Container and its pump assembly

Abstract

A type of container and its pump assembly are provided. The pump assembly (1) comprises a main housing (10), an internal component (11), and a retaining rod assembly (12), the retaining rod assembly comprising a retaining rod body (120), an inner sleeve (121), and a piston component (122), wherein in the assembled state, the inner sleeve and piston component are restricted from moving along the axial direction of the retaining rod body, and a first engaging portion (1201) of the retaining rod body and at least a portion of the inside of the main housing are in slidable sealing contact. A pump assembly having this configuration is easy to manufacture, assuming that it is easily recyclable.

Description

Technical Field

[0001] The present invention relates to the field of pressing pumps, and particularly to a container and its pump assembly.

Background Art

[0002] In daily life, containers having a function of discharging contents such as hand soap, medicine, lotion, shampoo, etc. are often used. In this container, the contents therein can be discharged by pressing an operating rod.

[0003] Chinese Patent Publication No. CN110155489A describes a pump assembly and a container having a function of discharging contents. In this pump assembly, a first cavity is defined inside a pump housing, and a piston part that is slidably seal - contacted with the inner and outer wall surfaces of the first cavity is provided inside the first cavity, so that the first cavity is separated into a first gas cavity and a second gas cavity by the piston part. When a rod connecting the piston part is pressed, the piston part is driven to pull the first gas cavity and compress the second gas cavity, and the contents in the container body are discharged through a discharge passage. Since the piston part rebounds due to the combined force of the gas pressure in the first gas cavity and the gas pressure in the second gas cavity, and rebounds the rod body, so that the rod body is in a state suitable for being pressed again, in the pump assembly, there is no need to provide a spring for rebounding the rod body, and the entire pump assembly can be made of a plastic material, without mixing metal materials, making the pump assembly easy to recycle.

[0004] However, the inventors discovered that the pump assembly described in the Chinese patent publication number CN110155489A requires simultaneous slidable seal contact between the piston and piston body and the lumen of the pump housing, which makes the production and manufacturing process difficult. Providing a pump assembly that is easy to recycle while simplifying the production and manufacturing process is a challenge that needs to be addressed. [Overview of the project]

[0005] The objective of the present invention is to provide a pump assembly that ensures ease of production and manufacturing, while also being easy to recycle.

[0006] A pump assembly for achieving the above objective is adapted to be mounted on a container body comprising a main housing, internal components, and a retaining rod assembly. One end of the main housing has an opening, and the other end has a housing bottom wall, with a pump suction port provided in the center of the housing bottom wall, and the interior of the main housing communicates with the container body through the pump suction port. The internal components can be mounted on the one end of the main housing through the opening, and comprise a top wall, an inner cylinder wall, and an outer cylinder wall, the inner cylinder wall and the outer cylinder wall each extending downward from the top wall, an annular cavity formed between the outer cylinder wall and the inner cylinder wall, and the inner cylinder wall surrounding a through hole. The retaining rod assembly comprises a retaining rod body, an inner sleeve, and a piston component. The retaining rod body can enter the main housing through the through hole, and one end of the retaining rod body that enters the main housing is provided with a first engaging portion that protrudes outward from the retaining rod body, and a second engaging portion is provided on the outer circumference of the body of the retaining rod body, and the first engaging portion and the second engaging portion are spaced apart along the axial direction of the retaining rod body, and the inner sleeve can be fitted onto the outer circumference of the retaining rod body, and the second engaging portion can engage with the end of the inner sleeve to restrict the inner sleeve from moving in the axial direction of the retaining rod body, and one end of the piston part has a piston portion and the other end has a third engaging portion and can be fitted onto the outer circumference of the inner sleeve. Within this, the piston portion, in its assembled state, is located in the annular cavity and slidably seals in contact with the outer wall surface of the inner cylinder wall and the inner wall surface of the outer cylinder wall, respectively. The third engaging portion and the inner sleeve are both located between the first engaging portion and the second engaging portion. Both the first engaging portion and the second engaging portion restrict the inner sleeve and the piston component from moving in the axial direction of the retaining rod body. The first engaging portion slidably seals in contact with at least a portion of the inside of the main housing.

[0007] In one or more embodiments, the first engaging portion is a first convex ring provided at one end of the retaining rod body and protruding outward, the second engaging portion is a second convex ring provided on the body of the retaining rod body, and the third engaging portion is a third convex ring provided and protruding inward toward the piston component.

[0008] In this assembly, the inner sleeve and the third convex ring are fitted together between the first convex ring and the second convex ring by an interference fit.

[0009] In one or more embodiments, the end of the inner sleeve has a fourth convex ring projecting inward from the inner sleeve, the fourth convex ring engaging with the second convex ring to restrict the inner sleeve from moving in the axial direction of the retaining rod body.

[0010] In one or more embodiments, the internal component is attached to one end of the main housing and is restricted by at least a portion of the main housing from moving toward the interior of the main housing.

[0011] In one or more embodiments, the main housing comprises a first housing and a second housing, wherein the first housing has a larger inner diameter than the second housing such that a shoulder portion is formed between the first housing and the second housing, which is located inside the main housing.

[0012] Within this, the shoulder portion can abut against the other end of the internal component facing the top wall so as to restrict the internal component from moving toward the interior of the main housing, and the first engaging portion slidably seals with the inner wall of the second housing.

[0013] In one or more embodiments, a fourth engaging portion is further provided on the outside of the top wall of the internal member, the fourth engaging portion is provided corresponding to the through hole, and a fifth engaging portion is further provided on the outer circumference of the body of the retaining rod body.

[0014] In this state, an external force is applied to the end of the retaining rod assembly so that the retaining rod assembly moves toward the bottom wall of the housing until one end of the retaining rod body that has entered the interior of the main housing contacts the bottom wall of the housing. In this state, the fifth engaging portion moves to a position where it engages with the fourth engaging portion, and the engagement between the fourth engaging portion and the fifth engaging portion restricts further movement of the retaining rod assembly into the interior of the main housing.

[0015] In one or more embodiments, a fourth engaging portion is further provided on the outside of the top wall of the internal member, the fourth engaging portion is provided corresponding to the through hole, and a fifth engaging portion is further provided on the outer circumference of the body of the retaining rod body.

[0016] An external force is applied to the end of the retaining rod assembly so that the retaining rod assembly moves toward the bottom wall of the housing to a position where the fifth engaging portion engages with the fourth engaging portion, and the engagement of the fourth and fifth engaging portions restricts the retaining rod assembly from moving further into the main housing, in which case the end of the retaining rod body that has entered the main housing is at a distance from the bottom wall of the housing, and at the same time the piston portion abuts against the shoulder portion.

[0017] In one or more embodiments, the piston component has a reinforcing portion, the reinforcing portion is provided corresponding to the outer circumference of the piston portion, and the reinforcing portion abuts against the shoulder portion when the fourth engaging portion and the fifth engaging portion are engaged.

[0018] In one or more embodiments, a sixth engagement portion is further provided on the outer circumference of the body of the retaining rod, and a seventh engagement portion corresponding to the through hole is further provided on the outer side of the top wall of the internal member.

[0019] In this configuration, while the fourth engaging portion and the fifth engaging portion are engaged, an external force is continuously applied to the end of the retaining rod assembly to release the engagement between the fourth engaging portion and the fifth engaging portion, and the contact action between the piston portion and the shoulder portion releases the engagement between the second engaging portion and the end of the inner sleeve, allowing the inner sleeve and the piston component to move in the axial direction of the retaining rod body.

[0020] Maintaining a distance allows the retaining rod body to continue moving toward the bottom wall of the housing until one end of the retaining rod body that has entered the main housing comes into contact with the bottom wall of the housing. In this state, the sixth engaging portion moves to a position where it engages with the seventh engaging portion, and the engagement between the seventh engaging portion and the sixth engaging portion restricts the movement of the retaining rod body within the main housing.

[0021] In one or more embodiments, the main housing further comprises a cover provided on the outer circumference of one end, the cover having a central hole in its center, the central hole and the through hole being aligned with each other in the assembled state, the fourth engaging portion being the upper surface of the cover and the seventh engaging portion being the inner circumference of the central hole.

[0022] In one or more embodiments, the main housing further comprises an inner cylinder housing and an outer cylinder housing projecting upward from the bottom wall of the housing, the outer cylinder housing being located on the outer circumference of the inner cylinder housing and defining an annular space between it and the inner cylinder housing.

[0023] Within this, the internal component is provided so as to be movable from a low position to a high position within the outer cylinder housing, and at the lower position, the outer cylinder wall of the internal component is at least partially located within the annular space, and at the same time, during movement, the first engaging portion slidably seals in contact with the outer wall of the inner cylinder housing.

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

[0025] On the other hand, according to some embodiments of the present application, a container having a function of discharging the content is also provided. The container includes a container body and the pump assembly as described above. The pump assembly is attached to the container body and discharges the content in the container body.

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

[0027] The container equipped with the pump assembly of the present application does not need to install a spring, and at the same time, it realizes that the entire press bar assembly rebounds upward to discharge the content from the container body. At the same time, by assembling the press bar body, the inner sleeve and the piston part integrally through the first engaging part and the second engaging part, during the production and manufacturing process, it is only necessary to ensure the slidable sealing contact between the piston part and the annular cavity wall surface, and the slidable sealing contact between the end of the press bar body and the inside of the main housing respectively. This assembly and forming method simplifies the difficulty of processing and manufacturing the press bar assembly, and makes the entire pump assembly easier to be produced and manufactured.

[0028] The above description is only an overview of the technical solution of the present application. In order to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. Also, in order to understand the above and other objects, features and advantages of the present application more clearly and easily, the following specific embodiments of the present application are given.

Brief Description of the Drawings

[0029] By reading the following detailed description of the preferred embodiments, those skilled in the art can clearly understand various other advantages and merits. The drawings are only used for the purpose of showing the preferred embodiments and should not be construed as a limitation of the present application. Also, in all the drawings, the same parts are denoted by the same reference numerals. In the drawings, [Figure 1] It is a schematic diagram of a container according to some embodiments of the present application. [Figure 2] This is a schematic front view of a pump assembly according to the first embodiment of the present application. [Figure 3] This is an exploded schematic diagram of a pump assembly according to the first embodiment of the present application. [Figure 4] This is a schematic half-section drawing of the main housing according to the first embodiment of the present application. [Figure 5A] This is a schematic perspective view of an internal component according to the first embodiment of the present application. [Figure 5B] This is a schematic half-section of an internal component according to the first embodiment of the present application. [Figure 6A] This is a schematic perspective view of the retaining bar body according to the first embodiment of the present application. [Figure 6B] This is a schematic half-section view of the retaining bar body according to the first embodiment of the present application. [Figure 7A] This is a schematic perspective view of an inner sleeve according to the first embodiment of the present application. [Figure 7B] This is a schematic half-section view of an inner sleeve according to the first embodiment of the present application. [Figure 8A] This is a schematic perspective view of a piston component according to the first embodiment of the present application. [Figure 8B] This is a schematic half-cross-sectional view of a piston component according to the first embodiment of the present application. [Figure 9A] A schematic diagram shows the pump assembly according to the first embodiment of the present application when it has moved to different states. [Figure 9B] A schematic diagram shows the pump assembly according to the first embodiment of the present application when it has moved to different states. [Figure 9C] A schematic diagram shows the pump assembly according to the first embodiment of the present application when it has moved to different states. [Figure 9D] A schematic diagram shows the pump assembly according to the first embodiment of the present application when it has moved to different states. [Figure 10A] A schematic diagram shows the pump assembly according to the second embodiment of the present application when it has moved to different states. [Figure 10B] A schematic diagram shows the pump assembly according to the second embodiment of the present application when it has moved to different states. [Figure 11A]A schematic diagram shows the pump assembly according to the third embodiment of the present application when it has moved to different states. [Figure 11B] A schematic diagram shows the pump assembly according to the third embodiment of the present application when it has moved to different states. [Modes for carrying out the invention]

