To provide a burglary prevention case capable of preventing the damage of projections and reducing a manufacturing cost.
When a burglary prevention case 10 is intended to be opened in a state storing a disk type commodity 12, the locking part 40b of the magnetic spring 38 is simultaneously locked on two projections 62 and the mutual sliding of 1st and 2nd engagement parts 34, 56 is inhibited. Since locking force is shared with two projections 62, force applied to each projection 62 is reduced and the durability of the projections 62 is improved. Thereby the life of a device can be extended. Since it is unnecessary to form a hole for locking projections on the magnetic spring, the entanglement and deformation of the magnetic spring 38 in a barrel polishing process or the like can be prevented.
NOMA YASUHIRO