Rear seat for vehicle

Abstract

To obtain a rear seat for a vehicle that can suppress forward tilting of a seatback including a central portion in the vehicle width direction when cargo in a luggage compartment collides with a rear surface of the seatback.SOLUTION: A rear seat 10 for a vehicle includes: a seatback frame 14 that is disposed on at least one side in a vehicle width direction in front of a luggage compartment of the vehicle and forms a framework of a seatback 13; a cylindrical lower pipe 20 that extends in a seat width direction at a lower end portion of the seatback frame 14; and a support shaft 30 that extends in the vehicle width direction while being inserted through the lower pipe 20, is fixed at both ends to a vehicle body, and supports the lower pipe 20 in a circumferential direction in a slidable manner.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Patent Document 1 listed below discloses a vehicle seat unit (vehicle rear seat) that is installed in front of a trunk (luggage compartment) of a vehicle. In the technology described in Patent Document 1 listed below, the left and right seat backs are connected by a striker to prevent two side-by-side seats from being pushed forward and opening like a double door when cargo loaded in the luggage compartment suddenly decelerates the vehicle or in a frontal collision. The outer sides of the left and right seats in the vehicle width direction are fixed to the side walls of the vehicle body. In this technology, each seat can be raised or lowered separately by releasing the connection by the striker. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-046241 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above technology, the center portion of the vehicle width direction of the rear seat for a vehicle is not fixed to the vehicle body but is simply connected to the left and right seat backs by a striker. Therefore, there is room for improvement in preventing the seat back, including the center portion in the vehicle width direction, from tipping forward when cargo in the luggage compartment collides with the back of the seat back (in the event of a cargo collision).

[0005] In consideration of the above, the present invention aims to provide a rear seat for a vehicle that can prevent the seat back, including the central portion in the vehicle width direction, from falling forward when cargo in the luggage compartment collides with the back of the seat back. [Means for solving the problem]

[0006] The vehicle rear seat according to the present invention as set forth in claim 1 includes a seat back frame arranged at least on one side in the vehicle width direction at the front of a luggage compartment of the vehicle and constituting a skeleton of a seat back; a cylindrical lower pipe extending in the seat width direction at a lower end of the seat back frame; and a support shaft inserted through the lower pipe, extending in the vehicle width direction, both ends of which are fixed to a vehicle body, and supporting the lower pipe slidably in a circumferential direction. It has the following characteristics.

[0007] According to the present invention as set forth in claim 1, a cylindrical lower pipe extending in the seat width direction is provided at the lower end of a seat back frame that constitutes the framework of the seat back, and a support shaft is inserted into this lower pipe. The lower pipe is supported by the support shaft so as to be slidable in the circumferential direction.

[0008] Under normal circumstances, the lower pipe slides circumferentially on the radially outer side of the support shaft, causing the seatback frame to rotate around the support shaft, allowing the seatback to be raised or lowered smoothly.

[0009] On the other hand, if the vehicle suddenly decelerates or a frontal collision occurs and cargo in the luggage compartment strikes the back of the seatback, the lower pipe and support shaft are bent convexly toward the front of the vehicle due to the impact load from the cargo. If the seatback frame attempts to rotate in this state, the lower pipe interferes with the support shaft. This restricts the rotation of the seatback frame, and ultimately the seatback, in the event of a cargo collision.

[0010] A vehicle rear seat according to the present invention as set forth in claim 2 is the invention as set forth in claim 1, wherein the support shaft is formed in a cylindrical shape.

[0011] According to the present invention, the support shaft is formed in a cylindrical shape and is configured to be lighter than when it is formed in a solid shape. In addition, the support shaft has lower bending rigidity than when it is formed in a solid shape, so it bends quickly and effectively when subjected to a collision load from a cargo, even when the collision load is small.

[0012] The vehicle rear seat according to the present invention as set forth in claim 3 is the invention as set forth in claim 1 or claim 2, in which a resin bushing is disposed between the lower pipe and the support shaft.

