Vehicle seats

Abstract

To provide a vehicle seat having a seat back tiltable relative to a seat cushion, which can suppress interference with a lock unit that locks the tilting of a seat back frame with a compact configuration even when components such as a side airbag module are arranged around the seat back frame. [Solution] A vehicle seat S equipped with a seat back S2 that can tilt relative to a seat cushion S1, the seat back S2 comprising a seat back frame 2 and a lock unit 30 that engages with an engaging portion provided on the vehicle body to lock the tilting of the seat back frame 2, the seat back frame 2 having a side frame 3 arranged on the side of the vehicle seat, the side frame 3 comprising a first frame portion 3a extending in the vertical direction of the vehicle seat and an inclined portion 3b that inclines inward in the width direction of the vehicle seat from the upper end of the first frame portion 3a, and the lock unit 30 is provided inside the first frame portion 3a in the width direction of the vehicle seat.

Description

[Technical field]

[0001] The present invention relates to a vehicle seat having a seat back that is tiltable relative to a seat cushion, and more particularly to a vehicle seat having a lock unit that engages with an engaged portion provided on a vehicle body to lock the tilting of the seat back. [Background technology]

[0002] 2. Description of the Related Art In a vehicle seat in which a seat back is configured to be tiltable in a direction toward a seat cushion, a technique is known in which a lock unit is attached to a seat back frame to lock the tilting of the seat back.

[0003] For example, Patent Document 1 describes a seat back frame in which brackets are provided at the corners of the sides of a frame member formed by bending a pipe into a frame shape, and a lock unit that can be engaged and disengaged with a striker supported on the vehicle body is attached. When an occupant sits down, the lock unit is engaged with the striker, and the bracket and seat back frame are fixed to the vehicle body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6268294 Summary of the Invention [Problem to be solved by the invention]

[0005] Side airbags are sometimes positioned across the width of the seat to protect the occupants, but if the side airbag module interferes with the locking unit when it is positioned, the airbag will not deploy properly. Therefore, even when a side airbag module is used, it is necessary to position the locking unit appropriately.

[0006] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a vehicle seat that is compact in configuration and capable of suppressing interference with the locking unit, even when components such as a side airbag module are arranged around the seatback frame. [Means for solving the problem]

[0007] The above-mentioned problem is solved by the vehicle seat of the present invention, which provides a vehicle seat having a seat back that is tiltable relative to a seat cushion, the seat back having a seat back frame and a lock unit that engages with an engaged portion provided on a vehicle body to lock the tilting of the seat back frame, the seat back frame having a side frame disposed on a side of the vehicle seat, the side frame having a first frame portion extending in the up-down direction of the vehicle seat and an inclined portion inclined inwardly in the width direction of the vehicle seat from an upper end of the first frame portion, a bracket for mounting the lock unit is attached to the inclined portion, and the lock unit is provided at a position facing the inclined portion. A wire member for attaching an unlocking member for unlocking the lock unit is attached to the upper surface of the bracket. This problem is solved by:

[0009] In the above vehicle seat, a side airbag module is provided, and the lock unit is disposed above the inclined portion. In the sheet width direction It is preferable that the seat back frame and the side airbag module are provided between the seat back frame and the side airbag module.

[0010] In the above vehicle seat, the lock unit is provided on the first frame portion. and the bracket of Sheet width direction outer edge More inward Good placement.

[0012] In the above vehicle seat, the lower end of the wire member is The upper surface of the bracket Same as one side It is preferable that it is placed at the top.

[0013] In the above vehicle seat, the bracket is beforeThe first frame part To It is preferable that it is welded.

[0014] In the above vehicle seat, the bracket is At a position above the center in the vertical direction It is preferable that it is welded.

[0015] In the above vehicle seat, The upper surface of the bracket is disposed at a position higher than the upper surface of the lock unit. Good 。

[0016] In the above vehicle seat, The above It is preferable that the locking mechanism has an unlocking unit, the locking unit and the unlocking member are connected by a cable, and a connection portion between the locking unit and the cable is provided on the outside of the inclined portion. [Brief description of the drawings]

[0019] [Figure 1] 1 is an external view of a vehicle seat according to an embodiment of the present invention; [Diagram 2] 1 is an external view of a seat frame of a vehicle seat according to an embodiment of the present invention; [Diagram 3] 4 is a partial enlarged view showing a structure around a lock unit of a seat frame according to an embodiment of the present invention. FIG. [Figure 4] 4 is a partial enlarged view showing a structure around a lock unit of a seat frame according to an embodiment of the present invention. FIG. [Diagram 5] 4 is a partial enlarged view showing a structure around a lock unit of a seat frame according to an embodiment of the present invention. FIG. [Figure 6] FIG. 2 is a front view of an outer bracket of the vehicle seat according to one embodiment of the present invention. [Figure 7] 2 is a side view of an outer bracket of the vehicle seat according to the embodiment of the present invention. FIG. [Figure 8] FIG. 2 is a front view of an inner bracket of the vehicle seat according to the embodiment of the present invention. [Figure 9]1 is an external view of an inner bracket of a vehicle seat according to an embodiment of the present invention. FIG. [Figure 10] 1 is a partial exploded view of a seat frame of a vehicle seat according to an embodiment of the present invention. [Figure 11] 4 is a side view showing a structure around a lock unit of a seat frame according to an embodiment of the present invention. FIG. [Figure 12] 4 is a side view showing a structure around a lock unit of a seat frame according to an embodiment of the present invention. FIG. [Figure 13] 1 is a schematic diagram showing a state in which a side airbag module is attached to a vehicle seat according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle seat according to an embodiment of the present invention (hereinafter, referred to as the present embodiment) will be described below with reference to FIGS. 1 to 13, taking a vehicle seat mounted in a vehicle as an example.

[0021] The embodiment described below is merely an example for facilitating understanding of the present invention, and is not intended to limit the present invention. In other words, the shapes, dimensions, arrangements, and other aspects of the components described below may be modified or improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.

[0022] In this specification, the terms indicating directions are defined as shown in FIG. 1. Specifically, in the following description, the "front-rear direction" means the front-rear direction as seen by a person sitting in the vehicle seat, and is the direction that coincides with the vehicle's traveling direction. The "seat width direction" means the width direction of the vehicle seat, and coincides with the left-right direction as seen by a person sitting in the vehicle seat. Additionally, the "up-down direction" means the height direction of the vehicle seat, and coincides with the up-down direction as seen by the vehicle seat from the front.

[0023] [1. Main components of vehicle seat S] The vehicle seat S of this embodiment is, for example, a rear seat corresponding to a seat on the left rear side of a vehicle. The vehicle seat S according to this embodiment has an appearance as shown in Fig. 1. Note that in Fig. 1, a part of the vehicle seat S is shown with a trim cover removed for convenience of illustration.

[0024] The vehicle seat S has as its main components a seat cushion S1 that serves as a seating portion that supports the buttocks of a seated person, a seat back S2 that serves as a backrest that supports the back of the seated person, and a headrest S3 that is disposed on the upper portion of the seat back S2 and supports the head of the seated person. The seat back S2 is rotatably supported by a support base (not shown).

[0025] The vehicle seat S can be moved from a usage state in which an occupant can sit to a storage state in which the seat cushion S1, the seat back S2, and the headrest S3 (hereinafter referred to as the seat body) are stored in the storage floor. Specifically, by pulling an operating lever (an unlocking member 41 described later) from the usage state, the vehicle seat S is switched to a storage state in which the seat back S2 and the headrest S3 are tilted toward the seat cushion S1 and folded, and stored in the storage floor. Also, the vehicle seat S can be returned to the usage state by the occupant manually lifting the seat body upward from the storage state.

