Cable tightenerTechnical Field
The invention relates to the technical field of medical appliances, in particular to a cable tightening device for orthopedic surgery.
Background
During bone surgery, the bone fracture and fracture parts are often bundled and fixed by cables. At this time, the cable tightener is used to tighten the cable threaded into the jacket or the lock. The existing cable tightener is characterized in that a knob is rotated anticlockwise, a movable shaft and a rear shaft generate threaded transmission, so that a hexagonal axial sliding block applies pressure, the sliding block presses a top shaft and a spring inwards, and finally, a cavity is opened by the relative sliding of the movable shaft and the top shaft; at this point, the cable can be threaded into the retractor and the knob rotated clockwise to grip the cable.
The existing cable tightener has the following disadvantages:
1. the knob is rotated, so that the movable shaft and the rear shaft are in threaded transmission, and further pressure is applied to the hexagonal axial sliding block, so that the sliding block presses the top shaft and the spring inwards to tighten the cable; in such a locking operation mode, an operator must operate with both hands when using the locking operation mode, so that the locking operation mode is inconvenient to use; the speed of tightening the cable is slow; the rotating tightening mode has long rotating time, when a plurality of cables are needed for one operation, the operation time is greatly increased, and the operation risks are certainly increased for operators and patients;
2. In actual use, after a period of use, the existing cable tightener is free of a cleaning tank and is easy to accumulate blood and dirt for a long time, bacterial infection can be bred, and the situation that parts rust, skid and are not tightly collected can occur, so that pressurization operation cannot be performed.
In summary, there is no cable tightener capable of cyclically and alternately tightening a plurality of cables, which is easy and fast to operate in a similar manner.
Disclosure of Invention
The invention aims to provide the cable tightener which is simple and convenient to operate, can circularly and alternately tighten a plurality of cables, can lock the cables and achieves the pressurizing effect.
The invention is realized by adopting the following technical scheme:
The cable tightener comprises a front cable locking mechanism, a main body, a pressurizing module and a rear cable locking mechanism which are connected in sequence;
The front cable locking mechanism comprises a connector and a connector head, and the end part of the connector head is inserted into the connector sleeve; the tail part of the connector is bent, so that the surgical operation of different parts is facilitated; the connector consists of a connector body, a pre-locking handle and a quick-connection plug, wherein the quick-connection plug is arranged at the front end of the connector body so as to be disassembled and assembled with a quick interface on the main body; the pre-locking handle is movably connected with the connector body through a pin, and rotates around the connecting part by taking the pin as the center so as to pre-lock the cable;
The main body comprises a pressurizing handle, a resetting mechanism and a clamping block, and is used for pressurizing and resetting the instrument; the middle part of the main body is provided with a central through hole which penetrates through the main body, so that the cable can be conveniently penetrated; a quick connector for connecting with a quick plug of the front cable locking mechanism is arranged at the front end of the main body; the pressurizing handle is fixed on the side wall of the rear end of the main body through a pin, and a reset mechanism is arranged between the end part of the pressurizing handle and the side wall of the main body and used for resetting the pressurizing handle, and the reset mechanism is fixed on the main body through the pin; the reset mechanism comprises an adjusting pin and a reset clamping block; a clamping block is fixed on the inner side of the front end of the main body through a pin and is used for being matched with the pressurizing module; the pressurizing module comprises a rack, a disc spring and a pressurizing cylinder, wherein the pressurizing cylinder is a hollow cylinder, and the disc spring is radially arranged in the pressurizing cylinder; the end part of the disc spring is connected with a rack; the rack is meshed with a clamping block at the front end of the main body and is inserted into the main body cavity, so that the main body is connected with the pressurizing module; when the pressing handle is pressed, the clamping block and the rack are driven to displace, so that the disc spring deforms in the pressing cylinder, a pressing effect is achieved, and when the pressing handle is restored, the pressing cylinder of the pressing module plays a role in resetting and guiding the disc spring;
the rear cable locking mechanism comprises a rear cable locking body, a U-shaped groove, an inner sleeve, a locking handle and a cylindrical spring, wherein the rear cable locking body is a hollow part, a cable guide channel penetrating through the whole rear cable locking body is arranged in the middle of the rear cable locking body, the tail end of the rear cable locking body is provided with a hollow inner sleeve, the end part of the inner sleeve is provided with the U-shaped groove, and the upper part of the U-shaped groove is fixedly provided with the cylindrical spring through a pin; the lower end of the U-shaped groove is movably connected with a locking handle through a pin, the locking handle rotates around the U-shaped groove by taking the pin as the center to drive the U-shaped groove to longitudinally displace in the inner sleeve, and simultaneously compress the cylindrical spring, so that a cable is meshed in a tooth slot of the inner sleeve to perform a locking function of a first gear or a second gear, and when the U-shaped groove is completely used, the U-shaped groove is reset by the elasticity of the cylindrical spring;
The front end of the rear cable locking mechanism is inserted into the tail end of the pressurizing module, so that the rear cable locking mechanism is connected with the pressurizing module.
