JPH0643948Y2 - Remote control relay - Google Patents

Description

TECHNICAL FIELD The present invention relates to a remote control relay used for remote control and the like.

BACKGROUND ART FIG. 1 shows a conventional example, and a remote control relay A ′ is a relay R.
Auxiliary contact r ₁ is attached to this contact r ₁ and two diodes D ₁
The polarity was switched by D ₂ . r ₂ is a contact that opens and closes the load in conjunction with the relay R. B is a remote control switch, which is composed of the switch (4) and two diodes D ₃ D ₄ . (1) is an AC power supply. In addition, relay R
Is a one-winding latching type in which the contacts r ₁ r ₂ are switched by changing the direction of the current flowing through the coil. Here, switch (4) of remote control switch B is a diode.
When connected to the D ₃ side, the current is diode D ₃ , diode
Flows to the D ₂ and the coil of the relay R, the contact of the relay R r ₁ r ₂
Switch. Then, the diode D ₁ is turned in the opposite direction to cut off the current, and the contact r ₂ is closed to supply power to the load. Next, when the switch (4) is connected to the diode D ₄ side, a current flows through the coil of the relay R and the diodes D ₁ and D ₄ , and a current flows through the coil of the relay R in the opposite direction to the above. And the contact r ₁ is a diode
The current is cut off by switching to the D ₂ side, the contact r ₂ is also opened, and the supply of power to the load is stopped. In such a case contact r ₁
Since it is a double throw type (so-called lc type), the shape of the relay R is large and it is dedicated to the remote control relay. In order to use it in the field of home remote control systems, etc., a small relay is required, and its applications are also diverse. For example, there are many types of relays such as switch box type and delay function. Become. Therefore, if the relay was developed each time, the development cost would be high and the period would be long. Therefore, it is necessary to apply it to a remote control system using a general relay. In general relays, there is also a single-throw type (so-called a contact) relay only, which needs to be driven by a remote control switch.

[Purpose of device]

The present invention has been made in view of the above points, and an object thereof is to provide a remote control relay configured by a single throw type so-called la-type contact relay.

[Disclosure of device]

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 2 is a specific circuit diagram, where A is a remote control relay Ry and B is a remote control switch. A series circuit of a diode D ₅ , a PNP type transistor Q ₁ and a coil (2) of a one-winding latching type relay Ry is connected to the AC power source (1) via a remote control switch B. The relay Ry is inverted every time the exciting direction of the current is changed. Also, a resistor R ₁ is connected between the base and collector of the transistor Q ₁ and the diode D ₅
A series circuit of a relay Ry and a normally open contact (3) and a diode D ₆ is connected in parallel to the series circuit of the transistor Q ₁ and the transistor Q ₁ . Remote control switch B is transistor Q ₂ , thyristor
S ₁ S ₂ , LED for display LED ₁ LED ₂ , switch (6)
Etc. The switch (6) is of push-bounce type.

Now, in FIG. 2, the positive current i ₁ of the AC power supply (1) flows as shown by the broken line. That is, when the contact (3) of the relay Ry is off, the transistor Q ₂ , the light emitting diode LED ₁ , the b-side contact of the switch (6), the diode, and the diode from the AC power supply (1).
It flows through D ₅ , the transistor Q ₁ , and the coil (2) of the relay Ry. This current i ₁ is set below the sensitivity current by the resistors R ₂ R _{4 and the} like, and the light-emitting diode LED ₁ displays off by this current i ₁ . Here, remote control switch B
If the switch (6) of is connected to the a-side contact,
Due to the charging load of C ₁ , the transistor Q ₂ is turned on, the thyristor S ₁ is turned on, and the value of the current i ₁ is the relay Ry.
Flow above the sensitivity current, the coil (2) is excited, the relay Ry is turned on, and the contact (3) is closed. When the contact (3) is closed, the transistor Q ₁ turns off and the switch (6)
Returns to shut off the sensitivity current. Therefore, the thyristor
S ₁ also turns off and current i ₂ flows through diode D ₆ .
This current i ₂ is a current on the negative side opposite to the positive side of the AC power supply (1), and this current i ₂ is the current of the AC power supply (1) and the relay Ry.
Coil (2), diode D ₆ , contact (3), b-side contact of switch (6), light emitting diode LED ₂ , thyristor S ₂
Flow to. Also, with the closing of the contact (3), the contact (5)
Is closed at the same time to supply power to the load. Further, the light emitting diode LED ₂ is turned on by the current i ₂ and the load is turned on. Next, when the switch (6) is connected to the a-side contact, the thyristor is charged by the charging load of the capacitor C _1.
S ₂ is turned on, a current larger than the off-sensing current of relay Ry flows, and relay Ry is turned off. When the relay Ry is turned off, the contacts (3) and (5) are opened, the power supply to the load is stopped, the current is cut off, and the thyristor S ₂ is turned off. Then, it returns to the initial state and the current i ₁ flows.

