JP5109541B2 - Steering wheel assembly - Google Patents

Description

  The present invention relates to a steering wheel assembly, and more particularly to a steering wheel assembly configured to push a horn pad to blow a horn.

  Japanese Patent Laid-Open No. 8-91229 discloses a steering wheel assembly in which a horn pad is attached to a steering wheel and the horn is blown by pushing the horn pad.

  In Japanese Patent Laid-Open No. 8-91229, the horn pad is attached to the steering wheel by a stepped screw so as to advance and retract. The horn pad is urged in the contact opening direction of the horn switch by a horn spring made of a leaf spring.

When the horn pad is pressed by hand, the contact of the horn switch comes into contact and the horn switch is turned on. When the hand is released from the horn pad, the horn pad moves back to its original position (advance) by the repulsive force of the horn spring, and the horn switch is turned off.
JP-A-8-91229

  In JP-A-8-91229, the number of members for pad attachment is large, resulting in an increase in weight and cost. Moreover, it is necessary to press the horn pad against the steering wheel against the repulsive force of the horn spring while the horn pad is attached, and it is easy to take time for attaching the horn pad.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a steering wheel assembly that has a simple structure for attaching a horn pad, can reduce weight, and can be easily attached to a horn pad.

The steering wheel assembly of the present invention (Claim 1) is provided with a horn switch in which a horn pad is attached to the steering wheel so as to be movable back and forth in the axial direction of the steering column, and a contact is brought into and out of contact with the horn pad. is a steering wheel assembly spring biasing the horn pad in the direction of separating the said contact is provided, horn plate having a horn pad mounting hole is attached to the steering wheel, the horn pad Is provided with a plurality of mounting pieces that are inserted in the horn pad mounting holes so as to be able to advance and retreat and that can be elastically deformed in the radial direction of the horn pad mounting holes. A claw portion engaged with the edge of the hole is provided to prevent deformation of the mounting pieces in the approaching direction. Retracted blocking body is mounted to said horn pad, the spring is a coil spring, is disposed surrounding the mounting piece, retractable dynamic blocking member is a stepped bolt, to the horn pad Each mounting piece is erected from the horn pad in a direction parallel to the axis of the steering column and toward the steering wheel, and a plurality of the mounting pieces are provided. It is inserted in the common horn pad mounting hole, and the mounting pieces inserted in the common horn pad mounting hole are arranged at intervals in the circumferential direction of the horn pad mounting hole. The mounting pieces inserted into the horn pad mounting holes can be elastically deformed in the direction in which the leading ends in the standing direction approach and separate from each other. The claw portion protrudes in a direction away from the mounting pieces inserted into the horn pad mounting hole, and the claw portion is engaged with the edge of the horn pad mounting hole on the steering wheel side, The spring is disposed so as to surround the mounting pieces inserted into the common horn pad mounting hole, and is inserted into the common horn pad mounting hole among the side surfaces of the steering wheel of the horn pad. In a region surrounded by the mounting pieces, a stepped bolt screwing hole is provided, and the stepped bolt is coaxial with the cylindrical portion and the cylindrical portion from one end side in the axial direction of the cylindrical portion. And a screw rod portion having a diameter smaller than that of the cylindrical portion, and the screw rod portion is screwed into the stepped bolt screwing hole and inserted into the common horn pad mounting hole. Between the mounting pieces Since the cylindrical portion is arranged, deformation of the mounting pieces inserted into the common horn pad mounting hole in the approaching direction is always restricted by the cylindrical portion, and the claw portions of the mounting pieces are connected to the horn. The stepped bolt is inserted into the horn pad mounting hole after each mounting piece is inserted into the horn pad mounting hole. The stepped bolts are screwed into the holes for screwing the stepped bolts through the mounting pieces, and the stepped bolts are not protruding from the front end side of the mounting pieces to the steering wheel side. It is a feature.

  In the steering wheel assembly of the present invention, the mounting piece provided on the horn pad is inserted into the horn pad mounting hole of the horn plate of the steering wheel so as to be able to advance and retract, and the claw portion of this mounting piece is the edge of the mounting hole. The mounting structure of the horn pad is simplified, the weight of the steering wheel assembly can be reduced, and the cost such as the member cost can be reduced.

  Further, when the mounting piece is inserted into the horn pad mounting hole, the claw portion of the mounting piece engages with the edge of the mounting hole, so that the mounting work is facilitated. In addition, since a retraction prevention body is attached to a horn pad, the nail | claw part of an attachment piece does not detach | leave from the edge part of an attachment hole.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a cross-sectional view of a steering wheel assembly according to an embodiment (a cross-sectional view taken along a line II in FIG. 4), and FIG. 2 is a perspective view showing an engagement relationship between a horn pad and a horn plate; FIG. 3 is a sectional view showing the engagement relationship between the horn pad and the horn plate, and FIG. 4 is a plan view from the back side of the assembly of the horn pad and the horn plate. In FIG. 2, the shape of the guide bush 30 is schematically shown.

