JPS5936885Y2 - Yoke positioning structure - Google Patents

Description

[Detailed description of the invention] The present invention relates to a structure for determining the position of a yoke when installing the yoke to a coil frame, and more specifically to a structure for positioning the yoke in a type where the yoke has a support for the swinging fulcrum of the armature. It is.

In relays and the like, there is a type in which a hinge part is formed at one end of the yoke and an armature is rotatably supported by this hinge part.

In this case, if there are variations in the distance between the coil frame and the yoke, especially the distance between the coil frame and the hinge part of the yoke,
This results in variations in characteristics.

This is particularly noticeable when an insulator is interposed between the coil and the yoke to insulate them.

The present invention was developed in view of these points, and when the yoke is attached to the coil frame, the yoke is
In particular, it is an object of the present invention to provide a yoke positioning structure in which the hinge portion of the yoke can be accurately positioned and stable characteristics can be obtained.

The present invention will be described in detail below based on the embodiment of the illustrated relay. In the figure, 1 is a base, 2 is a cover, and on the base 1 there are a coil block 3, an armature 4, and a contact spring attached to a common contact terminal 5. 6. A pair of fixed contact terminals 7 are assembled.

As shown in FIG. 4, the coil block 4 includes a coil frame 9 around which a coil 8 is wound around the outer periphery of a hollow central body, and an iron core 1 inserted through the coil frame 9, which is a molded product of synthetic resin.
0. It is composed of a yoke 11 bent in an L shape,
One short piece of the yoke 11 is attached to one end of the coil frame 9 and connected to one end of the iron core 10, and the other piece of the yoke 11 is arranged along the coil frame 9.

The other end of the yoke 11 is a hinge part 12 that rotatably supports the vicinity of the bent part of the armature 4, and the end surface of the protrusion 13 protruding from the other end of the coil frame 9 is connected to the yoke 11. It is in contact with the vicinity of the hinge portion 12 of.

In the figure, 14 is an insulating wall that stands integrally from the base 1.
One of the pair of insulating walls 14 is for insulating between the yoke 11 and the fixed contact terminals 7, 7, and the other is for insulating between the yoke 11 and the coil 8, with both ends of the coil frame 9. It fits into grooves 15.15 provided on both ends.

The protrusion 13 protruding from the coil frame 9 described above maintains the distance l between the center of the coil frame 9 and the hinge portion 12 of the yoke 11 constant regardless of the presence of such an insulating wall 14. This not only allows stable operation of the armature 4 but also facilitates insertion of the insulating wall 14 between the coil 8 and the yoke 11.

In the figure, 16 indicates a coil terminal, and 17 indicates a sealant.

In this way, in the present invention, the protrusion protruding from the coil frame is brought into contact with the vicinity of the armature supporting hinge provided at the tip of the yoke, so that the hinge of the yoke does not touch the coil frame. Therefore, the distance between the hinge part and the coil frame can be made accurate, which stabilizes the characteristics and makes assembly easier. Even when an insulator is interposed between the two, it is easy to insert the insulator, so that assembly can be easily performed in this respect as well, without having to worry about misalignment of the yoke.

[Brief explanation of the drawing]

Fig. 1 is a cutaway perspective view of the relay of the present invention - an embodiment, Fig. 2 is a perspective view with the cover removed, Fig. 3 is an exploded perspective view, Fig. 4 is an exploded perspective view of the coil block, and Fig. 5 is a perspective view of the relay according to the present invention. 6 is an enlarged perspective view of the main parts, 4 is an armature, 8 is a coil, 9 is a coil frame, 11 is a yoke, 12 is a hinge portion, and 13 is a protrusion. .

Claims (1)

[Scope of utility model registration request] One piece of L-shaped yoke is attached to one end of the coil frame around which the coil is wound, and the other piece of yoke is placed along the coil frame, and the protrusion protruding from the other end of the coil frame is attached to the yoke. A yoke positioning structure that comes into contact with the armature support hinge provided at the other end of the armature.