JPS6043903A - Motor-driven antenna device - Google Patents

Abstract

PURPOSE:To perform digitally the control when the operating steps of an antenna are indicated in plural switching ways by detecting the position of the antenna as a pulse signal and driving a motor until a value counting said pulse signal reaches a value corresponding to a set command. CONSTITUTION:A position detecting means 8 detecting the moving position of the antenna 7 driven by the motor 6 and generating a pulse signal, a changeover setting means 5 setting and indicating the operating step of the antenna 7, a control circuit section 100, and forward/reverse switches 23, 25 are provided. Through the constitution above, in turning on a key switch 2 and a radio switch 3 or the like, the motor 6 is forwarded or reversed depending on the setting indication of the changeover setting means 4 and the present position of the antenna 7 and the antenna 7 is prolonged or shrinked. The number of revolutions of the motor 6 is detected by the position detecting means 8 as a pulse signal, which is counted by a counter 19. When the position of the antenna 7 is equal to the setting indication, the driving of the motor 6 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the control of the operation of television and radio antennas.

[Prior art]

As a conventional device of this type, there is a motor antenna drive device as shown in Japanese Utility Model Application Publication No. 57-198104. The antenna expands and contracts in conjunction with the radio switch being turned on and off, and a limit switch and timer are provided as means to stop the motor when the antenna is fully engaged or fully retracted. However, if you try to perform multi-step control such as stopping the antenna in the middle using such a method, using a limit switch would complicate the mechanical structure, and using a timer would require accurate control because of fluctuations in the motor's rotational speed. It's difficult to do.

[Purpose of the invention]

In view of the above problems, the present invention detects the position of the antenna as a pulse signal, and when the counted value of this pulse signal reaches a value corresponding to a given setting instruction, the current to the motor is cut off. The object of the present invention is to provide a motor antenna drive device that can digitally control when instructing to switch the antenna operation stage to a plurality of stages.

〔Example〕

The present invention will be described below with reference to embodiments shown in the drawings.

In Fig. 1, 1 is a car battery, 2 is a keychain, and when contact 2e is terminal 2a, it is off, and when it is 2b, it is ACC.
, 22C when the ignition IC.

When it is 2d, it is the starter ST. 3 is -L of antenna 7
A radio switch serves as a switch for commanding raising and lowering, and 4 is a cassette switch. The cassette switch 4 comes into contact with the terminal 4b when a cassette tape is inserted. 5
is an all-incident selector switch which is a switching setting means, and when the contact is closed, an all-incident signal is generated, and when it is opened, an incident signal is generated. 6 is an antenna drive motor, and 7 is an antenna rod that extends and contracts by the motor 6, and the rotational force of the motor 6 is transmitted through a clutch (not shown). Reference numeral 8 denotes a rotation detector as a position detection means that turns on and off in conjunction with the rotation of the motor 6. 9.10 is a presetable up counter which is a counting means, and 1
By using 9's complement, 0 is effectively used as a down counter. Reference numeral 11 denotes a complete detection logic unit which detects that all antennas have been detected based on the output of the counter 9. For example, when the output of the counter 9 reaches 100, it outputs "H".

Reference numeral 12 denotes an incident detection logic unit that detects that an incident has occurred in the antenna. For example, when the output of the counter 9 reaches 50, it becomes "H".
Output. 13 is a digital comparator that detects whether the antenna is above or below the raw material; for example, the counter 9
When the output is 51 or more, it outputs "H". 14 is a logic unit that detects full contraction of the antenna, and outputs "H" when the count value of counter 10 is O and all outputs are "H", for example. 15, 16, and 17 are differentiating circuits, 15 generates an antenna up signal, 1G generates an antenna down signal, and 17 generates an "H" signal for a certain period of time when the selector switch 5 is both on and off. 18 is a clock oscillator, 19
is a counter. The counter 19 is reset either by a pulse of the rotation detector 8 or by the differentiator 15, 16, 17. If all of these are not input, counter 19
Since the reset signal is not input to the oscillator 18, it counts the clock of the oscillator 18 and outputs "H" after a certain period of time.2
0.21 is a data transfer section, and counters 9. 】O
When the control signal becomes 'H', the data is inverted and transferred.Therefore, the data transfer section 20 inverts and transfers the data of the counter 9 to the counter 10 when the antenna goes up, and the data transfer section 21 inverts and transfers the data of the counter 9 to the counter 10 when the antenna goes up. sometimes counter 1
The data of 0 is inverted and transferred to the counter 9. 22゜2
4 is 1 transistor, 23.25 is this transistor 22
．． The antenna is controlled by a relay 24, and when the relay 23 is activated, the antenna goes up, and when the relay 25 is activated, the antenna goes down.

