卡扣主要作用是连接前后壳，稳定间隙，方便组装，节约单价成本。缺点是没有螺钉强度好，可靠性高。
The main function of the buckle is to connect the front and rear shells, stabilize the gap, facilitate assembly, and save the cost of unit price. The disadvantage is that there is no screw strength and high reliability.
当然，只要卡扣分布与强度设计好，再结合合理的螺钉位置布局，就可以打造出一套完美的产品结构。即满足了结构强度，也满足了成本需求，更满足了装配要求，是不二选择的最佳方式，卡扣在整个产品结构当中主要起辅助作用。
Of course, as long as the distribution and strength of the snap design is good, combined with a reasonable layout of the screw position, you can create a perfect product structure. Not only meets the structural strength, but also meets the cost requirements, and more meet the assembly requirements, is the best way to choose, buckle in the entire product structure plays a major role in supporting.