JPH0255989A - Electronic timer device - Google Patents

Abstract

PURPOSE:To switch on or off the power source of equipment to be controlled by connecting one switch to a terminal for selecting whether or not a timer is put in operation. CONSTITUTION:When the input terminal 9 for timer operation selection provided to a control part 8 is at a high potential, a transistor (TR) 14 is on and a TR 13 is also on to supply electric power to the equipment 20 to be controlled. When the switch 11 is switched and the input terminal 9 is at a low potential, the control part 8 performs timer operation for deciding whether or not the time of a timer part coincides with time which is set previously and stored, and consequently the TRs 14 and 13 turn off, so that the equipment 20 to be controlled is supplied with no electric power. Then when a time coincidence is obtained, an output terminal 10 is held at a high potential and the TRs 14 and 13 turn on to supply the electric power to the equipment 20 to be controlled.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an electronic timer device that turns on power to various devices at preset times (prior art). The apparatus will be explained using the block diagram shown in FIG. In FIG. 3, reference numeral 1 denotes an oscillator, which divides the frequency of this reference oscillation signal by a frequency divider 2 and outputs the digits of 1 hour and 2 minutes to the display driver 3. As a result, the time of 9 minutes is displayed using the display 4 such as a liquid crystal. These parts are collectively referred to as the electronic timepiece section 5. On the other hand, a control unit 8 equipped with a switch 6.7 for inputting a preset time of 2 minutes is connected to the frequency divider 2, and the values of the hour digit and minute digit in the frequency divider 2 are controlled. The time set and stored in section 8.

When the value matches the value of 1, a high potential is output from an output terminal 10 provided in the control section 8.

The output terminal 10 remains open until they match.

Further, the control unit 8 is provided with an input terminal 9 for selecting operation or non-operation of the control operation, and when this terminal is at a high potential, the control operation is disabled. The high potential output operation of the output terminal IO is not performed when the clock time mentioned above matches the preset time, and the terminal 10 always remains open, and the above control operation is performed when the input terminal 9 is at a low potential. It is now possible to do this. terminal 9
A movable contact piece C of the switch 11 is connected to , one fixed contact piece a is connected to a high potential, and the other fixed contact piece a is connected to ground. On the other hand, the positive power supply is connected to the emitter of the PN
A P-type transistor 13 is provided, a resistor 15 is connected between the emitter and the base, a resistor 16 is connected to the base, the other end of the resistor 16 is connected to the collector of the NPN-type transistor 14, and a resistor 18 is connected between the base of the transistor 14 and ground. A resistor 17 is connected to the base of the resistor 17, and the other end of the resistor 17 is connected to the movable contact f of the switch 12. The output terminal 10 of the control section 8 is connected to the movable contact piece f via a diode 19 for preventing backflow. One fixed contact piece d of the switch 12 is connected to a positive power source. A collector of the transistor 13 is connected to a power terminal of a controlled device 20 controlled by an electronic timer device. transistor 1
The emitter of 4 is connected to ground.

The switches 11 and 12 operate in conjunction with each other, and when the movable contact piece C of the switch 11 is connected to the fixed contact piece a side, the movable contact piece f of the switch 12 is connected to the fixed contact piece d side.

Conversely, when the movable contact piece C is connected to the fixed contact piece, the movable contact piece f is connected to the fixed contact piece e.

When the switches 11, 12 are in the state shown in FIG. 3, the terminal 9 for selecting the control operation of the control section 8 is at a high potential, the control section 8 is in the control non-operation, the output terminal 10 is open, and the transistor A high potential is applied to the base of the transistor 14 through the resistor 17° switch 12, so the transistor 13 is turned on, and a low potential is applied to the base of the transistor 13, so the transistor 13 is turned on, and power is supplied to the controlled device 20. On the other hand, if the switches 11 and 12 are connected in reverse, the control unit 8
The terminal 9 that selects the control operation of the control section 8 becomes a low potential.
The control operation of is in the operating state. Therefore, until the time on the clock section 5 reaches the time preset and stored in the control section 8, the output terminal 0 is open, the base of the transistor 14 is at a low potential, and the transistors 14 and 13 are both off. , power is not supplied to the controlled device 20. Next, when the time of the clock section 5 reaches the time preset and stored in the control section 8, the output terminal 10 becomes a high potential, and the transistor 14
The base of is supplied with a high potential and turned on, and the transistor 13 is also turned on, and power is supplied to the controlled device 20.

