JP3843491B2

JP3843491B2 - Magnetic head adjustment mechanism

Info

Publication number: JP3843491B2
Application number: JP18625196A
Authority: JP
Inventors: 潤一桧垣; 克俊岡田
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1996-07-16
Filing date: 1996-07-16
Publication date: 2006-11-08
Anticipated expiration: 2016-07-16
Also published as: JPH1031812A

Description

【０００１】
【発明の属する技術分野】
この発明は、ビデオテープレコーダー等の磁気記録再生装置の磁気ヘッドの調整機構に関するものである。
【０００２】
【従来の技術】
図１１〜図１３は、例えば、実公平６ー４４１０号公報に記載された従来の磁気記録再生装置の磁気ヘッド調整機構を示す図であり、図１１は側面図、図１２は正面図、図１３は平面図を表す。
【０００３】
図１１〜１３において、１は磁気ヘッド、２は磁気ヘッド１を固定する台座、３は磁気ヘッド１および台座２を調整可能に保持するベース板金、４は台座２にＺ方向に付勢力を与えるばね、５はばね４の一端を保持し台座２を貫通してベース板金３に螺合したねじ、６は台座２に螺合しベース板金３に当接することで磁気ヘッド１をＡ１−Ａ２方向に調整するあおり調整ねじ、７は台座２を貫通してベース板金３に螺合することで磁気ヘッド１のＢ１−Ｂ２方向の調整を行うアジマス調整ねじ、８はベース板金３をＨ１方向およびＸ２方向に付勢力を与える圧縮ねじりばね、９はデッキベース１４に垂直に立設されたねじ付きシャフト、１０はねじ付きシャフト９に嵌合された円筒ガイド、１１は圧縮ねじりばね８の付勢力に抗する付勢力をベース板金３に与えることで磁気ヘッド１のＨ１ーＨ２方向の調整を行う高さ調整ナット、１２はデッキベース１４に垂直に立設されたねじ付きシャフト、１３はねじ付きシャフト１２に螺合され一部をベース板金に当接されたテーパー状のナット、１５はデッキベース１４に設けられた圧縮ねじりばね８の係止部である。
【０００４】
このように構成された従来の磁気ヘッド調整機構によれば、あおり調整ねじ６を進退させることで台座２とあおり調整ねじ６との螺合により台座２を傾斜させて磁気ヘッド１のあおり方向Ａ１−Ａ２の調整を行ない、アジマス調整ねじ７を進退させることでねじ５に設けられたばね４の付勢力との合力により台座２を傾斜させて磁気ヘッド１のアジマス方向Ｂ１−Ｂ２の調整を行なう。また、磁気ヘッド１の高さ方向Ｈ１−Ｈ２の調整はナット１１により、Ｘ位置Ｘ１−Ｘ２はテ−パ−ナット１３を、締め込んだりあるいは緩めたりすることで調整する。
【０００５】
【発明が解決しようとする課題】
従来の磁気ヘッド調整機構は、以上のように構成されており、あおり方向Ａ１−Ａ２およびアジマス方向Ｂ１−Ｂ２の調整は台座２の傾動により、高さ方向Ｈ１−Ｈ２およびＸ位置Ｘ１−Ｘ２の調整はベース板金３の移動により行なっていた。このため、かかる従来例によればＸ位置Ｘ１−Ｘ２と高さ方向の調整に相互依存性が生じ、調整を１度に行なうことが困難であった。
この問題を解消するため、実公平６ー４４１０号公報においては、Ｘ位置調整用のテーパーナット１３とベース板金３の間にレバー部材を介在させるようにして相互依存性を解消するようにしていた。
しかし、かかる構成によれば、必然的に部品点数が増加するためヘッド調整機構が高価なものとなってしまうという問題点がある。
【０００６】
また、従来の磁気ヘッド調整機構においては、何らかの要因で磁気ヘッド１や台座２に外力が加わると、ねじ付きシャフト９と円筒ガイド１０間のガタにより、磁気ヘッド１の姿勢が変わりやすく、テープ走行に悪影響をおよぼすという問題点があった。
このため、ねじ付きシャフト９と円筒ガイド１０間のガタを小さくすべく軸穴を精度良くしたりあるいは嵌合長を長くする必要が生じ、これもコストのかかる要因となっていた。
【０００７】
また、ねじ付きシャフト９とナット１１による高さ調整では、他のあおり調整ねじ６、アジマス調整ねじ７等とはことなる治具、具体的にはナット専用のドライバーを用意する必要があるため、工具の統一化の妨げあるいは調整時間のかかる要因ともなっていた。
【０００８】
この発明は、上述のような問題点を解消するためになされたもので、簡易かつ低コストな構成で磁気ヘッドの姿勢（あおり、アジマス）、高さ、Ｘ位置調整が行なえる磁気ヘッド調整機構を得ることを目的とする。また、調整工具の統一化を図り、調整作業の改善を図った磁気ヘッド調整機構を得ることを目的とする。
【０００９】
【課題を解決するための手段】
この発明の請求項１に係る磁気ヘッド調整機構は、磁気記録媒体に信号を記録あるいは該記録媒体から信号を再生する磁気ヘッドの姿勢および高さ調整を行なうものにおいて、磁気ヘッドを固定する台座と、前記台座を調整可能に支持するベース板金と、前記台座を前記ベース板金に付勢する第１の付勢手段と、前記台座に螺合かつ前記ベース板金に先端が当接、あるいは、前記台座を貫通かつ前記ベース板金に螺合し、前記台座に固定された磁気ヘッドの姿勢を調整する複数の調整ねじと、前記台座と前記ベース板金間に配置され、一端を前記ベース板金に固定し、他端を前記台座に付勢力を与えるべく当接した高さ調整板金と、前記高さ調整板金の前記他端の先端部に螺合あるいは貫通し、その先端を前記ベース板金に当接あるいは螺合した高さ調整ねじを備えたことを特徴とする。
【００１０】
また、この発明の請求項２に係る磁気ヘッド調整機構は、請求項１に記載された発明における台座の磁気ヘッド前面に近接する部位に凹部を形成するとともに、高さ調整板金の台座と当接する部位に凸部を形成し、該凹部と凸部を係合させたことを特徴とする。
【００１１】
また、この発明の請求項３に係る磁気ヘッド調整機構は、請求項１に記載された発明において、ベース板金に当接し、磁気ヘッドの調整前の基準高さを規定する支持部と、前記支持部と対向して設けられ前記ベース板金の回動軸をなすとともに該ベース板金を固定する固定ねじと、前記ベース板金の回動位置を規制するテーパー面を有するナットと、前記ベース板金を前記ナットのテーパー面に付勢する第２の付勢手段を備えたことを特徴とする。
