LU101607B1

LU101607B1 - Surgical tool for force measurement and distance measurement

Info

Publication number: LU101607B1
Application number: LU101607A
Authority: LU
Inventors: Bing Ji; Fan Yang; Meng Si; Menglin Cong; Hecheng Ma
Original assignee: Univ Shandong
Priority date: 2019-11-25
Filing date: 2020-01-27
Publication date: 2020-05-27
Also published as: CN110882033B; CN110882033A

Abstract

The present invention discloses a surgical tool for force measurement and distance measurement, which solves the problems in the prior art that the depth of perforation is difficult to grasp and the stress is difficult to measure, can detect the depth of the surgical tool in real time, can also detect the magnitude of force on the surgical tool in real time, and can meet different types of operation needs by replacing a tool tip. According to the technical solution, the surgical tool comprises a shank, a tool bar, and a tool bit, wherein one end of the tool bar is detachably connected to the shank, and the other end of the tool bar is detachably connected to the tool bit; a transparent housing is mounted on the outside of the tool bar, and a lamp is fixed on one side of the tool bar; wherein the tool bar comprises a thrust mechanism, and the thrust mechanism is connected to a force measuring mechanism and is capable of driving the force measuring mechanism to move.

Description

SURGICAL TOOL FOR FORCE MEASUREMENT AND DISTANCE MEASUREMENT 107607 Field of the Invention The present invention relates to the technical field of medical equipment, in particular to a surgical tool for force measurement and distance measurement.

Background of the Invention In current orthopedic surgery, internal fixation of bones mainly means that a metal material is implanted into human body and then fixed by steel plates or steel nails, and the steel plates and steel : 10 nails are removed after the broken bones are healed. Before the steel nails are fixed, perforation is | required for the bones. The outer wall and inside of the bone of the same person have different strengths, and the bones of different individuals also have different strengths, so doctors are unable to achieve the accurate depth of perforation. The steel nails cannot be fixed stably in too shallow , holes such that the treatment effect is affected, and the bones may be damaged if the holes are too deep.

At present, a doctor only determines the depth of perforation by marking on a side of a tool bar of the surgical tool and then observing the mark on the tool bar. However, during surgery, the surgical | tool may be stained with blood and the scales may be worn, the scales on the surgical tool are . unreadable, which not only causes inconvenience to the surgery, but also seriously affects the accuracy of distance measurement. Therefore, the research and development of a surgical tool capable of accurately and effectively measuring the depth of perforation are urgently needed.

Bone strength is an important characteristic of patient’ bones. The level of bone strength plays an | important role in the treatment plan and prognosis evaluation of a patient. The force required for perforation is a direct and effective means to measure the bone strength. However, an apparatus for accurately measuring the perforation force still lacks at present.

Summary of the invention In order to overcome the shortcomings of the prior art, the present invention provides a surgical tool | for force measurement and distance measurement, which can detect the depth of the surgical tool in ; 30 real time, can also detect the magnitude of force on the surgical tool in real time, and can meet EE aedifferent types of operation needs by replacing a tool tip. lu101607 The present invention adopts the following technical solution: . À surgical tool for force measurement and distance measurement, including a shank, a tool bar, and a tool bit, wherein one end of the tool bar is detachably connected to the shank, and the other end of the tool bar is detachably connected to the tool bit; a transparent housing is mounted on the outside of the tool bar, and a lamp is fixed inside the tool bar; the tool bar includes a thrust mechanism, and the thrust mechanism is connected to a force measuring mechanism and is capable of driving the force measuring mechanism to move.

Further, the force measuring mechanism includes a connector connected to the thrust mechanism, a support frame fixed to the connector, and an elastic mechanism mounted inside the support frame; and a strain gauge is fixed on a side of the support frame.

Further, the thrust mechanism includes a motor, a lead screw connected to the motor, and a nut ’ sleeved on the lead screw, the nut is connected to the force measuring mechanism through a distance measuring module, and a distance measuring sensor is mounted on the distance measuring module.

