Screw placement torque measuring device

Abstract

The invention provides a screw placement torque measuring device, and belongs to the field of medical equipment. Comprising a handheld end, and the handheld end comprises a grip, a torque measuring part fixedly connected to one end of the grip and a driving part fixedly connected to one end of the torque measuring part; the other end of the driving part is fixedly connected with a stable anti-deviation assembly, and the stable anti-deviation assembly comprises a connecting rod fixedly connected to the other end of the driving part, a limiting part connected to the outer portion of the connecting rod in a sleeving mode and a sleeve part rotationally connected to the outer portion of the limiting part; by arranging the centering assembly, it is ensured that the driving part can be accurately centered with the screw head of the pedicle screw, torque loss caused by angle deviation can be effectively avoided, the driving part can more directly and evenly transmit torque to the pedicle screw, it is ensured that the applied force completely acts on the screw, errors are reduced, and the working efficiency is improved. The accuracy of torque measurement is improved, the applied torque can completely act on the screw, and the mechanical loss caused by angle deviation is reduced.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and more particularly to a screw insertion torque measuring device. Background Art

[0002] In spinal surgery, the torque value when inserting the screw comes from the contact force between the screw and the bone interface. Real-time judgment of the screw insertion torque is of great significance for determining whether the screw is stable.

[0003] In order to measure the torque of the screw inserted into the bone and determine the stability of the screw insertion, the prior art CN117643496A discloses a personalized screw insertion device for the thoracic and lumbar screw channels. A torque measuring component is connected to one end of the gripping component, and the real-time torque can be measured during the screwing process. By measuring the real-time torque, the user can obtain information such as the hardness and density of the patient's bone.

[0004] Although the screw insertion device in the prior art can realize real-time measurement of torque, before inserting the pedicle screw into the bone, it is necessary to first align the driving head of the screw insertion device with the driving slot of the pedicle screw, and then manually twist the screw insertion device to drive the pedicle screw to rotate and insert it into the bone. In this process, if the contact angle between the driving head of the screw insertion device and the pedicle screw is not completely aligned, it may cause the torque application direction to shift and the angle to deviate, thereby causing uneven torque transmission, affecting the accuracy of the measurement value, and affecting the judgment of the actual screw stability and the patient's bone condition. Summary of the invention

[0005] In view of the problem that in the prior art, a pedicle screw is rotated and inserted into a bone by manually twisting a screw placement device, if the contact angle between the driving head of the screw placement device and the pedicle screw is not completely aligned, the torque application direction may be offset, resulting in an angle deviation, thereby causing uneven torque transmission. The purpose of the present invention is to provide a screw placement torque measuring device.

[0006] To solve the above problems, the present invention adopts the following technical solutions:

[0007] A screw insertion torque measuring device comprises a handheld end, wherein the handheld end comprises a handle, a torque measuring part fixedly connected to one end of the handle, and a driving part fixedly connected to one end of the torque measuring part;

[0008] The other end of the driving part is fixedly connected with a stable anti-deflection component, and the stable anti-deflection component includes a connecting rod fixedly connected to the other end of the driving part, a limiting part sleeved on the outside of the connecting rod, a set rotatably connected to the outside of the limiting part, and a centering component connected to one side of the set;

[0009] The centering component includes four base bodies connected to the lower end of the kit, four clamping parts respectively rotatably connected to one side of the four base bodies, a plurality of pawls fixedly connected to the outer surfaces of the four clamping parts, four rotating rods respectively rotatably connected to the inside of the four base bodies, limiting pawls fixedly connected to the outside of the rotating rods for limiting the pawls, and four knob parts respectively rotatably connected to the outer surface of one side of the four base bodies, and the four knob parts are respectively fixedly connected to the four rotating rods.

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

[0011] Optionally, a plurality of slots are provided on the outside of the connecting rod, and the limiting portion includes a bearing inner ring movably mounted on the outside of the connecting rod, a movable slot 1 provided inside the bearing inner ring, a movable seat movably connected to the movable slot 1, a clamping portion integrally formed on one side of the movable seat for inserting the slot and limiting the connecting rod, a guide column 1 with one end inserted into the movable seat and the other end fixed to the inner wall of the movable slot 1, a spring 1 mounted on the outside of the guide column 1, a displacement inclined slot provided inside the movable seat, a displacement component movably connected in the bearing inner ring and used to drive the movable seat to move, and the two ends of the spring 1 are respectively connected to the inner wall of the movable slot 1 and one side of the movable seat.

[0012] Optionally, the shift assembly includes a plurality of guide pillars 2 movably inserted in the inner ring of the bearing, a spring 2 mounted on the outside of the guide pillars 2, a pressure plate fixed to one end of the guide pillars 2, and an extension portion integrally formed on one side of the pressure plate, and the extension portion passes through the inner ring of the bearing and enters the shifting bevel groove, one side of the extension portion is provided with an inclined surface matching the shifting bevel groove, and the two ends of the spring 2 are respectively connected to the pressure plate and one side of the inner ring of the bearing.

[0013] Optionally, the kit includes two upper and lower ring bodies and a cover body connecting the two ring bodies, and a clamping adjustment part is also connected to the inside of the kit, and the clamping adjustment part includes a bearing outer ring rotatably connected to the outside of the bearing inner ring and located in the kit, a guide rod one fixed to the inside of the kit, and a screw rod one screwed into the inside of the kit, the screw rod one is screwed into the bearing outer ring, and one end of the screw rod one passes 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 outer portion of the bearing inner ring is rotatably connected to the inner wall of the bearing outer ring.

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

[0016] Optionally, a movable groove 2 is opened inside the clamping part, and a movable part is movably connected in the movable groove 2, a guide rod 2 is fixedly connected to the inner wall of the movable groove 2, and the movable part is movably sleeved on the outside of the guide rod 2, one end of the movable part passes through the movable groove 2 and extends outward to form an L-shaped extension end, a spring 3 is sleeved on the outside of the guide rod 2, and the two ends of the spring 3 are respectively connected to the inner wall of the movable groove 2 and the movable part.

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

[0018] Optionally, a gripping portion is sleeved on the outside of the torque measuring portion, and an insertion rod is fixedly connected to one side of the gripping portion, and a sleeve rod is fixedly connected to one side of the sleeve body, and the insertion rod is movably inserted in the sleeve rod.

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

[0020] In the above scheme, a centering component is provided, and the tail cap of the pedicle screw can be clamped by four clamping parts, ensuring that the driving part can be accurately aligned with the screw head of the pedicle screw, which can effectively avoid torque loss caused by angular deviation. The driving part can transmit the torque to the pedicle screw more directly and evenly, ensuring that the applied force acts completely on the screw, reducing errors, and improving the accuracy of torque measurement. It can also allow the applied torque to act completely on the screw, reducing mechanical losses caused by angular deviation, thereby improving the efficiency of torque transmission of the screwdriver, thus ensuring that the torque required during the screw installation process is completely effective and ensuring precise operation. At the same time, it can also reduce damage caused by uneven contact between the driving part and the driving groove in the screw head, protect the screw, extend its service life, and avoid additional damage or insertion failure.

[0021] By setting a limiting portion, the connecting rod can be limited by spring 1, the movable seat and the clamping portion, so that the connecting rod can only move in one direction toward the pedicle screw, ensuring that one end of the connecting rod is always tightly attached to the driving groove in the screw for rotation, ensuring that all applied force is directly used to rotate the screw and is not wasted in unnecessary directions, and at the same time, it can also avoid the situation where the connecting rod jumps out of the driving groove in the screw when the torque is large, thereby reducing torque measurement errors and operation interruptions caused by the connecting rod jumping out of the groove.

[0022] By providing a clamping adjustment part, by rotating the screw rod 1, the outer ring of the bearing, the inner ring of the bearing and the transmission rod are moved in the direction of the pedicle screw, the distance between the end of the transmission rod and the inner wall of the driving groove in the screw is reduced, and the end of the transmission rod is closely attached to the inner wall of the driving groove in the screw, thereby reducing the torque instability caused by dynamic fluctuations caused by unstable contact between the transmission rod and the screw, and avoiding the torque loss caused by the gap. In this way, it can be ensured that each unit of torque can effectively act on the screw, improving the torque transmission efficiency. At the same time, the force can be more evenly distributed over the entire contact area, effectively avoiding the force concentration at a certain point or a small area, reducing local stress concentration, preventing damage to the screw or tool, and making the torque transmission more direct and uniform. Through the evenly distributed contact pressure, the torque sensor can more accurately sense the change of each unit of torque, reducing the measurement error caused by uneven force distribution. This helps to improve the stability and accuracy of torque measurement and make the measurement result more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the stable anti-deflection component of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the movable groove three and the screw rod two of the present invention;

[0027] Figure 4 It is a schematic structural diagram of the limiting part and the cover body of the present invention;

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

[0029] Figure 6 It is a schematic diagram of the structure of the guide rod 1, the ring body and the outer ring of the bearing of the present invention;

[0030] Figure 7 It is a cross-sectional view of the clamping part and the movable part of the present invention;

[0031] Figure 8 For the present invention Figure 7 A schematic diagram of the structure enlargement in the middle;

[0032] Fig. 9 is a cross-sectional view of the seat body of the present invention;

[0033] Fig.10 For the present invention Fig. 9 A magnified schematic diagram of the structure at B in the middle;

[0034] Fig.11 It is a schematic diagram of the conductive slip ring structure of the present invention.

[0035] [Reference Signs]

[0036] 1. Handheld terminal; 11. Grip; 12. Torque measuring unit; 13. Driving unit; 14. Conductive slip ring; 15. Sleeve body; 16. Display unit; 17. Sleeve rod; 18. Insertion rod; 19. Grip unit; 2. Stable anti-bias assembly; 21. Connecting rod; 211. Slot; 22. Limiting unit; 221. Bearing inner ring; 222. Active slot 1; 223. Active seat; 2231. Displacement inclined slot; 224. Clamping unit; 225. Guide column 1; 226. Spring 1; 227. Press plate; 2271. Extension unit; 228 , guide column two; 229, spring two; 23, clamping adjustment part; 231, screw rod one; 232, cover body; 233, guide rod one; 234, bearing outer ring; 235, ring body; 24, centering component; 241, seat body; 242, clamping part; 2421, movable groove two; 243, knob part; 244, rotating rod; 245, limiting claw; 246, pawl; 247, torsion spring; 248, movable part; 249, guide rod two; 250, spring three; 25, kit; 251, movable groove three; 252, screw rod two.

[0037] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0038] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

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

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

[0041] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0042] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[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, wherein the handheld end 1 includes a handle 11, a torque measuring part 12 fixedly connected to one end of the handle 11, and a driving part 13 fixedly connected to one end of the torque measuring part 12.

[0044] The other end of the driving part 13 is fixedly connected with 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 driving part 13, a limiting part 22 sleeved on the outside of the connecting rod 21, a sleeve 25 rotatably connected to the outside of the limiting part 22, and a centering component 24 connected to one side of the sleeve 25.

[0045] The centering component 24 includes four seat bodies 241 connected to the lower end of the kit 25, four clamping parts 242 respectively rotatably connected to one side of the four seat bodies 241, a plurality of pawls 246 fixedly connected to the outer surfaces of the four clamping parts 242, four rotating rods 244 respectively rotatably connected to the inside of the four seat bodies 241, a limiting claw 245 fixedly connected to the outside of the rotating rod 244 for limiting the pawl 246, and four knob parts 243 respectively rotatably connected to the outer surface of one side of the four seat bodies 241, and the four knob parts 243 are respectively fixedly connected to the four rotating rods 244.

[0046] The four clamping parts 242 are rotatably connected to one side of the four base bodies 241 through four torsion springs 247 .

