Buckle assembly with safety lock

Abstract

A buckle assembly has a mounting bracket and a safety lock. The mounting bracket has a base and two wings. The mounting bracket has a front through hole, a rear through hole and a first clamping element. The wings are formed on the base. The safety lock is mounted pivotally on the base and has a pivot pin, a locking block and a manipulating lever. The pivot pin is mounted rotatably on the wings. The locking block is formed on the pivot pin and has a second clamping element corresponding to the first clamping element. The manipulating lever is formed on the pivot pin. The safety lock firmly holds a strap on the mounting bracket without inadvertently slipping. Therefore, the buckle assembly has excellent skidproof characteristic

What is claimed is: 
     
         1 . A buckle assembly comprising:
 a mounting bracket having
 a base having
 a front through hole defined through a front edge of the base; 
 a rear through hole defined through a rear edge of the base; and 
 a first clamping element formed on a top surface of the base and having a front end and a rear end; and 
 
 two wings formed on and protruding upward respectively from two opposite sides of the base; and 
   a safety lock pivotally mounted on the mounting bracket and having
 a pivot pin mounted rotatably between the wings of the mounting bracket; 
 a locking block formed on and protruding radially from the pivot pin and having a distal side and a second clamping element formed on the distal side and corresponding to the first clamping element; and 
 a manipulating lever formed on and protruding radially from the pivot pin; 
   wherein when the safety lock is pivoted to make the manipulating lever parallel to the base of the mounting bracket, the second clamping element faces the first clamping element such that a distance between the second clamping element and the first clamping element is decreased.   
     
     
         2 . The buckle assembly as claimed in  claim 1 , wherein
 each wing has a pivot hole defined through the wing; and   the pivot pin has two opposite ends rotatably mounted respectively in the pivot holes of the wings.   
     
     
         3 . The buckle assembly as claimed in  claim 2 , wherein
 the front end of the first clamping element is close to the front edge of the base, and the rear end of the first clamping element is close to the rear edge of the base;   the first clamping element is inclined relative to the top surface of the base and rises gradually from the front end to the rear end such that the rear end of the first clamping element is higher than the front end of the first clamping element;   the pivot hole of each wing is an elongated hole being substantially parallel to the top surface of the base;   the ends of the pivot pin are rotatably and slidably mounted respectively in the pivot holes of the wings;   wherein the safety lock parallel to top surface of the base of the mounting bracket is able to further slide from the front through hole to the rear through hole and the ends of the pivot pin simultaneously slide respectively in the pivot holes of the wings, thereby moving the second clamping element to the rear end of the first clamping element close to the rear through hole; therefore the distance between the second clamping element and the first clamping element is further decreased.   
     
     
         4 . The buckle assembly as claimed in  claim 3 , wherein the manipulating lever is substantially perpendicular to the locking block. 
     
     
         5 . The buckle assembly as claimed in  claim 4 , wherein the manipulating lever has an auxiliary clamping protrusion formed on and protruding from the manipulating lever; when the safety lock is pivoted to make the manipulating lever parallel to the base of the mounting bracket, the auxiliary clamping protrusion faces the top surface of the base such that a distance between the auxiliary clamping protrusion and the top surface of the base is decreased. 
     
     
         6 . The buckle assembly as claimed in  claim 5 , wherein the first clamping element is formed between the front through hole and the rear through hole. 
     
     
         7 . The buckle assembly as claimed in  claim 6 , wherein
 the first clamping element has multiple clamping teeth; and   the second clamping element has multiple clamping teeth.