JPH01112030U

JPH01112030U -

Info

Publication number: JPH01112030U
Application number: JP588588U
Authority: JP
Priority date: 1988-01-22
Filing date: 1988-01-22
Publication date: 1989-07-27

Description

[Brief explanation of drawings]

第１図は本考案の点火コイルの第１実施例の全
体の断面図、第２図は第１図の要部の拡大断面図
、第３図は第２実施例の、第４図は第３実施例の
、第５図は他の一実施例の夫々要部の拡大断面図
、第６図は従来の点火コイルの閉磁路で生じる磁
束の説明図である。図中、１は１次コイル、１′はそのボビン、２
は２次コイル、３は有底のケース、４は絶縁樹脂
層、５は１次端子の取付台、６は１次端子、７と
８は閉磁路を構成する対の鉄心、９はギヤツプ、
１４は遊離した鉄心の端部に設けた凹部、１６は
スペーサー、１７は凸部を示す。 FIG. 1 is an overall sectional view of the first embodiment of the ignition coil of the present invention, FIG. 2 is an enlarged sectional view of the main part of FIG. 1, FIG. 3 is the second embodiment, and FIG. FIG. 5 is an enlarged cross-sectional view of essential parts of another embodiment, and FIG. 6 is an explanatory diagram of magnetic flux generated in a closed magnetic path of a conventional ignition coil. In the figure, 1 is the primary coil, 1' is its bobbin, and 2
is a secondary coil, 3 is a case with a bottom, 4 is an insulating resin layer, 5 is a mounting base for a primary terminal, 6 is a primary terminal, 7 and 8 are a pair of iron cores forming a closed magnetic circuit, 9 is a gap,
14 is a recess provided at the end of the free iron core, 16 is a spacer, and 17 is a convex portion.

Claims

[Claims for Utility Model Registration] (1) A primary coil and a secondary coil fitted outside the primary coil are housed in a case, and both coils are embedded in the case by an insulating resin layer cast into the case. At the same time, a mounting base equipped with a primary terminal is fixed in a semi-buried state in the open part of the case, and a part of the pair of iron cores constituting a closed magnetic path with a gap is inserted into the bobbin of the primary coil. A penetrating closed magnetic circuit type molded ignition coil, characterized in that the gap formed by the pair of iron cores is located outside the bobbin of the primary coil, and a holding portion for the gap is provided in an extension shape on the mounting base. A closed magnetic circuit molded ignition coil. (2) The closed magnetic circuit type molded ignition coil according to claim 1, wherein the gap holding portion comprises a spacer that protrudes between the gaps and a convex portion that engages with a concave portion provided in one of the iron cores. (3) A primary coil and a secondary coil fitted outside the primary coil are housed in a case, both coils are embedded in the case by an insulating resin layer cast in the case, and a primary terminal is provided. A closed magnetic path type molded ignition coil in which a mounting base is fixed in a semi-buried state in an open part of the case, and a part of a pair of iron cores forming a closed magnetic path with a gap penetrates into the bobbin of the primary coil. In the closed magnetic circuit, the gap formed by the pair of iron cores is located outside the bobbin of the primary coil, and a holding portion for the gap is provided in an extension shape on the bobbin of the primary coil. Type mold ignition coil. (4) The closed magnetic circuit type molded ignition coil according to claim 3, wherein the gap holding portion comprises a spacer that protrudes between the gaps and a convex portion that engages with a concave portion provided in one of the iron cores.