JPH09309443A - Cancel structure of turn signal switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a compression coil spring, and to prevent the generation of an easy slippage of the cancel position. SOLUTION: Connecting holes 16 and 18 are formed to a steering boss 12A, and connecting pins 22 and 24 formed to a cancel cam are being inserted to the connecting holes 16 and 18 respectively. A guide member 26 is erected to the cancel cam 20 along the vertical wall 12F of a steering wheel 12. The surface of the guide member 26 opposing to the vertical wall 12F is made as a guide surface 26A, and the guide surface 26A is to be positioned by the vertical wall 12F of the steering wheel 12 when the connecting pins 22 and 24 are inserted to the connecting holes 16 and 18. And a cancel projection 34 is formed on the outer periphery of the tube body 28 of the cancel cam 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turn signal switch for switching a vehicle turn signal lamp, and more particularly to a turn signal switch canceling structure for returning the turn signal switch to a neutral position.

[0002]

2. Description of the Related Art Conventionally, a steering wheel of an automobile is equipped with a turn signal switch for switching and operating a vehicular turning indicator light.
The structure shown in No. 446 is known.

As shown in FIG. 5, in this turn signal switch canceling structure, an engaging groove 76 is formed in a cylinder 74A of a cancel cam 74 into which a steering shaft 72 interlocking with a steering wheel 70 is inserted. The engaging projection 78 of the steering shaft 72 is engaged with the engaging groove 76. Further, the engagement projection 78 is attached to the cylinder 74A of the cancel cam 74.
By providing the elastic arm 80 for sandwiching, the connecting force of the connecting pin is stabilized, the cancel cam is conventionally biased toward the steering wheel, the connecting hole formed in the steering wheel, and the connecting pin formed in the cancel cam. The compression coil spring used to stabilize the connecting force of is eliminated.

[0004]

However, in the cancel structure of the turn signal switch, the engagement protrusion 78 of the steering shaft 72 is fixed at a constant position even when the steering wheel is in a straight traveling state due to variations in each component. Therefore, the cancel protrusion 82 formed on the cancel cam 74 and the ratchet 86 of the turn signal switch formed on the housing 84 side are displaced in the steering rotation direction, and the cancel position is likely to be displaced.

In view of the above facts, it is an object of the present invention to obtain a cancel structure for a turn signal switch in which the compression coil spring can be eliminated and the cancel position is less likely to shift.

[0006]

According to a first aspect of the present invention, when the steering wheel connected to the steering shaft is rotated in response to the operation, the cancel projection is brought into contact with the ratchet of the turn signal switch to switch between the left and right. A cancel structure of a turn signal switch for returning from a position to a neutral position, wherein a connecting portion formed on a boss portion of the steering wheel, an inserting portion into which the steering shaft is inserted, and a connected portion connected to the connecting portion A guide part, which is positioned by the steering wheel when the connected part is connected to the connecting part and guides the connected part to the connecting part; and a cancel member having the cancel protrusion. Is characterized by.

Therefore, when the steering wheel is attached to the steering shaft in which the cancel cam is inserted in the insertion portion, the cancel cam is positioned with respect to the steering wheel by the guide portion, and the connected portion of the cancel cam is steered. Guided by the connecting portion provided on the boss of the wheel, the connected portion of the cancel cam is reliably inserted into the connecting portion of the steering wheel.

According to the second aspect of the present invention, when the cancel projection contacts the ratchet of the turn signal switch when the steering wheel connected to the steering shaft is rotated, the cancel projection contacts the ratchet of the turn signal switch. A canceling structure of a turn signal switch for returning to a steering wheel, the connecting hole being formed in a boss portion of the steering wheel, a tubular body portion into which the steering shaft is inserted, and a connecting hole portion being inserted into the steering wheel. A canceling cam having a cancel projection, the guide pin being positioned by a steering wheel when inserting the connecting pin into the connecting hole, and guiding the connecting pin into the connecting hole. Is characterized by.

Therefore, when the steering wheel is attached to the steering shaft in which the cancel cam is inserted in the tubular portion, the cancel cam is positioned with respect to the steering wheel by the guide portion, and the cancel cam connecting pin is steered. Since the guide pin is guided by the connecting hole provided in the boss of the wheel, the connecting pin of the cancel cam is reliably inserted into the connecting hole of the steering wheel.

