Nasal cavity flushing head and flusher

Abstract

The utility model relates to a nasal cavity flushing head and a flusher, and belongs to the technical field of medical instruments. Comprising an outer-layer pipe provided with a cavity formed in the axial direction of the outer-layer pipe; the lining pipe is coaxially arranged in the cavity of the outer-layer pipe, and the lining pipe comprises a flow channel formed in the axial direction of the lining pipe and used for allowing a liquid medium to flow; the head part is communicated with the flow channel and is used for enabling the liquid medium to flow out; and the flexible pipe section A forms one part of the flow channel. The flexible pipe section A responds to the flow velocity exceeding the threshold value, and radial collapse occurs. The speed and the pressure of water flowing out of the end of the flushing head finally are effectively limited or reduced to a low level which is safe to the mucous membrane of the nasal cavity of a child.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a nasal cavity irrigation head. Background Art

[0002] Nasal cavity irrigation is a method widely used in personal health care and the adjuvant treatment of nasal diseases. It uses a nasal cavity irrigator to deliver a specific solution (usually physiological saline) into the nasal cavity to remove nasal secretions (such as nasal mucus), inhaled particulate matter (such as allergens like dust and pollen), and pathogens, so as to clean and moisten the nasal cavity and relieve symptoms such as nasal congestion, sinusitis, and allergic rhinitis.

[0003] Existing nasal cavity irrigators usually have different working modes. For example, there are "adult mode" and "child mode". The "adult mode" usually provides a relatively high flow rate and pressure to obtain a stronger cleaning effect; while the "child mode" provides a lower flow rate and pressure to gently irrigate the relatively sensitive and fragile nasal cavity of children to avoid discomfort or injury. The switching between these modes is usually achieved through mechanical structures such as physical buttons, knobs, or switches provided on the body of the nasal cavity irrigator.

[0004] However, when children are undergoing nasal cavity irrigation, there is a risk of accidentally touching the mode switching key. If the device accidentally switches from the low-flow "child mode" to the high-flow "adult mode", the suddenly increased water impact force may cause irritation, discomfort, or even substantial harm to the delicate nasal mucosa of children. Summary of the Utility Model

[0005] To solve the above problems of the existing technology, the utility model provides a nasal cavity irrigation head and an irrigator.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is:

[0007] Provide a nasal cavity irrigation head, including:

[0008] An outer layer tube having a cavity formed along its axial direction;

[0009] A lining tube coaxially arranged in the cavity of the outer layer tube, and the lining tube includes:

[0010] A flow channel formed along its axial direction for the flow of a liquid medium;

[0011] A head communicated with the flow channel for the outflow of the liquid medium; and,

[0012] A flexible tube section A that forms part of the flow channel;

[0013] Wherein, the pipe section A is configured to radially collapse when the flow velocity of the liquid medium flowing through the flow channel exceeds a predetermined threshold value.

[0014] Preferably, the flow channel includes:

[0015] A rigid pipe section B, which is communicated with the pipe section A;

[0016] Wherein, along the flowing direction of the liquid medium, the pipe section B is located downstream of the pipe section A;

[0017] Moreover, the diameter of the pipe section B is larger than that of the pipe section A, and the diameter of the pipe section B increases along the flowing direction of the liquid medium.

[0018] Preferably, it includes:

[0019] An adjusting structure, which is arranged between the outer pipe and the inner lining pipe;

[0020] Wherein, the adjusting structure is configured to drive the inner lining pipe to switch between a first operation mode and a second operation mode;

[0021] Wherein, in the first operation mode, the pipe section A is allowed to radially collapse when the flow velocity of the liquid medium flowing through the flow channel exceeds a predetermined threshold value;

[0022] Wherein, in the second operation mode, the radial collapse of the pipe section A is inhibited.

[0023] Preferably, the adjusting structure is configured to drive the outer pipe to rotate relative to the inner lining pipe due to an external force, and cause the pipe section B to axially displace, so that the pipe section A is elastically stretched or elastically restored.

[0024] Preferably, the adjusting structure is a threaded engagement structure, and this threaded engagement structure includes:

[0025] A first threaded section formed on the inner wall surface of the outer pipe;

[0026] A second threaded section formed on the outer wall surface of the inner lining pipe;

[0027] Wherein, the first threaded section is threadedly engaged with the second threaded section.

[0028] Preferably, an air flow space is defined between the outer pipe and the inner lining pipe;

[0029] At least one air hole for communicating with the outside is arranged in the air flow space.

[0030] Preferably, the outer pipe has a flexible wing part;

[0031] Wherein, along the flow direction of the liquid medium, the wing portion is located downstream of the air hole and the wing portion is configured to separate the nasal cavity environment from the external environment.

[0032] Preferably, the wing portion has an annular sheet-like structure that extends radially outward from the outer wall surface of the outer layer tube;

[0033] Wherein, the annular sheet-like structure has a thickness that gradually thins towards its free outer edge.

[0034] Preferably, the outer layer tube has:

[0035] A distal end located on the liquid medium outflow side;

[0036] And a proximal end opposite to the distal end;

[0037] Wherein, the distal end and the head of the inner lining tube together form a smooth transition with a rounded corner;

[0038] The proximal end is adapted to be detachably connected to a nasal cavity irrigator body.

[0039] The present utility model further provides an irrigator, comprising:

[0040] An irrigator body;

[0041] The nasal cavity irrigation head as described in any one of the above technical solutions, which is connected to the liquid medium pipeline of the irrigator body.

[0042] The present utility model provides a nasal cavity irrigation head and an irrigator, and the beneficial effects of the present utility model are reflected in:

[0043] Due to its special structure sensitive to flow velocity, the flexible pipe section A will immediately and automatically respond to this super-threshold flow velocity and undergo radial collapse. This collapse behavior is like a built-in passive safety valve without external instructions. It quickly and significantly increases the local resistance of the flow channel, effectively limiting or reducing the water flow velocity and pressure finally flowing out from the end of the irrigation head to a lower level that is safe for the nasal mucosa of children. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic structural diagram of the outer layer tube in the nasal cavity irrigation head proposed by the present utility model;

[0045] Figure 2 It is a schematic structural diagram of the inner lining tube in the nasal cavity irrigation head proposed by the present utility model;

[0046] Figure 3 It is one of the schematic structural diagrams of the nasal cavity irrigation head proposed by the present utility model (the pipe section A is in the initial state);

[0047] Figure 4 The second structural schematic diagram of the nasal cavity irrigation head proposed by the present utility model (the pipe section A undergoes radial collapse);

[0048] Figure 5 The third structural schematic diagram of the nasal cavity irrigation head proposed by the present utility model (the pipe section A undergoes axial elastic stretching);

[0049] Figure 6 The fourth structural schematic diagram of the nasal cavity irrigation head proposed by the present utility model (the diameter of the pipe section B increases)

[0050] Figure 7 The structural schematic diagram of the irrigator proposed by the present utility model.

[0051] Explanation of reference numerals:

[0052] 1. Outer tube; 101. Distal end; 102. Proximal end; 2. Liner tube; 201. Flow channel; 202. Head; 203. Pipe section A; 204. Pipe section B; 3. Adjusting structure; 301. First threaded section; 302. Second threaded section; 401. Air flow space; 402. Air hole; 5. Wing part; 6. Irrigator body. Specific embodiments

[0053] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0054] Please refer to Figures 1-7 As shown, the specific embodiments provided by the present utility model are as follows:

[0055] This embodiment discloses a nasal cavity irrigation head specifically designed for children. The irrigation head has an interface detachably connected to the main body of the nasal cavity irrigator, allowing users to install and use this special irrigation head when performing nasal cavity irrigation for children, and it can be replaced with a standard or adult-use irrigation head in the adult usage scenario.

[0056] Refer to Figure 1 As shown, the nasal cavity irrigation head includes an outer tube 1. The outer tube 1 is usually made of a medical-grade material with sufficient structural rigidity, such as polypropylene, polycarbonate, or similar rigid plastics, to provide overall support and maintain its shape. An internal cavity is formed along the axial direction of the outer tube 1 (i.e., the general direction of the irrigation fluid flow).

[0057] Refer to Figure 2 And Figure 3As shown, inside the cavity of the outer tube 1, a lining tube 2 is coaxially arranged, that is, their axes are basically coincident or parallel. A flow channel 201 is formed along the axial direction of the lining tube 2, and this flow channel 201 is used to carry and guide a liquid medium (such as physiological saline) from the liquid supply end of the rinser to the outlet end of the rinsing head.

[0058] The lining tube 2 has an end directly communicating with the flow channel 201, that is, the head 202. This end is used to smoothly export the liquid medium in the flow channel 201 and send it into the user's nasal cavity in a suitable manner, such as in the form of a columnar or misty spray.

[0059] On the above basis, the lining tube 2 includes a flexible tube section A203 in its structure, and this flexible tube section A203 is a part of the overall path of the flow channel 201. This flexible tube section A203 is made of a flexible material with good elasticity and biocompatibility, such as medical-grade silicone rubber or thermoplastic elastomer, etc.

[0060] Reference Figure 4 As shown, this flexible tube section A203 is configured to have specific fluid response characteristics. Specifically, when the flow rate of the liquid medium flowing through the flow channel 201 exceeds a preset threshold, this flexible tube section A203 will undergo radial collapse. This radial collapse is usually due to the fact that when high-speed fluid flows through the flexible tube section A203, according to Bernoulli's principle, the hydrostatic pressure inside the tube section A203 will be significantly reduced, resulting in an increase in the pressure difference acting inside and outside the tube section A203. When this pressure difference exceeds the supporting force that the tube section A203 can withstand, the tube wall of the tube section A203 will buckle or contract inward, that is, radial collapse.

[0061] Among them, the preset threshold can be set according to the application scenario. For example, for a basic model designed for a specific population such as children, or for safety considerations, corresponding to a flow rate or pressure level that may cause discomfort or pose a safety risk.

[0062] Based on this, once radial collapse occurs, the effective cross-sectional area of the flow channel 201 at this flexible tube section A203 will be significantly reduced, which will cause the resistance of the fluid passing through here to increase sharply, thereby automatically and passively restricting the actual flow rate and pressure through the rinsing head and preventing the nasal cavity from being impacted or damaged by excessive flow rates. When the driving pressure decreases or the flow rate drops below the preset threshold, the flexible tube section A203 can rely on its own elasticity to return to a state close to its original, non-collapsed state, and the flow channel 201 resumes the passage.

[0063] In a specific embodiment, the flexible pipe section A203 is made of a medical-grade silicone material, and its Shore A hardness is preferably in the range of 20 to 50. For example, silicone with a Shore A hardness of 30 can be selected. Such a hardness can ensure that the pipe section maintains its basic shape during use and is soft enough to undergo the required elastic collapse when the threshold flow rate is reached.

[0064] In another specific embodiment, the wall thickness of the flexible pipe section A203 is a specific value, for example, between 0.5 mm and 1.5 mm, which is significantly thinner than the other rigid parts of the inner liner pipe 2. The thinner wall thickness reduces its structural ability to resist the radial pressure difference, making it easier to collapse.

[0065] In another specific embodiment, the cross-section of the flexible pipe section A203 may not be completely circular. For example, it is slightly oval, or there are grooves or thinning structures in specific areas of the pipe wall of the pipe section A203, such as one or two opposite lines along the axial direction. This can guide or prompt the radial collapse to occur along a predetermined direction with the least resistance, making the collapse process more stable and predictable.

[0066] In summary, when an unexpected situation occurs, for example, a child accidentally touches the switch or button on the nasal irrigator during the flushing process or preparation process, or the user accidentally operates and selects a high flow rate / high pressure setting that is not suitable for children, the flow rate of the liquid medium delivered to the internal flow channel 201 of the nasal irrigator provided in this embodiment will instantly attempt to exceed the preset safety threshold.

[0067] At this critical moment, due to its special structure sensitive to the flow rate, the flexible pipe section A203 will immediately and automatically respond to this super-threshold flow rate and undergo radial collapse. This collapse behavior is like a built-in passive safety valve that does not require external instructions. It quickly and significantly increases the local resistance of the flow channel 201, effectively limiting or reducing the flow rate and pressure of the water finally flowing out of the end of the irrigator head to a lower level that is safe for the nasal mucosa of children.

[0068] Therefore, even if a misoperation attempts to start or switch to the high flow rate mode, the nasal irrigator head provided in this embodiment can rely on its inherent physical properties for self-regulation and protection, effectively preventing the too high and too strong water flow from directly impacting and harming the delicate nasal cavity of children, and avoiding potential bleeding, pain or discomfort. This greatly improves the passive safety of the product during use, reduces the dependence on the user to always be vigilant against misoperations, and provides a more reliable and reassuring use experience.

[0069] Reference Figure 6As shown, in another embodiment, the flow channel 201 further includes a rigid pipe section B204 downstream of the flexible pipe section A203. The rigid pipe section B204 communicates with the downstream end of the flexible pipe section A203, enabling the liquid medium to flow smoothly from the flexible pipe section A203 into the rigid pipe section B204. This rigid pipe section B204 is made of a medical-grade rigid plastic similar to the main body of the outer pipe 1 and having high mechanical strength, ensuring that the shape of this section of the flow channel 201 is stable during use.

[0070] On this basis, the inner diameter of the starting end of the rigid pipe section B204, that is, the inner diameter at the connection with the flexible pipe section A203, is larger than the nominal inner diameter of the flexible pipe section A203 in its normal non-collapsed state. Thus, when the liquid medium flows from the flexible pipe section A203 into the rigid pipe section B204, it will experience an expansion of the cross-sectional area.

[0071] In addition, the inner diameter of the rigid pipe section B204 does not remain constant, but shows a gradually increasing trend along the direction of liquid medium flow (i.e., from upstream to downstream, towards the final water outlet end), thereby forming an expanding or diffusing flow channel 201.

[0072] Predictably, when the fluid flows from the narrower flexible pipe section A203 into the wider and continuously expanding rigid pipe section B204, the velocity of the fluid will decrease, and at the same time, its static pressure will be partially restored. For the nasal irrigation head used by children, it can make the water flow finally ejected from the end more gentle and stable, reducing the impact force of the water flow, thereby improving the comfort and safety of children's use.

[0073] In another embodiment, it further includes an adjustment structure 3. The adjustment structure 3 is arranged between the outer pipe 1 and the inner lining pipe 2, and its purpose is to drive or allow the inner lining pipe 2 to switch between at least two different operating modes, namely the first operating mode and the second operating mode.

[0074] Specifically, the first operating mode is a safety or low-flow mode. For example, it can be defined as a children's mode. In this mode, the adjustment structure 3 makes the flexible pipe section A203 in its natural or preset initial state, at which time it allows radial collapse. That is, when the flow rate of the liquid medium flowing through the flow channel 201 exceeds the predetermined threshold set for this mode, the flexible pipe section A203 will collapse, thereby playing a safety protection role in restricting the flow rate and pressure.

[0075] The second operating mode is a standard or high-flow mode. For example, it can be defined as the adult mode. When switched to this mode, the adjustment structure 3 changes the operating state of the flexible pipe section A203, suppressing its radial collapse behavior. This means that in this mode, even when the flow rate is high (within the normal adult usage range), the flexible pipe section A203 will not easily collapse or the degree of collapse will be significantly reduced, thus allowing a higher flow rate of the liquid medium to pass through smoothly, meeting the cleaning needs or specific flushing requirements of adult users.

[0076] Reference Figure 5 As shown, in a specific embodiment, the adjustment structure 3 is configured to allow the user to drive the displacement of the pipe section B204 of the inner liner pipe 2 along its axial direction by rotating the outer layer pipe 1 (relative to the inner liner pipe 2). For example, a first threaded section 301 is provided on the inner wall surface of the outer layer pipe 1, and a second threaded section 302 that mates with it is provided on the outer wall surface of the non-flexible part of the inner liner pipe 2, such as the rigid pipe section B204 or a specific connection section. The pipe section of the inner liner pipe 2 below the pipe section A203 is axially fixed, for example, forming a rotational connection with the outer layer pipe 1. By rotating the outer layer pipe 1 to a specific angle, such as 90 degrees or 180 degrees, the pipe section B204 undergoes axial displacement, and thus the pipe section A203 is elastically stretched. That is to say, by applying elastic stretching to the flexible pipe section A203 to introduce axial tension within its pipe wall, this tension significantly improves the ability of the pipe wall to resist buckling instability caused by the radial pressure difference. As a result, a higher flow rate (to generate a lower internal pressure and a larger internal and external pressure difference) is required to reach the critical condition for the pipe wall to collapse. In other words, elastic stretching effectively suppresses the occurrence of radial collapse.

[0077] In another embodiment, an annular or partially annular air flow space 401 is defined between the outer layer pipe 1 and the inner liner pipe 2. This air flow space 401 is the gap between the inner wall of the outer layer pipe 1 and the outer wall of the inner liner pipe 2.

[0078] To ensure that the air flow space 401 can effectively exchange gas with the environment outside the flushing head, at least one air hole 402 is provided on the pipe wall of the outer layer pipe 1. The position of this air hole 402 can be set on the side wall of the outer layer pipe 1 away from the liquid medium outflow end, or other positions that do not affect the user's grip and use. The air hole 402 penetrates the wall thickness of the outer layer pipe 1, directly connecting the internal air flow space 401 with the external atmospheric environment.

[0079] Thus, when the pipe section A203 undergoes radial collapse due to internal low pressure, the air pressure outside it (i.e., within the air flow space 401) can be balanced with the atmospheric pressure through the air holes 402, thereby ensuring the establishment and maintenance of the effective (internal and external) pressure difference required for the radial collapse of the pipe section A203. And when the inner liner tube 2 moves axially inside the outer tube 1, the volume of the air flow space 401 between the inner and outer tubes changes. The presence of the air holes 402 allows air to freely flow into or out of this space, effectively avoiding the pneumatic resistance generated by gas compression, thus making the operation of the user to rotate the outer tube 1 for mode switching easier and smoother.

[0080] In a specific embodiment, the outer tube 1 is further provided with a flexible wing portion 5 on its outer peripheral wall. The wing portion 5 is preferably made of a medical-grade material that is soft, elastic, and has good biocompatibility. Its core function is to effectively separate the internal nasal cavity environment from the external atmospheric environment by contacting the inner wall of the nostril when the irrigation head is inserted into the nostril.

[0081] Among them, along the flow direction of the liquid medium, the flexible wing portion 5 is arranged downstream of the air holes 402. The purpose is to ensure that when the wing portion 5 plays its sealing role and isolates the distal end 101 of the irrigation head from the nasal cavity environment, the air holes 402 are always outside the sealed area and can continuously and unobstructedly communicate with the external atmospheric environment, rather than communicating with the nasal cavity interior where the pressure may change.

[0082] Based on this, it is ensured that the air flow space 401 can effectively balance with the atmospheric pressure through the air holes 402, and further maintain the pressure outside the flexible pipe section A203 (within the air flow space 401) stable at (or close to) the atmospheric pressure, ensuring the stable establishment and maintenance of the effective pressure difference required to drive the radial collapse of the flexible pipe section A203.

[0083] In addition, the flexible wing portion 5 forms a sealing barrier by closely conforming to the nostril contour through its elastic deformation ability, and can also effectively prevent the leakage of the irrigation fluid from the edge of the nostril during the irrigation process, ensuring that the irrigation fluid acts on the target area and helping to stabilize the position of the irrigation head in the nostril, jointly improving the effectiveness, cleanliness, and user comfort of the entire irrigation process.

[0084] In a specific embodiment, the wing portion 5 preferably presents an annular sheet structure. The annular sheet structure extends substantially radially outward from the outer wall surface of the outer tube 1, and its outer edge is used to contact and conform to the inner wall of the user's nostril. It ensures that the wing portion 5 can make a comprehensive and 360-degree circumferential contact with the nostril, thus making it easier to establish a complete and effective sealing line to prevent the leakage of the irrigation fluid.

[0085] In addition, in order to further improve the fit between the edge of the wing part 5 and the internal contour of the nasal cavity and increase the wearing comfort, the annular sheet structure has a non-uniform thickness in its radial cross-section. Preferably, its thickness gradually decreases from the root near the outer tube 1 towards its free outer edge (i.e., the outermost edge). This tapered, thinning or smoothly transitioning edge profile makes the outermost edge part of the wing part 5 particularly soft, elastic and easy to bend and deform. In this way, even if the internal shape of the nostril is not a perfect circle or there are slight irregularities, this soft thin edge can better adapt to and fit these contours, reduce local pressure points, ensure the sealing effect while minimizing the sense of foreign body and enhancing the overall comfort experience of the user.

[0086] In a specific embodiment, the outer tube 1 has a distal end 101 and a proximal end 102 respectively located at both ends of the flushing head.

[0087] The distal end 101 refers to the end that first contacts or enters the user's nasal cavity during use and is the end where the liquid medium finally flows out. To ensure the safety and comfort of use, in this embodiment, the distal end 101 of the outer tube 1 and the head 202 of the inner lining tube 2 (i.e., the final outlet part of the flushing liquid) together form a rounded corner and a smooth transition. That is, at the tip of the flushing head, the end faces or outer edges of the outer tube 1 and the inner lining tube 2 are processed without sharp edges or steps, but presented as a continuous and rounded curved surface to minimize the risk of physical irritation or scratching to the sensitive nasal mucosa when the flushing head is inserted into the nostril or operated inside the nasal cavity. At the same time, it may also help to optimize the form of the outlet water flow.

[0088] Opposite to the distal end 101 is the proximal end 102 of the outer tube 1. The proximal end 102 constitutes the interface for connecting the nasal cavity flushing head to the main body of the nasal cavity irrigator (such as a bottle body filled with flushing liquid, a manual squeezing device or an electric pump device, etc.). For the purpose of facilitating replacement or cleaning, the proximal end 102 is adapted to be detachably connected to the main body of the nasal cavity irrigator. This detachable connection structure can adopt a variety of well-known and mature technical solutions in the art, such as but not limited to: a threaded connection structure (twisting the flushing head onto the main body by rotation), a snap-fit structure (realizing quick insertion and fixation through elastic claws or grooves), or a Luer conical joint widely used in medical devices (including Luer slip joints or Luer lock joints). The choice of connection method depends on the cooperation with the main body of the irrigator, and their common purpose is to ensure the firmness, sealing and convenience of disassembly and assembly of the connection.

[0089] Reference Figure 7 As shown, this embodiment also provides an irrigator. The irrigator includes an irrigator body 6 and a nasal cavity flushing head as described in any one of the above embodiments.

[0090] Among them, the rinser body 6 can be a nasal cavity rinser in the prior art.

[0091] Moreover, the rinser provided in this embodiment has all the beneficial effects in the above-mentioned embodiment, which will not be elaborated here.

[0092] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top part", "bottom part", "inner", "outer", "inner side", "outer side", etc.

[0093] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "joined", "assembled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0094] In the description of the embodiments of the present invention, specific features, structures, materials or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0095] In the description of the embodiments of the present invention, it should be understood that "-" and "~" represent the range between two numerical values, and this range includes the endpoints. For example: "A - B" represents the range greater than or equal to A and less than or equal to B. "A ~ B" represents the range greater than or equal to A and less than or equal to B.

[0096] In the description of the embodiments of the present invention, the term "and / or" herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0097] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nasal irrigation head, characterized in that: include: An outer tube having a cavity formed along its axial direction; The inner liner tube is coaxially arranged in the cavity of the outer tube, and the inner liner tube comprises: A flow channel formed along its axial direction is used for the flow of liquid medium; a head connected to the flow channel for the liquid medium to flow out; and, A flexible pipe section A constituting a part of the flow channel; The pipe section A is configured to collapse radially when the flow rate of the liquid medium flowing through the flow channel exceeds a predetermined threshold.

2. The nasal irrigation head according to claim 1, characterized in that: The flow channel comprises: a hard pipe section B, connected to the pipe section A; Wherein, along the flow direction of the liquid medium, the pipe section B is located downstream of the pipe section A; Furthermore, the diameter of the pipe section B is greater than the diameter of the pipe section A, and the diameter of the pipe section B increases gradually along the flow direction of the liquid medium.

3. The nasal irrigation head according to claim 2, characterized in that: include: An adjusting structure is arranged between the outer tube and the inner lining tube; Wherein, the adjustment structure is configured to drive the liner tube to switch between a first operation mode and a second operation mode; Wherein, in the first operation mode, the pipe section A is allowed to collapse radially when the flow rate of the liquid medium flowing through the flow channel exceeds a predetermined threshold; Wherein, in the second operation mode, the radial collapse of the pipe segment A is suppressed.

4. The nasal irrigation head according to claim 3, characterized in that: The adjustment structure is configured to drive the outer tube to rotate relative to the inner liner tube due to an external force, and to cause the tube segment B to displace along its axial direction, so that the tube segment A is elastically stretched or elastically restored.

5. The nasal irrigation head according to claim 4, characterized in that: The adjustment structure is a thread matching structure, and the thread matching structure includes: A first thread segment formed on the inner wall surface of the outer tube; A second thread segment formed on the outer wall surface of the inner liner pipe; Wherein, the first thread segment is threadably engaged with the second thread segment.

6. The nasal irrigation head according to any one of claims 1 to 5, characterized in that: An airflow space is defined between the outer tube and the inner liner tube; The airflow space is provided with at least one air hole for communicating with the outside.

7. The nasal irrigation head according to claim 6, characterized in that: The outer tube has a flexible wing portion; Wherein, along the flow direction of the liquid medium, the wing portion is located downstream of the pore and the wing portion is configured to separate the nasal environment from the external environment.

8. The nasal irrigation head according to claim 7, characterized in that: The wing portion is an annular sheet structure, and the annular sheet structure extends radially outward from the outer wall of the outer tube; The annular sheet structure has a thickness that gradually decreases toward its free outer edge.

9. The nasal irrigation head according to any one of claims 1 to 5, characterized in that: The outer tube has: Located at the distal end of the liquid medium outflow side; and, a proximal end opposite the distal end; Wherein, the distal end and the head of the liner tube together form a rounded corner for smooth transition; The proximal end is suitable for being detachably connected to a nasal irrigator body.

10. A flushing device, characterized in that: include: Flushing device body; The nasal irrigation head according to any one of claims 1 to 9 is connected to the liquid medium pipeline of the irrigator body.

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