CN215306601U - Vertebral plate distraction device - Google Patents

Abstract

The utility model provides a vertebral plate distraction device. The lamina distraction device includes: the clamping mechanism comprises a clamping part for clamping or loosening the component to be mounted; the conveying mechanism comprises a fixed structure and a movable structure connected with the fixed structure, the clamping mechanism is connected with the fixed structure and movably arranged relative to the fixed structure, the movable structure comprises a connecting component capable of being connected with the piece to be implanted, and the movable structure is movably arranged relative to the fixed structure so as to drive the piece to be implanted to move along a preset path. According to the technical scheme, the vertebral plate opening device can accurately implant the part to be implanted into the vertebral plate while opening the vertebral plate in a limited visual field and an operable range, so that an operation is facilitated.

Description

Vertebral plate distraction device

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a vertebral plate distraction device.

Background

The spinal column of a human body comprises a spinal canal structure, the spinal canal can cause spinal canal stenosis due to various reasons, such as developmental spinal canal stenosis, cervical spondylosis, intervertebral disc protrusion, posterior longitudinal ligament ossification, ligamentum flavum and the like, if the spinal canal stenosis occurs, axial pain, limb pain, numbness, muscle weakness, paralysis and other symptoms caused by spinal cord compression can be caused, and the daily life of people is seriously influenced.

Open-door vertebroplasty (e.g., double-door or half-open vertebroplasty) is a common procedure for enlarging the spinal canal. In spinal laminoplasty, the usual surgical approach includes "single-door" or "double-door". The existing single-door operation usually adopts a single-side incision method to perform the distraction step of the vertebral plate, simple tools such as forceps and hooks are used for lifting the vertebral plate, and in the single-door operation, the muscle and ligament attached to the spinous process are stripped thoroughly, the operable space is large in the operation, and the precise distraction is not needed, so that the distraction and the maintenance of the surgical vertebral plate can be sufficiently met by using the simple tools such as the forceps and the hooks. However, sometimes a bilateral incision of the vertebral plate is needed, the gap is propped open to lift the spinous process, an artificial bone or a substitute filling block is added in the gap and is matched with the vertebral plate for connection and fixation, commonly called as "apical grafting", the propping open of the spinous process in the operation can not be the propping open vertical to the incised plane, but the spinous process part is required to prop open backwards vertical to the human coronal plane, and the operation is different from the traditional laminoplasty, the muscle and ligament attached to the spinous process do not need to be stripped, the implantation of the artificial vertebral plate prosthesis is only needed under the condition of only one small incision on each of two sides, however, the field of view and the operable range in the operation are very limited, and the muscle ligament attached to the spinous process in the propping open process often has certain resistance to the propping open of the vertebral plate; therefore, in the "lift-off operation", the distraction tool used in the above-mentioned single-door opening is difficult to perform distraction of the vertebral plate in a direction perpendicular to the human coronal plane due to the limited field of view, and it is also difficult to perform firm distraction of the vertebral plate and maintenance after distraction due to the resistance of the spinous process to adhere to the muscular ligament, and it is more difficult to perform precise implantation of the artificial vertebral plate prosthesis during distraction.

At present, in the "lift surgery", the clamping mechanism for opening the vertebral plate and the delivery mechanism for clamping the to-be-implanted member are two mechanisms which are separately arranged and independent from each other, and the implantation of the to-be-implanted member to the vertebral plate needs to be performed in the opened state of the vertebral plate, however, because the visual field and the operable range in the surgery are very limited, the to-be-implanted member is accurately implanted to the vertebral plate while the opening of the vertebral plate is difficult to be realized in the limited visual field and the operable range, and the surgery is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a vertebral plate strutting device which can realize the distraction of the vertebral plate in a limited visual field and an operable range and simultaneously accurately implant an implant to be implanted to the vertebral plate so as to facilitate the operation.

To achieve the above objects, the present invention provides a lamina spacer device comprising: the clamping mechanism comprises a clamping part for clamping or loosening the component to be mounted; the conveying mechanism comprises a fixed structure and a movable structure connected with the fixed structure, the clamping mechanism is connected with the fixed structure and movably arranged relative to the fixed structure, the movable structure comprises a connecting component capable of being connected with the piece to be implanted, and the movable structure is movably arranged relative to the fixed structure so as to drive the piece to be implanted to move along a preset path.

Furthermore, the fixed structure comprises a first plate body connected with the clamping mechanism and a second plate body connected with the first plate body, and the movable structure is connected with the second plate body and movably arranged relative to the second plate body.

Furthermore, fixed knot constructs including two second plate bodys along the first direction interval setting, and two second plate bodys all are connected with first plate body, and the direction that the movable structure removed for the second plate body has the contained angle between with the first direction.

Furthermore, a guide groove is formed in the second plate body, and the movable structure is movably arranged along the guide groove under the action of self gravity.

Furthermore, the guide groove comprises a first groove section and a second groove section communicated with the first groove section, and an included angle is formed between the central axis of the first groove section and the central axis of the second groove section; or the second plate body comprises a first plate section connected with the first plate body and a second plate section connected with the first plate section, and the first plate section and the second plate section are arranged at an included angle.

Further, the connecting member comprises a connecting plate connected with the fixation structure and a fixture connected with the connecting plate, the fixture is rotatably arranged relative to the connecting plate, and the fixture is used for connecting or releasing the implant to be implanted.

Furthermore, at least part of the outer wall surface of the fixing piece is provided with external threads so as to enable the fixing piece to be in threaded fit with the piece to be implanted; alternatively, the mobile structure further comprises a locking member connected to the connection plate to lock the connection plate to the fixed structure.

Further, the lamina distraction device can further include a drive mechanism, the clamping mechanism can be coupled to the fixation structure via the drive mechanism, and at least a portion of the drive mechanism can be movably disposed relative to the fixation structure.

Further, the drive mechanism includes: the clamping mechanism is connected with the fixed structure through the supporting seat; the rack is arranged on the fixed structure; the gear is arranged on the supporting seat and is rotatably arranged relative to the supporting seat, and the gear is meshed with the rack to drive the supporting seat and the clamping mechanism to move.

Further, the drive mechanism further includes: one end of the elastic piece is connected with the supporting seat, and the other end of the elastic piece is clamped with the rack; or the knob is connected with the gear and can be rotatably arranged relative to the supporting seat.

Further, fixture still includes adjustment structure, first centre gripping arm and with first centre gripping arm pivotal connection's second centre gripping arm, first centre gripping arm and second centre gripping arm all have relative first end and the second end that sets up, the first end of first centre gripping arm and the first end of second centre gripping arm all are connected with adjustment structure, the second end of first centre gripping arm and the second end of second centre gripping arm are close to each other or keep away from in order to form the clamping part, adjustment structure is used for adjusting the distance between the second end of first centre gripping arm and the second end of second centre gripping arm.

Furthermore, adjust the structure and include the head rod and the regulating part of being connected with the head rod, first centre gripping arm and second centre gripping arm all are connected with the head rod, and the regulating part is located one side of keeping away from the second centre gripping arm of first centre gripping arm, and regulating part and first centre gripping arm homogeneous phase are for the movably setting of head rod.

Furthermore, a through hole is formed in the first clamping arm, one end of the first connecting rod is pivotally connected with the second clamping arm, and the other end of the first connecting rod penetrates through the through hole to be connected with the adjusting piece; or, at least part of the outer wall surface of the first connecting rod is provided with external threads, the adjusting piece is a nut, and the adjusting piece is in threaded connection with the first connecting rod; or, the adjusting structure further comprises a limiting part connected with the first connecting rod, and the adjusting part is located between the limiting part and the first clamping arm.

Further, the second end of the first clamping arm and the second end of the second clamping arm bend towards the side far away from the conveying mechanism.

By applying the technical scheme of the utility model, the clamping mechanism and the conveying mechanism are connected to form an integral structure, the clamping mechanism is used for distracting the vertebral plate, the fixed structure is used for supporting the clamping mechanism and the movable structure, the movable structure is used for connecting and conveying the piece to be implanted, so that the piece to be implanted can move to the distracted vertebral plate along a preset path, and the movable structure releases the piece to be implanted under the action of external force, thereby realizing the accurate implantation of the piece to be implanted. In other words, when the vertebral plate is distracted by the clamping mechanism, the clamping mechanism and the conveying mechanism are integrated, the movable structure can be used for connecting and conveying the part to be implanted to the distracted vertebral plate, and then the movable structure can release the part to be implanted by external force, so that the part to be implanted is accurately implanted to the distracted vertebral plate, and the aim of accurately implanting the part to be implanted to the vertebral plate while distracting the vertebral plate is fulfilled; the clamping mechanism is connected with the movable structure through the fixed structure, the aim of distracting the vertebral plate can be achieved through the movement of the clamping mechanism relative to the fixed structure, and the aim of conveying the part to be implanted to the distracted vertebral plate can be achieved through the movement of the movable structure relative to the fixed structure, so that the requirement of the vertebral plate distracting device on the visual field and the operable range is low; in conclusion, the vertebral plate strutting device can realize the purpose of strutting the vertebral plate and accurately implanting the part to be implanted into the vertebral plate in a limited visual field and an operable range, and is convenient for the operation.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 illustrates a schematic structural view of an embodiment of a lamina distractor device according to the utility model;

FIG. 2 shows a side view of the lamina distraction device of FIG. 1;

FIG. 3 shows a schematic view of another angled configuration of the lamina distraction device of FIG. 1;

FIG. 4 shows a schematic structural view of the clamping mechanism of the lamina distraction device of FIG. 1;

FIG. 5 shows a side view of the clamping mechanism of FIG. 4;

FIG. 6 shows a schematic structural view of the delivery and drive mechanisms of the lamina distraction device of FIG. 1 (with the implant installed);

FIG. 7 shows a partial cross-sectional view of FIG. 6;

FIG. 8 is a schematic diagram showing the structure of the moving structure of the conveying mechanism of FIG. 6;

FIG. 9 shows a schematic view of the structure of FIG. 8 from another angle;

figure 10 shows a schematic view of the structure of the lamina spacer device of figure 1 applied to a lamina (wherein the clamp holds the implant to be implanted);

FIG. 11 shows another structural schematic of FIG. 10 (in which the clamping mechanism distracts the lamina;

FIG. 12 shows another structural schematic of FIG. 11 (with the implant positioned at the distracted lamina);

FIG. 13 shows a side view of FIG. 12; and

FIG. 14 shows a schematic view of the structure of the implant to be mounted to the lamina.

Wherein the figures include the following reference numerals:

10. a clamping mechanism; 11. a clamping portion; 12. an adjustment structure; 13. a first clamp arm; 14. a second clamp arm; 15. a first connecting rod; 16. an adjustment member; 17. a limiting member; 20. a component to be mounted; 21. a lamina portion; 22. a vertebral body portion; 30. a conveying mechanism; 31. a fixed structure; 32. a movable structure; 33. a connecting member; 34. a first plate body; 35. a second plate body; 351. a first plate section; 352. a second plate section; 36. a guide groove; 361. a first groove section; 362. a second groove section; 37. a connecting plate; 38. a fixing member; 39. a locking member; 40. an implant; 50. a drive mechanism; 51. a supporting seat; 52. a rack; 53. a gear; 54. an elastic member; 55. a knob.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the utility model.

Aiming at the problems that the prior clamping mechanism and the prior conveying mechanism are mutually independent mechanisms, and the visual field and the operable range in the operation of the 'lifting operation' are very limited, so that the vertebral plate is difficult to be unfolded in the limited visual field and the operable range, and simultaneously, the part to be implanted is accurately implanted to the vertebral plate, and the operation is inconvenient, the utility model provides the vertebral plate unfolding device.

It should be noted that in the present invention and the embodiments of the present invention, the component to be installed 20 is a vertebral plate (which includes a vertebral plate portion 21 and a vertebral body portion 22), and the implant 40 is an artificial vertebral plate prosthesis.

In an embodiment of the present invention, as shown in figures 1-3, a lamina distractor device includes a clamping mechanism 10 and a delivery mechanism 30, the clamping mechanism 10 including a clamping portion 11 for clamping or unclamping a member 20 to be installed; the delivery mechanism 30 comprises a fixed structure 31 and a movable structure 32 connected with the fixed structure 31, the holding mechanism 10 is connected with the fixed structure 31 and movably arranged relative to the fixed structure 31, the movable structure 32 comprises a connecting member 33 capable of being connected with the to-be-implanted part 40, and the movable structure 32 is movably arranged relative to the fixed structure 31 to drive the to-be-implanted part 40 to move along a predetermined path.

In the above arrangement, the clamping mechanism 10 and the delivery mechanism 30 are connected to form an integrated structure, the clamping mechanism 10 is used for distracting the vertebral plate, the fixing structure 31 is used for supporting the clamping mechanism 10 and the movable structure 32, and the movable structure 32 is used for connecting and delivering the to-be-implanted component 40, so that the to-be-implanted component 40 can move to the distracted vertebral plate along a predetermined path, and under the action of external force, the movable structure 32 releases the to-be-implanted component 40, thereby realizing accurate implantation of the to-be-implanted component 40.

In other words, when the vertebral plate is distracted by the clamping mechanism 10, the clamping mechanism 10 and the conveying mechanism 30 are integrated, the movable structure 32 can be used for connecting and conveying the part to be implanted 40 to the distracted vertebral plate, and then the movable structure 32 can release the part to be implanted 40 by external force, so that the part to be implanted 40 is accurately implanted to the distracted vertebral plate, and the purpose of accurately implanting the part to be implanted 40 to the vertebral plate while distracting the vertebral plate is achieved; the clamping mechanism 10 is connected with the movable structure 32 through the fixed structure 31, and the clamping mechanism 10 can move relative to the fixed structure 31 to achieve the purpose of distracting the vertebral plate, and the movable structure 32 can move relative to the fixed structure 31 to achieve the purpose of delivering the implant 40 to the distracted vertebral plate, so that the requirement on the visual field and the operable range of the vertebral plate distracting device is low; in conclusion, the vertebral plate strutting device can realize the purpose of strutting the vertebral plate and accurately implanting the part to be implanted into the vertebral plate in a limited visual field and an operable range, and is convenient for the operation.

Specifically, the clamping portion 11 clamps the vertebral plate portion 21 of the component 20 to be installed, and the clamping mechanism 10 moves relative to the fixing structure 31, so that the clamping portion 11 drives the vertebral plate portion 21 to be far away from the vertebral body portion 22, thereby achieving the purpose of distracting the vertebral plate by the clamping mechanism 10; the connecting member 33 connects or releases the to-be-implanted member 40; after the implant 40 is implanted into the lamina, the clamp 11 releases the member 20 to be installed, the connecting member 33 releases the implant 40 and the lamina distractor device can be removed.

It should be noted that the predetermined path refers to a moving path that can move the movable structure 32 relative to the fixed structure 31 so as to make the movable structure 32 close to or away from the clamping portion 11, that is, a moving path that can move the movable structure 32 with the implant 40 toward the clamping portion 11 so as to move the implant 40 to the part 20 to be mounted, which is clamped by the clamping portion 11; in the embodiment of the present invention, the movable structure 32 moves along the guiding slot 36 relative to the fixed structure 31, so that the moving path defined by the guiding slot 36 forms the predetermined path, and the movable structure 32 carries the to-be-implanted component 40 along the guiding slot 36, so that the to-be-implanted component 40 can move to the to-be-installed component 20 (i.e. the distracted vertebral plate) for the purpose of implanting the to-be-implanted component 40.

In the technical scheme of this application, the vertebral lamina struts the device and can realize under limited field of vision and operating range that the gap struts and make the spinous process move backward perpendicularly, reaches the purpose that enlarges intervertebral foramen to can effectively keep the position of strutting of spinous process part, make artifical vertebral lamina prosthesis can be accurate implantation in the gap simultaneously.

In the vertebral plate distraction device for the 'lifting operation', which is known by the inventor, the front part of the distraction claw and the supporting claw are attached together and used for jointly extending into a lateral incision of the vertebral plate, the upper claw of the distraction claw can be distracted by a gripping handle so as to realize the effect of lifting and distracting the incision, and the tool can achieve the effective stable distraction of the vertebral plate in the 'lifting operation'.

Although the tool can realize firm distraction of the vertebral plate, the tool can only realize distraction of the vertebral plate, and after the tool is used, an extra tool is often needed to effectively support the distracted vertebral plate and a clamping tool is often needed to hold and implant the artificial vertebral plate prosthesis, that is, the vertebral plate distraction device can not realize the function of implanting the artificial vertebral plate prosthesis while distracting, when the tool is used for implanting the artificial vertebral plate prosthesis, a plurality of medical personnel are often needed to cooperatively use a plurality of tools to implant the prosthesis, the prosthesis is often difficult to accurately implant to the expected position, and the postoperative vertebral plate distraction effect is often not ideal; compared with the prior art, the vertebral plate strutting device can realize accurate and simple implantation of an artificial vertebral plate prosthesis (namely the part to be implanted 40), and simultaneously comprises the clamping mechanism 10 and the conveying mechanism 30, when the vertebral plate strutting device is used, one hand operates the clamping mechanism 10 to realize the strutting function, the other hand operates the conveying mechanism 30, the part to be implanted 40 is conveyed to the strutting vertebral plate position through the conveying mechanism 30 and the part to be implanted 40 is released, the vertebral plate strutting device can realize strutting and maintain the strutting state and accurately implant the part to be implanted 40 at the same time, the operation efficiency and the operation effect are ensured, in addition, the strutting device can finish the strutting action and the implantation action through single operation without cooperation of multiple persons, the medical resource can be saved, the utilization rate is improved, the operation process is simplified, is convenient for the operation.

The 'lifting top operation' is a novel vertebral body laminoplasty in recent years, and has a wide market development prospect because muscle ligaments of a human body can be effectively protected in the operation, the phenomenon that a door is opened and the vertebral plate is closed again can be effectively prevented after the operation, and the physiological form of cervical vertebra of the human body can be maintained. However, if the existing tools on the market are used for operation, the defects of simplicity, complex operation and the like are often caused, and the accurate implantation of the artificial vertebral plate prosthesis in the operation type (namely, the operation mode) is difficult to realize, so that the accurate restoration of the anatomical form and the stability of a mechanical model cannot be realized after the operation, the learning curve of the operation type is longer due to the defects, the learning difficulty is higher, and the popularization of the operation type is limited to a great extent. In the technical scheme of this application, the vertebral plate struts the device and can make this operation simple and easy, and can realize artificial vertebral plate prosthesis's accurate implantation, and it has greatly reduced the study time when guaranteeing the operation effect, has swept an obstacle for the popularization of this art formula.

As shown in fig. 1 to 3, 6 and 7, in the embodiment of the present invention, the fixed structure 31 includes a first plate 34 connected to the clamping mechanism 10 and a second plate 35 connected to the first plate 34, and the movable structure 32 is connected to the second plate 35 and movably disposed relative to the second plate 35.

In the above arrangement, the fixed structure 31 supports the clamping mechanism 10 and the movable structure 32, the clamping mechanism 10 is connected with the first plate 34 and is movable relative to the first plate 34, and the movable structure 32 is connected with the second plate 35 and is movable relative to the second plate 35, so that mutual interference between the clamping mechanism 10 and the movable structure 32 can be avoided, and smooth movement of the clamping mechanism 10 and the movable structure 32 can be ensured.

As shown in fig. 1 and 7, in the embodiment of the present invention, the fixed structure 31 includes two second plate bodies 35 disposed at intervals along a first direction, and both of the two second plate bodies 35 are connected to the first plate body 34, and the first direction has an angle with a direction in which the movable structure 32 moves relative to the second plate bodies 35. In the above arrangement, the movable structure 32 is movable relative to the second plate 35, and the two second plates 35 are provided to improve the stability of the movement of the movable structure 32.

Preferably, in an embodiment of the present invention, the first direction is perpendicular to a direction in which the movable structure moves relative to the second plate body.

As shown in fig. 1, 2 and 6, in the embodiment of the present invention, the second plate 35 is provided with a guide groove 36, and the movable structure 32 is movably disposed along the guide groove 36 under the action of its own weight. By providing the guide slot 36 on the second plate 35, the movable structure 32 is movably arranged along the guide slot 36 relative to the second plate 35, so that the movable structure 32 can be moved along the guide slot 36 to the distracted vertebral plate.

Preferably, in the embodiment of the present invention, the two second plates 35 are provided with the guide grooves 36, so as to improve the moving stability of the movable structure 32. Of course, in alternative embodiments not shown in the drawings of the present application, other structures capable of realizing guiding, such as linear guide rails, may be disposed on the second plate body 35 according to actual needs to guide the movable structure 32.

As shown in Figs. 8 and 9, in the embodiment of the present invention, the connecting member 33 includes a connecting plate 37 connected to the fixing structure 31 and a fixing member 38 connected to the connecting plate 37, the fixing member 38 being rotatably provided with respect to the connecting plate 37, the fixing member 38 being used to connect or release the to-be-implanted member 40.

In the above arrangement, the connecting plate 37 supports the fixing member 38, and the fixing member 38 can be connected with the component to be implanted 40 or release the component to be implanted 40, so that the movable structure 32 can be connected with, deliver or release the component to be implanted 40, and the purpose of implanting the component to be implanted 40 into the vertebral plate by the vertebral plate distracting device can be achieved; the fixing member 38 is rotated relative to the coupling plate 37 for the purpose of coupling the fixing member 38 with the member to be implanted 40 or releasing the member to be implanted 40.

Preferably, in the embodiment of the present invention, at least a portion of the outer wall surface of the fixing member 38 is provided with external threads so that the fixing member 38 is threadedly engaged with the to-be-implanted member 40. The implant 40 is provided with a mounting hole, the fixing member 38 is screw-engaged with the implant 40 through an external thread on an outer surface thereof, and the fixing member 38 and the implant 40 can be connected or disconnected by screwing the fixing member 38, thereby achieving the purpose of connecting or releasing the implant 40 through the fixing member 38.

As shown in fig. 1, 2 and 6 to 9, in an embodiment of the utility model, the mobile structure 32 further comprises a locking member 39 associated with the connection plate 37 to lock the connection plate 37 to the fixed structure 31. The locking member 39 is connected to and cooperates with the connecting plate 37 to achieve the purpose of locking the connecting plate 37 to the fixed structure 31. Specifically, the locking member 39 is inserted into the guide slot 36, one end of the locking member 39 passes through the guide slot 36 and then is in threaded fit with the connecting plate 37, the other end of the locking member 39 can be close to or far away from the connecting plate 37 by screwing the locking member 39, when the locking member 39 is close to the connecting plate 37, the locking member 39 can lock the connecting plate 37 on the fixed structure 31, the relative position of the movable structure 32 and the fixed structure 31 is fixed, when the locking member 39 is far away from the connecting plate 37, the locking member 39 does not lock the connecting plate 37, and the movable structure 32 can move relative to the fixed structure 31.

In an embodiment of the present invention, shown in figures 1-3, the lamina distraction device further includes a drive mechanism 50, the clamping mechanism 10 is coupled to the fixation structure 31 via the drive mechanism 50, and at least a portion of the drive mechanism 50 is movably disposed relative to the fixation structure 31. The clamping mechanism 10 and the fixed structure 31 are both connected with the driving mechanism 50, the fixed structure 31 supports the clamping mechanism 10 and the driving mechanism 50, at least part of the driving mechanism 50 moves relative to the fixed structure 31 to drive the clamping mechanism 10 to move relative to the fixed structure 31, and the clamping mechanism 10 can be movably arranged relative to the fixed structure 31 under the driving of the driving mechanism 50.

As shown in fig. 6 and 7, in the embodiment of the present invention, the driving mechanism 50 includes a supporting seat 51, a rack 52 and a gear 53, and the clamping mechanism 10 is connected to the fixing structure 31 through the supporting seat 51; the rack 52 is arranged on the fixed structure 31; the gear 53 is disposed on the supporting base 51 and is rotatable relative to the supporting base 51, and the gear 53 is engaged with the rack 52 to drive the supporting base 51 and the clamping mechanism 10 to move.

In the above arrangement, the clamping mechanism 10 is connected to the supporting base 51, the gear 53 on the supporting base 51 is engaged with the rack 52 on the fixed structure 31, the gear 53 can move along the rack 52, and the supporting base 51 and the clamping mechanism 10 both move relative to the fixed structure 31 under the driving of the gear 53, thereby achieving the purpose of making the clamping mechanism 10 movable relative to the fixed structure 31 by the driving mechanism 50.

Preferably, in the embodiment of the present invention, the rack 52 is disposed on the first plate 34. Preferably, the gear 53 is a ratchet.

As shown in fig. 1 and 7, in the embodiment of the present invention, the driving mechanism 50 further includes an elastic member 54, one end of the elastic member 54 is connected to the supporting seat 51, and the other end of the elastic member 54 is engaged with the rack 52. The supporting seat 51 and the rack 52 are both connected with the elastic piece 54, and the relative position of the supporting seat 51 and the rack 52 can be fixed through the clamping fit between the elastic piece 54 and the rack 52, so that the relative position of the clamping mechanism 10 and the fixed structure 31 is fixed, the clamping mechanism 10 is kept at a moving position relative to the fixed structure 31, and the clamping part 11 can clamp the component 20 to be mounted and is kept at an expansion position.

Preferably, the elastic member 54 is a spring plate.

As shown in fig. 1 and 6, in the embodiment of the present invention, the driving mechanism 50 further includes a knob 55 connected to the gear 53, and the knob 55 is rotatably disposed with respect to the support base 51. The gear 53 can be conveniently operated by applying an external force to the knob 55 to rotate the gear 53, and the purpose of moving the clamping mechanism 10 relative to the fixed structure 31 can be relatively easily achieved by providing the knob 55.

Preferably, in the embodiment of the present invention, the supporting seat 51 has an accommodating cavity, the gear 53 and at least a portion of the rack 52 are both located in the accommodating cavity, so that the gear 53 and at least a portion of the rack 52 are not exposed to the outside, the gear 53 and the rack 52 are safely and possibly protected, and the knob 55 is located outside the supporting seat 51, which facilitates the operation.

As shown in fig. 1, 3 to 5, in an embodiment of the present invention, the clamping mechanism 10 further includes an adjusting structure 12, a first clamping arm 13 and a second clamping arm 14 pivotally connected to the first clamping arm 13, each of the first clamping arm 13 and the second clamping arm 14 has a first end and a second end disposed opposite to each other, each of the first end of the first clamping arm 13 and the first end of the second clamping arm 14 is connected to the adjusting structure 12, the second end of the first clamping arm 13 and the second end of the second clamping arm 14 are close to or far from each other to form a clamping portion 11, and the adjusting structure 12 is used for adjusting a distance between the second end of the first clamping arm 13 and the second end of the second clamping arm 14.

In the above arrangement, the second end of the first holding arm 13 and the second end of the second holding arm 14 cooperate to form the holding portion 11, and the second end of the first holding arm 13 and the second end of the second holding arm 14 approach each other to hold the component 20 to be mounted or move away from each other to release the component 20 to be mounted; the adjusting structure 12 can adjust the distance between the first end of the first clamping arm 13 and the first end of the second clamping arm 14, and the first clamping arm 13 and the second clamping arm 14 are pivotally connected, so that the distance between the second end of the first clamping arm 13 and the second end of the second clamping arm 14 can be adjusted by the adjusting structure 12, the distance between the second end of the first clamping arm 13 and the second end of the second clamping arm 14 is adapted to the size of the component 20 to be mounted, and the clamping part 11 can clamp the component 20 to be mounted more stably and firmly.

Preferably, in the embodiment of the present invention, the first clamping arm 13 is pivotally connected to the second clamping arm 14 through a rotating shaft, and the supporting seat 51 is connected to the rotating shaft, so as to achieve the purpose of connecting the clamping mechanism 10 to the supporting seat 51. Preferably, the shaft is threadedly coupled to the support base 51.

As shown in fig. 1, 3 and 4, in the embodiment of the present invention, the adjusting structure 12 includes a first connecting rod 15 and an adjusting member 16 connected to the first connecting rod 15, the first clamping arm 13 and the second clamping arm 14 are both connected to the first connecting rod 15, the adjusting member 16 is located on a side of the first clamping arm 13 away from the second clamping arm 14, and the adjusting member 16 and the first clamping arm 13 are both movably disposed relative to the first connecting rod 15.

In the above arrangement, the second holding arm 14 is connected to the first holding arm 13 through the first connecting rod 15, and since the first holding arm 13 is movable relative to the first connecting rod 15, the first end of the first holding arm 13 can be closer to or farther from the first end of the second holding arm 14, that is, the distance between the first end of the first holding arm 13 and the first end of the second holding arm 14 is adjustable; the adjustment member 16 is movable relative to the first connecting rod 15, by means of which adjustment member 16 an extreme position of the first end of the first holding arm 13 remote relative to the first end of the second holding arm 14 can be defined, with the purpose of adjusting the distance between the second end of the first holding arm 13 and the second end of the second holding arm 14 by means of the adjustment structure 12 being achieved.

Preferably, in the embodiment of the present invention, a through hole is formed on the first clamping arm 13, one end of the first connecting rod 15 is pivotally connected to the second clamping arm 14, and the other end of the first connecting rod 15 penetrates through the through hole to be connected to the adjusting member 16. The first connecting rod 15 is arranged in the through hole on the first clamping arm 13 in a penetrating way, so that the first clamping arm 13 can move relative to the first connecting rod 15; since the connection point of the first connecting rod 15 and the second gripping arm 14 is fixed, in order to ensure that the first gripping arm 13 is movable relative to the first connecting rod 15, it is necessary to arrange the first connecting rod 15 in pivotal connection with the second gripping arm 14.

As shown in fig. 4, in the embodiment of the present invention, at least a portion of the outer wall surface of the first connecting rod 15 is provided with an external thread, the adjusting member 16 is a nut, and the adjusting member 16 is screwed with the first connecting rod 15. The first connecting rod 15 is in threaded engagement with an adjusting element 16, and the adjusting element 16 can be moved relative to the first connecting rod 15 by screwing the adjusting element 16, so that a limit position is defined at which the first end of the first holding arm 13 is distanced relative to the first end of the second holding arm 14, with the purpose of adjusting the distance between the second end of the first holding arm 13 and the second end of the second holding arm 14 by means of the adjusting structure 12.

As shown in fig. 1, 3 and 4, in the embodiment of the utility model, the adjusting structure 12 further includes a limiting member 17 connected to the first connecting rod 15, and the adjusting member 16 is located between the limiting member 17 and the first clamping arm 13. The limiting member 17 is located on a side of the adjusting member 16 away from the first clamping arm 13, and a limit position of the adjusting member 16 moving relative to the first connecting rod 15 can be limited by the limiting member 17, so that a limit position of the first end of the first clamping arm 13 away from the first end of the second clamping arm 14 is limited.

Preferably, the limiting member 17 is integrally formed with the first connecting rod 15. Of course, in an alternative embodiment of the present application, the limiting member 17 may be provided separately from the first connecting rod 15.

As shown in fig. 1 and 5, in the embodiment of the present invention, the second end of the first gripper arm 13 and the second end of the second gripper arm 14 are both bent toward a side away from the conveying mechanism 30. The second end of the first holding arm 13 and the second end of the second holding arm 14 cooperate to form the holding portion 11, and by the above arrangement, the holding portion 11 can hold the component 20 to be mounted relatively easily and easily.

As shown in fig. 1, 2 and 6, in the embodiment of the present invention, the guide groove 36 includes a first groove segment 361 and a second groove segment 362 communicated with the first groove segment 361, and a central axis of the first groove segment 361 and a central axis of the second groove segment 362 form an included angle. Second groove segment 362 is for first groove segment 361 to buckle towards fixture 10 place one side, treats that implant 40 removes to the vertebral plate department that struts along first groove segment 361 and second groove segment 362 in proper order, through the aforesaid setting, can treat the removal of implant 40 on the one hand and cushion, avoids assaulting, and on the other hand can improve the accuracy of treating implant 40 and implanting, makes to treat implant 40 and vertebral plate laminate more, improves the implantation effect.

As shown in fig. 1, 2 and 6, in the embodiment of the present invention, the second plate body 35 includes a first plate section 351 connected to the first plate body 34 and a second plate section 352 connected to the first plate section 351, the first plate section 351 and the second plate section 352 are disposed at an included angle, the first groove section 361 is disposed on the first plate section 351, and the second groove section 362 is disposed on the second plate section 352. The second plate 352 is bent towards the side of the clamping mechanism 10 relative to the first plate 351, so that the shape of the second plate 35 can be adapted to the shape of the clamping portion 11, on one hand, the first groove 361 and the second groove 362 are convenient to arrange, on the other hand, the accuracy of the implantation of the to-be-implanted part 40 can be improved, the to-be-implanted part 40 can be more fitted to the vertebral plate, and the implantation effect is improved.

As shown in fig. 1 and 10-14, in an embodiment of the present invention, the vertebral plate distraction device includes a clamping mechanism 10 and a delivery mechanism 30, the clamping mechanism 10 is connected to the delivery mechanism 30 through a driving mechanism 50, the clamping mechanism 10 includes an adjusting mechanism 12, a first clamping arm 13 and a second clamping arm 14, the first clamping arm 13 is pivotally connected to the second clamping arm 14 through a rotating shaft, the rotating shaft is threadedly connected to a supporting seat 51 of the driving mechanism 50, so as to achieve connection between the clamping mechanism 10 and the driving mechanism 50, the adjusting mechanism 12 includes a first connecting rod 15 connected to each of the first clamping arm 13 and the second clamping arm 14, an adjusting member 16 connected to the first connecting rod 15, and a limiting member 17 connected to the first connecting rod 15, the vertebral plate can be clamped by pinching the first clamping arm 13 and the second clamping arm 14, the first clamping arm 13 and the second clamping arm 14 can be maintained in a clamping position by the adjusting member 16, holding the holding mechanism 10 in a state of holding the member to be mounted 20; by screwing the knob 55, the gear 53 can be driven to rotate, the gear 53 is meshed with the rack 52, the gear 53 can move along the rack 52, and the gear 53 drives the supporting seat 51 and the clamping mechanism 10 to move relative to the fixed structure 31, so that the clamping mechanism 10 drives the vertebral plate part 21 to move towards the direction far away from the vertebral body part 22, and the aim of expanding the vertebral plate through the clamping mechanism 10 is fulfilled; the movable structure 32 is connected with the artificial vertebral plate prosthesis, the movable structure 32 moves relative to the fixed structure 31, so that the artificial vertebral plate prosthesis is driven to move to the opened vertebral plate, and the movable structure 32 is used for fixing the artificial vertebral plate prosthesis, so that the artificial vertebral plate prosthesis can be accurately implanted.

As shown in fig. 1, 10 to 14, in the embodiment of the present invention, when the vertebral plate distracting device is used, the vertebral plates on both sides of the vertebral plate are cut off in advance, so that the whole vertebral plate and the spinous process are in a free state. The use is divided into three stages, wherein the first stage is a placing stage, the clamping mechanism is connected with the conveying mechanism through the driving mechanism, the first clamping arm and the second clamping arm of the clamping mechanism are used for clamping the upper side and the lower side of the vertebral plate, the fixing structure is placed on the lateral mass of the vertebral plate, the bottom tip part of the fixing structure is used for temporary fixing, the vertebral plate distraction device is required to be vertically placed on the coronal surface, and after the whole set of vertebral plate distraction device is placed, the adjusting piece is rotated to enable the clamping part to effectively clamp the free vertebral plate; the second stage is a lifting stage, the fixing piece is screwed into a threaded hole of the artificial vertebral plate prosthesis to connect the prosthesis to fix the prosthesis, the connecting component and the prosthesis are fixed at the upper end of the second plate body by screwing the locking piece, the knob of the driving mechanism is rotated, the ratchet wheel slides upwards along the rack on the first plate body, and the elastic sheet can play a role of fixing after being rotated to drive the supporting seat and the clamping mechanism to integrally move upwards and stop when moving to a proper position; and the third stage is an implantation stage, after the lifting is finished, the locking part is loosened to enable the connecting component and the artificial vertebral plate prosthesis to slide to the interval after the vertebral plate is lifted along the guide groove, the fixing part is loosened, and the artificial vertebral plate prosthesis is fixed to the opened vertebral plate by screwing in the screw matched with the artificial vertebral plate prosthesis, so that the vertebral plate opening device can be removed.

The distance between the two second plates is 10mm to 14 mm (preferably 12 mm), which can allow the insertion of a conventional artificial vertebral plate prosthesis (about 10mm), when the knob is rotated, the gear drives the clamping mechanism to slide upwards, so as to drive the vertebral plate part to be upwards expanded relative to the vertebral body part, the expanding distance of the vertebral plate is controlled by controlling the rotating force, and the normal jacking distance is 6 mm to 8 mm; every time the ratchet wheel rotates 1 check, the rise top height is 0.5mm, through the steerable height of rising of the check number of control ratchet wheel pivoted in order to match the artificial vertebral plate prosthesis of different height specifications, the central axis of second groove section and the central axis of first groove section between the contained angle be 25 to 35 (preferably 30), unanimous with the vertebral plate excision direction in the ordinary lift top art for artificial vertebral plate prosthesis can accurate the implantation.

The technical scheme of the application has the following advantages:

1. the vertebral plate distraction device has comprehensive functions, realizes the distraction of the vertebral plate and can realize the connection, the transportation and the implantation of the artificial vertebral plate prosthesis;

2. the vertebral plate distraction device is easy to operate, the vertebral plate can be vertically distracted by rotating the knob, and the prosthesis can be implanted by loosening the locking piece;

3. this vertebral plate distraction device can realize accurate artifical vertebral plate prosthesis and implant, can implant the prosthesis accurately to the vertebral plate clearance through the guide way.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the clamping mechanism and the conveying mechanism are connected to form an integral structure, the clamping mechanism is used for propping open vertebral plates, the fixing structure is used for supporting the clamping mechanism and the movable structure, the movable structure is used for connecting and conveying the part to be implanted, the part to be implanted can move to the propped-open vertebral plates along a preset path, and under the action of external force, the movable structure releases the part to be implanted, so that accurate implantation of the part to be implanted is realized. In other words, when the vertebral plate is distracted by the clamping mechanism, the clamping mechanism and the conveying mechanism are integrated, the movable structure can be used for connecting and conveying the part to be implanted to the distracted vertebral plate, and then the movable structure can release the part to be implanted by external force, so that the part to be implanted is accurately implanted to the distracted vertebral plate, and the aim of accurately implanting the part to be implanted to the vertebral plate while distracting the vertebral plate is fulfilled; the clamping mechanism is connected with the movable structure through the fixed structure, the aim of distracting the vertebral plate can be achieved through the movement of the clamping mechanism relative to the fixed structure, and the aim of conveying the part to be implanted to the distracted vertebral plate can be achieved through the movement of the movable structure relative to the fixed structure, so that the requirement of the vertebral plate distracting device on the visual field and the operable range is low; in conclusion, the vertebral plate strutting device can realize the purpose of strutting the vertebral plate and accurately implanting the part to be implanted into the vertebral plate in a limited visual field and an operable range, and is convenient for the operation.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (14)

1. A lamina distraction device, comprising:

a clamping mechanism (10) comprising a clamping part (11) for clamping or loosening the component (20) to be installed;

the conveying mechanism (30) comprises a fixed structure (31) and a movable structure (32) connected with the fixed structure (31), the clamping mechanism (10) is connected with the fixed structure (31) and movably arranged relative to the fixed structure (31), the movable structure (32) comprises a connecting member (33) capable of being connected with the to-be-implanted part (40), and the movable structure (32) is movably arranged relative to the fixed structure (31) so as to drive the to-be-implanted part (40) to move along a preset path.

