JPH04135942A - Air bag device for rear seat - Google Patents

Abstract

PURPOSE:To positively hold passengers seated on the rear seats without narrowing a car-room space by forming room-pressure reducing hole parts to the partition wall in the neighborhood of the mounting part of an air bag device, and shielding the room-pressure reducing hole parts with a covering member. CONSTITUTION:Room-pressure reducing hole parts 4a, 7a are formed to the partition wall 4 and seat backs 7 formed between a car-room 2 and a trunk room 3, and the hole parts 4a to which an air bag device 11 is mounted, is usually shielded and sealed by the base plate 13 of the air bag device 11, a gas generator 15, and a covering member 21. When the gas generator 15 is operated, the covering member 21 is broken, and the air bag body 17 expands after the hole part 4a becomes open. At the time when the air bag body 17 expands, the room 2 and the trunk room 3 are communicated through the hole part 4a with each other to prevent the rise in atmospheric pressure in the room 2.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an airbag device for rear seats, and more specifically, the present invention relates to an airbag device for rear seats. The present invention relates to a rear seat airbag device that holds an occupant by expanding an airbag body.

[Prior Art] Various airbag devices have been proposed to protect occupants in the event of a vehicle collision, among which airbag devices installed on the steering wheel or instrument panel side protect occupants in the front seats. It is set up. In addition, as an airbag device to protect rear seat passengers,
As shown in Japanese Patent Publication No. 8 and Japanese Patent Publication No. 51-31580, an air bag device is incorporated on the back side of the upper part of the seat hack of the front seat.

In addition, multiple airbag devices such as front seat and rear seat airbag devices and door side airbag devices are installed, and if the airbag bodies of these airbag devices are inflated all at once, the pressure inside the vehicle will increase. 9, causing discomfort to passengers,
Or, since there is a risk of damage to the ears, eyes, etc. of the occupants,
As shown in Japanese Patent No. 6620, it has been proposed to employ a configuration that communicates the inside of the vehicle with the outside of the vehicle.

[Problem B to be solved by the invention] When an airbag device for protecting rear seat occupants is disposed on the back side of the upper part of the seat bag of the front seat, the thickness of the upper part of the seat back increases significantly, which causes damage to the vehicle. This had the disadvantage of narrowing the indoor space.

Furthermore, in the vehicle interior pressure rise prevention device disclosed in Japanese Utility Model Publication No. 51-15243, the interior of the vehicle is communicated with the outside through the mesh of the package tray, the trunk room, and the opening of the slit, but the communication is constant. However, it has the drawbacks that the temperature control efficiency in the vehicle interior deteriorates and the sound insulation effect deteriorates.

In addition, in the vehicle interior pressure adjustment device disclosed in Japanese Patent Publication No. 47-26620, a collision is detected by a collision sensor, and the detection signal is used to unlock the trunk door of the trunk room, which is formed between the trunk room and the rear seat. The air flow valve of the communication device must be open,
The transmission path of the detection signal from the collision sensor is long, and it takes time to open the trunk door after unlocking it.Furthermore, communication cannot be achieved unless the air circulation valve is opened, which causes the mechanism to fail. This method has the drawbacks of being complicated, lacking operational reliability, and increasing costs.

The purpose of the present invention is to be able to securely hold rear seat passengers without constricting the interior space of the vehicle, to eliminate vibrations that deteriorate temperature control efficiency and sound insulation, and to have a simple configuration that can quickly reduce the air pressure in the vehicle interior. An object of the present invention is to provide an airbag device for a rear seat that can be made equal to the outside air pressure and has excellent safety and economical efficiency.

(Means for Solving the Problems) The present invention has been made in view of the above-mentioned problems, and includes an airbag device attached to a partition wall provided between a vehicle interior and a trunk room, and a mounting portion of the airbag device. The present invention is characterized in that an indoor depressurizing hole is formed in the peripheral partition wall to communicate the vehicle interior and the trunk room, and the indoor depressurizing hole is shielded by a cover member of the airbag device.

[Effect]

According to the present invention, an indoor depressurization hole is formed in the partition wall around the mounting portion of the airbag device to communicate the vehicle interior and the trunk room, and the indoor depressurization hole is shielded by the cover member of the airbag device. Therefore, under normal conditions, the vehicle interior and trunk room are kept in a sealed state by the cover member, and when the airbag device is activated, the cover member breaks or opens, and the indoor depressurization hole opens.
The interior of the vehicle and the trunk are communicated with each other, preventing the pressure inside the vehicle from increasing, and the airbag body can hold the rear seat occupant.

(Example) Hereinafter, a rear seat airbag device according to the present invention will be described in detail with reference to the drawings.

1 to 3 schematically show an embodiment of the rear seat airbag device according to the present invention, and the rear seat airbag device 11 is located between the vehicle interior 2 and the trunk room 3. In this embodiment, it is attached to a partition wall 4 provided, and in this embodiment, it is attached at a position where a center armrest in the middle of a bench-type rear seat 5 is normally provided. This airbag device 11
The base plate 13 is fixed to the partition wall 4, the gas generator 15 is fixed to the base plate 13, and due to the operation of the gas generator 15, the planar path expands into a T-shape as shown by the imaginary line in FIG. The airbag body 17 is provided with an airbag main body 17 that is released. Note that the reference numeral 6 in FIG. 1 is a front seat.

The partition wall 4 and the seat back 7 formed between the vehicle interior 2 and the trunk room 3 are provided with holes 4a and 7a for indoor depressurization.
are formed in the holes 4a of the partition wall 4, and the airbag device 1
1 is attached, and this hole 4a is normally attached to the base plate 13.1 of the airbag device 11. It is shielded by the gas generator 15 and two cover members to be in a sealed state. Note that when the base plate 13 and the gas generator 15 are attached to the partition wall 4, the vehicle interior 2 and the trunk room 3 are in communication through the hole 4a, and a cover member 21 that covers the airbag body 17 in a folded state is attached. This brings the hole 4a into a sealed state.

Further, the cover member 21 may be fixed to the partition wall 4 or the base brake 13, or may be fixed to the opening of the hole 7a of the seat back 7 on the side of the vehicle interior 2.

The cover member 21 may be made of a synthetic resin material, the hole 4a of the partition wall 4 may be opened when the gas generator 15 is operated, and the center portion of the front side 21a of the cover member 21 may be broken. Alternatively, as shown in FIG. 3, the hole portion 4a may be opened by rotating around the pivot portion 21b at the lower end.

In such a configuration, when the gas generator 15 is activated due to a collision of a vehicle or the like, the cover member 21 is broken or rotated to open the hole 4a, and then the airbag body 17 expands. At the time of expansion, the vehicle interior 2 and the trunk room 3 are in communication via the hole 4a, and it is possible to prevent the interior of the vehicle from increasing by 20 atmospheres. It should be noted that the trunk room 3 and the outside air pressure can be communicated with each other through an appropriate gap or a slit, or even if they are not in communication, by communicating between the passenger compartment 2 and the trunk room 3, the atmospheric pressure in the passenger compartment 2 can be reduced. It is possible to sufficiently prevent the rise.

[Effects of the Invention] The above is the configuration of an embodiment of the rear seat airbag device according to the present invention. According to this configuration, the partition wall around the mounting portion of the airbag device can be connected to the passenger compartment and the trunk room. Since the interior depressurization hole is formed to communicate with the airbag, and the interior depressurization hole is shielded by the cover member of the airbag device, under normal conditions, the vehicle interior and the trunk room are kept in a sealed state by the cover member, and the airbag When the device is activated, the cover member is broken or opened, and the interior depressurizing hole is opened, allowing communication between the vehicle interior and the trunk room, thereby preventing the pressure inside the vehicle interior from increasing. In addition, the bulging airbag body can hold the rear seat occupants, providing outstanding safety.There is no risk of deteriorating the temperature control efficiency or sound insulation effect in the vehicle interior, and the structure is simple and economical. A rear seat airbag device can be obtained.

[Brief explanation of drawings]

1 to 3 each schematically show an embodiment of the rear seat airbag device according to the present invention, and FIG. 1 is an explanatory plan view of the vehicle showing the entire installed state of the airbag device; Second
The figure is a partially enlarged plan explanatory view of the same, and FIG. 3 is a side explanatory view of the same. In the diagram, 2...vehicle interior, 3...trunk room, 4...
... Bulkhead, 4a... Hole for indoor decompression, 5... Rear seat, 7... Seat back, 7a... Hole, 11...
・Airbag device, I3...Base plate, 15・
...Gas generator, 17...Airbag body, 21...
・Cover member. Figure 1

Claims (1)

[Claims] (1) An airbag device is attached to a partition wall provided between the vehicle interior and the trunk room, and a hole for indoor depressurization is formed in the bulkhead around the mounting portion of the airbag device to communicate the vehicle interior and the trunk room. . An airbag device for a rear seat, characterized in that the indoor pressure reduction hole portion is shielded by a cover member of the airbag device.