JP3989017B2

JP3989017B2 - Battery with terminal plate

Info

Publication number: JP3989017B2
Application number: JP2003184922A
Authority: JP
Inventors: 章岸田
Original assignee: Hitachi Maxell Energy Ltd
Current assignee: Hitachi Maxell Energy Ltd
Priority date: 2002-06-27
Filing date: 2003-06-27
Publication date: 2007-10-10
Anticipated expiration: 2023-06-27
Also published as: JP2004319423A

Description

【０００１】
【発明の属する技術分野】
本発明は、端子板付き電池に関する。さらに詳しくは、ハンダ付け処理をしなくとも電子機器等の回路基板に取り付け可能な端子板付き電池に関する。
【０００２】
【従来の技術】
ボタン形やコイン形などの扁平形の電池、あるいは、角形、円筒形などの電池は、アルカリ乾電池、リチウム電池、リチウム二次電池、アルカリ蓄電池に代表される一次電池、二次電池のいずれも、各種電子機器の主電源やメモリーバックアップ電源として広く用いられている。
【０００３】
上記電池を電子機器の回路基板に実装するにあたり、製造工程の効率化のために、回路基板へのハンダ付けを可能にする端子板を電池に接続し、他の電子部品と共に、リフロー炉を用いて回路基板にハンダ付けすることが考えられている。
【０００４】
ところが、リフロー炉の通過の際に電池が加熱され、短時間ではあるが、電池の温度が例えば１５０℃を越える高温に達するため、電池の構成部材に物理的変化あるいは化学的変化が生じ、電池の密閉性の低下、放電特性の低下、内部短絡、サイクル特性の低下などの問題を生じる。一方、電池を保護するために、他の電子部品とは別に電池のみ手作業でハンダ付けを行うと、作業効率が大幅に低下するため、リフロー炉を通過させても電池特性などに悪影響のない耐熱性の高い電池が求められていた。特に、融点が低い金属リチウムを負極に用い、揮発性の高い有機溶媒を電解液溶媒としたリチウム電池では、耐熱化のための技術開発が強く要望されていた。
【０００５】
このような要望に対し、耐熱性の高いパッキングを用いたり、高温での貯蔵性を向上させる添加剤を用いた電池が提案されている（特許文献１および２参照）。これによれば、電池の耐熱性が高まり、リフロー炉の通過に支障のない電池が得られる。
【０００６】
一方、ハンダ付けによる電池の固定をやめ、電池本体とこれに取り付けた端子板とで回路基板を挟み込むことにより、回路基板上に電池を固定し、電池の交換保守を容易にした電池の実装構造も提案されている（特許文献３参照）。この形式によれば、ハンダ付けなしでの電池の実装が可能となる。
【０００７】
【特許文献１】
特開平８−１５３５００号公報（段落番号０００２−０００８）
【特許文献２】
特開２０００−３２３１７１号公報（段落番号０００５−０００７）
【特許文献３】
特開平１０−６４４９０号公報（段落番号０００２−０００５）
【０００８】
【発明が解決しようとする課題】
しかしながら、電池そのものに耐熱性を付与する形態では、リフロー炉の通過に対応させるために電池のパッキングを耐熱性の高い材料にすると、汎用のポリオレフィンなどの材料に比べて材料コストが大幅にアップする。また、電解液に添加剤を含有させた場合は、程度の差がありこそすれ放電特性の低下を来すため、使用可能な電子機器が限定される。添加剤を加えたとしても、他の構成部材まで同様に耐熱性の高い材料を用いる必要があるため、やはり大幅なコストアップを招く。そもそも、回路基板との導通接続のためにハンダを用いることは、ハンダに含まれる鉛の環境への影響の問題もあり、環境保護の観点からハンダ使用量の低減化が求められている現状において好ましくない。
【０００９】
一方、電池本体とこれに取り付けた端子板とで回路基板を挟み込む実装構造によるときは、電池の外装体と回路基板の導電部とを直に接触させるため、実装時の電池の配置構成が限定され、電子機器の薄型化や回路の省スペース化などの点でネックになる。そのほか、振動による接触不良も生じやすく、信頼性の点でも問題が出る。
【００１０】
そこで本発明の目的は、電子機器等の回路基板に電池を実装する際の上記問題点を解決し、ハンダ付け処理をしなくとも、電池本体から導出した端子板の導出端部分を回路基板の導電部に圧入するだけで簡単かつ確実に取り付けられる端子板付き電池を提供することにある。
【００１１】
【課題を解決するための手段】
本発明の端子板付き電池は、図１ないし図８に示すごとく、電池本体２と、該電池本体２を回路基板５の導電部６に電気的に接続するための二つの端子板７・７とを備えている。前記端子板７は、前記電池本体２の上下面の負極と正極とにそれぞれ溶接固定されて水平方向に伸びる水平腕８と、前記水平腕８の延出端から下向きに折り曲げられて、前記導電部６に設けたスルーホール１３に圧入される導出端部分 9 とを含む。前記導出端部分９に、前記スルーホール１３内に臨む前記導電部６に接触する接触片１１を有する。前記接触片１１が、前記導出端部分９の上下方向の中途部に、該導出端部分９の前後厚み方向に突出するよう弾性変形可能に形成されており、前記接触片１１の弾性復元力により、該接触片１１が前記導電部６に圧接するように構成されていることを特徴とする。
電池本体２としては、ボタン形やコイン形などの扁平形の電池が用いて好適である。
これによれば、スルーホール１３に導出端部分９を圧入するだけで、スルーホール１３内の導電部６に接触片１１が圧接することにより、導電性が図られるとともに、該当の圧接力で導出端部分９を回路基板５の導電部６に確りと抜け止め状に支持固定できる。
また、接触片１１が弾性復元力で導電部６に圧接していると、接触片１１と導電部６との導通性が良好に確保され、かつ回路基板５に電池本体２をガタつくことなく安定的に支持固定できることになる。
【００１２】
また、本発明の端子付き電池は、図１ないし図４に示すごとく、電池本体２と、該電池本体２を回路基板５の導電部６に電気的に接続するための二つの端子板７・７とを備えている。前記端子板７は、前記電池本体２の上下面の負極と正極とにそれぞれ溶接固定されて水平方向に伸びる水平腕８と、前記水平腕８の延出端から下向きに折り曲げられて、前記導電部６に設けたスルーホール１３に圧入される導出端部分９とを含む。前記導出端部分９に前記導電部６に接触する接触片１１が、該導出端部分９の前後厚み方向に突出するよう弾性変形可能に打ち出し形成されており、前記接触片１１の上下端が、前記導出端部分９に両持ち梁状につながっており、前記接触片１１の弾性復元力により、該接触片１１が前記導電部６に圧接するように構成されていることを特徴とする。
電池本体２としては、ボタン形やコイン形などの扁平形の電池が用いて好適である。
これによれば、スルーホール１３に導出端部分９を圧入するだけで、スルーホール１３内の導電部６に接触片１１が圧接することにより、導電性が図られるとともに、該当の圧接力で導出端部分９を回路基板５の導電部６に確りと抜け止め状に支持固定できる。
また、接触片１１が弾性復元力で導電部６に圧接していると、接触片１１と導電部６との導通性が良好に確保され、かつ回路基板５に電池本体２をガタつくことなく安定的に支持固定できることになる。
このように、接触片１１が両持ち梁状に形成されていると、接触片１１の弾性復元力、ひいてはスルーホール１３内の導電部６に対する圧接力を有効に確保できることになる。
【００１３】
また、本発明の端子付き電池は、図５および図６に示すごとく、電池本体２と、該電池本体２を回路基板５の導電部６に電気的に接続するための二つの端子板７・７とを備えている。前記端子板７は、前記電池本体２の上下面の負極と正極とにそれぞれ溶接固定されて水平方向に伸びる水平腕８と、前記水平腕８の延出端から下向きに折り曲げられて、前記導電部６に設けたスルーホール１３に圧入される導出端部分９とを含む。前記導出端部分９には、前記導電部６に接触する接触片１１が、該導出端部分９の前後厚み方向に突出するよう弾性変形可能に切り起こし形成されており、前記接触片１１の下端が、前記導出端部分９に片持ち状につながっており、上端側が導出端部分９から離れる向きに突出しており、前記接触片１１の弾性復元力により、該接触片１１が前記導電部６に圧接するように構成されていることを特徴とする。
電池本体２としては、ボタン形やコイン形などの扁平形の電池が用いて好適である。
これによれば、スルーホール１３に導出端部分９を圧入するだけで、スルーホール１３内の導電部６に接触片１１が圧接することにより、導電性が図られるとともに、該当の圧接力で導出端部分９を回路基板５の導電部６に確りと抜け止め状に支持固定できる。
また、接触片１１が弾性復元力で導電部６に圧接していると、接触片１１と導電部６との導通性が良好に確保され、かつ回路基板５に電池本体２をガタつくことなく安定的に支持固定できることになる。
【００１４】
また、本発明の端子付き電池は、図７および図８に示すごとく、電池本体２と、該電池本体２を回路基板５の導電部６に電気的に接続するための二つの端子板７・７とを備えている。前記端子板７は、前記電池本体２の上下面の負極と正極とにそれぞれ溶接固定されて水平方向に伸びる水平腕８と、前記水平腕８の延出端から下向きに折り曲げられて、前記導電部６に設けたスルーホール１３に圧入される導出端部分９とを含む。前記導出端部分９に前記導電部６に接触する接触片１１が、該導出端部分９の前後厚み方向に突出するよう弾性変形可能に打ち出し形成されており、前記接触片１１の上下端が、前記導出端部分９に両持ち梁状につながっており、前記接触片１１が、前記導出端部分９の前後厚み方向の一方に打ち出し形成されて前後厚み方向に弾性変形可能な中央のばね板部１５と、中央の前記ばね板部１５の左右幅方向の両外側において前記導出端部分９の前後厚み方向の他方に打ち出し形成されて前後厚み方向に弾性変形可能な左右のばね板部１６・１６とを含み、前記接触片１１の弾性復元力により、該接触片１１が前記導電部６に圧接するように構成されていることを特徴とする。
電池本体２としては、ボタン形やコイン形などの扁平形の電池が用いて好適である。
これによれば、スルーホール１３に導出端部分９を圧入するだけで、スルーホール１３内の導電部６に接触片１１が圧接することにより、導電性が図られるとともに、該当の圧接力で導出端部分９を回路基板５の導電部６に確りと抜け止め状に支持固定できる。
また、接触片１１が弾性復元力で導電部６に圧接していると、接触片１１と導電部６との導通性が良好に確保され、かつ回路基板５に電池本体２をガタつくことなく安定的に支持固定できることになる。
このように、接触片１１が両持ち梁状に形成されていると、接触片１１の弾性復元力、ひいてはスルーホール１３内の導電部６に対する圧接力を有効に確保できることになる。
【００１５】
図１ないし図８に示すように、前記導出端部分９には、前記スルーホール１３に抜け止め状に係合する係合片１２を形成することができる。
これによれば、接触片１１が導出端部分９と導電部６との導通性を図る役割をし、係合片１２がスルーホール１３に導出端部分９を確りと支持固定する役割を担う。
【００１６】
図１ないし図４に示すように、前記導出端部分９に、前記スルーホール１３に抜け止め状に係合する係合片１２が形成されており、前記導出端部分９の幅方向の左右に、左右の幅寸法よりも上下の長さ寸法の大きい、上下縦長の前記接触片１１・１１が形成されており、前記導出端部分９には、左右の前記接触片１１・１１間の下方に上下縦長の前記係合片１２が形成された形態を採ることができる。
【００１７】
図１ないし図４に示すように、前記導出端部分９に、前記係合片１２が前記導出端部分９の前後厚み方向に突出するよう弾性変形可能に切り起こし形成されており、前記係合片１２は、これの先端が前記導出端部分９の下端につながっていて、上面側が前記導出端部分９から離れる向きに自由状態で突出しており、前記係合片１２は、これ自体が弾性変形することで前記スルーホール１３にこれの上方から圧入可能に構成された形態を採ることができる。
【００１８】
図５および図６に示すように、前記導出端部分９に、前記スルーホール１３に抜け止め状に係合する係合片１２が形成されており、前記導出端部分９の下端には、左右の前記接触片１１・１１の間に前記係合片１２が上向きに折り返し形成された形態を採ることができる。
【００１９】
図１ないし図６に示すように、前記スルーホール１３の下端の開口周縁には、前記導電部６が張り出し形成されており、前記導電部６の張り出し部分に、前記係合片１２の上端が受け止められるように構成することができる。
これによれば、導出端部分９と導電部６との導通性がより確実になる。
【００２０】
図１ないし図６に示すように、前記導出端部分９には、これの前後厚み方向の一方に前記接触片１１が、他方に前記係合片１２がそれぞれ突出している形態を採ることができる。
【００２１】
図７および図８に示すように、前記導出端部分９に、前記スルーホール１３に抜け止め状に係合する係合片１２が形成されており、前記導出端部分９が、左右幅方向の中央に配された前記接触片１１と、前記接触片１１の左右幅方向の両側に配された前記係合片１２とを含み、前記係合片１２が、左右幅方向に弾性変形可能に構成されている形態を採ることができる。
【００２２】
図７および図８に示すように、前記係合片１２が、前記スルーホール１３に臨む前記導電部６に接触している形態を採ることができる。
【００２３】
図７および図８に示すように、前記係合片１２が、下方に向けて片持ち状に連出されており、前記係合片１２の下端に、前記スルーホール１３の下端の開口周縁に引っ掛かる係止部２２が形成された形態を採ることができる。
これによれば、スルーホール１３に差し込んだ導出端部分９が上方に抜き外れるのをよく防止できる。
【００２４】
図１ないし図８に示すように、前記導出端部分９の左右幅方向の両端に、前記スルーホール１３の上端の開口周縁に受け止められるストッパー縁１４・１４が形成された形態を採ることができる。
これによれば、ストッパー縁１４・１４がスルーホール１３の上端の開口周縁に受け止められるまで、導出端部分９８をスルーホール１３に圧入すればよく、スルーホール１３に対して導出端部分９を常に過不足なく差し込むことができる。そのうえで、ストッパー縁１４・１４は、回路基板５に電池本体２を安定的に支持することにも貢献する。
【００２５】
（第１実施例）図１ないし図４は本発明の第１実施例を示しており、扁平な電池１としてコイン形リチウム電池を用いた。電池１は、ひとつの電池本体２に二つの端子板７・７を備えている。各端子板７・７の基端部は、電池本体２の上下の正負極にそれぞれ溶接固定されている。
【００２６】
電池本体２は、上面に開口部を有する有底筒状の電池ケース３と、この開口部を密閉状に封する蓋部４とからなり、電池ケース３を正極とし、蓋部４を負極としている。
【００２７】
端子板７・７は、回路基板５に設けられた２か所の導電部６・６と、電池本体２の上下の正負極との間を電気的に接続するとともに、この電池本体２を回路基板５に対して遊動不能に固定保持する機能を持つ。電池本体２は回路基板５上に両端子板７・７を介して僅かに浮き離れた状態で配置する。
【００２８】
各端子板７は、電池本体２の上下面の負極と正極とにそれぞれ溶接固定されて前後の水平方向に延びる水平腕８と、この水平腕８の延出端から下向きに折り曲げられた導出端部分９とが一体に形成された側面視で略Ｌ字形のプレス成形品である。なお、電池本体２の正極につながる端子板７は、水平腕８の延出端を上方にいったん持ち上げたのち、水平腕８の延出端に下向きの導出端部分９がつながっている。
【００２９】
各端子板７の導出端部分９には、幅方向の左右に一対の接触片１１・１１が導出端部分９の前後厚み方向に突出するよう弾性変形可能に打ち出し形成されている。
【００３０】
各接触片１１は所定の左右幅を有する上下縦長に形成されており、上下端が導出端部分９に両持ち梁状につながっている。とくに、接触片１１の下端部には、上がり傾斜のガイド部１１ａが曲げ形成されており、接触片１１の上端部１１ｂも下り傾斜状に曲げ形成されている。
【００３１】
更に、各端子板７の導出端部分９には、左右の接触片１１・１１間の下方に弾性変形可能な係合片１２が導出端部分９の前後厚み方向に突出するよう上向きに切り起こし形成されている。
【００３２】
この係合片１２は左右小幅で上下縦長に形成されており、これの下端が導出端部分９に片持ち状につながっている。係合片１２は、下端部１２ａが斜め上方に立ち上がる形状に形成され、上端部１２ｂが真っ直ぐ上向きの垂直状に形成されている。
【００３３】
接触片１１と係合片１２とは、接触片１１が前後厚み方向の一方に突出するとき、係合片１２が導出端部分９の他方に突出する関係にある。
【００３４】
回路基板５の導電部６にはスルーホール１３が上下貫通状に設けられている。すなわち、スルーホール１３の内周面が導電部６になっている。スルーホール１３の上下端の開口周縁には導電部６が張り出し形成されている。符号６ｃは、この導電部６の張り出し部分である。スルーホール１３は、平面視で左右方向に長く、前後方向に短い略四角形状を呈している。
【００３５】
次に、回路基板５に対する端子板付き電池１の装着要領を説明すると、電池本体２に一体化された各端子板７の導出端部分９を回路基板５のスルーホール１３にこれの上方から圧入する。このとき、接触片１１は傾斜状の下端ガイド部１１ａでスルーホール１３内にスムーズに嵌合案内され、係合片１２も傾斜下端部１２ａでスルーホール１３内にスムーズに嵌合案内される。そして、接触片１１および係合片１２は、スルーホール１３内の前後の導電部６の内面に接してそれぞれ導出端部分９側に弾性変形する。
