Fastener locking device and medical equipment having same

A fastener locking device, comprising a locking piece and a fastener piece, the fastener piece being provided with a clamping head and a clamping rod, one end of the clamping rod being fixedly connected with the clamping head, the other end of the clamping rod being connected with a target object, a clamping hole penetrating through a body of the locking piece and matched with the fastener piece being formed in the locking piece, the clamping hole consisting of at least two connected hole sites, the hole diameter of one hole site being larger than the diameter of the clamping head of the fastener piece so as to allow the clamping head to penetrate through the hole site, the hole diameter of the other hole site being smaller than the diameter of the clamping head but slightly larger than the diameter of the clamping rod for locking the fastener piece, and one of the two connected hole sites being arranged to deflect at a certain angle relative to the other of the two connected hole sites so that an obtuse angle is formed on one side of the joint of the two connected hole sites, wherein a bulge is arranged at a hole inner wall corresponding to the obtuse angle, the distance with the hole inner wall at the position of the bulge is smaller than the diameter of the clamping rod of the fastener piece, and a through hole is formed in a body of the locking piece and adjacent to the position of the obtuse angle, so that the bulge can be elastically deformed when being subjected to pressure and can be quickly restored, and the fastener piece entering one of the hole sites of the clamping hole through the bulge is not prone to slide.