JP2004047376A

JP2004047376A - Contact unit

Info

Publication number: JP2004047376A
Application number: JP2002206024A
Authority: JP
Inventors: Tsuyoshi Watanabe; 渡邊　強
Original assignee: Enplas Corp
Current assignee: Enplas Corp
Priority date: 2002-07-15
Filing date: 2002-07-15
Publication date: 2004-02-12

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contact unit that is so structured as to secure stable electrical connection by bringing a connection object into press contact with a contact housed in a hole part provided with a conductive member in its inside surface and projecting by being biased outward by an elastic member to bend the elastic member, and by bringing the contact into contact with the conductive meber at a certain position. <P>SOLUTION: This contact unit 11 is used for electrically connecting two connection objects to each other by a connection means 13 housed in the hole part 23 formed in at least one surface of an insulating member 22. The connection member 13 is provided with: the contacts 24 brought into press contact with at least one of the connection objects to electrically contact it; the conductive member 27 formed in the inside surface of the hole part 23 and electrically connected to the other connection object; and the elastic member 25 for biasing the contact 24 outward to project a part thereof from the hole part 23, and deformed by pressure to the contact 24. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、対向する被接続物を電気的に接続させるためのコンタクトユニットに関し、詳しくは、内周面に導電部材を備えた穴部に収納され、弾性部材により外方に付勢されて突出する接触子に被接続物を圧接して弾性部材を屈曲させ、接触子を導電部材に対して一定位置で接触させて安定な電気的接続を確保しようとするコンタクトユニットに係るものである。
【０００２】
【従来の技術】
従来この種のコンタクトユニットには、例えば、特開平１１−２９７４３９号公報に開示されているような、電気部品の性能試験に用いられる電気部品用ソケットに適用されたものがある。このコンタクトユニットは、図９に要部を拡大して示すように、図示省略のフレームの底部に備えられたガイド板１に複数の貫通孔２を回路基板３の各接点電極４に対向して形成し、貫通孔２の内周面に導電膜５を形成すると共に、貫通孔２にコイル状接点６を具備して、電気部品７の底面に配列形成された半田ボールからなる接続端子部８と回路基板３の接点電極４とのコンタクトをとるようにしたものである。
【０００３】
このコンタクトユニットにおいては、コイル状接点６を上下両方向から回路基板３及び電気部品７で押圧するとコイル状接点６が圧縮されて屈曲し、コイル状接点６が貫通孔２の内周面に形成された導電膜５と点Ｐ１，Ｐ２，Ｐ３で接触する。この場合、Ｐ１，Ｐ３間が導電膜５によって短絡され電気部品７の接続端子部８と回路基板３の接点電極４間の接続抵抗値が減少し、インダクタンスも減少する。
【０００４】
【発明が解決しようとする課題】
しかし、このような従来のコンタクトユニットにおいては、コイル状接点６の屈曲状態は、図９に示したものに限られず、例えば図１０に示すように、コイル状接点６の点Ｐ１，Ｐ２が導電膜５と接触するように屈曲する場合もある。この場合は、Ｐ１，Ｐ２間が導電膜５によって短絡し、接続抵抗値が減少する。ただし、図９における接続抵抗値よりも大きい。
【０００５】
また、図１１に示すように、コイル状接点６が点Ｐ１においてのみ導電膜５と接触するように屈曲する場合もあり得る。この場合は、接続抵抗値及びインダクタンスは、コイル状接点６自身の固有の抵抗値及びインダクタンスとなるため、その値は上記図９及び図１０の場合よりも大きいものとなる。
【０００６】
このように、従来のコンタクトユニットによれば、コイル状接点６の屈曲状態が一定せず、電気部品７の複数の接続端子部８と回路基板３の接点電極４間の接続抵抗値がばらつき、電気部品７の性能試験を安定して行うことができなかった。特に、このような接続抵抗値及びインダクタンスのばらつきは、電気的接続が不安定となり、高周波用電気部品の性能試験の信頼性を欠くおそれもある。
【０００７】
そこで、本発明は、このような問題点に対処し、内周面に導電部材を備えた穴部に収納され、弾性部材により外方に付勢されて突出する接触子に被接続物を圧接して弾性部材を屈曲させ、接触子を導電部材に対して一定位置で接触させて安定な電気的接続を確保しようとするコンタクトユニットを提供することを目的とする。
【０００８】
【課題を解決するための手段】
上記目的を達成するために、本発明によるコンタクトユニットは、絶縁部材の少なくとも一面に形成した穴部に収納された接続手段により、二つの被接続物を電気的に接続させるものであって、上記接続手段は、上記二つの被接続物のうち、少なくとも一方の被接続物に圧接して電気的に接触する接触子と、上記穴部の内周面に設けられ他方の被接続物と電気的に接続する導電部材と、上記接触子を外方に付勢してその一部を該穴部から突出させると共に上記接触子への押圧で変形する弾性部材と、を備えたものである。
【０００９】
このような構成により、絶縁物の少なくとも一面に設けられた穴部に収納され、弾性部材で外方に付勢されて穴部から突出する接触子を、二つの被接続物のうち、少なくとも一方の被接続物で押圧し、弾性部材を屈曲させ、接触子を穴部の内周面に設けられ他方の被接続物と電気的に接続する導電部材に接触させ、二つの被接続物を電気的に接続する。これにより、接触子を穴部の内周面に設けられた導電部材に確実に接触させて両被接続物間の接続抵抗値のばらつきを低下させ、安定な電気的接続を確保する。
【００１０】
また、上記穴部は、上記絶縁物を貫通して形成されたスルーホールである。
そして、上記接続手段は、上記スルーホールの内部に配置された弾性部材でその両端部に位置する一対の接触子を外方に付勢し、上記スルーホールの両端部からその一部を外方に突出させたものである。
これにより、一対の接触子を対向する二つの被接続物で両側方から押圧してスルーホール内に押し込み、弾性部材を屈曲させ、一対の接触子をスルーホールの内周面に設けた導電部材に接触させて二つの被接続物を電気的に接続する。
【００１１】
さらに、上記穴部は、上記二つの被接続物のうち、少なくとも一方の被接続物が備える複数の接続端子部または接点電極に対応して複数形成され、夫々に上記接続手段を収納したものである。これにより、被接続物が備える複数の接続端子部または接点電極を、該接続端子部または接点電極に対応して形成された複数の穴部に収納された複数の接続手段と接触させ、二つの被接続物を接続する。
【００１２】
