Auditory meatus flushing negative pressure suction device

Abstract

The invention discloses a negative pressure suction device for ear canal flushing. The negative pressure suction device comprises a handheld shell, a fluid channel assembly, a sealing adapter, a cleaning fluid supply unit and a negative pressure generation unit. A cavity is formed in the handheld shell; the fluid channel assembly penetrates through the cavity, the two ends of the fluid channel assembly extend out of the head and the tail of the handheld shell respectively, and the fluid channel assembly is provided with a cleaning fluid nozzle and a negative pressure suction port close to the head and communicated with a flushing channel and a negative pressure channel which are isolated from each other in the fluid channel assembly respectively. The sealing adapter is arranged at the tail of the handheld shell and used for being connected with the fluid channel assembly and guiding a flushing channel and a negative pressure channel of the fluid channel assembly to corresponding external interfaces after the flushing channel and the negative pressure channel are isolated. The cleaning fluid supply unit is communicated with the flushing channel to provide cleaning fluid; the negative pressure generating unit is communicated with the negative pressure channel to provide negative pressure power. According to the auditory meatus flushing device, through the physically-isolated double-channel design and a flushing and suction mechanism working synchronously, flushing fluid residues and cross contamination are effectively avoided, and the safety, efficiency and reliability of auditory meatus flushing operation are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an ear canal flushing negative pressure suction device. BACKGROUND

[0002] The ear canal flushing negative pressure suction device is an integrated device for otology diagnosis and treatment, which aims to disperse cerumen, pus and other pollutants in the ear canal through the flow of flushing liquid, and to discharge waste liquid with the help of negative pressure to prevent residue. It usually includes independent flushing pipeline and negative pressure suction pipeline, which are connected with flushing liquid source and negative pressure device respectively. The two pipelines are merged or arranged side by side near the operating end. In the conventional operation, the operator needs to control the flushing and suction functions alternately or separately, relying on the flow of flushing liquid and subsequent suction to complete the cleaning. This device is widely used in the scenes of cerumen cleaning and secretion removal in otolaryngology clinics.

[0003] The existing ear canal flushing negative pressure suction device integrates flushing and suction functions in the same device, but because the pipelines are independent and separated and the outlet spacing is large, when dealing with stubborn or large foreign matter, the flushing liquid is easy to remain in the deep part of the ear canal and is difficult to be sucked out in time, resulting in prolonged operation time and patient discomfort. At the same time, the liquid flow is not synchronized with suction, which is easy to cause liquid droplets to splash or pollutants to be pushed to a deeper position, and there is a risk of cross infection and tympanic membrane stimulation. SUMMARY

[0004] The main purpose of the present application is to provide an ear canal flushing negative pressure suction device, which aims to solve the problems of liquid residue, low operation efficiency and the risk of tympanic membrane damage caused by the asynchronization of flushing and suction in the existing ear canal flushing negative pressure suction device.

[0005] To achieve the above-mentioned purpose, the present application provides an ear canal flushing negative pressure suction device, which comprises: A hand-held shell, a cavity is arranged in the hand-held shell; A fluid channel assembly, which passes through the cavity in the hand-held shell and extends out of the head and tail of the hand-held shell at both ends, wherein a cleaning liquid nozzle for flushing the ear canal and a negative pressure suction nozzle for absorbing the cleaning liquid are arranged on the fluid channel assembly near the head of the hand-held shell, the cleaning liquid nozzle is connected with a flushing channel, and the negative pressure suction nozzle is connected with a negative pressure channel; A sealing adapter, which is arranged at the tail of the hand-held shell, is used to connect the fluid channel assembly and isolate the flushing channel and the negative pressure channel on the fluid channel assembly, and is respectively guided to the corresponding external interface; A cleaning liquid supply unit, which is in communication with the flushing channel on the fluid channel assembly to provide cleaning liquid; A negative pressure generating unit, which is in communication with the negative pressure channel on the fluid channel assembly to provide negative pressure power.

[0006] As optional, the fluid channel assembly comprises an inner tube as the flushing channel and an outer tube as the negative pressure channel, the inner tube and the outer tube are concentrically fixed by four radial support ribs which are uniformly distributed along the axial direction, the support ribs are integrally formed with the inner wall of the outer tube and are in interference fit with the outer wall of the inner tube, so that the outer wall of the inner tube and the inner wall of the outer tube form four drainage channels with crescent cross section.

[0007] As optional, the flushing liquid nozzles are uniformly distributed in a ring array on the front end side wall of the inner tube, the top end of the inner tube is a closed smooth curved surface, the front end of the outer tube embraces the inner tube in a closed structure to form a negative pressure suction port, the plane where the negative pressure suction port is located is located behind the plane where the flushing liquid nozzles are located.

