An arthroscopic device

Abstract

The present invention belongs to the technical field of medical instruments, and specifically is an arthroscopic device, comprising a handle, on which a mounting rod and a mirror rod are sequentially mounted, and a detection lens is mounted in the mirror rod; a fixing plate is mounted in the mirror rod, and an adjustment plate and a detection lens are mounted on the fixing plate via an elastic rod; a top seat is mounted on a slide groove on the fixing plate, and an elastic layer is mounted on the top seat, and the elastic layer is in contact with the adjustment plate; a first knob is mounted on the mounting rod, and the first knob drives the top seat to move via a traction rope; a second knob is mounted on the mounting rod, and the second knob drives the piston to move in a closed cylinder; the present invention has a simple structure, and the adjustment of the inclination angle and inclination direction of the adjustment plate, in conjunction with a transparent isolation tube, enables the detection lens to have an approximately spherical viewing angle range except for the axial direction toward the mirror rod, so that the doctor can fully observe the joint cavity from different observation angles and different observation perspectives.

Description

Technical Field

[0001] The invention belongs to the technical field of medical instruments, in particular to an arthroscopic device. Background Art

[0002] Arthroscopy, as a medical device for observing the internal structure of joints, is extremely important for the treatment of joint diseases. It plays a role in the diagnosis and treatment of minimally invasive surgery on joints, and plays a huge role in the early detection and timely treatment of joint lesions.

[0003] Among the arthroscopy that is widely used at present, the observation angle of the arthroscope is fixed, and the observation range is also fixed. When used in the narrow space of the joint, it is also limited to a certain extent. Sometimes the doctor needs to change the arthroscope with a different perspective to complete the operation, which affects the progress of the operation, causes more pain to the patient, and increases the doctor's labor intensity and infection risk during the operation. Summary of the invention

[0004] In order to make up for the shortcomings of the prior art, by adjusting the inclination angle and inclination direction of the adjustment plate and cooperating with the function of the transparent isolation tube, the detection lens in the arthroscope can have an approximately spherical viewing angle range except for the axial direction of the mirror rod, so that the doctor can fully observe the joint cavity from different observation angles and different observation perspectives, reduce the doctor's labor intensity during surgery, and avoid affecting the progress of the operation. The present invention proposes an arthroscopic device.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: an arthroscopic device according to the present invention comprises a handle, a mounting rod is mounted on the handle, a mirror rod is mounted on the mounting rod, a detection lens is mounted on the end of the mirror rod away from the handle, a transparent plate is mounted on the end of the mirror rod where the detection lens is mounted, the transparent plate seals the end of the mirror rod where the detection lens is located, the electrical signal of the detection lens is transmitted to a circuit board in the handle through a cable, and the electrical signal on the circuit board is transmitted to the outside through the cable at the end of the handle for display;

[0006] The mirror rod is mounted with a fixing plate through a bracket, an elastic rod is mounted in the middle of the fixing plate, an adjustment plate is mounted on the elastic rod, and a detection lens is mounted on the adjustment plate;

[0007] The fixing plate is provided with a slide groove, a slider is slidably installed in the slide groove, a top seat is installed on the slider, an elastic layer is installed on the top seat, a cavity is provided in the elastic layer, and the upper surface of the elastic layer contacts the edge area of ​​the lower surface of the adjustment plate;

[0008] A first knob is installed on the mounting rod, a driving wheel is installed on the straight rod on the first knob, a traction rope is installed in the slide slot, the traction rope drives the slider to move in the slide slot, the traction rope passes through a through hole on the bottom surface of the slide slot, and the other end of the traction rope is connected to the driving wheel, a pressure wheel is installed in the mounting rod, and the traction rope passes between the pressure wheel and the driving wheel;

[0009] A second knob is mounted on the mounting rod, a closed cylinder is mounted in the mounting rod, a piston is mounted in the closed cylinder, the piston is rotationally connected to the straight rod on the second knob, and the spaces in the closed cylinder, the mounting rod and the mirror rod are interconnected.

[0010] Preferably, an isolation tube is installed at the end of the mirror rod, the cross section of the bottom surface of the isolation tube away from one end of the mirror rod is U-shaped, and the isolation tube is made of a transparent material, and the isolation tube acts as a transparent plate;

[0011] The fixing plate, the adjusting plate, the sliding block, the top seat and the elastic layer constitute an adjusting mechanism, and the adjusting mechanism is located in the isolation tube.

[0012] Preferably, a reflective layer is provided on the inner wall of the isolation tube and the upper surface of the adjustment plate, and the reflective layer on the isolation tube is located below the adjustment plate.

[0013] Preferably, a wear-resistant coating is provided on the surface of the elastic layer, and the lower surface of the adjustment plate is polished.

[0014] Preferably, the elastic rod comprises at least two thin metal rods, and the thin metal rods are close to each other.

[0015] Preferably, a bushing is installed in the through hole on the bottom surface of the slide groove, the bushing is rotatably installed in the through hole, the traction rope passes through the bushing, and the hardness of the bushing is greater than the hardness of the traction rope;

[0016] The upper surface of the bushing is higher than the bottom surface of the slide groove, and the edge of one end of the bushing located in the slide groove is rounded. An angle is formed between the bushing, the center line of the through hole and the bottom surface of the slide groove.

[0017] Preferably, the bushing is filled with elastic cotton, and lubricant is present in the elastic cotton.

[0018] Preferably, a rubber layer is provided on the surface of the driving wheel and the pressure wheel, and the surface of the rubber layer is roughened.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. An arthroscopic device described in the present invention comprises a fixing plate, an elastic rod, an adjusting plate, a top seat, an elastic layer, a cavity, a second knob, a piston and a closing cylinder, and utilizes the piston and the closing cylinder to evacuate air from the internal space of the arthroscope, so that the internal space of the arthroscope is in a negative pressure state, the elastic layer is expanded, and the adjusting plate is lifted and squeezed, so that the adjusting plate is tilted, thereby changing the viewing angle direction and observation range of the detection lens. At the same time, by changing the movement distance of the piston and adjusting the expansion height of the elastic layer, the inclination angle of the adjusting plate is adjusted, so that the viewing angle direction of the detection lens has a larger change range, thereby facilitating the doctor to fully observe the joint cavity and avoiding the need for the doctor to replace the arthroscope with a different viewing angle for observation.

[0021] 2. The arthroscopic device described in the present invention is provided with a fixing plate, an elastic rod, a slide groove, a slider, a top seat, an elastic layer, a cavity, a first knob, a driving wheel and a traction rope. After the elastic layer expands and lifts up the adjustment plate, the traction rope is used to drive the slider, the top seat and the elastic layer to move along the slide groove, thereby changing the inclination direction of the adjustment plate, so that the viewing angle direction of the detection lens can be directed to any position around the mirror rod, further expanding the viewing angle range of the arthroscope, making it convenient for doctors to fully observe the joint cavity, and avoiding the need for doctors to change arthroscopes with different viewing angles for observation, diagnosis and treatment.

[0022] 3. The arthroscopic device described in the present invention, by setting a bushing, elastic cotton, and a traction rope, utilizes the angle between the center line of the bushing and the bottom surface of the slide groove, which will generate a small circumferential force on the bushing when the traction rope moves, thereby causing the bushing to rotate slowly, thereby avoiding local wear of the bushing. At the same time, by utilizing the greater hardness of the bushing and the lubricant in the elastic cotton, the friction between the bushing and the traction rope is further reduced, thereby extending the service life of both. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 is a front view of the arthroscopic device of the present invention;

[0025] Figure 2 is a cross-sectional view of the arthroscopic device of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the fixing plate and the adjusting plate in the arthroscopic device of the present invention;

[0027] Figure 4 It is a schematic structural diagram of an isolation tube in the arthroscopic device of the present invention;

[0028] Figure 5 yes Figure 2 A partial enlarged view of the middle part;

[0029] Figure 6 yes Figure 2 A partial enlarged view of point B in the middle;

[0030] Figure 7 yes Figure 3 A partial enlarged view of point C in the middle;

[0031] In the figure: handle 1, mounting rod 2, first knob 21, driving wheel 22, pressure wheel 23, second knob 24, closing cylinder 25, piston 26, mirror rod 3, isolation tube 31, reflecting layer 32, fixing plate 4, bracket 41, slide groove 42, top seat 43, slider 431, elastic layer 432, traction rope 44, bushing 45, elastic cotton 451, adjustment plate 5, elastic rod 51, mounting plate 52, detection lens 521, LED light source 522, cable 53. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] like Figures 1 to 7 As shown, an arthroscopic device of the present invention comprises a handle 1, a mounting rod 2 is mounted on the handle 1, a mirror rod 3 is mounted on the mounting rod 2, a detection lens 521 is mounted on the end of the mirror rod 3 away from the handle 1, a transparent plate is mounted on the end of the mirror rod 3 where the detection lens 521 is mounted, the transparent plate seals the end of the mirror rod 3 where the detection lens 521 is located, the electrical signal of the detection lens 521 is transmitted to the circuit board in the handle 1 through the cable 53, and the electrical signal on the circuit board is transmitted to the outside through the cable at the end of the handle 1 for display;

