US 9,808,053 B2
Magnetic clasp for jewelry
Antonio Jakubowski, Pforzheim (DE)
Assigned to Vilmas GmbH, Pforzheim (DE)
Filed by VILMAS GmbH, Pforzheim (DE)
Filed on Nov. 8, 2016, as Appl. No. 15/346,635.
Application 15/346,635 is a continuation of application No. PCT/EP2015/059798, filed on May 5, 2015.
Claims priority of application No. 10 2014 106 699 (DE), filed on May 13, 2014.
Prior Publication US 2017/0049194 A1, Feb. 23, 2017
Int. Cl. A44C 5/20 (2006.01)
CPC A44C 5/2085 (2013.01) [A44C 5/2071 (2013.01); A44D 2203/00 (2013.01); Y10T 24/32 (2015.01)] 11 Claims
OG exemplary drawing
 
1. A magnetic clasp for jewelry, said magnetic clasp comprising:
a first and a second coupling part each having a magnet and an abutment surface;
wherein the abutment surfaces of the first and second coupling parts are pulled against one another by a magnetic force of attraction when the clasp is closed;
wherein the first and second coupling parts each have a fastening element for fastening to the jewelry and, when the clasp is closed, the fastening elements define a pulling direction of the clasp;
wherein the first coupling part has walls which rise upwardly on opposite sides of the abutment surface of the first coupling part and define a receptacle in which the second coupling part engages when the clasp is closed;
wherein the second coupling part has an undercut which, together with the receptacle of the first coupling part, forms an interlock acting against the pulling direction;
wherein the abutment surfaces are arranged at an incline to the pulling direction and the first coupling part forms a sliding surface which, when the clasp is closed and pressure acts on the second coupling part in a direction opposite to the pulling direction, allows a displacement of the second coupling part relative to the first coupling part, thus opening the clasp; and
wherein the first coupling part has an opening arranged opposite the fastening element of said first coupling part and between the walls rising on the opposite sides of the abutment surface, wherein the opening, when the clasp is closed, is filled by the second coupling part and widens upwardly.