JP2004156740A - Gear device and disk device - Google Patents

Gear device and disk device Download PDF

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Publication number
JP2004156740A
JP2004156740A JP2002324247A JP2002324247A JP2004156740A JP 2004156740 A JP2004156740 A JP 2004156740A JP 2002324247 A JP2002324247 A JP 2002324247A JP 2002324247 A JP2002324247 A JP 2002324247A JP 2004156740 A JP2004156740 A JP 2004156740A
Authority
JP
Japan
Prior art keywords
gear
gear member
coil spring
mating
support shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002324247A
Other languages
Japanese (ja)
Inventor
Kenji Urushibara
賢治 漆原
Yuji Yamaguchi
雄司 山口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2002324247A priority Critical patent/JP2004156740A/en
Publication of JP2004156740A publication Critical patent/JP2004156740A/en
Pending legal-status Critical Current

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  • Gears, Cams (AREA)
  • Moving Of Heads (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gear device which can suppress occurrence of noises and shocks when vibrations are applied from the outside. <P>SOLUTION: The gear device is provided with a gear 210, a support shaft 281 to rotatably support the gear 210, and a case 280 and a fastening member 290 which regulate the movement of the gear 210 in the extending direction of a rotary shaft 211 of the gear 210. The gear 210 has a gear member 220 and a gear member 230 which are relatively rotatably supported by the support shaft 281 around the rotary shaft 211 and a coil spring 240, by which the gear member 220 and the gear member 230 are energized in the direction that the gear member 220 and the gear member 230 are relatively rotated. The gear member 220 and the gear member 230 are energized by the coil spring 240 in the direction of separating from each other by being supported by the support shaft 281 relatively movably in the extending direction of the rotary shaft 211. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、動力の伝達に使用される歯車装置と、この歯車装置を備えたディスク装置とに関する。
【0002】
【従来の技術】
従来、動力の伝達に使用される歯車装置として、図14及び図15に示すような歯車装置900が知られている(例えば、特許文献1参照。)。
【0003】
歯車装置900は、歯車910と、歯車910を回転可能に支持する支持軸920と、歯車910の回転軸911の矢印911aで示す延在方向への歯車910の移動を規制する移動規制部931及び移動規制部932とを備えている。
【0004】
歯車910は、支持軸920を挿入した中心孔912aが形成された歯車部材912と、支持軸920を挿入した中心孔913aが形成された歯車部材913とを有している。ここで、歯車部材912及び歯車部材913は、回転軸911を中心に相対的に回転可能に支持軸920に支持されている。
【0005】
また、歯車910は、歯車部材912及び歯車部材913が相対的に回転する方向に歯車部材912及び歯車部材913を付勢したコイルばね914を有している。
【0006】
そして、歯車部材912及び歯車部材913が相対的に回転する方向にコイルばね914が歯車部材912及び歯車部材913を付勢することによって、歯車910と図示していない相手歯車とを噛み合わせたときに歯車910と相手歯車との間のバックラッシを除去している。
【0007】
【特許文献1】
特開2001−330106号公報(第7−8頁、第3−4図)
【0008】
【発明が解決しようとする課題】
しかしながら、上記従来の歯車装置900においては、外部から振動が加えられたとき、矢印911aで示す方向に歯車910が移動して移動規制部931又は移動規制部932に衝突するので、騒音及び衝撃が発生するという問題が有った。
【0009】
そこで、本発明は、外部から振動が加えられたときに騒音及び衝撃の発生を抑制することができる歯車装置を提供することを目的とする。
【0010】
【課題を解決するための手段】
上記課題を解決するために、本発明の歯車装置は、歯車と、前記歯車を回転可能に支持する支持部と、前記歯車の回転軸の延在方向への前記歯車の移動を規制する移動規制部とを備え、前記歯車は、前記回転軸を中心に相対的に回転可能に前記支持部に支持された第一の歯車部材及び第二の歯車部材と、前記第一の歯車部材及び前記第二の歯車部材が相対的に回転する方向に前記第一の歯車部材及び前記第二の歯車部材を付勢したコイルばねとを有し、前記第一の歯車部材及び前記第二の歯車部材は、前記回転軸の延在方向に相対的に移動可能に前記支持部に支持されて互いに離隔する方向に前記コイルばねに付勢された構成を有している。
【0011】
この構成により、本発明の歯車装置は、回転軸の延在方向に相対的に移動可能に支持部に支持されて互いに離隔する方向に第一の歯車部材及び第二の歯車部材がコイルばねに付勢されているので、歯車と移動規制部との間のクリアランスを除去することができ、外部から振動が加えられたときに騒音及び衝撃の発生を抑制することができる。また、本発明の歯車装置は、第一の歯車部材及び第二の歯車部材が相対的に回転する方向にコイルばねが第一の歯車部材及び第二の歯車部材を付勢しているので、歯車と、歯車が噛み合う相手との間のバックラッシを除去することができ、歯車が回転するときに騒音及び衝撃の発生を抑制することができる。
【0012】
また、本発明の歯車装置は、前記歯車は、互いに離隔する方向に前記コイルばねに付勢された前記第一の歯車部材及び前記第二の歯車部材の離隔を防止する離隔防止部を有した構成を有している。
【0013】
この構成により、本発明の歯車装置は、互いに離隔する方向にコイルばねに付勢された第一の歯車部材及び第二の歯車部材の離隔を防止する離隔防止部を歯車が有しているので、予め歯車を組み立てさせた後で全体を組み立てさせることができ、歯車が離隔防止部を有していないときと比較して組み立て作業を容易にすることができる。
【0014】
また、本発明の歯車装置は、前記歯車は、前記回転軸を中心に前記第二の歯車部材に対して回転可能に前記支持部に支持された第三の歯車部材と、前記第二の歯車部材及び前記第三の歯車部材が相対的に回転する方向に前記第二の歯車部材及び前記第三の歯車部材を付勢した追加のコイルばねとを有し、前記第二の歯車部材及び前記第三の歯車部材は、前記回転軸の延在方向に相対的に移動可能に前記支持部に支持されて互いに離隔する方向に前記追加のコイルばねに付勢された構成を有している。
【0015】
この構成により、本発明の歯車装置は、回転軸の延在方向に相対的に移動可能に支持部に支持されて互いに離隔する方向に第二の歯車部材及び第三の歯車部材が追加のコイルばねに付勢されているので、歯車と移動規制部との間のクリアランスを除去することができ、外部から振動が加えられたときに騒音及び衝撃の発生を抑制することができる。また、本発明の歯車装置は、第二の歯車部材及び第三の歯車部材が相対的に回転する方向に追加のコイルばねが第二の歯車部材及び第三の歯車部材を付勢しているので、歯車と、歯車が噛み合う相手との間のバックラッシを除去することができ、歯車が回転するときに騒音及び衝撃の発生を抑制することができる。
【0016】
また、本発明の歯車装置は、前記歯車は、互いに離隔する方向に前記コイルばねに付勢された前記第一の歯車部材及び前記第二の歯車部材の離隔を防止する第一の離隔防止部と、互いに離隔する方向に前記追加のコイルばねに付勢された前記第二の歯車部材及び前記第三の歯車部材の離隔を防止する第二の離隔防止部とを有した構成を有している。
【0017】
この構成により、本発明の歯車装置は、互いに離隔する方向にコイルばねに付勢された第一の歯車部材及び第二の歯車部材の離隔を防止する第一の離隔防止部と、互いに離隔する方向に追加のコイルばねに付勢された第二の歯車部材及び第三の歯車部材の離隔を防止する第二の離隔防止部とを歯車が有しているので、予め歯車を組み立てさせた後で全体を組み立てさせることができ、歯車が第一の離隔防止部及び第二の離隔防止部を有していないときと比較して組み立て作業を容易にすることができる。
【0018】
また、本発明の歯車装置は、前記移動規制部は、前記歯車と噛み合う相手歯車と、前記回転軸の延在方向への前記相手歯車の移動を規制する相手歯車規制部とを有し、前記相手歯車は、前記歯車に係合することによって前記回転軸の延在方向への前記歯車の移動を規制する係合部を有した構成を有している。
【0019】
この構成により、本発明の歯車装置は、歯車と噛み合う相手歯車と、回転軸の延在方向への相手歯車の移動を規制する相手歯車規制部とを移動規制部が有し、歯車に係合することによって回転軸の延在方向への歯車の移動を規制する係合部を相手歯車が有しているので、相手歯車と相手歯車規制部との間のクリアランスを除去することができ、外部から振動が加えられたときに騒音及び衝撃の発生を抑制することができる。
【0020】
また、本発明のディスク装置は、歯車装置を備えた構成を有している。
【0021】
この構成により、本発明のディスク装置は、外部から振動が加えられたときや歯車が回転するときに騒音及び衝撃の発生を歯車装置が抑制できるので、従来と比較して動作の静粛性及び安定性を向上することができる。
【0022】
【発明の実施の形態】
以下、本発明の実施の形態について、図面を用いて説明する。
【0023】
(第1の実施の形態)
【0024】
まず、第1の実施の形態に係る歯車装置及びディスク装置の構成について説明する。
【0025】
図1に示すように、本実施の形態に係るディスク装置100は、ディスク800を回転させるスピンドルモータ110と、ディスク800に対して記録再生を行う光ピックアップ120と、光ピックアップ120に固定されたラック130と、光ピックアップ120に形成された図示していない穴に挿入されて光ピックアップ120を案内するガイド軸140とを備えている。
【0026】
また、ディスク装置100は、光ピックアップ120を駆動するためのトラバースモータ150と、トラバースモータ150の駆動軸150aに固定された歯車160と、ラック130及び歯車160の間で動力の伝達を行う本実施の形態に係る歯車装置200とを備えている。
【0027】
ここで、歯車装置200は、歯車210と、ラック130及び歯車210の双方と噛み合う相手歯車250と、歯車160及び歯車210の双方と噛み合う相手歯車260とを備えている。
【0028】
また、歯車装置200は、図2及び図3に示すように、歯車210を回転可能に支持する支持部としての支持軸281が設けられた筐体280と、支持軸281に固定された締結部材290とを備えている。また、筐体280は、相手歯車250及び相手歯車260(図1参照)を回転可能に支持する図示していない支持軸を設けている。
【0029】
ここで、筐体280は、歯車210の回転軸211の延在方向のうち矢印211aで示す方向への歯車210の移動を規制する移動規制部を構成しており、締結部材290は、矢印211aで示す方向の逆方向である矢印211bで示す方向への歯車210の移動を規制する移動規制部を構成している。
【0030】
また、歯車210は、第一の歯車部材としての歯車部材220と、第二の歯車部材としての歯車部材230とを有している。
【0031】
ここで、歯車部材230は、支持軸281を挿入した中心孔231が内周部分に形成されて外周部分にカム溝232が形成された芯棒233と、突起234とを有している。カム溝232は、図4に示すように、矢印211a及び矢印211bで示す方向に略平行な壁部232a、壁部232b、壁部232c、壁部232d、壁部232e及び壁部232fと、矢印211a及び矢印211bで示す方向に略直交した壁部232g、壁部232h、壁部232i、壁部232j及び壁部232kで形成されている。
【0032】
また、歯車部材220は、図2及び図3に示すように、歯車部材230の芯棒233を挿入した中心孔221が内周部分に形成された芯棒222と、芯棒222の内周部分に設けられて歯車部材230のカム溝232で芯棒233に係合する突起223と、突起224とを有している。
【0033】
なお、歯車210が支持軸281に支持されて筐体280及び締結部材290によって矢印211a及び矢印211bで示す方向の移動を規制されているとき、図4に示すように、突起223はカム溝232に対して位置223aにある。
【0034】
ここで、芯棒233の周方向での位置223aにおけるカム溝232の幅230aは、突起223の直径より大きくなっているので、歯車部材220及び歯車部材230は、回転軸211を中心に矢印202及び矢印203(図2参照)で示す方向に相対的に回転可能に支持軸281に支持されている。
【0035】
また、芯棒233の軸方向、即ち、矢印211a及び矢印211bで示す方向での位置223aにおけるカム溝232の幅230bも、突起223の直径より大きくなっているので、歯車部材220及び歯車部材230は、矢印211a及び矢印211bで示す方向に相対的に移動可能に支持軸281に支持されている。
【0036】
また、図2及び図3に示すように、歯車210は、歯車部材220及び歯車部材230の間に設けられて歯車部材220の芯棒222を内側に挿入したコイルばね240を有している。
【0037】
ここで、コイルばね240は、一端側に設けられて歯車部材220の突起224に係合した腕241と、他端側に設けられて歯車部材230の突起234に係合した腕242とを有しており、歯車部材220及び歯車部材230が相対的に回転する方向のうち矢印202で示す方向に歯車部材230に対して歯車部材220を付勢しており、矢印202で示す方向の逆方向である矢印203で示す方向に歯車部材220に対して歯車部材230を付勢している。
【0038】
したがって、歯車装置200は、図5に示すように歯車210と相手歯車250及び相手歯車260との間のバックラッシを除去している。
【0039】
また、コイルばね240は、図3に示すように、長さ240aがコイルばね240の自由長より短くなっており、歯車部材220を歯車部材230から離隔する矢印211bで示す方向に付勢して締結部材290に密着させており、歯車部材230を歯車部材220から離隔する矢印211aで示す方向に付勢して筐体280に密着させている。
【0040】
したがって、歯車装置200は、歯車210と筐体280及び締結部材290との間のクリアランスを除去している。
【0041】
次に、本実施の形態に係る歯車装置の組み立てについて説明する。
【0042】
まず、歯車部材230の芯棒233がコイルばね240の内側に挿入されてコイルばね240の腕242が歯車部材230の突起234に係合するように、歯車部材230に対してコイルばね240が設置される。
【0043】
次いで、歯車部材230の芯棒233が歯車部材220の中心孔221に挿入され、歯車部材220の突起223が、図4に示すように、歯車部材230のカム溝232に対して位置223bから位置223c、位置223d及び位置223eを介して位置223fまで移動させられる。
【0044】
なお、歯車部材230に対して歯車部材220が近接するように移動させられることによって、歯車部材230のカム溝232に対して位置223bから位置223cまで歯車部材220の突起223が移動させられると、歯車部材220とコイルばね240との係合が開始するので、歯車部材220及び歯車部材230は、コイルばね240によって互いに離隔する方向に付勢される。
【0045】
また、歯車部材230に対して歯車部材220が回転させられることによって、歯車部材220の突起223が歯車部材230の壁部232hに係合しながら歯車部材230のカム溝232に対して位置223cから位置223dまで移動させられると、歯車部材220の突起224とコイルばね240の腕241との係合が開始するので、歯車部材220及び歯車部材230は、コイルばね240によって相対的に回転する方向に付勢される。
【0046】
また、歯車部材230に対して歯車部材220が近接するように移動させられることによって、歯車部材220の突起223が歯車部材230の壁部232dに係合しながら歯車部材230のカム溝232に対して位置223dから位置223eまで移動させられると、歯車部材220及び歯車部材230がコイルばね240によって相対的に回転する方向に付勢されているので、歯車部材220の突起223は、コイルばね240の付勢力によって位置223eから位置223fまで移動して、歯車部材230の壁部232eに係合して停止する。
【0047】
ここで、突起223は、位置223fにあるとき、歯車部材220及び歯車部材230がコイルばね240によって互いに離隔する方向に付勢されているので、コイルばね240の付勢力によって歯車部材230の壁部232iに係合している。即ち、歯車部材220の突起223と歯車部材230の壁部232iとは、互いに離隔する方向にコイルばね240に付勢された歯車部材220及び歯車部材230の離隔を防止する離隔防止部を構成している。
【0048】
歯車部材220の突起223が歯車部材230のカム溝232に対して位置223fまで移動させられると、上述したように、コイルばね240の付勢力によって歯車部材220の突起223が歯車部材230の壁部232e及び壁部232iに係合するので、歯車部材220及び歯車部材230は互いに固定される。
【0049】
以上のように歯車210が組み立てられると、図1に示すように歯車210と噛み合う相手歯車250が筐体280の図示していない支持軸に回転可能に支持された後、歯車部材230の中心孔231に支持軸281が挿入されて歯車部材230が筐体280に係合するように、歯車210が筐体280に近接する方向に移動させられる。
【0050】
なお、歯車210が筐体280に近接するように移動させられるとき、歯車部材220及び歯車部材230が相対的に回転させられて図4に示すように歯車部材230のカム溝232に対して位置223fから位置223eまで歯車部材220の突起223が移動させられると、図5に示すように歯車210と相手歯車250とが互いに噛み合う。
【0051】
そして、歯車210が筐体280に係合した後、歯車部材220が更に筐体280に近接するように移動させられると、図4に示すように歯車部材230のカム溝232に対して位置223eから位置223aまで歯車部材220の突起223が移動させられる。
【0052】
最後に、支持軸281に締結部材290が固定され、相手歯車260が歯車210と噛み合うように筐体280の図示していない支持軸に回転可能に支持されることによって、歯車装置200は組み立てられる。
【0053】
次に、本実施の形態に係る歯車装置及びディスク装置の動作について説明する。
【0054】
ディスク装置100は、トラバースモータ150が回転すると、歯車160及び歯車装置200を介して動力がラック130に伝達され、ラック130とともに光ピックアップ120がガイド軸140にガイドされながら移動する。
【0055】
ここで、歯車装置200は、コイルばね240によって歯車210と筐体280及び締結部材290との間のクリアランスを除去することができているので、外部から振動が加えられたときに騒音及び衝撃の発生を抑制することができる。
【0056】
また、歯車装置200は、コイルばね240によって歯車210と相手歯車250及び相手歯車260との間のバックラッシを除去することができているので、歯車210が回転するときに騒音及び衝撃の発生を抑制することができる。
【0057】
したがって、ディスク装置100は、従来と比較して動作の静粛性及び安定性を向上することができる。
【0058】
また、歯車装置200は、互いに離隔する方向にコイルばね240に付勢された歯車部材220及び歯車部材230の離隔を防止する突起223及び壁部232iを歯車210が有しているので、予め歯車210を組み立てさせた後で全体を組み立てさせることができ、歯車210が突起223及び壁部232iを有していないときと比較して組み立て作業を容易にすることができる。
【0059】
なお、歯車装置200は、本実施の形態において、光ピックアップ120を駆動するための動力の伝達に使用されていたが、本発明によれば、ディスク800をスピンドルモータ110まで搬送するための動力等、様々な動力の伝達に使用されることができる。
【0060】
また、歯車装置200は、本実施の形態において、歯車210、相手歯車250及び相手歯車260の3つの歯車を備えた構成であったが、本発明によれば、歯車210を含む1つ以上の歯車を備えた構成であれば良い。
【0061】
また、歯車装置200は、本実施の形態において、締結部材290が支持軸281に係合することによって歯車210が筐体280に固定される構成であったが、本発明によれば、支持軸281と係合する弾性部材を歯車210が設け、この弾性部材が支持軸281に係合することによって歯車210が筐体280に固定される構成であっても良い。
【0062】
(第2の実施の形態)
【0063】
まず、第2の実施の形態に係る歯車装置及びディスク装置の構成について説明する。
【0064】
なお、本実施の形態に係るディスク装置の構成のうち、第1の実施の形態に係るディスク装置100(図1参照)の構成と同様な構成は、第1の実施の形態に係るディスク装置100の構成と同一の符号を付して詳細な説明を省略する。
