JPH0731971B2 - Electric equipment base - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a base of an electric device provided with a terminal.

[Background Art] Generally, in a base of an electric device in which an electric device body having a mechanical operation part such as a relay is built in, if the strength is low, the characteristics of the mechanical operation part change, and there is a problem that reliability is reduced.

[Object of the Invention] The present invention has been made in view of the above points, and its main purpose is to enhance the strength of a base formed by a molded product and to improve the operation reliability of a component installed inside. The purpose of the present invention is to provide a base of an electric device in which the property is not deteriorated and the number of parts is not increased by using the terminal piece as the reinforcing member of the base.

DISCLOSURE OF THE INVENTION (Examples) Examples of the present invention will be described below with reference to the drawings. In the following description, a polarized relay using the base of the present invention will be exemplified. As shown in FIG. 1, the casing 1 is composed of a box-shaped base 11 and a box-shaped cover 12 fitted to cover the base 11.

The base 11 is a molded product of an insulating material such as synthetic resin, and a recess 13 is formed in each of the side walls at the longitudinal center thereof. A contact piece 21 is provided in each of the recesses 13, and the contact piece 21 is integrally formed of a conductive material 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. The rib 14 is provided with a fixed contact plate 24 having a fixed contact 23, and the fixed contact number 24 is made of a conductive material integrally with a fixed terminal piece 25 that is exposed outside the widthwise side wall of the base 11 and projects downward. Has been formed. Notches 15 are formed on both side walls of the base 11 in the longitudinal direction, and a pair of coil terminal coupling pieces 26 are provided so as to project from the bottom surface of each notch 15. The coil terminal coupling piece 26 is formed of a conductive material integrally with the coil terminal piece 27 that is exposed outside both side walls of the base 11 in the width direction and projects downward. Thus, the contact piece 21 and the common terminal piece 22, the fixed contact plate 24 and the fixed terminal piece 25, and the coil terminal coupling piece 26 and the coil terminal piece 27 are integrally formed of a conductive material respectively, and the base 11 and each conductive piece. The material is integrated by insert molding. The conductive material is extended in the direction connecting the roots of the adjacent bases 11 in the peripheral wall of the base 11,
The conductive material is arranged over substantially the entire length of the peripheral wall of the base 11. Therefore, the side wall of the base 11 is reinforced by the conductive material, and the strength of the base 11 is increased due to the box shape of the base 11.

The cover 12 is a molded product of an insulating material such as synthetic resin, and has four partitions 16 protruding from the inner bottom surface. 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.

As shown in FIG. 3, in the coil block 3, a coil 32 is wound around an approximately U-shaped iron core 31 opened upward, and both magnetic poles of the iron core 31 are formed of an insulating material. The tip of both magnetic poles is formed so as to be covered with the brim 33 and to be exposed from the peripheral surface of the brim 33. A pair of coil terminals 34 connected to the coil 32 are provided corresponding to the respective collars 33, and are bent so as to project above the collars 33 and come into contact with the coil terminal coupling pieces 26. With the coil block 3 housed in the base 11, the coil terminal 34 and the coil terminal coupling piece 26 are electrically and mechanically coupled by welding or soldering. Where the coil terminals
The coil terminal coupling piece 26 and the coil terminal coupling piece 26 project upward from both magnetic poles of the iron core 31, respectively, and the coil terminal coupling piece 26 is projected in the cutout portion 15.
And the coil terminal 34 are exposed from the base 11,
The work of welding or soldering the two becomes easy. The permanent magnet 4 is interposed between the magnetic poles of the iron core 31 so that the magnetic poles abut.

The permanent magnet 4 has a plate-like shape, and a concave 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 surface. The surface of the permanent magnet 4 is an inclined surface 42 that is inclined so that the intermediate portion in the longitudinal direction of the base 11 has the largest thickness and the thickness gradually decreases toward the ends. Further, both ends of the permanent magnet 4 in the longitudinal direction of the base 11 are magnetized to the same pole, and the middle part is magnetized to a different magnetic pole. That is, if both ends are N poles, the middle portion is magnetized so as to be S poles. However, the magnetized position of the intermediate portion may be shifted to one end side, and in that case, monostable operation can be performed. Permanent magnet 4
The magnetic poles at both ends of the coil block 3 are interposed between the two leg pieces so as to be in contact with the inner surface of each magnetic pole of the iron core 31 of the coil block 3.
Here, a required gap may be interposed between the magnetic poles of the iron core 31 and the magnetic poles at both ends of the permanent magnet 4, or a difference may be given to both gaps in order to obtain the required magnetic characteristics.

