The shell buckle of Yinglang 19 flashlight is broken. Why?

If you have a 2.5mm twist drill in hand, drill three holes at the same distance between the lamp holder and the clip, and then find some 3.5mm self-tapping screws (just remove a few from the small household appliances at home, or go to the aluminum alloy window shop and ask for some, and others will give them). Twist two first, fasten the lampshade, and finally twist the third one. Then tighten the three screws evenly.

Can be repaired according to the above method.