Clamping device for magnetic disk

Abstract

The invention provides a chucking device for magnetic disk arranged so as to always accurately perform the write-in / read-out operation by realizing the front and outer supports to prevent the eccentric rotation of a recording disk. The device is provided with a nearly disk-like bearing and a driving arm 15 extended along the circumferential direction on the rear side of a rotor yoke 11 and suspended and held in the loose state at the both ends by the rotor yoke 11, and the inner circumferential surface 15a is formed on the driving arm 15 for controlling the movement to the bearing side, and a driving pin which is extended upward by feeding through a driving pin passing hole 14 of the rotor yoke 11 and inserted to a driving hole of the magnetic disk in the loose state, is formed on the front part in the rotating direction of the rotor yoke of the driving arm 15, then the chucking device for magnetic disk having such a feature is adopted that the inner circumferential surface 15a of the driving arm 15 is separated from the bearing when the rotor yoke 11 placing the magnetic disk thereon is rotated and also the driving pin is abutted on a front side edge 4a and an outer side edge 4b of the driving hole 4.

Description

technical field [0001] The invention relates to a clamping device for a magnetic disk. Background technique [0002] A disk represented by a floppy disk is usually inserted into the disk drive in the form of a cartridge. The film-like recording disk in the cartridge is housed in the case, and the recording disk can rotate inside the disk drive. The output or input of information is carried out through the writing / reading window with a baffle on the box body. The recording disk needs to be easy to assemble and disassemble after being housed in the case, and when writing / reading information, the recording disk needs to be accurately engaged with the rotating shaft of the disk drive device, and its rotation speed must also be accurately controlled. For this reason, disk drives are usually provided with Figure 7 and Figure 8 clamping device shown. [0003] The center of the floppy disk recording disc is equipped with a central core made of a ferromagnetic metal disc. exist...

AI Technical Summary

Problems solved by technology

[0012] However, in the conventional clamping device, in order to realize the front / outer support of the driving pin, the fixed pin 101b for swinging the clamping arm 105 is adopted, so the number of parts is increased, and it is necessary to set and fix the clamping device when manufacturing this clamping device. Using the corresponding positions of the hole 105c and the hole portion 101a, or performing operations such as piercing and riveting of the fixing pin 101b, not only the assembly process is complicated, but also the manufacturing cost is increased.

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