CN213821671U - Spring micro-motion spinal connecting rod - Google Patents
Spring micro-motion spinal connecting rod Download PDFInfo
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- CN213821671U CN213821671U CN202022609116.9U CN202022609116U CN213821671U CN 213821671 U CN213821671 U CN 213821671U CN 202022609116 U CN202022609116 U CN 202022609116U CN 213821671 U CN213821671 U CN 213821671U
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- sphere
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Abstract
The utility model discloses a spring fine motion backbone connective bar, its structure includes: the first connecting rod, the second connecting rod and the spring; one end of the first connecting rod is connected with one end of the second connecting rod, one end of the joint is a sphere, the other end of the joint is provided with an inward concave structure, the inner surface of the inward concave structure is completely attached to the outer surface of the sphere and the inward concave structure contains more than 50% of the volume of the sphere, the ball body and the shaft part of the concave structure are both provided with inward depressions, the spring is arranged in a cavity formed by the two depressions, the spinal connecting rod has two connecting rods movably connected via embedded spherical surface, and the middle shaft part is connected via built-in spring, so that the two connecting rods can generate micro motion in certain range, the whole structure can deform only by the potential energy of the disc spring, and when the patient is doing rehabilitation training, not only can generate a certain supporting effect, but also can have a small amount of micromotion, thereby reducing the probability of degeneration of the intact vertebral body, and external body fluid is difficult to enter the joint through the gap, thereby improving the safety factor and the durability.
Description
Technical Field
The utility model belongs to the medical equipment field especially relates to a spinal column connective bar of innerspring.
Background
In the posterior spinal surgery, pedicle screws are basically matched with a connecting rod for fixation, the adjacent vertebral bodies of the pathological vertebral bodies are usually required to be fixed, the structure is rigid fixation, the intact vertebral bodies fixed into a whole have the risk of degeneration, the rigid fixation needs to be removed in order to keep the normal vertebral bodies unaffected, and a certain moving space is given to the normal vertebral bodies. The existing pedicle screw systems are rigid structures, and have no movable components or movable ranges, so that the fixation can cause the change of spinal force lines of adjacent segments, increase the motion amplitude of the adjacent segments and further cause the adjacent segments to degenerate.
Disclosure of Invention
For the above-mentioned problem of solving the existence of current backbone connective bar, the utility model discloses, designed a spring fine motion backbone connective bar, its structure includes: the first connecting rod, the second connecting rod and the spring; one end of the first connecting rod is connected with one end of the second connecting rod, one end of the joint of the first connecting rod and the second connecting rod is a sphere, the other end of the first connecting rod is provided with an inner surface which is completely attached to the outer surface of the sphere and comprises an inner concave structure with the volume of more than 50% of the sphere, the shaft parts of the sphere and the inner concave structure are both provided with inward depressions, and the spring is arranged in a cavity formed by the two depressions.
Preferably, when the concave structure is arranged on the first connecting rod/the second connecting rod, the end surface of the concave structure facing the second connecting rod/the first connecting rod is provided with a sealing ring with a pore diameter slightly smaller than that of the opening of the concave structure, so as to prevent external body fluid from entering the concave structure.
Preferably, the concave structure comprises 55% -80% of the ball body, and can be adjusted according to the requirement of a movable range.
Preferably, the concave structure and the ball body are made of the same material, so that a gap caused by different deformation generated by temperature change is prevented.
This backbone connective bar passes through embedded sphere swing joint with two connective bars, and the middle-axle part is through built-in spring connection, makes two sections connective bars can produce the fine motion in certain extent, and overall structure only belleville spring's potential energy just can produce and warp, and when the rehabilitation training was done to the disease, can produce certain supporting role, can have a small amount of fine motion again, reduces the probability that intact centrum produced the degeneration, and outside body fluid is difficult to get into the junction through the gap, has improved factor of safety and durability.
Drawings
Fig. 1 is a schematic view of a first viewing angle of the present invention.
In figure 1, a first connecting rod; 2. a second connecting rod; 3. a spring; 11. a concave structure; 12. a sealing ring 21, a sphere.
Detailed Description
Example 1
As shown in figure 1, the spring micro-motion spine connecting rod in the present case comprises: a first connecting rod 1, a second connecting rod 2 and a spring 3; the first connecting rod 1 is connected with one end of the second connecting rod 2, one end of the second connecting rod 2 is a sphere 21 at the joint, one end of the first connecting rod 1 is an inner concave structure 11, the inner surface of the inner concave structure is completely attached to the outer surface of the sphere 21 and the inner concave structure comprises more than 50% of the volume of the sphere 21, both shaft parts of the sphere 21 and the inner concave structure 11 are provided with inward depressions, and the spring 3 is arranged in a cavity formed by the two depressions and fixed at the bottoms of the depressions; the outer surface of the concave structure 11 is a spherical surface.
More specifically, inner concave structure 11 is provided with the sealing washer 12 that the aperture slightly is less than its opening aperture towards 2 terminal surfaces of second connective bar for prevent that outside body fluid from getting into, sealing washer 12 adopts soft implant materials such as silica gel system, and the export of inner concave structure 11 is hugged closely to its elasticity.
More specifically, the concave structure 11 contains 65% by volume of the spheres 21.
More specifically, the concave structure 11 and the ball 21 are made of the same metal material.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A spring micro-motion spinal connecting rod is characterized in that: the method comprises the following steps: the first connecting rod, the second connecting rod and the spring; one end of the first connecting rod is connected with one end of the second connecting rod, one end of the joint of the first connecting rod and the second connecting rod is a sphere, the other end of the first connecting rod is provided with an inner surface which is completely attached to the outer surface of the sphere and comprises an inner concave structure with the volume of more than 50% of the sphere, the shaft parts of the sphere and the inner concave structure are both provided with inward depressions, and the spring is arranged in a cavity formed by the two depressions.
2. The spring fretting spinal connector rod of claim 1, wherein: when the concave structure is arranged on the first connecting rod/the second connecting rod, the end face of the concave structure facing the second connecting rod/the first connecting rod is provided with a sealing ring with the aperture slightly smaller than the aperture of the opening of the concave structure.
3. The spring fretting spinal connection rod of claim 2, wherein: the concave structure comprises 55% -80% of the spheres.
4. The spring fretting spinal connection rod of claim 3, wherein: the concave structure and the ball body are made of the same material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022609116.9U CN213821671U (en) | 2020-11-12 | 2020-11-12 | Spring micro-motion spinal connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022609116.9U CN213821671U (en) | 2020-11-12 | 2020-11-12 | Spring micro-motion spinal connecting rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213821671U true CN213821671U (en) | 2021-07-30 |
Family
ID=77015653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022609116.9U Active CN213821671U (en) | 2020-11-12 | 2020-11-12 | Spring micro-motion spinal connecting rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213821671U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI805309B (en) * | 2022-04-07 | 2023-06-11 | 碩果生醫科技有限公司 | Spine connecting rod |
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2020
- 2020-11-12 CN CN202022609116.9U patent/CN213821671U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI805309B (en) * | 2022-04-07 | 2023-06-11 | 碩果生醫科技有限公司 | Spine connecting rod |
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