また、上記複数の接続手段は、多層配線基板の少なくとも一面に設けられたものであり、上記複数の接続手段の穴部に備える導電部材と、互いに電気的に対応する被接続物の接続端子部若しくは接点電極または別個独立して離れて設けた他の穴部の導電部材と、を上記多層配線基板の各層に形成された配線路により接続したものである。これにより、二つの被接続物のうち、一方の被接続物の接続端子部の配列ピッチに対して他方の被接続物の接点電極の配列ピッチを広く形成することを可能にする。
【００１３】
そして、上記接続手段は、上記穴部の開放端部に上記穴部内に収納された接触子を保持する脱落防止部材を備えたものである。これにより、脱落防止部材で穴部に収納された接触子を穴部の開放端部から脱落するのを防止する。
【００１４】
【発明の実施の形態】
以下、本発明の実施の形態を添付図面に基づいて詳細に説明する。
図１は本発明によるコンタクトユニットの第１の実施形態を説明する断面図であり、図２はこのコンタクトユニットを適用した電気部品用ソケットを示す断面図である。この電気部品用ソケットは、ＰＧＡ（Ｐｉｎ　Ｇｒｉｄ　Ａｒｒａｙ）型やＢＧＡ型等の電気部品と回路基板とを電気的に接続するものであり、電気部品を着脱自在に保持し、電気部品の初期不良を取り除くバーンインテスト等に使用されるもので、ソケット本体部９と、ソケットカバー１０と、コンタクトユニット１１を備えている。
【００１５】
ソケット本体部９は、電気部品７を位置決めして保持するものであり、載置部１２と、押圧部材２０とを備えている。
載置部１２は、電気部品７を位置決めして載置するもので、ソケット本体部９の上面中央部に形成されている。具体的には、ソケット本体部９の上面内側に形成された凹陥部１４に図示省略の弦巻ばねで常時上向きに付勢されて上下動可能に設けられたフローティングプレート１５の上面を載置部１２としている。このフローティングプレート１５の面内には、電気部品７の接続端子部に対応する各位置に、後述のコンタクトユニット１１の接触子２４を受け入れるピン導入孔が穿設されている。なお、載置部１２の構造としては、上述のフローティング方式に限られず、固定式のものであってもよい。
【００１６】
載置部１２の上方にて両側方には、押圧部材２０が設けられている。この押圧部材２０は、電気部品７を上方から押圧するものであり、枢軸ピン１７でソケット本体部９に回動自在に軸支されており、その外側端部１８は、後述のソケットカバー１０に設けられた軸１９に当接して、軸１９の上下動に伴って、押圧部材２０が枢軸ピン１７を中心に回動できる形状に形成されている。そして、押圧部材２０の起立状態において、電気部品７の上面に当接する内側端部には、押圧部２１を備えている。
【００１７】
また、ソケット本体部９の上面には、ソケットカバー１０が設けられている。このソケットカバー１０は、押圧部材２０を起立状態に付勢して電気部品７を保持するものであり、その隅部には貫通孔３３を備え、この貫通孔３３には頭部に抜け防止部３４を形成し他端部をソケット本体部９に固定した支持部材３５が挿通されて設けられている。また、ソケットカバー１０の内側には、軸１９が設けられている。この軸１９は、押圧部材２０の外側端部１８に当接して、上下動を押圧部材２０の回動動作に変換する作用をなすものである。さらに、支持部材３５には、弦巻ばね３２が装着されている。この弦巻ばね３２は、ソケットカバー１０を常時上方に付勢するものであり、これによって押圧部材２０を常時起立状態に維持して電気部品７を保持している。
【００１８】
また、ソケット本体部９の載置部１２の下方には、コンタクトユニット１１が設けられている。このコンタクトユニット１１は、二つの被接続物としての回路基板３と電気部品７とを電気的に接続させるものであり、図１に示すように、絶縁部材２２と、穴部２３と、接続手段１３と、脱落防止部材２６とで構成されている。
【００１９】
絶縁部材２２は、例えば、ガラスまたはセラミック等であり、絶縁部材２２の少なくとも一面には、穴部２３が設けられている。穴部２３は、接続手段１３を保持するものであり、その内壁面は、研磨等により滑らかに形成されている。具体的には、穴部２３は、絶縁物２２を貫通して形成されたスルーホール２３ａであり、回路基板３及び電気部品７の複数の接続端子部及び接点電極に対応して複数形成されている。なお、絶縁部材２２は、ガラス繊維入りエポキシ樹脂や公知の絶縁樹脂材料等でもよい。
【００２０】
そして、複数の穴部２３には、夫々接続手段１３が備えられている。この接続手段１３は、回路基板３の接点電極と電気部品の接続端子部とを接続するものであり、接触子２４と、導電部材２７と、弾性部材２５とを備えている。
【００２１】
接続手段１３の両端部には、一対の接触子２４が設けられている。この接触子２４は、電気部品７の接続端子部及び回路基板３の接点電極に圧接して電気的に接触するものであり、電気部品７の接続端子部と接触する第１コンタクトピン２８と、回路基板３の接点電極と接触する第２コンタクトピン２９からなる。そして、共に、スルーホール２３ａ内にある基部２４ａよりも絶縁部材２２の外方に突出するピン状接点２４ｂを細くし、例えば、真鍮等の導電部材で形成されている。なお、第１及び第２コンタクトピン２８，２９の少なくとも基部２４ａの表面には、例えば、ニッケル（Ｎｉ）を下地に中間層としての潤滑めっき処理が施され、最上面に金（Ａｕ）によるめっき処理がされていてもよい。
【００２２】
ここで、第１コンタクトピン２８の接触端面は、例えば図３に示すように、（ａ）円錐凹型、（ｂ）円錐凸型をなしている。同図（ａ）に示す円錐凹型は、ＢＧＡ型電気部品のボール状接続端子部を受け入れるのに好適であり、同図（ｂ）に示す円錐凸型は、ＰＧＡ型電気部品のピン状接続端子部との安定した接触を確保するのに好適である。なお、接触端面形状は、図３に示すものに限らず、例えば平坦面またはクラウン型等であってもよい。
【００２３】
穴部２３の内周面には導電部材２７が設けられている。この導電部材２７は、一対の接触子２４と接触し両者間を電気的に短絡させるものであり、例えば銅（Ｃｕ）−ニッケル（Ｎｉ）−金（Ａｕ）のめっき膜である。また、ニッケル（Ｎｉ）を下地に中間層としての潤滑めっき処理が施され最上面に金（Ａｕ）によるめっき処理がされてもよい。この場合、潤滑めっきは、例えば、Ｎｉを８３％、リン（Ｐ）を９％、テフロン（ＰＴＦＥ：登録商標）を８％含有するものであり、０．２μｍ〜０．３μｍの厚みで形成される。これにより、上述の表面に潤滑めっきを施した接触子２４との接触が滑らかとなり、不活性ガス雰囲気中での試験においても、接触子２４が導電部材２７と密着して動かなくなるのを防止することができる。なお、導電部材２７は、薄膜形成されたものに限らず、スルーホール２３ａに金属パイプを圧入したものであってもよい。
【００２４】
また、第１及び第２コンタクトピン２８，２９の間には、弾性部材２５が挿入されている。この弾性部材２５は、第１及び第２コンタクトピン２８，２９を外方に付勢してその一部をスルーホール２３ａの両端部から突出させると共に、第１及び第２コンタクトピン２８，２９が内方へ押し込まれる際に、屈曲するようにしたものであり、例えば弦巻ばねである。そして、この弾性部材２５の両端部は、接触子２４の基部２４ａの端面に対して、例えばリング状等均等に当接されるのではなく、接触子２４の中心線からはずれた部位の一箇所に当接されている。これにより、接触子２４（第１及び第２コンタクトピン２８，２９）には、内方へ押し込まれる際に回転する力が作用する。なお、弾性部材２５は、導電材料または絶縁材料のいずれで形成されてもよく、また、弦巻ばねに限定されず、スポンジやその他伸縮自在な弾性機能を有するものであればいかなるものであってもよい。
【００２５】
そして、スルーホール２３ａの両端部には、脱落防止部材２６が設けられている。この脱落防止部材２６は、スルーホール２３ａの開放端部にスルーホール２３ａ内に収納された第１及び第２コンタクトピン２８，２９を保持して抜け落ちるのを防止するものであり、具体的には、第１及び第２コンタクトピン２８，２９の基部２４ａの外形よりも小さくて、ピン状接点２４ｂの外形よりも大きい貫通する孔部３０を有し、この孔部３０にピン状接点２４ｂを挿通させて、スルーホール２３ａの両端部を塞いで設けられている。
【００２６】
