Pump assembly

Abstract

According to an embodiment of the present application, a pump assembly is provided. The pump assembly includes a cylinder having an upper portion and a lower portion that are open, a hollow formed inside, a first wing portion protruding outward along an upper end outer peripheral surface, a seal portion having at least a portion inserted into the cylinder, sealing at least a portion of the upper portion of the cylinder, a second wing portion protruding outward along an upper end outer peripheral surface, a rod moving downward based on an external force, changing a pressure inside the cylinder, an elastic member between the rod and the seal portion, providing an elastic force from the seal portion to the rod, and a housing portion coupled to surround an upper end of the cylinder, detachably coupling the pump assembly to a container portion, wherein as the housing portion is coupled to the container portion, the first wing portion and the second wing portion are pressed downward by an inner surface of the housing portion, and are fixed to an upper end of the container portion.

Description

Technical Field

[0001] This invention relates to pump assemblies, and more particularly, to pump assemblies comprising environmentally friendly, flexible components. Background Technology

[0002] Generally speaking, a pump container discharges its contents to the outside through the pumping action of a pump assembly connected to the upper part of the container body. It consists of a container body that stores the contents, a pump assembly connected to the upper part of the container body that creates a vacuum inside the container body and lifts the contents through the pumping action, and a button located above the pump assembly that is raised and lowered by the user when pressurized and transmits pressure to the pump assembly.

[0003] The pump assembly performs a pumping action to expel the contents stored in the container body to the outside, including a spring that provides elastic force to the inside to repeat this pumping action. Typically, the spring is made of metal, which not only results in a high manufacturing cost, but also, because the pump assembly is made of both plastic and metal, requires separation and disposal for reuse, thus posing a disadvantage for recycling. Summary of the Invention

[0004] The problem the invention aims to solve

[0005] The present invention is proposed to solve the aforementioned problems, and its purpose is to provide a pump assembly including an environmentally friendly elastic member that improves the bonding force between the members.

[0006] The technical problems of the present invention are not limited to those mentioned above. Other technical problems not mentioned can be clearly understood by those skilled in the art through the following description.

[0007] means for solving problems

[0008] According to an embodiment of the present invention, a pump assembly is provided. The pump assembly includes: a cylinder, the upper and lower parts of which are open, and the interior forming a hollow space, with a first wing protruding outward along the outer peripheral surface of the upper end; a sealing portion, at least a portion of which is inserted into the cylinder to seal at least a portion of the upper part of the cylinder, with a second wing protruding outward along the outer peripheral surface of the upper end; a rod that moves downward based on an external force to change the pressure inside the cylinder; an elastic member located between the rod and the sealing portion, providing an elastic force from the sealing portion to the rod; and a housing portion for surrounding the upper end of the cylinder, detachably connecting the pump assembly to a container portion, wherein, as the housing portion is connected to the container portion, the first wing and the second wing are pressurized downward by the inner surface of the housing portion and fixed to the upper end of the container portion.

[0009] Furthermore, a mounting groove is formed around the inner side of the upper end of the cylinder, and at least a portion of the second wing is accommodated in the mounting groove so that the upper surface of the first wing is aligned with the upper surface of the second wing.

[0010] Furthermore, the housing portion includes: a receiving portion, the upper and lower portions of which are open and the interior is hollow, for receiving at least a portion of the rod and the elastic member; a sidewall portion, spaced outward from the receiving portion, forming a joint portion that engages with the container portion along its inner circumferential surface; and a connecting portion, extending outward from the outer circumferential surface of the receiving portion, connecting the sidewall portion and the receiving portion, wherein the receiving portion is inserted into the inner side of the sealing portion at a predetermined depth, thereby engaging the housing portion and the sealing portion.

[0011] Furthermore, the first edge portion protrudes upward from the inner lower part of the sealing portion, and a first engaging protrusion is formed on the outer peripheral surface of the first edge portion. A second engaging protrusion is formed on the inner peripheral surface of the lower end of the receiving portion. As the receiving portion is inserted, the first engaging protrusion is fastened to the second engaging protrusion.

