CN215972979U

CN215972979U - Waterproof emulsion pump

Info

Publication number: CN215972979U
Application number: CN202122575675.7U
Authority: CN
Inventors: 吴婉媚
Original assignee: Guangdong Zhongkai Plastic Industry Co ltd
Current assignee: Guangdong Zhongkai Plastic Industry Co ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-03-08
Anticipated expiration: 2031-10-26

Abstract

The utility model relates to a waterproof emulsion pump, which comprises a press head, an outer cover, a lock cover, a pump body, a piston assembly and a compression spring, wherein the lock cover comprises an outer cylinder, a connecting ring and an inner cylinder; the lower part of the pressing head is provided with an inner inserting column and an outer inserting column, the inner inserting column is positioned in the outer inserting column, a second annular groove with a downward opening is formed between the inner inserting column and the outer inserting column, the inner inserting column is connected with the upper end of the main column, the outer side wall of the inner inserting column is flush with the outer side wall of the main column, the main column is positioned in the inner cylinder, and the outer side wall of the main column is in close contact fit with the inner side wall of the inner cylinder; the lower end of the outer cylinder is in contact fit with the upper end of the piston. The utility model can prevent external water drops from entering the pump body through the lock cover, avoid the pollution caused by liquid in the pump body and ensure the quality and the storage time of the liquid in the pump body.

Description

Waterproof emulsion pump

Technical Field

The utility model relates to a liquid outlet component of cosmetics and bath supplies, in particular to a waterproof emulsion pump.

Background

Emulsion pumps on the market generally comprise a press head, a lock cover, an outer cover, a pump body, a piston assembly and a compression spring; the side wall of the inner cavity of the lock cover is provided with internal threads, the lock cover is arranged at the upper end of the pump body, and the outer cover is rotatably sleeved on the outer side of the lock cover; a liquid inlet is formed in the bottom of the pump body, and a first check valve is arranged at the liquid inlet; the piston assembly and the compression spring are arranged in the pump body, the piston assembly comprises a main column, a piston and an auxiliary column, the upper end of the auxiliary column is connected with the lower end of the main column, the press head is connected with the upper end of the main column, a first flow passage which runs up and down is arranged in the auxiliary column, a second flow passage which runs up and down is arranged in the main column, a third flow passage is arranged in the press head, the first flow passage, the second flow passage and the third flow passage are sequentially communicated, and a second check valve is arranged at the top of the second flow passage; the piston is annular and is sleeved on the main column, the inner side wall of the piston is tightly contacted with the outer side wall of the main column, and the outer side wall of the piston is tightly contacted with the inner side wall of the pump body; the outer side wall of the main column is provided with a limiting ring, the lower side surface of the limiting ring is provided with an annular groove with a downward opening, and the upper end of the piston is matched with the annular groove (when the piston ascends relative to the main column, the upper end of the piston can be embedded into the annular groove); the upper end of the compression spring is in contact with the auxiliary column, and the lower end of the compression spring is in contact with the pump body (the compression spring can apply upward acting force to the auxiliary column to enable the auxiliary column, the main column and the piston to ascend and reset). The second check valve comprises a second glass ball and a second valve seat formed at the top of the main column, the second valve seat is provided with a second truncated cone-shaped cavity with a large upper part and a small lower part (the bottom of the second truncated cone-shaped cavity is communicated with the second flow passage, and the top of the second truncated cone-shaped cavity is communicated with the third flow passage), and the second glass ball is positioned in the second truncated cone-shaped cavity.

Generally, the outer wall of the lower section of the button is provided with an external thread, and when the lotion pump is in an unopened state, the button and the lock cover are in a locked state through the matching of the external thread and the internal thread. When the press head is opened, the press head is disengaged from the lock cover, and a gap is formed between the outer wall of the main column and the side wall of the inner cavity of the lock cover and can be communicated with the inner cavity of the pump body. Usually, the emulsion pump is often placed under humid environment such as lavatory, and when people bathe, the lavatory all is water everywhere, and whole emulsion pump is very easily splashed wet by water, and the water droplet on the button enters into the inner chamber of the pump body from the gap between main post and the locking closure very easily, causes the pollution to the liquid in the pump body, influences the quality of liquid.

