Hair extension provided with cross-shaped engaging portion

Abstract

A hair extension includes cross-shaped engaging portions, pillar portions connected to the cross-shaped engaging portions, a bottom portion having opposite side surfaces. The pillar portions are connected to one surface of the opposite side surfaces of the bottom portion. The hair extension further includes a support portion fixed to the other surface of the opposite side surfaces of the bottom portion, a wig hair fixing portion connected to the support portion, and wig hairs fixed to the wig hair fixing portion.

What is claimed is: 
     
         1 . A hair extension comprising:
 cross-shaped engaging portions;   pillar portions connected to the cross-shaped engaging portions;   a bottom portion having opposite surfaces, the pillar portions connected to one of the opposite surfaces of the bottom portion;   a support portion fixed to the other of the opposite surfaces of the bottom portion;   a wig hair fixing portion connected to the support portion; and   wig hairs fixed to the wig hair fixing portion.   
     
     
         2 . The hair extension of  claim 1 , wherein the cross-shaped engaging portions are formed in a direction intersecting with the bottom portion and disposed at regular intervals on the bottom portion. 
     
     
         3 . The hair extension of  claim 1 , wherein each of the pillar portions includes four side protrusions defining a cross-shaped cross section, and each of the cross-shaped engaging portions includes hook portions transformed from the side protrusions by melting a part of each of the pillar portions. 
     
     
         4 . The hair extension of  claim 1 , further comprising:
 a bottom fixing portion fixed to the other surface of the bottom portion and made of a material capable of allowing the wig hair fixing portion to be attached to and detached from the bottom fixing portion.   
     
     
         5 . The hair extension of  claim 4 , wherein the wig hair fixing portion is an injection-molded Velcro tape having hooks, and the bottom fixing portion is formed of a fabric capable of allowing the injection-molded Velcro tape to be attached to and detached from the fabric. 
     
     
         6 . The hair extension of  claim 1 , wherein the support portion has a length corresponding to a length of the bottom portion and a width smaller than a width of the bottom portion, and is formed, in a flat shape, of a plastic material having flexibility so that the support portion is bent and maintains a bent shape when a force is applied thereto. 
     
     
         7 . The hair extension of  claim 6 , wherein the support portion includes a plurality of support portions disposed in a spaced-apart parallel relationship with each other. 
     
     
         8 . The hair extension of  claim 1 , wherein the wig hairs are bonded to one surface of the wig hair fixing portion by a bonding tape or a bonding agent or fixed to the bottom portion by sewing. 
     
     
         9 . The hair extension of  claim 1 , wherein a height of the pillar portions positioned in a peripheral region of the bottom portion is smaller than a height of the pillar portions positioned in a central region of the bottom portion. 
     
     
         10 . The hair extension of  claim 9 , wherein a height of an attachment portion including the cross-shaped engaging portions, the pillar portions and the bottom portion is set such that the height of the attachment portion positioned in the central region of the bottom portion is 1.8 mm to 1.9 mm and the height of the attachment portion positioned in the peripheral region of the bottom portion is 1.6 mm to 1.7 mm. 
     
     
         11 . A hair extension comprising:
 a net;   an attachment portion connected to at least a part of one surface of the net; and   wig hairs provided on the other surface of the net and configured to cover at least a part of a top of a head or a parting of a wearer,   wherein the attachment portion is provided at a predetermined width along a periphery or an overall length of the net, the attachment portion including:   cross-shaped engaging portions;   pillar portions connected to the cross-shaped engaging portions; and   a bottom portion having opposite surfaces, one surface being connected to the pillar portions and the other surface being connected to the net.   
     
     
         12 . The hair extension of  claim 11 , wherein the cross-shaped engaging portions are formed in a direction intersecting with the bottom portion and disposed at regular intervals on the bottom portion. 
     
     
         13 . The hair extension of  claim 11 , wherein each of the pillar portions includes four side protrusions defining a cross-shaped cross section, and each of the cross-shaped engaging portions includes hook portions transformed from the side protrusions by melting a part of each of the pillar portions. 
     
     
         14 . The hair extension of  claim 11 , further comprising:
 a support portion fixed to the other surface of the bottom portion,   wherein the support portion has a length corresponding to a length of the bottom portion and a width smaller than a width of the bottom portion, and is formed, in a flat shape, of a plastic material having flexibility so that the support portion is bent and maintains a bent shape when a force is applied thereto.   
     
     
         15 . The hair extension of  claim 11 , wherein when the hair extension is attached around the parting, a width of at least one of the net and the attachment portion is 5.5 cm to 6.5 cm. 
     
     
         16 . The hair extension of  claim 11 , wherein when the hair extension is attached to the top of the head, at least one of the net and the attachment portion is formed in a circular shape to have a diameter of 3.5 cm to 4.5 cm. 
     
     
         17 . The hair extension of  claim 11 , wherein a height of the pillar portions positioned in a peripheral region of the bottom portion is smaller than a height of the pillar portions positioned in a central region of the bottom portion. 
     
     
         18 . The hair extension of  claim 17 , wherein a height of the attachment portion positioned in the central region of the bottom portion is 1.8 mm to 1.9 mm and a height of the attachment portion positioned in the peripheral region of the bottom portion is 1.6 mm to 1.7 mm.