[0013] According to the present invention as set forth in claim 3, the lower pipe is supported on the support shaft via a resin bushing, which prevents the lower pipe from directly rubbing against the support shaft when the lower pipe rotates around the support shaft, thereby preventing abnormal noise from being generated. [Effects of the Invention]

[0014] As described above, the vehicle rear seat of the present invention described in claim 1 has the excellent effect of preventing the seat back, including the central portion in the vehicle width direction, from tipping forward when cargo in the luggage compartment collides with the back of the seat back.

[0015] The vehicle rear seat according to the present invention as set forth in claim 2 has the excellent effect of being able to reduce the weight of the seat and effectively suppressing the seat back from tipping forward in the event of a cargo collision.

[0016] The vehicle rear seat according to the present invention as set forth in claim 3 has the excellent effect of being able to suppress the generation of abnormal noise under normal circumstances. [Brief explanation of the drawings]

[0017] [Figure 1] 2 is a perspective view of the skeleton of the right seat back of the vehicle rear seat according to the embodiment, as viewed from the left front side of the vehicle. FIG. [Figure 2] FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. [Figure 3] 2 is a perspective view showing a state in which an outer lower pipe and an inner lower pipe of the right seat back shown in FIG. 1 are deformed. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] A vehicle rear seat 10 according to one embodiment of the present invention will be described below with reference to Figures 1 to 3. Note that the arrows FR, UP, and RH shown as appropriate in each figure respectively indicate the front side, upper side, and left-right (widthwise) left side of the vehicle rear seat 10. Furthermore, when the front-rear, up-down, and left-right directions are used in the following description unless otherwise specified, they refer to front-rear in the seat front-rear direction, up-down in the seat up-down direction, and left-right in the seat left-right direction (widthwise), respectively.

[0019] A rear seat 10 for a vehicle (hereinafter referred to as "rear seat 10") is a rear seat for seating three passengers and includes a seat cushion (not shown) on which passengers sit, a seatback 12 that supports the backs of the passengers, and three headrests (not shown) that support the heads of the passengers. The rear seat 10 is divided 60:40 in the vehicle width direction into a right seatback 13 for two passengers and a left seatback (not shown) for one passenger. The rear seat 10 is a split-folding rear seat in which the right seatback 13 and the left seatback (not shown) can be folded forward separately. The rear seat 10 is located at the front of the luggage compartment of the vehicle. The seatbelt (not shown) of the center seat of the rear seat 10 is designed to come out from the shoulder of the center seat. Note that the seatbelt of the center seat of a vehicle rear seat may also come out from the vehicle body.

[0020] The left seat back (not shown) has the same configuration as the right seat back 13, so the following description will focus on the right seat back 13, and the description of the left seat back will be omitted.

[0021] The right seat back 13 includes a seat back frame 14 and a locking device 22 provided on the upper outer side of the seat back frame 14 in the vehicle width direction. Although not shown for convenience of explanation, a seat pad is attached to the seat back frame 14, and a seat cover is placed on the seat pad.

[0022] The locking device 22 engages with a striker (not shown) provided on the side wall of the vehicle body, thereby restraining the right seatback 13 in an upright position (the position shown in FIG. 1; hereinafter referred to as the "upright position"). When the locking device 22 is released, the right seatback 13 becomes able to be tilted forward. When the right seatback 13 is raised from the forward tilted state to the upright position, the locking device 22 engages with the striker (not shown), and the right seatback 13 is again restrained in the upright position.

[0023] The seatback frame 14 is configured in a generally rectangular shape and includes an upper pipe 16 extending in the seat width direction at the upper end of the seatback, a pair of left and right side frames 18 extending from both ends of the upper pipe 16 in the seat width direction toward the lower side of the seatback, and a lower pipe 20 connecting the lower ends of the pair of left and right side frames 18 in the seat width direction. As an example, the upper pipe 16 and the lower pipe 20 are configured by bending a single hollow iron pipe into a generally U-shape. The lower pipe 20 is also a single iron pipe extending in the seat width direction. The lower ends of the pair of left and right side frames 18 are welded to the lower pipe 20.

[0024] A center support member 22 fixed to a vehicle floor (not shown) is disposed between the right seat back 13 and the left seat back (not shown). The center support member 22 is formed in a substantially L-shaped plate shape when viewed from the front of the vehicle, and includes a lower wall portion 24 fastened to the vehicle floor (not shown), and a vertical wall portion 26 erected from the right side of the lower wall portion 24 in the seat width direction toward the upper side of the vehicle. The shape of the center support member 22 is not limited to the above.

[0025] Further, a side support member 28 is provided on the right side wall of the vehicle body. As an example, the side support member 28 is formed in a plate shape extending in the vehicle up-down direction and the vehicle front-rear direction, and is fastened to the right side wall of the vehicle body (not shown). The configuration of the side support member 28 is not limited to the above, and for example, the side support member may be fixed to the vehicle floor in the same way as the center support member.

[0026] The lower portion of the center support member 22 and the upper portion of the side support member 28 are connected by a support shaft 30 extending in the seat width direction. Both end portions of the support shaft 30 in the seat width direction are welded to the center support member 22 and the side support member 28, respectively. The support shaft 30 is a cylindrical iron pipe that is axially longer and has a smaller diameter than the lower pipe 20 of the seatback frame 14, and is inserted inside the lower pipe 20. The support shaft 30 supports the lower pipe 20 so that it can slide circumferentially.

[0027] A pair of left and right resin bushings 32 are arranged between the support shaft 30 and the lower pipe 20 of the seat back frame 14 and at both ends of the lower pipe 20 in the seat width direction. As shown in Fig. 2, the resin bushings 32 include a cylindrical main body 32A and flanges 32B extending radially from the ends of the main body 32A in the seat width direction. The lower pipe 20 is configured to rotate smoothly around the support shaft 30 via the resin bushings 32.

[0028] 1 and 2, iron spacers 34 are disposed between the left resin bushing 32 and the vertical wall portion 26 of the center support member 22, and between the right resin bushing 32 and the side support member 28. This determines the position of the lower pipe 20 in the seat width direction. Note that the vehicle rear seat does not necessarily have to be provided with the spacers 34.

[0029] (action) Next, the operation of this embodiment will be described with reference to FIG.

[0030] In the vehicle rear seat 10 according to this embodiment, under normal circumstances, the lower pipe 20 slides circumferentially on the radially outer side of the support shaft 30. This causes the seatback frame 14 of the right seatback 13 to rotate around the support shaft. This allows the right seatback 13 to be smoothly raised and lowered.

[0031] On the other hand, when the vehicle suddenly decelerates or a frontal collision occurs and cargo in the luggage compartment (not shown) collides with the back of the right seatback 13, the lower pipe 20 and the support shaft 30 are bent convexly toward the front of the vehicle due to the collision load from the cargo, as shown in Figure 3. If the seatback frame 14 attempts to rotate in this state, the lower pipe 20 inserted through the support shaft 30 interferes with the support shaft 30. This restricts the rotation of the seatback frame 14 and, ultimately, the right seatback 13 in the event of a cargo collision. This makes it possible to prevent the seatback 12, including the central portion in the vehicle width direction, from tipping forward.

[0032] Although detailed description is omitted, the vehicle rear seat 10 according to this embodiment has a similar configuration to the left seat back (not shown), so when cargo in a luggage compartment (not shown) collides with the back of the left seat back, the lower pipe and support shaft of the left seat back bend, restricting the rotation of the left seat back. In other words, the vehicle rear seat 10 according to the above embodiment can prevent both the right seat back 13 and the left seat back (not shown) from tipping forward.

[0033] Furthermore, in the vehicle rear seat 10 according to this embodiment, the support shaft 30 is formed in a cylindrical shape, and is configured to be lighter than if it were formed in a solid shape. Furthermore, since the support shaft 30 has lower bending rigidity than if it were formed in a solid shape, it bends quickly and effectively in response to a cargo collision load, even with a small collision load. This allows the vehicle rear seat 10 to be made lighter, and also effectively prevents the right seat back 13 from tipping forward in the event of a cargo collision.

[0034] Furthermore, in the vehicle rear seat 10 according to this embodiment, the lower pipe 20 is supported by the support shaft 30 via the resin bushing 32. Therefore, when the lower pipe 20 rotates around the support shaft 30, it is possible to suppress the lower pipe 20 from directly rubbing against the support shaft 30 and generating metallic noise.