【００３６】
導出端部分９の左右幅方向の両端には、スルーホール１３に対する導出端部分９の差し込み限界を規制するストッパー縁１４・１４が段付き状に形成されている。従って、導出端部分９はスルーホール１３に対してこれの上端の開口周縁にストッパー縁１４・１４が受け止められるまで完全に圧入することになる。
【００３７】
スルーホール１３に導出端部分９を完全に圧入すると、係合片１２の上端がスルーホール１３の下方に出て元の突出状態に弾性復元し、係合片１２の上端がスルーホール１３の下端の開口周縁に受け止められる。
【００３８】
スルーホール１３の下端の開口周縁には、導電部６の張り出し部分６ｃが形成されているので、係合片１２の上端は導電部６の張り出し部分６ｃで受け止められることになる。これにて、導出端部分９がスルーホール１３の上方へ抜け出ることが規制される。
【００３９】
スルーホール１３に導出端部分９を圧入した状態において、左右一対の各接触片１１は、弾性変形を受けているので、その弾性復元力で接触片１１の上下端部１１ａ・１１ｂ間の中間平坦部分１１ｃがスルーホール１３内に臨む導電部６に対して全面的に圧接する。
【００４０】
とくに接触片１１は、これの上下端が導出端部分９につながる両持ち梁状に形成されているので、スルーホール１３内の導電部６に対する接触片１１の上記圧接力は強力になる。したがって、この圧接力のみにてもスルーホール１３に対して導出端部分９をガタつきなく、かつ不用意に上下方向へは位置ずれすることなく確実に保持固定できる。そのうえで、各端子板７の導出端部分９は、回路基板５の導電部６に対して接触片１１・１１で電気的に導通状態となる。ストッパー縁１４・１４および係合片１２の上端も導通状態を補助する。
【００４１】
回路基板５から端子板付き電池１を離脱させる必要があるときは、係合片１２の上端を指先などでつかんで端子板７の導出端部分９に向かって撓み変形させることにより、係合片１２の上端をスルーホール１３内に導き、そのまま導出端部分９を引き上げればよい。
【００４２】
（第２実施例）図５および図６は請求項９に対応する本発明の第２実施例を示す。この第２実施例では、左右の接触片１１が端子板７の導出端部分９から切り起こし形成されている。すなわち各接触片１１は下端が導出端部分９に片持ち状につながっていて、上端側が導出端部分９から離れる向きに突出している。これによれば、スルーホール１３にこれの上方から導出端部分９を圧入したとき、接触片１１が導出端部分９側に弾性変形し、その弾性復元力で接触片１１の上端部分がスルーホール１３に臨む前後の導電部６に圧接する。
【００４３】
また、各端子板７の導出端部分９の下端には、左右の両接触片１１・１１間において係合片１２が上向きに折り返し形成されている。これによれば、スルーホール１３に導出端部分９を完全に圧入した状態において、係合片１２の上端が、スルーホール１３から抜け出て、これの下端の開口周縁（導電部６の張り出し部分６ｃ）に受け止められる。この状態は係合片１２の反対側に突出する接触片１１の弾発作用で維持される。
【００４４】
第２実施例のその他の点は、先の第１実施例と実質的に同じであるから、同一部材には同一符号を付して説明を省略する。第２実施例での係合片１２は弾性変形することを要しないが、係合片１２を断面Ｖ字状に折り曲げ形成し、係合片１２が第１実施例と同様に前後方向へ弾性変形するようにしてもよい。
【００４５】
端子板７の導出端部分９に左右一対の接触片１１・１１が設けられていると、回路基板５に対して導出端部分９、ひいては電池本体２をガタつくことなくバランスをとって支持固定するに有利である。しかし、本発明はこの実施形式に限られず、スルーホール１３内の導電部６に接触する接触片１１は１個でも３個以上であってもよい。
【００４６】
導出端部分９には、接触片１１が片持ち状にほぼ水平姿勢で折り曲げ連出されており、この接触片１１がスルーホール１３の上端開口周縁に設けた導電部６にばね性をもって弾性接触し、これのみにて導出端部分９と導電部６との導通性を図る形態でもよい。
【００４７】
本発明の係合片１２は、導出端部分９の左右幅方向の両端に設けられていてもよい。その場合は、左右の係合片１２・１２間に前記接触片１１が存在する形態を採ることができる。
【００４８】
（第３実施例）図７および図８は本発明の第３実施例を示す。図７（ａ）は、コイン形リチウム電池１の側面図、図７（ｂ）は、図７（ａ）のＣ−Ｃ縦断面図、図８は図７（ｂ）のＤ−Ｄ線断面図である。コイン形リチウム電池１は、電池本体２と、この電池本体２の正負極に溶接固定された端子板７・７とからなる。電池本体２は、上面に開口部を有する有底筒状の電池ケース３と、この開口部を密閉状に封する蓋部４とからなり、電池ケース３を正極とし、蓋部４を負極とする。
【００４９】
端子板７・７は、回路基板５に設けられた導電部６と電池本体２の正負極を電気的に接続するとともに、この電池本体２を回路基板５に対して遊動不能に固定保持する。各端子板７は、電池本体２の上下面に溶接固定されて前後水平方向に伸びる水平腕８と、水平腕８の遊端から下向きに折り曲げられた導出端部分９とが一体に形成された、側面視で略Ｌ字形のプレス成形品である。
【００５０】
図７および図８に示すように、導出端部分９は、水平腕８の折り返し部分から下方向に向かって片持ち状に連出される中央の接触片１１と、この接触片１１を挟むように下方向に向かって片持ち状に連出されて左右方向に弾性変形可能な一対の係合片１２・１２とからなる。そして、接触片１１および係合片１２が、回路基板５に設けられたスルーホール１３に差し込み装着されることにより、導出端部分９は、スルーホール１３の内壁面に形成された導電部６に接触して、導電部６と電池本体２の正負極を電気的に接続するとともに、回路基板５に抜け止め状に保持されて、電池本体２を遊動不能に固定保持する。
【００５１】
図８に示すように、スルーホール１３は、平面視で左右方向に長く、前後方向に短い略四角形状を呈しており、その内周面は上下の開口寸法が同一寸法のストレート状に形成されている。スルーホール１３の内周面の全面には、導電部６が形成されている。
【００５２】
図７および図８に示すごとく、接触片１１は、電池本体２側、すなわち後方向に膨出状に成形されて、前後方向に弾性変形可能な中央のばね板部１５と、前方向に膨出状に成形されて、前後方向に弾性変形可能な左右のばね板部１６・１６とからなる。これらのばね板部１５・１６は、上側の連出基端部１７と下側の連出端部１８との間で両持ち状に支持されている。ばね板部１５・１６の前後方向の対向間隔寸法は、スルーホール１３の前後方向の開口寸法よりも僅かに大きく設定されており、スルーホール１３内に差し込み装着されたとき、ばね板部１５・１６はスルーホール１３の前後壁に押圧状に接触する。
【００５３】
係合片１２は、上端部から下方向に向かって連出される基端部２０と、基端部２０の左右の外壁面が肉盗みされてなる薄肉部２１と、薄肉部２１の連出端に一体に設けられて左右外方向に突出する係止部２２とからなる。係止部２２の左右の外壁面は、上広がりのテーパー状のガイド面２３となっている。これら係合片１２・１２は、接触片１１の連出基端部１７の左右外側の離れた位置から延びており、係合片１２・１２の左右の内面とこれに対向する接触片１１の外面との間に、係合片１２・１２が接触片１１の方向へ弾性変形することを許す変形隙間Ｇが確保されている。すなわち、係合片１２と接触片１１とは僅かな隙間を介して近接対向しており、係合片１２は接触片１１と分離独立して左右方向に弾性変形できる。
【００５４】
図７（ｂ）に示すごとく、薄肉部２１の左右の外壁面どうしの間隔寸法は、スルーホール１３を形成する左右の内壁面の対向間隔寸法と略同等に設定されている。従って、係止部２２は、それの左右方向の薄肉部２１と比較した厚み分だけ、スルーホール１３の内壁面よりも左右外側に突出する。基端部２０と係止部２２との上下間隔寸法、すなわち薄肉部２１の上下寸法は、スルーホール１３の周縁における回路基板５の厚み寸法と略同等に設定されている。
【００５５】
端子板付き電池１の装着要領を説明する。まず、係止部２２のガイド面２３をスルーホール１３の左右内壁の上端に当接させながら、係合片１２をスルーホール１３内に差し込んでいくと、係合片１２はいったん変形隙間Ｇ方向に弾性変形する。そして、スルーホール１３に導出端部分９を完全に差し込み装着された図７（ｂ）の状態において、係合片１２の弾性復元力で係止部２２がスルーホール１３から左右方向に突出して、係止部２２がスルーホール１３の下端周縁に係る回路基板５に係合する。この係止部２２とスルーホール１３の下端周縁の回路基板５との係合により、スルーホール１３から端子板７が不用意に抜け出るのを阻止できる。すなわち、係合片１２がスルーホール１３の周縁に係る回路基板５に引っ掛かることにより、端子板７の上方への抜け止めが図られる。
【００５６】
また、係合片１２をスルーホール１３内に装着したとき、端子板７は薄肉部２１の上下長さの範囲内で上下方向の移動が規制される。具体的には、基端部２０の薄肉部２１との段差部分が、スルーホール１３の上端周縁の回路基板５で受け止められ、これにて端子板７は下方へ沈み込むことなくスルーホール１３内で確実に装着できる。また、係止部２２がスルーホール１３の下端周縁の回路基板５に係合していることで上方への抜け止めが図られている。かくして、端子板７が外部衝撃を受けてスルーホール１３から不用意に抜け外れたり、位置ズレしたりすることを確実に阻止できる。薄肉部２１の左右外側面が、スルーホール１３の左右方向の内壁面と当接することで、端子板７が左右方向に位置ズレすることもない。
【００５７】
加えて、係合片１２はこれ自体が弾性変形できるようにしてあるので、係止部２２をスルーホール１３内に先入れしたのちも、端子板７をスルーホール１３内に押し込むことにより、係止部２２はスルーホール１３の左右側面を滑り移動しながらスルーホール１３に貫通状に係合できる。従って、スルーホール１３に対する端子板付き電池１の装着作業が容易に行え、必要に応じて逆の手順で端子板付き電池１を簡単に取り外すことができる。すなわち、端子板付き電池１を回路基板５から離脱させる場合には、係合片１２の係止部２２を指先でつかんで、接触片１１の方向に撓み変形させて、該係止部２２の回路基板５に対する係合を解除してから、端子板７を上方向に持ち上げればよい。
【００５８】
また、スルーホール１３に端子板７を差し込んでいくと、接触片１１を構成するばね板部１５・１６が、その前後方向の対向間隔寸法が小さくなるように弾性変形する。そして、スルーホール１３に導出端部分９を完全に差し込み装着した図７（ａ）および図８の状態において、接触片１１は、ばね板部１５・１６の弾性復元力でスルーホール１３の前後方向の内壁面に押圧状に係合する。このばね板部１５・１６とスルーホール１３の内壁面との押圧係合により、端子板７と導電部６との電気的な導通が確保され、同時に前後方向の位置ズレを阻止できる。
【００５９】
本発明において、端子板の材質は、特に限定されるものではなく、鉄、銅、ニッケル、アルミニウム、チタンなどの金属材料やその合金（ステンレス鋼、真鍮など）、あるいは前記部材のクラッド板などのように複数の材質が複合化されたものなどを挙げることができる。さらに、前記部材の表面にニッケルメッキ、錫メッキ、ハンダメッキ、銅メッキ、金メッキなどのメッキを施したものであってもよい。ただし、電池の外装缶に端子板が溶接により取り付けられる場合は、外装缶との溶接性を考慮して端子板の材質を選択するのが望ましく、外装缶がステンレス鋼である場合は、端子板の材質はステンレス鋼あるいはニッケルであるのが好ましく、外装缶がアルミニウムあるいはその合金である場合は、端子板の材質もアルミニウムあるいはその合金を選択するのが好ましい。
【００６０】
【発明の効果】
以上みたとおり、本発明の端子板付き電池によれば、電池を電子機器の回路基板へ実装するにあたり、ハンダ付け処理をしなくても、電池本体の回路基板への取り付けが可能になる。とくに回路基板のスルーホールに端子板の導出端部分を圧入するだけで、回路基板に電池本体を導通状態に接続できるとともに、簡単かつ確実に支持固定できる。
【図面の簡単な説明】
【図１】本発明に係る端子板付き電池の第１実施例を示す縦断側面図
【図２】第１実施例の端子板を示す斜視図
【図３】図１におけるＡ−Ａ線断面図
【図４】図３におけるＢ−Ｂ線断面図
【図５】本発明に係る端子板付き電池の第２実施例を示す側面図
【図６】第２実施例の端子板を示す斜視図
【図７】本発明に係る端子板付き電池の第３実施例を示しており、図７（ａ）は縦断側面図、図７（ｂ）は図７（ａ）におけるＣ−Ｃ縦断面図
【図８】図７（ｂ）におけるＤ−Ｄ線断面図
【符号の説明】
１端子板付き電池
２電池本体
５回路基板
６導電部
７端子板
８水平腕
９導出端部分
１１接触片
１２係合片
１３スルーホール
１４ストッパー縁
２２係止部 [0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a battery with a terminal plate. More specifically, the present invention relates to a battery with a terminal plate that can be attached to a circuit board of an electronic device or the like without performing a soldering process.
[0002]
[Prior art]
  Flat batteries such as buttons and coins, or batteries such as prismatic and cylindrical are either alkaline dry batteries, lithium batteries, lithium secondary batteries, primary batteries represented by alkaline storage batteries, or secondary batteries. Widely used as a main power source and memory backup power source for various electronic devices.
[0003]
  When mounting the above battery on the circuit board of an electronic device, a terminal board that enables soldering to the circuit board is connected to the battery and the reflow furnace is used together with other electronic components in order to increase the efficiency of the manufacturing process. It is considered to solder the circuit board.
[0004]
  However, the battery is heated when passing through the reflow furnace, and although the temperature of the battery reaches a high temperature exceeding, for example, 150 ° C. for a short time, a physical change or a chemical change occurs in the battery components, and the battery This causes problems such as a decrease in sealing performance, a decrease in discharge characteristics, an internal short circuit, and a decrease in cycle characteristics. On the other hand, if only the battery is manually soldered separately from other electronic components to protect the battery, the work efficiency will be greatly reduced, so there will be no adverse effects on the battery characteristics even if it is passed through a reflow furnace. A battery having high heat resistance has been demanded. In particular, for lithium batteries using metallic lithium having a low melting point as a negative electrode and a highly volatile organic solvent as an electrolyte solvent, there has been a strong demand for technological development for heat resistance.
