CN220801688U

CN220801688U - Spraying assembly and spraying device

Info

Publication number: CN220801688U
Application number: CN202322114819.8U
Authority: CN
Inventors: 季浩浩; 孙小元; 赵光涛
Original assignee: Suzhou Singmed Medical Device Science And Technology Ltd
Current assignee: Suzhou Singmed Medical Device Science And Technology Ltd
Priority date: 2023-08-08
Filing date: 2023-08-08
Publication date: 2024-04-19
Anticipated expiration: 2033-08-08

Abstract

The utility model discloses a spray assembly, which comprises an upper shell and a pressure pump, wherein the upper shell is provided with an inner cavity, and the inner cavity is provided with a first flow passage extending axially; the pump includes a piston having a second axially extending flow passage; the first flow passage is internally provided with a first concave-convex structure, the second flow passage is externally provided with a second concave-convex structure, and the first concave-convex structure is in snap fit with the second concave-convex structure, so that the inner cavity is in sealing connection with the piston. Also disclosed is a spray device comprising a spray assembly as claimed in any one of the preceding claims. This spray set and atomizer are through optimizing seal structure, make assembly structure more firm on the one hand, on the other hand improved sealing performance, effectively guaranteed the atomizing effect of medicament liquid.

Description

Spraying assembly and spraying device

Technical Field

The utility model relates to the field of medical equipment, in particular to a spraying component and a spraying device.

Background

Nasal nebulization is an operation of nebulizing the nasal cavity, which is primarily intended for patients suffering from rhinitis, nasal polyps or post-nasal surgery. The atomization treatment is usually carried out by means of a special nasal spray device, and the sealing of the connection between the pump and the nozzle directly influences the atomization effect of the medicament.

For example, in the patent with publication No. CN206473655U, the hollow piston rod of the piston pump and the pressing nozzle adopt a connection mode of shaft hole matching, which has the advantage of simplified structure, but in the actual use process, as the number of pressing times increases and the impact and vibration are carried with the user, the interference fixation of the hollow piston rod and the pressing nozzle can be loosened, and even the possibility of loosening occurs when serious, so that the sealing failure of the connection part of the hollow piston rod and the pressing nozzle is caused, thereby affecting the atomization effect of the medicament.

In view of the foregoing, there is a need for an improved spray assembly in a nasal spray device, and therefore, the present application provides a spray assembly and a spray device.

Disclosure of utility model

The utility model aims to provide a spraying component and a spraying device, which aim to improve the sealing performance of the spraying component through structural optimization so as to further ensure the atomization administration effect.

The utility model adopts the following technical scheme:

A spray assembly, comprising:

an upper shell provided with an inner cavity having a first flow passage extending axially;

A pump including a piston having an axially extending second flow passage;

the first flow passage is internally provided with a first concave-convex structure, the second flow passage is externally provided with a second concave-convex structure, and the first concave-convex structure is in snap fit with the second concave-convex structure, so that the inner cavity is in sealing connection with the piston.

In some embodiments, the first flow channel includes a first end;

The first concave-convex structure is positioned at the first end of the first flow channel and comprises a first convex part and a second concave part which are sequentially arranged along the medium conveying direction;

The first convex part is formed by extending the inner wall of the first flow channel inwards, and the second concave part is formed by recessing the inner wall of the first flow channel outwards.

In some embodiments, the end of the plunger adjacent the inner cavity is a necked end;

The second concave-convex structure is positioned at the necking end and comprises a first concave part and a second convex part which are sequentially arranged along the medium conveying direction;

Wherein the first recess is formed by a depression in the outer periphery of the necked-in end and the second projection is formed by an extension in the outer periphery of the necked-in end.

In some embodiments, the first protrusion and the first recess are both semicircular, and the first protrusion is snap-fitted with the first recess;

The second convex part and the second concave part are rectangular, and the second convex part is in snap fit with the second concave part.

In some embodiments, an interference portion is provided on a side of the second convex portion remote from the first concave portion;

The interference portion is formed by bulging outward from the outer periphery of the constricted end, and a bulging dimension of the interference portion is smaller than an extension dimension of the second projection.

In some embodiments, a nozzle core is disposed within the first flow channel, a gap exists between the nozzle core and the inner cavity, and the gap communicates with the second flow channel.

In some embodiments, the second flow channel is provided with a plurality of diameter-expanding portions at intervals, and the cross-sectional area of each diameter-expanding portion gradually decreases along the medium conveying direction.

In some embodiments, the pump further comprises:

The pump body is provided with a pump cavity, and the piston part is arranged in the pump cavity in a sliding way;

A valve switch disposed in the pump chamber, the valve switch portion being interposed inside the piston and being in sealing engagement with the second flow passage;

And the spring is arranged between the pump cavity and the valve switch, so as to provide pretightening force for sealing the second flow passage for the valve switch.

In some embodiments, a cover is provided on the outer periphery of the pump, and the upper case is slidably sleeved on the cover.

A spray device comprising a spray assembly as claimed in any one of the preceding claims.

