JP4506052B2

JP4506052B2 - connector

Info

Publication number: JP4506052B2
Application number: JP2001242797A
Authority: JP
Inventors: 昌樹岡本
Original assignee: Sumitomo Wiring Systems Ltd
Current assignee: Sumitomo Wiring Systems Ltd
Priority date: 2001-08-09
Filing date: 2001-08-09
Publication date: 2010-07-21
Anticipated expiration: 2021-08-09
Also published as: JP2003053773A

Description

【０００１】
【発明の属する技術分野】
本発明は、インサート成形によって製造されるコネクタに関するものである。
【０００２】
【従来の技術】
従来、樹脂成形部の外面から端子金具の端部を突出させた形態のコネクタとして、図１６に示すものである。このコネクタ１００は、一次インサート成形により一次成形樹脂部１０２と端子金具１０３とを一体化させた一次成形品１０１を成形し、二次インサート成形により一次成形品１０１と二次成形樹脂部１０４とを一体化させることにより、樹脂成形部１０５の外面から端子金具１０３の端部１０３Ａを突出させた形態としたものである。
【０００３】
このように２工程のインサート成形を経てコネクタ１００を製造する場合、二次成形用金型１０６には、一次成形品１０１の外面に接触する食い切り部１０７が設けられ、この食い切り部１０７によって一次成形品１０１の外面と二次成形用金型１０６の内面とで囲まれた二次成形用キャビティ１０８を形成し、その二次成形用キャビティ１０８内に溶融樹脂を注入することで二次成形樹脂部１０４が成形されるようになっている。
【０００４】
【発明が解決しようとする課題】
上記従来のコネクタ１００では、樹脂成形部１０５の外面における端子金具１０３の突出領域が二次成形樹脂部１０４によって形成されていたため、二次成形用金型１０６の食い切り部１０７のうち端子金具１０３の突出領域と対応する部分では、その食い切り部１０７を端子金具１０３に接触させる必要がある。そうすると、この食い切り部１０７には、端子金具１０３の端部１０３Ａを嵌入させるための細い孔部１０９を形成しなければならず、そのために、二次成形用金型１０６の構造が複雑になるという問題があった。
【０００５】
尚、インサート成形によって製造されるコネクタとしては、特開昭６３−２１１５７７号公報に開示されているものがある。
本願発明は上記事情に鑑みて創案され、二次成形用金型の構造の簡素化を図ることを目的としている。
【０００６】
【課題を解決するための手段】
請求項１の発明は、樹脂成形部の外面から端子金具の端部を突出させた形態のものであって、一次インサート成形により一次成形樹脂部と前記端子金具とを一体化させた一次成形品を成形し、且つ、一次インサート成形では、複数の前記端子金具がキャリアで連結された連鎖端子の形態で前記一次樹脂成形部と一体化されるとともに、前記一次成形樹脂部における前記キャリアと対応する領域に逃がし孔が貫通して形成され、二次インサート成形において、前記逃がし孔において前記キャリアを切断することにより前記端子金具同士を分離した状態で、二次成形用金型に設けた食い切り部を前記一次成形品の外面に接触させて前記一次成形品の外面と前記二次成形用金型の内面とで囲まれた二次成形用キャビティを形成し、その二次成形用キャビティ内に溶融樹脂を注入することで二次成形樹脂部を成形するとともにその二次成形樹脂部と前記一次成形品とを一体化させて製造されたコネクタにおいて、前記樹脂成形部の外面における前記端子金具の端部の突出領域が、前記一次成形樹脂部によって構成され、前記キャリアの切断によって分離された前記端子金具の間が、前記逃がし孔内に入り込んだ前記二次成形樹脂部によって隔絶されている。
【０００８】
請求項２の発明は、請求項１の発明において、前記一次成形樹脂部は、その外面のうち前記逃がし孔の一方の端部が開口する面において前記二次成形樹脂部と結合されており、前記逃がし孔と前記二次成形樹脂部には、互いに係止することで前記一次成形樹脂部と前記二次成形樹脂部との離脱を規制する係止部が設けられている構成とした。
請求項３の発明は、請求項１又は請求項２の発明において、複数本の前記端子金具が前記逃がし孔の貫通方向と同じ方向に重なるように配列されているコネクタにおいて、前記一次成形品が、一次インサート成形により前記端子金具と一次成形樹脂構成部とを一体化させた形態に成形された複数の一次成形構成部品を、前記逃がし孔の貫通方向と同じ方向に重ね合わせることによって構成されている。
【００１０】
【発明の作用及び効果】
［請求項１の発明］
樹脂成形部の外面における端子金具の端部の突出領域を、一次成形樹脂部によって構成したので、二次成形樹脂部と二次成形用キャビティは、端子金具の突出領域とは別個の領域に配されることになり、二次成形用金型の食い切り部も、端子金具と非接触の位置に配されることになる。したがって、食い切り部には端子金具の端部を嵌入させるための細い孔部を形成する必要がなく、二次成形用金型の構造が複雑にならずに済んでいる。
【００１１】
また、複数の端子金具はキャリアで連結された連鎖端子の形で一次インサート成形用金型にセットすることができるので、端子金具を個別にセットする場合に比べて作業性が良い。また、キャリアの切断は逃がし孔の内部で行われるので、キャリアの切断に伴って一次成形樹脂部の一部を除去する必要がなく、材料が無駄にならずに済む。さらに、キャリアの切断によって分離された端子金具の間には、二次成形樹脂部が介在して、その端子金具間を隔絶するので、端子金具間を確実に絶縁することができる。
【００１２】
［請求項２の発明］
逃がし孔と二次成形樹脂部には互いに係止する係止部が設けられているので、一次成形樹脂部が、その外面のうち逃がし孔の一方の端部が開口する面において二次成形樹脂部と結合された形態であっても、一次成形樹脂部と二次成形樹脂部との離脱を確実に規制することができる。
［請求項３の発明］
一次成形品の一次成形樹脂部を単一部品として成形する場合には、複数本の端子金具を逃がし孔の貫通方向と同じ方向に重なるように配列しようとしても、逃がし孔を成形する上で端子金具が邪魔になるために金型を型開きすることができない。
【００１３】
その点本発明では、一次インサート成形において端子金具と一次成形樹脂構成部とを一体化させた形態の一次成形構成品を複数成形し、その一次成形構成品を逃がし孔の貫通方向と同じ方向に重ね合わせることによって一次成形品を構成しているため、１つの一次成形構成品において、複数の端子金具を逃がし孔の貫通方向に重なるように整列させる必要はない。したがって、一次成形樹脂構成部に逃がし孔を成形するに際して端子金具が邪魔になって型開きができなくなる、ということがない。
【００１４】
【発明の実施の形態】
［実施形態１］
以下、本発明を具体化した実施形態１を図１乃至図１５を参照して説明する。
本実施形態のコネクタＡは、上下両端が開放された角筒状をなす樹脂成形部１０と、この樹脂成形部１０の内壁面に形成された角形突部１１を上下に貫通する複数本の端子金具１４とをインサート成形により一体化させたものである。コネクタＡの製造は、一次インサート成形により、上下方向に細長い複数本の端子金具１４をキャリア１５で連結してなる連鎖端子１３と一次成形樹脂構成部２０，２１とを一体化させた形態の２つの一次成形構成品１７，１８を製造し、各一次成形構成品１７，１８においてキャリア１５を切断して端子金具１４同士を分離し、そのキャリア切断済の２つの一次成形構成品１７，１８を合体させて単一の一次成形品１６を組み上げ、二次インサート成形により、一次成形品１６と二次成形樹脂部３７とを一体化させる、という手順で行われる。
【００１５】
以下、その製造工程を詳しく説明する。尚、説明は、図１及び図２における左側に位置する角形突部１１を対象として行うが、図２における上側に位置する角形突部１２については端子金具の形状が異なるだけでインサート成形の方法については同様なので説明は省略する。また、以下の説明で、左右方向については図３〜図５を基準とし、内外については図１、図６〜図１５における右側を内側ということにする。
【００１６】
さて、連鎖端子１３は、図３及び図４に示すように、複数の端子金具１４を一定ピッチで並列し、その隣り合う端子金具１４同士を、夫々、上下２カ所においてキャリア１５によって連結したものであり、角形突部１１には２つの連鎖端子１３が用いられる。一次インサート成形では、形状の異なる２つの一次成形用金型（図示せず）が用いられ、各一次成形用金型に、夫々、連鎖端子１３が１つずつセットされ、一次成形樹脂構成部２０，２１と連鎖端子１３とが一体化された第１と第２の２つの一次成形構成品１７，１８が得られる（図６〜図９を参照）。
【００１７】
第１の一次成形構成品１７は、図４〜図９に示すように、全体として方形の厚板状をなす一次成形樹脂構成部２０の内面に連鎖端子１３を面一状に露出させるとともに、各端子金具１４の上下両端部１４Ａを一次成形樹脂構成部２０から上下両方へ突出させ、さらに、一次成形樹脂構成部２０における各キャリア１５と対応する複数箇所を内外両面間に貫通させる形態の逃がし孔２２を形成したものである。各逃がし孔２２の内壁における内側の端部には、段差状に切欠した形態の係止部２４が上下一対ずつ形成されている。また、一次成形樹脂構成部２０には、その両左右側面から外面に亘って切欠した形態の上下一対ずつの嵌合溝２６が形成されている。さらに、一次成形樹脂構成部２０の内面には、その周縁部に沿い、且つ上下左右の全辺に亘って連続する枠部２７が突出形成されており、この枠部２７で囲まれた空間は、逃がし孔２２と連通する盆状空間２８とされている。
【００１８】
第２の一次成形構成品１８は、図６〜図９に示すように、全体として方形であって第１の一次成形構成品１７よりも厚い板状をなす一次成形樹脂構成部２１の内面に、連鎖端子１３を面一状に露出させるとともに、各端子金具１４の上下両端部１４Ａを一次成形樹脂構成部２１から上下両方へ突出させ、さらに、一次成形樹脂構成部２１における各キャリア１５と対応する複数箇所を内外両面間に貫通させる形態の逃がし孔２３を形成したものである。各逃がし孔２３の内壁における内側の端部には、段差状に切欠した形態の係止部２５が上下一対ずつ形成されている。また、一次成形樹脂構成部２１には、その内面における左右両側面に沿って内向きに突出した形態の上下一対ずつの嵌合リブ２９が形成されている。さらに、一次成形樹脂構成部２１の左右両側面における外側の端縁には、左右方向に突出する抜止めリブ３０が形成されている。
【００１９】
次に、上記のように成形された２つの一次成形構成品１７，１８においては、各キャリア１５が切断される。切断は、カッタ（図示せず）を各逃がし孔２２，２３内に進入させることによって行われ、キャリア１５の切断により、隣り合う端子金具１４同士が分離される（図５を参照）。