Further, the elastic mechanism includes a screw, one end of the screw is fixed to the connector, a spring seat is mounted at the other end of the screw, the spring seat is connected to one end of the | spring, the other end of the spring is connected to a bracket, the bracket is connected to the support frame, and the screw penetrates the bracket.

Further, a locking sleeve is mounted on the screw.

Further, fixing devices are provided on two sides of the support frame, and the strain gauge is | mounted on the fixing devices.

Further, a wireless transmission module is fixed inside the tool bar, and force data acquired by the : strain gauge and distance data measured by the distance measuring sensor are transmitted to a display by the wireless transmission module. | 25 Further, guide rods are mounted on two sides of the lead screw, and the guide rods penetrate through the distance measuring module.

Further, a mounting groove is provided on one side of the tool bar, and the lamp is disposed in the mounting groove.

Further, the tool bar is connected to the shank and the tool bit by threads, respectively.

Further, the housing is retractable.

Compared with the prior art, the present invention has the following beneficial effects: lu101607 : (1) The present invention can measure the magnitude of force and the change of the force with the | depth of perforation in real time, observe the depth of the tool bit in real time, effectively prevent | improper depth of perforation, and achieve the purpose of protecting the patients bones and assisting in surgical treatment; | (2) The present invention can adjust the magnitude of force applied; when the strength of bones is : too high, holes cannot be formed by ordinary force, and the rotation speed of the motor is changed such that the thrust mechanism can output different force to control the force of perforation; : (3) The tool bar of the present invention has a lamp, so that an operator can see the real-time status of the patient's bones; a transparent housing is provided outside the tool bar, and the inside of the tool bar is sealed, thereby effectively preventing bacterial infection and prolonging the service life of the tool.

Brief Description of the Drawings The accompanying drawings constituting a part of the present application are used for providing a further understanding of the present application, and the schematic embodiments of the present application and the description thereof are used for interpreting the present application, rather than ; constituting improper limitation to the present application. / Fig. 1 is a schematic diagram of an overall structure according to Embodiment 1 of the present invention; Fig. 2 is a schematic diagram of an internal structure of a tool bar according to Embodiment 1 of the present invention; Fig. 3 is a schematic structural diagram of a force measuring mechanism according to Embodiment 1 of the present invention; Fig. 4 is a schematic structural diagram of a tool bar housing according to Embodiment 1 of the ’ present invention; Fig. 5 is a schematic diagram of a bottom structure of a shank according to Embodiment 1 of the present invention; ' Fig. 6 is an isometric diagram of a tool bit according to Embodiment 1 of the present invention; Fig. 7 is a schematic structural diagram of a fixed plate of a thrust mechanism according to

/ 4 Embodiment 1 of the present invention; u101607 Fig. 8 is an internal isometric diagram of the tool bar according to Embodiment 1 of the present invention; In which, 1-shank, 1-a power supply battery, 1-b battery baffle, 1-c motor fixing slot, 2-tool bar | 5 housing, 3-tool bit, 4-a driving motor, 4-b lead screw, 4-c screw nut, 5-force measuring mechanism, / 6-lamp, 7-wireless transmission module, 8-distance measuring module, 9-connector, 10-support frame, 11-fixing device, 12-strain gauge, 13-locking sleeve, 14-screw, 15-bracket, 16-spring, 17-pilot hole, 18-thread, 19-mounting groove, 20-tool bit moving zone, 21-fixed plate, 22-guide rod, 23-screw hole.

| 10 É Detailed Description of Embodiments It should be pointed out that the following detailed descriptions are all exemplary and aim to further illustrate the present application. Unless otherwise specified, all technical and scientific terms used in | the descriptions have the same meanings generally understood by those of ordinary skill in the art of the present application.

It should be noted that the terms used herein are merely for describing specific embodiments, but are not intended to limit exemplary embodiments according to the present application. As used ; herein, unless otherwise explicitly pointed out by the context, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms “include” : 20 and/or “comprise” are used in the description, they indicate features, steps, operations, devices, components and/or their combination.

For the sake of description, the terms “upper”, “lower”, “left”, and “right” in the present application | only indicate the upper, lower, left, and right directions of the drawings, do not limit the structure, — , are only for the convenience of description and the simplification of description, do not indicate or imply that the devices or elements must have specific directions or be constructed and operated in specific directions, and therefore cannot be understood as limitations to the present application.

Interpretation of terms: the terms “installed”, “linked”, “connected”, “fixed” and the like in the | present application should be generally understood, for example, the “connected” may be fixedly connected, detachably connected, integrated, directly connected, indirectly connected by a medium, internally connected between two elements, or interact between two elements, and the specific

EE ETmeanings of the terms in the present invention may be understood by those of ordinary skill in thd 01607 art according to specific circumstances. | The connector is a component that plays a role of connection. ; The bracket is a supporting component. . 5 As described in the background, the prior art has the problems that the depth of perforation is . difficult to grasp and the stress is difficult to measure.

In order to solve the technical problems, the present invention provides a surgical tool for force measurement and distance measurement. : Embodiment 1: The present invention will be described in detail below in combination with Fig. 1 to Fig. 8. ; 10 Specifically, the structure is as follows: This embodiment provides a surgical tool for force measurement and distance measurement, including a shank 1, a tool bar, and a tool bit 3. One end of the tool bar is detachably connected to the shank 1, and the other end of the tool bar is detachably connected to the tool bit 3 to facilitate ; the replacement of different types of tool bits 3. À transparent tool bar housing 2 is mounted on the outside of the tool bar to prevent outside air and bacteria, and the inside of the tool bar housing 2 is , vacuum-tight to effectively prevent bacteria breeding.

The tool bar housing 2 is retractable. | In this embodiment, the top of the tool bar is provided with threads.

As shown in Fig. 4 and Fig. 5, ; the top of the tool bar is provided with internal threads, the head of the shank 1 is provided with : external threads, and the tool bar is connected to the shank by threads.

A mounting groove 19 is : 20 provided on one side of the tool bar, a lamp 6 is inserted in the mounting groove 19, and a switch of / the lamp 6 is located on the outside of the housing 2. When the lamp 6 is illuminated, an operator can see the real-time status of the patient's bone.

As shown in Fig. 2 and Fig. 8, the tool bar includes a thrust mechanism and a force measuring | mechanism.

The thrust mechanism is connected to the force measuring mechanism and is capable of , 25 driving the force measuring mechanism to move.

The thrust mechanism includes a driving motor ; 4-a, a lead screw 4-b, a screw nut 4-c, guide rods 22, and a distance measuring module 8. The driving motor 4-a is connected to the lead screw 4-b, the guide rods 22 are symmetrically mounted / on two sides of the lead screw 4-b, the lead screw 4-b and the guide rods 22 penetrate through a | fixed plate 21, and the driving motor 4-a is fixed above the fixed plate 21. An output shaft of the , 30 driving motor 4-a is inserted into a center hole of the fixed plate 21, and the guide rods 22 penetrate mme Eee TT

; . pilot holes on two sides of the fixed plate 21 and are inserted into mounting holes on the surface BF91607 ; the driving motor 4-a to complete the positioning.

The screw nut 4-c is connected to the lead screw 4-b by threads, the lower part of the screw nut 4-c | is fixedly connected to the distance measuring module 8, and the driving motor 4-a drives the lead screw 4-b to rotate such that the up and down movement of the screw nut 4-c drives the distance ; measuring module 8 to move up and down.

The force can be adjusted by adjusting the rotation speed of the driving motor 4-a.

The distance measuring module 8 plays a role in connecting the thrust mechanism with the force measuring mechanism and transmitting power to the force measuring mechanism, and may be in any shape.

In order to adapt to the shape of the tool bar, the | cross section of the distance measuring module 8 in this embodiment is circular.

