LAWN MOWER
First Claim
1. A lawn mower comprising:
- an electric motor;
a driving assembly coupled to and driven by said electric motor;
a blade assembly coupled to and driven rotatably by said driving assembly;
a battery for providing electricity to said motor;
a switch unit electrically connected to said electric motor and said battery and operable between an open circuit state, in which electrical connection between said electric motor and said battery is broken, and a closed circuit state, in which electrical connection between said electric motor and said battery is made; and
a detecting unit including a sampling resistor electrically connected in series with said battery, and a trigger circuit electrically connected in parallel with said sampling resistor and configured to control said switch unit according to detected voltage across said sampling resistor.
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Accused Products
Abstract
A lawn mower includes an electric motor, a driving assembly coupled to the electric motor, a blade assembly coupled to the driving assembly, a battery for providing electricity to the electric motor, a switch unit electrically connected to the electric motor and the battery, and a detecting unit. The detecting unit includes a sampling resistor electrically connected in series with the battery, and a trigger circuit electrically connected in parallel with the sampling resistor and configured to control the switch unit to make or break electrical connection between the electric motor and the battery according to detected voltage across the sampling resistor.
8 Citations
7 Claims
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1. A lawn mower comprising:
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an electric motor; a driving assembly coupled to and driven by said electric motor; a blade assembly coupled to and driven rotatably by said driving assembly; a battery for providing electricity to said motor; a switch unit electrically connected to said electric motor and said battery and operable between an open circuit state, in which electrical connection between said electric motor and said battery is broken, and a closed circuit state, in which electrical connection between said electric motor and said battery is made; and a detecting unit including a sampling resistor electrically connected in series with said battery, and a trigger circuit electrically connected in parallel with said sampling resistor and configured to control said switch unit according to detected voltage across said sampling resistor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification