Patent ID: 8355000

Claim:
A tumbler mouse, comprising: a housing including a swaying portion and a main portion divided by an imaginary plane; the swaying portion including a curved wall connecting to a planar wall of the housing, a support point being formed at a joining point of the curved wall and the planar wall, wherein when the tumbler mouse is laid down on a support surface, the imaginary plane passes through the support point and is perpendicular to the support surface; and a balancing weight secured in the swaying portion, wherein the position of the balancing weight makes the tumbler mouse have a center of gravity located on a side of the imaginary plane away from the swaying portion and when the tumbler mouse perpendicularly stands on the support surface at a contacting point, a distance between the center of gravity and the contacting point is less than any distance from the center of gravity to the curved wall.