JPH021922Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a motor antenna control circuit for a vehicle, and in particular, a motor antenna control circuit for a vehicle that automatically raises and lowers a pole antenna provided on the vehicle body as an antenna for an in-vehicle radio receiver as required. The present invention relates to a motor antenna control circuit.

FIG. 1 is a specific electrical circuit diagram of a conventional vehicle motor antenna control circuit. First, the configuration of a conventional vehicle motor antenna control circuit will be described with reference to FIG. An on-vehicle DC power source 1 such as a battery is connected to a contact 5e of a relay 5, and an ignition switch 2 and a radio 3.
It is connected to a coil 5a of a relay 5 via a radio main switch 4 built in. A contact 5b of the relay 5 is grounded, and contacts 5d and 5f are connected to one end of the reversible motor 6. A contact 5c of the relay 5 is connected to the other end of the reversible motor 6 via a limit switch 7 on the ascending side, and a contact 5g is also connected to the other end of the reversible motor 6 via a limit switch 8 on the descending side. The rising side limit switch 7 is closed when the pole antenna is at the completion position of the pole antenna, that is, at the start position of the pole antenna, and when it is rising and falling.
It is opened at the ascent completion position, that is, the descent start position.
Further, the lower limit switch 8 is closed at the ascent completion position, that is, the descent start position, and during descent and ascent, and is opened at the descent completion position, that is, the ascent start position.

Next, the operation will be explained. When the radio main switch 4 and the ignition switch 2 are closed, the coil 5a of the relay 5 is energized, the contact 5b of the relay 5 is connected to the contact 5, and the contact 5e is connected to the contact 5f. At this time, when the pole antenna (not shown) is lowered, the upward limit switch 7 is closed.
For this purpose, from the DC power supply 1 to the contacts 5e and 5f, the reversible motor 6, the upward limit switch 7, and the contact 5
A direct current flows through the contact point 5b and the contact point 5b.
For this purpose, the reversible motor 6 rotates forward and raises the pole antenna. Conversely, if you open radio main switch 4 or ignition switch 2,
The coil 5a of the relay 5 is no longer energized, the contact 5b is connected to the contact 5d, and the contact 5e is connected to the contact 5.
connected to g. At this time, since the pole antenna is rising, the downward limit switch 8 is closed and the upward limit switch 7 is open. For this purpose, contacts 5e and 5 are connected to the DC power supply 1.
g, lower limit switch 8, reversible motor 6,
A direct current flows through the contacts 5d and 5b. That is, a direct current flows through the reversible motor 6 in the opposite direction to that during the upward movement. For this purpose, the reversible motor 6 reverses and lowers the pole antenna.

In the conventional vehicle motor antenna control circuit constructed as described above, switching between the radio and the tape player is performed by the selection switch 9 connected to the radio main switch 4. For this reason, if the radio main switch 4 or the ignition switch 2 is closed while the selection switch 9 is selecting the tape side contact, the pole antenna will rise as described above. That is, there was a problem in that the pole antenna rose even when the radio was not in operation.

Therefore, it is conceivable to apply a DC voltage to the coil 5a of the relay 5 via the radio side contact of the selection switch 9 so that the pole antenna can be raised or lowered only when the radio is in operation. However, in this case, when the radio side contact is selected with the selection switch 9, the pole antenna rises, and then when the radio main switch 4 and the ignition switch 2 are closed, the selection switch 9 is
When the tape side contact is selected, the pole antenna lowers, and conversely, when the radio side contact is selected, it rises again, which may cause unnecessary lifting and lowering operations to be repeated. There was a problem that the life of the motor 6 was shortened.

Therefore, the main purpose of this invention is to create a vehicle motor that raises the pole antenna only when the radio side contact is selected by the selection switch, and does not raise or lower the pole antenna when the tape side contact is selected. An object of the present invention is to provide an antenna control circuit.

To summarize this invention, in a motor antenna control circuit for a vehicle that raises and lowers a pole antenna by the rotational movement of a reversible motor, a switching means is provided that switches when a radio main switch is closed and a radio side contact is selected by a selection switch. a self-holding relay means that holds itself in response to switching of the switching means; a first backflow prevention element connected between the input of the switching means and the tape side contact of the selection switch; A second backflow prevention element connected between the relay contact of the relay means and the tape side contact of the selection switch, and the self-holding type relay means rotating the reversible motor in one direction in response to self-holding. and a means for raising the pole antenna.

The above objects and other objects and features of the present invention will become clearer from the detailed description given below with reference to the drawings.

FIG. 2 is a specific electrical circuit diagram of one embodiment of this invention. Next, the configuration of an embodiment of this invention will be described with reference to FIG. A DC power supply 1, an ignition switch 2, a radio main switch 4, and a contact 9a of a selection switch 9 are connected in series. The radio side contact 9c of the selection switch 9 is connected to the base of a transistor 19 via a backflow prevention diode 17 and a resistor 18, and is also connected to a contact 10b of a self-holding relay 10 through a backflow prevention diode 14. Connected.
The tape side contact 9b of the selection switch 9 is connected to the connection point between the backflow prevention diode 17 and the resistor 18 through the backflow prevention diode 16, and is connected to the self-holding relay 10 through the backflow prevention diode 15. It is connected to contact 10b. Contact 10c of self-holding relay 10 is connected to the collector of transistor 19 via coil 10a.
The emitter of transistor 19 is grounded. Note that a resistor 13 is connected between the radio side contact 9c of the selection switch 9 and the contact 10c of the self-holding relay 10.
A parallel circuit of the capacitor 12 and the capacitor 12 is connected. These resistors 13 and capacitors 12 are connected to relay 1
0 is provided to operate as a self-holding relay, and the capacitor 12 is provided to operate as a self-holding relay.
0 coil 10a becomes energized, contact 10b
is connected to the contact 10c, and the capacity is selected to provide a self-holdable setting time. Also, resistor 13
is a discharge resistor for completely discharging the charge stored in the capacitor 12 when the radio main switch 4 or the ignition switch 2 is opened and then immediately closed. Further, the coil 5a of the relay 5 is connected in parallel to the coil 10a of the relay 10 and the transistor 19. The contacts 5b to 5g of the relay 5, the reversible motor 6, the ascending limit switch 7, and the descending limit switch 8 are connected in the same manner as in FIG. 1 described above.

Next, the operation will be explained. When the selection switch 9 is switched to the tape side contact 9b side when the pole antenna is completely lowered with both the ignition switch 2 and the radio main switch 4 closed, the transistor 19
The base is a backflow prevention diode 16 and a resistor 18.
A DC voltage from a DC power supply 1 is applied via the DC power supply 1. At this time, since the contact 10b of the relay 10 is open, no DC voltage is applied to the collector of the transistor 19. Therefore, the coil 5a of the relay 5 is not energized. Therefore, even if the selection switch 9 is switched to the tape side contact 9b while the pole antenna is lowered, the pole antenna will not rise or fall.

Next, when the selection switch 9 is switched to the radio side contact 9c, a DC voltage is applied to the base of the transistor 19 via the diode 17 and the resistor 18. At this time, the capacitor 12 is charged, and the charging voltage of the capacitor 12 is applied to the coil of the transistor 19 via the coil 10a of the relay 10. For this reason, transistor 19 becomes conductive and coil 10a becomes conductive, so that contact 10b is connected to 10c. relay 1
0 contact 10b is connected to 10c, the relay 10 enters a self-holding state, and the coil 5 of the relay 5
a also becomes energized. Therefore, the first
Similarly to the figure, the contact 5b is connected to the contact 5c, the contact 5e is connected to the contact 5f, and a DC voltage is applied to the reversible motor 6 via the upward limit switch 7, so that the reversible motor 6 rotates forward and reaches the pole. Raise the antenna. When the pole antenna rises, the rising side limit switch 7 is opened to complete the rising operation.

Next, after the pole antenna has finished rising, even if the selection switch 9 is selected to the tape side contact 9b,
A DC voltage is applied to the base of the transistor 19 via a diode 16 and a resistor 18, and a diode 15 and a contact 1 are also applied to the collector of the transistor 19.
A DC voltage is applied via 0b, 10c and the coil 10a. For this purpose, transistor 1
9 remains conductive, the coil 5a also continues to be energized, and the pole antenna maintains the state in which it has been raised. That is, even if the tape side contact 9b is selected by the selection switch 9 after the pole antenna has completed its ascent, the previous state continues to be maintained.

Next, when the radio main switch 4 or the ignition switch 2 is opened, no DC voltage is applied to the base of the transistor 19, so this transistor 19 becomes non-conductive, and no current flows through the coil 10a of the relay 10. Contact 10b is then opened. For this,
Current no longer flows through the coil 5a of the relay 5,
Contact 5b of relay 5 is connected to 5d and contact 5
e is connected to 5g, current flows in the reverse direction to the reversible motor 6 via the lower limit switch 8,
The pole antenna lowers.

As described above, according to this invention, only when the selection switch is switched from the tape side contact to the radio side contact, the switching means is switched to cause the self-holding relay means to self-hold, and the self-holding relay means is self-holding. In response to the hold, the ball antenna is raised by supplying power to the reversible motor and rotating it in one direction, so even if the pole antenna is raised only when receiving radio, and the selection switch is switched after the raising is completed, The raised state of the pole antenna can be maintained. Further, even if the tape player side contact is selected with the first selection switch, the pole antenna does not rise, and the pole antenna does not rise until the radio side contact is selected thereafter. Furthermore, since the pole antenna always descends when the radio main switch is opened, the pole antenna can be raised and lowered only when necessary. For this reason, the pole antenna does not rise or fall unnecessarily, so the life of the reversible motor can be extended.

[Brief explanation of the drawing]

FIG. 1 is a specific electrical circuit diagram of a conventional vehicle motor antenna control circuit. FIG. 2 is a specific electrical circuit diagram of one embodiment of this invention. In the figure, 1 is a DC power supply, 2 is an ignition switch, 3 is a radio, 4 is a radio main switch, 5 and 10 are relays, 6 is a reversible motor, 7 is an upward limit switch, 8 is a downward limit switch, and 9 is a downward limit switch. Selection switch, 12 is a capacitor,
13 is a resistor, 14 to 17 are backflow prevention diodes, and 19 is a transistor.

Claims (1)

[Claims for Utility Model Registration] (1) A motor antenna control circuit for a vehicle, which is installed in a vehicle on which a radio and a tape player are mounted, and which raises and lowers a pole antenna by the rotational movement of a reversible motor. , a DC power supply, a radio main switch provided in a power supply path from the DC power supply to the radio, and when the radio main switch is closed, power is supplied from the DC power supply to the radio or the tape playback. a selection switch for selecting a device and supplying the electric power; a switching means connected to a radio side contact of the selection switch, supplying electric power in response to selection of the radio side contact, and switching accordingly; , self-holding relay means connected to the output of the switching means and self-holding in response to the switching; a first backflow prevention device connected between the input of the switching means and the tape-side contact of the selection switch; a second backflow prevention element connected between the relay contact of the self-holding relay means and the tape-side contact of the selection switch; and a second backflow prevention element connected to the contact of the self-holding relay means, the contact being and means for supplying power from the DC power supply to the reversible motor to rotate it in one direction in response to the closed position, thereby raising the pole antenna, and switching the selection switch from the tape side contact to the radio side contact. A motor antenna control circuit for a vehicle, characterized in that, after raising the pole antenna, the state is maintained even if the selection switch is switched to a tape side contact. (2) The self-holding relay means is a relay including a contact and a coil connected in series between the output of the switching means and the radio side contact of the selection switch, and the input of the switching means and the radio side contact of the selection switch. 2. The motor antenna control circuit for a vehicle according to claim 1, which includes a parallel circuit of a resistor and a capacitor connected between a coil of a relay and the contact for self-holding the contact.