JPH02165534A - Latching relay device - Google Patents

Abstract

PURPOSE:To reduce currents passing through coils to their required minimum amount and also make it possible to accomplish relay action by stopping transmission of electricity to the coils immediately after driving of a relay contact. CONSTITUTION:Set side signals are inputted to the set side terminal 202 of a second relay contact 2 and reset side signals to the reset side terminal 203. When a first control signal is inputted to a driving circuit, the driving circuit then transmits electricity to a set coil 9, whereas when a set side signal is inputted from the common contact 201 of the second relay contact 2 the driving circuit stops transmission of electricity to the set coil 9. Also, when a second control signal is inputted to the driving circuit, the driving circuit then transmits electricity to a reset coil 10, whereas when a reset side signal is inputted from the common terminal 201 of the second relay contact 2 the driving circuit stops transmission of electricity to the reset coil 10. The required minimum amount of currents are thus caused to flow through the coils 9, 10 for driving the relay contacts, and relay action is accomplished as a result.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a launching relay device.

[Conventional technology]

Conventionally, latching relays have been operated as follows. That is, a first pulse generation circuit for applying a pulse voltage to the set coil and a second pulse generation circuit for applying a pulse voltage to the reset coil are provided,
When setting the relay, the first coil is connected to the set coil.
A pulse voltage is applied to the reset coil by a second pulse generating circuit, and conversely, when a reset state is to be established, a pulse voltage is applied to the reset coil by a second pulse generating circuit.

Usually, the time width of the pulse voltage applied to each coil from each pulse generating circuit is two to three times wider than the standard.

[Problem to be solved by the invention]

Therefore, in this conventional latching relay device,
Because the time width of the pulse voltage applied to each coil was two to three times wider than the standard, more current than necessary flowed through each coil, wasting power, and moreover, reliable relay operation was not guaranteed. There was a problem.

An object of the present invention is to provide a latching relay device that solves these problems and allows the minimum necessary current to flow through the coil that drives the relay contacts, thereby ensuring reliable relay operation. It is in.

[Means to solve the problem]

The present invention has a common terminal, a set side terminal, and a reset side terminal, and when a current flows through the set coil, the common terminal and the set side terminal are connected, and the common terminal and the reset side terminal are connected. is disconnected and current flows through the reset coil, the common terminal and the set side terminal are disconnected, and the common terminal and the reset side terminal are connected to the first and second latching relay contacts; A latching relay device comprising a drive circuit, wherein a set side signal is input to the set side terminal of the second relay contact, and a reset side signal is input to the reset side terminal of the second relay contact, and the drive circuit is configured to perform first control. a first latch means that energizes the set coil when a signal is input, and stops energization of the set coil when the set side signal is input from the common terminal of the second relay contact; and second launch means that energizes the reset coil when a control signal is input, and stops energization of the reset coil when the reset side signal is input from the common terminal of the second relay contact. It is characterized by

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a circuit diagram showing an embodiment of a latching relay device according to the present invention. The latching relay contact l for turning on/off a signal and the latching relay contact 2 which is a spare contact are a common terminal 101.201, a set side terminal 102.202, and a reset side terminal 103, respectively.
．． 203, when current flows through the set coil 9, the common terminal 101.201 and the set side terminal 102.202 are connected, and the common terminal lot, 201 and the reset side terminal 103.203 are respectively disconnected, and reset is performed. When current flows through the coil 10, the common terminal 101.20
1 and the set side terminal 102.202 are respectively disconnected, and the common terminal 101.201 and the reset side terminal 103.2 are disconnected.
03 are connected to each other. And common terminal 101
is connected to the signal input terminal 301, and the set side terminal 102
is connected to the signal output terminal 302. In addition, the set side terminal 202 has a logic “1” (1
-r) signal is applied to the reset side terminal 2()3, and a logic No. 13 of logic "0" (L), which is No. 13 on the reset side, is applied to the reset side terminal 2()3.

The set control circuit 3 includes a flip-flop circuit 6, a logic gate circuit 7, and a power-on reset circuit 81. A logic "1" signal is applied to the data input terminal (D) of the flip-flop circuit 6, and
The clock input terminal (C) is connected to the control signal input terminal 5, the output terminal (Q) is connected to the other end of the set coil 9 whose one end is connected to the ground, and the reset terminal (R) is connected to the output of the logic gate circuit 7. are connected to each. Further, the negative logic input terminal of the logic gate circuit 7 is connected to the common terminal 201 of the latching relay contact 2, and the other input terminal is connected to the output of the reset circuit 81.

The reset control circuit 4 includes a flip-flop circuit 11 and
It includes logic gate circuits 12 and 13 and a power-on reset circuit 82. And flip-flop circuit 1
A signal of "1" is given to the data input terminal (D) of the logic gate circuit 1, the clock input terminal (C) is connected to the control signal input terminal 5, and the output terminal (Q) is connected to the logic gate circuit 1.
A reset terminal (R) is connected to the positive logic input terminal of No. 3 and the output of the logic gate circuit 12, respectively. Further, the negative logic input terminal of the logic gate circuit 13 is connected to the output of the power-on reset circuit 82, and the output terminal is connected to the other end of the reset coil 10 whose one end is connected to the ground. One input terminal of the logic gate circuit 12 is connected to the common terminal 201 of the latching relay contact 2, and the other input terminal is connected to the output of the beam 71-circuit 82.

