JPH0335876B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power window control device for controlling opening and closing of a window in a side door of an automobile.

[Conventional technology]

In recent years, power windows, which can be opened and closed by operating a switch, have come into widespread use as side door windows of automobiles. The switch for controlling the opening and closing is activated when the infant is near the window.
It is installed near the center of the car to prevent accidents such as touching an infant's body and causing the infant to become trapped in the window glass. In this case, when selecting the window to be opened/closed, it is easier to perform the selection operation at hand, so the operation section is made removable and an infrared code signal is sent from the operation section. It is conceivable that this infrared code signal is received by an infrared light receiving section provided in the.

[Problem that the invention seeks to solve]

However, even with this type of device, there is still a risk of being caught by the window glass if an erroneous operation is performed, and in order to prevent such erroneous operation, with conventional devices, the control to close the window glass is not mechanically controlled. It has the disadvantages that it requires a complicated structure, such as having to remove a lock before operation, is large, and is not economical.

[Means for solving problems]

In order to solve these drawbacks, this invention
When a specific code signal is received, the receiving sensitivity of the receiver is reduced.

[Effect]

The specific code signal is received only when the infrared emitting section of the operating section is correctly directed toward the light receiving section.

〔Example〕

FIGS. 1 and 2 are circuit diagrams showing one embodiment of the present invention, with FIG. 1 being a circuit diagram of a transmitter and FIG. 2 being a circuit diagram of a receiver. In Figure 1, 1 is a battery;
2 is a transmitter, 3a to 3d are switches for controlling window glass opening/closing, 4 is a light emitting diode that generates infrared rays, 5 is a light emitting diode for transmission display to indicate that infrared rays are being transmitted, 6a and 6b are transistors, 7 is a diode, 8 is a capacitor, 9a,
9b is a resistance. The transmitter 2 includes switches 3a to 3
When any one of the switches d is operated, a code signal corresponding to that switch is sent out from the terminal 2a. The switch 3a is for lowering the window glass on the left door, the switch 3b is for raising the window glass on the left door, the switch 3c is for lowering the window glass on the right door, and the switch 3d is for raising the window glass on the right door. It is.

In FIG. 2, 10a to 10d, 12a, 1
2b is a diode, 11 is a Zener diode,
13 is a resistor, and 15a and 15b are switches.
20 is a constant voltage circuit, 21 is a photodiode for light reception, 22 is an amplifier circuit, 23 is a detection circuit, 24 is a decoder, 25 is a reset circuit, 26a to 26g
is an inverter, 27, 28, 29, 30 are relays, 27a, 28a, 29a, 30a are relays 2
Contact points 7 to 30 and 35 and 36 are motors. The motor 35 is a motor for raising and lowering the window glass of the left door, and the motor 36 is a motor for raising and lowering the window glass of the right door.

The constant voltage circuit 20 includes a diode 21a, capacitors 21b and 21c, a resistor 21d, a Zener diode 21e, and a transistor 21f. The amplifier circuit 22 includes resistors 22a to 22h, a diode 22i, capacitors 22j to 22t, a transistor 22u, and an IC 22v.
The detection circuit 23 includes a transformer 23a and a capacitor 23.
a, 23c, diode 23d, resistor 23e~2
3i and a comparator 23j.
The decoder 24 includes an IC 24a, a resistor 24b, an oscillator 24c, and capacitors 24d and 24e. The reset circuit 25 includes a capacitor 25a,
25b, resistors 25c, 25d, diode 25
e and a transistor 25f. Furthermore, when the signal supplied to the terminal XVI raises the window glass of the left door, the IC 24a of the decoder 24 sends out a "1" level signal from the terminal IV.
When the window glass of the left door is lowered, a signal of level "1" is sent from terminal V, and when the window glass of the right door is lowered, a signal of level "1" is sent from terminal VI, When the right door window gas is to be raised, a "1" level signal is sent from terminal VII. and,
A level shift signal is sent from terminal X only during a period when a specific signal is supplied to terminal XVI. This level shift signal is transmitted to the comparator 2 only when the center of the directional characteristics of the light emitting diode 4 shown in FIG.
3j is set to a level for detecting the signal supplied to the non-inverting input terminal. Note that in this embodiment, the specific signal is a signal for closing the window glass.

The operation of the device configured in this way is as follows. When the ignition switch of the automobile is turned on, power is supplied to the terminal IG shown in Fig. 2, the transistor 25f is turned on for a time determined by the capacitor 25a and the resistor 25c, the decoder 24a is reset and set to the initial state, and when the power is turned on. This prevents malfunction.