A logic flowchart in the control section of a conventional electronic timer device is shown in FIG. Let me explain this. First, the potential of the terminal 9 is input and determined. If the potential is high, the output terminal IO is always
to the open state. If the potential is low, then the value of the hour and two minute digits of the clock section is input, and it is determined whether this matches the time value set and stored in advance. If they do not match, the output terminal 10 is left open, and if they match, a high potential is output to the output terminal 10.

(Problems to be Solved by the Invention) As described above, the conventional electronic timer device uses two interlocking switches, one of which turns on and off a power supply transistor.

This means that the timer control operation is considered to be active only when it is off, and the timer can be controlled by other switches. This means that two switches must be provided, which increases the number of operation switches and the area occupied by the switch. However, it is an object of the present invention to provide an electronic timer device that performs the above two switches with one switch.

(Means for Solving Problem 11) The electronic timer device of the present invention does not perform the timer operation when the input terminal provided in the control section of the timer device for selecting whether to operate or not operates the timer is at a high potential. At the same time, a high potential is output to the output terminal of the control section, and when the operation selection input terminal is at a low potential, the above output is output until the time of the clock section and the time preset and stored in the control section match. Leave the terminal open.

This feature is characterized in that a high potential is output if there is a match.

(Function) In the electronic timer device of the present invention, one switch is used to switch whether or not to apply a high voltage to the terminal for selecting the timer operation of the timer control section, and this switch allows the one selection terminal to be set to a high potential. In this case, the timer does not operate and a high potential is output to the output terminal, which turns on the external transistor.

Power is supplied to the controlled device, and when the selected terminal is at a low potential using the switch, a timer operation is performed.

The output terminal is open until the time on the clock unit matches the time preset and stored in the control unit, and as a result, the external 1-transistor is inactive, and power is not supplied to the controlled device.
Next, if the time in the clock unit matches the preset and stored time in the control unit, a high potential is output to the output terminal, which turns on the external transistor and supplies power to the controlled device. can do.

(Example) The present invention will be described in detail below. FIG. 1 shows a block diagram of the electronic timer device of the present invention, and FIG. 2 shows a logic flowchart of a control section that is a part of the electronic timer device of the present invention. Components that are the same as those in FIG.

When the timer operation selection input terminal 9 provided in the control unit 8 in FIG. 1 is at a high potential, a high potential is output to the output terminal 10 provided in the control unit 8. As a result, the transistor 14 is turned on, and at the same time, the transistor 13 is also turned on, and power is supplied to the controlled device 20. This will be explained using the logic flowchart of FIG. 2. In the control section 8, the potential of the terminal 9 is determined as an input 2, and if the potential is high, the output terminal 10 is set to a high potential.

Next, in FIG. 1, the switch 11 is switched,
When the input terminal 9 becomes a low potential, the control section 8 operates as a timer to determine whether the time of the clock section matches the preset and stored time. and 13 are turned off, and power is not supplied to the controlled device 20. Next, if 1 matches, a high potential is provided to the output terminal 10, the transistors 14 and 13 are turned on, and power is provided to the controlled device 20. To explain this with the logic flowchart of FIG. 2, when the input terminal 9 is at a low potential, the control section 8 inputs the hour 9 minute digit value of the clock section 5, and sets the time preset and stored in the control section. If they do not match, the output terminal 10 is opened, and if they match, a high potential is applied to the output terminal 10.

(Effects of the Invention) As described above, according to the present invention, by connecting one switch to a terminal for selecting timer operation or non-operation,
It is possible to switch the power of the controlled device on or off, and at the same time, it can be controlled by a timer when it is off, reducing the number of switch circuits.
A cost-effective electronic timer device can be obtained.

[Brief explanation of the drawing]

Figure 1 is a block diagram of the electronic timer device of the present invention, Figure 2 is a block diagram of the electronic timer device of the present invention;
3 is a block diagram of a conventional electronic timer device, and FIG. 4 is a logic flowchart of the same. 5... Electronic clock section, 8... Control section, 9... Input terminal for timer operation selection, 10... Output terminal. Fig. 1 5 Electric j time correction Fig. 5 tM Shinshi Shuttle

Claims (1)

[Claims] an electronic clock unit having an oscillator and using the oscillation frequency of the oscillator as a reference; an output terminal that stores a preset time and outputs a constant voltage when the stored time and the clock time match; An electronic timer device having a control unit including a selection terminal for selecting whether or not to perform a timer operation, wherein when the selection terminal is at a high potential, the timer operation is inactive and a high potential is output to the output terminal. , when the selection terminal is at a low potential, a timer operation is performed, and the output terminal is at a low potential until the time on the clock matches a preset time, and then becomes a high potential. Electronic timer device.