JPH028114U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2a is a plan view of FIG. 1, FIG. 2b is an enlarged view of the through hole in FIG. 1, and FIG. is a conventional sectional view, FIG. 4 is a plan view of FIG. 3, FIG. 5 is an enlarged view of the lead part, FIG. 6 is a BB sectional view of FIG. 5, and FIG. FIG. 7 is a schematic diagram of the lead portion of the coil, FIG. 8 is a sectional view of injection molding, and FIG. 9 is an equivalent circuit diagram of the rotary transformer. 101... Ferrite core, 102... Annular groove, 103... Resin, 104... Conductive member, 105
...core through hole.

Claims (1)

[Claims for Utility Model Registration] 1. In a rotary transformer in which a coil-shaped conductor is directly formed in a spiral shape on at least one surface of a ferrite core by means such as plating, vapor deposition, sputtering, etc., the coil of the ferrite core is A core through hole is formed in the axial direction of the rotary transformer, which crosses the coil, has a width in the radial direction, and has at least two or more lead wire through holes in the core through hole. A rotary transformer in which
A rotary transformer characterized in that the cross-sectional shape of the through-hole provided in the ferrite core has an irregular shape at both ends with respect to a center portion in the direction of the core through-hole. 2. Utility Model Registration The rotary transformer according to claim 1, characterized in that a non-magnetic resin formed in the core through-hole of the ferrite core protrudes in a direction opposite to the coil forming surface. 3 Utility model registration Claims 1 and 2, wherein at least one or more conductive material is formed in each of at least two or more lead-out wire through holes formed in the non-magnetic resin. A rotary transformer featuring: 4 In claim 3 of the utility model registration claim, the resin protruding in the opposite direction to the coil forming surface or the conductive material provided in the lead wire through hole of the resin is in contact with a relay board that relays with other circuits, and the resin A rotary transformer characterized in that it has a structure that allows direct electrical connection between a relay board and the coil through a conductive material formed therein. 5 Utility Model Registration Claims 1, 2, 3, and 4, wherein a portion of the resin provided in the core through-hole that is in contact with the ferrite core on a surface opposite to the coil forming surface is made of ferrite. A rotary transformer characterized by being formed lower than the core surface.