A screw implantation torque measuring device

Abstract

The application provides a screw implantation torque measuring device and belongs to the field of medical equipment. The device comprises a handheld end, the handheld end comprises a handle, a torque measuring part fixed at one end of the handle, and a driving part fixed at one end of the torque measuring part; the other end of the driving part is fixed with a stable anti-deviation assembly, and the stable anti-deviation assembly comprises a connecting rod fixed at the other end of the driving part, a limiting part sleeved outside the connecting rod, and a sleeve part rotationally connected outside the limiting part; the centering assembly is arranged to ensure that the driving part can be accurately centered with the screw head of the pedicle screw, the torque loss caused by the angle deviation can be effectively avoided, the driving part can directly and uniformly transmit the torque to the pedicle screw, the applied force can be ensured to completely act on the screw, the error is reduced, the accuracy of the torque measurement is improved, the applied torque can completely act on the screw, and the mechanical loss caused by the angle deviation is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical equipment, more particularly, to a screw implantation torque measuring device. BACKGROUND

[0002] In spinal surgery, the torque value when the screw is implanted is derived from the contact force between the screw and the bone interface. Real-time judgment of the screw torque during implantation is of great significance to the judgment of screw stability.

[0003] In order to measure the torque of the screw implanted in the bone and judge the stability of the screw implantation, the prior art CN117643496A discloses a thoracolumbar pedicle screw channel individualized implantation device. A torque measuring component is connected to one end of the holding assembly. The real-time torque can be measured during the screwing process. The user can know the hardness, density and other information of the patient's bone quality by measuring the real-time torque.

[0004] Although the screw implantation device in the prior art can realize real-time measurement of torque, before the pedicle screw is implanted into the bone, the driving head of the implantation device needs to be aligned with the driving groove of the pedicle screw, and then the pedicle screw is rotated and implanted into the bone by manually rotating the implantation device. In this process, if the contact angle of the driving head of the implantation device and the pedicle screw is not completely centered, the torque application direction may be deviated, the angle deviation may occur, and the torque transmission may be uneven, which affects the accuracy of the measured value and the judgment of the actual screw stability and the patient's bone quality. SUMMARY

[0005] In view of the problem in the prior art that the implantation device is manually rotated to drive the pedicle screw to rotate and be implanted into the bone, and if the contact angle of the driving head of the implantation device and the pedicle screw is not completely centered, the torque application direction may be deviated, the angle deviation may occur, and the torque transmission may be uneven, the purpose of the present application is to provide a screw implantation torque measuring device.

[0006] To solve the above problems, the present application adopts the following technical scheme:

[0007] A screw implantation torque measuring device, comprising a hand-held end, the hand-held end comprising a handle, a torque measuring part fixed to one end of the handle, and a driving part fixed to one end of the torque measuring part;

[0008] The other end of the driving part is fixed with a stable anti-deviation assembly, and the stable anti-deviation assembly comprises a connecting rod fixed to the other end of the driving part, a limiting part sleeved outside the connecting rod, a sleeve connected outside the limiting part, and a centering assembly connected to one side of the sleeve;

[0009] The centering assembly comprises four seat bodies connected to the lower end of the sleeve, four clamping parts rotatably connected to one side of the four seat bodies respectively, a plurality of pawls fixed to the outer surface of the four clamping parts, four rotating rods rotatably connected to the inside of the four seat bodies respectively, a limiting pawl fixed to the outside of the rotating rod for limiting the pawl, four knob parts rotatably connected to the outer surface of one side of the four seat bodies respectively, and the four knob parts are fixed to the four rotating rods respectively.

[0010] Optionally, the four clamping parts are rotatably connected to one side of the four seat bodies through four torsion springs respectively.

[0011] Optionally, a plurality of clamping grooves are formed in the outside of the connecting rod, the limiting part comprises a bearing inner ring movably sleeved on the outside of the connecting rod, a movable groove one formed in the inside of the bearing inner ring, a movable seat movably connected in the movable groove one, a clamping part integrally formed on one side of the movable seat for inserting into the clamping groove and limiting the connecting rod, a guide column one inserted into the inside of the movable seat and fixed to the inner wall of the movable groove one, a spring one sleeved on the outside of the guide column one, a displacement inclined groove formed in the inside of the movable seat, and a displacement assembly movably connected in the bearing inner ring and used for driving the movable seat to move, and the two ends of the spring one are connected to the inner wall of the movable groove one and one side of the movable seat respectively.

