JP3928310B2 - Airbag device installation structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure in which an airbag device is attached to a steering wheel, and more particularly to an installation structure of an airbag device in which the airbag device can be easily attached to and detached from a steering wheel.
[0002]
[Prior art]
Japanese Patent Laid-Open No. 9-183354 discloses a structure in which an airbag device is attached to a steering wheel in a one-touch manner. In this structure, a pin is erected rearward in the airbag device, and the tip of the pin is a tapered tapered portion, and a detent made of a circumferential groove is provided following the tapered portion. It has been.
[0003]
The steering wheel is provided with a locking hook for locking the detent of this pin. When a pin is inserted into this locking hook and the detent is locked, the pin cannot be removed from the locking hook, and the airbag device is fixed to the steering wheel.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide an installation structure of an airbag device that can be easily removed as well as mounted on a steering wheel.
[0005]
[Means for Solving the Problems]
The installation structure of the airbag device of the present invention is a structure in which the airbag device (10) is installed on the steering wheel (26), and a pin (32) having a detent is provided on one of the two, On the other hand, an air is provided with an insertion hole (12h) of the pin (32) and a locking device (30) for locking the detent of the pin (32) inserted into the insertion hole (12h). In the installation structure of the bag device, the pin (32) can be rotated around its axis, and when the pin (32) is turned, the pin (32) and the locking device (30) are locked. The pin (32) has a flat tip shape (32b) in the insertion direction thereof, and the tip (32b) of the pin (32) has a flat plate shape. The taper shape widens toward the rear in the insertion direction, A small-diameter portion (32c) is provided following the tapered tip portion (32b), and a step portion is provided at the boundary between the tip portion (32b) and the small-diameter portion (32c). The locking device (30) is a detent, and the locking device (30) is disposed on both sides of the pin (32) and is a pair of plates (movable in a direction perpendicular to the insertion direction of the pin (32)). 34, 34), a recess (34a) that can be engaged with the small-diameter portion (32c) of the pin (32) provided on the opposite side of the plates (34, 34), and the plate (34, 34). 34) a spring (42) that urges the plates to approach each other, and the opposite sides of the plates (34, 34) that are approached to the approach limit by the spring other than the recesses (34a, 34a) between the ends of parts, flat in front of the pin (32) Is characterized in that by thickness Redirecting a listening interval of the end portion (32 b) is free.
[0006]
In the airbag apparatus installation structure of the present invention, the airbag apparatus can be detached from the steering wheel by turning the pin.
[0007]
In the present invention, the locking device is disposed on both sides of the pin, and is provided on a pair of plates capable of moving back and forth in a direction orthogonal to the insertion direction of the pin, and on opposite sides of the plates. engageable with recesses in the small-diameter portion of the pin, ing a spring for urging so as to approach the plate to each other. In the above structure, quadrature is moved toward the air bag device to the steering wheel, the pin is inserted into interpolation hole of the locking device, this time, the plate is pushed by the pin and pin insertion direction Retreat in the direction. When the pin is inserted deeply enough to interpolation holes, plates and backward by being pushed by the spring, the recess of each plate engages the small diameter portion of the pin. Thereby, an airbag apparatus is attached to a steering wheel.
[0008]
The pin is locked by the plate that moves forward and backward in the direction of crossing the pin and the spring that urges the plate in the backward movement direction, so that the insertion of the pin becomes smooth and the pin is pulled out. Definitely blocked.
[0009]
In the present invention, this pin is the distal end of the insertion direction flat plate shape, and the tip portion of the pin has a tapered shape widening toward the rear of the insertion direction, the tapered the small diameter portion is provided have continued pulling on the tip, and the step portion is provided at a boundary between the tip portion and the small diameter portion, that has become the detent step portion.
[0010]
In the present invention, in order to prevent rattling of the air bag device, it is preferable that pressing springs are provided to press the plate to the stepped portion.
