JPS6240523Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of an electromagnetic relay that improves the insulation between an electromagnet section and a contact spring assembly section that are arranged in parallel.

A conventional method in which an electromagnet section having a swingable armature and a contact spring assembly section having a movable contact spring are arranged side by side, and the armature operates the movable contact spring via a card made of an insulating material. In an electromagnetic relay, for example, as shown in FIG. 1, a coil 5 is connected via a yoke 4 to a terminal plate 3 made of an insulating material on which a plurality of fixed contact springs 1 and 1' and a movable contact spring 2 are attached. An L-shaped armature 8 to which a wound bobbin 6 and iron core 7 are attached, and whose bent portion is engaged with one end of the L-shaped yoke 4
One end of the card 9 is inserted into the vicinity of the end of the vertical plate portion of the armature 8, and the other end of the card 9 is inserted into the movable contact spring 2. When the electromagnetic relay 10 is stopped, the vertical plate portion of the armature 8 is pressed by the elastic force of the movable contact spring 2 having spring properties through the card 9, and the upper end surface of the iron core 7 and the armature opposite thereto are pressed. It is separated from the plane No. 8 by a predetermined distance, and that state is maintained.
On the other hand, when the iron core 7 is excited by passing a predetermined current through the coil 5, the armature 8 rotates around its bent portion, and the upper end surface of the iron core 7 and the flat surface of the armature 8 are brought into contact with each other. At the same time, the vertical plate portion of the rotated armature 8 presses the movable contact spring 2 in the direction of arrow A through the card 9, so that the vertical plate portion of the armature 8 that has been rotated presses the movable contact spring 2 in the direction of arrow A. The movable contact spring 2 is separated, and the fixed contact spring 1' and the movable contact spring 2 are newly connected via a contact.

However, in recent years, electromagnetic relays have tended to be smaller in size, similar to electronic circuit components such as semiconductor devices, and with this trend, if the electromagnet part and the contact spring assembly are placed too close to each other, the insulation withstand voltage characteristics will deteriorate. As a result, stable contact switching operation becomes impossible. Therefore, electromagnetic relays have conventionally been constructed as shown in FIGS. 2 to 4 to address the above-mentioned drawbacks.

Hereinafter, the electromagnetic relays shown in FIGS. 2 to 4 will be explained one by one. FIG. 2 shows an electromagnetic relay 12 in which an electromagnet part and a contact spring assembly part are separated by a partition plate 11 made of an insulating material, and the electromagnetic relay 12 is formed integrally with a terminal plate 13 or inserted into the terminal plate 13. An opening through which a card 16 is inserted is provided in the center of a partition plate 11 that is installed and partitions the armature 14 and the fixed contact spring 15 that is close to the armature 14 . However, the cover has been removed.

On the other hand, in the electromagnetic relay 17 shown in FIG. 3, the electromagnet part and the contact spring assembly part are separated by the card 18, which is L-shaped in side view, and the central vertical plate part 19a of the cover 19. In FIG. 3, a card 18 formed by molding an insulating material has a lower end 18a engaged with a groove 20a etc. provided on the upper surface of a terminal board 20,
The tip portion 18b extending laterally is a movable contact spring 21.
It is inserted into the hole provided in the. At the same time, the hanging plate portion having the lower end portion 18a has the hanging plate end 2 of the L-shaped armature 22.
2a will come into contact with each other. The cover center hanging plate portion 19a and the card 18 partition the armature 22 and the fixed contact spring 23 adjacent to the armature 22.

On the other hand, in the electromagnetic relay 24 shown in FIG. 4 with the card removed, the flat armature 25 of the electromagnet section is provided on the opposite side from the contact spring assembly, and a partition is provided between the electromagnet section and the contact spring assembly. It is constructed by disposing an insulating film 26. In FIG. 4, the iron core 27 has a head that protrudes to the side opposite to the contact spring set, and the armature 25 has a flat surface facing the side end surface of the head, and the armature 25 engages the lower end 25a with the yoke 28. It is made possible to swing. Then, the card 29, whose both ends are engaged with the armature 25 and the movable contact spring 30 near the upper ends thereof, straddles the iron core 27 and the fixed contact spring 31.

The electromagnetic relays shown in FIGS. 2 to 4 above have achieved certain effects for the purpose of improving insulation withstand voltage characteristics. However, in the electromagnetic relay 12 shown in FIG. 2, there is a passage that passes between the card 16 and the card insertion opening of the partition plate 11 and goes straight from the armature 14 to the fixed contact spring 15, so the withstand voltage characteristics are not sufficiently improved. do not have. Further, the electromagnetic relays 17 and 24 shown in FIGS. 3 and 4 have a complicated structure, which makes it difficult to increase production efficiency.