図４は、接触子２４の他の形状を示したものである。同図（ａ）は、基部２４ａ及びピン状接点２４ｂの中心線が互いに平行方向にずれて形成されているものである。これによれば、弾性部材２５がその圧縮復元力により基部２４ａを上方に押圧する力の平均作用点ａと、電気部品７の接続端子部８がピン状接点２４ｂを下方に押圧する力の作用点ｂが同図に示す左右方向にずれており、しかもその力の方向が互いに逆方向であるため、接触子２４の基部２４ａは矢印Ｒ方向に回動し、点Ｑ１が図１に示すスルーホール２３ａ内周面に形成された導電部材２７と接触することになる。
【００２７】
また、図４（ｂ）は、基部２４ａ及びピン状接点２４ｂの中心線が互いに交差方向にずれて形成されているものである。これによれば、弾性部材２５がその圧縮復元力により基部２４ａを上方に押圧する力の平均作用点ａと、電気部品７の接続端子部がピン状接点２４ｂを下方に押圧する力の作用点ｂが同図に示す左右方向にずれており、しかもその力の方向が互いに逆方向であるため、接触子２４の基部２４ａは矢印Ｒ方向に回動し、点Ｑ１が図２に示すスルーホール２３ａ内周面の導電部材２７と接触することになる。
【００２８】
さらに、図４（ｃ）は、基部２４ａの内側端面が基部２４ａの中心線に対して傾斜して形成されているものである。これによれば、弾性部材２５がその圧縮復元力により接触子２４の基部２４ａを上方に押圧する力の平均作用点ａは、電気部品７の接続端子部がピン状接点２４ｂを下方に押圧する力の作用点ｂと垂直方向に一致している。しかし、弾性部材２５が基部２４ａを押圧する方向は、同図に示す右斜め上方であるため基部２４ａが矢印Ｒ方向に移動し、点Ｑ１が図１に示すスルーホール２３ａ内周面の導電部材２７と接触することになる。
【００２９】
上記いずれの場合も、弾性部材２５の屈曲を一定方向に確実に生じさせることができ、接触子２４とスルーホール２３ａ内周面の導電部材２７との安定した接触を確保することができ、電気部品７の複数の接続端子部と回路基板３の接点電極間の接続抵抗値のばらつきを抑制することができる。
【００３０】
次に、このように構成されたコンタクトユニット１１を適用した電気部品用ソケットの動作について説明する。
先ず、図２に示すように、電気部品用ソケットは、コンタクトユニット１１の第２コンタクトピン２９を回路基板３の接点電極４に位置決めされて、回路基板３上に押圧して固定される。次に、図５に示すように、電気部品用ソケットのソケットカバー１０が、外力によって、弦巻ばね３２の付勢力に抗して下方に押し下げられる。このとき、ソケットカバー１０の内側面に備える軸１８が下がるに伴って、押圧部材２０がその外側端部１８で軸１９上に摺接し、枢軸ピン１７を中心に回動して外方に倒れ、載置部１２上方を電気部品７が挿入できる状態に開放する。
【００３１】
次に、載置部１２に電気部品７が載置される。このとき、電気部品７は、その外周縁部を載置部１２の四隅部に設けられた位置決め部で規制されて、その下面に複数配列された接続端子部８がフローティングプレート１５のピン導入孔１６に対して位置決めされる。その後、ソケットカバー１０への押圧が除かれる。そうすると、弦巻ばね３２の圧縮反力よってソケットカバー１０が上方に押し上げられ、それに伴って軸１９が上昇し、押圧部材２０の外側端部１８が上方に押し上げられ、押圧部材２０が枢軸ピン１７を中心に回動して起立状態になる。このとき、図２に示すように、押圧部材２０の押圧部２１が電気部品７の上面に当接して、電気部品７を下方に押圧することになる。
【００３２】
この場合、図６に示すように、電気部品７は、押圧部材２０による押圧に伴って、接続端子部８をピン導入孔１６に導入した状態でフローティングプレート１５を下方に押し下げる。そうすると、接続端子部８は、ピン導入孔１６に導入されているコンタクトユニット１１の第１コンタクトピン２８と接触して、さらにこれを押し下げることになる。
【００３３】
その結果、第１及び第２コンタクトピン２８，２９は、電気部品７の接続端子部８及び回路基板３の接点電極４により上下方向から押圧されるため、共にスルーホール２３ａ内に押し込まれる。そして、第１及び第２コンタクトピン２８，２９は、弾性部材２５が圧縮されて屈曲することにより直立状態から僅かに倒れスルーホール２３ａの内周面に形成された導電部材２７と基部２４ａの点Ｑ１及びＱ２で接触することになる。
【００３４】
これにより、電流は、電気部品７の接続端子部８から第１コンタクトピン２８内を矢印Ａ，Ｂと流れ、点Ｑ１，Ｑ２間は導電部材２７を矢印Ｃ方向に流れ、そして、点Ｑ２より第２コンタクトピン２９に入って第２コンタクトピン２９内を矢印Ｄ，Ｅと流れて回路基板３の接点電極４まで達する。
【００３５】
この第１の実施形態によれば、第１及び第２コンタクトピン２８，２９は、それぞれ電気部品７の接続端子部８及び回路基板３の接点電極４によって内方に押圧され、共にスルーホール２３ａ内に押し込まれるので、第１及び第２コンタクトピン２８，２９が接近することになる。しかも、第１及び第２コンタクトピン２８，２９は、それらの間に介挿された弾性部材２５の屈曲により直立状態から僅かに倒れ、基部２４ａの点Ｑ１，Ｑ２でスルーホール２３ａの内周面に形成された導電部材２７と略一定位置で確実に接触するので、点Ｑ１，Ｑ２間はスルーホール２３ａ内周面の導電部材２７で短絡され電流の流路が短縮される。これにより、電気部品７の高周波特性の試験が安定に実施可能となる。さらに、電気部品７の複数の接続端子部８と回路基板３の接点電極４間の接続抵抗値のばらつきが抑制され、安定な電気的接続が確保され、電気部品７の性能試験の信頼性が向上する。
【００３６】
図７は、本発明によるコンタクトユニット１１の第２の実施形態を示す要部断面斜視図である。この実施形態は、絶縁部材２２が多層配線基板であり、各層に設けられた配線路がそれぞれ所望のスルーホール２３ａの導電部材２７と接続されたものである。具体的一例を説明すると、多層配線基板に電気部品７の接続端子部８に対応して接続手段１３が複数設けられており、多層配線基板の第１層目の配線路３５ａ及び３５ｂはそれぞれ接続手段１３ａ，１３ｂの導電部材２７ａ，２７ｂと接続し、２層目の配線路３５ｃは、接続手段１３ｃの導電部材２７ｃと、３層目の配線路３５ｄ，３５ｅはそれぞれ接続手段１３ｄ，１３ｅの導電部材２７ｄ，２７ｅと接続するように形成されている。そして、各配線路３５ａ〜３５ｅの他端部は、離れた場所に別個独立して設けられた図示省略の他の接続手段１３を介して回路基板３の接点電極４と接続されている。または、各配線路３５ａ〜３５ｅの他端部は、コネクタ等の別の接続手段に直接接続されてもよい。
【００３７】
この場合は、電気部品７の接続端子部８に対応して設けられた複数の接続手段１３に対して、回路基板３の接点電極４に対応して別個独立に設けられた複数の接続手段１３とを多層配線路を通して接続することができ、稠密配列された電気部品７の接続端子部８の配列ピッチに対して回路基板３の接点電極４の配列ピッチを広く形成すること（以下、ファンアウト）ができ、回路基板３の接点電極４の取り回し自由度が増す。なお、図７には第２コンタクトピン２９が示されているが、これは、回路基板３の接点電極４をファンアウトする場合及びしない場合のいずれにも対応できようにしたものである。
【００３８】
図８は、多層配線基板を備えたコンタクトユニット１１の他の構成例を示すものであり、電気部品７の接続端子部８の配列ピッチに対して回路基板３の接点電極４のファンアウトを可能にしたものである。即ち、多層配線基板の一面に設けられた第１穴部２３ｂに収納されており、電気部品７の接続端子部８に圧接して電気的に接触する複数の第１コンタクトピン２８と、多層配線基板の各層に形成された配線路３５と電気的に接続して第１穴部（ビアホール）２３ｂの内周面に設けられた導電部材２７と、第１コンタクトピン２８を外方に付勢してその一部を第１穴部２３ｂから突出させると共に第１コンタクトピン２８への押圧で屈曲する弾性部材２５と、を備えたものである。
【００３９】
さらに、多層配線基板の他方の面に設けられた第２穴部（ビアホール）２３ｃに収納されており、回路基板３の接点電極４に圧接して電気的に接触する複数の第２コンタクトピン２９と、多層配線基板の各層に形成された配線路３５を介して第１穴部２３の導電部材２７と電気的に接続して第２穴部２３ｃの内周面に設けられた導電部材２７と、第２コンタクトピン２９を外方に付勢してその一部を第２穴部２３ｃから突出させると共に第２コンタクトピン２９への押圧で屈曲する弾性部材２５と、を備えたものである。なお、第１穴部２３ｂと第２穴部２３ｃとは、互いに離れた場所に別個独立に形成されている。
【００４０】
