JPH052964A - Relay - Google Patents

Abstract

PURPOSE:To construct a relay in a small size and with a high withstand voltage. CONSTITUTION:A coil block 5 is formed by winding a coil 53 on a core 51 in the condition insulated. A plurality of contact terminals 41 and coil terminals 42 are formed consolidated as a terminal block 4. The coil block 5 is coupled with the terminal block 4, and a body block 1 is formed through molding from plastics while the mag. pole part of the coil block 5 is excluded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating structure of a relay which is compact and which is required to have a high breakdown voltage.

[0002]

2. Description of the Related Art As a relay of this type, for example, a coil block in which a coil is wound around a substantially U-shaped iron core, a permanent magnet interposed between both sides of the iron core, and this permanent magnet are used. 2. Description of the Related Art There is a so-called balanced armature type, which has an armature that is swingably arranged above and has opposite ends respectively facing both side pieces of an iron core and that opens and closes contacts by swinging the armature.

[0003]

By the way, in the conventional relay of this type, in general, individual components are assembled and manufactured in a manufacturing process. In the conventional relay in which such an assembly is performed, in order to secure the insulation distance between the coil and the contact, the outer dimension of the relay is increased to secure the insulation distance, or the insulating plate is used as the coil and the contact. It has been commonly practiced to insert between them to increase the substantial insulation distance. However, it is difficult to satisfy both requirements, which is contrary to ensuring insulation and high withstand voltage, and miniaturization, which is an essential condition of the type of relay mounted together with other electronic components.

The present invention has been made in view of the above points, and an object of the present invention is to provide a small relay having a high breakdown voltage.

[0005]

In the present invention, in order to achieve the above object, a coil is integrally connected to a terminal, and the coil and the terminal are molded with a synthetic resin to form a body block. In order to achieve the same purpose, a coil block constructed by winding a coil around an iron core in an insulated state is connected to a terminal block integrally formed with a terminal, and a synthetic resin is used except for the magnetic pole portion of the coil block. The body block may be formed by molding.

Further, in order to secure an insulation distance between the coil terminal and the contact terminal, a plurality of coil terminals connected to the ends of the coil and a plurality of contact terminals for producing an output according to the contact switching state are provided. It is preferable that they are arranged along both sides of the body block in the width direction.

[0007]

The present invention has the above-mentioned configuration,
By molding the coil with synthetic resin, the insulation distance from the contact portion is secured, and even if it is made small, it has a high withstand voltage.

[0008]

1 to 5 show an embodiment of the present invention. As shown in FIG. 2, the relay of this embodiment includes a body block 1, an armature block 2 housed in the body block 1, and a cover 3 fitted on the body block 1. The body block 1 includes a terminal block 4, a coil block 5 and a permanent magnet 6 shown in FIGS.
Are integrally formed by molding with a synthetic resin.

As shown in FIG. 1D, the coil block 5 is formed by molding a coil bobbin 52 made of synthetic resin from the central piece of the substantially U-shaped iron core 51 to the bases of both side pieces. As shown in b), the coil 53 is wound and formed. The coil bobbin 52 is formed with a winding portion around which the coil 53 is wound on both left and right sides, and the coil 53 is wound around each winding portion in reverse winding. And
The coil bobbin 52 is provided with a connecting pin 54 for connecting the ends of the coil 53 and a fixing piece 55 integrally connected to the connecting pins 54 at the left and right ends.

The terminal block 4 has an upper side 3 in FIG.
By punching a thin plate material (hoop material) 44, a plurality of contact terminals 41 and three coil terminals 42 on the lower side are simultaneously formed in the lateral direction in FIG. g)
The terminals 41 and 42 are bent and separated in the molded state of the synthetic resin shown in FIG. A fixed contact 43 is provided at the base end of the contact terminals 41 on both sides molded in synthetic resin.
Are fixed together.

By the way, in this type of relay, as shown in FIG.
As shown in (a), the terminals 41 and 42 are bent vertically downward and inserted into the insertion holes formed in the printed circuit board to be mounted, and as shown in (b), the terminals are bent vertically downward. Bend the tip further laterally outward,
There is a surface mount type that is soldered to a copper foil formed on the surface of the printed circuit board, and the terminals 41 and 42 are appropriately bent according to the type.

