Eye irrigator

Abstract

The utility model relates to medical instrument technical field, a kind of eye flushing device, including tubular tube, surface is equipped with the scale line of indicating capacity, and the side wall is equipped with liquid inlet interface in two ends and is equipped with external thread interface;Liquid outlet assembly contains first cap sleeve, first valve plug and first spring;The first cap sleeve is connected with the one end of tube body by thread, and the inside is equipped with the valve cavity and flow channel being communicated;The first valve plug contains stem portion and hemispherical portion, stem portion is inserted into the cavity of tube body, and hemispherical portion is located in valve cavity;The first spring is abutted hemispherical portion, so that valve plug closes flow channel when pumping, and when discharging, washing liquid pressure promotes valve plug to compress spring to open flow channel;Liquid inlet assembly contains second cap sleeve, second valve plug and second spring;The second cap sleeve is vertically connected with the side wall interface of tube body, and the inside is equipped with the valve cavity and flow channel being communicated;The second valve plug structure is same with first valve plug, and its stem portion is inserted into flow channel, and hemispherical portion is located in valve cavity;The second spring is abutted hemispherical portion.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a mechanical eye irrigator with anti-backflow control, precise flow adjustment and automatic reset functions. Background Technology

[0002] Eye irrigators are crucial devices for treating emergency eye contamination such as chemical burns and foreign body intrusion. Existing technologies have the following main drawbacks: 1. Inadequate backflow prevention structure: Traditional flushers mostly use a single one-way valve, which can only prevent backflow at the outlet end; when the liquid extraction component is pulled back, the inlet end lacks an effective sealing mechanism, which can easily lead to backflow of washing liquid into the storage bottle and increase the risk of cross-infection.

[0003] 2. Insufficient flow rate adjustment accuracy: Some irrigators use knobs to directly adjust the flow channel cross-sectional area. The adjustment scale has a non-linear relationship with the actual flow rate. The sensitivity is poor in the low flow rate range (rotating the knob 10° only changes the flow rate by 0.1mL / s), which cannot meet the clinical needs of continuous micro-irrigation (such as 0.5mL / time) for chemical burns.

[0004] 3. Poor operational continuity: Mechanical flushers rely on manually pulling the core rod to reset. During continuous flushing, it is necessary to repeatedly release and pull back the rod, which not only increases operator fatigue but also leads to unstable flushing intervals (measured interval > 2 seconds), affecting the efficiency of contaminant flushing. Utility Model Content

[0005] To overcome the problems of poor backflow prevention, insufficient flow regulation accuracy, and low operational consistency in existing irrigators, this utility model provides an eye irrigator that achieves unidirectional flow of washing liquid and prevents contamination through a two-way valve plug-spring coordinated sealing (liquid outlet component draws liquid and closes / liquid outlet, liquid inlet component draws liquid and opens / liquid outlet); achieves precise flow regulation by linearly limiting the stroke of the core rod through a screw sleeve and linking it to the tube scale; and achieves continuous cyclic irrigation operation by automatically resetting the core rod through a third spring.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: an eye rinser, comprising a tubular tube body with scale lines indicating capacity on the surface, external threaded interfaces at both ends and a liquid inlet on the side wall; a liquid outlet assembly, comprising a first cap, a first valve plug, and a first spring; the first cap is threadedly connected to one end of the tube body and has a communicating valve cavity and flow channel inside; the first valve plug comprises a rod-shaped part and a hemispherical part, the rod-shaped part extending into the inner cavity of the tube body, and the hemispherical part located in the valve cavity; the first spring abuts against the hemispherical part, so that the valve plug closes the flow channel when liquid is drawn, and the washing liquid pressure pushes the valve plug to compress the spring and open the flow channel when liquid is discharged; a liquid inlet assembly, comprising a second cap, a second valve plug, and a second spring; the second cap is vertical The pipe body has a side wall interface with a valve chamber and flow channel inside. The second valve plug has the same structure as the first valve plug, with its rod-shaped part extending into the flow channel and its hemispherical part located in the valve chamber. The second spring abuts against the hemispherical part, so that the negative pressure in the pipe opens the flow channel when the liquid is drawn, and the positive pressure in the pipe pushes the valve plug to close the flow channel when the liquid is discharged. The liquid drawing assembly includes a pipe cap, a core rod, a screw sleeve, a rod seat, and a third spring. The pipe cap is threaded to the other end of the pipe body. The core rod has a piston at its front end and a sealing ring on its surface that slides to seal against the inner wall of the pipe body. The screw sleeve is threaded to the inner wall of the pipe cap and limits the stroke of the core rod by the depth of screwing in. The rod seat is connected to the end of the core rod. The third spring is sleeved on the outside of the core rod, with its two ends abutting against the screw sleeve and the rod seat respectively, so as to realize the automatic reset of the core rod.

