JPH0560209B2 - - Google Patents

Description

[Detailed description of the invention] 〔Technical field〕 This invention relates to relays.

[Background technology]

Relays are used to remotely control loads by receiving ON and OFF signals from remote control switches to open and close the load's power supply circuit. By using such a relay, you can connect multiple remote control switches to a single relay to open and close the load power supply circuit at multiple locations, or collect the relays for each load in one location. ,
It is very convenient to be able to centrally monitor the load, as it allows you to do things like this. Furthermore, since the remote control switch is insulated from the load power supply circuit, accidents such as electric shock are eliminated.

Conventionally, multi-pole relays that control multiple load circuits simultaneously have integrated multiple single-pole relays that can control only one load circuit, and have electromagnetic devices connected in parallel. The contacts were opened and closed simultaneously. However, this relay is prone to variations in operation between electromagnetic devices, which causes problems such as variations in contact closing times and time differences.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a multi-polar relay that is easy to manufacture and inexpensive, which does not cause variations in contact closing times or time differences.

[Disclosure of the invention]

In order to achieve the above object, the inventors conducted extensive studies and completed this invention.

This invention provides an electromagnetic device in which a current can flow in forward and reverse directions, a main contact mechanism for opening and closing a load circuit, and an electromagnetic device in which each contact is operated by the action of this electromagnetic device. The main contact mechanism and the auxiliary contact mechanism are equipped with a plunger whose tip is pivoted to move forward and backward in accordance with the forward and reverse direction of current flowing through the electromagnet device. The main contact mechanism faces the movable body, has a movable side main contact near one end, and connects a movable contactor that moves forward and backward as the movable body rotates forward and backward, and a load circuit connected to the movable side main contact. It consists of one terminal board to be connected and the other terminal board with a fixed main contact, and the load circuit is opened and closed by the forward and reverse rotation of the movable body as the plunger moves forward and backward. The relay is configured to switch the current direction of the electromagnetic device together with the movable body and the main contact mechanism, which are placed on the side of the movable body and the main contact mechanism and are made of the same material as the movable body and the main contact mechanism. The former movable body has the same rotation center as the latter movable body and is connected by a single connecting rod, and the body is connected to the former movable body, the main contact mechanism, and A relay characterized in that an intermediate body that accommodates the latter movable body and the main contact mechanism is sandwiched between an end body that accommodates an auxiliary contact mechanism and an electromagnet device, and a cover that covers this end body. This is the summary. Hereinafter, this will be explained in detail based on drawings showing examples thereof.

The relay according to the present invention is shown in FIGS. 1 and 2.
As shown in the figure, inside the main body 4, there is an electromagnet device 5 that can flow current in forward and reverse directions, and this electromagnet device 5.
A main contact mechanism 6 for opening and closing the load circuit, and an auxiliary contact mechanism 7 for switching the current direction of the electromagnet device 5, whose respective contacts are operated by the action of the main contact mechanism 6 for opening and closing the load circuit.
and each contact 6a, 6b of these contact mechanisms 6, 7,
Terminal plates 8, 9, 10, and 11 are provided to connect to the terminals 7a and 7b and to connect wiring (not shown) from outside the body 4. As shown in FIG. 2, the main contact mechanism 6 and the auxiliary contact mechanism 7 face a movable body 22 that operates them. The main contact mechanism 6 is
A movable contactor 23 having a movable main contact 6b near one end, one terminal plate 8 that contacts the movable main contact 6b and connects a load circuit, and a fixed main contact 6
and the other terminal plate 9 with a. The movable contactor 23 is adapted to be pushed out by the movable body 22, and the movable body 22 has one end 20a of the plunger 20 pivotally attached to its lower end. As shown in FIG. 1, projecting pieces 24, 24 are provided above the plunger end 20a of the electromagnet device 5, and pivotally fix the movable body 22. Movable body 2
2 is adapted to rotate forward and backward about this pivot point 22a, and the forward and reverse rotation is operated by forward and reverse movement of the plunger 20. The movable body 22 has a protrusion 22b on the front side in the direction in which the plunger one end 20a protrudes, and a hole 23a of the movable contact 23 (as shown in FIG. (as shown) has been accepted. The movable contactor 23 has its other end (upper end) 23b, which does not have the main contact 6b, connected to the other terminal plate 8, which is connected to the load, via a copper wire 25. Further, almost the upper half is surrounded by a first arm 26 extending from the movable body 22, and is biased toward the electromagnet device 5 by a contact pressure spring 27 fixed to the inner surface of the first arm 26.
When the plunger one end 20a protrudes and rotates the movable body 22 in the forward direction (in the direction of the arrow), the contact pressure spring 27 rotates the movable contact 23 in the positive direction (the direction of rotation of the movable body 22). It serves to bring the movable main contact 6b at the lower end into contact with the fixed main contact 6a at the tip of the fixed contact plate 9b extending from one terminal plate 8 to be connected to the load. As shown in FIG. 3, one end 20a of the plunger is retracted and the movable body
When rotating the movable contact 23 in the opposite direction, the movable contact 23 is stopped from rotating in the forward direction by a part of the side surface of the movable body 22 and the upper end 23b of the movable contact 23 coming into contact with each other. It functions to rotate the child 23 in the opposite direction (rotation direction of the movable body 22) and separate the movable main contact 6b at the lower end from the fixed main contact 6a. Furthermore, as shown in FIGS. 4 and 5c, the relay according to this embodiment has a movable body 22' and a main contact mechanism separate from the movable body 22 and the main contact mechanism 6 on the sides of the movable body 22 and the main contact mechanism 6. 6', the former movable body 22 and the latter movable body 22' have the same rotation center point (pivot point) 22a, and are connected by a single connecting rod 55. Therefore, one electromagnetic device 5 (as shown in FIG. 3)
Because the two movable bodies 22, 22' operate at the same time, there is no possibility that the contact closing times will vary or that there will be no time difference. Furthermore, since only one electromagnetic device is required, the number of parts can be reduced. The latter movable body and main contact mechanism have the same shapes and the same functions as the former movable body and main contact mechanism, so the same numbers are given to each component in the drawings. The explanation here will be omitted. In FIG. 4, reference numeral 4' designates an intermediate body for accommodating the latter movable body 22' and the main contact mechanism 6' and providing insulation between the former movable body 22 and the main contact mechanism 6. The relay in which the latter movable body 22' and main contact mechanism 6' are housed in the middle body 4' is as follows:
As shown in FIGS. 5a to 5d. Figure 5 a, b
As can be seen, four terminal boards 8, 8, 9, and 9 are provided on the load circuit side.

