JPH02276126A - Time switch - Google Patents

Abstract

PURPOSE:To confirm electrical feeding to a driving source and the operation of a switch element with visual observation by providing a first display element for emitting the light at the time of electrical feeding to the driving source and a second display element for emitting the light at the time of operating a switch element, and setting the first display element and the second display element to have different light emitting colors. CONSTITUTION:A light emitting diode LD1 functions as a first display element for emitting the light at the time of electrical feeding to a motor M as a driving source. A light emitting diode LD2 functions as a second display element for emitting the light at the time of operating a switch element which consists of a relay Ry. Since the first display element LD1 emits the light with electrical feeding to the driving source, the electrical feeding condition to the driving source can be observed visually. Furthermore, since the second display element LD2 emits the light when the switch element is operated, the first display element and the second display element emit the light simultaneously. However, since both the light emitting elements are housed in one package and are also set to have different colors, color mixture can be obtained under the condition that both the light emitting elements emit the light simultaneously. consequently, electrical feeding to the driving source and the operation of the switch element can be identified with visual observation.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a time switch whose ON/OFF state is reversed at a set time.

[Conventional technology]

This type of time switch that has been provided in the past has a dial that is rotated at a constant speed by a drive source such as a motor, and turns on and off in response to the advance and retreat of a setting element attached to the circumference of the dial. A device is provided in which the load is controlled by a switch element that controls the load. In other words, it detects whether the setting element protrudes from the circumferential surface of the dial and turns the switch element on or off.

[Problem to be solved by the invention]

By the way, in this type of time switch, the dial rotates at a very slow speed, so you can visually tell whether it is working or not. It is hoped that The present invention aims to solve the above-mentioned problems, and provides a time switch that allows confirmation of energization of the drive source and operation of the switch element, and allows image display to be performed at one location. This is what I am trying to do.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a first display element that emits light when the drive source is energized, and a second display element that emits light when the switch element is operated. The two display elements are set to emit different colors and are packaged in one package.

[Effect]

According to the above configuration, the first display element emits light when the drive source is energized, so that the state of energization to the drive source can be visually confirmed, and when the switch element operates, the second display element emits light. The first light emitting element and the second light emitting element will emit light at the same time. Both light-emitting elements are packaged in one package and are set to emit different colors, so when both light-emitting elements emit light at the same time, a mixture of colors is obtained, which is different from the state where the first display element is emitting light. The different colors of the light emitted make it possible to visually distinguish between energization of the drive source and operation of the switch element. Furthermore, since both light emitting elements are packaged in one package, the installation space is reduced and mounting is also facilitated.

