CN214073552U

CN214073552U - Medical screwdriver

Info

Publication number: CN214073552U
Application number: CN202022719178.5U
Authority: CN
Inventors: 赵天明; 曹洁武
Original assignee: Changzhou Kanghui Medical Innovation Co Ltd
Current assignee: Changzhou Kanghui Medical Innovation Co Ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-08-31
Anticipated expiration: 2030-11-20

Abstract

The utility model relates to a medical bottle opener, including a shaft-like body to and be located the operating portion of shaft-like body one end, the operating portion has at least three wing piece, two side parallel arrangement of same wing piece, and has the angle of inclination between the axis of side and shaft-like body, and the recess of medical screw can be stretched into in the front of wing piece. The utility model discloses simple structure to can make the both sides side of wing piece contradict with the both sides medial surface of cross recess respectively, thereby increase the complex fastness of locking bottle opener and medical screw, realize holding the function of getting medical screw.

Description

Medical screwdriver

Technical Field

The utility model belongs to the technical field of orthopedics medical instrument, concretely relates to medical bottle opener.

Background

The medical screwdriver is a tool commonly used in orthopedic surgery and has the function of fastening the medical screw to an implant such as an internal fixing steel plate or directly fixing the medical screw to a human bone. The locking screwdriver can firmly hold and take the medical screw during the operation is an important function, the medical screw is ensured not to be separated from the screwdriver and fall into an operation incision during the operation, and particularly in a minimally invasive small incision operation, the medical screw is difficult to take out after being placed into the incision, so that extra risks are brought to the operation.

In order to reduce the operation time, the operation tool is small as possible, is convenient to be used for a small operation incision and cannot block the operation view of a doctor. The traditional locking screwdriver has a complex structure in order to realize the holding and taking functions, and brings inconvenience to the operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a medical bottle opener to solve locking bottle opener structure complicacy, hold and get the poor problem of effect.

The utility model discloses a medical bottle opener is realized like this:

a medical screwdriver comprises a rod-shaped body and an operating part positioned at one end of the rod-shaped body, wherein the operating part is provided with at least three wing blocks, two side surfaces of the same wing block are arranged in parallel, an inclination angle is formed between the side surfaces and the axis of the rod-shaped body, and the front surface of each wing block can extend into a groove of a medical screw.

Further, the operating part is provided with four wing blocks which are distributed in a cross shape.

Furthermore, a boss extending downwards is arranged on the outer side of the front face of the wing block, and the inner side face of the boss is an inclined plane.

Further, the inclination angle alpha is 2-6 degrees.

Furthermore, an inward concave transition cambered surface is arranged above the side surface of one side of the wing block in the inclination direction.

Furthermore, a cambered surface chamfer I is arranged at the corner between the inner side surface of the boss and the bottom surface of the wing block;

and an arc surface chamfer II is arranged on the outer side surface of the boss.

Furthermore, a handle part is arranged at the other end of the rod-shaped body, and handle part grooves with the length direction being the same as the axial direction of the handle part are uniformly arranged on the outer annular surface of the handle part.

Furthermore, the inner wall of the groove of the handle part is of a concave cambered surface structure, and the axial direction of the cambered surface structure is parallel to the axial direction of the handle part.

Further, a transition step is arranged between the handle part and the rod-shaped body.

Further, an annular groove is formed in the handle.

After the technical scheme is adopted, the utility model discloses the beneficial effect who has does:

the utility model provides a medical bottle opener simple structure to can be through the angle of inclination that sets up between two sides of wing piece and the shaft-like body, when coordinating with medical screw, make the side of wing piece contradict with the medial surface of medical screw recess, thereby increase bottle opener and medical screw complex fastness, realize holding the function of getting medical screw.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a structural view of a medical driver according to a preferred embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a front view of a medical driver according to a preferred embodiment of the present invention;

FIG. 4 is an enlarged view of portion B of FIG. 3;

FIG. 5 is a view showing the structure of the medical driver and the medical screw according to the preferred embodiment of the present invention;

