Airless container with inner and outer container separation structure with improved central support function

Abstract

The present invention relates to an airless container with a separable inner and outer container. According to one embodiment, the airless container with a separable inner and outer container comprises an outer container and an inner container inserted into the inner side of the outer container to store contents, which is separated and discharged from the inside of the outer container after use of the contents. Before the inner container is separated and discharged from the outer container, the center of the bottom of the outer container and the center of the bottom of the inner container may be joined so as to be fixed to each other.

Description

Technology Field

[0001] The present invention relates to an airless container with an improved center support function and, more specifically, provides an airless container with an improved center support function that supports the center of the container so that the bottom of the inner container and the bottom of the outer container are separated from each other and the center of the container is not disrupted until all the contents are used. Background Technology

[0002] The following description is provided solely for the purpose of providing background information related to embodiments of the present invention, and the described content does not automatically constitute prior art.

[0003] An airless container is constructed with a structure having a predetermined internal receiving space that is sealed from the outside.

[0004] Airless containers can be used to store various types of viscous liquid contents, such as cosmetics, pharmaceuticals, and food products.

[0005] In the case of most existing airless containers, it is common for the entire container to be discarded after the contents have been completely used.

[0006] Recently, in response to various environmental issues, efforts are being made to dispose of used airless containers by separating reusable materials for recycling and separating only the minimum amount of material that came into direct contact with the contents.

[0007] As a prior art related to the present invention, Korean Registered Patent No. 10-2532114 discloses an airless type packaging container that is easy to manufacture and dispose of. Prior art literature

[0008] Republic of Korea Registered Patent No. 10-2532114 The problem to be solved

[0009] The objective of the present invention is to provide an airless container with an improved center support function that supports the center of the container so that the bottom of the inner container and the bottom of the outer container are separated from each other and the center of the container is not disrupted until all the contents are used.

[0010] The objects of the present invention are not limited to those mentioned above, and other unmentioned objects and advantages of the present invention may be understood from the following description and will be more clearly understood by the embodiments of the present invention. Furthermore, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims. means of solving the problem

[0011] According to one aspect of the present invention for achieving the above-mentioned objective, an airless container with an improved center support function is provided, which utilizes a structure that partially fixes the center of the bottom of the inner container and the center of the bottom of the outer container until the contents are completely used and the inner container is separated and discharged from the outer container, thereby preventing the bottom of the inner container and the bottom of the outer container from separating from each other until the contents are completely used and preventing the bottom centers of each inner and outer container from becoming dislodged, so that the center of the entire container can be easily maintained while the contents are being used, thereby enhancing both the appearance and the convenience of use.

[0012] An airless container with an improved center support function, according to one embodiment, comprises: an outer container; and an inner container inserted into the inner side of the outer container to store contents, which is separated and discharged from the inside of the outer container after use of the contents and is disposed of; wherein, prior to the separation and discharge of the inner container from the outer container, the center of the bottom of the outer container and the center of the bottom of the inner container may be joined so as to be fixed to each other.

[0013] According to one embodiment, an outer container hole is provided at the center of the bottom portion of the outer container, and an inner container projection is provided at the center of the bottom portion of the inner container, protruding downward and inserted and fixed into the outer container hole. Before the inner container is separated and discharged from the outer container, the inner container projection is maintained in a state where it is inserted into the outer container hole. When the inner container is separated and discharged from the outer container, the inner container is discharged from the outer container by an external force, and the inner container projection inserted into the outer container hole can be forcibly separated.

[0014] According to one embodiment, a first round shape portion is provided at the center of the bottom portion of the outer container, which is formed convexly upward compared to the remaining area of ​​the bottom portion of the outer container, and the outer container hole is a circular hole penetrating the center of the first round shape portion; a second round shape portion is provided at the center of the bottom portion of the inner container, which is formed convexly upward compared to the remaining area of ​​the bottom portion of the inner container and is in close contact with the first round shape portion without a gap, and the inner container protrusion may be a circular protrusion protruding from the center of the second round shape portion toward the outer container hole.

[0015] According to a preferred embodiment, a catch groove is formed on the outer side of the outer container hole, and the inner container projection is provided at the tip portion in the protruding direction and further provided with a stopper having an expanded diameter compared to the outer container hole. When the inner container projection is inserted into the outer container hole, the stopper provided at the tip portion of the inner container projection unfolds into the catch groove and is secured by catch, thereby preventing the inner container projection from accidentally detaching. The stopper may be formed in a flexible shape.

