Liquid dispensing pump

Abstract

The present invention provides a liquid dispensing pump, comprising a pump body and a nozzle, the pump body comprising a pump body, a first accessory, a lower pump column, a piston, an upper pump column, a spring, a spiral coil and a glass bead, the pump body passes through the spiral coil, the first accessory, the lower pump column, the piston, the upper pump column, the spring and the glass bead are all arranged inside the pump body, the nozzle comprises a pressing plate and a connecting column, the interior of the pump body is divided into a first chamber, a second chamber and a third chamber, the first accessory is arranged in the third chamber, the piston is arranged in the second chamber, the bottom end of the upper pump column passes through the first accessory and the piston and is connected with the top end of the lower pump column, the lower pump column is arranged in the second chamber, and the bottom end of the lower pump column is arranged at the top end of the first chamber, by assembling the accessories in the pump body into semi-finished products, different spiral coils and nozzle products are provided for customers to choose according to customer needs, thereby improving work efficiency and avoiding the disadvantage of long delivery cycle time.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid dispensing pumps, and in particular to a liquid dispensing pump. Background Art

[0002] The liquid dispensing pump is generally installed at the opening of the container, and is used to pump the liquid product in the container out of the container for use through a manual pressing operation of the user.

[0003] The locking cover of the liquid dispensing pump cooperates with the pump body to achieve overall sealing, but the existing liquid dispensing pump can only be produced in parts according to the different styles and colors required by customers and then assembled into finished products, which leads to low production efficiency and no goods are stored in stock, resulting in slow delivery speed. Summary of the invention

[0004] An embodiment of the present invention provides a liquid dispensing pump, which solves the problem of slow supply speed by first assembling into a semi-finished product.

[0005] In view of the above problems, the technical solution proposed by the present invention is:

[0006] A liquid dispensing pump, comprising:

[0007] A liquid dispensing pump, the liquid dispensing pump comprising a pump body and a pressure nozzle, the pump body comprising a pump body, a first accessory, a lower pump column, a piston, an upper pump column, a spring, a spiral coil and a glass ball, the pump body passes through the spiral coil, the first accessory, the lower pump column, the piston, the upper pump column, the spring and the glass ball are all arranged inside the pump body, and the pressure nozzle comprises a pressure plate and a connecting column;

[0008] The interior of the pump body is divided into a first chamber, a second chamber and a third chamber, the first accessory is arranged in the third chamber, the piston is arranged in the second chamber, the bottom end of the upper pump column passes through the first accessory and the piston and is connected with the top end of the lower pump column, the lower pump column is arranged in the second chamber, and the bottom end of the lower pump column is arranged at the top end of the first chamber.

[0009] In order to better implement the technical solution of the present invention, the following technical measures are also adopted.

[0010] Furthermore, a glass bead placement groove is provided near the center of the inner wall of the first chamber, and the center of the glass bead placement groove is in the shape of a through hole, the glass beads are arranged in the glass bead placement groove, a limit block is provided on the top surface of the glass bead placement groove, and the top of the limit block is located in the first chamber, the maximum height between the inner wall of the limit block and the bottom surface of the glass bead placement groove is greater than the diameter of the glass bead, the limit block, the glass bead placement groove and the pump body are an integrated structure, and a first limit tooth is provided on the top outer wall of the pump body.

[0011] Furthermore, the upper pump column includes a first through tube and a second through tube, the diameter of the first through tube is smaller than the diameter of the second through tube, the first through tube is arranged inside the second through tube, and a connecting ring is provided on the outer wall of the first through tube near the top end and on the inner wall of the second through tube near the center, the first through tube and the second through tube are connected as a whole through the connecting ring, a limiting platform is provided on the outer wall of the first through tube near the bottom end, a second limiting ring is provided on the inner wall of the first through tube near the bottom end, the lower pump column is inserted into the bottom end of the first through tube, and the top end of the lower pump column is arranged on the bottom surface of the second limiting ring, a locking ring is provided on the outer wall of the first through tube near the top end, a second external thread is provided on the outer wall of the second through tube near the bottom end, and a second limiting tooth is provided on the inner wall of the second through tube near the top end.

[0012] Furthermore, the vertical cross-section of the first accessory is in an inverted "convex" shape, the bottom end of the second through tube is arranged on the inner bottom surface of the first accessory, the inner wall of the first accessory is provided with a second internal thread near the bottom end of the second through tube, and the second internal thread and the second external thread are adapted to each other, the top outer wall of the first accessory is provided with an inverted "U"-shaped ring, and the inverted "U"-shaped ring is engaged with the top end of the pump body through the first limiting teeth, and the first accessory and the inverted "U"-shaped ring are an integral structure.

[0013] Furthermore, the piston includes an inner ring and an outer ring, and the vertical cross-section of the piston is "H"-shaped, the inner ring is sleeved on the bottom end of the first through tube, and the top end of the inner ring is arranged below the limit platform, and the outer wall of the outer ring is interference fit with the inner wall of the second chamber.

[0014] Furthermore, the lower pump column is composed of two cylinders with increasing diameters from top to bottom, and the diameter of the lower cylinder in the pump column is larger than the diameter of the inner ring in the piston, a hole groove is provided on the bottom surface of the lower pump column, and the inner wall diameter of the hole groove is larger than the maximum diameter between the two limit blocks, the outer wall of the bottom end of the lower pump column is interference fit with the inner wall of the first chamber, a through hole is horizontally provided near the bottom end of the upper cylinder in the pump column, a vertical through groove is provided inside the upper cylinder in the pump column, and the through hole is connected to the through groove.

[0015] Furthermore, the inner wall of the spiral coil is provided with a third internal thread, the outer wall of the spiral coil is provided with an anti-slip texture, the outer wall of the pump body is provided with a first limiting ring near the top, the top of the pump body passes through the spiral coil, and the first limiting ring is arranged inside the spiral coil.

[0016] Furthermore, the connecting column is hollow, a liquid outlet groove is opened inside the pressure plate, and the liquid outlet groove is connected with the connecting column, the inner wall of the connecting column is provided with a locking groove near the bottom end, and the locking groove is adapted to the locking ring, and the outer wall of the connecting column is provided with a third limiting tooth, the third limiting tooth is adapted to the second limiting tooth, and the second limiting tooth and the third limiting tooth are both vertically arranged.

[0017] Furthermore, the outer wall of the pump body is provided with air holes.

[0018] Furthermore, a first inner buckle is provided on the inner wall of the pump body near the first limiting ring, a first outer buckle is provided on the outer wall of the first accessory, and the first outer buckle is matched with the first inner buckle.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] During the production and assembly stage, the upper pump column is connected to the lower pump column, and the upper pump column and the first accessory are fixed by the second external thread and the second internal thread. The first accessory is matched with the first internal thread on the pump body by the first external buckle, so that the first accessory and the pump body are fixed. In order to prevent the first accessory and the pump body from rotating relative to each other, the inverted "U"-shaped ring and the first limiting teeth on the first accessory are used to prevent the first accessory and the pump body from rotating relative to each other. At this time, the spring is in a compressed state, and the piston is pressed to the bottom end of the second chamber in the pump body through the limiting platform on the upper pump column, and the pressure nozzle drives the upper pump column to rotate when the pressure nozzle is rotated through the second limiting teeth and the third limiting teeth, and limits the pressure nozzle from moving up and down through the locking groove and the locking ring, and the spiral coil is fixed through the third internal thread liquid bottle mouth, and the first limiting ring on the pump body is pressed by the top surface of the spiral coil to fix the liquid dispensing pump, so that the liquid dispensing pump can be fixed by During the production stage, various accessories are assembled into semi-finished product inventory, and different screw rings and nozzle products can also be provided for customers to choose from according to customer needs, thereby improving work efficiency and avoiding the disadvantage of long supply cycle time. During the use stage, the rotating nozzle drives the upper pump column to rotate through the second limit teeth and the third limit teeth, so that the second external thread is separated from the second internal thread. At this time, the spring is in the pressure release stage, pressing the upper pump column to move upward, the upper pump column drives the lower pump column to move upward, and the lower pump column presses against the inner ring in the piston to move the piston upward, and then the liquid pushes the glass bead into the pump body through the pressure difference. When the nozzle is pressed down, the limit platform at the bottom of the upper pump column presses against the top of the inner ring in the piston and moves downward. At this time, the glass bead is blocked by the downward pressure The hole in the center of the glass bead placement groove blocks the liquid in the pump body from flowing back out of the pump body, and the liquid flows into the upper pump column through the through hole and the through groove, and then the liquid is pumped out.

