CN204133596U - A kind of synthetism Wicresoft locking device - Google Patents
A kind of synthetism Wicresoft locking device Download PDFInfo
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- CN204133596U CN204133596U CN201420570605.XU CN201420570605U CN204133596U CN 204133596 U CN204133596 U CN 204133596U CN 201420570605 U CN201420570605 U CN 201420570605U CN 204133596 U CN204133596 U CN 204133596U
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Abstract
The utility model discloses a kind of synthetism Wicresoft locking device, comprise lockplate and lock screw, four lateral layout of head of a nail cap body are arc surface, the external diameter of this arc surface is from top to bottom for reduce gradually, and head of a nail screw thread design is circular thread, the external diameter of this circular thread is from top to bottom for also to reduce gradually; Locking screw and screw thread then suitable with the head of a nail.Adopt circular thread; effectively can increase initial stability; improve anti-rotation performance; thus can reduce to cause due to fine motion move back nail risk; and more effectively can decompose cutting force, make stressed more even, protection thread; reduce the generation loosening, rupture of lockplate or lock screw, thus ensure that internal fixtion is more stable.
Description
Technical field
This utility model relates to operating theater instruments, more particularly, relates to a kind of synthetism Wicresoft locking device.
Background technology
At present, common synthetism Wicresoft locking device generally comprises lockplate and lock screw, lockplate has locking screw and non-locking screw, is screwed into for different screw.Lockplate be fixedly do not rely on bone frictional force to realize connection, but rely on the interlocking structure of lockplate self to realize completely.Lockplate and bone surface can leave certain interval, eliminate the ill effect that lockplate contacts with bone weight, greatly improve growth and the recovery of blood fortune and periosteum.And lock screw is tapping screw, can without tapping or bone drill; Without plus-pressure between lockplate and cortical bone, pressure is not produced to periosteum, thus the blood fortune of protection periosteum; Surgical technic can meet the requirement of Micro-operation, the blood fortune of fracture local can be protected well, and then do not need bone grafting to operate; Inner fixed support flexible fastening, deposits in case in load, has stress stimulation between sclerite, and this stimulation is conducive to callus formation, is conducive to union of fracture.
Because tapered tread (also known as dry sealing thread) is compared with cylindrical thread, there is the advantage of good airproof performance, therefore be widely used on the head of a nail of lock screw, namely the head of a nail cap body of existing lock screw generally adopts conical structure, and its surface is provided with tapered tread, make whole head of a nail outer rim conically, and the locking screw that lockplate is opened also adopts corresponding conical screw, tighten by coordinating with lock screw, as shown in Figure 1, publication number is that namely the Chinese patent of 103720507A adopts this type of tapered tread 1.But, find in actual clinical process, circular cone texture is when engaging with locking screw, and initial stability is poor, easily grinds one's teeth, and anti-rotation performance is poor, can cause because of fine motion and move back nail, once the deviation between lock screw and lockplate is more than 10 °, the cutting between lockplate and lock screw can be caused, loosening, the fracture of lockplate or lock screw can be caused time serious, finally cause and fix unsuccessfully.
In addition, the tapered tread of the existing lock screw head of a nail generally all adopts double thread, in order to guarantee lock screw synchronously entering in bone and on lockplate.But, no matter be from screw-in speed or intensity, also have the space of improving further.
Utility model content
For the above-mentioned shortcoming existed in prior art; the purpose of this utility model is to provide a kind of synthetism Wicresoft locking device; employing circular thread designs; not only can increase initial stability and anti-rotation performance; thus nail risk is moved back in reduction; but also cutting force can be carried out decomposing and shifting, protection thread, improves the stability of whole locking device.
For achieving the above object, this utility model adopts following technical scheme:
This synthetism Wicresoft locking device, comprise lockplate and lock screw, lockplate is provided with several locking screw, lock screw comprises screw rod and the head of a nail, the head of a nail is provided with and the screw thread locking screw and be meshed, and four lateral layout of described head of a nail cap body are arc surface, and the external diameter of this arc surface is from top to bottom for reduce gradually, and head of a nail screw thread design is circular thread, the external diameter of this circular thread is from top to bottom for also to reduce gradually; Described locking screw inwall is also designed to the arc surface corresponding to cap body, and its screw thread is also designed to the circular thread that matches with head of a nail screw thread.
The locking screw of described lockplate comprises single hole screw, and its inwall is designed to the arc surface corresponding to cap body, and its screw thread is also designed to the circular thread matched with head of a nail screw thread.
The locking screw of described lockplate also comprises 8-shaped hole, this 8-shaped hole comprises arc counterbore and a screwed hole, screwed hole and arc counterbore are side by side and be connected, and the inwall of screwed hole is designed to the arc surface corresponding to cap body, its screw thread is also designed to the circular thread matched with head of a nail screw thread.
Described arc surface and the radian of circular thread are π/10, and radius is 8 ~ 20mm.
The circular thread of the described head of a nail and locking screw is designed to multi start thread.
