A laparoscope with adjustable working distance and focal length

Abstract

The present application relates to the technical field of laparoscopic endoscopes and discloses a laparoscopic endoscope with adjustable working distance and focal length, comprising a handle, a tube disposed at one end of the handle, a probe disposed at the end of the tube, a lens disposed within the probe, and a photosensitive electronic component. The tube is provided with an adjustment device, the adjustment device comprising a mounting sleeve disposed within the probe, a rotating shaft rotatably disposed within the mounting sleeve, the photosensitive electronic component disposed at the end of the mounting sleeve, the lens disposed on a movable seat corresponding to the photosensitive electronic component, the end of the movable seat being provided with two limit rods, the limit rods being inserted into the mounting sleeve and slidably engaged with the mounting sleeve, one end of the rotating shaft being provided with a driving mechanism for driving the limit rod to slide, and the other end of the rotating shaft extending beyond the end of the handle. The present application facilitates adjustment of the working focal length of the lens and the photosensitive electronic component.

Description

Technical Field

[0001] The present application relates to the technical field of laparoscopic endoscopes, and in particular to a laparoscopic endoscope with an adjustable working distance and focal length. Background Art

[0002] Laparoscopic surgery is a new minimally invasive surgical procedure that utilizes a laparoscope and other related instruments. The basic procedure involves making several small incisions, 5 to 12 mm in diameter, in different locations within the abdomen. Through these incisions, a laparoscope and various specialized surgical instruments are inserted. The laparoscope uses digital transmission technology to transmit images captured within the abdominal cavity to a television screen. The surgeon observes the images and uses various surgical instruments externally to perform the procedure. Laparoscopic surgery offers the advantages of minimal surgical trauma, shortened operative time, and rapid patient recovery. The primary function of the laparoscope is to transmit images of the abdominal cavity, providing the surgeon with a visual field for the surgical field.

[0003] During use, the endoscope will locally magnify certain locations for observation according to clinical needs in order to clearly discover the characteristics of the lesion. At the same time, the inspection must meet the requirements of conventional field of view angles, so the endoscope needs to have an optical zoom function.

[0004] However, in the process of implementing the relevant technical solutions, it was found that at least the following technical problems exist: since zooming requires adjusting the distance between the lens of the camera module and the photosensitive electronic component, and the image acquisition component in the endoscope is set at the far end of the narrow and long pipe, it makes it difficult to adjust the focal length. Summary of the Invention

[0005] The present application provides a laparoscopic endoscope with an adjustable working distance focal length, thereby solving the problem in the prior art that the focal length adjustment is difficult due to the need to adjust the distance between the lens of the camera module and the photosensitive electronic component for zooming, and the image acquisition component in the endoscope is arranged at the far end of a narrow and long pipe, thereby achieving the effect of facilitating the adjustment of the focal length of the endoscope.

[0006] The present application provides a laparoscopic endoscope with an adjustable working distance focal length, comprising a handle, a mirror tube arranged at one end of the handle, a probe arranged at the end of the mirror tube, a lens and a photosensitive electronic component arranged in the probe, wherein the mirror tube is provided with an adjustment device, the adjustment device comprises a mounting sleeve arranged in the probe, a rotating shaft rotatably arranged in the mounting sleeve, the photosensitive electronic component is arranged at the end of the mounting sleeve, the lens is arranged on a movable seat and corresponds to the photosensitive electronic component, two limit rods are provided at the end of the movable seat, the limit rods are inserted into the mounting sleeve and slidably cooperate with the mounting sleeve, one end of the rotating shaft is provided with a driving mechanism for driving the limit rod to slide, and the other end of the rotating shaft extends out of the end of the handle.

[0007] Furthermore, the ends of the two limiting rods located in the mounting sleeve are connected to a driving seat, and the driving mechanism includes a threaded sleeve arranged on the driving seat and a threaded column rotatably arranged in the mounting sleeve, the threaded column is threadedly connected to the threaded sleeve, and a driving component for driving the threaded column to rotate is provided in the probe.

