Atomization mechanism of medical atomization device

Abstract

The utility model relates to an atomizing mechanism of a medical atomizing device. The atomizing mechanism comprises a nozzle, a nozzle cover and a driving device, the pre-pressing valve comprises a valve seat and a valve element, the valve element comprises an elastic part, the elastic part abuts against the valve seat, a first cavity and a second cavity which are isolated from each other are defined by the elastic part and the valve seat, the first cavity is communicated with the nozzle, and when the pressure in the second cavity is larger than or equal to a preset value, the first cavity is communicated with the nozzle. And the elastic part is separated from the valve seat, so that the first cavity and the second cavity are communicated with each other. When the pressure in the second cavity is smaller than a preset value, the elastic part of the valve element abuts against the valve seat under the action of the elastic force of the elastic part, so that the first cavity and the second cavity are isolated from each other, liquid in the second cavity cannot enter the first cavity, spraying is stopped, after spraying is stopped, the liquid cannot enter the first cavity, dripping leakage is generated at the position of the spraying opening, and the spraying effect is improved. Therefore, the leakage phenomenon generated at the nozzle after the atomization mechanism stops spraying can be eliminated.

Description

Technical Field

[0001] This application relates to the technical field of atomization, and particularly to an atomization mechanism of a medical atomization device. Background Art

[0002] When a liquid with pressure passes through the atomization mechanism of a medical atomization device at a certain speed, the atomization mechanism can quickly atomize the liquid into tiny droplets. However, for traditional atomization mechanisms, after the atomization mechanism finishes spraying, there will be a phenomenon of liquid dripping in the atomization mechanism. Summary of the Invention

[0003] One technical problem solved by this application is how to reduce the phenomenon of liquid dripping in the atomization mechanism of a medical atomization device.

[0004] An atomization mechanism of a medical atomization device includes:

[0005] A nozzle having a spray opening; and

[0006] A pre-pressure valve including a valve seat and a valve core. The valve core includes an elastic part. The elastic part abuts against the valve seat and encloses a first chamber and a second chamber that are isolated from each other. The first chamber is communicated with the spray opening. When the pressure in the second chamber is greater than or equal to a preset value, the elastic part disengages from the valve seat to communicate the first chamber and the second chamber with each other.

[0007] In one embodiment, the valve seat is provided with a receiving cavity. The valve core is received in the receiving cavity. The valve core further includes a mounting part and a connecting part. The mounting part is fixedly connected to the valve seat. The connecting part is connected between the mounting part and the elastic part. The elastic part can divide the receiving cavity into a first chamber and a second chamber. In a natural state, the cross-sectional dimension of the connecting part is smaller than the cross-sectional dimensions of the mounting part and the elastic part.

[0008] In one embodiment, the valve core further includes a reinforcing rib. The reinforcing rib protrudes from the connecting part, and both ends of the reinforcing rib are respectively connected to the elastic part and the mounting part.

[0009] In one embodiment, the elastic part encloses an open cavity. The open cavity is communicated with the first chamber. From one end of the open cavity close to the connecting part to the end far from the connecting part, the diameter of the open cavity increases.

[0010] In one embodiment, the valve seat includes a seat body, a sleeve and a limiting post. The seat body defines the accommodating cavity. The sleeve and the limiting post both protrude from the seat body. The sleeve is disposed around the limiting post. The sleeve is snap-connected to the nozzle. The limiting post is inserted into the nozzle. An annular cavity communicating with the spray orifice is formed between the sleeve and the limiting post. A through hole communicating with the first cavity and the annular cavity is formed in the seat body.

[0011] In one embodiment, the nozzle includes a bottom plate, an outer sleeve ring and an inner sleeve ring. The outer sleeve ring and the inner sleeve ring protrude from the bottom plate. The outer sleeve ring is disposed around the inner sleeve ring. The outer sleeve ring is snap-connected to the valve seat. A communication cavity communicating with the spray orifice and the first cavity is defined between the inner sleeve ring and the bottom plate. The communication cavity is in clearance fit with the valve seat.

[0012] In one embodiment, the nozzle further includes a first convex block. The first convex block protrudes from the side wall surface of the communication cavity. The number of the first convex blocks is multiple. The multiple first convex blocks are arranged at intervals along the circumferential direction of the inner sleeve ring. The first convex blocks are disposed around the valve seat and abut against the valve seat.

[0013] In one embodiment, the nozzle further includes a second convex block. The second convex block protrudes from the bottom wall surface of the communication cavity. The number of the second convex blocks is multiple. The multiple second convex blocks are arranged at intervals along the circumferential direction of the inner sleeve ring. The second convex blocks abut against the end of the valve seat.

[0014] In one embodiment, a first counterbore is recessed on the bottom wall surface of the communication cavity. A second counterbore is recessed on the bottom wall surface of the first counterbore. The diameter of the first counterbore is larger than that of the second counterbore. The second convex blocks are disposed around the first counterbore. The end of the second counterbore away from the first counterbore forms the spray orifice.

[0015] In one embodiment, the second counterbore is a circular hole. The number of the second counterbores is one or more.

[0016] One technical effect of an embodiment of the present application is that when the pressure in the second cavity is less than a preset value, the elastic part of the valve core will abut against the valve seat under the action of its own elastic force, so that the first cavity and the second cavity are isolated from each other, and the liquid in the second cavity cannot enter the first cavity and the spraying stops. Therefore, after the spraying stops, the liquid cannot enter the first cavity and drip at the spray orifice, thereby eliminating the dripping phenomenon at the spray orifice after the atomization mechanism stops spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1Schematic diagram of the three-dimensional structure of a medical atomization device provided for an embodiment.