[0016] In addition, according to a preferred embodiment, the inner container protrusion may have a wedge shape in which the diameter gradually increases as it moves up and down. Accordingly, the structure may be such that the inner container does not easily fall out of the outer container hole until it is separated and discharged from the outer container, thereby preventing any separation between the inner container protrusion and the outer container hole until all the contents are used.

[0017] An airless container with an improved center support function for separating inner and outer containers according to another embodiment comprises: an outer container having a first receiving space and an outer neck with an open opening; an inner container inserted into the first receiving space to be in close contact with the inner side of the outer container, having a second receiving space for storing contents and an inner neck with an open opening, which shrinks inside the first receiving space upon disposal and is separated and discharged to the outside through the opening of the outer container; and a cap that rotates in a closing direction on the inner neck and is screw-coupled to the inner container to seal the first and second receiving spaces; wherein, before the inner container is separated and discharged from the outer container, the center of the bottom of the outer container and the center of the bottom of the inner container may be coupled so as to be fixed to each other.

[0018] According to one embodiment, an outer container hole is provided at the center of the bottom portion of the outer container, and an inner container projection is provided at the center of the bottom portion of the inner container, protruding downward and inserted and fixed into the outer container hole. Before the inner container is separated and discharged from the outer container, the inner container projection is maintained in a state where it is inserted into the outer container hole. When the inner container is separated and discharged from the outer container, the inner container is discharged from the outer container by an external force, and the inner container projection inserted into the outer container hole can be forcibly separated.

[0019] According to one embodiment, a first round shape portion is provided at the center of the bottom portion of the outer container, which is formed convexly upward compared to the remaining area of ​​the bottom portion of the outer container, and the outer container hole is a circular hole penetrating the center of the first round shape portion; a second round shape portion is provided at the center of the bottom portion of the inner container, which is formed convexly upward compared to the remaining area of ​​the bottom portion of the inner container and is in close contact with the first round shape portion without a gap, and the inner container protrusion may be a circular protrusion protruding from the center of the second round shape portion toward the outer container hole.

[0020] According to a preferred embodiment, a catch groove is formed on the outer side of the outer container hole, and the inner container projection is provided at the tip portion in the protruding direction and further provided with a stopper having an expanded diameter compared to the outer container hole. When the inner container projection is inserted into the outer container hole, the stopper provided at the tip portion of the inner container projection unfolds into the catch groove and is secured by catch, thereby preventing the inner container projection from accidentally detaching. The stopper may be formed in a flexible shape.

[0021] In addition, according to a preferred embodiment, the inner container protrusion may have a wedge shape in which the diameter gradually increases as it moves up and down. Accordingly, the structure may be such that the inner container does not easily fall out of the outer container hole until it is separated and discharged from the outer container, thereby preventing any separation between the inner container protrusion and the outer container hole until all the contents are used.

[0022] According to a preferred embodiment, when the inner container is disposed of after the contents have been used, if the cap is further rotated in a closing direction while screw-coupled to the inner container, the first receiving space is connected to the outside, allowing outside air to flow into the first receiving space, and the inner container can be contracted to separate it from the outer container.

[0023] According to a preferred embodiment, the inner neck protrudes upward longer than the outer neck, and an inner neck male screw portion having a predetermined length is formed on the outer diameter of the inner neck, wherein the direction of the screw threads located on the upper and lower sides relative to the longitudinal direction of the inner neck may be formed differently from each other.

[0024] According to a preferred embodiment, an outer neck female screw portion of a first length is formed in the inner diameter of the outer neck, and the cap includes a circular cap stopper portion and a cap fastening portion that is connected in a circular tube shape from the edge of the cap stopper portion and is screw-coupled with at least a part of the inner neck, and a cap female screw portion of a second length may be formed in the inner diameter of the cap fastening portion.

[0025] According to a preferred embodiment, the length of the inner neck may be formed to be equal to or longer than the sum of the first length and the second length.

[0026] According to a preferred embodiment, the inner neck male screw portion comprises: a first inner neck male screw portion located at the lower part of the inner neck male screw portion and screw-coupled to the outer neck female screw portion of the first length; and a second inner neck male screw portion located at the upper part of the inner neck male screw portion and screw-coupled to the cap female screw portion of the second length.

[0027] According to a preferred embodiment, the first inner neck male screw portion has a left-hand screw shape, and the second inner neck male screw portion may have a right-hand screw shape.

[0028] According to a preferred embodiment, it further includes an external air inlet passage that penetrates the outer neck and is connected to the first receiving space, and when the cap is additionally rotated in a closing direction while the cap is in a closed state, it communicates with the outside and introduces external air toward the first receiving space.

[0029] According to a preferred embodiment, the external air inlet passages may be formed at set intervals in the circumferential direction through the boundary surface between the inner diameter portion of the outer neck and the outer diameter portion of the inner neck. Additionally, the external air inlet passages may have a structure that communicates with the outside as a predetermined crack occurs through the boundary surface when the inner neck is pulled upward from the outer neck as the cap is further rotated in the closing direction.

[0030] According to a preferred embodiment, the external air inlet passage may further include a circumferential hole having a hollow space radially expanded through the inner diameter portion of the outer neck, and a circumferential projection radially protruding through the outer diameter portion of the inner neck to block the upper entrance of the circumferential hole. According to a preferred embodiment, the external air inlet passage may include a first passage hole, a second passage hole, and a third passage hole. Effects of the invention

[0031] According to the present invention, the bottom of the inner container and the bottom of the outer container are prevented from separating from each other until all the contents are used, and the center of the bottom of each inner and outer container is not disturbed until all the contents are used, thereby allowing the center of the entire container to be easily maintained until all the contents are used, thus improving the convenience of use of the container and providing an advantage in maintaining the appearance and posture of the container.

[0032] In addition, according to the present invention, only the inner container can be easily separated from the outer container after all the contents have been used. Accordingly, the outer container can be separated and recycled, and only the inner container with the contents attached can be separated and disposed of, thereby reducing the cost associated with material usage during container manufacturing and enabling recycling of a large portion, which has an environmentally friendly advantage.

[0033] In addition to the effects described above, the specific effects of the present invention are described together with the specific details for implementing the invention below. Brief explanation of the drawing

[0034] FIG. 1 is a simplified diagram illustrating the overall cross-sectional structure of an airless container with an improved center support function and an inner and outer container separation type according to the first embodiment of the present invention. FIG. 2 is a diagram briefly illustrating the cross-sectional structure of the outer container of an inner and outer container separation type airless container with improved center support function according to the first embodiment of the present invention. FIG. 3 is a diagram briefly illustrating the cross-sectional structure of the inner container of an airless container with an improved center support function in the first embodiment of the present invention. FIGS. 4 and 5 are enlarged cross-sections of the entire and part of an airless container with an improved center support function according to a second embodiment of the present invention. FIG. 6 is an enlarged cross-sectional view of the neck portion of an inner and outer container-separable airless container with an improved center support function according to a second embodiment of the present invention. FIG. 7 is a drawing showing a cross-sectional structure with an external air inlet path applied to an internal and external container-separable airless container with an improved center support function according to the second embodiment of the present invention. FIG. 8 is a diagram briefly illustrating another example of the cross-sectional structure of an inner container. Specific details for implementing the invention

[0035] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0036] To clearly explain the present invention, parts unrelated to the description have been omitted, and the same reference numerals are assigned to identical or similar components throughout the specification. Furthermore, some embodiments of the present invention are described in detail with reference to the exemplary drawings. In assigning reference numerals to the components of each drawing, identical components may have the same reference numeral whenever possible, even if they are shown in different drawings. Additionally, in describing the present invention, if it is determined that a detailed description of related known components or functions could obscure the essence of the present invention, such detailed description may be omitted.

[0037] In describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended only to distinguish the components from other components, and the nature, order, sequence, or number of the components are not limited by these terms. Where it is stated that a component is "connected," "combined," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but that other components may be "interposed" between each component, or that each component may be "connected," "combined," or "connected" through other components.

[0038] In addition, for convenience of explanation in implementing the present invention, the components may be described in detail; however, these components may be implemented within a single device or module, or a single component may be divided and implemented across multiple devices or modules.

[0039] Hereinafter, an airless container with an improved center support function and a separate inner and outer container according to various embodiments will be described with reference to the attached drawings.

[0040] [First embodiment of an airless container with separate inner and outer containers]

[0041] FIG. 1 is a simplified diagram illustrating the overall cross-sectional structure of an inner and outer container separable airless container with improved center support function according to the first embodiment, FIG. 2 is a simplified diagram illustrating the cross-sectional structure of the outer container of the inner and outer container separable airless container with improved center support function according to the first embodiment, and FIG. 3 is a simplified diagram illustrating the cross-sectional structure of the inner container of the inner container separable airless container with improved center support function according to the first embodiment.

[0042] Referring to FIGS. 1 to 3, an airless container (100) with an inner and outer container separation type according to the first embodiment will be described. The airless container (100) with an inner and outer container separation type according to the first embodiment includes an outer container (110), an inner container (120), and a cap (130).

[0043] The outer container (110) may be made of a recyclable transparent material, preferably a transparent PET (polyethylene terephthalate) material, and various other materials having similar characteristics may be used without limitation.

[0044] The inner container (120) can be inserted into the inner side of the outer container (110). The inner container (120) functions as a container for holding and storing actual contents. After the contents are used up, the inner container (120) can be separated from the inside of the outer container (110) and disposed of.

[0045] The airless container (110) with an inner and outer container separation type according to the first embodiment may have a structure in which the center of the bottom portion (117) of the outer container (110) and the center of the bottom portion (127) of the inner container (120) are fixed to each other before the inner container (120) is separated and discharged from the outer container (110).

[0046] Accordingly, according to the present invention, the center of the bottom portion (127) of the inner container (120) and the center of the bottom portion (117) of the outer container (110) can be fixedly connected to each other until the inner container (120) is separated and discharged from the outer container (110) after the contents have been used up, and separation from each other can be prevented. As a result, the overall center of the container (100) can be easily maintained during use of the contents due to separation between the inner container (120) and the outer container (110), thereby preventing external deformation and improving ease of use. As an example, the inner container (120) may be made of LLDPE (Linear Low Density Polyethylene) material, and various other materials having similar characteristics may be used without limitation.

[0047] Referring to FIG. 1, an external container hole (119) may be provided at the center of the bottom portion (117) of the external container (110). Additionally, an internal container protrusion (129) may be provided at the center of the bottom portion (127) of the internal container (120), which protrudes downward and is inserted and fixed into the external container hole (119). Accordingly, before the internal container (120) is separated and discharged from the external container (110), that is, when the contents remain and the contents are used repeatedly, the state in which the internal container protrusion (129) is inserted into the external container hole (119) may be maintained. In contrast, after the contents are used up, the internal container (120) is separated and discharged from the external container (110), at which time the internal container (120) may be separated and discharged from the inside of the external container (110) by an external force (i.e., the force of the user). At this time, the inner container protrusion (129) inserted into the outer container hole (119) may have a structure in which it is forcibly separated. That is, the inner container protrusion (129) can remain fixedly connected to the outer container hole (119) without being separated from it unless a forceful force is applied by the user.

[0048] At this time, a first round shape portion (118) formed convexly upward compared to the remaining area (i.e., the outer center area) of the bottom portion (117) of the outer container (110) may be provided at the center of the bottom portion (117) of the outer container (110) (see FIG. 2).

[0049] Preferably, the outer container hole (119) may have a circular hole shape that penetrates the center of the first round shape portion (118) in the thickness direction.

[0050] Additionally, a second round shape portion (128) may be provided at the center of the bottom portion (127) of the inner container (120), which is formed convexly upward compared to the remaining area (i.e., the outer center area) of the bottom portion (127) of the inner container (120) and is in close contact with the upper surface of the first round shape portion (118) without gaps (see FIG. 3).

[0051] Preferably, the inner container protrusion (129) may have a circular protrusion shape that protrudes toward the outer container hole (119) from the center of the second round shape portion (128).

[0052] In addition, a catch groove (1191) may be further formed on the outer side of the outer container hole (119) (see FIG. 2). Furthermore, the inner container protrusion (129) may be provided with a stopper (1291) having a diameter expanded compared to the outer container hole (119) and provided at the tip portion in the protruding direction. Accordingly, when the inner container protrusion (129) is inserted into the outer container hole (119), the stopper (1291) provided at the tip portion of the inner container protrusion (129) spreads widely into the catch groove (1191) and is secured by catch, thereby preventing the inner container protrusion (129) from being accidentally detached. Preferably, the stopper may have various shapes, and it is preferable that it be formed in a flexible shape, such as a wing shape, that can be bent well so that the inner container protrusion (129) can be fitted well when inserted into the outer container hole (119).

[0053] Additionally, preferably, the inner container protrusion (129) may have a wedge shape in which the diameter gradually increases as it moves up and down. Accordingly, the inner container protrusion (129) can be prevented from being easily separated from the outer container hole (119) until the inner container (120) is separated and discharged from the outer container (110).

