Couple container

Abstract

The present invention relates to a couple container, in which two or more containers of the same shape are connected or separated from each other through connecting parts facing each other, thereby reducing manufacturing costs, facilitating selective connection to the contents, reducing the possibility of contents spilling, and making it easy to open and close the stopper by connecting them.

Description

[Technical field]

[0001] The present invention relates to a couple container, and more particularly to a couple container in which two or more containers facing each other can be connected or separated from each other. [Background technology]

[0002] Generally, containers such as PET (polyethylene terephthalate), PAN (polyacrylonitrile), PVC (poly vinyl chloride), and PP (polypropylene) are made by blow molding plastic materials and are widely used to store or preserve various beverages such as soft drinks, water, tea, and alcohol, as well as powdered contents, and to allow the contents to be easily removed when necessary.

[0003] Such containers partition the interior so that the contents can be stored, and form an opening in a certain area generally at the top to allow the contents to enter and exit, and a plug is installed in such opening to restrict the entry and exit of the contents.

[0004] Furthermore, when the contents contained in the container are liquid, the container generally contains one type of content, and the user may drink the content by placing the open opening over their mouth.

[0005] In this way, one container is generally used one-to-one for each user, and the type of liquid contents is also limited to one type.

[0006] For example, when storing two or more types of beverages, a separate container must be prepared for each type of beverage, and since each container is separate from the others, it is difficult to store and carry them.

[0007] In addition, regardless of whether one person drinks the entire beverage in one container or whether two or more people share it, one container contains only one type of beverage, so there is also the problem that even if two people with different drinking preferences each want to drink a little bit of their desired beverage, they must each purchase a separate container with their desired beverage in it.

[0008] In addition, if the contents of the container are not all consumed and it is difficult to store the container for a long time after opening it once, the remaining contents will end up being thrown away, which is a waste of resources.

[0009] For the reasons mentioned above, related industries have been developing couple containers, which are sets of two containers that can be easily and hygienically shared by two or more users, or which allow users to selectively drink the beverages in the set according to their preferences.

[0010] Among such prior art, Korean Patent Publication No. 10-2013-0108796 (hereinafter referred to as "Prior Art 1") and Korean Patent Registration No. 10-1022665 (hereinafter referred to as "Prior Art 2") form a protruding coupling portion on one of the opposing coupling surfaces, and form a concave coupling portion corresponding to the protruding coupling portion on the other coupling surface, thereby enabling coupling and disengagement in a male-female structure fitting format.

[0011] One of the containers forming a couple disclosed in Prior Art 1 has a protruding joint on its side wall and the other container has a recessed joint, so that the containers are connected by inserting the protruding joint of one container into the recess of the other container and then rotating relative to each other in that state.

[0012] In Prior Art 1, the containers are joined or unjoined with each opening of the containers closed with a plug, and when attempting to join or unjoin the containers with the plugs open, there is a risk that the contents stored in the containers will spill out through the tilted opening. In other words, when separating or joining the couple containers according to the prior art, the plugs must be closed, which is troublesome and requires careful attention.

[0013] In addition, in Prior Art 1, a container having a protruding joint and a container having a recessed joint must be manufactured separately, and they can only be used as a couple container when they are manufactured into different types, which is troublesome and difficult in that each type must be managed separately.

[0014] On the other hand, in one embodiment of Prior Art 2, a single container is manufactured in which a protruding coupling portion is formed at a position offset to one side from the horizontal center in the vertical direction of the container, and a concave coupling portion is formed at a position offset to the other side from the horizontal center in the vertical direction of the container, and when two containers are placed opposite each other, the opposing protruding coupling portions are press-fitted into or separated from the concave coupling portions.

[0015] In Prior Art 2, when two containers are to be joined together or separated from each other, a force and movement greater than the joining pressure is generated in the direction of the mutual joining, which causes the contents in the containers to momentarily shift to one side (yaw movement). If the plug on the opening is open at this time, the movement caused by the joining or separation of the containers may cause the contents to spill out.