[0005]
  In response to such a demand, a battery using an additive that uses high heat-resistant packing or improves storage at high temperatures has been proposed (see Patent Documents 1 and 2). According to this, the heat resistance of the battery is increased, and a battery that does not hinder the passage of the reflow furnace can be obtained.
[0006]
  On the other hand, the battery mounting structure that fixed the battery on the circuit board and made it easy to replace and maintain the battery by stopping the fixing of the battery by soldering and sandwiching the circuit board between the battery body and the terminal board attached to it Has also been proposed (see Patent Document 3). According to this format, it is possible to mount the battery without soldering.
[0007]
[Patent Document 1]
          JP-A-8-153500 (paragraph numbers 0002-0008)
[Patent Document 2]
          JP 2000-323171 A (paragraph numbers 0005-0007)
[Patent Document 3]
          JP-A-10-64490 (paragraph numbers 0002-0005)
[0008]
[Problems to be solved by the invention]
  However, in the form of imparting heat resistance to the battery itself, if the battery packing is made of a material having high heat resistance in order to cope with the passage through the reflow furnace, the material cost is significantly increased compared to materials such as general-purpose polyolefin. . In addition, when an additive is included in the electrolytic solution, the discharge characteristics are deteriorated depending on the degree of difference, and thus usable electronic devices are limited. Even if an additive is added, it is necessary to use a material having high heat resistance to the other constituent members as well. In the first place, the use of solder for the conductive connection with the circuit board also has a problem of the environmental impact of lead contained in the solder, and in the current situation where reduction of solder usage is required from the viewpoint of environmental protection It is not preferable.
[0009]
  On the other hand, when using a mounting structure in which the circuit board is sandwiched between the battery main body and the terminal board attached to the battery body, the battery exterior body and the conductive part of the circuit board are in direct contact with each other, so the battery configuration at the time of mounting is limited. However, it becomes a bottleneck in terms of reducing the thickness of electronic devices and space saving. In addition, contact failure due to vibration is likely to occur, and there is a problem in terms of reliability.
[0010]
  Accordingly, an object of the present invention is to solve the above problems when mounting a battery on a circuit board such as an electronic device, and to connect the lead-out end portion of the terminal board led out from the battery body to the circuit board without performing soldering processing. An object of the present invention is to provide a battery with a terminal plate that can be easily and reliably attached by simply press-fitting into a conductive portion.
[0011]
[Means for Solving the Problems]
  As shown in FIGS. 1 to 8, the battery with a terminal plate of the present invention comprises a battery body 2 and the battery body. 2 is provided with two terminal plates 7 and 7 for electrically connecting 2 to the conductive portion 6 of the circuit board 5. The terminal plate 7 is welded and fixed to the negative and positive electrodes on the upper and lower surfaces of the battery body 2 and extends in the horizontal direction. The terminal plate 7 is bent downward from the extending end of the horizontal arm 8, and is electrically conductive. Lead-out end portion press-fitted into through hole 13 provided in portion 6 9 Including. The lead-out end portion 9 has a contact piece 11 that contacts the conductive portion 6 facing the through hole 13. The contact piece 11 is formed in the middle in the vertical direction of the lead-out end portion 9 so as to be elastically deformable so as to protrude in the front-rear thickness direction of the lead-out end portion 9, and by the elastic restoring force of the contact piece 11 The contact piece 11 is configured to be in pressure contact with the conductive portion 6.
  The battery body 2 is preferably a flat battery such as a button or coin.
  According to this, by simply press-fitting the lead-out end portion 9 into the through-hole 13, the contact piece 11 is pressed into contact with the conductive portion 6 in the through-hole 13, so that conductivity is achieved and the lead-out portion 9 is derived with the corresponding press-contact force. The end portion 9 can be securely supported and fixed to the conductive portion 6 of the circuit board 5 in a retaining manner.
  Further, when the contact piece 11 is in pressure contact with the conductive portion 6 with an elastic restoring force, good conductivity between the contact piece 11 and the conductive portion 6 is ensured, and the battery body 2 is not rattled to the circuit board 5. It can be stably supported and fixed.
[0012]
  Further, as shown in FIGS. 1 to 4, the battery with a terminal of the present invention includes a battery body 2 and two terminal plates 7 for electrically connecting the battery body 2 to the conductive portion 6 of the circuit board 5. 7. The terminal plate 7 is welded and fixed to the negative and positive electrodes on the upper and lower surfaces of the battery body 2 and extends in the horizontal direction. The terminal plate 7 is bent downward from the extending end of the horizontal arm 8, and is electrically conductive. And a lead-out end portion 9 press-fitted into a through hole 13 provided in the portion 6. A contact piece 11 that contacts the conductive portion 6 is formed on the lead-out end portion 9 so as to be elastically deformable so as to protrude in the front-rear thickness direction of the lead-out end portion 9, and upper and lower ends of the contact piece 11 are The lead-out end portion 9 is connected to the lead-out end portion 9 in a doubly-supported beam shape, and the contact piece 11 is configured to be in pressure contact with the conductive portion 6 by the elastic restoring force of the contact piece 11.
  The battery body 2 is preferably a flat battery such as a button or coin.
  According to this, by simply press-fitting the lead-out end portion 9 into the through-hole 13, the contact piece 11 is pressed into contact with the conductive portion 6 in the through-hole 13, so that conductivity is achieved and the lead-out portion 9 is derived with the corresponding press-contact force. The end portion 9 can be securely supported and fixed to the conductive portion 6 of the circuit board 5 in a retaining manner.
  Further, when the contact piece 11 is in pressure contact with the conductive portion 6 with an elastic restoring force, good conductivity between the contact piece 11 and the conductive portion 6 is ensured, and the battery body 2 is not rattled to the circuit board 5. It can be stably supported and fixed.
  Thus, when the contact piece 11 is formed in a doubly-supported beam shape, it is possible to effectively ensure the elastic restoring force of the contact piece 11 and consequently the pressure contact force against the conductive portion 6 in the through hole 13.
[0013]
