卡扣在安装时，操作者主要通过手感以及声音来判断卡扣安装是否到位，因此在设计时需要注意以下几点： When the card is installed, the operator mainly USES the feeling and sound to determine whether the card is in place, so pay attention to the following points when designing: 1）、选择合适的变形量。卡扣通过紧固件的变形和反弹来实现安装。而太小的变形量容易造成安装不牢固；太大的变形量又容易导致安装困难甚至无法安装，破坏卡扣。 1) select the appropriate deformation. The clocking is installed through the firmware deformations and rebounds. Too small a deformation can cause the installation to be unstable; Too much of the deformation can easily lead to difficult installation and even failure to install and damage the buckle. 2）、设计时，注意要使卡扣在安装靠位时出现一些比较明显的现象，如声音以及手感上的变化。 2) when designing, be careful to make sure that when you install the card you have some noticeable changes, such as sound and movement of the hand. 3）、设计时，注意卡扣的约束数量，不能出现过约束的情况。约束过多，对零件的加工精度要求较高。在实际装配过程，容易导致安装不到位或不能安装。 When designing, pay attention to the number of restraints on the buckle, and no constraints. Too much restriction, the processing precision of the part is higher. In the actual assembly process, it is easy to be installed or not installed.