[0008] As optional, a through hole is formed in the surface center of the sealing adapter, the through hole comprises a front large hole diameter and a rear small hole diameter, the inner wall of the front large hole diameter is provided with an internal thread, the outer wall of the outer tube is provided with an external thread, the outer tube is threadedly connected with the sealing adapter, the rear small hole diameter is for the inner tube to pass through and is in sealing fit with the outer wall of the inner tube, a lateral interface is formed in the side wall of the sealing adapter, and the lateral interface and the front large hole diameter are in communication with each other.

[0009] As optional, the cleaning liquid supply unit comprises a cleaning liquid storage bottle, a peristaltic pump and a cleaning control valve, the cleaning liquid storage bottle is connected to the inlet of the peristaltic pump through a first pipeline, the outlet of the peristaltic pump is connected to the inlet of the cleaning control valve through a second pipeline, and the outlet of the cleaning control valve is connected to the inner tube through a third pipeline.

[0010] As optional, the negative pressure generating unit comprises a vacuum pump, a negative pressure regulating valve and a waste liquid collection bottle, the top of the waste liquid collection bottle is provided with an air outlet and an air inlet, the vacuum pump is connected to the air outlet of the waste liquid collection bottle through a first pipeline, the air inlet of the waste liquid collection bottle is connected to the outlet of the negative pressure regulating valve through a second pipeline, and the inlet of the negative pressure regulating valve is connected to the lateral interface on the sealing adapter.

[0011] As optional, a cleaning control button is arranged on the surface of the handheld shell, the cleaning control button is electrically connected with the peristaltic pump, a negative pressure regulating handle is arranged on the negative pressure regulating valve, the negative pressure regulating handle is in transmission connection with the negative pressure regulating valve and controls the negative pressure intensity in the negative pressure channel.

[0012] As optional, the negative pressure adjusting valve is rotationally installed with a valve core, the shape and size of the valve core are matched with the inner wall of the negative pressure adjusting valve, the valve core is fixedly installed with a valve rod, the valve rod penetrates through the surface of the negative pressure adjusting valve, the outer surface of the negative pressure adjusting valve is fixedly installed with a mounting column, the valve rod penetrates through the mounting column, the outer side of the mounting column is fixedly installed with a ring-shaped convex tooth, one end of the valve rod is fixedly connected with a negative pressure adjusting handle, the negative pressure adjusting handle comprises an upper handle and a lower handle, the upper handle and the lower handle are rotationally connected, a spring is fixedly installed between the lower surface of the upper handle and the upper surface of the lower handle, the lower handle is provided with a clamping block at one end close to the ring-shaped convex tooth, and the clamping block and the ring-shaped convex tooth are clamped with each other.

[0013] As optional, the outer surface of the mounting column is fixedly installed with a negative pressure indicating disc, and the negative pressure indicating disc is marked with a negative pressure indicating scale.

[0014] As optional, the sealing adapter is integrally injection molded by medical polycarbonate, and a ring-shaped sealing groove is formed at the connection between the sealing adapter and the outer tube, and a silica gel sealing ring is embedded in the ring-shaped sealing groove.

[0015] The ear canal flushing negative pressure suction device of the technical scheme of the present application realizes physical isolation and independent flow guiding of the double fluid channels by adopting the fluid channel assembly comprising the mutually isolated flushing channel and negative pressure channel, and cooperating with the sealing adapter arranged at the tail of the handheld shell, the structure design makes the cleaning liquid supply unit and the suction force generated by the negative pressure generating unit form a cooperative working mode, when the device works, the cleaning liquid is uniformly sprayed in a ring shape from the cleaning liquid nozzle, realizing soft flushing of the ear canal wall, and the negative pressure suction port forms a directional flow field in the ear canal, so that the waste liquid is synchronously sucked and discharged with the flushing liquid, the synchronous flushing and suction mechanism effectively solves the liquid residue problem caused by the asynchronization of flushing and suction of the traditional device, avoids the risk of pollutants being flushed into the deep part of the ear canal, at the same time, the concentric double tube structure significantly reduces the size of the operation end, provides a better observation field of view for the operator, and makes the operation process more accurate and controllable, the design not only improves the diagnosis and treatment efficiency, but also reduces the possibility of cross infection by blocking the diffusion path of pollutants. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0017] Figure 1 The figure shows the connection relationship between the outer tube and the sealing adapter of the present application. Figure 2 Fig. 1 is a schematic diagram of the position relationship between the cleaning liquid nozzle and the negative pressure suction port of the present application; Figure 3 Fig. 2 is a cross-sectional view of the position relationship between the inner tube and the outer tube of the present application; Figure 4 Fig. 3 is a schematic diagram of the position relationship between the support ribs of the inner tube and the outer tube of the present application; Figure 5 Fig. 4 is a cross-sectional view of the stepped through hole on the sealing adapter of the present application; Figure 6 Fig. 5 is a schematic diagram of the cleaning liquid supply unit of the present application; Figure 7 Fig. 6 is a schematic diagram of the negative pressure generating unit of the present application; Figure 8 Fig. 7 is a schematic diagram of the negative pressure adjusting knob structure of the present application; Figure 9 Fig. 8 is a schematic diagram of the negative pressure adjusting valve structure of the present application.

[0018] Explanation of the reference numerals: 1, cleaning liquid nozzle; 2, negative pressure suction port; 3, flushing channel; 4, negative pressure channel; 5, sealing adapter; 6, inner tube; 7, outer tube; 8, support rib; 9, stepped through hole; 901, large hole diameter of the front section; 902, small hole diameter of the rear section; 10, inner thread; 11, outer thread; 12, lateral interface; 13, cleaning liquid storage bottle; 14, peristaltic pump; 15, cleaning control valve; 16, first pipeline; 17, second pipeline; 18, third pipeline; 19, vacuum pump; 20, negative pressure adjusting valve; 21, waste liquid collection bottle; 22, air suction port; 23, air inlet; 24, first pipe; 25, second pipe; 26, negative pressure adjusting knob; 2601, upper knob; 2602, lower pressing handle; 27, valve core; 28, valve stem; 29, mounting column; 30, annular convex tooth; 31, spring; 32, clamping block; 33, negative pressure indicator disc; 34, annular sealing groove; 35, silica gel sealing ring.

[0019] The realization of the objectives, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0021] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, motion condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0022] In addition, the description involving "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" throughout the text includes three schemes, for example, A and / or B includes A technical scheme, B technical scheme, and A and B simultaneously meet the technical scheme; in addition, the technical schemes of each embodiment can be combined with each other, and it must be based on the realization of the ordinary skilled in the art, when the combination of technical schemes appears contradictory or unachievable, it should be considered that the combination of technical schemes does not exist, nor within the protection scope required by the present application.

[0023] The present application provides an ear canal flushing negative pressure suction device.

[0024] In the embodiments of the present application, as shown in Figures 1-7 An ear canal flushing negative pressure suction device, comprising: A handheld shell, a cavity is provided in the handheld shell; A fluid channel assembly, the fluid channel assembly passes through the cavity in the handheld shell and extends out of the head and tail of the handheld shell at both ends, wherein a cleaning liquid nozzle 1 for flushing the ear canal and a negative pressure suction port 2 for absorbing the cleaning liquid are provided on the fluid channel assembly near the head of the handheld shell, the cleaning liquid nozzle 1 is communicated with a flushing channel 3, and the negative pressure suction port 2 is communicated with a negative pressure channel 4; A sealing adapter 5 is provided on the tail of the handheld shell, the sealing adapter 5 is used to connect the fluid channel assembly and isolate the flushing channel 3 and the negative pressure channel 4 on the fluid channel assembly, and is guided to the respective corresponding external interface; A cleaning liquid supply unit, the cleaning liquid supply unit is communicated with the flushing channel 3 on the fluid channel assembly to provide cleaning liquid; A negative pressure generating unit, the negative pressure generating unit is communicated with the negative pressure channel 4 on the fluid channel assembly to provide negative pressure power.

[0025] Specifically, by setting a fluid channel assembly containing mutually isolated flushing channel 3 and negative pressure channel 4, and using a sealing adapter 5 to achieve the sealed isolation and independent diversion of the double channels at the tail of the handheld shell; in normal operation, the cleaning liquid supply unit delivers cleaning liquid through the flushing channel 3 to the cleaning liquid nozzle 1 for continuous spraying, while the negative pressure generating unit forms a stable negative pressure suction force at the negative pressure suction port 2 through the negative pressure channel 4; when the cleaning liquid nozzle 1 sprays cleaning liquid to flush the ear canal, the negative pressure suction port 2 synchronously generates suction effect, so that the waste liquid and pollutants after flushing are immediately sucked into the negative pressure channel 4 and discharged, realizing the synchronous and collaborative operation of flushing and suction; the device effectively avoids cross contamination of cleaning liquid and waste liquid through the design of double channels physically isolated, and prevents liquid residue in the deep part of the ear canal through the synchronous flushing and suction mechanism, significantly improving the safety and effectiveness of ear canal flushing operation.

[0026] Optionally, the fluid channel assembly includes an inner tube 6 as the flushing channel 3 and an outer tube 7 as the negative pressure channel 4, and the inner tube 6 and the outer tube 7 are concentrically fixed by four radial support ribs 8 uniformly distributed along the axial direction. The support ribs 8 are integrally formed with the inner wall of the outer tube 7 and are in interference fit with the outer wall of the inner tube 6, so that the outer wall of the inner tube 6 and the inner wall of the outer tube 7 form four drainage channels with a crescent cross section.

