Bijouterie and/or jewelry item

Abstract

A bijouterie and/or jewelry item, comprises a hollow male part and a hollow female part interacting with each other, in which the male part comprises: a first ornamental part, having a first inner surface and a first outer ornamental surface, a male coupling part, integral with said inner surface and having an outer coupling surface, the female part comprises: a second ornamental part, comprising a second inner surface and a second outer ornamental surface, a female coupling part, integral with said second inner surface and comprising an inner coupling surface shaped to interact with said outer coupling surface.

1 . A bijouterie and/or jewelry item, comprising a-male part and a hollow female part ( 5 ) capable of interacting with said male part, wherein:
 the male part comprises:
 a first ornamental part, having a first inner surface and a first outer ornamental surface, 
 a male coupling part, secured to the inner surface of the first ornamental part and axially offset along a longitudinal axis of the male part, said male coupling part comprising an outer coupling surface, 
   the female part comprises:
 a second ornamental part, comprising a second inner surface and a second outer ornamental surface, 
 a female coupling part, secured to the second inner surface of the second ornamental part, comprising an inner coupling surface configured to interact with the outer coupling surface of the male coupling part of the male part, 
   said bijouterie and/or jewelry wherein:   the outer coupling surface of the male coupling part is defined by a surface connecting:
 a base, obtained by an ellipse defined by a half small axis A2 and by a half large axis A1, said base being contained in a first plane P1, and 
 an apex, obtained by an ellipse defined by a half small axis B2 and by a half large axis B1, said apex being contained in a second plane P2, axially shifted along the longitudinal axis of the male part, outwards from the first ornamental part of the male part ( 3 ), 
   the inner coupling surface of the female coupling part is defined by a surface, connecting:
 a base, obtained by an ellipse defined by a half small axis D2 and by a half large axis D1, said base being contained in a third plane P3, and 
 an apex, obtained by an ellipse defined by a half small axis C2 and by a half large axis C1, said apex being contained in a fourth plane P4 axially shifted along a longitudinal axis of the female part, towards the outside from the second ornamental part of the female part, 
   A1, A2, B1, B2, C1, C2, D1 and D2 being selected such that the following relationships are defined:   A1>A2, B1>B2, A1<B1 and A2=B2,   C1>C2, D1>D2, C2<D2 and C1=D1,   B1<C1, B2<C2, B1>D2 and A1>C2.   
     
     
         2 . The item according to  claim 1 , wherein the outer coupling surface of the male coupling part and the inner coupling surface of the female coupling part are smooth and threadless. 
     
     
         3 . The item according to  claim 1 , wherein the height of the outer coupling surface of the male coupling part and the height of the inner coupling surface of the female coupling part are sized to provide a snug fit between the base of the outer coupling surface of the male coupling part and the top of the inner coupling surface of the female coupling part when the male part and the female part are coupled. 
     
     
         4 . The item according to  claim 1 , wherein the first ornamental part of the male part has a shoulder lying in the plane P1 of the base of the outer coupling surface of the male coupling part, said shoulder extending radially outward from said outer coupling surface. 
     
     
         5 . The item according to  claim 1 , wherein the second ornamental part of the female part has a shoulder lying in the plane P3 of the base of the inner coupling surface of the female coupling part, said shoulder extending radially inward from said inner coupling surface. 
     
     
         6 . The item according to  claim 1 , wherein the first ornamental part and the male coupling part are concentric. 
     
     
         7 . The item according to  claim 1 , wherein the second ornamental part and the female coupling part are concentric. 
     
     
         8 . The item according to  claim 1 , wherein the male coupling part of the male part is hollow and has an inner surface of circular cross-section. 
     
     
         9 . The item according to  claim 8 , wherein the male and female parts are rings. 
     
     
         10 . A method of assembling a jewelry and/or jewelry item according to  claim 1 , comprising the steps:
 position the outer coupling surface of the male coupling part in the inner coupling surface of the female coupling part, or vice versa, so that the half large axis B1 is opposite the half large axis C1, then   move the male part towards the female part, or vice versa, until the first plane P1 coincides with the fourth plane P4 and the second plane P2 coincides with the third plane P3, then   rotate the male part and the female part around their longitudinal axis.