Semicircular spiral expander unlocking device

Abstract

A semicircular spiral expander unlocking device is provided by the invention and comprises a sleeve shell, a handle and a push rod, wherein an arc slide way and an unlocking mechanism are arranged in the sleeve shell; the bottom end of the unlocking mechanism is movably connected with the arc slide way; the sleeve shell is fixedly connected with one end of the handle; a linear slideway and a sliding rod are arranged in the handle, and the sliding rod can slide in the linear slideway; one end of the push rod is connected with the unlocking mechanism, and the other end of the push rod is hinged to the sliding rod; the unlocking mechanism, the push rod and the sliding rod form a crank sliding block mechanism; the sliding rod moves in the linear sliding way to drive the push rod to move, and therefore the unlocking mechanism is driven to slide in the arc sliding way. When the unlocking mechamism slides to a position above a spiral expander key hole,an unlocking device key arranged in the unlocking mechanism automatically pops out, so that the unlocking effect is achieved, and the bow expanding operation is completed. In the using process, the situations that a key falls off or the arch is not expanded in place and the like can be well avoided, meanwhile, an operator can complete arch expansion operation without stretching the hand into the oral cavity, the possibility of accidental injury is reduced, and the treatment efficiency is improved.

Description

technical field [0001] The invention belongs to the field of oral medical instruments, in particular to a semicircular spiral expander unlocker. Background technique [0002] The expander is usually composed of a spiral expander, a retention snap ring, a hyperbolic labial arch and a base. The keyhole on the middle metal shaft is rotated through the unlocker to open the expander, so that the correction force or orthopedic force can be passed through the base. Or braces are delivered to the teeth and alveolar bone to open the palatal suture and / or widen the width of the maxillary and maxillary arches. [0003] At present, the unlocker for opening the screw expander is mainly an adjusting rod that conforms to the steel wire bending and forming of the diameter of the screw expander key hole, such as figure 1 shown. However, in daily oral treatment, this lock pick has the following disadvantages: [0004] 1. The child is young and the oral volume is limited. Parents need to pu...

AI Technical Summary

Problems solved by technology

[0005] It is easy to cause accidental injury, and it is easy to bring bacteria into the mouth, which brings health risks;

[0006] 2. The hole diameter of the "key hole" of the spiral expander is small, and it is difficult to find a suitable angle to insert into the "key hole" during the operation. At the same time, when an expansion operation is completed and the unlocker is to be pulled out, the position of the key hole may rotate, affecting At the same time, it will make it difficult to find the hole during the next expansion operation;

[0007] 3. The working end of the traditional unlocker has a linear structure, which is longer overall and sharper. During the operation, there is a possibility of piercing the palate mucosa of the child through the "keyhole" or the expanded base gap.

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