The purpose of the present invention is to eliminate the above-mentioned problems.The purpose of this invention is to provide an electromagnet section and a contact spring assembly section adjacent to each other on a terminal board so that the armature swings through the card. The movable contact spring works together,
In the electromagnetic relay in which the contacts of the contact spring assembly operate to open and close, the terminal plate is provided with a partition plate having an insertion opening for the card so as to partition the electromagnet part and the contact spring assembly part. The card is integrally formed substantially upright with respect to the partition plate, and the card is integrally provided with a flange that extends substantially parallel to the partition plate and covers the insertion opening gap when the card is inserted into the insertion opening. This is achieved by providing an electromagnetic relay that

The present invention will be described below with reference to drawings showing embodiments of the present invention.

FIG. 5 is a perspective view with the cover removed of an electromagnetic relay according to an embodiment of the present invention, and FIG. 6 is an exploded perspective view with a part of the electromagnetic relay omitted.

In FIGS. 5 and 6, an electromagnetic relay 41 is composed of an electromagnet section 42, a contact spring assembly section 44 mounted on a terminal plate 43, a card 45, and the like. The electromagnet section 42 includes a bobbin 47 around which a coil 46 is wound.
It consists of an L-shaped yoke 49 equipped with a cylindrical iron core 48, and an L-shaped armature 51 whose bent portion engages with the upper end recess 50 of the yoke 49. Armature 51
In this figure, a through hole 53 into which a protrusion 52 provided at one end of the card 45 is inserted is formed in the hanging plate part shown, and a recess 56 into which the tip 55 of the presser spring 54 engages is provided outside the bent part. . The terminal plate 43 formed by molding an insulating material is the illustrated horizontal plate portion 49a of the yoke 49.
The recess 57 into which the yoke 49 is inserted and the side extension of the hanging plate part of the yoke 49 (one side is hidden and cannot be seen in the figure)
The coil terminal 74 inserted into the yoke 49 and the terminal hole 60' is attached to the terminal plate 43 by injecting adhesive into the grooves 58 and 59 into which the lower portions of the yoke 49b fit and into the recess 57.
A through hole 60 for adhesively fixing to the contact spring 63 and a partition plate 61 higher than the fixed contact spring 63 are integrally molded. At the same time, a pair of movable contact springs 62 and a pair of fixed contact springs 63 and 64, which respectively face each movable contact spring 62 and sandwich it therebetween, are disposed upright to form a contact spring assembly 44. .
The card 45 formed by molding an insulating material has a protrusion 52 at the center of one side of the flange 65, and protrusions 6 protruding from the vicinity of the left and right ends of the other side.
6 and 67. A card protrusion 6 is provided on the side of the central part of the partition plate 61 and the fixed contact spring 63.
Semi-circular cutout relief parts 68 and 6 for 6 and 67
9 and the center of the movable contact spring 62 are provided with through holes 70 into which the tip ends 66a and 67a of the card protrusions 66 and 67 are inserted, respectively. Further, when the lateral widening portion of the presser spring 54 made of a spring material and approximately T-shaped in plan view is fitted into the T-shaped groove 72 provided at the center of the upper part of the partition plate 61, the presser spring 54 is The raised cut 75 is locked in the groove 72. Then, the yoke 49 with the iron core 48 etc. attached is attached to the terminal plate 43, and after fitting the bent part of the armature 51 into the yoke recess 50, the presser spring 54 is inserted into the partition plate T-groove 72. When the presser spring 54 is attached, its tip 55 fits into the armature recess 56, and the armature 5
1 into the yoke recess 50, the armature 51 is held in engagement with the yoke 49 so as to be able to swing.

Note that 73 in the figure is an insulating member that partitions two groups of contact springs in which one fixed contact spring 63, one movable contact spring 62, and one fixed contact spring 64 are arranged in parallel, and the hidden lower part of the insulating member 73 is , which are hidden and fitted into the upper surface of the terminal plate 43 and the groove of the partition plate 61 (not shown). Further, a pair of mutually opposing conductor terminals 74 are approximately Z-shaped conductor terminals, and the terminals 74 are attached to the bobbin 47 and the coil 4
One end and the other end of 6 are connected by soldering, respectively. Further, 62a to 64a are contact springs 62
- 64 are the parts that protrude downward from the terminal plate 43 when attached to the terminal plate 43, and the electromagnetic relay 41 is connected to an external circuit and driven via the terminal 74 and the protruding parts 62a to 64a.

Next, a procedure for assembling the electromagnetic relay 41 will be explained. When assembling a conventional electromagnetic relay 10 (FIG. 1) in which a movable contact spring is operated via a card, it is necessary to assemble a horizontally installed terminal board 3, similar to an electromagnetic relay of a similar structure that does not include a card 9. Attach the contact spring assembly consisting of the fixed contact springs 1 and 1' and the movable contact spring 2, then attach the electromagnet section consisting of the yoke 4, armature 8, etc. to the terminal plate 3, and then insert the card 9. I was wearing it. This assembly procedure was carried over to the electromagnetic relay 12 (Fig. 2), but the card is attached by fitting both ends into the yoke and the movable contact spring, respectively, and the electromagnet and contact spring assembly are connected to the terminals. This is because it is not held until it is attached to the plate, and this is because the conventional assembly apparatus was configured in this way. Therefore, the electromagnetic relay 10
Alternatively, when assembling the card 12, when inserting the card 9 or 16, care must be taken not to deform the contact spring made of a relatively thin plate, making it impossible to improve the efficiency of the assembly process. Therefore, when assembling the electromagnetic relay 41 according to the present invention, FIG.
We adopted the procedure shown in the main assembly process diagram of c. That is, in FIG. 7a, the terminal plate 43 equipped with a contact spring set consisting of fixed and movable contact springs is placed in an upright position, and the card 45 is fed into a predetermined position from above. Then, the protruding tips 66a and 67a of the card 45 are fitted into the through holes 7 (FIG. 6) of each movable contact spring 62, as shown in FIG. 7b. Thereafter, a yoke 49 equipped with a bobbin 47 wound with a coil 46 and an iron core 48 is supplied from the side. Then, the yoke horizontal plate portion 49a (which is in an upright position in the figure) is fitted into the terminal plate recess 57, and the yoke lateral expansion 49b is aligned with the terminal plate groove 58 and the terminal plate groove 58.
Attach it so that it fits into 9. Then the seventh
As shown in Figure c, after engaging the bent part of the armature 51 with a predetermined part of the yoke 49 and attaching the presser spring 54 to the partition plate 61, a cover (not shown) is attached, and the assembly work is completed smoothly. Ru.

In the above embodiment, the flange 65 of the card 45 is configured to be located between the partition plate 61 and the armature 51, but the protrusion 6 of the card 45
6 and 67 may be made a little shorter, the protrusion 52 may be lengthened accordingly, and the flange 65 may be located between the partition plate 61 and the fixed contact spring 63. However, in that case, the assembly involves first attaching the electromagnet yoke to the terminal board, then inserting the card into the upright terminal board with the electromagnet facing down, and then attaching the contact spring assembly last. This is the assembly procedure for installing it. Further, although the electromagnetic relay 41 has a contact spring set made up of two groups of contact springs, the present invention can be applied to an electromagnetic relay in which the contact spring set is made up of only one group or three or more groups. is clear. Furthermore, the card insertion opening provided in the partition plate 61 is not a side cutout 68 as in the embodiment, but a through hole is provided in the center of the partition plate 61, and a protrusion of a card, for example, the card 45, that fits into the through hole is provided. The armature and the movable contact spring may be interlocked by using bent cards 66 and 67 whose base parts are integrated and which are led out from the center of the flange 65.

As explained above, according to the electromagnetic relay of the present invention, the lateral extension flange formed integrally on the card is connected between the card insertion opening formed in the partition plate integrally formed on the terminal board and the card insertion hole. Since there is no direct passage from the electromagnet part to the contact spring assembly part, the shortest creepage distance connecting the two parts is extended, and a compact electromagnetic relay with excellent dielectric withstand voltage characteristics can be provided at a low cost. The practical effects of doing so are extremely large.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the basic structure of an electromagnetic relay equipped with a card, Figs. 2 to 4 are schematic diagrams showing the structure of the conventional electromagnetic relay with improved dielectric withstand voltage characteristics, and Fig. 5 is a schematic diagram showing the structure of the electromagnetic relay according to the present invention. FIG. 6 is an exploded perspective view with the electromagnetic relay of FIG. 5 partially omitted;
FIG. 7 is an explanatory view of the main steps for assembling the electromagnetic relay shown in FIG. 5. Explanation of symbols, 1, 1', 15, 23, 31, 6
3, 64...Fixed contact spring, 2, 21, 30, 6
2...Movable contact spring, 3, 13, 20, 43...
Terminal board, 4, 28, 49... Yoke, 5, 46...
Coil, 6, 47... Bobbin, 7, 27, 48...
...Iron core, 8, 14, 22, 25, 51... Armature, 11, 61... Partition plate, 9, 16, 18, 2
9, 45...Card, 42...Electromagnet section, 44...
... Contact spring assembly, 65 ... Card flange, 6
8, 69... Notch (card insertion opening).

Claims (1)

[Scope of utility model registration request] An electromagnet section including a swingable armature and a contact spring assembly section including a movable contact spring are arranged adjacent to each other on a terminal board, and the swinging of the armature causes the movable contact spring to move through the card. In the electromagnetic relay in which the contacts of the contact spring assembly operate in conjunction with each other to open and close, the terminal plate includes a partition plate having an insertion opening for the card so as to partition the electromagnet part and the contact spring assembly part. is integrally formed substantially upright with respect to the terminal plate, and the card is integrally provided with a flange that extends substantially parallel to the partition plate and covers the insertion opening gap when inserted into the insertion opening. An electromagnetic relay characterized by: