JPH038160B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a receiver for driving a wireless electric shutter using light, radio waves, etc.

Conventionally, as shown in FIG. 1, an antenna B ₁ receives radio waves from an oscillator A ₀ including a modulation circuit A ₁ , a high-frequency oscillation circuit A ₂ , an antenna A ₄ , and an oscillator push button A ₃ .
A front end B ₂ that amplifies the signal received by the antenna B ₁ and converts the frequency, a low frequency amplifier B ₃ , a filter B ₄ , and a signal that outputs an output between the receivers when a predetermined signal is received. A receiving circuit B ₀ consisting of a processing circuit B ₅ and three switching circuits D ₁ driven by the output of this receiving circuit,
It is known that a receiver E ₀ is composed of D ₂ and D ₃ .
In addition, you can "stop", "open", and "close" the shutter.
The motor control circuit operated in this way is the circuit shown in Figure 2, which includes reversible electromagnetic switches MC ₁ and MC ₂ , and limit switches LSA and LSB, which open when the shutter is fully closed or fully open. , "Stop" manual push button switch SW ₀ , the switching circuits D ₁ , D ₂ ,
It consists of a contact group RCO consisting of D ₃ output contacts Ry ₁ C, Ry ₂ C, and Ry ₃ C. The switching circuits D ₁ , D ₂ , and D ₃ are composed of a one-shot circuit consisting of a capacitor, a resistor, and two NOT gates, a transistor driven by the output of this one-shot circuit, and a relay driven by the transistor. By selecting the constants of the capacitors C ₁ , C ₂ , C ₃ and the resistors R ₁ , R ₂ , R ₃ of the one-shot circuit, as shown in the third example,
The output of the one shot circuit of the switching circuit is obtained. That is, the signal output time of the transmitter A ₀ is T, and the output time of the receiving circuit B ₀ of the receiver E ₀ is
t ₀ , the operating times of relays Ry ₁ , Ry ₂ , Ry ₃ are t ₁ , t ₂ ,
Let t be ₃ . Therefore, when the shutter is fully closed, the relay Ry ₁ operates for t ₁ hours, and its joint Ry ₁ C becomes open. Next, when Ry ₁ turns OFF, relay Ry ₂ is activated, so relay
Since the normally open contact of Ry ₂ contact Ry ₂ C is closed,
The coil of electromagnetic switch MC ₂ is connected between the R and S phases, MC ₂ is driven, the motor rotates in reverse, and winds up the shutter. Then, the electromagnetic switch MC ₂ is self-held by the contact MC _{2 (13-14)} . Therefore, relay Ry ₂ turns OFF, Ry ₂ C closes to the normally closed contact side, and
Even if the normally open contact Ry ₃ C of relay Ry ₃ is closed,
Since MC _{2 (11-12)} is open, it will not work in the opposite direction. When the shutter is fully opened, the limit switch LsB is opened and the electromagnetic switch _MC2 is de-energized. As mentioned above, this receiver E ₀ is
The relays Ry ₁ , Ry ₂ , and Ry ₃ operate each time the switch A ₃ of the transmitter A ₀ is closed, and the relays Ry ₁ , Ry ₂ , and Ry ₃ are turned off in this order. However, there are variations in the output times t ₁ , t ₂ , and t ₃ of each switching circuit, that is, the one-shot circuit, and the output time (t ₂ - _{t 1} ) is shorter than the operating time of the electromagnetic switch, so that MC ₂ does not operate. There is also a possibility that the shutter is not wound properly. Similarly, when the shutter is fully open, (t ₃ − t ₂ ) is
It is also possible that the shutter does not close because the operating time is too short compared to the MC ₁ 's operating time. Therefore
A sufficient time difference must be provided between t ₁ , t ₂ , and t ₃ . Then of course t ₃
It takes a long time to press button A ₃ of transmitter A ₀ .
If no pressing operation has been performed for at least t ₃ hours, t ₃
cannot be obtained, so the operation time of A ₃ will be longer. Furthermore, even if you press A ₃ , depending on where the receiving antenna B ₁ is placed, if there is a conductive metal plate nearby and the reception level is low, the output may not reach the specified level. It is conceivable that the operation may take a longer time.

