furthermore, with respect to the seat back of a vehicle seat, the side on which a seat occupant sits is the front side.

[0180] The vehicle seat S100 according to the second embodiment is, for example, a rear seat corresponding to rear seats of a vehicle.

[0181] 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.

[0182] 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.

[0183] 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 .

[0184] 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.

[0185] 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.

[0186] 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 .

[0187] 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 .

[0188] 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 .

[0189] 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.

[0190] 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.

[0191] 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.

[0192] 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 .

[0193] 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.

[0194] 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.

[0195] 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.

[0196] 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.

[0197] 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.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] like Figure 19 、 Figure 23As shown, in a lower portion of the panel frame 113, a reinforcing recessed portion 113b recessed toward the rear of the seat is formed in a portion opposite to the reinforcing bracket 116 in the front-rear direction of the seat.

[0204] As shown, the reinforcing recessed portion 113b has a width equivalent to that of the reinforcing bracket 116 and extends in the extension direction of the reinforcing bracket 116. In detail, the outer side end portion thereof in the seat width direction extends to a position opposite to the rear face of the side frame portion 111c, and the inner side end portion thereof extends to a position opposite to the rear face of the lower frame portion 111b. Figure 19

[0205] Thus, in addition to improving the rigidity of the panel frame 113, since the gap is formed, the mounting operability of the reinforcing bracket 116 can be ensured. In addition, generation of abnormal noise caused by contact of each component part when the vehicle is running can be suppressed.

[0206] As shown, Figure 18 , Figure 19 As shown, the skin suspension cable 115 is a cable for suspending the skin end portion of the seat cushion 102 or the seat back 101, and is mainly composed of a cable main body portion 115a extending in the seat width direction, a pair of cable extension portions 115b continuously and bent from the left and right end portions of the cable main body portion 115a and extending upward, and a pair of cable end portions 115c continuously and bent from the upper end portions of the pair of cable extension portions 115b and extending inward in the seat width direction.

[0207] The substantially central portion of the cable main body portion 115a is joined to the lower end portion of the panel frame 113 by welding, and the pair of cable end portions 115c are respectively joined to the bottom face of the lower frame portion 111b by welding.

[0208] In addition, the pair of cable end portions 115c are disposed at positions corresponding to the portion of the lower frame portion 111b in which the reinforcing bracket 116 is installed in the seat width direction, in other words, at positions overlapping vertically.

[0209] According to the above-described configuration, the assembly rigidity of the skin suspension cable 115 is improved.

[0210] As shown, Figures 19-22 As shown, the reinforcing bracket 116 is a bracket for reinforcing the back frame 110, has a substantially U-shaped cross section, extends in an inclined direction inclined with respect to the extension direction (vertical direction) of the link frame 112, and links the side frame portion 111c and the lower frame portion 111b.

[0211] ​In detail, the reinforcement bracket 116 is mainly composed of a side wall portion 116a arranged in the frame-like interior of the main frame 111, a front wall portion 116b continuously and curved from the width direction front end portion of the side wall portion 116a, extending to the front of the main frame 111, a rear wall portion 116c continuously and curved from the width direction rear end portion of the side wall portion 116a, extending to the rear of the main frame 111, and opposite to the front wall portion 116b.

[0212] Further, the seat width direction outer end portions of the front wall portion 116b and the rear wall portion 116c are joined to the main frame 111 (side frame portion 111c) by welding, and the inner end portions 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.

[0213] As shown in FIG. 6, in the reinforcement bracket 116, cutout portions 116d for avoiding interference with the main frame 111 are formed in both end portions of the side wall portion 116a close to the main frame 111. Figure 19

[0214] In other words, the front wall portion 116b and the rear wall portion 116c respectively extend by a portion more protruding than the side wall portion 116a, abutting the outside of the main frame 111. Further, these abutting portions are joined, respectively forming welding traces.

[0215] As described above, both end portions of the reinforcement bracket 116 in the seat width direction are assembled in a form sandwiching the main frame 111, and the both end portions on both sides in the seat front and rear direction are joined by welding. Therefore, the rigidity of the portion and the surrounding portion where the reinforcement bracket 116 is assembled is improved.

[0216] Further, in the front wall portion 116b, a surrounding portion (in detail, a close portion) of the end portion installed to the lower frame portion 111b is formed with a stepped uneven portion 116e curved to the rear side in the seat front and rear direction.

[0217] In other words, when the front wall portion 116b is divided into an upper portion and a lower portion with the stepped uneven portion 116e as a boundary, the upper portion is formed in a shape recessed to the rear side with respect to the lower portion.

[0218] According to the above-described configuration, when a seated person is seated, since the frame portion of the reinforcement bracket 116 is formed in a shape not contacting the waist portion or the surrounding of the seated person, it is possible to improve the seating feeling and the ride comfort of the seated person.

[0219] As shown in FIG. 6, in the reinforcement bracket 116, cutout portions 116d for avoiding interference with the main frame 111 are formed in both end portions of the side wall portion 116a close to the main frame 111. Figures 19-22 ​As shown, the mounting bracket 117 is composed of a sheet metal member extending in the up-down direction, and forms a substantially arc shape when viewed from the seat side, and the upper portion of the mounting bracket 117 is attached to the outer side of the seat width direction of the main frame 111, and the lower end portion is attached to the inner side of the support base 140.

[0220] In detail, as shown in Figure 21 , the mounting bracket 117 is composed of a substantially U-shaped cross section, and mainly composed of a side wall portion 117a disposed on the outer side of the seat width direction of the main frame 111, a front wall portion 117b continuously curved from the front end portion of the width direction of the side wall portion 117a and extending toward the front of the main frame 111, and a rear wall portion 117c continuously curved from the rear end portion of the width direction of the side wall portion 117a and extending toward the rear of the main frame 111 opposite to the front wall portion 117b.

[0221] The side wall portion 117a extends in the up-down direction along the main frame 111, and the lower end portion is attached in a manner rotatable with respect to the support base 140. In addition, the inner side end portions of the front wall portion 117b and the rear wall portion 117c in the seat width direction are joined to the main frame 111 (side frame portions 111c and 111d) by welding.

[0222] As shown in Figure 20 , Figure 21 , a curved portion 117d is formed along the shape of the main frame 111 and curved toward the inner side of the seat width direction.

[0223] That is, in the mounting bracket 117, a gap (space) is formed between the portion where the curved portion 117d is formed and the component disposed on the outer side of the seat width direction than the mounting bracket 117.

[0224] Therefore, in addition to improving the mounting rigidity of the mounting bracket 117 with respect to the main frame 111, the assembly operability of the mounting bracket 110 with respect to the support base 140 can also be improved.