[0012] Optionally, the displacement assembly comprises a plurality of guide columns two movably inserted into the bearing inner ring, a spring two sleeved on the outside of the guide column two, a pressing plate fixed to one end of the guide column two, and an extension integrally formed on one side of the pressing plate, and the extension penetrates through the bearing inner ring and enters the displacement inclined groove, one side of the extension is provided with a slope matched with the displacement inclined groove, and the two ends of the spring two are connected to the pressing plate and one side of the bearing inner ring respectively.

[0013] Optionally, the sleeve comprises two ring bodies arranged in the upper and lower positions and a cover body connecting the two ring bodies, and a compression adjusting part is further connected in the inside of the sleeve, and the compression adjusting part comprises a bearing outer ring rotatably connected to the outside of the bearing inner ring and located in the sleeve, a guide rod one fixed to the inside of the sleeve, and a lead screw one screwed in the inside of the sleeve, the lead screw one is screwed in the bearing outer ring, one end of the lead screw one penetrates through the upper ring body and extends outward, and the bearing outer ring is movably sleeved on the outside of the guide rod one.

[0014] Optionally, the outside of the bearing inner ring is rotatably connected to the inner wall of the bearing outer ring.

[0015] Optionally, one side of one of the ring bodies is provided with a movable groove three, and the seat body is slidably connected in the movable groove three, a lead screw two is rotatably connected in the movable groove three, and the seat body is screwed on the outside of the lead screw two, and one end of the lead screw two penetrates through the ring body and extends outward.

[0016] Optionally, the clamping part is internally provided with a movable groove two, and a movable part is movably connected in the movable groove two, a guide rod two is fixedly connected to the inner wall of the movable groove two, and the movable part movably sleeves the guide rod two, one end of the movable part penetrates the movable groove two and outwardly extends to form an L-shaped extension end, and a spring three is sleeved on the outer portion of the guide rod two, and the two ends of the spring three are connected with the inner wall of the movable groove two and the movable part.

[0017] Optionally, the outer surface of the torque measuring part is connected with a conductive slip ring, the stator portion of the conductive slip ring is fixedly connected to the outer surface of the torque measuring part, the torque measuring part is rotatably connected with a sleeve body, the rotor portion of the conductive slip ring is fixedly connected to the inner wall of the sleeve body, and the outer surface of the sleeve body is fixedly connected with a display portion linearly connected with the rotor portion.

[0018] Optionally, the torque measuring part is further sleeved with a gripping part, and a plug rod is fixedly connected to one side of the gripping part, and a sleeve rod is fixedly connected to one side of the sleeve body, and the plug rod movably plugs in the sleeve rod.

[0019] Compared with the prior art, the technical scheme provided by the present application has at least the following beneficial effects:

[0020] In the above scheme, the centering assembly is provided, the four clamping parts can clamp the tail cap of the pedicle screw, the driving part can be accurately centered with the screw head of the pedicle screw, the torque loss caused by angle deviation can be effectively avoided, the driving part can directly and uniformly transmit the torque to the pedicle screw, the applied force can be completely applied to the screw, the error is reduced, the accuracy of torque measurement is improved, the applied torque can be completely applied to the screw, the mechanical loss caused by angle deviation is reduced, and the efficiency of screwdriver torque transmission is improved. This can ensure that the torque required during screw installation is completely effective, ensure accurate operation, and also reduce damage caused by uneven contact between the driving part and the screw head inner driving groove, protect the screw, prolong its service life, and avoid additional damage or placement failure.

[0021] By providing the limiting part, the connecting rod can be limited by the spring one, the movable seat and the clamping part, so that the connecting rod can only move in one direction towards the pedicle screw, ensuring that one end of the connecting rod is always tightly fitted in the screw inner driving groove for rotation, ensuring that all applied forces are directly used to rotate the screw, without being wasted in unnecessary directions. At the same time, it can also avoid the situation that the connecting rod jumps out of the screw inner driving groove when the torque is large, reducing the torque measurement error and operation interruption caused by the connecting rod jumping.

[0022] By setting the compression adjusting part, by rotating the screw rod one, the bearing outer ring, the bearing inner ring and the transmission rod move to the direction of the pedicle screw, the distance between the transmission rod end and the inner wall of the screw driving groove is reduced, the transmission rod end is in close contact with the inner wall of the screw driving groove, the torque instability caused by the unstable contact between the transmission rod and the screw is reduced, and the torque loss caused by the gap is avoided. In this way, it can ensure that every unit of torque can effectively act on the screw, improve the torque transmission efficiency, and the force can be more evenly distributed on the whole contact area, effectively avoiding the force concentrated in a certain point or a small area, reducing the local stress concentration, preventing damage to the screw or tool, making the torque transmission more direct and uniform, through the uniform distribution of contact pressure, the torque sensor can more accurately perceive the change of every unit of torque, reducing the measurement error caused by uneven force distribution. In this way, it helps to improve the stability and accuracy of torque measurement, making the measurement result more reliable. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the application and, together with the description, further serve to explain the principles of the application and to enable a person skilled in the relevant arts to implement and use the application.

[0024] Figure 1 is a schematic view of the three-dimensional structure of the present application;

[0025] Figure 2 is a schematic view of the stable anti-deviation assembly structure of the present application;

[0026] Figure 3 is a schematic view of the structure of the movable groove three and the screw rod two of the present application;

[0027] Figure 4 is a schematic view of the structure of the limiting part and the cover of the present application;

[0028] Figure 5 is a sectional view of the bearing inner ring of the present application;

[0029] Figure 6 is a schematic view of the structure of the guide rod one, the ring body and the bearing outer ring of the present application;

[0030] Figure 7 is a sectional view of the clamping part and the movable part of the present application;

[0031] Figure 8 is a schematic view of the structure of the present application Figure 7 is an enlarged schematic view of the structure at A in the present application;

[0032] Figure 9 is a sectional view of the seat body of the present application;

[0033] Figure 10 is a schematic view of the present applicationFigure 9 Structure enlarged schematic view at B;

[0034] Figure 11 Structure schematic view of conductive slip ring of the present application.

[0035] [Reference signs]

[0036] 1, hand-held end; 11, handle; 12, torque measurement part; 13, driving part; 14, conductive slip ring; 15, sleeve body; 16, display part; 17, sleeve rod; 18, insertion rod; 19, gripping part; 2, stable anti-deviation assembly; 21, connecting rod; 211, clamping groove; 22, limiting part; 221, bearing inner ring; 222, movable groove I; 223, movable seat; 2231, displacement inclined groove; 224, clamping part; 225, guide column I; 226, spring I; 227, pressing plate; 2271, extension part; 228, guide column II; 229, spring II; 23, pressing adjustment part; 231, screw I; 232, cover body; 233, guide rod I; 234, bearing outer ring; 235, ring body; 24, centering assembly; 241, seat body; 242, clamping part; 2421, movable groove II; 243, knob part; 244, rotating rod; 245, limiting claw; 246, pawl; 247, torsional spring; 248, movable part; 249, guide rod II; 250, spring III; 25, sleeve set; 251, movable groove III; 252, screw II.

[0037] As shown in the drawings, in order to clearly realize the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the present application in the specific structures, devices and environments, and those skilled in the art can adjust or modify these devices and environments according to specific needs. DETAILED DESCRIPTION

[0038] The present application will be described in detail below with reference to the drawings and specific embodiments. It should be noted that in order to make the embodiments more detailed, the following embodiments are the best, preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement them; and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the present application.

[0039] It should be noted that in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiments can include specific features, structures or characteristics, but not necessarily every embodiment includes the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it should be within the knowledge of those skilled in the art to realize this feature, structure or characteristic in combination with other embodiments (whether or not explicitly described).

[0040] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0041] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0042] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0043] like Figures 1 to 11 As shown, an embodiment of the present invention provides a screw insertion torque measuring device, including a handheld end 1, the handheld end 1 including a handle 11, a torque measuring part 12 fixed to one end of the handle 11, and a driving part 13 fixed to one end of the torque measuring part 12.

