Endoscope head end and endoscope

Abstract

The present invention provides an endoscope head end and an endoscope, the endoscope head end having a first observation window and a second observation window provided adjacent to each other on the tip surface of the endoscope head end, and a nozzle provided on the perpendicular bisector of a connecting line connecting the center of the first observation window and the center of the second observation window, the first side wall and the second side wall of the nozzle are located on the two sides of the perpendicular bisector, the distance between the first side wall and the second side wall is gradually increased when the nozzle gets close to the connecting line, and the upper wall of the nozzle is provided with a protruding part protruding towards the direction of the connecting line relative to the first side wall and the second side wall. The protruding part is located in an area outside the visual field range of the endoscope between the first observation window and the second observation window, and the top end, with the shortest distance from the connecting line, of the protruding part is located on the perpendicular bisector. According to the present invention, when the observation windows of two optical systems are cleaned using one nozzle, the nozzle can efficiently clean the first observation window and the second observation window without appearing in the field of view of the optical systems.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to an endoscope head end and an endoscope. Background Art

[0002] In recent years, stereo endoscopes that capture stereo images of areas to be inspected have become popular. Such stereo endoscopes generally include a first imaging unit and a second imaging unit, which are respectively arranged on the head end of the insertion portion of the endoscope, and capture images of the area to be inspected through first and second observation windows installed on the top end surface of the head end.

[0003] In an endoscope system, a stereo endoscope is usually connected to an external device that repeatedly displays a first observation image obtained by a first camera and a second observation image obtained by a second camera on a monitor. An observer observes the first observation image and the second observation image repeatedly displayed on the monitor through dedicated stereo vision glasses in a manner that the observer observes only the first observation image with one eye and only the second observation image with the other eye. Thus, the observer can view a 3D image of the area to be inspected in the object.

[0004] Miniaturization of the end of the endoscope head has always been a goal pursued in this field. However, due to the special characteristics of the two camera parts of the stereo endoscope, miniaturization of the end of the stereo endoscope head has always been very difficult. In addition, when the observation windows of the two camera parts are in the body, water droplets and foreign matter need to be removed by nozzles to ensure clear images, which will further increase the size of the end of the stereo endoscope head.

[0005] Therefore, an endoscope with a single nozzle has been developed. For example, in patent document CN114938939A, one nozzle is used to clean two optical systems. In this patent document, a nozzle portion is arranged facing the first optical system and the second optical system in an inclined direction relative to the bisector of the first optical system and the second optical system. As a result, the path (the vertical path of the left eye image and the vertical path of the right eye image) can be shortened, and the time for water droplets, dirt, etc. to pass can be shortened.

[0006] However, in patent document CN114938939A, the first optical system, the second optical system, the first lighting unit and the second lighting unit are arranged at the upper part of the end face of the head end, the nozzle part and the first channel (instrument channel) are arranged at the lower part of the end face of the head end, and the nozzle part is far away from the first optical system and the second optical system, so there is a situation that the first optical system and the second optical system cannot be cleaned. However, if the nozzle part is close to the first optical system and the second optical system, there is a concern that the nozzle will appear in the field of view of the optical system. Summary of the invention

[0007] In this regard, in order to solve at least one problem existing in the above-mentioned prior art, the present invention proposes an endoscope head end and an endoscope, the purpose of which is that when using one nozzle to clean the observation windows of two optical systems, the nozzle can efficiently clean the first observation window and the second observation window without appearing in the field of view of the optical system.

[0008] In order to achieve the above-mentioned purpose, one embodiment of the present invention is an end of an endoscope head, comprising: a first observation window and a second observation window, the second observation window and the first observation window being arranged adjacent to the top end surface of the endoscope head; a nozzle, which is arranged on the perpendicular bisector of the connecting line connecting the center of the first observation window and the center of the second observation window, the nozzle having a first side wall, a second side wall, and an upper wall and a lower wall connected to the first side wall and the second side wall, the first side wall and the second side wall being located on both sides of the perpendicular bisector, the distance between the first side wall and the second side wall gradually increases as approaching the connecting line, the upper wall having a protrusion protruding in the direction of the connecting line relative to the first side wall and the second side wall, the protrusion being located in an area outside the field of view of the endoscope between the first observation window and the second observation window, and the top of the protrusion with the shortest distance from the connecting line being located on the perpendicular bisector.

[0009] Preferably, the end surface of the protrusion facing the connecting line has a curved surface portion, a first planar portion and a second planar portion, the curved surface portion connects the first planar portion and the second planar portion, the first planar portion is connected to the first side wall, and the second planar portion is connected to the second side wall.

[0010] Preferably, when the first plane portion moves to the first observation window along a straight line perpendicular to the first plane portion, it is tangent to the first observation window, and when the second plane portion moves to the second observation window along a straight line perpendicular to the second plane portion, it is tangent to the second observation window.

[0011] Preferably, an instrument channel is further provided at the end of the endoscope head, the instrument channel and the nozzle are located on both sides of the first line segment, and the opening center of the instrument channel is located on the mid-perpendicular line.

[0012] Preferably, the end of the endoscope head is further provided with a plurality of lighting parts, and the two sides of the perpendicular midline have the same number of the lighting parts.

[0013] Preferably, the multiple lighting units include a first lighting unit, a second lighting unit, a third lighting unit and a fourth lighting unit, the first lighting unit and the second lighting unit are located on the same side of the first observation window relative to the perpendicular bisector, the third lighting unit and the fourth lighting unit are located on the same side of the perpendicular bisector as the second observation window, the first lighting unit and the third lighting unit are located on the same side of the nozzle relative to the first line segment, and the second lighting unit and the fourth lighting unit are located on the opposite side of the nozzle relative to the first line segment.

[0014] Preferably, the distance between the center of the first lighting unit and the center of the first observation window is 0.5-1.5 times the distance between the center of the second lighting unit and the center of the first observation window, the distance between the center of the third lighting unit and the center of the second observation window is 0.5-1.5 times the distance between the center of the fourth lighting unit and the center of the second observation window, and the distance between the center of the second lighting unit and the center of the fourth lighting unit is 1-2 times the distance between the center of the first lighting unit and the center of the third lighting unit.

[0015] Preferably, a mounting hole for mounting the nozzle is provided at the end of the endoscope head portion, a connecting tube is fixed on the side of the mounting hole opposite to the nozzle, the connecting tube is composed of a first connecting tube and a second connecting tube which are connected to each other, the first connecting tube is fixed in the mounting hole and connected to the mounting hole, the second connecting tube is fixed to and connected to a fluid tube which supplies fluid to the nozzle, and an angle of 160° to 175° is formed between the first connecting tube and the second connecting tube.

[0016] Preferably, the end of the endoscope head has an embedded portion embedded in the interior of the nozzle, the embedded portion abuts against the side of the lower wall, the lower surface of the first side wall and the lower surface of the second side wall, and the embedded portion, the upper wall, the lower wall, the first side wall and the second side wall constitute the fluid outlet channel of the nozzle.

[0017] Another embodiment of the present invention is an endoscope having any one of the endoscope head ends described above.

[0018] According to the endoscope head end and the endoscope of the present invention, the nozzle is arranged at a central position adjacent to the first observation window and the second observation window, and the distance between the first side wall and the second side wall of the nozzle gradually increases as approaching the connecting line (i.e., the first observation window and the second observation window), so that one nozzle can be used to clean the two observation windows, and the nozzle, the first observation window and the second observation window can be compactly arranged, thereby improving the space utilization of the endoscope head end and contributing to the miniaturization of the endoscope head end. Furthermore, the upper wall of the nozzle has a protrusion which protrudes toward the first observation window and the second observation window relative to the first side wall and the second side wall, the protrusion is located in an area outside the field of view of the endoscope between the first observation window and the second observation window, and the top of the protrusion which is the shortest distance from the connecting line is located on the perpendicular midline, so that the nozzle can be as close to the first observation window and the second observation window as possible through the protrusion, and can efficiently flush the first observation window and the second observation window at a close distance, thereby avoiding the situation where the first observation window and the second observation window cannot be cleaned thoroughly; and the top of the protrusion which is the shortest distance from the connecting line is located on the perpendicular midline of the connecting line between the centers of the first observation window and the second observation window, so that the protrusion can avoid the field of view of the first optical system and the second optical system, and even if the protrusion of the nozzle is very close to the first observation window and the second observation window, it will not enter the field of view of the first optical system and the second optical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the end portion of the endoscope head involved in the present invention.

