| 摘要 |
PROBLEM TO BE SOLVED: To achieve stable travel in a simple structure in a power-assisted dolly. SOLUTION: A handle 26 and a continuously variable transmission of a motor are connected to each other by a rod 44, and as the handle 26 is operated to be pulled forward, the motor is gradually boosted. A gas spring 40 is installed between a second rotary plate 48 provided on a handle shaft 25 to protrude and the front wall 10A side of a main body 10, the gas spring 40 has a shock absorbing function, and as pushing or pulling speed to the rod 44 is larger, larger resistance is generated. When the handle 26 is at a neutral position, a connected position of a tip of the rod 44 falls on a position at a specified angle (x) down from a horizontal line X passing an axial center of the handle shaft 25. The handle 26 is fixed without swinging because of the shock absorbing function of the gas spring 40, and traveling is stabilized. As pulling to the handle 26 goes from start to end, larger operation force is required, so the handle 26 becomes gradually heavier as we call it, thereby operation feeling to the handle 26 is favorable.
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