Content discharge container

Abstract

A content discharge container according to an embodiment of the present invention comprises: a container body in which contents are accommodated; a pump assembly which is detachably coupled to the upper part of the container body and which pumps and discharges the contents contained in the container body by pressurization; and a piston provided inside the container body and moving upward according to the internal pressure of the container body to discharge the contents contained in the container body through a pump assembly, when the piston is moved to the uppermost end of the container body by the discharge of the contents, the piston is fastened to the lower portion of the pump assembly so that the pump assembly and the piston can be integrally separated from the container body. In addition, various embodiments understood by the specification may also be implemented.

Description

Technical Field

[0001] The present invention relates to a contents discharge container, and more specifically, when the contents are discharged, the piston and pump assembly inside the container body are integrally separated from the container body, thereby facilitating the separation of the discharged contents from the discharge container. Background Technology

[0002] The contents container has various structures depending on the dosage form and usage method of the contents it contains.

[0003] Recently, airless container structures that prevent air from entering the interior of the container have been widely used in various types of contents containers.

[0004] An airless container is a structure that uses the air pressure inside the container to lift and discharge the contents contained inside the container. A piston inside the container lifts and discharges the contents through a vacuum effect.

[0005] This airless container maintains a vacuum inside, preventing the contents from contacting air and thus preventing spoilage, thereby preserving the efficacy of the contents for a longer period. Furthermore, because the contents are expelled as a piston rises inside the container, it has the advantage of removing all contents without residue.

[0006] However, when the contents of the gas-free container, as described above, are depleted and need to be replenished, the pump assembly attached to the container body needs to be separated and used in conjunction with a new replenishment container. However, if the piston remains inside the depleted container body and its material is different from that of the container body, it is inconvenient for the user to manually separate the piston from the container body.

[0007] Therefore, there is a need to develop an environmentally friendly, gasless container that can easily separate the discharge piston from the container body after the contents inside the container body are exhausted. Summary of the Invention

[0008] The problem the invention aims to solve The present invention is intended to solve the aforementioned problem. One embodiment of the present invention provides a contents discharge container in which, when the contents inside the container body are completely exhausted and the piston moves to the uppermost part of the container body, the piston is secured to the lower part of the pump assembly, thereby allowing the pump assembly and the piston to be separated integrally from the container body.

[0009] The technical problems to be solved in this specification are not limited to those mentioned above. Those skilled in the art can clearly understand other technical problems not mentioned from the following description.

[0010] means for solving problems As a technical means to achieve the above-mentioned technical problems, a contents discharge container according to an embodiment of the present invention may include: a container body containing contents inside; a pump assembly detachably attached to the upper part of the container body, which pumps and discharges the contents contained in the container body by pressurization; and a piston disposed inside the container body and moving upward according to the internal pressure of the container body, so that the contents contained in the container body are discharged through the pump assembly.

[0011] Invention Effects According to one embodiment of the present invention, the contents discharge container of the present invention has the following effect: when the contents inside the container body are completely exhausted and the piston moves to the uppermost end of the container body, the piston is secured to the lower part of the pump assembly, thereby allowing the pump assembly and the piston to be integrally separated from the container body. Therefore, even if the piston is made of a different material than the container body, the user can conveniently discharge the container body without separating and removing the piston from the container body after the contents are exhausted.

[0012] In addition, since the piston engages with the pump assembly and separates from the container body when the contents are completely depleted, the user can easily detach the piston from the pump assembly and then fasten the pump assembly to a new refill container for use.

[0013] According to one embodiment of the present invention, the contents discharge container of the present invention can discharge all contents without any residue, and no residue is left on the container body. Therefore, it can be discharged separately without the need to clean the container body separately.

[0014] According to one embodiment of the present invention, the contents discharge container is made of the same series of materials, allowing for integrated discharge without the need to separate and discard components. Therefore, it has the advantages of easy recycling and environmental friendliness.

[0015] The effects achievable by this invention are not limited to those mentioned above, and those skilled in the art can clearly understand other effects not mentioned from the following description. Attached Figure Description

[0016] Figure 1 This is a perspective view showing a contents discharge container according to an embodiment of the present invention.

[0017] Figure 2 This is an exploded perspective view showing the contents discharge container of an embodiment of the present invention.

[0018] Figure 3 This is a perspective view showing the lower part of a pump assembly according to an embodiment of the present invention.