[0044] The other end of the drive unit 13 is fixedly connected to a stabilizing anti-deviation component 2, and the stabilizing anti-deviation component 2 includes a connecting rod 21 fixedly connected to the other end of the drive unit 13, a limiting part 22 sleeved outside the connecting rod 21, a kit 25 rotatably connected outside the limiting part 22, and a centering component 24 connected to one side of the kit 25.

[0045] The centering assembly 24 comprises four seat bodies 241 connected at the lower end of the sleeve 25, four clamping portions 242 rotatably connected at one side of the four seat bodies 241 respectively, a plurality of pawls 246 fixed on the outer surface of the four clamping portions 242, four rotating rods 244 rotatably connected inside the four seat bodies 241 respectively, limiting pawls 245 fixed on the outside of the rotating rods 244 for limiting the pawls 246, and four knob portions 243 rotatably connected on the outer surface of one side of the four seat bodies 241 respectively, and the four knob portions 243 are fixed with the four rotating rods 244 respectively.

[0046] The four clamping portions 242 are rotatably connected at one side of the four seat bodies 241 by four torsion springs 247 respectively.

[0047] By adopting the above technical scheme, the tail cap of the pedicle screw is placed below the sleeve 25, then the plurality of clamping portions 242 are rotated, the free end of the clamping portion 242 is rotated towards the direction of the tail cap, and due to the design of the limiting pawl 245, the pawl 246 can be limited, so that the free end of the clamping portion 242 can only be unidirectionally rotated towards the direction of the tail cap of the pedicle screw, so that the clamping portion 242 can clamp the tail cap of the pedicle screw, and since the plurality of clamping portions 242 clamp the tail cap of the pedicle screw in the middle, at this time the centering assembly 24, the limiting portion 22 and the sleeve 25 are positioned on the tail cap of the pedicle screw, then the handle 11 is held, the torque measuring portion 12 and the driving portion 13 are moved towards the direction of the tail cap of the pedicle screw through the handle 11, the connecting rod 21 fixed at one end of the driving portion 13 is inserted into the tail cap of the pedicle screw from the limiting portion 22, as shown in Figure 3 The hexagonal driving head at one end of the connecting rod 21 can be inserted into the internal hexagon of the pedicle screw (the cooperation mode can adopt the cooperation mode of the cross hole and the cross-shaped driving head, and the cooperation mode can adopt various cooperation modes in the prior art, which is not limited here), then the handle 11 is rotated to drive the torque measuring portion 12, the driving portion 13 and the connecting rod 21 to rotate, the connecting rod 21 rotates to drive the pedicle screw to rotate, so as to place the pedicle screw into the bone, and in this process, the torque measuring portion 12 can measure the torque generated during the rotation of the pedicle screw, the torque measuring portion 12 is a mature prior art, and its principle is the same as that of the digital torque driver, which is composed of a torque sensor (a core component of the torque driver, used to sense the torque value. The sensor converts the torque signal into an electric signal), a power supply (usually a built-in rechargeable battery or a replaceable battery, which provides power for the electronic part of the torque driver), a microprocessor (responsible for processing signals from the torque sensor and transmitting processed data to the display. It can also have other functions such as storage, alarm, peak holding, etc.), etc. Here, it is not repeated. By measuring the real-time torque, the user can determine whether the screw is stable.

[0048] Since the clamping portion 242 can clamp the tail cap of the pedicle screw, it ensures that the driving portion 13 can be accurately centered with the screw head of the pedicle screw, which can effectively avoid torque loss caused by angle deviation, the driving portion 13 can more directly and uniformly transmit torque to the pedicle screw, ensure that the applied force is completely applied to the screw, reduce errors, improve the accuracy of torque measurement, and also enable the applied torque to be completely applied to the screw, reducing mechanical loss caused by angle deviation, thereby improving the efficiency of screwdriver torque transmission, which can ensure that the torque required during screw installation is completely effective, ensuring accurate operation, while also reducing damage caused by uneven contact between the driving portion 13 and the screw head inner driving groove, protecting the screw and extending its service life, avoiding additional damage or placement failure. By rotating the knob portion 243, the rotating rod 244 can be rotated, which can drive the limiting claw 245 to rotate and separate the limiting claw 245 from the pawl 246, so that the limiting of the pawl 246 and the clamping portion 242 can be cancelled. When the limiting of the pawl 246 and the clamping portion 242 is cancelled, the free end of the clamping portion 242 can be rotated away from the pedicle screw under the action of the torsional spring 247, cancelling the clamping and centering of the pedicle screw.

