Patent ID: 6535305
Filing Date: 2003-03-18
Classification: H04N

Abstract:
An transmission mechanism for optical scanner, comprising:an enalogate rotationable screw bar having threads formed on outside surface thereof; a first nut having internal threads formed in an internal round opening engageable with the threads of the screw bar; a second nut having internal threads formed in an internal round opening engageable with the threads of the screw bar, the second nut being spaced from the first nut and being remote from the transmission direction; a hollow retainer having a front wall and a rear wall for holding the first and second nut therebetween, the front wall being contact with the first nut; a first compressed spring located between the first and second nut; and a second compressed spring located between the second nut and the rear wall; wherein the second spring has stronger force than the first spring such that a rear surface of the internal threads of the first nut make close contact with the threads of the screw bar, and a front surface of the internal threads of the second nut make close contact with the threads of the screw bar.