【００１２】
また、この発明の請求項４に係る磁気ヘッド調整機構は、請求項１に記載された発明における高さ調整板金をベース板金の一部から構成したことを特徴とする。
【００１３】
また、この発明の請求項５に係る磁気ヘッド調整機構は、請求項１に記載された発明における第１の付勢手段を複数の調整ねじの軸部周囲に配された圧縮ばねとしたことを特徴とする。
【００１４】
また、この発明の請求項６に係る磁気ヘッド調整機構は、請求項１に記載された発明における第１の付勢手段を複数の調整ねじの軸部に螺合した弾性を有する板金としたことを特徴とする。
【００１５】
また、この発明の請求項７に係る磁気ヘッド調整機構は、請求項６に記載された発明における板金をベース板金の一部から構成したことを特徴とする。
【００１６】
また、この発明の請求項８に係る磁気ヘッド調整機構は、磁気記録媒体に信号を記録あるいは該記録媒体から信号を再生する磁気ヘッドの姿勢および高さ調整を行なうものにおいて、磁気ヘッドを固定する台座と、コの字形状の折り曲げ部を複数有し、前記台座を調整可能に支持するベース板金と、前記各折り曲げ部に対応して設けられ、前記台座に固定された磁気ヘッドの姿勢あるいは高さ位置を調整するそれぞれの調整ねじとを備え、前記各調整ねじが前記台座および対応するそれぞれの前記折り曲げ部を貫通するとともに前記ベース板金に螺合し、前記各折り曲げ部が当接して前記台座に付勢力を与えることを特徴とする。
【００１７】
【発明の実施の形態】
以下、本発明をその実施の形態を示す図面に基づいて具体的に説明する。
実施の形態１．
図１はこの発明の実施の形態１である磁気ヘッド調整機構の斜視図、図２はその側面図、図３は同正面図、図４は同平面図である。なお、前記従来と同一もしくは相当部分には同一符号を示してその説明は省略する。
【００１８】
図１〜図４において、２Ａは台座２の磁気ヘッド１前面に近接した位置に形成された凹部、１６はデッキベース１４上に配設されたベース板金３を支持し、調整前の磁気ヘッド１の高さ基準位置を規定する支持部、２３は凸部２３Ａを凹部２Ａに当接するように配置された高さ調整板金、２１は先端をベース板金３に当接し高さ調整板金２３に螺合された高さ調整ねじ、２２は高さ調整板金２３をベース板金３へ固定する固定ねじ、２４は磁気ヘッド１のＸ位置を調整後、磁気ヘッド調整機構のベース板金３をデッキベース１４上に固定する固定ねじ、２５はデッキベース１４に配設・固定されたベース板金取り付けボスである。
【００１９】
本発明の磁気ヘッド調整機構は以下のように調整を行なう。まず始めに、磁気ヘッド１をＨ１−Ｈ２の高さ方向へ調整を行う。調整前、ばね４により台座２はＨ２方向へ付勢されており、また、アジマス調整ねじ７のベース板金への螺合および高さ調整板金２３の弾性により台座２はベース板金３に対して固定されている。台座２および磁気ヘッド１の高さは、高さ調整ねじ２１の先端がベース板金３へ当接し、該高さ調整ねじ２１に螺合した高さ調整板金２３の凸部２３Ａが台座２の凹部２Ａに係合することにより決定されている。ここで、高さ調整ねじ２１を締め付けると、高さ調整板金２３の先端は高さ調整ねじ２１に沿ってＨ１方向へ移動し、高さ調整板金２３の剛性により凸部２３Ａと台座凹部２Ａは一体にＨ１方向に移動し、磁気ヘッド１はＨ１方向へ調整される。
【００２０】
逆に、高さ調整ねじ２１を緩めると、高さ調整板金２３の先端は高さ調整ねじ２１に沿ってＨ２方向へ移動し、ばね４の付勢力により、台座凹部２Ａと板金凸部２３Ａは一体にＨ２方向へ移動し、磁気ヘッド１はＨ２方向へ調整される。
【００２１】
続いて、磁気ヘッド１をあおり方向Ａ１−Ａ２、アジマス方向Ｂ１−Ｂ２に調整を行う。あおり方向Ａ１−Ａ２およびアジマス方向Ｂ１−Ｂ２は相互に直交する方向であり、調整に対する相互依存性はないため、いずれを先に調整してもよいが、ここではあおり方向を先に調整する場合について説明する。ばね４によりＨ２方向へ付勢力を与えられた台座２は、台座２に取り付けられたねじ６の先端がベース板金３へ当接することにより姿勢が決定されている。ここで、ねじ６を締め付けると、台座２の凹部２Ａを支点として、台座２の後部は、上方向へ移動しＡ１方向への調整がなされる。この際、台座２が傾くことになり、磁気ヘッド１は高さ方向Ｈ２にも移動するため、高さ方向の再調整が必要になるとも考えられるが、本発明では動作支点をなす調整凹部２Ａを磁気ヘッド１の前面に近接した位置に形成しているので、磁気ヘッド１の高さ方向位置の変動は最小限に抑制され、高さ方向の再調整はほぼ不要である。逆に、ねじ７を緩めると、台座２の凹部２Ａを支点として、台座２の後部は、下方向へ移動しＡ２方向への調整がなされる。
【００２２】
次に、磁気ヘッド１をアジマス方向Ｂ１−Ｂ２へ調整する。ばね４によりＨ２方向への付勢力を与えられた台座２は、台座凹部２Ａとあおり調整ねじ６を結んだ線を軸として、台座２とアジマス調整ねじ７の頭部下面との当接面でＢ１−Ｂ２方向の姿勢が決定されている。ここでアジマス調整ねじ７を締め付けると、アジマス調整ねじ７の頭部下面と当接する台座２の部分はＨ２方向へ移動し、その結果、磁気ヘッド１は前記軸を回動軸としてＢ１方向への調整がなされる。
逆に、アジマス調整ねじ７を緩めると、アジマス調整ねじ７の頭部下面と当接する台座２の部分はＨ１方向へ移動し、その結果、磁気ヘッド１は前記軸を回動軸としてＢ２方向への調整がなされる。
【００２３】
最後に、磁気ヘッド１のＸ位値Ｘ１−Ｘ２を調整する。圧縮ねじりばね８によりＸ２方向へ付勢されたベース板金３は、端面がテーパーナット１３に当接し、Ｘ位置が決定されている。ここで、テーパーナット１３を締め付けると、ベース板金３が当接するテーパーの径の増加により、ねじ付きシャフト１２を軸として当接面はばね８の付勢力に抗してＸ１方向へ移動し磁気ヘッド調整機構はＸ１方向へ調整される。逆に、テーパーナット１３を緩めると、ベース板金３が当接するテーパーの径の減少により当接面は、圧縮ねじりばね８のねじり力により、Ｘ２方向へ移動し、磁気ヘッド調整機構はＸ２方向へ調整がなされる。
【００２４】
このように構成された磁気ヘッド調整機構においては、磁気ヘッド１のＸ位置調整後、ねじ２４を締め付けることで磁気ヘッド調整機構を固定する。したがって固定後に何らかの要因で磁気ヘッド１や台座２に外力が加わった場合にも、磁気ヘッド１の姿勢が変わりやすいという従来の問題点は解消される。また、従来に比べ構造も簡素化されコスト低減を図れ、またねじ２４は他の調整ねじ６、７２１と同一の工具で調整を行なうことができる。なお、本実施の形態では、Ｘ位置Ｘ１−Ｘ２調整を最後に行なっているが、本発明ではアジマス、あおり、高さの調整を台座２の位置調整で行ない、Ｘ位置調整のみをベース板金３の調整で行なうものであるため、最初にＸ位置調整を行ない、固定ねじ２４により磁気ヘッド調整機構をデッキベース１４に固定した後、高さ、あおり、アジマス調整を台座２に対して行ってもよく、また、従来のように高さ調整とＸ位置調整に相互依存性もない。
【００２５】
実施の形態２．
図５はこの発明の実施の形態２である磁気ヘッド調整機構の斜視図である。
【００２６】
上述した実施の形態１においてはベース板金３とは別部材である高さ調整板金２３を固定ねじ２２で固定した構成を採っているため、コスト面での低減効果は不十分である。そこで、本実施の形態では、高さ調整板金３Ａをベース板金３を折り曲げることにより得ており、別部材を必要とすることなく実施の形態１で説明した高さ調整板金２３と同様の機能を達成できる。
【００２７】
磁気ヘッド１の調整については、実施の形態１と同様に、Ｈ１−Ｈ２方向の高さ調整を高さ調整ねじ２１、Ａ１−Ａ２方向のあおり調整はあおり調整ねじ６、Ｂ１−Ｂ２方向のアジマス調整はアジマス調整ねじ７、Ｘ１−Ｘ２方向のＸ位値調整はテーパーナット１３により行い、調整順序についても実施の形態１と同様であるため詳細な説明は省略する。
【００２８】
このように構成された磁気ヘッド調整機構においても、実施の形態１と同様、何らかの外力によって、磁気ヘッド１の姿勢が変わりやすいという問題点は解消される。また、構造的には実施の形態１に比しさらに簡素化されるため、さらなるコスト低減を図ることができる。
【００２９】
実施の形態３．
図６はこの発明の実施の形態３である磁気ヘッド調整機構の斜視図、図７はその側面図である。なお、図７において、高さ調整板金３Ａは一部省略して示している。
【００３０】
図において、２６はあおり調整ねじ６を貫通して台座２とベース板金３間に狭持された圧縮ばね、２７はアジマス調整ねじ７を貫通して台座２とベース板金３間に狭持された圧縮ばねであり、ばね２６、２７により台座２はＨ１方向に付勢力を与えられている。なお、本実施の形態ではあおり調整ねじ６は台座２を貫通しベース板金３に螺合している点で上述の実施の形態１あるいは２と相違するが、台座２に付勢力を与えるばね４およびねじ５を省略する代わりの付勢力を台座２に与えるためである。
【００３１】
磁気ヘッド１の調整については、実施の形態１あるいは２と同様に、Ｈ１−Ｈ２方向の高さ調整を高さ調整ねじ２１、Ａ１−Ａ２方向のあおり調整をあおり調整ねじ６、Ｂ１−Ｂ２方向のアジマス調整をアジマス調整ねじ７、Ｘ１−Ｘ２方向のＸ位値調整をテーパーナット１３により行う。
【００３２】
このように構成された磁気ヘッド調整機構においても、実施の形態１および２と同様に、何らかの外力によって、磁気ヘッド１の姿勢が変わりやすいという問題点は解消される。また、構造も従来あるいは上述の実施の形態１、２に比べ、台座２に付勢力を与えるばね４およびねじ５を不要にできるため簡素化され、コスト低減を図ることができる。
【００３３】
実施の形態４．
図８はこの発明の実施の形態４である磁気ヘッド調整機構の斜視図である。図において、６Ａはあおり調整ねじ６に螺合したあおり調整板金、７Ａはアジマス調整ねじ７に螺合したアジマス調整板金であり、これらにより台座２はＨ１方向に付勢力を与えられている。なお、本実施の形態ではあおり調整ねじ６およびアジマス調整ねじ７は台座２及び板金６Ａ，７Ａをそれぞれ貫通しベース板金３に螺合している。
【００３４】
磁気ヘッド１の調整については、実施の形態１乃至３と同様に、Ｈ１−Ｈ２方向の高さ調整を高さ調整ねじ２１、Ａ１−Ａ２方向のあおり調整をあおり調整ねじ６、Ｂ１−Ｂ２方向のアジマス調整をアジマス調整ねじ７、Ｘ１−Ｘ２方向のＸ位値調整をテーパーナット１３により行う。
【００３５】
このように構成された磁気ヘッド調整機構においても、実施の形態１乃至３と同様、何らかの外力によって、磁気ヘッド１の姿勢が変わりやすいという問題点は解消される。また、構造も上述の実施の形態３に比べ、台座２に付勢力を与える圧縮ばね２６、２７が不要になるため部品点数が削減され、コスト低減を図ることができる。
なお、上述の実施の形態１乃至４によれば、高さ調整ねじ２１は高さ調整板金２３，３Ａに螺合し、先端をベース板金３に当接するように構成されているが、高さ調整板金２３，３Ａを貫通し、ベース板金３に螺合するように構成してもよく、高さ調整板金２３，３Ａの弾性を規制し、磁気ヘッド１の高さを調整できるものであればその他の構成であってもよい。
【００３６】
実施の形態５．
図９はこの発明の実施の形態５である磁気ヘッド調整機構の斜視図、図１０はその側面図である。図において、３Ｂ、３Ｃ、３Ｄはベース板金３の折り曲げ部であり適当な弾性を持つ。
【００３７】
高さ調整ねじ２１、あおり調整ねじ６、アジマス調整ねじ７は台座２およびベース板金折り曲げ部３Ｂ、３Ｃ、３Ｄを貫通して、ベース板金３へ螺合されている。このときに、ベース板金３の折り曲げ部３Ｂ、３Ｃ、３Ｄは台座２のＨ１方向にバランス良く付勢力を与えるように初期の折り曲げ形状が決定されている。
【００３８】
磁気ヘッド１の調整については、他の実施の形態と同様に、Ｈ１−Ｈ２方向の高さ調整は高さ調整ねじ２１、Ａ１−Ａ２方向のあおり調整はあおり調整ねじ６、Ｂ１−Ｂ２方向のアジマス調整はアジマス調整ねじ７、Ｘ１−Ｘ２方向のＸ位置調整はテーパーナット１３により行う。
【００３９】
このように構成された磁気ヘッド調整機構においても、他の実施の形態と同様に、何らかの外力によって、磁気ヘッド１の姿勢が変わりやすいという問題点は解消される。また、構造も他の実施の形態に比べさらに簡素化されるため大幅なコスト低減をはかることができる。
【００４０】
【発明の効果】
この発明は、以上説明したように構成されているので以下に示す様な効果を奏する。
【００４１】
