JPH042479Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a memory circuit with confirmation using a relay, and in particular, it confirms (resets) even if either a hold signal or a single shot signal is input from the outside.
This relates to a memory circuit with confirmation that stores information until a switch is pressed.

<Prior art> First example of a conventional memory circuit with confirmation
This will be explained using the diagram and FIG.

FIG. 1 is a single shot circuit diagram for generating a single shot signal. This circuit generates a single shot signal when a hold signal is applied as an external signal. FIG. 2 is a circuit diagram showing an embodiment of a conventional memory circuit with a confirmation switch. In the case of a hold signal, the hold signal is input to the circuit shown in Figure 1 and the single shot signal is converted to the second signal.
The signal is input to the circuit shown in the figure, and in the case of a single shot signal, it is directly input to the circuit shown in FIG. 2 to form a memory circuit with confirmation.

First, the circuit shown in FIG. 1 will be explained. A relay RL ₁ , a capacitor C ₁ , a terminal T ₁ , an external switch SW ₁ , and a terminal T ₂ are connected in series between the positive power supply +V as a relay power supply and the common COM to form a series circuit. A spark extinguishing diode _D1 is connected to both ends of the relay _RL1 with a polarity opposite to the positive power supply +V. Terminal T ₁ of capacitor C ₁
A resistor _R1 is connected between the side and the positive power supply +V. On the other hand, relay RL ₁ has a first contact r ₁ ,
Both ends thereof are connected to terminals T ₃ and T ₄ .

In such a configuration, when external switch SW ₁ is turned on and hold signal S ₁ is input, the positive power supply +V, capacitor C ₁ , and external switch
SW ₁ , current flows to common COM, relay RL ₁
is excited to close contact _r1 , and a single shot signal _S2 is output between terminals _T3 and _T4 . When the external switch SW ₁ is turned off, the charge stored in the capacitor C ₁ is discharged through the diode D ₁ and the resistor R ₁ in preparation for the input of the next hold signal S ₁ .

Next, the circuit shown in FIG. 2 will be explained. The output terminals T ₃ and T ₄ of FIG. 1 are connected to the terminals T ₅ and T ₆ of FIG. 2, and the single shot signal S ₂ is input. A relay RL ₂ , terminals T ₅ and T ₃ , a contact r 1 , and terminals _{T 4 and} T ₆ are connected in series between the positive power supply +V and the common COM. Between relay RL ₂ on terminal T ₅ side and common COM, contact r _2-1 of relay RL ₂ ,
Confirmation switch SW ₂ is connected in series. A diode D ₂ is connected to both ends of the relay RL ₂ with a polarity opposite to the positive power supply +V. 2nd of relay RL ₂
The contact R _2-2 is connected to the terminals T ₇ and T ₈ and the contact output S ₃
Output.

In such a configuration, a single shot signal
When contact r ₁ is closed as S ₂ , the positive power supply +
Current flows to V, relay RL ₂ , contact r ₁ , and common COM, closing contacts r _2-1 and r _2-2 . Even if contact _r1 is closed and then opened, the positive power supply +V, contact _2-1 ,
Current flows to confirmation switch SW ₂ and common COM,
Contact output S ₃ continues to be output between terminals T ₇ and T ₈ with contact r _2-2 closed. When confirmation switch SW ₂ is pressed, the current flowing to relay R ₂ is cut off and the contact
r _2-1 and r _2-2 are released.

Therefore, if the signal input from the outside is a hold signal, it is converted to a single shot signal via the single shot circuit shown in Figure 1, and if it is a single shot signal, it is directly sent to the memory shown in Figure 2. The signal can be entered into the circuit and stored until the confirmation switch is pressed.

However, such a memory circuit with a confirmation switch has the inconvenience of having to handle the case of a single shot signal and the case of a hold signal separately, and at the same time, it is necessary to use two relays in the case of a hold signal. Along with this, the number of parts increased, which became an obstacle to miniaturization and weight reduction, and had the disadvantage of lower reliability.

<Purpose of the invention> In view of the above-mentioned conventional technology, the present invention has a simple configuration, can receive both single shot signals and hold signals with one relay circuit, and is small, lightweight, The purpose is to provide an inexpensive memory circuit with confirmation.

