CN202020522U

CN202020522U - Bidirectional symmetrical moving distractor driven by bevel gear

Info

Publication number: CN202020522U
Application number: CN201120111242XU
Authority: CN
Inventors: 周雁麓; 闫俊中; 闵艳芳
Original assignee: XI'AN ZHONGBANG TITANIUM BIOLOGICAL MATERIALS CO Ltd
Current assignee: XI'AN ZHONGBANG TITANIUM BIOLOGICAL MATERIALS CO Ltd
Priority date: 2011-04-15
Filing date: 2011-04-15
Publication date: 2011-11-02
Anticipated expiration: 2021-04-15

Abstract

The utility model discloses a bidirectional symmetrical moving distractor driven by a bevel gear, relating to the field of oral and maxillofacial surgery apparatus. The technical key points are as follows: one bevel pinion and two bevel gears in a square-box-shaped body form bevel gear drive connection; the rear end of the bevel pinion is fixedly connected with an external six-square head after passing through a body cover; the rear ends of the two bevel gears are respectively fixedly connected with a distracting screw rod after passing through two sides of the body; the distracting screw rods freely rotate in guiding bodies fixedly connected to two ends of the body; and a left movable wing and a right movable wing are in driving connection with the distracting screw rods through screw threads and are controlled by the guiding bodies to move along the direction of the guiding bodies. The bidirectional symmetrical moving distractor is artful in design, compact in structure, and particularly suitable for built-in bidirectional symmetrical moving distraction operations for patients with lower jawbone micrognathia, and a distraction osteogenesis task is effectively finished through the mechanical combination movement of the screw rods, the bevel pinion, the bevel gears and the movable wings.

Description

The Bevel Gear Transmission bi-directional symmetrical moves the stretching device

Technical field

This utility model relates to the Oral and Maxillofacial Surgery instrument field, and particularly a kind of Bevel Gear Transmission bi-directional symmetrical moves the stretching device.

Background technology

(Distraction Osteogenesis is after cutting by bone, to use special traction apparatus DO) to the distraction osteogenesis art, and slowly tractive forms the purpose that new bone reaches the skeleton prolongation thereby make in the osteotomy gap.The distraction osteogenesis technology is the most normal to be applied to prolong mandibular bone, treats the micrognathia that all kinds of reasons cause, and can make mandibular bone prolong 10～30mm.

Being applied to clinical mandibular bone DO device the earliest is the stretch device of externally positioned type single direction, and this stretching device can only prolong mandibular bone at single direction, and often there is the bone quantity not sufficient of relative direction simultaneously in the odd-shaped patient of mandibular bone.The two-way stretching device of externally positioned type occurred,, can on both direction, prolong mandibular bone simultaneously by on mandibular bone, making two osteotomy lines thereafter.The introducing of two-way externally positioned type traction apparatus has obviously increased the scope of application of mandibular bone deformity distraction osteogenesis.But the major defect of externally positioned type mandibular bone stretching device is that volume is bigger, and patient's sense of discomfort is obvious, and can leave over nonvolatil skin scar at face.The internally-arranged type stretching device of Dan Shenging has solved above problem effectively subsequently, but needs to settle at two positions simultaneously the stretching device of different directions, and this has increased operating difficulty, operation wound and operating time undoubtedly.And built-in two traction apparatuss can not satisfy the needs of patient's bi-directional symmetrical distraction osteogenesis, and it is asymmetric to form the postoperative face easily, causes the patient to bear at heart, influence the self-confidence of its following work life.

Before, the applicant has applied for a kind of utility model " mandibular bone internally-arranged type reversible stretching device " (patent No. ZL2007201260139), has solved the problems referred to above to a certain extent effectively.On the basis of clinical practice, the applicant to the further innovation and perfect of this stretching device, proposes this utility model from the structural design aspect.Compare with the former, this utility model all has more advantage from 26S Proteasome Structure and Function.

Summary of the invention

The purpose of this utility model provides a kind of Bevel Gear Transmission bi-directional symmetrical and moves the stretching device, the built-in bi-directional symmetrical that is specially adapted to mandibular bone micrognathia patient moves stretching technique, with the mechanical aggregate motion of screw rod, big bevel pinion and movable wing, finish the distraction osteogenesis task effectively.This device deft design, compact conformation has fully overcome the deficiencies in the prior art.

Design of the present utility model is: a kind of Bevel Gear Transmission bi-directional symmetrical moves the stretching device, it is characterized in that: a bevel pinion is connected with two bevel gear wheels formation Bevel Gear Transmission in the body of square box shape, the bevel pinion rear end is passed body cap and is fixedlyed connected with outer six square toes, two bevel gear wheel rear ends are passed the body both sides respectively and are fixedly connected with the stretching screw rod, the stretching screw rod freely rotates in the fixedly connected guide way in body two ends, a left side, right movable wing and stretching screw flight are in transmission connection a left side, right movable wing moves in the direction of the control lower edge of guide way guide way.

