Buckle

Abstract

A buckle includes a female fastener and a male fastener. The female fastener includes a first body and an engaging structure. The engaging structure is formed on the first body. The male fastener is detachably connected to the female fastener. The male fastener includes a second body and a shaft device. The shaft device is disposed on the second body to be detachably coupled with the engaging structure. When the shaft device is coupled with the engaging structure, the first body can rotate relative to the second body.

1 . A buckle for an infant holding device, the buckle comprising:
 a female fastener comprising:
 a first body; and 
 an engaging structure formed on the first body; and 
   a male fastener detachably connected to the female fastener, the male fastener comprising:
 a second body; and 
 a shaft device disposed on the second body to be detachably coupled with the engaging structure, the first body being rotatable relative to the second body when the shaft device is coupled with the engaging structure. 
   
     
     
         2 . The buckle of  claim 1 , wherein the shaft device defines an axis, and the first body is rotatable relative to the second body about the axis. 
     
     
         3 . The buckle of  claim 1 , wherein the shaft device comprises an engaging pin movably disposed on the second body, and the engaging pin can move relative to the second body between a releasing position and a locking position so as to be selectively separated from or engaged with the engaging structure of the female fastener. 
     
     
         4 . The buckle of  claim 3 , wherein a containing space is formed on the second body, and the engaging pin is movably disposed in the containing space and elastically protrudes from the containing space so as to be engaged with the engaging structure of the female fastener. 
     
     
         5 . The buckle of  claim 4 , wherein the engaging structure of the female fastener has a first axial hole and a second axial hole, an end of the male fastener corresponding to the containing space has a protruding pin for being engaged with the first axial hole, and the shaft device comprises:
 the engaging pin;   an operating part connected to the engaging pin for driving the engaging pin to move; and   an elastic element disposed between the containing space and the engaging pin, for providing an elastic force to drive the engaging pin toward the locking position so as to be engaged with the second axial hole.   
     
     
         6 . The buckle of  claim 5 , wherein the elastic element is a spring. 
     
     
         7 . The buckle of  claim 5 , wherein a sliding slot is formed at a position of the second body corresponding to the containing space, and the operating part is a push button movably disposed in the sliding slot. 
     
     
         8 . The buckle of  claim 7 , wherein an outer side of the push button has a protruding portion. 
     
     
         9 . The buckle of  claim 5 , wherein the operating part is fixed to the engaging pin by a pin. 
     
     
         10 . The buckle of  claim 1 , wherein the engaging structure is a hook for being coupled with the shaft device. 
     
     
         11 . The buckle of  claim 10 , wherein the shaft device has an elliptical cross-section. 
     
     
         12 . The buckle of  claim 11 , wherein the hook has an opening, and the shaft device passes through the opening in a manner that a minor axis of the shaft device faces the opening of the hook, so that the shaft can be separated from or coupled with the hook. 
     
     
         13 . The buckle of  claim 10 , wherein the hook has an opening, the shaft device is capable of passing through the opening when an angle is formed between the male fastener and the female fastener, and the shaft device is incapable of passing through the opening when the male fastener is substantially parallel to the female fastener. 
     
     
         14 . The buckle of  claim 10 , wherein the hook has an opening for the shaft device to pass through, a first stopper is formed at a position of the hook corresponding to the opening, a second stopper for matching with the first stopper is formed on the shaft device, and the shaft device is capable of passing through the opening when the first stopper matches with the second stopper. 
     
     
         15 . The buckle of  claim 14 , wherein the first stopper is a protruding structure, and the second stopper is a recessed structure. 
     
     
         16 . The buckle of  claim 1 , wherein a connecting portion is respectively formed on the first body and the second body for connecting a safety belt of the infant holding device.