CARTRIDGE FOR MANAGING EAR BUD CABLES HAVING A CONSTANT TORQUE SPRING
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United States of America Patent
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N/A
Issued Date -
Mar 7, 2013
app pub date -
Feb 24, 2012
filing date -
Mar 1, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A cartridge for managing ear bud cables includes a housing, a hub, a spool and an ear bud cable. Rotation of the spool selectively retracts and dispenses the ear bud cables while enabling continuous audio communication between the at least one ear bud and an audio device. A motor assembly rotates the spool. The motor assembly includes a drive gear and a first storage drum, a first constant torque spring wound at least partially about the first storage drum and the drive gear for applying torque to the drive gear. The first storage drum and the drive gear are distanced from each other to enable a length of the spring to extends between the storage drum and the drive gear to apply constant torque to the drive gear. The constant torque has a variability of no more than +/−10%.
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