Endoscope lens adjustment structure and endoscope

Abstract

The present invention discloses an endoscope lens adjustment structure, which is composed of a rotating structure and a plug-in structure connected together, and is used to connect the control handle of the endoscope with the cable of the endoscope lens assembly, wherein the structure includes a connecting sleeve, on which internal and external threaded parts respectively adapted to the rotating structure and the plug-in structure are formed, wherein the rotating structure is configured as follows: the connecting sleeve and the first fixing part respectively abut against two sides of a rotating part along its rotational forward direction, so that the three-part sheathed integral body forms an adjustable screw connection in the rotational forward direction with the joint part adapted to the endoscope cannula part; the plug-in structure is configured as follows: one end of the plug-in male and female head combination is adapted to the control handle, and the other end is screwed to the connecting sleeve, so that the connecting sleeve, the rotating structure and the plug-in structure are connected together to form an integrated structure without relative displacement, and the endoscope lens adjustment structure is improved to solve the technical problem that the cable core is easy to break.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to an endoscope lens adjustment structure for adjusting the position of a lens assembly in an endoscope structure, and an endoscope having the structure. Background Art

[0002] An endoscope generally consists of a grippable control handle and a tube at the front end of the handle that can be inserted into the patient's body. The long, straight tube houses a lens assembly, whose cable runs through the tube and connects to the control handle. Once inside the patient, the lens assembly, illuminated by a light source, produces real-time images of the patient's internal tissues.

[0003] The imaging quality of the lens assembly is affected by many factors, with the distance between the lens assembly's tip and the cannula being a particularly important consideration. If the distance between the lens assembly's tip and the cannula's tip is too far, the image will appear blurry, dark, or otherwise unobservable due to the distance from the tissue being observed. If the distance between the lens assembly's tip and the cannula's tip is too close, the light from the lens assembly's light source will be reflected and diffused as it passes through the cannula's transparent body, resulting in the image appearing as a flare or bright spot.

[0004] In reality, the length and configuration of the lens assembly cable determine the position of the lens assembly's head within the cannula, as well as the distance between the front end of the head and the tip of the cannula. To ensure the lens head is always in the optimal imaging position and to enable adjustable positioning within the cannula, existing solutions employ a movable adjustment mechanism between the handle and the cannula.

[0005] The conventional adjustment mechanism here is based on the idea of ​​converting the rotational travel of the rotating component into linear travel of the lens assembly. In existing solutions, a knob is typically installed at the joint of the control handle. The knob interfaces with the lens cable, and the knob's fixed seat and the handle-cable joint form a threaded fit. Rotating the knob then adjusts the tightening and loosening of the threads at the threaded fitting, effectively converting the knob's rotational travel into linear travel.

[0006] This solution under the existing technology only considers the realization of the adjustability of the lens assembly, but ignores the problem of difficulty in fixing the cable connector that will arise from this. The cable is docked with the handle part, and the end of the entire cable needs to be stripped to expose multiple individual wire cores, and then each wire core is fixed to the docking end (such as the docking female connector) by bonding. However, during the actual assembly and placement process, the relative position between the cannula and the lens assembly changes repeatedly, that is, it is necessary to repeatedly adjust the relative position between the two through the adjustment structure, so that the cable will be repeatedly pulled during the process. The aforementioned bonding and fixing method between the wire core and the docking connector is very likely to cause the wire core to be bonded to the docking female connector, or the wire core to be directly broken.

[0007] Therefore, the existing technology should be improved to provide a new lens position adjustment structure in the endoscope structure to solve the above-mentioned problems existing in the existing technology. Summary of the Invention

[0008] In view of the deficiencies of the prior art, the present invention provides an endoscope lens adjustment structure and an endoscope that improves the endoscope lens adjustment structure to solve the problem of easy cable breakage.

