CN101692983A - Bone screw component and locking nut thereof - Google Patents
Bone screw component and locking nut thereof Download PDFInfo
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- CN101692983A CN101692983A CN200910235604.3A CN200910235604A CN101692983A CN 101692983 A CN101692983 A CN 101692983A CN 200910235604 A CN200910235604 A CN 200910235604A CN 101692983 A CN101692983 A CN 101692983A
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- bone screw
- rod
- flanks
- locking nut
- nut
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Abstract
The invention discloses a bone screw component and a locking nut thereof. The bone screw component comprises a bone screw, a rod and the locking nut, the bone screw consists of an implanting portion and a head portion, the head portion is provided with an inner cavity, one end of the implanting portion is connected to the lower portion of the inner cavity of the head portion, the rod is located in the inner cavity of the head portion and arranged above the implanting portion, the locking nut comprises a nut end and a pressing block connected to the lower portion of the nut end, and the lower portion of the pressing block is equipped with a concave component which is pressed on the rod. The locking nut can lock the rod tightly, and then the rod in a locked state is not easy to be loosened.
Description
Technical field
The present invention relates to a kind of orthopedic medical device, particularly a kind of medical apparatus and instruments that is used for spinal fixation specifically, the present invention relates to a kind of bone screw and locking nut thereof.
Background technology
In orthopedic instrument, particularly in the spinal internal fixation system, often need the implantable bone screw assembly, with bone screw assembly as for example carrying out fixed means on the spinal column at skeleton.
Relevant bone screw assembly comprises bone screw, nut and rod.Bone screw has implantation portion and nail head, and nail head has an inner chamber, and an end of implantation portion is rotatably connected to the bottom of the inner chamber of nail head.Nut then is threaded in the top of the inner chamber of nail head, and the bottom of nut is the plane.In the inner chamber of nail head and in the upper ends of implantation portion rod is arranged, nut is screwed into from the inner chamber top of nail head, and directly is pressed on the rod, thereby rod is locked.
But above-mentioned rod only is to be connected implantation portion and the bottom is between the planar nut, and the actual contact face of rod is the line segment of two weak points, and so rod is not easy to be locked very much.In addition, the top of bone screw 1 has the arc section of evagination, rod is in the position of arc section, even rod just has been initially located in the situation that is locked, the motion that does not stop in a large number every day along with human body, the nut of this locking situation is very easy to loosening, and then causes rod to skid off the nail head of bone screw easily, thereby causes internal fixation system to lose efficacy.
Summary of the invention
The present invention's purpose is, a kind of bone screw assembly is provided, and its locking nut can be locked rod, and the rod under locking state is not easy to become flexible.
Another object of the present invention is, a kind of locking nut is provided, and it can be with the rod locking of bone screw assembly, and the rod under locking state is not easy to become flexible.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize,
The present invention proposes a kind of locking nut, it comprises nut head, it is characterized in that, described locking nut also comprises the compact heap that is connected described nut head bottom, and the bottom of described compact heap is provided with female part.
The invention allows for a kind of bone screw assembly, it comprises: bone screw, and described bone screw comprises implantation portion and nail head, and described nail head has an inner chamber, and an end of described implantation portion is connected the bottom of the inner chamber of nail head; Rod, described rod is arranged in the inner chamber of described nail head, and is placed on described implantation portion top; It is characterized in that described bone screw assembly also comprises: locking nut, described locking nut comprise nut head and the compact heap that is connected described nut head bottom, and the bottom of described compact heap is provided with female part, and described female part is pressed on the described rod.
In the embodiment of the invention, the female part of the compact heap bottom of locking nut is pressed on the rod, and female part is an arc with the contact surface of rod, and for the plane contact of short line segment, arc contact surface can be pressed more tightly and be established rod, and rod can be locked, and is difficult for loosening.
In preferred embodiment, described female part comprises two flanks that are provided with at interval, forms recess between two flanks; Described two flanks are pressed described rod and are established into recess.
In preferred embodiment, the top distance between described two flanks is less than the bottom distance.
In preferred embodiment, described two flanks are respectively the rubber-like flank.
In preferred embodiment, form 10～30 ° of angles between described two flanks.
Characteristics of the present invention and advantage are: because locking nut has compact heap, two flanks of compact heap are pressed rod and are established into recess, and increase along with the downward coupling mechanism force of nut head, two flanks are out of shape a little to both sides and open, and the outside of two flanks is subjected to the restriction of the inwall of nail head, makes two flanks as two chocks, wedges tightly in the slit between nail head inwall and the rod, thereby tightly bag pressure is lived rod, makes it and can not become flexible.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the assembled state generalized section of bone screw assembly of the present invention;
Fig. 2 is that the master of the assembled state of bone screw assembly of the present invention looks sketch map;
Fig. 3 is that the master of the section of locking nut of the present invention looks sketch map;
Fig. 4 is the schematic side view of locking nut of the present invention;
Fig. 5 is the schematic top plan view of locking nut of the present invention;
Fig. 6 is the generalized section of compact heap of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The embodiment of the invention provides a kind of bone screw assembly, and to shown in Figure 6, bone screw assembly comprises bone screw 1, rod 2 and locking nut 3 referring to Fig. 1.Described bone screw 1 comprises implantation portion 11 and nail head 12, and nail head 12 has an inner chamber 13, and an end of implantation portion 11 is connected the bottom of the inner chamber 13 of nail head 12.Described excellent 2 are arranged in the inner chamber 13 of nail head 12, and are placed on implantation portion 11 tops.Described locking nut 3 comprises nut head 31 and compact heap 32, and compact heap 32 is connected nut head 31 bottoms, and the bottom of compact heap 32 is provided with female part, and female part is pressed on the rod 2.
In an embodiment of the present invention, rod 2 is between compact heap 32 and implantation portion 11, and pressing the position of establishing rod 2 owing to compact heap 32 is female part, is not the plane, and therefore rod 2 can be locked for compacted at an easy rate 32; And rod 2 is under compacted situation, and rod 2 is in the female part of compact heap 32, therefore is not easy to become flexible.Several bone screw 1, rod 2 and locking nut 3 have been formed spinal internal fixation system, are fixed on patient's spinal column, correct, support patient's spinal column with help, and rod 2 can be locked positively, thereby have improved the stability of internal fixation of spine.
Wherein, bone screw 1 herein can be the nail of shaking the head, its implantation portion 11 can 360 in the inner chamber 13 of nail head 12 the smooth and easy rotation freely of degree, the maximum angle of its slewing area can reach 25 degree; In addition, bone screw 1 can also be a staple, and implantation this moment portion 11 then is in stationary state in the inner chamber of nail head 12.
As an embodiment of the invention, described female part can comprise that forming 322, two flanks 321 of recess between two 321, two flanks 321 of flank that are provided with at interval establishes rod 2 pressures into recess 322.That is to say that rod 2 is in the recess 322, and, so further improved the locking of rod 2 by two flank 321 blocks.
As an embodiment of the invention, the top distance between two flanks 321 is less than the bottom distance, that is, recess 322 is up-narrow and down-wide state.So rod 2 can be established in the recess 322 by pressure at an easy rate, and is limited by recess 322 narrower tops, makes rod 2 can positively be in the situation that is locked.Furthermore, two flanks 321 have elasticity, and " elasticity " herein is meant the increase along with nut 31 downward coupling mechanism forces, and two flanks 321 can be out of shape a little to both sides and open.After rod 2 pressures are established recess 322, increase along with nut 31 downward coupling mechanism forces, two flanks 321 are out of shape a little to both sides and open, and the outside of two flanks 321 is subjected to the restriction of the inwall of nail head 12, makes two flanks 321 as two chocks, wedges tightly in the slit between nail head 12 inwalls and the rod 2, thereby tightly bag pressure is lived rod 2, make it and can not become flexible, even how human body moves, rod 2 still is in the locking situation.
As an embodiment of the invention, form 10～30 ° of angles between two flanks 321, described angular range can allow to exist the error in the certain limit.Contrast after testing, the withdrawal force of measuring rod 2 under this kind locking state is about 2～10 times of withdrawal force under the plane contact locking state.
As an embodiment of the invention, cooperate Fig. 3 and shown in Figure 6, the top of compact heap 32 is provided with convex body 323, the bottom of nut head 31 is provided with concave volume 311, described convex body 323 is arranged in the concave volume, thereby nut head 31 and compact heap 32 are combined, and compact heap 32 does not rotate along with the rotation of nut head 31; Certainly, also concave volume can be set on the compact heap 32, nut head 31 can be provided with convex body, as long as nut head 31 can be combined with compact heap 32, and compact heap 32 can not rotate along with the rotation of nut head 31 and gets final product.
A kind of locking nut has also been proposed in the embodiment of the invention, about the concrete structure of this locking nut and beneficial effect referring to Fig. 1 to description embodiment illustrated in fig. 6, no longer repeat herein.
The above only is several embodiments of the present invention, and those skilled in the art can carry out various changes or modification to the embodiment of the invention and do not break away from the spirit and scope of the present invention according to application documents are disclosed.
Claims (10)
1. locking nut, it comprises nut head, it is characterized in that, and described locking nut also comprises the compact heap that is connected described nut head bottom, and the bottom of described compact heap is provided with female part.
2. locking nut according to claim 1 is characterized in that, described female part comprises two flanks that are provided with at interval, forms recess between two flanks.
3. locking nut according to claim 2 is characterized in that, the top distance between described two flanks is less than the bottom distance.
4. locking nut according to claim 3 is characterized in that, described two flanks are the rubber-like flank.
5. locking nut according to claim 4 is characterized in that, forms 10～30 ° of angles between described two flanks.
6. bone screw assembly, it comprises:
Bone screw, described bone screw comprises implantation portion and nail head, and described nail head has an inner chamber, and an end of described implantation portion is connected the bottom of the inner chamber of nail head;
Rod, described rod is arranged in the inner chamber of described nail head, and is placed on described implantation portion top;
It is characterized in that described bone screw assembly also comprises:
Locking nut, described locking nut comprise nut head and the compact heap that is connected described nut head bottom, and the bottom of described compact heap is provided with female part, and described female part is pressed on the described rod.
7. bone screw assembly according to claim 6 is characterized in that, described female part comprises two flanks that are provided with at interval, forms recess between two flanks; Described two flanks are pressed described rod and are established into recess.
8. bone screw assembly according to claim 7 is characterized in that, the top distance between described two flanks is less than the bottom distance.
9. bone screw assembly according to claim 8 is characterized in that, described two flanks are respectively the rubber-like flank.
10. bone screw assembly according to claim 9 is characterized in that, forms 10～30 ° of angles between described two flanks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910235604.3A CN101692983B (en) | 2009-09-29 | 2009-09-29 | Bone screw component and locking nut thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910235604.3A CN101692983B (en) | 2009-09-29 | 2009-09-29 | Bone screw component and locking nut thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101692983A true CN101692983A (en) | 2010-04-14 |
| CN101692983B CN101692983B (en) | 2013-07-31 |
Family
ID=42092011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910235604.3A Expired - Fee Related CN101692983B (en) | 2009-09-29 | 2009-09-29 | Bone screw component and locking nut thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101692983B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106580419A (en) * | 2017-01-11 | 2017-04-26 | 南京市第医院 | Bone screw for osteoporotic bone fixation |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2624841Y (en) * | 2002-09-16 | 2004-07-14 | 北京市春立正达科技开发有限公司 | Internal fixer for spine |
| US20070270832A1 (en) * | 2006-05-01 | 2007-11-22 | Sdgi Holdings, Inc. | Locking device and method, for use in a bone stabilization system, employing a set screw member and deformable saddle member |
| EP1891904B1 (en) * | 2006-08-24 | 2013-12-25 | Biedermann Technologies GmbH & Co. KG | Bone anchoring device |
| CN201505175U (en) * | 2009-09-29 | 2010-06-16 | 北京市奥斯比利克新技术开发有限公司 | Bone screw component and locking nut thereof |
-
2009
- 2009-09-29 CN CN200910235604.3A patent/CN101692983B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106580419A (en) * | 2017-01-11 | 2017-04-26 | 南京市第医院 | Bone screw for osteoporotic bone fixation |
| CN106580419B (en) * | 2017-01-11 | 2019-05-03 | 南京市第一医院 | A kind of bone screws for osteoporosis bone fixation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101692983B (en) | 2013-07-31 |
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| SE01 | Entry into force of request for substantive examination | ||
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Address after: 102401 No. 11 Baiyang Road, Liangxiang Township, Fangshan District, Beijing Patentee after: BONOVO ORTHOPEDICS, Inc. Address before: Room 915, Jiahui Court, Huaao Center, 31 Zizhuyuan Road, Haidian District, Beijing, 100089 Patentee before: Beijing Orthopedic Innovation Inc. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20210929 |