Characteristics of the present utility model are: it can be applied to the rectification of mandibular bone micrognathia, can carry out distraction osteogenesis simultaneously on two symmetry directions of mandibular bone.Bi-directional symmetrical moves the stretching device and adopts guide way (be the left and right wing) organic be linked together of stretching screw rod with two symmetrical leads.The female thread on the movable wing and the external screw thread of traction screw form the screw thread transmission.Switching traction screw by the rotation of six square toes rotates to different directions.Turn six square toes can drive bevel pinion and rotate, bevel pinion and two bevel gear wheels form the equidirectional Bevel Gear Transmission of two reciprocity speed simultaneously, two bevel gear wheels drive left and right sides stretching screw rod respectively and rotate, the external screw thread of two stretching screw rods and the female thread of left and right form the screw thread transmission makes left and right laterally or inboardly move with identical speed simultaneously, realizes the symmetrical stretching process of mandibular bone.

Advantage of the present utility model and good effect are: in laying operation process of the present utility model, the symmetry that can drive left and right by the turn of six square toes moves, guarantee of the stretching of stretching device, satisfied the needs of patient's symmetry stretching skeleton at the direction realization skeleton of bi-directional symmetrical.From certain meaning, this utility model is that a kind of bi-directional symmetrical of individuation design moves the stretching device.In addition, the power source of this device---six square toes have only one, set up with the traction apparatus of two symmetry directions by the rotation of six square toes to connect.Therefore, only need in the operation can realize the traction of postoperative, reduced the traction wound that exposes, thereby reduced the incidence rate that infects the bi-directional symmetrical direction at reservation traction otch (exposing six square toes outside skin) on the skin.

Description of drawings

Fig. 1, be this utility model structure organigram;

Fig. 2, be big bevel pinion annexation sketch map in this utility model body.

Among the figure, 1, about retaining, 2, the stretching screw rod, 3, body, 4, bevel gear wheel, 5, bevel pinion, 6, body cap, 7, six square toes, 8, rivet, 9, right movable wing, 10, rivet, 11, left movable wing, 12, rivet.

The specific embodiment

Body 3 interior bevel pinions 5 of square box shape form Bevel Gear Transmission with two bevel gear wheels 4 and are connected, bevel pinion 5 rear ends are passed body cap 6 and are fixedlyed connected with outer six square toes 7, two bevel gear wheel 4 rear ends are passed body 3 both sides respectively and are fixedly connected with stretching screw rod 2, stretching screw rod 2 freely rotates in the fixedly connected guide way in body 3 two ends, left side movable wing 11, right movable wing 9 are in transmission connection with stretching screw rod 2 screw threads, and left and right

movable wing

11,9 moves in the direction of the control lower edge of guide way guide way.

Symmetry stretching screw rod 2 tops and bevel gear wheel 4 are fixing by rivet 10, bevel gear wheel 4 and bevel pinion 5 form the bevel-gear sett transmission, bevel pinion 5 rear end parts are built in the hole slot of body 3, and it is fixing by rivet 8 with outer six square toes 7 that front end passes body cap 6.During turn six square toes 7, bevel pinion 1 and bevel gear wheel 4 form Bevel Gear Transmission, set up contact by stretching screw rod 2 and left movable wing 11 and right movable wing 9, can drive left wing 9 and right flank 8 simultaneously laterally or speed such as inboard move, thereby realize the bi-directional symmetrical stretching.

Keep off 1 about guide way two external port are provided with, fixedly connected with guide way by rivet 12.Make that the rotation of stretching screw rod 2 is to carry out at the guide way inner sealing fully.

Claims

1. a Bevel Gear Transmission bi-directional symmetrical moves the stretching device, it is characterized in that: the interior bevel pinion of the body of square box shape (3) (5) forms Bevel Gear Transmission with two bevel gear wheels (4) and is connected, bevel pinion (5) rear end is passed body cap (6) and is fixedlyed connected with outer six square toes (7), two bevel gear wheels (4) rear end is passed body (3) both sides respectively and is fixedly connected with stretching screw rod (2), stretching screw rod (2) freely rotates in the fixedly connected guide way in body (3) two ends, left side movable wing (11), right movable wing (9) is in transmission connection a left side with stretching screw rod (2) screw thread, right movable wing (11,9) direction at the control lower edge of guide way guide way moves.

2. Bevel Gear Transmission bi-directional symmetrical according to claim 1 moves the stretching device, it is characterized in that: symmetrical stretching screw rod (2) top and bevel gear wheel (4) are fixing by rivet (10), bevel gear wheel (4) and bevel pinion (5) form the bevel-gear sett transmission, bevel pinion (5) rear end part is built in the hole slot of body (3), and it is fixing by rivet (8) with outer six square toes (7) that front end passes body cap (6).

3. Bevel Gear Transmission bi-directional symmetrical according to claim 1 moves the stretching device, it is characterized in that: retaining (1) about guide way two external port are respectively arranged with, fixedly connected with guide way by rivet (12).