Anti-drill joint for public telephone, has rectangular prismatic body equipped with front hinged door and fixed with lower base of telephone self i.e. coin collector, where front hinged door is arranged with layers of different materials

摘要

The joint has a rectangular prismatic body (1) equipped with a front hinged door (2) and fixed with a lower base of a telephone self (3) i.e. coin collector, where the front hinged door is made of steel. The telephone self is constituted by an outer body (4) and an inner body (5) that surround with each other, where hardness of the outer part is lower than hardness of the inner body. The front hinged door is arranged with two layers of different materials. A steel sheet is rolled with the inner body.