Patent ID: 8274663
Filing Date: 2012-09-25
Classification: G01B

Abstract:
1. A thickness detecting mechanism for detecting a thickness of a to-be-measured article that is introduced into an electronic device, said thickness detecting mechanism comprising: a detecting arm moved as said to-be-measured article introduced into said electronic device is sustained against said detecting arm, wherein said detecting arm is located in a first position before said to-be-measured article is sustained against said detecting arm, and said detecting arm is located in a second position when said to-be-measured article is sustained against said detecting arm; an optical displacement sensing module disposed at a side of said detecting arm for detecting a displacement amount of said detecting arm from said first position to said second position, to generate a first image signal corresponding to said detecting arm at said first position and a second image signal corresponding to said detecting arm at said second position, thereby acquiring said thickness of said to-be-measured article by comparing a difference between said first image signal and said second image signal; a case for sheltering said thickness detecting mechanism, wherein said case further comprises a supporting part, which is sustained against another side of said detecting arm for preventing from rocking of said detecting arm during movement of said detecting arm, wherein said case further comprises a gliding slot, and said gliding slot has a gliding slot bottom; a spring, wherein an end of said spring is connected with said case, the other end of said spring is connected with said detecting arm, and after said to-be-measured article is transported across said detecting arm and no longer sustained against said detecting arm, an elastic force of said spring is offered to return said detecting arm from said second position to said first position; wherein said detecting arm further comprises a protrusion disposed at another side of said detecting arm and inserted into said gliding slot, said protrusion is supported on said gliding slot bottom when said detecting arm is located in said first position, and said detecting arm is moved and said protrusion is moved in said gliding slot when said to-be-measured article is introduced into said thickness detecting mechanism and sustained against said detecting arm; and wherein after said to-be-measured article is transported across said detecting arm and no longer sustained against said detecting arm, said detecting arm is returned to said first position, and said protrusion is returned to said gliding slot bottom and supported on said gliding slot bottom.