JPS62253Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an antenna drive control device for an automobile, which is equipped with a retrigger circuit so that when the radio switch is operated again while the timer circuit is in operation, the timer circuit is restarted from that time. It is.

Conventionally, in this type of automotive antenna drive control device, when the antenna motor of the antenna motor circuit is locked, a detection circuit is activated to stop the antenna motor. According to this conventional technology, it is difficult to detect the locked state due to voltage fluctuations in an antenna motor where there is a slight difference in current between the normal state and the locked state, and if the antenna motor is burnt out, problems such as It was hot.

As another conventional technique for dealing with this problem, one using a timer means has been considered. For example, when a radio switch is turned on, the antenna motor is energized for a certain period of time, and even if the motor becomes locked, the energization is stopped after the certain period of time, thereby preventing burnout of the motor.

However, in the conventional technology using the above-mentioned timer means, the timer means stops energization after a certain period of time as described above. Therefore, for example, if the radio switch is turned off while the antenna motor is being biased toward the antenna upward side due to the ON action of the radio switch, the antenna motor is biased toward the antenna downward side. Time passes on the ascent and time is running out on the descent. Therefore, when turning the radio switch on and off, the time required for raising and lowering the antenna exceeds the time set by the timer means, and the antenna sometimes stops midway through the raising and lowering operation.

This invention was devised to solve the above-mentioned problem, and a retrigger circuit is connected to the timer circuit, so that the timer circuit is restarted when a radio switch, ignition switch, etc. is turned on or off. The object of the present invention is to provide a novel automotive antenna drive control device. DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an automotive antenna drive control device according to the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a diagram showing a first embodiment of the device according to the present invention, in which 1 is a radio switch, 2 is a relay, 3 is an antenna motor circuit, and 4 is an antenna. The radio switch 1 is connected to a relay 2.

5 is a voltage detection circuit. Reference numeral 6 denotes a trigger circuit, which is connected to the output side of the voltage detection circuit 5.

7 is a gate circuit, which is connected to the output side of the trigger circuit 6. 8 is a timer circuit, which is connected to the output side of the gate circuit 7. Reference numeral 9 denotes a delay circuit, which is connected to the gate circuit 7. Reference numeral 10 denotes a motor-driven relay, which includes a relay contact 10a and a relay coil 10b. The voltage detection circuit 5 includes resistors 11, 12, and 13, and is constituted by a connection circuit of a transistor 14 and a diode 48.

The trigger circuit 6 is composed of a capacitor 15 and a resistor 16, and the capacitor 15 is connected to a connection point B between the collector of the transistor 14 and the resistor 13. A resistor 16 is connected between the capacitor 15 and ground. The gate circuit 7 is composed of a NAND logic circuit, and one input terminal is connected to a capacitor 15.
and the connection point between the resistor 16 and the resistor 16. The timer circuit 8 is composed of a series connection circuit of NAND logic circuits 17 and 18, a capacitor 19, a NAND logic circuit 20, and a transistor 21.

The collector of the transistor 21 is connected to the relay coil 10b of the motor drive relay 10. The delay circuit 9 is composed of a connection circuit of a resistor 22 and a capacitor 23.

The other input terminal of the gate circuit 7 is connected to a resistor 22.
and a connection point between the capacitor 23 and the diode 24 . The diode 2
The output side of 4 is connected to a connection point between relay coil 10b of motor drive relay 10 and transistor 21. 25 is a resistor, and a capacitor 19
It is connected to the connection point of the NAND logic circuit 20.

In the figure, 2a and 2b are fixed contacts of relay 2, and 2c
is a movable contact, and 2d is a relay coil.

The antenna motor circuit 3 is composed of an ascending limit switch 3a, an ascending motor coil 3b, a descending limit switch 3c, and a descending motor coil 3d. 3f is an antenna claw.

26 is a DC power supply.

27 is a retrigger circuit, which is connected to the timer circuit 8.