[0034] The mirror rod 3 is mounted with a fixing plate 4 through a bracket 41, an elastic rod 51 is mounted in the middle of the fixing plate 4, an adjustment plate 5 is mounted on the elastic rod 51, and a detection lens 521 is mounted on the adjustment plate 5;

[0035] The fixing plate 4 is provided with a slide groove 42, a slider 431 is slidably installed in the slide groove 42, a top seat 43 is installed on the slider 431, an elastic layer 432 is installed on the top seat 43, a cavity is provided in the elastic layer 432, and the upper surface of the elastic layer 432 is in contact with the edge area of ​​the lower surface of the adjustment plate 5;

[0036] The mounting rod 2 is provided with a first knob 21, a driving wheel 22 is provided on a straight rod on the first knob 21, a traction rope 44 is provided in the slide groove 42, the traction rope 44 drives the slider 431 to move in the slide groove 42, the traction rope 44 passes through a through hole on the bottom surface of the slide groove 42, and the other end of the traction rope 44 is connected to the driving wheel 22, a pressure wheel 23 is provided in the mounting rod 2, and the traction rope 44 passes between the pressure wheel 23 and the driving wheel 22;

[0037] The mounting rod 2 is provided with a second knob 24, the mounting rod 2 is provided with a closed cylinder 25, the closed cylinder 25 is provided with a piston 26, the piston 26 is rotatably connected to the straight rod on the second knob 24, and the spaces within the closed cylinder 25, the mounting rod 2 and the mirror rod 3 are interconnected;

[0038] When working, the doctor grasps the handle 1 on the arthroscope, inserts the scope rod 3 on the arthroscope into the joint cavity, and observes the tissue in the joint cavity through the detection lens 521 at the end of the scope rod 3, so that the doctor can make a diagnosis and treatment according to the observed situation;

[0039] Meanwhile, the detection lens 521 is a CMOS lens or a CCD lens, and an LED light source 522 is synchronously integrated and installed on the circuit board on which the detection lens 521 is installed;

[0040] At the same time, during the observation of the joint cavity, in the initial state, the pressure in the space inside the mounting rod 2 and the mirror rod 3 is the same as that in the outside world, and the adjustment plate 5 is not squeezed by the elastic layer 432. At this time, the observation direction of the detection lens 521 is the axial direction of the mirror rod 3, and the viewing angle of the detection lens 521 is relatively fixed. At the same time, when it is necessary to change the observation angle, the pressure inside the mounting rod 2 and the mirror rod 3 is reduced, so that the pressure inside the hollow cavity of the elastic layer 432 is relatively large, causing the elastic layer 432 to expand, so that one side of the adjustment plate 5 is lifted up and the adjustment plate 5 is tilted. At the same time, the top seat 43 is driven to move by the traction rope 44 to change the tilt direction of the adjustment plate 5, thereby changing the observation direction and viewing angle range of the detection lens 521:

[0041] That is, in the first step, the doctor manually turns the second knob 24, so that the second knob 24 drives the straight rod thereon to move under the action of the thread, and then the piston 26 moves in the closed cylinder 25 in the direction away from the mounting rod 2, and the air inside the mounting rod 2 is sucked into the closed cylinder 25, so that the internal space of the mounting rod 2 and the mirror rod 3 is in a negative pressure state, so that the pressure in the cavity of the elastic layer 432 is larger than the pressure in the space inside the mounting rod 2 and the mirror rod 3, so that the elastic layer 432 expands, thereby lifting and squeezing the adjustment plate 5;

[0042] At the same time, since the adjustment plate 5 is mounted on the fixed plate 4 via the elastic rod 51 in the middle, when one side of the adjustment plate 5 is lifted up by the expanded elastic layer 432, the adjustment plate 5 is tilted, so that an angle is formed between the observation direction of the detection lens 521 and the axial direction of the mirror rod 3, and the viewing angle of the detection lens 521 is changed, so that different parts of the joint cavity can be observed;

[0043] At the same time, the doctor changes the number of turns of the second knob 24 to change the moving distance of the piston 26 in the sealing cylinder 25, so that the negative pressure in the space of the mounting rod 2 and the mirror rod 3 changes, thereby adjusting the expansion size of the elastic layer 432 and changing the tilt angle of the adjustment plate 5, so that the observation range of the detection lens 521 is larger;

