CN217625105U - Suck-back pressing pump device - Google Patents

Abstract

The utility model discloses a suck-back press pump device. The suck-back pressing pump device comprises a body, a main column, an auxiliary column, a suck-back column, a moving part, an elastic part, a pressing part and a suction pipe, wherein the body is of a tubular structure and comprises a first end part and a second end part, the suction pipe is connected with the second end part, the inner wall of the body is provided with a first limiting part, a first boss and a second limiting part, the main column, the auxiliary column, the suck-back column and the moving part are both arranged in the body, the main column is of a hollow structure, the pressing part is connected with one end of the main column towards the first end part, the elastic part is sleeved on the main body, one end of the auxiliary column is embedded in the main column, the other end of the auxiliary column extends to the outside of the main column towards the second end part, a flowing gap is reserved between the outer wall of the auxiliary column and the inner wall of the main column, the auxiliary column is provided with an auxiliary column flowing channel which is communicated with the liquid flowing gap, and the moving part is of a columnar structure. The suck-back pressing pump device has the advantages of simple structure and low cost, and is easy to form local negative pressure in the pump when in use, thereby reducing the residue of the content in the liquid outlet nozzle.

Description

Suck-back pressing pump device

Technical Field

The utility model relates to a suck-back press pump device.

Background

At present, the plastic bottle body is mostly adopted for packaging liquid in daily life, and the liquid outlet is realized by adopting a pressing and extruding mode. The pressing liquid outlet adopts a pressing head structure, and when the pressing head structure is used, the content in the bottle body is manually pressed to be discharged from the liquid outlet nozzle of the pressing head. When traditional press head resets after pressing and releasing, the drain nozzle still remains partial content, and this partial content easily drips from the drain nozzle and causes the waste, and in addition, the drain nozzle remains the content and also causes the content to pollute easily, especially in the food field, easily causes food safety incident.

SUMMERY OF THE UTILITY MODEL

Based on this, the present application provides a suck-back compression pump device. The utility model provides a suck-back press pump device simple structure, with low costs can reach the food level, easily forms local negative pressure in the pump when using, and the content in the liquid outlet nozzle reduces remaining of liquid outlet nozzle content in the suck-back pump, solves the remaining problem of content that the press head structure exists among the conventional art.

The suck-back pressing pump device provided by one embodiment comprises a body, a main column, an auxiliary column, a suck-back column, a movable piece, an elastic piece, a pressing piece and a suction pipe;

the body is of a tubular structure and is provided with a first end part and a second end part, the second end part is connected with the straw, the inner wall of the body is provided with a first limiting piece, a first boss and a second limiting piece which are protruded, the first limiting piece is close to the first end part, and the first boss and the second limiting piece are close to the second end part;

the main column, the auxiliary column, the suck-back column and the movable piece are all arranged in the body;

the main column is of a hollow structure, one end, facing the first end, of the main column is connected with the pressing piece, the pressing piece is provided with a liquid outlet flow channel, the elastic piece is sleeved on the main column, and two ends of the elastic piece are respectively abutted to the first limiting piece and the pressing piece;

one end of the auxiliary column is embedded in the main column, the other end of the auxiliary column extends to the outside of the main column towards the second end, a sealing end capable of being in sealing fit with the first boss is formed at the other end of the auxiliary column, a circulation gap is formed between the outer wall of the main column and the inner wall of the main column, a circulation opening communicated with the circulation gap is formed between the end face of the auxiliary column towards the second end and the sealing end, the auxiliary column is provided with an auxiliary column flow channel, and the auxiliary column flow channel is used for communicating the liquid outlet flow channel and the circulation gap;

the suck-back column is connected with the auxiliary column in a dynamic sealing mode, and one end, facing the second end portion, of the suck-back column can be in sealing fit with the second limiting piece;

the movable part is hollow flat column structure, the auxiliary post wears to locate the movable part, the outer wall of movable part with the inner wall contact cooperation of body, the movable part can the circulation clearance internalization, work as the main post with when the auxiliary post is in the reset state, the movable part seals the circulation opening, work as the main post with when the auxiliary post is in the complete press state, the movable part is opened the circulation opening.

