Quick release sternum closing fixator

A quick release sternum closing fixator, comprising:

• a locking roller, and a male fixing piece and a female fixing piece configured to engage each other,
• wherein a cross section of the locking roller is olive-shaped or oval in shape,
• wherein the male fixing piece has an elastic plug and a first claw hook plate, the elastic plug has a first serration on each of two side surfaces and a tightening groove disposed in the middle, thus forming two elastic claws, the tightening groove is provided with a locking hole for a transition fit with an outer wall surface of the locking roller, and the direction of a long axis of the locking hole is the aligned with the direction in which the male fixing piece engages the female fixing piece,
• wherein the female fixing piece has a second claw hook plate and a socket, the socket has a slot matching the elastic plug, and the slot has a second serration matching the first serration on both sides each of the two side surfaces,
• wherein the locking hole is installed with the locking roller inside so that, by rotating the locking roller, the two elastic claws are distracted and the first serration engages the second serration when the direction of a short axis of the locking roller aligned with the direction in which the male fixing piece engages the female fixing piece, and the first serration is separable from the second serration when the direction of long axis of the locking roller is aligned with the direction in which the male fixing piece and engages the female fixing piece,
• wherein a tensioning device forcing the two elastic claws to move against each other is provided between the locking roller and the two elastic claws,
• wherein the tensioning device comprises:
• an upper flange formed on an upper surface of the locking roller, wherein the two strain pins are symmetrically arranged on the upper flange,
• a tensioning groove is formed on the upper surface of each of the two elastic claws of the elastic plug, wherein the tensioning groove is in an arc shape on the side away from the locking hole and in a cut-off state on the side near the locking hole, and the tensioning groove has a locking bulge on the side near the locking hole, and
• wherein each of the two strain pins is set in the respective tensioning groove, and when the direction of the long axis of the locking roller is aligned with the direction in which the male fixing piece engages the female fixing piece, the strain pin fits with the locking bulge and tensions the two elastic claws against each other.