[0009] In order to solve the above technical problems, the present invention adopts an endoscope lens adjustment structure, which is composed of a rotating structure and a plug-in structure, and is used to connect the control handle of the endoscope with the cable of the endoscope lens assembly, wherein, it includes a connecting sleeve, on which are formed internal and external threaded portions that are respectively adapted to the rotating structure and the plug-in structure, wherein the rotating structure is configured as follows: a rotating member abuts against the connecting sleeve and the first fixing member on both sides along its rotational forward direction, so that the three-part sleeve-formed whole forms a threaded connection that is adjustable in the rotational forward direction with the joint portion adapted to the intubation portion of the endoscope; the plug-in structure is configured as follows: one end of the male and female head combination is adapted to the control handle, and the other end is threadedly connected to the connecting sleeve, so that the connecting sleeve is connected to the rotating structure and the plug-in structure to form an integrated structure without relative displacement.

[0010] As a preferred embodiment of this solution, the connecting sleeve, rotating structure and plug-in structure are multi-level structures arranged along the cable, and a cover structure with an end of the plug-in structure is provided at the docking position between the plug-in structure and the cable, and the cover structure is partially filled with adhesive.

[0011] As a further preferred embodiment of this solution, the connecting sleeve is a semi-through body, including a tip with an opening and an external thread, and a cavity end with an internal thread, the rotating structure is docked with the tip, and the plug-in structure and the cover structure are accommodated in the cavity end.

[0012] As another preferred embodiment of this solution, in the rotating structure, the rotating member is a circular tubular semi-through member with a through hole formed at one end, and its inner cavity forms a threaded portion adapted to the joint portion, wherein the through hole of the rotating member passes through the tip of the connecting sleeve, and the first fixing member is fitted with the tip until the rotating member forms both sides of the end face of the through hole, and is located between the connecting sleeve and the first fixing member.

[0013] As a further preferred embodiment of this solution, a table-like surface is formed on the connecting sleeve at the end of its tip, and the table-like surface is defined as a first contact annular surface. A second contact annular surface abutting against the first contact annular surface is formed on the end surface of the first fixing member that is in contact with the connecting sleeve, and the ring width of the first contact annular surface is smaller than the ring width of the second contact annular surface. When the first fixing member is fitted with the tip, the first contact annular surface and the second contact annular surface are fitted, and a bayonet extending circumferentially along the bottom of the tip is formed between the connecting sleeve and the first fixing member, and the end surface of the rotating member on which the through hole is formed is located in the bayonet.

[0014] As a further preferred embodiment of this solution, an adjustment gap is formed in the bayonet between the end surface of the rotating member and the first fixing member and / or the connecting sleeve.

[0015] As a further preferred embodiment of this solution, the plug-in structure includes a male aviation plug and a female aviation plug, the male aviation plug is adapted to the control handle through a second fixing member, the cover structure is sleeved on the end of the female aviation plug, and the second fixing member is configured as follows: a widened portion is formed on the outer wall of the second fixing member of the sleeve-shaped structure, and the widened portion divides the second fixing member into two ends, one end of which is extended into the male aviation plug and locked, and the other end is extended into the control handle and locked, wherein the ends of the male aviation plug and the control handle are respectively abutted against both sides of the widened portion.

[0016] According to another aspect of the present invention, an endoscope is provided, which includes a control handle at a gripping end and an insertion end. The insertion end is provided with a lens assembly, and the lens cable of the lens assembly is docked with the handle cable in the control handle through the endoscope lens adjustment structure as described above. The endoscope also includes a pair of connectors, one end of the connector forms an interface including an external threaded portion, and the other end forms a hollow tapered portion. The insertion end is fixed to the tapered portion, and the interface extends into the inner cavity of the rotating part and matches with the threaded portion of the inner cavity of the rotating part to achieve an adjustable threaded connection between the two.

[0017] As another preferred aspect of the present invention, the lens cable passes through the rotating structure and the connecting sleeve in sequence and docks with the female connector, and the handle cable passes through the second fixing member and docks with the male connector.