[0008] Furthermore, the driving assembly includes a rotating drum arranged in the mounting sleeve, a first gear arranged at the end of the rotating drum, and a second gear arranged on the threaded column, the first gear and the second gear are engaged with each other, and a connecting assembly that can detachably connect the rotating drum and the rotating shaft is arranged in the mounting sleeve.

[0009] Furthermore, the connecting assembly includes a connecting block arranged on the inner wall of the rotating drum, a connecting disk arranged on the end of the rotating shaft, and an abutment spring sleeved on the rotating shaft. Two connecting blocks are symmetrically arranged about the axis of the rotating drum, and a connecting groove that is plugged into and cooperates with the connecting block is opened on the circumferential side of the connecting disk. The two ends of the abutment spring are respectively fixed to the connecting disk and the inner end surface of the rotating drum.

[0010] Furthermore, a positioning device is provided on the mirror handle, and the positioning device includes a driving disk rotatably set at the end of the mirror handle and a positioning disk set on the end face of the driving disk. The end of the rotating shaft passes through the center of the driving disk and the positioning disk in sequence and is fixed with a positioning block. The positioning disk is provided with a first transverse groove and a second transverse groove that are perpendicular to each other and connected. The positioning block is inserted into the first transverse groove or the second transverse groove. The groove depth of the first transverse groove is smaller than the groove depth of the second transverse groove. When the positioning block is inserted into the first transverse groove, the connecting disk is plugged into the connecting block.

[0011] Furthermore, a cleaning device is provided on the mirror tube, and a plurality of water holes are provided on the probe. The cleaning device includes a water inlet provided on the mirror handle and connected to the mirror tube, a fixed ring provided in the probe and away from the mounting sleeve, a movable sleeve slidably provided in the probe, and a connecting spring connecting the movable sleeve and the fixed ring. The movable sleeve is slidably provided between the mounting sleeve and the fixed ring, one end of the movable sleeve is connected to the mirror tube, a plurality of connecting holes are provided on the circumferential side of the movable sleeve, an annular hole is provided on the inner side wall of the probe, the two ends of the water hole are respectively connected to the probe end and the annular hole, and a moving mechanism for driving the connecting hole to connect with the annular hole is provided in the probe.

[0012] Furthermore, the moving mechanism includes a mounting block arranged on the inner side wall of the movable sleeve and a pull rope arranged on the mounting block. The pull rope is arranged along the length direction of the mirror tube, and the other end of the pull rope passes through the mirror handle. A fixing mechanism for fixing the pull rope is provided on the mirror handle.

[0013] Furthermore, the fixing mechanism includes a fixed block arranged on the mirror handle, a first movable rod hinged on the fixed block, a second movable rod obliquely arranged at the end of the first movable rod, and a fixed sleeve slidably connected to the mirror handle. The pull rope is fixedly connected to the first movable rod, and the second movable rod is inserted into the fixed sleeve when it is rotated to horizontal.

[0014] Furthermore, a dovetail groove is provided on the mirror handle, and the dovetail groove is arranged along the length direction of the mirror tube. The lower end of the fixed sleeve is provided with a dovetail block slidably connected to the dovetail groove. A magnet is provided at one end of the dovetail groove close to the fixed block, and the dovetail block is magnetically attracted to the magnet.

[0015] Furthermore, a plurality of through holes are formed at the end of the probe, and a guide cover is provided at the end of the probe and outside the through holes, with the opening of the guide cover facing the center of the end of the probe.

[0016] The technical solution provided in this application has at least the following technical effects or advantages:

[0017] 1. Due to the use of an adjustment device, the limiting rod can be driven to move along the length direction of the probe by rotating the rotating shaft at the end of the handle, driving the mounting sleeve with the photosensitive electronic component to move inside the probe, and adjusting the distance between the photosensitive electronic component and the lens. This solves the problem in the prior art that the distance between the lens of the camera module and the photosensitive electronic component needs to be adjusted due to zooming, and the image acquisition component in the endoscope is arranged at the far end of a narrow and long pipe, which makes it difficult to adjust the focal length. This achieves the effect of facilitating the adjustment of the focal length of the endoscope.

