COIL UNIT AND IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINE

To provide a technology that can suppress a gap that may occur between a primary conductor and a primary bobbin when the primary conductor starts winding around the primary bobbin.SOLUTION: A primary coil is formed by stacking a primary conductor 81 while being wound around a primary bobbin 41. The...

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Bibliographische Detailangaben
Hauptverfasser:	KAWAGUCHI EIJI, YOSHIHARA DAIKI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BASIC ELECTRIC ELEMENTS BLASTING COMBUSTION ENGINES ELECTRICITY HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES INDUCTANCES LIGHTING MAGNETS MECHANICAL ENGINEERING SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES TRANSFORMERS WEAPONS
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Beschreibung
Zusammenfassung:	To provide a technology that can suppress a gap that may occur between a primary conductor and a primary bobbin when the primary conductor starts winding around the primary bobbin.SOLUTION: A primary coil is formed by stacking a primary conductor 81 while being wound around a primary bobbin 41. The primary bobbin 41 has a bobbin cylindrical portion 411, a first flange portion 412, and a second flange portion 413. A winding portion 53 excluding one end and the other end of the primary conductor 81 is wound around the bobbin cylindrical portion 411. The first flange portion 412 extends radially outwards from one end of the bobbin cylindrical portion 411 in the axial direction. The second flange portion 413 extends radially outwards from the other end of the bobbin cylindrical portion 411 in the axial direction. The first flange portion 412 has a tapered surface 450 on a facing surface 415 opposite the second flange portion 413. The tapered surface 450 approaches the second flange portion 413 as it moves towards the direction in which the primary conductor 81 is wound.SELECTED DRAWING: Figure 7 【課題】１次ボビンの周囲に１次導線を巻回し始める際に、１次導線と１次ボビンとの間に生じ得る隙間を抑制できる技術を提供する。【解決手段】１次コイルは、１次ボビン４１に１次導線８１が巻回されつつ積層されることにより形成される。１次ボビン４１は、ボビン筒状部４１１と、第１フランジ部４１２と、第２フランジ部４１３とを有する。ボビン筒状部４１１の周囲には、１次導線８１の一端と他端とを除く巻回部５３が巻回される。第１フランジ部４１２は、ボビン筒状部４１１の軸方向一方側の端部から径方向外側へ拡がる。第２フランジ部４１３は、ボビン筒状部４１１の軸方向他方側の端部から径方向外側へ拡がる。第１フランジ部４１２は、第２フランジ部４１３と対向する対向面４１５に、テーパ面４５０を有する。テーパ面４５０は、１次導線８１が巻回される方向へ向かうにつれて、第２フランジ部４１３に近付く。【選択図】図７