JPH061846B2 - Control device for vehicle antenna - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle antenna control device that is mounted on a vehicle and is driven to extend and retract, and the antenna is driven to an intermediate position.

[Conventional technology]

Conventionally, for the purpose of preventing damage to the vehicle antenna, tuning the antenna length to the reception wavelength, and the like, there is one that drives the vehicle antenna to not only the fully extended position and the fully retracted position but also an intermediate position between them. Are known. When it is instructed to stop this antenna at the intermediate position, select whether to perform the shortening operation from the fully extended position and stop at the intermediate position or the extended operation from the fully retracted position and stop at the intermediate position. Need to drive.

For example, in Japanese Utility Model Laid-Open No. 60-169908, the sliding contact that opens at the intermediate position of the antenna is closed to the first contact when fully extended from this intermediate position, and the first contact when fully extended. Two contacts are configured to be closed, and these contacts select the driving direction of the antenna when the intermediate position is designated.

[Problems to be solved by the invention]

However, in this conventional technique, the detection of the intermediate position and the selection of the driving direction when the intermediate position is supported are performed by the two sets of contacts, and the control device for the vehicle antenna can be downsized. It becomes an obstacle.

In addition, the provision of a large number of contacts may pose a problem in terms of durability and reliability of the vehicle antenna control device in consideration of wear of the contacts.

Therefore, in view of these problems, the present invention controls a vehicle antenna capable of accurately selecting the rotation direction when the driving to the intermediate position is instructed by only detecting the intermediate position of the antenna. The purpose is to provide a device.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention comprises a motor as shown in FIG. 1 and drive means for switching the rotation direction of the motor, and an antenna mounted on a vehicle is expanded and contracted by reversing the operation of the motor. In a control device for a vehicle antenna to be driven, a first command means for generating a first drive signal for rotating the motor in a first direction, and a second drive signal for rotating the motor in a second direction. Second detecting means for generating, a detecting means for detecting that the antenna is expanded / contracted to a predetermined intermediate position, and when the intermediate position is detected under the first command signal, And a third command for driving the antenna to the intermediate position when the intermediate position is detected under the second command signal. Third to generate a signal From the command means and from the generation of the third command signal to the detection of the intermediate position, depending on the first storage state or the second storage state of the storage means, respectively. An intermediate drive unit for generating the second command signal or the first command signal is used.

[Action]

According to the configuration of the present invention, when the antenna passes through the intermediate position in the process of rotating the motor in the first direction or in the process of rotating in the second direction, the storage means M6 stores the antenna according to the operating direction. The storage state is switched between the first storage state and the second storage state.

Then, when the storage means M6 is in the first storage state by the detection drive means M8 until the drive to the intermediate position is commanded by the third command means M7 and until the intermediate position is detected by the detection means M5. When the second command signal for rotating the motor in the second direction is output and the storage means M6 is in the second storage state, the first rotation of the motor in the first direction is performed.
Command signal is output.

As a result, the rotation direction of the motor when the antenna is driven to the predetermined intermediate position is opposite to the rotation direction when the antenna passed the intermediate position immediately before.

〔The invention's effect〕

As described above, according to the configuration and operation of the present invention, each time the antenna passes through the intermediate position, the rotation direction of the motor at that time is stored, and when the intermediate position is commanded, this storage and Since the motor is driven in the opposite rotation direction, it is possible to accurately select the rotation direction of the motor when the drive to the intermediate position is instructed only by providing the means for detecting the intermediate position of the antenna.

〔Example〕

 Examples to which the present invention is applied will be described below.

In this embodiment, a rod antenna mounted on a vehicle is driven by a motor at three positions of fully extended, intermediate and fully retracted.

First, the configuration of this embodiment will be described.

FIG. 2 is a circuit diagram of this embodiment.