Further, according to the present invention as set forth in claim 3, when the cancel projection contacts the ratchet of the turn signal switch when the steering wheel connected to the steering shaft rotates in accordance with the operation, the cancel position contacts the neutral position. A structure for canceling a turn signal switch for returning to a steering wheel, comprising: a connecting hole portion formed in a boss portion of the steering wheel; a cylindrical portion into which the steering shaft is inserted; and a connecting hole portion of the steering wheel. A turn signal including a connecting pin, a guide portion that is positioned by a steering wheel when the connecting pin is inserted into the connecting hole, and guides the connecting pin to the connecting hole, and a rotor having the cancel protrusion. And a switch.

Therefore, the turn signal switch is provided with a cylindrical portion into which the steering shaft is inserted, a connecting pin inserted into the connecting hole portion of the steering wheel, a guide portion for guiding the connecting pin into the connecting hole portion, and a canceling protrusion. Therefore, it is not necessary to provide a cancel cam as a separate body.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a cancel structure for a turn signal switch according to the present invention will be described with reference to FIGS.

As shown in FIG. 1, the steering wheel 12 is provided at the upper end 10A of the steering shaft 10.
Are splined together, steering wheel 1
The lock nut 2 is fixed to the steering shaft 10 by a lock nut 14.

As shown in FIG. 2, at the center of the steering wheel 12, a cylindrical steering boss 12A is provided.
From the outer periphery of the steering boss 12A, the steering spokes 12B, 12C, 12D,
12E is protruding. Steering spoke 12B,
12C is linearly extended in the left-right direction, and the front surface (the upper surface in FIG. 2) of the connecting portion between the steering spokes 12B and the steering spokes 12C is a straight vertical wall portion 12F extending in the left-right direction. ing.

As shown in FIG. 1, the steering boss 1
Connection holes 16 and 18 as connection portions are formed on the lower surface of 2A (the surface on the lower side in FIG. 1).

As shown in FIG. 2, the connecting hole portion 16 is formed on the front surface of the steering boss 12A, and has a U-shaped plan cross-section with the outer peripheral side of the steering boss 12A being open. A pair of connecting holes 18 is formed at a position rotated from the connecting hole 16 by a predetermined angle θ (θ <180 °) in the left-right direction, and has a flat cross-sectional shape U that is open on the outer peripheral side of the steering boss 12A. It is shaped like a letter. In these connection hole portions 16 and 18, connection pins 22 and 2 as connection target portions formed in the cancel cam 20 are formed.
4 are inserted respectively.

The relationship between the height of the connecting pins 22 and 24 and the depth of the connecting holes 16 and 18 is as follows.
The length is set in consideration of the variation in the axial direction of 2A, so that the connecting pins 22 and 24 completely enter the connecting holes 16 and 18 and are reliably engaged.

As shown in FIG. 1, the connecting pins 22, 24 are
Is a connecting hole portion 16 of the upper surface 20A of the cancel cam 20,
It is erected at a position opposed to 18. Further, the steering wheel 1 is provided on the upper surface 20A of the cancel cam 20.
The guide portion 26 is provided upright along the vertical wall portion 12F.

As shown in FIG. 2, the guide portion 26 has a rectangular shape extending in the left-right direction in a plan view, and a surface facing the vertical wall portion 12F of the steering wheel 12 is a guide surface 26A. Therefore, when the connecting pins 22 and 24 are inserted into the connecting holes 16 and 18, the guide surface 26A of the guide portion 26 has the guide surface 26A of the vertical wall portion 1 of the steering wheel 12.
It is positioned by 2F. Also,
The steering wheel 12 cannot be assembled unless the positions of the guide surface 26A of the guide portion 26 and the vertical wall portion 12F of the steering wheel 12 are determined.

As shown in FIG. 1, the cancel cam 20 is provided.
A tubular body portion 28 is formed in the center of the lower surface 20B of the steering shaft 10.
Are inserted with the cylindrical portion 32 of the turn signal switch 30 interposed therebetween. The turn signal switch 30 is fixed to the vehicle body side.
On the other hand, the steering shaft 10, the steering wheel 12, and the cancel cam 20 rotate integrally.

