| 摘要 |
A transmission device capable of changing speed with stored energy drives a carriage to move back and forth. The transmission device includes a variable speed transmission mechanism mounted on a base and driven by a motor. A first energy storage mechanism mounted on the variable speed transmission mechanism cooperates with a first latch mechanism mounted on the base so as to store and release the energy of the driven carriage, switch the output of the variable speed transmission mechanism, and thus switch the moving speed of the carriage.
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