CN219835668U - High-compression-resistance easy-to-take-out double-head hollow screw - Google Patents
High-compression-resistance easy-to-take-out double-head hollow screw Download PDFInfo
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- CN219835668U CN219835668U CN202320345118.2U CN202320345118U CN219835668U CN 219835668 U CN219835668 U CN 219835668U CN 202320345118 U CN202320345118 U CN 202320345118U CN 219835668 U CN219835668 U CN 219835668U
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Abstract
The utility model relates to the technical field of medical instruments and discloses a high-compression-resistance and easy-to-take-out double-head hollow screw which comprises a screw body, wherein the screw body comprises a screw head part, a screw rod part and a screw tail part, a guide pin hole is penetrated through the screw body, the screw head part and the screw tail part are respectively provided with a head thread and a tail thread, the thread sections of the head thread and the tail thread are opposite, the head thread and the tail thread are both co-rotating threads, the head end of the screw head part is provided with a plurality of first self-tapping grooves, the tail end of the screw head part is provided with a first self-tapping groove, the head end of the screw tail part is provided with a plurality of second self-tapping grooves, and the tail end of the screw tail part is provided with a second self-tapping groove; the double-ended hollow screw with high compression resistance and easy removal solves the problem of how to improve holding force and anti-pulling force and facilitate subsequent screw removal.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a double-ended hollow screw with high compression resistance and easy removal.
Background
The binding force of the nail-bone interface is an important parameter for providing screw holding force and anti-pulling force, and is a key for maintaining mechanical stability after a trauma operation. Cases of surgical failure caused by loosening, falling-out and displacement of screws due to the fact that stable combination cannot be achieved at the interface after clinical operation are not rare; meanwhile, for the existence of the screw for a long time, the bone growth is tightly combined with the screw, so that the screw is difficult to take out. Therefore, how to improve the holding force and the pull-out resistance force and facilitate the subsequent screw removal becomes a problem to be solved.
Disclosure of Invention
The utility model aims to provide a double-ended hollow screw with high compression resistance and easy removal, which is used for solving at least one of the problems in the prior art.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a high resistance to compression easily takes out double-end hollow screw, includes the screw body, the screw body includes screw head, screw pole portion and screw afterbody, run through on the screw body and be equipped with the guide pin hole, screw head and screw afterbody are equipped with head screw thread and afterbody screw thread respectively, the screw cross-section of head screw thread and afterbody screw thread is opposite, head screw thread and afterbody screw thread are the syntropy rotatory screw thread, the head of screw head is equipped with a plurality of first self-tapping groove, the end of screw head is equipped with first withdrawal self-tapping groove, the head of screw afterbody is equipped with a plurality of second self-tapping groove, the end of screw afterbody is equipped with the second withdrawal self-tapping groove.
In the technical scheme, as the guide pin hole is penetrated on the screw body, the operation is convenient, and the operation steps are simplified; because the head of the screw is provided with a plurality of first self-tapping grooves, the screw body has self-tapping and self-drilling capabilities, so that the screw can be conveniently screwed into the bone, and the operation steps are reduced; the head end of the tail part of the screw is provided with a plurality of second self-tapping grooves, so that the tail part of the screw can achieve self-tapping capability, and when the tail part of the screw reaches a bone surface, the diameter of the tail part is prevented from being increased to cause the explosion of the bone block; because the head part and the tail part of the screw are respectively provided with the first retreating self-tapping groove and the second retreating self-tapping groove, the bone block can be conveniently taken out after growth and recovery. Because the thread sections of the head thread and the tail thread are opposite, namely, the screw head and the screw tail adopt thread profiles in opposite directions, the screw body can increase the supporting force on the bone block, the postoperative recovery is facilitated, the screw head and the screw tail thread adopt the same screw direction and different thread profile directions, and the compression resistance of the screw can be enhanced. In conclusion, the head part and the tail part of the screw are provided with self-tapping grooves and self-tapping grooves which are withdrawn, so that surgical implantation and extraction are facilitated. The screw head and the screw tail adopt the same screw direction and different thread tooth type directions, so that the compression resistance of the screw is enhanced.
Further, in order to provide a specific head thread and tail thread structure, the head thread and the tail thread each comprise a first face and a second face, the first face is an inclined face, the first face of the head of the screw is located on the right side of the second face, and the first face of the tail of the screw is located on the left side of the second face.
Further, the pitch of the head thread is larger than the pitch of the tail thread. The screw head and screw tail threads are of different pitches, which can pressurize the bone block when the screw tail is implanted.
Furthermore, in order to facilitate the screwing operation, the head thread and the tail thread are both right-hand rotating threads.
