Buckles are widely used in various industries, including apparel, bags, automobiles, construction, furniture, aerospace, sporting goods, and medical devices, primarily for connection, fixation, and decoration. In jewelry, buckles are key components connecting the ends of necklaces, bracelets, and other ornaments. Types include S-clasps, stainless steel buckles, and various types of snap clasps, used to improve wearing security, enrich jewelry design, and increase comfort.
In the machinery industry, buckles are commonly used for axial fixing of bearings. For example, C-shaped buckles are used to fix ball bearings to shafts. In railway transportation, buckle-equipped wheelsets must meet performance requirements such as static strength and fatigue strength. Parallel seat gate valves use a spring-loaded valve disc, a fully guided valve disc bracket, and buckle pins to form an assembly. Pressure sealing structures use a combination of washers, thrust rings, and segmented buckles to achieve valve cap sealing. Historically, buckles have also been common in clothing accessories, such as bronze belt buckles from the Spring and Autumn and Warring States periods, mother-and-child buckles from the Ming Dynasty, and gold bracelets from the Sui Dynasty. Double buckles made of Hetian jade symbolize unity, intimacy, happiness, and good fortune.
