Clasp assembly for a watch chain

Abstract

A clasp assembly, which can be disconnected or connected with a watch chain quickly, includes a clasp cap, an inner bend plate, outer band plate, a screw, a rivet and an elastic shaft. The inner bend plate comprises an arc plate body and two cylindrical bodies, the two cylindrical bodies disposed on one end of the plate body, a thread hole provided on the surface of a distal end of each cylindrical body, a through hole provided on the other end of the plate body and a convex clasp provided on each side of the plate body. A groove is provided in the middle of the outer bend plate and a through hole is formed on one end of the out bend plate, which comprises two sections spaced by the groove, and linked with the through hole of the inner bend plate by engaging with the rivet pivotally. A through hole is formed on the other end of the outer bend plate which remains integral, and concave clasps are disposed symmetrically on the inner sides of the outer bend plate. The clasp cap is pivotally connected with the thread hole of the inner bend plate by the screw, through holes disposed in two side plates of the clasp cap. A hook clasp and a locking clasp for being connected with the watch chain are mounted on the elastic shaft engaging with the through holes, the locking clasp fitting into the hook clasp. A security cover is pivotally mounted on the rivet connecting the outer bend plate with the watch chain.

1 . A clasp assembly, which can be disconnected or connected with a watch chain quickly, including a clasp cap, an inner bend plate, outer band plate, a screw, a rivet and an elastic shaft, wherein 
 the inner bend plate comprises an arc plate body and two cylindrical bodies, the two cylindrical bodies disposed on one end of the plate body with a same axis or approximately same axis, a thread hole provided on the surface of a distal end of each cylindrical body, a through hole provided on the other end of the plate body and a convex clasp provided on each side of the plate body;    the outer bend plate has an arc shape with a thickness, a groove provided in the middle of the outer bend plate, a through hole formed on one end of the out bend plate, which comprises two sections spaced by the groove, and linked with the through hole of the inner bend plate by engaging with the rivet pivotally, a through hole formed on the other end of the outer bend plate which remains integral, and concave clasps are disposed symmetrically on the inner sides of the outer bend plate to engage with the convex clasps; and    the clasp cap is pivotally connected with the thread hole of the inner bend plate by the screw, through holes with a same axis disposed in two side plates of the clasp cap, characterized in that a hook clasp and a locking clasp for being connected with the watch chain are mounted on the elastic shaft engaging with the through holes with a same axis in the side plates of the clasp cap and can rotate independently, the locking clasp fitting into the hook clasp.    
   
   
       2 . A clasp assembly as claimed in  claim 1 , characterized in that the hook clasp is in a form of a metal sheet, on one end of which there are two rings curved upward, a groove between the rings and lugs extending outside the rings for controlling its rotation angle and on the other end of which there are two hooks curved upward for being connecting with the watch chain.  
   
   
       3 . A clasp assembly as claimed in  claim 2 , characterized in that the locking clasp is in a form of a metal sheet, on one end of which a ring is formed, its width being narrow than that of the groove between the two rings of the hook clasp, on the other end of which a fastening clasp is formed for engaging with the hook to fasten the watch chain to the clasp assembly.  
   
   
       4 . A clasp assembly as claimed in  claim 1 , characterized in that the outer bend plate is pivotally connected with the watch chain by a rivet, on which a security cover is disposed pivotally on both outer sides of the outer bend plate.  
   
   
       5 . A clasp assembly as claimed in  claim 4 , characterized in that the security cover is a metal frame with a U-shaped section, two side plates of which have tongues extending backward for pivotally connecting with the rivet, a notch disposed on each side plate for engaging with the screw.  
   
   
       6 . A clasp assembly as claimed in  claim 5 , characterized in that a tap formed integrally on the top of the metal frame for being unlocked by hand.  
   
   
       7 . A clasp assembly as claimed in  claim 4 , characterized in that a spacer is provided between the security cover and the watch chain.  
   
   
       8 . A clasp assembly as claimed in  claim 4 , characterized in that a protrusion is disposed on each inner side of two side plates of the metal frame, and a through hole corresponding to the protrusion is disposed on each side plate of the clasp cap.  
   
   
       9 . A clasp assembly as claimed in  claim 2 , characterized in that the outer bend plate is pivotally connected with the watch chain by a rivet, on which a security cover is disposed pivotally on both outer sides of the outer bend plate.  
   
   
       10 . A clasp assembly as claimed in  claim 3 , characterized in that the outer bend plate is pivotally connected with the watch chain by a rivet, on which a security cover is disposed pivotally on both outer sides of the outer bend plate.  
   
   
       11 . A clasp assembly as claimed in  claim 9 , characterized in that the security cover is a metal frame with a U-shaped section, two side plates of which have tongues extending backward for pivotally connecting with the rivet, a notch disposed on each side plate for engaging with the screw.  
   
   
       12 . A clasp assembly as claimed in  claim 10 , characterized in that the security cover is a metal frame with a U-shaped section, two side plates of which have tongues extending backward for pivotally connecting with the rivet, a notch disposed on each side plate for engaging with the screw.  
   
   
       13 . A clasp assembly as claimed in  claim 11 , characterized in that a tap formed integrally on the top of the metal frame for being unlocked by hand.  
   
   
       14 . A clasp assembly as claimed in  claim 12 , characterized in that a tap formed integrally on the top of the metal frame for being unlocked by hand.  
   
   
       15 . A clasp assembly as claimed in  claim 9 , characterized in that a spacer is provided between the security cover and the watch chain.  
   
   
       16 . A clasp assembly as claimed in  claim 10 , characterized in that a spacer is provided between the security cover and the watch chain.  
   
   
       17 . A clasp assembly as claimed in  claim 9 , characterized in that a protrusion is disposed on each inner side of two side plates of the metal frame, and a through hole corresponding to the protrusion is disposed on each side plate of the clasp cap.  
   
   
       18 . A clasp assembly as claimed in  claim 10 , characterized in that a protrusion is disposed on each inner side of two side plates of the metal frame, and a through hole corresponding to the protrusion is disposed on each side plate of the clasp cap.