[0012] Furthermore, on the lower inner surface of the sealing portion, facing outward from the first edge portion, at least one first air inlet / outlet hole is formed that communicates with the interior of the cylinder.

[0013] Furthermore, the elastic member is a bellows type, with its sides sealed, and protrudes outward from the upper outer peripheral surface of the rod, forming a second edge portion for supporting the upper end of the elastic member. At least one second air inlet / outlet hole communicating with the open upper part of the elastic member is formed on the second edge portion.

[0014] Furthermore, at the second edge portion, a lower extension portion for limiting the outer deformation of the upper end of the elastic member protrudes downward from around the second edge portion.

[0015] Furthermore, the receiving portion extends upward at a height corresponding to the second edge portion, so that the elastic member is received inside without being exposed to the outside.

[0016] Furthermore, the material of the elastic member may include at least one of the following: polyetheretherketone (PEEK), polycarbonate (PC), polyoxymethylene (POM), polyketone (POK), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), polyoxypropylene (POP), polyolefin elastomer (POE), and ethylene octene / butene copolymers.

[0017] Invention Effects

[0018] According to the present invention, the elastic component is made of soft plastic, which saves costs through a simple structure, solves the problem of separation and disposal of components from other pump assemblies, and is environmentally friendly.

[0019] Furthermore, according to the present invention, the wings formed on the cylinder and the sealing part are simultaneously pressurized and fixed by the housing part to prevent the components from separating and to more stably connect the pump assembly to the container.

[0020] Furthermore, according to the present invention, the receiving portion of the housing portion is pressed against the inner surface of the sealing portion and inserted into the lower inner end of the sealing portion to improve the bonding force between the two.

[0021] Furthermore, according to the present invention, the housing portion prevents the elastic member from being exposed to the outside, and prevents damage to the elastic member during the storage of the pump assembly and the assembly of the container. Attached Figure Description

[0022] To provide a fuller understanding of the accompanying drawings referenced in this specification, a brief description of each drawing is provided.

[0023] Figure 1 A perspective view of a pump assembly according to an embodiment of the present invention is shown.

[0024] Figure 2 A cross-sectional view of a pump assembly according to an embodiment of the present invention is shown.

[0025] Figure 3 The cylinder of the pump assembly shown is illustrated in an embodiment of the present invention.

[0026] Figure 4 The sealing portion of the pump assembly according to an embodiment of the present invention is shown.

[0027] Figure 5 The rod of the pump assembly according to an embodiment of the present invention is shown.

[0028] Figure 6 The elastic member of the pump assembly shown is illustrated in an embodiment of the present invention.

[0029] Figure 7 The housing portion of the pump assembly according to an embodiment of the present invention is shown.

[0030] Figure 8 A cross-sectional view of the contents container according to an embodiment of the present invention is shown. Detailed Implementation

[0031] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Furthermore, the structure and usage method of the apparatus according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. Identical reference numerals or symbols in the various drawings indicate components or parts that perform substantially the same function. For ease of description, the vertical and horizontal directions are based on the accompanying drawings, and the scope of the present invention is not limited to the scope of the present invention.

[0032] The terms "first," "second," etc., which include ordinal numbers, can be used to describe various components, but the components are not limited by these terms. These terms are only used to distinguish one component from another. For example, without departing from the scope of the invention, a first component may be named a second component, and similarly, a second component may be named a first component. Terms and / or include combinations of multiple related items or one of multiple related items.

[0033] The terminology used in this specification is for the purpose of illustrating embodiments and is not intended to limit or restrict the invention. Unless there is a clear difference in meaning, singular expressions include plural expressions. In this specification, terms such as include or have indicate the presence of a feature, number, step, action, component, part, or combination thereof described in the specification, rather than precluding the possibility of the presence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0034] Throughout this specification, the connection between a part and other parts includes not only direct connections but also electrical connections via other components. Furthermore, unless specifically stated to the contrary, the inclusion of a component in a part does not exclude other components, but rather may include them.

[0035] Figure 1 A perspective view of a pump assembly according to an embodiment of the present invention is shown. Figure 2 A cross-sectional view of a pump assembly according to an embodiment of the present invention is shown. Figure 3 The cylinder of the pump assembly shown in the embodiment of the present invention is shown. Figure 4 The sealing portion of the pump assembly according to an embodiment of the present invention is shown. Figure 5 The rod of the pump assembly shown in an embodiment of the present invention is shown. Figure 6 The elastic member of the pump assembly shown in the embodiment of the present invention is shown. Figure 7 The housing portion of the pump assembly according to an embodiment of the present invention is shown.

[0036] Reference Figures 1 to 7 The pump assembly 100 is subjected to external force from the user, causing internal pressure changes for the inflow and outflow of contents. Specifically, it may include a cylinder 110, a sealing cap 120, a piston rod 130, a sealing part 140, a rod 150, an elastic member 160, and a housing part 170.

[0037] The upper and lower parts of the cylinder 110 are open, and the interior is hollow, providing space for the inflow and outflow of the contents. The cylinder 110 may be located inside the upper end (especially the nozzle) of the container section (not shown in the figures), forming a first wing 111 outward, and is disposed at the upper end of the container section. For example, the first wing 111 may be formed protruding outward along the outer peripheral surface of the upper end of the cylinder 110, and when the cylinder 110 is inserted into the inside of the container section through the open nozzle, it may be disposed on the upper end face of the nozzle.

[0038] At the upper end of the cylinder 110, a recessed mounting groove 112 may be formed for mounting (or accommodating) the second wing 141 of the sealing portion 140. The mounting groove 112 is recessed around the inner side of the upper end of the cylinder 110 and may have an annular shape corresponding to the second wing 141. In an embodiment, this mounting groove 112 may be formed by extending from the inner circumferential surface of the cylinder 110 across a region of the first wing 111.

[0039] The lower end of cylinder 110 can extend toward the interior of the container and form an inlet communicating with the container. A valve can be formed at or adjacent to the inlet. The valve is a backflow prevention valve; when the internal pressure of cylinder 110 is positive, the inlet is closed; when the internal pressure of cylinder 110 becomes negative, the inlet can be opened.

[0040] The sealing cap 120 is used to open and close the piston rod 130. Its outer surface can be tightly attached to the inner surface of the cylinder 110, and its inner surface can be tightly attached to the piston rod 130. The lower end of the inner surface of the sealing cap 120 can be tightly attached to the pad of the piston rod 130, sealing the inlet of the piston rod 130. With the sealing cap 120 as a reference, when the piston rod 130 descends, the lower end of the sealing cap 120 can move away from the pad of the piston rod 130 and open the inlet, communicating with the interior of the cylinder 110.

[0041] The piston rod 130 is located inside the cylinder 110, its lower side is surrounded by a sealing cap 120, and its upper side can be connected to the rod 150. The piston rod 130 has a hollow tube shape, with an inlet formed on the lower side of the piston rod 130 that is opened and closed by the sealing cap 120, and an outlet formed on the upper side of the piston rod 130 for the internal contents flowing in through the inlet to flow out. Furthermore, a pad can be formed at the lower end of the piston rod 130, and when the lower end of the inner surface of the sealing cap 120 is pressed against the pad, the inlet is sealed within the internal space of the cylinder 110.

[0042] The piston rod 130 can move vertically within the cylinder 110 based on the rod 150. When the piston rod 130 moves downward, the lower end of the inner surface of the sealing cap 120 is separated from the gasket, opening the inlet, allowing the contents inside the cylinder 110 to flow into the piston rod 130. As the piston rod 130 continues to move, the contents are discharged through the outlet and can then pass through the rod 150 and be ejected through the nozzle's discharge orifice. When the piston rod 130 moves upward, the cylinder 110 can close the inlet of the piston rod 130, creating a negative pressure inside the cylinder 110, allowing the contents inside the container to flow into the cylinder 110.

