JPH0612845B2 - Motor antenna drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to the control of the operation of an anteta or the like of a television or a radio.

[Prior art]

As a conventional device of this type, there is a motor antenna driving device as disclosed in Japanese Utility Model Laid-Open No. 57-198104.
The antenna expands and contracts in conjunction with turning on and off the radio switch, and a limit switch and a timer are provided as means for stopping the motor when the antenna is fully extended or fully retracted. However, when trying to perform multi-step control such as stopping the antenna in the middle by such means, the mechanical structure becomes complicated by using the limit switch, and the timer has a fluctuation in the rotation speed of the motor. It is difficult to do.

[Object of the Invention]

The present invention has been made in view of the above problems, and a motor antenna capable of digitally performing control when instructing switching of a plurality of operation stages of an antenna and automatically determining a driving direction of the antenna. It is an object to provide a driving device.

[Means for Solving the Problems]

Therefore, the present invention provides a motor for driving an antenna by supplying power, a pulse signal generating means for generating a pulse signal according to the rotation amount of the motor, and a stepwise selection of the stop position of the antenna, Selecting means for outputting a selection signal corresponding to the selection result; counting means for counting pulse signals from the signal generating means to calculate a pulse count value corresponding to the current position of the antenna; Determining means for determining the driving direction of the antenna based on the information signal based on the pulse count value and the selection signal from the selection signal, and controlling the rotation direction of the motor according to the determination result of the determining means. In addition, when the pulse count of the counting means reaches the value corresponding to the selection signal from the selection means,
A motor antenna drive device is provided, which comprises: a control unit that shuts off the power supply to the motor.

[Action effect]

With the above configuration, when the pulse count value corresponding to the current position of the antenna reaches the selected stop position by the control means, it is possible to stop the energization of the motor and stop the motor. There is an excellent effect that the control for instructing the switching can be performed digitally.

Further, the determining means determines the driving direction of the antenna based on the information signal based on the pulse count value calculated by the counting means and the selection signal from the selecting means, and the control means determines the driving direction of the motor according to the determination result. Since the rotation direction is controlled, there is an excellent effect that the driving direction of the antenna can be automatically determined and driven.

〔Example〕

The present invention will be described below with reference to embodiments shown in the drawings. In FIG. 1, 1 is an on-vehicle battery, 2 is a key switch, and is off when the contact 2e is the terminal 2a, and Acc is 22 when the contact 2e is 2b.
Ignition IG at c, Starter ST at 2d
Is. Reference numeral 3 is a radio switch as a switch for instructing the antenna 7 to move up and down, and 4 is a cassette switch. The cassette switch 4 contacts the terminal 4b when the cassette tape is inserted. Reference numeral 5 denotes a full extension / half extension switch which is a selection means, and generates a full extension signal when the contact is closed and a full extension signal when the contact is opened. Reference numeral 6 is an antenna driving motor, and 7 is an antenna rod that expands and contracts by the motor 6, and the rotational force of the motor 6 is transmitted by a clutch (not shown). Reference numeral 8 is a rotation detector as pulse signal generating means that is turned on and off in association with the rotation of the motor 6. Numerals 9 and 10 are presetting up-counters which are counting means, and 10 is effectively used as a down-counter by using a complement of 9. 11
Is a full extension detection logic unit that detects that the antenna is fully extended by the output of the counter 9. For example, if the output of the counter 9 is 10
When it reaches 0, "H" is output. Reference numeral 12 denotes a half-stretching detection logic unit that detects that the antenna is half-stretched, and outputs "H" when the output of the counter 9 reaches 50, for example. Reference numeral 13 is a digital comparator corresponding to a determination means for detecting whether the antenna is half extension or more or less than half extension, for example, a counter 9
Output 51 or more, "H" is output. Reference numeral 14 denotes a logic unit for detecting the total contraction of the antenna, which outputs "H" when the count value of the counter 10 is 0 and all outputs are "H". Reference numerals 15, 16 and 17 are differentiating circuits, and 15 generates an "H" signal for a certain period of time when an antenna rising signal is generated, 16 is an antenna falling signal, and 17 is both on and off of the changeover switch 5. 18 is a clock oscillator, 19
Is a counter. The counter 19 is reset by either the pulse of the rotation detector 8 or the differentiator 15, 16, 17. If all this is not entered, the counter 19
Since the reset signal is not input, the clock of the oscillator 18 is counted and "H" is output after a fixed time. Two
Data transfer units 0 and 21 are counters 9 and 10, respectively.
When the control signal of "1" becomes "H", the data is inverted and transferred. Therefore, the data transfer unit 20 inverts and transfers the data of the counter 9 to the counter 10 when the antenna moves up, and the data transfer unit 21 transfers the data to the counter 1 when the antenna moves down.
The data of 0 is inverted and transferred to the counter 9. 22, 2
4 is a transistor, 23 and 25 are this transistor 2
Relays controlled by 2 and 24 have their antennas raised by the operation of the relay 23 and lowered by the operation of the relay 25. The transistors 22 and 24 and the logic circuit 6
1, 62, 63, 64, 65, 66 and 67 correspond to control means.

