JPH0363807U

JPH0363807U -

Info

Publication number: JPH0363807U
Application number: JP12461989U
Authority: JP
Priority date: 1989-10-26
Filing date: 1989-10-26
Publication date: 1991-06-21
Anticipated expiration: 2003-10-06
Also published as: JPH0539447Y2

Description

[Brief explanation of the drawing]

第１図〜第３図は本考案の回転体の位置検出装
置の一実施例を示す図で、第１図は平面図、第２
図は第１図の矢視図、第３図は−線断面図
である。第４図Ａはセンサコイルの斜視図、第４
図Ｂはセンサコイルの回路基板に対する半田付け
の一例を示す説明図、第５図は本考案をフロツピ
デイスクドライバに適用した場合の平面図、第６
図は集束板の位置とインデツクスパルス発生位置
との関係を示す説明図、第７図は従来の回転体の
位置検出装置を３．５インチＦＤＤに応用した場
合の平面図、第８図はそのセンサ部分の拡大図で
ある。１……回転体（モータのロータ）、２……着磁
体（タグマグネツト）、３……センサコイル、４
……集束部材、５……ホルダー、６……回路基板
、７……フエライトコア、７ａ……上フランジ、
７ｂ……下フランジ、８……配線パターン、１０
……集束板、１１……押え板。 1 to 3 are diagrams showing one embodiment of the position detection device for a rotating body of the present invention, in which FIG. 1 is a plan view, and FIG.
The figure is a view taken along the arrow in FIG. 1, and FIG. 3 is a sectional view taken along the - line. Figure 4A is a perspective view of the sensor coil;
Figure B is an explanatory diagram showing an example of soldering the sensor coil to the circuit board, Figure 5 is a plan view when the present invention is applied to a floppy disk driver, and Figure 6 is an explanatory diagram showing an example of soldering the sensor coil to the circuit board.
The figure is an explanatory diagram showing the relationship between the position of the focusing plate and the index pulse generation position, Figure 7 is a plan view when a conventional rotating body position detection device is applied to a 3.5-inch FDD, and Figure 8 is It is an enlarged view of the sensor part. 1... Rotating body (motor rotor), 2... Magnetized body (tag magnet), 3... Sensor coil, 4
...Focusing member, 5...Holder, 6...Circuit board, 7...Ferrite core, 7a...Upper flange,
7b...Lower flange, 8...Wiring pattern, 10
... Focusing plate, 11... Pressing plate.

Claims

[Claims for Utility Model Registration] (1) A magnetized body provided on a rotating body to generate an index signal, a substrate facing the rotating body, and a magnetized body that is connected and fixed on the wiring pattern of the substrate to generate the magnetic field of the magnetized body. A sensor coil for detecting, a focusing member made of a magnetic material that focuses the magnetic field of the magnetized body on the sensor coil, and a holder that holds the focusing member so as to be movable in substantially parallel to the moving direction of the rotating body with respect to the substrate. A rotating body position detection device comprising: (2) A presser plate fixed to the holder and having a spring portion; and a presser plate that is pressed in close contact with the sensor coil by the spring portion of the presser plate and is movable relative to the substrate in parallel to the moving direction of the rotating body. 2. A position detecting device for a rotating body according to claim 1, wherein said focusing member is formed from a focusing plate made of a magnetic material.