JPH0449804Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to the structure of a polarized relay.

[Background technology] In order to satisfy the design specifications of the relay, it is necessary to accurately incorporate the electromagnetic block into the base that has each terminal piece of the relay, and to ensure the positional relationship between the fixed contacts of the base and the movable contacts of the electromagnetic block. It is a condition. If the positional relationship is unstable, problems such as a decrease in lifespan and contact reliability due to positional deviation of the contacts occur.

[Purpose of the invention] The present invention has been proposed in view of the above-mentioned points, and provides a relay structure for the purpose of accurately assembling an electromagnetic block into a base.

[Disclosure of the invention] (Structure) The present invention consists of a coil block in which a coil is wound around an iron core, a permanent magnet interposed between the magnetic poles of the iron core on the upper surface of the coil block, and a permanent magnet with each end having an iron core. Movable contact spring pieces are provided that protrude toward the ends from the center portions of both sides of the armature corresponding to both magnetic poles, and the armature block is pivotably supported at the center portion of the upper surface of the permanent magnet to form an electromagnet block. forming a base, storing the electromagnetic block in a storage recess, and forming a base integrally molded with each terminal piece;
Pillars for positioning the electromagnetic block are integrally molded with the base at the four corners of the storage recess of the base, and a fixed contact plate facing the movable contact spring piece is mounted on the top surface of the pillar with the same area as the top surface of the pillar. It is characterized by being provided by integral molding with.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. As shown in FIG. 1, the casing 1 has a box-shaped base 11 that is open upward, and a box-shaped base 11 that is open downward, and is fitted from above the base 11 to cover the outside of the side wall of the base 11. It is composed of a cover 12.

The base 11 is a molded product made of an insulating material such as a synthetic resin and is formed into a substantially rectangular parallelepiped shape.The top surface is open in the center, and a storage recess 17 is formed in which an electromagnetic block (described later) is stored, and both sides of the base 11 in the width direction are opened. A recess 13 whose upper and inner surfaces are open is formed in the longitudinal center of the wall. A contact piece 21 faces the bottom of each recess 13, and the contact piece 21 is integrally formed of a conductive plate with a common terminal piece 22 that is exposed outside the widthwise side wall of the base 11 and projects downward. . Pillars 14 which run vertically and whose upper ends are located below the upper surface of the base 11 are formed at the four inner corners of the base 11, respectively. Pillar 1
A fixed contact 23 is provided on the upper surface of the column 14.
A fixed contact plate 24 having the same area as the upper surface is provided, and the fixed contact plate 24 has a fixed terminal piece 25 that is exposed on the outside of the side wall in the width direction of the base 11 and protrudes downward.
It is formed integrally with a conductive plate. Here, the dimensions between the pillars 14 provided at each of the four corners are strictly controlled. That is, as shown in FIG. 2, the inner dimension a between the pillars 14 in the width direction of the base 11 and the
The inner dimension b between the pillars 14 in the longitudinal direction of the base 11 is strictly controlled, and the electromagnetic block is positioned by these four pillars 14.
An electromagnetic block is inserted and fixed within the area surrounded by two pillars 14.

A notch 15 is formed in each side wall of the base 11 at the center in the width direction, and is open upwardly and on the front and back sides of the side wall, and a pair of coil terminal coupling pieces 26 are formed upwardly from the bottom surface of each notch 15. It is built protruding towards the front. Coil terminal coupling piece 26
is formed of a conductive plate integrally with a coil terminal piece 27 that is exposed on the outside of both side walls in the width direction of the base 11 and protrudes downward. In this way, the contact piece 21 and the common terminal piece 22, the fixed contact plate 24 and the fixed terminal piece 2
5, the coil terminal coupling piece 26, and the coil terminal piece 27 are each formed integrally with a conductive plate, and the base 11 and each conductive plate are integrated by insert molding. The conductive plate is routed within the side wall of the base 11, so that the conductive plate is installed within the side wall of the base 11 over substantially the entire length thereof. Therefore, the side walls of the base 11 are reinforced by the conductive plates, and together with the box shape of the base 11, the strength is increased.

Like the base 11, the cover 12 is a substantially rectangular parallelepiped molded product made of an insulating material such as synthetic resin, and has four partition pieces 16 projecting downward from the inner peripheral surface of the upper wall. ing. The partition piece 16 is formed along the longitudinal direction of the cover 12.

An electromagnetic block composed of a coil block 3, a permanent magnet 4, and an armature block 5 is disposed within a casing 1 formed by a base 11 and a cover 12.

