JPH04135944A - Mounting structure for air bag device - Google Patents

Abstract

PURPOSE:To quickly make the pressure in a car-room equal to external atmospheric pressure by means of a simple structure by moving a base plate on the opposite side to the direction of expansion of an air bag body by making use of reaction force generated at the time of operating a gas generator, thereby pressing a cover body to open a hole part. CONSTITUTION:A hole part 22 is formed to a side wall 21, which separates the inside of a room from the outside, and is close to the mounting position of the base plate 13 of an air bag device 11, and a cover body 24 is mounted to the hole part. Both end parts 13a of the base plate 13 is mounted so that they can move in the opposite side to the direction of expansion of an air bag body 17 at the time when a gas generator 15 is operated. When the gas generator 15 is operated, a reaction force acts in the opposite direction to the direction of expansion of the air bag body 17, both end parts 3a of the gas generator 15 and the base plate 13 are moved in the direction of the arrow (a) against a coil spring 35, and a projection 37 formed at the rear end of the base plate 13 or the gas generator 15 presses the cover body 24 fitted on the hole part 22 to release the engagement of the engaging claws 25 of the cover body 24 with the outer peripheral edge of the hole part 22 and to open the hole part 22.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a mounting structure for an airbag device. More specifically, the present invention relates to a mounting structure for an airbag device. More specifically, the present invention relates to a mounting structure for an airbag device. The present invention relates to a mounting structure for an airbag device that includes a generator and an airbag body that expands when the gas generator operates.

[Prior Art] Airbag devices have been known as protection devices for occupants of vehicles and the like. Japanese Patent Publication No. 56-43890 describes this airbag system, in which a gas generator is fixed to a base plate attached to a fixed side of an instrument panel, steering wheel, etc., and the airbag body with a gas inlet is a retainer. It is fixed with bolts and nuts through the airbag, and when the gas generator is activated under predetermined conditions, gas momentarily flows into the airbag body, causing the airbag body to inflate instantly. ing.

It also automatically adjusts the increase in the pressure inside the vehicle cabin due to the inflation of the airbag body, and prevents the occupants from feeling uncomfortable due to a sudden increase in the indoor pressure, and from causing damage to the occupants' bodies. There is Japanese Patent Publication No. 47-26620.

[Problems to be Solved by the Invention] However, the vehicle interior pressure regulating device disclosed in Japanese Patent Publication No. 47-26620 detects a collision using a collision sensor, and uses this detection signal to unlock the trunk door of the trunk room and open the trunk door. The air circulation valve of the communication device formed between the front seat and the rear seat must be opened, and the transmission path of the detection signal from the collision sensor is long, and the trunk door is unlocked until the trunk door is opened. It takes time, and communication cannot be achieved unless the air circulation valve is opened, the mechanism is complicated, the operation is unreliable, and the cost increases.

An object of the present invention is to provide an airbag device with excellent safety and economy, which has a simple configuration and can quickly equalize the pressure inside the vehicle interior with the outside pressure without employing means such as unlocking the trunk door. This provides a mounting structure.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned problems, and includes a base plate attached to a stationary side of a vehicle body, a gas generator fixed to the base plate, and an operation of the gas generator. In the mounting structure for an airbag device, the base plate is movably mounted on a fixed side of a vehicle body in a direction opposite to the direction in which the airbag body expands when the gas generator is activated; A hole is formed in a side wall that separates the indoor and outdoor areas near the mounting position of the base plate, a lid is attached to the hole, and the hole shielded by the lid is opened when the base plate is moved. It is characterized by being made to obtain.

[Effect]

According to the present invention, the base plate is attached so as to be movable in the direction opposite to the direction in which the airbag body expands when the gas generator is activated, and the indoor and outdoor areas are connected to the side wall adjacent to the attachment position of the base plate. A communicating hole is formed,
This hole is fitted with a cover body to prevent communication with the outside under normal conditions, and the base plate is used to expand the airbag body using the reaction force generated when the gas generator is activated. The second base plate can be moved in the opposite direction, and the hole can be opened by pressing the lid body based on the movement of the second base plate, so that the pressure inside the vehicle can be made equal to the outside pressure before the airbag body is inflated. Even after the airbag body is inflated, the pressure inside the vehicle does not increase, and there is no risk of causing discomfort to the occupant or damaging the occupant's seat.

〔Example〕

The mounting structure of the airbag device according to the present invention will be described in detail below with reference to the drawings.

1 to 3 each schematically show an embodiment of a mounting structure for an airbag device according to the present invention, and the airbag device 11 includes a base plate 13 that is attached to a fixed side of a vehicle body, and a base plate 13 that is attached to a fixed side of a vehicle body. The airbag body 17 is provided with a gas generator 15 fixed to the airbag 13, and an airbag main body 17 which is inflated as shown by the imaginary line in FIG. 1 when the gas generator 15 is operated.

A hole 22 is formed in a side wall 21 that separates the interior of the vehicle near the mounting position of the base plate 13 from the exterior of the engine compartment, and as shown in an enlarged view in FIG. 2, this hole 22 is normally shielded. A lid body 24 is attached. A locking claw 25 is formed on the lid body 24, and the locking claw 25 is locked to the outer peripheral edge of the hole 22. Note that the lid body 24 is not limited to the illustrated shape and structure, and can be modified as appropriate.

A pair of mounting brackets 31 are formed on the fixed side of the vehicle body, and the pair of mounting brackets 31 are provided with the hole 22 sandwiched therebetween. As shown in FIG. 3, a support portion 33 having a substantially U-shaped cross section is formed at the tip of the mounting bracket 31, a coil spring 35 is inserted into this support portion 33, and both ends 13a of the base plate 13 are supported by this support portion 33. Supported.

Further, as shown in FIG. 4, a pin 36 fitted with a coil spring 35 is attached to the support portion 33, and a pin 36 is inserted into the six portions 13b formed at both ends 13a of the base plate 13.
Both ends 13a of the base plate 13 can also be supported movably along the pins 36. Note that an E ring 39 is attached to the tip of the pin 36 to prevent the pin 36 from falling off the support portion 33.

Both ends 13a of the base plate 13 are attached so as to be movable in a direction opposite to the direction in which the airbag body 17 expands when the gas generator 15 is activated. A protrusion 37 is formed on the rear end of the base plate 13 or the gas generator 15, and the protrusion 37 is attached to the lid body 24 in the hole 22.
It is formed opposite to.

Note that the support portion 33 that supports both ends 13a of the base plate 130 is not limited to the shape and structure shown in the drawings, and an appropriate elastic member such as a rubber material may be provided in place of the coil spring 35. Some members can also be omitted.

Furthermore, although the protrusion 37 is arranged to face the lid 24, an operating rod that operates in response to the movement of the base plate 13 may be used, or this operating rod may be formed on the lid 24 side.

In such a configuration, when the gas generator 15 is activated due to a vehicle collision or the like, a reaction force acts in the direction opposite to the direction in which the airbag body 17 expands (in the direction of arrow a), and the gas generator 1
5 and both ends 13a of the base plate 13 move in the direction of arrow a against the coil spring 35, and the base plate 13
Alternatively, the protrusion 37 formed at the rear end of the gas generator 15 presses the lid 24 fitted into the hole 22, and the locking state between the locking claw 25 of the lid 24 and the outer periphery of the hole 22 is controlled. Release and hole 2
2 is in an open state. By opening the hole 22, it is possible to prevent the pressure inside the vehicle from increasing.

[Effects of the Invention] The above is the configuration of an embodiment of the airbag device according to the present invention. A base plate is attached in a movable state, and a hole is formed in the side wall near the mounting position of the base plate to communicate the indoor and outdoor areas, and this hole is fitted with a lid to provide communication with the outside during normal times. In addition, the base plate is moved in the direction opposite to the expansion direction of the airbag body by using the reaction force generated when the gas generator is activated, and the lid body is moved based on the movement of the base plate. Since the hole can be opened by pressing the airbag, the pressure inside the vehicle can be made equal to the outside pressure before the airbag body is inflated, and the pressure inside the vehicle does not increase even after the airbag body is inflated. 3. It is possible to obtain an airbag device mounting structure that is simple in structure, has high reliability of operation, and has excellent safety and economical efficiency without causing discomfort to the occupants or damaging the occupant's frame. .

[Brief explanation of drawings]

1 to 3 each schematically show an embodiment of the mounting structure for an airbag device according to the present invention, and FIG. 1 is a cross-sectional view showing the entire mounting state of the airbag device, and FIG. 3 is a sectional view of the hole and the lid, FIG. 3 is a partial sectional view of the base plate attached, and FIG. 4 is a partial sectional view of a different embodiment of the support portion. In the figure, 11... Airbag device, 13... Base plate, 15... Gas generator, 17... Airbag body, 21... Side wall, 22... Hole, 24... Lid body, 25...Latching claw, 31...Mounting bracket, 3
3...Support part, 35...Coil spring, 36...Pin, 37...Protrusion. sect

Claims (1)

[Claims] (1) A base plate attached to the fixed side of the vehicle body,
In the mounting structure for an airbag device including a gas generator fixed to the base plate and an airbag body that expands when the gas generator is activated, the base plate is attached to the base plate so that the airbag body expands when the gas generator is activated. It is attached to the fixed side of the vehicle body so as to be movable in a direction opposite to the direction in which the base plate is disposed, a hole is formed in a side wall that separates the indoor and outdoor areas near the attachment position of the base plate, and a lid body is attached to the hole. A mounting structure for an airbag device, characterized in that the hole covered by the lid can be opened when the base plate is moved.