Bottle cap structure and scented booster bead bottle to improve fragrance delivery

Abstract

This invention belongs to the technical field of packaging for daily necessities, and more particularly to a bottle cap structure and a scented booster bead bottle that improves the delivery of fragrance. [Solution] Multiple first through holes are formed in the upper end wall of the outer cap, and a cylindrical connecting portion extending downward is formed inside the outer cap, with multiple protrusions formed in an annular shape at the bottom of the connecting portion. The inner cap is detachably connected to the outer cap, and multiple second through holes are evenly formed in the upper end wall of the inner cap, with multiple connecting blocks extending upward forming in an annular shape on one side of the second through holes, and a connecting recess for connecting the protrusions is formed on one side of each connecting block. By connecting the protrusions of the connecting portion to the connecting recess of the connecting block of the inner cap, the outer cap and inner cap can be attached and detached, and a press-and-rotate child lock structure is formed.

Description

Technical Field

[0001] The present invention belongs to the technical field of daily necessities packaging, and particularly relates to a bottle cap structure for improving fragrance delivery and a scented booster beads bottle.

Background Art

[0002] Scented booster beads are products commonly used in the field of clothing care, and the fragrance experience is one of the core selling points of scented booster beads. Currently, a bottle structure is adopted as the packaging for commonly available scented booster beads on the market. In order to support users in selecting an appropriate fragrance, a plurality of through holes communicating with the inside of the bottle are formed in the upper part of the bottle cap. Thereby, when the user approaches the bottle cap, the fragrance of the scented booster beads inside the bottle can be smelled. As described above, the bottle cap structure affects the accuracy of fragrance delivery and the user experience. However, the bottle cap structure for improving fragrance delivery in the prior art has the following technical drawbacks.

[0003] (1) Poor fragrance delivery. In the prior art, most bottle caps for packaging scented booster beads only adopt a single cavity design, and fragrance release is achieved through the upper through holes. Since the fragrance of scented booster beads is composed of small molecules (which are easily volatile and release a fresh fragrance), medium molecules (which have moderate volatility and are responsible for the main fragrance), and large molecules (which have poor volatility and release the tail fragrance), when the fragrance is naturally released, the molecules move randomly and cannot be fully mixed. Therefore, most of the fragrance smelled by the user is the fragrance of small molecules, and there is a 30 - 40% deviation between the fragrance of scented booster beads and the composite fragrance on the actual clothes, and the fragrance characteristics of the product cannot be accurately shown.

[0004] (2) It is not possible to achieve both fragrance release and sealing simultaneously. Conventional scented booster bead packaging has a through-hole in the bottle cap, allowing communication between the inside and outside of the bottle. Therefore, the packaging containing the scented booster beads must be stored in a dry environment. If the packaging containing the scented booster beads is stored in a high-humidity environment for a long time, the scented booster beads may absorb moisture and keck, potentially affecting the effectiveness of the scented booster beads. However, while completely sealing the packaging containing the scented booster beads can solve the moisture problem, it does not allow for fragrance delivery. Users cannot intuitively recognize the fragrance of the scented booster beads before purchasing them, making it impossible to balance fragrance release and sealing.

[0005] (3) Insufficient safety measures for children. Conventional technology employs simple screw or coupling structures as child locks on the bottle caps of scented booster bead packaging, which can be easily opened by young children through force, twisting, or digging, posing a risk of accidental ingestion. [Overview of the project] [Problems that the invention aims to solve]

[0006] To solve the technical problems and shortcomings of conventional technology, the object of the present invention is to provide a bottle cap structure that improves fragrance delivery, thereby solving the problems of conventional packaging for scented booster beads, which are prone to fragrance leakage, have insufficient safety, and cannot achieve fragrance release and sealing simultaneously, efficiently mixing fragrances, forming a child-safe lock structure, and achieving sealing and moisture-proof functions. [Means for solving the problem]

