CN116784783B - Nozzle, front end assembly and endoscope - Google Patents

Abstract

The application provides a nozzle, a front end assembly and an endoscope, and belongs to the technical field of endoscopes. The nozzle comprises a nozzle seat and a moving piece, wherein an installation cavity, a first sub-channel and a second sub-channel which are communicated with the installation cavity are arranged in the nozzle seat, one of the first sub-channel and the second sub-channel is used for cleaning the surface of a lens, and the other is used for cleaning the inner wall of the cavity; the moving piece is provided with a fluid channel, a fluid inlet and a fluid outlet which are communicated with the fluid channel, the fluid outlet is arranged on the circumferential side wall of the moving piece, and the moving piece is movably arranged in the mounting cavity; the moving part is provided with a first position and a second position relative to the nozzle seat, and the fluid outlet is communicated with the first sub-channel under the condition that the moving part is positioned at the first position; the fluid outlet communicates with the second sub-channel with the movable member in the second position. According to the application, the fluid channel is communicated with the first sub-channel or the second sub-channel by controlling the moving part, so that the lens cleaning operation or the cavity cleaning operation is switched.

Description

Nozzle, front end assembly and endoscope

Technical Field

The application belongs to the technical field of endoscopes, and particularly relates to a nozzle, a front end assembly and an endoscope.

Background

The endoscope is used as a medical diagnosis instrument and comprises a front end component, the front end component can enter a human body through a human body cavity or an operation incision, and image information of a focus is acquired through a camera module packaged on the front end component, so that sufficient diagnosis information is provided for doctors to treat diseases.

However, in the process of acquiring the image information of the focus by the camera module, the situation that tissue fluid adheres to the lens surface of the camera module or the inner wall of a cavity at the focus exists in the human body, so that the camera module cannot acquire the clear image information of the focus, and inconvenience is brought to disease diagnosis and treatment.

Disclosure of Invention

The application aims to provide a nozzle, a front end assembly and an endoscope, which solve the technical problems in the prior art.

The application is realized in the following way:

in a first aspect, the present application provides a nozzle for an endoscope, the nozzle including a nozzle holder, a moving member, and a traction structure, the nozzle holder having a mounting cavity therein, a first sub-channel and a second sub-channel, the mounting cavity being in communication with the first sub-channel and the second sub-channel, respectively, one of the first sub-channel and the second sub-channel being for cleaning a lens surface, the other being for cleaning an inner wall of the cavity; the movable piece is provided with a fluid channel, a fluid inlet and a fluid outlet which are communicated with the fluid channel, the fluid outlet is arranged on the circumferential side wall of the movable piece, and the movable piece is movably arranged in the mounting cavity; one end of the traction structure is fixed with the moving part, the other end of the traction structure extends towards the proximal end of the endoscope, and the traction structure is used for driving the moving part to move in the mounting cavity; the moving part is provided with a first position and a second position relative to the nozzle seat, and the fluid outlet is communicated with the first sub-channel and is blocked from the second sub-channel under the condition that the moving part is positioned at the first position; and when the moving part is positioned at the second position, the fluid outlet is communicated with the second sub-channel and is blocked from the first sub-channel.

In a second aspect, the present application provides a front end assembly comprising a lens mount and the nozzle of the first aspect, the nozzle mount of the nozzle being secured to the lens mount.

In a third aspect, the present application provides an endoscope comprising the front end assembly provided in the second aspect.

The technical scheme provided by the application can achieve the following beneficial effects:

according to the application, the first sub-channel and the second sub-channel are arranged in the nozzle seat to form the channel for the cleaning liquid to spray out, and the two sub-channels are respectively used for cleaning the surface of the lens and the inner wall of the cavity so as to remove tissue liquid attached to the surface of the lens and the inner wall of the cavity, so that the imaging quality of the camera module is improved. The movable part is movably arranged in the mounting cavity of the nozzle seat, and the relative position of the movable part and the nozzle seat is controlled by changing the position of the movable part in the mounting cavity, so that the fluid outlet of the fluid channel can be selectively communicated with the first sub-channel or the second sub-channel, the purposes of spraying the cleaning fluid from different sub-channels and cleaning the surface of a lens or the tissue of the inner wall of the cavity are achieved, and the convenience of controlling the nozzle is improved. In addition, the fluid channel is arranged in the moving part, so that in the process of conveying the cleaning liquid, the number of curves through which the cleaning liquid passes is small, and the conveying of the cleaning liquid is smoother.