[0016] In a related art for preventing loss of contents due to the above-mentioned yaw movement, Korean Patent Publication No. 10-2013-0107126 (hereinafter referred to as "Prior Art 3") was disclosed.

[0017] In this prior art 3, as shown in the attached Figs. 7 and 8, the method of connecting or disconnecting two couple containers 1 is such that a rail protruding path 2 and a rail groove path 3 on the side wall of the container 1 are formed in the direction of the upper opening of the container 1, thereby reducing the yaw movement of the liquid contents in response to the positional movement of the container 1 due to connection or disconnection.

[0018] However, Prior Art 3 is intended to be manufactured by an injection molding method, and therefore the shape of the opening can only be formed to be the same shape as the horizontal cross section of the interior.

[0019] Most beverage containers are manufactured by blow molding. The shape of the container produced by blow molding is such that the upper part, excluding the opening, is covered by a thickness approximately equal to that of the sidewall, and this thickness range is determined by the size of the container and the thickness and shape of the parison. As a result, the thickness of the manufactured container varies from part to part depending on the shape, but falls within a predetermined range depending on the shape and thickness of the parison. Summary of the Invention [Problem to be solved by the invention]

[0020] The present invention has been made to solve the problems of the prior art, and an object of the present invention is to provide a couple container in which two or more containers of the same shape can be connected or separated from each other through connecting parts facing each other, thereby reducing manufacturing costs, facilitating selective combination for contents, reducing the possibility of contents spilling, and making it easy to open and close the stopper when connected.

[0021] Another object of the present invention is to provide a couple container which is manufactured by blow molding, has sidewalls of the same thickness, and is joined between the same opposing joints, thereby reducing manufacturing costs including the use of a single mold and product management costs. [Means for solving the problem]

[0022] In order to achieve the above object, the couple container according to the present invention has a container shape with an opening formed on the upper side, and a protruding part having a protruding surface protruding with a step from at least one reference surface of a side surface on one side based on a reference position set in a lateral direction with respect to the up-down direction of the container, and a recessed part having a concave surface recessed with a step from the reference surface on the other side based on the reference position, an end of the protruding part adjacent to the recessed part is protruding and extended by a first interval set toward the recessed part at the reference position, and an end of the recessed part adjacent to the protruding part is recessed and extended by a second interval set toward the protruding part at the reference position, In a couple container including a connecting portion in which a boundary surface connecting an end portion and an end portion of the recess facing the protrusion forms an acute angle with respect to each of the protrusion and the recess with the reference position as the center, and the shapes of each portion forming the reference surface, the protrusion, and the recess are continuously formed in the vertical direction of the container, the protrusion further forms a deformation induction groove formed extending in the vertical direction so as to be recessed from the protrusion surface at an intermediate portion in a direction transverse to the vertical direction of the container, or a deformation induction protrusion formed extending in the vertical direction so as to be protruded from the recess, and the recess further forms a deformation induction protrusion or deformation induction groove in which the deformation induction groove or deformation induction protrusion positioned opposite to each other are inserted into each other.

[0023] In addition, a first support surface that protrudes from the reference surface by a predetermined height to form the protrusion, and a second support surface that is recessed from the reference surface by a predetermined height to form the recess, are formed at an angle equal to or greater than the acute angle formed by the boundary surface.

[0024] The first and second support surfaces form acute angles with the protruding and concave surfaces in a direction opposite to the boundary surface.

[0025] The present invention is characterized in that a locking protrusion or locking groove is formed on the protruding surface portion that faces the recessed portion based on the reference position at a vertically intermediate position of the container at the boundary surface, and a locking groove or locking protrusion corresponding to the locking protrusion or locking groove is formed on the concave surface portion that faces the protruding portion based on the reference position.

[0026] The shape and volume of the inside of the recess are formed to be equal to or larger than the outer shape and size of the protrusion that is inserted opposite to the recess. The lower portion of the opening including the connecting portion is integrally blow molded to a set thickness range. Effect of the Invention

[0027] According to the above-mentioned configuration of the present invention, the containers having the same shape and manufactured by blow molding are fitted or separated by vertical sliding with their joints aligned, and are manufactured using a single mold, which not only reduces manufacturing costs and facilitates selective combination of different contents, but also makes it easy to manage the containers due to their single shape. In addition, even when the opening of the container is open during the process of assembling or separating the containers, the contents are prevented from shaking, thereby reducing the possibility of the contents spilling out, and the stopper can be attached or released by sliding one of them upwards, which makes it easy to open and close the stopper. [Brief description of the drawings]

[0028] [Figure 1] FIG. 2 is a perspective view showing a schematic configuration of a couple container according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic plan view showing the structure of the coupling portion of FIG. 1. [Figure 3a] FIG. 11 is a plan view illustrating a coupling process between opposing coupling parts in a horizontal direction. [Figure 3b] FIG. 11 is a plan view illustrating a coupling process between opposing coupling parts in a horizontal direction. [Figure 3c]FIG. 11 is a plan view illustrating a coupling process between opposing coupling parts in a horizontal direction. [Figure 4a] 2 is a cross-sectional view showing the structure and operation of a mold for manufacturing a container including the joint portion of FIG. 1. FIG. [Figure 4b] 2 is a cross-sectional view showing the structure and operation of a mold for manufacturing a container including the joint portion of FIG. 1. FIG. [Figure 4c] 2 is a cross-sectional view showing the structure and operation of a mold for manufacturing a container including the joint portion of FIG. 1. FIG. [Diagram 5] FIG. 13 is a perspective view showing a modification of the present invention and a coupling relationship according to the modification. [Figure 6] FIG. 13 is a partially cutaway perspective view showing the arrangement of locking projections and locking grooves in a schematic manner; [Figure 7] FIG. 1 is a perspective view showing a coupling relationship between couple containers according to the prior art. [Figure 8] 8 is a plan view of a cross-sectional view of the intermediate position of FIG. 7. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] In the best mode, the present invention provides a container shape having an opening on the upper side, and a protruding part having a protruding surface protruding from a reference surface with a step on one side based on a reference position set in a lateral direction with respect to the up-down direction of the container on at least one reference surface of a side, and a recessed part having a concave surface recessed from the reference surface with a step on the other side based on the reference position, an end of the protruding part adjacent to the concave part is protruding and extended by a first interval set toward the concave part at the reference position, and an end of the recessed part adjacent to the protruding part is recessed and extended by a second interval set toward the protruding part at the reference position, the protrusion further forms a deformation induction groove extending in the vertical direction so as to be recessed from the protruding surface at an intermediate portion in a transverse direction to the vertical direction of the container, or a deformation induction protrusion further forms a deformation induction groove extending in the vertical direction so as to be protruded from the recessed surface, and the recess further forms a deformation induction protrusion or deformation induction groove in which the deformation induction groove or deformation induction protrusion positioned opposite each other are inserted into each other.

[0030] Embodiment The terms and words used in this specification and claims should not be interpreted limited to their ordinary or dictionary meanings, but should be interpreted in a way that corresponds to the technical idea of ​​the present invention, based on the principle that "an inventor can appropriately define the concept of a term in order to explain his / her invention in the best possible manner."

[0031] Furthermore, it should be understood that the embodiments described in this specification and the configurations shown in the drawings are merely preferred embodiments of the present invention and do not fully represent the technical ideas of the present invention, and therefore there may be various equivalents and modifications that can replace them at the time of this application.

[0032] Meanwhile, in describing the present invention, the term "upper" refers to the portion of each component that is in the direction opposite to or in that direction of the center of the Earth, and the term "lower" refers to the portion of each component that is in the direction toward or in that direction of the center of the Earth. Hereinafter, the description will be based on the assumption that the opening of the container is on the upper side.

[0033] In addition, in describing the present invention, the term "one side" refers to a container having an opening at the top, and refers to a direction or a portion in that direction based on the horizontal center of one surface forming the joint, and the term "other side" refers to a direction or a portion in that direction based on the horizontal center of one surface.

