Press-stud

Abstract

A press-stud comprises a female element having a seat in which is accommodated a resiliently deformable anchoring member ( 22 ) which is to anchor a male element in a closed configuration of the stud. The anchoring member is a ring having a flattened cross-section with an inner edge ( 24 ) on which are defined substantially freely bending arcuate lips ( 29 ) which project in a cantilevered manner from a support wall of the female element ( 10 ) by not more than one third of the width of the flattened cross-section of the anchoring ring ( 22 ). Preferably, the press-stud has an overall height, in the closed configuration, which does not exceed 2.5 mm, and a ratio between the diameter and the height which is greater than 3.5.

1 . A press-stud, comprising a female element having a seat for accommodating a resiliently deformable anchoring member which is to anchor a male element in a closed configuration of the stud, wherein the anchoring member is a ring having a flattened cross-section ( 22 ,  72 ) with an inner edge ( 24 ,  74 ) on which are defined substantially freely bending arcuate lips ( 29 ) which project in a cantilevered manner from a support wall ( 18 ,  68 ) of the female element ( 10 ,  60 ) by not more than one third of the width of the flattened cross-section of the anchoring ring ( 22 ,  72 ). 
     
     
         2 . A press-stud according to  claim 1 , wherein the lips are defined by notches ( 28 ,  78 ) having a width much smaller than the length of the circumference of the inner edge ( 24 ,  74 ) of the flattened ring. 
     
     
         3 . A press-stud according to  claim 2 , wherein the depth of the notches ( 28 ,  78 ) is substantially equal to the cantilevered projection of the lips ( 29 ) from the support wall ( 18 ,  68 ). 
     
     
         4 . A press-stud according to  claim 2 , wherein the notches ( 28 ,  78 ) are substantially U-shaped. 
     
     
         5 . A press-stud according to  claim 2 , comprising at least three notches ( 28 ,  78 ). 
     
     
         6 . A press-stud according to  claim 2 , wherein the notches ( 28 ,  78 ) are equidistant along the circumference of the inner edge ( 24 ,  74 ) of the flattened ring. 
     
     
         7 . A press-stud according to  claim 1 , wherein the anchoring ring ( 22 ,  72 ) is held in the female element by an annular covering strip ( 30 ,  80 ). 
     
     
         8 . A press-stud according to  claim 1 , having an overall height in an axial direction (Z-Z) of insertion of the male element ( 40 ) into the female element ( 10 ,  60 ), in the closed configuration, which does not exceed 2.5 mm. 
     
     
         9 . A press-stud according to  claim 1 , wherein the ratio between the diameter and the height in an axial direction (Z-Z) of insertion of the male element ( 40 ) into the female element ( 10 ,  60 ), in the closed configuration, is greater than 3.5.