  Further, as shown in FIGS. 5 and 6, the battery with a terminal of the present invention includes a battery main body 2 and two terminal plates 7 for electrically connecting the battery main body 2 to the conductive portion 6 of the circuit board 5. 7. The terminal plate 7 is welded and fixed to the negative and positive electrodes on the upper and lower surfaces of the battery body 2 and extends in the horizontal direction. The terminal plate 7 is bent downward from the extending end of the horizontal arm 8, and is electrically conductive. And a lead-out end portion 9 press-fitted into a through hole 13 provided in the portion 6. A contact piece 11 that contacts the conductive portion 6 is formed in the lead-out end portion 9 so as to be elastically deformable so as to protrude in the front-rear thickness direction of the lead-out end portion 9. Is connected to the lead-out end portion 9 in a cantilevered manner, and the upper end protrudes in a direction away from the lead-out end portion 9, and the contact piece 11 is connected to the conductive portion 6 by the elastic restoring force of the contact piece 11. It is comprised so that it may press-contact.
  The battery body 2 is preferably a flat battery such as a button or coin.
  According to this, by simply press-fitting the lead-out end portion 9 into the through-hole 13, the contact piece 11 is pressed into contact with the conductive portion 6 in the through-hole 13, so that conductivity is achieved and the lead-out portion 9 is derived with the corresponding press-contact force. The end portion 9 can be securely supported and fixed to the conductive portion 6 of the circuit board 5 in a retaining manner.
  Further, when the contact piece 11 is in pressure contact with the conductive portion 6 with an elastic restoring force, the contact piece 11 and the conductive portion 6 The battery body 2 can be stably supported and fixed to the circuit board 5 without rattling.
[0014]
  Further, as shown in FIGS. 7 and 8, the battery with a terminal of the present invention includes a battery body 2 and two terminal plates 7 for electrically connecting the battery body 2 to the conductive portion 6 of the circuit board 5. 7. The terminal plate 7 is welded and fixed to the negative and positive electrodes on the upper and lower surfaces of the battery body 2 and extends in the horizontal direction. The terminal plate 7 is bent downward from the extending end of the horizontal arm 8, and is electrically conductive. And a lead-out end portion 9 press-fitted into a through hole 13 provided in the portion 6. A contact piece 11 that contacts the conductive portion 6 is formed on the lead-out end portion 9 so as to be elastically deformable so as to protrude in the front-rear thickness direction of the lead-out end portion 9, and upper and lower ends of the contact piece 11 are A central spring plate portion that is connected to the lead-out end portion 9 in a doubly-supported beam shape, and that the contact piece 11 is formed in one of the lead-out end portions 9 in the front-rear thickness direction and is elastically deformable in the front-rear thickness direction. 15 and the left and right spring plate portions 16, 16 that are formed on the other side in the front-rear thickness direction of the lead-out end portion 9 on both outer sides in the left-right width direction of the center spring plate portion 15 and can be elastically deformed in the front-rear thickness direction. The contact piece 11 is configured to be in pressure contact with the conductive portion 6 by the elastic restoring force of the contact piece 11.
  The battery body 2 is preferably a flat battery such as a button or coin.
  According to this, by simply press-fitting the lead-out end portion 9 into the through-hole 13, the contact piece 11 is pressed into contact with the conductive portion 6 in the through-hole 13, so that conductivity is achieved and the lead-out portion 9 is derived with the corresponding press-contact force. The end portion 9 can be securely supported and fixed to the conductive portion 6 of the circuit board 5 in a retaining manner.
  Further, when the contact piece 11 is in pressure contact with the conductive portion 6 with an elastic restoring force, good conductivity between the contact piece 11 and the conductive portion 6 is ensured, and the battery body 2 is not rattled to the circuit board 5. It can be stably supported and fixed.
  Thus, when the contact piece 11 is formed in a doubly-supported beam shape, it is possible to effectively ensure the elastic restoring force of the contact piece 11 and consequently the pressure contact force against the conductive portion 6 in the through hole 13.
[0015]
  As shown in FIGS. 1 to 8, the lead-out end portion 9 can be formed with an engagement piece 12 that engages the through hole 13 in a retaining manner.
  According to this, the contact piece 11 plays a role of achieving electrical connection between the lead-out end portion 9 and the conductive portion 6, and the engagement piece 12 plays a role of firmly supporting and fixing the lead-out end portion 9 to the through hole 13.
[0016]
  As shown in FIGS. 1 to 4, the lead-out end portion 9 is formed with an engagement piece 12 that engages with the through-hole 13 in a retaining manner. The vertical and vertically long contact pieces 11 and 11 having a vertical length larger than the left and right width dimensions are formed, and the lead-out end portion 9 is provided below the left and right contact pieces 11 and 11. It is possible to adopt a form in which the vertically long engagement piece 12 is formed.
[0017]
  As shown in FIG. 1 to FIG. 4, the engagement piece 12 is formed in the lead-out end portion 9 so as to be elastically deformable so as to protrude in the thickness direction of the lead-out end portion 9. The tip of the piece 12 is connected to the lower end of the lead-out end portion 9, and the upper surface protrudes in a free state in a direction away from the lead-out end portion 9, and the engagement piece 12 itself is elastically deformed. By doing so, it is possible to adopt a configuration in which the through hole 13 can be press-fitted from above.
[0018]
  As shown in FIGS. 5 and 6, the lead-out end portion 9 is formed with an engagement piece 12 that engages the through-hole 13 in a retaining manner. It is possible to adopt a form in which the engagement piece 12 is folded upward between the contact pieces 11..
[0019]
  As shown in FIG. 1 to FIG. The portion 6 is formed so as to project, and the upper end of the engagement piece 12 can be received by the projecting portion of the conductive portion 6.
  According to this, the continuity between the lead-out end portion 9 and the conductive portion 6 becomes more reliable.
[0020]
  As shown in FIG. 1 to FIG. 6, the lead-out end portion 9 can take a form in which the contact piece 11 protrudes on one side in the front-rear thickness direction and the engagement piece 12 protrudes on the other side. .
[0021]
  As shown in FIGS. 7 and 8, the lead-out end portion 9 is formed with an engagement piece 12 that engages the through-hole 13 in a retaining manner, and the lead-out end portion 9 is arranged in the left-right width direction. The contact piece 11 disposed in the center and the engagement pieces 12 disposed on both sides of the contact piece 11 in the left-right width direction are configured to be elastically deformable in the left-right width direction. It can take the form which is done.
[0022]
  As shown in FIGS. 7 and 8, the engaging piece 12 may be in contact with the conductive portion 6 facing the through hole 13.
[0023]
  As shown in FIGS. 7 and 8, the engagement piece 12 is continuously extended downward in a cantilevered manner, at the lower end of the engagement piece 12, and at the opening periphery of the lower end of the through hole 13. The form in which the latching | locking part 22 to be hooked was formed can be taken.
  According to this, it is possible to well prevent the lead-out end portion 9 inserted into the through hole 13 from being pulled upward.
