JPS60200614A - Timer circuit - Google Patents

Abstract

PURPOSE:To execute repeatedly a start of a timer by only executing a one-push operation, by adopting a system for measuring a time by a pulse count, and setting optionally in advance an oscillation frequency of an oscillating circuit part. CONSTITUTION:A circuit start part 3 is constituted of a push-button switch PSW. A load control part 5 and a circuit self-holding part 6 are constituted of a relay Ry and its NO and NC contacts, a diode D4, a capacitor C1, etc., a constant-voltage circuit part 7 is constituted of a transistor Q1, a Zener diode ZD, a resistance R3, a capacitor C2, etc., a timer count part 2 and an oscillating circuit part 1, and a part of a frequency adjusting part 10 are constituted of one IC, and the frequency adjusting part 10 is constituted by providing not only a part of this IC but also variable resistances VR1, VR2. When the push-button switch PSW is turned on in the course of an operation of a timer, an output of a constant-voltage circuit part 7 is cut off temporarily, and the timer count part 2 is reset.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a timer circuit for time-controlling the on and off of appropriate electric appliances by loading them.

(Background Art) Conventionally, a timer device that simultaneously controls the on and off of electrical appliances has a tile for setting the timer time, and when the time is set by turning the tile, time measurement is started at the same time, and the tile is set as time passes. This tile was configured so that it rotates at the same time so that the elapsed time can be ascertained, and also so that it snaps when it returns to the OJ setting position.

For this reason, in such conventional examples, it is necessary to set the timer time by turning the tile each time, which has the problem of cumbersome operation. After setting the time, it is not possible to change the set time while the timer is running, and if you want to extend the timer time, you have to turn the dial again after the time has expired to set the timer time, which is a hassle. There was something special about it.

(Objective of the Invention) The present invention not only allows the timer operation of the same timer time to be repeated any number of times just by performing one button operation, but also allows the timer time to be freely extended by operating the timer count reset section. In addition, in the case of a long-time timer, it does not take a long time to check the time accuracy, unlike the conventional method of checking the rotation of the tile to check the time accuracy, and the oscillation circuit It is an object of the present invention to provide a timer circuit whose time accuracy can be easily and quickly confirmed by measuring the pulse interval of the output of the timer circuit.

(Disclosure of the Invention) FIG. 1 shows a block diagram of an embodiment of the present invention, in which an oscillation circuit section (4) outputs a pulse signal with a period (frequency) set by a frequency adjustment section (10), and this pulse The timer time is measured by counting the signal . (2) may be configured by an integrated timer IC (with built-in oscillator). The frequency adjustment section (lO) can freely set the pulse oscillation period of the oscillation circuit section itl by adjusting its variable resistor VR. (3) is a circuit starting part that is operated with one button like a push button switch, and by operating this circuit starting part (3), a load control part (5) consisting of a relay etc. and a circuit self-holding part (6) are operated. ) is activated, and power is supplied to the load (4) and other internal circuits until the self-holding of both parts (51 (61) is released) by the output of a self-holding part release control part (8), which will be described later. (7) is a constant voltage circuit section, which supplies stabilized power to each circuit section including the timer count section (2).(11)
) is an energization operation display section, and the load control section (5)
This is provided to display the operating status of the timer circuit or the operating status of this timer circuit, including a power-on display that indicates that the power is turned on and is in a standby state, and an operation display that indicates that the timer is operating. I do. Here, the energization operation display section (11) displays both the above-mentioned energization display and the operation display, or displays the operation display in a switched manner. The circuit section (5) composed of the counter circuit 02 and the time elapsed display section H is designed so that the elapsed time can be determined because in the case of a pulse count type timer, it is not possible to determine the elapsed time like a tile drive type timer driven by a motor. The timer count section (2) divides the prescribed number of pulses into several parts and counts and displays each elapsed pulse so that the user can easily identify the elapsed time. be. The self-holding section release control section (8) is configured as described above (
Input the output that is output from the OUT terminal when the 2-in counter unit counts the specified number of pulses and reaches the specified number [7,
This signal sends out a signal to release the circuit self-holding section (6), turns off the load (4), and at the same time returns the circuit to its initial state. Timer counter reset 1 part (9
) is used when you want to extend the operating time while the timer is operating, and is activated by operating the circuit starting section (3) again with one push during the timer operation, and the timer counting section (2) and By applying a reset signal to the counter circuit (12), counting is started again from the initial stage, thereby extending the operating time.

04) in the figure is a power supply. Note that the timer count section (2)
etc. has a power-on reset function, the output of the timer link reset section (9) can be used to instantly cut off output 1 of the constant voltage circuit section (7) as shown by the broken line ■ in the figure. It is also possible to obtain a rear 1 lid function.

(Embodiment I) FIG. 2 shows a specific circuit example according to the block diagram of FIG. The circuit self-holding section (6) is composed of a relay RY and its N01NC contact, a diode D4, a capacitor 01, etc., and a constant voltage circuit section (7) is composed of a transistor Qt, a zener diode ZD1, a resistor R3, a capacitor C11, etc. It consists of a timer count section (2) and an oscillation circuit section +
11, and a part of the frequency adjustment unit (lO) is one IC.
In addition to a part of this IC, the frequency adjustment section (10) includes a variable resistor VR1.

VR. Also, the time elapsed display section (
13) is composed of a light emitting diode that is lit by each decode output of the califter circuit 02), and the self-holding section release control section (8) is mainly composed of a transistor Q, and the output of the timer count section (2) is When this happens, this transistor Q2 turns on, turns off relay Ry, and cancels the self-holding described above. Also, the imma count reset section (9) is mainly composed of a transistor Q.
When the rush switch PSW is turned on during timer operation, the output of the constant voltage circuit section (7) is temporarily cut off and the timer count section (2) is reset.

(Embodiment 2) FIG. 3 shows a specific circuit example of the second embodiment of the present invention. The timer count reset section (9), the califter circuit 02 for displaying elapsed time, and the elapsed time display section (13) are omitted. Note that the parts other than those mentioned above are the same as the circuits in FIGS. 1 and 2, and detailed explanation will be omitted.

Furthermore, in the circuits shown in Figures 2 and 3 above, the variable resistor R2 is for finely adjusting the basic oscillation frequency of the oscillation circuit section +11, and the variable resistor VRt is for setting the oscillation frequency arbitrarily and setting the time limit. It is not for setting the time,
A time scale is attached to the tile used to adjust the value of the variable resistor VR.

(Embodiment 3) FIG. 4 shows a third embodiment circuit, which has a configuration in which a timer count reset section (9) mainly composed of transistor Q3 is added to the circuit of the embodiment shown in FIG. This circuit has a configuration in which the counter circuit 0'2J for displaying the elapsed time and the time elapsed display section θ3) are omitted from the circuit of the embodiment shown in FIG. 2, and the other parts are the same as the circuits in FIGS. It is.

Fig. 5 shows a circuit diagram of the main parts of a modified circuit of the circuit shown in Fig. 4, and is an example in which an AC relay is used as the relay Ry of the circuit self-holding section (6), and the power supply is set to an AC power supply, and is omitted. The circuit portion shown in FIG. 4 is similar to the circuit shown in FIG. Note that the self-holding of the relay Ry for self-holding operation is released by turning on the transistor Q2 and cutting off the gate input of SCH.

(Effects of the Invention) As described above, the present invention employs a time measurement method based on pulse counting, so by setting the oscillation frequency of the oscillation circuit section to an arbitrary value, it is possible to perform various operations with just one button operation. The timer can be started even once, and the timer can be started even once, which eliminates the trouble of setting the timer time using a time cell every time the timer is started, which is the case in the past. When configuring a time timer, it is possible to create products with high time accuracy by managing the pulse cycle of the oscillation circuit output, and unlike conventional time cell type products, it is necessary to operate for a long time to check the accuracy. This has the effect of simplifying manufacturing.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a circuit diagram of a specific circuit example of the same as above, Fig. 3 is a circuit diagram of a second embodiment of the invention, and Fig. 4 is a circuit diagram of a specific circuit example of the same. A circuit diagram of the third embodiment, FIG. 5 is a main part circuit diagram of a modification of the third embodiment,
(1) is the oscillation circuit section, (2) is the timer count section, (3
) is the circuit starting part, (4) is the load, (5) is the load control part,
(6) is the circuit self-holding section, (7) is the constant voltage circuit section, (8
) is a self-holding unit release control unit. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] a timer counting section that counts pulses of the oscillation circuit section output and times up from K; a load control section and a circuit self-holding section that maintain power supply to the load and the circuit section until time-up by one-button operation of the circuit starting section; A timer circuit comprising: a constant voltage circuit section for stabilizing the power supply of the timer counting section; and a self-holding section release control section for canceling the self-holding of the self-holding section when time-up occurs.