JPH0332753U

JPH0332753U -

Info

Publication number: JPH0332753U
Application number: JP9273689U
Authority: JP
Priority date: 1989-08-07
Filing date: 1989-08-07
Publication date: 1991-03-29

Description

[Brief explanation of the drawing]

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。第３図は、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４図
は、チヤツキングマグネツトの着磁方法の他例を
示す平面図である。第５図は、チヤツキングマグ
ネツトの他の実施例を示す平面図であり、第６図
は第５図のＡ方向から見た側面図である。第７図
は、従来のチヤツキング装置の要部平面図である
。第８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９図は、第８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 parts of the chucking device. FIG. 3 is a plan view showing one example of the method of magnetizing the chuck magnet, and FIG. 4 is a plan view showing another example of the method of magnetizing the chuck magnet. FIG. 5 is a plan view showing another embodiment of the tracking magnet, and FIG. 6 is a side view seen from direction A in FIG. FIG. 7 is a plan view of essential parts of a conventional chucking device. Figure 8 shows the disk adsorption force along the circumferential direction of the outer periphery of the disk receiver when the disk adsorption plate is attracted to the disk receiver 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. 9 is a plan view showing the angular relationship in FIG. 8. 9...Disc suction plate, 10...Rotation drive shaft,
11... Drive pin, 17... Disk receiver, 19
...Chat King Magnet.

Claims

[Claims for Utility Model Registration] 1. 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. This is a recording/reproducing disk chucking device having an eccentric hole for recording and reproducing disks. It consists of a chucking magnet that is fixed to the body and that attracts the suction plate and places it on the disk receiver, and a drive pin that is pivotally fixed to the disk receiver and engages with the eccentric hole to drive rotation. A chucking device for a recording/reproducing disk, characterized in that the magnetic adsorption force of a portion of the chucking magnet located on the opposite side of the drive pin with respect to the rotational drive shaft is weakened. 2. The recording/reproducing disk tracking device according to item 1, wherein a portion of the tracking magnet located on the opposite side of the drive pin with respect to the rotational drive shaft is not magnetized.