この後、キャリア１５の切断が済んだ第１の一次成形構成品１７と第２の一次成形構成品１８は、その外面と内面とを密着させるようにして、逃がし孔２２，２３の貫通方向と同じ方向に組み付けられる。組付けに際しては、嵌合溝２６と嵌合リブ２９とが嵌合されることで、双方の一次成形樹脂構成部２０，２１が一体化されて一次成形樹脂部１９を構成し、もって、単一の一次成形品１６が得られる（図１０及び図１１を参照）。組み付けられた一次成形品１６は、第１の一次成形構成品１７の端子金具１４と第２の一次成形構成品１８の端子金具１４とが、互いに平行をなし、且つ逃がし孔２２，２３の貫通方向（図１０における左右方向）と同じ方向に重なるように配列されているとともに、第１の一次成形構成品１７と第２の一次成形構成品１８の逃がし孔２２，２３同士が互いに連通した形態となっている。また、第２の一次成形樹脂構成部２１の内面に露出していた端子金具１４は、第１の一次成形樹脂構成部２０によって覆い隠された状態となる。
【００２０】
かかる一次成形品１６は、上下一対の二次成形用金型３１にセットされる（図１２を参照）。二次成形用金型３１には、二次成形樹脂部３７を成形するための角形枠状をなす成形空間３２と、一次成形品１６の一次成形樹脂部１９を遊動不能に収容する収容空間３３と、一次成形品１６の外面に当接する食い切り部３４と、一次成形品１６の一次成形樹脂部１９の上下両面から突出している複数の端子金具１４の端部１４Ａをまとめて収容する端子収容凹部３５とが形成されている。
【００２１】
二次成形用金型３１に一次成形品１６をセットした状態では、成形空間３２には、収容空間３３に収容された一次成形樹脂部１９の外面及び抜止めリブ３０が臨んでいる。食い切り部３４は、一次成形樹脂部１９の上下両端面（端子金具１４の端部１４Ａが突出する面）及び左右両側面に全周に亘って当接し、これにより、一次成形品１６の一次成形樹脂部１９の外面と成形空間３２（二次成形用金型３１の内面）とで囲まれるとともに端子収容凹部３５とは隔絶された形態の二次成形用キャビティ３６が形成される。そして、食い切り部３４が一次成形樹脂部１９の上下及び左右の各面に当接することにより、二次成形用キャビティ３６内に注入された溶融樹脂の収容空間３３内及び端子収容凹部３５内への漏出が規制される。また、端子収容凹部３５は、端子金具１４の端部１４Ａと整合する細長い孔状ではなく、複数の端子金具１４の端部をまとめて収容できるように左右方向に長い方形状をなしており、その端子収容凹部３５内の内壁面は端子金具１４の端部とは非接触となっている。
【００２２】
上記のように一次成形品１６を二次成形用金型３１にセットしたら、二次成形用キャビティ３６に二次成形樹脂部３７を成形するための溶融樹脂が注入される。注入された溶融樹脂は、二次成形用キャビティ３６から各逃がし孔２２，２３内に入り込み、さらに一次成形樹脂部１９の内面の盆状空間２８内に入り込む。この二次インサート成形により、二次成形樹脂部３７が成形されるとともに、その二次成形樹脂部３７と一次成形品１６の一次成形樹脂部１９とが一体化されたコネクタＡが得られる。尚、二次成形樹脂部３７から内側へ突出した一次成形樹脂部１９は角形突部１１を構成し、その角形突部１１の上下両面から端子金具１４の端部が突出した状態となる。
【００２３】
逃がし孔２２，２３内では、二次成形樹脂部３７がキャリア１５の切断によって分離された端子金具１４同士の間に介在してその端子金具１４同士の間を隔絶する（図１５を参照）。また、二次成形樹脂部３７に形成された係止部３８が逃がし孔２２，２３の係止部２４，２５に係止することにより、二次成形樹脂部３７が一次成形樹脂部１９から外側へ離脱することが防止される。尚、一次成形樹脂部１９の抜止めリブ３０が二次成形樹脂部３７の抜止め溝３９に係止することによっても、二次成形樹脂部３７が一次成形樹脂部１９から外側へ離脱することが防止される（図１５を参照）。さらに、第１の一次成形樹脂構成部２０の内面上に露出されていた端子金具１４は、二次成形樹脂部３７のうちの盆状空間２８に入り込んだ部分によって覆い隠されている（図１４を参照）。また、この盆状空間２８に入り込んだ二次成形樹脂部３７の内面は、一次成形樹脂部１９の枠部２７の内面に対して面一状に連続している。
【００２４】
上述のように本実施形態においては、樹脂成形部１０の外面における端子金具１４の端部１４Ａの突出領域、即ち樹脂成形部１０の上下両面が、一次成形樹脂部１９によって構成され、二次成形樹脂部３７と二次成形用キャビティ３６が、端子金具１４の突出領域とは別個の領域に配されるとともに、二次成形用金型３１の食い切り部３４が、樹脂成形部１０の上下両面における端子金具１４とは非接触の位置に当接されている。樹脂成形部１０の上下両面における食い切り部３４の当接領域は平坦面状であるから、食い切り部３４における樹脂成形部１０への当接部分も、平坦面状という簡素な形状とされており、食い切り部３４に端子金具１４の端部１４Ａを嵌入させための細い孔部を形成する必要はない。このように、本実施形態では、食い切り部の形状が複雑になることに起因して二次成形用金型の構造が複雑になる、ということが回避されている。また、端子金具１４の端部１４Ａには二次インサート成形時の成形圧力が作用しないので、変形する虞もない。
【００２５】
また、複数の端子金具１４はキャリア１５で連結された連鎖端子１３の形で一次インサート成形用金型にセットすることができるので、端子金具１４を個別にセットする場合に比べて作業性が良い。
