20-07-2017 дата публикации
Номер: US20170207520A1
A vehicle antenna device has a stably held coil element while its winding shape is maintained, and the number of turns of the coil element winding is easily adjusted during production. A coil element is configured by forming a winding around a resin-made bobbin. A guide groove, which is a path of the winding, and a plurality of projections, which are along the path of the winding, are disposed on the outer circumferential surface of the winding barrel of the bobbin. The guide groove spirally extends around the outer circumferential surface of the winding barrel. The projections are disposed in plural numbers in each of a plurality of circumferential positions on the outer circumferential surface of the winding barrel. A winding end portion of the winding is drawn out in the axial direction while being hooked to an arbitrary one of the projections, and electrically connected to an upper terminal. 1. A vehicle antenna device comprising:an antenna base;an antenna case which is overlaid on the antenna base; andan antenna element and an amplifier board which are disposed inside the antenna case, whereinthe antenna element has a capacitive element and a coil element,the coil element is configured by forming a winding around a bobbin,a first terminal is disposed on a side of one end of the bobbin, the first terminal being electrically connected to one end of the coil element, and electrically connected to the capacitive element,a second terminal is disposed on a side of the other end of the bobbin, the second terminal being electrically connected to the other end of the coil element, and electrically connected to the amplifier board,a plurality of projections are disposed on an outer circumferential surface of the bobbin, and along a winding path of the coil element, andan end portion of the coil element is drawn out in an axial direction while being hooked on one of the plurality of projections.2. The vehicle antenna device according to claim 1 , wherein one or more of ...
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