すなわち、本発明の請求項１に記載された磁気ヘッド調整機構は、磁気ヘッドを固定する台座と、前記台座を調整可能に支持するベース板金と、前記台座を前記ベース板金に付勢する第１の付勢手段と、前記台座に螺合かつ前記ベース板金に先端が当接、あるいは、前記台座を貫通かつ前記ベース板金に螺合し、前記台座に固定された磁気ヘッドの姿勢を調整する複数の調整ねじと、前記台座と前記ベース板金間に配置され、一端を前記ベース板金に固定し、他端を前記台座に付勢力を与えるべく当接した高さ調整板金と、前記高さ調整板金の前記他端の先端部に螺合あるいは貫通し、その先端を前記ベース板金に当接あるいは螺合した高さ調整ねじを備えて構成されているので、簡易かつ低コストな構成で磁気ヘッドの姿勢（アジマス、あおり）、高さの調整を行うことができる。
また、従来例にて説明した磁気ヘッド調整機構とは異なり、磁気ヘッドの高さ位置調整とＸ位置調整との間に相互依存性が生じないので調整を１度で完了させることができるという効果がある。
【００４２】
また、本発明の請求項２に記載された磁気ヘッド調整機構によれば、台座の凹部と高さ調整板金の凸部を支点として磁気ヘッドの姿勢が調整されるとともに、かかる支点が磁気ヘッドの前面近傍にあるために、磁気ヘッドの姿勢調整における高さ変化は最小限にとどめられ、再調整を不要にできる効果がある。
【００４３】
また、本発明の請求項３に記載された磁気ヘッド調整機構によれば、ベース板金に当接し、磁気ヘッドの調整前の基準高さを規定する支持部と、前記支持部と対向して設けられ前記ベース板金の回動軸をなすとともに該ベース板金を固定する固定ねじと、前記ベース板金の回動位置を規制するテーパー面を有するナットと、前記ベース板金を前記ナットのテーパー面に付勢する第２の付勢手段を備えているので、Ｘ位置調整後ベース板金をねじで固定することにより、従来のようなねじ付きシャフト、円筒ガイド間で生じていたガタは生じない。したがって、何らかの外力が加わっても磁気ヘッドの姿勢は変化することがなく、テープ走行の精度、信頼性を向上できる。
また、従来のような精度のよいねじ付きシャフト、円筒ガイドを必要としないため、コストの低減を図ることができる。
さらに、磁気ヘッドの姿勢、高さ、Ｘ位置調整を統一した工具で行えるので、調整作業の容易化、短時間化が図れる。
【００４４】
また、本発明の請求項４に記載された磁気ヘッド調整機構によれば、高さ調整板金を前記ベース板金の一部から構成しているので、部品点数を削減でき、さらなる低コスト化が図れる。
【００４５】
また、本発明の請求項５および６に記載された磁気ヘッド調整機構によれば、第１の付勢手段を複数の調整ねじの軸部周囲に配された圧縮ばね、あるいは、複数の調整ねじの軸部に螺合した弾性を有する板金で構成したので、さらなる構成の簡素化、低コスト化が図れる。
さらに、本発明の請求項７に記載された磁気ヘッド調整機構によれば、板金をベース板金の一部から構成したので、一層の低コスト化が実現される。
【００４６】
また、本発明の請求項８に記載された磁気ヘッド調整機構によれば、磁気ヘッドを固定する台座と、コの字形状の折り曲げ部を複数有し、前記台座を調整可能に支持するベース板金と、前記各折り曲げ部に対応して設けられ、前記台座に固定された磁気ヘッドの姿勢あるいは高さ位置を調整するそれぞれの調整ねじとを備え、前記各調整ねじが前記台座および対応するそれぞれの前記折り曲げ部を貫通するとともに前記ベース板金に螺合し、前記各折り曲げ部が当接して前記台座に付勢力を与えるように構成されているので、何らかの外力によって、磁気ヘッドの姿勢が変わりやすいという問題点は解消され、簡易かつ低コストな構成で磁気ヘッドの姿勢（アジマス、あおり）、高さの調整を行うことができる。また、本発明においても、従来例にて説明した磁気ヘッド調整機構とは異なり、磁気ヘッドの高さ位置調整とＸ位置調整との間に相互依存性が生じないので調整を１度で完了させることができるという効果がある。
【図面の簡単な説明】
【図１】この発明の実施の形態１である磁気ヘッド調整機構の斜視図である。
【図２】図１の磁気ヘッド調整機構の側面図である。
【図３】図１の磁気ヘッド調整機構の正面図である。
【図４】図１の磁気ヘッド調整機構の平面図である。
【図５】この発明の実施の形態２である磁気ヘッド調整機構の斜視図である。
【図６】この発明の実施の形態３である磁気ヘッド調整機構の斜視図である。
【図７】図６の磁気ヘッド調整機構の側面図である。
【図８】この発明の実施の形態４である磁気ヘッド調整機構の斜視図である。
【図９】この発明の実施の形態５である磁気ヘッド調整機構の斜視図である。
【図１０】図９の磁気ヘッド調整機構の側面図である。
【図１１】従来の磁気ヘッド調整機構の側面図である。
【図１２】従来の磁気ヘッド調整機構の正面図である。
【図１３】従来の磁気ヘッド調整機構の平面図である。
【符号の説明】
１磁気ヘッド、２台座、３ベース板金、４ばね、５ねじ、６あおり調整ねじ、７アジマス調整ねじ、８圧縮ねじりばね、１２ねじ付きシャフト、１３テーパーナット、１４デッキベース、１５圧縮ねじりばね係止部、１６磁気ヘッド調整機構支持部、２１高さ調整ねじ、２２高さ調整板金固定ねじ、２３高さ調整板金、２４ベース板金固定ねじ、２５ベース板金取り付けボス。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mechanism for adjusting a magnetic head of a magnetic recording / reproducing apparatus such as a video tape recorder.
[0002]
[Prior art]
FIGS. 11 to 13 are views showing a magnetic head adjusting mechanism of a conventional magnetic recording / reproducing apparatus described in, for example, Japanese Utility Model Publication No. 6-4410. FIG. 11 is a side view, FIG. 12 is a front view, and FIG. 13 represents a plan view.
[0003]
11 to 13, 1 is a magnetic head, 2 is a pedestal for fixing the magnetic head 1, 3 is a base metal plate for holding the magnetic head 1 and the pedestal 2 in an adjustable manner, and 4 is an urging force applied to the pedestal 2 in the Z direction. A spring 5 holds one end of the spring 4 and passes through the pedestal 2 and is screwed into the base sheet metal 3, and 6 is threaded into the pedestal 2 and abuts against the base sheet metal 3 to move the magnetic head 1 in the A1-A2 direction. A tilt adjusting screw 7 for adjusting the position of the magnetic head 1 is adjusted to the B1-B2 direction by passing through the base 2 and screwed to the base metal plate 3, and 8 is an azimuth adjusting screw for adjusting the base metal plate 3 in the H1 direction and X2. Compressive torsion spring for applying an urging force in the direction, 9 is a threaded shaft erected vertically to the deck base 14, 10 is a cylindrical guide fitted to the threaded shaft 9, and 11 is an urging force for the compression torsion spring 8. The force to resist A height adjusting nut that adjusts the magnetic head 1 in the H1-H2 direction by giving it to the steel sheet metal 3, 12 is a threaded shaft erected vertically to the deck base 14, and 13 is screwed to the threaded shaft 12 A tapered nut 15 a part of which is in contact with the base sheet metal, 15 is a locking portion of the compression torsion spring 8 provided on the deck base 14.
[0004]
According to the conventional magnetic head adjustment mechanism configured as described above, the tilt adjustment screw 6 is advanced and retracted to tilt the base 2 by screwing the base 2 and the tilt adjustment screw 6 to tilt the magnetic head 1 in the tilt direction A1. -A2 is adjusted, and the azimuth adjusting screw 7 is advanced and retracted to tilt the pedestal 2 by the resultant force with the urging force of the spring 4 provided on the screw 5, thereby adjusting the azimuth direction B1-B2 of the magnetic head 1. Further, the height direction H1-H2 of the magnetic head 1 is adjusted by the nut 11, and the X position X1-X2 is adjusted by tightening or loosening the taper nut 13.
[0005]
[Problems to be solved by the invention]
The conventional magnetic head adjustment mechanism is configured as described above, and the tilt direction A1-A2 and the azimuth direction B1-B2 are adjusted by the tilt of the base 2 in the height direction H1-H2 and the X position X1-X2. Adjustment was performed by moving the base sheet metal 3. For this reason, according to this conventional example, the X position X1-X2 and the adjustment in the height direction are interdependent, and it is difficult to perform the adjustment at a time.
In order to solve this problem, in Japanese Utility Model Publication No. 6-4410, a lever member is interposed between the taper nut 13 for adjusting the X position and the base metal plate 3 to eliminate the interdependence. .
However, such a configuration inevitably increases the number of parts, and thus there is a problem that the head adjustment mechanism becomes expensive.
[0006]
Further, in the conventional magnetic head adjusting mechanism, when an external force is applied to the magnetic head 1 or the pedestal 2 for some reason, the posture of the magnetic head 1 is easily changed due to the backlash between the threaded shaft 9 and the cylindrical guide 10, and the tape travels. There was a problem of adversely affecting the performance.
For this reason, it is necessary to increase the accuracy of the shaft hole or lengthen the fitting length in order to reduce the backlash between the threaded shaft 9 and the cylindrical guide 10, which is also a costly factor.
[0007]
In addition, in the height adjustment by the threaded shaft 9 and the nut 11, it is necessary to prepare a jig different from the other tilt adjusting screw 6, the azimuth adjusting screw 7, etc., specifically a screw driver for the nut. It has been a factor that hinders the unification of tools or takes time for adjustment.
[0008]
The present invention has been made to solve the above-described problems, and a magnetic head adjustment mechanism capable of adjusting the posture (tilt, azimuth), height, and X position of a magnetic head with a simple and low-cost configuration. The purpose is to obtain. It is another object of the present invention to obtain a magnetic head adjustment mechanism that unifies adjustment tools and improves adjustment work.
[0009]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a magnetic head adjusting mechanism for adjusting a posture and a height of a magnetic head for recording a signal on a magnetic recording medium or reproducing a signal from the recording medium. A base sheet metal that supports the pedestal in an adjustable manner, a first urging means for urging the pedestal against the base sheet metal, and a tip that abuts on the pedestal and is in contact with the base sheet metal, or the pedestal. A plurality of adjusting screws for adjusting the posture of the magnetic head fixed to the pedestal and threaded to the base sheet metal, and disposed between the pedestal and the base sheet metal, one end being fixed to the base sheet metal, A height adjusting sheet metal whose other end is in contact with the pedestal to apply an urging force, and a front end of the other end of the height adjusting sheet metal are screwed or penetrated, and the front end is in contact with or screwed into the base sheet metal. Together Characterized by comprising a height adjustment screw has.
[0010]
According to a second aspect of the present invention, there is provided a magnetic head adjusting mechanism which forms a recess in a portion of the pedestal close to the front surface of the magnetic head according to the first aspect of the invention and abuts the pedestal of the height adjusting sheet metal. A convex portion is formed at the site, and the concave portion and the convex portion are engaged with each other.
[0011]
A magnetic head adjustment mechanism according to a third aspect of the present invention is the magnetic head adjustment mechanism according to the first aspect, wherein the support portion abuts against the base metal plate and defines a reference height before adjustment of the magnetic head; A fixing screw that is provided opposite to the base and serves as a rotation axis of the base sheet metal and fixes the base sheet metal, a nut having a tapered surface that regulates a rotation position of the base sheet metal, and the base sheet metal as the nut The second urging means for urging the taper surface is provided.
[0012]
According to a fourth aspect of the present invention, there is provided a magnetic head adjusting mechanism, wherein the height adjusting sheet metal according to the first aspect of the present invention comprises a part of a base sheet metal.
[0013]
According to a fifth aspect of the present invention, in the magnetic head adjusting mechanism, the first urging means in the first aspect of the present invention is a compression spring arranged around the shafts of a plurality of adjusting screws. Features.
[0014]
A magnetic head adjusting mechanism according to a sixth aspect of the present invention is a sheet metal having elasticity in which the first urging means according to the first aspect of the present invention is screwed into shafts of a plurality of adjusting screws. It is characterized by.
[0015]
A magnetic head adjusting mechanism according to a seventh aspect of the present invention is characterized in that the sheet metal according to the sixth aspect of the present invention is constituted by a part of the base sheet metal.
[0016]
According to an eighth aspect of the present invention, there is provided a magnetic head adjusting mechanism for adjusting a posture and a height of a magnetic head for recording a signal on a magnetic recording medium or reproducing a signal from the recording medium, and fixing the magnetic head. A pedestal, a base sheet metal having a plurality of U -shaped bent portions and supporting the pedestal in an adjustable manner, and a posture or height of a magnetic head provided corresponding to each of the bent portions and fixed to the pedestal; Each adjusting screw for adjusting the position, and each adjusting screw passes through the base and the corresponding bent portion, and is screwed into the base sheet metal, and the bent portions come into contact with the base plate. It is characterized by giving an urging force to .
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
Embodiment 1 FIG.
1 is a perspective view of a magnetic head adjusting mechanism according to Embodiment 1 of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a front view thereof, and FIG. 4 is a plan view thereof. In addition, the same code | symbol is shown to the same or equivalent part as the said conventional, and the description is abbreviate | omitted.
[0018]
1 to 4, reference numeral 2 A denotes a recess formed near the front surface of the magnetic head 1 of the pedestal 2, and 16 denotes a base sheet metal 3 disposed on the deck base 14. A support portion that defines the height reference position of the metal plate, 23 is a height adjustment sheet metal disposed so that the convex portion 23A abuts against the concave portion 2A, and 21 is screwed into the height adjustment sheet metal 23 with the tip abutting against the base metal plate 3. The height adjusting screw 22 is a fixing screw for fixing the height adjusting metal plate 23 to the base metal plate 3, and 24 is a base plate 3 of the magnetic head adjusting mechanism on the deck base 14 after adjusting the X position of the magnetic head 1. A fixing screw 25 for fixing is a base metal plate mounting boss disposed and fixed to the deck base 14.
[0019]
The magnetic head adjustment mechanism of the present invention performs adjustment as follows. First, the magnetic head 1 is adjusted in the height direction of H1-H2. Before adjustment, the base 2 is urged in the H2 direction by the spring 4, and the base 2 is fixed to the base metal plate 3 by the screwing of the azimuth adjusting screw 7 to the base metal plate and the elasticity of the height adjusting metal plate 23. Has been. The height of the pedestal 2 and the magnetic head 1 is such that the tip of the height adjustment screw 21 is in contact with the base metal plate 3, and the convex portion 23 A of the height adjustment metal plate 23 screwed into the height adjustment screw 21 is the concave portion of the pedestal 2. It is determined by engaging 2A. Here, when the height adjustment screw 21 is tightened, the tip of the height adjustment sheet metal 23 moves in the H1 direction along the height adjustment screw 21, and the protrusion 23 A and the base recess 2 A are The magnetic head 1 is adjusted in the H1 direction by integrally moving in the H1 direction.
[0020]
Conversely, when the height adjustment screw 21 is loosened, the tip of the height adjustment sheet metal 23 moves in the H2 direction along the height adjustment screw 21, and the base recess 2 A and the sheet metal protrusion 23 A are moved by the urging force of the spring 4. The magnetic head 1 is moved in the H2 direction integrally, and the magnetic head 1 is adjusted in the H2 direction.
[0021]
Subsequently, the magnetic head 1 is adjusted in the tilt direction A1-A2 and the azimuth direction B1-B2. Since the tilt direction A1-A2 and the azimuth direction B1-B2 are directions orthogonal to each other and there is no interdependency with respect to the adjustment, either may be adjusted first, but here the tilt direction is adjusted first. Will be described. The pedestal 2 to which the urging force is applied in the H2 direction by the spring 4 is determined in such a manner that the tip of the screw 6 attached to the pedestal 2 comes into contact with the base metal plate 3. Here, when the screw 6 is tightened, the rear portion of the pedestal 2 moves upward with the recessed portion 2A of the pedestal 2 as a fulcrum and is adjusted in the A1 direction. At this time, since the pedestal 2 is inclined and the magnetic head 1 moves in the height direction H2, it may be necessary to readjust in the height direction. However, in the present invention, the adjustment recess 2A that forms the operation fulcrum is considered. Is formed at a position close to the front surface of the magnetic head 1, fluctuations in the height direction position of the magnetic head 1 are suppressed to a minimum, and readjustment in the height direction is almost unnecessary. On the other hand, when the screw 7 is loosened, the rear part of the base 2 moves downward with the concave portion 2A of the base 2 as a fulcrum and is adjusted in the A2 direction.
[0022]
Next, the magnetic head 1 is adjusted in the azimuth direction B1-B2. The pedestal 2 applied with an urging force in the H2 direction by the spring 4 is a contact surface between the pedestal 2 and the lower surface of the head of the azimuth adjusting screw 7 with a line connecting the pedestal recess 2A and the tilt adjusting screw 6 as an axis. The posture in the B1-B2 direction is determined. Here, when the azimuth adjusting screw 7 is tightened, the portion of the base 2 that contacts the lower surface of the head of the azimuth adjusting screw 7 moves in the H2 direction. As a result, the magnetic head 1 moves in the B1 direction with the axis as a rotation axis. Adjustments are made.
Conversely, when the azimuth adjusting screw 7 is loosened, the portion of the base 2 that comes into contact with the lower surface of the head of the azimuth adjusting screw 7 moves in the H1 direction. As a result, the magnetic head 1 moves in the B2 direction with the axis as a rotation axis. Adjustments are made.
[0023]
Finally, the X position value X1-X2 of the magnetic head 1 is adjusted. The base sheet metal 3 urged in the X2 direction by the compression torsion spring 8 is in contact with the taper nut 13 at the end face, and the X position is determined. When the taper nut 13 is tightened, the contact surface moves in the X1 direction against the urging force of the spring 8 with the threaded shaft 12 as an axis due to an increase in the diameter of the taper with which the base metal plate 3 contacts. The adjustment mechanism is adjusted in the X1 direction. On the contrary, when the taper nut 13 is loosened, the contact surface moves in the X2 direction by the torsional force of the compression torsion spring 8 due to a decrease in the diameter of the taper with which the base metal plate 3 contacts, and the magnetic head adjusting mechanism moves in the X2 direction. Adjustments are made.
[0024]
In the magnetic head adjustment mechanism configured as described above, the magnetic head adjustment mechanism is fixed by tightening the screw 24 after the X position adjustment of the magnetic head 1. Therefore, even when an external force is applied to the magnetic head 1 or the pedestal 2 for some reason after fixing, the conventional problem that the posture of the magnetic head 1 is easily changed is solved. Further, the structure is simplified and the cost can be reduced as compared with the prior art, and the screw 24 can be adjusted with the same tool as the other adjusting screws 6 and 721. In the present embodiment, the X position X1-X2 adjustment is performed last, but in the present invention, the azimuth, tilt, and height are adjusted by adjusting the position of the base 2, and only the X position adjustment is performed on the base sheet metal 3. Therefore, after adjusting the X position first and fixing the magnetic head adjusting mechanism to the deck base 14 with the fixing screw 24, the height, tilt, and azimuth adjustment may be performed on the base 2. Also, there is no interdependence between the height adjustment and the X position adjustment as in the prior art.
[0025]
Embodiment 2. FIG.
5 is a perspective view of a magnetic head adjustment mechanism according to Embodiment 2 of the present invention.
[0026]
In the first embodiment described above, since the height adjusting sheet metal 23, which is a separate member from the base sheet metal 3, is fixed by the fixing screw 22, the cost reduction effect is insufficient. Therefore, in the present embodiment, the height adjustment sheet metal 3A is obtained by bending the base sheet metal 3, and the same function as that of the height adjustment sheet metal 23 described in the first embodiment is obtained without requiring a separate member. Can be achieved.
[0027]
As for the adjustment of the magnetic head 1, as in the first embodiment, the height adjustment in the H1-H2 direction is performed by adjusting the height adjusting screw 21, the tilt adjustment in the A1-A2 direction is performed by the tilt adjusting screw 6, and the azimuth in the B1-B2 direction. The adjustment is performed by the azimuth adjusting screw 7 and the X-position value adjustment in the X1-X2 direction is performed by the taper nut 13. The adjustment order is the same as that in the first embodiment, and thus detailed description thereof is omitted.