しかも、キャリア１５の切断は逃がし孔２２，２３の内部で行われるので、キャリア１５の切断に伴って一次成形樹脂部１９の一部を除去する必要がなく、材料が無駄にならずに済む。
さらに、キャリア１５の切断によって分離された端子金具１４の間には、二次成形樹脂部３７が介在して、その端子金具１４間を隔絶するので、端子金具１４間を確実に絶縁することができる。
【００２６】
また、一次成形樹脂部１９は、その外面のうち逃がし孔２３の外側の端部が開口する面において二次成形樹脂部３７と結合された形態となっているが、逃がし孔２２，２３と二次成形樹脂部３７には互いに係止する係止部２４，２５，３８を設けたので、一次成形樹脂部１９と二次成形樹脂部３７との離脱が確実に規制されている。
また、一次成形品の一次成形樹脂部を単一部品として成形する場合には、複数本の端子金具を逃がし孔の貫通方向と同じ方向に重なるように配列しようとしても、逃がし孔を成形する上で端子金具が邪魔になるために金型を型開きすることができないのであるが、本実施形態では、一次インサート成形において端子金具１４と一次成形樹脂構成部２０，２１とを一体化させた形態の２つの一次成形構成品１７，１８を成形し、その一次成形構成品１７，１８を逃がし孔２２，２３の貫通方向と同じ方向に重ね合わせることによって一次成形品１６を構成しているため、１つの一次成形構成品１７，１８において、複数の端子金具１４を逃がし孔２２，２３の貫通方向に重なるように整列させずに済んでいる。したがって、一次成形樹脂構成部２０，２１に逃がし孔２２，２３を成形するに際して端子金具１４が邪魔になって型開きができなくなる、ということがない。
【００２７】
［他の実施形態］
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施態様も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。
【００２８】
（１）上記実施形態では一次成形品の逃がし孔に、二次成形樹脂部が係止される係止部を設けたが、本発明によれば、係止部は、一次成形樹脂部における逃がし孔以外の領域に設けてもよい。
【００２９】
（２）上記実施形態では複数の端子金具が逃がし孔の貫通方向に重なるように配列したが、本発明によれば、複数の端子金具が逃がし孔の貫通方向には重ならないように配列してもよい。この場合、一次成形品の一次成形樹脂構成部は単一の部品として成形することができる。
【図面の簡単な説明】
【図１】実施形態１の断面図
【図２】平面図
【図３】連鎖端子の正面図
【図４】第１の一次成形構成品の正面図
【図５】キャリアを切断した状態の第１の一次成形構成品の正面図
【図６】第１と第２の一次成形構成品の分離状態をあらわす平面図
【図７】第１と第２の一次成形構成品の分離状態をあらわす側面図
【図８】第１と第２の一次成形構成品の分離状態をあらわす縦断面図
【図９】第１と第２の一次成形構成品の分離状態をあらわす水平断面図
【図１０】第１と第２の一次成形構成品を組み付けて単一の一次成形品とした状態をあらわす縦断面図
【図１１】第１と第２の一次成形構成品を組み付けて単一の一次成形品とした状態をあらわす水平断面図
【図１２】一次成形品を二次成形用金型にセットした状態の縦断面図
【図１３】コネクタが製造された状態の縦断面図
【図１４】コネクタの部分拡大縦断面図
【図１５】コネクタの部分拡大水平断面図
【図１６】従来例の断面図
【符号の説明】
Ａ…コネクタ
１０…樹脂成形部
１３…連鎖端子
１４…端子金具
１４Ａ…端子金具の端部
１５…キャリア
１６…一次成形品
１７…第１の一次成形構成品
１８…第２の一次成形構成品
１９…一次成形樹脂部
２０，２１…一次成形樹脂構成部
２２，２３…逃がし孔
２４，２５…逃がし孔の係止部
３１…二次成形用金型
３４…食い切り部
３６…二次成形用キャビティ
３７…二次成形樹脂部
３８…二次成形樹脂部の係止部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connector produced by insert molding.
[0002]
[Prior art]
FIG. 16 shows a conventional connector in which the end portion of the terminal fitting protrudes from the outer surface of the resin molded portion. The connector 100 forms a primary molded product 101 in which the primary molded resin portion 102 and the terminal fitting 103 are integrated by primary insert molding, and the primary molded product 101 and the secondary molded resin portion 104 by secondary insert molding. By integrating, the end portion 103A of the terminal fitting 103 is projected from the outer surface of the resin molded portion 105.
