CN216294235U - Novel multi-functional nail pulling device - Google Patents
Novel multi-functional nail pulling device Download PDFInfo
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- CN216294235U CN216294235U CN202122200350.0U CN202122200350U CN216294235U CN 216294235 U CN216294235 U CN 216294235U CN 202122200350 U CN202122200350 U CN 202122200350U CN 216294235 U CN216294235 U CN 216294235U
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Abstract
The utility model discloses a novel multifunctional nail pulling device, wherein three conical sliding blocks can slide up and down on three inclined sliding rails, the surfaces of the sliding blocks are ground surfaces, friction is increased, and the three conical sliding blocks can be mutually attached to the lowest part. The column core is positioned in the inner cylinder, the bottom of the column core can abut against the upper end of the sliding block, the sliding block can slide downwards by rotating the column core, and the bottom of the column core is also provided with a blind hole for accommodating the nail body. The tail end of the column core can be connected with a T-shaped wrench or a power drill, the outer surface of the inner cylinder is in rotary connection with the inner surface of the outer cylinder through right-handed thread matching threads, and the external threads on the outer surface of the column core are in rotary connection with the internal threads of the central hole of the inner cylinder through left-handed thread matching threads. The screw is rotated while being pulled upward.
Description
Technical Field
The utility model relates to medical auxiliary equipment, in particular to a novel multifunctional nail pulling device.
Background
With the improvement of living standard and the popularization of comprehensive body building, the incidence rate of fracture is higher and higher, the operation of fracture internal fixation surgery is increased year by year, and most cases need to be taken out and internally fixed after fracture healing. In internal fixation extraction, the most critical step is screw extraction. At present, most of internal fixing screws need to be taken out by a matched screwdriver, however, in part of patients, especially in young people, due to the fact that bone grows firmly or the screw part is corroded by the environment in the body, the screws slide and break in the taking-out process, and the taking-out difficulty is caused.
At present, the method for treating the smooth and broken screw is that a tungsten steel drill is used for grinding a connecting part with a steel plate in an operation, and after the steel plate is completely taken out, a trephine with a proper size is used for taking out together with a nail tip part.
Simultaneously, to the design characteristics of pulling force nail, because part young patient's cortical of bone is harder, and cancellous bone is pine, when pulling out the pulling force nail, screw thread can effectively interlock in the cancellous bone, can't attack out the screw on cortical of bone when nevertheless needing to break through cortical of bone, takes out the screw smoothly. This is the most common situation when taking out a plurality of femoral neck nails, and when this happens in the art, the assistant often utilizes tools such as pliers to pull up the screw with strength, and the art person reuses the screwdriver and rotates the screw, makes it tap the screw on the cortex of bone, takes out the screw. However, the method is time-consuming and labor-consuming, the success rate is low because the screw is acted by two directions, and after the method fails, the bone cortex around the screw is chiseled by the multipurpose osteotome, so that the bone injury is caused, and the recovery time of a patient is prolonged.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a novel multifunctional nail pulling device, which is a tool capable of rotating a screw while lifting the screw upwards and can effectively solve the problem.
The technical scheme of the utility model is as follows: a novel multifunctional nail pulling device comprises an outer cylinder, an inner cylinder and a cylinder core;
the outer cylinder is a cylindrical cylinder with internal threads;
the inner cylinder is a cylindrical cylinder with external threads, the length of the inner cylinder is greater than that of the outer cylinder, and the outer surface of the inner cylinder is rotationally connected with the inner surface of the outer cylinder through right-hand threads matched with the threads;
the bottom of the central hole of the inner cylinder is tapered and contracted to form a conical groove, the bottom of the conical groove is a hole capable of penetrating through the nail body, 3 inclined slide rails are uniformly arranged on the inner inclined plane of the conical groove, 1 conical slide block is embedded on each inclined slide rail, and the 3 conical slide blocks can be mutually attached and spliced to form a conical frustum structure when sliding from top to bottom to the bottom;
the middle part of the central hole of the inner cylinder is provided with an internal thread;
the column core comprises a small-diameter cylinder at the lower part and a large-diameter cylinder at the upper part, the outer surface of the large-diameter cylinder is provided with an external thread, and the external thread on the outer surface of the large-diameter cylinder is rotatably connected with the internal thread of the central hole of the inner cylinder through a left-handed thread matching thread; the diameter of the small-diameter cylinder is smaller than or equal to the circular diameter of the bottom surface of a truncated cone structure formed by splicing 3 conical sliding blocks, and when the column core rotates and moves downwards from the inner cylinder, the bottom surface of the small-diameter cylinder can abut against the top surfaces of the 3 conical sliding blocks and push the sliding blocks to slide downwards;
a blind hole capable of accommodating the nail body is formed in the center of the bottom surface of the column core;
and the top of the column core is provided with a connecting rod which can be connected with a power device.
Furthermore, the inner cylinder is detachably and fixedly connected with the body through a base, and the conical groove is positioned in the base. When not in use, the sliding blocks can be separated, and the sliding blocks with different sizes are convenient to clean and replace.
Further, the base and the body are fixedly connected into a whole through threads.
Further, the power device is a wrench or a power drill.
Further, the inner surface of the conical sliding block is a grinding surface. The friction force in contact with the nail body can be increased.
Furthermore, the blind holes are ball bottoms. Is convenient for cleaning.
The utility model has the beneficial effects that: three conical sliding blocks can slide up and down on three inclined sliding rails, the surfaces of the sliding blocks are ground surfaces, friction is increased, and when the sliding blocks are at the lowest part, the three conical sliding blocks can be attached to each other. The column core is positioned in the inner cylinder, the bottom of the column core can abut against the upper end of the sliding block, the sliding block can slide downwards by rotating the column core, and the bottom of the column core is also provided with a blind hole for accommodating the nail body. The tail end of the column core can be connected with a T-shaped wrench or a power drill, the outer surface of the inner cylinder is in rotary connection with the inner surface of the outer cylinder through right-handed thread matching threads, and the external threads on the outer surface of the column core are in rotary connection with the internal threads of the central hole of the inner cylinder through left-handed thread matching threads.
When the screw tail cap is broken or slips, the bottom surface of the inner cylinder of the device is attached to the bone surface and is nested at the broken screw stub, the outer surface of the inner cylinder is held by a left hand, the column core is rotated by a right hand, the column core downwards extrudes the sliding blocks, the three sliding blocks downwards slide to extrude the screw stub, the clamping force is increased, the rotating direction of the right hand is consistent with the screw withdrawing direction, and the effects of clamping the screw and withdrawing the screw outwards are achieved. When the sliding block slides to a certain balance point and cannot move, the surface of the outer barrel is immediately held by the left hand, the outer barrel is connected with the inner barrel through left-handed threads (opposite to connecting threads of the column core and the inner barrel), when the inner barrel rotates inwards, the outer barrel rotates outwards, so that the outer barrel is held to abut against a bone surface, and when a wrench or a power drill is rotated, the inner barrel drives the screw to withdraw backwards until the broken screw is completely taken out. The operation flow is also suitable for the process that the tension nail can not be taken out from the bone surface, the rotation and the outward pulling force are taken into consideration, great convenience is brought to the operator, time and labor are saved, the damage to the bone of the patient is reduced, and the clinical practical value is realized.
Drawings
FIG. 1 is a schematic view of the overall structure of the multifunctional nail pulling device in embodiment 1;
FIG. 2 is a schematic view of the structure of the outer cylinder in embodiment 1;
FIG. 3 is a schematic view of an inner cylinder structure in embodiment 1;
FIG. 4 is a schematic view of a pillar core structure in example 1;
FIG. 5 is an enlarged schematic view of the bottom of the inner cylinder in example 1;
FIG. 6 is a schematic view of the overall structure of the multifunctional nail pulling device in embodiment 2;
FIG. 7 is a schematic view of an inner cylinder structure in embodiment 2.
