JPH0242278B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a remote control device used for remotely controlling electrical equipment.

<Problem to be solved> For remote control devices (hereinafter referred to as remote controls) that are remotely operated using infrared rays, etc., the remote control receiving circuit may be affected by noise when the fluorescent lamp is turned on/off, signals from other similar remote controls, etc. Detection and erroneous control often occur. In particular, if you turn off the power to an electrical device using the remote control and then turn it on when you are out, there is a major drawback that it may cause a fire or other problem if the power is turned on due to an erroneous operation like this. It is something that exists.

<Objective of the Invention> Therefore, an object of the present invention is to provide a safe and highly reliable remote control device that does not malfunction even when the above-mentioned noise is received.

<Example> FIG. 1 shows an embodiment of the present invention.

The transmitter 1 includes a key input section 10 and an encoder 1
1. A first transmitting circuit 12 that transmits a command signal 30 at a first frequency or code; a second transmitting circuit 1 that transmits a deterrent signal 31 at a second frequency or code;
It has 3. The receiver 2 includes a light receiving circuit 20, a tuning circuit 21 tuned to the first frequency, a tuning circuit 22 tuned to the second frequency, and a first decoder 2.
3. Second decoder 24, AND with inhibit input terminal
A gate 25 and a control circuit 26 are provided.

When the key of the transmitter 1 is not operated, a coded signal at the second frequency is transmitted from the second transmitting circuit 13 according to the control signal of the encoder 11. Detected by the second tuning circuit 22, and detected by the second decoder 24.
A prohibition signal is obtained at , and the AND gate 25 is closed. In this state, even if external noise is mixed in and the first decoder 23 issues an erroneous output, the AND gate 25 will not output and the control circuit 26 will not operate. When the key of the transmitter 1 is operated, the operation of the second transmitting circuit 13 is stopped, and the first transmitting circuit 12, the light receiving circuit 20, and the first tuning circuit 2 are activated.
1. An operation command signal is transmitted by the first decoder 23, and the control circuit 26 is activated via the AND gate 25.

FIG. 2 shows a specific circuit diagram of the transmitter 1. Key signals from the keyboard 14 are input to a microcomputer 15, and the microcomputer 15 controls the first and second transmitting circuits 12 and 13. 16 is a first frequency oscillation circuit, 17 is a second frequency oscillation circuit,
18 is a first light emitting diode, and 19 is a second light emitting diode.

FIG. 3 shows a specific circuit diagram of the receiver 2. 1st
A first transistor 27 for determining the threshold value is provided at the downstream stage of the tuning circuit, and a second transistor 28 for determining the threshold value is also provided at the downstream stage of the second tuning circuit, and the output signal thereof is input to the microcomputer 29. There is. The microcomputer 29 has first and second decoders 23,
24, AND gate 25, control circuit 26
contains all.

<Effects of the Invention> According to the present invention, as explained above, malfunctions due to external noise are prevented, and the reliability and safety of the device are improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the entire embodiment of the present invention, FIG. 2 is a circuit diagram showing a specific example of the transmitter 1 in FIG. 1, and FIG. 3 is a specific example of the receiver 2 in FIG. 1. It is a circuit diagram. DESCRIPTION OF SYMBOLS 1... Transmitter, 2... Receiver, 10... Key input unit, 12... First transmitting circuit, 13... Second transmitting circuit, 20... Light receiving circuit, 21... First tuning Circuit, 22... Second tuning circuit, 25... AND gate with inhibit terminal, 26... Control circuit.

Claims (1)

[Claims] 1. In a device that has a transmitter that transmits an operation command signal at a predetermined frequency or code, and a receiver that is installed at a location apart from the transmitter and receives the operation command signal, the transmitter has a transmitter that transmits the operation command signal. If a key signal is not input to the key input section inside the aircraft, a device is installed that emits a signal different from the above-mentioned predetermined frequency or code, and when the above-mentioned receiver is receiving the different signal, the above-mentioned operation is performed. A remote control device characterized by being provided with a prohibition means for prohibiting reception processing of a command signal.