CN207979765U - It is fixed in the bone that can be extended automatically - Google Patents
It is fixed in the bone that can be extended automatically Download PDFInfo
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- CN207979765U CN207979765U CN201721620415.4U CN201721620415U CN207979765U CN 207979765 U CN207979765 U CN 207979765U CN 201721620415 U CN201721620415 U CN 201721620415U CN 207979765 U CN207979765 U CN 207979765U
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- rivet nut
- bone
- oblique tooth
- fixed
- hollow structure
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Abstract
The utility model patent is related to medical instruments field, it discloses fixed in a kind of bone that can be extended automatically, including the first rivet nut and the second rivet nut, several mounting holes are offered in first rivet nut and the second rivet nut, it is threaded with screw on the mounting hole, the diameter of first rivet nut is more than the diameter of the second rivet nut, the described one end of first rivet nut far from mounting hole is hollow structure, second rivet nut is inserted into the hollow structure of the first rivet nut, the several first oblique teeth are fixedly connected in the hollow structure of first rivet nut, first one end of oblique tooth far from the first rivet nut is towards the opening direction of hollow structure, several the second oblique teeth being slidably connected with the first oblique tooth are hinged in second rivet nut, the side of the second oblique tooth far from the first oblique tooth and it is connected with elastic component between the second rivet nut；This patent compared with prior art, can realize that intramedullary nail extends automatically with the growth of bone, to not interfere with the bone growth of patient.
Description
Technical field
The utility model is related to fixed in medical instruments field more particularly to a kind of bone that can be extended automatically.
Background technology
People is after fracturing, and in order to make the bone of fracture restore as early as possible, doctor generally can first answer the bone of fracture
Position is again fixed bone after resetting；The bone of fracture, which is fixed generally, outer fixation and interior fixed two methods,
Common external fixation has plintlet, plaster bandage, abduction splint, continuous traction and external fixator of threading a needle etc., inner fixed law master
After being used for open reduction, using metal inside-fixture, such as bone plate, screw, intramedullary nail, intramedullary nail with lock and compression steel plate
Deng fracture segment being fixed in the position of anatomical reduction, the most common tool of interior fixation of fracture is exactly intramedullary nail.
Intramedullary nail is the common inner fixing device of the fracture such as humerus, femur, shin bone, and common intramedullary nail structure includes in marrow
Nail rod and fixing screws are respectively equipped with the through-hole passed through for fixing screws on the proximal end of medullary nailing rod, distal end.In use, first
First medullary nailing rod is inserted into ossis, then passes through bone wall and medullary nailing rod with fixing screws in the both sides up and down of fracture again
It is fixed.
Intramedullary nail fixed, flexible fastening because of centered on to the fixation of bone, stress is more dispersed, and stress shielding is avoided to make
With the probability that second fracture occurs is relatively low, therefore is more and more being used in fracture fixation, but current intramedullary nail is deposited
In following problem：If after child's fracture, the bone of fracture is fixed using intramedullary nail, because current intramedullary nail
Length is changeless, and the bone of child is in growth conditions, if by Intramedullary nailing in bone, intramedullary nail
It cannot together be grown with the bone of child, to which the skeleton development growth of child can be influenced.
Utility model content
In view of this, the purpose of this utility model be to provide it is a kind of the child of fracture is carried out it is fixed in bone, can be with
Automatically fixed in the bone extended, it can overcome to be fixed from existing bone and grown together with the bone of child, to
The problem of influencing the skeleton development growth of child.
The utility model solves above-mentioned technical problem by following technological means：It is fixed in the bone that can be extended automatically,
Including the first rivet nut and the second rivet nut, several mounting holes are offered in the first rivet nut and the second rivet nut, spiral shell on the mounting hole
Line is connected with screw, and the diameter of first rivet nut is more than the diameter of the second rivet nut, first rivet nut far from mounting hole one
End is hollow structure, and the second rivet nut is inserted into the hollow structure of the first rivet nut, is fixedly connected in the hollow structure of the first rivet nut
Several first oblique teeth, first one end of oblique tooth far from the first rivet nut is towards the opening direction of hollow structure, the second rivet nut
On be hinged with several the second oblique teeth being slidably connected with the first oblique tooth, the second oblique tooth far from the first oblique tooth one
It is connected with elastic component between side and the second rivet nut.
