CN116784784A

CN116784784A - Nozzle assembly, endoscope front end assembly and endoscope

Info

Publication number: CN116784784A
Application number: CN202311070702.2A
Authority: CN
Inventors: 周震华; 莫文军; 唐鹏; 周冠华
Original assignee: Hunan Vathin Medical Instrument Co Ltd
Current assignee: Hunan Vathin Medical Instrument Co Ltd
Priority date: 2023-08-24
Filing date: 2023-08-24
Publication date: 2023-09-22
Anticipated expiration: 2043-08-24
Also published as: CN116784784B

Abstract

The invention discloses a nozzle assembly, an endoscope front end assembly and an endoscope, and relates to the technical field of medical instruments. The invention discloses a nozzle assembly, which comprises a nozzle, a mounting part, a switching part and a communicating core rod, wherein a first opening and a second opening are formed in the nozzle, the first opening is used for spraying a lens, the second opening is used for spraying tissues, the nozzle is mounted at the far end of the mounting part, the mounting part is further provided with a mounting hole along the axial direction, the communicating core rod is fixedly mounted in the mounting hole, the switching part is slidably sleeved on the communicating core rod, and liquid in a cleaning liquid pipe is sprayed out through the first opening and/or the second opening based on the sliding displacement of the switching part. The nozzle component can control the cleaning object of the nozzle by controlling the sliding displacement of the switching piece, has the advantages of good stability and easiness in control, and can also prevent the problem that the joint of the cleaning liquid pipe and the communicating core rod falls off.

Description

Nozzle assembly, endoscope front end assembly and endoscope

Technical Field

The invention relates to the technical field of medical instruments, in particular to a nozzle assembly, an endoscope front end assembly and an endoscope.

Background

Endoscopes are a commonly used medical instrument that can directly access the natural lumen of the human body for examination, providing the physician with adequate diagnostic information. Endoscopes generally include: an insertion part for being inserted into the human body, a handle for controlling the front end of the insertion part to be bent, and a display device for displaying the internal environment of the natural cavity of the human body; the endoscope can realize peeping and focus exploration and treatment of the interior of a human body through the matching of the three parts.

The far end of the insertion part is provided with a lens seat, and the lens seat is used for installing a lens, a light source module and the like, and can shoot image information inside a human body through the lens. Due to the complex environment in the body, the endoscope generally causes the end face of the lens to adhere to body fluid in the process of being inserted into the human body, and the shooting effect is affected. Therefore, the prior art provides an endoscope, and the nozzle assembly is arranged on the lens base of the endoscope, so that the cleaning liquid sprayed out by the nozzle assembly can clean dirt in front of the lens, and the shooting effect of the lens can be improved. However, the inventors found that not only the lens end face adheres to body fluid, but also body fluid such as blood, pus, etc. may exist at the human tissue to be photographed, resulting in that the lens cannot clearly photograph a clear form of the tissue.

Therefore, providing a nozzle assembly that can clean human tissue and lenses based on actual needs is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

The invention discloses a nozzle assembly, an endoscope front end assembly and an endoscope, which are used for solving the technical problem that the nozzle assembly of the endoscope in the related art can only clean a lens.

In order to solve the problems, the invention adopts the following technical scheme:

a first aspect of the invention provides a nozzle assembly.

The invention discloses a nozzle assembly, which is applied to an endoscope, and comprises a nozzle, a mounting piece, a switching piece and a communicating core rod, wherein the nozzle is provided with a first opening and a second opening, the first opening is used for spraying a lens, the second opening is used for spraying tissues, the nozzle is mounted at the far end of the mounting piece, the side wall of the mounting piece is provided with a first runner and a second runner, the first runner is communicated with the first opening, the second runner is communicated with the second opening, the far end of the first runner and the second runner are isolated through the wall surface of the mounting piece, the near ends of the first runner and the second runner are communicated with each other, the switching piece is provided with a first notch and a second notch, the first notch and the second notch are staggered in the axial direction of the switching piece, the near end of the communicating core rod is communicated with a tube, the communicating core rod is provided with a first outlet and a second outlet, the first outlet and the second outlet are respectively communicated with the first runner and the second runner through the wall surface of the mounting piece, the first runner and the second runner are communicated with the second runner through the axial direction of the mounting piece, the second runner is sleeved with the second runner, and the communicating core rod is further communicated with the mounting hole in the near direction of the mounting piece; the nozzle assembly further includes a pulling member mounted to the switch member outer wall for applying a proximally directed pulling force to the switch member.

Further, the nozzle assembly further comprises an elastic member, the elastic member is mounted on the outer wall of the switching member, the elastic member is used for applying a reset force towards the distal end to the switching member, the elastic member is in a compressed state when the pulling member is used for applying a pulling force to the switching member, and the elastic member is in a straightened state when the pulling force applied to the switching member by the pulling member is released.

Further, a limiting portion is further arranged on the outer wall of the switching piece, the limiting portion is an annular protruding structure arranged along the circumferential direction of the switching piece, and the elastic piece is installed between the limiting portion and the proximal end of the installation piece.

Further, a chute is arranged on one of the inner wall of the mounting piece and the outer wall of the switching piece, a guide protrusion is arranged on the other one, and the guide protrusion and the chute are clamped with each other.

Further, the mounting piece is fixedly mounted on the endoscope lens seat, and the first runner and the second runner on the mounting piece are formed by encircling the groove structure of the outer wall of the mounting piece and the inner wall of the endoscope lens seat.