[0027] Specifically, the radial support rib 8 is a rib-shaped structure equally distributed along the circumference, which is made of the same material as the outer sleeve and is integrally formed by injection molding, ensuring that the support rib 8 and the inner wall of the outer sleeve have continuous structural strength; the radial height of the support rib 8 is accurately calculated to provide stable radial support force when it is in interference fit with the outer wall of the inner tube 6, and it will not excessively extrude the inner tube 6 to cause flow channel deformation. The annular space is divided into four independent crescent-shaped drainage channels by the four support ribs 8, which ensures the concentricity of the double tubes and provides sufficient flow area for negative pressure suction; when the device is working, the flushing liquid is independently delivered to the operating end through the inner tube 6, while the waste liquid is stably returned under the action of negative pressure through the four drainage channels, which not only realizes the physical isolation of the flushing and suction channels, but also effectively prevents the eccentricity of the double tubes during use through the evenly distributed support structure, ensuring the stability of fluid power transmission.

[0028] In this embodiment, when the device performs ear canal flushing, the inner tube 6 bears the radial force generated by the pressure of the flushing liquid, at which time the four radial support ribs 8 effectively inhibit the radial deviation of the inner tube 6 through the uniformly distributed support points, maintaining the concentricity of the double tubes; at the same time, the four crescent-shaped drainage channels provide a stable and smooth path for waste liquid recovery, ensuring that the waste liquid can be quickly discharged through the annular gap under the action of negative pressure, avoiding the phenomenon of poor drainage or blockage caused by the eccentricity of the pipeline, thereby ensuring the synchronous stability of the flushing and suction process and improving the safety and effectiveness of ear canal flushing operation.

[0029] Optionally, the flush liquid nozzles are arranged in a ring array on the front end side wall of the inner tube 6, and the top end of the inner tube 6 is a closed smooth curve, and the front end of the outer tube 7 embraces the inner tube 6 in a tapered structure to form the negative pressure suction port 2, and the plane where the negative pressure suction port 2 is located is located behind the plane where the flush liquid nozzles are located.

[0030] Specifically, as shown in Figures 1-5 the flush liquid nozzles arranged in a ring array are composed of a plurality of micro-holes with a diameter of 0.3-0.5mm, the axis of each micro-hole is arranged outwardly diffusing at an angle of 30-45° with the axis of the inner tube 6, the top end of the inner tube 6 adopts a hemispherical closed structure, the tapered structure of the front end of the outer tube 7 is formed by stretching process, and the inner wall thereof maintains a uniform gap of 0.5-0.8mm with the outer wall of the inner tube 6 to form the ring-shaped negative pressure suction port 2, and the plane of the negative pressure suction port 2 is arranged behind the plane of the flush liquid nozzles to form a front-back staggered fluid channel layout.

[0031] In this embodiment, when the device is working, the cleaning liquid is sprayed out from the flush liquid nozzles arranged in a ring array in a conical diffusion, first acting on the front part of the ear canal for flushing, and then under the action of negative pressure, the waste liquid flows back along the ear canal wall to the negative pressure suction port 2 to be pumped out, and this front-spraying and back-suction flow field design forms a directional fluid circulation, which not only avoids the risk of directly spraying the eardrum, but also ensures that the used flush liquid can be recycled in time, and the tapered structure of the outer tube 7 not only ensures that the negative pressure suction port 2 maintains a proper distance from the ear canal wall to prevent tissue from being sucked in, but also realizes uniform suction through the ring-shaped suction port, and the smooth curve design of the top end of the inner tube 6 plays a guiding and protecting role when it is inserted into the ear canal, effectively reducing the potential damage risk to the ear canal mucosa, and significantly improving the safety and comfort of the operation.

[0032] Optionally, a through stepped hole 9 is formed in the center of the surface of the sealing adapter 5, wherein the stepped hole 9 includes a front large-diameter 901 and a rear small-diameter 902, the inner wall of the front large-diameter 901 is provided with an internal thread 10, the outer wall of the outer tube 7 is provided with an external thread 11, the outer tube 7 is threadedly connected with the sealing adapter 5, the rear small-diameter 902 is for the inner tube 6 to pass through and sealingly cooperate with the outer wall of the inner tube 6, and a lateral interface 12 is formed in the side wall of the sealing adapter 5 and communicates with the front large-diameter 901.

[0033] Specifically, as shown in Figures 1-5As shown, the front large aperture 901 of the stepped through hole 9 directly transitions to the rear small aperture 902 through an annular end face perpendicular to the axis, forming a clear stepped structure. The inner wall of the front large aperture 901 is machined with fine thread, which cooperates with the corresponding thread on the outer wall of the rear end of the outer tube 7. The rear small aperture 902 is embedded with a silica gel sealing ring 35, the inner diameter of which forms an interference fit with the outer diameter of the inner tube 6. The axis of the lateral interface 12 is arranged vertically at 90° to the axis of the stepped through hole, and the inner cavity thereof remains in communication with the annular drainage channel between the inner and outer tubes 7 through the front large aperture 901.

[0034] In this embodiment, when assembled, the inner tube 6 is first inserted through the rear small aperture 902 of the sealing adapter 5, and then the outer tube 7 is screwed into the front large aperture 901 using a threaded connection. At this time, the annular drainage channel formed between the inner wall of the outer tube 7 and the outer wall of the inner tube 6 remains open to the lateral interface 12. The threaded connection not only ensures the connection strength between the outer tube 7 and the adapter, but also achieves end face sealing through the tightening process. The interference fit between the inner tube 6 and the sealing ring effectively prevents the leakage of waste liquid. The negative pressure action range of the lateral interface 12 covers the entire cross-section of the annular drainage channel through the cavity of the front large aperture 901, achieving reliable sealing and efficient shunting of the double channels in a limited space. This not only ensures the isolation of the flushing liquid and the waste liquid, but also provides an optimal flow path for negative pressure transmission. At the same time, the threaded connection structure facilitates clinical disassembly and maintenance, significantly improving the service life and operational convenience of the device.

[0035] Optionally, the cleaning liquid supply unit includes a cleaning liquid storage bottle 13, a peristaltic pump 14, and a cleaning control valve 15. The cleaning liquid storage bottle 13 is connected to the inlet of the peristaltic pump 14 through a first pipeline 16. The outlet of the peristaltic pump 14 is connected to the inlet of the cleaning control valve 15 through a second pipeline 17. The outlet of the cleaning control valve 15 is connected to the inner tube 6 through a third pipeline 18.

[0036] Specifically, as shown in Figures 6-7 The cleaning liquid storage bottle 13 is made of medical-grade transparent polyethylene material. The bottle mouth is provided with a liquid outlet with a sealing cap. The peristaltic pump 14 is a multi-roller structure driven by a direct-current brushless motor. The pump tube is made of corrosion-resistant silica gel material. The cleaning control valve 15 is a normally closed electromagnetic valve. The valve body inlet and outlet adopt Luer connector standard. The first pipeline 16, the second pipeline 17, and the third pipeline 18 are all medical-grade PVC transparent flexible tubes. The end of the third pipeline 18 is connected to the flushing liquid interface at the tail of the inner tube 6 through a quick plug connector to achieve sealed connection.

[0037] In the embodiment, when the device flushing function is started, the peristaltic pump 14 operates to generate negative pressure, and the liquid in the cleaning liquid storage bottle 13 is sucked into the pump cavity through the first pipeline 16, and is delivered to the cleaning control valve 15 through the second pipeline 17. When the cleaning control valve 15 is opened, the cleaning liquid is stably delivered to the inner tube 6 through the third pipeline 18, and finally is sprayed in a ring shape from the flushing liquid nozzle. The linear flow characteristic of the peristaltic pump 14 ensures the smooth and controllable flow of the flushing liquid, avoiding pulse impact. The rapid response characteristic of the cleaning control valve 15 realizes the instant start and stop of the flushing operation. The transparent pipeline design facilitates the observation of the liquid flow state. The quick plug connector structure simplifies the assembly process. This hierarchical delivery system not only ensures the stability of the flushing liquid supply, but also realizes the precise control of the flow, effectively prevents the ear discomfort caused by pressure fluctuations, and significantly improves the safety and comfort of the flushing process.

[0038] Optionally, the negative pressure generating unit includes a vacuum pump 19, a negative pressure regulating valve 20, and a waste liquid collection bottle 21. The top of the waste liquid collection bottle 21 is provided with an air outlet 22 and an air inlet 23. The vacuum pump 19 is connected to the air outlet 22 of the waste liquid collection bottle 21 through a first pipeline 24. The air inlet 23 of the waste liquid collection bottle 21 is connected to the outlet of the negative pressure regulating valve 20 through a second pipeline 25. The inlet of the negative pressure regulating valve 20 is connected to the lateral interface 12 on the sealing adapter 5.

[0039] Specifically, as shown in Figures 6-7 The waste liquid collection bottle 21 is made of transparent polycarbonate material, and the bottle body is provided with volume graduation lines. The air outlet 22 and the air inlet 23 are both equipped with a one-way valve structure. The vacuum pump 19 is an oil-free rotary vane vacuum pump 19, and its air suction rate is not less than 20L / min. The negative pressure regulating valve 20 is a butterfly valve, and the valve body inlet and outlet are connected by a quick plug connector. The first pipeline 24 and the second pipeline 25 are both negative pressure resistant silicone hoses. The two ends of the second pipeline 25 are connected to the outlet of the negative pressure regulating valve 20 and the air inlet 23 of the waste liquid collection bottle 21 respectively through quick plug connectors to realize sealed connection. The inlet of the negative pressure regulating valve 20 is directly connected to the lateral interface 12 of the sealing adapter 5 through a quick plug connector.

