JP2009173198A - Vehicular turn lever switch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular turn lever switch device capable of reducing a number of parts and saving cost. <P>SOLUTION: The vehicular turn lever switch device includes a bracket 4 rotatably arranged in a rotation plane surface of a cancel cam 2, and coupled to a turn lever 3; a rachet 5 arranged between the bracket 4 and the cancel cam 2 so as to move backward/forward and rotate, and rotating by receiving rotating force of the cancel cam 2; and an overload releasing mechanism 6 having a rotation returning force transmitting member 6A receiving the rotating force from the rachet 5 and transmitting that to the bracket 4 as rotation returning force, and releasing an overload received by the rotation returning transmitting member 6A. In the overload releasing mechanism 6, the rotation returning force transmitting member 6A is arranged so as to move backward/forward to the bracket 4, and integrally provided with a click piece 11B for selectively disposing the turn lever 3 at any position of a neutral position, a left turn instruction rotating position, and a right turn instruction rotating position. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle turn lever switch device, and more particularly, to a turn lever for operating a direction indicating switch that can be rotated and returned from a left turn instruction turning position or a right turn instruction turning position to a neutral position by rotation of a steering shaft. The present invention relates to a vehicle turn lever switch device.

  As a conventional vehicle turn lever switch device, there is one provided with a turn lever for switching contacts of a turn signal switch (direction indicating switch) (Patent Document 1).

  The turn lever switch device for a vehicle includes a turn lever described above, a cancel cam that rotates by rotating a steering wheel, a bracket that can be rotated by the rotation of the cancel cam and the turn lever, and a cancel cam mounted on the bracket. The ratchet is configured to transmit a rotational force as a rotational return force.

  The cancel cam has a cam portion and is disposed on the outer peripheral surface of the steering shaft that is inserted through the steering column. And it is comprised so that it may rotate with a steering shaft.

  The bracket has a pair of rotation return force receiving portions, is rotatably held on the outer peripheral surface of the steering column via a switch mounting base, and is connected to a turn lever. Then, the turn lever is rotated from the neutral position to the left turn instruction turning position or the right turn instruction turning position by turning counterclockwise (left turn instruction turning direction) or clockwise (right turn instruction turning direction). Further, when the ratchet is turned by turning the steering wheel in the canceling direction (turning return direction of the turn lever) (turning the canceling cam), one turning return force receiving portion or the other turning return force It is configured to receive a turning return force from the receiving portion and turn and return from the left turn instruction turning position or the right turn instruction turning position to the neutral position. The switch mounting base is equipped with a direction indicating switch that switches contacts according to the pivot position of the bracket (turn lever).

  The ratchet is disposed between the cancel cam and the bracket so as to be able to advance and retract, and is rotatably held between the pair of rotational return force receiving portions. Then, in the neutral (OFF) state of the direction indicating switch (the turn lever is disposed at the neutral position), the whole is out of the rotation area of the cam portion, and the left turn indicating state of the direction indicating switch (the turn lever is turned to the left turn direction). Part (cancellation cam side end part) is arranged in the rotation area of the cam part respectively in the state arranged in the movement position) or the right turn instruction state (state where the turn lever is arranged in the right turn instruction rotation position). Yes.

  With the above configuration, when the turn lever is rotated from the neutral position to the left turn instruction turning direction and arranged at the left turn instruction turning position, the bracket is turned in the same direction and the direction indication switch is set to the left turn instruction state. At the same time, the ratchet advances toward the cancel cam, and the end portion on the cancel cam side is arranged from outside the rotation region of the cam portion to within the rotation region. In this state, when the steering wheel is turned in the turn lever turning return direction (clockwise), the ratchet turns counterclockwise and presses one turning return force receiving portion. The bracket and the turn lever are rotated clockwise, the direction indicating switch is turned off, and the turn lever is returned from the left turn indicating rotation position to the neutral position.

  On the other hand, when the turn lever is turned from the neutral position in the right turn instruction turning direction and placed in the right turn instruction turning position, the bracket is turned in the same direction and the direction indication switch is in the right turn instruction state, and the ratchet Advances toward the cancel cam side, and the end portion on the cancel cam side is arranged from outside the rotation region of the cam portion to within the rotation region. In this state, when the steering wheel is turned in the turn lever turning return direction (counterclockwise), the ratchet turns clockwise and presses the other turning return force receiving portion. The bracket and the turn lever are rotated counterclockwise, the direction indicating switch is turned off, and the turn lever is rotated and returned from the right turn instruction rotating position to the neutral position.

  By the way, in this type of vehicle turn lever switch device, the turn lever is maintained at the left turn instruction turning position or the right turn instruction turning position, and the steering wheel is turned clockwise or counterclockwise. In this case, the overload release mechanism comprising a movable back plate for transmitting the rotational return force and allowing the return spring for the impact force release to allow the ratchet to rotate (release the overload on the ratchet) is provided between the bracket and the ratchet. It is arranged between.

  The turn lever switch device for a vehicle having such an overload relief mechanism is configured to cancel the steering wheel in the left turn instruction state or right turn instruction state of the direction indicator switch (clockwise in the left turn instruction state or right turn instruction state of the direction indicator switch). (Or counterclockwise), the cancel cam rotates clockwise or counterclockwise to press the ratchet, and the ratchet rotates counterclockwise or clockwise by the pressing of the cancel cam.

In this case, when the ratchet turns, the turning power is received by the moving back plate for transmitting the turning return force, and the turning force of the ratchet is allowed against the resilience of the return spring for overload relief (overload). Move in the direction to escape. For this reason, the turning force of the ratchet is not transmitted to the bracket (turn lever), only the ratchet is rotated, and the state where the turn lever is arranged at the left turn instruction turning position or the right turn instruction turning position is maintained.
JP 2006-347447 A

  However, according to the conventional vehicle turn lever switch device having the moving back plate and the return spring, in addition to the pressing spring for pressing the moderation piece, the moving back plate is interposed between the ratchet and the bracket and the return spring is required. Therefore, there is a problem that the number of parts is increased and the cost is increased.

  Accordingly, an object of the present invention is to provide a vehicle turn lever switch device that can reduce the number of parts and thus can reduce the cost.

  In order to achieve the above object, the present invention provides a vehicle equipped with a turn lever for operating a direction indicating switch that can be rotated and returned from a left turn instruction rotation position or a right turn instruction rotation position to a neutral position by rotation of a steering shaft. In the turn lever switch device, a cancel cam that rotates together with the steering shaft, a bracket that is rotatably disposed in a rotation plane of the cancel cam and is connected to the turn lever, the bracket and the cancel cam, And a ratchet that is arranged to be able to move forward and backward, and to rotate by receiving the rotational force of the cancel cam, and a rotational return force transmission that receives rotational force from the ratchet and transmits it to the bracket as a rotational return force. An overload release mechanism for releasing overload received by the rotation return force transmission member, The overload relief mechanism is configured such that the rotation return force transmission member is disposed so as to be able to advance and retreat in the bracket, and the turn lever is positioned at any one of the neutral position, the left turn instruction rotation position, and the right turn instruction rotation position. The vehicle turn lever switch device is provided integrally with a moderation piece for selective disposition.

  According to the present invention, the number of parts can be reduced, and the cost can be reduced.

[Embodiment]
FIG. 1 is an exploded perspective view for explaining the entire vehicle turn lever switch device according to the embodiment of the present invention. FIG. 2 is a plan view for explaining the entire vehicle turn lever switch device according to the embodiment of the present invention.

[Overall configuration of vehicle turn lever switch device]
1 and 2, a vehicle turn lever switch device denoted by reference numeral 1 includes a cancel cam 2 that rotates by rotating a steering wheel (not shown), and a left turn instruction by rotation (rotation) of the cancel cam 2. A turn lever 3 that can be returned from a turning position or a right turn instruction turning position to a neutral position, a bracket 4 that can be turned by turning the turn lever 3 and the cancel cam 2, and a cancel cam 2 The ratchet 5 is capable of transmitting the rotational force as a rotational return force and an overload release mechanism 6 for releasing the overload from the ratchet 5 to the bracket 4.

