Browse Prior Art Database

Reset Device for Cartridge Location Pin

IP.com Disclosure Number: IPCOM000106536D
Original Publication Date: 1993-Nov-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Henry, M: AUTHOR [+2]

Abstract

The disclosed reset device moves a cartridge lock pin to a lower position releasing a cartridge trapped in an unpowered optical drive.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Reset Device for Cartridge Location Pin

      The disclosed reset device moves a cartridge lock pin to a
lower position releasing a cartridge trapped in an unpowered optical
drive.

      The media disk for an optical storage device is housed in a
protective cartridge.  To properly mount the media into the drive,
the cartridge needs to be held inside the drive relative to some
drive datums.  The spindle motor is also located relative to these
datums.  This ensures reliable engagement of the media disk on the
spindle motor.

      Typically, the cartridge design includes datum features, e.g.,
a hole and a slot, that correspond to and match the datums in the
drive, e.g., stepped pins, to hold the cartridge in place, are also
included in the cartridge design.  These holding features are usually
different that the datum features that position the cartridge inside
the drive.  The holding features, e.g., notches, recesses, are
located and dimensioned relative to the datums.

      When a cartridge is inserted into a drive, one function of the
load/unload mechanism is to hold the cartridge inside the drive at a
location where the datum features in the cartridge are aligned to the
mating datum features in the drive.  Once the datums are aligned, the
load/unload mechanism can move the cartridge to engage the datums and
thus the media disk to the spindle motor.

      As the cartridge is inserted into a drive, spring loaded "datum
pins" go up and into the datum holes in the cartridge.  This action
locks the...