JPH01276473A - Head driving device for floppy disk drive - Google Patents
Head driving device for floppy disk driveInfo
- Publication number
- JPH01276473A JPH01276473A JP10519988A JP10519988A JPH01276473A JP H01276473 A JPH01276473 A JP H01276473A JP 10519988 A JP10519988 A JP 10519988A JP 10519988 A JP10519988 A JP 10519988A JP H01276473 A JPH01276473 A JP H01276473A
- Authority
- JP
- Japan
- Prior art keywords
- pinion shaft
- head
- carriage
- head carriage
- rack
- 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
Links
- 230000036316 preload Effects 0.000 claims abstract description 18
- 230000033001 locomotion Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000035515 penetration Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 2
- 238000005096 rolling process Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003872 anastomosis Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Moving Of Heads (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はフロッピーディスクドライブ用ヘッド駆Ｓ装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a head drive S device for a floppy disk drive.
（従来の技＆）
従来例のラックとピニオンとを採用したフロッピーディ
スクドライブ用ヘッド駆動装置について第５図を参照し
て説明する。フロッピーディスクドライブ用へラドキャ
リッジ１にラック板３及び予圧用マグネッ）１２を設け
、モータ取付は用鉄板１１と前記予圧用マグネット１２
との磁気吸引により、ラック板３のラックとモータ１０
のピニオン軸９の歯部９ａとの噛み合いに予圧を与える
ことにより作動中のバックラッシュを防止し、又モータ
１０の出力すなわち、ピニオン軸９の回転を直進運動変
換してヘッドキャリッジｌをガイド棒２にそって、所定
方向へ移動する装置が一般的に用いられている。(Conventional Techniques &) A head drive device for a floppy disk drive employing a conventional rack and pinion will be described with reference to FIG. A rack plate 3 and a preloading magnet 12 are provided on the floppy disk drive carriage 1, and a steel plate 11 and the preloading magnet 12 are used for mounting the motor.
Due to the magnetic attraction between the rack plate 3 and the motor 10,
By applying preload to the engagement with the teeth 9a of the pinion shaft 9, backlash during operation is prevented, and the output of the motor 10, that is, the rotation of the pinion shaft 9, is converted into linear motion to move the head carriage l into the guide rod. 2, a device that moves in a predetermined direction is generally used.
（発明が解決しようとする課題）
前記、従来のヘッド駆動装置では、ラック板３に設けた
ラックとピニオン軸９の歯部９ａが使用により摩耗する
と、前記ラックとピニオン軸９の歯部９ａの噛み合い深
さが摩耗量Ｘｉ／ｓｉｎθ倍（θ＝圧力角）変化する事
になり、ヘッドキャリッジｌの高さ位置ズレを生じて、
そのためフロッピーディスクのペネトレーション（移動
侵入）に不具合が発生するという問題点があった。(Problems to be Solved by the Invention) In the conventional head drive device described above, when the rack provided on the rack plate 3 and the teeth 9a of the pinion shaft 9 wear out due to use, the teeth 9a of the rack and pinion shaft 9 wear out. The depth of engagement changes by the amount of wear Xi/sin θ (θ = pressure angle), causing a height positional deviation of the head carriage l.
Therefore, there was a problem in that a problem occurred in the penetration (moving invasion) of the floppy disk.
（課題を解決するための手段）
本発明は前述の問題点を除去することを目的とするもの
である。この目的を達成するための手段について、本発
明に係る一実施例を図示する第１図を参照して説明する
。(Means for Solving the Problems) The present invention aims to eliminate the above-mentioned problems. Means for achieving this object will be explained with reference to FIG. 1, which illustrates one embodiment of the present invention.