[0018] Figure 2 For Figure 1 Schematic diagram of the three-dimensional structure of the medical atomization device shown in another perspective.

[0019] Figure 3 For Figure 1 Schematic diagram of the first example decomposition structure of the medical atomization device shown.

[0020] Figure 4 For Figure 1 Schematic diagram of the second example decomposition structure of the medical atomization device shown.

[0021] Figure 5 For Figure 1 Schematic diagram of the plane sectional structure of the medical atomization device shown.

[0022] Figure 6 For Figure 1 Schematic diagram of the three-dimensional sectional structure of the medical atomization device shown.

[0023] Figure 7 For Figure 6 Schematic diagram of the partial structure of

[0024] Figure 8 For Figure 1 Schematic diagram of the three-dimensional structure of the main body mechanism in the medical atomization device shown.

[0025] Figure 9 For Figure 8 Schematic diagram of the three-dimensional structure of the main body mechanism shown in another perspective.

[0026] Figure 10 For Figure 8 Schematic diagram of the three-dimensional sectional structure of the main body mechanism shown.

[0027] Figure 11 For Figure 1 Schematic diagram of the three-dimensional sectional structure of the atomization mechanism in the medical atomization device shown.

[0028] Figure 12 For Figure 11 Schematic diagram of the decomposition structure of the atomization mechanism shown.

[0029] Figure 13 For Figure 12 Schematic diagram of the three-dimensional sectional structure of

[0030] Figure 14 For Figure 11 Schematic diagram of the three-dimensional sectional structure of the nozzle in the atomization mechanism shown.

[0031] Reference numerals: medical atomization device 10, housing 100, first housing 110, avoidance notch 111, second housing 120, bottle body 200, liquid storage chamber 210, main body mechanism 300, liquid pumping chamber 301, liquid storage chamber 302, liquid guiding chamber 303, substrate 350, first installation pipe 310, first pipe cavity 311, second installation pipe 320, second pipe cavity 321, first card hole 322, third installation pipe 330, third pipe cavity 331, fourth installation pipe 340, fourth pipe cavity 341, convex column 360, first limiting ring 371, second limiting ring 372, second card hole 3721, second conical surface 380, atomization mechanism 400, nozzle 410, bottom plate 411, first counterbore 4111, second counterbore 4112, outer sleeve ring 412, inner sleeve ring 413, communication cavity 4131, first convex block 414, second convex block 415, spray port 401, pre-pressure valve 420, valve seat 421, seat body 4211, accommodation cavity 4211a, first cavity 4211b, second cavity 4211c, through hole 4211d, sleeve 4212, annular cavity 4212a, limiting column 4213, valve core 422, elastic part 4221, open cavity 4221a, connecting part 4222, installation part 4223, reinforcing rib 4224, liquid pumping mechanism 500, liquid pumping assembly 510, button 511, first conical surface 5111, first piston 512, first elastic member 520, liquid storage mechanism 600, liquid storage assembly 610, installation seat 611, third conical surface 6111, second piston 612, sink 6121, second elastic member 620, fixed seat 630, fourth conical surface 631, control valve 700, liquid pumping hole 710, liquid storage hole 720, straw 800. Detailed implementation manners

[0032] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0033] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0034] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there is a term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the present application, unless otherwise clearly specified and limited, if there are terms such as "mounted", "connected", "connected to", "fixed", etc., these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, if there is a description such as a first feature being "on" or "under" a second feature, the meaning may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0037] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0038] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , a medical atomization device 10 provided in an embodiment of the present application can be applied to the medical field or other fields. The medical atomization device 10 includes a housing 100, a bottle body 200, a main body mechanism 300, an atomization mechanism 400, a liquid pumping mechanism 500, a liquid storage mechanism 600, and a control valve 700. The main body mechanism 300 is connected to the housing 100, and the bottle body 200, the liquid pumping mechanism 500, the liquid storage mechanism 600, the atomization mechanism 400, and the control valve 700 can be disposed on the main body mechanism 300.

[0039] Referring to Figure 1 , Figure 2 and Figure 3 , in some embodiments, the housing 100 may include a first housing 110 and a second housing 120, and the first housing 110 and the second housing 120 are detachably connected. For example, the first housing 110 and the second housing 120 can be detachably connected by means of snap connection. By the detachable connection of the first housing 110 and the second housing 120, the convenience of the medical atomization device 10 during the assembly process can be improved, thereby improving the assembly efficiency. An avoidance notch 111 is formed on the first housing 110, and the avoidance notch 111 communicates with the outside and the inner cavity of the housing 100. A part of the liquid pumping mechanism 500 can be received in the avoidance notch 111, so that a part of the liquid pumping mechanism 500 can be exposed through the avoidance notch 111, so that the user can directly contact and operate the liquid pumping mechanism 500 through the avoidance notch 111.

[0040] Referring to Figure 4 and Figure 5 , in some embodiments, the bottle body 200 is connected to the main body mechanism 300, and the bottle body 200 is provided with a liquid storage cavity 210 for storing liquid. The medical atomization device 10 may further include a straw 800. One end of the straw 800 is a fixed end and is fixedly connected to the main body mechanism 300, and the other end of the straw 800 is a free end and extends into the liquid storage cavity 210. The free end of the straw 800 is disposed near the bottom of the bottle body 200, so that the distance between the free end of the straw 800 and the bottom of the bottle body 200 can be reduced.

[0041] Refer to Figure 4 、 Figure 8 、 Figure 9 and Figure 10 ,In some embodiments, the main body mechanism 300 includes a substrate 350, a first mounting tube 310, a second mounting tube 320, a third mounting tube 330, and a fourth mounting tube 340. The first mounting tube 310, the second mounting tube 320, the third mounting tube 330, and the fourth mounting tube 340 are all protrudingly provided on the substrate 350. The first mounting tube 310 and the substrate 350 enclose a first tube cavity 311, the second mounting tube 320 and the substrate 350 enclose a second tube cavity 321, the third mounting tube 330 and the substrate 350 enclose a third tube cavity 331, and the fourth mounting tube 340 and the substrate 350 enclose a fourth tube cavity 341. The second tube cavity 321 and the third tube cavity 331 are always in communication with each other. Liquid is allowed to flow unidirectionally from the first tube cavity 311 into the third tube cavity 331, that is, liquid cannot flow from the third tube cavity 331 into the first tube cavity 311. And liquid is allowed to flow unidirectionally from the fourth tube cavity 341 into the first tube cavity 311, that is, liquid cannot flow from the fourth tube cavity 341 into the first tube cavity 311. In fact, the fourth tube cavity 341 will form a liquid guiding cavity 303, and a straw 800 is inserted into the fourth tube cavity 341. The liquid in the liquid storage cavity 210 can enter the liquid guiding cavity 303 through the straw 800.

[0042] In some embodiments, the third mounting tube 330 has the longest length, that is, the length of the third mounting tube 330 is greater than the lengths of the first mounting tube 310, the second mounting tube 320, and the fourth mounting tube 340. In this way, the third tube cavity 331 has sufficient length and volume. The first mounting tube 310 and the second mounting tube 320 are both protrudingly provided on one side in the thickness direction of the substrate 350, and the third mounting tube 330 and the fourth mounting tube 340 are both protrudingly provided on the other side in the thickness direction of the substrate 350. In this way, the layout of the first mounting tube 310, the second mounting tube 320, the third mounting tube 330, and the fourth mounting tube 340 can be optimized to achieve the structural compactness of the main body mechanism 300.

[0043] Refer to Figure 5 and Figure 10, in some embodiments, the main body mechanism 300 further includes a convex post 360 protruding from the substrate 350 and received in the first lumen 311. The number of convex posts 360 can be [a specific number], and multiple convex posts 360 are spaced apart from each other. The control valve 700 can be received in the first lumen 311 such that the control valve 700 is carried on the substrate 350, and the convex post 360 can pass through the control valve 700. By the action of the convex post 360, the control valve 700 can be well positioned to prevent the control valve 700 from rotating around the center line of the first lumen 311 within the first lumen 311, thereby improving the installation accuracy and installation efficiency of the control valve 700.

[0044] Refer to Figure 4 , Figure 8 and Figure 10 , in some embodiments, a first locking hole 322 is formed in the second mounting tube 320, and the first locking hole 322 penetrates the second mounting tube 320 so that the first locking hole 322 communicates with the second lumen 321. The atomizing mechanism 400 can be inserted into the second lumen 321, and the atomizing mechanism 400 cooperates with the first locking hole 322, thereby realizing a snap connection relationship between the atomizing mechanism 400 and the second mounting tube 320.

[0045] Refer to Figure 6 , Figure 7 and Figure 10 , in some embodiments, the main body mechanism 300 may further include a first limiting ring 371 and a second limiting ring 372, both the first limiting ring 371 and the second limiting ring 372 protrude from the substrate 350, and the first limiting ring 371, the second limiting ring 372, the third mounting tube 330, and the fourth mounting tube 340 are all on the same side in the thickness direction of the substrate 350. The first limiting ring 371 surrounds the second mounting tube 320 and the fourth mounting tube 340, the second limiting ring 372 surrounds the first limiting ring 371, and the first limiting ring 371 and the second limiting ring 372 are spaced apart from each other. The protruding length of the second limiting ring 372 relative to the substrate 350 can be greater than the protruding length of the first limiting ring 371 relative to the substrate 350. A second locking hole 3721 is formed in the second limiting ring 372, and the second locking hole 3721 penetrates the second limiting ring 372. During the installation of the bottle body 200, the bottle body 200 can be inserted into the space between the first limiting ring 371 and the second limiting ring 372, and the bottle body 200 cooperates with the second locking hole 3721, so that a snap connection relationship between the bottle body 200 and the second limiting ring 372 can be realized.

[0046] Refer to Figure 11 , Figure 12 and Figure 13, in some embodiments, the atomization mechanism 400 includes a nozzle 410 and a pre-pressure valve 420. The nozzle 410 is provided with a nozzle orifice 401. The pre-pressure valve 420 includes a valve seat 421 and a valve core 422. The valve core 422 has an elastic portion 4221. The elastic portion 4221 abuts against the valve seat 421 and encloses with the valve seat 421 two mutually isolated first chamber 4211b and second chamber 4211c. The first chamber 4211b is in communication with the nozzle orifice 401. When the pressure in the second chamber 4211c is greater than or equal to a preset value, the elastic portion 4221 disengages from the valve seat 421, causing the first chamber 4211b and the second chamber 4211c to communicate with each other.

[0047] Refer to Figure 11 , in some embodiments, the valve seat 421 is provided with a receiving cavity 4211a. The valve core 422 is received in the receiving cavity 4211a. The valve core 422 further includes a mounting portion 4223 and a connecting portion 4222. The mounting portion 4223 is fixedly connected to the valve seat 421, such that the mounting portion 4223 can provide a good sealing effect on the receiving cavity 4211a. The connecting portion 4222 is connected between the mounting portion 4223 and the elastic portion 4221. In the natural state, the cross-sectional dimension of the connecting portion 4222 is smaller than the cross-sectional dimensions of the mounting portion 4223 and the elastic portion 4221. The elastic portion 4221 can divide the receiving cavity 4211a into a first chamber 4211b and a second chamber 4211c. The valve seat 421 can be inserted into the second lumen 321. The valve seat 421 is snap-connected to the second mounting tube 320, such that the second chamber 4211c and the second lumen 321 are always in communication with each other. Obviously, when the pressure in the second chamber 4211c is less than the preset value, under the action of the self-elastic force of the elastic portion 4221, the elastic portion 4221 will abut against the inner wall surface of the receiving cavity 4211a, such that there is no gap between the elastic portion 4221 and the inner wall surface of the receiving cavity 4211a, thereby providing a good isolation effect on the first chamber 4211b and the second chamber 4211c and preventing the first chamber 4211b and the second chamber 4211c from communicating with each other. When the pressure in the second chamber 4211c is greater than or equal to the preset value, the elastic portion 4221 disengages from the valve seat 421, that is, the elastic portion 4221 disengages from the inner wall surface of the receiving cavity 4211a and there is a gap between the elastic portion 4221 and the inner wall surface, and the first chamber 4211b and the second chamber 4211c can communicate with each other through this gap.

[0048] Refer to Figure 12 , in some embodiments, the valve core 422 may further include reinforcing ribs 4224. The reinforcing ribs 4224 protrude from the connecting portion 4222. Both ends of the reinforcing ribs 4224 are respectively connected to the elastic portion 4221 and the mounting portion 4223. The number of the reinforcing ribs 4224 may be multiple. The multiple reinforcing ribs 4224 are arranged at intervals along the circumferential direction of the connecting portion 4222. By providing the reinforcing ribs 4224, the structural strength of the connecting portion 4222 and the entire valve core 422 can be reasonably improved.

[0049] Refer to Figure 13 , in some embodiments, the elastic part 4221 encloses an open cavity 4221a. The open cavity 4221a communicates with the first cavity 4211b. From one end of the open cavity 4221a close to the connecting part 4222 to the end far from the connecting part 4222, the caliber of the open cavity 4221a increases. In this way, the whole elastic part 4221 can be substantially in a horn shape. When the pressure in the second cavity 4211c is greater than or equal to a preset value, it can ensure that the elastic part 4221 quickly disengages from the valve seat 421 so that the first cavity 4211b and the second cavity 4211c communicate with each other. When the pressure in the second cavity 4211c is less than the preset value, it can also ensure that the elastic part 4221 quickly abuts against the valve seat 421 under the action of its own elasticity.

[0050] Refer to Figure 13 , in some embodiments, the valve seat 421 includes a seat body 4211, a sleeve 4212 and a limiting column 4213. The seat body 4211 encloses a receiving cavity 4211a. Both the sleeve 4212 and the limiting column 4213 protrude from the seat body 4211. The sleeve 4212 is arranged around the limiting column 4213. The sleeve 4212 is snap-connected to the nozzle 410. The limiting column 4213 is inserted into the nozzle 410. The sleeve 4212 and the limiting column 4213 are arranged at intervals, so that an annular cavity 4212a is formed between the sleeve 4212 and the limiting column 4213. The annular cavity 4212a can communicate with the spray orifice 401. A through hole 4211d is formed in the seat body 4211. The through hole 4211d can communicate the annular cavity 4212a and the first cavity 4211b. The liquid in the second cavity 4211c can be sprayed out from the spray orifice 401 through the first cavity 4211b, the through hole 4211d and the annular cavity 4212a in sequence.

[0051] Refer to Figure 13 and Figure 14, in some embodiments, the nozzle 410 includes a bottom plate 411, an outer sleeve ring 412, and an inner sleeve ring 413. The outer sleeve ring 412 and the inner sleeve ring 413 protrude from the bottom plate 411. The outer sleeve ring 412 surrounds the inner sleeve ring 413, and there is a gap between the outer sleeve ring 412 and the inner sleeve ring 413. The sleeve 4212 of the valve seat 421 can be inserted into the gap between the outer sleeve ring 412 and the inner sleeve ring 413, so that the outer sleeve ring 412 is snap-connected to the sleeve 4212 of the valve seat 421, thereby realizing the snap connection relationship between the entire valve seat 421 and the nozzle 410. The inner sleeve ring 413 and the bottom plate 411 enclose a communication cavity 4131, and the communication cavity 4131 can communicate with the first cavity 4211b through a through hole 4211d. The limiting post 4213 is inserted into the communication cavity 4131, so that the limiting post 4213 has a clearance fit with the communication cavity 4131, that is, there is a gap between the limiting post 4213 and the inner sleeve ring 413, and the liquid flowing out from the through hole 4211d can enter the gap between the limiting post 4213 and the inner sleeve ring 413.

