Abstract: A finger clamping device and an oximeter using the finger clamping device are provided. The finger clamping device includes a shell, an upper clamping member, and a lower clamping member. The shell includes two oppositely facing sidewalls. Each sidewall defines at least one sliding rail. The upper clamping member is arranged in the shell and defines two guiding rods. The two guiding rods are received in and slide along the sliding rail. At least one elastic member joins the lower clamping member and the upper clamping member and is tensioned when a finger is inserted between the upper clamping member and the lower clamping member.

Abstract: An oximeter includes a main body defining an opening and a finger clamping device arranged in the opening. The finger clamping device includes a shell, an upper clamping member, and a lower clamping member. The shell includes an inner wall carrying a sliding rail. The upper clamping member is arranged in the shell and defines a spindle. A portion of the spindle is received in the sliding rail and can slide along the sliding rail. The lower clamping member faces the upper clamping member and is coupled to the upper clamping member by a torsion spring. A finger being inserted between the upper clamping member and the lower clamping member causes the torsion spring to stretch, the finger is thus clamped by the upper clamping member and the lower clamping member with an elastic restoring force.

Abstract: An opening and closing structure arranged on a casing of an electronic device includes a cover plate and at least one connecting assembly. The cover plate is arranged inside a groove defined in an outer surface of the casing. The connecting assembly includes a connecting rod. A first end of the connecting rod is coupled to the cover plate. A second end of the connecting rod passes through the groove. The connecting rod is slidable within the casing to allow the cover plate to open and close relative to the casing.