The present invention improves the above-mentioned conventional drawbacks, operates the switching circuits D ₁ , D ₂ , and D ₃ sequentially, and furthermore, as long as the receiving circuit output exists for at least t ₁ hour,
The present invention provides a switching circuit for a wireless receiver for driving an electric shutter, which can obtain switching outputs from _t1 to _t3 .

An embodiment of the present invention will be described in detail below. Note that the motor control circuit is the same, and the transmitter A ₀ and the receiving circuit of the receiver are also the same as in the conventional example, so the switching circuits D ₁ , D ₂ , and D ₃ will be described in detail.

In FIG. 4, _B5 is a signal processing circuit of the receiving circuit _B0 . The switching circuit D'1 consists of a one-shot circuit consisting of a capacitor C ₁ , a resistor R ₁ , a NOT gate, NOT ₁ and NOT _2, and a relay and transistor circuit shown in FIG. 4B. Switching circuit D′2 consists of capacitor C ₂ and NOT gate NOT ₃ ,
It is a monostable multi-circuit consisting of NOT ₄ , resistor R ₂ , and the input of this monostable multi-circuit is taken from the output of NOT gate NOT ₁ , and the output is taken from the output of NOT ₄ , and the relay and transistor are This is the circuit shown in Figure 4B. Switching circuit D′3
is the output of NOT ₃ of switching circuit D′ ₂ and NOT ₄
It consists of the negation of the sum of the outputs (NOT ₅ ). Therefore, as shown in Figure 5, if the output time of the receiving circuit _B0 is t'0, each switching circuit
The output times of D' ₁ , D' ₂ , and D' ₃ are sequentially outputted at t' ₁ , t' ₂ , and t' ₃ , and the time t' ₁ is determined by the capacitor C ₁ and the resistor R ₁ . t′ ₂ and t′ ₃ are capacitor C ₂ ,
Determined by C ₃ and resistances R ₂ and R ₃ . If the output t'0 of the receiving circuit exists for more than ₁ hour t', then even if there is no output from the receiving circuit at _t'2 and _t'3 , _t'2 and _t'3 are output. The waveforms at each point of the switching circuits D' ₁ , D' ₂ , and D' ₃ are as shown in FIG.

Therefore, the switching circuit shown in Fig. 4 A and B
Since the configuration is D′ ₁ , D′ ₂ , D′ ₃ , t′ ₁
t′ ₂ is output after t′ ₂ ends, and t′ ₃ is output after t′ 2 ends, so even if t′ ₁ , t′ ₂ , and t′ ₃ vary individually, the conventional As usual (t ₂ −
There is no possibility that the times _t1 ) and ( _t3 - _t2 ) will be shorter than the operating times of the electromagnetic switches _MC1 and _MC2 . The reason is that (t ₂ − _{t 1} ) and (t ₃ − _{t 2} ) are related to variations in the component constants of the two one-shot circuits, but t' ₂ , t' ₁ , and t' ₃ are individually This is because the only difference is the variation in the constants of the switching circuit components.