As shown in FIG. 3, the cancel cam 20 is provided.
A cancel projection 34 is formed on the outer peripheral portion of the cylindrical body portion 28. The turn signal switch 30 has a well-known structure. When the operation lever 42 is oscillated in the right direction R and the left direction L, the operating plate 44 oscillates and is urged by the leaf spring 46. The reference numeral 48 projects toward the tubular body portion 28 side of the cancel cam 20. When the ratchet 48 projects toward the cancel cam 20, the ratchet 48 moves within the rotation locus of the cancel projection 34 of the cancel cam 20 and interferes with the cancel projection 34.

Next, the operation of the present embodiment will be described. In the present embodiment, the steering shaft 10 is inserted into the tubular body portion 28 of the cancel cam 20 with the tubular body portion 32 of the turn signal switch 30 sandwiched therebetween. By positioning the guide surface 26A of the guide portion 26 by the vertical wall portion 12F of the steering wheel 12, the cancel cam 20 is positioned with respect to the steering wheel 12.

Therefore, the connecting pins 22 and 24 of the cancel cam 20 are connected to the boss portion 12 of the steering wheel 12.
Since the connection holes 16 and 18 provided in A are guided, the connection pins 22 and 24 are reliably inserted into the connection holes 16 and 18.

Therefore, conventionally, the cancel cam is urged toward the steering wheel to stabilize the connecting force between the connecting hole formed in the steering wheel and the connecting pin formed in the cancel cam, and at the time of assembling, the connecting hole is formed. When the position with respect to the connecting pin is displaced, the cancel cam is released in the direction along the steering shaft, and the compression coil spring used to prevent damage to the cancel cam can be eliminated. Further, by eliminating the compression coil spring, sliding noise between the terminal edge of the compression coil spring and the switch body does not occur, and sliding resistance between the terminal edge of the compression coil spring and the switch body does not occur, The rotation torque of the steering wheel can be reduced.

Further, in this embodiment, since the contact between the cancel projection 34 and the ratchet 48 can be adjusted by the mounting position of the steering wheel 12, the variation of each component can be absorbed by the mounting position of the steering wheel 12. It is possible, and the cancellation position is unlikely to shift.

In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to such an embodiment, and various other embodiments are within the scope of the present invention. It is clear to a person skilled in the art that is possible. For example, in the present embodiment, the steering boss 12
Connecting holes 16 and 18 as connecting portions are formed in A, and connecting pins 22 and 24 as connected portions are formed in the cancel cam 20.
However, the connecting portion and the connected portion are connected hole portions 16,
18 and the connecting pins 22 and 24, for example, the connecting pins 22 and 24 are formed on the steering boss 12A,
The cancel cam 20 may be provided with the connection holes 16 and 18.

Further, as shown in FIG. 4, in the structure in which the rotor 50 such as a spiral cable is arranged above the turn signal switch 30, the rotor 50 serves as a cancel cam, and the steering wheel 1 is provided on the upper surface 50A.
A lock pin as a guide portion 52, a connector housing, etc. are provided upright along the vertical wall portion 12F of the second vertical wall portion 12F, and a canceling protrusion 56 is provided on the outer peripheral portion of the cylindrical body portion 54 formed in the central portion of the lower surface 50B of the rotor 50. You may form.

In this case, since it is not necessary to provide the cancel cam as a separate body, the number of parts can be reduced and the cost can be reduced accordingly. Further, as compared with the case where the rotor is provided separately on the outer peripheral portion of the cancel cam, the inner diameter of the rotor can be made smaller, so that the spiral cable length for obtaining the same number of rotations can be shortened, and also in this respect, the cost can be reduced. is there.

[0029]

According to the first aspect of the present invention, the cancel projection abuts the ratchet of the turn signal switch when the steering wheel connected to the steering shaft rotates according to the operation of the steering wheel. A structure for canceling a turn signal switch for returning to a vehicle, comprising a connecting portion formed on a boss portion of a steering wheel, a connected portion for connecting the insertion portion for inserting the steering shaft and the connecting portion, and a connected portion for the connecting portion. Since a canceling member having a cancel projection and a guide portion that guides the connected portion to the connecting portion when positioned by the steering wheel when connecting the two, the compression coil spring can be eliminated, and the cancel position shifts. It has an excellent effect that is hard to occur.

According to the second aspect of the present invention, when the cancel projection contacts the ratchet of the turn signal switch when the steering wheel connected to the steering shaft is rotated, the cancel projection contacts the ratchet of the turn signal switch. A structure for canceling a turn signal switch for returning to a connection, comprising a connecting hole formed in a boss portion of a steering wheel, a cylindrical portion into which a steering shaft is inserted, and a connecting pin inserted into a connecting hole portion of a steering wheel. Since the configuration is provided with the guide portion that is positioned by the steering wheel when inserting the connecting pin into the hole portion and guides the connecting pin into the connecting hole portion, and the cancel cam having the cancel protrusion, the compression coil spring can be eliminated, And it is excellent that the cancellation position is unlikely to shift. It has an effect.

According to the third aspect of the present invention, when the cancel projection contacts the ratchet of the turn signal switch when the steering wheel connected to the steering shaft is rotated, the cancel projection contacts the ratchet of the turn signal switch. A canceling structure of a turn signal switch for returning to a connection, which is connected with a connecting hole formed in a boss portion of a steering wheel, a tubular body portion into which a steering shaft is inserted, and a connecting pin inserted into a connecting hole portion of a steering wheel. Since the turn signal switch is provided with a guide portion that is positioned by the steering wheel when the connecting pin is inserted into the hole and guides the connecting pin to the connecting hole, and a turn signal switch provided with a rotor having a canceling protrusion, The compression coil spring can be eliminated and the cancellation position Shift has an excellent effect that hardly occurs. Further, it has an excellent effect that the number of parts can be reduced and the cost can be reduced accordingly.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a cancel structure of a turn signal switch according to an embodiment of the present invention.

FIG. 2 is a plan view showing a cancel structure of a turn signal switch according to an exemplary embodiment of the present invention.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is a side sectional view showing a cancel structure of a turn signal switch according to another embodiment of the present invention.

FIG. 5 is a side sectional view showing a cancel structure of a turn signal switch according to a conventional embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Steering shaft 12 Steering wheel 12A Steering boss 12F Vertical wall part of steering wheel 16 Connection hole part (connection part) 18 Connection hole part (connection part) 20 Cancel cam 22 Connection pin (connection part) 24 Connection pin (connection part) ) 26 guide part 28 tubular part 30 turn signal switch 34 canceling protrusion 50 rotor (cancel cam) such as spiral cable 52 guide part 54 tubular part 56 canceling protrusion

Claims (3)

[Claims] 1. A cancel structure for a turn signal switch, in which the cancel projection is brought into contact with a ratchet of the turn signal switch when the steering wheel connected to the steering shaft is rotated to restore the neutral position from the left / right switching position. A connecting portion formed on a boss portion of the steering wheel, an insertion portion into which the steering shaft is inserted, a connected portion connected to the connecting portion, and the connected portion connected to the connecting portion. A cancel structure for a turn signal switch, comprising: a guide portion that is positioned by the steering wheel to guide the connected portion to the connecting portion, and a cancel member having the cancel protrusion. 2. A turn signal switch canceling structure for returning from a left / right switching position to a neutral position by contacting a cancel projection with a ratchet of the turn signal switch when the steering wheel connected to a steering shaft rotates in response to an operation. The connecting hole formed in the boss portion of the steering wheel, the tubular portion into which the steering shaft is inserted, the connecting pin inserted into the connecting hole portion of the steering wheel, and the connecting hole portion Cancellation of a turn signal switch, comprising: a guide portion that is positioned by a steering wheel when the connecting pin is inserted and guides the connecting pin into the connecting hole; and a cancel cam having the cancel protrusion. Construction. 3. A cancel structure for a turn signal switch, in which the cancel projection is brought into contact with a ratchet of the turn signal switch when the steering wheel connected to the steering shaft is rotated to restore the neutral position from the left / right switching position. The connecting hole formed in the boss portion of the steering wheel, the tubular portion into which the steering shaft is inserted, the connecting pin inserted into the connecting hole portion of the steering wheel, and the connecting hole portion A guide portion that is positioned by a steering wheel when the connecting pin is inserted and guides the connecting pin to the connecting hole; and a turn signal switch provided with a rotor having the cancel protrusion. The cancellation structure for the turn signal switch.