Patent ID: 8922322
Filing Date: 2014-12-30
Classification: H01F

Abstract:
1. A combined structure of hollow bobbin and conductive sheet for a transformer, comprising: a hollow bobbin having an outer surface and at least one positioning structure formed on the outer surface; at least one conductive sheet fit on the outer surface of the hollow bobbin and comprising a main body and at least one engaging structure, wherein the main body has a hollow portion, wherein the hollow portion makes the main body to have an inner circumference, wherein the engaging structure is formed on the inner circumference of the main body and is engaged with the positioning structure of the hollow bobbin; and at least two protrusion sets protruded on the outer surface of the hollow bobbin, wherein each of the protrusion sets comprises a plurality of protrusions, and the protrusions are spaced apart from each other and surround the outer surface of the hollow bobbin, wherein the positioning structure is connected between adjacent two of the protrusions belonging to the protrusion sets different from each other, and the positioning structure is a positioning groove formed in a notched configuration extending inwardly from the outer surface; wherein the transformer comprises at least one winding disposed on the outer surface of the hollow bobbin and abutting against the conductive sheet.