As shown in Fig. 3, the force measuring mechanism includes a connector 9, a support frame 10, an | elastic force mechanism, a strain gauge 12, and a distance measuring sensor mounted on the distance measuring module 8. The elastic force mechanism includes a screw 14, a spring 16, a ; bracket 15, and a spring seat 21. One end of the connector 9 is fixed to the distance measuring : 15 module 8 by screws or bolts, the other end of the connector 9 is connected to the support frame 10, the support frame 10 is used to mount the strain gauge 12, and the strain gauge 12 senses the force produced.

In this embodiment, the support frame 10 has a gantry structure, two fixing devices 11 are i respectively mounted on two sides of the support frame 10, and the strain gauge 12 is mounted : between the two fixing devices 11. In this embodiment, the fixing device 11 is a square metal sheet and has a fixing threaded hole . inside.

The fixing devices 11 are fixed to the sides of the support frame 10 by bolts, and the strain gauge 12 is stuck on the upper and lower fixing devices 11. Strain gauges of different sizes can be ) replaced by adjusting the positions of the bolts on the sides of the support frame 10. . The screw 14 is disposed inside the support frame 10, and one end of the screw 14 is connected to the connector 9. In this embodiment, the connector 9 has a threaded hole inside, and an end of the screw 14 is mounted in the threaded hole.

The other end of the screw is connected to the spring seat ’ 21 and extends out of the spring seat 21 for a certain length, and the extending portion of the screw | 14 is connected to the tool bit 3. The screw 14 penetrates through the bracket 15, and the bracket 15 is connected to the lower part of the support frame 10. One end of the spring 16 is connected to the bracket 15, and the spring 16 is placed on the bracket EE eee

, 15 to slide; the other end of the spring 16 is connected to the spring seat 21, and the spring 164301607 . sleeved outside the screw 14. When the distance measuring module 8 moves down, downward | pressure is produced on the screw 14, and the spring 16 is compressed; and when the distance measuring module 8 moves up, the spring 16 is stretched through the support frame 10 and the bracket 15.

A locking sleeve 13 is mounted on the portion of the screw 14 inside the support frame 10. The ! locking sleeve 13 prevents the screw 14 from generating oblique torque due to uneven force, and ! can also effectively prevent the screw 14 from breaking.

When force measurement is needed, since one end of the bracket 15 is fixed to the distance measuring module 8 through the support frame 10 and the other end is connected to the tool bit 3 ; through the spring 16 and the screw 14, when the tool bit 3 is stressed, the bracket 15 is deformed. The strain gauge 12 acquires data, and performs corresponding transformation to obtain real-time | force data. When the force measuring sensor senses pressure, the distance measuring module 8 . begins to measure the moving distance, and the distance data and force data obtained by ; 15 measurement are transmitted to a display by a wireless transmission module 7.

. As shown in Fig. 5, a mounting slot is provided on the head of the shank 1, the wireless / transmission module 7 is placed in the mounting slot, and information is transmitted by the wireless transmission module 7. A power supply battery 1-a is mounted at the front end of the wireless transmission module 7, a motor fixing slot 1-c is formed in front of the power supply battery 1-a, the driving motor 4-a is fixed in the motor fixing slot 1-c, and the driving motor 4-a is separated ; from the power supply battery 1-a by a battery baffle 1-b. The battery baffle 1-b is provided with a : through hole for a wire to pass through, so that the driving motor 4-a is connected to the power : supply battery 1-a by the wire.

As shown in Fig. 6, a screw hole 23 is provided in the center of the connecting end of the tool bit 3 to cooperate with the lead screw 4-b, pilot holes 17 are provided on two sides of the screw hole 23 : to cooperate with the guide rods 22, and the rotation of the lead screw 4-b can drive the tool bit 3 to move in a tool bit moving zone 20.