これにより、稠密配列された電気部品７の接続端子部８の配列ピッチに対して回路基板３の接点電極４をファンアウトでき、回路基板３の接点電極４の取り回し自由度が増す。なお、同図においては、第１及び第２穴部２３ｂ，２３ｃは所定の深さに形成されたものであるが、これらは多層配線基板を貫通するものであってもよい。この場合、第１または第２コンタクトピン２８，２９を設けない他方の開放端部は、別部材で塞がれることになる。また、第１穴部２３ｂの内周面に設けられた導電部材２７は、多層配線基板の各層の配線路を介してコネクタ等の別の接続手段に直接接続されてもよい。
【００４１】
以上の説明では、本発明によるコンタクトユニット１１を電気部品用ソケットに適用した例について説明したが、コンタクトユニットは、上述の電気部品用ソケットに限らず、例えば、各種電気部品の検査用プローブ等にも適用することができる。また、絶縁物にただ一つのスルーホール２３ａまたは第１若しくは第２穴部２３ｂ，２３ｃを形成して接続手段１３を設けた単一ユニットとしても適用することができる。さらにまた、第１及び第２穴部２３ｂ，２３ｃは、絶縁物の同一面に離れて設けられており、そこに接続手段１３が設けられたものでもよい。この場合、第１及び第２穴部２３ｂ，２３ｃの内周面に備えた導電部材２７は、互いに配線部材により接続される。そして、スルーホール２３ａまたは第１若しくは第２穴部２３ｂ，２３ｃは、押圧方向に対して斜めに形成されてもよい、これにより、弾性部材２５の屈曲を確実に生じさせることができ、収納された接触子２４とスルーホール２３ａまたは第１若しくは第２穴部２３ｂ，２３ｃ内周面の導電部材２７との接触を安定に行わせることができる。
【００４２】
【発明の効果】
本発明は以上のように構成されたので、請求項１に係る発明によれば、絶縁物の少なくとも一面に設けられた穴部に収納され、弾性部材で外方に付勢されて穴部から突出する接触子を、二つの被接続物のうち、少なくとも一方の被接続物で押圧し、弾性部材を屈曲させ、接触子を穴部の内周面に設けられ他方の被接続物と電気的に接続する導電部材に接触させ、二つの被接続物を電気的に接続することができる。したがって、接触子を穴部の内周面に設けられた導電部材に確実に接触させて両被接続物間の接続抵抗値のばらつきを低下させ、安定な電気的接続を確保することができる。これにより、電気部品等の性能試験の精度を向上することができる。
【００４３】
また、請求項２及び３に係る発明によれば、一対の接触子を対向する二つの被接続物で両側方から押圧してスルーホール内に押し込み、弾性部材を屈曲させ、一対の接触子をスルーホールの内周面に設けた導電部材に接触させて二つの被接続物を電気的に接続することができる。したがって、二つの被接続物間の電流の流路が短縮され、被接続物の高周波特性の試験が安定に実施可能となる。
【００４４】
さらに、請求項４に係る発明によれば、被接続物が備える複数の接続端子部または接点電極を、該接続端子部または接点電極に対応して形成された複数の穴部に収納された複数の接続手段と接触させ、二つの被接続物を接続する。従って、被接続物の複数の接続端子部に係る電気性能を同時に測定することができる。
【００４５】
さらにまた、請求項５に係る発明によれば、二つの被接続物のうち、一方の被接続物の接続端子部の配列ピッチに対して他方の被接続物の接点電極の配列ピッチを広く形成することが可能になる。従って、被接続物の接続端子部が稠密に形成されている場合にも、他方の被接続物の接点電極の取り回し自由度を増すことができる。
【００４６】
そして、請求項６に係る発明によれば、脱落防止部材で穴部に収納された接触子を穴部の開放端部から脱落するのを防止することができる。従って、コンタクトユニットの取り扱いが容易になる。
【図面の簡単な説明】
【図１】本発明によるコンタクトユニットの第１の実施形態を示す要部拡大断面図である。
【図２】上記コンタクトユニットを適用した電気部品用ソケットを示す断面図である。
【図３】接触子の接触端面形状の一例を示す説明図である。
【図４】接触子の他の形状示す説明図である。
【図５】上記コンタクトユニットを適用した電気部品用ソケットの動作を説明する断面図である。
【図６】上記コンタクトユニットの動作を説明する断面図である。
【図７】本発明によるコンタクトユニットの第２の実施形態を示す要部拡大断面斜視図である。
【図８】上記コンタクトユニットの他の構成例を示す断面図である。
【図９】従来のコンタクトユニットにおける電気部品の接続端子部とコイル状接点との第１の接触状態を示す要部拡大断面図である。
【図１０】従来のコンタクトユニットにおける電気部品の接続端子部とコイル状接点との第２の接触状態を示す要部拡大断面図である。
【図１１】従来のコンタクトユニットにおける電気部品の接続端子部とコイル状接点との第３の接触状態を示す要部拡大断面図である。
【図１２】従来のコンタクトユニットにおける電気部品の接続端子部の変形状態を示す断面図である。
【符号の説明】
１１…コンタクトユニット
１３，１３ａ〜１３ｅ…接続手段
２２…絶縁部材
２３…穴部
２３ａ…スルーホール
２３ｂ…第１穴部
２３ｃ…第２穴部
２４…接触子
２４ａ…基部
２４ｂ…ピン状接点
２５…弾性部材
２６…脱落防止部材
２７，２７ａ〜２７ｅ…導電部材
２８…第１コンタクトピン
２９…第２コンタクトピン
３０…孔部
３５，３５ａ〜３５ｅ…配線路[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a contact unit for electrically connecting opposed objects to be connected, and more specifically, is housed in a hole provided with a conductive member on an inner peripheral surface, and is urged outward by an elastic member to protrude. The present invention relates to a contact unit which secures a stable electrical connection by pressing an object to be connected against a contact member to be bent to bend an elastic member and bringing the contact member into contact with a conductive member at a predetermined position.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as this type of contact unit, for example, there is a contact unit applied to an electrical component socket used for a performance test of an electrical component as disclosed in Japanese Patent Application Laid-Open No. H11-297439. In this contact unit, a plurality of through holes 2 are formed in a guide plate 1 provided at the bottom of a frame (not shown) so as to face the respective contact electrodes 4 of the circuit board 3 as shown in an enlarged manner in FIG. And a conductive terminal 5 formed on the inner peripheral surface of the through-hole 2, a coil-shaped contact 6 is provided in the through-hole 2, and a connection terminal portion 8 made of solder balls arranged and formed on the bottom surface of the electric component 7. And a contact with the contact electrode 4 of the circuit board 3.