[0030] The present invention will be described in detail below with reference to specific embodiments and accompanying drawings. While various details will be explained below to ensure a thorough understanding of the present invention, it is clear that the present invention can be implemented in forms different from those described herein. Those skilled in the art can extend and infer the present invention according to actual application situations without departing from the spirit of the invention; therefore, it goes without saying that the scope of protection of the present invention is not limited to the content of specific embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as that commonly understood by those skilled in the art of the present application, and the terms used herein are solely for the purpose of describing specific embodiments and are not intended to limit the present application. The terms “equipped with” and “having” and any variations thereof in the description of the present specification, claims, and drawings above are intended to cover non-exclusive inclusion.

[0032] Figure 1 shows an example configuration of a container 1000 having a contents discharge function. The container 1000 comprises a pump assembly 1 and a container body 2, and the pump assembly 1 is attached to the container body 2 to discharge the contents CW from the container body 2.

[0033] To address the problems of the prior art, in one embodiment, the present application provides a pump assembly. The pump assembly provided by the present application will be described in detail below through several embodiments.

[0034] First embodiment: Figures 2 to 9D show an example configuration of the pump assembly 1 according to the first embodiment of the present application. As described above, the pump assembly 1 is suitable for attachment to the container body 2.

[0035] Furthermore, the attached drawings are merely illustrative and are not drawn under conditions of equal proportion; therefore, they should not be considered as limiting the scope of protection actually claimed by this invention.

[0036] Referring to Figures 2 and 3, the pump assembly 1 comprises a main housing 10, an internal component 11, and a retaining rod assembly 12. The retaining rod assembly 12 further comprises a retaining rod body 120, an inner sleeve 121, and a piston component 122. The structure and assembly relationships of the above components will be described in more detail below with reference to the illustrations.

[0037] Figure 4 shows a schematic half-section of the main housing 10, which has an open end 100 and a housing bottom wall 101 at the other end, with a pump suction port 102 in the center of the housing bottom wall 101. As can be seen from Figure 1, the inside of the main housing 10 is in communication with the container body 2 via the pump suction port 102, thereby allowing the contents CW in the container body 2 to enter the main housing 10 via the pump suction port 102. In the structure shown in the figure, the housing bottom wall 101 is located at a distance from the end of the main housing 10 and forms a receiving opening 103 to facilitate connection with the straw 3 that guides the contents CW into the main housing 10. In some other preferred embodiments, the housing bottom wall 101 may be located at the end of the main housing 10, and the straw 3 is connected to the housing bottom wall 101 via other connecting structures such as a snap fit.

[0038] In the illustrated embodiment, the main body of the pump assembly 1 may be a rotating body that rotates approximately around its central axis. Therefore, for convenience, the following description may also refer to the vertical direction (up and down direction in Figure 2, i.e., the direction along the central axis of the pump assembly 1), the radial direction (i.e., the direction radiating outward from the central axis of the pump assembly 1 in Figure 2), and the circumferential direction (i.e., the direction of rotation around the central axis) of the pump assembly 10 in Figure 2. This description does not limit the cross-section of the specific parts of the pump assembly 1 to circular. For example, the main housing 10 and / or internal member 11 do not need to be a cylinder with a circular cross-section; they may be cylindrical bodies with other shapes such as a square or rectangular cross-section.

[0039] Figure 5A shows a schematic perspective view of the internal component 11, and Figure 5B shows a schematic half-section view of the internal component 11. As can be seen from Figures 1, 4, and 5B, the internal component 11 can be attached to one end of the main housing 10 from the opening 100. The internal component 11 comprises a top wall 110, an inner cylindrical wall 111, and an outer cylindrical wall 112. The inner cylindrical wall 111 and the outer cylindrical wall 112 each extend downward from the top wall 110, and an annular cavity 113 is formed between the outer cylindrical wall 112 and the inner cylindrical wall 111. The inner cylindrical wall 111 surrounds a through hole 114. The through hole 114 is a through-hole provided by drilling through the top wall 110.

[0040] In this specification, spatial relation terms such as "up," "down," "vertical," "high," and "low" are used to describe the relationship between one element or feature and another shown in the drawings. This is to facilitate explanation by referring to the orientation in the normal state shown in Figure 1, and these spatial relation terms are intended to include other orientations of the element or assembly in use or operation other than those depicted in the drawings. For example, if the assembly in the attached drawings is inverted, the orientation of an element described as being above another element or feature changes to being below the other element or feature, and the spatial relation terms used in this text should be interpreted accordingly.

[0041] Figure 6A shows a schematic perspective view of the retaining rod body 120, and Figure 6B shows a schematic half-section view of the retaining rod body 120. The retaining rod body 120 defines a discharge passage 1200 inside, which guides the discharge of the contents CW. As can be understood by referring together to Figures 1, 5B, and 6B, the retaining rod body 120 can enter the interior of the main housing 10 through the through hole 114. The retaining rod body 120 has a first engaging portion 1201 that protrudes outward from the retaining rod body 120 at one end that extends into the interior of the main housing 10, and a second engaging portion 1202 is provided on the outer circumference of the body of the retaining rod body 120. The first engaging portion 1201 and the second engaging portion 1202 are arranged at a certain distance from each other along the axial direction of the retaining rod body 120, and the axial direction of the retaining rod body 120 can be understood as the direction in which the axis of the retaining rod body 120 extends.

[0042] Figure 7A shows a schematic perspective view of the inner sleeve 121, and Figure 7B shows a schematic half-section view of the inner sleeve 121. As can be understood by referring together to Figures 1, 6B, and 7B, the inner sleeve 121 can be fitted onto the outer circumference of the retaining rod body 120, and the second engaging portion 1202 can engage with the end portion 1210 of the inner sleeve 121 to restrict the inner sleeve 121 from moving along the axial direction of the retaining rod body 120.

[0043] Figure 8A shows a schematic perspective view of the piston component 122, and Figure 8B shows a schematic half-section view of the piston component 122. As can be understood by referring to Figures 1, 6B, 7B, and 8B, the piston component 122 is extrapolated to the outer circumference of the inner sleeve 121. One end of the piston component 122 has a piston portion 1220, and the other end has a third engaging portion 1221.

[0044] Figures 9A to 9D show schematic diagrams of the pump assembly 1 as it moves to different states. In the assembled state shown in Figure 1, the piston portion 1220 is located in the annular cavity 113 and is in slidable sealing contact with the outer wall surface of the inner cylinder wall 111 and the inner wall surface of the outer cylinder wall 112. In the assembled state, the third engaging portion 1221 of the piston component 122 and the inner sleeve 121 are both located between the first engaging portion 1201 and the second engaging portion 1202. The first engaging portion 1201, together with the second engaging portion 1202, restricts the inner sleeve 121 and the piston component 122 from moving along the axial direction of the retaining rod body 120. In other words, the retaining rod body 120, the inner sleeve 121 and the piston component 122 are assembled as a single unit via the first engaging portion 1201 and the second engaging portion 1202. At the same time, the first engaging portion 1201 slidably seals in contact with at least a portion of the inside of the main housing 10.

[0045] Furthermore, "slidable sealing contact" means that two elements are able to slide relative to each other while simultaneously maintaining a seal between the sliding contact interfaces. This can be achieved, for example, by the deformable properties of the material itself, such as plastic, and by providing a sufficient area of ​​the sliding contact interface to maintain the seal. For example, the outer diameter of the inner cylinder wall 111 can be set to be slightly larger than the inner diameter of the piston portion 1220 under normal conditions (i.e., when no external force is applied), thereby forming an interference fit between them and improving sealing performance. Taking "outer diameter of the inner cylinder wall 111" as an example, it can also be understood that the outer diameter refers to the diameter of the wall surface located radially outward of the inner cylinder wall 111.

[0046] In this state, applying pressure to the end of the retaining rod body 120 allows the entire assembly formed by the retaining rod body 120, inner sleeve 121, and piston component 122 to move inside the main housing 10, and during this movement, it can move from the state shown in Figure 9A to the state shown in Figure 9B, or from the state shown in Figure 9B to the state shown in Figure 9C.

[0047] Furthermore, as shown in Figure 1, a check valve body 4 is provided at the pump suction port 102 of the pump assembly 1. When pressure is applied to the end of the retaining rod body 120 and it is moved to the state shown in Figure 9C, the vertical dimensions of the entire pump assembly 1 and container 1000 are reduced, resulting in a compact structure. Notably, during this process, the pump suction port 102 is always closed via the check valve body 4 (approximately inversely tapered in the figure) without the contents CW in the container body 20 flowing out.

[0048] When necessary for use, the retaining rod body 120 can be lifted and moved from Figures 9C and 9B to Figure 9A. During this process, the check valve body 4 gradually opens the pump suction port 102, and a portion of the contents CW is guided from the container body 2 into the main housing 10 under the action of air pressure, accumulating between the first engaging portion 1201 at the bottom of the retaining rod body 120 and the housing bottom wall 101.

[0049] In the state shown in Figure 9A, when the push rod body 120 is pressed and moved from the state shown in Figure 9A to the state shown in Figure 9C, the piston portion 1220 can partition the annular cavity 113 along the vertical direction into a lower cavity 113A and a closed upper cavity 113B (shown in Figure 9B). As the push rod body 120 moves the piston portion 1220 downward, the differential pressure between the lower cavity 113A and the upper cavity 113B increases, providing an elastic restoring force that causes the piston portion 1220 to rebound upward. On the other hand, the piston portion 1220, via the first engaging portion 1201 and the second engaging portion 1202, imparts an upward elastic restoring force to the push rod body 120 and the inner sleeve 121, that is, the entire push rod assembly 12 provides an elastic restoring force that causes it to rebound upward. Of particular note is that, in the process from Figures 9A and 9B to Figure 9C, the check valve body 4 gradually closes the pump suction port 102. After repeatedly lifting and pressing the retaining rod body 120, a sufficient amount of contents CW accumulates between the first engaging portion 1201 at the bottom of the retaining rod body 120 and the housing bottom wall 101, and is then discharged through the discharge passage 1200. The specific process of discharging the contents by pressing can be found, for example, in Chinese Patent CN109649819A, and will not be explained further here.

[0050] Therefore, the container 1000 equipped with the pump assembly 1 enables the entire retaining rod assembly 12 to rebound upward without the need for a spring, thereby discharging the contents CW from the container body 2.

[0051] At the same time, by assembling the retaining rod body 120, inner sleeve 121, and piston component 122 integrally via the first engaging portion 1201 and the second engaging portion 1202, it is sufficient to ensure slidable seal contact between the piston component 122 and the wall surface of the annular cavity 113, and slidable seal contact between the end of the retaining rod body 120 and the inside of the main housing 10 during the production and manufacturing process. This assembly and molding method simplifies the difficulty of processing and manufacturing the retaining rod assembly 12 and facilitates the production and manufacturing of the entire pump assembly 1.

[0052] In the description of the embodiments of this application, the technical terms “first” and “second” are used solely to distinguish different subjects and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features displayed, a particular order, or the relationship between primary and secondary elements. In the description of the embodiments of this application, “multiple” means two or more unless otherwise specifically limited.

[0053] Furthermore, the terms "perpendicular," "coincident," and "parallel" of the two directions mentioned in this text do not need to satisfy mathematically strict angle requirements, and allow for a certain range of error, for example, allowing for a difference of up to 20° from the mathematically required angle. Terms such as "along a certain direction" or "in a certain direction" mean that there is at least one component in that direction, and preferably the angle with that direction is within 45°, more preferably within 20°, or within 10° or 5°. In addition, all ranges mentioned in this text include the endpoint values ​​of the references.

[0054] Alternatively, in some specific embodiments of the first embodiment, as shown in Figure 6A, the first engaging portion 1201 and the second engaging portion 1202 are convex ring structures protruding from the retaining rod body 120, and these convex ring structures can be understood as annular structures formed protruding outward from the outer casing of the retaining rod body 120. Specifically, the first engaging portion 1201 is a first convex ring provided at one end of the retaining rod body 120 and protruding outward, and the second engaging portion 1202 may be a second convex ring protruding from the body of the retaining rod body 120. At the same time, as shown in Figure 8B, the third engaging portion 1221 is also a convex ring protruding from the inner surface of the piston component 122 toward the inside of the piston component 122, i.e., a third convex ring. In the assembled state shown in Figure 1, the inner sleeve 121 and the third convex ring are assembled in an interference fit between the first convex ring and the second convex ring, that is, the inner sleeve 121 and the third convex ring are locked in an interference fit between the first convex ring and the second convex ring, so that the retaining rod body 120, the inner sleeve 121 and the piston part 122 are assembled integrally. In some other alternative embodiments, the first engaging part 1201 and / or the second engaging part 1202 and / or the third engaging part 1221 may be other configurations different from the convex ring structure, such as a snap structure or a hook structure, which can restrict the relative movement of the retaining rod body 120, the inner sleeve 121 and the piston part 122.

[0055] Furthermore, based on the above embodiment, or the end 1210 of the inner sleeve 121 has a fourth convex ring 1211 projecting inward from the inner sleeve 121, and the fourth convex ring 1211 engages with the second convex ring to restrict the inner sleeve from moving along the axial direction of the retaining rod body. By engaging the fourth convex ring 1211 with the second convex ring rather than directly engaging the end of the inner sleeve 121 with the second convex ring, the fourth convex ring 1211 can be elastically deformed to release its engagement with the second convex ring, i.e., to a contact engagement state, when sufficient external force is applied, thereby facilitating the disassembly of the retaining rod assembly 12.

[0056] Continuing to refer to Figures 9A to 9B, in the first embodiment, the internal component 11 is attached to one end of the main housing 10, and at least a part of the main housing 10 restricts the internal component 11 from moving toward the interior of the main housing 10. In other words, the internal component 11 attached to one end of the main housing 10 does not have the freedom to move toward the interior of the main housing 10.

[0057] Specifically, in one embodiment, as shown in Figure 4, the main housing 10 comprises a first housing 10A and a second housing 10B, and the first housing 10A is larger than the inner diameter of the second housing 10B so that a shoulder portion 104 located inside the main housing 10 is formed between the first housing 10A and the second housing 10B, and in the assembled state shown in Figures 9A to 9C, the shoulder portion 104 abuts against the other end 115 of the internal member 11 facing the top wall 110, thereby restricting the internal member 11 from moving toward the interior of the main housing. That is, in the arrangement shown in the figures, the internal member 11 can be understood as being supported on the upper surface of the shoulder portion 104. At the same time, in this embodiment, the first engaging portion 1201 is in slidable sealing contact with the inner wall of the second housing 10B. Alternatively, in some other embodiments different from those shown in the figures, the internal member 11 can also be fixedly connected to one end of the main housing 10, for example by a snap connection, and serve to restrict the internal member 11 from moving toward the interior of the main housing 10. However, by providing the second housing 10B with a smaller inner diameter, the first protrusion, which is the first engaging portion 1201, can be made to slidably seal and contact the inner wall of the main housing 10 without having to make it protrude significantly.

[0058] Furthermore, referring to Figures 9A to 9C, in this first embodiment, a fourth engaging portion 51 is provided on the outside of the top wall 110 of the internal member 11, and the fourth engaging portion 51 is provided corresponding to the through hole 114 of the top wall 110, and a fifth engaging portion 1203 is provided on the outer circumference of the body of the retaining rod body 120. When an external force is applied to the end of the retaining rod assembly 12, and the retaining rod assembly 12 moves toward the housing bottom wall 101 to the state shown in Figure 9C, in this state, the fifth engaging portion 1203 moves to a position where it engages with the fourth engaging portion 51, and the engagement between the fourth engaging portion 51 and the fifth engaging portion 1203 restricts the retaining rod assembly 12 from moving further toward the interior of the main housing 10. At the same time, in this state, one end of the retaining rod body 120 that enters the main housing is separated from the housing bottom wall 101 by a distance H, and the piston portion 1220 comes into contact with the shoulder portion 104.

[0059] Furthermore, referring to Figures 8B and 9C, the piston component 122 further includes a reinforcing portion 1222 provided corresponding to the outer circumference of the piston portion 1220, and in the engaged state of the fourth engaging portion 51 and the fifth engaging portion 1203, the reinforcing portion 1222 abuts against the shoulder portion 104. By providing the reinforcing portion 1222, the strength of the piston portion 1220 can be increased, and even if a large external force is applied, the piston portion 1220 will be less likely to deform due to abutment with the shoulder portion 104.

[0060] Furthermore, referring to Figures 9A to 9D, a sixth engagement portion 1204 is provided on the outer circumference of the body of the retaining rod body 120, and a seventh engagement portion 52 is provided on the outside of the top wall 110 of the internal member 11, corresponding to the through hole 114. Within this, in the engaged state of the fourth engagement portion 51 and the fifth engagement portion 1203 shown in Figure 9C, by continuously applying an external force to the end of the retaining rod assembly 12, the engagement between the fourth engagement portion 51 and the fifth engagement portion 1203 can be released. Also, since the piston portion 1220 and the shoulder portion 104 come into contact, the interaction between the two allows an external force to be applied to the second engagement portion 1202, releasing the engagement between the second engagement portion 1202 and the end of the inner sleeve 121, and allowing the inner sleeve 121 and the piston component 122 to move in the axial direction of the retaining rod body 120. In this embodiment, preferably, a fourth convex ring 1211 is provided at the end 1210 of the inner sleeve 121, so that when sufficient external force is applied, the fourth convex ring 1211 is elastically deformable to release its engagement with the second convex ring, i.e., to a contact engagement state. After the engagement between the fourth convex ring 1211 and the second convex ring is released, the piston portion 1220 is pushed upward by the action of air pressure and moves, thereby elastically restoring the piston component 122 and the inner sleeve 121 along the retaining rod body 120 to the internal member 11, i.e., as shown in Figure 9D. At the same time, in the transition process from Figure 9C to Figure 9D, due to the presence of distance H, the retaining rod body 120 continues to move toward the housing bottom wall 101 until one end that has entered the main housing comes into contact with the housing bottom wall 101. In this state, the sixth engaging portion 1204 moves to a position where it engages with the seventh engaging portion 52, and the engagement between the sixth engaging portion 1204 and the seventh engaging portion 52 restricts the movement of the retaining rod body 120 inside the main housing 10. At this time, in the state shown in Figure 9D, the retaining rod body 120 cannot move downward or upward inside the main housing 10. In other words, the retaining rod body 120 is locked in position when the sixth engaging portion 1204 and the seventh engaging portion 52 are engaged. In the state shown in Figure 9D, the engagement between the sixth engaging portion 1204 and the seventh engaging portion 52 can be released by pulling the retaining rod body 120 upward with an external force, and the retaining rod body 120 can be returned to the state shown in Figure 9A.The above design allows the volume of the pump assembly to be compressed when stored, so that when the pump assembly is applied to a container, most of it can be stored inside the container, improving the portability of the pump assembly and the container containing it. At the same time, when the piston part 122 moves to a relative lower position, the piston part 1220 is exposed to a large gas pressure. If the pump assembly is stored in this state, the piston part 1220 itself will suffer significant wear over time. However, by compressing the retaining rod body 120 inside the main housing 10, a distance H is secured in advance, allowing the retaining rod body 120 to disengage from the piston part 122 and inner sleeve 121 first. After the piston part 122 and inner sleeve 121 elastically recover, the retaining rod body 120, which protrudes far outside the container body, can be stored. This ensures the storage capacity of the pump assembly itself while preventing wear on the piston part 1220 and extending the service life of the pump assembly.

[0061] Alternatively, as shown in Figures 9A to 9D, the pump assembly further includes a cover 5 provided on the outer circumference of one end of the main housing 10, with a central hole 50 provided in the center of the cover 5, and in the assembled state, the central hole 50 and the through hole 114 are aligned. Within this, the fourth engaging portion 51 is the upper surface of the cover 5, while the fifth engaging portion 1203 is a convex ring or convex portion provided on the outer circumference of the retaining rod body 120, and this protruding portion abuts against the upper surface of the cover 5, thereby restricting the retaining rod body 120 from going further into the interior of the main housing 10. The seventh engaging portion 52 is provided on the inner circumference of the central hole 50. Specifically, in the embodiment shown in the figure, the seventh engaging portion 52 is an annular groove provided on the inner circumference of the central hole 50, and the sixth engaging portion 1204 is a convex ring or protrusion provided on the outer circumference of the retaining rod body 120. By controlling the engagement between this convex ring or protrusion and the annular groove, the retaining rod body 120 is locked to the lid 5. Of course, in some other preferred embodiments, the seventh engaging portion 52 may be a protrusion, and the corresponding sixth engaging portion 1204 may be an annular groove. In another embodiment, without providing the lid 5, an annular member may be provided protruding from the outside of the top wall 110 of the internal member 11, and the fourth engaging portion and the seventh engaging portion may be provided within the annular member.

[0062] Where the “Examples” are used herein, it means that certain features, structures, or properties described in relation to the Examples may be included in at least one Example of the Application. The “Examples” as they appear in the Specification do not necessarily refer to the same Example, nor are they mutually exclusive, independent, or alternative Examples. Those skilled in the art will understand, both explicitly and implicitly, that the Examples described herein can be combined with other Examples.

