CN204814131U - Universal locking system of skeleton internal fixation - Google Patents
Universal locking system of skeleton internal fixation Download PDFInfo
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- CN204814131U CN204814131U CN201520231908.3U CN201520231908U CN204814131U CN 204814131 U CN204814131 U CN 204814131U CN 201520231908 U CN201520231908 U CN 201520231908U CN 204814131 U CN204814131 U CN 204814131U
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- universal
- snap ring
- screw
- described universal
- lock system
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Abstract
The utility model discloses an universal locking system of skeleton internal fixation, universal locking system of skeleton internal fixation is including the steel sheet and the screw of mutually supporting, universal screw hole and universal snap ring have on the steel sheet, the inner wall of universal screw hole is the sphere of indent, the outer wall of universal snap ring is the sphere, universal snap ring gomphosis in in the universal screw hole, the inner wall of universal snap ring has the internal thread, the head of screw has the external screw thread, the external screw thread of screw head with the interior thread to match of universal snap ring closes. The utility model discloses a set up universal snap ring in universal screw hole, with the screw with universal snap ring cooperatees, and then realization bone screw's is universal. The utility model discloses an universal locking system of skeleton internal fixation is guaranteeing skeletal fastening intensity, when realizing effectively locking between screw and the steel sheet, and the universal function of realization screw.
Description
Technical field
This utility model relates to operating theater instruments, particularly relates to a kind of skeleton internal fixtion universal lock system.
Background technology
In the treatment of clinical common and multiple orthopaedic disease, as fracture repair etc., usual employing steel plate screw fixing system fixes fracture so that the injury of the bone comparatively fast heals, first steel plate is placed in the fracture after reset, to screw on screw and be fixedly connected with the injury of the bone, thus make steel plate firmly be fixed on fracture.
In existing steel plate screw fixing system, steel plate and screw adopt routine to lay and fixed form, cannot regulate the angle of needs.In reality, multiple fracture more complicated, when the fracture that fixing this complexity is special, there is bright front shortcoming in it: for fracture and the comminuted fracture of irregular skeleton, need many places fixation steel plate, and each steel plate is independently fixed system, fixing being difficult in many places reasonably lays steel plate; Existing line style steel plate screw fixing system belongs to two-dimensional solid mould-fixed, and multiple fracture to need to carry out three-dimensional fixing, as pelvis, distal radius, the complicated fracture at the complex-shaped position such as distal humerus, the air spots of skeleton is sliding, adopts laying of two-dimensional solid mould-fixed line style steel plate more difficult, needs to carry out bending etc. to steel plate moulding to adapt to bone surface shape, add operation difficulty, bending steel plate also reduces armor plate strength simultaneously; Its direction that fractures of most fracture is most and steel plate placement direction angle of inclination is larger, because screw is in stays, now steel plate screwing installing hole is elongated hole, as slotted eye, so that oblique being screwed in skeleton of screw achieves a fixed connection, elongated hole processed by steel plate, screw and steel plate can be made can not to closely cooperate at screw mounting hole place, thus affect the steadiness of steel plate; Plate size is larger, require that fracture will fully appear, namely to there be enough spaces that steel plate is placed on fracture, then when the special fractures of fixing reduced size, also the larger wound surface that suitable steel plate is placed must be cut on patient's fracture skin, add the misery of patient and the time of wound healing, the interim reset of isochrone shape steel plate to fracture requires also higher; Existing steel plate screw fixing system, is generally first carry out interim replacement and fixation to fracture portions, then places steel plate, then fracture portions steel plate connects by stubborn screw, and flow process is more complicated, and constant intensity is not enough sometimes.
Address these problems, need firm plate while proof strength, reduce firm plate thickness as much as possible, and good lock function can be realized, and screw needs to have gimbal function, select once the operation of doctor in operation.
Therefore, those skilled in the art is devoted to, under the prerequisite of the convenience at the fastening effect and use that ensure skeleton inner fixing device, to realize the universal of bone screw, to expand the range of application of skeleton inner fixing device.
Utility model content
For the design shortcoming of skeleton inner fixing device in prior art, this utility model is mainly in order to solve existing skeleton inner fixing device complex structure, high and that particularly bone screw can not the be universal technical problem of difficulty of processing.
For achieving the above object, this utility model provides a kind of skeleton internal fixtion universal lock system, described skeleton internal fixtion universal lock system comprises the steel plate and screw that cooperatively interact, described steel plate have Universal screw nail hole and universal snap ring, the inwall in described Universal screw nail hole is the sphere of indent, the outer wall of described universal snap ring is sphere, and described universal snap ring is embedded in described Universal screw nail hole
The inwall of described universal snap ring has female thread, and the head of described screw has external screw thread, and the external screw thread of described screw head and the female thread of described universal snap ring match.
Preferably, the outer wall of described universal snap ring is provided with microgroove.
Preferably, the female thread tapering on the inwall of described universal snap ring.More preferably, described tapering size is α, 10 ° >=α >=6 °.
