JPH0546196Y2 - - Google Patents

Description

[Detailed explanation of the idea] 〔Technical field〕 This idea concerns 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.

As shown in FIG. 1a, a conventional relay has a body opening 1 for connection provided above terminals (not shown) for connecting a load circuit and an operating circuit.
A plate-shaped terminal cover 2a as shown in FIG. 2 was attached so that it could be opened and closed. This terminal cover 2 is
It had protrusions 2a whose width was larger than their thickness at corresponding positions on both sides. This terminal cover 2
As shown in FIGS. 1a, b and 3, the protrusions 2a, 2a are inserted into the keyholes 3, 3, which are bored at corresponding positions on both side walls of the body opening 1, and the keyholes are opened. The body opening 1 was designed to be opened and closed using rotation centers 3 and 3. Further, terminal covers 2 are provided on both side walls of the body opening 1, respectively.
A protrusion 1a for preventing upward rotation is provided, and the terminal cover 2 is semi-fixed in pressure contact with both side walls of the opening 1 at a position below the protrusion 1a. However, this terminal cover 2
There has been a problem in that the protrusions 2a, 2a easily slip out of the narrow portions of the keyholes 3, 3 when rotated during wire connection.

[Purpose of invention]

Therefore, the object of this invention is to provide a relay whose terminal cover is easy to attach and which is difficult to come off during wiring.

[Disclosure of invention]

In order to achieve the above objectives, the inventors conducted extensive research and completed this idea.

This idea consists of an electromagnetic device that allows current to flow in the forward and reverse directions, a main contact mechanism for opening and closing the load circuit, and an electromagnetic device whose respective contacts are operated by the action of this electromagnetic device. It is equipped with an auxiliary contact mechanism for switching the current direction, and terminals that connect to each contact of these contact mechanisms and connect wiring from outside the body, and the body opening where these terminals are exposed is covered with an insulating terminal cover. The terminal cover is attached so that the protrusions on both sides of the terminal cover are inserted into holes drilled in both side walls of the body opening, and the terminal cover is attached by inserting the protrusions on both sides of the terminal cover into holes drilled in both side walls of the body opening. The relay is configured to open and close, and the hole has a rotation center part formed deeper than the terminal cover insertion part, and the terminal cover has an inner part on the side edge on the rotation center side. It is characterized by having a cutout groove extending toward the hole, and the protrusion is attached by being press-fitted into the rotation center portion of the hole against the elasticity of both sides of the cutout groove. The gist is relay. Hereinafter, this will be explained in detail based on drawings showing examples thereof.

The relay according to this invention is shown in Figures 4 and 5.
As shown in Figures a to d, there is an electromagnet device 5 in the body 4 that allows current to flow in forward and reverse directions, and the contacts are operated by the action of the electromagnet device 5. The main contact mechanism 6 and the auxiliary contact mechanism 7 for switching the current direction of the electromagnet device 5, and the respective contacts 6a, 6 of these contact mechanisms 6, 7.
terminal boards 8, 9, 10, which are connected to terminals b, 7a, 7b and connect wiring (not shown) from outside the body 4;
It is equipped with 11. These terminal boards 8, 9, 1
The body openings 4a and 4b in which the terminals 0 and 11 are exposed are each covered with an insulating terminal cover 12.
(Illustration is omitted in FIG. 4). This terminal cover 12
As shown in Figures 7a, b to 9,
The protrusions 12a, 12a on both sides of the body openings 4a, 4b are inserted into keyholes 13, 13 formed in both side walls of the body openings 4a, 4b, respectively. Further, the body openings 4a, 4b are opened and closed using the keyholes 13, 13 as rotation centers. In each of the keyholes 13, a round hole portion 13b, which is a rotation center portion, is formed deeper than a narrow groove portion 13a, which is a terminal cover insertion portion. The terminal cover 12 has a notch groove 12b extending inward on the side edge on the rotation center side, and the protruding portion 12b resists the elasticity of both sides of the notch groove 12b.
2a and 12a are press-fitted into the round holes 13b of each of the keyholes 13, respectively. Therefore, by utilizing the elasticity of both sides of the notch groove 12b, the terminal cover 12 can close the keyhole 1 in the side walls of the body openings 4a, 4b.
3 and 13, the terminal cover 12 can be easily attached to the body 4. Further, the round hole portion 13b of the keyhole 13, which is the rotation center portion of the terminal cover 12, is connected to the terminal cover 12.
Because it is formed deeper than the narrow insertion groove 13a, the protrusion 12a of the terminal cover 12 once inserted
This prevents the terminal cover 12 from slipping out of the narrow groove portion 13a even during rotation, making it difficult for the terminal cover 12 to come off. In the figure, 14 is a protrusion that prevents the terminal cover 12 from rotating upward.

