Zero self-locking device for linkage platform

The invention relates to a zero self-locking device for a linkage platform and belongs to the technical field of designing a handle mechanism of a crane linkage control platform. The zero self-locking device for the linkage platform comprises a handle and a handle head, wherein the handle head arranged on the handle comprises upper and down two hemispheres; the upper hemisphere is fixed with the handle; the upper end of the lower hemisphere is provided with a spring, a positioning rod and a positioning plate arranged on the lower end of the positioning rod; the positioning plate is provided with a positioning hole; the upper end of the positioning rod is provided with a raised port, which is matched with a spiral slide wall in the lower hemisphere; and after being rotated, the lower hemisphere is fixed at the lifting position, and when the lower hemisphere is released, the lower hemisphere does not drop off but is locked at the lifting state. Under the condition of ensuring the original property of a handle o