[0043] At least a portion of the sealing portion 140 can be inserted into the cylinder 110 and engaged with the upper end of the cylinder 110, sealing at least a portion of the upper part of the cylinder 110. For example, the sealing portion 140 may include a sidewall that adheres to the inner surface of the cylinder 110 and a base formed from the lower end of the sidewall inward. The bottom surface of the base (or a protrusion formed on the bottom surface of the base) can suppress the rise of the sealing cap 120.

[0044] At the upper end of the sealing portion 140, a second wing 141 may be formed along its outer peripheral surface. For example, the second wing 141 may be formed protruding outward from the upper outer peripheral surface of the sidewall. When the sealing portion 140 is engaged with the cylinder 110, the second wing 141 is exposed to the outside of the cylinder 110 and can be accommodated in the mounting groove 112 formed at the upper end of the cylinder 110. The second wing 141 is accommodated in the mounting groove 112 such that the upper surface of the second wing 141 and the upper surface of the first wing 111 of the cylinder 110 can be aligned at the same height. For this purpose, the second wing 141 may have a thickness corresponding to the depth of the recess in the vertical direction of the mounting groove 112.

[0045] The lower inner surface of the sealing portion 140 may form a through portion 142 and a first edge portion 143. For example, the through portion 142 may be formed at the center of the base. Through this through portion 142, the rod 150 and the piston rod 130 can be engaged with each other. Furthermore, for example, the first edge portion 143 surrounds the through portion 142 and protrudes upward and to the side from the top of the base portion by a predetermined length. The lower end of the elastic member 160 is provided between the through portion 142 and the first edge portion 143, and the lower end of the elastic member 160 can be supported by the top of the base portion. At this time, the first edge portion 143 can prevent the elastic member 160 from detaching outward, and serves to prevent the lower end of the elastic member 160 from deforming excessively outward due to use. The outer peripheral surface of the first edge portion 143 may form at least one first engagement protrusion 144 for engagement with the housing portion 170.

[0046] In this embodiment, at least one first air inlet hole 145 may also be formed on the lower inner surface of the sealing portion 140. For example, the first air inlet hole 145 may be formed on the outer side of the first edge portion 143, penetrating through the base. The first air inlet hole 145 may communicate with the interior of the cylinder 110, allowing air to enter and exit the upper space of the sealing cap 120.

[0047] In this embodiment, at least one engagement protrusion 146 may be formed on the outer peripheral surface of the sealing portion 140. For example, the engagement protrusion 146 may be formed to protrude outward from the sidewall. Based on this engagement protrusion 146, a robust connection between the sealing portion 140 and the cylinder 110 can be achieved, more tightly sealing the upper part of the cylinder 110. According to this embodiment, an engagement groove corresponding to the engagement protrusion 146 may be formed on the inner peripheral surface of the cylinder 110.

[0048] Rod 150 can be attached to piston rod 130 and move up and down together with piston rod 130. For example, rod 150 can be lowered by an external force applied through a nozzle or the like, causing piston rod 130 to fall, and when the external force is removed, it can rise, causing piston rod 130 to rise. By raising and lowering rod 150 in this way, the internal pressure of cylinder 110 can be changed.

[0049] The rod 150 may include a main body portion 151 and a second edge portion 152.

[0050] The lower end of the main body 151 is connected to the piston rod 130 and is formed in a continuous manner from top to bottom, so that the contents flowing in from the piston rod 130 can be moved to the upper side through the main body 151.

[0051] The second edge portion 152 can be formed by protruding outward from the upper outer periphery of the main body portion 151. The upper end of the elastic member 160 can be supported by the bottom surface of the second edge portion 152. The length of the receiving space for the elastic member 160 can be defined based on the length from the bottom surface of the second edge portion 152 to the top of the base of the sealing portion 140. In this case, the length from the bottom surface of the second edge portion 152 to the top of the base of the sealing portion 140 can be shorter than the length of the elastic member 160. That is, the length of the elastic member 160 can be compressed to a length shorter than its stable state and accommodated within the pump assembly 100.

[0052] In this embodiment, a lower extension 152-1 may be formed on the outer side of the second edge portion 152. For example, the lower extension 152-1 may be formed protruding downward from the periphery of the second edge portion 152 for a predetermined length. Based on the lower extension 152-1, while preventing the elastic member 160 from disengaging, excessive outer deformation of the upper end of the elastic member 160 caused by the use of the pump assembly 100 can be limited.

[0053] In this embodiment, at least one second air inlet / outlet hole 152-2 is formed on the second edge portion 152. For example, the second air inlet / outlet hole 152-2 may extend through the second edge portion 152 in a vertical direction. When the elastic member 160 is a bellows type, the second air inlet / outlet hole 152-2 communicates with the open upper part of the elastic member 160, and the compression and expansion of the internal air generated when the elastic member 160 is compressed and decompressed can be eliminated through the second air inlet / outlet hole 152-2.

[0054] The elastic member 160 compresses and decompresses along its length, thereby providing elastic force. The elastic member 160 can use the elastic force to perform the pumping action of the pump assembly 100, which can draw in and expel contents through the pumping action.

[0055] The lower end of the elastic member 160 can be supported by the sealing portion 140 (e.g., the upper part of the base portion), and the upper end can be supported by the rod 150 (e.g., the second edge portion 152). When the user pressurizes the pump assembly 100 (especially the rod 150), the rod 150 can move downwards to compress the elastic member 160. At this time, the piston rod 130 coupled to the rod 150 can move downwards together. Furthermore, when the user releases the pressure, the elastic force of the elastic member 160 can cause the rod 150 to return to the upper side. At this time, the piston rod 130 coupled to the rod 150 can move upwards together.

[0056] In this embodiment, the elastic member 160 can be bellows-shaped, with closed sides and open top and bottom. Specifically, outwardly protruding ridges 161 and inwardly extending valleys 162 from the ridges 161 can be repeatedly formed along the length of the elastic member 160, thereby sealing the sides. Through this structure of ridges 161 and valleys 162, the sides of the elastic member 160 can bend and deform when pressure is applied to the rod 150.

[0057] In this embodiment, a support 163 may be formed at the upper and / or lower end of the elastic member 160. For example, a portion of the upper and / or lower end of the elastic member 160 may be bent inward to form the support 163. The support 163 may extend horizontally to a certain extent, thereby allowing the elastic member 160 to stably adhere to the bottom surface of the second edge portion 152 and / or the upper surface of the base portion of the sealing portion 140.

[0058] In this embodiment, the elastic member 160 may have a length greater than the stroke distance of the piston rod 130 of the pump assembly 100. This length is the length of the elastic member 160 in its steady state, without compression or elongation. For example, the length may be 1.4 to 3 times the stroke distance of the piston rod 130, but is not limited to this. The length can be set in various ways depending on the material, shape, etc., of the elastic member 160. That is, the length of the elastic member 160 should take into account the deformation after repeated compression, so that the compression distance of the deformed elastic member 160 corresponds to or is close to the stroke distance of the piston rod 130.

[0059] In this embodiment, the elastic member 160 can be accommodated within the pump assembly 100 in a partially compressed state. For this purpose, the elastic member 160 can have a length longer than the accommodating space of the pump assembly 100 (e.g., the space between the rod 150 and the seal 140). For example, the elastic member 160 can have a length that is 1.3 to 3 times or 1.7 to 2.2 times longer than the respective accommodating spaces, but is not limited thereto. As described above, since a portion of the elastic member 160 is compressed and accommodated within the pump assembly 100, even if the elastic member 160 experiences a decrease in its resilience and deformation due to repeated compression, the size of the accommodating space accommodating the elastic member 160 does not need to be changed, and the elastic member 160 can be stably positioned.

[0060] In this embodiment, at least a portion of the elastic member 160 is made of a soft plastic material. For example, it may include polyetheretherketone (PEEK), polycarbonate (PC), polyoxymethylene (POM), polyketone (POK), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), polyoxypropylene (POP), elastomers, polyolefin elastomers (POE), copolymers, ethylene octene / butene copolymers, etc. However, it is not limited to these. Using such a soft plastic material makes the elastic member 160 easier to manufacture and saves production costs compared to traditional metal springs. Furthermore, it solves the problem of separation and disposal from other components of the pump assembly 100, making it environmentally friendly.

[0061] In this embodiment, the elastic component can be manufactured by injection molding. Therefore, compared to methods such as blow molding, it can provide more stable performance.

[0062] However, the shape and structure of the elastic member 160 are exemplary and various shapes and structures may be adopted according to applicable embodiments of the present invention.

[0063] The housing portion 170 is coupled to surround the upper end of the cylinder 110, and the pump assembly 100 can be detachably coupled to the upper end of the container portion (e.g., the nozzle).

[0064] The housing portion 170 may include receiving portions 171-1, 2, sidewall portion 172, and connecting portion 173 connecting them. The upper and lower portions of the receiving portions 171-1, 2 are open, and the interior is hollow, so that at least a portion of the rod 150 and the elastic member 160 can be received inside. Furthermore, the sidewall portion 172 is connected to the receiving portions 171-1, 2 via the connecting portion 173, and is spaced outward from the receiving portions 171-1, 2. The inner circumferential surface forms a joint (e.g., a screw joint), which can be detachably connected to the container portion.

[0065] In the embodiment, the receiving portions 171-1 and 171-2 may be composed of a first receiving portion 171-1 located on the upper side with the connecting portion 173 as the center and a second receiving portion 171-2 located on the lower side.

[0066] The first receiving portion 171-1 can extend upward to a height corresponding to the second edge portion 152 of the rod 150. Accordingly, the elastic member 160 is not exposed to the outside and is completely contained inside the receiving portions 171-1, 2, which can prevent damage to the elastic member 160 during the storage of the pump assembly 100 or the assembly process of the container portion.

[0067] The second receiving portion 171-2 can be inserted into the inside of the sealing portion 140 and pressed against the inner surface of the sealing portion 140. The housing portion 170 can be joined to the sealing portion 140 through the second receiving portion 171-2. For this purpose, a second engaging protrusion 174 can be formed along the lower inner circumferential surface of the second receiving portion 171-2. That is, as the second receiving portion 171-2 is inserted into the inside of the sealing portion 140, the second engaging protrusion 174 is fastened to the first engaging protrusion 144 formed on the first edge portion 143 of the sealing portion 140, thereby enabling the housing portion 170 to be joined to the sealing portion 140.

[0068] In this embodiment, the housing portion 170 simultaneously presses inwards onto the first wing 111 of the cylinder 110 and the second wing 141 of the sealing portion 140, thereby securing them to the upper end of the container portion. For example, the housing portion 170 is screwed to the upper end of the container portion, and the bottom surface of the connecting portion 173 simultaneously presses downwards onto the top surfaces of the first wing 111 and the second wing 141, thereby securing the first wing 111 and the second wing 141 between the upper end of the container portion and the housing portion 170.

[0069] Figure 8 A cross-sectional view of the contents container according to an embodiment of the present invention is shown.

[0070] Reference Figure 8 The contents container may include a pump assembly 100, a container section 200, and a nozzle 300.

[0071] The container section 200 provides a space for containing the contents. The contents contained in the container section 200 are dispensed externally through a nozzle 300 or the like, so that the user can use them. For example, the contents may be cosmetics (i.e., cosmetic ingredients) or pharmaceuticals, but are not limited to these; they may include substances of various types or components contained in the container section 200 and dispensed through the nozzle 300. The dosage form of the contents may be liquid, gel, powder, etc. Furthermore, although the accompanying drawings show the container section 200 as a bottle type, this is merely exemplary, and various types of container sections 200, such as tubes or totes, may be used.

[0072] A pump assembly 100 (e.g., the first wing 111 of cylinder 110) can be mounted on the upper end of the container portion 200. The contents contained in the container portion 200 can be ejected to the outside via the pump assembly 100. A housing portion 170 of the pump assembly 100 can be attached to the outside of the nozzle of the container portion 200. With the container portion 200 attached to the housing portion 170, the housing portion 170 can pressurize and secure the first wing 111 of cylinder 110 and the second wing 141 of the sealing portion 140.

