JPH0229540B2 - HOKOSHIJIKINOSERUFUKYANSERUSOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a self-cancellation device for a direction indicator of a vehicle or the like.

(Prior Art) FIG. 3 is a partial plan view of a conventional example of a self-cancelling device for a direction indicator. In this figure, the operating lever is rotated counterclockwise to engage the engagement ball 1 with the recess 2 on the left side. In other words, the turn signal is displayed to indicate a left turn. In this state, when the steering wheel is rotated to the left, the cancel cam 3 moves as shown by the arrow 4.
Rotate to the left. When the cancel cam 3 hits the cancel latch 5, the latch structure 6
resists the compression spring 7 and rotates about point A as a fulcrum. When the cancel cam 3 has passed, the ratchet structure 6 is forcefully returned by the action of the compression spring 7, and the ratchet 5 is moved back.
collides with the stopper 8. At this time, an abnormal noise is generated, causing discomfort to the driver of the vehicle. By the way, depending on the rotational position of the steering wheel, the ratchet structure 6 may be moved by operating the operating lever.
When moving, the cancell ratchet 5 of the ratchet structure 6 may come into contact with the cancell cam 3 and interfere with it. In order to operate the operating lever against such interference, the compression spring 7 must be compressed by the ratchet member 6. That is, when operating the operating lever in this case, the operating lever will not move unless a force for compressing the compression spring 7 is added to the normal operating force required in the case of no interference. Thus, depending on the rotational position of the steering wheel, there is a drawback that the operation of the operating lever becomes abnormally heavy.

Several methods have been proposed to reduce or eliminate the above-mentioned abnormal noise. For example, Akira Jitsukai
In No. 56-11141, a sliding slope is formed on the canceller latch to reduce collisions with the stopper. Furthermore, in Japanese Utility Model Application No. 57-113246, a portion of the canceller latch is formed into an elastically deformable tongue shape to prevent this portion from colliding with the stopper.

(Problems to be Solved by the Invention) The above-described conventional technology can certainly reduce or eliminate abnormal noise. However, the abnormally heavy operation of the operating lever when the cancel cam pushes up the ratchet structure has not been resolved. That is, in FIG. 3, when the cancell cam 3 hits the cancell latch 5, the latch member 6 rotates against the compression spring 7, using the point A on the other cancell latch as a fulcrum. Comparing the distance from this fulcrum A to point B, where the compression spring 7 acts on the ratchet structure 6, and the distance from this fulcrum A to point C, where the cancel cam 3 hits the canceller ratchet 5, we find that the latter is approximately twice as large as the former. Therefore,
Due to the lever principle, approximately half of the force of the compression spring 7 is required for the cancel cam 3 to push up the ratchet structure 6.

Therefore, an object of the present invention is to eliminate the heavy operation of the steering wheel caused by pushing up the ratchet structure with the ratchet cam when turning left or right, and to reduce abnormal noise. An object of the present invention is to provide a self-cancelling device for a direction indicator.

(Means for Solving the Problems) In order to achieve the above object, a self-cancelling device for a direction indicator according to the present invention has the following features. (a) Form three recesses in the body.
(b) A rotatable movable bracket is provided on the body. (c) Fix the operating lever to the movable bracket. (d) Fix the two side stoppers, the center stopper, and the spring housing to the movable bracket. (E) Inside the spring housing,
The engagement ball and compression spring are housed. (f) A ratchet structure is provided between the center stopper and the compression spring. (g) One end of the compression spring is supported by an engagement ball, and the other end of the compression spring is supported by a ratchet structure. (H) The engaging ball can be engaged with any one of the three recesses in the body according to the rotational movement of the movable bracket. (li)
Two cancel latches are formed in the ratchet structure. (v) When the cancel cam moves in the direction in which the operating lever is rotated and hits one of the cancel latch, the ratchet component will move against the compression spring to a point on the center stopper. It can be rotated as a fulcrum.

(Function) When the cancel cam moves in the direction in which the operating lever is rotated, the cancel cam hits one of the cancel latch, and at this time, the ratchet structure resists the compression spring and moves against the center stopper. Rotates around a single point. From this fulcrum,
Comparing the distance to the point where the compression spring acts on the ratchet structure and the distance from this fulcrum to the point where the canceller cam hits the canceller ratchet, the latter is more than several times the former, and the principle of lever and Due to the small amount of compression of the compression spring, the force with which the cancel cam pushes up on the ratchet structure is very small.

Therefore, depending on the rotational position of the steering wheel, when the ratchet component is moved by operating the operating lever, even if the canceler ratchet of the ratchet component comes into contact with the cancell cam and interferes, such interference can be avoided. When operating the operating lever against the interference, it is sufficient to add a very small force to compress the compression spring by a small amount in addition to the normal operating force required when there is no interference.
The operation of the operating lever does not become abnormally heavy, and therefore the operating lever can be operated with almost the same operating force as normal operating force.

When the cancel cam moves in the opposite direction to the direction in which the operating lever rotates, it functions in the same way as a conventional self-cancel device. In other words, the cancel cam hits one of the cancel ratchets,
At this time, the ratchet structure comes into contact with the side stopper of the movable bracket to return the movable bracket to its original neutral position.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is an overall perspective view of a self-cancelling device for a direction indicator that includes an embodiment of the present invention. The body 9, the operating lever 10, and the cylindrical body 11 for fixing the steering wheel are the same as those of the conventional device. The present invention is characterized by the configuration of the portions related to the movable bracket 12.

