CN218832725U

CN218832725U - Endoscope structure with adjustable viewing direction angle

Info

Publication number: CN218832725U
Application number: CN202221801170.6U
Authority: CN
Inventors: 舒建伟; 郭勇; 李斌; 俞增平
Original assignee: Suzhou Acuvu Medical Technology Co ltd
Current assignee: Suzhou Acuvu Medical Technology Co ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2023-04-11
Anticipated expiration: 2032-07-12

Abstract

The utility model provides a look to adjustable endoscope structure of angle, the electric iron comprises a handle, the inner tube, the outer tube, the sump, set up the apparatus inserted hole in the handle, the module of making a video recording and the signal cable that links to each other with the module of making a video recording, the inner tube distal end is the pendulum to the section, the pendulum can be swung for the central axis of inner tube in the phase, but can not rotate, the module of making a video recording is fixed in the pendulum to the section, the inner tube has first inner chamber, second inner chamber has between inner tube and the outer tube, be equipped with intake antrum and the return water chamber that each other does not communicate in the sump, there is the inhalant canal that one communicates for with the intake antrum in first inner chamber and the second inner chamber, another is the return water passageway that communicates with the return water chamber, constitute the apparatus passageway behind apparatus inserted hole and the first inner chamber intercommunication, the signal cable is arranged in the second inner chamber. When the non-0 viewing direction angle is realized, the camera module is always kept upright, so that the output image is prevented from inclining; the functional channels are combined in pairs, so that the occupation of the functional channels to the cannula space is effectively reduced, and the minimization of the cannula diameter is realized.

Description

Endoscope structure with adjustable viewing direction angle

Technical Field

The utility model relates to an endoscope technical field especially relates to an endoscope structure of visual angle adjustable.

Background

With the development of imaging devices, endoscopes have undergone innovation from fiberscope to electronic endoscope. The existing electronic endoscopes are mainly divided into two types, one type is a traditional hard tube endoscope, and an image sensor (CCD or CMOS) of the traditional hard tube endoscope is positioned at the rear end of an insertion tube; the other is a "chip-on-tip" type endoscope, with the imaging lens and image sensor located at the distal end of the cannula (sometimes also called the tip or tip). With the increasing miniaturization of imaging lenses and CMOS image sensors, the latter type of electronic endoscopes are becoming more and more common. Typically, the image sensor is integrated at the distal end of the cannula and the two are affixed together; in this way, when the insertion tube rotates, the image sensor rotates along with the insertion tube, so that the image output on the display screen is inclined, namely, when the endoscope handle is in a standing state, the Y-axis direction of the image displayed on the display screen is not a vertical direction, which can cause the problem of inconsistent hands and eyes of a doctor/operator, thereby causing misjudgment or misoperation, and the doctor can only read the head of the doctor to be askew to see the image in order to eliminate the problem, which easily causes fatigue. There are two main types of methods to solve the tilt deviation of the output image:

1. electronic image rectification: it is suitable for an endoscope in which an image sensor rotates together with an insertion tube. The method mainly measures the rotation angle of the cannula relative to the handle and the inclination angle of the handle in real time through various rotation sensors or acceleration sensors, finally obtains the rotation angle or the inclination angle of the image sensor, then carries out reverse rotation compensation on an image on a display, and rotates the displayed image to an upright position again. However, the image needs to be cut, especially a square image needs to be cut into a circle, and the size of the view field is obviously lost; also, for disposable endoscopes, the configuration of sensors and associated electronics can increase material costs and contamination.

2. Mechanical anti-rotation structure: it is suitable for an endoscope with an insertion tube having a nested structure. However, in the endoscope of the mechanical anti-rotation structure, a plurality of channels are integrated inside the inner tube: the instrument channel, the camera shooting channel, the water inlet channel and the water outlet channel lead to the difficulty in reducing the diameter of the inner tube, and the diameter of the intubation tube is not easy to reduce. Such as: when the diameter of the hysteroscope cannula is larger than 5mm, a lot of patients feel very pain when the cannula is inserted into the cervix, so doctors generally need to anaesthetize the patients; when the diameter of the hysteroscope cannula is larger than 6mm, a doctor must perform uterine dilatation operation before inserting the cannula to enlarge a cervical channel, and the uterine dilatation can cause wound and bleeding to the cervix in many times. Thus, for hysteroscope designs, the indicator of cannula being straight has been the prerequisite for the user to pewter.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an endoscope structure with adjustable viewing direction angle, which is easier to reduce the diameter of the insertion tube.

