Patent ID: 8803805
Filing Date: 2014-08-12
Classification: G06F

Abstract:
1. An indexing device, comprising: a first sensing unit, generating a first move detection signal; a second sensing unit, generating a second move detection signal; a control unit, coupled with the first sensing unit and the second sensing unit; and a positioning member; wherein the control unit operates to generate a cursor control signal in response to a variance of the first move detection signal and/or the second move detection signal; wherein one of the first sensing unit and second sensing unit comprises: wherein the sensing module outputs a light signal through the opening member for detecting a movement of the casing; wherein the sensing module comprises: wherein the sensor chip outputs the light signal through the lens set to the opening member; wherein the sliding board comprises: wherein the containing member has a perforating member directed toward the opening member and is formed corresponding to the lens set; and wherein the positioning member is disposed at one side of the sliding member for positioning the sensing module on the sliding member.