FIG. 2 shows an example of the rotation detector 8 mounted in the motor antenna. The contacts 8a and 8b of 8 are turned on and off by a cam 26a provided on the gear 6 that rotates in association with the rotation of the motor 6. .

The logic unit 100 shown in FIG.
It is composed of C, a small-scale microcomputer, or the like.

Next, the operation of the above configuration will be described. First, the key switch 2 is in the position of 2b or 2c which is Acc or IG, the radio switch 3 is turned on, and the cassette switch is set to 4
In the case of a, if the antenna is fully contracted, the digital comparator 13 outputs "L" and the terminal 200 becomes "H".
Since both terminals 201 and 202 are "L", terminal 2
03 also becomes "L", and the terminal 204 becomes "H". Then, the counter 19 is reset by the pulse of the differentiator 15, and the output of the counter 19 becomes "L", so that 205 becomes "H". Therefore, the transistor 22 is driven, the relay 23 is actuated, and the motor 6 rotates to the rising side. When the motor 6 rotates, the rotation detector 8 generates a pulse, and the counter 9 counts this pulse.

Now, when the changeover switch 5 is off and the full extension signal is generated, the terminal 202 remains "L" and the output of the half extension detection logic unit 12 is ignored. When the motor 6 rotates and the antenna rod 7 extends, the count value of the counter 9 eventually becomes 1
Reaches 00. At this time, the full extension detection logic unit 11 outputs "H", the terminal 201 becomes "H", the terminal 204 becomes "L", the terminal 205 also becomes "L", the transistor 22 is turned off, and the motor 6 is stopped. Further, since the terminal 203 also becomes "H", the input of the counter 9 becomes "L" and the pulse of the detector 8 cannot be received thereafter. Therefore, the extension of the antenna is stopped. In addition, the terminal 20
Since 0 is “H”, only 20 of the data transfer units 20 and 21 can be transferred, and the count value of the counter 9 is always inverted and transferred to the counter 10. Therefore, if the counter 9 is stopped at 100 after antenna extension, the counter 10 has a count value of -100.

Next, when the key switch 2 or the radio switch 3 is turned off, the terminal 200 becomes "L" and the counter 8 is connected to the detector 8
The pulse from is accepted. Since the logic unit 14 outputs "H" when the count values of the counter 10 are all "H", in other words, equivalently 0, it outputs "L" when the antenna is not fully contracted. Therefore, the terminal 207 becomes "H", the counter 19 is reset by the output of the differentiator 16 and its output also becomes "L", the terminal 208 becomes "H", the transistor 24 is driven, and the relay 25 operates, The motor 6 rotates to the antenna shortening side.

Thus, when the antenna rod continues to be shortened, the count value of the counter 10 becomes -100, but eventually becomes 0, and all outputs become "H", and the logic unit 14 outputs "H". Then, the terminals 207 and 208 become "L", the transistor 24 is turned off, and the motor 6 stops. And
The input of the counter 10 is disregarded, and the counter 10 maintains the output "H", so that the antenna is fully contracted to maintain the stop. While the antenna is being shortened, 21 of the data transfer units 20 and 21 can be transferred, and the count value of the counter 10 is inverted and transferred to the counter 9. Therefore, for example, counter 1
If all 0s are "H", all counters 9 are "L"
(0).

Next, when the radio switch 3 is turned on with the changeover switch 5 turned on, the terminal 203 is controlled by the output of the half extension detection logic unit 12. Therefore, when the antenna is extended and the data of the counter 9 becomes 50, for example, the output of the half extension detection logic unit 12 becomes H, the terminal 203 becomes H, the terminals 204 and 205 become L, and the transistor 22 is turned off. To do. Therefore, the antenna stops in the half-extended state.

Here, the operation when the changeover switch 5 is turned on while the antenna is in a fully extended state and is stopped will be described. In this state, the digital comparator 13 outputs "H", and when the changeover switch 5 is closed, the terminal 209 becomes "L".
Therefore, although the radio switch 3 is turned on, the terminal 200 becomes "L", and the antenna starts to be shortened by the above-described antenna shortening operation. Then, from the count value inverted and transferred from the counter 10, the content of the counter 9 is 50
Then, the output of the digital comparator 13 becomes "L" and the terminal 200 returns to "H". However, at this time, the half extension detection logic unit 12 is "H", and 203 is also "H". Therefore, since the subsequent input of the counter 9 is accepted and the rotation of the motor 6 is stopped, the antenna is half extended. Stop in the state.

Further, if the changeover switch 5 is turned off from this state, the terminals 202 and 203 are set to "L", so that the antenna is extended, and when the full extension detection logic unit 11 becomes "H", the antenna is stopped there.

