CN217075450U

CN217075450U - Emulsion pump

Info

Publication number: CN217075450U
Application number: CN202220941996.6U
Authority: CN
Inventors: 吴婉媚
Original assignee: Guangdong Zhongkai Plastic Industry Co ltd
Current assignee: Guangdong Zhongkai Plastic Industry Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-07-29
Anticipated expiration: 2032-04-22

Abstract

The utility model relates to an emulsion pump, including press head, pump body, enclosing cover and principal post subassembly, the principal post subassembly includes principal post, piston, auxiliary post, compression spring and locking closure, the piston includes outer lane, annular connecting portion and inner circle, outer lane, annular connecting portion and inner circle are made integratively, the inner circle suit is on the auxiliary post, the inside wall of inner circle and the lateral wall in close contact with of auxiliary post; the press head is provided with a third flow passage, the press head is connected with the upper end of the main column, and the third flow passage is communicated with the first flow passage; the lock cover is arranged at the upper end of the pump body and sleeved on the main column, the outer side wall of the lock cover is tightly contacted with the inner side wall at the upper end of the pump body, the inner side wall of the lock cover is tightly contacted with the outer side wall of the main column, and the outer cover is rotatably sleeved on the outer side of the lock cover; the compression spring is sleeved on the upper section of the main column, the upper end of the compression spring is in contact with the upper end of the main column, and the lower end of the compression spring is in contact with the upper end of the lock cover. The emulsion pump is tightly connected, can improve the sealing performance among components, and can effectively prevent the occurrence of liquid leakage.

Description

Emulsion pump

Technical Field

The utility model relates to a liquid outlet component of cosmetics and bath articles, in particular to a lotion 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 inner threads, the lock cover is arranged at the upper end of the pump body, and the outer cover can be 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.

In the emulsion pump, the auxiliary column and the compression spring are simply matched, after the emulsion pump is used for a long time, the elastic effect of the compression spring is poor, the auxiliary column cannot be well reset, the sealing effect between the piston and the main column is poor, the main column and the auxiliary column are not tightly matched, liquid leakage is easy to occur, and the requirements of users cannot be met.

Disclosure of Invention

The utility model aims to solve the problem that a lotion pump is provided, this kind of lotion pump structural connection is inseparable, can improve the sealing performance between each subassembly, can effectively prevent the phenomenon emergence of weeping.

In order to solve the technical problem, the utility model discloses a technical scheme as follows:

a lotion pump comprises a press head, a pump body, an outer cover and a main column assembly, wherein the side wall of an inner cavity of the outer cover is provided with internal threads, and the main column assembly is arranged in the inner cavity of the pump body; a liquid inlet is arranged at the bottom of the pump body, and a check valve is arranged at the liquid inlet; the main column assembly comprises a main column, a piston, an auxiliary column and a compression spring, the upper end of the auxiliary column is connected with the main column, a first flow passage which runs up and down is arranged in the main column, a second flow passage is arranged in the auxiliary column, and the second flow passage is communicated with the first flow passage; the lower end of the auxiliary column is provided with at least one liquid inlet hole which is communicated with the second flow channel; the piston comprises an outer ring, an annular connecting part and an inner ring, the outer ring, the annular connecting part and the inner ring are integrally manufactured, the inner ring is sleeved on the auxiliary column, and the inner side wall of the inner ring is in close contact with the outer side wall of the auxiliary column; the press head is provided with a third flow passage, the press head is connected with the upper end of the main column, and the third flow passage is communicated with the first flow passage; the method is characterized in that: the main column assembly further comprises a lock cover, the lock cover is installed at the upper end of the pump body and sleeved on the main column, the outer side wall of the lock cover is in close contact with the inner side wall of the upper end of the pump body, the inner side wall of the lock cover is in close contact with the outer side wall of the main column, and the outer cover is rotatably sleeved on the outer side of the lock cover; the compression spring is sleeved on the upper section of the main column, the upper end of the compression spring is contacted with the upper end of the main column, and the lower end of the compression spring is contacted with the upper end of the lock cover; the upper section of the auxiliary column is positioned in the first flow channel, and the outer side wall of the upper section of the auxiliary column is in close contact with the inner side wall of the first flow channel; the upper section of the outer ring, the annular connecting part and the upper section of the inner ring are surrounded to form an upper annular limiting groove with an upward opening, the lower end of the main column is positioned in the upper annular limiting groove, the upper section of the inner ring is positioned in the first flow channel, the outer side wall of the upper section of the inner ring is in close contact with the inner side wall of the first flow channel, the lower end of the inner ring is in contact fit with the lower part of the auxiliary column, the outer side wall of the outer ring is in close contact with the inner side wall of the pump body, and the upper end of the outer ring is in contact fit with the lower end of the lock cover.

The outer cover is used for being connected with the bottle mouth of the packaging bottle, so that the lotion pump is installed 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.

