JPH10255594A - Turn signal switch cancellation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damage or the like, improve durability, and enhance performance by disposing avoiding means moved on a switch actuator and this avoiding means driving the switch actuator of a first or a second operation position via a cam body by operation of a cancel cam. SOLUTION: On a top face of a switch actuator 14, when the actuator abuts with a cam body 31 at a first operation position (right turn direction position) or a second operation position (left turn direction position) of the switch actuator 14, and the cam body 31 is forcibly rotated by a protrusion 11a of the cancel cam 11, avoiding means for moving rotation of the cam body 31 so as to absorb it on the switch actuator 14 is disposed. This avoiding means consists of a slider 21 and elasticity means 26, the switch actuator 14 at the first or second operation position is driven via the cam body 31 by operation of the cancel cam 11 so as to prevent damage and deterioration, thereby making it possible to improve reliability.

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 canceling device for automatically returning an operation lever of a turn signal switch (direction indicator) of an automobile or the like to a neutral position.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to a turn signal switch shown in FIG. The figure is the actual opening 57-19914.
It is a principal part top view of the turn signal switch disclosed by the 6th publication.

According to FIG. 1, reference numeral 1 denotes a steering shaft having a projection 1a on a diagonal line, and 3 denotes a movable member made of plastics which is swingably mounted on a base member 7 about a fulcrum 2. Reference numeral 7a denotes a step provided on the wall of the base member 7, and 4 denotes an operation lever mounted on the movable member 3, which swings the movable member 3 from a neutral position to a right-turning position or a left-turning position. It is.

A cam body 5 is mounted on the steering shaft 1 side of the movable member 3 so as to be able to move back and forth, and a distal end portion 5a is provided on the steering shaft 1 side by a plate or a wire spring 8 mounted on a base member 7. When the cam member 5 that has been biased rearward swings the movable member 3 to the left and right at the neutral position of the movable member 3, the cam member 5 moves forward and the distal end portion 5a of the cam body 5 is steered. The shaft 1 is configured so as to be located within the rotation trajectory of the protrusion 1a.

Next, the operation of the turn signal switch will be described. First, when the operation lever 4 is rotated to the left turn direction position, the movable member 3 swings downward, and the elastic member provided on the movable member 3 is elastically deformable. The locking levers 6c, 6d provided on the arms 6a, 6b are locked to the other step 7a, and the operation lever 4
Is held in the left turn direction position, the cam body 5 is moved forward, and the tip 5a is projected to a position within the rotation locus of the protrusion 1a of the steering shaft 1.

Next, when the steering shaft 1 is rotated counterclockwise, the projection 1a and the tip 5a come into contact with each other.
Rocks and escapes.

Next, when the steering shaft 1 is rotated clockwise, the protrusion 1a and the tip 5a come into contact with each other, and the tip 5a swings to avoid the contact.
Is in contact with the arm 6a, so that the tip 5a and the protrusion 1a
Is not avoided.

Further, when the steering shaft 1 is to be rotated, the arm portion 6a is elastically deformed by the rear portion 5b of the cam body 5, and the locking position between the locking pieces 6c and 6d and the step portion 7a is changed to the original neutral position. To cancel the turn signal switch.

Similarly, when the steering shaft 1 is rotated clockwise while the operation lever 4 is locked by the driver's hand or the like while being held in the left turn direction position, the arm 5 is formed by the rear portion 5b of the cam body 5. 6a is further elastically deformed, and the cam body 5 rotates until the state of contact between the distal end portion 5a and the protruding portion 1a is avoided. As a result, even when the operation lever is locked, the cancellation structure is not damaged, and the rotation of the steering shaft 1 is not hindered.

When the operation lever 4 is turned rightward, the steering shaft 1 is operated in the same manner as described above.
By turning to the left, the turn signal switch can be canceled.

[0011]

However, in the above-mentioned conventional configuration, the two arms 6a and 6b are connected to the operation lever 4
Is formed so as to be elastically deformed at the time of left turn / right turn operation or cancellation, so that the arm 6
It is conceivable that a and 6b may be broken or deformed, resulting in inoperability. In a high temperature state, the plastic arms 6a and 6b are softened and the amount of deformation is increased. Therefore, the reliability of the canceling device of the turn signal switch is reduced.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a high-performance turn signal switch canceling device with improved durability.

[0013]

SUMMARY OF THE INVENTION In order to solve this problem, a turn signal switch canceling device according to the present invention sets a neutral position by a canceling cam having a protrusion around the periphery interlocked with rotation of a steering shaft and an operation lever. A switch actuating body that is turned to the first or second operating position through the switch actuating mechanism that holds the switch operating body in the first or second operating position; When the switch operating body is in the first or second operating position, it advances to a position where it can be engaged with a projection provided around the cancel cam, and when the switch operating body is in the neutral position, it does not move with the projection. A cam body that retreats to an engagement position, and also contacts the cam body at the first or second operating position of the switch operating body on the upper surface of the switch operating body, and passes through the cam body. An evasion means which moves on the switch actuating body so as to avoid the cam body at a position disengaged from the projection of the cancel cam when a certain or more drag is applied is arranged, and this evasion means is a first or a second evasion means. The switch operating body in the second operating position is driven via the cam body by the operation of the cancel cam.

Therefore, according to the present invention, since the elastic deformation of the arm portion made of the plastics member integrally formed with the movable member as described in the prior art is not used, the reliability is high. It is possible to provide a cancellation device for a turn signal switch.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is characterized in that a cancel cam having a protruding portion around the periphery thereof interlocked with the rotation of a steering shaft, and a first or second through a neutral position by an operation lever. A switch operating body that is turned to an operating position, a detent mechanism that holds the switch operating body in a first or second operating position, and a switch operating body provided on an upper surface of the switch operating body, wherein the first or second switch operating body is provided. A cam body that moves forward to a position where it can engage with a protrusion provided around the cancel cam when in the second operation position, and retreats to a position where it does not engage with the protrusion when the switch actuating body is in the neutral position; Similarly, when the switch body is brought into contact with the cam body at the first or second operating position of the switch body, and the cam body is forcibly rotated by the projection of the cancel cam. An avoiding means for moving the switch body so as to absorb the rotation of the cam body is disposed on the switch operating body, and the avoiding means moves the switch operating body in the first or second operating position by the operation of the cancel cam. It is driven through the body to prevent breakage and deterioration, and has an effect of enabling a highly reliable turn signal switch canceling device.

According to a second aspect of the present invention, the avoiding means according to the first aspect is incorporated in a switch actuating body having a sloping portion extending right and left, a concave portion formed at the intersection of the sloping portion, and a slider holding portion. A slider having an engagement portion for engaging the slider holding portion of the switch operating body on the lower surface and having a mounting portion for attaching elastic means to a rear portion, and a switch operating body having a central portion made of a leaf spring material. An elastic means having an R-shaped protrusion engaging with the concave portion and having attachment portions attached to the slider on the right and left sides enables an operation of a highly reliable turn signal switch canceling device. Having.

According to a third aspect of the present invention, the avoiding means is incorporated in a switch actuating body having a sloping portion extending right and left, a concave portion formed at the intersection of the sloping portion, and a slider holding portion. The lower surface has an engaging portion that engages with the slider holding portion of the switch operating body, and an R-shaped projection that engages with the concave portion of the switch operating body is provided integrally and elastically at the rear center. Since it was composed of sliders,
The number of parts and the number of assembling steps are reduced, so that it is possible to provide a highly reliable turn signal switch canceling device while reducing costs.

According to a fourth aspect of the present invention, the avoiding means is incorporated in a switch actuating body having an inclined portion extending right and left, a concave portion formed at the intersection of the inclined portion and a slider holding portion, and has a substantially U-shape. The left and right sides constitute an arm, and a slider made of an elastic thin plate spring having an R-shaped projection provided in the center and engaging with the recess of the switch actuating body is provided. Since the range that does not affect the moving operation is guided by the slider holding part of the switch actuating body, it is possible to reduce the number of parts and assembling man-hours, reduce costs and realize a highly reliable turn signal switch canceling device. Has the effect of