[0047] By adopting the above technical scheme, the tail cap of the pedicle screw is placed under the kit 25, and then the multiple clamping parts 242 are rotated, and the free end of the clamping part 242 is rotated in the direction of the tail cap. Due to the design of the limiting claw 245, the pawl 246 can be limited, so that the free end of the clamping part 242 can only rotate unidirectionally in the direction of the tail cap of the pedicle screw. In this way, the clamping part 242 can clamp the tail cap of the pedicle screw. Since the multiple clamping parts 242 clamp the tail cap of the pedicle screw in the middle, the centering component 24, the limiting part 22 and the kit 25 are positioned on the tail cap of the pedicle screw at this time. Then, the handle 11 is held by hand, and the torque measuring part 12 and the driving part 13 are moved in 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 part 13 passes through the limiting part 22 and is inserted into the tail cap of the pedicle screw. Figure 3 As shown, the hexagonal driving head at one end of the connecting rod 21 can be inserted into the hexagonal socket of the pedicle screw (a cross hole and a cross driving head can also be matched, and the matching method can adopt a variety of matching methods in the prior art, which are not limited here), and then the handle 11 is rotated to drive the torque measuring part 12, the driving part 13 and the connecting rod 21 to rotate, and the rotation of the connecting rod 21 drives the pedicle screw to rotate, so that the pedicle screw is inserted into the bone. In this process, the torque measuring part 12 can measure the torque generated during the rotation of the pedicle screw. The torque measuring part 12 is a mature prior art, and its principle is the same as that of a digital torque screwdriver. It consists of a torque sensor (the core component of the torque screwdriver, which is used to sense the applied torque value. The sensor converts the torque signal into an electrical signal), a power supply (usually a built-in rechargeable battery or a replaceable battery, which provides power for the electronic part of the torque screwdriver), and a microprocessor (responsible for processing the signal from the torque sensor and transmitting the processed data to the display screen. Other functions such as storage, alarm, peak hold, etc. can also be performed. It will not be repeated here. 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 is ensured that the driving portion 13 can be accurately aligned with the screw head of the pedicle screw, which can effectively avoid torque loss caused by angle deviation. The driving portion 13 can transmit the torque to the pedicle screw more directly and evenly, ensuring that the applied force acts completely on the screw, reducing errors, and improving the accuracy of torque measurement. It can also allow the applied torque to act completely on the screw, reducing mechanical losses caused by angle deviation, thereby improving the efficiency of torque transmission of the screwdriver, thus ensuring that the torque required during the screw installation process is completely effective, ensuring accurate operation, and at the same time reducing The damage caused by the uneven contact surface between the driving part 13 and the driving groove in the screw head is reduced, the screw is protected, its service life is extended, and additional damage or insertion failure is avoided. By rotating the knob part 243, the rotating rod 244 can be driven to rotate. When the rotating rod 244 rotates, the limiting claw 245 can be driven to rotate, so that the limiting claw 245 is separated from the pawl 246. In this way, the limitation on the pawl 246 and the clamping part 242 can be cancelled. After the limitation on the pawl 246 and the clamping part 242 is cancelled, under the action of the torsion spring 247, the free end of the clamping part 242 can be rotated in a direction away from the pedicle screw, thereby canceling the clamping and centering of the pedicle screw.

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

[0050] The displacement assembly includes a plurality of guide pillars 228 movably inserted in the bearing inner ring 221, a spring 229 sleeved on the outside of the guide pillars 228, a pressure plate 227 fixed to one end of the guide pillars 228, and an extension portion 2271 integrally formed on one side of the pressure plate 227, and the extension portion 2271 passes through the bearing inner ring 221 and enters the displacement bevel groove 2231, and one side of the extension portion 2271 is provided with an inclined surface matching the displacement bevel groove 2231, and the two ends of the spring 229 are respectively connected to the pressure plate 227 and one side of the bearing inner ring 221.

[0051] By adopting the above technical solution, when the torque measuring part 12 and the driving part 13 are moved toward the tail cap direction of the pedicle screw through the handle 11, the connecting rod 21 moves in the bearing inner ring 221. During the movement, the spring 1 226 will push the movable seat 223 to move, so that the clamping part 224 enters the clamping groove 211. Since one side of the clamping part 224 is an inclined surface, when the connecting rod 21 moves, the inner wall of the clamping groove 211 will contact one side of the inclined surface of the clamping part 224, thereby pushing the clamping part 224 out of the clamping groove 211, so that the connecting rod 21 can only move in one direction toward the pedicle screw. The spring 1 226 and the clamping part 224 can limit the connecting rod 21, so that the connecting rod 21 cannot move in the direction away from the pedicle screw, ensuring that one end of the connecting rod 21 is always tightly attached to the inner hexagon of the screw for rotation. , ensuring that all applied force is directly used to rotate the screw without being wasted in unnecessary directions. At the same time, it can also avoid the situation where the hexagonal drive head at one end of the connecting rod 21 jumps out of the inner hexagon of the screw when the torque is large, reducing the torque measurement error and operation interruption caused by the connecting rod 21 jumping out of the slot; after the measurement is completed, by pressing the pressure plate 227, the pressure plate 227 drops and squeezes the spring 229, the extension part 2271 can enter the displacement bevel groove 2231, and the inclined surface on one side of the extension part 2271 contacts the inclined surface in the displacement bevel groove 2231, thereby pushing the movable seat 223 to move in the movable groove 222 in the direction of the spring 226, and the clamping part 224 can be moved out of the clamping groove 211, so that the limit on the connecting rod 21 can be cancelled, so that the connecting rod 21 can move in the direction away from the pedicle screw.