[0003]
In this contact unit, when the coil-shaped contact 6 is pressed by the circuit board 3 and the electric component 7 from both upper and lower directions, the coil-shaped contact 6 is compressed and bent, and the coil-shaped contact 6 is formed on the inner peripheral surface of the through hole 2. And contacts the conductive film 5 at points P1, P2, and P3. In this case, P1 and P3 are short-circuited by the conductive film 5, the connection resistance value between the connection terminal portion 8 of the electric component 7 and the contact electrode 4 of the circuit board 3 decreases, and the inductance also decreases.
[0004]
[Problems to be solved by the invention]
However, in such a conventional contact unit, the bent state of the coil-shaped contact 6 is not limited to the one shown in FIG. 9, and for example, as shown in FIG. It may bend so as to come into contact with the membrane 5. In this case, P1 and P2 are short-circuited by the conductive film 5, and the connection resistance value decreases. However, it is larger than the connection resistance value in FIG.
[0005]
Further, as shown in FIG. 11, the coil-shaped contact 6 may be bent so as to be in contact with the conductive film 5 only at the point P1. In this case, since the connection resistance value and the inductance are the inherent resistance value and inductance of the coil-shaped contact 6 itself, the values are larger than those in FIGS. 9 and 10 described above.
[0006]
As described above, according to the conventional contact unit, the bent state of the coil-shaped contact 6 is not constant, and the connection resistance value between the plurality of connection terminal portions 8 of the electric component 7 and the contact electrode 4 of the circuit board 3 varies, The performance test of the electric component 7 could not be performed stably. In particular, such a variation in the connection resistance value and the inductance makes the electrical connection unstable, and the reliability of the performance test of the high-frequency electrical component may be lost.
[0007]
Therefore, the present invention addresses such a problem, and presses the object to be connected to a contact that is housed in a hole provided with a conductive member on the inner peripheral surface and is urged outward by an elastic member to protrude. It is an object of the present invention to provide a contact unit that bends an elastic member and contacts a contact member with a conductive member at a predetermined position to secure stable electrical connection.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a contact unit according to the present invention electrically connects two objects to be connected by connecting means housed in a hole formed on at least one surface of an insulating member, The connection means is a contact that is in pressure contact with and electrically contacts at least one of the two connected objects, and is electrically connected to the other connected object provided on the inner peripheral surface of the hole. And a resilient member that urges the contact outward and partially protrudes from the hole and is deformed by pressing the contact.
[0009]
With such a configuration, the contact that is housed in the hole provided on at least one surface of the insulator and is urged outwardly by the elastic member and protrudes from the hole is provided in at least one of the two connected objects. And the elastic member is bent, the contact is brought into contact with a conductive member provided on the inner peripheral surface of the hole and electrically connected to the other connected object, and the two connected objects are electrically connected. Connection. Thus, the contact is reliably brought into contact with the conductive member provided on the inner peripheral surface of the hole, so that the variation in the connection resistance value between the two connected objects is reduced, and stable electrical connection is ensured.
[0010]
The hole is a through-hole formed through the insulator.
Then, the connecting means urges a pair of contacts located at both ends of the through-hole by an elastic member disposed inside the through-hole, and partially urges the outer part from both ends of the through-hole. It is made to protrude.
Thereby, a pair of contacts is pressed from both sides by two opposing connected objects and pushed into the through hole, the elastic member is bent, and the pair of contacts is provided on the inner peripheral surface of the through hole. To connect the two connected objects electrically.
[0011]
Further, a plurality of the hole portions are formed corresponding to a plurality of connection terminal portions or contact electrodes included in at least one of the two connected objects, and each housing the connection means. is there. Thereby, a plurality of connection terminal portions or contact electrodes provided in the object to be connected are brought into contact with a plurality of connection means housed in a plurality of holes formed corresponding to the connection terminal portions or contact electrodes, and two Connect the object to be connected.
[0012]
Further, the plurality of connection means are provided on at least one surface of the multilayer wiring board, and a conductive member provided in a hole of the plurality of connection means, and a connection terminal portion of a connected object electrically corresponding to each other. Alternatively, a contact electrode or a conductive member in another hole provided separately and separately is connected by a wiring path formed in each layer of the multilayer wiring board. This makes it possible to form the arrangement pitch of the contact electrodes of the other connected object wider than the arrangement pitch of the connection terminal portions of one of the two connected objects.
[0013]
The connection means includes a drop-off prevention member for holding a contact housed in the hole at the open end of the hole. This prevents the contactor housed in the hole by the falling-off preventing member from falling off from the open end of the hole.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view for explaining a first embodiment of a contact unit according to the present invention, and FIG. 2 is a cross-sectional view showing an electrical component socket to which the contact unit is applied. This electrical component socket is for electrically connecting an electrical component such as a PGA (Pin Grid Array) type or a BGA type to a circuit board, holds the electrical component in a detachable manner, and reduces the initial failure of the electrical component. It is used for a burn-in test or the like to be removed, and includes a socket body 9, a socket cover 10, and a contact unit 11.
[0015]
The socket body 9 is for positioning and holding the electric component 7, and includes a mounting portion 12 and a pressing member 20.
The mounting portion 12 is for positioning and mounting the electric component 7, and is formed at the center of the upper surface of the socket body 9. More specifically, the upper surface of a floating plate 15, which is always urged upward by a helical spring (not shown) in a recessed portion 14 formed inside the upper surface of the socket main body 9 so as to be vertically movable, is placed on the mounting portion 12. And In the plane of the floating plate 15, pin introduction holes for receiving contacts 24 of the contact unit 11, which will be described later, are formed at respective positions corresponding to the connection terminal portions of the electric component 7. The structure of the mounting portion 12 is not limited to the above-described floating type, and may be a fixed type.
