JPS60239105A - Motor-driven antenna system - Google Patents

Abstract

PURPOSE:To switch on/off surely the power application to a motor moving an antenna member by providing a monostable multivibrator circuit triggered with the application/interruption of power and a current switch conductive at the start of the operation of the monostable multivibrator circuit and nonconductive at the end of operation. CONSTITUTION:When a power switch of a radio set is applied, a positive potential is inputted to a terminal Ra and an output signal waveform F of a waveform shaping circuit 3 goes to a high level. The monostable multivibrator circuit 5 is triggered at the leading/trailing of the signal at the terminal Ra, its output H goes to a high level for a prescribed time and its operating time T is set longer than the time required for the elevation/descend of an antenna member. When the output H is at high level, a relay circuit L1 is activated and a relay circuit L2 is activated while being excited via a transistor with a high level signal from the terminal Ra. Thus, even if the operation of limit switches LU, LD activated at the end of the completion of the elevation/descend of the antenna member so as to interrupt the power application to the motor M is not certain, the power application to the motor M is interrupted at the end of the operation of the monostable multivibrator circuit 5 so as to prevent discharge of a battery.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to improvements in antenna devices, and is particularly effective for fully automatic types.

FIG. 1 shows a conventional example, which will be explained below using FIG.

In FIG. 1, a radio R is supplied with power from a power source V via a switch l. The power terminal Ra of the radio R is connected to the excitation coil C2 of the relay circuit L2, and the relay circuit L
Contacts E, , E2 of 2 are connected to the power supply V and ground, respectively, and connected to one terminal of the motor H through contacts E, EA, and contacts E4t, E. are connected to the other terminal of the motor M via a lower limit switch LD and a higher limit switch LU, respectively.

When the switch L is made conductive, the radio R operates, but at the same time, the relay circuit is activated, and the excitation coil C of the relay circuit is also energized, so the contacts E and E2 of the relay circuit move in the direction of the arrow B, and the electric motor starts. M is energized in the direction of arrow l. Since the electric motor M is configured to raise an antenna member (not shown) when energized in the direction of arrow A, the antenna member (not shown) rises at this time.

When the antenna member has finished rising, the limit switch L
Since U operates and its contacts open, the electric motor M is de-energized and the antenna member stops rising. At this time, the limit switch LD is already closed. Therefore, the raised antenna member allows the user to listen to the radio in good condition. On the other hand, when switch L is opened, relay circuit L. 2
Since the contacts E7 and EY return, the electric motor M is energized in the direction opposite to arrow A, and the antenna member descends. When the antenna member completes its lowering, the limit switch LD operates and opens its contact, so that the electric motor M is de-energized and the antenna member stops lowering.

In this way, the antenna member rises in synchronization with turning on the radio's power, and descends in synchronization with turning off the power. However, since the limit switches LD and LU are mechanical means, their operation is unstable, and if these limit switches do not operate, the power to the motor M may be cut off even though its operation has been completed. This will cause the vehicle's battery to be discharged unnecessarily. On the other hand, this conventional example has the disadvantage that current may flow through the electric motor H even during the starter operation for starting the engine, making it impossible to supply sufficient current to the scooter.

The present invention has succeeded in overcoming these drawbacks, and the details thereof will be explained below using FIG. 1.

The same symbols are used for the same members as in FIG. 1, and the explanation thereof will be omitted. In FIG. 2, the power terminal R7 of the radio is input to the waveform shaping circuit 3 and further input to the monostable circuit S, and is triggered by the rising and falling edges of the signal. A terminal x is a terminal from which a signal is obtained during operation of the starter, and is inputted to an inhibit input terminal of a monostable circuit via a waveform shaping circuit l. Excitation coil C of relay circuit L7
7 is connected to the output of the monostable circuit S through the transformer 1,
The excitation coil C of the relay circuit L-v is excited by the output of the waveform shaping circuit 3 via a transistor. Next, the operation of this embodiment will be explained using FIG. 3.