Next, the operation will be explained using the timing chart shown in FIG. First, when the power is turned on, the reset circuit 81
outputs a signal that is logic "0" immediately after that and becomes logic "1" after a certain period of time. Therefore, immediately after the power is turned on, the logic “
l" glue set signal C is output from the gate circuit 7, the flip-flop circuit 6 is reset and its output signal,
d becomes logic "0". On the other hand, since the reset circuit 82 similarly outputs a logic "0" signal immediately after power is turned on, the gate circuit 12 outputs a logic "1" signal e at this time. Therefore, the flip-flop circuit 11 is reset and its output signal becomes logic "0". Further, since the logic "0" signal outputted by the reset circuit 82 is also given to the gate circuit 13, the gate circuit 13 outputs the logic "1" at this time.
outputs a signal and energizes the reset coil IO. As a result, relay contact l.

2 is reset, and the common terminal 101.201 and the reset side terminal 103.203 are respectively connected.

Next, the operation when setting the relay contact l will be explained. When the control signal a (first control signal) of logic "1" is input from the control signal input terminal 5, the flip-flop circuit 6 is triggered, and its output signal d becomes logic "1".
As a result, the set coil 9 is energized. As a result, relay contact 1 has its common terminal 101 and set side terminal 10.
2 are connected, and the signal input terminal 301 and signal output terminal 3
02 is connected. At this time, relay contact 2 is also driven at the same time, and its common terminal 201 and set side terminal 202 are connected, so that a set side signal of logic "1" is input to the negative logic input terminal of gate circuit 7. As a result, the output signal C of the gate circuit 7 becomes logic "1", the flip-flop circuit 6 is reset, and its output signal d becomes logic "1".
O'' and the energization of the set coil 9 is stopped.In this way, in this latching relay device, when the relay contact is driven to the set state, the set coil 9 is immediately turned off.
Since the current flowing through the set coil 9 is stopped, the current flowing through the set coil 9 becomes the minimum necessary amount.

Next, the operation when the relay contact l is set to the reset state will be explained. When the aforementioned control signal a changes to logic "0" (second control signal), this triggers the flip-flop 11 and its output signal r becomes logic "1". At this time, the gate circuit 13 outputs a signal g of logic "1", and the reset coil 10 is energized. As a result, relay contacts 1 and 2 are driven to the reset state, and common terminal 101
．． 201 and the reset side terminal 103.203 are in a connected state.

As a result, the signal input terminal 301 and the signal output terminal 30
On the other hand, the logic “0” signal applied to the reset side terminal 203 is applied to one input terminal of the gate circuit 12. Therefore, the gate circuit 12 has a logic “
1" signal e is output, and the flip-flop circuit 11 is reset. As a result, the output signal f of the flip-flop circuit II becomes logic "0", and the output signal g of the gate circuit 13 also becomes logic "0". The energization of the reset coil 10 is stopped. That is, in this latching relay device, when the relay contact is driven to the reset state, the energization of the reset coil 10 is immediately stopped.
The current flowing through the reset coil 10 is the minimum necessary.

〔Effect of the invention〕

As explained above, the present invention has a common terminal, a set-side terminal, and a reset-side terminal, and when current flows through the set coil, the common terminal and the set-side terminal are connected, and the common terminal is connected to the set-side terminal. are disconnected, and when current flows through the reset coil, the common terminal and the set side terminal are disconnected, and the common terminal and the reset side terminal are connected to the first and second latching relay contacts, and their drive circuit. In the latching relay device, a set side signal is inputted to the set side terminal of the second relay contact, a reset side signal is inputted to the reset side terminal, and the drive circuit is set when the first control signal is inputted. energize the coil,
a first launch means that stops energizing the set coil when a set side signal is input from the common terminal of the second relay contact; and a first launch means that energizes the set coil when a second control signal is input; and second latch means that stops energization of the threshold set coil when a reset side signal is input from the common terminal of the relay contact.

Therefore, in the latching relay device of the present invention, the energization of the set coil and reset coil is stopped immediately after the relay contact is driven, so that the current flowing through each coil is the minimum necessary, and as a result, the relay operation is It will definitely be done.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the latching relay device according to the present invention, and FIG. 2 is a timing chart showing the operation of the latching relay device of FIG. 1. 1.2... Latching relay contact 3... Set control circuit 4... Reset control circuit 5... Control signal input terminal 6.11... Flip-flop circuit? , 12.13...Logic gate circuit 9...Set coil 10...Reset coil 81, 82...Power-on reset circuit lot, 2
01...Common terminal 102, 202...Set side terminal 103, 203...Reset side terminal 301...
...Signal input terminal 302 ...Signal output terminal Agent Patent attorney Yoshiyuki Iwasa

Claims (1)

[Claims] (1) Each has a common terminal, a set side terminal, and a reset side terminal, and when current flows through the set coil, the common terminal and the set side terminal are connected, and the common terminal and the reset side terminal are connected. first and second latching relay contacts in which the common terminal and the set side terminal are disconnected and the common terminal and the reset side terminal are connected when the common terminal is disconnected and a current flows through the reset coil;
In the latching relay device comprising a drive circuit, a set side signal is inputted to the set side terminal of the second relay contact, a reset side signal is inputted to the reset side terminal, and the drive circuit includes: a first latch means that energizes the set coil when a control signal is input, and stops energization of the set coil when the set side signal is input from the common terminal of the second relay contact; a second latch means that energizes the reset coil when the control signal is input, and stops energization of the reset coil when the reset side signal is input from the common terminal of the second relay contact. A latching relay device characterized by: