JPH0628808Y2 - Vehicle antenna expansion and contraction control device - Google Patents

Description

[Detailed description of the device]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle antenna expansion / contraction control device equipped for receiving an in-vehicle radio or the like.

[Prior art]

Conventionally, as a control device for an automobile antenna, for example, a control device disclosed in Japanese Patent Publication No. 57-41066 is known. This is equipped with a voltage detection circuit that detects whether the antenna expansion / contraction motor can be driven, and a timer circuit connected to the output side of this voltage detection circuit via a trigger circuit and a gate circuit. If it is in the state, the timer circuit is not energized to prevent the antenna expansion / contraction motor from burning, and the antenna expansion / contraction motor is prevented from being burned, regardless of whether the antenna expansion / compression motor is locked or unlocked. It is like energizing the motor for expanding and contracting the antenna for a fixed time.

[Problems to be solved by the device]

However, in the above-mentioned conventional example, the antenna can only be automatically stopped at the extension and contraction limit, and the antenna does not automatically contract unless the device using the antenna such as a radio is turned off. Therefore, when the antenna is extended and inadvertently retracted into the garage, the upper part of the antenna interferes with the beam of the garage and breaks the antenna. It is therefore an object of the present invention to provide a vehicle antenna expansion / contraction control device that prevents the antenna from breaking even when the vehicle is retracted in the antenna extension state.

[Means for solving problems]

For this purpose, a vehicle antenna expansion and contraction control device according to the present invention comprises a sensor for detecting an on / off state of a device using an antenna, a reverse sensor for detecting a reverse state of a transmission, and outputting an on signal. In a vehicle antenna having a control unit that automatically outputs a drive command for extending from a contraction limit position to a full extension limit position in response to an ON signal from a sensor of a device used, the control unit is a reverse sensor of the reverse sensor. It is characterized in that it receives a turn-on signal and outputs a drive command to set the antenna at an intermediate extended position where the antenna is lowered for a predetermined time.

[Action]

When the device using the antenna is turned on, the sensor detects it and gives an on signal to the control unit. In response to this ON signal, the control unit automatically outputs a drive command to extend the antenna from the contraction limit position to the full extension limit position. Then, when the car is retracted with the antenna extended,
When the reverse state of the transmission is detected, the reverse sensor outputs an ON signal, and the control unit receives the ON signal from the reverse sensor and lowers the antenna for a predetermined time, driving the antenna to set the stretched state of the antenna to the intermediate stretched position. Output a command.

