JP2019171957A - Steering wheel - Google Patents

Abstract

To provide a steering wheel characterized in that a latch spring for use in attaching an airbag system to a steering wheel body is disposed on the side of the airbag system.SOLUTION: A latch unit 10 is pushed and contracted in a longitudinally radial direction, and internally engaged with a spring receiving ring 3. In this state, latch claw plates 11 are pressed against the internal circumferential surface of the spring receiving ring 3 due to a constraining force of a latch spring 12. An airbag system 40 is brought close to a boss 34, and a pin 1 is inserted into a pin locking ring 37 through a pin insertion hole 36. The spring receiving ring 3 comes off the latch unit 10. The latch claw plates 11 are pushed into a latch groove 37c due to the resilience of the latch spring 12. The airbag system 40 is coupled to the boss 34.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a steering wheel, and more particularly to a steering wheel having a horn switch function in which an airbag device advances and retreats in a steering axis direction.

  As a conventional example in which an airbag device having a horn switch function is attached to an airbag device attachment portion of a steering wheel by a snap-in method, there is Patent Literature 1 (Japanese Patent No. 5797770).

  In the airbag apparatus mounting structure of Patent Document 1, a pin protrudes from the back surface of the airbag apparatus, and the tip side of this pin is inserted into the insertion hole of the steering wheel body. The tip of the pin is a taper, and when the pin is inserted into the insertion hole, the U-shaped latch spring moves along the taper and eventually the spring engages with a groove near the tip of the pin. A bag device is attached to the steering wheel.

  A coil spring surrounding the pin is interposed between the steering wheel main body and the retainer in an accumulated state, and the airbag device is always urged in a direction away from the steering wheel main body. When the airbag device is pressed in the direction toward the steering wheel body, the contact portions of the horn switch come into contact with each other and the switch is turned on, and the horn sounds.

Japanese Patent No. 5797770

  An object of the present invention is to provide a steering wheel in which a latch spring for attaching the airbag device to the steering wheel body is provided on the airbag device side.

  In one aspect of the present invention, an object of the present invention is to provide a steering wheel in which a contact of a horn switch is disposed inside an airbag device.

  The steering wheel of the present invention includes a steering wheel main body, an airbag device facing the steering wheel main body, a connecting device that connects the airbag device to the steering wheel main body so as to be accessible, and steering the airbag device. A spring disposed between the airbag device and the steering wheel body so as to urge the wheel body away from the wheel body, and the coupling device projects from the airbag device toward the steering wheel body. In a steering wheel having a pin and the spring wound around the pin, a latch unit is provided on the front end side in the protruding direction of the pin. The latch unit includes a latch claw plate and the latch claw plate And a latch spring that urges the lever in the radial direction. Is urged Tchibane is characterized in that it engages the latching groove of the steering wheel body.

  In one aspect of the present invention, the latch claw plate has a fan shape, a groove extending in the circumferential direction is provided on an inner peripheral surface, a plurality of latch claw plates are arranged in a ring shape, and the C-shaped A latch spring is engaged with the groove of each latch claw plate.

  In one aspect of the present invention, the two semicircular arc-shaped latching claw plates are arranged in a ring shape, and the latch spring made of a coil spring biases the two latching claw plates in the separating direction.

  In one aspect of the present invention, a spring receiving ring capable of holding the latch unit in a reduced diameter state is fitted on the pin until the airbag device is mounted on the steering wheel body, and one end side of the spring is Abutting on the spring receiving ring.

  In one aspect of the present invention, the airbag device includes a retainer to which an airbag and an inflator are attached, and the pin passes through an opening provided in the retainer.

  In one aspect of the present invention, a slide bush is attached to the opening of the retainer, and the pin is inserted through the slide bush.

  In one aspect of the present invention, the slide bush is provided with a damper that contacts the flange of the pin.

  In one aspect of the present invention, a cover is provided on the retainer so as to face the flange portion, and a horn switch contact portion is provided on each of the cover and the pin.

