Fastening element for costume jewellery and/or jewellery items

1) A fastening and/or connection device (10;

• 110, 210) for a jewellery and/or costume jewellery item (B), said item (B) comprising a first free end (B1) and a second free end (B2) to be joined, said device (10;
• 110;
• 210) comprising a first portion (20;
• 120) suited to be connected to said first free end (B1) of said item (B) and a second portion (30;
• 130) suited to be connected to said second free end (B2) of said item (B), wherein said device (10;
• 110;
• 210) comprises:
• a main body (40;
• 140) suited to be interposed between said first portion (20;
• 120) and said second portion (30;
• 130);
• first connection means (50;
• 150;
• 250) suited to place said main body (40;
• 140) and said first portion (20;
• 120) in a disengaged operating configuration or in an engaged operating configuration;
• second connection means (60;
• 160) suited to place said main body (40;
• 140) and said second portion (30;
• 130) in a disengaged operating configuration or in an engaged operating configuration;
• wherein, in order to join said free ends (B1, B2) of said item (B), said first connection means (50;
• 150;
• 250) and said second connection means (60;
• 160) interact in such a way that said main body (40;
• 140) and said second portion (30;
• 130) are placed in said engaged operating configuration through said second connection means (60;
• 160) only once said main body (40;
• 140) and said first portion (20;
• 120) have been placed in said engaged operating configuration through said first connection means (50;
• 150;
• 250);
• and wherein, in order to separate said free ends (B1, B2) of said item (B), said first connection means (50;
• 150;
• 250) and said second connection means (60;
• 160) interact in such a way that said main body (40;
• 140) and said first portion (20;
• 120) are placed in said disengaged operating configuration through said first connection means (50;
• 150;
• 250) only once said main body (40;
• 140) and said second portion (30;
• 130) have been placed in said disengaged operating configuration by said second connection means (60;
• 160).