JPH0659807B2 - Turn signal cancellation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention relates to an automatic lever operated by rotating a steering wheel in the opposite direction to indicate a turning direction of a vehicle. The present invention relates to a turn signal canceling device that is automatically returned to a neutral position.

(Prior Art) A conventional turn signal canceling device is provided with a cam cylinder having two cams concentrically with a steering shaft and a turn signal switch mechanism operated by an operating lever. The ratchet part was moved to the cancel position by rotating the operation lever of the turn signal switch mechanism part from the neutral position to the right turning direction position or the left turning direction position, and the steering wheel was rotated in the turning direction of the operation lever more than a certain amount. The cam portion of the cam cylinder rotated by the steering wheel when rotated in the opposite direction to the rear is brought into contact with the ratchet portion in the cancel position to return the operation lever to the neutral position. As the turn signal switch mechanism portion, a fork-shaped bracket which is rotated by the operation lever so as to surround the cam cylinder is provided, and two ends for the right turn and the left turn are provided at both ends of the bracket. There are two types, one having a ratchet portion and one having a single ratchet portion on the same side as the operating lever.

(Problems to be Solved by the Invention) In the configuration provided with the two ratchet portions, the cancel ready angle [the cancel ready angle is the right (left) position of the operation lever of the turn signal switch mechanism from the neutral position. When the steering wheel is rotated to the right (left) folding direction while the ratchet portion is moved to the cancel position by rotating the ratchet portion to the folding direction position, the cam portion until the cam portion passes through the ratchet portion at the cancel position. When the steering wheel is rotated in the left (right) folding direction from this position at an angle, the cam portion immediately engages with the ratchet portion and the operation lever is returned to the neutral position. ] And the reverse cancel angle [The reverse cancel angle is the steering wheel when the operation lever of the turn signal switch mechanism is rotated from the neutral position to the right (left) folding direction position to move the ratchet part to the cancel position. The angle at which the cam engages the ratchet at the cancel position and the operating lever returns to the neutral position when the wheel is rotated left (right). ] And can be set independently by the positions of the two ratchet parts, and normally the cancel preparation angle is set to around 80 degrees, and the reverse cancellation angle is set to 120 degrees or more, which is larger than the cancellation preparation angle. ing. However, in the turn signal switch mechanism portion of this configuration, since the bracket and the ratchet portion are provided so as to surround the cam cylinder body, that is, the steering shaft, when repairing the turn signal switch mechanism portion, the steering wheel is If it is not removed, the turn signal switch mechanism cannot be removed, which makes repairing difficult.

On the other hand, in the case of the structure provided with one ratchet part, when the turn signal switch mechanism part is repaired, it is not necessary to remove the steering wheel, and the work can be easily performed. However, since there is only one ratchet part, it is not possible to set the cancel ready angle and the reverse cancel angle independently, and when the cancel ready angle is set to around 80 degrees, the reverse cancel angle is inevitable. Similarly, it will be set to around 80 degrees. Therefore, in a large vehicle or the like, after turning the operation lever to the right turn direction position, for example,
When the steering wheel is rotated counterclockwise to correct the position of the vehicle to the left, the operation lever returns to the neutral position by a slight rotation of about 80 degrees, and the operation lever must be rotated to the right turn direction position again. There is a problem that it does not become.

Therefore, it is an object of the present invention to provide a turn signal canceling device in which the reverse cancel angle can be set to be larger than the cancel preparation angle, and even in this case, the mechanical portion can be easily disassembled and repaired.

[Structure of the Invention] (Means for Solving the Problems) A cancel device for a turn signal according to the present invention is a cam cylinder member rotated by a steering wheel and having two cancel protrusions on its outer peripheral portion, and a neutral position by an operating lever. To the right turn direction position and the left turn direction position, and has one ratchet portion which is moved to the cancel position in response to the operation, and the cam cylinder member is rotated in the operation direction of the operation lever. Sometimes the ratchet portion swings to allow passage of the cancel protrusion, and when the ratchet portion is rotated in a direction opposite to the operating direction, the ratchet portion engages with the cancel protrusion and performs a cancel operation. The ratchet portion side surface of the two canceling protrusions of the cam cylinder member, the cam cylinder member of the operation lever It has a feature where the cancel protrusion encounters the ratchet part and the first is provided with a cancellation prohibiting projection to retract the ratchet portion so as to be incapable engagement when it is rotated to create a direction opposite direction.

(Operation) According to the turn signal cancel device of the present invention, when the operation lever is rotated from the neutral position to the right turn direction position or the left turn direction position, the ratchet portion is moved to the cancel position. Then, when the steering wheel is rotated in the clockwise or counterclockwise direction, one of the cancel prohibiting projections of the cam cylinder member comes into contact with the ratchet portion and retracts the ratchet portion, so that the canceling projection becomes unengageable. Then, when the cancel protrusion passes the ratchet part, the ratchet part is moved to the cancel position again. When the steering wheel is rotated leftward or rightward from this position, one canceling protrusion of the cam cylinder member engages with the ratchet portion and the operating lever is returned to the neutral position.
Therefore, the cancel preparation angle is an angle until the cancel-inhibiting protrusion on the side of one canceling protrusion gets over the ratchet portion.

Next, when the steering lever is rotated from the neutral position to the right turning direction position or the left turning direction position to move the ratchet portion to the cancel position, and then the steering wheel is rotated leftward or rightward, the cam cylinder member is rotated. The other cancel-inhibiting protrusion comes into contact with the ratchet portion and is retracted, so that the other canceling protrusion first encountered cannot be engaged.
Then, when the other canceling protrusion passes the ratchet part, the ratchet part is moved to the cancel position again. When the steering wheel is rotated clockwise or counterclockwise from this position, the other canceling protrusion of the cam cylinder member comes into contact with the ratchet portion, and the ratchet portion passes while swinging the ratchet portion. When the steering wheel is further rotated in the clockwise or counterclockwise direction, one of the cancel prohibiting protrusions of the cam cylinder member comes into contact with the ratchet portion and retracts the ratchet portion. Then, when the cancel protrusion passes the ratchet part, the ratchet part is moved to the cancel position again. When the steering wheel is rotated leftward or rightward from this position, one canceling protrusion of the cam cylinder member engages with the ratchet portion and the operating lever is returned to the neutral position. Therefore, the reverse cancel angle is an angle until the cancel-inhibiting protrusion on the side of the other canceling protrusion crosses over the ratchet part and one canceling protrusion engages with the ratchet part.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 9.

In FIGS. 1 and 2, reference numeral 1 is a switch body, and a steering shaft 2 penetrates through a circular cylindrical portion 1a formed in a central portion. 3 is the first of the switch body 1
In the wiper switch unit provided on the left side in the figure, a wiper switch (not shown) therein is operated by an operation lever 3a to turn off (OFF) and intermittent (IN).
T), low speed (LO), high speed (HI). Reference numeral 4 is a turn signal switch unit, which is a mechanism portion provided on the right side of the switch body 1 in FIG. 1, and 5 is an operation lever rotatably attached to the right end portion of the turn signal switch unit 4. 5 is a right turn direction position (R) and a left turn direction position (L) from the neutral position (N)
To be operated. 6 is a turn signal switch unit 4
One ratchet portion provided at the left end of the cylinder portion 1a side, which is rotatable about the shaft 6a through the long hole 4a and movable in the cylinder portion 1a direction. When 5 is operated from the neutral position (N) to the right turn direction position (R) or the left turn direction position (L), the neutral position is accordingly moved from the neutral position to the cancel position indicated by the chain double-dashed line. Fourth
As shown in the figure, 7 is a circular cam cylinder member that is rotatably mounted on the outer periphery of the cylinder portion 1a of the switch body 1 and is swingable in the axial direction. Engaging claw 1
The pin 8 that is engaged with the steering wheel 9b in a retaining state and that is projectingly provided on the upper surface portion of the upper end flange portion 7a is fitted into the hole portion 9a of the steering wheel 9 so that the steering wheel 9
2 and is always urged upward by the spring 10 interposed between the lower end and the switch body 1 as shown in FIG.

Now, 11 and 12 are canceling projections, which are provided on the outer peripheral portion of the cam cylinder member 7 so as to project symmetrically from the center thereof. Reference numerals 13 and 14 denote cancel-inhibiting protrusions, which are integrally formed on the surface portions of the cancel protrusions 11 and 12 on the ratchet portion 6 side so as to be continuous with the cancel protrusions 11 and 12, and the outer peripheral portion of the cam cylinder member 7 on the ratchet portion 6 side. It has a gentle arc-shaped slope as much as possible.

Next, the operation of the above configuration will be described with reference to FIGS. 3 to 9.

When the operating lever 5 is in the neutral position (N), the ratchet portion 6 is also in the neutral position shown in FIG. 1, and the tip of the ratchet portion 6 is outside the turning locus 15 of the cancel projection 11. Therefore, even if the cam cylinder member 7 is rotated together with the steering wheel 9, the ratchet portion 6 is not affected.

Now, the case where the operation lever 5 is rotated from the neutral position (N) to the right turn direction position (R) and the left turn direction position (L) will be described. Since the operating principles in both cases are the same, the right turn will be described below. The case where the directional position (R) is operated will be described as a representative.

The operation lever 5 moves from the neutral position (N) to the right turn direction position (R)
3, the ratchet portion 6 projects from the neutral position in the direction of arrow A on the tubular portion 1a side as shown in FIG. 3, and the tip of the ratchet portion 6 rotates along the trajectory 15 of the cancel projections 11, 12. Is moved to the cancel position located inside. Then, when the steering wheel 9 is rotated in the direction of arrow B, which rotates to the right, the cancel-prohibiting projection 13 of the cam cylinder member 7 engages with the ratchet portion 6, and along the inclined surface, as shown in FIG. Since the ratchet portion 6 is retracted in the direction of arrow C (direction opposite to the direction of arrow A), the cancel projection 11 cannot engage with the ratchet portion 6, and the operating lever 5 is held in the right turn direction position (R). In this state, the cancel protrusion 11 passes through the ratchet portion 6. Then, when the cancel protrusion 11 passes through the ratchet part 6, the ratchet part 6 is moved to the cancel position again as shown in FIG. After that, when the steering wheel 9 is rotated in the direction of arrow B, as shown in FIG.
The cancel projection 12 comes into contact with the ratchet portion 6 to swing the ratchet portion 6 in the arrow D direction. That is, in the turn signal switch unit 4, as is well known, when the operation lever 5 is operated to the right turn direction position (R), the ratchet portion 6 swings in the same direction when a force in the arrow D direction is applied. When the force is applied in the opposite direction, the operating lever 5 is returned to the neutral position (N), and conversely, when the operating lever 5 is operated to the left turn direction position (L), the ratchet is released. The portion 6 is allowed to swing in the same direction when a force is applied in the direction opposite to the arrow D direction, and the operation lever 5 is neutralized when a force is applied in the opposite direction (arrow D direction). It is configured to return to the position (N) by rotation. Then, when the steering wheel 9 continues to rotate in the direction of the arrow B, the states of FIGS. 3 to 6 are repeated. Here, for example, in the state of FIG. When 9 is rotated counterclockwise in the direction of arrow E (direction opposite to the direction of arrow B), as shown in FIG. 7, the cancel protrusion 11 of the cam cylinder member 7 engages with the ratchet portion 6. The operating lever 5 is in the neutral position (N)
Then, the state of FIG. 1 is restored. Therefore, as shown in FIG. 1, the cancel preparation angle α is an angle until the cancel prohibiting projection 13 provided on one cancel projection 11 gets over the ratchet portion 6.

Next, after the operation lever 5 is rotated from the neutral position (N) to the right turn direction position (R) and the ratchet portion 6 is moved to the cancel position as shown in FIG. 3, the steering wheel 9 is moved to the left. When it is rotated in the rotating arrow E direction (the direction opposite to the arrow B direction), as shown in FIG. 8, the cancel prohibiting protrusion 14 of the cam cylinder member 7 abuts the ratchet portion 6 and becomes an inclined surface. The ratchet portion 6 is retracted in the direction of arrow C along the direction, and the cancel protrusion 12 that first encounters becomes incapable of engaging with the ratchet portion 6, and the operation lever 5 is held in the right turn direction position (R) to cancel. Protrusion 12
Passes through the ratchet part 6. Then, as shown in FIG. 9, when the canceling protrusion 12 passes through the ratchet part 6, the ratchet part 6 is moved in the direction of arrow A to be in the cancel position again. When the steering wheel 9 is rotated counterclockwise from this position in the arrow E direction, the cancel projection 11 of the cam cylinder member 7 engages with the ratchet portion 6, and the ratchet portion 6 is moved in the arrow F direction (see FIG. 9). It passes through while swinging to and returns the operating lever 5 to the neutral position (N). Therefore, the reverse cancellation angle β is, as shown in FIG. 1, until the cancellation prohibiting protrusion 14 of the other canceling protrusion 12 gets over the ratchet portion 6 and the one canceling protrusion 11 engages with the ratchet portion 6. It becomes an angle.