The electromagnet device 5 constituting the above embodiment is the 10th
As shown in the figure, magnetic pieces 17 and permanent magnets 18 are provided at corresponding positions sandwiching the coil frame 16 around which the coil 15 is wound, in order from the inside. Then, the coil frame 16, the magnetic piece 1
7 and 17 and permanent magnets 18 and 18 are all surrounded by a yoke 19. A plunger 20 is inserted into a hole along the axial direction within the coil frame 16,
Holes 19a, 19 provided in the yoke 19
It is designed to enter and exit a. plunger 20
The coil frame 16 is provided with armatures 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 the change in excitation polarity generated in each armature 21a, 21b in accordance with the current flowing in the coil 15 in the forward and reverse directions. For example, both armatures 21
When the parts of the yoke 19 facing the a and 21b are always magnetized to the south pole, when a current in a certain direction is passed through the coil 15 and the armatures 21a and 21b are excited to the north and south poles, respectively, Armature 21
Since the magnetic flux increases in the gap formed by the armature 21b 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 11, the coil 15
A current is applied in the opposite direction to the above, and each armature 21
When a and 21b are excited to S and N poles, respectively, the magnetic flux increases in the gap formed by the armature 21a and the magnetic pieces 17, 17 and the gap formed between the armature 21b and the yoke 19, so that the plunger 20 moves in the direction of the arrow, which is the opposite direction to the above.

The main contact mechanism 6 and the auxiliary contact mechanism 7 face the movable body 22 to be operated, as shown in FIG. 5c. The main contact mechanism 6 includes a movable contactor 23 having a rotating main contact 6b near one end, and one terminal plate 9 that contacts the movable main contact 6b and connects a load circuit. Movable contact 23
is adapted to be pushed out by the movable body 22, and the movable body 22 has one end 20 of the plunger 20 at its lower end.
A is pivoted. As shown in FIG. 4, projecting pieces 24, 24 are provided above the plunger end 20a of the electromagnet device 5, and the movable body 22
It is pivoted. The movable body 22 is connected to this pivot point 22
It is designed to rotate forward and backward around a.
The forward and reverse rotation is controlled 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. Also,
A first arm 2 whose upper half extends from a movable body 22
6, and is biased in the direction toward the electromagnet device 5 by a contact pressure spring 27 fixed to the inner surface of the first arm 26. As shown in FIG.
2) and connects the movable main contact 6b at its lower end to the load.
The main contact 6a on the fixed side at the tip of the fixed contact plate 9b extending from the contact plate 9b is brought into contact with the main contact 6a on the fixed side. As shown in FIG. 6b, when the plunger one end 20a retracts and rotates the movable body 22 in the opposite direction, the movable body 22
After the rotation of the movable contact 23 in the forward direction is stopped due to the contact between a part of the two side surfaces and the upper end 23b of the movable contact 23, the movable contact 23 is rotated in the reverse direction (the rotation direction of the movable body 22). ), and move the movable main contact 6b near the lower end to the fixed main contact 6a.
It functions to separate from