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

Note that the logic section 100 in FIG. 1 is, for example, a custom I
This is a control means composed of a small-scale microcomputer, etc.

Next, the operation of the above configuration will be explained. First, key switch 2 is in position 2b or 2C (ACC or IG), radio switch 3 is on, and cassette switch is in position 4.
At the time of a, if the antenna is fully compressed, the digital comparator 13 outputs "L" and the terminal 200 becomes "H".

Also, since terminals 201 and 202 are both “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 205 becomes "H".
becomes. Transistor 22 is therefore driven and relay 2
3 is activated, and the motor 6 rotates in the upward direction. When the motor 6 rotates, a rotation detector 8 generates pulses, and a counter 9 counts the pulses.

Now, if the selector switch 5 is off and the all-case signal is being generated, the terminal 202 remains "L" and the incident detection logic unit 1
The output of 2 is ignored. When the motor 6 rotates and the antenna rod 7 extends, the count value of the counter 9 will eventually reach 10.
reaches 0. At this time, the all-case detection logic unit 11 outputs "H", the terminal 201 becomes "H", the terminal 204 becomes "L",
Furthermore, the terminal 205 also becomes "L", the transistor 22 is turned off, and the motor 6 is stopped. In addition, since the terminal 203 also becomes "H", the input of the counter 9 becomes "L" and from then on the detector 8
pulses cannot be accepted. Therefore, the antenna extension stops. Note that the terminal 200 is “H” while the antenna is being extended.
'', only 20 of the data transfer units 20.21 is enabled for transfer, and the count value of counter 9 is always inverted and transferred to counter 10. Therefore, after the antenna is extended, counter 9 stops at 100. , the counter lO is -10
The count value is 0.

Next, when the key switch 2 or radio switch 3 is turned off, the terminal 200 becomes "L" and the detector 8
Pulses from can be accepted.

Since the logic unit 14 outputs "H" when all the counts of the counter 10 are "H", in other words isometrically O, it outputs 'L' when the antenna is not fully compressed. Therefore, the terminal 207 becomes H'', the counter 19 is reset by the output of the differentiator 16, and its output also becomes L'', so the terminal 207 becomes H''.
08 becomes H'', the transistor 24 is driven, the relay 25 is activated, and the motor 6 is rotated to the antenna shortening side.

In this way, as the antenna expansion period continues to shorten, the counter 10's count value changes from -100 to 0, all outputs become "H", and the logic section 14 outputs "H". Then, The terminals 207 and 208 become "L", turning off the transistor 24 and stopping the motor 6.Then, the input to the counter 10 is ignored, and the counter 10 outputs "H".
'', the antenna is fully contracted and remains stationary.

When the antenna is shortened, two of the data transfer units 20 and 21
1 becomes transferable, and the count value of counter lO is inverted and transferred to counter 9. Therefore, for example, if all counters 10 are "H", all counters 9 are "L" (0).
becomes.

Next, when the radio switch 3 is turned on while the selector switch 5 is turned on, the terminal 203 is controlled by the output of the incident detection logic section 12.

Therefore, when the antenna extends and the data on the counter 9 becomes 50, for example, the output of the incident detection logic section 12 becomes H, the terminal 203 becomes H, and the terminals 204 and 205 become L, turning off the transistor 22. . Therefore, the antenna stops in an incident state.

Here, an explanation will be given of the operation when the changeover switch 5 is turned on while the antenna is in a stopped state, for example.

In this state, the digital comparator 13 is outputting "H", and when the changeover switch 5 is closed, the terminal 209 is set to "L".
''. Therefore, even though the radio switch 3 is on, the terminal 200 becomes "L" and the antenna starts shortening due to the antenna shortening operation described above.Then, the count value reversed and transferred from the counter 10 When the content of the counter 9 reaches 50, the output of the digital comparator 13 becomes "L" and the terminal 200 returns to "H".

