CN211512026U

CN211512026U - Device for taking out screw in bone

Info

Publication number: CN211512026U
Application number: CN201921883507.0U
Authority: CN
Inventors: 夏涛; 储传兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-09-18
Anticipated expiration: 2029-11-04

Abstract

The utility model discloses an overhead screw remove device, including connecting seat, chuck and fixed spanner, the upper end of chuck is through torsional spring axle movable mounting be in on the connecting seat, just the torsional spring is right the force messenger of chuck application of force the chuck lower extreme outwards opens, the chuck is total two, and is 180 symmetry settings and be in the both sides of connecting seat, the lower extreme a body coupling of chuck has the joint portion of inwards buckling, thereby makes two form between the joint portion and be used for carrying out the bayonet socket of chucking to the screw cap, it is right to install in the outside of chuck the adjustable ring that the opening size of bayonet socket was adjusted. Has the advantages that: through the adjusting ring with the inner conical shape, the two clamping heads which are separated outwards are folded towards the center, so that the center of the bayonet can be easily superposed with the central axis of the fixed wrench, and the operation is simpler and more convenient.

Description

Device for taking out screw in bone

Technical Field

The utility model relates to the field of medical equipment, concretely relates to screw remove device in bone.

Background

After the human body is fractured, most of the fractured parts need to be fixed by steel plates and screws, so that the fractured bones are butted together again under the action of external force and are gradually healed. The steel plates and screws often need to be removed after healing. The applicant finds that in the prior art, the bone nail extractor for orthopedics has the following application numbers: the Chinese patent of CN201710449394.2 specifically comprises the following contents: the bone nail extractor comprises a first top supporting seat, a second top supporting seat, a first supporting rod, a second supporting rod, a sliding track, a sliding seat, a driving cylinder, a folded positioning rod A, a folded positioning rod B and a rotating motor, wherein the lower end of a rotating shaft of the rotating motor is provided with a fastener, and the lower end of the fastener is detachably provided with a nail extracting head; a first transverse telescopic adjusting rod is arranged on the left side of the tightening device, a first longitudinal telescopic adjusting rod is arranged on one side of the first transverse telescopic adjusting rod, and a first clamping piece is arranged at the lower end of the first longitudinal telescopic adjusting rod; a second transverse telescopic adjusting rod is arranged on the right side of the tightening device, a second longitudinal telescopic adjusting rod is arranged on one side of the second transverse telescopic adjusting rod, and a second clamping piece is arranged at the lower end of the second longitudinal telescopic adjusting rod. Although the screw can be taken out of the patent, but two chucking spare are at the chucking in-process, need adjust two horizontal adjusting rod and two vertical adjusting rod respectively, the length inequality of two horizontal adjusting rod about, will cause the center of getting the pin fin to deviate the center of two chucking spares, make chucking spare can't carry out the chucking to the screw cap, and the length of two vertical adjusting rod is adjusted inequality, also will influence the joint of chucking spare to the screw cap, consequently, it is very inconvenient to use, maneuverability is relatively poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an overhead screw remove device just in order to solve above-mentioned problem, adjust simply, conveniently, maneuverability is good, can guarantee that the straight line at fixed spanner center pin place is located the center of running through the bayonet socket all the time.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides an in-bone screw taking-out device, including connecting seat, chuck and fixed spanner, the upper end of chuck is through torsional spring axle movable mounting on the connecting seat, and the torsional spring is right the force that the chuck exerted makes chuck lower extreme open outwards, the chuck is total two, and be 180 degrees symmetry setting in the both sides of connecting seat, the lower extreme of chuck is connected with the joint portion of buckling to the inboard below integratively, thereby make two form the bayonet socket that is used for chucking the screw cap between the joint portion, the outside of chuck is installed and is used for adjusting the adjustable ring of the opening size of bayonet socket;

a fixed wrench matched with the dismounting and mounting groove of the screw is arranged below the connecting seat, the fixed wrench can synchronously rotate along with the connecting seat, and the lower end of the fixed wrench extends into the centers of the two bayonets;

the top of the connecting seat is connected with a handle.

By adopting the device for taking out the screw in the bone, when the screw is taken out, the adjusting ring is moved towards one end of the connecting seat along the chucks, so that the lower ends of the two chucks are separated towards two sides, so as to ensure that the clamping parts can extend into the bottom of the screw cap, when the chucks are placed towards the lower part of the screw, the fixed wrench is inserted into the dismounting groove at the top of the screw cap, so that the two clamping parts extend towards two sides of the screw cap, the two clamping parts are simultaneously folded towards the center by moving the adjusting ring downwards, so as to be clamped into the bottom of the screw cap, then the pulling force of rotation and outward lifting is applied to the screw handle, so that the clamping parts outwards pull out the screw cap, meanwhile, as the fixed wrench is inserted into the dismounting groove of the screw cap, the clamping parts can be prevented from slipping during rotation, and the screw can be rotatably dismounted at the same time, simple operation and convenient use.

Preferably, the clamping portion is triangular, and a tip of the triangle faces the fixed wrench.

Preferably, the two side walls of the chuck deviating from each other are arc surfaces, the two arc surfaces located at the same horizontal height are two symmetrical arc surfaces on the same circle, external threads are machined on the arc surfaces, the adjusting ring is installed on the outer sides of the two chucks through the external threads, and the inner side of the adjusting ring and the threaded hole matched with the external threads are conical threaded holes.

Preferably, a locking ring is arranged above the adjusting ring, and the locking ring is mounted on the external thread through threads.

Preferably, the connecting base is circular, and the diameter of the circle is smaller than the diameter of the small conical end of the locking ring.

As preferred, the bottom an organic whole of connecting seat is connected with the center post, the spout of notch cuttype is seted up to the bottom of center post, just the opening of spout is down, the vertical slip of fixed spanner is pegged graft in the spout, it is right to install in the spout fixed spanner applys the spring of pushing force downwards, just fixed spanner's upper end an organic whole is connected with prevents changeing the boss, prevent changeing the boss and stretch into in the shoulder hole of spout, just it is located to prevent changeing the boss the below of spring, the spout with prevent changeing the shoulder stepped hole that connects and be regular hexagon hole, prevent changeing the appearance of boss and this regular hexagon shoulder hole phase-match.

Has the advantages that: the utility model discloses an adjustable ring of interior toper closes to the chuck of two outside separations to the center receipts to can make the center of bayonet socket very easily with fixed spanner's the central axis coincidence makes the operation simple more, convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a block diagram of the present invention;

fig. 2 is a plan view of the present invention.

The reference numerals are explained below:

1. a chuck; 101. a clamping part; 102. an external thread; 2. fixing a wrench; 201. an anti-rotation boss; 3. An adjusting ring; 4. locking a ring; 5. a torsion spring shaft; 6. a handle; 7. a connecting seat; 8. a central column; 801. A chute; 9. a spring; 10. and (4) a bayonet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides an inside-bone screw removing device, which includes a connecting seat 7, a collet 1 and a fixed wrench 2, wherein the upper end of the collet 1 is movably mounted on the connecting seat 7 through a torsion spring shaft 5, and the torsion spring applies force to the collet 1 to open the lower end of the collet 1 outwards, the collet 1 has two collets 1, which are symmetrically arranged at two sides of the connecting seat 7 at 180 °, the lower end of the collet 1 is integrally connected with a clamping portion 101 bent towards the lower side of the inner side, so that a bayonet 10 for clamping a screw cap is formed between the two clamping portions 101, and an adjusting ring 3 for adjusting the opening size of the bayonet 10 is mounted at the outer side of the collet 1;

a fixed wrench 2 matched with a screw dismounting groove is arranged below the connecting seat 7, the fixed wrench 2 can synchronously rotate along with the connecting seat 7, and the lower end of the fixed wrench 2 extends into the centers of the two bayonets 10;

the top of the connecting seat 7 is connected with a handle 6.

Preferably, the clamping portion 101 is triangular, and the tip of the triangle faces the fixed wrench 2, so that the clamping portion 101 can be inserted into the stud position of the bolt along the inclined plane of the bottom of the bolt cap, thereby increasing the contact width between the clamping portion 101 and the bolt cap and preventing the clamping portion 101 from falling off from the bolt cap.

Two the lateral wall that chuck 1 deviates from mutually is the cambered surface, and two cambered surfaces are located the pitch arc of same level and are two sections symmetrical circular arcs on same circle, and processing has external screw thread 102 on this cambered surface, adjustable ring 3 passes through external screw thread 102 is installed two the 1 outside of chuck, adjustable ring 3 inboard with external screw thread 102 complex screw hole is the toper screw hole, so sets up, is convenient for make adjustable ring 3 can be when following external screw thread 102 downwardly spinning, can receive chuck 1 bottom inwards to close to make bayonet 10 width reduce, guarantee that two joint portions 101 can follow the block of bolt cap both sides in its bottom.

Adjusting ring 3 top is equipped with locking ring 4, just locking ring 4 passes through the screw thread to be installed on the external screw thread 102, so set up, be convenient for adjust the completion back at adjusting ring 3 to joint portion 101, with locking ring 4 and tightly in adjusting ring 3 top, avoid when the screw is dismantled, adjusting ring 3 is not hard up, leads to joint portion 101 to deviate from the cap of bolt bottom.

The connecting seat 7 is circular, and the diameter of the circle is smaller than the diameter of the small conical end hole of the locking ring 4, so that the locking ring 4 and the adjusting ring 3 can be conveniently and downwards arranged outside the chuck 1 from the upper part of the connecting seat 7.