[0016]
Pressing members 20 are provided on both sides above the mounting portion 12. The pressing member 20 presses the electric component 7 from above. The pressing member 20 is rotatably supported on the socket body 9 by a pivot pin 17, and its outer end 18 is connected to the socket cover 10 described later. The pressing member 20 is formed in a shape capable of rotating around the pivot pin 17 as the shaft 19 moves up and down in contact with the provided shaft 19. When the pressing member 20 is in the upright state, a pressing portion 21 is provided at an inner end portion that contacts the upper surface of the electric component 7.
[0017]
A socket cover 10 is provided on the upper surface of the socket body 9. The socket cover 10 holds the electric component 7 by urging the pressing member 20 in an upright state. The socket cover 10 has a through hole 33 at a corner thereof. A support member 35, which forms 34 and has the other end fixed to the socket body 9, is inserted and provided. A shaft 19 is provided inside the socket cover 10. The shaft 19 comes into contact with the outer end 18 of the pressing member 20, and serves to convert the vertical movement into a turning operation of the pressing member 20. Further, the helical spring 32 is mounted on the support member 35. The helical spring 32 constantly urges the socket cover 10 upward, and thereby keeps the pressing member 20 in an upright state to hold the electric component 7.
[0018]
A contact unit 11 is provided below the mounting portion 12 of the socket body 9. The contact unit 11 is for electrically connecting the circuit board 3 and the electric component 7 as two objects to be connected, and as shown in FIG. 1, an insulating member 22, a hole 23, and a connecting means. 13 and a falling-off prevention member 26.
[0019]
The insulating member 22 is, for example, glass or ceramic, and has a hole 23 on at least one surface of the insulating member 22. The hole 23 holds the connection means 13, and its inner wall surface is formed smoothly by polishing or the like. Specifically, the holes 23 are through holes 23 a formed through the insulator 22, and a plurality of holes 23 are formed corresponding to the plurality of connection terminals and the contact electrodes of the circuit board 3 and the electric component 7. I have. Note that the insulating member 22 may be an epoxy resin containing glass fiber or a known insulating resin material.
[0020]
The connection means 13 is provided in each of the plurality of holes 23. The connection means 13 connects the contact electrodes of the circuit board 3 and the connection terminals of the electric components, and includes a contact 24, a conductive member 27, and an elastic member 25.
[0021]
At both ends of the connection means 13, a pair of contacts 24 is provided. The contact 24 presses against and electrically contacts the connection terminal portion of the electric component 7 and the contact electrode of the circuit board 3, and includes a first contact pin 28 that contacts the connection terminal portion of the electric component 7, The second contact pins 29 are in contact with the contact electrodes of the circuit board 3. In both cases, the pin-shaped contact 24b protruding outside the insulating member 22 is made thinner than the base 24a in the through hole 23a, and is formed of a conductive member such as brass, for example. At least the surface of the base 24a of the first and second contact pins 28 and 29 is subjected to lubrication plating as an intermediate layer with nickel (Ni) as an underlayer, and the uppermost surface is plated with gold (Au). Processing may be performed.
[0022]
Here, the contact end surface of the first contact pin 28 has, for example, a conical concave shape and a conical convex shape as shown in FIG. The conical concave type shown in FIG. 6A is suitable for receiving the ball-shaped connection terminal portion of the BGA type electric component, and the conical convex type shown in FIG. 6B is a pin-shaped connection terminal of the PGA type electric component. It is suitable for ensuring stable contact with the part. The shape of the contact end face is not limited to that shown in FIG. 3, and may be, for example, a flat surface or a crown shape.
[0023]
A conductive member 27 is provided on the inner peripheral surface of the hole 23. The conductive member 27 is in contact with the pair of contacts 24 and electrically short-circuits them, and is, for example, a copper (Cu) -nickel (Ni) -gold (Au) plating film. Further, a lubricating plating process as an intermediate layer may be performed with nickel (Ni) as a base, and a plating process with gold (Au) may be performed on the uppermost surface. In this case, the lubricating plating contains, for example, 83% of Ni, 9% of phosphorus (P), and 8% of Teflon (PTFE: registered trademark), and is formed with a thickness of 0.2 μm to 0.3 μm. You. Thereby, the contact with the contact 24 whose surface is lubricated and plated is smoothed, and even in a test in an inert gas atmosphere, the contact 24 is prevented from sticking to the conductive member 27 and not moving. be able to. In addition, the conductive member 27 is not limited to a member formed with a thin film, and may be a member in which a metal pipe is press-fitted into the through hole 23a.
[0024]
An elastic member 25 is inserted between the first and second contact pins 28 and 29. The elastic member 25 urges the first and second contact pins 28, 29 outward to partially project from both ends of the through hole 23a, and the first and second contact pins 28, 29 It is configured to bend when pushed inward, for example, a helical spring. The two ends of the elastic member 25 are not in contact with the end surface of the base 24a of the contact 24 evenly, for example, in a ring shape, but are located at one position off the center line of the contact 24. Is abutted. As a result, a rotating force acts on the contact 24 (first and second contact pins 28 and 29) when the contact 24 is pushed inward. In addition, the elastic member 25 may be formed of any of a conductive material and an insulating material, and is not limited to a helical spring, but may be any sponge or any other material having a stretchable elastic function. Good.
[0025]
Further, drop-off preventing members 26 are provided at both ends of the through hole 23a. The falling-off preventing member 26 holds the first and second contact pins 28 and 29 housed in the through-hole 23a at the open end of the through-hole 23a to prevent the falling-off member 26 from falling off. , Having a through hole 30 smaller than the outer shape of the base 24a of the first and second contact pins 28 and 29 and larger than the outer shape of the pin-shaped contact 24b, and the pin-shaped contact 24b is inserted into the hole 30. Thus, both ends of the through hole 23a are closed.
[0026]
FIG. 4 shows another shape of the contact 24. FIG. 3A shows that the center lines of the base 24a and the pin-shaped contact 24b are formed so as to be shifted from each other in the direction parallel to each other. According to this, the average action point a of the force by which the elastic member 25 presses the base portion 24a upward by the compression restoring force, and the action of the force by which the connection terminal portion 8 of the electric component 7 presses the pin-shaped contact 24b downward. Since the point b is shifted in the left-right direction shown in the figure and the directions of the forces are opposite to each other, the base 24a of the contact 24 rotates in the direction of the arrow R, and the point Q1 moves through the through-line shown in FIG. It comes into contact with the conductive member 27 formed on the inner peripheral surface of the hole 23a.
[0027]
In FIG. 4B, the center lines of the base 24a and the pin-shaped contact 24b are formed so as to be shifted from each other in the cross direction. According to this, the average point of action a of the force by which the elastic member 25 presses the base 24a upward due to its compression restoring force, and the point of action of the force by which the connection terminal of the electric component 7 presses the pin-shaped contact 24b downward. b is shifted in the left-right direction shown in FIG. 2 and the directions of the forces are opposite to each other, so that the base 24a of the contactor 24 rotates in the direction of arrow R, and the point Q1 becomes the through hole shown in FIG. The contact member 23a comes into contact with the conductive member 27 on the inner peripheral surface.
