卡扣是用于一个零件与另一零件的嵌入连接或整体闭锁的机构，通常用于塑料件的联接，其材料通常由具有一定柔韧性的塑料材料构成。卡扣连接最大的特点是安装拆卸方便，可以做到免工具拆卸。现在卡扣连接技术已越来越多的应用于汽车内饰件的连接上。
Clasp is used for one part and another part of the embedded connection or the whole locking mechanism, usually used for the connection of plastic parts, its material is usually composed of a certain flexibility of plastic materials. The biggest feature of buckle connection is that it is easy to install and disassemble, and can be disassembled without tools. Nowadays, fastener connection technology has been applied more and more to the connection of automotive interior parts.