How does a mouse trap work? - briefly
A mouse trap employs a spring‑loaded bar that snaps shut the moment a bait‑trigger releases a latch, instantly killing or restraining the rodent. The action derives from stored mechanical energy released by a tensioned spring or torsion coil.
How does a mouse trap work? - in detail
A conventional snap‑type trap relies on stored potential energy in a coiled spring. The spring is compressed when the user pulls back the metal bar (the strike arm) and secures it in a ready position using a small latch. The latch holds the bar under tension until a mouse disturbs the bait platform. The platform is connected to a sensitive trigger mechanism—usually a thin wire or a hinged lever—that releases the latch when a slight upward force is applied.
When the latch releases, the spring expands rapidly, driving the strike arm forward at high speed. The arm strikes the cage or base, closing the jaws around the rodent instantly. The kinetic energy generated by the spring is sufficient to break the mouse’s spine, ensuring a quick kill. After activation, the trap remains in the closed position until manually reset, preventing the spring from re‑charging unintentionally.
Key components and their functions:
- Spring: stores mechanical energy; determines force and speed of the snap.
- Strike arm: converts spring energy into rapid motion; contacts the cage to close it.
- Latch: holds the arm under tension; releases upon trigger activation.
- Trigger mechanism: sensitive element that detects the mouse’s presence; often a wire or lever attached to the bait platform.
- Bait platform: holds attractant; moves just enough to activate the trigger.
Variations of the basic design include:
- Live‑catch traps: replace the striking jaws with a hinged door that closes without harming the animal; the same spring‑loaded latch mechanism is used.
- Glue boards: employ a sticky surface; no spring or latch, but rely on adhesive to immobilize the rodent.
- Electronic traps: use a battery‑powered circuit that delivers a high‑voltage shock when the mouse contacts a sensor; the circuit replaces the mechanical spring‑strike system.
The effectiveness of any trap depends on precise calibration of the trigger sensitivity and spring tension. Too much tension can cause premature release; insufficient tension may fail to deliver enough force to kill. Proper placement of the bait, alignment of the trigger, and regular maintenance of the spring mechanism ensure reliable operation.