When a product packaged by the packaging bottle is in an unused state, the outer side wall of the upper section of the auxiliary column is in close contact with the inner side wall of the first flow channel, so that the auxiliary column is in sealing fit with the inner side wall of the first flow channel; the compression spring is in an extension state (the compression force is small); because the press head is connected with the upper end of the main column, the outer side wall of the lock cover is in close contact with the inner side wall of the upper end of the pump body, the inner side wall of the lock cover is in close contact with the outer side wall of the main column, the inner side wall of the inner ring is in close contact with the outer side wall of the auxiliary column, the outer side wall of the upper section of the inner ring is in close contact with the inner side wall of the first flow channel, the outer side wall of the outer ring is in close contact with the inner side wall of the pump body, and the check valve at the bottom of the pump body seals the liquid inlet, so that the pump body cavity above the check valve is in a closed state, and at the moment, no emulsion exists in the second flow channel and the third flow channel.

When the press head is pressed downwards, the press head drives the main column to move downwards, and because the outer side wall of the upper section of the auxiliary column is in close contact with the inner side wall of the first flow channel, the auxiliary column moves downwards along with the press head and the main column, the compression spring is compressed, and the piston does not move downwards simultaneously under the action of external force at the moment; when the main column and the auxiliary column continue to move downwards along the inner side wall of the pump body, the upper end of the outer ring is separated from the lower end of the lock cover, the lower end of the inner ring is separated from the lower part of the auxiliary column, and the liquid inlet hole of the second flow channel is opened to communicate the liquid inlet hole with the cavity of the pump body, so that emulsion in the cavity at the lower part of the pump body can smoothly enter the second flow channel; until the main column is pressed down to the piston (the piston is lifted to a high position relative to the auxiliary column), the lower end of the main column is in sealing fit with the bottom of the upper annular limiting groove of the piston, at the moment, the compression spring is compressed continuously, the piston can move down along with the main column, the emulsion in the pump body is pressurized, the emulsion cannot flow into the matching position of the pump body and the lock cover from the outer ring outer side wall of the piston and the inner side wall of the pump body due to the close contact of the outer ring outer side wall of the piston and the inner side wall of the pump body, the emulsion cannot flow into the packaging bottle from the matching position of the outer ring and the pump body, the check valve seals the liquid inlet at the bottom of the pump body due to the pressure of the emulsion (due to the sealing fit between the main column assembly and the pump body), the emulsion cannot flow back into the packaging bottle through the liquid inlet, and the emulsion in the pump body cavity can only flow out from the liquid inlet hole, the second flow passage and the third flow passage in the pressing head in the auxiliary column in sequence.

The pressing head is released, after the pressing force is removed, the main column is acted by the upward resilience force of the compression spring to drive the pressing head and the auxiliary column to move upwards, the outer side wall of the outer ring of the piston is in tight contact (interference seal) with the inner side wall of the pump body, the piston has resistance and keeps static until the lower end of the main column is separated from the bottom of the upper annular limiting groove of the piston, the upper end of the outer ring is in sealing fit with the lower end of the lock cover, the lower end of the inner ring is in sealing fit with the lower part of the auxiliary column (the piston descends to a low position relative to the auxiliary column), and the liquid inlet hole at the lower part of the auxiliary column is closed, so that the liquid inlet hole is separated from the cavity of the pump body, and the negative pressure is generated in the cavity of the pump body; under the action of resilience resetting of the compression spring, the press head, the main column and the auxiliary column can drive the piston to continuously rise and reset, negative pressure is generated in the pump body cavity, the check valve at the bottom of the pump body is opened, and emulsion in the packaging bottle enters the pump body cavity through the liquid inlet.

As the utility model discloses an optimal scheme, be equipped with first annular step on the inside wall at first runner middle part, the up end of vice post is in the below of first annular step and with the lower surface in close contact with of first annular step, peg graft according to the head lower extreme in the upper end opening of first runner, according to the head lower extreme and the upper surface in close contact with of first annular step. Through this kind of setting, can prevent that the secondary column from continuing to slide along the inside wall of first flow channel, guarantee the sealed cooperation of secondary column and main post.

As a further preferred scheme of the utility model, be equipped with the protruding edge of the first annular of at least round on the lateral wall of press head lower extreme, be equipped with at least one first ring groove on the inside wall of first runner upper end, first annular is protruding along being in first ring groove. Through the mutual cooperation of the annular convex edge at the lower end of the press head and the first annular clamping groove at the upper end of the main column, the press head is fixed at the upper end of the first flow channel, so that the sealing between the press head and the main column can be enhanced, and the press head is prevented from being separated from the main column and being loosened to cause liquid leakage.

As a further preferred scheme of the utility model, be equipped with the protruding edge of at least round second annular on the inside wall at first runner middle part, be equipped with the protruding edge of at least round third annular on the lateral wall of auxiliary column upper segment, the protruding edge of third annular is the same and the one-to-one with the protruding edge quantity of second annular, and the protruding edge of third annular cooperates with the protruding edge joint of corresponding second annular. The upper section of the auxiliary column is connected with the main column, and the second annular convex edges of the upper section of the auxiliary column and the second annular convex edges in the first flow passage are in one-to-one correspondence and are in clamping fit with each other, so that the upper section of the auxiliary column is fixedly arranged in the first flow passage of the main column, and the auxiliary column moves along with the movement of the main column.

As the preferred scheme of the utility model, be equipped with second annular step on the inside wall of first flow channel lower part, the up end of inner circle is in the below of second annular step and cooperates with the lower surface contact of second annular step. Through the arrangement, the inner ring can be prevented from continuously sliding along the inner side wall of the first flow channel, and the sealing fit of the inner ring and the main column is ensured. When the press head is pressed, the piston rises to a high position relative to the auxiliary column, and the upper end surface of the inner ring is in sealing fit with the second annular step at the lower part of the main column, so that the sealing between the piston and the main column can be enhanced. When the press head is released, the piston descends to a low position relative to the auxiliary column, and the upper end surface of the inner ring is separated from the second annular step at the lower part of the main column.

As a further preferred scheme of the utility model, be equipped with the protruding edge of at least round fourth annular on the lateral wall of the inner ring upper segment, the protruding edge of fourth annular with the inside wall in close contact with of first runner. Through this kind of setting, change the sealed cooperation of original face into the sealed cooperation of line face for sealed complex area of contact reduces, and the user presses to feel relatively can be more smooth when using.

As the preferred scheme of the utility model, be equipped with the protruding edge of fifth annular on the lateral wall of principal post lower extreme, the protruding edge of fifth annular with the cooperation of locking closure lower extreme contact. The fifth annular protruding edge on the outer side wall of the lower end of the main column can protect the auxiliary column, and when the sealing matching force between the auxiliary column and the main column is insufficient, the auxiliary column can not be separated from the main column.

As the utility model discloses an optimal scheme, be equipped with third annular step on the lateral wall of principal post upper end, be equipped with the fourth annular step that corresponds with third annular step on the lateral wall of locking closure upper end, the lower surface contact of compression spring upper end and third annular step, the upper surface contact of compression spring lower extreme and fourth annular step. With this arrangement, the compression spring is confined between the third annular step and the fourth annular step.

As a further preferred scheme of the utility model, be equipped with first spacing protruding edge on the opening border of enclosing cover upper end, be equipped with on the lateral wall of locking closure upper end with first spacing protruding along the spacing protruding edge of buckle complex second, the spacing protruding edge of second is in the below of fourth annular step. When the enclosing cover suit was in the outside of locking closure, the first spacing protruding edge on the enclosing cover and the spacing protruding edge buckle cooperation of second on the locking closure made the locking closure buckle enclosing cover open-ended border, prevented that whole emulsion pump breaks away from in the enclosing cover opening.

As the utility model discloses an optimal scheme, the enclosing cover upper end is equipped with the first guide cylinder of opening up, press the head lower extreme to be equipped with the second guide cylinder of opening down, the external diameter of second guide cylinder is less than the internal diameter of first guide cylinder, and the lower part of second guide cylinder is in first guide cylinder, and the inner chamber of second guide cylinder and the inner chamber of first guide cylinder form and to hold compression spring's flexible chamber, compression spring is located flexible chamber. When the press head is pressed downwards, the outer wall of the second guide cylinder at the lower end of the press head moves downwards along the inner wall of the first guide cylinder at the upper end of the outer cover, so that the size of the telescopic cavity is reduced, and the compression spring is compressed; after the pressing force is cancelled, the main column drives the pressing head to move upwards under the action of the upward resilience force of the compression spring, so that the volume of the telescopic cavity is enlarged, and the compression spring is gradually rebounded and reset. In addition, with compression spring setting in flexible chamber, when using the emulsion pump, first guide cylinder, second guide cylinder play the effect of sheltering from compression spring, prevent that compression spring from getting damp and getting rusty.

As the utility model discloses an optimal scheme, be equipped with the protruding edge of sixth annular on the lateral wall of locking closure, be equipped with second annular clamping groove on the inside wall of pump body upper end, the protruding edge of sixth annular is in second annular clamping groove. Through the mutual cooperation of the sixth annular protruding edge of the locking closure and the second annular clamping groove of the pump body, the outer side wall of the locking closure is fixed on the inner side wall of the upper end of the pump body, so that the sealing between the locking closure and the pump body can be enhanced, and the main column assembly is prevented from being separated from the pump body.

As the utility model discloses an optimal selection scheme still includes the dust cover, is equipped with the spacing protruding edge of third on the opening border of dust cover lower extreme, be equipped with on the lateral wall of enclosing cover upper end with the spacing protruding edge of buckle complex fourth spacing protruding edge of third, the dust cover closes on the enclosing cover upper end through the spacing protruding edge of third and the spacing protruding edge buckle cooperation lid of fourth. Through the arrangement, the dust cover can be prevented from being separated from the outer cover and falling off in the transportation process, the phenomenon that the press head is polluted can be reduced, and the sanitary quality of the emulsion pump is ensured.

As the utility model discloses a preferred scheme, the lower part of auxiliary column is equipped with the spacing portion of round platform form big end down, the inner circle lower extreme is equipped with from interior to the annular inclined plane of outer downward sloping gradually, annular inclined plane and the spacing portion contact cooperation of round platform form. When the press head is pressed, the piston rises to a high position relative to the auxiliary column, the upper end face of the inner ring is in sealing fit with the second annular step at the lower part of the main column, and the lower end of the inner ring is separated from the truncated cone-shaped limiting part, so that emulsion in the cavity at the lower part of the pump body can smoothly enter the second 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 relative to the auxiliary column, the upper end surface of the inner ring is separated from the second annular step at the lower part of the main column, the annular inclined surface at the lower end of the inner ring is in sealing fit with the round platform-shaped limiting part at 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 second flow channel is separated from the cavity of the pump body, and the negative pressure is generated in the cavity at the lower part of the pump body.

Generally, the check valve comprises a glass ball and a valve seat formed at the bottom of the pump body, wherein the valve seat is provided with a truncated cone-shaped cavity with a large top and a small bottom (the bottom of the truncated cone-shaped cavity is communicated with the liquid inlet), and the glass ball is positioned in the truncated cone-shaped cavity. The glass ball can seal the liquid inlet of the pump body, and prevents emulsion in the pump body from flowing back into a packaging bottle.

The emulsion pump also comprises a pipette, the lower end of the pump body is integrally connected with a connecting pipe, the upper end of the pipette is spliced with the connecting pipe (usually, the upper end of the pipette is inserted in the connecting pipe), and the pipette is communicated with a liquid inlet at the bottom of the pump body. The depth of the emulsion pump extending into the liquid can be increased by using the pipette.

Compared with the prior art, the utility model, have following advantage:

the emulsion pump greatly improves the sealing performance among the components by arranging the multilayer sealing structure, can effectively prevent the leakage phenomenon from occurring, and better meets the requirements of users.

Drawings

FIG. 1 is a schematic structural view of an embodiment of the present invention before use;

fig. 2 is a schematic structural diagram of the embodiment of the present invention in use.

Detailed Description

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

As shown in fig. 1-2, the lotion pump in this embodiment comprises a button 1, a pump body 2, an outer cover 3 and a main column assembly 4, wherein the inner cavity side wall of the outer cover 3 is provided with inner threads 34, and the main column assembly 4 is installed in the inner cavity of the pump body 2; a liquid inlet 21 is arranged at the bottom of the pump body 2, and a check valve 22 is arranged at the liquid inlet 21; the main column assembly 4 comprises a main column 41, a piston 42, an auxiliary column 43, a compression spring 44 and a locking cover 45, wherein the upper end of the auxiliary column 43 is connected with the main column 41, a first flow passage 411 which runs up and down is arranged in the main column 41, a second flow passage 431 is arranged in the auxiliary column 43, and the second flow passage 431 is communicated with the first flow passage 411; the lower end of the auxiliary column 43 is provided with three liquid inlet holes 432, and the liquid inlet holes 432 are communicated with the second flow channel 431; the piston 42 comprises an outer ring 421, an annular connecting part 422 and an inner ring 423, the outer ring 421, the annular connecting part 422 and the inner ring 423 are integrally manufactured, the inner ring 423 is sleeved on the auxiliary column 43, and the inner side wall of the inner ring 423 is tightly contacted with the outer side wall of the auxiliary column 43; the press head 1 is provided with a third flow channel 11, the press head 1 is connected with the upper end of the main column 41, and the third flow channel 11 is communicated with the first flow channel 411; the locking cover 45 is installed at the upper end of the pump body 2 and sleeved on the main column 41, the outer side wall of the locking cover 45 is tightly contacted with the inner side wall of the upper end of the pump body 2, the inner side wall of the locking cover 45 is tightly contacted with the outer side wall of the main column 41, and the outer cover 3 is rotatably sleeved on the outer side of the locking cover 45; the compression spring 44 is sleeved on the upper section of the main column 41, the upper end of the compression spring 44 is contacted with the upper end of the main column 41, and the lower end of the compression spring 44 is contacted with the upper end of the lock cover 45; the upper section of the sub-column 43 is located in the first flow passage 411, and the outer side wall of the upper section of the sub-column 43 is in close contact with the inner side wall of the first flow passage 411; an upper annular limiting groove 424 with an upward opening is defined among the upper section of the outer ring 421, the annular connecting portion 422 and the upper section of the inner ring 423, the lower end of the main column 41 is positioned in the upper annular limiting groove 424, the upper section of the inner ring 423 is positioned in the first flow passage 411, the outer side wall of the upper section of the inner ring 423 is in close contact with the inner side wall of the first flow passage 411, the lower end of the inner ring 423 is in contact fit with the lower part of the auxiliary column 43, the outer side wall of the outer ring 421 is in close contact with the inner side wall of the pump body 2, and the upper end of the outer ring 421 is in contact fit with the lower end of the lock cover 45.

The outer cover 3 is used for being connected with the bottle mouth of the packaging bottle so as to install the lotion pump on the packaging bottle. The top of the pump body 2 is also provided with an annular gasket 5, the upper end face of the annular gasket 5 is in close contact with the lower end face of the top of the pump body 2, and the lower end face of the annular gasket 5 is in close contact with the upper end face of the bottle opening of the packaging bottle, so that the packaging bottle is in sealing fit with the pump body 2.

A first annular step 4111 is arranged on the inner side wall of the middle of the first flow passage 411, the upper end surface of the secondary column 43 is located below the first annular step 4111 and is in close contact with the lower surface of the first annular step 4111, the lower end of the pressing head 1 is inserted into an upper end opening of the first flow passage 411, and the lower end of the pressing head 1 is in close contact with the upper surface of the first annular step 4111. With this arrangement, the sub-column 43 can be prevented from continuing to slide along the inner side wall of the first flow passage 411, ensuring a sealing engagement of the sub-column 43 with the main column 41.

The outer side wall of the lower end of the pressing head 1 is provided with two circles of first annular convex edges 12, the inner side wall of the upper end of the first flow passage 411 is provided with two first annular clamping grooves 4112, and the first annular convex edges 12 are located in the first annular clamping grooves 4112. Through the mutual cooperation of the annular convex edge at the lower end of the press head 1 and the first annular clamping groove 4112 at the upper end of the main column 41, the press head 1 is fixed on the upper end of the first flow passage 411, so that the sealing between the press head 1 and the main column 41 can be enhanced, and the press head 1 and the main column 41 are prevented from being separated and loosened to cause liquid leakage.

Be equipped with two circles of second annular protruding edges 4113 on the inside wall at first flow channel 411 middle part, be equipped with two circles of third annular protruding edges 433 on the lateral wall of the upper segment of subsidiary post 43, third annular protruding edges 433 is the same and the one-to-one with second annular protruding edges 4113 quantity, and third annular protruding edges 433 cooperates with the joint of corresponding second annular protruding edges 4113. The upper section of the secondary column 43 is connected with the main column 41, and the second annular ledge 4113 of the upper section of the secondary column 43 is in one-to-one correspondence with the second annular ledge 4113 in the first flow passage 411 and is in snap fit with each other, so that the upper section of the secondary column 43 is fixedly arranged in the first flow passage 411 of the main column 41, and the secondary column 43 moves along with the movement of the main column 41.

A second annular step 4114 is arranged on the inner side wall of the lower portion of the first flow passage 411, and the upper end surface of the inner ring 423 is located below the second annular step 4114 and is in contact fit with the lower surface of the second annular step 4114. With this arrangement, the inner ring 423 can be prevented from continuously sliding along the inner side wall of the first flow passage 411, and the sealing engagement of the inner ring 423 and the main column 41 can be ensured. When the push head 1 is pushed, the piston 42 is raised to a high position relative to the sub-column 43, and the upper end surface of the inner ring 423 is in sealing engagement with the second annular step 4114 at the lower portion of the main column 41, so that the sealing between the piston 42 and the main column 41 is enhanced. When the push head 1 is released, the piston 42 is lowered relative to the sub-column 43 to a lower position, in which the upper end surface of the inner race 423 is separated from the second annular step 4114 in the lower portion of the main column 41.

The outer side wall of the upper section of the inner ring 423 is provided with a ring of fourth annular convex edge 4231, and the fourth annular convex edge 4231 is in close contact with the inner side wall of the first flow channel 411. Through this kind of setting, change the sealed cooperation of original face into the sealed cooperation of line face for sealed complex area of contact reduces, and the user presses when using and feels and can be more smooth relatively.

The outer side wall of the lower end of the main column 41 is provided with a fifth annular convex edge 412, and the fifth annular convex edge 412 is in contact fit with the lower end of the lock cover 45. The fifth annular ledge 412 on the outer side wall of the lower end of the main column 41 can protect the auxiliary column 43, and prevent the auxiliary column 43 from being separated from the main column 41 when the sealing fit force between the auxiliary column 43 and the main column 41 is insufficient.

The outer side wall of the upper end of the main column 41 is provided with a third annular step 413, the outer side wall of the upper end of the locking cover 45 is provided with a fourth annular step 451 corresponding to the third annular step 413, the upper end of the compression spring 44 is in contact with the lower surface of the third annular step 413, and the lower end of the compression spring 44 is in contact with the upper surface of the fourth annular step 451. With this arrangement, the compression spring 44 is confined between the third annular step 413 and the fourth annular step 451.

The opening edge of the upper end of the outer cover 3 is provided with a first limiting convex edge 31, the outer side wall of the upper end of the lock cover 45 is provided with a second limiting convex edge 452 in snap fit with the first limiting convex edge 31, and the second limiting convex edge 452 is located below the fourth annular step 451. When the outer cover 3 is sleeved on the outer side of the locking cover 45, the first limiting convex edge 31 on the outer cover 3 is in snap fit with the second limiting convex edge 452 on the locking cover 45, so that the locking cover 45 buckles the edge of the opening of the outer cover 3, and the whole emulsion pump is prevented from being separated from the opening of the outer cover 3.

The upper end of the outer cover 3 is provided with a first guide cylinder 32 with an upward opening, the lower end of the press head 1 is provided with a second guide cylinder 13 with a downward opening, the outer diameter of the second guide cylinder 13 is smaller than the inner diameter of the first guide cylinder 32, the lower part of the second guide cylinder 13 is positioned in the first guide cylinder 32, the inner cavity of the second guide cylinder 13 and the inner cavity of the first guide cylinder 32 form a telescopic cavity 14 capable of accommodating the compression spring 44, and the compression spring 44 is positioned in the telescopic cavity 14. When the press head 1 is pressed downwards, the outer wall of the second guide cylinder 13 at the lower end of the press head 1 moves downwards along the inner wall of the first guide cylinder 32 at the upper end of the outer cover 3, so that the volume of the telescopic cavity 14 is reduced, and the compression spring 44 is compressed; after the pressing force is released, the main column 41 is acted by the upward rebound force of the compression spring 44 to drive the pressing head 1 to move upwards, so that the volume of the telescopic cavity 14 is increased, and the compression spring 44 is gradually rebounded and reset. In addition, the compression spring 44 is arranged in the telescopic cavity 14, and when the lotion pump is used, the first guide cylinder 32 and the second guide cylinder 13 play a role in shielding the compression spring 44, so that the compression spring 44 is prevented from being rusted due to moisture.

A sixth annular convex edge 453 is arranged on the outer side wall of the lock cover 45, a second annular clamping groove 23 is arranged on the inner side wall of the upper end of the pump body 2, and the sixth annular convex edge 453 is located in the second annular clamping groove 23. Through the mutual cooperation of the sixth annular ledge 453 of the locking cover 45 and the second annular clamping groove 23 of the pump body 2, the outer side wall of the locking cover 45 is fixed on the inner side wall of the upper end of the pump body 2, so that the sealing between the locking cover 45 and the pump body 2 can be enhanced, and the main column assembly 4 is prevented from being separated from the pump body 2.

Still include dust cover 6 in this embodiment, be equipped with the spacing protruding edge 61 of third on the opening border of dust cover 6 lower extreme, be equipped with the spacing protruding edge 33 of fourth with the spacing protruding edge 61 snap fit of third on the lateral wall of enclosing cover 3 upper end, dust cover 6 closes on enclosing cover 3 upper end through the spacing protruding edge 61 of third and the spacing protruding edge 33 snap fit of fourth. Through the arrangement, the dust cover 6 can be prevented from being separated from the outer cover 3 and falling off in the transportation process, the phenomenon that the press head 1 is polluted can be reduced, and the sanitary quality of the emulsion pump is ensured.

The lower part of the auxiliary column 43 is provided with a circular truncated cone-shaped limiting part 434 with a small upper part and a large lower part, the lower end of the inner ring 423 is provided with an annular inclined surface 4232 which gradually inclines downwards from inside to outside, and the annular inclined surface 4232 is in contact fit with the circular truncated cone-shaped limiting part 434. When the press head 1 is pressed, the piston 42 rises to a high position relative to the secondary column 43, at this time, the upper end surface of the inner ring 423 is in sealing fit with the second annular step 4114 at the lower part of the primary column 41, and the lower end of the inner ring 423 is disengaged from the truncated cone-shaped limiting part 434, so that emulsion in the cavity at the lower part of the pump body 2 can smoothly enter the second flow channel 431 from the liquid inlet hole 432, and the emulsion is prevented from leaking to the cavity at the upper part of the pump body 2; when the pressing head 1 is released, the piston 42 descends relative to the secondary post 43 to a lower position, the upper end surface of the inner ring 423 is separated from the second annular step 4114 at the lower part of the main post 41, and the annular inclined surface 4232 at the lower end of the inner ring 423 is in sealing fit with the circular truncated cone-shaped limiting part 434 at the lower part of the secondary post 43, so that the sealing between the piston 42 and the secondary post 43 can be enhanced, and the liquid inlet hole 432 of the second flow passage 431 is separated from the cavity of the pump body 2, so that negative pressure can be generated in the lower cavity of the pump body 2.

Generally, the check valve 22 includes a glass ball 25 and a valve seat 24 formed at the bottom of the pump body 2, the valve seat 24 has a truncated cone-shaped cavity with a large top and a small bottom (the bottom of the truncated cone-shaped cavity is communicated with the liquid inlet 21), and the glass ball 25 is located in the truncated cone-shaped cavity. The glass ball 25 can seal the liquid inlet 21 of the pump body 2 to prevent the emulsion in the pump body 2 from flowing back into the packaging bottle.

The emulsion pump can also comprise a pipette 7, the lower end of the pump body 2 is integrally connected with a connecting pipe 26, the upper end of the pipette 7 is inserted into the connecting pipe 26 (usually, the upper end of the pipette 7 is inserted into the connecting pipe 26), and the pipette 7 is communicated with the liquid inlet 21 at the bottom of the pump body 2. The depth of the emulsion pump extending into the liquid can be increased by means of the pipette 7.

When the product packaged by the packaging bottle is in an unused state, the outer side wall of the upper section of the auxiliary column 43 is in close contact with the inner side wall of the first flow channel 411, so that the auxiliary column 43 is in sealing fit with the inner side wall of the first flow channel 411; the compression spring 44 is in an extended state (low compression force); since the button head 1 is connected with the upper end of the main column 41, the outer side wall of the lock cover 45 is in close contact with the inner side wall of the upper end of the pump body 2, the inner side wall of the lock cover 45 is in close contact with the outer side wall of the main column 41, the inner side wall of the inner ring 423 is in close contact with the outer side wall of the auxiliary column 43, the outer side wall of the upper section of the inner ring 423 is in close contact with the inner side wall of the first flow channel 411, the outer side wall of the outer ring 421 is in close contact with the inner side wall of the pump body 2, and the check valve 22 at the bottom of the pump body 2 seals the liquid inlet 21, the cavity of the pump body 2 above the check valve 22 is in a closed state, and at this time, no emulsion exists in the second flow channel 431 and the third flow channel 11.

When the press head 1 is pressed downwards, the press head 1 drives the main column 41 to move downwards, because the outer side wall of the upper section of the auxiliary column 43 is tightly contacted with the inner side wall of the first flow channel 411, the auxiliary column 43 moves downwards along with the press head 1 and the main column 41, the compression spring 44 is compressed, and at the moment, the piston 42 is not acted by external force and cannot move downwards together; when the main column 41 and the auxiliary column 43 continue to move downwards along the inner side wall of the pump body 2, the upper end of the outer ring 421 is separated from the lower end of the lock cover 45, the lower end of the inner ring 423 is separated from the lower part of the auxiliary column 43, and the liquid inlet hole 432 of the second flow channel 431 is opened, so that the liquid inlet hole 432 is communicated with the cavity of the pump body 2, and emulsion in the cavity at the lower part of the pump body 2 can smoothly enter the second flow channel 431; until the lower end of the main column 41 is in sealing engagement with the bottom of the upper annular limiting groove 424 of the piston 42 after the main column 41 is pressed down onto the piston 42 (the piston 42 is raised to a high position relative to the secondary column 43), the compression spring 44 is compressed, the piston 42 moves down along with the main column 41, the emulsion in the pump body 2 is pressurized, because the outer side wall of the outer ring 421 of the piston 42 is in close contact with the inner side wall of the pump body 2, the emulsion cannot flow into the matching position of the pump body 2 and the lock cover 45 from the matching position of the outer ring 421 and the pump body 2, and the check valve 22 is pressed by the emulsion to close the liquid inlet 21 at the bottom of the pump body 2 (due to the sealing fit between the main column assembly 4 and the pump body 2), the emulsion can not flow back into the packaging bottle through the liquid inlet 21 through the check valve 22, the emulsion in the cavity of the pump body 2 can only flow out of the liquid inlet hole 432 in the secondary column 43, the second flow passage 431 and the third flow passage 11 in the press head 1 in sequence.

When the press head 1 is released and the pressing force is removed, the main column 41 is acted by the upward rebound force of the compression spring 44 to drive the press head 1 and the auxiliary column 43 to move upward, because the outer side wall of the outer ring 421 of the piston 42 is tightly contacted with the inner side wall of the pump body 2 (interference seal), the piston 42 has resistance to keep still until the lower end of the main column 41 is separated from the bottom of the upper annular limiting groove 424 of the piston 42, the upper end of the outer ring 421 is in sealing fit with the lower end of the lock cover 45, the lower end of the inner ring 423 is in sealing fit with the lower part of the auxiliary column 43 (the piston 42 descends to a low position relative to the auxiliary column 43), and the liquid inlet hole 432 at the lower part of the auxiliary column 43 is closed, so that the liquid inlet hole 432 is separated from the cavity of the pump body 2, and the negative pressure generated in the cavity of the pump body 2 is facilitated; under the action of resilience resetting of the compression spring 44, the press head 1, the main column 41 and the auxiliary column 43 can drive the piston 42 to continuously rise and reset, negative pressure is generated in the cavity of the pump body 2, the check valve 22 at the bottom of the pump body 2 is opened, and emulsion in the packaging bottle enters the cavity of the pump body 2 through the liquid inlet 21.