[0073] The nozzle 300 is subjected to external force from the user, which is transmitted to the pump assembly 100, allowing the contents expelled from the pump assembly 100 to be discharged to the outside. The upper side of the nozzle 300 is subjected to external force from the user, enabling it to move up and down, while the lower side can engage with the piston rod 130. The raising and lowering of the nozzle 300 causes the piston rod 130 to rise and fall.

[0074] As described above, multiple embodiments have been described with reference to specific examples and accompanying drawings. However, those skilled in the art can implement various modifications and variations based on the description. Furthermore, the various embodiments can be combined with each other as needed. Therefore, other specific embodiments, other examples, and equivalents to the claims are all within the scope of the claims of this invention.

Claims

1. A pump assembly, characterized in that, include: The cylinder is open at the top and bottom, forming a hollow interior, with the first wing protruding outward along the outer circumference of the upper end; The sealing part, at least a portion of which is inserted into the cylinder, seals at least a portion of the upper part of the cylinder, and the second wing protrudes outward along the outer peripheral surface of the upper end; The lever moves downwards due to an external force, changing the pressure inside the cylinder; An elastic member is located between the rod and the sealing portion, providing an elastic force from the sealing portion to the rod; and The housing portion, which surrounds the upper end of the cylinder, is joined to the container portion, and the pump assembly is detachably joined to the container portion. As the shell portion is joined to the container portion, the first wing and the second wing are pressed downwards by the inner surface of the shell portion and fixed to the upper end of the container portion. The housing portion includes: The receiving portion is open at the top and bottom, and hollow inside, to receive at least a portion of the rod and the elastic member; A sidewall portion, spaced outward from the receiving portion, forms a joint portion that joins the container portion along its inner circumferential surface; and The connecting portion extends outward from the outer periphery of the receiving portion, connecting the sidewall portion and the receiving portion. The receiving portion is composed of a first receiving portion located on the upper side with the connecting portion as the center and a second receiving portion located on the lower side. The second receiving portion is inserted into the inside of the sealing portion at a predetermined depth, thereby combining the housing portion and the sealing portion.

2. The pump assembly according to claim 1, characterized in that, At the upper end of the cylinder, a mounting groove is formed along the inner periphery, and at least a portion of the second wing is received into the mounting groove so that the upper surface of the first wing is aligned with the upper surface of the second wing.

3. The pump assembly according to claim 1, characterized in that, The first edge portion protrudes upward from the inner lower part of the sealing portion, and a first engaging protrusion is formed on the outer peripheral surface of the first edge portion. A second engaging protrusion is formed on the lower inner peripheral surface of the second receiving portion. As the second receiving portion is inserted, the first engaging protrusion is fastened to the second engaging protrusion.

4. The pump assembly according to claim 3, characterized in that, On the lower inner surface of the sealing portion, facing outward from the first edge portion, at least one first air inlet / outlet hole is formed that communicates with the interior of the cylinder.

5. The pump assembly according to claim 1, characterized in that, The elastic member is a bellows type, sealed on the side, and protrudes outward from the upper outer peripheral surface of the rod, forming a second edge portion for supporting the upper end of the elastic member. At least one second air inlet / outlet hole is formed on the second edge portion, communicating with the open upper part of the elastic member.

6. The pump assembly according to claim 5, characterized in that, At the second edge, a lower extension for limiting the outer deformation of the upper end of the elastic member protrudes downward from around the second edge.

7. The pump assembly according to claim 5, characterized in that, The first receiving portion extends upward at a height corresponding to the second edge portion, thereby receiving the elastic member inside the receiving portion in a manner that prevents the elastic member from being exposed to the outside.

8. The pump assembly according to claim 5, characterized in that, The material of the elastic component may include at least one of the following: polyetheretherketone, polycarbonate, polyoxymethylene, polyketone, polybutylene terephthalate, polypropylene, polyethylene, polyoxypropylene, polyolefin elastomer and ethylene octene / butene polymer.

Images