Furthermore, in order to be convenient for docking with the screwing tool, the tail part of the screw body is provided with an inner hexagonal hole or an inner hexagonal flower-shaped hole.
Further, in order to enable the screw head to have a better self-tapping screwing effect, the first self-tapping grooves are uniformly formed in three parts along the circumferential direction of the head end of the screw head.
Further, in order to enable the tail portion of the screw to have a better self-tapping screwing effect, the second self-tapping grooves are uniformly formed in three parts along the circumferential direction of the head end of the tail portion of the screw.
The beneficial effects of the utility model are as follows: in the technical scheme, as the guide pin hole is penetrated on the screw body, the operation is convenient, and the operation steps are simplified; because the head of the screw is provided with a plurality of first self-tapping grooves, the screw body has self-tapping and self-drilling capabilities, so that the screw can be conveniently screwed into the bone, and the operation steps are reduced; the head end of the tail part of the screw is provided with a plurality of second self-tapping grooves, so that the tail part of the screw can achieve self-tapping capability, and when the tail part of the screw reaches a bone surface, the diameter of the tail part is prevented from being increased to cause the explosion of the bone block; because the head part and the tail part of the screw are respectively provided with the first retreating self-tapping groove and the second retreating self-tapping groove, the bone block can be conveniently taken out after growth and recovery. Because the thread sections of the head thread and the tail thread are opposite, namely, the screw head and the screw tail adopt thread profiles in opposite directions, the screw body can increase the supporting force on the bone block, the postoperative recovery is facilitated, the screw head and the screw tail thread adopt the same screw direction and different thread profile directions, and the compression resistance of the screw can be enhanced. In conclusion, the head part and the tail part of the screw are provided with self-tapping grooves and self-tapping grooves which are withdrawn, so that surgical implantation and extraction are facilitated. The screw head and the screw tail adopt the same screw direction and different thread tooth type directions, so that the compression resistance of the screw is enhanced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of the present utility model;
FIG. 3 is a schematic cross-sectional view of a head thread according to the present utility model;
FIG. 4 is a schematic cross-sectional view of the trailing thread of the present utility model.
In the figure: a screw head 1; head threads 1.1; a first self-tapping groove 1.2; the first retreating self-tapping groove 1.3; a screw shaft 2; a screw tail 3; tail threads 3.1; a second self-tapping groove 3.2; the second withdrawing self-tapping groove 3.3; a guide pin hole 4; a first face 5; a second face 6; and an inner hexagonal hole 7.
Detailed Description
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the present utility model will be briefly described below with reference to the accompanying drawings and the description of the embodiments or the prior art, and it is obvious that the following description of the structure of the drawings is only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art. It should be noted that the description of these examples is for aiding in understanding the present utility model, but is not intended to limit the present utility model.
Example 1:
as shown in fig. 1-4, this embodiment provides a high-compression-resistance easy-to-take-out double-ended hollow screw, including the screw body, the screw body includes screw head 1, screw shaft portion 2 and screw afterbody 3, run through on the screw body and be equipped with guide pin hole 4, screw head 1 and screw afterbody 3 are equipped with head screw thread 1.1 and afterbody screw thread 3.1 respectively, the screw cross section of head screw thread 1.1 and afterbody screw thread 3.1 is opposite, no thread design on screw shaft portion 2, head screw thread 1.1 and afterbody screw thread 3.1 are the same direction rotation screw thread, for convenient screw-in operation, head screw thread 1.1 and afterbody screw thread 3.1 are right-hand rotation screw thread, the head end of screw head 1 is equipped with a plurality of first self-tapping grooves 1.2, specifically, for making screw head 1 have better self-tapping screw-in effect, first self-tapping groove 1.2 evenly is provided with three along the head end circumference of screw head 1, the end of screw head 1 is equipped with first self-tapping groove 1.3, the head end of afterbody 3 is equipped with a plurality of second self-tapping grooves 3.2, specific self-tapping groove 3 is equipped with 3, 3 is provided with 3 self-tapping groove 3, 3 is even for the end of self-tapping screw 3 is provided with end.
In the technical scheme, as the guide pin hole 4 is penetrated on the screw body, the operation is convenient, and the operation steps are simplified; because the head part 1 of the screw is provided with a plurality of first self-tapping grooves 1.2, the screw body has self-tapping and self-drilling capabilities, so that the screw can be conveniently screwed into the bone, and the operation steps are reduced; the head end of the screw tail 3 is provided with a plurality of second self-tapping grooves 3.2, so that the screw tail 3 can obtain self-tapping capability, and when the screw tail 3 reaches a bone surface, the diameter of the tail is prevented from being increased to cause the explosion of a bone block; because the screw head part 1 and the screw tail part 3 are respectively provided with the first withdrawing self-tapping groove 1.3 and the second withdrawing self-tapping groove 3.3, the bone block can be conveniently taken out after growth and recovery. Because the thread sections of the head thread 1.1 and the tail thread 3.1 are opposite, namely, the screw head 1 and the screw tail 3 adopt thread profiles in opposite directions, the screw body can increase the supporting force on bone blocks, the postoperative recovery is facilitated, the screw head 1 and the screw tail 3 adopt the same screw direction and different thread profile directions, and the compression resistance of the screw can be enhanced. In conclusion, the screw head part 1 and the screw tail part 3 are provided with self-tapping grooves and self-tapping retreating grooves, so that surgical implantation and extraction are facilitated. The screw head 1 and the screw tail 3 adopt the same screw direction and different screw thread type directions, so that the compression resistance of the screw is enhanced.
Example 2:
this example was optimized based on example 1 above.
As shown in fig. 3 and 4, in order to provide a specific structure of the head thread 1.1 and the tail thread 3.1, the head thread 1.1 and the tail thread 3.1 each comprise a first face 5 and a second face 6, the first face 5 is an inclined face, the first face 5 of the screw head 1 is located on the right side of the second face 6, and the first face 5 of the screw tail 3 is located on the left side of the second face 6.
Example 3:
this example was optimized based on example 1 above.
The pitch of the leading thread 1.1 is greater than the pitch of the trailing thread 3.1. The screw head 1 and the screw tail 3 are threaded with different pitches, which can give compression to the bone block when the screw tail 3 is implanted.
Example 4:
this example was optimized based on example 1 above.
In order to facilitate the butt joint with the screwing tool, the tail part of the screw body is provided with an inner hexagonal hole 7 or an inner hexagonal flower-shaped hole.
Finally, it should be noted that: the above is only a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. The utility model provides a high resistance to compression easily takes out double-end hollow screw which characterized in that: including the screw body, the screw body includes screw head, screw pole portion and screw afterbody, it is equipped with the guide pin hole to run through on the screw body, screw head and screw afterbody are equipped with head screw thread and afterbody screw thread respectively, head screw thread and afterbody screw thread's screw thread cross-section are opposite, head screw thread and afterbody screw thread are homodromous rotation screw thread, the head end of screw head is equipped with a plurality of first self-tapping grooves, the end of screw head is equipped with first withdrawal self-tapping groove, the head end of screw afterbody is equipped with a plurality of second self-tapping grooves, the end of screw afterbody is equipped with the second withdrawal self-tapping groove.
2. The high compression resistant easy-to-remove double-ended cannulated screw of claim 1, wherein: the head thread and the tail thread comprise a first surface and a second surface, the first surface is an inclined surface, the first surface of the head of the screw is positioned on the right side of the second surface, and the first surface of the tail of the screw is positioned on the left side of the second surface.
3. The high compression resistant easy-to-remove double-ended cannulated screw of claim 1, wherein: the pitch of the head thread is larger than that of the tail thread.
4. The high compression resistant easy-to-remove double-ended cannulated screw of claim 1, wherein: the head thread and the tail thread are right-hand rotating threads.
5. The high compression resistant easy-to-remove double-ended cannulated screw of claim 1, wherein: the tail part of the screw body is provided with an inner hexagonal hole or an inner hexagonal flower-shaped hole.
6. The high compression resistant easy-to-remove double-ended cannulated screw of claim 1, wherein: the first self-tapping grooves are uniformly formed in three parts along the circumferential direction of the head end of the screw head.
7. The high compression resistant easy-to-remove double-ended cannulated screw of claim 1, wherein: and the second self-tapping grooves are uniformly formed in three parts along the circumferential direction of the head end of the tail part of the screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320345118.2U CN219835668U (en) | 2023-02-28 | 2023-02-28 | High-compression-resistance easy-to-take-out double-head hollow screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320345118.2U CN219835668U (en) | 2023-02-28 | 2023-02-28 | High-compression-resistance easy-to-take-out double-head hollow screw |
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| CN219835668U true CN219835668U (en) | 2023-10-17 |
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| CN202320345118.2U Active CN219835668U (en) | 2023-02-28 | 2023-02-28 | High-compression-resistance easy-to-take-out double-head hollow screw |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119074093A (en) * | 2024-08-26 | 2024-12-06 | 北京市春立正达医疗器械股份有限公司 | A hollow nail anchor matching system for fixing soft tissue and bone blocks |
-
2023
- 2023-02-28 CN CN202320345118.2U patent/CN219835668U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119074093A (en) * | 2024-08-26 | 2024-12-06 | 北京市春立正达医疗器械股份有限公司 | A hollow nail anchor matching system for fixing soft tissue and bone blocks |
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