Transformer and coil bobbin therefor
AssigneesWB Transformer Corporation, Nishimoto Gosei Hanbai Co., Ltd.
InventorsTokutaro Kubomura, Shiro Kokura
Life of this patent
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Abstract
A transformer comprising: a coil bobbin which includes a pair of core winding portions and a pair of coupling portions for coupling the core winding portions so as to space the core winding portions a predetermined distance from each other and is formed, on its whole outer periphery, with a groove; a winding which is obtained by winding a conductor around the groove of the coil bobbin a predetermined number of times; and a pair of wound cores each of which is obtained by winding an electromagnetic steel plate around each of the core winding portions of the coil bobbin a predetermined number of times; wherein an outer peripheral surface of each of opposite side walls of the groove at the core winding portions is curved so as to have an arcuate cross-sectional shape.
Claims2
A wound core for use in a transformer having at least one core securing structure, comprising,
- an electromagnetic plate, having a longitudinal shape defined by a first end and a second end, said electromagnetic plate formed into a cylindrical shape by winding the electromagnetic plate a predetermined number of times about a winding axis;
- wherein, said first end is closer to said winding axis than said second end when said plate is wound;
- and
- wherein said electromagnetic plate comprises an engageable portion which is provided at said first end of the electromagnetic plate so as to project towards said winding axis, said engageable portion securing said electromagnetic plate at said first end to at least said core securing structure,
- wherein said projection is formed by a bent portion of said electromagnetic plate, and wherein said bent portion of said electromagnetic plate is formed by bending said plate at an angle approximately 180 degrees.
A wound core for use in a transformer having at least one core securing structure, comprising,
- an electromagnetic plate, having a longitudinal shape defined by a first end and a second end, said electromagnetic plate formed into a cylindrical shape by winding the electromagnetic plate a predetermined number of times about a winding axis;
- wherein, said first end is closer to said winding axis than said second end when said plate is wound;
- and
- wherein said electromagnetic plate comprises an engageable portion which is provided at said first end of the electromagnetic plate so as to project towards said winding axis, said engageable portion securing said electromagnetic plate at said first end to at least said core securing structure,
- wherein said projection is formed by a bent portion of said electromagnetic plate, and wherein said bent portion of said electromagnetic plate is formed by bending said plate at an angle less than 180 degrees.
Dependencies are inferred from the claim text.