[0044] At the same time, because the spaces inside the mounting rod 2 and the mirror rod 3 are relatively sealed from the outside, the piston 26 can reduce the pressure inside the spaces inside the mounting rod 2 and the mirror rod 3 when it moves inside the sealing cylinder 25, so that the elastic layer 432 expands and the adjustment plate 5 tilts, thereby changing the viewing angle of the detection lens 521. Therefore, before using the arthroscope, the doctor can judge the sealing condition of the internal space of the arthroscope by adjusting the viewing angle of the detection lens 521: when the detection lens 521 can change the viewing angle quickly and sensitively, the internal space of the arthroscope is well sealed and the arthroscope can be used normally; when the detection lens 521 cannot change the viewing angle quickly and sensitively or the viewing angle of the detection lens 521 cannot be adjusted, the sealing property of the internal space of the arthroscope is poor or the sealing fails, and liquid is likely to invade the interior of the arthroscope when it is used, resulting in the possibility of damage to the arthroscope.

[0045] Step 2: The doctor manually turns the first knob 21, and the straight rod on the first knob 21 drives the driving wheel 22 to rotate, and then drives the traction rope 44 to move through the driving wheel 22. At the same time, since the end of the traction rope 44 away from the driving wheel 22 is located in the slide groove 42, and the slider 431 is fixed on the traction rope 44, when the traction rope 44 moves, it will drive the slider 431 to move in the slide groove 42, so that the top seat 43 and the elastic layer 432 move in the circumferential direction. Under this condition, when the elastic layer 432 expands under negative pressure, the tilt direction of the adjustment plate 5 is changed with the movement of the top seat 43, so that the adjustment plate 5 can be tilted toward any point in the circumferential direction, thereby changing the observation direction and viewing angle direction of the detection lens 521, which is convenient for observing the tissue conditions in the joint cavity and convenient for doctors to make diagnosis and treatment;

[0046] In summary, by adjusting the tilt angle and tilt direction of the adjustment plate 5, the doctor can have more and more comprehensive perspectives to observe the tissues in the joint cavity, which is convenient for the doctor to make diagnosis and treatment according to the observation situation. The doctor does not need to change the arthroscope with different perspectives to fully and comprehensively observe and operate the joint cavity, thus avoiding affecting the progress of the operation and increasing the patient's pain, and reducing the doctor's labor intensity during the operation.

[0047] As an embodiment of the present invention, an isolation tube 31 is installed at the end of the mirror rod 3, and the cross-section of the bottom surface of the isolation tube 31 away from the end of the mirror rod 3 is U-shaped. The isolation tube 31 is made of a transparent material and acts as a transparent plate.

[0048] The fixing plate 4, the adjusting plate 5, the slider 431, the top seat 43 and the elastic layer 432 constitute an adjusting mechanism, and the adjusting mechanism is located in the isolation tube 31;

[0049] An isolation tube 31 is installed at the end of the mirror rod 3, and the transparent isolation tube 31 is used as a transparent plate at the end of the mirror rod 3, so as to increase the contact area between the isolation tube 31 and the mirror rod 3, facilitate the connection and sealing between the isolation tube 31 and the mirror rod 3, and avoid the relatively small contact area between the transparent plate and the mirror rod 3 when using a transparent plate, and the relatively high difficulty of sealing between the transparent plate and the mirror rod 3;

[0050] At the same time, since the adjustment mechanism is located in the isolation tube 31 and the isolation tube 31 is made of transparent material, there is no obstruction to the detection lens 521 in the remaining approximately spherical space except the axial direction toward the mirror rod 3. Therefore, when the inclination angle of the adjustment plate 5 is changed, the inclination angle of the adjustment plate 5 can be relatively larger, which further enables the detection lens 521 to observe a wider viewing angle range, and avoids the situation where the viewing angle range of the detection lens 521 is blocked by the mirror rod 3 itself when the inclination angle of the adjustment plate 5 is relatively large when using a transparent plate, thereby affecting the doctor's observation effect of different directions in the joint cavity.

[0051] As an embodiment of the present invention, a reflective layer 32 is provided on the inner wall of the isolation tube 31 and the upper surface of the adjustment plate 5, and the reflective layer 32 on the isolation tube 31 is located below the adjustment plate 5;

[0052] By setting the reflective layer 32, after the light emitted by the LED light source 522 irradiates the joint cavity, the light reflected and scattered back from the surface of the tissue in the joint cavity is concentrated and reflected, so that the brightness in the joint cavity is relatively improved, which is convenient for the doctor to observe the inside of the joint cavity. At the same time, the reflective layer 32 set on the upper surface of the adjustment plate 5 will gather and focus the light emitted by the LED light source 522, so that the light emitted by the LED light source 522 can be relatively concentrated in the viewing direction of the detection lens 521, thereby improving the brightness in the observation direction of the detection lens 521 in the joint cavity, improving the imaging effect of the arthroscope in the joint cavity, making it convenient for the doctor to distinguish the situation in the joint cavity, and facilitating the doctor to make a diagnosis and treatment.

