A spray pump

Abstract

The present application belongs to the technical field of spraying appliances, in particular to a spraying pump, comprising a connecting cover connected with a liquid storage bottle at the lower end, a pump assembly is arranged through the connecting cover, the pump assembly comprises a pump body, a piston rod, a liquid outlet rod and a non-metal spring, the lower end of the pump body is provided with a pump cavity, and the upper end is fixed by a filter plug fixedly connected with the connecting cover, the non-metal spring is provided with an air inlet hole, an air inlet channel one is arranged between the non-metal spring and the piston rod, an air inlet channel two is arranged between the piston rod and the filter plug, the pump body is provided with a micropore communicating the air inlet channel two and the pump cavity, when the liquid outlet rod moves downward, the liquid in the pump cavity is discharged through the liquid outlet rod, and air enters the pump cavity through the air inlet hole, the air inlet channel one, the air inlet channel two and the micropore; after the liquid outlet rod resets, the liquid outlet rod stops discharging liquid, and the piston rod disconnects the communication channel of the air inlet channel two and the micropore. The present application is convenient for recycling and does not affect the liquid, and can effectively filter microorganisms and dust in the air and delay the deterioration of the liquid in the pump cavity.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of spray devices, and particularly relates to a spray pump. BACKGROUND

[0002] The spray pump is a device for converting liquid into mist, and is usually used in combination with a bottle containing liquid. The spray pump can atomize and spray the liquid, and has good application in the medical, cosmetic, and agricultural industries.

[0003] Chinese patent CN 208790315 U discloses a spray bottle, which comprises a pump body cover, the pump body cover comprises a conduit extending along the axial direction thereof, the pump body cover is provided with a first liquid outlet, a second liquid outlet and a third liquid outlet which are connected in sequence from the center to the outside in the radial direction, the first liquid outlet is connected with the conduit, the diameter of the first liquid outlet is smaller than that of the second liquid outlet, and the diameter of the third liquid outlet is smaller than that of the first liquid outlet, a pump body provided in a bottle body of the spray bottle, the pump body can supply liquid in the bottle body to the conduit, the pump body has a valve rod capable of moving up and down to control the communication or isolation of the conduit and a liquid inlet of the pump body, the pump body cover is connected with the bottle body through a first connecting piece, the pump body is connected with the bottle body through a second connecting piece, and the first connecting piece is located above the second connecting piece. A hollow shell, an inner shell capable of moving up and down in the shell, the inner shell comprising a cylindrical portion and a convex ring provided on the outer wall of the cylindrical portion, the convex ring being provided above the valve rod, wherein the gap between the valve rod and the inner shell forms a fluid channel, the valve rod is connected with the inner wall of the inner shell through a connecting ring, a through hole is formed in the connecting ring, a plurality of elastic members are annularly arranged on the outer wall of the cylindrical portion, and the elastic members are arranged below the convex ring. The lower end of the valve rod extends to the outside of the inner shell, a spring is arranged at the lower end of the valve rod, the lower part of the spring is provided with a ball located in the shell, the lower opening of the shell is connected with the inner cavity of the bottle body through a suction tube, and the diameter of the ball is greater than that of the suction tube. The pump body cover comprises a pressing portion capable of moving up and down, and the lower end of the pressing portion abuts against or is arranged adjacent to the upper end of the inner shell. The elastic member is a return spring. As shown in the accompanying drawings, the return spring and the spring are metal springs.

[0004] The above-mentioned return spring and spring will contact the liquid, and the metal material will react with the liquid, thereby affecting the liquid. Moreover, the metal material is not convenient for recycling of the spray pump. In order to balance the air pressure inside and outside the bottle body and easily extract the liquid in the bottle body, air is usually introduced into the bottle body at the same time as the liquid is discharged. The above-mentioned spray bottle does not have a device for filtering air, and the unfiltered air entering the bottle will contaminate the liquid in the bottle. SUMMARY

[0005] The present application aims to provide a spray pump which is convenient for recycling, does not affect the liquid, effectively filters the microorganism and dust in the air, and delays the deterioration of the liquid in the pump cavity.

