JPH0164977U - - Google Patents
Info
- Publication number
- JPH0164977U JPH0164977U JP1987157939U JP15793987U JPH0164977U JP H0164977 U JPH0164977 U JP H0164977U JP 1987157939 U JP1987157939 U JP 1987157939U JP 15793987 U JP15793987 U JP 15793987U JP H0164977 U JPH0164977 U JP H0164977U
- Authority
- JP
- Japan
- Prior art keywords
- spindle motor
- driving magnet
- index
- notch
- index signal
- 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
- 230000004907 flux Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Brushless Motors (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Description
第１図は本考案の一実施例によるスピンドルモ
ータのインデツクス機構の構成を示す断面図、第
２図は回転子の駆動用マグネツト面から見た磁気
センサとの位置関係を示す平面図、第３図は磁気
センサと駆動用マグネツト及びヨークとの位置関
係を示す拡大断面側面図、第４図は本実施例によ
るスピンドルモータのインデツクス機構のインデ
ツクス信号の実測データを示す図、第５図は従来
のスピンドルモータのインデツクス機構のインデ
ツクス信号の実測データを示す図、第６図は従来
のインデツクスマグネツトを用いたスピンドルモ
ータのインデツクス機構の断面図、第７図は磁気
センサとインデツクスマグネツトとの位置関係を
示す平面図である。
１：駆動用マグネツト、２，２０：ヨーク、２
ａ：絞り立上り部、２ｂ：欠損部、３：磁気セン
サ、４：インデツクスマグネツト、２１ａ，２１
ｂ：爪、２１ｃ：平坦部。
FIG. 1 is a sectional view showing the configuration of an index mechanism of a spindle motor according to an embodiment of the present invention, FIG. 2 is a plan view showing the positional relationship with a magnetic sensor as seen from the drive magnet surface of the rotor, The figure is an enlarged cross-sectional side view showing the positional relationship between the magnetic sensor, the driving magnet, and the yoke, FIG. 4 is a diagram showing the measured data of the index signal of the index mechanism of the spindle motor according to this embodiment, and FIG. 5 is the diagram of the conventional one. Fig. 6 is a sectional view of a spindle motor index mechanism using a conventional index magnet, and Fig. 7 is a diagram showing the actual measurement data of the index signal of the index mechanism of a spindle motor. FIG. 3 is a plan view showing the positional relationship. 1: Drive magnet, 2, 20: Yoke, 2
a: Aperture rising portion, 2b: Missing portion, 3: Magnetic sensor, 4: Index magnet, 21a, 21
b: claw, 21c: flat part.
Claims (1)
タよりインデツクス信号を得るためのスピンドル
モータのインデツクス機構において、 回転子の駆動用マグネツトを保持し、かつ前記
駆動用マグネツトを包囲する外周の一部に成形さ
れた薄肉部分に切欠部を有するヨークと、 前記切欠部からもれる前記駆動用マグネツトの
もれ磁束を検知する磁気センサとから前記スピン
ドルモータを構成し、前記磁気センサの出力によ
り前記インデツクス信号を得ることを特徴とする
スピンドルモータのインデツクス機構。[Claims for Utility Model Registration] An indexing mechanism for a spindle motor for obtaining an index signal from a spindle motor for rotationally driving a magnetic medium, which holds a driving magnet for a rotor and surrounds the driving magnet. The spindle motor is constituted by a yoke having a notch in a thin part formed on a part of the outer periphery, and a magnetic sensor that detects leakage magnetic flux of the driving magnet leaking from the notch, An index mechanism for a spindle motor, characterized in that the index signal is obtained by output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987157939U JPH0164977U (en) | 1987-10-15 | 1987-10-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987157939U JPH0164977U (en) | 1987-10-15 | 1987-10-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0164977U true JPH0164977U (en) | 1989-04-26 |
Family
ID=31437818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987157939U Pending JPH0164977U (en) | 1987-10-15 | 1987-10-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0164977U (en) |
-
1987
- 1987-10-15 JP JP1987157939U patent/JPH0164977U/ja active Pending
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