JPS6156806B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a load control device suitable for vehicle turn signal control and window regulator control.

For example, turn signal control is a control that turns on or off a turn signal lamp depending on the operation mode of a turn signal switch.If the turn signal switch is installed close to the handle shaft, The return after operation of the signal switch can be mechanically linked to the return of the handle, thereby allowing automatic return.

However, when installing the turn signal switch at a location away from the handle shaft,
The automatic return after the operation can be performed using a sensor that detects the return of the steering wheel and a solenoid that is activated by the signal from the sensor, or a momentary switch can be used for the turn signal switch, and the operation contents can be controlled electrically. Countermeasures have been taken, such as latching the lock and releasing the latch using a signal from the same sensor as described above.

However, when using this momentary switch, when switching from the flashing state of one turn signal lamp to the flashing state of the other turn signal lamp, it is necessary to turn off the one turn signal lamp and turn on the other turn signal lamp. Two operations were required. In this case, it is conceivable to use a selection switch with a reset contact at another position, but it is not possible to make the above transition with one operation. Moreover, the selection switch requires a total of three fixed contacts, one for switching to the right, one for switching to the left, and one for neutral reset, which has the drawback of requiring one extra lead wire.

An object of the present invention is to provide a load control method that eliminates the above-mentioned disadvantages by using a momentary switch but changing the load switching state depending on the length of the switching operation time. be.

Hereinafter, the present invention will be explained in detail with reference to an embodiment for turn signal control. Figure 1 shows a part of the structure of momentary switch A as a turn signal switch.The right fixed contact 1, the left fixed contact 2, and
The movable contact 3 is normally in a neutral state by being given a return force by a spring, etc. When operated in the R direction, it comes into contact with the right fixed contact 1, and when operated in the L direction, it contacts the left fixed contact 1. Contact point 2.

Figure 2 shows the binary logic level H from right fixed contact 1 and left fixed contact 2 of momentary switch A.
This is a control circuit for controlling the right turn signal lamp P _R and the left turn signal lamp _PL as loads in response to the pulses. This circuit is RS・
FF4 and 5, AND Gate 6-9, OR Gate 1
0 and 11, delay (integration) circuits of about 0.5 seconds 12 and 1
Equipped with 3. 14 is a sensor that detects the direction of rotation of the handle shaft; when the handle rotates to the right, the signal at terminal 14R becomes H (high), and the signal at terminal 14L becomes L (low); conversely, when the handle rotates to the left, the signal at terminal 14R becomes L (low). The signal at terminal 14R becomes L, and the signal at terminal 14L
The signal becomes H. A relay coil 15 is energized to close the contact 15a when the Q output of the RS/FF 4 is H, and a relay coil 16 is energized to close the contact 16a when the Q output of the RS/FF 5 is H.
17 is a flasher circuit.

In the circuit shown in Figure 2, initially RS/FF
4 and 5 both have their Q outputs at L and outputs at H, so AND gates 6 and 8 are open and AND gates 7 and 9 are closed. Therefore, in this state, move the movable contact 3 of the momentary switch A to the right fixed contact 1.
When it touches the right fixed contact 1, the signal from the right fixed contact 1 becomes H, and this signal passes through the open AND gate 6 and enters the S input of RS/FF4, so that RS/FF4 is inverted and becomes Q. The output becomes H, the relay coil 15 is energized and the contact 15a is closed.
Current flows through the flasher circuit 17 to the right turn signal lamp _PR , and the lamp _PR starts blinking. After that, even if the movable contact 3 of the momentary switch A is released, this state continues due to the latching operation of the RS/FF 4.

When the right turn signal lamp P _R is blinking in this way, if the movable contact 3 of the momentary switch A is brought into contact with the left fixed contact 2,
At this time, the AND gate 9 that receives the Q output of the RS/FF4 is open, and the other AND gate 8 is closed, so the H signal from the left fixed contact 2 passes through the AND gate 9 and then the OR gate 10. As expected, it enters the R input of RS/FF4, and therefore its
RS/FF4 is restored, the Q output becomes L, the relay coil 15 is deenergized, and the right turn signal lamp P _R stops blinking.

Here, if the switching state of the momentary switch A is switched to the left fixed contact 2 side and then immediately stopped so that the movable contact 3 returns to neutral, the operation will end in the above state, but for a period of time determined by the delay circuit 12. If the movable contact 3 continues to touch the left fixed contact 2, the left turn signal lamp P
_L starts blinking. That is, when the RS•FF 4 returns, the output becomes H, and this H signal is output from the delay circuit 12 after a predetermined time delay, and the AND gate 8 is opened. Therefore, up until this point, if the signal from the left fixed contact 2 of the momentary switch A is H, the H signal passes through the open AND gate 8 and enters the S input of the RS・FF5, and the RS・FF5 inputs the S input.
FF5 is inverted and the Q output becomes H. Therefore, the relay coil 16 is energized and the contact 16a is closed.
Current flows through the flasher circuit 17 to the left turn signal lamp _PL , and the lamp _PL starts blinking.

As mentioned above, the right turn signal lamp P _R
If the momentary switch A is switched to the left side during the flashing operation, that lamp P _R will go out, and if this switching state is continued, the left turn signal lamp P _L will start blinking. Therefore, depending on the length of the switching operation time, it is possible to select whether to turn off the currently blinking lamp or to start blinking another lamp.

Furthermore, if the handle is returned during the blinking operation, the RS/FF 4 or 5 is restored by a signal from the sensor 14, and the blinking operation is stopped. That is, if the steering wheel is rotated to the left while the right turn signal lamp P _R is flashing, the signal at the terminal 14L of the sensor 14 becomes H, and the RS signal is output via the OR gate 10.
Enters the R input of FF4 and restores the RS/FF4. Also, if the steering wheel is rotated to the right while the left turn signal lamp P _L is flashing, the signal at the terminal 14R of the sensor 14 becomes H and enters the R input of the RS/FF5 via the OR gate 11.
Restore RS/FF5.

Note that, although the above is an example of turn signal control, it can also be applied to control of a wind regulator or a sunroof. Furthermore, the control circuit shown in FIG. 2 can be performed by a microcomputer.

As described above, according to the present invention, the load can be controlled by changing the length of the operation duration of the switch.
If a momentary switch is used for turn signal control, even if there are two fixed contacts, it is possible to select whether to cancel one lamp blinking or to cancel the blinking and start blinking the other lamp with a single operation. This also contributes to the safety of driving.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the mechanism of the momentary switch.
FIG. 2 is a control circuit diagram for turn signal control. A...Momentary switch, 1...Right fixed contact, 2...Left fixed contact, 3...Movable contact, 1
2, 13...delay circuit, 14...sensor, 17...
...Flash circuit.

Claims (1)

[Claims] 1 A momentary switch that has two loads, such as a lamp, a first and a second load, and a first and second switch, and normally keeps both switches in the off state, and a momentary switch that has two loads, such as a lamp, and a first and second switch. When the switch is turned on, the first load is energized, and when the second switch is turned on, the second load is energized, and the first
When the load is energized, the second switch is turned on.
If the first switch is turned on when the load is energized, the power to each load is cut off, and if the second switch and the first switch are turned on for more than a predetermined time set by the timer circuit, each load is de-energized. A load control device characterized by comprising a control circuit that switches energization to a load.