CN213372419U

CN213372419U - Orthopedic screw driver and orthopedic screw

Info

Publication number: CN213372419U
Application number: CN202021077267.8U
Authority: CN
Inventors: 张小兵; 张淼; 张崎喆
Original assignee: Tinavi Medical Technologies Co Ltd
Current assignee: Tinavi Medical Technologies Co Ltd; Beijing Tinavi Medical Technology Co Ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-06-08
Anticipated expiration: 2030-06-11

Abstract

The utility model relates to an orthopedics screw is beaten and is pulled out ware and orthopedics screw. Orthopedics screw extractor includes: the end face of the first end of the main body rod is provided with a mounting hole, and the side wall of the mounting hole is provided with a plurality of notches; one end of the clamping jaw of the elastic clamp is connected with the ring sleeve, the other end of the clamping jaw is a clamping end, the elastic clamp is sleeved on the main body rod through the ring sleeve, and the clamping end of the clamping jaw corresponds to the opening; the stepped hole comprises a large-diameter part and a small-diameter part, the large-diameter part is slidably sleeved on the ring sleeve, and the clamping end is used for clamping an annular groove of the orthopedic screw under the condition that the small-diameter part presses the clamping end of the clamping jaw; the plugging cap is sleeved on the main body rod and connected with the end part of the large-diameter part of the sleeve, and the sleeve is limited to move towards the first end of the main body rod under the condition that the plugging cap butts against the ring sleeve; and a locking member for holding the small diameter portion of the sleeve against the gripping ends of the jaws. The orthopedic screw driver and the orthopedic screw extractor can realize the driving and the extraction of the orthopedic screw, and are convenient for doctors to use.

Description

Orthopedic screw driver and orthopedic screw

Technical Field

The utility model relates to the field of medical equipment, especially, relate to an orthopedics screw is beaten and is pulled out ware and orthopedics screw.

Background

In the process of orthopedic surgery, screw positioning or screw fixing is often used, and orthopedic screws need to be taken out after being used for a period of time. Different instruments are usually used for assisting in the process of driving and extracting the screw, the screw is generally clamped by a clamping forceps, the screw is driven into the bone surface through a bone hammer, and the screw driven into the bone surface is extracted through a screw taking forceps. The screw is required to be used by various instruments in the processes of driving in and pulling out, so that the use complexity is increased, and the operation of a doctor is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an orthopedics screw is beaten and is pulled out ware and orthopedics screw, the function of squeezing into and extracting out of the integrated orthopedics screw of orthopedics screw is beaten and is pulled out ware simultaneously, makes things convenient for doctor's operation.

An embodiment of the utility model provides an orthopedic screw is beaten and is pulled out ware, include: the main body rod comprises a first end and a second end which are opposite, and a mounting hole is formed in the end face of the first end; the elastic clamp comprises a ring sleeve and a plurality of clamping jaws, one end of each clamping jaw is connected with the ring sleeve, the other end of each clamping jaw is a clamping end, and the elastic clamp is sleeved on the main body rod through the ring sleeve; the sleeve comprises a stepped hole, the stepped hole comprises a large-diameter part and a small-diameter part, the large-diameter part is sleeved on the annular sleeve in a sliding mode, and the small-diameter part enables the clamping end to clamp an annular groove of the orthopedic screw under the condition that the clamping end of the clamping jaw is pressed; the blocking cap is sleeved on the main body rod and connected with the end part of the large-diameter part of the sleeve, and the sleeve is limited to move towards the first end of the main body rod under the condition that the blocking cap is propped against the ring sleeve; a retaining member for maintaining the small diameter portion of the sleeve against the gripping end of the jaw.

According to some embodiments of the utility model, the outer wall of clamping jaw exposed core extends first boss, first boss is close to the side of ring cover is the inclined plane, the inner wall of clamping jaw exposed core is equipped with the clamping part, the path part is pushed down under the condition of first boss, orthopedics screw can be carried to the clamping part.

According to some embodiments of the present invention, the clamping jaw is connected to an inner wall of the ring sleeve, and a clamping jaw groove corresponding to the clamping jaw is formed on an outer wall of the main body rod; the side wall of the mounting hole is provided with a plurality of notches, and when the clamping jaw contracts, the clamping end penetrates through the notches to clamp the annular groove of the orthopedic screw.

According to some embodiments of the present invention, the outer wall of the main body rod extends a second boss, the second boss cooperating with the small diameter portion of the sleeve for guiding the sleeve.

According to some embodiments of the utility model, the retaining member is the elastic component, the retaining member set up in telescopic major-diameter portion, one end supports the ring cover, and the other end supports the shoulder of shoulder hole.

According to the utility model discloses a some embodiments, set up first pinhole on the main part pole, set up on the ring cover with the second pinhole that first pinhole corresponds, first pin penetrates first pinhole and second pinhole.

According to some embodiments of the utility model, the orthopedic screw driver further comprises a handle, the handle is sleeved on the main body rod and is close to the second end.

According to some embodiments of the invention, the cross-section of the gripping portion of the handle is square with rounded transition corners.

According to the utility model discloses a some embodiments, set up the third pinhole on the main part pole, set up on the handle with the fourth pinhole that the third pinhole corresponds, the second pin penetrates third pinhole and fourth pinhole.

According to some embodiments of the utility model, orthopedic screw driver still includes the striking head, the striking head set up in the second end of main part pole.

An embodiment of the utility model provides an orthopedic screw, including screw cap and screw post, be equipped with the ring channel on the outer wall of screw cap.

According to some embodiments of the invention, the tip of the screw post is triangular pyramid shaped.

According to some embodiments of the invention, the tail end of the screw cap is provided with a tapered recess.

According to some embodiments of the invention, the junction of the screw cap and the screw post is provided with a transitional cambered surface.

The utility model discloses an orthopedics screw is played and is pulled out ware, the mounting hole on the main part pole is used for placing orthopedics screw, and the axis that the main part pole can be followed to the sleeve slides, and when the sleeve pushed down the exposed core that elasticity pressed from both sides, the clamping jaw shrink, the ring channel of orthopedics screw can be carried to the exposed core, and the doctor realizes beating or extracting of orthopedics screw through operation orthopedics screw is played and is pulled out ware. When the sleeve does not press the clamping end of the elastic clamp, the clamping jaw is opened, and the orthopedic screw can be placed into the mounting hole or taken out of the mounting hole. The utility model discloses an instrument of orthopedics screw is played and is pulled out ware satisfies the demand of squeezing into or extracting out orthopedics screw, easy operation makes things convenient for the doctor to use.

Drawings

Fig. 1 is a first schematic view of the orthopedic screw of the present invention;

FIG. 2 is a second schematic view of the orthopedic screw of the present invention;

FIG. 3 is a third schematic view of the orthopedic screw of the present invention;

FIG. 4 is a schematic view of the orthopedic screw driver of the present invention;

FIG. 5 is an exploded view of the orthopedic screw driver of the present invention;

FIG. 6 is a cross-sectional view of the orthopedic screw driver of the present invention;

FIG. 7 is a schematic view of the orthopedic screw clamping device of the present invention;

FIG. 8 is a schematic view of the main body rod of the present invention;

fig. 9 is a schematic view of the mounting hole of the present invention;

fig. 10 is a schematic view of the spring clip of the present invention;

fig. 11 is a schematic view of the sleeve of the present invention;

fig. 12 is a cross-sectional view of the sleeve of the present invention;

fig. 13 is a schematic view of the plugging cap of the present invention;

fig. 14 is a schematic view of the clamping end of the elastic clamp of the present invention;

fig. 15 is a schematic view of the handle of the present invention;

FIG. 16 is a cross-sectional view of the handle gripping portion of the present invention;

fig. 17 is a schematic view of the striking head of the present invention.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it should be noted that unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection, either mechanically, electrically, or in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example 1

As shown in fig. 1 and 2, an embodiment of the present invention provides an orthopedic screw 100. Orthopedic screw 100 includes a screw cap 110 and a screw post 120. The outer wall of the screw cap 110 is provided with an annular groove 111. The annular groove 111 is arranged, so that the orthopedic screw driver can clamp the orthopedic screw 100, and the orthopedic screw 100 can be driven in or pulled out.

Optionally, the tip 121 of the screw post 120 is triangular pyramid shaped to facilitate driving of the orthopedic screw 100 into the bone surface.

