Foldable inner plug and applicator comprising same

Abstract

A foldable inner plug and an applicator comprising same. The inner plug comprises a plug body (10), a folding part (20) and a scraping part (30); a first end of the folding part (20) is fixedly connected to the plug body (10), and a second end of the folding part (20) is fixedly connected to a first end of the scraping part (30); a second end of the scraping part (30) is a free end, and the second end of the scraping part (30) forms a scraping opening (32); when a brush head (41) is pulled out of a bottle body (50) and passes through the scraping part (30), driven by the brush head (41), the scraping part (30) can be folded towards the plug body (10) along the folding part (20). The inner plug is provided with the folding part (20), and the scraping part (30) can be folded towards a bottleneck side along the folding part (20), so that the scraping part (30) is provided with a moderate scraping force, thus achieving good scraping effects without scrapping bristles off the brush head (41).

Description

Foldable inner plug and applicator containing the same Technical Field

[0001] The present application relates to cosmetic packaging technology, and in particular to a foldable inner plug and an applicator comprising the inner plug. Background Art

[0002] Cosmetic bottle plugs are often equipped with a scraper. When the plug is removed from the bottle, the scraper removes any cosmetics adhering to the brush rod, keeping the rod clean. To ensure effective scraping, conventional techniques have employed a method where the inner sidewall of the scraper is tightly fitted to the outer sidewall of the rod. However, this makes it easy for the scraper to remove the bristles from the brush rod head, causing them to fall off and affecting the cosmetic application.

[0003] Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the present application provides a foldable inner plug, which is provided with a bending portion. The scraping portion can be folded along the bending portion toward the bottle mouth, so that the scraping force of the scraping portion is moderate and can achieve a good scraping effect without scraping off the bristles on the brush head.

[0005] The technical solution adopted by this application to solve its technical problems is:

[0006] A foldable inner plug comprises a plug body, a bending portion and a scraping portion, wherein the first end of the bending portion is fixedly connected to the plug body, the second end of the bending portion is fixedly connected to the first end of the scraping portion, the second end of the scraping portion is a free end, and the second end of the scraping portion forms a scraping opening. When the brush head is pulled out of the bottle body and passes through the scraping portion, the scraping portion can be folded along the bending portion toward the plug body under the drive of the brush head.

[0007] Optionally, the thickness of the bending portion is smaller than the thickness of the scraping portion.

[0008] Optionally, the bent portion protrudes radially outward from the first end of the scraping portion.

[0009] Optionally, the hardness of the bending portion is smaller than the hardness of the scraping portion.

[0010] Optionally, the bending portion is provided with N slots arranged at intervals along the circumferential direction, wherein N≥1 and N is an integer.

[0011] Optionally, the scraping portion is in a conical structure, the diameter of the first end of the scraping portion is larger than the diameter of the second end of the scraping portion, and the second end of the scraping portion is provided with a serration structure.

[0012] Optionally, the cross-section of the side wall of the scraping portion along the axial direction is arc-shaped, inclined or wavy.

[0013] Optionally, when the cross-section of the side wall of the scraper portion along the axial direction is wavy, the scraper portion includes 1 to 6 groups of undulations, and the undulations include at least one of a leading peak structure, a trailing peak structure, a symmetrical peak structure, a sawtooth structure, a V-shaped structure and a U-shaped structure.

[0014] Optionally, if any two points are taken on the scraper portion, the thicknesses of the scraper portion at the two points are D1 and D2 respectively, then the difference between D1 and D2 is less than Δ, where Δ is the tolerance; or, if any two points A and B are taken on the scraper portion, the distance between point A and the first end of the scraper portion is less than the distance between point B and the first end of the scraper portion, then the thickness of the scraper portion at point A is greater than the thickness of the scraper portion at point B.

[0015] The present application also provides an applicator, comprising a foldable inner plug, an outer cover, a brush rod and a bottle body, wherein the inner plug is installed at the bottle mouth of the bottle body, the first end of the brush rod is fixedly installed in the outer cover, the second end of the brush rod is fixedly connected to the brush head, and a step is provided between the brush rod and the brush head, and the step can carry the scraping part and fold along the bending part toward the plug body.

[0016] The present application has the following beneficial effects: the inner plug of the present application comprises a plug body, a bent portion, and a scraper portion. The upper end of the bent portion is connected to the plug body, and the lower end of the bent portion is connected to the scraper portion. When the brush head passes through the scraper portion, the brush head carries the scraper portion upward until the scraper portion is completely turned up along the bent portion. The brush head then continues upward and exits the upturned scraper opening. Because the scraper opening of the scraper portion is affixed to the brush shaft, it can scrape off material on the brush shaft and excess material in the brush head. Moreover, when the brush head is removed from the scraper opening, the scraper opening is in an upturned state, reducing the resistance of the scraper opening to the brush head, making it easier to remove the brush head from the scraper opening without scraping off the bristles on the brush head, thereby ensuring the cosmetic effect of the brush head. Therefore, the scraper portion of the inner plug of the present application has a moderate scraping force, which can achieve a good scraping effect while preventing the bristles from being scraped off, thereby extending the service life of the brush head. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic diagram of the structure of the inner plug in a natural state in Example 1 of the present application;

[0018] FIG2 is a second structural diagram of the inner plug in the natural state in Example 1 of the present application;

[0019] FIG3 is a third structural diagram of the inner plug in the natural state in Example 1 of the present application;

[0020] FIG4 is a schematic diagram of the structure of the inner plug in the folded state in Example 1 of the present application;

[0021] FIG5 is a second structural diagram of the inner plug in the folded state in Example 1 of the present application;

[0022] FIG6 is a third structural diagram of the inner plug in the folded state in Example 1 of the present application;

[0023] FIG7 is a schematic diagram of the structure of the inner plug in the natural state in Example 2 of the present application;

[0024] FIG8 is a second structural diagram of the inner plug in the natural state in Example 2 of the present application;

[0025] FIG9 is a third structural diagram of the inner plug in the natural state in Example 2 of the present application;

[0026] FIG10 is a schematic diagram of the structure of the inner plug in the folded state in Example 1 of the present application;

[0027] FIG11 is a second structural diagram of the inner plug in the folded state in Example 2 of the present application;

[0028] FIG12 is a third structural diagram of the inner plug in the folded state in Example 2 of the present application;

[0029] FIG13 is a schematic diagram of the structure of the inner plug in a natural state in Example 3 of the present application;

[0030] FIG14 is a second schematic diagram of the structure of the inner plug in the natural state in Example 3 of the present application;

[0031] FIG15 is a third structural diagram of the inner plug in the natural state in Example 3 of the present application;

[0032] FIG16 is a schematic diagram showing the structure of the inner plug in a folded state in Example 3 of the present application;

[0033] FIG17 is a second structural diagram of the inner plug in the folded state in Example 3 of the present application;

[0034] FIG18 is a third structural diagram of the inner plug in the folded state in Example 3 of the present application;

[0035] FIG19 is a state diagram of the inner plug folding process in Example 3 of the present application;

[0036] FIG20 is a second state diagram of the inner plug folding process in Example 3 of the present application;

[0037] FIG21 is a third state diagram of the inner plug folding process in Example 3 of the present application;

[0038] FIG22 is a fourth state diagram of the inner plug folding process in Example 3 of the present application;

[0039] FIG23 is a fifth state diagram of the inner plug folding process in Example 3 of the present application;

[0040] FIG24 is a sixth state diagram of the inner plug folding process in Example 3 of the present application;

[0041] FIG25 is a seventh state diagram of the inner plug folding process in Example 3 of the present application;

[0042] FIG26 is an eighth state diagram of the inner plug folding process in Example 3 of the present application;

[0043] FIG27 is a ninth state diagram of the inner plug folding process in Example 3 of the present application;

[0044] FIG28 is a tenth state diagram of the inner plug folding process in Example 3 of the present application;

[0045] In the figure: 10-plug body, 11-convex edge, 12-hook, 20-bending part, 30-scraping part, 31-serrated structure, 32-scraping mouth, 40-brush rod, 41-brush head, 42-step, 50-bottle body, 51-bottle mouth. DETAILED DESCRIPTION

