US Patent 11419372 Clothing back buckle, bra connector and bra

A clothing back buckle, includes an inner lining cloth, a plurality of fasteners provided on a surface of the inner lining cloth, and an outer sleeve bag sleeved outside the inner lining cloth. The outer sleeve bag is a cylindrical cloth bag with one end open, and first slits corresponding to the fastener and for the fastener to go through are provided on the outer sleeve bag. The clothing back buckle adopts the outer sleeve bag to sleeve outside the inner lining cloth so that the outer sleeve bag completely covers the inner lining cloth. No sharp fracture or firm feel exists on the left and right sides of the clothing back buckle since no sewing seam is provided, the user thus feels more comfortable and harmonious when wearing the bra.