| 摘要 |
The present invention, functioning as either a mouse, trackball, or combination of both, allows the user to achieve a truly neutral operating position. This positioning, preferred by occupational therapists, forms the basis of the numerous ergonomic advantages of the invention. The invention permits neutral positioning by providing a formed hand support pad on top of a lower housing on which the side of the user's hand rests. Thus the invention is passively held by the weight of the user's hand and may be moved across the work surface without the constant stress of holding the device. An adjustable upper housing, mounted on the lower housing, is shaped and positioned to fit comfortably within the vertical palm of the user's hand. The upper housing contains the mouse buttons and trackball and is adjustable about an axis perpendicular to the work surface to allow use of the invention by right and left hand users having a variety of hand sizes. The design and position of the upper housing also provides a place for the thumb to comfortably rest. Finally, operation of the buttons and trackball require only the natural flexing or squeezing motion of the fingers and thumb.
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