As shown in fig. 3, according to an alternative embodiment of the present invention, the end face of the screw cap 110 is provided with a tapered recess 112. A tapered recess 112 is provided to facilitate probe insertion. The connection of the screw cap 110 and the screw column 120 adopts the transition of the cambered surface 130, which prevents the too large force for the driver to drive in the orthopedic screw 100 which is sunk too deep into the bone surface, is not beneficial to the extraction of the orthopedic screw 100, and also prevents the bone surface from being damaged unnecessarily by the orthopedic screw 100.

The orthopedic screw 100 of this embodiment is convenient for doctor's operation, and simple structure is fixed firm, and the doctor only needs simple the squeezing into and extracts through supporting orthopedic screw knockout ware, can accomplish the process of going up the nail and pulling out the nail.

Example 2

As shown in fig. 4-7, an embodiment of the present invention provides an orthopedic screw driver 200. Orthopedic screw extractor 200 includes main part pole 1, elasticity presss from both sides 2, sleeve 3, shutoff cap 4 and retaining member 5. The orthopedic screw 100 is held in the mounting hole of the main body rod 1 by the clamping of the elastic clamp 2, and the doctor can conveniently drive the orthopedic screw 100 into the bone surface or take the orthopedic screw 100 out by operating the orthopedic screw extractor 200.

As shown in fig. 8 and 9, the main body lever 1 includes opposite first and second ends 1a and 1 b. The end surface of the first end 1a is provided with a mounting hole 11. When using orthopedic screw extractor 200, orthopedic screw 100 is placed in mounting hole 11. The shape of the mounting hole 11 corresponds to the screw cap of the orthopaedic screw 100. Optionally, a plurality of gaps 111 are provided on the side wall of the mounting hole 11. The position of the opening 111 corresponds to the position of an annular groove on the screw cap. The number of the gaps 111 is matched with the number of the clamping jaws of the elastic clamp 2.

As shown in fig. 10, the spring clip 2 includes a collar 21 and a plurality of jaws 22. The ring sleeve 21 is annular, and the elastic clip 2 is sleeved on the main body rod 1 through the ring sleeve 21. The clamping jaw 22 is in the shape of an elongated bar, one end 22a of the clamping jaw 22 is connected with the ring sleeve 21, and the other end is a clamping end 22 b. The jaws 22 may be attached to the inner or outer wall of the collar 21 and may also be attached to the end face of the collar 21 adjacent the first end 1a of the body bar. The jaws 22 are allowed to deform to some extent, and when the gripping ends 22b are pressed, the gripping ends 22b of the plurality of jaws 22 are contracted and deformed in a substantially radial direction of the collar 21. The plurality of clamping jaws 22 are contracted simultaneously, so that the orthopedic screw 100 can be clamped. In this embodiment, the number of the holding jaws 22 is two, and the number of the holding jaws 22 may be increased as necessary. Optionally, a plurality of clamping jaws 22 are evenly distributed around the circumference of the ring sleeve 2.

As shown in fig. 11 and 12, the liner 3 is a rotator. The sleeve 3 includes a stepped bore 3 a. The stepped hole 3a includes a large-diameter portion 31 and a small-diameter portion 32 communicating with each other. The sleeve 3 is slidably fitted over the collar 21 by means of the large-diameter portion 31. The small diameter portion 32 is used to press the grip end 22b of the jaw 22. When the sleeve 3 slides towards the second end 1b of the main body rod 1, the small-diameter portion 32 is gradually separated from the clamping end 22b of the clamping jaw 22, the clamping jaw 22 is gradually opened, the clamping jaw 22 cannot play a role in clamping and limiting the orthopedic screw 100, and the orthopedic screw 100 can be placed into the mounting hole 11 or taken out of the mounting hole 11. When the sleeve 3 slides towards the first end 1a of the main body rod 1, the small diameter portion 32 contacts with the clamping end 22b of the clamping jaw 22 to press the clamping end 22b, and the clamping end 22b enters the annular groove 111 of the orthopedic screw to clamp the orthopedic screw 100. In this embodiment, the end of the large diameter portion 31 of the sleeve 3 extends outwardly to form a flange 33, which is convenient for a doctor to grip the sleeve 3 and operate the sleeve 3.

