Patent ID: 7880581

Claim:
A PTC thermistor comprising: plural PTC thermal resistance members respectively having a central portion formed with beehive holes; two electric conducting plates with electric conductively respectively connected with different electrodes, said PTC thermal resistance members clamped between said two electric conducting plates, said two electric conducting plates having their surfaces bored with plural openings at locations respectively corresponding with those of each said PTC thermal resistance member; two outer insulating plates made of insulating and heat-resisting material, said two outer insulating plates respectively positioned at an outer side of said two electric conducting plates, said two outer insulating plates having their surfaces respectively disposed with openings at locations respectively matching with those of each said PTC thermal resistance member; and plural locking members employed to be inserted through said two outer insulating plates to lock them together for tightly combining foresaid components; and characterized by an intermediate insulating plate having insulating and heat-resisting property and positioned between said two electric conducting plates, said intermediate insulating plate having its surface bored with openings at locations respectively aligned to those of each said PTC thermal resistance member for said PTC thermal resistance member to be inserted therein.