  In one aspect of the present invention, the pin is provided with a concave hole portion, and the cover is provided with a convex portion capable of moving forward and backward within the concave hole portion, and the horn is provided in each of the concave hole portion and the convex portion. A switch contact portion is provided.

  In one aspect of the present invention, a pin locking ring is attached to the pin insertion hole of the steering wheel body, and the latch groove is provided in the pin locking ring.

  In the present invention, the latch spring is provided in the airbag device, and the configuration of the steering wheel body is simple.

It is a disassembled perspective view of the steering wheel which concerns on embodiment. It is a perspective view of a steering wheel concerning an embodiment. It is sectional drawing of a part of steering wheel at the time of airbag apparatus attachment. It is sectional drawing of a part of steering wheel after an airbag apparatus attachment. It is a partial expanded sectional view of a steering wheel when pushing an airbag device. It is a perspective view of a latch unit. It is a perspective view which shows another example of a latch unit. It is a cross-sectional perspective view which shows a pin and a latch unit.

  The embodiment will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the steering wheel 30 is obtained by attaching an airbag device 40 to a steering wheel main body 31. The steering wheel main body 31 has a wheel portion 32, a spoke portion 33, and a boss portion 34 (core metal portion). The airbag device 40 is urged in a direction away from the boss portion 34 by a spring (coil spring) 35 interposed between the airbag device 40 and the boss portion 34.

  The boss portion 34 has a pin insertion hole 36 and a steering wheel mounting hole 38 provided at the center of the boss portion 34.

  The airbag device 40 includes a retainer 41, an inflator 42 and an airbag (not shown) attached to the retainer 41, a module cover 44 that covers the airbag, and the like.

  The airbag (not shown) is folded and attached to the retainer 41 with a bolt 46 together with the inflator 42. When the inflator 42 ejects gas during a vehicle collision, the airbag is inflated, and the module cover 44 is cleaved and deployed.

  The airbag device 40 is connected to the boss portion 34 via the pin 1 and the latch unit 10. This connection structure will be described with reference to FIGS.

  The pin 1 circulates around a substantially cylindrical pin body 1a, a flange 1b provided at an end of the pin body 1a on the airbag device side (hereinafter referred to as an upper end), and an outer periphery near the tip of the pin body 1a. And a latch unit mounting groove 1c.

  A tapered portion 1d is provided at the tip of the pin body 1a. A concave hole 1e is provided in the center of the rear end surface of the pin 1. An insulating cylinder 4 is installed along the inner peripheral surface of the concave hole 1 e, and a horn switch contact portion 5 is provided along the inner peripheral surface of the insulating cylinder 4.

  A spring receiving ring 3 is fitted on the distal end side of the pin body 1a. A spring 35 surrounds the pin body 1a on the upper end side of the ring 3.

  As shown in FIG. 6, the latch unit 10 includes a plurality of (three in this embodiment) latch claw plates 11 and a latch spring 12 that holds the latch claw plates 11, 11, 11 in an annular shape. The latch claw plate 11 has a sector shape, and a groove 11a is provided on the inner peripheral surface in the circumferential direction. Three latching claw plates 11 are arranged in a ring shape, and a latch spring 12 is engaged with a groove 11 a of each latching claw plate 11. The latch spring 12 is C-shaped, and the latch claw plate 11 can be advanced and retracted in the radial direction of the latch claw plates 11, 11, 11.

  The latch unit 10 is fitted in the groove 1 c of the pin 1. In a state before the airbag device 40 is attached to the boss portion 34, the latch unit 10 is fitted into the spring receiving ring 3 as shown in FIG. 3.

  The retainer 41 is provided with a concave accommodating portion 45 for accommodating the flange 1 b of the pin 1. The accommodating portion 45 includes a peripheral wall portion 45a, a bottom surface portion 45b, an opening 45c provided in the center of the bottom surface portion 45b, and a claw locking hole 45d provided in the bottom surface portion 45b.

