JPH081152Y2 - Air bag equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an air bag device for protecting an occupant by expanding an air bag bag during sudden deceleration of a vehicle.

[Prior Art] In recent years, an air bag device has been proposed which protects an occupant by expanding an air bag bag when the vehicle is suddenly decelerated.

This type of air bag device is provided with a restraining means for restraining the activation member for inflating the air bag bag body so that the air bag bag body does not expand even if an impact is applied before it is attached to the steering wheel. Then, after the air bag device is attached to the steering wheel, the activation member is activated.

As shown in FIG. 8, in the conventional air bag device, a moving member (not shown) is provided in the inflator 100, and when the release pin 102 is pushed into the inflator 100, the restraint of the moving member is released and the operating state is achieved. In the release pin 102, when the slide body 104 is moved to the right in the figure, the slope 104A formed at the tip end engages with the slope 102A formed on the release pin 102, thereby releasing the release pin 10.
2 is configured to be pushed into the inflator 100.

However, as also shown in FIG. 9, the slope 102A of the release pin 102 is a plane formed at a predetermined angle with respect to the axis,
When the release pin 102 rotates in the holder 106, it slides.
The slope 104A of 104 does not abut the slope 102A of the release pin 102, and there is a risk that the release pin 102 will not move in the approaching direction of the restraint means (direction of arrow A in FIG. 8).

Therefore, when assembling the inflator 100, the slant surface 104A of the slide body 104 and the slant surface 102A of the release pin 102 must be assembled so as to correspond to each other. There is a problem that it is not efficient.

[Problems to be Solved by the Invention] In consideration of the above facts, an object of the present invention is to provide an air bag device which can be assembled quickly and easily.

[Means for Solving the Problems] In the present invention, a releasing member that releases the operation blocking state of the air bag device main body by axial movement, and a slope portion that moves in a direction intersecting the axial direction of the releasing member serves as a releasing member. A slider for moving the release member to a state where the release of the air bag device main body is released by contacting the release member, wherein one end of the release member that abuts the sloped surface of the slide member is tapered. It is configured to have a shape.

[Operation] When the slide body comes into contact with the release member by an operation of an operator, the release member moves in the axial direction, the air bag apparatus main body is released from the operation blocking state, and the air bag bag body becomes inflatable. Since one end of the releasing member for releasing the operation blocking state of the air bag device main body is tapered, even if the stopping position around the axis of the releasing member is not constant, the slanted surface of the slide body that abuts the one end is The air bag device can be attached without always considering the positional relationship between the slide body and the releasing member by always contacting the tapered portion of the releasing member at the same angle.

[First Embodiment] FIGS. 1 to 6 show a first embodiment of an air bag device according to the present invention.

As shown in FIG. 6, in the air bag apparatus main body 10, the base plate 12 is supported by the support plate 13 substantially parallel to the hub 14A of the steering wheel 14. An air bag bag 16, a cover 18, and an inflator 20 are attached to the base plate 12.

The air bag body 16 is attached to the occupant side of the base plate 12 (6th
It is arranged in a folded state (upper side in the figure). The edge of the air bag bag body 16 on the opening side is attached to a substantially central portion of the base plate 12 via a ring plate 22.
Ring plate 22 is a base plate with bolts not shown
It is fastened to 12, and the edge of the air bag bag body 16 on the opening side is pressed against the base plate 12.

The cover 18 is on the occupant side of the base plate 12 (upper side in FIG. 6).
The air bag bag is placed between the base plate 12 and
Stores 16 A frame-shaped cored bar (not shown) is embedded in the periphery of the cover 18, and is attached to the base plate 12 by rivets or the like via the cored bar. A thin portion 24 is formed at a portion of the cover 18 facing the base plate 12,
It is easily broken at this part.

The inflator 20 has a cylindrical shape, and is arranged in a state of being inserted into the air bag bag body 16 while penetrating substantially the central portion of the base plate 12. The inflator 20 has a flange on the outer circumference.
20A is formed, and the base plate 12
Is fixed to the surface on the side opposite to the occupant (lower side in FIG. 6).

A gas generating substance 26 is enclosed in the inflator 20 and a starting device for burning the gas generating substance 26.
28 built-in.

The gas generating substance 26 is decomposed by combustion to release a large amount of gas, and the gas causes the air bag bag body 16 to expand. Around the gas generating substance 26, a starting device 28
A detonator 30 (shown in FIG. 5) is installed around the
When the gas explodes, an igniting agent (not shown) ignites to burn the gas generating substance 26.

As shown in FIG. 5, the starting device 28 has a block 34 fixed inside a housing 32, and an ignition pin 36 supported by the block 34 and attached thereto.

The ignition pin 36 is supported so as to be movable in the axial direction (vertical direction in FIG. 5), and its tip is moved to the housing 32 by the movement in the axial direction.
Through the through hole 32A formed in the
You can explode 0. The ignition pin 36 is urged toward the detonator 30 by the compression coil spring 40, and the collar portion 42 is formed, and the drive shaft 44 is locked to the collar portion 42 to resist the urging force of the compression coil spring 40. Is held in non-contact with the detonator 30.