Preferably, described universal snap ring has breach or the gap of a longitudinal direction.
Preferably, described universal snap ring outer wall has at least one longitudinal fluting.
Preferably, described steel plate also comprises limited bolt, described Universal screw nail hole inwall is provided with stopper slot, after the groove of described universal snap ring aims at described stopper slot, described limited bolt is inserted in described stopper slot, described limited bolt snaps in the groove of described stopper slot and described universal snap ring, thus limits described universal snap ring and rotate along described Universal screw nail hole.
Preferably, described universal snap ring has a breach, described steel plate also comprises limited bolt, described Universal screw nail hole inwall is provided with stopper slot, when described universal snap ring notch alignment described in after stopper slot, inserted by described limited bolt in described stopper slot, described limited bolt snaps in the breach of described stopper slot and described universal snap ring, thus limits described universal snap ring and rotate along described Universal screw nail hole.
Preferably, the external screw thread of the head of described screw is tapered thread.
Preferably, limited bolt is cylindric, has chamfering at the two ends of described limited bolt.
Preferably, described skeleton internal fixtion universal lock system is made up of the biocompatible material being selected from lower group: titanium, titanium alloy, rustless steel, novel absorbable material.
Preferably, the skeleton in this utility model comprises phalanges, metacarpal bone, Plantar bone, carpal bone or child's skeleton.
Technique effect
Screw, by arranging universal snap ring in Universal screw nail hole, matches with described universal snap ring, and then realizes the universal of bone screw by this utility model.
Skeleton internal fixtion universal lock system of the present utility model, is ensureing the fastening strength to skeleton, while realizing effectively locking between screw and steel plate, achieves the gimbal function of screw.
Be described further below with reference to the technique effect of accompanying drawing to design of the present utility model, concrete structure and generation, to understand the purpose of this utility model, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the skeleton internal fixtion universal lock system structure schematic diagram of a preferred embodiment of the present utility model;
Fig. 2 is the steel plate partial schematic diagram of a preferred embodiment of the present utility model;
Fig. 3 is II portion enlarged drawing in Fig. 2;
Fig. 4 is the Universal screw nail hole A-A generalized section in Fig. 3;
Fig. 5 is the universal snap ring cut-away view of a preferred embodiment of the present utility model;
Fig. 6 is the universal snap ring planar structure schematic diagram of a preferred embodiment of the present utility model;
Fig. 7 is the universal snap ring planar structure schematic diagram of another preferred embodiment of the present utility model;
Fig. 8 is I portion enlarged drawing in Fig. 5;
Fig. 9 is the limited bolt structural representation of a preferred embodiment of the present utility model.
Detailed description of the invention
As shown in Figure 1,2,3, 4, skeleton internal fixtion universal lock system in the present embodiment, comprise the steel plate 1 and screw 2 that cooperatively interact, described steel plate 1 have Universal screw nail hole 11 and universal snap ring 12, described Universal screw nail hole 11 inwall is the sphere of indent, the outer wall of described universal snap ring 12 is sphere, described universal snap ring 12 is embedded in described Universal screw nail hole 11, at External Force Acting, described universal snap ring 12 can relatively described Universal screw nail hole 11 inwall transverse rotation or longitudinally globally slide.
As shown in Fig. 5,6,7, the inwall of described universal snap ring 12 has female thread, and the head of described screw 2 has external screw thread, and external screw thread and the described female thread of described screw head match.Female thread tapering on the inwall of described universal snap ring 12.Described tapering size is α, 10 ° >=α >=6 °, through test repeatedly, and guarantee screw that can be best in this range of taper universal.Preferably, the female thread of described universal snap ring 12 is three-start screw.
The outer wall of described universal snap ring 12 can be smooth, also can arrange microgroove 123, as shown in Figure 8, to strengthen the frictional force with Universal screw nail hole 11 inwall.
As shown in Figure 6, described universal snap ring 12 has breach or the gap 121 of a longitudinal direction.Due to the existence in breach or gap 121, when the head 21 of screw 2 screws in described universal snap ring 12, strut described universal snap ring 12, thus make universal snap ring 12 be embedded in the sphere of Universal screw nail hole 11 indent closely, on the one hand prevent described universal snap ring 12 from deviating from described Universal screw nail hole 11, realize the relative fixing of universal snap ring 12 and described Universal screw nail hole 11 on the other hand.
In the present embodiment, as shown in Figure 6, described universal snap ring 12 outer wall also has at least one longitudinal fluting 122.Described steel plate 1 also comprises limited bolt 13, as shown in Figure 3, described Universal screw nail hole 11 inwall is provided with stopper slot 111, universal snap ring 12 is adjusted in use procedure, after the groove 122 of described universal snap ring 12 aims at described stopper slot 111, inserted by described limited bolt 13 in described stopper slot 111, described limited bolt 13 snaps in the groove 122 of described stopper slot 111 and described universal snap ring 12, thus limits described universal snap ring 12 and rotate along described Universal screw nail hole 11.In the present embodiment, described universal snap ring 12 outer wall can arrange 2,3 or 4 longitudinal flutings 122, to facilitate the angle of adjustment screw 2 in operation.Limited bolt 13 is cylindric, as shown in Figure 9, has chamfering at the two ends of described limited bolt 13.