10 is a battery, 20 is a key switch, 30 is a radio switch, 40 is an antenna switch, 50 is a control circuit, 6
Reference numeral 0 is an antenna motor, 70 is a rod antenna, and 80 is a limit switch. The movable contact of the key switch 10 is operated by an occupant, and the radio switch 30 has a movable contact 3 in association with the operation of the stereo and the stop of the radio.
Closed to the 0b side, the antenna switch 40 is operated by the occupant. Further, the limit switch 80 opens only at each fixed position, and for example, the FULL limit switch 80
“A” opens its contact at the fully extended position of the rod antenna 70, and is normally closed at other positions.

The control circuit 50 includes relays 501 and 502 that switch the energization direction of the motor 60, transistors 503 and 504 that control the energization of these relays, and a power supply circuit 505 that supplies power to a logic circuit described below.

The signals from the AND gates 507 and 508 are input to the OR gate 506 that turns on the transistor 503, and the AND gate 507 inputs the signals to the AND gate 507.
10 and the non-inverted output Q of the RS flip-flop 509 are input. On the other hand, the signals of the AND gates 514 and 515 are input to the OR gate 513 that turns on the transistor 504, and the AND gate 514 and the RS flip-flop 50 are input to the AND gate 514.
The signal with the inverted output of 9 is input.

The signal of the AND gate 512 is input to the S (set) terminal of the RS flip-flop 509, and the signals of the AND gate 515 and the HALF limit switch 80b are input to the AND gate 512. Further, the signal of the AND gate 511 is input to the R (reset) terminal, and the AND gate 511 receives the signal of the AND gate 508 and the H gate.
A signal from the ALF limit switch 80b is input.

Here, the AND gate 508 outputs a signal for fully extending the antenna 70, and the AND gate 510 outputs the antenna 70.
Outputs a signal to drive the AND gate 51 to an intermediate position.
Reference numeral 5 outputs a signal for completely retracting the antenna 70.

AND gate 5 is a condition for fully extending the antenna 70.
The signal of the timer circuit 522, the signal of the FULL contact 40a of the antenna switch 40, and the inverted signal of the FULL limit switch 80a are input to 08.

AND gate 5 is used as a condition for completely retracting the antenna 70.
The signal of the delay circuit 516, the signal of the timer circuit 517, and the inverted signal of the DOWN limit switch 80c are input to 15.

As a condition for moving the antenna 70 to the intermediate position, the timer circuit 522, the signal of the HALF contact 40b of the antenna switch 40, and the inverted signal of the HALF limit switch 80b are input to the AND gate 510.

The delay circuit 516 and the timer 517 receive the signal from the OR gate 518, and the OR gate 518 receives the signals from the OR gate 521 and the AND gate 519. On the other hand, the timer circuit 522 has an OR gate 523.
Signal is input.

The signal from the IG contact 20b of the key switch 20 and the inverted signal from the ACC contact 20c are input to the AND gate 519, and the ST (starter) contact 20 of the key switch 40 is input.
It acts to prohibit the antenna from descending when it is inserted into a. Further, the OR gate 521 has an S of the radio switch 30.
HA of (stereo) contact 30b and antenna switch 40
The signals of the LF contact 40b and the FULL contact 40a are input, and the OR gate 523 receives the H of the antenna switch 40.
The signals from the ALF contact 40b and the FULL contact 40a are input.

The timer circuit 522 outputs the H level signal for T ₁ (seconds) after the H level signal is input, and the timer circuit 517 outputs the L level signal (hereinafter simply referred to as “L”).
H level signal is output for T ₂ (seconds) after is input.

Further, the delay circuit 516 delays the inversion of the input signal from the H level to the L level for T _D (seconds), and this T _D (seconds)
During the period, an H level signal (hereinafter simply referred to as "H") is output.

The power supply circuit 505 inputs signals from the IG contact 20b and the ACC contact 20c of the key switch 20 via the OR gate 520, and supplies power to the above logic circuit when the key switch 20 is closed to these contacts. With supply
It is equipped with a function to prevent power interruption while the antenna is being driven.