[0024]
  As shown in FIGS. 1 to 8, it is possible to adopt a form in which stopper edges 14 and 14 that are received by the opening edge of the upper end of the through hole 13 are formed at both ends in the left-right width direction of the lead-out end portion 9. .
  According to this, the lead-out end portion 98 may be press-fitted into the through-hole 13 until the stopper edges 14 and 14 are received by the opening edge of the upper end of the through-hole 13, and the lead-out end portion 9 is always placed in the through-hole 13. Can be inserted without excess or deficiency. In addition, the stopper edges 14 and 14 also contribute to stably supporting the battery body 2 on the circuit board 5.
[0025]
First Embodiment FIGS. 1 to 4 show a first embodiment of the present invention, in which a coin-type lithium battery is used as a flat battery 1. The battery 1 includes two terminal plates 7 and 7 in one battery body 2. The base end portions of the terminal plates 7 and 7 are fixed to the upper and lower positive and negative electrodes of the battery body 2 by welding.
[0026]
  The battery body 2 includes a bottomed cylindrical battery case 3 having an opening on the upper surface and a lid 4 that seals the opening in a sealed manner. The battery case 3 serves as a positive electrode, and the lid 4 serves as a negative electrode. Yes.
[0027]
  The terminal plates 7 and 7 electrically connect the two conductive portions 6 and 6 provided on the circuit board 5 to the upper and lower positive and negative electrodes of the battery body 2, and connect the battery body 2 to the circuit. It has a function of fixing and holding the substrate 5 so that it cannot move freely. The battery body 2 is arranged on the circuit board 5 in a state of being slightly lifted away via both terminal plates 7 and 7.
[0028]
  Each terminal plate 7 is welded and fixed to the negative and positive electrodes on the upper and lower surfaces of the battery body 2 and extends horizontally in the front and rear direction, and a lead-out end bent downward from the extending end of the horizontal arm 8. It is a substantially L-shaped press-formed product in a side view in which the portion 9 is integrally formed. Note that the terminal plate 7 connected to the positive electrode of the battery body 2 once lifts the extending end of the horizontal arm 8 upward, and then the downward leading end portion 9 is connected to the extending end of the horizontal arm 8.
[0029]
  A pair of contact pieces 11, 11 are formed on the lead-out end portion 9 of each terminal plate 7 so as to be elastically deformable so as to protrude in the front-rear thickness direction of the lead-out end portion 9.
[0030]
  Each contact piece 11 is formed in a vertically long shape having a predetermined left and right width, and upper and lower ends are connected to the lead-out end portion 9 in a doubly-supported beam shape. In particular, an upwardly inclined guide portion 11a is bent at the lower end portion of the contact piece 11, and an upper end portion 11b of the contact piece 11 is also bent downwardly.
[0031]
  Further, at the lead-out end portion 9 of each terminal plate 7, an engagement piece 12 that can be elastically deformed downward between the left and right contact pieces 11, 11 is cut upward to project in the front-rear thickness direction of the lead-out end portion 9. Is formed.
[0032]
  The engagement piece 12 is formed to be vertically narrow with a small left and right width, and a lower end thereof is connected to the lead-out end portion 9 in a cantilevered manner. The engagement piece 12 is formed in a shape in which the lower end portion 12a rises obliquely upward, and the upper end portion 12b is formed in a vertically upward shape.
[0033]
  The contact piece 11 and the engagement piece 12 have a relationship in which the engagement piece 12 protrudes to the other of the lead-out end portions 9 when the contact piece 11 protrudes in one of the front and rear thickness directions.
[0034]
  A through hole 13 is provided in the conductive portion 6 of the circuit board 5 in a vertically penetrating manner. That is, the inner peripheral surface of the through hole 13 is the conductive portion 6. Conductive portions 6 are formed so as to project from the opening periphery of the upper and lower ends of the through hole 13. Reference numeral 6 c is a protruding portion of the conductive portion 6. The through-hole 13 has a substantially rectangular shape that is long in the left-right direction and short in the front-rear direction in plan view.
[0035]
  Next, the installation procedure of the battery 1 with the terminal board to the circuit board 5 will be described. The lead-out end portions 9 of the terminal boards 7 integrated with the battery body 2 are press-fitted into the through holes 13 of the circuit board 5 from above. To do. At this time, the contact piece 11 is smoothly fitted and guided into the through hole 13 by the inclined lower end guide portion 11a, and the engagement piece 12 is also smoothly fitted and guided into the through hole 13 by the inclined lower end portion 12a. The contact piece 11 and the engagement piece 12 are in contact with the inner surfaces of the front and rear conductive portions 6 in the through hole 13 and elastically deformed toward the lead-out end portion 9 side, respectively.
[0036]
  Stopper edges 14 and 14 for restricting the insertion limit of the lead-out end portion 9 with respect to the through hole 13 are formed in steps on both ends in the left-right width direction of the lead-out end portion 9. Accordingly, the lead-out end portion 9 is completely press-fitted into the through hole 13 until the stopper edges 14 and 14 are received at the opening periphery of the upper end thereof.
[0037]
  When the lead-out end portion 9 is completely press-fitted into the through hole 13, the upper end of the engagement piece 12 comes out below the through hole 13 and is elastically restored to the original protruding state, and the upper end of the engagement piece 12 is the lower end of the through hole 13. It is received by the opening periphery of the.
[0038]
  Since the protruding portion 6 c of the conductive portion 6 is formed at the opening periphery of the lower end of the through hole 13, the upper end of the engagement piece 12 is received by the protruding portion 6 c of the conductive portion 6. This restricts the lead-out end portion 9 from coming out above the through hole 13.
[0039]
  In a state in which the lead-out end portion 9 is press-fitted into the through hole 13, each of the pair of left and right contact pieces 11 is elastically deformed, so that an intermediate flatness between the upper and lower end portions 11a and 11b of the contact piece 11 is caused by its elastic restoring force. The portion 11 c is in full pressure contact with the conductive portion 6 facing the through hole 13.
[0040]
  In particular, since the contact piece 11 is formed in a doubly-supported beam shape whose upper and lower ends are connected to the lead-out end portion 9, the pressure contact force of the contact piece 11 with respect to the conductive portion 6 in the through hole 13 becomes strong. Therefore, even with only this pressure contact force, the lead-out end portion 9 can be reliably held and fixed without rattling with respect to the through-hole 13 and without inadvertently shifting in the vertical direction. In addition, the lead-out end portion 9 of each terminal board 7 is electrically connected to the conductive portion 6 of the circuit board 5 by the contact pieces 11 and 11. The stopper edges 14 and 14 and the upper ends of the engagement pieces 12 also assist the conduction state.