FIG. 6 is a structural view of a medical screw to which the present invention is applied;

in the figure: the medical screw comprises a rod-shaped body 11, a handle 12, an operating part 13, a wing block 14, a boss 15, a side surface 16, a front surface 17, a transition arc surface 18, an arc surface chamfer I19, an arc surface chamfer II 110, a handle groove 111, a transition step 112, an annular groove 113, a medical screw 2, a screw body 21, a screw head 22, a cross-shaped groove 23, an upper step surface 24 and a lower slope surface 25.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 6, for the medical screw 2 suitable for the medical screw driver disclosed in this embodiment, the top of the medical screw 2 is a cross head, which includes a screw body 21 and a screw head 22 disposed at the top end of the screw body 21, a cross groove 23 is disposed on the screw head 22, the inner side surface of the cross groove 23 is a vertical plane, and the bottom of the cross groove 23 includes an upper step surface 24 disposed inside and a lower slope surface 25 disposed outside the upper step surface 24 and inclined downward.

As shown in fig. 1-5, a medical screwdriver comprises a rod-shaped body 11 and an operating part 13 located at one end of the rod-shaped body 11, wherein the operating part 13 has at least three wing blocks 14, two side surfaces 16 of the same wing block 14 are arranged in parallel, an inclined angle is formed between the side surfaces 16 and the axis of the rod-shaped body 11, and the front surface 17 of the wing block 14 can extend into a groove of a medical screw 2.

In this embodiment, the front surface 17 of the wing 14 extends into the cross-shaped groove 23 of the medical screw 2.

Since the medical screw 2 used in the present embodiment is a cross head, the operation portion 13 has four wings 14 arranged in a cross shape so as to fit into the cross groove 23.

In order to match with the lower slope surface 25 of the medical screw 2, the outer side of the front surface 17 of the wing block 14 is provided with a downward extending boss 15, and the inner side surface of the boss 15 is an inclined surface.

The inclination angle of the inner side surface of the boss 15 is the same as the inclination angle of the lower slope surface 25 of the medical screw 2, and when the screwdriver is matched with the medical screw 2, the two slope surfaces are attached to each other.

Only one side surface 16 of the wing block 14 of the existing medical screw driver is an inclined surface, so that when the medical screw 2 is matched, the medical screw 2 can be fixed only by means of the fact that the inclined surface side is abutted against the inner side surface of the groove of the medical screw 2, the screw holding effect is poor, the medical screw 2 can shake, in order to guarantee the self-holding effect, the two side surfaces 16 of the wing block 14 in the embodiment are both arranged in an inclined mode, and the inclination angle alpha of the wing block is 2-6 degrees.

The outer diameter of the operating part 13 is the same as that of the rod-shaped body 11, the wing blocks 14 are formed by cutting grooves at the end part of the rod-shaped body 11, and in order to increase the strength of the operating part 13 and avoid the problem that the wing blocks 14 deform or break when the medical screw 2 is screwed, a concave transition cambered surface 18 is arranged above one side surface 16 of the wing blocks 14 in the inclination direction.

In order to avoid the harm of edges and corners to medical staff or injuries and injuries when the screwdriver is used, a cambered surface chamfer I19 is arranged at the corner between the inner side surface of the boss 15 and the bottom surface of the wing block 14; the outer side surface 16 of the boss 15 is provided with an arc chamfer II 110.

The arrangement of the cambered surface chamfer can also increase the attractiveness of the screwdriver.

In order to facilitate the holding of the screwdriver, the other end of the rod-shaped body 11 is provided with a shank 12, and the outer annular surface of the shank 12 is uniformly provided with shank grooves 111 having the same length direction as the axial direction of the shank 12.

In the present embodiment, the shank grooves 111 are provided in three numbers and are uniformly distributed on the outer circumferential surface of the shank 12.

In order to increase the firmness of holding the screwdriver, the inner wall of the handle groove 111 is a concave arc structure, and the axial direction of the arc structure is parallel to the axial direction of the handle 12.