According to the above-described embodiment, after the operation lever 5 is pivotally operated from the neutral position (N) to the right turn direction position (R) or the left turn direction position (L) and the ratchet portion 6 is moved to the cancel position, the cam cylinder is moved. When the member 7 is rotated in the direction opposite to the operating direction of the operating lever 5, the cancel prohibiting protrusion 14 or 13
Reverses the ratchet portion 6 so that the ratchet portion 6 cannot engage with the cancel protrusion 12 or 11 that the ratchet portion 6 encounters first. Therefore, the reverse cancel angle β is equal to the cancel prohibiting protrusion of the other cancel protrusion 12. The angle is such that 14 crosses over the ratchet portion 6 and one cancel protrusion 11 engages with the ratchet portion 6. On the other hand, the cancel preparation angle α is an angle until the cancel prohibiting protrusion 13 provided on one of the cancel protrusions 11 gets over the ratchet portion 6, and as a result, the cancel preparing angle α <the reverse cancel angle β. The relationship can be realized.

According to the above-described embodiment, since only one ratchet portion 6 is provided on the same side as the turn signal switch unit 4 with respect to the cam cylinder member 7, even when the turn signal switch unit 4 is removed. Since it is not necessary to remove the steering wheel 9, disassembly and repair can be easily performed. Of course, the same applies when the wiper switch unit 3 is removed.

FIGS. 10 and 11 show another embodiment of the present invention. The difference from the above embodiment is that the cancel projections 11 and 12 are different.
One cancel-prohibiting projection 16 is provided to continuously connect the surface portions of the ratchet portion 6 side. According to this embodiment, when the operation lever 5 is rotated from the neutral position (N) to the right turn direction position (R), for example, the ratchet portion 6 moves in the arrow A direction as shown in FIG. Immediately, it comes into contact with the cancel prohibiting projection 16 and assumes the state of FIG. 4 or FIG. 8 of the embodiment. Therefore, this embodiment also has the same effect as the above embodiment.

[Effects of the Invention] As is apparent from the above description, in the turn signal canceling device of the present invention, the cam cylinder member operates the operating lever on the ratchet side surface of the two cancel protrusions of the cam cylinder member. A cancel-prohibiting protrusion that retracts the ratchet portion so that the ratchet portion that first encounters the ratchet portion when rotated in the opposite direction is disengaged is provided. The angle can be set larger than the angle, and even in this case, the mechanical portion can be easily disassembled and repaired.

[Brief description of drawings]

1 to 9 show an embodiment of the present invention. FIG. 1 is a plan view showing a cross section of a main part, FIG. 2 is a side view showing a cross section of the main part, and FIG. 9 to FIG. 9 are diagrams corresponding to FIG. 1 in different states, and FIGS. 10 and 11 are diagrams corresponding to FIGS. 1 and 3 showing another embodiment of the present invention. In the drawing, 4 is a turn signal switch unit (mechanical part), 5 is an operating lever, 6 is a ratchet part, 7 is a cam cylinder member, 9 is a steering wheel, 11 and 12 are cancel projections, and 13 and 14 are cancellation prohibition projections. Reference numeral 15 is a rotation locus, and 16 is a cancel prohibiting projection.

Continued front page (56) References Open 63-4847 (JP, U) Open 61-57051 (JP, U) Open 63-189834 (JP, U) Open 62-203743 (JP) , U) West German patent application publication 2201157 (1973) (DE, A)

Claims (1)

[Claims] 1. A cam cylinder member which is rotated by a steering wheel and which has two canceling protrusions on its outer peripheral portion, and which is provided so as to be operated from a neutral device to a rightward turning direction position and a leftward turning direction position by an operating lever. When the cam cylinder member is rotated in the operating direction of the operating lever, the ratchet portion is swung to allow passage of the canceling protrusion and is operated in the operating direction. And a mechanism portion that performs a canceling operation by engaging the cancel projection portion with the ratchet portion when the ratchet portion is rotated in the opposite direction to the ratchet portion of the two cancel projection portions of the cam cylinder member. On the side surface portion, the cancel that first encounters the ratchet portion when the cam cylinder member is rotated in the direction opposite to the operating direction of the operating lever. Projection cancellation device of the turn signal, characterized in that is provided a cancel prohibition protrusion to retract the ratchet portion so as to be incapable engagement.