Double-tube nasal aspirator

Abstract

The utility model relates to the field of nasal aspirators, in particular to a double-barrel nasal aspirator which comprises an aspiration assembly, a connecting pipe and an air exhaust mechanism. The two ends of the connecting pipe communicate with the suction assembly and the air exhaust mechanism correspondingly. The air exhaust mechanism comprises an outer cylinder, a piston and an umbrella-shaped valve, an inner cylinder is arranged in the outer cylinder, an air exhaust receding hole is formed in the top of the outer cylinder, and the air exhaust receding hole is communicated with the inner cylinder; the piston is arranged in the inner cylinder, an inclined sealing part is arranged on the outer side of the piston, the inclined sealing part inclines outwards from the bottom end to the top end, and the top end of the inclined sealing part is in abutting contact with the inner side wall of the inner cylinder; the umbrella-shaped valve is arranged at the bottom of the inner barrel, the inner barrel is surrounded by the outer barrel, the inner barrel is protected, the hand holding force is prevented from being transmitted to the inner barrel, and then the situation that the inner barrel deforms due to stress, and the air exhaust efficiency of the piston is affected is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a nose suction device field, concretely relates to a double cylinder nose suction device. BACKGROUND

[0002] The nose suction device is a tool for cleaning the nasal cavity, especially for infants and people with more nasal secretions and difficult to discharge themselves. It can suck out the secretions, mucus, dust and other dirt in the nasal cavity through certain pressure or negative pressure, so as to keep the nasal cavity clean and unobstructed. The nose suction device includes a manual nose suction device and an electric nose suction device. The manual nose suction device is relatively simple and low in cost, but the user needs to control the force and frequency by himself. The electric nose suction device is more intelligent and can control the suction force and flushing frequency more accurately, and is more convenient to use.

[0003] When using the manual nose suction device, the user usually needs to pinch the ball part of the nose suction device first, then gently put the tip of the nose suction device into the nasal cavity, and then slowly release the ball part to suck out the dirt in the nasal cavity by negative pressure. This process needs to be operated gently to avoid damage to the nasal cavity. However, the existing manual nose suction device usually adopts a single cylinder structure, which can easily cause the deformation of the cylinder structure when holding, affecting the air pumping efficiency of the piston. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a double cylinder nose suction device to improve the problem that the existing manual nose suction device usually adopts a single cylinder structure, which can easily cause the deformation of the cylinder structure when holding, affecting the air pumping efficiency of the piston.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A double cylinder nose suction device, comprising a suction assembly, a connecting pipe and an air pumping mechanism;

[0007] The two ends of the connecting pipe are respectively connected with the suction assembly and the air pumping mechanism in communication;

[0008] The air pumping mechanism comprises an outer cylinder, a piston and an umbrella valve, the inner cylinder is arranged in the outer cylinder, the top of the outer cylinder is provided with an exhaust clearance hole, and the exhaust clearance hole is in communication with the inner cylinder; the piston is arranged in the inner cylinder, the outer side of the piston is provided with an inclined sealing part, the inclined sealing part is inclined from the bottom end to the top end, and the top end of the inclined sealing part is in abutting contact with the inner side wall of the inner cylinder;

[0009] The umbrella valve is arranged at the bottom of the inner cylinder.

[0010] Further, the piston comprises a piston head, a connecting rod and a piston sealing ring, the piston sealing ring is sleeved on the side of the piston head, the bottom end of the connecting rod is connected with the piston head, and the top end of the connecting rod extends outward through the exhaust clearance hole.

[0011] Further, the piston head comprises an upper pressing plate and a lower pressing plate, the piston sealing ring comprises an embedded part and the inclined sealing part,

[0012] The bottom end of the connecting rod is connected through the upper pressing plate and the lower pressing plate; the end part of the upper pressing plate and the lower pressing plate is provided with an embedded space, the embedded part is arranged in the embedded space, the top surface and the bottom surface of the embedded part are respectively matched with the bottom surface of the upper pressing plate and the top surface of the lower pressing plate; the inner side of the bottom of the inclined sealing part is connected with the outer side of the embedded part, the inner side of the top of the inclined sealing part is spaced from the end part of the upper pressing plate, and the outer side of the bottom of the inclined sealing part is spaced from the inner side wall of the inner cylinder.