[0019] Figure 4This is an enlarged cross-sectional view showing the combined state of the housing and piston in an embodiment of the present invention.

[0020] Figure 5 This is an enlarged cross-sectional view showing an embodiment of the present invention, with an expanded portion formed in the container body and a curved portion formed in the piston.

[0021] Figure 6 These are cross-sectional views showing the usage state of the contents discharge container according to embodiments of the present invention.

[0022] In conjunction with the accompanying drawings, the same or similar constituent elements may use the same or similar reference numerals. Detailed Implementation

[0023] As a technical means to achieve the above-mentioned technical problems, a contents discharge container according to an embodiment of the present invention may include: a container body containing contents inside; a pump assembly detachably attached to the upper part of the container body, which pumps and discharges the contents contained in the container body by pressurization; and a piston disposed inside the container body and moving upward according to the internal pressure of the container body, so that the contents contained in the container body are discharged through the pump assembly.

[0024] According to an embodiment of the present invention, the piston joint is formed with one or more spaced spaces created by cutting at least one region, thereby allowing it to elastically deform inward when engaged with the piston.

[0025] According to an embodiment of the present invention, as the piston moves upward due to the discharge of contents, when it passes the expansion portion of the container body, the force acting on the bending portion weakens, thus allowing it to easily separate from the upper side of the container body.

[0026] The embodiments of the present invention will now be described in detail so that those skilled in the art can easily implement the invention with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein, but can be implemented in various different ways. Furthermore, for the sake of clear illustration in the drawings, parts unrelated to the description have been omitted, and similar reference numerals have been used for similar parts throughout the specification.

[0027] The terminology used in this invention has been selected as commonly used terms as possible, taking into account the functions mentioned in this disclosure. However, these terms may refer to various different terms depending on the intent of those skilled in the art, precedents, or the emergence of new technologies. Therefore, the terminology used in this invention should be interpreted based on its meaning and the overall content of the invention, and not merely on the name of the term.

[0028] Furthermore, while terms such as "first" and "second" can be used to describe various constituent elements, the constituent elements are not limited to those terms. These terms are only used to distinguish one component from another.

[0029] Throughout this specification, when a part is referred to as "connected" to another part, this includes not only "direct connection" but also "indirect connection" where another structure is intervening. Throughout this specification, when a part is described as "comprising" a structural element, unless otherwise stated, it implies that other structural elements may also be included, rather than excluding them. Furthermore, in the description of the constituent elements of embodiments of the present invention, terms such as first, second, A, B, A, (b), etc., may be used. These terms are only used to distinguish constituent elements from other constituent elements; the nature, order, or sequence of related constituent elements is not limited by these terms.

[0030] Throughout this disclosure, phrases such as "in one embodiment" appearing in various places do not necessarily refer to the same embodiment.

[0031] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0032] Figure 1 This is a perspective view showing a contents discharge container according to an embodiment of the present invention. Figure 2 This is an exploded perspective view showing the contents discharge container of an embodiment of the present invention.

[0033] Reference Figures 1 to 2 According to one embodiment, a contents discharge container 1000 may include: a container body 100 for containing contents A; a pump assembly 200 for discharging contents A contained in the container body 100; and a piston 300 disposed inside the container body 100, wherein the contents A contained in the container body 100 are discharged by the pump assembly 200.

[0034] For example, the aforementioned content A is a fluid in liquid or gel state, and may include cosmetic preparations, pharmaceutical contents, or external medical products such as toothpaste. For example, content A may include lotions, moisturizing lotions, nourishing lotions, toners, softening lotions, astringents, massage creams, nourishing creams, moisturizing creams, whitening essences, brightening creams, sunscreens, sunscreens, BB creams, makeup primers, foundations, CC creams, concealers, blushes, contour powders, eyeshadows, eyebrow pencils, eye creams, and makeup bases, but is not limited to these, and may include all types of substances that can be discharged through the pump assembly 200.

[0035] According to one embodiment, the container body 100 can be formed in the form of a cylindrical bottle, but is not limited thereto, and can also be formed in various forms such as a tube, a jar, a dispenser, a compact, etc.

[0036] According to one embodiment, the container body 100 can be made of plastic. For example, it can be made of polyethylene series or polypropylene series materials, specifically PET, PE, PP, PCR, PETG, etc. However, it is not limited to these; any material that can form the shape of the container body 100 and will not cause the contents A to deteriorate can be used. Therefore, the container body 100 can be recycled, thus providing an environmentally friendly contents discharge container 1000.