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the liquid dispensing pump disclosed in the embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the semi-finished structure of the liquid dispensing pump disclosed in an embodiment of the present invention;

[0024] Figure 3 It is a schematic cross-sectional structure diagram of the liquid dispensing pump disclosed in an embodiment of the present invention during the use phase;

[0025] Figure 4 for Figure 1 Schematic diagram of the cross-section structure;

[0026] Figure 5 It is a schematic diagram of the explosion structure of the liquid dispensing pump disclosed in the embodiment of the present invention;

[0027] Figure 6 for Figure 5 Schematic diagram of the cross-section structure.

[0028] Reference numerals:

[0029] 100, liquid dispensing pump; 200, pump body; 201, pump body; 20101, first chamber; 20102, glass bead placement groove; 20103, limit block; 20104, second chamber; 20105, third chamber; 20106, first inner buckle; 20107, first limit ring; 20108, first limit tooth; 202, first accessory; 20201, second internal thread; 20202, first external buckle; 20203, inverted "U" ring; 203, lower pump column; 20301, hole groove; 20302, through hole; 20303, through groove; 204, piston; 20401 , inner ring; 20402, outer ring; 205, upper pump column; 20501, first through pipe; 20502, second through pipe; 20503, limit table; 20504, second limit ring; 20505, snap ring; 20506, connecting ring; 20507, second limit teeth; 20508, second external thread; 206, spring; 207, spiral; 20701, third internal thread; 20702, anti-slip texture; 208, glass beads; 300, pressure nozzle; 301, connecting column; 30101, third limit teeth; 30102, snap groove; 302, pressure plate; 30201, liquid outlet groove. Specific embodiments

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] See attached Figure 1 -6, the liquid dispensing pump 100, the liquid dispensing pump 100 comprises a pump body 200 and a pressure nozzle 300, the pump body 200 comprises a pump body 201, a first accessory 202, a lower pump column 203, a piston 204, an upper pump column 205, a spring 206, a spiral coil 207 and a glass bead 208, the pump body 200 passes through the spiral coil 207, the first accessory 202, the lower pump column 203, the piston 204, the upper pump column 205, the spring 206, and the glass bead 208 are all arranged inside the pump body 201, and the pressure nozzle 300 comprises a pressing plate 302 and a connecting column 301;

[0032] The interior of the pump body 201 is divided into a first chamber 20101, a second chamber 20104 and a third chamber 20105. The first accessory 202 is arranged in the third chamber 20105, the piston 204 is arranged in the second chamber 20104, the bottom end of the upper pump column 205 passes through the first accessory 202 and the piston 204 and is connected to the top end of the lower pump column 203. The lower pump column 203 is arranged in the second chamber 20104, and the bottom end of the lower pump column 203 is arranged at the top end of the first chamber 20101.

[0033] The embodiment of the present invention is also implemented through the following technical solutions.

[0034] See attached Figure 3As shown in Figure 4, in the embodiment of the present invention, a glass bead placement groove 20102 is provided near the center of the inner wall of the first chamber 20101, and the center of the glass bead placement groove 20102 is in the shape of a through hole, and the glass bead 208 is arranged in the glass bead placement groove 20102. A limit block 20103 is provided on the top surface of the glass bead placement groove 20102, and the top of the limit block 20103 is located in the first chamber 20101. The maximum height between the inner wall of the limit block 20103 and the bottom surface of the glass bead placement groove 20102 is greater than the diameter of the glass bead 208. The limit block 20103, the glass bead placement groove 20102 and the pump body 201 are in an integrated structure. The top outer wall of the pump body 201 is provided with a first limit tooth 20108. The glass bead 208 is placed in the glass bead placement groove 20102, and the glass bead 208 is fixed to the glass bead 208 by a plurality of limit blocks 20103. The glass beads 208 are limited, and the maximum height between the inner wall of the limit block 20103 and the bottom surface of the glass bead placement groove 20102 is greater than the diameter of the glass bead 208. Therefore, it is not difficult to understand that the glass bead 208 can move a certain distance in the glass bead placement groove 20102. When the liquid dispensing pump 100 is used for the first time, the nozzle 300 is pressed down to form a negative pressure inside the pump body 201. After no pressure is applied to the nozzle 300, the upper pump column 205 rebounds through the spring 206, and the liquid pushes the glass bead 208 into the pump body 201 through the pressure difference. When the nozzle 300 is pressed down again, the glass bead 208 is subjected to the downward pressure to block the hole in the center of the glass bead placement groove 20102, thereby preventing the liquid in the pump body 201 from flowing back out of the pump body 201. Therefore, the glass bead 208 plays a role in preventing the liquid in the pump body 201 from flowing back.

