| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor brush having improved cushioning characteristics without a reduction in movement characteristics. SOLUTION: A shaft 51 is rotatably supported by a case body 21, a part of a travel wheel 52 is positioned around the shaft 51, and coiled springs 53 for pressing the travel wheel 52 against the shaft 51 are provided between the shaft 51 and the travel wheel 52. When the travel wheel 52 collides with an obstacle, the travel wheel 52 absorbs the impact by moving relative to the shaft 51 and a case body 21 while being pressed by a coiled spring 53. Cushioning characteristics can be improved by, for example, making the travel wheel 52 softer or increasing the thickness of the travel wheel, and the improvement can be achieved without a reduction in movement characteristics. COPYRIGHT: (C)2011,JPO&INPIT |