The retrigger circuit 27 includes transistors 28 and 29, resistors 30, 32, 33, 34, and 3.
8, a capacitor 35, and diodes 31, 36, and 37. The collector of the transistor 29 is connected to the connection point between the capacitor 19 and the resistor 25, and its emitter is connected to the motor drive relay 10.
It is connected to the connection point between the relay coil 10b and the collector of the transistor 21. diode 3
Anodes 6 and 37 are connected to fixed contacts 2a and 2b of relay 2, respectively. Further, the emitter of the transistor 28 is connected to the voltage detection circuit 5. 49 is a starter detection circuit, which is composed of a logic circuit. Its output side is the timer circuit 8
and is connected to the voltage detection circuit 5. The input side is connected to an ignition switch 39. The starter detection circuit 49 includes transistors 40 and 41, resistors 42, 43, 44, 45 and 4.
6. It consists of a diode 47 connection configuration. The collector of the transistor 40 is connected to one input side of the NAND logic circuit 18 of the timer circuit 8, and is also connected to the DC power supply 26 via a resistor 46.
The emitter of the transistor 41 is connected to the ignition IG terminal of the ignition switch 39, the base to the accessory ACC terminal, and the collector to the connection point between the resistor 11 and the diode 48 of the voltage detection circuit 5 via the diode 47. The battery B terminal of the ignition switch 39 is the DC power supply 2.
It is connected to the positive electrode side of 6.

Next, the operation will be explained based on the first embodiment of the automotive antenna drive control device according to the present invention.

The functions of the first embodiment are, firstly, the normal raising and lowering of the antenna 4 by the on/off action of the radio switch 1, and secondly, the retriggering when the radio switch 1 is continuously switched on/off. The timer circuit 8 is restarted by the circuit 27, and thirdly, when the ignition switch 39 is operated to the starter position while the timer circuit 8 is operating, the timer circuit 8, that is, the antenna 4 is activated.
This can be summarized in the effect of suspending the operation of .

Hereinafter, the effects will be explained in order.

First, a case will be described in which the antenna 4 performs normal lifting and lowering operations due to the on/off action of the radio switch 1.

The antenna 4 is driven up and down by the operation of the timer circuit 8 when the radio switch 1 is turned on or off.
The effect of biasing the antenna 4 toward the upward direction when turned on is illustrated below.

First, when the radio switch 1 is turned on, the relay coil 2d is energized and the movable contact 2c becomes the fixed contact 2.
come into contact with a.

At this time, the motor drive relay 10 is not yet activated, and one end of the rising motor coil 3b is at ground level.

Since the connection point A becomes a low potential, the transistor 14 of the voltage detection circuit 5 becomes conductive, and the connection point B becomes a high potential.

The trigger circuit 6 is therefore activated and shapes the trigger pulse. Here, the delay circuit 9 applies a high-level signal to the other input terminal of the gate circuit 7, and the gate circuit 7 derives a low-level output by inputting the trigger pulse.

Then, the timer circuit 8 is activated and the transistor 21 is made conductive, so that the motor drive relay 10 is activated for a certain period of time and raises the antenna 4.

To be more specific, when the delay circuit 9 has a high level signal, the trigger pulse of the trigger circuit 6 causes the output side of the gate circuit 7 to have a low level signal.
NAND logic circuit 17 derives a high level signal.

Here, in the starter detection circuit 49, when the ignition switch 39 is operated to a position other than the starter position, the transistors 41 and 40 are non-conductive, and a high level signal is derived.

Therefore, the two inputs of the NAND logic circuit 18 are at high level as described above, and the output is a low level signal.

Therefore, one end of the capacitor 19, that is,
The output side of the NAND logic circuit 18 becomes the ground potential, and the capacitor 19 starts charging via the resistor 25. The output side of the NAND logic circuit 20 maintains a high level signal until the charge level of the capacitor 19 exceeds the threshold voltage value of the NAND logic circuit 20.

This holding is achieved by the conduction of the transistor 21.
This is done by feeding back a low level signal to one input terminal of the NAND logic circuit 17 and maintaining the output side of the NAND logic circuit 17 at a high level. Further, when the timer circuit 8 is activated, the capacitor 23 is discharged via the diode 24 and the transistor 21. Therefore, the other input terminal of the gate circuit 7 becomes a low level signal, and the output of the gate circuit 7 derives a high level signal regardless of the level of the one input terminal.

Now, when the charge level of the capacitor 19 reaches a predetermined value, the timer circuit 8 starts the NAND logic circuit 20.
The output side of transistor 21 is inverted to low level and
When the timer circuit 8 is turned off, the timer circuit 8 becomes inactive, and the operation of the timer circuit 8 is completed.

If the antenna motor is currently operating and is locked, when the motor drive relay 10 becomes inactive due to the completion of the operation of the timer circuit 8, the transistor 14 of the voltage detection circuit 5
The trigger circuit 6 outputs a trigger pulse to the gate circuit 7.

However, the capacitor 23 of the delay circuit 9 starts charging via the resistor 22 upon completion of the operation of the timer circuit 8, and this charging voltage is applied to the gate circuit 7.
The gate circuit 7 does not respond to the trigger pulse from the trigger circuit 6 until the threshold voltage value of the NAND logic circuit constituting the gate circuit 7 is reached.

In other words, if the time constant of the delay circuit 9 is set larger than the time constant of the trigger circuit 6, the gate circuit 7 can derive a low level output even if a trigger pulse accompanying the lock is input. do not.

Thus, the timer circuit 8 remains inactive.

In this way, the motor coils 3b and 3d can be energized for only a certain period of time, regardless of whether the antenna motor is in normal operation or locked.

The antenna claw 3f opens the ascending limit switch 3a when the antenna 4 finishes rising, and opens the descending limit switch 3c when the antenna 4 finishes descending, thereby stopping the antenna motor.

Next, the restarting action of the timer circuit 8 by the retrigger circuit 27 when the radio switch 1 is continuously switched on and off will be explained.

The retrigger circuit 27 operates only when the timer circuit 8 is operating. When the movable contact 2c of the relay 2 switches contact due to on/off switching of the radio switch 1, the retrigger circuit 27 detects this state and discharges the capacitor 19 in a short time. When the timer circuit 8 is inactive, the line 1 is connected to the DC power supply 26 via the relay coil 10b and is in a high potential state.

Further, when the timer circuit 8 is activated, the transistor 21 becomes conductive, the line 1 becomes the ground potential, and the trigger circuit 27 is activated.

The retrigger circuit 27 is a fixed contact 2 of the relay 2.
Inputs are introduced from a and 2b, and the timer circuit 8
During operation, one output of diodes 36, 37 is a high level signal and transistor 28 is non-conducting.

That is, the retrigger circuit 27 does not enter the starting position. At this time, turn on radio switch 1.
When switched off, the movable contact 2c undergoes contact switching. Therefore, when switching this contact, the empty
There is a period of time (time during which the movable contact 2c does not contact the fixed contacts 2a, 2b), and this causes the diode 3 to
The output sides of 6 and 37 are low level signals, and the base current of transistor 28 is connected to diode 31 and resistor 3.
0, flows to the transistor 21, and the transistor 2
8 becomes conductive.

Thus, the capacitor 35 is charged and the transistor 29 is made conductive.

Therefore, the capacitor 19 of the timer circuit 8 is
Each time the radio switch 1 is turned on and off, it is rapidly discharged through the transistors 29 and 21, and the timer circuit 8 is restarted, so that the timer circuit 8 has enough time to drive the antenna 4 up and down every time the radio switch 1 is turned on and off. This is ensured by the retrigger circuit 27.

Next, the effect of temporarily stopping the operation of the antenna 4 will be explained.

Now, when the starter motor starts, that is, when the ignition switch 39 is switched to the starter position, the ignition switch 39
The ACC terminal is open, and the power supply voltage is applied to the IG terminal. Thus, the output of the starter detection circuit 49 becomes a low level signal, which is introduced into one input side of the NAND logic circuit 18 of the timer circuit 8. Therefore, if the timer circuit 8 is in operation, the operation of the timer circuit 8 is forcibly stopped. While the low level signal from the starter detection circuit 49 is being introduced to the timer circuit 8, the timer circuit 8 will not be started no matter what signal is introduced to the timer circuit 8. Thus, the antenna 4 stops operating when the starter motor starts. Next, if the start of the starter motor is canceled, the starter detection circuit 49
A high level signal is introduced into the timer circuit 8 from
Timer circuit 8 enters the active state. Then, an output signal is sent from the trigger circuit 6 to start charging the capacitor 19 via the resistor 25, the timer circuit 8 is activated, the transistor 21 becomes conductive, and power is again supplied to the antenna motor.