FIG. 1 is a partial plan view of the apparatus shown in FIG. 2, and best represents the features of this embodiment. In this figure, the operating lever 10 is rotated counterclockwise,
The engagement ball 13 is inserted into three recesses 14, 15, 16.
It is shown engaged with the recess 14 on the left side. In other words, the turn signal is displayed to indicate a left turn. The body 9 is provided with a rotatable movable bracket 12. The movable bracket 12 includes
The operating lever 10 is fixed. The movable bracket 12 also has two side stops 17,1.
8, a center stopper 19, and a spring housing 20 are fixed. The spring housing 20 houses an engagement ball 13 and a compression spring 21. A ratchet structure 22 is provided between the center stopper 19 and the compression spring 21.
One end of the compression spring 21 is supported by an engagement ball 13, and the other end of the compression spring 21 is supported by a ratchet structure 22. According to the rotational movement of the movable bracket 12, the engagement ball 13 and the three recesses 1 of the body 9
4, 15, and 16 can be engaged with each other. Two canceler latches 23 and 24 are formed in the ratchet structure 22.

When the steering wheel is rotated in the direction in which the operating lever 10 is rotated, the cancel cam 25 provided on the cylindrical body 11 fixed to the steering wheel rotates.
Rotating in the direction of arrow 26, the cancel cam 25 hits one of the cancel latch 24. At this time, the ratchet structure 22 is compressed by the compression spring 21.
, and rotates about a point D on the center stopper 19 as a fulcrum. At this time, the other canceller latch 23 is designed not to come into contact with the side stopper 17. The distance from the fulcrum D to the point E where the compression spring 21 acts on the ratchet structure 22, and the distance from the fulcrum D to the position F where the cancel cam 25 hits the cancel latch 24.
Comparing the distance to the point, the latter is several times more than the former. Therefore, due to the lever principle and the small amount of compression of the compression spring 21, the force with which the cancel cam 25 pushes up the ratchet structure 22 is very small. Further, even when the cancel cam 25 passes and the ratchet component 22 returns to its original position, the cancel latch 24 does not collide with the side stopper 18 and no abnormal noise is generated.

Furthermore, depending on the rotational position of the steering wheel, when the ratchet structure 22 is moved by operating the operating lever 10, the ratchet structure 2
Even if the two canceller latches 23 and 24 contact and interfere with the cancell cam 25, when operating the operating lever 10 against such interference, the normal operating force required in the case of no interference is required. To,
Since it is only necessary to apply a very small force to compress the compression spring 21 by a small amount, the operating lever 1
0 operation is not abnormally heavy, and therefore the operating lever 10 can be operated with almost the same operating force as normal operating force.

When the cancel cam 25 moves in the direction opposite to the direction in which the operating lever 10 is rotated, it functions in the same way as a conventional self-cancel device. That is,
The cancell cam 25 hits the inside of the cancell latch 24, and at this time, the latch structure 2
2 is a side stopper 18 of the movable bracket 12;
When this occurs, the movable bracket 12 is returned to its original neutral position.

When the engagement ball 13 is engaged with the recess 16, point G on the center stopper 19 becomes the rotational fulcrum of the ratchet structure 22.

(Effects of the Invention) As explained above, in the present invention, when the steering wheel rotates in the direction in which the operating lever rotates or depending on the rotational position of the steering wheel,
When the ratchet structure is moved by operating the operating lever, if the cancel latch of the ratchet structure and the cancel cam come into contact, the ratchet structure will move against the compression spring and move toward the center. Since the configuration rotates around a point on the stopper as a fulcrum, the required force in these cases is extremely small due to the lever principle and the amount of compression of the compression spring. Even in this case, there is no discomfort caused by the operation of the control lever becoming abnormally heavy, and even in the former case, the canceller ratchet does not collide with the side stopper like conventional ones, so there is no abnormal noise. It has the effect of preventing The compression spring itself has the effect of pressing the engagement ball against the recessed portion of the body with a sufficient compression force to stably maintain the operating position of the operating lever.

[Brief explanation of drawings]

1 is a partial plan view of the device shown in FIG. 2, FIG. 2 is an overall perspective view of a self-cancelling device for a direction indicator equipped with an embodiment of the present invention, and FIG. 3 is a partial plan view of the device shown in FIG. FIG. 2 is a partial plan view of a conventional example of a self-cancelling device for a container. 9...Body, 10...Operation lever, 12...
Movable bracket, 13... Engagement ball, 14, 1
5, 16... recess, 17, 18... side stopper, 19... center stopper, 20... spring housing, 21... compression spring, 22... ratchet structure, 23, 24... canceller ratchet, 25...cancel cam, D, G...fulcrum.

Claims (1)

[Claims] 1. A self-cancelling device for a direction indicator, which has the following features. (a) Form three recesses in the body. (b) A rotatable movable bracket is provided on the body. (c) Fix the operating lever to the movable bracket. (d) Fix the two side stoppers, the center stopper, and the spring housing to the movable bracket. (e) The engagement ball and compression spring are housed in the spring housing. (f) A ratchet structure is provided between the center stopper and the compression spring. (g) One end of the compression spring is supported by an engagement ball, and the other end of the compression spring is supported by a ratchet structure. (h) The engaging ball can be engaged with any one of the three recesses in the body according to the rotational movement of the movable bracket. (li) Form two cancel latches in the ratchet structure. (N) When the cancel cam moves in the direction in which the operating lever is rotated and hits one of the quincel ratchets, the latchet component will move against the compression spring and press against the center stopper. It can rotate around a single point.