The bottom of the connecting seat 7 is integrally connected with a center post 8, the bottom of the center post 8 is provided with a stepped sliding groove 801, the opening of the sliding groove 801 faces downwards, the fixed wrench 2 is vertically inserted into the sliding groove 801 in a sliding manner, the sliding groove 801 is internally provided with a spring 9 for applying downward pushing force to the fixed wrench 2, the upper end of the fixed wrench 2 is integrally connected with an anti-rotation boss 201, the anti-rotation boss 201 extends into a stepped hole of the sliding groove 801, the anti-rotation boss 201 is positioned below the spring 9, the center post 8 comprises an upper section and a lower section, the upper section and the lower section are separated by the stepped part of the sliding groove 801, after the anti-rotation boss 201 at the top of the fixed wrench 2 is arranged in the sliding groove 801, a sealing plate at the lower section of the center post 8 is welded at the bottom of a central post upper section column, so that the fixed wrench 2 can slide up, spout 801 with the shoulder hole that prevents changeing boss 201 and connect is regular hexagon hole, the appearance that prevents changeing boss 201 matches with this regular hexagon shoulder hole, so sets up, is convenient for make fixed spanner 2 can reciprocate to conveniently insert fixed spanner 2 in the dismouting inslot of screw cap, guarantee simultaneously to dismantle the in-process, fixed spanner 2 can be along with 1 synchronous revolution of chuck, thereby applys spiral dismantlement power to the screw, guarantees that the screw can be demolishd.

By adopting the structure, when taking the screw, the adjusting ring 3 is firstly moved towards one end of the connecting seat 7 along the chuck 1, so that the lower ends of the two chucks 1 are separated towards two sides, so as to ensure that the clamping parts 101 can extend into the bottom of the screw cap, when the chuck 1 is placed towards the lower part of the screw, the fixed wrench 2 is inserted into the dismounting groove at the top of the screw cap, so that the two clamping parts 101 extend towards two sides of the screw cap, the two clamping parts 101 are simultaneously folded towards the center by moving the adjusting ring 3 downwards, so as to be clamped into the bottom of the screw cap, then the pulling force for rotating and lifting the screw is applied to the handle 6, so that the clamping parts 101 pull the screw cap outwards, meanwhile, because the fixed wrench 2 is inserted into the dismounting groove of the screw cap, the clamping parts 101 can be prevented from slipping during rotation, and the screw can be rotatably dismounted at the same time, simple operation and convenient use.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides an inside stud remove device of bone which characterized in that: the clamping device comprises a connecting seat, two clamping heads and a fixed spanner, wherein the upper ends of the clamping heads are movably mounted on the connecting seat through torsion spring shafts, the torsion springs apply force to the clamping heads to enable the lower ends of the clamping heads to be outwards opened, the two clamping heads are symmetrically arranged on two sides of the connecting seat by 180 degrees, the lower ends of the clamping heads are integrally connected with clamping parts which are inwards bent, so that a bayonet for clamping a screw cap is formed between the two clamping parts, and an adjusting ring for adjusting the opening size of the bayonet is mounted on the outer side of each clamping head;

the top of the connecting seat is connected with a handle.

2. The device for removing screws from inside of a bone according to claim 1, wherein: the clamping portion is triangular, and the tip of the triangle faces the fixed wrench.

3. The device for removing screws from inside of bones of claim 2, wherein: two the lateral wall that the chuck deviates from mutually is the cambered surface, and two cambered surfaces are located the pitch arc of same level and are two sections symmetrical circular arcs on same circle, and it has the external screw thread to process on this cambered surface, the adjustable ring passes through the external screw thread is installed two the chuck outside, the adjustable ring inboard with thread fit's screw hole is conical thread hole.

4. An intrabony screw extraction device according to claim 3, wherein: and a locking ring is arranged above the adjusting ring and is installed on the external thread through threads.

5. The device for removing screws from inside of a bone according to claim 4, wherein: the connecting seat is circular, and the diameter of the circle is smaller than the aperture of the small conical end of the locking ring.

6. The device for removing screws from inside of a bone according to claim 1, wherein: the bottom an organic whole of connecting seat is connected with the center post, the spout of notch cuttype is seted up to the bottom of center post, just the opening of spout is down, the vertical slip of fixed spanner is pegged graft in the spout, it is right to install in the spout be used for fixed spanner applys the spring of pushing force downwards, just fixed spanner's upper end an organic whole is connected with prevents changeing the boss, prevent changeing the boss and stretch into in the shoulder hole of spout, just prevent changeing the boss and be located the below of spring, the spout with prevent changeing the shoulder stepped hole that connects and be regular hexagon hole, prevent changeing the appearance of boss and this regular hexagon shoulder hole phase-match.