[0225] In the portion of the mounting bracket 117 opposite to the outer side end portion of the reinforcing bracket 116 in the seat width direction, as shown in Figure 21 , a cutout portion 117e is formed for avoiding interference with the reinforcing bracket 116.

[0226] In other words, the front wall portion 117b and the rear wall portion 117c respectively cover the main frame 111 with a portion extending toward the inner side of the seat width direction, and the extending portions are joined and respectively form a welding mark in a manner avoiding the portion opposite to the outer side end portion of the reinforcing bracket 116.

[0227] 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.

[0228] 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.

[0229] 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 .

[0230] 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.

[0231] 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.

[0232] 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.

[0233] 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.

[0234] 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.

[0235] 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 .

[0236] Further, a cushion rotating device 126 is attached to the rear end portion of the left side frame 121, and rotatably connects the back frame 110 and the cushion frame 120 about a cushion rotating shaft 127.

[0237] As shown in Figure 18 , the front connecting pipe 122 is formed of a substantially C-shaped pipe member, and a foot rotating device 128 is attached to the inner side in the seat width direction thereof, and rotatably connects the cushion frame 120 and the support foot 130 about a foot rotating shaft 129.

[0238] As shown in Figure 18 , the support foot 130 is a substantially C-shaped pipe member that supports the seat cushion 102, and has a foot body portion 131 disposed to the left and right side, and a foot connecting portion 132 that connects the lower end portions of the respective foot body portions 131.

[0239] The upper end portions of the foot body portions 131 are connected to the central portions in the seat front-rear direction on the left and right inner sides of the cushion frame 120. Further, the central portions in the seat width direction of the foot connecting portion 132 are detachably held to a not-shown foot holding member provided on the vehicle body floor.

[0240] The upper end portions of the support foot 130 protrude more toward the seat front than the lower end portions of the support foot 130, and are inclined upward and forward from the lower end portions of the support foot 130 toward the upper end portions of the support foot 130.

[0241] The support base 140 is a member that supports the seat back 101, and is formed of a substantially L-shaped sheet metal member that is elongated in the front-rear direction, as shown in Figure 18 , Figure 19 , and is disposed to the side in the seat width direction and connected to the vehicle body floor.

[0242] The support base 140 is mainly formed of a connecting wall portion 141 connected to the upper surface of the vehicle body floor, and an outer wall portion 142 that is bent upward and extends from the left and right outer end portions of the connecting wall portion 141, and is connected to the lower end portion of the mounting bracket 117 via the seat rotating shaft 118.

[0243] The switching device 150 is formed of a known device that switches the vehicle seat S100 from the use state to the storage state, and is attached to the upper portion of the back frame 110, as shown in Figure 17 , Figure 18 .

[0244] The switching device 150 has an engagement hook that is detachably provided to an engagement striker that is a part of the vehicle body member, and not shown, and an operation lever 151 that moves the front end portion of the engagement hook in the seat up-down direction and engages the engagement striker.

[0245] Further, the engagement hook is linked to the operating lever 151 by a cable not shown, and is a configuration that enables the engagement hook to switch between a lockable state in which the engagement hook is locked to the lockable striker and an un-lockable state in which the engagement hook is not locked to the lockable striker, by the operating lever 151.

[0246] When the passenger operates the operating lever 151, the vehicle seat S100 is released from the locked state of the backrest frame 110 from the use state by the switching device 150. Concomitantly with the release of the locked state of the seat backrest 101, the tilting device 119 operates, and specifically, the backrest frame 110 is able to rotate and fold toward the front side by the urging of a coil spring not shown.

[0247] Further, concomitantly with the rotational operation of the backrest frame 110, the cushion rotating device 126 and the foot rotating device 128 respectively operate, and specifically, the support foot 130 is able to rotate and fold toward the cushion frame 120 side with the foot rotating shaft 129 as the center by the urging of a coil spring not shown.

[0248] By the above series of operations, the seat main body is housed in the housing floor, and the vehicle seat S100 is switched from the use state to the housing state.

[0249] Further, if it is desired to restore the vehicle seat S100 from the housing state to the use state, the passenger causes the seat main body to resist the urging of a coil spring not shown and to be lifted by hand or the like, and causes the engagement hook of the switching device 150 to engage with the engagement striker, and switches the backrest frame 110 to the locked state.

[0250] The cable member 160 is an anchor for linking a child seat, and as shown in Figures 19-22 is installed in pairs at the lower end of the main frame 111 with a specific interval in the seat width direction.

[0251] Specifically, as shown in Figure 21 , the pair of cable members 160 is configured in a substantially U shape, and is mainly composed of a cable main body portion 161 extending in the seat width direction, an inner side end portion 162 continuing and bending from the inner side end portion of the cable main body portion 161 in the seat width direction and extending toward the rear of the seat, and an outer side end portion 163 continuing and bending from the outer side end portion of the cable main body portion and extending toward the rear of the seat.

[0252] The inner side end portion 162 of the cable member 160 on the left side extends along the outer peripheral surface of the lower frame portion 111b toward the rear of the seat and abuts against the outer peripheral surface of the lower frame portion 111b. Further, the abutment portions are joined and a weld mark is formed.

[0253] Further, the outer side end portion 163 extends along the outer side surface of the mounting bracket 117 in the seat width direction toward the rear and abuts against the outer side surface. Further, the abutment portions are joined and a weld mark is formed.

[0254] On the other hand, the inner side end portion 162 and the outer side 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. Further, the abutment portions are joined and a weld mark is formed.

[0255] Hereinafter, the left cable member 160 will be described.

[0256] As shown in FIG. 6, the inner side 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 111b, abuts against the bottom surface and the rear surface, and is welded. Figure 21

[0257] Thus, the assembly rigidity of the cable member 160 with respect to the main frame 111 is improved, and a balanced configuration that takes into account the assembly operability of the cable member is achieved.

[0258] The cable body portion 161 and the outer side end portion 163 extend so as to cover the front surface and the outer side surface of the mounting bracket 117, abut against the front surface and the outer side surface, and are welded.

[0259] Thus, the cable member 160 is supported by the mounting bracket 117 from the rearward direction of the seat to the frontward direction and from the inner side to the outer side in the seat width direction, and thus the assembly rigidity of the cable member 160 is greatly improved. For example, the assembly rigidity of the cable member is greatly improved compared to a case in which the outer side end portion 163 is mounted to the inner side surface of the mounting bracket 117.

[0260] As shown in FIG. 6, the outer side end portion 163 is disposed in the mounting bracket 117 in a gap between the portion where the curved portion 117d is formed and the side frame 121 in the seat width direction. Figure 20

[0261] In other words, the cable member 160 is disposed at a position that does not protrude more than the main frame 111 in the seat width direction, that is, at a position that is more inward than the outer side surface of the main frame 111.