In the present embodiment, the breach on described universal snap ring 12 or gap 121 width are less than the width of described limited bolt 13.In other embodiments, the breach on described universal snap ring 12 or gap 121 width can equal the width of described limited bolt 13.Breach on described universal snap ring 12 or gap 121, the function of above-mentioned groove can be substituted, after the breach 121 of described universal snap ring 12 aims at described stopper slot 111, described limited bolt 13 snaps in the breach 121 of described stopper slot 111 and described universal snap ring 12, thus limits described universal snap ring 12 and rotate along described Universal screw nail hole 11.In this case, as shown in Figure 7, also longitudinal fluting 122 can not be set on universal snap ring 12 outer wall.
In the present embodiment, the external screw thread of the head of described screw 2 is that tapered thread matches with the female thread on the inwall of described universal snap ring 12.
Skeleton internal fixtion universal lock system of the present utility model is made up of the biocompatible material being selected from lower group: titanium, titanium alloy, rustless steel, novel absorbable material.
More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without the need to creative work.Therefore, all technical staff in the art according to design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should by the determined protection domain of claims.
Claims (9)
1. a skeleton internal fixtion universal lock system, it is characterized in that, described skeleton internal fixtion universal lock system comprises the steel plate and screw that cooperatively interact, described steel plate have Universal screw nail hole and universal snap ring, the inwall in described Universal screw nail hole is the sphere of indent, the outer wall of described universal snap ring is sphere, and described universal snap ring is embedded in described Universal screw nail hole
The inwall of described universal snap ring has female thread, and the head of described screw has external screw thread, and the external screw thread of described screw head and the female thread of described universal snap ring match.
2. skeleton internal fixtion universal lock system as claimed in claim 1, it is characterized in that, the outer wall of described universal snap ring is provided with microgroove.
3. skeleton internal fixtion universal lock system as claimed in claim 1, it is characterized in that, the female thread tapering on the inwall of described universal snap ring, described tapering size is α, 10 ° >=α >=6 °.
4. skeleton internal fixtion universal lock system as claimed in claim 1, it is characterized in that, described universal snap ring has breach or the gap of a longitudinal direction.
5. skeleton internal fixtion universal lock system as claimed in claim 1, is characterized in that described universal snap ring outer wall has at least one longitudinal fluting.
6. skeleton internal fixtion universal lock system as claimed in claim 5, it is characterized in that, described steel plate also comprises limited bolt, described Universal screw nail hole inwall is provided with stopper slot, after the groove of described universal snap ring aims at described stopper slot, inserted by described limited bolt in described stopper slot, described limited bolt snaps in the groove of described stopper slot and described universal snap ring, thus limits described universal snap ring and rotate along described Universal screw nail hole.
7. skeleton internal fixtion universal lock system as claimed in claim 1, it is characterized in that, described universal snap ring has a breach, described steel plate also comprises limited bolt, described Universal screw nail hole inwall is provided with stopper slot, when described universal snap ring notch alignment described in after stopper slot, described limited bolt is inserted in described stopper slot, described limited bolt snaps in the breach of described stopper slot and described universal snap ring, thus limits described universal snap ring and rotate along described Universal screw nail hole.
8. skeleton internal fixtion universal lock system as claimed in claim 7, it is characterized in that, limited bolt is cylindric, has chamfering at the two ends of described limited bolt.
9. skeleton internal fixtion universal lock system as claimed in claim 1, the external screw thread of the head of described screw is tapered thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520231908.3U CN204814131U (en) | 2015-04-16 | 2015-04-16 | Universal locking system of skeleton internal fixation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520231908.3U CN204814131U (en) | 2015-04-16 | 2015-04-16 | Universal locking system of skeleton internal fixation |
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| CN204814131U true CN204814131U (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520231908.3U Active CN204814131U (en) | 2015-04-16 | 2015-04-16 | Universal locking system of skeleton internal fixation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106308979A (en) * | 2016-08-31 | 2017-01-11 | 北京爱康宜诚医疗器材有限公司 | Acetabulum prosthesis |
| CN115844508A (en) * | 2023-02-22 | 2023-03-28 | 首都医科大学附属北京同仁医院 | Anatomical locking steel plate for minimally invasive treatment of humeral fracture |
-
2015
- 2015-04-16 CN CN201520231908.3U patent/CN204814131U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106308979A (en) * | 2016-08-31 | 2017-01-11 | 北京爱康宜诚医疗器材有限公司 | Acetabulum prosthesis |
| CN115844508A (en) * | 2023-02-22 | 2023-03-28 | 首都医科大学附属北京同仁医院 | Anatomical locking steel plate for minimally invasive treatment of humeral fracture |
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