TWI839250B - Composite structure container lid and the container assembly thereof - Google Patents

Abstract

Present invention discloses a composite structure container lid and the container assembly thereof, comprising: a top cover, the top cover having a cover top plate and a top cover side wall; a central plug, having a cylindrical outer wall, a press-fit ring connected to the upper end of the central plug outer wall, and a central plug bottom plate positioned at the lower end of the inner side of the central plug outer wall, the central plug and the top cover made of metal plate, and jointly define a thermal insulation space located inside the top cover and the central plug, the outer wall of the central plug provided with a circular groove, and a circular component provided inside the circular groove, and an external threaded provided on a circular outer side wall of the circular component.

Description

Composite structure container cover and container assembly thereof

The present invention relates to a composite structure container cover and a container assembly thereof, and in particular to a composite structure container cover and a container assembly thereof for use in a container for holding drinking water or beverages.

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

In order to achieve the purpose of heat preservation or cold preservation and light weight, the existing thermos or thermos cups are made of double-layer metal, so that the container of the thermos or thermos cup has a heat-insulating interlayer to reduce the heat conduction rate of the thermos or thermos cup. In addition, during the manufacturing of the existing thermos or thermos cups, the heat-insulating interlayer of the main body can be further vacuumed to further improve the heat insulation capacity.

However, the lids used in existing thermos cups or flasks do not use a double-layer metal heat-insulating structure, and therefore do not have heat-insulating capabilities. In addition, in order to improve the heat-insulating capabilities, some container lids will fill the middle plug of the lid with styrofoam or other heat-insulating materials, but this will increase the volume of the container lid and make it heavy. In addition, most existing container lids are made of plastic materials, so there is a concern that drinking water or beverages will release toxic chemicals when they come into contact with the plastic material of the lid, causing anxiety in the user’s heart.

In addition, in order to overcome the above problems, some container covers are provided with a metal surface layer at the part of the container cover that contacts the drinking water or beverages. However, when the metal surface layer contacts the opening or threaded part of the metal container, metal friction sounds are likely to occur, causing troubles in use.

Due to the above factors, there is still room for improvement in the existing beverage container lids. Therefore, how to overcome the above problems through structural improvements has become an important issue in this industry.

The technical problem to be solved by the present invention is to improve the defects of the existing container cover and provide a composite structure container cover and its container assembly.

In order to solve the above technical problems, the embodiment of the present invention provides a composite structure container cover body, which is used to be arranged at the opening of a container, and the inner side of the opening has an internal threaded portion, and the composite structure container cover body can define an upper end and a lower end, and the composite structure container cover body comprises: a top cover, the top cover has a cover top plate, and a top cover side wall extending downward from the outer periphery of the cover top plate, and the diameters of the cover top plate and the top cover side wall are larger than the diameter of the opening of the container; a middle plug, the upper end of the middle plug is connected to the lower end of the top cover, and the The middle plug has a cylindrical middle plug outer wall, a compression 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 diameter of the middle plug outer wall is smaller than the diameter of the opening portion, and can be inserted into the inner side of the opening portion of the container, and the middle plug outer wall is provided with an annular groove that surrounds the middle plug outer wall 360 degrees and is recessed from the outer side surface of the middle plug outer wall toward the center direction of the middle plug; a sealing gasket, the sealing gasket is sleeved on the lower end of the compression ring, so that when the compression ring contacts the upper end of the opening portion The invention relates to a ring-shaped component, wherein the ring-shaped component is made of plastic and is embedded in the ring-shaped groove. The ring-shaped component has a ring-shaped outer side wall that does not protrude from the outer wall of the middle plug, and an outer threaded portion formed on the ring-shaped outer side wall and capable of matching with the inner threaded portion. The top cover and the middle plug are formed by a metal plate body, and the outer side of the press-fit ring is connected to the inner periphery of the bottom end of the side wall of the top cover, so that the middle plug and the top cover jointly define a heat-insulating space located on the inner side of the top cover and the middle plug. The diameter of the outer wall of the middle plug is matched to the inner side of the top cover. The diameter of the inner side of the opening of the container is matched, and the position of the outer thread part is matched with the position of the inner thread part. When the middle bolt is inserted into the inner side of the opening, the outer wall of the middle bolt does not contact the inner side of the opening, and the outer thread part can be locked to the inner thread part. When the composite structure container cover is locked to the opening of the container, the compression ring is located above the upper edge of the opening, and the sealing gasket contacts the upper edge of the opening, so that the composite structure container cover and the opening are sealed.

The present invention also provides a container assembly having the composite structure container cover.

One of the beneficial effects of the present invention is that it can provide a composite structure container cover made of metal plate and having a heat-insulating space and a container assembly thereof, which has the characteristics of light weight, good strength, and good heat-insulating effect, and the annular component and external thread of the composite structure container cover are made of plastic material, which can overcome the trouble of metal friction noise generated by locking the metal structure cover on the container.

To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and description and are not used to limit the present invention.

1:Container combination

2: Composite structure container cover

100:Container

110: Opening

111: Internal thread part

120: Straw

130: Inner ring convex part

131: Inner cone surface

132: Minimum gap position

200: Top cover

210: Top plate of cover

220: Top cover side wall

300: Middle bolt

310: Outer wall of middle bolt

320: Press-fit ring

330: Inner wall of middle plug

340: Middle bolt top plate

350: Middle bolt bottom plate

360: Middle bolt recess

370: Annular groove

371: Bottom of the tank

372: Groove side wall

373: First locking structure

380: Ring-shaped component

381: Annular outer wall

382: External thread part

383: Annular inner wall

384: Ring end face

385: Second locking structure

400: Heat-insulating space

500: Sealing gasket

600: Molding mold

610: First module

620: Second module

630: Base plate

640: Plug-in storage unit

641: First side wall

6411: First thread forming section

642: Second side wall

6421: Second thread forming section

650: Watering the Road

651: Watering the mouth

660: Positioning column

P1: First plate

P2: Second plate

P3: The third plate

W1: First welding section

W2: Second welding section

Figure 1 is a schematic cross-sectional diagram of the composite structure container cover and its container assembly of the first embodiment of the present invention.

Figure 2 is a partial enlarged cross-sectional schematic diagram taken from part II of Figure 1.

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

Figure 4 is a schematic diagram of the composite structure container cover and its container assembly of the present invention when used with a straw whose length is greater than the height of the container.

Figure 5 is a schematic diagram of the exploded view of the metal plate used for welding to form the metal body of the composite structure container cover in the first embodiment of the present invention.

FIG6 is a schematic cross-sectional view of the metal body of the composite structure container cover formed by welding the metal plates shown in FIG5.

Figure 7 is a schematic diagram of the operating state of the present invention in which the annular component is formed in the annular groove of the composite structure container cover through a forming mold.

Figure 8 is a three-dimensional schematic diagram of the composite structure container cover of the second embodiment of the present invention.

Figure 9 is a three-dimensional schematic diagram of the composite structure container cover of the second embodiment of the present invention in a state where the annular component and the external threaded portion have not yet been set in the annular groove of the middle plug.

Figure 10 is a schematic cross-sectional view of the composite structure container cover of the second embodiment of the present invention.

The following is a specific embodiment to illustrate the implementation of the "composite structure container cover and container assembly thereof" disclosed in the present invention. The technical personnel in this field can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the concept of the present invention. In addition, the attached drawings of the present invention are only for simple schematic illustration and are not depicted according to actual size. Please note in advance. The following implementation will further explain the relevant technical content of the present invention in detail, but the disclosed content is not used to limit the scope of protection of the present invention. In addition, the term "or" used in this document may include any one or more combinations of the associated listed items as the case may be.

[First embodiment]

Referring to Figures 1 to 7, the embodiment of the present invention provides a composite structure container cover 2 and a container assembly having the composite structure container cover 2. The composite structure container cover 2 can be arranged on a container assembly 1 to seal the opening of the container assembly 1.

The container assembly 1 has a container 100, which is a cylindrical container and has an opening 110 at the upper end of the container 100. The upper end of the opening 110 forms a circular flange, and the inner side of the opening 110 has an internal threaded portion 111. In this embodiment, the container 100 can be a double-layer container made of a metal plate, and has the effect of heat preservation or cold preservation. However, the container 100 of the present invention is not limited to this, and the container 100 can also be a container made of other materials. For example, the container 100 can also be an insulated container made of plastic, ceramic, or glass.

For the sake of convenience, the composite structure container cover 2 can define a relative upper end and a lower end. 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.

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

As shown in FIG. 2 and FIG. 3, in this embodiment, the middle plug has a cylindrical middle plug outer wall 310, a press-fit ring 320 extending outward from the upper end of the middle plug outer wall 310, and a middle plug inner wall 330 spaced inside the middle plug outer wall 310. And a middle plug bottom plate 350 connected between the middle plug outer wall 310 and the lower end of the middle plug inner wall 330, and a middle plug top plate 340 formed at the upper end of the middle plug inner wall 330. The middle plug bottom plate 350 is connected between the middle plug outer wall 310 and the lower end of the middle plug inner wall 330, so that the lower end of the middle plug outer wall 310, the middle plug bottom plate 350, and the lower end of the middle plug inner wall 330 are closed.

As shown in FIG. 1 and FIG. 2 , the cover top plate 210, the cover side wall 220, and the center bolt outer wall 310, the press-fit ring 320, the center bolt inner wall 330, the center bolt bottom plate 350, and the center bolt top plate 340 of the top cover 200 of the present invention are all formed of metal plates, and a gap is formed between the cover top plate 210, the press-fit ring 320, and the center bolt top plate 340, and the center bolt outer wall 310 and the center bolt inner wall 330. The inner wall 330 of the middle plug also maintains a distance to form another gap, and the gap between the lid top plate 210 and the press-fit ring 320 and the middle plug top plate 340, as well as the gap between the middle plug outer wall 310 and the middle plug inner wall 330 are interconnected, thus forming a heat-insulating space 400 between the top cover 200 and the middle plug 300, thereby reducing the effects of heat conduction and heat convection, and making the composite structure container lid 2 have a heat-insulating effect.

It is worth noting that, in order to make the composite structure container cover 2 have sufficient heat insulation effect, the distance between the cover top plate 210 and the middle bolt top plate 340 is preferably configured to be greater than 3mm, and the distance between the middle bolt outer wall 310 and the middle bolt inner wall 330 is also configured to be greater than 3mm, so that there is sufficient distance between the cover top plate 210 and the middle bolt top plate 340 and between the middle bolt outer wall 310 and the middle bolt inner wall 330, so as to reduce the heat convection conduction or radiation conduction between the cover top plate 210 and the middle bolt top plate 340, and between the middle bolt outer wall 310 and the middle bolt inner wall 330.

As shown in FIG. 5 and FIG. 6 , the middle plug top plate 340 is integrally formed and connected to the upper end of the middle plug inner wall 330 , so that the middle plug inner wall 330 and the middle plug top plate 340 form a blind hole that is recessed upward from the lower end of the middle plug 300 , thereby forming a middle plug recess 360 that is recessed from the lower end of the middle plug 300 toward the top cover 200 . The middle plug recess 360 can be used to accommodate a straw 120 placed inside the container 100 , or used as a storage space for holding water or beverages.

As shown in FIG4 , it is a schematic diagram of the container assembly of the present invention in use with a straw 120. In this embodiment, the height of the middle plug 300 of the composite structure container cover 2 is configured such that the height of the press-fit ring 320 is lower than the height of the middle plug top plate 340, and the upper end height of the middle plug recess 360 is higher than the height of the press-fit ring 320. Therefore, when the composite structure container cover 2 is set on 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 portion of the middle plug recess 360 can protrude from the upper end of the opening 110. The portion of the middle plug recess 360 protruding from the upper end of 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 protruding from the outer side of the opening 110 can be accommodated in the straw accommodating space at the upper end of the middle plug recess 360. When the straw 120 is placed in the container 100, the composite structure container cover 2 will not interfere with the straw 120 when covering the opening 110, and there is no need to remove the straw 120 from the container 100 to prevent the straw 120 from being contaminated.

As shown in FIG3 , the middle plug recess 360 can be used to hold beverages or water, so that the composite structure container lid 2 of the invention also has the function of a drinking cup. Furthermore, in order to make the middle plug recess 360 have a sufficient volume, the diameter of the middle plug recess 360 is configured to be not less than 60% of the inner diameter of the opening 110 of the container 100, and the height of the middle plug recess 360 is configured to be greater than the diameter of the middle plug recess 360. More specifically, the diameter of the middle plug recess 360 is not less than 30 mm, the height of the middle plug recess 360 is not less than 50 mm, and the volume of the middle plug recess 360 is not less than 30 cubic centimeters (cm3).

More specifically, in this embodiment, the height difference between the middle bolt top plate 340 and the crimping ring 320 is configured to be between 5 mm and 50 mm. Through the above configuration, the difference between the length of the straw 120 and the height of the container 100 can be between 5 mm and 50 mm. In other words, after the straw 120 is inserted into the container 100, the length of the upper end of the straw 120 extending from the upper end of the opening 110 can also be between 5 mm and 50 mm.

In particular, in this embodiment, although the middle bolt 300 is provided with the middle bolt recess 360, the present invention is not limited thereto. For example, in an embodiment not shown in other figures of the present invention, the middle bolt bottom plate 350 of the middle bolt 300 is a circular plate body 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 bottom plate 350, so there is no middle bolt inner wall 330, the middle bolt top plate 340, and no middle bolt recess 360 is formed.

As shown in FIG. 1 and FIG. 2 , in this embodiment, an annular groove 370 is provided on the middle plug outer wall 310, which surrounds the middle plug outer wall 310 by 360 degrees and is recessed from the outer side surface of the middle plug outer wall 310 toward the center direction of the middle plug 300, and an annular component 380 is provided in the annular groove 370. The annular component 380 is made of plastic and is embedded in the annular groove 370. The annular component 380 has an annular outer side wall 381 located on the outer side, and an outer threaded portion 382 formed on the annular outer side wall 381 and capable of matching with the inner threaded portion 111. The annular component 380 forms an annular inner side wall 383 on one side relative to the annular outer side wall 381, and two annular end surfaces 384 are formed at the upper end and the lower end of the annular component 380, respectively.

When the annular component 380 is disposed in the annular groove 370, the annular outer side wall 381 is flush with the middle plug outer wall 310, and the annular inner side wall contacts the groove bottom 371, and the two annular end faces 384 contact the two groove side walls 372.

It is worth noting that the annular component 380 can be disposed in the annular groove 370 by using an 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 disposed in the annular groove 370.

In addition, in order to further enhance the stability of the combination of the annular component 380 and the annular groove 370, a plurality of first engaging structures 373 protruding or recessed on the surface of the groove bottom 371 are provided at the groove bottom 371 of the annular groove 370, and a plurality of second engaging structures 385 having shapes complementary to the plurality of first engaging structures 373 are provided on the annular inner side wall 383 of the annular component 380. The plurality of second engaging structures 385 can be engaged with the plurality of first engaging structures 373, and can enhance the engagement strength between the annular component 380 and the annular groove 370, so that when the composite structure container cover 2 is locked in the opening 110 of the container 100, the annular component 380 will not rotate relative to the middle plug 300 due to the friction between the outer threaded portion 382 and the inner threaded portion 111.

As shown in Figures 1 and 2, the position of the outer threaded portion 382 matches the position of the inner threaded portion 111, and the pitch and pitch of the outer threaded portion 382 match the pitch and pitch of the inner threaded portion 111, so that when the middle bolt 300 is inserted into the inner side of the opening 110 and the composite structure container cover 2 is rotated, the outer threaded portion 382 can be locked to the inner threaded portion 111, and the composite structure container cover 2 is locked to the opening 110 of the container 100.

When the composite structure container cover 2 is locked to the opening 110, the compression 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 fits tightly with the opening 110, so that the composite structure container cover 2 and the opening 110 are sealed, so that the fluid stored in the container 100 will not leak out.

The above design of the present invention enables that when the composite structure container cover 2 is locked into the opening 110 of the container 100, only the outer threaded portion 382 made of plastic will contact the inner threaded portion 111, and the middle plug outer wall 310 of the middle plug 300 will not contact the inner side wall of the opening 110, thereby avoiding the friction sound generated when the outer threaded portion 382 and the inner threaded portion 111 are locked.

In addition, the composite structure container cover 2 of the present invention is made of metal plate except for the annular member 380 and the outer threaded portion 382, so that most of the surface of the middle plug 300 that contacts the drinking water or beverage inside the container 100 is a metal surface, thereby reducing the chance of drinking water or beverage contacting plastic and avoiding safety concerns about the release of toxic chemicals when plastic contacts high-temperature beverages or drinking water.

In addition, in this embodiment, the container 100 has an inner ring convex portion 130 located below the inner threaded portion 111 below the opening portion 110, and there is a minimum gap position 132 between the inner ring convex portion 130 and the lower end of the middle plug 300. The gap between the surface of the inner ring convex portion 130 at the minimum gap position 132 and the corresponding outer surface of the middle plug 300 is smaller than the gap between the inner side wall of the opening portion 110 and the middle plug 300 outside the range of the minimum gap position 132.

In more detail, as shown in FIG. 2 , in this embodiment, the inner annular protrusion 130 is formed below the opening 110, and the diameter of the inner side wall of the inner annular protrusion 130 is configured to be smaller than the diameter of the inner side wall of the opening 110. Moreover, in this embodiment, the connection position between the upper end of the inner annular protrusion 130 and the lower end of the opening 110 has an inner conical surface 131 whose diameter gradually decreases from top to bottom. When the composite structure container cover 2 is locked inside the opening 110, a point of the lower end of the middle plug 300 is adjacent to the inner conical surface 131, and the position where the inner conical surface 131 and the lower end of the middle plug 300 are closest is defined as the minimum gap position 132.

In a preferred embodiment of the present invention, when the composite structure container cover 2 is locked in the opening 110, at the minimum gap position 132, the gap between the surface of the inner ring convex portion 130 and the lower end of the middle plug 300 can be less than 0.1 mm, and even when the composite structure container cover 2 is locked, the lower end of the middle plug 300 can contact the inner conical surface 131, so that the gap between the lower end of the middle plug 300 and the inner ring convex portion 130 is eliminated.

Through the above design, the gap between the lower end of the middle plug 300 and the opening 110 of the container 100 is reduced to limit or reduce the flow of the drinking water or beverage stored in the container 100 through the gap at the minimum gap position 132, thereby reducing the chance of the surface of the annular component 380 and the inner threaded portion 111 contacting the drinking water or beverage, thereby avoiding the user's concerns about the contact between the beverage or drinking water and the plastic.

The following further introduces the detailed structure of the composite structure container cover 2 of the present invention and its manufacturing method. As shown in FIG5 , 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 plug 300. The first plate P1, the second plate P2 and the third plate P3 can be made of a titanium plate or a stainless steel plate with a thickness between 0.3 mm and 1.5 mm, and are formed by means of stamping, rolling and the like, and the first plate P1, the second plate P2 and the third plate P3 are connected as a whole by welding to form the composite structure container cover 2.

In more detail, as shown in FIG5 , in this embodiment, the cover body top plate 210 and the top cover side wall 220 of the top cover 200 are integrally formed by the first plate P1; the press-fit ring 320 and the middle plug outer wall 310 of the middle plug 300 are integrally formed by the second plate P2; the middle plug inner wall 330 and the middle plug top plate 340 are integrally formed by the third plate. Moreover, the middle plug bottom plate 350 is also formed by the second plate P2, so that the middle plug bottom plate 350 is integrally formed and connected to the lower end of the middle plug outer wall 310.

As shown in FIG6 , the first plate P1, the second plate P2 and the third plate P3 are welded to form the metal body of the composite structure container cover 2. In this embodiment, the first plate P1, the second plate P2 and the third plate P3 are welded in such a way that the outer periphery of the compression ring 320 is welded to the lower end of the inner side of the top cover side wall 220 by welding means, so that the outer periphery of the compression ring 320 and the lower end of the top cover side wall 220 are connected to form a first welding portion W1. And the end of the middle bolt bottom plate 350 opposite to the middle bolt outer wall 310 is connected to the lower end of the middle bolt inner wall 330 by welding, so that the joint between the middle bolt bottom plate 350 and the lower end of the middle bolt inner wall 330 forms a second welding portion W2.

It is worth noting that, although the present embodiment discloses that the middle bolt bottom plate 350 is formed by the second plate member P2 and is integrally formed at the lower end of the middle bolt outer wall 310, and the second welding portion W2 is formed at the joint between the middle bolt bottom plate 350 and the lower end of the middle bolt inner wall 330, the present invention is not limited thereto. For example, in an embodiment not shown in the present invention, the middle bolt bottom plate 350 can also be formed by the third plate member P3, the middle bolt bottom plate 350 is integrally formed and connected to the lower end of the middle bolt inner wall 330, and the second welding portion W2 is formed at the joint between the middle bolt bottom plate 350 and the lower end of the middle bolt outer wall 310.

Then, as shown in FIG. 7 , after the metal body of the composite structure container cover 2 is manufactured, the annular component 380 can be formed in the annular groove 370 of the middle plug 300 by means of an in-mold insert injection molding process. In this embodiment, the metal body of the composite structure container cover 2 is set in a molding mold 600 to mold the annular component 380 in the annular groove 370. For example, the molding mold 600 includes a first mold block 610 and a second mold block 620 set on a bottom plate 630, and a positioning column 660.

The first mold block 610 can be a fixed mold block, and the second mold block 620 can be a movable mold block that can be displaced in a direction away from the first mold block 610. The first mold block 610 and the second mold block 620 together define a plug-in receiving portion 640 for inserting the metal body of the composite structure container cover 2. The positioning column 660 is a cylinder with a diameter that matches the middle plug recess 360 of the middle plug 300, and can be penetrated in the bottom plate 630 along the direction of the central axis of the plug-in receiving portion 640.

The plug-in receiving portion 640 is substantially a stepped recessed hole whose shape complements the top cover 200 and the middle plug 300 of the composite structure container cover 2, so that the metal body of the composite structure container cover 2 can be inserted into the plug-in receiving portion 640. The plug-in receiving portion 640 is defined by a first side wall 641 and a second side wall 642 respectively disposed on the adjacent sides of the first mold block 610 and the second mold block 620. A first thread forming portion 6411 and a second thread forming portion 6421 are formed at positions of the first side wall 641 and the second side wall 642 corresponding to the annular groove 370 of the middle bolt 300, respectively. The shapes of the first thread forming portion 6411 and the second thread forming portion 6421 complement the shapes of the annular outer side wall 381 and the outer thread portion 382 of the annular member 380. Therefore, when the first mold block 610 and the second mold block 620 are closed and the metal body of the composite structure container cover 2 is inserted into the plug-in receiving portion 640, the first thread forming portion 6411 and the second thread forming portion 6421 can jointly define a mold cavity of the annular component 380 with the annular groove 370 on the outer wall 310 of the middle plug.

In this embodiment, the first mold block 610 is provided with a channel 650 and a gate 651 connected to the mold cavity used to form the annular component 380, so that plastic can be injected into the mold cavity used to form the annular component 380, so that the annular component 380 is overmolded in the annular groove 370. After the annular component 380 is formed, the second mold block 620 and the positioning column 660 of the molding mold 600 can be moved, so that the composite structure container cover 2 can be taken out of the molding mold 600.

[Second embodiment]

As shown in Figures 8 to 10, this is the second embodiment of the composite structure container cover 2 of the present invention. It should be noted that the technical features of this embodiment are similar to those of the first embodiment, so the similar technical contents of the two embodiments will not be repeated.

As shown in Figures 8 and 9, in this embodiment, the composite structure container cover 2 includes a top cover 200 and a middle plug 300. The top cover 200 includes a cover top plate 210 and a top cover side wall 220 extending downward from the outer periphery of the cover top plate 210. The middle plug 300 is connected to the bottom of the top cover 200, and the middle plug 300 includes a middle plug outer wall 310, a middle plug bottom plate 350, a middle plug inner wall 330 and a middle plug top plate. The middle plug outer wall 310 is provided with an annular groove 370 surrounding the middle plug 300 at 360 degrees, and the middle plug inner wall 330 and the middle plug top plate 340 jointly define a middle plug recess 360 recessed upward from the center of the middle plug bottom plate 350. An annular component 380 is provided in the annular groove 370, and the annular component 380 has an annular outer side wall 381 and an annular inner side wall 383 contacting the groove bottom 371 of the annular groove 370. An outer threaded portion 382 is formed on the annular outer side wall 381 to match the inner threaded portion 111 of the opening portion 110 of the container 100.

In this embodiment, the annular groove 370 is provided with a plurality of first engaging structures 373 protruding from the groove bottom 371, and as shown in FIG10, when the annular component 380 is formed in the annular groove 370, the annular inner side wall 383 of the annular component 380 forms a plurality of second engaging structures 385 whose shapes complement the plurality of the first engaging structures 373.

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

Moreover, in this embodiment, the upper end of the middle plug outer wall 310 is bent outward to form a compression ring 320, and the outer periphery of the compression ring 320 is welded to the inner side wall of the lower end of the top cover side wall 220 to form a first welding portion W1. The middle plug bottom plate 350 is integrally formed and connected to the bottom end of the middle plug inner wall 330, and the outer periphery of the middle plug bottom plate 350 is bent upward to form a folded edge and welded to the inner side wall of the bottom end of the middle plug outer wall 310. The outer periphery of the middle plug bottom plate 350 and the welding position of the middle plug outer wall 310 form the second welding portion W2.

[Beneficial effects of the embodiment]

One of the beneficial effects of the embodiment of the present invention is that the composite structure container cover and its container assembly are made of metal plates to form the top cover and the middle plug of the composite structure container cover, the middle plug is provided with an annular groove on the outer wall of the middle plug, and a plastic annular component is provided in the annular groove, and the annular outer wall of the annular component is provided with an external threaded portion, which can be locked to the internal threaded portion on the inner side of the container opening through the external threaded portion, so that when the composite structure container cover is locked in the container opening, the strange sound caused by the friction between metal materials can be reduced.

Furthermore, in addition to the annular component and the inner threaded portion being made of plastic, the composite structure container cover of the present invention has a top cover and a middle plug made of metal plates, and a heat-insulating space is formed inside, so that the composite structure container cover has a light weight and good heat-insulating effect, and can reduce the area of the drinking water or beverage in the container that contacts the plastic material, thereby solving the problem of safety concerns caused by the drinking water or beverage contacting the plastic material cover.

Furthermore, in the composite structure container cover and the container assembly of the present invention, the middle plug has a middle plug recess formed by the inner wall of the middle plug and the top plate of the middle plug, and the middle plug recess forms a storage space that can be used to hold water or beverages, so that the composite structure container cover also has the function of a water cup. And the middle plug recess is configured so that when the composite structure container cover is locked on the opening of the container, the upper section of the middle plug recess can protrude from the upper end of the opening to form a straw storage space, so that when the container is used with a straw whose length is greater than the height of the container, the portion of the upper end of the straw protruding from the container opening can be stored in the straw storage space, so that when the composite structure container cover and the container assembly are closed on the container opening, it is not necessary to pull out the straw. When the composite container lid and its container assembly are opened, the upper end of the straw is directly exposed outside the opening of the container without the need to pull out the straw with fingers.

The above disclosed contents are only the preferred feasible embodiments of the present invention, and do not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made by using the contents of the description and drawings of the present invention are included in the scope of the patent application of the present invention.

1:Container combination

2: Composite structure container cover

100:Container

110: Opening

111: Internal thread part

130: Inner ring convex part

131: Inner cone surface

200: Top cover

210: Top plate of cover

220: Top cover side wall

300: Middle bolt

310: Outer wall of middle bolt

320: Press-fit ring

330: Inner wall of middle plug

340: Middle bolt top plate

350: Middle bolt bottom plate

360: Middle bolt recess

370: Annular groove

380: Ring-shaped component

382: External thread part

400: Heat-insulating space

500: Sealing gasket

Claims (10)

A composite structure container cover is used to be arranged at the opening of a container, the inner side of the opening has an internal threaded portion, the composite structure container cover can define an upper end and a lower end, and the composite structure container cover comprises: a top cover, the top cover has a cover top plate, and a top cover side wall extending downward from the outer periphery of the cover top plate, the diameters of the cover top plate and the top cover side wall are larger than the diameter of the opening of the container; a middle plug, the upper end of the middle plug is connected to the lower end of the top cover, the middle plug has a cylindrical middle plug outer wall, A compression 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 diameter of the middle plug outer wall is smaller than the diameter of the opening portion, and can be inserted into the inner side of the opening portion of the container, and the middle plug outer wall is provided with an annular groove which surrounds the middle plug outer wall 360 degrees and is recessed from the outer side surface of the middle plug outer wall toward the center direction of the middle plug; a sealing gasket, the sealing gasket is sleeved on the lower end of the compression ring, so that the compression ring forms a seal when it contacts the upper end of the opening portion; and an annular structure The annular component is made of plastic and is embedded in the annular groove. The annular component has an annular outer side wall that does not protrude from the outer wall of the middle plug, and an outer threaded portion formed on the annular outer side wall and capable of matching with the inner threaded portion; wherein the top cover and the middle plug are formed by a metal plate, and the outer side of the press-fit 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 jointly define a heat-insulating space located on the inner side of the top cover and the middle plug; wherein the diameter of the outer wall of the middle plug matches the diameter of the container The diameter of the inner side of the opening is equal to the diameter of the inner side of the opening, the position of the outer threaded part matches the position of the inner threaded part, when the middle bolt is inserted into the inner side of the opening, the outer wall of the middle bolt does not contact the inner side of the opening, and the outer threaded part can be locked to the inner threaded part, and when the composite structure container cover is locked to the opening of the container, the compression ring is located above the upper edge of the opening, and the sealing gasket contacts the upper edge of the opening, so that the composite structure container cover and the opening are sealed. The composite structure container cover as described in claim 1, wherein the annular member has an annular inner side wall relative to the annular outer side 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 middle plug, and two groove side walls connected to the upper and lower ends of the groove bottom; when the annular member is arranged in the annular groove, the inner side wall of the annular member contacts the groove bottom, and the two annular end faces contact the two groove side walls. The composite structure container cover as described in claim 2, wherein the middle plug further has a middle plug recess formed at the bottom of the middle plug and recessed upward, and the middle plug recess is defined by a middle plug inner wall spaced apart from the middle plug outer wall, and a middle plug top plate connected to the top end of the middle plug inner wall; wherein the middle plug bottom plate is annular, and the lower periphery of the middle plug inner wall is connected to the inner periphery of the middle plug bottom plate and is tightly fitted with the inner periphery of the middle plug bottom plate. The composite structure container cover as described in claim 3, wherein the annular component is disposed in the annular groove by injection molding. The composite structure container cover as described in claim 4, wherein the groove bottom of the annular groove is provided with a plurality of first engaging structures protruding or recessed on the groove bottom surface, and the annular inner side wall of the annular component has a plurality of second engaging structures corresponding to the plurality of first engaging structures, and the plurality of second engaging structures complement the plurality of first engaging structures in shape and engage with the plurality of first engaging structures. The composite structure container cover as described in claim 5, wherein the height of the middle bolt top plate is configured to be higher than the height of the press-fit ring, and the height difference between the middle bolt top plate and the press-fit 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 end of the middle bolt recess can be located above the opening. The composite structure container cover as described in claim 6, wherein the diameter of the middle plug recess is configured to be not less than 30 mm, the height of the middle plug recess is configured to be not less than 50 mm, and the volume of the middle plug recess is configured to be not less than 30 cubic centimeters. A container assembly with a composite structure container cover, comprising: a container, the upper end of the container having an opening, the inner side of the opening having an internal threaded portion; and a composite structure container cover, the composite structure container cover comprising: a top cover, the top cover having a cover top plate, and a top cover side wall extending downward from the outer periphery of the cover top plate, the diameters of the cover top plate and the top cover side wall being larger than the diameter of the opening of the container; a middle plug, the upper end of the middle plug being connected to the lower end of the top cover, the middle plug having a cylindrical middle plug The container comprises an outer wall, a compression ring extending outward from the upper end of the outer wall of the middle plug, and a middle plug bottom plate connected to the bottom of the outer wall of the middle plug; wherein the diameter of the outer wall of the middle plug is smaller than the diameter of the opening portion, and can be inserted into the inner side of the opening portion of the container, and the outer wall of the middle plug is provided with an annular groove which surrounds the outer wall of the middle plug 360 degrees and is recessed from the outer side surface of the outer wall of the middle plug toward the center direction of the middle plug; a sealing gasket, which is sleeved on the lower end of the compression ring, so that the compression ring forms a seal when it contacts the upper end of the opening portion; and an annular groove; The annular component is made of plastic and is embedded in the annular groove. The annular component has an annular outer wall that is substantially flush with the outer wall of the middle bolt, and an outer threaded portion formed on the annular outer wall and capable of matching with the inner threaded portion; wherein the top cover and the middle bolt are formed of a metal plate, and the outer side of the press-fit ring is connected to the inner periphery of the bottom end of the top cover side wall, so that the middle bolt and the top cover jointly define a heat-insulating space located on the inner side of the top cover and the middle bolt; wherein the diameter of the outer wall of the middle bolt matches the inner diameter of the inner threaded portion of the inner threaded portion. The diameter of the inner side of the opening of the container, the position of the outer threaded part matches the position of the inner threaded part, when the middle bolt is inserted into the inner side of the opening, the outer wall of the middle bolt does not contact the inner side of the opening, and the outer threaded part can be locked to the inner threaded part, and when the composite structure container cover is locked to the opening of the container, the compression ring is located above the upper edge of the opening, and the sealing gasket contacts the upper edge of the opening, so that the composite structure container cover and the opening are sealed. A container assembly with a composite structure container cover as described in claim 8, wherein the inner side wall of the opening of the container has an inner annular convex portion located below the inner threaded portion, the surface of the inner annular convex portion and the middle bolt located below the annular member have a minimum gap position, and the gap between the surface of the inner annular convex portion and the corresponding middle bolt at the minimum gap position is smaller than the gap between the inner side wall of the opening and the middle bolt outside the minimum gap position range. As claimed in claim 9, the container assembly having a composite structure container cover, wherein the inner annular protrusion has an inner conical surface whose diameter gradually decreases from top to bottom, and when the composite structure container cover is locked inside the opening, a point of the lower end of the middle plug is adjacent to the conical surface, and the position where the conical surface and the lower end of the middle plug are closest is defined as the minimum gap position.

Images