[0262] Thus, in addition to being able to improve the rigidity of the mounting bracket 117 itself and improve the assembly rigidity of the cable member 160, it is also possible to suppress interference of the cable member 160 with other constituent members.

[0263] In particular, in the vehicle seat S100 of the present embodiment that is capable of changing the seat configuration between the use state and the storage state, since it is possible to avoid mutual interference of the rotating action of the cushion frame 120 and the constituent members, a particularly advantageous effect can be achieved.

[0264] [Other Embodiments]

[0265] In the above-described second embodiment, as shown in FIG. 6, the inner side end portion 162 and the outer side end portion 163 of the cable member 160 extend rearward along the outer peripheral surface of the lower frame portion 111b and abut against the outer peripheral surface. Figure 17 ​​As shown, the vehicle seat S100 is formed as a rear seat of the vehicle, but is not particularly limited, and can be a front seat of the vehicle, or can be a middle seat in a vehicle having three rows of seats.

[0266] In the above-described second embodiment, the vehicle seat S100 is a seat capable of seat arrangement between a use state and a storage state, but is not particularly limited, and for example, can be a seat capable of seat arrangement in three forms of a use state, a storage state, and a flipped-up state in which the seat body is jumped up in the upward direction.

[0267] In addition, a storage floor is formed in front of the seat of the vehicle seat S100, but is not particularly limited, and the storage floor can be formed behind the vehicle seat S100.

[0268] In the above-described second embodiment, as shown in Figure 18 , Figure 19 As shown, the support base 140 is directly fixed to the vehicle body floor, but is not particularly limited, and for example, can be indirectly fixed to the vehicle body floor by a guide rail device that supports the seat body to be movable in the front-rear direction.

[0269] In the above-described second embodiment, the reinforcing bracket 116 or the mounting bracket 117 is mounted to the main frame 111 by welding, but the welding method is not particularly limited, and various welding methods, such as arc welding and spot welding, can be used in addition to laser welding.

[0270] In the above-described second embodiment, as shown in Figure 19 The upper portion of the mounting bracket 117 is mounted to the backrest frame 110, and the lower portion thereof is mounted to the support base 140, but this can be changed.

[0271] For example, the lower portion of the mounting bracket 117 can be mounted to the cushion frame 120, or can be mounted to a guide rail device provided in another manner.

[0272] In the above-described second embodiment, as shown in Figure 21 The inner side end portion 162 of the cable member 160 extends along the outer peripheral surface of the lower frame portion 111b and is mounted, but is not particularly limited, and for example, can extend through the lower frame portion 111b and be mounted by welding.

[0273] Similarly, the outer side end portion 163 can extend through the seat width direction of the mounting bracket 117 and be mounted by welding.

[0274] In the above-described second embodiment, the stowable vehicle seat for a car used in a car was described as a specific example, but is not limited thereto, and can be used as a seat for a vehicle used in an airplane, a ship, or the like, in addition to a seat for a vehicle used in a train, a bus, or the like.

[0275] In the second embodiment, the vehicle seat S100 to which the present application is applied was mainly described.

[0276] However, the above-described second embodiment is merely an example for facilitating understanding of the present application, and is not intended to limit the present application. That is, regarding the shape, size, arrangement, and the like of the components described below, it is needless to say that the present application includes equivalents thereof while being changed and modified without departing from the gist thereof.

[0277] In particular, regarding the shape, arrangement, and configuration of the backrest frame 110, the reinforcing bracket 116, the mounting bracket 117, and the cable member 160, the above-described embodiment describes only one example, and is not intended to limit the present application.

[0278] <Vehicle seat to which the third embodiment is applied>

[0279] Next, the vehicle seat to which the third embodiment is applied will be described. In describing the vehicle seat to which the third embodiment is applied, a problem related to a seat for a vehicle will be described.

[0280] Conventionally, a vehicle seat in which a seat belt guide for guiding a seat belt is attached to an upper end of a backrest frame serving as a skeleton of a seat back has been known.

[0281] For example, a vehicle seat in which a seat belt retractor for winding a seat belt is attached to a central portion of a backrest frame, and a seat belt guided by a seat belt guide from the seat belt retractor is constituted (for example, Japanese Patent Application Laid-Open No. 2017-226376, International Publication No. 2016 / 016924).

[0282] The seat for a vehicle described in Japanese Patent Application Laid-Open No. 2017-226376 is provided with a backrest frame constituted by a frame-shaped main frame composed of a pipe material, a link frame linking an upper end and a lower end within the frame of the main frame, and a panel frame composed of a plate-shaped panel attached to the entire rear of these frames.

[0283] Further, a mounting bracket for mounting the seat belt retractor is fastened to a central portion of the above-described panel frame while being engaged with the link frame, and ensures the assembly rigidity of the seat belt retractor.

[0284] In addition, the seat for a ride described in International Publication No. 2016 / 016924 is provided with a backrest frame composed of a main frame of a frame shape made of a pipe material, elastic cables that link upper and lower ends within the frame of the main frame, and elastic cables that link left and right ends in the seat width direction.

[0285] Further, a mounting bracket for mounting a seat belt retractor is mounted to the elastic cables that extend up and down within the frame of the main frame and the elastic cables that extend in the seat width direction, and ensures the light weight of the seat frame and the support of the passenger.

[0286] (Problem to be solved by the seat for a ride according to the third embodiment)

[0287] However, in the vehicle seat provided with the seat belt retractor described in Japanese Patent Application Publication No. 2017-226376 and International Publication No. 2016 / 016924, it is necessary to improve the assembly rigidity of the seat belt retractor as in Patent Document 1, and to consider the light weight of the seat frame and the support of the seated person as in Patent Document 2.

[0288] Further, on the basis of the above, a method is required that can assemble the frame with a simple configuration.

[0289] The present application was obtained in view of the above problem, and an object of the present application is to provide a vehicle seat that can improve the assembly rigidity of a seat belt retractor in a vehicle seat provided with the seat belt retractor, while ensuring the light weight of the seat frame and the good support of the seated person.

[0290] Another object of the present application is to provide a vehicle seat that can assemble the frame with a simple configuration.