Next, the operation of the counter 19 will be described. When the motor 6 is locked for some reason, or when the signal from the detector 8 is interrupted due to wire breakage or the like, the motor may have a lock current flow or a rotation current. The counter 19 is provided to prevent this, and is reset by the outputs of the differentiators 15, 16 and 17 at the time of inputting an expansion / shortening signal or at the time of turning on / off the changeover switch 5, and then the detector 8 for a fixed time. If the pulse of is not input,
Eventually "H" is output. When the counter 10 outputs H, regardless of the states of the terminals 204 and 207,
Since both the terminals 205 and 208 become "L", the transistors 22 and 24 remain off, and at that time, the power supply to the motor 6 is stopped. Next, the energization is reunited after the output of any of the differentiators 15, 16, 17 is output again and the count 19 is reset.

Also, insert the cassette tape and set the cassette switch 4 to 4
When it comes to side b, it is prohibited so that it will not descend even if the radio is turned off by the input from 4b. Also, when the key switch 2 is ST, Acc is cut off and the radio is cut off.
The logic of G "H" and Acc "L" is taken, and the terminal 210 becomes "H", so that the antenna is also prohibited from descending.

In the above embodiment, the changeover switch 5 is applied for the control of half extension and full extension, but the extension state of the antenna may be controlled not only in two stages but also in multiple stages. That is, in the embodiment shown in FIG. 3, four stages of switching are possible. Where 12a
For example, the counter 9 outputs "H" at 70, and 13a outputs "H" at 71 or more. And 12b, 13b
Are 50, 51 or more, 12c, 13c are 30, 3 respectively
When it is 1 or more, "H" is output. As a result, by connecting the changeover switch 5 to either one, the antenna stops at the corresponding length. Moreover, if the change-over switch 5 is synchronized with the channel of the television installed in the vehicle, the length can be automatically adjusted according to the frequency of the television power supply.

Next, another embodiment in which a manual function is added to the automatic function in the above embodiment will be described.

FIG. 4 is a circuit diagram of another embodiment. In FIG. 4, 30 is an auto manual changeover switch, which is 30a.
Connected with the automatic operation described in the above embodiment, 30b
The manual operation described in the present embodiment is performed.

The manual switches 40 and 50 are interlocked with the up / down changeover switches, and shorten when the contacts are connected to 40a and 50a (shortened position), and expand when they are connected to 40c and 50c (extended position). And the contact is 40
When connected to b and 50b (neutral position), 50b is contactless and 40b is connected to the terminal 4b of the cassette switch 4.

Here, for example, when the user wants to stop the antenna 7 at a position other than the stop positions set by the full extension detection logic unit 11 and the half extension detection logic unit 12, the manual operation is selected by the automatic manual changeover switch 30. Then, the antenna 7 is shortened or extended by the manual switches 40 and 50. Then, when the antenna 7 reaches the desired stop position, the manual switches 40 and 50 are set to the neutral position so that the contact point 50b is not connected and the contact point 40b is connected to the terminal 4b of the cassette switch 4. Since the operation is the same as when the antenna is put in, the antenna 7 can be stopped at the time of setting. The connection shown in FIG. 4 may be formed by a logic circuit inside the logic unit 100.

In addition to the embodiment shown in FIG. 2, a photointerrupter, a photoreflector, a magnet and a reed switch, a magnet and a Hall element, a magnetoresistive element, etc. may be used as a rotation detecting method.

The position of the antenna can be detected directly from the movement of the antenna instead of the rotation of the motor.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is a perspective view of a rotation detector, and FIGS. 3 and 4 are other embodiments of the present invention. 2 ... Key switch, 3 ... Radio switch, 5 ... Changeover switch, 6 ... Motor, 7 ... Antenna rod, 8
...... Rotation detector, 18 ... Oscillator, 19 ... Counter.

Claims (1)

[Claims] 1. An antenna (7) for supplying power
A motor (6) for driving the motor, a pulse signal generating means (8) for generating a pulse signal according to the rotation amount of the motor (6), a switching means (3) for switching the operation and stop of the wireless device, The selection means (5) for selecting the stop position of the antenna (7) stepwise, and the pulse signals from the pulse signal generation means (8) are counted according to the rotation direction of the motor, and the antenna (7). Counting means (9, 10) for calculating the pulse count value corresponding to the present position of the pulse, the pulse count value calculated by the counting means (9, 10), and the stop selected by the selection stage (5). First judging means (1) for judging the rotation direction of the motor (6) by comparing the set value corresponding to the position and the comparison result.
1, 12, 13, 14, 68) and the switching means (3) indicate the operation of the wireless device, the rotation direction of the motor (6) is determined by the first determining means (11, 12, 13, 14, 68) and the switching means (3) indicates that the wireless device is not operating, the rotation direction of the motor (6) is the antenna (7). ) Is the "total reduction position", and the motor (6) is energized so that the rotation direction is in accordance with the determination result of the second determination means (69). At the same time, the pulse count value of the counting means (9, 10) is selected by the selection means (5).
The control means (22, 24, 61, 62, 63, 64, 65, 6) for interrupting the energization of the motor (6) when the set value corresponding to the stop position selected by is reached.
6, 67), and a motor antenna drive device characterized by being provided.