  In the following description, the up-down direction and the left-right direction refer to the up-down direction and the left-right direction in the steering wheel surface when the steering wheel is viewed from the occupant side in a state where the steering wheel is in a steering posture when the vehicle is traveling straight.

  A horn pad 10 is installed on the front side (occupant side) of the central hub portion 2 of the steering wheel 1 so as to be able to advance and retract in the axial direction of the steering column (not shown). The hub portion 2 is connected to the tip of a steering shaft (not shown). In this embodiment, the spoke portions 3 extend from the hub portion 2 to the left and right and downward, and the tip side of each spoke portion 3 is connected to the ring portion 4 on the outer periphery of the steering wheel 1. The ring part 4 is provided with a synthetic resin molding 5. A horn plate mounting anchor portion 6 projects from the hub portion 2.

  The horn pad 10 is made of synthetic resin and is attached to the steering wheel 1 via a horn plate 20.

  The horn plate 20 includes a main plate portion 21 that faces the hub portion 2, a support piece 22 that rises from the main plate portion toward the passenger, and a leg piece that stands from the main plate portion 21 to the opposite side of the passenger. 23. The support piece 22 has an L-shape composed of a vertical piece rising from the main plate portion 21 and an overhanging piece projecting outward from the vertical piece (radially with respect to the steering column axis). A horn plate mounting hole 24 and a contact 25 on the horn switch ground side made of a contact rivet are provided in the projecting piece. The horn plate 20 is made of metal such as iron.

  A guide bush 30 made of insulating synthetic resin is mounted in the horn plate mounting hole 24. As shown in FIG. 3, the guide bush 30 is mounted in the mounting hole 24 by sandwiching the edge portion of the horn plate mounting hole 24 from both sides with flange portions 31 and 32. The guide bush 30 has a short tubular portion 33 extending toward the occupant side.

  A base portion 11 is provided on the back surface of the horn pad 10 so as to face each support piece 22, and an attachment piece 12 is erected from the base portion 11 in a direction parallel to the steering column axis. . Three attachment pieces 12 are provided to be inserted into each guide bush 30. Each attachment piece 12 has a configuration in which three slits are cut into a tubular body in a direction parallel to the tube axis direction.

  A claw portion 12 a that engages with a back side (opposite side of the occupant) edge portion of the guide bush 30 is provided on the leading end side of each mounting piece 12 in the standing direction. Each mounting piece 12 can be elastically deformed in a direction in which each tip side approaches and separates. The base portion 11 is provided with a hole 13 coaxially with the guide bush 30.

  The base portion 11 is provided with a contact 15 that contacts and separates from the ground-side contact 25.

  The mounting piece 12 is inserted into the guide bush 30 with a horn spring 50 made of a coil spring interposed between the support piece 22 and the base portion 11. In this embodiment, the horn spring 50 is disposed coaxially with the guide bush 30 so as to surround the three attachment pieces 12 and is externally fitted to the short tubular portion 33. The horn spring 50 is interposed between the guide bush 30 and the base portion 11 in an accumulative state compressed and contracted.

  When the claw portion 12a passes through the guide bush 30, each attachment piece 12 is elastically deformed in the approaching direction. When the claw portion 12 a is pulled out to the back side of the guide bush 30, each mounting piece 12 is elastically restored to the original shape, and the claw portion 12 a is engaged with the edge portion on the back side of the guide bush 30.

  In order to prevent the attachment pieces 12 from retreating in the approaching direction, a stepped bolt 40 is inserted between the attachment pieces 12 as a retraction prevention body and screwed into the hole 13 of the horn plate 10. The stepped bolt 40 has a cylindrical portion 41 and a small-diameter screw rod portion 42 that is coaxially projected from the tip of the cylindrical portion 41, and the screw rod portion 42 is screwed into the hole 13. . By disposing the cylindrical part 41 between the mounting pieces 12, deformation of the mounting pieces 12 in the approaching direction is prevented, and the claw part 12 a is always engaged with the edge on the back side of the guide bush 30. Become.

  After the horn pad 10 and the horn plate 20 are integrated through the mounting piece 12 in this way, the integrated piece is placed at the center of the steering wheel 1 so that the leg piece 23 overlaps the anchor portion 6 of the steering wheel 1. The steering wheel assembly is configured by arranging and screwing the bolt 27 through the anchor portion 6 into the leg piece 23 and connecting it to the steering wheel 1.

  In this steering wheel assembly, when the horn pad 10 is pushed, the contacts 15 and 25 come into contact with each other, and the horn sounds. When the hand is released from the horn pad 10, the horn pad 10 is returned to the original position by the horn spring 50, the contact points 15 and 25 are opened, and the horn is stopped.

  In this embodiment, the garnish 60 is attached to the ring portion 4 of the steering wheel 1 together with the steering audio switch 62 by screws 61. The garnish 60 is for concealing the gap between the ring portion 4 and the horn pad 10, and extends inward of the steering wheel 1 to the lower side of the support piece 22.