[0028]
Further, FIG. 4C shows that the inner end face of the base 24a is formed to be inclined with respect to the center line of the base 24a. According to this, the average action point a of the force by which the elastic member 25 presses the base 24a of the contact 24 upward due to its compression restoring force is that the connection terminal of the electric component 7 presses the pin-shaped contact 24b downward. It coincides with the point of application of force b in the vertical direction. However, since the direction in which the elastic member 25 presses the base 24a is obliquely upward and rightward as shown in the figure, the base 24a moves in the direction of the arrow R, and the point Q1 is a conductive member on the inner peripheral surface of the through hole 23a shown in FIG. 27.
[0029]
In any of the above cases, bending of the elastic member 25 can be reliably caused in a certain direction, and stable contact between the contact 24 and the conductive member 27 on the inner peripheral surface of the through hole 23a can be ensured. Variations in the connection resistance between the plurality of connection terminals of the component 7 and the contact electrodes of the circuit board 3 can be suppressed.
[0030]
Next, the operation of the electrical component socket to which the contact unit 11 configured as described above is applied will be described.
First, as shown in FIG. 2, the electrical component socket is fixed by pressing the second contact pins 29 of the contact unit 11 on the contact electrodes 4 of the circuit board 3 and pressing the second contact pins 29 on the circuit board 3. Next, as shown in FIG. 5, the socket cover 10 of the electrical component socket is pushed down by an external force against the urging force of the helical spring 32. At this time, as the shaft 18 provided on the inner side surface of the socket cover 10 is lowered, the pressing member 20 slides on the shaft 19 at the outer end 18 thereof, rotates around the pivot pin 17 and falls outward. The upper part of the mounting part 12 is opened so that the electric component 7 can be inserted.
[0031]
Next, the electric component 7 is mounted on the mounting portion 12. At this time, the outer peripheral edge of the electric component 7 is regulated by the positioning portions provided at the four corners of the mounting portion 12, and a plurality of connection terminal portions 8 arranged on the lower surface of the electric component 7 have pin introduction holes of the floating plate 15. 16 is positioned. Thereafter, the pressing on the socket cover 10 is removed. Then, the socket cover 10 is pushed upward by the compression reaction force of the helical spring 32, the shaft 19 is raised accordingly, the outer end 18 of the pressing member 20 is pushed upward, and the pressing member 20 pushes the pivot pin 17. It turns to the center and stands up. At this time, as shown in FIG. 2, the pressing portion 21 of the pressing member 20 comes into contact with the upper surface of the electric component 7 and presses the electric component 7 downward.
[0032]
In this case, as shown in FIG. 6, the electric component 7 pushes down the floating plate 15 in a state where the connection terminal portion 8 is introduced into the pin introduction hole 16 with the pressing by the pressing member 20. Then, the connection terminal portion 8 comes into contact with the first contact pin 28 of the contact unit 11 introduced into the pin introduction hole 16 and pushes it further down.
[0033]
As a result, the first and second contact pins 28 and 29 are pressed from above and below by the connection terminal portion 8 of the electric component 7 and the contact electrode 4 of the circuit board 3, so that both are pushed into the through hole 23 a. The first and second contact pins 28 and 29 fall slightly from the upright state due to the compression and bending of the elastic member 25, and the point of the conductive member 27 and the base 24a formed on the inner peripheral surface of the through hole 23a. Contact will be at Q1 and Q2.
[0034]
As a result, the current flows from the connection terminal portion 8 of the electric component 7 through the first contact pins 28 to the arrows A and B, flows between the points Q1 and Q2 through the conductive member 27 in the direction of the arrow C, and from the point Q2. After entering the second contact pin 29 and flowing through the second contact pin 29 in the direction of arrows D and E, it reaches the contact electrode 4 of the circuit board 3.
[0035]
According to the first embodiment, the first and second contact pins 28 and 29 are pressed inward by the connection terminal portions 8 of the electric component 7 and the contact electrodes 4 of the circuit board 3, respectively, and both of the through holes 23a are provided. The first and second contact pins 28 and 29 approach each other. Moreover, the first and second contact pins 28 and 29 slightly fall from the upright state due to the bending of the elastic member 25 interposed therebetween, and the inner peripheral surface of the through hole 23a at the points Q1 and Q2 of the base 24a. The contact between the points Q1 and Q2 is short-circuited by the conductive member 27 on the inner peripheral surface of the through hole 23a, and the current flow path is shortened. Thereby, the test of the high frequency characteristics of the electric component 7 can be stably performed. Further, variation in the connection resistance value between the plurality of connection terminal portions 8 of the electrical component 7 and the contact electrode 4 of the circuit board 3 is suppressed, stable electrical connection is secured, and the reliability of the performance test of the electrical component 7 is improved. improves.
[0036]
FIG. 7 is a cross-sectional perspective view of a main part showing a second embodiment of the contact unit 11 according to the present invention. In this embodiment, the insulating member 22 is a multilayer wiring board, and the wiring paths provided in each layer are connected to the conductive member 27 of a desired through hole 23a. To explain a specific example, a multilayer wiring board is provided with a plurality of connection means 13 corresponding to the connection terminal portions 8 of the electric components 7, and the first-layer wiring paths 35a and 35b of the multilayer wiring board are connected to each other. The second-layer wiring path 35c is connected to the conductive members 27a and 27b of the means 13a and 13b, the second-layer wiring path 35c is connected to the conductive member 27c of the connecting means 13c, and the third-layer wiring paths 35d and 35e are connected to the conductive means of the connecting means 13d and 13e, respectively. It is formed so as to be connected to the members 27d and 27e. The other end of each of the wiring paths 35a to 35e is connected to the contact electrode 4 of the circuit board 3 via another connection means 13 (not shown) provided separately and separately at a remote location. Alternatively, the other end of each of the wiring paths 35a to 35e may be directly connected to another connection means such as a connector.
[0037]
In this case, a plurality of connecting means 13 provided independently corresponding to the contact electrodes 4 of the circuit board 3 are provided for a plurality of connecting means 13 provided corresponding to the connecting terminal portions 8 of the electric component 7. Can be connected through a multilayer wiring path, and the arrangement pitch of the contact electrodes 4 of the circuit board 3 is made wider than the arrangement pitch of the connection terminals 8 of the densely arranged electric components 7 (hereinafter, fan-out). ) Can be performed, and the degree of freedom in arranging the contact electrodes 4 on the circuit board 3 is increased. Although FIG. 7 shows the second contact pins 29, the second contact pins 29 are designed to cope with both cases where the contact electrodes 4 of the circuit board 3 are fanned out and not.
[0038]
FIG. 8 shows another example of the configuration of the contact unit 11 including the multilayer wiring board. The contact electrodes 4 of the circuit board 3 can be fan-out with respect to the arrangement pitch of the connection terminals 8 of the electric components 7. It was made. That is, a plurality of first contact pins 28 which are housed in the first holes 23b provided on one surface of the multilayer wiring board and are brought into pressure contact with the connection terminal portions 8 of the electric component 7 to make electrical contact therewith; The conductive member 27 provided on the inner peripheral surface of the first hole (via hole) 23b and electrically connected to the wiring path 35 formed in each layer of the substrate, and the first contact pin 28 are urged outward. And a resilient member 25 protruding a part of the lever from the first hole 23b and bending when pressed against the first contact pin 28.
