JPS61153487U - - Google Patents
Info
- Publication number
- JPS61153487U JPS61153487U JP3521085U JP3521085U JPS61153487U JP S61153487 U JPS61153487 U JP S61153487U JP 3521085 U JP3521085 U JP 3521085U JP 3521085 U JP3521085 U JP 3521085U JP S61153487 U JPS61153487 U JP S61153487U
- Authority
- JP
- Japan
- Prior art keywords
- main magnet
- magnet
- circuit board
- printed circuit
- yoke
- 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
- 238000001514 detection method Methods 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000000696 magnetic material Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 229910052761 rare earth metal Inorganic materials 0.000 claims 1
- 150000002910 rare earth metals Chemical class 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Brushless Motors (AREA)
Description
図面は何れも本考案の１実施例に係り、第１図
はスピンドルに磁気デイスクを装着した状態の断
側面図、第２図はプリント基板のコイル形成面を
示す裏面図、第３図はヨーク板の平面図、第４図
ａは取付けケースの平面図、第４図ｂは同図ａの
Ａ―Ａ線断面図である。
１……シヤーシ、４……スピンドル、６……吸
着用マグネツト、７……磁気デイスク、８……セ
ンターハブ、９……吸着板、１０……ＰＧヨーク
、１１……ＰＧヨークセンサ、１２……ロータ円
板、１４……主マグネツト、１５……ＦＧマグネ
ツト、１６……プリント基板、１７……コイル、
１９……検出素子、２０……ヨーク板、２１……
取付けケース、２２……ＦＧコイル板、２３……
ＦＧコイル。
The drawings all relate to one embodiment of the present invention; Fig. 1 is a cross-sectional side view of a state in which a magnetic disk is attached to a spindle, Fig. 2 is a rear view showing the coil forming surface of a printed circuit board, and Fig. 3 is a yoke. FIG. 4a is a plan view of the plate, FIG. 4b is a sectional view taken along line A--A in FIG. 4a. 1... Chassis, 4... Spindle, 6... Adsorption magnet, 7... Magnetic disk, 8... Center hub, 9... Adsorption plate, 10... PG yoke, 11... PG yoke sensor, 12... ...Rotor disc, 14...Main magnet, 15...FG magnet, 16...Printed circuit board, 17...Coil,
19...detection element, 20...yoke plate, 21...
Installation case, 22...FG coil plate, 23...
FG coil.
補正 昭６０．６．７
実用新案登録請求の範囲を次のように補正する
。Amendment June 7, 1980 The scope of claims for utility model registration is amended as follows.
【実用新案登録請求の範囲】
その面垂直方向（スラスト方向）に多極着磁さ
れた 円板状の主マグネツトと、該主マグネツトを
固着し磁気デイスクを回動させるためのスピンド
ルと、 前記磁気デイスクのセンターハブを吸着す
るために前記スピンドルの上部に設けた吸着用マ
グネツトと、前記主マグネツトと吸着用マグネツ
トとの間に位置し前記スピンドルを軸支した機構
用鋼板よりなるシヤーシ部材と、該シヤーシ部材
と前記主マグネツトとの間に位置したプリント基
板と、前記主マグネツトと所定間隔をもつて対向
する前記プリント基板上のコイルと、前記主マグ
ネツトの回転位置を検出するために前記プリント
基板のコイル形成面と反対面に設けられた検出素
子と、前記主マグネツトを覆うに足る面積をもつ
電磁軟鉄等の軟磁性体よりなるヨーク板とを備え
、前記プリント基板を前記ヨーク板を介して前記
シヤーシ部材の裏面に密着・固定し、シヤーシ部
材とプリント基板との間に形成されるヨーク板の
厚さ分の空隙内に前記検出素子を収納すると共に
、検出素子を前記主マグネツトの外周縁からの磁
束を検出する位置に位置付けたことを特徴とする
磁束デイスク駆動用小型モータ。[ Claims for Utility Model Registration] A disc -shaped main magnet magnetized with multiple poles in a direction perpendicular to its surface (thrust direction), a spindle for fixing the main magnet and rotating a magnetic disk , an attraction magnet provided above the spindle to attract the center hub of the magnetic disk; a chassis member made of a mechanical steel plate located between the main magnet and the attraction magnet and pivotally supporting the spindle; a printed circuit board located between the chassis member and the main magnet; a coil on the printed circuit board facing the main magnet at a predetermined distance; a detection element provided on a surface opposite to the coil forming surface, and a yoke plate made of a soft magnetic material such as electromagnetic soft iron having an area sufficient to cover the main magnet, and the printed circuit board is inserted through the yoke plate. The detection element is closely attached and fixed to the back surface of the chassis member, and the detection element is housed in a gap equal to the thickness of the yoke plate formed between the chassis member and the printed circuit board, and the detection element is attached to the outer peripheral edge of the main magnet. A small motor for driving a magnetic flux disk, characterized in that it is positioned at a position to detect magnetic flux from.
Claims (1)
れた希土類マグネツトよりなる高磁気エネルギー
積の円板状の主マグネツトと、該主マグネツトを
固着し磁気デイスクを回動させるためのスピンド
ルと、ＰＧヨーク付きの前記磁気デイスクのセン
ターハブを吸着するために前記スピンドルの上部
に設けた吸着用マグネツトと、前記主マグネツト
と吸着用マグネツトとの間に位置し前記スピンド
ルを軸支した機構用鋼板よりなるシヤーシ部材と
、該シヤーシ部材と前記主マグネツトとの間に位
置したプリント基板と、前記主マグネツトと所定
間隔をもつて対向する前記プリント基板上のコイ
ルと、前記主マグネツトの回転位置を検出するた
めに前記プリント基板のコイル形成面と反対面に
設けられた検出素子と、前記主マグネツトを覆う
に足る面積をもつ電磁軟鉄等の軟磁性体よりなる
ヨーク板とを備え、前記プリント基板を前記ヨー
ク板を介して前記シヤーシ部材の裏面に密着・固
定し、シヤーシ部材とプリント基板との間に形成
されるヨーク板の厚さの分の空隙内に前記検出素
子を収納すると共に、検出素子を前記主マグネツ
トの外周縁からの磁束を検出する位置に位置付け
たことを特徴とする磁気デイスク駆動用小型モー
タ。 A disk-shaped main magnet with a high magnetic energy product made of a rare earth magnet magnetized with multiple poles in the direction perpendicular to the surface (thrust direction), a spindle for fixing the main magnet and rotating the magnetic disk, and a PG magnet. It consists of an attraction magnet provided above the spindle for attracting the center hub of the magnetic disk with a yoke, and a mechanical steel plate located between the main magnet and the attraction magnet and pivotally supporting the spindle. A chassis member, a printed circuit board located between the chassis member and the main magnet, a coil on the printed circuit board facing the main magnet at a predetermined distance, and a rotational position of the main magnet. a detection element provided on a surface opposite to the coil forming surface of the printed circuit board, and a yoke plate made of a soft magnetic material such as electromagnetic soft iron having an area sufficient to cover the main magnet, and the printed circuit board is mounted on the yoke. The detection element is closely attached and fixed to the back surface of the chassis member via a plate, and the detection element is accommodated in a gap equal to the thickness of the yoke plate formed between the chassis member and the printed circuit board. A small motor for driving a magnetic disk, characterized in that it is positioned at a position to detect magnetic flux from the outer periphery of a main magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3521085U JPS61153487U (en) | 1985-03-12 | 1985-03-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3521085U JPS61153487U (en) | 1985-03-12 | 1985-03-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61153487U true JPS61153487U (en) | 1986-09-22 |
Family
ID=30539281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3521085U Pending JPS61153487U (en) | 1985-03-12 | 1985-03-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61153487U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930683B2 (en) * | 1979-12-11 | 1984-07-28 | リユ−カサイト・リサ−チ・インコ−ポレ−テツド | Method and device for processing blood |
-
1985
- 1985-03-12 JP JP3521085U patent/JPS61153487U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930683B2 (en) * | 1979-12-11 | 1984-07-28 | リユ−カサイト・リサ−チ・インコ−ポレ−テツド | Method and device for processing blood |
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