Further, the mounting member includes a first mounting seat, a second mounting seat and a third mounting seat, the first flow passage and the second flow passage are located on the first mounting seat at a portion isolated from each other, the first flow passage and the second flow passage are located on a distal end of the second mounting seat at a portion communicated with each other, and the first mounting seat, the second mounting seat and the third mounting seat are in an integral structure or a split structure.

Further, one of the inner walls of the mounting piece and the endoscope lens seat is provided with a positioning groove, and the other one is provided with a positioning protrusion, and the positioning groove and the positioning protrusion are clamped with each other.

Further, a sealing layer is further arranged between the positioning groove and the positioning protrusion, and the sealing layer is used for sealing and connecting the positioning groove with the positioning protrusion.

A second aspect of the invention provides an endoscope front end assembly.

The endoscope front end assembly comprises a nozzle assembly and an endoscope lens seat, wherein the nozzle assembly is the nozzle assembly according to any one of the technical schemes, and the nozzle assembly is arranged along the axial direction of the endoscope lens seat.

A third aspect of the invention provides an endoscope.

The endoscope comprises a handle, an insertion part and a display device, wherein the distal end of the insertion part is provided with the endoscope front end assembly according to any one of the technical schemes, the handle is connected with the insertion part, and the handle is also connected with the display device.

The technical scheme adopted by the invention at least can achieve the following beneficial effects:

The nozzle assembly is applied to an endoscope, the nozzle is provided with the first opening and the second opening, the first opening is used for spraying and washing the lens, the second opening is used for spraying and washing tissues, liquid in the communicated core rod can be sprayed out through the first opening and/or the second opening by controlling the sliding displacement of the switching piece, namely the nozzle assembly provided by the invention provides a plurality of cleaning modes, and a user can clean the lens, the tissue or both the lens and the tissue based on actual requirements, so that clear tissue pictures can be shot by the lens, and the accuracy of endoscope detection can be improved. The nozzle assembly solves the technical problem that the nozzle assembly of the endoscope in the related art can only clean the lens.

According to the nozzle assembly, the cleaning object of the nozzle can be controlled by controlling the sliding displacement of the switching piece, and the sliding displacement of the switching piece can be controlled by the magnitude of the pulling force, so that the magnitude of the pulling force is relatively stable and is not easy to fluctuate, and therefore, the scheme for controlling the sliding displacement of the switching piece has the advantage of good stability; on the other hand, the endoscope lens seat has larger size in the axial direction, and the first notch and the second notch on the switching piece are arranged larger along the size of the axial direction of the endoscope lens seat, and the size of the first outlet and the second outlet on the communicating core bar is arranged larger along the size of the axial direction of the endoscope lens seat, so that the first outlet and the second outlet are easy to align with the first flow channel and/or the second flow channel, liquid in the cleaning liquid pipe enters the first flow channel and/or the second flow channel, namely the switching piece can have wider sliding displacement, and the scheme for controlling the sliding displacement of the switching piece also has the advantages of easiness in controlling and lower control precision requirement on the sliding displacement of the switching piece.

Furthermore, according to the nozzle assembly disclosed by the application, the communicating core rod is communicated with the cleaning liquid pipe, and the switching piece is sleeved on the communicating core rod in a sliding manner, because the communicating core rod is fixedly arranged in the mounting hole, when the switching piece slides along the communicating core rod to switch a cleaning object of the nozzle, the phenomenon of moving, compressing or stretching at the joint of the cleaning liquid pipe and the communicating core rod can be avoided, so that the stability of the joint of the cleaning liquid pipe and the communicating core rod can be still maintained when the nozzle assembly is used for a long time, and the problem of falling at the joint of the cleaning liquid pipe and the communicating core rod is prevented.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a first schematic illustration of an embodiment of the present application with a nozzle assembly closed;

FIG. 2 is a second schematic illustration of an embodiment of the present application with the nozzle assembly closed;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a first schematic view of an embodiment of the present application with a nozzle assembly in tissue cleansing;

FIG. 5 is a second schematic view of an embodiment of the present application with a nozzle assembly in tissue cleansing;

FIG. 6 is a B-B cross-sectional view of FIG. 5;

FIG. 7 is a first schematic illustration of a nozzle assembly of an embodiment of the present application in the simultaneous cleaning of tissue and lens;

FIG. 8 is a second schematic view of an embodiment of the present application with a nozzle assembly in the simultaneous cleaning of tissue and lens;

FIG. 9 is a cross-sectional view of C-C of FIG. 8;

FIG. 10 is a first schematic view of an embodiment of the nozzle assembly of the present application in cleaning a lens;

FIG. 11 is a second schematic view of an embodiment of the nozzle assembly of the present application in cleaning a lens;

FIG. 12 is a D-D sectional view of FIG. 11;

FIG. 13 is a first schematic view of an embodiment of the present application with a nozzle and mounting assembly;

FIG. 14 is a second schematic view of an embodiment of the present application with a nozzle and mounting assembly;

FIG. 15 is a sectional E-E view of FIG. 14;

FIG. 16 is a schematic view of a switch according to an embodiment of the present application;

FIG. 17 is a first schematic illustration of a communicating core rod according to an embodiment of the present application;

FIG. 18 is a second schematic illustration of a communicating core rod according to an embodiment of the present application;

FIG. 19 is a cross-sectional F-F view of FIG. 18;

FIG. 20 is a schematic view of an endoscope front end assembly in accordance with an embodiment of the present application;

FIG. 21 is a schematic view of an endoscope lens mount body in accordance with an embodiment of the present application;

fig. 22 is an enlarged view of part G of fig. 21;

FIG. 23 is a schematic view of an endoscope according to an embodiment of the present application.