What is reached has the technical effect that, after this intramedullary nail is implanted into marrow, screw is passed through big bone, is screwed to mounting hole
Interior, reset condition is that the second oblique tooth is stuck on the first oblique tooth, is supported to bone by the first rivet nut and the second rivet nut
And fixation, during bone growth, bone is progressively longer, and during bone growth is elongated, bone both ends will be respectively
The first rivet nut and the second rivet nut are pulled, during pulling the first rivet nut and the second rivet nut, the second oblique tooth compression elastic piece,
First oblique tooth loses to the second oblique tooth support, the first oblique tooth and the second oblique tooth is opposite slides, until the first rivet nut and
Second rivet nut is blocked the second oblique tooth by the next first oblique tooth, and in sliding process, the second rivet nut is gradually from first
It is skidded off in the hollow structure of rivet nut, the length of entire rivet nut, realizes that intramedullary nail extends automatically with the growth of bone, from
And avoid growing together with the bone of child because being fixed from existing bone, to which the skeleton development of child can be influenced
The problem of growth.
Further, the described first oblique tooth is provided with several first corrugated teeths close to the side of the second oblique tooth, and described
Two oblique teeth are provided with several second corrugated teeths close to the side of the first oblique tooth, and first corrugated teeth and the second corrugated teeth are slided
Dynamic connection.By the setting of the first corrugated teeth and the second corrugated teeth, when bone has subtle length variation, the second rivet nut is just
As soon as the distance of a corrugated teeth can be extended out of the first rivet nut hollow structure, in this way, the variable elongation smaller of intramedullary nail, less
It can influence the growth of bone.
Further, be provided with guide ring on the inner wall of the first rivet nut hollow structure, the second rivet nut pass through guide ring with
And guide ring is slidably connected.The setting of guide ring can make the second rivet nut keep same with the first rivet nut always in sliding process
One straight line will not shift, and be more advantageous to the fixation to bone.
Further, it is provided with sliding bearing between the guide ring and the second rivet nut.The setting of sliding bearing makes second
The sliding of rivet nut is steady, reliable, and the second rivet nut can greatly reduce guide ring and the second nail during being slided on guide ring
Friction between body skids off conducive to the second rivet nut out of the first rivet nut hollow structure.
Further, first rivet nut is connected with the second rivet nut surface blending.First shaft diameter is more than the second rivet nut, and
Its interconnecting piece is tapered, and surface blending meets skeletal shape, and bones are placed into conducive to by intramedullary nail.
Further, the described one end of second rivet nut far from the first rivet nut is spherical surface.It is placed in marrow by this intramedullary nail
When, the end of the second rivet nut, which is spherical surface, can play the role of guiding.
Further, the material of first rivet nut and the second rivet nut is titanium alloy.Titanium alloy is because of the high, corrosion resistance with intensity
Well, the advantages that heat resistance is high, service life is long.
Further, the elastic component is spring.Spring mutability, elasticity is big, in sliding process, is conducive to the second oblique tooth
It is moved to the direction close to the second rivet nut.
The beneficial effects of the utility model：
It 1,, can be with by the sliding of the first corrugated teeth and the second corrugated teeth after the utility model is fixed in bone
The subtle growth of bone and extend automatically, do not interfere with the bone growth of patient.
2, the utility model is made by titanium alloy material, has many advantages, such as that intensity is high, corrosion resistance is good, heat resistance is high, uses
Long lifespan.
3, second rivet nut of the utility model is spherical surface far from one end of the first rivet nut, and the first rivet nut and the second rivet nut are bent
Face transition meets skeletal shape, and spherical surface can play guiding role, and bones are placed into conducive to by intramedullary nail.
4, for this programme in elongation process, the first rivet nut and the second rivet nut remain same straight line, will not occur partially
It moves, is conducive to the fixation to bone.
Description of the drawings
The structural schematic diagram of embodiment is fixed in the bone that Fig. 1 can extend automatically for the utility model.
Fig. 2 is the schematic diagram in the hollow structure of the first rivet nut in Fig. 1.
Fig. 3 is the partial enlarged view at A in Fig. 2.