As shown in fig. 13, the plugging cap 4 is provided with a through hole 41 extending along the axis. The inner diameter of the through hole 41 is slightly larger than the diameter of the main body rod 1. The blocking cap 4 is slidably fitted over the main body rod 1 through the through hole 41. The plugging cap 4 is positioned on the side of the ring sleeve 21 close to the second end 1b, and the plugging cap 4 is fixedly connected with the end part of the large-diameter part 31 of the sleeve 3. The sleeve 3 drives the plugging cap 4 to slide. The inner diameter of the through hole 41 is smaller than the outer diameter of the collar 21 so that the sleeve 3 is restricted from further movement toward the first end 1b of the main body rod with the plugging cap 4 against the collar 21.

Optionally, in this embodiment, an inner thread 34 is provided on an inner wall of an end portion of the large diameter portion 31 of the sleeve 3, an outer thread is provided on the plugging cap 4, and the sleeve 3 and the plugging cap 4 are connected through a thread. Other connection modes can also realize the fixed connection of sleeve 3 and shutoff cap 4, like welding or gluing etc. this is not restricted by the utility model.

The locking piece 5 is used for keeping the small-diameter part 32 of the sleeve to press the clamping end 22b of the clamping jaw when in locking, so that the clamping jaw is kept in a state of clamping the orthopedic screw 100, and the orthopedic screw 100 is prevented from being separated from the orthopedic screw extractor 200 in the process of screwing or taking out the nail.

The orthopedic screw driver 200 of this embodiment, its simple structure realizes the centre gripping to orthopedic screw 100 through the cooperation of main part pole 1, elasticity clamp 2, sleeve 3, collects driving into and extracting in an organic whole of orthopedic screw 100. The doctor can satisfy the demand of squeezing into or extracting the orthopedics screw through an apparatus of orthopedics screw knockout, easy operation makes things convenient for the doctor to use.

As shown in fig. 14, according to an alternative embodiment of the present invention, the outer wall of the clamping jaw 22b extends out of the first boss 221, so that the thickness of the end of the clamping jaw 22b is greater than the thickness of the main body of the clamping jaw 22. The side 2211 of the first boss 221 close to the ring sleeve is an inclined surface, so that the first boss 221 is conveniently extruded in the sliding process of the sleeve 3. The inner wall of the jaw clamping end 22b is provided with a clamping portion 222. Under the condition that the small-diameter part 32 of the sleeve 3 presses the first boss 221, the clamping jaw 22 contracts, and the clamping part 222 enters the annular groove 111 of the orthopedic screw 100 through the notch 11, so that the orthopedic screw 100 is clamped. Alternatively, the port of the small diameter portion 32 of the sleeve 3 is provided with an inclined angle to cooperate with the side surface 2211 of the first boss 221, so that the sleeve 3 presses the first boss 221.

According to an alternative embodiment of the present invention, the clamping jaw 22 is connected to one end 22a of the ring sleeve 21. The outer wall of the main body rod 1 is provided with a clamping jaw groove 12 corresponding to the clamping jaw 22. In this embodiment, the diameter of the portion of the main rod 1 corresponding to the jaw 22 extending out of the ring 21 is equal to the diameter of the circumference of the jaw 22, i.e. the diameter of the portion of the main rod 1 corresponding to the jaw 22 extending out of the ring 21 is smaller than the diameter of the portion of the main rod 1 corresponding to the ring 21. The clamping jaw 22 is embedded in the clamping jaw groove 12, so that the structure of the orthopedic screw extractor 200 is more compact. Under the condition that the side wall of the mounting hole 11 is provided with the notch 111, when the clamping jaw 22 contracts, the clamping end 22b penetrates through the notch 111, and the orthopedic screw 100 is clamped.

According to an optional technical scheme of the utility model, the outer wall of main part pole 1 extends second boss 13, and second boss 13 is located ring cover 21 and main part pole 1's first end 1a between. The second projection 13 cooperates with the small diameter portion 32 of the sleeve to guide the sleeve 3. Optionally, a third boss 14 is disposed on the outer wall of the first end 1a of the main body rod 1 at a position corresponding to the first boss 221, which is beneficial to improving the strength of the main body rod 1.