In the figure: 10. a nozzle assembly; 11. a nozzle; 111. a first opening; 112. a second opening; 12. a mounting member; 12a, a first mounting seat; 12b, a second mounting seat; 12c, a third mounting seat; 121. a first flow passage; 122. a second flow passage; 123. a mounting hole; 124. a chute; 125. a positioning groove; 126. a clamping groove; 13. a switching member; 131. a first incision; 132. a second incision; 133. a limit part; 134. a guide protrusion; 14. the core bar is communicated; 141. a first outlet; 142. a second outlet; 143. a bump; 15. a pulling member; 16. an elastic member; 20. an endoscope lens base; 21. positioning the bulge; 211. a step surface; 22. a base; 23. a lens; 24. a nozzle mounting hole; 30. a handle; 40. an insertion portion.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, based on the examples herein, which are within the scope of the application as defined by the claims, will be within the scope of the application as defined by the claims.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In various embodiments of the present application, "proximal" and "distal" refer to the location of the components relative to the user's far and near position in the environment of use, wherein the end closer to the user is designated as "proximal" and the end farther from the user is designated as "distal".

The application is characterized in that: in the prior art, the endoscope can clean dirt in front of the lens through the cleaning liquid sprayed out of the nozzle assembly, so that the shooting effect of the lens is improved, however, the nozzle assembly in the prior art only has one nozzle, and the cleaning of the lens and human tissues cannot be realized at the same time. In view of the above problems, the present application provides a nozzle assembly having two openings, and controls a cleaning object of the nozzle by controlling a sliding displacement of a switching member, which not only can provide a plurality of cleaning modes, but also has an advantage of good control stability; by utilizing the characteristic that the endoscope lens seat has larger dimension in the axial direction, the requirement on the control precision of the sliding displacement of the switching piece can be reduced, thereby reducing the control difficulty. Meanwhile, the nozzle assembly can maintain the stability of the joint of the cleaning liquid pipe and the communicating core rod due to the arrangement of the communicating core rod.

The nozzle assembly, the endoscope front end assembly and the endoscope provided by the embodiment of the application are described in detail below by referring to fig. 1 to 23 through specific embodiments and application scenes thereof.

The first aspect of the present embodiment provides a nozzle assembly.

The nozzle assembly of the present embodiment is applied to an endoscope, specifically, is provided on the endoscope lens mount 20 at the distal end of the endoscope insertion portion 40, and is provided in the axial direction of the endoscope lens mount 20, as shown in fig. 20. The nozzle assembly of the present embodiment includes a nozzle 11, a mounting member 12, a switching member 13, and a communicating stem 14, as shown in fig. 1 to 12.

The nozzle 11 is provided with a first opening 111 for spraying the lens 23 and a second opening 112 for spraying the tissue. It will be appreciated that the first opening 111 and the second opening 112 extend through the nozzle 11 in the axial direction so that cleaning fluid can flow distally from the proximal end of the nozzle 11. Preferably, the first opening 111 is disposed on a side surface of the nozzle 11, the second opening 112 is disposed on an end surface of the nozzle 11, and after the nozzle assembly is mounted on the endoscope lens holder 20, the first opening 111 faces the lens 23, and the second opening 112 faces the tissue, as shown in fig. 1 to 15 and 20. This arrangement of the first opening 111 and the second opening 112 is beneficial to improving the cleaning effect of the first opening 111 on the lens 23 and also beneficial to improving the cleaning effect of the second opening 112 on tissues. The first opening 111 and the second opening 112 are separated from each other, avoiding a liquid flow of the first opening 111 and the second opening 112. More preferably, the first opening 111 and the second opening 112 are arc-shaped openings, so that the liquid has a larger width after being ejected through the first opening 111 and the second opening 112, which is beneficial to cleaning a wider range of the lens 23 or tissue, as shown in fig. 20.

The nozzle 11 is mounted at the distal end of the mounting member 12, the side wall of the mounting member 12 is formed with a first flow passage 121 and a second flow passage 122, the first flow passage 121 communicates with the first opening 111, the second flow passage 122 communicates with the second opening 112, the distal end of the first flow passage 121 and the distal end of the second flow passage 122 are isolated by the wall surface of the mounting member 12, the proximal ends of the first flow passage 121 and the second flow passage 122 communicate with each other, the switching member 13 is provided with a first notch 131 and a second notch 132, the first notch 131 and the second notch 132 are partially offset in the axial direction of the switching member 13, the proximal end of the communicating core rod 14 communicates with the cleaning liquid pipe, the communicating core rod 14 is provided with a first outlet 141 and a second outlet 142, the first outlet 141 and the second outlet 142 are aligned with the proximal end of the first flow passage 121 and the proximal end of the second flow passage 122, respectively, the mounting member 12 is further provided with a mounting hole 123 in the axial direction, the communicating core rod 14 is fixedly mounted in the mounting hole 123, the switching member 13 is slidably sleeved on the communicating core rod 14, and the liquid in the cleaning liquid pipe is ejected through the first opening 111 and/or the second opening 112 based on the sliding displacement of the switching member 13. Fig. 1 to 12 show schematic diagrams after assembling the nozzle 11, the mounting member 12, the switching member 13 and the communicating core rod 14, fig. 13 to 15 show schematic diagrams after assembling the nozzle 11 and the mounting member 12, fig. 16 shows schematic diagrams of the switching member 13, and fig. 17 to 19 show schematic diagrams of the communicating core rod 14.

