Optical touch device and foldable frame assembly thereof

Abstract

A foldable frame assembly is adapted for an optical touch device. The foldable frame assembly includes a first frame, a second frame and a third frame. The second frame is pivotally connected to a first end of the first frame and the third frame is pivotally connected to a second end of the first frame, wherein the first end is opposite to the second end. The second frame and the third frame can rotate with respect to the first frame so as to be folded or expanded with respect to the first frame.

What is claimed is: 
     
         1 . A foldable frame assembly adapted for an optical touch device comprising:
 a first frame;   a second frame pivotally connected to a first end of the first frame; and   a third frame pivotally connected to a second end of the first frame, the first end being opposite to the second end;   wherein the second frame and the third frame are capable of rotating with respect to the first frame so as to be folded or expanded with respect to the first frame.   
     
     
         2 . The foldable frame assembly of  claim 1 , further comprising a pivot member pivotally connected to the first end of the first frame, the second frame being pivotally connected to the pivot member, the second frame and the third frame being capable of rotating with respect to the first frame in an identical direction so as to be folded on opposite sides of the first frame. 
     
     
         3 . The foldable frame assembly of  claim 1 , wherein the first frame has an accommodating recess, the second frame and the third frame are capable of rotating with respect to the first frame in an identical direction so as to be folded on opposite sides of the first frame, the second frame is accommodated in the accommodating recess, and the third frame is stacked on the first frame. 
     
     
         4 . The foldable frame assembly of  claim 1 , wherein the second frame and the third frame are capable of rotating with respect to the first frame in reversed directions so as to be folded on an identical side of the first frame. 
     
     
         5 . The foldable frame assembly of  claim 4 , wherein when the second frame and the third frame are folded on the identical side of the first frame, the second frame is stacked on the first frame and the third frame is stacked on the second frame. 
     
     
         6 . The foldable frame assembly of  claim 1 , wherein the second frame comprises a first sub-frame and a second sub-frame, the first sub-frame is pivotally connected to the first end of the first frame, the second sub-frame is pivotally connected to the first sub-frame, the third frame comprises a third sub-frame and a fourth sub-frame, the third sub-frame is pivotally connected to the second end of the first frame, the fourth sub-frame is pivotally connected to the third sub-frame, the foldable frame assembly further comprises a fourth frame, opposite ends of the fourth frame are pivotally connected to the second sub-frame and the fourth sub-frame respectively, the first, second, third and fourth sub-frames are capable of rotating with respect to the first and fourth frames so as to be folded or expanded between the first and fourth frames. 
     
     
         7 . The foldable frame assembly of  claim 6 , wherein the second frame further comprises a first pivot member, opposite ends of the first pivot member are pivotally connected to the first and second sub-frames respectively, the third frame further comprises a second pivot member, and opposite ends of the second pivot member are pivotally connected to the third and fourth sub-frames respectively. 
     
     
         8 . An optical touch device comprising:
 a foldable frame assembly comprising:
 a first frame; 
 a second frame pivotally connected to a first end of the first frame; and 
 a third frame pivotally connected to a second end of the first frame, the first end being opposite to the second end, the second frame and the third frame being capable of rotating with respect to the first frame so as to be folded or expanded with respect to the first frame; 
   two image sensing units disposed on the second frame and the third frame respectively; and   two light emitting units disposed on the second frame and the third frame respectively and adjacent to the two image sensing units respectively.   
     
     
         9 . The optical touch device of  claim 8 , wherein the foldable frame assembly further comprises a pivot member pivotally connected to the first end of the first frame, the second frame is pivotally connected to the pivot member, the second frame and the third frame are capable of rotating with respect to the first frame in an identical direction so as to be folded on opposite sides of the first frame. 
     
     
         10 . The optical touch device of  claim 8 , wherein the first frame has an accommodating recess, the second frame and the third frame are capable of rotating with respect to the first frame in an identical direction so as to be folded on opposite sides of the first frame, the second frame is accommodated in the accommodating recess, and the third frame is stacked on the first frame. 
     