[0052] Refer to Figure 14 , in some embodiments, the nozzle 410 further includes a first convex block 414. The first convex block 414 protrudes from the side wall surface of the communication cavity 4131. The number of the first convex blocks 414 is multiple, and the multiple first convex blocks 414 are arranged at intervals along the circumferential direction of the inner sleeve ring 413. The first convex blocks 414 surround the limiting post 4213 and abut against the first convex blocks 414 along the radial direction of the communication cavity 4131. It can be understood that the limiting post 4213 cooperates with the hole formed by the multiple first convex blocks 414. Through the action of the first convex block 414, the contact between the limiting post 4213 and the side wall surface of the communication cavity 4131 can be effectively avoided, ensuring a reasonable distance between the limiting post 4213 and the side wall surface of the communication cavity 4131, and then there is a gap between the limiting post 4213 and the inner sleeve ring 413.

[0053] Refer to Figure 14 , in some embodiments, the nozzle 410 further includes a second convex block 415. The second convex block 415 protrudes from the bottom wall surface of the communication cavity 4131. The number of the second convex blocks 415 is multiple, and the multiple second convex blocks 415 are arranged at intervals along the circumferential direction of the inner sleeve ring 413. The second convex block 415 abuts against the end of the limiting post 4213. Through the action of the second convex block 415, the contact between the limiting post 4213 and the bottom wall surface of the communication cavity 4131 can be effectively avoided, ensuring a reasonable distance between the limiting post 4213 and the bottom wall surface of the communication cavity 4131, and then there is a gap between the limiting post 4213 and the bottom wall surface of the communication cavity 4131, that is, there is a gap between the limiting post 4213 and the bottom plate 411.

[0054] Refer to Figure 14, in some embodiments, a first counterbore 4111 is recessed on the bottom wall surface of the communication cavity 4131, a second counterbore 4112 is recessed on the bottom wall surface of the first counterbore 4111, and the diameter of the first counterbore 4111 is larger than that of the second counterbore 4112, so that the first counterbore 4111 and the second counterbore 4112 together form a stepped hole. The second bump 415 is arranged around the first counterbore 4111, and a nozzle 401 is formed at one end of the second counterbore 4112 away from the first counterbore 4111. The second counterbore 4112 is a circular hole, and the number of the second counterbore 4112 is one or more.

[0055] Refer to Figure 11 and Figure 14 , during the working process, the liquid in the first cavity 4211b can enter the gap between the limiting post 4213 and the inner sleeve ring 413 through the through hole 4211d, that is, enter the communication cavity 4131. The liquid entering the communication cavity 4131 can then flow into the first counterbore 4111 from the gap between the limiting post 4213 and the substrate 350, and finally the liquid in the first counterbore 4111 flows into the second counterbore 4112 and is ejected from the nozzle 401.

[0056] Refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 , in some embodiments, the liquid pumping mechanism 500 includes a liquid pumping assembly 510 and a first elastic member 520. The liquid pumping assembly 510 is slidably connected to the main body mechanism 300 and encloses a liquid pumping cavity 301 with the main body mechanism 300. The first elastic member 520 is pressed between the liquid pumping assembly 510 and the main body mechanism 300. For example, the liquid pumping assembly 510 includes a button 511 and a first piston 512. The button 511 is received in the avoidance notch 111 of the housing 100. The button 511 can be slidably sleeved outside the first installation tube 310. The first elastic member 520 is in a sleeve shape and abuts against the button 511. The first piston 512 is fixedly connected to the button 511, and the first piston 512 is slidably matched with the first tube cavity 311, that is, the first piston 512 and the button 511 can slide relative to the first installation tube 310 synchronously. The first piston 512, the first installation tube 310 and the substrate 350 together enclose the liquid pumping cavity 301, and the first piston 512 seals the liquid pumping cavity 301. Obviously, the liquid pumping cavity 301 is part of the first tube cavity 311. When the first piston 512 moves closer to the control valve 700, the volume of the liquid pumping cavity 301 decreases. When the first piston 512 moves away from the control valve 700, the volume of the liquid pumping cavity 301 increases.

[0057] Refer to Figure 4 , Figure 5 , Figure 6 and Figure 7, in some embodiments, the button 511 has a first conical surface 5111, and the first elastic member 520 is sleeved outside the first conical surface 5111. When the button 511 moves closer to the control valve 700 and the liquid extraction chamber 301 decreases, the portion with a larger radius of the first conical surface 5111 will contact the first elastic member 520, causing the first conical surface 5111 to extrude the first elastic member 520 outward, so that the first elastic member 520 generates an outward expansion effect, thereby increasing the cross-sectional dimension of the first elastic member 520 and also enabling the first elastic member 520 to store energy. Conversely, when the first elastic member 520 releases energy, the cross-sectional dimension of the first elastic member 520 will decrease, causing the first elastic member 520 to contact the portion with a smaller radius on the first conical surface 5111, and then causing the first elastic member 520 to push the button 511 and the first piston 512 to move away from the control valve 700, and the volume of the liquid extraction chamber 301 increases.

[0058] Refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 , in some embodiments, the main body mechanism 300 has a second conical surface 380, and the structure of the second conical surface 380 is substantially similar to that of the first conical surface 5111. The first elastic member 520 is sleeved outside the second conical surface 380. When the button 511 moves closer to the control valve 700 and the liquid extraction chamber 301 decreases, the portion with a larger radius of the second conical surface 380 will contact the first elastic member 520, causing the second conical surface 380 to extrude the first elastic member 520 outward, so that the first elastic member 520 generates an outward expansion effect, thereby increasing the cross-sectional dimension of the first elastic member 520 and also enabling the first elastic member 520 to store energy. Conversely, when the first elastic member 520 releases energy, the cross-sectional dimension of the first elastic member 520 will decrease, causing the first elastic member 520 to contact the portion with a smaller radius on the second conical surface 380, and then causing the first elastic member 520 to push the button 511 and the first piston 512 to move away from the control valve 700, and the volume of the liquid extraction chamber 301 increases.

[0059] Refer to Figure 4 , Figure 5 , Figure 6 and Figure 7, in some embodiments, the liquid storage mechanism 600 includes a liquid storage component 610, a fixed seat 630, and a second elastic member 620. The fixed seat 630 is fixedly connected to the main body mechanism 300. The liquid storage component 610 is slidably connected to the main body mechanism 300 and encloses a liquid storage cavity 302 with the main body mechanism 300. The second elastic member 620 is pressed between the liquid storage component 610 and the fixed seat 630. For example, the fixed seat 630 can be arranged near the end of the third installation pipe 330 such that at least a part of the fixed seat 630 is received in the third pipe cavity 331. The second elastic member 620 can be generally in the shape of a sleeve 4212. The liquid storage component 610 includes a mounting seat 611 and a second piston 612. The second piston 612 can be fixedly sleeved outside the mounting seat 611. The second piston 612 is slidably engaged with the third pipe cavity 331, that is, the second piston 612 and the mounting seat 611 can slide relative to the third installation pipe 330 synchronously. The second elastic member 620 abuts against the mounting seat 611. The second piston 612, the third installation pipe 330, and the substrate 350 jointly enclose the liquid storage cavity 302, and the second piston 612 seals the liquid storage cavity 302. Obviously, the liquid storage cavity 302 is part of the third pipe cavity 331. When the second piston 612 moves closer to the control valve 700, the volume of the liquid storage cavity 302 decreases. When the second piston 612 moves away from the control valve 700, the volume of the liquid storage cavity 302 increases.

[0060] Refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 , in some embodiments, a sunk groove 6121 is formed on the second piston 612. The sunk groove 6121 is formed on the surface of the second piston 612 for defining the boundary of the liquid storage cavity 302. The sunk groove 6121 communicates with the liquid storage cavity 302, and the sunk groove 6121 can be in a closed-loop shape. When the liquid enters the liquid storage cavity 302, the liquid can also enter the sunk groove 6121, so that the sunk groove 6121 also plays a certain role in receiving the liquid.

[0061] Refer to Figure 4 , Figure 5 , Figure 6 and Figure 7, in some embodiments, the mounting seat 611 has a third conical surface 6111, and the second elastic member 620 is sleeved outside the third conical surface 6111. When the mounting seat 611 moves away from the control valve 700 and the liquid storage chamber 302 increases, the portion with a larger radius of the third conical surface 6111 will contact the second elastic member 620, causing the third conical surface 6111 to extrude the second elastic member 620 outward, so that the second elastic member 620 produces an outward expansion effect, thereby increasing the cross-sectional dimension of the second elastic member 620 and also enabling the second elastic member 620 to store energy. Conversely, when the second elastic member 620 releases energy, the cross-sectional dimension of the second elastic member 620 will decrease, causing the second elastic member 620 to contact the portion with a smaller radius on the third conical surface 6111, and then causing the second elastic member 620 to push the mounting seat 611 and the second piston 612 to move closer to the control valve 700, reducing the volume of the liquid extraction chamber 301.

[0062] Refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 , in some embodiments, the fixed seat 630 has a fourth conical surface 631, and the second elastic member 620 is sleeved outside the fourth conical surface 631. When the mounting seat 611 moves away from the control valve 700 and the liquid storage chamber 302 increases, the portion with a larger radius of the fourth conical surface 631 will contact the second elastic member 620, causing the fourth conical surface 631 to extrude the second elastic member 620 outward, so that the second elastic member 620 produces an outward expansion effect, thereby increasing the cross-sectional dimension of the second elastic member 620 and also enabling the second elastic member 620 to store energy. Conversely, when the second elastic member 620 releases energy, the cross-sectional dimension of the second elastic member 620 will decrease, causing the second elastic member 620 to contact the portion with a smaller radius on the fourth conical surface 631, and then causing the second elastic member 620 to push the mounting seat 611 and the second piston 612 to move closer to the control valve 700, reducing the volume of the liquid extraction chamber 301.

[0063] In some embodiments, all the components of the entire medical atomization device 10 can be made of plastic materials, which can reduce the material cost of the medical atomization device 10 and thus reduce the manufacturing cost of the medical atomization device 10.