[0035] Furthermore, with the vehicle rear seat 10 according to this embodiment, the seat belt (not shown) for the center seat of the rear seat 10 is designed to come out from the shoulder of the center seat. In other words, during sudden vehicle deceleration or a frontal collision, the seat belt for the center seat is pulled toward the front of the seat, causing the right seat back 13 to tend to tilt forward. However, because the support shaft 30 is inserted through the lower pipe 20 of the right seat back 13, the right seat back 13 can be prevented from tilting forward. In other words, the vehicle rear seat 10 according to this embodiment also exhibits excellent effects in the center seat belt anchor test.

[0036] Furthermore, with the vehicle rear seat 10 according to this embodiment, the right seatback 13 is restrained to the right side wall of the vehicle body by the locking device 22 provided at the upper and outer side in the vehicle width direction. Therefore, rotation is restricted near the rotation axis by the lower pipe 20 through which the support shaft 30 is inserted, and rotation of the right seatback 13 is also restricted at the upper part of the seatback away from the rotation axis. By restricting rotation at the top and bottom of the seatback in this way, rotation can be restricted effectively.

[0037] [Supplementary explanation of the above embodiment] In the above embodiment, the left seat back has been described as having the same configuration as the right seat back 13, but this is not limited to this, and only the seat back on one side in the vehicle width direction may be provided with a lower pipe through which a support shaft is inserted.

[0038] In the above embodiment, the rear seat 10 is described as being divided 6:4 in the vehicle width direction into a right seat back 13 for two passengers and a left seat back (not shown) for one passenger, but this is not limited to this. For example, the rear seat for a vehicle may be divided 4:6 in the vehicle width direction into a right seat back for one passenger and a left seat back for two passengers. The rear seat for a vehicle may also be divided 4:2:4 in the vehicle width direction. Furthermore, the rear seat for a vehicle may be a two-seater seat divided 5:5 in the vehicle width direction.

[0039] Because cargo in the luggage compartment is likely to collide with the center of the vehicle's rear seat in the vehicle width direction, it is desirable that at least the lower pipe of the seat back on the 6-side be inserted into the support shaft in a vehicle rear seat that is divided into 6:4, 4:6, or 4:2:4. In this case, when only the lower pipe of the seat back on the 6-side is inserted into the support shaft, the number of parts can be reduced while effectively suppressing forward tilting of the seat back of the vehicle rear seat in the center of the vehicle width direction. However, the lower pipe of the seat back on the 6-side may not be supported by the support shaft, and only the lower pipe of the seat back on the 4-side may be supported by the support shaft. Furthermore, when the lower pipes of both the left and right seat backs are supported by the support shaft as in the above embodiment, forward tilting of both the left and right seat backs is suppressed.

[0040] In the above embodiment, the support shaft 30 is described as a cylindrical iron pipe, but this is not limiting. For example, the support shaft may be formed in a solid shape.

[0041] Furthermore, in the above embodiment, the resin bushing 32 is described as being arranged between the lower pipe 20 and the support shaft 30, but this is not limited to this, and the vehicle rear seat does not need to be equipped with a resin bushing.

[0042] Furthermore, in the above embodiment, the support shaft 30 is described as being fixed to the vehicle body via the center support member 22 and the side support member 28, but this is not limiting, and the support shaft may be fixed directly to the vehicle body. For example, the support shaft may be formed in a generally U-shape that opens downwards on the vehicle, and both ends of the support shaft may be fixed to the vehicle floor. [Explanation of symbols]

[0043] 10 Rear seat for vehicle 13 Right seat back (seat back) 20 Lower pipe 30 Support shaft 32 Resin bushing

Claims

1. a seat back frame that is disposed in a luggage compartment of the vehicle at the front of the vehicle and on at least one side in a vehicle width direction, and that forms a framework of the seat back; a cylindrical lower pipe extending in a seat width direction at a lower end of the seatback frame; a support shaft that is inserted through the lower pipe, extends in a vehicle width direction, has both ends fixed to a vehicle body, and supports the lower pipe slidably in a circumferential direction; A rear seat for a vehicle having:

2. The support shaft is formed in a cylindrical shape. The rear seat for a vehicle according to claim 1.

3. A resin bushing is disposed between the lower pipe and the support shaft.

3. The rear seat for a vehicle according to claim 1 or 2.

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