[0021] Figure 2 It is a schematic diagram of the nozzle involved in the present invention.

[0022] Figure 3 Bottom view of the nozzle (hidden pipe part) involved in the present invention

[0023] Figure 4 It is a cross-sectional view of the end portion of the endoscope head of the present invention.

[0024] Figure 5 for Figure 4 Magnified view of area A in FIG.

[0025] Figure 6 It is a schematic diagram of the layout of the observation window and the lighting unit in the end of the endoscope head of the present invention.

[0026] Figure 7 It is a schematic diagram of a modified example of the nozzle involved in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 1. Head end; 11. Embedding portion; 12. Guide surface; 2a. First observation window; 2b. Second observation window; 3. 3' nozzle; 31. Nozzle portion; 311. First side wall; 312. Second side wall; 313. Upper wall; 314. Lower wall; 315. Protrusion; 316. Arc portion; 317. First plane portion; 318. Second plane portion; 319. Partition wall; 32. Pipe portion; 4. Instrument channel; 5a. First lighting portion; 5b. Second lighting portion; 5c. Third lighting portion; 5d. Fourth lighting portion; 6. Second channel; 7. Connecting tube; 71. First connecting tube; 72. Second connecting tube; 8. Rope threading hole; 9. Fluid tube. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the technical solutions of the present disclosure are clearly and completely described below in conjunction with the drawings in the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0030] Figure 1 It is a schematic diagram of the end portion of the endoscope head involved in the present invention.

[0031] like Figure 1 As shown, on the top end surface of the endoscope lens end 1, there are provided the first observation window 2a, the second observation window 2b, the nozzle 3, the instrument channel 4, the first lighting part 5a, the second lighting part 5b, the third lighting part 5c, the fourth lighting part 5d, the second channel 6 and other head end components.

[0032] The first observation window 2a and the second observation window 2b are adjacently arranged on the top surface of the endoscope head end 1. Thus, the position difference of the inspection area photographed through the first observation window 2a and the second observation window 2b is small, which can reduce the burden of image processing and obtain excellent 3D effect.

[0033] like Figure 1 As shown, a connecting line connecting the center of the first observation window 2a and the center of the second observation window 2b is called a first line segment W1, and the nozzle 3 is arranged on a perpendicular bisector W2 of the first line segment W1.

[0034] In this way, the nozzle 3 is arranged in a central position adjacent to the first observation window 2a and the second observation window 2b, so that the nozzle 3, the first observation window 2a and the second observation window 2b can be compactly arranged, thereby improving the space utilization of the endoscope head end and contributing to the miniaturization of the endoscope head end.

[0035] In addition, such a compact arrangement of the nozzle 3, the first observation window 2a and the second observation window 2b can provide more arrangement space for other head end components. For example, a larger instrument channel 4 can be provided, and more lighting parts can be provided to improve the lighting effect and facilitate the doctor's operation.

[0036] Next, refer to Figure 2 as well as Figure 3 , the nozzle 3 in this embodiment is described in detail.

[0037] like Figure 2 As shown, the nozzle 3 can be divided into a nozzle portion 31 and a pipeline portion 32. The nozzle portion 31 has a first side wall 311, a second side wall 312, an upper wall 313, and a lower wall 314. The upper wall 313 and the lower wall 314 are connected with the first side wall 311 and the second side wall 312 to form a fluid channel of the nozzle portion 31. The lower wall 314 of the nozzle 3 is fixed on the pipeline portion 32, and the opening of the pipeline portion 32 is connected with the fluid channel of the nozzle portion 31.

[0038] The first side wall 311 and the second side wall 312 of the nozzle 3 are in contact with the top surface of the endoscope head end 1. The first side wall 311 and the second side wall 312 are located on both sides of the perpendicular midline W2. The distance between the first side wall 311 and the second side wall 312 gradually increases as it approaches the first line segment W1. Figure 1 As shown, the nozzle 3 has a trumpet shape whose opening becomes larger as it approaches the first observation window 2a and the second observation window 2b. In this way, the fluid ejected through the nozzle 3 becomes wider as it approaches the first observation window 2a and the second observation window 2b, and can completely cover the surfaces of the first observation window 2a and the second observation window 2b, so that the first observation window 2a and the second observation window 2b can be cleaned by one nozzle 3.

