Fast holding device for fusion cage

Abstract

The utility model discloses a fast holding device for a fusion cage. The fast holding device comprises a push rod outer rod, a push rod inner rod, a clamping assembly and a control assembly. A through hole is formed in the push rod outer rod in the axial direction. The push rod inner rod is arranged in the through hole in a sliding manner; the clamping assembly is arranged at one end of the push rod inner rod and comprises a clamping jaw, the clamping jaw comprises two clamping sections, and the two clamping sections are arranged in a V shape, can be close to or away from each other and are used for clamping or releasing a fusion cage; the control assembly is arranged on the push rod inner rod and the push rod outer rod and used for controlling the two clamping sections to be close to or away from each other. Wherein the clamping assembly has a locking state and an unlocking state; in the locking state, the two clamping sections are close to each other and clamp the fusion cage; and in the unlocking state, the two clamping sections are far away from each other and are not in contact with the fusion cage. According to the rapid holding device for the fusion cage, rapid clamping or releasing of the fusion cage can be achieved, and the operation efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and particularly relates to a fusion device quick holding device. Background Art

[0002] Interbody fusion connects two or more vertebrae to provide greater stability, thereby correcting problems or alleviating pain. Interbody fusion, through the implantation of a fusion cage, can effectively address cervical and lumbar intervertebral disc stenosis, degenerative diseases, and other conditions. The design concept involves implanting a fixed intervertebral fusion cage in the existing intervertebral space. The cage provides support, restores intervertebral height, widens the intervertebral foramen, and relieves nerve compression symptoms.

[0003] Currently, most spinal intervertebral fusion devices and push rods on the market use circumferential positioning and axial thread locking. This connection method requires the creation of threads on the spinal intervertebral fusion device that match the push rod's size, allowing the two to be threaded together. This requires manual tightening when removing the spinal intervertebral fusion device, making it inefficient. Furthermore, the axial thread locking method can result in unlocking failures.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0005] The purpose of the utility model is to provide a fusion device quick holding device, which can realize the quick clamping or release of the fusion device and improve the operation efficiency.

[0006] In order to achieve the above-mentioned purpose, a specific embodiment of the present invention provides a fusion device quick holding device, which includes: a push rod outer rod, a push rod inner rod, a clamping assembly and a control assembly. The push rod outer rod is provided with a through hole along its axial direction; the push rod inner rod is slidably arranged in the through hole; the clamping assembly is arranged at one end of the push rod inner rod, including a clamping claw, the clamping claw includes two clamping segments, the two clamping segments are arranged in a V shape and can move closer to or farther away from each other, for clamping or releasing the fusion device; the control assembly is arranged on the push rod inner rod and the push rod outer rod, for controlling the approach or distance of the two clamping segments; wherein, the clamping assembly has a locked state and an unlocked state; in the locked state, the two clamping segments move closer to each other and clamp the fusion device; in the unlocked state, the two clamping segments move farther away from each other and lose contact with the fusion device.

[0007] In one or more embodiments of the present invention, the control assembly includes: a locking groove, an unlocking member, an unlocking button, and an elastic member. The locking groove is provided on the push rod inner rod; the unlocking member is pivotally connected to the push rod outer rod and operatively connected to the locking groove; the unlocking button is provided on the push rod outer rod and located above the unlocking member, and the unlocking button can be pressed to drive the unlocking member to pivot; the elastic member is sleeved on the push rod inner rod, one end of the elastic member abuts against the inner wall of the push rod outer rod and the other end abuts against the push rod inner rod, and has an elastic force that causes the push rod inner rod to extend out of the through hole.

[0008] In one or more embodiments of the present invention, a protrusion extending radially along the inner rod of the push rod is formed on the side of the unlocking member close to the inner rod of the push rod; when the protrusion is against the locking groove, the clamping claws approach; when the protrusion is out of contact with the locking groove, the clamping claws move away.

[0009] In one or more embodiments of the present invention, a receiving hole is provided on the outer rod of the push rod along its radial direction, the unlocking member is rotatably connected to the inner wall of the receiving hole, and the unlocking button can move in the receiving hole to drive the unlocking member to rotate.

[0010] In one or more embodiments of the present invention, the inner wall of the push rod outer rod is provided with a stepped support portion, and the end of the push rod inner rod is provided with an annular support portion, one end of the elastic member is abutted against the stepped support portion, and the other end thereof is abutted against the annular support portion.

[0011] In one or more embodiments of the present invention, the clamping assembly further comprises two springs, each of which is arranged between the inner rod of the push rod and the corresponding clamping segment. In the locked state, the springs are compressed and provide an elastic force that moves the two clamping segments away from each other.

[0012] In one or more embodiments of the present invention, a mounting groove is provided at one end of the inner rod of the push rod, and one end of the two clamping sections is coaxially arranged in the mounting groove; a mounting inclined surface is provided in the mounting groove, and the spring is arranged on the mounting inclined surface and is against the inner wall of the clamping section.

[0013] In one or more embodiments of the present invention, the through hole forms an enlarged portion near one end of the clamping assembly; in the locked state, the clamping claw is partially accommodated in the enlarged portion, and the two clamping sections are close to each other and abut against the inner wall of the enlarged portion; in the unlocked state, the clamping claw extends from the inner part of the enlarged portion, and the two clamping sections are far away from each other.

[0014] In one or more embodiments of the present invention, the clamping assembly further includes a connecting portion arranged at one end of the push rod inner rod, the connecting portion extending axially along the push rod inner rod, a connecting hole being provided on one side of the fusion device, and the connecting portion being configured to be inserted into the connecting hole.

[0015] In one or more embodiments of the present invention, a protrusion is provided on one side of the clamping section close to the inner rod of the push rod, a fixing groove is provided on the fusion device, and the protrusion is configured to be able to be seated in the fixing groove.

[0016] Compared to existing technologies, the present invention's rapid fusion device grips the device by opening and closing its gripping claws, making gripping and releasing the device faster and more convenient. The device used with this device requires no screw holes, reducing manufacturing costs. The control assembly eliminates the issue of the device being unable to be unscrewed compared to existing grippers, making the rapid fusion device even easier to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some of the embodiments described in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts.

[0018] Figure 1 This is a three-dimensional diagram of a fusion cage quick-holding device in one embodiment of the present invention;

[0019] Figure 2 This is a front view of a fusion cage quick-holding device in one embodiment of the present invention;

[0020] Figure 3 for Figure 2 Cross-sectional view along the AA axis when the rapid holding device of the fusion cage is locked;

[0021] Figure 4 for Figure 2 Cross-sectional view along the AA axis when the quick-holding device of the fusion cage is unlocked;

[0022] Figure 5 for Figure 3 Enlarged view of area A in the middle;

[0023] Figure 6 for Figure 4 Enlargement of area B in the middle;

[0024] Figure 7This is a top view of a fusion cage quick-holding device in one embodiment of the present invention;

[0025] Figure 8 for Figure 7 Cross-sectional view along the BB axis when the quick-holding device of the fusion cage is locked;

[0026] Figure 9 for Figure 7 Cross-sectional view along the BB axis when the quick-holding device of the fusion cage is unlocked;

[0027] Figure 10 for Figure 8 Enlarged view of area C in the middle;

[0028] Figure 11 for Figure 9 Enlarged view of area D in the middle;

[0029] Figure 12 This is an exploded view of a fusion cage quick-holding device in one embodiment of the present invention.

[0030] Description of main reference numerals:

[0031] 1-push rod outer rod, 11-through hole, 12-enlarged portion, 13-accommodating hole, 14-step-shaped support portion, 2-push rod inner rod, 21-mounting groove, 211-mounting slope, 22-annular support portion, 3-clamping assembly, 31-clamping claw, 311-clamping section, 3111-protrusion, 32-connecting portion, 33-reed, 4-control assembly, 41-locking groove, 42-unlocking member, 421-protrusion, 43-elastic member, 44-unlocking button, 5-fusion device, 51-connecting hole, 52-fixing groove, a-pivot. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only a portion of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present invention.

[0033] like Figure 1-12As shown, a fusion device quick holding device in one embodiment of the present invention includes a push rod outer rod 1, a push rod inner rod 2, a clamping assembly 3 and a control assembly 4. The push rod outer rod 1 is provided with a through hole 11 along its axial direction. The push rod inner rod 2 is slidably arranged in the through hole 11. The clamping assembly 3 is arranged at one end of the push rod inner rod 2, and includes a clamping claw 31. The clamping claw 31 includes two clamping segments 311. The two clamping segments 311 are arranged in a V shape and can move closer to or farther away from each other, and are used to clamp or release the fusion device 5. The control assembly 4 is arranged on the push rod inner rod 2 and the push rod outer rod 1, and is used to control the approach or distance of the two clamping segments 311. The clamping assembly 3 has a locked state and an unlocked state. In the locked state, the two clamping segments 311 move closer to each other and clamp the fusion device 5; in the unlocked state, the two clamping segments 311 move away from each other and are out of contact with the fusion device 5.

[0034] The operating principle of this device for rapid fusion device removal is as follows: Before use, the fusion device 5 is clamped by the clamping claws 31 of the clamping assembly 3. When the two clamping segments 311 clamp the fusion device 5, the fusion device 5 is fixed to the push rod inner rod 2, allowing the fusion device 5 to be inserted into the desired installation location through the push rod inner rod 2. Once the fusion device 5 is installed in the designated position, the control assembly 4 moves the two clamping segments 311 away from each other and out of contact with the fusion device 5, allowing the fusion device 5 to be detached from the push rod inner rod 2.

[0035] In the above embodiment, the fusion device quick holding device of the present invention holds the fusion device 5 by controlling the opening and closing of the clamping claws 31. Compared with the threaded connection of the prior art, the clamping claws 31 are faster and more convenient in holding and removing the fusion device 5.

[0036] In one embodiment, the clamping assembly 3 further includes two reeds 33. Each reed 33 is disposed between the push rod inner rod 2 and the corresponding clamping section 311. Figure 3 and Figure 5 As shown, in the locked state, the two clamping sections 311 are close to each other, and the spring 33 is in a compressed state, with an elastic force that makes the two clamping sections 311 move away from each other. Figure 4 and Figure 6 As shown, in the unlocked state, the elastic force of the spring 33 is released, the two clamping sections 311 are stretched apart by the spring 33 and move away from each other, breaking contact with the fusion device 5, and the fusion device 5 can be detached from the push rod inner rod 2.

[0037] In one embodiment, if Figure 8 and Figure 12As shown, the control assembly 4 includes a locking slot 41, an unlocking member 42, a resilient member 43 mounted on the push rod inner rod 2, and an unlocking button 44. The locking slot 41 is defined within the push rod inner rod 2; the unlocking member 42 is pivotally connected to the push rod outer rod 1 via a pivot axis a and is operatively connected to the locking slot 41, restricting axial movement of the push rod inner rod 2 along the push rod outer rod 1. The unlocking button 44 is located on the push rod outer rod 1 above the unlocking member 42 and can be pressed to pivot the unlocking member 42.

[0038] Specifically, the unlocking member 42 and the locking groove 41 may be arranged in such a manner that a protrusion 421 is formed on the unlocking member 42 on a side close to the push rod inner rod 2 and extending radially along the push rod inner rod 2. The operative connection between the unlocking member 42 and the locking groove 41 means that the unlocking member 42 is located in the locking groove 41 only when in the locked state.

[0039] like Figure 10 As shown, when the protrusion 421 is pressed against the locking groove 41, the two clamping sections 311 are close to each other, and the elastic member 43 on the inner rod 2 of the push rod is compressed. Figure 11 As shown, when the protrusion 421 is out of contact with the locking groove 41, the elastic force of the elastic member 43 on the push rod inner rod 2 is released, and the push rod inner rod 2 partially extends from the push rod outer rod 1 along the through hole 11. The spring 33 on the push rod inner rod 2 opens the clamping claw 31, and the two clamping sections 311 move away from each other to make it out of contact with the fusion device 5.

[0040] Further, such as Figure 12 As shown, the push rod outer rod 1 is provided with a receiving hole 13 along its radial direction. The unlocking member 42 is rotatably connected to the inner wall of the receiving hole 13, and the unlocking button 44 is movable within the receiving hole 13, driving the unlocking member 42 to rotate, thereby allowing the protrusion 421 of the unlocking member 42 to disengage from the locking groove 41. For example, the abutment between the unlocking button 44 and the unlocking member 42 and the protrusion 421 of the unlocking member 42 are respectively located at opposite ends of the pivot a where the unlocking member 42 connects to the receiving hole 13, forming a lever structure. When the unlocking button 44 is pressed, the unlocking button 44 depresses one end of the unlocking member 42, allowing the unlocking member 42 to rotate about the pivot, thereby allowing the protrusion 421 to disengage from the locking groove 41. Furthermore, a spring may be provided between the unlocking button 44 and the unlocking member 42 to reset the unlocking button 44.

[0041] In one embodiment, an elastic member 43 mounted on the push rod inner rod 2 has one end abutting the inner wall of the push rod outer rod 1 and the other end abutting the push rod inner rod 2, exerting an elastic force that forces the push rod inner rod 2 to extend out of the through hole 11. Specifically, the elastic member 43 may be configured such that the inner wall of the push rod outer rod 1 is provided with a stepped support portion 14, and the end of the push rod inner rod 2 is provided with an annular support portion 22. With one end of the elastic member 43 abutting the stepped support portion and the other end abutting the annular support portion 22, the elastic force of the elastic member 43 can be compressed and released axially along the push rod inner rod 2.

[0042] The clamping assembly 3 clamps the fusion device 5 under the control of the control assembly 4. Figure 5 and Figure 12 As shown, the through hole 11 forms an enlarged portion 12 at one end near the clamping assembly 3. In the locked state, the clamping claw 31 is partially accommodated within the enlarged portion 12, with the two clamping segments 311 positioned adjacent to each other and abutting against the inner wall of the enlarged portion 12. The inner wall of the enlarged portion 12 abuts the clamping claw 31, preventing the elastic force of the spring 33 from being released, thereby maintaining the clamping claw 31 in the locked state.

[0043] like Figure 6 As shown, in the unlocked state, the clamping claw 31 extends from the inner part of the enlarged portion 12, and the elastic force of the reed 33 is released, so that the two clamping segments 311 are relatively separated from the fusion device 5, thereby achieving unlocking between the clamping claw 31 and the fusion device 5.

[0044] Specifically, such as Figure 5 、 Figure 6 and Figure 12 As shown, the clamping claw 31 can be specifically configured as follows: a mounting slot 21 is defined at one end of the push rod inner rod 2, and one end of two clamping segments 311 is coaxially mounted within the mounting slot 21. For example, one end of the two clamping segments 311 can overlap and be pivotally connected to the inner wall of the mounting slot 21 via a rotating shaft. Alternatively, the clamping claw segment 311 can be an arcuate clamping segment 311. The mounting slot 21 has an inclined mounting surface 211, and the spring 33 is disposed on the inclined mounting surface 211 and abuts against the inner wall of the clamping segment 311 to engage with the arcuate clamping segment 311.

[0045] In addition, a protrusion 3111 can be provided on the side of the clamping section 311 close to the push rod inner rod 2. A fixing groove 52 is provided on the fusion device 5. The protrusion 3111 is constructed to be able to be positioned in the fixing groove 52 to improve the clamping ability of the clamping claw 31 on the fusion device 5 and prevent the fusion device 5 from falling off from the push rod inner rod 2.

[0046] The clamping assembly 3 also includes a connecting portion 32 disposed at one end of the push rod inner rod 2. The connecting portion 32 extends axially along the push rod inner rod 2, and a connecting hole 51 is provided on one side of the fusion device 5. The connecting portion 32 is configured to be inserted into the connecting hole 51. The arrangement of the connecting portion 32 and the connecting hole 51 can cooperate with the clamping claw 31. During the clamping process of the clamping claw 31, the connecting portion 32 inserted into the connecting hole 51 can further secure the fusion device 5.

[0047] The working method of the fusion device quick holding device is as follows: before use, the connecting portion 32 on the push rod inner rod 2 is inserted into the connecting hole 51 of the fusion device 5. The elastic member 43 between the push rod inner rod 2 and the push rod outer rod 1 is compressed, and the protrusion 421 of the unlocking member 42 is pressed against the locking groove 41, so that the push rod inner rod 2 cannot slide in the push rod outer rod 1, and the elastic force of the elastic member 43 cannot be released. At the same time, the two clamping sections 311 are partially accommodated in the expansion portion 12 and the spring 33 arranged between the clamping claw 31 and the push rod inner rod 2 is compressed, and the entire fusion device 5 quick holding device is in a locked state. During use, the operator presses the unlocking button 44, and the unlocking button 44 moves downward along the accommodating hole 13 while driving the unlocking member 42 to rotate, and the protrusion 421 of the unlocking member 42 disengages from the locking groove 41. The elastic force of the elastic member 43 within the push rod inner rod 2 and the push rod outer rod 1 is released, causing the push rod inner rod 2 to extend outward. The clamping section 311 extends from the inner portion of the expanded portion 12 and engages the inner wall of the expanded portion 12. The elastic force of the spring 33 is released, driving the clamping section 311 away. The fusion device 5 and the clamping claw 31 are no longer in contact, and the fusion device 5 can be detached from the push rod inner rod 2.