[0018] Due to the adoption of the above technical solution, the present invention has the following beneficial technical effects compared with the prior art:

[0019] 1. In the two sets of structures that form an adjustable relationship, the rotating structure and the plug-in structure are respectively connected to a connecting sleeve structure, so that on the handle side of the endoscope, the plug-in structure, the control handle and the connecting sleeve structure form an integrated structure that does not produce relative displacement. On the intubation side, the rotating structure and the connecting sleeve also form another integrated structure that does not produce relative displacement. In this way, when the rotating structure rotates and produces a rotational forward displacement between the rotating structure and the docking head, there will be no displacement between the rotating structure, the plug-in structure and the connecting sleeve. Therefore, when adjusting the distance between the lens and the intubation head, the relative displacement between the lens cable and the plug-in structure is significantly reduced, improving the technical problem of easy cable breakage;

[0020] 2. On the other hand, in order to improve the fixing effect of the lens cable, a cover structure filled with adhesive is added to the female connector end, and the cover structure is placed on the female connector end so that the core of the lens cable is covered in the cover structure. In this way, the adhesive in the cover structure can immerse the part of the lens cable that connects to the female connector end in the adhesive, thereby strengthening the connection between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram showing the overall structure of an endoscope in a preferred embodiment of the present invention;

[0022] Figure 2 It is a partial exploded diagram showing Figure 1 The partially exploded structure of the endoscope is shown;

[0023] Figure 3 A schematic diagram showing Figure 2 The structure of the connecting sleeve;

[0024] Figure 4 Schematic diagram showing the state where the rotating structure and the connecting sleeve are adapted;

[0025] Figure 5 This is an exploded view showing the exploded structure of the rotating structure and the connecting sleeve;

[0026] Figure 6 This is an exploded view, showing the exploded structure of the rotating structure and the connecting sleeve from another perspective.

[0027] Figure 7 is a partial cross-sectional view showing the partial cross-sectional structure when the first fixing member is adapted to the connecting sleeve.

[0028] Figure 8 is an exploded view showing the exploded structure of the plug-in structure;

[0029] Figure 9 This is an exploded view, showing the exploded structure of the plug-in structure at another angle;

[0030] Figure 10 A schematic diagram showing Figure 8 and Figure 9 The structure of both ends of the female aviation plug;

[0031] Figure 11 This is a cross-sectional view showing the cross-sectional structure of the aviation plug female connector, aviation plug male connector and the second fixing member.

[0032] Figure 12 It is a partial cross-sectional view showing the cross-sectional structure of the plug-in structure and the control handle in a tightly fitted state;

[0033] Figure 13 is a state diagram showing the state where the lens cable is fixed to the mating end of the aviation plug female connector;

[0034] Figure 14 2 is a state diagram showing the assembly state of the cover structure and the aviation plug female in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0035] In existing endoscopes, the cable connector and adjustment section are separated. When the adjustment section rotates, it shifts relative to the connector, repeatedly pulling on the connector and lens cable connection, which can easily break the exposed cable core. Once the connection between the core and the connector breaks, imaging can be significantly affected during use, preventing successful tube placement. Furthermore, due to the delicate internal structure and the difficulty in repairing it, a broken connection requires replacing the entire front-end camera, increasing costs.

[0036] The present invention solves the technical problem in the following aspects:

[0037] 1) Reconfigure the rotating and plug-in structures to reduce the relative displacement between components during lens cable adjustment, thereby reducing the frequency and amplitude of cable pulling and the occurrence of cable core breakage;

[0038] 2) Improve the connection method between the wire core and the female connector, and reinforce the wire core connection end.

[0039] The following describes embodiments of an endoscope lens adjustment structure and endoscope according to the present invention with reference to the accompanying drawings. Those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of the claims. Furthermore, throughout this specification, the drawings are not drawn to scale, and like reference numerals represent like parts.

[0040] It should be noted that the expressions "first" and "second" used in the embodiments of the present invention are intended to distinguish two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the invention. Subsequent embodiments will not explain this one by one.