Disclosure of Invention

The utility model aims to solve the problem of providing a waterproof emulsion pump which can prevent external water drops from entering a pump body through a lock cover, avoid the pollution caused by liquid in the pump body and ensure the quality and the storage time of the liquid in the pump body.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

a waterproof emulsion pump comprises a press head, an outer cover, a pump body, a piston assembly and a compression spring; the outer cover can be rotatably sleeved on the outer side of the upper end of the pump body; a liquid inlet is formed in the bottom of the pump body, and a first check valve is arranged at the liquid inlet; the piston assembly and the compression spring are both arranged in the pump body; the piston assembly comprises a main column, a piston and an auxiliary column, the upper end of the auxiliary column is connected with the lower end of the main column, the piston is annular and is sleeved on the main column, the inner side wall of the piston is in close contact with the outer side wall of the main column, and the outer side wall of the piston is in close contact with the inner side wall of the pump body; the pressing head is connected with the upper end of the main column, a first flow passage is arranged in the auxiliary column, a second flow passage which runs up and down is arranged in the main column, a third flow passage is arranged in the pressing head, the first flow passage, the second flow passage and the third flow passage are sequentially communicated, and a second check valve is arranged at the top of the second flow passage; the lower part of the auxiliary column is provided with at least one liquid inlet hole which is communicated with the first flow channel; the upper end of the compression spring is contacted with the auxiliary column, and the lower end of the compression spring is contacted with the pump body; the method is characterized in that: the waterproof emulsion pump also comprises a lock cover, the lock cover is arranged at the upper end of the pump body and is in close contact with the outer side wall of the upper end of the pump body; the locking cover comprises an outer cylinder, a connecting ring and an inner cylinder, the lower end of the inner cylinder is connected with the middle part of the inner wall of the outer cylinder through the connecting ring, the lower part of the outer cylinder extends into the inner cavity of the pump body, a first annular groove with an upward opening is formed among the outer cylinder, the connecting ring and the inner cylinder, and the upper end of the inner cylinder is higher than the upper end of the outer cylinder; the lower part of the pressing head is provided with an inner inserting column and an outer inserting column, the inner inserting column is positioned in the outer inserting column, a second annular groove with a downward opening is formed between the inner inserting column and the outer inserting column, the inner inserting column is connected with the upper end of the main column, the outer side wall of the inner inserting column is flush with the outer side wall of the main column, the main column is positioned in the inner cylinder, and the outer side wall of the main column is in close contact fit with the inner side wall of the inner cylinder; the inner side wall of the outer cylinder is provided with internal threads, and the outer side wall of the outer inserting column is provided with external threads matched with the internal threads; the inner cylinder is in plug fit with the second annular groove; the lower end of the outer cylinder is in contact fit with the upper end of the piston.

When the press head and the lock cover are in a locking state, the external threads on the outer plug column on the lower portion of the press head are matched with the internal threads in the outer cylinder of the lock cover, the press head is locked on the lock cover, the outer plug column is located in the first annular groove, the inner cylinder is located in the second annular groove, and as the outer side wall of the inner plug column is flush with the outer side wall of the main column, the inner side wall of the inner cylinder is in close contact with the outer side wall of the inner plug column, the sealing between the lock cover and the press head can be enhanced, and the press head cannot move up and down and cannot be pressed. Because the press head can not move up and down, the emulsion can not flow out from the press head of the waterproof emulsion pump in the transportation process.

When the press head is disengaged from the lock cover, the main column moves upwards in the inner cylinder, so that the outer inserting column is disengaged from the first annular groove, the inner cylinder is disengaged from the second annular groove, and the inner side wall of the inner cylinder is in close contact with the outer side wall of the main column due to the fact that the outer side wall of the inner inserting column is flush with the outer side wall of the main column, sealing between the lock cover and the main column can be enhanced, and no gap exists between the inner wall of the lock cover and the outer side wall of the main column. And because the upper end of the inner cylinder is higher than the upper end of the outer cylinder, the upper end of the inner annular wall of the second annular groove is higher than the upper end of the outer annular wall of the second annular groove, even if the second annular groove is filled with water, the water in the second annular groove can overflow from the upper end of the outer annular wall of the second annular groove, and the water and water drops on the button in the second annular groove are difficult to enter the inner cavity of the pump body, so that the liquid in the pump body is not polluted, and the quality and the storage time of the liquid in the pump body can be ensured.

Generally, the inner cavity side wall of the outer cap is provided with an internal thread for connecting with an external thread of a bottle mouth of a packaging bottle, so that the waterproof lotion pump is mounted on the packaging bottle. The top of the pump body is also provided with an annular gasket, the upper end face of the annular gasket is in close contact with the lower end face of the top of the pump body, and the lower end face of the annular gasket is in close contact with the upper end face of the bottle opening of the packaging bottle, so that the packaging bottle is in sealed fit with the pump body.

In a preferred embodiment of the present invention, the outer cylinder, the connecting ring and the inner cylinder are integrally formed. Through the arrangement of the locking cover formed by the outer cylinder, the connecting ring and the inner cylinder in an integrated manner, the manufacturing of parts of the emulsion pump can be reduced, and the installation steps of the emulsion pump are reduced.

As a preferable scheme of the present invention, the lock cover further includes an outer limiting ring, the outer limiting ring is located on the outer side of the outer cylinder, a third annular groove with a downward opening is formed between the outer limiting ring and the outer cylinder, the upper end of the pump body is located in the third annular groove, and the outer sidewall of the upper end of the pump body is in close contact with the inner sidewall of the outer limiting ring. Through the sealed cooperation of the lateral wall of pump body upper end and the inside wall of outer spacing ring, can guarantee that the emulsion pump can not take place the weeping phenomenon in the transportation.

As a preferred scheme of the utility model, the piston comprises an outer ring, an annular connecting part and an inner ring, the middle part of the inner wall of the outer ring is connected with the middle part of the outer wall of the inner ring through the annular connecting part, and the outer side wall of the outer ring is in close contact with the inner side wall of the pump body; the lower end of the main column is positioned in the inner cavity, the outer side wall of the lower end of the main column is in close contact with the inner side wall of the inner ring, and the lower end of the inner ring is in contact fit with the lower part of the auxiliary column. The piston has two working positions of ascending to a high position and descending to a low position: when the piston rises to a high position, the upper end of the inner ring is in sealing fit with the outer side wall of the lower end of the main column, so that the sealing between the piston and the main column can be enhanced; when the piston descends to a low position, the lower end of the inner ring is in sealing fit with the outer side wall of the lower part of the auxiliary column, and sealing between the piston and the auxiliary column can be enhanced. Typically, the outer race, the annular connecting portion and the inner race are integrally formed.

As a further preferable aspect of the present invention, an annular end surface is provided at a lower portion of the main column, a circular truncated cone-shaped limiting portion having a smaller upper portion and a larger lower portion is provided at a lower portion of the sub column, and the inner ring is located between the annular end surface and the circular truncated cone-shaped limiting portion. When the press head is pressed, the piston rises to a high position, the upper end surface of the inner ring is in sealing fit with the annular end surface of the lower part of the main column at the moment, the sealing between the piston and the main column can be enhanced, and the lower end of the inner ring is separated from the circular truncated cone-shaped limiting part, so that emulsion in the cavity at the lower part of the pump body can smoothly enter the first flow channel from the liquid inlet hole, and the emulsion is prevented from leaking to the cavity at the upper part of the pump body; when the press head is released, the piston descends to a low position, the upper end surface of the inner ring is separated from the annular end surface of the lower part of the main column at the moment, the lower end of the inner ring is in sealing fit with the circular truncated cone-shaped limiting part of the lower part of the auxiliary column, the sealing between the piston and the auxiliary column can be enhanced, the liquid inlet hole of the first flow passage is separated from the cavity of the pump body, and the negative pressure is generated in the cavity of the lower part of the pump body.

As a further preferable scheme of the present invention, a first annular inclined surface is disposed at a lower end of the outer cylinder, an annular gap with a downward opening is defined by the first annular inclined surface and an inner side wall of the pump body, a second annular inclined surface matched with the first annular inclined surface is disposed at an upper end of the outer ring, and the second annular inclined surface is in insertion fit with the annular gap. When the product packaged by the packaging bottle is in an unused state, the piston is in a low position, and the second annular inclined surface at the upper end of the outer ring is in sealing fit with the first annular inclined surface at the lower end of the outer cylinder. When the product packaged by the packaging bottle is in a use state: when the press head is pressed, the second annular inclined surface at the upper end of the outer ring is disengaged from the first annular inclined surface at the lower end of the outer cylinder, and the piston rises to a high position; when the press head is released, the main column gradually ascends in the inner cylinder until the second annular inclined plane at the upper end of the outer ring is guided by the first annular inclined plane, so that the second annular inclined plane is positioned in the annular gap, and the main column stops ascending.

Generally, the first check valve comprises a first glass ball and a first valve seat formed at the bottom of the pump body, the first valve seat is provided with a first truncated cone-shaped cavity with a large upper part and a small lower part (the bottom of the first truncated cone-shaped cavity is communicated with the liquid inlet), the first glass ball is positioned in the first truncated cone-shaped cavity, and the first glass ball can seal the liquid inlet of the pump body to prevent emulsion in the pump body from flowing back into the packaging bottle. The second check valve comprises a second glass ball and a second valve seat formed at the top of the main column, the second valve seat is provided with a second truncated cone-shaped cavity with a large upper part and a small lower part (the bottom of the second truncated cone-shaped cavity is communicated with the second flow passage, and the top of the second truncated cone-shaped cavity is communicated with the third flow passage), and the second glass ball is positioned in the second truncated cone-shaped cavity.

The waterproof emulsion pump also comprises a liquid suction pipe, the lower end of the pump body is integrally connected with a connecting pipe, the upper end of the liquid suction pipe is spliced with the connecting pipe (usually, the upper end of the liquid suction pipe is inserted into the connecting pipe), and the liquid suction pipe is communicated with a liquid inlet at the bottom of the pump body. The use of a pipette increases the depth of penetration of the variable displacement pump into the liquid.

Compared with the prior art, the utility model has the following advantages:

the waterproof emulsion pump can enhance the sealing between the lock cover and the main column, so that no gap exists between the inner wall of the lock cover and the outer side wall of the main column, water drops are difficult to enter the inner cavity of the pump body, the liquid in the pump body is not polluted, and the quality and the storage time of the liquid in the pump body can be ensured.

Drawings

FIG. 1 is a schematic structural view of a locking mechanism of a locking head and a locking cover according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a button in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the pressing head in a pressing state in the embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-3, the waterproof lotion pump of the present embodiment includes a button 1, an outer cap 2, a locking cap 3, a pump body 4, a piston assembly 5 and a compression spring 6; the outer cover 2 can be rotatably sleeved on the outer side of the upper end of the pump body 4; the bottom of the pump body 4 is provided with a liquid inlet 41, and a first check valve 42 is arranged at the liquid inlet 41; the piston assembly 5 and the compression spring 6 are both arranged in the pump body 4; the piston assembly 5 comprises a main column 51, a piston 52 and an auxiliary column 53, wherein the upper end of the auxiliary column 53 is connected with the lower end of the main column 51, the piston 52 is annular and is sleeved on the main column 51, the inner side wall of the piston 52 is tightly contacted with the outer side wall of the main column 51, and the outer side wall of the piston 52 is tightly contacted with the inner side wall of the pump body 4; the press head 1 is connected with the upper end of a main column 51, a first flow passage 531 is arranged in an auxiliary column 53, a second flow passage 511 which runs up and down is arranged in the main column 51, a third flow passage 11 is arranged in the press head 1, the first flow passage 531, the second flow passage 511 and the third flow passage 11 are sequentially communicated, and a second check valve 512 is arranged at the top of the second flow passage 511; the lower part of the secondary column 53 is provided with two liquid inlet holes 532, and the liquid inlet holes 532 are communicated with the first flow channel 531; the upper end of the compression spring 6 is contacted with the auxiliary column 53, and the lower end is contacted with the pump body 4; the locking cover 3 is arranged at the upper end of the pump body 4, and the locking cover 3 is in close contact with the outer side wall of the upper end of the pump body 4; the locking cover 3 comprises an outer cylinder 31, a connecting ring 32 and an inner cylinder 33, the lower end of the inner cylinder 33 is connected with the middle part of the inner wall of the outer cylinder 31 through the connecting ring 32, the lower part of the outer cylinder 31 extends into the inner cavity of the pump body 4, a first annular groove 34 with an upward opening is formed among the outer cylinder 31, the connecting ring 32 and the inner cylinder 33, and the upper end of the inner cylinder 33 is higher than the upper end of the outer cylinder 31; the lower part of the pressing head 1 is provided with an inner inserting column 12 and an outer inserting column 13, the inner inserting column 12 is positioned in the outer inserting column 13, a second annular groove 14 with a downward opening is formed between the inner inserting column 12 and the outer inserting column 13, the inner inserting column 12 is connected with the upper end of a main column 51, the outer side wall of the inner inserting column 12 is flush with the outer side wall of the main column 51, the main column 51 is positioned in an inner cylinder 33, and the outer side wall of the main column 51 is tightly contacted and matched with the inner side wall of the inner cylinder 33; the inner side wall of the outer cylinder 31 is provided with an internal thread, and the outer side wall of the outer plug 13 is provided with an external thread matched with the internal thread; the inner cylinder 33 is in plug fit with the second annular groove 14; the lower end of the outer cylinder 31 is in contact engagement with the upper end of the piston 52.

When the press head 1 and the lock cover 3 are in a locking state, the external thread on the outer inserting column 13 at the lower part of the press head 1 is matched with the internal thread in the outer cylinder 31 of the lock cover 3, the press head 1 is locked on the lock cover 3, the outer inserting column 13 is positioned in the first annular groove 34, the inner cylinder 33 is positioned in the second annular groove 14, the outer side wall of the inner inserting column 12 is flush with the outer side wall of the main column 51, the inner side wall of the inner cylinder 33 is tightly contacted with the outer side wall of the inner inserting column 12, the sealing between the lock cover 3 and the press head 1 can be enhanced, and the press head 1 cannot move up and down and cannot be pressed. As the press head 1 can not move up and down, the emulsion can not flow out of the press head 1 of the waterproof emulsion pump in the transportation process.

When the button head 1 is disengaged from the lock cover 3, the main cylinder 51 moves upward in the inner cylinder 33, so that the outer plug cylinder 13 is disengaged from the first annular groove 34, the inner cylinder 33 is disengaged from the second annular groove 14, and since the outer side wall of the inner plug cylinder 12 is flush with the outer side wall of the main cylinder 51 and the inner side wall of the inner cylinder 33 is in close contact with the outer side wall of the main cylinder 51, the sealing between the lock cover 3 and the main cylinder 51 can be enhanced, so that no gap exists between the inner wall of the lock cover 3 and the outer side wall of the main cylinder 51. And because the upper end of the inner cylinder 33 is higher than the upper end of the outer cylinder 31, the upper end of the inner annular wall of the second annular groove 14 is higher than the upper end of the outer annular wall of the second annular groove 14, even if the second annular groove 14 is filled with water, the water in the second annular groove 14 can overflow from the upper end of the outer annular wall of the second annular groove 14, the water in the second annular groove 14 and the water drops on the press head 1 are difficult to enter the inner cavity of the pump body 4, the liquid in the pump body 4 cannot be polluted, and the quality and the storage time of the liquid in the pump body 4 can be ensured.

Generally, the inner cavity side wall of the outer cap 2 is provided with an internal thread for connecting with an external thread of a bottle mouth of a packaging bottle, thereby mounting the waterproof lotion pump on the packaging bottle. The top of the pump body 4 is also provided with an annular gasket 7, the upper end face of the annular gasket 7 is in close contact with the lower end face of the top of the pump body 4, and the lower end face of the annular gasket 7 is in close contact with the upper end face of the bottle opening of the packaging bottle, so that the packaging bottle is in sealed fit with the pump body 4.

The outer cylinder 31, the coupling ring 32 and the inner cylinder 33 are integrally formed. By arranging the locking cover 3 formed by integrally forming the outer cylinder 31, the connecting ring 32 and the inner cylinder 33, the manufacturing of parts of the lotion pump can be reduced, and the installation steps of the lotion pump can be reduced.

The locking cover 3 further comprises an outer limiting ring 35, the outer limiting ring 35 is located on the outer side of the outer cylinder 31, a third annular groove 36 with a downward opening is formed between the outer limiting ring 35 and the outer cylinder 31, the upper end of the pump body 4 is located in the third annular groove 36, and the outer side wall of the upper end of the pump body 4 is in close contact with the inner side wall of the outer limiting ring 35. Through the sealed cooperation of the lateral wall of the upper end of the pump body 4 and the inner side wall of the outer limiting ring 35, the emulsion pump can be ensured not to leak in the transportation process.

The piston 52 comprises an outer ring 521, an annular connecting part 522 and an inner ring 523, the middle part of the inner wall of the outer ring 521 is connected with the middle part of the outer wall of the inner ring 523 through the annular connecting part 522, and the outer side wall of the outer ring 521 is in close contact with the inner side wall of the pump body 4; the lower end of the main column 51 is arranged in the inner cavity, the outer side wall of the lower end of the main column 51 is in close contact with the inner side wall of the inner ring 523, and the lower end of the inner ring 523 is in contact fit with the lower part of the auxiliary column 53. The piston 52 has two working positions, i.e., a raised position and a lowered position: when the piston rises to the high position, the upper end of the inner ring 523 is in sealing fit with the outer side wall of the lower end of the main column 51, so that the sealing between the piston 52 and the main column 51 can be enhanced; when the piston descends to the low position, the lower end of the inner ring 523 is in sealing fit with the outer side wall of the lower part of the auxiliary column 53, so that the sealing between the piston 52 and the auxiliary column 53 can be enhanced. Generally, the outer race 521, the annular connecting portion 522, and the inner race 523 are integrally formed.

The lower part of the main column 51 is provided with an annular end surface 513, the lower part of the auxiliary column 53 is provided with a circular truncated cone-shaped limiting part 533 with a small upper part and a large lower part, and the inner ring 523 is positioned between the annular end surface 513 and the circular truncated cone-shaped limiting part 533. When the press head 1 is pressed, the piston 52 rises to a high position, at the moment, the upper end surface of the inner ring 523 is in sealing fit with the annular end surface 513 at the lower part of the main column 51, the sealing between the piston 52 and the main column 51 can be enhanced, and the lower end of the inner ring 523 is separated from the circular truncated cone-shaped limiting part 533 to be matched, so that emulsion in the cavity at the lower part of the pump body 4 can smoothly enter the first flow channel 531 from the liquid inlet hole 532, and the emulsion is prevented from leaking to the cavity at the upper part of the pump body 4; when the press head 1 is released, the piston 52 descends to a low position, at the moment, the upper end surface of the inner ring 523 is separated from the annular end surface 513 at the lower part of the main column 51, the lower end of the inner ring 523 is in sealing fit with the truncated cone-shaped limiting part 533 at the lower part of the auxiliary column 53, the sealing between the piston 52 and the auxiliary column 53 can be enhanced, the liquid inlet hole 532 of the first flow passage 531 is separated from the cavity of the pump body 4, and the negative pressure is generated in the cavity at the lower part of the pump body 4.

The lower end of the outer cylinder 31 is provided with a first annular inclined surface 311, the first annular inclined surface 311 and the inner side wall of the pump body 4 enclose an annular gap 312 with a downward opening, the upper end of the outer ring 521 is provided with a second annular inclined surface 5211 matched with the first annular inclined surface 311, and the second annular inclined surface 5211 is in plug-in fit with the annular gap 312. When the product packaged by the packaging bottle is in an unused state, the piston 52 is in a low position, and the second annular inclined surface 5211 at the upper end of the outer ring 521 is in sealing fit with the first annular inclined surface 311 at the lower end of the outer cylinder 31. When the product packaged by the packaging bottle is in a use state: when the press head 1 is pressed, the second annular inclined surface 5211 at the upper end of the outer ring 521 is disengaged from the first annular inclined surface 311 at the lower end of the outer cylinder 31, and the piston 52 rises to a high position; when the button 1 is released, the main post 51 gradually moves upward in the inner cylinder 33 until the second annular inclined surface 5211 at the upper end of the outer ring 521 is guided by the first annular inclined surface 311, so that the second annular inclined surface 5211 is located in the annular notch 312, and the main post 51 stops moving upward.

Generally, the first check valve 42 includes a first glass ball 421 and a first valve seat 422 formed at the bottom of the pump body 4, the first valve seat 422 has a first truncated cone-shaped cavity with a large top and a small bottom (the bottom of the first truncated cone-shaped cavity is communicated with the liquid inlet 41), the first glass ball 411 is located in the first truncated cone-shaped cavity, and the first glass ball 411 can seal the liquid inlet 41 of the pump body 4 to prevent the emulsion in the pump body 4 from flowing back to the packaging bottle. The second check valve 512 comprises a second glass ball 5121 and a second valve seat 5122 formed at the top of the main column 51, the second valve seat 5122 has a second truncated cone-shaped cavity with a large top and a small bottom (the bottom of the second truncated cone-shaped cavity is communicated with the second flow passage 511, and the top of the second truncated cone-shaped cavity is communicated with the third flow passage 11), and the second glass ball 5121 is located in the second truncated cone-shaped cavity.

The waterproof emulsion pump also comprises a liquid suction pipe 8, the lower end of the pump body 4 is integrally connected with a connecting pipe 9, the upper end of the liquid suction pipe 8 is spliced with the connecting pipe 9 (usually, the upper end of the liquid suction pipe 8 is inserted in the connecting pipe 9), and the liquid suction pipe 8 is communicated with a liquid inlet 41 at the bottom of the pump body 4. The depth of penetration of the variable displacement pump into the liquid can be increased by means of the pipette 8.

