Importance

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Abstract

When a contact terminal 11 is mounted by being inserted into a bobbin 12 from the bottom end thereof, the contact terminal 11 is fixed to the bottom part of the bobbin 12 by the action of raised tabs 11c which prevents the contact terminal 11 from coming off. Next, a folded portion 13c formed on the bottom end of a coil element 13 is inserted into the bobbin 12 from the top thereof, and the folded portion 13c is fixed there by being press-fitted between press-fitting members 11b. Next, a top cover portion 10 is fitted by insertion to the bobbin 12 from the top of the coil element-supporting bobbin 12. As a result, four coupling members 10a are fixed by being inserted between first ribs 12c and second ribs 12d formed in the bottom part of bobbin 12. Since this helical antenna is assembled without the need of using assembly jigs or tools and without using adhesives, assembly can be done easily, and costs can be reduced.

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First Claim