JPH0337647U

JPH0337647U -

Info

Publication number: JPH0337647U
Application number: JP9731689U
Authority: JP
Priority date: 1989-08-21
Filing date: 1989-08-21
Publication date: 1991-04-11

Description

[Brief explanation of drawings]

第１図は、本考案の一実施例を示し、チヤツキ
ング装置の断面図。第２図は、チヤツキング装置
の要部平面図であり、第３図は、他の一例を示す
チヤツキング装置の要部平面図。第４図は、さら
に他の一例を示すチヤツキング装置の要部平面図
である。第５図は、第２図のチヤツキングマグネ
ツトの着磁方法の一例を示す平面図であり、第６
図は、第３図のチヤツキングマグネツトの着磁方
法の一例を示す平面図であり、第７図は第４図の
チヤツキングマグネツトの着磁方法の一例を示す
平面図である。第８図は、従来のチヤツキング装
置の要部平面図である。第９図は、デイスク吸着
板がデイスク受体に吸着され、さらにデイスクの
駆動ピン係合穴と駆動ピンとが接触していない状
態における、デイスク受体の外周縁の円周方向に
沿うデイスク吸着力の様子を示す吸着力特性図。
第１０図は、第９図の角度関係を表す平面図であ
る。９……デイスク吸着板、１０……回転駆動軸、
１１……駆動ピン、１７……デイスク受体、１９
……チヤツキングマグネツト。 FIG. 1 shows an embodiment of the present invention, and is a sectional view of a chucking device. FIG. 2 is a plan view of the main part of the chucking device, and FIG. 3 is a plan view of the main part of the chucking device showing another example. FIG. 4 is a plan view of a main part of a chucking device showing still another example. FIG. 5 is a plan view showing an example of a method of magnetizing the tracking magnet shown in FIG.
7 is a plan view showing an example of the method of magnetizing the charging magnet shown in FIG. 3, and FIG. 7 is a plan view showing an example of the method of magnetizing the charging magnet of FIG. 4. . FIG. 8 is a plan view of essential parts of a conventional chucking device. Figure 9 shows the disk adsorption force along the circumferential direction of the outer periphery of the disk support when the disk suction plate is attracted to the disk support and the drive pin engagement hole of the disk is not in contact with the drive pin. An adsorption force characteristic diagram showing the situation.
FIG. 10 is a plan view showing the angular relationship in FIG. 9. 9...Disc suction plate, 10...Rotation drive shaft,
11... Drive pin, 17... Disk receiver, 19
...Chat King Magnet.

Claims

[Claims for Utility Model Registration] A suction plate that can be attracted by a magnet is provided in the center, and the suction plate has a center hole approximately in the center for centering, and separate from the center hole for transmitting rotational drive. A recording/reproducing disk chucking device having an eccentric hole, comprising: a substantially circular disk receiver that is attached to a rotational drive shaft that engages with the center hole and rotates together with the rotational drive shaft; and the disk receiver. a chucking magnet which is fixed to the disc holder and which attracts the suction plate and places it on the disc holder; and a drive pin which is pivotally supported by the disc holder and engages with the eccentric hole to drive rotation; With respect to the state in which the suction plate is attracted to the disk receiver, the suction force of the chucking magnet to attract the suction plate is applied to the rotational drive shaft around the outer periphery of the disk receiver. A recording/reproducing disk tracking device characterized in that the recording/reproducing disk tracking device is configured to be equal to each other at 180° opposing positions.