Wherein：First rivet nut 1, the second rivet nut 2, mounting hole 3, screw 4, the first oblique tooth 5, the second oblique tooth 6, spring 7,
First corrugated teeth 8, the second corrugated teeth 9, guide ring 10, sliding bearing 11, fixed block 12, elastic seal ring 13.
Specific implementation mode
The utility model is described in detail below with reference to attached drawing：
As shown in Figs. 1-3：It is fixed in the bone that can be extended automatically, including the first rivet nut 1 and the second rivet nut 2, the first nail
Mounting hole 3 is offered in body 1 and the second rivet nut 2, screw 4 is threaded on the mounting hole 3, first rivet nut 1
Diameter is more than the diameter of the second rivet nut 2, and the upper end of first rivet nut 1 is hollow structure, and the second rivet nut 2 is inserted into the first rivet nut 1
Hollow structure in, be fixedly connected in the hollow structure of the first rivet nut 1 there are six the first oblique tooth 5, the first oblique tooth 5 is far from the
One end of one rivet nut 1 is towards the opening direction of hollow structure, and hinged in the second rivet nut 2 there are six slided with the first oblique tooth 5
Second oblique tooth 6 of connection, elastic component is connected between the downside and the second rivet nut 2 of the second oblique tooth 6.
The first oblique tooth 5 is provided with several first corrugated teeths 8 close to the side of the second oblique tooth 6, and described second tiltedly
The side of first oblique tooth 5 is provided with several second corrugated teeths 9, first corrugated teeth, 8 and second corrugated teeth 9 to tooth 6
It is slidably connected.Pass through the setting of the first corrugated teeth 8 and the second corrugated teeth 9, when bone has subtle length variation, the second nail
As soon as body 2 can extend the distance of a corrugated teeth out of the first rivet nut 1 hollow structure, in this way, the variable elongation of intramedullary nail is more
It is small, the growth of bone is not interfered with more.
Guide ring 10 is provided on the inner wall of first rivet nut, 1 hollow structure, the second rivet nut 2 is across guide ring 10 and simultaneously
Guide ring 10 is slidably connected.The setting of guide ring 10 can make the second rivet nut 2 be protected always with the first rivet nut 1 in sliding process
Same straight line is held, will not be shifted, the fixation to bone is more advantageous to.
It is provided with sliding bearing 11 between the guide ring 10 and the second rivet nut 2.The setting of sliding bearing 11 makes second
The sliding of rivet nut 2 is steady, reliable, the second rivet nut 2 during being slided on guide ring 10, can greatly reduce guide ring 10 with
Friction between second rivet nut 2 skids off conducive to the second rivet nut 2 out of the first rivet nut 1 hollow structure.
First rivet nut 1 is connected with 2 surface blending of the second rivet nut.First rivet nut, 1 diameter is more than the second rivet nut 2, and its
Interconnecting piece is tapered, and surface blending meets skeletal shape, and bones are placed into conducive to by intramedullary nail.
The one end of second rivet nut 2 far from the first rivet nut 1 is spherical surface.When this intramedullary nail is placed in marrow, the
The end of two rivet nuts 2, which is spherical surface, can play the role of guiding.
The material of first rivet nut, 1 and second rivet nut 2 is titanium alloy.Titanium alloy is because high with intensity, corrosion resistance is good, resistance to
The advantages that hot high, service life is long.
The elastic component is spring 7.7 mutability of spring, elasticity is big, in sliding process, be conducive to the second oblique tooth 6 to by
The direction of nearly second rivet nut 2 moves.
The hollow structure bottom of first rivet nut 1 is provided with fixed block 12, and blind hole, the second nail are provided on fixed block 12
The lower end of body is slidably connected in blind hole.In this way, the lower end of the second rivet nut in the blind hole of fixed block, avoids shifting.
It is provided with elastic seal ring 13 in the hollow structure of first rivet nut.In this way, the second rivet nut 2 can be with the first nail
It is sealed at the hollow structure of body 1 tight.
The application method of the utility model is as follows：
The second rivet nut 2 is pulled first, the utility model is stretched to required length, the second oblique tooth 6 is stuck in first tiltedly
To on tooth 5；Spherical surface one end of second rivet nut 2 is inserted into marrow, then screw 4 is utilized to pass through big bone, is screwed to mounting hole 3
It is interior, bone is supported and is fixed by the first rivet nut 1 and the second rivet nut 2.