[0291] The problem is solved by the following. The seat for a ride according to the following third embodiment is a vehicle seat provided with a main frame, a link frame, and an elastic support member, the main frame constituting a skeleton of a backrest portion and composed of a frame-shaped body; the link frame being disposed within the frame of the main frame and linking an upper frame portion constituting an upper portion of the main frame and a lower frame portion constituting a lower portion; the elastic support member being disposed within the frame of the main frame and linking left and right side frame portions constituting side portions of the main frame in the seat width direction, and being used to support a seated person. Further, the vehicle seat is provided with a panel bracket and a mounting bracket, the panel bracket being mounted to the upper frame portion, the link frame, and the elastic support member in the main frame, respectively; and the mounting bracket being mounted to the front of the panel bracket in order to mount a seat belt retractor that winds a seat belt, and being disposed in the seat front-rear direction in such a manner that the link frame is sandwiched between the panel bracket and the mounting bracket.

[0292] As described above, since the panel bracket is installed in the upper frame portion, the link frame, and the elastic support member in the main frame, the assembly rigidity of the panel bracket is ensured. Further, since the installation bracket for installing the seat belt retractor is installed in front of the panel bracket and is disposed in a manner of sandwiching the link frame therebetween, the assembly rigidity of the seat belt retractor can be improved.

[0293] Further, since the vehicle seat is provided with the elastic support member that links the side portions in the seat width direction of the main frame within the frame of the main frame and supports the seated person, compared with the past configuration in which the panel frame is installed in the rear of the main frame, the light weight of the seat frame and the good supportability for the seated person can be ensured.

[0294] Therefore, compared with the past, the assembly rigidity of the seat belt retractor can be improved with a simple configuration, while the light weight of the seat frame and the good supportability for the seated person can be ensured.

[0295] At this time, it is preferable that the installation bracket have a frame installation recess portion that is curved toward the link frame while being recessed in front of the panel bracket for installation along the outside of the link frame, and a frame installation end portion that is provided at an end portion of at least one of the upper and lower sides with respect to the frame installation recess portion and extends toward the link frame for installation along the outside of the link frame.

[0296] Further, it is preferable that upper and lower end flanges that extend toward the rear of the panel bracket be formed in at least the upper and lower end portions of the outer peripheral portion of the installation bracket.

[0297] According to the above configuration, since the assembly rigidity of the installation bracket can be improved, and the cross-sectional U-shaped configuration can be expected to improve the rigidity, the seat belt retractor can be more stably assembled.

[0298] At this time, it is preferable that the installation bracket be disposed on the side closer to the elastic support member in the upper and lower directions between the upper frame portion and the elastic support member.

[0299] As described above, since the installation bracket is installed in the space on the lower side closer to the elastic support member than the upper frame portion in the upper and lower directions, the assembly space of the seat belt retractor can be easily ensured. Further, since the installation bracket can also function as a reinforcement bracket, the assembly rigidity of the elastic support member can be improved and the good supportability for the seated person can be ensured.

[0300] At this time, it is preferable that an outer peripheral flange that extends toward the front of the seat and a cutout portion that is slotted in at least one corner portion be formed in the outer peripheral portion of the panel bracket.

[0301] According to the above configuration, a structure that improves the rigidity of the panel bracket while taking into consideration the assembly operability of the panel bracket and the surrounding fittings is constituted.

[0302] At this time, it is preferable that the panel bracket have a frame mounting protrusion disposed on one end side in the seat width direction that protrudes toward the link frame on the outside of the link frame for mounting to the link frame, and a bracket mounting protrusion disposed on the other end side in the seat width direction that protrudes toward the mounting bracket for mounting to the mounting bracket.

[0303] According to the above configuration, the rigidity of the portion of the panel bracket that is mounted to the link bracket and the portion of the panel bracket to which the mounting bracket is mounted is improved, while the generation of noise caused by contact of other portions with other surrounding fittings is suppressed.

[0304] At this time, it is preferable that the panel bracket have a reinforcement recess that is recessed toward the opposite side of the mounting bracket side from a portion on which the mounting bracket is mounted, and a reinforcement protrusion that protrudes toward the mounting bracket side in a region in which the reinforcement recess is formed, the reinforcement protrusion being formed at a position opposite the seat belt from the seat belt retractor.

[0305] Further, it is preferable that a guide for guiding the seat belt be mounted in the upper frame portion in a portion that overlaps the panel bracket in the seat width direction, the guide being constituted by a cable member, and that the reinforcement protrusion be disposed between the portions on which the seat belt is mounted in the seat width direction.

[0306] According to the above configuration, the rigidity of the panel bracket can be improved, and the seat belt can be stably pulled out from the seat belt retractor.

[0307] At this time, it is preferable that a support member linking portion for linking to the elastic support member be provided in a portion of the panel bracket between the mounting bracket and the lower end of the panel bracket in the vertical direction.

[0308] According to the above configuration, good support of the seated person can be ensured by the elastic support member, and improvement of the rigidity of the panel bracket in assembly can be achieved using the elastic support member.

[0309] At this time, it is preferable that the main frame be constituted by a pipe material, a plurality of pairs of headrest guides for supporting headrest supports be mounted to portions of the front or rear of the upper frame portion that form substantially flat faces, and the panel bracket be mounted in the upper frame portion in a manner that is sandwiched between the plurality of pairs of headrest support guides in the seat width direction.

[0310] 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.

[0311] (Effects of the Vehicle Seat According to the Third Embodiment)

[0312] 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.

[0313] 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.

[0314] 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.

[0315] 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.

[0316] 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.

[0317] 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.

[0318] 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.

[0319] 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.

[0320] Below, refer to Figures 24-29 A third embodiment of the present invention will be described.

[0321] The present embodiment is a vehicle seat-related invention, and is a vehicle seat provided with a main frame, a link frame, and an elastic support member. The main frame forms a skeleton of a backrest portion and is composed of a pipe material. The link frame is disposed in a frame of the main frame and links an upper frame portion and a lower frame portion of the main frame. The elastic support member is disposed in the frame of the main frame and links side frame portions on the left and right in a seat width direction of the main frame and is used to support a seated person. The vehicle seat is characterized by being provided with a panel bracket and a mounting bracket. The panel bracket is mounted to the upper frame portion, the link frame, and the elastic support member, respectively. The mounting bracket is mounted to a front of the panel bracket in order to mount a seat belt retractor and is disposed in a manner of sandwiching the link frame between the panel bracket and the mounting bracket in a front-rear direction of the seat.

[0322] Further, with respect to a seat back of a vehicle seat, a side on which a seated person is seated is a front side.

[0323] The vehicle seat S200 of the third embodiment is a rear seat such as a rear seat corresponding to a rear seat of a vehicle.

[0324] As shown in Figure 24 , the vehicle seat S200 is mainly composed of a seat main body, a seat belt device 204, a support leg 230, a support base 240, and a switching device 250. As shown in Figure 24 , the seat main body is provided with a seat back 201, a seat cushion 202, and a headrest 203. The seat belt device 204 is mounted to an inside of the seat back 201 and is used to restrain an upper body of a seated person. As shown in Figure 25 , the support leg 230 is mounted between the seat cushion 202 and a vehicle body floor and supports the seat cushion 202. The support base 240 rotatably supports the seat back 201. The switching device 250 is mounted to an outside portion in a seat width direction of the seat back 201 and is used to switch the seat main body from a use state to a storage state.

