Patent ID: 8087409

Claim:
A heater for footwear comprising: a seat having a space centrally defined therein, a spring compressively received in the space in the seat; a friction mechanism received in the seat, the friction mechanism including: a disk fixed in the seat, the disk having a hole defined therein and extending therethrough; an upper rotor rotatably mounted on a top of the disk; and a lower rotor rotatably mounted on a bottom of the disk; and a cap sleeved on the seat, the cap having a driving unit longitudinally extending therefrom, the driving unit extending through the upper rotor, the disk, and the lower rotor for movably abutting against the spring received in the space in the seat; wherein the heater is adapted to be mounted in the footwear; when the cap is pressed, the spring is compressed and the driving unit is downwardly moved relative to the seat, the upper rotor and the lower rotor are engaged by the driving unit to be rotated for rubbing the disk; when the cap is released, the spring is released and the driving unit is upwardly moved relative to the seat, the upper rotor and the lower rotor are engaged by the driving unit to be rotated for rubbing the disk; heat is created by frictions due to the upper rotor and the lower rotor respectively continuously rubbing the disk for warming the footwear.