[0054] Meanwhile, according to one embodiment, the inner container (120) of an airless container with an improved center support function and an inner and outer container separation type may be provided with an inner container protrusion (129). The inner container protrusion (129) may have a hollow protrusion structure with an empty interior (see FIG. 8). Referring to FIG. 8, the inner container protrusion (129) may have a hollow tube shape with an empty interior. Additionally, a stopper (1291) may be provided at the tip portion of the inner container protrusion (129). Accordingly, insertion of the inner container protrusion (129) becomes easier, and after insertion, the stopper (1291) elastically restores to open to both sides, thereby improving the insertion retention force of the inner container protrusion (129).

[0055] [Second embodiment of an airless container with separate inner and outer containers]

[0056] FIGS. 4 and 5 are enlarged cross-sectional views of the entire and a portion of an airless container with an improved center support function according to the second embodiment, FIG. 6 is an enlarged cross-sectional view of the neck portion of an airless container with an improved center support function according to the second embodiment, and FIG. 7 is a drawing showing a cross-sectional structure with an external air inlet path applied to an airless container with an improved center support function according to the second embodiment.

[0057] Referring to FIGS. 4 to 7, an airless container (100) with an inner and outer container separation type according to the second embodiment will be described.

[0058] The airless container (100) with an inner and outer container separation type according to the second embodiment has a structure with an improved center support function that prevents the inner container (120) from being separated from the outer container (110) until the contents are all used, and can also have a structure with an improved separation and discharge function for the inner container (120).

[0059] Referring to FIG. 4, an airless container (100) with a separable inner and outer container according to a second embodiment includes an outer container (110), an inner container (120), and a cap (130). The outer container (110) may be made of a transparent material that is recyclable. The inner container (120) may be inserted into the inner side of the outer container (110). The inner container (120) functions as a container for holding and storing actual contents. After the contents are used up, the inner container (120) can be separated from the inside of the outer container (110) and disposed of.

[0060] According to the second embodiment, the inner and outer container separation type airless container (110) may have a structure in which the center of the bottom portion (117) of the outer container (110) and the center of the bottom portion (127) of the inner container (120) are fixedly coupled to each other before the inner container (120) is separated and discharged from the outer container (110). Accordingly, according to the present invention, the center of the bottom portion (127) of the inner container (120) and the center of the bottom portion (117) of the outer container (110) can be fixedly coupled to each other until the inner container (120) is separated and discharged from the outer container (110) after the contents have been used up, and separation from each other can be prevented. As a result, the overall center of the container (100) can be easily maintained while using the contents due to the separation between the inner container (120) and the outer container (110), thereby preventing external deformation and improving ease of use.

[0061] At this time, an external container hole (119) may be provided at the center of the bottom portion (117) of the external container (110). And an internal container projection (129) that protrudes downward and is inserted and fixed into the external container hole (119) may be provided at the center of the bottom portion (127) of the internal container (120).

[0062] Specifically, a first round shape portion (118) may be provided at the center of the bottom portion (117) of the outer container (110), which is formed to be convex upward compared to the remaining area (i.e., the outer center area) of the bottom portion (117) of the outer container (110). And the outer container hole (119) may have a circular hole shape that penetrates the center of the first round shape portion (118) in the thickness direction.

[0063] Specifically, a second round shape (128) may be provided at the center of the bottom portion (127) of the inner container (120), which is formed convexly upward compared to the remaining area (i.e., the outer center area) of the bottom portion (127) of the inner container (120) and is in close contact with the upper surface of the first round shape (118) without any gap. In addition, the inner container protrusion (129) may have a circular protrusion shape that protrudes toward the outer container hole (119) from the center of the second round shape (128).

[0064] Accordingly, before the inner container (120) is separated and discharged from the outer container (110), that is, when the contents are repeatedly used while the contents remain, the inner container protrusion (129) can be maintained in the state of being inserted into the outer container hole (119).

[0065] After the contents have been completely used, the inner container (120) is separated and discharged from the outer container (110) for disposal. At this time, the user can apply force (i.e., external force) to pull the inner container (120) out of the inside of the outer container (110) and separate and discharge it. At this time, the inner container protrusion (129) inserted into the outer container hole (119) can be forcibly separated.

[0066] Meanwhile, referring to FIGS. 4 to 7, the inner and outer container separable airless container (100) includes an outer container (110), an inner container (120), and a cap (130).