[0040] In the embodiment, when the negative pressure suction function is started, the vacuum pump 19 continuously extracts air in the waste liquid collecting bottle 21 through the first pipeline 24, a stable negative pressure environment is formed in the bottle, the negative pressure is transmitted to the negative pressure regulating valve 20 through the second pipeline 25, and after being regulated, the negative pressure acts on the drainage channel in the outer tube 7 through the lateral interface 12 of the sealing adapter 5. During the operation, the waste liquid enters the negative pressure suction port 2 under the action of the negative pressure, enters the second pipeline 25 through the drainage channel and the lateral interface 12, and is finally collected in the waste liquid collecting bottle 21. The transparent design of the waste liquid collecting bottle 21 facilitates the observation of the liquid level change, the one-way valve structure can prevent the backflow of liquid, the vacuum pump 19 provides a stable negative pressure source, the negative pressure regulating valve 20 can realize accurate control of the negative pressure value, the quick connector ensures the sealing reliability of each connection, guarantees the efficient and stable negative pressure suction, facilitates the disassembly and cleaning of the waste liquid collecting bottle 21, effectively prevents cross contamination, and significantly improves the practicality and safety of the device.

[0041] Optionally, a cleaning control button is arranged on the surface of the handheld shell and is electrically connected with the peristaltic pump 14. A negative pressure adjusting handle 26 is arranged on the negative pressure regulating valve 20 and is in transmission connection with the negative pressure regulating valve 20 and controls the negative pressure intensity in the negative pressure channel 4.

[0042] Specifically, the cleaning control button is a waterproof self-resetting switch which is electrically connected with the motor controller of the peristaltic pump 14 through a signal line. The negative pressure adjusting handle 26 is in mechanical connection with the valve core 27 of the negative pressure regulating valve 20 through a stainless steel transmission shaft. A multi-joint protective sleeve is arranged on the transmission shaft. A working state indicator lamp is arranged beside the cleaning control button. A negative pressure level scale mark is engraved on the periphery of the negative pressure adjusting handle 26.

[0043] In the embodiment, when the ear canal flushing operation is performed, the operator presses the cleaning control button with the thumb, triggers the signal transmission to the peristaltic pump 14 controller, starts the pump operation, thereby realizing the adjustment of the flushing flow. At the same time, the negative pressure adjusting handle 26 is rotated, the torque is transmitted to the valve core 27 of the negative pressure regulating valve 20 through the transmission shaft, the valve opening is changed to control the vacuum degree of the negative pressure channel 4. The cleaning control button realizes the instant start and stop of the flushing function. The negative pressure adjusting handle 26 realizes the accurate control of the suction intensity, so that the operator can adjust the flushing and suction parameters in real time according to the intraoperative situation, effectively guaranteeing the safety and effectiveness of the diagnosis and treatment process.

[0044] Optionally, the negative pressure regulating valve 20 is rotatably installed with a valve core 27, the shape and size of the valve core 27 are matched with the inner wall of the negative pressure regulating valve 20, the valve core 27 is fixedly installed with a valve rod 28, the valve rod 28 penetrates through the surface of the negative pressure regulating valve 20, the outer surface of the negative pressure regulating valve 20 is fixedly installed with a mounting column 29, the valve rod 28 penetrates through the mounting column 29, the outer side of the mounting column 29 is fixedly installed with a ring-shaped convex tooth 30, one end of the valve rod 28 is fixedly connected with the negative pressure regulating handle 26, the negative pressure regulating handle 26 comprises an upper handle 2601 and a lower handle 2602, the upper handle 2601 and the lower handle 2602 are rotatably connected, the lower surface of the upper handle 2601 and the upper surface of the lower handle 2602 are fixedly installed with a spring 31, one end of the lower handle 2602 close to the ring-shaped convex tooth 30 is provided with a clamping block 32, and the clamping block 32 is clamped with the ring-shaped convex tooth 30.

[0045] Specifically, as shown in the figure, Figures 8-9 the valve core 27 is a circular structure, the surface of the valve core 27 is matched with the sealing surface of the valve body inner cavity, the valve rod 28 is made of stainless steel, the valve rod 28 is fixedly connected with the valve core 27, the mounting column 29 is embedded with a copper-based self-lubricating bearing, which is used to support the rotary motion of the valve rod 28, the teeth of the ring-shaped convex tooth 30 are V-shaped groove structures, which are uniformly distributed in the circumferential direction, the upper handle 2601 and the lower handle 2602 are rotatably connected through a pin shaft, the spring 31 is a stainless steel compression spring 31, both ends of the spring 31 are fixedly installed in the spring 31 seat of the upper and lower handles, and the bottom of the clamping block 32 is processed with a V-shaped tooth pattern matched with the ring-shaped convex tooth 30.