[0026] The seat cushion S1 is constructed by placing a cushion pad S11 on a seat cushion frame 1, which is the framework shown in Fig. 2, and further covering the cushion pad S11 with a trim cover S12. The seat back S2 is constructed by placing a cushion pad S21 on a seat back frame 2, which is the framework shown in Fig. 2, and covering it with a trim cover S22. The headrest S3 is formed by disposing a cushion pad S31 on a core material (not shown) and covering it with a trim cover S32. The cushion pads S11, S21, and S31 are made of elastic cushion materials such as urethane foam, and the trim covers S12, S22, and S32 are made of synthetic leather, cloth, or the like, and are formed by sewing multiple skin materials.

[0027] [2. Overview of seat frame] First, an overview of the configuration of the seat frame F will be described with reference to Fig. 2. Fig. 2 illustrates the seat frame F of the left seat of the vehicle seat S shown in Fig. 1. As shown in Fig. 2, the seat frame F is mainly composed of a seat cushion frame 1 and a seat back frame 2. The seat cushion frame 1 forms the framework of the sitting portion of the vehicle seat S, and the seat back frame 2 forms the framework of the backrest portion of the vehicle seat S.

[0028] The seat cushion frame 1 has a rectangular frame-like external shape when viewed from above, as shown in Fig. 2. The seat cushion frame 1 mainly includes side frames that form the ends in the seat width direction, and a pan frame that forms the front end of the seat cushion frame 1. The seat cushion frame 1 has support legs 1a, and in a usage state in which an occupant can sit, the support legs 1a are engaged and fixed to a support base (not shown) as shown in Fig. 1.

[0029] The seatback frame 2 is a roughly rectangular frame-like body formed by bending a metal pipe member, and as shown in FIG. 2, is composed of side frames 3 and 4 arranged spaced apart on the left and right and extending in the longitudinal direction (the vertical direction of the seat), an upper frame 5 connecting the upper ends of the side frames 3 and 4, and a lower frame 6 connecting the lower ends of the side frames 3 and 4.

[0030] As shown in FIG. 2, the side frame 3, which will be located on the outside of the vehicle body, has a first frame portion 3a extending in the vertical direction of the seat, and an inclined portion 3b inclined inward in the seat width direction from the upper end of the first frame portion 3a.

[0031] A plurality of substantially flat surfaces are formed at predetermined intervals in the seat width direction on the front surface of the upper frame 5. A pair of pillar support parts for supporting a headrest pillar (not shown) are attached to each of the portions where these substantially flat surfaces are formed. A headrest pillar (not shown) is inserted into the pillar support parts, and the headrest S3 is attached thereto.

[0032] 2, the seatback frame 2 includes a plurality of wire frames W that are installed between the side frames 3 and 4 in the seat width direction. In the seatback frame 2, an upper frame 5 and a lower frame 6 are connected by a connecting frame 8.

[0033] [3. Lock unit installation method] The vehicle seat S is provided with a lock unit 30 that locks the tilting of the seat back frame 2 (seat back S2). Hereinafter, the attachment of the lock unit 30 to the seat frame F will be described with reference to Figs.

[0034] Figures 3 to 5 are partial enlarged views showing the structure around the lock unit 30 attached to the seat frame F, with Figure 3 showing the structure around the lock unit 30 as viewed diagonally from the front of the seat, Figure 4 showing the structure around the lock unit 30 as viewed from the front of the seat, and Figure 5 showing the structure around the lock unit 30 as viewed from the rear of the seat. For the sake of explanation, the lock unit 30 is shown by dashed lines in Figures 3 and 4, and is omitted in Figure 5.

[0035] 3 to 5, an outer bracket 10 is attached to the outer side of the side frame 3 in the seat width direction, and a lock unit 30 is attached to an outer surface 11 in the seat width direction of the outer bracket 10. The lock unit 30 engages with an engaged portion (striker) (not shown) provided on the vehicle body to lock the tilting of the seat back frame 2 (seat back S2).

[0036] 3 to 5, the inclined portion 3b of the side frame 3 and the outer bracket 10 are connected by the inner bracket 20. Also, a support bracket 40 is provided that supports an unlocking member (not shown) that unlocks the tilting movement of the seat back frame 2 (seat back S2), and a front portion 42 is attached to the inner bracket 20 and a rear portion 43 is attached to a wire member 50 in the seat front-rear direction.