[0011]
In the present invention, it is preferable that a convex portion is protruded from the airbag device, particularly the retainer, and this convex portion is inserted into the insertion port of the steering wheel and locked. It is preferable that the insertion direction of the convex portion is substantially perpendicular to the insertion direction of the pin.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing an installation structure of an airbag device according to an embodiment (showing the airbag device and the left half of the steering wheel), and FIGS. 2 and 3 are exploded perspective views showing this structure. -8 are perspective views showing the engagement relationship between the pin and the pin locking device. Incidentally, illustration of the cover 40 of the pin locking device 30 in FIGS. 4 to 6 is omitted, the internal configuration of the locking device 30 is shown.
[0013]
The airbag device 10 includes a retainer 12, a folded airbag 14, a module cover 16 that covers the airbag 14 and is connected to the retainer 12, an inflator 18, and the like.
[0014]
The tip side of the inflator 18 protrudes forward of the retainer 12 through the central opening 12a of the main plate surface of the retainer 12, and is provided with a gas outlet 18a on the outer periphery thereof. The inflator 18 has a flange 18 b fixed to the retainer 12 with a bolt 20 and a nut 22.
[0015]
The peripheral edge of the gas inlet of the airbag 14 is sandwiched between the ring 24 and the retainer 12. The bolt 20 is implanted in the ring 24, and the bolt 20 passes through the bolt insertion hole 201 of the retainer 12 and the bolt insertion hole 202 of the flange 18 b of the inflator, and the nut 22 is tightened, thereby the airbag. 14 and the inflator 18 are fixed to the retainer 12. When the inflator 18 is actuated due to a vehicle collision or the like, the airbag 14 is inflated and the module cover 16 is cleaved, and the airbag 14 is largely deployed in front of the driver's seat occupant.
[0016]
The module cover 16 has spoke engaging portions 161 and 162. The spoke engaging portion 161 is disposed on the left and right sides of the module cover 16, and the spoke engaging portion 162 is disposed on the lower side portion of the module cover 16.
[0017]
From the back surface of the module cover 16, left and right leg pieces 163, an upper leg piece 164, and a lower leg piece 165 are projected, and these leg pieces 163 to 165 are The four sides of the folded airbag 14 are enclosed.
[0018]
A protruding piece 166 protrudes from the leg piece portions 163 to 165, and an opening 167 is provided in the protruding piece 166. The retainer 12 is provided with a through hole 126 into which the protruding piece 166 is inserted. A tongue piece 127 projects into the through-hole 126.
[0019]
When the module cover 16 is put on the retainer 12 and the protruding piece 166 is inserted into the through-hole 126, the elastic tongue 127 is bent in the insertion direction and the protruding piece 166 is inserted into the through-hole 126. When the projecting piece 166 is inserted sufficiently deep into the through-hole 126, the elastic tongue piece 127 enters the opening 167 due to its elasticity, and the module cover 16 is locked to the retainer 12.
[0020]
An elastic ring 25 is mounted along the back surface of the retainer 12 in order to prevent the protruding piece 166 from bending inward, that is, toward the inflator 18 and the tongue piece 127 from coming off the opening 167. Since the elastic ring 25 presses each protrusion 166 outward, that is, in a direction away from the inflator 18, the protrusion 166 is prevented from bending inward. On the back surface of the retainer 12, a protrusion 12c for positioning the elastic ring 25 is provided.
[0021]
A convex portion 300 is provided on the upper side of the retainer 12, and an insertion port 301 into which the convex portion 300 is inserted is provided on the steering wheel 26. The convex portion 300 protrudes in a direction substantially perpendicular to the axis of the steering wheel.
[0022]
The airbag device 10 is attached to the steering wheel 26 so as to be movable in the extension line direction of the steering column, that is, in the direction of arrow F in FIG. 1 by the convex portion 300, the insertion port 301, and the locking device 30. The locking device 30 includes a pin 32 erected on a surface 26p perpendicular to the F direction of the steering wheel 26, a plate 34 attached to the retainer 12 so as to lock the pin 32, and the retainer 12. A spring 36 or the like that biases the surface 26p away from the surface 26p is provided.