<Structure of the invention> The structure of the invention for achieving this purpose relates to a memory circuit with confirmation, in which a relay having a first contact and a second contact, a first diode, a capacitor, and an external switch to which an external signal is applied are connected in series. a first series circuit connected to the first series circuit, a relay power supply connected to both ends of the first series circuit, a resistor connected to both ends of the capacitor and one end of the relay power supply, and a first series circuit connected to the first series circuit;
The first contact and the confirmation switch are connected in series between the connection point of the diode and the other end of the relay power supply.
It is characterized by comprising a series circuit, a second diode connected between the connection point of the capacitor and the first diode, and one end of the relay power supply, and outputting a contact output from the second contact.

<Example> Hereinafter, an example of the present invention will be described based on the drawings. Note that parts having the same functions as those in the prior art are denoted by the same reference numerals, and redundant explanations will be omitted.

FIG. 3 is a circuit diagram showing an embodiment of the present invention. A relay is connected between the positive power supply +V and the common COM.
RL ₃ , anode of diode D ₃ , diode D ₃
The cathode of the capacitor C ₂ , the terminal T ₉ , the external switch SW ₁ and the terminal T ₁₀ are connected in sequence to form a series circuit. The first contact r _3-1 of the relay RL ₃ and the confirmation switch SW ₂ are connected in series between the connection point of the relay RL ₃ and the diode D ₃ and the common COM. A diode _D4 is connected between the connection point of the diode _D3 and the capacitor _C2 and the positive power supply +V so that the polarity is opposite to the positive power supply, and a resistor is connected between the terminal _T9 and the positive power supply +V. R ₂ is connected. The electric charge stored in the capacitor _C2 is discharged by the resistor _R2 and the diode _D4 . Inserting diode _D4 will speed up the discharge time. Also, diode D ₄ together with diode D ₃ also suppresses the spark in the coil of relay RL ₃ . The cathode of diode D ₃ is connected to the positive power supply via resistor R ₃ .
This connection causes diode _D3 to be pulled up to +V, and the reverse resistance of diode _D3 prevents the charge stored in capacitor _C2 from being discharged. The second contact r _3-2 of relay RL ₃ is a terminal
Connected to T ₁₁ and T ₁₂ , contact output is output from here.

The operation of the above configuration will be explained using the waveform diagrams shown in FIGS. 4 and 5.

FIG. 4 is a waveform diagram showing waveforms of various parts when a hold signal is input. Waveform A is the waveform of hold signal _S1 given by external switch _SW1 ,
Waveform B is a current waveform flowing through capacitor _C2 , waveform C is a voltage waveform across capacitor _C2 , waveform D is a waveform showing the operation of the first contact _r3-1 of relay _RL3 , and waveform E is a waveform of relay _RL3 . The waveform of the contact output indicating the output of the second contact _r3-2 and the waveform F indicate the operation of the confirmation switch _SW2, respectively.

First, when the external switch SW ₁ is turned on and the hold signal S ₁ shown in Figure 4A is applied, the positive power supply +
V, relay RL ₃ , diode D ₃ , capacitor C ₂ ,
Current flows through external switch SW ₁ and common COM, rapidly charging capacitor C ₂ (Figure 4B).
Therefore, the voltage across the capacitor _C2 gradually increases and reaches a constant value +V (Fig. 4C). relay
RL ₃ is the first contact due to the current flowing through capacitor C ₂ .
Close r _3-1 (Fig. 4D), and at the same time close second contact r _3-2 and send ON output to terminals T ₁₁ and T ₁₂ . capacitor
As C ₂ continues to charge and the voltage across it reaches +V, no current flows through capacitor C ₂ (Figure 4B).
Therefore, the discharge of the charge of capacitor _C2 is also a diode
Blocked by D ₃ . But the 1st of relay RL ₃
When contact _r3-1 is closed, a current circuit is formed between the positive power supply +V, first contact _r3-1 , confirmation switch _SW2, and common COM, so relay _RL3 is self-maintained (Fig. 4D). , E) Continue outputting the on output.
In this state, press confirmation switch SW ₂ (Fig. 4 F)
, the current path of relay RL ₃ is cut off, so the relay
The output of the second contact of RL ₃ is turned off (Fig. 4E).
However, the voltage across capacitor _C2 (Fig. 4C)
and the current flowing through capacitor C ₂ (Figure 4B)
There is no change in . This is because the external switch remains on and +V voltage is applied to capacitor _C2 . The relay RL ₃ does not operate until the hold signal S ₁ is turned off and then turned on again. Therefore, please check the confirmation switch once.
When SW ₂ is pressed, it will not malfunction and return to the original state after confirmation.

