| 摘要 |
A lawn mower includes a blade support with a recess formed in the bottom side thereof and an outlet portion. A blade is mounted rotatably within the recess. A grass collecting unit has an inlet portion communicated with the outlet portion of the recess so as to collect grass that was cut from a lawn with the use of the blade. Several ventilation holes are formed through a wall of the grass collecting unit so as to reduce air pressure inside the grass collecting unit. The grass collecting unit has a positioning hole formed through the top wall thereof. A grass indicating unit includes a body member disposed in the positioning hole and capable of being pushed upward relative to the top wall of the grass collecting unit by virtue of air pressure inside the grass collecting unit, and a positioning assembly mounted securely on the body member so as to prevent removal of the body member from the top wall of the grass collecting unit. Accordingly, when grass within the grass collecting unit clogs the ventilation holes, the air pressure within the grass collecting unit is increased so as to push upward and protrude the body member from the top wall of the grass collecting unit so as to indicate to the user when adjustment of the amount of the collected grass within the grass collecting unit is required.
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