  Thus, in the steering wheel assembly of this embodiment, the horn pad 10 is attached to the steering wheel 1 via the guide bush 30, the stepped bolt 40, the horn plate 20, and the bolt 27, and the horn pad is attached. The number of parts for use is small. When the horn pad 10 is attached to the steering wheel 1, the horn spring 50 is externally fitted to the attachment piece 12, the attachment piece 12 is inserted into the guide bush 30, and the horn pad 10 is engaged with the horn plate 20. The stepped bolt 40 is screwed into the horn pad 10 so that the horn plate 20 and the horn pad 10 are integrated, and then the integrated object is simply attached to the steering wheel 1 with the bolt 27, and the operation is simple.

  In particular, in this embodiment, after the claw portion 12 a is passed through the guide bush 30 and the claw portion 12 a is locked to the edge of the guide bush 30, the horn spring 50 is connected to the guide bush 30 and the base portion of the horn pad 10. 11. Therefore, when fastening the horn pad 10 and the horn plate 20 to the steering wheel 10 with the bolts 27, it is not necessary to strongly press the horn pad 10 against the steering wheel 1 against the repulsive force of the horn spring 50. The screwing operation of the bolt 27 is easy.

  The above embodiment is an example of the present invention, and the present invention may take forms other than those shown in the drawings. For example, in the above embodiment, the guide bush 30 is mounted in the mounting hole 24 and the claw portion 12a is engaged with the edge of the mounting hole 24 through the guide bush 30. However, the guide bush 30 is omitted, It is good also as a structure which the nail | claw part 12a engages with the edge of the attachment hole 24 directly.

It is sectional drawing of the steering wheel assembly which concerns on embodiment. It is a disassembled perspective view of the steering wheel assembly which concerns on embodiment. It is a disassembled sectional view of the steering wheel assembly concerning an embodiment. It is a reverse view of the steering wheel assembly which concerns on embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steering wheel 2 Hub part 3 Spoke part 4 Ring part 10 Horn pad 11 Base part 12 Attachment piece 12a Claw part 15 Contact 20 Horn plate 21 Main plate part 22 Support piece 23 Leg piece 24 Horn pad attachment hole 25 Contact 30 Guide bush 40 steps Attached bolt (retraction prevention body)
50 Horn Spring

Claims (1)

A horn pad is attached to the steering wheel so that it can advance and retract in the axial direction of the steering column.
A horn switch is provided in which the contact point contacts and separates as the horn pad moves forward and backward.
In the steering wheel assembly provided with a spring for biasing the horn pad in a direction for separating the contact,
A horn plate having a horn pad mounting hole is attached to the steering wheel,
The horn pad is provided with a plurality of attachment pieces inserted into the horn pad attachment hole so as to be capable of moving back and forth and elastically deformable in the radial direction of the horn pad attachment hole,
The mounting piece is provided with a claw portion engaged with an edge of the horn pad mounting hole,
A retraction prevention body for preventing deformation in the approaching direction between the attachment pieces is attached to the horn pad ,
The spring is a coil spring and is disposed around the mounting piece.
The retraction prevention body is a stepped bolt, which is screwed and fixed to the horn pad,
Each mounting piece is erected from the horn pad in a direction parallel to the axis of the steering column and toward the steering wheel,
A plurality of the mounting pieces are inserted into the common horn pad mounting hole,
The mounting pieces inserted into the common horn pad mounting hole are arranged at intervals in the circumferential direction of the horn pad mounting hole,
The mounting pieces inserted into the common horn pad mounting hole can be elastically deformed in the direction in which the front end side of each standing direction approaches and separates,
The claw portion protrudes from the front end side of each mounting piece in the standing direction in a direction away from the mounting pieces inserted into the common horn pad mounting hole, and the claw portion projects from the horn pad mounting hole. It engages with the edge on the steering wheel side,
The spring is arranged so as to surround the mounting pieces inserted into the common horn pad mounting hole,
Of the steering wheel side surface of the horn pad, a stepped bolt screwing hole is provided in a region surrounded by the mounting pieces inserted into the common horn pad mounting hole,
The stepped bolt has a cylindrical portion, and a screw rod portion having a diameter smaller than that of the cylindrical portion, which protrudes coaxially with the cylindrical portion from one end side in the axial direction of the cylindrical portion. ,
The threaded rod portion is screwed into the stepped bolt screwing hole, and the cylindrical portion is disposed between the mounting pieces inserted into the common horn pad mounting hole, thereby the common horn pad. Deformation of the mounting pieces inserted into the mounting holes in the approaching direction is always restricted by the cylindrical portion, and the claw portions of the mounting pieces are engaged with the edge of the horn pad mounting hole on the steering wheel side; And
The stepped bolts were screwed into the stepped bolt screwing holes through the mounting pieces inserted into the common horn pad mounting holes after each mounting piece was inserted into the horn pad mounting hole. Is,
The stepped bolt is non-projecting from the front end side of each mounting piece to the steering wheel side .

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