That is, the main contact mechanism 6' and the movable body 22' are placed on the side surface of the main body 4 in which the main contact mechanism 6, the movable body 22, the auxiliary contact mechanism 7, the electromagnet device 5, etc. are housed.
The relay is assembled by connecting a middle body 4' containing only some parts related thereto, and covering the sides of the middle body 4' with a cover 43.

As can be seen from FIG. 1, if the cover 43 is directly placed over the main body 4 in which predetermined parts are housed, a single-pole type relay can be obtained.
A two-pole type relay can be constructed by simply inserting the middle body 4' containing the above-mentioned parts 6', 22', etc. therein. If the number of middle bodies 4' sandwiched between the main body 4 and the cover 43 is increased,
It is also possible to configure a three-pole type or more other-pole type relay.

As shown in FIG. 6, the electromagnet device 5 constituting the above embodiment has a magnetic piece 17 and a permanent magnet 18 placed in corresponding positions across a coil frame 16 around which a coil 15 is wound, respectively from the inside. It is equipped with The coil frame 16, the magnetic piece 17,
17 and permanent magnets 18 and 18 are all connected to the yoke 19
wrapped in. A plunger 20 is inserted into a hole along the axial direction in the coil frame 16, and a plunger 20 is inserted into the hole 19a provided in the yoke 19.
It's starting to come in and out. plunger 20
The coil frame 16 is provided with contacts 21a and 21b extending in two directions on both outer sides of the coil frame 16. The plunger 20 is configured to move forward and backward along the axial direction of the coil frame 16 due to changes in excitation magnetism generated in each of the armatures 21a and 21b as a result of current flowing in the coil frame 15 in the forward and reverse directions. For example, both armatures 2
When the parts of the yoke 19 facing the armatures 1a and 21b are always magnetized to the S pole, a current in a certain direction flows through the coil 15, and each armature 21a and 21b
When energized to N pole and S pole, respectively, armature 2
Since the magnetic flux increases in the gap formed by 1b and the magnetic pieces 17, 17 and the gap formed between the armature 21a and the yoke 19, the plunger 20 moves in the direction of the arrow. As shown in Figure 7, coil 15
A current is applied in the opposite direction to the above, and each armature 21
When magnets a and 21b are excited to the south pole and north pole, respectively, a gap formed by the armature 21a and the magnetic pieces 17, 17 and the armature 21b and the yoke 19
Because the magnetic flux increases in the gap created by
The plunger 20 moves in the direction of the arrow, which is the opposite direction to that described above.