[0041] In a preferred embodiment, a nasogastric endoscope is taken as an example to schematically illustrate the structure of a preferred embodiment of the present invention. Figure 1 is a schematic diagram showing the overall structure of an endoscope in a preferred embodiment of the present invention, and Figure 2 It is a partial exploded diagram showing Figure 1 The partially exploded structure of the endoscope shown. The endoscope structure 100 includes a long hose portion 101 that is inserted into the patient's body during surgery. The hose is equipped with a lens assembly that enables endoscope visualization, an endoscope lens adjustment structure 200 that connects to the hose and controls the movement of the lens in the tube, and a control handle 300 connected to the lens adjustment structure. During operation, after the image processor plug 400 connected to the control handle 300 is connected to the image processing terminal, the hose portion 101 is inserted into the patient's nasal cavity and cooperates with the lens assembly to complete the tube placement process. In the endoscope structure 100, the lens cable of the lens assembly extends inside the hose portion 101 and extends from the head end of the lens assembly to dock with the endoscope lens adjustment structure 200.

[0042] See Figure 2 , the lens cable 102 of the lens assembly passes through a pair of connectors 103 structures. The pair of connectors 103 are open at both ends, one end of which is formed into a cylindrical interface 1031, and the other end forms a tapered portion 1032. The tapered portion 1032 is a tip with an opening (not shown). After the hose portion 101 is inserted into the opening and firmly bonded by applying colloid or hot melting, the lens cable 102 of the aforementioned lens assembly passes through the hose portion 101. The interface 1031 part is a circular sleeve, and the outer periphery of the interface 1031 forms an external threaded portion, which is defined as the first external thread 1033 for the convenience of explanation. So look back Figure 2After the overall decomposition, the endoscope lens adjustment structure 200 between the control handle and the intubation part is decomposed in the direction from the hose part 101 to the control handle 300, and includes a rotating structure 400, a connecting sleeve 500 and a plug-in structure 600. After assembly, the three form a whole that does not produce relative displacement, and the rotation structure 400 is adjusted through the screw connection with the docking head 103 to achieve the displacement of the lens cable 102 along the intubation direction.

[0043] Specifically, see Figure 3 , Figure 3 A schematic diagram showing Figure 2 The structure of the connecting sleeve in the embodiment. The connecting sleeve 500 is a hollow tubular member, including a cavity end and a tip at the bottom of the cavity. The cavity end is defined as the main tube 501, and an internal thread portion is formed in the inner cavity of the main tube 501, which is defined as a first internal thread 502. A tip 503 with an external thread is formed on the bottom end surface of the main tube 501, and the threaded portion on the tip 503 is defined as a second external thread 504. The plug-in structure 600 is inserted into the main tube 501, and is adapted to the connecting sleeve 500 through the external thread portion corresponding to the first internal thread 502. The rotating structure 400 is screwed to the tip 503, and is adapted to the connecting sleeve 500 through the internal thread portion corresponding to the second external thread 504.

[0044] Let's first talk about the rotating structure 400. In this preferred embodiment, the rotating structure 400 includes a knob 401 and a first fixing member 402. The first fixing member 402 serves as a knob fixing member to achieve the matching between the knob 401 and the connecting sleeve 500. Figure 4 This is a schematic diagram showing the state where the rotating structure and the connecting sleeve are adapted. Figure 5 It is the decomposed structure of the rotating structure and the connecting sleeve. Figure 6 This is the decomposition structure of the rotating structure and the connecting sleeve from another perspective. Figure 4 See Figure 5 and Figure 6 The knob 401 is a cylindrical, semi-through piece with an inner cavity diameter adapted to the interface 1031 of the docking head 103. A second internal thread 4011 is formed in the inner cavity. During assembly, the inner cavity can be fitted to accommodate the interface 1031. The second internal thread 4011 is adapted to be screwed together with the first external thread 1033 to form a docking connection. The other end of the knob 401 is a flat end surface including a through hole 4012. During assembly, the knob 401 can pass through the through hole 4012 and pass through the tip 503 of the connecting sleeve 500, thereby abutting against the main tube 501 of the connecting sleeve 500. At the same time, the diameter of the through hole 4012 is set to be larger than the specification of the tip 503. Therefore, a fixing member is required to fix the knob 401 and the connecting sleeve 500.

