Abstract: A car seat heater has an improved energy efficiency, which includes a heating wire which is coupled to a car seat and includes a metal-plated carbon fiber, a seat temperature sensor configured to detect temperature of the heating wire, and a variable temperature controller configured to control temperature of the heating wire according to a diameter of the metal-plated carbon fiber and a thickness of a plated metal thereof.

Abstract: Disclosed are a coupling and a clip for a coupling. The coupling may include a male connector having a holding groove, a female connector having a head portion for inserting the male connector, and a clip detachably coupled to the female connector and securing the male connector to the female connector. The female connector may include at least a slit and a coupling recess for inserting and seating the clip. The clip may include a band with elastically movable fore ends. The band may include at least a portion to serve as a locking portion, which is projected to an inside of the female connector through the at least a slit of the female connector and inserted in the holding groove of the male connector. One fore end of the band may form a hand grip and the other may serve as a rotation center when the hand grip is pulled outwards.