[0018] 2. Due to the use of a positioning device, when the focal length needs to be adjusted, it is easy to connect the rotating shaft, so that the focal length can be stably adjusted by rotating the rotating shaft. When the focal length does not need to be adjusted, the connection between the rotating shaft and the drive assembly is disconnected. Even if the rotating shaft is rotated, the drive assembly cannot be driven to work, thereby ensuring the stability of the focal length adjustment.

[0019] 3. Due to the use of a cleaning device, cleaning solutions such as physiological saline can be introduced into the end of the probe through the mirror tube in time to rinse the end of the probe, keep the end of the probe clean, and facilitate observation through the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the embodiment of the present application;

[0021] Figure 2 Schematic diagram of the internal structure of the probe in the embodiment of the present application;

[0022] Figure 3 Schematic diagram of the structure of the cleaning device in the embodiment of the present application;

[0023] Figure 4 for Figure 2 A magnified schematic diagram of point A in the middle;

[0024] Figure 5 for Figure 3 A magnified schematic diagram of point B in the middle;

[0025] Figure 6 for Figure 1 Enlarged schematic diagram of point C in the middle;

[0026] Figure 7 for Figure 3 Enlarged schematic diagram of point D in the middle

[0027] Figure 8 for Figure 1 Enlarged schematic diagram of point E in the middle

[0028] In the figure: 1. Mirror handle; 11. Dovetail groove; 2. Mirror tube; 21. First tube body; 22. Second tube body; 23. Third tube body; 3. Probe; 31. Lens; 32. Photosensitive electronic component; 321. Annular hole; 322. Water hole; 323. Groove; 33. Perforation; 34. Guide cover; 35. Fixed tube; 36. Movable tube; 37. Inner tube; 38. Movable tube; 381. Spherical cover; 39. Fixed spring; 4. Adjustment device; 41. Mounting sleeve; 42. Rotating shaft; 43. Movable seat; 44. Driving seat; 45. Limit rod; 5. Driving mechanism; 51. Threaded sleeve; 52. Threaded column; 53. Mounting spring; 54. Driving assembly; 5 41. Rotating drum; 542. First gear; 543. Second gear; 55. Connecting assembly; 551. Connecting block; 552. Connecting disk; 553. Abutting spring; 554. Connecting groove; 6. Positioning device; 61. Driving disk; 62. Positioning disk; 63. First transverse groove; 64. Second transverse groove; 65. Positioning block; 7. Cleaning device; 71. Water inlet; 72. Fixing ring; 73. Movable sleeve; 731. Connecting hole; 74. Connecting spring; 8. Moving mechanism; 81. Mounting block; 82. Pull rope; 9. Fixing mechanism; 91. Fixing block; 92. First movable rod; 93. Second movable rod; 94. Fixing sleeve; 95. Dovetail block; 96. Magnet. DETAILED DESCRIPTION

[0029] The embodiment of the present application discloses a laparoscopic endoscope with an adjustable working distance focal length. By rotating the rotating shaft 42 at the end of the handle 1, the limit rod 45 can be driven to move along the length direction of the probe 3, driving the mounting sleeve 41 equipped with the photosensitive electronic component 32 to move in the probe 3, and adjusting the distance between the photosensitive electronic component 32 and the lens 31. This solves the problem in the prior art that the distance between the lens of the camera module and the photosensitive electronic component needs to be adjusted due to zooming, and the image acquisition component in the endoscope is arranged at the far end of a narrow and long pipe, which makes it difficult to adjust the focal length. This achieves the effect of facilitating the adjustment of the focal length of the endoscope.

[0030] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0031] Reference Figure 1 、 Figure 2 and Figure 3 A laparoscopic endoscope with an adjustable working distance and focal length comprises a handle 1, a tube 2, a probe 3, a lens 31, and a photosensitive electronic assembly 32. The handle 1 is handle-shaped for easy gripping by the user. A display screen is hinged above the handle 1 for real-time observation of captured images. One end of the tube 2 is fixed to one end of the handle 1. The tube 2 is a long, narrow tube and comprises a first tube 21, a second tube 22, and a third tube 23, which are sequentially connected. The first tube 21 is connected to the end of the handle 1, and the third tube 23 is connected to the probe 3. The probe 3 is in the shape of a tube and sealed at the end away from the third tube 23. Both the first tube 21 and the third tube 23 are rigid tubes. The second tube 22 is a flexible tube, specifically made of rubber. The lens 31 and the photosensitive electronic assembly 32 are both mounted within the probe 3, with the lens 31 located near the end of the probe 3, which is transparent and facilitates the collection of information from the human abdominal cavity.

[0032] Reference Figure 2 、 Figure 3 、 Figure 4 and Figure 5An adjusting device 4 is installed on the mirror tube 2, and the adjusting device 4 includes a mounting sleeve 41, a rotating shaft 42, a movable seat 43, and a driving seat 44. The mounting sleeve 41 and the movable seat 43 are coaxially arranged with the probe 3. The mounting sleeve 41 is fixedly installed in the probe 3 and is located in the middle position of the probe 3. The photosensitive electronic component 32 is fixedly installed in the mounting sleeve 41 near the end of the probe 3. The movable seat 43 is slidably connected in the probe 3. The sliding direction of the movable seat 43 is consistent with the length direction of the probe 3, and is located at the position of the mounting sleeve 41 and the end of the probe 3. The lens 31 is fixedly mounted on a movable seat 43 and corresponds to the photosensitive electronic assembly 32. Two limit rods 45 are fixedly mounted on the end of the movable seat 43 near the mounting sleeve 41. The two limit rods 45 are symmetrically arranged about the center of the movable seat 43. The other ends of the limit rods 45 are inserted into the mounting sleeve 41 and slideably engage with it. The drive seat 44 is slidably connected to the interior of the mounting sleeve 41, and the ends of the limit rods 45 are fixedly connected to the end faces of the drive seat 44. The cross-section of the mounting sleeve 41 is rectangular, which enables the drive seat 44 to slide only along the length of the mounting sleeve 41 and cannot rotate. This ensures that the lens 31 can only slide along the length of the probe 3 and cannot rotate, maintaining the alignment of the lens 31 and the photosensitive electronic assembly 32. A drive mechanism 5 is mounted on the mounting sleeve 41. One end of the rotating shaft 42 is connected to the drive mechanism 5, which is used to drive the drive seat 44 to move along the length of the mounting sleeve 41. The other end of the rotating shaft 42 extends beyond the end of the lens handle 1, making it convenient for the user to adjust the working focal length of the endoscope.

[0033] Reference Figure 2 、 Figure 3 、 Figure 4 and Figure 5The drive mechanism 5 includes a threaded sleeve 51 and a threaded post 52. The ends of the threaded post 52 are rotatably connected to the inner end surfaces of the mounting sleeve 41, respectively. The center of the threaded post 52 is spaced apart from the center of the mounting sleeve 41. The threaded sleeve 51 is fixedly mounted on the drive seat 44. The threaded post 52 passes through the threaded sleeve 51 and is threadedly connected to the inner side wall of the threaded sleeve 51. By driving the threaded post 52 to rotate, the drive seat 44 can be moved along the length of the threaded post 52. A mounting spring 53 is fixedly mounted on the side of the drive seat 44 near the photosensitive electronic assembly 32. The other end of the mounting spring 53 is fixedly connected to the inner end surface of the mounting sleeve 41. A drive assembly 54 is installed in the probe 3 to drive the threaded post 52 to rotate. The driving assembly 54 includes a rotating drum 541, a first gear 542, and a second gear 543. The rotating drum 541 is rotatably connected inside the mounting sleeve 41 and close to the end away from the photosensitive electronic assembly 32. The first gear 542 is rotatably connected to the inner end surface of the mounting sleeve 41 away from the photosensitive electronic assembly 32. The first gear 542 is fixedly connected to the rotating drum 541 through a connecting column, and the second gear 543 is fixedly installed on the threaded column 52, and the first gear 542 and the second gear 543 are meshed. A connecting assembly 55 is installed in the mounting sleeve 41, which can detachably connect the rotating drum 541 and the rotating shaft 42. When the working focal length needs to be adjusted, the rotating drum 541 is connected to the rotating shaft 42 through the connecting assembly 55. By rotating the rotating shaft 42, the rotating drum 541 is driven, and then the lens 31 is driven to move. When the working focal length does not need to be adjusted and the current working focal length is maintained, the rotating shaft 42 is disconnected from the rotating drum 541. Rotating the rotating shaft 42 will not easily drive the rotating drum 541 to rotate, and thus will not change the position of the lens 31.

[0034] Reference Figure 2 、 Figure 3 、 Figure 4 and Figure 5The connecting assembly 55 includes a connecting block 551, a connecting disk 552, and an abutting spring 553. Two connecting blocks 551 are fixedly installed on the inner side wall of the rotating cylinder 541. Two connecting blocks 551 are symmetrically arranged about the axis of the rotating cylinder 541. One end of the connecting block 551 is fixedly connected to the end face of the rotating cylinder 541, and the other end of the connecting block 551 is spaced apart from the other end face of the rotating cylinder 541. One end of the rotating shaft 42 is inserted into the rotating cylinder 541, and a connecting disk 552 is fixedly installed at the end of the rotating shaft 42 inserted into the rotating cylinder 541. Two connecting grooves 554 are provided on the circumferential side of the connecting disk 552. The connecting grooves 554 correspond to the connecting blocks 551 one by one and are plugged in. The two ends of the abutting spring 553 are respectively fixed to the connecting disk 552 and the inner end face of the rotating cylinder 541. The rotating shaft 42 is a flexible shaft. When the rotating shaft 42 is not subjected to external forces, the connecting plate 552 abuts against the end of the rotating drum 541 that is closest to the photosensitive electronic component 32, and the connecting groove 554 is disconnected from the connecting block 551. Rotating the rotating shaft 42 does not easily rotate the rotating drum 541. Pulling the rotating shaft 42 causes it to move along the probe 3 away from the photosensitive electronic component 32, thereby inserting the connecting block 551 into the connecting groove 554. Rotating the rotating shaft 42 can then rotate the rotating drum 541.

[0035] Reference Figure 3 and Figure 6 A positioning device 6 is mounted on the handle 1 for positioning the end of the rotating shaft 42. The positioning device 6 includes a driving disk 61 and a positioning disk 62. The driving disk 61 is rotatably connected to the end of the handle 1 away from the tube 2. The positioning disk 62 is fixedly mounted on the end surface of the driving disk 61. The end of the rotating shaft 42 passes through the centers of the driving disk 61 and the positioning disk 62 in sequence and is fixed with a positioning block 65. The positioning disk 62 is provided with a first transverse groove 63 and a second transverse groove 64 that are perpendicular and connected to each other. The positioning block 65 is inserted into the first transverse groove 63 or the second transverse groove 64. The groove depth of the first transverse groove 63 is less than the groove depth of the second transverse groove 64. When the positioning block 65 is inserted into the second transverse groove 64, the connecting disk 552 is spaced apart from the connecting block 551, and rotating the driving disk 61 cannot drive the rotating drum 541 to rotate. When the rotating shaft 42 is pulled to move toward the mirror handle 1 and the positioning block 65 is inserted into the first transverse groove 63, the connecting disk 552 is plugged into the connecting block 551 and the driving disk 61 is rotated, which can drive the rotating drum 541 to rotate, and then the lens 31 is moved by rotating the driving disk 61 forward or reversely.

[0036] Reference Figure 2 、 Figure 3 and Figure 7A cleaning device 7 is mounted on the mirror tube 2 to facilitate cleaning the lens at the end of the probe 3. The cleaning device 7 includes a water inlet 71, a fixed ring 72, a movable sleeve 73, and a connecting spring 74. The water inlet 71 is fixedly mounted on the mirror handle 1 and is used to connect to the water supply equipment. The water inlet 71 is connected to the mirror tube 2 and the probe 3 in sequence. The fixed ring 72 is fixedly mounted in the probe 3 and is located on the side of the mounting sleeve 41 away from the end of the probe 3. The movable sleeve 73 is slidably connected to the probe 3 and is located between the fixed ring 72 and the mounting sleeve 41. The two ends of the connecting spring 74 are respectively fixedly connected to the ends of the fixed ring 72 and the movable sleeve 73. The end of the movable sleeve 73 near the fixed ring 72 is open and connected to the interior of the mirror tube 2. The movable sleeve 73 is provided with a plurality of connection holes 731 around its circumference. The inner wall of the probe 3 is provided with an annular hole 321. The end of the probe 3 is provided with a plurality of water holes 322. The water holes 322 are distributed in an annular pattern around the probe 3, and the ends of the water holes 322 respectively connect the end of the probe 3 and the annular hole 321. The action of the connecting spring 74 causes the end of the movable sleeve 73 to abut against the mounting sleeve 41, and the connection holes 731 and the annular hole 321 are offset from each other. By pulling the movable sleeve 73 toward the fixing ring 72, the connection holes 731 are aligned with the annular hole 321 and connected to the water holes 322. Liquid is introduced into the water inlet 71 and can flow into the probe 3 along the scope tube 2. The liquid then flows through the connection holes 731 of the movable sleeve 73 into the annular hole 321 and out through the water holes 322. The liquid can be saline or other disinfectant liquid that does not affect the internal abdominal examination. The end of the probe 3 is provided with a plurality of through-holes 33. A guide shield 34 is fixedly mounted on the end of the probe 3 and outside of the through-holes 33. The guide shield 34 is made of a transparent material, specifically acrylic. The opening of the guide shield 34 faces the center of the end of the probe 3, which facilitates the collection of liquid for rinsing the end of the probe 3.

[0037] Reference Figure 2 、 Figure 3 and Figure 7The probe 3 includes a fixed tube 35 and a movable tube 36. The fixed tube 35 is fixed to and communicates with the end of the mirror tube 2, and the movable tube 36 is threadedly connected to the end of the fixed tube 35. A threaded groove is formed at the end of the fixed tube 35, and a threaded tube is fixed to the end of the movable tube 36. The threaded tube is threadedly connected to the threaded groove. An inner tube 37 is fixed to the end of the fixed tube 35. After the movable tube 36 is threadedly connected to the fixed tube 35, the outer wall of the inner tube 37 is tightly abutted against the inner wall of the movable tube 36. A magnifying lens is fixedly mounted on the end of the inner tube 37 away from the fixed tube 35. The magnifying lens is spaced apart from the end of the probe 3. The end of the water hole 322 is provided with multiple grooves 323. A movable connecting pipe 38 is slidably connected within the grooves 323. One end of the movable connecting pipe 38 passes through the lens and is integrally formed with a spherical cover 381. The spherical cover 381 is inserted into the through-hole 33 and abuts against the opening of the through-hole 33. A fixing spring 39 is fixedly mounted at the bottom of the groove 323. The other end of the fixing spring 39 is fixedly connected to the end of the movable connecting pipe 38. The water hole 322 is connected to the movable connecting pipe 38 and the through-hole 33. When the movable tube 36 is screwed onto the fixed tube 35, the spherical cover 381 can always abut against the opening of the through-hole 33.

[0038] Reference Figure 2 、 Figure 3 and Figure 8A moving mechanism 8 is installed in the probe 3 to drive the movable sleeve 73 to move toward the fixed ring 72, so that the connecting hole 731 is connected to the annular hole 321. The moving mechanism 8 includes a mounting block 81 and a pull rope 82. The mounting block 81 is fixedly installed on the inner side wall of the movable sleeve 73 and near the fixed ring 72. One end of the pull rope 82 is fixedly connected to the mounting block 81. The other end of the pull rope 82 is set along the mirror tube 2 and passes through the mirror handle 1. A fixing mechanism 9 is installed on the mirror handle 1 to fix the pull rope 82. The fixing mechanism 9 includes a fixing block 91, a first movable rod 92, a second movable rod 93, and a fixing sleeve 94. The fixing block 91 is fixedly installed on the upper end surface of the mirror handle 1. The first movable rod 92 is hinged to the fixing block 91 and is horizontally arranged. The second movable rod 93 is integrally formed at one end of the first movable rod 92 near the mirror tube 2, and the other end of the second movable rod 93 is tilted upward. The pull rope 82 is fixedly connected to the first movable rod 92. A dovetail groove 11 is defined in the handle 1, the length of which aligns with the length of the tube 2. A dovetail block 95 is fixedly mounted on the lower end of the fixed sleeve 94, which slides into the dovetail groove 11. By moving the second movable rod 93 toward the side closest to the handle 1, i.e., pulling the drawstring 82, the movable sleeve 73 moves toward the side of the fixed ring 72. By rotating the second movable rod 93 horizontally, the fixed sleeve 94 is moved, inserting the second movable rod 93 into the fixed sleeve 94, thereby securing the drawstring 82 and placing electrical communication between the connecting hole 731 and the annular hole 321. A magnet 96 is fixedly mounted on the end of the dovetail groove 11 near the fixed block 91. The dovetail block 95 is magnetically attracted to the magnet 96, facilitating the positioning of the fixed sleeve 94. When the end of the probe 3 needs to be sealed, the fixing sleeve 94 is pulled to move the fixing sleeve 94 to the end of the dovetail groove 11 away from the fixing block 91 , and the first movable rod 92 is restored to a horizontal state under the action of the connecting spring 74 .

[0039] The working principle of the embodiment of the present application is: by placing the positioning block 65 in the first transverse groove 63, rotating the drive disk 61 at the end of the mirror handle 1, driving the rotating shaft 42 to rotate, and being able to drive the drive seat 44 to move along the length direction of the mounting sleeve 41, drive the limit rod 45 to move along the length direction of the probe 3, and then drive the mounting sleeve 41 on which the photosensitive electronic component 32 is installed to move in the probe 3, thereby adjusting the distance between the photosensitive electronic component 32 and the lens 31 and adjusting the working focal length.

[0040] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

[0041] The above is only a preferred specific implementation method of the embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the present application within the technical scope disclosed in the present application, and they should be covered by the scope of protection of the present application.

Claims

1. A laparoscopic endoscope with an adjustable working distance focal length, comprising a handle (1), a mirror tube (2) arranged at one end of the handle (1), a probe (3) arranged at the end of the mirror tube (2), a lens (31) and a photosensitive electronic component (32) arranged in the probe (3), characterized in that: An adjusting device (4) is provided on the mirror tube (2), and the adjusting device (4) comprises a mounting sleeve (41) disposed in the probe (3) and a rotating shaft (42) rotatably disposed in the mounting sleeve (41); The photosensitive electronic component (32) is arranged at the end of the mounting sleeve (41), the lens (31) is arranged on the movable seat (43) and corresponds to the photosensitive electronic component (32), the end of the movable seat (43) is provided with two limiting rods (45), the limiting rods (45) are inserted into the mounting sleeve (41) and slidably cooperate with the mounting sleeve (41), one end of the rotating shaft (42) is provided with a driving mechanism (5) for driving the limiting rods (45) to slide, and the other end of the rotating shaft (42) extends out of the end of the lens handle (1); The ends of the two limiting rods (45) located in the mounting sleeve (41) are connected to a driving seat (44), and the driving mechanism (5) includes a threaded sleeve (51) arranged on the driving seat (44) and a threaded column (52) rotatably arranged in the mounting sleeve (41); The threaded column (52) is threadedly connected to the threaded sleeve (51), and a driving component (54) for driving the threaded column (52) to rotate is provided in the probe (3); The driving assembly (54) includes a rotating drum (541) disposed in the mounting sleeve (41), a first gear (542) disposed at the end of the rotating drum (541), and a second gear (543) disposed on the threaded column (52), wherein the first gear (542) and the second gear (543) are meshed with each other, and a connecting assembly (55) for detachably connecting the rotating drum (541) and the rotating shaft (42) is disposed in the mounting sleeve (41); The connecting assembly (55) includes a connecting block (551) provided on the inner wall of the rotating drum (541), a connecting disk (552) provided at the end of the rotating shaft (42), and an abutting spring (553) sleeved on the rotating shaft (42). Two connecting blocks (551) are symmetrically provided about the axis of the rotating drum (541). A connecting groove (554) for plugging and matching with the connecting block (551) is provided on the circumference of the connecting disk (552). Both ends of the abutting spring (553) are fixed to the connecting disk (552) and the inner end surface of the rotating drum (541), respectively. The mirror handle (1) is provided with a positioning device (6), and the positioning device (6) comprises a driving disk (61) rotatably provided at the end of the mirror handle (1) and a positioning disk (62) provided at the end surface of the driving disk (61); The end of the rotating shaft (42) passes through the center of the driving disk (61) and the positioning disk (62) in sequence and is fixed with a positioning block (65). The positioning disk (62) is provided with a first transverse groove (63) and a second transverse groove (64) that are perpendicular to each other and connected. The positioning block (65) is inserted into the first transverse groove (63) or the second transverse groove (64). The groove depth of the first transverse groove (63) is smaller than the groove depth of the second transverse groove (64). When the positioning block (65) is inserted into the first transverse groove (63), the connecting disk (552) is plugged into and matched with the connecting block (551).

2. A laparoscopic endoscope with adjustable working distance and focal length as claimed in claim 1, characterized in that: The mirror tube (2) is provided with a cleaning device (7), and the probe (3) is provided with a plurality of water holes (322). The cleaning device (7) comprises a water inlet (71) provided on the mirror handle (1) and in communication with the mirror tube (2), a fixed ring (72) provided in the probe (3) and away from the mounting sleeve (41), a movable sleeve (73) slidably provided in the probe (3), and a connecting spring (74) connecting the movable sleeve (73) and the fixed ring (72); The movable sleeve (73) is slidably arranged between the mounting sleeve (41) and the fixed ring (72), one end of the movable sleeve (73) is connected to the inside of the mirror tube (2), a plurality of connection holes (731) are provided on the peripheral side of the movable sleeve (73), an annular hole (321) is provided on the inner side wall of the probe (3), the two ends of the water hole (322) are respectively connected to the end of the probe (3) and the annular hole (321), and a moving mechanism (8) is provided in the probe (3) for driving the connection hole (731) to communicate with the annular hole (321).

3. A laparoscopic endoscope with adjustable working distance and focal length as claimed in claim 2, characterized in that: The moving mechanism (8) comprises a mounting block (81) arranged on the inner side wall of the movable sleeve (73), and a drawstring (82) arranged on the mounting block (81); the drawstring (82) is arranged along the length direction of the mirror tube (2), and the other end of the drawstring (82) passes through the mirror handle (1); and a fixing mechanism (9) for fixing the drawstring (82) is provided on the mirror handle (1).

4. A laparoscopic endoscope with adjustable working distance and focal length as claimed in claim 3, characterized in that: The fixing mechanism (9) comprises a fixing block (91) provided on the mirror handle (1), a first movable rod (92) hingedly connected to the fixing block (91), a second movable rod (93) obliquely provided at the end of the first movable rod (92), and a fixing sleeve (94) slidably connected to the mirror handle (1); The pull rope (82) is fixedly connected to the first movable rod (92), and the second movable rod (93) is inserted into the fixed sleeve (94) when it rotates to a horizontal position.

5. The laparoscopic endoscope with adjustable working distance and focal length as claimed in claim 4, characterized in that: The mirror handle (1) is provided with a dovetail groove (11), and the dovetail groove (11) is arranged along the length direction of the mirror tube (2). The lower end of the fixed sleeve (94) is provided with a dovetail block (95) slidably connected to the dovetail groove (11). The end of the dovetail groove (11) close to the fixed block (91) is provided with a magnet (96), and the dovetail block (95) is magnetically attracted to the magnet (96).

6. The laparoscopic endoscope with adjustable working distance and focal length as claimed in claim 2, characterized in that: The end of the probe (3) is provided with a plurality of through-holes (33), and a guide cover (34) is provided at the end of the probe (3) and outside the through-holes (33), with the opening of the guide cover (34) facing the center of the end of the probe (3).

Images