[0046] The following will be combined with the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described in this application are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the following drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the objects used in this way can be interchanged where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] Example 1: As shown in Figures 1-6, a foldable inner plug includes a plug body 10, a bending portion 20 and a scraper portion 30. The first end of the bending portion 20 is fixedly connected to the plug body 10, and the second end of the bending portion 20 is fixedly connected to the first end of the scraper portion 30. The second end of the scraper portion 30 is a free end, and the second end of the scraper portion 30 forms a scraping port 32. When the brush head 41 is pulled out of the bottle body 50 and passes through the scraper portion 30, the scraper portion 30 can be folded along the bending portion 20 toward the plug body 10 under the drive of the brush head 41, that is, the scraper portion 30 is folded upward to the state shown in Figure 5. The inner plug disclosed in the present application is made of an elastic material. Optionally, the inner plug is made of NBR, i.e., nitrile rubber. As shown in FIG19 , the inner plug is installed at the bottle mouth 51 of the bottle body 50. The bottle body 50 can store cosmetics, makeup, or skin care products, such as mascara, liquid lipstick, lip gloss, nail polish, eye shadow, etc. The user dips the brush head 41 of the brush rod 40 into the cosmetic material in the cosmetic container to apply makeup. Before the brush rod 40 and the brush head 41 are separated from the cosmetic container, the excess material must be scraped off through the scraping opening 32. As shown in FIG1 , the inner plug comprises, from top to bottom, a plug body 10, a bend 20, and a scraping portion 30. As shown in FIG19-28 , when the brush head 41 passes through the scraping portion 30, the brush head moves upward with the scraping portion 30 until the scraping portion 30 is completely turned up along the bend 20. The brush head then continues to move upward and is separated from the turned-up scraping opening 32. Since the scraping port 32 of the scraping portion 30 is attached to the brush rod 40, the scraping port can scrape off the material on the brush rod and the excess material in the brush head. Moreover, when the brush head is separated from the scraping port, the scraping port is in an upward state, so the resistance of the scraping port to the brush head is reduced, making it easy to pull the brush head out of the scraping port without scraping off the bristles on the brush head, thereby ensuring the makeup effect of the brush head.

[0050] In a first possible embodiment, the thickness of the bending portion 20 is smaller than the thickness of the scraping portion 30, that is, the bending portion 20 and the scraping portion 30 are made of the same material, but the thickness of the bending portion 20 is smaller than the thickness of the scraping portion 30, so that the strength of the bending portion is smaller than the strength of the scraping portion. When the scraping portion moves upward with the brush head, it is easy to bend at the bending portion 20, which facilitates the smooth flipping up of the scraping portion 30.

[0051] 1-3 , the bent portion 20 protrudes radially outward from the first end of the scraper portion 30. Protruding the bent portion from the scraper portion reduces the strength of the connection between the bent portion and the scraper portion, making it easier for the scraper portion to turn up along the bent portion.

[0052] In a second possible embodiment, the hardness of the bent portion 20 is less than that of the scraper portion 30, that is, the material of the bent portion is harder than that of the scraper portion. This also achieves the effect of smooth upward flipping of the scraper portion 30. The inner plug can be a one-piece molded part, for example, by injection molding, injection molding, or thermoforming, with the bent portion 20 and the scraper portion 30 made of two different materials, with the hardness of the bent portion being less than that of the scraper portion. Alternatively, the scraper portion and the bent portion can be made of the same material but different hardness, thereby achieving the goal of having the hardness of the bent portion 20 be less than that of the scraper portion 30. In this embodiment, the thickness of the bent portion 20 can be the same as or less than that of the scraper portion 30.

[0053] In a third possible embodiment, the bent portion 20 is provided with N slots spaced apart along the circumference, where N ≥ 1 and is an integer. That is, one, two, or more slots may be provided along the circumference of the bent portion. This structural design can also reduce the strength of the bent portion 20.

[0054] Optionally, the sum of the perimeters of all the slots is 0.15 to 0.4 times the entire perimeter of the bending portion. In this way, both the strength requirement of the bending portion and the requirement for the scraping portion to turn upward can be met.

[0055] As shown in Figures 1-6, the inner plug has a hollow cylindrical structure. The upper end of the plug body 10 extends radially outward to form a rim 11, and the outer peripheral surface of the lower end of the plug body 10 extends radially outward to form a circle of barbs 12. During assembly, the rim 11 of the plug body 10 presses against the bottle mouth 51 of the bottle body 50, facilitating the sealing of the entire container. The provision of the barbs 12 facilitates a tight fit between the plug body and the container. In one possible embodiment, at any two points on the scraper portion 30, the thickness of the scraper portion 30 at the two points is D1 and D2, respectively. The difference between D1 and D2 is less than Δ, where Δ is a tolerance. The specific value of Δ is determined based on the actual conditions such as the size, material, precision requirements, and application scenario of the inner plug. Optionally, Δ is 0.1% to 5% of the average thickness of the scraper portion 30, which facilitates product molding. In another possible embodiment, if any two points A and B are selected on the scraper portion 30, and the distance between point A and the first end of the scraper portion 30 is shorter than the distance between point B and the first end of the scraper portion 30, then the thickness of the scraper portion 30 at point A is greater than the thickness of the scraper portion 30 at point B. That is, the first end of the scraper portion 30 is thickest, and the second end is thinnest. In this way, when scraping, the scraping opening 32 of the scraper portion 30 is first turned upward, which in turn drives the entire scraper portion to gradually turn upward, making it easier for the brush head to detach from the scraping opening 32.