[0052] like Figure 4 and Figure 6 As shown, the kit 25 includes two upper and lower ring bodies 235 and a cover body 232 connecting the two ring bodies 235, and a clamping adjustment part 23 is also connected to the inside of the sleeve body 15, and the clamping adjustment part 23 includes a bearing outer ring 234 rotatably connected to the outside of the bearing inner ring 221 and located in the kit 25, a guide rod 233 fixed to the inside of the kit 25, and a screw rod 231 screwed into the inside of the kit 25, the screw rod 231 is screwed into the bearing outer ring 234, and one end of the screw rod 231 passes through the upper ring body 235 and extends outward, and the bearing outer ring 234 is movably sleeved on the outside of the guide rod 233.

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

[0054] By adopting the above technical solution, although the clamping portion 224 can limit the connecting rod 21, there will still be a gap when the hexagonal driving head at one end of the connecting rod 21 is inserted into the inner hexagon of the screw. In order to avoid the torque loss caused by the gap, the outer ring 234 of the bearing and the inner ring 221 of the bearing can be driven to move by rotating the screw 231. When the outer ring 234 of the bearing and the inner ring 221 of the bearing move toward the pedicle screw, the clamping portion 224 inside the inner ring 221 of the bearing limits the connecting rod 21. Therefore, the clamping portion 224 of the inner ring 221 of the bearing will drive the connecting rod 21 to move toward the pedicle screw, so that the hexagonal driving head of the connecting rod 21 can be tightly attached to 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 hexagonal inner hexagon of the screw, reducing the torque instability caused by dynamic fluctuations caused by the unstable contact between the hexagonal driving head of the connecting rod 21 and the inner wall of the hexagonal inner hexagon of the screw, and avoiding the torque loss caused by the gap. This ensures that each unit of torque can effectively act on the screw, improving the torque transmission efficiency. At the same time, the force can be more evenly distributed over the entire contact area, effectively avoiding the concentration of force at a certain point or a small area, reducing local stress concentration, preventing damage to screws or tools, and making the torque transmission more direct and uniform. Through evenly distributed contact pressure, the torque sensor can more accurately sense the change in each unit of torque and reduce the measurement error caused by uneven force distribution. This helps to improve the stability and accuracy of torque measurement and make the measurement results more reliable.

[0055] like Figure 3 , Figure 7 and Figure 8 As shown, a movable groove three 251 is opened on one side of the ring body 235, and the seat body 241 is slidably connected in the movable groove three 251. A screw rod 252 is rotatably connected in the movable groove three 251, and the seat body 241 is screwed on the outside of the screw rod 252. One end of the screw rod 252 passes through the ring body 235 and extends outward.

[0056] A movable groove 2421 is provided inside the clamping portion 242, and a movable portion 248 is movably connected in the movable groove 2421, a guide rod 249 is fixedly connected to the inner wall of the movable groove 2421, and the movable portion 248 is movably sleeved on the outside of the guide rod 249, one end of the movable portion 248 passes through the movable groove 2421 and extends outward to form an L-shaped extension end, a spring 3 250 is sleeved on the outside of the guide rod 249, and both ends of the spring 3 250 are respectively connected to the inner wall of the movable groove 2421 and the movable portion 248.

[0057] By adopting the above technical scheme, the seat body 241 can be driven to move inside the movable groove 3 251 by rotating the screw rod 252, so that the position of the seat body 241 can be 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. This makes it convenient to adjust the positions of the four clamping parts 242 according to the size of the pedicle screw tail cap, and can adapt to pedicle screw tail caps of different sizes, thereby achieving clamping and centering of pedicle screw tail caps of different sizes. At the same time, the movable part 248 can move inside the clamping part 242, so that the overall length of the clamping part 242 can be adjusted, so that the L-shaped extension end at the bottom of the movable part 248 contacts the lower end of the pedicle screw tail cap, thereby achieving adaptive clamping of pedicle screw tail caps of different lengths, and also improving the stability of the clamping and centering of the pedicle screw tail cap.