[0013] Further, the piston further comprises an elastic reset member, the elastic reset member is arranged around the periphery of the connecting rod, and the two ends of the elastic reset member are respectively matched with the top surface of the upper pressing plate and the inner top surface of the outer cylinder.

[0014] Further, the umbrella-shaped valve comprises a valve body and a flexible mounting column, and the valve body is fixed at the bottom of the inner cylinder;

[0015] The bottom end of the flexible mounting column extends downward through the valve body, the lower part of the flexible mounting column is provided with a limiting protrusion, and the limiting protrusion is matched with the bottom surface of the valve body;

[0016] At least one air inlet channel is formed in the valve body, the top end of the flexible mounting column is provided with a flexible valve piece extending horizontally and outwardly, and the flexible valve piece covers the upper opening of the air inlet channel.

[0017] Further, a protruding part protruding downward is arranged in the middle part of the valve body, the air inlet channel is formed in the protruding part, and the free end of the flexible valve piece extends horizontally and outwardly to the top surface edge of the protruding part.

[0018] Further, an air inlet pipe is arranged on the outer side of the outer cylinder, the air inlet pipe is communicated with the outer cylinder, and one end of the connecting pipe is inserted into the air inlet pipe.

[0019] Further, the suction assembly comprises an upper shell and a lower shell connected with each other; the upper shell is arranged on the lower shell and encloses a containing space, a second suction channel is formed in the top of the upper shell, and a suction head is arranged on the upper shell; a first suction channel is formed in the suction head, and the first suction channel and the second suction channel are communicated with each other;

[0020] An air passage is arranged in the lower shell, the top end of the air passage extends upward and is communicated with the containing space, the bottom end of the air passage extends downward through the lower shell, and the other end of the connecting pipe is inserted into the bottom end of the air passage.

[0021] Further, the top end of the ventilation pipeline is inserted with an extension pipe, the top of the extension pipe is provided with a horizontal outwardly protruding blocking plate; the upper end side of the extension pipe is provided with an air inlet opening, the extension pipe is provided with an air extraction channel, the top end of the air extraction channel is communicated with the air inlet opening, and the bottom end of the air extraction channel is communicated with the ventilation pipeline.

[0022] Further, the outer cylinder comprises an upper cylinder and a lower cylinder, the upper cylinder is fixed on the lower cylinder and encloses a driving cavity, and the inner cylinder is located in the driving cavity and fixedly connected with the inner top surface of the upper cylinder.

[0023] The outer top surface of the upper cylinder is fixed with a handle.

[0024] Compared with the background art, the double-cylinder nasal aspirator has the following advantages:

[0025] In the air extraction process, the piston moves upwards, the top of the inclined sealing part is in close contact with the inner wall of the inner cylinder, and the internal air of the outer cylinder, the connecting pipe and the suction assembly is extracted, so that the foreign matter in the nasal cavity of the infant is extracted, and the umbrella-shaped valve ensures that the gas can enter the inner cylinder from the outer cylinder; in the piston downward resetting process, the umbrella-shaped valve effectively prevents the gas in the inner cylinder from entering the outer cylinder, the adhesion between the top of the inclined sealing part and the inner wall of the inner cylinder is reduced, the gas in the inner cylinder passes through the inclined sealing part from below the piston to above the piston, is discharged through the exhaust gap, and the gas is prevented from returning to the suction assembly and impacting the nasal cavity of the infant. Meanwhile, the outer cylinder surrounds the inner cylinder, protects the inner cylinder, prevents the hand holding force from being transmitted to the inner cylinder, and further avoids deformation of the inner cylinder caused by stress, and affects the air extraction efficiency of the piston. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structure schematic view of the double-cylinder nasal aspirator;

[0027] Figure 2 It is a sectional structure schematic view of the double-cylinder nasal aspirator;

[0028] Figure 3 It is an enlarged schematic view of the A part structure of the double-cylinder nasal aspirator;

[0029] Figure 4 It is a piston structure schematic view of the double-cylinder nasal aspirator;

[0030] Figure 5 It is an exploded piston structure schematic view of the double-cylinder nasal aspirator;

[0031] Figure 6 It is an umbrella-shaped valve structure schematic view of the double-cylinder nasal aspirator;

[0032] Figure 7 The umbrella-shaped valve bottom structure schematic view of the double-cylinder nose aspirator;

[0033] Figure 8 The explosion structure schematic view of the umbrella-shaped valve of the double-cylinder nose aspirator;

[0034] Figure 9 The second structure schematic view of the double-cylinder nose aspirator;

[0035] Figure 10 The gas flow direction schematic view of the structure air extraction process of the double-cylinder nose aspirator;

[0036] Figure 11 The piston reset gas flow direction schematic view of the double-cylinder nose aspirator.

[0037] Mark explanation:

[0038] 1, suction assembly;11, upper shell;111, suction head;1111, first suction channel;112, second suction channel;12, lower shell;121, air duct;122, extension pipe;1221, baffle;1222, air inlet opening;1223, air extraction channel;13, containing space;

[0039] 2, connecting pipe;

[0040] 3, air extraction mechanism;31, outer cylinder;311, upper cylinder;3111, inner cylinder;3112, exhaust accommodation hole;3113, handle;312, lower cylinder;3121, air inlet pipe;313, driving cavity;32, piston;321, piston head;3211, upper pressing plate;3212, plug-in channel;3213, lower pressing plate;3214, plug-in slot;3215, embedded space;322, piston sealing ring;3221, embedded part;3222, inclined sealing part;323, connecting rod;3231, driving ring;3232, plug rod;324, elastic reset member;33, umbrella-shaped valve;331, valve body;3311, air inlet channel;3312, protruding part;332, flexible mounting column;3321, limiting protrusion;3322, flexible valve piece;333, valve body sealing ring. Specific implementation

[0041] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the following will be further detailed by combining with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0042] In addition, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element of the utility model must have a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0043] When an element is referred to as being "fixed" or "set" or "provided" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0044] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", and "connection" should be broadly understood, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] Embodiment

[0046] Please refer to Figures 1-11 The embodiment provided a double-barreled nose aspirator, including a suction assembly 1, a connecting pipe 2 and a suction mechanism 3; both ends of the connecting pipe 2 are communicated with the suction assembly 1 and the suction mechanism 3 respectively. The suction mechanism 3 includes an outer cylinder 31, a piston 32 and an umbrella valve 33, the inner cylinder 3111 is arranged in the outer cylinder 31, the exhaust clearance hole 3112 is arranged at the top of the outer cylinder 31, and the exhaust clearance hole 3112 is communicated with the inner cylinder 3111. The piston 32 is arranged in the inner cylinder 3111, the outer side of the piston 32 is provided with an inclined sealing part 3222, the inclined sealing part 3222 is inclined from the bottom to the top, and the top of the inclined sealing part 3222 is in abutting contact with the inner side wall of the inner cylinder 3111. The umbrella valve 33 is arranged at the bottom of the inner cylinder 3111.

[0047] Please refer to Figure 10 And Figure 11As shown, in the air extraction process, the piston 32 goes up, the top of the inclined sealing part 3222 is in close contact with the inner wall of the inner cylinder 3111, and the air inside the outer cylinder 31, the connecting pipe 2 and the suction assembly 1 is extracted, so as to achieve the purpose of extracting foreign matters in the nasal cavity of the infant, and the umbrella-shaped valve 33 ensures that the gas can enter the inner cylinder 3111 from the outer cylinder 31; in the piston 32 downward resetting process, the umbrella-shaped valve 33 effectively prevents the gas in the inner cylinder 3111 from entering the outer cylinder 31, the adhesion between the top of the inclined sealing part 3222 and the inner wall of the inner cylinder 3111 is reduced, the gas in the inner cylinder 3111 passes through the inclined sealing part 3222 below the piston 32 to the upper part of the piston 32, is discharged through the exhaust gap 3112, and the gas is prevented from returning to the suction assembly 1, so as to avoid the impact on the nasal cavity of the infant. At the same time, the outer cylinder 31 surrounds the inner cylinder 3111, protects the inner cylinder 3111, prevents the hand holding force from being transmitted to the inner cylinder 3111, and further avoids that the inner cylinder 3111 is deformed under stress, thereby affecting the air extraction efficiency of the piston 32.

[0048] And the inner cylinder 3111 is located in the outer cylinder 31 and in a suspended state, which maximally reduces the possibility that the foreign matters entering the outer cylinder 31 through the connecting pipe 2 are sucked into the inner cylinder 3111, and only the outer cylinder 31 needs to be cleaned during cleaning, thereby protecting the lubricating layer between the inner wall of the inner cylinder 3111 and the piston 32 and saving cost.

[0049] Please refer to Figures 2-5 As shown, in the embodiment, the piston 32 includes a piston head 321, a connecting rod 323 and a piston sealing ring 322, and the piston sealing ring 322 is sleeved on the side of the piston head 321. The bottom end of the connecting rod 323 is connected with the piston head 321, the top end of the connecting rod 323 passes through the exhaust gap 3112 and extends outward. Further, the top of the connecting rod 323 is connected with a driving ring 3231, the driving ring 3231 is provided for the fingers to pass through and drive the piston head 321 to go up for air extraction or to go down for resetting.

[0050] Specifically, the piston head 321 includes an upper pressing plate 3211 and a lower pressing plate 3213, and the piston sealing ring 322 includes an embedded part 3221 and the inclined sealing part 3222. The bottom end of the connecting rod 323 passes through the upper pressing plate 3211 and is connected with the lower pressing plate 3213. In the embodiment, the middle part of the upper pressing plate 3211 is provided with an insertion channel 3212, the middle part of the lower pressing plate 3213 is provided with an insertion slot 3214, and the insertion slot 3214 is provided with an internal thread. The bottom end of the connecting rod 323 is provided with an outwardly protruding insertion rod 3232, the diameter of the insertion rod 3232 is smaller than that of the connecting rod 323, the outer side of the insertion rod 3232 is provided with an external thread, and the insertion rod 3232 is threadedly connected with the insertion slot 3214 through the insertion channel 3212. The bottom end of the connecting rod 323 abuts against the upper pressing plate 3211, thereby ensuring the stability of the installation of the upper pressing plate 3211 and the lower pressing plate 3213. The connecting rod 323 is detachably connected with the piston head 321 through the internal thread and the external thread, thereby facilitating the installation and dismounting and maintenance of the piston 32. The embedded space 3215 is arranged between the end parts of the upper pressing plate 3211 and the lower pressing plate 3213, the embedded part 3221 is arranged in the embedded space 3215, and the top surface and the bottom surface of the embedded part 3221 are respectively in close contact with the bottom surface of the upper pressing plate 3211 and the top surface of the lower pressing plate 3213. The upper pressing plate 3211 and the lower pressing plate 3213 press and limit the piston sealing ring 322 from the upper side and the lower side, thereby avoiding the deformation of the piston sealing ring 322 under stress, the piston sealing ring 322 from being separated from the embedded space 3215, and the influence on the continuity of the working of the piston 32. Please refer to FIGS. 12 and 13. Figure 3 and Figure 11 As shown in FIGS. 12 and 13, the bottom inner side of the inclined sealing part 3222 is connected with the outer side of the embedded part 3221, and the top inner side of the inclined sealing part 3222 is spaced apart from the end part of the upper pressing plate 3211, thereby providing a movement space for the top part of the inclined sealing part 3222, facilitating the movement of the top part of the inclined sealing part 3222 toward the end part of the upper pressing plate 3211 under the pushing of the gas below the piston 32 during the resetting of the piston 32, forming an exhaust passage, and allowing the gas below the piston 32 to enter above the piston 32 and finally be discharged through the exhaust gap 3112. The bottom outer side of the inclined sealing part 3222 is spaced apart from the inner side wall of the inner cylinder 3111, thereby providing a gap for the gas below the piston 32 to enter and better push the top part of the inclined sealing part 3222 to move.