[0003]
When the connector 100 is manufactured through the two-step insert molding as described above, the secondary molding die 106 is provided with a cut-off portion 107 that comes into contact with the outer surface of the primary molded product 101, and the cut-off portion 107 performs the primary molding. A secondary molding cavity 108 surrounded by the outer surface of the product 101 and the inner surface of the secondary molding die 106 is formed, and a molten resin is injected into the secondary molding cavity 108 to thereby form a secondary molding resin portion. 104 is formed.
[0004]
[Problems to be solved by the invention]
In the conventional connector 100, the protruding region of the terminal fitting 103 on the outer surface of the resin molding portion 105 is formed by the secondary molding resin portion 104, so that the terminal fitting 103 of the biting portion 107 of the secondary molding die 106 is formed. In the portion corresponding to the protruding region, the cutout portion 107 needs to be brought into contact with the terminal fitting 103. Then, a thin hole 109 for fitting the end portion 103A of the terminal fitting 103 must be formed in the cut-off portion 107, which makes the structure of the secondary molding die 106 complicated. There was a problem.
[0005]
A connector manufactured by insert molding is disclosed in Japanese Patent Laid-Open No. 63-211577.
The present invention has been made in view of the above circumstances, and aims to simplify the structure of a secondary molding die.
[0006]
[Means for Solving the Problems]
The invention of claim 1 is a form in which the end of the terminal fitting is protruded from the outer surface of the resin molded portion, and the primary molded product in which the primary molded resin portion and the terminal fitting are integrated by primary insert molding. In the primary insert molding, the plurality of terminal fittings are integrated with the primary resin molded portion in the form of a chain terminal connected by a carrier, and correspond to the carrier in the primary molded resin portion. In the secondary insert molding, in the state where the terminal metal pieces are separated by cutting the carrier in the escape hole, a cut-off portion provided in the secondary molding die is formed through the region. A secondary molding cavity is formed in contact with the outer surface of the primary molded product and surrounded by the outer surface of the primary molded product and the inner surface of the mold for secondary molding. In a connector manufactured by injecting molten resin into a bite to form a secondary molded resin portion and integrating the secondary molded resin portion and the primary molded product, the outer surface of the resin molded portion The protruding region at the end of the terminal fitting is constituted by the primary molding resin portion, and the terminal fitting separated by cutting the carrier is isolated by the secondary molding resin portion that has entered the escape hole. ing.
[0008]
The invention according to claim 2 is the invention according to claim 1 , wherein the primary molding resin portion is coupled to the secondary molding resin portion at a surface of the outer surface where one end of the escape hole opens, The relief hole and the secondary molding resin portion are provided with a locking portion that locks the primary molding resin portion and the secondary molding resin portion by locking each other.
The invention according to claim 3 is the connector according to claim 1 or 2 , wherein the plurality of terminal fittings are arranged so as to overlap in the same direction as the penetration direction of the escape hole. A plurality of primary molded components molded into a form in which the terminal metal fitting and the primary molded resin component are integrated by primary insert molding are overlapped in the same direction as the through-hole penetration direction. Yes.
[0010]
[Action and effect of the invention]
[Invention of Claim 1 ]
Since the projecting area of the end of the terminal fitting on the outer surface of the resin molding part is configured by the primary molding resin part, the secondary molding resin part and the secondary molding cavity are arranged in an area separate from the projecting area of the terminal fitting. Accordingly, the cut-out portion of the secondary molding die is also arranged at a position that is not in contact with the terminal fitting. Therefore, it is not necessary to form a narrow hole for fitting the end of the terminal fitting in the cut-off portion, and the structure of the secondary molding die is not complicated.
[0011]
Further, since the plurality of terminal fittings can be set in the primary insert molding die in the form of a chain terminal connected by a carrier, the workability is better than when the terminal fittings are individually set. Further, since the carrier is cut inside the escape hole, it is not necessary to remove a part of the primary molding resin portion along with the cutting of the carrier, and the material is not wasted. Further, since the secondary molded resin portion is interposed between the terminal fittings separated by the cutting of the carrier to isolate the terminal fittings, the terminal fittings can be reliably insulated.
[0012]
[Invention of claim 2 ]
Since the relief hole and the secondary molding resin portion are provided with a locking portion that latches with each other, the primary molding resin portion is the secondary molding resin on the surface of the outer surface where one end of the relief hole opens. Even if it is the form couple | bonded with the part, detachment | leave with a primary molding resin part and a secondary molding resin part can be controlled reliably.
[Invention of claim 3 ]
When molding the primary molded resin part of the primary molded product as a single part, even if you try to arrange multiple terminal fittings so that they overlap in the same direction as the escape hole penetration direction, the terminal will be used for molding the relief hole. The mold cannot be opened because the bracket is in the way.
[0013]
In that respect, in the present invention, in the primary insert molding, a plurality of primary molded components in which the terminal metal fitting and the primary molded resin component are integrated are molded, and the primary molded components are released in the same direction as the escape hole penetration direction. Since the primary molded product is configured by superimposing, it is not necessary to align the plurality of terminal fittings so as to overlap in the escape direction of the escape hole in one primary molded component. Therefore, the terminal metal fitting does not get in the way when the relief hole is formed in the primary molding resin component, and the mold cannot be opened.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
[Embodiment 1]
A first embodiment of the present invention will be described below with reference to FIGS.
