Container and pump assembly thereof

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 includes a pressing rod body (120), an inner sleeve member (121), and a piston member (122), and in an assembled state, the movement of the inner sleeve member and the piston member in an axial direction of the pressing rod body is limited, and at the same time, a first mating portion (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 this configuration is easy to manufacture while being ensured to be easily recycled.

Description

Technical Field

[0001] The present invention relates to the field of pressable pumps, and in particular to a container and a pump assembly thereof.Background Art

[0002] A container having a function of discharging contents which may be a hand sanitizer, medicine, a cosmetic liquid, shampoo, etc. is often used in daily life. The contents in the container can be discharged by pressing a pressing rod.

[0003] For example, in the Chinese Patent Publication No. CN 110155489 A, a pump assembly and a container having a function of discharging contents are described. In this pump assembly, a first cavity is defined in the interior of an outer pump housing, and a piston portion that is in slidable sealing contact with both inner and outer side wall surfaces 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 driven to stretch the first air cavity and compress the second air cavity, so that the contents in a container body is discharged via 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 enable a rod body to return such that the rod body is adapted to be pressed again, no spring is required in the pump assembly to enable the rod body to return, so that the entire pump assembly can be made of plastic without mixing any metal material, which in turn makes the pump assembly easy to recycle.

[0004] However, the inventors have found that for the pump assembly described in the Chinese Patent Publication No. CN 110155489 A, the pump assembly needs to meet the requirement of both the piston portion and a piston body being in slidable sealing contact with the inner 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 urgently needs to be solved.Summary

[0005] An objective of the present invention is to provide a pump assembly that is easy to manufacture while being ensured to be easily recycled.

[0006] The pump assembly for achieving the above purpose is adapted to be mounted on a container body, and includes a main housing, a built-in member, and a pressing rod assembly. The main housing has an opening at one end and a housing bottom wall at the other end, a pump suction port is provided at the center of the housing bottom wall, and the interior of the main housing is in communication with the container body through the pump suction port. The built-in member can be mounted at the one end of the main housing from the opening and includes a top wall, an inner cylinder wall and an outer cylinder wall, the inner cylinder wall and the outer cylinder wall both extending downward from the top wall, an annular chamber being formed between the outer cylinder wall and the inner cylinder wall, and the inner cylinder wall enclosing a through hole. The pressing rod assembly includes a pressing rod body, an inner sleeve member, and a piston member. The pressing rod body can extend from the through hole to the interior of the main housing, a first mating portion protruding toward the outside of the pressing rod body is provided at an end of the pressing rod body extending to the interior of the main housing, a second mating portion is provided on an outer periphery of a main body of the pressing rod body, and the first mating portion and the second mating portion are spaced apart by a distance in an axial direction of the pressing rod body. The inner sleeve member can be mounted on an outer periphery of the pressing rod body in a sleeving manner, and the second mating portion is engageable with an end portion of the inner sleeve member to limit the movement of the inner sleeve member in the axial direction of the pressing rod body; and the piston member has a piston portion at one end and a third mating portion at the other end, and can be mounted on an outer periphery of the inner sleeve member in a sleeving manner. In an assembled state, the piston portion is located in the annular chamber and is in slidable sealing contact with both an outer wall surface of the inner cylinder wall and an inner wall surface of the outer cylinder wall, the third mating portion and the inner sleeve member are both located between the first mating portion and the second mating portion, the first mating portion and the second mating portion jointly limit the movement of the inner sleeve member and the piston member in the axial direction of the pressing rod body, and the first mating portion is in slidable sealing contact with at least part of the interior of the main housing.

[0007] In one or more embodiments, the first mating portion is an outwardly protruding first protruding ring arranged at one end of the pressing rod body, the second mating portion is a second protruding ring arranged on the main body of the pressing rod body, and the third mating portion is a third protruding ring protruding toward the inside of the piston member.

[0008] In the assembled state, the inner sleeve member and the third protruding ring are fitted between the first protruding ring and the second protruding ring in an interference fit manner.

[0009] In one or more embodiments, a fourth protruding ring protruding toward the inside of the inner sleeve member is provided at the end portion of the inner sleeve member, and the fourth protruding ring engages with the second protruding ring to limit the movement of the inner sleeve member in the axial direction of the pressing rod body.

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

[0011] In one or more embodiments, the main housing includes a first housing and a second housing, an inner diameter of the first housing being larger than that of the second housing, so that a shoulder located in the interior of the main housing is formed between the first housing and the second housing.

[0012] The shoulder is capable of abutting against the other end of the built-in member opposite the top wall to limit the movement of the built-in member toward the interior of the main housing, and the first mating portion is in slidable sealing contact with an inner wall of the second housing.

[0013] In one or more embodiments, a fourth mating portion is further provided on an outer side of the top wall of the built-in member and is arranged corresponding to the through hole, and a fifth mating portion is further provided on the outer periphery of the main body of the pressing rod body.

[0014] An external force is applied to an end portion of the pressing rod assembly to enable the pressing rod assembly to move toward the housing bottom wall until the end of the pressing rod body extending to the interior of the main housing abuts against the housing bottom wall, and in this state, the fifth mating portion moves to a position in which the fifth mating portion engages with the fourth mating portion, and the engagement of the fourth mating portion with the fifth mating portion limits further movement of the pressing rod assembly toward the interior of the main housing.

[0015] In one or more embodiments, a fourth mating portion is further provided on an outer side of the top wall of the built-in member and is arranged corresponding to the through hole, and a fifth mating portion is further provided on the outer periphery of the main body of the pressing rod body.

[0016] An external force is applied to the end portion of the pressing rod assembly to enable the pressing rod assembly to move toward the housing bottom wall until the fifth mating portion moves to a position in which the fifth mating portion engages with the fourth mating portion, the engagement of the fourth mating portion with the fifth mating portion limits further movement of the pressing rod assembly toward the interior of the main housing, and in this state, the end of the pressing rod body extending to the interior of the main housing is spaced apart from the housing bottom wall by a distance, with the piston portion abutting against the shoulder.

[0017] In one or more embodiments, the piston member is provided with a reinforcement portion correspondingly arranged on an outer periphery of the piston portion, and in the state in which the fourth mating portion engages with the fifth mating portion, the reinforcement portion abuts against the shoulder.

[0018] In one or more embodiments, a sixth mating portion is further provided on the outer periphery of the main body of the pressing rod body, and a seventh mating portion arranged corresponding to the through hole is provided on the outer side of the top wall of the built-in member.

[0019] In the state in which the fourth mating portion engages with the fifth mating portion, a further external force is applied to the end portion of the pressing rod assembly, which enables the fourth mating portion to be disengaged from the fifth mating portion, and under the action of the piston portion abutting against the shoulder, enables the second mating portion to be disengaged from the end portion of the inner sleeve member and allows the inner sleeve member and the piston member to move in the axial direction of the pressing rod body.

[0020] The spacing by a distance allows the pressing rod body to further move toward the housing bottom wall until the end of the pressing rod body extending to the interior of the main housing abuts against the housing bottom wall, and in this state, the sixth mating portion moves to a position in which the sixth mating portion engages with the seventh mating portion, and the engagement of the seventh mating portion with the sixth mating portion limits the movement of the pressing rod body in the interior of the main housing.

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

[0022] In one or more embodiments, the main housing further includes an inner cylinder housing and an outer cylinder housing both protruding upward from the housing bottom wall, the outer cylinder housing being located at a periphery of the inner cylinder housing, so that an annular space is defined between the outer cylinder housing and the inner cylinder housing.

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

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

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

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

[0027] In a container having the pump assembly, the pressing rod assembly returns upward as a whole, without the need for a spring, to discharge contents from the container body. In addition, the pressing rod body, the inner sleeve member and the piston member are assembled into an integral piece by means of the first mating portion 1 and the second mating portion, so that during a manufacturing process, it is only necessary to ensure that the piston member is in slidable sealing contact with the wall surface of the annular chamber and that the end portion of the pressing rod body is in slidable sealing contact with the interior of the main housing. Such an assembly method reduces the machining difficulty of the pressing 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 more clearly understand the technical means of the present application to implement the same according to the content of the description, and to make the above and other objectives, features, and advantages of the present application more obvious and understandable, specific implementations of the present application are exemplarily described below.Brief Description of the Drawings

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of preferred implementations. The accompanying drawings are provided merely to illustrate the preferred implementations, rather than to limit the present application. Moreover, like components are denoted by like reference signs throughout the accompanying drawings. In the drawings: FIG. 1 is a schematic diagram of a container according to some embodiments of the present application; FIG. 2 is a schematic front view of a pump assembly according to a first embodiment of the present application; FIG. 3 is a schematic exploded view of the pump assembly according to the first embodiment of the present application; FIG. 4 is a schematic semi-sectional view of a main housing according to the first embodiment of the present application; FIG. 5A is a schematic perspective view of a built-in member according to the first embodiment of the present application; FIG. 5B is a schematic semi-sectional view of the built-in member according to the first embodiment of the present application; FIG. 6A is a schematic perspective view of a pressing rod body according to the first embodiment of the present application; FIG. 6B is a schematic semi-sectional view of the pressing rod body according to the first embodiment of the present application; FIG. 7A is a schematic perspective view of an inner sleeve member according to the first embodiment of the present application; FIG. 7B is a schematic semi-sectional view of the inner sleeve member according to the first embodiment of the present application; FIG. 8A is a schematic perspective view of a piston member according to the first embodiment of the present application; FIG. 8B is a schematic semi-sectional view of the piston member according to the first embodiment of the present application; FIGS. 9A to 9D respectively show schematic diagrams of the pump assembly according to the first embodiment of the present application moving to different states; FIGS. 10A and 10B respectively show schematic diagrams of a pump assembly according to a second embodiment of the present application moving to different states; and FIGS. 11A and 11B respectively show schematic diagrams of a pump assembly according to a third embodiment of the present application moving to different states. Detailed Description of Embodiments

[0030] The present invention will be further described below with reference to specific implementations and the drawings, and more details are explained in the following description for the ease of fully understanding the present invention; however, the present invention can obviously be implemented in various different manners than 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 the specific implementations.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs. The terms used herein are merely intended to describe the specific embodiments, but are not intended to limit the present application. The terms "comprise" and "have" and any variations thereof in the description and the claims of the present application as well as the brief description of the drawings described above are intended to cover non-exclusive inclusion.

[0032] FIG. 1 shows an exemplary configuration of a container 1000 having a function of discharging contents. The container 1000 includes a pump assembly 1 and a container body 2. The pump assembly 1 is mounted on the container body 2 and is configured to discharge contents CW from the container body 2.

[0033] In order 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.First embodiment:

[0034] 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.

[0035] It should be understood that the drawings are merely used as examples, and are not necessarily drawn to scale, and should not be taken as a limitation to the actually claimed scope of protection of the present invention.

[0036] Referring to FIGS. 2 and 3, the pump assembly 1 includes a main housing 10, a built-in member 11, and a pressing rod assembly 12. The pressing rod assembly 12 includes a pressing rod body 120, an inner sleeve member 121, and a piston member 122. The structures and assembly relationship of the above components are further described in detail below with reference to the figures.

[0037] 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 has a housing bottom wall 101 at the other end. A pump suction port 102 is provided at the center of the housing bottom wall 101. As shown in FIG. 1, it can be understood that the interior of the main housing 10 is in communication with the container body 2 through the pump suction port 102, so that the contents CW in the container body 2 can enter the main housing 10 through the pump suction port 102. It can be understood that, in the structure as shown, the housing bottom wall 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 contents CW into the main housing 10. In some other suitable embodiments, the housing bottom wall 101 may also be arranged at the end portion of the main housing 10, and the suction tube 3 is connected to the housing bottom wall 101 by means of other connection structures such as a snap-fit fastener.

[0038] It can be understood that in the implementation as shown, the main part of the pump assembly 1 may be substantially a rotating body that rotates around its central axis. Therefore, for convenience, reference may 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 the pump assembly 1), a radial direction (i.e., a direction radiating outward from the central axis of the pump assembly 1 in FIG. 2) and a circumferential direction (i.e., a direction of rotation around the central axis) of the pump assembly 10 in FIG. 2. It should be understood that this description does not limit a specific component of the pump assembly 1 to be circular in cross section. For example, the main housing 10 and / or the built-in member 11 are not necessarily cylinders that are circular in cross section, but may also be tubular members that are square, rectangular, etc. in cross section.

[0039] FIG. 5A shows a schematic perspective view of the built-in member 11, and FIG. 5B shows a schematic semi-sectional view of the built-in member 11. Referring to FIGS. 1, 4 and 5B, it can be understood that the built-in member 11 can be mounted at one end of the main housing 10 from the opening 100. The built-in member 11 includes a top 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 extend downward from the top 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 hole portion running through the top wall 110.

[0040] It will be appreciated that spatial relationship terms such as "upper", "lower", "vertical", "high" and "low" are used herein to describe the relationship between one element or feature and other elements or features shown in the drawings, and refer to 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 besides the orientations described in the drawings. For example, if the assemblies in the drawings are flipped, the orientation of the element described as being "above" another element or feature will be changed to being "below" the another element or feature. Therefore, the spatial relationship descriptors used herein should be interpreted correspondingly.

[0041] FIG. 6A shows a schematic perspective view of the pressing rod body 120, and FIG. 6B shows a schematic semi-sectional view of the pressing rod body 120. A discharge channel 1200 is defined in the pressing rod body 120, and the discharge channel 1200 is configured to direct the discharge of the contents CW. Referring to FIGS. 1, 5B and 6B, it can be understood that the pressing rod body 120 can extend to the interior of the main housing 10 from the through hole 114. A first mating portion 1201 protruding toward the outside of the pressing rod body 120 is provided at an end of the pressing rod body 120 extending to the interior of the main housing 10, and a second mating portion 1202 is provided on an outer periphery of the main body of the pressing rod body 120. The first mating portion 1201 and the second mating portion 1202 are spaced apart by a distance in an axial direction of the pressing rod body 120. The axial direction of the pressing rod body 120 can be understood as the extension direction of the axis of the pressing rod body 120.

[0042] FIG. 7A shows a schematic perspective view of the inner sleeve member 121, and FIG. 7B shows a schematic semi-sectional view of the inner sleeve member 121. Referring to FIGS. 1, 6B and 7B, it can be understood that the inner sleeve member 121 can be mounted on an outer periphery of the pressing rod body 120 in a sleeving manner, and the second mating portion 1201 can engage 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 pressing rod body 120.

[0043] FIG. 8A shows a schematic perspective view of the piston member 122, and FIG. 8B shows a schematic semi-sectional view of the piston member 122. Referring to FIGS. 1, 6B, 7B and 8B, it can be understood that the piston member 122 can be mounted on an outer periphery of the inner sleeve member 121 in a sleeving manner. The piston member 122 has a piston portion 1220 at one end and a third mating portion 1221 at the other end.

[0044] FIGS. 9A to 9D respectively show 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 slidable sealing contact with both an outer wall surface of the inner cylinder wall 111 and an inner wall surface of the outer cylinder wall 112; and in the assembled state, the third mating portion 1221 of the piston member 122 and the inner sleeve member 121 are both located between the first mating portion 1201 and the second mating portion 1202, and the first mating portion 1201 and the second mating portion 1202 jointly limit the movement of the inner sleeve member 121 and the piston member 122 in the axial direction of the pressing rod body 120, that is, the pressing rod body 120, the inner sleeve member 121 and the piston member 122 are assembled into an integral piece by means of the first mating portion 1201 and the second mating portion 1202. In addition, the first mating portion 1201 is in slidable sealing contact with at least part of the interior of the main housing 10.

[0045] It can be understood that the phrase "slidable sealing contact" means that two elements are slidable relative to each other while maintaining sealing between sliding-fit interfaces, which, for example, can be achieved by means of the self-deformability of a material, such as plastic, or by providing sufficient areas of the sliding-fit interfaces. For example, the outer diameter of the inner cylinder wall 111 may 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), so that an interference fit may be formed between them, achieving better sealing performance. It can also be understood that, taking "the outer diameter of the inner cylinder wall 111" as an example, the outer diameter refers to the diameter of a wall surface of the inner cylinder wall 111 located on an outer radial side.

[0046] In this state, when pressure is applied to the end portion of the pressing rod body 120, the integral piece formed by the pressing rod body 120, the inner sleeve member 121 and the piston member 122 can be driven to move in the interior of 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.

[0047] Further, as shown in FIG. 1, a check valve element 4 is provided at the pump suction port 102 of the pump assembly 1. When pressure is applied to the end portion of the pressing rod body 120 to move it to the state as shown in FIG. 9C, the pump assembly 1 and the entire container 1000 have small vertical dimensions and are compact in structure. It is worth mentioning that the pump suction port 102 is always closed by the check valve element 4 (substantially in an inverted cone shape as shown) during this process, such that the contents CW in the container body 20 would not flow out.

[0048] When needed, the pressing rod body 120 may be lifted and moved from FIG. 9C to FIG. 9B to FIG. 9A. During this process, the check valve element 4 gradually opens the pump suction port 102, and part of the contents CW are directed from the container body 2 to the main housing 10 under the action of air pressure, and accumulate between the first mating portion 1201 at the lower part of the pressing rod body 120 and the housing bottom wall 101.

[0049] In the state shown in FIG. 9A, when the pressing rod body 120 is pressed to move from the state shown in FIG. 9A toward 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 pressing rod body 120 moves downward with the piston portion 1220, the pressure difference between the lower chamber 113A and the upper chamber 113B gradually increases, thereby providing an elastic restoring force for the piston portion 1220 to return upward. An elastic restoring force for upward return is applied to both the pressing rod body 120 and the inner sleeve member 121 by the piston portion 1220 by means of the first mating portion 1201 and the second mating portion 1202, that is, providing an elastic restoring force to enable the pressing rod assembly 12 to return upward as a whole. It is worth mentioning that, during the process from FIG. 9A to FIG. 9B to FIG. 9C, the check valve element 4 gradually closes the pump suction port 102. After repeatedly lifting and pressing the pressing rod body 120, enough contents CW accumulate between the first mating portion 1201 at the lower part of the pressing rod body 120 and the housing bottom wall 101 and are then discharged via the discharge channel 1200. Reference may be made to Chinese invention patent CN 109649819 A for the specific process of discharge of the contents by pressing, which will not be repeated here.

[0050] Therefore, in a container 1000 having the pump assembly 1 described above, the pressing rod assembly 12 returns upward as a whole, without the need for a spring, to discharge the contents CW from the container body 2.

[0051] In addition, the pressing rod body 120, the inner sleeve member 121 and the piston member 122 are assembled into an integral piece by means of the first mating portion 1201 and the second mating portion 1202, so that during a manufacturing process, it is only necessary to ensure that the piston member 122 is in slidable sealing contact with the wall of the annular chamber 113 and that the end portion of the pressing rod body 120 is in slidable sealing contact with the interior of the main housing 10. Such an assembly method reduces the machining difficulty of the pressing rod assembly 12, making the pump assembly 1 as a whole easy to manufacture.

[0052] In the description of the embodiments of the present application, the 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 indicated technical features. In the description of the embodiments of the present application, the phrase "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0053] It can be understood that two orientations "perpendicular", "consistent", "parallel" and the like mentioned herein do not need to meet the strict requirements for angles in the mathematical sense, but allow a certain tolerance range, for example, it differs from the angle required in the mathematical sense by 20° or less. In addition, the expression of "along a direction" or "in a direction" means that there is at least a component in this 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 this direction. It can be further understood that unless otherwise stated, all ranges mentioned herein include the mentioned endpoint values.

[0054] Optionally, in some specific implementations of the first embodiment, as shown in FIG. 6A, the first mating portion 1201 and the second mating portion 1202 are each of a protruding ring structure protruding from the pressing rod body 120. The protruding ring structure can be understood as a ring-shaped structure protruding outward from the outer contour of the pressing rod body 120. Specifically, the first mating portion 1201 may be an outwardly protruding first protruding ring arranged at one end of the pressing rod body 120, and the second mating portion 1202 may be a second protruding ring protruding from the main body of the pressing rod body 120. In addition, as shown in FIG. 8B, the third mating portion 1221 is also a protruding ring, that is, a third protruding ring, protruding from an inner side surface of the piston member 122 toward the inside of the piston member 122. In the assembled state as shown in FIG. 1, 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 manner, that is, the inner sleeve member 121 and the third protruding ring are clamped between the first protruding ring and the second protruding ring in an interference fit manner, so that the pressing rod body 120, the inner sleeve member 121 and the piston member 122 are assembled into an integral piece. In some other optional embodiments, the first mating portion 1201 and / or the second mating portion 1202 and / or the third mating portion 1221 may be of other configurations different from the protruding ring structure, such as a snap-fit structure or a hook structure, which can limit the relative movement of the pressing rod body 120, the inner sleeve member 121 and the piston member 122.

[0055] Further, on the basis of the embodiment described above, optionally, a fourth protruding ring 1211 protruding toward the inside of the inner sleeve member 121 is provided at 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 in the axial direction of the pressing rod body. With the arrangement of the fourth protruding ring 1211 engaging with the second protruding ring, rather than the end portion of the inner sleeve member 121 being directly configured 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, that is, in a contact fit state, so as to facilitate the disassembly of the pressing rod assembly 12.

[0056] Still referring to FIGS. 9A and 9B, in the first embodiment, the built-in member 11 is mounted at one end of the main housing 10, and the movement of the built-in member 11 toward the interior of the main housing 10 is limited by at least part of the main housing 10, that is, the built-in member 11 mounted at 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 an embodiment, as shown in FIG. 4, the main housing 10 includes a first housing 10A and a second housing 10B, the inner diameter of the first housing 10A is larger than the inner diameter of the second housing 10B, so that a shoulder 104 located in the interior of 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 shoulder 104 can abut against the other end 115 of the built-in member 11 opposite the top wall 110 to limit the movement of the built-in member 11 toward the interior of the main housing. That is, it can be understood that, in the placement state as shown, the built-in member 11 is supported on an upper surface of the shoulder 104. In addition, in this embodiment, the first mating portion 1201 is in slidable sealing contact with the inner wall of the second housing 10B. Optionally, in some other embodiments different from the embodiment as shown, the built-in member 11 may be fixedly connected to one end of the main housing 10 by means of, for example, snap-fit connection, which can also limit the movement of the built-in member 11 toward the interior of the main housing 10. However, with the arrangement of the second housing 10B having a smaller inner diameter, the first mating portion 1201, that is, the first protrusion, is in slidable sealing contact with the inner wall of the main housing 10 without the need for protruding too much.

[0058] Further, still referring to FIGS. 9A to 9C, in the first embodiment, a fourth mating portion 51 is further provided on the outer side of the top wall 110 of the built-in member 11, the fourth mating portion 51 is arranged corresponding to the through hole 114 of the top wall 110, and a fifth mating portion 1203 is further provided on the outer periphery of the main body of the pressing rod body 120. An external force is applied to the end portion of the pressing rod assembly 12 to enable the pressing rod assembly 12 to move toward the housing bottom wall 101 until it moves to the state as shown in FIG. 9C, and in this state, the fifth mating portion 1203 moves to a position in which it engages with the fourth mating portion 51, and the engagement of the fourth mating portion 51 with the fifth mating portion 1203 limits the further extension of the pressing rod assembly 12 toward the interior of the main housing 10. In addition, in this state, the end of the pressing rod body 120 extending to the interior of the main housing is spaced apart from the housing bottom wall 101 by a distance H, with the piston portion 1220 abutting against the shoulder 104.

[0059] Further, referring to FIGS. 8B and 9C, the piston member 122 is further provided with a reinforcement portion 1222. The reinforcement portion 1222 is correspondingly arranged on the outer periphery of the piston portion 1220, and when the fourth mating portion 51 engages with the fifth mating portion 1203, the reinforcement portion 1222 abuts against the shoulder 104. The arrangement of the reinforcement 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 with the shoulder 104.

[0060] Further, referring to FIGS. 9A to 9D, a sixth mating portion 1204 is further provided on the outer periphery of the main body of the pressing rod body 120, and a seventh mating portion 52 arranged corresponding to the through hole 114 is further provided on the outer side of the top wall 110 of the built-in member 11. When the fourth mating portion 51 engages with the fifth mating portion 1203 as shown in FIG. 9C, a further external force is applied to the end portion of the pressing rod assembly 12 to enable the fourth mating portion 51 to be disengaged from the fifth mating portion 1203, and at the same time, since the piston portion 1220 abuts against the shoulder 104, under the interaction between them, an external force can be applied to the second mating portion 1202 to enable the second mating portion 1202 to be disengaged from the end portion of the inner sleeve member 121 and allow the inner sleeve member 121 and the piston member 122 to move in the axial direction of the pressing rod body 120. In this embodiment, in a preferred implementation, a fourth protruding ring 1211 is provided at the end portion 1210 of the inner sleeve member 121, so that when a sufficiently large external force is applied, the fourth protruding ring 1211 can elastically deform to enable the fourth protruding ring 1211 to be disengaged from the second protruding ring, that is, in a contact fit state. When the fourth protruding ring 1211 is disengaged from the second protruding ring, the piston portion 1220 is pushed upward under the action of air pressure, so as to drive the piston member 122 and the inner sleeve member 121 to return along the pressing rod body 120 to the built-in member 11, as shown in FIG. 9D. In addition, during the change from the state shown in FIG. 9C to the state shown in FIG. 9D, the spacing by the distance H allows further movement of the pressing rod body 120 toward the housing bottom wall 101 until the end of the pressing rod body 120 extending to the interior of the main housing abuts against the housing bottom wall 101. In this state, the sixth mating portion 1204 moves to a position in which it engages with the seventh mating portion 52, and the engagement of the seventh mating portion 1204 with the sixth mating portion 52 limits the movement of the pressing rod body 120 in the interior of the main housing 10. In addition, in the state shown in FIG. 9D, the pressing rod body 120 cannot move downward or upward in the main housing 10. That is, the pressing rod body 120 is locked in position when the seventh mating portion 1204 engages with the sixth mating portion 52. In the state shown in FIG. 9D, pulling the pressing rod body 120 upward under an external force enables the seventh mating portion 1204 to be disengaged from the sixth mating portion 52, so as to restore the pressing 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 storage state, so that when the pump assembly is used in a container, most of it can be stored in the container, thereby improving the portability of the pump assembly and the container having the pump assembly. In addition, since the piston portion 1220 withstands greater gas pressure when the piston member 122 moves to a relatively low position, if the pump assembly is stored in this state, the piston portion 1220 itself will be greatly worn over time. By design, when the pressing rod body 120 is compressed to the interior of the main housing 10, the distance H is reserved, so that the pressing rod body 120 can first be disengaged from the piston member 122 and the inner sleeve member 121 to enable the piston member 122 and the inner sleeve member 121 to return, and then the pressing rod body 120 that extends longer outside the container body is stored, which ensures the storability of the pump assembly itself, and can also prevent wear of the piston portion 1220, prolonging the service life of the pump assembly.

[0061] Optionally, as shown in FIGS. 9A to 9D, the pump assembly further includes a cap 5 arranged on the outer periphery of one end of the main housing 10, a center hole 50 is provided at the center of the cap 5, and in the assembled state, the center hole 50 is aligned with the through hole 114. The fourth mating portion 51 is an upper surface of the cap 5, and correspondingly, the fifth mating portion 1203 is a protruding ring or a protrusion arranged on the outer periphery of the pressing rod body 120, and the protruding portion abuts against the upper surface of the cap 5 to limit further extension of the pressing rod body 120 to the interior of the main housing 10. The seventh mating portion 52 is arranged on an inner periphery of the center hole 50. Specifically, in the embodiment as shown, the seventh mating portion 52 is an annular groove arranged on the inner periphery of the center hole 50, and the sixth mating portion 1204 is a protruding ring or a protrusion arranged on the outer periphery of the pressing rod body 120. The protruding ring or the protrusion is clamped with the annular groove to lock the pressing rod body 120 in the cap 5. Of course, in some other suitable embodiments, the seventh mating portion 52 may also be a protrusion, and the corresponding sixth mating portion 1204 may be an annular groove. In another embodiment, no cap 5 may be provided, and a ring-shaped member may be provided protruding from the outer side of the top wall 110 of the built-in member 11, and the fourth mating portion and the seventh mating portion are arranged in the ring-shaped member.

[0062] The phrase "embodiment" mentioned herein means that the specific features, structures, or characteristics described in conjunction with the embodiment can be encompassed in at least one embodiment of the present application. This phrase at various locations in the description does not necessarily refer to the same embodiment, or an independent or alternative embodiment exclusive of another embodiment. Those skilled in the art understand explicitly or implicitly that the embodiment described herein may be combined with another embodiment.Second embodiment

[0063] In the second embodiment, there are variants or changes compared to the first embodiment, and only the variants or changes are described below.

[0064] FIGS. 10A and 10B show schematic diagrams of the second embodiment. In the second embodiment, a fourth mating portion is also provided on an outer side of a top wall 110' of a built-in member 11', and the fourth mating portion can be understood as the upper surface of the cap in the first embodiment. The fourth mating portion is arranged corresponding to a through hole 114', and a fifth mating portion 1203' is provided on an outer periphery of a main body of a pressing rod body 120'.

[0065] In the second embodiment, when an external force is applied to an end portion of a pressing rod assembly, the pressing rod assembly can be moved toward a housing bottom wall 101' until an end of the pressing rod body 120' extending to the interior of the main housing abuts against the housing bottom wall 110', that is, as shown in FIG. 10B. In this state, the fifth mating portion 1203' moves to a position in which it engages with the fourth mating portion, that is, for example, where it abuts against the upper surface of the cap in the first embodiment, and the engagement of the fourth mating portion with the fifth mating portion 1203' limits further movement of the pressing rod assembly toward the interior of the main housing 10'.

[0066] That is, compared with the first embodiment, in the second embodiment, when the fourth mating portion abuts against the fifth mating portion 1203', the pressing rod body 120' and the housing bottom wall 101' also abut against each other, and are not spaced apart by the distance H as described in the first embodiment.Third embodiment

[0067] In the third embodiment, there are variants or changes compared to the first embodiment, and only the variants or changes are described below.

[0068] FIGS. 11A and 11B show schematic diagrams of the third embodiment. In the third embodiment, the main housing does not have a first housing or a second housing, but instead includes an inner cylinder housing 1001 and an outer cylinder housing 1002 both protruding upward from a housing bottom wall 101". The outer cylinder housing 1002 is located at a 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. A built-in member 11" is configured to be movable in the outer cylinder housing 1002 from a higher position to a lower position in which the outer cylinder wall of the built-in member 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 pressing rod assembly, the built-in member 11" moves toward the housing bottom wall 101" together with the pressing rod assembly. In addition, during the movement, the first mating portion 1201" is in slidable sealing contact with an outer wall of the inner cylinder housing 1001.

[0069] In this embodiment, since the built-in member 11" moves toward the housing bottom wall 101" together with the pressing rod assembly, it is also possible to facilitate the storage of the pump assembly.

[0070] On the other hand, according to some embodiments of the present application, a container having a function of discharging contents is further provided. As shown in FIG. 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 is configured to discharge contents CW from the container body 2.

[0071] In the description of the embodiments of the present application, the term "and / or" is merely intended to describe the associated relationship of associated objects, indicating that three relationships can exist, for example, A and / or B can include: only A exists, both A and B exist, and only B exists. In addition, the character " / " herein generally indicates that the associated objects before and after the character are in a relationship of "or".

[0072] In the description of the embodiments of the present application, unless otherwise explicitly specified and defined, the technical terms such as "mount", "connected", "connect" and "fix" should be interpreted in a broad sense, for example, they may be a fixed connection, a detachable connection, or integration; may be a mechanical connection or an electric connection; and may be a direct connection or an indirect connection through an intermediate medium, and may be communication between interiors of two elements or interaction between two elements. For those of ordinary skill in the art, the specific meaning of the terms mentioned above in the embodiments of the present application should be construed according to specific circumstances.

[0073] Finally, it should be noted that the above embodiments are merely used for illustrating rather than limiting the technical solutions of the present application. Although the present application has been illustrated in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features thereof may be equivalently substituted; and such modifications or substitutions do not make the essence of the corresponding technical solution depart from the scope of the technical solutions of the embodiments of the present application, and should fall within the scope of the claims and the description of the present application. In particular, the technical features mentioned in the embodiments can be combined in any manner, provided that there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein but includes all the technical solutions that fall within the scope of the claims.

Examples

first embodiment

[0034]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.

[0035]It should be understood that the drawings are merely used as examples, and are not necessarily drawn to scale, and should not be taken as a limitation to the actually claimed scope of protection of the present invention.

[0036]Referring to FIGS. 2 and 3, the pump assembly 1 includes a main housing 10, a built-in member 11, and a pressing rod assembly 12. The pressing rod assembly 12 includes a pressing rod body 120, an inner sleeve member 121, and a piston member 122. The structures and assembly relationship of the above components are further described in detail below with reference to the figures.

[0037]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 has a housing bottom w...

second embodiment

[0063]In the second embodiment, there are variants or changes compared to the first embodiment, and only the variants or changes are described below.

[0064]FIGS. 10A and 10B show schematic diagrams of the second embodiment. In the second embodiment, a fourth mating portion is also provided on an outer side of a top wall 110' of a built-in member 11', and the fourth mating portion can be understood as the upper surface of the cap in the first embodiment. The fourth mating portion is arranged corresponding to a through hole 114', and a fifth mating portion 1203' is provided on an outer periphery of a main body of a pressing rod body 120'.

[0065]In the second embodiment, when an external force is applied to an end portion of a pressing rod assembly, the pressing rod assembly can be moved toward a housing bottom wall 101' until an end of the pressing rod body 120' extending to the interior of the main housing abuts against the housing bottom wall 110', that is, as shown in FIG. 10B. In th...

third embodiment

[0067]In the third embodiment, there are variants or changes compared to the first embodiment, and only the variants or changes are described below.

[0068]FIGS. 11A and 11B show schematic diagrams of the third embodiment. In the third embodiment, the main housing does not have a first housing or a second housing, but instead includes an inner cylinder housing 1001 and an outer cylinder housing 1002 both protruding upward from a housing bottom wall 101". The outer cylinder housing 1002 is located at a 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. A built-in member 11" is configured to be movable in the outer cylinder housing 1002 from a higher position to a lower position in which the outer cylinder wall of the built-in member 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 pressing rod assembly, the ...

Technical Field

[0001] The present invention relates to the field of pressable pumps, and in particular to a container and a pump assembly thereof.Background Art

[0002] A container having a function of discharging contents which may be a hand sanitizer, medicine, a cosmetic liquid, shampoo, etc. is often used in daily life. The contents in the container can be discharged by pressing a pressing rod.

[0003] For example, in the Chinese Patent Publication No. CN 110155489 A, a pump assembly and a container having a function of discharging contents are described. In this pump assembly, a first cavity is defined in the interior of an outer pump housing, and a piston portion that is in slidable sealing contact with both inner and outer side wall surfaces 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 driven to stretch the first air cavity and compress the second air cavity, so that the contents in a container body is discharged via 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 enable a rod body to return such that the rod body is adapted to be pressed again, no spring is required in the pump assembly to enable the rod body to return, so that the entire pump assembly can be made of plastic without mixing any metal material, which in turn makes the pump assembly easy to recycle.

[0004] However, the inventors have found that for the pump assembly described in the Chinese Patent Publication No. CN 110155489 A, the pump assembly needs to meet the requirement of both the piston portion and a piston body being in slidable sealing contact with the inner 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 urgently needs to be solved.Summary

[0005] An objective of the present invention is to provide a pump assembly that is easy to manufacture while being ensured to be easily recycled.

[0006] The pump assembly for achieving the above purpose is adapted to be mounted on a container body, and includes a main housing, a built-in member, and a pressing rod assembly. The main housing has an opening at one end and a housing bottom wall at the other end, a pump suction port is provided at the center of the housing bottom wall, and the interior of the main housing is in communication with the container body through the pump suction port. The built-in member can be mounted at the one end of the main housing from the opening and includes a top wall, an inner cylinder wall and an outer cylinder wall, the inner cylinder wall and the outer cylinder wall both extending downward from the top wall, an annular chamber being formed between the outer cylinder wall and the inner cylinder wall, and the inner cylinder wall enclosing a through hole. The pressing rod assembly includes a pressing rod body, an inner sleeve member, and a piston member. The pressing rod body can extend from the through hole to the interior of the main housing, a first mating portion protruding toward the outside of the pressing rod body is provided at an end of the pressing rod body extending to the interior of the main housing, a second mating portion is provided on an outer periphery of a main body of the pressing rod body, and the first mating portion and the second mating portion are spaced apart by a distance in an axial direction of the pressing rod body. The inner sleeve member can be mounted on an outer periphery of the pressing rod body in a sleeving manner, and the second mating portion is engageable with an end portion of the inner sleeve member to limit the movement of the inner sleeve member in the axial direction of the pressing rod body; and the piston member has a piston portion at one end and a third mating portion at the other end, and can be mounted on an outer periphery of the inner sleeve member in a sleeving manner. In an assembled state, the piston portion is located in the annular chamber and is in slidable sealing contact with both an outer wall surface of the inner cylinder wall and an inner wall surface of the outer cylinder wall, the third mating portion and the inner sleeve member are both located between the first mating portion and the second mating portion, the first mating portion and the second mating portion jointly limit the movement of the inner sleeve member and the piston member in the axial direction of the pressing rod body, and the first mating portion is in slidable sealing contact with at least part of the interior of the main housing.

[0007] In one or more embodiments, the first mating portion is an outwardly protruding first protruding ring arranged at one end of the pressing rod body, the second mating portion is a second protruding ring arranged on the main body of the pressing rod body, and the third mating portion is a third protruding ring protruding toward the inside of the piston member.

[0008] In the assembled state, the inner sleeve member and the third protruding ring are fitted between the first protruding ring and the second protruding ring in an interference fit manner.

[0009] In one or more embodiments, a fourth protruding ring protruding toward the inside of the inner sleeve member is provided at the end portion of the inner sleeve member, and the fourth protruding ring engages with the second protruding ring to limit the movement of the inner sleeve member in the axial direction of the pressing rod body.

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

[0011] In one or more embodiments, the main housing includes a first housing and a second housing, an inner diameter of the first housing being larger than that of the second housing, so that a shoulder located in the interior of the main housing is formed between the first housing and the second housing.

[0012] The shoulder is capable of abutting against the other end of the built-in member opposite the top wall to limit the movement of the built-in member toward the interior of the main housing, and the first mating portion is in slidable sealing contact with an inner wall of the second housing.

[0013] In one or more embodiments, a fourth mating portion is further provided on an outer side of the top wall of the built-in member and is arranged corresponding to the through hole, and a fifth mating portion is further provided on the outer periphery of the main body of the pressing rod body.

[0014] An external force is applied to an end portion of the pressing rod assembly to enable the pressing rod assembly to move toward the housing bottom wall until the end of the pressing rod body extending to the interior of the main housing abuts against the housing bottom wall, and in this state, the fifth mating portion moves to a position in which the fifth mating portion engages with the fourth mating portion, and the engagement of the fourth mating portion with the fifth mating portion limits further movement of the pressing rod assembly toward the interior of the main housing.

[0015] In one or more embodiments, a fourth mating portion is further provided on an outer side of the top wall of the built-in member and is arranged corresponding to the through hole, and a fifth mating portion is further provided on the outer periphery of the main body of the pressing rod body.

[0016] An external force is applied to the end portion of the pressing rod assembly to enable the pressing rod assembly to move toward the housing bottom wall until the fifth mating portion moves to a position in which the fifth mating portion engages with the fourth mating portion, the engagement of the fourth mating portion with the fifth mating portion limits further movement of the pressing rod assembly toward the interior of the main housing, and in this state, the end of the pressing rod body extending to the interior of the main housing is spaced apart from the housing bottom wall by a distance, with the piston portion abutting against the shoulder.

[0017] In one or more embodiments, the piston member is provided with a reinforcement portion correspondingly arranged on an outer periphery of the piston portion, and in the state in which the fourth mating portion engages with the fifth mating portion, the reinforcement portion abuts against the shoulder.

[0018] In one or more embodiments, a sixth mating portion is further provided on the outer periphery of the main body of the pressing rod body, and a seventh mating portion arranged corresponding to the through hole is provided on the outer side of the top wall of the built-in member.

[0019] In the state in which the fourth mating portion engages with the fifth mating portion, a further external force is applied to the end portion of the pressing rod assembly, which enables the fourth mating portion to be disengaged from the fifth mating portion, and under the action of the piston portion abutting against the shoulder, enables the second mating portion to be disengaged from the end portion of the inner sleeve member and allows the inner sleeve member and the piston member to move in the axial direction of the pressing rod body.

[0020] The spacing by a distance allows the pressing rod body to further move toward the housing bottom wall until the end of the pressing rod body extending to the interior of the main housing abuts against the housing bottom wall, and in this state, the sixth mating portion moves to a position in which the sixth mating portion engages with the seventh mating portion, and the engagement of the seventh mating portion with the sixth mating portion limits the movement of the pressing rod body in the interior of the main housing.

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

[0022] In one or more embodiments, the main housing further includes an inner cylinder housing and an outer cylinder housing both protruding upward from the housing bottom wall, the outer cylinder housing being located at a periphery of the inner cylinder housing, so that an annular space is defined between the outer cylinder housing and the inner cylinder housing.

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

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

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

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

[0027] In a container having the pump assembly, the pressing rod assembly returns upward as a whole, without the need for a spring, to discharge contents from the container body. In addition, the pressing rod body, the inner sleeve member and the piston member are assembled into an integral piece by means of the first mating portion 1 and the second mating portion, so that during a manufacturing process, it is only necessary to ensure that the piston member is in slidable sealing contact with the wall surface of the annular chamber and that the end portion of the pressing rod body is in slidable sealing contact with the interior of the main housing. Such an assembly method reduces the machining difficulty of the pressing 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 more clearly understand the technical means of the present application to implement the same according to the content of the description, and to make the above and other objectives, features, and advantages of the present application more obvious and understandable, specific implementations of the present application are exemplarily described below.Brief Description of the Drawings

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of preferred implementations. The accompanying drawings are provided merely to illustrate the preferred implementations, rather than to limit the present application. Moreover, like components are denoted by like reference signs throughout the accompanying drawings. In the drawings: FIG. 1 is a schematic diagram of a container according to some embodiments of the present application; FIG. 2 is a schematic front view of a pump assembly according to a first embodiment of the present application; FIG. 3 is a schematic exploded view of the pump assembly according to the first embodiment of the present application; FIG. 4 is a schematic semi-sectional view of a main housing according to the first embodiment of the present application; FIG. 5A is a schematic perspective view of a built-in member according to the first embodiment of the present application; FIG. 5B is a schematic semi-sectional view of the built-in member according to the first embodiment of the present application; FIG. 6A is a schematic perspective view of a pressing rod body according to the first embodiment of the present application; FIG. 6B is a schematic semi-sectional view of the pressing rod body according to the first embodiment of the present application; FIG. 7A is a schematic perspective view of an inner sleeve member according to the first embodiment of the present application; FIG. 7B is a schematic semi-sectional view of the inner sleeve member according to the first embodiment of the present application; FIG. 8A is a schematic perspective view of a piston member according to the first embodiment of the present application; FIG. 8B is a schematic semi-sectional view of the piston member according to the first embodiment of the present application; FIGS. 9A to 9D respectively show schematic diagrams of the pump assembly according to the first embodiment of the present application moving to different states; FIGS. 10A and 10B respectively show schematic diagrams of a pump assembly according to a second embodiment of the present application moving to different states; and FIGS. 11A and 11B respectively show schematic diagrams of a pump assembly according to a third embodiment of the present application moving to different states. Detailed Description of Embodiments

[0030] The present invention will be further described below with reference to specific implementations and the drawings, and more details are explained in the following description for the ease of fully understanding the present invention; however, the present invention can obviously be implemented in various different manners than 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 the specific implementations.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs. The terms used herein are merely intended to describe the specific embodiments, but are not intended to limit the present application. The terms "comprise" and "have" and any variations thereof in the description and the claims of the present application as well as the brief description of the drawings described above are intended to cover non-exclusive inclusion.

[0032] FIG. 1 shows an exemplary configuration of a container 1000 having a function of discharging contents. The container 1000 includes a pump assembly 1 and a container body 2. The pump assembly 1 is mounted on the container body 2 and is configured to discharge contents CW from the container body 2.

[0033] In order 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.First embodiment:

[0034] 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.

[0035] It should be understood that the drawings are merely used as examples, and are not necessarily drawn to scale, and should not be taken as a limitation to the actually claimed scope of protection of the present invention.

[0036] Referring to FIGS. 2 and 3, the pump assembly 1 includes a main housing 10, a built-in member 11, and a pressing rod assembly 12. The pressing rod assembly 12 includes a pressing rod body 120, an inner sleeve member 121, and a piston member 122. The structures and assembly relationship of the above components are further described in detail below with reference to the figures.

[0037] 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 has a housing bottom wall 101 at the other end. A pump suction port 102 is provided at the center of the housing bottom wall 101. As shown in FIG. 1, it can be understood that the interior of the main housing 10 is in communication with the container body 2 through the pump suction port 102, so that the contents CW in the container body 2 can enter the main housing 10 through the pump suction port 102. It can be understood that, in the structure as shown, the housing bottom wall 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 contents CW into the main housing 10. In some other suitable embodiments, the housing bottom wall 101 may also be arranged at the end portion of the main housing 10, and the suction tube 3 is connected to the housing bottom wall 101 by means of other connection structures such as a snap-fit fastener.

[0038] It can be understood that in the implementation as shown, the main part of the pump assembly 1 may be substantially a rotating body that rotates around its central axis. Therefore, for convenience, reference may 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 the pump assembly 1), a radial direction (i.e., a direction radiating outward from the central axis of the pump assembly 1 in FIG. 2) and a circumferential direction (i.e., a direction of rotation around the central axis) of the pump assembly 10 in FIG. 2. It should be understood that this description does not limit a specific component of the pump assembly 1 to be circular in cross section. For example, the main housing 10 and / or the built-in member 11 are not necessarily cylinders that are circular in cross section, but may also be tubular members that are square, rectangular, etc. in cross section.

[0039] FIG. 5A shows a schematic perspective view of the built-in member 11, and FIG. 5B shows a schematic semi-sectional view of the built-in member 11. Referring to FIGS. 1, 4 and 5B, it can be understood that the built-in member 11 can be mounted at one end of the main housing 10 from the opening 100. The built-in member 11 includes a top 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 extend downward from the top 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 hole portion running through the top wall 110.