As shown in FIG. 2 again, above the electromagnetic device 5 in the body 4, there are auxiliary contact plates 28, 29 and a contact spring portion 30 that constitute the auxiliary contact mechanism 7, a terminal plate 11, and the auxiliary contact mechanism 7. and terminal board 11
A printed board 32 is placed on the supporting part 31 and connects the terminal board 11 and the auxiliary contact boards 28 and 29. The auxiliary contact plates 28 and 29 are connected to the printed board 32 on the other side by passing through the partition wall 31a from one side of the partition wall 31a constituting the support part 31 so as to provide a space between them. Contact springs 30a and 30b on both sides forming a contact spring section 30 fixed to the partition wall 31a are located on both sides. Each contact spring 30a, 30b is connected to the auxiliary contact plate 2.
Contact point 3 that contacts each contact point 7a, 7b of 8, 29
3 and 34, respectively. Auxiliary contact mechanism 7
is the contact spring 30a, 30b from the movable body 22.
The contact points that come into contact with each other are switched by the movement of the actuator section 35a at the tip of the second arm 35, which has been extended to the middle. That is,
The second arm 35 changes its position by moving the plunger one end 20a forward and backward as the movable body 22 rotates in the forward and reverse directions. 29 to separate them. Accordingly, only one of the two contacts formed by the contact springs 30a, 30b and the auxiliary contact plates 28, 29 is brought into contact. For example, as shown in FIG. 2, when the movable body 22 rotates in the forward direction, the actuator portion 35a releases the pressure on the upper contact spring 30a and the contact spring 30a
The contact 33 of the contact a and the contact 7a of the auxiliary contact plate 28 are brought into contact, and instead, the lower contact spring 30b is pressed to bring the contact 34 of this contact spring 30b and the contact 7b of the auxiliary contact plate 29 into contact. Release the condition to resolve it. On the other hand, as shown in FIG.
2 rotates in the opposite direction, the actuator portion 35a has a completely opposite effect to that described above. As shown in the circuit diagram of FIG. 8, the contact spring portion 30 is
One lead wire 15 of the coil 15 of the electromagnet device 5
a (shown in Figure 1). The auxiliary contact plates 28 and 29 are electrically connected to one terminal plate 11 on the operating circuit side through a printed board 32.
The other lead wire 15b (shown in FIG. 1) of the coil 15 is directly connected to the other terminal plate 10 on the operating circuit side. Further, the auxiliary contact plates 28 and 29
As shown in the figure, diodes 36 and 3 are arranged in opposite directions on the printed board 32.
7, respectively, so that only one direction of current flows. Both auxiliary contact plates 28,
29 are connected to each other via a capacitor 38 and a resistor 39, and another resistor 40 is connected in parallel to the capacitor 38. These capacitors 38 and two resistors 3
The circuit formed by 9 and 40 is a protection circuit for preventing burning or flapping of the contacts in the auxiliary contact mechanism.

As shown in FIG. 8 and FIG.
When ON current (signal) flows, the current diode 3
6, auxiliary contact plate 29, contact spring part 30, coil 1
5. Flows through the terminal plate 10. As a result, one end 20a of the plunger protrudes from the coil frame 16, closing the main contacts 6a and 6b and closing the load circuit 42, as shown in FIG. Furthermore, the movable contacts 23, 23 which are interlocked by the action of the movable pair 22 also close between the main contacts 6a, 6b, which are different from the main contacts 6a, 6b. At the same time, the auxiliary contact plate 28 and the contact spring 3
The contacts that come into contact are switched so that 0a is connected, and ON current no longer flows. Therefore, wasteful current can be eliminated. Next, as shown in FIG. 9, the relay circuit 41 is operated in the direction of arrow B to move the plunger 20.
When an OFF current (signal) is applied, the current coil 15,
Contact spring part 30, auxiliary contact plate 28, diode 3
7. Flows through the terminal plate 11. When a current is applied in the opposite direction to that described above, as shown in FIG. 3, one end of the plunger 20a is retracted into the coil frame 16 (in the direction of the arrow) and the main contacts 6a and 6b are opened. , the load circuit 42 is opened. Further, based on the same principle as described above, main contacts 6a and 6b other than the main contacts 6a and 6b are also opened. At the same time, the contacts that are in contact with each other are switched so that the auxiliary contact plate 29 and the contact spring 30b are connected, and the OFF current no longer flows. Therefore, as above, there is no waste of current. Note that the current flowing from the operating circuit to the relay circuit is a current whose voltage has been lowered by the action of the transformer.