The antenna switch 40 generates a signal when the radio switch 30 is closed to the R (radio) contact 30a, and the radio switch 30 is the ACC of the key switch 20.
Power is supplied from the contact 20c.

Next, the operation of this embodiment will be described with reference to FIG.
From the state shown in FIG. 2 (the rod antenna 70 is assumed to be fully contracted), the ACC contact 20c of the key switch 20 is closed.

(B) When the antenna switch 40 is closed to the FULL contact 40a, the output of the air gate 521 becomes "H" and the output of the OR gate 518 also becomes "H", so the delay and timer circuits 516 and 517 are stopped (reset). Therefore, "L" is output. Also, the timer circuit 5
The output of 22 becomes "H" and the output of the AND gate 508 becomes "H" because the FULL limit switch 80a is ON. Therefore, the output of the OR gate 506 becomes "H", the transistor 503 turns ON, and the relay 5
The contact of 01 moves to the ON side.
Directional current flows. When the motor rotates, the DOWN limit switch 80c turns ON, and when the motor further rotates, the HALF limit switch 80b turns OFF at the intermediate point.

At this time, the output of the AND gate 511 becomes “H”, the RS flip-flop 509 is reset,
Q becomes "L" and becomes "H". Further, the motor 60 rotates and the HALF limit switch 80b turns on again.

When the upper end is reached, the FULL limit switch 80
a turns off. This signal causes the AND gate 508.
Output becomes "L", the output of the OR gate 506 becomes "L", and both the transistor 503 and the relay 501 are turned off.
And the motor 60 stops.

(B) Next, the OFF contact 40 of the antenna switch 40
Closing the c, output becomes "L" of the OR gate 521, Do and the output is also "L" of the OR gate 518 connexion, from the falling delay circuit 516 _{T D} s (0.2 to 2
The timer circuit 517 outputs "H" for about ₂ seconds (about several seconds to several tens of seconds). Therefore,
The AND gate 515 outputs “H” from T _D seconds to T ₂ seconds later, the output of the OR gate 513 is “H”, the transistor 504 is ON, the contact of the relay 502 is ON side, and the motor 60 is not connected. It is energized in the DOWN direction. DO
When the motor rotates in the WN direction, the FULL limit switch 80a is turned on and the HALF limit switch 80b is turned off once at the intermediate point.

At this time, the output of the AND gate 512 becomes "H",
The RS flip-flop 509 is set so that Q becomes "H" and Q becomes "L".

When the motor 60 further rotates, the HALF limit switch 80b is turned on again, the DOWN limit switch 80c is turned off, the output of the AND gate 515 is “L”, the OR gate 513 is also “L”, the transistor 504 is OFF, and the relay 502 Is turned off and the motor 60 is stopped.

(C) Next, the HALF contact 40 of the antenna switch 40
When b is closed, the output of the OR gate 521 becomes "H", and the prohibition acts on the DOWN side (similar to the operation of (a) above). On the other hand, the output of the AND gate 510 is “H”
Then, when the motor 60 rotates in the DOWN direction by the operation of (b) above, the RS flip-flop 5
Since Q of 09 is "H" and "L", the output of the AND gate 507 is "H", and the OR gate 506
Also becomes "H", and the motor 60 rotates in the UP direction in the same manner as the above-mentioned operation (a). Eventually, HAL
When the F limit switch 80b is turned off, the output of the AND gate 510 becomes "L", so the OR gate 506
Is "L", transistor 503 is OFF, relay 501
Turns off and the motor 60 stops.

(D) Further, the FULL contact 4 of the antenna switch 40
When 0a is closed, the output of the AND gate 508 becomes "H", and the antenna is fully extended in the same manner as the above-mentioned operation (a).

When the FULL contact 40a is closed, the HALF limit switch 80b is off, so the output of the AND gate 511 becomes "H", the RS flip-flop 509 is reset, and Q is "L", "". H ".