【0065】
本実施の形態に係るディスク装置は、第1の実施の形態に係るディスク装置100において、歯車装置200(図1参照)に代えて本実施の形態に係る歯車装置を備えたものである。
【0066】
本実施の形態に係る歯車装置は、図6及び図7に示すように、歯車210と、ラック130(図1参照)及び歯車210の双方と噛み合う相手歯車350と、相手歯車260(図1参照)とを備えている。
【0067】
また、本実施の形態に係る歯車装置は、歯車210を回転可能に支持する支持部としての支持軸381が設けられた筐体380と、支持軸381に固定された締結部材390とを備えている。また、筐体380は、相手歯車350を回転可能に支持する支持軸382と、相手歯車260を回転可能に支持する図示していない支持軸とを設けている。
【0068】
また、相手歯車350は、歯車210に係合することによって回転軸211の延在方向のうち矢印211aで示す方向への歯車210の移動を規制する係合部351を有している。
【0069】
即ち、相手歯車350及び筐体380は、矢印211aで示す方向への歯車210の移動を規制する移動規制部を構成しており、筐体380は、矢印211aで示す方向への相手歯車350の移動を規制する相手歯車規制部を構成している。また、締結部材390は、矢印211aで示す方向の逆方向である矢印211bで示す方向への歯車210の移動を規制する移動規制部を構成している。
【0070】
なお、コイルばね240は、歯車部材220を歯車部材230から離隔する矢印211bで示す方向に付勢して締結部材390に密着させている。また、コイルばね240は、歯車部材230を歯車部材220から離隔する矢印211aで示す方向に付勢して相手歯車350に密着させて、相手歯車350を更に筐体380に密着させている。
【0071】
したがって、本実施の形態に係る歯車装置は、歯車210と相手歯車350及び締結部材290との間のクリアランスと、相手歯車350と筐体380との間のクリアランスとを除去している。
【0072】
次に、本実施の形態に係る歯車装置の組み立てについて説明する。
【0073】
第1の実施の形態において説明したように歯車210が組み立てられると、相手歯車350が筐体380の支持軸382に回転可能に支持される。
【0074】
そして、第1の実施の形態において説明した組み立てと同様に、歯車210が相手歯車350と噛み合うように筐体380の支持軸381に回転可能に支持された後、締結部材390が支持軸381に固定される。
【0075】
最後に、相手歯車260が歯車210と噛み合うように筐体380の図示していない支持軸に回転可能に支持されることによって、本実施の形態に係る歯車装置は組み立てられる。
【0076】
以上に説明したように、本実施の形態に係る歯車装置は、コイルばね240によって、歯車210と相手歯車350及び締結部材390との間のクリアランスと、相手歯車350と筐体380との間のクリアランスとを除去することができているので、外部から振動が加えられたときに騒音及び衝撃の発生を抑制することができる。
【0077】
したがって、ディスク装置100は、従来と比較して動作の静粛性及び安定性を向上することができる。
【0078】
なお、本実施の形態に係る歯車装置は、締結部材390が支持軸381に係合することによって歯車210が相手歯車350に固定される構成であったが、本発明によれば、支持軸381と係合する弾性部材を歯車210が設け、この弾性部材が支持軸381に係合することによって歯車210が相手歯車350に固定される構成であっても良い。
【0079】
(第3の実施の形態)
【0080】
まず、第3の実施の形態に係る歯車装置及びディスク装置の構成について説明する。
【0081】
なお、本実施の形態に係るディスク装置の構成のうち、第1の実施の形態に係るディスク装置100(図1参照)の構成と同様な構成は、第1の実施の形態に係るディスク装置100の構成と同一の符号を付して詳細な説明を省略する。
【0082】
本実施の形態に係るディスク装置は、第1の実施の形態に係るディスク装置100において、歯車装置200(図1参照)に代えて本実施の形態に係る歯車装置を備えたものである。
【0083】
本実施の形態に係る歯車装置は、図8及び図9に示すように、歯車410と、相手歯車250及び相手歯車260(図1参照)とを備えている。
【0084】
また、本実施の形態に係る歯車装置は、歯車410を回転可能に支持する支持部としての支持軸481が設けられた筐体480と、支持軸481に固定された締結部材490とを備えている。また、筐体480は、相手歯車250及び相手歯車260を回転可能に支持する図示していない支持軸を設けている。
【0085】
ここで、筐体480は、歯車410の回転軸411の延在方向のうち矢印411aで示す方向への歯車410の移動を規制する移動規制部を構成しており、締結部材490は、矢印411aで示す方向の逆方向である矢印411bで示す方向への歯車410の移動を規制する移動規制部を構成している。
【0086】
また、歯車410は、第一の歯車部材としての歯車部材420と、第二の歯車部材としての歯車部材430と、第三の歯車部材としての歯車部材440とを有しており、図示しているように異なる直径の2つの歯車から構成された2段歯車になっている。
【0087】
ここで、歯車部材440は、支持軸481を挿入した中心孔441が内周部分に形成されて外周部分にカム溝442が形成された芯棒443と、突起444とを有している。
【0088】
また、歯車部材430は、歯車部材440の芯棒443を挿入した中心孔431が内周部分に形成された芯棒432と、芯棒432の内周部分に設けられて歯車部材440のカム溝442で芯棒443に係合する突起433と、突起434と、支持軸481を挿入した中心孔435が内周部分に形成されて外周部分にカム溝436が形成された芯棒437と、突起438とを有している。
【0089】
また、歯車部材420は、歯車部材430の芯棒437を挿入した中心孔421が内周部分に形成された芯棒422と、芯棒422の内周部分に設けられて歯車部材430のカム溝436で芯棒437に係合する突起423と、突起424とを有している。
【0090】
なお、カム溝436及びカム溝442の形状は、図4に示すカム溝232の形状と同様である。
【0091】
ここで、歯車部材420及び歯車部材430は、第1の実施の形態に係る歯車部材220及び歯車部材230と同様に、カム溝436の幅と突起423の直径との関係から、回転軸411を中心に矢印402及び矢印403で示す方向に相対的に回転可能に支持軸481に支持されており、矢印411a及び矢印411bで示す方向に相対的に移動可能に支持軸481に支持されている。
【0092】
同様に、歯車部材430及び歯車部材440は、カム溝442の幅と突起433の直径との関係から、回転軸411を中心に矢印402及び矢印403で示す方向に相対的に回転可能に支持軸481に支持されており、矢印411a及び矢印411bで示す方向に相対的に移動可能に支持軸481に支持されている。
【0093】
また、歯車410は、歯車部材420及び歯車部材430の間に設けられて歯車部材420の芯棒422を内側に挿入したコイルばね450と、歯車部材430及び歯車部材440の間に設けられて歯車部材430の芯棒432を内側に挿入した追加のコイルばねとしてのコイルばね460とを有している。
【0094】
ここで、コイルばね450は、一端側に設けられて歯車部材420の突起424に係合した腕451と、他端側に設けられて歯車部材430の突起438に係合した腕452とを有しており、歯車部材420及び歯車部材430が相対的に回転する方向のうち矢印402で示す方向に歯車部材430に対して歯車部材420を付勢しており、矢印402で示す方向の逆方向である矢印403で示す方向に歯車部材420に対して歯車部材430を付勢している。
【0095】
また、コイルばね460は、一端側に設けられて歯車部材430の突起434に係合した腕461と、他端側に設けられて歯車部材440の突起444に係合した腕462とを有しており、歯車部材430及び歯車部材440が相対的に回転する方向のうち矢印402で示す方向に歯車部材440に対して歯車部材430を付勢しており、矢印402で示す方向の逆方向である矢印403で示す方向に歯車部材430に対して歯車部材440を付勢している。
【0096】
したがって、本実施の形態に係る歯車装置は、図10及び図11に示すように歯車410と相手歯車250及び相手歯車260との間のバックラッシを除去している。
【0097】
また、コイルばね450は、図9に示すように、長さ450aがコイルばね450の自由長より短くなっており、歯車部材420を歯車部材430から離隔する矢印411bで示す方向に付勢して締結部材490に密着させており、歯車部材430を歯車部材420から離隔する矢印411aで示す方向に付勢している。
【0098】
また、コイルばね460は、長さ460aがコイルばね460の自由長より短くなっており、歯車部材430を歯車部材440から離隔する矢印411bで示す方向に付勢しており、歯車部材440を歯車部材430から離隔する矢印411aで示す方向に付勢して筐体480に密着させている。
【0099】
したがって、本実施の形態に係る歯車装置は、歯車410と筐体480及び締結部材490との間のクリアランスを除去している。
【0100】
なお、歯車部材420の突起423とカム溝436を形成した歯車部材430の図示してない壁部とは、互いに離隔する方向にコイルばね450に付勢された歯車部材420及び歯車部材430の離隔を防止する第一の離隔防止部を構成している。
【0101】
また、歯車部材430の突起433とカム溝442を形成した歯車部材440の図示してない壁部とは、互いに離隔する方向にコイルばね460に付勢された歯車部材430及び歯車部材440の離隔を防止する第二の離隔防止部を構成している。
【0102】
次に、本実施の形態に係る歯車装置の組み立てについて説明する。
【0103】
第1の実施の形態において説明した歯車210の組み立てと同様にして歯車410が組み立てられると、相手歯車260が筐体480の図示していない支持軸に回転可能に支持される。
【0104】
そして、第1の実施の形態において説明した組み立てと同様に、歯車410が相手歯車260と噛み合うように筐体480の支持軸481に回転可能に支持された後、締結部材490が支持軸481に固定される。
【0105】
最後に、歯車410と相手歯車250とが噛み合うように相手歯車250が筐体480の図示していない支持軸に回転可能に支持されることによって、本実施の形態に係る歯車装置は組み立てられる。
【0106】
以上に説明したように、本実施の形態に係る歯車装置は、コイルばね450及びコイルばね460によって歯車410と筐体480及び締結部材490との間のクリアランスを除去することができているので、外部から振動が加えられたときに騒音及び衝撃の発生を抑制することができる。
【0107】
また、本実施の形態に係る歯車装置は、コイルばね450及びコイルばね460によって歯車410と相手歯車250及び相手歯車260との間のバックラッシを除去することができているので、歯車410が回転するときに騒音及び衝撃の発生を抑制することができる。
【0108】
したがって、ディスク装置100は、従来と比較して動作の静粛性及び安定性を向上することができる。
【0109】
また、本実施の形態に係る歯車装置は、突起423及び歯車部材430の図示していない壁部と、突起433及び歯車部材440の図示していない壁部とを歯車410が有しているので、予め歯車410を組み立てさせた後で全体を組み立てさせることができ、歯車410が突起423及び歯車部材430の図示していない壁部と、突起433及び歯車部材440の図示していない壁部とを有していないときと比較して組み立て作業を容易にすることができる。
【0110】