According to a fifth aspect of the present invention, a cancel cam having a protrusion around the periphery thereof interlocked with the rotation of the steering shaft, and the operating lever is turned to the first or second operating position via the neutral position. A switch operating body, a detent mechanism for holding the switch operating body in the first or second operating position, and a switch mechanism provided on the upper surface of the switch operating body when the switch operating body is in the first or second operating position. A cam body which advances to a position where it can be engaged with a projection provided around the cancel cam, and which retreats to a position where the switch is not engaged with the projection when the switch operating body is at a neutral position; A guide member consisting of a substantially U-shaped thin plate spring having arm portions at the left and right ends which contact the cam body at the first or second operating position of the switch actuating body is provided on the upper surface of the switch, and only the arm portions are free. Since become so attached configuration has the effect that the number of parts, reduce the number of assembly steps to enable canceling device of high reliability turn signal switch while realizing cost reduction.

According to a sixth aspect of the present invention, in addition to the fifth aspect, the guide member is formed of a thin leaf spring material having a substantially U-shape, a substantially arc-shaped cross section, and left and right arms. The structure is fixed to the switch operating body so as to be free, so that the number of parts and the number of assembling steps can be reduced, the cost can be reduced, and a highly reliable turn signal switch canceling device can be realized.

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is an exploded perspective view of a main part of a turn signal switch according to an embodiment of the present invention, and FIG. 2 is a plan view of the main part showing a state where the turn signal switch is mounted on a steering device.

In FIG. 1 and FIG. 2, reference numeral 11 denotes a cancel cam which is interlocked with the rotation of a steering shaft (not shown), and has two protrusions 11a formed on the outer periphery.
Reference numeral 12 denotes a switch case provided on the periphery of the cancel cam 11 and having an open upper surface. A cover 13 is attached so as to close the upper surface opening.

Reference numeral 14 denotes a switch actuating body, which is housed in the switch case 12 and has pins 14 provided above and below.
a, 14b are the hole 12a of the switch case 12 and the cover 1
By being fitted into the third hole 13a, it can swing. Reference numeral 15 denotes an operation lever, which is integrally attached to the switch operating body 14 with a pin 16. Reference numeral 17 denotes a hole formed at the tip of the switch operating body 14, into which a moderating pin 19 urged outward by a spring 18 is inserted. 20
Is a moderation uneven portion formed on the inner surface of the distal end portion of the switch case 12, and the moderation pin 19 elastically contacts the moderation unevenness portion 20.

Reference numeral 21 denotes a slider, which has protrusions 21a at the left and right ends.
21b is provided. A concave groove 22 is formed on the lower surface of the slider 21, and the concave groove 22 is fitted to a protruding wall 24 in a slider housing groove 23 of the switch operating body 14. Further, notches 25a and 25b are formed on the rear side of the slider 21.

Reference numeral 26 denotes an elastic means made of a leaf spring material, which has bent portions 26a and 26b inserted into the notches 25a and 25b of the slider 21 on the left and right, and an R-shaped protrusion 26c at the center. The elastic means 26 has a protrusion 29 provided in the slider 21 in a recess 29 provided at the intersection of an inclined portion 28 extending left and right in the slider accommodating groove 23 of the switch operating body 14 in a state where the elastic means 26 is incorporated in the slider 21. The slider 21 is incorporated in the switch operating body 14 so as to be positioned so that the portion 26c is located. The slider 21 and the elastic means 26 constitute an avoiding means.

Reference numeral 30 denotes a switch actuating body 1 that regulates an operating range of a cam body 31 provided at a front portion of the switch actuating body 14.
The cam body 31 has a concave groove 33 on the lower surface, and pins 31a and 31b serving as a fulcrum of rotation up and down. Hook portions 35a, 35b at both ends
The body of the tension coil spring 35 holding the
And insert the pin 31a into the long hole 36 of the cover 13.
Then, a pin 31b is assembled along the V-shaped projection 32 in the concave portion 30 of the switch operating body 14. Reference numeral 37 denotes a stopper provided in the switch case 12 for restricting the rotation angle of the switch operating body 14. The cover 13 is fixed to the switch case 12 by fixing means such as screws. Reference numeral 27 denotes a switch unit incorporated in the switch case 12 and controlled by the switch operating body 14.

The operation of the turn signal switch configured as described above will be described with reference to FIGS. 3 to 5. First, when the operation lever 15 is at the neutral position shown in FIG. Resiliently contacts the central concave portion of the moderation uneven portion 20, and the switch operating body 14 and the operation lever 15 are held at the neutral position. Further, since the pin 31b of the cam body 31 is located at the apex of the V-shaped projection 32 of the switch operating body 14, the cam body 31 is located in the direction away from the cancel cam 11 against the elastic force of the tension coil spring 35. . As a result, the tip 31c of the cam body 31 is located outside the rotation locus 11b of the protrusion 11a of the cancel cam 11 indicated by the two-dot chain line. Therefore, even if the cancel cam 11 rotates, the cam body 31 has no influence.

FIG. 3 shows a state in which the operation lever 15 is rotated in the direction of arrow A from the neutral position and is locked at the right turn direction position. When the rotation of the switch operating body 14 is restricted by the stopper 37, the moderation pin 19 is located on the inclined portion over the convex portion of the moderation unevenness portion 20, and is locked in the right-turn direction.

In the course of this operation, the pin 31b of the cam body 31 is disengaged from the apex of the V-shaped projection 32 of the switch operating body 14 and abuts on the slope 32a of the V-shaped projection 32 by the elastic force of the tension coil spring 35. Cancel cam 1
It moves in one direction, and the tip 31c is located inside the rotation trajectory 11b of the projection 11a of the cancel cam 11 indicated by the two-dot chain line. The slider 21 rotates together with the switch operating body 14 so that the protrusion 21 a contacts the body 31 d of the cam body 31.

Although not shown, when the operating lever 15 is turned from the neutral position in the direction of the arrow A and is turned to the left turn position, the switch operating body 14 is restricted from turning by the other stopper 37, and the moderating pin 19 is set in moderation. It is positioned on the inclined portion over the other convex portion of the concave / convex portion 20, and is locked at the left turn direction position. Similarly, the cam body 31 is displaced from the apex of the V-shaped projection 32 of the switch actuating body 14 by the pin 31b and is brought into contact with the other slope 32b of the V-shaped projection 32. , And the distal end portion 31c is indicated by a two-dot chain line.
Is located inside the rotation locus 11b of the protrusion 11a.

The slider 21 rotates together with the switch operating member 14 so that the other protrusion 21b is connected to the other body 3 of the cam body 31.
1e.

The operation in the state where the operation lever 15 is operated to the right turn direction position or the left turn direction position is the same, and only the case of the right turn direction position will be described below.

As shown in FIG. 3, when the operation lever 15 is operated to the right turn direction position, the cancel cam 11
Are rotated in the same direction, that is, in the direction of arrow B, the protrusion 11a of the cancel cam 11 comes into contact with the distal end 31f of the cam body 31 so that the body 31d of the cam body 31 is moved to one side of the slider 21 as shown by a broken line. The cam body 31 swings in the direction of arrow C separating from the protrusion 21a, and returns to the original position when the protrusion 11a of the cancel cam 11 passes. Then, the switch operating body 14 and the operation lever 15 are held as they are at the right turn direction position.

Next, as shown in FIG.
1 is rotated in the opposite direction, that is, in the direction of arrow B ', the projection 11a of the cancel cam 11
, The body 31d of the cam body 31 is swung in the direction of arrow C 'to engage with the projection 21a of the slider 21 and press it in the direction of arrow C'.

As a result, the slider 21 is urged to move in the direction of arrow D.
Is applied to the switch operating body 14 through the switch, the switch operating body 14 and the operation lever 15 overcome the holding force of the slider 21 and are turned in the direction of the arrow A 'to return to the neutral position.

Next, the mechanism of the rotation of the cancel cam 11 in the direction of arrow B 'when the operation lever 15 is locked by the driver's hand or the like in the state shown in FIG. 4 will be described.

In FIGS. 4 and 5, the cancel cam 11
Of the cam body 31, the body 31d of the cam body 31 swings in the direction of arrow C 'and engages with the protrusion 21a of the slider 21 to move it in the direction of arrow C'. Press. Here, the switch operating body 14 is
, The slider 21 compresses the elastic means 26, and the protrusion 26c of the elastic means 26 is disengaged from the concave portion 29 of the switch operating body 14, moves in the direction of arrow D while moving to the inclined part 28, and is canceled. Projection 1 of cam 11
Avoid rotation of 1a. When the tip of the projection 11a of the cancel cam 11 passes through the tip 31g of the cam body 31, the slider 21 returns to the original state of FIG. 4 by the spring pressure of the elastic means 26 and the restoring force generated by the inclined portion 28. Return.

By adopting the method of moving the slider 21 as in this embodiment, it is possible to provide a highly reliable turn signal switch canceling device which can be constructed without the need to elastically deform the projection 21a and which can be used for a long time. be able to.

Next, a second embodiment will be described with reference to FIGS. FIG. 6 is a perspective view of a main part of the second embodiment. Reference numeral 38 denotes a slider having another configuration, which is made of a material called engineering plastics such as polyacetal resin (POM), and protrudes right and left. Parts 38a and 38b are provided. A concave groove 39 is formed on the lower surface of the slider 38, and is fitted to the protruding wall 24 in the slider housing groove 23 of the switch operating body 14. Further, the rear portion of the slider 38 has arms 38c and 38d for generating elasticity and an R-shaped protrusion 38e at the center thereof.

As in the first embodiment, the slider 38 is provided in the slider housing groove 2 of the switch operating body 14.
The projection 38e is incorporated so as to be located in a concave portion 29 provided at the intersection of the inclined portions 28 extending left and right in the inside 3.

Next, this operation will be described. When the switch operating body 14 and the operation lever 15 are in the neutral position, or when the cancel cam 11 is rotated in the same direction, that is, in the direction of the arrow B when it is in the right turn direction position, This is the same as in the first embodiment, and a description thereof will be omitted. When the switch operating body 14 and the operation lever 15 are in the right-turn direction position and the cancel cam 11 is rotated in the opposite direction, that is, the direction of the arrow B ', as shown in FIG.
Abuts against the tip 31g of the cam body 31, the body 31d of the cam body 31 is swung in the direction of arrow C 'to engage with the protrusion 38a of the slider 38 and press it in the direction of arrow C'.

As a result, the slider 38 is urged to move in the direction of arrow D.
c, 38d and the elastic force of the projection 38e are applied to the switch operating body 14, so that the switch operating body 14 and the operating lever 15 overcome the holding force of the slider 38 and are rotated in the direction of the arrow A 'to return to the neutral position. Is done.

Next, the mechanism of rotation of the cancel cam 11 in the direction of arrow B 'in a state where the operation lever 15 is locked by the driver's hand or the like in the state shown in FIG. 7 will be described.

As shown in FIGS. 7 and 8, the projection 11a of the cancel cam 11 comes into contact with the tip 31g of the cam body 31, and the body 31d of the cam body 31 swings in the direction of the arrow C 'to move the slider 38. Of the arrow C '.
Press in the direction. Here, since the switch operating body 14 is locked via the operation lever 15, the slider 38
Is compressed by the arm portions 38c and 38d of the slider 38,
The protrusion 38e moves in the direction of arrow D while moving to the inclined portion 28 while being disengaged from the concave portion 29 of the switch operating body 14. The tip of the projection 11a of the cancel cam 11 is a cam body 31.
When the slider 38 has passed the distal end 31g of the arm, the spring pressure generated by the arms 38c and 38d and the inclination 28
7 returns to the original state shown in FIG.

According to the second embodiment, a highly reliable turn signal switch canceling device can be realized while reducing the number of parts and the number of assembling steps.

Further, the third embodiment will be described with reference to FIGS. FIG. 9 is a perspective view of a main part,
Reference numeral 40 denotes a slider having another configuration, which is made of a thin plate spring material such as phosphor bronze, and has arm portions 40a, 4 at the left and right ends.
0b is provided. A substantially central portion of the slider 40 has an R-shaped protrusion 40c at an upper portion thereof with a width of approximately 1/2 in the plate width direction, and a lower portion at a boundary of the slit 40d.
0e.

Slider storage groove 2 of switch operating body 14
3, a sloping portion 28 extending right and left, a concave portion 29 provided at the intersection point, and a lower straight portion 4 of the slider 40.
0e, and has a projection 41 for guiding the slider 4
The zero protrusion 40 c is incorporated so as to engage with the concave portion 29 of the switch operating body 14.

Next, this operation will be described. The operation when the switch operating body 14 and the operation lever 15 are in the neutral position, and when the cancel cam 11 is rotated in the same direction, that is, in the direction of the arrow B when the switch cam is in the right-turn direction position is described. This is the same as in the first embodiment, and a description thereof will be omitted. When the switch operating body 14 and the operation lever 15 are in the right-turn direction position and the cancel cam 11 is rotated in the opposite direction, that is, the direction of the arrow B ', as shown in FIG.
a comes into contact with the distal end portion 31g of the cam body 31, the body 31d of the cam body 31 is swung in the direction of arrow C ', and the slider 40
And presses it in the direction of arrow C '.

As a result, the slider 40 is urged to move in the direction of arrow D, and the moving urging force is applied to the switch operating body 14 by the elastic force of the projection 40c and the slider 40. Operation lever 1
5 is rotated in the direction of arrow A 'by overcoming the holding force of the slider 40 and returned to the neutral position.

Next, the mechanism of the rotation of the cancel cam 11 in the direction of the arrow B 'in the state shown in FIG. 10 in which the operation lever 15 is locked by the driver's hand or the like will be described.

As shown in FIGS. 10 and 11, the projection 11a of the cancel cam 11 comes into contact with the tip 31g of the cam body 31, and the body 31d of the cam body 31 is swung in the direction of arrow C 'to move the slider 40. And presses it in the direction of arrow C '. Here, since the switch operating body 14 is locked via the operation lever 15, the slider 40 is compressed by the arm portions 40f and 40g of the slider 40, and the protrusion 40c is disengaged from the concave portion 29 of the switch operating body 14 and the inclined portion 28. While moving in the direction of arrow D. When the tip of the projection 11a of the cancel cam 11 passes through the tip 31g of the cam body 31, the slider 40 is restored to its original shape by the spring pressure generated in the arms 40f and 40g and the restoring force generated by the inclined portion 28. It returns to the state of 10.

According to this embodiment, the slider 40
Is made of a thin plate spring material, the temperature characteristics and the elastic characteristics are further improved, and a highly reliable turn signal switch canceling device can be realized at low cost.

Further, a fourth embodiment will be described with reference to FIGS. FIG. 12 is a perspective view of a main part. Reference numeral 42 denotes a substantially U-shaped guide member made of a thin plate spring material such as phosphor bronze. Arms 42a and 42b are provided at left and right ends. The switch operating body 14 has two positioning portions 43 for inserting and positioning the guide members 42, and the wall portion 4 for guiding the outer circumferences of the arm portions 42 a and 42 b of the guide members 42.
4a and 44b are set shorter than the arms 42a and 42b.

Next, this operation will be described. The operation when the switch operating body 14 and the operation lever 15 are in the neutral position, and when the cancel cam 11 is rotated in the same direction, that is, in the direction of arrow B when it is in the right-turn direction position, will be described. This is the same as in the first embodiment, and a description thereof will be omitted. When the switch operating body 14 and the operation lever 15 are in the right-turn direction position and the cancel cam 11 is rotated in the opposite direction, that is, the direction of the arrow B ', as shown in FIG.
a comes into contact with the distal end portion 31g of the cam body 31 and the body 31d of the cam body 31 is swung in the direction of arrow C 'to guide the guide member 42.
And presses it in the direction of arrow C '.

Thus, the guide member 42 is urged to move in the direction of arrow D. At this time, the arm 42 of the guide member 42
By setting the bending deformation load of a to be higher than the right-turning direction position holding force of the switch operating body 14 and the operation lever 15, the holding force is overcome and the arm is rotated in the direction of arrow A 'to return to the neutral position. You.

Next, the mechanism of the rotation of the cancel cam 11 in the direction of arrow B 'when the operation lever 15 is locked by the driver's hand or the like in the state shown in FIG. 14 will be described.

As shown in FIG. 14, the cancel cam 11
Of the cam body 31 abuts on the tip 31g of the cam body 31, the body 31d of the cam body 31 swings in the direction of the arrow C 'and engages with the arm 41a of the guide member 41 to move it in the direction of the arrow C'. Press Here, the switch operating body 14 is
, The arm 42a of the guide member 42 starts to be elastically deformed with the tip of the wall 44a of the switch operating body 14 as a fulcrum. Then, the distal end portion 31g of the cam body 31 is elastically deformed until it passes through the projection 11a of the cancel cam 11, and then returns to the original state of FIG.

According to this embodiment, since the guide member 42 made of a thin leaf spring material is used instead of the slider, the sliding movement is eliminated, and the space can be saved in the width direction, and the reliability is improved. A cancellation device for the turn signal switch can be realized at low cost.

FIGS. 15 (a) and 15 (b) show another embodiment of a guide member having a different shape. Reference numeral 45 denotes a substantially U-shaped guide member made of a thin plate spring made of phosphor bronze or the like. (Cross section air) has a substantially arc shape in the width direction as shown in FIG. Arms 45a, 45 at the left and right ends
b is provided. A positioning portion 43 for inserting and positioning the guide member 45 is provided on the switch operating body 14, and walls 44a and 44b for guiding the outer periphery of the arms 45a and 45b of the guide member 45 are set shorter than the arms 45a and 45b. I have. Here, by forming the guide member 45 into a substantially arcuate cross-sectional shape, it is possible to obtain a characteristic that the guide member 45 does not deform until a certain load is applied, and reverses when the load exceeds the certain load.

Next, this operation will be described. The operation when the switch operating body 14 and the operation lever 15 are in the neutral position, or when the cancel cam 11 is rotated in the same direction, that is, in the direction of the arrow B when it is in the right-turn direction position is described. This is the same as in the first embodiment, and a description thereof will be omitted. When the switch operating body 14 and the operation lever 15 are in the right-turning position and the cancel cam 11 is rotated in the opposite direction, that is, the direction of the arrow B ', as shown in FIG.
a comes into contact with the distal end portion 31g of the cam body 31, and the body 31d of the cam body 31 is swung in the direction of the arrow C 'to guide the guide member 44.
And presses it in the direction of arrow C '.

As a result, the guide member 44 is urged to move in the direction of arrow D. At this time, the arm 45 of the guide member 45
The switch load 14 and the operating lever 15
Is set higher than the right-turning direction position holding force, the holding force is overcome, the rotation is performed in the direction of the arrow A ′, and the neutral position is returned.

Next, the mechanism of the rotation of the cancel cam 11 in the direction of arrow B 'when the operation lever 15 is locked by the driver's hand or the like in the state shown in FIG. 16 will be described. As shown in FIGS. 16 and 17, the projection 11a of the cancel cam 11 comes into contact with the tip 31g of the cam body 31, and the body 31d of the cam body 31 is swung in the direction of arrow C 'to move the guide member 44. It engages with the arm 44a and presses it in the direction of arrow C '. Here, since the switch operating body 14 is locked via the operation lever 15, the arm 45 a of the guide member 45 is connected to the switch operating body 14.
When the load exceeds a certain load with the tip 44a of the wall 44 as a fulcrum, the wall 44 is turned over. Then, the inverted state is maintained until the distal end portion 31g of the cam body 31 passes through the protrusion 11a of the cancel cam 11, and then returns to the original state of FIG.

According to this embodiment, the cross-sectional shape of the guide member 44 made of a thin leaf spring is made substantially arcuate, so that the reversal load is higher than the deformation starting load of the guide member made of a straight plate. Becomes possible. Therefore, it is possible to realize a highly reliable turn signal switch canceling device that can be made thinner by that much and can save space at lower cost.

[0064]

As described above, according to the present invention, the reliability can be improved by providing the switch operating body with the avoiding means constituted by a slider or the like and by employing the guide member made of a thin plate spring material. This has the effect that a very high turn signal switch canceling device can be realized at low cost.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a turn signal switch canceling device according to the present invention.

FIG. 2 is a top view of a main part without a cover showing the neutral position.

FIG. 3 is a top view of a main part with a cover removed, showing a state in the right-turn direction position.

FIG. 4 is an initial top view when the steering shaft in FIG. 3 is rotated to the left.

FIG. 5 is a top view of the cam body when the steering shaft is rotated left in FIG. 3 during operation;

FIG. 6 is an exploded perspective view of a main part showing the second embodiment.

FIG. 7 is an initial top view when the steering shaft in FIG. 6 is rotated to the left.

FIG. 8 is a top view of the cam body when the steering shaft is rotated leftward in FIG.

