A competition arbitration system in which chances for using a resource of a computer such as a bus or the like among devices are fair is provided. A sensing device may generate a signal or a detector may receive a signal indicating that a predetermined period of time has lapsed or that some other criteria has been met indicating that the storage media should be removed from the storage media drive. The base member and the leather include an adhering portion bonded by an adhering agent, a sewing portion formed by being sewn at outer peripheral portions of the base member and the leather, and a nonbonding portion in which the base member and the leather are not bonded between the adhering portion and the sewing portion. The actuator constituted by the first and second coils and the magnet member can be compactly arranged in one region in the apparatus. Accordingly, the filter inductor is used in the low pass filter to provide an impedance transformation so as to operate with the detector circuitry to provide a detector current for directional coupling.