Compared with the prior art, the utility model has the beneficial effects that at least: through optimizing seal structure, on the one hand make assembly structure more firm, on the other hand improved sealing performance, effectively guaranteed the atomizing effect of medicament liquid.

Drawings

Fig. 1 is a schematic view of a spray assembly according to an embodiment of the present utility model.

Fig. 2 is a schematic view of a first concave-convex structure according to an embodiment of the present utility model.

Fig. 3 is a schematic view of a second concave-convex structure according to an embodiment of the present utility model.

Fig. 4 is a schematic view of a spray assembly with a cap according to an embodiment of the present utility model.

In the figure: 1. an upper case; 11. an inner cavity; 111. a first flow passage; 2. a pressure pump; 21. a piston; 211. a second flow passage; 212. a necked end; 213. an expanded diameter portion; 22. a pump body; 23. a valve switch; 24. a spring; 3. a first concave-convex structure; 31. a first convex portion; 32. a second concave portion; 4. a second concave-convex structure; 41. a first concave portion; 42. a second convex portion; 43. an interference unit; 5. an inner core of the spray head; 6. a cover body; 7. and (3) a bottle body.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted.

The words expressing the positions and directions described in the present utility model are described by taking the drawings as an example, but can be changed according to the needs, and all the changes are included in the protection scope of the present utility model.

Referring to fig. 1 to 4, the present application discloses a spray assembly comprising an upper housing 1 and a pressure pump 2.

Referring to fig. 1 and 4, the upper case 1 is generally in an inverted T-shaped structure, and a nozzle opening is provided at one end of the upper case 1, which is relatively sharp, for converting the medicament liquid into atomized medicament droplets, and a pressing area is formed at one end of the upper case 1, which is relatively flat, so that a patient can apply pressure to the pump 2 through the upper case 1.

Furthermore, the upper casing 1 is internally provided with an inner cavity 11, the inner cavity 11 is of a substantially tubular structure, the inner cavity 11 is used for abutting against a piston 21 of the pump 2 to realize the delivery of medicament liquid from the bottle 7 to the nozzle opening (see fig. 4), specifically, the inner cavity 11 is provided with a first flow channel 111 extending axially, the pump 2 can pump medicament liquid in the bottle 7 to the first flow channel 111 under the drive of external force, and atomized medicament liquid drops can be released outwards through the nozzle opening for atomization treatment.

In some embodiments, the inner cavity 11 is coaxial with and integrally formed with the upper case 1, and the length of the inner cavity 11 is smaller than the entire length of the upper case 1, so that the inner cavity 11 is accommodated in the upper case 1 to be protected.

As shown in fig. 1, the pump 2 includes a piston 21, a pump body 22, a valve switch 23, and a spring 24. The pump body 22 is provided with a pump cavity, the piston 21 is partially arranged in the pump cavity in a sliding way, the piston 21 is provided with a second flow passage 211 extending in the axial direction, the valve switch 23 is arranged in the pump cavity, the valve switch 23 is partially inserted into the piston 21 and is in sealing fit with the second flow passage 211, and the spring 24 is arranged between the pump cavity and the valve switch 23 so as to provide a pretightening force for blocking the second flow passage 211 for the valve switch 23.

The pump 2 is generally used with a check valve (not shown), which is usually mounted at an end of the pump body 22 away from the piston 21, and when the piston 21 is pressed once to open or close the valve switch 23, a certain amount of medicament liquid can be delivered from the bottle 7 to the second flow channel 211, and finally flows to the first flow channel 111 to realize the liquid supply function.

As shown in fig. 2, the first concave-convex structure 3 is provided in the first flow passage 111, for example, the first concave-convex structure 3 is located at a first end of the first flow passage 111 (defining an end of the first flow passage 111 near the pump 2 as a first end and an end remote from the pump 2 as a second end) so as to be fittingly connected with the piston 21.

In some embodiments, the first relief structure 3 comprises a first protrusion 31 and a second recess 32 arranged in sequence along the transport direction of the medium (i.e. the pharmaceutical liquid). Wherein the first protrusion 31 is formed by extending inward from the inner wall of the first flow channel 111, and the second recess 32 is formed by recessing outward from the inner wall of the first flow channel 111.

As shown in fig. 3, the second concave-convex structure 4 is disposed outside the second flow path 211, for example, the second concave-convex structure 4 is located at the constricted end 212 (the end of the plunger 21 near the inner chamber 11 is the constricted end 212), so that the volume is reduced and the convenience of assembly is improved.

The second concave-convex structure 4 includes a first concave portion 41 and a second convex portion 42 that are disposed in order in the medium conveyance direction. Wherein the first concave portion 41 is formed by recessing inward the outer circumference of the necked-down end 212, and the second convex portion 42 is formed by extending outward the outer circumference of the necked-down end 212.

With continued reference to fig. 1, the first protrusion 31 corresponds to the first recess 41, and the second protrusion 42 corresponds to the second recess 32. Illustratively, the first protruding portion 31 and the first recessed portion 41 are ring-shaped structures with substantially semicircular cross sections, and have arc-shaped transition sections on the sides thereof, which facilitate guiding assembly. The second convex portion 42 and the second concave portion 32 have annular structures with substantially rectangular cross sections, so as to obtain a better fastening effect. In some other embodiments, the first protrusion 31 and the first recess 41, the second protrusion 42 and the second recess 32 differ from the ring-shaped structure, which may be discontinuous, only by slightly inferior tightness.

The piston 21 of the pump 2 is inserted into the inner cavity 11 of the upper shell 1, and the first concave-convex structure 3 and the second concave-convex structure 4 are clamped and fixed, so that the inner cavity 11 and the piston 21 can be connected in a sealing and stable manner. Specifically, the spraying assembly improves the stability of the connecting structure of the inner cavity 11 and the piston 21 through the buckle design, so that the inner cavity 11 and the piston 21 are fixed more firmly, and the problems of loosening, separation and the like are not easy to occur, thereby avoiding influencing the sealing performance. On the other hand, after the convex portion and the concave portion are combined, the conventional plane seal is changed into a zigzag face seal, so that leakage of the medicament liquid is more difficult to occur, a seal is formed at the buckling position of the first convex portion 31 and the first concave portion 41, and a second seal is formed at the buckling position of the second convex portion 42 and the second concave portion 32, and the sealing structure is further strengthened.

Referring to fig. 1 and 3, in a preferred embodiment, an interference portion 43 is disposed on a side of the second protrusion 42 away from the first recess 41, and the interference portion 43 is in interference fit with an inner wall of the first flow channel 111 to achieve sealing, so as to further improve the sealing performance of the spray assembly. Illustratively, the interference portion 43 is formed by a peripheral outward bulge of the necked-down end 212, which is generally arcuate in configuration. The interference portion 43 has a bulge dimension which is much smaller than the extension dimension of the second projection 42 to minimize the influence of deformation of the inner chamber 11 on the sealing. Of course, a concave surface corresponding to the interference portion 43 may be provided in the first flow channel 111 (as shown in fig. 2, the concave surface is located above the second concave portion 32).

Referring to fig. 1, in a specific embodiment, a nozzle core 5 is disposed in the first flow channel 111, a gap exists between the nozzle core 5 and the inner cavity 11, so that a plurality of specific liquid channels (not shown) are formed, and the gap communicates with the second flow channel 211, and the medicine liquid inputted from the second flow channel 211 can flow out of the plurality of liquid channels and collide with each other, so that the atomization performance is improved.

Referring to fig. 1 and 3, in a preferred embodiment, the second flow channel 211 is provided with a plurality of expanding portions 213 at intervals, and the cross-sectional area of each expanding portion 213 gradually decreases along the medium conveying direction.

The enlarged diameter portion 213 prevents the material for the piston 21 from shrinking due to the excessively thick thickness, and ensures the stable molding of the second flow passage 211. Illustratively, there are three enlarged diameter portions 213, and the enlarged diameter portions 213 have a substantially elliptical or rectangular structure, and the sectional area gradually decreases from the pump 2 toward the upper housing 1.

Referring to fig. 4, in a specific embodiment, a cover 6 is disposed on the outer periphery of the pump 2, and the cover 6 is preferably a threaded cover, and is used for being detachably connected with the bottle 7, so as to realize convenient replacement of different medicament liquids.

In addition, the upper shell 1 is slidably sleeved on the cover 6, specifically, the pressing area of the upper shell 1 is buckled on the cover 6 and is beneficial to sliding guiding of the cover 6, so that the smoothness of pressing action is improved.

The application also discloses a spraying device, such as nasal spray, which comprises the spraying assembly, wherein the spraying assembly is stable in structure and good in sealing performance.

While embodiments of the present utility model have been shown and described, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that changes, modifications, substitutions and alterations may be made therein by those of ordinary skill in the art without departing from the spirit and scope of the utility model, all such changes being within the scope of the appended claims.

Claims

1. A spray assembly, comprising:

A pump including a piston having an axially extending second flow passage;

It is characterized in that the method comprises the steps of,

2. The spray assembly of claim 1 wherein said first flow passage comprises a first end;

3. The spray assembly of claim 2 wherein an end of said plunger adjacent said inner cavity is a necked-down end;

4. A spray assembly according to claim 3 wherein the first protrusion and first recess are each semi-circular, the first protrusion snap-fitting with the first recess;

5. A spray assembly according to claim 3, wherein the side of the second protrusion remote from the first recess is provided with an interference portion;

6. The spray assembly of claim 1 wherein a spray head core is disposed within said first flow passage, a gap exists between said spray head core and said inner cavity, and said gap communicates with said second flow passage.

7. The spray assembly of claim 1 wherein said second flow passage is provided with a plurality of enlarged diameter portions at intervals, each of said enlarged diameter portions having a cross-sectional area that gradually decreases in the direction of media transport.

8. The spray assembly of claim 1, wherein the pump further comprises:

9. The spray assembly of claim 1 wherein said pump has a cover disposed about an outer periphery thereof, said upper housing slidably engaging said cover.

10. A spray device comprising a spray assembly as claimed in any one of claims 1 to 9.