[0048] In summary, the present invention's rapid fusion device removal device clamps the fusion device 5 by opening and closing the clamping claws 31, making it quicker and more convenient to hold and remove the fusion device 5. The fusion device 5 used with this device does not require screw holes, reducing manufacturing costs. Compared to existing clamps, the configuration of the control assembly 4 avoids the problem of the fusion device 5 being unable to be removed, making the rapid fusion device 5 removal device even easier to operate.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0050] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A fusion cage quick holding device, characterized in that: include: The push rod outer rod has a through hole opened along its axial direction; an inner push rod, slidably disposed in the through hole; A clamping assembly is provided at one end of the inner rod of the push rod, comprising a clamping claw, wherein the clamping claw comprises two clamping segments, the two clamping segments being arranged in a V-shape and capable of moving closer to or farther from each other, for clamping or releasing the fusion device; and A control assembly, provided on the push rod inner rod and the push rod outer rod, for controlling the approach or separation of the two clamping sections; The clamping assembly has a locked state and an unlocked state; in the locked state, the two clamping segments are close to each other and clamp the fusion device; in the unlocked state, the two clamping segments are away from each other and out of contact with the fusion device.

2. The fusion cage quick holding device according to claim 1, characterized in that: The control component includes: A locking groove is provided on the inner rod of the push rod; an unlocking member pivotally connected to the push rod outer rod and operatively connected to the locking slot; an unlocking button, provided on the outer rod of the push rod and located above the unlocking member, the unlocking button being capable of being pressed to drive the unlocking member to pivot; and The elastic member is sleeved on the push rod inner rod, one end of which is against the inner wall of the push rod outer rod and the other end is against the push rod inner rod, and has elastic force to make the push rod inner rod extend out of the through hole.

3. The fusion cage quick holding device according to claim 2, characterized in that: A protrusion extending radially along the inner rod of the push rod is formed on the unlocking member on one side close to the inner rod of the push rod; when the protrusion is disposed in the locking groove, the clamping claws approach; when the protrusion is out of contact with the locking groove, the clamping claws move away.

4. The fusion cage quick holding device according to claim 2, characterized in that: An accommodating hole is provided on the outer rod of the push rod along its radial direction. The unlocking member is rotatably connected to the inner wall of the accommodating hole. The unlocking button can move in the accommodating hole to drive the unlocking member to rotate.

5. The fusion cage quick holding device according to claim 2, characterized in that: The inner wall of the push rod outer rod is provided with a stepped support portion, the end of the push rod inner rod is provided with an annular support portion, one end of the elastic member is abutted against the stepped support portion, and the other end thereof is in contact with the annular support portion.

6. The fusion cage quick holding device according to claim 1, characterized in that: The clamping assembly further comprises two springs, each of which is arranged between the inner rod of the push rod and the corresponding clamping segment. In the locked state, the springs are compressed and provide elastic force to move the two clamping segments away from each other.

7. The fusion cage quick holding device according to claim 6, characterized in that: One end of the inner rod of the push rod is provided with a mounting groove, and one end of the two clamping sections is coaxially arranged in the mounting groove; a mounting inclined surface is provided in the mounting groove, and the spring is arranged on the mounting inclined surface and abuts against the inner wall of the clamping section.

8. The fusion cage quick holding device according to claim 1, characterized in that: An enlarged portion is formed at one end of the through hole close to the clamping assembly; in the locked state, the clamping claw is partially accommodated in the enlarged portion, and the two clamping sections are close to each other and abut against the inner wall of the enlarged portion; In the unlocked state, the clamping claw extends from the inner portion of the enlarged portion, and the two clamping sections are spaced apart.

9. The fusion cage quick holding device according to claim 1, characterized in that: The clamping assembly further includes a connecting portion provided at one end of the push rod inner rod, the connecting portion extending along the axial direction of the push rod inner rod, a connecting hole is provided on one side of the fusion device, and the connecting portion is configured to be inserted into the connecting hole.

10. The fusion cage quick holding device according to claim 1, characterized in that: A protrusion is provided on one side of the clamping section close to the inner rod of the push rod, a fixing groove is provided on the fusion device, and the protrusion is configured to be able to be seated in the fixing groove.

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