なお、歯車410は、異なる直径の2つの歯車から構成された2段歯車になっていたが、本発明によれば、歯車部材420、歯車部材430及び歯車部材440の直径が同一であっても良い。
【0111】
また、本実施の形態に係る歯車装置は、締結部材490が支持軸481に係合することによって歯車410が筐体480に固定される構成であったが、本発明によれば、支持軸481と係合する弾性部材を歯車410が設け、この弾性部材が支持軸481に係合することによって歯車410が筐体480に固定される構成であっても良い。
【0112】
(第4の実施の形態)
【0113】
まず、第4の実施の形態に係る歯車装置及びディスク装置の構成について説明する。
【0114】
なお、本実施の形態に係るディスク装置の構成のうち、第3の実施の形態に係るディスク装置の構成と同様な構成は、第3の実施の形態に係るディスク装置の構成と同一の符号を付して詳細な説明を省略する。
【0115】
本実施の形態に係るディスク装置は、第3の実施の形態に係るディスク装置において、第3の実施の形態に係る歯車装置に代えて本実施の形態に係る歯車装置を備えたものである。
【0116】
本実施の形態に係る歯車装置は、図12及び図13に示すように、歯車410と、ラック130(図1参照)及び歯車410の双方と噛み合う相手歯車550と、歯車160(図1参照)及び歯車410の双方と噛み合う相手歯車560とを備えている。
【0117】
また、本実施の形態に係る歯車装置は、歯車410を回転可能に支持する支持部としての支持軸581と、相手歯車550を回転可能に支持する支持軸582と、相手歯車560を回転可能に支持する支持軸583とが設けられた筐体580を備えている。また、本実施の形態に係る歯車装置は、支持軸582に固定された締結部材590を備えている。
【0118】
また、相手歯車560は、歯車410に係合することによって回転軸411の延在方向のうち矢印411aで示す方向への歯車410の移動を規制する係合部561を有しており、相手歯車550は、歯車410に係合することによって矢印411aで示す方向の逆方向である矢印411bで示す方向への歯車410の移動を規制する係合部551を有している。
【0119】
即ち、相手歯車550及び締結部材590は、矢印411bで示す方向への歯車410の移動を規制する移動規制部を構成しており、締結部材590は、矢印411bで示す方向への相手歯車550の移動を規制する相手歯車規制部を構成している。また、相手歯車560及び筐体580は、矢印411aで示す方向への歯車410の移動を規制する移動規制部を構成しており、筐体580は、矢印411aで示す方向への相手歯車560の移動を規制する相手歯車規制部を構成している。
【0120】
なお、コイルばね450及びコイルばね460は、歯車部材420を歯車部材430及び歯車部材440から離隔する矢印411bで示す方向に付勢して相手歯車550に密着させて、相手歯車550を更に締結部材590に密着させている。また、コイルばね460及びコイルばね450は、歯車部材440を歯車部材430及び歯車部材420から離隔する矢印411aで示す方向に付勢して相手歯車560に密着させて、相手歯車560を更に筐体580に密着させている。
【0121】
したがって、本実施の形態に係る歯車装置は、歯車410と相手歯車550及び相手歯車560との間のクリアランスと、相手歯車550と締結部材290とのクリアランスと、相手歯車560と筐体580との間のクリアランスとを除去している。
【0122】
次に、本実施の形態に係る歯車装置の組み立てについて説明する。
【0123】
第3の実施の形態において説明したように歯車410が組み立てられると、相手歯車560が筐体580の支持軸583に回転可能に支持される。
【0124】
そして、第1の実施の形態において説明した組み立てと同様に、歯車410が相手歯車560と噛み合うように筐体580の支持軸581に回転可能に支持された後、歯車410と相手歯車550とが噛み合うように相手歯車550が筐体580の支持軸582に回転可能に支持される。
【0125】
最後に、締結部材590が支持軸582に固定されることによって、本実施の形態に係る歯車装置は組み立てられる。
【0126】
以上に説明したように、本実施の形態に係る歯車装置は、コイルばね450及びコイルばね460によって、歯車410と相手歯車550及び相手歯車560との間のクリアランスと、相手歯車550と締結部材290とのクリアランスと、相手歯車560と筐体580との間のクリアランスとを除去することができているので、外部から振動が加えられたときに騒音及び衝撃の発生を抑制することができる。
【0127】
したがって、本実施の形態に係るディスク装置は、従来と比較して動作の静粛性及び安定性を向上することができる。
【0128】
なお、本実施の形態に係る歯車装置は、締結部材590が支持軸582に係合することによって相手歯車550が歯車410に固定される構成であったが、本発明によれば、支持軸582と係合する弾性部材を相手歯車550が設け、この弾性部材が支持軸582に係合することによって相手歯車550が歯車410に固定される構成であっても良い。
【0129】
【発明の効果】
以上に説明したように、本発明によれば、外部から振動が加えられたときに騒音及び衝撃の発生を抑制することができる歯車装置を提供することができる。
【図面の簡単な説明】
【図1】本発明の第1の実施の形態に係るディスク装置の上面図
【図2】図1に示す歯車装置の一部の上面図
【図3】図2の矢印Aで示す方向から見た歯車装置の一部の断面図
【図4】図3に示す芯棒の外周面の展開図
【図5】図2に示す歯車と相手歯車との一部の上面図
【図6】本発明の第2の実施の形態に係る歯車装置の一部の上面図
【図7】図6の矢印Bで示す方向から見た歯車装置の一部の断面図
【図8】本発明の第3の実施の形態に係る歯車装置の一部の上面図
【図9】図8の矢印Cで示す方向から見た歯車装置の一部の断面図
【図10】図8に示す歯車と相手歯車との一部の上面図
【図11】図8に示す歯車と図10に示す相手歯車とは異なる相手歯車との一部の上面図
【図12】本発明の第4の実施の形態に係る歯車装置の一部の上面図
【図13】図12の矢印Dで示す方向から見た歯車装置の一部の断面図
【図14】従来の歯車装置の上面図
【図15】図14に示す歯車装置の側面断面図
【符号の説明】
100 ディスク装置
200 歯車装置
210 歯車
211 回転軸
220 歯車部材(第一の歯車部材)
223 突起(離隔防止部)
230 歯車部材(第二の歯車部材)
232i 壁部(離隔防止部)
240 コイルばね
280 筐体(移動規制部)
281 支持軸(支持部)
290 締結部材(移動規制部)
350 相手歯車(移動規制部)
351 係合部
380 筐体(移動規制部、相手歯車規制部)
381 支持軸(支持部)
390 締結部材(移動規制部)
410 歯車
411 回転軸
420 歯車部材(第一の歯車部材)
423 突起(第一の離隔防止部)
430 歯車部材(第二の歯車部材)
433 突起(第二の離隔防止部)
440 歯車部材(第三の歯車部材)
450 コイルばね
460 コイルばね(追加のコイルばね)
480 筐体(移動規制部)
481 支持軸(支持部)
490 締結部材(移動規制部)
550 相手歯車(移動規制部)
551 係合部
560 相手歯車(移動規制部)
561 係合部
580 筐体(移動規制部、相手歯車規制部)
581 支持軸(支持部)
590 締結部材(移動規制部、相手歯車規制部)
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a gear device used for transmitting power and a disk device provided with the gear device.
[0002]
[Prior art]
Conventionally, as a gear device used for transmitting power, a gear device 900 as shown in FIGS. 14 and 15 is known (for example, see Patent Document 1).
[0003]
The gear device 900 includes a gear 910, a support shaft 920 that rotatably supports the gear 910, a movement restricting portion 931 that regulates movement of the gear 910 in the direction in which the rotation shaft 911 of the gear 910 extends in the direction indicated by the arrow 911 a. A movement restricting portion 932.
[0004]
The gear 910 includes a gear member 912 having a center hole 912a into which the support shaft 920 is inserted, and a gear member 913 having a center hole 913a into which the support shaft 920 is inserted. Here, the gear member 912 and the gear member 913 are supported by the support shaft 920 so as to be relatively rotatable about the rotation shaft 911.
[0005]
The gear 910 includes a coil spring 914 that urges the gear member 912 and the gear member 913 in a direction in which the gear member 912 and the gear member 913 rotate relatively.
[0006]
Then, when the coil spring 914 urges the gear member 912 and the gear member 913 in a direction in which the gear member 912 and the gear member 913 relatively rotate, the gear 910 meshes with a mating gear (not shown). The backlash between the gear 910 and the mating gear is eliminated.
[0007]
[Patent Document 1]
JP 2001-330106 A (Pages 7-8, FIG. 3-4)
[0008]
[Problems to be solved by the invention]
However, in the conventional gear device 900, when vibration is applied from the outside, the gear 910 moves in the direction indicated by the arrow 911a and collides with the movement restricting portion 931 or the movement restricting portion 932, so that noise and impact are reduced. There was a problem that occurred.