[0039] In addition, if Figure 2 As shown, the upper wall 313 also has a protrusion 315. The protrusion 315 protrudes in the direction of the first line segment W1 relative to the first side wall 311 and the second side wall 312, and the protrusion 315 is located in the area outside the field of view of the endoscope between the first observation window 2a and the second observation window 2b, and the top of the protrusion 315 with the shortest distance from the first line segment W1 is located on the perpendicular midline W2. In this way, the nozzle 3 can be as close to the first observation window 2a and the second observation window 2b as possible through the protrusion 315 of the upper wall 313 without entering the field of view of the endoscope.

[0040] This is because the field of view of the endoscope, that is, the field of view of the imaging element behind the first observation window 2a and the second observation window 2b, gradually expands outward from the top surface of the first observation window 2a and the second observation window 2b along the axial direction of the tip end, and there is an area between the first observation window 2a and the second observation window 2b that is not in the field of view. Therefore, even if the protrusion 315 of the upper wall 313 is provided in this area, the protrusion 315 will not appear in the field of view of the endoscope. On the other hand, the top of the protrusion 315 with the shortest distance from the first line segment W1 is located on the perpendicular bisector W2, so the protrusion 315 can be as close to the first observation window 2a and the second observation window 2b as possible.

[0041] Therefore, according to the present invention, the first observation window 2a and the second observation window 2b can be cleaned simultaneously by one nozzle 3, and the protrusion 315 is provided to be as close to the first observation window 2a and the second observation window 2b as possible, thereby increasing the distance at which the fluid is constrained in the nozzle 3 and reducing the distance between the fluid and the first observation window 2a and the second observation window 2b after the fluid is ejected from the nozzle 3. Therefore, even if the fluid ejected through the nozzle 3 is closer to the first observation window 2a and the second observation window 2b and has a wider width, the cleaning effect can be ensured. Therefore, when one nozzle 3 is used to clean the observation windows of two optical systems, the nozzle 3 can efficiently clean the first observation window 2a and the second observation window 2b without appearing in the field of view of the optical system.

[0042] In addition, the shape of the protrusion 315 can be determined according to the field of view of the endoscope, and is not limited in the present invention.

[0043] For example, Figure 3 As shown, the end surface of the protrusion 315 facing the first line segment W1 can be divided into an arc portion 316, a first plane portion 317 and a second plane portion 318, the arc portion 316 is connected to the first plane portion 317 and the second plane portion 318, the first plane portion 317 is connected to the first side wall 311, and the second plane portion 318 is connected to the second side wall 312.

[0044] Therefore, by forming the various parts of the protrusion 315 into different shapes, especially forming the part of the end face of the protrusion 315 close to the side wall of the nozzle 3 into a plane, and forming the part located on the midpoint perpendicular line W2 into an arc surface, the protrusion 315 can be further approached to the first observation window 2a and the second observation window 2b without appearing in the field of view of the endoscope, thereby further improving the cleaning effect.

[0045] Furthermore, when the first plane portion 317 moves to the first observation window 2a along a straight line perpendicular to the first plane portion 317, it is tangent to the first observation window 2a, and when the second plane portion 318 moves to the second observation window 2b along a straight line perpendicular to the second plane portion 318, it is tangent to the second observation window 2b.

[0046] Therefore, when the fluid breaks away from the constraints of the nozzle 3 and is sprayed toward the first observation window 2a and the second observation window 2b, the fluid can reach the first observation window 2a and the second observation window 2b from the shortest path, which can reduce the loss of fluid flow rate and flow rate, thereby further improving the cleaning effect.

[0047] In addition, if Figure 3 As shown, the first side wall 311 and the second side wall 312 protrude relative to the lower wall 314 toward the outlet direction of the nozzle 3. That is, the lengths of the first side wall 311 and the second side wall 312 are longer than the lower wall 314.

[0048] Therefore, when the nozzle 3 in this embodiment is installed on the end portion 1 of the endoscope head, Figure 4 , Figure 5 As shown, an embedding portion 11 is formed on the end portion of the endoscope head 1. When the nozzle 3 is mounted on the end portion of the endoscope head 1, the embedding portion 11 is embedded in the nozzle 3, abutting against the side surface of the lower wall 314, the lower surface of the first side wall 311, and the lower surface of the second side wall 312, and the top surface of the embedding portion 11 and the top surface of the lower wall 314 are located in the same plane. In this way, the first side wall 311, the second side wall 312, the upper wall 313, the lower wall 314, and the embedding portion 11 form a fluid channel of the nozzle 3. When the fluid injection ends, the excess fluid can flow back to the pipe portion 32 from the endoscope head end 1 through the fluid channel, so that water accumulation near the nozzle can be prevented.

[0049] Here, the endoscope head end 1 includes a head end cap ( Figure 4 The dark part on the left in the figure) and the main body ( Figure 4 The end cap is fixed to the main body to form the end of the endoscope head 1. Of course, the end of the endoscope head 1 may also not have the end cap, but only have the main body. Figure 4 The left side of Figure 5 The upper direction is the upward direction, Figure 4 The right side of Figure 5 The lower side in the figure is the downward direction.

[0050] like Figure 4 As shown, the end of the endoscope head 1 is provided with a mounting hole for mounting the nozzle 3, and the side of the mounting hole opposite to the nozzle 3 ( Figure 4 The connecting tube 7 is fixed on the right side of the endoscope head 1. The connecting tube 7 is composed of a first connecting tube 71 and a second connecting tube 72 that are connected to each other. The first connecting tube 71 is fixed in the mounting hole of the end of the endoscope head 1 and is connected to the mounting hole. The second connecting tube 72 is fixed to and connected to the fluid tube 9 that supplies fluid to the nozzle 3. The first connecting tube 71 and the second connecting tube 72 have an angle of 160° to 175°.

[0051] That is, the portion of the connecting tube 7 exposed from the mounting hole of the endoscope lens end 1 (the second connecting tube 72) is inclined toward the radial inner side of the endoscope lens end 1 relative to the portion of the connecting tube 7 located in the mounting hole of the endoscope lens end 1 (the first connecting tube 71), so that the position of the fluid tube 9 fixedly connected to the second connecting tube 72 is close to the radial inner side of the endoscope lens end 1, and can avoid the parts that cannot change the position such as the rope threading hole 8 and the snake bone rivet on the radial outer side, which can improve the convenience of endoscope assembly and improve production efficiency. On the other hand, the mounting hole on the endoscope lens end 1 can be set as far as possible on the radial outer side of the endoscope lens end 1 without worrying about the interference of the rope threading hole 8 and the like on the connecting tube 7, and can provide sufficient installation space for other components of the endoscope lens end 1.

[0052] The connecting pipe 7 may be formed by a first connecting pipe 71 and a second connecting pipe 72 which are independent of each other and fixed by welding or the like, or may be formed by bending a single pipe.

[0053] Furthermore, if Figure 5 As shown, the top surface of the first observation window 2a and the top surface of the second observation window 2b are higher than the top surface of the embedded portion 11, and the top surface of the endoscope head end 1 has a guide surface 12, which guides the fluid ejected from the nozzle 3 to the top surface of the first observation window 2a and the top surface of the second observation window 2b. The guide surface 12 is arranged between the embedded portion 11 and the first observation window 2a and the second observation window 2b, and the starting part is flush with the lower edge of the nozzle, and gradually tilts and rises to be flush with the top surface of the first observation window 2a and the second observation window 2b. In this way, the fluid can be guided to be ejected to the first observation window 2a and the second observation window 2b, and the first observation window 2a and the second observation window 2b can be effectively cleaned.

[0054] Furthermore, the cross-sectional area of ​​the nozzle portion 31 of the nozzle 3 is smaller than the cross-sectional area of ​​the pipeline portion 32, that is, the fluid passage of the nozzle portion 31 is narrowed relative to the fluid passage of the pipeline portion 32. In this way, the fluid energy at the nozzle portion 31 is concentrated, the pressure is increased, and the flow rate is increased, so that the first observation window 2a and the second observation window 2b can be effectively cleaned.

[0055] Furthermore, the nozzle 3 may have a symmetrical shape with the perpendicular midline W2 of the first line segment W1 as the symmetry axis. Therefore, the nozzle 3 has the same cleaning distance as the first observation window 2a and the second observation window 2b, and the first observation window 2a and the second observation window 2b can be cleaned with the same high efficiency by one nozzle 3, and the first optical imaging component and the second optical imaging component can be cleaned at the same time, thus satisfying the "simultaneity" of cleaning.

[0056] Furthermore, the plane where the first side wall 311 is located is tangent to the outer periphery of the first observation window 2a at the first intersection where the extension line of the first line segment W1 intersects with the outer periphery of the first observation window 2a, and the plane where the second side wall 312 is located is tangent to the outer periphery of the second observation window 2b at the second intersection where the extension line of the first line segment W1 intersects with the outer periphery of the second observation window 2b. Thus, it is possible to ensure that the fluid ejected through the nozzle 3 completely covers the surfaces of the first observation window 2a and the second observation window 2b.

[0057] The end of the endoscope head 1 is also provided with an instrument channel 4. Figure 1 As shown, in this embodiment, the instrument channel 4 is located on the side of the first line segment W1 opposite to the nozzle 3, and the center of the opening of the instrument channel 4 is located on the perpendicular midline W2. Further, the instrument channel 4 has a symmetrical shape with the perpendicular midline W2 as the symmetry axis.

[0058] Therefore, in this embodiment, the nozzle 3 and the instrument channel 4, two relatively large head end components, are arranged on both sides of the first observation window 2a and the second observation window 2b, which can reduce the space waste on the top end surface of the head end and further improve the space utilization rate of the top end surface of the head end. In addition, the center of the opening of the instrument channel 4 is located on the mid-perpendicular line W2, and is arranged adjacent to the first observation window 2a and the second observation window 2b ( Figure 1 The instrument extending from the instrument channel 4 is photographed through the first observation window 2a and the second observation window 2b, with only a difference in shooting angles, thereby providing an excellent 3D image effect when the doctor operates the instrument.

[0059] In addition, the instrument channel 4 is arranged in a central position adjacent to the first observation window 2a and the second observation window 2b with the midline W2 as the axis of symmetry. The doctor can also close the camera element behind the first observation window 2a or the camera element behind the second observation window 2b according to operating habits, thereby realizing operations under 2D images.

[0060] The end of the endoscope head 1 is also provided with a plurality of lighting units. Figure 1 The first lighting unit 5a, the second lighting unit 5b, the third lighting unit 5c and the fourth lighting unit 5d are shown in the figure. However, in the present embodiment, the number of lighting units may be 6 or other numbers. The plurality of lighting units are symmetrically arranged with the midline W2 as the symmetry axis. Here, the symmetrical arrangement may be that the number of lighting units is symmetrically arranged with the midline W2 as the symmetry axis (i.e., in Figure 1 The number of lighting units on the left and right sides of the perpendicular midline W2 is the same), or the positions of the lighting units are symmetrically arranged with the perpendicular midline W2 as the symmetry axis, or the number and positions of the lighting units are symmetrically arranged with the perpendicular midline W2 as the symmetry axis. Thus, multiple lighting units can provide uniform lighting and improve lighting effects.

[0061] The end portion of the endoscope head 1 may also be provided with a second channel 6. Through the second channel 6, the doctor can spray medicine etc. into the body of the subject.

[0062] Furthermore, if Figure 1 As shown, the end of the endoscope head 1 can also be provided with a protrusion. The protrusion surrounds the first observation window 2a and the second observation window 2b. A gap groove is formed between the first observation window 2a, the second observation window 2b and the protrusion, and the gap groove can be used to retain the adhesive, so that the amount of adhesive used and the shape of the cured adhesive can be controlled, and the protrusion can also guide the accumulated liquid around the first observation window 2a and the second observation window 2b to the surroundings, and the residual accumulated liquid will not remain around the first observation window 2a and the second observation window 2b.

[0063] Furthermore, if Figure 6 As shown, the first lighting portion 5a and the second lighting portion 5b are located on one side of the first observation window 2a relative to the perpendicular bisector W2, the third lighting portion 5c and the fourth lighting portion 5d are located on one side of the second observation window 2b relative to the perpendicular bisector W2, the first lighting portion 5a and the third lighting portion 5c are located on one side of the nozzle 3 relative to the first line segment W1, and the second lighting portion 5b and the fourth lighting portion 5d are located on the side opposite to the nozzle 3 (i.e., on the side of the instrument channel 4) relative to the first line segment W2.

[0064] Thus, in this embodiment, the straight line where the first line segment W2 is located and the perpendicular bisector W2 are used as boundaries to divide the endoscope head end 1 into four areas, and an illumination unit is provided in each area, thereby further improving the uniformity of the illumination light and the image quality.

[0065] Furthermore, if Figure 6 As shown, the distance a between the center of the first lighting section 5a and the center of the first observation window 2a is 0.5-1.5 times the distance b between the center of the second lighting section 5b and the center of the first observation window 2a, the distance c between the center of the third lighting section 5c and the center of the second observation window 2b is 0.5-1.5 times the distance d between the center of the fourth lighting section 5d and the center of the second observation window 2b, and the distance f between the center of the second lighting section 5b and the center of the fourth lighting section 5d is 1-2 times the distance e between the center of the first lighting section 5a and the center of the third lighting section 5c. Preferably, the distance a between the center of the first lighting section 5a and the center of the first observation window 2a is 0.6-1.3 times the distance b between the center of the second lighting section 5b and the center of the first observation window 2a, the distance c between the center of the third lighting section 5c and the center of the second observation window 2b, and the distance d between the center of the fourth lighting section 5d and the center of the second observation window 2b.

[0066] In this way, by reasonably arranging the relative positions of multiple lighting units and the center of the first observation window 2a and the second observation window 2b, as well as the relative positions of the multiple lighting units, uniform lighting can be provided, image quality can be improved, and excellent 3D images can be provided.

[0067] Optimally, the distance a between the center of the first lighting portion 5a and the center of the first observation window 2a and the distance b between the center of the second lighting portion 5b and the center of the first observation window 2a are equal or approximately equal, and the distance c between the center of the third lighting portion 5c and the center of the second observation window 2b and the distance d between the center of the fourth lighting portion 5d and the center of the second observation window 2b are equal or approximately equal.

[0068] In addition, since the perpendicular bisector W2 is the perpendicular bisector of the first line segment W1 connecting the center of the first observation window 2a and the center of the second observation window 2b, the first observation window 2a and the second observation window 2b are symmetrically arranged with the perpendicular bisector W2 as the axis of symmetry. Furthermore, since the four lighting units of the first lighting unit 5a, the second lighting unit 5b, the third lighting unit 5c and the fourth lighting unit 5d are symmetrically arranged with the perpendicular bisector W2 as the axis of symmetry, that is, the first lighting unit 5a and the third lighting unit 5c are symmetrical with the perpendicular bisector W2 as the axis of symmetry, and the second lighting unit 5b and the fourth lighting unit 5d are symmetrical with the perpendicular bisector W2 as the axis of symmetry, therefore, when the distance a is equal to or substantially equal to the distance b and the distance c is equal to or substantially equal to the distance d, the distance a, the distance b, the distance c, and the distance d are equal to or substantially equal to each other.

[0069] In this way, by making the distances between multiple lighting parts and the center of the first observation window 2a and the second observation window 2b equal or approximately equal, the lighting shadow can be eliminated, the quality of the reflected light obtained by the camera element through the observation window can be improved, the image quality can be improved, and an excellent 3D image can be provided.

[0070] Next, refer to Figure 7 , another example of the nozzle in this embodiment is described in detail.

[0071] like Figure 7 As shown, the nozzle 3' further has a partition wall 319. The partition wall 319 divides the nozzle 3' fluid channel into two, and the two fluid channels can be connected to two fluid pumps respectively. In this way, the first observation window 2a or the second observation window 2b can be cleaned separately when necessary.

[0072] Furthermore, another embodiment of the present invention also relates to an endoscope having any of the endoscope head ends 1 described above.

