Composite container closure and container combination

Abstract

The application discloses a composite structure container cover and a container combination, which comprises a top cover, a middle plug and a container body. The top cover is provided with a cover top plate and a top cover sidewall. The middle plug is provided with a cylindrical middle plug outer wall, a crimping ring connected to the upper end of the middle plug outer wall and a middle plug bottom plate arranged on the inner side of the lower end of the middle plug outer wall. The middle plug and the top cover are made of a metal plate body and jointly define a heat insulation space in the top cover and the middle plug. The middle plug outer wall is provided with an annular groove, an annular member is arranged in the annular groove, and an outer thread part is arranged on one annular outer sidewall of the annular member.

Description

Technical Field

[0001] This invention relates to a composite structure container lid and container assembly thereof, and more particularly to a composite structure container lid and container assembly thereof for use in containers for holding drinking water or beverages. Background Technology

[0002] In recent years, as modern people pursue environmental protection and reduce the use of disposable plastic containers, carrying insulated bottles or cups to hold drinking water or beverages has become a trend in modern society.

[0003] To achieve both heat preservation and cold retention while maintaining a lightweight design, existing thermos flasks or insulated cups are made of double-layered metal, giving the container an insulating interlayer to reduce the rate of heat conduction. Furthermore, during manufacturing, existing thermos flasks or insulated cups can further enhance their insulation capabilities by creating a vacuum in the insulating interlayer of the main body through vacuum extraction.

[0004] However, the lids of existing thermos cups and bottles do not employ a double-layer metal insulation structure, thus lacking insulation capabilities. Additionally, some container lids incorporate polystyrene or other insulating materials in the center to improve insulation, but this increases the size and weight of the lid. Furthermore, most existing container lids are made of plastic, raising concerns about the release of toxic chemicals from the plastic material when drinking water or beverages come into contact with the lid, causing anxiety among users.

[0005] In addition, some container lids have a metal surface layer on the part of the lid that comes into contact with drinking water or beverages in order to overcome the above problems. However, when the metal surface layer comes into contact with the opening or threaded part of the metal container, there is a metal friction sound, which causes inconvenience to use.

[0006] Due to the factors mentioned above, there is still room for improvement in existing beverage container lids. Therefore, overcoming these problems through structural modifications has become an important issue for this project. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to improve upon the defects of existing container lids and provide a composite structure container lid and container combination thereof.

[0008] To address the aforementioned technical problems, embodiments of the present invention provide a composite structure container lid for use in the opening of a container. The opening has an internal thread on its inner side. The composite structure container lid defines an upper end and a lower end. The composite structure container lid includes: a top cover having a top plate and a top cover sidewall extending downwards from the outer periphery of the top plate; the diameters of the top plate and the top cover sidewall are larger than the diameter of the opening of the container; and a middle plug, the upper end of which is connected to the lower end of the top cover. The plug has a cylindrical outer wall, a crimping ring extending outward from the upper end of the outer wall, and a bottom plate connected to the bottom of the outer wall. The diameter of the outer wall is smaller than the diameter of the opening, allowing it to be inserted into the inner side of the opening of the container. The outer wall has a 360-degree annular groove that surrounds the outer wall and is recessed from the outer side of the outer wall towards the center of the plug. A sealing gasket is fitted onto the lower end of the crimping ring, such that when the crimping ring contacts the upper end of the opening... A sealed enclosure is formed; and an annular member, made of plastic and fitted into the annular groove, the annular member having an annular outer wall that does not protrude from the outer wall of the middle plug, and an external threaded portion formed on the annular outer wall that can mate with the internal threaded portion; wherein the top cover and the middle plug are formed of metal plates, the outer side of the crimping ring is connected to the inner periphery of the bottom end of the top cover side wall, so that the middle plug and the top cover together define a heat-insulating space located inside the top cover and the middle plug; wherein the diameter of the outer wall of the middle plug is matched with The diameter of the inner side of the opening of the container is matched with the position of the external thread portion. When the middle plug is inserted into the inner side of the opening, the outer wall of the middle plug does not contact the inner side of the opening, and the external thread portion can lock into the internal thread portion. When the composite structure container cover is locked into the opening of the container, the crimping ring is located above the upper edge of the opening, and the sealing gasket contacts the upper edge of the opening, thereby forming a seal between the composite structure container cover and the opening.

[0009] In a preferred embodiment of the present invention, the annular member has an annular inner sidewall relative to the annular outer sidewall, and two annular end faces located at the upper and lower ends of the annular member; the annular groove has a groove bottom with a diameter smaller than that of the outer wall of the bolt, and two groove sidewalls connected to the upper and lower ends of the groove bottom; when the annular member is disposed in the annular groove, the inner sidewall of the annular member contacts the groove bottom, and the two annular end faces contact the two groove sidewalls.

[0010] In a preferred embodiment of the present invention, the central plug further comprises a central plug recess formed at the bottom of the central plug and recessed upward, the central plug recess being defined by a central plug inner wall spaced apart from the outer wall of the central plug and a central plug top plate connected to the top of the inner wall of the central plug; wherein the central plug bottom plate is annular, the lower periphery of the central plug inner wall is connected to the inner periphery of the central plug bottom plate and is in close contact with the inner periphery of the central plug bottom plate.