The nozzle assembly further comprises a pulling member 15, wherein the pulling member 15 is mounted on the outer wall of the switching member 13, and the pulling member 15 is used for applying a pulling force to the switching member 13 towards the proximal end, as shown in fig. 1, 4 and 7-12. Preferably, the pulling member 15 may be a steel wire with a relatively high strength, the distal end of the pulling member 15 is fixed to the outer wall of the switching member 13, and the proximal end of the pulling member 15 is fixed to the handle 30 of the endoscope so as to apply a pulling force toward the proximal end to the pulling member 15 by operating the handle 30. A sliding power can be applied to the switching member 13 by the pulling member 15, thereby driving the switching member 13 to slide. The pulling member 15 is fixed on the outer wall of the switching member 13, so that the pulling member 15 can be prevented from interfering the flow of the liquid in the cleaning liquid pipe, and the problem that the service life of the pulling member 15 is influenced due to long-term soaking in the liquid can be avoided.

It is to be understood that only the structures of the respective components are shown in the drawings, and the sizes (such as length, thickness, diameter) and the like of the respective components are not limited to those shown in the drawings, and may be set based on actual demands.

Preferably, the communicating core 14 is provided with a bump 143, the proximal end of the mounting member 12 is provided with a slot 126, and the communicating core 14 and the mounting member 12 can be fixedly connected by matching the bump 143 with the slot 126, as shown in fig. 13, 15 and 16.

Preferably, the proximal end of the communicating stem 14 is a sealed structure. Specifically, when the communicating core rod 14 has a structure with two through ends, a sealing element may be disposed at the distal end of the communicating core rod 14 for sealing; or the communicating core 14 may be provided with only the proximal end with openings and the distal end may be left unapertured from the solid structure.

Preferably, the communicating core rod 14 and the cleaning liquid pipe can be of a split type structure, and the end surfaces of the communicating core rod 14 and the cleaning liquid pipe are fixedly connected during assembly; or the communicating core 14 is a distal end portion of the cleaning liquid pipe, that is, the communicating core 14 and the cleaning liquid pipe are in an integral structure. More preferably, in order to facilitate the sliding of the switching member 13, the communicating core bar 14 is made of a hard material; to facilitate the adaptation of the bending of the insert 40, the cleaning liquid tube is made of a soft material.

In the present embodiment, the first notch 131 and the second notch 132 are partially offset in the axial direction of the switching member 13, that is, when the lengths of the first notch 131 and the second notch 132 are the same, the distances between the first notch 131 and the second notch 132 from the distal end face and the proximal end face of the switching member 13 are different; it can also be said that when the first slit 131 and the second slit 132 are the same in length, the first slit 131 and the second slit 132 are partially aligned as shown in fig. 16. It is known that the lengths of the first notch 131 and the second notch 132 may be the same or different.

Specifically, in the normal state, the nozzle assembly is in the closed state (without being limited thereto, the initial state of the nozzle assembly may be any one of the state of the spray lens 23, the state of spraying the tissue, and the state of spraying the lens 23 and the tissue simultaneously), that is, the nozzle assembly neither cleans the lens 23 nor the tissue, and the user adjusts the sliding displacement of the switching member 13 so that the nozzle assembly is in the open state only when there is a cleaning requirement. The switching element 13 can achieve at least a first sliding displacement, a second sliding displacement and a third sliding displacement, wherein the first sliding displacement < the second sliding displacement < the third sliding displacement. The first sliding displacement is a displacement of the switching piece 13 from the initial state to the state just when the nozzle assembly cleans the tissue; the second sliding displacement is a displacement of the switching piece 13 from the initial state to just when the nozzle assembly simultaneously washes the tissue and the lens 23; the third sliding displacement is a displacement of the switching piece 13 from the initial state to a movement just when the nozzle assembly cleans the lens 23.

The communication state between the ports when the nozzle assembly is in different states will be described below, respectively.

The following description will take, as an example, that the lengths of the first slit 131 and the second slit 132 in the axial direction of the switching member 13 are the same, and that the distance from the first slit 131 to the proximal end face of the switching member 13 is greater than the distance from the second slit 132 to the proximal end face of the switching member 13.

When the nozzle assembly is in the closed state, the first notch 131 on the switching member 13 is completely dislocated from the first outlet 141, the second notch 132 is completely dislocated from the second outlet 142, that is, the first outlet 141 is isolated from the first flow channel 121 by the wall surface of the switching member 13, and the second outlet 142 is isolated from the second flow channel 122 by the wall surface of the switching member 13, so that the liquid entering the communicating core rod 14 through the cleaning liquid pipe cannot flow out of the first outlet 141 into the first opening 111 or flow out of the second outlet 142 into the second opening 112, and at this time, the nozzle assembly neither cleans the lens 23 nor the tissue, as shown in fig. 1-3.