(E) Next, the HALF of the antenna switch 40
When the contact 40b is closed, the output of the AND gate 510 becomes "H", and the output of the AND gate 514 becomes "H" because the RS flip-flop 509 is "H" due to the operation of (d) above. , The output of the OR gate 513 becomes “H”, and the motor 60 is energized to the DOWN side to rotate in the same manner as the operation of (B) described above. Eventually, H
When the ALF limit switch 80b is turned off, the output of the undelegate 510 becomes "L", the motor stops, and the antenna 70 stops at the intermediate position.

(F) Next, the OFF contact 40 of the antenna switch 40
When c is closed or the key switch 20 is closed to the OFF contact 20d, the OR gate 521 becomes "L", the OR gate 51.
8 becomes "L", the motor 60 is energized to rotate on the DOWN side in the same manner as in the operation of (B) described above, and the antenna 70 is fully retracted.

In this operation, when the AND gate 515 outputs "H", the HALF limit switch 80b is still OF.
Since it is F, the AND gate 512 outputs "H", the flip-flop 509 is set, and Q is "H",
Is "L".

(G) After the operation of (C) above, the antenna switch 40
To the OFF contact 40c or turn the key switch 20 to O
Even when it is closed to the FF contact 20d, the RS flip-flop 509 is set in the same manner as the operation of (f) described above,
The antenna 70 is fully contracted.

(H) Further, even when the antenna switch 40 is closed to the FULL contact 40a after the operation of the above (e), the RS flip-flop 509 is operated similarly to the operation of the above (d).
Is reset and the antenna 70 is fully extended.

As described above, in this embodiment, when driven to the fully extended and fully retracted states in each of the ascending operation and the descending operation, the RS flip-flop is reset and set at the intermediate position of the antenna, and It prepares for driving to the intermediate position by the descending operation and the ascending operation.

Thus, by simply selecting the intermediate position with the antenna switch, the rotating direction of the motor 60 is selected from the fully extended position to the intermediate position by the descending operation, and from the fully retracted position to the intermediate position by the ascending operation, and the antenna is selected. Can be driven.

In the above-described embodiment, limit switches are also provided at the fully extended and fully retracted positions, and the motor is stopped at these positions by opening these switches. May be detected to stop the motor.

Further, in the above-described embodiment, the antenna is driven at three positions of full extension, intermediate and full contraction, but it may be configured to drive the antenna at a plurality of intermediate positions. The configuration according to the present invention may be provided for each intermediate position.

Further, the detection means for detecting the intermediate position is not limited to the one using the limit switch, and a photo coupler or the like may be used as appropriate.

[Brief description of drawings]

FIG. 1 is a block diagram of the present invention, FIG. 2 is a circuit diagram of an embodiment to which the present invention is applied, and FIG. 3 is a time chart for explaining the operation of the embodiment. M1 ... Motor, M2 ... Driving means, M3 ... First command means, M4 ... Fourth command means, M5 ... Detecting means, M6 ...
Storage means, M7 ... Third command means, M8 ... Intermediate driving means.

Claims (1)

[Claims] 1. A vehicle antenna control device comprising a motor and driving means for changing the rotation direction of the motor, wherein the antenna mounted on the vehicle is driven to extend and retract by reversing the operation of the motor. A first command means for generating a first drive signal for rotating the motor in a first direction; a second command means for generating a second drive signal for rotating the motor in a second direction; Detection means for detecting expansion and contraction to an intermediate position of the second command signal, and a first storage state when the intermediate position is detected under the first command signal And a storage unit that is in a second storage state when the intermediate position is detected; a third command unit that generates a third command signal that drives the antenna to the intermediate position; Command signal is generated Until the intermediate position is detected, the second command signal or the first command signal is generated in accordance with the first storage state or the second storage state of the storage means, respectively. A vehicle antenna control device comprising: an intermediate drive unit.