When the switch 3a of the transmitter shown in FIG. It emits infrared rays intermittently depending on the signal. and,
This infrared rays are received by a photodiode 21 of the receiver shown in FIG. 2 and converted into an electrical signal.

The electrical signal generated by the photodiode 21 is amplified by an amplifier circuit 22, detected by a detection circuit 23, and supplied to a decoder 24. Since the signal sent out at this time is a signal to open the window glass of the left door, the decoder 24 sends out a "1" level signal from the terminal V. This signal is transmitted to the inverter 26
Since relay 28 is driven via e, relay 2
Contact point 28a of No. 8 is controlled to a position opposite to that shown in FIG. As a result, the motor 35 rotates to lower the window glass of the left door, and the glass window of the left door lowers.

The signal at this time is a signal that lowers the glass window, and is not a specific signal, so the terminal
is at the "0" level. Therefore, the detection level of the comparator 23j is the same as that of the resistors 23f, 23
Since it is determined by the resistance value of g and 23i, if you set this value to an appropriate value and set the receiver sensitivity to the maximum sensitivity, the transmitter will
No matter which part of the directional characteristic is directed toward the receiver,
Infrared radiation emitted from the transmitter is detected by the receiver.

Next, when the switch 3b of the transmitter shown in FIG. 1 is pressed in order to close the window glass of the left door, this signal is a signal for closing the window glass, and since it is a specific signal, the decoder 24a is sent to the terminal The signal at the predetermined level mentioned above is sent from X. Therefore, the detection level of the comparator 23j becomes high, and the input signal is detected only when the center of the directional characteristic of the light emitting diode 4 of the transmitter shown in FIG. 1 is correctly directed toward the photodiode 21 shown in FIG. become.
The signal sent from the transmitter is repeatedly sent out, and when the above operation is performed first and the same signal is received from the second time onward, a "1" level signal is sent from the terminal IV of the IC24, and this signal is sent to the inverter. 2
By driving relay 27 via 6d, motor 35 is reversed, and the window glass of the left door is closed.

Therefore, when operating the transmitter for the purpose of closing the window glass, point the transmitter in the correct direction and operate it, so that the window glass can be closed.
If the transmitter is operated unconsciously or carelessly as a result of a prank, the window glass will not close because the direction of the transmitter is undefined, and safety will be maintained. When the signal transmission from the transmitter is stopped, the relays 27 to 30 are restored, the motors 35 and 36 are short-circuited, and the window opening/closing operation is immediately stopped.

The receiver shown in Figure 2 not only controls the power windows by remote control, but also controls the switch 1.
By operating 5a and 15b, the glass window of the right door can be manually raised or lowered. At this time, the IC is
Since the terminal XVI of 24a is kept at the "0" level, even if remote control is performed by mistake, the remote control will be ignored. Further, by using the switches 15a and 15b, even if the battery of the transmitter is completely discharged, only the glass window on the right door can be opened/closed.

In addition, since the receiver does not operate unless the ignition switch is turned on, the window will not open even if it is pranked with a transmitter of the same type, reducing the risk of theft and increasing safety by preventing others from tampering with it. You can also ensure sex.

Note that although the specific control described above is for closing the window glass, this control may also be for opening and closing the window glass on the driver's seat side. In this case, the entire receiver or the photodiode 21 may be installed near the dash board. For certain controls, the energy of the infrared rays should be set so that the infrared rays sent from the driver's seat can be detected by the light receiving section, but the infrared rays sent from a position further away cannot be detected by the photodiode 21. good.

〔Effect of the invention〕

As explained above, the present invention is designed to reduce the reception sensitivity when the received signal is for specific control, so even if the specific control is performed carelessly, the control When the control is not effective and a specific control is important, there is an effect that it is safe because unexpected accidents do not occur due to careless operations.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a transmitter, and FIG. 2 is a circuit diagram of a receiver showing an embodiment of the present invention. 4... Light emitting diode, 21... Photo diode, 23... Detection circuit, 24... Decoder, 3
5, 36...Motor.

Claims (1)

[Claims] 1 Equipped with a receiver that is fixed inside the vehicle and has an infrared light receiving section, and a transmitter that has an infrared transmitting section and is removable inside the vehicle, and the window of the side door is activated in response to the infrared code signal sent from the transmitter. What is claimed is: 1. A power window control device for controlling opening and closing of a power window, characterized in that the receiver is provided with a receiving sensitivity reducing means for reducing the sensitivity of the receiver when a specific infrared code signal is being received.