The drive shaft 44 is arranged so as to be orthogonal to the ignition pin 36, the middle portion is cut out in a substantially semicircular shape, and the circular arc portion 46 of this cutout portion is locked to the flange portion 42 of the ignition pin 36. The drive shaft 44 is rotatably supported by the block 34, and the rotation causes the arc portion 46 to be disengaged from the flange portion 42 of the ignition pin 36, and the ignition pin 36 to be detonated by the biasing force of the compression coil spring 40.
To collide with.

A lever 48 is integrally fixed to an intermediate portion of the drive shaft 44, and can be rotated by swinging the lever 48.

Two levers 48 are provided (see FIGS. 3 and 4), and the biasing force of the compression coil spring 50 is applied to one end of each of these levers 48, and the ball 52 as a starting member is linked to the other end thereof. ing.

The ball 52 is supported by the block 34 in a state of being housed in the cylinder 54, and moves in the direction of arrow B in FIG. 5 while swinging the lever 48 against the urging force of the compression coil spring 50 by inertial force when the vehicle rapidly decelerates. It is like this. The swing of the lever 48 at this time rotates the drive shaft 44 so that the arc portion 46 of the drive shaft 44 is disengaged from the flange portion 42 of the ignition pin 36.

Around this lever 48, as shown in FIGS. 3 and 4, a lock bar 60 as a restraining means is supported by the block 34 so as to be movable in the axial direction (vertical direction in FIGS. 3 and 4). The lock bar 60 has a configuration in which a pair of flexible pieces 60B are branched from the base portion 60A, and the flexible piece 60B moves on the swing locus of the lever 48 by moving in the axial direction (vertical direction in FIGS. 3 and 4). It is arranged so that it can move forward and backward. Therefore, the flexible piece 60B can prevent the lever 48 from swinging by advancing on the swing locus of the lever 48.

The lock bar 60 is made of a flexible coil by a compression coil spring 62.
The 60B is urged in the direction of advancing on the swing locus of the lever 48 (downward in FIGS. 3 and 4) and the lock shaft
64 is linked and moves against the urging force of the compression coil spring 62 via the lock shaft 64, the flexible piece 60B moves to the lever 48.
It is possible to exit from the swing trajectory of.

The lock shaft 64 is a protrusion 56 protruding from the block 34.
The lock piece 60 is supported by a pin insertion hole 58 formed in the lock cover 60 by axial movement so that the flexible piece 60B of the lock cover 60 can be withdrawn from the swing path of the lever 48. Further, as shown in FIG. 1, a holder insertion recess 57 into which a holder 68 is inserted is formed on the projection 56 coaxially with the pin insertion hole 58.

As shown in FIG. 1, a release pin 66 as a release member is supported in a holder 68 standing on the support plate 13 so as to be movable in the axial direction. The holder 68 penetrates an opening 70 formed in the raised portion 13A of the support plate 13 fixed to the hub 14A of the steering wheel 14, and a flange portion 72 is provided between the raised portion 13A of the support plate 13 and the hub 14A. The flange portion 72 is arranged and is movable in the direction orthogonal to the axis.

As shown in FIG. 2, the cylindrical portion 68D of the holder 68 is formed with a pair of guide portions 76 that are parallel to each other and project in the radial direction. A slide body 74 is inserted into the guide portion 76, and the slide body 74 is advanced in the axial direction of the holder 68 to release the release pin housed in the holder 68.
66 moves axially. The release pin 66 has a tip portion 66C penetrating through a hole 68A formed in an axial portion of the holder 68 to press the lock shaft 64 in the axial direction. Further, the base portion 66A of the release pin 66 is formed in a conical shape in which the sharpened portion faces the direction of the hub 14A of the steering wheel 14, and the tapered surface 66B of the base portion 66A is a sloped surface portion 74A formed at the tip portion of the slide body 74. The slide member 74 is formed in such an angle that it can be brought into contact with the slide member 74 in the direction of arrow B in FIG.

A threaded hole 75 is formed in the tongue piece 13A hanging from a part of the support plate 13, and a slide body is formed in this threaded hole 75.
The threaded portion 82A of the long pin 82 that slides the 74 in the direction of the release pin 66 is screwed.

 Next, the operation of the first embodiment will be described.

When the air bag device body 10 is attached to the steering wheel 14, an operator holds the air bag device body 10 and brings the holder insertion recess 57 of the protrusion 56 of the inflator 29 close to the holder 68 supporting the release pin 66. The holder 68 is attached to the hub 14A by the support plate 13 in advance. Then, the holder insertion recess 57 and the holder 68 are made to correspond to each other, and then the inflator 20 is pressed against the steering wheel 14. In this case, even if the holder insertion recess 57 and the holder 68 are not completely aligned with each other, the holder 68 can move in the direction intersecting the axis, so that if the holder 68 is partly inserted into the holder insertion recess 57, the holder 68 will not move. Holder insertion recess 57
The holder 68 can be easily inserted into the holder insertion recess 57 because the holder 68 is moved so as to match with.