[0023]
The pin 32 is provided with a small-diameter portion 32a on the base end side, the small-diameter portion 32a is inserted into a through hole 26h provided in the steering wheel 26, and can be rotated around its axis by an E-ring 33. Is attached. The pin 32 extends in a direction parallel to the F direction, and is inserted into the pin insertion hole 12 h of the retainer 12. A groove for inserting the tip of a tool such as a minus driver extends in the diameter direction on the rear end surface of the small diameter portion 32a.
[0024]
The tip 32b of the pin 32 has a flat plate shape and has a substantially trapezoidal taper shape widening toward the rear , and a small diameter portion 32c is provided over the required length following the tapered tip 32b. The large-diameter portion 32d is provided following the small-diameter portion 32c.
[0025]
As clearly shown in FIGS. 4 to 8, two plates 34 are arranged in a rectangular frame-shaped portion 38 provided in the retainer 12. These plates 34 and 34 are urged by springs 42 and 42 toward each other. A semicircular recess 34 a is formed on the opposite sides of the plates 34, 34, and the edge of the recess 34 a is an engagement edge that engages with the outer periphery of the pin 32. Note that between the plates 34, 34 in close proximity to the proximity limit by the spring 42 (between portions between the non-recessed portion 34a), a large distance slightly is free than the thickness of the flat plate-like tip portion 32 b of the pin 32.
[0026]
A cover 40 is fixed to the frame-shaped portion 38 so that the frame-shaped portion 38 holds the plate 34. The cover 40 covers the entire frame-shaped portion 38, whereby the plate 34 is slidably held in the frame-shaped portion 38. The cover 40 is provided with an insertion port 40 a for the pin 32.
[0027]
In order to attach the airbag device 10 to the steering wheel 26, the pin 32 erected on the steering wheel 26 is arranged in a direction in which the plate surface of the flat tip portion 32 b connects the plates 34 and 34 (advancing and retracting direction of the plate 34). The posture is in the direction along. Further, a spring 36 is fitted on the pin 32. And after inserting the convex part 300 in the insertion port 301, this pin 32 is inserted in the pin insertion hole 12h, and the back surface of the airbag apparatus 10 is steered so that it may enter in the recessed parts 34a and 34a of the plates 34 and 34. The airbag device 10 is mounted on the steering wheel 26 by approaching the wheel 26 and locking the pin 32 to the plates 34 and 34.
[0028]
4-7, when the pin 32 is inserted into the hole 12h, the tapered tip 32b of the pin 32 enters between the recesses 34a and 34a of the plates 34 and 34, and the plates 34 and 34 are separated. The pin 32 is inserted between the plates 34 and 34 while allowing them to move. When the leading end portion 32b of the tapered passes between plates 34 and 34, plates 34 and 34 move in the approaching direction by the spring 42, recesses 34a, 34a is engaged with the small diameter portion 32c of the pin 32. Since the airbag apparatus 10 is pressed by the spring 36, the plate 34 is pressed against the stepped surface of the distal end portion 32b and the small diameter portion 3 2c of the pin 32, the airbag apparatus 10 is stationary. In this embodiment, therefore, has a stepped surface detent of the rear surface of the tip portion 32b, also the street recess 34a, the edges of 34a is in the engagement edge to Ri stop said return.
[0029]
Thus, the airbag apparatus 10 is attached to the steering wheel 26 with a single touch. At the time of mounting, the plates 34, 34 slide smoothly along the retainer 12 within the frame-shaped portion 38, so that the airbag apparatus 10 can be mounted smoothly. After the airbag device 10 is mounted, since the plates 34 and 34 are pressed by the spring 42, the pin 32 is securely locked.