[0049] As shown in Figure 4 and Figure 5 The connecting rod 21 is externally provided with a plurality of clamping grooves 211, the limiting portion 22 includes a bearing inner ring 221 movably sleeved outside the connecting rod 21, a movable groove one 222 formed in the inside of the bearing inner ring 221, a movable seat 223 movably connected in the movable groove one 222, a clamping portion 224 integrally formed on one side of the movable seat 223 for inserting the clamping groove 211 and limiting the connecting rod 21, a guide column one 225 inserted into the inside of the movable seat 223 and fixed at the other end in the inner wall of the movable groove one 222, a spring one 226 sleeved outside the guide column one 225, a displacement inclined groove 2231 formed in the inside of the movable seat 223, a displacement assembly movably connected in the bearing inner ring 221 and used for driving the movable seat 223 to move, and the two ends of the spring one 226 are respectively connected with the inner wall of the movable groove one 222 and one side of the movable seat 223.

[0050] The displacement assembly includes a plurality of guide columns two 228 movably inserted in the bearing inner ring 221, a spring two 229 sleeved outside the guide column two 228, a pressing plate 227 fixed at one end of the guide column two 228, an extension 2271 integrally formed on one side of the pressing plate 227, and the extension 2271 penetrates through the bearing inner ring 221 and enters the displacement inclined groove 2231, one side of the extension 2271 is provided with a slope matched with the displacement inclined groove 2231, and the two ends of the spring two 229 are respectively connected with the pressing plate 227 and one side of the bearing inner ring 221.

[0051] When the torque measuring portion 12 and the driving portion 13 are moved towards the tail cap of the pedicle screw by the handle 11, the connecting rod 21 moves in the bearing inner ring 221, and in the process of movement, the spring 226 pushes the movable seat 223 to move, and the clamping portion 224 enters the clamping groove 211, and since the side of the clamping portion 224 is beveled, when the connecting rod 21 moves, the inner wall of the clamping groove 211 contacts the side of the bevel of the clamping portion 224, thereby pushing the clamping portion 224 out of the clamping groove 211, so that the connecting rod 21 can only move in one direction towards the pedicle screw, and the spring 226 and the clamping portion 224 can limit the movement of the connecting rod 21, so that the connecting rod 21 cannot move away from the pedicle screw, and the end of the connecting rod 21 is always close to the screw inner hexagon for rotation, so that all the applied force is directly used for rotating the screw, and will not be wasted in unnecessary directions, and the situation that the hexagonal driving head at one end of the connecting rod 21 jumps out of the screw inner hexagon when the torque is large can be avoided, and the torque measurement error and operation interruption caused by the jumping of the connecting rod 21 can be reduced; after the measurement is completed, the pressing plate 227 is pressed, the pressing plate 227 is lowered and the spring 229 is squeezed, the extension 2271 can enter the displacement inclined groove 2231, the bevel on one side of the extension 2271 contacts the inner bevel of the displacement inclined groove 2231, thereby pushing the movable seat 223 to move in the movable groove 222 towards the spring 226, and the clamping portion 224 can be removed from the clamping groove 211, so that the limitation of the connecting rod 21 can be cancelled, and the connecting rod 21 can move away from the pedicle screw.

[0052] As shown in Figure 4 and Figure 6 The kit 25 includes two ring bodies 235 and a cover body 232 connecting the two ring bodies 235, and the sleeve body 15 is further connected with a compression adjusting portion 23, and the compression adjusting portion 23 includes a bearing outer ring 234 rotatably connected outside the bearing inner ring 221 and located in the kit 25, a guide rod 233 fixedly connected inside the kit 25, and a lead screw 231 screwed in the kit 25, the lead screw 231 is screwed in the bearing outer ring 234, and one end of the lead screw 231 extends outwardly through the upper ring body 235, and the bearing outer ring 234 is movably sleeved outside the guide rod 233.

