JPH0113393Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an insulating holder for combining an E-shaped core and an I-shaped or E-shaped core so as to form a closed magnetic path.

An example of a conventional transformer using an E-type core and an I-type core is shown in FIG. This transformer is made as follows. First, a winding coil made of winding wire 2 on an insulating bobbin 1 is passed through the center leg of the E-shaped core 3, and then the I-shaped core 4 is butted against the end face of each leg, and the coil is placed over both cores 3 and 4. Wrap insulating tape (not shown) and temporarily assemble. Next, a notch is made in the corner of the metal fitting 5 bent into a U-shape, and both sides of the metal fitting 5 are bent inward at almost right angles to form a flange 51 that prevents the core from shifting. Several tongue pieces 52 are formed. Inside this metal fitting 5,
Insert the temporarily assembled core with the tongue piece 52 raised up, and then insert the tongue piece 5 so that it comes into contact with the top surface of the I-shaped core 4.
Can be assembled by folding 2 pieces. The same applies when an E-type core is used instead of an I-type core. In addition, when this transformer is to be attached to the part to be attached by screwing, a metal fitting 5 with a mounting piece 53 having a hole for screwing as shown by the one-dot chain line is used.

As is clear from the above description, the conventional metal fittings have the disadvantage that a large number of man-hours are required for temporarily assembling the core using tape and bending the tongue piece 52.

The present invention aims to provide a holder that allows easy assembly of an E-shaped core and an I-shaped core or an E-shaped core and an E-shaped core.

Examples of the present invention will be described below.

FIG. 2 shows a perspective view of an embodiment in which an E-shaped core 3 and an I-shaped core 4 are assembled using a holder according to the present invention.

The holder 6 is made of a flexible insulating material such as synthetic resin, and has a space large enough to cover almost the entire outer surface of the outer leg including the corner portions of the abutted cores 3 and 4. It is a box body. When the cores 3 and 4 are assembled into this holder 6, the outer leg of the core 3 is placed in the center of the opposite side (the long side in the figure) of the opening adjacent to the window formed by the cores 3 and 4. An inwardly extending locking pawl 61 that engages with the inner surface is provided. Further, a mounting piece 62 is integrally formed at one end of the holder 6 and extends in a direction opposite to the opening. Further, on both edges of the openings in contact with the outer circumferential surfaces of the cores 3 and 4, at least one side, in this case, on the side opposite to the mounting piece 62, that is, on the edge of the openings in contact with the outer surfaces of the cores 4, parallel to each other is provided. A tongue piece 64 is formed by making two cuts 63. Moreover, an inward projection 65 is integrally provided at the tip of the tongue piece 64. Such holding by the holder 6 is performed on both outer leg portions of the closed magnetic circuit core formed by the cores 3 and 4.

FIG. 3 shows a perspective view of a transformer constructed using the holder 6 shown in FIG.

After fitting the bobbin 1 with the winding 2 on the central leg of the E-shaped core 3, the I-shaped core 4 is butted against the end face of the leg of the core 3, and the outer surfaces of the outer legs of the cores 3 and 4 are in this state. Apply the opening of the holder 6 and press it toward the center leg. In this way, the side wall of the holder 6 bulges outward due to the elasticity of the material, and the locking claw 61
The tip of the tongue piece 64 comes into contact with the inner surface of the outer leg portion of the core 3, and at the same time, the tongue piece 64 curves upward and the protrusion 65 comes into contact with the upper surface of the core 4. Such an assembly is the same when an E-shaped core is used instead of the I-shaped core 4.

The holder 6 is prevented from coming off the cores 3 and 4 by the locking claws 61. Furthermore, since the outer surfaces and side surfaces of the outer legs of the cores 3 and 4 come into contact with the inner bottom and inner surface of the holder 6, displacement of the cores 3 and 4 in a direction parallel to the base bottom surface is prevented. Furthermore, the elasticity of the tongue piece 64 presses the cores 3 and 4 in the abutting direction. Since such holding is performed by the two holders 6 on both outer leg parts including the corner parts of the cores 3 and 4, there is no possibility that the cores 3 and 4 will come off.

As explained above, the holder according to the present invention is
E-type and I-type cores or E-type and E-type cores can be assembled very easily. Moreover, it has the advantage of being able to firmly hold the core and being lighter than conventional metal fittings, making it possible to further reduce the weight of the transformer.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of the structure of a conventional transformer, FIG. 2 is a perspective view showing an embodiment of the present invention before the E-type core and I-type core are assembled, and FIG. 3 is a perspective view showing an example of the structure of a conventional transformer. FIG. 2 is a perspective view showing an example of a transformer using the holder according to the invention. 1... Insulating bobbin, 2... Winding wire, 3... E type core, 4... I type core, 5... Metal fitting, 53, 62
...Mounting piece, 6...Holder, 61...Latching claw, 6
4... Tongue piece.

Claims (1)

[Scope of utility model registration request] A box-shaped insulating holder that accommodates the outer legs including the corner portions of the core that constitutes a closed magnetic path with an E-shaped core and an I-shaped or E-shaped core, and when the core is accommodated, the core Both edges of the opening of the holder adjacent to the window are provided with inward claws for preventing the core from coming off, while both edges of the opening of the holder adjacent to the outer peripheral surface of the core are provided with inward claws for preventing the core from coming off. A holder for a core, characterized in that at least one of the parts is provided with a tongue piece having an inward protrusion.