Abstract: A basketball game device includes a backboard to which a mount is attached for supporting a rim loop ring. A detector is mounted to an underside of the mount and transmits ultrasonic waves to a work space below the rim loop ring. The work space has an outer bound beyond distance of a remote edge of the rim loop ring. A valid distance within the remote edge of the rim loop ring is set in the detector. The detector repeatedly generates ultrasonic waves toward an object and detects the reflected signals representing a series of data corresponding to distances of the object. If the first data of the series of data indicates a distance shorter than the valid distance, the goal is considered legal and if the first data is a distance greater than the valid distance, the goal is illegal.

Abstract: An inductive score device comprises a casing, a cantilever, a resilient member, and a photoelectric element, wherein the cantilever is rotatable and normally held horizontally in the casing by taking advantage of the resilient member and a counterbalance mechanism, and is depressible downwardly by an external force and restorable by the resilient member every time the external force is removed. When the cantilever is moved downwardly, an interruption piece thereof will interrupt the light route of the photoelectric element to change the state thereof and trigger the score device to count automatically.