Abstract: [Problem] To provide a universal speaker that efficiently transmits kinetic energy that has been converted from electrical energy of an audio signal to one or more diaphragms, and enables both healthy individuals and the hard of hearing to comfortably hear as a result of higher-volume and sharp emitted-sound. [Solution] This universal speaker (10) is provided at least with a diaphragm (1) having a planar shape, a driver unit (2) for causing the diaphragm to vibrate in accordance with an inputted electrical signal, and an enclosure (3) with a hollow structure for accommodating the diaphragm and the driver unit. The enclosure has an opening (39) at one surface, and the driver unit abuts against an end edge of the diaphragm so as to drive in the same direction as the plane direction of the diaphragm and is also fixedly mounted onto the enclosure.

Abstract: [Problem] To provide a universal speaker that efficiently transmits kinetic energy that has been converted from electrical energy of an audio signal to one or more diaphragms, and enables both healthy individuals and the hard of hearing to comfortably hear as a result of higher-volume and sharp emitted-sound. [Solution] This universal speaker (10) is provided at least with a diaphragm (1) having a planar shape, a driver unit (2) for causing the diaphragm to vibrate in accordance with an inputted electrical signal, and an enclosure (3) with a hollow structure for accommodating the diaphragm and the driver unit. The enclosure has an opening (39) at one surface, and the driver unit abuts against an end edge of the diaphragm so as to drive in the same direction as the plane direction of the diaphragm and is also fixedly mounted onto the enclosure.

Abstract: A method of unlocking an electronic lock capable of saving a labor by unmanning a system on the side of an object to be unlocked and increasing a security, comprising the step of unlocking by using a radio and a plurality of identification codes, wherein a cashbox (10) transmits ID=A as ID1, a first electronic lock device (20) transmits ID=B as ID2 when receiving ID=A as ID, a second electronic lock device (30) transmits ID=C as ID3 when receiving ID=B as ID, and the cashbox (10) performs an unlocking operation when receiving ID=C as ID.

Abstract: A method of unlocking an electronic lock capable of saving a labor by unmanning a system on the side of an object to be unlocked and increasing a security, comprising the step of unlocking by using a radio and a plurality of identification codes, wherein a cashbox (10) transmits ID=A as ID1, a first electronic lock device (20) transmits ID=B as ID2 when receiving ID=A as ID, a second electronic lock device (30) transmits ID=C as ID3 when receiving ID=B as ID, and the cashbox (10) performs an unlocking operation when receiving ID=C as ID.