【Example】

Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings. In FIG. 1, reference numeral 1 is a sensor for detecting an on / off state of a power source of a radio 2 as a device using an antenna, 3 is a reverse sensor for detecting an operation of a reverse gear 4 and outputting an on signal in a reverse state, 2 points A portion 5 surrounded by a chain line is a control unit. The control unit 5 includes an input / output port 6 and a determination circuit 7 configured by, for example, a CPU, a ROM, a RAM, etc., and determining a control operation to be output according to an input from the sensors 1 and 3. Further, reference numerals 8 and 10 are relay coils for switching the relay contacts 9 and 11 of the relay switch inserted in the forward / reverse rotation circuit of the antenna expansion / contraction motor 12, respectively, and are relayed by a drive command in the extension direction from the control unit 5. When the coil 8 is excited, the forward rotation circuit of the antenna expansion / contraction motor 12 is closed, and when the relay coil 10 is excited by the drive command in the contraction direction from the control unit 5, the reverse rotation circuit of the antenna expansion / contraction motor 12 is closed. It is supposed to be done. When both relay coils 8 and 10 are not excited, the relay contacts 9 and 11 are both connected to the ground side and the antenna expansion / contraction motor 12 is stopped. And such an antenna expansion / contraction motor 12 extends an antenna installed in a proper position such as a pillar portion of an automobile by forward rotation,
It is configured so that it contracts by reversing. The determination circuit 7 outputs not only a simple on / off command to the relay coils 8 and 10 but also the relay coils 8 and 10 according to the combination of the expansion / contraction state of the antenna and the signal output states of the sensor 1 and the reverse sensor 3. It also has a timer function to select the energization time. Next, the operation will be described with reference to FIG. 2 based on the above configuration. However, ANT / Low in the figure is the contraction limit of the antenna, ANT / Mid is the intermediate extension position of the antenna,
ANT · Hi indicates each state of the antenna at the full extension limit. First, as shown in step 101, when the sensor 1 detects that the radio 2 is turned on in the ANT / Low state, this signal is input to the control unit 5, and the control unit 5 outputs a drive command in the extension direction. When the relay coil 8 is excited, the forward rotation circuit of the antenna expansion / contraction motor 12 is closed. Then, the antenna expansion / contraction motor 12 rotates for, for example, 7 seconds required for the transition from the ANT / Low to the ANT / Hi state, and the antenna is fully expanded to ANT / Hi (step 10).
2). When shifting from this state to the reverse gear position in order to move the car backward to enter the garage (reverse gear on),
The reverse sensor 3 detects this and inputs an ON signal to the control unit 5, and the relay coil 10 is excited by the drive command in the contraction direction of the control unit 5. As a result, the reversing circuit of the antenna expanding / contracting motor 12 is closed, the antenna expanding / contracting motor 12 is reversely rotated for 2 seconds, and the antenna is ANT / Mid.
The state is set (step 103). In the ANT / Mid state, the normal antenna can be retracted into the garage while its front end is retracted without interfering with an obstacle such as a beam of the garage. Next, when the radio 2 is turned off in the ANT / Mid state, the control unit 5 outputs a drive command in the contraction direction in response to the detection signal of the sensor 1, and the relay coil 10 is excited to drive the antenna expansion / contraction motor 12 in the same manner as described above. The reversing circuit is closed, and the antenna contracts by the reverse rotation of the antenna expansion / contraction motor 12 to become ANT / Low (step 105). Further, when the garage is completed in the state of step 103 and, for example, the reverse gear position is shifted to the neutral position (reverse gear off), the reverse sensor 3 detects this and outputs a signal to the control unit 5, and the relay The antenna expansion / contraction motor 12 is normally rotated, for example, for 4 seconds by closing the forward rotation circuit accompanying the excitation of the coil 8, and the antenna is set to the ANT / Hi state (step 106). When the radio 2 is turned off from this state, the relay coil 10 based on the signal from the sensor 1 is used as described above.
The antenna expansion / contraction motor 12 is rotated in reverse due to the closing of the inversion circuit associated with the excitation of the antenna, and the antenna contracts to ANT / Low (step 107). In the step 102 of ANT · Hi, for example, when the radio 2 is turned off during running, the relay coil 10 is excited by the signal of the sensor 1 for about 7 seconds similarly to step 107, and the antenna contracts based on this and the antenna is contracted. It becomes Low (step 104). In the step 101 of ANT / Low, even if the reverse gear 4 is turned on, there is no output of the drive command from the control unit 5, and the antenna is held in the ANT / Low state (step 108). Although it is rare in actual operation, when the radio 2 is turned on in this state, the sensor 1
The forward rotation circuit is closed by the excitation of the relay coil 8 based on the signal of, and the antenna expansion / contraction motor 12 is normally rotated for 2 seconds so that the antenna is in the ANT / Mid state (step 109).
The antenna will not interfere with the obstacles above it when retracting. Next, when the radio 2 is turned off, the antenna contracts in the same manner as in the case of the above step 103, and AN
It becomes T / Low (step 110).

[Effect of device]

As described above, according to the present invention, even when the vehicle is moved backward with the antenna extended, the reverse sensor detects the reverse state of the transmission and the reverse sensor outputs an ON signal.
The control unit receives the ON signal from the reverse sensor, lowers the antenna for a predetermined time, and outputs a drive command to set the extension / contraction state of the antenna to the intermediate extension position. Even if the antenna is put in, the antenna does not interfere with the obstacles such as the ceiling and the beams of the garage, and it is possible to completely prevent the antenna from being broken.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a vehicle antenna expansion / contraction control device according to an embodiment of the present invention, and FIG. 2 is a flow chart for explaining the operation of the embodiment. 1, 3 ... Sensor, 2 ... Radio, 4 ... Reverse gear, 5 ...
Control unit, 8, 10 ... Relay coil, 9, 11 ... Relay contact,
12 ... Antenna expansion / contraction motor.

Claims (1)

[Scope of utility model registration request] 1. A sensor for detecting an on / off state of a device using an antenna, a reverse sensor for detecting a reverse state of a transmission and outputting an on signal, and an on signal from a sensor for a device using the antenna. In a vehicle antenna having a control unit that automatically outputs a drive command to extend from the contraction limit position to the full extension limit position, the control unit receives the ON signal of the reverse sensor and lowers the antenna for a predetermined time. An expansion / contraction control device for an automobile antenna, which outputs a drive command for setting the intermediate expansion position.