JPH0241678U

JPH0241678U -

Info

Publication number: JPH0241678U
Application number: JP11824588U
Authority: JP
Priority date: 1988-09-08
Filing date: 1988-09-08
Publication date: 1990-03-22

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例としての磁気デイス
ク用スピンドルモータの構成を示す縦断面図、第
２図はその凹部とホールＩＣとの関係を示す説明
図、第３図はホールＩＣの収納状態を要部につい
て示す拡大斜視図、第４図は従来例としての磁気
デイスク用スピンドルモータの縦断面図である。
図において、１はハブ、２は回転軸、３，４は軸
受、５はモーターハウジング、７はステーター、
８はローターヨーク、９はローターマグネツト、
１０は回路基板、１１はインデツクス磁石、１２
は凹部、１２Ａは浅底、１２Ｂは深底、１３はホ
ールＩＣ、１３Ａはパツケージ、１３Ｂはリード
、１４は接着剤である。なお、図中同一符号は、
同一又は相当部分を示す。 Fig. 1 is a longitudinal cross-sectional view showing the configuration of a magnetic disk spindle motor as an embodiment of the present invention, Fig. 2 is an explanatory view showing the relationship between the recess and the Hall IC, and Fig. 3 is the storage of the Hall IC. FIG. 4 is an enlarged perspective view showing the state of main parts, and FIG. 4 is a longitudinal cross-sectional view of a conventional magnetic disk spindle motor.
In the figure, 1 is a hub, 2 is a rotating shaft, 3 and 4 are bearings, 5 is a motor housing, 7 is a stator,
8 is the rotor yoke, 9 is the rotor magnet,
10 is a circuit board, 11 is an index magnet, 12
12A is a shallow bottom, 12B is a deep bottom, 13 is a Hall IC, 13A is a package, 13B is a lead, and 14 is an adhesive. In addition, the same symbols in the figure are
Indicates the same or equivalent part.

Claims

[Claims for Utility Model Registration] (1) A rotating shaft rotatably supported by a motor housing via a bearing, a stator fixed concentrically to the rotating shaft on the outer periphery of the motor housing, and integrated with the rotating shaft. a hub that covers the outside of the stator and is provided with a rotor magnet on the inner periphery via a rotor yoke, which faces the stator; an index magnet provided on the end face of the rotor yoke; The hub has a circuit board mounted on a flat surface facing the end surface thereof, and a Hall IC for detecting an index signal provided on the flat surface of the motor housing at a position facing the index magnet, and the Hall IC includes: A spindle motor for a magnetic disk, characterized in that the entire motor housing is housed in a recess formed in a position facing an index magnet of the motor housing. (2) A rotating shaft rotatably supported by the motor housing via a bearing, a stator fixed on a concentric circle of the rotating shaft on the outer periphery of the motor housing, and a stator that is integrated with the rotating shaft and extends outside the stator. a hub having a rotor magnet disposed on the inner periphery via a rotor yoke to cover the stator and facing the stator; an index magnet provided on an end surface of the rotor yoke; and a flat portion of the motor housing facing the end surface of the hub. a circuit board mounted on the motor housing, and a Hall IC for detecting an index signal provided at a position facing the index magnet on a plane part of the motor housing, and the Hall IC:
A recess with two levels of depth is formed in the motor housing at a position facing the index magnet, the package is housed and fixed in the shallower recess, and the lead is arranged in the deeper recess. A spindle motor for magnetic disks characterized by: