JPS6310358Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for automatically self-cancelling an activated turn signal in response to a steering operation of an automobile, etc. The purpose of the invention is to automatically self-cancel an activated turn signal in response to a steering operation of an automobile, etc. The object of the present invention is to provide a turn signal self-cancellation device that does not generate noise when the steering wheel is rotated to the right in a so-called non-cancellation state.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a horizontally long body attached to the upper end of a steering column (not shown), and a steering wheel 3 is fixed to the upper end of a steering shaft 2 passing through the center of the body. Reference numeral 4 designates an operating knob serving as a turn signal operating member provided at the right end of the body 1 so as to rotate about a shaft portion 4a, and the operating portion 4b of this knob is provided directly below the steering wheel 3. 5 is body 1
A moderation member having a moderation recess 5a provided in the moderation member,
A ball 6 disposed in a horizontal hole 4c of the operation knob 4 is engaged with the moderation recess 5a by the elastic force of a spring 7. 8 is a turn signal switch, which is directly operated by the operation knob 4. 9 is a cylindrical cancell cam provided in the center of the body 1 so as to rotate together with the steering wheel 3;
For example, two cam ridges 9a are provided on the outer circumference, and the steering shaft 2 passes through the inside of these cam ridges 9a. On the other hand, reference numeral 10 denotes a guide member attached to the lower surface of the body 1, which has a generally U-shaped cross section with an open upper surface.
Ratchet 12 via shaft 11 at the end adjacent to
is rotatably supported. Reference numeral 13 denotes a spring for returning the ratchet 12 to the neutral position.A coil portion 13a at the center of this spring is arranged around the shaft 11, and both end portions 13b, 13b are provided with a protruding strip portion 10a protruding from the upper surface of the guide member 10. Furthermore, the rising portions 13c, 13c at both ends are engaged with both side edges of the ratchet 12. and,
The ratchet 12 is provided with a protrusion 14 projecting from a position approximately midway between the rising portions 13c, 13c and oriented in the direction of the cancel cam 9. The tip of the protrusion 14 is located above the cam ridge 9a when the ratchet 12 is in a neutral state. located within the rotational trajectory. Reference numeral 15 denotes two movable bodies supported on the upper surface of the guide member 10 so as to be able to move in a straight line. A compression coil spring 18 is arranged in the first movable body 16 and the second movable body 17, respectively.
The extension portions 19 and 20 having a diameter of 0a are integrally extended, and both claw portions 19a and 20a are connected to the compression coil spring 18.
are engaged with each other against the elastic force of
An engagement surface 2 having a predetermined angle with respect to the moving direction is provided at the end of the first moving body 16, which is the tip of the moving body 15.
1 is provided, and a pin 22 is provided protruding from the end of the second movable body 17, which is the proximal end of the movable body 15. Reference numeral 23 denotes a collar member that is fitted and fixed to the shaft portion 4a of the operating knob 4, and pins 22 are inserted into engagement grooves 24 formed on the lower surface of the collar member. On the other hand, arc-shaped cam surfaces 25, 25 formed in an arc shape centered on the shaft 11 are provided on the outer circumferential portion of the ratchet 12, and between these cam surfaces 25, 25, a tangential direction from the cam surfaces 25, 25 is provided. Two extended linear cancel cam surfaces 26, 26 are provided with a predetermined angle α between them. These cancel cam surfaces 26, 26 are parallel to the engaging surfaces 21, 21 provided on the two movable bodies 15, respectively, when the ratchet 12 is in the neutral state.

Incidentally, reference numerals 27 and 28 are a light switch and a headlamp washer switch provided at the right end of the body 1, and these are switched by rotating vertically with respect to the body 1. 29 is a push button type daymap switching switch. Also, 30 and 3
1 is a wiper switch and a rear wiper switch provided on the left end of body 1, and these are also attached to body 1.
The switching operation is performed by vertically rotating the switch.
32 is a push button type watch switch.

Next, the operation of this embodiment configured as above will be explained. When the operation knob 4 is in the neutral state, the engaging surfaces 21, 21 of the two movable bodies 15, 15 are opposed to each other with a constant distance from the cam surfaces 26, 26, as shown in FIG. , the turn signal switch 8 is in a neutral state. In this state, for example, when the cancel cam 9 is rotated in the direction of arrow L in response to the rotation operation of the steering wheel 3,
The protrusion 14 engages with the cam ridge 9a, and the ratchet 12 is rotated in the direction of the arrow R against the spring 13. When the protrusion 14 comes off the cam ridge 9a, the spring 13 causes the ratchet 12 to move in the direction of the arrow L. It is rotated back. When the ratchet 12 returns to the neutral position, the spring 13 loses its return rotation force, and when the ratchet 12 attempts to move beyond the neutral position in the direction of arrow L, the spring 13 applies a braking force. It is rotated back to the neutral position without over-rotating. Similarly, when the turn signal switch 8 is in the neutral state and the cancel cam 9 is rotated, for example, in the direction of arrow R in response to a rotation operation of the steering wheel 3, the cam ridge 9a engages with the protrusion 14 and the spring 13 is rotated. Rachietsu 12 against
is rotated in the direction of arrow L, and the protrusion 14 is rotated to the cam ridge 9a.
When it comes off, the latch 12 is rotated in the direction of arrow R by the spring 13 and returned to the neutral position.

On the other hand, when the operating knob 4 is rotated from the neutral state in the direction of arrow L as shown in FIG.
2 and the engagement groove 24 is changed, the movable body 15 located above is moved in the direction of arrow A, that is, the direction of the ratchet 12, and the movable body 15 located below is moved in the direction of arrow B, that is, the ratchet 12. is moved in the opposite direction. And Ratchet 12
When is in a neutral state, the engaging surface 21 of the movable body 15 located above comes into contact with the cancel cam surface 26 in a parallel state. In this state, when the cancel cam 9 is rotated in the direction of arrow L, that is, in the non-cancel direction in response to the rotation operation of the steering wheel 3, the cam ridge 9a engages with the protrusion 14 and resists the spring 13, as described above. When the ratchet 12 is rotated in the direction of the arrow R from the neutral position (see the two-dot chain line in Figure 3) and the protrusion 14 comes off the cam ridge 9a, the spring 13 causes the ratchet 12 to return to the neutral position and rotate. However, the ratchet 12 moves from the neutral position to the arrow R.
When rotating back and forth in the direction, the arcuate cam surface 25 of the ratchet 12 comes into sliding contact with the engagement surface 21, and the engagement surface 21 is not displaced in either direction of arrow A or B, in other words, the cancel operation is performed. Not done. Furthermore, when the latch 12 rotates back and forth in this way, the latch 12 and the engagement surface 21 are in a sliding state, and the rotational force acting on the latch 12 due to the spring 13 becomes zero at the neutral position and tends to exceed the neutral position. Since the rotation of the ratchet 12 is braked by the spring 13, no noise is generated as the ratchet 12 rotates back and forth. When the cancel cam 9 is rotated in the direction of arrow R, that is, in the cancel direction, in response to the rotation of the steering wheel 3, the cam ridge 9a engages with the protrusion 14, and the ratchet 12 moves against the spring 13. It is rotated in the direction L, and in accordance with the rotation, the cancel cam surface 26 is inclined with respect to the engagement surface 21, and the first moving body 16 is moved in the direction of arrow B (see FIG. 4). Thus, the elastic load acting on the compression coil spring 18 due to the movement of the first moving body 16 is applied to the ball 6.
When the elastic engagement force between the ball 6 and the recess 5a of the moderation member 5 is exceeded, the engagement between the ball 6 and the recess 5a is disengaged, and the second movable body 17 also moves in the direction of arrow B. Since the operation knob 4 is returned to the neutral state shown in FIG. 1 by returning in the direction of arrow R, the turn signal switch 8 also automatically returns to the neutral state, and a self-cancelling operation is performed, and the left turn signal The blinking operation of the lamp is stopped. By the way, the cancel cam 9 is pointing to arrow R.
When the operation knob 4 is rotated in the direction of arrow L by the user when it is rotated in the cancel direction, the compression coil is moved while the movement of the second movable body 17 is restricted. The spring 18 contracts, and only the first movable body 16 moves back and forth, so that the ratchet 1
This allows rotation of the steering wheel 2, thereby preventing rotation of the steering wheel 2 from being inhibited. Furthermore, when the operating knob 4 is rotated in the direction of arrow R from the neutral state, the turn signal switch 8 is activated and the right turn flasher lamp blinks, but in this case, the lower moving object 15
is moved in the direction of the ratchet 12, and when the cancel cam 9 is rotated in the direction of arrow R, the ratchet 12 is rotated in the direction of arrow L to maintain the non-cancel state, and the cancel cam 9 is rotated in the direction of arrow L. At this time, the ratchet 12 is rotated in the direction of arrow R to perform a self-cancelling operation.

As is clear from the above description, the present invention can provide a turn signal self-cancellation device that does not generate noise when not cancelled.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a partially cutaway front view, Fig. 2 is a bottom view of the same, and Figs. 3 and 4 are main views for explaining the operation. FIG. In the drawing, 2 is a steering shaft, 4 is an operation knob (operation member), 9 is a cancel cam, 12 is a ratchet, 13 is a spring, 15 is a moving body, 18 is a compression coil spring, 21 is an engagement surface, and 25 is an arc shape. The cam surface 26 is a cancel cam surface.

Claims (1)

[Scope of utility model registration request] A cancel cam rotates integrally with the steering shaft, and is provided in the vicinity of the cancel cam so as to be able to reciprocate left and right, and is always held in a neutral state by a return spring, and the cam crest of the cancel cam rotates in the neutral state. A ratchet is positioned within the locus and rotates to the left or right according to the rotation of the cancel cam, and the other has an engaging surface at its tip, and one of the ratchets is linearly moved according to the operating direction of the operating member. two movable bodies having a spring mechanism that allows the engaging surfaces to move in a direction opposite to the ratchet when the engaging surfaces are close to or in contact with the ratchet and a load of a certain value or more is applied to the engaging surfaces; The ratchet is provided in an arc shape centered on its rotation center, and the ratchet is rotated in the non-cancelling direction with one of the engaging surfaces of the two movable bodies being close to or in contact with the ratchet. an arcuate cam surface that faces the engagement surface and prevents a moving force from acting on the movable body when the movable body is moved; and a linear cam surface that extends in a tangential direction from the arcuate cam surface on the ratchet. When the ratchet is in a neutral state, the ratchet is approximately parallel to the engagement surface, and the ratchet is rotated in the cancel direction with one of the engagement surfaces of the two movable bodies being close to or in contact with the ratchet. A turn signal self-cancelling device comprising: a canceling cam surface that sometimes moves one of the moving bodies in a direction away from the ratchet.