ON-VEHICLE ANTENNA DEVICE

• Main Authors: OSAWA KENGO, ONO SADAO
• Format: Patent
• Language: English; Japanese
• Published: 08.02.2016
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; ELECTRICITY

PROBLEM TO BE SOLVED: To provide an on-vehicle antenna device which can be held stably while keeping the winding shape of a coil element, and the number of turns of the winding of coil element can be adjusted easily in the manufacturing process.SOLUTION: A coil element 40 is manufactured by applying a winding 42 to a bobbin 41 made of resin. On the outer peripheral surface of the bobbin 41, a guide groove 48a becoming the route of winding, and a plurality of protrusions 48b along the route of the winding 42 are provided. The guide groove 48a goes around the outer peripheral surface of a drum spirally. The plurality of protrusions 48b are provided, respectively, at a plurality of circumferential positions on the outer peripheral surface of a drum. The end-of-winding of the winding 42 is hooked to an arbitrary protrusion 48b and pulled out in the axial direction, before being connected electrically with the upper terminal 45.SELECTED DRAWING: Figure 2 【課題】コイルエレメントをその巻線形状を保ちながら安定して保持することができ、かつ製造過程においてコイルエレメントの巻線のターン数を容易に調整できる車載用アンテナ装置を提供する。【解決手段】コイルエレメント４０は、樹脂製のボビン４１に巻線４２を施したものである。ボビン４１の巻胴部外周面には、巻線４２の経路となるガイド溝４８ａと、巻線４２の経路に沿う複数の突起４８ｂとが設けられる。ガイド溝４８ａは、巻胴部外周面を螺旋状に周回する。突起４８ｂは、巻胴部外周面の複数の周方向位置にそれぞれ複数設けられる。巻線４２の巻き終わり端部は、任意の突起４８ｂに引っ掛けられて軸方向に引き出され、アッパーターミナル４５に電気的に接続される。【選択図】図２