[0037] (Outer bracket 10) The configuration of the outer bracket 10 will be described below with reference to FIGS. FIG. 6 is a front view of the outer bracket 10, and FIG. 7 is a side view of the outer bracket 10 as viewed from the outside in the seat width direction.

[0038] 6 and 7, the outer bracket 10 has an outer surface 11 arranged in the seat width direction, a front surface 12 and a rear surface 13 arranged in the seat front-rear direction, and an upper surface 14 arranged in the seat up-down direction. Here, the outer surface 11 connects the front surface 12 and the rear surface 13 in the seat front-rear direction. In addition, the outer surface 11 is connected to the upper surface 14 in the seat up-down direction. As shown in FIG. 6, the outer bracket 10 has a substantially box-like shape.

[0039] 6, a bent portion 16 that bends outward in the sheet width direction is formed below the outer surface 11, and an extension portion 17 is connected below the bent portion 16. In other words, on the side of the outer surface 11 opposite the upper surface 14, a bent portion 16 that bends in a direction away from the outer surface 11 is formed, and an extension portion 17 is formed continuously from the bent portion 16 at the tip of the bent portion 16.

[0040] 3 and 5 to 7, the outer surface 11 of the outer bracket 10 has an opening 11a that spans the rear surface 13. In addition, as shown in Fig. 3 and 7, the outer surface 11 has two mounting holes 11b used when mounting the lock unit 30 at positions closer to the front surface 12 than the rear surface 13 in the seat front-rear direction in the seat vertical direction.

[0041] 5 and 6, the upper surface 14 of the outer bracket 10 has an engagement portion 15 at a position straddling the rear surface 13. Specifically, the upper surface 14 of the outer bracket 10 is formed with the engagement portion 15, which is a recess having an outer shape that curves from the inside toward the outside in the seat width direction (in other words, toward the outer surface 11). The outer bracket 10 is attached to the inclined portion 3b of the side frame 3 by welding at the engagement portion 15.

[0042] As shown in Figures 5 and 6, the outer bracket 10 has a slit 12a on the front surface 12 and a slit 13a on the rear surface 13. The slit 12a is formed on the front surface 12 so as to extend obliquely from a corner adjacent to the outer surface 11 and the top surface 14. The slit 13a is formed on the rear surface 13 so as to extend obliquely from a corner adjacent to the outer surface 11 and the top surface 14.

[0043] 5, the outer bracket 10 is attached by welding to the inclined portion 3b behind the inclined portion 3b in the seat front-rear direction. Therefore, when the load input to the lock unit 30 when engaging with an engaged portion provided on the vehicle body is transmitted to the outer bracket 10, it becomes possible to withstand a force in a twisting direction relative to the seatback frame 2, thereby improving the strength around the inclined portion 3b.

[0044] As shown in FIGS. 4 and 5, the bent portion 16 of the outer bracket 10 is attached to the side frame 3 by being welded in the region between the first frame portion 3a and the inclined portion 3b.

[0045] Further, the extension 17 of the outer bracket 10 is welded to a region of the first frame portion 3a near the inclined portion 3b and attached to the side frame 3. The shape of the bent portion 16 is formed to correspond to the shape between the first frame portion 3a and the inclined portion 3b. In this way, since the extension 17 of the outer bracket 10 is attached to the first frame portion 3a below the inclined portion 3b in the seat vertical direction, the strength of the first frame portion 3a below the inclined portion 3b is improved.

[0046] The outer bracket 10 is formed by punching and bending a single metal plate. At this time, since the front surface 12 and the rear surface 13 of the outer bracket 10 are configured to have the slits 12a, 13a, respectively, it is possible to form the front surface 12 and the rear surface 13 having the slits 12a, 13a by bending the metal plate, etc., and therefore the work of molding the outer bracket 10 is easy. Similarly, since the outer bracket 10 has the opening 11a formed at a position straddling the outer surface 11 and the rear surface 13, the work of molding the outer bracket 10 is easy, and it is possible to reduce the weight without reducing the rigidity while securing the outer surface 11 to which the lock unit 30 is attached.