[0006] The present application is implemented as follows:

[0007] A spray pump comprises a connecting cap connected with a liquid storage bottle at the lower end, a pump assembly is arranged through the connecting cap, the pump assembly comprises a pump body extended into the liquid storage bottle at the lower end, a piston rod slidably arranged in the pump body at the lower end, a liquid outlet rod slidably arranged in the piston rod at the lower end, a non-metal spring sleeved on the piston rod to reset the liquid outlet rod, the pump body is provided with a pump cavity at the lower end and is fixed by a filter plug at the upper end, the filter plug is sleeved on the piston rod and is fixedly connected with the connecting cap, the non-metal spring is provided with an air inlet hole, an air inlet channel one is arranged between the non-metal spring and the piston rod to communicate with the air inlet hole, an air inlet channel two is arranged between the piston rod and the filter plug to communicate with the air inlet channel one, the pump body is provided with a micropore to communicate the air inlet channel two and the pump cavity, when the liquid outlet rod moves downward, the liquid in the pump cavity is discharged through the liquid outlet rod, and the air enters the pump cavity through the air inlet hole, the air inlet channel one, the air inlet channel two and the micropore; after the liquid outlet rod is reset, the liquid outlet rod stops discharging liquid, and the piston rod disconnects the communication channel between the air inlet channel two and the micropore.

[0008] In the spray pump, the micropore comprises a micropore one formed by the lower concave upper end surface of the pump body and the filter plug, and a micropore two formed by the inner concave lateral wall of the pump body and the filter plug, one end of the micropore one communicates with the air inlet channel two, the other end of the micropore one communicates with one end of the micropore two, and the other end of the micropore two communicates with the pump cavity.

[0009] In the spray pump, the micropore has a pore diameter less than 0.2 microns.

[0010] In the spray pump, the micropore is provided with a plurality of micropores.

[0011] In the spray pump, a movable rod is slidably arranged in the piston rod and extended out of the piston rod at the upper end, the upper end of the movable rod is fixedly connected with the liquid outlet rod in the axial direction and is provided with a liquid outlet channel one between the movable rod and the liquid outlet rod, the piston rod and the movable rod are provided with a liquid outlet channel two to communicate the liquid outlet channel one and the pump cavity, when the liquid outlet rod moves downward, the movable rod is driven to move downward, and the liquid in the pump cavity is discharged through the liquid outlet channel two and the liquid outlet channel one; after the liquid outlet rod is reset, the piston rod disconnects the communication channel between the liquid outlet channel two and the pump cavity.

[0012] In the spray pump, the piston rod is provided with an axial groove, the axial groove and the liquid outlet rod form the liquid outlet channel one, and the axial groove and the piston rod form the liquid outlet channel two.

[0013] In the spray pump, the piston rod comprises a rod part at the upper end and a sealing part connected to the lower end of the rod part, the sealing part comprises an inner sealing lip for forming a conical seal with the movable rod, an outer sealing lip for abutting against the inner wall of the pump body, and a connecting part connecting the inner sealing lip and the outer sealing lip, the inner hole wall of the filter plug extends along the axis to form a sealing cylinder, the upper end surface of the connecting part is concave to form a sealing groove matched with the sealing cylinder, the micro holes are arranged on the side wall opposite to the sealing cylinder, and the communication passage between the second air inlet channel and the micro holes is disconnected when the sealing cylinder abuts against the sealing groove, and the communication passage between the second air inlet channel and the micro holes is communicated when the sealing cylinder does not abut against the sealing groove, and the communication passage between the second air inlet channel and the micro holes comprises the gap between the lower end surface of the sealing cylinder and the inner end surface of the sealing groove, the gap between the outer side wall of the sealing cylinder and the side wall of the sealing groove, and the gap between the outer side wall of the sealing cylinder and the pump body.

[0014] In the spray pump, the liquid outlet rod is provided with an annular convex edge abutting against the rod part for limiting, the lower end of the movable rod is provided with a limiting protrusion protruding from the piston rod and abutting against the sealing part for limiting, and the annular convex edge and the limiting protrusion limit the sliding range of the piston rod relative to the movable rod.

