Fitment combination unit with automatic contraction and expansion functions

The utility model discloses a fitment combination unit with automatic contraction and expansion functions. The fitment combination unit comprises an upper coil, a lower coil, coil insulation shells, an upper top cover, a lower top cover, conductors and an outer coating body. The winding directions of the upper coil and the lower coil are opposite and the upper coil and the lower coil are coated with the coil insulation shells respectively. The upper coil and the upper top cover are connected, the lower coil and the lower top cover are connected, the upper coil and the lower coil are connected with an external power source through the conductors, and the outer coating body is made of a flexible material. The size of the fitment combination unit is greatly changed when the unit is used and is not used, so that the possibility for saving storage space is high; meanwhile, due to the fact that the shape of the unit can be changed and the unit can be combined at will, convenience is provided for meeting different requirements of people.