[0007] To solve the aforementioned technical problems, the present invention employs the following technical considerations. The present invention provides a bottle cap structure for improving fragrance delivery, comprising an outer cap and an inner cap. The outer cap has an upper end wall and a side wall, and a plurality of first through holes are formed in the upper end wall of the outer cap. A cylindrical joint extending downward is formed inside the outer cap, and the joint is integrally molded with the outer cap. A plurality of protrusions are formed in an annular shape at the bottom of the joint. The inner cap is detachably coupled to the outer cap, and a plurality of second through holes are evenly formed in the upper end wall of the inner cap. A plurality of connecting blocks extending upward are formed in an annular shape on one side of the second through holes, and a connecting recess for coupling a protruding portion is formed on one side of each connecting block. By coupling the protruding portion of the connecting part to the connecting recess of the connecting block of the inner cap, the outer cap and inner cap can be attached and detached, and a press-and-rotate child lock structure can be formed. An aroma mixing chamber is formed by the internal space of the joint, the upper surface of the upper end wall of the inner cap, and the lower surface of the upper end wall of the outer cap. An airflow turbulence structure is formed on the inner wall of the aroma mixing chamber, and this airflow turbulence structure accelerates and disturbs the airflow of aroma that flows into the aroma mixing chamber through the second through-hole, thereby ensuring that aroma components of different molecular weights are thoroughly mixed. The bottle cap structure further includes a unidirectional ventilated membrane responsible for blocking water vapor and allowing fragrance gases to pass through. The unidirectional ventilated membrane is bonded to the second through-hole of the inner cap, and the edges of the unidirectional ventilated membrane are sealed to the upper end wall of the inner cap, thereby preventing external water vapor from entering the bolt through the second through-hole.

[0008] In an embodiment of the present invention, the airflow turbulence structure includes a plurality of arc-shaped airflow guide plates formed at intervals on the inner circumferential surface of the inner wall of the aroma mixing chamber. The height of the airflow guide plates gradually increases from one side approaching the second through-hole to the other side approaching the first through-hole, and a plurality of uneven turbulence protrusions are formed on the surface of the airflow guide plates.

[0009] In an embodiment of the present invention, a sealing module is further attached to the lower surface of the upper end wall of the inner cap and the air inlet of the aroma mixing chamber. The sealing module can prevent leakage of liquid from inside the bolt by improving the sealing performance between the inner cap and the bottleneck.

[0010] In an embodiment of the present invention, the sealing module includes a first sealing component and a second sealing component, the first sealing component being an annular elastic sealing pad, which is attached to the bottom of the inner cap and is fitted in an interference fit to the inner wall of the bottleneck. When the inner cap is screwed onto the bottleneck, the elastic sealing pad provides static sealing of the end face of the bottleneck. The second sealing component is an annular sealing rib attached to a predetermined position on the lower end face of the joint of the outer cap or on the upper end wall of the inner cap. When the outer cap and inner cap are fully joined, the second sealing component adheres tightly to the outer wall of the inner cap, preventing the fragrance gas from leaking through the gap between the outer cap and the inner cap.

[0011] In an embodiment of the present invention, the second through-hole and the first through-hole constitute the air inlet and air outlet of the aroma mixing chamber.

[0012] In an embodiment of the present invention, the first and second through-holes are formed on the circumference of the upper end walls of the outer cap and inner cap, and the first and second through-holes are formed in a circular, rectangular, or hexagonal shape.

[0013] In embodiments of the present invention, the unidirectional ventilation membrane is an ePTFE membrane, and the unidirectional ventilation membrane is fixed to the lower surface of the upper end wall of the inner cap by a heat-pressure means or an adhesive method.

[0014] In an embodiment of the present invention, the outer diameter of the outer cap gradually decreases from bottom to top, forming a sloping transition surface that allows the outer cap to be easily gripped. Multiple anti-slip patterns are formed on the side wall of the outer cap, distributed in a spiral pattern.

[0015] In an embodiment of the present invention, the inner wall of the inner cap has threads formed on it that connect to the external threads of the bottleneck. The inner cap is made of PETG or polypropylene material.

[0016] The scented booster bead bottle includes the bottle body and the bottle cap structure. [Effects of the Invention]

[0017] The following effects of the present invention can be achieved by the matters of the present invention. 1. The scented booster bead bottle of the present invention has a fragrance mixing chamber and a turbulent flow structure. By pressing the bottle body, the user can increase the air pressure inside the bottle to be greater than the air pressure inside the fragrance mixing chamber, thereby creating rotation and turbulence in the fragrance airflow flowing into the fragrance mixing chamber, which can significantly accelerate the mixing process of fragrance molecules with different volatility. As a result, the fragrance smelled by the user is similar to the actual complex fragrance on clothing. Compared to the natural diffusion method of conventional technology, the present invention greatly improves the uniformity of fragrance component mixing and solves the problem that conventional bottle caps cannot effectively deliver fragrance.

