Heat sole

Abstract

A heating sole includes an upper pad formed with a plurality of ventilation holes and configured to be fitted in any shoe, a heating sheet having an upper and a lower layer and a filament fitted between the upper and lower layers so that the filament is completely enclosed by the upper and lower layers thereby insulating the filament from outside, the filament being connected with a temperature sensor, the heating sheet being formed with a plurality of ventilation holes aligned with the ventilation holes of the upper pad, the temperature sensor being connected with an electrical cord provided with an electrical connector at an outer end thereof, the electrical connector being adapted to engage with a battery box in which there is a rechargeable battery, a lower pad integrally made of foam rubber and formed with a raised edge at a rear portion thereof, the raised edge having a notch for passage of the electrical cord, the lower pad being formed with a plurality of ventilation holes aligned with the ventilation holes of the heating sheet and the upper pad, whereby the heating sole can automatically keep a wearer's foot at a constant temperature.

I claim:  
     
         1 . A heating sole comprising: 
 an upper pad formed with a plurality of ventilation holes and configured to be fitted in any shoe;    a heating sheet having an upper and a lower layer and a filament fitted between said upper and lower layers so that said filament is completely enclosed by said upper and lower layers thereby insulating said filament from outside, said filament being connected with a temperature sensor, said heating sheet being formed with a plurality of ventilation holes aligned with said ventilation holes of said upper pad, said temperature sensor being connected with an electrical cord provided with an electrical connector at an outer end thereof, said electrical connector being adapted to engage with a battery box in which there is a rechargeable battery;    a lower pad integrally made of foam rubber and formed with a raised edge at a rear portion thereof, said raised edge having a notch for passage of said electrical cord, said lower pad being formed with a plurality of ventilation holes aligned with said ventilation holes of said heating sheet and said upper pad;    whereby said heating sole can automatically keep a wearer's foot at a constant temperature.    
     
     
         2 . The heating sole as claimed in  claim 1 , wherein said temperature sensor is composed of two metal members which will contact with each other when temperature is below a predetermined value, but will separate from each other when temperature is above a predetermined value.  
     
     
         3 . The heating sole as claimed in  claim 1 , wherein said battery box is provided with a switch for controlling connection of said battery to said filament and a clip for mounting said battery box on a sock via an adhesive band.