[0040] It will be appreciated that spatial relationship terms such as "upper", "lower", "vertical", "high" and "low" are used herein to describe the relationship between one element or feature and other elements or features shown in the drawings, and refer to 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 besides the orientations described in the drawings. For example, if the assemblies in the drawings are flipped, the orientation of the element described as being "above" another element or feature will be changed to being "below" the another element or feature. Therefore, the spatial relationship descriptors used herein should be interpreted correspondingly.

[0041] FIG. 6A shows a schematic perspective view of the pressing rod body 120, and FIG. 6B shows a schematic semi-sectional view of the pressing rod body 120. A discharge channel 1200 is defined in the pressing rod body 120, and the discharge channel 1200 is configured to direct the discharge of the contents CW. Referring to FIGS. 1, 5B and 6B, it can be understood that the pressing rod body 120 can extend to the interior of the main housing 10 from the through hole 114. A first mating portion 1201 protruding toward the outside of the pressing rod body 120 is provided at an end of the pressing rod body 120 extending to the interior of the main housing 10, and a second mating portion 1202 is provided on an outer periphery of the main body of the pressing rod body 120. The first mating portion 1201 and the second mating portion 1202 are spaced apart by a distance in an axial direction of the pressing rod body 120. The axial direction of the pressing rod body 120 can be understood as the extension direction of the axis of the pressing rod body 120.

[0042] FIG. 7A shows a schematic perspective view of the inner sleeve member 121, and FIG. 7B shows a schematic semi-sectional view of the inner sleeve member 121. Referring to FIGS. 1, 6B and 7B, it can be understood that the inner sleeve member 121 can be mounted on an outer periphery of the pressing rod body 120 in a sleeving manner, and the second mating portion 1201 can engage 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 pressing rod body 120.

[0043] FIG. 8A shows a schematic perspective view of the piston member 122, and FIG. 8B shows a schematic semi-sectional view of the piston member 122. Referring to FIGS. 1, 6B, 7B and 8B, it can be understood that the piston member 122 can be mounted on an outer periphery of the inner sleeve member 121 in a sleeving manner. The piston member 122 has a piston portion 1220 at one end and a third mating portion 1221 at the other end.

[0044] FIGS. 9A to 9D respectively show 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 slidable sealing contact with both an outer wall surface of the inner cylinder wall 111 and an inner wall surface of the outer cylinder wall 112; and in the assembled state, the third mating portion 1221 of the piston member 122 and the inner sleeve member 121 are both located between the first mating portion 1201 and the second mating portion 1202, and the first mating portion 1201 and the second mating portion 1202 jointly limit the movement of the inner sleeve member 121 and the piston member 122 in the axial direction of the pressing rod body 120, that is, the pressing rod body 120, the inner sleeve member 121 and the piston member 122 are assembled into an integral piece by means of the first mating portion 1201 and the second mating portion 1202. In addition, the first mating portion 1201 is in slidable sealing contact with at least part of the interior of the main housing 10.

[0045] It can be understood that the phrase "slidable sealing contact" means that two elements are slidable relative to each other while maintaining sealing between sliding-fit interfaces, which, for example, can be achieved by means of the self-deformability of a material, such as plastic, or by providing sufficient areas of the sliding-fit interfaces. For example, the outer diameter of the inner cylinder wall 111 may 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), so that an interference fit may be formed between them, achieving better sealing performance. It can also be understood that, taking "the outer diameter of the inner cylinder wall 111" as an example, the outer diameter refers to the diameter of a wall surface of the inner cylinder wall 111 located on an outer radial side.

[0046] In this state, when pressure is applied to the end portion of the pressing rod body 120, the integral piece formed by the pressing rod body 120, the inner sleeve member 121 and the piston member 122 can be driven to move in the interior of 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.

[0047] Further, as shown in FIG. 1, a check valve element 4 is provided at the pump suction port 102 of the pump assembly 1. When pressure is applied to the end portion of the pressing rod body 120 to move it to the state as shown in FIG. 9C, the pump assembly 1 and the entire container 1000 have small vertical dimensions and are compact in structure. It is worth mentioning that the pump suction port 102 is always closed by the check valve element 4 (substantially in an inverted cone shape as shown) during this process, such that the contents CW in the container body 20 would not flow out.

[0048] When needed, the pressing rod body 120 may be lifted and moved from FIG. 9C to FIG. 9B to FIG. 9A. During this process, the check valve element 4 gradually opens the pump suction port 102, and part of the contents CW are directed from the container body 2 to the main housing 10 under the action of air pressure, and accumulate between the first mating portion 1201 at the lower part of the pressing rod body 120 and the housing bottom wall 101.

[0049] In the state shown in FIG. 9A, when the pressing rod body 120 is pressed to move from the state shown in FIG. 9A toward 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 pressing rod body 120 moves downward with the piston portion 1220, the pressure difference between the lower chamber 113A and the upper chamber 113B gradually increases, thereby providing an elastic restoring force for the piston portion 1220 to return upward. An elastic restoring force for upward return is applied to both the pressing rod body 120 and the inner sleeve member 121 by the piston portion 1220 by means of the first mating portion 1201 and the second mating portion 1202, that is, providing an elastic restoring force to enable the pressing rod assembly 12 to return upward as a whole. It is worth mentioning that, during the process from FIG. 9A to FIG. 9B to FIG. 9C, the check valve element 4 gradually closes the pump suction port 102. After repeatedly lifting and pressing the pressing rod body 120, enough contents CW accumulate between the first mating portion 1201 at the lower part of the pressing rod body 120 and the housing bottom wall 101 and are then discharged via the discharge channel 1200. Reference may be made to Chinese invention patent CN 109649819 A for the specific process of discharge of the contents by pressing, which will not be repeated here.

[0050] Therefore, in a container 1000 having the pump assembly 1 described above, the pressing rod assembly 12 returns upward as a whole, without the need for a spring, to discharge the contents CW from the container body 2.

[0051] In addition, the pressing rod body 120, the inner sleeve member 121 and the piston member 122 are assembled into an integral piece by means of the first mating portion 1201 and the second mating portion 1202, so that during a manufacturing process, it is only necessary to ensure that the piston member 122 is in slidable sealing contact with the wall of the annular chamber 113 and that the end portion of the pressing rod body 120 is in slidable sealing contact with the interior of the main housing 10. Such an assembly method reduces the machining difficulty of the pressing rod assembly 12, making the pump assembly 1 as a whole easy to manufacture.

[0052] In the description of the embodiments of the present application, the 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 indicated technical features. In the description of the embodiments of the present application, the phrase "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0053] It can be understood that two orientations "perpendicular", "consistent", "parallel" and the like mentioned herein do not need to meet the strict requirements for angles in the mathematical sense, but allow a certain tolerance range, for example, it differs from the angle required in the mathematical sense by 20° or less. In addition, the expression of "along a direction" or "in a direction" means that there is at least a component in this 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 this direction. It can be further understood that unless otherwise stated, all ranges mentioned herein include the mentioned endpoint values.

[0054] Optionally, in some specific implementations of the first embodiment, as shown in FIG. 6A, the first mating portion 1201 and the second mating portion 1202 are each of a protruding ring structure protruding from the pressing rod body 120. The protruding ring structure can be understood as a ring-shaped structure protruding outward from the outer contour of the pressing rod body 120. Specifically, the first mating portion 1201 may be an outwardly protruding first protruding ring arranged at one end of the pressing rod body 120, and the second mating portion 1202 may be a second protruding ring protruding from the main body of the pressing rod body 120. In addition, as shown in FIG. 8B, the third mating portion 1221 is also a protruding ring, that is, a third protruding ring, protruding from an inner side surface of the piston member 122 toward the inside of the piston member 122. In the assembled state as shown in FIG. 1, 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 manner, that is, the inner sleeve member 121 and the third protruding ring are clamped between the first protruding ring and the second protruding ring in an interference fit manner, so that the pressing rod body 120, the inner sleeve member 121 and the piston member 122 are assembled into an integral piece. In some other optional embodiments, the first mating portion 1201 and / or the second mating portion 1202 and / or the third mating portion 1221 may be of other configurations different from the protruding ring structure, such as a snap-fit structure or a hook structure, which can limit the relative movement of the pressing rod body 120, the inner sleeve member 121 and the piston member 122.

[0055] Further, on the basis of the embodiment described above, optionally, a fourth protruding ring 1211 protruding toward the inside of the inner sleeve member 121 is provided at 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 in the axial direction of the pressing rod body. With the arrangement of the fourth protruding ring 1211 engaging with the second protruding ring, rather than the end portion of the inner sleeve member 121 being directly configured 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, that is, in a contact fit state, so as to facilitate the disassembly of the pressing rod assembly 12.

[0056] Still referring to FIGS. 9A and 9B, in the first embodiment, the built-in member 11 is mounted at one end of the main housing 10, and the movement of the built-in member 11 toward the interior of the main housing 10 is limited by at least part of the main housing 10, that is, the built-in member 11 mounted at 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 an embodiment, as shown in FIG. 4, the main housing 10 includes a first housing 10A and a second housing 10B, the inner diameter of the first housing 10A is larger than the inner diameter of the second housing 10B, so that a shoulder 104 located in the interior of 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 shoulder 104 can abut against the other end 115 of the built-in member 11 opposite the top wall 110 to limit the movement of the built-in member 11 toward the interior of the main housing. That is, it can be understood that, in the placement state as shown, the built-in member 11 is supported on an upper surface of the shoulder 104. In addition, in this embodiment, the first mating portion 1201 is in slidable sealing contact with the inner wall of the second housing 10B. Optionally, in some other embodiments different from the embodiment as shown, the built-in member 11 may be fixedly connected to one end of the main housing 10 by means of, for example, snap-fit connection, which can also limit the movement of the built-in member 11 toward the interior of the main housing 10. However, with the arrangement of the second housing 10B having a smaller inner diameter, the first mating portion 1201, that is, the first protrusion, is in slidable sealing contact with the inner wall of the main housing 10 without the need for protruding too much.