When the switch 13 slides proximally from the initial position and the sliding displacement of the switch 13 is greater than the first sliding displacement and less than the second sliding displacement, the first notch 131 is located at a greater distance from the proximal end face of the switch 13, at this time, the first notch 131 and the first outlet 141 of the switch 13 are still completely misaligned, the second notch 132 is partially aligned with or completely aligned with the second outlet 142, that is, the first outlet 141 is isolated from the first flow channel 121 by the wall surface of the switch 13, and the second outlet 142 is in communication with the second flow channel 122 through the second notch 132 of the switch 13, so that the liquid entering the communicating core 14 through the cleaning liquid tube cannot flow out from the first outlet 141 into the first opening 111, but can flow out from the second outlet 142 into the second flow channel 122, and thus into the second opening 112, and at this time, the nozzle assembly does not clean the lens 23, but can clean tissues, as shown in fig. 4-6.

When the switch 13 slides proximally from the initial position, and the sliding displacement of the switch 13 is greater than the second sliding displacement and less than the third sliding displacement, since the first notch 131 and the second notch 132 are partially offset in the axial direction of the switch 13, the first notch 131 on the switch 13 may be partially aligned with the first outlet 141 or completely aligned with the second notch 142, that is, the first outlet 141 and the first flow channel 121 are communicated through the first notch 131 on the switch 13, and the second outlet 142 and the second flow channel 122 are communicated through the second notch 132 on the switch 13, so that the liquid entering the communicating core rod 14 through the cleaning liquid tube can flow out from the first outlet 141 into the first flow channel 121, thus into the first opening 111, and also flow out from the second outlet 142 into the second flow channel 122, thus into the second opening 112, and at this time the nozzle assembly can clean the lens 23, and also clean tissues, as shown in fig. 7-9.

When the switch 13 slides proximally from the initial position and the sliding displacement of the switch 13 is greater than the third sliding displacement, the second notch 132 is located at a greater distance from the distal end face of the switch 13, at this time, the first notch 131 on the switch 13 may be partially aligned with the first outlet 141 or completely aligned with the second notch 132, that is, the first notch 131 is in communication with the first channel 121 through the first notch 131 on the switch 13, and the second notch 142 is isolated from the second channel 122 through the wall surface of the switch 13, so that the liquid entering the communicating stem 14 through the cleaning liquid tube may flow out from the first notch 141 into the first channel 121 and into the first opening 111, but may not flow out from the second notch 142 into the second opening 112, at this time, the nozzle assembly cleans the lens 23, but may not clean the tissue, as shown in fig. 10 to 12.

The nozzle assembly in the above-mentioned scheme is applied to the endoscope, the nozzle 11 is provided with the first opening 111 and the second opening 112, the first opening 111 is used for spraying and washing the lens 23, the second opening 112 is used for spraying and washing the tissue, through controlling the sliding displacement of the switching piece 13, the liquid in the communicating core rod 14 can be sprayed out through the first opening 111 and/or the second opening 112, that is, the nozzle assembly of the embodiment, multiple cleaning modes are provided, and a user can clean the lens 23, clean the tissue or clean the lens 23 and the tissue at the same time based on actual requirements, so that the lens 23 can shoot clear tissue pictures, and the accuracy of the endoscope detection can be improved. Namely, the nozzle assembly of the present embodiment solves the technical problem that the nozzle assembly of the endoscope in the related art can only clean the lens 23.

In the above solution, the sliding displacement of the switching member 13 can be controlled to control the cleaning object of the nozzle 11, and since the sliding displacement of the switching member 13 can be controlled by the magnitude of the tensile force, and the magnitude of the tensile force is relatively stable and is not easy to fluctuate, the solution of controlling the sliding displacement of the switching member 13 in this embodiment has the advantage of good stability; on the other hand, the endoscope lens holder 20 has a larger dimension in the axial direction thereof, and by setting the dimensions of the first notch 131 and the second notch 132 on the switching member 13 in the axial direction of the endoscope lens holder 20 larger, the dimensions of the first outlet 141 and the second outlet 142 on the communicating stem 14 in the axial direction of the endoscope lens holder 20 are set larger, so that the first outlet 141 and the second outlet 142 are easily aligned with the first flow channel 121 and/or the second flow channel 122, the liquid in the cleaning liquid pipe enters the first flow channel 121 and/or the second flow channel 122, that is, the switching member 13 of the present embodiment can have a wider range of sliding displacement, and thus the scheme of controlling the sliding displacement of the switching member 13 of the present embodiment also has the advantages of easy control and lower control accuracy requirement of the sliding displacement of the switching member 13.

Further, in the nozzle assembly in the above-mentioned scheme, the communicating core rod 14 is communicated with the cleaning solution pipe, the switching piece 13 is slidably sleeved on the communicating core rod 14, and because the communicating core rod 14 is fixedly installed in the installation hole 123, when the switching piece 13 slides along the communicating core rod 14 to switch the cleaning object of the nozzle 11, the phenomenon that the connection part of the cleaning solution pipe and the communicating core rod 14 moves, compresses or stretches can be avoided, so that the stability of the connection part of the cleaning solution pipe and the communicating core rod 14 can be still maintained when the nozzle assembly is used for a long time, and the problem that the connection part of the cleaning solution pipe and the communicating core rod 14 drops is prevented.

According to a preferred embodiment, the nozzle assembly further comprises an elastic member 16, the elastic member 16 is mounted on the outer wall of the switching member 13, the elastic member 16 is used for applying a distally-directed restoring force to the switching member 13, and the elastic member 16 is in a compressed state when the pulling member 15 is used for applying a pulling force to the switching member 13, and the elastic member 16 is in a straightened state when the pulling force applied by the pulling member 15 to the switching member 13 is released, as shown in fig. 3, 6, 9 and 12. Preferably, the elastic member 16 may be a spring.

In the nozzle assembly according to the preferred embodiment, the pulling member 15 can apply sliding power to the switching member 13, so as to drive the switching member 13 to slide, and simultaneously, the elastic member 16 is in a compressed state, and then when the pulling force applied by the pulling member 15 is released, the elastic member 16 can utilize the restoring force of extension to drive the switching member 13 to slide towards the distal end, so that the switching member 13 is reset. In the nozzle assembly according to the preferred technical solution of this embodiment, the elastic member 16 is fixed on the outer wall of the switching member 13, so as to avoid the interference of the elastic member 16 on the flow of the liquid in the cleaning liquid tube, and also avoid the problem that the service life of the elastic member 16 is affected due to long-term immersion in the liquid.

According to a preferred embodiment, the outer wall of the switching member 13 is further provided with a stopper 133, the stopper 133 is an annular protrusion structure provided along the circumferential direction of the switching member 13, and the elastic member 16 is mounted between the stopper 133 and the proximal end of the mounting member 12, as shown in fig. 3, 6, 9, 12 and 16. When the pulling member 15 applies sliding power to the switching member 13, the pulling force can be transmitted to the elastic member 16 through the limiting portion 133, so that the elastic member 16 is pushed to be in a compressed state; when the pulling force applied by the pulling member 15 is released, the elastic member 16 is reset, so that the elastic member 16 can push the limiting portion 133 to slide towards the distal end, and the switching member 13 is driven to reset. Fig. 3 shows a schematic view of the elastic member 16 in a natural state, and fig. 6, 9 and 12 show schematic views of the elastic member 16 in different degrees of compression. Without being limited thereto, the elastic member 16 may be limited by the proximal end surface of the switching member 13. In the nozzle assembly according to the preferred embodiment, the setting of the limiting portion 133 ensures the compression and resetting reliability of the elastic member 16, thereby ensuring the switching reliability of the states of the nozzle assembly.

According to a preferred embodiment, one of the inner wall of the mounting member 12 and the outer wall of the switching member 13 is provided with a slide groove 124, and the other is provided with a guide projection 134, and the guide projection 134 and the slide groove 124 are engaged with each other.

Fig. 15 and 16 show schematic views of the installation member 12 having the sliding groove 124 provided on the inner wall thereof and the switching member 13 having the guide projection 134 provided on the outer wall thereof, respectively. Preferably, the number of the sliding grooves 124 is at least two, and the sliding grooves 124 are uniformly distributed along the circumferential direction of the inner wall of the mounting member 12; the number of the guide protrusions 134 is at least two, and the guide protrusions 134 are uniformly distributed along the circumferential direction of the outer wall of the switching member 13. More preferably, the length of the sliding groove 124 is not less than the maximum sliding displacement of the switching member 13, and the length of the guide protrusion 134 may be the same as or less than the maximum sliding displacement of the switching member 13.

In the nozzle assembly according to the preferred embodiment, the sliding groove 124 and the guiding protrusion 134 cooperate to limit the circumferential direction of the switching member 13, so that the switching member 13 only moves along the axial direction thereof when sliding, and the problem that the first notch 131 cannot be always aligned with the proximal end of the first runner 121 and/or the second notch 132 cannot be always aligned with the proximal end of the second runner 122 when the switching member 13 slides along the axial direction thereof due to the movement of the switching member 13 along the circumferential direction thereof when sliding to the designated position is avoided.

According to a preferred embodiment, the mounting member 12 is fixedly mounted to the endoscope lens holder 20, and the first and second flow passages 121, 122 in the mounting member 12 are defined by a groove structure in an outer wall of the mounting member 12 and an inner wall of the endoscope lens holder 20. Neither the first runner 121 nor the second runner 122 of fig. 1-15 embody the inner wall of the endoscope lens mount 20. Specifically, as shown in fig. 20 and 21, the endoscope lens holder 20 is provided with a nozzle mounting hole 24, and the mounting member 12 and the nozzle mounting hole 24 may be in interference fit, so that the liquid passing through the first flow channel 121 or the second flow channel 122 is prevented from overflowing from a gap between the mounting member 12 and the inner wall of the endoscope lens holder 20, and the cleaning effect is prevented from being affected.

Because the endoscope lens holder 20 is provided with the structures such as the lens 23, the light source module, the instrument channel and the like, the space for installing the nozzle assembly is limited, the nozzle assembly according to the preferred technical scheme of the embodiment, the first flow channel 121 and the second flow channel 122 on the mounting member 12 are formed by enclosing the groove structure of the outer wall of the mounting member 12 with the inner wall of the endoscope lens holder 20, and the advantage that the size of the endoscope lens holder 20 along the axial direction is larger can be effectively utilized, the inner wall of the endoscope lens holder 20 can be effectively utilized to realize the miniaturization of the nozzle assembly, or the size of the first flow channel 121 and the second flow channel 122 can be effectively increased under the condition that the size of the nozzle assembly is fixed, so that more liquid passes through the first flow channel 121 and/or the second flow channel 122, and the cleaning effect of the nozzle assembly is improved.