[0053] As an embodiment of the present invention, a wear-resistant coating is provided on the surface of the elastic layer 432, and the lower surface of the adjustment plate 5 is polished;

[0054] By providing a wear-resistant coating on the surface of the elastic layer 432, the wear resistance of the elastic layer 432 is improved, and the elastic layer 432 is prevented from being excessively worn and damaged during long-term use, which affects the normal use of the elastic layer 432. At the same time, after the lower surface of the adjustment plate 5 is polished, the lower surface of the adjustment plate 5 is relatively smooth and the friction coefficient is relatively small. Combined with the wear-resistant coating provided on the surface of the elastic layer 432, when the top seat 43 drives the elastic layer 432 to move, the friction between the elastic layer 432 and the adjustment plate 5 is relatively small, which can reduce the wear between the elastic layer 432 and the adjustment plate 5 and extend the service life of both. At the same time, it can also ensure that when the doctor turns the first knob 21, the traction rope 44 can easily and smoothly drive the slider 431, the top seat 43 and the elastic layer 432 to move along the slide groove 42, thereby avoiding excessive friction between the elastic layer 432 and the adjustment plate 5, resulting in jamming and jamming, which affects the normal use of the arthroscope.

[0055] As an embodiment of the present invention, the elastic rod 51 includes at least two thin metal rods, and the thin metal rods are close to each other;

[0056] Since the elastic rod 51 is composed of multiple thin metal rods, when one layer of the adjustment plate 5 is lifted and squeezed by the elastic layer 432, the elastic rod 51 composed of thin metal rods will bend and deform, causing the adjustment plate 5 to tilt and change the viewing angle direction of the detection lens 521, making it convenient for doctors to observe tissues in different positions in the joint cavity. At the same time, when the top seat 43 drives the elastic layer 432 to move, and the elastic layer 432 causes the adjustment plate 5 to tilt, there will be friction between the elastic layer 432 and the adjustment plate 5. At this time, the elastic rod 51 obtained by combining multiple groups of thin metal rods limits and offsets the twisting tendency of the adjustment plate 5, thereby preventing the moving elastic layer 432 from driving the adjustment plate 5 to rotate, deflect or twist, affecting the stability of the viewing angle of the detection lens 521 in the joint cavity, and affecting the normal use of the arthroscope.

[0057] As an embodiment of the present invention, a bushing 45 is installed in the through hole on the bottom surface of the slide groove 42, and the bushing 45 is rotatably installed in the through hole. The traction rope 44 passes through the bushing 45, and the hardness of the bushing 45 is greater than the hardness of the traction rope 44;

[0058] The upper surface of the bushing 45 is higher than the bottom surface of the slide groove 42. The edge of one end of the bushing 45 located in the slide groove 42 is rounded. There is an angle between the bushing 45, the center line of the through hole and the bottom surface of the slide groove 42.

[0059] Since the traction rope 44 moves under the action of the first knob 21 and the driving wheel 22, the slider 431 is driven to move in the slide groove 42. During this process, the traction rope 44 passes through the through hole on the bottom surface of the slide groove 42 and changes the movement direction of the traction rope 44, so that friction occurs between the traction rope 44 and the edge and inner wall of the through hole. At the same time, by installing a bushing 45 with a relatively high hardness in the through hole, the wear of the through hole is avoided or reduced when the traction rope 44 moves, and grooves are avoided on the inner wall and edge of the through hole, which affects the normal use of the fixing plate 4 and the traction rope 44.

[0060] At the same time, since the bushing 45 is rotatably installed in the through hole, when the traction rope 44 passes through the bushing 45, due to the presence of a small angle between the bushing 45 and the bottom surface of the slide groove 42, the traction rope 44 contacts the edge of the bushing 45 located in the slide groove 42 and when the traction rope 44 moves, the traction rope 44 will drive the bushing 45 slightly, causing the bushing 45 to rotate slowly, thereby preventing the traction rope 44 from always contacting the same part of the bushing 45, so as to evenly distribute the possible wear on the bushing 45 and extend the service life of the bushing 45 and the traction rope 44.

[0061] As an embodiment of the present invention, the bushing 45 is filled with elastic cotton 451, and the elastic cotton 451 contains lubricant;

[0062] The traction rope 44 is restricted and constrained by the filled elastic cotton 451 to prevent the traction rope 44 from shaking during movement, which causes the relative position of the traction rope 44 in the bushing 45 to change, affecting the driving of the slider 431, and further affecting the adjustment of the inclination angle of the adjustment plate 5 and the viewing direction of the detection lens 521. At the same time, a layer of lubricant is attached to the surface of the traction rope 44 by soaking or embedding it in the elastic cotton 451, so that when the traction rope 44 passes through the bushing 45, the friction between the traction rope 44 and the bushing 45 is further reduced, thereby extending the service life of both.

[0063] As an embodiment of the present invention, a rubber layer is provided on the surface of the driving wheel 22 and the pressure wheel 23, and the surface of the rubber layer is roughened;

[0064] By providing a rubber layer and utilizing the elasticity of the rubber layer, the pressure wheel 23 can squeeze and press the traction rope 44 passing through the surface of the driving wheel 22, thereby increasing the friction between the traction rope 44 and the driving wheel 22, ensuring that the driving wheel 22 can smoothly drive the traction rope 44 to move, and avoiding the traction rope 44 from slipping at the driving wheel 22, which would affect the adjustment of the inclination direction of the adjustment plate 5. At the same time, by providing a rubber layer, the pressure wheel 23 can press the traction rope 44 against the driving wheel 22, ensuring that the relative position of the traction rope 44 on the driving wheel 22 is stable when the traction rope 44 moves, thereby avoiding the traction rope 44 from being skewed or falling off from the driving wheel 22, thereby ensuring the normal use of the arthroscope.

[0065] The specific workflow is as follows:

[0066] During operation, the doctor grasps the handle 1 on the arthroscope, inserts the scope rod 3 on the arthroscope into the joint cavity, and observes the tissue in the joint cavity through the detection lens 521 at the end of the scope rod 3.

[0067] At the same time, during the observation of the joint cavity, in the initial state, the pressure in the space inside the mounting rod 2 and the mirror rod 3 is the same as that in the outside world, and the adjustment plate 5 is not squeezed by the elastic layer 432. At this time, the observation direction of the detection lens 521 is the axial direction of the mirror rod 3, and the viewing angle of the detection lens 521 is relatively fixed. At the same time, when it is necessary to change the observation angle, the pressure inside the mounting rod 2 and the mirror rod 3 is reduced, so that the pressure inside the hollow cavity of the elastic layer 432 is relatively large, causing the elastic layer 432 to expand, so that one side of the adjustment plate 5 is lifted up and the adjustment plate 5 is tilted. At the same time, the top seat 43 is driven to move by the traction rope 44 to change the tilt direction of the adjustment plate 5, thereby changing the observation direction and viewing angle range of the detection lens 521:

[0068] That is, in the first step, the doctor manually turns the second knob 24, so that the second knob 24 drives the straight rod thereon to move under the action of the thread, and then the piston 26 moves in the closed cylinder 25 in the direction away from the mounting rod 2, and the air inside the mounting rod 2 is sucked into the closed cylinder 25, so that the internal space of the mounting rod 2 and the mirror rod 3 is in a negative pressure state, so that the pressure in the cavity of the elastic layer 432 is larger than the pressure in the space inside the mounting rod 2 and the mirror rod 3, so that the elastic layer 432 expands, thereby lifting and squeezing the adjustment plate 5;

[0069] At the same time, since the adjustment plate 5 is mounted on the fixed plate 4 via the elastic rod 51 in the middle, when one side of the adjustment plate 5 is lifted up by the expanded elastic layer 432, the adjustment plate 5 is tilted, so that an angle is formed between the observation direction of the detection lens 521 and the axial direction of the mirror rod 3, and the viewing angle of the detection lens 521 is changed, so that different parts of the joint cavity can be observed;

[0070] At the same time, the doctor changes the number of turns of the second knob 24 to change the moving distance of the piston 26 in the sealing cylinder 25, so that the negative pressure in the space of the mounting rod 2 and the mirror rod 3 changes, thereby adjusting the expansion size of the elastic layer 432 and changing the tilt angle of the adjustment plate 5, so that the observation range of the detection lens 521 is larger;

[0071] At the same time, because the spaces inside the mounting rod 2 and the mirror rod 3 are relatively sealed from the outside, the piston 26 can reduce the pressure inside the spaces inside the mounting rod 2 and the mirror rod 3 when it moves inside the sealing cylinder 25, so that the elastic layer 432 expands and the adjustment plate 5 tilts, thereby changing the viewing angle of the detection lens 521. Therefore, before using the arthroscope, the doctor can judge the sealing condition of the internal space of the arthroscope by adjusting the viewing angle of the detection lens 521: when the detection lens 521 can change the viewing angle quickly and sensitively, the internal space of the arthroscope is well sealed and the arthroscope can be used normally; when the detection lens 521 cannot change the viewing angle quickly and sensitively or the viewing angle of the detection lens 521 cannot be adjusted, the sealing property of the internal space of the arthroscope is poor or the sealing fails, and liquid is likely to invade the interior of the arthroscope when it is used, resulting in the possibility of damage to the arthroscope.