[0045] Continue to read Figures 4 to 6The first fixing member 402 is a cone, and its tapered cone forms a plane with an opening for the cable to pass through. The bottom of the cone also forms a pair of interfaces, and a third internal thread 4021 is formed in the inner cavity of the interface. The interface is adapted to the tip 503 of the connecting sleeve 500 with the second external thread 504. When the knob 401 is assembled with the tip 503 of the connecting sleeve 500, the first fixing member 402 passes through the inner cavity of the knob 401 and is tightened with the tip 503 to make the connection The connecting sleeve 500, the knob 401 and the first fixing member 402 form a whole, which can be threadedly connected to the first external thread 1033 of the docking joint 103 through the second internal thread 4011 of the knob 401. When the knob 401 is rotated, the whole consisting of the connecting sleeve 500 and the rotating structure 400 can be moved forward or backward in the direction of tube placement, and in this process, no relative displacement occurs between the whole consisting of the connecting sleeve 500, the knob 401 and the first fixing member 402.

[0046] Replay Figure 5 On the connecting sleeve 500, the end of the tip 503 forms a flat annular table, which is defined as the first contact annular surface 505. Figure 6 , the inner cavity side of the first fixing member 402 also forms a flat annular table along the opening, which is defined as the second contact annular surface 4022. In this preferred embodiment, the ring width of the first contact annular surface 505 is set to be smaller than the ring width of the second contact annular surface 4022. The effect of this setting can be seen in Figure 7 , Figure 7 The diagram is a partial cross-sectional view showing a partial cross-sectional structure of the first fixing member when it is adapted to the connecting sleeve. As shown in the figure, when the rotating structure 400 is adapted to the connecting sleeve 500, the second contact annular surface 4022 contacts the first contact annular surface 505, and a bayonet extending along the bottom circumference of the tip is formed between the connecting sleeve 500 and the first fixing member 402. The bayonet 104 is located between the connecting sleeve 500 and the first fixing member 402. Figure 7 When the knob 401 is fitted onto the tip 503 of the connecting sleeve 500, the first fixing member 402 is tightened onto the tip 503. The end surface of the knob 401 with the through hole 4012 is located within the bayonet 104, creating a loose fit at this location. To facilitate rotation of the knob 401, a gap may be left between this end surface of the knob 401 and the bayonet. This gap provides some space for the knob 401 to rotate, allowing it to push the first fixing member 402 or the connecting sleeve 500 forward or backward in the direction of tube placement during rotational adaptation with the docking head 103.

[0047] Now let's talk about the plug-in structure 600. The plug-in structure 600 typically consists of a male and female connector assembly, with one end fitting the control handle and the other end connected to the rotating structure. Since the lens cable 102 passes through the docking connector 103, the rotating structure 400, and the connecting sleeve 500 before connecting to the plug-in male and female connectors, in this embodiment, to maintain consistency with the rotating structure 400, which does not experience relative displacement, the following further improvements have been made:

[0048] 1) The male and female connectors and the connecting sleeve 500 also form an integral structure that does not undergo relative displacement;

[0049] 2) Improve the fixing method between the male and female connectors and the control handle 300.

[0050] Figure 8 This is an exploded view showing the exploded structure of the plug-in structure. Figure 9 This is an exploded view showing the exploded structure of the plug structure at another angle. In this preferred embodiment, along the pipe placement direction, the plug structure 600 is an integrated structure formed by plugging the aviation plug female 601, the aviation plug male 602 and the second fixing member 603. Figure 10 (a) and 10(b), the two ends of the aviation plug female connector 601 are respectively a docking end and a socket end. The docking end is formed with several protruding tubes and is used to connect to the lens cable. The socket end is formed with several recessed narrow openings and is used to dock with the male connector pin. The peripheral side of the aviation plug female connector 601 forms a non-continuous external thread portion, which is defined as the third external thread 6011. Figure 2 When the plug-in structure 600 and the connecting sleeve 500 are connected, the mating end of the aviation plug female 601 extends into the inner cavity of the connecting sleeve 500 and is tightened and adapted to the first internal thread 502 in the inner cavity.