[0028]
Also in the magnetic head adjustment mechanism configured as described above, the problem that the posture of the magnetic head 1 is easily changed by some external force is solved as in the first embodiment. Further, since the structure is further simplified as compared with the first embodiment, further cost reduction can be achieved.
[0029]
Embodiment 3 FIG.
6 is a perspective view of a magnetic head adjusting mechanism according to Embodiment 3 of the present invention, and FIG. 7 is a side view thereof. In FIG. 7, the height adjustment sheet metal 3A is partially omitted.
[0030]
In the figure, reference numeral 26 denotes a compression spring that passes through the tilt adjustment screw 6 and is sandwiched between the pedestal 2 and the base sheet metal 3, and 27 denotes a compression spring that passes through the azimuth adjustment screw 7 and is sandwiched between the pedestal 2 and the base sheet metal 3. This is a compression spring, and the pedestal 2 is given a biasing force in the H1 direction by the springs 26 and 27. In the present embodiment, the tilt adjusting screw 6 is different from the above-described first or second embodiment in that the tilt adjusting screw 6 penetrates the pedestal 2 and is screwed to the base sheet metal 3, but the spring 4 for applying an urging force to the pedestal 2. This is because an urging force instead of omitting the screw 5 is applied to the base 2.
[0031]
As for the adjustment of the magnetic head 1, as in the first or second embodiment, the height adjustment in the H1-H2 direction is performed by adjusting the height adjustment screw 21, the tilt adjustment in the A1-A2 direction, and the adjustment screw 6 in the B1-B2 direction. The azimuth is adjusted with the azimuth adjusting screw 7 and the X position value in the X1-X2 direction is adjusted with the taper nut 13.
[0032]
Also in the magnetic head adjustment mechanism configured as described above, the problem that the posture of the magnetic head 1 is easily changed by some external force is solved as in the first and second embodiments. Further, the structure can be simplified and the cost can be reduced because the spring 4 and the screw 5 for applying the urging force to the base 2 can be eliminated as compared with the conventional or the first and second embodiments.
[0033]
Embodiment 4 FIG.
FIG. 8 is a perspective view of a magnetic head adjustment mechanism according to Embodiment 4 of the present invention. In the figure, 6A is a tilt adjusting sheet metal screwed to the tilt adjusting screw 6, 7A is an azimuth adjusting sheet metal screwed to the azimuth adjusting screw 7, and the base 2 is given a biasing force in the H1 direction. In the present embodiment, the tilt adjusting screw 6 and the azimuth adjusting screw 7 pass through the base 2 and the metal plates 6A and 7A, respectively, and are screwed into the base metal plate 3.
[0034]
As for the adjustment of the magnetic head 1, as in the first to third embodiments, the height adjustment in the H1-H2 direction is performed by adjusting the height adjustment screw 21, the tilt adjustment in the A1-A2 direction, and the adjustment screw 6 in the B1-B2 direction. The azimuth is adjusted with the azimuth adjusting screw 7 and the X position value in the X1-X2 direction is adjusted with the taper nut 13.
[0035]
Also in the magnetic head adjustment mechanism configured as described above, the problem that the posture of the magnetic head 1 is easily changed by some external force is solved as in the first to third embodiments. Further, compared to the third embodiment, the structure eliminates the need for the compression springs 26 and 27 that apply the urging force to the pedestal 2, thereby reducing the number of parts and reducing the cost.
According to the above-described first to fourth embodiments, the height adjusting screw 21 is configured to be screwed into the height adjusting metal plates 23 and 3A and the tip abutted against the base metal plate 3. The adjustment sheet metal 23, 3A may be configured to penetrate the base sheet metal 3 so long as the elasticity of the height adjustment sheet metal 23, 3A is regulated and the height of the magnetic head 1 can be adjusted. Other configurations may be used.
[0036]
Embodiment 5 FIG.
FIG. 9 is a perspective view of a magnetic head adjusting mechanism according to Embodiment 5 of the present invention, and FIG. 10 is a side view thereof. In the figure, 3B, 3C, and 3D are bent portions of the base sheet metal 3 and have appropriate elasticity.
[0037]
The height adjusting screw 21, the tilt adjusting screw 6, and the azimuth adjusting screw 7 pass through the base 2 and the base sheet metal bending portions 3 B, 3 C, and 3 D and are screwed to the base sheet metal 3. At this time, the bent portions 3B, 3C, and 3D of the base metal plate 3 are determined to have an initial bent shape so as to give an urging force with a good balance in the H1 direction of the base 2.
[0038]
As for the adjustment of the magnetic head 1, as in the other embodiments, the height adjustment in the H1-H2 direction is performed by the height adjusting screw 21, the tilt adjustment in the A1-A2 direction is performed by the tilt adjusting screw 6, and the adjustment in the B1-B2 direction. The azimuth adjustment is performed by the azimuth adjustment screw 7 and the X position adjustment in the X1-X2 direction is performed by the taper nut 13.
[0039]
Also in the magnetic head adjustment mechanism configured as described above, the problem that the posture of the magnetic head 1 is easily changed by some external force is solved as in the other embodiments. In addition, since the structure is further simplified as compared with the other embodiments, significant cost reduction can be achieved.
[0040]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0041]
That is, a magnetic head adjusting mechanism according to claim 1 of the present invention includes a pedestal for fixing the magnetic head, a base sheet metal that supports the pedestal in an adjustable manner, and a first member that biases the pedestal to the base sheet metal. A plurality of biasing means, and a plurality of members for adjusting the posture of a magnetic head fixed to the pedestal by being screwed to the pedestal and having a tip abutting on the base metal plate, or penetrating the pedestal and screwed to the base metal plate. An adjustment screw, a height adjustment sheet metal disposed between the pedestal and the base sheet metal, one end fixed to the base sheet metal, and the other end abutted to give a biasing force to the pedestal, and the height adjustment sheet metal Is provided with a height adjusting screw that is screwed or penetrated into the tip of the other end and the tip of which is in contact with or screwed with the base sheet metal. Posture (azimuth, ah Ri), height adjustment can be performed.
Further, unlike the magnetic head adjustment mechanism described in the conventional example, there is no interdependence between the height position adjustment and the X position adjustment of the magnetic head, so that the adjustment can be completed at one time. There is.
[0042]
According to the magnetic head adjusting mechanism described in claim 2 of the present invention, the attitude of the magnetic head is adjusted with the concave portion of the pedestal and the convex portion of the height adjusting sheet metal as fulcrums, and the fulcrum is provided on the magnetic head. Since it is in the vicinity of the front surface, the height change in adjusting the posture of the magnetic head is minimized, and there is an effect that readjustment is unnecessary.