As described above, according to the present invention, there is a receiving circuit that receives signals such as light and radio waves emitted from a transmitter and outputs an output during the period of the received signal, and three circuits that are driven for different times depending on the output of this receiving circuit. A receiver consisting of a switching circuit, a coil MC2 of the electromagnetic switch for driving the reversible electromagnetic switch in the reverse direction, a contact LSB of the limit switch that opens only when the shutter is fully open, and an electromagnetic switch for driving the forward rotation direction. Normally closed contact, shutter open instruction signal switch circuit output contact RY3C, shutter drive stop instruction signal switch circuit output contact
Connect the series circuit with RY1C to the power supply to control the shutter opening drive, and connect the coil MC1 of the forward direction drive electromagnetic switch, the contact LSA of the limit switch that opens only when the shutter is fully closed, and the reverse direction drive electromagnetic switch. Normally closed contact of the switch and shutter close instruction signal switch circuit output contact RY2C
and the shutter drive stop instruction signal switch circuit output contact RY1C are connected to a power supply to control the shutter drive motor, and the three receivers are The output contact of the switching circuit is the first switching circuit, which is driven by the output of a one-shot circuit whose input is the output of the receiving circuit, and the output of a second circuit whose input is the output of this one-shot circuit. The driving switching circuit is a second switching circuit, and the output of this second circuit is a third switching circuit.
The third switching circuit is driven by the output of the circuit.
By using a switching circuit of
The output contacts of the third switching circuit are sequentially operated one by one, and the output of the receiving circuit is obtained for at least a period longer than the operating time of the first switching circuit.
Since the switching circuit of the wireless receiver for driving the electric shutter is configured to output the output of the third to third switching circuits, the electromagnetic switches MC1 and MC2 of the motor control circuit can be operated stably with little variation in driving time. Because I am doing
The probability that the shutter cannot be operated even though the transmitter A ₀ is operated is reduced, and if the output of the receiving circuit B ₀ is at least longer than the output time t' ₁ of the first switching circuit D' ₁ , Even if the output of the receiving circuit _B0 disappears midway, the outputs of the second and third switching circuits can be obtained, and an extremely stable wireless receiver for driving an electric motor can be obtained.

Note that this switching circuit is not limited to the embodiments shown in FIGS. 4A and 4B, and may include other means that meet the gist of the present invention.

[Brief explanation of drawings]

1 to 3 are drawings showing a conventional example, in which FIG. 1 shows an electric circuit diagram and FIG. 2 shows an embodiment of a motor control circuit. FIG. 3 shows a waveform diagram, and FIGS. 4A, 4B to 6 show an embodiment of the present invention.
Figure 4A is an electric circuit diagram, and Figure 4B is a relay circuit. FIGS. 5 and 6 show switching circuits D′ ₁ ,
It is a waveform diagram of D′ ₂ and D′ ₃ . Here, A ₀ : Transmitter, B ₀ : Receiver circuit, D′ ₁ , D ₂ ,
D ₃ , D′ ₁ , D′ ₂ , D′ ₃ : Switching circuit, t ₁ , t ₂ ,
t ₃ , t′, t′ ₂ , t′ ₃ : Output time of switching circuit.

Claims (1)

[Claims] 1. A receiving circuit that receives signals such as light and radio waves emitted from a transmitter and outputs an output during the period of the received signal, and three circuits each driven for a different time depending on the output of this receiving circuit. The receiver consists of a switching circuit, the coil MC2 of the electromagnetic switch for driving the reversible electromagnetic switch in the reverse direction, the contact LSB of the limit switch that opens only when the shutter is fully open, and the normally closed electromagnetic switch for driving the forward rotation direction. contact, shutter open instruction signal switch circuit output contact RY3C, shutter drive stop instruction signal switch circuit output contact
Connect the series circuit with RY1C to the power supply to control the shutter opening drive, and connect the coil MC1 of the forward direction drive electromagnetic switch, the contact LSA of the limit switch that opens only when the shutter is fully closed, and the reverse direction drive electromagnetic switch. Normally closed contact of the switch and shutter close instruction signal switch circuit output contact RY2C
and the shutter drive stop instruction signal switch circuit output contact RY1C are connected to a power supply to control the shutter drive motor, and the three receivers are The output contact of the switching circuit is the first switching circuit, which is driven by the output of a one-shot circuit whose input is the output of the receiving circuit, and the output of a second circuit whose input is the output of this one-shot circuit. The driving switching circuit is a second switching circuit, and the output of this second circuit is a third switching circuit.
The third switching circuit is driven by the output of the circuit.
By using a switching circuit of
The output contacts of the third switching circuit are sequentially operated one by one, and the output of the receiving circuit is obtained for at least a period longer than the operating time of the first switching circuit.
1. A switching circuit for a wireless receiver for driving an electric shutter, characterized in that the switching circuit is configured to output the output of the third to third switching circuits.