[0046] In the embodiment, when the negative pressure needs to be adjusted, the operator pinches the upper and lower handles to overcome the force of the spring 31 to make the clamping block 32 disengage from the ring-shaped convex tooth 30, at this time, rotating the negative pressure regulating handle 26 can drive the valve core 27 to rotate through the valve rod 28, change the valve opening degree, and release the handle after adjusting to the position, the spring 31 pushes the lower handle 2602 to make the clamping block 32 re-engage in the tooth groove of the ring-shaped convex tooth 30, so as to realize self-locking positioning, which ensures that the valve core 27 can be steplessly adjusted, and the set position can be kept through the tooth-shaped locking mechanism, preventing the valve opening degree from changing due to vibration and other factors, the circular valve core 27 structure ensures the linear characteristics of flow regulation, makes the negative pressure control more accurate and reliable, and effectively improves the operation stability and safety.

[0047] Optionally, the outer surface of the mounting column 29 is fixedly installed with a negative pressure indicating disc 33, and the negative pressure indicating disc 33 is marked with a negative pressure indicating scale.

[0048] In the embodiment, as shown in the figure, Figures 8-9As shown, the negative pressure indicating disc 33 is a ring-shaped metal sheet, the surface of which is processed with precise negative pressure scale values by etching process, the scale range covers-0.01MPa to-0.08MPa, the indicating disc is fixed on the end face of the mounting column 29 by laser welding, the central hole is concentrically assembled with the valve rod 28, the end of the upper handle 2601 is extended to form a transparent indicating sheet, the edge of which is engraved with indicating mark lines, the material is polycarbonate and is combined with the upper handle 2601 by inlaying process.

[0049] When the negative pressure adjusting rotary handle 26 is rotated, the valve rod 28 drives the upper handle 2601 to rotate synchronously, so that the mark lines on the indicating sheet move along the scale ring of the negative pressure indicating disc 33, since the opening of the valve core 27 and the negative pressure value are precisely calibrated, the scale on the indicating disc directly corresponds to the actual working negative pressure value, the operator can intuitively read the current set negative pressure parameter by observing the relative position of the indicating sheet and the scale disc, the visual design makes the negative pressure adjusting process more accurate and controllable, avoids the uncertainty of experience-based adjustment, the combination of the transparent indicating sheet and the metal scale disc not only ensures the reading clarity, but also guarantees the durability of the structure, so that the operator can quickly and accurately set the required negative pressure value and reliably maintain the working state, effectively ensuring the safety and stability of the ear canal irrigation and suction operation.

[0050] Optionally, the sealing adapter 5 is integrally injection molded by medical polycarbonate, and a ring-shaped sealing groove 34 is arranged at the connection between the sealing adapter 5 and the outer tube 7, and a silica gel sealing ring 35 is embedded in the ring-shaped sealing groove 34.

[0051] Specifically, as shown in the figure, Figures 1-5 When the outer tube 7 is screwed into the sealing adapter 5, the tube end plane first contacts the sealing ring lip, and as the screwing process proceeds, the sealing ring is axially compressed to produce radial deformation, achieving compression locking, the compressed sealing ring tightly adheres to the outer wall of the outer tube 7 and the inner wall of the sealing groove with constant pressure, forming a bidirectional sealing interface, this structure not only ensures that the irrigation fluid cannot leak from the thread gap, but also prevents external contaminants from entering the drainage channel, medical polycarbonate provides excellent dimensional stability and biocompatibility, and the elastic sealing ring compensates for the dimensional tolerance of the injection molded part, ensuring stable sealing performance under different temperature conditions, providing reliable sealing protection for the device.

[0052] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. An ear canal lavage negative pressure suction device, characterized by, The utility model relates to a kind of medical fluid supply device, including: Handheld shell is provided with fluid passage assembly inside; The fluid passage assembly includes at least one flushing channel (3) and one suction channel (4), the flushing channel (3) and suction channel (4) converge and are physically isolated in the operating end of the handheld shell, the outlet of the flushing channel (3) and the inlet of the suction channel (4) are arranged axially staggered, to form a front-to-back directional fluid path when operating; The connecting end of the handheld shell is provided with a sealed adapter (5) for connecting the isolated flushing channel (3) and suction channel (4) to an external flushing fluid source and an external negative pressure source respectively, so that the device can realize the simultaneous flushing of fluid delivery and waste liquid negative pressure suction.