[0007] In the aforementioned eye irrigator, the valve chamber diameter of the liquid dispensing component is larger than the flow channel, forming a stepped structure, and the first spring is located inside the valve chamber.

[0008] In the aforementioned eye irrigation device, a radial sealing ring is provided between the second cap of the liquid inlet assembly and the interface on the side wall of the tube body.

[0009] In the aforementioned eye irrigation device, the threaded sleeve of the liquid aspiration assembly is clearance-fitted with the core rod, and the screw depth ranges from 0 to 10 mm.

[0010] In the aforementioned eye rinser, the graduation lines are arranged along the axial direction of the tube, and the unit is mL.

[0011] The aforementioned eye rinser also includes a detachable nozzle with a microporous structure of different apertures.

[0012] The aforementioned eye rinser has a non-slip texture on the surface of the rod seat.

[0013] In the aforementioned eye rinser, the core rod sealing ring consists of two sets of O-rings.

[0014] In the aforementioned eye irrigator, the outer end of the inlet assembly is connected to the tubing of the washing solution bottle.

[0015] In the aforementioned eye rinser, the depth of the screw thread insertion corresponds to the flow rate of the tube's scale markings.

[0016] The beneficial effects of this utility model are: 1. Enhanced safety with bidirectional backflow prevention: The valve plug-spring collaborative mechanism of the liquid outlet and liquid inlet components ensures unidirectional flow of the washing liquid, completely preventing backflow of the washing liquid into the storage bottle and reducing the risk of cross-infection.

[0017] 2. Linear and precise flow regulation: The screw insertion depth is linked to the tube body scale, forming a linear correspondence between stroke and flow rate, achieving stepless and precise control from trace volume to regular flushing volume.

[0018] 3. Continuous and efficient operation: The third spring automatically resets the core rod, eliminating the need for manual pull-back operation, and realizing continuous cyclic flushing by pressing and releasing, which improves flushing efficiency and reduces operator fatigue. Attached Figure Description

[0019] The present invention will be further described below with reference to the embodiments and examples.

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an embodiment.

[0021] Figure 2 This is a schematic diagram of the overall cross-sectional structure of an embodiment.

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the liquid outlet component.

[0023] Figure 4 This is a cross-sectional schematic diagram of the liquid inlet assembly.

[0024] Figure 5 This is a cross-sectional schematic diagram of the liquid extraction assembly.

[0025] In the diagram: 1. Tube body; 2. Discharge assembly; 21. First cap; 22. First spring; 23. First valve plug; 24. Circular rubber ring; 25. First valve chamber; 26. First flow channel; 3. Inlet assembly; 31. Second cap; 32. Second valve plug; 33. Second spring; 34. Second valve chamber; 35. Second flow channel; 4. Pumping assembly; 41. Tube cap; 42. Screw sleeve; 43. Core rod; 44. Rod seat; 45. Third spring; 46. Sealing rubber ring. Detailed Implementation

[0026] This embodiment provides an eye rinser with anti-backflow and flow rate adjustment functions, such as... Figure 1-5As shown, its core structure includes a straight hollow tube body 1, a liquid outlet component 2, a liquid inlet component 3, and a liquid extraction component 4. The tube body 1 is made of transparent medical-grade polycarbonate (PC) material, and the surface is marked with graduation lines (unit: mL) along the axial direction to indicate the internal washing liquid volume and adjust the flushing volume. The tube body 1 is provided with external threaded interfaces at both ends: one end is connected to the liquid outlet component 2, and the other end is connected to the liquid extraction component 4; the side wall near the end of the liquid outlet component 2 is provided with a vertical interface of the liquid inlet component 3.

[0027] The liquid outlet assembly 2 consists of a first cap 21, a first spring 22, a first valve plug 23, and a circular rubber ring 24. The first cap 21 is a straight tubular structure with internal threads on its inner wall, which screws into the external threads at the end of the tube body 1. During connection, the end face of the tube body 1 presses against the circular rubber ring 24 to form an axial seal. Inside the first cap 21, a first valve chamber 25 and a first flow channel 26 are arranged sequentially along the axial direction. The diameter of the first valve chamber 25 is larger than that of the first flow channel 26, forming a stepped structure. The first valve plug 23 consists of a rod-shaped part (straight...) The tube body 1 (2mm in diameter, 5mm in length) and the hemispherical part (4mm in diameter) are integrally formed. During assembly, the rod-shaped part is inserted into the inner cavity of the tube body 1, the hemispherical part is located in the first valve cavity 25, the first spring 22 is located in the first valve cavity 25 and abuts against the hemispherical part, and the end of the first cap 21 can be fastened to a detachable nozzle. The nozzle is equipped with a microporous structure with different apertures (mist: φ0.2mm; shower head: φ0.5mm; water column: φ1.0mm). The form of the washing liquid can be switched by rotating the nozzle.

[0028] Working principle: During the liquid extraction stage, when the liquid extraction component 4 is pulled backward, a negative pressure is formed inside the tube 1. The hemispherical part of the first valve plug 23 presses tightly against the end face of the tube 1 under the action of the first spring 22 (stiffness coefficient 0.5N / mm), sealing the first flow channel 26 and preventing air or washing liquid from flowing back. During the liquid discharge stage, when the liquid extraction component 4 is pushed forward, the pressure inside the tube increases, and the washing liquid pushes the hemispherical part to compress the first spring 22 (compression amount ≤3mm). The rod-shaped part slides along the axial direction to ensure linear movement, the first flow channel 26 opens, and the washing liquid is sprayed out through the first flow channel 26.

[0029] The liquid inlet assembly 3 consists of a second cap 31, a second valve plug 32, a second spring 33, and a butterfly rubber ring. The structure of the second cap 31 is the same as that of the first cap 21. The side wall is provided with internal threads and is vertically screwed into the side interface of the tube body 1. When connected, the butterfly rubber ring is deformed by pressure to ensure radial sealing. The second cap 31 has a second valve cavity 34 and a second flow channel 35 arranged axially inside. The outer end of the second flow channel 35 is connected to the washing bottle conduit (inner diameter 3mm). The structure of the second valve plug 32 is the same as that of the first valve plug 23. The rod-shaped part is inserted into the second flow channel 35, and the hemispherical part is located in the second valve cavity 34. The second spring 33 (stiffness coefficient 0.3N / mm) is also located in the second valve cavity 34 and abuts against the hemispherical part.

[0030] Working principle: During the liquid extraction stage, the negative pressure inside the tube causes the hemispherical part of the second valve plug 32 to overcome the elastic force of the second spring 33 (compression amount ≤ 2mm), and the second flow channel 35 opens, allowing the washing liquid to flow from the washing liquid bottle into the tube body 1; During the liquid discharge stage, the positive pressure inside the tube pushes the hemispherical part to press tightly against the inlet of the second flow channel 35, and the second spring 33 resets, closing the second flow channel 35 to prevent the washing liquid from flowing back.

[0031] The liquid extraction assembly 4 consists of a cap 41, a threaded sleeve 42, a core rod 43, a rod seat 44, and a third spring 45. The cap 41 has an internal thread that engages with the external thread at the end of the tube body 1 to form a sealed cavity. The core rod 43 has a diameter of 8 mm and two sets of O-rings 46 (material: silicone, hardness 60 Shore A) on its surface to ensure sliding seal with the inner wall of the tube body 1. A disc-shaped piston is provided at the front end of the core rod 43 to increase the liquid extraction area. The outer wall of the threaded sleeve 42 has an external thread that engages with the internal thread of the cap 41. The inner diameter of the threaded sleeve 42 is clearance-fitted with the core rod 43 (0.1 mm clearance on one side) to restrict the axial movement of the core rod 43. The rod seat 44 is snapped onto the end of the core rod 43 and has anti-slip texture on its surface. The third spring 45 is sleeved on the outside of the core rod 43, with one end abutting against the threaded sleeve 42 and the other end abutting against the rod seat 44 (stiffness coefficient 1 N / mm).

[0032] Working principle: Rotating the screw sleeve 42 changes its screw-in depth (range: 0-10mm), thereby limiting the maximum push stroke of the core rod 43. For example, when the screw-in depth is 5mm, the single flush volume corresponds to 2mL on the tube body 1 scale. During the liquid discharge stage, pressing the rod seat 44 pushes the core rod 43, compressing the third spring 45, and the washing liquid is sprayed out through the liquid discharge assembly 2. During the reset stage, releasing the rod seat 44 causes the third spring 45 to drive the core rod 43 to automatically return to its original position, reducing manual pulling resistance. If continuous flushing is required, the core rod 43 can be gently pushed to complete the reset. If use is stopped, disconnecting the washing liquid bottle connection will reset the third spring 45 to its initial state.

[0033] Overall working principle of the rinsing device: During assembly, connect the inlet component 3 to the washing solution bottle, install the nozzle on the outlet component 2, and adjust the suction component 4 to the required rinsing volume (e.g., 3mL); During suction: pull the rod seat 44 backward to create negative pressure in the tube, open the inlet component 3, and allow the washing solution to flow into the tube 1; the outlet component 2 is closed to prevent backflow; During discharge: press the rod seat 44 forward to increase the pressure in the tube, close the inlet component 3, open the outlet component 2, and spray the washing solution to rinse the eyes; During reset: release the rod seat 44, and the third spring 45 drives the core rod 43 back to its original position, ready for the next operation.

[0034] The eye irrigator in this embodiment uses a modular design to achieve backflow prevention, flow rate adjustment, and automatic reset functions. Its usage is divided into a preparation stage, an irrigation stage, and a termination stage. The specific operation steps are as follows: Step 1: Component assembly and inspection. Vertically screw the second cap 31 of the liquid inlet assembly 3 into the threaded interface on the side of the tube body 1, ensuring that the butterfly rubber ring is not deformed under pressure. Insert the washing bottle tubing (standard Luer interface) into the second flow channel 35 of the second cap 31 and check whether the connection is sealed (you can observe whether there is leakage on the side wall of the tube body 1 by slightly squeezing the washing bottle). Select the nozzle type according to the rinsing requirements (such as a mist nozzle for large-area rinsing and a water jet nozzle for precise removal of foreign objects), and fasten the nozzle to the end of the first cap 21 and rotate it to the locked position. Rotate the screw sleeve 42 into the tube cap 41, observe the scale line on the surface of the tube body 1, and set the single rinsing volume (e.g., a screw depth of 5mm corresponds to 2mL). Pull the core rod 43 to the maximum stroke and check whether the third spring 45 returns to its original position flexibly, ensuring that the rod seat 44 is not stuck. Step 2: Filling the washing solution. Place the rinsing device horizontally with the inlet component 3 facing down. Slowly pull the lever 44 backward to the set end point of the stroke. A negative pressure will be formed in the tube, and the washing solution will flow from the washing solution bottle into the tube body 1 through the second flow channel 35. Observe the scale on the tube body 1. Stop pulling when the washing solution volume reaches the required value (e.g., 2mL × 3 times = 6mL for a single rinse). During the operation, avoid rapid pulling, which may cause air bubbles to enter the tube and affect the rinsing effect. If the liquid level in the washing solution bottle is too low, a new bottle needs to be replaced and refilled. Step 3: Adjust the patient's position. Instruct the patient to sit or lie supine with their head slightly tilted back and their eyes naturally open or closed (depending on the degree of contamination: for mild foreign bodies, the eyes can be opened for rinsing; for chemical burns, the eyes must be closed for rinsing to prevent liquid from seeping into the cornea). Step 4: Positioning the irrigator. The operator holds the middle of tube 1 and aims the nozzle of the dispensing component 2 at the affected eye (3-5cm away from the eyeball). If using a mist nozzle, keep the nozzle perpendicular to the eyeball. If using a water jet nozzle, tilt it at 15° to avoid direct impact on the cornea. Step 5: Perform the rinsing operation. For a single rinse: quickly press the lever 44 forward to the end of its stroke, compressing the third spring 45, and the rinsing solution will be sprayed out through the first flow channel 26; observe whether the rinsing solution evenly covers the affected eye (the mist should diffuse in a conical shape, and the water column should spray in a straight line); release the lever 44, and the third spring 45 will drive the core rod 43 to automatically reset, while the second valve plug 32 of the inlet assembly 3 will close the second flow channel 35 to prevent backflow; for continuous rinsing: repeat the pressing and releasing action of the lever 44, with an interval of 1-2 seconds each time, to ensure that the rinsing solution fully replaces the contaminants; monitor the remaining rinsing solution volume through the scale on the tube body 1, and refill if insufficient; for chemical burns, rinsing should be continued for 15-30 minutes, during which the rinsing solution bottle can be replaced or the rinsing solution replenished; for children or sensitive patients, the screw depth of the small screw sleeve 42 can be adjusted (e.g., 1mm corresponds to 0.5mL) to reduce the single discharge volume and reduce irritation. Step 6: Equipment cleaning. After rinsing, disconnect the washing solution bottle tubing, turn the inlet assembly 3 upwards, and press the rod seat 44 to discharge the residual washing solution in the tube; unscrew the first cap 21 and the nozzle, and rinse the inside of the first flow channel 26 with clean water to prevent the medicine solution from crystallizing and clogging; disassemble the screw sleeve 42 and the core rod 43, wipe the sealing ring 46 with medical alcohol, and reassemble after drying. Step 7: Waste disposal. If the washing solution is for single use (such as saline), discard the bottle directly. If it is refillable, it must be disinfected and recycled in accordance with medical waste regulations. Step 8: Handling Abnormal Situations, Poor Liquid Discharge: Check if the first valve plug 23 is stuck (e.g., the rod-shaped part is bent), adjust it slightly with tweezers and reassemble it; Backflow Contamination: If the liquid in the washing bottle is found to be turbid, immediately replace the second valve plug 32 and the second spring 33, and autoclave the tube body 1; Flow Deviation: Calibrate the correspondence between the screw insertion depth of the sleeve 42 and the scale line (e.g., if the actual liquid discharge is 10% less than the set value, the sleeve 42 needs to be screwed in an additional 0.5mm to compensate).

[0035] This embodiment achieves unidirectional flow control of the washing solution through the synergistic action of a mechanical anti-backflow valve and a spring reset mechanism. Combined with the flow regulation function, it can adapt to the eye irrigation needs of different levels of contamination while avoiding cross-contamination. It has the advantages of simple operation and safety and reliability. The usage method is designed through a standardized process to ensure that medical staff or patients' families can quickly master it, while reducing the risk of equipment failure or secondary contamination caused by improper operation.

Claims

1. An eye rinser, characterized in that: include The tubular body has scale lines indicating the capacity on its surface, external threaded interfaces at both ends, and liquid inlet interfaces on the side walls. The liquid discharge assembly includes a first cap, a first valve plug, and a first spring. The first cap is threaded to one end of a tube and has a communicating valve cavity and flow channel inside. The first valve plug includes a rod-shaped part and a hemispherical part, with the rod-shaped part extending into the inner cavity of the tube and the hemispherical part located inside the valve cavity. The first spring abuts against the hemispherical part, so that the valve plug closes the flow channel when liquid is drawn and the washing liquid pressure pushes the valve plug to compress the spring and open the flow channel when liquid is discharged. The liquid inlet assembly includes a second cap, a second valve plug, and a second spring. The second cap is vertically connected to the side wall interface of the tube body and has a communicating valve cavity and flow channel inside. The second valve plug has the same structure as the first valve plug, with its rod-shaped part extending into the flow channel and its hemispherical part located in the valve cavity. The second spring abuts against the hemispherical part, so that the negative pressure in the tube opens the flow channel when liquid is drawn and the positive pressure in the tube pushes the valve plug to close the flow channel when liquid is discharged. The liquid extraction assembly includes a cap, a core rod, a threaded sleeve, a rod seat, and a third spring. The cap is threadedly connected to the other end of the tube body. The core rod has a piston at its front end and a sealing ring on its surface that slides to seal against the inner wall of the tube body. The threaded sleeve is threadedly connected to the inner wall of the cap and limits the core rod's stroke by the depth of screwing in. The rod seat is connected to the end of the core rod. The third spring is sleeved on the outside of the core rod, with its two ends abutting against the threaded sleeve and the rod seat respectively, to achieve automatic reset of the core rod.

2. The eye rinser according to claim 1, characterized in that: The valve chamber diameter of the liquid outlet assembly is larger than the flow channel, forming a stepped structure, and the first spring is located inside the valve chamber.

3. The eye rinser according to claim 1 or 2, characterized in that: A radial sealing ring is provided between the second cap of the liquid inlet assembly and the interface on the side wall of the tube.

4. The eye rinser according to claim 1, characterized in that: The threaded sleeve of the liquid extraction assembly is clearance-fitted with the core rod, and the screw depth ranges from 0 to 10 mm.

5. The eye rinser according to claim 1, characterized in that: The graduation lines are set along the axial direction of the tube body, and the unit is mL.

6. The eye rinser according to claim 1, characterized in that: The liquid dispensing assembly also includes a detachable nozzle, which has a microporous structure with different apertures.

7. The eye rinser according to claim 1, characterized in that: The surface of the rod seat is provided with anti-slip texture.

8. The eye rinser according to claim 1, characterized in that: The core rod sealing ring consists of two sets of O-rings.

9. The eye rinser according to claim 1, characterized in that: The outer end of the flow channel of the liquid inlet assembly is connected to the tubing of the washing liquid bottle.

10. The eye rinser according to claim 4, characterized in that: The screw insertion depth corresponds to the flow rate of the tube body scale.

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