(Configuration of cancel cam 2)
As shown in FIG. 2, the cancel cam 2 is disposed on the outer peripheral surface of a steering shaft (not shown) that passes through a steering column (not shown) along the central axis. And it is comprised so that it may rotate with arrow A1 direction (clockwise direction) or arrow A2 direction (counterclockwise direction) with a steering shaft. On the outer peripheral surface of the cancel cam 2, a pair of cam portions 20, 20 that are arranged in parallel at a predetermined interval in the circumferential direction are integrally provided. On the inner peripheral surface of the cancel cam 2, a plurality of (three in the embodiment) cam mounting portions 21, 21,... Are arranged integrally in parallel at a predetermined interval (equal interval) in the circumferential direction.

(Configuration of turn lever 3)
As shown in FIGS. 1 and 2, the turn lever 3 is connected to an end portion (turn lever side end portion) of the bracket 4 opposite to the cancel cam side end portion. Then, between the left turn instruction rotation position and the right turn instruction rotation position, it rotates together with the bracket 4 around the pivot pin 40 in the direction of the arrow B1 (left turn instruction rotation direction) or the arrow B2 direction (right turn instruction rotation direction). It is configured to be operated and to switch the contact of a direction indicating switch (not shown).

(Configuration of bracket 4)
As shown in FIGS. 1 and 2, the bracket 4 has a pivot pin 40 at the end of the turn lever, is held on the outer peripheral surface of the steering column via a switch mounting base (case) 7, and The moderation mechanism 11 is selectively disposed at any one of a neutral position and a left / right turn instructing rotation position. Then, the turn lever 3 in the neutral position rotates in the left turn instruction rotation direction (counterclockwise direction: arrow B1 direction) or the right turn instruction rotation direction (clockwise direction: arrow B2 direction). And the turn lever 3 and the left turn instruction turning position or the right turn instruction turning position, and the steering wheel turning operation in the cancel direction (turn lever turning return direction) (turning the cancel cam 2). ), The rotation return force is received from a rotation return force transmission member (described later), and the left turn instruction rotation position or the right turn instruction rotation position is returned to the neutral position. . As a material of the bracket 4, for example, a plastic material such as POM (polyoxymethylene) resin is used.

  The base 7 is parallel to a direction perpendicular to the advancing / retreating direction (arrow C1 direction and arrow C2 direction) of the ratchet 5 at the end of the cancel cam, and the ratchet return springs (tensile coil springs) 8 and 9 are extended. Thus, locking pins 70 and 71 for locking the respective one side ends are provided. Further, the base 7 has a switch cover (not shown) having a long hole 72 extending in a direction (arrow C1 direction and arrow C2 direction) in which the ratchet 5 advances and retreats in and out of the rotation region 10 of the cam portions 20, 20. It is arranged.

  The moderation mechanism 11 includes an uneven moderation surface portion 11A provided on the cancel cam side of the base 7 and a moderation piece 11B pressed against the moderation surface portion 11A by a pressing spring 12, which is disclosed in, for example, Japanese Patent Application Laid-Open No. 10-236225. Previously disclosed by the applicant.

  At the end of the bracket 4 on the cancel cam side, a planar isosceles triangular guide protrusion 43 that protrudes toward the turn lever side and has inclined surfaces 430 and 431, and opens to the cancel cam side and the switch cover side and the moderation piece 11B. A recessed groove 44 is provided to hold the movably forward and backward.

(Configuration of ratchet 5)
As shown in FIGS. 1 and 2, the ratchet 5 has pivot pins 50 facing the respective end portions corresponding to the long holes 72 of the switch cover and the guide protrusions 43 of the bracket 4, and the cancel cam 2 and the bracket 4. Are arranged so as to be able to advance and retract in the directions of arrows C1 and C2 and to be rotatable in the directions of arrows D1 and D2. Then, in the neutral (OFF) state of the direction indicating switch (the state in which the turn lever 3 is disposed at the neutral position), the pivot pin 50 moves to the vicinity of the end portion of the long hole 72 and the apex portion of the guide protrusion 43. And the whole ratchet is arrange | positioned out of the rotation area | region 10 of the cam parts 20 and 20. As shown in FIG. Further, when the direction indicating switch is in a left turn instruction state (a state where the turn lever 3 is disposed at the left turn instruction rotation position) or a right turn instruction state (a state where the turn lever 3 is disposed at the right turn instruction rotation position), the pivot pin 50 moves to the cancel cam side end of the long hole 72 and the inclined surfaces 430 and 431 of the guide projection 43, and a part of the ratchet (end of the cancel cam side) is disposed in the rotation region 10 of the cam parts 20 and 20. ing. As the material of the ratchet 5, for example, the same material (POM resin or the like) as that of the bracket 4 is used.

  A canceling force receiving portion 51 that receives the rotational force (cancelling force or the like) of the cancel cam 2 from the cam portions 20 and 20 protrudes from the end portion of the ratchet 5 on the cancel cam side. The surface of the cancel cam side end portion of the ratchet 5 (the surface on the switch cover side) is positioned on the pivot pin side of the cancel force receiving portion 51 and is engaged with the other end portion of each of the ratchet return springs 8 and 9. Locking pins 52 and 53 for stopping are provided.

  A pair of rotational return force transmission portions 54 and 55 that transmit the rotational force (rotation power) of the cancel cam 2 to the moderation piece 11B are provided at the turn lever side end portion (bracket side end portion) of the ratchet 5. Yes. The rotation return force transmission surfaces of the rotation return force transmission portions 54 and 55 are formed as inclined surfaces that are gradually separated from the cancel cam side end portion toward the turn lever side end portion.

(Configuration of overload relief mechanism 6)
As shown in FIGS. 1 and 2, the overload relief mechanism 6 receives a rotational force from the ratchet 5 and transmits the rotational return force transmission member 6 </ b> A to the bracket 4 as a rotational return force, and the rotational return force transmission. The member 6 </ b> A includes a moderation piece 11 </ b> B and a concave groove 44 </ b> A that allows the member 6 </ b> A to escape from the cancel cam side to the turn lever side. And it is comprised so that the overload which 6A of rotation return force transmission members 6A received from the rotation return force transmission parts 54 and 55 of the ratchet 5 may be released.

  A part (the end portion on the switch cover side) of the rotation return force transmitting member 6A is exposed to the outside of the groove 44, and is provided integrally with the end portion on the turn lever side of the moderation piece 11B. And it is comprised so that it may advance and retreat along the ditch | groove 44 with the moderation piece 11B. Thereby, the rotation return force transmission member 6 </ b> A has a function of receiving the rotational force from the ratchet 5 and transmitting it to the bracket 4 and a function of releasing the overload from the ratchet 4. The groove 44 is formed by guide surfaces 440 and 441 that receive the rotation return force from the rotation return force transmission member 6A and guide the rotation return force transmission member 6A when the overload is released. A pressing spring 12 is mounted (accommodated) between the groove bottom of the concave groove 44 and the turn lever side end surface of the moderation piece 11B.

[Operation of the vehicle turn lever switch device 1]
First, "the turning operation of the turn lever to the left turn instruction turning position", "the turning return of the turn lever from the left turn instruction turning position (cancellation)" and "the left turn instructed to overload the ratchet The operation in the case will be described with reference to FIGS.

  FIG. 3 is a plan view for explaining the turning operation from the neutral position of the turn lever to the left turn instruction turning position in the vehicle turn lever switch device according to the embodiment of the present invention. 4 (a) and 4 (b) are plan views for explaining the canceling operation from the left turn instruction turning position of the turn lever to the neutral position in the vehicle turn lever switch device according to the embodiment of the present invention. is there. FIG. 4A shows the start state of the cancel operation, and FIG. 4B shows the end state of the cancel operation. FIG. 5 is a plan view for explaining a case where an overload is applied during a cancel operation from the left turn instruction rotation position of the turn lever to the neutral position in the vehicle turn lever switch device according to the embodiment of the present invention. is there.

  In the state where the turn lever 3 is disposed at the neutral position, the canceling force receiving portion 51 of the ratchet 5 is outside the rotating region 10 of the cam portions 20, 20, and the pivot pin 50 is the long hole 72. It is assumed that they are respectively arranged in the vicinity of the turn lever side end portion and the apex portion of the guide projection 43.