According to an alternative embodiment of the present invention, the locking member 5 is an elastic member, and the locking member 5 is a spring in this embodiment. The locking member 5 is disposed in the large diameter portion 31 of the sleeve with one end abutting against the collar 21 and the other end abutting against the shoulder of the stepped hole 3 a. The physician manually slides the sleeve 3 towards the second end 1b of the body rod, the jaws 22 are opened and the spring is forced to compress. After the doctor removes the force applied to the sleeve 3, the spring pushes the sleeve 3 to slide toward the first end 1a of the main body rod, and the jaws 22 contract. Due to the spring force, the small diameter portion 32 of the sleeve remains pressed against the clamping end 22b of the jaw, so that the jaw remains in a state of clamping the orthopedic screw 100. When the locking member 5 is an elastic member, the surgeon can operate the orthopedic screw driver 200 with one hand.

In another alternative, the locking member 5 is a nut (not shown in the figures) and is disposed on the main body rod 1 by a threaded connection, and is located on a side of the plugging cap 4 close to the second end 1b of the main body rod 1. After the small diameter portion 32 of the sleeve is pressed against the holding end 22b of the holding jaw, the nut is rotated so that the nut comes into contact with the plugging cap 4, locking the sleeve 3 and the plugging cap 4. When the unlocking is needed, the nut is rotated reversely.

According to an optional technical solution of the present invention, the main body rod 1 is provided with a first pin hole 15 corresponding to the position of the ring sleeve 21. The ring sleeve 21 is provided with a second pin hole 211 corresponding to the first pin hole 15. The first pin 8 penetrates the first pin hole 15 and the second pin hole 211, and the main body rod 1 is connected with the elastic clamp 2. Other connection modes can be selected for the main body rod 1 and the elastic clamp 2 according to requirements.

As shown in fig. 15, the orthopedic screw driver 200 optionally further comprises a handle 6. The handle 6 has a through hole 61 extending along the axis. The handle 6 is fixedly sleeved on the main body rod 1 through the through hole 61 and is close to the second end 1 b. Handle 6 is provided to facilitate the surgeon's gripping of orthopedic screw extractor 200 for manipulation of orthopedic screw 100.

As shown in fig. 16, according to an alternative embodiment of the present invention, the cross section of the holding portion of the handle 6 is square with transition rounded corners. The cross-sectional shape of the gripping portion of the handle 6 is designed so as to facilitate smooth placement of the orthopedic screw driver 200 on a flat surface, preventing the orthopedic screw driver 200 from rolling.

According to an optional technical scheme of the utility model, the part of installation handle 6 on main part pole 1 sets up third pinhole 16. The handle 6 is provided with a fourth pin hole 62 corresponding to the third pin hole 16. The second pin 9 penetrates through the third pin hole 16 and the fourth pin hole 62, and the handle 6 is connected with the main body rod 1. Other connection modes of the handle 6 and the main body rod 1 can be selected according to requirements.

As shown in fig. 17, the orthopedic screw driver 200 optionally further comprises a striking head 7. The striking head 7 is fixedly disposed at the second end 1b of the main body rod through a coupling hole 71. The diameter of the striking head 7 is larger than that of the main body rod 1. When the bone screw 100 is driven, if the bone is compact and is difficult to implant by bare hands, the bone hammer can be used for knocking the knocking head 7, and then the bone screw 100 is knocked into the bone surface.

The process of driving the orthopedic screw 100 into the bone surface through the orthopedic screw driver 200 comprises the following steps: the surgeon pulls the sleeve 3 toward the second end 1b of the main body rod, the jaws 22 are opened, and the orthopedic screw 100 is fitted into the mounting hole 11 of the main body rod 1. The surgeon releases the sleeve 3, and the sleeve 3 returns to the original position due to the elastic force of the spring, and presses the clamping ends 22b of the clamping jaws 22, so that the plurality of clamping jaws 22 clamp the orthopedic screw 100. The surgeon may drive orthopedic screw 100 into the bone surface by hand using orthopedic screw driver 200. The orthopedic screw driver 200 can also be knocked by means of a bone hammer and the like, so that the orthopedic screw 100 can be driven into the bone surface more conveniently.

The process of extracting the orthopedic screw 100 through the orthopedic screw extractor 200 comprises the following steps: the surgeon pulls the sleeve 3 towards the second end 1b of the main body shaft, the jaws 22 are opened, and the screw cap of the orthopaedic screw 100 on the bone surface is inserted into the mounting hole 11 of the main body shaft 1. The surgeon releases the sleeve 3, and the sleeve 3 returns to the original position due to the elastic force of the spring, and presses the clamping ends 22b of the clamping jaws 22, so that the plurality of clamping jaws 22 clamp the orthopedic screw 100. The surgeon can pull out orthopedic screw 100 by bare hand through orthopedic screw extractor 200.

The orthopedic screw driver 200 of the present embodiment is matched with the orthopedic screw 100, so as to facilitate driving or removing the orthopedic screw 100 into or out of the bone surface. The orthopedic screw driver 200 is an instrument to realize driving or pulling out of the orthopedic screw, thereby facilitating the use of doctors.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An orthopedic screw extractor, comprising:

the main body rod comprises a first end and a second end which are opposite, and a mounting hole is formed in the end face of the first end;

the elastic clamp comprises a ring sleeve and a plurality of clamping jaws, one end of each clamping jaw is connected with the ring sleeve, the other end of each clamping jaw is a clamping end, and the elastic clamp is sleeved on the main body rod through the ring sleeve;

the sleeve comprises a stepped hole, the stepped hole comprises a large-diameter part and a small-diameter part, the large-diameter part is sleeved on the annular sleeve in a sliding mode, and the small-diameter part enables the clamping end to clamp an annular groove of the orthopedic screw under the condition that the clamping end of the clamping jaw is pressed;

the blocking cap is sleeved on the main body rod and connected with the end part of the large-diameter part of the sleeve, and the sleeve is limited to move towards the first end of the main body rod under the condition that the blocking cap is propped against the ring sleeve;

a retaining member for maintaining the small diameter portion of the sleeve against the gripping end of the jaw.

2. The orthopedic screw driver according to claim 1, wherein a first boss extends from the outer wall of the clamping jaw clamping end, the side surface of the first boss close to the ring sleeve is a slope, the inner wall of the clamping jaw clamping end is provided with a clamping portion, and the clamping portion can clamp the orthopedic screw when the small diameter portion presses the first boss.

3. The orthopedic screw driver according to claim 1, wherein the clamping jaw is connected to the inner wall of the ring sleeve, and the outer wall of the main body rod is provided with a clamping jaw slot corresponding to the clamping jaw;

the side wall of the mounting hole is provided with a plurality of notches, and when the clamping jaw contracts, the clamping end penetrates through the notches to clamp the annular groove of the orthopedic screw.

4. The orthopedic screw driver according to claim 1, wherein a second boss extends from the outer wall of the main body rod, the second boss cooperating with the small diameter portion of the sleeve for guiding the sleeve.

5. The orthopedic screw driver according to claim 1, wherein the locking member is an elastic member, and the locking member is disposed in the large diameter portion of the sleeve, and has one end abutting against the collar and the other end abutting against the shoulder of the stepped hole.

6. The orthopedic screw driver according to claim 1, wherein a first pin hole is provided on the main body rod, a second pin hole corresponding to the first pin hole is provided on the collar, and a first pin penetrates the first pin hole and the second pin hole.

7. The orthopedic screw driver according to claim 1, further comprising a handle sleeved on the main body shaft proximate to the second end.

8. The orthopedic screw driver according to claim 7, wherein a third pin hole is provided on the main body rod, a fourth pin hole corresponding to the third pin hole is provided on the handle, and a second pin penetrates the third pin hole and the fourth pin hole.

9. The orthopedic screw driver according to claim 1, further comprising a striking head disposed at the second end of the main body shaft.

10. An orthopedic screw matched with the orthopedic screw extractor of any one of claims 1-9, comprising a screw cap and a screw column, wherein the outer wall of the screw cap is provided with an annular groove;

the tip of the screw column is triangular pyramid; the tail end of the screw cap is provided with a conical groove; and a transitional cambered surface is arranged at the joint of the screw cap and the screw column.