| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique reasonably switching the blade-driving mode of a lawn mower between a both blade-driving mode and a single blade-driving mode. SOLUTION: This lawn mower has a driving mode-switching member 157 for switching a driving mode between a both blade-driving mode for driving an upper blade 152 and a lower blade 153 and a single blade-driving mode for driving the upper blade and inhibiting the driving of the lower blade. When the driving mode-switching member 157 is placed on the lower side of a base plate 154, the mounting height position with respect to the blade-mounting portion of a blade assembly is switched to an upper position. Thus, the engagement state of an upper blade-driving member 133 with the upper blade and the engagement state of a lower blade-driving member 135 with the lower blade are maintained, respectively, and the upper blade and the lower blade can be driven. When the driving mode-switching member 157 is placed on the upper side of the base plate 154, the mounting vertical height position with respect to the blade-mounting portion of the blade assembly is switched to a lower position to maintain the engagement state of the upper blade-driving member 133 with the upper blade. Thus, the engagement state of the lower blade-driving member 135 with the lower blade is disengaged, and only the upper blade can be driven. COPYRIGHT: (C)2007,JPO&INPIT
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