The coil block 5 is placed on the terminal block 4 as shown in FIG.
The fixing pieces 55 protruding from both ends of the coil terminal 42 are welded to the bases of the coil terminals 42 on the left and right sides, which are molded in the synthetic resin, and the central connecting pin 54 is connected to the central coil terminal 4.
It is integrated with the terminal block 4 by welding and connecting to a substantially square-shaped portion which is a base end portion of 2.

The permanent magnet 4 is in the form of a flat plate, both ends of which are opposed to the magnetic pole are magnetized to have the same pole, and the middle portion is magnetized to have a different pole. As shown in FIG. 5
It is attached by welding between both side pieces of No. 1. The manufacturing process of the body block 1 described above will be briefly described. The terminal block 4, the coil block 5, and the permanent magnet 6 are separately manufactured in separate steps. Here, the terminal block 4 is formed by punching the thin plate material 44 as described above. In the coil block 52, first, a coil bobbin 52 is molded on an iron core 51 as shown in FIG. 1 (d), and a coil 53 is wound as shown in FIG. 1 (b) to form a block.

Next, the coil block 5 and the permanent magnet 6 are integrated. This integrated block is integrated with the terminal block 4 as shown in FIG. And FIG.
Mold with a synthetic resin as shown in FIG. here,
In the case of molding with synthetic resin, the synthetic resin injection port (gate port) is provided between the coil block 5 and the permanent magnet 6 on the lower surface side. The mark 19 of the injection port left after molding is shown in FIG.
(C) and FIG.4 (c) are shown. The reason for doing this is
This is to prevent the injection pressure of the synthetic resin at the time of molding from being directly applied to the coil 53, which can prevent disconnection of the coil 53. Therefore, in order to prevent the disconnection of the coil 53, it is not necessary to take a protective measure such as taping the coil 53 as in the conventional case, and the factor that increases the manufacturing cost can be eliminated.

After that, the terminals 41 and 42 are bent and cut to manufacture the body block 1 shown in FIG.
The above manufacturing is performed in an automatic assembly process. The body block 1 is molded of synthetic resin except for the permanent magnets 6, both side pieces of the armature block 2 of the iron core 51 in contact, the tip portions of the terminals 41 and 42, and the fixed contact 43.
A housing recess 11 for housing the armature block 2 is formed in a portion corresponding to the permanent magnet 6.

When manufactured in this manner, the coil block 5
Since is completely molded (molded and sealed) with a synthetic resin, it is possible to secure an insulation distance from a contact described later, and it is possible to obtain a high withstand voltage even in the case of forming a microminiature. Moreover, the position of the contact point and the position of the coil block 5 are determined by the mold, the positional accuracy is improved, and the variation in characteristics can be reduced. Therefore, in FIG.
It is particularly suitable when thermal stability is required as in the type shown in (b).

Further, when the terminal block 4 has the structure shown in FIG. 1A, the coil terminal 42 and the contact terminal 41 are arranged along both sides of the body block 1 in the width direction, and the coil terminal 42 and the contact terminal 41 are arranged. The distance from the coil terminal 42 and the contact terminal 41 can be secured at the greatest distance. Other configurations will be described below. The armature block 2 includes a plate-shaped magnetic armature 21 made of a magnetic material, a conductive contact spring 22 fixed to the armature 21, and a movable contact 23 fixed to the tip of the contact spring 22.

The armature 21 is provided with a swinging fulcrum 24 projecting from the center of both side surfaces, and the swinging fulcrum 24 is provided at the body block 1.
Fulcrum holding recess 12 formed on the inner surface of the housing recess 11
It is loosely fitted in and is housed in the storage recess 11 so as to be swingable. The contact spring 22 is made of a spring material and is fixed to the armature 21 at the center. This contact spring 2
2, spring pieces 25 are provided on both sides along the longitudinal direction of the armature 21. The ends of these spring pieces 25 are divided into two by a slit, and the central portion is bent into a substantially Z shape. The movable contact 23 is fixed to the tip of the spring piece 25. A T-shaped hinge spring 26 is projected from one end of the central portion of the contact spring 22, and the hinge spring 26 is connected to a contact terminal 41 as a central common terminal. Here, a recess 13 is formed at the center of the side wall of the housing recess 11 of the body block 1 in which the contact terminal 41 is planted, and the base of the contact terminal 41 at the center is exposed from the bottom surface of the recess 13. The hinge spring 26 is welded and connected to the exposed portion. The hinge spring 26 is twisted by the armature 2
It also has a function of giving a restoring force to 1.

The cover 3 has a box-like shape with an opened lower surface, and has a cylindrical portion 31 at one corner on the upper surface, which is in communication with the interior for secondary sealing. A pressing piece 33 shown in FIG. 4B is provided so as to project from the position of the rotation axis of the armature block 2 on the inner bottom surface of the cover 3, and this pressing piece 33 prevents rattling of the armature block 2 in the vertical direction. It has been prevented.
The cover 3 is fitted to the body block 1 to which the armature block 2 is attached, and the air inside is evacuated through the tubular portion 31 to seal the tubular portion 31 with an adhesive material, or the tubular portion 31
The second sealing is performed by heat welding. This completes the relay.

By the way, in the case of the above-mentioned secondary sealing structure, "insulation thickness of 0.4 mm or more" defined in safety standards such as IEC standard or BS standard is secured.
Can not be ensured. Therefore, the convex ribs 14 shown in FIG. 6 are provided so as to project from the body block 1, and the through holes 32 are formed in a portion of the cover 3 corresponding to the convex ribs 14, and the convex ribs 14 are melted by a light beam to form a protrusion (b) in FIG. If the welding is performed as shown in (), the above regulation can be reliably ensured. However, in order to comply with the above standard, the cover 3 shown in FIG.
The dimension a shown in (a) needs to be 0.4 mm or more. The edge of the insertion hole 32 on the light beam irradiation side is tapered so that the light beam can easily hit.

The operation of the relay of the above embodiment will be briefly described. In this relay, either coil 5
3 is selectively energized, one end of the armature 21 is attracted to one side piece of the iron core 51 according to the direction of magnetization of the iron core 51, and the armature block 2 swings, so that the armature 21 is attracted to the side piece of the iron core 51. At this time, the contact spring 2
The movable contact 23 fixed to one of the two spring pieces 15 contacts the fixed contact 43. When the power supply to the coil 53 is stopped in this state, the closed magnetic circuit is maintained as it is due to the magnetic force of the permanent magnet 6, and the state where the armature 21 is in contact with one of the iron cores 51 is maintained. When the other coil 53 is energized, the armature 21 is attracted to the other side piece of the iron core 51, and the movable contact 23 fixed to the other spring piece 25 becomes the fixed contact 4.
Touch 3. Even in this state, after stopping the energization, the current state is maintained and so-called bistable operation is performed.

[0022]

As described above, according to the present invention, the coil is integrally connected to the terminal, and the coil and the terminal are molded with the synthetic resin to form the body block. The coil is molded with the synthetic resin. , The insulation distance from the contact part is secured, and even with a small size, high breakdown voltage is achieved.

A coil block, which is formed by winding a coil around an iron core in an insulated state, is connected to a terminal block integrally formed with terminals, and a body block is formed by molding with a synthetic resin except for a magnetic pole portion of the coil block. Even if configured, by similarly molding the coil with synthetic resin, the insulation distance from the contact portion is secured, and even if it is made small, it has a high withstand voltage. Further, when a plurality of coil terminals connected to the ends of the coil and a plurality of contact terminals that generate an output according to the contact switching state are arranged along both sides in the width direction of the body block, The distance between the contact terminal and the contact terminal can be maximized, and thus the insulation distance between the coil terminal and the contact terminal can be secured.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a manufacturing process of a body block according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the above relay.

FIG. 3A is a plan sectional view of a relay. (B) is a side view same as the above. (C) is a bottom view of the above.

4A is a cross-sectional view taken along the line AB in FIG. FIG. 3B is a sectional view taken along the line C-D in FIG. FIG. 3C is a sectional view taken along line EF in FIG. 3D is a sectional view taken along the line GH in FIG.

5A and 5B are perspective views showing a completed state of relays of different types.

6A and 6B are explanatory views of another secondary sealing structure in the above.

[Explanation of symbols]

1 body block 4-terminal block 2 coil block 41 contact terminals 42 coil terminal 51 iron core 53 coils

Claims (3)

[Claims] 1. A relay comprising a body block formed by integrally connecting a coil to a terminal and molding the coil and the terminal with a synthetic resin. 2. A body block is formed by connecting a coil block, which is formed by winding a coil in an insulated state around an iron core, to a terminal block integrally formed with a terminal, and molding a synthetic resin excluding the magnetic pole portion of the coil block. A relay characterized by being configured. 3. A plurality of coil terminals connected to the ends of the coil and a plurality of contact terminals for producing an output according to a contact switching state are arranged along both sides of the body block in the width direction. The relay according to claim 1 or 2, wherein the relay is formed.