| 摘要 |
An electric carrier with a motor controlled by correlative positions includes an operator possible to be a person, a sensor controlled by the operator and having a position reference member driven by and moving together with the operator and a sensing body producing signal at any movement of the position reference member, a spring connected to the position reference member and disfigured by the operator's driving so that the position reference member may return to its position and transmit force to an electric carrier to be mentioned below, a controller operating by signal coming from the sensing body, a motor driven by the controller and accordingly having functions of speed increasing and decreasing clockwise and counterclockwise rotation, and the electric carrier moved by the motor and with the operator synchronously. When the operator changes its position relative to the electric carrier, the sensor sends signal to the controller, which then controls the electric carrier change its speed to the same speed of the operator.
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