In this state, the tip portion 66C does not largely project from the holder 68, and thus the operation-inhibited state of the inflator 20 is still maintained.

Then, after attaching the air bag device body 10 to the steering wheel 14 using a fixing means (not shown), the long pin 82 is rotated to slide the slide body 74 in the direction of the release pin 66 (direction of arrow B in FIG. 1).

In this case, since the base portion 66A of the release pin 66 has a conical shape, even if the rotation stop position around the axis of the release pin 66 is indefinite, the sloped portion 74A of the slide body 74 has the release pin 66.
It becomes possible to engage with the tapered surface 66B of the base portion 66A at the same angle.

Therefore, since it is not necessary to hold the rotation stop position of the release pin 66 at a specific position when the air bag device body 10 is assembled, the work of assembling the air bag device body 10 can be performed quickly and easily.

Then, by inserting the slide body 74, the release pin 66 is pushed up by the slide body 74. As a result, as shown in FIG. 4, the release pin 66 abuts the lock shaft 64, and the lock bar 60 moves against the biasing force of the compression coil spring 62 as the lock shaft 64 moves.

As a result, the flexible piece 60B of the lock bar 60 is brought into the state shown in FIG. 4, so that the lever 48 and the ball 52 can be moved, the operation-inhibited state of the inflator 20 is released, and when the predetermined acceleration acts, the ball 52 is The drive shaft 44 is rotated by rotating the lever 48. Therefore, the locking of the ignition pin 36 and the drive shaft 44 is released, the ignition pin 36 collides with the detonator 30 by the biasing force of the compression coil spring 40, the gas generating substance 26 burns, and the air bag bag body 16 expands. Protect passengers.

[Second Embodiment] FIG. 7 shows a second embodiment of the air bag device according to the present invention.

As shown in FIG. 7, in this embodiment, the release pin 66 is held by the inflator 20 unlike the first embodiment.

That is, as shown in FIG. 7, the holder 68 for accommodating and supporting the release pin 66 is fitted and fixed in the holder insertion recess 57 formed in the projection 56 of the inflator 20.

On the inflator side of the base portion 66A of the release pin 66, a locking portion 66C is formed so as to project from the taper surface 66B in a direction orthogonal to the axial direction of the release pin 66. In addition, a protruding piece that prevents the release pin 66 from falling out of the holder 68 by locking with the locking portion 66C in the holder 68.
68B is formed.

Therefore, even in the case where the release pin 66 is attached to the inflator 20 as in this embodiment, the slide member
It is not necessary to attach while paying attention to the contact relationship between the inclined surface portion 74A of 74 and the tapered surface 66B of the release pin 66.

Therefore, also in this embodiment, the work of mounting the air bag device can be performed quickly, and the workability can be improved.

In the first and second embodiments, the base of the release pin 66
Although 66A has a conical shape, it is not limited to the conical shape, and the slant surface of the slide body 74 such as a truncated cone or a quadrangular pyramid.
It is sufficient that the inclined surface with which 74A can smoothly contact is formed all around the base 66A.

[Advantages of the Invention] As described above, in the air bag device according to the present invention, when the air bag device is assembled, the air bag device can be attached to the mounting portion without having to worry about the positional relationship between the release member and the slide body. Therefore, there is an effect that the workability of attaching the air bag device can be improved.

[Brief description of drawings]

1 to 6 show a first embodiment of an air bag device according to the present invention.
FIG. 1 is a partial sectional view of a holder and a slide body, FIG. 2 is an overall perspective view of the holder and the slide body, FIG. 3 is a sectional view of an activating device, and FIG. Fig. 3 is an operation diagram, Fig. 5 is a sectional view taken along line VV in Fig. 4, Fig. 6 is a sectional view of an air bag device attached to a steering wheel, and Fig. 7 is a second part of the air bag device according to the present invention. FIG. 8 shows a partial sectional view of a holder and a slide body corresponding to FIG. 1, FIG. 8 and FIG. 9 show a conventional air bag device, and FIG. FIG. 9 is a perspective view of a slide body and a release pin. 10 …… Air bag device body, 14 …… Steering wheel, 66 …… Release pin, 66D …… Tapered surface, 68 …… Holder, 74 …… Slide body, 74A …… Slope surface.

Continuation of the front page (56) References Kaihei 3-35853 (JP, U) Kaikai Hei 2-105059 (JP, U) Japanese Patent 7-17176 (JP, B2) Japan Kohei 7-41640 (JP , Y2)

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A release member for releasing the operation blocking state of the air bag apparatus main body by axial movement, and the release member by moving in a direction intersecting with the axial direction of the release member so that the slope portion comes into contact with the release member. And a slide body for moving the main body of the air bag apparatus to an operation blocking release state of the air bag apparatus main body, wherein one end of the release member that comes into contact with an inclined surface of the slide body is tapered. Air bagging device.