| 摘要 |
A combined manual and motorized adjustment drive for adjusting the string tension of a stringed instrument, in particular a guitar, having a tuning peg (5) for winding and unwinding a string running thereon, a drive motor (9), in particular an electric motor, a force-transmitting member for transmitting a drive force generated by the drive motor (9) to the tuning peg (5) for rotating the latter and an adjustment element (24, 25, 26), which must be operated manually, and which couples with the force-transmitting member for manual adjustability of the rotary position of the tuning peg (5), wherein said adjustment drive is improved in that in allows a compact design in addition to reliable self-retention and good adjustability of the manual drive. According to the invention, the force-transmitting member is an at least three-stage reduction gear (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23), having a first gear stage (11), on which the drive motor (9) acts with an output shaft and a last gear stage (22, 23), which acts on the tuning peg (5) in order to rotate the latter, and the adjustment element (24, 25, 26) acts on a gear stage (17, 18) of the reduction gear (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23) between the first (11) and the last (22, 23) gear stages to introduce the force.
|