[0034] In addition, in describing the present invention, the term "inside" refers to a portion toward or in the direction of the interior center of the container, and the term "outside" refers to a portion toward or in the direction opposite to the inside.

[0035] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0036] As shown in FIG. 1, the couple container 10 according to the present invention is based on a parison having an opening (threaded portion) molded by an injection molding machine, as in the case of a general polyethylene terephthalate (PET) bottle, which is made by inserting the parison, which is a preform, into a mold made in a desired shape, heating it to a set temperature, and then blowing in compressed air.

[0037] The couple container 10 is based on a state in which the opening is at the top so that the contents do not spill out when the plug 14 is open.

[0038] In the couple container 10 manufactured by such blow molding, when at least one of the multiple side surfaces is set as a reference surface F, as shown in Fig. 2, a first support surface a is formed on one side A, for example, on the left side of the side surface, protruding from the reference surface F at a predetermined height, centered on a reference position CP set in a horizontal direction to the vertical direction of the couple container 10, in the planar direction of the reference surface F, and a protruding portion 16 including a protruding surface PF having a step so as to be protruded from the reference surface F is formed. Here, the vertical direction of the couple container 10 refers to the vertical direction from the bottom surface of the couple container 10 to the opening 12. Also, the horizontal direction to the vertical direction of the couple container 10 refers to the direction perpendicular to the vertical direction of the couple container 10.

[0039] In addition, on the other side B, centered on the reference position CP, for example, on the right side of the side surface, a second support surface b is recessed at a predetermined height from the reference surface F, and a recess 18 is formed including a concave surface CF that presents a step so as to be recessed relative to the reference surface F.

[0040] Here, the reference position CP is preferably positioned continuously in the vertical direction of the couple container 10 while being positioned, for example, in the center in the horizontal direction with respect to the vertical direction of the couple container 10 in the planar direction of the reference plane F.

[0041] The reason for positioning the reference position CP at the center of the side surface is to ensure that the two ends of the couple container 10 to be coupled do not shift from each other when the couple container 10 is coupled to a mating couple container 10 having an opposite shape with the reference position CP as described below. However, the reference position CP is not limited to this and does not necessarily have to be positioned at the center of the side surface.

[0042] In addition, as shown in FIG. 2, the aforementioned protrusion 16 has a configuration in which the end of the protruding surface PF adjacent to the recess 18 protrudes and extends toward the recess 18 by a first distance d set based on the reference position CP.

[0043] The recess 18 has a shape in which an end of the recessed surface CF adjacent to the protruding portion 16 is recessed and extended by a second distance d' toward the protruding portion 16 with respect to the reference position CP.

[0044] Thus, when viewing the reference plane F from the front, the protruding surface PF and the concave surface CF are formed in a configuration such that they are displaced from each other by respective first interval d and second interval d' that extend from each other with reference to the reference position CP.

[0045] Here, it is preferable that the aforementioned second interval d' has a configuration in which it is recessed and extended more than the first interval d (d < d'). Thereby, in order to horizontally couple two coupling containers 10 that are coupled to face each other, it forms the formation conditions of the buffer portion S.

[0046] In addition to this, the portion of the aforementioned recess 18 that is recessed and extended to the protruding portion 16 at the reference position CP forms a buffer portion S that has a greater depth than the protruding portion 16 of the mating coupling container 10 that is coupled to face it, in the one side A direction and the depth direction, so as to form a space between the protruding portion 16 of the mating coupling container 10.

[0047] Thereby, the boundary surface BW that connects the end portion facing the recess 18 of the protruding surface PF and the end portion facing the protruding portion 16 of the concave surface CF forms a skew angle with respect to the protruding surface PF and the concave surface CF with the reference position CP as the center, and the angle of the skew angle is within the range of an acute angle.

