Sealing leakage-proof cosmetic bottle cap
The sealing design of the rubber stopper and the hemispherical protrusion and the cam track clamping solves the problem of sealing failure of the cosmetic bottle cap under external force impact and temperature changes, and achieves reliable sealing and stable storage of cosmetics.
Patent Information
- Application Number
- CN202422778171.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-14
AI Technical Summary
Existing cosmetic bottle caps are prone to sealing failure under long-term use or external force impact, temperature changes, etc., causing cosmetics to leak, especially when tilted or inverted, they cannot effectively prevent cosmetics from seeping out, affecting the use effect and safety.
The rubber stopper fits tightly with the inner wall of the bottle body, and a hemispherical protrusion is set on the surface to fill the gap. The lifting movement of the inner bottle cap is achieved by the clamping connection between the cam and the cam track. Combined with the threaded connection of the inner and outer bottle caps, the sealing effect is enhanced.
Effectively prevent cosmetics from leaking under various circumstances, improve sealing and stability, ensure the quality and usage experience of cosmetics, and extend the service life of the bottle cap.
Smart Images
Figure CN223479770U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cosmetic packaging, and in particular to a leak-proof cosmetic bottle cap. Background Technology
[0002] With the booming development of the cosmetics industry, consumers' demands for cosmetic quality are increasing. The preservation quality of cosmetics directly affects their effectiveness and safety, and the bottle cap, as a key sealing component of cosmetic bottles, is crucial for maintaining the stability of cosmetics. Consumers expect cosmetics to remain intact under various environmental conditions, such as during travel and daily carrying, without leakage or contamination caused by poor cap sealing. Therefore, there is a strong market demand for cosmetic bottle caps with highly efficient sealing and leak-proof functions. However, existing cosmetic bottle cap technologies mainly rely on simple threaded connections and gasket seals. However, this method is prone to seal failure under long-term use or exposure to external impacts and temperature changes. In other words, ordinary gaskets may wear and deform after repeated opening and closing of the cap, leading to a poor seal. Moreover, when some cosmetic bottles are inverted or tilted, simple threads and gasket seals alone cannot effectively prevent cosmetics from leaking from the bottle opening. In addition, in high-temperature environments, cosmetics may expand, exerting significant pressure on the bottle cap; in low-temperature environments, the material may shrink, affecting the fit between the cap and the bottle opening, easily leading to leakage and affecting the quality of the cosmetics and the user experience. Utility Model Content
[0003] (1) Technical problems solved
[0004] In view of the limitations of existing cosmetic bottle caps, the purpose of this utility model is to provide a leak-proof cosmetic bottle cap. The rubber stopper can fit tightly against the inner wall of the bottle, forming the first line of defense for sealing. When the cap is on the bottle, the rubber stopper can completely fill the gap between the bottle and the cap, ensuring the airtightness of the cosmetics inside the bottle during storage and transportation. Its surface is evenly provided with several first hemispherical protrusions, which can further fill any tiny gaps that may exist between the rubber stopper and the inner wall of the bottle when they come into contact, making the seal even tighter and greatly improving the leak-proof effect, preventing cosmetics from seeping out from these tiny gaps. Furthermore, the inner and outer caps are rotatably connected by a cam and cam track, which not only makes opening and closing the cap more convenient but also helps to enhance the sealing effect. When the cap is closed, the inner cap can be tightly pressed against the bottle under the action of the cam and cam track, making the seal between the rubber stopper and the inner wall of the bottle more stable and preventing leakage problems caused by loosening or expansion of the cap.
[0005] (2) Technical solution
[0006] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof cosmetic bottle cap, comprising an inner cap and an outer cap rotatably connected to the inner cap. Several cam tracks are arranged around the inner wall of the outer cap, gradually sloping upwards from the bottom of the cap to near the top. Several cams are fixedly connected to the bottom of the inner cap, with the other end of each cam engaging with a cam track. A rubber stopper is fixedly connected to the bottom of the inner cap, and the surface of the rubber stopper is evenly provided with several first hemispherical protrusions. These cam tracks are arranged around the inner wall of the outer cap, and the tracks are inclined to accommodate the clockwise and counterclockwise rotation of the cap. These cam tracks form a vortex-like shape, gradually sloping upwards from the bottom of the cap to near the top. Simultaneously, several corresponding cams are fixedly connected to the bottom of the inner cap, with the other end of each cam engaging with a corresponding cam track. When the outer cap is rotated, the cams move along the cam tracks. Because the cam tracks are inclined, this movement can be converted into the up-and-down movement of the inner cap. Specifically, when the outer bottle cap is rotated counterclockwise, the rotation causes the cam track to rotate counterclockwise as well. The cam then tilts upwards within the cam track, lifting the inner bottle cap. Conversely, when the outer bottle cap rotates clockwise, the cam moves downwards along the cam track, causing the inner bottle cap to return to its original position, flush with the outer bottle cap. This ingenious design utilizes the cooperation between the cam and the cam track to achieve the lifting and lowering function of the inner bottle cap relative to the outer bottle cap.
[0007] The rubber stopper, fixed to the bottom of the inner bottle cap, is made of a material with good elasticity and sealing properties. When the inner bottle cap is in place, the rubber stopper fits perfectly into the bottle opening. Several hemispherical protrusions are evenly distributed on the surface of the rubber stopper. When the bottle cap contacts the bottle opening, the rubber stopper is compressed by the opening, and the hemispherical protrusions effectively fill any tiny gaps between the bottle opening and the cap, thus forming a tight seal. Even under external force, temperature changes causing pressure changes inside the bottle, or the cosmetic bottle being tilted or inverted, the combination of the rubber stopper and the hemispherical protrusions effectively prevents cosmetics from leaking from the bottle opening. The height of the hemispherical protrusions on the surface of the rubber stopper is between 1-3 mm.
[0008] It should be noted that the cam and the cam track are clearance fit, with a clearance range of 0.1-0.5mm.
[0009] Preferably, the inner bottle cap and the outer bottle cap are concentrically arranged, that is, the center of the inner bottle cap and the center of the outer bottle cap are the same, and the inner bottle cap moves up and down in the vertical direction.
[0010] Preferably, the inner wall of the outer bottle cap has internal threads that correspond to the external threads of the bottle body. Several second hemispherical protrusions are provided between the internal threads. The height of the second hemispherical protrusions is between 0.5mm and 2mm. The internal threads of the outer bottle cap and the external threads of the bottle body cooperate to connect the bottle cap and the bottle body.
[0011] Preferably, the outer diameter of the rubber stopper is equal to the inner diameter of the bottle body. During the capping process, the rubber stopper and the inner circumference of the bottle body form a tight circumferential fit. Every contact between the surface of the rubber stopper and the inner circumference of the bottle body is part of the sealing barrier.
[0012] Preferably, a lubricating oil filling device is fixedly connected to the inner wall of the top of the cam track. The lubricating oil filling device is embedded in the inner wall space of the top of the cam track, without affecting the normal movement of the cam within the track. The lubricating oil filling device is a small storage container whose shape conforms to the contour of the inner wall of the top of the cam track. This device is firmly fixed to the inner wall of the top of the cam track by welding, ensuring that it will not loosen or shift during use. The lubricating oil filling device is equipped with a small pressure-sensing or mechanical triggering mechanism. When the cam moves upward and applies a certain pressure or triggers a specific component, the device slowly and evenly releases lubricating oil onto the cam track. In this way, the lubricating oil can flow downward along the surface of the cam track, forming a uniform lubricating film between the cam and the cam track. The specific setup and connection method are conventional techniques and therefore will not be described in detail.
[0013] (III) Beneficial Effects
[0014] (1) The rubber stopper fits tightly against the inner wall of the bottle, forming the first line of defense for sealing. When the cap is on the bottle, the rubber stopper completely fills the gap between the bottle and the cap, ensuring the airtightness of the cosmetics inside during storage and transportation. Its surface is evenly covered with several hemispherical protrusions, which further fill any tiny gaps that may exist between the rubber stopper and the inner wall of the bottle, making the seal even tighter and greatly improving the leak-proof effect, preventing cosmetics from seeping out from these tiny gaps. Furthermore, the inner and outer caps are rotatably connected by a cam and cam track, making it easier to open and close the cap and also enhancing the sealing effect. When the cap is closed, the inner cap is pressed tightly against the bottle under the action of the cam and cam track, making the seal between the rubber stopper and the inner wall of the bottle more stable and preventing leakage caused by a loose or bulging cap. Attached Figure Description
[0015] Figure 1 This is a structural diagram of the present utility model;
[0016] Figure 2This is a schematic diagram of the inner bottle cap structure in this utility model;
[0017] Figure 3 This is a schematic diagram of the structure of the outer and inner bottle caps in this utility model;
[0018] Figure 4 This is a schematic diagram of the cam and cam track in this utility model.
[0019] In the diagram: 1-inner cap, 2-outer cap, 21-internal thread, 22-second hemispherical protrusion, 3-cam track, 4-cam, 5-rubber stopper, 50-first hemispherical protrusion, 6-lubricating oil filling device. Detailed Implementation
[0020] The following will refer to the appendix in the embodiments of this utility model. Figure 1 -Appendix Figure 4 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0021] Example 1: As Figure 1 As shown, the first specific embodiment of this utility model provides a leak-proof cosmetic bottle cap, including an inner cap 1 and an outer cap 2 rotatably connected to the inner cap 1. Several cam tracks 3 are arranged around the inner wall of the outer cap 2, gradually sloping upwards from the bottom of the cap to near the top. Several cams 4 are fixedly connected to the bottom of the inner cap 1, with the other end of each cam 4 engaging with a cam track 3. A rubber stopper 5 is fixedly connected to the bottom of the inner cap 1. Several first hemispherical protrusions 50 are evenly distributed on the surface of the rubber stopper 5. The rubber stopper 5 itself has good elasticity and plasticity, enabling it to fit tightly against the bottle opening, forming the first line of defense for sealing. The several first hemispherical protrusions 50 evenly distributed on its surface are moderately squeezed and deformed when the cap contacts the bottle opening, thereby better filling the tiny gaps between the bottle opening and the rubber stopper, further enhancing the sealing effect. Even when the cosmetic bottle is shaken, tilted, or inverted, it can effectively prevent cosmetics from leaking from the bottle opening, ensuring the sealing and quality stability of the cosmetics. Whether it's liquid cosmetics like toners and perfumes, or thicker cosmetics like lotions and creams, this sealing structure provides a reliable seal. For liquid cosmetics, it prevents leakage due to their high fluidity; for cream cosmetics, it prevents residue from drying and hardening at the bottle opening, affecting future use and the sealing effect.
[0022] The inner and outer caps are concentrically designed. This concentric design ensures that the rubber stopper experiences uniform force along the circumference of the bottle opening, guaranteeing a uniform sealing pressure distribution between the stopper and the bottle opening. Regardless of the viewing angle, the seal between the cap and the bottle opening remains consistent, eliminating localized leaks caused by eccentricity. This effectively prevents cosmetics from leaking from any point on the bottle opening, improving the reliability and stability of the seal. During the rotation of the outer cap, which drives the inner cap to rise and fall, the concentric design ensures the inner cap rises or falls smoothly along a direction perpendicular to the bottle opening plane. The cam's movement trajectory within the cam track is more stable and predictable, preventing tilting, wobbling, or jamming of the inner cap due to eccentricity. This allows the inner cap to accurately reach its intended position, ensuring smooth and precise operation whether raising it to retrieve cosmetics or lowering it to restore the seal. Furthermore, the concentric structure maintains a balance of forces on all parts of the inner cap during raising and lowering. When the inner cap is raised, the force from the cam track on the cam can be evenly transmitted to all parts of the inner cap, avoiding additional stress concentration caused by uneven force distribution, thereby reducing the risk of damage to the inner cap and related components and extending the service life of the cap.
[0023] The inner wall of the outer cap 2 is provided with internal threads 21, which correspond to the external threads of the bottle body. Several second hemispherical protrusions 22 are provided between the internal threads 21. The interaction between the internal threads and the external threads of the bottle body forms the first line of defense, effectively preventing cosmetics from leaking from the threaded connection between the bottle mouth and the cap. The second hemispherical protrusions between the internal threads further enhance the sealing effect. When the cap is tightened, these protrusions tightly press against the external threads of the bottle body, filling the tiny gaps between the threads and forming a second line of defense. This greatly improves the overall sealing reliability of the cap, better maintaining the seal of the cosmetics even under pressure changes or external shaking. The second hemispherical protrusions increase the friction between the internal threads and the external threads of the bottle body. During daily use, carrying, or transportation of the cosmetic bottle, even under external forces such as vibration and shaking, the cap is less likely to loosen and fail to seal. This increased friction allows the cap to be more firmly fixed to the bottle body, maintaining a tight connection between the cap and the bottle body, ensuring the safe storage of cosmetics.
[0024] The outer diameter of the rubber stopper 5 is equal to the inner diameter of the bottle body. When the outer diameter of the rubber stopper 5 is exactly equal to the inner diameter of the bottle body, the rubber stopper can achieve a tight fit with the inner ring of the bottle body from all directions, forming a continuous and seamless sealing interface. This tight fit can effectively prevent cosmetics from leaking from any tiny gap between the bottle opening and the rubber stopper. Whether the cosmetic bottle is upright, tilted, or inverted, it can ensure that the cosmetics are firmly sealed inside the bottle, greatly improving the reliability and stability of the seal. Furthermore, for cosmetics of different textures, such as liquids, lotions, and creams, this equal diameter design can provide excellent sealing effects, thereby ensuring the cleanliness of the bottle opening and a good sealing state each time it is used, extending the shelf life and effectiveness of the cosmetics.
[0025] A lubricating oil filling device 6 is fixedly connected to the inner wall of the top of the cam track 3. The lubricating oil filling device 6 can continuously provide an appropriate amount of lubricating oil between the cam 4 and the cam track 3, forming a uniform lubricating film, effectively reducing the coefficient of friction between the two, making the movement of the cam 4 smoother, thereby reducing the resistance when the inner cap 1 is raised and lowered. Users will feel more relaxed and effortless when rotating the outer cap 2, improving the convenience and comfort of use. In the long-term frequent use, even after multiple raising and lowering operations of the inner cap 1, the cam and cam track are not prone to surface wear, deformation or damage, reducing the risk of functional failure of the cap due to component wear, thereby improving the durability and reliability of the entire cosmetic bottle cap.
[0026] Working principle: When the outer cap 2 is rotated counterclockwise, the rotation of the outer cap 2 will cause several cam tracks 3 on its inner wall to rotate counterclockwise. The cams 4 at the bottom of the inner cap 1 engage with the cam tracks 3 one by one, so the cams 4 will move along the inclined direction of the cam tracks 3, and the inner cap 1 will rise. When the outer cap 2 is rotated clockwise, the cams 4 move towards the bottom of the cap in the cam tracks 3, causing the inner cap 1 to fall. After the inner cap 1 falls, it will cause the rubber stopper 5 to move downward and enter the bottle body. When the inner cap 1 and the outer cap 2 are in the cylinder chamber, the rubber stopper 5 is in close contact with the inner ring of the bottle body. At this time, several first hemispherical protrusions 50 evenly arranged on the surface of the rubber stopper 5 are in close contact with the inner wall of the bottle body. The internal threads 21 of the inner wall of the outer cap 2 correspond to the external threads of the bottle body. During the tightening of the cap, the threads interlock to achieve initial connection and sealing. At the same time, several second hemispherical protrusions 22 arranged between the internal threads 21 increase the friction and sealing between the threads.
[0027] As the cam 4 moves along the cam track 3, when the cam 4 approaches or reaches the top of the cam track 3, it will trigger the operation of the lubricating oil filling device 6 to fill the space between the cam 4 and the cam track 3 with lubricating oil.
Claims
1. A leak-proof cosmetic bottle cap, comprising an inner cap (1) and an outer cap (2) rotatably connected to the inner cap (1), characterized in that, The outer bottle cap (2) has several cam tracks (3) arranged around its inner wall. The cam tracks (3) gradually slope upward from the bottom of the bottle cap to near the top. The bottom of the inner bottle cap (1) is fixedly connected to several cams (4). The other end of each cam (4) is engaged with the cam track (3). The bottom of the inner bottle cap (1) is fixedly connected to a rubber stopper (5). The surface of the rubber stopper (5) is evenly provided with several first hemispherical protrusions (50).
2. The sealing and leak-proof cosmetic bottle cap according to claim 1, characterized in that, The inner bottle cap (1) and the outer bottle cap (2) are concentrically arranged.
3. The sealing and leak-proof cosmetic bottle cap according to claim 1, characterized in that, The inner wall of the outer bottle cap (2) is provided with an internal thread (21), which corresponds to the external thread of the bottle body, and a plurality of second hemispherical protrusions (22) are provided between the internal threads (21).
4. The sealing and leak-proof cosmetic bottle cap according to claim 1, characterized in that, The outer diameter of the rubber stopper (5) is equal to the inner diameter of the bottle body.
5. A leak-proof cosmetic bottle cap according to claim 1, characterized in that, A lubricating oil filling device (6) is fixedly connected to the inner wall of the top end of the cam track (3).