[0047] (Inner bracket 20) The configuration of the inner bracket 20 will be described below with reference to FIGS. FIG. 8 is a front view of the inner bracket 20, and FIG. 9 is an external view of the inner bracket 20 as viewed from above.

[0048] As shown in FIG. 8, the inner bracket 20 is formed of a curved metal plate-like member, and when attached to the seat back frame 2 of the vehicle seat S, has a first portion 21 having a front end portion 21a that is positioned forward in the fore-and-aft direction of the seat, and a second portion 22 having a rear end portion 22a that is positioned rearward.

[0049] As shown in Figures 8 and 9, the inner bracket 20 has an upper end 23 and a lower end 24 that are arranged in the vertical direction of the seat when attached to the seat back frame 2 of the vehicle seat S, and has a shape that is gradually curved from the first portion 21 to the second portion 22.

[0050] 4, the inner bracket 20 is attached by welding to the front surface 12 of the outer bracket 10 and the inclined portion 3b of the side frame 3 near the front end 21a of the first portion 21, and is attached by welding to the inner side of the inclined portion 3b of the side frame 3 in the seat width direction near the rear end 22a of the second portion 22. More specifically, the inner bracket 20 is attached by welding to the inclined portion 3b in front of the inclined portion 3b in the seat front-rear direction and on the inner side of the inclined portion 3b in the width direction of the vehicle seat S. Therefore, the load input to the outer bracket 10 can be received by the inner bracket 20 and efficiently transmitted to the seat back frame 2 via the inner bracket 20.

[0051] 3 and 4, at least a portion of the inclined portion 3b of the side frame 3 is surrounded by the outer bracket 10 and the inner bracket 20, improving the strength of the vicinity of the inclined portion 3b. More specifically, at least a portion of the inclined portion 3b of the side frame 3 is sandwiched between the outer bracket 10 and the inner bracket 20 and joined by welding, improving the strength of the vicinity of the inclined portion 3b.

[0052] (Lock Unit 30) Fig. 10 is a partial exploded view of the seat frame F. As shown in Fig. 10, the lock unit 30 has an inner side surface 31 on the inner side in the seat width direction and an outer side surface 32 on the outer side in the seat width direction, and an attachment hole (not shown) used when attaching the lock unit 30 to the outer bracket 10 is formed in the inner side surface 31. The lock unit 30 is connected to an unlocking member 41 supported by a support bracket 40 so as to be rotatable.

[0053] 11 shows a side view of the seat frame F with some components omitted so that the internal structure of the lock unit 30 can be seen. The lock unit 30 is a known lock unit including a spring member 33 and a lock piece 34 connected to the spring member 33, and the lock piece 34 engages with a striker (engaged portion) (not shown) supported on the vehicle body to lock the tilting of the seat back frame 2. When the occupant rotates the lock release member 41, the spring member 33 included in the lock unit 30 extends, and the engagement between the lock piece 34 and the striker is released, thereby unlocking the tilting of the seat back frame 2.

[0054] An attachment hole (not shown) provided on the inner side surface 31 of the lock unit 30 is aligned with an attachment hole 11b provided on the outer side surface 11 of the outer bracket 10, and a fastening member (not shown, for example, a bolt) is passed through, thereby fixing the lock unit 30 to the outer side surface 11 of the outer bracket 10. In this manner, the lock unit 30 is attached to the inclined portion 3b of the side frame 3 constituting the seat back frame 2 via the outer bracket 10.

[0055] As described above, since the lock unit 30 is attached to the outer surface 11 of the outer bracket 10, the load input to the lock unit 30 when the lock unit 30 engages with an engaged portion provided on the vehicle body can be efficiently transmitted to the seat back frame 2 via the outer bracket 10 attached to the inclined portion 3b of the side frame 3.

[0056] Also, as shown in FIG. 11, the lock unit 30 is located forward of the front surface in the extension direction of the first frame portion 3a in the seat fore-and-aft direction. This makes it possible to tilt the seat back S2 rearward compared to a case in which the lock unit 30 is located rearward of the front surface in the extension direction of the first frame portion 3a, thereby improving the riding comfort for the occupant.