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

[0059] The torque measuring part 12 is also sleeved with a gripping part 19 on its exterior, and an inserting rod 18 is fixedly connected to one side of the gripping part 19 . A sleeve rod 17 is fixedly connected to one side of the sleeve body 15 , and the inserting rod 18 is movably inserted into the sleeve rod 17 .

[0060] By adopting the above technical solution, in order to facilitate reading the real-time measurement value of the torque, the display part 16 of the present application does not form an integrated design with the torque measuring part 12. By fixing the display part 16 on the outside of the sleeve 15 and realizing the signal transmission between the torque measuring part 12 and the display part 16 through the conductive slip ring 14, in actual use, one hand holds the handle 11 and the other hand grasps 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 to the sleeve 15 through the insertion rod 18 and the sleeve rod 17, the sleeve 15 does not rotate like the gripping part 19. In this way, 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, and the display part 16 will not rotate with the rotation of the torque measuring part 12, which can facilitate the user to observe the torque measurement value in real time.

[0061] The workflow of the technical solution provided by the present invention is as follows:

[0062] Place the tail cap of the pedicle screw under the kit 25, rotate the screw rod 252 to drive the seat body 241 to move inside the movable groove 3 251, adjust the positions of the four clamping parts 242 according to the size of the tail cap of the pedicle screw, then grab the movable part 248 by hand, pull the movable part 248 to extend the movable part 248 located inside the clamping part 242 to the outside, so that the overall length of the clamping part 242 becomes longer, and at the same time rotate the clamping part 242, the free end of the clamping part 242 rotates toward the direction of the tail cap, and the L-shaped extension end at the bottom of the movable part 248 contacts the lower end of the tail cap of the pedicle screw. When the four clamping parts 242 complete the above actions in sequence, the clamping and centering of the tail cap of the pedicle screw is completed.

[0063] Then, hold the handle 11 by hand, and use the handle 11 to move the torque measuring part 12 and the driving part 13 toward the tail cap of the pedicle screw. The connecting rod 21 fixed at one end of the driving part 13 passes through the limiting part 22 and is inserted into the tail cap of the pedicle screw. The clamping part 224 of the limiting part 22 will limit the connecting rod 21, so that the connecting rod 21 can only move in one direction toward the pedicle screw. When the hexagonal driving head at one end of the connecting rod 21 is inserted into the inner hexagon of the screw, the screw 231 is rotated to drive the bearing outer ring 234 and the bearing inner ring 221 to move. When the bearing outer ring 2 When the bearing inner ring 221 and the bearing inner ring 221 move toward the pedicle screw, the clamping portion 224 inside the bearing inner ring 221 limits the connecting rod 21, so the clamping portion 224 of the bearing inner ring 221 will drive the connecting rod 21 to move toward the pedicle screw, so that the hexagonal driving head of the connecting rod 21 can fit tightly in the inner hexagon of the screw. Finally, hold the handle 11 with one hand and the grasping portion 19 with the other hand, rotate the handle 11 to drive the connecting rod 21 to rotate through the driving portion 13, and the rotation of the connecting rod 21 drives the pedicle screw to rotate, thereby inserting the pedicle screw into the bone.

[0064] In this process, the torque measuring part 12 can measure the torque generated during the rotation of the pedicle screw, and the measured value is transmitted to the display part 16 through the conductive slip ring 14. Since the gripping part 19 is connected to the sleeve body 15 through the insertion rod 18 and the sleeve rod 17, the sleeve body 15 does not rotate like the gripping part 19. In this way, 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, and the display part 16 will not rotate with the torque measuring part 12, which can facilitate the user to observe the torque measurement value in real time.