When external switch SW ₁ is turned off (Fig. 4A),
The charge in capacitor C ₂ is transferred to diode D ₄ and resistor R ₂
Since the current is discharged through the capacitor _C2 , a discharge current flows through the capacitor C2 (FIG. 4B) and finally becomes zero. Along with this, the voltage across the capacitor _C2 also becomes zero (Fig. 4C).

FIG. 5 is a waveform diagram showing the waveform when a single shot signal is input. Waveform A is a single shot signal given by external switch _SW1 .
The waveform of SW ₂ , waveform B is the current waveform flowing through capacitor C ₂ , waveform C is the voltage waveform across capacitor C ₂ , waveform D is the waveform showing the operation of the first contact r _3-1 of relay RL ₃ , waveform E 2 shows a contact output waveform indicating the output of the second contact _r3-2 of the relay RL ₃ , and waveform F shows the waveform indicating the operation of the confirmation switch _SW2 .

First, when the single shot signal _S2 shown in FIG. 5A is applied, with the external switch _SW1 turned on and then turned off, the single shot signal
When S ₂ is turned on, the operation is exactly the same as in Fig. 4, the voltage across capacitor C ₂ becomes +V (Fig. 5 C), and each contact r _3-1 , r of relay RL _{3 3-2}
is turned on as shown in Figure 5 D and E, and relay RL ₃
is self-maintained. In this state, the external switch
Even if SW ₁ is turned off (Fig. 5A), relay RL ₃
Positive power supply +V, first contact R _3-1 , confirmation switch
Since current is flowing through SW ₂ and the common COM, the relay RL ₃ remains self-holding (FIG. 5D), and the second contact r _3-2 continues to output an ON output. But the charge on capacitor C ₁ is transferred to diode D ₄ ,
Discharge occurs through resistor _R2 , and a discharge current flows (fifth
Figure B), and finally the voltage across capacitor _C1 becomes zero (Figure 5C).

At this point, confirmation switch SW ₂ is turned off (fifth
When the current path reaches Figure F), the current path of relay RL ₃ is cut off and it turns off (Figure 5 D), and at the same time, the second contact r _3-2
Output more off output (Fig. 5E). In this state, capacitor C ₂ has no charge and external switch SW ₁
Since is off, the voltage across capacitor _C2 also remains unchanged (Figure 5C).

<Effects of the invention> As explained above in detail with the embodiments, according to the invention, one relay can be used for both single-shot signals and hold signals, and is simpler than conventional methods. Since a memory circuit with confirmation can be realized with a simple configuration, it is possible to significantly reduce costs when used in an annunciator or the like that requires a large number of memory circuits.

[Brief explanation of drawings]

Fig. 1 is a conventional single shot circuit diagram for generating a single shot signal, Fig. 2 is a circuit diagram showing an embodiment of a conventional memory circuit with a confirmation switch, and Fig. 3 is a circuit diagram showing an embodiment of the present invention. Figure 4 is a waveform diagram showing the waveform of each part when the hold signal is input in Figure 3, and Figure 5 is a waveform diagram showing the waveform when the single shot signal is input in Figure 3. be. +V...Positive power supply, RL ₁ ~ RL ₃ ...Relay, r _3-1
...1st contact, r _3-2 ...2nd contact, D ₁ to _{D 4} ... diode, C ₁ , C ₂ ... capacitor, SW ₁ ... external switch, SW ₂ ... confirmation switch, R ₁ ~ _R3 ...
…resistance.

Claims (1)

[Scope of utility model registration request] a first series circuit in which a relay having a first contact and a second contact, a first diode, a capacitor, and an external switch to which an external signal is applied are connected in series; and a relay power supply having both ends connected to the first series circuit. , a resistor connected to both ends of the capacitor and one end of the relay power supply, and a first contact and a confirmation switch connected in series between a connection point between the relay and the first diode and the other end of the relay power supply. a second series circuit connected thereto, and a second diode connected between a connection point between the capacitor and the first diode and one end of the relay power supply,
A memory circuit with confirmation, characterized in that a contact output is output from the second contact.