| 摘要 |
A simplified sound reproducing device having external output shafts disposed beneath the plane of rotation of the record disc at positions corresponding to the end point of sound reproduction of each record groove and which actuate predetermined external components corresponding to the record groove's recorded content previously reproduced. A transmission selectively connects a center pin to each of the external output shafts. This transmission includes a driving wheel fixed around the center pin, a revolvable bearing frame member carrying a planetary shaft and capable of rotation together with the center pin when engaged with a coupling member, a planetary gear wheel supported by the planetary shaft capable of rotational and axial movement; and pair of guide members allowing said planetary wheel to mesh with the driving wheel and fixedly disposed to the center pin, one at a position axially in front of and the other axially behind the driving wheel to hold the planetary wheel from both sides and to urge it to move axially with the driving wheel, driven wheels fixedly coupled to the external output shafts capable of meshing with the planetary wheel when the driving wheel and the planetary wheel are in an advanced position, and out of engagement with the planetary wheel, when the driving wheel and the planetary wheel are in a retracted position. The coupling member is constructed such that the revolvable bearing frame member can be stopped, regardless of the rotation of the center pin, when the center pin is in an advanced position. |