[0325] A recessed storage floor, not shown, which is formed at a position lower than the vehicle body floor, is provided on a front side of the vehicle seat S200.

[0326] The vehicle seat S200 is a seat which is configured to be able to at least take two forms of a use state in which a passenger can be seated and a storage state in which the seat main body is stored in the storage floor.

[0327] Specifically, when the passenger pulls the operation lever 252 shown in Figure 24 , the seat main body is folded forward and downward, and the vehicle seat S200 is switched from the use state to the storage state in which the seat main body is stored in the storage floor. In addition, the passenger recovers the seat main body from the storage state to the use state by manually pulling the seat main body upward.

[0328] As shown in Figure 24As shown, the seat back 201 is a backrest portion that supports the back of the passenger from the rear, and is configured by placing a cushion 201a on a backrest frame 210 shown as a skeleton and covering it with a skin 201b. Figure 25 The backrest frame 210 shown as a skeleton is configured by placing a cushion 201a on a backrest frame 210 shown as a skeleton and covering it with a skin 201b.

[0329] The seat cushion 202 is a seating portion that supports the passenger from below, and is configured by placing a cushion 202a on a cushion frame 220 shown in Figure 25 The cushion frame 220 shown in is configured by placing a cushion 202a on a cushion frame 220 shown in and covering it with a skin 202b from above the cushion 202a.

[0330] The headrest 203 is a head portion that supports the head of the passenger from the rear, and is configured by placing a cushion 203a on a headrest pillar not shown as a core material and covering it with a skin 203b.

[0331] The seat belt device 204 is mainly configured by a seat belt 204a, a belt retractor 204b, and a belt guide 204c, as shown in Figure 24 The seat belt 204a restrains the upper body of the seated person, as shown in Figure 25 The belt guide 204c is installed on the backrest frame 210 at a position higher than the belt retractor 204b, as shown in

[0332] In addition, a belt tongue not shown is installed at the top end portion of the seat belt 204a, and is configured to be detachably connected to a belt buckle not shown.

[0333] The backrest frame 210 is configured by a substantially rectangular frame-shaped body as a skeleton of the seat back 201, as shown in Figure 25 The backrest frame 210 is configured by a substantially rectangular frame-shaped body as a skeleton of the seat back 201, as shown in

[0334] In addition, a panel bracket 214 is installed on the upper frame portion 211a, the link frame 212, and the elastic support member 213, and a mounting bracket 215 is installed on the front of the panel bracket 214 and is used to mount the belt retractor 224b.

[0335] A plurality of substantially flat surfaces are formed in the front of the upper frame portion 211a in the main frame 211 at specific intervals in the seat width direction. A pair of headrest guides 203c for supporting not-illustrated headrest supports are respectively attached to portions where the substantially flat surfaces are formed.

[0336] In the main frame 211, a reinforcing bracket 216 that links the lower end portion of the side frame portion 211c and the left end portion of the lower frame portion 211b is attached by welding.

[0337] In the main frame 211, a pair of vehicle body link brackets 217 for linking with the support base 240 are attached to lower portions in the outer side surfaces of the left and right side frame portions 211c, 211d. In addition, a switching device 250 for switching the seat main body from the use state to the storage state is attached to an upper portion in the outer side surface of the side frame portion 211c.

[0338] As shown in Figs. 1 and 2, the seat 200 includes a main frame 211 that supports a seat main body 220, a backrest frame 210 that supports a backrest 230, a support base 240 that supports the main frame 211, and a link frame 212 that links the backrest frame 210 and the support base 240. Figures 25-27A

[0339] In addition, as shown in Figs. 1 and 2, the link frame 212 is attached to the right portion opposite the left portion where the reinforcing bracket 216 is attached in the seat width direction. Therefore, the rigidity of the backrest frame 210 is uniformly improved in the seat width direction. Figure 25

[0340] As shown in Figs. 1 and 2, the elastic support member 213 is an elastic spring that supports the backrest portion of a seated person, and a plurality of the elastic support members 213 are arranged at specific intervals in the up-down direction while being erected on the left and right side frame portions 211c, 211d. Figures 25-27A In detail, the elastic support member 213 is formed in a substantially U shape that is elongated in the seat width direction, as shown in Figs. 1 and 2, and is composed of a spring main portion 213a that extends substantially linearly in the seat width direction, and left and right spring end portions 213b, 213c that are continuous from both end portions of the spring main portion 213a on the outside in the seat width direction and extend downward.

[0341] Figure 26

[0342] The left and right spring end portions 213b, 213c respectively extend downward along the inner side surfaces of the left and right side frame portions 211c, 211d, and are laser-welded in a state where they abut against the inner side surfaces of the side frame portions 211c, 211d.

[0343] As shown in Figs. 1 and 2, the elastic support member 213 is an elastic spring that supports the backrest portion of a seated person, and a plurality of the elastic support members 213 are arranged at specific intervals in the up-down direction while being erected on the left and right side frame portions 211c, 211d.​​​​Figure 27A As shown in FIG. 2B , the spring main body 213 a extends in a direction intersecting the connection frame 212 (orthogonal direction), and a portion thereof abuts against the rear surface of the connection frame 212 , and the abutting portion is joined by welding.

[0344] 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.

[0345] 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.

[0346] 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.

[0347] In addition, if Figures 25-27A 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.

[0348] 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.

[0349] like Figure 29 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 27A The bracket of the seat belt arrangement 204 shown also serves, in addition, as a bracket for the reinforced backrest frame 210 .

[0350] 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.

[0351] 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.

[0352] In the panel bracket 214, at a portion above the portion where the mounting bracket 215 is mounted, as shown in FIG. Figure 26 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).

[0353] 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).

[0354] 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.

[0355] In the reinforcing recess 214a, both end portions that are further outward in the seat width direction than the portion forming the reinforcing protrusion 214b are formed. Figure 27A 、 Figure 27A As shown, a seat belt guide 204c composed of a substantially U-shaped cable member is installed.

[0356] 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.

[0357] 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.

[0358] like Figure 27A 、 Figure 27B As shown, the reinforcing protrusion 214b is formed between both end portions of the belt guide 204c in the seat width direction and extends in the up-down direction.

[0359] 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.

[0360] 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.

[0361] 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.

[0362] 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 .

[0363] 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.

[0364] 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.

[0365] 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.

[0366] 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 .

[0367] like Figures 26-28A 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.

[0368] 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.

[0369] like Figure 26 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.

[0370] Therefore, the rigidity of the panel bracket 214 can be improved, and interference with other components can be avoided.

[0371] like Figure 27AAs shown in FIGS. 11 and 12, the mounting bracket 215 is a substantially rectangular plate-like member elongated in the seat width direction, and is a bracket for mounting the seat belt retractor 204b to the back frame 210, and also is a bracket for reinforcing the back frame 210.

[0372] The left side portion of the mounting bracket 215 in the seat width direction is configured in a substantially flat shape, and is relatively mounted to the front face of the panel bracket 214 in the front-rear direction.

[0373] In detail, the mounting bracket 215 is mounted with the panel bracket 214 (bracket mounting protrusion 214e) at a lower portion closer to the elastic support member 213 than the upper frame portion 214 in the up-down direction.

[0374] As shown in FIGS. 11 and 12, the right side portion of the mounting bracket 215 is configured in a curved shape curved along the outer peripheral face of the link frame 212, and abuts against the front face of the link frame 212 in a manner to cover the front face, and the abutment portion is joined by arc welding. Figure 27A Figure 28B In detail, the right side portion of the mounting bracket 215 is formed with a frame mounting recessed portion 215a curved and recessed toward the link frame 212, and frame mounting end portions 215b, 215c provided at an upper position and a lower position, respectively, than the frame mounting recessed portion 215a, and protruding toward the link frame 212, in order to be mounted along the outer peripheral face of the link frame 212.

[0375] In detail, the right side portion of the mounting bracket 215 is formed with a frame mounting recessed portion 215a curved and recessed toward the link frame 212, and frame mounting end portions 215b, 215c provided at an upper position and a lower position, respectively, than the frame mounting recessed portion 215a, and protruding toward the link frame 212, in order to be mounted along the outer peripheral face of the link frame 212.

[0376] In detail, the right side portion of the mounting bracket 215 is formed with a frame mounting recessed portion 215a curved and recessed toward the link frame 212, and frame mounting end portions 215b, 215c provided at an upper position and a lower position, respectively, than the frame mounting recessed portion 215a, and protruding toward the link frame 212, in order to be mounted along the outer peripheral face of the link frame 212.

[0377] In detail, the right side portion of the mounting bracket 215 is formed with a frame mounting recessed portion 215a curved and recessed toward the link frame 212, and frame mounting end portions 215b, 215c provided at an upper position and a lower position, respectively, than the frame mounting recessed portion 215a, and protruding toward the link frame 212, in order to be mounted along the outer peripheral face of the link frame 212. Figure 27A Figure 29 In detail, the right side portion of the mounting bracket 215 is formed with a frame mounting recessed portion 215a curved and recessed toward the link frame 212, and frame mounting end portions 215b, 215c provided at an upper position and a lower position, respectively, than the frame mounting recessed portion 215a, and protruding toward the link frame 212, in order to be mounted along the outer peripheral face of the link frame 212.

[0378] According to the above configuration, the assembly rigidity of the mounting bracket 215 with respect to the panel bracket can be improved, and it is expected that the rigidity is improved by the cross-sectional U-shaped configuration.

[0379] In detail, the right side portion of the mounting bracket 215 is formed with a frame mounting recessed portion 215a curved and recessed toward the link frame 212, and frame mounting end portions 215b, 215c provided at an upper position and a lower position, respectively, than the frame mounting recessed portion 215a, and protruding toward the link frame 212, in order to be mounted along the outer peripheral face of the link frame 212. Figure 27A In detail, the right side portion of the mounting bracket 215 is formed with a frame mounting recessed portion 215a curved and recessed toward the link frame 212, and frame mounting end portions 215b, 215c provided at an upper position and a lower position, respectively, than the frame mounting recessed portion 215a, and protruding toward the link frame 212, in order to be mounted along the outer peripheral face of the link frame 212.​​

[0380] 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.

[0381] like Figure 29 As shown, the seatbelt retractor 204b is assembled into the retractor assembly portion 215e as a box-shaped unit.

[0382] 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.

[0383] In the above configuration, the seat belt guide 204c is Figure 25 、 Figure 25 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.

[0384] 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.

[0385] Therefore, the seat belt 204a can be stably arranged in the seat front-rear direction.

[0386] 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.

[0387] 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.

[0388] 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 .

[0389] like Figure 25As shown, the vehicle body connecting bracket 217 is composed of a sheet metal member extending in the up-down direction, and an upper portion of the vehicle body connecting bracket 217 is attached to the seat width direction outer side surface of the main frame 211 (side frame portion 211c), and a lower end portion thereof is attached to the inner side surface of the support base 240 in a manner rotatable relative thereto.

[0390] In detail, 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.

[0391] As shown, the upper end portion of the vehicle body connecting bracket 217 is sandwiched between the backrest frame 210 (main frame 211) and the cushion frame 220 in the seat width direction. Figure 25

[0392] A seat rotation shaft 218, which is supported by the support base 240 in the seat width direction, is provided at the lower end portion of the vehicle body connecting bracket 217 on the left side, and an inclination device 219, which rotatably connects the backrest frame 210 to the support base 240, is attached to the lower end portion of the vehicle body connecting bracket 217 on the right side.

[0393] The inclination device 219 is a publicly known device, as shown, and is attached to the seat width direction outer side surface of the vehicle body connecting bracket 217 on the right side. Figure 25

[0394] The inclination device 219 is provided with a coil spring, not shown, which rotates the backrest frame 210 about the seat rotation shaft 218 to the front side and applies a force to the stowed state.

[0395] One end portion of the coil spring is caught to the backrest frame 210 side, and the other end portion is caught to the support base 240 side.

[0396] By operating the lever 252, the locked state of the seat backrest 201 is released, the inclination device 219 is operated, and the backrest frame 210 can be rotated to the front side and folded to the vehicle floor side by the force of the coil spring.

[0397] The cushion frame 220 is composed of a substantially rectangular frame-shaped body that is a skeleton of the seat cushion 202, as shown, and 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 portions of the side frames 221, a central connecting pipe 223 connecting the substantially central portions of the side frames in the front-rear direction, and a disc-shaped frame 224 that is a plate-shaped frame connecting the front connecting pipe 222 and the central connecting pipe 223. Figure 25

[0398] ​​​The side frames 221 are formed of plate members of substantially U-shaped cross section extending in the front-rear direction of the seat, and the front portions thereof are connected to the front connecting pipes 222, and the rear portions thereof are attached to the outer side surfaces of the main frame 211 via the body attachment brackets 217.

[0399] Further, a cushion rotating device 226 is attached to the rear end portion of the side frame 221 on the left side, and the cushion rotating device 226 rotatably connects the cushion frame 220 with respect to the back frame 210 about a cushion rotating shaft 227.