2. The negative pressure suction device for ear canal irrigation according to claim 1, wherein The fluid passage assembly includes an inner tube (6) as a flushing channel (3) and an outer tube (7) as a negative pressure channel (4), the inner tube (6) and the outer tube (7) are concentrically fixed by four radial support ribs (8) uniformly distributed along the axial direction, the support ribs (8) are integrally formed with the inner wall of the outer tube (7) and are in interference fit with the outer wall of the inner tube (6), so that four drainage channels with a crescent cross-section are formed between the outer wall of the inner tube (6) and the inner wall of the outer tube (7).

3. The negative pressure suction device for ear canal irrigation according to claim 2, wherein The flushing liquid nozzle is uniformly distributed in a ring array on the front end side wall of the inner tube (6), the top end of the inner tube (6) is a closed smooth surface, the front end of the outer tube (7) embraces the inner tube (6) in a closed structure to form a negative pressure suction port (2), and the plane where the negative pressure suction port (2) is located is behind the plane where the flushing liquid nozzle is located.

4. The negative pressure suction device for ear canal irrigation according to claim 2, wherein The surface center of the sealed adapter (5) is provided with a through front-to-back stepped through hole (9), wherein the stepped through hole (9) includes a front large aperture (901) and a rear small aperture (902), the inner wall of the front large aperture (901) is provided with an internal thread (10), the outer wall of the outer tube (7) is provided with an external thread (11), the outer tube (7) is threadedly connected with the sealed adapter (5), the rear small aperture (902) is penetrated by the inner tube (6) and is in sealing fit with the outer wall of the inner tube (6), and a lateral interface (12) is formed in the side wall of the sealed adapter (5) and communicates with the front large aperture (901).

5. The negative pressure suction device for ear canal irrigation according to claim 4, wherein The cleaning liquid supply unit includes a cleaning liquid storage bottle (13), a peristaltic pump (14) and a cleaning control valve (15), the cleaning liquid storage bottle (13) is connected with the inlet of the peristaltic pump (14) through a first pipeline (16), the outlet of the peristaltic pump (14) is connected with the inlet of the cleaning control valve (15) through a second pipeline (17), and the outlet of the flushing control valve is connected with the inner tube (6) through a third pipeline (18).

6. The negative pressure suction device for ear canal irrigation according to claim 5, wherein The negative pressure generating unit comprises a vacuum pump (19), a negative pressure regulating valve (20) and a waste liquid collecting bottle (21), the top of the waste liquid collecting bottle (21) is provided with an air outlet (22) and an air inlet (23), the vacuum pump (19) is connected to the air outlet (22) of the waste liquid collecting bottle (21) through a first pipeline (24), the air inlet (23) of the waste liquid collecting bottle (21) is connected to the outlet of the negative pressure regulating valve (20) through a second pipeline (25), and the inlet of the negative pressure regulating valve (20) is connected to the lateral interface (12) on the sealing adapter (5).

7. The negative pressure suction device for ear canal irrigation according to claim 6, characterized in that A cleaning control button is arranged on the surface of the handheld shell and is electrically connected with the peristaltic pump (14), and the negative pressure regulating valve (20) is provided with a negative pressure regulating handle (26) in transmission connection with the negative pressure regulating valve (20) and for controlling the negative pressure intensity in the negative pressure channel (4).

8. The negative pressure suction device for ear canal irrigation according to claim 7, characterized in that The negative pressure regulating valve (20) is rotatably provided with a valve core (27) which is matched with the inner wall of the negative pressure regulating valve (20) in shape and size, the valve core (27) is fixedly provided with a valve rod (28) which penetrates through the surface of the negative pressure regulating valve (20), the outer surface of the negative pressure regulating valve (20) is fixedly provided with a mounting column (29) which is penetrated by the valve rod (28), the outer side of the mounting column (29) is fixedly provided with an annular convex tooth (30), one end of the valve rod (28) is fixedly connected with the negative pressure regulating handle (26), the negative pressure regulating handle (26) comprises an upper handle (2601) and a lower handle (2602), the upper handle (2601) and the lower handle (2602) are rotatably connected, the lower surface of the upper handle (2601) and the upper surface of the lower handle (2602) are fixedly provided with a spring (31), the end of the lower handle (2602) close to the annular convex tooth (30) is provided with a clamping block (32), and the clamping block (32) is clamped with the annular convex tooth (30).

9. The negative pressure suction device for ear canal irrigation according to claim 8, characterized in that The outer surface of the mounting column (29) is fixedly provided with a negative pressure indicating disc (33), and the negative pressure indicating disc (33) is marked with a negative pressure indicating scale.

10. The negative pressure suction device for ear canal irrigation according to claim 2, wherein The sealing adapter (5) is integrally injection molded by medical polycarbonate, and the connection part of the sealing adapter (5) and the outer tube (7) is provided with an annular sealing groove (34), and the annular sealing groove (34) is embedded with a silica gel sealing ring (35).

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