[0037] According to one embodiment, the upper part of the container body 100 may be combined with the pump assembly 200.

[0038] According to one embodiment, the pump assembly 200 can discharge contents A by applying pressure. For example, the pump assembly 200, when integrated with the container body 100, can discharge the contents A contained in the container body 100 to the outside.

[0039] The pump assembly 200 may include: a housing 210, which is partially housed and integrated into the interior of the container body 100; a pump 220, which moves the contents A inside the container body 100 by pressurizing and depressurizing; and a shoulder 230, which integrates and secures the housing 210 and the pump 220 to the container body 100.

[0040] The shell 210 can be joined in such a way that it is partially housed inside the upper part of the container body 100.

[0041] According to one embodiment, since a portion of the housing 210 is formed to be housed inside the container body 100, the piston 300, described later, can be coupled to a portion of the housing 210 housed in the container body 100 (in particular, the lower part of the housing).

[0042] This shell 210 can be attached to the container body 100 via a shoulder 230 that is attached to the upper part of the container body 100.

[0043] According to one embodiment, the shoulder 230 is formed with a thread corresponding to the thread formed on the upper outer side of the container body 100, and can be engaged with the container body 100 by means of the thread. The shoulder 230 and the container body 100 can be engaged by various means other than threaded engagement.

[0044] According to one embodiment, the shoulder 230 may have an inner accommodating space and an anti-detachment protrusion that can accommodate the housing 210.

[0045] Therefore, when the shoulder 230 is attached to the upper part of the container body 100, the shell 210 is accommodated inside the aforementioned accommodating space, and the anti-detachment boss contacts the upper part of the shell 210, so the shell 210 can be attached to the container body 100 through the shoulder 230.

[0046] According to one embodiment, the pump portion 220, described later, can be accommodated inside the accommodating space of the shoulder portion 230.

[0047] According to one embodiment, the shoulder portion 230 and the housing 210 may each be formed with a through hole. For example, a through hole may be formed in the central portion of the shoulder portion 230 and the housing 210, and the pump portion 220 of the pump assembly 200 may pass through the through holes of the housing 210 and the shoulder portion 230 and be exposed at the top.

[0048] That is, with this structure, the lower part of the pump section 220 is located inside the container body 100, and the upper part of the pump section 220 penetrates the shell 210 and the shoulder 230 and is exposed to the outside, thereby enabling the discharge of contents A.

[0049] As described above, the shoulder 230 can serve as a connecting member that can connect the housing 210 and the pump 220 to the container body 100.

[0050] According to one embodiment, the pump unit 220 can compress and decompress, and move the contents A. For example, the pump unit 220 may include: a cylinder, open at the top and bottom and hollow inside; a sealing part, at least a portion of which is inserted into the cylinder and at least partially seals the upper part of the cylinder; a sealing cap, which is in close contact with the cylinder inside the cylinder and moves up and down; a piston rod, surrounded by the sealing cap and moving up and down relative to the cylinder; a valve rod, which is coupled to the piston rod and moves up and down with the piston rod; and an elastic member disposed between the sealing part and the valve rod, providing an elastic force from the sealing part to the valve rod. However, it is not limited to this, and the pump unit 220 may have all known types of pump structures, such as airless type, dip tube type, spray type, etc.

[0051] According to an embodiment, the elastic member constituting the pump section 220 can be a bellows-type spring with alternating peaks and valleys and closed sides. In this case, the upper end of the valve stem can form a valve stem wing to support the upper end of the elastic member, and the outer end of the valve stem wing can form a downwardly curved portion to support the side of the elastic member. Additionally, a support groove can be formed on the upper surface of the sealing section, into which the lower end of the elastic member is inserted, and the support groove supports both the lower end and the side of the elastic member. Furthermore, at least one air passage can be formed in at least one of the valve stem wing and the sealing section to mitigate internal pressure changes during compression and decompression of the elastic member.

[0052] According to the embodiment, the pump section 220 as a whole can be made of the same or similar materials. For example, the pump section 220 as a whole can be made of plastic, excluding metal. In particular, the elastic members in the pump section 220 can also be made of plastic instead of metal. In this case, when the container body 100 is discarded, it is not necessary to discard only the pump section 220, thus improving the recycling rate and packaging reuse rate.

