JP3938754B2

JP3938754B2 - Fixture

Info

Publication number: JP3938754B2
Application number: JP2003072332A
Authority: JP
Inventors: 保市竹内
Original assignee: TAKEUCHI PACKAGE CO., LTD.
Current assignee: TAKEUCHI PACKAGE CO., LTD.
Priority date: 2003-03-17
Filing date: 2003-03-17
Publication date: 2007-06-27
Anticipated expiration: 2023-03-17
Also published as: JP2004278703A

Description

【０００１】
【発明の属する技術分野】
本発明は電子機器等のシャーシに電子部品やケーブル等を実装するために用いる固定具に関し、特にシャーシの表面側からの取り外しを容易に行うことが可能な固定具に関するものである。
【０００２】
【従来の技術】
電子機器を組み立てる場合には、パネル、シャーシ、基板等の組立基板（以下、これらをシャーシと称する）に電子部品を取り付けたり、ケーブル等の配線部品を延設配置する必要があり、そのために実装用部品が用いられる。例えば、シャーシの表面に沿って複数本のケーブルを並列状態に延設配置する場合には、複数本のケーブルを結束した状態でシャーシへの取着を行うケーブルタイが用いられる。従来のケーブルタイの一例を図１２に示す。ケーブルタイ１Ｃは、複数本のケーブルを結束するために他端が自由端とされたバンド部１１と、前記バンド部１１の基端が連結され、バンド部１１を先端から挿通させたときに当該バンド部１１に設けられた図外の鋸歯に嵌合してバンド部１１の抜け出しを防止する係止歯を備えるロック部１２とを備えている。なお、これらバンド部１１及びロック部１２の構成については後述する実施形態のケーブルタイと同じ構成であるので、ここでは説明は省略する。
【０００３】
前記ロック部１２の下面には嵌合部３０が設けられており、この嵌合部３０は、下方に突出したポスト３１の両側に矢尻型に張り出した一対の嵌合片３２を有しており、シャーシ２の表面側から嵌合片３２をシャーシ２に設けた透孔３内に挿入すると、一対の嵌合片３２は弾性により縮径されて透孔３を通され、通過後は弾性復帰して拡径することで嵌合片３２の末端部に設けた段部３２ａが透孔３の内縁部に嵌合する。また、嵌合片３２に対向して設けられているハ字状をした一対の脚片３４がシャーシ２の表面側に当接することで、前記段部３２ａと透孔３との嵌合状態が保持される。このような嵌合部を備える固定具としては、例えば特許文献１に記載のものがある。
【０００４】
【特許文献１】
特開平９−２４２９３６号公報
【０００５】
【発明が解決しようとする課題】
ところで、近年における家電製品、ＯＡ機器、自動車、電子機器全般において環境問題の解決策として環境配慮型製品の販売が義務付けられている中で、例えば、電子機器に内装したプリント基板や配線を電子機器のシャーシやパネル等から解体可能にすることが要求されている。特に、解体作業を容易に行うために、工具等を用いることなく容易に解体することが要求されている。しかしながら、図１２に示した従来の嵌合部の構造では、嵌合片３２を手や工具等を用いて縮径させてシャーシ２の透孔３から引き出すことが必要であり、この場合嵌合片３２が小さくて掴み難いためにその操作が困難であるという問題がある。また、シャーシ２の裏面側で嵌合片３２を縮径させる必要があり、作業性が悪いという問題もある。
【０００６】
この問題に対しては、嵌合片３２の弾性力を弱く設計、製造すれば嵌合片３２を縮径させることが容易になり、シャーシからの取り外しも容易になる。しかし、シャーシの裏面側での作業についての問題は改善することができず、また単に弾性力を弱くしたのでは、外力を受けたときに嵌合片３２が容易に変形して縮径されてしまうおそれがあり、固定具がシャーシから簡単に脱落されてしまうという問題が生じることになる。
【０００７】
本発明の目的は、シャーシの表面側からの取り外しを容易に行う一方で、シャーシから容易に脱落されることがない固定具を提供するものである。
【０００８】
【課題を解決するための手段】
本発明は、シャーシに部品を保持させるための保持部と、当該保持部と一体に設けられ、シャーシに設けられた透孔に嵌合して保持部をシャーシに固定するための嵌合部とを備える固定具において、嵌合部は、保持部の一側から下方に向けて突出されたポストと、ポストの先端部に設けられ、外径方向に弾性変形して透孔に嵌合される矢尻型をした一対の嵌合片と、嵌合片の先端部からそれぞれ保持部の両側面に沿って所要の間隔をもって延設された一対の解除片と、解除片の一部に基端部が連結され先端部がシャーシの表面に当接可能な一対の脚片とを備え、解除片の延設端部は保持部の側面に対して所要の間隔で対峙され、前記嵌合片が前記透孔に嵌合したときに前記保持部の側面に当接するように構成されており、解除片は両外側から摘むように手操作されたときに内側方向に弾性変形され、連結されている一対の嵌合片を内径方向に弾性変形して透孔との嵌合から離脱させ、同時に一対の脚片を内側方向に移動させるように構成されていることを特徴とする。
【０００９】
本発明によれば、嵌合部に設けた一対の解除片を両外側から指で摘んで嵌合片を内径方向に弾性変形させることでシャーシの透孔から固定具を容易に取り外すことができる。また、嵌合部が透孔に嵌合した状態では一対の解除片の延設端部が保持部の側面に当接されるとともに一対の脚片がシャーシの表面に当接されるため、当該解除片でのてこ作用によって解除片につながる嵌合片に対して縮径方向の力が加えられ、透孔からの離脱が防止される。さらに、解除片と保持部との間に間隔が確保されているため保持部が傾斜した場合に、傾倒力が解除片から嵌合片に伝達されることがなく、嵌合片が透孔から外れることがない。
【００１０】
また、本発明は、シャーシに部品を保持させるための保持部と、当該保持部と一体に設けられ、シャーシに設けられた透孔に嵌合して保持部をシャーシに固定するための嵌合部とを備える固定具において、嵌合部は、保持部の一側から下方に向けて突出されたポストと、ポストの先端部に設けられ、外径方向に弾性変形して透孔に嵌合される矢尻型をした一対の嵌合片と、嵌合片の先端部からそれぞれ保持部の両側面に沿って所要の間隔をもって延設された一対の解除片と、解除片の一部に基端部が連結され先端部がシャーシの表面に当接可能な一対の脚片とを備え、解除片の延設端は易変形部を介して前記保持部に連結されており、解除片は両外側から摘むように手操作されたときに内側方向に弾性変形され、連結されている一対の嵌合片を内径方向に弾性変形して透孔との嵌合から離脱させ、同時に一対の脚片を内側方向に移動させるように構成されていることを特徴とする。