As shown in Figures 4 and 5c, the body 4
Above the electromagnet device 5 inside, there are auxiliary contact plates 28, 29, a contact spring part 30, and a terminal plate 11 that constitute the auxiliary contact mechanism 7, and a support part 31 for fixing the auxiliary contact mechanism 7 and the terminal plate 11. This support part 3
1, terminal plate 11 and auxiliary contact plate 2
A printed board 32 is provided to connect the terminals 8 and 29. The auxiliary contact plates 28 and 29 are connected to the partition wall 3 constituting the support portion 31 with a space provided between them.
Contact springs 30a and 30b on both sides of the contact spring part 30 are connected to the printed board 32 on the other side by penetrating the partition wall 31a from one side of 1a, and are fixed to the partition wall 31a on both upper and lower sides. is located. Each contact spring 30a, 30b is
It has contacts 33 and 34 that come into contact with the contacts 7a and 7b of the auxiliary contact plates 28 and 29, respectively. The auxiliary contact mechanism 7 connects the movable body 22 to the contact spring 30.
The second arm 35 extends between a and 30b.
The movement of the actuator section 35a at the tip switches the contacts that come into contact with each other.
That is, the second arm 35 has one end 2 of the plunger.
The position changes as the movable body 22 rotates in the forward and reverse directions due to the forward and reverse movement of the contact spring 30a,
30b is pressed to separate from either one of the auxiliary contact plates 28, 29. Accordingly, the contact springs 30a, 30b and the auxiliary contact plate 2
8 and 29, only one of the two contacts is brought into contact. For example, as shown in FIG. 5c, when the movable body 22 rotates in the forward direction, the actuator section 35a releases the pressure on the upper contact spring 30a and connects the contact 33 of the contact spring 30a and the auxiliary contact. Contact point 7a of plate 28 is brought into contact with contact point 7a of plate 28, and instead, contact point 3 of this contact spring 30b is pressed by pressing contact point 30b on the lower side.
4 and the contact 7b of the auxiliary contact plate 29 are separated so as to release the contact between them. On the other hand, when the movable body 22 rotates in the opposite direction, as shown in FIG.
and the contact 7a is opened. The contact spring 30 is
As shown in the circuit diagram of Fig. 12, the electromagnet device 5
It is connected to one lead wire 15a of the coil 15 (shown in FIG. 4). Auxiliary contact plate 28, 29
is electrically connected to one terminal board 11 on the operating circuit side through a printed board 32. coil 15
The other lead wire 15b (shown in FIG. 4) is directly connected to the other terminal board 10 on the operating circuit side.
Further, as shown in FIG. 4, the auxiliary contact plates 28 and 29 are respectively connected to diodes 36 and 37 arranged in opposite directions on the printed circuit board 32, so that only one direction of current flows. It's becoming like that. 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. A circuit formed by the capacitor 38 and the two resistors 39 and 40 is a protection circuit for preventing the contacts from burning or flapping together in the auxiliary contact mechanism.

As shown in FIGS. 12 and 6b, when an ON current (signal) in the direction of arrow A that moves the plunger 20 flows through the relay circuit 41, the current flows through the diode 36, the auxiliary contact plate 29, and the contact spring part 30. , coil 15, and terminal plate 10. As a result, one end 20a of the plunger projects from the coil frame 16 in the direction of the arrow, closing the main contacts 6a and 6b and closing the load circuit 42, as shown in FIG. 5c. At the same time, the contacting contacts are switched so that the auxiliary contact plate 28 and the contact spring 30a are connected, and ON current no longer flows. Next, as shown in FIG.
When a current (signal) is applied, the current passes through the coil 15, contact spring section 30, auxiliary contact plate 28, diode 37,
It flows through the terminal plate 11. In this way, when a current is applied in the opposite direction to the above, one end 20a of the plunger is retracted into the coil frame 16 (in the direction of the arrow) and the main contacts 6a and 6b are closed, as shown in FIG. 6b. The load circuit 42 opens. At the same time, the contacting contacts are switched so that the auxiliary contact plate 29 and the contact spring 30b are connected to each other,
OFF current no longer flows. 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. 4. 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 FIGS. 6a and 6b), which is provided on the head of the movable body 22 and forcibly rotates the movable body 22 in a state exposed outside the body 4;
is a pin serving as a rotation axis of the plunger end 20a and the protruding pieces 24, 24 of the electromagnet device 5;
50 is a caulking pin used when attaching the cover 43 to the body 4; 51 is a blind plate that covers the opening of the spare parts storage chamber 52 provided in the body 4;
3 is a buffer spring which is sandwiched between the cover 43 and the coil frame 16 and presses the coil frame 16 against the body 4 to prevent wobbling; 54 is a permanent plate.

There are no particular limitations on the structure inside the body, such as the electromagnetic device, main contact mechanism, auxiliary contact mechanism, etc. that constitute the relay according to this invention.

[Effect of idea]

In the relay according to this invention, the body opening through which the terminal is exposed is covered with an insulating terminal cover, and the protruding parts on both sides of the terminal cover are inserted into holes drilled in both side walls of the body opening. The relay is mounted in this way and opens and closes the body opening using this hole as the center of rotation, and the hole has a portion for the center of rotation deeper than a portion for inserting the terminal cover. The protruding portion of the terminal cover, once inserted, will not come out of the hole even when the terminal cover is rotated, resulting in the effect that the terminal cover will be difficult to come off. Further, the terminal cover has a notch groove facing inward on the side edge on the rotation center side, and the protruding portion is press-fitted into the rotation center portion of the hole against the elasticity of both sides of the notch groove. Since the terminal cover can be easily attached to the terminal cover body, the terminal cover can be easily inserted into the hole, and therefore, the terminal cover can be easily attached to the terminal cover body.

[Brief explanation of the drawing]

1A and 1B are a partially enlarged sectional view and a partially enlarged plan view showing the body of a conventional relay; FIG. 2 is an enlarged plan view showing a conventional terminal cover;
Fig. 3 is a partially enlarged perspective view showing a conventional relay, and Figs. 4 and 5 a, b, c, and d are exploded enlarged perspective views showing an embodiment of the relay according to this invention, with the terminal cover removed. Enlarged plan view of ivy state,
Enlarged left side view, enlarged sectional view and enlarged right side view,
Figures 6a and 6b are a plan view and a sectional view with the terminal cover removed, showing the operation of the relay in Figure 5;
7a and b are a partially enlarged sectional view and a partially enlarged plan view showing the body of the relay shown in FIG. 5; FIG. 8 is an enlarged plan view showing a terminal cover constituting the relay shown in FIG. 5; The figure is a partially enlarged perspective view showing the relay in Figure 5, Figures 10 and 11.
This figure is a sectional view showing the operation of the electromagnetic device constituting the relay of FIG. 5, and FIGS. 12 and 13 are circuit diagrams of the relay of FIG. 5. 4...Body, 4a, 4b...Body opening, 5
...Electromagnetic device, 6...Main contact mechanism, 6a, 6b
...The contact, 7...Auxiliary contact mechanism, 7a, 7b
...The contacts, 8, 9, 10, 11...Terminal board,
12...Terminal cover, 12a...Protrusion thereof, 1
2b...The notch groove, 13...Keyhole, 13a...
Narrow groove part (terminal cover insertion part), 13b...Round hole part (rotation center part), 20...Plunger,
20a... one end, 22... movable body, 23...
Movable contactor, 42...Load circuit.

Claims (1)

[Claims for Utility Model Registration] (1) Inside the body, there is an electromagnetic device that can flow current in the forward and reverse directions, and a load circuit switching device whose contacts are operated by the action of this electromagnetic device. It is equipped with a main contact mechanism, an auxiliary contact mechanism for switching the current direction of the electromagnet device, and terminals that connect to each contact of these contact mechanisms and connect wiring from outside the body, and there is an opening in the body through which these terminals are exposed. is covered with an insulating terminal cover, and the terminal cover is attached by inserting protrusions on both sides of the terminal cover into holes protruding from both side walls of the body opening, and
The relay is designed to open and close the body opening with this hole as the rotation center, and the hole has a rotation center portion deeper than the terminal cover insertion portion, and the terminal cover The side edge on the rotation center side has a notch groove facing inward, and the protrusion is mounted by press-fitting into the rotation center portion of the hole against the elasticity of both sides of the notch groove. A relay that is characterized by its shape. (2) The main contact mechanism and the auxiliary contact mechanism face a movable body to which a plunger, which moves forward and backward in response to the forward and reverse current flowing through the electromagnetic device, has its tip pivoted, and the main contact mechanism is near one end. a movable contact that is provided with a movable main contact and moves forward and backward as the movable body rotates in the forward and reverse directions, one terminal plate that connects to the movable main contact and connects a load circuit, and a fixed main contact. The movable body rotates forward and backward as the plunger moves forward and backward, thereby opening and closing the load circuit and switching the current direction of the electromagnet device. The relay according to claim 1 of the utility model registration claim.