During bone growth, bone is progressively longer, and during bone growth is elongated, bone both ends will be respectively
The first rivet nut 1 and the second rivet nut 2 are pulled, during pulling the first rivet nut 1 and the second rivet nut 2, the second oblique tooth 6 compresses bullet
Spring 7 is moved to the direction close to the second rivet nut 2, and the first corrugated teeth 8 loses the support to the second corrugated teeth 9,5 He of the first oblique tooth
The opposite sliding of second oblique tooth 6, until the first rivet nut 1 and the second rivet nut 2 by next first corrugated teeth 8 by the second corrugated teeth
9 block, and in sliding process, the second rivet nut 2 is gradually skidded off out of the first rivet nut 1 hollow structure, the length of entire intramedullary nail
It is elongated, realize intramedullary nail extended automatically with the growth of bone, to avoid because existing bone in be fixed from
The problem of bone of child is grown together, and the skeleton development to influence child is grown.
Above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although with reference to preferred embodiment pair
The utility model is described in detail, it will be understood by those of ordinary skill in the art that, it can be to the technology of the utility model
Scheme is modified or replaced equivalently, and without departing from the objective and range of technical solutions of the utility model, should all be covered
In the right of the utility model.Technology that the utility model is not described in detail, shape, construction part are known
Technology.
Claims (8)
1. being fixed in the bone that can be extended automatically, including the first rivet nut and the second rivet nut, in the first rivet nut and the second rivet nut
Several mounting holes are offered, screw is threaded on the mounting hole, it is characterised in that：The diameter of first rivet nut is more than
The diameter of second rivet nut, the described one end of first rivet nut far from mounting hole are hollow structure, and the second rivet nut is inserted into the first rivet nut
In hollow structure, the several first oblique teeth are fixedly connected in the hollow structure of the first rivet nut, the first oblique tooth is far from the first nail
One end of body is hinged with several the to be slidably connected with the first oblique tooth towards the opening direction of hollow structure in the second rivet nut
Two oblique teeth, the side of the second oblique tooth far from the first oblique tooth and are connected with elastic component between the second rivet nut.
2. fixed in the bone according to claim 1 that can be extended automatically, it is characterised in that：The first oblique tooth leans on
The side of nearly second oblique tooth is provided with several first corrugated teeths, and the second oblique tooth is arranged close to the side of the first oblique tooth
There are several second corrugated teeths, first corrugated teeth and the second corrugated teeth to be slidably connected.
3. fixed in the bone according to claim 2 that can be extended automatically, it is characterised in that：First rivet nut is hollow
Guide ring is provided on the inner wall of structure, the second rivet nut passes through guide ring and is slidably connected with guide ring.
4. fixed in the bone according to claim 3 that can be extended automatically, it is characterised in that：The guide ring and second
Sliding bearing is provided between rivet nut.
5. fixed in the bone according to claim 4 that can be extended automatically, it is characterised in that：First rivet nut and
Two rivet nut surface blendings connect.
6. fixed in the bone that can be extended automatically according to claim 1-5 any one of them, it is characterised in that：Described second
The one end of rivet nut far from the first rivet nut is spherical surface.
7. fixed in the bone that can be extended automatically according to claim 1-5 any one of them, it is characterised in that：Described first
The material of rivet nut and the second rivet nut is titanium alloy.
8. fixed in the bone according to claim 7 that can be extended automatically, it is characterised in that：The elastic component is bullet
Spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721620415.4U CN207979765U (en) | 2017-11-29 | 2017-11-29 | It is fixed in the bone that can be extended automatically |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721620415.4U CN207979765U (en) | 2017-11-29 | 2017-11-29 | It is fixed in the bone that can be extended automatically |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207979765U true CN207979765U (en) | 2018-10-19 |
Family
ID=63804826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721620415.4U Expired - Fee Related CN207979765U (en) | 2017-11-29 | 2017-11-29 | It is fixed in the bone that can be extended automatically |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207979765U (en) |
-
2017
- 2017-11-29 CN CN201721620415.4U patent/CN207979765U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20181019 Termination date: 20191129 |