In the figure: the device comprises an outer barrel 1, an inner barrel 2, a column core 3, a power device 4, a conical groove 21, a hole 22, a conical sliding block 23, a base 24, a body 25, a small-diameter cylinder 31, a large-diameter cylinder 32, a blind hole 33 and a connecting rod 34.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
Example 1
As shown in figures 1-5, a novel multifunctional nail pulling device comprises an outer cylinder 1 shown in figure 2, an inner cylinder 2 shown in figure 3 and a column core 3 shown in figure 4. The outer cylinder 1 is a cylindrical cylinder with internal threads.
The inner cylinder 2 is a cylindrical cylinder with external threads, the length of the inner cylinder 2 is greater than that of the outer cylinder 1, and the outer surface of the inner cylinder is rotatably connected with the inner surface of the outer cylinder through right-hand threads matched with the threads. As shown in fig. 5, the bottom of the central hole of the inner cylinder 2 is tapered and contracted to form a conical groove 21, the bottom of the conical groove 21 is a hole 22 capable of penetrating through the nail body, 3 inclined slide rails are uniformly arranged on the inner inclined surface of the conical groove 21, 1 conical slide block 23 is embedded on each inclined slide rail, and the 3 conical slide blocks 23 can be mutually attached and spliced into a conical frustum structure when sliding to the bottom from top to bottom. And the inner surface of the conical sliding block 23 is a grinding surface. The friction force in contact with the nail body can be increased. And the middle part of the central hole of the inner cylinder 2 is provided with an internal thread.
The column core 3 comprises a small-diameter cylinder 31 at the lower part and a large-diameter cylinder 32 at the upper part, external threads are arranged on the outer surface of the large-diameter cylinder 32, and the external threads on the outer surface of the large-diameter cylinder 32 are rotatably connected with the internal threads of the central hole of the inner cylinder 2 through left-hand threads and matching threads. The diameter of the small-diameter cylinder 31 is smaller than or equal to the circular diameter of the bottom surface of a truncated cone structure formed by splicing 3 conical sliding blocks, and when the column core 3 rotates and moves downwards from the inner cylinder, the bottom surface of the small-diameter cylinder 31 can abut against the top surfaces of the 3 conical sliding blocks and push the sliding blocks to slide downwards. The center of the bottom surface of the column core 3 is provided with a blind hole 33 capable of accommodating the nail body. The blind hole 33 is a ball bottom. Is convenient for cleaning. The top of the column core 3 is provided with a connecting rod 34 which can be connected with the power device 4. The power device 4 is a wrench or a power drill.
Three conical sliding blocks can slide up and down on three inclined sliding rails, the surfaces of the sliding blocks are ground surfaces, friction is increased, and when the sliding blocks are at the lowest part, the three conical sliding blocks can be attached to each other. The column core is positioned in the inner cylinder, the bottom of the column core can abut against the upper end of the sliding block, the sliding block can slide downwards by rotating the column core, and the bottom of the column core is also provided with a blind hole for accommodating the nail body. The tail end of the column core can be connected with a T-shaped wrench or a power drill, the outer surface of the inner cylinder is in rotary connection with the inner surface of the outer cylinder through right-handed thread matching threads, and the external threads on the outer surface of the column core are in rotary connection with the internal threads of the central hole of the inner cylinder through left-handed thread matching threads.
When the screw tail cap is broken or slips, the bottom surface of the inner cylinder of the device is attached to the bone surface and is nested at the broken screw stub, the outer surface of the inner cylinder is held by a left hand, the column core is rotated by a right hand, the column core downwards extrudes the sliding blocks, the three sliding blocks downwards slide to extrude the screw stub, the clamping force is increased, the rotating direction of the right hand is consistent with the screw withdrawing direction, and the effects of clamping the screw and withdrawing the screw outwards are achieved. When the sliding block slides to a certain balance point and cannot move, the surface of the outer barrel is immediately held by the left hand, the left-hand thread connection between the outer barrel and the inner barrel is opposite to the connection thread of the column core and the inner barrel, when the inner barrel rotates inwards, the outer barrel rotates outwards, so that the outer barrel is held to abut against the bone surface, and when a wrench or a power drill is rotated, the inner barrel drives the screw to withdraw backwards until the broken screw is completely taken out. The operation flow is also suitable for the process that the tension nail can not be taken out from the bone surface, the rotation and the outward pulling force are taken into consideration, great convenience is brought to the operator, time and labor are saved, the damage to the bone of the patient is reduced, and the clinical practical value is realized.
Example 2
As in embodiment 1, the inner cylinder 2 is detachably and fixedly connected to the base 24 and the body 25, and the conical groove 21 is formed in the base 24. When not in use, the sliding blocks can be separated, and the sliding blocks with different sizes are convenient to clean and replace. Preferably, the base 24 and the body 25 are fixedly connected into a whole by screw threads as shown in fig. 6 and 7.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The utility model provides a novel multi-functional nail pulling device which characterized in that: comprises an outer cylinder (1), an inner cylinder (2) and a column core (3);
the outer cylinder (1) is a cylindrical cylinder with internal threads;
the inner cylinder (2) is a cylindrical cylinder with external threads, the length of the inner cylinder (2) is greater than that of the outer cylinder (1), and the outer surface of the inner cylinder is rotationally connected with the inner surface of the outer cylinder through right-hand threads matched with the threads;
the bottom of a central hole of the inner cylinder (2) is tapered and contracted to form a conical groove (21), the bottom of the conical groove (21) is a hole (22) capable of penetrating through the nail body, 3 inclined slide rails are uniformly arranged on the inner inclined plane of the conical groove (21), 1 conical slide block (23) is embedded on each inclined slide rail, and the 3 conical slide blocks (23) can be mutually attached and spliced into a conical frustum structure when sliding from top to bottom to the bottom;
the middle part of the central hole of the inner cylinder (2) is provided with an internal thread;
the column core (3) comprises a small-diameter cylinder (31) at the lower part and a large-diameter cylinder (32) at the upper part, external threads are arranged on the outer surface of the large-diameter cylinder (32), and the external threads on the outer surface of the large-diameter cylinder (32) are in rotary connection with the internal threads of the central hole of the inner cylinder (2) through left-hand thread matching threads; the diameter of the small-diameter cylinder (31) is smaller than or equal to the circular diameter of the bottom surface of a truncated cone structure formed by splicing 3 conical sliding blocks, and when the column core (3) rotates and moves downwards from the inner cylinder, the bottom surface of the small-diameter cylinder (31) can abut against the top surfaces of the 3 conical sliding blocks and push the sliding blocks to slide downwards;
a blind hole (33) capable of accommodating the nail body is formed in the center of the bottom surface of the column core (3);
and the top of the column core (3) is provided with a connecting rod (34) which can be connected with a power device (4).
2. The novel multifunctional nail pulling device according to claim 1, is characterized in that: the inner cylinder (2) is detachably and fixedly connected with the body (25) through a base (24), and the conical groove (21) is positioned in the base (24).
3. The novel multifunctional nail pulling device according to claim 2, characterized in that: the base (24) and the body (25) are fixedly connected into a whole through threads.
4. The novel multifunctional nail pulling device according to claim 1, is characterized in that: the power device (4) is a wrench or a power drill.
5. The novel multifunctional nail pulling device according to claim 1, is characterized in that: the inner surface of the conical sliding block (23) is a grinding surface.
6. The novel multifunctional nail pulling device according to claim 1, is characterized in that: the blind hole (33) is a ball bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122200350.0U CN216294235U (en) | 2021-09-13 | 2021-09-13 | Novel multi-functional nail pulling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122200350.0U CN216294235U (en) | 2021-09-13 | 2021-09-13 | Novel multi-functional nail pulling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216294235U true CN216294235U (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122200350.0U Active CN216294235U (en) | 2021-09-13 | 2021-09-13 | Novel multi-functional nail pulling device |
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|---|---|
| CN (1) | CN216294235U (en) |
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2021
- 2021-09-13 CN CN202122200350.0U patent/CN216294235U/en active Active
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