Fig. 3 shows a time chart of this embodiment, where symbol F is the waveform of terminal Ra that has been waveform-shaped, symbol G is the waveform of terminal U that has been waveform-shaped, and symbol 〃 is the output of the left monostable circuit. The waveforms are represented by symbols /l/i, which indicate the rising length of the antenna member, respectively.

First, when a power switch of a radio (not shown) is turned on, a positive potential is input to the terminal Ra, and the signal waveform indicated by symbol F becomes high level. Monostable circuit S is at terminal R. Since it is triggered by the rising and falling edges of the signal, it remains at a high level for a certain period of time as shown by the symbol. The operating time of the monostable circuit S shown by symbol T is set longer than the time required for the antenna member to rise and fall.

Therefore, the output of the monostable circuit 5, which is at the neutral level, excites the excitation coil C'/ of the relay circuit Ll through the track star, and the contacts DI and D2 close, while the excitation coil C'/ of the relay circuit Ll also closes. Further, it is excited and operated via a transistor by a high-level signal at the terminal Ra. Therefore, the electric motor M is connected to the relay circuit L1. ．． Electricity is applied in the direction of arrow A through L2, and the antenna member rises. When the antenna member completes its ascent, the limit switch l1rl operates and its contact opens, so that the electric motor M is de-energized and the antenna member stops ascending. This situation is shown by symbol I. The monostable circuit ends its operation after 5 hours T, and the excitation coil CI of the relay circuit L/ is de-energized, so the contact DI
D2 opens and the power supply to the motor side is cut off.

Therefore, when the operation of the IJ Mitswitch LU is uncertain and the power to a radio (not shown) is cut off next time, the terminal Rα becomes a low potential, and the signal indicated by symbol F becomes a low level. Since the monostable circuit S is triggered by the rise and fall of the signal at the terminal Ra, it remains at a high level for a certain period of time as shown by symbol H, and the antenna member moves down through the relay circuit L/ via the transistor. When the antenna member has finished lowering, the limit switch LD operates and opens its contact.
Power to electric motor M is cut off. This situation is shown by symbol H. Monostable circuit S ends its operation after time T, rendering relay circuit L/ inactive. Therefore, similarly, when a signal is input to the IJ terminal, the monostable circuit 5 will be
When the operation is stopped and the signal is released, the operation is resumed. When the power is turned on to the radio and the terminal Rα becomes a high potential, and then a signal is input to the terminal -, that is, the signal indicated by symbol F becomes high level, and then the signal indicated by symbol G becomes high level, the symbol Monostable circuit S shown in H.
The output becomes a low level, and the relay circuit L/ is deactivated to cut off the power to the motor M. Therefore, even if the antenna member is in the middle of rising, it stops rising. When the signal at terminal A is released and the signal indicated by symbol G becomes low level, the monostable circuit S resumes operation and ends its operation after time T.

Therefore, the relay circuit L/ is activated, and the antenna member begins to rise, and the limit switch LU cuts off the current.
At the end of the operation of the single constant circuit S, the relay circuit L'/
becomes inactive. Furthermore, even if the antenna member is in the middle of its descent, if a signal is input to the terminal, the relay circuit Ll becomes inactive, the power to the motor M is cut off, and the descent of the antenna member is stopped. When the signal from terminal A is released, the descent will resume.This signal is input to this terminal when the 2-piece starter is operating, and when the starter is operating, the 7 current to motor M is cut off and sufficient power is supplied to the starter. current is supplied.

The details of the monostable circuit 5, which operates in this way, are explained in Part 6 (a).
) Explain using diagrams. At the input terminal W, a wave capacitor and an exclusive OR circuit /q constitute a rising edge, falling edge detection circuit. This edge detection signal makes the transistor conductive for a predetermined period of time via the OR circuit. Transistor 17 discharges the charge on capacitor 1.2. When the edge detection signal disappears, the transistor 12 becomes non-conductive, and the capacitor 12 becomes the resistor 12.
/ is charged via. When the potential of the capacitor/A exceeds the threshold and hold voltage of the NOR circuit/B, the output terminal/
3 becomes a high level, and the time becomes the operating time. Therefore, a monostable circuit is formed which is triggered by the rising and falling edges of the signal at the input terminal W. Further, when a high level signal is input to the input terminal io, the output of the NOR circuit 1B becomes low level and the transistor /7 becomes conductive. Therefore, the charge of capacitor/2 is discharged and discharged. Next, when the input terminal IO becomes low level, the charges in the OR circuit /S and the NOR circuit /2 have been discharged, so the output terminal /3 returns again.
is output for a predetermined period of time.

