CONTAINER AND PUMP ASSEMBLY OF THE SAME

Abstract

A container and a pump assembly thereof. The pump assembly (1) comprises a main housing (10), a built-in member (11), and a pressing rod assembly (12), wherein the pressing rod assembly comprises a pressing rod body (120), an inner sleeve member (121), and a piston member (122); in an assembled state, the movement of the inner sleeve member and the piston member in the axial direction of the pressing rod body is limited, and at the same time, a first matching part (1201) of the pressing rod body is in slidable sealing contact with at least one part of the interior of the main housing. The pump assembly having the configuration is easy to manufacture while being ensured to be easily recycled.

Description

1 / 32 “CONTAINER AND PUMP ASSEMBLY THEREOF” Technical Area

[001] The present invention relates to the field of pressable pumps and, in particular, to a container and a pump assembly thereof. Fundamentals

[002] A container with the function of dispensing contents, which may be hand sanitizer, medicine, a cosmetic liquid, shampoo, etc., is frequently used in everyday life. The contents of the container can be dispensed by pressing a pressure rod.

[003] For example, in Chinese Patent Publication No. CN 110155489 A, a pump assembly and a container with the function of discharging the contents are described. In this pump assembly, a first cavity is defined inside an external pump housing, and a piston portion that is in sliding seal contact with the surfaces of the inner and outer side walls of the first cavity is provided in the first cavity, so that the first cavity is divided into a first air cavity and a second air cavity by the piston portion. When a rod connected to the piston portion is pressed, the piston portion can be actuated to stretch the first air cavity and compress the second air cavity, so that the contents in a container body are discharged through a discharge channel.Since the piston portion can return under the action of a resultant force of air pressure in the first air cavity and air pressure in the second air cavity to allow a rod body to return so that the rod body is adapted to be pressed again, no spring is required in the assembly. Petition 870250082430, dated 12 / 09 / 2025, pp. 71 / 102 2 / 32 of the pump is designed to allow the rod body to return, so the entire pump assembly can be made of plastic without mixing in any metallic materials, which in turn makes the pump assembly easy to recycle.

[004] However, the inventors discovered that, for the pump assembly described in Chinese Patent Publication No. CN 110155489 A, the pump assembly needs to meet the requirement that both the piston portion and the piston body be in sliding seal contact with the internal cavity of the pump housing, making the manufacturing process difficult. How to provide a pump assembly that is easy to recycle and also has reduced manufacturing difficulty is a problem that needs to be solved urgently. Summary

[005] One objective of the present invention is to provide a pump assembly that is easy to manufacture and at the same time can be easily recycled.

[006] The pump assembly for achieving the above purpose is adapted to be mounted in the body of a vessel and includes a main housing, an embedded element, and a pressure rod assembly. The main housing has an opening at one end and a lower housing wall at the other end; a pump suction port is provided in the center of the lower housing wall, and the interior of the main housing communicates with the vessel body through the pump suction port. The embedded element can be mounted at one end of the main housing from the opening and includes an upper wall, an inner cylinder wall, and an outer cylinder wall. Petition 870250082430, dated 12 / 09 / 2025, pp. 72 / 102 3 / 32 cylinder both extending downwards from the upper wall, an annular chamber being formed between the outer wall of the cylinder and the inner wall of the cylinder, and the inner wall of the cylinder enclosing a through hole. The push rod assembly includes a push rod body, an inner sleeve element, and a piston element. The push rod body may extend from the through hole into the interior of the main housing, a first coupling portion projecting outwards from the push rod body is provided at one end of the push rod body extending into the interior of the main housing, a second coupling portion is provided on an outer periphery of a main body of the push rod body, and the first coupling portion and the second coupling portion are spaced by a distance in the axial direction of the push rod body.The inner sleeve element can be mounted on an outer periphery of the pressure rod body in a coupled manner, and the second coupling portion is engageable with an end portion of the inner sleeve element to limit the movement of the inner sleeve element in the axial direction of the pressure rod body; and the piston element has a piston portion at one end and a third coupling portion at the other end, and can be mounted on an outer periphery of the inner sleeve element in a coupled manner. In an assembled state, the piston portion is located in the annular chamber and is in sliding seal contact with a surface of the outer wall of the inner wall of the cylinder and a surface of the inner wall of the outer wall of the cylinder, the third coupling portion and the inner sleeve element are located between the first coupling portion and... Petition 870250082430, dated 12 / 09 / 2025, pp. 73 / 102 4 / 32 the second coupling portion, the first coupling portion and the second coupling portion jointly limit the movement of the inner sleeve element and the piston element in the axial direction of the pressure rod body, and the first coupling portion is in sliding seal contact with at least part of the interior of the main housing.

[007] In one or more embodiments, the first coupling portion is a first protruding ring that projects outwards, disposed at one end of the body of the pressure rod, the second coupling portion is a second protruding ring disposed on the main body of the pressure rod, and the third coupling portion is a third protruding ring that projects inwards from the piston element.

[008] In the assembled state, the inner sleeve element and the third protruding ring are fitted between the first protruding ring and the second protruding ring in such a way that there is an interference fit.

[009] In one or more embodiments, a fourth protruding ring projecting towards the interior of the inner sleeve element is provided in the end portion of the inner sleeve element, and the fourth protruding ring engages with the second protruding ring to limit the movement of the inner sleeve element in the axial direction of the pressure rod body.

[0010] In one or more embodiments, the embedded member is mounted at one end of the main housing, and the movement of the embedded member towards the interior of the main housing is limited by at least part of the main housing.

[0011] In one or more forms, the accommodation Petition 870250082430, dated 12 / 09 / 2025, pp. 74 / 102 5 / 32 main includes a first housing and a second housing, with the internal diameter of the first housing being larger than that of the second housing, so that a projection located inside the main housing is formed between the first housing and the second housing.

[0012] The shoulder is able to abut the other end of the embedded member opposite the upper wall to limit the movement of the embedded member towards the interior of the main housing, and the first coupling portion is in sliding seal contact with an inner wall of the second housing.

[0013] In one or more embodiments, a fourth coupling portion is further provided on an outer side of the upper wall of the embedded element and is arranged corresponding to the through hole, and a fifth coupling portion is further provided on the outer periphery of the main body of the pressure rod body.

[0014] An external force is applied to a final portion of the pushrod assembly to allow the pushrod assembly to move toward the bottom wall of the housing until the end of the pushrod body extending into the main housing touches the bottom wall of the housing and, in that state, the fifth coupling portion moves to a position where the fifth coupling portion engages with the fourth coupling portion, and the engagement of the fourth coupling portion with the fifth coupling portion limits further movement of the pushrod assembly toward the inside of the main housing.

[0015] In one or more embodiments, a fourth coupling portion is further provided on an outer side of the wall. Petition 870250082430, dated 12 / 09 / 2025, pp. 75 / 102 6 / 32 of the upper embedded element is arranged corresponding to the through hole, and a fifth coupling portion is further provided on the outer periphery of the main body of the pressure rod body.

[0016] An external force is applied to the end portion of the pushrod assembly to allow the pushrod assembly to move toward the bottom wall of the housing until the fifth coupling portion moves to a position where the fifth coupling portion engages with the fourth coupling portion, the engagement of the fourth coupling portion with the fifth coupling portion limits further movement of the pushrod assembly toward the interior of the main housing and, in this state, the end of the pushrod body that extends into the interior of the main housing is spaced from the bottom wall of the housing by a distance, with the piston portion resting against the shoulder.

[0017] In one or more embodiments, the piston element is provided with a reinforcing portion correspondingly disposed on an outer periphery of the piston portion and, in the state where the fourth coupling portion engages with the fifth coupling portion, the reinforcing portion rests on the shoulder.

[0018] In one or more embodiments, a sixth coupling portion is further provided on the outer periphery of the main body of the pressure rod body, and a seventh coupling portion corresponding to the through hole is provided on the outer side of the upper wall of the embedded element.

[0019] In the state where the fourth coupling portion engages with the fifth coupling portion, an external force Petition 870250082430, dated 12 / 09 / 2025, pp. 76 / 102 An additional 7 / 32 is applied to the end portion of the pressure rod assembly, which allows the fourth coupling portion to be disengaged from the fifth coupling portion and, under the action of the piston portion resting on the shoulder, allows the second coupling portion to be disengaged from the end portion of the inner sleeve element and allows the inner sleeve element and the piston element to move in the axial direction of the pressure rod body.

[0020] The spacing by a distance allows the body of the pressure rod to move further towards the lower wall of the housing until the end of the pressure rod body that extends into the main housing touches the lower wall of the housing and, in this state, the sixth coupling portion moves to a position in which the sixth coupling portion engages with the seventh coupling portion, and the engagement of the seventh coupling portion with the sixth coupling portion limits the movement of the body of the pressure rod inside the main housing.

[0021] In one or more embodiments, the pump assembly further includes a cover disposed on the outer periphery of one end of the main housing, with a central hole in the center of the cover and, in the assembled state, the central hole aligned with the through hole. The fourth coupling portion is an upper surface of the cover and the seventh coupling portion is disposed on the inner periphery of the central hole.

[0022] In one or more embodiments, the main housing further includes an inner cylinder housing and an outer cylinder housing, both projecting upwards from the lower wall of the housing, with the outer cylinder housing located on the periphery. Petition 870250082430, dated 12 / 09 / 2025, pp. 77 / 102 8 / 32 of the inner cylinder housing, so that an annular space is defined between the outer cylinder housing and the inner cylinder housing.

[0023] The embedded member is configured to be movable from a lower position, in which the outer wall of the embedded member cylinder is at least partially located in the annular space, to a higher position in the outer cylinder housing and, during movement, the first coupling portion is in sliding seal contact with an outer wall of the inner cylinder housing.

[0024] In one or more embodiments, a check valve element is provided at the suction port of the pump.

[0025] On the other hand, according to some embodiments of the present invention, a container is also provided for discharging the contents. The container includes a container body and, additionally, a pump assembly, as described above. The pump assembly is mounted on the container body and configured to discharge the contents from the container body.

[0026] The beneficial effects of the present invention are as follows.

[0027] In a container with the pump assembly, the pressure rod assembly returns upwards as a whole, without the need for a spring, to discharge the contents of the container body. Furthermore, the pressure rod body, the inner sleeve element, and the piston element are assembled in a single piece by means of the first coupling portion 1 and the second coupling portion, so that during the manufacturing process it is only necessary to ensure that the piston element is in sliding sealing contact with the surface of the chamber wall. Petition 870250082430, dated 12 / 09 / 2025, pp. 78 / 102 9 / 32 annular and that the end portion of the pressure rod body is in sliding seal contact with the inside of the main housing. This mounting method reduces the machining difficulty of the pressure rod assembly, making the pump assembly as a whole easy to manufacture.

[0028] The above description is only an overview of the technical solutions of the present application. To understand more clearly the technical means of the present application for implementing it in accordance with the content of the description, and to make the objectives, characteristics and advantages above and others of the present application more obvious and understandable, specific implementations of the present application are described below, by way of example. Brief Description of the Drawings

[0029] Several other advantages and benefits will become apparent to those with common knowledge in the field upon reading the following detailed description of the preferred implementations. The attached drawings are provided only to illustrate the preferred implementations, and not to limit the present application. In addition, similar components are indicated by similar reference signs throughout the attached drawings. In the drawings:

[0030] FIG. 1 is a schematic diagram of a container according to some embodiments of the present application;

[0031] FIG. 2 is a schematic front view of a pump assembly according to a first embodiment of the present application;

[0032] FIG. 3 is an exploded schematic view of the pump assembly according to the first embodiment of the present application;

[0033] FIG. 4 is a semi-sectional schematic view of Petition 870250082430, dated 12 / 09 / 2025, pp. 79 / 102 10 / 32 a main accommodation according to the first embodiment of this application;

[0034] FIG. 5A is a schematic perspective view of an embedded element according to the first embodiment of the present application;

[0035] FIG. 5B is a semi-sectional schematic view of the embedded element according to the first embodiment of the present application;

[0036] FIG. 6A is a schematic perspective view of a pressure rod body according to the first embodiment of the present application;

[0037] FIG. 6B is a semi-sectional schematic view of the pressure rod body according to the first embodiment of the present application;

[0038] FIG. 7A is a schematic perspective view of an internal sleeve element according to the first embodiment of the present application;

[0039] FIG. 7B is a semi-sectional schematic view of the inner sleeve element according to the first embodiment of the present application;

[0040] FIG. 8A is a schematic perspective view of a piston element according to the first embodiment of the present application;

[0041] FIG. 8B is a semi-sectional schematic view of the piston element according to the first embodiment of the present application;

[0042] FIGS. 9A to 9D show respectively schematic diagrams of the pump assembly according to the first embodiment of the present application moving to different states;

[0043] FIGS. 10A and 10B show, respectively, Petition 870250082430, dated 12 / 09 / 2025, pages 80 / 102 11 / 32 schematic diagrams of a pump assembly according to a second embodiment of the present application moving to different states; and

[0044] FIGS. 11A and 11B show, respectively, schematic diagrams of a pump assembly according to a third embodiment of the present application moving to different states. Detailed description of the personifications

[0045] The present invention will be described in more detail below with reference to specific implementations and drawings, and further details are explained in the following description to facilitate a complete understanding of the present invention; however, the present invention can obviously be implemented in various ways different from those described herein; a person skilled in the art can make a similar extension and deduction without departing from the connotation of the present invention according to practical applications and, therefore, the scope of protection of the present invention should not be limited to the content of specific implementations.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meanings commonly understood by experts in the field to which this application relates. The terms used herein are intended only to describe specific embodiments, but not to limit this application. The terms include and have, and any variations thereof in the description and claims of this application, as well as the brief description of the drawings above, are intended to encompass the non-exclusive inclusion.

[0047] FIG. 1 shows an example configuration Petition 870250082430, dated 12 / 09 / 2025, pp. 81 / 102 12 / 32 of a 1000 container with the function of discharging contents. The 1000 container includes a pump assembly 1 and a container body 2. The pump assembly 1 is mounted on the container body 2 and configured to discharge the contents clockwise from the container body 2.

[0048] To solve the problem existing in the prior art, on the one hand, the present application provides a pump assembly. The pump assembly provided by the present application is specifically described below with reference to multiple embodiments.

[0049] First implementation:

[0050] FIGS. 2 to 9D show an exemplary configuration of a pump assembly 1, according to the first embodiment of the present application. As described above, the pump assembly 1 is adapted to be mounted on a container body 2.

[0051] It should be understood that the drawings are used merely as examples and are not necessarily drawn to scale, and should not be taken as a limitation to the scope of protection actually claimed for the present invention.

[0052] Referring to FIGS. 2 and 3, the pump assembly 1 includes a main housing 10, an embedded member 11 and a pressure rod assembly 12. The pressure rod assembly 12 includes a pressure rod body 120, an inner sleeve member 121 and a piston member 122. The structures and mounting relationship of the above components are described in more detail below with reference to the figures.

[0053] FIG. 4 shows a schematic semi-sectional view of the main housing 10. The main housing 10 is open and has an opening 100 at one end and a Petition 870250082430, dated 12 / 09 / 2025, pages 82 / 102 13 / 32 lower wall of housing 101 at the other end. A pump suction port 102 is provided in the center of the lower wall of housing 101. As shown in FIG. 1, it can be understood that the interior of the main housing 10 is in communication with the body of the container 2 through the pump suction port 102, so that the CW contents in the body of the container 2 can enter the main housing 10 through the pump suction port 102. It can be understood that, in the structure shown, the lower wall of housing 101 is arranged at a distance from an end portion of the main housing 10 to form a receiving port 103 to facilitate connection with a suction tube 3. The suction tube 3 is configured to direct the CW contents into the main housing 10.In some other suitable embodiments, the lower wall of housing 101 may also be disposed in the end portion of the main housing 10, and the suction tube 3 is connected to the lower wall of housing 101 by means of other connecting structures, such as a quick-release fastener.

[0054] It can be understood that, in the implementation shown, the main part of pump assembly 1 can substantially be a rotating body that rotates around its central axis. Therefore, for convenience, reference can also be made below to a vertical direction (an up-and-down direction in FIG. 2, i.e., a direction along the central axis of pump assembly 1), a radial direction (i.e., a direction radiating outward from the central axis of pump assembly 1 in FIG. 2), and a circumferential direction (i.e., a direction of rotation around the central axis) of pump assembly 10 in FIG. 2. It should be understood that this description does not limit a component Petition 870250082430, dated 12 / 09 / 2025, pages 83 / 102 14 / 32 specific to pump assembly 1 to have a circular cross-section. For example, the main housing 10 and / or the embedded element 11 are not necessarily cylinders with a circular cross-section, but may also be tubular elements with a square, rectangular, etc. cross-section.

[0055] FIG. 5A shows a schematic perspective view of the embedded element 11, and FIG. 5B shows a schematic semi-sectional view of the embedded element 11. Referring to FIGS. From sections 1, 4, and 5B, it can be understood that the embedded element 11 can be mounted at one end of the main housing 10 from the opening 100. The embedded element 11 includes an upper wall 110, an inner cylinder wall 111, and an outer cylinder wall 112. The inner cylinder wall 111 and the outer cylinder wall 112 extend downwards from the upper wall 110, and an annular chamber 113 is formed between the outer cylinder wall 112 and the inner cylinder wall 111. The inner cylinder wall 111 encloses a through hole 114. It can be understood that the through hole 114 is a portion of a hole that passes through the upper wall 110.

[0056] It should be noted that spatial relationship terms such as top, bottom, vertical, high, and low are used here to describe the relationship between an element or feature and other elements or features shown in the drawings, and refer to the orientations in normal states shown in FIG. 1 for ease of description. These spatial relationship terms are intended to include other orientations of the elements or assemblies in use or operation, in addition to the orientations described in the drawings. For example, if the assemblies in the drawings are reversed, the orientation of the element described Petition 870250082430, dated 12 / 09 / 2025, pages 84 / 102 15 / 32, when placed above another element or feature, will be changed to below that other element or feature. Therefore, the spatial relationship descriptors used here should be interpreted accordingly.

[0057] FIG. 6A shows a schematic perspective view of the body of the pressure rod 120, and FIG. 6B shows a schematic semi-sectional view of the body of the pressure rod 120. A discharge channel 1200 is defined in the body of the pressure rod 120, and the discharge channel 1200 is configured to direct the discharge of the contents in a clockwise direction. Referring to FIGS. From 1, 5B and 6B, it can be understood that the body of the pressure rod 120 can extend into the main housing 10 from the through hole 114. A first coupling portion 1201 projecting outward from the body of the pressure rod 120 is provided at one end of the body of the pressure rod 120 extending into the main housing 10, and a second coupling portion 1202 is provided on an outer periphery of the main body of the pressure rod 120.The first coupling portion 1201 and the second coupling portion 1202 are spaced by a distance in an axial direction of the pressure rod body 120. The axial direction of the pressure rod body 120 can be understood as the direction of extension of the axis of the pressure rod body 120.

[0058] FIG. 7A shows a schematic perspective view of the inner sleeve element 121, and FIG. 7B shows a schematic semi-sectional view of the inner sleeve element 121. Referring to FIGS. 1, 6B and 7B, it can be understood that the inner sleeve element 121 can be assembled Petition 870250082430, dated 12 / 09 / 2025, pages 85 / 102 16 / 32 on an outer periphery of the body of the pressure rod 120 in a sheathed form, and the second coupling portion 1202 can fit into an end portion 1210 of the inner sleeve element 121 to limit the movement of the inner sleeve element 121 in the axial direction of the body of the pressure rod 120.

[0059] FIG. 8A shows a schematic perspective view of the piston element 122, and FIG. 8B shows a schematic semi-sectional view of the piston element 122. Referring to FIGS. 1, 6B, 7B and 8B, it can be understood that the piston element 122 can be mounted on an outer periphery of the inner sleeve element 121 in a manner similar to a sleeve. The piston element 122 has a piston portion 1220 at one end and a third coupling portion 1221 at the other end.

[0060] FIGS. 9A to 9D show, respectively, schematic diagrams of the pump assembly 1 moving to different states. In an assembled state, as shown in FIG. 1, the piston portion 1220 is located in the annular chamber 113 and is in sliding seal contact with a surface of the outer wall of the inner wall of the cylinder 111 and a surface of the inner wall of the outer wall of the cylinder 112; In the assembled state, the third coupling portion 1221 of the piston element 122 and the inner sleeve element 121 are both located between the first coupling portion 1201 and the second coupling portion 1202, and the first coupling portion 1201 and the second coupling portion 1202 jointly limit the movement of the inner sleeve element 121 and the piston element 122 in the axial direction of the pressure rod body 120, that is, the pressure rod body 120, the inner sleeve element Petition 870250082430, dated 12 / 09 / 2025, pages 86 / 102 17 / 32 121 and the piston element 122 are assembled as an integral piece by means of the first coupling portion 1201 and the second coupling portion 1202. Furthermore, the first coupling portion 1201 is in sliding sealing contact with at least part of the interior of the main housing 10.

[0061] It can be understood that the expression “sliding seal contact” means that two elements are sliding relative to each other, maintaining the seal between the sliding fit interfaces, which, for example, can be achieved through the self-deformability of a material, such as plastic, or by providing sufficient areas at the sliding fit interfaces. For example, the outer diameter of the inner wall of cylinder 111 can be adjusted to be slightly larger than the inner diameter of the piston portion 1220 under normal conditions (i.e., when no external force is applied), so that an interference fit can be formed between them, achieving better sealing performance. It can also be understood that, taking “the outer diameter of the inner wall of cylinder 111” as an example, the outer diameter refers to the diameter of a surface of the inner wall of cylinder 111 located on an outer radial side.

[0062] In this state, when pressure is applied to the end portion of the pressure rod body 120, the integral piece formed by the pressure rod body 120, the inner sleeve element 121 and the piston element 122 can be actuated to move within the main housing 10 and can move from the state shown in FIG. 9A to the state shown in FIG. 9B or from the state shown in FIG. 9B to the state shown in FIG. 9C during the movement. Petition 870250082430, dated 12 / 09 / 2025, pages 87 / 102 18 / 32

[0063] Furthermore, as shown in FIG. 1, a check valve element 4 is provided at the suction port of pump 102 of pump assembly 1. When pressure is applied to the end of the pressure rod body 120 to move it to the state shown in FIG. 9C, pump assembly 1 and the entire container 1000 exhibit small vertical dimensions and a compact structure. It is worth noting that the suction port of pump 102 is always closed by the check valve element 4 (substantially inverted cone shape, as shown) during this process, so that the contents in a clockwise direction in the container body 20 do not flow out.

[0064] When necessary, the body of the pressure rod 120 can be lifted and moved from FIG. 9C to FIG. 9B and to FIG. 9A. During this process, the check valve element 4 gradually opens the suction port of the pump 102, and part of the contents in a clockwise direction is directed from the container body 2 to the main housing 10 under the action of air pressure, accumulating between the first coupling portion 1201 at the bottom of the body of the pressure rod 120 and the lower wall of the housing 101.

[0065] In the state shown in FIG. 9A, when the body of the pressure rod 120 is pressed to move from the state shown in FIG. 9A to the state shown in FIG. 9C, since the piston portion 1220 can vertically separate the annular chamber 113 into a lower chamber 113A and a closed upper chamber 113B (as shown in FIG. 9B), as the body of the pressure rod 120 moves downwards with the piston portion 1220, the pressure difference between the lower chamber 113A and the upper chamber 113B gradually increases, thus providing a restoring force. Petition 870250082430, dated 12 / 09 / 2025, pp. 88 / 102 19 / 32 elastic for the piston portion 1220 to return upwards. An elastic restoring force for upward return is applied to both the pressure rod body 120 and the inner sleeve element 121 by the piston portion 1220, through the first coupling portion 1201 and the second coupling portion 1202, i.e., providing an elastic restoring force to allow the pressure rod assembly 12 to return upwards as a whole. It is worth mentioning that, during the process of Figures 9A to 9B and 9C, the check valve element 4 gradually closes the suction port of the pump 102. After repeatedly lifting and pressing the pressure rod body 120, sufficient content (CW) accumulates between the first coupling portion 1201 at the bottom of the pressure rod body 120 and the lower wall of the housing 101, and is then discharged through the discharge channel 1200.For the specific process of discharging the contents by pressing, please refer to Chinese patent CN 109649819 A, which will not be repeated here.

[0066] Therefore, in a container 1000 that has the pump assembly 1 described above, the pressure rod assembly 12 returns upwards as a whole, without the need for a spring, to discharge the contents clockwise from the body of the container 2.

[0067] Furthermore, the body of the pressure rod 120, the inner sleeve element 121 and the piston element 122 are assembled in one integral piece by means of the first coupling portion 1201 and the second coupling portion 1202, so that, during a manufacturing process, it is only necessary to ensure that the piston element 122 is in sliding sealing contact with the wall of the annular chamber. Petition 870250082430, dated 12 / 09 / 2025, pages 89 / 102 20 / 32 113 and that the final portion of the pressure rod body 120 is in sliding sealing contact with the interior of the main housing 10. This mounting method reduces the machining difficulty of the pressure rod assembly 12, making the pump assembly 1 as a whole easy to manufacture.

[0068] In the description of the embodiments of this application, technical terms such as first and second are used merely to distinguish between different objects and cannot be understood as indicating or implying relative importance or implicitly indicating a number, a specific order or a primary / secondary relationship of the technical characteristics indicated. In the description of the embodiments of this application, the expression a plurality of means two or more, unless otherwise explicitly and specifically defined.

[0069] It may be understood that two perpendicular, consistent, parallel, and similar orientations mentioned here need not meet the strict requirements for angles in the mathematical sense, but allow a certain range of tolerance, for example, differing from the angle required in the mathematical sense by 20° or less. Furthermore, the expression along a direction or in a direction means that there is at least one component in that direction, preferably at an included angle of 45° or less, or more preferably at an included angle of 20° or less, or even at an included angle of 10° or less, or at an included angle of 5° or less in that direction. It may be further understood that, unless otherwise indicated, all ranges mentioned here include the endpoint values ​​mentioned.

[0070] Optionally, in some implementations Petition 870250082430, dated 12 / 09 / 2025, pages 90 / 102 21 / 32 specific to the first embodiment, as shown in FIG. 6A, the first coupling portion 1201 and the second coupling portion 1202 are each a salient ring structure projecting from the body of the pressure rod 120. The salient ring structure can be understood as a ring-shaped structure projecting outward from the outer contour of the body of the pressure rod 120. Specifically, the first coupling portion 1201 can be a first salient ring projecting outward, disposed at one end of the body of the pressure rod 120, and the second coupling portion 1202 can be a second salient ring projecting from the main body of the pressure rod 120. Furthermore, as shown in FIG. 8B, the third coupling portion 1221 is also a salient ring, that is, a third salient ring, projecting from an inner lateral surface of the piston element 122 towards the interior of the piston element 122.In the assembled state, as shown in FIG. 1, the inner sleeve element 121 and the third protruding ring are fitted between the first protruding ring and the second protruding ring in an interference fit manner, that is, the inner sleeve element 121 and the third protruding ring are fixed between the first protruding ring and the second protruding ring in an interference fit manner, so that the pressure rod body 120, the inner sleeve element 121 and the piston element 122 are assembled in one integral piece. In some other optional embodiments, the first coupling portion 1201 and / or the second coupling portion 1202 and / or the third coupling portion 1221 may be of other configurations different from the protruding ring structure, such as a quick-fit structure or a... Petition 870250082430, dated 12 / 09 / 2025, pages 91 / 102 22 / 32 hook structure, which can limit the relative movement of the pressure rod body 120, the inner sleeve element 121 and the piston element 122.

[0071] Furthermore, based on the embodiment described above, optionally, a fourth protruding ring 1211, projecting towards the interior of the inner sleeve element 121, is provided in the end portion 1210 of the inner sleeve element 121, and the fourth protruding ring 1211 engages with the second protruding ring to limit the movement of the inner sleeve element in the axial direction of the pressure rod body. With the arrangement of the fourth protruding ring 1211 engaging with the second protruding ring, instead of the end portion of the inner sleeve element 121 being configured directly to engage with the second protruding ring, the fourth protruding ring 1211 can be elastically deformed when a sufficiently large external force is applied, so that the fourth protruding ring 1211 is disengaged from the second protruding ring, i.e., in a contact-fitting state, so as to facilitate the disassembly of the pressure rod assembly 12.

[0072] Referring again to FIGS. 9A and 9B, in the first embodiment, the embedded member 11 is mounted at one end of the main housing 10, and the movement of the embedded member 11 towards the interior of the main housing 10 is limited by at least part of the main housing 10, i.e., the embedded member 11 mounted at one end of the main housing 10 does not have the freedom to move towards the interior of the main housing 10.

[0073] Specifically, in one embodiment, as shown in FIG. 4, the main housing 10 includes a first housing 10A and a second housing 10B, wherein the Petition 870250082430, dated 12 / 09 / 2025, pages 92 / 102 The inner diameter of the first housing 10A is greater than the inner diameter of the second housing 10B, so that a protrusion 104 located inside the main housing 10 is formed between the first housing 10A and the second housing 10B. In the assembled state shown in FIGS. 9A to 9C, the protrusion 104 can abut the other end 115 of the embedded element 11, opposite the upper wall 110, to limit the movement of the embedded element 11 towards the inside of the main housing. That is, it can be understood that, in the positioning state, as shown, the embedded element 11 is supported on an upper surface of the protrusion 104. Furthermore, in this embodiment, the first coupling portion 1201 is in sliding sealing contact with the inner wall of the second housing 10B.Optionally, in some other embodiments different from the embodiment shown, the embedded element 11 may be fixedly connected to one end of the main housing 10 by means of, for example, a quick-fit connection, which may also limit the movement of the embedded element 11 towards the interior of the main housing 10. However, with the arrangement of the second housing 10B having a smaller inner diameter, the first coupling portion 1201, i.e., the first protrusion, is in sliding sealing contact with the inner wall of the main housing 10 without needing to project much.

[0074] Furthermore, still referring to FIGS. 9A to 9C, in the first embodiment, a fourth coupling portion 51 is further provided on the outer side of the upper wall 110 of the embedded element 11, the fourth coupling portion 51 is arranged corresponding to the through hole 114 of the upper wall 110, and a fifth portion of Petition 870250082430, dated 12 / 09 / 2025, pp. 93 / 102 The 24 / 32 coupling 1203 is further provided on the outer periphery of the main body of the pressure rod assembly 120. An external force is applied to the end portion of the pressure rod assembly 12 to allow the pressure rod assembly 12 to move towards the lower wall of the housing 101 until it moves to the state shown in FIG. 9C, and in this state, the fifth coupling portion 1203 moves to a position where it engages with the fourth coupling portion 51, and the engagement of the fourth coupling portion 51 with the fifth coupling portion 1203 limits the further extension of the pressure rod assembly 12 towards the interior of the main housing 10. Furthermore, in this state, the end of the pressure rod body 120 that extends into the interior of the main housing is spaced from the lower wall of the housing 101 by a distance H, with the piston portion 1220 abutting the shoulder 104.

[0075] Furthermore, referring to FIGS. 8B and 9C, the piston element 122 is also provided with a reinforcing portion 1222. The reinforcing portion 1222 is correspondingly disposed on the outer periphery of the piston portion 1220, and when the fourth coupling portion 51 engages with the fifth coupling portion 1203, the reinforcing portion 1222 abuts the shoulder 104. The arrangement of the reinforcing portion 1222 can improve the strength of the piston portion 1220, so that even under a large external force, the piston portion 1220 is not prone to deformation due to abutting the shoulder 104.

[0076] Furthermore, referring to FIGS. 9A to 9D, a sixth coupling portion 1204 is further provided on the outer periphery of the main body of the pressure rod body 120, and a seventh coupling portion 52 is arranged Petition 870250082430, dated 12 / 09 / 2025, pages 94 / 102 25 / 32 corresponding to the through hole 114 is further provided on the outer side of the upper wall 110 of the embedded element 11. When the fourth coupling portion 51 engages with the fifth coupling portion 1203, as shown in FIG. 9C, an additional external force is applied to the end portion of the pressure rod assembly 12 to allow the fourth coupling portion 51 to be disengaged from the fifth coupling portion 1203 and, at the same time, as the piston portion 1220 abuts the shoulder 104, under the interaction between them, an external force can be applied to the second coupling portion 1202 to allow the second coupling portion 1202 to be disengaged from the end portion of the inner sleeve element 121 and allow the inner sleeve element 121 and the piston element 122 to move in the axial direction of the pressure rod body 120.In this embodiment, in a preferred implementation, a fourth protruding ring 1211 is provided on the end portion 1210 of the inner sleeve element 121, such that when a sufficiently large external force is applied, the fourth protruding ring 1211 can deform elastically to allow the fourth protruding ring 1211 to be disengaged from the second protruding ring, i.e., in a contact-fitting state. When the fourth protruding ring 1211 is disengaged from the second protruding ring, the piston portion 1220 is pushed upwards under the action of air pressure, so as to cause the piston element 122 and the inner sleeve 121 to return along the body of the pressure rod 120 to the embedded element 11, as shown in FIG. 9D. Furthermore, during the change from the state shown in FIG. 9C to the state shown in FIG. 9D, the spacing by the distance H allows for additional movement of the pressure rod body 120 towards the lower wall of the. Petition 870250082430, dated 12 / 09 / 2025, pp. 95 / 102 26 / 32 housing 101 until the end of the pressure rod body 120, extending into the main housing, touches the lower wall of housing 101. In this state, the sixth coupling portion 1204 moves to a position where it engages with the seventh coupling portion 52, and the engagement of the sixth coupling portion 1204 with the seventh coupling portion 52 limits the movement of the pressure rod body 120 within the main housing 10. Furthermore, in the state shown in FIG. 9D, the pressure rod body 120 cannot move up or down in the main housing 10. That is, the pressure rod body 120 is locked in position when the sixth coupling portion 1204 engages with the seventh coupling portion 52. In the state shown in FIG.9D, pulling the pressure rod body 120 upwards under an external force allows the sixth coupling portion 1204 to be disengaged from the seventh coupling portion 52, so as to restore the pressure rod body 120 to the state shown in FIG. 9A. Through the design described above, the volume of the pump assembly can be compressed in the stored state, so that when the pump assembly is used in a container, most of it can be stored in the container, thus improving the portability of the pump assembly and the container holding the pump assembly. Furthermore, since the piston portion 1220 withstands higher gas pressure when the piston element 122 moves to a relatively low position, if the pump assembly is stored in this state, the piston portion 1220 itself will suffer significant wear over time.By design, when the body of the 120 pressure rod is compressed into the main housing 10, the distance H is reserved, so. Petition 870250082430, dated 12 / 09 / 2025, pages 96 / 102 27 / 32 that the pressure rod body 120 can first be disengaged from the piston member 122 and the inner sleeve member 121 to allow the piston member 122 and the inner sleeve member 121 to return, and then the pressure rod body 120 that extends further out from the container body is stored, which ensures the storage capacity of the pump assembly itself and can also prevent wear of the piston portion 1220, extending the service life of the pump assembly.

[0077] Optionally, as shown in FIGS. 9A to 9D, the pump assembly further includes a cover 5 disposed on the outer periphery of one end of the main housing 10, a central hole 50 is provided in the center of the cover 5 and, in the assembled state, the central hole 50 is aligned with the through hole 114. The fourth coupling portion 51 is an upper surface of the cover 5 and, correspondingly, the fifth coupling portion 1203 is a protruding ring or protrusion disposed on the outer periphery of the pressure rod body 120, and the protruding portion abuts the upper surface of the cover 5 to limit the further extension of the pressure rod body 120 into the main housing 10. The seventh coupling portion 52 is disposed on an inner periphery of the central hole 50.Specifically, in the embodiment shown, the seventh coupling portion 52 is an annular groove disposed on the inner periphery of the central hole 50, and the sixth coupling portion 1204 is a protruding ring or protrusion disposed on the outer periphery of the pressure rod body 120. The protruding ring or protrusion is secured with the annular groove to lock the pressure rod body 120 in the cover 5. Obviously, in some other suitable embodiments, the seventh coupling portion... Petition 870250082430, dated 12 / 09 / 2025, pages 97 / 102 28 / 32 may also be a protrusion, and the corresponding sixth coupling portion 1204 may be an annular groove. In another embodiment, the cover 5 may not be provided, and a ring-shaped element may be provided projecting from the outer part of the upper wall 110 of the embedded element 11, and the fourth coupling portion and the seventh coupling portion are arranged in the ring-shaped element.

[0078] The expression “embodiment” mentioned here means that the specific features, structures or characteristics described in conjunction with the embodiment can be encompassed by at least one embodiment of the present invention. This expression, in various places in the description, does not necessarily refer to the same embodiment, or to an independent or alternative embodiment that excludes another embodiment. Skilled individuals understand, explicitly or implicitly, that the embodiment described herein can be combined with another embodiment. Second Mode

[0079] In the second modality, there are variants or alterations compared to the first modality, and only the variants or alterations are described below.

[0080] FIGS. 10A and 10B show schematic diagrams of the second embodiment. In the second embodiment, a fourth coupling portion is also provided on the outer face of an upper wall 110' of an embedded element 11', and the fourth coupling portion can be understood as the upper surface of the cover in the first embodiment. The fourth coupling portion is arranged corresponding to a through hole 114', and a fifth coupling portion 1203' is provided on the outer periphery of a main body of a pressure rod body 120'. Petition 870250082430, dated 12 / 09 / 2025, pages 98 / 102 29 / 32

[0081] In the second embodiment, when an external force is applied to a final portion of a pressure rod assembly, the pressure rod assembly can be moved towards the lower wall of the housing 101' until one end of the pressure rod body 120', extending into the main housing, touches the lower wall of the housing 110', i.e., as shown in Figure 10B. In this state, the fifth coupling portion 1203' moves to a position where it engages with the fourth coupling portion, i.e., for example, where it touches the upper surface of the cover in the first embodiment, and the engagement of the fourth coupling portion with the fifth coupling portion 1203' limits the further movement of the pressure rod assembly towards the interior of the main housing 10'.

[0082] That is, compared with the first embodiment, in the second embodiment, when the fourth coupling portion touches the fifth coupling portion 1203', the body of the pressure rod 120' and the lower wall of the housing 101' also touch each other and are not spaced by the distance H as described in the first embodiment. Third option

[0083] In the third modality, there are variations or changes compared to the first modality, and only the variations or changes are described below.

[0084] FIGS. 11A and 11B show schematic diagrams of the third embodiment. In the third embodiment, the main housing does not have a first or second housing, but includes an inner cylinder housing 1001 and an outer cylinder housing 1002, both projecting outwards. Petition 870250082430, dated 12 / 09 / 2025, pages 99 / 102 30 / 32 upwards from a lower wall of the housing 101''. The outer cylinder housing 1002 is located on the periphery of the inner cylinder housing 1001, so that an annular space 1003 is defined between the outer cylinder housing and the inner cylinder housing. An embedded element 11'' is configured to be movable in the outer cylinder housing 1002 from a higher position to a lower position, in which the outer wall of the cylinder of the embedded element 11'' is at least partially located in the annular space 1003. That is, when an external force is applied to an end portion of a pushrod assembly, the embedded element 11'' moves towards the lower wall of the housing 101'' along with the pushrod assembly. Furthermore, during the movement, the first coupling portion 1201'' is in sliding seal contact with an outer wall of the inner cylinder housing 1001.

[0085] In this embodiment, as the embedded element 11'' moves towards the lower wall of the housing 101'' along with the pressure rod assembly, it is also possible to facilitate the storage of the pump assembly.

[0086] On the other hand, according to some embodiments of the present invention, a container with the function of discharging the contents is also provided. As shown in Figure 1, the container includes a container body 2 and a pump assembly 1, as described above. The pump assembly 1 is mounted on the container body 2 and configured to discharge the contents clockwise from the container body 2.

[0087] In the description of the modalities of this application, the term and / or is intended only to describe the Petition 870250082430, dated 12 / 09 / 2025, pp. 100 / 102 31 / 32 relationship of associated objects, indicating that there can be three relationships, for example, A and / or B, which may include: only A exists, A and B exist, and only B exists. Additionally, the / character here usually indicates that the associated objects before and after the character are in an OR relationship.

[0088] In describing embodiments of the present invention, unless explicitly specified and defined otherwise, technical terms such as assemble, connected, connect, and fix shall be interpreted broadly, for example, they may refer to a fixed connection, a detachable connection, or integration; they may be a mechanical connection or an electrical connection; and they may be a direct or indirect connection by means of an intermediate medium, and may be communication between the interiors of two elements or interaction between two elements. For those with common technical knowledge, the specific meaning of the terms mentioned above in embodiments of the present invention shall be interpreted according to the specific circumstances.

[0089] Finally, it should be noted that the above embodiments are merely used to illustrate, and not to limit, the technical solutions of this application. Although the present application has been illustrated in detail with reference to the previous embodiments, it should be understood by those with common knowledge in the field that the technical solutions described in the previous embodiments may still be modified, or some or all of their technical features may be equivalently substituted; and such modifications or substitutions do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solutions of the embodiments of this application, and should Petition 870250082430, dated 12 / 09 / 2025, pp. 101 / 102 32 / 32 if it falls within the scope of the claims and description of this application. In particular, the technical features mentioned in the embodiments may be combined in any way, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims. Petition 870250082430, dated 12 / 09 / 2025, p. 102 / 102

Claims

1 / 8 CLAIMS 1. Pump assembly (1) suitable for mounting on a container body (2) characterized in that it comprises: a main casing having an opening (100) at one end and a lower wall of the casing at the other end, a pump suction port (102) provided in the center of the lower wall of the casing, and the interior of the main casing being in communication with the container body (2) through the pump suction port;an embedded element (11) mountable at one end of the main housing (10) from the opening (100) and comprising an upper wall (110), an inner cylinder wall (111) and an outer cylinder wall (112), the inner cylinder wall (111) and the outer cylinder wall (112) both extending downwards from the upper wall (110), an annular chamber being formed between the outer cylinder wall (112) and the inner cylinder wall (111), and the inner cylinder wall (111) enclosing a through hole (114);and a compression rod assembly comprising: a pressure rod body (120) extending from the through hole (114) into the main housing (10), a first coupling portion (1201) projecting outward from the pressure rod body (120) being provided at one end of the pressure rod body (120) extending into the main housing (10), a second coupling portion (1202) being provided on an outer periphery of a main body of the pressure rod body (120), and the first coupling portion (1201) and the second coupling portion (1202) Petition 870250084655, dated 09 / 19 / 2025, page 9 / 25 2 / 8 being spaced by a distance in an axial direction from the pressure rod body (120);an inner sleeve member (121) mountable on an outer periphery of the pressure rod body (120) in a coupled manner, the second coupling portion (1202) being engageable with an end portion (1210) of the inner sleeve member (121) to limit the movement of the inner sleeve member (121) in the axial direction of the pressure rod body (120); and a piston member (122) having a piston portion (1220) at one end and a third coupling portion (1221) at the other end, and mountable on an outer periphery of the inner sleeve member (121) so as to form a sleeve;wherein, in an assembled state, the piston portion is located in the annular chamber and is in sliding seal contact with a surface of the outer wall of the inner wall of the cylinder (111) and a surface of the inner wall of the outer wall of the cylinder (112), the third coupling portion (1221) and the inner sleeve member (121) are located between the first coupling portion (1201) and the second coupling portion (1202), the first coupling portion (1201) and the second coupling portion (1202) jointly limit the movement of the inner sleeve member (121) and the piston element in the axial direction of the pressure rod body (120), and the first coupling portion (1201) is in sliding seal contact with at least part of the interior of the main housing (10).