     
         11 . The optical touch device of  claim 8 , wherein the second frame and the third frame are capable of rotating with respect to the first frame in reversed directions so as to be folded on an identical side of the first frame. 
     
     
         12 . The optical touch device of  claim 11 , wherein when the second frame and the third frame are folded on the identical side of the first frame, the second frame is stacked on the first frame and the third frame is stacked on the second frame. 
     
     
         13 . An optical touch device comprising:
 a foldable frame assembly comprising:
 a first frame; 
 a second frame comprising a first sub-frame and a second sub-frame, the first sub-frame being pivotally connected to a first end of the first frame, the second sub-frame being pivotally connected to the first sub-frame; 
 a third frame comprising a third sub-frame and a fourth sub-frame, the third sub-frame being pivotally connected to a second end of the first frame, the fourth sub-frame being pivotally connected to the third sub-frame, the first end being opposite to the second end; and 
 a fourth frame, opposite ends of the fourth frame being pivotally connected to the second sub-frame and the fourth sub-frame respectively, the first, second, third and fourth sub-frames being capable of rotating with respect to the first and fourth frames so as to be folded or expanded between the first and fourth frames; 
   two image sensing units disposed on opposite ends of the fourth frame respectively; and   two light emitting units disposed on opposite ends of the fourth frame respectively and adjacent to the two image sensing units respectively.   
     
     
         14 . The optical touch device of  claim 13 , wherein the second frame further comprises a first pivot member, opposite ends of the first pivot member are pivotally connected to the first and second sub-frames respectively, the third frame further comprises a second pivot member, and opposite ends of the second pivot member are pivotally connected to the third and fourth sub-frames respectively. 
     
     
         15 . A foldable frame assembly adapted for an optical touch device comprising:
 a first frame comprising a first sub-frame and a second sub-frame, the first sub-frame and the second sub-frame being detachably connected to each other;   a second frame pivotally connected to the first sub-frame;   a third frame pivotally connected to the second sub-frame; and   a fourth frame, opposite ends of the fourth frame being pivotally connected to the second frame and the third frame respectively;   wherein when the first sub-frame and the second sub-frame are detached from each other, the first sub-frame and the second sub-frame are capable of rotating with respect to the second frame and the third frame respectively and the second frame and the third frame are capable of rotating with respect to the fourth frame so as to be folded with respect to the fourth frame.   
     
     
         16 . The foldable frame assembly of  claim 15 , wherein the second frame has a first accommodating recess for accommodating the first sub-frame, the third frame has a second accommodating recess for accommodating the second sub-frame, and the fourth frame has a third accommodating recess for accommodating the second frame and the third frame. 
     
     
         17 . An optical touch device comprising:
 a foldable frame assembly comprising:
 a first frame comprising a first sub-frame and a second sub-frame, the first sub-frame and the second sub-frame being detachably connected to each other; 
 a second frame pivotally connected to the first sub-frame; 
 a third frame pivotally connected to the second sub-frame; and 
 a fourth frame, opposite ends of the fourth frame being pivotally connected to the second frame and the third frame respectively, wherein when the first sub-frame and the second sub-frame are detached from each other, the first sub-frame and the second sub-frame are capable of rotating with respect to the second frame and the third frame respectively and the second frame and the third frame are capable of rotating with respect to the fourth frame so as to be folded with respect to the fourth frame; 
   two image sensing units disposed on opposite ends of the fourth frame respectively; and   two light emitting units disposed on opposite ends of the fourth frame respectively and adjacent to the two image sensing units respectively.   
     
     
         18 . The optical touch device of  claim 17 , wherein the second frame has a first accommodating recess for accommodating the first sub-frame, the third frame has a second accommodating recess for accommodating the second sub-frame, and the fourth frame has a third accommodating recess for accommodating the second frame and the third frame.