[0048] In addition to this, with the reference plane F and the reference position CP as the boundary, the volume range formed by the recess 18 is designed to be within a range equal to or greater than the volume of the protruding portion 16 formed under the same conditions, such that when the protruding surface PF is in contact with the concave surface CF, it is not loose, that is, it is within the preset interval range.

[0049] Also, it is preferable that the aforementioned first support surface a and second support surface b are within an angular range that is greater than or equal to the acute angle formed by the boundary surface BW with respect to each of the protruding surface PF and the concave surface CF and within a right angle. The direction of the acute angle formed by the first support surface a and the second support surface b can be formed in a direction opposite to the acute angle formed by the boundary surface BW with respect to each of the protruding surface PF and the concave surface CF.

[0050] The angle formed by the first support surface a and the second support surface b is limited in this manner in order to ensure that when the opposing couple containers 10 are connected, the first support surface a and the second support surface b perform an interlocking action through the boundary surface BW when in contact with each other, so that the protrusions 16 do not come out of the recesses 18 when a force acts to separate them in a direction perpendicular to the reference plane F.

[0051] That is, as shown in FIG. 3c, the recess 18 is made to have a wide width in the depth direction and a narrow width in the opposite direction, so that a structure of the same shape inside it is less likely to escape into the narrow space.

[0052] The acute angle between the first support surface a and the second support surface b is formed to be greater than or equal to the acute angle formed by the boundary surface BW so that the mold can be naturally deformed and extracted by the operation of the push part that receives the force of the elastic part when it is extracted from the mold described below.

[0053] As described above, the reference surface F, the first support surface a and the second support surface b, the protruding surface PF, the concave surface CF, and the boundary surface BW that constitute one side of the couple container 10 form one joint portion 20, and such joint portion 20 forms a shape that is continuous in the vertical direction of the couple container 10 with respect to the side of the couple container 10.

[0054] In other words, the configuration of the above-mentioned connecting portion 20 is such that the connection between the couple containers 10 manufactured by blow molding facing each other is made to slide against each other in the vertical direction, thereby making it difficult to connect or release the connection in other directions.

[0055] In addition, as shown in Figure 6, it is preferable that the aforementioned boundary surface BW has a locking protrusion 22 or a locking groove 24 formed in the portion of the protruding surface PF that faces the recess 18 based on the reference position CP at the middle position in the vertical direction, and a locking groove 24 or a locking protrusion 22 corresponding to the locking protrusion 22 or the locking groove 24 is formed in the portion of the concave surface CF that faces the protruding portion 16 based on the reference position CP.

[0056] That is, as shown in FIG. 6, the locking protrusions 22 and the locking grooves 24 are formed side by side on the boundary surface BW of the couple containers 10 at the same height, and when the couple containers 10 are coupled to each other, the locking protrusions 22 of one couple container 10 are fitted into the locking grooves 24 of the other couple container 10, thereby aligning the couple containers 10 side by side at the same height.

[0057] Furthermore, when these locking protrusions 22 and locking grooves 24 slide against a force greater than a set force acting in the vertical direction of the couple containers 10 in order to vertically couple or release the couple containers 10 facing each other, it is preferable that the portion of the protrusion 16 protruding into the mating couple container 10 bends and deforms based on the reference position CP in relation to the space formed by the aforementioned buffer portion S, and also creates a feeling of tightness against the boundary surface BW due to an elastic action that tries to return to its original shape.

[0058] In addition, a plurality of the locking projections 22 and locking grooves 24 may be formed in the boundary surface BW in the vertical direction of the couple container 10.

[0059] 6, the above-mentioned protruding portion 16 can form a deformation induction groove 26 that is recessed from the protruding surface PF at a middle portion in a horizontal direction relative to the vertical direction of the couple container 10 and extends in the vertical direction of the couple container 10. The recessed portion 18 can further form a deformation induction protrusion 28 that protrudes from the concave surface CF and extends in the vertical direction of the couple container 10.

[0060] As can be seen in Figures 3a to 3c and 6, this deformation induction groove 26 is intended to enable the couple containers 10 manufactured by blow molding to be connected to each other in a horizontal direction other than a vertical sliding manner.

[0061] First, referring to FIG. 3a, the front portion of the protrusion 16 is formed wider than the entrance of the recess 18 at the corresponding reference plane F position, and the opposing protrusions 16 abut against each other with a slight misalignment.

[0062] FIG. 3b shows the deformation relationship of adjacent protrusions 16 caused by the couple container 10 being subjected to a force in the direction of arrow F1 when the couple container 10 located at the upper side in FIG. 3a is in a stationary state, or the couple container 10 located at the lower side being subjected to a force pressing the couple containers 10 toward each other as the couple container 10 located at the upper side moves slowly in the direction of arrow F2 and the couple container 10 located at the lower side moves in the direction of arrow F3 faster than arrow F2.

[0063] Due to this action, the portion of each protrusion 16 located in the direction of the reference position CP based on the deformation guiding groove 26 deforms in the direction of the arrows f1, f1' around the deformation guiding groove 26 depending on the angle of the boundary surface BW where they abut, as shown in Figure 3b, and this deformation continues until the moment when the position of the first support surface a exceeds the boundary position of the second support surface b, that is, until the couple containers 10 move from each other by 1 / 2 distance d''.

[0064] At this time, the buffer portion S ensures its space without being interfered with by the deformation of the protruding portion 16 based on the deformation guide groove 26.

[0065] Furthermore, as shown in Figure 3c, the opposing couple containers 10 can be configured by forming a deformation-inducing protrusion 28 protruding from the concave surface CF in the recess 18 corresponding to the aforementioned deformation-inducing groove 26.

[0066] Here, the deformation-inducing protrusion 28 formed in the recess 18 has the opposite function to the deformation-inducing groove 26 formed in the protrusion 16, namely, to support the first support surface a and the second support surface b so as to maintain their abutting state when the coupled couple containers 10 are separated from each other in the horizontal direction, for example, in the lateral direction relative to the vertical direction of the couple containers 10.

[0067] In addition, although not shown in the drawings, the aforementioned deformation guiding groove 26 and deformation guiding protrusion 28 can also be formed in opposite phases with respect to the protruding surface PF and the concave surface CF in which they are located, i.e., by forming the deformation guiding protrusion 28 on the protruding surface PF and the deformation guiding groove 26 on the concave surface CF.

[0068] In this manner, it is predictable that the deformation guiding protrusions 28 and deformation guiding grooves 26 formed in the opposite phase direction to the above-mentioned deformation guiding grooves 26 and deformation guiding protrusions 28 can perform the same category of functions as the deformation guiding grooves 26 and deformation guiding protrusions 28 shown in Figures 3a to 3c.

[0069] The reason for forming the deformation induction groove 26 and the deformation induction protrusion 28 is to automatically pour beverage into each of the couple containers 10 manufactured by blow molding, and to automatically combine and supply the couple containers 10 manufactured by blow molding into which the beverage has been poured.

[0070] That is, connecting the couple containers 10 only in the vertical direction is unreasonable in that it causes delays in the manufacturing process, including pouring the beverage, due to space and connection, and it is difficult to manufacture equipment for the connection.

[0071] Therefore, the horizontal connection as described above is for the convenience of pouring the beverage and subsequent processing.

[0072] Meanwhile, FIGS. 4a to 4c are used to explain the manufacturing process of the couple container 10 manufactured by blow molding, and the manufacturing process will be explained below.

[0073] First, FIG. 4a shows a state where a parison is placed inside the mold before the mold is mated.

[0074] At this time, a sliding core for forming the boundary surface BW and the buffer portion S is placed in a retracted state at a position where it does not interfere with the molding position of the couple container 10 manufactured by blow molding.

[0075] Then, FIG. 4b shows the state where the molds are mated and the push part at the contact point between the molds is pushed against the elasticity of the elasticity part to move the sliding core to the molding position. In this state, air pressure is injected into the parison to perform molding by the mold and the sliding core.