In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and the equivalent or simple change of the structure, the characteristics and the principle described in the present patent idea is included in the protection scope of the present patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. A waterproof emulsion pump comprises a press head, an outer cover, a pump body, a piston assembly and a compression spring; the outer cover can be rotatably sleeved on the outer side of the upper end of the pump body; a liquid inlet is formed in the bottom of the pump body, and a first check valve is arranged at the liquid inlet; the piston assembly and the compression spring are both arranged in the pump body; the piston assembly comprises a main column, a piston and an auxiliary column, the upper end of the auxiliary column is connected with the lower end of the main column, the piston is annular and is sleeved on the main column, the inner side wall of the piston is in close contact with the outer side wall of the main column, and the outer side wall of the piston is in close contact with the inner side wall of the pump body; the pressing head is connected with the upper end of the main column, a first flow passage is arranged in the auxiliary column, a second flow passage which runs up and down is arranged in the main column, a third flow passage is arranged in the pressing head, the first flow passage, the second flow passage and the third flow passage are sequentially communicated, and a second check valve is arranged at the top of the second flow passage; the lower part of the auxiliary column is provided with at least one liquid inlet hole which is communicated with the first flow channel; the upper end of the compression spring is contacted with the auxiliary column, and the lower end of the compression spring is contacted with the pump body; the method is characterized in that: the waterproof emulsion pump also comprises a lock cover, the lock cover is arranged at the upper end of the pump body and is in close contact with the outer side wall of the upper end of the pump body; the locking cover comprises an outer cylinder, a connecting ring and an inner cylinder, the lower end of the inner cylinder is connected with the middle part of the inner wall of the outer cylinder through the connecting ring, the lower part of the outer cylinder extends into the inner cavity of the pump body, a first annular groove with an upward opening is formed among the outer cylinder, the connecting ring and the inner cylinder, and the upper end of the inner cylinder is higher than the upper end of the outer cylinder; the lower part of the pressing head is provided with an inner inserting column and an outer inserting column, the inner inserting column is positioned in the outer inserting column, a second annular groove with a downward opening is formed between the inner inserting column and the outer inserting column, the inner inserting column is connected with the upper end of the main column, the outer side wall of the inner inserting column is flush with the outer side wall of the main column, the main column is positioned in the inner cylinder, and the outer side wall of the main column is in close contact fit with the inner side wall of the inner cylinder; the inner side wall of the outer cylinder is provided with internal threads, and the outer side wall of the outer inserting column is provided with external threads matched with the internal threads; the inner cylinder is in plug fit with the second annular groove; the lower end of the outer cylinder is in contact fit with the upper end of the piston.

2. The waterproof lotion pump as set forth in claim 1, wherein: the outer cylinder, the connecting ring and the inner cylinder are integrally formed.

3. The waterproof lotion pump as set forth in claim 1, wherein: the locking cover further comprises an outer limiting ring, the outer limiting ring is located on the outer side of the outer cylinder, a third annular groove with a downward opening is formed between the outer limiting ring and the outer cylinder, the upper end of the pump body is located in the third annular groove, and the outer side wall of the upper end of the pump body is in close contact with the inner side wall of the outer limiting ring.

4. The waterproof lotion pump as set forth in claim 1, wherein: the piston comprises an outer ring, an annular connecting part and an inner ring, the middle part of the inner wall of the outer ring is connected with the middle part of the outer wall of the inner ring through the annular connecting part, and the outer side wall of the outer ring is in close contact with the inner side wall of the pump body; the lower end of the main column is positioned in the inner cavity, the outer side wall of the lower end of the main column is in close contact with the inner side wall of the inner ring, and the lower end of the inner ring is in contact fit with the lower part of the auxiliary column.

5. The waterproof emulsion pump of claim 4, wherein: the lower part of the main column is provided with an annular end face, the lower part of the auxiliary column is provided with a round table-shaped limiting part with a small upper part and a large lower part, and the inner ring is positioned between the annular end face and the round table-shaped limiting part.

6. The waterproof emulsion pump of claim 4, wherein: the lower extreme of outer cylinder is equipped with first annular inclined plane, first annular inclined plane with the pump body inside wall encloses into the annular breach that the opening is decurrent, outer lane upper end is equipped with the second annular inclined plane with first annular inclined plane complex, and second annular inclined plane is pegged graft with annular breach and is cooperated.