A sustained release device that releases a compound into the nasal passages

Abstract

The present invention belongs to the field of medical equipment technology, and relates to a sustained release device for sustained release of a compound into a nasal passage, the device comprising one connecting mechanism, two expanding mechanisms and two releasing mechanisms. Both ends of the connecting mechanism are integrally or detachably connected to two expanding mechanisms symmetrically installed in both nasal passages, respectively. The two releasing mechanisms are symmetrically installed, and each releasing mechanism is installed in each expanding mechanism correspondingly. The sustained release device is convenient to carry, can gradually release a compound into a nasal passage, and at the same time expands the nasal passage to ensure smooth breathing, and is functional, practical and comfortable.

Description

[Technical field]

[0001] The present invention belongs to the medical device technical field and relates to a sustained release device for sustained release of a compound into the nasal passages. [Background technology]

[0002] Nasal sprays are often used to treat allergic rhinitis and nasal obstruction, and the active ingredients of such drugs stimulate hormone receptors in the nose, constrict blood vessels, and relieve congestion and congestion of the nasal mucosa. When a high dose of drug directly contacts the nasal mucosa in a short time, the number of said receptors decreases rapidly, and after a while, the nasal mucosa becomes more congested and inflamed, the blood vessels become fragile, and nosebleeds become more likely. The sustained release technology can avoid the instantaneous impact of the drug on the nasal mucosa, thereby weakening or avoiding the occurrence of the above-mentioned side effects. In addition, it is widely known that essential oils are used to improve symptoms such as nausea, allergies, and insomnia, and traditional incense machines are often placed indoors, which are large in volume and inconvenient to carry, and the portable nasal sustained release device can help people use aromatic compounds such as essential oils anytime and anywhere. Although the prior art provides a variety of portable nose clips to aid in the gradual release of compounds in the nasal passages, existing nose clips tend to only release a specific type or condition of compound, lacking versatility and also having significant limitations with respect to release efficacy and breathability. Summary of the Invention [Problem to be solved by the invention]

[0003] 1. Nose clips contain volatile aromatic compounds in the material. Such nose clips are simple in structure and easy to wear, but the aromatic compounds come into direct contact with the inner walls of the nasal passages, causing irritation. In addition, such nose clips do not have the function of expanding the nasal passages, so they inhibit breathing to a certain extent.

[0004] 2. An openable cavity is installed inside the nose clip, and the compound is placed in it, and the compound is released into the nasal passage by opening the cavity. However, because the cavity is installed, such a nose clip is thick and does not have the function of expanding the nasal passage, so it inhibits breathing to a certain extent. In addition, the opening and closing mechanism of the cavity is fine and complex, and unreliable, and once it is broken, it may cause a risk of inhalation.

[0005] 3. A circular tube is placed at the end of the nose clip, and solid aromatic compounds are placed in the circular tube, and the solid compounds are fixed by the narrow part in the center of the circular tube. However, such a nose clip cannot release liquid compounds. And since the solid aromatic compounds are not hard, the fixing method is not reliable and may cause the risk of inhalation. In addition, such a nose clip does not have the function of expanding the nasal passage, so it inhibits breathing to a certain extent.

[0006] 4. One type of nose clip is provided with an expansion element for expanding the nasal passage and a release element fixed to the expansion element for releasing the compound. Although the breathability of such a nose clip is better than that of other nose clips, the expansion element has a small contact area with the inner wall of the nasal passage, and the pressure on the inner wall of the nasal passage is relatively large, which is easy to cause discomfort, and it is difficult to expand the nasal passage in all directions. In addition, the expansion element does not have elastic support spokes, so it is insufficient in terms of the strength and balance of expansion, and it is also difficult to properly expand a specific part of the nasal passage. In addition, the release element can only accommodate a small amount of a specific state and type of compound, and the opening and closing device is fine and complicated, and the reliability is insufficient.

[0007] 5. One type of nose clip has both filtering and releasing functions, and includes a pair of cylindrical containers connected to each other by a connecting band, in which a filter and an absorbent pad capable of absorbing liquid drugs are provided, and the absorbent pad can release the drug into the inhalation airflow. However, this type of nose clip cannot release solid compounds. In addition, since the inhalation gas passes through the filter and the absorbent pad, the breathing resistance is large, so it is not versatile and can only be applied to certain situations. [Means for solving the problem]

[0008] In order to solve the above-mentioned shortcomings in the prior art, the present invention provides a sustained release device for sustainedly releasing a compound into a nasal passage, the sustained release device comprising one connecting mechanism, two expanding mechanisms, and two releasing mechanisms. Both ends of the connecting mechanism are integrally or detachably connected to two expanding mechanisms symmetrically installed in both nasal passages, respectively. The two releasing mechanisms are symmetrically installed, and each releasing mechanism is installed in a corresponding expanding mechanism. The connecting mechanism includes at least one connecting beam, the connecting beam semi-encircling the lower end of the nasal septum, a middle part located below the nasal septum, and two connecting arms symmetrically located on both sides of the nasal septum. The middle part is located between the two connecting arms. The two connecting arms respectively connect two dilator mechanisms symmetrically located in the two nasal passages. The ejection mechanism includes at least one fixed tube and at least one ejection element. The fixed tube is a tubular structure and is installed on the expansion mechanism. The release element is a structure with wide ends and narrow center, and when worn, the release element is fixed in the fixed tube, the fixed tube surrounds the narrow center of the release element and tightly meshes with it, both ends of the release element are located outside both ends of the fixed tube, and the maximum width of both ends of the release element is greater than the maximum width of the cavity of the fixed tube. The release element can accommodate a certain amount of compound and gradually release the accommodated compound into the nasal passage, and at least a part of the release element is located in the nasal passage when worn.

[0009] As an improvement of the above technical solution, the expansion mechanism includes an elastic expansion arm, which is a closed annular structure and connected to the end of the connecting arm, a fixed tube is installed on the inner main surface of the elastic expansion arm, and the release element is fitted into the fixed tube.

[0010] As an improvement of the above technical solution, the two connecting arms of the connecting beam are symmetrically provided with widened parts, and the width of the surface of the connecting arm facing the nasal septum is increased at the widened parts, so that the two widened parts fit on both sides of the nasal septum and apply a clamping force to the nasal septum.

[0011] As an improvement of the above technical solution, the expansion mechanism comprises one elastic expansion arm and at least one elastic support spoke. The elastic expansion arm is a closed loop structure and is connected to one end of the connecting arm. The elastic support spoke is branched and includes multiple branches, one end of each branch is connected to the stem of the elastic support spoke and the other end is fixed to the elastic expansion arm. The fixing tube is installed on the elastic support spoke, and the ejection element is fitted into the fixing tube.

[0012] As an improvement of the above technical solution, the elastic support spokes, the fixed tube and the ejection element are arranged above the elastic expansion arm to form an inverted bowl structure.

[0013] As an improvement of the above technical solution, the expansion mechanism comprises one elastic expansion arm and at least one elastic support spoke. The elastic extension arm is a closed annular structure connected to one end of the connecting arm, and the elastic support spoke is a band-like structure connected to the elastic extension arm at both ends.

[0014] As an improvement of the above technical solution, the connection mechanism includes a first connection beam and a second connection beam arranged in parallel in a longitudinal direction, the first and second connection beams both semi-encircling the lower end of the nasal septum.

[0015] As an improvement of the above technical solution, the two second connecting arms of the second connecting beam are provided with protrusions symmetrically toward the wearer's nasal septum, which fit on both sides of the nasal septum and apply a clamping force to the nasal septum.

[0016] As an improvement of the above technical solution, plugs are provided at the ends of the two second connecting arms of the second connecting beam, and the plugs are inserted into jacks provided at the roots of the first elastic support spokes, and the plugs have a structure with wide ends and narrow center, thereby realizing plug-in fixing.

[0017] As an improvement of the above technical solution, the expansion mechanism comprises one elastic expansion arm, one nasal passage engaging element, and at least one elastic support spoke. The elastic expansion arm is an open band-like structure that can be elastically compressed and is connected to the end of one connecting arm, and the outer main surface of the elastic expansion arm can partially or completely fit against the inner wall of the nasal passage, so that the expansion force from the elastic expansion arm and the elastic support spokes can be applied to the nasal ala, and the clamping force from the connecting beam can be applied to the nasal septum. The nasal passage engaging element is a sheet-like structure, connected to the elastic expansion arms and holds the expansion mechanism in an open configuration. When worn, the nasal passage engaging element is located inside the nasal ala, and its outer main surface fits with the inner wall of the nasal ala, applying the expansion force from the elastic expansion arms and the elastic support spokes to the nasal ala. The resilient support spokes are resiliently compressible band-like or strip-like structures which are connected at either end to the resilient extension arms or nasal passage engaging elements.

[0018] In one improvement of the above technical solution, the resilient extension arms are integrated with the nasal passage engaging element.

[0019] As an improvement of the above technical solution, the cross section of the elastic expansion arm perpendicular to the axis of the nasal passage is a V-shaped structure or a C-shaped structure, and includes a bend, a proximal arm and a distal arm. One end of the bent portion is connected to a proximal arm and the other end is connected to a distal arm, and when worn, the proximal arm is close to the nasal septum, the distal arm is close to the ala of the nose, and the bent portion is close to the dorsum or base of the nose.

[0020] As an improvement of the above technical solution, the end of the elastic expansion arm that fits the inner wall of the nasal passage is curved toward the inside of the nasal passage. The end of the nasal passage engagement element is curved toward the inside of the nasal passage.

[0021] As an improvement of the above technical solution, the elastic support spoke is branched to have multiple branches, each of which has one end connected to the stem portion of the elastic support spoke and the other end fixed to the elastic expansion arm or nasal passage engaging element.

[0022] As one of the improvements of the above technical solution, the connecting beam applies a clamping force to the nasal septum, and the clamping force is applied directly to the lower end of the nasal septum by the two connecting arms of the connecting beam, or the clamping force is transmitted to the corresponding expansion mechanism by the two connecting arms of the connecting beam and then applied to the lower end of the nasal septum by the corresponding expansion mechanism.

[0023] As an improvement of the above technical solution, the average cross-sectional area of ​​the middle part of the connecting beam is larger than the average cross-sectional area of ​​the connecting arm.

[0024] As an improvement of the above technical solution, the discharge element includes a cartridge, and a barrel cap and a barrel bottom connected to both ends of the cartridge and covering both ends of the cartridge, the maximum diameter of the barrel cap is larger than the maximum diameter of the cartridge, and the maximum diameter of the barrel bottom is larger than the maximum diameter of the cartridge. The barrel is a hollow tubular structure containing a compound therein, and has at least one opening at the top and bottom of the barrel through which the compound is expelled into the nasal passages.

[0025] As an improvement of the above technical solution, an absorption block made of a porous material is installed in the cartridge.

[0026] In one improvement of the above technical solution, the release element is made of a porous material.

[0027] In one improvement of the above technical solution, the outer surface of the ejection element is provided with protrusions. Effect of the Invention

[0028] Compared with the prior art, the present invention has the following advantageous effects: 1. The expansion mechanism of the sustained release device of the present invention adopts a closed-ring structure or an open-ring structure, which improves the function and applicability of the sustained release device and also increases the diversity of its specific embodiments. 2. In addition to the nasal passage engaging element, the outer main surface of the elastic expansion arm can also fit the inner wall of the nasal passage, which increases the contact area between the expansion mechanism and the inner wall of the nasal passage, is favorable for expanding the nasal passage in all directions, and reduces the pressure of the expansion mechanism against the inner wall of the nasal passage, improving comfort. 3. The use of at least one elastic support spoke ensures strength and balance of expansion, allowing for proper expansion of specific areas of the nasal passages. 4. The release element does not contact the inner walls of the nasal passages, thereby preventing the contained compound from contacting and irritating the inner walls of the nasal passages. 5. The release element adopts a column structure and has a small cross-sectional area, so that the air resistance is small, and by lengthening the axial length of the nasal passage, its capacity can be effectively increased without increasing the air resistance. 6. The fixing method of the release element is simple and secure, preventing the risk of falling off and being inhaled. 7. By exchanging different emitting elements, it can be adapted to emit different states and types of compounds, especially non-volatile liquid compounds. 8. By interchanging different release elements or components thereof, the rate at which the compound is released can be adjusted. [Brief description of the drawings]

[0029] [Figure 1A] FIG. 1 is a side view of a human nose. [Figure 1B]FIG. 1 is a side cross-sectional view of a human nose. [Figure 1C] FIG. 1 is a plan view showing a person's nose from bottom up. [Diagram 2] FIG. 1 is a schematic structural diagram of a first preferred embodiment of a sustained release device for sustainedly releasing a compound in the nasal passage and dilating the nasal passage according to the present invention. [Diagram 3] 3 is a plan view of a first preferred embodiment of a sustained release device for sustained release of a compound within the nasal passage and for dilating the nasal passage according to the present invention shown in FIG. 2. [Figure 4] FIG. 3 is a side view of one side of a first preferred embodiment of a sustained release device for sustained release of a compound within the nasal passage and for dilating the nasal passage according to the present invention shown in FIG. 2. [Diagram 5] 3 is another side view of the first preferred embodiment of the sustained release device for sustained release of a compound within the nasal passage and for dilating the nasal passage according to the present invention shown in FIG. 2. [Figure 6] FIG. 3 is a schematic diagram showing a structure in which one elastic support spoke is installed in the first preferred embodiment of the sustained release device for sustainedly releasing a compound in the nasal passage and expanding the nasal passage according to the present invention shown in FIG. 2. [Figure 7] 3 is a side cross-sectional view of a release element in a first preferred embodiment of a sustained release device for sustained release of a compound in the nasal passage and dilating the nasal passage according to the present invention shown in FIG. 2. [Figure 8] FIG. 3 is a bottom-up plan view showing the first preferred embodiment of the sustained release device for sustainedly releasing a compound within the nasal passage and expanding the nasal passage according to the present invention shown in FIG. 2 worn on a user's nose. [Figure 9] 3 is a side view showing a first preferred embodiment of a sustained release device for sustained release of a compound in the nasal passage and dilating the nasal passage according to the present invention shown in FIG. 2 being worn on the nose of a user. [Figure 10] FIG. 2 is a schematic diagram of the structure of a second preferred embodiment of a sustained release device for sustained release of a compound in the nasal passage and dilating the nasal passage according to the present invention. [Figure 11] FIG. 11 is a plan view of a second preferred embodiment of a sustained release device for sustained release of a compound within the nasal passage and for dilating the nasal passage according to the present invention shown in FIG. [Figure 12]FIG. 11 is a structural diagram showing a structure in which branched elastic support spokes are installed in the second preferred embodiment of the sustained release device for sustainedly releasing a compound in the nasal passage and expanding the nasal passage according to the present invention shown in FIG. 10. [Figure 13] 11 is a side cross-sectional view of a release element in a second preferred embodiment of a sustained release device for sustained release of a compound within the nasal passage and dilating the nasal passage according to the present invention shown in FIG. 10. [Figure 14] FIG. 2 is a schematic diagram showing the structure of a third preferred embodiment of a sustained release device for sustainedly releasing a compound in the nasal passage and dilating the nasal passage according to the present invention. [Figure 15] FIG. 15 is a plan view of a third preferred embodiment of a sustained release device for sustained release of a compound within the nasal passage and for dilating the nasal passage according to the present invention shown in FIG. 14. [Figure 16] FIG. 15 is a side view of a third preferred embodiment of a sustained release device for sustained release of a compound within the nasal passage and for dilating the nasal passage according to the present invention shown in FIG. 14. [Figure 17A] 15 is a side cross-sectional view of a release element in a third preferred embodiment of a sustained release device for sustained release of a compound in the nasal passage and dilation of the nasal passage according to the present invention shown in FIG. 14. [Figure 17B] FIG. 15 is a side cross-sectional view of a release element in a third preferred embodiment of a sustained release device for sustainedly releasing a compound in the nasal passage and expanding the nasal passage according to the present invention, as shown in FIG. 14, in which protrusions are provided on both ends of the release element. [Figure 18A] 13 is a plan view showing an example of the positional relationship between an elastic expansion arm and a nasal passage engaging element in another embodiment of a sustained release device for sustainedly releasing a compound in the nasal passage and expanding the nasal passage according to the present invention. FIG. [Figure 18B] FIG. 11 is a plan view showing another example of the positional relationship between the elastic expansion arm and the nasal passage engaging element in another embodiment of a sustained release device for sustainedly releasing a compound in the nasal passage and expanding the nasal passage according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0031] As shown in Figures 2, 10, and 14, in the sustained release device 1 of the present invention, the other components except the connecting beam 2 are symmetrically arranged in the two nasal passages 95. Therefore, in the description of the sustained release device 1 of the present invention, the other components except the connecting beam 2 are in number and structure located in one nasal passage.

[0032] As shown in FIG. 1A, the nasal directions described in the present invention are: anterior nasal 11, posterior nasal 12, superior nasal 13, and inferior nasal 14. As shown in FIG. 1B, within the nasal passage 95, the side closer to the nasal passage axis 97 of the subject is defined as the "inner side," and the side away from the nasal passage axis 97 is defined as the "outer side."

[0033] As used herein, the term "connected" means that two tangible objects are integrally or removably joined to one another by a connector, including, but not limited to, adhesive, welding, plug-in connection, threaded connection, or snap-on connection. The term "axis" as used in the present invention means the central symmetric axis of a tube or column. For a non-standard tube or column, after approximating a standard tube or column, the axis of the standard tube or column can be used as its approximate axis. For example, FIG. 1B shows the nasal passage axis 97. As used herein, the term "cross section" means a cross section of a tube or column perpendicular to its axis. The term "compound" as used herein is not intended to be a strict chemical definition but is intended to include solid and liquid refinements, compounds and mixtures, as well as other forms or combinations of substances as applied to the present invention. The term "closed ring structure" used in the present invention refers to a plan view of a closed ring consisting of n (n is a positive integer) line segments or arcs, such as a circle, an ellipse, or a polygon. The term "open structure" in the present invention refers to a plan view of a closed ring shape with one opening, such as a C-shape, a V-shape, an L-shape, or an arc. As used herein, the term "tubular structure" refers to a cylindrical structure having an axially extending cavity therethrough, including, but not limited to, cylinders and prisms.

[0034] As shown in Figures 1A, 1B and 1C, the sustained release device 1 of the present invention is applied to a human nose 9. The nose 9 is a visually visible facial protrusion including a nasal septum 91, alar 92, dorsum 93 and base 99, and two nasal passages 95 surrounding them. The outlets of the two nasal passages 95 are two nostrils 94. The inner wall 96 of the nasal passage is formed by the inner surfaces of the above-mentioned parts surrounding the nasal passage 95. In the present invention, the nasal passage 95 is limited to the nasal vestibule included in the nose 9, and does not include the nasal cavity 98.

[0035] As shown in FIG. 2, the present invention provides a sustained release device 1 for sustainedly releasing a compound into a nasal passage 95 and expanding the nasal passage 95, the sustained release device 1 including one connection mechanism, two expansion mechanisms and two release mechanisms.

[0036] Both ends of the connection mechanism integrally or detachably connect two expansion mechanisms symmetrically installed in both nasal passages 95. The two release mechanisms are symmetrically arranged, and each release mechanism is correspondingly arranged in each expansion mechanism. The expansion mechanism is positioned to expand the nasal passages 95 and the release mechanism is positioned to receive and release a compound.

[0037] As shown in Figures 2, 4, 5 and 9, the connection mechanism includes at least one connection beam 2 semi-encircling the lower end of the nasal septum 91, and the connection beam 2 has a middle part 23 located below the nasal septum 91 and two connection arms 24 located on both sides of the nasal septum 91. Both ends of the middle part 23 are respectively connected to the two connection arms 24. The two connection arms 24 of the connection beam 2 are inserted into the two nasal passages 95 from both sides of the nasal septum 91, and the two connection arms 24 connect two expansion mechanisms symmetrically installed in the two nasal passages 95, respectively. Preferably, the connection beam 2 is a U-shaped or C-shaped structure, and the C-shaped structure makes it easier for the end of the connection arm 24 to apply a clamping force to the nasal septum 91.

[0038] Preferably, the connecting beam 2 also provides a fixing function for the sustained release device 1, and the minimum distance between the two connecting arms 24 is smaller than the width of the nasal septum 91 therebetween, thereby applying a clamping force to the nasal septum 91, the clamping force being applied directly to both sides of the nasal septum 91 by the two connecting arms 24 of the connecting beam 2, or being applied to both sides of the nasal septum 91 by the elastic expanding arms 3 after being guided to corresponding expanding mechanisms by the two connecting arms 24 of the connecting beam 2. By such a clamping force, the sustained release device 1 can be clamped and fixed to the nasal septum 91.

[0039] As shown in Figures 2, 4 and 5, preferably the average cross-sectional area of ​​the intermediate portion 23 of the connecting beam 2 is larger than the average cross-sectional area of ​​the connecting arms 24, and by making the intermediate portion 23 thicker than the connecting arms 24, the ability of the connecting beam 2 to maintain its shape is enhanced and its ability to apply a clamping force to the nasal septum 91 is improved. As shown in Figures 14, 15 and 16, in another specific example, the connection beam 2 in the connection mechanism of the sustained release device 1 includes a first connection beam 21 and a second connection beam 22, and since the first connection beam 21 is integrally connected to the expansion mechanism and is made of the same material that cannot provide sufficient clamping force to support the first connection beam 21, the second connection beam 22 is provided in a position longitudinally aligned with the first connection beam 21, and the second connection beam 22 supplements the clamping force on the nasal septum 91.

[0040] 14 and 16, in another embodiment, the two connecting arms 24 of the connecting beam 2 are provided with protrusions 242 toward the nasal septum 91, which fit on both sides of the nasal septum 91 and apply a clamping force to the nasal septum. When the protrusions 242 provide a clamping and fixing function, the ends of the two connecting arms 24 of the connecting beam 2 can be connected with the expansion mechanism at a deeper position in the nasal passage 95, which can help to position the expansion mechanism and the release mechanism at a deeper position in the nasal passage 95.

[0041] 10, in another embodiment, two connecting arms 24 are provided with widened portions 241, which allow the connecting mechanism to apply a clamping force to the nasal septum 91. In addition, the width of the surface of the connecting arm 24 facing the nasal septum 91 is enlarged at the widened portions 241, which increases the contact area between the widened portions 241 and the nasal septum 91, thereby reducing the pressure of the connecting beams 2 on the nasal septum 91 and improving comfort. When the widened portion 241 and the protrusion 242 are provided together on the connection beam 2, they can be provided together in the same location, and this location has the characteristics of both the widened portion 241 and the protrusion 242.

[0042] As shown in Figures 14, 15 and 16, in another embodiment, a plug 243 is provided at the end of each of the two connection arms 24 of the connection beam 2, and the plug 243 has a structure in which both ends are wide and the middle is narrow, and fixes the connection beam 2 to the expansion mechanism in a plug-in manner.

[0043] Specifically, as shown in FIG. 16, the plug 243 is inserted into the jack 77 provided on the elastic expansion arm 3 or the elastic support spoke 7 to realize plug-in fixing. The plug 243 has a structure with wide ends and narrow middle, and includes a cap 2431, a column 2432 and a shank 2433, the jack 77 is closely engaged with the column 2432, the maximum width of the shank 2433 is larger than the maximum width of the column 2432, and the maximum width of the cap 2431 is larger than the maximum width of the column 2432. At the same time, the maximum width of the shank 2433 is larger than the maximum width of the cavity of the jack 77, and the maximum width of the cap 2431 is larger than the maximum width of the cavity of the jack 77, so that the plug 243 will not fall out. Preferably, the column 2432 and the cavity of the jack 77 may be set in a prismatic shape to avoid the expansion mechanism from rotating around the plug 243.

[0044] As shown in FIG. 2, the two extension mechanisms are symmetrically connected to the connecting mechanism, and each extension mechanism comprises one elastic extension arm 3, one nasal passage engaging element 4 and at least one elastic support spoke 7.

[0045] As shown in Figures 2, 4, 5 and 9, the nasal passage engaging element 4 is a sheet-like structure connected to the elastic expansion arm 3, and when worn, the nasal passage engaging element 4 is located inside the nasal ala 92 and applies an expansion force to the nasal ala 92. A pair of surfaces parallel to the nasal passage axis 97 of the nasal passage engaging element 4 are its main surface and maximum surface, and the pair of main surfaces, the inner main surface 41 and the outer main surface 42, have a width larger than the width of the same side of the elastic expansion arm 3. The outer main surface 42 fits with the inner wall of the nasal ala 92 and applies the expansion force from the elastic expansion arm 3 and the elastic support spoke 7 to the nasal ala 92, and the surface of the nasal passage engaging element 4 perpendicular to the nasal passage axis 97 is a sub-surface having a width smaller than the width of the main surface to reduce breathing resistance.

[0046] As shown in Figures 2, 3, 4, 6 and 8, the elastic expansion arm 3 is an elastically compressible open band-like structure, for example, C-shaped, V-shaped, L-shaped or arc-shaped, which connects the connecting arm 24 and the nasal passage engaging element 4. A pair of surfaces of the elastic expansion arm 3 parallel to the nasal passage axis 97 are its main surface and largest surface, and the pair of main surfaces are specifically the inner main surface 34 and the outer main surface 35, and a surface of the elastic expansion arm 3 perpendicular to the nasal passage axis 97 is a minor surface, which has a width smaller than that of the main surface to reduce breathing resistance. As shown in Figure 8, the outer main surface 35 of the elastic expansion arm 3 partially or completely fits the inner wall 96 of the nasal passage so that the expansion force from the elastic expansion arm 3 and the elastic support spoke 7 can be applied to the nasal ala 92, and the clamping force from the connecting beam 2 can be applied to the nasal septum 91. Since the elastic expansion arm 3 has an open structure, it is highly adaptable to nasal passages of different shapes and dimensions, and is particularly suitable for users whose left and right nasal passages have different dimensions due to a deviated nasal septum, thereby improving the user's experience and comfort and conforming to ergonomic design.

[0047] As shown in FIG. 6 , when the width of the nasal passage engaging element 4 is equal to or less than the width of the elastic expansion arm 3, and the same main surfaces of both are smoothly connected and blended into the same plane, i.e., the inner main surface 34 and the inner main surface 41 are blended into one plane, and the outer main surface 35 and the outer main surface 42 are blended into one plane, the elastic expansion arm 3 and the nasal passage engaging element 4 are blended together, and the function of the nasal passage engaging element 4 is completely replaced by the elastic expansion arm 3, and the expansion mechanism no longer includes the nasal passage engaging element 4, but only includes the elastic expansion arm 3 and the elastic support spoke 7.

[0048] Preferably, the end of the elastic expansion arm 3 that fits the inner wall 96 of the nasal passage is curved toward the inside of the nasal passage 95, for example, as shown in Fig. 6, the ends of the proximal arm 32 and the distal arm 33 of the elastic expansion arm 3 are hooks 36 that flexibly contact the inner wall 96 of the nasal passage. The end of the nasal passage engagement element 4 is curved toward the inside of the nasal passage 95.

[0049] Preferably, as shown in FIGS. 2, 3, 4, 6 and 8, the cross section of the elastic expansion arm 3 perpendicular to the nasal passage axis 97 is a V-shaped or C-shaped structure, comprising a bend 31, a proximal arm 32 and a distal arm 33.

[0050] One end of the bent portion 31 is connected to the proximal arm 32 and the other end is connected to the distal arm 31. When worn, the proximal arm 32 is close to the nasal septum 91, the distal arm 33 is close to the nasal ala 92, and the bent portion 31 is close to the nasal dorsum 93 or the base of the nose 99, i.e., the opening of the elastic expansion arm 3 can face the nasal dorsum 93 or the base of the nose 99. The outer main surface 35 of the elastic expansion arm 3 fits against the inner wall 96 of the nasal passage, and as shown in FIG. 8, when worn, the elastic expansion arm 3 is compressed by the inner wall 96 of the nasal passage, the distal arm 33 and the proximal arm 32 approach each other, and due to the restoring force of the bent portion 31, the distal arm 33 and the nasal passage engaging element 4 apply an expansion force to the nasal ala 92, expanding the nasal passage; at the same time, the elastic expansion arm 3 and the nasal passage engaging element 4 fit closely against the inner wall 96 of the nasal passage, and the mutual acting force fixes the sustained release device 1 in the nasal passage 95.

[0051] As shown in FIG. 18A , in another embodiment, the elastic expansion arm 3 is an arc-shaped or L-shaped open strip structure with one end connected to the end of the connecting arm 24 and the other end connected to the inner main surface 41 of the nasal passage engaging element 4, the elastic expansion arm 3 is not integrated with the nasal passage engaging element 4, when worn, the outer main surface 42 of the nasal passage engaging element 4 fits the inner wall 96 of the nasal passage, but the elastic expansion arm 3 does not fit the inner wall 96 of the nasal passage, and since the area where the expansion mechanism fits the inner wall 96 of the nasal passage is small, no elastic support spokes are provided to provide multi-point support.

[0052] As shown in FIG. 18B, in another embodiment, the elastic extension arm 3 is an arc-shaped or L-shaped open strip structure, one end of which is connected to the end of the connecting arm 24 and the other end of which is connected to one minor surface of the nasal passage engaging element 4, and when worn, the outer main surface 42 of the nasal passage engaging element 4 fits the inner wall 96 of the nasal passage, but the elastic extension arm 3 does not fit with the inner wall 96 of the nasal passage, and the elastic extension arm 3 is not smoothly connected to the corresponding main surface of the nasal passage engaging element 4 and does not become one surface, so the two are not integrated.

[0053] As shown in FIG. 6, the elastic support spokes 7 are elastically compressible band-like or strip-like structures, and both ends of the elastic support spokes 7 are connected to the elastic expansion arms 3 or the nasal passage engagement element 4. When worn, the elastic support spokes 7 exert their own compressed restoring force on the elastic expansion arms 3 and / or the nasal passage engagement element 4. The elastic support spokes 7 increase the expansion force of the expansion mechanism and at the same time improve the balance of expansion. Since the elastic expansion arms 3 have an open structure and the elasticity is weaker closer to the ends, the elastic support spokes 7 can provide precise support to specific positions of the elastic expansion arms 3 and the nasal passage engagement element 4, and can maintain the balance of the expansion of the nasal passage 95 by the expansion mechanism.

[0054] As shown in Figures 2, 3 and 8, the elastic support spoke 7 is branched to include multiple branches, specifically including a first branch 73, a second branch 74, a third branch 75 and a fourth branch 76, and each branch preferably has one end connected to the stem portion of the elastic support spoke 7 and the other end fixed to the elastic expansion arm 3 or the nasal passage engagement element 4. The multiple branches give the elastic support spoke 7 stronger restoring force, further increasing the expansion strength, and at the same time, the multiple branches of the elastic support spoke 7 provide more support points, further increasing the targeting and balance of the expansion.

[0055] As shown in Figures 10 and 11, in another embodiment, the expansion mechanism includes one elastic expansion arm 3. The elastic expansion arm 3 is an annular closed ring structure, and its outer main surface 35 fits the inner wall 96 of the nasal passage. When worn, the elastic expansion arm 3 is compressed by the inner wall 96 of the nasal passage, and exerts an expansion force in all directions on the nasal passage 95 by its restoring force. At the same time, the elastic expansion arm 3 fits closely to the inner wall 96 of the nasal passage, and the sustained release device 1 is fixed in the nasal passage 95 by the mutual acting force between the two. The annular elastic expansion arm 3 expands the nasal passage in all directions and increases the contact area between the expansion mechanism and the inner wall 96 of the nasal passage, thereby reducing the pressure of the expansion mechanism against the inner wall 96 of the nasal passage and improving comfort.

[0056] As shown in Fig. 12, in another embodiment, the expansion mechanism includes an elastic expansion arm 3 and at least one elastic support spoke 7. The elastic expansion arm 3 is a ring structure, and the elastic support spoke 7 is branched to include multiple branches, such as a first branch 73, a second branch 74 and a third branch 75, one end of each branch is connected to the stem of the elastic support spoke 7 and the other end is fixed to the elastic expansion arm 3, and when installed, the elastic support spoke 7 applies a restoring force of its own compression to the elastic expansion arm 3. Preferably, the elastic support spoke 7, the fixed tube 5 and the release element 6 fixed to the elastic support spoke 7 are disposed above the elastic expansion arm 3 to form an inverted bowl structure, which facilitates the release mechanism to release the compound deeper into the airway.

[0057] 14 and 15, in another embodiment, the expansion mechanism comprises an elastic expansion arm 3 and at least one elastic support spoke 7. The elastic expansion arm 3 is a circular closed loop structure, and the elastic support spoke 7 is a band-like or strip-like structure that can be elastically compressed, and both ends thereof are connected to the elastic expansion arm 3.

[0058] As shown in FIG. 2, the two release mechanisms are arranged symmetrically, each release mechanism is correspondingly installed within each expansion mechanism, and each release mechanism includes at least one fixed tube 5 and at least one release element 6.

[0059] As shown in FIG. 2, the fixing tube 5 is a tubular structure for fixing the release element 6, and the fixing tube 5 is arranged in the opening direction of the elastic extension arm 3 and is fixed to the stem part of the elastic support spoke 7 by the first branch 73, the second branch 74, the third branch 75 and the fourth branch 76. As shown in FIG. 10 and FIG. 14, in another embodiment, the fixing tube 5 is fixed to the inside of the elastic extension arm 3 or the inside of the nasal passage engaging element 4, specifically, the fixing tube 5 shown in FIG. 10 is fixed to the inside of the annular elastic extension arm 3. As shown in FIG. 14, in another embodiment, the square prism-shaped fixing tube 5 is fixed to the second elastic support spoke 72. Preferably, the sustained release device 1 includes a plurality of fixing tubes 5 and releasing elements 6 to increase the capacity of the compound or to increase the release rate of the compound.

[0060] 2, 10 and 14, the release element 6 has a structure with both ends being wide and the middle part being narrow, and when worn, the release element 6 is fixed to the fixed tube 5, the fixed tube 5 surrounds the narrow central part of the release element 6 and tightly engages with it, both ends of the release element 6 are located outside both ends of the fixed tube 5, and its maximum width is larger than the maximum width of the cavity of the fixed tube 5, making the release element 6 unable to be detached from the fixed tube 5. The release element 6 can contain a certain amount of compound and gradually release the compound into the nasal passage 95, and at least a part of the release element 6 is located in the nasal passage 95 when worn.

[0061] The release mechanism has the following advantages: first, the fixing method is simple and reliable; second, the cross-sectional area is small, and the breathing resistance is small; third, the length in the axial direction of the nasal passage is increased as required, the capacity is increased, and the breathing resistance is not increased; fourth, by replacing different types of release elements 6, it can be applied to different compounds or provide different release rates; fifth, the compounds contained in the release elements 6 can be easily replaced; sixth, the release rate of the compounds can be adjusted by adjusting the number of openings and the size of the openings of the release elements 6.

[0062] As shown in Figure 14, Figure 17A and Figure 17B, in another embodiment, the material of the release element 6 is a porous material for absorbing and retaining liquid compounds, and the porous surface is particularly favorable for the volatilization of the compounds, and also contributes to carrying away minute droplets of the compounds by the inhalation airflow in the nasal cavity, so that the porous material can not only release volatile liquid compounds, but also release non-volatile liquid compounds in the form of minute droplets.Preferably, as shown in Figure 17B, the surfaces of both ends of the release element 6 made of a porous material are provided with protrusions 65 for further expanding the surface area and improving the release speed.

[0063] As shown in FIGS. 2, 7, 10 and 13, in another embodiment, the release element 6 includes a cartridge 61, a cylinder cap 62 and a cylinder bottom 63 that are connected to and cover both ends of the cartridge 61. The maximum width of the cylinder cap 62 and the cylinder bottom 63 is greater than the maximum width of the cartridge 61. The cartridge 61 is a hollow tubular structure for containing solid and liquid compounds therein, and the cylinder cap 62 and the cylinder bottom 63 are provided with at least one opening for discharging the compounds. Preferably, as shown in FIG. 7, the inside of the cartridge 61 is provided with an absorption block 641 made of a porous material, which is used for absorbing and retaining the liquid compounds, preventing the liquid compounds from flowing out from the opening, and can also increase the release rate of the compounds through the porous surface.

[0064] Example 1 2, 3, 4, 5, 6, 7, 8 and 9 show a first preferred embodiment of the present invention, in which a sustained release device 1 includes one connecting mechanism, two expanding mechanisms and two releasing mechanisms.

[0065] As shown in Figures 2, 4, 5 and 9, the connection mechanism includes a connection beam 2 with a U-shaped structure that semi-encloses the lower end of the nasal septum 91. As shown in Figure 2, the connection beam 2 includes a middle part 23 located below the nasal septum 91 and two connection arms 24 located on both sides of the nasal septum 91, and both ends of the middle part 23 respectively connect the two connection arms 24. When worn, the two connection arms 24 are inserted into the two nasal passages 95 from both sides of the nasal septum 91 and are integrally connected to the two elastic expansion arms 3 symmetrically arranged in the two nasal passages 95 respectively. The minimum distance between the two connection arms 24 is smaller than the width of the nasal septum 91, which applies a clamping force to the nasal septum 91 and fixes the sustained release device 1 to the nasal septum 91. The average cross-sectional area of ​​the middle part 23 is larger than the average cross-sectional area of ​​the connection arms 24, and the middle part 23 is thicker than the connection arms 24, which can improve the ability of the connection beam 2 to maintain its original shape and strengthen the clamping force.

[0066] Preferably, the two connection arms 24 of the connection beam 2 can be provided with widened portions 241 symmetrically, and the width of the surface of the connection arm 24 facing the nasal septum 91 is made larger at the widened portions 241. The two widened portions 241 fit on both sides of the nasal septum 91 and apply a clamping force to the nasal septum 91.

[0067] Preferably, the two connecting arms 24 of the connecting beam 2 may be provided symmetrically with protrusions 242 facing the wearer's nasal septum 91. The protrusions 242 fit on either side of the nasal septum 91 and apply a clamping force to the nasal septum 91. Preferably, a plug 243 can be provided at the end of each of the two connecting arms 24 of the connecting beam 2, and the plug 243 is inserted into the jack 77 provided on the elastic expansion arm 3 or the supporting spoke, and the plug 243 has a structure with wide ends and narrow center, thereby realizing plug-in fixing.

[0068] As shown in FIG. 2, the two expansion mechanisms are symmetrically connected to the connecting mechanism, and each expansion mechanism includes one elastic expansion arm 3, one nasal passage engaging element 4, and one elastic support spoke 7.

[0069] As shown in Figures 2, 4, 5 and 9, the nasal passage engaging element 4 is a sheet-like structure, located inside the wearer's nasal ala 92, the nasal passage engaging element 4 is connected to the end of the distal arm 33 of the elastic expansion arm 3, a pair of surfaces parallel to the nasal passage axis 97 are its main surface and largest surface, the pair of main surfaces are the inner main surface 41 and the outer main surface 42, the outer main surface 42 fits the inner wall of the nasal passage 92, thereby applying the expansion force from the elastic expansion arm 3 and the elastic support spoke 7 to the nasal passage 92, the width of the main surface of the nasal passage engaging element 4 is larger than the width of the main surface of the distal arm 33, thereby better distributing the expansion pressure of the expansion mechanism to the nasal passage 92 and increasing comfort. The surface of the nasal passage engaging element 4 perpendicular to the nasal passage axis 97 is a secondary surface, which has a width smaller than the width of the main surface to reduce air resistance. Preferably, the end of the nasal passage engaging element 4 can be bent inwardly into the nasal passage 95 so as not to irritate the inner wall 96 of the nasal passage.

[0070] As shown in Figures 2 and 3, the elastic extension arm 3 is connected to the connecting arm 24 and the nasal passage engaging element 4, and the cross section perpendicular to the nasal passage axis 97 is V-shaped, and the elastic extension arm 3 includes a bent portion 31, a proximal arm 32, and a distal arm 33. One end of the bent portion 31 is connected to the proximal arm 32, and the other end is connected to the distal arm 33. When worn, the proximal arm 32 is close to the nasal septum 91, the distal arm 33 is close to the nasal ala 92, the bent portion 31 is close to the nasal dorsum 93, and the opening of the elastic extension arm 3 faces the nasal base 99, as shown in Figures 1C and 8. Preferably, the proximal arm 32 of the elastic extension arm 3 is close to the nasal septum 91, the distal arm 33 is close to the nasal ala 92, the bent portion 31 is close to the nasal base 99, and the opening of the elastic extension arm 3 faces the nasal dorsum 93. A pair of surfaces of the elastic expansion arm 3 parallel to the nasal passage axis 97 are its main surface and its largest surface, the pair of main surfaces being the inner main surface 34 and the outer main surface 35, and a surface of the elastic expansion arm 3 perpendicular to the nasal passage axis 97 is its minor surface, the width of the minor surface being smaller than the width of the main surface in order to reduce air resistance. The outer main surface 35 of the elastic expansion arm 3 fits perfectly against the inner wall 96 of the nostril, so that the expansion force from the elastic expansion arm 3 and the elastic support spoke 7 can be applied to the nasal ala 92.

[0071] As shown in Fig. 8, when worn, the elastic expansion arm 3 is compressed by the inner wall 96 of the nasal passage, the distal arm 33 and the proximal arm 32 approach each other, and due to the restoring force of the bent portion 31, the distal arm 33 and the nasal passage engaging element 4 apply an expansion force to the nasal ala 92 to expand the nasal passage, and at the same time, the elastic expansion arm 3 and the nasal passage engaging element 4 fit closely with the inner wall 96 of the nasal passage, and the sustained release device 1 is fixed in the nasal passage 95 by their mutual acting force. Since the elastic expansion arm 3 has an open structure, it has strong adaptability to nasal passages of different shapes and sizes, and is particularly suitable for users with different sizes of the left and right nasal passages due to a deviated nasal septum.

[0072] As shown in Fig. 6, when the width of the nasal passage engaging element 4 is equal to or smaller than the width of the elastic expansion arm 3, and the same-side main surfaces of both are smoothly connected and blended into the same plane, i.e., the inner main surface 34 and the inner main surface 41 are blended into one plane, and the outer main surface 35 and the outer main surface 42 are blended into one plane, the elastic expansion arm 3 and the nasal passage engaging element 4 are blended together, both of which fit the inner wall 96 of the nasal passage, and the main surfaces of both are substantially in the same plane, so that it can be considered as blending. The function of the nasal passage engaging element 4 is completely replaced by the elastic expansion arm 3, in which case the expansion mechanism no longer includes the nasal passage engaging element 4, but only includes the elastic expansion arm 3 and the elastic support spoke 7.

[0073] As shown in FIG. 6, the ends of the proximal arm 32 and the distal arm 33 of the elastic expansion arm 3 are curved toward the inside of the nasal passage 95 to form a hook 36 so that the ends do not irritate the inner wall of the nasal passage.

[0074] As shown in FIG. 2, FIG. 3 and FIG. 8, the expansion mechanism has one branched elastic support spoke 7 with a first branch 73, a second branch 74, a third branch 75 and a fourth branch 76. Here, the first branch 73 is connected to the distal arm 33 of the elastic expansion arm 3, the second branch 74 and the fourth branch 76 are connected to the proximal arm 32, and the third branch 75 is connected to the nasal passage engaging element 4. When worn, the elastic support spoke 7 exerts a restoring force on the elastic expansion arm 3 and the nasal passage engaging element 4 after it is compressed. The elastic support spoke 7 has a stronger restoring force due to the multiple branches, which further enhances the expansion effect, and at the same time, the multiple branches increase the support points for the elastic expansion arm 3 and the nasal passage engaging element 4, which further enhances the adaptability and balance of the expansion.

[0075] 6 shows that the first preferred embodiment provides one elastic support spoke 7, which is an arc-shaped belt-like structure, and both ends of which are connected to different positions on the inner main surface 34 of the elastic expansion arm 3. The belt-shaped elastic support spoke 7 improves the expansion effect, strengthens the adaptability and balance of expansion, and at the same time has the characteristics of simple structure and small air resistance. Preferably, multiple belt-shaped elastic support spokes 7 can be provided according to actual needs to further enhance the expansion force and balance.

[0076] As shown in FIG. 2, the two release mechanisms are arranged symmetrically, each release mechanism is correspondingly installed within each expansion mechanism, and each release mechanism includes one fixed tube 5 and one release element 6.

[0077] 2, the fixing tube 5 is a circular tubular structure fixed to the elastic support spokes 7, and is used to surround and fix the releasing element 6. Preferably, the fixing tube 5 may be provided on the inner main surface 34 of the elastic expansion arm 3 or on the inner main surface 41 of the nasal passage engaging element 4.

[0078] As shown in Figures 2 and 7, the release element 6 has a structure that is wide at both ends and narrow in the middle, and includes a hollow cylindrical cartridge 61, a cylinder cover 62 connected to and covering both ends of the cartridge, and a cylinder bottom 63. The outer diameter of the barrel cap 62 and the barrel bottom 63 is larger than the outer diameter of the cartridge 61. When installed, the release element 6 is fixed to the fixed tube 5, which surrounds the cartridge 61 and closely engages with it. The barrel cap 62 and the barrel bottom 63 are located on the outside of both ends of the fixed tube 5, and their outer diameters are larger than the inner diameter of the fixed tube 5, so that the release element 6 does not come off from the fixed tube 5. At this time, the release element 6 is located in the nasal passage 95. The barrel cap 62 is provided with a columnar protrusion 622, and a screw 623 is provided on the outside thereof. The columnar protrusion 622 is screwed into the open end of the cartridge 61, and the screw 623 is closely engaged with the screw mouth 611 at the open end of the cartridge 61, thereby realizing a screw fit and connecting the cartridge 61 and the barrel cap 62. The barrel bottom 63 and the cartridge 61 are of an integral structure. The cartridge 61 is used to contain solid and liquid compounds, and the cartridge cap 62 is provided with a first hole 621, through which the compounds are released into the nasal passage. The contents 64 of the cartridge 61 are absorbed by an absorbent block 641 made of a porous material, which prevents the liquid compounds from flowing out of the first hole 621, and the porous surface of the block increases the release rate of the compounds. The release mechanism allows the cartridge contents 64 to be easily replaced, and the cartridge cap 62 with different opening numbers and sizes can be replaced to adjust the release rate, and the entire release element 6 can be replaced with a porous material to meet different release requirements.

[0079] Example 2. 10, 11, 12 and 13 are a second preferred embodiment of the present invention, in which a sustained release device 1 includes one connecting mechanism, two expanding mechanisms and two releasing mechanisms. 10 and 11, the connection mechanism includes one connection beam 2 having a U-shaped structure that semi-surrounds the lower end of the nasal septum 91, and the connection beam 2 includes a middle portion 23 located below the nasal septum 91 and two connection arms 24 located on both sides of the nasal septum 91. The two connection arms 24 of the connection beam 2 are inserted into two nasal passages 95 from both sides of the nasal septum 91 and are integrally connected to two annular elastic expansion arms 3 that are symmetrically arranged within the two nasal passages 95, respectively.

[0080] In addition, the connecting beam 2 provides a fixing function for the sustained release device 1, and the minimum distance between the two connecting arms 24 is smaller than the width of the nasal septum 91 at that location, and applies a clamping force to the nasal septum 91 to fix the sustained release device 1 between the nasal septum 91. The location where the connecting beam 2 applies a clamping force to the nasal septum 91 is the widened portion 241, and the surface of the connecting arm 24 facing the nasal septum 91 is wider at the widened portion 241, increasing the contact (fit) area between the widened portion 241 and the nasal septum 91, thereby reducing the pressure of the widened portion 241 on the nasal septum 91 and increasing comfort.

[0081] Preferably, the two connection arms 24 of the connection beam 2 can have symmetrically arranged protrusions 242 facing the wearer's nasal septum 91. The protrusions 242 fit on both sides of the nasal septum 91 and apply a clamping force to the nasal septum 91. The protrusions 242 can be integrated into the same position as the widened portion 241.

[0082] Preferably, a plug 243 is installed at the end of each of the two connection arms 24 of the connection beam 2, and the plug 243 is inserted into a jack 77 installed on the elastic expansion arm 3. The plug 243 has a structure with wide ends and narrow center, thereby realizing plug-in type fixing. 10 and 11, each of the expansion mechanisms includes an annular elastic expansion arm 3, and the pair of surfaces of the annular elastic expansion arm 3 parallel to the nasal passage axis 97 are the main surface and the largest surface, the pair of main surfaces are the inner main surface 34 and the outer main surface 35, and the surface of the elastic expansion arm 3 perpendicular to the nasal passage axis 97 is the sub-surface, and the width of the sub-surface is smaller than the width of the main surface, thereby reducing the respiratory resistance. When worn, the annular elastic expansion arm 3 is inserted into the nasal passage 95 and compressed by the inner wall 96 of the nasal passage, and its restoring force exerts an expansion force on the inner wall 96 of the nasal passage, and at the same time, the elastic expansion arm 3 fits closely to the inner wall 96 of the nasal passage, and the sustained release device 1 is fixed in the nasal passage 95 by the mutual force between the two. The annular elastic expansion arm 3 expands the nasal passage in all directions and increases the contact area between the elastic expansion arm 3 and the inner wall 96 of the nasal passage, thereby reducing the pressure of the expansion mechanism against the inner wall of the nasal passage, thereby improving comfort.

[0083] 12 shows a second preferred embodiment, which includes an elastic support spoke 7 including a first branch 73, a second branch 74 and a third branch 75, and these three branches are respectively elastically compressed arc-shaped strip structures, the ends of which are all connected to the upper surface of the elastic extension arm 3, which applies the restoring force of the elastic support spoke 7 after compression to the elastic extension arm 3, and these branches help to further increase the strength of expansion and the adaptability and balance of expansion. In addition, the elastic support spoke 7, the fixed tube 5 and the releasing element 6 are all arranged above the elastic extension arm 3, which allows the releasing element 6 to enter deeper into the nasal passage 95, facilitating the release of the compound to the deeper parts of the airway.

[0084] As shown in Figures 10 and 11, the two release mechanisms are arranged symmetrically, each release mechanism is correspondingly arranged within each expansion mechanism, and each release mechanism includes one fixed tube 5 and one release element 6.

[0085] As shown in Figures 10 and 11, the fixing tube 5 is a circular tubular structure fixed to the inner main surface 34 of the annular elastic expansion arm 3, for surrounding and fixing the emitting element 6. Preferably, as shown in Figure 12, the fixing tube 5 is provided on the elastic support spoke 7.

[0086] 10, 11 and 13, the ejection element 6 has a structure in which both ends are wide and the center is narrow, and includes a tubular cartridge 61, a barrel cap 62 and a barrel bottom 63 that are connected to both ends of the cartridge. The outer diameters of the barrel cap 62 and the barrel bottom 63 are both larger than the outer diameter of the cartridge 61. When the ejection element 6 is attached, it is fixed to the fixed tube 5, which surrounds the cartridge 61 and closely engages with it. The barrel cap 62 and the barrel bottom 63 are located outside both ends of the fixed tube 5, and their outer diameters are larger than the inner diameter of the fixed tube 5, so that the ejection element 6 cannot be detached from the fixed tube 5. At this time, the ejection element 6 is located in the nasal passage 95. The cylinder cap 62 is provided with a columnar protrusion 622, and a plurality of hemispherical protrusions 624 are provided on the outside thereof. The columnar protrusion 622 is inserted into the open end of the medicine barrel 61, and the hemispherical protrusions 624 are closely engaged with a plurality of locking holes 612 provided at the open end of the medicine barrel 61, thereby connecting the medicine barrel 61 and the cylinder cap 62. The cylinder bottom 63 and the medicine barrel 61 are of an integral structure. The contents 64 of the medicine barrel 61 are a volatilizable solid compound 642, and the cylinder cap 62 is provided with five first holes 621 and the cylinder bottom 63 is provided with one second hole 631, which forms a penetrating airflow in the cavity of the medicine barrel 61, causing the solid compound 642 to volatilize and be released into the nasal passage 95. The release mechanism allows convenient replacement of the cartridge contents 64, replacement of the barrel cap 62 with a different aperture number to adjust the release rate, and replacement of the entire release element 6 with a porous material to accommodate different release requirements.

[0087] Example 3. 14, 15, 16, 17A and 17B show a third preferred embodiment of the present invention, in which a sustained release device 1 includes one connecting mechanism, two expanding mechanisms and two releasing mechanisms.

[0088] As shown in Figures 14, 15 and 16, the connection mechanism includes two connection beams 2, specifically, a first connection beam 21 and a second connection beam 22 arranged vertically side by side, and the first connection beam 21 and the second connection beam 22 both semi-surround the lower end of the nasal septum 91, and the first connection beam 21 consists of a first intermediate portion 213 located below the nasal septum 91 and two first connection arms 214 located on both sides of the nasal septum 91, and the two first connection arms 214 are inserted into the two nasal passages 95 from both sides of the nasal septum 91 and are respectively integrally connected to the expansion mechanisms arranged symmetrically in the two nasal passages 95. The second connecting beam 22 consists of a second intermediate portion 223 located below the nasal septum 91 and two second connecting arms 224 located on both sides of the nasal septum 91, and these two second connecting arms 224 are inserted into the two nasal passages 95 from both sides of the nasal septum 91 and are each removably connected in a plug-in manner to expansion mechanisms symmetrically arranged within the two nasal passages 95.

[0089] As shown in Figures 14, 15 and 16, the first connecting beam 21 is integral with the extension mechanism, and the material of the first connecting beam 21 does not provide sufficient clamping force, so the extension mechanism is provided with a second connecting support 22 to supplement the clamping force. The second connecting beam 22 applies a clamping force to the nasal septum 91 through two parts. The first part is a plug 243 installed at the end of the two second connecting arms 224, which transmits the clamping force to the annular elastic extension arm 3 through the first elastic support spoke 71, and applies the clamping force to the nasal septum 91 from the outer main surface 35 of the elastic extension arm 3 close to the nasal septum 91. The second part is two protrusions 242 toward the nasal septum 91 installed at the center of the two second connecting arms 224, which fit on both sides of the nasal septum 91 and apply a clamping force to the nasal septum 91. Preferably, the two first connecting arms 214 of the first connecting beam 21 can be provided with protrusions 242 with the same function.

[0090] As shown in FIG. 16, the ends of the two second connecting arms 224 of the second connecting beam 22 are provided with plugs 243, which are inserted into the jacks 77 provided at the bases of the first elastic support spokes 71 to realize plug-in fixing. The plugs 243 are wide at both ends and narrow in the middle, and include a cap 2431, a column 2432 and a shank 2433. The maximum widths of the cap 2431 and the shank 2433 are both greater than the maximum width of the column 2432. After installation, the jack 77 is surrounded by the column 2432 and tightly interlocks with it, and the cap 2431 and the shank 2433 are respectively located outside both ends of the jack 77, and the maximum widths of both are greater than the maximum width of the cavity of the jack 77, so that the plugs 243 cannot be pulled out. Preferably, the column 2432 and the cavity of the jack 77 are square column structures, and they are tightly interlocked to prevent the expansion mechanism from rotating around the plug 243. Preferably, the ends of the two first connecting arms 214 of the first connecting beam 21 are provided with the same plug 243, which can be plug-connected to the elastic expansion arms 3 or the elastic support spokes 7.

[0091] Preferably, the two first connecting arms 214 of the first connecting beam 21 can be symmetrically provided with widened portions 241, and the width of the surface of the first connecting arms 214 facing the nasal septum 91 increases at the widened portions 241, and the two widened portions 241 fit on both sides of the nasal septum 91 and apply a clamping force to the nasal septum 91. Preferably, the two second connecting arms 224 of the second connecting beam 22 can be symmetrically provided with widened portions 241, and the width of the surface of the second connecting arms 224 facing the nasal septum 91 increases at the widened portions 241, and the two widened portions 241 fit on both sides of the nasal septum 91 and apply a clamping force to the nasal septum 91. The widened portions 241 can be integrated at the same position as the protrusions 242.

[0092] As shown in FIG. 14, each expansion mechanism comprises one elastic expansion arm 3 and two elastic support spokes 7 . As shown in Figures 14 and 15, the elastic expansion arm 3 is a ring structure connected to the end of the connection arm 24, a pair of surfaces of the elastic expansion arm 3 parallel to the nasal passage axis 97 are its main surface and largest surface, the pair of main surfaces are the inner main surface 34 and the outer main surface 35, the surface of the elastic expansion arm 3 perpendicular to the nasal passage axis 97 is the minor surface, the width of the minor surface is smaller than the width of the main surface, thereby reducing the respiratory resistance. The outer main surface 35 fits to the inner wall 96 of the nasal passage so that the expansion force from the elastic expansion arm 3 and the elastic support spoke 7 can be applied to the nasal passage 95, and the clamping force from the second connection beam 22 can be applied to the nasal septum 91. When worn, the elastic expansion arm 3 is compressed by the inner wall 96 of the nasal passage, and its restoring force applies an omnidirectional expansion force to the nasal passage 95, and at the same time, the elastic expansion arm 3 fits closely to the inner wall 96 of the nasal passage, and the interaction force between the two fixes the sustained release device 1 in the nasal passage 95. The annular elastic expansion arm 3 can expand the nasal passage in all directions, and increases the contact area between the two, reducing the pressure of the expansion mechanism against the inner wall of the nasal passage, improving comfort.

[0093] As shown in Figures 14 and 15, the two elastic support spokes 7 are a first elastic support spoke 71 and a second elastic support spoke 72, each of which has a belt-like structure and is spaced apart in the elastic extension arm 3. That is, one end of the first elastic support spoke 71 and the second elastic support spoke 72 is connected to the inner main surface 34 of the elastic extension arm 3 close to the nasal septum 91, and the other end is connected to the inner main surface 34 of the elastic extension arm 3 close to the nasal ala 92, thereby ensuring the proper application of their repulsive force to the nasal ala 92. As shown in Figures 14 and 15, the two release mechanisms are arranged symmetrically, each release mechanism is correspondingly arranged within each expansion mechanism, and each release mechanism includes one fixed tube 5 and one release element 6.

[0094] 14, the cavity of the fixed tube 5 is a rectangular prism structure, and is fixed to the second elastic support spoke 72, and the fixed tube 5 surrounds and fixes the release element 6. Preferably, the fixed tube 5 may be disposed on the support spoke 71 or the inner main surface 34 of the elastic expansion arm 3.

[0095] 14 and 17A, the releasing element 6 has a structure in which both ends are wide and the center is narrow, both ends and the center are rectangular prism-shaped, when the releasing element 6 is fixed to the fixed tube 5, the fixed tube 5 surrounds the center of the releasing element 6 and fits closely therewith, the rectangular prism structure of the center of the releasing element 6 and the cavity of the fixed tube prevents the releasing element 6 from rotating, both ends of the releasing element 6 are located outside both ends of the fixed tube 5, and the releasing element 6, whose maximum width is greater than the maximum width of the cavity of the fixed tube 5, cannot be removed from the fixed tube 5. When the releasing element 6 is installed, it is located within the nasal passage 95.

[0096] The release element 6 is a porous material capable of absorbing and retaining liquid compounds, and its wide ends and porous surface promote the volatilization of the compounds and also contribute to the carrying away of tiny droplets of the compounds by the inhalation airflow in the nasal cavity, so that in particular non-volatile liquid compounds can be released in the form of tiny droplets. For optimization purposes, as shown in FIG. 17B, both ends of the porous release element 6 are provided with protrusions 65 which further increase its surface area and thus increase the release rate of the compound.

[0100] As will be explained at the end, the above embodiments are for illustrating the technical solution of the present invention, but are not intended to be limiting. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art will understand that any modifications or equivalent replacements made to the technical solution of the present invention will not depart from the spirit and scope of the technical solution of the present invention, and all of them should be included in the scope of the claims of the present invention. [Explanation of symbols]

[0101] 1. Slow release device 2. Connecting beam 3. Elastic extension arm 4. Nasal passage engaging element 5. Fixed tube 6. Emission element 7. Elastic support spokes 11. Front of nose 12. Back of nose 13. Above the nose 14. Below the nose 21. First connecting beam 22. Second connecting beam 23. Middle section 24. Articulating arm 31. Flexion 32. Proximal arm 33. Distal arm 34. Inner main surface 35. Outer main surface 36. Hook 41. Inner major surface 42. Outer major surface 61. Medicine cylinder 62. Cylinder lid 63.Bottom 64.Contents 65. Protrusion 71. First elastic support spoke 72. Second elastic support spoke 73. First branch 74. Second branch 75. Third Branch 76. Fourth Branch 77. Jack 91. Nasal septum 92. Nasal wings 93. Nasal dorsum 94. Nostrils 95. Nasal passage 96. Inner wall of nasal passage 97. Nasal meatus axis 98, nasal cavity 99.Bottom of the nose 213. First intermediate portion; 214. First connecting arm; 223. Second intermediate portion; 224. Second connecting arm; 241. Widening section 242. Protrusion 243. Plug 611. Screw hole 612. Locking hole 621. First hole 622. Columnar protrusion 623. Screw 624. Hemispherical protrusion 631. Second hole 641. Absorption block 642.Solid compounds 2431. Cap 2432. Column 2433. Shank

Claims

1. A sustained release device that is worn in a user's nose to sustainably release a compound into the nasal passages, comprising: The device includes one connecting mechanism, two expanding mechanisms, and two releasing mechanisms, and both ends of the connecting mechanism are integrally or detachably connected to the two expanding mechanisms symmetrically installed in the two nasal passages, respectively, and the two releasing mechanisms are symmetrically installed, and each releasing mechanism is installed in a corresponding expanding mechanism; The expansion mechanism expands the nasal passage and secures the sustained release device within the nasal passage; the release mechanism is disposed on the expansion mechanism and releases a compound; The ejection mechanism comprises at least one fixed tube and at least one ejection element; the fixed tube is a tubular structure and is attached to the expansion mechanism, and the release element is fixed within the fixed tube when the sustained release device is attached to the user's nose; the emission element has a structure in which both ends are wide and a central portion is narrow, the fixed tube surrounds the narrow central portion of the emission element, and both ends of the emission element have a maximum width greater than a maximum width of a cavity of the fixed tube and are located outside both ends of the fixed tube; the release element is capable of containing a quantity of a compound and gradually releasing the compound in the nasal passage, and at least a portion of the release element is located in the nasal passage when the sustained release device is worn in the nose of a user; A sustained release device characterized by:

2. The connection mechanism includes at least one connection beam, the connection beam semi-encircling a lower end of the nasal passage wall, 2. The sustained release device according to claim 1.

3. 10. The sustained release device of claim 1, wherein the expansion mechanism comprises a resilient expansion arm that expands the nasal passages.

4. 4. The sustained release device of claim 3, wherein the expansion mechanism comprises a nasal passage engaging element connected to a resilient expansion arm to distribute the expansion pressure of the expansion mechanism against the inner wall of the nasal passage.

5. 5. The sustained release device according to claim 3 or 4, wherein the expansion mechanism comprises elastic support spokes that increase the expansion force of the expansion mechanism.

6. 3. The sustained release device of claim 2, wherein the connecting beam exerts a clamping force on the nasal passage wall.

7. The sustained release device according to claim 1, wherein the axis of the fixed tube is approximately parallel to the axis of the nasal passage.

8. The discharge element includes a cartridge, a cartridge cap and a cartridge bottom connected to both ends of the cartridge and covering both ends of the cartridge, The cartridge is a hollow tubular structure containing a compound therein, and the cartridge cap and the cartridge bottom are provided with at least one opening for discharging the compound toward the nasal passage.

2. The sustained release device according to claim 1.

9. 10. The sustained release device of claim 1, wherein the release element is made from a porous material.

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