[0011] In a preferred embodiment of the present invention, the annular component is disposed within the annular groove by injection molding.

[0012] In a preferred embodiment of the present invention, the bottom of the annular groove is provided with a plurality of first engaging structures that protrude or are recessed into the bottom surface of the groove, and the annular inner sidewall of the annular member has a plurality of second engaging structures corresponding to the plurality of first engaging structures. The plurality of second engaging structures are complementary in shape to the plurality of first engaging structures and engage with each other.

[0013] In a preferred embodiment of the present invention, the height of the top plate of the middle bolt is configured to be higher than the height of the crimping ring, and the height difference between the top plate of the middle bolt and the crimping ring is configured to be between 5mm and 50mm, so that when the composite structure container cover is locked to the opening of the container, the upper part of the middle bolt recess can be located above the opening.

[0014] In a preferred embodiment of the present invention, the diameter of the central plug recess is configured to be not less than 30 mm, the height of the central plug recess is configured to be not less than 50 mm, and the volume of the central plug recess is configured to be not less than 30 cubic centimeters.

[0015] This invention also provides a container assembly, including: a container having an opening at its upper end and an internal thread on the inner side of the opening; and a composite structure container lid, the composite structure container lid comprising: a top cover having a top plate and a top cover sidewall extending downward from the outer periphery of the top plate, the diameters of the top plate and the top cover sidewall being larger than the diameter of the opening of the container; and a middle plug, the upper end of which is connected to the lower end of the top cover, the middle plug having a cylindrical middle plug outer wall, a crimping ring extending outward from the upper end of the middle plug outer wall, and a middle plug bottom plate connected to the bottom of the middle plug outer wall; wherein... The outer diameter of the plug is smaller than the diameter of the opening, allowing it to be inserted into the inner side of the opening of the container. The outer wall of the plug has a 360-degree annular groove that surrounds the outer wall and is recessed from the outer side of the outer wall toward the center of the plug. A sealing gasket is fitted onto the lower end of the crimping ring, so that a seal is formed when the crimping ring contacts the upper end of the opening. An annular member is made of plastic and is fitted into the annular groove. The annular member has an annular outer wall that is substantially flush with the outer wall of the plug and an external thread formed on the annular outer wall that can mate with the internal thread.

[0016] The top cover and the middle plug are formed of metal plates. The outer side of the crimping ring is connected to the inner periphery of the bottom end of the top cover sidewall, so that the middle plug and the top cover together define a heat-insulating space located inside the top cover and the middle plug. The diameter of the outer wall of the middle plug matches the diameter of the inner side of the opening of the container, and the position of the external thread matches the position of the internal thread. When the middle plug is inserted into the inner side of the opening, the outer wall of the middle plug does not contact the inner side of the opening, and the external thread can lock into the internal thread. When the composite structure container cover is locked into the opening of the container, the crimping ring is located above the upper edge of the opening, and the sealing gasket contacts the upper edge of the opening, so that a seal is formed between the composite structure container cover and the opening.

[0017] In a preferred embodiment of the present invention, the inner wall of the opening of the container of the container assembly has an inner ring protrusion located below the internal thread portion. The surface of the inner ring protrusion and the middle plug located below the annular member have a minimum gap position. The gap between the surface of the inner ring protrusion and the corresponding middle plug at the minimum gap position is smaller than the gap between the inner wall of the opening and the middle plug outside the range of the minimum gap position.

[0018] In a preferred embodiment of the present invention, the inner ring protrusion of the container assembly has an inner conical surface with a diameter that gradually decreases from top to bottom. When the composite structure container lid is locked inside the opening, a point at the lower end of the middle plug is adjacent to the conical surface. The position where the conical surface and the lower end of the middle plug are closest is defined as the minimum gap position.

[0019] One of the beneficial effects of the present invention is that it can provide a composite structure container lid and container assembly made of metal plate and having heat insulation space. It is lightweight, strong and has good heat insulation effect. Furthermore, the annular component and external thread of the composite structure container lid are made of plastic material, which can overcome the problem of metal friction noise generated when the metal structure lid is locked onto the container.

[0020] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are for reference and illustration only and are not intended to limit the present invention. Attached Figure Description

[0021] Figure 1 This is a schematic cross-sectional view of the first embodiment of the composite structure container lid and container assembly of the present invention.

[0022] Figure 2 From Figure 1 A partially enlarged cross-sectional schematic diagram of part II.

[0023] Figure 3 This is a schematic diagram of the composite structure container lid of the present invention being used as a water cup.

[0024] Figure 4 This is a schematic diagram illustrating the usage of the composite structure container lid and container assembly of the present invention, combined with a straw whose length is greater than the height of the container.

[0025] Figure 5 This is an exploded view of the metal plate used to weld the metal body of the composite structure container lid according to the first embodiment of the present invention.