[0015] In the spray pump, the limiting protrusion is annular for better abutting against the outer sealing lip for limiting, and a plurality of through holes are arranged on the limiting protrusion for connecting the second liquid outlet channel and the pump cavity.

[0016] In the spray pump, one end of the non-metal spring is connected to the annular convex edge, and the other end of the non-metal spring is connected to the filter plug.

[0017] In the spray pump, the outer sealing lip is arranged in two and arranged on the upper and lower sides of the connecting part respectively, and the limiting protrusion abuts against the outer sealing lip on the lower side for limiting.

[0018] In the spray pump, the lower end of the liquid outlet rod is slidably arranged in the rod part, the rod part protrudes inwardly to form a sealing protrusion for sealing the rod part and the liquid outlet rod, the liquid in the second liquid outlet channel is prevented from leaking through the gap between the rod part and the liquid outlet rod, and further liquid leakage is caused; the side wall of the movable rod is provided with an annular groove, the inner side wall of the liquid outlet rod protrudes inwardly to form an annular protrusion matched with the annular groove, and the movable rod is axially fixedly connected with the liquid outlet rod by being clamped in the annular groove through the annular protrusion.

[0019] In the spray pump, the upper end of the pump body is provided with a clamping hook, the filter plug is provided with a clamping groove matched with the clamping hook, and the pump body is fixedly connected with the filter plug by being clamped in the clamping groove through the clamping hook.

[0020] In the spray pump, a pressing cap is arranged on the liquid outlet rod, and a spray channel is arranged on the pressing cap and communicated with the liquid outlet channel.

[0021] In the spray pump, the non-metal spring can be a plastic spring or a silica gel spring.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] 1. The non-metal spring is used to reset the liquid outlet rod, and the non-metal material is convenient for recycling of the spray pump, and the non-metal spring is sleeved on the piston rod and does not contact the liquid, so that the liquid is not affected.

[0024] 2. The micro-holes include a micro-hole one formed by the lower concave of the upper end surface of the pump body and the filter plug, and a micro-hole two formed by the inner concave of the outer lateral wall of the pump body and the filter plug, one end of the micro-hole one is communicated with the air inlet channel two, the other end of the micro-hole one is communicated with one end of the micro-hole two, the other end of the micro-hole two is communicated with the pump cavity, and air enters the pump cavity through the micro-hole one and the micro-hole two, so that the filtering effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a perspective view of the present application;

[0026] Figure 2 is a sectional view of the sealing state of the present application;

[0027] Figure 3 is a sectional view of the liquid outlet state of the present application;

[0028] Figure 4 is an exploded view of the present application.

[0029] Reference signs: 1, connecting cover; 2, pump body; 3, piston rod; 4, liquid outlet rod; 5, non-metal spring; 6, pump cavity; 7, filter plug; 8, air inlet hole; 9, air inlet channel I; 10, air inlet channel II; 11, micro hole; 12, micro hole I; 13, micro hole II; 14, movable rod; 15, liquid outlet channel I; 16, liquid outlet channel II; 17, rod part; 18, inner sealing lip; 19, outer sealing lip; 20, connecting part; 21, sealing cylinder; 22, sealing groove; 23, annular convex edge; 24, limiting convex block; 25, sealing convex; 26, annular groove; 27, annular convex; 28, clamping hook; 29, clamping groove; 30, pressing cap; 31, liquid spraying channel; 32, guide convex. DETAILED DESCRIPTION

[0030] The application will be further described in the following specific embodiments, referring to Figure 1 -4:

