JPH0488436U - - Google Patents
Info
- Publication number
- JPH0488436U JPH0488436U JP40085890U JP40085890U JPH0488436U JP H0488436 U JPH0488436 U JP H0488436U JP 40085890 U JP40085890 U JP 40085890U JP 40085890 U JP40085890 U JP 40085890U JP H0488436 U JPH0488436 U JP H0488436U
- Authority
- JP
- Japan
- Prior art keywords
- spindle motor
- cylindrical
- cylindrical magnet
- magnet
- 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
- 238000005259 measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
Landscapes
- Printers Characterized By Their Purpose (AREA)
- Handling Of Cut Paper (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Description
第１図は本考案に係るスピンドルモータの半截
断面図、第２図は円筒型マグネツトの端面を示す
拡大断面図で半径Ｒ＝１／４Ｔの場合の図、第３
図は半径Ｒ＝１／２Ｔの場合の図、第４図は半径
Ｒ＝３／４Ｔの場合の図、第５図は円筒型マグネ
ツト及び円筒型ヨークの端面に丸み部を形成した
状態を示す拡大断面図、第６図は漏洩磁束による
磁界の測定範囲及び測定方向を示す簡略図である
。第７図は従来のスピンドルモータの半截断面図
、第８図はそのマグネツトの端面の拡大断面図で
ある。
６……ステータ、７……円筒型マグネツト、１
０……丸み部、１１……丸み部、１２……端面、
１３……端面、Ｒ……半径、Ｔ……厚さ。
Fig. 1 is a half-cut sectional view of a spindle motor according to the present invention, Fig. 2 is an enlarged sectional view showing the end face of a cylindrical magnet with radius R = 1/4T, and Fig. 3
The figure shows a case where the radius R=1/2T, FIG. 4 shows a case where the radius R=3/4T, and FIG. The enlarged sectional view, FIG. 6, is a simplified diagram showing the measurement range and measurement direction of the magnetic field due to leakage magnetic flux. FIG. 7 is a half-cut sectional view of a conventional spindle motor, and FIG. 8 is an enlarged sectional view of the end face of the magnet. 6... Stator, 7... Cylindrical magnet, 1
0...Rounded part, 11...Rounded part, 12... End face,
13... End face, R... Radius, T... Thickness.
Claims (1)
７を備えたスピンドルモータに於て、 上記円筒型マグネツト７の端面１２に丸み部１
０を形成したことを特徴とするスピンドルモータ
。 ２ 円筒型マグネツト７の端面１２に形成した丸
み部１０の半径Ｒと、該円筒型マグネツトの厚さ
Ｔとの関係が、１／４Ｔ≦Ｒ≦３／４Ｔを満たす
ように設定した請求項１記載のスピンドルモータ
。 ３ ステータ６に近接対峙する円筒型マグネツト
７と、これに外嵌する円筒型ヨーク５を備えたス
ピンドルモータに於て、 上記円筒型マグネツト７及び円筒型ヨーク５の
端面１２，１３に、夫々、丸み部１０，１１を形
成したことを特徴とするスピンドルモータ。 ４ 円筒型マグネツト７及び円筒型ヨーク５の端
面１２，１３に、夫々形成した丸み部１０，１１
の半径Ｒと、該円筒型マグネツト７及び該円筒型
ヨーク５の夫々の厚さＴとの関係が、１／４Ｔ≦
Ｒ≦３／４Ｔを満たすように設定した請求項３記
載のスピンドルモータ。[Claims for Utility Model Registration] 1. In a spindle motor equipped with a cylindrical magnet 7 closely facing the stator 6, a rounded portion 1 is provided on the end surface 12 of the cylindrical magnet 7.
A spindle motor characterized in that a zero is formed. 2. Claim 1, wherein the relationship between the radius R of the rounded portion 10 formed on the end surface 12 of the cylindrical magnet 7 and the thickness T of the cylindrical magnet is set to satisfy 1/4T≦R≦3/4T. Spindle motor listed. 3. In a spindle motor equipped with a cylindrical magnet 7 closely facing the stator 6 and a cylindrical yoke 5 fitted onto the magnet, end surfaces 12 and 13 of the cylindrical magnet 7 and the cylindrical yoke 5 are provided with A spindle motor characterized in that rounded portions 10 and 11 are formed. 4 Rounded portions 10 and 11 formed on the end surfaces 12 and 13 of the cylindrical magnet 7 and the cylindrical yoke 5, respectively.
The relationship between the radius R and the thickness T of the cylindrical magnet 7 and the cylindrical yoke 5 is 1/4T≦
The spindle motor according to claim 3, wherein the spindle motor is set to satisfy R≦3/4T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40085890U JPH0488436U (en) | 1990-12-18 | 1990-12-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40085890U JPH0488436U (en) | 1990-12-18 | 1990-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0488436U true JPH0488436U (en) | 1992-07-31 |
Family
ID=31879040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP40085890U Pending JPH0488436U (en) | 1990-12-18 | 1990-12-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0488436U (en) |
-
1990
- 1990-12-18 JP JP40085890U patent/JPH0488436U/ja active Pending
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