[0065] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0066] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A screw insertion torque measuring device, comprising a handheld end, characterized in that: The handheld end includes a handle, a torque measuring part fixedly connected to one end of the handle, and a driving part fixedly connected to one end of the torque measuring part; The other end of the driving part is fixedly connected with a stable anti-deflection component, and the stable anti-deflection component includes a connecting rod fixedly connected to the other end of the driving part, a limiting part sleeved on the outside of the connecting rod, a set rotatably connected to the outside of the limiting part, and a centering component connected to one side of the set; The centering component includes four base bodies connected to the lower end of the kit, four clamping parts respectively rotatably connected to one side of the four base bodies, a plurality of pawls fixedly connected to the outer surfaces of the four clamping parts, four rotating rods respectively rotatably connected to the inside of the four base bodies, limiting pawls fixedly connected to the outside of the rotating rods for limiting the pawls, and four knob parts respectively rotatably connected to the outer surface of one side of the four base bodies, and the four knob parts are respectively fixedly connected to the four rotating rods.

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

3. The screw insertion torque measuring device according to claim 2, characterized in that: A plurality of slots are provided on the outside of the connecting rod, and the limiting part includes a bearing inner ring movably sleeved on the outside of the connecting rod, a movable slot 1 provided inside the bearing inner ring, a movable seat movably connected to the movable slot 1, a clamping part integrally formed on one side of the movable seat for inserting the slot and limiting the connecting rod, a guide column 1 with one end inserted into the movable seat and the other end fixed to the inner wall of the movable slot 1, a spring 1 sleeved on the outside of the guide column 1, a displacement inclined slot provided inside the movable seat, a displacement component movably connected in the bearing inner ring and used for driving the movable seat to move, and the two ends of the spring 1 are respectively connected to the inner wall of the movable slot 1 and one side of the movable seat.

4. The screw insertion torque measuring device according to claim 3, characterized in that: The displacement assembly includes a plurality of guide pillars 2 movably inserted in the inner ring of the bearing, a spring 2 sleeved on the outside of the guide pillars 2, a pressure plate fixed to one end of the guide pillars 2, and an extension portion integrally formed on one side of the pressure plate, and the extension portion passes through the inner ring of the bearing and enters the displacement bevel groove, one side of the extension portion is provided with an inclined surface matching the displacement bevel groove, and the two ends of the spring 2 are respectively connected to the pressure plate and one side of the inner ring of the bearing.

5. The screw insertion torque measuring device according to claim 4, characterized in that: The kit includes two upper and lower ring bodies and a cover body connecting the two ring bodies, and a clamping adjustment part is also connected to the inside of the kit, and the clamping adjustment part includes a bearing outer ring rotatably connected to the outside of the bearing inner ring and located in the kit, a guide rod one fixed to the inside of the kit, and a screw rod one screwed to the inside of the kit, the screw rod one is screwed in the bearing outer ring, and one end of the screw rod one passes through the upper ring body and extends outward, and the bearing outer ring is movably sleeved on the outside of the guide rod one.

6. The screw insertion torque measuring device according to claim 5, characterized in that: The outer portion of the bearing inner ring is rotatably connected to the inner wall of the bearing outer ring.

7. The screw insertion torque measuring device according to claim 6, characterized in that: One side of the ring body is provided with a movable groove three, and the seat body is slidably connected in the movable groove three. The movable groove three is rotatably connected with a screw rod two, and the seat body is screwed on the outside of the screw rod two. One end of the screw rod two passes through the ring body and extends outward.

8. The screw insertion torque measuring device according to claim 7, characterized in that: A movable groove 2 is provided inside the clamping part, and a movable part is movably connected in the movable groove 2, a guide rod 2 is fixedly connected to the inner wall of the movable groove 2, and the movable part is movably sleeved on the outside of the guide rod 2, one end of the movable part passes through the movable groove 2 and extends outward to form an L-shaped extension end, a spring 3 is sleeved on the outside of the guide rod 2, and the two ends of the spring 3 are respectively connected to the inner wall of the movable groove 2 and the movable part.

9. The screw insertion torque measuring device according to claim 8, characterized in that: The outer surface of the torque measuring part is connected to a conductive slip ring, and the stator part of the conductive slip ring is fixedly connected to the outer surface of the torque measuring part. The outer surface of the torque measuring part is rotatably connected to a sleeve, and the rotor part of the conductive slip ring is fixedly connected to the inner wall of the sleeve. The outer surface of the sleeve is fixedly connected to a display part which is linearly connected to the rotor part.

10. The screw insertion torque measuring device according to claim 9, characterized in that: The torque measuring part is also sleeved with a gripping part on the outside, and an inserting 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 inserting rod is movably inserted in the sleeve rod.

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