The surgical tool of this embodiment can accurately and conveniently measure the depth of perforation, and can also display the change in perforation force with the depth of perforation. A force measuring device and a distance measuring device are mounted inside. When the surgical tooltouches the surface of a bone, the force measuring device detects an increase in pressure, distanitd 01607 | measurement begins, and the distance measuring device collects statistics on the distance and measures the change in perforation force with the depth of perforation in real time, thereby { obtaining a relationship between the distance and strength of perforation. A method of using the surgical tool in this embodiment includes: Step (1): a power supply of the surgical tool is turned on, and the lamp 6 on the side of the tool bar is turned on, so that an operator can observe bones.

Step (2): the surgical tool is adjusted to a proper posture and aligned with the bone that needs ; surgery.

Step (3): the driving motor 4-a of the surgical tool is controlled to rotate at a uniform speed, so that the tool bit 3 advances uniformly; when the tool bit 3 senses a force, the strain gauge 12 is zeroed to ; measure the force, and the distance measuring sensor is zeroed to measure the distance; the measured data is transmitted to the display by the wireless transmission module 7. | Step (4): in the presence of a large resistance, the output torque of the driving motor 4-a is adjusted, so that the thrust of the surgical tool increases to penetrate the bone.

Step (5): when the tool bit 3 needs to be replaced, the original tool bit 3 is removed from the bottom of the tool bar and replaced with a new too bit 3.

Described above are merely preferred embodiments of the present application, and the present application is not limited thereto. Various modifications and variations may be made to the present : 20 application for those skilled in the art. Any modification, equivalent substitution, improvement or the like made within the spirit and principle of the present application shall fall into the protection scope of the present application.

Claims

Claims lu101607 |

1. À surgical tool for force measurement and distance measurement, comprising a shank, a tool bar, | and a tool bit, wherein one end of the tool bar is detachably connected to the shank, and the other | end of the tool bar is detachably connected to the tool bit; a transparent housing is mounted on the | outside of the tool bar, and a lamp is fixed inside the tool bar; | wherein the tool bar comprises a thrust mechanism, and the thrust mechanism is connected to a | force measuring mechanism and is capable of driving the force measuring mechanism to move. |

2. The surgical tool for force measurement and distance measurement according to claim 1, wherein | the force measuring mechanism comprises a connector connected to the thrust mechanism, a | support frame fixed to the connector, and an elastic mechanism mounted inside the support frame; and a strain gauge is fixed on a side of the support frame.

3. The surgical tool for force measurement and distance measurement according to claim 1, wherein the thrust mechanism comprises a motor, a lead screw connected to the motor, and a nut sleeved on | the lead screw, the nut is connected to the force measuring mechanism through a distance measuring / module, and a distance measuring sensor is mounted on the distance measuring module.

4. The surgical tool for force measurement and distance measurement according to claim 2, wherein | the elastic mechanism comprises a screw, one end of the screw is fixed to the connector, a spring / seat is mounted at the other end of the screw, the spring seat is connected to one end of the spring, | the other end of the spring is connected to a bracket, the bracket is connected to the support frame, | and the screw penetrates the bracket. j

5. The surgical tool for force measurement and distance measurement according to claim 4, wherein | a locking sleeve is mounted on the screw.

6. The surgical tool for force measurement and distance measurement according to claim 2, wherein / fixing devices are provided on two sides of the support frame, and the strain gauge is mounted on the fixing devices. |

7. The surgical tool for force measurement and distance measurement according to claim 2 or 3, | wherein a wireless transmission module is fixed inside the tool bar, and force data acquired by the ) strain gauge and distance data measured by the distance measuring sensor are transmitted to a :

10 | display by the wireless transmission module. 4101607 |

8. The surgical tool for force measurement and distance measurement according to claim 3, wherein | guide rods are mounted on two sides of the lead screw, and the guide rods penetrate through the | distance measuring module. |

9, The surgical tool for force measurement and distance measurement according to claim 1, wherein | a mounting groove is provided on one side of the tool bar, and the lamp is disposed in the mounting | groove. |

10. The surgical tool for force measurement and distance measurement according to claim 1, | wherein the tool bar is connected to the shank and the tool bit by threads, respectively. |