2. Pump assembly (1), according to claim 1, characterized in that the first coupling portion (1201) is a first protruding ring projecting outwards, disposed at one end of the pressure rod body (120), the second coupling portion (1202) is a second protruding ring disposed on the main body of the pressure rod body (120), and the third coupling portion (1221) is a third protruding ring projecting towards the interior of the piston element; wherein, in the assembled state, the inner sleeve member (121) and the third protruding ring are fitted between the first protruding ring and the second protruding ring in an interference fit.

3. Pump assembly (1), according to claim 2, characterized in that a fourth protruding ring (1211) projecting towards the interior of the inner sleeve member (121) is provided in the end portion (1210) of the inner sleeve member (121), and the fourth protruding ring (1211) engages with the second protruding ring to limit the movement of the inner sleeve member (121) in the axial direction of the pressure rod body (120).

4. Pump assembly (1), according to claim 1, characterized in that the embedded element (11) is installed at one end of the main housing (10), and the movement of the embedded element (11) towards the interior of the main housing (10) is restricted by at least part of the main housing (10).

5. Pump assembly (1), according to claim 4, characterized in that the main housing (10) comprises a first housing (10A) and a second housing (10B), the internal diameter of the first housing (10A) being larger than that of the second housing (10B), so as to form a protrusion (104) located within the main housing (10), between the first housing (10A) and the second housing (10B); wherein the protrusion (104) is able to abut the other end of the embedded element (11) opposite the upper wall (110) to limit the movement of the embedded element (11) towards the interior of the main housing (10), and the first coupling portion (1201) is in sliding seal contact with an inner wall of the second housing (10B).

6. Pump assembly (1), according to claim 5, characterized in that a fourth coupling portion (51) is additionally provided on an outer side of the upper wall (110) of the embedded element (11) and is arranged corresponding to the through hole (114), and a fifth coupling portion (1203) is additionally provided on the outer periphery of the main body of the pressure rod body (120);wherein an external force is applied to an end portion (1210) of the pushrod assembly (120) to allow the pushrod assembly (120) to move towards the lower wall of the housing (101) until the end of the pushrod body (120) extending into the main housing (10) touches the lower wall of the housing, and in this state, the fifth coupling portion (1203) moves to a position in which the fifth coupling portion (1203) engages with the fourth coupling portion (51), and the engagement of the fourth coupling portion (51) with the fifth coupling portion (1203) limits further movement of the pushrod assembly (120) towards the interior of the main housing (10). Petition 870250084655, dated 09 / 19 / 2025, p. 12 / 25 5 / 8; 7. Pump assembly (1), according to claim 5, characterized in that a fourth coupling portion (51) is additionally provided on an outer side of the upper wall (110) of the embedded element (11) and is arranged corresponding to the through hole (114), and a fifth coupling portion (1203) is additionally provided on the outer periphery of the main body of the pressure rod body (120);wherein an external force is applied to the end portion (1210) of the pushrod assembly (120) to allow the pushrod assembly (120) to move towards the bottom wall of the housing (101) until the fifth coupling portion (1203) moves to a position in which the fifth coupling portion (1203) engages with the fourth coupling portion (51), the engagement of the fourth coupling portion (51) with the fifth coupling portion (1203) limits the further movement of the pushrod assembly (120) towards the interior of the main housing (10), and in this state, the end of the pushrod body (120) that extends into the interior of the main housing (10) is spaced from the bottom wall of the housing (101) by a distance, with the piston portion resting against the shoulder (104).

8. Pump assembly (1), according to claim 7, characterized in that the piston member (122) is provided with a reinforcing portion (1222) correspondingly disposed on an outer periphery of the piston portion (1220) and, in the state where the fourth coupling portion (51) engages with the fifth coupling portion (1203), the reinforcing portion (1222) rests on the shoulder. Petition 870250084655, dated 19 / 09 / 2025, page 13 / 25 6 / 8 9. Pump assembly (1), according to claim 7, characterized in that a sixth coupling portion (1204) is additionally provided on the outer periphery of the main body of the pressure rod body (120), and a seventh coupling portion (52) arranged corresponding to the through hole (114) is provided on the outer part of the upper wall (110) of the embedded element (11);wherein, in the state in which the fourth coupling portion (51) engages with the fifth coupling portion (1203), an additional external force is applied to the end portion (1210) of the pressure rod assembly (120), which allows the fourth coupling portion (51) to be disengaged from the fifth coupling portion (1203) and, under the action of the piston portion resting on the shoulder (104), allows the second coupling portion (1202) to be disengaged from the end portion (1210) of the inner sleeve member (121) and allows the inner sleeve member (121) and the piston member (122) to move in the axial direction of the pressure rod body (120);and the spacing by a distance allows the body of the pressure rod (120) to move further towards the lower wall of the housing (101) until the end of the body of the pressure rod (120) that extends into the main housing (10) touches the lower wall of the housing (101) and, in this state, the sixth coupling portion (1204) moves to a position in which the sixth coupling portion (1204) engages with the seventh coupling portion (52), and the engagement of the seventh coupling portion (52) with the sixth coupling portion (1204) limits the movement of the body of the pressure rod (120) inside the main housing (10). Petition 870250084655, dated 09 / 19 / 2025, page 14 / 25 7 / 8; 10. Pump assembly (1), according to claim 9, characterized in that it further comprises a cover (5) disposed on an outer periphery of one end of the main housing (10), a central hole is provided in the center of the cover (5) and, in the assembled state, the central hole is aligned with the through hole (114), wherein the fourth coupling portion (51) is an upper surface of the cover (5), and the seventh coupling portion (52) is disposed on an inner periphery of the central hole.

11. Pump assembly (1), according to claim 1, characterized in that the main housing (10) further comprises an inner cylinder housing and an outer cylinder housing, both projecting upwards from the lower wall of the housing, the outer cylinder housing being located on the periphery of the inner cylinder housing, such that an annular space is defined between the outer cylinder housing and the inner cylinder housing; wherein the embedded element (11) is configured to be movable from a lower position, in which the outer wall of the cylinder (112) of the embedded element (11) is at least partially located in the annular space, to a higher position in the outer cylinder housing, and during the movement, the first coupling portion (1201) is in sliding sealing contact with an outer wall of the inner cylinder housing.

12. Pump assembly (1), according to claim 1, characterized in that a check valve element (4) is provided in the suction port of the pump.

13. Container (1000) with a content discharge function, the container (1000) comprising a container body (2), characterized in that the container (1000) further comprises a pump assembly (1), as defined in any one of claims 1 to 12, the pump assembly (1) being mounted on the container body (2) and configured to discharge contents from the container body.

Images