In order to ensure the small size of the screwdriver, the diameter of the rod-shaped body 11 is small, and in order to facilitate the use of the screwdriver by a doctor, the diameter of the handle 12 needs to be designed to be slightly larger, so that a transition step 112 is arranged between the handle 12 and the rod-shaped body 11 in order to increase the strength between the handle 12 and the rod-shaped body 11.

To facilitate engagement with the fixed jaw to form a stop, the shank 12 is provided with an annular recess 113.

As shown in fig. 5, when the medical screw 2 is matched with the screwdriver of the present embodiment, the four wing blocks 14 are correspondingly clamped into the cross-shaped groove 23, the side surface 16 on one side of the wing block 14 contacts with the top of the inner side surface on one side of the cross-shaped groove 23 to form a contact point a, the bottom of the side surface 16 on the other side of the wing block 14 contacts with the inner side surface on the other side of the cross-shaped groove 23 to form a contact point b, and at the two contact points, the wing block 14 can apply pressure to the inner side surface of the cross-shaped groove 23, so that the holding and taking functions of the medical screw 2 are realized, the stability of the matching between the two is ensured, and the problem of shaking of the medical screw 2 is avoided. When the medical screw 2 is attached, the medical screw 2 is rotated in a direction inclined toward the side surface 16 of the wing block 14, that is, in a state in which the medical screw 2 is fastened, and conversely, in a direction in which the medical screw 2 is detached.

In addition, the cross-shaped groove 23 of the medical screw 2 has a certain matching allowance in the depth, namely, the front surface 17 of the wing block 14 is not contacted with the upper step surface 24 of the cross-shaped groove 23 during the initial matching, so that the medical screw 2 can be held and taken. After long-term use, the operating part 13 of the screwdriver generates certain abrasion, so that the matching depth of the wing blocks 14 and the cross-shaped groove 23 can be increased, and the holding and taking effect of the screwdriver on the medical screw 2 is ensured. When the front surface 17 of the wing block 14 contacts with the upper step surface 24, the maximum matching of the screwdriver and the cross-shaped groove 23 of the medical screw 2 is realized.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A medical screw driver for operating a medical screw (2), which is characterized by comprising a rod-shaped body (11) and an operating part (13) positioned at one end of the rod-shaped body (11), wherein the operating part (13) is provided with at least three wing blocks (14), two side surfaces (16) of the same wing block (14) are arranged in parallel, an inclined angle is formed between each side surface (16) of each wing block (14) and the axis of the rod-shaped body (11), and the front surface (17) of each wing block (14) can extend into a groove of the medical screw (2).

2. Medical driver according to claim 1 characterized in that the operating part (13) has four wings (14) distributed in a cross.

3. The medical driver as claimed in claim 1 or 2, characterized in that the front face (17) of the wing block (14) is provided with a downwardly extending boss (15) outside, and the inner side face of the boss (15) is a bevel.

4. The medical driver as set forth in claim 1 wherein the inclination angle a is 2-6 degrees.

5. The medical driver as claimed in claim 1, characterized in that the wing block (14) is provided with a concave transition cambered surface (18) above the side surface (16) on one side in the inclined direction thereof.

6. The medical driver as claimed in claim 3, characterized in that the corner of the inner side surface of the boss (15) and the bottom surface of the wing block (14) is provided with a cambered chamfer I (19);

and an arc chamfer II (110) is arranged on the outer side surface (16) of the boss (15).

7. The medical driver as set forth in claim 1, wherein a shank (12) is provided at the other end of the rod-like body (11), and shank recesses (111) having the same length direction as the axial direction of the shank (12) are uniformly provided on the outer circumferential surface of the shank (12).

8. The medical driver as set forth in claim 7, characterized in that the inner wall of the shank recess (111) is a concave cambered structure whose axial direction is parallel to the axial direction of the shank (12).

9. The medical driver as set forth in claim 7, characterized in that a transition step (112) is provided between the handle (12) and the rod-like body (11).

10. The medical driver as set forth in claim 7, characterized in that an annular groove (113) is provided on the shank (12).