[0067] The outer container (110) has a first receiving space (111) and is equipped with an outer neck (112) with an open opening. The outer container (110) may have various container shapes and is not necessarily limited to the shape shown. The opening of the outer container (110) may be opened through the top of the outer neck (112).

[0068] The inner container (120) is inserted into the inner side of the outer container (110), preferably inserted into the first receiving space (111) and having a structure that is in close contact with the inner wall of the outer container (110). Additionally, the inner container (120) has a second receiving space (121) for storing contents. The second receiving space (121) is sealed except for the opening, so that the contents can be stored in a sealed state.

[0069] The inner container (120) is disposed of after the contents are used. When the inner container (120) is disposed of, the inner container (120) may be discharged in a crushed form with reduced volume inside the first receiving space (111) of the outer container (110). The inner container (120) has an inner neck (122), and the opening of the inner container (120) may be opened through the top of the inner neck (122).

[0070] The cap (130) is screw-coupled to at least a portion of the inner neck (121) by rotating it in a closing direction (e.g., clockwise) and can be fastened to seal the first and second receiving spaces (111, 121).

[0071] In other words, when the cap (130) is coupled to the inner neck (121) and fixed in a locked state at the top of the outer container (110), the first and second receiving spaces (111, 121) are sealed from the outside, and the contents can be stored for a long time within the second receiving space (121). The contents stored in the second receiving space (121) of the inner container (120) can be discharged to the outside in a certain amount whenever needed and used, and after the contents are used up, the inner container (120) can be separated from the outer container (110) and discharged to the outside. If the locked cap (130) is further rotated in a closing direction (i.e., reverse direction) (e.g., clockwise), the first receiving space (111) is connected to the outside, allowing air to flow between the inner surface of the outer container (110) and the outer surface of the inner container (120), and the inner container (120) can contract. The contracted inner container (120) can be easily separated through the opening of the outer container (110).

[0072] Additionally, the inner neck (122) of the inner container (120) may have a shape that protrudes upward longer than the outer neck (112) of the outer container (110). And an inner neck male thread section (123) having a predetermined length may be formed on the outer diameter of the inner neck (122). At this time, the inner neck male thread section (123) may be formed such that the direction of the thread (i.e., male thread) located at the top and the direction of the thread (i.e., male thread) located at the bottom are different from each other based on the longitudinal direction (i.e., vertical longitudinal direction) of the inner neck (122). Preferably, among the inner neck male thread section (123), the male thread section (i.e., thread) located at the top may have a right-hand thread shape, and the male thread section (i.e., thread) located at the bottom may have a left-hand thread shape.

[0073] Meanwhile, an outer neck female screw portion (113) of a first length may be formed on the outer neck (112). The outer neck female screw portion (113) may have a structure that is screw-coupled to a left-handed screw portion (i.e., thread) located at the bottom of the inner neck male screw portion (123). Because of this, when the cap (130) is in a locked state and the cap (130) is rotated further in a closing direction (i.e., reverse direction) (e.g., clockwise), the inner neck male screw portion (123) can be separated from the outer neck female screw portion (113) and move upward.

[0074] Additionally, the cap (130) includes a circular cap stopper portion (131) and a cap fastening portion (132) connected in a circular tube shape from the edge of the cap stopper portion (131). The cap fastening portion (132) can be screw-coupled to the upper part of the inner neck (122), for example, the upper portion where the inner neck (122) protrudes higher than the outer neck (112). To this end, a cap female screw portion (133) of a second length can be formed in the inner diameter of the cap fastening portion (132).

[0075] Here, the total length of the inner neck (122) may be equal to or longer than the sum of the first length of the outer neck (112) and the second length of the cap female screw portion (133).