[0026] Figure 6 for Figure 5 The diagram shows a cross-sectional view of the metal body of the composite structure container lid, formed by welding metal plates together.

[0027] Figure 7 This is a schematic diagram illustrating the operation of the present invention, in which an annular component is formed into the annular groove of the composite structure container lid using a molding die.

[0028] Figure 8 This is a three-dimensional schematic diagram of the composite structure container lid according to the second embodiment of the present invention.

[0029] Figure 9 This is a three-dimensional schematic diagram of the composite structure container lid of the second embodiment of the present invention, in which an annular member and an external thread are provided in the annular groove before the bolt is inserted.

[0030] Figure 10 This is a schematic cross-sectional view of the composite structure container lid according to the second embodiment of the present invention. Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of the "composite structure container lid and container assembly thereof" disclosed in this invention. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. This invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this invention. Furthermore, the accompanying drawings of this invention are for simple illustrative purposes only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this invention in detail, but the disclosed content is not intended to limit the scope of protection of this invention. In addition, the term "or" used herein should be interpreted to include, depending on the actual situation, any combination of any one or more of the associated listed items.

[0032] [First Embodiment]

[0033] See Figures 1 to 7 As shown, this embodiment of the invention provides a composite structure container lid 2 and a container assembly having the composite structure container lid 2. The composite structure container lid 2 can be disposed on a container assembly 1 to seal the opening of the container assembly 1.

[0034] The container assembly 1 includes a container 100, which is a cylindrical container with an opening 110 at its upper end. The opening 110 has an annular flange at its upper end and an internal thread 111 on its inner side. In this embodiment, the container 100 can be a double-layered container made of metal sheet, providing heat insulation or cold insulation. However, the container 100 of this invention is not limited to this; it can also be a container made of other materials, such as plastic, ceramic, or glass, providing insulation.

[0035] For ease of explanation, the composite structure container cover 2 can be defined with opposite upper and lower ends. The composite structure container cover 2 includes a top cover 200 located at the upper end, a middle plug 300 connected to the lower end of the top cover 200, and a sealing gasket 500 disposed on the middle plug 300.

[0036] The top cover 200 has a top plate 210 and a side wall 220 extending downward from the outer periphery of the top plate 210. The top plate 210 is generally circular, and the diameters of the top plate 210 and the side wall 220 are larger than the diameter of the opening 110 of the container assembly 1. A stopper 300 is connected to the lower end of the top cover 200. The stopper 300 has a diameter slightly smaller than the diameter of the opening 110, and can be inserted into the opening 110.

[0037] like Figure 2 and Figure 3 As shown, in this embodiment, the stapling has a cylindrical outer stapling wall 310, a crimping ring 320 extending outward from the upper end of the outer stapling wall 310, and an inner stapling wall 330 spaced apart inside the outer stapling wall 310. It also includes a stapling base plate 350 connected between the lower ends of the outer stapling wall 310 and the inner stapling wall 330, and a stapling top plate 340 formed at the upper end of the inner stapling wall 330. The stapling base plate 350 connects the lower ends of the outer stapling wall 310 and the inner stapling wall 330, thereby forming a closure between the lower ends of the outer stapling wall 310, the stapling base plate 350, and the inner stapling wall 330.

[0038] like Figure 1 and Figure 2 As shown, the top plate 210 and side wall 220 of the top cover 200, and the outer wall 310, crimping ring 320, inner wall 330, bottom plate 350, and top plate 340 of the middle bolt 300 are all formed of metal plates. A gap is formed between the top plate 210, the crimping ring 320, and the top plate 340 of the middle bolt, and the outer wall 310 and the middle bolt are also present. The inner walls 330 also maintain a spacing to form another gap, and the gap between the top plate 210 of the cover, the crimping ring 320 and the top plate 340 of the middle bolt, as well as the gap between the outer wall 310 of the middle bolt and the inner wall 330 of the middle bolt are interconnected, thus forming a heat-insulating space 400 between the top cover 200 and the middle bolt 300, thereby reducing the heat conduction and heat convection effects, so that the composite structure container cover 2 has the function of heat insulation.

[0039] It is worth noting that, in order to ensure that the composite structure container cover 2 has sufficient heat insulation effect, the distance between the top plate 210 of the cover and the top plate 340 of the middle plug is preferably configured to be greater than 3mm, and the distance between the outer wall 310 and the inner wall 330 of the middle plug is also configured to be greater than 3mm. This ensures that there is sufficient distance between the top plate 210 of the cover and the top plate 340 of the middle plug, as well as between the outer wall 310 and the inner wall 330 of the middle plug, to reduce heat convection or radiation conduction between the top plate 210 of the cover and the top plate 340 of the middle plug, and between the outer wall 310 and the inner wall 330 of the middle plug.

[0040] refer to Figure 5 and Figure 6 As shown, the top plate 340 of the stopper is integrally formed and connected to the upper end of the inner wall 330 of the stopper. Therefore, the inner wall 330 and the top plate 340 of the stopper form a blind hole that recesses upwards from the lower end of the stopper 300, thus forming a stopper recess 360 that is recessed from the lower end of the stopper 300 toward the top cover 200. The stopper recess 360 can be used to accommodate a straw 120 placed inside the container 100, or as a space for holding drinking water or beverages.

[0041] like Figure 3 The diagram shows the usage state of the container assembly of the present invention when used with a straw 120. In this embodiment, the height of the middle plug 300 of the composite structure container lid 2 is configured such that the height of the crimping ring 320 is lower than the height of the middle plug top plate 340, while the upper end of the middle plug recess 360 is higher than the height of the crimping ring 320. Therefore, when the composite structure container lid 2 is disposed at the opening 110 of the container 100, the lower end of the middle plug recess 360 extends below the opening 110 of the container assembly 1, and the upper end of the middle plug recess 360 can protrude from the upper end of the opening 110. The portion of the central plug recess 360 protruding above the opening 110 can form a straw-accommodating space for accommodating a straw. Therefore, when the container assembly 1 is used with a straw 120 whose length is greater than the height of the container 100, the portion of the upper end of the straw 120 extending outside the opening 110 can be accommodated in the straw-accommodating space above the central plug recess 360. This ensures that when the straw 120 is placed inside the container 100, the composite structure container lid 2 will not interfere with the straw 120 when it is closed on the opening 110, and there is no need to remove the straw 120 from the container 100 to avoid contamination of the straw 120.

[0042] like Figure 4As shown, the recessed portion 360 can be used to hold beverages or water, thus enabling the composite structure container lid 2 of the present invention to also function as a drinking cup. Furthermore, to ensure that the recessed portion 360 has sufficient volume, its diameter is configured to be no less than 60% of the inner diameter of the opening 110 of the container 100, and its height is configured to be greater than its diameter. More specifically, the diameter of the recessed portion 360 is no less than 30 mm, its height is no less than 50 mm, and its volume is no less than 30 cubic centimeters (cm³).

[0043] More specifically, in this embodiment, the height difference between the top plate 340 and the crimping ring 320 is configured to be between 5mm and 50mm. This configuration ensures that the length difference between the straw 120 and the height of the container 100 is between 5mm and 50mm. In other words, after the straw 120 is inserted into the container 100, the length of the upper end of the straw 120 extending beyond the upper end of the opening 110 is also between 5mm and 50mm.

[0044] It should be noted that although the middle bolt 300 is provided with the middle bolt recess 360 in this embodiment, the present invention is not limited thereto. For example, in an embodiment of the present invention not shown in other figures, the middle bolt base plate 350 of the middle bolt 300 is a circular plate that completely covers the bottom of the middle bolt 300, and no upwardly recessed blind hole is formed in the center of the middle bolt base plate 350. Therefore, it does not have the middle bolt inner wall 330, the middle bolt top plate 340, or the middle bolt recess 360.

[0045] like Figure 1 and Figure 2 As shown, in this embodiment, the outer wall 310 of the bolt has an annular groove 370 that surrounds the outer wall 310 of the bolt 360 degrees and is recessed from the outer side of the outer wall 310 toward the center of the bolt 300. An annular member 380 is disposed within the annular groove 370. The annular member 380 is made of plastic and fits into the annular groove 370. The annular member 380 has an annular outer wall 381 located on the outer side and an external thread portion 382 formed on the annular outer wall 381 that can mate with the internal thread portion 111. An annular inner wall 383 is formed on one side of the annular member 380 opposite to the annular outer wall 381, and two annular end faces 384 are formed at the upper and lower ends of the annular member 380, respectively.

[0046] When the annular member 380 is disposed in the annular groove 370, the outer annular wall 381 is flush with the outer wall 310 of the middle bolt, and the inner annular wall contacts the bottom of the groove 371, and the two annular end faces 384 contact the two groove side walls 372.

[0047] It is worth noting that the annular component 380 can be set in the annular groove 370 using an in-mold insert molding process, so that the annular component 380 and the annular groove 370 can be tightly combined, and the annular component 380 can be stably set in the annular groove 370.

[0048] Furthermore, to further enhance the engagement stability between the annular member 380 and the annular groove 370, a plurality of first engaging structures 373 protruding or recessed into the surface of the groove bottom 371 of the annular groove 370 are provided, and a plurality of second engaging structures 385 with complementary shapes to the plurality of first engaging structures 373 are provided on the annular inner sidewall 383 of the annular member 380. The plurality of second engaging structures 385 can engage within the plurality of first engaging structures 373, thereby enhancing the engagement force between the annular member 380 and the annular groove 370, so that when the composite structure container cap 2 is locked into the opening 110 of the container 100, the annular member 380 will not rotate relative to the stud 300 due to the frictional force of the contact between the external thread portion 382 and the internal thread portion 111.

[0049] like Figure 1 and Figure 2 As shown, the position of the external thread 382 is matched with the position of the internal thread 111, and the pitch and diameter of the external thread 382 are matched with the pitch and diameter of the internal thread 111. Therefore, when the middle bolt 300 is inserted into the inside of the opening 110 and the composite structure container cover 2 is rotated, the external thread 382 can lock into the internal thread 111, thereby locking the composite structure container cover 2 into the opening 110 of the container 100.

[0050] When the composite structure container cover 2 is locked to the opening 110, the crimping ring 320 is located above the upper edge of the opening 110, and the sealing gasket 500 contacts the upper edge of the opening 110 and seals with the opening 110, thereby forming a seal between the composite structure container cover 2 and the opening 110, so that the fluid stored inside the container 100 will not leak out.

[0051] The above-described design of the present invention ensures that when the composite structure container lid 2 is locked into the opening 110 of the container 100, only the plastic external thread 382 and the internal thread 111 will contact each other, while the outer wall 310 of the middle bolt 300 will not contact the inner wall of the opening 110. Therefore, the friction noise generated when the external thread 382 and the internal thread 111 are locked together can be avoided.

[0052] Furthermore, except for the annular component 380 and the external threaded portion 382, ​​which are made of plastic, the rest of the composite structure container lid 2 of the present invention is formed of metal plates. As a result, most of the surface of the stopper 300 that comes into contact with the drinking water or beverage inside the container 100 is a metal surface, which reduces the chance of drinking water or beverage coming into contact with plastic and avoids safety concerns about the release of toxic chemicals when plastic comes into contact with hot beverages or drinking water.

[0053] Furthermore, in this embodiment, the container 100 has an inner ring protrusion 130 located below the internal thread portion 111 below the opening 110. There is a minimum gap position 132 between the inner ring protrusion 130 and the lower end of the middle plug 300. The gap between the surface of the inner ring protrusion 130 and the corresponding outer surface of the middle plug 300 at the minimum gap position 132 is smaller than the gap between the inner wall of the opening 110 and the middle plug 300 outside the range of the minimum gap position 132.

[0054] More specifically, such as Figure 2 As shown, in this embodiment, the inner ring protrusion 130 is formed below the opening 110, and the diameter of the inner sidewall of the inner ring protrusion 130 is configured to be smaller than the diameter of the inner sidewall of the opening 110. Furthermore, in this embodiment, the connection point between the upper end of the inner ring protrusion 130 and the lower end of the opening 110 has an inner conical surface 131 with a diameter that gradually decreases from top to bottom. When the composite structure container lid 2 is locked inside the opening 110, a point at the lower end of the bolt 300 is adjacent to the inner conical surface 131, and the position where the inner conical surface 131 and the lower end of the bolt 300 are closest is defined as the minimum gap position 132.

[0055] In a preferred embodiment of the present invention, when the composite structure container cover 2 is locked into the opening 110, at the minimum gap position 132, the gap between the surface of the inner ring protrusion 130 and the lower end of the middle bolt 300 can be less than 0.1 mm. Even when the composite structure container cover 2 is locked, the lower end of the middle bolt 300 can contact the inner conical surface 131, thereby eliminating the gap between the lower end of the middle bolt 300 and the inner ring protrusion 130.

[0056] The above design reduces the gap between the lower end of the stopper 300 and the opening 110 of the container 100, thereby limiting or reducing the flow rate of drinking water or beverage stored inside the container 100 through the gap at the minimum gap position 132. This reduces the chance of the annular member 380 and the internal thread 111 coming into contact with drinking water or beverage, thus avoiding any concerns from the user about the beverage or drinking water coming into contact with the plastic.

[0057] The following provides a more detailed description of the structure of the composite container lid 2 described in the invention and its manufacturing method. For example... Figure 5 As shown, the composite structure container cover 2 of the present invention is generally made of a first plate P1 to form the top cover 200, and a second plate P2 and a third plate P3 to form the middle bolt 300. The first plate P1, the second plate P2 and the third plate P3 can be made of titanium metal plate or stainless steel plate with a thickness between 0.3 mm and 1.5 mm, and are manufactured by means of stamping, rolling and other means, and are connected into one piece by welding to form the composite structure container cover 2.

[0058] More specifically, such as Figure 5 As shown, in this embodiment, the top plate 210 and the side wall 220 of the top cover 200 are integrally formed from the first plate P1; the crimping ring 320 and the outer wall 310 of the middle bolt 300 are integrally formed from the second plate P2; the inner wall 330 and the top plate 340 of the middle bolt are integrally formed from the third plate. Furthermore, the bottom plate 350 of the middle bolt is also formed from the second plate P2, thus making the bottom plate 350 integrally connected to the lower end of the outer wall 310 of the middle bolt.

[0059] And as Figure 6 The diagram shows the state in which the first plate P1, the second plate P2, and the third plate P3 are welded together to form the metal body of the composite structure container cover 2. In this embodiment, the welding method for the first plate P1, the second plate P2, and the third plate P3 is to weld the outer periphery of the crimping ring 320 to the lower end of the inner side wall 220 of the top cover by welding means, thus forming a first welded part W1 at the junction of the outer periphery of the crimping ring 320 and the lower end of the top cover side wall 220. Furthermore, one end of the bolt base plate 350 relative to the bolt outer wall 310 is connected to the lower end of the bolt inner wall 330 by welding means, thus forming a second welded part W2 at the junction of the bolt base plate 350 and the lower end of the bolt inner wall 330.

[0060] It is worth noting that although this embodiment discloses that the bolt base plate 350 is formed by the second plate P2 and integrally formed on the lower end of the bolt outer wall 310, and the second welded portion W2 is formed at the junction of the bolt base plate 350 and the lower end of the bolt inner wall 330, the present invention is not limited thereto. For example, in an embodiment of the present invention not shown in the figures, the bolt base plate 350 can also be formed by the third plate P3, the bolt base plate 350 is integrally formed and connected to the lower end of the bolt inner wall 330, and the second welded portion W2 is formed at the junction of the bolt base plate 350 and the lower end of the bolt outer wall 310.

[0061] Then as Figure 7 As shown, after the metal body of the composite structure container lid 2 is manufactured, the annular component 380 can be formed into the annular groove 370 of the central plug 300 by in-mold injection molding. In this embodiment, the metal body of the composite structure container lid 2 is placed in a molding die 600 to form the annular component 380 into the annular groove 370. Exemplarily, the molding die 600 includes a first module 610 and a second module 620 disposed on a base plate 630, and a positioning post 660.

[0062] The first module 610 can be a fixed module, and the second module 620 is a movable module that can be displaced in a direction away from the first module 610. The first module 610 and the second module 620 together define an insert receiving portion 640 for inserting the metal body of the composite structure container cover 2. The positioning post 660 is a cylinder with a diameter that matches the central bolt recess 360 of the central bolt 300, and can pass through the base plate 630 along the central axis of the insert receiving portion 640.

[0063] The insert receiving portion 640 is generally a stepped recess with a shape complementary to the top cover 200 and the center plug 300 of the composite structure container cover 2, allowing the metal body of the composite structure container cover 2 to be inserted into the insert receiving portion 640. The insert receiving portion 640 is defined by a first sidewall 641 and a second sidewall 642 respectively disposed on adjacent sides of the first module 610 and the second module 620. Furthermore, a first threaded portion 6411 and a second threaded portion 6421 are formed on the first sidewall 641 and the second sidewall 642 respectively at the positions corresponding to the annular groove 370 of the middle bolt 300. The shapes of the first threaded portion 6411 and the second threaded portion 6421 are complementary to the shapes of the annular outer sidewall 381 and the external thread portion 382 of the annular member 380. Therefore, when the first module 610 and the second module 620 are closed and the metal body of the composite structure container cover 2 is inserted into the insert receiving portion 640, the first threaded portion 6411 and the second threaded portion 6421 can be defined together with the annular groove 370 on the outer sidewall 310 of the middle bolt to form a cavity with a shape complementary to that of the annular member 380.

[0064] In this embodiment, the first module 610 is provided with a sprue 650 and a gate 651 connected to the mold cavity used to form the annular member 380, so that plastic can be injected into the mold cavity used to form the annular member 380, and the annular member 380 is formed within the annular groove 370. After the annular member 380 is formed, the second module 620 and the positioning post 660 of the molding die 600 can be moved, so that the composite structure container cover 2 can be removed from the molding die 600.

[0065] [Second Embodiment]

[0066] like Figures 8 to 10 The image shows a second embodiment of the composite structure container cover 2 described in this invention. It should be noted that the technical features of this embodiment are similar to those of the first embodiment; therefore, the similar technical content of the two embodiments will not be repeated.

[0067] like Figure 8 and Figure 9As shown, in this embodiment, the composite structure container cover 2 includes a top cover 200 and a central plug 300. The top cover 200 includes a top plate 210 and a top cover sidewall 220 extending downward from the outer periphery of the top plate 210. The central plug 300 is connected to the bottom of the top cover 200 and includes a central plug outer wall 310, a central plug bottom plate 350, a central plug inner wall 330, and a central plug top plate. The central plug outer wall 310 is provided with an annular groove 370 surrounding the central plug 300 at 360 degrees. The central plug inner wall 330 and the central plug top plate 340 together define a central plug recess 360 that is recessed upward from the center of the central plug bottom plate 350. An annular member 380 is disposed within the annular groove 370. The annular member 380 has an annular outer sidewall 381 and an annular inner sidewall 383 that contacts the bottom 371 of the annular groove 370. Furthermore, an external thread 382 is formed on the annular outer sidewall 381 to engage with the internal thread 111 of the opening 110 of the container 100.

[0068] In this embodiment, the annular groove 370 is provided with a plurality of first engaging structures 373 protruding from the bottom 371 of the groove, and as shown in the figure Figure 10 As shown, when the annular member 380 is formed in the annular groove 370, the annular inner sidewall 383 of the annular member 380 forms a plurality of second engaging structures 385 whose shapes are complementary to the plurality of first engaging structures 373.

[0069] More specifically, in this embodiment, the plurality of first engaging structures 373 are multiple rib-like structures protruding from the bottom plate 630 of the groove, and each of the first engaging structures 373 is disposed at the bottom 371 of the annular groove 370 in a direction substantially parallel to the central axis of the bolt 300.

[0070] Furthermore, in this embodiment, the upper end of the outer wall 310 of the middle bolt is bent outward to form a crimping ring 320. The outer periphery of the crimping ring 320 is welded to the inner sidewall of the lower end of the top cover sidewall 220 to form a first welded portion W1. The bottom plate 350 of the middle bolt is integrally formed and connected to the bottom end of the inner wall 330 of the middle bolt. The outer periphery of the bottom plate 350 of the middle bolt is bent upward by a folded edge and welded to the inner sidewall of the bottom end of the outer wall 310 of the middle bolt. The welding position between the outer periphery of the bottom plate 350 of the middle bolt and the outer wall 310 of the middle bolt forms a second welded portion W2.

[0071] [Beneficial Effects of the Examples]

[0072] One of the beneficial effects of this invention is that the composite structure container lid and its container assembly are made of metal sheet to form the top cover and middle plug of the composite structure container lid. The middle plug has an annular groove on its outer wall and a plastic annular component is placed in the annular groove. The annular outer wall of the annular component has an external thread, which can be locked to the internal thread on the inside of the container opening. Therefore, when the composite structure container lid is locked in the container opening, the noise generated by the friction between the metal materials can be reduced.

[0073] Furthermore, in addition to the annular component and the internal threaded portion being made of plastic, the top cover and the middle plug of the composite structure container lid described in this invention are made of metal sheet, forming an internal heat insulation space. As a result, the composite structure container lid is lightweight and has good heat insulation effect, and can reduce the area of ​​drinking water or beverages in contact with plastic materials, thus solving the safety concerns caused by drinking water or beverages coming into contact with plastic lids.

[0074] Furthermore, in the composite structure container lid and container assembly of the present invention, the stopper has a stopper recess defined by the inner wall of the stopper and the top plate of the stopper. This stopper recess forms a accommodating space for holding water or beverages, thus enabling the composite structure container lid to also function as a water cup. Moreover, the stopper recess is configured such that when the composite structure container lid is locked in the container opening, the upper section of the stopper recess protrudes beyond the upper end of the opening, forming a straw accommodating space. Therefore, when the container is used with a straw longer than the container height, the portion of the straw extending beyond the container opening can be accommodated in the straw accommodating space, eliminating the need to remove the straw when the composite structure container lid and container assembly are closed in the container opening. Furthermore, when the composite structure container lid and container assembly are opened, the upper end of the straw is directly exposed outside the container opening without needing to pull the straw out with fingers.

[0075] The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention specification and drawings are included in the scope of the patent application of the present invention.

Claims

1. A composite structure container lid for use at the opening of a container, the inner side of the opening having an internal thread, the composite structure container lid defining an upper end and a lower end, characterized in that, The composite structure container cover includes: A lid having a lid body top plate and a lid side wall extending downward from the outer periphery of the lid body top plate, wherein the diameter of the lid body top plate and the lid side wall is larger than the diameter of the opening of the container; A stopper is provided, the upper end of which is connected to the lower end of the top cover. The stopper has a cylindrical outer wall, a crimping ring extending outward from the upper end of the outer wall, and a bottom plate connected to the bottom of the outer wall. The diameter of the outer wall is smaller than the diameter of the opening, allowing it to be inserted into the inside of the opening of the container. The outer wall has a 360-degree annular groove that surrounds the outer wall and is recessed from the outer side of the outer wall toward the center of the stopper. A sealing gasket, wherein the sealing gasket is fitted onto the lower end of the crimping ring, such that a seal is formed when the crimping ring contacts the upper end of the opening; and A ring-shaped component, the ring-shaped component being made of plastic and fitting into the ring-shaped groove, the ring-shaped component having an annular outer sidewall that does not protrude from the outer wall of the middle bolt, and an external thread portion formed on the annular outer sidewall that can engage with the internal thread portion; The top cover and the middle bolt are formed of metal plates. The outer side of the crimping ring is connected to the inner periphery of the bottom end of the side wall of the top cover, so that the middle bolt and the top cover together define a heat insulation space located inside the top cover and the middle bolt. Wherein, the diameter of the outer wall of the middle plug matches the diameter of the inner side of the opening of the container, and the position of the external thread matches the position of the internal thread. When the middle plug is inserted into the inner side of the opening, the outer wall of the middle plug does not contact the inner side of the opening, and the external thread can lock into the internal thread. When the composite structure container cover is locked into the opening of the container, the crimping ring is located above the upper edge of the opening, and the sealing gasket contacts the upper edge of the opening, thereby forming a seal between the composite structure container cover and the opening. The annular member has an annular inner wall relative to the annular outer wall, and two annular end faces located at the upper and lower ends of the annular member; the annular groove has a groove bottom with a diameter smaller than the outer wall of the bolt, and two groove side walls connected to the upper and lower ends of the groove bottom; when the annular member is disposed in the annular groove, the inner wall of the annular member contacts the groove bottom, and the two annular end faces contact the two groove side walls; The stud also has a stud recess formed at the bottom of the stud and recessed upwards. The stud recess is defined by a stud inner wall spaced apart from the outer wall of the stud and a stud top plate connected to the top of the inner wall of the stud. The stud bottom plate is annular, and the lower periphery of the stud inner wall is connected to the inner periphery of the stud bottom plate and fits tightly with the inner periphery of the stud bottom plate. The bottom of the annular groove is provided with a plurality of first engaging structures that protrude or are recessed into the bottom surface of the groove. The inner sidewall of the annular member has a plurality of second engaging structures corresponding to the plurality of first engaging structures. The plurality of second engaging structures are complementary in shape to the plurality of first engaging structures and engage with each other.

