US Patent 7676894 Clasp for jewelry, especially for necklaces and bracelets

The invention describes a clasp for jewelry, especially for necklaces and bracelets, comprising a push-in fastener element, a receptacle element for receiving the push-in fastener element, a latching mechanism by means of which the push-in fastener element can be latched in the receptacle element, the latching mechanism comprising a spreadable latching means which when spread comes into a form-locking engagement with the receptacle element, and a handling means that can be gripped from outside of the receptacle element, for operation of the latching mechanism.