[0076] Preferably, the inner neck male screw portion (123) includes a first inner neck male screw portion (1231) and a second inner neck male screw portion (1232). The first inner neck male screw portion (1231) refers to a male screw portion located at the lower portion of the inner neck male screw portion (123) and can be screw-coupled with the outer neck female screw portion (113) of the first length. The second inner neck male screw portion (1232) refers to a male screw portion located at the upper portion of the inner neck male screw portion (123) and can be screw-coupled with the cap female screw portion (133) of the second length. Additionally, the first inner neck male screw portion (1231) that is screw-coupled with the outer neck female screw portion (113) of the first length may have a left-hand screw shape. Accordingly, when the cap (130) is in a locked state with the second inner neck male screw portion (1232) screwed into it, if force is applied to rotate the cap (130) further in the closing direction (i.e., reverse direction) (e.g., clockwise, etc.), the first inner neck male screw portion (1231) can be released from the screw connection with the outer neck female screw portion (113) and come out upward. Additionally, the second inner neck male screw portion (1232), which is screwed into the second length cap female screw portion (133), may have a right-hand screw shape. Accordingly, when the cap (130) is rotated in the closing direction (i.e., reverse direction) (e.g., clockwise, etc.) while the cap (130) is in an open state, the cap (130) can be screwed into the second inner neck male screw portion (1232) and become locked. Conversely, when the cap (130) is rotated in an opening direction (e.g., counterclockwise) while the cap (130) is locked, the screw connection from the second inner neck screw portion (1232) is released, and the opening of the container can be opened. Preferably, the length of the first inner neck screw portion (1231) may be formed to be shorter than the length of the second inner neck screw portion (1232).

[0077] In addition, according to the second embodiment, an external air inlet passage (170) is further included. The external air inlet passage (170) is an air inlet passage that passes through the outer neck (112) and connects to a first receiving space (111) that forms a boundary between the inner surface of the outer container (110) and the outer surface of the inner container (120). The external air inlet passage (170) can connect the outside of the container and the first receiving space and allow external air to be introduced toward the first receiving space when the cap (130) is additionally rotated in the closing direction while the cap (130) is in a closed, locked state where the cap (130) blocks the opening of the container.

[0078] Preferably, a plurality of external air inlet passages (170) may be arranged circumferentially through the area in close contact between the inner diameter portion of the outer neck (112) and the outer diameter portion of the inner neck (122), that is, the boundary surface between the outer neck (112) and the inner neck (122). For example, the plurality of external air inlet passages (170) may each have a structure in which they are arranged radially at set intervals. Accordingly, when the cap (130) in the locked state is further rotated in the closing direction (i.e., reverse direction) (e.g., clockwise, etc.), the external air inlet passage (170) provided between the outer neck (112) and the inner neck (122) is opened, so that external air can flow between the outer container (110) and the inner container (120).

[0079] Preferably, the external air inlet passage (170) may further include a circumferential hole (1701) having a hollow space that is radially extended through the inner diameter portion of the outer neck (112), and a circumferential projection (1702) that is radially protruded through the outer diameter portion of the inner neck (122) to block the upper opening of the circumferential hole (1701). The circumferential projection (1702) can maintain a structure that always blocks the upper opening of the circumferential hole (1701) regardless of whether the cap (130) is open or closed while the container is in use, that is, while the contents are discharged and used. By doing so, the external air can be blocked from entering through the external air inlet passage (170). If the contents are used up and the inner container (120) is to be disposed of, the cap (130) can be rotated with more force in the closing direction (i.e., reverse direction) (e.g., clockwise) while the cap (130) is in the closed state (i.e., locked state) to rotate the circumferential projection (1702) and open the circumferential hole (1701). By doing so, the external air inlet passage (170) is opened to the outside, allowing the inflow of external air.

[0080] Preferably, the external air inlet passage (170) may include a first passage hole (171). One end of the first passage hole (171) may be connected to a circumferential hole (1701) formed at the upper entrance of the outer neck (112), and the other end of the first passage hole (171) may be connected to a first receiving space (111). Additionally, the external air inlet passage (170) may further include a second passage hole (172) and a third passage hole (173). The second passage hole (172) may be connected from the bottom of the first passage hole (171) toward the area where the outer neck (112) begins, and may guide air to a corner (or round) shaped boundary area between the outer neck (112) and the inner neck (122), thereby facilitating separation between the outer container (110) and the inner container (120) at the corner (or round) shaped boundary area. The third Euro hole (173) is connected to the radial outer side of the outer container (110) in the opposite direction to the second Euro hole (172) at the bottom of the first Euro hole (171), and guides air to the outer corner (or round) shaped boundary area between the outer container (110) and the inner container (120), thereby facilitating separation between the outer container (110) and the inner container (120) at the outer corner (or round) shaped boundary area.

[0081] As described above, according to the configuration and operation of the present invention, the bottom of the inner container and the bottom of the outer container are prevented from separating from each other until all the contents are used, and the center of the bottom of each inner and outer container is not disturbed until all the contents are used, thereby allowing the center of the entire container to be easily maintained until all the contents are used, thus improving the convenience of use of the container and maintaining the appearance and posture of the container.

[0082] Although the present invention has been described above with reference to the illustrated drawings, the present invention is not limited by the embodiments and drawings disclosed in this specification, and it is obvious that various modifications can be made by a person skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration according to the present invention were not explicitly described while describing the embodiments of the present invention above, it is natural to acknowledge that the effects predictable by said configuration should also be recognized. Explanation of the symbols

[0083] 100: Courage 110: External container 111: First containment space 112: External neck 113: External neck female thread 115: Inner diameter of the outer neck 117: Bottom of the outer container 118: First round shaped part 119: External container hole 1191: Hook Home 120: Inner container 121: Second Detention Space 122: Internal neck 123: Internal neck male thread section 1231: 1st internal neck male thread section 1232: Second internal neck male thread 125: Outer diameter of the inner neck 127: Bottom of the inner container 128: Second round shaped part 129: Internal container protrusion 1291: Stopper 130: Cap 131: Cap closure 132: Cap fastening part 133: Cap female thread 170: External air intake channel 1701: Circular direction hall 1702: Circumferential projection 171: 1st Euro Hall 172: 2nd Euro Hall 173: 3rd Euro Hall

Claims

Claim 1 delete Claim 2 delete Claim 3 delete Claim 4 An outer container having a first receiving space and an outer neck with an open opening; an inner container inserted into the first receiving space to be in close contact with the inner side of the outer container, having a second receiving space for storing contents and an inner neck with an open opening, which shrinks inside the first receiving space upon disposal and is separated and discharged to the outside through the opening of the outer container; and a cap that rotates in a closing direction on the inner neck and is screw-coupled to the inner container to seal the first and second receiving spaces;It includes, and prior to the inner container being separated and discharged from the outer container, the center of the bottom portion of the outer container and the center of the bottom portion of the inner container are joined so as to be fixed to each other; the inner neck protrudes upward longer than the outer neck, and an inner neck male screw portion having a predetermined length is formed on the outer diameter of the inner neck, wherein the directions of the screw threads located on the upper and lower parts of the inner neck male screw portion are formed differently from each other based on the longitudinal direction of the inner neck, and an outer neck female screw portion of a first length is formed on the inner diameter of the outer neck, and the cap includes a circular cap stopper portion and a cap fastening portion connected in a circular tube shape from the rim of the cap stopper portion and screw-coupled to at least a part of the inner neck, wherein a cap female screw portion of a second length is formed on the inner diameter of the cap fastening portion, and the inner neck male screw portion includes a first inner neck male screw portion located at the lower part of the inner neck male screw portion and screw-coupled to the outer neck female screw portion of the first length, and the inner neck An airless container with an improved center support function, comprising a second inner neck male screw portion located at the upper part of the male screw portion and screw-coupled with the cap female screw portion of the second length, wherein the first inner neck male screw portion has a left-hand screw shape and the second inner neck male screw portion has a right-hand screw shape, and further comprising an external air inlet passage that penetrates the outer neck and connects to the first receiving space, wherein when the cap in the locked state rotates further in the closing direction, the external air inlet passage opens so that external air flows between the outer container and the inner container. Claim 5 In claim 4, an outer container hole is provided at the center of the bottom portion of the outer container, and an inner container projection is provided at the center of the bottom portion of the inner container, protruding downward and inserted and fixed into the outer container hole; prior to the inner container being separated and discharged from the outer container, the inner container projection is maintained in a state where it is inserted into the outer container hole, and when the inner container is separated and discharged from the outer container, the inner container is discharged from the outer container by an external force, thereby forcibly separating the inner container projection inserted into the outer container hole, thereby improving the center support function of the inner and outer container separation type airless container. Claim 6 In claim 5, a first round shape portion formed convex upward relative to the remaining area of ​​the bottom portion of the outer container is provided at the center of the bottom portion of the outer container, and the outer container hole is a circular hole penetrating the center of the first round shape portion; a second round shape portion formed convex upward relative to the remaining area of ​​the bottom portion of the inner container is provided at the center of the bottom portion of the inner container and is capable of adhering closely to the first round shape portion without gap, and the inner container protrusion is a circular protrusion protruding from the center of the second round shape portion toward the outer container hole, thereby providing an airless container with an improved center support function for separating the inner and outer containers. Claim 7 An airless container with an improved center support function for separating inner and outer containers, wherein, in the case of disposal of the inner container, the cap is screw-coupled to the inner container and closed, and the cap is further rotated in a closing direction to separate the inner container from the outer container. Claim 8 delete

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