As shown in FIG. 3, the coil block 3 has a substantially U-shaped iron core 31 that is open upward, and a coil 32 is wound around the horizontal pieces, and each leg piece of the iron core 31 is made of an insulating material. The legs are covered with a flange 33, and the tips of the legs are exposed from a part of the circumferential surface of the flange 33. A pair of coil terminals 34 connected to the coil 32 are provided corresponding to each collar 33, and are bent so as to protrude upward from the upper end of the collar 33 and come into contact with the coil terminal coupling piece 26. Coil block 3 is base 1
1, the coil terminal 34 and the coil terminal coupling piece 26 are electrically and mechanically coupled by welding, soldering, or the like.
The permanent magnet 4 is interposed between the exposed portions of the legs of the iron core 31 with its magnetic poles in contact with each other.

The permanent magnet 4 is plate-shaped, and a groove 41 having a substantially semicircular cross section and running in the width direction of the base 11 is formed in the center of the upper surface. The upper surface of the permanent magnet 4 is the base 11
It forms an inclined surface 42 which is thick at the center in the longitudinal direction and gradually becomes thinner toward the ends. Further, both ends of the permanent magnet 4 in the longitudinal direction of the base 11 are respectively magnetized with the same polarity, and the central part is polarized with different magnetic poles. That is, if both ends are north poles, the center part is magnetized to be south pole. The magnetic poles at both ends of the iron core 31 of the coil block 3 are interposed between the legs in such a manner that they are in contact with the inner surface of each leg.

The armature block 5 includes an armature 51 made of a magnetic material and formed into a substantially rectangular flat plate shape, and movable contact spring pieces 52 disposed substantially on the same plane as the armature 51 on both sides of the armature 51 in the width direction. , a spring support 53 which is a molded article of an insulating material such as synthetic resin, and is integrally molded with the armature 51 and the movable contact spring piece 52. As shown in FIG. 4, the lower surface of the armature 51 is formed with a protrusion 54 having a substantially semicircular cross section and running in the width direction of the armature 51.
The movable contact spring piece 52 is an elongated electrically conductive leaf spring, and integrally protrudes from the center portion in the longitudinal direction with a supporting piece 55 whose tip end is formed in a substantially T-shape in the width direction. In addition, slits 56 are formed at both ends in the longitudinal direction, each opening at the tip, so that the tip of the movable contact spring piece 52 can be easily bent. A notch 57 is formed in the spring support 53 and opens at both ends of the armature 51 in the width direction. A support piece 55 is provided to protrude from the inner end of the notch 57, and the tip of the support piece 55 protrudes outward from the spring support 53 in the width direction of the armature 51. That is, since the movable contact spring piece 52 is fixed at the center in the longitudinal direction by the spring support 53 and the support piece 55 is provided protruding from the spring support 53, the movable contact spring piece 52 Spring force is applied to each of the longitudinal ends and the support piece 55 independently. This armature block 5 has a protrusion 5 provided on the lower surface of the armature 51.
4 is placed in the groove 41 of the permanent magnet 4, and the supporting piece 55 is fitted into the recess 13 provided in the side wall of the base 11, thereby being disposed at a fixed position within the base 11. , the armature block 5 can swing freely around the support piece 55.

In this way, since the support piece 55 integrally formed with the movable contact spring piece 52 supports the armature block 5, the movable contact spring piece 52 serves both as a conductive part and a support part. This leads to a reduction in parts. In addition, a flat support piece 5
5 is used as the rotation axis of the armature block 5, as the armature block 5 swings, the supporting piece 55 is twisted, and a spring force against this twisting acts on the armature block 5. As shown in FIG. 5, the attractive force acting on the armature 51 can be adjusted by the spring force caused by the twisting of the armature 51.
Further, the contact pressure between the fixed contact 23 and the movable contact spring piece 52 can be adjusted by the spring force of the movable contact spring piece 52. As a result, the movable contact spring piece 5
The contact pressure can be adjusted by adjusting the shape and dimensions of both ends of the support piece 55 in the longitudinal direction, and the suction force can be adjusted by adjusting the shape and dimensions of the support piece 55. Therefore, the contact pressure and the suction force can be adjusted separately. They can be adjusted independently. Furthermore, since the movable contact spring piece 52 applies independent spring force to each end in the longitudinal direction, by adjusting the shape and dimensions of both ends of the movable contact spring piece 52, the contact point for both fixed contacts 23 can be adjusted. It is possible to adjust the pressure independently of each other, making it easy to adjust the contact pressure.