[0035] Refer to the attached Figure 6As shown, in the embodiment of the present invention, the upper pump column 205 includes a first through-tube 20501 and a second through-tube 20502, the diameter of the first through-tube 20501 is smaller than the diameter of the second through-tube 20502, the first through-tube 20501 is arranged inside the second through-tube 20502, and a connecting ring 20506 is provided near the top of the outer wall of the first through-tube 20501 and near the center of the inner wall of the second through-tube 20502, the first through-tube 20501 and the second through-tube 20502 are connected to form a whole through the connecting ring 20506, and the spring 206 is arranged between the first through-tube 20501 and the second through-tube 20502, and the top of the spring 206 is connected to the connecting ring 20506. The bottom surface of the spring 206 is in contact with the inner bottom surface of the first accessory 202, a limit platform 20503 is provided on the outer wall of the first through tube 20501 near the bottom end, a second limit ring 20504 is provided on the inner wall of the first through tube 20501 near the bottom end, the lower pump column 203 is inserted into the bottom end of the first through tube 20501, and the top of the lower pump column 203 is arranged on the bottom surface of the second limit ring 20504, a locking ring 20505 is provided on the outer wall of the first through tube 20501 near the top end, a second external thread 20508 is provided on the outer wall of the second through tube 20502 near the bottom end, and a second limit tooth 20507 is provided on the inner wall of the second through tube 20502 near the top end.

[0036] See attached Figure 4 As shown in Figure 6, in the embodiment of the present invention, the vertical cross-section of the first accessory 202 is in an inverted "convex" shape, the bottom end of the second through pipe 20502 is arranged on the inner bottom surface of the first accessory 202, and the inner wall of the first accessory 202 is provided with a second internal thread 20201 near the bottom end of the second through pipe 20502, and the second internal thread 20201 is adapted to the second external thread 20508, and the top outer wall of the first accessory 202 is provided with an inverted "U"-shaped ring 20203, and the inverted "U"-shaped ring 20203 is engaged with the top of the pump body 200 through the first limiting teeth 20108, the first accessory 202 and the inverted "U"-shaped ring 20203 are in an integrated structure, and the top of the spring 206 contacts the bottom surface of the connecting ring 20506, and the spring 2 The bottom end of 06 contacts the inner bottom surface of the first accessory 202. Before use, the upper pump column 205 is provided with a second external thread 20508 on the outer wall to match the second internal thread 20201 on the inner wall of the first accessory 202, so that the upper pump column 205 and the first accessory 202 are fixed when the liquid dispensing pump 100 is not in use, and the spring 206 is in a stressed state. It is not difficult to understand that the liquid dispensing pump 100 can be assembled in advance after production and before sale. When in use, the user only needs to rotate the nozzle 300 to drive the upper pump column 205 to rotate, so that the second external thread 20508 is separated from the second internal thread 20201. At this time, the spring 206 is in a pressure release state, thereby lifting the upper pump column 205.

[0037] See attached Figure 3 -6, in an embodiment of the present invention, the piston 204 includes an inner ring 20401 and an outer ring 20402, and the vertical cross-section of the piston 204 is "H"-shaped, the inner ring 20401 is sleeved on the bottom end of the first through tube 20501, and the top end of the inner ring 20401 is arranged below the limit platform 20503, and the outer wall of the outer ring 20402 is interference fit with the inner wall of the second chamber 20104.

[0038] See attached Figure 3 As shown in Figure 6, in the embodiment of the present invention, the lower pump column 203 is composed of two cylinders with increasing diameters from top to bottom, and the diameter of the cylinder located at the bottom of the lower pump column 203 is larger than the diameter of the inner ring 20401 in the piston 204, and the bottom surface of the lower pump column 203 is provided with a hole groove 20301, and the inner wall diameter of the hole groove 20301 is larger than the maximum diameter between the two limit blocks 20103. The outer wall of the bottom end of the lower pump column 203 is interference fit with the inner wall of the first chamber 20101, and the upper cylinder of the lower pump column 203 is horizontally provided near the bottom end. Through hole 20302, a vertical through groove 20303 is opened inside the cylinder located above in the pump column, and the through hole 20302 is connected with the through groove 20303. When in use, the nozzle 300 is pressed down. At this time, the spring 206 is stressed, and the limit platform 20503 opened at the bottom of the upper pump column 205 drives the piston 204 to move downward. The piston 204 applies pressure to the liquid in the pump body 201, so that the liquid flows into the upper pump column 205 through the through hole 20302 and the through groove 20303, and then the liquid flows out through the nozzle 300 to achieve the pumping of the liquid.

[0039] See attached Figure 1 -4, in an embodiment of the present invention, the inner wall of the screw coil 207 is provided with a third internal thread 20701, the outer wall of the screw coil 207 is provided with an anti-slip texture 20702, the outer wall of the pump body 201 is provided with a first limiting ring 20107 near the top, the top of the pump body 201 passes through the screw coil 207, and the first limiting ring 20107 is arranged inside the screw coil 207, the screw coil 207 is fixed at the bottle mouth through the inner wall provided with the third internal thread 20701, and the first limiting ring 20107 is limited by the top surface of the screw coil 207, so that the liquid dispensing pump 100 is fixed to the bottle body.

[0040] See attached Figure 3As shown in Figure 6, in the embodiment of the present invention, the connecting column 301 is hollow, the pressure plate 302 is provided with a liquid outlet groove 30201, and the liquid outlet groove 30201 is communicated with the connecting column 301, the inner wall of the connecting column 301 is provided with a snap-fit ​​groove 30102 near the bottom, and the snap-fit ​​groove 30102 is matched with the snap-fit ​​ring 20505, the outer wall of the connecting column 301 is provided with a third limiting tooth 30101, the third limiting tooth 30101 is matched with the second limiting tooth 20507, and the second limiting tooth 20507 and the third limiting tooth 30101 are both vertically arranged, the connecting column 301 and the pressure plate 302 are an integral structure, and the outer wall of the connecting column 301 is provided with a third limiting tooth 30101. A third limiting tooth 30101 is provided on the wall surface, and the third limiting tooth 30101 is matched with the second limiting tooth 20507 on the upper pump column 205, and both are vertically arranged. Therefore, it is not difficult to understand that when the nozzle 300 is rotated, the upper pump column 205 can be driven to rotate by the second limiting tooth 20507 and the third limiting tooth 30101, and the nozzle 300 is limited to move up and down by the locking groove 30102 and the locking ring 20505. Then, when the nozzle 300 is rotated, the second external thread 20508 and the second internal thread 20201 can be separated or merged to realize the use or storage of the liquid dispensing pump 100.

[0041] Refer to the attached Figure 5 As shown, in the embodiment of the present invention, an air hole is opened on the outer wall of the pump body 200. When the pressure nozzle 300 is pressed down, the piston 204 is driven to move downward, and the piston 204 discharges the air in the pump body 201 through the air hole provided on the pump body 200. When the pressure on the pressure nozzle 300 is removed, the upper pump column 205 moves upward under the action of the spring 206, and drives the piston 204 to move upward, thereby forming a negative pressure in the pump body 201, so that the liquid pushes up the glass beads 208 and enters the pump body 201.

[0042] Refer to the attached Figure 6 As shown, in an embodiment of the present invention, a first inner buckle 20106 is provided on the inner wall of the pump body 201 near the first limiting ring 20107, and a first outer buckle 20202 is provided on the outer wall of the first accessory 202, and the first outer buckle 20202 and the first inner buckle 20106 are adapted to each other, and the first accessory 202 and the pump body 201 are fixed by means of the first inner buckle 20106 and the first outer buckle 20202.

[0043] Specifically, the working principle of the liquid dispensing pump is as follows: during the production and assembly stage, the upper pump column 205 is connected to the lower pump column 203, and the upper pump column 205 and the first accessory 202 are fixed by the second external thread 20508 and the second internal thread 20201. The first accessory 202 is adapted to the first internal buckle 20106 on the pump body 201 through the first external buckle 20202, so that the first accessory 202 and the pump body 201 are fixed. In order to prevent the first accessory 202 and the pump body 201 from rotating relative to each other, the inverted "U"-shaped ring 20203 and the first limiting teeth 20108 on the first accessory 202 prevent the first accessory 202 and the pump body 201 from rotating relative to each other. At this time, the spring 206 is in a compressed state, and the activity The plug 204 is pushed to the bottom end of the second chamber 20104 in the pump body 201 through the limiting platform 20503 on the upper pump column 205, and the pressure nozzle 300 drives the upper pump column 205 to rotate when the pressure nozzle 300 is rotated through the second limiting teeth 20507 and the third limiting teeth 30101, and limits the pressure nozzle 300 from moving up and down through the locking groove 30102 and the locking ring 20505, and the spiral ring 207 is fixed to the liquid bottle mouth through the third internal thread 20701, and the first limiting ring 20701 on the pump body 201 is pressed by the top surface of the spiral ring 207 to fix the liquid dispensing pump 100, and then the liquid dispensing pump 100 can be assembled into a semi-finished product by assembling the various accessories in the pump body 201 during the production stage and stored as Figure 2 As shown, different spiral rings 207 and pressure nozzles 300 are provided for customers to choose according to their needs, so as to improve work efficiency and avoid the disadvantage of long supply cycle time. In the use stage, the rotating pressure nozzle 300 drives the upper pump column 205 to rotate through the second limit teeth 20507 and the third limit teeth 30101, so that the second external thread 20508 is separated from the second internal thread 20201. At this time, the spring 206 is in the pressure release stage, pressing the upper pump column 205 to move upward, and the upper pump column 205 drives the lower pump column 203 to move upward, and the lower pump column 203 presses against the piston 2 The inner ring 20401 in 04 makes the piston 204 move upward, and then the liquid pushes up the glass bead 208 through the pressure difference and enters the pump body 201. When the nozzle 300 is pressed down, the limit platform 20503 at the bottom end of the upper pump column 205 presses against the top of the inner ring 20401 in the piston 204 and moves downward. At this time, the glass bead 208 is subjected to the downward pressure to block the hole in the center of the glass bead placement groove 20102 to prevent the liquid in the pump body 201 from flowing back out of the pump body 201. The liquid flows into the upper pump column 205 through the through hole 20302 and the through groove 20303, and then the liquid is pumped out.

[0044] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A liquid dispensing pump, characterized in that: include: A liquid dispensing pump (100), the liquid dispensing pump (100) comprising a pump body (200) and a pressure nozzle (300), the pump body (200) comprising a pump body (201), a first accessory (202), a lower pump column (203), a piston (204), an upper pump column (205), a spring (206), a spiral coil (207) and a glass bead (208), the pump body (200) passing through the spiral coil (207), the first accessory (202), the lower pump column (203), the piston (204), the upper pump column (205), the spring (206) and the glass bead (208) are all arranged inside the pump body (201), and the pressure nozzle (300) comprises a pressure plate (302) and a connecting column (301); The interior of the pump body (201) is divided into a first chamber (20101), a second chamber (20104) and a third chamber (20105); the first accessory (202) is arranged in the third chamber (20105); the piston (204) is arranged in the second chamber (20104); the bottom end of the upper pump column (205) passes through the first accessory (202) and the piston (204) and is connected to the top end of the lower pump column (203); the lower pump column (203) is arranged in the second chamber (20104), and the bottom end of the lower pump column (203) is arranged at the top end of the first chamber (20101); The vertical cross-section of the first accessory (202) is in an inverted "convex" shape, the inner wall of the first accessory (202) is provided with a second internal thread (20201), the outer wall of the first accessory (202) is provided with a first external buckle (20202), the top outer wall of the first accessory (202) is provided with an inverted "U"-shaped ring (20203), and the inverted "U"-shaped ring (20203) is engaged with the top of the pump body (200), and the first accessory (202) and the inverted "U"-shaped ring (20203) are an integral structure.

2. A liquid dispensing pump according to claim 1, characterized in that: A glass bead placement groove (20102) is provided near the center of the inner wall of the first chamber (20101), and the center of the glass bead placement groove (20102) is in the shape of a through hole. The glass bead (208) is arranged in the glass bead placement groove (20102). A limit block (20103) is provided on the top surface of the glass bead placement groove (20102), and the top of the limit block (20103) is located in the first chamber (20101). The maximum height between the inner wall of the limit block (20103) and the bottom surface of the glass bead placement groove (20102) is greater than the diameter of the glass bead (208). The limit block (20103), the glass bead placement groove (20102) and the pump body (201) are in an integrated structure, and a first limit tooth (20108) is provided on the top outer wall of the pump body (201).