[0031] A spray pump comprises a connecting cover 1 connected with a liquid storage bottle at the lower end, a pump assembly is arranged through the connecting cover 1, the pump assembly comprises a pump body 2 extending into the liquid storage bottle at the lower end, a piston rod 3 slidingly arranged in the pump body 2 at the lower end, a liquid outlet rod 4 slidingly arranged in the piston rod 3 at the lower end, a non-metal spring 5 sleeved on the piston rod 3 to reset the liquid outlet rod 4, the pump body 2 is provided with a pump cavity 6 at the lower end and is fixed by a filter plug 7 at the upper end, the non-metal spring 5 is provided with an air inlet hole 8, the non-metal spring 5 and the piston rod 3 are provided with an air inlet channel I 9 communicating with the air inlet hole 8, the piston rod 3 and the filter plug 7 are provided with an air inlet channel II 10 communicating with the air inlet channel I 9, the pump body 2 is provided with a micro hole 11 communicating with the air inlet channel II 10 and the pump cavity 6, when the liquid outlet rod 4 moves downward, the liquid in the pump cavity 6 is discharged through the liquid outlet rod 4, and the air enters the pump cavity 6 through the air inlet hole 8, the air inlet channel I 9, the air inlet channel II 10 and the micro hole 11 to balance the air pressure inside and outside the liquid storage bottle; after the liquid outlet rod 4 is reset, the liquid outlet rod 4 stops discharging, and the piston rod 3 disconnects the communication channel between the air inlet channel II 10 and the micro hole 11.

[0032] The working principle of the application is as shown in Figures 1-3 the drawing, when the liquid outlet rod 4 moves downward, the liquid in the pump cavity 6 is discharged through the liquid outlet rod 4, and the air enters the pump cavity 6 through the air inlet hole 8, the air inlet channel I 9, the air inlet channel II 10 and the micro hole 11 to balance the air pressure inside and outside the liquid storage bottle; after the liquid outlet rod 4 is reset, the liquid outlet rod 4 stops discharging, and the piston rod 3 disconnects the communication channel between the air inlet channel II 10 and the micro hole 11.

[0033] This invention uses a non-metallic spring 5 to reset the liquid outlet rod 4. The absence of metal material facilitates the recycling of the spray pump, and the spring is fitted outside the piston rod 3, so it does not come into contact with the liquid and will not affect the liquid. At the same time, the air of this invention enters the pump chamber 6 through the first air intake channel 9, the second air intake channel 10, and the micropores 11. Microorganisms and dust in the air will be adsorbed on the inner wall of the filter plug 7, which will filter the air. Meanwhile, the micropores 11 further filter the microorganisms in the air, thereby preventing the liquid in the pump chamber 6 from coming into contact with microorganisms and dust and delaying the deterioration of the liquid in the pump chamber 6.

[0034] In this embodiment, the filter plug 7 is made of PE.

[0035] The structure of micropore 11: as follows Figure 2 As shown, the micropores 11 include a first micropore 12 formed by the recessed upper surface of the pump body 2 and the filter plug 7, and a second micropore 13 formed by the recessed outer wall of the pump body 2 and the filter plug 7. One end of the first micropore 12 is connected to the second air intake channel 10, and the other end is connected to one end of the second micropore 13. The other end of the second micropore 13 is connected to the pump chamber 6. Air enters the pump chamber 6 through the first micropore 12 and the second micropore 13, resulting in better filtration.

[0036] Preferably, the pore size of the micropore 11 is less than 0.2 micrometers, which effectively prevents microorganisms from entering the pump chamber 6.

[0037] To prevent the micropores 11 from becoming clogged and preventing air from entering, multiple micropores 11 are provided.

[0038] In this embodiment, the appendix Figure 3 The direction of the middle arrow indicates the direction of liquid discharge.

[0039] Liquid outlet structure: such as Figure 2 , 3 As shown, a movable rod 14, with its upper end extending out of the piston rod 3, is slidably provided inside the piston rod 3. The upper end of the movable rod 14 is axially fixedly connected to the liquid outlet rod 4, and a liquid outlet channel 15 is provided between the movable rod 14 and the liquid outlet rod 4. A second liquid outlet channel 16 is provided between the piston rod 3 and the movable rod 14, connecting the first liquid outlet channel 15 and the pump chamber 6. When the liquid outlet rod 4 moves down, it drives the movable rod 14 to move down, squeezing the pump chamber 6. The liquid in the pump chamber 6 is discharged through the second liquid outlet channel 16 and the first liquid outlet channel 15. After the liquid outlet rod 4 is reset, the piston rod 3 disconnects the communication channel between the second liquid outlet channel 16 and the pump chamber 6.

