CN216777204U - Anti-receding bone screw - Google Patents
Anti-receding bone screw Download PDFInfo
- Publication number
- CN216777204U CN216777204U CN202122948527.5U CN202122948527U CN216777204U CN 216777204 U CN216777204 U CN 216777204U CN 202122948527 U CN202122948527 U CN 202122948527U CN 216777204 U CN216777204 U CN 216777204U
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- Prior art keywords
- screw
- shaft
- bone
- bone screw
- external diameter
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- Expired - Fee Related
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 43
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000035876 healing Effects 0.000 description 4
- 239000003351 stiffener Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a retreat-preventing bone screw, which comprises an upper screw body and a lower screw body, wherein the upper screw body comprises a first screw, one side of the outer surface of the first screw is provided with a first thread layer, a second thread layer is arranged on the other side of the outer surface of the first screw, a first shaft lever is connected with the internal thread of the first screw, the lower screw body comprises a second screw sleeved on the outer surface of the second thread layer, one end of the second screw is fixedly connected with a screw cap, and the internal part of the second screw is movably connected with the second shaft lever in a penetrating way, the screw is arranged into a combined structure of an upper screw body and a lower screw body, the first screw and the second screw are in threaded connection, and the first and second screws are of the same diameter, so that the bone is subjected to an even pressure after attachment to the bone, the lower nail body with different lengths can be selected according to the length of the bone screw, so that the screws with different lengths required by the fracture part can be flexibly adjusted.
Description
Technical Field
The utility model relates to the technical field of bone screws, in particular to a retreat-preventing bone screw.
Background
The bone screw is a common fixing device, is suitable for fixing the fracture part, connects the bones at the two ends of the fracture again, and the steel nail is arranged in the bone, and the phenomenon that the steel nail loosens and retreats from the bone can be generated after long-time running-in, so that the bone screw is not beneficial to the healing of the fracture part, and the steel nail needs to be screwed down again when the bone screw is serious, thereby bringing dual pain to the patient. Therefore, the anti-receding bone screw is improved.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the utility model provides the following technical scheme:
the utility model discloses a retreat-preventing bone screw which comprises an upper screw body and a lower screw body, wherein the upper screw body comprises a first screw, a first thread layer is arranged on one side of the outer surface of the first screw, a second thread layer is arranged on the other side of the outer surface of the first screw, a first shaft rod is connected with the inner thread of the first screw, the lower screw body comprises a second screw sleeved on the outer surface of the second thread layer, one end of the second screw is fixedly connected with a screw cap, and the inner part of the second screw is movably connected with a second shaft rod in a penetrating mode.
In a preferred embodiment of the present invention, the first thread layer has an outer diameter larger than that of the first screw, and the second thread layer has an outer diameter smaller than that of the first screw.
In a preferred embodiment of the present invention, the second screw has a threaded cavity therein, and an outer diameter of the second screw is equal to an outer diameter of the first screw.
As a preferable technical solution of the present invention, one end of the second shaft rod is in a threaded structure, and the second shaft rod is in threaded connection with the first shaft rod.
As a preferable technical solution of the present invention, the first shaft and the second shaft are both cylindrical structures, and a diameter of the first shaft is larger than a diameter of the second shaft.
As a preferable technical scheme of the utility model, a through hole is formed in the first screw, the outer surface of the first shaft lever is movably connected with a connecting rod, and one end of the connecting rod is positioned in the through hole and is movably connected with a reinforcing rod.
As a preferable technical scheme of the utility model, the number of the through holes, the number of the connecting rods and the number of the reinforcing rods are four.
The beneficial effects of the utility model are:
1. the screw is arranged into a combined structure of an upper screw body and a lower screw body, the first screw and the second screw are in threaded connection, and the diameters of the first screw and the second screw are the same, so that the pressure born by the bone after the screw is connected to the bone is balanced, the lower screw bodies with different lengths can be selected according to the length of the required bone screw, and the screws with different lengths required by the fracture part can be flexibly adjusted.
2. The utility model provides a prevent moving back type bone screw, through run through the second shaft lever to the inside of second screw and threaded connection to first shaft lever, continue rotatory second shaft lever after the second shaft lever links as an organic whole with the first shaft lever two, make the first shaft lever rotate in step, first shaft lever pivoted in-process drives the stiffener through the connecting rod and extends to the outside of first screw from the inside of through-hole, so that increase the area of contact between first screw and the bone, improve the stability after the screw is gone into, avoid bone screw to appear moving back the situation of nail, prevent to influence the healing of fracture department organism.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic view of the anti-backing bone screw according to the present invention;
FIG. 2 is a schematic view of a second steel nail structure of the anti-backing bone screw according to the present invention;
FIG. 3 is a schematic view of the internal structure of the first steel nail of the anti-back bone screw according to the present invention.
In the figure: 1. a nail body is arranged; 2. a lower nail body; 3. a first screw; 4. a first thread layer; 5. a second threaded layer; 6. a first shaft lever; 7. a second screw; 8. a nail cap; 9. a second shaft lever; 10. a threaded cavity; 11. a through hole; 12. a connecting rod; 13. a reinforcing rod.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that they are presented herein only to illustrate and explain the present invention and not to limit the present invention.
Example (b): as shown in fig. 1-3, the anti-receding bone screw of the present invention comprises an upper screw body 1 and a lower screw body 2, wherein the upper screw body 1 comprises a first screw 3, one side of an outer surface of the first screw 3 is provided with a first thread layer 4, the other side of the outer surface of the first screw 3 is provided with a second thread layer 5, the first screw 3 is connected with a first shaft rod 6 through an internal thread, the lower screw body 2 comprises a second screw 7 sleeved on the outer surface of the second thread layer 5, one end of the second screw 7 is fixedly connected with a screw cap 8, and the second screw 7 is movably connected with a second shaft rod 9 through an internal thread.
The outer diameter of the first thread layer 4 is larger than that of the first screw 3, the outer diameter of the second thread layer 5 is smaller than that of the first screw 3, the inner part of the second screw 7 is provided with a thread cavity 10, the outer diameter of the second screw 7 is equal to that of the first screw 3, the screw is arranged into a combined structure of the upper screw body 1 and the lower screw body 2, the first screw 3 is in threaded connection with the second screw 7, and the diameters of the first screw 3 and the second screw 7 are the same, so that the pressure born by bones after the bone is connected to the bones is balanced, the lower screw bodies 2 with different lengths can be selected according to the length of the required bone screw, and the screws with different lengths required by the fracture part can be flexibly adjusted.
Wherein, one end of the second shaft rod 9 is in a threaded structure, and the second shaft rod 9 is in threaded connection with the first shaft rod 6.
The first shaft lever 6 and the second shaft lever 9 are both cylindrical structures, and the diameter of the first shaft lever 6 is larger than that of the second shaft lever 9.
Wherein, the inside through-hole 11 of having seted up of first screw 3, the surface swing joint of first axle bar 6 has connecting rod 12, the inside swing joint that the one end of connecting rod 12 is located through-hole 11 has stiffener 13, through-hole 11, the quantity of connecting rod 12 and stiffener 13 is four, through running through the inside of second axle bar 9 to second screw 7 and threaded connection to the inside of first axle bar 6, continue rotatory second axle bar 9 after second axle bar 9 and first axle bar 6 two link as an organic whole, make first axle bar 6 rotate in step, first axle bar 6 pivoted in-process drives stiffener 13 through connecting rod 12 and extends to the outside of first screw 3 from the inside of through-hole 11, so that increase the area of contact between first screw 3 and the bone, improve the stability after the screw links into, avoid the screw condition that the nail appears moving back, prevent to influence the healing of fracture department organism.
The working principle is as follows: the screw is set to be a combined structure of an upper screw body 1 and a lower screw body 2, a first screw 3 and a second screw 7 are in threaded connection, the diameters of the first screw 3 and the second screw 7 are the same, so that the pressure born by bones after the screws are connected to the bones is balanced, the lower screw bodies 2 with different lengths can be selected according to the length of a required bone screw, the screws with different lengths required by fracture parts can be flexibly adjusted, the second shaft 9 penetrates into the second screw 7 and is in threaded connection with the inside of a first shaft 6, the second shaft 9 and the first shaft 6 are connected into a whole and then continuously rotate the second shaft 9, so that the first shaft 6 synchronously rotates, a connecting rod 12 drives a reinforcing rod 13 to extend from the inside of a through hole 11 to the outside of the first screw 3 in the rotating process of the first shaft 6, so as to increase the contact area between the first screw 3 and the bones, the stability of the screw after being connected is improved, the condition that the bone screw is withdrawn is avoided, and the healing of the fracture part body is prevented from being influenced.
Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
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 changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. 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 (7)
1. The utility model provides a prevent moving back type bone screw, includes the last nail body (1) and the lower nail body (2), its characterized in that, go up the nail body (1) and include first screw (3), the surface one side of first screw (3) is provided with first thread layer (4), and the surface opposite side of first screw (3) is provided with second thread layer (5), the internal thread of first screw (3) is connected with first axostylus axostyle (6), the lower nail body (2) is including cup jointing second screw (7) at second thread layer (5) surface, the one end fixedly connected with nut (8) of second screw (7), and the inside activity through connection of second screw (7) has second axostylus axostyle (9).
2. Anti-back bone screw according to claim 1, characterized in that the external diameter of said first threaded layer (4) is greater than the external diameter of the first screw (3) and the external diameter of said second threaded layer (5) is smaller than the external diameter of the first screw (3).
3. Anti-back bone screw according to claim 1, characterized in that the second screw (7) has a threaded cavity (10) open on the inside and the second screw (7) has an external diameter equal to the external diameter of the first screw (3).
4. The anti-back bone screw according to claim 1, characterized in that one end of the second shaft (9) is threaded and the second shaft (9) is in threaded connection with the first shaft (6).
5. Anti-back bone screw according to claim 1, characterized in that said first shaft (6) and said second shaft (9) are both cylindrical structures, the diameter of said first shaft (6) being greater than the diameter of said second shaft (9).
6. The anti-receding bone screw according to claim 1, characterized in that a through hole (11) is opened in the first screw (3), a connecting rod (12) is movably connected to the outer surface of the first shaft (6), and a reinforcing rod (13) is movably connected to one end of the connecting rod (12) inside the through hole (11).
7. Anti-back bone screw according to claim 6, characterized in that the number of said through holes (11), connecting rods (12) and reinforcing rods (13) is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122948527.5U CN216777204U (en) | 2021-11-29 | 2021-11-29 | Anti-receding bone screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122948527.5U CN216777204U (en) | 2021-11-29 | 2021-11-29 | Anti-receding bone screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216777204U true CN216777204U (en) | 2022-06-21 |
Family
ID=82004746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122948527.5U Expired - Fee Related CN216777204U (en) | 2021-11-29 | 2021-11-29 | Anti-receding bone screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216777204U (en) |
-
2021
- 2021-11-29 CN CN202122948527.5U patent/CN216777204U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220621 |