The connector A according to the present embodiment includes a resin molded portion 10 having a rectangular tube shape with both upper and lower ends open, and a plurality of terminals penetrating vertically through a rectangular protrusion 11 formed on the inner wall surface of the resin molded portion 10. The metal fitting 14 is integrated by insert molding. The connector A is manufactured by primary insert molding in which the chain terminal 13 formed by connecting a plurality of terminal fittings 14 elongated in the vertical direction with a carrier 15 and the primary molded resin constituent parts 20 and 21 are integrated. Two primary molded components 17 and 18 are manufactured, the carrier 15 is cut in each primary molded component 17 and 18, the terminal fittings 14 are separated from each other, and the two primary molded components 17 and 18 that have been cut in the carrier are The steps are performed by assembling and assembling a single primary molded product 16 and integrating the primary molded product 16 and the secondary molded resin portion 37 by secondary insert molding.
[0015]
Hereinafter, the manufacturing process will be described in detail. The description will be made with respect to the rectangular protrusion 11 located on the left side in FIGS. 1 and 2, but the insert protrusion method for the rectangular protrusion 12 located on the upper side in FIG. Since is the same, description thereof is omitted. Further, in the following description, FIGS. 3 to 5 are used as a reference for the left and right direction, and the right side in FIGS. 1 and 6 to 15 is the inside for the inside and outside.
[0016]
Now, as shown in FIG. 3 and FIG. 4, the chain terminal 13 has a plurality of terminal fittings 14 arranged in parallel at a constant pitch, and the adjacent terminal fittings 14 connected to each other by carriers 15 at two upper and lower positions. The two chain terminals 13 are used for the square protrusion 11. In primary insert molding, two primary molding dies (not shown) having different shapes are used, and one chain terminal 13 is set in each primary molding die, and the primary molding resin component 20 is formed. , 21 and the chain terminal 13 are obtained as first and second primary molded components 17 and 18 (see FIGS. 6 to 9).
[0017]
As shown in FIG. 4 to FIG. 9, the first primary molded component 17 exposes the chain terminals 13 on the inner surface of the primary molded resin component 20 that forms a square thick plate as a whole, The upper and lower end portions 14A of each terminal fitting 14 are projected both upward and downward from the primary molded resin constituent portion 20, and further, a plurality of portions corresponding to the respective carriers 15 in the primary molded resin constituent portion 20 are penetrated between the inner and outer surfaces. A hole 22 is formed. A pair of upper and lower engaging portions 24 are formed at the inner end of the inner wall of each escape hole 22 in a stepped shape. In addition, the primary molded resin component 20 is formed with a pair of upper and lower fitting grooves 26 that are notched from both the left and right side surfaces to the outer surface. Furthermore, the inner surface of the primary molding resin component 20 is formed with a projecting frame portion 27 that extends along the peripheral edge and extends over all sides of the upper, lower, left, and right sides. A space surrounded by the frame portion 27 is A basin-like space 28 communicating with the escape hole 22 is formed.
[0018]
As shown in FIGS. 6 to 9, the second primary molded component 18 is formed on the inner surface of the primary molded resin component 21 that is square as a whole and has a thicker plate shape than the first primary molded component 17. The chain terminal 13 is exposed to be flush with the upper and lower end portions 14A of each terminal fitting 14 so as to project both upward and downward from the primary molded resin component 21 and further correspond to each carrier 15 in the primary molded resin component 21. A relief hole 23 is formed in such a manner that a plurality of locations are penetrated between the inner and outer surfaces. At the inner end of the inner wall of each escape hole 23, a pair of upper and lower engaging portions 25 are formed in a stepped shape. The primary molded resin component 21 is formed with a pair of upper and lower fitting ribs 29 protruding inward along the left and right side surfaces on the inner surface. Furthermore, retaining ribs 30 projecting in the left-right direction are formed on the outer edges of the left and right side surfaces of the primary molded resin component 21.
[0019]
Next, in the two primary molding components 17 and 18 molded as described above, each carrier 15 is cut. The cutting is performed by causing a cutter (not shown) to enter the escape holes 22 and 23, and the adjacent terminal fittings 14 are separated by cutting the carrier 15 (see FIG. 5).
Thereafter, the first primary molded component 17 and the second primary molded component 18 after the cutting of the carrier 15 are arranged so that the outer surface and the inner surface are in close contact with each other in the direction in which the escape holes 22 and 23 pass through. Can be assembled in the same direction. At the time of assembly, the fitting groove 26 and the fitting rib 29 are fitted to each other so that the primary molding resin constituent parts 20 and 21 are integrated to form the primary molding resin part 19. One primary molded product 16 is obtained (see FIGS. 10 and 11). In the assembled primary molded product 16, the terminal fitting 14 of the first primary molded component 17 and the terminal fixture 14 of the second primary molded component 18 are parallel to each other, and pass through the escape holes 22 and 23. A configuration in which the first primary molded component 17 and the second primary molded component 18 are in communication with each other in the relief holes 22 and 23 while being arranged in the same direction as the direction (left and right direction in FIG. 10). It has become. Moreover, the terminal metal fitting 14 exposed on the inner surface of the second primary molded resin constituent part 21 is in a state of being covered with the first primary molded resin constituent part 20.
