Leakage-proof eyeliner
By employing locking components, sealing structures, and elastic airbag designs in liquid eyeliner pens, the leakage problem caused by air pressure changes and tilting is solved, achieving higher sealing performance and ink uniformity, and improving stability and practicality in use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI AYARA COSMETICS CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-05-05
AI Technical Summary
Existing liquid eyeliners are prone to leakage from the tip or connection point during use or storage due to changes in air pressure, temperature, or tilting of the pen body, which affects the user experience and may cause waste and pollution.
The pen uses a locking assembly in conjunction with a conical bottom sealing ring and a sealing rubber ring, along with an elastic airbag and a negative pressure slider, to improve the pen's sealing performance and ink uniformity, and reduce leakage.
It effectively reduces leakage of liquid eyeliner, improves stability and usability, prevents contamination, and enhances the user experience.
Smart Images
Figure CN224193096U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of eyeliner technology, and in particular to a leak-proof eyeliner. Background Technology
[0002] Eyeliner, as an important makeup tool, is widely used in everyday makeup and stage styling to outline the eyes and enhance their contours and brightness. With the rapid development of the cosmetics industry, the types and functions of eyeliners have become increasingly diverse, from traditional pencil eyeliners to liquid eyeliners and gel eyeliners, meeting users' needs for diverse makeup looks. However, during use, the leakage problem of eyeliners has gradually become a focus of user concern, especially with liquid eyeliners. Leakage not only affects the user experience but may also stain makeup bags or clothing, causing considerable inconvenience.
[0003] Currently, eyeliners on the market primarily focus on smooth writing, color saturation, and longevity. Liquid eyeliners deliver liquid pigment to the tip via capillary action, providing precise and smooth lines; however, their seal at the tip-lead connection is often poor, making them prone to leakage due to pressure changes or improper use. Pencil-style eyeliners, while simple in structure and less prone to leakage, suffer from lower color saturation and longer-lasting wear. Furthermore, some high-end eyeliners employ automatic retractable leads or press-type designs, improving ease of use but not completely eliminating the leakage problem. Existing leak-proof designs largely rely on the seal of the cap, but over time, the cap may loosen or wear, leading to seal failure.
[0004] Despite significant advancements in writing performance and color accuracy of current eyeliners, leakage remains a persistent problem. During use or storage, liquid eyeliners often leak from the tip or connector due to changes in air pressure, temperature, or tilting of the pen, affecting the user experience and potentially causing waste and contamination. Utility Model Content
[0005] The purpose of this application is to solve the problem that liquid eyeliner often leaks from the tip or connection point during use or storage due to changes in air pressure, temperature, or tilting of the pen body, which not only affects the user experience but may also cause waste and pollution. This application provides a leak-proof eyeliner.
[0006] To achieve the above objectives, this application specifically adopts the following technical solution:
[0007] A leak-proof eyeliner includes a pen barrel with a conical tip sleeve threaded to its bottom. The bottom of the conical tip sleeve has an ink outlet. A positioning ring is inserted inside the pen barrel, and an ink guide core is fixedly connected to one end of the positioning ring. One end of the ink guide core passes through the positioning ring and extends into the conical tip sleeve. A pen tip is fixedly connected to the bottom of the ink guide core, and one end of the pen tip passes through the ink outlet and extends out of the conical tip sleeve. A sealing groove is formed at the inner bottom of the pen barrel. A conical bottom sealing ring adapted to the sealing groove is fixedly connected to the bottom of the positioning ring. A pair of sealing rubber rings are fixedly connected inside the sealing groove. One end of the conical bottom sealing ring is embedded between the two sealing rubber rings. A limiting ring plate is fixedly connected inside the pen barrel, and the positioning ring is installed between the limiting ring plate and the sealing groove. A locking assembly is installed at one end of the ink guide core.
[0008] By adopting the above technical solution, and by setting the locking component in conjunction with the conical bottom sealing ring and the sealing rubber ring, the locking component can rebound to push out the ink guide core, and the ink guide core can drive the positioning ring to push the conical bottom sealing ring into the sealing groove. This causes the conical bottom sealing ring to compress the sealing rubber ring and deform it. At the same time, the deformed sealing rubber ring fills the space between the sealing groove and the conical bottom sealing ring, thereby effectively improving the sealing performance between the pen barrel and the positioning ring and reducing ink leakage.