[0030]
The airbag device 10 is pressed upward by a spring 36 in FIG. When the airbag device 10 is pushed downward in FIG. 1 along the F direction, the airbag device 10 moves so that the plate 34 is separated from the tip end portion 32 b of the pin 32 . And a horn sounds when the horn switch contact part 44 contacts.
[0031]
In order to remove the airbag device 10 from the steering wheel 26, the pin 32 is turned about 90 ° to the left or right about its axis as shown in FIG. 8 using a tool such as a minus driver. Then, the flat tip portion 32b of the pin 32 can pass through the gap between the plates 34 and 34. Therefore, pulling in the direction of separating the airbag apparatus 10 from the scan tearing wheel 26, since the plate 34 is disengaged from the distal end portion 32b of the pin 32, the air bag device by withdrawing the protrusion 300 from the outlet 301 10 is separated from the steering wheel 26.
[0032]
【The invention's effect】
As described above, according to the present invention, the airbag apparatus can be smoothly attached to the steering wheel and securely locked. Further, the airbag device can be easily detached from the steering wheel, and the airbag device can be quickly maintained and disposed of.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a driver airbag device according to an embodiment of the present invention.
2 is an exploded perspective view showing the configuration of FIG. 1. FIG.
3 is an exploded perspective view showing the configuration of FIG. 1. FIG.
FIG. 4 is a perspective view showing an attachment procedure of the airbag device in the embodiment.
FIG. 5 is a perspective view showing an attachment procedure of the airbag device in the embodiment.
FIG. 6 is a perspective view showing an attachment procedure of the airbag device in the embodiment.
FIG. 7 is a perspective view showing a procedure for attaching the airbag device in the embodiment.
FIG. 8 is a perspective view showing a removed state of the airbag device in the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Driver airbag apparatus 12 Retainer 14 Airbag 16 Module cover 18 Inflator 24 Ring 26 Steering wheel 30 Locking device 32 Pin 32b Tip part 32c Small diameter part 32d Large diameter part 34 Plate 34a Concave part 36 Spring 38 Frame part 40 Cover 42 Spring 300 Convex 301 Insert

Claims (4)

The airbag device (10) is installed on the steering wheel (26),
One of the two is provided with a pin (32) having a detent, and the other is provided with an insertion hole (12h) of the pin (32) and the pin (32) inserted into the insertion hole (12h). In the installation structure of the airbag device provided with the locking device (30) for locking the detent,
The pin (32) is rotatable about its axis, and when the pin (32) is turned, the lock between the pin (32) and the locking device (30) can be released. The installation structure of the device,
The tip (32b) of the pin (32) in the insertion direction has a flat plate shape, and the tip (32b) of the pin (32) has a tapered shape that widens toward the rear in the insertion direction. And
Subsequent to the tapered tip portion (32b), a small diameter portion (32c) is provided, and a step portion is provided at the boundary between the tip portion (32b) and the small diameter portion (32c). It has become a detent,
The locking device (30) includes a pair of plates (34, 34) disposed on both sides of the pin (32) and capable of moving forward and backward in a direction orthogonal to the insertion direction of the pin (32).
A recess (34a) that is engageable with the small diameter portion (32c) of the pin (32), provided on opposite sides of the plates (34, 34);
A spring (42) for biasing the plates (34, 34) closer to each other,
Of the opposing sides of the plates ( 34, 34) that have been approached to the limit by the spring, between the portions other than the recesses (34a, 34a), the flat tip portion (32) of the pin (32) ( installation structure of an air bag device characterized by thickness by Redirecting a listening interval 32 b) is free.   In Claim 1, the installation structure of the airbag apparatus characterized by the spring (36) which presses the said plate (34) so that it may press on the said level | step-difference part is provided.   In Claim 1 or 2, the convex part (300) protrudingly provided from the airbag device (10) is inserted into the insertion port (301) of the steering wheel (26) and locked. Installation structure of the airbag device.   The installation structure of the airbag device according to claim 3, wherein the insertion direction of the convex portion (300) is substantially perpendicular to the insertion direction of the pin (32).

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