[0039]
Further, the plurality of second contact pins 29 which are housed in the second holes (via holes) 23c provided on the other surface of the multilayer wiring board and are in pressure contact with the contact electrodes 4 of the circuit board 3 to make electrical contact therewith. And a conductive member 27 electrically connected to the conductive member 27 of the first hole 23 via the wiring path 35 formed in each layer of the multilayer wiring board and provided on the inner peripheral surface of the second hole 23c. And an elastic member 25 which urges the second contact pin 29 outward to project a part thereof from the second hole 23c and which is bent by pressing the second contact pin 29. The first hole 23b and the second hole 23c are formed separately and independently from each other.
[0040]
As a result, the contact electrodes 4 of the circuit board 3 can be fanned out with respect to the arrangement pitch of the connection terminals 8 of the densely arranged electric components 7, and the degree of freedom in arranging the contact electrodes 4 of the circuit board 3 increases. Although the first and second holes 23b and 23c are formed to have a predetermined depth in the drawing, they may penetrate the multilayer wiring board. In this case, the other open end where the first or second contact pins 28 and 29 are not provided is closed by another member. Further, the conductive member 27 provided on the inner peripheral surface of the first hole 23b may be directly connected to another connection means such as a connector via a wiring path of each layer of the multilayer wiring board.
[0041]
In the above description, an example in which the contact unit 11 according to the present invention is applied to an electrical component socket has been described. However, the contact unit is not limited to the electrical component socket described above, and may be, for example, a probe for testing various electrical components. Can also be applied. Further, the present invention can also be applied as a single unit in which only one through hole 23a or the first or second hole portion 23b, 23c is formed in the insulator and the connection means 13 is provided. Furthermore, the first and second holes 23b and 23c may be provided separately on the same surface of the insulator, and the connection means 13 may be provided there. In this case, the conductive members 27 provided on the inner peripheral surfaces of the first and second holes 23b and 23c are connected to each other by a wiring member. The through-hole 23a or the first or second hole 23b, 23c may be formed obliquely with respect to the pressing direction, whereby the elastic member 25 can be surely bent and stored. The contact between the contact 24 and the conductive member 27 on the inner peripheral surface of the through hole 23a or the first or second hole 23b, 23c can be stably performed.
[0042]
【The invention's effect】
Since the present invention is configured as described above, according to the invention according to claim 1, the insulating member is housed in the hole provided on at least one surface of the insulator, and is urged outward by the elastic member to remove the hole from the hole. The projecting contact is pressed by at least one of the two connected objects, the elastic member is bent, and the contact is provided on the inner peripheral surface of the hole and electrically connected to the other connected object. And the two connected objects can be electrically connected. Therefore, the contact can be reliably brought into contact with the conductive member provided on the inner peripheral surface of the hole to reduce the variation in the connection resistance value between the two connected objects, thereby ensuring a stable electrical connection. Thereby, the accuracy of the performance test of the electric component or the like can be improved.
[0043]
According to the second and third aspects of the present invention, the pair of contacts are pressed from both sides by two opposing connected objects and pushed into the through holes, the elastic member is bent, and the pair of contacts is formed. The two objects can be electrically connected by contacting the conductive member provided on the inner peripheral surface of the through hole. Therefore, the current flow path between the two connected objects is shortened, and the test of the high-frequency characteristics of the connected objects can be stably performed.
[0044]
Furthermore, according to the invention according to claim 4, a plurality of connection terminals or contact electrodes provided in the object to be connected are housed in a plurality of holes formed corresponding to the connection terminal portions or contact electrodes. And the two connected objects are connected. Therefore, it is possible to simultaneously measure the electrical performance of the plurality of connection terminals of the object.
[0045]
Furthermore, according to the invention according to claim 5, of the two connected objects, the arrangement pitch of the contact electrodes of the other connected object is formed wider than the arrangement pitch of the connection terminal portions of the one connected object. It becomes possible to do. Therefore, even when the connection terminal portions of the object to be connected are densely formed, the degree of freedom in the arrangement of the contact electrodes of the other object to be connected can be increased.
[0046]
According to the invention of claim 6, it is possible to prevent the contact accommodated in the hole from dropping from the open end of the hole by the drop-off preventing member. Therefore, handling of the contact unit is facilitated.
[Brief description of the drawings]
FIG. 1 is an enlarged sectional view showing a main part of a first embodiment of a contact unit according to the present invention.
FIG. 2 is a sectional view showing an electrical component socket to which the contact unit is applied.
FIG. 3 is an explanatory view showing an example of a contact end face shape of a contact.
FIG. 4 is an explanatory view showing another shape of a contact.
FIG. 5 is a cross-sectional view illustrating the operation of the electrical component socket to which the contact unit is applied.
FIG. 6 is a sectional view illustrating the operation of the contact unit.
FIG. 7 is an enlarged sectional perspective view of a main part showing a second embodiment of the contact unit according to the present invention.
FIG. 8 is a sectional view showing another configuration example of the contact unit.
FIG. 9 is an enlarged sectional view of a main part showing a first contact state between a connection terminal portion of an electric component and a coil-shaped contact in a conventional contact unit.
FIG. 10 is an enlarged sectional view of a main part showing a second contact state between a connection terminal portion of an electric component and a coil-shaped contact in a conventional contact unit.
FIG. 11 is an enlarged sectional view of a main part showing a third contact state between a connection terminal portion of an electric component and a coil-shaped contact in a conventional contact unit.
FIG. 12 is a cross-sectional view showing a deformed state of a connection terminal portion of an electric component in a conventional contact unit.
[Explanation of symbols]
11 ... Contact unit
13, 13a to 13e ... connecting means
22 ... insulating member
23 ... hole
23a ... Through hole
23b 1st hole
23c: 2nd hole
24 ... Contact
24a ... base
24b: pin-shaped contact
25 ... elastic member
26: Fall-out prevention member
27, 27a to 27e: conductive member
28 ... First contact pin
29 ... Second contact pin
30 ... hole
35, 35a to 35e ... Wiring path

Claims

A contact unit for electrically connecting two objects to be connected by a connection means housed in a hole formed on at least one surface of the insulating member,
The connection means is a contact that is in pressure contact with and electrically contacts at least one of the two connected objects, and is electrically connected to the other connected object provided on the inner peripheral surface of the hole. A conductive member connected to the elastic member, which urges the contact outward and partially protrudes from the hole, and is deformed by pressing the contact,
A contact unit comprising:

The contact unit according to claim 1, wherein the hole is a through hole formed through the insulator.

The connecting means urges a pair of contacts located at both ends of the elastic member outwardly with an elastic member disposed inside the through hole, and projects a part of the contact outward from both ends of the through hole. The contact unit according to claim 2, wherein the contact unit is provided.

A plurality of the hole portions are formed corresponding to a plurality of connection terminal portions or contact electrodes included in at least one of the two connected objects, and the connection units are respectively housed. The contact unit according to claim 1 or 2, wherein:

The plurality of connection means are provided on at least one surface of the multilayer wiring board, and include a conductive member provided in a hole of the plurality of connection means, and a connection terminal portion or a contact of a connected object electrically corresponding to each other. 5. The contact unit according to claim 4, wherein the electrode or a conductive member in another hole provided separately and separately is connected by a wiring path formed in each layer of the multilayer wiring board.

The contact according to any one of claims 1 to 5, wherein the connection means includes a drop-off preventing member for holding a contact housed in the hole at an open end of the hole. unit.