[0020]
The primary molded product 16 is set in a pair of upper and lower secondary molding dies 31 (see FIG. 12). In the secondary molding die 31, a molding space 32 having a rectangular frame shape for molding the secondary molding resin portion 37 and an accommodation space 33 for accommodating the primary molding resin portion 19 of the primary molded product 16 in a non-movable manner. A terminal cutout portion 34 that contacts the outer surface of the primary molded product 16, and a terminal receiving recess that collectively stores the end portions 14 </ b> A of the plurality of terminal fittings 14 protruding from the upper and lower surfaces of the primary molded resin portion 19 of the primary molded product 16. 35 is formed.
[0021]
In a state where the primary molded product 16 is set in the secondary molding die 31, the outer surface of the primary molding resin portion 19 accommodated in the accommodation space 33 and the retaining rib 30 face the molding space 32. The cut-out portion 34 is in contact with the entire upper and lower end surfaces (the surface from which the end portion 14A of the terminal fitting 14 protrudes) and the left and right side surfaces of the primary molding resin portion 19 over the entire circumference. A secondary molding cavity 36 is formed that is surrounded by the outer surface of the resin portion 19 and the molding space 32 (the inner surface of the secondary molding die 31) and is isolated from the terminal receiving recess 35. The cut-out portion 34 abuts on the upper, lower, left and right surfaces of the primary molding resin portion 19, so that the molten resin injected into the secondary molding cavity 36 enters the accommodation space 33 and the terminal accommodation recess 35. Leakage is regulated. The terminal receiving recess 35 is not a long and narrow hole aligned with the end 14A of the terminal fitting 14, but has a rectangular shape that is long in the left-right direction so that the ends of the plurality of terminal fittings 14 can be accommodated together. The inner wall surface in the terminal accommodating recess 35 is not in contact with the end of the terminal fitting 14.
[0022]
When the primary molded product 16 is set in the secondary molding die 31 as described above, molten resin for molding the secondary molding resin portion 37 is injected into the secondary molding cavity 36. The injected molten resin enters the escape holes 22 and 23 from the secondary molding cavity 36, and further enters the basin space 28 on the inner surface of the primary molding resin portion 19. By this secondary insert molding, the secondary molded resin portion 37 is molded, and the connector A in which the secondary molded resin portion 37 and the primary molded resin portion 19 of the primary molded product 16 are integrated is obtained. The primary molded resin portion 19 protruding inward from the secondary molded resin portion 37 constitutes the rectangular protrusion 11, and the end portions of the terminal fitting 14 protrude from the upper and lower surfaces of the rectangular protrusion 11.
[0023]
In the escape holes 22, 23, the secondary molded resin portion 37 is interposed between the terminal fittings 14 separated by cutting the carrier 15 to isolate the terminal fittings 14 (see FIG. 15). In addition, the engaging portion 38 formed on the secondary molded resin portion 37 is engaged with the engaging portions 24 and 25 of the relief holes 22 and 23, so that the secondary molded resin portion 37 is outside the primary molded resin portion 19. It is prevented from leaving. The secondary molded resin portion 37 can be detached from the primary molded resin portion 19 also when the retaining rib 30 of the primary molded resin portion 19 is engaged with the retaining groove 39 of the secondary molded resin portion 37. Is prevented (see FIG. 15). Furthermore, the terminal metal fitting 14 exposed on the inner surface of the first primary molding resin component 20 is covered and hidden by the portion of the secondary molding resin portion 37 that has entered the basin-shaped space 28 (FIG. 14). See). Further, the inner surface of the secondary molding resin portion 37 that has entered the basin-like space 28 is continuous with the inner surface of the frame portion 27 of the primary molding resin portion 19 in a flush manner.
[0024]
As described above, in the present embodiment, the protruding region of the end portion 14A of the terminal fitting 14 on the outer surface of the resin molded portion 10, that is, the upper and lower surfaces of the resin molded portion 10 are constituted by the primary molded resin portion 19, and the secondary molding is performed. The resin portion 37 and the secondary molding cavity 36 are disposed in a region separate from the protruding region of the terminal fitting 14, and the cut-out portions 34 of the secondary molding die 31 are provided on both upper and lower surfaces of the resin molded portion 10. The terminal fitting 14 is in contact with a non-contact position. Since the contact area of the cutout portion 34 on both the upper and lower surfaces of the resin molded portion 10 is a flat surface, the contact portion of the cutout portion 34 with the resin molded portion 10 is also a simple shape called a flat surface. It is not necessary to form a narrow hole for fitting the end portion 14A of the terminal fitting 14 into the cutout portion 34. Thus, in the present embodiment, it is avoided that the structure of the secondary molding die is complicated due to the complicated shape of the cut-off portion. Further, since the molding pressure at the time of secondary insert molding does not act on the end portion 14A of the terminal fitting 14, there is no possibility of deformation.
[0025]
Further, since the plurality of terminal fittings 14 can be set in the primary insert molding die in the form of a chain terminal 13 connected by the carrier 15, workability is better than when the terminal fittings 14 are individually set. .
In addition, since the cutting of the carrier 15 is performed inside the escape holes 22 and 23, it is not necessary to remove a part of the primary molding resin portion 19 along with the cutting of the carrier 15, and the material is not wasted.
Further, since the secondary molding resin portion 37 is interposed between the terminal fittings 14 separated by cutting the carrier 15, and the terminal fittings 14 are isolated from each other, the terminal fittings 14 can be reliably insulated. it can.