[0053] The outer part of the bearing inner ring 221 is rotatably connected with the inner wall of the bearing outer ring 234.

[0054] By adopting the above technical scheme, although the clamping portion 224 can limit the connecting rod 21, when the hexagonal driving head at one end of the connecting rod 21 is inserted into the inner hexagon of the screw, there will still be a gap. In order to avoid the torque loss caused by the gap, the rotation of the lead screw 231 can drive the bearing outer ring 234 and the bearing inner ring 221 to move. When the bearing outer ring 234 and the bearing inner ring 221 move towards the pedicle screw, the clamping portion 224 inside the bearing inner ring 221 limits the connecting rod 21, so that the clamping portion 224 of the bearing inner ring 221 drives the connecting rod 21 to also move towards the pedicle screw, so that the hexagonal driving head of the connecting rod 21 can tightly fit in the inner hexagon of the screw, reducing the distance between the hexagonal driving head of the connecting rod 21 and the inner wall of the inner hexagon of the screw, reducing the torque instability caused by unstable contact between the hexagonal driving head of the connecting rod 21 and the inner wall of the inner hexagon of the screw, and avoiding the torque loss caused by the gap. In this way, it can ensure that every unit of torque can effectively act on the screw, improve the torque transmission efficiency, and at the same time, the force can be more evenly distributed on the entire contact area, effectively avoiding the force concentrated on a certain point or a small area, reducing the local stress concentration, preventing damage to the screw or tool, making the torque transmission more direct and uniform, and through the uniform distribution of contact pressure, the torque sensor can more accurately perceive the change of every unit of torque, reducing the measurement error caused by uneven force distribution. This helps to improve the stability and accuracy of torque measurement, making the measurement result more reliable.

[0055] As shown in Figure 3 , Figure 7 and Figure 8 , the ring body 235 is provided with a movable groove three 251 on one side, and the seat body 241 is slidably connected in the movable groove three 251. The movable groove three 251 is rotatably connected with a lead screw two 252, and the seat body 241 is screwed on the outside of the lead screw two 252. One end of the lead screw two 252 penetrates the ring body 235 and extends outward.

[0056] The clamping portion 242 is internally provided with a movable groove two 2421, and a movable portion 248 is movably connected in the movable groove two 2421. A guide rod two 249 is fixedly connected to the inner wall of the movable groove two 2421, and the movable portion 248 is movably sleeved on the outside of the guide rod two 249. One end of the movable portion 248 penetrates the movable groove two 2421 and extends outward to form an L-shaped extension end. A spring three 250 is sleeved on the outside of the guide rod two 249, and the two ends of the spring three 250 are respectively connected with the inner wall of the movable groove two 2421 and the movable portion 248.

[0057] By adopting the technical scheme, the screw rod two 252 can drive the seat body 241 to move inside the movable groove three 251, so that the position of the seat body 241 is adjusted, when the position of the seat body 241 changes, the position of the clamping part 242 also changes with the movement of the seat body 241, so that the position of the four clamping parts 242 can be adjusted according to the size of the pedicle screw tail cap, which can adapt to pedicle screw tail caps of different sizes, realize clamping and centering of pedicle screw tail caps of different sizes, and the movable part 248 can move inside the clamping part 242, so that the length of the clamping part 242 as a whole can be adjusted, the L-shaped extension end at the bottom of the movable part 248 is in contact with the lower end of the pedicle screw tail cap, the adaptive clamping of the pedicle screw tail cap of different lengths is realized, and the stability of the clamping and centering of the pedicle screw tail cap can be improved.

[0058] As shown in Figure 1 and Figure 11 The outer surface of the torque measuring part 12 is connected with a conductive slip ring 14, and the stator part of the conductive slip ring 14 is fixed to the outer surface of the torque measuring part 12. The outer surface of the torque measuring part 12 is rotatably connected with a sleeve 15, and the rotor part of the conductive slip ring 14 is fixed to the inner wall of the sleeve 15. The outer surface of the sleeve 15 is fixed with a display part 16 linearly connected with the rotor part.

