Patent ID: 6439933
Filing Date: 2002-08-27
Classification: H01R

Abstract:
In a multi-polar coaxial plug comprising:plug components including a head; a center pin integrally connected with a rear end side of said head; an outer cylindrical sleeve to be coaxially fitted around an outer periphery of said center pin; a plurality of metal rings positioned between a front face side of said outer cylindrical sleeve and a rear face side of said head and to be coaxially fitted on and around the outer periphery of said center pin in a longitudinally parallel relationship; and a plurality of metal connection terminal pieces extending from said metal rings in an integral manner or through intermediary members to provide a unit of a plug assembly, said unit of a plug assembly being adapted to be set in a cavity of a metal mold with said plug components at predetermined positions in said metal mold, the improvement which comprises: a shaped body formed of a resin material, said shaped body having an axially extending center bore to permit said center pin extending from the rear end side of said head to be fittingly inserted thereinto, said shaped body also having, on its outer peripheral surface, a fitting surface to be fitted within the outer cylindrical sleeve, and said shaped body further having formed, at an intermediate radial part between said fitting surface and said center bore, through-holes for fittingly inserting into each one thereof one of said plurality of connection terminal pieces to be connected with a plurality of metal rings positioned between the front end face of said outer cylindrical sleeve and said rear end face of said head, and wherein said shaped body is provided with a flow-path (z) adjacent said outer cylindrical sleeve, to permit flow of resin material to be injected under pressure, in a manner to be disposed in an annular form with a predetermined space interval in the circumferential direction, as viewed from the rear face, of said shaped body, a rear end side of said center pin extending from said head, the outer cylindrical sleeve, the shaped body, and rear end sides of said plurality of connection terminal pieces being assembled together in an intermediate fixed assembly, said plug being formed by setting said intermediate fixed assembly in the metal mold, and molding the same with use of the resin material in an integral structure.