[0043]
According to the magnetic head adjusting mechanism described in claim 3 of the present invention, a support portion that abuts the base metal plate and defines a reference height before adjustment of the magnetic head is provided opposite to the support portion. A fixing screw that forms a rotation axis of the base sheet metal and fixes the base sheet metal, a nut having a tapered surface that restricts a rotation position of the base sheet metal, and biases the base sheet metal to the tapered surface of the nut. Since the second urging means is provided, by fixing the base metal plate with the screw after the X position adjustment, the backlash generated between the conventional threaded shaft and the cylindrical guide does not occur. Therefore, even if some external force is applied, the posture of the magnetic head does not change, and the accuracy and reliability of tape running can be improved.
Further, since a highly accurate threaded shaft and cylindrical guide as in the prior art are not required, the cost can be reduced.
Furthermore, since the position, height and X position adjustment of the magnetic head can be performed with a unified tool, the adjustment work can be facilitated and shortened.
[0044]
Further, according to the magnetic head adjusting mechanism described in claim 4 of the present invention, since the height adjusting sheet metal is constituted by a part of the base sheet metal, the number of parts can be reduced and the cost can be further reduced. .
[0045]
According to the magnetic head adjusting mechanism described in claims 5 and 6 of the present invention, the first urging means is a compression spring arranged around the shafts of the plurality of adjusting screws, or a plurality of adjusting screws. Since it is made of an elastic sheet metal screwed to the shaft portion, further simplification of the configuration and cost reduction can be achieved.
Further, according to the magnetic head adjusting mechanism described in claim 7 of the present invention, since the sheet metal is constituted by a part of the base sheet metal, further cost reduction is realized.
[0046]
According to the magnetic head adjusting mechanism described in claim 8 of the present invention, a base sheet metal having a pedestal for fixing the magnetic head and a plurality of U -shaped bent portions and supporting the pedestal in an adjustable manner. And each adjusting screw that is provided corresponding to each of the bent portions and adjusts the posture or height position of the magnetic head fixed to the pedestal, and each of the adjusting screws corresponds to the pedestal and the corresponding each of the adjusting screws. Since it is configured to pass through the bent portion and screw into the base metal plate, the bent portions abut and apply a biasing force to the pedestal, the posture of the magnetic head is easily changed by some external force. The problem is solved, and the posture (azimuth, tilt) and height of the magnetic head can be adjusted with a simple and low-cost configuration. Also in the present invention, different from the magnetic head adjusting mechanism described in the conventional example Ri, complete the adjustment at one time because the interdependency does not occur between the height adjustment and X positioning of the magnetic head There is an effect that can be made.
[Brief description of the drawings]
FIG. 1 is a perspective view of a magnetic head adjustment mechanism according to a first embodiment of the present invention.
FIG. 2 is a side view of the magnetic head adjustment mechanism of FIG.
FIG. 3 is a front view of the magnetic head adjustment mechanism of FIG. 1;
4 is a plan view of the magnetic head adjustment mechanism of FIG. 1. FIG.
FIG. 5 is a perspective view of a magnetic head adjustment mechanism according to a second embodiment of the present invention.
FIG. 6 is a perspective view of a magnetic head adjustment mechanism according to Embodiment 3 of the present invention.
7 is a side view of the magnetic head adjustment mechanism of FIG. 6. FIG.
FIG. 8 is a perspective view of a magnetic head adjustment mechanism according to Embodiment 4 of the present invention.
FIG. 9 is a perspective view of a magnetic head adjustment mechanism according to a fifth embodiment of the present invention.
10 is a side view of the magnetic head adjustment mechanism of FIG. 9. FIG.
FIG. 11 is a side view of a conventional magnetic head adjustment mechanism.
FIG. 12 is a front view of a conventional magnetic head adjustment mechanism.
FIG. 13 is a plan view of a conventional magnetic head adjustment mechanism.
[Explanation of symbols]
1 magnetic head, 2 base, 3 base sheet metal, 4 spring, 5 screws, 6 tilt adjustment screw, 7 azimuth adjustment screw, 8 compression torsion spring, 12 threaded shaft, 13 taper nut, 14 deck base, 15 compression torsion spring Stop part, 16 Magnetic head adjustment mechanism support part, 21 Height adjustment screw, 22 Height adjustment sheet metal fixing screw, 23 Height adjustment sheet metal, 24 Base sheet metal fixing screw, 25 Base sheet metal mounting boss.

Claims

In a magnetic head adjustment mechanism for adjusting the posture and height of a magnetic head for recording a signal on a magnetic recording medium or reproducing a signal from the recording medium,
A base for fixing the magnetic head;
A base sheet metal that supports the pedestal in an adjustable manner;
First biasing means for biasing the pedestal to the base sheet metal;
A plurality of adjustment screws for screwing into the base and having a tip abutting against the base sheet metal, or through the base and screwing into the base sheet metal to adjust the posture of the magnetic head fixed to the base;
A height adjusting sheet metal disposed between the pedestal and the base sheet metal, one end fixed to the base sheet metal, and the other end abutted to give a biasing force to the pedestal;
A magnetic head adjusting mechanism comprising: a height adjusting screw that is screwed or penetrated into the tip of the other end of the height adjusting plate and the tip of which is in contact with or screwed with the base plate.

A concave portion is formed in a portion of the pedestal close to the front surface of the magnetic head, a convex portion is formed in a portion of the height adjusting sheet metal that contacts the pedestal, and the concave portion and the convex portion are engaged. The magnetic head adjustment mechanism according to claim 1.

A support part that abuts on the base sheet metal and defines a reference height before adjustment of the magnetic head, and a fixed part that is provided to face the support part and that serves as a rotation axis of the base sheet metal and fixes the base sheet metal 2. A screw, a nut having a tapered surface that regulates a rotational position of the base sheet metal, and second urging means for urging the base sheet metal to the tapered surface of the nut. The magnetic head adjustment mechanism described.

2. The magnetic head adjusting mechanism according to claim 1, wherein the height adjusting sheet metal is constituted by a part of the base sheet metal.

2. The magnetic head adjusting mechanism according to claim 1, wherein the first urging means is a compression spring disposed around shafts of the plurality of adjusting screws.

2. The magnetic head adjusting mechanism according to claim 1, wherein the first urging means is a sheet metal having elasticity that is screwed into shafts of the plurality of adjusting screws.

7. The magnetic head adjusting mechanism according to claim 6, wherein the sheet metal is constituted by a part of the base sheet metal.

In a magnetic head adjustment mechanism for adjusting the posture and height of a magnetic head for recording a signal on a magnetic recording medium or reproducing a signal from the recording medium,
A base for fixing the magnetic head;
A base sheet metal having a plurality of U -shaped bent portions and supporting the pedestal in an adjustable manner;
Adjusting screws for adjusting the posture or height position of the magnetic head provided corresponding to each of the bent portions and fixed to the pedestal;
With
Each of the adjusting screws penetrates the pedestal and each of the corresponding bent portions and is screwed into the base sheet metal, and the bent portions abut to apply a biasing force to the pedestal. mechanism.