Ferrite core type transformer

A ferrite core type transformer which comprises:

• a ferrite core unit comprising a first core member having first and second end faces, a second core member having first and second end faces, said first and second core members being positioned with respect to each other such that the first and second end faces of the first core member are aligned with the first and second end faces of said second core member thereby forming a closed magnetic path, and a first bonding agent having a quick hardening property at room temperature, said first bonding agent being applied between the first end faces of the first and second core members, and also between the second end faces of the first and second core members for rigidly connecting the first and second core members together, each of said first and second core members having a U-shaped configuration such that, when the first and second core members have been connected together, said core unit has a generally O-shape;
• a coil unit comprising an inner bobbin for supporting a primary winding therearound, said inner bobbin having a bore therein for receiving said ferrite core unit, an outer bobbin for supporting a secondary winding therearound, said outer bobbin being arranged coaxially with said inner bobbin, a casing for housing said inner and outer bobbins therein and including guide means for receiving a portion of said core unit, and a thermosetting plastic filled in said casing;
• a second bonding agent having a resiliency, said second bonding agent being positioned in said guide means between said guide means and one of said core members for bonding said coil unit and said core unit, the connection between the first end faces of the first and second core members being located outside the coil unit;
• and
• a holder means for engaging said first and second core members and holding the first and second core members together at the area of connection between the first end faces of the first and second core members.