[0059] The outer surface of the torque measuring part 12 is also connected with a gripping part 19, and one side of the gripping part 19 is fixed with a plug rod 18. One side of the sleeve 15 is fixed with a sleeve rod 17, and the plug rod 18 is movably inserted into the sleeve rod 17.

[0060] By adopting the technical scheme, in order to facilitate reading the real-time measurement value of the torque, the display part 16 of the present application is not designed in an integral manner with the torque measuring part 12. The display part 16 is fixed outside the sleeve 15, and the signal transmission between the torque measuring part 12 and the display part 16 is realized through the conductive slip ring 14. In actual use, one hand holds the handle 11, and the other hand holds the gripping part 19. When the handle 11 is rotated, the handle 11 drives the torque measuring part 12 to rotate inside the gripping part 19. Since the gripping part 19 is connected with the sleeve 15 through the plug rod 18 and the sleeve rod 17, the sleeve 15 does not rotate like the gripping part 19. Therefore, when the torque measuring part 12 is rotated to measure the torque, the display side of the display part 16 can still face the user. The display part 16 does not rotate with the torque measuring part 12, and the user can conveniently observe the torque measurement value in real time.

[0061] The working process of the technical scheme provided by the present application is as follows:

[0062] The tail cap of the pedicle screw is placed below the kit 25, the screw rod two 252 is rotated to drive the seat body 241 to move inside the movable groove three 251, the positions of the four clamping portions 242 are adjusted according to the size of the tail cap of the pedicle screw, then the movable portion 248 is grabbed by hand, the movable portion 248 inside the clamping portion 242 is stretched outwards, the length of the clamping portion 242 as a whole is lengthened, and the free end of the clamping portion 242 is rotated towards the tail cap, the L-shaped extension end at the bottom of the movable portion 248 is in contact with the lower end of the tail cap of the pedicle screw, and after the four clamping portions 242 sequentially complete the above-mentioned actions, the clamping and centering of the tail cap of the pedicle screw are completed.

[0063] Then the handle 11 is held by hand, the torque measuring portion 12 and the driving portion 13 are moved towards the tail cap of the pedicle screw through the handle 11, the connecting rod 21 fixed at one end of the driving portion 13 is inserted into the tail cap of the pedicle screw from the limiting portion 22, and the clamping portion 224 of the limiting portion 22 limits the connecting rod 21, so that the connecting rod 21 can only move in one direction towards the pedicle screw, when the hexagonal driving head at one end of the connecting rod 21 is inserted into the internal hexagon of the screw, the screw rod one 231 is rotated to drive the bearing outer ring 234 and the bearing inner ring 221 to move, when the bearing outer ring 234 and the bearing inner ring 221 move towards the pedicle screw, the clamping portion 224 of the bearing inner ring 221 limits the connecting rod 21, so that the clamping portion 224 of the bearing inner ring 221 drives the connecting rod 21 to also move towards the pedicle screw, so that the hexagonal driving head of the connecting rod 21 can tightly fit in the internal hexagon of the screw, finally one hand holds the handle 11, the other hand holds the gripping portion 19, the handle 11 is rotated to drive the connecting rod 21 to rotate through the driving portion 13, the connecting rod 21 is rotated to drive the pedicle screw to rotate, so that the pedicle screw is inserted into the bone.

[0064] In this process, the torque measuring portion 12 can measure the torque generated during the rotation of the pedicle screw, and the measured value is transmitted to the display portion 16 through the conductive slip ring 14, since the gripping portion 19 is connected with the sleeve body 15 through the insertion rod 18 and the sleeve rod 17, the sleeve body 15 does not rotate like the gripping portion 19, so that the display side of the display portion 16 can still face the user when the torque measuring portion 12 is rotated to measure the torque, the display portion 16 does not rotate with the torque measuring portion 12, and the user can conveniently observe the torque measurement value in real time.

[0065] The present application encompasses any alternatives, modifications, equivalent methods and solutions made to the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be fully understood without the description of these details to those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits, etc. are not described in detail.

[0066] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can also be made, which should be considered as the protection scope of the present application.

