In current environment for computer operation, it is obvious that a computer mouse is one of the essential peripheral equipment. Therefore, it becomes a common issue for R & D engineers in this field to develop a mouse easier and more suitable to be manipulated with hand.
Generally speaking, a conventional mouse housing structure 100, as shown in FIG. 1, is composed of a bottom portion 1, a held portion 2 and a key set 3, wherein the held portion 2 and the key set 3 are combined as a top portion of the mouse housing 100. The conventional mouse housing structure has a disadvantage of fixed holding angle, i.e. an angle of the held portion 2 relative to a surface the mouse is rested on, whereby the user has to adapt himself for the shape and angle of the held portion 2 of the mouse so that it is inconvenient to be manipulated for some users.
Accordingly, we can assume that if the held portion 2 of the mouse can change itself in an angle relative to a surface the mouse is rested on in response to the holding manners of various users, the mouse housing structure 100 will comply with the requirement in ergonomics.