JPS6011625Y2 - Closed magnetic circuit ignition coil - Google Patents

Description

【考案の詳細な説明】 本考案は内燃機関の点火装置に用いられる閉磁路型イグ
ニションコイルに関腰閉磁路を形成し得る鉄心のコイル
装着部に対して１次および２次コイルを正しく位置決め
して装着し得るようにした、前記イグニションコイルを
提供することを目的する。[Detailed description of the invention] The present invention is a closed magnetic circuit type ignition coil used in an ignition system for an internal combustion engine. It is an object of the present invention to provide the above-mentioned ignition coil, which can be mounted on the ignition coil.

以下、図面により本考案の一実施例について説明すると
、１は合成樹脂により成形され、上部を開口させた絶縁
ケースで、一方の対向する円内側面にはそれぞれ鉄心半
体２□、２゜の挿入溝３が開口し、それら挿入溝３の底
面上部には鉄心半体２１．２□の抜止め用突起４が形成
される。Hereinafter, one embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes an insulating case molded from synthetic resin with an open top, and on one opposing inner side of the circle there are iron core halves 2□ and 2°, respectively. The insertion grooves 3 are open, and projections 4 for preventing the iron core half body 21.2□ from falling out are formed at the upper part of the bottom surface of the insertion grooves 3.

また絶縁ケース１の底部内面には１次コイル５を嵌合す
る一対のコイル保持板６が互いに平行に、且つ挿入溝３
開口幅と同一の間隔をとって対向して立設されている。Further, on the inner surface of the bottom of the insulating case 1, a pair of coil holding plates 6 into which the primary coil 5 is fitted are arranged parallel to each other and in the insertion groove 3.
They are erected facing each other with the same distance as the opening width.

両鉄心半体２１，２゜は薄いケイ素鋼板を積層したもの
で、水平磁路片７と、この水平磁路片７の中間部より垂
直に突出するコイル保持板装着部構戊用中間磁構成８と
、水平磁路片７の両端部より中間磁路片８と同一方向に
、且つ平行に突出すると共に中間磁路片８よりも僅かに
長い一対の側磁路片９とよりなる。Both iron core halves 21 and 2° are made of laminated thin silicon steel plates, and include a horizontal magnetic path piece 7 and an intermediate magnetic structure for a coil holding plate mounting part structure that protrudes perpendicularly from the middle part of this horizontal magnetic path piece 7. 8, and a pair of side magnetic path pieces 9 that protrude from both ends of the horizontal magnetic path piece 7 in the same direction and parallel to the intermediate magnetic path piece 8 and are slightly longer than the intermediate magnetic path piece 8.

１次コイル５および２次コイル１０は何れも角筒形をな
し、１次コイル５の外部形状は２次コイル１０の内部に
嵌合されるように形成され、また１次コイル５の内部形
状はコイル保持板６に嵌合し得るように形成される。Both the primary coil 5 and the secondary coil 10 have a rectangular cylindrical shape, and the external shape of the primary coil 5 is formed to fit inside the secondary coil 10, and the internal shape of the primary coil 5 is formed to fit inside the secondary coil 10. is formed so as to be able to fit into the coil holding plate 6.

一方の鉄心半体２□は、その水平磁路片７を下向きにし
て両挿入溝３およびコイル保持板６間に挿入され、その
際挿入溝３の突起４は鉄心半体２１により押されて外方
へ逃げる。One core half 2 □ is inserted between both insertion grooves 3 and the coil holding plate 6 with its horizontal magnetic path piece 7 facing downward, and at this time, the protrusion 4 of the insertion groove 3 is pushed by the core half 21. flee to the outside.

そして１次コイル５を２次コイル１０に嵌合し、次いで
１次コイル５を両コイル保持板６の外側に嵌合して両コ
イル５，１０を絶縁ケース１内に収容すると、それらコ
イル保持板６により１次コイル５内側面と中間磁路片８
外側面との間に一定の間隙ｇ１が形成され、これにより
両コイル５，１０が鉄心半体２□の中間磁路片８に対し
て位置決めされる。Then, when the primary coil 5 is fitted to the secondary coil 10, and then the primary coil 5 is fitted to the outside of both coil holding plates 6 and both coils 5 and 10 are housed in the insulating case 1, the coils are held. The inner surface of the primary coil 5 and the intermediate magnetic path piece 8 are connected by the plate 6.
A predetermined gap g1 is formed between the coils 5 and the outer surface, and thereby both coils 5 and 10 are positioned with respect to the intermediate magnetic path piece 8 of the iron core half 2 □.

その後他方の鉄心半体２□を、その水平磁路片７を上向
きにして両挿入溝３およびコイル保持板６間に挿入する
と、中間磁路片８が１次コイル５内に挿入されて雨中間
磁路片８端面間に所定の間隙ｇ２が形成され、また対向
する両側磁路片９の端面相互が衝合されて、両鉄心半体
２□、２゜により鉄心２が構成される。Then, when the other core half 2 □ is inserted between both insertion grooves 3 and the coil holding plate 6 with its horizontal magnetic path piece 7 facing upward, the intermediate magnetic path piece 8 is inserted into the primary coil 5 and the magnetic path piece 8 is inserted into the primary coil 5. A predetermined gap g2 is formed between the end faces of the intermediate magnetic path piece 8, and the end faces of the opposing magnetic path pieces 9 on both sides are brought into contact with each other, so that the iron core 2 is constituted by the two iron core halves 2□ and 2°.

この状態において、上部の鉄心半体２゜の水平磁路片７
の両端にそれぞれ突起４が係合するので、その鉄心半体
２□が抜止め固定される。In this state, the horizontal magnetic path piece 7 of 2° of the upper core half
Since the protrusions 4 are engaged with both ends of the iron core half body 2 □, the core half body 2 □ is fixed to prevent it from coming off.

上記のように上部の鉄心半体２２の中間磁路片８を１次
コイル５内に挿入することにより、両者５，８の内、外
側面内に前記同様に間隙ｇ、が形威され、これにより雨
中間磁路片８によるコイル装着部に両コイル５，１０が
両コイル保持板６を介して正しく位置決めされる。By inserting the intermediate magnetic path piece 8 of the upper core half 22 into the primary coil 5 as described above, a gap g is formed in the inner and outer surfaces of both 5 and 8, as described above. As a result, both coils 5 and 10 are correctly positioned via both coil holding plates 6 at the coil mounting portion formed by the intermediate magnetic path piece 8.

その後、一対の１次端子１１および２次端子１２をもつ
絶縁性端子板１３を絶縁ケース１の開口部に嵌合し、そ
の端子板１３の開口１４を通じて絶縁ケース１内にエポ
キシ樹脂等の絶縁物■を充填し、さらに開口１４より溢
れさせて端子板１３上面を覆い硬化させる。Thereafter, an insulating terminal plate 13 having a pair of primary terminals 11 and secondary terminals 12 is fitted into the opening of the insulating case 1, and an insulating material such as epoxy resin is inserted into the insulating case 1 through the opening 14 of the terminal plate 13. The material (3) is filled and then allowed to overflow from the opening 14 to cover the upper surface of the terminal board 13 and harden.

これにより鉄心２．１次および２次コイル５，１０およ
び端子板１３が絶縁物Ｉ内に埋設される。As a result, the iron core 2, the primary and secondary coils 5, 10, and the terminal plate 13 are buried in the insulator I.

なお、１次コイル５の一端は電源側の一方の１次端子１
１に、また他端は２次コイル１０の一端に接続されると
共にアース側の他方の１次端子１１にそれぞれ接続され
る。Note that one end of the primary coil 5 is connected to one primary terminal 1 on the power supply side.
1, and the other end is connected to one end of the secondary coil 10 and to the other primary terminal 11 on the ground side.

２次コイル１０の他端は２次端子１２に接続される。The other end of the secondary coil 10 is connected to a secondary terminal 12.

上記構成において、１次コイル５に通電すると、鉄心２
の中間磁路片８、上部の水平磁路片７、両側の側磁路片
９、下部の水平磁路片７、中間磁路片８を通る二経路の
閉磁路が形威され、次いで１次コイル５の通電を断つと
２次コイル１０に高電圧が発生する。In the above configuration, when the primary coil 5 is energized, the iron core 2
A closed magnetic path with two paths passing through the intermediate magnetic path piece 8, the upper horizontal magnetic path piece 7, the side magnetic path pieces 9 on both sides, the lower horizontal magnetic path piece 7, and the intermediate magnetic path piece 8 is formed, and then 1 When the secondary coil 5 is de-energized, a high voltage is generated in the secondary coil 10.

この場合両中間磁路片８間の間隙＆によりヒステリシス
を減少させ、遮断電流に対する有効磁束変化を大きくす
ることができる。In this case, the hysteresis can be reduced by the gap & between both intermediate magnetic path pieces 8, and the change in effective magnetic flux with respect to the interrupting current can be increased.

以上のように本考案によれば、絶縁ケース１の底部内面
に一対のコイル保持板６，６を対向させて立設し、それ
らコイル保持板６，６間に閉磁路を形威し得る鉄心２の
コイル装着部８，８を挿入し、前記両コイル保持板６，
６の外側に筒状１次コイル５を、その１次コイル５の外
側に筒状２次コイル１０をそれぞれ嵌合したので、各コ
イル５．１０を、前記コイル保持板６，６を介して鉄心
２のコイル装着部８，８に正しく位置決めすることがで
きる。As described above, according to the present invention, a pair of coil holding plates 6, 6 are arranged upright on the bottom inner surface of the insulating case 1, and an iron core can form a closed magnetic path between the coil holding plates 6, 6. Insert the coil mounting parts 8, 8 of No. 2, and attach both the coil holding plates 6,
Since the cylindrical primary coil 5 and the cylindrical secondary coil 10 were fitted on the outside of the primary coil 5 and the cylindrical secondary coil 10 were fitted on the outside of the primary coil 5 and the cylindrical secondary coil 10, respectively, each coil 5. Correct positioning of the coil mounting portions 8, 8 of the iron core 2 is possible.

【図面の簡単な説明】[Brief explanation of drawings]

図面は本考案の一実施例を示すもので、第１図は分解斜
視図、第２図は縦断側面図、第３図は第２図■−■線断
面図、第４図は第１図ＩＶ−ＩＶ線断面図である。 １・・・・・・絶縁ケース、２・・・・・・鉄心、５・
・曲１次コイル、６・・・・・・コイル保持板、８・曲
・コイル装着部を構成する中間磁路片、１０・・・・・
・２次コイル。The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view, FIG. 2 is a vertical side view, FIG. 3 is a sectional view taken along the line ■--■ in FIG. 2, and FIG. 4 is a diagram showing FIG. It is a sectional view taken along the line IV-IV. 1...Insulation case, 2...Iron core, 5.
- Curved primary coil, 6... Coil holding plate, 8 - Intermediate magnetic path piece constituting the bent/coil mounting part, 10...
・Secondary coil.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 絶縁ケース１の底部内面に一対のコイル保持板６．６を
対向させて立設し、それらコイル保持板６．６間に閉磁
路を形成し得る鉄心２のコイル装着部８，８を挿入し、
前記両コイル保持板６，６の外側に筒状１次コイル５を
、その１次コイル５の外側に筒状２次コイル１０をそれ
ぞれ嵌合してなる閉磁路型イグニションコイル。A pair of coil holding plates 6.6 are set upright on the bottom inner surface of the insulating case 1, facing each other, and the coil mounting parts 8, 8 of the iron core 2, which can form a closed magnetic path, are inserted between the coil holding plates 6.6. ,
A closed magnetic circuit type ignition coil in which a cylindrical primary coil 5 is fitted on the outside of both the coil holding plates 6, 6, and a cylindrical secondary coil 10 is fitted on the outside of the primary coil 5.