| 摘要 |
A gravitational animal trap comprises a trap cage having a movable door, an upturned plate that can be adjusted in terms of different fulcrums thereof, and a sensing device that is pivotally jointed with the upturned plate to activate the door switch. When the prey enters the trap cage and steps on the upturned plate, causing the upturned plate to alter the state of equilibrium due to the gravitational force of the prey, the sensing device is activated to shut the movable door, thus achieving the object of entrapping the prey. A weight-adjusting balance device can be further installed with the present invention to effectively improve upon the sensitivity and timing for the shutting of the movable door of the gravitational animal trap.
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