Fastener

Abstract

A fastener invertible between a states where comb teeth are closed or opened, that permits hairs to be easily inserted between the opened comb teeth and an inverting member, and more hairs to be inserted. The fastener includes an inverting member formed of an elastic plate and having, in an initial state that is not deformed, quadrilateral plane shape including two long side portions and two short side portions , and an apart region disposed between the long and short side portions or on a middle of the short side portion extending in a longitudinal direction of the short side portion, the inverting member having connection regions disposed on both sides of the apart region ; a connection portion connecting the connection regions that are superimposed each other by a deformation of the inverting member; and comb teeth fixed to one of the long side portions.

1 . A fastener comprising:
 an inverting member formed of an elastic plate shape member,   the inverting member having, in an initial state that is not deformed, a substantial quadrilateral plane shape composed of a pair of long side portions being opposed to each other and a pair of short side portions being opposed to each other, and an apart region being disposed between the long side portion and the short side portion or on a middle of the short side portion to extend in a longitudinal direction of the short side portion, the inverting member having connection regions respectively disposed on both sides of the apart region;   a connection portion that connects the connection regions that are superimposed each other by a deformation of the inverting member; and   a plurality of comb teeth whose one ends are fixed to one of the long side portions,   wherein   when, in the initial state, a length of the one of the long side portions is set to be W and a moving amount of the connection regions from the initial state to a superimposed state is set to be D, a relation of 0.15≤D/W≤0.17 is established.   
     
     
         2 . A fastener according to  claim 1 , wherein
 each of the comb teeth includes a head portion disposed on a free end of each of the comb teeth, and   each of the head portions is positioned in a region in which the other of the long side portions is disposed.   
     
     
         3 . A fastener according to  claim 1 , wherein
 each of the comb teeth includes a head portion disposed on a free end of each of the comb teeth,   at least a part of each of the head portions is positioned in an outward of the substantial quadrilateral plane shape, and   the other part of each of the comb teeth is positioned in a region of the substantial quadrilateral plane shape.   
     
     
         4 . A fastener according to  claim 2 , wherein a friction member is provided on the other of the long side portions. 
     
     
         5 . A fastener according to any one of  claim 1 , wherein
 in the initial state, the apart region is provided between the other of the long side portions and the short side portion, and   the connection region disposed on the other of the long side portions is arranged to be more apart from the one of the long side portions relative to a case in which a longitudinal direction of the other of the long side portions is parallel to a longitudinal direction of the one of the long side portions.   
     
     
         6 . A fastener according to  claim 5 , wherein, in the initial state, a central part of the other of the long side portions is formed to be curved in a direction to approach the one of the long side portions.