Patent ID: 8292485
Filing Date: 2012-10-23
Classification: G06F

Abstract:
1. A light pen comprising: a case; a light source disposed in the case for emitting light; a pen-nib structure movably disposed through an end of the case, an opening being formed on the pen-nib structure; a first lens device movably disposed between the light source and the pen-nib structure for guiding the light emitted by the light source to the opening; an elastic piece connected to the first lens device for engaging with the pen-nib structure to fix a position of the pen-nib structure relative to the first lens device; a hollow knob rotatably sheathing the first lens device; and a linkage pipe sheathing a side of the first lens device and connected to the hollow knob, the linkage pipe being used for driving the elastic piece to move away from the pen-nib structure when the hollow knob rotates to a first position relative to the first lens device so that the pen-nib structure is capable of moving relative to the case and for being separate from the elastic piece when the hollow knob rotates to a second position so as to cause the elastic piece to engage with the pen-nib structure.