[0041]
  When it is necessary to remove the battery 1 with a terminal plate from the circuit board 5, the engagement piece 12 is bent and deformed toward the lead-out end portion 9 of the terminal plate 7 by grasping the upper end of the engagement piece 12 with a fingertip or the like. What is necessary is just to guide | lead the upper end of 12 in the through-hole 13, and pull up the derivation | leading-out end part 9 as it is.
[0042]
Second Embodiment FIGS. 5 and 6 show a second embodiment of the present invention corresponding to the ninth aspect. In the second embodiment, the left and right contact pieces 11 are cut and raised from the lead-out end portion 9 of the terminal board 7. That is, the lower end of each contact piece 11 is connected to the lead-out end portion 9 in a cantilevered manner, and the upper end side protrudes away from the lead-out end portion 9. According to this, when the lead-out end portion 9 is press-fitted into the through-hole 13 from above, the contact piece 11 is elastically deformed toward the lead-out end portion 9 and the upper end portion of the contact piece 11 is made through-hole by the elastic restoring force. 13 is pressed against the conductive portion 6 before and after facing 13.
[0043]
  Further, at the lower end of the lead-out end portion 9 of each terminal board 7, an engagement piece 12 is formed to be turned upward between the left and right contact pieces 11. According to this, in a state where the lead-out end portion 9 is completely press-fitted into the through hole 13, the upper end of the engagement piece 12 comes out of the through hole 13, and the opening periphery at the lower end thereof (the protruding portion 6 c of the conductive portion 6). ). This state is maintained by the elastic action of the contact piece 11 protruding to the opposite side of the engagement piece 12.
[0044]
  Since the other points of the second embodiment are substantially the same as those of the first embodiment, the same members are denoted by the same reference numerals and description thereof is omitted. The engagement piece 12 in the second embodiment does not need to be elastically deformed, but the engagement piece 12 is bent in a V-shaped cross section, and the engagement piece 12 is elastic in the front-rear direction as in the first embodiment. You may make it deform | transform.
[0045]
  When the lead-out end portion 9 of the terminal board 7 is provided with a pair of left and right contact pieces 11, 11, the lead-out end portion 9 and thus the battery body 2 are balanced and supported with respect to the circuit board 5 without rattling. This is advantageous. However, the present invention is not limited to this embodiment, and the number of the contact pieces 11 that contact the conductive portion 6 in the through hole 13 may be one or three or more.
[0046]
  A contact piece 11 is bent and extended in a substantially horizontal posture in a cantilevered manner at the lead-out end portion 9, and this contact piece 11 is elastically contacted with a conductive property 6 provided at the periphery of the upper end opening of the through hole 13 with springiness. However, it is also possible to adopt a form in which only the continuity between the lead-out end portion 9 and the conductive portion 6 is achieved.
[0047]
  The engagement piece 12 of the present invention may be provided at both ends of the leading end portion 9 in the left-right width direction. In that case, the form which the said contact piece 11 exists between the left and right engaging pieces 12 * 12 can be taken.
[0048]
(Third Embodiment) FIGS. 7 and 8 show a third embodiment of the present invention. 7A is a side view of the coin-type lithium battery 1, FIG. 7B is a longitudinal cross-sectional view taken along the line CC in FIG. 7A, and FIG. 8 is a cross-sectional view taken along the line DD in FIG. FIG. The coin-type lithium battery 1 includes a battery main body 2 and terminal plates 7 and 7 fixed to the positive and negative electrodes of the battery main body 2 by welding. The battery body 2 includes a bottomed cylindrical battery case 3 having an opening on the upper surface and a lid 4 that seals the opening in a sealed manner. The battery case 3 is a positive electrode, and the lid 4 is a negative electrode. To do.
[0049]
  The terminal plates 7 and 7 electrically connect the conductive portion 6 provided on the circuit board 5 to the positive and negative electrodes of the battery body 2, and fix and hold the battery body 2 to the circuit board 5 so as not to move freely. Each terminal plate 7 is integrally formed with a horizontal arm 8 that is welded and fixed to the upper and lower surfaces of the battery body 2 and extends in the front-rear horizontal direction, and a lead-out end portion 9 that is bent downward from the free end of the horizontal arm 8. It is a press-formed product having a substantially L shape in a side view.
[0050]
  As shown in FIG. 7 and FIG. 8, the lead-out end portion 9 sandwiches the contact piece 11 between the center contact piece 11 that is led out in a cantilevered manner downward from the folded portion of the horizontal arm 8. It consists of a pair of engaging pieces 12 and 12 which are continuously extended in a cantilevered direction and can be elastically deformed in the left-right direction. The contact piece 11 and the engagement piece 12 are inserted into and attached to the through hole 13 provided in the circuit board 5, so that the lead-out end portion 9 is connected to the conductive portion 6 formed on the inner wall surface of the through hole 13. The conductive portion 6 and the positive and negative electrodes of the battery main body 2 are electrically connected to each other, and are held on the circuit board 5 so as to prevent the battery main body 2 from being loosely fixed.
[0051]
  As shown in FIG. 8, the through-hole 13 has a substantially rectangular shape that is long in the left-right direction and short in the front-rear direction in plan view, and the inner peripheral surface thereof is formed in a straight shape having the same upper and lower opening dimensions. ing. A conductive portion 6 is formed on the entire inner peripheral surface of the through hole 13.
[0052]
  As shown in FIGS. 7 and 8, the contact piece 11 is formed in a bulging shape on the battery body 2 side, that is, in the rearward direction, and has a central spring plate portion 15 that can be elastically deformed in the front-rear direction, and a front bulge. The left and right spring plate portions 16 and 16 are formed in a protruding shape and elastically deformable in the front-rear direction. These spring plate portions 15 and 16 are supported in a cantilevered manner between the upper continuous base end 17 and the lower continuous end 18. The distance between the front and rear direction of the spring plate portions 15 and 16 is set to be slightly larger than the opening size of the through hole 13 in the front and rear direction. 16 contacts the front and rear walls of the through hole 13 in a pressing manner.
[0053]
  The engagement piece 12 includes a base end portion 20 extending downward from the upper end portion, a thin portion 21 in which the left and right outer wall surfaces of the base end portion 20 are stealed, and a continuous end of the thin portion 21. Is provided in one piece and protrudes left and rightLocking part22.Locking partThe left and right outer wall surfaces 22 are tapered guide surfaces 23 that spread upward. These engagement pieces 12 and 12 extend from positions on the left and right outer sides of the continuous base end portion 17 of the contact piece 11, and the left and right inner surfaces of the engagement pieces 12 and 12 and the contact piece 11 facing the engagement pieces 12 and 12. Between the outer surface, a deformation gap G that allows the engaging pieces 12 and 12 to elastically deform in the direction of the contact piece 11 is secured. That is, the engagement piece 12 and the contact piece 11 are closely opposed to each other with a slight gap, and the engagement piece 12 can be elastically deformed in the left-right direction separately from the contact piece 11.