[0072] Step 2: The doctor manually turns the first knob 21, and the straight rod on the first knob 21 drives the driving wheel 22 to rotate, and then drives the traction rope 44 to move through the driving wheel 22. At the same time, since the end of the traction rope 44 away from the driving wheel 22 is located in the slide groove 42, and the slider 431 is fixed on the traction rope 44, when the traction rope 44 moves, it will drive the slider 431 to move in the slide groove 42, so that the top seat 43 and the elastic layer 432 move in the circumferential direction. Under this condition, when the elastic layer 432 expands under negative pressure, the tilt direction of the adjustment plate 5 is changed with the movement of the top seat 43, so that the adjustment plate 5 can be tilted toward any point in the circumferential direction, thereby changing the observation direction and viewing angle direction of the detection lens 521;

[0073] In summary, by adjusting the tilt angle and tilt direction of the adjustment plate 5 , the doctor can have more and more comprehensive perspectives to observe the tissues in the joint cavity;

[0074] An isolation tube 31 is installed at the end of the mirror rod 3, and the transparent isolation tube 31 is used as a transparent plate at the end of the mirror rod 3 to increase the contact area between the isolation tube 31 and the mirror rod 3, thereby facilitating the connection and sealing between the isolation tube 31 and the mirror rod 3;

[0075] At the same time, since the adjustment mechanism is located in the isolation tube 31 and the isolation tube 31 is made of a transparent material, there is no shielding of the detection lens 521 in the remaining approximately spherical space except the axial direction toward the mirror rod 3, so when the inclination angle of the adjustment plate 5 is changed, the inclination angle of the adjustment plate 5 can be relatively larger, further making the detection lens 521 able to observe a wider viewing angle range;

[0076] By setting the reflective layer 32, after the light emitted by the LED light source 522 irradiates the joint cavity, the light reflected and scattered back from the surface of the tissue in the joint cavity is concentrated and reflected, so that the brightness in the joint cavity is relatively improved. At the same time, the reflective layer 32 set on the upper surface of the adjustment plate 5 will gather and focus the light emitted by the LED light source 522, so that the light emitted by the LED light source 522 can be relatively concentrated in the viewing direction of the detection lens 521, thereby improving the brightness of the observation direction of the detection lens 521 in the joint cavity and improving the imaging effect of the arthroscope in the joint cavity;

[0077] By providing a wear-resistant coating on the surface of the elastic layer 432, the wear resistance of the elastic layer 432 is improved. At the same time, after the lower surface of the adjustment plate 5 is polished, the lower surface of the adjustment plate 5 is relatively smooth and the friction coefficient is relatively small. In combination with the wear-resistant coating provided on the surface of the elastic layer 432, when the top seat 43 drives the elastic layer 432 to move, the friction between the elastic layer 432 and the adjustment plate 5 is relatively small.

[0078] At the same time, when the top seat 43 drives the elastic layer 432 to move, and the elastic layer 432 causes the adjustment plate 5 to tilt, there will be friction between the elastic layer 432 and the adjustment plate 5. At this time, the elastic rod 51 obtained by combining multiple groups of thin metal rods is used to limit and offset the twisting tendency of the adjustment plate 5, so as to prevent the moving elastic layer 432 from driving the adjustment plate 5 to rotate, deflect or twist.

[0079] By installing a bushing 45 with a relatively high hardness in the through hole, the wear on the through hole can be avoided or reduced when the traction rope 44 moves;

[0080] At the same time, due to a slight angle between the bushing 45 and the bottom surface of the slide groove 42, the traction rope 44 contacts the edge of the bushing 45 in the slide groove 42 and when the traction rope 44 moves, the traction rope 44 will slightly drive the bushing 45, causing the bushing 45 to rotate slowly, so as to avoid the traction rope 44 always contacting the same part of the bushing 45, so as to evenly distribute the possible wear on the bushing 45;

[0081] The traction rope 44 is restricted and restrained by the filled elastic cotton 451 to prevent the traction rope 44 from shaking during movement. At the same time, a layer of lubricant is attached to the surface of the traction rope 44 by the lubricant soaked or embedded in the elastic cotton 451, so as to further reduce the friction between the traction rope 44 and the bushing 45 when the traction rope 44 passes through the bushing 45.

