Fastening device for jewellery

Abstract

Described is a fastening device for jewellery comprising a first element and a second element which can be fixed to respective ends of jewellery, wherein the first element has a top surface and a bottom surface, in which a socket is formed; the second element has a top surface, a bottom surface and a head, configured to interlock in a complementary way with the socket, so as to reversibly couple the first element with the second element; the second element comprises a groove, formed on its top surface, in which a sliding slider is housed, the first element comprises a recess, in a position adjacent to the socket, delimited by its top surface, so that, when the head is inserted in the socket, the slider remains in contact with the top surface of the first element at the recess, preventing the head from disengaging the socket and the second element from separating from the first element.

1 . Fastening device ( 1 ) for jewels comprising
 a first element ( 10 ) and a second element ( 20 ), connectable to respective ends of a jewel, wherein   the first element ( 10 ) includes   a top surface ( 110 ), and a bottom surface ( 120 ) provided with a socket ( 101 ),   the second element ( 20 ) includes   a top surface ( 210 ), a bottom surface ( 220 ) and a head ( 201 ), suitable to complementarily fit said socket ( 101 ), so as to reversibly join the first element ( 10 ) and the second element ( 20 ),   characterized in that   said second element ( 20 ) comprises   a groove ( 240 ), carved on its top surface ( 210 ), in which   a slider ( 40 ) is housed,   and in that   said first element ( 10 ) comprises   a recess ( 102 ), adjacent to said recess ( 101 ) and delimited by the top surface ( 110 ), so that   when the head ( 201 ) is inserted in the socket ( 101 ), the slider ( 40 ) reaches the mechanic stop with the top surface ( 110 ) of the first element ( 10 ) in correspondence with the recess ( 102 ), preventing the head ( 201 ) to disengage the socket ( 101 ) and the second element ( 20 ) to disjoin the first element ( 10 ).   
     
     
         2 . Fastening device ( 1 ) according to  claim 1 , characterized in comprising
 an elastic means ( 60 ), and in that   said groove ( 240 ) has a closed end ( 203 ) opposed to said first element ( 10 ), wherein   the elastic means ( 60 ) is placed in said groove ( 240 ) between the slider ( 40 ) and said closed end ( 203 ), so that the slider ( 40 ) reaches the mechanic stop with the top surface ( 110 ) of the first element ( 10 ) when the device ( 1 ) is fastened.   
     
     
         3 . Fastening device ( 1 ) according to  claim 1  or  2 , characterized in that
 said socket ( 101 ) and said head ( 201 ) are tapered in a direction going from the top surface ( 110 ) to the bottom surface ( 210 ) of said first ( 10 ) and/or second element ( 20 ). 
 
     
     
         4 . Fastening device ( 1 ) according to  claim 1 , characterized in comprising
 an external casing ( 30 ) for containment having a U shape and covering the first element ( 10 ), the second element ( 20 ) and the slider ( 40 ).   
     
     
         5 . Fastening device ( 1 ) according to  claim 1 , characterized in that
 said casing ( 30 ) is integrated with said slider ( 40 ), so that a displacement of the casing ( 30 ) elicited by an external force causes the sliding of the slider ( 40 ) in the groove ( 40 ).   
     
     
         6 . Fastening device ( 1 ) according to  claim 4 , characterized in that
 a guide ( 401 ) is built in said slider ( 40 ), a pin ( 50 ) integrated to the second element ( 20 ) being housed in said guide ( 401 ), so that an horizontal displacement of the casing ( 30 ) causes the sliding of the slider ( 40 ) in the groove ( 240 ).   
     
     
         7 . Fastening device ( 1 ) according to  claim 1 , characterized in that
 the joining between said socket ( 101 ) and said head ( 201 ) is a swallow tail-like joint.   
     
     
         8 . Fastening device ( 1 ) according to  claim 1 , characterized in that
 the recess ( 102 ) is delimited by the bottom surface ( 120 ) and by the top surface ( 110 ) of the first element ( 10 ).