Vehicle rear seat

Abstract

To obtain a vehicle rear seat which enables reduction of the weight of a seat frame while absorbing an impact to inhibit forward falling of a seat back when a stored object collides with the seat back.SOLUTION: A vehicle rear seat 10 includes: a seat back 16 which is disposed at the vehicle front side relative to a luggage compartment 18 of a vehicle and configured to tilt onto a seat cushion 12; and an airbag 26 which is provided at the seat back 16 side and disposed expanding to the back surface side of the seat back 16 in a state that the seat back 16 stands.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] The following Patent Document 1 discloses a rear seat (rear seat) arranged in the front of the luggage compartment of a vehicle. This rear seat is equipped with a protect bar at the rear end of the seat cushion to reduce the collision load on the seat back when cargo in the luggage compartment collides with the back of the seat back (in the event of a cargo collision). The protect bar protrudes from the rear end of the seat cushion toward the rear of the vehicle and extends in the vehicle width direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-217819 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above technology, the protect bar receives the collision load directly from the cargo, so the seat frame needs to be highly rigid. Therefore, there is room for improvement in reducing the weight of the seat frame while absorbing the impact and preventing the seat back from tipping forward during a cargo collision.

[0005] In consideration of the above, an object of the present invention is to provide a rear seat for a vehicle that can absorb impact in the event of a cargo collision, suppress forward tilting of the seat back, and reduce the weight of the seat frame. [Means for solving the problem]

[0006] The rear seat for a vehicle according to the present invention as described in claim 1 has a seat back that is arranged on the front side of the luggage compartment of the vehicle and is configured to be able to tilt onto a seat cushion, and an air bag that is provided on the seat back side and is arranged in an inflated state on the back side of the seat back when in an upright position.

[0007] According to the present invention described in claim 1, the seatback is stored by tilting onto the seat cushion. This seatback is disposed on the front side of the vehicle's luggage compartment. Furthermore, an air bag is disposed in an inflated state on the rear side of the seatback when the seatback is in an upright position. Therefore, when cargo loaded in the luggage compartment of the vehicle attempts to collide with the seatback from the rear of the vehicle during sudden deceleration of the vehicle or a frontal collision, the air bag disposed on the rear side of the seatback acts as a buffer to absorb the collision load. This reduces the impact on the seatback, thereby preventing the seatback from tipping forward. Furthermore, since the air bag is lighter than a metal protector bar or the like, the weight of the vehicle rear seat can be reduced.

[0008] The vehicle rear seat of the present invention described in claim 2 is the invention described in claim 1, in which a plate-shaped member is arranged on the rear side of the seat back of the air bag so as to cover the air bag when viewed from the rear side of the seat back.

[0009] According to the present invention as set forth in claim 2, the air bag is covered by a plate-shaped member when viewed from the rear side of the seat back. When the vehicle suddenly decelerates or a frontal collision occurs and the cargo moves toward the front of the vehicle, the cargo collides with the plate-shaped member, and the impact is absorbed by the air bag on the front side of the vehicle. Here, because the plate-shaped member covers the air bag when viewed from the rear side of the seat back, the impact of the cargo is received by the surface of the plate-shaped member, and the collision load can be widely distributed throughout the entire air bag. Furthermore, because the cargo directly collides with the plate-shaped member, damage to the air bag can be prevented.

[0010] The vehicle rear seat of the present invention described in claim 3 is the invention described in claim 2, in which the upper end of the plate-shaped member in the upright position is rotatably connected to the back of the seat back, and one end of a tension member is fixed to the lower end of the plate-shaped member in the upright position, which pulls the lower end toward the front of the seat back when the seat back is tilted toward the front of the seat, and an air vent is provided in the air bag.

[0011] According to the present invention described in claim 3, when the seat back is folded forward, the lower end of the plate-shaped member is pulled toward the front of the seat back by the tension member, with the upper end serving as the axis center. Here, since the air bag is provided with an air vent, the lower end of the plate-shaped member is pulled toward the front of the seat back while the air bag is sandwiched between the back of the seat back and the plate-shaped member, and the air inside the air bag is discharged through the air vent. This compresses the air bag. Therefore, when the seat back is folded down onto the seat cushion (this position of the seat back is referred to as the "storage position"), a large luggage compartment space can be secured. Note that the term "tension member" here broadly encompasses string-shaped members, band-shaped members, elastic members such as rubber, and sheet-shaped members.

[0012] The vehicle rear seat of the present invention described in claim 4 is the invention described in claim 3, in which a pair of the tension members are provided in the seat width direction, and each of the one end portions is fixed to the end portion in the seat width direction at the lower end portion of the plate-shaped member.

[0013] According to the present invention as set forth in claim 4, a pair of tension members are provided in the seat width direction (left-right direction), and the right tension member is fixed to the right end of the lower end of the plate-shaped member. The left tension member is fixed to the left end of the lower end of the plate-shaped member. As a result, the pair of left and right tension members pull the lower end of the plate-shaped member equally on the left and right. Therefore, the air bag is compressed equally in the seat width direction by the plate-shaped members.

[0014] A vehicle rear seat according to the present invention as set forth in claim 5 is the invention as set forth in claim 1 or claim 2, further comprising a biasing member that biases the air bag in a direction to inflate it.

[0015] According to the present invention as set forth in claim 5, the air bag is inflated by the biasing member, so that the air bag automatically returns to its original shape even if it is crushed by a collision load.

[0016] The vehicle rear seat according to the present invention as set forth in claim 6 is the invention as set forth in claim 3 or claim 4, further comprising a biasing member that biases the air bag in a direction to inflate it.

[0017] According to the present invention as set forth in claim 6, when the seat back is raised from the stowed position to the upright position, the force with which the tension member pulls the plate-shaped member toward the front of the seat back weakens, and the biasing force of the biasing member inflates the air bag, so that the air bag is inflated again when the seat back is in the upright position. [Effects of the Invention]

[0018] As described above, the vehicle rear seat according to the present invention as set forth in claim 1 has the excellent effect of absorbing impact in the event of a cargo collision, preventing the seat back from tipping forward, while also enabling the seat frame to be made lighter.

[0019] The vehicle rear seat according to the present invention as set forth in claim 2 has the excellent effect of being able to widely distribute the collision load over the entire air bag while preventing damage to the air bag.

[0020] The vehicle rear seat according to the present invention as set forth in claim 3 has the excellent effect of ensuring a large luggage space when the seat back is stored.

[0021] The vehicle rear seat according to the present invention as set forth in claim 4 has the excellent effect of being able to compress the air bag evenly in the seat width direction.

[0022] The vehicle rear seat according to the present invention as set forth in claim 5 has the excellent effect of being able to automatically inflate an air bag that has been crushed by a collision load.

[0023] The vehicle rear seat according to the present invention as set forth in claim 6 exhibits the excellent effect of being able to automatically inflate the air bag when the seat back is returned to the upright position. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 2 is a left side view of the vehicle rear seat according to the embodiment in an upright position. [Figure 2] 2 is a left side view of the vehicle rear seat shown in FIG. 1 in a stowed position. FIG. [Figure 3] FIG. 2 is an enlarged perspective view of a main part of the vehicle rear seat shown in FIG. [Figure 4] 2 is a left side view showing a state in which a load in a luggage compartment collides with the rear seat for the vehicle shown in FIG. 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0025] 1 to 4, a vehicle rear seat 10 according to one embodiment of the present invention will be described below. Note that the arrows FR, UP, and RH shown as appropriate in each figure respectively indicate the front side, upper side, and right side in the left-right direction (width direction) 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 (width direction), respectively.

[0026] (Overall configuration of the vehicle rear seat 10) The vehicle rear seat 10 is a three-seater rear seat and includes a seat cushion 12 on which occupants sit, a seatback 14 that supports the backs of the occupants, and three headrests (not shown) that support the heads of the occupants. As an example, the vehicle rear seat 10 is divided 6:4 in the vehicle width direction into a right seatback (not shown) for two occupants and a left seatback 16 for one occupant. The vehicle rear seat 10 is a split-folding rear seat in which the right seatback (not shown) and the left seatback 16 can be folded forward separately. As shown in FIG. 1 , the vehicle rear seat 10 is disposed in a luggage compartment 18 at the front of the vehicle. The seat cushion 12 is fixed onto a vehicle floor 20.

[0027] The right seat back (not shown) and the left seat back 16 are configured to be lockable to the vehicle body side walls (not shown) in the upright positions, and by releasing the lock, the seats are rotated toward the front side and reclined onto the seat cushion 12, as shown in Fig. 2. The position of the left seat back 16 shown in Fig. 2 is referred to as the "storage position."

[0028] (Shock absorbing device 22) 1, the left seat back 16 is equipped with an impact absorbing device 22. The right seat back (not shown) is also equipped with an impact absorbing device, but since it has the same configuration as the left seat back 16 except for the size in the seat width direction, a description of the impact absorbing device for the right seat back will be omitted.

[0029] The impact absorbing device 22 is a device for protecting the left seat back 16 from cargo 24 (see Figure 4) loaded in the luggage compartment 18, and is composed of an air bag 26 arranged on the rear side of the left seat back 16 and a plate-shaped member 28 arranged further rearward of the air bag 26.

[0030] As shown in FIG. 3, air bag 26 is formed in a rectangular parallelepiped shape, with air vent 30 located on the left side of the seat. Air bag 26 is made of a strong fabric such as nylon, similar to a typical air bag. The rear surface of air bag 26 is fixed to the lower part of plate-like member 28. Note that the shape of the air bag is not limited to a rectangular parallelepiped shape. Furthermore, the air bag does not have to be fixed to the plate-like member. Furthermore, the position and number of air vents are not limited to those described above.

[0031] The plate-shaped member 28 is made of resin, for example, and is formed in a rectangular shape when viewed in the plate thickness direction. The plate-shaped member 28 covers the air bag 26 when viewed from the rear side of the seat back. A pair of left and right hinges 32 is provided at an upper end 28A of the plate-shaped member 28. The plate-shaped member 28 is rotatably connected to the upper back surface of the left seat back 16 (see FIG. 1) via the pair of left and right hinges 32.

[0032] A pair of left and right support members 34 are fixed to the vehicle floor 20 (see FIG. 1) at both left and right ends of the left seat back 16 (see FIG. 1). Each support member 34 includes a lower wall portion 34A fixed to the vehicle floor 20 and a vertical wall portion 34B erected from the inner end of the lower wall portion 34A in the seat width direction toward the upper side of the vehicle. Each support member 34 rotatably supports the lower end of the left seat back 16 at a rotation shaft (not shown) provided at the upper part of the vertical wall portion 34B. Note that the shape of the support members is not limited to the above.

[0033] The plate-like member 28 and the pair of left and right support members 34 are connected by a pair of left and right tension members, namely straps 36. The straps 36 are formed in a strip shape having a width of 2 to 3 cm, for example, and have a predetermined strength.

[0034] One end 36A of each strap 36 is fixed to the lower end 28B of the plate-shaped member 28, and the other end 36B of each strap 36 is fixed to a portion of the support member 34 below the pivot shaft (not shown). As a result, as shown in FIG. 2, when the left seat back 16 is placed in the stowed position, the lower end 28B of the plate-shaped member 28 is pulled toward the front of the seat back by the pair of left and right straps 36, causing air to escape through the air vents 30 (see FIG. 3), compressing the air bag 26. The other end of the tensioning member may be fixed directly to the vehicle floor. Alternatively, the other end of the tensioning member may be fixed to the seat cushion.

[0035] Furthermore, a compression coil spring 30 serving as a biasing member is disposed within the air bag 26. The front end of the compression coil spring 30 is fixed to the vertical and horizontal center of the front fabric portion 26A of the air bag 26, and the rear end of the compression coil spring 30 is fixed to the vertical and horizontal center of the rear fabric portion 26B of the air bag 26. As a result, when the left seat back 16 is raised from the stored position shown in FIG. 2 to the upright position shown in FIG. 1, the air bag 26 is inflated again.

[0036] (action) Next, the operation of this embodiment will be described.

[0037] In the vehicle rear seat 10 according to this embodiment, the left seatback 16 is stored by tilting onto the seat cushion 12, as shown in Fig. 2. As shown in Fig. 4, when cargo 24 loaded in the luggage compartment 18 of the vehicle attempts to collide with the left seatback 16 from the rear of the vehicle during sudden vehicle deceleration or a frontal collision, the air bag 26 disposed on the back side of the left seatback 16 acts as a buffer to absorb the collision load. This reduces the impact on the left seatback 16, thereby preventing the left seatback 16 from tipping forward. Furthermore, the air bag 26 is lighter than a metal protect bar or the like, allowing for a reduction in the weight of the vehicle rear seat 10.

[0038] Furthermore, with the vehicle rear seat 10 according to this embodiment, when the cargo 24 moves toward the front of the vehicle during sudden vehicle deceleration or a frontal collision, the cargo 24 collides with the plate-shaped member 28, and the impact is absorbed by the air bladder 26 on the front side of the vehicle. Here, because the plate-shaped member 28 covers the air bladder 26 when viewed from the rear side of the seatback, the impact of the cargo 24 is received by the surface of the plate-shaped member 28, and the collision load can be widely distributed throughout the air bladder 26. Furthermore, because the cargo 24 directly collides with the plate-shaped member 28, damage to the air bladder 26 can be prevented.

[0039] Furthermore, with the vehicle rear seat 10 according to this embodiment, when the left seatback 16 shown in FIG. 1 is tilted toward the front of the seat, the lower end 28B of the plate-shaped member 28 is pulled toward the front of the seatback by the strap 36, with the upper end 28A as the axis center. Here, because the air bag 26 is provided with the air vent 30 (see FIG. 3), with the air bag 26 sandwiched between the back of the left seatback 16 and the plate-shaped member 28, the lower end 28B of the plate-shaped member 28 is pulled toward the front of the seatback, and air inside the air bag 26 is discharged through the air vent 30. This causes the air bag 26 to compress, as shown in FIG. 2. Therefore, a large space can be secured in the luggage compartment 18 when the left seatback 16 is in the stowed position.

[0040] Furthermore, in the vehicle rear seat 10 according to this embodiment, the pair of left and right straps 36 pull the lower end portions 28B of the plate-like members 28 equally on the left and right. Therefore, the air bag 26 is compressed equally in the seat width direction by the plate-like members 28.

[0041] Furthermore, in the vehicle rear seat 10 according to this embodiment, the air bag 26 is inflated by the compression coil spring 30. Therefore, even if the air bag 26 is crushed by the collision load as shown in FIG. 4, it automatically returns to its original shape as shown in FIG.

[0042] Furthermore, with the vehicle rear seat 10 according to this embodiment, when the left seatback 16 is raised from the storage position shown in Fig. 2 to the upright position shown in Fig. 1, the force with which the strap 36 pulls the plate-shaped member 28 toward the front of the seatback weakens, and the air bag 26 is inflated by the biasing force of the compression coil spring 30. Therefore, when the left seatback 16 is returned to the upright position, the air bag 26 is inflated again. In other words, the air bag 26 can be automatically inflated when the left seatback 16 is returned to the upright position.

[0043] [Supplementary explanation of the above embodiment] In the above embodiment, the seat back 14 is described as being divided in a 6:4 ratio in the vehicle width direction, but this is not limited thereto. For example, the seat back may be divided in a ratio of 4:6, 5:5, or 4:2:4. Regardless of the division ratio, it is desirable that an impact absorbing device is provided in each divided seat back, but this is not limiting, and it is sufficient that an impact absorbing device is provided in at least one seat back in the vehicle width direction. Furthermore, the seat back does not have to be divided in the vehicle width direction.

[0044] Furthermore, in the above embodiment, the impact absorbing device 22 is described as being equipped with the plate-like member 28, but this is not limiting, and the vehicle rear seat does not have to be equipped with a plate-like member.

[0045] Furthermore, in the above embodiment, the upper end 28A of the plate-shaped member 28 is rotatably connected to the back surface of the left seatback 16, and the lower end 28B of the plate-shaped member 28 is pulled toward the front of the seatback by the pair of left and right straps 36, but this is not limiting. For example, the lower end of the plate-shaped member may be rotatably connected to the vehicle floor.

[0046] Furthermore, in the above embodiment, the air bladder 26 is described as having the vent hole 30 formed therein, but this is not limitative, and the air bladder may not have a vent hole formed therein.

[0047] In the above embodiment, the plate-like member 28 is described as being pulled by a pair of left and right straps 36, but this is not limited to this. For example, only one tension member or three or more tension members may be provided. In either case, however, it is desirable to arrange the tension members so that the air bag is compressed evenly in the seat width direction.

[0048] Furthermore, in the above embodiment, the compression coil spring 30 is described as being disposed inside the air bag 26, but this is not limited to this. For example, the biasing member may be disposed outside the air bag. Also, the biasing member is not limited to a compression coil spring, and may be any member that applies a biasing force. Furthermore, the vehicle rear seat does not necessarily have to be provided with a biasing member. [Explanation of symbols]

[0049] 10 Rear seat for vehicle 12 seat cushions 16 Left seat back (seat back) 18 Luggage compartment 26 Air bladder 28 Plate-shaped member 28A Upper end 28B Bottom end 30 ventilation holes 36 Strap (tensile member) 36A One end

Claims

1. a seat back disposed on a vehicle front side of a luggage compartment of the vehicle and configured to be tiltable onto a seat cushion; an air bag provided on the seat back side and arranged in an inflated state on the back surface of the seat back when the seat back is in the upright position; A rear seat for a vehicle having:

2. A plate-like member that covers the air bag when viewed from the rear side of the seat back is disposed on the rear side of the air bag. The rear seat for a vehicle according to claim 1.

3. an upper end of the plate-shaped member in the upright position is rotatably connected to a rear surface of the seat back; a tension member having one end fixed to a lower end of the plate-like member in the upright position, the tension member pulling the lower end toward the front of the seat back when the seat back is tilted toward the front of the seat; The air bag is provided with a vent hole. The rear seat for a vehicle according to claim 2.

4. A pair of the tension members are provided in the seat width direction, and the one end of each tension member is fixed to an end of the lower end of the plate-like member in the seat width direction. The rear seat for a vehicle according to claim 3.

5. A biasing member is provided to bias the air bag in a direction to inflate it.

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

6. A biasing member is provided to bias the air bag in a direction to inflate it.

5. The rear seat for a vehicle according to claim 3 or 4.

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