Concealed wiring type hinge, box door and test box

The invention relates to a concealed wiring type hinge, a box door and a test box and belongs to the technical field of mechanical equipment. A cable in the concealed wiring type hinge is arranged between a first part and a second part and is arranged in a second part fixing hole in a penetrating manner, and wire twisting is avoided; and the problem that in the prior art, because the cable is used for a long time or a wire protecting hose is damaged, potential safety hazards exist is solved. Meanwhile, by means of covering of a protecting cover and fixation of the cable, attractiveness of the product is also taken into consideration; and the concealed wiring type hinge, the box door and the test box are simple in structure, low in cost and quite wide in application field. 本发明涉及种暗线式铰链、箱门及试验箱，属于机械设备技术领域。该暗线式铰链中的线缆设置于第部件与第二部件之间，且并穿设于所述的第二部件固定孔中，避免电线扭曲，解决现有技术中因长时间使用电缆线或者护线软管损坏，存在安全隐患的问题，同时，进步通过护盖遮盖并固定线缆，兼顾了产品的美观，且本发明的暗线式铰链、箱门及试验箱结构简单，成本低廉，应用领域也相当广泛。