FIG. 3 shows another embodiment of the remote control switch B, which comprises a triac Q ₃ , a transistor Q ₄ Q ₅ , a diode D ₇ D ₈ for determining the direction of current, a capacitor C, a switch SW and the like. Now, when the switch SW is off, Toraiatsuku Q ₃
Turns on and charges the capacitor C in the direction of the diode of the remote control relay A. For example, in FIG. 3, when the upper side is the positive side, the capacitor C is charged so that the base of the transistor Q ₄ is the positive side. Then, when the switch SW is turned on, the capacitor C is connected to the transistor Q ₄
Discharges to the base of to turn on transistor Q ₄ . When transistor Q ₄ turns on, switch SW diode D ₇
A current greater than the touching current of the relay Ry flows through the relay.
Ry will be reversed. Next, assuming that the bottom of FIG. 3 is the positive side, the capacitor C is charged so that the base of the transistor Q ₅ is the negative side. When the switch SW is turned on, the transistor Q ₅ is turned on, and a current larger than the touching current of the relay Ry flows through the switch SW and the diode D ₈ and
Relay Ry reverses. As described above, compared with the remote control switch of the circuit shown in FIG. 1, the remote control relay A can be controlled only by a single throw type (a contact), and a thin switch can be formed, which is applied to the field of home remote control systems. This makes it easier and eliminates the need for switch boxes, thus reducing the total cost.

FIG. 4 shows an embodiment in which the triac Q ₃ in FIG. 3 is replaced by a transistor Q ₆ Q ₇ , and the operation is the same as in the case of FIG.

[Effect of device]

As described above, the present invention turns off the switching element by a series circuit of a switching element for flowing a positive side current of an AC power source and a coil of a latching type relay, and by exciting the relay coil with a positive side current. By closing the normally open contact that shuts off the positive side current of the AC power supply and interlocks with the relay, the negative side current of the AC power supply is applied to the relay coil in the opposite direction to the positive side current by closing the normally open contact. Since it is equipped with a diode that flows and inverts the relay, and a contact that opens and closes the load by exciting the relay coil, the positive side current of the AC power supply is passed through the switching element and the relay coil. To close the normally open contact to turn off the switching element to cut off the positive side current, and also to flow the negative side current of the AC power supply through the relay coil, diode and normally open contact. By that, Can be reversed over, therefore, the normally open contact only single-throw type to OFF operation (la type)
Since the general relay can be used, the remote control relay can be downsized, and the general relay can be applied to a remote control system.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a conventional example, FIG. 2 is a concrete circuit diagram of an embodiment of the present invention, and FIGS. 3 and 4 are circuit diagrams of other embodiments of the remote control switch. (1) AC power source, (2) shows the coil, and (3) are normally open contacts, (5) contacts, Ry relay, D ₆ are diodes.

Claims (1)

[Scope of utility model registration request] 1. A series circuit of a switching element for flowing a positive side current of an AC power source and a coil of a latching type relay, and the switching element is turned off by exciting the relay coil with a positive side current. The normally open contact that shuts off the positive side current of the power supply and works with the relay, and by closing the normally open contact, the negative side current of the AC power supply is passed through the relay coil in the direction opposite to the positive side current and relayed. A remote control relay that includes a diode that inverts and a contact that opens and closes a load by exciting a relay coil.