[0009]
Therefore, an object of the present invention is to provide a gear device that can suppress generation of noise and impact when vibration is applied from the outside.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a gear device of the present invention includes a gear, a support portion that rotatably supports the gear, and a movement restriction that regulates movement of the gear in a direction in which a rotation axis of the gear extends. Portion, the gear is a first gear member and a second gear member supported by the support portion so as to be relatively rotatable about the rotation axis, the first gear member and the A coil spring that biases the first gear member and the second gear member in a direction in which the second gear member relatively rotates, wherein the first gear member and the second gear member And a structure in which the coil spring is urged in a direction of being separated from each other supported by the supporting portion so as to be relatively movable in an extending direction of the rotation shaft.
[0011]
With this configuration, the gear device of the present invention is configured such that the first gear member and the second gear member are supported by the supporting portion so as to be relatively movable in the direction in which the rotation shaft extends and are separated from each other by the coil spring. Because it is biased, the clearance between the gear and the movement restricting portion can be eliminated, and the generation of noise and impact when external vibration is applied can be suppressed. In the gear device of the present invention, since the coil spring biases the first gear member and the second gear member in a direction in which the first gear member and the second gear member relatively rotate, The backlash between the gear and the partner with which the gear meshes can be eliminated, and noise and impact can be suppressed when the gear rotates.
[0012]
Further, in the gear device according to the present invention, the gear has a separation preventing portion that prevents separation of the first gear member and the second gear member urged by the coil spring in a direction separating from each other. It has a configuration.
[0013]
With this configuration, in the gear device of the present invention, the gear has the separation preventing portion that prevents the first gear member and the second gear member from being separated from each other by the coil spring in the direction separating from each other. The entire gears can be assembled after the gears are assembled in advance, and the assembling work can be facilitated as compared with the case where the gears do not have the separation preventing portions.
[0014]
Further, in the gear device according to the present invention, the gear includes a third gear member rotatably supported by the support portion with respect to the second gear member around the rotation axis; An additional coil spring biasing the second gear member and the third gear member in a direction in which the member and the third gear member rotate relative to each other, the second gear member and the The third gear member has a configuration in which the third gear member is supported by the support portion so as to be relatively movable in the extending direction of the rotation shaft and is urged by the additional coil spring in a direction away from each other.
[0015]
With this configuration, the gear device of the present invention is configured such that the second gear member and the third gear member are provided with an additional coil in a direction in which the second gear member and the third gear member are supported by the supporting portion so as to be relatively movable in the extending direction of the rotation shaft and are separated from each other. Since the spring is urged, the clearance between the gear and the movement restricting portion can be eliminated, and the generation of noise and impact when external vibration is applied can be suppressed. Further, in the gear device of the present invention, the additional coil spring biases the second gear member and the third gear member in a direction in which the second gear member and the third gear member relatively rotate. Therefore, backlash between the gear and the partner with which the gear meshes can be eliminated, and the generation of noise and impact when the gear rotates can be suppressed.
[0016]
Also, in the gear device according to the present invention, the gear is a first separation prevention unit that prevents separation of the first gear member and the second gear member urged by the coil spring in a direction separating from each other. And a second separation preventing portion for preventing separation of the second gear member and the third gear member urged by the additional coil spring in a direction separating from each other. I have.
[0017]
With this configuration, the gear device of the present invention is separated from the first separation preventing portion that prevents separation of the first gear member and the second gear member urged by the coil spring in the direction that separates each other. Since the gear has a second gear member biased by an additional coil spring in the direction and a second separation prevention portion for preventing separation of the third gear member, after the gear is assembled in advance, Can be assembled as a whole, and the assembling work can be facilitated as compared with the case where the gear does not have the first separation preventing portion and the second separation preventing portion.
[0018]
Further, in the gear device of the present invention, the movement restricting portion includes a mating gear that meshes with the gear, and a mating gear restricting portion that restricts movement of the mating gear in the direction in which the rotation shaft extends. The mating gear has a configuration having an engagement portion that regulates movement of the gear in the direction in which the rotation shaft extends by engaging with the gear.
[0019]
With this configuration, the gear device according to the present invention, the movement restricting portion has the mating gear that meshes with the gear and the mating gear restricting portion that restricts the movement of the mating gear in the direction in which the rotation shaft extends, and engages with the gear. By doing so, the mating gear has an engaging portion that regulates the movement of the gear in the direction in which the rotating shaft extends, so that the clearance between the mating gear and the mating gear regulating portion can be eliminated, and The generation of noise and impact when vibration is applied from above can be suppressed.
[0020]
Further, the disk device of the present invention has a configuration provided with a gear device.
[0021]
With this configuration, the disk device of the present invention can suppress the generation of noise and impact when external vibration is applied or the gear rotates, so that the operation is quieter and more stable than in the past. Performance can be improved.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0023]
(First Embodiment)
[0024]
First, the configurations of the gear device and the disk device according to the first embodiment will be described.
[0025]
As shown in FIG. 1, a disk device 100 according to the present embodiment includes a spindle motor 110 for rotating a disk 800, an optical pickup 120 for recording and reproducing on the disk 800, and a rack fixed to the optical pickup 120. 130, and a guide shaft 140 that is inserted into a hole (not shown) formed in the optical pickup 120 and guides the optical pickup 120.
[0026]
Further, the disk device 100 includes a traverse motor 150 for driving the optical pickup 120, a gear 160 fixed to a drive shaft 150 a of the traverse motor 150, and power transmission between the rack 130 and the gear 160. And a gear device 200 according to the embodiment.
[0027]
Here, the gear device 200 includes a gear 210, a mating gear 250 that meshes with both the rack 130 and the gear 210, and a mating gear 260 that meshes with both the gear 160 and the gear 210.
[0028]
As shown in FIGS. 2 and 3, the gear device 200 includes a housing 280 provided with a support shaft 281 as a support unit that rotatably supports the gear 210, and a fastening member fixed to the support shaft 281. 290. The housing 280 is provided with a support shaft (not shown) that rotatably supports the mating gear 250 and the mating gear 260 (see FIG. 1).
[0029]
Here, the housing 280 constitutes a movement restricting portion that restricts the movement of the gear 210 in the direction indicated by the arrow 211a among the extending directions of the rotation shaft 211 of the gear 210, and the fastening member 290 is formed by the arrow 211a. The movement restricting portion restricts the movement of the gear 210 in a direction indicated by an arrow 211b which is a direction opposite to the direction indicated by the arrow.
[0030]
The gear 210 has a gear member 220 as a first gear member and a gear member 230 as a second gear member.
[0031]
Here, the gear member 230 has a core rod 233 in which a center hole 231 into which the support shaft 281 is inserted is formed in an inner peripheral portion and a cam groove 232 is formed in an outer peripheral portion, and a projection 234. As shown in FIG. 4, the cam groove 232 includes a wall 232a, a wall 232b, a wall 232c, a wall 232d, a wall 232e, and a wall 232f substantially parallel to the directions indicated by the arrows 211a and 211b. It is formed of a wall portion 232g, a wall portion 232h, a wall portion 232i, a wall portion 232j, and a wall portion 232k that are substantially orthogonal to the directions indicated by the arrows 211a and 211b.
[0032]
As shown in FIGS. 2 and 3, the gear member 220 includes a core rod 222 in which a center hole 221 into which the core rod 233 of the gear member 230 is inserted is formed in an inner peripheral portion, and an inner peripheral portion of the core rod 222. And a projection 224 that engages with the core rod 233 through the cam groove 232 of the gear member 230.
[0033]
When the gear 210 is supported by the support shaft 281 and the movement in the directions indicated by the arrows 211a and 211b is regulated by the housing 280 and the fastening member 290, as shown in FIG. At position 223a.
[0034]
Here, since the width 230a of the cam groove 232 at the position 223a in the circumferential direction of the core rod 233 is larger than the diameter of the projection 223, the gear member 220 and the gear member 230 And is supported by a support shaft 281 so as to be relatively rotatable in a direction indicated by an arrow 203 (see FIG. 2).
[0035]
Further, the width 230b of the cam groove 232 at the position 223a in the axial direction of the core rod 233, that is, the direction indicated by the arrow 211a and the arrow 211b, is larger than the diameter of the projection 223. Is supported by a support shaft 281 so as to be relatively movable in the directions indicated by arrows 211a and 211b.
[0036]
As shown in FIGS. 2 and 3, the gear 210 includes a coil spring 240 provided between the gear member 220 and the gear member 230 and having the core rod 222 of the gear member 220 inserted inside.
[0037]
Here, the coil spring 240 has an arm 241 provided on one end side and engaged with the projection 224 of the gear member 220, and an arm 242 provided on the other end side and engaged with the projection 234 of the gear member 230. Of the directions in which the gear member 220 and the gear member 230 relatively rotate, the gear member 220 is urged against the gear member 230 in the direction indicated by the arrow 202, and the direction opposite to the direction indicated by the arrow 202 The gear member 230 is urged against the gear member 220 in the direction indicated by the arrow 203.
[0038]
Therefore, the gear device 200 eliminates backlash between the gear 210 and the counter gear 250 and the counter gear 260 as shown in FIG.
[0039]
Further, as shown in FIG. 3, the coil spring 240 has a length 240a shorter than the free length of the coil spring 240, and urges the gear member 220 in a direction indicated by an arrow 211b away from the gear member 230. The gear member 230 is urged in the direction indicated by an arrow 211 a away from the gear member 220 to be in close contact with the housing 280.
[0040]
Therefore, the gear device 200 eliminates the clearance between the gear 210 and the housing 280 and the fastening member 290.
[0041]
Next, the assembly of the gear device according to the present embodiment will be described.
[0042]
First, the coil spring 240 is mounted on the gear member 230 such that the core rod 233 of the gear member 230 is inserted inside the coil spring 240 and the arm 242 of the coil spring 240 is engaged with the projection 234 of the gear member 230. Is done.
[0043]
Next, the core rod 233 of the gear member 230 is inserted into the center hole 221 of the gear member 220, and the projection 223 of the gear member 220 is moved from the position 223b to the cam groove 232 of the gear member 230 as shown in FIG. It is moved to the position 223f via the position 223c, the position 223d and the position 223e.
[0044]
When the gear member 220 is moved so as to approach the gear member 230, the protrusion 223 of the gear member 220 is moved from the position 223b to the position 223c with respect to the cam groove 232 of the gear member 230. Since the engagement between the gear member 220 and the coil spring 240 starts, the gear member 220 and the gear member 230 are urged by the coil spring 240 in a direction away from each other.
[0045]
When the gear member 220 is rotated with respect to the gear member 230, the projection 223 of the gear member 220 engages with the wall 232 h of the gear member 230 and moves from the position 223 c with respect to the cam groove 232 of the gear member 230. When the gear member 220 and the gear member 230 are moved to the position 223d, the engagement between the projection 224 of the gear member 220 and the arm 241 of the coil spring 240 starts. Be energized.
[0046]
Further, by moving the gear member 220 so as to approach the gear member 230, the protrusion 223 of the gear member 220 engages with the wall portion 232 d of the gear member 230 and moves with respect to the cam groove 232 of the gear member 230. When the gear member 220 and the gear member 230 are moved from the position 223d to the position 223e by the coil spring 240, the projections 223 of the gear member 220 It moves from the position 223e to the position 223f by the urging force, and engages with the wall portion 232e of the gear member 230 and stops.
[0047]
Here, when the projection 223 is at the position 223f, the gear member 220 and the gear member 230 are urged in a direction to be separated from each other by the coil spring 240. Therefore, the wall portion of the gear member 230 is urged by the urging force of the coil spring 240. 232i. That is, the projection 223 of the gear member 220 and the wall portion 232i of the gear member 230 constitute a separation preventing unit that prevents the gear member 220 and the gear member 230 from being separated from each other by the coil spring 240 in a direction separating from each other. ing.
[0048]
When the projection 223 of the gear member 220 is moved to the position 223f with respect to the cam groove 232 of the gear member 230, the projection 223 of the gear member 220 is moved by the urging force of the coil spring 240 as described above. The gear member 220 and the gear member 230 are fixed to each other because they engage with the 232e and the wall portion 232i.
[0049]
When the gear 210 is assembled as described above, the mating gear 250 meshing with the gear 210 is rotatably supported by a support shaft (not shown) of the housing 280 as shown in FIG. The gear 210 is moved in a direction approaching the housing 280 such that the support shaft 281 is inserted into the housing 231 and the gear member 230 is engaged with the housing 280.
[0050]
When the gear 210 is moved to be close to the housing 280, the gear member 220 and the gear member 230 are relatively rotated to position the gear member 230 with respect to the cam groove 232 of the gear member 230 as shown in FIG. When the projection 223 of the gear member 220 is moved from 223f to the position 223e, the gear 210 and the mating gear 250 mesh with each other as shown in FIG.
[0051]
Then, after the gear 210 is engaged with the housing 280, when the gear member 220 is further moved closer to the housing 280, the position 223e with respect to the cam groove 232 of the gear member 230 as shown in FIG. The projection 223 of the gear member 220 is moved from to the position 223a.
[0052]
Finally, the fastening member 290 is fixed to the support shaft 281, and the mating gear 260 is rotatably supported by a support shaft (not shown) of the housing 280 so as to mesh with the gear 210, whereby the gear device 200 is assembled. .
[0053]
Next, operations of the gear device and the disk device according to the present embodiment will be described.
[0054]
When the traverse motor 150 rotates, power is transmitted to the rack 130 via the gear 160 and the gear device 200, and the optical pickup 120 moves together with the rack 130 while being guided by the guide shaft 140.
[0055]
Here, in the gear device 200, since the clearance between the gear 210, the housing 280, and the fastening member 290 can be removed by the coil spring 240, the noise and the impact may be reduced when external vibration is applied. Generation can be suppressed.
[0056]
Further, in the gear device 200, since the backlash between the gear 210 and the mating gear 250 and the mating gear 260 can be removed by the coil spring 240, generation of noise and impact when the gear 210 rotates is suppressed. can do.
[0057]
Therefore, the disk device 100 can improve the quietness and stability of operation as compared with the related art.
[0058]
Further, in the gear device 200, since the gear 210 has the protrusion 223 and the wall 232i for preventing the gear member 220 and the gear member 230 from being separated from each other by the coil spring 240 in the direction separating from each other, the gear 210 The entire assembly can be assembled after the assembly of the gear 210, and the assembling work can be facilitated as compared with the case where the gear 210 does not have the protrusion 223 and the wall portion 232i.
[0059]
In the present embodiment, the gear device 200 is used to transmit power for driving the optical pickup 120. However, according to the present invention, the power for transmitting the disk 800 to the spindle motor 110 is used. , Can be used for various power transmission.
[0060]
Further, in the present embodiment, the gear device 200 is configured to include the three gears of the gear 210, the counter gear 250, and the counter gear 260, but according to the present invention, one or more gears including the gear 210 are provided. Any configuration having gears may be used.
[0061]
In the present embodiment, the gear device 200 has a configuration in which the gear 210 is fixed to the housing 280 by the engagement of the fastening member 290 with the support shaft 281. The gear 210 may be provided with an elastic member that engages with the gear 281 and the gear 210 is fixed to the housing 280 by engaging the elastic member with the support shaft 281.
[0062]
(Second embodiment)
[0063]
First, the configurations of the gear device and the disk device according to the second embodiment will be described.
[0064]
Note that among the configurations of the disk device according to the present embodiment, the same configuration as the configuration of the disk device 100 according to the first embodiment (see FIG. 1) is different from the configuration of the disk device 100 according to the first embodiment. The same reference numerals as in the above configuration are used, and detailed description is omitted.
[0065]
The disk device according to the present embodiment includes the gear device according to the present embodiment in place of the gear device 200 (see FIG. 1) in the disk device 100 according to the first embodiment.
[0066]
As shown in FIGS. 6 and 7, the gear device according to the present embodiment includes a gear 210, a mating gear 350 that meshes with both the rack 130 (see FIG. 1) and the gear 210, and a mating gear 260 (see FIG. 1). ).
[0067]
Further, the gear device according to the present embodiment includes a housing 380 provided with a support shaft 381 as a support that rotatably supports gear 210, and a fastening member 390 fixed to support shaft 381. I have. Further, the housing 380 is provided with a support shaft 382 that rotatably supports the mating gear 350 and a support shaft (not shown) that rotatably supports the mating gear 260.
[0068]
In addition, the mating gear 350 has an engaging portion 351 that restricts the movement of the gear 210 in the direction indicated by the arrow 211a among the extending directions of the rotating shaft 211 by engaging with the gear 210.
[0069]
That is, the mating gear 350 and the housing 380 constitute a movement restricting unit that restricts the movement of the gear 210 in the direction indicated by the arrow 211a, and the housing 380 controls the movement of the mating gear 350 in the direction indicated by the arrow 211a. It constitutes a counterpart gear regulating unit that regulates movement. Further, the fastening member 390 forms a movement restricting portion that restricts the movement of the gear 210 in the direction indicated by the arrow 211b, which is the opposite direction to the direction indicated by the arrow 211a.
[0070]
Note that the coil spring 240 urges the gear member 220 in a direction indicated by an arrow 211b that is separated from the gear member 230, and is brought into close contact with the fastening member 390. Further, the coil spring 240 urges the gear member 230 in a direction indicated by an arrow 211 a away from the gear member 220 to make the gear member 230 come into close contact with the mating gear 350, so that the mating gear 350 further comes into close contact with the housing 380.
[0071]
Therefore, the gear device according to the present embodiment eliminates the clearance between gear 210 and mating gear 350 and fastening member 290, and the clearance between mating gear 350 and housing 380.
[0072]
Next, the assembly of the gear device according to the present embodiment will be described.
[0073]
When the gear 210 is assembled as described in the first embodiment, the mating gear 350 is rotatably supported by the support shaft 382 of the housing 380.
[0074]
Then, similarly to the assembly described in the first embodiment, after the gear 210 is rotatably supported by the support shaft 381 of the housing 380 so as to mesh with the mating gear 350, the fastening member 390 is attached to the support shaft 381. Fixed.
[0075]
Finally, the gear device according to the present embodiment is assembled by rotatably supporting mating gear 260 on a support shaft (not shown) of housing 380 so as to mesh with gear 210.
[0076]
As described above, in the gear device according to the present embodiment, the coil spring 240 allows the clearance between the gear 210 and the mating gear 350 and the fastening member 390 and the clearance between the mating gear 350 and the housing 380. Since the clearance can be removed, the generation of noise and impact when external vibration is applied can be suppressed.
[0077]
Therefore, the disk device 100 can improve the quietness and stability of operation as compared with the related art.
[0078]
The gear device according to the present embodiment has a configuration in which the gear 210 is fixed to the mating gear 350 by the engagement of the fastening member 390 with the support shaft 381. The gear 210 may be provided with an elastic member that engages with the gear 210 and the gear 210 is fixed to the mating gear 350 by engaging the elastic member with the support shaft 381.
[0079]
(Third embodiment)
[0080]
First, the configurations of the gear device and the disk device according to the third embodiment will be described.
[0081]
Note that among the configurations of the disk device according to the present embodiment, the same configuration as the configuration of the disk device 100 according to the first embodiment (see FIG. 1) is different from the configuration of the disk device 100 according to the first embodiment. The same reference numerals as in the above configuration are used, and detailed description is omitted.
[0082]
The disk device according to the present embodiment includes the gear device according to the present embodiment in place of the gear device 200 (see FIG. 1) in the disk device 100 according to the first embodiment.
[0083]
The gear device according to the present embodiment includes a gear 410, a mating gear 250 and a mating gear 260 (see FIG. 1), as shown in FIGS.