3. A liquid dispensing pump according to claim 2, characterized in that: The upper pump column (205) comprises a first through tube (20501) and a second through tube (20502). The diameter of the first through tube (20501) is smaller than the diameter of the second through tube (20502). The first through tube (20501) is arranged inside the second through tube (20502). A connecting ring (20506) is provided near the top of the outer wall of the first through tube (20501) and near the center of the inner wall of the second through tube (20502). The first through tube (20501) and the second through tube (20502) are connected to form a whole through the connecting ring (20506). The outer wall of the first through tube (20501) A limiting platform (20503) is provided near the bottom end, a second limiting ring (20504) is provided on the inner wall of the first through tube (20501) near the bottom end, the lower pump column (203) is inserted into the bottom end of the first through tube (20501), and the top end of the lower pump column (203) is arranged on the bottom surface of the second limiting ring (20504), a locking ring (20505) is provided on the outer wall of the first through tube (20501) near the top end, a second external thread (20508) is provided on the outer wall of the second through tube (20502) near the bottom end, and a second limiting tooth (20507) is provided on the inner wall of the second through tube (20502) near the top end.

4. A liquid dispensing pump according to claim 3, characterized in that: The bottom end of the second through tube (20502) is arranged on the inner bottom surface of the first accessory (202), the second internal thread (20201) is arranged on the inner wall of the first accessory (202) close to the bottom end of the second through tube (20502), and the second internal thread (20201) and the second external thread (20508) are adapted to each other, and the inverted "U"-shaped ring (20203) is engaged with the top end of the pump body (200) through the first limiting teeth (20108).

5. A liquid dispensing pump according to claim 4, characterized in that: The piston (204) comprises an inner ring (20401) and an outer ring (20402), and the vertical cross-section of the piston (204) is in an "H" shape, the inner ring (20401) is sleeved on the bottom end of the first through tube (20501), and the top end of the inner ring (20401) is arranged below the limit platform (20503), and the outer wall of the outer ring (20402) is interference fit with the inner wall of the second chamber (20104).

6. A liquid dispensing pump according to claim 5, characterized in that: The lower pump column (203) is composed of two cylinders with increasing diameters from top to bottom, and the diameter of the lower cylinder in the lower pump column (203) is larger than the diameter of the inner ring (20401) in the piston (204). A hole groove (20301) is provided on the bottom surface of the lower pump column (203), and the inner wall diameter of the hole groove (20301) is larger than the maximum diameter between the two limit blocks (20103). The outer wall of the bottom end of the lower pump column (203) is interference fit with the inner wall of the first chamber (20101). A through hole (20302) is horizontally provided near the bottom end of the upper cylinder in the lower pump column (203), and a vertical through groove (20303) is provided inside the upper cylinder in the lower pump column (203), and the through hole (20302) is connected to the through groove (20303).

7. A liquid dispensing pump according to claim 6, characterized in that: The inner wall of the screw coil (207) is provided with a third internal thread (20701), the outer wall of the screw coil (207) is provided with an anti-slip texture (20702), the outer wall of the pump body (201) is provided with a first limiting ring (20107) near the top, the top of the pump body (201) passes through the screw coil (207), and the first limiting ring (20107) is arranged inside the screw coil (207).

8. A liquid dispensing pump according to claim 7, characterized in that: The connecting column (301) is hollow, and a liquid outlet groove (30201) is provided inside the pressure plate (302), and the liquid outlet groove (30201) is communicated with the connecting column (301). The inner wall of the connecting column (301) is provided with a snap-fit ​​groove (30102) near the bottom end, and the snap-fit ​​groove (30102) is matched with the snap-fit ​​ring (20505). The outer wall of the connecting column (301) is provided with a third limiting tooth (30101), and the third limiting tooth (30101) is matched with the second limiting tooth (20507), and the second limiting tooth (20507) and the third limiting tooth (30101) are both vertically arranged.

9. A liquid dispensing pump according to claim 8, characterized in that: The outer wall of the pump body (200) is provided with air holes.

10. A liquid dispensing pump according to claim 9, characterized in that: A first inner buckle (20106) is provided on the inner wall of the pump body (201) near the first limiting ring (20107), and the first outer buckle (20202) is adapted to the first inner buckle (20106).

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