[0009] Furthermore, the locking assembly includes a bottom support ring plate fixedly connected to one end of the ink guide core. The bottom support ring plate is installed below the positioning ring. A locking rubber ring is fixedly connected to the top of the bottom support ring plate. The locking rubber ring is sleeved around the ink guide core. A locking inner groove is opened at the inner bottom of the pen barrel. The bottom support ring plate and the locking rubber ring are installed inside the locking inner groove.
[0010] By adopting the above technical solution, and by setting the locking rubber ring and the bottom support ring plate to work together, the elasticity of the locking rubber ring is utilized to push the bottom support ring plate to move the positioning ring along the length of the ink guide core, and to drive the conical bottom sealing ring to embed into the sealing groove, so as to maintain the stability of the conical bottom sealing ring inserted into the sealing groove, and further improve the sealing effect of the device.
[0011] Furthermore, a support cylinder is fixedly connected inside the conical sleeve, and an ink storage chamber is formed between the conical sleeve and the support cylinder. A pair of overflow prevention holes communicating with the ink storage chamber are symmetrically opened at one end of the support cylinder.
[0012] By adopting the above technical solution, and by using the anti-overflow hole in conjunction with the ink storage tank, when a large amount of ink leaks out from inside the ink guide core, the ink can flow through the anti-overflow hole into the ink storage tank for accumulation, and then be guided into the ink guide core for use through the anti-overflow hole. This effectively reduces ink leakage and improves the practicality of the device.
[0013] Furthermore, an elastic airbag is fixedly connected inside the pen barrel.
[0014] By adopting the above technical solution, and by setting an elastic airbag to expand or contract in response to changes in the internal air pressure of the pen barrel, the internal air pressure of the pen barrel is balanced, thereby reducing ink leakage inside the pen barrel and improving the practicality of the device.
[0015] Furthermore, a negative pressure slider is inserted inside the pen barrel, and a negative pressure rubber ring is fixedly sleeved around the negative pressure slider. The negative pressure rubber ring abuts against the inner wall of the pen barrel, and a vent hole is opened at the top of the pen barrel.
[0016] By adopting the above technical solution, and by setting up the cooperation between the negative pressure slider and the negative pressure rubber ring, the negative pressure slider forms a sliding seal contact with the pen barrel through the negative pressure rubber ring. In conjunction with the air pressure change inside the pen barrel, the negative pressure slider is pushed to always be in contact with the ink level inside the pen barrel, and the ink is pushed to always be in contact with the ink guide core. This facilitates the improvement of the ink output uniformity of the ink guide core and reduces the occurrence of uneven ink output in the device.
[0017] Furthermore, the negative pressure slider has a weight reduction chamber inside.
[0018] By adopting the above technical solution, and by using the combination of a weight-reducing chamber and a negative pressure slider, the weight of the negative pressure slider is effectively reduced, thereby improving the sliding efficiency and stability of the negative pressure slider inside the pen barrel.
[0019] Furthermore, a T-shaped rubber plug is inserted inside the vent hole, and the T-shaped rubber plug has multiple fine holes evenly distributed inside.
[0020] By adopting the above technical solution, and by using a T-shaped rubber plug in conjunction with a fine hole, it is easy to intercept and filter the gas that enters the pen barrel through the vent hole, thereby reducing the entry of solid foreign objects into the pen barrel and affecting the internal sealing of the pen barrel.
[0021] Furthermore, one end of the pen barrel is symmetrically and fixedly connected with rubber pads.
[0022] By adopting the above technical solution and using a rubber pad in conjunction with the pen barrel, the friction between the pen barrel gripping end and the hand is effectively increased, thus improving the stability of the pen barrel during use.
[0023] In summary, this application includes at least one of the following beneficial effects:
[0024] 1. By using a locking assembly in conjunction with a conical bottom sealing ring and a sealing rubber ring, the locking assembly can spring back and push out the ink guide core. This allows the ink guide core to drive the positioning ring, which in turn pushes the conical bottom sealing ring into the sealing groove. This causes the conical bottom sealing ring to compress the sealing rubber ring, resulting in deformation. Simultaneously, the deformed sealing rubber ring fills the space between the sealing groove and the conical bottom sealing ring, effectively improving the seal between the pen barrel and the positioning ring and reducing ink leakage.
