Patent attributes
According to one embodiment, there is provided a trackball device provided for an operation panel of a predetermined computer, the device includes a first casing including a housing portion, a ball rotatably housed in the housing portion, a detector provided in the housing portion and configured to detect input information based on rotation of the ball, and a second casing including an opening portion and mounted on the first casing to restrain the ball in the housing portion while part of the ball is exposed from the opening portion, wherein the second casing further comprises a ring portion which is provided along the opening portion and exposed from the operation panel when the trackball device is provided on the operation panel, and is configured to be detachable from the first casing upon application of a dynamic action to the ring portion.
