JPH0536255Y2 - - Google Patents

Description

[Detailed Description of the Invention] [1] Industrial Application Field The present invention relates to the structure of a high frequency transformer used for impedance matching in, for example, television receiving equipment.

[2] Prior Art Some conventional high-frequency transformers include a ferrite core having a plurality of through holes and winding around a ferrite core commonly called a spectacle-shaped core.

[3] Problems that the invention aims to solve The surface of the ferrite core used in this type of high-frequency transformer is rough and rough, like a file, and its edges have the property of being sharp like a knife. have.

Therefore, when an insulated conducting wire is directly wound around a ferrite core, there is a risk that the insulating coating of the conducting wire that contacts the end edge of the ferrite core may be peeled off, resulting in poor insulation or wire breakage.

[4] Means for solving the problem The present invention provides a high frequency transformer that eliminates the above-mentioned drawbacks.

Hereinafter, the present invention will be explained with reference to the illustrated embodiments.

FIG. 1 is a sectional view of an embodiment of the high frequency transformer of the present invention, and FIG. 2 is an exploded perspective view thereof.

In the drawing, 1 is a ferrite core having a plurality of through holes 2, 3 is a recess provided at the open end of each of the through holes, and 4 and 5 are insulating covers covering the upper and lower surfaces of the ferrite core 1. The outer shape of each of the ferrite cores is made to be approximately equal to the size of each surface of the ferrite core 1. Reference numeral 6 denotes a protrusion having an insertion hole 7 formed on each inner surface of the insulating covers 4 and 5. The protrusion 6 fits into the recess 3 formed on the upper and lower surfaces of the ferrite core 1. is set to be equal to or slightly smaller than the diameter of the through hole 2 of the ferrite core. Reference numeral 8 denotes a locking portion for locking the end of the winding 9, which is formed integrally with one of the insulating covers 5.

[5] Functions and Effects of the Invention Since the present invention has the above-described configuration, the winding 9 can be inserted into the insertion holes 7 of the protrusions 5 provided in the insulating covers 4 and 5 and in each of the insulating covers 4 and 5. The winding wire is wound around the ferrite core 1 via the outer edge, so that the winding wire does not come into direct contact with the edge portion of the ferrite core, thereby preventing insulation failure or disconnection due to peeling of the insulation coating of the winding wire. There is an advantage that it can be done.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the high frequency transformer of the present invention, and FIG. 2 is an exploded perspective view thereof. 1... Ferrite core, 2... Through hole, 3...
Recessed portion, 4, 5...Insulating cover, 6...Protrusion portion,
7...Insertion hole, 8...Locking part, 9...Winding wire.

Claims (1)

[Scope of utility model registration request] A ferrite core having a plurality of through holes through which windings are inserted and having a concave portion at the open end of each of the through holes, and a protruding portion having an insertion hole and fitting into each concave portion of the ferrite core. The outer shape of each of the insulating covers is approximately equal to the upper and lower surfaces of the ferrite core, and the inner diameter of the insertion hole of each protrusion is equal to the diameter of the through hole of the ferrite core. A high frequency transformer characterized by being slightly smaller than this.