JPH0327159B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a power window control device for controlling opening and closing of side doors and windows 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.
A child may operate the switch by touching it,
In order to prevent accidents such as infants getting stuck in the window glass, this is installed near the center of the car. 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, 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.

[Problem that the invention seeks to solve]

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

[Means for solving problems]

In order to solve these drawbacks, this invention
It is designed to reduce the energy of infrared rays sent out when sending out a specific code signal.

[Effect]

When performing specific control, the control is performed only when the infrared light emitting section of the operating section is correctly directed toward the light receiving section.

〔Example〕

FIG. 1 is a circuit diagram showing an embodiment of the present invention, in which 1 is a control circuit for controlling infrared transmission;
a to 2b are resistors, 3a and 3b are diodes, 4 is an infrared light emitting diode, and 5a and 5b are transistors. The control circuit 1 is configured to send control signals corresponding to control items from a terminal 1a,
When the control item is a specific item, for example, the control to close a window glass, when the switch 10 for that purpose is pressed, the transistor 11 is turned on, and a "0" level signal is sent from the terminal 1b via the diode 12. At other times, a "1" level signal is sent from the terminal 1b. Note that 13 is a resistance.

The device configured in this manner is housed in a case and is detachably attached to an appropriate location within the vehicle. The part surrounded by the dashed line constitutes the transmission output reduction circuit, and also includes the control circuit 1.
includes an operation section for performing various controls.

In the device configured as described above, when the operating section included in the control circuit 1 is operated, a control signal corresponding to the control item is sent out from the terminal 1a.
This control signal is an on/off code signal corresponding to the control item, and as the transistor 5a turns on/off according to this code signal, coded infrared rays are sent out from the infrared light emitting diode 4. .

When the control item is a signal to open the window glass,
Since the signal sent from the terminal 1b of the control circuit 1 is at the "1" level, the transistor 5b also turns on and off in synchronization with the transistor 5a at this time, and the current flowing through the infrared light emitting diode 4 is caused by the resistors 2d and 2c. It is determined by the resistance value of If the resistance value of the resistor 2c is made sufficiently smaller than the resistance value of the resistor 2d, at this time the infrared light emitting diode 4
The current flowing through is mostly dominated by the resistor 2c.

On the other hand, when the control item is to close the window glass, when the switch 10 is pressed, the signal sent from the terminal 1d of the control circuit 1 goes to the "0" level, so the transistor 5b is turned off, and at this time, infrared light is emitted. The current flowing through the diode 4 is controlled only by the value of the resistor 2d. Therefore, the energy of the infrared rays emitted from the infrared light emitting diode 4 is small when performing control to close the window glass, and the energy of the infrared rays emitted from the infrared light emitting diode 4 becomes large when performing other controls.

Further, the infrared light emitted from the infrared light emitting diode 4 has a directivity as shown by the dotted line in FIG. Therefore, when performing control to close the window glass, the energy of the infrared rays is determined so that the infrared rays are received by the light receiving part only when the main optical axis A of the infrared light emitting diode 4 is directed toward the light receiving part (not shown); When performing the control, if the energy of the infrared rays was determined so that the infrared rays emitted from any angle within the directional pattern would be received by the receiver, the control to close the window glass would have been performed carelessly. It will not be effective and will keep you safe.

FIG. 3 is a circuit diagram showing another embodiment.
The same symbols are used for the same parts and corresponding parts as in the figures. Similarly to the circuit shown in FIG. 1, this circuit also uses transistors 5a and 5a to control opening of the window glass.
5b is turned on, a large current flows through the infrared light emitting diode 4, and the resistance values of the resistors 2c and 2d are set so that a small current flows through the infrared light emitting diode 4 when the window glass is controlled to close. Note that 14 is a diode.

The above assumes that the specific control is to close the window glass, but this control may also be used to open and close the window glass on the driver's seat.In this case, the light receiving section is installed near the dash board, and the specific control The infrared energy of the infrared light emitting diode 4 may be set so that the infrared rays emitted from the seat can be detected by the light receiving section, but the infrared rays emitted from a farther position cannot be detected by the light receiving section.

〔Effect of the invention〕

As explained above, this invention lowers the energy of the infrared rays sent out when performing specific control, so even if a specific control is performed carelessly, the control will not be effective, and the specific control will not be effective. When control is important, there is an effect of safety because unexpected accidents do not occur due to careless operations.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing one embodiment of the present invention, FIG. 2 is a diagram showing directional characteristics of an infrared light emitting diode, and FIG. 3 is a circuit diagram showing another embodiment. 1... Control circuit, 2a to 2d... Resistor, 3a,
3b...Diode, 4...Infrared light emitting diode, 5a, 5b...Transistor.

Claims (1)

[Claims] 1.Equipped with a receiver having an infrared light receiving part fixed inside the car, and a transmitter having an infrared transmitting part and having a removable structure inside the car, and depending on the infrared code sent from the transmitter, the side door window A power window control device for controlling opening and closing of a power window, characterized in that the transmitter is provided with a transmitter output reduction circuit that reduces the energy of infrared rays sent out from the transmitter when sending out a specific infrared code.