[0076] FIG. 4c shows the state in which the production of the couple container 10 manufactured by blow molding is completed after the cooling process after molding. When the mold is opened, the push part first moves to its original position by the elastic part, and the sliding core moves back from the molding position to a position where it releases the locking action on the couple container 10 manufactured by blow molding.

[0077] In this case, it is preferable that the undercut action on the first support surface a and the second support surface b is designed within an acute angle range that allows easy separation by the operating force due to the movement and displacement of the push portion moved by the elastic portion.

[0078] In addition, it is preferable that the sliding core described above retracts more quickly in response to the movement and displacement of the push part moved by the elastic part, as an acute angle smaller than the acute angle formed by the first support surface a and the second support surface b is required.

[0079] Moreover, it is preferable that the shape of the aforementioned boundary surface BW is formed into a waveform based on the reference position CP as shown in FIG. 3a in response to the retreat speed and position of the sliding core.

[0080] Meanwhile, FIG. 5 shows a modified couple container according to the present invention, in which a protrusion and a recess are formed on each of the four sides.

[0081] This allows a plurality of couple containers 10 to be coupled in various configurations.

[0082] In this way, according to the present invention, the containers having the same shape and manufactured by blow molding are fitted or separated by a vertical sliding method with their joints aligned with each other, and are manufactured using a single mold shape, which not only reduces manufacturing costs and facilitates selective combination of different contents, but also makes it easy to manage the containers due to the single shape. In addition, even when the opening of the container is open during the process of assembling or separating the containers, the contents are prevented from shaking, thereby reducing the possibility of the contents spilling out, and the stopper can be attached or released by sliding one of them upwards, making it easy to open and close the stopper.

[0083] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains should understand that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are illustrative in all respects and are not restrictive.

Claims

1. a couple container having a shape of a container having an opening on an upper side, a protrusion having a protruding surface protruding from a reference surface with a step on one side with respect to a reference position set in a lateral direction with respect to the up-down direction of the container on at least one reference surface of a side, and a recess having a recessed surface recessed from the reference surface with a step on the other side with respect to the reference position, an end of the protrusion adjacent to the recess is protruding and extended by a first interval set toward the recess at the reference position, and an end of the recess adjacent to the protrusion is recessed and extended by a second interval set toward the protrusion at the reference position, a boundary surface connecting the end of the protrusion facing the recess and the end of the recess facing the protrusion forms an acute angle with respect to the protrusion and the recess, respectively, with the reference position as a center, and a connecting portion in which the shapes of the reference surface, the protrusion, and the recess are continuously formed in the up-down direction of the container, The protruding portion further has a deformation induction groove formed concavely from the protruding surface at a middle portion transverse to the vertical direction of the container, and extending in the vertical direction, or a deformation induction protrusion formed extending in the vertical direction so as to be protruded from the concave surface, and the recess further has a deformation induction protrusion or deformation induction groove into which the deformation induction groove or deformation induction protrusion located opposite thereto are inserted.

2. 2. The couple container according to claim 1, wherein a first support surface protruding from the reference surface by a predetermined height to form the protrusion and a second support surface recessed from the reference surface by a predetermined height to form the recess are formed at an angle greater than or equal to the acute angle formed by the boundary surface.

3. 3. The couple container according to claim 2, wherein the first and second support surfaces form acute angles with the protruding and concave surfaces, respectively, in a direction opposite to the boundary surface.

4. The couple container described in claim 1, characterized in that a locking protrusion or locking groove is formed on the protruding surface portion facing the recessed portion based on the reference position at a vertically intermediate portion of the boundary surface of the container, and a locking groove or locking protrusion corresponding to the locking protrusion or locking groove is formed on the recessed surface portion facing the protruding portion based on the reference position.

5. 2. The couple container according to claim 1, wherein the inner shape and volume of the recess are equal to or larger than the outer shape and size of the protrusion that is inserted opposite the recess.

6. 2. The couple container according to claim 1, wherein the lower portion of the opening including the connecting portion is integrally blow molded to a set thickness range.

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