초록 ▼

In order to make an arm supporting base small, to enable the arm supporting base to move horizontally and rotatably, to prevent an occurrence of a fatigue of the arm operating a mouse for personal computer and to enhance the efficiency of work, a plurality of ball bearings are interposed between a m

In order to make an arm supporting base small, to enable the arm supporting base to move horizontally and rotatably, to prevent an occurrence of a fatigue of the arm operating a mouse for personal computer and to enhance the efficiency of work, a plurality of ball bearings are interposed between a movable base and a fixed base in such a manner as the movable base is prevented from being removed from the fixed base and the movable base may move in all directions relatively to the fixed base in a certain range.

대표청구항 ▼

[ What is claimed is:] [1.] An arm supporting base, comprising:an elliptic fixed base, in which a circular hole is formed;an elliptic movable base, which is disposed above the fixed base having a boss protruded down through the circular hole, the boss allowing the movable base to move freely in two

[ What is claimed is:] [1.] An arm supporting base, comprising:an elliptic fixed base, in which a circular hole is formed;an elliptic movable base, which is disposed above the fixed base having a boss protruded down through the circular hole, the boss allowing the movable base to move freely in two dimensions;at least three ball bearings provided on the fixed base around the hole;a back plate larger in diameter than the circular hole to be fixed to a tip end of the bossbeneath the circular hole;a second circular hole in the fixed base such that the first circular hole and the second circular hole are formed at opposite portions along the long axis of the fixed base, the movable base has a second boss protruded down through the second circular hole; anda second back plate larger in diameter than the second circular hole to be fixed to a tip end of the second boss beneath the second circular hole.