Adjusting mechanism for a chair mounted keyboard and mouse platform

Abstract

The present invention is an assembly adapted for attachment to a chair. It includes a first embodiment adapted to support a computer keyboard (w/mouse platform) and a second embodiment adapted to support a computer mouse only. Both embodiments are releasably secured to the armrests of a chair and are pivotally and longitudinally adjustable. The keyboard-supporting embodiment is connected to both armrests and the mouse only supporting embodiment is connected to a left armrest for a left-handed mouse user and to the right armrest for a right-handed mouse user.

1 . An assembly adapted for attachment to single chair arm, comprising:
 a clamping means secured to said chair arm;   an extension bar pivotally connected to and extending outward from said clamping means, said extension bar having a first extent and a second extent, said first extent having a first and second end, said second extent having a first and second end, said first extent first end pivotally connected to said clamping means by a pivot adjustment means, said pivotal connection enabling said extension bar to be rotated relative to said chair arm, said pivot adjustment means offset from said chair arm, said second extent first end being capable of slideable movement within said first extent second end of said extension bar for providing the extension bar with an increasing and decreasing length;   a platform adapted to support a computer mouse, said platform having a top surface and a bottom surface, said bottom surface having a collar affixed thereto, said collar penetrably receiving said second extent second end therethrough, said collar allowing for 360 degree rotation of said platform about said second extent second end, said collar enabling said rotation of said platform into a preselected plane that is tilted by any preselected degree relative to a horizontal plane, said platform disposed transversely relative to said chair arm so that a computer mouse adapted to be supported thereby is positioned directly in front of a users arm resting on said chair arm.   
   
   
       2 . An assembly according to  claim 1  wherein said clamping means further comprises:
 a first fixed jaw having a top surface and a bottom surface;   a second fixed jaw rigidly connected to said first fixed jaw and parallel thereto; and   a moveable jaw disposed therebetween;   said second fixed jaw further comprising means for urging said moveable jaw upward against said chair arm for securing said chair arm between said first fixed jaw and said moveable jaw.   
   
   
       3 . An assembly according to  claim 2 , wherein said urging means is a threaded screw. 
   
   
       4 . An assembly according to  claim 2 , wherein said pivot adjustment means further includes:
 a fixed notched portion integral and extending outward from an outside edge of said first fixed jaw, said fixed notched portion positioned so as not to interfere with a users arm resting on said first fixed jaw top surface;   a mating portion integral and extending outward from said first extent first end, said mating portion further comprising a protuberance, said protuberance received within said fixed notched portion at a desired angle of adjustment; and   a locking screw in threaded engagement with said mating portion and said fixed notched portion, said screw urging together said protuberance within said fixed notched portion at a desired angle of adjustment.   
   
   
       5 . An assembly according to  claim 4 , wherein said fixed notched portion and said mating portion are semi-circular. 
   
   
       6 . An assembly according to  claim 1 , wherein said second extent first end extends longitudinally within said first extent second end of said extension bar and said second extent second end extends outward from said second extent first end at a 90 degree angle. 
   
   
       7 . An assembly according to  claim 1 , wherein said extension bar further includes locking means, said locking means securing said second extent first end within said first extent second end of said extension bar at a desired length. 
   
   
       8 . An assembly according to  claim 1 , wherein said collar further includes locking means, said locking means locking said collar along said second extent second end at a preselected platform adjustment angle. 
   
   
       9 . An assembly adapted for attachment to a first and second arm of a chair, said chair having a seat portion and a back portion, comprising:
 a first and second clamping means secured to said first and second chair arm;   a first and a second extension bar pivotally connected to and extending outward from said first and second clamping means, said first and second extension bars having a first extent and a second extent, said first extent pivotally connected at one end to said first and second clamping means by a first and second pivot adjustment means, said pivotal connection enabling said first and second extension bars to be rotated relative to said first and second chair arms, said first and second extent being capable of slideable movement within said first and second first extent of said first and second extension bars for providing said first and second extension bars with an increasing and decreasing length;   a platform adapted to support a computer keyboard, said platform having a top surface and a bottom surface, said bottom surface having a collar affixed at one end of said bottom surface, said collar penetrably receiving said first extension bar second extent therethrough, said collar allowing for rotation of said platform about said first extension bar second extent, said collar enabling said rotation of said platform from an open position where a user can get in an out of said chair to a closed position where the opposite end of said platform bottom surface rests on said second extension bar second extent, said platform being disposed transversely relative to said chair seat portion.   
   
   
       10 . An assembly according to  claim 9 , wherein said first and said second clamping means further comprises:
 a first fixed jaw;   a second fixed jaw rigidly connected to said first fixed jaw and parallel thereto; and   a moveable jaw disposed therebetween;   said second fixed jaw further comprising means for urging said moveable jaw upward against said first and said second chair arms for securing said chair arms between said first fixed jaw and said moveable jaw.   
   
   
       11 . An assembly according to  claim 10 , wherein said urging means is a threaded screw. 
   
   
       12 . An assembly according to  claim 10 , wherein said first and second pivot adjustment means further includes:
 a fixed notched portion integral and extending outward from said first fixed jaw;   a mating portion integral and extending outward from said one end of said first extent and said second extent, said mating portion further comprising a protuberance, said protuberance received within said fixed notched portion at a desired angle of adjustment; and   a locking screw in threaded engagement with said mating portion and said fixed notched portion, said screw urging together said protuberance within said fixed notched portion at a desired angle of adjustment.   
   
   
       13 . An assembly according to  claim 12 , wherein said fixed notched portion and said mating portion are semi-circular. 
   
   
       14 . An assembly according to  claim 9 , wherein said first and second extension bar further includes locking means, said locking means securing said first and second extent within said first and second first extent of said first and second extension bar at a desired length. 
   
   
       15 . An assembly according to  claim 9 , wherein said collar further includes locking means, said locking means locking said collar along said first second extent at a preselected platform adjustment angle.