JPH0141080Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention produces a sound (hereinafter referred to as key touch sound) that confirms that the switch has been pressed when the switch on the air conditioner operating device (hereinafter referred to as the remote control) is pressed. The present invention relates to an operating device for an air conditioner that can be used to operate an air conditioner.

When using a switch that requires almost no keystrokes in order to make the operating device thinner, it is necessary to confirm that the switch has been turned on.
I added a circuit that makes a key touch sound. Conventionally, in order to output this sound, an oscillation circuit, a one-shot circuit, etc. were required, resulting in disadvantages such as an increase in the number of parts.

The present invention eliminates the above-mentioned drawbacks, and does not require a special oscillation circuit to generate the key touch sound, but uses the oscillation wave as a key scan of a microcomputer for controlling an air conditioner, and as an output waveform for dynamic display. The purpose is to output key touch sounds using the .

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an air conditioner, in which a remote control 2 is connected directly below a main body 1. Figure 2 shows
2 is a configuration diagram of a portion of a remote control 2. FIG. The remote control box 2 is equipped with a switch 3 for turning on/off the power of the air conditioner and setting the room temperature, and a buzzer 4 is also installed inside the remote control 2. FIG. 3 is a circuit diagram of the present invention. Output port 6 of microcomputer 5 is connected through key matrix 7 to input port 8.

Input port 8 is connected to the input of R gate 12. The output of the R gate 12 is connected to a piezoelectric buzzer 13 in this example. The output of the R gate 12 is connected to a piezoelectric buzzer 13 in this example. The output of the R gate 12 is connected to a piezoelectric buzzer 13 in this example. The output port 6 is also connected to a dynamic drive transistor 10 of the display 9.

FIG. 4 illustrates waveforms around the gate circuit. a is the waveform of one output port 6 and b
is the output waveform of one of the output ports 6.
The narrower pulse is the key scan pulse, and the wider pulse is the display pulse. Since the display is lit in time division, the a and b pulses will not be at high level at the same time. c is the input waveform of the R gate 12 connected from the input port, and is at a low level when the switch is open, and when it is closed,
The waveform of output port 6 is output as is. If any switch on the remote control is pressed,
The output waveform of the R gate 12 becomes d, which becomes a drive wave for the piezoelectric buzzer.

The operation of the air conditioner operating device configured as described above will be explained. When a dynamic display pulse and a key scan pulse are output from an output port 6 according to the program of the microcomputer 5, the signals pass through a key matrix circuit and return to an input port 8. The output waveform of the output port is shown in FIG. 4a. This signal is transmitted to the key matrix 7, and when any key switch on the remote control is pressed here, the waveform of the output port 6 appears at the input port 8 only while the key switch is pressed. Therefore, the waveform of this output port 6 becomes a driving wave for the piezoelectric buzzer 13, causing the buzzer 13 to sound. The R gate may be any gate having the same number of inputs as the input ports 8. The oscillation frequency can be changed relatively easily by changing the interrupt oscillation frequency when the display of the microcomputer is output by an external interrupt or an interval timer.

As mentioned above, the present invention can significantly reduce the number of parts compared to having a separate oscillation circuit, can generate a key touch sound without using a complicated circuit, and can simultaneously operate a switch. This can be expected to have benefits such as being able to confirm switch operations at hand, as well as improvements to conventional circuits.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram showing the operating device of the air conditioner, Figure 2
FIG. 3 is a block diagram of the remote controller, FIG. 3 is a circuit block diagram of the operating device, and FIG. 4 is a waveform diagram of the gate circuit. In addition, 3 is a switch, 4 is a buzzer, 5 is a microcomputer, 6 is an output port, 7 is a key matrix, 8 is an input port, 9 is a display LED,
10 is a transistor, 11 is a power supply, 12 is an R gate, and 13 is a piezoelectric buzzer.

Claims (1)

[Scope of utility model registration request] In an air conditioner equipped with a remote control for controlling room temperature settings, etc., and a microcomputer in the remote controller for controlling according to operation instructions from a switch, a key matrix circuit is connected to the microcomputer through an input port and an output port. 1. An operating device for an air conditioner, comprising a connection configuration and a piezoelectric buzzer connected to the input port via an OR gate.