[0057] (Wire member 50) As shown in Figs. 3 and 5, the wire member 50 is formed by bending a wire, and includes a first extending portion 51 and a second extending portion 52 extending in the seat width direction, and a connecting portion 53 connecting the first extending portion 51 and the second extending portion 52. As shown in Figs. 3 and 5, a first end 51a of the first extending portion 51 is attached by welding to the upper frame 5, and a second end 52a of the second extending portion 52 is attached by welding to the upper surface 14 of the outer bracket 10. In addition, the wire is bent at a first bent portion 51b, which is an end opposite to the first end 51a of the first extending portion 51, to connect the connecting portion 53. In addition, the wire is bent at a second bent portion 52b, which is an end opposite to the second end 52a of the second extending portion 52, to connect the connecting portion 53.

[0058] 5, a first end 51a (one end) of the wire member 50 is attached to the seat back frame 2 (upper frame 5), and a second end 52a (the other end) of the wire member 50 is attached to the upper surface 14 of the outer bracket 10. Therefore, the support bracket 40 and the lock release member 41 are fixed by a simple structure.

[0059] As shown in a side view of the seat frame F without the lock unit 30 in Figure 12, the support bracket 40 is attached by welding at its front portion 42 to the first portion 21 of the inner bracket 20 in the seat fore-and-aft direction, and at its rear portion 43 to the first extension portion 51 of the wire member 50.

[0060] FIG. 13 is a schematic diagram showing the positional relationship between the seat frame F and the side airbag module SAB. As shown in FIG. 13, the side airbag module SAB is disposed on the outside in the seat width direction with respect to the seat frame F. At this time, as shown in FIG. 4, the lock unit 30 is provided on the inside of the extension portion 17 of the first frame portion 3a and the outer bracket 10 in the seat width direction, so that interference with the lock unit 30 is suppressed when the side airbag module SAB is disposed. More specifically, the inner side surface 31 of the lock unit 30 is provided on the inside of the outer surfaces of the first frame portion 3a and the outer bracket 10 in the seat width direction in the seat width direction, so that interference with the lock unit 30 is suppressed when the side airbag module SAB is disposed. At this time, if the outer side surface 32 of the lock unit 30 is provided on the inside of the outer surfaces of the first frame portion 3a and the outer bracket 10 in the seat width direction in the seat width direction, it is preferable because the cushioning between the side airbag module SAB and the lock unit 30 is further suppressed.

[0061] <Explanation of the effects of the vehicle seat S> According to the vehicle seat S (vehicle seat) described above, the vehicle seat S is provided with a seat back S2 that is tiltable relative to the seat cushion S1, the seat back S2 includes a seat back frame 2 and a lock unit 30 that engages with an engaged portion (striker) provided on the vehicle body to lock the tilting of the seat back frame 2, the seat back frame 2 has a side frame 3 arranged on the side of the vehicle seat S, the side frame 3 includes a first frame portion 3a extending in the vertical direction of the vehicle seat S and an inclined portion 3b inclined inward in the width direction of the vehicle seat S from an upper end of the first frame portion 3a, and the lock unit 30 is provided on the inside of the first frame portion 3a in the width direction of the vehicle seat S.

[0062] Therefore, since the lock unit 30 is provided inside the first frame portion 3a of the side frame 3 in the width direction of the vehicle seat S, when a side airbag module SAB or the like is arranged on the outside in the width direction of the vehicle seat S, it is possible to prevent interference with the lock unit 30 and to maintain a compact configuration.

[0063] Furthermore, the vehicle seat S includes an outer bracket 10 attached to the outer side of the inclined portion 3b in the width direction of the vehicle seat S, and the locking unit 30 is attached to an outer surface 11 of the outer bracket 10 in the width direction of the vehicle seat S. Therefore, the load input to the locking unit 30 when engaging with an engaged portion provided on the vehicle body can be efficiently transmitted to the seat back frame 2 via the outer bracket 10 attached to the inclined portion 3b of the side frame 3.

