Abstract: A music timer comprises a timing unit, a music box unit and its mounting frame, a music control wheel (29) that has a gap (291) along its edge is driven to rotate by a driving gear through rotary axis of the driving spring of the timing unit; one end (3a) of a brake rod (3) always abuts against the edge of said music control wheel (29) and the other end (3b) extends into the damping mechanism of the music box unit to activate it when the end (3a) abuts against the non-gap places on said music control wheel, whereas when the end (3a) sinks into the gap (291) of said music control wheel, the end (3b) then departs from the damping mechanism of the music box unit, thus producing no influence on its movement. The present invention enables the timer to produce pleasant and lasting music at the end of the timing. Moreover, through the scientific spatial arrangement of the present invention, and the projected cross section of the device is much smaller than the sum of those of the timer and the music box unit.

Abstract: A power external output mechanism in muic box comprising a music drum in which a power external output shaft (4) is inserted thereto and integrated with each other in the axial and rotary directions, wherein an engaging means is provided in a drum body (1) of muxic box, by which the drum and the external output shaft are engaged with each other so as to prevent the external output shaft to be break away therefrom, said engaging means is an elastic leg abuttal (5) with a type of thin wall which is formed on an external end plate (2) of the drum and extended inward in aixal direction of the shaft. An inner flange (10) formed on a free end of the leg abuttal (5) and an inner cave annular groove (11) formed on the peripheral surface of the shaft (4) are engaged with each other to form an interlock in axial drection. The inner end plate (3) and an end (9) of the external output shaft (4) are fitted with each other to form a connection in the direction of rotation.