【００１１】
本発明によれば、嵌合部に設けた一対の解除片を両外側から指で摘んで嵌合片を内径方向に弾性変形させることでシャーシの透孔から固定具を容易に取り外すことができる。また、嵌合部が透孔に嵌合した状態では一対の解除片の延設端部が保持部の側面に当接されるとともに一対の脚片がシャーシの表面に当接されるため、当該解除片でのてこ作用によって解除片につながる嵌合片に対して縮径方向の力が加えられ、透孔からの離脱が防止される。さらに、解除片と保持部との間に間隔が確保されているため保持部が傾斜した場合に、傾倒力が解除片から嵌合片に伝達されることがなく、嵌合片が透孔から外れることがない。特に、解除片に設けた易変形部によって保持部に加えられる応力が易変形部で吸収されて解除片ないし嵌合片に伝達されることもなく、嵌合片が透孔から外れることがない。
【００１２】
【発明の実施の形態】
次に、本発明の実施形態を図面を参照して説明する。図１は本発明の固定具をケーブルタイに適用した第１の実施形態の斜視図である。また、図２（ａ），（ｂ）は側面図と背面図、図３（ａ）〜（ｃ）は要部の正面図、底面図、及びＡＡ線断面図である。これらの図において、本実施形態のケーブルタイ１は、図外のケーブルを巻き締め状態にクランプするための保持部１０と、この保持部１０をシャーシ２に取着するために、当該シャーシ２に設けられた透孔３に嵌合される嵌合部２０とで構成されており、両部は樹脂成形により一体に形成されている。前記保持部１０はベルト部１１と、このベルト部１１をケーブルを巻き締めた状態にロックするロック部１２とで構成されている。
【００１３】
前記ベルト部１１及びロック部１２の構成は既に広く知られている構造であり、前記ベルト部１１は、基端部１１１が前記ロック部１２に連結された所要幅で所要長さのベルトとして形成されており、先端部１１２は若干幅寸法が徐々に縮小されてロック部１２への挿通が容易にされるとともに、その長さ方向の中間部１１４の一側面には鋸歯部１１３が長さ方向の所要領域にわたって形成されている。前記ロック部１２は矩形をした筒状部１２１を有しており、この筒状部１２１の内部には前記ベルト部１１の先端部１１２ないし中間部１１４を挿通可能な挿通溝１２２が形成され、この挿通溝１２２内には前記ベルト部１１の鋸歯部１１３に嵌合可能な舌片状のロック片１２３が内装支持されている。そのため、前記ベルト部１１を図外のケーブルの周囲に沿って曲げ変形させながらその先端部１１２からロック部１２の挿通溝１２２内に挿通し、ロック片１２３と鋸歯部１１３とを嵌合させることで、ベルト部１１は挿通溝１２２からの離脱が係止され、ケーブルを巻き締めた状態が保持される。
【００１４】
前記嵌合部２０は前記ロック部１２の筒状部１２１の下面から所要の長さで下方に突出した細長い板状のポスト２１を備えている。前記ポスト２１の下側の先端部にはそれぞれ径方向に弾性変形可能な一対の嵌合片２２，２２が連結されており、嵌合部全体として矢尻型に形成されている。前記一対の嵌合片２２，２２の外側面は前記ポスト２１を中心とした円弧状とされ、円形の輪郭の一部を構成するようになっている。また、前記一対の嵌合片２２，２２の拡径された各端部にはそれぞれ板厚の小さい連結片２３，２３が一体に連結形成されており、当該先端部の外側面には前記連結片２３，２３と嵌合片２２，２２との板厚の差に相当する径方向の段部２２ａ，２２ａが形成されている。
【００１５】
前記一対の連結片２３，２３の他端には、それぞれ前記ロック部１２の筒状部１２１の両側面に沿って幾分外側に湾曲された状態で上方に向けて延設された一対の解除片２４，２４が連結されている。また、前記一対の解除片２４，２４が前記連結片２３，２３に連結されている箇所には、それぞれ両外方向の幾分下方に向けて傾斜した状態でほぼ真直に突出された一対の脚片２５，２５が一体に形成されている。この一対の脚片２５，２５の各先端部２５ａ，２５ａはシャーシ２の表面に当接するためにロッド状に形成されており、この先端部２５ａ，２５ａは通常では前記嵌合片２２，２２の段部２２ａ，２２ａよりもシャーシ２の板厚に対応して若干上方に位置されている。また、前記一対の解除片２４，２４の延設端部２４ａ，２４ａは若干薄肉に形成されるとともにそれぞれ内側に向けてＵ字状に曲げ形成され、この屈曲された延設端部２４ａ，２４ａは前記ロック部１２の筒状部１２１の各外側面に対して若干の間隔をおいて対峙されるように位置されている。
【００１６】
以上の構成のケーブルタイ１によれば、ケーブルタイ１をシャーシ２の透孔３に取着する際には、ケーブルタイ１の嵌合部２０をシャーシ２の上面側から透孔３に挿入する。このようにして挿入することにより、図４（ａ）のように、嵌合部２０の一対の嵌合片２２，２２は内径方向に弾性変形されて縮径され、透孔３内への挿入を可能にする。そして、図４（ｂ）に示すように、嵌合片２２，２２が透孔３を貫通すると、嵌合片２２，２２は弾性力によって復元して外径方向に拡径し、段部２２ａ，２２ａがシャーシ２の下面において透孔３の内縁部に係合する。また、これと同時に一対の脚片２５，２５の先端部２５ａ，２５ａがシャーシ２の表面に弾性的に当接され、嵌合部２０を上方に付勢するため、前記段部２２ａ，２２ａを透孔３の内縁部に対して押圧することになり、係合状態を保持することになる。これにより、ケーブルタイ１を上方に引っ張った場合でも、段部２２ａ，２２ａと透孔３との係合によって嵌合部２０が透孔３から挿脱されることがなく、ケーブルタイ１をシャーシ２に固定することができる。
【００１７】
しかる上で、図５に示すように、シャーシ２の上面上に延設しようとするケーブルＣにベルト部１１を巻き付け、当該ベルト部１１の先端部１１２をロック部１２の挿通溝１２２に挿入し、ロック片１２３と鋸歯部１１３とを嵌合させることで、ベルト部１１は挿通方向と逆方向への離脱が係止され、ケーブルＣを巻き締めた状態が保持される。したがって、ケーブルＣはケーブルタイ１によってシャーシ２の上面に保持される。なお、ベルト部１１においてケーブルを巻き締める作業はケーブルタイ１をシャーシに取着する前に行っていてもよく、その上で嵌合部２０を透孔３に挿入して嵌合取着するようにしてもよい。図５はその場合を示している。
【００１８】
そして、ケーブルタイ１がシャーシ２に取着されている図４（ｂ）の状態では、一対の脚片２５，２５の先端部２５ａ，２５ａがシャーシ２の表面に当接されて広がる方向に変形される応力が生じ、一対の解除片２４，２４が内側に倒れる方向に変形され、解除片２４，２４の延設端部２４ａ，２４ａがロック部１２（筒状部１２１）の両側面に多少の弾性力をもって当接される。そのため、解除片２４，２４を支点としたてこの作用によって一対の嵌合片２２，２２には連結片２３，２３を介して外径方向に広がる応力が加えられるため、嵌合片２２，２２と透孔３との嵌合力が増大され、ケーブルタイ１が透孔３から外れ難くなり、外力等によっても容易にシャーシ２から離脱されることはない。また、このとき一対の脚片２５，２５はシャーシ２の板厚の相違に応じて先端部２５ａ，２５ａでの変形量が変化され、当該板厚の相違によっても嵌合片２２，２２との間でシャーシ２を板厚方向に挟んで嵌合状態を確かなものとする。
【００１９】
さらに、ケーブルタイ１が取着されている状態において、図６に示すように、仮にケーブルタイ１がケーブルＣを通して外力を受け、シャーシ２上で保持部１０につながるロック部１２が傾倒された場合でも、ロック部１２と解除片２４，２４の延設端部２４ａ，２４ａとは離間されているため、ロック部１２に引っ張られて解除片２４，２４が傾倒されることはない。そのため、解除片２４，２４が内径方向に傾倒されて嵌合片２２，２２と透孔３との嵌合状態が損なわれることはなく、嵌合部２０での脱落が防止される。また、保持部１０が傾倒されたときにはロック部１２が傾倒された側の解除片２４の延設端部２４ａに当接されるため、保持部１０がそれ以上に傾倒することが抑制されるとともに、解除片２４のさらなる傾倒が抑制されることにもなる。
【００２０】
一方、シャーシ２の透孔３に取着されたケーブルタイ１をシャーシから離脱する際には、図４（ａ）に鎖線で示したように、２本の指Ｆで解除片２４，２４を両外側から摘み、かつ両側から力を加えて解除片２４，２４を内側に変形させる。この変形により、同図のように解除片２４，２４と一体の連結片２３，２３も内側に向けて変形され、さらに連結片２３，２３と一体の嵌合片２２，２２も内側に変形されて縮径され、段部２２ａ，２２ａが透孔３の内縁部から外れることになる。したがって、そのままケーブルタイ１をシャーシ２の上方に引き上げることで嵌合部２０を透孔３から引き抜くことができ、ケーブルタイ１の取り外しが実現できる。
【００２１】
図７は本発明を第１の実施形態と同様なケーブルタイ１に適用した第２の実施形態の斜視図であり、第１の実施形態と同様に保持部１０と嵌合部２０とで構成されている。これら保持部１０及びこの嵌合部２０は基本的には第１の実施形態と同じであるので同一部分には同一符号を付して詳細な説明は省略する。この第２の実施形態では、図８に嵌合部２０の正面図を示すように、嵌合部２０に設けられた一対の嵌合片２２，２２の上端部に連結片２３，２３を介して接続される一対の解除片２４，２４をロック部１２の両側面に沿って延設した上で、その延設端部を薄肉に形成した易変形部２６，２６によってロック部１２の両側面の上側の肩部に連結した構成としている。この易変形部２６，２６は肉厚が薄いためにロック部１２に対して解除片２４，２４を相対的に変形させることが可能とされている。
【００２２】
この第２の実施形態のケーブルタイ１によれば、ケーブルタイ１をシャーシ２の透孔３に取着する際には、第１の実施形態と同様に、ケーブルタイ１の嵌合部２０をシャーシ２の上面側から透孔３に挿入すれば、図８のように嵌合部２０の一対の嵌合片２２，２２は内径方向に弾性変形されて縮径され、貫通後は嵌合片２２，２２は弾性力によって復元して外径方向に拡径し、段部２２ａ，２２ａがシャーシ２の下面において透孔３の内縁部に係合する。また、これと同時に一対の脚片２５，２５の先端部２５ａ，２５ａがシャーシ２の表面に弾性的に当接され、嵌合部２０を上方に付勢するため、前記段部２２ａ，２２ａを透孔３の内縁部に対して押圧する。これにより、嵌合部２０が透孔３に嵌合され、当該透孔３から挿脱されることがなくなる。
【００２３】
また、このように嵌合部２０が透孔３に嵌合されている状態では、一対の脚片２５，２５の先端部２５ａ，２５ａがシャーシ２の表面に当接されて広がる方向に変形される応力が生じ、これと一体の一対の解除片２４，２４が内側に倒れる方向に変形される一方、解除片２４，２４の延設端部が易変形部２６，２６を介してロック部１２に連結されているため、解除片２４，２４を支点としたてこの作用によって連結片２３，２３を介して一対の嵌合片２２，２２は外径方向に広がる応力が加えられ、嵌合片２２，２２と透孔３との嵌合力が増大され、嵌合部２０が透孔３から外れ難くなり、外力等によっても容易にケーブルタイ１がシャーシから離脱されることはない。このとき、脚片２５，２５での変形によって板厚の異なるシャーシ２に対しても嵌合片２２，２２との間にシャーシ２を板厚方向に挟んで確かな嵌合状態が保持できることは言うまでもない。
【００２４】
また、仮に図９に示すように、ケーブル等に加えられる外力によって保持部１０が傾倒された場合でも、傾倒方向と反対側ではロック部１２と解除片２４とを連結している易変形部２６が弾性変形して伸長されるため、ロック部１２の傾倒力が解除片２４には伝達され難くなる。そのため、ロック部１２の傾倒に伴って解除片２４が内径方向に傾倒されて嵌合片２２と透孔３との嵌合状態が損なわれることはなく、嵌合部２０での脱落が防止される。また、その一方で傾倒された側においてはロック部１２の傾倒は易変形部２６を介して解除片２４に伝達されて解除片２４に当接される状態となるため、当該易変形部２６を介してロック部１２の傾倒が抑制されることになり、保持部１０がそれ以上傾倒することが抑制されることになる。
【００２５】
一方、シャーシ２の透孔３に取着されたケーブルタイ１をシャーシから離脱する際には、第１の実施形態と同様に、２本の指で解除片２４，２４を両外側から摘み、かつ両側から力を加えて解除片２４，２４を内側に変形させ、連結片２３，２３を介して嵌合片２２，２２を内側に変形して縮径し、段部２２ａ，２２ａを透孔３の内縁部から外することによって嵌合部２２を透孔３から引き抜くことができ、ケーブルタイ１の取り外しが実現できる。
【００２６】
ここで、前記実施形態では本発明をケーブルタイに適用した実施形態を示してたが、保持部の構成が異なる他の固定具についても同様に適用することが可能である。例えば、本発明の第１の実施形態の嵌合部を適用する場合には、図１０に示すように上向きコ字状をしたサドル本体４１の開口を開閉可能な係止片４２の先端部にロック片４３を有し、このロック片４３をサドル本体４１に設けたロック部４４に対してロック可能なサドル部４０を有して、ケーブルがより離脱され難くしたロッキングワイヤサドル１Ａについても本発明を適用することが可能である。この場合には、嵌合部２０の一対の解除片２４，２４の各延設端部２４ａ，２４ａはサドル本体４１の両側面に沿って所要の間隔で対峙するように配設すればよい。
【００２７】
あるいは、図１１に示すように、保持部として図１２に示したような嵌合片３２及び脚片３４で構成される上端嵌合部３０を備え、この上端嵌合部においてプリント回路基板を保持する基板保持具についても本発明を適用することが可能である。すなわち、嵌合部２０のポスト２１に一体のボディ３３を有しており、このボディ３３の上端部にポスト３１を立設し、このポスト３１に一対の嵌合片３２，３２を上向きに形成し、その下側に一対の脚片３４，３４を形成したものである。この嵌合部３０では、嵌合片３２を図外のプリント回路基板に設けた透孔に嵌合し、脚片３４との間に挟持することでボディ３３上にプリント回路基板を保持することが可能である。
【００２８】
さらに、本発明の固定具は、図示は省略するが、嵌合部をシャーシに設けた透孔に嵌合して取着し、保持部において各種部品をシャーシに保持させる各種の固定具についても同様に適用できることは言うまでもない。
【００２９】
【発明の効果】
以上説明したように本発明の固定具は、嵌合部に設けた一体の解除片を両外側から指で摘んで嵌合片を内径方向に弾性変形させることでシャーシの透孔から固定具を容易に取り外すことができる。また、嵌合部が透孔に嵌合した状態では一対の解除片の突出先端部が保持部に当接され、あるいは連結されていることにより解除片でのてこ作用によって解除片につながる嵌合片に対して拡径方向の力が加えられ、透孔からの離脱が防止される。さらに、保持部が傾斜した場合には、保持部に加えられる応力が嵌合片に伝達されることがなく、あるいは伝達され難くなり嵌合片が縮径されて透孔から外れるようなこともない。これにより、着脱を容易にする一方で、シャーシから脱落され難い固定具を得ることが可能になる。
【図面の簡単な説明】
【図１】本発明をケーブルタイに適用した第１の実施形態の斜視図である。
【図２】ケーブルタイの右側面図と背面図である。
【図３】要部の正面図、底面図及びＡＡ線断面図である。
【図４】嵌合部を透孔に嵌合する状態と嵌合した状態の断面図である。
【図５】ケーブルタイでケーブルを保持した状態を示す斜視図である。
【図６】嵌合部に外力が加えられた状態の断面図である。
【図７】本発明の第２の実施形態の斜視図である。
【図８】第２の実施形態の嵌合部を透孔に嵌合した状態の断面図である。
【図９】嵌合部に外力が加えられた状態の断面図である。
【図１０】本発明をワイヤサドルに適用した実施形態の正面図である。
【図１１】本発明を基板保持具に適用した実施形態の正面図である。
【図１２】従来のケーブルタイの一部の断面図である。
【符号の説明】
１ケーブルタイ（固定具）
１Ａワイヤサドル
１Ｂ基板保持具
２シャーシ
３透孔
１０保持部
１１ベルト部
１２ロック部
２０嵌合部
２１ポスト
２２嵌合片
２３連結片
２４解除片
２４ａ延設端部
２５脚片
２６易変形部
Ｃケーブル
Ｆ指[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fixture used for mounting an electronic component, a cable, or the like on a chassis of an electronic device or the like, and more particularly to a fixture that can be easily detached from the surface side of the chassis.
[0002]
[Prior art]
When assembling electronic equipment, it is necessary to attach electronic parts to an assembly board such as a panel, chassis, and board (hereinafter referred to as a chassis) and to arrange wiring parts such as cables in an extended manner. Parts are used. For example, when a plurality of cables are arranged in parallel along the surface of the chassis, a cable tie that attaches to the chassis in a state in which a plurality of cables are bound is used. An example of a conventional cable tie is shown in FIG. The cable tie 1C is connected to a band portion 11 having a free end at the other end for bundling a plurality of cables and a base end of the band portion 11 and when the band portion 11 is inserted from the distal end. And a lock portion 12 having a locking tooth that is fitted to a saw tooth (not shown) provided in the band portion 11 and prevents the band portion 11 from coming off. Note that the configurations of the band portion 11 and the lock portion 12 are the same as those of the cable tie of the embodiment described later, and thus the description thereof is omitted here.
[0003]
A fitting portion 30 is provided on the lower surface of the lock portion 12, and the fitting portion 30 has a pair of fitting pieces 32 projecting in an arrowhead shape on both sides of a post 31 protruding downward. When the fitting piece 32 is inserted into the through-hole 3 provided in the chassis 2 from the surface side of the chassis 2, the pair of fitting pieces 32 are elastically reduced in diameter and passed through the through-hole 3. Then, the stepped portion 32 a provided at the end portion of the fitting piece 32 is fitted to the inner edge portion of the through hole 3 by expanding the diameter. In addition, the pair of leg-shaped legs 34 provided opposite to the fitting pieces 32 abut on the surface side of the chassis 2, so that the stepped portion 32 a and the through-hole 3 are fitted. Retained. As a fixture provided with such a fitting part, there exists a thing of patent documents 1, for example.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-242936
[Problems to be solved by the invention]
By the way, in recent years home appliances, office automation equipment, automobiles, and electronic devices are generally required to sell environmentally conscious products as a solution to environmental problems. For example, printed circuit boards and wirings embedded in electronic devices are used as electronic devices. It is required to be able to be dismantled from the chassis, panels, etc. In particular, in order to easily perform the dismantling work, it is required to dismantle easily without using a tool or the like. However, in the structure of the conventional fitting portion shown in FIG. 12, it is necessary to reduce the diameter of the fitting piece 32 using a hand or a tool and pull it out from the through hole 3 of the chassis 2. There is a problem that the operation is difficult because the piece 32 is small and difficult to grasp. Moreover, it is necessary to reduce the diameter of the fitting piece 32 on the back surface side of the chassis 2, and there is a problem that workability is poor.
[0006]
To solve this problem, if the elastic force of the fitting piece 32 is designed and manufactured to be weak, it is easy to reduce the diameter of the fitting piece 32 and to remove it from the chassis. However, the problem with the work on the back side of the chassis cannot be improved, and if the elastic force is simply weakened, the fitting piece 32 is easily deformed and reduced in diameter when subjected to an external force. This may cause a problem that the fixture can be easily removed from the chassis.
[0007]
An object of the present invention is to provide a fixture that can be easily detached from the front surface side of the chassis while not easily falling off the chassis.
[0008]
[Means for Solving the Problems]
The present invention includes a holding portion for holding a component in the chassis, and a fitting portion that is provided integrally with the holding portion and that fits into a through hole provided in the chassis to fix the holding portion to the chassis. In the fixing device, the fitting portion is provided at a post projecting downward from one side of the holding portion and a tip end portion of the post, and is elastically deformed in the outer diameter direction and fitted into the through hole. A pair of arrow-shaped fitting pieces, a pair of release pieces extending from the front end portion of the fitting piece along the both side surfaces of the holding portion with a predetermined interval, and a base end portion on a part of the release pieces And a pair of leg pieces whose front end portions can come into contact with the surface of the chassis, the extended end portions of the release pieces are opposed to the side surfaces of the holding portion at a required interval, and the fitting pieces are is configured to abut a side face of the holding portion when fitted to the through hole, releasing pieces from both sides The pair of mating pieces are elastically deformed in the inner diameter direction to be released from the fitting with the through holes, and at the same time, the pair of leg pieces are moved inwardly. It is comprised so that it may move .
[0009]
According to the present invention, the fixture can be easily removed from the through hole of the chassis by gripping the pair of release pieces provided in the fitting portion with fingers from both outsides and elastically deforming the fitting pieces in the inner diameter direction. . Further, in the state where the fitting portion is fitted in the through hole, the extended end portions of the pair of release pieces are in contact with the side surfaces of the holding portion and the pair of leg pieces are in contact with the surface of the chassis. A force in the direction of diameter reduction is applied to the fitting piece connected to the release piece by the lever action at the release piece, and the separation from the through hole is prevented. Further, since the clearance is secured between the release piece and the holding portion, when the holding portion is inclined, the tilting force is not transmitted from the release piece to the fitting piece, and the fitting piece is removed from the through hole. It will not come off.
[0010]
In addition, the present invention provides a holding portion for holding a component in the chassis, and a fitting that is provided integrally with the holding portion and that fits into a through hole provided in the chassis to fix the holding portion to the chassis. In the fixing device including the fitting portion, the fitting portion is provided at the post projecting downward from one side of the holding portion and the tip end portion of the post, and is elastically deformed in the outer diameter direction and fitted into the through hole. Based on a pair of fitting pieces in the shape of an arrowhead, a pair of release pieces extending from the front end of the fitting piece along the both side surfaces of the holding part at a predetermined interval, and a part of the release pieces. A pair of leg pieces whose end parts are connected and whose tip parts can come into contact with the surface of the chassis, and the extended ends of the release pieces are connected to the holding part via easily deformable parts, A pair of mating pieces that are elastically deformed and connected inward when manually operated to pick from the outside Elastically deformed radially inward to disengage from the mating of the hole, characterized in that it is configured to move the pair of leg inward simultaneously.
[0011]
According to the present invention, the fixture can be easily removed from the through hole of the chassis by gripping the pair of release pieces provided in the fitting portion with fingers from both outsides and elastically deforming the fitting pieces in the inner diameter direction. . Further, in the state where the fitting portion is fitted in the through hole, the extended end portions of the pair of release pieces are in contact with the side surfaces of the holding portion and the pair of leg pieces are in contact with the surface of the chassis. A force in the direction of diameter reduction is applied to the fitting piece connected to the release piece by the lever action at the release piece, and the separation from the through hole is prevented. Further, since the clearance is secured between the release piece and the holding portion, when the holding portion is inclined, the tilting force is not transmitted from the release piece to the fitting piece, and the fitting piece is removed from the through hole. It will not come off. In particular, the stress applied to the holding portion by the easily deformable portion provided on the release piece is not absorbed by the easily deformable portion and transmitted to the release piece or the fitting piece, and the fitting piece does not come off the through hole. .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a first embodiment in which the fixture of the present invention is applied to a cable tie. 2 (a) and 2 (b) are a side view and a rear view, and FIGS. 3 (a) to 3 (c) are a front view, a bottom view, and a cross-sectional view taken along line AA. In these drawings, the cable tie 1 of the present embodiment includes a holding unit 10 for clamping a cable (not shown) in a tightened state, and the chassis 2 for attaching the holding unit 10 to the chassis 2. It is comprised by the fitting part 20 fitted by the provided through-hole 3, and both parts are integrally formed by resin molding. The holding unit 10 includes a belt unit 11 and a lock unit 12 that locks the belt unit 11 in a state in which a cable is tightened.
[0013]
The configurations of the belt portion 11 and the lock portion 12 are already widely known, and the belt portion 11 is formed as a belt having a required width and a required length in which a base end portion 111 is connected to the lock portion 12. The distal end portion 112 is slightly reduced in width to be easily inserted into the lock portion 12, and a sawtooth portion 113 is provided on one side surface of the lengthwise intermediate portion 114 in the length direction. Is formed over the required area. The lock portion 12 has a rectangular cylindrical portion 121, and an insertion groove 122 through which the front end portion 112 or the intermediate portion 114 of the belt portion 11 can be inserted is formed inside the cylindrical portion 121. Inside the insertion groove 122, a tongue-like lock piece 123 that can be fitted into the sawtooth portion 113 of the belt portion 11 is supported internally. Therefore, the belt portion 11 is inserted into the insertion groove 122 of the lock portion 12 from the distal end portion 112 while bending and deforming along the periphery of the cable (not shown), and the lock piece 123 and the sawtooth portion 113 are fitted. Thus, the belt portion 11 is locked from being detached from the insertion groove 122, and the state where the cable is wound is held.
[0014]
The fitting portion 20 includes an elongated plate-like post 21 that protrudes downward from the lower surface of the cylindrical portion 121 of the lock portion 12 by a predetermined length. A pair of fitting pieces 22 and 22 that are elastically deformable in the radial direction are connected to the lower end portion of the post 21, and the whole fitting portion is formed in an arrowhead shape. The outer surfaces of the pair of fitting pieces 22 and 22 are formed in an arc shape with the post 21 as the center, and constitute a part of a circular outline. In addition, connecting pieces 23 and 23 having a small plate thickness are integrally connected to the end portions of the pair of fitting pieces 22 and 22 whose diameters are enlarged, and the connecting surface is formed on the outer surface of the tip portion. Step portions 22a and 22a in the radial direction corresponding to the difference in plate thickness between the pieces 23 and 23 and the fitting pieces 22 and 22 are formed.
[0015]
At the other end of the pair of connecting pieces 23, 23, a pair of release members extending upward in a state of being slightly curved outward along both side surfaces of the cylindrical portion 121 of the lock portion 12 respectively. The pieces 24 and 24 are connected. In addition, a pair of legs projecting substantially straight in a state in which the pair of release pieces 24, 24 are connected to the connecting pieces 23, 23, respectively, in a state of being inclined slightly downward in both outward directions. The pieces 25 and 25 are integrally formed. The tip portions 25a, 25a of the pair of leg pieces 25, 25 are formed in a rod shape so as to abut against the surface of the chassis 2, and the tip portions 25a, 25a are normally formed on the fitting pieces 22, 22. It is located slightly above the step portions 22a and 22a corresponding to the thickness of the chassis 2. Further, the extended end portions 24a, 24a of the pair of release pieces 24, 24 are formed to be slightly thin and bent in a U shape toward the inside, respectively, and the bent extended end portions 24a, 24a are formed. Is positioned so as to be opposed to each outer surface of the cylindrical portion 121 of the lock portion 12 with a slight gap.
[0016]
According to the cable tie 1 having the above configuration, when the cable tie 1 is attached to the through hole 3 of the chassis 2, the fitting portion 20 of the cable tie 1 is inserted into the through hole 3 from the upper surface side of the chassis 2. . By inserting in this way, as shown in FIG. 4A, the pair of fitting pieces 22, 22 of the fitting portion 20 is elastically deformed in the inner diameter direction to be reduced in diameter, and inserted into the through hole 3. Enable. Then, as shown in FIG. 4B, when the fitting pieces 22 and 22 pass through the through hole 3, the fitting pieces 22 and 22 are restored by elastic force and expanded in the outer diameter direction, and the step portion 22a. , 22a engages with the inner edge of the through hole 3 on the lower surface of the chassis 2. At the same time, the tip portions 25a and 25a of the pair of leg pieces 25 and 25 are elastically brought into contact with the surface of the chassis 2 to urge the fitting portion 20 upward. It will press against the inner edge part of the through-hole 3, and an engagement state will be hold | maintained. Accordingly, even when the cable tie 1 is pulled upward, the fitting portion 20 is not inserted into and removed from the through hole 3 due to the engagement between the step portions 22a and 22a and the through hole 3, and the cable tie 1 is removed from the chassis. 2 can be fixed.
[0017]
Then, as shown in FIG. 5, the belt portion 11 is wound around the cable C to be extended on the upper surface of the chassis 2, and the leading end portion 112 of the belt portion 11 is inserted into the insertion groove 122 of the lock portion 12. By engaging the lock piece 123 with the sawtooth portion 113, the belt portion 11 is locked in the direction opposite to the insertion direction, and the state where the cable C is wound is held. Accordingly, the cable C is held on the upper surface of the chassis 2 by the cable tie 1. The work of tightening the cable in the belt portion 11 may be performed before the cable tie 1 is attached to the chassis, and then the fitting portion 20 is inserted into the through hole 3 and attached. It may be. FIG. 5 shows such a case.
[0018]
In the state of FIG. 4B in which the cable tie 1 is attached to the chassis 2, the tip portions 25 a and 25 a of the pair of leg pieces 25 and 25 are deformed in a direction in which they are in contact with the surface of the chassis 2 and spread. Is generated, the pair of release pieces 24, 24 are deformed in a direction to fall inward, and the extended end portions 24a, 24a of the release pieces 24, 24 are somewhat on both side surfaces of the lock portion 12 (tubular portion 121). It abuts with the elastic force of. For this reason, stress that spreads in the outer diameter direction is applied to the pair of fitting pieces 22 and 22 through the connecting pieces 23 and 23 by the action of the release pieces 24 and 24 as fulcrums. And the fitting force between the through hole 3 is increased, the cable tie 1 is hardly detached from the through hole 3, and is not easily detached from the chassis 2 by an external force or the like. At this time, the amount of deformation of the pair of leg pieces 25 and 25 at the tip portions 25a and 25a is changed according to the difference in the plate thickness of the chassis 2, and the difference between the plate thickness and the fitting pieces 22 and 22 is also changed. The chassis 2 is sandwiched between them in the thickness direction, and the fitting state is assured.
[0019]
Furthermore, when the cable tie 1 is attached, as shown in FIG. 6, if the cable tie 1 receives an external force through the cable C and the lock portion 12 connected to the holding portion 10 is tilted on the chassis 2. However, since the lock part 12 and the extended ends 24a and 24a of the release pieces 24 and 24 are separated from each other, the release pieces 24 and 24 are not tilted by being pulled by the lock part 12. Therefore, the release pieces 24, 24 are tilted in the inner diameter direction, and the fitting state between the fitting pieces 22, 22 and the through hole 3 is not impaired, and the drop off at the fitting portion 20 is prevented. Further, when the holding portion 10 is tilted, the locking portion 12 is brought into contact with the extended end portion 24a of the releasing piece 24 on the tilted side, so that the holding portion 10 is prevented from further tilting. Further tilting of the release piece 24 is also suppressed.
[0020]
On the other hand, when the cable tie 1 attached to the through hole 3 of the chassis 2 is detached from the chassis, the release pieces 24, 24 are held by the two fingers F as shown by the chain line in FIG. The release pieces 24, 24 are deformed inward by picking from both outer sides and applying force from both sides. As a result of this deformation, the connecting pieces 23 and 23 integral with the release pieces 24 and 24 are also deformed inward as shown in the figure, and the fitting pieces 22 and 22 integral with the connecting pieces 23 and 23 are also deformed inward. Thus, the stepped portions 22a and 22a are detached from the inner edge portion of the through hole 3. Accordingly, by pulling the cable tie 1 upward of the chassis 2 as it is, the fitting portion 20 can be pulled out from the through hole 3, and the cable tie 1 can be removed.
[0021]
FIG. 7 is a perspective view of a second embodiment in which the present invention is applied to a cable tie 1 similar to that of the first embodiment, and includes a holding portion 10 and a fitting portion 20 as in the first embodiment. Has been. Since the holding portion 10 and the fitting portion 20 are basically the same as those in the first embodiment, the same portions are denoted by the same reference numerals and detailed description thereof is omitted. In the second embodiment, as shown in a front view of the fitting portion 20 in FIG. 8, the upper ends of the pair of fitting pieces 22, 22 provided in the fitting portion 20 are connected via connecting pieces 23, 23. A pair of release pieces 24, 24 connected to each other are extended along the both side surfaces of the lock portion 12, and the extended end portions of the lock portion 12 are formed by the easily deformable portions 26, 26 formed thin. It is set as the structure connected with the upper shoulder part. Since the easily deformable portions 26 and 26 are thin, the release pieces 24 and 24 can be relatively deformed with respect to the lock portion 12.
[0022]
According to the cable tie 1 of the second embodiment, when the cable tie 1 is attached to the through hole 3 of the chassis 2, the fitting portion 20 of the cable tie 1 is attached as in the first embodiment. When inserted into the through-hole 3 from the upper surface side of the chassis 2, the pair of fitting pieces 22, 22 of the fitting portion 20 are elastically deformed in the inner diameter direction and reduced in diameter as shown in FIG. 22 and 22 are restored by elastic force and expanded in the outer diameter direction, and the step portions 22 a and 22 a engage with the inner edge portion of the through hole 3 on the lower surface of the chassis 2. At the same time, the tip portions 25a and 25a of the pair of leg pieces 25 and 25 are elastically brought into contact with the surface of the chassis 2 to urge the fitting portion 20 upward. Press against the inner edge of the through hole 3. Thereby, the fitting part 20 is fitted into the through hole 3 and is not inserted into or removed from the through hole 3.
[0023]
Further, in the state where the fitting portion 20 is fitted in the through hole 3 in this way, the distal end portions 25a, 25a of the pair of leg pieces 25, 25 are deformed in a direction in which they are brought into contact with the surface of the chassis 2 and spread. The pair of release pieces 24, 24 integral with the release pieces 24, 24 are deformed in a direction to fall inward, while the extended end portions of the release pieces 24, 24 are connected to the lock portion 12 via the easily deformable portions 26, 26. Since the release pieces 24 and 24 are used as fulcrums, the pair of fitting pieces 22 and 22 are subjected to stress spreading in the outer diameter direction via the connecting pieces 23 and 23 by the action of the release pieces 24 and 24. The fitting force between the holes 22 and 22 and the through-hole 3 is increased, and the fitting portion 20 is hardly detached from the through-hole 3, and the cable tie 1 is not easily detached from the chassis by an external force or the like. At this time, even if the chassis 2 has a different thickness due to the deformation of the leg pieces 25 and 25, the chassis 2 is sandwiched between the fitting pieces 22 and 22 in the thickness direction, and a reliable fitting state can be maintained. Needless to say.
[0024]
Further, as shown in FIG. 9, even when the holding portion 10 is tilted by an external force applied to the cable or the like, the easily deformable portion 26 that connects the lock portion 12 and the release piece 24 on the opposite side to the tilting direction. Is elastically deformed and extended, the tilting force of the lock portion 12 is hardly transmitted to the release piece 24. Therefore, the release piece 24 is tilted in the inner diameter direction as the lock portion 12 is tilted, and the fitting state between the fitting piece 22 and the through hole 3 is not impaired, and the drop-off at the fitting portion 20 is prevented. The On the other hand, on the tilted side, the tilt of the lock portion 12 is transmitted to the release piece 24 via the easily deformable portion 26 and is brought into contact with the release piece 24. Accordingly, the tilt of the lock portion 12 is suppressed, and the tilt of the holding portion 10 is further suppressed.
[0025]
On the other hand, when the cable tie 1 attached to the through hole 3 of the chassis 2 is detached from the chassis, the release pieces 24 and 24 are picked from both outsides with two fingers, as in the first embodiment. In addition, the release pieces 24, 24 are deformed inward by applying force from both sides, and the fitting pieces 22, 22 are deformed inward through the connecting pieces 23, 23 to reduce the diameter, and the step portions 22a, 22a are made through holes. 3, the fitting portion 22 can be pulled out from the through-hole 3 and the cable tie 1 can be removed.
