卡扣设备一般来说，由定位件、紧固件组成。定位件作用是在安装时，引导卡扣顺利、正确、快速的到达安装位置。而紧固件作用是。可拆卸紧固件通常被设计成当施 加一定的分离力后，卡扣设备会脱开，两个连接件分离。这种卡扣设备，常用于连接两个需要经常拆开的零件。不可拆卸紧固件需要人为将紧固件偏斜，方能将两零件拆开， 多用于使用过程中不拆开零件的连接固定。

The fastening device is generally made up of a locating piece and a fastener. The role of the positioning device is that the guide buckle is smoothly, correctly and rapidly reached the installation position at the time of installation. The fastener action is. Removable fasteners are usually designed to disengage the two connectors when a certain separation force is applied. This fastening device is often used to connect two parts that need to be taken apart often. The non removable fasteners need to be artificially skewed to allow the two parts to be taken apart. They are used to secure the connection of the parts without using them.