Container and pump assembly thereof

Abstract

A pump assembly (10) suitable for attachment to a container body (20) includes a pressure bar (2), a main housing (3), and a built-in member (1), the main housing (3) has an inner cylindrical housing (32) surrounding a cylindrical cavity (S1), and an annular space (S2) is defined between the outer cylindrical housing (33) and the inner cylindrical housing (32). An annular cavity (S3) is defined between the outer cylindrical wall (13) and the inner cylindrical wall (12) of the built-in member (1). The bottom wall (22) of the connection part of the pressure bar (2) is provided in the cylindrical cavity (S1), the side wall (23) of the connection part of the pressure bar (2) is in sealing contact with the inner wall surface (32n) of the inner cylindrical housing (32) so as to be slidable, and the piston part (24) is provided in the annular cavity (S3) and is in sealing contact with the outer wall surface (12u) of the inner cylindrical wall (12) and the inner wall surface (13n) of the outer cylindrical wall (13) so as to be slidable. The built-in member (1) is provided in the outer cylindrical housing (33) so as to be movable from a low position (PL) to a high position (PH). The container (100) has a function of discharging contents and includes a pump assembly (10).

Description

[Technical field]

[0001] The present invention relates to a pump assembly and further to a container having a function for discharging contents. [Background technology]

[0002] In daily life, we often use containers that have a function to discharge contents such as hand soap, medicine, cosmetics, shampoo, etc. In these containers, the contents can be discharged by pressing the presser bar. Chinese Patent CN110155489A describes a pump assembly and a container with a function of discharging contents. In the pump assembly of the container, the outer wall surface of the first inner casing side wall, the inner wall surface of the second inner casing side wall and the inner casing top wall define a first cavity having a first opening, the piston part is provided in the first cavity and is in sliding sealing contact with the outer wall surface of the first inner casing side wall and the inner wall surface of the second inner casing side wall, respectively, to partition the first gas cavity and the second gas cavity in the first cavity, the first gas cavity forms a sealed cavity defined by the piston part, the inner casing top wall, the outer wall of the first inner casing side wall and the inner wall surface of the second inner casing side wall, and the rod body is pressed to drive the piston part to draw the first gas cavity and compress the second gas cavity, so that the contents of the container body are discharged through the discharge passage. Since the piston part is adapted to be repelled by the combined force of the gas pressure in the first gas cavity and the gas pressure in the second gas cavity, to repel the rod body, thereby pressing the rod body again, the pump body does not need to be provided with a spring for repelling the rod body, and the pump assembly is made entirely of plastic materials, without any mixing of metal materials, making the pump assembly easy to recycle. Due to shipping costs, packaging material requirements, etc., such containers often require the pressure bar to be easily pressed to the bottom to reduce the overall height dimension of the container, thereby occupying less space during shipping and requiring less packaging material. Therefore, there is a need to provide an improved pump assembly so that a container having a pump assembly can easily urge the pressure bar to the bottom without the need for a spring. Summary of the Invention

[0003] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a pump assembly and a container which realizes the rebound of the pressure bar without the use of a spring and allows the pressure bar to be easily pressed to the bottom.

[0004] The present invention provides a pump assembly suitable for mounting on a container body, comprising a presser bar having a rod body, a connection part bottom wall, a connection part side wall and a piston part, the lower end of the rod body being connected to the connection part bottom wall, the connection part side wall protruding upward from the connection part bottom wall and being installed on the outer periphery of the rod body. The pump assembly further comprises a main housing and a built-in member. The main housing has a bottom housing, an inner cylinder housing and an outer cylinder housing, the inner cylinder housing and the outer cylinder housing all protruding upward from the bottom housing, the inner cylinder housing encloses a cylindrical cavity, the outer cylinder housing is located on the outer periphery of the inner cylinder housing to define an annular space between the inner cylinder housing and the outer cylinder housing, and the bottom housing is provided with a pump suction port in a middle portion surrounded by the inner cylinder housing and communicating with the container body. The built-in member has a top shell wall, an inner cylinder wall, and an outer cylinder wall, and the inner cylinder wall and the outer cylinder wall all protrude downward from the top shell wall, the inner cylinder wall surrounds a through hole through which the rod body passes, and the outer cylinder wall is located on the outer periphery of the inner cylinder wall to define an annular cavity between the inner cylinder wall and the outer cylinder wall. The connection part bottom wall is provided in the cylindrical cavity, the connection part side wall is in slidable sealing contact with the inner wall surface of the inner cylinder housing, and the piston part is provided in the annular cavity and in slidable sealing contact with the outer wall surface of the inner cylinder wall and the inner wall surface of the outer cylinder wall, respectively. The built-in member is provided in the outer cylinder housing so as to be movable from a low position to a high position, and at the low position, the outer cylinder wall of the built-in member is at least partially located within the annular space, and at the high position, the built-in member is provided so as to be lockable at the high position by a locking structure.

[0005] In one embodiment, the outer tube wall and the outer tube housing are slidingly engaged by a slider sliding into a vertical chute, and the slider and the vertical chute are provided on a first side and a second side of the outer wall surface of the outer tube wall and the inner wall surface of the outer tube housing, respectively. In one embodiment, a circumferential chute is provided on the second side, the circumferential chute is connected to the vertical chute, and at the high position, the built-in member is locked in the high position by the slider sliding circumferentially into the circumferential chute, and the slide and the circumferential chute constitute the locking structure. In one embodiment, the circumferential chute is provided with a protrusion having a side surface that gradually becomes higher from the proximal side to the distal side of the longitudinal chute in the circumferential direction. In one embodiment, a vertically extending convex rib is provided on one of the inner wall surface of the inner tube wall and the outer peripheral surface of the rod body, and a concave groove that slides in engagement with the convex rib is provided on a second of the inner wall surface of the inner tube wall and the outer peripheral surface of the rod body. In one embodiment, the first side is an outer wall surface of the outer cylinder wall. In one embodiment, the pump assembly includes a circumferentially distributed plurality of the sliders and a corresponding plurality of the longitudinal chutes. In one embodiment, the pump assembly is configured to allow, when the built-in member is in the low position, the bottom wall of the connection portion of the pressure bar to abut against the bottom housing of the main housing, and a vertical gap to be formed between the lower end of the outer tube wall of the built-in member and the bottom housing, and / or the piston portion of the pressure bar to abut against the top shell wall of the built-in member and be located above the inner tube housing of the main housing. In one embodiment, the pump assembly is configured so that, when the built-in member is in the high position, the pressure bar moves downward relative to the built-in member until it abuts the bottom housing of the main housing, and the piston portion is always in sealing contact with the outer wall surface of the inner cylindrical wall and the inner wall surface of the outer cylindrical wall, respectively, and / or the height difference between the lower ends of the inner cylindrical wall and the outer cylindrical wall of the built-in member and the upper end of the inner cylindrical housing of the main housing is less than 10% of the height of the outer cylindrical housing.

[0006] The present invention provides a container having a content discharge function, comprising a container body, the container further comprising the pump assembly, the pump assembly being attached to the container body and discharging the contents within the container body. In the above pump assembly and container, the piston part of the pressure bar is provided in the annular cavity between the outer and inner cylinder walls of the built-in member, so that in the process of pressing down the pressure bar, a restoring force that bounces the pressure bar upwards can be provided by the pressure difference between the upper and lower sides of the piston part, and the main housing has an inner cylinder housing provided inside the outer cylinder housing, and the bottom wall of the connection part is installed in a cylindrical cavity surrounded by the inner cylinder housing, and the outer cylinder wall of the built-in member is aligned with the annular space between the outer and inner cylinder housings, so that the pressure bar can be smoothly pressed to the bottom. Therefore, the rebound of the pressure bar can be realized without providing a spring, and the pressure bar can be easily pressed to the bottom. The structure of the entire pump assembly and container is compact, which can save packaging and transportation costs. [Brief description of the drawings]

[0007] The above and other features, nature and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and examples. FIG. 1A is a schematic diagram showing a state in which the presser bar and the built-in member are both at the lowest positions in the container, and at this time, the vertical dimension of the entire container is at its smallest. FIG. 1B is a schematic diagram showing a state in which the pressure bar and the built-in member are both at the highest positions in the container, and at this time, the vertical dimension of the entire container is at its largest. FIG. 1C is a schematic diagram showing a state in which the built-in member is at the highest position and the presser bar is at the lowest position in the container. FIG. 2 is a schematic diagram showing a state in which the presser bar and the built-in member are both at the lowest positions in the pump assembly. FIG. 3 is a schematic diagram showing a state in which the presser bar and the built-in member are both in an intermediate position in the pump assembly. FIG. 4 is a schematic diagram showing a state in which the presser bar and the built-in member are both in the highest position in the pump assembly. FIG. 5A is a plan view of the slider on the outer cylinder wall of the built-in member and the vertical chute of the outer cylinder housing of the main housing when they are fitted together. FIG. 5B is a schematic diagram of the slider on the outer cylinder wall of the built-in member sliding from the state of FIG. 5A into the circumferential chute of the outer cylinder housing of the main housing. FIG. 5C is a schematic diagram of the slider on the outer cylinder wall of the built-in member further sliding from the state shown in FIG. 5B to a state locked by the circumferential chute. FIG. 6 is a schematic diagram showing the pump assembly with the built-in member in the highest position and the presser bar in the intermediate position. FIG. 7 is a schematic diagram showing the pump assembly with the built-in member in the highest position and the presser bar in the lowest position. FIG. 8A is a schematic diagram showing a state in which the check valve at the tip of the presser bar blocks the discharge passage. FIG. 8B is a schematic diagram showing a state in which the check valve at the tip of the presser bar opens the discharge passage. FIG. 8C is a schematic diagram showing the three-dimensional structure of the presser bar and the head cap. FIG. 9 is a perspective view showing the three-dimensional structure of the outer cylinder housing of the main housing and the bar body of the presser bar. FIG. 10 is a perspective view of the check valve body at the tip of the pressure bar. FIG. 11 is a plan view of the check valve body of FIG. FIG. 12 is a partially enlarged view of E in FIG. 1B. FIG. 13 is a perspective view showing an exploded structure of the head cap and the presser cap. FIG. 14 is a schematic diagram showing a state in which the protrusion of the head cap is in the retreat space. 15 is a schematic diagram showing a state in which the protrusion of the head cap is fitted into the recess of the presser cap.

[0008] The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings. In the following description, various details are described to facilitate a full understanding of the present invention, but it is clear that the present invention can be implemented in other forms different from the above description, and those skilled in the art can extend and infer the present invention according to the actual application situation without departing from the spirit of the present invention, so it goes without saying that the scope of protection of the present invention is not limited to the specific embodiments described above.

[0009] For example, "a first feature is formed above or on a second feature" as described later in this specification may include embodiments in which the first and second features are formed in direct association, and may also include embodiments in which an additional feature is formed between the first and second features, whereby there is no direct association between the first and second features. Furthermore, when a first element is described as being connected or coupled to a second element, this description includes embodiments in which the first and second elements are directly connected or coupled to one another, and also includes embodiments in which the first element is indirectly connected to or coupled to the second element through the addition of one or more other intervening elements. 1A, 1B, and 1C show an exemplary configuration of a container 100 having a content discharge function in different states. The container 100 has a container body 20. The container 100 further includes a pump assembly 10. The pump assembly 10 is attached to the container body 20 and discharges the content CW in the container body 20.

[0010] 2 to 9 show an exemplary configuration of the pump assembly 10. As described above, the pump assembly 10 is suitable for attachment to the container body 20. It should be noted that the accompanying drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the scope of protection actually claimed by the present invention.