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 all the equivalent or simple changes made according to the structure, the features and the principle of the present invention are included in the protection scope of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A lotion pump comprises a press head, a pump body, an outer cover and a main column assembly, wherein the side wall of an inner cavity of the outer cover is provided with internal threads, and the main column assembly is arranged in the inner cavity of the pump body; a liquid inlet is arranged at the bottom of the pump body, and a check valve is arranged at the liquid inlet; the main column assembly comprises a main column, a piston, an auxiliary column and a compression spring, the upper end of the auxiliary column is connected with the main column, a first flow passage which runs up and down is arranged in the main column, a second flow passage is arranged in the auxiliary column, and the second flow passage is communicated with the first flow passage; the lower end of the auxiliary column is provided with at least one liquid inlet hole which is communicated with the second flow channel; the piston comprises an outer ring, an annular connecting part and an inner ring, the outer ring, the annular connecting part and the inner ring are integrally manufactured, the inner ring is sleeved on the auxiliary column, and the inner side wall of the inner ring is in close contact with the outer side wall of the auxiliary column; the press head is provided with a third flow passage, the press head is connected with the upper end of the main column, and the third flow passage is communicated with the first flow passage; the method is characterized in that: the main column assembly further comprises a lock cover, the lock cover is installed at the upper end of the pump body and sleeved on the main column, the outer side wall of the lock cover is in close contact with the inner side wall of the upper end of the pump body, the inner side wall of the lock cover is in close contact with the outer side wall of the main column, and the outer cover is rotatably sleeved on the outer side of the lock cover; the compression spring is sleeved on the upper section of the main column, the upper end of the compression spring is contacted with the upper end of the main column, and the lower end of the compression spring is contacted with the upper end of the lock cover; the upper section of the auxiliary column is positioned in the first flow channel, and the outer side wall of the upper section of the auxiliary column is in close contact with the inner side wall of the first flow channel; the upper section of the outer ring, the annular connecting part and the upper section of the inner ring are surrounded to form an upper annular limiting groove with an upward opening, the lower end of the main column is positioned in the upper annular limiting groove, the upper section of the inner ring is positioned in the first flow channel, the outer side wall of the upper section of the inner ring is in close contact with the inner side wall of the first flow channel, the lower end of the inner ring is in contact fit with the lower part of the auxiliary column, the outer side wall of the outer ring is in close contact with the inner side wall of the pump body, and the upper end of the outer ring is in contact fit with the lower end of the lock cover.

2. An emulsion pump as claimed in claim 1, wherein: the inner side wall of the middle part of the first flow channel is provided with a first annular step, the upper end surface of the auxiliary column is positioned below the first annular step and is in close contact with the lower surface of the first annular step, the lower end of the press head is inserted into the upper end opening of the first flow channel, and the lower end of the press head is in close contact with the upper surface of the first annular step.

3. An emulsion pump as claimed in claim 2, wherein: the outer side wall of the lower end of the press head is provided with at least one circle of first annular convex edge, the inner side wall of the upper end of the first flow channel is provided with at least one first annular clamping groove, and the first annular convex edge is positioned in the first annular clamping groove.

4. An emulsion pump as claimed in claim 2, wherein: the inner side wall of the middle part of the first flow channel is provided with at least one circle of second annular convex edge, the outer side wall of the upper section of the auxiliary column is provided with at least one circle of third annular convex edge, the third annular convex edges are in same quantity and one-to-one correspondence with the second annular convex edges, and the third annular convex edges are in clamping fit with the corresponding second annular convex edges.

5. An emulsion pump as claimed in claim 1, wherein: and a second annular step is arranged on the inner side wall of the lower part of the first flow channel, and the upper end surface of the inner ring is positioned below the second annular step and is in contact fit with the lower surface of the second annular step.

6. An emulsion pump as claimed in claim 5, wherein: and the outer side wall of the upper section of the inner ring is provided with at least one circle of fourth annular convex edge, and the fourth annular convex edge is in close contact with the inner side wall of the first flow channel.

7. An emulsion pump as claimed in claim 1, wherein: and a fifth annular convex edge is arranged on the outer side wall of the lower end of the main column and is in contact fit with the lower end of the lock cover.

8. An emulsion pump as claimed in claim 1, wherein: the outer side wall of the upper end of the main column is provided with a third annular step, the outer side wall of the upper end of the locking cover is provided with a fourth annular step corresponding to the third annular step, the upper end of the compression spring is in contact with the lower surface of the third annular step, and the lower end of the compression spring is in contact with the upper surface of the fourth annular step.

9. An emulsion pump as claimed in claim 8, wherein: the opening edge of the upper end of the outer cover is provided with a first limiting convex edge, the outer side wall of the upper end of the lock cover is provided with a second limiting convex edge in buckle fit with the first limiting convex edge, and the second limiting convex edge is located below the fourth annular step.

10. An emulsion pump as claimed in claim 1, wherein: the upper end of the outer cover is provided with a first guide cylinder with an upward opening, the lower end of the press head is provided with a second guide cylinder with a downward opening, the outer diameter of the second guide cylinder is smaller than the inner diameter of the first guide cylinder, the lower part of the second guide cylinder is positioned in the first guide cylinder, the inner cavity of the second guide cylinder and the inner cavity of the first guide cylinder form a telescopic cavity capable of accommodating the compression spring, and the compression spring is positioned in the telescopic cavity;

a sixth annular convex edge is arranged on the outer side wall of the lock cover, a second annular clamping groove is formed in the inner side wall of the upper end of the pump body, and the sixth annular convex edge is positioned in the second annular clamping groove;

the dustproof cover is covered on the upper end of the outer cover through the buckling and matching of the third limiting convex edge and the fourth limiting convex edge;

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, the lower end of the inner ring is provided with an annular inclined surface which gradually inclines downwards from inside to outside, and the annular inclined surface is in contact fit with the round table-shaped limiting part.