Antenna coil assembly for an automobile transponder key system

Details Antenna coil assembly for an automobile transponder key system Antenna coil assembly for an automobile transponder key system

H - Electricity

01

F

H01F 5/02 (2006.01) B60R 25/04 (2006.01) H01F 41/04 (2006.01) H01Q 1/32 (2006.01) H01Q 7/00 (2006.01)

Patent

CA 2123062

A coil assembly (10) includes a plastic bobbin (12) with wire (30,32) coiled thereon and coupled to the pins (38, 48, 54) of a connector (40). Plastic overmolding (60) covers wires (30,32) within bobbin (12) and fixes connector (40) relative to bobbin (12). A polyester bobbin (12) is made by injecting polyester into a mold having cavities (101, 151) to define the outer circumference of the bobbin and surrounding an arbor (106, 160) to define the inner circumference of the bobbin. The arbor (106, 160) with the molded bobbin (12) is removed from between the cavities (101, 151) and the bobbin (12) is slid laterally off the arbor by applying generally uniform pressure about a lateral edge (20, 22) of the bobbin so as not to warp same during the removal process.

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