Snap button with pull-apart resisting structure

Abstract

A snap button with pull-apart resisting structure includes a male and a female part. The male part is provided on a bottom surface with a raised portion, and a connecting head having a neck portion centered at and projected from the raised portion. A recess portion is provided on one side of the raised portion to create a difference in the distances from an end surface of the connecting head to the raised portion and to the recess portion. The female part includes a central through hole, a part of which is a non-full circular hole enclosed by an elastic frame and having a diameter slightly smaller than that of the connecting head on the male part, and the other part of the central through hole is an extended curved hole corresponding to the recess portion on the male part and enclosed by a raised frame of a predetermined height.

1 . A snap button with pull-apart resisting structure, comprising a male part and a female part; 
 said male part being provided on a bottom surface within a predetermined area with a raised portion, and at a central area with a connecting head that projects from said raised portion and is formed at a root portion with a narrowed neck portion; an area of the bottom surface of said male part extended from an edge of said male part to a line in parallel with that edge and transversely passing through a center of said narrowed neck portion of said connecting head forming a recess portion in said raised portion, so that there is a difference between a height from an end surface of said connecting head to said raised portion and a height from the end surface of said connecting head to said recess portion; and    said female part being provided on a top surface with a raised portion that has an overall area slightly smaller than that of said female part, and at a central area with a through hole having predetermined size and shape; a part of said through hole being a non-full circular hole having a diameter slightly smaller than that of said connecting head on said male part and being enclosed in an elastic frame, and a groove being provided along an outer side of said elastic frame with a plurality of spaced supporting rods radially extended from an outer wall surface of said elastic frame to an inner wall surface of said groove; the other part of said central through hole being located at a position corresponding to said recess portion on said male part and in the form of an extended and curved hole with a raised frame of a predetermined height extended along said extended curved hole.    
   
   
       2 . The snap button with pull-apart resisting structure as claimed in  claim 1 , wherein said raised frame on said female part has a height larger than that of said elastic frame, and is movable in said recess portion on said male part.  
   
   
       3 . The snap button with pull-apart resisting structure as claimed in  claim 1 , wherein said female part is provided on a bottom surface at a position corresponding to said raised frame with a shallow curved recess portion.