Patent ID: 8817338
Filing Date: 2014-08-26
Classification: H04N

Abstract:
1. A scan mechanism, configured to be used in a scan module, comprising: a rack, having a locking portion, an engaging surface, a bottom surface and a plurality of teeth disposed on the engaging surface, each of the teeth comprises a top end and a bottom end, the distance between the centers of any two adjacent top ends represented as W, the shortest distance from the top end of each tooth to the bottom surface of the rack represented as D, and W/D ranging from 0.56 to 0.79, the locking portion having a first locking surface with part of the teeth disposed thereon; and a scan unit, comprising a gear engaged with the teeth of the rack and configured to roll along the engaging surface of the rack, the first locking surface protruding from the engaging surface to stop the gear from rolling over the locking portion, the scan unit is slidably disposed on the rack through the gear.