2. The composite structure container lid according to claim 1, characterized in that, The annular component is formed by injection molding and is placed inside the annular groove.

3. The composite structure container lid according to claim 1, characterized in that, The height of the top plate of the middle bolt is configured to be higher than the height of the crimping ring, and the height difference between the top plate of the middle bolt and the crimping ring is configured to be between 5mm and 50mm, so that when the composite structure container cover is locked in the opening of the container, the upper part of the middle bolt recess can be located above the opening.

4. The composite structure container lid according to claim 3, characterized in that, The diameter of the central plug recess is configured to be no less than 30 mm, the height of the central plug recess is configured to be no less than 50 mm, and the volume of the central plug recess is configured to be no less than 30 cubic centimeters.

5. A container assembly, characterized in that, include: A container having an opening at its upper end, and an internal thread on the inner side of the opening; and A composite structure container lid, the composite structure container lid comprising: A lid having a lid body top plate and a lid side wall extending downward from the outer periphery of the lid body top plate, wherein the diameter of the lid body top plate and the lid side wall is larger than the diameter of the opening of the container; A stopper is provided, the upper end of which is connected to the lower end of the top cover. The stopper has a cylindrical outer wall, a crimping ring extending outward from the upper end of the outer wall, and a bottom plate connected to the bottom of the outer wall. The diameter of the outer wall is smaller than the diameter of the opening, allowing it to be inserted into the inside of the opening of the container. The outer wall has a 360-degree annular groove that surrounds the outer wall and is recessed from the outer side of the outer wall toward the center of the stopper. A sealing gasket, wherein the sealing gasket is fitted onto the lower end of the crimping ring, such that a seal is formed when the crimping ring contacts the upper end of the opening; and An annular component, the annular component being made of plastic and fitting into the annular groove, the annular component having an annular outer wall substantially flush with the outer wall of the middle bolt, and an external thread portion formed on the annular outer wall and capable of engaging with the internal thread portion; The top cover and the middle bolt are formed of metal plates. The outer side of the crimping ring is connected to the inner periphery of the bottom end of the side wall of the top cover, so that the middle bolt and the top cover together define a heat insulation space located inside the top cover and the middle bolt. Wherein, the diameter of the outer wall of the middle plug matches the diameter of the inner side of the opening of the container, and the position of the external thread matches the position of the internal thread. When the middle plug is inserted into the inner side of the opening, the outer wall of the middle plug does not contact the inner side of the opening, and the external thread can lock into the internal thread. When the composite structure container cover is locked into the opening of the container, the crimping ring is located above the upper edge of the opening, and the sealing gasket contacts the upper edge of the opening, thereby forming a seal between the composite structure container cover and the opening. The annular member has an annular inner wall relative to the annular outer wall, and two annular end faces located at the upper and lower ends of the annular member; the annular groove has a groove bottom with a diameter smaller than the outer wall of the bolt, and two groove side walls connected to the upper and lower ends of the groove bottom; when the annular member is disposed in the annular groove, the inner wall of the annular member contacts the groove bottom, and the two annular end faces contact the two groove side walls; The stud also has a stud recess formed at the bottom of the stud and recessed upwards. The stud recess is defined by a stud inner wall spaced apart from the outer wall of the stud and a stud top plate connected to the top of the inner wall of the stud. The stud bottom plate is annular, and the lower periphery of the stud inner wall is connected to the inner periphery of the stud bottom plate and fits tightly with the inner periphery of the stud bottom plate. The bottom of the annular groove is provided with a plurality of first engaging structures that protrude or are recessed into the bottom surface of the groove. The inner sidewall of the annular member has a plurality of second engaging structures corresponding to the plurality of first engaging structures. The plurality of second engaging structures are complementary in shape to the plurality of first engaging structures and engage with each other.

6. The container assembly according to claim 5, characterized in that, The inner wall of the opening of the container has an inner ring protrusion located below the internal thread. The surface of the inner ring protrusion and the middle plug located below the annular member have a minimum gap position. At the minimum gap position, the gap between the surface of the inner ring protrusion and the corresponding middle plug is smaller than the gap between the inner wall of the opening and the middle plug outside the range of the minimum gap position.

7. The container assembly according to claim 6, characterized in that, The inner ring protrusion has an inner conical surface with a diameter that gradually decreases from top to bottom. When the cap of the composite structure container is locked inside the opening, a point at the lower end of the middle plug is adjacent to the inner conical surface. The position where the inner conical surface and the lower end of the middle plug are closest is defined as the minimum gap position.

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