[0026]
Here, although the embodiment in which the present invention is applied to the cable tie is shown in the above-described embodiment, the present invention can be similarly applied to other fixtures having different holding part configurations. For example, when the fitting portion of the first embodiment of the present invention is applied, the opening of the saddle body 41 having an upward U-shape as shown in FIG. The present invention also relates to a locking wire saddle 1A having a lock piece 43 and having a saddle portion 40 that can lock the lock piece 43 with respect to a lock portion 44 provided on the saddle body 41, thereby making it difficult for the cable to be detached. It is possible to apply. In this case, the extended end portions 24 a and 24 a of the pair of release pieces 24 and 24 of the fitting portion 20 may be disposed so as to face each other along the both side surfaces of the saddle body 41 at a required interval.
[0027]
Alternatively, as shown in FIG. 11, an upper end fitting portion 30 composed of the fitting piece 32 and the leg piece 34 as shown in FIG. 12 is provided as a holding portion, and the printed circuit board is held in the upper end fitting portion. The present invention can also be applied to a substrate holder. That is, the post 21 of the fitting portion 20 has an integral body 33, the post 31 is erected on the upper end portion of the body 33, and a pair of fitting pieces 32, 32 are formed upward on the post 31. A pair of leg pieces 34, 34 are formed on the lower side. In the fitting portion 30, the fitting piece 32 is fitted into a through hole provided in a printed circuit board (not shown), and is held between the leg pieces 34 to hold the printed circuit board on the body 33. Is possible.
[0028]
Furthermore, although not shown in the drawings, the fixture of the present invention is also applicable to various fixtures in which the fitting portion is fitted and attached to a through hole provided in the chassis, and the holding portion holds various components on the chassis. It goes without saying that the same applies.
[0029]
【The invention's effect】
As described above, the fixture according to the present invention is configured to remove the fixture from the through hole of the chassis by gripping the integral release piece provided in the fitting portion with fingers from both sides and elastically deforming the fitting piece in the inner diameter direction. It can be easily removed. In addition, when the fitting part is fitted in the through-hole, the protruding tip part of the pair of release pieces comes into contact with or is connected to the holding part so that the release part can be connected to the release piece by lever action. A force in the diameter increasing direction is applied to the piece, and separation from the through hole is prevented. Furthermore, when the holding portion is inclined, the stress applied to the holding portion is not transmitted to the fitting piece, or it is difficult to transmit the fitting piece, and the fitting piece is reduced in diameter so that it can be removed from the through hole. Absent. This makes it possible to obtain a fixture that is easy to attach and detach and that is not easily removed from the chassis.
[Brief description of the drawings]
FIG. 1 is a perspective view of a first embodiment in which the present invention is applied to a cable tie.
FIG. 2 is a right side view and a rear view of a cable tie.
FIG. 3 is a front view, a bottom view, and a cross-sectional view taken along line AA of the main part.
FIG. 4 is a cross-sectional view of a state where the fitting portion is fitted into the through hole and a state where the fitting portion is fitted.
FIG. 5 is a perspective view showing a state where a cable is held by a cable tie.
FIG. 6 is a cross-sectional view showing a state in which an external force is applied to the fitting portion.
FIG. 7 is a perspective view of a second embodiment of the present invention.
FIG. 8 is a cross-sectional view of a state in which the fitting portion of the second embodiment is fitted into a through hole.
FIG. 9 is a cross-sectional view showing a state in which an external force is applied to the fitting portion.
FIG. 10 is a front view of an embodiment in which the present invention is applied to a wire saddle.
FIG. 11 is a front view of an embodiment in which the present invention is applied to a substrate holder.
FIG. 12 is a cross-sectional view of a part of a conventional cable tie.
[Explanation of symbols]
1 Cable tie (fixture)
1A Wire saddle 1B Substrate holder 2 Chassis 3 Through hole 10 Holding part 11 Belt part 12 Locking part 20 Fitting part 21 Post 22 Fitting piece 23 Connection piece 24 Release piece 24a Extension end part 25 Leg piece 26 Easy deformation part C Cable F Finger

Claims

A holding portion for holding a component in the chassis; and a fitting portion that is provided integrally with the holding portion and is fitted into a through-hole provided in the chassis to fix the holding portion to the chassis. In the fixture provided, the fitting portion is provided at a post projecting downward from one side of the holding portion and a tip portion of the post, and is elastically deformed in an outer diameter direction and fitted into the through hole. A pair of fitting pieces in the shape of an arrowhead, a pair of release pieces extending from the front end portion of the fitting piece along the both side surfaces of the holding portion with a predetermined interval, and the release pieces A pair of leg pieces connected to a part of the base end and capable of contacting the front surface of the chassis, and the extended end of the release piece is opposed to the side surface of the holding part at a required interval. When the fitting piece is fitted into the through-hole, the fitting piece comes into contact with the side surface of the holding portion. It is configured to, the releasing pieces are elastically deformed inwardly when it is manually operated to pick from both sides, the through hole of said pair of fitting pieces are connected elastically deformed radially inward and The fixture is configured to be detached from the fitting and to move the pair of leg pieces inward at the same time .

A holding portion for holding a component in the chassis; and a fitting portion that is provided integrally with the holding portion and is fitted into a through-hole provided in the chassis to fix the holding portion to the chassis. In the fixture provided, the fitting portion is provided at a post projecting downward from one side of the holding portion and a tip portion of the post, and is elastically deformed in an outer diameter direction and fitted into the through hole. A pair of fitting pieces in the shape of an arrowhead, a pair of release pieces extending from the front end portion of the fitting piece along the both side surfaces of the holding portion with a predetermined interval, and the release pieces A pair of leg pieces connected to a part of the base end part and a front end part of which can be brought into contact with the surface of the chassis, and an extended end of the release piece is connected to the holding part via an easily deformable part. The release piece is elastic inward when it is manually operated so that it can be picked from both outsides. Is a form, the pair of fitting pieces are connected elastically deformed radially inward to disengage from the fitting between the through hole, and is configured to move the pair of leg inward simultaneously A fixture characterized by that.