[0011] Referring to FIG. 2, the pump assembly 10 includes a pressure bar 2. FIGS. 8A to 8C show an exemplary configuration of the pressure bar 2. In accordance with FIGS. 2 and 8A to 8C, the pressure bar 2 has a rod body 21, a connection part bottom wall 22, a connection part side wall 23, and a piston part 24. The rod body 21 defines a discharge passage 210. A lower end 21w of the rod body 21 is connected to the connection part bottom wall 22. The connection part side wall 23 is provided on the outer periphery of the rod body 21, protruding upward from the connection part bottom wall 22. The piston part 24 is connected to an upper end 23h of the connection part side wall 23. In the drawings, the discharge passage 210 is also a rod hole of the presser bar 2 (specifically, the rod body 21). It should be noted that, in this specification, spatial relationship terms such as "upper", "lower", "vertical", "higher", and "lower" are used to describe the relationship between one element or feature and another element or feature shown in the accompanying drawings, but this is for ease of explanation with reference to the orientation in the normal state shown in Figures 1A, 1B, and 1C, and these spatial relationship terms are intended to include other orientations of the elements or assemblies in use or operation other than the orientation depicted in the accompanying drawings. For example, if the assembly in the accompanying drawings is inverted, the orientation of an element described as being above another element or feature will change to being below the other elements or features, and the spatial relationship descriptive terms used in this text should be interpreted accordingly. The pump assembly 10 further includes a main housing 3 and an internal member 1. Referring to FIG. 6, the main housing 3 includes a bottom housing 31, an inner cylinder housing 32, and an outer cylinder housing 33. The inner cylinder housing 32 and the outer cylinder housing 33 all protrude upward from the bottom housing 31. The inner cylinder housing 32 surrounds a cylindrical cavity S1. The outer cylinder housing 33 is located on the outer periphery of the inner cylinder housing 32 to define an annular space S2 between the inner cylinder housing 32 and the outer cylinder housing 33. The bottom housing 31 is provided with a pump suction port P1 in communication with the container body 20 in a middle portion 310 surrounded by the inner cylinder housing 32. In the illustrated embodiment, the main body of the pump assembly 10 may be a rotating body that rotates approximately around the central axis O1, so that, for convenience, hereinafter, the vertical direction X1 (up and down direction in FIG. 2, i.e., the direction along the central axis O1 of the pump assembly 10), the radial direction R0 (i.e., the direction from the central axis O1 of the pump assembly 10 toward the left or right in FIG. 2), and the circumferential direction C0 (i.e., the direction rotating around the central axis O1, shown in FIG. 5B and FIG. 5C) of the pump assembly 10 in FIG. 2 may also be referred to. Note that this description does not limit the cross section of specific parts of the pump assembly 10 to a circular shape, and for example, the inner cylinder housing 32 and the outer cylinder housing 33 do not need to have a circular cross section, and may be a cylinder having a cross section of another shape such as a square or a rectangle.

[0012] 6, the built-in member 1 has a top shell wall 11, an inner cylinder wall 12, and an outer cylinder wall 13. The inner cylinder wall 12 and the outer cylinder wall 13 both protrude downward from the top shell wall 11. The inner cylinder wall 12 surrounds a through hole H1 through which the rod body 21 passes. The outer cylinder wall 13 is located on the outer periphery of the inner cylinder wall 12 to define an annular cavity S3 between the inner cylinder wall 12 and the outer cylinder wall 13. 2 and 6, the bottom wall 22 of the connection part of the presser bar 2 is provided in the cylindrical cavity S1. The side wall 23 of the connection part of the presser bar 2 is in slidable sealing contact with the inner wall surface 32n of the inner cylinder housing 32. The piston part 24 of the presser bar 2 is provided in the annular cavity S3 and is in slidable sealing contact with the outer wall surface 12u of the inner cylinder wall 12 and the inner wall surface 13n of the outer cylinder wall 13. The term "slidable sealing contact" means that the two elements can slide relative to each other while maintaining a seal between the sliding and fitting interfaces, which can be realized by, for example, the deformable characteristics of the material, plastic itself, and can provide a sufficient area of ​​the sliding and fitting interfaces to maintain the seal. For example, the outer diameter of the cylindrical side wall 23 of the presser bar 2 can be set to be slightly larger than the inner diameter of the inner cylinder housing 32 in a normal state (i.e., when no external force is applied), so that a tight fit can be formed between them, resulting in better sealing performance. Taking "the inner wall surface 32n of the inner cylindrical housing 32" as an example, the inner wall surface 32n refers to the wall surface that is located on the radially inner side of the inner cylindrical housing 32. The built-in member 1 is provided so as to be movable from a low position PL (eg, FIG. 2) to a high position PH (eg, FIG. 6) in the outer cylindrical housing 33. Note that "low" and "high" here are relative terms. At the low position PL, the outer cylinder wall 13 of the built-in member 1 is at least partially located within the annular space S2. As shown in Fig. 2, the outer cylinder wall 13 is located in the annular space S2 with the majority (i.e., more than 50%) of its length in the longitudinal direction X1, that is, between the inner cylinder housing 32 and the outer cylinder housing 33 in the radial direction R0. At the high position PH, the built-in member 1 is set so as to be lockable at the high position PH by the lock structure 4. For example, the built-in member 1 is provided with a radial horizontal hole extending along the radial direction R0 at a predetermined position, and the outer tubular housing 33 is also provided with a corresponding horizontal hole, and when the built-in member 1 reaches the high position PH, an insertion pin can be manually inserted through the radial horizontal hole and the corresponding horizontal hole to insert and connect the built-in member 1 and the outer tubular housing 33, thereby locking the built-in member 1. In other words, the radial horizontal hole, the corresponding horizontal hole, and the insertion pin can be regarded as the lock structure 4.

[0013] In the above pump assembly 10, the bottom wall 22 of the connection part of the presser bar 2 is provided in a cylindrical cavity S1 surrounded by the inner cylindrical housing 32 of the main housing 3 and moves up and down, and the outer cylindrical wall 13 of the built-in member 1 can move up and down in the annular space S2 between the outer cylindrical housing 33 and the inner cylindrical housing 32 of the main housing 3. When the built-in member 1 is not locked at the high position PH via the lock structure 4, the piston part 24 of the presser bar 2 can press the built-in member 1 down to the bottom, for example, to the low position PL in FIG. 2, by sealing contact with the built-in member 1. In this case, the vertical dimension of the pump assembly 10 and the container 100 as a whole is small and the structure is compact, and for example, the container 100 can be packaged, which can save packaging and transportation costs. It is worth noting that during this process, the pump suction port P1 is always closed via the check valve body 9 (approximately reverse tapered in the figure) without the content CW in the container body 20 flowing out. When in use, the pressure bar 2 can be lifted, and at this time the built-in member 1 moves along the vertical direction X1 from the low position P1 in Fig. 2 via the intermediate position PM in Fig. 3 to the high position PH in Fig. 4 following the pressure bar 2, and then can be locked in the high position PH via the locking structure 4. It is noteworthy that in the process from Fig. 2 and Fig. 3 to Fig. 4, the check valve body 9 gradually opens the pump suction port P1, and part of the content CW is accumulated in the cylindrical cavity S1 from the container body 20. After that, the built-in member 1 is held at the high position PH, and the presser bar 2 can be pressed from the upper position in FIG. 4 to the lower position in FIG. 7 through the intermediate position in FIG. 6 relative to the built-in member 1. The piston part 24 can divide the annular cavity S3 into the lower cavity S32 and the closed upper cavity S31 along the vertical direction X1, so that as the presser bar 2 moves downward relative to the built-in member 1, the pressure difference between the lower cavity S32 and the upper cavity S31 becomes large, providing an elastic restoring force for the presser bar 2 to bounce upward. It is worth noting that in the process of FIG. 4, FIG. 6 to FIG. 7, the check valve body 9 gradually closes the pump suction port P1. After repeatedly lifting and pressing the presser bar 2, a sufficient amount of contents CW is accumulated in the cylindrical cavity S1, and then discharged through the discharge passage 210. Therefore, the container 100 equipped with the pump assembly 10 can easily press the presser bar 2 to the bottom without providing a spring.

[0014] As an example of operation, the user can push the air in the cylindrical cavity S1 through the discharge passage 210 in the middle of the presser bar 2 and push it out through the head cap 6 by pressing the head cap 6 connected to the presser bar 2 described later. If the user does not apply any force to the head cap 6, the head cap 6 and the presser bar 2 will rise by repulsion due to the restoring force caused by the pressure difference between the lower cavity S32 and the upper cavity S31 so as to make the cylindrical cavity S1 negative pressure, so that the contents CW in the container body 20, for example, liquid, can be sucked through the pump suction port P1 until the cylindrical cavity S1 is filled. After filling, when the head cap 6 and the presser bar 2 are pressed down again by the user, the liquid in the cylindrical cavity S1 is pressed by the bottom wall 22 of the connection part of the presser bar 2 and pumped out through the discharge passage 210 of the presser bar 2 and the head cap 6. The specific process of discharging the contents by pressing can be referred to, for example, Chinese Patent CN109649819A, and will not be described further here. In addition, the two directions referred to in the present text, such as "perpendicular", "coincident", and "parallel", do not necessarily have to meet mathematically strict angle requirements, but allow a certain error range, for example, allowance for a difference of up to 20° from the mathematically required angle, and "along a certain direction" or "in a certain direction" means that there is at least a component in the direction, and preferably, the angle with the direction is within 45°, more preferably within 20°, 10°, or 5°. In addition, all ranges referred to in the present text include the end values ​​referred to.

[0015] In the illustrated embodiment, the built-in member 1 can move between a high position PH and a low position PL within the outer tubular housing 33 due to a sliding fit between the outer tubular wall 13 and the outer tubular housing 33 . It should be noted that, in the present specification, certain terms are used to describe embodiments of the present invention, e.g., "one embodiment," "another embodiment," and / or "some embodiments" refer to features, structures, or characteristics associated with at least one embodiment of the present invention. Thus, it should be emphasized that "one embodiment" or "another embodiment" referenced two or more times in different locations herein do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present invention may be combined, as appropriate. 5A and 9, the outer tube wall 13 and the outer tube housing 33 can be slidably fitted together by the slider 131 sliding in the vertical chute 331. The slider 131 and the vertical chute 331 may be provided on the first side and the second side of the outer wall surface 13u of the outer tube wall 13 and the inner wall surface 33n of the outer tube housing 33, respectively. That is, when the slider 131 is provided on the outer wall surface 13u of the outer tube wall 13, the vertical chute 331 is provided on the inner wall surface 33n of the outer tube housing 33. The slider 131 may be provided on the inner wall surface 33n of the outer tube housing 33, and in this case, the vertical chute 331 is provided on the outer wall surface 13u of the outer tube wall 13. In the illustrated embodiment, the first side is the outer wall surface 13u of the outer tube wall 13. That is, the second side is the inner wall surface 33n of the outer tube housing 33. In addition, in the present text, terms such as "first" and "second" are used to limit features, but this is merely for the purpose of making it easier to distinguish corresponding features. Unless otherwise specified, the above terms do not have any special meaning and should not be understood as a limitation on the scope of protection of the present invention.

[0016] Continuing to refer to FIG. 9, a circumferential chute 332 can be provided on the inner wall surface 33n (as an example of the second method described above) of the outer cylinder housing 33. The circumferential chute 332 can be connected to the vertical chute 331. At the high position PH, the built-in member 1 can be locked at the high position PH by the slider 131 sliding in the circumferential chute 332 along the circumferential direction C0. The slider 131 and the circumferential chute 332 therein constitute the lock structure 4. The circumferential chute 332 is also a locking groove extending along the circumferential direction C0.

[0017] The pump assembly 10 may include a plurality of sliders 131 distributed in the circumferential direction C0 and a corresponding plurality of longitudinal chutes 331. In the present text, "a plurality" means two or more, including two, three, four, five, etc. In FIG. 5A, the pump assembly 10 may include three sliders 131 evenly distributed along the circumferential direction C0 and three corresponding longitudinal chutes 331. Furthermore, the pump assembly 10 may also include three circumferential chutes 332 that communicate with the three longitudinal chutes 331, respectively. 9, the circumferential chute 332 is provided with a protrusion 3321. The protrusion 3321 has a side surface 3322 (also shown in FIG. 2) that gradually becomes higher from the proximal side to the distal side of the longitudinal chute 331 in the circumferential direction C0. The proximal side of the longitudinal chute 331 is the side close to the longitudinal chute 331 corresponding to the circumferential chute 332, and the distal side is the side away from the longitudinal chute 331 corresponding to the circumferential chute 332. In FIG. 5A, for each longitudinal chute 331, the corresponding circumferential chute 332 extends counterclockwise from the longitudinal chute 331 along the circumferential direction C0. 5A and 9, a convex strip 211 extending along the vertical direction X1 may be provided on a first side of the inner wall surface 12n of the inner cylinder wall 12 and the outer circumferential surface 21u of the rod body 21, and a concave groove 121 that slides with the convex strip 211 may be provided on a second side of the inner wall surface 12n of the inner cylinder wall 12 and the outer circumferential surface 21u of the rod body 21. In the illustrated embodiment, the outer circumferential surface 21u of the rod body 21 is an example of the first side, and the inner wall surface 12n of the inner cylinder wall 12 is an example of the second side. That is, the convex strip 211 extending in the vertical direction X1 is provided on the outer circumferential surface 21u of the rod body 21, and the concave groove 121 that slides with the convex strip 211 is provided on the inner wall surface 12n of the inner cylinder wall 12. In this way, the built-in member 1 can slide-fit with the presser bar 2 via the concave groove 121 and the convex strip 211, and they cannot rotate with each other.

[0018] 2, the pump assembly 10 allows the connection bottom wall 22 of the presser bar 2 to abut against the bottom housing 31 of the main housing 3 when the internal member 1 is in the low position PL, and in FIG. 2, it abuts against the bottom housing 31 via the check valve body 9. When the internal member 1 is in the low position PL, the pump assembly 10 further allows the lower end 13w of the external cylinder wall 13 of the internal member 1 and the bottom housing 31 to have a gap in the vertical direction X1. In other words, when the connection bottom wall 22 of the presser bar 2 abuts against the bottom housing 31 of the main housing 3, the internal member 1 is considered to be in the low position PL, and at this time, the lower end 13w of the external cylinder wall 13 of the internal member 1 does not abut against the bottom housing 31, and there is a gap between the internal member 1 and the bottom housing 31 in the vertical direction X1. When the internal member 1 is in the low position PL, the pump assembly 10 further allows the piston portion 24 of the presser bar 2 to abut against the top shell wall 11 of the internal member 1 and to be above the inner cylinder housing 32 of the main shell 3. That is, the top of the piston portion 24 of the presser bar 2 can abut against the bottom surface of the top shell wall 11 of the internal member 1, and the two cannot continue to move toward each other. When the connection bottom wall 22 of the presser bar 2 abuts against the bottom housing 31 of the main housing 3, the bottom of the piston portion 24 of the presser bar 2 does not interfere with the upper end 32h of the inner cylinder housing 32 of the main housing 3. In FIG. 2, the piston portion 24 of the presser bar 2 is in close contact with the upper end 32h of the inner cylinder housing 32 of the main housing 3, for example, the distance between the lowest point of the piston portion 24 and the upper end 32h of the inner cylinder housing 32 does not exceed 5 mm, and is even close to zero. This can be realized according to a specific size.

[0019] 7, the pump assembly 10, when the internal member 1 is in the high position PH, moves the presser bar 2 downward with respect to the internal member 1 until it abuts against the bottom housing 31 of the main housing 3 (for example, from FIG. 4 to FIG. 6 to FIG. 7), and allows the piston part 24 to always be in sealing contact with the outer wall surface 12u of the internal member cylindrical wall 12 and the inner wall surface 13n of the outer cylindrical wall 13. That is, the piston part 24 does not always leave the annular cavity S3 between the inner cylindrical wall 12 and the outer cylindrical wall 13. In addition, as shown in FIG. 7, when the internal member 1 is in the high position PH, the pump assembly 10 further allows the height difference between the lower ends 12w, 13w of the internal cylindrical wall 12 and the outer cylindrical wall 13 of the internal member 1 and the upper end 32h of the internal cylindrical housing 32 of the main housing 3 to be less than 10% of the height of the outer cylindrical housing 33. The lower end 12w of the outer cylinder wall 13 may be higher than the upper end 32h of the inner cylinder housing 32, may be lower than the upper end 32h of the inner cylinder housing 32, or may be flush with the upper end 32h of the inner cylinder housing 32. For example, in Fig. 7, the lower ends 12w, 13w of the inner cylinder wall 12 and the outer cylinder wall 13 of the built-in member 1 are approximately the same height, and both are approximately flush with the upper end 32h of the inner cylinder housing 32 of the main housing 3. This can be realized according to a specific size.

[0020] 1B, 8A, and 8B, a check valve 5 for allowing fluid to flow out of the discharge passage 210 may be provided at the tip of the discharge passage 210. In other words, the check valve body 5 is provided at the upper end of the pressure bar 2 of the container 100, and allows the contents CW of the container 100 to flow out in one direction from the discharge passage 210 of the pressure bar 2. In other words, the check valve body 5 allows the contents CW to flow out from the discharge passage 210 of the pressure bar 2, and prevents the contents CW from flowing into the discharge passage 210 of the pressure bar 2 from the outside. The container 100 may further include a head cap 6 which, together with the pressure rod 2 and the check valve body 5, constitutes a pressure cap assembly. FIG. 10 shows the three-dimensional structure of the check valve body 5 when it is turned upside down, and FIG. 11 shows the planar structure of the check valve body 5. The check valve body 5 has a column portion 51 and a lid portion 52. As shown in FIG. 8B, the lid portion 52 is connected to the upper end of the column portion 51. In FIG. 11, the cross section of the column portion 51 of the check valve body 5 can be seen, and in particular, the cross section of the discharge passage 210, that is, the hole cross section of the rod hole of the pressing rod 2 (specifically, the rod main body 21), is shown. The cross section is a cross section perpendicular to the extension direction of the column portion 51 or the extension direction of the discharge passage 210 (i.e., the hole depth direction of the rod hole), that is, a cross section extending horizontally in the state of FIG. 1A.

[0021] As shown in Fig. 11, the outer contour of the cross section of the column portion 51 has a plurality of points, for example, point M1. These points are located on the same circular line CL. The outer contour has other points, for example, point M2, located inside the circular line CL, except for the plurality of points. In Fig. 11, the circular line CL is shown by a dashed line. The plurality of points may be points spaced apart from each other. The plurality of points may be partially continuous points, so that a curve can be formed. The circular line CL is scaled down proportionally to the contour line CI of the cross section of the discharge passage 210. The contour line CI is shown by a dashed line in FIG. 11 . That is, the circular line CL can be obtained by scaling down the entire contour line CI. For example, the contour line CI can be scaled down by 98%, thereby obtaining the circular line CL. That is, the circular line CL has the same shape as the contour line CI, but is smaller in size than the contour line CI.

[0022] 8A, the column portion 51 of the check valve body 5 is inserted into the discharge passage 210, and the cover portion 52 is placed on the presser bar 2 to close the discharge passage 210. As a result, the column portion 51 is positioned within the discharge passage 210 via the multiple points M1, and a flow passage S5 is defined between the column portion 51 and the discharge passage 210 via the other point M2, allowing the contents CW to pass through. The check valve body 5 adopts a specific shape for the cross section of the column portion 51 to provide a circulation passage S5 for the contents CW to pass through, and the multiple points M1 enable the column portion 51 to be stably positioned in the discharge passage 210 and to be less likely to shake. In the check valve body 5, the discharge passage 210 may be a round hole. That is, the cross section of the discharge passage 210 is circular. The outer contour of the cross section of the column portion 51 may have a plurality of spaced apart arc segments A0. The arc segments A0 may all be located on the annular line CL, and the plurality of points M1 may constitute the arc segments A0. In this case, the points are divided into a plurality of groups, and the points of each group are continuously distributed to constitute one arc segment A0.

[0023] 10 and 11, the outer contour of the cross section of the pillar 51 may be a cross. Moreover, the outer contour may be a cross and have a plurality of arc segments A0 at the same time. That is, the plurality of arc segments A0 are four arc segments A0, each of which constitutes the outermost surface of each of the four outwardly radiating spokes 511 of the cross. In another embodiment, the line of the outermost surface of each of the spokes 511 constituting the cross may be a straight line segment, and the two end points of the straight line segment belong to the plurality of points and are both located on the circular line CL. 10 and 11, the cover portion 52 may be plate-shaped. As shown in Fig. 11, the outer contour of the cross section of the cover portion 52 surrounds the contour line CI of the discharge passage 210, thereby closing the discharge passage 210, which can be seen in Fig. 8A. In the figure, the outer peripheral surface of the column portion 51 may be a columnar surface. The columnar surface is a curved surface formed by moving a moving line parallel to a constant curve. The moving line is called the directrix of the columnar surface, and the constant curve is called the directrix of the columnar surface. With respect to the outer peripheral surface of the column portion 51, the constant curve is a closed curve. That is, each cross section of the column portion 51 is the same, and not only the shape but also the angular position is the same.

[0024] 11, the distance t1 between the annular line CL and the contour line CI may be within 0.1 mm. In the illustrated embodiment, when the annular line CL is a ring, that is, the radius of the annular line CL is within 0.1 mm smaller than the hole radius of the circular hole that serves as the discharge passage 210. In practice, by setting the minimum gap between the column portion 51 and the discharge passage 210 to within 0.1 mm, the check valve body 5 can be stably positioned in the discharge passage 210 of the presser bar 2. In the presser cap assembly consisting of the presser bar 2 and the head cap 6, the head cap 6 has an outlet passage 61, the presser bar 2 has a discharge passage 210, and the presser bar 2 is connected to the head cap 6. The presser cap assembly may further have the above-mentioned check valve body 5. The lid portion 52 of the check valve body 5 is housed in the outlet passage 61 of the head cap 6, and the column portion 51 of the check valve body 5 is inserted into the discharge passage 210 of the presser bar 2, so that the content CW of the container 100 can flow in one direction from the discharge passage 210 to the outlet passage 61. In the illustrated embodiment, the discharge passage 61 can have a vertical hole 612 and a horizontal hole 611. The lower end of the vertical hole 612 can communicate with the discharge passage 210 (the upper end of the discharge passage 210 in FIG. 8A ), and the upper end of the vertical hole 612 communicates with the horizontal hole 611 (the left end of the horizontal hole 611 in FIG. 8A ). The cover portion 52 of the check valve body 5 is accommodated in the vertical hole 612.

[0025] FIG. 8A shows the state of the presser cap assembly as viewed from the right side of FIG. 1B, and FIG. 12 shows a partially enlarged structure at E in FIG. 1B. In accordance with FIG. 8A and FIG. 12, a convex pillar 62 protruding downward is provided in the vertical hole 612. In the figure, the convex pillar 62 protrudes downward from the upper surface of the vertical hole 612. The convex pillar 62 blocks a part of the cross section of the horizontal hole 611. That is, the protruding height of the convex pillar 62 is sufficient to block a part of the cross section of the horizontal hole 611, for example, blocking 50% of the cross section in height. The cover part 52 of the check valve body 5 is installed so that it can abut against the lower end of the convex pillar 62 to stop further upward movement, as shown in FIG. 8B. By providing the convex pillar 62, it is possible to effectively prevent the cover part 52 from being deflected into the horizontal hole 611.

[0026] 12, the upper end of presser bar 2 fits into vertical hole 612, whereby presser bar 2 is connected to head cap 6. In the figure, a recess 221 can be provided on the outer circumferential surface of the upper end of presser bar 2, and a protrusion 613 can be provided on the inner surface of vertical hole 612. When the upper end of presser bar 2 is inserted into vertical hole 612 and protrusion 613 fits into recess 221, engagement between presser bar 2 and head cap 6 is achieved. Next, the operation process of the check valve body 5 in the container 100 will be described by way of example. Initially, as shown in FIG. 8A, the check valve body 5 is placed on the upper end of the pressure bar 2 via the lid portion 52 due to the action of gravity. In the process of pressing the pressure bar 2 from FIG. 4 to FIG. 6 to FIG. 7, the air or contents CW can move upward from the discharge passage 210 of the pressure bar 2, and when it reaches the upper end of the pressure bar 2, it pushes the check valve body 5 up from FIG. 8A to FIG. 8B. At this time, the contents CW pass through the circulation passage S5 defined between the other point M2 and the discharge passage 210 (the hole wall of the rod hole), then pass through the gap between the lid portion 52 and the vertical hole 612, reach the horizontal hole 611, and are discharged through the discharge passage 61. As a specific example, the vertical length of the column portion 51 of the check valve body 5 is 5.9 mm, the cover portion 52 is a disk with a diameter of, for example, 4.9 mm, a vertical thickness of, for example, 1 mm, a diameter of the annular line CL of, for example, 2.93 mm, and a hole diameter of the discharge passage 210 of, for example, 3 mm. The check valve body 5 can be stably disposed in the discharge passage 210 of the presser bar 2 and is not easily shaken. Furthermore, the check valve body 5 has a simple structure, is easy to manufacture, and is low in cost. The container 100 may further include a presser cap 7 which, together with the head cap 6 and the like, constitutes a presser cap assembly, and the presser cap assembly may further include a presser bar 2. The presser bar 2 is provided on the container body 20 so as to be pressable in a vertical direction X1 (i.e., the up-down direction). The vertical direction X1 is also a direction along the central axis O1 of the container 100, the pump assembly 10, the presser bar 2, etc., and is also called the axial direction of the container 100, the pump assembly 10, the presser bar 2, and is also the pressing action direction of the presser bar 2.

[0027] Figure 13 shows an exploded view of the head cap 6 and the presser cap 7. As shown in Figure 1B, the presser cap 7, often called the large ring, can be attached to the container body 20, and the head cap 6 is connected to the presser bar 2. A first one of the presser cap 7 and the head cap 6 can have an adapting post 81. An outer column surface 811 of the adapting post 81 is provided with a recess 812. A second one of the presser cap 7 and the head cap 6 has an adapting hole 82, and an inner hole surface 821 of the adapting hole 82 is provided with a protrusion 822. In the illustrated embodiment, the first one is the presser cap 7, that is, the second one is the head cap 6. Next, an example in which the adapting post 81 is provided in the presser cap 7 and the adapting hole 82 is provided in the head cap 6 will be described. 13 to 15, the fitting column 81 is provided so as to be insertable into the fitting hole 82, and the head cap 6 is provided so as to be switchable from a first position PC1 (shown in FIG. 15) to a second position PC2 (shown in FIG. 14) in the circumferential direction C0 with respect to the presser cap 7. As shown in FIG. 15, at the first position PC1, the protrusion 822 fits into the recess 812, thereby restricting the head cap 6 from moving along the vertical direction X1 with respect to the presser cap 7. As shown in FIG. 14, at the second position PC2, the protrusion 822 is located in the escape space S6 formed between the outer column surface 811 of the fitting column 81 and the inner hole surface 821 of the fitting hole 82, allowing the head cap 6 to move in the vertical direction X1 with respect to the presser cap 7. The circumferential direction C0 is the direction around the presser motion path of the presser bar 2. When in use, the head cap 6 can be positioned at the first position PC1 relative to the press cap 7, and at this time, the protrusion 822 of the head cap 6 fits into the recess 812 of the press cap 7, and the head cap 6 cannot move along the vertical direction X1 relative to the press cap 7, and the head cap 6 is fixed in the vertical direction X1 relative to the press cap 7. That is, at least when there is no sufficient external force acting, the head cap 6 cannot move along the vertical direction X1 relative to the press cap 7. Therefore, the press bar 2 cannot press against the container body 20, that is, it is held at a predetermined position. By rotating the head cap 6 from the first position PC1 to the second position PC2 relative to the press cap 7, the protrusion 822 is positioned in the retreat space S6 formed between the outer circumferential surface 811 of the fitting column 81 and the inner hole surface 821 of the fitting hole 82, and the head cap 6 can move along the vertical direction X1 relative to the press cap 7, that is, the press bar 2 can flexibly press against the container body 20.

[0028] 13, the outer cylinder surface 811 of the fitting column 81 can have an arc cylinder surface 813 with the arc line as its directrix, and an escape cylinder surface 814 with a line recessed relative to the arc line as its directrix. The escape cylinder surface 814 can be connected to the arc cylinder surface 813, that is, the escape cylinder surface 814 is adjacent to the arc cylinder surface 813. The recess 812 may be provided on the arc cylinder surface 813. The directrix of the arc cylindrical surface 813 is an arc line, and the directrix of the bypass cylindrical surface 814 is a line concave with respect to the arc line. As described above, the directrix is ​​also a constant curve forming a cylindrical surface. That is, the line that is the directrix of the bypass cylindrical surface 814 may be any curve that is concave toward the central axis O1 with respect to the arc line, including a straight line. Any point of this curve may be close to the central axis O1 with respect to the arc line. In the illustrated embodiment, this line is a straight line, that is, the bypass cylindrical surface 814 is a plane. The inner hole surface 821 of the fitting hole 82 may be a cylindrical surface that fits the arc cylindrical surface 813 of the fitting column 81. That is, when the fitting column 81 is complemented as a perfect cylinder along the circular line on which the arc line of the arc cylindrical surface 813 is located, the fitting hole 82 may be a clearance fit with the cylinder, for example, the hole diameter of the fitting hole 82 may be within 1 mm larger than the diameter of the cylinder. In this way, the inner hole surface 821 of the fitting hole 82 can fit with the arc cylindrical surface 813 of the fitting column 81. Ignoring the protrusion 822, the fitting column 81 can fit properly within the fitting hole 82.

[0029] As shown in FIG. 14, at the second position PC2, the protrusion 822 can be positioned within an evacuation space S6 formed between the evacuation column surface 814 and the inner hole surface 821. The above installation achieves fitting and positioning by the arcuate cylindrical surface 813, whose directrix is ​​an arcuate line, and the fitting hole 82, and also forms an evacuation space S6 between the inner hole surface 821 and the evacuation cylindrical surface 814, whose directrix is ​​recessed relative to the arcuate line, so that the protrusion 822 can be accommodated without interfering with the movement of the head cap 6 relative to the presser cap 7 along the vertical direction X1. When the head cap 6 switches from the first position PC1 to the second position PC2 relative to the presser cap 7 in the circumferential direction C0, the head cap 6 may be configured to rotate directly from the first position PC1 to the second position PC2. When the head cap 6 switches from the first position PC1 to the second position PC2 relative to the presser cap 7, the head cap 6 may be configured to move in the vertical direction X1 relative to the presser cap 7 and then rotate. For example, in the illustrated embodiment, as described later, the head cap 6 moves upward along the vertical direction X1 relative to the presser cap 7 from the state in FIG. 15, rotates, and then moves downward along the vertical direction X1 until it reaches the state in FIG. 14.

[0030] As shown in Fig. 14, the outer column surface 811 of the fitting column 81 can have two arc column surfaces 813 symmetrically distributed with respect to the first symmetric line L1. The outer column surface 811 of the fitting column 81 can also have two retreat column surfaces 814 symmetrically distributed with respect to the second symmetric line L2. The first symmetric line L1 and the second symmetric line L2 can be perpendicular to each other. This allows the head cap 6 to rotate from the first position PC1 to the second position PC2 whether inverted or forward, making the operation more convenient. The two arcuate cylindrical surfaces 813 may each be provided with a recess 812. The recesses 812 of the two arcuate cylindrical surfaces 813 may be distributed symmetrically with respect to the first symmetric line L1. Furthermore, as shown in Fig. 15, the fitting hole 82 may be provided with two protrusions 822, and at the first position PC1, the two protrusions 822 can be fitted into the recesses 812 of the two arcuate cylindrical surfaces 813, respectively.

[0031] In the illustrated embodiment, the protrusion 822 may have elasticity, for example, made of plastic having a certain elasticity. Due to this elasticity, the protrusion 822 can come out of the recess 812 by a predetermined external force along the vertical direction X1, for example, the protrusion 822 can be released from the recess 812 by manually pulling the head cap 6 upward, for example, the predetermined external force may be within 10 N. Furthermore, as shown in FIG. 7, the recess 812 can also restrict the head cap 6 from moving in the circumferential direction relative to the press cap 7, for example, the recess 812 may be in the form of a depression. At this time, the head cap 6 is directly pulled manually to separate the protrusion 822 from the recess 812, and then the head cap 6 (presser bar 2) is rotated relative to the presser cap 7 to the position of the evacuation space S6 corresponding to the protrusion 822, and then the presser bar 2 can move freely up and down relative to the presser cap 7 together with the head cap 6.

[0032] In another embodiment, the recess 812 may be a groove extending in the circumferential direction C0 so that the protrusion 822 naturally leaves the recess when the head cap 6 rotates from the first position PC1 to the second position PC2. At this time, the head cap 6 (presser bar 2) can be rotated relative to the presser cap 7 so that the protrusion 822 leaves the recess 812 and reaches the retreat space S6. Thereafter, the presser bar 2 can freely move up and down relative to the presser cap 7 together with the head cap 6. In the illustrated embodiment, the press cap 7 may have a support 83. The matching post 81 may protrude from the tip of the support 83. The support 83 may have a screw hole 831. The matching post 81 has a column center hole 810. The screw hole 831 may communicate with the column center hole 810 and may have the center line of the column center hole 810 as its central axis (both are shown as O1). The press cap 7 may be screwed into the mouth 201 of the container body 20 through the screw hole 831. In addition, the press rod 2 may reach the inside of the container body 20 by passing through the column center hole 810 of the matching post 81 and the mouth 201 surrounded by the screw hole 831 of the press cap 7 in that order. The cover assembly has a simple structure, is compact, is easy to produce, and has low manufacturing costs, and can easily maintain the position of the presser bar and flexibly switch the presser. As an example, as shown in Fig. 1A, the head cap 6 can be pressed to the bottom together with the presser bar 2 and the built-in member 1 in advance. The state shown in Fig. 1A can be the initial packaging state of the container 100. At this time, the protrusion 822 of the head cap 6 can be fitted into the recess 812 of the presser cap 7, and the container 100 can be locked in the initial packaging state. When the user uses the head cap 6, the head cap 6 can be pulled upward until it reaches the state shown in Fig. 1B so that the elastic protrusion 822 undergoes a certain deformation and comes out of the recess 812. At this time, the head cap 6, the presser bar 2, and the built-in member 1 can all be in the highest position.

[0033] Next, the head cap 6 can be rotated together with the presser bar 2 and the built-in member 1, and this can be seen in Figures 5A, 5B to 5C. In this rotation process, the slider 131 of the built-in member 1 can be rotated from the tip of the vertical chute 331 to the circumferential chute 332 so as to hang down, and can be further moved beyond the protrusion 3321 of the circumferential chute 332 and locked between the side wall of the circumferential chute 332 and the protrusion 3321, and the built-in member 1 can be locked at this highest position. Then, after this rotation process, the head cap 6 and the presser bar 2 can be rotated to the position of the retracting space S6 corresponding to the protrusion 822 of the head cap 6 relative to the presser cap 7 and the container body 20. After the built-in member 1 is locked in the highest position, the protrusion 822 of the head cap 6 is located above the retreat space S6, so that the head cap 6 and the presser bar 2 can be freely pressed up and down against the presser cap 7 and the container body 20.

[0034] Although the present invention has been disclosed in the above preferred embodiment, it is not intended to limit the present invention, and those skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent changes and modifications made to the above embodiment based on the contents that do not deviate from the technical solution of the present invention and the technical essence of the present invention fall within the scope of protection defined in the claims of the present invention.

Claims

1. A pump assembly suitable for attachment to a container body, comprising a presser bar having a rod body, a connection portion bottom wall, a connection portion side wall, and a piston portion, the lower end of the rod body being connected to the connection portion bottom wall, the connection portion side wall protruding upward from the connection portion bottom wall, and the pump assembly being installed on the outer periphery of the rod body, the pump assembly further comprising a main housing and a built-in member; The main housing has a bottom housing, an inner cylinder housing, and an outer cylinder housing, the inner cylinder housing and the outer cylinder housing all protruding upward from the bottom housing, the inner cylinder housing enclosing a cylindrical cavity, the outer cylinder housing being positioned on the outer periphery of the inner cylinder housing to define an annular space between the inner cylinder housing and the outer cylinder housing, the bottom housing having a pump suction port in a middle portion surrounded by the inner cylinder housing, the pump suction port communicating with the container body, The built-in member has a top shell wall, an inner cylinder wall, and an outer cylinder wall, the inner cylinder wall and the outer cylinder wall all protrude downward from the top shell wall, the inner cylinder wall surrounds a through hole through which the rod body passes, and the outer cylinder wall is located on the outer periphery of the inner cylinder wall to define an annular cavity between the inner cylinder wall and the outer cylinder wall, the connecting portion bottom wall is provided in the cylindrical cavity, the connecting portion side wall is in slidable sealing contact with an inner wall surface of the inner cylinder housing, the piston portion is provided in the annular cavity, and is in slidable sealing contact with an outer wall surface of the inner cylinder wall and an inner wall surface of the outer cylinder wall, The built-in member is movably arranged in the outer tube housing from a low position to a high position, and in the low position, the outer tube wall of the built-in member is at least partially located within the annular space, and in the high position, the built-in member is lockable in the high position by a locking structure.

2. The pump assembly according to claim 1, characterized in that the outer tube wall and the outer tube housing are slidably fitted together by a slider sliding along a vertical chute, and the slider and the vertical chute are provided on a first side and a second side of the outer wall surface of the outer tube wall and the inner wall surface of the outer tube housing, respectively.

3. The pump assembly according to claim 2, characterized in that a circumferential chute is provided on the second side, the circumferential chute is connected to the vertical chute, and at the high position, the built-in member is locked in the high position by the slider sliding circumferentially into the circumferential chute, and the slide and the circumferential chute constitute the locking structure.

4. 4. The pump assembly according to claim 3, wherein the circumferential chute is provided with a protrusion having a side surface which gradually becomes higher from a proximal side to a distal side of the longitudinal chute in the circumferential direction.

5. The pump assembly according to claim 1, characterized in that a first of the inner wall surface of the inner cylinder wall and the outer circumferential surface of the rod body is provided with a vertically extending convex rib, and a second of the inner wall surface of the inner cylinder wall and the outer circumferential surface of the rod body is provided with a concave groove that slidably fits with the convex rib.

6. 3. The pump assembly according to claim 2, wherein the first side is an outer wall surface of the outer cylinder wall.

7. 3. The pump assembly of claim 2, wherein said pump assembly includes a circumferentially distributed plurality of said sliders and a corresponding plurality of said longitudinal chutes.

8. The pump assembly, when the built-in member is in the lower position, The bottom wall of the connection portion of the presser bar abuts against the bottom housing of the main housing, and a gap is formed between the lower end of the outer tube wall of the built-in member and the bottom housing in the vertical direction, and / or The piston portion of the presser bar abuts against the top shell wall of the built-in member and is located above the inner cylindrical housing of the main housing.

2. The pump assembly of claim 1, wherein the pump assembly is adapted to permit

9. The pump assembly, with the built-in member in the high position, The presser bar moves downward relative to the built-in member until it abuts against the bottom housing of the main housing, and the piston portion always comes into sealing contact with the outer wall surface of the inner cylinder wall and the inner wall surface of the outer cylinder wall, respectively; and / or The height difference between the lower ends of the inner and outer walls of the built-in member and the upper end of the inner housing of the main housing is less than 10% of the height of the outer housing.

2. The pump assembly of claim 1, wherein the pump assembly is adapted to permit

10. A container having a container body and a function of discharging contents, the container further comprising a pump assembly according to any one of claims 1 to 9, the pump assembly being attached to the container body and discharging contents within the container body.

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