[0051] See Figure 11 This is a cross-sectional view showing the cross-sectional structure of the aviation plug female connector, aviation plug male connector, and second fixing member. The hollow arrows in the figure indicate the assembly direction of the three. One end of the aviation plug male connector 602 is formed with a socket containing pins 6021, which is used to plug into the aviation plug female connector 601. The other end forms an extension portion 6022, which includes multiple sleeves 6023 for securing to the handle cable 105. It is important to note that within the extension portion 6022, the inner wall of the male connector forms a notch 6024 with a threaded portion, which is defined as the fourth external thread 6025.

[0052] Look at the second fixing, look back Figure 8 and Figure 9 Combined with Figure 11 The second fixing member 603 is a hollow cylindrical semi-through sleeve, and a widened portion 6031 is formed at the center of the tube wall. Figure 11 In the direction of display, the side where the second fixing member 603 is fitted with the notch of the aviation plug male 602, a fourth internal thread 6032 is formed in the inner cavity, and the side where it is fitted with the control handle 300, a fifth external thread 6033 is formed on the outer wall of the tube, and a socket 6034 is formed at the bottom of the side, see Figure 11 From a cross-sectional view, the fourth internal thread 6032 and the fifth external thread 6033 are separated by the widened portion 6031, so that the second fixing member 603 forms a segmented sleeve structure. Figure 12 , Figure 12 It is a partial cross-sectional view, showing the cross-sectional structure of the plug-in structure and the control handle in a tight-fitting state. The handle cable 105 is inserted from the socket 6034 and enters the extension portion 6022 of the aviation plug male connector 602. In the tight-fitting state, the widened portion 6031 of the second fixing member 603 is located between the aviation plug male connector 602 and the control handle 300, forming a tight-fitting relationship with both of them.

[0053] At this point, the first aspect of the improvement idea of ​​the preferred embodiment of the present invention has been achieved. After the improvement in this aspect, an integrated structure consisting of a rotating structure, a plug-in mechanism and a connecting sleeve is formed in the endoscope structure, and the integrated structure is tightly matched with the control handle through a second fixing member. When the lens position needs to be adjusted, the knob is rotated to displace the adjustable threaded connection between it and the docking head. The integrated structure formed by the above structure will realize the movement in the direction of the tube placement as a whole, avoiding the repeated pulling of the fixed connection between the lens cable and the aviation plug female head. A further improvement of the present invention is to further improve the fixed connection between the lens cable and the aviation plug female head, that is, the second aspect of the improvement idea of ​​the present invention, to improve the connection between the wire core and the female head docking part, and to reinforce the wire core docking end.

[0054] The end of the lens cable cannot be directly plugged into the female aviation connector. The cable end needs to be stripped to expose the wire core inside the cable, and then the wire cores are connected to the docking end of the female connector one by one. Figure 13 The diagram is a state diagram showing the state where the lens cable and the female aviation connector are fixed at their docking ends. A plurality of thin metal inserts are formed on the docking end of the female aviation connector 601. In some preferred embodiments of the present invention, during assembly, the female aviation connector 601 is placed vertically, and the glue is dispensed to allow the glue to flow downward along the cable and to the position where the core and the docking end are fixed, completing the bonding. However, in actual assembly, it was found that it was difficult to ensure that the glue dripping from the cable could perfectly cover the connection between the core and the metal insert to form a sealant, and part of the glue would overflow to the external threaded portion of the female connector. Therefore, the embodiments of the present invention have been further improved. Figure 14 The diagram shows the assembly state of the cover structure and the aviation female connector in a preferred embodiment of the present invention. Figure 2 Combined with Figure 14 As shown, a cover structure 106 with an opening at the top (not shown) can be put on the cable, and a part of the colloid is filled in the cover structure 106. Then the female head and the cover structure 106 are buckled together to form a whole, and then the whole is inverted. In this way, the colloid will immerse the position where the wire core and the metal insert are fixed, ensuring the bonding effect while preventing the adhesive from overflowing onto the external threaded part of the female head.

[0055] The above embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An endoscope lens adjustment structure, which is composed of a rotating structure and a plug-in structure, and is used to connect the control handle of the endoscope with the cable of the endoscope lens assembly, wherein: The invention comprises a connecting sleeve, which is a semi-through body, including a tip with an opening and an external thread, and a cavity end with an internal thread. The rotating structure is docked with the tip, and a cover structure with an end of the plug-in structure is provided at the docking position of the plug-in structure and the cable. The plug-in structure and the cover structure are accommodated in the cavity end. The rotating structure is configured as follows: a rotating member abuts the connecting sleeve and the first fixing member on both sides along the rotating forward direction thereof, so that the three members form a whole, and a joint portion adapted to the endoscope cannula portion, forming an adjustable threaded connection in the rotating forward direction; the rotating member is a circular tubular semi-through member with a through hole formed at one end, and its inner cavity forms a threaded portion adapted to the joint portion; the through hole of the rotating member passes through the tip of the connecting sleeve, and the first fixing member is fitted with the tip via the threaded portion until the rotating member forms two sides of the end surface of the through hole, and is located between the connecting sleeve and the first fixing member; The plug-in structure is configured as follows: one end of the combination of the male and female aviation plugs is adapted to the control handle, and the other end is threadedly connected to the connecting sleeve, so that the connecting sleeve is docked with the rotating structure and the plug-in structure to form an integrated structure without relative displacement.

2. The endoscope lens adjustment structure according to claim 1, wherein: The connecting sleeve, the rotating structure and the plug-in structure are a multi-level structure arranged along the cable, and the cover structure is partially filled with adhesive.

3. The endoscope lens adjustment structure according to claim 2, wherein: The connecting sleeve has a terraced surface formed at the end of its tip, which is defined as a first contact annular surface. A second contact ring surface abutting against the first contact ring surface is formed on the end surface of the first fixing member that is in contact with the connecting sleeve, and the ring width of the first contact ring surface is smaller than the ring width of the second contact ring surface. When the first fixing member is fitted with the tip, the first contact ring surface and the second contact ring surface are fitted, and a bayonet extending circumferentially along the bottom of the tip is formed between the connecting sleeve and the first fixing member, and the end surface of the rotating member on which the through hole is formed is located in the bayonet.

4. The endoscope lens adjustment structure according to claim 3, wherein: In the bayonet, an adjustment gap is formed between the end surface of the rotating member and the first fixing member and / or the connecting sleeve.

5. The endoscope lens adjustment structure according to claim 3, wherein: The plug-in structure includes a male aviation plug and a female aviation plug. The male aviation plug is adapted to the control handle through a second fixing member. The cover structure is sleeved on the end of the female aviation plug. The second fixing member is configured as follows: a widened portion is formed on the outer wall of the second fixing member of the sleeve-shaped structure, and the widened portion divides the second fixing member into two ends, one end of which is inserted into the male aviation plug and locked, and the other end is inserted into the control handle and locked, wherein, The end portions of the aviation plug and the control handle are respectively in contact with two sides of the widened portion.

6. An endoscope comprising a control handle at a gripping end and an insertion end, wherein a lens assembly is inserted into the insertion end, and a lens cable of the lens assembly is connected to a handle cable in the control handle via an endoscope lens adjustment structure according to any one of claims 1 to 5, wherein: It also includes a pair of connectors, one end of which forms an interface including an external threaded portion, and the other end forms a hollow tapered portion, the insert portion is plugged and fixed to the tapered portion, the interface extends into the inner cavity of the rotating part, and forms an agreement with the threaded portion of the inner cavity of the rotating part to achieve an adjustable threaded connection between the two.

7. The endoscope according to claim 6, wherein: The lens cable passes through the rotating structure and the connecting sleeve in sequence and docks with the female aviation plug. The handle cable passes through the second fixing piece and docks with the male aviation plug.

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