"Turn lever to turn to the left turn direction"
When the turn lever 3 shown in FIG. 2 is turned counterclockwise (arrow B1 direction) from the neutral position and placed at the left turn instruction turning position as shown in FIG. 3, the bracket 4 is moved in the same direction (arrow B1 direction). And the direction indicating switch is turned to the left turn indicating state, and the ratchet 5 advances from the bracket side to the cancel cam side (arrow C1 direction) and the cancel force receiving portion 51 rotates the cam portions 20 and 20. Arranged from outside the region 10 to within the rotation region 10. In this case, when the bracket 4 is rotated in the direction of the arrow B1, the pivot pin 50 is moved from the apex portion of the guide projection 43 to the inclined surface 430 and the turn lever of the long hole 72 by the elastic force of the ratchet return springs 8 and 9. Move from the side end to the cancel cam side end.

"Cancel operation from the turn position of the turn lever to turn left"
When the steering wheel is rotated clockwise (arrow A1 direction) as shown in FIG. 4A in the left turn instruction state of the direction indicating switch, the cancel cam 2 is rotated in the same direction (arrow A1 direction). The cam portions 20, 20 press the canceling force receiving portion 51 of the ratchet 5, and the ratchet 5 rotates counterclockwise (arrow D1 direction). When the ratchet 5 is further rotated in the direction of the arrow D1 by the rotation operation of the steering wheel (cancellation cam 2) in the direction of the arrow A1, the rotation return force transmitting portion 54 of the ratchet 5 is turned to the rotation return force transmitting member 6A of the bracket 4. Press. Then, as shown in FIG. 4B, the bracket 4 and the turn lever 3 are rotated clockwise (in the direction of the arrow B2) by the pressing of the rotation return force transmitting portion 54 to the rotation return force transmitting member 6A. The instruction switch is turned off, and the turn lever 3 is rotated and returned from the left turn instruction rotation position to the neutral position. In this case, when the bracket 4 rotates in the direction of arrow B2, the pivot pin 50 resists the elastic force of the ratchet return springs 8 and 9, and the apex portion from the inclined surface 430 of the guide projection 43 as shown in FIG. In addition, the long hole 72 moves from the end portion on the cancel cam side to the end portion on the turn lever side. As the pivot pin 50 moves, the ratchet 5 retracts in the direction of the arrow C2, and the cancel force receiving portion 51 is disposed from the rotation region 10 of the cam portions 20 and 20 to the outside of the rotation region 10.

"Operation when overload is applied to the ratchet in the left turn instruction state"
As shown in FIG. 5, in the left turn instruction state of the direction indicating switch, when the turn lever 3 is maintained in the left turn instruction rotation position and the steering wheel is rotated clockwise (cancellation direction), The cam 2 rotates clockwise to press the ratchet 5, and the ratchet 5 rotates counterclockwise by the pressing of the cancel cam 2.

  In this case, the turning force of the ratchet 5 is received by the turning return force transmission member 6A of the mechanism 6 due to the turning of the ratchet 5, and the turning force of the ratchet 5 is allowed against the elastic force of the pressing spring 12. Move in the direction of releasing the load (direction of arrow m). For this reason, the turning force of the ratchet 5 is not transmitted to the bracket 4 (turn lever 3), only the cancel cam 2 rotates clockwise and overcomes the cancel force receiving portion 51, and the turn lever 3 is turned to the left turn instruction rotation position. The state of being placed in is maintained.

  Next, overturning acts on the ratchet in the "turning operation of the turn lever to the right turn instruction turning position", "turning return (cancellation) operation of the turn lever from the right turn instruction turning position" and "right turn instruction state" The operation | movement at the time of having performed is demonstrated using FIG.2 and FIG.6-FIG.8.

  FIG. 6 is a plan view for explaining the turning operation from the neutral position of the turn lever to the right turn instruction turning position in the vehicle turn lever switch device according to the embodiment of the present invention. FIGS. 7A and 7B are plan views for explaining the canceling operation from the turn right turn instruction rotation position of the turn lever to the neutral position in the vehicle turn lever switch device according to the embodiment of the present invention. is there. 7A shows the start state of the cancel operation, and FIG. 7B shows the end state of the cancel operation. FIG. 8 is a plan view for explaining a case where an overload is applied during a cancel operation from the turn right turn instruction rotation position of the turn lever to the neutral position in the vehicle turn lever switch device according to the embodiment of the present invention. is there.

  In the state where the turn lever 3 is disposed at the neutral position, the canceling force receiving portion 51 of the ratchet 5 is outside the rotating region 10 of the cam portions 20, 20, and the pivot pin 50 is the long hole 72. It is assumed that they are respectively arranged in the vicinity of the turn lever side end portion and the apex portion of the guide projection 43.

"Turn lever to turn right turn command"
When the turn lever 3 shown in FIG. 2 is turned clockwise from the neutral position (in the direction of arrow B2) and placed in the right turn instruction turning position as shown in FIG. 6, the bracket 4 is in the same direction (in the direction of arrow B2). The turn direction switch is turned to the right turn instruction state, and the ratchet 5 advances from the bracket side to the cancel cam side (in the direction of the arrow C1) so that the cancel force receiving portion 51 is a rotation region of the cam portions 20 and 20. 10 is arranged in the rotation area 10 from the outside. In this case, when the bracket 4 is rotated in the direction of the arrow B2, the pivot pin 50 is moved from the apex of the guide projection 43 to the inclined surface 431 by the elastic force of the ratchet return springs 8 and 9, and the turn lever of the long hole 72 is turned. Move from the side end to the cancel cam side end.

"Cancel operation from turn lever right turn instruction rotation position"
When the steering wheel is turned counterclockwise (arrow A2 direction) as shown in FIG. 7A in the right turn instruction state of the direction indicating switch, the cancel cam 2 is turned in the same direction (arrow A2 direction). Thus, the cam portions 20, 20 press the canceling force receiving portion 51 of the ratchet 5, and the ratchet 5 rotates clockwise (arrow D <b> 2 direction). When the ratchet 5 is further rotated in the direction of arrow D2 by the rotation operation of the steering wheel (cancellation cam 2) in the direction of arrow A2, the rotation return force transmitting portion 55 of the ratchet 5 is turned to the rotation return force transmitting member 6A of the bracket 4. Press. Then, as shown in FIG. 7B, the bracket 4 and the turn lever 3 are rotated counterclockwise (arrow B1 direction) by the pressing of the rotation return force transmission portion 55 to the rotation return force transmission member 6A. The direction indicating switch is turned off, and the turn lever 3 is rotated back from the right turn indicating rotation position to the neutral position. In this case, when the bracket 4 is rotated in the direction of the arrow B1, the pivot pin 50 resists the elastic force of the ratchet return springs 8 and 9, and the apex portion from the inclined surface 440 of the guide projection 43 as shown in FIG. In addition, the long hole 72 moves from the end portion on the cancel cam side to the end portion on the turn lever side. As the pivot pin 50 moves, the ratchet 5 retracts in the direction of the arrow C2, and the cancel force receiving portion 51 is disposed from the rotation region 10 of the cam portions 20 and 20 to the outside of the rotation region 10.

“Operation when an overload is applied to the ratchet in the right turn instruction state”
As shown in FIG. 8, in the right turn instruction state of the direction indication switch, when the turn lever 3 is maintained in the right turn instruction rotation position and the steering wheel is turned counterclockwise (cancellation direction), The cancel cam 2 rotates counterclockwise and presses the ratchet 5, and the ratchet 5 rotates clockwise when the cancel cam 2 is pressed.

  In this case, the turning force of the ratchet 5 is received by the turning return force transmission member 6A of the mechanism 6 due to the turning of the ratchet 5, and the turning force of the ratchet 5 is allowed against the elastic force of the pressing spring 12. Move in the direction of releasing the load (direction of arrow m). For this reason, the rotational force of the ratchet 5 is not transmitted to the bracket 4 (turn lever 3), only the cancel cam 2 rotates counterclockwise, gets over the cancel cam receiving portion 51, and turns the turn lever 3 to turn right. The state of being placed at the position is maintained.

[Effect of the embodiment]
According to the embodiment described above, the following effects can be obtained.

  A moderation piece 11B for the rotation return force transmission member 6A of the overload relief mechanism 6 to selectively arrange the turn lever 3 at any one of the neutral position and the left turn instruction rotation position or the right turn instruction rotation position. Therefore, the moving back plate and the return spring which are conventionally required are not necessary. As a result, the number of parts can be reduced and the cost can be reduced.

  As mentioned above, although the vehicle turn lever switch apparatus of this invention was demonstrated based on said embodiment, this invention is not limited to said embodiment, In the range which does not deviate from the summary, it is various aspects. For example, the following modifications are possible.