フロッピーディスクドライブ用ヘッドの直進運動変換機
構において、モータ１０の出力軸に歯部を設けたピニオ
ン軸９の外周にヘッドキャリッジ７の滑走部である油部
７ａ上を回転自在に滑走する支持ローラ８を嵌挿し、前
記ピニオン軸９の歯部９ａに噛合するラック歯部ｔを具
えたラック板Ｒをヘッドキャリッジ７に装着し、更に前
記ラック板Ｒとピニオン軸９との噛合状態において、両
部材に対し予圧を与える予圧用板ばね４を前記へラドキ
ャリッジに装着してなるフロッピーディスクドライブ用
ヘッド駆動装置を提供する。In a linear motion conversion mechanism for a floppy disk drive head, a support roller 8 rotatably slides on an oil portion 7a, which is a sliding portion of a head carriage 7, on the outer periphery of a pinion shaft 9, which has teeth on the output shaft of a motor 10. A rack plate R having rack teeth t that engages with the teeth 9a of the pinion shaft 9 is mounted on the head carriage 7, and when the rack plate R and the pinion shaft 9 are in mesh with each other, both members To provide a head drive device for a floppy disk drive, in which a preload plate spring 4 for applying a preload to the head carriage is mounted on the helad carriage.
（作 用）
本発明によれば、ヘッドキャリッジ７の高さは、ピニオ
ン軸９に設けた支持ローラ８とローラ滑走面であるヘッ
ドキャリッジ７の滑走部である袖部７ａとによって決定
され、ラック板Ｈに連結された予圧用板ばね４によって
、ラック板Ｒを上下位置調整自在となしてラック板Ｈの
ラック歯部ｔとピニオン軸９の歯部９ａに予圧を与えて
おり、前記状態に於いてモータ１０のピニオン軸９を回
転するとこのピニオン軸９の歯部９ａとラック歯部ｔを
介して噛み合っているラック板Ｒは直進運動をなして、
ヘッドキャリッジ７を所定方向へ、バックラッシュを生
じることなく円滑に移動する。ラック板Ｒのラック歯部
ｔとピニオン軸９の歯部９ａとの吻合に起因して両部材
に摩耗が生じ、その結果両部材の噛合部の高さに変化が
起こっても、ピニオン軸９に装着した支持ローラ８が依
然としてヘッドキャリッジ７の油部７ａ上をピニオン軸
９を支持しつつ回動するから、前記両部材噛合部の嵩さ
の変化の影響をうけることはない。従ってヘッドキャリ
ッジ７は高さに変化なく円滑な移動を実施する。(Function) According to the present invention, the height of the head carriage 7 is determined by the support roller 8 provided on the pinion shaft 9 and the sleeve portion 7a which is a sliding portion of the head carriage 7 which is a roller sliding surface, and A preload leaf spring 4 connected to the plate H allows the vertical position of the rack plate R to be freely adjusted and applies preload to the rack teeth t of the rack plate H and the teeth 9a of the pinion shaft 9. When the pinion shaft 9 of the motor 10 is rotated, the rack plate R meshing with the teeth 9a of the pinion shaft 9 through the rack teeth t moves in a straight line.
To smoothly move a head carriage 7 in a predetermined direction without causing backlash. Even if wear occurs in both members due to the anastomosis between the rack tooth portion t of the rack plate R and the tooth portion 9a of the pinion shaft 9, and as a result, the height of the meshing portion of both members changes, the pinion shaft 9 Since the support roller 8 attached to the head carriage 7 still rotates on the oil portion 7a of the head carriage 7 while supporting the pinion shaft 9, it is not affected by the change in the volume of the engaging portion of the two members. Therefore, the head carriage 7 moves smoothly without any change in height.
（実施例）
以下本発明の第１の実施例を添付図面第１図、第２図を
参照して説明する。(Embodiment) A first embodiment of the present invention will be described below with reference to the accompanying drawings FIGS. 1 and 2.
ヘッドキャリッジ７は段部を形成する滑走部としての袖
部７ａを具え、袖部７ａの両側端にラック板Ｈの脚部ｆ
が嵌合可能な溝りを穿設する。The head carriage 7 includes a sleeve portion 7a as a sliding portion forming a stepped portion, and leg portions f of a rack plate H are provided at both ends of the sleeve portion 7a.
Drill a groove that can be fitted.
ラック板Ｒはほぼコ字状を形成し、その−内側面にモー
タ１０のピニオン軸９の歯部９ａに噛合するラック歯部
ｔを設ける。The rack plate R has a substantially U-shape, and is provided with rack teeth t on its inner side surface to mesh with the teeth 9a of the pinion shaft 9 of the motor 10.