[0073] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0074] It is further understood that, although the operations are described in a specific order in the accompanying drawings in the embodiments of the present invention, it should not be understood as requiring the operations to be performed in the specific order or serial order shown, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents, or make different combinations of the above technical features. However, these modifications, replacements and combinations do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An end portion of an endoscope head, characterized in that: include: a first observation window and a second observation window, wherein the second observation window is disposed adjacent to the first observation window on the top end surface of the end of the endoscope head; a nozzle disposed on a perpendicular bisector of a line connecting the center of the first observation window and the center of the second observation window, The nozzle comprises a first side wall, a second side wall, and an upper wall and a lower wall connected to the first side wall and the second side wall. The first side wall and the second side wall are located on both sides of the perpendicular midline, and the distance between the first side wall and the second side wall gradually increases as they approach the connecting line. The upper wall has a protrusion protruding in the direction of the connecting line relative to the first side wall and the second side wall. The protrusion is located in an area outside the field of view of the endoscope between the first observation window and the second observation window, and the top of the protrusion with the shortest distance from the connecting line is located on the perpendicular midline.

2. The endoscope head portion according to claim 1, characterized in that: The end surface of the protrusion facing the connecting line has a curved surface portion, a first flat surface portion and a second flat surface portion. The arc surface portion connects the first plane portion and the second plane portion, the first plane portion is connected to the first side wall, and the second plane portion is connected to the second side wall.

3. The endoscope head portion according to claim 2, characterized in that: When the first plane portion moves to the first observation window along a straight line perpendicular to the first plane portion, the first plane portion is tangent to the first observation window. When the second plane portion moves along a straight line perpendicular to the second plane portion to the second observation window, the second plane portion is tangent to the second observation window.

4. The endoscope head portion according to claim 1, wherein: The end of the endoscope head is also provided with an instrument channel. The instrument channel and the nozzle are located on both sides of the first line segment, The opening center of the instrument channel is located on the perpendicular midline.

5. The endoscope head portion according to claim 1, characterized in that: The end of the endoscope head is also provided with a plurality of lighting parts. The two sides of the perpendicular midline have the same number of the lighting parts.

6. The endoscope head portion according to claim 5, characterized in that: The plurality of lighting units include a first lighting unit, a second lighting unit, a third lighting unit and a fourth lighting unit, The first lighting unit and the second lighting unit are located on the same side as the first observation window relative to the perpendicular midline, and the third lighting unit and the fourth lighting unit are located on the same side as the second observation window relative to the perpendicular midline. The first lighting section and the third lighting section are located on the same side as the nozzle with respect to the first line segment, and the second lighting section and the fourth lighting section are located on the opposite side of the nozzle with respect to the first line segment.

7. The endoscope head portion according to claim 6, characterized in that: The distance between the center of the first lighting unit and the center of the first observation window is 0.5-1.5 times the distance between the center of the second lighting unit and the center of the first observation window. The distance between the center of the third lighting unit and the center of the second observation window is 0.5-1.5 times the distance between the center of the fourth lighting unit and the center of the second observation window. The distance between the center of the second lighting unit and the center of the fourth lighting unit is 1-2 times the distance between the center of the first lighting unit and the center of the third lighting unit.

8. The endoscope head portion according to claim 1, wherein: The end of the endoscope head is provided with a mounting hole for mounting the nozzle. A connecting pipe is fixed on the side of the mounting hole opposite to the nozzle. The connecting pipe is composed of a first connecting pipe and a second connecting pipe that are connected to each other, the first connecting pipe is fixed in the mounting hole and connected to the mounting hole, and the second connecting pipe is fixed to and connected to a fluid pipe that supplies fluid to the nozzle. An included angle between the first connecting pipe and the second connecting pipe is 160° to 175°.

9. The endoscope head portion according to claim 1, characterized in that: The end of the endoscope head has an embedding portion embedded in the nozzle, and the embedding portion abuts against the side surface of the lower wall, the lower surface of the first side wall, and the lower surface of the second side wall. The embedded portion, the upper wall, the lower wall, the first side wall, and the second side wall constitute a fluid outlet channel of the nozzle.

10. An endoscope, characterized in that: An endoscope head end according to any one of claims 1 to 9 is provided.

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