JPH0727544Y2 - Polarized relay - Google Patents

Description

TECHNICAL FIELD The present invention relates to a seesaw amateur type polarized relay.

[Background Art] In a polarized relay of this type, a support piece, which is a hinge spring that supports a movable contact spring piece that opens and closes a contact, is fixed by welding or the like to a terminal plate that is planted on a side wall of a base and has its upper surface exposed. It is supposed to be done. That is, the manufacturing process of welding the support pieces is performed after adjusting the overtravel of the contacts and keeping the operating voltage within the standard. In particular, since the conventional supporting piece protruding from the armature block extends straight, and the supporting pieces protruding from both sides of the spring supporting body are fixed to the terminal plate of the base,
Tension occurs in the support piece due to the state of welding the support piece,
Therefore, there is a problem that an increase in frictional force leads to a change in characteristics.

[Object of the Invention] The present invention is provided in view of the above-mentioned point, and an object thereof is to prevent an adverse effect on characteristics due to distortion at the time of welding of a support piece that supports a movable contact spring piece. It provides a pole relay.

DISCLOSURE OF THE INVENTION (Structure) The present invention relates to an iron core around which a coil is wound, a permanent magnet interposed between magnetic poles of the iron core, and a fulcrum of a substantially central portion of an upper surface of the permanent magnet located above the coil. Armature pivotally supported by the armature, a movable contact spring piece provided integrally with the armature for opening and closing the contact, and an armature provided integrally with the armature and electrically connected to the movable contact spring piece The supporting piece projecting outward from the side of the armature, and the terminal plate embedded in the side wall of the base for accommodating the above-mentioned members. In a polarized relay in which the armature is swingably supported by welding to a common terminal plate exposed inside the side wall, absorption that absorbs the force during welding with the terminal plate between the tip and base of the support piece. By providing the part, the force generated when welding the support piece to the terminal plate is absorbed by the absorption part. Ri and absorption, characterized in that so as to prevent characteristic change due to welding.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. Third
The figure shows an exploded perspective view of a polarized relay. As shown in FIG. 3, the casing 1 has a box-shaped base 11 opened upward,
The cover 12 has a box-like shape opened downward and is fitted over the base 11 from above the side wall of the base 11.

The base 11 is a molded product made of an insulating material such as a synthetic resin formed in a substantially rectangular parallelepiped shape, and has a recess in which the upper side and the inner side surface are opened at the center in the longitudinal direction on both side walls in the width direction.
13 are formed respectively. The common terminal 21 faces the bottom surface of each recess 13, and the common terminal 21 is formed of a conductive plate integrally with a common terminal piece 22 that is exposed to the outside of the side wall of the base 11 in the width direction and projects downward. . Ribs 14 are formed at the four inner corners of the base 11 so as to run vertically and whose upper ends are located below the upper surface of the base 11. A fixed contact plate 24 having a fixed contact 23 on the upper surface of the rib 14 overlaps with the upper surface of the rib 14, and the fixed contact plate 24 is exposed to the outer side wall of the base 11 in the width direction and a fixed terminal piece 25 protruding downward. It is integrally formed of a conductive plate. On both side walls in the longitudinal direction of the base 11 are formed notches 15 which are open in the upper and lower sides of the side wall at the center in the width direction, and a pair of coil terminal coupling pieces is formed from the bottom of each notch 15. 26 is projected upward. The coil terminal coupling piece 26 is formed of a conductive plate integrally with the coil terminal piece 27 that is exposed to the outside of both side walls of the base 11 in the width direction and projects downward. In this way, the common terminal
21 and the common terminal piece 22, the fixed contact plate 24 and the fixed terminal piece 25, the coil terminal coupling piece 26 and the coil terminal piece 27 are integrally formed of a conductive plate, respectively, and the base 11 and each conductive plate are formed by insert molding. It is integrated. Conductive plate is base 11
The conductive plate is routed within the side wall of the base 11 and is installed over substantially the entire length of the side wall of the base 11. Therefore,
The side wall of the base 11 is reinforced by the conductive plate, and the strength of the base 11 is increased because the base 11 is box-shaped.