[0053] According to one embodiment, a piston 300 may be provided inside the container body 100. For example, the piston 300 is located at the bottom of the container body 100 containing the contents A, and the contents A is contained above the piston 300. The piston 300 rises under the vacuum generated by the pressurization and depressurization of the pump assembly 200. As the piston 300 rises, the contents A above the piston 300 can be discharged to the outside through the pump assembly 200.

[0054] According to one embodiment, the piston 300 may have a shape corresponding to the shape of the lower part of the housing 210. For example, the upper part of the piston 300 may be formed to correspond to the shape of the lower part of the housing 210 so as to be in close contact with the lower part of the housing 210. Therefore, when the piston 300 rises to its uppermost position inside the container body 100, it can be in close contact with and engage with the lower part of the housing 210.

[0055] The following is a detailed description of the method for integrating the piston 300 and the pump assembly 200.

[0056] According to one embodiment, the contents discharge container 1000 can be configured such that when all contents A inside the container body 100 are discharged, the pump assembly 200 and piston 300 engage, and the pump assembly 200 with piston 300 engaged is separated from the container body 100, thereby separating piston 300 from the container body 100 and discharging it. For example, as contents A are discharged, piston 300 gradually moves towards the upper end of container body 100. When all contents A are discharged and exhausted, piston 300 moves to the uppermost end of container body 100 and is secured to the lower part of pump assembly 200, thereby making pump assembly 200 and piston 300 a single unit. Then, when pump assembly 200 is separated from container body 100, it separates from container body 100 together with piston 300, thereby enabling easy separation of container body 100 and piston 300.

[0057] Therefore, even if the piston 300 is made of a different material than the container body 100, the user does not need to separate and remove the piston 300 from the container body 100 after the contents A are exhausted. Instead, the user separates the pump assembly 200, which is connected to the piston 300, from the container body 100, and then separates the piston 300 from the pump assembly 200, thereby enabling the piston 300 to be separated from the container body 100 and discharged. Therefore, this invention provides an environmentally friendly contents discharge container 1000.

[0058] Additionally, according to one embodiment, the pump assembly 200 and the piston 300 are made of the same series of materials. For example, when the pump assembly 200 is made of an olefin-based material, the piston 300 can also be made of the same olefin-based material as the pump assembly 200. Since the pump assembly 200 and the piston 300 are made of the same series of materials, the piston 300 can be separated and discharged together in the combined state without removing it from the pump assembly 200, thereby providing an environmentally friendly contents discharge container 1000 that facilitates easier separation and discharge.

[0059] Figure 3 This is a perspective view showing the lower part of a pump assembly according to an embodiment of the present invention.

[0060] Reference Figure 3 According to one embodiment, a piston coupling portion 211 may be formed extending from the lower part of the housing 210.

[0061] According to one embodiment, the piston joint 211 can be divided to form one or more spacers 213 in a portion thereof. For example, two spacers can be formed, but the number of spacers is not limited to this and can be configured in various ways. The piston joint 211 can be stretched in the inward and outward directions by the cut spacers.

[0062] According to one embodiment, the piston joint 211 may be configured to include a first joint and a second joint based on the space 213.

[0063] According to one embodiment, in the piston joint 211, when the piston 300 moves to the uppermost end of the container body 100 as the contents A inside the container body 100 are discharged, the piston 300 can engage with the piston joint 211. For example, when the piston 300, which has moved to the uppermost end of the container body 100, comes into close contact with the piston joint 211, the through portion 320 formed on the piston 300 applies pressure to the first and second joint portions of the piston joint 211. Under the pressure of the piston 300, the first and second joint portions elastically deform inward, so that the piston 300 can smoothly pass through the piston joint 211 and engage.

[0064] Figure 4This is an enlarged cross-sectional view showing the combined state of the housing and piston in an embodiment of the present invention.

[0065] Reference Figure 4 According to one embodiment, the piston engagement portion 211 may have one or more engagement protrusions 212 formed on its outer side.

[0066] According to one embodiment, the engagement protrusion 212 formed on the piston engagement portion 211 can prevent the piston 300 from disengaging from the piston engagement portion 211 when the piston 300 engages with the piston engagement portion 211 as the piston 300 rises. For example, the engagement protrusion 212 can be formed such that the diameter of the outer portion of the lower end of the piston engagement portion 211 is larger than the diameter of other portions of the piston engagement portion 211, or it can be formed into a raised, uneven structure, but it is not limited to this. As long as the structure can prevent the piston 300 from disengaging after the piston 300 engages with the piston engagement portion 211, it can be of any shape.