[0082] By providing a rubber layer and utilizing the elasticity of the rubber layer, the pressure wheel 23 can squeeze and press the traction rope 44 passing through the surface of the driving wheel 22, thereby increasing the friction between the traction rope 44 and the driving wheel 22, and preventing the traction rope 44 from slipping at the driving wheel 22. At the same time, by providing the rubber layer, the pressure wheel 23 can press the traction rope 44 against the driving wheel 22, ensuring that the relative position of the traction rope 44 on the driving wheel 22 is stable when the traction rope 44 moves, thereby preventing the traction rope 44 from being deviated or falling off from the driving wheel 22.

[0083] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An arthroscopic device, comprising a handle (1), a mounting rod (2) being mounted on the handle (1), a mirror rod (3) being mounted on the mounting rod (2), a detection lens (521) being mounted on one end of the mirror rod (3) away from the handle (1), a transparent plate being mounted on one end of the mirror rod (3) where the detection lens (521) is mounted, the transparent plate sealing the end of the mirror rod (3) where the detection lens (521) is located, an electrical signal of the detection lens (521) being transmitted to a circuit board in the handle (1) via a cable (53), and the electrical signal on the circuit board being transmitted to the outside world via a cable at the end of the handle (1) for display; Features: The mirror rod (3) is mounted with a fixing plate (4) via a bracket (41); an elastic rod (51) is mounted in the middle of the fixing plate (4); an adjustment plate (5) is mounted on the elastic rod (51); and a detection lens (521) is mounted on the adjustment plate (5); The fixing plate (4) is provided with a slide groove (42), a slider (431) is slidably mounted in the slide groove (42), a top seat (43) is mounted on the slider (431), an elastic layer (432) is mounted on the top seat (43), a cavity is provided in the elastic layer (432), and an upper surface of the elastic layer (432) is in contact with an edge area of ​​a lower surface of the adjustment plate (5); A first knob (21) is installed on the mounting rod (2), a driving wheel (22) is installed on the straight rod on the first knob (21), a traction rope (44) is installed in the slide groove (42), the traction rope (44) drives the slider (431) to move in the slide groove (42), the traction rope (44) passes through a through hole on the bottom surface of the slide groove (42), the other end of the traction rope (44) is connected to the driving wheel (22), a pressure wheel (23) is installed in the mounting rod (2), and the traction rope (44) passes between the pressure wheel (23) and the driving wheel (22); A second knob (24) is mounted on the mounting rod (2), a closed cylinder (25) is mounted inside the mounting rod (2), a piston (26) is mounted inside the closed cylinder (25), the piston (26) is rotatably connected to a straight rod on the second knob (24), and the spaces inside the closed cylinder (25), the mounting rod (2) and the mirror rod (3) are interconnected.

2. An arthroscopic device according to claim 1, characterized in that: An isolation tube (31) is installed at the end of the mirror rod (3); the cross section of the bottom surface of the isolation tube (31) away from one end of the mirror rod (3) is U-shaped; the isolation tube (31) is made of a transparent material and acts as a transparent plate; The fixing plate (4), the adjusting plate (5), the sliding block (431), the top seat (43) and the elastic layer (432) constitute an adjusting mechanism, and the adjusting mechanism is located in the isolation tube (31).

3. An arthroscopic device according to claim 2, characterized in that: A reflective layer (32) is provided on the inner wall of the isolation tube (31) and the upper surface of the adjustment plate (5); the reflective layer (32) on the isolation tube (31) is located below the adjustment plate (5).

4. The arthroscopic device according to claim 1, characterized in that: A wear-resistant coating is provided on the surface of the elastic layer (432), and the lower surface of the adjustment plate (5) is polished.

5. An arthroscopic device according to claim 4, characterized in that: The elastic rod (51) comprises at least two thin metal rods, and the thin metal rods are close to each other.

6. The arthroscopic device according to claim 1, characterized in that: A bushing (45) is installed in the through hole on the bottom surface of the slide groove (42), the bushing (45) is rotatably installed in the through hole, the traction rope (44) passes through the bushing (45), and the hardness of the bushing (45) is greater than the hardness of the traction rope (44); The upper surface of the bushing (45) is higher than the bottom surface of the slide groove (42), and the edge of one end of the bushing (45) located in the slide groove (42) is rounded, and an angle is formed between the bushing (45), the center line of the through hole and the bottom surface of the slide groove (42).

7. An arthroscopic device according to claim 6, characterized in that: The bushing (45) is filled with elastic cotton (451), and lubricant is present in the elastic cotton (451).

8. An arthroscopic device according to claim 7, characterized in that: A rubber layer is provided on the surface of the driving wheel (22) and the pressure wheel (23), and the surface of the rubber layer is roughened.

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