JPH09161610A - Turn cancel mechanism of vehicle direction indicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce as much as possible an impact sound generated by the end part of a cancellation latchet piece hitting a support seat when a steering wheel is rotated in the making direction of a turn signal lever. SOLUTION: In this turn cancel mechanism 30, a cancellation cam 49 is engaged with a cancellation latchet 48 only when a steering wheel is rotated in the reverse direction to the left and right direction indicating position of a movable bracket 34 held by a moderation mechanism 36, and the cancellation latchet piece 35 and the movable bracket 34 are integrally rotated to return the bracket 34 to the neutral position. In that case, a guide pin 46 is provided upright in the vicinity of the support seat 45 of the movable bracket 34, and the guide pin 46 is brought into sliding contact with the guide groove 47 of the cancellation latchet piece 35, thereby regulating the swing of the cancellation latchet piece 35.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turn cancel mechanism for a vehicle directional support.

[0002]

2. Description of the Related Art A conventional turn cancel mechanism 10 is shown in FIG.
As shown in FIG. 5, the movable bracket 13 is attached to the body 12 of the direction indicator through which the steering shaft penetrates by the pivot 15 so as to rotate from the neutral position to the left and right direction indicating positions in conjunction with the turning operation of the turn signal lever 14. The tubular projection 19 provided on the movable bracket 12 is assembled to the body 12, and the left and right ends of the cancel ratchet piece 18 are swingably supported by the support seats 17 provided at the ends of the arms 16 of the movable bracket 13. Moderation ball 20 and moderation spring 21
To form a moderation mechanism, the moderation spring 21 presses the moderation ball 20 against the moderation valley 12a fixed to the body 12 to hold the movable bracket 13 at the neutral position or the left and right direction indicating positions, and the cancel ratchet piece. 18
The left and right end portions of the steering wheel are pressed against the support seat 17, the cancel cam cylinder 23 having the cancel cam 22 on the outer peripheral portion is loosely fitted to the steering shaft 11, and the upper end portion is rotated so as to rotate in association with the rotation operation of the steering wheel. Protrusion 2 provided on
It is connected to the steering wheel via 4. According to the turn cancel mechanism 10 having such a configuration, when the movable bracket 13 is held at the right direction indicating position by the moderation mechanism as shown in FIG. Also rotates in the right direction, the cancel ratchet piece 18 swings by the cancel cam 22, and the left end is separated from the support seat 17 of the left arm 16, but the movable bracket 13 is continuously moved to the right direction indicating position by the moderation mechanism. Retained. On the other hand, when the steering wheel is rotated counterclockwise, the cancel cam 22 causes the cancel ratchet piece 1 to move.
The cancel ratchet piece 18 formed in FIG. 8 is engaged with the cancel ratchet piece 18 and the movable bracket 13 to rotate integrally to the left, whereby the movable bracket 13 returns to the neutral position.

[0003]

In the conventional turn cancel mechanism 10 described above, the cancel cam 22 cancels when the steering wheel is rotated in the same direction as the left and right direction indicating positions of the movable bracket 13 held by the moderation mechanism. The ratchet piece 18 rotates while slidingly contacting it, and at that time, the left and right ends of the cancel ratchet piece 18 separate from the support seat 17. Then, when the cancel cam 22 further rotates in the same direction and passes through the cancel ratchet 25, the separated ends of the cancel ratchet piece 18 hit the supporting seat 17 by the force of the moderation spring 21, so that an impact sound is generated. Occur. In view of the above point, the present invention has an object to provide a turn canceling mechanism capable of reducing as much as possible an impact sound generated when the end portion of the cancel ratchet piece 18 hits the support seat 17.