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

A coil block 3, a permanent magnet 4, and an armature block 5 are arranged in a casing 1 formed by a base 11 and a cover 12.

The coil block 3 includes an iron core 31, a coil bobbin 35 in which the iron core 31 is installed, a coil 32 wound around the outer circumference of the coil bobbin 35, and the like. A coil 32, which is a horizontal piece of the substantially U-shaped iron core 31 opened upward, is wound, and both ends of the iron core 31 are collars made of an insulating material.
It is covered with 33 and the tip of the leg is exposed from one place on the circumference of the tsuba 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 project above the upper end of the collar 33 and to come into contact with the coil terminal coupling piece 26. With the coil block 3 housed in the base 11, the coil terminal 34 and the coil terminal coupling piece 26
And are electrically and mechanically coupled by a method such as welding or soldering. The permanent magnet 4 is interposed between the exposed portions of the leg pieces of the iron core 31 in such a manner that the magnetic poles abut.

The permanent magnet 4 located above the coil 32 has a plate shape,
A concave groove 41 running in the width direction of the base 11 and having a substantially semicircular cross section is formed in the center of the upper surface. The upper surface of the permanent magnet 4 is an inclined surface that is thickest in the central portion in the longitudinal direction of the base 11 and gradually decreases toward the ends.
It is 42. The fulcrum portion 54 of the armature block 5 is swingably supported in the groove 41 formed in the upper surface of the permanent magnet 4. Further, both ends of the permanent magnet 4 in the longitudinal direction of the base 11 are magnetized to the same pole, and the central portion is magnetized to a different magnetic pole. That is, if both ends are N poles, the central portion is magnetized to be S poles. Then, the magnetic poles at both ends thereof are interposed between the leg pieces of the iron core 31 of the coil block 3 so as to be in contact with the inner side surfaces of the leg pieces.

The armature block 5 includes a magnetic armature 51 formed in a substantially rectangular flat plate shape, and a movable contact spring piece 52 disposed on substantially the same plane as the armature 51 on both sides of the armature 51 in the width direction. , And a spring support 53 which is a molded product of an insulating material such as a synthetic resin integrally molded with the armature 51 and the movable contact spring piece 52. As shown in FIG. 4, on the lower surface of the armature 51, there is formed a fulcrum portion 54 having a substantially semicircular cross section which is formed as a ridge in the width direction of the armature 51. The movable contact spring piece 52 is an elongated conductive leaf spring, and a support piece 55, which is a hinge spring whose tip portion is formed in a substantially T shape in the width direction, is integrally projectingly provided at the central portion in the longitudinal direction. ing. In addition, slits 56 are formed at both ends in the longitudinal direction so that the slits 56 open at the ends, so that the ends of the movable contact spring pieces 52 are easily bent. The spring support 53 is formed with notches 57 that open at both edges of the armature 51 in the width direction. A support piece 55 is provided so as to project from the deep end of the notch 57, and the tip end portion of the support piece 55 projects outward from the spring support body 53 in the width direction of the armature 51. That is, since the movable contact spring piece 52 is fixed by the spring support body 53 at the central portion in the longitudinal direction, and the support piece 55 is provided so as to project from the spring support body 53, the movable contact spring piece 52 in the longitudinal direction. Both end portions and the support piece 55 independently apply the spring force. In this armature block 5, the fulcrum portion 54 provided on the lower surface of the armature 51 is housed in the concave groove 41 of the magnet block 4, and the supporting piece 55 is fitted into the concave portion 13 provided in the side wall of the base 11 to support the same. The tip portion of the piece 55 is welded to the common terminal 21 and fixed to each other to be arranged at a fixed position in the base 11. The armature block 5 swings around the support piece 55 as an axis. It is free.