As described above, the storage recess 17 of the base 11
An electromagnetic block consisting of a coil block 3, a permanent magnet 4, and an armature block 5 is housed inside. The electromagnetic block has four pillars 14 as mentioned above.
Positioning is done by That is, each engagement part 33b has an L-shaped cross section and is composed of the outer surface of a protrusion 33a integrally formed on both sides of the outer surface of the collar 33 of the coil block 3, and the outer surface of the collar 33. By engaging the inner side of the pillar 14, the coil block 3, that is, the electromagnetic block is positioned with respect to the base 11. Therefore, the dimension a' between the outer surfaces of the protrusion 33a and the dimension b' between the outer surfaces of the collar 33 are regulated by the dimension between the pillars 14 of the base 11. The support pieces 55 of the armature block 5 are located in the recesses 13 of the base 11, and the tips of the movable contact spring pieces 52 are respectively opposed to the fixed contacts 23 of the fixed contact plate 24 on the upper surface of the column 14. .
Therefore, by strictly controlling the dimensions a and b between the fixed contact plate 24 integrally molded with the base 11 and the pillar 14 whose upper surface has the same size, and by inserting and fixing the electromagnetic block between the pillars 14, the fixed contact plate 24 is formed integrally with the base 11. The positional relationship between the plate 24 and the electromagnet block can be ensured with high precision, and the movable contact spring piece 52 located above the electromagnet block and the fixed contact plate 24 on the base 11 side, that is, the fixed contact 23
This makes it possible to ensure the positional relationship between the two with high accuracy. Further, a cover 12 is fitted onto the base 11 with the electromagnetic block housed therein. 4 protruding from the inner peripheral surface of the cover 12
As shown in FIG. 2, the partition pieces 16 are inserted between the armature 51 and the movable contact spring piece 52 with the cover 12 fitted on the base 11, and are inserted between the armature 51 and the movable contact spring piece 52. By interposing the insulating partition piece 16 between the movable contact spring piece 52 and the movable contact spring piece 52, a large insulation distance can be maintained between the two.

With the above configuration, if the coil 32 is energized,
Depending on the direction of magnetization, one end of the armature 51 in the longitudinal direction is attracted to one leg of the iron core 31, and the armature block 5 swings, causing the iron core 31 → armature 51 → permanent magnet 4 → iron A closed magnetic path of the core 31 is formed, and one longitudinal end of the movable contact spring piece 52 contacts the corresponding fixed contact 23. When the coil 32 is de-energized in this state, the magnetic force of the permanent magnet 4 maintains the closed magnetic path as it is, and the armature 5
1 is maintained in contact with one side of the iron core 31. Furthermore, if the current direction to the coil 32 is reversed, the armature 51 is attracted to the other leg of the iron core 31, and the other longitudinal end of the movable contact spring piece 52 connects to the corresponding fixed contact 23. come into contact with. Even in this state, the state is maintained after the current supply is stopped, and so-called bistable operation can be performed.

[Effects of the invention] As mentioned above, the present invention includes a coil block in which a coil is wound around an iron core, a permanent magnet interposed between the magnetic poles of the iron core on the upper surface of the coil block, and a permanent magnet with both ends made of iron. An electromagnet is constructed by providing movable contact spring pieces formed to protrude toward the ends from the central portions of both sides of the armature corresponding to both magnetic poles of the core, and with an armature block pivotably supported on the central portion of the upper surface of the permanent magnet. A block is formed, and the electromagnetic block is stored and arranged in the storage recess, and a base is integrally molded with each terminal piece, and pillars for positioning the electromagnet block are integrated with the base at the four corners of the storage recess of the base. mold,
On the top surface of this column, a fixed contact plate that faces the movable contact spring piece and has the same area as the top surface of the column is integrally molded with the base, so the dimensions between the columns for positioning the electromagnetic block must be strictly determined. By controlling this, it is possible to accurately position and fix the base with the fixed contact plate and the electromagnetic block with the movable contact spring piece. Therefore, the electromagnetic block can be accurately positioned with respect to the base. By doing so, the positional relationship between the movable contact spring piece on the electromagnetic block side and the fixed contact plate on the base side can be ensured with high precision, thereby preventing problems such as a decrease in electrical life and contact reliability due to contact misalignment. It has the advantage of being able to

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of an embodiment of the present invention, Fig. 2 is a partially omitted plan view of the same with the cover removed;
FIG. 3 is a sectional view of the same as above, FIG. 4 is a perspective view of the lower surface side of the armature block of same as above, and FIG. 5 is an explanatory view of the same as above. 3 is a coil block, 4 is a permanent magnet, 5 is an armature block, 11 is a base, 14 is a column, 17 is a storage recess, 24 is a fixed contact plate, 31 is an iron core, 32 is a coil, 51 is an armature, 52 indicates a movable contact spring piece.

Claims (1)

[Scope of utility model registration request] A coil block with a coil wrapped around an iron core,
A permanent magnet is interposed between the magnetic poles of the iron core on the top surface of the coil block, and a movable contact spring piece is formed to protrude toward the ends from the center on both sides of the armature, whose ends correspond to both magnetic poles of the iron core, respectively. and an armature block pivotably supported on the upper surface center of the permanent magnet to form an electromagnet block, and the electromagnet block is housed in a storage recess and is integrally molded with each terminal piece. Pillars that form a base and position the electromagnetic block at the four corners of the storage recess of the base are integrally molded with the base, and the upper surface of this column is opposed to the movable contact spring piece with the same area as the upper surface of the column. A relay structure consisting of a fixed contact plate integrally molded with a base.