(1) In the present embodiment, the case where the ratchet 5 is given the return habit by the pair of ratchet return springs 8 and 9 has been described, but the present invention is not limited to this, and the single ratchet return is performed. A return habit may be imparted to the ratchet by a spring for use. In this case, on the back surface of the ratchet cancel cam side end portion, there is provided a spring spanning portion for spanning the ratchet return spring. Thereby, compared with the case of this Embodiment, a number of parts can further be reduced.

(2) In the present embodiment, the case where a plastic material such as POM resin is used as the material of the bracket 4 and the ratchet 5 has been described, but the present invention is not limited to this, and other plastic materials or plastic materials other than the plastic material are used. Of course, it may be a material.

The exploded perspective view shown in order to demonstrate the whole turn lever switch device for vehicles concerning an embodiment of the invention. The top view shown in order to demonstrate the whole vehicle turn lever switch apparatus concerning embodiment of this invention. The top view shown in order to demonstrate the rotation operation | movement from the neutral position of the turn lever to the left turn instruction | indication rotation position in the turn lever switch apparatus for vehicles which concerns on embodiment of this invention. (A) And (b) is a top view shown in order to demonstrate the cancellation operation from the left turn instruction | indication rotation position of the turn lever in the vehicle turn lever switch apparatus concerning embodiment of this invention to a neutral position. The top view shown in order to demonstrate the case where an overload acts at the time of the cancellation operation from the left turn instruction | indication rotation position of the turn lever to the neutral position in the turn lever switch apparatus for vehicles which concerns on embodiment of this invention. The top view shown in order to demonstrate the rotation operation | movement from the neutral position of the turn lever to the right turn instruction | indication rotation position in the turn lever switch apparatus for vehicles which concerns on embodiment of this invention. (A) And (b) is a top view shown in order to demonstrate the cancellation operation from the right turn directions rotation position of the turn lever to the neutral position in the turn lever switch device for vehicles concerning an embodiment of the invention. The top view shown in order to demonstrate the case where an overload acts at the time of the cancellation operation | movement from the right turn instruction | indication rotation position of the turn lever to the neutral position in the turn lever switch apparatus for vehicles which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle turn lever switch apparatus 2 ... Cancel cam, 20 ... Cam part, 21 ... Cam attaching part 3 ... Turn lever 4 ... Bracket, 40 ... Pivot pin, 43 ... Guide protrusion, 430, 431 ... Inclined surface, 44 ... concave groove, 440, 441 ... guide surface 5 ... ratchet, 50 ... pivot pin, 51 ... canceling force receiving part, 52, 53 ... locking pin, 54, 55 ... rotating return force transmitting part 6 ... overload relief Mechanism, 6A ... Rotation return force transmitting member 7 ... Base, 70, 71 ... Locking pin, 72 ... Long hole 8, 9 ... Ratchet return spring 10 ... Rotation region 11 ... Moderation mechanism, 11A ... Moderation surface, 11B ... Moderation piece 12 ... Pressing spring

Claims (3)

In a vehicle turn lever switch device including a turn lever for operating a direction indicating switch that can be rotated and returned from a left turn instruction turning position or a right turn instruction turning position to a neutral position by rotation of a steering shaft,
A cancel cam that rotates with the steering shaft;
A bracket rotatably disposed in a plane of rotation of the cancel cam, and connected to the turn lever;
A ratchet that is disposed between the bracket and the cancel cam so as to be movable forward and backward, and that rotates by receiving the rotational force of the cancel cam;
A rotation return force transmission member that receives turning force from the ratchet and transmits the rotation return force to the bracket, and includes an overload release mechanism that releases an overload received by the rotation return force transmission member;
The overload release mechanism is arranged such that the rotation return force transmission member can be moved forward and backward with respect to the bracket, and the turn lever is moved to any one of the neutral position, the left turn instruction rotation position, and the right turn instruction rotation position. A turn lever switch device for a vehicle, wherein the vehicle turn lever switch device is provided integrally with a moderation piece for selective placement at a position.   2. The vehicle turn lever switch device according to claim 1, wherein the ratchet includes a pair of rotation return force transmission portions that transmit a rotation force of the cancel cam to the rotation return force transmission member.   The turn lever switch device for a vehicle according to claim 1, wherein the ratchet is given a return habit by a single spring.

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