Nozzle fixing mechanism

Abstract

The utility model discloses a nozzle fixing mechanism which comprises a matching piece, a pressing and fixing piece and an elastic piece. A protrusion is arranged on the outer edge of the matching piece, and a slope inclining downwards is arranged on the inner side of the protrusion. The pressing and fixing piece is arranged on the protrusion, and a nozzle space is defined by the pressing and fixing piece and the matching piece. The elastic piece is arranged in the nozzle space, the bottom of the elastic piece is in interference fit with the inclined face and is sealed, and the elastic piece is used for fixedly holding the nozzle. According to the nozzle fixing and holding mechanism, the protrusion is moved outwards to the edge position, the inclined face is matched with the elastic piece in an interference mode, sealing performance is guaranteed, meanwhile, damage to assembly of the nozzle is avoided, and the product yield is increased. The inclined plane can prevent the bottom of the elastic piece from turning outwards to cause reduction or failure of the sealing performance, and the sealing reliability is further improved. The outward-moving protrusions can play a role in pre-positioning, and follow-up assembly is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a nozzle holding mechanism. Background Art

[0002] In the existing nozzle structure, the elastic member for fixing the nozzle (the nozzle) generally contacts with the matching member to form a chamber for accommodating the medium, and the tightness of this chamber directly affects the atomization effect of the nozzle.

[0003] To avoid the destruction of the high-pressure environment in the chamber caused by the leakage of the medium, a common method is to enhance the sealing performance by setting an interference structure. For example, in the Chinese patent with the publication number CN 220917888 U, a protrusion is provided in the middle of the matching member, and the protrusion is in interference fit with the lower end of the elastic member to improve the tightness of the chamber. However, this also causes a new problem. Since the lower end of the elastic member is close to the nozzle, and the nozzle is a vulnerable part, during the assembly process, the nozzle often collides with the protrusion and is damaged, resulting in poor product performance and affecting the use performance. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a nozzle holding mechanism, which improves the sealing structure of the chamber, avoids damage to the nozzle during assembly while ensuring tightness, and improves the product yield.

[0005] The purpose of the utility model is realized by the following technical scheme: a nozzle holding mechanism, including a matching member, a pressing member and an elastic member;

[0006] A protrusion is provided on the outer edge of the matching member, and an inclined surface is provided on the inner side of the protrusion and slopes downward; the pressing member is arranged on the protrusion and encloses a nozzle space with the matching member; the elastic member is arranged in the nozzle space, and the bottom of the elastic member is in interference fit and sealed with the inclined surface, and the elastic member is used to hold the nozzle.

[0007] The above nozzle holding mechanism moves the protrusion to the edge position and uses the inclined surface to be in interference fit with the elastic member, thereby avoiding damage to the nozzle during assembly and improving the product yield. Moreover, the inclined surface can also prevent the bottom of the elastic member from turning outwards, resulting in a decrease or failure of the sealing performance, further improving the reliability of the seal, and the outwardly moved protrusion can play a role of pre-positioning, facilitating subsequent assembly.

[0008] In some embodiments, the included angle between the inclined surface and the horizontal plane is 5° - 45°.

[0009] In the above scheme, the inclined surface within this included angle range can better limit the outward turning of the bottom of the elastic member, and at the same time increase the interference amount between the two, achieving a better sealing effect.

[0010] In some embodiments, the interference amount between the bottom of the elastic member and the inclined surface is 0.05 mm - 0.5 mm.

[0011] In the above solution, within this interference amount range, the bottom of the elastic member can be fully compacted with the inclined surface, ensuring the effectiveness and reliability of the seal.

[0012] In some embodiments, the protrusion has an inclined inner side surface, and the angle between the inner side surface and the vertical surface is 0° - 3°.

[0013] In the above solution, within this angle range, after the pressing member is inserted into the fitting, the inner side surface of the protrusion can closely adhere to the outer side surface of the concave corner, thereby temporarily fixing the pressing member.

[0014] In some embodiments, a concave corner is provided on the outer periphery of the bottom of the pressing member;

[0015] When the concave corner is provided on the protrusion, the position of the pressing member is defined by the matching member, and at the same time, there is a spacing between the lower end of the nozzle and the inner bottom of the nozzle space.

[0016] In the above solution, through the cooperation of the concave corner and the protrusion, the pressing member can be pre - defined at the top position of the matching member, facilitating subsequent assembly. In addition, the reserved spacing design can prevent the bottom of the nozzle from being squeezed and damaged during assembly. On the other hand, this spacing can also serve as a buffer mechanism for each pressurizing medium, avoiding damage to the micro - structure inside the nozzle caused by instantaneous high pressure.