FIG. 9 is an exploded perspective view of a main part showing the third embodiment.

FIG. 10 is an initial top view when the steering shaft in FIG. 9 is rotated to the left.

FIG. 11 is a top view of the cam body when the steering shaft is rotated leftward in FIG. 9;

FIG. 12 is an exploded perspective view of a main part showing the fourth embodiment.

FIG. 13 is an initial top view when the steering shaft is rotated to the left in FIG. 12;

FIG. 14 is a top view of the cam body when the steering shaft is rotated leftward in FIG.

FIG. 15 is an exploded perspective view of a main part showing another embodiment.

FIG. 16 is an initial top view when the steering shaft is rotated to the left in FIG. 15;

FIG. 17 is a top view of the cam body during left rotation of the steering shaft in FIG. 15 during operation of the cam body;

FIG. 18 is a plan view of a main part of a conventional turn signal switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Cancel cam 14 Switch operating body 15 Operation lever 20 Moderation uneven part 21 Slider 26 Elastic means 31 Cam body 32 V-shaped projection

Claims (6)

[Claims] 1. A cancel cam having a protrusion around its periphery interlocked with the rotation of a steering shaft, a switch actuating body which is turned to a first or second operation position via a neutral position by an operation lever, and A detent mechanism for holding the operating body in the first or second operating position; and a moderating mechanism provided on an upper surface of the switch operating body and provided around the cancel cam when the switch operating body is in the first or second operating position. A cam body that advances to a position where it can be engaged with the projected portion and retreats to a non-engaged position with the projection when the switch operating body is at the neutral position; When the cam body comes into contact with the cam body in the first or second operation position and is forcibly rotated by the projection of the cancel cam, the rotation of the cam body is absorbed on the switch operating body. Device for canceling a turn signal switch in which an avoiding means for moving is arranged. The avoidance means is incorporated in a switch actuating body having an inclined portion extending to the left and right, a concave portion formed at the intersection of the inclined portion, and a slider holding portion. A slider having an engaging portion for engaging the slider holding portion and having a mounting portion for attaching an elastic means to a rear portion thereof; and an R-shaped projection formed at a central portion made of a leaf spring material and engaging with the concave portion of the switch operating body. The turn signal switch canceling device according to claim 1, further comprising an elastic means having a portion and a mounting portion mounted on the left and right sides of the slider. 3. The switch means is incorporated in a switch actuating body having an inclined portion extending right and left, a concave portion formed at the intersection of the inclined portion, and a slider holding portion. 2. A slider having an engaging portion for engaging with the slider holding portion, and an R-shaped projection integrally and elastically provided at the center of the rear portion for engaging with the concave portion of the switch actuating body. A turn signal switch canceling device according to claim 1. 4. The avoiding means is incorporated in a switch actuating body having an inclined portion extending right and left, a concave portion formed at an intersection of the inclined portion, and a slider holding portion, and has a substantially U-shaped arm having left and right arms. A slider made of an elastic thin plate spring provided with an R-shaped projection that engages with the recess of the switch actuating body at the center, and a range that does not affect the left-right movement of the R-shaped projection of the slider. The device for canceling a turn signal switch according to claim 1, wherein the device is guided by a slider holding portion of the switch operating body. 5. A cancel cam having a projection around the rotation of the steering shaft, a switch actuated body turned to a first or second operation position through a neutral position by an operation lever, and a switch. A detent mechanism for holding the operating body in the first or second operating position; and a moderating mechanism provided on an upper surface of the switch operating body and provided around the cancel cam when the switch operating body is in the first or second operating position. A cam body that moves forward to a position where it can be engaged with the projected portion, and retreats to a position where it is disengaged with the projection when the switch operating member is in the neutral position; and a switch operating member also on the upper surface of the switch operating member. A guide member consisting of a substantially U-shaped thin plate spring having arm portions at the left and right ends which contact the cam body at the first or second operation position of the first or second operation position, so that only the arm portion is free. Turn signal switch cancellation device. 6. The guide member is formed of a thin leaf spring material having a substantially U-shape, a substantially arc-shaped cross section, and left and right arms, and fixed to a switch operating body so that only the arms are free. The turn signal switch canceling device according to claim 5.