[0018] 2. The present invention employs both a unidirectional ventilation membrane and a multi-layered sealing structure. The unidirectional ventilation membrane ensures that fragrance molecules can pass through smoothly, while physically blocking the passage of water molecules. This prevents the scented booster beads from kecking when stored in a humid environment for a long period of time, and perfectly solves the problem of not being able to simultaneously achieve fragrance release and moisture protection for the scented booster beads.

[0019] 3. To solve the problem that the safety of children cannot be thoroughly ensured, the present invention provides a press and rotation child lock structure. When it is necessary to open the outer cap, the user applies a downward pressing force to the outer cap and rotates the outer cap in a predetermined direction to take out the protruding portion of the coupling portion coupled to the coupling recess. When performing this operation, since it is necessary to apply a certain force and ensure the coordination of the operation, it can effectively prevent young children from easily opening the lid by simple rotation or searching, and can reduce the risk of accidental ingestion. An adult can realize the separation of the outer cap and the inner cap by performing the pressing operation and the rotation operation with one hand, and can realize both safety and operation convenience at the same time.

Brief Description of the Drawings

[0020] [Figure 1] It is a view showing the whole assembly of the scented booster beads bottle of the present invention. [Figure 2] It is an exploded view showing the bottle cap structure of the present invention. [Figure 3] It is a plan view showing the bottle cap structure of the present invention. [Figure 4] It is a view showing a cross section taken along the A - A plane of FIG. 3. [Figure 5] It is an enlarged view showing the structure of the a portion in FIG. 4. [Figure 6] It is a view showing the structure of the outer cap of the present invention. [Figure 7] It is a view showing the structure of observing the outer cap of the present invention upward. [Figure 8] It is a view showing the structure of the inner cap of the present invention. [Figure 9] It is a view showing the structure of observing the inner cap of the present invention upward.

Modes for Carrying Out the Invention

[0022] It should be noted that in the specification of this invention, the directions or positions defined by terms such as "vertical," "horizontal," "up," "down," "front," "back," "right," "left," "perpendicular," "horizontal," "upper part," "bottom," "inside," and "outside" represent directions or positions on the drawings. They are for illustrative purposes only and do not explicitly indicate or imply a specific direction or position of a device or part. The terms describing positions on the drawings are merely illustrative of the invention and do not limit it. A person skilled in the art can appropriately understand the specific meaning of each term depending on the specific situation.

[0023] In the specification of this invention, the term "multiple" means that it includes one or more matters. The term "multiple" means that it includes two or more matters. The terms "greater than," "less than," and "greater than" do not include the number, while terms such as "greater than or equal to," "less than or equal to," and "within" include the number. Terms such as "first," "second," and "third" distinguish multiple matters and do not explicitly indicate or imply the importance of each matter, the quantity of each matter, or the sequence of technical features.

[0024] The following describes in more detail embodiments of the bottle cap structure and scented booster bead bottle that improve fragrance delivery according to the present invention, with reference to Figures 1 to 9.

[0025] As shown in Figures 2 to 4, the bottle cap structure for improving fragrance delivery according to the present invention consists of an outer cap 1 and an inner cap 2. Six first through holes 11 are evenly formed on the upper part of the outer cap 1, and a cylindrical joint 3 is formed in the center of the inside of the outer cap 1. The inner diameter of the joint 3 is 2 / 3 of the inner diameter of the outer cap 1, the height of the joint 3 is half the height of the outer cap 1, and ten protrusions 31 are formed on the bottom of the joint 3.

[0026] The inner cap 2 is detachably connected to the outer cap 1, and six second through holes 21 are evenly formed in the upper part of the inner cap 2. Ten connecting blocks 4 extending upward are formed on the upper end face of the inner cap 2, and connecting recesses 41 for connecting protrusions 31 are formed on the side surface of each connecting block 4. By connecting the protrusions 31 of the connecting part 3 to the connecting recesses 41 of the connecting blocks 4 of the inner cap 2, the outer cap 1 and inner cap 2 can be attached and detached, and a press-and-rotate child lock mechanism can be formed.

[0027] Specifically, when assembling the outer cap 1 and the inner cap 2, after inserting the inner cap 2 into the outer cap 1, the protruding portion 31 of the connecting portion 3 is connected to the connecting recess 41 of the connecting block 4. At that time, the lower end surface of the connecting portion 3 presses against the edge of the upper end wall portion of the inner cap 2, and a cylindrical fragrance mixing chamber 5 is formed in the internal space of the inner cap 2. An ePTFE (expanded polytetrafluoroethylene) one-way breathable membrane is fixed to the lower surface of the upper end wall portion of the inner cap 2 by a heat-pressure means. The quantity of ePTFE corresponds to the number of second through holes 21, so that the ePTFE can completely cover all of the second through holes 21. As a result, the scented booster beads can be stored in a humid environment for a long period of time, and the kecking of the scented booster beads can be prevented. In other words, the drawback that scented booster beads cannot simultaneously release fragrance and prevent moisture is completely solved.

[0028] The operation of the child lock mechanism is as follows: When the child lock mechanism is in its initial state (locked), the unloaded outer cap 1 can be rotated freely. When the user opens the bottle cap, a downward pressing force and a clockwise rotational force must be applied simultaneously to the child lock mechanism. By applying the pressing force, the protrusion 31 of the coupling part 3 is moved 2 mm downward along the vertical structure of the coupling recess 41, releasing the annular seal rib 82 from being sealed in an interference fit state in the recess of the upper end wall of the inner cap 2. Next, by rotating the outer cap 1 30° clockwise, the protrusion 31 of the coupling part 3 is moved along the horizontal structure of the coupling recess 41 to the final locked position. At this time, the outer cap 1 and inner cap 2 are fixed so as not to move axially, but gas can flow along the communication passage formed by the first through hole 11 and the second through hole 21. When closing the child lock mechanism, it is necessary to rotate it 30° by applying a counterclockwise rotational force. As a result, the protruding portion 31 of the coupling portion 3 returns to the starting point of the vertical structure along the horizontal structure of the coupling recess 41. When the pressing force is released, the coupling portion 3 rises due to its own elastic recovery force, and the protruding portion 31 returns to the initial locked position along the vertical structure of the coupling recess 41, forming a sealed state as the annular seal rib 82 reconnects to the recess of the inner cap 2. When operating the child lock structure, it is necessary to apply a torque of 35N or more and perform a continuous rotation stroke. This effectively prevents children under 5 years old from unlocking it on their own, while ensuring that adults can unlock it with one hand, thus balancing safety and convenience.

[0029] In this embodiment, as shown in Figure 4, the aroma mixing chamber 5 is formed by the internal space of the joint 3, the upper surface of the upper end wall of the inner cap 2, and the lower surface of the upper end wall of the outer cap 1. An airflow turbulence structure is formed on the inner wall of the aroma mixing chamber 5. The airflow turbulence structure accelerates and disturbs the airflow of aroma that flows into the aroma mixing chamber 5 through the second through-hole 21, thereby ensuring that aroma components of different molecular weights are sufficiently mixed.

[0030] Specifically, the turbulent airflow structure includes a plurality of arc-shaped flow guide plates 6 formed at intervals on the inner surface of the inner wall of the aroma mixing chamber 5. The height of the airflow guide plates 6 gradually increases from one side approaching the second through-hole 21 to the other side approaching the first through-hole 11, and a plurality of uneven turbulent protrusions 61 are formed on the surface of the airflow guide plates 6. When the aroma gas enters the aroma mixing chamber through the second through-hole 21, the airflow guide plates 6 guide the gas to form a spiral upward airflow, and the perturbation of the turbulent protrusions 61 can break up tiny air current clusters of the aroma gas. This creates a turbulent state of various aroma components within the mixing chamber, resulting in a more uniform mixing effect.

[0031] There are eight airflow guide plates 6, which are formed at equal intervals on the inner surface of the inner wall of the aroma mixing chamber 5. Eight spiral airflow passages are formed between two adjacent airflow guide plates 6. The thickness of the airflow guide plates 6 gradually increases from the bottom (3 mm thick) facing one side of the inner cap 2 to the top (8 mm thick) facing one side of the outer cap 1. This creates an upwardly sloping guide surface (as shown in Figure 5). The turbulent protrusions 61 formed on the surface of the airflow guide plates 6 are hemispherical structures with a diameter of 1 mm. Twelve turbulent protrusions 61 are evenly formed on each airflow guide plate 6, and the distance between two adjacent turbulent protrusions 61 is 2 mm. This allows for the formation of local vortices when the gas flows, further disturbing the laminar flow state of the airflow.

[0032] When the user wishes to smell the fragrance, the outer cap 1 is pressed and rotated 30° clockwise, moving the protruding portion 31 of the coupling portion 3 along the coupling recess 41 to the locked position. At this time, the outer cap 1 and inner cap 2 are coupled, but airflow can still be ensured. The fragrance gas inside the bolt enters the fragrance mixing chamber 5 via the unidirectional ventilation membrane 7 and the second through-hole 21 due to the pressure difference, and then a spiral upward airflow is formed guided by the airflow guide plate 6. As the fragrance gas flows, it collides with the turbulent projection 61, dividing the fragrance gas into a large number of minute airflow clusters and forming irregular turbulence. This promotes sufficient diffusion and fusion of small, medium, and large molecules of fragrance components in the fragrance mixing chamber 5, and the mixed complex fragrance is released through the first through-hole 11, thereby achieving a fragrance delivery that closely approximates the actual usage effect. When the user does not wish to smell the fragrance, the outer cap 1 is rotated 30° counterclockwise and then released, moving the protruding portion 31 of the joint portion 3 along the joint recess 41 to the locked position. At that time, the annular seal rib 82 adheres tightly to the outer wall of the inner cap 2, cutting off the airflow passage formed between the fragrance mixing chamber 5 and the outside. The one-way ventilation membrane 7 prevents external water vapor from entering the bolt, ensuring that the fragrance booster beads inside the bolt remain in a dry, sealed space.

[0033] In this embodiment, as shown in Figure 7, the bottle cap structure further includes a unidirectional ventilated membrane 7 responsible for blocking water vapor and allowing fragrance gases to pass through, and the unidirectional ventilated membrane 7 is adhered to the upper part of the inner cap 2. By adhering the edge of the unidirectional ventilated membrane 7 to the upper surface of the upper end wall of the inner cap 2 in a sealed state, it is possible to prevent external water vapor from entering the bolt through the second through-hole 21.

[0034] In the examples of the present invention, an ePTFE composite membrane with a thickness of 0.15 mm can be selected as the unidirectional permeable membrane 7. Multiple micropores with a diameter of 0.2-0.5 μm are formed on the surface of the unidirectional permeable membrane 7, and the porosity of the unidirectional permeable membrane 7 can reach 85% or more. This ensures that small aromatic molecules (e.g., linalool, ethyl acetate, etc.) pass through rapidly with a transmittance of 90% or more, while physically blocking water droplets and moisture with a diameter larger than 1 μm, and achieving an air permeability of 500-800 mL / cm². 2 It can be controlled for 24 hours. This enables efficient fragrance delivery and maintains the humidity inside the bottle at 35% or less for an extended period, effectively preventing the fragrance booster beads from absorbing moisture. The one-way ventilation membrane 7 is fixed to the upper end wall of the inner cap 2 by applying a food-grade hot melt adhesive in an annular shape. This seals the periphery of the one-way ventilation membrane 7 and the surface of the inner cap 2 so that there are no gaps, preventing fragrance gas from leaking out from the periphery of the one-way ventilation membrane 7 or moisture from entering the periphery of the one-way ventilation membrane 7.

[0035] The operating principle of the unidirectional ventilation membrane 7 is based on the elasticity of the membrane 7 and the pressure difference of the air. When air applies pressure to one side of the unidirectional ventilation membrane 7, the membrane 7 opens, allowing air to pass through. When air flows in the opposite direction, the unidirectional ventilation membrane 7 turns off due to the pressure difference, preventing air from flowing in the opposite direction. In this way, the unidirectional ventilation membrane 7 can effectively control the direction of airflow and prevent backflow of air.

[0036] In this embodiment, as shown in Figures 6 and 7, a sealing module 8 is further attached to the lower surface of the upper end wall of the inner cap 2 and the air inlet of the aroma mixing chamber 5. The sealing module 8 can prevent leakage of liquid inside the bolt by improving the sealing performance between the inner cap 2 and the bottleneck. The sealing module 8 includes a first sealing component and a second sealing component, the first sealing component being an annular elastic sealing pad 81. The elastic sealing pad 81 is attached to the bottom of the inner cap 2 and to the inner wall of the bottleneck in an interference fit state. When the inner cap 2 is screwed onto the bottleneck, the elastic sealing pad 81 can achieve static sealing of the end face of the bottleneck. The second sealing component is an annular sealing rib 82 attached to a predetermined position on the lower end surface of the joint 3 of the outer cap 1 or on the upper end wall of the inner cap 2. When the outer cap 1 and the inner cap 2 are completely joined, the second sealing component (annular sealing rib 82) adheres tightly to the outer wall of the inner cap 2, thereby preventing the aroma gas from leaking through the gap between the outer cap 1 and the inner cap 2.

[0037] Specifically, the first sealing component is manufactured from food-grade silicone rubber with a Shore hardness of 60. The first sealing component has an inverted V-shaped cross-section, a thickness of 2 mm, and an inner diameter 0.5 mm smaller than the outer diameter of the bottleneck. When assembling the inner cap 2, rotation of the inner cap 2 applies diametrical pressure to the first sealing component. This ensures that the first sealing component makes tight contact with the inner wall of the bottleneck and the base surface of the bottom of the inner cap 2, thereby forming the first radial sealing structure. The second sealing component is an annular sealing rib 82 integrally molded onto the lower end surface of the joint 3 of the outer cap 1. The annular sealing rib 82 has a semicircular cross-section and is manufactured from high-density polyethylene. When the outer cap 1 and inner cap 2 are locked together, the annular sealing rib 82 is interlocked into an annular recess on the upper surface of the upper end wall of the inner cap 2. At that time, the annular seal rib 82, which is made of an elastic material, deforms between the outer cap 1 and the inner cap 2, thereby preventing the fragrance gas from leaking out through the gap between the outer cap 1 and the inner cap 2, and forming an axially sealed structure with the annular seal rib 82 and the unidirectional ventilation membrane 7.

[0038] In this embodiment, as shown in Figure 2, the second through-hole 21 and the first through-hole 11 form the air inlet and air outlet of the aroma mixing chamber 5. The first through-hole 11 and the second through-hole 21 are formed on the circumference of the upper end walls of the outer cap 1 and the inner cap 2, and both the first through-hole 11 and the second through-hole 21 are formed in a circular shape.

[0039] Specifically, the diameters of the first through-holes 11 and the second through-holes 21 are both 2 mm, and the first and second through-holes 11 and 21 are formed circumferentially so as to be offset from each other. That is, by projecting the center of the first through-hole 11 and the center of the adjacent second through-hole 21 onto a horizontal plane, the angle of the projection obtained is 30°, thus avoiding direct collision of airflow. The six first through-holes 11 are arranged concentrically on the upper end wall of the outer cap 1, and the distance between the concentrics of the six first through-holes 11 and the center of the outer cap 1 is 12 mm. The six second through-holes 21 are arranged concentrically on the upper end wall of the inner cap 2, and the distance between the concentrics of the six second through-holes 21 and the center of the inner cap 2 is 10 mm. Since the total area of ​​the second through-holes 21 is smaller than the total area of ​​the first through-holes 11, a slight positive pressure is formed in the aroma mixing chamber 5, allowing the aroma components to be released after being thoroughly mixed.

[0040] In this embodiment, as shown in Figure 6, the outer diameter of the outer cap 1 gradually decreases from bottom to top, forming an inclined transition surface that allows the outer cap 1 to be easily gripped. Multiple anti-slip patterns are formed on the side walls of the outer cap 1, distributed in a spiral pattern.

[0041] Specifically, the overall height of the outer cap 1 is 45 mm, its bottom outer diameter is 38 mm, its top outer diameter is 35 mm, and the inclined transition surface has an inclination angle of 8°. Such a design meets the ergonomic requirement of making the outer cap 1 easy to grip, reduces the contact area between the hand and the outer cap 1, and reduces the residue of fingerprints. An anti-slip pattern is formed from the center to the top of the outer cap 1. By forming the anti-slip pattern in a flower-like shape, the gripping friction force is increased by more than 40%, effectively preventing slippage when screwing on the cap.

[0042] In this embodiment, as shown in Figure 9, a screw thread 22 is formed on the inner wall of the inner cap 2, which connects to the external screw thread of the bottleneck. The inner cap 2 is manufactured from PETG or polypropylene.