[0054]
  As shown in FIG. 7B, the distance between the left and right outer wall surfaces of the thin portion 21 is set to be approximately equal to the distance between the left and right inner wall surfaces that form the through hole 13. Therefore,Locking part22 protrudes from the inner wall surface of the through-hole 13 to the left and right outside by the thickness compared with the thin portion 21 in the left-right direction. The proximal end 20 andLocking partThe vertical dimension with respect to 22, that is, the vertical dimension of the thin portion 21 is set substantially equal to the thickness dimension of the circuit board 5 at the periphery of the through hole 13.
[0055]
  The installation procedure of the battery 1 with a terminal board is demonstrated. First,Locking partWhen the engagement piece 12 is inserted into the through hole 13 while the guide surface 23 of 22 is brought into contact with the upper ends of the left and right inner walls of the through hole 13, the engagement piece 12 is once elastically deformed in the direction of the deformation gap G. Then, in the state of FIG. 7B in which the lead-out end portion 9 is completely inserted and attached to the through hole 13, the elastic restoring force of the engagement piece 12 is used.Locking part22 protrudes from the through hole 13 in the left-right direction,Locking part22 engages with the circuit board 5 associated with the lower edge of the through hole 13. thisLocking partThe terminal plate 7 can be prevented from inadvertently coming out of the through-hole 13 by the engagement between the through-hole 13 and the circuit board 5 at the lower peripheral edge of the through-hole 13. That is, when the engagement piece 12 is caught by the circuit board 5 on the periphery of the through hole 13, the terminal plate 7 is prevented from coming off upward.
[0056]
  Further, when the engagement piece 12 is mounted in the through hole 13, the terminal plate 7 is restricted from moving in the vertical direction within the range of the vertical length of the thin portion 21. Specifically, the step portion of the base end portion 20 with respect to the thin portion 21 is received by the circuit board 5 at the peripheral edge of the upper end of the through hole 13, so that the terminal board 7 does not sink downward and is inside the through hole 13. Can be installed securely. Also,Locking partSince 22 is engaged with the circuit board 5 at the peripheral edge of the lower end of the through hole 13, it is prevented from coming off upward. Thus, it is possible to reliably prevent the terminal board 7 from being accidentally detached from the through hole 13 due to an external impact or being displaced. Since the left and right outer surfaces of the thin portion 21 are in contact with the inner wall surface of the through hole 13 in the left and right direction, the terminal plate 7 is not displaced in the left and right direction.
[0057]
  In addition, since the engagement piece 12 itself can be elastically deformed,Locking partAfter inserting 22 into the through hole 13, by pushing the terminal board 7 into the through hole 13,Locking part22 can engage with the through hole 13 in a penetrating manner while sliding along the left and right side surfaces of the through hole 13. Therefore, the attachment work of the battery 1 with a terminal plate to the through hole 13 can be easily performed, and the battery 1 with a terminal board can be easily removed by the reverse procedure as necessary. That is, when the battery 1 with terminal plate is detached from the circuit board 5,Locking part22 is grasped with a fingertip, bent in the direction of the contact piece 11 and deformed.Locking partThe terminal board 7 may be lifted upward after releasing the engagement of 22 with the circuit board 5.
[0058]
  Further, when the terminal plate 7 is inserted into the through hole 13, the spring plate portions 15 and 16 constituting the contact piece 11 are elastically deformed so that the opposing space dimension in the front-rear direction becomes small. In the state shown in FIGS. 7A and 8 in which the lead-out end portion 9 is completely inserted and attached to the through hole 13, the contact piece 11 is moved in the front-rear direction of the through hole 13 by the elastic restoring force of the spring plate portions 15 and 16. It engages with the inner wall surface in a pressing manner. By the press engagement between the spring plate portions 15 and 16 and the inner wall surface of the through hole 13, electrical connection between the terminal plate 7 and the conductive portion 6 is ensured, and at the same time, displacement in the front-rear direction can be prevented.
[0059]
  In the present invention, the material of the terminal plate is not particularly limited, and a metal material such as iron, copper, nickel, aluminum, titanium or an alloy thereof (stainless steel, brass, etc.), or a clad plate of the member. Thus, there can be mentioned a composite of a plurality of materials. Further, the surface of the member may be plated with nickel plating, tin plating, solder plating, copper plating, gold plating or the like. However, when the terminal plate is attached to the battery outer can by welding, it is desirable to select the material of the terminal plate in consideration of the weldability with the outer can. When the outer can is made of stainless steel, the terminal plate The material is preferably stainless steel or nickel. When the outer can is made of aluminum or an alloy thereof, the material of the terminal plate is preferably selected from aluminum or an alloy thereof.
[0060]
【The invention's effect】
  As described above, according to the battery with a terminal plate of the present invention, the battery body can be attached to the circuit board without performing the soldering process when the battery is mounted on the circuit board of the electronic device. In particular, the battery body can be connected to the circuit board in a conductive state by simply press-fitting the lead-out end portion of the terminal board into the through hole of the circuit board, and can be supported and fixed easily and reliably.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view showing a first embodiment of a battery with a terminal plate according to the present invention.
FIG. 2 is a perspective view showing a terminal board of the first embodiment.
3 is a cross-sectional view taken along line AA in FIG.
4 is a sectional view taken along line BB in FIG.
FIG. 5 is a side view showing a second embodiment of a battery with a terminal plate according to the present invention.
FIG. 6 is a perspective view showing a terminal board of a second embodiment.
7 shows a third embodiment of a battery with a terminal plate according to the present invention, FIG. 7 (a) is a longitudinal side view, and FIG. 7 (b) is a CC longitudinal sectional view in FIG. 7 (a).
FIG. 8 is a cross-sectional view taken along line DD in FIG.Figure
[Explanation of symbols]
  1 Battery with terminal plate
  2 Battery body
  5 Circuit board
  6 Conductive part
  7 Terminal board
  8 horizontal arms
  9 Leading end
  11 Contact piece
  12 Engagement piece
  13 Through hole
  14 Stopper edge
  22 Locking part

Claims

A battery body, and two terminal plates for electrically connecting the battery body to the conductive portion of the circuit board,
The terminal plate is fixed to the negative and positive electrodes on the upper and lower surfaces of the battery body by welding and extending horizontally, and is bent downward from the extending end of the horizontal arm to be provided on the conductive portion. Including a lead-out end portion press-fitted into the through hole,
The lead-out end portion has a contact piece that contacts the conductive portion facing the through hole,
The contact piece is formed to be elastically deformable so as to protrude in the front-rear thickness direction of the lead-out end portion in the middle in the vertical direction of the lead-out end portion,
A battery with a terminal plate , wherein the contact piece is configured to be pressed against the conductive portion by an elastic restoring force of the contact piece .

A battery body, and two terminal plates for electrically connecting the battery body to the conductive portion of the circuit board,
The terminal plate is fixed to the negative and positive electrodes on the upper and lower surfaces of the battery body by welding and extending horizontally, and is bent downward from the extending end of the horizontal arm to be provided on the conductive portion. Including a lead-out end portion press-fitted into the through hole,
A contact piece that contacts the conductive portion is formed on the lead-out end portion so as to be elastically deformable so as to protrude in the front-rear thickness direction of the lead-out end portion,
The upper and lower ends of the contact piece are connected to the lead-out end portion in a doubly-supported beam shape,
A battery with a terminal plate , wherein the contact piece is configured to be pressed against the conductive portion by an elastic restoring force of the contact piece .

A battery body, and two terminal plates for electrically connecting the battery body to the conductive portion of the circuit board,
The terminal plate is fixed to the negative and positive electrodes on the upper and lower surfaces of the battery body by welding and extending horizontally, and is bent downward from the extending end of the horizontal arm to be provided on the conductive portion. Including a lead-out end portion press-fitted into the through hole,
In the lead-out end portion, a contact piece that contacts the conductive portion is formed to be elastically deformable so as to protrude in the front-rear thickness direction of the lead-out end portion,
The lower end of the contact piece is connected to the lead-out end portion in a cantilevered manner, and the upper end side protrudes in a direction away from the lead-out end portion,
A battery with a terminal plate , wherein the contact piece is configured to be pressed against the conductive portion by an elastic restoring force of the contact piece .

A battery body, and two terminal plates for electrically connecting the battery body to the conductive portion of the circuit board,
The terminal plate is fixed to the negative and positive electrodes on the upper and lower surfaces of the battery body by welding and extending horizontally, and is bent downward from the extending end of the horizontal arm to be provided on the conductive portion. Including a lead-out end portion press-fitted into the through hole,
A contact piece that contacts the conductive portion is formed on the lead-out end portion so as to be elastically deformable so as to protrude in the front-rear thickness direction of the lead-out end portion,
The upper and lower ends of the contact piece are connected to the lead-out end portion in a doubly-supported beam shape,
The contact piece is stamped and formed on one side in the front-rear thickness direction of the lead-out end portion and is elastically deformable in the front-rear thickness direction, and on both outer sides in the left-right width direction of the central spring plate part Including left and right spring plate portions that are formed on the other side in the front-rear thickness direction of the lead-out end portion and elastically deformable in the front-rear thickness direction,
A battery with a terminal plate , wherein the contact piece is configured to be pressed against the conductive portion by an elastic restoring force of the contact piece .

The battery with a terminal plate according to claim 1, 2, 3, or 4, wherein an engagement piece that engages with the through hole in a retaining manner is formed at the lead-out end portion .

In the lead-out end portion, an engagement piece that is engaged with the through hole in a retaining shape is formed,
On the left and right in the width direction of the lead-out end portion, the contact piece that is vertically long and vertically longer than the width dimension on the left and right is formed,
The battery with a terminal plate according to claim 2, wherein the vertically extending engagement piece is formed below the left and right contact pieces at the lead-out end portion .

In the lead-out end portion, the engagement piece is formed to be elastically deformable so as to protrude in the front-rear thickness direction of the lead-out end portion,
The engagement piece has a tip connected to the lower end of the lead-out end portion, and the upper surface side protrudes in a free state in a direction away from the lead-out end portion,
The battery with a terminal plate according to claim 6 , wherein the engagement piece is configured to be press-fitted into the through hole from above by being elastically deformed.

In the lead-out end portion, an engagement piece that is engaged with the through hole in a retaining shape is formed,
The battery with a terminal plate according to claim 3 , wherein the engagement piece is folded upward between the left and right contact pieces at a lower end of the lead-out end portion .

In the opening periphery of the lower end of the through hole, the conductive portion is formed to protrude,
The battery with a terminal plate according to any one of claims 5 to 8, wherein an upper end of the engagement piece is received by a protruding portion of the conductive portion .

The battery with a terminal according to any one of claims 5 to 9, wherein the lead-out end portion projects the contact piece on one side in the front-rear thickness direction and the engagement piece on the other side .

In the lead-out end portion, an engagement piece that is engaged with the through hole in a retaining shape is formed,
The lead-out end portion includes the contact piece disposed in the center in the left-right width direction, and the engagement pieces disposed on both sides in the left-right width direction of the contact piece,
The battery with a terminal according to claim 4 , wherein the engagement piece is configured to be elastically deformable in a lateral width direction .

The battery with a terminal according to claim 11 , wherein the engagement piece is in contact with the conductive portion facing the through hole .

The engaging piece is continuously extended in a cantilevered downward direction,
The battery with a terminal according to claim 11 or 12 , wherein a locking portion is formed at a lower end of the engagement piece so as to be hooked on an opening peripheral edge of the lower end of the through hole .

The battery with a terminal according to any one of claims 1 to 13 , wherein stopper edges that are received by an opening peripheral edge of an upper end of the through hole are formed at both ends in the left-right width direction of the lead-out end portion .