[0017] In some embodiments, the pressing member is fixedly welded to the matching member; or, fasteners for fastening the pressing member to the matching member are provided on the pressing member.

[0018] In some embodiments, a channel communicating with the nozzle space is provided inside the matching member, and a pre - filter is provided in the channel.

[0019] In the above solution, the pre - filter is used to intercept large - particle impurities contained in the cut - off, preventing blockage of the nozzle, thereby ensuring the normal operation of the atomization function.

[0020] In some embodiments, the nozzle holding mechanism further includes a guiding member, and a groove is provided at the distal end of the guiding member;

[0021] The matching member is disposed in the groove, and a sealing ring is provided between the matching member and the groove.

[0022] In some embodiments, a plane is provided between the protrusion and the inclined surface, and a step is formed at the connection of the plane and the inclined surface to limit the outward turning of the bottom of the elastic member.

[0023] In the above solution, the step can further restrict the outward turning of the bottom of the elastic member, improve the interference fit effect between the bottom of the elastic member and the inclined surface, and at the same time, the step can also form a new seal with the bottom of the elastic member, further enhancing the tightness of the nozzle space.

[0024] In some embodiments, the bottom of the elastic member has an arc-shaped convex hull, and the convex hull can form a surface seal and a line seal with the inclined surface and the step respectively.

[0025] In the above solution, a surface seal and a line seal are formed through the inclined surface and the step, and the two cooperate with each other, which can effectively improve the sealing performance between the elastic member and the mating member.

[0026] The present utility model also provides a nozzle structure, including the above-mentioned nozzle holding mechanism.

[0027] Compared with the prior art, the beneficial effects of the present utility model at least include:

[0028] 1. By moving the protrusion to the edge position and using the inclined surface to interfere with the elastic member, the nozzle holding mechanism avoids damage to the nozzle during assembly while ensuring tightness, and improves the product yield.

[0029] 2. The inclined surface can prevent the sealing performance from decreasing or failing due to the outward turning of the bottom of the elastic member, and further improve the reliability of the seal.

[0030] 3. The outwardly moved protrusion can play a role in pre-positioning, facilitating subsequent assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of a nozzle holding mechanism of the present utility model.

[0032] Figure 2 is Figure 2 a partial structural decomposition diagram of

[0033] Figure 3 is another schematic structural diagram of a nozzle holding mechanism of the present utility model.

[0034] Figure 4 is Figure 3 a partial structural decomposition diagram of

[0035] Figure 5 is a three-dimensional schematic diagram of a nozzle structure of the present utility model.

[0036] In the figure: 1. Mating member; 11. Protrusion; 12. Inclined surface; 13. Channel; 14. Plane; 15. Step; 2. Pressing member; 21. Concave angle; 3. Elastic member; 31. Convex hull; 4. Nozzle; 5. Fastener; 6. Prefilter; 7. Flow guiding member; 71. Groove; 8. Sealing ring. Detailed Implementation Modes

[0037] Example implementation modes will now be described more fully with reference to the accompanying drawings. However, the example implementation modes can be implemented in various forms and should not be construed as limited to the implementation modes set forth herein; rather, these implementation modes are provided so that this utility model will be more complete and comprehensive, and the concept of the example implementation modes will be fully conveyed to those skilled in the art. Identical reference numerals in the figures denote identical or similar structures, and thus their repeated description will be omitted.

[0038] In this utility model, the words describing positions and directions are illustrated by taking the accompanying drawings as examples, but can be changed according to needs, and all such changes are included within the protection scope of this utility model.

[0039] This utility model discloses a nozzle holding mechanism, which can be installed in a flow guiding member 7 to form a nozzle structure as shown in Figure 5 . The nozzle structure shown in this application is mainly used for atomization therapy. For example, after the medicament is atomized through the nozzle structure, it is delivered to the deep part of the respiratory tract, thereby improving the absorption efficiency of the drug and reducing the degradation of the drug in the digestive system, so as to achieve a better therapeutic effect. In addition, the nozzle structure can also be used in other fields such as makeup, humidification, dust removal, etc., which are not limited herein.

[0040] Referring to Figures 1 to 4 as shown, the nozzle holding mechanism includes a matching member 1, a pressing member 2, and an elastic member 3. Among them, the matching member 1, the elastic member 3, and the pressing member 2 are arranged in sequence from bottom to top, and the elastic member 3 is arranged in the nozzle space surrounded by the pressing member 2 and the matching member 1, and serves to seal the nozzle space and hold the nozzle 4.

[0041] Specifically, the matching member 1 is configured to have a shape adapted to the flow guiding member 7. For example, the matching member 1 can be a circular structure, so as to be conveniently installed in the distal groove 71 of the flow guiding member 7. As shown in Figure 2 or Figure 4 as shown, a protrusion 11 is provided on the outer edge of the matching member 1. The protrusion 11 can be integrally formed with the matching member 1 and continuously extends circumferentially.

[0042] In this application, the protrusion 11 is used to cooperate with the pressing member 2 to play a role of pre-positioning during assembly. As an example, in Figure 1 or Figure 3 , a concave corner 21 is provided on the outer periphery of the bottom of the pressing member 2. When the concave corner 21 is disposed on the protrusion 11, the inner top of the concave corner 21 abuts against the upper end of the protrusion 11, and the outer side surface of the concave corner 21 abuts against the inner side surface of the protrusion 11. This enables the pressing member 2 to be pre-defined at the top position of the matching member 1, thereby facilitating subsequent assembly. Moreover, through the cooperation of the concave corner 21 and the protrusion 11, the pressing member 2 and the matching member 1 jointly enclose a nozzle space for accommodating the medium.

[0043] In addition, an inclined surface 12 that slopes downward is provided inside the protrusion 11. This inclined surface 12 is used for interference fit with the elastic member 3 to ensure the tightness of the nozzle space. As an example, in Figure 1 or Figure 3 , the elastic member 3 is arranged inside the nozzle space. The outer periphery of the elastic member 3 is fixed by the pressing member 2, and the bottom can interfere with and seal the inclined surface 12, so that the nozzle space can meet the high-pressure environment required for the operation of the nozzle 4, ensuring that the nozzle 4 installed inside the elastic member 3 can operate normally. Moreover, since the inclined surface 12 on the matching member 1 slopes from outside to inside, this design can, on the one hand, prevent the nozzle 4 from being damaged by collision during assembly, and on the other hand, limit the decrease or failure of the sealing performance caused by the bottom of the elastic member 3 turning outwards, thereby further improving the reliability of the seal.

[0044] In summary, by moving the protrusion 11 outwards to the edge position and using the inclined surface 12 for interference fit with the elastic member 3, this nozzle holding mechanism avoids damage to the nozzle during assembly and improves the product yield. Moreover, the inclined surface 12 can also prevent the decrease or failure of the sealing performance caused by the bottom of the elastic member 3 turning outwards, further improving the reliability of the seal, and the outwardly moved protrusion 11 can play a role in pre-positioning, facilitating subsequent assembly.

[0045] See Figure 2 and Figure 4 As shown, in some embodiments, the angle between the inclined surface 12 and the horizontal plane 14 is 5° - 45°. Within this range, the inclined surface 12 can preferably limit the bottom of the elastic member 3 from turning outwards, while increasing the interference effect between the two, achieving a better sealing effect. Preferably, the angle between the inclined surface 12 and the horizontal plane 14 is 10° - 30°, for example, the angle can be 20°, 22°, 24°, 30°, etc.

[0046] In some embodiments, the interference amount between the bottom of the elastic member 3 and the inclined surface 12 is 0.05 mm - 0.5 mm. Within this range, the bottom of the elastic member 3 can be fully compacted with the inclined surface 12, ensuring the effectiveness and reliability of the seal. Preferably, the interference amount between the bottom of the elastic member 3 and the inclined surface 12 is 0.1 mm - 0.4 mm, for example, the interference amount can be 0.2 mm, 0.3 mm, 0.4 mm, etc.

[0047] In some embodiments, the protrusion 11 has an inclined inner side surface 111, and the angle between the inner side surface 111 and the vertical surface is 0° - 3°. This enables the inner side surface 111 of the protrusion 11 to closely adhere to the outer side surface of the concave corner 21 after the pressing member 2 is inserted into the fitting member, thereby temporarily fixing the pressing member 2. Preferably, the angle between the inner side surface 111 and the vertical surface is 1° - 3°, for example, it can be 2° or 3°, etc.

[0048] See Figure 1 andFigure 3 As shown, in some embodiments, when the concave angle 21 is provided on the convex 11, there is a spacing between the lower end of the nozzle 4 and the inner bottom of the nozzle space. By reserving a certain spacing, the bottom of the nozzle 4 can be avoided from being squeezed and damaged during assembly. On the other hand, this spacing can also serve as a buffer mechanism for the pressurizing medium each time, avoiding damage to the microstructure inside the nozzle 4 caused by instantaneous high pressure.

[0049] In some embodiments, the pressing member 2 and the mating member 1 are fixed by welding (not shown). For example, the gap at the outer periphery where the pressing member 2 contacts the mating member 1 is connected by full welding to further improve the tightness of the nozzle space. Or, as Figure 1 Or Figure 3 As shown, a fastener 5 for fastening the pressing member 2 to the mating member 1 is provided on the pressing member 2. Exemplarily, the fastener 5 can be a threaded sleeve. The fastener 5 can be locked with the distal end of the diversion member 7 in a threaded connection manner to fasten the pressing member 2, and by adjusting the fastener 5, the interference tightness between the elastic member 3 and the inclined surface 12 can be adjusted to ensure the best sealing effect.

[0050] In some embodiments, a channel 13 communicating with the nozzle space is provided in the mating member 1. The channel 13 is coaxially arranged with the diversion member 7 and is used to input the internal medium into the nozzle space, and the medium is atomized and released through the nozzle 4 under a high-pressure environment. And a pre-filter 6 is provided in the channel 13, and the filtration particle size range is less than or equal to 0.1 mm, which is used to intercept large particle impurities contained in the cut-off to prevent blockage of the nozzle 4, thereby ensuring the normal operation of the atomization function.

[0051] Furthermore, a sealing ring 8 is provided between the mating member 1 and the groove 71. The sealing ring 8 can be an O-ring to improve the tightness between the two and avoid the leakage of the medium from affecting the pre-filtering effect and the high-pressure environment inside the nozzle space.

[0052] See Figure 3 And Figure 4 As shown, in some embodiments, a flat surface 14 is provided between the convex 11 and the inclined surface 12. The flat surface 14 and the inclined surface 12 form a step 15 at the connection. Compared with the single inclined surface 12 limiting mechanism, the protruding step 15 can further limit the bottom of the elastic member 3 from turning outwards, improve the interference fit effect between the bottom of the elastic member 3 and the inclined surface 12, and at the same time, the step 15 can also form a new seal with the bottom of the elastic member 3 to further enhance the tightness of the nozzle space.

[0053] Preferably, the bottom of the elastic member 3 has an arc-shaped convex bulge 31. The convex bulge 31 can form a surface seal and a line seal with the inclined surface 12 and the step 15 respectively. Among them, the surface seal is the main seal and the line seal is the secondary seal. The two cooperate with each other to effectively improve the tightness between the elastic member 3 and the mating member 1.

[0054] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Without departing from the principle and purpose of the present invention, those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A nozzle holding mechanism, characterized in that: include: A matching piece (1), wherein a protrusion (11) is provided on an outer edge of the matching piece (1), and a downwardly inclined inclined surface (12) is provided on an inner side of the protrusion (11); A pressing piece (2), the pressing piece (2) being arranged on the protrusion (11) and enclosing a nozzle space with the matching piece (1); An elastic member (3), the elastic member (3) being arranged in the nozzle space, the bottom of the elastic member (3) being interference-fitted with the inclined surface (12) and sealed, and the elastic member (3) being used to hold the nozzle (4).

2. The nozzle holding mechanism according to claim 1, characterized in that: The angle between the inclined surface (12) and the horizontal plane is 5°-45°.

3. The nozzle holding mechanism according to claim 1, characterized in that: The interference between the bottom of the elastic member (3) and the inclined surface (12) is 0.05 mm-0.5 mm.

4. The nozzle holding mechanism according to claim 1, characterized in that: The protrusion (11) has an inclined inner side surface (111), and the angle between the inner side surface (111) and the vertical surface is 0°-3°.

5. The nozzle holding mechanism according to claim 1, characterized in that: A concave corner (21) is provided on the outer periphery of the bottom of the pressing piece (2); When the concave corner (21) is arranged on the protrusion (11), the position of the pressing member (2) is limited by the matching member (1), and a distance is provided between the lower end of the nozzle (4) and the inner bottom of the nozzle space.

6. The nozzle holding mechanism according to claim 1, characterized in that: The pressing member (2) is fixed to the matching member (1) by welding; or, The pressing piece (2) is provided with a fastening piece (5) for fastening it to the matching piece (1).

7. The nozzle holding mechanism according to claim 1, characterized in that: The matching component (1) is provided with a channel (13) communicating with the nozzle space, and the channel (13) is provided with a pre-filter (6).

8. The nozzle holding mechanism according to claim 7, characterized in that: It also comprises a flow guiding member (7), wherein a groove (71) is provided at the distal end of the flow guiding member (7); The matching piece (1) is arranged in the groove (71), and a sealing ring (8) is arranged between the matching piece (1) and the groove (71).

9. The nozzle holding mechanism according to any one of claims 1 to 8, characterized in that: A plane (14) is provided between the protrusion (11) and the inclined surface (12), and a step (15) is formed at the connection between the plane (14) and the inclined surface (12), thereby limiting the outward turning of the bottom of the elastic member (3).

10. The nozzle holding mechanism according to claim 9, characterized in that: The bottom of the elastic member (3) has an arc-shaped convex bump (31), and the convex bump (31) can form a surface seal and a line seal with the inclined surface (12) and the step (15) respectively.

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