Nozzle structure and liquid delivery device

Abstract

The utility model discloses a nozzle structure and a liquid delivery device, including a flow guide component, a matching base, a retaining frame, a chip and a pressing piece, wherein the flow guide component has a distal end with a groove; the matching base is arranged in the inner bottom of the groove; the retaining frame is arranged above the matching base and forms a cavity of a sealing medium with the retaining frame; the chip is clamped in the cavity by the retaining frame; the pressing piece is arranged on the outer side of the retaining frame, and the pressing piece has a radially extending outer edge; wherein the outer edge can cooperate with the distal end stopper of the flow guide component, thereby limiting the maximum downward movement stroke of the pressing piece; and a first protrusion is arranged at the lower end of the outer edge, thereby forming a circumferentially continuous seal at the distal end of the flow guide component. In the nozzle structure, the outer edge can form a stopper with the distal end of the flow guide component to prevent the pressing piece from over-travel downward movement and causing destructive damage to the chip, thereby effectively protecting the chip safety; the double sealing design provides a reliable high-pressure environment for the chip and greatly improves the sealing performance of the nozzle structure itself.

Description

Technical Field

[0001] The utility model relates to the technical field of atomization, in particular to a nozzle structure and a liquid conveying device. Background Art

[0002] The soft mist device for inhalation medication generates fine droplets through the nozzle structure under high pressure. Many droplets are sprayed out of the device in the form of mist, thus entering the inhalation medication. The particle size of tiny particles that can be directly absorbed by the lungs is about 1-5 microns, and the liquid pressure required to turn the drug liquid into fine droplets of 1-5 microns is roughly 5Mpa to 40Mpa. In this high-pressure environment, it is particularly important that the sealing of the nozzle structure can meet this liquid pressure.

[0003] In the existing nozzle structure, such as the U.S. patent No. US9027967B2, the fluid component 5 is arranged in the cavity formed by the elastic component 4 and the matching component 9, and the elastic component 4 is fixed by the retainer 1 on the outside thereof. The applicant noted that because the retainer lacks effective limiting measures, the risk of the fluid component being damaged by pressure increases as it gets closer to the matching component. In addition, there is only one seal (formed by the elastic component and the matching component) on the periphery of the fluid component, which makes it difficult to ensure that the sealing of the nozzle structure meets the requirements of long-term use. Utility Model Content

[0004] The utility model aims to provide a nozzle structure and a liquid delivery device, which can protect the chip from being damaged and affecting atomization by improving the pressing piece (that is, the retainer), and at the same time improve the sealing performance and reliability of the nozzle structure.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] A nozzle structure, comprising:

[0007] a flow guiding member having a distal end with a groove;

[0008] A matching base member, disposed in the inner bottom of the groove;

[0009] A retainer, disposed above the mating base and forming a cavity with the mating base for sealing the medium;

[0010] A chip is clamped in the cavity by the holder, and the chip is used to atomize the medium in the cavity;

[0011] A pressing piece, arranged on the outer side of the retaining frame, the pressing piece has an outer edge extending radially;

[0012] The outer edge can cooperate with the distal stopper of the flow guide component to limit the maximum downward movement of the pressing piece; and a first protrusion is provided at the lower end of the outer edge to form a circumferentially continuous seal at the distal end of the flow guide component.

[0013] In some embodiments, the pressing piece is fixed to the distal end of the flow guiding member by welding; or,

[0014] A fastener is arranged on the outer side of the pressing piece, and the fastener is threadedly connected and fixed to the distal end of the flow guiding component.

[0015] In some embodiments, the first protrusion is made of metal, and the first protrusion is integrally formed with the outer edge; or,

[0016] The first protrusion is made of rubber material, and the first protrusion portion is embedded in the outer edge.

[0017] In some embodiments, a filter element is disposed in the mating base element;

[0018] The particle size range filtered by the filter element is less than or equal to 0.1 mm, and the medium enters the cavity after passing through the filter element.

[0019] In some embodiments, an O-ring is disposed between the mating base and the inner bottom of the groove, and the filter is located inside the O-ring.

[0020] In some embodiments, the retainer includes an inner side surface and an outer side surface disposed opposite to each other;

[0021] The included angle between the inner side surface and the vertical surface is 50°-70°, and the included angle between the outer side surface and the vertical surface is 4°-8°.

[0022] In some embodiments, the retainer further comprises a second protrusion connecting the inner side surface and the outer side surface;

[0023] The upper end of the mating base is provided with a convex ring facing the second protrusion, and the convex ring is interference-fitted with the second protrusion to form a circumferentially continuous seal.

[0024] In some embodiments, the lower end of the chip is suspended above the mating base.

[0025] In some embodiments, a gasket is disposed between the chip and the pressing member, and a through hole is disposed in the middle of the gasket.

[0026] In some embodiments, the chip comprises:

[0027] A first plate, wherein a first filtering structure is disposed on the first plate, and the first filtering structure filters particles with a diameter range of less than or equal to 0.003 mm;

[0028] A second plate, wherein a second filtering structure is disposed on the second plate, and the second filtering structure filters particles with a diameter range of less than or equal to 0.01 mm;

[0029] The first plate and the second plate are interlocked with each other, so that the first filtering structure and the second filtering structure are assembled together.

[0030] In some embodiments, a conical spray hole is provided in the middle of the upper end of the pressing piece, and the axial cross-sectional angle of the spray hole is 70°-120°.

[0031] A liquid delivery device comprises the above-mentioned nozzle structure.

[0032] In some embodiments, the liquid delivery device is a nebulizer for delivering a pharmaceutical liquid.

[0033] Compared with the prior art, the beneficial effects of the present invention include at least:

[0034] 1. The outer edge can form a stopper with the far end of the guide member to prevent the pressing piece from moving down beyond the travel and causing destructive damage to the chip, thus effectively protecting the chip safety.

[0035] 2. The first protrusion can form a second seal at the far end of the flow guide component. The double seal design provides a reliable high-pressure environment for the chip and greatly improves the sealing performance of the nozzle structure itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the nozzle structure of the present utility model.

[0037] Figure 2 It is another structural schematic diagram of the nozzle structure of the utility model.

[0038] Figure 3 It is a partially exploded structural schematic diagram of the nozzle structure of the utility model.

[0039] Figure 4 It is a schematic diagram of the structure of the chip in the utility model.

[0040] Figure 5 yes Figure 4 Schematic diagram of the decomposition structure.

[0041] Figure 6 It is a schematic structural diagram of a liquid delivery device according to an embodiment of the utility model.

[0042] In the figure: 1. guide member; 101. groove; 2. matching base; 201. convex ring; 3. retaining frame; 301. inner side; 302. outer side; 303. second protrusion; 4. chip; 401. first plate; 402. second plate; 403. first filter structure; 404. second filter structure; 5. pressing piece; 501. outer edge; 502. spray hole; 6. first protrusion; 7. fastener; 8. filter element; 9. O-ring; 10. gasket. DETAILED DESCRIPTION

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0044] The words expressing positions and directions described in the present utility model are all explained by taking the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of the present utility model.

[0045] The nozzle structure of the present application is mainly used in the field of medical atomization, and can also be applied to technical fields such as makeup, irrigation, humidification, dust removal, etc., without limitation here.

[0046] See also Figures 1 to 3 As shown, the utility model provides a nozzle structure, including a flow guide component 1, a matching base component 2, a retaining frame 3, a chip 4 and a pressing component 5.

[0047] The guide member 1 is the main part of the nozzle structure, and its shape is roughly tubular. The two ends of the guide member 1 in the length direction are respectively a proximal end and a distal end. The proximal end is used for connecting the infusion tube, which is omitted in this application, and the distal end is provided with a groove 101 for installing components such as the matching base 2, the chip 4, etc. (such as Figure 1 and Figure 2 In addition, a flow channel connecting the proximal end and the distal end is provided inside the flow guide member 1, so as to realize normal transportation of the medium.

[0048] The matching base member 2 is arranged in the inner bottom of the groove 101 and keeps itself in a horizontal and stable state. A channel running through from top to bottom is arranged in the middle of the matching base member 2 to realize the normal conveyance of the medium.

[0049] The retainer 3 is arranged above the mating base 2 and forms a cavity for sealing the medium therewith. Figures 1 to 3As shown, a second protrusion 303 is provided at the bottom of the retaining frame 3, and a convex ring 201 facing the second protrusion 303 is provided at the upper end of the matching base 2. The convex ring 201 can interfere with the second protrusion 303 to form a cavity for accommodating the medium and form a continuous seal in the circumferential direction, that is, the first seal.

[0050] The chip 4 is clamped in the cavity by the holder 3, and its function is to atomize the medium in the cavity to obtain the required fine droplets.

[0051] The pressure piece 5 is in the shape of a sleeve and is arranged on the outside of the retaining frame 3 to fix the retaining frame 3 and press it against the mating base 2 to form an effective seal. In the present application, the pressure piece 5 has a radially extending outer edge 501, which can cooperate with the distal stopper of the flow guide member 1 in height, thereby limiting the maximum downward movement of the pressure piece 5, preventing the over-travel downward movement from causing destructive damage to the chip 4, and effectively protecting the chip 4. In addition, a first protrusion 6 is provided at the lower end of the outer edge 501, which can form a circumferentially continuous seal at the distal end of the flow guide member 1, that is, a second seal. The double seal design provides a reliable high-pressure environment for the chip 4 and greatly improves the sealing performance of the nozzle structure itself.

[0052] See also Figure 1 As shown, in other embodiments, a fastener 7 is provided on the outside of the pressure piece 5, and the fastener 7 is threadedly connected and fixed to the distal end of the flow guide member 1. Exemplarily, the fastener 7 can be a stop nut with an internal thread, and the distal end of the flow guide member 1 is provided with an external thread, and the two can be detachably connected in a threaded manner. This nozzle structure can adjust the tightness of the first seal on the one hand, and is also convenient for later maintenance operations on the other hand.

[0053] See also Figure 2 As shown, in some embodiments, the compression piece 5 is fixed to the distal end of the flow guide member 1 by welding. This nozzle structure is simple in design and can effectively reduce the cost of component assembly. Preferably, the compression piece 5 and the distal end of the flow guide member 1 can be fixed by full welding to further enhance the sealing performance of the second sealing point.

[0054] In some embodiments, the first protrusion 6 is made of metal, and the first protrusion 6 and the outer edge 501 are integrally formed. This seal is a metal hard seal, which is easy to manufacture and has low cost.

[0055] Alternatively, the first protrusion 6 is made of rubber, and part of the first protrusion 6 is embedded in the outer edge 501 (not shown). This seal is a rubber seal, which has the advantage that it can be replaced and remedied after the second seal fails.

[0056] See also Figures 1 to 3As shown, in some embodiments, a filter element 8 is provided in the mating base 2. The filter element 8 is provided in a channel in the middle of the mating base 2. The particle size range of the filtration is less than or equal to 0.1 mm. The medium enters the cavity after passing through the filter element 8, which plays a role of pre-filtration to avoid clogging the chip 4 and affecting the atomization function.

[0057] Furthermore, an O-ring 9 is provided between the mating base 2 and the inner bottom of the groove 101, and the filter 8 is located in the O-ring 9. Specifically, a concave angle is provided at the bottom edge of the mating base 2, and a ring groove for installing the O-ring 9 can be formed after mating with the groove 101. The O-ring 9 is used to enhance the circumferential sealing of the filter 8 and improve the effect of medium pre-filtration.

[0058] See also Figure 3 As shown, in some embodiments, the retaining frame 3 can be made of elastic material, such as rubber.

[0059] The holder 3 includes an inner side surface 301 and an outer side surface 302 which are arranged opposite to each other, and the inner side surface 301 and the outer side surface 302 are connected by a second protrusion 303. In the present application, the angle between the inner side surface 301 and the vertical surface is 50°-70°, preferably 55-60°. Within this range, the medium enters the cavity and squeezes the inner side surface 301, so that the holder 3 can better fix the chip 4. The angle between the outer side surface 302 and the vertical surface is 4°-8°, preferably 5°-6°. On the basis of interference with the inner side of the pressing piece 5, the insertion and assembly of the holder 3 is more convenient within this range.

[0060] like Figure 1 and Figure 2 As shown, in some embodiments, the lower end of the chip 4 is suspended above the mating base 2 to avoid damage caused by extrusion and collision during assembly, ensuring that the atomization function is not affected. Exemplarily, the distance from the lower end of the chip 4 to the mating base 2 is controlled between 1-3 mm, for example, 1 mm, 1.6 mm, 2 mm, 2.4 mm, etc.

[0061] In some embodiments, a gasket 10 is provided between the chip 4 and the compression piece 5, and the gasket 10 can protect the end of the chip 4 and prevent the compression piece 5 from damaging the outlet of the chip 4. A through hole is provided in the middle of the gasket 10 to ensure smooth release of the particles atomized by the chip 4.

[0062] See also Figure 4 and Figure 5As shown, in some embodiments, the chip 4 includes a first plate 401 and a second plate 402. The first plate 401 is provided with a first filter structure 403, and the particle size range filtered by the first filter structure 403 is less than or equal to 0.003 mm, and the second plate 402 is provided with a second filter structure 404, and the particle size range filtered by the second filter structure 404 is less than or equal to 0.01 mm.

[0063] In the present application, the first filter structure 403 and the second filter structure 404 are separately designed on two plates, and only the first plate 401 and the second plate 402 need to be interlocked with each other, so that the first filter structure 403 and the second filter structure 404 are assembled together, thereby reducing the patterning difficulty and manufacturing accuracy requirements of the filter structure inside the chip 4.

[0064] See also Figures 1 to 3 As shown, in some embodiments, a conical spray hole 502 is provided in the middle of the upper end of the pressing member 5, and the axial cross-sectional angle of the spray hole 502 is 70°-120°. By selecting different angles, different mist patterns and doses can be obtained. In simple terms, the smaller the axial cross-sectional angle of the spray hole 502, the narrower the mist pattern formed, and the released fine droplets will collide and aggregate with the hole wall, resulting in a smaller inhalable dose. Preferably, the axial cross-sectional angle of the spray hole 502 is 90°-110°.

[0065] See also Figure 6 As shown, the utility model also discloses a liquid delivery device, comprising the above-mentioned nozzle structure. In some embodiments, the liquid delivery device is an atomizer for delivering drug liquid.

[0066] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the utility model. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the utility model without departing from the principles and purpose of the utility model. All of these changes should fall within the scope of protection of the claims of the utility model.

Claims

1. A nozzle structure, characterized in that: include: A flow guiding member (1), the flow guiding member (1) having a distal end with a groove (101); A matching base member (2) arranged in the inner bottom of the groove (101); A retaining frame (3) is arranged above the mating base member (2) and forms a cavity with the mating base member for sealing the medium; A chip (4) is clamped in the cavity by the retaining frame (3), and the chip (4) is used to atomize the medium in the cavity; A pressing piece (5) is arranged on the outside of the retaining frame (3), and the pressing piece (5) has a radially extending outer edge (501); The outer edge (501) can cooperate with the distal end stop of the flow guide member (1), thereby limiting the maximum downward movement stroke of the pressing member (5); and a first protrusion (6) is provided at the lower end of the outer edge (501), thereby forming a circumferentially continuous seal at the distal end of the flow guide member (1).

2. The nozzle structure according to claim 1, characterized in that: The pressing piece (5) is welded and fixed to the distal end of the flow guiding member (1); or, A fastener (7) is provided on the outside of the pressing piece (5), and the fastener (7) is threadedly connected and fixed to the distal end of the flow guide component (1).

3. The nozzle structure according to claim 1, characterized in that: The first protrusion (6) is made of metal, and the first protrusion (6) and the outer edge (501) are integrally formed; or, The first protrusion (6) is made of rubber material, and a portion of the first protrusion (6) is embedded in the outer edge (501).

4. The nozzle structure according to claim 1, characterized in that: A filter element (8) is arranged in the matching base element (2); The particle size range filtered by the filter element (8) is less than or equal to 0.1 mm, and the medium enters the cavity after passing through the filter element (8).

5. The nozzle structure according to claim 4, characterized in that: An O-ring (9) is provided between the matching base component (2) and the inner bottom of the groove (101), and the filter component (8) is located inside the O-ring (9).

6. The nozzle structure according to claim 1, characterized in that: The retaining frame (3) comprises an inner side surface (301) and an outer side surface (302) which are arranged opposite to each other; The included angle between the inner side surface (301) and the vertical surface is 50°-70°, and the included angle between the outer side surface (302) and the vertical surface is 4°-8°.

7. The nozzle structure according to claim 6, characterized in that: The retaining frame (3) further comprises a second protrusion (303) connecting the inner side surface (301) and the outer side surface (302); The upper end of the mating base (2) is provided with a convex ring (201) facing the second protrusion (303); the convex ring (201) and the second protrusion (303) are interference-fitted to form a circumferentially continuous seal.

8. The nozzle structure according to claim 1, characterized in that: The chip (4) comprises: A first plate (401), wherein a first filtering structure (403) is disposed on the first plate (401), and the first filtering structure (403) filters particles with a diameter range of less than or equal to 0.003 mm; A second plate (402), wherein a second filtering structure (404) is disposed on the second plate (402), and the second filtering structure (404) filters particles with a diameter range of less than or equal to 0.1 mm; The first plate (401) and the second plate (402) are interlocked, so that the first filtering structure (403) and the second filtering structure (404) are assembled together.

9. The nozzle structure according to claim 1, characterized in that: A conical spray hole (502) is provided in the middle of the upper end of the pressing piece (5), and the axial cross-sectional angle of the spray hole (502) is 70°-120°.

10. A liquid delivery device, characterized in that: Comprising the nozzle structure according to any one of claims 1-9.

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