Drawings

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

FIG. 1 is a schematic view of the overall structure of a nozzle according to some embodiments of the present application;

FIG. 2 is a partial cross-sectional view of a nozzle with a movable member in a first position provided in some embodiments of the application;

FIG. 3 is a partial cross-sectional view of a nozzle with a movable member in a third position according to some embodiments of the present application;

FIG. 4 is a partial cross-sectional view of a nozzle with a moving member in a second position provided by some embodiments of the application;

FIG. 5 is a bottom view of a nozzle according to some embodiments of the application;

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

FIG. 7 is a bottom view of a second nozzle provided in some embodiments of the application;

FIG. 8 is a cross-sectional view B-B in FIG. 7;

FIG. 9 is a bottom view of a nozzle holder provided in some embodiments of the application;

FIG. 10 is a cross-sectional view of C-C in FIG. 9;

FIG. 11 is a schematic view of the overall structure of a mobile unit according to some embodiments of the present application;

FIG. 12 is a schematic view of a nozzle holder according to some embodiments of the present application;

fig. 13 is a schematic view illustrating the cooperation between a lens holder and a nozzle according to some embodiments of the present application.

In the figure: 100-nozzle holder, 110-mounting chamber, 111-first subchamber, 120-first subchannel, 130-second subchannel, 140-chute, 150-first opening, 160-second opening, 170-blocking area, 181-first holder, 182-second holder, 183-third holder, 184-fourth holder, 200-mover, 210-fluid channel, 211-fluid inlet, 212-fluid outlet, 212 a-first subchamber, 212 b-second subchamber, 220-boss, 300-elastic member, 400-bellows, 500-traction structure, 600-lens holder.

Detailed Description

The following description provides many different embodiments, or examples, for implementing different features of the application. The elements and arrangements described in the following specific examples are presented for purposes of brevity and are provided only as examples and are not intended to limit the application.

In the embodiments of the present application, "proximal" and "distal" refer to the endoscope and its accessories in the use environment, with respect to the user's near-far position, wherein the end closer to the user is designated as "proximal" and the end farther from the user is designated as "distal".

The embodiment of the application provides a nozzle, which is applied to an endoscope and is shown in fig. 1 to 12, and the nozzle comprises a nozzle seat 100 and a moving member 200, and the aim of jetting cleaning liquid from different nozzles of the nozzle seat 100 and respectively cleaning the surface of a lens and the inner wall of a cavity is fulfilled by changing the position of the moving member 200 relative to the nozzle seat 100.

According to some alternative embodiments, as can be seen with reference to fig. 2, the interior of the nozzle holder 100 is provided with a mounting cavity 110, a first sub-channel 120 and a second sub-channel 130. The installation cavity 110 is used for installing the moving member 200 as an installation space where the moving member 200 moves. The mounting cavity 110 communicates with a first sub-channel 120 and a second sub-channel 130, respectively, one of the first sub-channel 120 and the second sub-channel 130 being used for cleaning the lens surface and the other being used for cleaning the cavity inner wall. Specifically, the proximal end of the first sub-channel 120 is in communication with the mounting cavity 110, and the distal end thereof extends through the nozzle holder 100, and may extend through the distal surface of the nozzle holder 100, or may extend through the sidewall of the nozzle holder 100, so as to determine the target position of the first sub-channel 120 to be cleaned during specific use. The proximal end of the second sub-channel 130 communicates with the mounting cavity 110, and the distal end thereof extends through the nozzle holder 100, and may extend through the distal end surface of the nozzle holder 100, or may extend through the sidewall of the nozzle holder 100, so as to determine the target position of the first sub-channel 120 to be cleaned during specific use.

The proximal ends of the first sub-channel 120 and the second sub-channel 130 are communicated with the mounting cavity 110, and the distal ends form a nozzle for spraying the cleaning liquid. One of the nozzle of the first sub-channel 120 and the nozzle of the second sub-channel 130 faces the lens so that the cleaning liquid ejected from the nozzle can clean the surface of the lens. Illustratively, the lens surface refers to the view-finding end face of the lens. The other nozzle is oriented to the inner wall of the cavity so that the cleaning liquid passing through the nozzle can wash the inner wall of the cavity at the target position. The inner wall of the lumen refers to the target tissue of the endoscope that needs to be diagnosed during the diagnostic procedure. The target tissue may be, for example, a human tissue inner wall surface, such as a bronchial wall, an inner wall of the alimentary canal, but may be an inner wall of other lumens.

The structure of the moving member 200 may be as shown with reference to fig. 2 and 11, in which a fluid passage 210 is provided inside the moving member 200, the fluid passage 210 having a fluid inlet 211 and a fluid outlet 212. The fluid inlet 211 is used for connecting with a cleaning fluid transfer pipe, i.e. a pipe for transferring cleaning fluid, through which the cleaning fluid enters the fluid channel 210. Fluid outlets 212 are provided in the circumferential side wall of the moving member 200, the fluid outlets 212 being for communication with the sub-channels. The moving member 200 is movably disposed in the mounting cavity 110, and the moving member 200 can move in the mounting cavity 110 under the action of an external force to change the relative positions of the moving member 200 and the nozzle holder 100.

Illustratively, in the case of a nozzle for an endoscope, the cleaning fluid delivery tube extends from the nozzle holder 100 along the insertion portion of the endoscope toward the endoscope handle. In an alternative embodiment, the nozzle may be connected to a cleaning liquid pump by a cleaning liquid delivery tube so that the pump may deliver cleaning liquid to the nozzle along a conduit.

The cleaning fluid enters the fluid channel 210 of the moving member 200 through the fluid inlet 211 and flows into the mounting cavity 110 through the fluid outlet 212. The moving member 200 is disposed in the installation cavity 110, and the cavity wall of the installation cavity 110 blocks the fluid outlet 212 of the moving member 200 to block the cleaning solution from entering the installation cavity 110. Only after the fluid outlet 212 communicates with the first sub-channel 120 or the second sub-channel 130 on the mounting cavity 110, the cleaning fluid may enter the first sub-channel 120 or the second sub-channel 130 through the fluid outlet 212.

In some embodiments of the application, the moveable member 200 has a first position and a second position relative to the nozzle holder 100. When the moving member 200 is at the first position, the fluid outlet 212 is in communication with the first sub-channel 120, the cleaning fluid in the fluid channel 210 can enter the first sub-channel 120 through the fluid outlet 212 and be ejected from the nozzle at the distal end of the first sub-channel 120, and meanwhile, the circumferential sidewall of the moving member 200 is attached to the proximal end of the second sub-channel 130, so that the fluid outlet 212 is isolated from the second sub-channel 130, and the cleaning fluid only passes through the first sub-channel 120.

When the moving member 200 is at the second position, the fluid outlet 212 is in communication with the second sub-channel 130, the cleaning fluid in the fluid channel 210 can enter the second sub-channel 130 through the fluid outlet 212 and be ejected from the nozzle at the distal end of the second sub-channel 130, and meanwhile, the circumferential sidewall of the moving member 200 is attached to the proximal end of the first sub-channel 120, so that the fluid outlet 212 is isolated from the first sub-channel 120, and the cleaning fluid only passes through the second sub-channel 130.

In the above embodiment, one of the nozzle formed by the first sub-channel 120 and the nozzle formed by the second sub-channel 130 faces the lens, and the other faces the target tissue, so that the spraying operation can be performed on the lens and the target tissue respectively. Therefore, the nozzle provided by the embodiment can be used for cleaning the lens and cleaning the target tissue. In some alternative embodiments, in the case of a foreign object attached lens, the moving member 200 may be moved to the first position so that the cleaning liquid may be ejected from the nozzle formed by the first sub-channel 120 to clean the lens. In the case that foreign substances are attached to the target tissue, the moving member 200 may be moved to the second position so that the washing liquid may be sprayed from the spray port formed in the second sub-passage 130 to wash the target tissue. Among them, foreign substances include, but are not limited to, interstitial fluid, mucus, and the like in the body. Therefore, the nozzle provided by the embodiment can be used for cleaning foreign matters attached to a lens or target tissues so as to improve the cleanliness of the working environment of the camera module, improve the imaging quality of the camera module and be more beneficial to diagnosis of diseases by doctors.

Because the nozzle is in the process of switching the nozzle, the whole switching process is realized by controlling the position change of the moving member 200, the pressure of the cleaning fluid in the fluid channel 210 is not required to be changed, the pressure of the cleaning fluid in the nozzle can be maintained relatively stable, the condition of abrupt change of the pressure of the cleaning fluid is avoided, and the cleaning fluid can be ensured to smoothly flush the surface of the lens and the inner wall of the cavity.

In addition, the fluid channel 210 is arranged inside the moving member 200, and the cleaning fluid is directly conveyed into the fluid channel 210 through the cleaning fluid conveying pipe, so that less curves are required for the cleaning fluid to pass through in the process of conveying the cleaning fluid, and the cleaning fluid is conveyed more smoothly.

In addition, the moving member 200 further has a third position between the first position and the second position, and the third position is located between the first position and the second position, and when the moving member 200 is located in the third position, the fluid outlet 212 can simultaneously communicate with the first sub-channel 120 and the second sub-channel 130, and the cleaning solution simultaneously washes the lens surface and the inner wall of the cavity.

In some alternative embodiments, the first sub-channel 120 may correspond to a flushing lens surface and the second sub-channel 130 may correspond to a flushing lumen inner wall. The distal opening of the second sub-channel 130 is located at the distal end surface of the nozzle holder 100, so as to facilitate flushing of the inner wall of the cavity in front of the lens holder 600. Since the lens holder 600 and the nozzle are both located at the distal end face of the lens holder 600, the sidewall of the lens holder 600 will generally be provided with a groove, and the distal opening of the first sub-channel 120 is located in the groove, as shown in fig. 1, and the cleaning solution can be reversed after entering the groove, so as to be convenient for impacting the surface of the lens holder 600. The groove is provided with the fan-shaped opening, so that the sprayed cleaning liquid is sprayed in a fan shape, a wider range can be conveniently covered, and the surface of the lens can be washed thoroughly. In alternative embodiments, the first sub-channel 120 may flush the inner wall of the cavity and the second sub-channel 130 may flush the lens surface.

In some alternative embodiments, only one fluid opening may be provided, and the proximal opening of the first sub-channel 120 and the proximal opening of the second sub-channel 130 may be disposed in a staggered manner on the moving track of the moving member 200, so that the moving member 200 is respectively in communication with the two sub-channels during the moving process in the track direction thereof. It will be appreciated that the proximal opening of the first sub-channel 120 is offset from the proximal opening of the second sub-channel 130, which means that the proximal openings of the two sub-channels are at different distances from the proximal end of the moving member 200, so that the two sub-channels are offset. The moving track of the moving member 200 is a track formed by moving the moving member 200 between the first position and the second position. The moving direction of the moving member 200 is the same as the axial direction of the mounting chamber 110. In the case where the mover 200 is moved to the third position between the first position and the second position, i.e., in the case where the fluid opening is located in the middle of the proximal ends of the two sub-channels, the fluid opening may communicate with both sub-channels at the same time. Illustratively, the proximal opening of the first sub-channel 120 and the proximal opening of the second sub-channel 130 may be in different circumferential directions of the moving member 200, or both openings may be in the same circumferential direction of the moving member 200.

In other alternative embodiments, there may be two fluid outlets 212, including a first sub-outlet 212a and a second sub-outlet 212b, where the first sub-outlet 212a and the second sub-outlet 212b are spaced apart along the circumferential direction of the moving member 200, the first sub-outlet 212a corresponds to the first sub-channel 120, and the second sub-outlet 212b corresponds to the second sub-channel 130. The two sub-channels respectively correspond to one sub-outlet, and compared with the nozzle structure with only one fluid outlet 212, the fluid outlet 212 is fully utilized, and useless openings on the side wall of the moving member 200 can be avoided, so that the sealing performance between the moving member 200 and the mounting cavity 110 is improved.

As shown in fig. 2 and 3, the first sub-outlet 212a and the first sub-channel 120 are arranged along the movement track of the moving member 200, and the moving member 200 can enable the fluid channel 210 to communicate with the first sub-channel 120 through the first sub-outlet 212a during the movement process. As shown in conjunction with fig. 3 and 4, the second sub-outlet 212b and the second sub-channel 130 are arranged along the moving track of the moving member 200, so that the fluid channel 210 can communicate with the second sub-channel 130 through the second sub-outlet 212 b. Wherein fig. 2 shows the case where the first sub-outlet 212a communicates with the first sub-channel 120 with the mover 200 in the first position; fig. 3 shows the case where the first sub-outlet 212a communicates with the first sub-channel 120 and the second sub-outlet 212b communicates with the second sub-channel 130 with the mover 200 in the third position; fig. 4 shows a case where the second sub-outlet 212b communicates with the second sub-passage 130 with the mover 200 in the second position.

In some alternative embodiments, the nozzle holder 100 and the moving member 200 are both in a columnar structure, the mounting cavity 110, the first sub-channel 120 and the second sub-channel 130 are all disposed along the axial direction of the nozzle holder 100, the fluid channel 210 is disposed along the axial direction of the moving member 200, the moving member 200 is disposed in the mounting cavity 110 along the axial direction of the mounting cavity 110, and the fluid inlet 211 of the moving member 200 is located at the proximal end face of the moving member 200, so as to be connected to the cleaning liquid delivery tube. The first position, the second position, and the third position of the moving member 200 are all aligned in the axial direction of the nozzle holder 100. In an exemplary manner, the moving member 200 moves in a direction away from the distal end of the nozzle holder 100 during the moving process, and as shown in fig. 2 to 4, the moving member 200 gradually moves away from the distal end of the nozzle holder 100, the length of the portion of the moving member 200 located outside the nozzle holder 100 increases, the communication relationship between the first sub-opening and the second sub-opening of the moving member 200 and the first sub-channel 120 and the second sub-channel 130 changes, and the moving member 200 moves from the first position to the third position and then to the second position. In other alternative embodiments, the axial directions of the mounting cavity 110, the first sub-channel 120 and the second sub-channel 130 may be inclined with respect to the axial direction of the nozzle holder 100, and the movement track of the moving member 200 may be inclined with respect to the axial direction of the nozzle holder 100.

Referring to fig. 9 and 10, the structure of the nozzle holder 100 may be shown, where the nozzle holder 100 further includes a first opening 150 and a second opening 160 disposed on a sidewall of the mounting cavity 110, the first opening 150 is communicated with the first sub-channel 120, the first opening 150 is a proximal opening of the first sub-channel 120, the second opening 160 is communicated with the second sub-channel 130, and the second opening 160 is a proximal opening of the second sub-channel 130. The second opening 160 is disposed on a proximal side of the first opening 150, and a blocking area 170 is disposed between a distal end of the second opening 160 and a proximal end of the first opening 150 along a moving direction of the moving member 200. The presence of the blocking area 170 may prevent a series flow between the two sub-channels, improving the sealing performance between the two sub-channels. If the proximal openings of the two sub-channels are too close, in the case that the fluid channel 210 is in communication with one of the sub-channels, after the cleaning fluid in the fluid channel 210 flows out from the fluid outlet 212, the liquid easily enters the other sub-channel due to the too close distance of the two sub-channels, so that a series flow occurs between the two sub-channels, and the ejection of the cleaning fluid is affected.

There are various arrangements of the first opening 150, the second opening 160, the first sub-outlet 212a, and the second sub-outlet 212 b. In some alternative embodiments, the first opening 150 and the second opening 160 may be located at the same height of the mounting cavity 110, where the first sub-outlet 212a and the second sub-outlet 212b are located at a staggered position on the moving track of the moving member 200, and the distance between the proximal end of the second sub-outlet 212b and the proximal end of the moving member 200 is different, so that the two sub-outlets are respectively communicated with the two sub-channels, so that the two sub-outlets and the two sub-channels are simultaneously communicated, and the proximal end of one sub-outlet is located within the range of two ends of the other sub-outlet while the two sub-outlets are located at a staggered position, as shown in fig. 11, that is, the distance between the proximal end of the first sub-outlet 212a and the proximal end of the moving member 200 is greater than the distance between the proximal end of the second sub-outlet 212b and the proximal end of the moving member 200 is smaller than the distance between the distal end of the second sub-outlet 212b and the proximal end of the moving member 200. In other alternative embodiments, the first opening 150 and the second opening 160 may be offset in the axial direction of the mounting cavity 110, and the first sub-outlet 212a and the second sub-outlet 212b may be located at the same height of the moving member 200. In other embodiments, referring to fig. 10, the first and second openings 150 and 160 may be offset in the axial direction of the mounting cavity 110. Referring to fig. 11, the first sub-outlet 212a and the second sub-outlet 212b are disposed in a staggered manner on the moving track of the moving member 200.

The proximal end of the displacement member 200 is typically provided with a fluid inlet 211, which is connected to a cleaning fluid delivery tube for the ingress of cleaning fluid. In the case that the nozzle is mounted on the lens holder 600, the nozzle holder 100 of the nozzle is fixed to the lens holder 600, and in order to ensure that the cleaning liquid delivery tube is smoothly connected to the pump, the position of the cleaning liquid delivery tube needs to be maintained stable in the insertion portion of the endoscope, so that the cleaning liquid delivery tube is prevented from moving in the axial direction thereof in the insertion portion of the endoscope. Since the relative position of the moving member 200 and the nozzle holder 100 is changed during the moving process of the moving member 200 in the mounting cavity 110, the moving member 200 drives the cleaning solution transmission tube to move, so that the proximal end of the moving member 200 and the cleaning solution transmission tube cannot be stably connected, and the normal entering of the cleaning solution is affected. Thus, in some embodiments of the present application, the bellows 400 is connected to the proximal end of the moving member 200, the distal end of the bellows 400 is fixed to the moving member 200, the proximal end of the bellows 400 is fixed to the lens holder 600, and the lumen of the bellows 400 is in communication with the fluid channel 210 of the moving member 200 for the cleaning fluid to pass through. Since the bellows 400 has a foldable property, the bellows 400 can be folded or stretched along the axial direction thereof under the driving of an external force to match the position change of the moving member 200, the position of the cleaning liquid transfer tube does not move during the axial length change of the bellows 400, the connection between the bellows 400 and the moving member 200 and the cleaning liquid transfer tube can be kept stable, and the cleaning liquid can smoothly enter the bellows 400 from the cleaning liquid transfer tube and then enter the fluid passage 210.

Since the moving member 200 must be moved in a predetermined moving direction in use, the fluid outlet 212 is communicated with the corresponding sub-channel. Thus, in some embodiments of the present application, a positioning structure is provided between the moving member 200 and the nozzle holder 100 such that the moving member 200 moves in a predetermined direction. Illustratively, the sliding slot 140 is provided on either one of the moving member 200 and the nozzle holder 100, the protrusion 220 is provided on the other, the protrusion 220 is at least partially located in the sliding slot 140, and the protrusion 220 is slidably engaged with the sliding slot 140 to limit the moving direction of the moving member 200, so that the moving member 200 can only move in accordance with the sliding direction of the protrusion 220 in the sliding slot 140, thereby achieving the purpose of limiting the moving member 200 to move in a predetermined direction. Referring to fig. 6, 8, 10 and 11, the protrusion 220 is provided at a circumferential side wall of the moving member 200, and the sliding groove 140 communicates with the mounting cavity 110, thereby facilitating assembly of the moving member 200 with the nozzle holder 100.

In addition, some embodiments of the present application provide a nozzle further including an elastic member 300, wherein one end of the elastic member 300 is connected to the nozzle holder 100, and the other end of the elastic member 300 is connected to the moving member 200, and the elastic member 300 can act on the moving member 200 to move from the second position to the first position. Similarly, the elastic member 300 can also act to move the moving member 200 from the third position to the first position and from the second position to the third position. When the moving member 200 moves from the first position toward the second position, the elastic member 300 can be compressed, and after the external force for operating the moving member 200 is removed, the compressed elastic member 300 drives the moving member 200 to move to the first position.

For example, the elastic member 300 may be sleeved outside the moving member 200, the installation cavity 110 has a first sub-chamber 111, and referring to fig. 6, 8 and 10, the radial dimension of the first sub-chamber 111 is greater than the radial dimension of the installation cavity 110, and the elastic member 300 is located in the first sub-chamber 111. One end of the elastic member 300 is abutted on a step surface formed between the first sub-chamber 111 and the mounting cavity 110, and the other end of the elastic member is fixed with the side wall of the moving member 200, or a corresponding protrusion is arranged on the moving member 200, and the end of the elastic member 300 is abutted with the corresponding protrusion, so that the elastic member 300 can drive the moving member 200 to move.

To facilitate control of the moveable member 200, some embodiments of the present application provide a nozzle further comprising a traction structure 500, one end of the traction structure 500 being fixed to the moveable member 200 and the other end extending toward the proximal end of the endoscope, facilitating use of the traction structure 500 by a user. For example, the traction structure 500 may be a traction rope, with which movement of the mover 200 is controlled. The traction rope may be fixed on both the outer side wall and the inner side wall of the moving member 200, and the traction rope may also be fixed on the proximal end surface of the moving member 200.

In an alternative embodiment, as shown with reference to fig. 5 and 6, the traction structure 500 is fixed to the inner sidewall of the mover 200. Because the movable member 200 has a certain wall thickness, the traction structure 500 is fixed in the inner wall of the movable member 200 with respect to the structure in which the traction structure 500 is fixed to the outer sidewall of the movable member 200, so that the traction structure 500 is as close to the axis of the movable member 200 as possible. With this arrangement, the force applied to the moving member 200 is balanced during the process of pulling the traction structure 500 to move the moving member 200, which is beneficial to reducing the sliding resistance of the moving member 200 relative to the mounting cavity 110.

In alternative embodiments, and referring to fig. 7 and 8, a traction structure 500 is fixed to the outer sidewall of the moving member 200, and the traction structure 500 is located outside the cleaning solution delivery tube to which the moving member 200 is connected. Because the traction structure 500 is positioned outside the cleaning solution transmission pipe, on one hand, the traction structure 500 does not occupy the space of the cleaning solution transmission pipe, and the cleaning solution transmission pipe can transmit more cleaning solution; on the other hand, there is no contact between the traction structure 500 and the cleaning solution, and since the traction structure 500 is generally made of metal, damage to the traction structure 500 caused by long-term contact between the traction structure 500 and the cleaning solution can be avoided.

Because the nozzle holder 100 is provided with a plurality of channels, in order to facilitate the die drawing of the nozzle holder 100, the nozzle holder 100 may be divided into four parts along the axial direction thereof, and the nozzle holder 100 may be sequentially divided into a first holder 181, a second holder 182, a third holder 183, and a fourth holder 184 along the direction from the distal end to the proximal end of the nozzle holder 100, as shown in fig. 12. The first seat 181 is mainly provided with distal opening positions of the first sub-channel 120 and the second sub-channel 130, so that the cleaning fluid sprayed from the first sub-channel 120 and the second sub-channel 130 can clean a preset target along a preset direction, and the mounting cavity 110 has a blind hole structure in the first seat 181. The second seat 182 has a mounting cavity 110, a first sub-channel 120 and a second sub-channel 130, and the second seat 182 and the first seat 181 may be manufactured as an integral structure. Referring to fig. 10, in the third housing 183, the first opening 150 and the second opening 160 of the mounting cavity 110 are located in the third housing 183, and the first sub-channel 120 and the second sub-channel 130 are blind holes in the third housing 183. The fourth housing 184 is provided with a mounting cavity 110, and the mounting cavity 110 penetrates the fourth housing 184. When the nozzle holder 100 is assembled, a sealing structure is disposed between the holders, so that the connection positions of the first sub-channel 120, the second sub-channel 130, and the mounting cavity 110 between the holders are relatively independent, and series flow is avoided. The sealing structure can be an elastic sealing element or a convex and concave structure arranged between the seat bodies, so that the channels are relatively independent.

Referring to fig. 10 and 12, the chute 140 is disposed on the fourth housing 184, so as to facilitate processing of the fourth housing 184. The first sub-chamber 111 is also located in the fourth seat 184, and since the first sub-channel 120 and the second sub-channel 130 are not disposed in the fourth seat 184, the chute 140 and the first sub-chamber 111 are disposed in the fourth seat 184, which can avoid influencing the design of the sub-channel.

In some embodiments of the present application, the radial dimension of the first sub-channel 120 and the radial dimension of the second sub-channel 130 are smaller than the radial dimension of the fluid channel 210, and the radial dimension of the first sub-channel 120 is equal to the radial dimension of the second sub-channel 130, as shown in fig. 12. With this arrangement, the flow rate of the cleaning fluid entering the first sub-channel 120 and the second sub-channel 130 can be equal as much as possible, so as to facilitate cleaning the lens surface and the inner wall of the cavity. If the radial dimensions of the two sub-channels are different, the flow rate of the cleaning fluid in the two sub-channels will obviously change during the movement of the moving member 200, which is not beneficial to use, and if the ejected flow rate is too large, the loss of the inner wall of the cavity, the mucosa and the like is easy to cause discomfort to the patient.

And/or, on any cross section of the nozzle, the line between the center point of the fluid channel 210, the center point of the first sub-channel 120, and the center point of the second sub-channel 130 is in an isosceles triangle structure. It is understood that any cross section refers to a cross section of the nozzle in the radial direction of the nozzle. The two sub-channels and the mounting cavity 110 are arranged in an isosceles triangle, so that the radial size of the required nozzle holder 100 can be reduced, and the radial size of the corresponding nozzle mounting hole on the lens holder 600 is reduced, which is more beneficial to the layout of the lens holder 600.

Some embodiments of the present application further provide a front end assembly, as shown in fig. 13, including a lens holder 600 and a nozzle provided in any of the foregoing embodiments, wherein a nozzle mounting hole is provided on the lens holder 600, the nozzle is mounted in the nozzle mounting hole, and the nozzle holder 100 of the nozzle is fixedly disposed with the lens holder 600, so as to facilitate the movement of the moving member 200.

In some embodiments of the present application, the axial direction of the nozzle mounting hole is the same as the axial direction of the lens holder 600, so that the occupation of the space of the lens holder 600 by the nozzle holder 100 can be reduced as much as possible, so that other channels in the lens holder 600 can be laid out more reasonably.

It should be noted that, in the process of installing the nozzle on the lens holder 600, the nozzle needs to face the mounting hole of the camera module on the lens holder 600 to wash the lens surface.

Embodiments of the present application provide an endoscope comprising the front end assembly of any of the previous embodiments. The endoscope of the embodiment of the application can be a bronchoscope, a nephroscope, an esophagoscope, a gastroscope, a enteroscope, an otoscope, a nasoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope and the like, and the embodiment of the application does not limit the type of the endoscope.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (9)

1. A nozzle for use with an endoscope, comprising:

a nozzle holder (100), wherein a mounting cavity (110), a first sub-channel (120) and a second sub-channel (130) are arranged in the nozzle holder (100), the mounting cavity (110) is respectively communicated with the first sub-channel (120) and the second sub-channel (130), one of the first sub-channel (120) and the second sub-channel (130) is used for cleaning the surface of a lens, and the other is used for cleaning the inner wall of the cavity;

a moving member (200), wherein the moving member (200) is provided with a fluid channel (210), a fluid inlet (211) and a fluid outlet (212) which are communicated with the fluid channel (210), the fluid outlet (212) is arranged on the circumferential side wall of the moving member (200), and the moving member (200) is movably arranged in the mounting cavity (110);

a traction structure (500), wherein one end of the traction structure (500) is fixed with the moving member (200), the other end of the traction structure extends towards the proximal end of the endoscope, and the traction structure (500) is used for driving the moving member (200) to move in the mounting cavity (110);

the moving member (200) has a first position and a second position relative to the nozzle holder (100), and the fluid outlet (212) is in communication with the first sub-channel (120) and is blocked from the second sub-channel (130) when the moving member (200) is in the first position; -said fluid outlet (212) is in communication with said second sub-channel (130) and is blocked from said first sub-channel (120) with said moving member (200) in a second position;

the fluid outlet (212) comprises a first sub-outlet (212 a) and a second sub-outlet (212 b), and the first sub-outlet (212 a) and the second sub-outlet (212 b) are arranged at intervals along the circumferential direction of the moving member (200);

the first sub-outlet (212 a) and the first sub-channel (120) are arranged along the moving track of the moving member (200), and the fluid channel (210) can be communicated with the first sub-channel (120) through the first sub-outlet (212 a);

the second sub-outlet (212 b) and the second sub-channel (130) are arranged along the moving track of the moving member (200), and the fluid channel (210) can be communicated with the second sub-channel (130) through the second sub-outlet (212 b).

2. A nozzle as claimed in claim 1, wherein,

the moving member (200) also has a third position relative to the nozzle holder (100) between the first and second positions, with the fluid outlet (212) communicating with both the first and second sub-channels (120, 130) with the moving member (200) in the third position.

3. A nozzle as claimed in claim 1, wherein,

the nozzle holder (100) further comprises a first opening (150) and a second opening (160) which are arranged on the side wall of the mounting cavity (110), the first opening (150) is communicated with the first sub-channel (120), the second opening (160) is communicated with the second sub-channel (130), the second opening (160) is distributed on the proximal side of the first opening (150) and along the moving direction of the moving piece (200), and a blocking area (170) is arranged between the distal end of the second opening (160) and the proximal end of the first opening (150).

4. A nozzle as claimed in claim 1, wherein,

the device further comprises an elastic piece (300), wherein one end of the elastic piece (300) is connected with the nozzle seat (100), the other end of the elastic piece is connected with the moving piece (200), and the elastic piece (300) can act on the moving piece (200) to move from the second position to the first position;

and/or, one of the nozzle seat (100) and the moving member (200) is provided with a chute (140), the other is provided with a protruding part (220), at least part of the protruding part (220) is positioned in the chute (140), and the protruding part (220) is in sliding fit with the chute (140).

5. A nozzle as claimed in claim 1, wherein,

the nozzle further comprises a bellows (400), a distal end of the bellows (400) is connected to the moving member (200), and the fluid passage (210) communicates with a lumen of the bellows (400) through the fluid inlet (211).

6. A nozzle as claimed in claim 1, wherein,

the radial dimension of the first sub-channel (120) and the radial dimension of the second sub-channel (130) are both smaller than the radial dimension of the fluid channel (210), and the radial dimension of the first sub-channel (120) is equal to the radial dimension of the second sub-channel (130).

7. A nozzle as claimed in claim 1, wherein,

on any cross section of the nozzle, a connecting line among a center point of the fluid channel (210), a center point of the first sub-channel (120) and a center point of the second sub-channel (130) is in an isosceles triangle structure.

8. A front end assembly comprising a lens mount (600) and the nozzle of any of claims 1-7, the nozzle mount (100) of the nozzle being secured to the lens mount (600).

9. An endoscope comprising the tip assembly of claim 8.