CN204618386U - A kind of medical universal nail - Google Patents
A kind of medical universal nail Download PDFInfo
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- CN204618386U CN204618386U CN201520114129.5U CN201520114129U CN204618386U CN 204618386 U CN204618386 U CN 204618386U CN 201520114129 U CN201520114129 U CN 201520114129U CN 204618386 U CN204618386 U CN 204618386U
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- screw
- universal
- nail
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Abstract
A kind of medical universal nail, it comprises a universal holder, and a universal ball end nail.Described universal holder comprises a through hole.Described through hole comprises one section of threaded section, one section of thread segment, and one and half ball-and-socket sections.Described universal ball end nail comprises a screw, and the spherical head that an axis along described screw is arranged.The minimum diameter of described thread segment is also less than the maximum gauge of described half ball-and-socket section while of being less than the minimum diameter of described threaded section.Described screw passes described through hole and described spherical head is housed in described half ball-and-socket section.The maximum gauge place of described spherical head is provided with the screw thread be coupled with the screw thread of thread segment.Described half ball-and-socket section is greater than the half of described spherical head along the axial length of screw along the axial length of screw.Medical universal nail of the present utility model only needs described universal holder and universal ball end to follow closely, thus crosses minimizing parts, reduces costs the object with operation easier, and also mitigates own wt simultaneously.
Description
Technical field
This utility model relates to a kind of orthopedic fixation device tool, particularly a kind of medical universal nail for being fixedly connected with the bone after fracture.
Background technology
Current, the operation method of spinal column, vertebra or thoracic vertebra surgery is constantly developing, and has also occurred the internal fixation device of various vertebra or thoracic vertebra thereupon, has mainly comprised various bone screw, hamulus of hamate bone, round metal bars and metallic plate etc.Wherein nail and hook belong to anchorage element, and rod and plate belong to connecting elements.In anchorage element, the application of bone screw is the most general, because it has very strong anchor force.But because the coaxial relationship of universal type vertebra or the nail rod locking mechanism of thoracic screw and the central shaft of bone screw nail bar is adjustable within limits, therefore application is more at present, but several universal bone screw conventional at present all has respective pluses and minuses, because the screw rod solid section of various ten thousand screws is consistent cylindrical of upper and lower diameter with regard to shortcoming, cause screw cervical region comparatively thin, lack enough intensity.Because thread tooth is common profile of tooth, also inadequate with the adhesion of sclerotin.The locking plug screw particularly following closely excellent connecting portion, owing to adopting standard thread, easily causes nail tail to be made locking plug lack enough coupling mechanism forces and anti-loosening effect by bulging.
For solving the problem, the patent No. is 201220616912.8, and patent name is that a kind of Multiaxial universal nail provides a kind of medical universal nail for spinal column or vertebra, thoracic vertebra.As shown in Figure 1, described Multiaxial universal nail comprises a universal holder 1, universal ball end nail 2, the universal nail collar 3, and a rivet 4.Described universal ball end nail 2 has a nail tip 5.Described universal ball end nail 2 is arranged in universal holder 1, and the universal nail collar 3 is positioned at universal holder 1, and follows closely 2 with universal ball end and contact to support described universal ball end and follow closely 2.The relative position that described rivet 4 avoids its activity to cause universal ball end to follow closely 2 for the fixing described universal nail collar 3 is not fixed.
Although above-mentioned Multiaxial universal nail can solve coupling mechanism force and universal ball end follows closely 2 problems loosened, the parts of this Multiaxial universal nail are more, increase cost and operation easier.Add the dimension and weight of Multiaxial universal nail simultaneously because parts are more, negative effect is caused to bone surgery.
Utility model content
In view of this, be necessary the medical universal nail providing a kind of parts less, to overcome above-mentioned deficiency.
A kind of medical universal nail, it comprises a universal holder, and a universal ball end nail be arranged in described universal holder.Described universal holder comprises a through hole.Described through hole comprises one section of threaded section, one section of thread segment be axially connected with this threaded section, and one section of half ball-and-socket section be axially connected with described thread segment.Described universal ball end nail comprises a screw, and the spherical head that an axis along described screw is arranged.The minimum diameter of described thread segment is also less than the maximum gauge of described half ball-and-socket section while of being less than the minimum diameter of described threaded section.Described screw passes described through hole and described spherical head is housed in described half ball-and-socket section.The maximum gauge place of described spherical head is provided with the screw thread be coupled with the screw thread of thread segment.Described half ball-and-socket section is greater than the half of described spherical head along the axial length of screw along the axial length of screw.
Compared with prior art, because the through hole of described universal holder has described thread segment, and the spherical head of universal ball end nail offers described screw thread, again because be also less than the maximum gauge of described half ball-and-socket section while that the minimum diameter of described thread segment being less than the minimum diameter of described threaded section, when described spherical head rotates into half ball-and-socket section from thread segment, this spherical head namely can at this half ball-and-socket Duan Zhongzuo Universal active.Meanwhile, due to the screw thread and thread segment that only have described spherical head screw thread couple and when rotating, described universal ball end nail just can depart from from universal holder, and this coupling and rotate involuntary can not for also.Therefore, medical universal nail of the present utility model only needs described universal holder and universal ball end to follow closely, thus crosses minimizing parts, reduces costs the object with operation easier, and also mitigates own wt simultaneously.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described, wherein:
Fig. 1 is the structural representation of a kind of Multiaxial universal nail of the prior art.
The decomposition texture schematic diagram of a kind of medical universal nail that Fig. 2 this utility model provides.
Fig. 3 is the sectional structure schematic diagram of the universal holder of the medical universal nail of Fig. 2.
The medical universal nail that Fig. 4 is Fig. 2 have another kind of universal ball end nail structural representation.
Detailed description of the invention
Based on accompanying drawing, specific embodiment of the utility model is further elaborated below.Should be appreciated that specific embodiment described herein is only as embodiment, and be not used in restriction protection domain of the present utility model.
Refer to Fig. 2 and Fig. 3, the decomposition texture schematic diagram of its a kind of medical universal nail 100 provided for this utility model.Described medical universal nail 100 comprises a universal holder 10, and a universal ball end nail 20 be arranged in this universal holder 10.This medical universal nail 100 can be made of metal, and in the present embodiment, described medical universal nail 100 is made up of titanium alloy.
Described universal holder 10 can be one cylindrical, also can be other shapes, and as spherical etc., it sets, as needing of placement location according to medical needs.In the present embodiment, described universal holder 10 is one cylindrical.Described universal holder 10 comprises a through hole 11, and the U-lag 12 that crossing with this through hole 11.The centrage of described through hole 11 overlaps with columniform centrage.It is understood, however, that the centrage of described through hole 11 also can not overlap with columniform centrage according to actual needs.The minimum diameter of described through hole 11 entirety should can be as the criterion through described whole described universal ball end nail 20.Described through hole 11 comprises the half ball-and-socket section 113 that one section of threaded section 111, a section is axially connected with described thread segment 112 with the thread segment 112, a section that this threaded section 111 is axially connected.Namely described thread segment 112 is folded between described threaded section 111 and half ball-and-socket section 113.Described threaded section 111 may be used for connecting other medical equipments, if it is understood, however, that when not connecting other equipment, this threaded section 111 can not be arranged.The weight that this threaded section 111 can alleviate whole medical universal nail 100 is further set in addition.Described thread segment 112 is provided with the screw thread for screwing in described universal ball end nail 20.The minimum diameter of this thread segment 112 is also less than the maximum gauge of described half ball-and-socket section 113 while of being less than the minimum diameter of described threaded section 111, to make, when described universal ball end nail 20 enters half ball-and-socket section 113, to skid off from this thread segment 112 when thread segment 112 can stop described universal ball end to follow closely 20.Described half ball-and-socket section 113 is for the spherical head 22 of accommodating following multi-directional ball nail 20.In order to make described universal ball end follow closely 20 spherical head 22 can be freely movable in described half ball-and-socket section 113, described half ball-and-socket section 113 is at least greater than described spherical head 22 along the axial length of the screw 21 of following universal ball end nail 20 also may equal the axial length of described spherical head 22 along screw 21 along the half of the axial length of screw 21.The maximum gauge of described half ball-and-socket section 113 at least should be suitable with the maximum gauge of described spherical head 22, or be greater than the maximum gauge of described spherical head 22.The minimum diameter of described half ball-and-socket section 113 should be suitable with the diameter of screw 21.If make the range of activity of described universal ball end nail 20 larger, then the minimum diameter of described half ball-and-socket section 113 should be greater than the diameter of screw 21, but the maximum gauge of this half ball-and-socket section 113 must be less than the maximum gauge of described spherical head 22, skid off from the minimum diameter end of half ball-and-socket section 113 to avoid described spherical head 22.Described U-lag 12 can alleviate the weight of this universal holder 10 further.It should be noted that, in order to draw convenient and absolutely prove this utility model, in fig. 2, only universal holder 10 is analysed and observe.
Described universal ball end nail 20 comprises a screw 21 as mentioned above, and the spherical head 22 that an axis along described screw 21 is arranged.Described screw 21 is for being screwed in bone, and it can be tapping screw, and the screw thread that it is offered can for the gradually deep thread from spherical head 22 to free end, and this contributes to the coupling mechanism force of described universal ball end nail 20 and bone.It is appreciated of course that according to medical needs, described screw 21 can plain screw, and also screw thread also can be regular screw threads.Described spherical head 22 is provided with the screw thread 221 be coupled with the screw thread of thread segment 112 at its maximum gauge place, and is also provided with spanner Access Division 222 in the axial side of free end.Described spherical head 22 can be a spherical structure, and as shown in Figure 2, can be also hemisphere for two ends, centre be the club shaped structure of cylinder, as shown in Figure 4.When described spherical head 22 is spherical structure, the screw thread 221 that it is offered is at least a circle.And in order to increase the reliability of described universal ball end nail 20, namely prevent described spherical head 22 from skidding off from described thread segment 112, described spherical head 22 can be above-mentioned club shaped structure, and described screw thread 221 is arranged on the whole cylinder of described centre.Now, described half ball-and-socket section 113 at least should equal described spherical head 22 along the length of axially described cylinder of screw 21 and the length sum of hemisphere along the axial length of screw 21 of described universal ball end nail 20.Described spanner Access Division 222 comprises at least two spaced draw-in grooves of central shaft around described screw 21.In the present embodiment, described spanner Access Division 222 comprises four spaced draw-in grooves of central shaft around described screw 21.Described multi-directional ball nail 20 is screwed in bone for being beneficial to a kind of special spanner by described spanner Access Division 222.
When assembling, first described universal ball end nail 20 is inserted from the threaded section 111 of the through hole 11 of universal holder 10, until described spherical head 22 touches the thread segment 112 of through hole 11.Now, the spanner that spanner should be used to rotate described spherical head 22 meets portion 222, the screw thread 221 of spherical head 22 is coupled, until described screw thread 221 enters half ball-and-socket section 113 completely and makes described spherical head 22 be housed in described half ball-and-socket section 113 with the thread segment 112 of spiral shell through hole 11.Now, the screw thread 221 of spherical head 22 departs from the thread segment 112 of spiral shell through hole 11 and is coupled, and completes the assembling of described medical universal nail 100.
Compared with prior art, because the through hole 111 of described universal holder 10 has described thread segment 112, and the spherical head 22 of universal ball end nail 20 offers described screw thread 221, again because be also less than the maximum gauge of described half ball-and-socket section 113 while that the minimum diameter of described thread segment 112 being less than the minimum diameter of described threaded section 111, when described spherical head 22 rotates into half ball-and-socket section 113 from thread segment 112, namely this spherical head 22 can make Universal active in this half ball-and-socket section 113.Meanwhile, due to the screw thread 221 with thread segment 112 that only have described spherical head 22 screw thread couple and when rotating, described universal ball end nail 20 just can depart from from universal holder 10, and this coupling to rotate involuntary can not be also.Therefore, the described universal holder 10 of medical universal nail of the present utility model 100 needs follows closely 20 with universal ball end, thus crosses minimizing parts, reduces costs the object with operation easier, and also mitigates own wt simultaneously.
The foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all do in spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included in protection domain of the present utility model.
Claims (10)
1. a medical universal nail, it comprises a universal holder, and a universal ball end nail be arranged in described universal holder, it is characterized in that: described universal holder comprises a through hole, described through hole comprises one section of threaded section, one section of thread segment be axially connected with this threaded section, and one section of half ball-and-socket section be axially connected with described thread segment, described universal ball end nail comprises a screw, and the spherical head that an axis along described screw is arranged, the minimum diameter of described thread segment is also less than the maximum gauge of described half ball-and-socket section while of being less than the minimum diameter of described threaded section, described screw is through described through hole and described spherical head is housed in described half ball-and-socket section, the maximum gauge place of described spherical head is provided with the screw thread be coupled with the screw thread of thread segment, described half ball-and-socket section is greater than the half of described spherical head along the axial length of screw along the axial length of screw.
2. medical universal nail as claimed in claim 1, is characterized in that: described universal holder is cylindrical, and the centrage of described through hole overlaps with columniform centrage.
3. medical universal nail as claimed in claim 1, is characterized in that: described spherical head be one spherical.
4. medical universal nail as claimed in claim 3, is characterized in that: the screw thread in described spherical head comprises at least one circle.
5. medical universal nail as claimed in claim 1, is characterized in that: the two ends of described spherical head are hemisphere, and centre is the club shaped structure of cylinder.
6. medical universal nail as claimed in claim 5, is characterized in that: described half ball-and-socket section equals the axial length of described spherical head along screw along the axial length of screw, and described screw thread is arranged on whole cylinder.
7. medical universal nail as claimed in claim 1, is characterized in that: described screw is a kind of tapping screw.
8. medical universal nail as claimed in claim 1, is characterized in that: the screw thread on described screw is the gradually deep thread from spherical head to free end.
9. medical universal nail as claimed in claim 1, is characterized in that: described spherical head has a spanner Access Division, and described spanner Access Division comprises at least two spaced draw-in grooves of the central shaft around described screw.
10. medical universal nail as claimed in claim 9, is characterized in that: described spanner Access Division comprises four spaced draw-in grooves of the central shaft around described screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520114129.5U CN204618386U (en) | 2015-02-10 | 2015-02-10 | A kind of medical universal nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520114129.5U CN204618386U (en) | 2015-02-10 | 2015-02-10 | A kind of medical universal nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204618386U true CN204618386U (en) | 2015-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520114129.5U Withdrawn - After Issue CN204618386U (en) | 2015-02-10 | 2015-02-10 | A kind of medical universal nail |
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| Country | Link |
|---|---|
| CN (1) | CN204618386U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105982728A (en) * | 2015-02-10 | 2016-10-05 | 焦作市新港医疗设备有限公司 | Medical universal nail |
-
2015
- 2015-02-10 CN CN201520114129.5U patent/CN204618386U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105982728A (en) * | 2015-02-10 | 2016-10-05 | 焦作市新港医疗设备有限公司 | Medical universal nail |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150909 Effective date of abandoning: 20180119 |
|
| AV01 | Patent right actively abandoned |