长城卡扣安装的注意事项 Notice of the installation of the long city card 长城卡扣在安装时，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： At the time of installation, 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。长城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 long city card fasteners the deformation and rebound of fasteners to implement the installation. 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，注意要使长城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 aware that there will be some obvious phenomena such as sound and movement of the hand when the long city card is attached to the position. 3）、设计时，注意长城卡扣的约束数量，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。 3) when designing, pay attention to the number of constraints in the long city card, which cannot be restricted. 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.