2. The lamina spacer device of claim 1, wherein the fixed structure (31) comprises a first plate (34) connected to the clamping mechanism (10) and a second plate (35) connected to the first plate (34), the movable structure (32) being connected to the second plate (35) and being movably disposed with respect to the second plate (35).

3. The lamina spacer device of claim 2, wherein the fixed structure (31) comprises two of the second plates (35) spaced apart in a first direction, both of the second plates (35) being connected to the first plate (34), the movable structure (32) being angled relative to the first direction relative to the direction in which the second plates (35) move.

4. The lamina spacer device of claim 2, characterized in that the second plate (35) is provided with a guide slot (36), the mobile structure (32) being movably arranged along the guide slot (36) under the effect of its own weight.

5. The lamina distraction device of claim 4,

the guide groove (36) comprises a first groove section (361) and a second groove section (362) communicated with the first groove section (361), and an included angle is formed between the central axis of the first groove section (361) and the central axis of the second groove section (362); alternatively, the first and second electrodes may be,

the second plate body (35) comprises a first plate section (351) connected with the first plate body (34) and a second plate section (352) connected with the first plate section (351), and the first plate section (351) and the second plate section (352) are arranged in an included angle mode.

6. The lamina spacer device of one of the claims 1 to 5, characterized in that the connecting member (33) comprises a web (37) connected to the fixing structure (31) and a securing element (38) connected to the web (37), the securing element (38) being rotatably arranged relative to the web (37), the securing element (38) being used to connect or release the implant (40).

7. The lamina distractor device of claim 6,

at least part of the outer wall surface of the fixing piece (38) is provided with external threads so that the fixing piece (38) is in threaded fit with the to-be-implanted piece (40); alternatively, the first and second electrodes may be,

the mobile structure (32) further comprises a locking element (39) associated with the connection plate (37) to lock the connection plate (37) to the fixed structure (31).

8. The lamina spacer device of any one of claims 1 to 5, characterized in that the lamina spacer device further comprises a drive mechanism (50), the clamping mechanism (10) being connected to the fixed structure (31) by the drive mechanism (50), at least part of the drive mechanism (50) being movably arranged relative to the fixed structure (31).

9. The lamina distraction device of claim 8, wherein the drive mechanism (50) comprises:

the supporting seat (51), the clamping mechanism (10) is connected with the fixed structure (31) through the supporting seat (51);

a rack (52) provided to the fixed structure (31);

the gear (53) is arranged on the supporting seat (51) and can rotate relative to the supporting seat (51), and the gear (53) is meshed with the rack (52) to drive the supporting seat (51) and the clamping mechanism (10) to move.

10. The lamina distraction device of claim 9, wherein the drive mechanism (50) further comprises:

one end of the elastic piece (54) is connected with the supporting seat (51), and the other end of the elastic piece (54) is clamped with the rack (52); alternatively, the first and second electrodes may be,

and the knob (55) is connected with the gear (53), and the knob (55) is rotatably arranged relative to the supporting seat (51).

11. The lamina distraction device of any one of claims 1-5, the clamping mechanism (10) further comprises an adjusting structure (12), a first clamping arm (13) and a second clamping arm (14) which is pivotally connected with the first clamping arm (13), the first clamping arm (13) and the second clamping arm (14) are provided with a first end and a second end which are arranged oppositely, the first end of the first gripping arm (13) and the first end of the second gripping arm (14) are both connected to the adjustment structure (12), a second end of the first clamp arm (13) and a second end of the second clamp arm (14) are close to or away from each other to form the clamp portion (11), the adjusting structure (12) is used for adjusting the distance between the second end of the first clamping arm (13) and the second end of the second clamping arm (14).

12. The lamina distractor device of claim 11, wherein the adjustment structure (12) includes a first connecting rod (15) and an adjustment member (16) connected to the first connecting rod (15), the first clamping arm (13) and the second clamping arm (14) each being connected to the first connecting rod (15), the adjustment member (16) being located on a side of the first clamping arm (13) remote from the second clamping arm (14), the adjustment member (16) and the first clamping arm (13) each being movably disposed relative to the first connecting rod (15).

13. The lamina distraction device of claim 12,

a through hole is formed in the first clamping arm (13), one end of the first connecting rod (15) is pivotally connected with the second clamping arm (14), and the other end of the first connecting rod (15) penetrates through the through hole to be connected with the adjusting piece (16); alternatively, the first and second electrodes may be,

at least part of the outer wall surface of the first connecting rod (15) is provided with external threads, the adjusting piece (16) is a nut, and the adjusting piece (16) is in threaded connection with the first connecting rod (15); alternatively, the first and second electrodes may be,

the adjusting structure (12) further comprises a limiting piece (17) connected with the first connecting rod (15), and the adjusting piece (16) is located between the limiting piece (17) and the first clamping arm (13).

14. The lamina distractor device of claim 11, wherein the second end of the first clamping arm (13) and the second end of the second clamping arm (14) are each bent toward a side away from the delivery mechanism (30).

Images