However, the Kotoki incident detection logic unit 12 is H'' and 20
3 also becomes H'', the subsequent input to the Karan consideration 9 is turned on, and the rotation of the motor 6 stops, so the antenna stops in the incident state.

Furthermore, if the changeover switch 5 is turned off from this state, the terminals 202 and 203 become "L", so the antenna extends, and when all the detection logic parts 11 become "H" after all the detections are performed, the antenna stops there.

Next, the operation of the counter 19 will be explained. If the motor 6 is locked for some reason, or if the signal from the detector 8 is interrupted due to a wire breakage or the like, the motor will allow the lock current to flow or will stop rotating. The counter 19 is to prevent this, and
After being reset by the output of the differentiators 15, 16, and 17 when the shortening signal is input or when the changeover switch 5 is turned on or off, if the pulse of the detector 8 is not input for a certain period of time, it will eventually output "H". . When the counter 10 outputs H,
Regardless of the state of the terminals 204, 207, both the terminals 205, 208 become "L", so the transistors 22, 24 remain off, and at that point, the power supply to the motor 6 is stopped. Next, the energization is restarted only after the counter 19 is reset by output from one of the differentiators 15, 16, and 17 again.

Also, insert a cassette tape and set cassette switch 4 to 4.
If it is on the b side, the input from 4b prevents it from descending even if the radio is turned off.Also, when key switch 2 is in ST, the ACC is turned off and the radio is turned off, but the I
The logic of C"H" and Acc"L" is taken, and the terminal 210 is "
H”, so the antenna is still prohibited from descending.

In the embodiments described above, the changeover switch 5 is used to control all live relationships, but the extension state of the antenna may be controlled not only in two stages but also in multiple stages.

That is, the embodiment shown in FIG. 3 allows switching in four stages. Here, 12a is, for example, when the counter 9 is 70 and “H”.
”, and 13a outputs “H” when it is 71 or more. Then, 12b and 13b output 50.51 or more, and 12c
, 13c outputs H" when 30131 or more. By connecting the selector switch 5 to either of them, the antenna stops at the corresponding length. In addition, the selector switch 5 is connected to the TV mounted on the vehicle. If you synchronize to the channel, the length will automatically change to 11 depending on the frequency of the TV
It becomes possible to adjust.

FIG. 4 shows an embodiment in which an auto/manual switching function is added, and 30 is an auto/manual changeover switch, which is connected to 30a for the above-mentioned auto operation, and connected to 3Qb for manual operation. The manual switch 40.50 is linked with the amplifier down selector switch, and the contact point is 40a.
, 50a, it is shortened, and when connected to 40c, 50c, it is extended. Also, the wiring shown in FIG.
0 may be configured with a logic circuit.

Further, in addition to the embodiment shown in FIG. 2, as a method of detecting rotation, a photo-incrementor, a photo-reflector, a magnet and a reed switch, a magnet and a Hall element, a magnetoresistive element, etc. may be used.

Further, the position of the antenna can also be detected directly from the movement of the antenna instead of the rotation of the motor.

〔Effect of the invention〕

As described above, according to the present invention, when the count value of the pulse signal indicating the position of the antenna operated by the motor reaches a value corresponding to the set value, the power supply to the motor is cut off. Since it is controlled, it has the excellent effect of being able to digitally control multiple switching instructions for antenna operation stages.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of an embodiment of the present invention, Figs. 2 and 2 are perspective views of a rotation detector, and Fig. 3 is a perspective view of a rotation detector. FIG. 4 is a diagram showing another embodiment of the present invention. 2...Key switch, 3...Radio switch, 5.
... Selector switch, 6... Motor, 7... Antenna Rondo, 8... Rotation detector, 18... Oscillator, 19
···counter. Representative Patent Attorney Takashi Okabe

Claims (1)

[Scope of Claims] Position detecting means for detecting the moving position of an antenna operated by a motor and emitting a pulse signal; switching setting means for setting and instructing the operation stage of the antenna; ii a counter for counting the pulse signal; and a control means for cutting off energization to the motor when the count value of the counting means reaches a preset value corresponding to the setting instruction.