The primary gear means that an included angle between the locking handle and the U-shaped groove is 180 degrees, and the locking handle is perpendicular to the rear locking cable body.
The second gear means that an included angle between the locking handle and the U-shaped groove is 90 degrees, and the locking handle is parallel to the rear locking cable body.
The pre-locking comprises primary pre-locking and secondary pre-locking, wherein the primary pre-locking means that the included angle between the pre-locking handle and the connector body is 180 degrees, and the secondary pre-locking means that the included angle between the pre-locking handle and the connector body is 90 degrees.
The main body is also provided with a circular through groove for cleaning and sterilizing the instruments after operation.
The scale marks are arranged outside the pressurizing cylinder, and the pressurizing cylinder is in a unit system of 10KG, so that the magnitude of the tensile force value born by the cable in the pressurizing and bundling process is marked, and a user is assisted in judging the firmness of bundling.
The operation method of the cable tightener is to sequentially pass a cable to be locked through a front cable locking mechanism, a main body and a pressurizing module and then introduce the cable to a rear cable locking mechanism, and specifically comprises the following steps:
1) The cable to be locked sequentially passes through the front cable locking mechanism, and the inserted cable passes through a central through hole of the main body through a quick connector on the main body after being pre-tightened by adjusting a primary pre-locking position or a secondary pre-locking position through a pre-locking spanner in the front locking structure, so as to be introduced into the rear locking mechanism;
2) The first-level gear or the second-level gear is adjusted through a locking handle in the rear locking mechanism to lock the cable, and then the pressurizing handle is pressed to pressurize; the pressurizing handle is a movable mechanism for pressurizing and fixing the cable in operation, and the disc spring is deformed to exert the pressurizing effect by pressing the pressurizing handle; the U-shaped groove is meshed with the inner sleeve through the locking handle to clamp the cable; the cable is tightly bound and then locked with the lock catch;
3) After the pressurized cable is fixed, the locking handle of the rear cable locking mechanism is opened, the disc spring recovers elastic deformation, the cylindrical spring rebounds to reset the U-shaped groove when the locking handle is opened, the cable tightener is taken out from the cable, and the cable is cut off.
The invention has the advantages that:
1) The device can be operated corresponding to a plurality of cables, when the device is used, the cables can be pre-locked and fixed by using a plurality of groups of front cable locking mechanisms through disassembling the front cable locking mechanisms, and the cables can be sequentially pressurized and locked by using one device, so that the cost is reduced, the operation is simple and convenient, and the working efficiency is improved;
2) The cable locker can be operated by one hand or two hands, and can be arbitrarily selected according to the use habit of an operator;
3) Due to the arrangement of the cleaning tank, the cleaning and disinfecting functions are greatly convenient to use, and bacterial infection and rust of components are prevented;
4) Through marking scale marks on the outer part of the pressurizing cylinder, a user can estimate the magnitude of the tension value received by the cable in the pressurizing and bundling process at any time in the operation process, and the firmness degree of bundling is judged, so that the operation is safer and more reliable, and the success rate of the operation is finally improved;
5) The elbow design of the front locking mechanism is convenient for a user to operate narrow and complex parts in the bundling process, so that the operation is simplified, the operation time is saved, and the operation efficiency is improved.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of the cable retractor of the present invention;
FIG. 2 is a schematic view of the body assembly structure of the present invention;
FIG. 3 is a schematic view of the pressurization module assembly of the present invention (including a rear cable locking mechanism);
FIG. 4 is a top partial cross-sectional view of FIG. 3;
FIG. 5 is a schematic view of the front cable locking mechanism of the present invention;
FIG. 6 is an exploded view of the front cable lock mechanism of the present invention (in a primary pre-lock state);
FIG. 7 is a schematic view of the front cable locking mechanism of the present invention in a secondary pre-locked state;
FIG. 8 is a schematic view of the rear cable lock mechanism assembly of the present invention (the locking handle is in a secondary gear);
FIG. 9 is a schematic view of the rear cable lock mechanism assembly of the present invention (the locking handle is in a primary gear);
FIG. 10 is a diagram of an embodiment of the invention in which graduation marks are provided outside the pressurizing cylinder.
In the figure:
1. A cable retractor;
2. The device comprises a main body, 2-1 parts of a pressurizing handle, 2-2 parts of a reset mechanism, 2-3 parts of a clamping block, 2-4 parts of a quick connector, 2-5 parts of a circular through groove, 2-6 parts of a central through hole, 2-7 parts of an adjusting pin, 2-8 parts of a reset clamping block;
3. the device comprises a pressurizing module, 3-1, a rack, 3-2, a disc spring, 3-3 and a pressurizing cylinder;
4. The front cable locking mechanism comprises 4-1 parts of a front cable locking mechanism, 4-2 parts of a connector, 4-3 parts of a connector, a connector sleeve, 4-4 parts of a connector body, 4-5 parts of a pre-locking handle, 4-6 parts of a quick connector, b parts of a pre-locking handle and an included angle formed between the connector body;
5. A rear cable locking mechanism, 5-1, a rear cable locking body, 5-2, a U-shaped groove, 5-3, an inner sleeve, 5-4 and a locking handle, 5-5 parts of cylindrical springs, 5-6 parts of cable channels, a, and an included angle between the locking handle and the U-shaped groove;
6. Graduation marks.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a cable tensioner 1, which includes a front cable locking mechanism 4, a main body 2, a pressurizing module 3 and a rear cable locking mechanism 5 that are sequentially connected.
FIG. 2 is a schematic view of the components of the cable retractor body 2, including a compression handle 2-1, a return mechanism 2-2 and a latch 2-3 for compression and return of the instrument; the middle part of the main body 2 is provided with a central through hole 2-6 which penetrates through the main body, so that a cable can be conveniently penetrated; the front end of the main body 2 is provided with a quick connector 2-4 for connecting with a quick connector plug 4-6 of the front cable locking mechanism 4; the pressurizing handle 2-1 is fixed on the side wall of the rear end of the main body 2 through a pin, a reset mechanism 2-2 is arranged between the end part of the pressurizing handle 2-1 and the side wall of the main body 2 and used for resetting the pressurizing handle 2-1, and the reset mechanism 2-2 is fixed on the main body 2 through a pin; the reset mechanism 2-2 comprises an adjusting pin 2-7 and a reset clamping block 2-8; a clamping block 2-3 is fixed on the inner side of the front end of the main body 2 through a pin and is used for being matched with the pressurizing module 3; the main body is also provided with a circular through groove 2-5 for cleaning and sterilizing the apparatus after operation.
As shown in fig. 3 and 4, the pressurizing module 3 comprises a rack 3-1, a disc spring 3-2 and a pressurizing cylinder 3-3, wherein the pressurizing cylinder 3-3 is a hollow cylinder, and the disc spring 3-2 is radially arranged in the pressurizing cylinder 3-3; the end part of the disc spring 3-2 is connected with a rack 3-1; the rack 3-1 is meshed with the clamping block 2-3 at the front end of the main body 2 and is inserted into the cavity of the main body 2, so that the main body 2 is connected with the pressurizing module 3; when the pressing device is used, the pressing handle 2-1 is pressed to drive the clamping block 2-3 and the rack 3-1 to generate displacement, so that the disc spring 3-2 deforms in the pressing cylinder 3-3, a pressing effect is generated, and when the pressing handle 2-1 is restored, the pressing cylinder 3-3 of the pressing module 3 plays a role in resetting and guiding the disc spring 3-2.
As shown in fig. 10, a scale mark 6 is arranged outside the pressurizing cylinder 3-3, and the scale mark is in a unit of 10KG, so that the magnitude of the tension value applied to the cable in the pressurizing and bundling process is marked, and a user is assisted in judging the firmness of bundling.
FIGS. 5, 6 and 7 are schematic views showing the structure of the front locking mechanism assembly, wherein the front cable locking mechanism 4 comprises a connector 4-1 and a connector head 4-2, and the end part of the connector head 4-2 is inserted into a connector sleeve 4-3; the tail part of the connector 4-2 is bent, so that the surgical operation of different parts is facilitated; the connector 4-1 is composed of a connector body 4-4, a pre-locking handle 4-5 and a quick connector plug 4-6, wherein the quick connector plug 4-6 is arranged at the front end of the connector body 4-4 so as to be disassembled and assembled with the quick connector 2-4 on the main body 2; the pre-locking handle 4-5 is movably connected with the connector body 4-4 through a pin, and the pre-locking handle 4-5 rotates around the connecting part with the pin as the center so as to perform pre-locking of the cable. The front locking mechanism is a pre-locking mechanism, and a plurality of cables can be simultaneously fixed for pre-locking before pressurization. The cable passes through the elbow 4-2 and the connector 4-1, then connects the two, and then penetrates into the main body 2 to be connected with the main body. The elbow design is convenient for complicated human skeleton structure, is convenient for the operation of the different positions of doctor's operation in-process, and is simple and convenient, makes the operation efficiency improve.
The pre-locking comprises primary pre-locking and secondary pre-locking, wherein the primary pre-locking means that an included angle b between the pre-locking handle and the connector body is 180 degrees, and the secondary pre-locking means that an included angle b between the pre-locking handle and the connector body is 90 degrees.
Fig. 8 and 9 are schematic diagrams of the structure of the rear cable locking mechanism assembly, the rear cable locking mechanism 5 comprises a rear cable body 5-1, a U-shaped groove 5-2, an inner sleeve 5-3, a locking handle 5-4 and a cylindrical spring 5-5, the rear cable locking body 5-1 is a hollow component, a cable guide channel 5-6 penetrating the whole rear cable locking body is arranged in the middle of the rear cable locking body 5-1, the tail end of the rear cable locking body 5-1 is provided with the hollow inner sleeve 5-3, the U-shaped groove 5-2 is arranged at the inner sleeve end 5-3, and the cylindrical spring 5-5 is fixed on the upper part of the U-shaped groove 5-2 through a pin; the lower end of the U-shaped groove 5-2 is movably connected with a locking handle 5-4 through a pin, the locking handle 5-4 rotates around the U-shaped groove 5-2 by taking the pin as the center, drives the U-shaped groove 5-2 to longitudinally displace in the inner sleeve 5-3, and simultaneously compresses the cylindrical spring 5-5, so that a cable is meshed in a tooth slot of the inner sleeve 5-3 to perform a locking function of a first gear or a second gear, and when the U-shaped groove 5-2 is reset by the elasticity of the cylindrical spring 5-5; the front end of the rear cable locking mechanism 5 is inserted into the tail end of the pressurizing module 3, so that the rear cable locking mechanism 5 is connected with the pressurizing module 3.
The rear cable locking mechanism 5 is provided with a first-stage gear and a second-stage gear, and can lock the cable by changing different gears according to different cable diameters. The primary gear means that an included angle a between the locking handle and the U-shaped groove is 180 degrees, and at the moment, the locking handle 5-4 is perpendicular to the rear locking cable body 5-1; the secondary gear means that an included angle a between the locking handle and the U-shaped groove is 90 degrees, and at the moment, the locking handle 5-4 is parallel to the rear locking cable body 5-1. The cable sequentially passes through the front cable locking mechanism 4, the main body 2 and the pressurizing module 3, and then is introduced into the rear cable locking mechanism 5, and the U-shaped groove 5-2 and the inner sleeve 5-3 are longitudinally and relatively displaced to engage and clamp the cable through the locking handle 5-4.