Cable drum with safety locking device

The utility model relates to a cable drum with a safety locking device, and belongs to the technical field of electric power installation equipment. According to the technical scheme, a barrel body (009) and a spring box (006) are jointly installed on a main shaft (005), and the spring box (006) and the barrel body (009) rotate synchronously; an inner ring of the integrated conductive slip ring is fixed on the main shaft (005), and an outer ring of the integrated conductive slip ring is fixed on the cylinder body (009) and synchronously rotates along with the cylinder body (009); the spring box (006) comprises a shell, a volute spiral spring and a key (011); the reversing mechanism (201) is fixed on the main shaft (005) through the key (011); and the safety locking device is fixed on the outer side of the cylinder body (009). The beneficial effects of the utility model are that: by using the volute spiral spring as power, a mechanical device which can automatically wind and unwind a power cable or a signal ca