[0400] As shown in Figure 25 , the front connecting pipe 222 is formed of a substantially C-shaped pipe member, and a foot rotating device 228 is attached to the inner side surface thereof in the seat width direction, and the foot rotating device 228 rotatably connects the support foot 230 with respect to the cushion frame 220 about a foot rotating shaft 229.

[0401] As shown in Figure 24 , the support foot 230 is a substantially C-shaped pipe member that supports the seat cushion 202, and has foot body portions 231 arranged on the left and right sides, and a foot connecting portion 232 that connects the lower end portions of the foot body portions 231.

[0402] The upper end portions of the foot body portions 231 are connected to the substantially central portions in the front-rear direction of the cushion frame 220 on the inner side surfaces thereof on the left and right sides. Further, the central portions in the seat width direction of the foot connecting portion 232 are detachably held by a not-shown foot holding member provided on the floor of the vehicle body.

[0403] The upper end portion of the support foot v30 protrudes further toward the front of the seat than the lower end portion of the support foot 230, and is inclined upward and forward from the lower end portion of the support foot 230 toward the upper end portion of the support foot 230.

[0404] The support base 240 is a member that supports the seat back 201, and is formed of a substantially L-shaped plate member elongated in the front-rear direction, as shown in Figure 25 , and is arranged on the side in the seat width direction and is connected to the floor of the vehicle body.

[0405] The support base 240 is mainly formed of a connecting wall portion 241 connected to the floor of the vehicle body, and an outer wall portion that is bent upward from the inner side end portions of the connecting wall portion 241 on the left and right sides and extends and is connected to the lower end portion of the body attachment bracket 217 via the seat rotating shaft 218.

[0406] The switching device 250 is a known device that switches the vehicle seat S200 from the use state to the storage state, and is attached to the upper portion of the back frame 210, as shown in Figure 25 , Figure 25 .

[0407] The switching device 250 is provided with an engagement hook 251 that is detachably provided to an unillustrated engagement striker that is a part of a vehicle body member, and an operation lever 252 that moves the tip end portion of the engagement hook 251 in the seat up-down direction and is used to engage and lock the engagement hook 251 with the engagement striker.

[0408] The engagement hook 251 is linked to the operation lever 252 by an unillustrated cable, and is configured so that the engagement hook 251 can be switched between a lockable state in which the engagement hook 251 can be locked with the engagement striker and an unlockable state in which the engagement hook 251 cannot be locked with the engagement striker, by the operation lever 252.

[0409] By the passenger operating the operation lever 252, the vehicle seat S200 releases the locked state of the backrest frame 210 from the use state by the switching device 250. Along with the release of the locked state of the seat backrest 201, Figure 25 The illustrated tilting device 219 operates, and specifically, by the urging force of an unillustrated coil spring, the backrest frame 210 can be rotated and folded toward the front side.

[0410] In addition, along with the rotating operation of the backrest frame 210, Figure 25 The illustrated cushion rotating device 226 and foot rotating device 228 each operate, and specifically, by the urging force of an unillustrated coil spring, the support foot 230 can be rotated and folded toward the cushion frame 220 side about the foot rotating shaft 229.

[0411] By the above series of operations, the seat main body is housed in the housing floor, and the vehicle seat S200 is switched from the use state to the housed state.

[0412] Furthermore, if it is desired to restore the vehicle seat S200 from the housed state to the use state, the passenger raises the seat main body upward by hand against the urging force of an unillustrated coil spring or the like, engages the engagement hook 251 of the switching device 250 with the engagement striker, and thereby switches the backrest frame 210 to the locked state.

[0413] <Other Embodiments>

[0414] In the above-described third embodiment, the vehicle seat S200 is formed as a rear seat of a vehicle, but is not particularly limited thereto, and can be a front seat of a vehicle, or a middle seat in a vehicle having three rows of seats.

[0415] In the above-described third embodiment, the vehicle seat S200 is a seat that can be arranged in the use state and the housed state, but is not particularly limited thereto, and for example, can be a seat that can be arranged in the use state, the housed state, and a flipped-up state in which the seat main body is jumped upward.

[0416] In addition, a storage floor is formed in front of the seat S200, but is not particularly limited, and a storage floor can also be formed behind the seat S200.

[0417] In the above-described third embodiment, as shown in FIG. 2, the support base 240 is directly fixed to the vehicle floor, but is not particularly limited, and for example, can be indirectly fixed to the vehicle floor by a guide rail device that supports the seat main body so as to be movable in the front-rear direction. ​

[0418] In the above-described third embodiment, laser welding or arc welding is used when assembling each frame or when assembling the frame and the bracket, but is not particularly limited, and various welding methods such as spot welding can also be used.

[0419] In the above-described third embodiment, as shown in FIG. 2, the upper portion of the vehicle body connecting bracket 217 is attached to the backrest frame 210, and the lower portion thereof is attached to the support base 240, but is not particularly limited, and can be changed. ​

[0420] For example, the lower portion of the vehicle body connecting bracket 217 can be attached to the cushion frame 220, or can be attached to a guide rail device provided in another manner.

[0421] The above-described third embodiment has been described using a stowable seat for a vehicle for a car as a specific example, but is not limited thereto, and can be used as a seat for a vehicle for a train, a bus, or the like, or as a seat for a passenger for an airplane, a ship, or the like.

[0422] The third embodiment has been described mainly with respect to the seat S200 to which the present application relates.

[0423] However, the above-described third embodiment is merely an example for facilitating understanding of the present application, and is not intended to limit the present application. That is, with respect to the shapes, sizes, arrangements, and the like of the components described below, the present application includes equivalents thereof without departing from the gist thereof, and the present application includes changes and modifications thereto.

[0424] In particular, with respect to the shapes, arrangements, and configurations of the backrest frame 210, the panel bracket 214, and the mounting bracket 215, the contents described in the above-described embodiments are merely examples, and are not intended to limit the present application.

[0425] Symbol Explanation

[0426] S Seat for a vehicle

[0427] S1 Seat cushion

[0428] S11 Cushion pad

[0429] S12 Decorative cover​​

[0430] S2 seat back

[0431] S21 Cushion

[0432] S22 decorative cover

[0433] S3 headrest

[0434] S31 Cushion

[0435] S32 decorative cover

[0436] F, FX seat frame

[0437] 1. 1X seat cushion frame

[0438] 1a Support foot

[0439] 2. 2X seat back frame

[0440] 3-tube frame

[0441] 3a Side frame

[0442] 3b Upper frame

[0443] 3c Lower frame

[0444] 4 Backrest

[0445] W Cable Frame

[0446] 10 Mounting bracket

[0447] 11. Outer side

[0448] 11a Opening

[0449] 11b Mounting hole

[0450] 12 front

[0451] 13 Back

[0452] 13a convex part

[0453] 14 above

[0454] 14a Recessed portion (1st recessed portion)

[0455] 14b Slit

[0456] 15 below

[0457] 15a recess (2nd recess)

[0458] 15b Slit

[0459] 20, 20X reinforcement bracket

[0460] 21, 21X base portion

[0461] 21a, 21Xa upper end portion

[0462] 21b, 21Xb lower end portion

[0463] 22, 22X front end portion

[0464] 23, 23X rear end portion

[0465] 24a, 24Xa reinforcing rib (upper side reinforcing rib)

[0466] 24b, 24Xb reinforcing rib (lower side reinforcing rib)

[0467] 30 locking unit

[0468] 31 inner side surface

[0469] 32 mounting hole

[0470] 33 locking piece

[0471] 40 support bracket

[0472] 41 locking release member

[0473] 42 front portion

[0474] 43 rear portion

[0475] 50 cable member

[0476] 51 first extension portion

[0477] 51a first end portion

[0478] 51b first curved portion

[0479] 52 second extension portion

[0480] 52a second end portion

[0481] 52b second curved portion

[0482] 53 connecting portion

[0483] 60X cover member

[0484] S100 vehicle seat

[0485] 101 seat back

[0486] 101a, 102a, 103a cushion material

[0487] 101b, 102b, 103b skin material

[0488] 102 seat cushion

[0489] 103 headrest

[0490] 103c headrest guide

[0491] 110 back frame

[0492] 111 main frame

[0493] 111a upper frame portion

[0494] 111b lower frame portion

[0495] 111c, 11d side frame portions

[0496] 112 connecting frame

[0497] 113 panel frame

[0498] 113a frame mounting protrusion

[0499] 113b reinforcing recess

[0500] 114 retractor bracket

[0501] 115 skin suspension cable

[0502] 115a cable main body portion

[0503] 115b cable extension portion

[0504] 115c cable end portion

[0505] 116 reinforcing bracket

[0506] 116a side wall portion

[0507] 116b front wall portion

[0508] 116c rear wall portion

[0509] 116d cutout portion

[0510] 116e stepped uneven portion

[0511] 117 mounting bracket

[0512] 117a side wall portion

[0513] 117b front wall portion

[0514] 117c rear wall portion

[0515] 117d curved portion

[0516] 117e cutout portion

[0517] 118 seat rotation shaft

[0518] 119 tilting device

[0519] 120 cushion frame

[0520] 121 side frame

[0521] 122 front connecting pipe

[0522] 123 central connecting pipe

[0523] 124 disc frame

[0524] 126 cushion rotation device

[0525] 127 cushion rotation shaft

[0526] 128 foot rotation device

[0527] 129 foot rotation shaft

[0528] 130 support foot

[0529] 131 foot main body portion

[0530] 132 foot connecting portion

[0531] 140 support base

[0532] 141 connecting wall portion

[0533] 142 outer wall portion

[0534] 150 switching device

[0535] 151 operation lever

[0536] 160, 160' cable member

[0537] 161 cable main body portion

[0538] 162 inner end portion

[0539] 163 outer end portion

[0540] S200 vehicle seat

[0541] 201 seat back

[0542] 201a, 202a, 203a cushioning material

[0543] 201b, 202b, 203b skin material

[0544] 202 seat cushion

[0545] 203 headrest

[0546] 203c headrest guide

[0547] 204 seat belt device

[0548] 204a seat belt

[0549] 204b belt retractor

[0550] 204c belt guide

[0551] 210 back frame

[0552] 211 main frame

[0553] 211a upper frame portion

[0554] 211b lower frame portion

[0555] 211c, 211d side frame portions

[0556] 212 connecting frame

[0557] 213 elastic support member (elastic spring)

[0558] 213a spring body portion

[0559] 213b, 213c spring end portions

[0560] 213d bent portion

[0561] 214 panel bracket

[0562] 214a reinforcing recess

[0563] 214b reinforcing protrusion

[0564] 214c frame mounting protrusion

[0565] 214d support member connecting portion

[0566] 214e bracket mounting protrusion

[0567] 214f outer peripheral flange

[0568] 214g cutout portion

[0569] 215 mounting bracket

[0570] 215a frame mounting recess

[0571] 215b, 215c frame mounting end portions

[0572] 215d peripheral flange

[0573] 215e retractor assembly

[0574] 216 reinforcing bracket

[0575] 217 body connecting bracket

[0576] 218 seat rotating shaft

[0577] 219 tilting device

[0578] 220 cushion frame

[0579] 221 side frame

[0580] 222 front connecting pipe

[0581] 223 central connecting pipe

[0582] 224 disc frame

[0583] 226 cushion rotating device

[0584] 227 cushion rotating shaft

[0585] 228 foot rotating device

[0586] 229 foot rotating shaft

[0587] 230 supporting foot

[0588] 231 foot main body

[0589] 232 foot connecting portion

[0590] 240 supporting base

[0591] 241 connecting wall portion

[0592] 242 outer wall portion

[0593] 250 switching device

[0594] 251 engaging hook

[0595] 252 operating lever

Claims

1. A passenger seat having a seat back that is tiltable relative to a seat cushion, characterized in that: The seat back comprises a seat back frame and a locking unit; The locking unit engages with an engaged portion provided on the vehicle body and locks the tilt of the seat back frame; 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 side frame and the mounting bracket are connected by a reinforcing bracket; The reinforcement bracket includes a front end portion and a rear end portion in the front-rear direction of the vehicle seat; The front end portion is mounted on the front of the mounting bracket, and the rear end portion is mounted on the side frame; An extended reinforcing rib is formed between the front end portion and the rear end portion; 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; In the front-rear direction of the vehicle seat, the distance between the upper reinforcing rib and the lower reinforcing rib gradually increases from the front end portion toward the rear end portion.

2. 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 on the first recess and the second recess; The upper reinforcing rib extends between the upper end portion of the front end portion and the upper end portion of the rear end portion; The lower reinforcing rib extends between a lower end portion of the front end portion and a lower end portion of the rear end portion.

3. The vehicle seat according to claim 2, wherein: The mounting bracket includes slits on the upper surface and the lower surface.

4. The vehicle seat according to claim 3, wherein: The mounting bracket includes a rear surface disposed rearwardly of the vehicle seat in the front-rear direction; 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.

5. The vehicle seat according to claim 2, 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.

6. The vehicle seat according to claim 2, wherein: The mounting bracket is mounted on the side frame by welding in the first recess and the second recess.

Images