Variable-focus endoscope

Abstract

The invention relates to the technical field of endoscopes, and provides a variable-focus endoscope which comprises a handheld shell, a ring sleeve, an endoscope tube, a lens assembly, a rotating shell, a fixing frame, a collecting assembly, an adjusting assembly and a liquid discharging assembly. The ring sleeve is fixedly installed on the handheld shell, the endoscope tube is rotatably installed in the ring sleeve, one end of the endoscope tube is located in the handheld shell, and the other end of the endoscope tube is located in the rotating shell; the lens assembly is installed at the end, away from the ring sleeve, of the lens tube, the rotating shell is fixedly installed on the lens tube, the fixing frame is fixedly installed on the handheld shell, the fixing frame is rotationally connected with the rotating shell, the collecting assembly is installed on the fixing frame, the adjusting assembly is installed on the handheld shell, and the liquid discharging assembly is installed in the lens assembly. The problem that in the prior art, due to the influence of environmental factors and the level of operators, the situation that the visual field is limited possibly occurs in the observation process through an endoscope, and clear observation is difficult is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and in particular to a variable-focus endoscope. Background Art

[0002] An endoscope is a medical imaging device used to observe various organs and tissues through the human body. It usually consists of a long, thin lens that can be inserted into different parts of the human body, such as the gastrointestinal tract, respiratory tract, urinary tract, etc., to clearly show subtle changes in structures such as tissues, blood vessels, cavities, and mucosal folds, thereby obtaining information about the internal structure and condition of the body, helping doctors to determine the nature, extent, and severity of lesions, and provide a basis for formulating appropriate diagnosis and treatment plans.

[0003] The operation process of endoscopy is relatively complicated, and doctors need to undergo rigorous training and accumulate practical experience to master it and ensure the safety of patients. Most endoscopes provide real-time images, which are affected by resolution and may affect the doctor's ability to detect some minor abnormalities. In addition, endoscopes cannot provide structural information like other imaging technologies such as X-rays, so in some cases it may be difficult to determine the scope and location of the lesion, which in turn affects the observation effect.

[0004] An inappropriate viewing angle of the endoscope may also cause blurred, distorted, and distorted images, resulting in a limited field of view, making it difficult to accurately judge the specific situation of the observation position, which greatly increases the difficulty of the operation. Summary of the invention

[0005] The present invention provides a variable-focus endoscope, which solves the problem in the related art that due to environmental factors and the operator's level, the field of view may be limited during observation using the endoscope, resulting in difficulty in observation.

[0006] The technical solution of the present invention is as follows: A variable-focus endoscope comprising: Handheld housing; A ring sleeve, the ring sleeve is fixedly mounted on the handheld housing; A mirror tube, the mirror tube is rotatably mounted inside the ring sleeve, and one end of the mirror tube is located inside the handheld housing; A lens assembly, the lens assembly being mounted on an end of the lens tube away from the ring sleeve and used for collecting images; A rotating shell, wherein the rotating shell is fixedly mounted on the mirror tube; A fixed frame, the fixed frame is fixedly mounted on the handheld housing, and the fixed frame is rotatably connected to the rotating housing; A collecting component, which is mounted on the fixing frame and is used to collect images captured by the lens component; An adjustment component, the adjustment component is mounted on the handheld housing and is used to adjust the position of the lens assembly; A liquid discharge assembly is installed inside the lens assembly and is used for discharging liquid.

[0007] Based on the above solution, the lens assembly includes: A lens barrel, the lens barrel is fixedly mounted on an end of the lens tube away from the ring sleeve; A zoom lens, the zoom lens being fixedly mounted on an end of the lens barrel away from the lens tube; An illuminating lamp is fixedly mounted on the lens barrel and is located above the zoom lens.

[0008] Based on the above solution, the collection component includes: A collecting wire harness, wherein the collecting wire harness is arranged inside the lens tube, and one end of the collecting wire harness is electrically connected to the zoom lens; Wherein, the position where the collecting wire harness contacts the fixing frame is a rotational fit; A first connector, the first connector is fixedly mounted on one end of the fixing frame away from the mirror tube, and the first connector is rotatably connected to the other end of the collecting harness; A second wire harness is disposed inside the handheld housing, and one end of the second wire harness is fixedly connected to the first connector.

[0009] On the basis of the above scheme, the adjustment component includes: A rotating cylinder, the rotating cylinder is rotatably mounted inside the handheld housing, and the rotating cylinder is fixedly connected to the mirror tube; An outer ring, the outer ring is rotatably mounted on the handheld housing, and the rotating cylinder is located inside the outer ring; A transmission part is mounted on the handheld housing and is used for transmitting power.

[0010] On the basis of the above scheme, the transmission part includes: An outer gear ring, the outer gear ring is fixedly mounted on the rotating cylinder; An inner gear ring, the inner gear ring is fixedly mounted inside the outer ring, and the outer gear ring is located inside the inner gear ring; Transmission gears: two transmission gears are symmetrically and rotatably mounted on the handheld housing, and the two transmission gears are respectively meshed with the outer gear ring and the inner gear ring.

[0011] On the basis of the above scheme, it further comprises an instrument tube, the instrument tube is fixedly installed inside the lens tube, one end of the instrument tube is installed on the lens barrel, the connection position between the instrument tube and the lens barrel is located at the lower part of the zoom lens, and the other end of the instrument tube is fixedly connected to the rotating shell; An arc frame is fixedly mounted on the fixing frame and is adapted to the instrument tube.

[0012] Based on the above solution, the drainage assembly includes: A water pipe, wherein two water pipes are provided, the two water pipes are fixedly installed inside the mirror tube, one end of the two water pipes is located inside the mirror tube, and the two water pipes are symmetrically arranged relative to the instrument tube; Connecting pipes, two of the water pipes are located at one end of the lens barrel and are connected to a plurality of connecting pipes at equal distances, and the connecting pipes are connected to the lens barrel; A water supply unit, which is installed on the fixing frame and is used for supplying water; A drainage part is installed on the water supply part and is used for drainage.

[0013] On the basis of the above scheme, the water supply unit includes: A pipe joint, wherein two pipe joints are provided, and the two pipe joints are fixedly mounted on both sides of the handheld housing, and the two pipe joints are symmetrically arranged; A docking ring is fixedly mounted on the fixing frame and is sealed and rotatably connected to the rotating shell.

[0014] In addition to the above solutions, it also includes: A cavity, both sides of the interior of the docking ring are provided with the cavity; A pipeline is provided, wherein the two pipe joints are connected to the two cavities by the pipeline.

[0015] On the basis of the above scheme, the drainage part comprises: Drainage shells, two of which are symmetrically and fixedly mounted on the rotating shell, and the two drainage shells are respectively connected to the two water pipes; A through groove is provided at positions of the two cavities close to the rotating shell, and the through groove is adapted to the drainage shell.

[0016] The working principle and beneficial effects of the present invention are: 1. In the present invention, the information observed by the zoom lens will be transmitted through the collecting harness. Through the setting of the first joint, the information will be transmitted to the second harness. The second harness is connected to the display device, so that the collected information is converted into an image in real time through the display device, which is convenient for observation and recording. When the position of the mirror tube is adjusted, the mirror tube will rotate relative to the ring sleeve, and the mirror tube will drive the collecting harness to rotate. Through the setting of the first joint, the first joint will rotate relative to the collecting harness, thereby avoiding the torsion of the collecting harness and improving the stability of information transmission.

[0017] 2. In the present invention, the instrument tube is used for the passage of external instruments, so that medication, tissue collection, and surgery can be performed on the inspection site through the external instruments. Through the setting of the arc frame, in the process of adjusting the position of the lens barrel, space for displacement of the external instruments can be provided, and interference between the instruments and other components can be avoided, thereby improving stability during use.

[0018] 3. In the present invention, when the position of the mirror tube is adjusted, the mirror tube will drive the rotating shell to rotate, and the rotating shell will drive the drainage shell to rotate. Through the cooperation of the through groove and the cavity, the passage and entry of the liquid will not be affected.

[0019] 4. In the present invention, by setting the adjustment component and cooperating with the lens component, when the position of the mirror tube is adjusted, the information transmission will not be affected. At the same time, the focal length is automatically adjusted by the zoom lens to adapt to the distance change between the lens position of the zoom lens and the observation position, thereby facilitating observation. By setting the drainage component, not only can liquid be supplied to the designated part, but also excess liquid can be discharged, thereby reducing the patient's discomfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure from another angle in the present invention; Figure 3 It is a schematic diagram of a three-dimensional structure in cross section in the present invention; Figure 4 is a schematic cross-sectional structural diagram of a lens assembly in the present invention; Figure 5 It is a cross-sectional structural schematic diagram of the adjustment component in the present invention; Figure 6 It is a schematic diagram of the structure of the outer ring and the inner gear ring in the present invention; Figure 7 It is a schematic cross-sectional structural diagram of the liquid discharge assembly in the present invention; Figure 8 It is a cross-sectional structural schematic diagram of the cooperation between the collecting component and the draining component in the present invention; Fig. 9 It is a schematic cross-sectional structure diagram of the cooperation between the water supply part and the drainage part in the present invention.

[0022] The numbers in the figure represent: 1. handheld shell; 2. ring sleeve; 3. mirror tube; 4. rotating shell; 5. fixed frame; 6. mirror tube; 7. zoom lens; 8. lighting lamp; 9. collection harness; 10. first connector; 11. second harness; 12. rotating cylinder; 13. outer ring; 14. outer gear ring; 15. inner gear ring; 16. transmission gear; 17. instrument tube; 18. arc frame; 19. water pipe; 20. connecting pipe; 21. pipe joint; 22. docking ring; 23. cavity; 24. pipeline; 25. drainage shell; 26. through groove. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figures 1 to 9 As shown, a variable-focus endoscope comprises a handheld housing 1, a ring sleeve 2, a mirror tube 3, a lens assembly, a rotating shell 4, a fixing frame 5, a collecting assembly, an adjusting assembly and a drain assembly. The ring sleeve 2 is fixedly mounted on the handheld housing 1, the mirror tube 3 is rotatably mounted inside the ring sleeve 2, one end of the mirror tube 3 is located inside the handheld housing 1, the lens assembly is mounted on the end of the mirror tube 3 away from the ring sleeve 2, and is used to collect images. The lens assembly comprises a lens barrel 6, a zoom lens 7 and an illuminator 8. The lens barrel 6 is fixedly mounted on the end of the mirror tube 3 away from the ring sleeve 2, the zoom lens 7 is fixedly mounted on the end of the lens barrel 6 away from the mirror tube 3, the illuminator 8 is fixedly mounted on the lens barrel 6, and the illuminator 8 is located on the upper part of the zoom lens 7.

[0025] Specifically, endoscopes are often used to inspect the digestive tract. When using the lens assembly for observation, first hold the handheld shell 1, and use the handheld shell 1 to drive the mirror tube 3 to move. Through the setting of the mirror tube 3, the lens barrel 6 is extended to the observation position. At this time, the lighting lamp 8 and the zoom lens 7 are started. Through the cooperation of the lighting lamp 8 and the zoom lens 7, the observation part is observed. Through the setting of the collection component, the collection component will be connected to the display device so that the image observed by the zoom lens 7 is transmitted to the display device. During the inspection, when the field of view of the zoom lens 7 is limited, the adjustment component is started to adjust the position of the mirror tube 3. At the same time, the focal length is automatically adjusted through the zoom lens 7 to adapt to the distance change between the lens position of the zoom lens 7 and the observation position, so as to facilitate observation. At the same time, through the setting of the drainage component, when it is necessary to collect tissues in certain parts during the inspection, the body fluids that may be produced are absorbed, thereby reducing the patient's discomfort. When medication is required to certain parts of the digestive tract, the drainage component can also be used to complete it.

[0026] like Figure 3 As shown, the rotating shell 4 is fixedly mounted on the mirror tube 3, the fixing frame 5 is fixedly mounted on the handheld outer shell 1, the fixing frame 5 is rotationally connected to the rotating shell 4, the collecting assembly is mounted on the fixing frame 5, and is used to collect the image captured by the lens assembly, the collecting assembly includes a collecting harness 9, a first connector 10 and a second harness 11, the collecting harness 9 is arranged inside the mirror tube 3, one end of the collecting harness 9 is electrically connected to the zoom lens 7, wherein the position where the collecting harness 9 contacts the fixing frame 5 is rotationally matched, the first connector 10 is fixedly mounted on one end of the fixing frame 5 away from the mirror tube 3, the first connector 10 is rotationally connected to the other end of the collecting harness 9, the second harness 11 is arranged inside the handheld outer shell 1, and one end of the second harness 11 is fixedly connected to the first connector 10.

[0027] Specifically, when the zoom lens 7 is used to observe the observation area, the information observed by the zoom lens 7 will be transmitted through the collecting harness 9, and through the setting of the first connector 10, the information will be transmitted to the second harness 11, and the second harness 11 is connected to the display device, so that the collected information can be converted into an image in real time through the display device, which is convenient for observation and recording. When the position of the mirror tube 3 is adjusted, the mirror tube 3 will rotate relative to the ring sleeve 2, and the mirror tube 3 will drive the collecting harness 9 to rotate. Through the setting of the first connector 10, the first connector 10 will rotate relative to the collecting harness 9, thereby avoiding the torsion of the collecting harness 9 and improving the stability of information transmission.

[0028] like Figure 5 , Figure 6As shown, the adjustment component is installed on the handheld housing 1, and is used to adjust the position of the lens assembly. The adjustment component includes a rotating cylinder 12, an outer ring 13 and a transmission part. The rotating cylinder 12 is rotatably installed inside the handheld housing 1, and the rotating cylinder 12 is fixedly connected to the lens tube 3. The outer ring 13 is rotatably installed on the handheld housing 1, and the rotating cylinder 12 is located inside the outer ring 13. The transmission part is installed on the handheld housing 1 for transmitting power. The transmission part includes an outer gear ring 14, an inner gear ring 15 and a transmission gear 16. The outer gear ring 14 is fixedly installed on the rotating cylinder 12, and the inner gear ring 15 is fixedly installed inside the outer ring 13. The outer gear ring 14 is located inside the inner gear ring 15. Two transmission gears 16 are symmetrically and rotatably installed on the handheld housing 1, and the two transmission gears 16 are respectively meshed with the outer gear ring 14 and the inner gear ring 15.

[0029] Specifically, when adjusting the position of the mirror tube 3, hold and twist the outer ring 13, the outer ring 13 drives the inner gear ring 15 to rotate, the inner gear ring 15 drives the transmission gear 16 to rotate, the transmission gear 16 drives the outer gear ring 14 to rotate, the outer gear ring 14 drives the rotating cylinder 12 to rotate, thereby driving the mirror tube 3 to rotate in the ring sleeve 2, so as to adjust the angular position of the mirror tube 3 by a certain angle.

[0030] The above, such as Figure 8 As shown, it also includes an instrument tube 17 and an arc frame 18. The instrument tube 17 is fixedly installed inside the lens tube 3. One end of the instrument tube 17 is installed on the lens barrel 6. The connection position between the instrument tube 17 and the lens barrel 6 is located at the lower part of the zoom lens 7. The other end of the instrument tube 17 is fixedly connected to the rotating shell 4. The arc frame 18 is fixedly installed on the fixed frame 5. The arc frame 18 is adapted to the instrument tube 17.

[0031] Specifically, the instrument tube 17 is used for the passage of external instruments, so that the external instruments can be used to administer medicine, collect tissues, and perform operations on the examination site. Through the setting of the arc frame 18, during the process of adjusting the position of the lens barrel 6, space for displacement of the external instruments can be provided, and interference between the instruments and other components can be avoided.

[0032] like Figures 7 to 9 As shown, the drainage component is installed inside the lens assembly for discharging liquid. The drainage component includes a water pipe 19, a connecting pipe 20, a water supply part and a drainage part. Two water pipes 19 are provided. The two water pipes 19 are fixedly installed inside the lens tube 3. One end of the two water pipes 19 is located inside the lens barrel 6. The two water pipes 19 are symmetrically arranged relative to the instrument tube 17. The two water pipes 19 are located at one end of the lens barrel 6 and are connected to multiple connecting pipes 20 at equal distances. The connecting pipes 20 are connected to the lens barrel 6. The water supply part is installed on the fixed frame 5 for water supply, and the drainage part is installed on the water supply part for drainage.

[0033] Specifically, when medication needs to be administered to certain parts of the digestive tract, the liquid supply device and the liquid absorption device are first connected to the water supply part respectively, and at the same time, through the setting of the drainage part, the liquid supply device is turned on to discharge the liquid into one of the water pipes 19, and then the medication is administered to the designated part through the setting of the corresponding connecting pipe 20. Then, when body fluid needs to be absorbed, the liquid absorption device is started to absorb the body fluid in the designated part, thereby achieving the effect of administering medication or absorbing body fluid to the designated part.

[0034] The above, such as Fig. 9 As shown, the water supply part includes a pipe joint 21 and a docking ring 22. Two pipe joints 21 are provided. The two pipe joints 21 are fixedly mounted on both sides of the handheld housing 1. The two pipe joints 21 are symmetrically arranged. The docking ring 22 is fixedly mounted on the fixed frame 5. The docking ring 22 is sealed and rotatably connected to the rotating shell 4. It also includes a cavity 23 and a pipeline 24. Cavities 23 are opened on both sides of the docking ring 22. Pipelines 24 are connected between the two pipe joints 21 and the two cavities 23.

[0035] Specifically, when supplying liquid, the liquid supply device is connected to one of the pipe joints 21, and the liquid is discharged into the pipeline 24 through the pipe joint 21, and then the liquid is discharged into the cavity 23 through the pipeline 24 to achieve liquid supply. When absorbing body fluids, the liquid absorption device is connected to the other pipe joint 21, and the liquid in the designated part is sucked into the water pipe 19 through the corresponding connecting pipe 20, and enters the corresponding pipeline 24 through another cavity 23, and can be absorbed by the liquid absorption device.

[0036] The above, such as Fig. 9 As shown, the drainage part includes a drainage shell 25 and a through groove 26. Two drainage shells 25 are symmetrically and fixedly installed on the rotating shell 4. The two drainage shells 25 are respectively connected to two water pipes 19. The two cavities 23 are each provided with a through groove 26 near the rotating shell 4, and the through groove 26 is adapted to the drainage shell 25.

[0037] Specifically, when supplying liquid, the liquid entering the corresponding cavity 23 will enter the corresponding drainage shell 25 through the through groove 26, and then enter the corresponding water pipe 19 to realize liquid supply. When adjusting the position of the mirror tube 3, the mirror tube 3 will drive the rotating shell 4 to rotate, and the rotating shell 4 will drive the drainage shell 25 to rotate. Through the cooperation of the through groove 26 and the cavity 23, the passage and entry of the liquid will not be affected.

[0038] In summary, endoscopes are often used to inspect the digestive tract. When using the zoom lens 7 for observation, first hold the handheld housing 1, and use the handheld housing 1 to drive the mirror tube 3 to move. Through the setting of the mirror tube 3, the lens barrel 6 is extended to the observation position. At this time, start the lighting lamp 8 and the zoom lens 7. Through the cooperation of the lighting lamp 8 and the zoom lens 7, the observation area is observed. The information observed by the zoom lens 7 will be transmitted through the collection harness 9. Through the setting of the first connector 10, the information will be transmitted to the second harness 11. The second harness 11 is connected to the display device, so that the collected information is converted into an image in real time through the display device, which is convenient for observation and recording.

[0039] When the field of view of the zoom lens 7 is limited, the position of the lens tube 3 needs to be adjusted. The outer ring 13 is held and twisted. The outer ring 13 drives the inner gear ring 15 to rotate. The inner gear ring 15 drives the transmission gear 16 to rotate. The transmission gear 16 drives the outer gear ring 14 to rotate. The outer gear ring 14 drives the rotating cylinder 12 to rotate, thereby driving the lens tube 3 to rotate in the ring sleeve 2, so as to adjust the angle position of the lens tube 3 by a certain angle. At this time, the lens tube 3 will rotate relative to the ring sleeve 2, and the lens tube 3 will drive the collection harness 9 to rotate. Rotation, through the setting of the first joint 10, the first joint 10 will rotate relative to the collecting harness 9, avoiding the twisting of the collecting harness 9 and improving the stability of information transmission. At the same time, the focal length is automatically adjusted through the zoom lens 7 to adapt to the distance change between the lens position of the zoom lens 7 and the observation position time, which is convenient for observation. At the same time, as the mirror tube 3 rotates, the rotating shell 4 is driven to rotate. At this time, the rotating shell 4 will drive the drainage shell 25 to rotate. Through the cooperation of the through groove 26 and the cavity 23, it will not affect the passage and entry of the liquid.

[0040] The instrument tube 17 is used for the passage of external instruments, so that the external instruments can be used to administer medicine, collect tissues, and perform operations on the examination site. Through the setting of the arc frame 18, space for displacement of the external instruments can be provided during the process of adjusting the position of the lens barrel 6, and interference between the instruments and other components can be avoided.

[0041] When it is necessary to collect tissues in certain parts during the examination process, the body fluids that may be produced are absorbed to reduce the patient's discomfort. When it is necessary to administer medicine to certain parts of the digestive tract, the drainage component can also be used to complete it. When it is necessary to administer medicine to certain parts of the digestive tract, the liquid supply device and the liquid absorption device are first connected to the corresponding pipe joints 21 respectively. When supplying liquid, the liquid is discharged into the pipeline 24 through the pipe joint 21, and then the liquid is discharged into the cavity 23 through the pipeline 24. The liquid entering the corresponding cavity 23 will enter the corresponding drainage shell 25 through the through groove 26, and then enter the corresponding water pipe 19 to realize liquid supply. When absorbing body fluids, the liquid absorption device is connected to another pipe joint 21, and the liquid in the designated part is sucked into the water pipe 19 through the corresponding connecting pipe 20, and enters the corresponding pipeline 24 through another cavity 23, and can be sucked away by the liquid absorption device.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A variable-focus endoscope, characterized in that: include: Handheld housing (1); A ring sleeve (2), wherein the ring sleeve (2) is fixedly mounted on the handheld housing (1); A mirror tube (3), the mirror tube (3) being rotatably mounted inside the ring sleeve (2), and one end of the mirror tube (3) being located inside the handheld housing (1); A lens assembly, the lens assembly being mounted on an end of the mirror tube (3) away from the ring sleeve (2) and being used for collecting images; A rotating shell (4), the rotating shell (4) being fixedly mounted on the mirror tube (3); A fixed frame (5), the fixed frame (5) being fixedly mounted on the handheld housing (1), the fixed frame (5) being rotatably connected to the rotating housing (4); A collecting component, the collecting component is mounted on the fixing frame (5) and is used to collect images captured by the lens component; An adjustment component, the adjustment component being mounted on the handheld housing (1) and being used to adjust the position of the lens assembly; A liquid discharge assembly is installed inside the lens assembly and is used for discharging liquid.

2. A variable-focus endoscope according to claim 1, characterized in that: The lens assembly comprises: A lens barrel (6), the lens barrel (6) being fixedly mounted on an end of the lens tube (3) away from the ring sleeve (2); A zoom lens (7), the zoom lens (7) being fixedly mounted on an end of the lens barrel (6) away from the lens tube (3); An illuminating lamp (8), the illuminating lamp (8) being fixedly mounted on the lens barrel (6), and the illuminating lamp (8) being located above the zoom lens (7).

3. A variable-focus endoscope according to claim 2, characterized in that: The collection component comprises: A collecting wire harness (9), the collecting wire harness (9) being arranged inside the lens tube (3), one end of the collecting wire harness (9) being electrically connected to the zoom lens (7); Wherein, the contact position between the collecting wire harness (9) and the fixing frame (5) is a rotational fit; a first connector (10), the first connector (10) being fixedly mounted on one end of the fixing frame (5) away from the mirror tube (3), the first connector (10) being rotatably connected to the other end of the collecting wire harness (9); A second wire harness (11), wherein the second wire harness (11) is arranged inside the handheld housing (1), and one end of the second wire harness (11) is fixedly connected to the first connector (10).

4. A variable-focus endoscope according to claim 3, characterized in that: The adjustment component comprises: A rotating cylinder (12), the rotating cylinder (12) being rotatably mounted inside the handheld housing (1), the rotating cylinder (12) being fixedly connected to the mirror tube (3); An outer ring (13), the outer ring (13) being rotatably mounted on the handheld housing (1), and the rotating cylinder (12) being located inside the outer ring (13); A transmission part, the transmission part is mounted on the handheld housing (1) and is used to transmit power.

5. A variable-focus endoscope according to claim 4, characterized in that: The transmission part comprises: An outer gear ring (14), the outer gear ring (14) being fixedly mounted on the rotating cylinder (12); An inner gear ring (15), the inner gear ring (15) being fixedly mounted inside the outer ring (13), and the outer gear ring (14) being located inside the inner gear ring (15); Transmission gears (16), two transmission gears (16) are symmetrically and rotatably mounted on the handheld housing (1), and the two transmission gears (16) are respectively meshed with the outer gear ring (14) and the inner gear ring (15).

6. A variable-focus endoscope according to claim 5, characterized in that: It also comprises an instrument tube (17), the instrument tube (17) being fixedly mounted inside the lens tube (3), one end of the instrument tube (17) being mounted on the lens barrel (6), the connection position between the instrument tube (17) and the lens barrel (6) being located at the lower part of the zoom lens (7), and the other end of the instrument tube (17) being fixedly connected to the rotating shell (4); An arc frame (18), wherein the arc frame (18) is fixedly mounted on the fixed frame (5), and the arc frame (18) is adapted to fit the instrument tube (17).

7. A variable-focus endoscope according to claim 6, characterized in that: The drainage assembly comprises: A water pipe (19), wherein two water pipes (19) are provided, the two water pipes (19) are fixedly installed inside the mirror tube (3), one end of the two water pipes (19) is located inside the mirror tube (6), and the two water pipes (19) are symmetrically arranged relative to the instrument tube (17); A connecting pipe (20), wherein the two water pipes (19) are located at one end of the lens barrel (6) and are connected to a plurality of connecting pipes (20) at equal distances, and the connecting pipes (20) are connected to the lens barrel (6); a water supply unit, the water supply unit being mounted on the fixing frame (5) and being used for supplying water; A drainage part is installed on the water supply part and is used for drainage.

8. A variable-focus endoscope according to claim 7, characterized in that: The water supply unit comprises: A pipe joint (21), wherein two pipe joints (21) are provided, and the two pipe joints (21) are fixedly mounted on two sides of the handheld housing (1), and the two pipe joints (21) are symmetrically arranged; A docking ring (22), the docking ring (22) being fixedly mounted on the fixing frame (5), and the docking ring (22) being sealed and rotatably connected to the rotating shell (4).

9. A variable-focus endoscope according to claim 8, characterized in that: Also includes: A cavity (23), the cavity (23) being provided on both sides of the interior of the docking ring (22); A pipeline (24), wherein the two pipe joints (21) and the two cavities (23) are both connected by the pipeline (24).

10. The variable-focus endoscope according to claim 9, characterized in that: The drainage part comprises: Drainage shells (25), two of the drainage shells (25) are symmetrically and fixedly mounted on the rotating shell (4), and the two drainage shells (25) are respectively connected to the two water pipes (19); A through groove (26), wherein the two cavities (23) are each provided with the through groove (26) at a position close to the rotating shell (4), and the through groove (26) is adapted to fit the drainage shell (25).

Images