Extension Spring Toys
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An extension spring toy uses the mechanical energy stored in a stretched coil spring.
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🧸 Applications in Toys
Pull-back Cars
The spring stretches as the car is pulled backward.
When released, the stored energy in the spring propels the car forward.
Often combined with a simple gearbox for motion control.
Jumping Figures
A toy figure with legs attached to an extension spring can “jump” when the spring contracts.
The spring is compressed or pulled via a latch mechanism.
Flying Toys
In some launcher toys, pulling back the handle stretches the extension spring.
On release, it propels discs, foam darts, or mini planes.
Pop-up Mechanisms
Toys that suddenly “pop” open or eject parts after being pulled or wound.
Example: Jack-in-the-box uses a small extension spring to snap the lid open.