Abstract: An operation control device includes a housing, a control module having a movable operating device carried on a carrier frame in the housing and partially exposed to the outside and rotatable and axially slidable by the user, a circuit module, which includes a rotation sensor module for sensing the direction and amount of rotation of the movable operating device and producing a respective control signal and magnetic sensors for sensing the direction and amount of axial displacement of the movable operating device in a non-contact manner. The human-friendly design of the operation control device facilitates cursor control, assuring high operation stability and comfort.

Abstract: A wrist protector includes a protector body having a flexible base member defining therein an accommodation chamber and a fastening structure adapted for fastening the flexible base member to a user's wrist, and a hard support plate detachably set in the accommodation chamber of the flexible base member to give support to the user's wrist. The hard support plate is orthopedically engineered, having opposing first positioning portion and second positioning portion and a high-rise portion connected between the first positioning portion and the second positioning portion and defining a high-rise space therebelow. Different heights of hard support plates can be selectively used with the protector body to fit different users, enabling the user to operate a computer keyboard or mouse comfortably for a long period of time without causing pain.

Abstract: An operation control device includes a housing, a control module having a movable operating device carried on a carrier frame in the housing and partially exposed to the outside and rotatable and axially slidable by the user, a circuit module, which includes a rotation sensor module for sensing the direction and amount of rotation of the movable operating device and producing a respective control signal and magnetic sensors for sensing the direction and amount of axial displacement of the movable operating device in a non-contact manner. The human-friendly design of the operation control device facilitates cursor control, assuring high operation stability and comfort.