[0064] Refer to Figure 4 , Figure 5 , Figure 6 and Figure 7, in some embodiments, the control valve 700 has a liquid extraction hole 710 and a liquid storage hole 720. The liquid extraction hole 710 is located between the liquid extraction chamber 301 and the liquid guiding chamber 303, and the liquid storage hole 720 is located between the liquid extraction chamber 301 and the liquid storage chamber 302. When the button 511 moves closer to the control valve 700 and the liquid extraction chamber 301 decreases, the pressure in the liquid extraction chamber 301 increases, causing the liquid extraction hole 710 to close and the liquid storage hole 720 to open. Therefore, the liquid or gas in the liquid extraction chamber 301 can enter the liquid storage chamber 302 through the liquid storage hole 720, and the liquid or gas in the liquid extraction chamber 301 cannot enter the liquid guiding chamber 303 through the liquid extraction hole 710. When the first elastic member 520 pushes the button 511 to move away from the control valve 700, the pressure in the liquid extraction chamber 301 decreases, causing the liquid extraction hole 710 to open and the liquid storage hole 720 to close. Under the action of the gas pressure in the liquid storage chamber 210, the liquid in the liquid storage chamber 210 can enter the liquid guiding chamber 303 through the suction pipe 800, and then enter the liquid extraction chamber 301 through the liquid extraction hole 710, while the liquid in the liquid storage chamber 302 cannot enter the liquid extraction chamber 301 through the liquid storage hole 720.

[0065] Refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 , the working principle of the medical atomization device 10 is introduced below:

[0066] In the first step, in the initial state, there may be no liquid in both the liquid extraction chamber 301 and the liquid storage chamber 302. By applying a pressing force to the button 511 and the first piston 512, the first piston 512 moves closer to the control valve 700 against the elastic force of the first elastic member 520, and then the liquid extraction chamber 301 decreases. At this time, the liquid extraction hole 710 closes and the liquid storage hole 720 opens. The gas in the liquid extraction chamber 301 enters the liquid storage chamber 302 through the liquid storage hole 720, and then is discharged from the liquid storage chamber 302 through the second lumen 321, the second chamber 4211c, the first chamber 4211b, the through hole 4211d, the annular chamber 4212a, the communication chamber 4131, the first sink 4111, and the nozzle 401 of the second sink 4112 in sequence. Figure 6 The dotted arrows in

[0067] represent the flow trajectory of the liquid.

[0068] In the third step, continue to apply a pressing force to the button 511 and the first piston 512, so that the first piston 512 moves closer to the control valve 700 against the elastic force of the first elastic member 520. Subsequently, the liquid extraction chamber 301 decreases. At this time, the liquid extraction hole 710 is closed and the liquid storage hole 720 is opened. The gas in the liquid extraction chamber 301 enters the liquid storage chamber 302 through the liquid storage hole 720, causing the liquid in the liquid storage chamber 302 to push the second piston 612 and the mounting seat 611 to move closer to the fixed seat 630 against the elastic force of the second elastic member 620, and the volume of the liquid storage chamber 302 increases. Of course, in the case of a large amount of liquid, the liquid in the liquid storage chamber 302 can also enter the second chamber 4211c. Given that the hydraulic pressure formed by the liquid in the liquid storage chamber 302 and the second chamber 4211c is too small to push the elastic portion 4221 of the valve core 422 away from the valve seat 421, that is, the elastic portion 4221 still abuts against the valve seat 421, so that the first chamber 4211b and the second chamber 4211c are isolated from each other, and the liquid in the second chamber 4211c cannot enter the first chamber 4211b.

[0069] In the fourth step, the button 511 can be repeatedly pressed multiple times, which will cause more liquid in the liquid storage chamber 210 to enter the liquid storage chamber 302 through the liquid extraction chamber 301. As the amount of liquid in the liquid storage chamber 302 and the second chamber 4211c increases, the liquid pressure formed by the liquid in the liquid storage chamber 302 and the second chamber 4211c gradually increases. When the liquid pressure in the liquid storage chamber 302 and the second chamber 4211c is greater than or equal to the preset value, the elastic portion 4221 of the valve core 422 will be separated from the valve seat 421 under the action of the liquid pressure, enabling the first chamber 4211b and the second chamber 4211c to communicate with each other. Subsequently, the liquid in the liquid storage chamber 302 is sprayed to the outside through the second chamber 4211c, the first chamber 4211b, the through hole 4211d, the annular chamber 4212a, the communication chamber 4131, the first counterbore 4111, and the nozzle 401 of the second counterbore 4112, thereby realizing the spraying of the liquid by the medical atomization device 10.

[0070] After the nozzle 401 starts spraying, stop pressing the button 511. At this time, the second elastic member 620 will release energy, and the second elastic member 620 will push the second piston 612 and the mounting seat 611 to move away from the fixed seat 630, thereby reducing the liquid storage chamber 302, reasonably increasing the pressure of the liquid in the liquid storage chamber 302, and enabling the liquid in the liquid storage chamber 302 to continuously pass through the nozzle 401 for spraying. It can be understood that as the continuous spraying progresses, the liquid volume in the liquid storage chamber 302 and the second chamber 4211c decreases. When the liquid pressure formed by the liquid in the liquid storage chamber 302 and the second chamber 4211c is less than the preset value, the elastic portion 4221 of the valve core 422 will abut against the valve seat 421 under the action of its own elastic force, thereby isolating the first chamber 4211b and the second chamber 4211c from each other, and the liquid in the second chamber 4211c cannot enter the first chamber 4211b and spray out from the nozzle 401. At this time, the medical atomization device 10 will stop spraying.

[0071] If a mode of setting high pressure in the medical atomization device 10 to spray the liquid is adopted, since the gas in the medical atomization device 10 will be higher than the atmospheric pressure, the medical atomization device 10 needs to have a relatively high mechanical strength to withstand the internal high pressure. In this way, the housing 100 of the medical atomization device 10 will be made of a metal material with a relatively high strength, thereby increasing the material cost and manufacturing cost of the medical atomization device 10. Other components such as the button 511 of the medical atomization device 10 can be made of plastic materials. Therefore, some components of the medical atomization device 10 are made of plastic materials, while some other components are made of metal materials. During the process of recycling the discarded medical atomization device 10, due to the different materials of the components, it is necessary to sort the metal components and plastic components, thereby increasing the workload of recycling and the recycling cost. At the same time, when the spraying stops, there will be liquid dripping at the nozzle 401.

[0072] For the medical atomization device 10 in the above embodiments, only by pressing the liquid extraction assembly 510 and under the action of the control valve 700 and the liquid storage mechanism 600, the atomization mechanism 400 can continuously spray the liquid. In this way, there is no need to store a certain high pressure in the medical atomization device 10, thereby reducing the requirement for the strength of the housing 100. As a result, the housing 100 and other components of the medical atomization device 10 can all be made of plastic materials, thus reducing the material cost and manufacturing cost of the medical atomization device 10. Given that all components of the medical atomization device 10 can be made of plastic materials, during the process of recycling the discarded medical atomization device 10, there is no need to sort the components according to different materials, thereby improving the convenience of recycling and reducing the recycling cost. At the same time, when the pressure in the liquid storage chamber 302 is less than the preset value, the elastic portion 4221 of the valve core 422 will abut against the valve seat 421 under the action of its own elastic force, so that the first chamber 4211b and the second chamber 4211c are isolated from each other, and the liquid in the liquid storage chamber 302 and the second chamber 4211c cannot enter the first chamber 4211b and the spraying stops. Therefore, after the medical atomization device 10 stops spraying, the liquid cannot enter the first chamber 4211b and cause dripping at the spray nozzle 401. Thus, the dripping phenomenon at the spray nozzle 401 after the medical atomization device 10 stops spraying can be eliminated.

[0073] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0074] The above embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An atomization mechanism of a medical atomization device, characterized in that Comprising: A nozzle provided with a spray orifice; and A pre-pressure valve including a valve seat and a valve core. The valve core includes an elastic portion which abuts against the valve seat and encloses with the valve seat a first chamber and a second chamber that are isolated from each other. The first chamber is in communication with the spray orifice. When the pressure in the second chamber is greater than or equal to a preset value, the elastic portion disengages from the valve seat to cause the first chamber and the second chamber to communicate with each other.

2. The atomizing mechanism according to claim 1, wherein, The valve seat is provided with a receiving cavity, and the valve core is received in the receiving cavity. The valve core further includes a mounting portion and a connecting portion. The mounting portion is fixedly connected to the valve seat, and the connecting portion is connected between the mounting portion and the elastic portion. The elastic portion can divide the receiving cavity to form the first chamber and the second chamber; in a natural state, the cross-sectional dimension of the connecting portion is smaller than the cross-sectional dimensions of the mounting portion and the elastic portion.

3. The atomizing mechanism according to claim 2, wherein, The valve core further includes a reinforcing rib which protrudes from the connecting portion, and two ends of the reinforcing rib are respectively connected to the elastic portion and the mounting portion.

4. The atomization mechanism according to claim 2, characterized in that, The elastic portion encloses an open cavity which is in communication with the first chamber. From one end of the open cavity close to the connecting portion to the end far from the connecting portion, the diameter of the open cavity increases.

5. The atomization mechanism according to claim 2, characterized in that The valve seat includes a seat body, a sleeve and a limiting post. The seat body encloses the receiving cavity. The sleeve and the limiting post both protrude from the seat body. The sleeve surrounds the limiting post. The sleeve is snap-connected to the nozzle, and the limiting post is inserted into the nozzle. An annular cavity communicating with the spray orifice is formed between the sleeve and the limiting post. A through hole communicating the first chamber and the annular cavity is formed in the seat body.

6. The atomizing mechanism according to claim 1, characterized in that The nozzle includes a bottom plate, an outer sleeve ring and an inner sleeve ring. The outer sleeve ring and the inner sleeve ring protrude from the bottom plate. The outer sleeve ring surrounds the inner sleeve ring. The outer sleeve ring is snap-connected to the valve seat. The inner sleeve ring and the bottom plate enclose a communication cavity communicating the spray orifice and the first chamber. The communication cavity is in clearance fit with the valve seat.

7. The atomizing mechanism according to claim 6, characterized in that The nozzle further includes a first convex block which protrudes from a side wall surface of the communication cavity. The number of the first convex blocks is multiple, and the multiple first convex blocks are arranged at intervals along the circumferential direction of the inner sleeve ring. The first convex blocks surround the valve seat and abut against the valve seat.

8. The atomizing mechanism according to claim 6, characterized in that, The nozzle further includes a second convex block which protrudes from a bottom wall surface of the communication cavity. The number of the second convex blocks is multiple, and the multiple second convex blocks are arranged at intervals along the circumferential direction of the inner sleeve ring. The second convex blocks abut against an end portion of the valve seat.

9. The atomizing mechanism according to claim 8, wherein, A first counterbore is recessed in a bottom wall surface of the communication cavity, and a second counterbore is recessed in a bottom wall surface of the first counterbore. The diameter of the first counterbore is larger than that of the second counterbore. The second convex blocks surround the first counterbore, and the spray orifice is formed at one end of the second counterbore far from the first counterbore.

10. The atomization mechanism according to claim 9, characterized in that, The second counterbore is a circular hole, and the number of the second counterbores is one or more.

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