Next, other parts constituting the above embodiment will be briefly explained based on FIG. 1. In the figure, 43 is a cover that covers the built-in parts in the body 4, 44 is a clamping screw block for connecting each terminal board 8, 9, 10, and 11, and 45 is a block provided between the terminal boards 8 and 9 on the load circuit side. The partition walls 46 and 47 are electromagnetic iron pieces 4 provided at the lower ends of the fixed contact plate 9b and the movable contact 23, respectively, and attract each other.
Reference numeral 8 denotes a manual lever (also shown in FIG. 3) provided on the head of the movable body 22 for forcibly rotating the movable body 22 in a state exposed outside the body 4, 49 one end of the plunger 20a, and an electromagnetic device. 5 protruding piece 2
Pins 4 and 24 serve as rotation axes, 50 is a caulking pin used when attaching the cover 43 to the body 4, and 51 is a blind plate that covers the opening of the spare parts storage chamber 52 provided in the body 4. , 5 is the coil frame 1 sandwiched between the cover 43 and the coil frame 16.
6 is a buffer spring for pressing against the body 4 to prevent wobbling, and 54 is a permanent plate.

In the relay according to the present invention, there is no particular limit to the number of movable bodies and main contact mechanisms arranged in parallel.

〔Effect of the invention〕

The relay according to the present invention includes an electromagnetic device that allows current to flow in forward and reverse directions, and main contacts for opening and closing the load circuit, each of which is operated by the action of the electromagnetic device. mechanism and an auxiliary contact mechanism for switching the current direction of the electromagnet device. The main contact mechanism includes a movable main contact near one end and a movable contact that moves forward and backward as the movable body rotates in the forward and reverse directions, and the movable main contact and It is composed of one terminal board to which the load circuit is connected, and the other terminal board with the fixed side main contact, and the movable body rotates in the forward and reverse directions as the plunger moves in the forward and reverse directions. The relay is designed to open and close the load circuit and switch the current direction of the electromagnet device, and is provided on the side of the movable body and the main contact mechanism, separately from the same parts as these. The former movable body has the same rotation center as the latter movable body and is connected by a single connecting rod, and the body is connected to the former movable body. and an end body that accommodates the main contact mechanism, auxiliary contact mechanism, and electromagnet device, and a cover that closes this end body, and an intermediate body that accommodates the latter movable body and the main contact mechanism. Because of this feature, the effect is that there is no possibility that the contact closing times will vary or that there will be no time lag. Furthermore, since only one electromagnetic device is required, the number of parts is reduced compared to conventional multi-pole relays.

In addition, the same components as the single-pole relay can be used for the movable body, main contact mechanism, main body, cover, etc. to configure the multi-polar relay, and the movable body and main By simply adding contact mechanisms, connecting rods, and a middle body, a multi-pole relay with any number of poles can be constructed easily and inexpensively.

[Brief explanation of the drawing]

1 and 2 are a partially exploded enlarged perspective view and an enlarged sectional view showing one embodiment of the relay according to the present invention, FIG. 3 is a sectional view showing the operation of the relay of FIG. 2, and FIG. 4 2 is a partially exploded perspective view of the relay shown in FIG. 2, and FIGS. FIG. 7 is a sectional view showing the operation of the electromagnetic device constituting the relay of FIG. 2, and FIGS. 8 and 9 are circuit diagrams of the relay of FIG. 2. 4...Body, 4a, 4b...Body opening, 5
...Electromagnetic device, 6,6'...Main contact mechanism, 6a,
6b...its contact, 7...auxiliary contact mechanism, 7a,
7b...its contact, 8, 9, 10, 11...terminal plate, 20...plunger, 20a...its one end,
22, 22'...movable body, 23...movable contact,
42...Load circuit.

Claims (1)

[Claims] 1 Inside the body, there is an electromagnet device that can flow current in the forward and reverse directions, a main contact mechanism for opening and closing the load circuit whose contacts are operated by the action of this electromagnet device, and a current direction of the electromagnet device. It is equipped with an auxiliary contact mechanism for switching, and the main contact mechanism and the auxiliary contact mechanism are attached to a movable body whose tip is pivoted to a plunger that moves forward and backward in accordance with the forward and reverse current flowing through the electromagnet device. is coming,
A main contact mechanism has a movable main contact near one end, and a movable contact moves forward and backward as the movable body rotates in the forward and reverse directions, and one terminal plate is connected to the movable main contact to connect a load circuit. , and the other terminal board with a fixed side main contact, and when the movable body rotates forward and backward as the plunger moves forward and backward, the load circuit is opened and closed, and the current direction of the electromagnet device is changed. The relay is designed to be switched, and a movable body and a main contact mechanism made of the same products are separately provided on the side of the movable body and the main contact mechanism, and the former The movable body has the same rotation center as the latter movable body, and
The bodies are connected by a single connecting rod, and between the main body that accommodates the former movable body, the main contact mechanism, the auxiliary contact mechanism, and the electromagnet device, and the cover that covers this main body, the latter movable body and a relay characterized in that a middle body accommodating a main contact mechanism is sandwiched therein.