Cap special for double-layer bottle

Abstract

The invention relates to a bottle cap connected with a bottle body, and discloses a special double-layer bottle cap which is used for a double-layer physical deformation bottle and comprises a first positioning ring surrounding the inner side of a cap body, the first positioning ring abuts against a second positioning ring on the outer side of a bottle opening of the double-layer bottle, and a gap is reserved between the inner side wall of the cap body and the second positioning ring. A plurality of disconnecting parts are designed on the first positioning ring, and a plurality of air ports are formed in the bottle opening and are communicated with an air pressure space between the inner-layer bottle and the outer-layer bottle. When the air pressure of the air pressure space rises, air in the air pressure space is discharged through the air port, the gap and the disconnection part. On the contrary, when the air pressure of the air pressure space is reduced, the external air enters the air pressure space through the channel. The special cap can quickly keep the air pressure in the bottle balanced, effectively adjust the air pressure in the bottle, ensure the smooth operation of the double-layer bottle in the deformation and recovery process, and prevent the bottle body from being damaged.

Description

Technical Field

[0001] This invention relates to bottle caps that connect to bottle bodies, and more particularly to a cap specifically designed for double-layered bottles. Background Technology

[0002] Chinese patent CN107922089B, titled "Cap Component," describes a first internal valve 31 that controls the flow of contents between the contents and the discharge cylinder. A second internal valve 32 controls the intake and exhaust of external air. Based on the pressure difference between the inside and outside of the container, the second internal valve 32 automatically opens or closes the intake port 23. Its main function is to control the air pressure inside the container to maintain a stable internal pressure. This patent controls air intake and exhaust from the top of the cap. The air intake and exhaust path involves the threaded portion between the cap and the bottle opening. The air intake and exhaust path is relatively long, and the threaded portion slightly obstructs the air path, potentially causing a delay in air intake and exhaust.

[0003] Chinese Patent Publication No. CN110770133B, entitled "Exhaust Container," describes a device that uses an air intake 19 between the outer container 12 and the inner container 11. An air valve 41 is designed to elastically deform and switch between connecting and blocking the air intake 19 and the external gas inlet 34. External gas can be drawn into the space between the outer container 12 and the inner container 11 via the external gas inlet 34, the external gas flow hole 28, the connecting groove 20, and the air intake 19. Furthermore, if the internal pressure between the outer container 12 and the inner container 11 rises to atmospheric pressure, the air valve 41 returns to its original deformation, blocking the air intake 19 from the outside. This patent controls airflow from the top of the lid, but the airflow path involves the threads of the lid and the bottle opening. The relatively long airflow path and the slight obstruction caused by the threads may result in delayed airflow.

[0004] The patent published by Taiwan, China, with publication number TWI669254B, is titled "Double-Layer Preform and Double-Layer Bottle Made Therefrom." This patent describes a pressure space 33, an air passage 34, and a vent 37 between the inner bottle 31 and the outer bottle 32. When the check cap 60 is opened and the outer bottle 32 is squeezed, the contents of the inner bottle 31 are injected outwards through the outlet 62 and the cap 60. At this time, air in the pressure space 33 is released outwards through the air passage 34 and the vent 37 due to the compression. When the compression is released, the external air pressure causes the valve 61 to close the outlet 62, and outside air enters the pressure space 33 through the vent 37 and the air passage 34, causing the outer bottle 32 to expand to its original shape, while the air pressure in the pressure space 33 keeps the inner bottle 31 in a reduced-volume deformation state. The cap of this patent does not cover the vent 37 of the double-walled bottle, making it easier for external foreign objects to block the vent, thus obstructing the air intake and exhaust flow of the double-walled bottle.

[0005] Chinese patent CN216003681U, entitled "One-Way Sealed Double-Layer Bottle," describes a double-walled bottle with a soft inner bottle body 2 and an outer bottle body 1 that is compressible and returns to its original shape after compression. A gap cavity 7 is formed between the inner bottle body 2 and the outer bottle body 1, with a gap opening on one side of the gap cavity 7. A cover 4 covers the mouth of the inner bottle body 2, and the side wall of the cover 4 covers the gap opening. Several second recesses 41 are provided on the inner side wall of the cover 4 to allow outside air to enter the gap cavity 7. A rubber ring 5 is wrapped around the side wall near the gap opening. The rubber ring 5 seals the gap opening when the outer bottle body 1 is compressed, preventing air from escaping through the gap opening. After the outer bottle body 1 is released from compression, air is allowed to enter the gap cavity 7 in one direction. This patent only allows external air to enter the cavity between the inner and outer bottles through the second recess 41 at the bottom of the cap, but does not allow the air in the cavity to escape when the bottle is squeezed. The double-walled bottle is not smooth in the deformation and recovery process, and the bottle body is easily damaged. Summary of the Invention

[0006] This invention provides a special cap for double-walled bottles. This special cap can quickly maintain the balance of air pressure inside the bottle, effectively regulate the air pressure inside the bottle, ensure the smooth operation of the double-walled bottle during deformation and recovery, and avoid damage to the bottle body.

[0007] The above-mentioned objective of the invention is achieved through the following technical solution:

[0008] A special cap for double-walled bottles includes a special cap fitted to the mouth of a double-walled bottle. The double-walled bottle includes an outer bottle that can physically deform and return to its original shape, and an inner bottle that can physically deform inside the outer bottle. There is a pressure space between the inner bottle and the outer bottle. The special cap includes a central dispensing hole and a check valve for closing or opening the central dispensing hole.

[0009] The special cap has a first positioning ring on an inner side wall of its body; the first positioning ring abuts against a second positioning ring on an outer side wall surrounding the bottle mouth; there is a gap between the inner side wall and the second positioning ring; the first positioning ring has several breaks.

[0010] The bottle neck has several air ports above the second positioning ring, and the air ports are connected to the air pressure space; when the air pressure in the air pressure space becomes higher than atmospheric pressure, the air in the air pressure space is discharged to the outside through the air ports, the gaps and the disconnection.

[0011] When the air pressure in the air pressure space becomes less than atmospheric pressure, external air enters the air pressure space through the disconnection, the gap, and the air inlet.

[0012] The aforementioned double-layer bottle cap comprises a bottle opening portion formed on the inner bottle and a second bottle opening portion formed on the outer bottle; the first bottle opening portion is provided with an external thread, and the second bottle opening portion is provided with a second positioning ring; the inner sidewall of the cap body is provided with an internal thread, and the internal thread is engaged with the external thread for tightening.

[0013] The aforementioned double-layer bottle cap has a supporting surface at one top of the cap body, and a central injection hole at the supporting surface; a check valve is assembled on the top, and the check valve includes a valve plate that can elastically deform up and down, the valve plate being used to close or open the central injection hole; and several peripheral injection holes are provided around the periphery of the valve plate.

[0014] The aforementioned double-layer bottle cap includes a dispensing component located above the check valve and fixed to the top; the dispensing component has a dispensing nozzle.

[0015] The above-mentioned double-layer bottle cap includes a dispensing component comprising a covering portion and an annular fastening wall formed at the periphery of the bottom surface of the covering portion, with the dispensing nozzle located above the covering portion; an annular sidewall is provided at the top; a second locking portion is provided on the outer side of the annular fastening wall, and a first locking portion is provided on the inner side of the annular sidewall; the second locking portion engages with the first locking portion, and the dispensing component is fixedly engaged with the cap body.

[0016] The aforementioned double-layer bottle cap includes a partition wall concentrically arranged on the top surface of the cap body along the inner side of the annular sidewall, and an annular mounting groove between the partition wall and the supporting surface; the check valve includes an annular base, which is installed in the annular mounting groove; and the bottom surface of the cover portion of the dispensing component has an annular embedded wall that presses against the annular base.

[0017] In summary, the beneficial technical effects of the present invention are as follows:

[0018] This invention, by setting a gap between the inner wall and the second positioning ring and setting several disconnections in the first positioning ring, enables the air pressure inside the bottle to be quickly kept balanced, effectively regulates the air pressure inside the bottle, ensures the smooth operation of the double-walled bottle during deformation and recovery, and avoids damage to the bottle body.

[0019] The special cap of the present invention allows air to enter and exit from the bottom. The air entry and exit path does not pass through the threaded part between the cap and the bottle mouth, the air entry and exit path is shorter, and the air entry and exit is smooth.

[0020] The special cap of this invention has two positioning points at the mouth of the double-layer bottle: one is that the internal thread of the special cap engages with the external thread at the mouth of the inner bottle, and the other is that the first positioning ring engages with the second positioning ring at the mouth of the outer bottle, which ensures the accuracy and stability of the positioning of the bottle body and the cap.

[0021] The special cap of this invention can cover the air inlet, effectively preventing the problem of external foreign objects blocking the air inlet, and can ensure smooth air intake and exhaust of the double-walled bottle.

[0022] The special cap of this invention allows external air to enter the pressure space between the inner and outer bottles from the bottom of the cap, and also allows the air in the pressure space to be discharged from the bottom of the cap when it is compressed, ensuring the smooth operation of the double-walled bottle during deformation and recovery, and avoiding damage to the bottle body. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the special cover of this invention;

[0024] Figure 2 This is an exploded structural diagram of the special cover of the present invention.

[0025] Figure 3 This is a structural schematic diagram of the special cover of the present invention from another perspective.

[0026] Figure 4 This is a cross-sectional view of the special cover of this invention.

[0027] Figure 5 A cross-sectional view of the special cap of this invention combined with the mouth of a double-walled bottle.

[0028] Figure 6 for Figure 5 A magnified view of a portion of the image.

[0029] Figure 7 A cross-sectional view of the special cap of this invention combined with the bottle mouth, and a description of the air expulsion from the bottle.

[0030] Figure 8 The invention includes a cross-sectional view showing the connection between the cap and the bottle opening, and an illustration of air entering the bottle.

[0031] Figure 9 A schematic diagram of the special cap of this invention combined with a double-walled bottle, and a description of the air being expelled from the bottle.

[0032] Figure 10 A schematic diagram of the special cap of this invention combined with a double-walled bottle is shown, along with a description of air entering the bottle.

[0033] The diagram shows: 1. Lid opening / closing; 10. Lid body; 101. Top; 102. Skirt; 11. Inner sidewall; 12. Internal thread; 13. First positioning ring; 131. Disconnection; 16. Annular sidewall; 161. First locking part; 17. Partition wall; 18. Support surface; 181. Central outlet hole; 19. Annular mounting groove; 20. Check valve; 21. Annular base; 22. Valve plate; 23. Peripheral outlet. 30. Hole; 31. Injection part; 32. Cover part; 33. Annular embedded wall; 34. Annular snap-fit ​​wall; 35. Second locking part; 46. Injection nozzle; 47. Inner bottle; 48. Outer bottle; 49. Outer wall; 50. Pressure space; 60. Air inlet; 41. First bottle mouth; 41. External thread; 42. Second bottle mouth; 43. Second positioning ring; 50. Gap; 61. Bottle mouth; 62. Contents. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-10 The present invention will be described in further detail below.

[0035] like Figures 1 to 4 The present invention provides a double-layer bottle cap, comprising: a cap body 10, a connecting hinged cap 1 connected to the cap body 10, a check valve 20 disposed on the cap body 10, and a dispensing component 30 disposed on the check valve 20 and fixed to the cap body 10.

[0036] The cap body 10 is a plastic molded part, including a top 101 and a skirt 102 perpendicularly connected to the circumference of the top 101. The inner sidewall 11 of the skirt 102 is provided with internal threads 12, and a first positioning ring 13 is provided near the bottom end of the inner sidewall 11 of the skirt 102. The first positioning ring 13 is provided with several disconnected parts 131. The top 101 is provided with a concentric annular sidewall 16 and a partition wall 17. The partition wall 17 is located inside the annular sidewall 16 and surrounds a support surface 18. An annular mounting groove 19 is formed between the partition wall 17 and the support surface 18. The inner surface of the annular sidewall 16 is provided with a recessed first locking part 161. The support surface 18 is provided with a central injection hole 181.

[0037] The check valve 20 is made of an elastic plastic molded part that can physically deform and return to its original shape. The check valve 20 includes an annular base 21, which surrounds and connects a thin-film valve plate 22. The valve plate 22 has elasticity that allows it to bulge up and down, and several peripheral injection holes 23 are provided around its periphery. The check valve 20 is mounted in the annular mounting groove 19 of the cover body 10 with the annular base 21. The valve plate 22 contacts the support surface 18 in a downward arc-shaped concave shape and seals the central injection hole 181.

[0038] The dispensing part 30 is a plastic molded part, including a horizontal cover part 31, an annular insert wall 32 formed on the bottom surface of the cover part 31 near the center, an annular snap-fit ​​wall 33 formed on the bottom surface of the cover part 31 near the periphery, and a dispensing nozzle 35 formed on the center of the cover part 31 protruding upward.

[0039] The outer side of the annular locking wall 33 is provided with a protruding second locking part 331. The dispensing part 30 is locked to the first locking part 161 by the second locking part 331, so that the dispensing part 30 is engaged and fixed with the cap body 10. The annular embedded wall 32 of the dispensing part 30 presses against the annular base 21, so that the check valve 20 is fixed between the cap body 10 and the dispensing part 30.

[0040] like Figure 5 and Figure 6 The special cap is combined with the mouth of one of the double-walled bottles at 50°.

[0041] The double-walled bottle includes an outer bottle 42 capable of physical deformation and returning to its original shape, and an inner bottle 41 capable of physical deformation inside the outer bottle 42. A pressure space 43 exists between the inner bottle 41 and the outer bottle 42. The outer bottle 42 has several air ports 44 connecting to the outside, each air port 44 connecting to the pressure space 43. The bottle mouth 50 is composed of a first bottle mouth 45 formed on the inner bottle 41 and a second bottle mouth 47 formed on the outer bottle 42; the first bottle mouth 45 has an external thread 46, and the second bottle mouth 47 has a second positioning ring 48. The air ports 44 are positioned above the second positioning ring 48.

[0042] The internal thread 12 of the special cap engages with the external thread 46 and is tightened. The first positioning ring 13 of the special cap abuts against the second positioning ring 48, thereby positioning the special cap in conjunction with the first bottle opening 45 and the second bottle opening 47. The inner wall 11 of the cap body 10 covers the air inlet 44. A gap 49 exists between the inner wall 11 of the special cap and the second positioning ring 48. The valve plate 22 of the check valve 20 is tightly fitted against the support surface 18 of the cap body 10, sealing both the central injection hole 181 and the peripheral injection hole 23, preventing external air from entering the inner bottle 41.

[0043] like Figures 7 to 10 When the outer bottle 42 is squeezed, the inner bottle 41 is also squeezed simultaneously. Both the outer bottle 42 and the inner bottle 41 are reduced in volume and deformed. The air pressure in the pressure space 43 becomes higher than atmospheric pressure. The air in the pressure space 43 is discharged outward through the air port 44, the gap 49 and the disconnection part 131. The inner bottle 41 is compressed and undergoes volume reduction deformation. The contents 60 (indicated by arrows filled with fine dots) push the valve plate 22 from the central outlet hole 181 of the cap body 10. The valve plate 22 elastically deforms and arches away from the support surface 18. The arched valve plate 22 opens the central outlet hole 181 and the peripheral outlet hole 23. The contents 60 are released to the dispensing nozzle 35 through the central outlet hole 23 and the peripheral outlet hole 23.

[0044] When the pressure on the outer bottle 42 is released, the air pressure in the pressure space 43 becomes lower than atmospheric pressure. External air is injected into the pressure space 43 through the disconnection 131, the gap 49, and the air port 44, filling the pressure space 43 with air. The contents of the inner bottle 41 stop being released outward, and the external air pressure returns the valve plate 22 to a state of contact with the support surface 18. The central injection hole 181 and the peripheral injection hole 23 are sealed, preventing external air from entering the inner bottle 41. Due to its thin wall, the release of contents 60, and the air pressure in the pressure space 43, the reduced volume deformation of the inner bottle 41 will not recover. Through repeated squeezing and releasing of the outer bottle 42, the contents 60 are squeezed out of the inner bottle 41, eventually reaching a state of near-emptiness.

[0045] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A special cap for a double-walled bottle, comprising a special cap fitted onto the mouth of a double-walled bottle, the double-walled bottle comprising an outer bottle capable of physical deformation and returning to its original shape, an inner bottle capable of physical deformation inside the outer bottle, and a pressure space between the inner bottle and the outer bottle; the special cap comprising a central dispensing hole and a check valve for closing or opening the central dispensing hole; characterized in that: The special cap has a first positioning ring on an inner side wall of its body; the first positioning ring abuts against a second positioning ring on an outer side wall surrounding the bottle mouth; there is a gap between the inner side wall and the second positioning ring; the first positioning ring has several breaks. The bottle mouth is provided with several air ports above the second positioning ring, and the air ports are connected to the air pressure space; When the air pressure in the air pressure space becomes higher than atmospheric pressure, the air in the air pressure space is discharged to the outside through the air inlet, the gap and the disconnection. When the air pressure in the air pressure space becomes less than atmospheric pressure, external air enters the air pressure space through the disconnection, the gap, and the air inlet.

2. The double-walled bottle cap according to claim 1, characterized in that, The bottle mouth is composed of a first bottle mouth formed on the inner bottle and a second bottle mouth formed on the outer bottle; the first bottle mouth is provided with an external thread, and the second bottle mouth is provided with a second positioning ring; the inner sidewall of the cap body is provided with an internal thread, and the internal thread is engaged with the external thread to tighten.

3. The double-walled bottle cap according to claim 1, characterized in that, The top of the cover body is provided with a support surface, and the support surface is provided with a central injection hole; the check valve is assembled on the top, and the check valve includes a valve plate that can be elastically deformed up and down, the valve plate being used to close or open the central injection hole; the periphery of the valve plate is provided with several peripheral injection holes.

4. The double-walled bottle cap according to claim 3, characterized in that, An injection device is provided on the check valve and fixed to the top; the injection device is provided with an injection nozzle.

5. The double-walled bottle cap according to claim 4, characterized in that, The dispensing component includes a cover portion and an annular fastening wall formed at the periphery of the bottom surface of the cover portion. The dispensing nozzle is located above the cover portion. An annular sidewall is provided at the top. A second locking portion is provided on the outer side of the annular fastening wall, and a first locking portion is provided on the inner side of the annular sidewall. The second locking portion is engaged with the first locking portion, and the dispensing component is engaged and fixed with the cap body.

6. The double-walled bottle cap according to claim 5, characterized in that, A partition wall is concentrically provided on the top surface of the cover body along the inner side of the annular sidewall, and an annular mounting groove is formed between the partition wall and the supporting surface; the check valve includes an annular base, which is installed in the annular mounting groove; an annular embedded wall is provided on the bottom surface of the cover portion of the dispensing component, and the annular embedded wall abuts against the annular base.

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