Described circular thread is triple thread.
The two ends of described lockplate are also respectively equipped with Kirschner wire locating hole, and bottom is also provided with several relief groove.
Screw thread on described screw rod is single thread, and screw head is in the taper shape with cutting edge.
In technique scheme, synthetism Wicresoft of the present utility model locking device comprises lockplate and lock screw, four lateral layout of head of a nail cap body are arc surface, the external diameter of this arc surface is from top to bottom for reduce gradually, and head of a nail screw thread design is circular thread, the external diameter of this circular thread is from top to bottom for also to reduce gradually; Locking screw and screw thread then suitable with the head of a nail.Adopt circular thread; can under the prerequisite ensureing sealing property; effective increase initial stability; improve anti-rotation performance, thus can reduce to cause due to fine motion move back nail risk, and more effectively can decompose cutting force; make stressed more even; protection thread, reduces the generation loosening, rupture of lockplate or lock screw, thus ensures that internal fixtion is more stable.In addition, adopt multi start thread, quick screw-in can be played, simplify the operation, reduce operating time, and be more conducive to the strength and stability improving nut.
Accompanying drawing explanation
Fig. 1 is the structural representation of the bone-fracture fixation steel plate screw location-plate of prior art;
Fig. 2 is the axonometric chart of synthetism Wicresoft of the present utility model locking device;
Fig. 3 is the sectional view of Fig. 2;
Fig. 4 is the schematic perspective view of lock screw of the present utility model;
Fig. 5 is the sectional view of Fig. 3;
Fig. 6 is the upward view of Fig. 4;
Fig. 7 is the schematic perspective view of lockplate of the present utility model;
Fig. 8 is the sectional view of Fig. 7.
Detailed description of the invention
The technical solution of the utility model is further illustrated below in conjunction with drawings and Examples.
Refer to shown in Fig. 2 ~ Fig. 3, what synthetism Wicresoft of the present utility model locking device was same as the prior art is, equally also comprise lockplate 10 and lock screw 20, lockplate 10 is provided with several locking screw 11, lock screw 20 comprises screw rod 21 and is located at the head of a nail 22 of screw rod 21 end, and the head of a nail 22 is provided with and the screw thread locking screw 11 and be meshed.Shown in Fig. 4 ~ Fig. 8, with prior art difference be, four lateral layout of the described head of a nail 22 cap body are arc surface, the external diameter of this arc surface is from top to bottom for reduce gradually, and this head of a nail screw thread 23 is designed to circular thread, and the external diameter of this circular thread is from top to bottom also for reduce gradually accordingly, in Figure 5, the both sides of the edge, cross section of this head of a nail screw thread are that R is radius, and ∠ AOB is the circular arc line of α with O point for the center of circle respectively; Described locking screw 11 inwall is also designed to the arc surface corresponding to cap body, and its screw thread 12 is also designed to the circular thread (see Fig. 8) that matches with head of a nail screw thread 23.Adopt above-mentioned arc surface and circular thread design; can under the prerequisite ensureing sealing property; effective increase initial stability; improve anti-rotation performance, thus can reduce to cause due to fine motion move back nail risk, and more effectively can decompose cutting force; make stressed more even; protection thread, reduces the generation loosening, rupture of lockplate 10 or lock screw 20, thus ensures that internal fixtion is more stable.
As an embodiment, the locking screw 11 of described lockplate 10 can according to difference in functionality and demand, comprise single hole screw 111, its inwall is designed to the arc surface corresponding to cap body, its screw thread is also designed to the circular thread matched with head of a nail screw thread 23, also 8-shaped hole can be comprised, this 8-shaped hole 112 comprises an arc counterbore 112a and screwed hole 112b, screwed hole 112b is set up in parallel with arc counterbore 112a and is laterally connected, and the inwall of screwed hole 112b is designed to the arc surface corresponding to cap body, its screw thread is also designed to the circular thread matched with head of a nail screw thread 23.
It should be noted that at this, above-mentioned arc counterbore 112a for button 2 (see Fig. 1, Fig. 3) with the use of: in 8-shaped hole 112, button 2 the arc counterbore 112a sidespin away from screwed hole 112b to the marrow in, its bulb breaks away to the arc counterbore 112a near screwed hole 112b in the cambered surface of arc counterbore 112a, thus the pressurization realized fracture, produce stress and utilize bone growth.
By lot of experiments with repeatedly test, the above-mentioned head of a nail 22 and the locking arc surface of screw 11, the radian of circular thread are designed to π/10, and radius is 8 ~ 20mm.
As another embodiment, the circular thread of the described head of a nail 22 and locking screw 11 is designed to multi start thread, quick screw-in can be played, simplify the operation, reduce operating time, and be more conducive to the strength and stability improving nut.This multi start thread can adopt triple thread, quadruple thread or other multi start threads, generally gets triple thread for better.
In addition, the two ends of described lockplate 10 are also respectively equipped with Kirschner wire locating hole 13, bottom is also provided with several relief groove 14, screw thread on described screw rod 21 is single thread, and screw rod 21 head is in the taper shape with cutting edge 24, the Cutting Edge Design in Fig. 6 is along equally distributed three of screw rod 21 head circumference.
In sum, adopt synthetism Wicresoft of the present utility model locking device, there is following multiple beneficial effect:
1, adopt circular thread design, under the prerequisite ensureing sealing property, effectively can increase initial stability, improve anti-rotation performance, thus can reduce to cause due to fine motion move back nail risk.
2, coordinated by circular thread, more effectively can decompose cutting force, make the stressed more even of the screw head of a nail 22, protect thread, effectively can reduce the generation loosening, rupture of lockplate 10 or lock screw 20, thus ensure that internal fixtion is more stable.
3, adopt the head of a nail 22 screw thread to adopt multi start thread design, quick screw-in can be played, simplify the operation, save operating time, and be more conducive to the strength and stability improving nut.
4, there is the advantages such as simple, easy to process, the low incisura of structure and quick lock in.
Those of ordinary skill in this technology will be appreciated that, above embodiment is only used to this utility model is described, and be not used as restriction of the present utility model, as long as in spirit of the present utility model, all will drop in Claims scope of the present utility model the change of the above embodiment, modification.
Claims (8)
1. a synthetism Wicresoft locking device, comprises lockplate and lock screw, and lockplate is provided with several locking screw, and lock screw comprises screw rod and the head of a nail, and the head of a nail is provided with and the screw thread locking screw and be meshed, and it is characterized in that:
Four lateral layout of described head of a nail cap body are arc surface, and the external diameter of this arc surface is from top to bottom for reduce gradually, and head of a nail screw thread design is circular thread, and the external diameter of this circular thread is from top to bottom for also to reduce gradually; Described locking screw inwall is also designed to the arc surface corresponding to cap body, and its screw thread is also designed to the circular thread that matches with head of a nail screw thread.
2. synthetism Wicresoft as claimed in claim 1 locking device, is characterized in that:
The locking screw of described lockplate comprises single hole screw, and its inwall is designed to the arc surface corresponding to cap body, and its screw thread is also designed to the circular thread matched with head of a nail screw thread.
3. synthetism Wicresoft as claimed in claim 2 locking device, is characterized in that:
The locking screw of described lockplate also comprises 8-shaped hole, this 8-shaped hole comprises arc counterbore and a screwed hole, screwed hole and arc counterbore are side by side and be connected, and the inwall of screwed hole is designed to the arc surface corresponding to cap body, its screw thread is also designed to the circular thread matched with head of a nail screw thread.
4. the synthetism Wicresoft locking device according to any one of claims 1 to 3, is characterized in that:
Described arc surface and the radian of circular thread are π/10, and radius is 8 ~ 20mm.
5. synthetism Wicresoft as claimed in claim 1 locking device, is characterized in that:
The circular thread of the described head of a nail and locking screw is designed to multi start thread.
6. synthetism Wicresoft as claimed in claim 4 locking device, is characterized in that:
Described circular thread is triple thread.
7. synthetism Wicresoft as claimed in claim 1 locking device, is characterized in that:
The two ends of described lockplate are also respectively equipped with Kirschner wire locating hole, and bottom is also provided with several relief groove.
8. synthetism Wicresoft as claimed in claim 1 locking device, is characterized in that:
Screw thread on described screw rod is single thread, and screw head is in the taper shape with cutting edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420570605.XU CN204133596U (en) | 2014-09-29 | 2014-09-29 | A kind of synthetism Wicresoft locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420570605.XU CN204133596U (en) | 2014-09-29 | 2014-09-29 | A kind of synthetism Wicresoft locking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204133596U true CN204133596U (en) | 2015-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420570605.XU Expired - Fee Related CN204133596U (en) | 2014-09-29 | 2014-09-29 | A kind of synthetism Wicresoft locking device |
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| Country | Link |
|---|---|
| CN (1) | CN204133596U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109998654A (en) * | 2019-04-29 | 2019-07-12 | 广东施泰宝医疗科技有限公司 | Minimal invasion double-locking external fixation system |
| CN111053605A (en) * | 2019-10-29 | 2020-04-24 | 黄长明 | Device for acromioclavicular joint treatment |
| WO2023109432A1 (en) * | 2021-12-17 | 2023-06-22 | 苏州景昱医疗器械有限公司 | Skull pin and brain electrode fixation assembly |
-
2014
- 2014-09-29 CN CN201420570605.XU patent/CN204133596U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109998654A (en) * | 2019-04-29 | 2019-07-12 | 广东施泰宝医疗科技有限公司 | Minimal invasion double-locking external fixation system |
| CN111053605A (en) * | 2019-10-29 | 2020-04-24 | 黄长明 | Device for acromioclavicular joint treatment |
| WO2023109432A1 (en) * | 2021-12-17 | 2023-06-22 | 苏州景昱医疗器械有限公司 | Skull pin and brain electrode fixation assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20150204 |