[0043] In the example of the present invention, a 3-start trapezoidal screw structure can be used as the screw thread 22. The pitch of the screw thread 22 is 3 mm, the screw angle is 60°, and the screw height is 1.2 mm. By performing knurling on the surface of the screw thread 22 to a depth of 0.2 mm, it is possible to ensure that the screw thread 22 is tightly coupled to the external thread of the bottleneck. The inner cap 2 is manufactured by injection molding of food-grade PETG. Four positioning protrusions are formed on the bottom edge of the inner cap 2, and the four positioning protrusions are evenly formed around the circumference of the bottom of the inner cap 2. By coupling the positioning protrusions with the positioning recesses at the top of the bottleneck, it is possible to ensure that the circumferential positioning accuracy of the inner cap 2 is ≤0.5 mm when the inner cap 2 is attached to the bottleneck, and to avoid tilting of the inner cap 2 when screw coupling.

[0044] The present invention further provides a scented booster bead bottle. As shown in Figure 1, the scented booster bead bottle includes a bolt body 9 and the bottle cap structure.

[0045] Specifically, the bolt body 9 of the scented booster bead bottle is manufactured by blow molding of HDPE material. When the bolt body 9 and the bottle cap structure are used together, a sealed connection can be achieved by connecting the threads of the inner cap 2 to the external threads of the bottle neck. When the user presses the bolt body 9, the air pressure inside the bolt body 9 increases, causing the scent gas to enter the scent mixing chamber 5 through the unidirectional ventilation membrane 7 and the second through-hole 21, where it is mixed by the airflow guide plate 6 and turbulence projection 61 before being released through the first through-hole 11. This ensures efficient scent delivery and effectively prevents the intrusion of external water vapor with a humidity of 90% or more, ensuring that the scented booster beads inside the bottle remain dry and loose during the 36-month storage period.

[0046] The operating principle of this invention is as follows: When the user presses the bottle body 9, the fragrance from the scented booster beads inside the bottle is released by the pressure, passing through the unidirectional ventilation membrane 7 and then entering the fragrance mixing chamber 5 through the second through-hole 21. The airflow entering the fragrance mixing chamber 5 flows upward along the spiral passage guided by the airflow guide plate 6. At this time, the airflow collides with the hemispherical turbulence protrusions 61 formed on the surface of the airflow guide plate 6, dividing the airflow into a large number of minute airflow clusters and forming irregular turbulence. This promotes the sufficient diffusion and fusion of fragrance components of different molecular weights (e.g., small molecule esters, medium molecule alcohols, and large molecule aldehydes) within the fragrance mixing chamber. The mixed composite fragrance airflow is released through the first through-hole 11 formed at the top of the outer cap 1, allowing the user to perceive a rich and evenly distributed fragrance through their sense of smell. When the user releases the bottle body 9, the pressure inside the bottle body 9 decreases, and the unidirectional ventilation membrane 7 automatically closes, preventing external gases and moisture from entering the bottle. The silicone seal ring at the bottom of the inner cap 2 and the annular seal rib 82 at the joint 3 of the outer cap 1 form a double-seal structure, allowing the scented booster beads to be stored for a long time in a sealed structure that ensures dryness and airtightness, effectively preventing fragrance evaporation and kecking due to moisture.

[0047] The press-and-rotate child lock mechanism can be unlocked by applying a certain amount of pressure and rotating it 30° clockwise. This prevents children from accidentally opening the press-and-rotate child lock mechanism and improves the convenience of one-handed operation for adults. This structural design ensures efficient fragrance delivery, safety during use, and storage stability.

[0048] It should be noted that the specific embodiments of the present invention are merely preferred embodiments, and there is no intention to limit the scope of the present invention by such specific embodiments. In the specific embodiments of the present invention, unless otherwise specified, the same reference numerals are used to denote the same parts. That is, although the technical features of the present invention have been described in detail by the embodiments of the present invention, these embodiments are merely illustrative of the present invention, and the present invention is not limited to the configuration of the embodiments. Persons skilled in the art may modify, substitute, etc., the structure, shape, and principle without departing from the spirit of the present invention, and such modifications will of course still be included within the scope of the claims of the present invention. [Explanation of symbols]

[0049] 1 Outer cap 11 First through hole 2 Inner cap 21 Second through hole 22 threads 3 Joint part 31 Protrusion 4 Combined mass 41 Joint recess 5. Aroma Mixing Room 6. Airflow Information Board 61 Turbulence protrusion 7. Unidirectional ventilation membrane 8 sealed modules 81 Elastic sealing pad 82 Annular seal rib 9 Bottle body

Claims

1. A bottle cap structure that improves fragrance delivery, including an outer cap and an inner cap, The outer cap comprises an upper end wall and side walls, the upper end wall of the outer cap has a plurality of first through holes, and a cylindrical connecting portion extending downward is formed inside the outer cap, the connecting portion is integrally molded with the outer cap, and a plurality of protrusions are formed in an annular shape at the bottom of the connecting portion. The inner cap is detachably coupled to the outer cap, and a plurality of second through holes are evenly formed in the upper end wall of the inner cap. A plurality of connecting blocks extending upward are formed in an annular shape on one side of the second through holes, and a connecting recess for connecting a protruding portion is formed on one side of each connecting block. By connecting the protruding portion of the connecting portion to the connecting recess of the connecting block of the inner cap, the outer cap and inner cap can be attached and detached, and a press-and-rotate child lock structure is formed. An aroma mixing chamber is formed by the internal space of the joint, the upper surface of the upper end wall of the inner cap, and the lower surface of the upper end wall of the outer cap. An airflow turbulence structure is formed on the inner wall of the aroma mixing chamber. This airflow turbulence structure accelerates and disturbs the airflow of aromas that flow into the aroma mixing chamber through the second through-hole, thereby ensuring that aroma components of different molecular weights are thoroughly mixed. The bottle cap structure further includes an ePTFE film responsible for blocking water vapor and allowing fragrance gases to pass through, wherein the ePTFE film is bonded to a second through-hole of the inner cap, and the edge of the ePTFE film is sealed to the upper end wall of the inner cap, thereby preventing external water vapor from entering the bolt through the second through-hole, thus improving fragrance delivery.

2. The bottle cap structure for improving fragrance delivery according to claim 1, characterized in that the airflow turbulence structure includes a plurality of arc-shaped airflow guide plates formed at intervals on the inner surface of the inner wall of the fragrance mixing chamber, and a plurality of uneven turbulence protrusions are formed on the surface of the airflow guide plates.

3. The bottle cap structure for improving fragrance delivery according to claim 1, characterized in that a sealing module is further attached to the lower surface of the upper end wall portion of the inner cap and the air inlet of the fragrance mixing chamber.

4. The aforementioned sealed module includes a first sealed component and a second sealed component. The first sealing component is an annular elastic sealing pad, which is attached to the bottom of the inner cap and is also fitted in an interference fit to the inner wall of the bottleneck, and when the inner cap is screwed onto the bottleneck, the elastic sealing pad provides static sealing of the end face of the bottleneck. The second sealing component is an annular sealing rib attached to a predetermined position on the lower end surface of the joint portion of the outer cap or on the upper end wall portion of the inner cap, and when the outer cap and the inner cap are completely joined, the second sealing component adheres tightly to the outer wall portion of the inner cap, thereby preventing the fragrance gas from leaking out through the gap between the outer cap and the inner cap, as described in claim 3, for improving fragrance delivery.

5. The bottle cap structure for improving fragrance delivery according to claim 1, characterized in that the second through-hole and the first through-hole constitute an air inlet and an air outlet for the fragrance mixing chamber.

6. The bottle cap structure for improving fragrance delivery according to claim 1, characterized in that the first and second through-holes are formed on the circumference of the upper end walls of the outer cap and inner cap, and the first and second through-holes are formed in a circular, rectangular, or hexagonal shape.

7. The bottle cap structure for improving fragrance delivery according to Claim 1, characterized in that the ePTFE film is fixed to the lower surface of the upper end wall of the inner cap by a heat-pressure means or an adhesive method.

8. The bottle cap structure for improving fragrance delivery according to claim 1, characterized in that the outer diameter of the outer cap gradually decreases from bottom to top, forming an inclined transition surface that allows the outer cap to be easily gripped, and a plurality of spirally distributed anti-slip patterns are formed on the side wall of the outer cap.

9. The bottle cap structure for improving fragrance delivery according to claim 1, characterized in that the inner wall of the inner cap has threads formed on it that connect to the external threads of the bottle neck, and the inner cap is made of PETG or polypropylene material.

10. A scented booster bead bottle characterized by comprising a bolt body and a bottle cap structure according to any one of claims 1 to 9.

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