spring buckle

基本解释

If the seat belt buckle lies across the frame of the child seat it will be under pressure and may spring open in an impact.
如果安全带的扣穿过儿童座椅的框架，在于它会受到压力，并可能影响春季开放。
blog.sina.com.cn
The outer surface of the bracelet ring is coated by gold, silver and decorative coating. The connecting device can adopt a spring or a snap buckle sheet.
手镯环为中空环形结构，采用硬塑或轻金属，外表面镀（涂）金、银及装饰涂料。
ip.com
The utility model relates to the technical field of sports equipment, particularly a safety type self-spring buckle which is convenient for users to put on roller skating shoes.
本实用新型涉及运动器材技术领域，特指一种便于使用者穿着溜冰鞋的安全式自弹芭扣。
ip.com