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LIGHT PEN

  • US 20110075440A1
  • Filed: 12/21/2009
  • Published: 03/31/2011
  • Est. Priority Date: 09/28/2009
  • Status: Active Grant
First Claim
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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.

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