[0004]

The invention according to claim 1 is
A movable body mounted on the body so that it can rotate from the neutral position to the left and right direction indicating positions by interlocking with the turning operation of the turn signal lever, which has a body of a direction indicator through which the steering shaft penetrates and a pair of left and right arms. A bracket, a cancel ratchet piece having a pair of left and right cancel ratchets, the left and right ends of which are swingably supported by support seats provided at the ends of the arms, and a moderation ball and a moderation spring. In order to hold the movable bracket in the neutral position or in the left and right direction positions by pressing the moderation ball to the moderation valley provided in the body, and to press the left and right ends of the cancel ratchet piece against the support seat. And has a cancel cam on the outer periphery and is loosely fitted on the steering shaft to rotate in conjunction with the rotating operation of the steering wheel. And a cancel cam barrel for,
The cancel cam engages with the cancel ratchet only when the steering wheel is rotated in the direction opposite to the left and right direction indicating positions of the movable bracket held by the moderation mechanism, and the cancel ratchet piece and the movable bracket rotate integrally. In the turn cancel mechanism of the vehicle turn indicator for returning the bracket to the neutral position, a guide pin is erected in the vicinity of the support seat of the movable bracket, and when the cancel ratchet piece swings left and right. ,
The guide pin is slidably contacted to form a guide groove for restricting the swing of the cancel ratchet piece.

[0005]

According to the invention of claim 1, since the swing of the cancel ratchet piece is restricted by the guide pin and the guide groove, the end portion of the cancel ratchet piece hits the support seat by the force of the moderation spring. The impact at the time of doing can be eased and the impact noise can be reduced as much as possible.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the drawings. FIG. 1 shows a turn cancel mechanism 30 for a vehicular turning indicator according to an embodiment of the present invention. The turn cancellation mechanism 30 is the steering shaft 3
Body 32 through which 1 penetrates, and steering shaft 31
The cancel cam cylinder 33 loosely fitted in the movable bracket 3
4, a cancel ratchet piece 35, and a detent mechanism 36. The movable bracket 34 is the cancel cam cylinder 3
3 has a pair of left and right arms 37 protruding so as to surround 3,
Both arms 37 are connected by a mountain-shaped connecting piece 38.
The turn signal lever 3 is provided at the base end of the movable bracket 34.
9, a cylindrical shaft 40 is integrally provided on the lower surface of the base end portion for fitting in a fitting hole formed in the body 32 to support the movable bracket 34 on the body 32 so as to be rotatable left and right. Has been done. A tubular projection 41 is integrally provided on the top of the chevron-shaped connecting piece 38 of the movable bracket 34, and a moderation ball 42 and a moderation spring 43 that constitute the moderation mechanism 36 are loaded therein. As shown in FIG. 2, the rear end surface of the tubular tubular portion 41 is formed as an opening, and the moderation spring 43 is attached to the cancel ratchet piece 35. The movable bracket 34 is held at the neutral position shown in FIG. 1 or the left-right direction indicating position by pressing the moderation ball 42 with one of the three moderation valleys 44 fixed to the body 32 by the moderation spring 43.

A support seat 45 is formed at the tip of both arms 37 of the movable bracket 34, and the left and right ends of the cancel ratchet piece 35 are supported by the force of the moderation springs 43.
It is in pressure contact with 5 so that it can swing left and right. Movable bracket 3
A guide pin 46 is provided in the vicinity of the support seat 45 of the connecting piece 38 of No. 4 in a protruding manner. On the other hand, guide grooves 47 are formed at the left and right ends of the cancel ratchet piece 35 so that the guide pin 46 slides in contact with the ratchet piece 35 when the ratchet piece 35 swings left and right. As shown in the enlarged view of FIG. 4, the guide groove 47 has a tapered surface 47a that expands toward the left and right end portions of the cancel ratchet. A pair of left and right cancel ratchets 48 is formed on the cancel ratchet 35 piece, and a cancel cam that engages with the cancel ratchet 48 on the outer peripheral portion of the cancel cam cylinder 33 to integrally rotate the cancel ratchet piece 35 and the movable bracket 34. 49 is projected. In addition, a fitting protrusion 50 that fits into a fitting hole provided in a member integrated with the steering wheel is provided on the upper end portion of the cancel cam cylinder 33 in order to rotate the cylinder 33 in conjunction with the rotation operation of the steering wheel. ing.

Turn cancel mechanism 3 according to the present embodiment
The configuration of 0 is as described above.
A description will be given based on FIG. FIG. 4 shows a state in which the movable bracket 34 is rotated to the right direction indicating position by the operation of the turn signal lever 39 and is held by the moderation mechanism 36. When the steering wheel is rotated rightward in this state, the cancel cam 49 rotates clockwise while slidingly contacting the cancel ratchet 48 on the left side.
It swings against the force of 3 and the left end moves away from the support seat 45. When farthest away, the guide pin 46 is located at the bottom of the guide groove 47 as shown by the solid line in FIG. When the steering wheel is rotated further to the right, as shown in Fig. 5,
Since the cancel cam 49 is disengaged from the left cancel ratchet 48, the cancel ratchet piece 35 returns to the original position where the left end of the cancel ratchet piece 35 comes into contact with the support seat 45 by the force of the moderation spring 43. At this time, the guide pin 46 moves while slidingly contacting the tapered surface 47a of the guide groove 47 as shown in FIG. 4, so that the swinging of the cancel ratchet piece 35 at the time of return is restricted. This cancels ratchet piece 3
Since the left end face of 5 returns to the original position while slidingly contacting the rounded portion 45a of the support seat 45, the cancel ratchet piece 3
The impact when the end of 5 hits the support seat 45 is mitigated, and the impact noise is significantly reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing a turn cancel mechanism of a vehicular turning indicator according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view taken along line 2-2 of FIG.

FIG. 3 is an operation explanatory view of a guide pin and a guide groove of the turn cancel mechanism.

FIG. 4 is an operation explanatory view of the turn cancel mechanism.

FIG. 5 is an operation explanatory view of the turn cancel mechanism.

FIG. 6 is a plan view showing a conventional turn canceling mechanism of a vehicular turning indicator.

[Explanation of symbols]

30 ... Vehicle turn indicator turn cancel mechanism, 31
... Steering shaft, 32 ... Body, 33 ... Cancel cam barrel, 34 ... Movable bracket, 35 ... Cancel ratchet piece, 36 ... Moderation mechanism, 37 ... Arm, 39 ...
Turn signal lever, 42 ... Moderation ball, 43 ... Moderation spring, 44 ... Moderation valley, 45 ... Support seat, 46 ... Guide pin, 47 ... Guide groove, 48 ... Cancel ratchet, 49 ... Cancel cam.

Claims (1)

[Claims] 1. A body of a turn indicator through which a steering shaft penetrates, and a body which has a pair of left and right arms so as to rotate from a neutral position to a left and right direction indicating positions in association with a turning operation of a turn signal lever. The movable bracket attached to the above, a cancel ratchet piece that has a pair of left and right cancel ratchets, and the left and right end portions of the cancel ratchets are swingably supported by support seats provided at the tips of both arms. With the moderation spring, the moderation ball is pressed against the moderation valley provided on the body to hold the movable bracket at the neutral position or the left and right direction positions, and the left and right ends of the cancel ratchet piece are supported by the support seat. Rotating operation of the steering wheel, which has a moderation mechanism that presses against the A cancel cam cylinder that rotates in conjunction with the cancel cam, and the cancel cam engages with the cancel ratchet only when the steering wheel is rotated in the direction opposite to the left and right direction indicating positions of the movable bracket held by the moderation mechanism, In a turn canceling mechanism of a vehicle turn indicator for integrally rotating a cancel ratchet piece and a movable bracket to return the bracket to a neutral position, a guide pin is erected in the vicinity of a support seat of the movable bracket to cancel the cancel. A turn canceling mechanism for a vehicle directional support, wherein guide rails are formed in sliding contact with the left and right ends of the ratchet piece to restrict the swing of the cancel ratchet piece. .