JPS6241876Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotation direction detection sensor that detects the return rotation of a steering wheel of an automobile and stops the indicating operation of a direction indicator.

Traditionally, most car turn signal switch mechanisms have been mechanical, and the switch is manually operated by moving a lever to close the switch and turn the steering wheel in the direction the car is turning while making the indicator light flash. For example, when the handle was turned back and turned after the turn was completed, the lever was mechanically returned to its original neutral position and the switch was turned off. However, with this mechanism, the operating lever must be mechanically operated by rotating the handle, and the switch mechanism must be mounted around the handle shaft, which limits the degree of freedom in design. In recent years, there has been a major change in the design of interior panels, and instead of this mechanical lever-based turn signal switch mechanism, there has been a demand for one that opens and closes the turn signal switch electrically. In response to this, the inventors of the present invention proposed in Utility Model Registration Application No. 44759 filed in 1981 that when the handle is turned back after turning a corner, the return rotation of the handle is detected and the switch held in the closed state is activated. We are proposing a rotation direction detection sensor that is electrically released. however,
This sensor has a mechanism in which the rotation of the steering wheel is directly transmitted to the rotor, so the rotor rotates due to idle rotation of the steering wheel that is constantly touched during driving, and this causes friction between the rotors and friction between the rotors. A problem has been discovered that causes friction between the fixed member and the contact points, which accelerates wear and reduces durability.

The present invention was developed in view of such conventional problems, and includes a fitting portion between a transmission rotor that rotates as the handle rotates and a driven rotor that rotates following the rotation of the transmission rotor and opens and closes the switch contact. By giving the angular degree of freedom approximately equal to the idle rotation angle of the handle, the driven rotor does not move at the idle rotation angle of the handle, preventing wear caused by small and constant wobbling of the handle, and improving durability. The purpose is to provide a direction detection sensor.

The present invention will be explained below along with embodiments shown in the figures.

1 to 7 show a first embodiment, 1 is a handle, 2 is a shaft that rotates with the rotation of the handle 1, and 3 is a fixed part such as a housing disposed around the outer circumference of the shaft 2 (Fig. A cylindrical portion 3a is formed in the center of the fixing member (not shown), into which the shaft 2 is inserted. Further, on the outer peripheral upper surface of the fixing member 3, a left fixed contact 3b and a right fixed contact 3c are formed at an angle of about 120 degrees apart, as shown in FIGS. 5 to 7. Further, the inner peripheral side of this fixing member 3 is formed into a recessed part 3d, and the stepped part has the above-mentioned left and right fixed contacts 3b and 3c, respectively.
Guide grooves 3e of a desired length are formed at an angle of 120 degrees. Reference numeral 4 denotes a transmission rotor having a cylindrical portion 4a that is fitted into the cylindrical portion 3a of the fixed member 3, and a projection 4c is formed on the upper surface of the flange portion 4b, which fits into the small hole 1a formed on the lower surface of the handle 1. has been done. Therefore, as the handle 1 rotates, the transmission rotor 4 is rotated. Further, as shown in FIG.
d is provided in one or more axial directions.
Reference numeral 5 denotes a driven rotor having a cylindrical portion 5a fitted into the cylindrical portion 4a of the transmission rotor 4. As shown in FIG. 2, grooves 5e are provided on the inner circumferential surface of the cylindrical portion 5a of the driven rotor 5 in a number corresponding to the number of protrusions 4d on the cylindrical portion 4a of the transmission rotor 4. The width of this protrusion 4d is set smaller than the width of the groove 5e, and as shown in FIG. As a result, the shaft 2 of the handle 1 rotates with play, and along with this, the transmission rotor 4
Even if the driven rotor 5 is rotated, the driven rotor 5 will not rotate if the rotation angle is within the rotation angle α. As shown in FIG. 4, the lower surface of the flange 5b of the driven rotor 5 is formed with one movable contact 5c branched into two, and a ring-shaped pressure protrusion 5d excluding the movable contact 5c. There is.
Further, one contact of the movable contact 5c is connected to the fixed member 3.
The fixed contacts 3b and 3c come into contact with the fixed contacts 3b and 3c. 6
is an auxiliary rotor that rotates together with the driven rotor 5 and is slidable in the direction of the shaft 2, and has a stepped portion 6a formed on its outer peripheral surface. Reference numeral 7 is a semi-fixed member whose inner peripheral surface is placed on the stepped portion 6a of the auxiliary rotor 6, and a stopper 7a that is inserted into the guide groove 3e of the fixed member 3 is formed on the outer periphery of the semi-fixed member. Further, a ring-shaped semi-fixed contact 7b is formed on the upper surface of the semi-fixed member 7 over an angle of approximately 240 degrees. The pressing protrusion 5d of the driven rotor 5 described above is in contact with the upper outer circumferential surface of the semi-fixed member 7. A spring 8 is interposed between the flange 4b of the rotor 4 and the flange 5b of the driven rotor 5, and presses the driven rotor 5. Therefore, the driven rotor 5
The pressing protrusion 5d presses the semi-fixed member 7, and the semi-fixed member 7 presses the stepped portion 6a of the auxiliary rotor 6.
Since the auxiliary rotor 6 rotates together with the driven rotor 5, friction occurs between the outer periphery of the semi-fixed member 7 and the pressing ridge 5d of the driven rotor 5, and the inner periphery of the auxiliary rotor 6 Friction occurs between the step portion 6a and the step portion 6a. This causes the rotor 4 to move to the handle 1.
, the friction between the driven rotor 5 and the auxiliary rotor 6 causes the stopper 7a to rotate in the rotational direction of the rotor 4 until it comes into contact with the end surface of the guide groove 3e. This half-fixed contact 7b is in a parallel state with either of the fixed contacts 3b and 3c. That is, when the handle 1 is rotated clockwise, the semi-fixed member 7
is rotated in the direction of the arrow in FIG. 6, and when the stopper 7a abuts the end face of the guide groove 3e, the left fixed contact 3b and the semi-fixed contact 7b are in a parallel state. Therefore, the handle 1 is further rotated and the driven rotor 5
When the movable contact 5c passes both the contacts 3b and 7b, the contact between the two contacts 3b and 7b is closed. When the handle 1 is rotated to the left, the movable contact 5c closes the fixed contact 3c and the semi-fixed contact 7b as shown in FIG.

FIG. 8 shows another embodiment. Whereas in the above embodiment the semi-fixed member 7 is held and rotated between the driven rotor 5 and the auxiliary rotor 6, in this embodiment the semi-fixed member 7 is semi-fixed by a spring 8. In addition to pressing the member 7, the auxiliary rotor 6 is omitted, and movable contacts 5c electrically connected to the upper and lower surfaces of the driven rotor 5 are formed. In other words, the semi-fixed member 7 is the driven rotor 5
It is rotated by friction with the outer periphery of the

Next, using the rotation direction detection sensor described above,
The operation of canceling a direction indicator light in an automobile will be explained with reference to FIG.

9R, 9L are left/right direction switch, 10R,
10L is a latch circuit, which connects the direction indicator switch 9
It is set when R and 9L are closed. 11 is a flash relay, 12R and 12L are latch circuits 10
The left and right direction indicator lights 13 are connected to the contacts of relays 10R' and 10L' inside R and 10L, and the latch circuit 1 is manually operated without using the direction indicator sensor.
This is a cancel switch that resets 0R and 10L via a diode 14.

Next, the operation will be explained. When the right direction indicating switch 9R is closed, the latch circuit 10R is set and the contact of the relay 10R' is closed. Therefore, the flasher relay 11 causes the right direction indicator light 12R to blink.

If you wish to stop blinking of the right direction indicator light 12R, closing the cancel switch 13 brings the reset terminal of the latch circuit 16R to ground potential via the diode 14, so the latch circuit 10R is reset and the relay 10R' becomes inoperative and the right direction indicator light 12R is turned off.

Next, a description will be given of the operation of automatically extinguishing the right direction indicator light 15R by operating the return rotation handle to the left after completing a right turn while the right direction indicator light 12R is flashing.

When the handle 1 is rotated to the right, the semi-fixed member 7
is rotated clockwise as shown in Fig. 6, and the fixed contact 3b
The semi-fixed contact 7b is closed by the movable contact 5c, and the closing of this switch is performed by the latch circuit 10R.
does not have any influence on

When the handle 1 is rotated to the left by operating the return rotation handle after turning to the right, the semi-fixed member 7 is also rotated to the left, and then the movable contact 5c moves between the fixed contact 3c and the semi-fixed contact 7b. Closed.
Therefore, the reset terminal of the latch circuit 10R becomes ground potential and is reset, so that the relay 10
R' becomes inoperative and the right direction indicator light 12R is turned off.

In the above embodiment, the case where the flashing operation of the right direction indicator light 12R is canceled has been described, but the operation is the same as that described above when the blinking operation of the left direction indicator lamp 12L is canceled, so a description thereof will be omitted. In addition, in this switch operation for indicating the direction and canceling the direction instruction, the handle constantly swings by the idle rotation angle, but when this swing angle is approximately α, the rotation of the handle 1 is transferred from the transmission rotor 4 to the driven rotor 5. Since this is not transmitted, the direction indication release cannot be inadvertently caused by steering wheel shake while rounding a corner.

As described above, the present invention has a fitting part between the transmission rotor, which rotates as the handle rotates, and the driven rotor, which is fitted with the transmission rotor and rotates to open and close the direction indicator switch contact. Since it provides rotational degrees of freedom of approximately equal angles,
The driven rotor does not rotate due to the vibration of the handle that constantly occurs during normal operation, and this prevents movement due to the vibration of the switch between the rotor and fixed members, between members, and between the contact points of the switch. This has the advantage that there is no transmission of energy between these parts, so there is no wear between these parts, and the switch is highly durable and can be expected to operate stably over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of one embodiment of the present invention, FIG. 2 is an exploded perspective view showing a combination of a transmission rotor and a driven rotor used in the same, and FIG. 3 is an A--
A-line cross-sectional end view, FIG. 4 is a plan view of the driven rotor,
FIG. 5 is a plan view of a combination of a fixed member and a semi-fixed member, FIGS. 6 and 7 are plan views of a combination of a driven rotor, a fixed member, and a semi-fixed member showing operating states, and FIG. 8 9 is a sectional view of another embodiment of the present invention, and FIG. 9 is a circuit diagram for controlling a direction indicator light. DESCRIPTION OF SYMBOLS 1... Handle, 2... Shaft, 3... Fixed member, 4... Transmission rotor, 5... Driven rotor.

Claims (1)

[Scope of utility model claims] The rotation transmitting rotor is provided with a rotation transmitting rotor that rotates as the handle rotates, and a driven rotor that is fitted to the rotation transmitting rotor and rotates as a result of rotation, and switches the switch in response to the rotation and return rotation of the handle. A rotational direction detection sensor characterized in that a fitting portion between a driven rotor and a driven rotor is provided with an angular degree of freedom approximately equal to an idle rotation angle of a handle.