[0025] 2. By using a negative pressure slider and a negative pressure rubber ring together, the negative pressure slider forms a sliding seal with the pen barrel through the negative pressure rubber ring. Combined with the changes in air pressure inside the pen barrel, the negative pressure slider is pushed to always be in contact with the ink level inside the pen barrel, and the ink is always in contact with the ink guide core. This improves the uniformity of ink output from the ink guide core and reduces the occurrence of uneven ink output in the device. Attached Figure Description
[0026] Figure 1 This is a three-dimensional structural diagram of the main body of the device in this application.
[0027] Figure 2 This is a cross-sectional view of the internal structure of the pen barrel in this application.
[0028] Figure 3 This is an exploded view of the internal structure of the pen barrel in this application.
[0029] Explanation of reference numerals in the attached figures:
[0030] 1. Pen barrel; 2. Conical tip sleeve; 3. Ink outlet; 4. Positioning ring; 5. Ink guide core; 6. Pen tip; 7. Sealing groove; 8. Conical bottom sealing ring; 9. Sealing rubber ring; 10. Bottom support ring plate; 11. Locking rubber ring; 12. Locking inner groove; 13. Support cylinder; 14. Overflow hole; 15. Limiting ring plate; 16. Elastic airbag; 17. Negative pressure slider; 18. Negative pressure rubber ring; 19. Weight reduction chamber; 20. T-shaped rubber plug; 21. Fine hole; 22. Rubber gasket. Detailed Implementation
[0031] The following is in conjunction with the appendix Figure 1 —3 provides further detailed description of this application.
[0032] This application discloses a leak-proof eyeliner.
[0033] Reference Figure 1 - Figure 3A leak-proof eyeliner pen includes a pen barrel 1, a conical tip sleeve 2 threadedly connected to the bottom of the pen barrel 1, an ink outlet 3 at the bottom of the conical tip sleeve 2, a positioning ring 4 inserted inside the pen barrel 1, an ink guide core 5 fixedly connected to one end of the positioning ring 4, one end of the ink guide core 5 passing through the positioning ring 4 and extending into the interior of the conical tip sleeve 2, a pen tip 6 fixedly connected to the bottom of the ink guide core 5, one end of the pen tip 6 passing through the ink outlet 3 and extending to the outside of the conical tip sleeve 2, a sealing groove 7 opened at the inner bottom of the pen barrel 1, a conical bottom sealing ring 8 adapted to the sealing groove 7 fixedly connected to the bottom of the positioning ring 4, a pair of sealing rubber rings 9 fixedly connected inside the sealing groove 7, one end of the conical bottom sealing ring 8 embedded between the two sealing rubber rings 9, a limiting ring plate 15 fixedly connected inside the pen barrel 1, the positioning ring 4 installed between the limiting ring plate 15 and the sealing groove 7, and a locking component installed at one end of the ink guide core 5.
[0034] The locking assembly includes a bottom ring plate 10 fixedly connected to one end of the ink guide core 5. The bottom ring plate 10 is installed below the positioning ring 4. A locking rubber ring 11 is fixedly connected to the top of the bottom ring plate 10. The locking rubber ring 11 is sleeved around the ink guide core 5. A locking inner groove 12 is opened at the bottom of the pen barrel 1. The bottom ring plate 10 and the locking rubber ring 11 are installed inside the locking inner groove 12.
[0035] In use, the ink guide core 5 first guides the ink inside the pen barrel 1 to seep into the pen tip 6, and the pen tip 6 guides the ink for use. The pen tip 6 transmits the resistance generated during use to the ink guide core 5, which in turn causes the ink guide core 5 to drive the positioning ring 4 to contact the limiting ring plate 15. At the same time, the positioning ring 4 drives the conical bottom sealing ring 8 to insert into the sealing groove 7, and the conical bottom sealing ring 8 compresses the sealing rubber ring 9 to deform. The deformation of the sealing rubber ring 9 fills the space between the sealing groove 7 and the conical bottom sealing ring 8, thereby improving the connection and sealing between the pen barrel 1 and the positioning ring 4 and effectively reducing ink leakage.
[0036] Meanwhile, by utilizing the elastic properties of the locking rubber ring 11, the locking rubber ring 11 rebounds and pushes out the bottom support ring plate 10 during use, and pushes the bottom support ring plate 10 to move the positioning ring 4 downward along the length direction of the ink guide core 5. At the same time, the positioning ring 4 pushes the conical bottom sealing ring 8 into the interior of the sealing groove 7 to maintain the tight contact between the conical bottom sealing ring 8 and the sealing rubber ring 9, further improving the connection and sealing between the pen barrel 1 and the positioning ring 4, and reducing ink leakage.
[0037] Reference Figure 1 - Figure 3 The cone tip sleeve 2 is fixedly connected to the support cylinder 13. An ink storage chamber is formed between the cone tip sleeve 2 and the support cylinder 13. A pair of overflow holes 14 communicating with the ink storage chamber are symmetrically opened at one end of the support cylinder 13.
[0038] When in use, if too much ink seeps out from the inside of the ink guide core 5 to one end of the pen tip 6, the ink will flow along the inside of the support cylinder 13, through the overflow hole 14, into the ink storage tank and accumulate. After the ink at one end of the pen tip 6 is used up, the ink accumulated in the ink storage tank will flow back into the inside of the ink guide core 5 through the overflow hole 14 for use. This effectively reduces the situation of ink overflow and improves the practicality of the device.
[0039] Reference Figure 1 - Figure 3 An elastic airbag 16 is fixedly connected inside the pen barrel 1.
[0040] In use, the elastic properties of the elastic airbag 16 are first utilized so that when the external air pressure decreases, the elastic airbag 16 expands and absorbs the excess air pressure inside the pen barrel 1. Then, when the external air pressure increases, the elastic airbag 16 contracts and releases air to balance the air pressure.
[0041] Reference Figure 1 - Figure 3 A negative pressure slider 17 is inserted inside the pen barrel 1. A negative pressure rubber ring 18 is fixedly sleeved around the negative pressure slider 17. The negative pressure rubber ring 18 abuts against the inner wall of the pen barrel 1. A vent hole is opened at the top of the pen barrel 1.
[0042] The negative pressure slider 17 has a weight reduction chamber 19 inside.
[0043] In use, the negative pressure rubber ring 18 is first set to abut against the inner wall of the pen barrel 1, and the negative pressure slider 17 forms a sealed contact with the pen barrel 1 through the negative pressure rubber ring 18. Then, when the ink inside the pen barrel 1 is consumed and the ink level drops, the air pressure inside the pen barrel 1 pushes the negative pressure slider 17 downward along the length of the ink guide core 5, and pushes the ink downward, so that the ink always fills the internal space of the pen barrel 1 below the negative pressure slider 17. This reduces the situation where the ink loses contact with the ink guide core 5 due to changes in the horizontal position of the pen barrel 1, resulting in uneven ink output, thus improving the practicality of the device. At the same time, the weight reduction chamber 19 is set to reduce the weight of the negative pressure slider 17, thereby reducing the negative pressure suction required to push the negative pressure slider 17, and further improving the practicality of the device.
[0044] Reference Figure 1 - Figure 3 A T-shaped rubber plug 20 is inserted inside the vent hole, and multiple fine holes 21 are evenly opened inside the T-shaped rubber plug 20.
[0045] In use, the T-shaped rubber plug 20 is manually pulled into the vent hole, so that the T-shaped rubber plug 20 intercepts and filters the gas passing through the vent hole, allowing air to pass through the fine hole 21 and enter the pen barrel 1. Solid foreign objects are intercepted at the top of the T-shaped rubber plug 20, thereby reducing the impact of foreign objects on the internal sealing of the pen barrel 1 and improving the practicality of the device.
[0046] Reference Figure 1 - Figure 3 One end of the pen barrel 1 is symmetrically fixed with rubber pads 22.
[0047] During use, the rubber pad 22 creates a flexible contact between the pen barrel 1 and the hand, effectively increasing the friction between the pen barrel 1 and the hand and improving the grip stability of the pen barrel 1 surface.
[0048] The implementation principle of this embodiment of an anti-leakage eyeliner is as follows: First, the ink guide core 5 is set to guide the ink inside the pen barrel 1 to penetrate into the pen tip 6. The ink is then guided by the pen tip 6 for use. The pen tip 6 transmits the resistance generated during use to the ink guide core 5, which in turn causes the ink guide core 5 to drive the positioning ring 4 to form contact with the limiting ring plate 15. At the same time, the positioning ring 4 drives the conical bottom sealing ring 8 to insert into the sealing groove 7, and the conical bottom sealing ring 8 compresses the sealing rubber ring 9 to deform. The deformation of the sealing rubber ring 9 fills the space between the sealing groove 7 and the conical bottom sealing ring 8. Meanwhile, the elastic properties of the locking rubber ring 11 are utilized so that during use, the locking rubber ring 11 rebounds and pushes out the bottom support ring plate 10, which in turn pushes the bottom support ring plate 10 to drive the positioning ring 4 to move downward along the length of the ink guide core 5. At the same time, the positioning ring 4 pushes the conical bottom sealing ring 8 into the sealing groove 7.
[0049] At the same time, when the ink inside the pen barrel 1 is consumed and the ink level drops, the air pressure inside the pen barrel 1 pushes the negative pressure slider 17 to move downward along the length of the ink guide core 5, and pushes the ink downward, so that the ink always fills the internal space of the pen barrel 1 below the negative pressure slider 17, thereby reducing the situation where the ink loses contact with the ink guide core 5 due to the change of the horizontal position of the pen barrel 1, resulting in uneven ink output.
[0050] Then, when too much ink seeps out from the inside of the ink guide core 5 to one end of the pen tip 6, the ink flows along the inside of the support cylinder 13, through the overflow hole 14, into the ink storage tank and accumulates. After the ink at one end of the pen tip 6 is used up, the ink accumulated in the ink storage tank flows back into the inside of the ink guide core 5 through the overflow hole 14 for use.
Claims
1. A leak-proof eyeliner pen, comprising a pen barrel (1), characterized in that: The bottom of the pen barrel (1) is threaded with a conical tip sleeve (2). An ink outlet (3) is provided at the bottom of the conical tip sleeve (2). A positioning ring (4) is inserted inside the pen barrel (1). One end of the positioning ring (4) is fixedly connected to an ink guide core (5). One end of the ink guide core (5) passes through the positioning ring (4) and extends into the conical tip sleeve (2). A pen tip (6) is fixedly connected to the bottom of the ink guide core (5). One end of the pen tip (6) passes through the ink outlet (3) and extends into the outside of the conical tip sleeve (2). A sealing groove (7) is provided at the bottom of the rod (1). A conical bottom sealing ring (8) adapted to the sealing groove (7) is fixedly connected to the bottom of the positioning ring (4). A pair of sealing rubber rings (9) are fixedly connected inside the sealing groove (7). One end of the conical bottom sealing ring (8) is embedded between the two sealing rubber rings (9). A limiting ring plate (15) is fixedly connected inside the pen barrel (1). The positioning ring (4) is installed between the limiting ring plate (15) and the sealing groove (7). A locking component is installed at one end of the ink guide core (5).
2. The leak-proof eyeliner according to claim 1, characterized in that: The locking assembly includes a bottom ring plate (10) fixedly connected to one end of the ink guide core (5). The bottom ring plate (10) is installed below the positioning ring (4). A locking rubber ring (11) is fixedly connected to the top of the bottom ring plate (10). The locking rubber ring (11) is sleeved around the ink guide core (5). A locking inner groove (12) is opened at the bottom of the pen barrel (1). The bottom ring plate (10) and the locking rubber ring (11) are installed inside the locking inner groove (12).
3. The leak-proof eyeliner according to claim 1, characterized in that: The cone tip sleeve (2) is fixedly connected to a support cylinder (13), and an ink storage chamber is formed between the cone tip sleeve (2) and the support cylinder (13). A pair of overflow holes (14) communicating with the ink storage chamber are symmetrically opened at one end of the support cylinder (13).
4. The leak-proof eyeliner according to claim 1, characterized in that: An elastic airbag (16) is fixedly connected inside the pen barrel (1).
5. The leak-proof eyeliner according to claim 1, characterized in that: A negative pressure slider (17) is inserted inside the pen barrel (1), and a negative pressure rubber ring (18) is fixedly sleeved around the negative pressure slider (17). The negative pressure rubber ring (18) abuts against the inner wall of the pen barrel (1), and a vent hole is opened at the top of the pen barrel (1).
6. The leak-proof eyeliner according to claim 5, characterized in that: The negative pressure slider (17) has a weight reduction chamber (19) inside.
7. The leak-proof eyeliner according to claim 5, characterized in that: A T-shaped rubber plug (20) is inserted inside the vent hole, and a plurality of fine holes (21) are evenly opened inside the T-shaped rubber plug (20).
8. The leak-proof eyeliner according to claim 1, characterized in that: One end of the pen barrel (1) is symmetrically fixed with rubber pads (22).