Bidirectional-fastened ultrasonic osteotomy knife

Abstract

The invention discloses a bidirectional-fastened ultrasonic osteotomy knife, which comprises a shell, wherein a piezoelectric actuator and an ultrasonic vibrator are arranged at one end of the interior of the shell, and the ultrasonic vibrator is connected to the piezoelectric actuator; a sleeve is arranged on the ultrasonic vibrator; and the sleeve extends from the other end of the shell. According to the osteotomy knife disclosed by the invention, a long through slot is arranged on the sleeve and a connecting pillar which is arranged on a knife rod is capable of extending out of the long through slot, therefore the knife rod can be moved inside the sleeve as a sliding block is moved so as to remove the length of the knife rod; when the sliding block is moved nearby some limiting groove, the connecting pillar can be screwed into the limiting groove by rotating the knife rod, at which time two tension springs at the tail end of the moving knife rod are gradually tightened and winding force, which is in the radial direction of the knife rod, is generated between the two tension springs, so that the connecting pillar on the knife rod is firmly fastened in a semicircular clamping groove under the action of force in two directions; and the osteotomy knife is high in fastening strength and is also quite convenient in adjusting mode.

Description

technical field [0001] The invention relates to a medical orthopedic knife, in particular to a two-way fastening type ultrasonic osteotomy knife. Background technique [0002] The ultrasonic bone cutting knife mainly converts electrical energy into ultrasonic vibration through piezoelectric technology, and uses the mechanical effect of ultrasound to make the knife head generate telescopic vibration in the front and rear directions, and cooperate with the knife head to cut bone. The vibration amplitude should not be too large during bone cutting. Therefore, ultrasonic vibration is the most suitable. [0003] The traditional cutting knife has a relatively simple function first, and only one type of blade can be installed on a knife bar, which needs to be replaced when it is used; in addition, the length of the knife bar cannot be adjusted; in another case, the length of the knife bar can be adjusted, but after adjustment It is necessary to use fastening bolts to lock the posi...

AI Technical Summary

Problems solved by technology

[0003] The traditional cutting knife has a relatively simple function first, and only one type of blade can be installed on a knife bar, which needs to be replaced when it is used; in addition, the length of the knife bar cannot be adjusted; in another case, the length of the knife bar can be adjusted, but after adjustment It is necessary to use fastening bolts to lock the position of the knife rod, so that it can work better with ultrasonic vibration. This adjustment method is more troublesome.

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