[0063] Second Example In this second embodiment, there are modifications or changes compared to the first embodiment, but only the modified or changed parts will be described below.

[0064] Figures 10A and 10B show schematic diagrams of the second embodiment. In this second embodiment, a fourth engaging portion is also provided on the outside of the top wall 110' of the internal member 11', and this fourth engaging portion can be interpreted as the upper surface of the lid in the first embodiment. The fourth engaging portion is provided corresponding to the through hole 114', and a fifth engaging portion 1203' is also provided on the outer circumference of the body of the retaining rod body 120'.

[0065] In the second embodiment, when an external force is applied to the end of the retaining rod assembly, the retaining rod assembly can be moved toward the housing bottom wall 101' until one end of the retaining rod body 120' that has entered the main housing comes into contact with the housing bottom wall 110', as shown in Figure 10B. In this state, the fifth engaging portion 1203' moves to a position where it engages with the fourth engaging portion, i.e., until it comes into contact with the upper surface of the cover in the first embodiment, and the engagement between the fourth engaging portion and the fifth engaging portion 1203' restricts further movement of the retaining rod assembly into the main housing 10'.

[0066] In other words, in this second embodiment, compared to the first embodiment, when the fourth engaging portion abuts against the fifth engaging portion 1203', the retaining rod body 120' also abuts against the housing bottom wall 101', and the gap H that existed in the first embodiment does not exist.

[0067] Third Example In this third embodiment, there are modifications or changes compared to the first embodiment, but only the modified or changed parts will be described below.

[0068] Figures 11A and 11B show schematic diagrams of a third embodiment, in which the main housing comprises an inner cylinder housing 1001 and an outer cylinder housing 1002 projecting upward from the housing bottom wall 101'' instead of having a first or second housing, the outer cylinder housing 1002 being located on the outer circumference of the inner cylinder housing 1001 and defining an annular space 1003 between them. Within this space, the internal member 11'' is provided to move from a high position to a low position within the outer cylinder housing 1002, that is, when an external force is applied to the end of the retaining rod assembly, the internal member 11'' moves toward the housing bottom wall 101'' together with the retaining rod assembly, and in the lower position, the outer cylinder wall of the internal member 11'' is located at least partially within the annular space 1003, and at the same time, during the movement, the first engaging portion 1201'' slidably seals with the outer wall of the inner cylinder housing 1001.

[0069] In this embodiment, the internal component 11'' moves toward the housing bottom wall 101'' together with the retaining rod assembly, which also facilitates the housing of the pump assembly.

[0070] On the other hand, according to some embodiments of the present application, a container having a function for discharging contents is also provided, which comprises a container body 2 and a pump assembly 1 attached to the container body 2 for discharging the contents CW of the container body 2, as shown in Figure 1.

[0071] In the description of the embodiments of this application, the term "and / or" merely describes the relationship between related objects, indicating that three types of relationships may exist. For example, "A and / or B" can represent three cases: when A exists alone, when A and B exist simultaneously, and when B exists alone. Furthermore, the symbol " / " in the text generally indicates that the preceding and succeeding related objects are in an "or" relationship.

[0072] In the description of the embodiments of this application, unless otherwise specifically defined and limited, technical terms such as "attachment," "connection," "bonding," and "fixing" should be understood in a broad sense. For example, a connection may be fixed, removable, or integrally formed. It may also be mechanical or electrical. It may be directly connected, indirectly connected via an intermediate medium, have internal communication between two elements, or be in an interactive relationship between two elements. To a person skilled in the art, the specific meaning of these terms in the embodiments of this application can be understood depending on the specific circumstances.

[0073] Finally, the following points should be made: The above embodiments are merely illustrative of the technical concepts of this application and do not limit them. Although this application has been described in detail with reference to the embodiments described above, those skilled in the art will understand that modifications can still be made to the technical concepts described in the embodiments above, or that some or all of their technical features can be replaced with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical concepts to deviate from the scope of the technical concepts related to the embodiments of this application, and they should all be included within the scope of the claims and specification of this application. In particular, the technical features described in each embodiment can be combined in any way, provided that there is no structural inconsistency. This application is not limited to the specific embodiments disclosed herein, but encompasses all technical concepts included in the claims.

Claims

1. A pump assembly suitable for attachment to the container body, A main housing having an opening at one end and a housing bottom wall at the other end, with a pump suction port provided in the center of the housing bottom wall, and the interior communicating with the container body via the pump suction port, An internal component that can be attached to one end of the main housing through the opening, comprising a top wall, an inner cylindrical wall, and an outer cylindrical wall, wherein the inner cylindrical wall and the outer cylindrical wall each extend downward from the top wall, an annular cavity is formed between the outer cylindrical wall and the inner cylindrical wall, and the inner cylindrical wall surrounds the through hole, A retaining bar assembly, The aforementioned retaining rod assembly is A retaining rod body that can enter the interior of the main housing through the through hole, wherein one end of the retaining rod body that enters the interior of the main housing is provided with a first engaging portion that protrudes outward from the retaining rod body, and a second engaging portion is provided on the outer circumference of the body of the retaining rod body, and the first engaging portion and the second engaging portion are spaced apart along the axial direction of the retaining rod body, An inner sleeve that can be fitted onto the outer circumference of the retaining rod body, wherein the second engaging portion can engage with the end of the inner sleeve so as to restrict the inner sleeve from moving along the axial direction of the retaining rod body, A piston component having a piston portion at one end and a third engaging portion at the other end, which can be externally fitted onto the outer circumference of the inner sleeve, is provided. The pump assembly wherein, in the assembled state, the piston portion is located in the annular cavity and slidably seals in contact with the outer wall surface of the inner cylinder wall and the inner wall surface of the outer cylinder wall, respectively, the third engaging portion and the inner sleeve are both located between the first engaging portion and the second engaging portion, the first engaging portion and the second engaging portion both restrict the inner sleeve and the piston component from moving in the axial direction of the retaining rod body, and the first engaging portion slidably seals in contact with at least a portion of the inside of the main housing.

2. The first engaging portion is a first convex ring provided at one end of the retaining rod body and protruding outward, the second engaging portion is a second convex ring provided on the body of the retaining rod body, and the third engaging portion is a third convex ring provided and protruding inward toward the piston component. The pump assembly according to claim 1, wherein the inner sleeve and the third convex ring are fitted together between the first convex ring and the second convex ring in an interlocking fit when assembled.

3. The pump assembly according to claim 2, wherein the end of the inner sleeve has a fourth convex ring that protrudes toward the inside of the inner sleeve, and the fourth convex ring engages with the second convex ring to restrict the inner sleeve from moving in the axial direction of the retaining rod body.

4. The pump assembly according to claim 1, wherein the internal component is attached to one end of the main housing, and at least a portion of the main housing restricts the internal component from moving toward the interior of the main housing.

5. The main housing comprises a first housing and a second housing, and the first housing has a larger inner diameter than the second housing such that a shoulder portion is formed between the first housing and the second housing, located inside the main housing. The pump assembly according to claim 4, wherein the shoulder portion can abut against the other end of the internal member facing the top wall so as to restrict the internal member from moving toward the interior of the main housing, and the first engaging portion slidably seals with the inner wall of the second housing.

6. A fourth engaging portion is further provided on the outer side of the top wall of the internal component, and the fourth engaging portion is provided corresponding to the through hole, and a fifth engaging portion is further provided on the outer circumference of the body of the retaining rod body, The pump assembly according to claim 5, wherein an external force is applied to the end of the retaining rod assembly so that the retaining rod assembly moves toward the bottom wall of the housing until one end of the retaining rod body that has entered the interior of the main housing contacts the bottom wall of the housing, and in this state, the fifth engaging portion moves to a position where it engages with the fourth engaging portion, and the engagement between the fourth engaging portion and the fifth engaging portion restricts further movement of the retaining rod assembly into the interior of the main housing.

7. A fourth engaging portion is further provided on the outer side of the top wall of the internal component, and the fourth engaging portion is provided corresponding to the through hole, and a fifth engaging portion is further provided on the outer circumference of the body of the retaining rod body, The pump assembly according to claim 5, wherein an external force is applied to the end of the retaining rod assembly so that the retaining rod assembly moves toward the bottom wall of the housing to a position where the fifth engaging portion engages with the fourth engaging portion, and the engagement of the fourth engaging portion and the fifth engaging portion restricts further movement of the retaining rod assembly into the main housing, and in this state, one end of the retaining rod body that has entered the main housing is at a distance from the bottom wall of the housing, and at the same time the piston portion is in contact with the shoulder portion.

8. The pump assembly according to claim 7, wherein the piston component has a reinforcing portion, the reinforcing portion is provided corresponding to the outer circumference of the piston portion, and the reinforcing portion abuts against the shoulder portion when the fourth engaging portion and the fifth engaging portion are engaged.

9. A sixth engagement portion is further provided on the outer circumference of the body of the retaining rod, and a seventh engagement portion is further provided on the outer side of the top wall of the internal member, corresponding to the through hole. In this configuration, while the fourth engaging portion and the fifth engaging portion are engaged, an external force is continuously applied to the end of the retaining rod assembly to release the engagement between the fourth engaging portion and the fifth engaging portion, and the contact action between the piston portion and the shoulder portion releases the engagement between the second engaging portion and the end of the inner sleeve, allowing the inner sleeve and the piston component to move in the axial direction of the retaining rod body. The pump assembly according to claim 7, wherein the aforementioned distance allows the retaining rod body to continue moving toward the bottom wall of the housing until one end of the retaining rod body that has entered the main housing comes into contact with the bottom wall of the housing, and in this state, the sixth engaging portion moves to a position to engage with the seventh engaging portion, and the engagement of the seventh engaging portion and the sixth engaging portion restricts the movement of the retaining rod body within the main housing.

10. The pump assembly according to claim 9, further comprising a cover provided on the outer circumference of one end of the main housing, wherein a central hole is provided in the center of the cover, and in the assembled state, the central hole and the through hole are aligned with each other, and the fourth engaging portion is the upper surface of the cover, and the seventh engaging portion is provided on the inner circumference of the central hole.

11. The main housing further comprises an inner cylinder housing and an outer cylinder housing, each projecting upward from the bottom wall of the housing, wherein the outer cylinder housing is located on the outer circumference of the inner cylinder housing and defines an annular space between it and the inner cylinder housing. The pump assembly according to claim 1, wherein the internal component is provided so as to be movable within the outer cylinder housing from a low position to a high position, and at the low position, the outer cylinder wall of the internal component is at least partially located within the annular space, and at the same time, during movement, the first engaging portion is in slidable sealing contact with the outer wall of the inner cylinder housing.

12. The pump assembly according to claim 1, wherein a check valve body is provided at the pump suction port.

13. A container having a function for discharging contents and comprising a container body, wherein the container further comprises a pump assembly according to any one of claims 1 to 12, the pump assembly being attached to the container body and discharging the contents from the container body.

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