JP2007153213A - Vehicular turn signal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable an engaged portion to be integrated with a bracket while having a disengaging function, and to save cost. <P>SOLUTION: When a cancel cam 1 is rotated in the opposite direction to an indicated direction while a turn lever 7 is held and the bracket 5 is fixed at a left turning indicated position, a rachet 27 shaken by a cam projecting portion 2 of the cancel cam 1 rotates in an arrow G direction along a disengaging cam portion 33 provided on a cover about an engaging position 35 engaged with the engaged portion 23. Therefore, passing of the cam projecting portion 2 is permitted. At the time of such disengagement, the engaged portions 23, 24 need not move to the bracket 5, so that the engaged portions 23, 24 can be integrated with the bracket 5. A back plate and an expensive spring with a large load holding the back plate at a middle position which are conventionally needed are also unnecessary. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicular direction indicating device having a self-cancelling mechanism, and in particular, in a state where a bracket is fixed at a left turn instructing position or a right turn instructing position, a cancel cam is rotated in a direction opposite to the instructed direction. In particular, the present invention relates to a vehicular direction indicating device having a so-called biting escape function in which a ratchet escapes to allow rotation of a cancel cam.

  This type of vehicle direction indicating device is provided with the following configuration. In the state where the turn lever and the bracket are positioned at the neutral position, the ratchet of the cancel mechanism is urged to the cancel cam side by the ratchet spring, and the end portion of the ratchet opposite to the cancel cam is the back plate provided on the bracket. It is located between two engaged parts for cancellation. The bracket is held at a neutral position by a moderation mechanism, and the back plate is held at an intermediate position by a back spring. When the bracket is rotated to, for example, the left turn instruction position by operating the turn lever from the state where the bracket is positioned at the neutral position, the end portion on the cancel cam side of the ratchet enters the rotation locus of the cam convex portion of the cancel cam. It becomes a state. At this time, the anti-cancellation cam side end portion of the ratchet is in a state of being close to one of the two engaged portions for cancellation.

  When the steering wheel is rotated in the left direction (forward direction), which is the same as the direction indicated by the turn lever, and the cancel cam is rotated in the left direction, the cam convex portion of the cancel cam is ratcheted. The ratchet is shaken (turned) while coming into contact with the end portion of the cancel cam from one side. In this case, the ratchet is allowed to pass the cam convex portion by swinging in the direction in which the end portion on the side opposite to the cancel cam side is separated from the close engaged portion, and the bracket is moved to the left turn instruction position. Retained.

  On the other hand, when the steering wheel is rotated in the right direction opposite to the direction indicated by the turn lever and the cancel cam is rotated in the right direction, the cam convex portion of the cancel cam is the end portion on the cancel cam side of the ratchet. The ratchet is swung in the direction opposite to that described above. In this case, the ratchet is rotated in a direction in which the end portion on the side opposite to the cancel cam is engaged with the engaged portion adjacent to the ratchet, so that the bracket and the turn lever are turned to the left turn instruction position via the engaged portion. Is rotated in the neutral position direction and returned to the neutral position.

  Further, in the left turn-in state, the turn lever is held by the user and the bracket is fixed at the left turn position, and the steering wheel is rotated in the right direction opposite to the direction indicated by the turn lever, so that the cancel cam Is rotated in the right direction, the back-plate having the engaged portion is attached to the back spring after the non-cancelling cam side end of the ratchet swung by the cam convex portion is engaged with the engaged portion. By sliding from the intermediate position against the force, the ratchet is allowed to rotate, and the cam projection of the cancel cam is allowed to pass. Such an operation is called a bite-and-escape function and can prevent parts such as ratchets and brackets from being destroyed.

Although the above description is about the case where the bracket is turned to the left turn instruction position, when the bracket is turned to the right turn instruction position, only the turning direction of each member is reversed. The basic operation is the same as described above. An apparatus having this type of configuration is disclosed in Patent Document 1, for example.
JP 2005-035398 A

  However, in the structure described above, in order to obtain a biting escape function, it is necessary to manufacture the back plate having the engaged portion as a separate part from the bracket. Further, in order to hold the back plate at the intermediate position, an expensive spring having a large load is required, which in turn has a disadvantage that the cost is increased.

  The present invention has been made in view of the above-described circumstances, and the object thereof is to provide a bite-and-escape function, while allowing the engaged portion to be integrated with the bracket and reducing the cost. An object of the present invention is to provide a vehicular direction indicating device that can be reduced.

In order to achieve the above-described object, a vehicle direction indicating device of the present invention is provided with a cancel cam having a cam convex portion and rotated by a steering wheel, and rotatably provided on the body in the vicinity of the cancel cam. A bracket that rotates between a neutral position, a left turn instruction position, and a right turn instruction position together with the turn lever, two engaged portions for cancellation provided in a fixed state on the bracket, and a shaft portion It is provided so as to be able to rotate and move in the direction of approaching and separating from the cancel cam, and the opposite end portion of the counter-cancel cam that is opposite to the cancel cam is located between the two engaged portions. And a ratchet in which the end portion on the cancel cam side enters the rotation locus of the cam convex portion of the cancel cam as the bracket is turned to the left or right turn instruction position. A cover provided so as to cover the ratchet from above, and when the cancel cam is rotated in the same direction as the indicated direction in a state where the bracket is turned to the left or right turn indicating position. The ratchet is moved away from the opposite engaged portion of the two engaged portions when the cancel cam side end portion of the ratchet is swung by the cam convex portion. When the cancel cam is rotated in a direction opposite to the indicated direction, the ratchet is moved to the cancel cam side end portion by the cam convex portion. In connection with swinging, the anti-cancellation cam side end is engaged with the adjacent engaged portion to return the bracket to the neutral position.
When the cancel cam is rotated in a direction opposite to the direction in which the bracket is fixed to the cover at the left or right turn indicating position, the end portion of the ratchet on the cancel cam side is the cam. An anti-cancellation cam side end that is swung by a convex portion engages with the engaged portion, and the ratchet can rotate with the engagement point as a fulcrum. It is characterized in that the cam projection is allowed to pass along with the movement.

  In the present invention, when the turn lever bites when the cancel cam is rotated in the opposite direction to the direction in which the turn lever is held and the bracket is fixed at the left or right turn indicating position, The ratchet swung by the cam convex portion of the cancel cam rotates along the biting escape cam portion provided on the cover with the engagement point engaged with the engaged portion as a fulcrum. The passage of the part is allowed. Accordingly, since the engaged portion does not need to move with respect to the bracket at the time of biting and escaping, the engaged portion can be integrated with the bracket. For this reason, the conventionally required back plate is not required. Further, since an expensive spring with a large load that holds the back plate in an intermediate position is not required, the cost can be reduced.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
First, in FIG. 1, the cancel cam 1 has a cancel cam projection 2 on the outer peripheral portion, and is rotated integrally with a steering wheel (not shown). In the vicinity of the right side of the cancel cam 1, the body 3 is provided in a fixed state. A cover 4 is mounted on the upper surface of the body 3 as shown in FIG. A bracket 5 is disposed in the body 3. The bracket 5 is provided so as to be rotatable in the directions of arrows A1 and A2 in FIG. The base end portion of the turn lever 7 is inserted into the bracket 5. The turn lever 7 is connected to the bracket 5 by a shaft portion 8, and is provided so as to be rotatable together with the bracket 5 about the shaft portion 6 in the arrow A1 direction and the arrow A2 direction. The shaft 8 is provided so as to be rotatable in the directions of arrows B1 and B2 in FIG. 2 intersecting the arrows A1 and A2.

  An accommodation hole 9 having an opening at the distal end side is formed at the distal end portion of the bracket 5, and a moderation piece 10 and a moderation spring 11 for urging the moderation piece 10 outward are provided in the accommodation hole 9. ing. In the body 3, a moderation surface portion 12 is provided at a portion facing the tip portion of the bracket 5, and the moderation piece 10 is slidably in contact with the moderation surface portion 12. Here, the moderation piece 10, the moderation spring 11, and the moderation surface portion 12 constitute a moderation mechanism 13 in the directions of arrows A 1 and A 2 of the bracket 5. As is well known, the moderation mechanism 13 is configured to selectively hold the bracket 5 at a neutral position shown in FIGS. 1 and 2, a left turn instruction position shown in FIG. 4, and a right turn instruction position (not shown). ing.

  A receiving hole 14 whose front end is opened is also formed at the base end portion of the turn lever 7 inserted in the bracket 5, and the moderation piece 15 and the moderation piece 15 are urged outward in the receiving hole 14. A moderation spring 16 is provided. In the bracket 5, a moderation surface portion 17 is provided in a portion of the turn lever 7 facing the accommodation hole 14, and the moderation piece 15 is slidably in contact with the moderation surface portion 17. Here, the moderation piece 15, the moderation spring 16, and the moderation surface portion 17 constitute a moderation mechanism 18 in the directions of arrows B 1 and B 2 of the turn lever 7.

  A turn signal switch 19 whose state is changed in conjunction with the rotation of the bracket 5 in the directions of arrows A1 and A2 is provided at the bottom of the body 3, and the arrows B1 and B2 of the turn lever 7 are provided. A dimmer passing switch 20 whose state is changed in conjunction with the rotation in the direction is provided.

  On the upper surface of the bracket 5, two engaged portions 23 and 24 for cancellation are provided integrally with the bracket 5. These two engaged portions 23 and 24 protrude upward and are arranged in a C shape when viewed from the cancel cam 1 side. Further, a guide convex portion 25 (see FIGS. 4 and 5) having a mountain shape is formed on the tip end side (cancellation cam 1 side) of the upper surface portion of the bracket 5, and around the guide convex portion 25. A recess 26 that is lower than the guide protrusion 25 is formed.

  A ratchet 27 is disposed on the front end side of the upper surface of the bracket 5, and this ratchet 27 is covered from above by the cover 4. The ratchet 27 is provided with a shaft portion 28 that protrudes downward substantially at the lower portion of the center portion, and is positioned above the shaft portion 28 so that a moderation piece 29 made of a steel ball and the moderation piece 29 are connected to each other. A moderation spring 30 that biases upward is provided. The downward shaft portion 28 is inserted into the concave portion 26, and the moderation piece 29 is movably inserted into the guide groove 31 formed on the inner surface of the cover 4. The guide groove 31 extends in a direction along a line connecting the center of the shaft portion 6 that is the rotation center of the bracket 5 and the rotation center of the cancel cam 1. A ratchet spring 32 is hooked on the ratchet 27, and the ratchet 27 is biased in the direction in which the cancel cam side end portion 27 a approaches the cancel cam 1 (in the direction of arrow C in FIG. 1) by the biasing force of the ratchet spring 32. Has been.

  Here, the ratchet 27 is provided so as to be able to rotate around the shaft portion 28 and to move in a direction approaching and separating from the cancel cam 1. In the ratchet 27, the opposite cancel cam side end portion 27 b opposite to the cancel cam 1 is positioned between the two engaged portions 23 and 24. On the inner surface of the cover 4, biting escape cam portions 33 are provided on both the left and right sides of the guide groove 31. As shown in FIG. 3, the biting escape cam portion 33 is formed as an inclined surface with a height on the guide groove 31 side.

Next, the operation of the above configuration will be described.
In the state in which the turn lever 7 and the bracket 5 are positioned at the neutral position shown in FIGS. 1 and 2, the shaft portion 28 of the ratchet 27 faces the tip end portion of the guide convex portion 25 in the concave portion 26, and the ratchet 27 The displacement is displaced in the direction away from the cancel cam 1 (the direction opposite to the arrow C) against the urging force of the ratchet spring 32. In this state, the cancel cam side end portion 27 a is located outside the rotation locus D of the cam convex portion 2 in the cancel cam 1. Further, the non-cancellation cam side end portion 27 b of the ratchet 27 is located at a substantially central portion between the two engaged portions 23 and 24.

  When the turn lever 7 is rotated in the direction of the arrow A1, which is a left turn instruction direction, for example, from the neutral position, the bracket 5 is rotated together with the turn lever 7 in the direction of the arrow A1 about the shaft portion 6. It will be in the state rotated to the left turn instruction | indication position of FIG. Then, the shaft portion 28 of the ratchet 27 is disengaged from the tip of the guide convex portion 25 and moves to the skirt side along the slope of the guide convex portion 25, and is moved and displaced in the direction of arrow C by the urging force of the ratchet spring 32. The cancel cam side end portion 27a of the ratchet 27 enters the rotation locus D of the cam projection 2 of the cancel cam 1. At this time, the non-cancellation cam side end portion 27 b of the ratchet 27 is in a state of being close to the one engaged portion 23. Further, the turn signal switch 19 is turned on for the left turn.

  In this left turn instruction position input state, the cancel cam 1 is rotated in the same left direction (arrow E1 direction) (forward direction) as the instruction direction of the turn lever 7 by a steering wheel (not shown), and the cam projection 2 is ratchet 27. When the ratchet 27 comes into contact with the cancel cam side end portion 27a from the direction of the arrow E1, the anti-cancellation cam side end portion 27b moves away from the adjacent engaged portion 23 with the shaft portion 28 and the moderation piece 29 as the center. It rotates so as to be swung in the direction (arrow F1 direction), and the cam protrusion 2 is allowed to pass in the arrow E1 direction. When the cam projection 2 passes in the direction of arrow E1, the ratchet 27 is returned to the direction of arrow F2 opposite to the arrow F1 by the elastic force of the ratchet spring 32. In this case, the bracket 5 and the turn lever 7 remain held at the left turn instruction position.

  On the other hand, the cancel cam 1 is rotated by the steering wheel in the right direction (in the direction of arrow E2) opposite to the direction indicated by the turn lever 7 with the left turn instruction position shown in FIG. When contacting the cancel cam side end portion 27a of the ratchet 27 from the direction of the arrow E2, the ratchet 27 has the shaft portion 28 and the moderation piece 29 as the center, and the anti-cancellation cam side end portion 27b is in contact with the engaged portion 23 that is close. It is turned and displaced so as to be swung in the direction of the arrow F2 to be engaged. With the rotation of the ratchet 27 in the arrow F2 direction, the counter cancel cam side end portion 27b engages with the engaged portion 23, and a rotational force that rotates the bracket 5 in the arrow A2 direction acts. As a result, the bracket 5 and the turn lever 7 are rotated in the direction of the arrow A2 and returned to the neutral position in FIG. 1, thereby performing a self-cancelling operation. Accordingly, the left turn switch of the turn signal switch 19 is turned off.

  Next, the turn lever 7 is held by the driver so as not to rotate and return in the direction of the arrow A2 in the input state of the left turn instruction position in FIG. 4, and the cancel cam 1 is instructed by the steering wheel in this state. When the cam convex portion 2 comes into contact with the cancel cam side end portion 27a of the ratchet 27 from the direction of the arrow E2 The ratchet 27 is pivotally displaced about the shaft portion 28 and the moderation piece 29 so that the anti-cancellation cam side end portion 27b is swung in the direction of the arrow F2 that engages the adjacent engaged portion 23. The cancel cam side end portion 27b engages with the engaged portion 23, and a rotational force that rotates the bracket 5 in the direction of arrow A2 acts.

  However, in this case, since the turn lever 7 and the bracket 5 are prevented from rotating in the direction of the arrow A2, the turn lever 7 and the bracket 5 are not rotated in the direction of the arrow A2, and as shown in FIG. In addition, the ratchet 27 rotates in the direction of the arrow G with the engagement point 35 between the anti-cancellation cam side end portion 27b and the engaged portion 23 as a fulcrum. Then, the moderation piece 29 comes off the guide groove 31 and slides on one biting escape cam portion 33 (see FIG. 6). Thus, as the ratchet 27 rotates in the direction of arrow G with the engagement point 35 as a fulcrum, the cam protrusion 2 is allowed to pass in the direction of arrow E2. When the cam convex portion 2 passes in the direction of arrow E2, the moderation piece 29 of the ratchet 27 slides on the inclined surface of the biting escape cam portion 33 and fits into the guide groove 31, and the ratchet 27 The ratchet 27 returns to its original state by rotating in the opposite direction to G. The above operation is the operation of the biting escape function.

  The above description is about the case where the turn lever 7 is turned in the direction of the left turn instruction position. However, when the turn lever 7 is turned in the direction of the right turn instruction position, the turning direction of each member is changed. Since the basic operation is the same as above only in the reverse direction, the description is omitted.

  According to the above-described embodiment, the following operational effects can be obtained. That is, when the turn lever 7 is bitten when the cancel cam 1 is rotated in the direction opposite to the direction in which the turn lever 7 is held and the bracket 5 is fixed at the left turn or right turn instruction position. The ratchet 27 swung by the cam convex portion 2 of the cancel cam 1 has a biting escape cam portion provided on the cover 4 with an engagement point 35 engaged with the adjacent engaged portion 23 or 24 as a fulcrum. By rotating along 33, the passage of the cam projection 2 is allowed. Therefore, it is not necessary for the engaged portions 23 and 24 to move with respect to the bracket 5 at the time of bite and escape, so that the engaged portions 23 and 24 can be integrated with the bracket 5. For this reason, the conventionally required back plate is not required. Further, since an expensive spring with a large load that holds the back plate in an intermediate position is not required, the cost can be reduced.

  Further, the ratchet 27 is provided with a moderation piece 29 that slides on the biting escape cam portion 33 and a moderation spring 30 that biases the moderation piece 29 toward the cover 4, so that the ratchet 27 can be rotated. Can be smooth. Since the biting escape cam portion 33 has a slope inclined toward the guide groove 31, the moderation piece 29 can be automatically returned to the guide groove 31 after the cam convex portion 2 has passed.

The top view which shows one Embodiment of this invention and shows the state which has a bracket in a neutral position in the state which removed the cover Longitudinal side view The expanded sectional view of the principal part corresponded to the part along the X3-X3 line of FIG. A plan view showing a state in which the bracket is inserted into the left turn instruction position with the cover removed. A plan view showing the bite escape function with the cover removed The expanded sectional view of the principal part corresponded to the part along the X6-X6 line of FIG.

Explanation of symbols

In the drawings, 1 is a cancel cam, 2 is a cam projection, 3 is a body, 4 is a cover, 5 is a bracket, 7 is a turn lever, 13 is a moderation mechanism, 19 is a turn signal switch, and 23 and 24 are engaged parts. , 25 is a guide convex part, 27 is a ratchet, 27a is a cancel cam side end part, 27b is an anti-cancel cam side end part, 28 is a shaft part, 29 is a moderation piece, 30 is a moderation spring, 31 is a guide groove, 32 is A ratchet spring, 33 is a biting cam portion for escaping, 35 is an engagement point, and D is a rotation locus of the cam convex portion.

Claims (2)

A cancel cam having a cam projection and rotated by a steering wheel;
A bracket that is rotatably provided on the body in the vicinity of the cancel cam, and that is rotated together with the turn lever between a neutral position, a left turn instruction position, and a right turn instruction position;
Two engaged parts for cancellation provided in a fixed state on the bracket;
It is provided so as to be rotatable about a shaft portion and movable in a direction approaching and separating from the cancel cam, and the opposite cancel cam side end portion of the cancel cam is the two engaged parts. A ratchet that is located between the portions, and that the end portion on the cancel cam side enters the rotation locus of the cam convex portion of the cancel cam as the bracket is turned to the left or right turn instruction position;
A cover provided to cover the ratchet from above,
When the cancel cam is rotated in the same direction as the indicated direction by the steering wheel in a state where the bracket is turned to the left turn or right turn instruction position, the ratchet is moved to the end of the cancel cam. As the portion is swung by the cam convex portion, the anti-cancellation side end portion is separated from the adjacent engaged portion of the two engaged portions, thereby allowing the cam convex portion to pass. When the cancel cam is rotated in the direction opposite to the indicated direction, the ratchet is moved to the opposite end portion of the anti-cancel cam as the cancel cam side end portion thereof is shaken by the cam convex portion. In the vehicular direction indicating device in which the bracket is rotated and returned to the neutral position by engaging the adjacent engaged portion,
When the cancel cam is rotated in a direction opposite to the indicated direction by the steering wheel in a state where the bracket is fixed to the left turn or right turn instruction position on the cover, the end of the ratchet on the cancel cam side A cam portion for biting and escaping that allows the ratchet to turn with the engagement point as a fulcrum, with the anti-cancellation cam side end engaged with the engaged portion, and the ratchet portion is swung by the cam convex portion; A vehicular direction indicating device characterized in that the cam projection is allowed to pass along with the rotation of the ratchet. 2. The vehicle direction indicating device according to claim 1, wherein the ratchet is provided with a moderation piece that slides on the biting escape cam portion and a moderation spring that biases the moderation piece toward the cover.

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