  A slide bush 15 is provided so as to overlap the bottom surface portion 45b. The slide bush 15 is fixed to the bottom surface portion 45b by engaging the claw portion 15a provided on the slide bush with the claw locking hole 45d. A rubber ring-shaped damper 16 is mounted on the flange portion 1 b side of the inner peripheral edge of the slide bush 15. The damper 16 protrudes slightly toward the flange portion 1 b from the upper surface of the slide bush 15. The slide bush 15 and the damper 16 are slidably fitted to the pin body 1a.

  A cover 20 made of synthetic resin is disposed so as to cover the accommodating portion 45. The cover 20 includes a plate portion 21 that covers the housing portion 45 and a claw portion 22 that protrudes from the outer peripheral edge of the plate portion 21. The cover 20 is fixed to the retainer 41 by engaging the claw portion 22 with a claw locking hole 41 a provided in the retainer 41.

  A cylindrical convex portion 23 is provided from the central portion of the plate portion 21 into the concave hole 1e. A horn switch contact portion 24 is provided along the inner peripheral surface of the convex portion 23. A part of the horn switch contact portion 24 is exposed to the outer peripheral surface of the convex portion 23 through a window hole-like opening (reference numeral omitted) of the convex portion 23.

  A pin locking ring 37 is fixed to the pin insertion hole 36 of the boss portion 34. The pin locking ring 37 includes a cylindrical portion 37a, a flange 37b provided on one end side of the cylindrical portion 37a, and a latch groove 37c provided around the inner peripheral surface of the cylindrical portion 37a. . A step portion 36 a is provided on the inner peripheral surface of the pin insertion hole 36. The pin locking ring 37 is inserted into the pin insertion hole 36 and fixed so that the flange 37b abuts on the stepped portion 36a. The inner diameter of the cylindrical portion 37a in the upper portion of the latch groove 37c is slightly larger than the outer diameter of the pin body 1a.

  In order to attach the airbag device 40 to the boss portion 34, the latch unit 10 is compressed in the longitudinal direction as shown in FIG. In this state, the latch claw plates 11, 11, 11 are pressed against the inner peripheral surface of the spring receiving ring 3 by the urging force of the latch spring 12. The spring 35 is interposed between the spring receiving ring 3 and the slide bush 15 in a slightly compressed state.

  The airbag device 40 is brought close to the boss portion 34, and the pin body 1 a of the pin 1 is inserted into the pin locking ring 37 from the pin insertion hole 36. Then, the spring receiving ring 3 comes into contact with the flange portion 37b of the pin locking ring 37, and the ring 3 slides toward the flange portion 1b along the pin main body portion 1a while pressing and shrinking the spring 35. When the pin 1 is further pushed into the pin locking ring 37, the groove 1c and the latch groove 37c face each other, and the spring receiving ring 3 is detached from the latch unit 10, and the latch claw plates 11, 11, 11 are moved as shown in FIG. The latch spring 12 is pushed into the latch groove 37 c by the restoring force of the latch spring 12. Thereby, the pin 1 is fixed with respect to the boss | hub part 34, and cannot advance / retreat to a pin axial direction. As a result, the airbag device 40 is attached to the boss portion 34.

  In this state, the spring 35 is interposed between the spring receiving ring 3 and the slide bush 15 in a power storage state (elastic state), and urges the airbag device 40 in a direction away from the boss portion 34. .

  When the airbag device 40 is pushed to sound the horn, the spring 35 is pressed and contracted as shown in FIG. 5, and the airbag device 40 approaches the boss portion 34. Since the pin 1 is immovable in the axial direction, the retainer 41 moves to the boss portion 34 side, and the slide bush 15 and the damper 16 are separated from the flange 1b. And the convex part 23 of the plate 21 penetrates deeply into the concave hole part 1e, the horn switch contact parts 5 and 24 come into contact with each other, and the horn blows. When the hand is released from the airbag device 40, the urging force of the spring 35 returns to the state shown in FIG. 3 and the horn stops.

  To remove the airbag device 40 from the airbag device attached state of FIG. 4, a jig is inserted from a through-hole (not shown) provided in the pin locking ring 37 and the latch claw plate 11 is moved in the centripetal direction. And is released from the latch groove 37c. When the airbag device 40 is pulled away from the boss portion 34 in this state, the pin 1 is detached from the pin insertion hole 36 and the airbag device 40 is removed from the boss portion 34.

  In the present invention, as shown in FIG. 7, as a latch unit, a latch unit 10A which can urge two latch pawl plates 11A, 11A having a substantially semicircular arc shape in a separating direction by a latch spring 12A made of a coil spring. It may be used. The latch unit 10A having the latch spring 12A is attached to a pin 1A having a diametric hole 1h shown in FIG. The latch spring 12A is inserted into the diameter direction hole 1h. The other configuration of the pin 1A is the same as that of the pin 1, and the same reference numerals denote the same parts.

  The above-described embodiment is an example of the present invention, and the present invention may be configured other than illustrated.

1, 1A Pin 1a Pin body 1b Flange 1c Latch for mounting latch unit 3 Spring receiving ring 5 Horn switch contact portion 10, 10A Latch unit 11, 11A Latch claw plate 12, 12A Latch spring 15 Slide bush 16 Damper 20 Cover 23 Protrusion 24 Horn Switch Contact 30 Steering Wheel 31 Steering Wheel Body 32 Wheel 33 Spoke 34 Boss 35 Coil Spring (Spring)
37 Pin locking ring 37c Latch groove 40 Air bag device 41 Retainer

Claims (10)

A steering wheel main body, and an airbag device facing the steering wheel main body,
A connecting device for connecting the airbag device to the steering wheel body so as to be accessible;
A spring disposed between the airbag device and the steering wheel body so as to bias the airbag device in a direction away from the steering wheel body;
The coupling device has a pin projecting from the airbag device toward the steering wheel body, and the spring is wound around the pin.
A latch unit is provided at the front end side of the pin in the protruding direction, and the latch unit includes a latch claw plate and a latch spring that urges the latch claw plate in a radial direction.
A steering wheel, wherein the latch claw plate is biased by a latch spring and is engaged with a latch groove on the steering wheel main body side.   The latch claw plate is fan-shaped, and a groove extending in the circumferential direction is provided on the inner peripheral surface. A plurality of latch claw plates are arranged in a ring shape, and the C-shaped latch spring is connected to each latch claw plate. The steering wheel according to claim 1, wherein the steering wheel is engaged with the groove.   2. The two latching claw plates having a semicircular arc shape are arranged in a ring shape, and the latch spring made of a coil spring urges the two latching claw plates in a separating direction. Steering wheel. A spring receiving ring that can hold the latch unit in a reduced diameter state is fitted around the pin until the airbag device is mounted on the steering wheel body,
4. The steering wheel according to claim 2, wherein one end side of the spring is in contact with the spring receiving ring. The airbag device has a retainer to which an airbag and an inflator are attached,
The steering wheel according to claim 4, wherein the pin passes through an opening provided in the retainer.   6. The steering wheel according to claim 5, wherein a slide bush is mounted in the opening of the retainer, and the pin is inserted through the slide bush.   The steering wheel according to claim 6, wherein a damper that abuts on a flange of the pin is provided on the slide bush. A cover is provided on the retainer so as to face the flange portion,
The steering wheel according to claim 5, wherein a horn switch contact portion is provided on each of the cover and the pin. The pin is provided with a concave hole portion, and the cover is provided with a convex portion that can advance and retreat within the concave hole portion,
The steering wheel according to claim 8, wherein the horn switch contact portion is provided in each of the concave hole portion and the convex portion. A pin locking ring is attached to the pin insertion hole of the steering wheel body,
The steering wheel according to claim 1, wherein the latch groove is provided in the pin locking ring.

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