That is, the input terminal 10 is a prohibited input, and the output of the waveform shaping circuit DA is input thereto.

It is something.

On the other hand, as shown in Fig. 6(h), instead of the relay circuit /, a transistor TI is used, and the terminal /3 is connected to the output of the monostable circuit S, and the terminal /g is connected to the relay circuit L2. also works in exactly the same way. Also, relay circuit 11. L
2, as shown in FIG. 4(c), the transistor T2
．． T3. A transistor bridge is formed by T'ATS, and the diagonal of the transistor bridge is connected to the motor M; the terminal /3 to which the output of the monostable circuit 3 is input is connected to the transistor TS through the AND circuit 2/22. T
It is driving the motor.

A terminal /q to which the output of the waveform shaping circuit 3 is input is input to the AND circuit-1 and also to the AND circuit-≧ via 20 inverter circuits.

If terminal /3 is now at no/no level, AND circuit 2/.

Since both terminals 22 open their gates, if the input to the terminal / is at a high level, the transistor T becomes conductive, and the conduction of the transistor Tll- causes the transistor T3 to conduct through the resistance. Therefore, the motor M is energized in the direction of the arrow A, and if the input to the terminal /9 is at a low level, the transistor TS becomes conductive, and the transistor Tel becomes conductive via the resistor 23 due to the conduction of the transistor T3.

Electric motor H is energized in the opposite direction of arrow l. If terminal /3 is at a low level, AND circuits 2/2 and 22 both close their gates, so both transistors rll and rs are rendered non-conductive, regardless of the state of terminal /q.

Therefore, if the output of monostable circuit 9 is connected to terminal /3 and the output of waveform shaping circuit 3 is connected to terminal /9, the operation will be exactly the same as when relay circuits L/ and L2 are used.

Next, another embodiment will be explained below using the diagram. Components having the same functions as those in FIG. 1 are given the same symbols and their explanations are omitted.

In Figure D, the hold circuit 7 temporarily holds the signal of the waveform shaping circuit 3 according to the control input and outputs it.
The current detection circuit g detects that the current flowing through the motor M is higher than a predetermined value, and its output is inputted to the control circuit of the hold circuit 7 via the diode D2, and the signal from the terminal C is sent to the waveform shaping circuit 6. It is also input to the control input of the hold circuit 7 via the diode DI. Next, the operation of this embodiment will be explained using FIG.

FIG. 5 shows a time chart of this embodiment.
The same symbols are used to indicate the same signals as those in the figure, and the explanation will be omitted.

When the power switch of the radio (not shown) is turned on,
A positive potential is input to the terminal Rα, and the signal indicated by symbol F becomes high level. Therefore, the input of the hold circuit 7 also becomes high level, but since there is no control input to the hold circuit 70 at this time, a hold signal is applied. The monostable circuit 5 is triggered by the rise and fall of the output signal of the hold circuit, so the symbol H
As shown in the figure, it remains at a high level for a certain period of time.

As mentioned above, the operating time of the monostable circuit S shown by symbol T is
The time is set longer than the time required for the antenna member to rise and fall.

Therefore, the output of the monostable circuit S, which is at the level . At the same time, the high-level output of the hold circuit 1 is sent to a relay circuit via a transistor, which excites the excitation coil C- of 2, which causes the relay circuit to switch, and the contact of the motor M is energized in the direction of the arrow 1, as shown in the figure. The antenna member that does not move upwards as shown by symbol I. The current flowing to the motor M is detected by a current detection circuit g and outputted to a control input of a hold circuit via diodes D and 1. Hold circuit 7/'i This control input holds the input at that point in time and outputs it.

Are you going home? Since the ψH ridge is at the low level, the hold circuit 7 holds the high level in response to the control input and outputs it, regardless of the input, until the control input is released. Continue outputting level.

When the antenna member completes its rise, the limit switch L U
When the motor M operates, the current is cut off and the electric motor M stops. At the same time, the current detecting circuit g no longer receives current, so its output is low), the control input to the hold circuit 70 is released, and the hold memory operation at the current level is stopped. At this time, even if the operation of the limit switch LU is uncertain and the limit switch LU does not operate and the motor M continues to be energized, the monostable circuit S sets the output to a low level at the end of the time indicated by the symbol T, and A contact point of relay circuit L/ is opened and power to motor M is cut off. At this time again,
The current detection circuit g eliminates its output, and the hold circuit 7 stops the hold memory operation. When the terminal Ra becomes a low potential, the direction of energization to the motor H is reversed, the antenna portion i is lowered, and the hold circuit is held while the 1-limit machine M is energized. Next, when a signal is input to the terminal unit while the antenna member is rising or falling,
That is, when the signal indicated by the symbol G becomes a low level, even if the monostable circuit S is in operation, its output is set to a low level as indicated by the symbol H, and the contacts of the relay circuit L/ are opened via the transistor, and the motor M The antenna member stops raising or lowering. When the signal at terminal A is released and the signal indicated by symbol G becomes low level, the monostable circuit S resumes operation. Therefore, the antenna member resumes its upward or downward movement. A signal is input to this terminal when the starter is in operation, and when the starter is in operation, power to the electric motor M is cut off so that sufficient current is supplied to the starter. Furthermore, even if the input signal to the terminal Ra changes during the rising or falling of the antenna member, the hold circuit 70
Due to the action, when the limit switch LU or LD is operated by completing the raising or lowering of the antenna member, the electric motor H
are energized in the same direction. This means that in response to excessive operation of the terminal Rα, the hold circuit ignores the input while the hold memory is operating, so that the antenna
This prevents members from rising or falling excessively, and is effective in extending the life of mechanical parts including the electric motor M in the device of the present invention. On the other hand, terminal C is a waveform shaping circuit 6. Since it is input to the control input of the hold circuit 7 via the diode Dl, when the terminal C is set to a high level, the hold circuit is forced to perform a hold memory operation, and subsequent changes in the signal are stopped. The power of a cassette tape recorder (not shown) is input to this terminal C. That is, during playback of the cassette tape recorder, the hold circuit 7 performs a hold memory operation, so the power to radio R is cut off, and terminal R (
When the cassette tape recorder is switched from the cassette tape recorder to the radio again, it has the effect of being able to immediately switch to the listening state.

Next, details of the hold circuit 7 will be explained using FIG. 7(α).

In FIG. 7, the terminal B receives the output of the waveform shaping circuit 3, is an output terminal to the terminal monostable circuit 5, and is a control input terminal for controlling the terminal λ hold memory operation. The signal input from the terminal -S passes through the OR circuit 3θ, and one passes through the inverter circuit -g and the OR circuit 29, resulting in R = 57 by the NAND circuit 3/, j, 2.
It is input to the lipfrog circuit. Control input terminal 2
1 is at a low level, the output of the OR circuit 2q outputs an inverted version of the signal at the terminals 2 and 3.
The output of θ is the same as the signal of terminal lS. Therefore, at this time, the NAND circuit J/ , , ? , 2 is an output terminal without performing a hold memory operation, and when the same signal as that of terminal 5 is output to 2 O, the output of any of the OR circuits J, 9, and 30 is output. R becomes low level and consists of NAND circuit 3/, 32
-5 flip-flop circuit holds the previous value in memory. While the control input terminal 27 is at a high level, the OR circuit 29, 3θ is activated regardless of the level of the two signals at the terminal.
closes its gate, so its output is low and the hold memory operation is held. When the signal at the control input terminal core becomes a low level, the OR circuits u9 and 30 open their gates, so the signal on the left side of terminal 2 is transmitted as described above, and the same signal as on terminal J is output to the output terminal UO. It is something that

Next, details of the current detection circuit will be explained using FIG. 7(h).

In FIG. 7(h), terminal 3 is a terminal into which the current of the motor AI flows through the relay circuit 2, and terminal 3g is a current detection output terminal. Resistor 3, with a resistance value of a few tenths of an ohm? A current flows through the motor A from the terminal 37, causing a voltage drop across the resistors 3 and 3. The comparator circuit 3A converts the voltage drop across the resistor 3.7 and the potential of the reference voltage source 33 into a specific voltage drop. When the potential is higher than the potential of the reference voltage source 33, the output terminal 3g is set to high level.

Generally, a DC motor draws a large amount of current when it starts up, and then the current value decreases. Resistor 3. ? and reference voltage source 3. The respective values are selected so that even a small current after the electric motor H is started can be detected. Therefore, until the limit switch LU or LD is turned off, or until the relay circuit L/LD is turned off,
The device continues to detect current until it operates.

Next, an embodiment using a cyrisk instead of the relay circuit L/ will be described in detail with reference to FIG.

In FIG. 3(α), the output of the terminal/3-digit monostable circuit S is inputted, and the output of the hold circuit is inputted to the terminal/9. Connect the relay circuit through the terminal A transistor,
The terminal ring A is connected to the relay circuit, and the motor M is connected via 2.
This is a terminal for supplying electricity to the terminal.

The monostable circuit S operates, and a signal at the noise level is input to terminal /3, and the capacitor and resistor q3 differentiate the rising edge of the signal to trigger the thyristor 39. Therefore, the thyristor 3q conducts current to the motor H via the conductive terminal portion. When the antenna member finishes rising or falling and the limit switch LU or LD operates, the electric current to the motor M is cut off and the thyristor 39 becomes non-conductive.

On the other hand, when the IJ switch LU or tdLD becomes inoperable, the thyristor 39 remains conductive, but when the wholesale stabilizing circuit S ends its operation after a predetermined time and the terminal /3 becomes low level, the capacitor value The resistor differentiates the falling edge of that signal and outputs it. - The output of the hold circuit 7 is inputted to one input of the exclusive NOR circuit 0 via the terminal /9, and the other input is normally outputted at the level of ``ma'' and ``-''. When the capacitor value and resistance q/ differentiate the fall of the signal at terminal /3, the other input of the exclusive NOR circuit temporarily becomes a low level, inverting the signal at terminal /q and outputting it to terminal 4&. Ru. Therefore, the relay circuit 7.2, which is driven via the transistor by the signal at terminal '%5, temporarily switches its contacts and returns to normal. When the contacts of relay circuit L2 are switched, the power to motor M is always cut off temporarily, so at this time thyristor 3q
is considered to be non-conducting. Even when a thyristor is used in this way, it operates in the same way as when a relay circuit is used.

On the other hand, the resistor '77 has a sufficiently high resistance value so as not to cause any problem in turning off the thyristor 39. Due to this resistance duct, the terminal 3g has the same function as the current detection circuit.

Therefore, the present invention has the feature that it is possible to make sushi at low cost by using electric current and without using the circuit shown in FIG. 7 (side).

Fig. 3(b) shows another embodiment using a relay circuit.
The details will be explained using .

In FIG. 3(b), the output of the monostable circuit S is input to the terminal /3, and the output of the hold circuit 7 is input to the terminal /9. The signal at terminal /3 is sent to AND circuit λ/, 2.
2, and the signal at terminal /q is input to the AND circuit, 2
2, and is also input to the AND circuit 2/ via the inverter circuit θ.

AND circuits 21.2.2 and 21.2.2 are respectively connected to relay circuits L3. It is driving L'l.

In the illustrated state, the motor M is not energized, but when the monostable circuit S operates and the terminal 13 becomes high level, the output of one of the AND circuits 2/ and 21 becomes high level depending on the state of the terminal /9. becomes.

If the signal at terminal /9 is at a high level, only the output of the add circuit 22 (D) is at a high level, and the relay circuit L'l operates via the transistor.

When the relay circuit is operated and its contacts are attracted, a current flows through the motor M in the direction of arrow A, causing an antenna member (not shown) to rise, and after completion of the rise, the limit switch LU operates to cause the motor M to Power is cut off. Also, assuming that the signal at terminal /W is at low level, only the output of AND circuit and 2/ will be at high level through the inverter circuit, and relay circuit L3 will operate through the transistor, and the contact of relay circuit L3 will be activated. The electric motor M is energized in the opposite direction of the arrow l, the antenna member (not shown) is lowered, and after the lowering is completed, the electric motor M is de-energized by the operation of the limit switch D.

When the operation of the limit switches LU and LD is uncertain, the monostable circuit S ends its operation after a predetermined time and a low level is input to the terminal /3.

Terminal/? When becomes low level, AND circuit 2/, 22
Both close their gates, so their outputs both go low. Therefore, relay circuits L3 and LII are both inoperative, resulting in the state shown in the figure, and power supply to motor M is cut off.

As described above, the device of the present invention achieves the objects mentioned at the beginning, eliminates the drawbacks of the conventional device, and has the effect of extending the life of the antenna device.

[Brief explanation of the drawing]

FIG. 7 is a diagram showing a conventional example, FIG. 2 is a diagram showing an embodiment of the device of the present invention, FIG. 3 is a diagram showing a time chart of the device shown in FIG. 2, and FIG. 9 is a diagram showing another embodiment. Figure S is a diagram showing the time chart of the apparatus shown in Figure 2, Figure 6 is a diagram showing details of each part of the apparatus shown in Figure 2, and Figure 7 is a diagram showing the details of the equipment shown in Figure 2. FIG. 3 is a diagram showing details of each part, and FIG. 3 is a diagram showing another embodiment. r...power supply, R...radio, R...radio power supply, CI, C, l...excitation coil, L/, L2.
, L3. Lll...Relay circuit, p/, D2. El,
Eko, E3. ,, Ega, E! ;. E6...Relay circuit contact, M...Motor, LU,
LD...limit switch, l...power switch, co...inhibit input, 3,9. A...Waveform shaping circuit, 7...Hold circuit, Z...Current detection circuit, S
...monostable circuit, // -resistance, yx...capacitor, /9...exclusive OR circuit, /S...
OR circuit, 16...NOR circuit, 7...Transistor, T/, T2. T3. T'l', T, S-...
Transistor, λθ...inverter circuit, 2/, 2.
2...AND circuit, U3. Review...Resistance, 2g...Inverter circuit, 29,. 30...OR circuit, 3/, 3λ
...Nand circuit, 3? ...Resistance, 3.9...Reference voltage source, 36...-Comparator circuit, 39...Thyristor, Qθ river couscule-sibnor circuit'<Z
/ 113 'I...Resistance 1. 4', 2. subject··
・Capacitor. , Patent Applicant Seko Giken Co., Ltd. Fig. V L 2 Sub No. 4 Fig. 6 Fig. 7 (0) L 6 Fig. (c) ()) Skewer

Claims (1)

[Scope of Claims] (1) Regarding an electric antenna device configured such that each limit switch is operated to cut off power to the electric motor when the antenna member completes the upward movement and downward movement, an external input is required. a first current switch which becomes non-conductive upon being triggered by the rise and fall of the first signal; The second signal is input to a first current switch that reverses or forwards the energization of the monostable circuit, and the inhibit input terminal of the monostable circuit.
The monostable circuit disables operation due to the generation of the second signal, and the disappearance of the second signal causes the monostable circuit to disable operation.
＾ π Surplus - Punishment An electric antenna device that uses the old ladle and full kettle. (2) In the claim set forth in paragraph (1), a current detection circuit that detects that the current flowing through the motor is larger than a predetermined value; a current detection circuit that holds the first signal; A hold circuit that outputs to the first current switching device is provided, and the hold circuit is controlled by a third signal input from the outside, and either the third signal or the output of the current detection circuit. An electric antenna device comprising: (8) An electric antenna device according to claim (1), characterized in that the first current switch or the second current switch is constituted by a relay circuit. (4) In the claim set forth in item (1), the electric antenna device is characterized in that the first current switch or the first current switch is constituted by a semiconductor power element. .