[0064] Moreover, according to the vehicle seat S, the outer bracket 10 is attached to the first frame portion 3a below the inclined portion 3b in the vertical direction of the vehicle seat S. Therefore, it is possible to improve the strength of the first frame portion 3a below the inclined portion 3b.

[0065] Furthermore, according to the vehicle seat S, the outer bracket 10 is attached to the inclined portion 3b behind the inclined portion 3b in the front-rear direction of the vehicle seat S. Therefore, when a load input to the lock unit 30 when engaging with an engaged portion provided on the vehicle body is transmitted to the outer bracket 10, the outer bracket 10 can also withstand a force in a twisting direction relative to the seat back frame 2, improving the strength around the inclined portion 3b.

[0066] Furthermore, according to the vehicle seat S, the outer bracket 10 has a rear surface 13 at the rear in the front-rear direction of the vehicle seat S, and the rear surface 13 has a slit 13a. Since the rear surface 13 of the outer bracket 10 has the slit 13a, it is possible to form the rear surface 13 having the slit 13a by bending a plate material, etc., which makes it easier to mold the outer bracket 10.

[0067] Moreover, the vehicle seat S includes an inner bracket 20 attached to the inside of the inclined portion 3b in the width direction of the vehicle seat S, and at least a portion of the inclined portion 3b is surrounded by the outer bracket 10 and the inner bracket 20. Therefore, since the inclined portion 3b of the side frame 3 is surrounded by the outer bracket 10 and the inner bracket 20, the strength of the vicinity of the inclined portion 3b is improved.

[0068] Moreover, according to the vehicle seat S, the inner bracket 20 is attached to the inclined portion 3b in front of the inclined portion 3b in the front-rear direction of the vehicle seat S and on the inside of the inclined portion 3b in the width direction of the vehicle seat S. Therefore, the load input to the outer bracket 10 is received by the inner bracket 20, and can be efficiently transmitted to the seat back frame 2 via the inner bracket 20.

[0069] Moreover, according to the vehicle seat S, at least a portion of the inclined portion 3b is sandwiched and joined between the outer bracket 10 and the inner bracket 20. Therefore, since the inclined portion 3b of the side frame 3 is sandwiched and joined between the outer bracket 10 and the inner bracket 20, respectively, the strength of the vicinity of the inclined portion 3b is improved.

[0070] Moreover, according to the vehicle seat S, the outer bracket 10 has an upper surface 14 in the vertical direction of the vehicle seat S, and includes a wire member 50 having one end (first end 51a) attached to the seat back frame 2 (upper frame 5), and the other end (second end 52a) of the wire member 50 is attached to the upper surface 14 of the outer bracket 10. Therefore, it is possible to fix the unlocking member 41 with a simple structure.

[0071] Furthermore, according to the vehicle seat S, the lock unit 30 is provided forward of the front surface in the extending direction of the first frame portion 3a in the front-rear direction of the vehicle seat S. Therefore, since the lock unit 30 is provided forward of the front surface in the extending direction of the first frame portion 3a, it is possible to tilt the seat back S2 backward, improving the riding comfort of the occupant.

[0072] <Modification> Although the configuration of the vehicle seat S according to one embodiment of the present invention has been described above, the above embodiment is merely an example for facilitating understanding of the present invention and does not limit the present invention. In other words, the present invention can be modified and improved without departing from the spirit thereof, and the present invention naturally includes equivalents thereof.

[0073] In particular, the structure, material, shape, dimensions, etc. of each element constituting the vehicle seat S are not limited to those described in the above embodiment, and may be designed arbitrarily as long as it does not deviate from the spirit of the present invention.

[0074] In the above embodiment, a rear seat corresponding to a rear seat of a vehicle has been described as an example of the vehicle seat S. The vehicle seat S according to this embodiment can also be used as a middle seat in the second row in a vehicle having three rows of seats in the front-rear direction of the vehicle.

[0075] In the above embodiment, the inclined portion 3b of the side frame 3 is gradually inclined inward in the seat width direction, but the inclination of the inclined portion 3b can be set appropriately as long as the inclined portion 3b is inclined in a direction toward the inside of the seat width direction. For example, the inclined portion 3b may be formed so as to be inward in the seat width direction at an angle of approximately 90° with respect to the first frame portion 3a.

[0076] The strength of the inner bracket 20 may be improved by forming reinforcing beads extending between the front end 21a and the rear end 22a of the inner bracket 20. Specifically, the reinforcing beads can be formed at positions close to the upper end 23 and at positions close to the lower end 24 of the inner bracket 20.

[0077] In the above embodiment, an example has been described in which the side airbag module SAB is disposed on the outer side in the seat width direction of the vehicle seat S. Even in the case where a member other than the side airbag module SAB is disposed on the outer side in the seat width direction, the vehicle seat S according to this embodiment can prevent the member from interfering with the lock unit 30.

[0078] The vehicle seat according to the present embodiment has been described above mainly as a vehicle seat mounted on a vehicle. The vehicle seat according to the present embodiment is not limited to a vehicle seat mounted on a ground-traveling vehicle having wheels such as an automobile or a train, but may be, for example, a seat mounted on an aircraft or a ship that moves on a non-ground surface. [Explanation of symbols]

[0079] S Vehicle seat S1 Seat Cushion S11 Cushion Pad S12 trim cover S2 seat back S21 Cushion Pad S22 trim cover S3 Headrest S31 Cushion Pad S32 trim cover Seat frame, front 1 Seat cushion frame 1a Support leg 2 Seat back frame 3 Side frame 3a First frame section 3b Slope 4 Side frame 5 Upper Frame 6 Lower Frame 7. Wireframe 8 Linked Frame 10 Outer Bracket 11 External surface 11a opening 11b Mounting hole 12 Front 12a Slit 13 Rear 13a Slit 14 Top side 15 Engagement part 16 Bend 17 Extension 20 Inner bracket 21 Part 1 21a Front end 22 Part 2 22a Rear end 23 Upper end 24 Lower end 30 Lock Unit 31 Medial side 32 Outer side 33 Spring parts 34 Lock piece 40 Support bracket 41 Unlocking member 42 Front 43 Posterior part 50 Wire material 51 1st extension part 51a First end 51b 1st bend 52 Second extension part 52a 2nd end 52b Second bend 53 Connecting part SAB Side Airbag Module

Claims

1. A vehicle seat having a seat back that is tiltable relative to a seat cushion, The seat back is A seat back frame, a lock unit that engages with an engaged portion provided on a vehicle body to lock the tilting of the seat back frame, The seat back frame is A side frame is provided on a side portion of the vehicle seat, The side frame includes a first frame portion extending in a vertical direction of the vehicle seat; an inclined portion inclined inwardly in a width direction of the vehicle seat from an upper end portion of the first frame portion, A bracket for mounting the lock unit is attached to the inclined portion, The lock unit is provided at a position facing the inclined portion, A vehicle seat according to claim 1, further comprising a wire member attached to an upper surface of said bracket for attaching an unlocking member for unlocking said lock unit.

2. A side airbag module is provided.

2. The vehicle seat according to claim 1, wherein the lock unit is provided above the inclined portion and between the seat back frame and the side airbag module in the seat width direction.

3. 2. The vehicle seat according to claim 1, wherein the lock unit is disposed inwardly of outer ends of the first frame portion and the bracket in a seat width direction.

4. 2. The vehicle seat according to claim 1, wherein a lower end of the wire member is disposed on the same plane as the upper surface of the bracket.

5. 2. The vehicle seat according to claim 1, wherein the bracket is welded to the first frame portion.

6. 6. The vehicle seat according to claim 5, wherein the bracket is welded to a position above the center of the inclined portion in the up-down direction.

7. 2. The vehicle seat according to claim 1, wherein an upper surface of the bracket is located at a position higher than an upper surface of the lock unit.

8. Having the lock release member, The lock unit and the unlocking member are connected by a cable, 2. The vehicle seat according to claim 1, wherein a connection portion between the lock unit and the cable is provided on an outer side of the inclined portion.

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