CN-122005119-A - Micro tooth gap expander self-locked through worm gear

CN122005119ACN 122005119 ACN122005119 ACN 122005119ACN-122005119-A

Abstract

The invention discloses a micro tooth gap expander self-locking through a worm gear and a worm, which belongs to the field of orthodontic medical appliances and comprises a shell, wherein a worm gear and worm mechanism is arranged in the shell, one end of the worm penetrates through the side wall of the shell and is provided with a hexagonal nut, the front end of the shell is provided with a guide chute, a symmetrical expansion block with an arc groove is arranged in the chute, the front end of the worm gear is provided with an elliptic cylinder matched with the arc groove, the front end of the expansion block is provided with a fixing support with a rough surface, an indication rod is also vertically arranged, and the outside of the shell is sleeved with a protective sleeve. The self-locking device is self-locking after adjustment by means of the worm and gear, so that the teeth are prevented from rebounding, the oval column pushes the expansion block to realize micro accurate expansion, the visual expansion amount of the indicating rod is achieved, the protective sleeve is prevented from being touched by mistake, the whole structure is small and exquisite, the oral cavity partial gap is expanded, the operation is convenient, and the expansion force is stable.

Inventors

YANG FENGLIAN
PAN XU
LI YUSHUN

Assignees

新疆生产建设兵团第二师库尔勒医院

Dates

Publication Date: 20260512
Application Date: 20260318

Claims (4)

1. The micro tooth gap expander capable of self-locking through the worm and the worm is characterized by comprising a shell (1), wherein a worm and worm gear mechanism (2) is arranged in the shell (1), the worm gear axis of the worm and worm gear mechanism (2) is perpendicular to the front end face and the rear end face of the shell (1), one end of the worm penetrates through the side wall of the shell (1) and is coaxially connected with a hexagonal nut (3), an opening is formed in the front end face of the shell (1), horizontal guide sliding grooves (102) are symmetrically formed in the inner sides of the upper edge and the lower edge of the opening, two expansion blocks (5) which are bilaterally symmetrical are in sliding fit with the guide sliding grooves (102), an elliptic cylinder (4) is fixedly arranged on the front end face of the worm gear, bilaterally symmetrical arc grooves (501) are formed in one side of the two expansion blocks (5) facing the worm gear, fixing brackets (6) are fixedly arranged at the front ends of the two expansion blocks (5) respectively, and the fixing brackets (6) are used for being fixedly adhered to tooth surfaces.
2. The micro tooth gap expander self-locking through a worm gear and a worm according to claim 1, wherein the upper ends of the two expansion blocks (5) are vertically provided with indication rods (7), and the two indication rods (7) are mutually matched to display expansion gaps.
3. The micro tooth gap expander self-locking through the worm and gear according to claim 1 is characterized in that a protecting sleeve (8) is sleeved outside the shell (1), and the protecting sleeve (8) covers the shell (1) and the hexagonal nut (3).
4. The micro tooth gap expander self-locking by a worm gear according to claim 1, wherein the surface of the fixing support (6) attached to the tooth surface is concave and rough.

Description

Micro tooth gap expander self-locked through worm gear Technical Field The invention belongs to the technical field of orthodontic medical appliances, and particularly relates to a micro tooth gap expander self-locking through a worm gear. Background In the clinical operations of orthodontic treatment and dental restoration, a small amount, accuracy and stability of development of the adjacent gap between a single tooth or two adjacent teeth are often required to meet the clinical demands of tooth alignment, restoration in place or orthodontic fine adjustment. Such local gap adjustment has high requirements for expansion accuracy, force stability and device miniaturization. The conventional screw type bow expander has the obvious defects that when flexible parts such as elastic wires, rubber rings and the like are adopted for expansion, the force value is uncontrollable and easy to attenuate, the self-locking function is not provided, the teeth are easy to rebound after expansion, the whole structure of the conventional screw type bow expander is heavy, the volume is large, and the screw type bow expander is difficult to adapt to micro expansion scenes of partial single gaps in the oral cavity, so that the use limitation is large. Disclosure of Invention Aiming at the defects of the prior art, the invention provides the micro tooth gap expander which is self-locked by the worm and the gear, realizes micro, accurate and constant expansion of local adjacent gaps, utilizes the natural self-locking characteristic of the worm and the gear, locks immediately after adjustment, prevents teeth from rebounding, has a miniaturized structure, and is suitable for local operation of an oral cavity. The technical scheme includes that a micro tooth gap expander is self-locked through a worm wheel and a worm, a casing body is provided with a rectangular opening on the front end face of the casing, a worm wheel and worm mechanism is arranged in the casing, the axis of a worm wheel of the worm wheel and worm mechanism is perpendicular to the front end face and the rear end face of the casing, one end of the worm penetrates through the side wall of the casing and is coaxially provided with a hexagon nut, the worm can be rotated through rotation of the hexagon nut so as to drive the worm wheel to rotate, guide sliding grooves are symmetrically formed in the upper edge and the lower edge of the opening of the front end face of the casing, two expansion blocks which are bilaterally symmetrical are installed through the guide sliding grooves in the upper edge and the lower edge of the opening of the front end face of the casing, the expansion blocks can slide left and right in the guide sliding grooves, protruding oval columns are arranged on the front end face of the expansion blocks, one face of the expansion blocks corresponding to the worm wheel is provided with arc grooves, the arc grooves are bilaterally symmetrical, when the two expansion blocks are mutually attached, the arc grooves are extruded along with the arc grooves, the left expansion blocks and the two expansion blocks are pressed along with the arc grooves, the two expansion blocks slide along the guide sliding grooves along the two side sliding grooves when the two expansion blocks are respectively, and the two expansion blocks are fixedly adhered to each other, and the two tooth support the tooth support faces can be rotatably and can be fixed along with the tooth support teeth, and tooth support teeth can be fixed by the tooth support and tooth support. Further, the front ends of the two expansion blocks are respectively provided with the indicating rods which are vertically arranged, when the two expansion blocks are attached, the two indicating rods are attached, the upper ends of the indicating rods extend to the upper side of the shell, the size of a gap between the two expansion blocks can be visually displayed through the indicating rods, and then the tooth gap can be accurately adjusted. Further, the outside cover of casing is equipped with the lag, the lag profile agrees with and can wrap up hexagonal nut with the casing, through the lag with the whole parcel of device avoid touching the worm by mistake, improves the comfort level after the installation simultaneously. The invention has the beneficial effects that: 1. The self-locking characteristic of the worm and the worm is utilized, the adjustment is stopped, namely the locking is realized, the constant expansion force is realized, the rebound of teeth is prevented, and the requirement of stabilizing orthodontic clearances is met; 2. the rigid impact is avoided, the defect of heavy weight of the traditional bow expander is overcome, and the accurate development of the gap of a single tooth is adapted; 3. The whole simple operation, hexagonal nut adaptation oral cavity instrument, the pilot rod realizes expanding the visual, and lag cladding nut avoids fish tail and mistake to touch, promotes clinica