In some of these embodiments, the radial dimension of the second end inner wall is less than the radial dimension of the first end inner wall.

In some embodiments, the second limiting member is closer to the second end portion than the first boss, the second limiting member has a limiting cavity, and a first opening and a second opening which are communicated with the limiting cavity, the first opening is communicated with the inner cavity of the body, the second opening is communicated with the suction pipe, and an end portion of the suck-back column is located in the limiting cavity and used for being in sealing fit with the inner wall of the limiting cavity to open or close the second opening.

In some embodiments, the first opening and the second opening are circular, the end of the suck-back column located in the limiting cavity is a hemispherical structure, the diameter of the first opening is smaller than the maximum diameter of the hemispherical structure, and the diameter of the second opening is smaller than the maximum diameter of the hemispherical structure.

In some embodiments, the end face of the movable piece facing the first end part is provided with a first abdicating groove, and when the primary column and the secondary column synchronously move, the end part of the primary column facing the second end part can be in contact fit with the inner wall of the first abdicating groove;

and/or the end surface of the movable piece facing the second end part is provided with a second abdicating groove.

In some embodiments, the end face of the movable member facing the second end portion can be in sealing engagement with the second boss.

In some of these embodiments, the radial dimension of the end inner wall of the main column towards the second end gradually increases outwards.

In some of these embodiments, the resilient member is a plastic spring;

and/or the suction pipe is a plastic hose.

In some embodiments, the pressing member has a connecting end and a liquid outlet end, the connecting end is connected to the main column, and an end of the liquid outlet end is bent toward the second end.

In some embodiments, a plurality of liquid inlet through holes are arranged on the side wall of the secondary column, the liquid inlet through holes are opened in the flow gaps, and the liquid inlet through holes are used for communicating the secondary column flow channel with the flow gaps.

In some embodiments, the suck-back pressing pump device further comprises a valve assembly connected to the liquid outlet end for closing or opening the liquid outlet end.

In some embodiments, the suck-back and push pump device further comprises a lock cover, the lock cover is sleeved on the first end portion, and the lock cover has an internal thread.

In some embodiments, the suck-back pressing pump device further includes a gasket, the port of the first end portion has a first outward flange and a second outward flange, a locking groove is formed between the first outward flange and the second outward flange, the cover surface of the locking cover is embedded in the locking groove, and the gasket is further connected to an inner surface of the first outward flange and/or the second outward flange facing the second end portion.

Above-mentioned push pump device is pressed in resorption, simple structure, with low costs can reach the food level, easily forms local negative pressure in the pump when using, and the content in the resorption liquid outlet nozzle reduces remaining of liquid outlet nozzle content, solves among the prior art the remaining problem of content that the press head structure exists.

When the suck-back press pump device is used, the suck-back press pump device is installed on a bottle body, a press piece is pressed for the first time, the press piece drives a main column and an auxiliary column to move downwards and simultaneously compress an elastic piece to extrude the body, the space in the body is gradually reduced and gradually pressurized, transient negative pressure is formed in the space in the body at the moment when the press piece is released, and after the press piece is released, the press piece, the main column and the auxiliary column rapidly move upwards to reset under the driving of the reset action of the elastic piece; when liquid needs to be discharged, the pressing piece is pressed again, the pressing piece drives the main column and the auxiliary column to move downwards and simultaneously compress the elastic piece, the body is extruded, the space in the body is gradually reduced and is gradually pressurized, the content in the body can extrude the suck-back column to completely fall back and reset and block the second opening due to the fact that the inside of the body is in a pressurizing state, when the pressing piece is pressed continuously, the inner wall of the first abdicating groove is separated from the end portion of the main column (the outer wall of the moving piece receives the friction force of the inner wall of the body) to open the circulation gap, the content in the body can be extruded out of the circulation gap through the pressure difference of the space in the body, and the content flows out through the auxiliary column flow channel and the liquid discharge flow channel, and the liquid discharge is pressed; after going out the liquid and accomplishing, still remain partial content in the pressing piece, at this moment, release pressing piece, the principal post, vice post shifts up rapidly under the drive of elastic component reset action and resets, at this moment, because this internal transient negative pressure effect can drive the resorption post progressively rebound in order to separate and realize this is internal with the second opening that the content in the bottle gets into, and this internal negative pressure effect can drive vice post runner, go out the interior remaining content backward flow of liquid runner to this internal, it equals to reach the balance until this internal pressure and ambient pressure. Through the arrangement, the utility model discloses a suck-back press pump device has realized having avoided the waste to the backward flow of remaining content in the play liquid runner.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the application, and that other drawings can be derived from these drawings by a person skilled in the art without inventive effort.

For a more complete understanding of the present application and its advantages, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. Wherein like reference numerals refer to like parts in the following description.

Fig. 1 is a schematic view of a suck-back and press pump device according to an embodiment of the present invention;

fig. 2 is a schematic view of a pressing state of a suck-back pressing pump device according to an embodiment of the present invention.

Description of the reference numerals

10. A suck-back push pump device; 100. a body; 110. a first end portion; 111. a first outward flange; 112. a second outer flanging; 120. a second end portion; 131. a first limit piece; 132. a second limiting member; 1321. a limiting cavity; 1322. a first opening; 1323. a second opening; 141. a first boss; 200. a main column; 300. a secondary column; 310. sealing the end; 311. a second boss; 400. a back suction column; 410. a hemispherical structure; 500. a movable member; 510. a first abdicating groove; 520. a second abdicating groove; 600. an elastic member; 700. a pressing member; 710. a connecting end; 720. a liquid outlet end; 730. a liquid outlet flow passage; 800. a straw; 900. a valve assembly; 1000. a nozzle; 1100. a locking cover; 1200. a gasket; 1300. a flow-through gap; 1310. a flow-through opening.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, more than, etc. are understood as excluding the term, and the terms greater than, less than, etc. are understood as including the term. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The embodiment of the application provides a suck-back pressing pump device 10 to solve the problem that the existing pressing suction head is high in cost, limited in appearance and poor in suck-back effect. The following description will be made with reference to the accompanying drawings.

Fig. 1 and fig. 2 show an exemplary suck-back pressing pump device 10 according to an embodiment of the present application, where fig. 1 is a schematic structural diagram of the suck-back pressing pump device 10 according to the embodiment of the present application, and fig. 2 is a schematic structural diagram of the suck-back pressing pump device 10 according to the embodiment of the present application after being pressed. The suck-back pump device 10 of the present application can be used for liquid pressing and dispensing applications such as foods (soy sauce, edible oil, vinegar, etc.), bath products (shampoo, body wash, etc.), and the like.

In order to more clearly explain the structure of the suck-back pressure pump device 10, the suck-back pressure pump device 10 will be described below with reference to the drawings.

Referring to fig. 1, an exemplary suck-back and push pump device 10 includes a body 100, a main post 200, a sub-post 300, a suck-back post 400, a movable member 500, an elastic member 600, a push member 700, and a suction tube 800.

The body 100 is a tubular structure, and the body 100 has a first end 110 and a second end 120. Second end 120 is coupled to straw 800. The inner wall of the body 100 is provided with a first protruding limiting member 131, a first boss 141 and a second protruding limiting member 132. The first boss 141 and the protruding second retaining member 132 are close to the first end portion 110. The first boss 141 and the second limiting member 132 are both close to the second end 120.

The main column 200, the sub column 300, the suck back column 400 and the movable member 500 are disposed in the body 100.

The main column 200 has a hollow structure. The end of the main column 200 facing the first end 110 is connected to a pressing member 700. The pressing member 700 has a liquid outlet passage 730. The elastic member 600 is sleeved on the main column 200, and two ends of the elastic member 600 are respectively abutted against the first limiting member 131 and the pressing member 700. The elastic member 600 is sleeved on the main column 200 and is of an external structure, and the external arrangement can prevent the elastic member 600 from contacting with pumped contents, so that the use safety is improved.

One end of the sub-column 300 is embedded in the main column 200, the other end of the sub-column 300 extends to the outside of the main column 200 toward the second end 120 and the end forms a sealing end 310 capable of sealing and matching with the first boss 141. There is a flow-through gap 1300 between the outer wall of the secondary post 300 and the inner wall of the primary post 200. A flow opening 1310 communicated with the flow gap 1300 is formed between the end surface of the main pillar 200 facing the second end 120 and the sealing end 310, and the sub pillar 300 has a sub pillar flow passage, not shown in the drawings, for communicating the liquid outlet flow passage 730 with the flow gap 1300. The sub-column flow passage may be formed in the inner wall of the sub-column 300, or may utilize a hollow cavity of the sub-column 300.

The suck back column 400 is connected to the sub-column 300 in a dynamic sealing manner and one end of the suck back column facing the second end 120 can be in sealing engagement with the second limiting member 132.

The movable member 500 is a hollow cylindrical structure, and the auxiliary column 300 is inserted into the movable member 500. The outer wall of the movable member 500 is in contact engagement with the inner wall of the body 100. The movable member 500 is movable within the flow gap 1300, the movable member 500 closes the flow opening 1310 when the primary and secondary posts 200, 300 are in the reset state, and the movable member 500 opens the flow opening 1310 when the primary and secondary posts 200, 300 are in the at least partially depressed state.

In some embodiments, moveable member 500 is a hollow, generally flat, cylindrical structure.

In some of these embodiments, the radial dimension of the inner wall of the second end portion 120 is smaller than the radial dimension of the inner wall of the first end portion 110, for example, when the body 100 is a cylindrical structure, the inner diameter of the second end portion 120 is smaller than the inner diameter of the first end portion 110. For example, referring to fig. 1 and 2, the second end 120 narrows gradually (from top to bottom in fig. 1). The narrowing of the second end 120 can facilitate mounting of the straw 800. In addition, the narrowing of the second end 120 facilitates forming the first ledge 141 as described above to sealingly engage the sealing end 310. When installed, the straw 800 is embedded in the second end 120, and the straw 800 is in interference fit with the second end 120 to prevent the straw 800 from falling off. Preferably, straw 800 is fixedly attached to second end 120.

In some embodiments, the second retaining member 132 is closer to the second end 120 than the first boss 141. The second limiting member 132 has a limiting cavity 1321, and a first opening 1322 and a second opening 1323 communicating with the limiting cavity 1321. The first opening 1322 communicates with the inner cavity of the body 100. The second opening 1323 communicates with the straw 800. The end of the suckback column 400 is located within the stopper cavity 1321 for sealing engagement with the inner wall of the stopper cavity 1321 to open or close the second opening 1323.

Preferably, the inner wall of the limiting chamber 1321 is curved. The end of the suck back column 400 is located in the limiting chamber 1321 and is at least partially spherical. The end of the suckback post 400 can sealingly engage the inner wall of the stopper cavity 1321 to close the second opening 1323. The suck back column 400 is capable of moving under the pressure differential within the interior of the body 100 to effect sealing and closing of the second opening 1323.

In some embodiments, the first opening 1322 is a circular opening, the second opening 1323 is a circular opening, the end of the suck back column 400 located in the limiting chamber 1321 is a hemispherical structure 410, the diameter of the first opening 1322 is smaller than the maximum diameter of the hemispherical structure 410, and the diameter of the second opening 1323 is smaller than the maximum diameter of the hemispherical structure 410. Since the size of the first opening 1322 and the second opening 1323 are smaller than the size of the end of the hemispherical structure 410 of the suck back column 400, the hemispherical structure 410 will not be separated from the limiting chamber 1321, specifically, when the pressing member 700 is pressed down, the hemispherical structure 410 of the suck back column 400 will abut against the second opening 1323 and seal the second opening 1323, and when the pressing member 700 is released, the suck back column 400 will rise and abut against the first opening 1322 to close the first opening 1322. It should be noted that the end of the suck back column 400 located in the limiting chamber 1321 is not limited to the hemispherical structure 410, but may be other curved structures.

In some embodiments, the suction post 400 and the hemispherical structure 410 are integrally formed during the manufacturing process, i.e., the suction post 400 and the hemispherical structure 410 are integrally formed. The integrated suck-back column 400 is convenient to process on one hand, convenient to operate on the other hand, and high in suck-back efficiency.

In some embodiments, the end surface of the moveable member 500 facing the first end 110 has a first relief groove 510. The inner wall of the first receding groove 510 can be in contact engagement with the end of the main column 200. When the primary post 200 moves in synchronization with the secondary post 300, the end of the primary post 200 toward the second end 120 can be in contact engagement with the inner wall of the first abdicating groove 510.

In some of these embodiments, the end surface of the moveable member 500 facing the second end 120 can be in sealing engagement with the secondary post 300. Moveable member 500 may be a piston. The end surface of the movable member 500 facing the second end 120 has a second relief groove 520, so that the section of the movable member 500 is H-shaped (see fig. 1 and 2). The second receding groove 520 can save materials of the moving member 500, and increase the space for storing contents in the body 100.

In some of these embodiments, the secondary post 300 projects outwardly as a second boss 311 toward the sealing end 310 of the second end 120. The maximum radial dimension of second boss 311 is greater than the minimum radial dimension of moveable member 500. The end surface of the movable member 500 facing the second end 120 can be in sealing engagement with the second boss 311. The second boss 311 is also movable into sealing engagement with the first boss 141 of the body 100.

In some of these embodiments, the radial dimension of the inner wall of the end of the main column 200 toward the second end 120 gradually increases outward, for example, a flared structure gradually increases outward. The end of the main column 200 that gradually increases outward can be used for the movable member 500 to be embedded, as shown in fig. 1 and fig. 2, a part of the inner wall of the movable member 500 is embedded in the horn-shaped structure, and the outer wall of the movable member 500 is in contact fit with the inner wall of the body 100, so that the movable member 500 can move between the horn-shaped structure and the second boss 311 of the secondary column 300, and the movable member 500 functions to close and open the circulation gap 1300.

Further, in one embodiment, as shown in fig. 1, the depth of the trumpet-shaped structure is not greater than the depth of the first abdicating groove 510, so that it can be ensured that when the pressing member 700 is pressed, after the main column 200 moves a distance, the movable member 500 moves with a delay due to the friction force of the inner wall of the main body 100, and the movable member 500 is separated from the second boss 311 (as shown in fig. 2), and the depth of the trumpet-shaped structure is not greater than the depth of the first abdicating groove 510, and it can be ensured that the trumpet-shaped structure continuously pushes the movable member 500 to move downwards.

In some of these embodiments, the resilient member 600 is a plastic spring, such as a food grade plastic spring. Preferably, the main body 100, the main column 200, the auxiliary column 300, the suck back column 400, the movable member 500, the pressing member 700 and the suction pipe 800 are all made of food grade plastic materials. In this embodiment, elastic component 600 is food level plastic spring, avoids metal structure to the recovery influence of whole structure, when the suck-back is pressed pump device 10 and is needed the recovery processing, and no metal waste can be realized to whole product, accords with environmental protection development trend.

In some embodiments, the pressing member 700 is bent to form a connection end 710 and a liquid outlet end 720. The connecting end 710 is connected with the main column 200, the end of the liquid outlet end 720 is bent towards the second end 120, so that the end of the liquid outlet end 720 faces the bottom of the bottle body after the suck-back pressing pump device 10 is installed on the bottle body, and the liquid outlet channels 730 are arranged in the connecting end 710 in a preset manner on the liquid outlet end 720. The end of the liquid outlet end 720 of the suck-back pressing pump device 10, which is arranged on the bottle body, faces the bottom of the bottle body, so that liquid can be discharged downwards after being pressed, and the use habit of consumers is met.

In some of these embodiments, the press 700 may be a conventional press head structure.

In some embodiments, the side wall of the secondary column 300 is provided with a plurality of liquid inlet through holes. The inlet liquid through-hole opening is in circulation clearance 1300, and the inlet liquid through-hole is used for communicating vice post runner and circulation clearance 1300.

In some of these embodiments, the suck back pump device 10 further includes a valve assembly 900. The valve assembly 900 is connected to the outlet 720 for closing or opening the outlet 720.

In some of these embodiments, the suck-back pressure pump device 10 further includes a nozzle 1000. The nozzle 1000 is connected to an end of the pressing member 700 and communicates with the outlet flow path 730, and the valve assembly 900 is connected to the nozzle 1000 for closing or opening the nozzle 1000.

In some of these embodiments, the valve assembly 900 may be a manual valve or an automatic valve. For example, in the manual valve, the valve assembly 900 is provided as a cap, the cap is connected to the nozzle 1000 by a connection string, and the cap can be engaged with the end of the nozzle 1000 by an external force. It will be appreciated that in other embodiments, the valve assembly 900 may be an automatic valve, and may be configured with a valve, a sensor, and a drive motor that drives the valve to close when the sensor detects that the nozzle 1000 is no longer dispensing fluid. Further, the number of the valve assemblies 900 may be one or more.

In some of these embodiments, the suck-back compression pump apparatus 10 further includes a lock cover 1100. The locking cap 1100 is sleeved and connected to the first end portion 110.

In some embodiments, the inner wall of the locking cap 1100 has internal threads, and the locking cap 1100 is used to screw the bottle body. In some embodiments, the locking cap 1100 can be directly snap-fit with the bottle without providing internal threads, and the bottle needs to be correspondingly snap-fitted.

In some of these embodiments, the suck-back compression pump apparatus 10 further includes a gasket 1200. The port of the first end portion 110 has a first outward turned-up edge 111 and a second outward turned-up edge 112, a locking groove is formed between the first outward turned-up edge 11 and the second outward turned-up edge 112, the cover surface of the locking cover 1100 is embedded in the locking groove, and the gasket is further connected to the inner surface of the first outward turned-up edge 111 and/or the second outward turned-up edge 112 facing the second end portion 120. The gasket 1200 functions as a seal between the locking cap 1100 and the mouth of the bottle body. The gasket 1200 is an annular structure, and the gasket 1200 may be a food grade seal ring.

In some embodiments, the body 100 may include a first tube and a second tube, wherein one end of the first tube is provided with the first flange 111, one end of the second tube is provided with the second flange 112, the first tube is embedded in the second tube, and a locking groove is formed between the first flange 111 and the second flange 112. In this embodiment, the first tube and the second tube are provided to facilitate the assembly of the locking cover 1100.

In some of these embodiments, straw 800 is a plastic hose. Further, the plastic hose is a food grade plastic hose. The length of the straw 800 may be set as desired.

In some embodiments, the valve assembly 900, the nozzle 1000, the locking cap 1100, and the gasket 1200 may be made of food grade plastic.

It should be noted that, in an embodiment, when the secondary column 300 is a hollow structure, the secondary column flow channel may be a hollow cavity of the secondary column 300, that is, at this time, there is no need to provide a secondary column flow channel on the secondary column 300, at this time, the hollow cavity of the secondary column 300 is communicated with the corresponding liquid inlet through hole, and the hollow cavity of the secondary column 300 is further communicated with the liquid outlet flow channel 730. Because the suck-back column 400 is in dynamic seal fit with the sub-column 300, based on the restriction effect of the second limiting member 132, when the sub-column 300 rises, the suck-back column 400 moves downward relatively, and the occupied space (hollow cavity) of the sub-column 400 is released, so that negative pressure is formed in the hollow cavity of the sub-column 300, and then the liquid in the liquid outlet channel 733 is sucked back into the hollow cavity of the sub-column 300, thereby realizing the suck-back function.

When the suck-back press pump device 10 is used, the suck-back press pump device 10 is installed on a bottle body, the press member 700 is pressed for the first time, the press member 700 drives the main column 200 and the auxiliary column 300 to move downwards and simultaneously compress the elastic member 600, the body 100 is extruded, the space in the body 100 is gradually reduced and gradually pressurized, when the press member 700 is released, a transient negative pressure is formed in the space in the body 100 at an instant, after the press member 700 is released, the press member 700, the main column 200 and the auxiliary column 300 rapidly move upwards and reset under the driving of the resetting action of the elastic member 600, at the moment, the suck-back column 400 is driven to move upwards under the action of the transient negative pressure in the body 100 to be separated from the second limiting member 132, so that the content in the bottle body enters the body 100, and the pressure in the body 100 is equal to the external pressure until the pressure in the body 100 is balanced; when liquid needs to be discharged, the pressing piece 700 is pressed again, the pressing piece 700 drives the main column 200 and the auxiliary column 300 to move downwards and simultaneously compress the elastic piece 600, the body 100 is pressed, the space in the body 100 is gradually reduced and gradually pressurized, due to the fact that the inside of the body 100 is in a pressurized state, the content in the body 100 can press the suck-back column 400 to completely fall back and reset and block the second opening 1323, when the pressing piece 700 is continuously pressed, the inner wall of the first abdicating groove 510 is separated from the end portion of the main column 200 (the outer wall of the movable piece 500 receives the friction force effect of the inner wall of the body 100) to open the circulation gap 1300, and the content in the body 100 can be extruded out of the circulation gap 1300 through the pressure difference of the space in the body 100 and flows out through the auxiliary column flow passage and the liquid outlet flow passage 730 to realize pressing liquid discharge; after the liquid is discharged, part of the content remains in the pressing member 700, at this time, the pressing member 700 is released, the pressing member 700, the main column 200 and the auxiliary column 300 are driven by the reset action of the elastic member 600 to rapidly move upwards for resetting, at this time, the instantaneous negative pressure action in the body 100 can drive the suck-back column 400 to gradually move upwards to be separated from the second opening 1323 and enable the content in the bottle body to enter the body 100, and the negative pressure action in the body 100 can drive the content remaining in the auxiliary column flow channel and the liquid discharge flow channel 730 to flow back into the body 100 until the pressure in the body 100 is equal to the external pressure and reaches the balance.

Above-mentioned suck-back presses pressure pump device 10, simple structure, with low costs can reach the food level, easily forms local negative pressure in the pump when using, and the content in the suck-back drain nozzle reduces remaining of drain nozzle content, solves among the prior art problem that the content that the press head structure exists is remaining.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (13)

1. A suck-back pressing pump device is characterized by comprising a body, a main column, an auxiliary column, a suck-back column, a movable piece, an elastic piece, a pressing piece and a suction pipe;

the body is of a tubular structure and is provided with a first end part and a second end part, the second end part is connected with the straw, the inner wall of the body is provided with a first limiting piece, a first boss and a second limiting piece which are protruded, the first limiting piece is close to the first end part, and the first boss and the second limiting piece are close to the second end part;

the main column, the auxiliary column, the suck-back column and the movable piece are all arranged in the body;

the main column is of a hollow structure, one end, facing the first end, of the main column is connected with the pressing piece, the pressing piece is provided with a liquid outlet flow channel, the elastic piece is sleeved on the main column, and two ends of the elastic piece are respectively abutted against the first limiting piece and the pressing piece;