[0067] According to one embodiment, the diameter of the protrusion 212 can be formed to be larger than the diameter of the through portion 320 of the piston 300.

[0068] Therefore, after the piston 300 passes through the through portion 320 and is joined by the protrusion 212, the piston 300 is prevented from moving downward by the snap-fit ​​protrusion 321, which has a diameter larger than that of the through portion 320, thereby achieving a firm fastening between the piston 300 and the housing 210.

[0069] According to one embodiment, one or more snap-fit ​​protrusions 321 may be formed in a portion of the through portion 320 of the piston 300. For example, the snap-fit ​​protrusions 321 may be formed with the same shape as the engagement protrusions 212 of the piston engagement portion 211 described above.

[0070] That is, the diameter of a certain position inside the through portion 320 of the piston 300 can be made larger than the diameter of other parts, or it can be formed into a raised or recessed structure. However, it is not limited to this, as long as the structure can prevent the piston 300 from disengaging after the piston 300 is engaged with the piston joint portion 211, it can be of any shape.

[0071] Therefore, by combining the protrusion 212 with the snap-fit ​​protrusion 321, it is possible to prevent the piston joint 211 and the piston 300 from separating after they are engaged.

[0072] Figure 5 This is an enlarged cross-sectional view showing an embodiment of the present invention, with an expanded portion formed in the container body and a curved portion formed in the piston.

[0073] According to one embodiment, the piston 300 may have a curved portion 310 with its upper and lower ends bent outwards. For example, the curved portion 310 may be bent such that the upper and lower ends of the piston 300 have a certain slope (inclination) outwards.

[0074] According to one embodiment, when the piston 300 with the curved portion 310 is combined with the interior of the container body 100, the combination can be achieved by the bending portion 310 acting on the container body 100 with a bonding force. For example, when the container body 100 and the piston 300 are initially combined, the piston 300 is pushed into the lower part of the container body 100. At this time, the curved portion 310 of the piston 300, which is formed in a shape that bends outward and opens, deforms inward through elastic deformation. At this time, the curved portion 310 is in close contact with the inner wall of the container body 100 under the action of the circular restoring force generated by the elastic deformation, so that the piston 300 has a bonding force relative to the container body 100.

[0075] Therefore, when the piston 300 rises inside the container body 100 due to the discharge of contents A, the adhesive force can prevent contents A from detaching from the rear of the piston 300 inside the container body 100, so that contents A inside the container body 100 can be discharged completely without residue. Thus, the usability of the contents discharge container 1000 of the present invention is improved.

[0076] According to one embodiment, the container body 100 may have an expansion portion 110 whose inner diameter is larger than that of the lower portion. This expansion portion 110 may be formed at a location on the inner wall of the container body 100. For example, the upper portion of the container body 100 may have an expansion portion 110 that widens in the direction of the inner radial direction.

[0077] The expansion portion 110 can be formed at a location on the container body 100, and can also be formed such that the inner diameter gradually widens from a location on the container body 100 in the upward direction and the inner wall of the container body 100 has a certain inclination (slope). The shape of the expansion portion 110 can be realized in various forms.

[0078] According to one embodiment, the piston 300 can be easily detached from the outside of the container body 100 via the aforementioned expansion portion 110.

[0079] According to one embodiment, when the piston 300 moves upward due to the discharge of contents A and passes the expansion portion 110 of the container body 100, the adhesion force acting on the bend portion 310 can be released. For example, as described above, the piston 300 rises continuously while in close contact with the container body 100 via the bend portion 310, rising to the uppermost end of the container body 100. Simultaneously with engaging with the piston engagement portion 211, the bend portion 310 formed on the upper part of the piston 300 passes the expansion portion 110 of the container body 100, thereby releasing the adhesion force acting on the upper part of the piston 300.

[0080] That is, when the contents A are discharged and the piston 300 is engaged with the piston engagement 211, the bent portion 310 formed at the upper end of the piston 300 disengages from the upper side of the expansion portion 110 of the container body 100. Therefore, when the pump assembly 200 and the container body 100 are separated, the piston 300 also has a structure that allows it to be easily disengaged from the container body 100.

[0081] Therefore, as described above, the piston 300 can be easily detached from the container body 100 by means of the slope (in particular, the expansion portion 110 and the bending portion 310) structure formed on the container body 100 and the piston 300 respectively, thereby enabling the discharging of contents into the container 1000 to be separated.