The armature block 5 is made of a magnetic material and has an armature 51 formed in a flat plate shape, and movable contact spring pieces 52 arranged on both sides of the armature 51.
And a spring support 53, which is a molded product of an insulating material such as synthetic resin integrally molded with the armature 51 and the movable contact spring piece 52. As shown in FIG. 4, on the back surface of the armature 51, there is formed a ridge 54 having a substantially semicircular cross section and running in the width direction of the armature 51. The movable contact spring piece 52 is a conductive leaf spring, and a support piece 55 having a substantially T-shaped tip is integrally provided at the center in the longitudinal direction in the width direction. In addition, slits 56 are formed at both ends in the longitudinal direction, each of which has a tip opening, and the movable contact spring piece 52
The tip of the is 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, 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 still projected from the spring support body 53. Both end portions and the support piece 55 independently apply the spring force. This armature block 5 is armature
The ridge 54 provided on the back surface of the 51 is housed in the concave groove 41 of the permanent magnet 4, and the supporting piece 55 is fitted in the concave portion 13 provided on the side wall of the base 11 so as to be arranged at a fixed position in the base 11. The armature block 5 can swing about the support piece 55 as an axis. As described above, 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 as a conductive portion and a support portion. This leads to the reduction of component parts. Further, since the flat plate-shaped support piece 55 is used as the swing center of the armature block 5, the armature block 5 can swing freely by utilizing the twist of the support piece 55.
There is no or almost no frictional portion between the armature block 5 and other members, and the starting force for overcoming the static friction force at the time of initial movement of the armature block 5 is small, resulting in high sensitivity. It is possible to obtain a polarized electromagnet. On the other hand, since the spring force due to the twist of the support piece 55 acts on the armature block 5, the attraction force acting on the armature 51 can be adjusted by the spring force due to the twist of the armature 51, as shown in FIG. Further, the contact force 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 contact pressure can be adjusted by adjusting the shape and size of both ends of the movable contact spring piece 52 in the longitudinal direction, and the suction force can be adjusted by adjusting the shape and size of the support piece 55. The suction force and the suction force can be adjusted independently of each other. Furthermore, since the movable contact spring piece 52 is such that both ends in the longitudinal direction exert independent spring forces, contact points for both fixed contacts 23 can be adjusted by adjusting the shape and size of both ends of the movable contact spring piece 52. It is possible to adjust the pressure independently, which facilitates the adjustment of the contact pressure. Also,
The movable contact spring pieces 52 are attached to the armature 51 on both sides in the width direction of the armature 51.
Since it is arranged on substantially the same plane, the overall thickness in the vertical direction can be reduced. Although the movable contact spring pieces 52 are provided on both sides of the armature 51, they may be provided on only one of them.

As described above, the cover 12 is fitted on the base 11 with the coil block 3, the permanent magnet 4, and the armature block 5 housed in the base 11. As shown in FIG. 2, the four partitions 16 projecting from the inner bottom surface of the cover 12 are provided between the armature 51 and the movable contact spring piece 52, respectively, with the cover 12 fitted on the base 11. The insulating partition 16 is inserted between the armature 51 and the movable contact spring piece 52 so that a large insulation distance can be secured between them.

Although the concave groove 41 of the permanent magnet 4 has a substantially semicircular cross section in the above-described example, the cross sectional shape may be a substantially V shape that is open upward. In this case, the ridge 54 formed on the armature 51 may have a thin blade shape. Further, in addition to the above-mentioned shape, any shape may be used as long as one of the permanent magnet 4 and the armature 51 is housed in the other so as to be fitted so that the armature 51 is swingably guided. Further, the permanent magnet 4 and the armature 51 may be fitted in a state where they are always in contact with each other, or may be fitted only when an external vibration or impact is applied.

With the above configuration, when the coil 32 is energized, one end of the armature 51 in the longitudinal direction is attracted by one magnetic pole of the iron core 31 in accordance with 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 the energization of 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, by reversing the energization direction to the coil 32, the armature 51 is attracted to the other magnetic pole of the iron core 31, and the other end 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.

[Effect of the Invention] As described above, the present invention has a box-shaped base made of a molded product of a synthetic resin material and having one open surface. In the base in which the external terminals, which are the other ends of the plurality of terminal pieces formed integrally with the base at the same time, project from the peripheral wall of the base, the portions embedded in the base of each terminal piece are inside the peripheral wall of the base. Since it extends in the direction connecting the adjacent ridges and is embedded over the entire length of the peripheral wall, the peripheral wall of the base is reinforced by the terminal pieces, and a molded product that forms the base like a small relay. It has an advantage that sufficient strength can be obtained even when the wall thickness is small. Further, since the terminal piece is used as a member for reinforcing the base, there is an advantage that the number of parts is not increased and the appearance is not changed by increasing the strength of the base.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing 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, and FIG. 4 is used for the same. FIG. 5 is a perspective view of the lower surface side showing the armature block, and FIG. Reference numeral 11 is a base, 22 is a common terminal piece, 24 is a fixed terminal plate, 25 is a fixed terminal piece, 26 is a coil terminal coupling piece, and 27 is a coil terminal piece.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 55-6763 (JP, A) JP 55-69914 (JP, A) JP 52-48044 (JP, A) JP 57- 14531 (JP, B2)

Claims (1)

[Claims] Claim: What is claimed is: 1. A box-shaped base made of a synthetic resin material having an open surface, one end of which is electrically connected to an electric equipment body in the base, and an intermediate portion of which is formed integrally with the base at the same time. In the base in which the external terminals, which are the other ends of the plurality of terminal pieces that are projected, project from the peripheral wall of the base, the portion of each terminal piece embedded in the base connects the adjacent ridges in the peripheral wall of the base. A base for an electric device, which is extended and is embedded over substantially the entire length of a peripheral wall.