[0040] To increase the output volume: such as Figures 2-4 As shown, the piston rod 3 is provided with an axial groove 33, which forms a liquid outlet channel 15 with the liquid outlet rod 4, and a liquid outlet channel 16 with the piston rod 14. In this embodiment, four axial grooves 33 are evenly distributed around the circumference.

[0041] The structure of the piston rod disconnecting the communication channel between the second air inlet channel 10 and the micropore: the piston rod 3 comprises a rod part 17 at the upper end and a sealing part connected to the lower end of the rod part 17, the sealing part comprises an inner sealing lip 18 forming a conical seal with the movable rod 14, an outer sealing lip 19 abutting against the inner wall of the pump body 2, and a connecting part 20 connecting the inner sealing lip 18 and the outer sealing lip 19, the inner hole wall of the filter plug 7 extends downward along its axis to form a sealing cylinder 21, the upper end surface of the connecting part 20 is concave to form a sealing groove 22 matched with the sealing cylinder 21, the micropore 11 is arranged on the side wall of the pump body 2 opposite to the sealing cylinder 21, when the sealing cylinder 21 abuts against the sealing groove 22, the communication channel between the second air inlet channel 10 and the micropore 11 is disconnected; when the sealing cylinder 21 does not abut against the sealing groove 22, the communication channel between the second air inlet channel 10 and the micropore 11 is connected, the communication channel between the second air inlet channel 10 and the micropore 11 comprises the gap between the lower end surface of the sealing cylinder 21 and the inner end surface of the sealing groove 22, the gap between the outer side wall of the sealing cylinder 21 and the side wall of the sealing groove 22, and the gap between the outer side wall of the sealing cylinder 21 and the pump body 2.

[0042] The outer sealing lip 19 of the present application effectively seals the sealing groove 22 and the pump cavity 6, preventing the liquid in the pump cavity 6 from flowing into the sealing groove 22, and preventing the air in the second air inlet channel 10 from directly entering the pump cavity 6 without being filtered by the micropore 11.

[0043] Furthermore, the liquid outlet rod 4 is provided with an annular convex edge 23 abutting against the rod part 17 for limiting, the lower end of the movable rod 14 is provided with a limiting protrusion 24 protruding from the piston rod 3 and abutting against the sealing part for limiting, the annular convex edge 23 and the limiting protrusion 24 limit the sliding range of the piston rod 3 relative to the movable rod 14.

[0044] Pressing down the discharge rod 4 causes it to move downwards, which in turn moves the movable rod 14 downwards. Due to the friction between the piston rod 3 and the pump body 2, the piston rod 3 will not move temporarily. At this time, the movable rod 14 moves downwards relative to the piston rod 3, and the inner sealing lip 18 does not contact the movable rod 14 to seal. The connection between the discharge channel 2 16 and the pump chamber 6 is opened, and the liquid in the pump chamber 6 is discharged through the discharge channel 2 16 and the discharge channel 1 15. The discharge rod 3 continues to move downwards, further moving the movable rod 14 downwards until the rod part 17 contacts the annular protrusion 23, causing the piston rod 3 to move downwards. The sealing cylinder 21 does not contact the sealing groove 22 to seal, and the connection between the air inlet channel 2 10 and the micropore 11 is opened. Air is released through the air inlet hole 8, the air inlet channel 1 9, and the air inlet... Channel 2 10 and micro-hole 11 enter the pump chamber 6 to balance the air pressure inside and outside the storage bottle. After the dispensing rod 4 is stopped, it returns to its original position under the action of the non-metallic spring 5, causing the movable rod 14 to move upward. Due to the friction between the piston rod 3 and the pump body 2, the piston rod 3 will not move temporarily. The movable rod 14 moves upward relative to the piston rod 4, and the inner sealing lip 18 abuts against the movable rod 14 to seal. The connection between the dispensing channel 2 16 and the pump chamber 6 is broken, and no liquid can be dispensed. The dispensing rod 4 continues to move upward, further driving the movable rod 14 upward until the limiting protrusion 24 abuts against the sealing part, causing the piston rod 3 to move upward. The sealing cylinder 21 abuts against the sealing groove 22 to seal, and the connection between the air intake channel 2 10 and the micro-hole 11 is broken, and no air can be introduced.