[0058] Further, still referring to FIGS. 9A to 9C, in the first embodiment, a fourth mating portion 51 is further provided on the outer side of the top wall 110 of the built-in member 11, the fourth mating portion 51 is arranged corresponding to the through hole 114 of the top wall 110, and a fifth mating portion 1203 is further provided on the outer periphery of the main body of the pressing rod body 120. An external force is applied to the end portion of the pressing rod assembly 12 to enable the pressing rod assembly 12 to move toward the housing bottom wall 101 until it moves to the state as shown in FIG. 9C, and in this state, the fifth mating portion 1203 moves to a position in which it engages with the fourth mating portion 51, and the engagement of the fourth mating portion 51 with the fifth mating portion 1203 limits the further extension of the pressing rod assembly 12 toward the interior of the main housing 10. In addition, in this state, the end of the pressing rod body 120 extending to the interior of the main housing is spaced apart from the housing bottom wall 101 by a distance H, with the piston portion 1220 abutting against the shoulder 104.

[0059] Further, referring to FIGS. 8B and 9C, the piston member 122 is further provided with a reinforcement portion 1222. The reinforcement portion 1222 is correspondingly arranged on the outer periphery of the piston portion 1220, and when the fourth mating portion 51 engages with the fifth mating portion 1203, the reinforcement portion 1222 abuts against the shoulder 104. The arrangement of the reinforcement 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 with the shoulder 104.

[0060] Further, referring to FIGS. 9A to 9D, a sixth mating portion 1204 is further provided on the outer periphery of the main body of the pressing rod body 120, and a seventh mating portion 52 arranged corresponding to the through hole 114 is further provided on the outer side of the top wall 110 of the built-in member 11. When the fourth mating portion 51 engages with the fifth mating portion 1203 as shown in FIG. 9C, a further external force is applied to the end portion of the pressing rod assembly 12 to enable the fourth mating portion 51 to be disengaged from the fifth mating portion 1203, and at the same time, since the piston portion 1220 abuts against the shoulder 104, under the interaction between them, an external force can be applied to the second mating portion 1202 to enable the second mating portion 1202 to be disengaged from the end portion of the inner sleeve member 121 and allow the inner sleeve member 121 and the piston member 122 to move in the axial direction of the pressing rod body 120. In this embodiment, in a preferred implementation, a fourth protruding ring 1211 is provided at the end portion 1210 of the inner sleeve member 121, so that when a sufficiently large external force is applied, the fourth protruding ring 1211 can elastically deform to enable the fourth protruding ring 1211 to be disengaged from the second protruding ring, that is, in a contact fit state. When the fourth protruding ring 1211 is disengaged from the second protruding ring, the piston portion 1220 is pushed upward under the action of air pressure, so as to drive the piston member 122 and the inner sleeve member 121 to return along the pressing rod body 120 to the built-in member 11, as shown in FIG. 9D. In addition, during the change from the state shown in FIG. 9C to the state shown in FIG. 9D, the spacing by the distance H allows further movement of the pressing rod body 120 toward the housing bottom wall 101 until the end of the pressing rod body 120 extending to the interior of the main housing abuts against the housing bottom wall 101. In this state, the sixth mating portion 1204 moves to a position in which it engages with the seventh mating portion 52, and the engagement of the seventh mating portion 1204 with the sixth mating portion 52 limits the movement of the pressing rod body 120 in the interior of the main housing 10. In addition, in the state shown in FIG. 9D, the pressing rod body 120 cannot move downward or upward in the main housing 10. That is, the pressing rod body 120 is locked in position when the seventh mating portion 1204 engages with the sixth mating portion 52. In the state shown in FIG. 9D, pulling the pressing rod body 120 upward under an external force enables the seventh mating portion 1204 to be disengaged from the sixth mating portion 52, so as to restore the pressing 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 storage state, so that when the pump assembly is used in a container, most of it can be stored in the container, thereby improving the portability of the pump assembly and the container having the pump assembly. In addition, since the piston portion 1220 withstands greater gas pressure when the piston member 122 moves to a relatively low position, if the pump assembly is stored in this state, the piston portion 1220 itself will be greatly worn over time. By design, when the pressing rod body 120 is compressed to the interior of the main housing 10, the distance H is reserved, so that the pressing rod body 120 can first be disengaged from the piston member 122 and the inner sleeve member 121 to enable the piston member 122 and the inner sleeve member 121 to return, and then the pressing rod body 120 that extends longer outside the container body is stored, which ensures the storability of the pump assembly itself, and can also prevent wear of the piston portion 1220, prolonging the service life of the pump assembly.

[0061] Optionally, as shown in FIGS. 9A to 9D, the pump assembly further includes a cap 5 arranged on the outer periphery of one end of the main housing 10, a center hole 50 is provided at the center of the cap 5, and in the assembled state, the center hole 50 is aligned with the through hole 114. The fourth mating portion 51 is an upper surface of the cap 5, and correspondingly, the fifth mating portion 1203 is a protruding ring or a protrusion arranged on the outer periphery of the pressing rod body 120, and the protruding portion abuts against the upper surface of the cap 5 to limit further extension of the pressing rod body 120 to the interior of the main housing 10. The seventh mating portion 52 is arranged on an inner periphery of the center hole 50. Specifically, in the embodiment as shown, the seventh mating portion 52 is an annular groove arranged on the inner periphery of the center hole 50, and the sixth mating portion 1204 is a protruding ring or a protrusion arranged on the outer periphery of the pressing rod body 120. The protruding ring or the protrusion is clamped with the annular groove to lock the pressing rod body 120 in the cap 5. Of course, in some other suitable embodiments, the seventh mating portion 52 may also be a protrusion, and the corresponding sixth mating portion 1204 may be an annular groove. In another embodiment, no cap 5 may be provided, and a ring-shaped member may be provided protruding from the outer side of the top wall 110 of the built-in member 11, and the fourth mating portion and the seventh mating portion are arranged in the ring-shaped member.

[0062] The phrase "embodiment" mentioned herein means that the specific features, structures, or characteristics described in conjunction with the embodiment can be encompassed in at least one embodiment of the present application. This phrase at various locations in the description does not necessarily refer to the same embodiment, or an independent or alternative embodiment exclusive of another embodiment. Those skilled in the art understand explicitly or implicitly that the embodiment described herein may be combined with another embodiment.Second embodiment

[0063] In the second embodiment, there are variants or changes compared to the first embodiment, and only the variants or changes are described below.

[0064] FIGS. 10A and 10B show schematic diagrams of the second embodiment. In the second embodiment, a fourth mating portion is also provided on an outer side of a top wall 110' of a built-in member 11', and the fourth mating portion can be understood as the upper surface of the cap in the first embodiment. The fourth mating portion is arranged corresponding to a through hole 114', and a fifth mating portion 1203' is provided on an outer periphery of a main body of a pressing rod body 120'.

[0065] In the second embodiment, when an external force is applied to an end portion of a pressing rod assembly, the pressing rod assembly can be moved toward a housing bottom wall 101' until an end of the pressing rod body 120' extending to the interior of the main housing abuts against the housing bottom wall 110', that is, as shown in FIG. 10B. In this state, the fifth mating portion 1203' moves to a position in which it engages with the fourth mating portion, that is, for example, where it abuts against the upper surface of the cap in the first embodiment, and the engagement of the fourth mating portion with the fifth mating portion 1203' limits further movement of the pressing rod assembly toward the interior of the main housing 10'.

[0066] That is, compared with the first embodiment, in the second embodiment, when the fourth mating portion abuts against the fifth mating portion 1203', the pressing rod body 120' and the housing bottom wall 101' also abut against each other, and are not spaced apart by the distance H as described in the first embodiment.Third embodiment

[0067] In the third embodiment, there are variants or changes compared to the first embodiment, and only the variants or changes are described below.

[0068] FIGS. 11A and 11B show schematic diagrams of the third embodiment. In the third embodiment, the main housing does not have a first housing or a second housing, but instead includes an inner cylinder housing 1001 and an outer cylinder housing 1002 both protruding upward from a housing bottom wall 101". The outer cylinder housing 1002 is located at a 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. A built-in member 11" is configured to be movable in the outer cylinder housing 1002 from a higher position to a lower position in which the outer cylinder wall of the built-in member 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 pressing rod assembly, the built-in member 11" moves toward the housing bottom wall 101" together with the pressing rod assembly. In addition, during the movement, the first mating portion 1201" is in slidable sealing contact with an outer wall of the inner cylinder housing 1001.

[0069] In this embodiment, since the built-in member 11" moves toward the housing bottom wall 101" together with the pressing rod assembly, it is also possible to facilitate the storage of the pump assembly.

[0070] On the other hand, according to some embodiments of the present application, a container having a function of discharging contents is further provided. As shown in FIG. 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 is configured to discharge contents CW from the container body 2.

[0071] In the description of the embodiments of the present application, the term "and / or" is merely intended to describe the associated relationship of associated objects, indicating that three relationships can exist, for example, A and / or B can include: only A exists, both A and B exist, and only B exists. In addition, the character " / " herein generally indicates that the associated objects before and after the character are in a relationship of "or".

[0072] In the description of the embodiments of the present application, unless otherwise explicitly specified and defined, the technical terms such as "mount", "connected", "connect" and "fix" should be interpreted in a broad sense, for example, they may be a fixed connection, a detachable connection, or integration; may be a mechanical connection or an electric connection; and may be a direct connection or an indirect connection through an intermediate medium, and may be communication between interiors of two elements or interaction between two elements. For those of ordinary skill in the art, the specific meaning of the terms mentioned above in the embodiments of the present application should be construed according to specific circumstances.

[0073] Finally, it should be noted that the above embodiments are merely used for illustrating rather than limiting the technical solutions of the present application. Although the present application has been illustrated in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features thereof may be equivalently substituted; and such modifications or substitutions do not make the essence of the corresponding technical solution depart from the scope of the technical solutions of the embodiments of the present application, and should fall within the scope of the claims and the description of the present application. In particular, the technical features mentioned in the embodiments can be combined in any manner, provided that there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein but includes all the technical solutions that fall within the scope of the claims.

Examples

first embodiment

[0034]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.

[0035]It should be understood that the drawings are merely used as examples, and are not necessarily drawn to scale, and should not be taken as a limitation to the actually claimed scope of protection of the present invention.

[0036]Referring to FIGS. 2 and 3, the pump assembly 1 includes a main housing 10, a built-in member 11, and a pressing rod assembly 12. The pressing rod assembly 12 includes a pressing rod body 120, an inner sleeve member 121, and a piston member 122. The structures and assembly relationship of the above components are further described in detail below with reference to the figures.

[0037]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 has a housing bottom w...

second embodiment

[0063]In the second embodiment, there are variants or changes compared to the first embodiment, and only the variants or changes are described below.

[0064]FIGS. 10A and 10B show schematic diagrams of the second embodiment. In the second embodiment, a fourth mating portion is also provided on an outer side of a top wall 110' of a built-in member 11', and the fourth mating portion can be understood as the upper surface of the cap in the first embodiment. The fourth mating portion is arranged corresponding to a through hole 114', and a fifth mating portion 1203' is provided on an outer periphery of a main body of a pressing rod body 120'.

[0065]In the second embodiment, when an external force is applied to an end portion of a pressing rod assembly, the pressing rod assembly can be moved toward a housing bottom wall 101' until an end of the pressing rod body 120' extending to the interior of the main housing abuts against the housing bottom wall 110', that is, as shown in FIG. 10B. In th...

third embodiment

[0067]In the third embodiment, there are variants or changes compared to the first embodiment, and only the variants or changes are described below.

[0068]FIGS. 11A and 11B show schematic diagrams of the third embodiment. In the third embodiment, the main housing does not have a first housing or a second housing, but instead includes an inner cylinder housing 1001 and an outer cylinder housing 1002 both protruding upward from a housing bottom wall 101". The outer cylinder housing 1002 is located at a 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. A built-in member 11" is configured to be movable in the outer cylinder housing 1002 from a higher position to a lower position in which the outer cylinder wall of the built-in member 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 pressing rod assembly, the ...

Claims

1. A pump assembly adapted to be mounted on a container body, the pump assembly comprising: a main housing having an opening at one end and a housing bottom wall at the other end, a pump suction port being provided at the center of the housing bottom wall, and the interior of the main housing being in communication with the container body through the pump suction port; a built-in member mountable at the one end of the main housing from the opening and comprising a top wall, an inner cylinder wall and an outer cylinder wall, the inner cylinder wall and the outer cylinder wall both extending downward from the top wall, an annular chamber being formed between the outer cylinder wall and the inner cylinder wall, and the inner cylinder wall enclosing a through hole; and a pressing rod assembly comprising: a pressing rod body extendable from the through hole to the interior of the main housing, a first mating portion protruding toward the outside of the pressing rod body being provided at an end of the pressing rod body extending to the interior of the main housing, a second mating portion being provided on an outer periphery of a main body of the pressing rod body, and the first mating portion and the second mating portion being spaced apart by a distance in an axial direction of the pressing rod body; an inner sleeve member mountable on an outer periphery of the pressing rod body in a sleeving manner, the second mating portion being engageable with an end portion of the inner sleeve member to limit the movement of the inner sleeve member in the axial direction of the pressing rod body; and a piston member having a piston portion at one end and a third mating portion at the other end, and mountable on an outer periphery of the inner sleeve member in a sleeving manner; wherein in an assembled state, the piston portion is located in the annular chamber and is in slidable sealing contact with both an outer wall surface of the inner cylinder wall and an inner wall surface of the outer cylinder wall, the third mating portion and the inner sleeve member are both located between the first mating portion and the second mating portion, the first mating portion and the second mating portion jointly limit the movement of the inner sleeve member and the piston member in the axial direction of the pressing rod body, and the first mating portion is in slidable sealing contact with at least part of the interior of the main housing.

2. The pump assembly according to claim 1, wherein the first mating portion is an outwardly protruding first protruding ring arranged at one end of the pressing rod body, the second mating portion is a second protruding ring arranged on the main body of the pressing rod body, and the third mating portion is a third protruding ring protruding toward the inside of the piston member; wherein in the assembled state, the inner sleeve member and the third protruding ring are fitted between the first protruding ring and the second protruding ring in an interference fit manner.

3. The pump assembly according to claim 2, wherein a fourth protruding ring protruding toward the inside of the inner sleeve member is provided at the end portion of the inner sleeve member, and the fourth protruding ring engages with the second protruding ring to limit the movement of the inner sleeve member in the axial direction of the pressing rod body.

4. The pump assembly according to claim 1, wherein the built-in member is mounted at the one end of the main housing, and the movement of the built-in member toward the interior of the main housing is limited by at least part of the main housing.

5. The pump assembly according to claim 4, wherein the main housing comprises a first housing and a second housing, an inner diameter of the first housing being larger than that of the second housing, so that a shoulder located in the interior of the main housing is formed between the first housing and the second housing; wherein the shoulder is capable of abutting against the other end of the built-in member opposite the top wall to limit the movement of the built-in member toward the interior of the main housing, and the first mating portion is in slidable sealing contact with an inner wall of the second housing.

6. The pump assembly according to claim 5, wherein a fourth mating portion is further provided on an outer side of the top wall of the built-in member and is arranged corresponding to the through hole, and a fifth mating portion is further provided on the outer periphery of the main body of the pressing rod body; wherein an external force is applied to an end portion of the pressing rod assembly to enable the pressing rod assembly to move toward the housing bottom wall until the end of the pressing rod body extending to the interior of the main housing abuts against the housing bottom wall, and in this state, the fifth mating portion moves to a position in which the fifth mating portion engages with the fourth mating portion, and the engagement of the fourth mating portion with the fifth mating portion limits further movement of the pressing rod assembly toward the interior of the main housing.

7. The pump assembly according to claim 5, wherein a fourth mating portion is further provided on an outer side of the top wall of the built-in member and is arranged corresponding to the through hole, and a fifth mating portion is further provided on the outer periphery of the main body of the pressing rod body; wherein an external force is applied to the end portion of the pressing rod assembly to enable the pressing rod assembly to move toward the housing bottom wall until the fifth mating portion moves to a position in which the fifth mating portion engages with the fourth mating portion, the engagement of the fourth mating portion with the fifth mating portion limits further movement of the pressing rod assembly toward the interior of the main housing, and in this state, the end of the pressing rod body extending to the interior of the main housing is spaced apart from the housing bottom wall by a distance, with the piston portion abutting against the shoulder.

8. The pump assembly according to claim 7, wherein the piston member is provided with a reinforcement portion correspondingly arranged on an outer periphery of the piston portion, and in the state in which the fourth mating portion engages with the fifth mating portion, the reinforcement portion abuts against the shoulder.

9. The pump assembly according to claim 7, wherein a sixth mating portion is further provided on the outer periphery of the main body of the pressing rod body, and a seventh mating portion arranged corresponding to the through hole is provided on the outer side of the top wall of the built-in member; wherein in the state in which the fourth mating portion engages with the fifth mating portion, a further external force is applied to the end portion of the pressing rod assembly, which enables the fourth mating portion to be disengaged from the fifth mating portion, and under the action of the piston portion abutting against the shoulder, enables the second mating portion to be disengaged from the end portion of the inner sleeve member and allows the inner sleeve member and the piston member to move in the axial direction of the pressing rod body; and the spacing by a distance allows the pressing rod body to further move toward the housing bottom wall until the end of the pressing rod body extending to the interior of the main housing abuts against the housing bottom wall, and in this state, the sixth mating portion moves to a position in which the sixth mating portion engages with the seventh mating portion, and the engagement of the seventh mating portion with the sixth mating portion limits the movement of the pressing rod body in the interior of the main housing.

10. The pump assembly according to claim 9, further comprising a cap arranged on an outer periphery of the one end of the main housing, a center hole is provided at the center of the cap, and in the assembled state, the center hole is aligned with the through hole, wherein the fourth mating portion is an upper surface of the cap, and the seventh mating portion is arranged on an inner periphery of the center hole.

11. The pump assembly according to claim 1, wherein the main housing further comprises an inner cylinder housing and an outer cylinder housing both protruding upward from the housing bottom wall, the outer cylinder housing being located at a periphery of the inner cylinder housing, so that an annular space is defined between the outer cylinder housing and the inner cylinder housing; wherein the built-in member is configured to be movable from a lower position, in which the outer cylinder wall of the built-in member is at least partially located in the annular space, to a higher position in the outer cylinder housing, and during the movement, the first mating portion is in slidable sealing contact with an outer wall of the inner cylinder housing.

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

13. A container having a function of discharging contents, the container 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 mounted on the container body and configured to discharge contents from the container body.

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