ヘッドキャリッジ７の袖部７ａの下に弾性部材よりなる
予圧用板ばね４を取りつけるが、この際′ラック板Ｒの
脚部ｆを先ず袖部７ａの孔りに嵌挿し、脚部ｆの先端部
を予圧用板ばね４に穿設した角孔５に挿入して後、予圧
用板ばねをその中央孔６により袖部７ａの下に螺着する
。The preload plate spring 4 made of an elastic member is attached to the bottom of the sleeve 7a of the head carriage 7. At this time, the leg f of the rack plate R is first inserted into the hole in the sleeve 7a, and then the tip of the leg f is inserted. After inserting the section into the square hole 5 formed in the preload leaf spring 4, the preload leaf spring is screwed under the sleeve part 7a through its center hole 6.
モータ１０のピニオン軸９はベアリングｌＯａによりモ
ータ１０に回転自在に支承され、その端部歯部９ａはラ
ック板Ｈのラック歯部ｔと噛合すると共に、ベアリング
１０ａとラック板Ｒとの中間位置で前記ピニオン軸９に
支持ローラ８を取りつける。このローラ８はモータ１ｏ
により回転するピニオン軸９に外嵌し、ピニオン軸９の
回転に応じてヘッドキャリッジ７の油部７ａ上を滑走す
る。The pinion shaft 9 of the motor 10 is rotatably supported by the motor 10 by a bearing lOa, and its end teeth 9a mesh with the rack teeth t of the rack plate H, and at an intermediate position between the bearing 10a and the rack plate R. A support roller 8 is attached to the pinion shaft 9. This roller 8 is motor 1o
The pinion shaft 9 is fitted onto the rotating pinion shaft 9, and slides on the oil portion 7a of the head carriage 7 in accordance with the rotation of the pinion shaft 9.
尚本発明の滑走部は本実施例のように段部袖部でなくし
て、支持ローラ８が滑走可能な構成であれば、例えば後
述するようにヘッドキャリッジ７の延長部の上面又はへ
ラドキャリッジ７にラック板Ｒとほぼ平行に穿設した長
溝ｇでもよい、（第３図、第４図参照）
以上の構成において、モータ１０を回転してピニオン軸
９を作動するとピニオン軸９の端部に設けた歯部９ａは
ラック板Ｈのラック歯部ｔに噛合しつつラック板Ｒと共
にヘッドキャリッジ７をガイド棒２に沿って変位せしめ
２ヘツドキヤリツジ７を所定位置まで移動する。Note that the sliding part of the present invention is not a stepped part sleeve part as in this embodiment, but if the supporting roller 8 is configured to be able to slide, for example, the upper surface of the extension part of the head carriage 7 or the helad carriage as described later. (See Figures 3 and 4.) In the above configuration, when the motor 10 is rotated and the pinion shaft 9 is actuated, the end of the pinion shaft 9 The teeth 9a provided on the rack plate H displace the head carriage 7 along the guide rod 2 together with the rack plate R while meshing with the rack teeth t of the rack plate H, thereby moving the two-head carriage 7 to a predetermined position.
前記移動に当って支持ローラ８はへラドキャリッジ７の
袖部７ａ上を滑走する。前記予圧用板ばね４により、ラ
ック板Ｒのラック歯部ｔとピニオン軸９の歯部９ａの噛
合時には予圧作用が働くから、両部材の作動中のバック
ラッシュを防止できる。During the movement, the support roller 8 slides on the sleeve portion 7a of the helad carriage 7. The preloading leaf spring 4 exerts a preloading effect when the rack teeth t of the rack plate R and the teeth 9a of the pinion shaft 9 engage, so that backlash can be prevented during operation of both members.
又、ヘッドキャリッジ７の作動中に、ラー、り板Ｒのラ
ック歯部ｔとピニオン軸９の歯部９ａとの摩擦に起因す
る摩耗により両部材の歯部の噛合状態、特に両部材の間
隔に変化がおきても、ピニオン軸９に外嵌した支持ロー
ラ８がへラドキャリッジの袖部７ａ面を滑走するのでヘ
ッドキャリッジ７の高さは支持ローラ８と袖部７ａとの
間隔により規制される構成であるから、ラック板Ｒどピ
ニオン軸９との間隔、特にラック南部上と歯部９ａとの
噛合状態での間隔は一定に保たれる。従って摩耗による
両部材間の間隔変化の悪影響は阻止される。In addition, during the operation of the head carriage 7, wear due to friction between the rack teeth t of the rack plate R and the teeth 9a of the pinion shaft 9 may cause damage to the meshing state of the teeth of both members, especially the spacing between the two members. Even if there is a change in the head carriage 7, the height of the head carriage 7 is regulated by the distance between the support roller 8 and the sleeve 7a because the support roller 8 fitted onto the pinion shaft 9 slides on the surface of the sleeve 7a of the head carriage. Because of this structure, the distance between the rack plate R and the pinion shaft 9, especially the distance between the upper part of the lower part of the rack and the teeth 9a in the engaged state, is kept constant. The negative effects of changes in the distance between the two parts due to wear are thus prevented.
第３図は本発明に係る第２の実施例を示す。本実施例に
おいては、第１実施例のように滑走部としてヘッドキャ
リッジ７の袖部７ａを設けずして、ヘッドキャリッジ７
は同一平面をなし、支持ローラ８はこの平面上を滑走す
る。FIG. 3 shows a second embodiment of the invention. In this embodiment, unlike the first embodiment, the sleeve portion 7a of the head carriage 7 is not provided as a sliding portion, and the head carriage 7
form the same plane, and the support roller 8 slides on this plane.
第４図は本発明に係る第３の実施例を示す。本実施例に
おいては、ヘッドキャリッジ７に支持ローラ８が嵌合転
動可能な幅を有する長溝ｇを穿設する。支持ローラ８は
滑走部である前記長溝ｇ内を滑走可能である。FIG. 4 shows a third embodiment of the present invention. In this embodiment, the head carriage 7 is provided with a long groove g having a width that allows the support roller 8 to fit and roll therein. The support roller 8 can slide within the long groove g, which is a sliding portion.
（発明の効果）
以上説明したように１本発明によれば、ピニオン軸に取
りつけた支持ローラがへラドキャリッジの高さを一定に
支持しつつヘッドキャリー２ジの袖部上面、ヘッドキャ
リッジ上面又はヘッドキャリッジに穿設した滑走路であ
る溝内を滑走することにより２又予圧用板ばね構成によ
ってラック板とピニオン軸との間隔の変化を調整可能な
構造になっているので、ヘッドキャリッジの高さ方向の
変化を少なくし、その所定方向への変位を円滑に実施す
るので、ペネトレーションの不具合を防止できる。又ラ
ックとピニオン軸の噛合時における予圧変動も少なくな
る為、損失トルク変動を低下させる効果が期待できる。(Effects of the Invention) As explained above, according to the present invention, the support roller attached to the pinion shaft supports the height of the helad carriage at a constant level, and the upper surface of the sleeve of the head carrier 2, the upper surface of the head carriage, The height of the head carriage can be adjusted by sliding in a groove, which is a runway drilled in the head carriage, to adjust the distance between the rack plate and the pinion shaft using a two-pronged preload leaf spring structure. Since the change in the horizontal direction is reduced and the displacement in the predetermined direction is smoothly carried out, problems with penetration can be prevented. Furthermore, preload fluctuations when the rack and pinion shaft engage are also reduced, which can be expected to reduce torque loss fluctuations.
第１図は本発明に係るヘッド駆動装置の第１の実施例の
斜視図。
第２図は第１図の断面図。
第３図は本発明に係るヘッド駆動装置の第２の実施例を
示す斜視図。
第４図は第３の実施例を示す斜視図。
第５図は従来例のヘッド駆動装置の断面図。
２・・・ヘッドガイド林、４・・・予圧用板ばね、５・
・・予圧用板ばねの孔、７・・・ヘッドキャリッジ、７
ａ・・・ヘッドキャリー、ジ袖部、８・・・支持ローラ
、９・・・ピニオン軸、９ａ・・・歯部、１ｏ・・・モ
ータ、ｇ・・・長溝、ｈ・・・袖部の溝、Ｒ・・・ラッ
ク板、し・・・ラック歯部。FIG. 1 is a perspective view of a first embodiment of a head driving device according to the present invention. FIG. 2 is a sectional view of FIG. 1. FIG. 3 is a perspective view showing a second embodiment of the head driving device according to the present invention. FIG. 4 is a perspective view showing the third embodiment. FIG. 5 is a sectional view of a conventional head driving device. 2... Head guide Hayashi, 4... Preload leaf spring, 5...
...Preload leaf spring hole, 7...Head carriage, 7
a... Head carry, sleeve part, 8... Support roller, 9... Pinion shaft, 9a... Teeth, 1o... Motor, g... Long groove, h... Sleeve part groove, R... rack plate, and... rack teeth.
Claims (1)
換機構において、モータのピニオン軸の外周に嵌合して
ヘッドキャリッジの滑走部を回動自在に滑走する支持ロ
ーラと、前記ピニオン軸に噛合するラックを具えたラッ
ク板と、更に前記ラック板とピニオン軸とに対して予圧
を与えるように前記ヘッドキャリッジに設けた予圧用弾
性部材とを有することを特徴とするフロッピーディスク
ドライブ用 ヘッド駆動装置。 ２、コ字状ラック板の脚部が嵌合する孔部をヘッドキャ
リッジに穿設し、ヘッドキャリッジの下面に予圧用板ば
ねを装着し、前記ラック板とピニオン軸に予圧を与える
ようにしてなる請求項１記載のフロッピーディスクドラ
イブ用ヘッド駆動装置。 ３、支持ローラの滑走部としてヘッドキャリッジに段部
を有する袖部を設け、前記袖部下面に予圧用板ばねを設
けた請求項１又は２記載のフロッピーディスクドライブ
用ヘッド駆動装置。 ４、ヘッドキャリッジに支持ローラが滑走可能な長溝部
を設けた請求項１又は２記載のフ ロッピーディスクドライブ用ヘッド駆動装 置。[Scope of Claims] 1. A linear motion conversion mechanism for a head for a floppy disk drive, which comprises: a support roller that fits around the outer periphery of a pinion shaft of a motor and rotatably slides on a sliding portion of a head carriage; and the pinion shaft. A head for a floppy disk drive, comprising: a rack plate having a rack that meshes with the rack; and a preload elastic member provided on the head carriage to apply preload to the rack plate and the pinion shaft. Drive device. 2. A hole into which the leg of the U-shaped rack plate fits is bored in the head carriage, and a preload leaf spring is installed on the underside of the head carriage to apply preload to the rack plate and pinion shaft. A head drive device for a floppy disk drive according to claim 1. 3. A head drive device for a floppy disk drive according to claim 1 or 2, wherein the head carriage is provided with a sleeve portion having a stepped portion as a sliding portion of the support roller, and a preload leaf spring is provided on the lower surface of the sleeve. 4. The head drive device for a floppy disk drive according to claim 1 or 2, wherein the head carriage is provided with a long groove portion on which the support roller can slide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10519988A JPH01276473A (en) | 1988-04-27 | 1988-04-27 | Head driving device for floppy disk drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10519988A JPH01276473A (en) | 1988-04-27 | 1988-04-27 | Head driving device for floppy disk drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01276473A true JPH01276473A (en) | 1989-11-07 |
Family
ID=14400997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10519988A Pending JPH01276473A (en) | 1988-04-27 | 1988-04-27 | Head driving device for floppy disk drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01276473A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5303104A (en) * | 1991-06-10 | 1994-04-12 | Seiko Epson Corporation | Disk drive apparatus having carriage driving mechanism |
-
1988
- 1988-04-27 JP JP10519988A patent/JPH01276473A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5303104A (en) * | 1991-06-10 | 1994-04-12 | Seiko Epson Corporation | Disk drive apparatus having carriage driving mechanism |
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