[0084]
Further, the gear device according to the present embodiment includes a housing 480 provided with a support shaft 481 as a support unit that rotatably supports the gear 410, and a fastening member 490 fixed to the support shaft 481. I have. The housing 480 is provided with a support shaft (not shown) that rotatably supports the counter gear 250 and the counter gear 260.
[0085]
Here, the housing 480 constitutes a movement restricting portion that restricts the movement of the gear 410 in the direction indicated by the arrow 411a among the extending directions of the rotation shaft 411 of the gear 410, and the fastening member 490 is formed by the arrow 411a. The movement restricting portion restricts the movement of the gear 410 in the direction indicated by the arrow 411b, which is the reverse direction of the direction indicated by the arrow.
[0086]
The gear 410 includes a gear member 420 as a first gear member, a gear member 430 as a second gear member, and a gear member 440 as a third gear member. Is a two-stage gear composed of two gears having different diameters.
[0087]
Here, the gear member 440 has a core rod 443 in which a center hole 441 into which the support shaft 481 is inserted is formed in an inner peripheral portion and a cam groove 442 is formed in an outer peripheral portion, and a projection 444.
[0088]
The gear member 430 includes a core rod 432 in which a center hole 431 into which the core rod 443 of the gear member 440 is inserted is formed in an inner peripheral portion, and a cam groove of the gear member 440 provided in an inner peripheral portion of the core rod 432. A projection 433 engaging with the core rod 443 at 442, a projection 434, a core rod 437 in which a center hole 435 into which the support shaft 481 is inserted is formed in an inner peripheral portion and a cam groove 436 is formed in an outer peripheral portion; 438.
[0089]
The gear member 420 includes a core rod 422 in which a center hole 421 into which the core rod 437 of the gear member 430 is inserted is formed in an inner peripheral portion, and a cam groove of the gear member 430 provided in an inner peripheral portion of the core rod 422. A protrusion 423 that engages with the core rod 437 at 436 and a protrusion 424 are provided.
[0090]
The shapes of the cam groove 436 and the cam groove 442 are the same as the shape of the cam groove 232 shown in FIG.
[0091]
Here, similarly to the gear member 220 and the gear member 230 according to the first embodiment, the gear member 420 and the gear member 430 form the rotating shaft 411 from the relationship between the width of the cam groove 436 and the diameter of the projection 423. The center is supported by the support shaft 481 so as to be relatively rotatable in the directions indicated by arrows 402 and 403, and is supported by the support shaft 481 so as to be relatively movable in the directions indicated by arrows 411a and 411b.
[0092]
Similarly, the gear member 430 and the gear member 440 support the support shaft so as to be relatively rotatable about the rotation shaft 411 in the directions indicated by arrows 402 and 403 from the relationship between the width of the cam groove 442 and the diameter of the protrusion 433. 481 and is supported by a support shaft 481 so as to be relatively movable in the directions indicated by arrows 411a and 411b.
[0093]
The gear 410 is provided between the gear member 420 and the gear member 430 and has a coil spring 450 in which the core rod 422 of the gear member 420 is inserted inside, and the gear 410 is provided between the gear member 430 and the gear member 440. And a coil spring 460 as an additional coil spring into which the core rod 432 of the member 430 is inserted.
[0094]
Here, the coil spring 450 has an arm 451 provided on one end side and engaged with the projection 424 of the gear member 420, and an arm 452 provided on the other end side and engaged with the projection 438 of the gear member 430. Of the directions in which the gear member 420 and the gear member 430 rotate relative to each other, the gear member 420 is urged against the gear member 430 in the direction indicated by the arrow 402, and the direction opposite to the direction indicated by the arrow 402 The gear member 430 is urged against the gear member 420 in the direction indicated by the arrow 403.
[0095]
The coil spring 460 has an arm 461 provided on one end side and engaged with the projection 434 of the gear member 430, and an arm 462 provided on the other end side and engaged with the projection 444 of the gear member 440. The gear member 430 and the gear member 440 urge the gear member 430 with respect to the gear member 440 in a direction indicated by an arrow 402 in a direction in which the gear member 440 relatively rotates. The gear member 440 is urged against the gear member 430 in a direction indicated by a certain arrow 403.
[0096]
Therefore, the gear device according to the present embodiment eliminates backlash between the gear 410 and the counter gear 250 and the counter gear 260 as shown in FIGS.
[0097]
As shown in FIG. 9, the coil spring 450 has a length 450a shorter than the free length of the coil spring 450, and urges the gear member 420 in a direction indicated by an arrow 411b away from the gear member 430. The gear member 430 is in close contact with the fastening member 490 and urges the gear member 430 in a direction indicated by an arrow 411 a away from the gear member 420.
[0098]
Further, the coil spring 460 has a length 460a shorter than the free length of the coil spring 460, and biases the gear member 430 in a direction indicated by an arrow 411b away from the gear member 440. It is urged in a direction indicated by an arrow 411 a away from the member 430 to be in close contact with the housing 480.
[0099]
Therefore, the gear device according to the present embodiment eliminates the clearance between gear 410 and housing 480 and fastening member 490.
[0100]
The projection 423 of the gear member 420 and a wall (not shown) of the gear member 430 having the cam groove 436 are separated from the gear member 420 and the gear member 430 urged by the coil spring 450 in a direction away from each other. This constitutes a first separation prevention unit for preventing the above.
[0101]
Further, the protrusion 433 of the gear member 430 and the wall (not shown) of the gear member 440 having the cam groove 442 are separated from the gear member 430 and the gear member 440 urged by the coil spring 460 in a direction away from each other. This constitutes a second separation prevention unit for preventing the above.
[0102]
Next, the assembly of the gear device according to the present embodiment will be described.
[0103]
When the gear 410 is assembled in the same manner as the assembly of the gear 210 described in the first embodiment, the mating gear 260 is rotatably supported on a support shaft (not shown) of the housing 480.
[0104]
Then, similarly to the assembly described in the first embodiment, after the gear 410 is rotatably supported by the support shaft 481 of the housing 480 so as to mesh with the mating gear 260, the fastening member 490 is attached to the support shaft 481. Fixed.
[0105]
Finally, the gear device according to the present embodiment is assembled by rotatably supporting the mating gear 250 on a support shaft (not shown) of the housing 480 so that the gear 410 and the mating gear 250 mesh with each other.
[0106]
As described above, in the gear device according to the present embodiment, the clearance between the gear 410, the housing 480, and the fastening member 490 can be removed by the coil springs 450 and 460. Generation of noise and impact when external vibration is applied can be suppressed.
[0107]
In the gear device according to the present embodiment, the backlash between the gear 410 and the counter gear 250 and the counter gear 260 can be removed by the coil spring 450 and the coil spring 460, so that the gear 410 rotates. Sometimes, generation of noise and impact can be suppressed.
[0108]
Therefore, the disk device 100 can improve the quietness and stability of operation as compared with the related art.
[0109]
Further, in the gear device according to the present embodiment, since the gear 410 has the projection 423 and the wall portion (not shown) of the gear member 430, and the projection 433 and the wall portion (not shown) of the gear member 440, the gear 410 has The entirety of the gear 410 can be assembled after the gear 410 has been assembled in advance, and the gear 410 has a projection 423 and a wall (not shown) of the gear member 430 and a projection 433 and a wall (not shown) of the gear member 440. Assembling work can be facilitated as compared with the case where the device does not have the component.
[0110]
The gear 410 is a two-stage gear composed of two gears having different diameters. However, according to the present invention, even if the diameters of the gear member 420, the gear member 430, and the gear member 440 are the same. good.
[0111]
Further, the gear device according to the present embodiment has a configuration in which the gear 410 is fixed to the housing 480 by the engagement of the fastening member 490 with the support shaft 481. The gear 410 may be provided with an elastic member that engages with the support shaft 481 so that the gear 410 is fixed to the housing 480.
[0112]
(Fourth embodiment)
[0113]
First, the configurations of the gear device and the disk device according to the fourth embodiment will be described.
[0114]
Note that among the configurations of the disk device according to the present embodiment, the same configurations as those of the disk device according to the third embodiment are denoted by the same reference numerals as those of the disk device according to the third embodiment. The detailed description is omitted.
[0115]
The disk device according to the present embodiment is the same as the disk device according to the third embodiment except that the gear device according to the present embodiment is provided in place of the gear device according to the third embodiment.
[0116]
As shown in FIGS. 12 and 13, the gear device according to the present embodiment includes a gear 410, a mating gear 550 that meshes with both the rack 130 (see FIG. 1) and the gear 410, and a gear 160 (see FIG. 1). And a mating gear 560 that meshes with both the gear 410 and the gear 410.
[0117]
Further, the gear device according to the present embodiment is configured such that support shaft 581 serving as a support portion rotatably supporting gear 410, support shaft 582 rotatably supporting mating gear 550, and rotatable mating gear 560 are provided. A housing 580 provided with a supporting shaft 583 for supporting is provided. Further, the gear device according to the present embodiment includes a fastening member 590 fixed to support shaft 582.
[0118]
In addition, the mating gear 560 has an engaging portion 561 that regulates the movement of the gear 410 in the direction indicated by the arrow 411 a in the extending direction of the rotating shaft 411 by engaging with the gear 410. Reference numeral 550 includes an engaging portion 551 that restricts the movement of the gear 410 in a direction indicated by an arrow 411b which is opposite to the direction indicated by the arrow 411a by engaging with the gear 410.
[0119]
That is, the mating gear 550 and the fastening member 590 constitute a movement restricting portion that regulates the movement of the gear 410 in the direction indicated by the arrow 411b, and the fastening member 590 sets the mating gear 550 in the direction indicated by the arrow 411b. It constitutes a counterpart gear regulating unit that regulates movement. Further, the counterpart gear 560 and the housing 580 constitute a movement restricting portion that restricts the movement of the gear 410 in the direction indicated by the arrow 411a, and the housing 580 controls the movement of the counterpart gear 560 in the direction indicated by the arrow 411a. It constitutes a counterpart gear regulating unit that regulates movement.
[0120]
The coil spring 450 and the coil spring 460 urge the gear member 420 in a direction indicated by an arrow 411b away from the gear member 430 and the gear member 440 so as to be in close contact with the mating gear 550, and further connect the mating gear 550 to a fastening member. 590. Further, the coil spring 460 and the coil spring 450 urge the gear member 440 in a direction indicated by an arrow 411a separated from the gear member 430 and the gear member 420 to be in close contact with the mating gear 560, and further mate the mating gear 560 to the housing. 580.
[0121]
Therefore, the gear device according to the present embodiment provides a clearance between gear 410 and counterpart gear 550 and counterpart gear 560, a clearance between counterpart gear 550 and fastening member 290, and a relation between counterpart gear 560 and housing 580. The clearance between has been eliminated.
[0122]
Next, the assembly of the gear device according to the present embodiment will be described.
[0123]
When the gear 410 is assembled as described in the third embodiment, the mating gear 560 is rotatably supported by the support shaft 583 of the housing 580.
[0124]
Then, similarly to the assembly described in the first embodiment, after the gear 410 is rotatably supported by the support shaft 581 of the housing 580 so as to mesh with the mating gear 560, the gear 410 and the mating gear 550 are connected. The mating gear 550 is rotatably supported by the support shaft 582 of the housing 580 so as to mesh with each other.
[0125]
Finally, by fixing the fastening member 590 to the support shaft 582, the gear device according to the present embodiment is assembled.
[0126]
As described above, the gear device according to the present embodiment uses the coil springs 450 and 460 to provide the clearance between the gear 410 and the mating gear 550 and the mating gear 560, and the mating gear 550 and the fastening member 290. And the clearance between the mating gear 560 and the housing 580 can be eliminated, so that the generation of noise and impact when external vibration is applied can be suppressed.
[0127]
Therefore, the disk device according to the present embodiment can improve quietness and stability of operation as compared with the related art.
[0128]
Note that the gear device according to the present embodiment has a configuration in which the mating gear 550 is fixed to the gear 410 by the engagement of the fastening member 590 with the support shaft 582. The mating gear 550 may be provided with an elastic member that engages with the gear 410, and the mating gear 550 is fixed to the gear 410 by engaging the elastic member with the support shaft 582.
[0129]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a gear device capable of suppressing generation of noise and impact when vibration is externally applied.
[Brief description of the drawings]
FIG. 1 is a top view of a disk drive according to a first embodiment of the present invention.
FIG. 2 is a top view of a part of the gear device shown in FIG. 1;
3 is a cross-sectional view of a part of the gear device as viewed from a direction indicated by an arrow A in FIG. 2;
FIG. 4 is a developed view of the outer peripheral surface of the core rod shown in FIG. 3;
FIG. 5 is a top view of a part of the gear and the mating gear shown in FIG. 2;
FIG. 6 is a top view of a part of a gear device according to a second embodiment of the present invention.
7 is a cross-sectional view of a part of the gear device as viewed from a direction indicated by an arrow B in FIG.
FIG. 8 is a top view of a part of a gear device according to a third embodiment of the present invention.
9 is a cross-sectional view of a part of the gear device viewed from a direction indicated by an arrow C in FIG.
FIG. 10 is a top view of a part of the gear and the mating gear shown in FIG. 8;
11 is a top view of a part of the gear shown in FIG. 8 and a mating gear different from the mating gear shown in FIG. 10;
FIG. 12 is a top view of a part of a gear device according to a fourth embodiment of the present invention.
13 is a cross-sectional view of a part of the gear device viewed from a direction indicated by an arrow D in FIG.
FIG. 14 is a top view of a conventional gear device.
FIG. 15 is a side sectional view of the gear device shown in FIG. 14;
[Explanation of symbols]
100 disk drive
200 gear device
210 gears
211 Rotation axis
220 Gear member (first gear member)
223 Projection (separation prevention part)
230 gear member (second gear member)
232i wall (separation prevention part)
240 coil spring
280 housing (movement restriction unit)
281 Support shaft (support part)
290 Fastening member (movement restricting part)
350 Mating gear (movement restricting part)
351 engaging part
380 case (movement restriction part, mating gear restriction part)
381 Support shaft (support part)
390 Fastening member (movement restricting part)
410 gears
411 Rotation axis
420 gear member (first gear member)
423 protrusion (first separation prevention part)
430 gear member (second gear member)
433 protrusion (second separation prevention part)
440 Gear member (third gear member)
450 coil spring
460 coil spring (additional coil spring)
480 case (movement restriction unit)
481 Support shaft (support part)
490 Fastening member (movement restricting part)
550 Mating gear (movement restricting part)
551 engaging part
560 Mating gear (movement restricting part)
561 engaging part
580 housing (movement control unit, counter gear control unit)
581 Support shaft (support part)
590 Fastening member (movement restriction part, mating gear restriction part)

Claims (6)

歯車と、前記歯車を回転可能に支持する支持部と、前記歯車の回転軸の延在方向への前記歯車の移動を規制する移動規制部とを備え、
前記歯車は、前記回転軸を中心に相対的に回転可能に前記支持部に支持された第一の歯車部材及び第二の歯車部材と、前記第一の歯車部材及び前記第二の歯車部材が相対的に回転する方向に前記第一の歯車部材及び前記第二の歯車部材を付勢したコイルばねとを有し、
前記第一の歯車部材及び前記第二の歯車部材は、前記回転軸の延在方向に相対的に移動可能に前記支持部に支持されて互いに離隔する方向に前記コイルばねに付勢されたことを特徴とする歯車装置。
A gear, a support portion that rotatably supports the gear, and a movement restricting portion that regulates movement of the gear in a direction in which a rotation axis of the gear extends.
The gear includes a first gear member and a second gear member supported by the support portion so as to be relatively rotatable about the rotation axis, and the first gear member and the second gear member. A coil spring that biases the first gear member and the second gear member in a direction of relative rotation,
The first gear member and the second gear member are supported by the support portion so as to be relatively movable in the extending direction of the rotation shaft, and are urged by the coil spring in a direction away from each other. A gear device characterized by the above-mentioned.
前記歯車は、互いに離隔する方向に前記コイルばねに付勢された前記第一の歯車部材及び前記第二の歯車部材の離隔を防止する離隔防止部を有したことを特徴とする請求項1に記載の歯車装置。2. The gear according to claim 1, wherein the gear has a separation prevention unit configured to prevent separation of the first gear member and the second gear member urged by the coil spring in a direction separating from each other. 3. A gear device as described. 前記歯車は、前記回転軸を中心に前記第二の歯車部材に対して回転可能に前記支持部に支持された第三の歯車部材と、前記第二の歯車部材及び前記第三の歯車部材が相対的に回転する方向に前記第二の歯車部材及び前記第三の歯車部材を付勢した追加のコイルばねとを有し、
前記第二の歯車部材及び前記第三の歯車部材は、前記回転軸の延在方向に相対的に移動可能に前記支持部に支持されて互いに離隔する方向に前記追加のコイルばねに付勢されたことを特徴とする請求項1に記載の歯車装置。
The gear includes a third gear member rotatably supported by the support portion with respect to the second gear member around the rotation axis, and the second gear member and the third gear member. An additional coil spring that biases the second gear member and the third gear member in a direction of relative rotation,
The second gear member and the third gear member are supported by the support portion so as to be relatively movable in an extending direction of the rotation shaft, and are urged by the additional coil spring in a direction away from each other. The gear device according to claim 1, wherein:
前記歯車は、互いに離隔する方向に前記コイルばねに付勢された前記第一の歯車部材及び前記第二の歯車部材の離隔を防止する第一の離隔防止部と、互いに離隔する方向に前記追加のコイルばねに付勢された前記第二の歯車部材及び前記第三の歯車部材の離隔を防止する第二の離隔防止部とを有したことを特徴とする請求項3に記載の歯車装置。The gear includes a first separation prevention unit that prevents separation of the first gear member and the second gear member urged by the coil spring in a direction separating from each other, and the additional separation unit in a direction separating from each other. The gear device according to claim 3, further comprising a second separation prevention unit configured to prevent separation between the second gear member and the third gear member biased by the coil spring. 前記移動規制部は、前記歯車と噛み合う相手歯車と、前記回転軸の延在方向への前記相手歯車の移動を規制する相手歯車規制部とを有し、
前記相手歯車は、前記歯車に係合することによって前記回転軸の延在方向への前記歯車の移動を規制する係合部を有したことを特徴とする請求項1から請求項4までの何れかに記載の歯車装置。
The movement restricting portion has a mating gear that meshes with the gear, and a mating gear restricting portion that restricts movement of the mating gear in the direction in which the rotation shaft extends,
5. The mating gear according to claim 1, wherein the mating gear has an engaging portion that restricts movement of the gear in the direction in which the rotation shaft extends by engaging with the gear. 6. A gear device according to any one of claims 1 to 3.
請求項1から請求項5までの何れかに記載の歯車装置を備えたことを特徴とするディスク装置。A disk device comprising the gear device according to any one of claims 1 to 5.
JP2002324247A 2002-11-07 2002-11-07 Gear device and disk device Pending JP2004156740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002324247A JP2004156740A (en) 2002-11-07 2002-11-07 Gear device and disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002324247A JP2004156740A (en) 2002-11-07 2002-11-07 Gear device and disk device

Publications (1)

Publication Number Publication Date
JP2004156740A true JP2004156740A (en) 2004-06-03

Family

ID=32803892

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2004156740A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102678883A (en) * 2011-03-09 2012-09-19 Skf公司 Wear-compensation device for gear

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102678883A (en) * 2011-03-09 2012-09-19 Skf公司 Wear-compensation device for gear
CN102678883B (en) * 2011-03-09 2016-08-31 Skf公司 The device of wear compensation of gear

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