Spa bath pool music reproduction equipment with automatic lifting and lowering mechanism for loud speakers, has electric motor connected to rack gear, which moves in opposite directions according to on and off states of power supply

摘要

A casing buried in an installation site, comprises an upper opening, and accommodates a rack gear and a piston supporting the loud speaker. An electric motor connected to the rack gear, moves in opposite directions according to ON and OFF states of power supply, so as to raise and lower the loudspeaker, respectively.