Jewelry clasp having two fastening parts and use of said jewelry clasp, bracelet, and kit

Abstract

The invention relates to a jewelry clasp, comprising two fastening parts, which each have, among other things, a permanent magnet. The invention further relates to the use of such a jewelry clasp as a safety closure and/or fastening system, to bracelet comprising such a jewelry clasp, and to a kit comprising at least two bracelets.

1 . A jewelry clasp having two fastening parts (A, B), each comprising a permanent magnet and a housing, wherein the housing has an opening and a rear side opposite the opening,
 wherein the housing comprises a cylindrical first area and a second area, wherein the second areas of the fastening parts (A, B) each comprises mutually complimentary barbs and holding devices and wherein the jewelry clasps may be opened and closed in a closing position wherein one barb of a fastening part (A or B) is introduced in the closing position into a holding device of the other fastening part (B or A), and the permanent magnets are in contact with one another.   
     
     
         2 . The jewelry clasp according to  claim 1 , wherein the second areas of the fastening parts (A, B) comprise sliding surfaces which form an angle α with an imaginary axis of opening and closing running centrally in the fastening parts (A, B). 
     
     
         3 . The jewelry clasp according to  claim 2 , wherein the angle α is greater than or equal to 25°. 
     
     
         4 . The jewelry clasp according to  claim 1 , wherein the housing comprises a first area with a closed exterior wall which is connected to the rear side of the fastening parts (A, B), and the barbs and holding devices form the second area of the fastening parts (A, B). 
     
     
         5 . The jewelry clasp according to  claim 1 , wherein the fastening parts (A, B) each have two barbs and holding devices. 
     
     
         6 . The jewelry clasp according to  claim 1 , wherein the permanent magnets are situated in the interior of the fastening parts (A, B). 
     
     
         7 . The jewelry clasp according to  claim 1 , wherein the permanent magnets have different lengths and/or are made of neodymium. 
     
     
         8 . (canceled) 
     
     
         9 . The jewelry clasp according to  claim 1 , wherein the fastening part (A) has a larger inside diameter than the other fastening part (B). 
     
     
         10 . The jewelry clasp according to  claim 1 , wherein a height of the fastening parts (A, B) is in the range of 9 to 11 mm, 9.95 to 10.05 mm, or is 10 mm, and the fastening parts (A, B) have an outside diameter of 4 to 8 mm, 5 to 7 mm, or 6 mm, and fastening part (A) has an inside diameter of 4 to 4.5 mm, or of 4.2 mm and fastening part (B) has an inside diameter of 3.8 to 4.1 mm, or of 4.0 mm. 
     
     
         11 . The jewelry clasp according to  claim 1 , wherein the height of the fastening parts (A, B) is in the range of 4 to 6 mm, especially preferably 4.5 to 5.5 mm, or 5 mm and the fastening parts (A, B) have an outside diameter of 2 to 4 mm, 2.5 to 3.5 mm, or 3 mm, and fastening part (A) has an inside diameter of 2 to 2.25 mm, or of 2.1 mm and fastening part (B) has an inside diameter of 1.9 mm to 2.05 mm, or of 2.0 mm. 
     
     
         12 . The jewelry clasp according to  claim 1 , wherein the height of the fastening parts (A, B) is in the range of 10 to 30 mm, 15 to 25 mm, or 20 mm and the fastening parts (A, B) have an outside diameter of 5 to 15 mm, 6 to 13 mm, or 12 mm, and fastening part (A) has an inside diameter of 5 to 10 mm, or of 8.4 mm and fastening part (B) has an inside diameter of 6 mm to 10 mm, or of 8 mm. 
     
     
         13 . The jewelry clasp according to  claim 1 , wherein the barbs of a fastening part (A or B) are positioned further in the holding devices of the corresponding fastening part (B or A) when there is a pull along the imaginary axis ( 30 ) of opening and closing running centrally in the fastening parts (A, B). 
     
     
         14 . The jewelry clasp according to  claim 1 , wherein the opening and closing of the jewelry clasp takes place by rotation of the two fastening parts (A, B) in opposite directions. 
     
     
         15 . The jewelry clasp according to  claim 1 , wherein the fastening parts (A, B) comprise refined zinc alloys, stainless steel, aluminum, silver, gold, ceramic material, titanium, ABS plastic, glass fiber-reinforced plastic and/or carbon fibers. 
     
     
         16 . The jewelry clasp according to  claim 1 , wherein the fastening parts (A, B) are produced by milling, by CNC milling, by injection molding and/or by die casting methods. 
     
     
         17 . The jewelry clasp according to  claim 1 , wherein one of the two fastening parts (A, B) is provided with a sheathing of nonmagnetic stainless steel, aluminum, ceramic material, titanium, plastic and/or noble metals. 
     
     
         18 . The jewelry clasp according to  claim 17 , wherein the noble metals are selected from a group consisting of gold, silver, platinum, iridium, palladium, osmium, rhodium, ruthenium and a combination of these noble metals. 
     
     
         19 . The jewelry clasp according to  claim 17 , wherein the sheathing on one of the two fastening parts (A, B) is affixed by hydraulic pressing. 
     
     
         20 . The jewelry clasp according to  claim 1 , wherein the permanent magnets are affixed in the fastening parts (A, B) by hydraulic pressing or adhesive bonding. 
     
     
         21 . (canceled) 
     
     
         22 . A method of fastening comprising providing the jewelry clasp according to  claim 9  and using the clasp as a safety fastener and/or fastening system. 
     
     
         23 . A bracelet comprising a jewelry fastener according to  claim 1 . 
     
     
         24 . A kit comprising at least two bracelets according to  claim 23 , which are joined to one another in such a way as to form a necklace.