Next, a second embodiment of the retrigger circuit according to the present invention shown in FIG. 2 will be described. This second embodiment uses the back electromotive force of the antenna motor to operate the retrigger circuit.

The retrigger circuit 27 includes a transistor 50, resistors 51, 52, 53, 54 and 55, capacitors 56, 57, diodes 58, 59 and 60.
It consists of a connection circuit.

Then, at the moment when the antenna motor reverses its rotational direction by turning on and off the radio switch 1, one of the motor coils 3a and 3b induces a back electromotive force, and the diodes 58 and 59 pass a negative voltage.

At this time, the base current of the transistor 50 flows through the resistors 51 and 54 and one of the diodes 58 and 59, and the transistor 50 is turned on.
Therefore, an instantaneous low level signal is introduced into one input side of the NAND logic circuit 18.

As a result, the output side of the NAND logic circuit 18 becomes high level, and the capacitor 19 is rapidly discharged through the diode 61 to the connection line between the DC power supply 26 and the delay circuit 9.

At this time, one input side of the NAND logic circuit 20 introduces a low level signal, so the transistor 2
1 remains conductive.

Thus, by the action of the retrigger circuit 27, the timer circuit 8 is restarted each time the radio switch 1 is turned on or off.

Note that 62 and 63 in the figure are diodes.

Next, FIG. 3 shows a third embodiment of the retrigger circuit according to the present invention.

Since the circuit diagram of the retrigger circuit 27 is almost similar to that of the second embodiment, its main points will be summarized.

At present, the capacitor 19 is being charged via the resistor 25 while the timer circuit 8 is operating. At this time, when the radio switch 1 is turned on and off, the antenna motor reverses its rotational direction, and at that moment one of the motor coils 3a and 3b induces a back electromotive force, and the base current of the transistor 64 flows through the resistor 65 and the transistor. 64 emitters, and diodes 70,7
1, the transistors 64 and 66 become conductive, the differential circuit consisting of the capacitor 67 and the resistor 68 is energized, and the transistor 69 becomes conductive instantly.

Thus, the charge in the capacitor 19 is rapidly discharged.

Therefore, it can control the retrigger function. In the figure, 70, 71, 72 are diodes, 73
is a capacitor, and 74, 75, 76, 77, 78 and 79 are resistors.

Since the automobile antenna drive control device according to the present invention has the above-described configuration and operation, it has the following effects. In other words, by connecting the retrigger circuit to the timer circuit, it is possible to control the restart of the timer circuit when the radio switch is turned on and off, and the antenna stops at an intermediate position of rising and falling when the radio switch is turned on and off. It is possible to eliminate such accidents.

Furthermore, since the retrigger signal is derived by cleverly utilizing the so-called gap time during the switching operation of the movable contact of the relay, the circuit configuration becomes extremely simple. Further, according to the second and third embodiments, the retrigger signal is derived using the negative back electromotive force of the antenna motor, so there are various effects such as no need for a separate signal source for operating the retrigger circuit.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram showing a first embodiment of the automotive antenna drive control device according to the present invention, FIG. 2 is an electric circuit diagram showing a second embodiment of the retrigger circuit according to the present invention, and FIG. It is an electric circuit showing a third embodiment of the retrigger circuit according to the invention. 3...Antenna motor circuit, 4...Antenna,
5... Voltage detection circuit, 8... Timer circuit, 10...
...Motor drive relay, 27...Retrigger circuit,
49...Starter detection circuit, 39...Ignition switch.

Claims (1)

[Scope of utility model registration request] A voltage detection circuit that detects whether or not the antenna motor can be driven, a timer circuit that is activated by the operation of the voltage detection circuit, a motor drive relay that is activated by the output of the timer circuit, and an antenna motor circuit that is driven by the operation of the motor drive relay. 1. A vehicle antenna drive control device comprising: a retrigger circuit connected to the timer circuit in order to derive a retrigger signal to the timer circuit.