[0051] Further, the piston 32 further includes an elastic resetting member 324, the elastic resetting member 324 is arranged around the connecting rod 323, and the two ends of the elastic resetting member 324 are respectively in abutment with the top surface of the upper pressing plate 3211 and the inner top surface of the outer cylinder 31. During the air exhaust process, the piston 32 moves upward, compresses the elastic resetting member 324, and after the air exhaust is completed, the elastic resetting member 324 provides a downward resetting force for the piston 32, drives the piston 32 to move downward and resets, and discharges the gas below the piston 32. In the embodiment, the elastic resetting member 324 is a spring, and the same can also be other structures capable of compression and rebound.

[0052] Please refer to Figure 2 , Figure 3 and Figures 6-8 , in particular, the umbrella-shaped valve 33 includes a valve body 331 and a flexible mounting column 332, the valve body 331 is fixed at the bottom of the inner cylinder 3111, in this embodiment, the valve body 331 is detachably fixed at the bottom of the inner cylinder 3111, and the valve body 331 is provided with a valve body sealing ring 333 on the side, the valve body sealing ring 333 is embedded between the valve body 331 and the inner cylinder 3111, effectively improving the air tightness of the bottom of the inner cylinder 3111. The bottom end of the flexible mounting column 332 extends downward through the valve body 331, the lower part of the flexible mounting column 332 is provided with a limiting protrusion 3321, the limiting protrusion 3321 abuts against the bottom surface of the valve body 331, the limiting protrusion 3321 provides a limiting force to the flexible mounting column 332 below the valve body 331, ensuring the stability of the flexible mounting column 332 installed on the valve body 331. At least one air inlet channel 3311 is formed in the valve body 331, in this embodiment, the number of air inlet channels 3311 is four, and the four air inlet channels 3311 are distributed at intervals on the side of the flexible mounting column 332. The top end of the flexible mounting column 332 is provided with a flexible valve plate 3322 extending horizontally outward, which covers the upper opening of the air inlet channel 3311. During the air extraction process, the air in the outer cylinder 31 enters the air inlet channel and pushes the flexible valve plate 3322 to open the upper opening of the air inlet channel 3311, so as to enter the inner cylinder 3111. During the downward resetting process of the piston 32, the piston 32 pushes the gas downward, so that the flexible valve plate 3322 is in contact with the upper opening of the air inlet channel 3311, thereby closing the air inlet channel 3311. The air below the piston 32 can only push the top of the inclined sealing part 3222 to enter the upper part of the piston 32, realizing the exhaust of the air below the piston 32, and ensuring that the piston 32 has good air extraction capacity in the next air extraction process.

[0053] Further, the middle part of the valve body 331 is provided with a protrusion 3312 protruding downward, the air inlet channel 3311 is formed with the protrusion 3312, and the free end of the flexible valve plate 3322 extends horizontally outward to the top surface edge of the protrusion 3312. The protrusion 3312 makes the top of the valve body 331 form a concave curved surface, which effectively increases the contact area between the flexible valve plate 3322 and the valve body 331 during the downward movement of the piston 32, and further improves the sealing performance of the flexible valve plate 3322 to the air inlet channel 3311.

[0054] Please refer to Figure 1 and Figure 2As shown, in the embodiment, the outer side of the outer cylinder 31 is provided with an air inlet pipe 3121, the air inlet pipe 3121 is in communication with the outer cylinder 31, and one end of the connecting pipe 2 is inserted into the air inlet pipe 3121. The air inlet pipe 3121 is arranged on the side of the outer cylinder 31, so that the bottom surface of the outer cylinder 31 is a plane, facilitating the placement of the outer cylinder 31 and improving the convenience of use.

[0055] Specifically, the outer cylinder 31 includes an upper cylinder 311 and a lower cylinder 312, the upper cylinder 311 is fixed on the lower cylinder 312 and encloses a driving cavity 313. In the embodiment, the upper cylinder 311 and the lower cylinder 312 are connected by threads, and can also be detachably connected by a sliding groove structure. The inner cylinder 3111 is located in the driving cavity 313, and the top of the inner cylinder 3111 is fixedly connected to the inner top surface of the upper cylinder 311. The outer top surface of the upper cylinder 311 is fixedly provided with a handle 3113. The handle 3113 is used for the user to grasp with hands, facilitating the overall taking, moving or placing of the double-cylinder nose aspirator. Figure 9 As shown, similarly, the height of the upper cylinder 311 can be greater than the height of the lower cylinder 312, so that the inner side wall of the upper cylinder 311 and the inner cylinder 3111 have a large height difference, reducing the difficulty of forming the upper cylinder 311 and the lower cylinder 312.

[0056] As shown, Figure 1 and Figure 2 As shown, in the embodiment, the suction assembly 1 includes an upper shell 11 and a lower shell 12 connected to each other; the upper shell 11 is arranged on the lower shell 12 and encloses a containing space 13. The top of the upper shell 11 is provided with a second suction passage 112, and is provided with a suction head 111, the suction head 111 is provided with a first suction passage 1111, and the first suction passage 1111 and the second suction passage 112 are in communication. The foreign matter in the nasal cavity of the infant passes through the first suction passage 1111 and the second suction passage 112 into the containing space 13 for collection. In the embodiment, the suction head 111 is a flexible suction head 111, avoiding damage to the nasal cavity of the infant by the suction head 111. Similarly, the suction head 111 can be a curved suction head 111, ensuring that the suction assembly 1 is upright during use, preventing foreign matter from entering the connecting pipe 2.

[0057] The lower shell 12 is provided with a ventilation pipe 121, the top end of the ventilation pipe 121 extends upward and communicates with the containing space 13. The upper end opening height of the ventilation pipe 121 is raised, the containing capacity of the containing space 13 is improved, and foreign matters are prevented from directly entering the connecting pipe 2. The bottom end of the ventilation pipe 121 extends downward through the lower shell 12, and the other end of the connecting pipe 2 is inserted into the bottom end of the ventilation pipe 121. In the embodiment, the top end of the ventilation pipe 121 is inserted with an extension pipe 122, the height of the ventilation pipe 121 is further improved, and the containing capacity of the containing space 13 is improved. The top of the extension pipe 122 is provided with a horizontal outwardly protruding blocking plate 1221; the upper end side of the extension pipe 122 is provided with an air inlet opening 1222, and the extension pipe 122 is provided with an air suction channel 1223, the top end of the air suction channel 1223 communicates with the air inlet opening 1222, and the bottom end of the air suction channel 1223 communicates with the ventilation pipe 121. The air inlet opening 1222 is located below the blocking plate 1221, the blocking plate 1221 blocks the falling foreign matters, and prevents the foreign matters from directly falling into the air inlet opening 1222, and the air inlet opening 1222 is arranged on the side surface of the extension pipe 122, which further reduces the possibility of the foreign matters directly falling into the air inlet opening 1222. Similarly, the extension pipe 122 can be integrally formed with the top of the air inlet pipe 3121, the number of parts is reduced, and the assembly time is reduced.

[0058] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A dual-barrel nasal aspirator, characterized in that, Includes suction components, connecting pipes, and a vacuum mechanism; The two ends of the connecting tube are respectively connected to the suction component and the air extraction mechanism; The air extraction mechanism includes an outer cylinder, a piston, and an umbrella valve. An inner cylinder is provided inside the outer cylinder. An exhaust clearance hole is provided at the top of the outer cylinder, and the exhaust clearance hole is connected to the inner cylinder. The piston is provided inside the inner cylinder. An inclined sealing part is provided on the outside of the piston. The inclined sealing part is inclined outward from the bottom end to the top end, and the top end of the inclined sealing part abuts against the top of the inner wall of the inner cylinder. The umbrella-shaped valve is located at the bottom of the inner cylinder.

2. The dual-barrel nasal aspirator according to claim 1, characterized in that: The piston includes a piston head, a connecting rod, and a piston sealing ring. The piston sealing ring is sleeved on the side of the piston head. The bottom end of the connecting rod is connected to the piston head, and the top end of the connecting rod passes through the exhaust relief hole and extends outward.

3. The dual-barrel nasal aspirator according to claim 2, characterized in that: The piston head includes an upper pressure plate and a lower pressure plate, and the piston sealing ring includes an embedded portion and an inclined sealing portion. The bottom end of the connecting rod passes through the upper pressure plate and connects to the lower pressure plate; an embedding space is provided between the ends of the upper pressure plate and the lower pressure plate, and the embedding part is disposed in the embedding space, with the top and bottom surfaces of the embedding part respectively fitting against the bottom surface of the upper pressure plate and the top surface of the lower pressure plate; the bottom inner side of the inclined sealing part is connected to the outer side of the embedding part, the top inner side of the inclined sealing part is spaced apart from the end of the upper pressure plate, and the bottom outer side of the inclined sealing part is spaced apart from the inner wall of the inner cylinder.

4. The dual-barrel nasal aspirator according to claim 3, characterized in that: The piston also includes an elastic reset member, which surrounds the circumference of the connecting rod, and the two ends of the elastic reset member abut against the top surface of the upper pressure plate and the inner top surface of the outer cylinder, respectively.

5. The dual-barrel nasal aspirator according to claim 1, characterized in that: The umbrella valve includes a valve body and a flexible mounting post, wherein the valve body is fixed to the bottom of the inner cylinder; The bottom end of the flexible mounting post extends downward through the valve body, and a limiting protrusion is provided at the lower part of the flexible mounting post, which abuts against the bottom surface of the valve body. The valve body has at least one air intake channel, and the top of the flexible mounting post is provided with a flexible valve plate extending horizontally outward, which covers the upper opening of the air intake channel.

6. The dual-barrel nasal aspirator according to claim 5, characterized in that: The valve body has a downward protrusion in the middle, the air intake channel is provided on the protrusion, and the free end of the flexible valve plate extends horizontally outward to the top edge of the protrusion.

7. The dual-barrel nasal aspirator according to claim 1, characterized in that: An air inlet pipe is provided on the outer side of the outer cylinder, and the air inlet pipe is connected to the outer cylinder. One end of the connecting pipe is inserted into the air inlet pipe.

8. The dual-barrel nasal aspirator according to claim 1, characterized in that: The suction assembly includes an upper shell and a lower shell connected to each other; the upper shell is disposed on the lower shell and encloses to form an accommodating space; a second suction channel is opened at the top of the upper shell and a suction head is provided thereon; a first suction channel is opened at the suction head; the first suction channel and the second suction channel are interconnected. A ventilation pipe is provided inside the lower shell. The top end of the ventilation pipe extends upward and is connected to the accommodating space. The bottom end of the ventilation pipe extends downward through the lower shell. The other end of the connecting pipe is inserted into the bottom end of the ventilation pipe.

9. The dual-barrel nasal aspirator according to claim 8, characterized in that: An extension tube is inserted into the top of the ventilation pipe, and a horizontally protruding baffle plate is provided at the top of the extension tube; an air inlet is provided on the upper side of the extension tube, and an air extraction channel is provided inside the extension tube. The top of the air extraction channel is connected to the air inlet, and the bottom of the air extraction channel is connected to the ventilation pipe.

10. The dual-barrel nasal aspirator according to claim 1, characterized in that: The outer cylinder includes an upper cylinder and a lower cylinder. The upper cylinder is fixed on the lower cylinder and together form a driving cavity. The inner cylinder is located inside the driving cavity, and the top of the inner cylinder is fixedly connected to the inner top surface of the upper cylinder. A handle is fixed to the outer top surface of the upper cylinder.

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