one end of the auxiliary column is embedded in the main column, the other end of the auxiliary column extends to the outside of the main column towards the second end, a sealing end capable of being in sealing fit with the first boss is formed at the other end of the auxiliary column, a circulation gap is formed between the outer wall of the auxiliary column and the inner wall of the main column, a circulation opening communicated with the circulation gap is formed between the end face of the main column towards the second end and the sealing end, the auxiliary column is provided with an auxiliary column flow channel, and the auxiliary column flow channel is used for communicating the liquid outlet flow channel and the circulation gap;

the suck-back column is in dynamic seal connection with the auxiliary column, and one end of the suck-back column, which faces the second end, can be in seal fit with the second limiting piece;

the movable part is hollow columnar structure, the auxiliary column is arranged in a penetrating mode through the movable part, the outer wall of the movable part is in contact fit with the inner wall of the body, the movable part can move in the circulation gap, when the main column and the auxiliary column are in the reset state, the movable part seals the circulation opening, and when the main column and the auxiliary column are in the complete pressing state, the movable part opens the circulation opening.

2. The suck-back compression pump apparatus of claim 1, wherein the second end portion inner wall has a radial dimension that is less than a radial dimension of the first end portion inner wall.

3. The suck-back compression pump apparatus of claim 1, wherein the second retaining member is closer to the second end portion than the first boss, the second retaining member having a retaining cavity and first and second openings communicating with the retaining cavity, the first opening communicating with the internal cavity of the body, the second opening communicating with the suction tube, and an end of the suck-back post being located in the retaining cavity for sealing engagement with an inner wall of the retaining cavity to open or close the second opening.

4. The suck-back compression pump device according to claim 3, wherein the first opening and the second opening are both circular, the end of the suck-back post located in the limiting cavity is of a hemispherical structure, the diameter of the first opening is smaller than the maximum diameter of the hemispherical structure, and the diameter of the second opening is smaller than the maximum diameter of the hemispherical structure.

5. The suck-back pressing pump device according to any one of claims 1 to 4, wherein an end surface of the movable member facing the first end portion is provided with a first relief groove, and when the main column and the auxiliary column move synchronously, an end portion of the main column facing the second end portion can be in contact fit with an inner wall of the first relief groove;

and/or the end surface of the movable piece facing the second end part is provided with a second abdicating groove.

6. The suck-back pressing pump device according to any one of claims 1 to 4, wherein the sealing end of the secondary post facing the second end portion protrudes outward as a second boss, and an end surface of the movable member facing the second end portion is capable of being in sealing engagement with the second boss.

7. A suck-back pressure pump device according to any one of claims 1 to 4, wherein the radial dimension of the main column towards the inner wall of the end of the second end portion increases progressively outwards.

8. The suck-back compression pump apparatus according to any one of claims 1 to 4, wherein the elastic member is a plastic spring;

and/or the suction pipe is a plastic hose.

9. The suck-back pressing pump device according to any one of claims 1 to 4, wherein the pressing member has a connecting end and a liquid outlet end, the connecting end is connected to the main column, and an end of the liquid outlet end is bent toward the second end.

10. A suck-back pressure pump device according to any one of claims 1 to 4, wherein the side wall of the secondary column is provided with a plurality of liquid inlet through holes, the liquid inlet through holes open into the flow gap, and the liquid inlet through holes are used for communicating the flow channel of the secondary column with the flow gap.

11. The suck-back pressure pump device according to claim 9, further comprising a valve assembly connected to the liquid outlet end for closing or opening the liquid outlet end.

12. The suck-back compression pump device according to any one of claims 1 to 4, further comprising a locking cap, wherein the locking cap is sleeved and connected to the first end portion.

13. The suck-back pressing pump device according to claim 12, further comprising a gasket, wherein the port of the first end portion has a first outward flange and a second outward flange, a locking groove is formed between the first outward flange and the second outward flange, the cover surface of the locking cover is embedded in the locking groove, and the gasket is further connected to an inner surface of the first outward flange and/or the second outward flange facing the second end portion.

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