Patent ID: 7948473

Claim:
A mouse device comprising: a main body including an upper surface for resting a user's palm thereon and a lower surface to be in contact with a working plane; and a mouse foot pad fixed on said lower surface of said main body to prevent said lower surface from being in direct contact with said working plane and to inhibit abrasion of said lower surface by said working plane, said mouse foot pad including a first layer with a first friction coefficient μ 1 and a second layer with a second friction coefficient μ 2 , said second friction coefficient μ 2 being greater than said first friction coefficient μ 1 , wherein said first layer and said second layer are formed as a laminate, said second layer is bonded to said lower surface of said main body, and said first layer is in contact with said working plane when the mouse device is operated, wherein said first layer abrades after a period of use to expose said second layer which impairs movement of said mouse device in contact with said working plane, thereby reminding said user to change said mouse foot pads, wherein said exposed second layer prevents said lower surface from being in direct contact with said working plane to inhibit abrasion of said lower surface by said working plane, and wherein said second layer further includes a salient portion partially embedded into said perforation of said first layer.