[0082] Figure 6 These are cross-sectional views showing the usage state of the contents discharge container according to embodiments of the present invention.

[0083] Reference Figure 6 According to one embodiment, the user expels contents A by pressurizing the pump section 220 of the pump assembly 200 and uses the contents A contained in the container body 100.

[0084] When the contents A inside the container body 100 are completely discharged as the user uses it, the piston 300 rises to the top of the container body 100 and engages with the piston engagement portion 211 formed in the lower part of the shell 210.

[0085] As described above, when the contents A have been completely discharged and the piston 300 is engaged with the piston coupling 211, the user can disengage the threaded connection between the container body 100 and the pump assembly 200 by rotating the pump assembly 200 by a certain angle. Then, when the pump assembly 200 is separated from the container body 100, it is detached integrally from the container body 100 while the piston 300 is engaged with the pump assembly 200.

[0086] By applying external force, the piston 300, which is coupled to the pump assembly 200, is separated from the pump assembly 200, and then the pump assembly 200 is coupled to a new container body 100 that contains the contents A, thereby enabling replenishment.

[0087] The container body 100 of the separator pump assembly 200 can perform separation discharge for recycling in a clean state without residue.

[0088] As described above, preferred embodiments are disclosed in the accompanying drawings and specification. Specific terminology is used herein; however, this is for illustrative purposes only and is not intended to limit the meaning or scope of the invention as set forth in the claims. Therefore, it will be understood by those skilled in the art that various modifications and equivalent embodiments can be made therefrom. Consequently, the true scope of protection of this invention should be determined by the technical concept of the appended claims.

[0089] Explanation of reference numerals in the attached figures 1000: Contents discharge container 100: Container body 110: Expansion section 200: Pump assembly; 210: Housing 211: Piston joint 212: Joint protrusion 213: Separated space 220: Pump section 230: Shoulders 300: Piston; 310: Bend section 320: Through section; 321: Snap-fit ​​protrusion A: Contents.

Claims

1. A container for discharging contents, characterized in that, include: The container body, with its inner side holding the contents. A pump assembly, detachably attached to the upper part of the container body, pumps and discharges the contents contained within the container body by applying pressure. A piston is disposed inside the container body and moves upward according to the internal pressure of the container body to discharge the contents contained in the container body through the pump assembly; When the piston moves to the top of the container body as the contents are discharged, it is secured to the lower part of the pump assembly, allowing the pump assembly and piston to be detached integrally from the container body.

2. The contents discharge container according to claim 1, characterized in that, The pump assembly includes: A shell, at least a portion of which is housed and attached to the interior of the container body; A pump unit, coupled to the housing, moves the contents inside the container body by pressurizing and depressurizing; and The shoulder section connects and secures the housing and the pump section to the container body.

3. The contents discharge container according to claim 2, characterized in that, The housing includes a piston engagement portion extending downwards. When the piston moves to the uppermost end of the container body by discharging the contents, the piston engagement portion inserts into at least one region of the piston.

4. The contents discharge container according to claim 3, characterized in that, The piston joint has one or more spaced spaces formed by cutting at least one region. When engaged with the piston, the piston joint elastically deforms inward.

5. The contents discharge container according to claim 3, characterized in that, The piston has a shape corresponding to the shape of the lower part of the housing, and a through portion is formed in the center to engage with the piston joint.

6. The contents discharge container according to claim 5, characterized in that, The piston joint has one or more engagement protrusions. The through portion has one or more snap-fit ​​protrusions. When the piston engagement portion is inserted into the through portion, the snap-fit ​​protrusion is secured to the engagement protrusion.

7. The contents discharge container according to claim 1, characterized in that, The piston has curved portions at its upper and lower ends that bend outwards. When the piston is housed inside the container body, the curved portion deforms inward due to elastic deformation and is tightly integrated with the container body.

8. The contents discharge container according to claim 7, characterized in that, The inner wall of the container body is provided with an expansion portion whose inner diameter expands compared to the lower side.

9. The contents discharge container according to claim 8, characterized in that, As the piston moves upward due to the discharge of contents, the force acting on the curved portion weakens when the piston passes the expansion portion, thus easily separating it from the upper side of the container body.

10. The contents discharge container according to claim 1, characterized in that, The container body is made of plastic.

11. The contents discharge container according to claim 1, characterized in that, The piston and the pump assembly are made of the same series of materials.

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