[0045] As the piston rod 3 and the movable rod 14 move upward, the liquid in the storage bottle is drawn into the pump chamber 6.

[0046] To better engage with the outer sealing lip 19, the limiting protrusion 24 is annular. To increase the flow rate of liquid entering the second outlet channel 16 from the pump chamber 6, the limiting protrusion 24 is provided with several through holes connecting the second outlet channel 16 and the pump chamber 6. In this embodiment, three through holes are provided along the axial direction.

[0047] Mounting structure of non-metallic spring 5: as follows Figure 2 , 3 As shown, one end of the non-metallic spring 5 is connected to the annular protrusion 23, and the other end is connected to the filter plug 7.

[0048] For better sealing effect, there are two outer sealing lips 19, which are respectively located on the upper and lower sides of the connecting part 20. The limiting protrusion 24 abuts against and limits the lower outer sealing lip 19.

[0049] Further, the lower end of the liquid outlet rod 4 is slidably arranged in the rod portion 17, and the rod portion 17 is inwardly protruded with a sealing protrusion 25 for sealing the rod portion 17 and the liquid outlet rod 4, so as to prevent the liquid in the second liquid outlet channel 16 from leaking through the gap between the rod portion 17 and the liquid outlet rod 4; the side wall of the movable rod 14 is provided with an annular groove 26, and the inner side wall of the liquid outlet rod 4 is inwardly protruded with an annular protrusion 27 matched with the annular groove 26, and the movable rod 14 is axially fixedly connected with the liquid outlet rod 4 by being clamped in the annular groove 26 through the annular protrusion 27.

[0050] The fixed structure of the pump body 2: the upper end of the pump body 2 is provided with a clamping hook 28, and the filter plug 7 is provided with a clamping groove 29 matched with the clamping hook 28, and the pump body 2 is fixedly connected with the filter plug 7 by being clamped in the clamping groove 29 through the clamping hook 28.

[0051] In the embodiment, the first micro hole 12 is formed by the lower concave upper end surface of the clamping hook 28 and the inner end surface of the clamping groove 29, and the second micro hole 13 is formed by the inwardly concave side wall of the clamping hook 28 and the side wall of the clamping groove 29.

[0052] In order to facilitate pressing the liquid outlet rod 4, a pressing cap 30 is arranged on the liquid outlet rod 4, the pressing cap 30 is provided with a liquid spraying channel 31 communicated with the first liquid outlet channel 15, the liquid spraying channel 31 is provided with a spraying piece, and the liquid is sprayed after being atomized by the spraying piece, the connecting cover 1 is upwardly protruded with a guide protrusion 32 for guiding the upward and downward movement of the pressing cap 30, and the pressing cap 30 is slidably arranged in the guide protrusion 32.

[0053] Further, the non-metallic spring 5 can be a plastic spring or a silica gel spring. In the embodiment, the non-metallic spring 5 is a plastic spring.

[0054] The above embodiment is only one of the preferred embodiments of the present application, and does not limit the scope of the present application, so that: any equivalent changes made according to the shape, structure and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A spray pump, characterized in that: The system includes a connecting cap (1) that connects to a storage bottle at its lower end. A pump assembly is installed through the connecting cap (1). The pump assembly includes a pump body (2) that extends into the storage bottle at its lower end, a piston rod (3) that slides inside the pump body (2) at its lower end, an outlet rod (4) that slides inside the piston rod (3) at its lower end, and a non-metallic spring (5) that resets the outlet rod (4) on the piston rod (3). The pump body (2) has a pump chamber (6) at its lower end and is fixed at its upper end by a filter plug (7) that is fitted on the piston rod (3) and fixedly connected to the connecting cap (1). The non-metallic spring (5) has an air inlet (8). An air inlet channel (9) connecting the non-metallic spring (5) and the piston rod (3) is provided, which communicates with the air inlet (8). An air inlet channel (10) connecting the piston rod (3) and the filter plug (7) is provided, which communicates with the air inlet channel (9). The pump body (2) has micropores that communicate with the air inlet channel (10) and the pump chamber (6). 11) When the discharge rod (4) moves down, the liquid in the pump chamber (6) is discharged through the discharge rod (4), and the air enters the pump chamber (6) through the air inlet (8), air inlet channel one (9), air inlet channel two (10), and micro-hole (11); after the discharge rod (4) is reset, the discharge rod (4) stops discharging liquid, and the piston rod (3) disconnects the communication channel between air inlet channel two (10) and micro-hole (11). The piston rod (3) has a sliding movable part extending from the upper end of the piston rod (3). The upper end of the movable rod (14) is axially fixedly connected to the liquid outlet rod (4) and a liquid outlet channel (15) is provided between the movable rod (3) and the liquid outlet rod (4). A liquid outlet channel (2) (16) is provided between the piston rod (3) and the movable rod (14) to connect the liquid outlet channel (15) and the pump chamber (6). When the liquid outlet rod (4) moves down, it drives the movable rod (14) to move down. The liquid in the pump chamber (6) is discharged through the liquid outlet channel (2) (16) and the liquid outlet channel (15).After the discharge rod (4) is reset, the piston rod (3) disconnects the communication channel between the discharge channel 2 (16) and the pump chamber (6). The piston rod (3) includes a rod portion (17) at the upper end and a sealing portion connected to the lower end of the rod portion (17). The sealing portion includes an inner sealing lip (18) that forms a conical seal with the movable rod (14), an outer sealing lip (19) that abuts against and seals the inner wall of the pump body (2), and a connecting portion (20) that connects the inner sealing lip (18) and the outer sealing lip (19). The inner wall of the filter plug (7) extends downward along its axis to form a sealing cylinder (21). The upper end face of the connecting portion (20) is recessed to form a sealing groove (22) that matches the sealing cylinder (21). The micropores (11) are located on the sidewalls of the pump body (2) and the sealing cylinder (21) opposite to each other. When the sealing cylinder (21) and the sealing groove (22) are in contact and sealed, the communication channel between the air inlet channel (10) and the micropores (11) is disconnected. The liquid outlet rod (4) is provided with an annular protrusion (23) that abuts against and limits the rod part (17). The lower end of the movable rod (14) is provided with a limiting protrusion (24) that extends out of the piston rod (3) and abuts against and limits the sealing part. The annular protrusion (23) and the limiting protrusion (24) limit the range of sliding of the piston rod (3) relative to the movable rod (14). One end of the non-metallic spring (5) is connected to the annular protrusion (23), and the other end is connected to the filter plug (7).

2. A spray pump according to claim 1, characterized in that: The micropore (11) includes a first micropore (12) formed by the concave upper end face of the pump body (2) and the filter plug (7), and a second micropore (13) formed by the concave outer wall of the pump body (2) and the filter plug (7). One end of the first micropore (12) is connected to the second air intake channel (10), and the other end is connected to one end of the second micropore (13). The other end of the second micropore (13) is connected to the pump chamber (6).

3. A spray pump according to claim 1 or 2, characterized in that: The pore size of the micropore (11) is less than 0.2 micrometers.

4. A spray pump according to claim 1, characterized in that: The outer sealing lip (19) is provided in two parts and is respectively provided on the upper and lower sides of the connecting part (20). The limiting protrusion (24) abuts against the lower outer sealing lip (19) for limiting.

5. A spray pump according to claim 1, characterized in that: The lower end of the liquid outlet rod (4) is slidably disposed in the rod part (17). The rod part (17) has a sealing protrusion (25) that seals the rod part (17) and the liquid outlet rod (4). The side wall of the movable rod (14) is provided with an annular groove (26). The inner side wall of the liquid outlet rod (4) has an annular protrusion (27) that matches the annular groove (26). The movable rod (14) is fixedly connected to the liquid outlet rod (4) axially by being engaged in the annular groove (26) through the annular protrusion (27).

6. A spray pump according to claim 1, characterized in that: The pump body (2) is provided with a hook (28) at the upper end, and the filter plug (7) is provided with a groove (29) that matches the hook (28). The pump body (2) is fixedly connected to the filter plug (7) by being engaged in the groove (29) through the hook (28).

Images