【Example】

As shown in FIG. 2, a dial 1 is exposed on the front surface of a case 9, and this dial 1 is rotated at a constant speed by a driving source, and a setter 2 that protrudes from the circumferential surface of the dial 1 so as to be able to move forward and backward is connected to the dial 1. attached around the periphery of the Whether or not the setter 2 protrudes from the circumferential surface of the dial 1 can be set arbitrarily.The movement of the setter 2 is mechanically detected by a detection lever (not shown) that comes into contact with the circumferential surface of the dial 1. A switch 3, which will be described later, is opened and closed as the lever swings. In other words, due to the advance and retreat of setter 2,
An on time and an off time can be set, and the switch 3 turns on and off at the set time. The drive source is a motor M consisting of a synchronous motor, and as shown in FIG. 1, a power supply circuit 10 is connected to a commercial AC power source via this motor M. The motor M rotates the dial 1 at a constant speed, and the switch 3 is turned on or off depending on the position of the setter 2 provided on the dial 1, as described above. The power supply circuit 10 includes a bridge rectifier BR, and the bridge rectifier BR is connected to the motor M in series. A display circuit 22 having a light emitting diode LDI is inserted between the negative output terminal of the bridge rectifier BR and the power supply terminal of the motor M, so that the light emitting diode LD lights up during a half cycle of the commercial AC power supply. It has become. That is, the light emitting diode L D + functions as a first display element that emits light when the motor M, which is the drive source, is energized. Power supply circuit 1
0 is constructed by connecting a parallel circuit of a constant voltage diode ZD and smoothing capacitors Ct and C2 between the output terminals of the bridge rectifier BR, and supplies DC power. The switch 3, which is rMWl as the motor M rotates,
It is inserted between the power supply circuit 10 and the timer circuit 11, and power is supplied to the timer circuit 11 while the switch 3 is closed. The main part of the timer circuit 11 is constituted by a timer integrated circuit 12, and the time limit can be adjusted by a time setting section 13 consisting of a capacitor C3 and a variable resistor VR. Further, the output of the timer integrated circuit 12 is inputted to the base of the transistor Q via the mode selection switch 20.
It is inverted by transistor Q. The timer circuit 11 is also provided with a variable resistor R2 for finely adjusting the time limit. The mode selection switch 20 is
A state in which the output end of the timer integrated circuit 12 is connected to the base of the transistor Q, and a state in which the base of the transistor Q is connected to the negative side of the power supply circuit 10 are selected. Therefore, when the former state is selected, the transistor Q is turned on and off according to the operation of the timer integrated circuit 12, and when the latter state is selected, the transistor Q is always on when the switch 3 is on. become. The output of the timer circuit 11 is input to the relay drive circuit 15 via the output selection switch 14, and the coil of the relay Ry is energized while the output level of the timer circuit 11 is at °°H゛°. The output selection switch 14 connects the input end of the relay drive circuit 15 to the power supply circuit 10;
It is set to either a state where it is connected to the output terminal of the timer circuit 11 or a state where it is not connected to any other circuit. Also,
The input terminal of the relay drive circuit 15 is a thyristor SCR.
A coil of a relay Ry is connected in series to the anode of the thyristor SCH via a current-limiting resistor R, and a light emitting diode L D 2 is connected in series to the cathode of the thyristor SCH. The series circuit of the coil of relay Ry, resistor R, thyristor 5CR1 and light emitting diode LD2 is connected to the power supply side terminal of motor M and bridge rectifier circuit B.
It is inserted between the negative side output terminal of R and the negative side output terminal of R. Here, contact r of relay Ry is connected to the load, and relay Ry
functions as a switch element. According to the above configuration, when the dial 1 is rotated by the motor M and the switch 3 is closed in accordance with the position of the setter 2,
Since power is supplied to the timer circuit 11, the timer circuit 11 starts time-limiting operation when the switch 3 is closed. At this time, the output level of the timer integrated circuit 12 becomes "L". If the base of the transistor Q is connected to the output terminal of the timer integrated circuit 12 by the mode selection switch 20, the transistor Q becomes conductive. The collector of transistor Q becomes "H", that is, the output level of timer circuit 11 becomes 'H''. Here, the output selection switch 14
When the timer circuit 11 is connected to the relay drive circuit 15, the gate of the thyristor SCR becomes "H", so the thyristor SCR is activated during a half cycle of the commercial AC power supply.
is turned on, and the coil of relay Ry and light emitting diode LD2 are energized. In this way, the relay Ry is driven, and the fact that the relay Ry is driven is indicated by lighting of the light emitting diode LD. After the timer circuit 11 starts the time-limited operation, the time setting section 1
When the predetermined time set in step 3 has elapsed, the output level of the timer integrated circuit 12 becomes "H", so the output level of the timer circuit 11 becomes "L", and the thyristor SCR
During the half cycle in which a reverse voltage is applied between the anode and cathode of the thyristor SCR, the thyristor SCR is turned off, and from then on, energization to the coil of the relay Ry is stopped. At this point, the light emitting diode LDZ is also turned off. That is, light emitting diode LD
2 functions as a second display element that emits light during operation of the switch element consisting of relay Ry. As described above, when the relay drive circuit 15 is connected to the timer circuit 11 by the output selection switch 14, the time from the time when the motor M rotates and the switch 3 closes until the time limit operation of the timer circuit 11 ends. During this time, the coils of relays R and y are energized. Furthermore, if the switch 3 is closed and the current time is short compared to the time from the start to the end of the time-limited operation, the operation of the timer circuit 11 is stopped, and therefore the energization to the coil of the relay Ry is stopped, and the thyristor Regarding the SCH off operation, switch 3 is given priority. By the output selection switch 14, the relay drive circuit 15
When the input terminal of the thyristor SCH is connected to the power supply circuit 10, the input level to the gate of the thyristor SCH is always "H", so the coil of the relay Ry is always energized during a half cycle of the commercial AC power supply. That will happen. Furthermore, when a state in which no other circuit is connected to the input terminal of the relay drive circuit 15 is selected, the thyristor SC
R is always off and the coil of relay Ry is not energized. On the other hand, the mode selection switch 20 selects the transistor Q
When the base of the timer circuit 11 is disconnected from the output end of the timer integrated circuit 12, the output level of the timer circuit 11 is always "H", the thyristor SCR is turned on, and the coil of the relay Ry is energized. Therefore, depending on whether the switch 3 is turned on or off, the thyristor SCH is turned on or off, and the contact r of the relay Ry is turned on or off depending on the position of the setting element 2 of the dial 1 rotated by the motor M. It will be turned off. That is, the mode selection switch 20 has two states: one in which the on time and the off time are specified by the setter 2 of the dial 1, and the other in which only the on time is specified by the setter 2 of the dial 1, and the contact of the relay Ry is set for a certain period of time from the on time. The state that inverts the . By the way, both the light emitting diodes LD, LD2 mentioned above emit light in different colors, for example, the light emitting diode LD is set to green and the light emitting diode LD2 is set to red. Further, both light emitting diodes LD, LD are housed in one package 23, as shown in FIG. This package 23 has three terminals, ~L,
is provided, and the cathodes of both light emitting diodes LDI and LD2 are connected in common and connected to a central terminal L2. Therefore, each one of the light emitting diodes L D + ,
When L D z emits light, each light emitting color (green, red) is output, and both light emitting diodes L D + and L D
When LED 2 emits light, mixed colors are output, and light is emitted in three different colors depending on the state of each light emitting diode. is exposed on the front surface of the case 9. Therefore, the energization of the motor M and the operation of the relay Ry as a switch element can be displayed in one place, which reduces the installation space and facilitates the mounting work. Output selection switch 14,
Knobs 16, 21, and 17 for operating the mode selection switch 20 and the variable resistor VR for setting the time limit are also exposed from the case 9. The variable resistor VR2 is used to finely adjust the discrepancy between the scale set on the knob 17 and the actual time limit before the product is shipped. It cannot be adjusted from outside. The case 9 has a power terminal 18 connected to a commercial AC power supply and a load terminal 19 connected to a load.
is exposed. In the above embodiment, a timer circuit 11 is provided that starts a time-limited operation when the switch 3 is turned on, and the load is turned on and off by the relay Ry controlled by the output of the timer circuit 11. Switch 3 as shown
may be connected in series to the coil of relay Ry. Here,
The relay Ry is a DC relay, and a diode D2 is connected in parallel to the light emitting diode LD2 connected in series to the coil of the relay Ry, and the current flowing through the coil of the relay Ry is caused by the light emitting diode LD2 and the diode D2. It is designed to be full wave rectified. Further, a diode D1 is connected in parallel to the light emitting diode LD, so that the amount of current flowing to the coil of the relay Ry does not change during each half cycle of the commercial AC power supply. As shown in FIG. 5, a series circuit consisting of the coil of relay Ry and switch 3 is connected to a DC power source obtained by full-wave rectification by bridge rectifier BR, and a light emitting diode LD is also connected to the relay Ry. A light emitting diode LD may be connected in parallel to the coil. Effects of the Invention As described above, the present invention includes a first display element that emits light when the drive source is energized, and a second display element that emits light when the switch element is operated.
The first display element and the second display element are set to emit different colors and are packaged in one package. Since the display element emits light, the state of energization to the drive source can be visually checked.Moreover, since the second display element emits light when the switch element is operated, the first light-emitting element and the second light-emitting element emit light at the same time. It turns out. However, since the re-emitting elements are delivered in one package and are set to emit different colors, a state in which the re-emitting elements emit light at the same time results in color mixture, and a state in which the first display element is emitting light is obtained. This has the advantage that the color of the emitted light is different from the color of the light emitted, so that the energization of the drive source and the operation of the switch element can be visually identified. Furthermore, since the re-emitting element is packaged in one package, the arrangement space is reduced and mounting becomes easier.

[Brief explanation of drawings]

FIG. 1 is a specific circuit diagram showing one embodiment of the present invention, FIG. 2 is an external front view of the same, FIG. 3 is an external side view of a display element used in the same, and FIGS. 4 and 5 are in accordance with the present invention. FIG. 3 is a main circuit diagram showing another embodiment of the present invention. ]...Dial, 2...Setter, 3...Switch, 23...Package, LD,, LD2...Light emitting diode, M...Motor, Ry...Relay agent Benkun Shi Seki 1) Chief 7 Figure 2 q Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] (1) A dial that is rotationally driven at a constant speed by a drive source, a setter that can protrude from the circumference of the dial so as to move forward and backward, and a load that turns on in response to the advance and retreat of the setter from the circumference of the dial.・In a time switch equipped with a switch element that turns off, the first element emits light when the drive source is energized.
and a second display element that emits light when the switch element is operated, the first display element and the second display element are set to emit different colors and are packaged in one package. A time switch characterized by: