CN210140105U - Pump assembly and container with content discharge function - Google Patents

Abstract

The utility model aims at providing a pump package spare and have content discharge function's container. The utility model provides a pump assembly, because the outer wall of first inner shell lateral wall, the inner wall of second inner shell lateral wall and inner shell roof are injectd and are had first open-ended first cavity, and the first air cavity of first cavity is the sealed chamber of injecing jointly by the inner wall of piston portion, inner shell roof, the outer wall of first inner shell lateral wall and second inner shell lateral wall, therefore the formation in sealed chamber need not additionally to set up the sealing washer to reduced the ageing risk that leads to gas leakage of sealing washer. The utility model provides a container with content discharge function, including above-mentioned pump package spare.

Description

Pump assembly and container with content discharge function

Technical Field

The utility model relates to a pump package spare and have content discharge function's container.

Background

Containers having a content discharge function are frequently used in daily life, for example, bottles containing contents such as cosmetics, shampoo, detergent, or medicine. Such a container having a content discharge function includes a container body, a pump assembly, a head cap, and an extension tube.

The container body is provided with a filling opening for adding contents; the pump assembly comprises a pump main body and a pressure rod, wherein the pump main body is detachably arranged in the liquid filling port in a penetrating mode, the pressure rod is installed on the pump main body, the upper end of the pressure rod protrudes out of the pump main body, and a head cap is installed at the upper end of the pressure rod. One end of the extension pipe is connected to the pump body, and the other end extends to a position below the liquid level of the contents.

The head cap is used for being pressed by a user to drive the pressing rod to be pressed down relative to the pump body, so that the content reserved in the pump body can be discharged out of the pump body through the pressing rod and a channel inside the head cap. After the pressing rod is pressed down to the proper position, the pressing rod needs to be rebounded, so that the pressing rod is suitable for being pressed again, and the pressing rod can drive the pump main body to suck the contents in the container body through the extension pipe in the rebounding process. In prior art, be provided with the spring in the pump main part, the depression bar extrudees the spring at the in-process that pushes down, and after removing external force, the spring can make the depression bar kick-back. The working principle of the pump assembly with spring can be referred to the description in patent document CN 105517914A.

In the prior art, because the spring is made of metal materials, the parts of the pump assembly except the spring are made of plastic materials, which brings a problem to the recycling of the pump assembly as plastic packaging waste. Most national plastic packaging waste recycling standards require that plastic and metal be separately recycled, however, when the pump assembly is recycled as plastic packaging waste, the spring is tightly mounted inside the pump body and is not easy to take out, so that the pump assembly in the prior art is not easy to recycle and can only be discarded as waste.

For solving the difficult technical problem who retrieves of pump package spare, chinese patent CN201910036365.2 discloses a pump package spare and have container of content discharge function, the piston portion of this pump package spare can kick-back under the effect of the resultant of the gas pressure in the gas pressure of first gas chamber and the gas pressure in the second gas chamber, in order to drive the pole body and kick-back, consequently the pump main part need not to set up the spring that is used for making the pole body kick-back, thereby make the pump package spare can all be made by the plastics material, can not mix metal material, and then make the easy recycle of pump package spare.

However, the pump assembly disclosed in chinese patent CN201910036365.2 uses the sealing ring to seal the gap between the first abdicating hole and the rod body, and this sealing method has a poor sealing effect, which easily causes gas leakage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pump package spare, this pump package spare has sealed effectual advantage.

It is still another object of the present invention to provide a container with contents discharge function, including the above-mentioned pump assembly.

The pump assembly for achieving the purpose is suitable for being installed on a container body and comprises a pump main body and a pressure rod; wherein the pump body includes an inner housing;

the inner shell has an inner shell top wall, a first inner shell side wall and a second inner shell side wall; the top wall of the inner shell is provided with a first through hole, and the first inner shell side wall and the second inner shell side wall are respectively connected to the top wall of the inner shell, wherein an abdicating channel is defined by the inner wall of the first inner shell side wall and is communicated with the first through hole; the second inner shell side wall surrounds the first inner shell side wall; the outer wall of the first inner shell side wall, the inner wall of the second inner shell side wall and the inner shell top wall define a first cavity with a first opening;

the compression bar is provided with a bar body, a connecting part and a piston part, and the inner wall of the bar body defines a discharge channel; the rod body penetrates through the first through hole and the abdicating channel; the piston part is arranged in the first cavity and is in slidable sealing contact with the outer wall of the side wall of the first inner shell and the inner wall of the side wall of the second inner shell respectively so as to separate a first air cavity and a second air cavity in the first cavity, wherein the first air cavity is a sealed cavity jointly limited by the piston part, the top wall of the inner shell, the outer wall of the side wall of the first inner shell and the inner wall of the side wall of the second inner shell, and the second air cavity is communicated with the first opening; one end of the connecting part is connected with the rod body, and the other end of the connecting part extends into the second air cavity through the first opening and is connected with the piston part;

the rod body is used for being pressed to drive the piston part to stretch the first air cavity and compress the second air cavity, so that the contents in the container body are discharged through the discharge channel; the piston part is used for rebounding under the action of the resultant force of the gas pressure in the first gas cavity and the gas pressure in the second gas cavity so as to drive the rod body to rebound, and therefore the rod body is suitable for being pressed again.

In one embodiment, the pump body has an air guide passage communicating with the second air chamber; the second air cavity discharges or sucks air through the air guide channel.

In one embodiment, the pump body further comprises an outer housing surrounding the second inner housing sidewall;

the outer wall of the side wall of the second inner shell is in surface-to-surface contact fit with the inner wall of the outer shell, wherein the inner wall of the outer shell is sunken to form the air guide channel.

In one embodiment, the link has a link bottom wall and a link side wall; the bottom wall of the connecting part is provided with a second through hole;

the lower end of the rod body is connected to the bottom wall of the connecting part, wherein the second through hole is communicated with the discharge channel; one end of the side wall of the connecting part is connected with the bottom wall of the connecting part, and the other end of the side wall of the connecting part extends into the second air cavity through the first opening and is connected with the piston part.

In one embodiment, the connecting portion sidewall surrounds the rod body; the outer wall of the rod body, the inner wall of the side wall of the connecting part and the bottom wall of the connecting part define a second cavity with a second opening;

the first inner shell side wall extends into the second cavity through the second opening.

In one embodiment, the pump body further comprises a piston member having a piston body and a fluid conducting tube body; the liquid guide pipe body is provided with a liquid guide channel;

the piston body is in slidable sealing fit with the inner wall of the outer shell to define a content cavity in the outer shell; one end of the liquid guide pipe body is connected with the piston body, wherein one end of the liquid guide channel is communicated with the content cavity; the other end of the liquid guide pipe body extends into the second through hole and the discharge channel and is fixedly connected with the inner wall of the rod body in a sealing mode, and the other end of the liquid guide channel is communicated with the discharge channel.

In one embodiment, a protrusion is disposed on an outer wall of the side wall of the second inner shell; the inner wall of the outer shell is sunken to form a hanging groove;

the air guide channel extends along the axial direction of the outer shell, the hanging groove extends along the circumferential direction of the outer shell, and the air guide channel is communicated with the hanging groove;

the bulges are in sliding fit with the air guide channel in the axial direction of the outer shell, and are in sliding fit with the hanging grooves in the circumferential direction of the outer shell.

In one embodiment, a convex line is arranged on the bottom surface of the hanging groove and used for being clamped with the protrusion so as to prevent the protrusion from exiting the hanging groove.

In one embodiment, the inner wall of the first through hole and/or the inner wall of the side wall of the first inner shell is provided with convex teeth; the outer wall of the rod body is provided with a sliding groove, and the sliding groove extends along the axial direction of the rod body and is in sliding fit with the convex teeth;

the rod body is used for being rotated along the radial direction, so that the inner shell is driven to rotate.

The container with a content discharge function for achieving the object comprises a container body, and the container further comprises a pump assembly as above, wherein the pump assembly is mounted on the container body and is used for discharging the content in the container body.

The utility model discloses an actively advance the effect and lie in: the utility model provides a pump assembly, because the outer wall of first inner shell lateral wall, the inner wall of second inner shell lateral wall and inner shell roof are injectd and are had first open-ended first cavity, and the first air cavity of first cavity is the sealed chamber of injecing jointly by the inner wall of piston portion, inner shell roof, the outer wall of first inner shell lateral wall and second inner shell lateral wall, therefore the formation in sealed chamber need not additionally to set up the sealing washer to reduced the ageing risk that leads to gas leakage of sealing washer. The utility model provides a container with content discharge function, including above-mentioned pump package spare.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of a pump assembly;

FIG. 2 is a side view of the pump assembly;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2, with the plunger in a depressed initial position;

FIG. 4 is a cross-sectional view of the pump assembly with the plunger in a depressed intermediate position;

FIG. 5 is a cross-sectional view of the pump assembly with the plunger in an end-of-depression position;

FIG. 6 is an exploded view of the pump assembly;

FIG. 7 is a schematic view of the gland showing the underside of the gland;

FIG. 8 is a schematic view of the gland showing the top surface of the gland;

FIG. 9 is a front view of the gland;

FIG. 10 is a cross-sectional view of the gland;

FIG. 11 is a schematic view of a gasket;

FIG. 12 is a schematic view of the inner housing showing the top surface of the inner housing;

FIG. 13 is a schematic view of the inner housing showing the bottom surface of the inner housing;

FIG. 14 is a front view of the inner housing;

FIG. 15 is a cross-sectional view of the inner housing;

FIG. 16 is a schematic view of the compression bar;

FIG. 17 is a front view of the compression bar;

FIG. 18 is a cross-sectional view of the strut;

FIG. 19 is a schematic view of the piston member showing a bottom surface of the piston member;

FIG. 20 is a schematic view of the piston member showing a top surface of the piston member;

FIG. 21 is a front view of the piston member;

FIG. 22 is a cross-sectional view of the piston member;

FIG. 23 is a schematic view of the outer housing showing the top surface of the outer housing;

FIG. 24 is a schematic view of the outer housing showing the bottom surface of the outer housing;

FIG. 25 is a front view of the outer housing;

FIG. 26 is a cross-sectional view of the outer housing;

FIG. 27 is a schematic view of a first check valve body;

FIG. 28 is a front view of the first check valve body;

fig. 29 is a schematic view of a container having a content discharge function.

Detailed Description

The present invention will be further described with reference to the following embodiments and drawings, and more details will be set forth in the following description in order to provide a thorough understanding of the present invention, but it is obvious that the present invention can be implemented in various other ways different from those described herein, and those skilled in the art can make similar generalizations and deductions according to the actual application without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited by the contents of the embodiments.

The following discloses embodiments or examples of various implementations of the subject technology. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and are not intended to limit the scope of the present invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

It should be noted that fig. 1 to 29 are only examples, are not drawn to scale, and should not be taken as limiting the scope of the invention.

Referring first to fig. 29, the container 900 having a contents discharge function includes a container body 91, a pump assembly 90, and an extension tube 92.

The container body 91 has a charging port for charging the content 800, and the pump assembly 90 includes a pump main body 1, a pressure lever 2, and a head cap 3; the pump body 1 is detachably arranged in the liquid filling opening in a penetrating way; the pressure rod 2 is installed on the pump body 1 in a pressing way, and the upper end of the pressure rod protrudes out of the pump body 1; the head cap 3 is mounted on the upper end of the pressure lever 2. One end of the extension pipe 92 is connected to the pump body 1, and the other end extends below the liquid level of the content 800.

The head cap 3 is adapted to be pressed by a user to bring the plunger 2 to press down relative to the pump body 1, thereby enabling the contents 800 remaining in the pump body 1 to be discharged out of the pump body 1 through the passageway inside the plunger 2 and the head cap 3. After the plunger 2 is pressed down to the proper position, the plunger 2 needs to be rebounded so that the plunger 2 is suitable for being pressed again, and during the rebounding, the plunger 2 can also drive the pump main body 1 to suck the contents 800 in the container body 91 through the extension pipe 92.

To cause the plunger 2 to rebound, as shown in fig. 1, 2, 3, 4, 5, 6, 12, 13, 14, 15, in one embodiment the pump body 1 comprises an inner housing 12; the inner housing 12 has an inner housing top wall 120, a first inner housing sidewall 121 and a second inner housing sidewall 122; the inner shell top wall 120 has a first through hole 120a, and the first inner shell side wall 121 and the second inner shell side wall 122 are respectively connected to the inner shell top wall 120, wherein the inner wall of the first inner shell side wall 121 defines an abdicating channel 121a, and the abdicating channel 121a is communicated with the first through hole 120 a; the second inner housing sidewall 122 surrounds the first inner housing sidewall 121; the outer wall of the first inner housing side wall 121, the inner wall of the second inner housing side wall 122 and the inner housing top wall 120 define a first cavity 1a having a first opening 1 b; the plunger 2 has a plunger body 20, a connecting portion 22 and a piston portion 21, an inner wall of the plunger body 20 defining a discharge passage 20 a; the rod body 20 is arranged in the first through hole 120a and the abdicating channel 121a in a penetrating way; the piston portion 21 is disposed in the first cavity 1a and slidably and sealingly contacts with the outer wall of the first inner housing side wall 121 and the inner wall of the second inner housing side wall 122, respectively, to partition a first air chamber 12a and a second air chamber 12b inside the first cavity 1a, wherein the first air chamber 12a is a sealed chamber defined by the piston portion 21, the inner housing top wall 120, the outer wall of the first inner housing side wall 121, and the inner wall of the second inner housing side wall 122, and the second air chamber 12b communicates with the first opening 1 b; one end of the connecting part 22 is connected with the rod body 20, and the other end extends into the second air cavity 12b through the first opening 1b and is connected with the piston part 21; the rod body 20 is pressed to drive the piston portion 21 to stretch the first air chamber 12a and compress the second air chamber 12b, so that the contents 800 in the container body 91 are discharged through the discharge passage 20 a; the piston portion 21 is adapted to rebound by the resultant force of the gas pressure in the first gas chamber 12a and the gas pressure in the second gas chamber 12b to bring the rod body 20 to rebound, thereby making the rod body 20 suitable to be pressed again.

Since the piston portion 21 is at the initial position of depression in fig. 3, the shape of the first air chamber 12a is a circular slit shape, and as the piston portion 21 is depressed, the first air chamber 12a is gradually stretched and enlarged as shown in fig. 4 and 5.

Since the outer wall of the first inner casing side wall 121, the inner wall of the second inner casing side wall 122 and the inner casing top wall 120 define the first cavity 1a having the first opening 1b, and the first air chamber 12a of the first cavity 1a is a sealed chamber defined by the piston portion 21, the inner casing top wall 120, the outer wall of the first inner casing side wall 121 and the inner wall of the second inner casing side wall 122, the sealed chamber is formed without additionally providing a sealing ring, thereby reducing the risk of gas leakage caused by aging of the sealing ring.

The first air chamber 12a and the second air chamber 12b are each present with a gas, such as air. The rod body 20 drives the piston portion 21 to move in the first cavity 1a during the pressing process, so that the volume of the first air cavity 12a is increased, i.e., the first air cavity 12a is stretched, and the volume of the second air cavity 12b is decreased, i.e., the second air cavity 12b is compressed.

The first air cavity 12a and/or the second air cavity 12b comprise three specific embodiments for a sealed cavity: namely, the first air cavity 12a and the second air cavity 12b are both sealed cavities; the first air cavity 12a is a non-sealed cavity, for example, communicated with the atmosphere, and the second air cavity is a sealed cavity; the first air chamber 12a is a sealed chamber, and the second air chamber 12b is an unsealed chamber, for example, communicating with the atmosphere.

In the first embodiment, as the rod body 20 is pressed down, the gas pressure in the first gas chamber 12a decreases, and the gas pressure in the second gas chamber 12b increases, so that the gas pressure in the first gas chamber 12a is smaller than the gas pressure in the second gas chamber 12b, and the piston portion 21 can rebound under the resultant force of the gas pressure in the first gas chamber 12a and the gas pressure in the second gas chamber 12b, thereby causing the rod body 20 to rebound. In this embodiment, neither the first air chamber 12a nor the second air chamber 12b is in gas communication with the outside.

In the second embodiment, as the rod body 20 is pressed down, the pressure of the gas in the first gas cavity 12a may be kept constant and may be always equal to the pressure of the atmosphere, and the pressure of the gas in the second gas cavity 12b is increased, resulting in that the pressure of the gas in the first gas cavity 12a is smaller than the pressure of the gas in the second gas cavity 12b, so that the piston portion 21 can rebound under the combined force of the pressure of the gas in the first gas cavity 12a and the pressure of the gas in the second gas cavity 12b, so as to drive the rod body 20 to rebound. In this embodiment, the first air chamber 12a is in gas communication with the outside, and the second air chamber 12b is not in gas communication with the outside.

In the third embodiment, as the rod body 20 is pressed down, the pressure of the gas in the first gas chamber 12a is reduced, and the pressure of the gas in the second gas chamber 12b may be kept constant and may be always equal to the pressure of the atmosphere, resulting in that the pressure of the gas in the first gas chamber 12a is smaller than the pressure of the gas in the second gas chamber 12b, so that the piston portion 21 can rebound under the combined force of the pressure of the gas in the first gas chamber 12a and the pressure of the gas in the second gas chamber 12b to drive the rod body 20 to rebound. In this embodiment, the lever body 20 is easily pressed down in place, which can improve the user's feeling of use. In this embodiment, the second air chamber 12b is in gas communication with the outside, and the first air chamber 12a is not in gas communication with the outside.

In a more specific embodiment, as shown in fig. 3, 4, and 5, the pump main body 1 has an air guide passage 111a, and the air guide passage 111a communicates with the second air chamber 12 b; the second air chamber 12b discharges or sucks air through the air guide passage 111 a. The air guide passage 111a may communicate with the atmosphere, thereby communicating the second air chamber 12b with the atmosphere.

In the above embodiments, the piston portion 21 can rebound under the combined force of the gas pressure in the first gas chamber 12a and the gas pressure in the second gas chamber 12b to drive the rod body 20 to rebound, so the pump main body 1 does not need to be provided with a spring for rebounding the rod body 20, and the pump assembly 90 can be made of plastic material completely, metal material cannot be mixed, and the pump assembly 90 is easy to recycle.

As shown in fig. 3, 4, 5, 6, 23, 24, 25, 26, the pump body 1 further includes an outer casing 11, the outer casing 11 surrounding a second inner casing sidewall 122; the outer wall of the second inner casing side wall 122 is surface-contact fitted with the inner wall of the outer casing 11, wherein the inner wall of the outer casing 11 is recessed to form the air guide passage 111 a. This arrangement makes the pump body 1 compact.

As shown in fig. 3, 4, 5, 16, 17, 18, the link 22 has a link bottom wall 220 and a link side wall 221; the connecting portion bottom wall 220 has a second through hole 220 a; the lower end of the rod body 20 is connected to the connecting portion bottom wall 220, wherein the second through hole 220a communicates with the discharge passage 20 a; one end of the connecting portion side wall 221 is connected to the connecting portion bottom wall 220, and the other end thereof extends into the second air chamber 12b through the first opening 1b and is connected to the piston portion 21.

In a more specific embodiment, the connecting portion sidewall 221 surrounds the lever body 20; the outer wall of the lever body 20, the inner wall of the link side wall 221, and the link bottom wall 220 define a second cavity 2a having a second opening 2 b; the first inner housing sidewall 121 extends into the second cavity 2a through the second opening 2 b. This solution helps to reduce the length of the pump body 1.

As shown in fig. 3, 4, 5, 19, 20, 21, 22, in one embodiment, the pump main body 1 further includes a piston member 13, the piston member 13 having a piston body 130 and a liquid guide tube 131; the liquid guiding pipe body 131 is provided with a liquid guiding channel 131 a; the piston body 130 is slidably and sealingly engaged with the inner wall of the outer housing 11 to define a content chamber 11a within the outer housing 11; one end of the liquid guiding pipe body 131 is connected with the piston body 130, wherein one end of the liquid guiding channel 131a is communicated with the content cavity 11 a; the other end of the liquid guiding pipe body 131 extends into the second through hole 220a and the discharge passage 20a and is fixedly connected with the inner wall of the rod body 20 in a sealing manner, wherein the other end of the liquid guiding passage 131a is communicated with the discharge passage 20 a. This embodiment provides a solution for sucking and pumping the contents 800 into and out of the outer housing 11.

As shown in fig. 12, 13, 23 and 26, the outer wall of the second inner casing side wall 122 is provided with a protrusion 122 a; the inner wall of the outer shell 11 is sunken to form a hanging groove 111 b; the air guide passage 111a extends in the axial direction of the outer casing 11, the hanging groove 111b extends in the circumferential direction of the outer casing 11, and the air guide passage 111a communicates with the hanging groove 111 b; the projection 122a is slidably fitted with the air guide passage 111a in the axial direction of the outer case 11 and with the hanging groove 111b in the circumferential direction of the outer case 11. This arrangement makes it possible to slide the inner case 12 to the bottom of the outer case 11 along the air guide passage 111a in a non-use state, such as a transportation state, reducing the volume. When the use is needed, the inner shell 12 slides to the top of the outer shell 11 again, and rotates to be clamped with the hanging groove 111 b.

In a more specific embodiment, as shown in fig. 23 and 26, the bottom surface of the hanging groove 111b is provided with a convex line 111b-1, and the convex line 111b-1 is used for being engaged with the protrusion 122a to prevent the protrusion 122a from exiting the hanging groove 111 b.

In one embodiment, as shown in fig. 16 and 17, the inner wall of the first through hole 120a and/or the inner wall of the first inner casing side wall 121 is provided with a convex tooth 120 a-1; the outer wall of the rod body 20 is provided with a sliding groove 20b, and the sliding groove 20b extends along the axial direction of the rod body 20 and is in sliding fit with the convex tooth 120 a-1; the shaft body 20 is adapted to be rotated in a radial direction to rotate the inner housing 12.

As shown in fig. 3, 4, 5, 6, 27, 28, the pump body 1 further includes a first check valve body 14; the outer case 11 has a content inlet 11b, the content inlet 11b communicating with the content chamber 11 a; the first check valve body 14 is provided on the content inlet 11b to allow the content 800 in the container body 91 to flow into the content chamber 11a in one direction.

With continued reference to fig. 3, 4, 5, 6, 27, 28, the pump body 1 further includes a second check valve body 15; the second check valve body 15 is provided at the upper end of the stem body 20 to allow the contents 800 in the discharge passage 20 to flow out of the discharge passage 20a in one direction.

The head cap 3 is coupled with the upper end of the rod body 20 to prevent the second check valve body 15 from falling off the upper end of the rod body 20; the connection of the head cap 3 and the rod body 20 may be a screw connection. The head cap 3 communicates with the discharge passage 20a to lead out the content 800 flowing out of the discharge passage 20 a.

Referring to fig. 6, 7, 8, 9, and 10, the pump body 1 further includes a gland 16, and the gland 16 is screwed to an upper end of the outer housing 11 to prevent the inner housing 12 from falling out of the outer housing 11.

As shown in fig. 3, 4, 5, 6 and 11, the pump body 1 further includes a gasket 17, and the gasket 17 is disposed between the upper surface of the inner housing top wall 120 of the inner housing 12 and the gland 16.

More specifically, as shown in fig. 12, the upper surface of the inner housing top wall 120 has a recess 120b, and the gasket 17 is disposed in the recess 120 b.

The gland 16 has a gland through hole 16a, and the gasket 17 has a gasket through hole 17 a; the gland through hole 16a and the washer through hole 17a allow the rod body 20 to pass therethrough.

Fig. 3, 4 and 5 show the process of pressing down and rebounding the press rod 2.

Referring first to fig. 3, the pressing lever 2 is in a pressing initial position. The gas pressure in the first gas chamber 12a and the second gas chamber 12b may be equal, and may be both atmospheric pressure. The content chamber 11a stores therein the content 800 or air. The tapered body 140 of the first check valve body 14 is taper-fitted to the content inlet port 11b so that the content inlet port 11b is in a closed state. The second check valve body 15 has the same structure as the first check valve body 14, and also abuts against the upper end of the rod body 20 under the action of gravity. The plunger 2 is subjected to an external force to start depression from the depression initial position.

Referring again to fig. 4, the plunger 2 is in a depressed intermediate position. As the pressure lever 2 is depressed, the pressure of the gas in the first gas chamber 12a starts to decrease, the pressure of the gas in the second gas chamber 12b becomes equal to the atmospheric pressure, and a gas pressure difference is generated between the first gas chamber 12a and the second gas chamber 12 b. In this process, the tapered body 140 of the first check valve body 14 maintains the taper-fit with the content inlet port 11b such that the content inlet port 11b is in a closed state, and the second check valve body 15 is lifted upward by the pressure of the content 800 or air, thereby opening the discharge passage 20 a.

Referring again to fig. 5, the pressing lever 2 is in the pressing end position. At this time, the contents 800 or air in the contents chamber 11a have been discharged out of the contents chamber 11a to the maximum. The pressure of the gas in the first gas chamber 12a decreases to a minimum value, and the difference in gas pressure between the first gas chamber 12a and the second gas chamber 12b reaches a maximum value. The content inlet 11b is in a closed state, and the second check valve body 15 also abuts against the upper end of the lever body 20 under the influence of gravity. After the external force applied to the pressing rod 2 is removed, the piston portion 21 can rebound under the resultant force of the gas pressure in the first gas chamber 12a and the gas pressure in the second gas chamber 12b, and the pressing rod 2 is driven to rebound from the pressing end position.

The plunger 2 can rebound to the initial depression position shown in fig. 25 and 26 so that the plunger 2 is adapted to be depressed again. In the process of pressing and rebounding the pressing lever 2a plurality of times, the contents 800 or air in the container body 91 are discharged out of the container body 91. During the rebound of the pressing rod 2, the second check valve body 15 is pressed against the upper end of the rod body 20 by the external air pressure to close the discharge passage 20a, and the first check valve body 14 is lifted up to open the content inlet 11b, thereby sucking the content 800 or air into the content chamber 11 a.

When the cap 3 is pressed down at the time of initial use, the pressing rod 2 is moved down, and the air in the content chamber 11a is pushed by the piston member 13 and discharged through the liquid guide passage 131a and the discharge passage 20 a.

Once the head cap 3 is released, the plunger 2 is rebounded to the position before being pushed by the external force due to the negative pressure state of the first air chamber 12 a. Since the piston portion 21 and the rod body 20 are connected by the connecting portion 22, and the liquid guide tube 131 of the piston member 13 is inserted into the bottom of the rod body 20 and is sealingly connected to the inner wall of the rod body 20, the piston member 13 moves upward in the outer housing 11 by the rebound of the pressure lever 2 to generate a negative pressure in the content chamber 11a, the first check valve body 14 is sucked up by the negative pressure to open the content inlet 11b of the outer housing 11, and the content 800 in the container body 91 enters the content chamber 11a through the extension tube 92 by the negative pressure.

When the head cap 3 is pressed downward again, the piston member 13 connected to the rod body 20 compresses the content chamber 11a downward in the outer case 11, so that the content 800 enters the head cap 3 via the liquid guide channel 131a of the liquid guide tube body 131 and the discharge channel 20a of the rod body 20 and is pumped out from the outlet of the head cap 3.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention, and any modifications, equivalent changes and modifications made to the above embodiments by the technical spirit of the present invention fall within the scope of protection defined by the claims of the present invention.

Claims (10)

1. A pump assembly, adapted to be mounted on a container body (91), comprising a pump body (1) and a plunger (2); characterized in that the pump body (1) comprises an inner casing (12);

the inner shell (12) having an inner shell top wall (120), a first inner shell side wall (121) and a second inner shell side wall (122); the inner shell top wall (120) is provided with a first through hole (120a), the first inner shell side wall (121) and the second inner shell side wall (122) are respectively connected to the inner shell top wall (120), wherein the inner wall of the first inner shell side wall (121) defines an abdicating channel (121a), and the abdicating channel (121a) is communicated with the first through hole (120 a); the second inner housing sidewall (122) surrounds the first inner housing sidewall (121); the outer wall of the first inner housing side wall (121), the inner wall of the second inner housing side wall (122) and the inner housing top wall (120) define a first cavity (1a) having a first opening (1 b);

the pressure lever (2) has a lever body (20), a connecting portion (22) and a piston portion (21), an inner wall of the lever body (20) defining a discharge passage (20 a); the rod body (20) is arranged in the first through hole (120a) and the abdicating channel (121a) in a penetrating mode; the piston part (21) is arranged in the first cavity (1a) and is in slidable sealing contact with the outer wall of the first inner shell side wall (121) and the inner wall of the second inner shell side wall (122) respectively so as to separate a first air cavity (12a) and a second air cavity (12b) in the first cavity (1a), wherein the first air cavity (12a) is a sealed cavity jointly defined by the piston part (21), the inner shell top wall (120), the outer wall of the first inner shell side wall (121) and the inner wall of the second inner shell side wall (122), and the second air cavity (12b) is communicated with the first opening (1 b); one end of the connecting part (22) is connected with the rod body (20), and the other end of the connecting part extends into the second air cavity (12b) through the first opening (1b) and is connected with the piston part (21);

the rod body (20) is used for being pressed to drive the piston part (21) to stretch the first air cavity (12a) and compress the second air cavity (12b), so that the contents (800) in the container body (91) are discharged through the discharge channel (20 a); the piston part (21) is used for rebounding under the action of the combination force of the gas pressure in the first gas cavity (12a) and the gas pressure in the second gas cavity (12b) so as to drive the rod body (20) to rebound, and therefore the rod body (20) is suitable for being pressed again.

