Prevent tearing open casing

The utility model belongs to the mechanical parts field discloses a prevent tearing open casing, has solved among the prior art casing because of dismantling the problem that causes the casing damaged of opening repeatedly. The utility model provides a prevent tearing open casing includes upper casing and lower casing, a serial communication port, the top of upper casing is provided with the spring pin, the side of upper casing is provided with the cylindric lock, on the lower casing with the spring pin with the relative punishment of cylindric lock do not is provided with elasticity pinhole and the cylinder cotter way that the size is mated, when the upper casing assembles with the lower casing, cylindric lock and spring pin are fixed in respectively cylinder cotter way and spring pin are downthehole in order to form confined casing cavity. The utility model provides a pair of prevent tearing open casing, the assembly is simple to can close the casing repeated tearing open under the circumstances that does n