Claims

1. A screw implantation torque measuring device comprising a hand-held end, characterized in that The handheld end comprises a handle, a torque measurement part fixed at one end of the handle, and a driving part fixed at one end of the torque measurement part; The other end of the driving part is fixed with a stable anti-deviation assembly, and the stable anti-deviation assembly comprises a connecting rod fixed at the other end of the driving part, a limiting part sleeved outside the connecting rod, a sleeve part rotatably connected outside the limiting part, a centering assembly connected at one side of the sleeve part; The centering assembly comprises four seat bodies connected at the lower end of the sleeve part, four clamping parts rotatably connected at one side of the four seat bodies respectively, a plurality of pawls fixed on the outer surface of the four clamping parts, four rotating rods rotatably connected inside the four seat bodies respectively, limiting pawls fixed outside the rotating rods for limiting the pawls, and four knob parts rotatably connected on the outer surface of one side of the four seat bodies, and the four knob parts are fixed with the four rotating rods respectively. A plurality of clamping grooves are formed in the outer part of the connecting rod, and the limiting part comprises a bearing inner ring movably sleeved outside the connecting rod, a movable groove one formed in the inner part of the bearing inner ring, a movable seat movably connected in the movable groove one, a clamping part integrally formed at one side of the movable seat for inserting into the clamping groove and limiting the connecting rod, a guide column one inserted into the inner part of the movable seat and fixed at the other end in the inner wall of the movable groove one, a spring one sleeved outside the guide column one, a displacement inclined groove formed in the inner part of the movable seat, and a displacement assembly movably connected in the bearing inner ring and used for driving the movable seat to move, and the two ends of the spring one are connected with the inner wall of the movable groove one and one side of the movable seat respectively.

2. Screw insertion torque measuring device according to claim 1, characterized in that The four clamping parts are rotatably connected at one side of the four seat bodies through four torsion springs.

3. The screw placement torque measuring device of claim 1, wherein, The displacement assembly comprises a plurality of guide columns two movably inserted into the bearing inner ring, a spring two sleeved outside the guide columns two, a pressing plate fixed at one end of the guide columns two, and an extension part integrally formed at one side of the pressing plate, and the extension part penetrates through the bearing inner ring and enters the displacement inclined groove, one side of the extension part is provided with a slope matched with the displacement inclined groove, and the two ends of the spring two are connected with the pressing plate and one side of the bearing inner ring respectively.

4. Screw implant torque measuring device according to claim 3, characterized in that The sleeve part comprises two ring bodies and a cover body connecting the two ring bodies, and a pressing adjustment part is further connected inside the sleeve body, and the pressing adjustment part comprises a bearing outer ring rotatably connected outside the bearing inner ring and located inside the sleeve part, a guide rod one fixed inside the sleeve part, and a lead screw one screwed inside the sleeve part, the lead screw one is screwed in the bearing outer ring, one end of the lead screw one penetrates through the upper ring body and extends outward, and the bearing outer ring is movably sleeved outside the guide rod one.

5. Screw implantation torque measuring device according to claim 4, characterized in that The outer part of the bearing inner ring is rotatably connected with the inner wall of the bearing outer ring.

6. Screw implant torque measuring device according to claim 5, characterized in that One side of one of the ring bodies is provided with a movable groove three, and the seat body is slidably connected in the movable groove three, a lead screw two is rotatably connected in the movable groove three, and the seat body is screwed outside the lead screw two, and one end of the lead screw two penetrates through the ring body and extends outward.

7. Screw implant torque measuring device according to claim 6, characterized in that An active groove two is formed in the inner part of the clamping part, and an active part is movably connected in the active groove two, a guide rod two is fixed on the inner wall of the active groove two, and the active part is movably sleeved outside the guide rod two, one end of the active part penetrates through the active groove two and extends outward to form an L-shaped extension end, a spring three is sleeved outside the guide rod two, and the two ends of the spring three are connected with the inner wall of the active groove two and the active part respectively.

8. Screw insertion torque measuring device according to claim 7, characterized in that The outer surface of the torque measuring part is connected with a conductive slip ring, and the stator part of the conductive slip ring is fixed to the outer surface of the torque measuring part.

9. Screw implant torque measuring device according to claim 8, characterized in that The outer surface of the torque measuring part is connected with a conductive slip ring, and the stator part of the conductive slip ring is fixed to the outer surface of the torque measuring part.

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