[0026]
In addition, the primary molding resin portion 19 is connected to the secondary molding resin portion 37 on the surface of the outer surface where the outer end of the escape hole 23 opens. Since the locking portions 24, 25, and 38 that lock each other are provided in the next molding resin portion 37, the separation between the primary molding resin portion 19 and the secondary molding resin portion 37 is reliably restricted.
In addition, when the primary molded resin portion of the primary molded product is molded as a single part, even if an attempt is made to arrange a plurality of terminal fittings so as to overlap in the same direction as the direction of penetration of the relief holes, However, in this embodiment, the terminal fitting 14 and the primary molded resin constituent parts 20 and 21 are integrated in the primary insert molding in this embodiment. Are formed, and the primary molded product 16 is formed by superimposing the primary molded components 17 and 18 in the same direction as the through-holes 22 and 23, In one primary molded component 17, 18, it is not necessary to align the plurality of terminal fittings 14 so as to overlap with the escape direction of the escape holes 22, 23. Therefore, when the relief holes 22 and 23 are formed in the primary molding resin components 20 and 21, the terminal fitting 14 does not obstruct the mold opening.
[0027]
[Other Embodiments]
The present invention is not limited to the embodiment described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made .
[0028]
(1 ) In the above embodiment, the locking portion for locking the secondary molded resin portion is provided in the relief hole of the primary molded product. However, according to the present invention, the locking portion is a relief in the primary molded resin portion. You may provide in area | regions other than a hole.
[0029]
( 2 ) In the above embodiment, the plurality of terminal fittings are arranged so as to overlap in the penetration direction of the escape hole. However, according to the present invention, the plurality of terminal fittings are arranged so as not to overlap in the penetration direction of the relief hole. Also good. In this case, the primary molded resin component of the primary molded product can be molded as a single part.
[Brief description of the drawings]
1 is a cross-sectional view of Embodiment 1. FIG. 2 is a plan view. FIG. 3 is a front view of a chain terminal. FIG. 4 is a front view of a first primary molded component. FIG. 6 is a plan view showing the separated state of the first and second primary molded components. FIG. 7 is a side view showing the separated state of the first and second primary molded components. FIG. 8 is a longitudinal sectional view showing the separated state of the first and second primary molded components. FIG. 9 is a horizontal sectional view showing the separated state of the first and second primary molded components. FIG. 11 is a longitudinal sectional view showing a state in which the first and second primary molded components are assembled into a single primary molded product. FIG. 11 shows a single primary molded product assembled with the first and second primary molded components. Fig. 12 is a horizontal cross-sectional view showing a state where the primary molded product is set. Fig. 13 is a vertical cross-sectional view of a state where the primary molded product is set in a secondary molding die. Longitudinal sectional view of a state in which Kuta is produced [14] partially enlarged longitudinal sectional view of the connector Figure 15 connector partially enlarged horizontal cross-sectional view of FIG. 16 is a cross-sectional view of a conventional example [Description of symbols]
A ... Connector 10 ... Resin molding part 13 ... Chain terminal 14 ... Terminal metal fitting 14A ... End of terminal metal fitting 15 ... Carrier 16 ... Primary molded product 17 ... First primary molded component 18 ... Second primary molded component 19 ... primary molding resin parts 20 and 21 ... primary molding resin constituent parts 22 and 23 ... relief holes 24 and 25 ... locking part 31 of the relief hole ... secondary molding die 34 ... cut-off part 36 ... secondary molding cavity 37 ... Secondary molding resin part 38 ... Locking part of secondary molding resin part

Claims

The end of the terminal fitting protrudes from the outer surface of the resin molded part,
A primary molded product in which a primary molded resin portion and the terminal fitting are integrated by primary insert molding , and in the primary insert molding, the primary in the form of a chain terminal in which a plurality of the terminal fittings are connected by a carrier. While being integrated with the resin molding part, an escape hole is formed through the region corresponding to the carrier in the primary molding resin part,
In secondary insert molding, in a state where the terminal fittings are separated from each other by cutting the carrier in the escape hole, the cut-out portion provided in the secondary molding die is brought into contact with the outer surface of the primary molded product. A secondary molding cavity is formed that is surrounded by the outer surface of the primary molded product and the inner surface of the secondary molding die, and the molten resin is injected into the secondary molding cavity to thereby form the secondary molding resin portion. In the connector manufactured by integrating the secondary molded resin part and the primary molded product while molding,
The protruding region of the end of the terminal fitting on the outer surface of the resin molded portion is constituted by the primary molding resin portion, and the space between the terminal fittings separated by cutting the carrier has entered the escape hole. A connector characterized by being isolated by a secondary molded resin part .

The primary molding resin part is combined with the secondary molding resin part in a surface where one end of the escape hole opens out of its outer surface,
The relief hole and the secondary molding resin portion are provided with a locking portion that locks the primary molding resin portion and the secondary molding resin portion by locking each other. The connector according to claim 1 .

In the connector in which a plurality of the terminal fittings are arranged so as to overlap in the same direction as the through direction of the escape hole,
A plurality of primary molded components molded into a form in which the terminal fitting and the primary molded resin component are integrated by primary insert molding in the same direction as the through-holes of the escape holes. the connector according to claim 1 or claim 2, characterized in that it is constituted by.