Here, as shown in FIG. 1, between the front end and the base in the longitudinal direction of the support piece 55, there is formed an absorbing portion 58 which is bent in a substantially semicircular shape so as to project upward. This is the support piece 55
The purpose of this is to absorb the pulling force generated when the tip of the and the common terminal 21 implanted on the side wall of the base 11 are welded. That is, if FIG. 2 (a) shows the shape of the absorbing portion 58 of the support piece 55 before welding, even if the pulling force F received in the tip direction as shown in FIG. 2 (b) is generated during welding, Even if a pulling force F is generated on the base side as shown in FIG. 2 (c),
The absorbing portion 58 absorbs the pulling force F in either direction. Therefore, the common terminal of the support piece 55
It is possible to prevent the change in characteristics of the movable contact spring piece 52 by absorbing the tension force generated during welding to the 21.

As described above, the cover 12 is fitted on the base 11 with the coil block 3, the magnet block 4, and the armature block 5 housed in the base 11. The four partition pieces 16 projectingly provided on the inner peripheral surface of the cover 12 are inserted into the gaps between the armature 51 and the movable contact spring piece 52 while the cover 12 is fitted on the base 11, and contact each other. Since the insulating partition 16 is interposed between the pole 51 and the movable contact spring piece 52, a large insulation distance can be secured between them.

With the above configuration, when the coil 32 is energized, one end of the armature 51 in the longitudinal direction is attracted by one leg piece of the iron core 31 according to the direction of magnetization, and the armature block 5 swings to move the iron core 31. →
A closed magnetic circuit of the armature 51 → the permanent magnet 4 → the iron core 31 is formed, and one end of the movable contact spring piece 52 in the longitudinal direction contacts the corresponding fixed contact 23. When power supply to the coil 32 is stopped in this state, the closed magnetic circuit is maintained as it is due to the magnetic force of the permanent magnet 4, and the state where the armature 51 is in contact with one of the iron cores 31 is maintained. Further, if the energization direction to the coil 32 is reversed, the armature 51 is attracted to the other leg piece of the iron core 31, and the other end portion of the movable contact spring piece 52 in the longitudinal direction becomes the corresponding fixed contact 23. Contact. Even in this state, the current state is maintained after the power supply is stopped, and so-called bistable operation can be performed.

[Advantages of the Invention] As described above, the present invention includes an iron core around which a coil is wound, a permanent magnet interposed between magnetic poles of the iron core, and a substantially central portion of the upper surface of the permanent magnet located above the coil. An armature pivotally supported by a fulcrum portion, a movable contact spring piece integrally provided with the armature for opening and closing a contact, and an armature provided integrally with the armature and electrically connected to the movable contact spring piece. The support piece is connected and protrudes outward from the side of the armature, and the terminal plate is embedded in the side wall of the base for accommodating the above-mentioned members. In the polarized relay in which the armature is swingably supported by welding to the common terminal plate exposed inside the side wall of the, the force at the time of welding with the terminal plate is absorbed between the tip and the base of the support piece. Since it has an absorption part, it absorbs the force generated when welding the support piece to the terminal board. The effect of being absorbed by the collecting portion and preventing the characteristic change due to welding can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of an armature block according to an embodiment of the present invention, FIGS. 2 (a) to 2 (c) are diagrams for explaining the operation of the same, and FIG. 3 is an exploded perspective view of the entire polarized relay of the same. FIG. 4 is a perspective view of the lower surface side of the above armature block. 4 is a permanent magnet, 11 is a base, 21 is a common terminal, 31 is an iron core,
32 is a coil, 51 is an armature, 52 is a movable contact spring piece, and 58 is an absorber.

Claims (1)

[Scope of utility model registration request] 1. An iron core around which a coil is wound, a permanent magnet interposed between magnetic poles of the iron core, and a fulcrum at a substantially central portion of an upper surface of the permanent magnet located above the coil so as to be swingable. The armature to be supported, a movable contact spring piece provided integrally with the armature for opening and closing the contact, and a side portion of the armature provided integrally with the armature and electrically connected to the movable contact spring piece. It has a supporting piece protruding further outward and a terminal plate implanted in the side wall of the base for accommodating the above-mentioned members, and the projecting tip of the supporting piece is exposed inside the side wall of the base. In a polarized relay in which the armature is swingably supported by being welded to the terminal plate of, the absorbing part that absorbs the force during welding with the terminal plate is provided between the protruding tip of the supporting piece and the base part. Polarized relay characterized by.