2. The pump assembly according to claim 1, wherein the pump body (1) has an air guide passage (111a), the air guide passage (111a) communicating with the second air chamber (12 b); the second air chamber (12b) discharges or sucks air through the air guide passage (111 a).

3. The pump assembly of claim 2, wherein the pump body (1) further comprises an outer housing (11), the outer housing (11) surrounding the second inner housing sidewall (122);

the outer wall of the second inner shell side wall (122) is in surface-to-surface contact fit with the inner wall of the outer shell (11), wherein the inner wall of the outer shell (11) is recessed to form the air guide channel (111 a).

4. The pump assembly of claim 3, wherein the connector (22) has a connector bottom wall (220) and a connector side wall (221); the connecting portion bottom wall (220) has a second through hole (220 a);

the lower end of the rod body (20) is connected to the connecting portion bottom wall (220), wherein the second through hole (220a) communicates with the discharge passage (20 a); one end of the connecting portion side wall (221) is connected to the connecting portion bottom wall (220), and the other end thereof extends into the second air chamber (12b) through the first opening (1b) and is connected to the piston portion (21).

5. The pump assembly of claim 4, wherein the connector side wall (221) surrounds the rod body (20); the outer wall of the stem body (20), the inner wall of the link side wall (221) and the link bottom wall (220) define a second cavity (2a) having a second opening (2 b);

the first inner housing side wall (121) protrudes into the second cavity (2a) via the second opening (2 b).

6. The pump assembly of claim 4, wherein the pump body (1) further comprises a piston member (13), the piston member (13) having a piston body (130) and a catheter body (131); the liquid guide pipe body (131) is provided with a liquid guide channel (131 a);

the piston body (130) is in slidable sealing fit with the inner wall of the outer shell (11) to define a content cavity (11a) in the outer shell (11);

one end of the liquid guide pipe body (131) is connected with the piston body (130), wherein one end of the liquid guide channel (131a) is communicated with the content cavity (11 a); the other end of the liquid guide pipe body (131) extends into the second through hole (220a) and the discharge channel (20a) and is fixedly connected with the inner wall of the rod body (20) in a sealing mode, and the other end of the liquid guide channel (131a) is communicated with the discharge channel (20 a).

7. The pump assembly of claim 3, wherein the second inner housing sidewall (122) is provided with a protrusion (122a) on an outer wall thereof; the inner wall of the outer shell (11) is sunken to form a hanging groove (111 b);

the air guide channel (111a) extends along the axial direction of the outer shell (11), the hanging groove (111b) extends along the circumferential direction of the outer shell (11), and the air guide channel (111a) is communicated with the hanging groove (111 b);

the protrusion (122a) is in sliding fit with the air guide channel (111a) in the axial direction of the outer housing (11), and is in sliding fit with the hanging groove (111b) in the circumferential direction of the outer housing (11).

8. The pump assembly according to claim 7, wherein the hanging groove (111b) is provided with a protruding line (111b-1) on a bottom surface thereof, and the protruding line (111b-1) is adapted to engage with the protrusion (122a) to prevent the protrusion (122a) from exiting the hanging groove (111 b).

9. The pump assembly according to claim 7, characterized in that the inner wall of the first through hole (120a) and/or the inner wall of the first inner housing side wall (121) is provided with a protruding tooth (120 a-1);

the outer wall of the rod body (20) is provided with a sliding groove (20b), and the sliding groove (20b) extends along the axial direction of the rod body (20) and is in sliding fit with the convex tooth (120 a-1);

the rod body (20) is adapted to be rotated in a radial direction to thereby rotate the inner housing (12).

10. A container with contents discharge function, comprising a container body (91), characterized in that the container further comprises a pump assembly (90) according to any one of claims 1 to 9, the pump assembly (90) being mounted on the container body (91) and being adapted to discharge the contents (800) in the container body.

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