According to a preferred embodiment, the mount 12 includes a first mount 12a, a second mount 12b, and a third mount 12c, a portion where the first flow passage 121 and the second flow passage 122 are isolated from each other is located on the first mount 12a, a portion where the first flow passage 121 and the second flow passage 122 communicate with each other is located on a distal end of the second mount 12b, and the first mount 12a, the second mount 12b, and the third mount 12c are of a unitary structure or of a split structure, as shown in fig. 13 to 15. Preferably, the first mount 12a, the second mount 12b, and the third mount 12c are of a split structure, that is, the first mount 12a, the second mount 12b, and the third mount 12c are manufactured separately, and during assembly, the end surfaces of the first mount 12a, the second mount 12b, and the third mount 12c are fixedly connected, and the centers of the mounts are kept coaxial. In the nozzle assembly according to the preferred embodiment, the first mounting seat 12a, the second mounting seat 12b and the third mounting seat 12c are of a split structure, so that the manufacturing difficulty of the mounting member 12 can be reduced.

According to a preferred embodiment, one of the mounting member 12 and the inner wall of the endoscope lens holder 20 is provided with a positioning groove 125, and the other is provided with a positioning protrusion 21, and the positioning groove 125 and the positioning protrusion 21 are engaged with each other. Fig. 13 and 22 show schematic views each of which is provided with a positioning groove 125 on the outer wall of the mount 12 and a positioning protrusion 21 on the inner wall of the endoscope lens holder 20. Preferably, the number of the positioning grooves 125 is at least two, and the positioning grooves 125 are uniformly distributed along the circumferential direction of the outer wall of the mounting member 12; the number of the positioning projections 21 is at least two, and the positioning projections 21 are uniformly distributed along the circumferential direction of the inner wall of the endoscope lens holder 20. More preferably, the length of the positioning groove 125 is the same as the length of the mount 12, and the length of the positioning projection 21 is not less than the length of the positioning groove 125.

In the nozzle assembly according to the preferred embodiment, during the assembly process, the positioning groove 125 and the positioning protrusion 21 cooperate to facilitate positioning the first opening 111 and the second opening 112 on the nozzle 11, so that the assembled first opening 111 faces the lens 23 and the assembled second opening 112 faces the tissue; on the other hand, the positioning groove 125 is disposed between the first flow channel 121 and the second flow channel 122, and by matching the positioning groove 125 with the positioning protrusion 21, the isolation between the first flow channel 121 and the second flow channel 122 can be enhanced due to the step surface 211 (as shown in fig. 22) at the positioning protrusion 21, so that the phenomenon that the liquid in the first flow channel 121 and the liquid in the second flow channel 122 are in series flow is avoided, and the cleaning effect of the nozzle assembly is ensured.

According to a preferred embodiment, a sealing layer is further provided between the positioning groove 125 and the positioning protrusion 21, the sealing layer being used for sealing the positioning groove 125 with the positioning protrusion 21. Specifically, before assembly, the sealing connection between the positioning groove 125 and the positioning protrusion 21 can be achieved by coating the surface of the positioning groove 125 or the positioning protrusion 21 with a sealant and then clamping the positioning groove 125 and the positioning protrusion 21 to each other. In the nozzle assembly according to the preferred embodiment, the positioning groove 125 is in sealing connection with the positioning protrusion 21, so that the isolation between the first flow channel 121 and the second flow channel 122 can be further ensured, and the phenomenon that the liquid in the first flow channel 121 and the liquid in the second flow channel 122 are in series flow is avoided, thereby ensuring the cleaning effect of the nozzle assembly.

A second aspect of the present embodiments provides an endoscope front end assembly.

The endoscope front end assembly of the present embodiment includes a nozzle assembly 10 and an endoscope lens holder 20, wherein the nozzle assembly 10 is the nozzle assembly of any one of the aspects of the present embodiment, and the nozzle assembly 10 is disposed along an axial direction of the endoscope lens holder 20, as shown in fig. 20. The endoscope lens mount 20 includes a mount 22 and a lens 23, and the lens 23 is mounted on the mount 22. The base 22 is further provided with a nozzle mounting hole 24 penetrating along an axial direction thereof, and the nozzle assembly 10 is mounted at the nozzle mounting hole 24, as shown in fig. 20 to 22.

The front end assembly of the endoscope of the embodiment, due to the inclusion of the nozzle assembly of any one of the technical schemes of the embodiment, the front end assembly of the endoscope of the embodiment has a plurality of cleaning modes, and a cleaning object can be selected based on actual requirements, thereby being beneficial to the lens 23 to shoot clear tissue pictures and improving the accuracy of endoscope detection; on the other hand, when the endoscope front end component of the embodiment switches the cleaning object, the endoscope front end component also has the advantages of good control stability, low control precision requirement and small control difficulty, and can also prevent the problem that the joint of the cleaning liquid pipe and the communicating core rod 14 falls off.

A third aspect of the present embodiments provides an endoscope.

The endoscope of the present embodiment includes a handle 30, an insertion portion 40, and a display device, wherein the distal end of the insertion portion 40 is provided with the endoscope front end assembly of any one of the aspects of the present embodiment, the handle 30 is connected to the insertion portion 40, and the handle 30 is also connected to the display device, as shown in fig. 23. Preferably, the handle 30 is provided with a structure for fixing the proximal end of the drawing member 15 of the spray assembly, and the switching member 13 can be controlled to slide by applying a pulling force to the drawing member 15 towards the proximal end through operating the handle 30. The remaining structure of the handle 30, the insertion portion 40 and the display device may be the same as the prior art, and will not be described again.

The endoscope of the present embodiment may be a disposable endoscope, a limited-time multiplexing endoscope, or an infinite-time multiplexing endoscope. The endoscope of the present embodiment may be a bronchoscope, a nephroscope, a esophagoscope, a gastroscope, a enteroscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, or the like. The present embodiment does not particularly limit the kind of endoscope.

