CN211381709U - Self-tapping screw - Google Patents
Self-tapping screw Download PDFInfo
- Publication number
- CN211381709U CN211381709U CN201921423353.7U CN201921423353U CN211381709U CN 211381709 U CN211381709 U CN 211381709U CN 201921423353 U CN201921423353 U CN 201921423353U CN 211381709 U CN211381709 U CN 211381709U
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- threaded rod
- nut
- bone
- screw
- self
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Abstract
The utility model discloses a self-tapping screw, the screw cap comprises a screw cap, cross recess has been seted up at the nut top, nut bottom intermediate position is equipped with the threaded rod, threaded rod lateral wall threaded connection has the installation piece, the threaded rod bottom is equipped with the smooth surface, be equipped with the installing port on the installation piece, the screw thread with threaded rod lateral wall looks adaptation is seted up to the lateral wall in the installation port, seted up on the threaded rod and accomodate the groove, the threaded rod bottom is coniform, just the smooth surface has been seted up to the threaded rod bottom, nut, threaded rod all adopt titanium alloy material to make with the installation piece, the nut sets up with the threaded rod as integrated into one piece. The utility model discloses an installation piece, threaded rod and nut's cooperation is used, has increased the frictional force between threaded rod and the impaired bone for stable between bone and the screw before the operation, avoided traditional screw to take place the skew easily and then influence the phenomenon of operation when pouring into the bone.
Description
Technical Field
The utility model relates to an orthopedics screw technical field especially relates to a self-tapping screw.
Background
The screw is a tool for fastening the parts of an object step by utilizing the physical and mathematical principles of the inclined circular rotation and friction of the object. The screw is the general term for fasteners, everyday spoken words, metric thread is in MM (millimeters) units with a 60 degree pointed angle. Both american and english threads are in inches. The tooth tip angle of the american thread is also 60 degrees, while the tooth tip angle of the english thread is 55 degrees.
In the aspect of medicine, fracture of bone or impaired patient need fix impaired or fractured bone with the screw, reach the state that impaired bone recovers through the growth of a period of bone cell, and current screw is because the great waste time and energy of frictional force when the doctor pours into patient's bone into, has increased the time of operation, and general screw tip is the needle point form and bone area of contact is little, thereby it influences the operation effect to take place the skew easily when driving into the inside of bone.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the position is easy to deviate and the like when the screw is injected in the prior art, and providing a self-tapping screw.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a self-tapping screw, includes the nut, cross recess has been seted up at the nut top, nut bottom intermediate position is equipped with the threaded rod, threaded rod lateral wall threaded connection has the installation piece, the threaded rod bottom is equipped with the smooth surface.
Preferably, the mounting block is provided with a mounting opening, and the inner side wall of the mounting opening is provided with a thread matched with the outer side wall of the threaded rod.
Preferably, the threaded rod is provided with a receiving groove.
Preferably, the bottom of the threaded rod is conical, and a smooth surface is formed at the bottom of the threaded rod.
Preferably, the screw cap, the threaded rod and the mounting block are all made of titanium alloy materials.
Preferably, the nut and the threaded rod are integrally formed.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses an installation piece, threaded rod and nut's cooperation is used, has increased the frictional force between threaded rod and the impaired bone for stable between bone and the screw before the operation, avoided traditional screw to take place the skew easily and then influence the phenomenon of operation when pouring into the bone.
2. The utility model discloses a cooperation of smooth surface, nut and threaded rod is used, has reduced the screw friction when just getting into the bone, has practiced thrift operation time, has improved the practicality of device.
Drawings
Fig. 1 is a schematic front structural view of a tapping screw according to the present invention;
fig. 2 is a schematic view of a top view structure of the nut of the tapping screw according to the present invention.
In the figure: 1 nut, 2 threaded rods, 3 accommodating grooves, 4 mounting blocks, 5 smooth surfaces and 6 cross-shaped grooves.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 simplicity of description, and do not indicate or imply that the device or element being 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.
Referring to fig. 1-2, a self-tapping screw comprises a screw cap 1, wherein a cross-shaped groove 6 is formed in the top of the screw cap 1, and it is worth noting that the cross-shaped groove 6 is formed in the top of the screw cap 1, so that medical personnel can use different screwdrivers to rotate a threaded rod 2, the medical personnel do not need to spend time to search for matched screwdrivers, and the trial range of the device is improved;
the middle position of the bottom of the nut 1 is provided with a threaded rod 2, the bottom of the threaded rod 2 is conical, before the threaded rod 2 is injected into a bone, the bottom of the threaded rod 2 is firstly contacted with a damaged part of the bone of a patient, and because the friction coefficient of the outer surface of the bone is small, and the bottom of the threaded rod 2 is conical, the contact area with the bone is small, the deviation is easy to occur before the injection, the position injected into the bone is inaccurate, and the operation is further influenced;
the bottom of the threaded rod 2 is provided with a smooth surface 5, the threaded rod 2 is provided with a containing groove 3, the threaded rod 2 is provided with a spiral containing groove 3, when the threaded rod 2 is injected into a bone, bone fragments can enter the spiral containing groove 3, and when the threaded rod 2 is drawn out after an operation is finished, the fragments can be taken out of a human body together with the threaded rod 2, so that any untoward effect can be caused by the human body, and the practicability of the device is improved;
the outer side wall of the threaded rod 2 is in threaded connection with an installation block 4, an installation opening is formed in the installation block 4, threads matched with the outer side wall of the threaded rod 2 are formed in the inner side wall of the installation opening, the installation block 4 and the threaded rod 2 are provided with matched threads, after the threaded rod 2 is contacted with damaged bones, the threaded rod 2 is kept still, the installation block 4 is rotated to the bottom of the threaded rod 2, and when the installation block 4 is rotated to the bottom, the installation block 4 is contacted with the bones;
at the moment, medical staff only need to press the mounting block 4, the mounting block 4 is not easy to move with the damaged bone due to the large bottom area of the mounting block 4, and then the threaded rod 2 is injected into the bone, so that the threaded rod 2 is not easy to shift due to the stability of the mounting block 4, and the accuracy of the operation is improved;
the bottom of the threaded rod 2 is provided with the smooth surface 5, the smooth surface 5 is arranged at the bottom of the threaded rod 2, when the bottom of the threaded rod 2 enters a bone a little, the friction force between the threaded rod 2 and the bone is reduced due to the smooth surface 5, so that the threaded rod 2 can enter the bone more smoothly, medical staff can automatically enter the bone by only slightly rotating the threaded rod 2, and the operation time is reduced;
the screw cap 1, the threaded rod 2 and the mounting block 4 are all made of titanium alloy materials, so that the hardness of the screw is improved, and the screw has good corrosion resistance;
The utility model discloses specific theory of operation as follows:
in an initial state, before the threaded rod 2 is injected into a bone, the bottom of the threaded rod 2 is firstly contacted with a damaged part of the bone of a patient, and because the friction coefficient of the outer surface of the bone is small, and the bottom of the threaded rod 2 is conical, the contact area with the bone is small, the threaded rod is easy to deviate before injection, the position injected into the bone is inaccurate, and the operation is further influenced;
because the mounting block 4 and the threaded rod 2 are provided with the matched threads, after the threaded rod 2 is contacted with the damaged bone, the threaded rod 2 is kept still, the mounting block 4 is rotated to the bottom of the threaded rod 2, and when the mounting block 4 is rotated to the bottom, the mounting block 4 is contacted with the bone;
at the moment, medical staff only need to press the mounting block 4, the mounting block 4 is not easy to move with the damaged bone due to the large bottom area of the mounting block 4, and then the threaded rod 2 is injected into the bone, so that the threaded rod 2 is not easy to shift due to the stability of the mounting block 4, and the accuracy of the operation is improved;
the smooth surface 5 is arranged at the bottom of the threaded rod 2, when the bottom of the threaded rod 2 enters a bone a little, the friction force between the threaded rod 2 and the bone is reduced due to the smooth surface 5, so that the threaded rod 2 can enter the bone more smoothly, medical staff can automatically enter the bone by only slightly rotating the threaded rod 2, and the operation time is reduced;
the threaded rod 2 is provided with the spiral accommodating groove 3, when the threaded rod 2 is injected into a bone, bone fragments can enter the spiral accommodating groove 3, and when the threaded rod 2 is drawn out after an operation is finished, the fragments can be taken out of a human body together with the threaded rod 2, so that no adverse reaction can be caused by the human body, and the practicability of the device is improved;
it is worth noting that the cross-shaped groove 6 is formed in the top of the nut 1, and the cross-shaped groove 6 is formed, so that medical staff can use different screwdrivers to rotate the threaded rod 2, the surgical process is time-consuming, a large number of surgical instruments are needed, the medical staff do not need to spend time to find the matched screwdrivers, and the trial range of the device is widened;
wherein, nut 1, threaded rod 2 and installation piece 4 set up for integrated into one piece, have guaranteed the stability of whole screw, and nut 1, threaded rod 2 and installation piece 4 are titanium alloy material and make, have improved still to make the screw have fine corrosion resistance when the screw hardness.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a self-tapping screw, includes nut (1), its characterized in that, cross recess (6) have been seted up at nut (1) top, nut (1) bottom intermediate position is equipped with threaded rod (2), threaded rod (2) lateral wall threaded connection has installation piece (4), threaded rod (2) bottom is equipped with smooth surface (5).
2. A self-tapping screw as claimed in claim 1, wherein the mounting block (4) is provided with a mounting opening, the inner side wall of which is provided with a thread adapted to the outer side wall of the threaded shank (2).
3. A self-tapping screw as claimed in claim 1, wherein the threaded shank (2) is provided with a receiving groove (3).
4. A self-tapping screw as claimed in claim 1, wherein the bottom of the threaded shank (2) is conical and the bottom of the threaded shank (2) is provided with a smooth surface (5).
5. A self-tapping screw according to claim 1, characterised in that the nut (1), the threaded shank (2) and the mounting block (4) are made of a titanium alloy material.
6. A self-tapping screw according to claim 1, characterised in that the nut (1) is provided in one piece with the threaded shank (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921423353.7U CN211381709U (en) | 2019-08-29 | 2019-08-29 | Self-tapping screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921423353.7U CN211381709U (en) | 2019-08-29 | 2019-08-29 | Self-tapping screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211381709U true CN211381709U (en) | 2020-09-01 |
Family
ID=72219453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921423353.7U Active CN211381709U (en) | 2019-08-29 | 2019-08-29 | Self-tapping screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211381709U (en) |
-
2019
- 2019-08-29 CN CN201921423353.7U patent/CN211381709U/en active Active
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