In order to realize the above-mentioned purpose, the utility model provides a look to angle adjustable endoscope structure, establish the outer tube in inner tube periphery, fix sump on the handle, set up the apparatus inserted hole in the handle, make a video recording the module and link to each other with the module of making a video recording the signal cable, the distal end of inner tube is the pendulum to the section that one section slope set up, but the pendulum can swing for the central axis of inner tube in the section distal end, the module of making a video recording is fixed at the periphery side of pendulum to the section distal end, the first inner chamber that has the axial to link up in the inner tube, the second inner chamber that has axial extension between inner tube and the outer tube, be equipped with intake antrum and the return water chamber that each other does not communicate in the sump, have one in first inner chamber and the second inner chamber for the inlet channel with the intake antrum intercommunication, another is the return water passageway with the return water chamber intercommunication, constitute the apparatus passageway after apparatus inserted hole and the first inner chamber intercommunication, the signal cable is arranged in the second inner chamber.

The preferable scheme of the technical scheme is as follows: the inner tube also comprises an inner tube body section which extends axially and straightly and a bendable semi-flexible section, the near end of the inner tube body section is fixed with the water sump, and the near end and the far end of the semi-flexible section are respectively fixed with the far end of the inner tube body section and the near end of the swing section; the outer pipe is rotatably sleeved on the periphery of the inner pipe and comprises an outer pipe body section correspondingly sleeved on the periphery of the inner pipe body section, a bending connecting section correspondingly sleeved on the periphery of the semi-flexible section and an inclined section correspondingly sleeved on the periphery of the swinging section; the inner tube body section, the swing section and the outer tube are all rigid parts.

The preferable scheme of the technical scheme is as follows: the semi-flexible section comprises a snake bone pipe body and a heat-shrinkable sleeve sleeved on the periphery of the snake bone pipe body, and the near end and the far end of the heat-shrinkable sleeve respectively extend to the inner pipe body section and the swinging section.

The preferable scheme of the technical scheme is as follows: the semi-flexible section is a flexible rubber pipe or a corrugated pipe.

The preferable scheme of the technical scheme is as follows: the inner tube body section, the swinging section and the outer tube are all stainless steel tubes.

The preferable scheme of the technical scheme is as follows: the endoscope structure also comprises a rotary dial plate which is sleeved on the periphery of the near end of the outer tube and is fixedly connected with the outer tube.

The preferable scheme of the technical scheme is as follows: the endoscope structure further comprises an adapter, the adapter is fixed on the periphery of the near end of the outer tube and fixed with the rotary drive plate, an annular axial limiting groove is formed in the outer peripheral face of the adapter, and a limiting insertion part buckled in the axial limiting groove is arranged on the handle.

The preferable scheme of the technical scheme is as follows: the endoscope structure still includes water inlet hose, return water hose and coupling hose, the near-end of first inner chamber is direct and the intake antrum intercommunication in the inner tube, water inlet hose's one end and intake antrum intercommunication, the other end are located the handle outside, coupling hose's both ends communicate with second inner chamber and return water chamber respectively, return water hose's one end and return water chamber intercommunication, the other end are located the handle outside.

The preferable scheme of the technical scheme is as follows: the endoscope structure also comprises a module bracket which is packaged at the far end port of the second inner cavity and fixed at the far end of the inner tube, and LED lamps which are arranged at two sides of the camera module, wherein the camera module and the LED lamps are fixed on the module bracket; the module bracket is provided with a first opening for exposing the far end port of the first inner cavity, and the pipe wall of the far end of the outer pipe is provided with a second opening communicated with the second inner cavity.

The preferable scheme of the technical scheme is as follows: the endoscope structure further comprises a check valve fixed in the water bin, the check valve is arranged on a path of an instrument channel, and the instrument insertion opening, the check valve and the proximal end of the first inner cavity are arranged in a manner of being opposite to each other in sequence along the central axis of the inner tube.

As described above, the endoscope structure with adjustable viewing direction angle according to the present invention has the following advantageous effects:

in the application, the swing section drives the camera module to swing relative to the central axis of the inner tube, so that the camera module changes the viewing angle, and further the non-0 viewing angle is realized, but the swing section does not rotate, so that the rotation of the camera module is limited, the camera module is always kept upright, and the output image is prevented from inclining; meanwhile, the water inlet channel is combined with the instrument channel or the camera shooting channel, the water return channel is combined with the camera shooting channel or the instrument channel, the annular cavity between the inner tube and the outer tube and the inner cavity of the inner tube are utilized, the occupation of the functional channels to the space of the insertion tube (namely the inner tube and the outer tube) can be effectively reduced, the tube diameter of the insertion tube is easier to reduce, the minimization of the tube diameter of the insertion tube is realized, and the pain of a patient is relieved when the insertion tube is inserted into a human body (such as a cervix).

Drawings

Fig. 1 is a schematic structural diagram of an endoscope structure with an adjustable viewing angle in the present application.

Fig. 2 is an enlarged view of a frame a of fig. 1.

Fig. 3 is an enlarged view of the B frame of fig. 1.

Fig. 4 is a schematic distal end view of fig. 1.

FIG. 5 is a schematic view of the distal portion of the insertion tube of the angularly adjustable endoscopic structure of the present application.

Fig. 6 is a schematic view of the internal structure of fig. 5.

Description of the element reference numerals

10. Handle (CN)

101. Instrument insertion opening

102. Limiting insertion part

20. Inner pipe

21. Swing direction section

22. A first inner cavity

23. Inner tube body section

24. Semi-flexible segment

241. Snake bone pipe

242. Thermal shrinkage sleeve

30. Outer tube

31. Second inner cavity

32. Outer tube body section

33. Curved connecting section

34. Inclined section

35. Second opening

40. Water sump

50. Camera shooting module

60. Signal cable

70. Rotary driving plate

80. Adapter

81. Axial limiting groove

90. Connecting hose

110. Module support

111. First opening

120 LED lamp

130. Check valve

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the drawings of the present application are only used to match the contents disclosed in the specification, so as to be known and read by those skilled in the art, and not to limit the practical limitations of the present invention, so that the present application does not have any technical significance, and any modification of the structure, change of the ratio relationship, or adjustment of the size should still fall within the scope of the present application without affecting the function and the achievable purpose of the present application. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are considered as the scope of the present invention without substantial changes in the technical content.

The application provides an endoscope structure with an adjustable viewing angle. For ease of description, in the embodiments described below, the end of the endoscopic structure closer to the operator is defined as the proximal end, and the end of the endoscopic structure further from the operator is defined as the distal end.

As shown in fig. 1 to 4, the endoscope structure with adjustable viewing angle of the present invention comprises a handle 10, an inner tube 20, an outer tube 30 sleeved on the outer periphery of the inner tube 20, a water tank 40 fixed on the handle 10, an instrument insertion hole 101 opened in the handle 10, a camera module 50, and a signal cable 60 connected to the camera module 50; wherein, a nested structure is arranged between the inner tube 20 and the outer tube 30, and the inner tube and the outer tube form an insertion tube of an endoscope structure, and the insertion tube is used for being inserted into a human body; a handle 10 is provided at the proximal end of the cannula; the far end of the inner tube 20 is a swing section 21 which is obliquely arranged, and the swing section 21 can swing but cannot rotate relative to the central axis of the inner tube 20; the camera module 50 is fixed on the outer peripheral side of the far end of the swinging section 21, and the camera module 50 swings with the swinging section 21 but cannot rotate; the inner tube 20 and the outer tube 30 are hollow tubes, so that a first inner cavity 22 which penetrates axially is formed in the inner tube 20, a second inner cavity 31 which extends axially is formed between the inner tube 20 and the outer tube 30, and the second inner cavity 31 is an annular inner cavity and is also part of the inner cavity of the outer tube 30; the water sump 40 is internally provided with a water inlet cavity and a water return cavity which are not communicated with each other, one of the first inner cavity 22 and the second inner cavity 31 is a water inlet channel communicated with the water inlet cavity, the other one is a water return channel communicated with the water return cavity, the instrument insertion hole 101 is communicated with the first inner cavity 22 to form an instrument channel, an instrument is directly inserted into the first inner cavity 22 of the inner tube 20 from the instrument insertion hole 101, and the signal cable 60 is arranged in the second inner cavity 31.

In the above-mentioned endoscope structure with adjustable viewing angle, when the tilt section 21 that sets up swings for the central axis of inner tube 20, the swing section 21 drives the module of making a video recording 50 and swings together, then the direction of observation of the module of making a video recording 50 changes along a circular cone cycloid direction, make the module of making a video recording 50 change the viewing angle, and then realize the viewing angle that is not 0, but the swing section 21 does not rotate, just restrict the rotation of the module of making a video recording 50, make the module of making a video recording 50 keep upright all the time, avoid the output image of the module of making a video recording 50 to take place the slope. Therefore, the present application not only realizes a non-0 viewing angle, but also avoids the output image of the camera module 50 from tilting. And, when the first lumen 22 is used as a water inlet channel, the first lumen 22 is also used as an instrument channel, so that the water inlet channel is merged with the instrument channel; and the second inner cavity 31 is used as a water return channel, and the second inner cavity 31 is also used for arranging the signal cable 60 and is used as a camera shooting channel, so that the water return channel and the camera shooting channel are combined. Or, when the first inner cavity 22 is used as a water return channel, the water return channel is combined with the instrument channel; and the second inner cavity 31 is used as a water inlet channel, the water inlet channel and the camera shooting channel are combined. Therefore, this application merges four function channels of endoscope structure two by two to utilize the inner tube 20 of hollow tube structure and the interior cavity of inner tube 20 self between outer tube 30, the maximize effectively is used as each function channel to the cross sectional area of intubate, and then effectively reduces each function channel and to the occupation in intubate space, changes the pipe diameter that reduces the intubate, realizes the minimizing of intubate pipe diameter, thereby alleviates patient's misery when the intubate inserts human tissues such as cervix.

In this embodiment, the first inner cavity 22 is a water inlet channel, and the second inner cavity 31 is a water return channel.

Further, the present application realizes that the swinging section 21 can swing but cannot rotate relative to the central axis of the inner tube 20, and the preferable structure is as follows: as shown in fig. 1, 2 and 6, the inner tube 20 further includes an inner tube body section 23 extending straight and axially, and a bendable semi-flexible section 24, a proximal end of the inner tube body section 23 is fixed to the water sump 40, so that the inner tube 20 cannot rotate around its axis, and the inner tube 20 is restricted from rotating, and a proximal end and a distal end of the semi-flexible section 24 are fixed to a distal end of the inner tube body section 23 and a proximal end of the swing section 21, respectively, and the fixing manner may be adhesive fixing; the outer tube 30 is rotatably sleeved on the periphery of the inner tube 20, the outer tube 30 comprises an outer tube body section 32 correspondingly sleeved on the periphery of the inner tube body section 23, a bending connecting section 33 correspondingly sleeved on the periphery of the semi-flexible section 24, and an inclined section 34 correspondingly sleeved on the periphery of the swinging section 21, and the outer tube body section 32, the bending connecting section 33 and the inclined section 34 are sequentially connected; the inner tubular body section 23, the yaw section 21 and the outer tube 30 are rigid members, and the curved connecting section 33 of the outer tube 30 forces the semi-flexible section 24 into a curved state. Preferably, the inner tubular body section 23, the yaw section 21 and the outer tube 30 are stainless steel tubes.

When the outer tube 30 rotates around the central axis of the inner tube 20, the inner tube 20 does not rotate under the restriction of the water sump 40, but because the outer tube 30 is rigid, under the action of the distal semi-flexible section 24 of the inner tube 20, the inclined section 34 at the distal end of the outer tube 30 forces the semi-flexible section 24 of the inner tube 20 to bend and the swinging section 21 of the inner tube 20 to swing, the swinging track of the swinging section 21 moves along a conical cycloid direction, and the swinging section 21 drives the camera module 50 to swing around the central axis of the inner tube 20 but does not rotate, so that the camera module 50 moves along a conical cycloid direction in the rotation process of the outer tube 30, but always keeps upright, the viewing angle of the camera module 50 is changed, and the output image of the camera module 50 is prevented from tilting. This application has realized that the endoscope direction of vision angle is adjustable through pure mechanical mode, can keep making a video recording upright of module 50 all the time simultaneously, also keep making a video recording upright of module 50's output image, compare in prior art and carry out the scheme that the image slope was corrected through electronic sensor, this application need not tailor the image, therefore same module 50 of making a video recording can realize bigger visual field, and, to disposable endoscope, electronic sensor and relevant electron material have also been saved to this application, material cost is reduced, pollution is reduced.

Preferably, semi-compliant segment 24 is capable of deflecting in various directions, which can be accomplished in a variety of ways. Such as: as shown in fig. 6, the semi-flexible segment 24 includes a snake bone pipe 241 and a heat-shrinkable sleeve 242 covering the periphery of the snake bone pipe 241, the snake bone pipe 241 is formed by processing a thin steel pipe into a snake bone structure, the proximal end and the distal end of the heat-shrinkable sleeve 242 respectively extend to the inner pipe body segment 23 and the swing segment 21, and the heat-shrinkable sleeve 242 plays a role of preventing water leakage. For another example: the semi-flexible section 24 is a flexible rubber tube or bellows.

Further, as shown in fig. 1, the endoscope structure further includes a rotary dial 70, the rotary dial 70 is sleeved on the outer circumference of the proximal end of the outer tube 30 and is fixedly connected with the outer tube 30, and the operator can conveniently make the outer tube 30 rotate around the shaft by rotating the dial 70. The fixing structure between the rotary dial 70 and the outer tube 30 is preferably: as shown in fig. 1 and 2, the endoscope structure further includes an adaptor 80, the adaptor 80 is adhered and fixed on the outer periphery of the proximal end of the outer tube 30, and the distal end of the adaptor 80 is fixed with the rotary dial 70 by screws, thereby fixing the rotary dial 70 and the outer tube 30; furthermore, a circle of annular axial limiting groove 81 is formed in the outer peripheral surface of the adaptor 80, a limiting insertion part 102 which is buckled in the axial limiting groove 81 is arranged on the handle 10, and the axial movement of the adaptor 80 is limited by buckling the limiting insertion part 102 and the axial limiting groove 81, so that the axial movement of the outer pipe 30 is also limited, and the rotary dial 70 can drive the outer pipe 30 to rotate but cannot move axially through the adaptor 80. In the present embodiment, the rotary dial 70 is distributed on the distal end sides of the handle 10 and the sump 40; of course, in other embodiments, the rotary dial 70 may also be disposed on the proximal side of the sump 40, with the rotary dial 70 being closer to the operator, facilitating the operator to wave the rotary dial 70 with his thumb.

Further, as shown in fig. 1 and 2, the endoscope structure further includes a water inlet hose, a water return hose, and a connection hose 90, wherein a proximal end of the first inner cavity 22 in the inner tube 20 is directly communicated with the water inlet cavity, one end of the water inlet hose is communicated with the water inlet cavity, the other end of the water inlet hose is located outside the handle 10, two ends of the connection hose 90 are respectively communicated with the second inner cavity 31 and the water return cavity, one end of the water return hose is communicated with the water return cavity, and the other end of the water return hose is located outside the handle 10. External inlet water flows into the water inlet cavity of the water sump 40 through the water inlet hose and then directly flows into the water inlet channel formed by the first inner cavity 22; the backwater flows back to the backwater cavity of the water sump 40 along the insertion tube and the connecting hose 90 after entering the backwater channel formed by the second inner cavity 31, and then flows out of the endoscope through the backwater hose. The endoscope structure further includes a check valve 130 fixed in the water chamber 40, the check valve 130 is disposed on a path of the instrument channel, and proximal ends of the instrument insertion port 101, the check valve 130 and the first lumen 22 are sequentially disposed opposite to each other along a central axis of the inner tube 20 in a proximal-to-distal direction. When it is desired to use the instrument, the operator inserts the instrument into the endoscope through the instrument insertion port 101, and during the insertion process, the instrument passes through the check valve 130 in the water chamber 40 and then enters the water inlet passage in the inner tube 20.

Further, the preferred structure of the camera module 50 integrated at the distal end of the insertion tube is: as shown in fig. 5 and 6, the endoscope structure further includes a module support 110 encapsulated at the distal end port of the second lumen 31 and fixed at the distal end of the inner tube 20, and LED lamps 120 arranged at both sides of the camera module 50, the module support 110 is a plastic support, is fixed at the distal end of the inner tube 20 by gluing, and blocks the distal end port of the second lumen 31, the camera module 50 and the LED lamps 120 are both fixed on the module support 110 by gluing, and the camera module 50 and the LED lamps 120 swing together with the swing section 21 at the distal end of the inner tube 20; the signal cable 60 of the camera module 50 is routed along the water return channel. The module bracket 110 is provided with a first opening 111 for exposing the distal end port of the first inner cavity 22, the first opening 111 is a water inlet, and the inlet water in the water inlet channel flows out through the first opening 111. The pipe wall of the far end of the outer pipe 30 is provided with a second opening 35 communicated with the second inner cavity 31, the second opening 35 is a water return port and is arranged on the side surface of the outer pipe 30, and return water enters a water return channel between the inner pipe 20 and the outer pipe 30 through the second opening 35.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. An endoscope structure with adjustable viewing direction angle, which is characterized in that: including handle (10), inner tube (20), cover establish outer tube (30) in inner tube (20) periphery, fix sump (40) on handle (10), set up instrument inserted hole (101) in handle (10), make a video recording module (50) and with make a video recording signal cable (60) that module (50) link to each other, the distal end of inner tube (20) sets up for one section slope pendulum to section (21), but the pendulum can not rotate to section (21) for the central axis of inner tube (20) wobbling, make a video recording module (50) are fixed in the periphery side of pendulum to section (21) distal end, have axial through-going first inner chamber (22) in inner tube (20), have axial extension's second inner chamber (31) between inner tube (20) and outer tube (30), be equipped with the intake antrum and the return water chamber that each other does not communicate in sump (40), one has in first inner chamber (22) and the second inner chamber (31) and is for the return water passageway that communicates with the intake antrum, the return water passageway that communicates with first inner chamber (101) and first inner chamber (22) and second inner chamber (31) rear signal cable (31) are arranged in the second inner chamber (31).

2. An angularly adjustable endoscope construction according to claim 1 and also characterized in that: the inner pipe (20) further comprises an inner pipe body section (23) which extends axially and straightly, and a bendable semi-flexible section (24), the proximal end of the inner pipe body section (23) is fixed with the water sump (40), and the proximal end and the distal end of the semi-flexible section (24) are respectively fixed with the distal end of the inner pipe body section (23) and the proximal end of the swing section (21); the outer pipe (30) is rotatably sleeved on the periphery of the inner pipe (20), and the outer pipe (30) comprises an outer pipe body section (32) correspondingly sleeved on the periphery of the inner pipe body section (23), a bending connecting section (33) correspondingly sleeved on the periphery of the semi-flexible section (24), and an inclined section (34) correspondingly sleeved on the periphery of the swinging section (21); the inner tube body section (23), the pendulum direction section (21) and the outer tube (30) are all rigid members.

3. An angularly adjustable endoscope construction according to claim 2 and also characterized in that: the semi-flexible section (24) comprises a snake bone pipe body (241) and a heat-shrinkable sleeve (242) sleeved on the periphery of the snake bone pipe body (241), and the near end and the far end of the heat-shrinkable sleeve (242) respectively extend to the inner pipe body section (23) and the swinging section (21).

4. An angularly adjustable endoscope construction according to claim 2 and also characterized in that: the semi-flexible section (24) is a flexible rubber tube or a corrugated tube.

5. An angularly adjustable endoscope construction according to claim 2 and also characterized in that: the inner pipe body section (23), the swinging section (21) and the outer pipe (30) are all stainless steel pipes.

6. An angularly adjustable endoscope construction according to claim 2 and also characterized in that: the outer tube is characterized by further comprising a rotary dial (70), wherein the rotary dial (70) is sleeved on the periphery of the near end of the outer tube (30) and is fixedly connected with the outer tube (30).

7. An angularly adjustable endoscope construction according to claim 6 and also characterized in that: the handle is characterized by further comprising an adapter (80), wherein the adapter (80) is fixed to the periphery of the near end of the outer pipe (30) and fixed to the rotary driving plate (70), an annular axial limiting groove (81) is formed in the outer peripheral surface of the adapter (80), and a limiting insertion part (102) buckled in the axial limiting groove (81) is formed in the handle (10).

8. An angularly adjustable endoscope construction according to claim 2 and also characterized in that: still include water inlet hose, return water hose and coupling hose (90), the near-end of first inner chamber (22) is direct and the intake antrum intercommunication in inner tube (20), water inlet hose's one end and intake antrum intercommunication, the other end are located handle (10) outside, coupling hose's (90) both ends communicate with second inner chamber (31) and return water chamber respectively, return water hose's one end and return water chamber intercommunication, the other end are located handle (10) outside.

9. An angularly adjustable endoscope construction according to claim 1 and also characterized in that: the camera module further comprises a module bracket (110) which is packaged at the far end port of the second inner cavity (31) and fixed at the far end of the inner tube (20), and LED lamps (120) which are arranged at two sides of the camera module (50), wherein the camera module (50) and the LED lamps (120) are fixed on the module bracket (110); the module support (110) is provided with a first opening (111) exposed from a far end port of the first inner cavity (22), and the pipe wall of the far end of the outer pipe (30) is provided with a second opening (35) communicated with the second inner cavity (31).

10. An angularly adjustable endoscope construction according to claim 1 and also characterized in that: the medical instrument further comprises a check valve (130) fixed in the water bin (40), the check valve (130) is arranged on the path of the instrument channel, and the proximal ends of the instrument insertion opening (101), the check valve (130) and the first inner cavity (22) are arranged along the central axis of the inner tube (20) in a manner of being opposite to each other in sequence.