The endoscope of the embodiment, because the distal end of the insertion portion 40 is provided with the endoscope front end assembly according to any one of the embodiments, the endoscope of the embodiment has multiple cleaning modes, and can select a cleaning object based on actual requirements, which is beneficial to the lens 23 to shoot clear tissue pictures and improves the accuracy of endoscope detection; on the other hand, when the endoscope of the embodiment switches the cleaning object, the endoscope also has the advantages of good control stability, low control precision requirement and small control difficulty, and can also prevent the problem that the joint of the cleaning liquid pipe and the communicating core rod 14 falls off.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention.

Claims

1. A nozzle assembly for an endoscope, comprising a nozzle (11), a mounting member (12), a switching member (13) and a communicating stem (14), wherein,

the nozzle (11) is provided with a first opening (111) and a second opening (112), the first opening (111) is used for spraying a lens, the second opening (112) is used for spraying tissues,

the nozzle (11) is arranged at the far end of the mounting piece (12), a first flow passage (121) and a second flow passage (122) are formed on the side wall of the mounting piece (12), the first flow passage (121) is communicated with the first opening (111), the second flow passage (122) is communicated with the second opening (112), the far end of the first flow passage (121) and the far end of the second flow passage (122) are isolated through the wall surface of the mounting piece (12), the near ends of the first flow passage (121) and the second flow passage (122) are communicated with each other,

The switching piece (13) is provided with a first notch (131) and a second notch (132), the first notch (131) and the second notch (132) are partially staggered in the axial direction of the switching piece (13), the proximal end of the communicating core bar (14) is communicated with a cleaning liquid pipe, the communicating core bar (14) is provided with a first outlet (141) and a second outlet (142), the first outlet (141) and the second outlet (142) are respectively aligned with the proximal end of the first runner (121) and the proximal end of the second runner (122),

the mounting piece (12) is further provided with a mounting hole (123) along the axial direction, the communicating core bar (14) is fixedly mounted in the mounting hole (123), the switching piece (13) is sleeved on the communicating core bar (14) in a sliding mode, and liquid in the cleaning liquid pipe is sprayed out through the first opening (111) and/or the second opening (112) based on sliding displacement of the switching piece (13);

the nozzle assembly further comprises a pulling member (15), wherein the pulling member (15) is mounted on the outer wall of the switching member (13), and the pulling member (15) is used for applying a pulling force towards the proximal end to the switching member (13).

2. The nozzle assembly of claim 1, further comprising an elastic member (16), the elastic member (16) being mounted to an outer wall of the switching member (13), the elastic member (16) being configured to apply a distally directed restoring force to the switching member (13),

and the pulling member (15) is used for applying a pulling force to the switching member (13), the elastic member (16) is in a compressed state, and when the pulling force applied by the pulling member (15) to the switching member (13) is released, the elastic member (16) is in a straightened state.

3. The nozzle assembly according to claim 2, characterized in that a limiting portion (133) is further provided on an outer wall of the switching member (13), the limiting portion (133) is an annular projection structure provided in a circumferential direction of the switching member (13), and the elastic member (16) is mounted between the limiting portion (133) and a proximal end of the mounting member (12).

4. A nozzle assembly according to any one of claims 1 to 3, wherein one of the inner wall of the mounting member (12) and the outer wall of the switching member (13) is provided with a slide groove (124), and the other is provided with a guide projection (134), the guide projection (134) and the slide groove (124) being engaged with each other.

5. A nozzle assembly according to any one of claims 1 to 3, wherein the mounting member (12) is fixedly mounted to an endoscope lens mount (20), and the first and second flow passages (121, 122) on the mounting member (12) are defined by a groove formation of an outer wall of the mounting member (12) and an inner wall of the endoscope lens mount (20).

6. The nozzle assembly of claim 5, wherein the mounting member (12) comprises a first mount (12 a), a second mount (12 b), and a third mount (12 c),

the first runner (121) and the second runner (122) are mutually isolated and are positioned on the first mounting seat (12 a), the first runner (121) and the second runner (122) are mutually communicated and are positioned on the far end of the second mounting seat (12 b), and the first mounting seat (12 a), the second mounting seat (12 b) and the third mounting seat (12 c) are of an integral structure or a split structure.

7. The nozzle assembly according to claim 5, wherein one of the mounting member (12) and the inner wall of the endoscope lens holder (20) is provided with a positioning groove (125), and the other is provided with a positioning protrusion (21), and the positioning groove (125) and the positioning protrusion (21) are engaged with each other.

8. The nozzle assembly according to claim 7, characterized in that a sealing layer is further provided between the positioning groove (125) and the positioning protrusion (21), the sealing layer being used for sealing the positioning groove (125) with the positioning protrusion (21).

9. An endoscope front end assembly, characterized by comprising a nozzle assembly (10) and an endoscope lens mount (20), wherein the nozzle assembly (10) is a nozzle assembly according to any one of claims 1 to 8, the nozzle assembly (10) being arranged in an axial direction of the endoscope lens mount (20).

10. An endoscope, characterized by comprising a handle (30), an insertion portion (40) and a display device, wherein the distal end of the insertion portion (40) is provided with the endoscope front end assembly according to claim 9, the handle (30) is connected with the insertion portion (40), and the handle (30) is also connected with the display device.