Provided are a latch mechanism and an electronic device case. The latch mechanism includes a base assembly, a pressing assembly and a first elastic member. The base assembly has an accommodating cavity, and a wall surface of the base assembly has a first through hole and a second through hole which are respectively communicated with the accommodating cavity. The pressing assembly includes a main body part, a button part and a bolt part, the main body part is disposed in the accommodating cavity, and the button part and the bolt part are respectively disposed on the main body part. The first elastic member is located in the accommodating cavity, one end of the first elastic member abuts against an inner wall of the accommodating cavity and the other end abuts against the main body part.