CN211534744U - Single-thread or double-thread bidirectional self-tapping hollow screw and special spanner thereof - Google Patents
Single-thread or double-thread bidirectional self-tapping hollow screw and special spanner thereof Download PDFInfo
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- CN211534744U CN211534744U CN202020107668.7U CN202020107668U CN211534744U CN 211534744 U CN211534744 U CN 211534744U CN 202020107668 U CN202020107668 U CN 202020107668U CN 211534744 U CN211534744 U CN 211534744U
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 33
- 230000002457 bidirectional effect Effects 0.000 title claims description 6
- 210000000988 bone and bone Anatomy 0.000 abstract description 18
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000001054 cortical effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001755 vocal effect Effects 0.000 description 1
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Abstract
The utility model discloses a two-way self tapping hollow screw of single thread or double thread and special spanner thereof, including hollow screw rod with the fastening set up in the nut of screw rod tip, seted up on the nut with the hole of stepping down of the inside intercommunication of screw rod, a plurality of draw-in grooves that are the annular distribution are still seted up at the top of nut, the screw rod is kept away from the one end of nut is provided with the distal end screw thread, distal end screw thread's both ends all are provided with self tapping portion. The beneficial effects of the above technical scheme are: two self tapping portions of the screw driver can be conveniently screwed into the bone by the two-way self tapping hollow screw, and the two-way self tapping hollow screw can be conveniently taken out of the bone, so that the screw driver is more convenient to use.
Description
Technical Field
The utility model relates to the technical field, concretely relates to two-way self tapping hollow screw of single screw thread or double thread and special spanner thereof.
Background
The single/double thread hollow screw is used extensively in medical traumatology branch of academic or vocational study, is indispensable internal fixation device, but often can meet very big difficulty when taking out the screw after the fracture healing in clinical work, often can take place to take out the condition of difficulty.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides a two-way self tapping hollow screw of single screw thread or double thread and special spanner thereof can reach the convenient bone of putting into with the screw in, can be convenient again take out the screw.
The utility model discloses a pair of two-way self tapping hollow screw of single thread or double thread that provides on the one hand, including hollow screw rod with the fastening set up in the nut of screw rod tip, seted up on the nut with the hole of stepping down of the inside intercommunication of screw rod, a plurality of draw-in grooves that are the annular and distribute are still seted up at the top of nut, the screw rod is kept away from the one end of nut is provided with the distal end screw thread, the both ends of distal end screw thread all are provided with the self tapping.
The beneficial effects of the above technical scheme are: two self tapping portions of the screw driver can be conveniently screwed into the bone by the two-way self tapping hollow screw, and the two-way self tapping hollow screw can be conveniently taken out of the bone, so that the screw driver is more convenient to use.
Further, the self-tapping portion is a cutting edge of a screw end portion. When the screw rod rotates, the screw rod can carry the cutting edge to cut the groove in the bone, so that the screw rod rotates to cut an internal thread matched with the thread at the far end, and the screw rod can be fixed in the bone through the thread.
Further, the clamping grooves are three, and the included angle between every two adjacent clamping grooves is 120 degrees.
Further, a near-end thread is further arranged at one end, far away from the far-end thread, of the screw rod, and the near-end thread abuts against the screw cap. The structure of double thread adopted under the cortical bone can be screwed in more easily.
The utility model discloses another aspect provides a special spanner for twisting two-way self tapping hollow screw, including the mobile jib, the one end of mobile jib is fixed with the handle, and the corresponding other end is provided with the card arris, the card arris is outwards extended by the mobile jib, the quantity and the distribution angle of card arris are unanimous with the draw-in groove. The special wrench can apply a greater axial force to the screw, and is more easily advanced when screwing into the bone.
Further, the lower end of the main rod extends out of the clamping edge to be inserted into the hollow part of the screw rod. After the screw rod is inserted, the special spanner is not easy to separate from the screw rod.
Furthermore, the middle part of one side of the clamping edge, which is far away from the main rod, protrudes outwards. The raised portions make the clamping ribs stronger.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a sectional view of embodiment 1 of the present invention;
fig. 2 is a plan view of embodiment 1 of the present invention;
fig. 3 is a front view of embodiment 2 of the present invention.
Reference numerals: the screw 100, the nut 110, the slot 111, the offset hole 112, the distal thread 120, the cutting blade 121, the main rod 200, the clamping rib 210 and the handle 220.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship as shown in the drawings for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media.
Example 1
As shown in fig. 1-2, this embodiment provides a two-way self-tapping hollow screw of single thread or double thread, including hollow screw rod 100 with the fastening set up in the nut 110 of screw rod 100 tip, set up the inside intercommunication hole of stepping down 112 with screw rod 100 on the nut 110, a plurality of draw-in grooves 111 that are the annular distribution have still been seted up at the top of nut 110, and for increase torque, set up draw-in groove 111 at the avris of nut 110, screw rod 100 keeps away from the one end of nut 110 is provided with distal end screw thread 120, distal end screw thread 120's both ends all are provided with the self-tapping portion.
Two self tapping portions of the screw driver can be conveniently screwed into the bone by the two-way self tapping hollow screw, and the two-way self tapping hollow screw can be conveniently taken out of the bone, so that the screw driver is more convenient to use.
The self-tapping portion is a cutting edge 121 at the end of the thread. The screw 100, when rotated, carries the cutting edge 121 to nick the bone, such that rotation of the screw 100 cuts an internal thread that matches the distal thread 120, thereby allowing the screw 100 to be threadedly secured in the bone. After the bone heals, need take out the screw, can rotate with opposite direction when screwing in during the time of taking out for cutting edge 121 that is located the upper portion can cut the bone and produce the screw thread, and then makes the more convenient taking out of screw, avoids causing the secondary damage to the bone.
The number of the clamping grooves 111 is three, and the included angle between adjacent clamping grooves 111 is 120 degrees. The included angle of 120 degrees enables the three clamping grooves 111 to be evenly distributed, and the stress is more even when the clamping device is used.
The end of the screw 100 remote from the distal thread 120 is also provided with a proximal thread which abuts the nut 110. The structure of double thread adopted under the cortical bone can be screwed in more easily.
Example 2
As shown in fig. 3, the present embodiment provides a special spanner for screwing bidirectional self-tapping hollow screw, including mobile jib 200, the one end of mobile jib 200 is fixed with handle 220, be carved with anti-skidding line on the handle 220, use more the handedness, corresponding other end is provided with card arris 210, card arris 210 is outwards extended by mobile jib 200, the thickness and the length of card arris 210 bottom are unanimous with draw-in groove 111, the quantity and the distribution angle of card arris 210 also are unanimous with draw-in groove 111 for card arris 210 can insert in draw-in groove 111, rotate special spanner can rotate bidirectional self-tapping hollow screw. The special wrench can apply a greater axial force to the screw, and is more easily advanced when screwing into the bone.
The lower end of the main rod 200 is protruded to the clamping rib 210 to be inserted into the hollow portion of the screw 100. The screw 100 is inserted so that the special wrench is not easily detached from the screw 100. The lower end of the main rod 200 is 0.5-2cm longer than the section of the clamping rib 210.
The middle of one side of the clamping rib 210 away from the main rod 200 protrudes outwards. The raised portions make the clamping rib 210 stronger.
In the description of the present application, it is to be understood that the terminology used herein is for the purpose of description only and is not intended to be interpreted as indicating or implying any relative importance or implicit indication of the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, system, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, systems, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (7)
1. The utility model provides a two-way self tapping hollow screw of single thread or double thread, its characterized in that, including hollow screw rod with the fastening set up in the nut of screw rod tip, set up on the nut with the hole of stepping down of the inside intercommunication of screw rod, a plurality of draw-in grooves that are the annular and distribute are still seted up at the top of nut, the screw rod is kept away from the one end of nut is provided with the distal end screw thread, the both ends of distal end screw thread all are provided with self-tapping portion.
2. A single-or double-threaded, bi-directional, self-tapping hollow screw as claimed in claim 1, wherein said self-tapping portion is a cutting edge of a threaded end portion.
3. A single or double thread, bi-directional self-tapping cannulated screw according to claim 1, wherein the number of the flutes is three and the angle between adjacent flutes is 120 °.
4. A single or double thread, bi-directional self-tapping cannulated screw according to any of claims 1-3, wherein the end of the shank remote from the distal thread is further provided with proximal threads, the proximal threads abutting the nut.
5. The utility model provides a special spanner for twisting two-way self tapping hollow screw which characterized in that, includes the mobile jib, the one end of mobile jib is fixed with the handle, and the corresponding other end is provided with the card arris, the card arris is outwards extended by the mobile jib, the quantity and the distribution angle of card arris are unanimous with the draw-in groove.
6. The special wrench for screwing a bidirectional self-tapping cannulated screw of claim 5, wherein the lower end of the main rod extends out of the locking rib to be inserted into the hollow of the screw rod.
7. The special wrench for driving the bidirectional self-tapping cannulated screw of claim 5, wherein the middle of the side of the locking rib away from the main rod is protruded outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020107668.7U CN211534744U (en) | 2020-01-17 | 2020-01-17 | Single-thread or double-thread bidirectional self-tapping hollow screw and special spanner thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020107668.7U CN211534744U (en) | 2020-01-17 | 2020-01-17 | Single-thread or double-thread bidirectional self-tapping hollow screw and special spanner thereof |
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| Publication Number | Publication Date |
|---|---|
| CN211534744U true CN211534744U (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020107668.7U Active CN211534744U (en) | 2020-01-17 | 2020-01-17 | Single-thread or double-thread bidirectional self-tapping hollow screw and special spanner thereof |
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| CN (1) | CN211534744U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935333A (en) * | 2021-01-27 | 2021-06-11 | 湖南申亿五金标准件有限公司 | Lightweight reticular hollow screw and production and processing device thereof |
-
2020
- 2020-01-17 CN CN202020107668.7U patent/CN211534744U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935333A (en) * | 2021-01-27 | 2021-06-11 | 湖南申亿五金标准件有限公司 | Lightweight reticular hollow screw and production and processing device thereof |
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Effective date of registration: 20210715 Address after: 150000 157 health Road, Nangang District, Harbin, Heilongjiang Patentee after: HARBIN MEDICAL University Address before: Department of orthopedics, 21st floor, building 2, First Hospital of Harbin Medical University, 23 youyou street, Nangang District, Harbin City, Heilongjiang Province Patentee before: Hu Yuhang |