[0056] Optionally, the scraper portion 30 has a conical structure. This conical structure means that the cross-sectional area of ​​the first end of the scraper portion 30 is larger than the cross-sectional area of ​​the second end. If the cross-section of the scraper portion 30 is circular, the diameter of the first end of the scraper portion 30 is larger than the diameter of the second end of the scraper portion 30, and the second end of the scraper portion 30 is provided with a serration structure 31. This means that the serration structure 31 on the scraper opening 32 improves the scraping effect.

[0057] The cross section of the side wall of the scraper portion 30 along the axial direction is arc-shaped, inclined or wavy. In embodiment 1: as shown in Figures 1-6, the side wall of the scraper portion 30 is arc-shaped, that is, the scraper portion 30 is a bowl-shaped structure as a whole.

[0058] Example 2: As shown in Figures 7-12, the difference between this example and Example 1 is that the side wall of the scraping part 30 is an inclined surface, that is, the scraping part as a whole is a frustum structure.

[0059] Example 3: As shown in Figures 13-18, this example differs from Example 1 in that the sidewalls of the scraper portion 30 have a wavy structure, and the scraper portion 30 as a whole resembles a bellows structure. Of course, the scraper portion 30 can also have a hemispherical, ellipsoidal, or other irregular shapes. When the axial cross-section of the sidewalls of the scraper portion 30 is wavy, the scraper portion 30 includes one to six groups of undulations, each of which can include a single protrusion, a protrusion and a depression, or a single depression. That is, the surface of the scraper portion 30 has several protrusions, several depressions, or several pairs of protrusions and depressions. The undulations can be distributed regularly or irregularly. The shape and amplitude of the undulations can also vary. Optionally, the undulations can include at least one of a leading peak structure, a trailing peak structure, a symmetrical peak structure, a sawtooth structure, a V-shaped structure, and a U-shaped structure. In other words, all undulations can adopt any one of the above structures, or a combination of two or more of the above structures.

[0060] As shown in FIG19 , an applicator includes an inner plug, an outer cover, a brush rod 40, and a bottle body 50. The inner plug is mounted in the bottle mouth 51 of the bottle body 50. The first end of the brush rod 40 is fixedly mounted in the outer cover, and the second end of the brush rod 40 is fixedly connected to the brush head 41. A step 42 is provided between the brush rod 40 and the brush head 41. The step 42 can be used to tilt the scraper portion 30 along the bend 20 toward the plug body 10. The outer cover is not shown in the figure. The step 42 is designed at the connection between the brush rod 40 and the brush head 41. FIG19-28 illustrate ten state diagrams of the inner plug of Example 3 during the upward tilting process driven by the brush head. In the figures, the inner plug is mounted in the bottle mouth 51 of the bottle body 50, and the brush rod 40 is pulled out of the bottle body 50. When the step 42 reaches the scraper portion 30, it drives the scraper portion 30 upward and gradually tilts upward. FIG19-28 illustrate the changes in the scraper portion 30 during the upward tilting process.

[0061] It should be noted that those skilled in the art may make a number of modifications and improvements without departing from the concept of this application, and these modifications and improvements are all within the scope of protection of this application. Therefore, the scope of protection of this patent application shall be based on the appended claims.

Claims

1. A foldable inner plug, characterized in that: The invention comprises a plug body (10), a bending portion (20) and a scraping portion (30); the first end of the bending portion (20) is fixedly connected to the plug body (10); the second end of the bending portion (20) is fixedly connected to the first end of the scraping portion (30); the second end of the scraping portion (30) is a free end, and the second end of the scraping portion (30) forms a scraping opening (32); when a brush head (41) is pulled out of a bottle body (50) and passes through the scraping portion (30), the scraping portion (30) can be folded along the bending portion (20) towards the plug body (10) under the drive of the brush head (41).

2. The foldable inner plug according to claim 1, characterized in that: The thickness of the bending portion (20) is smaller than the thickness of the scraping portion (30).

3. The foldable inner plug according to claim 2, characterized in that: The bent portion (20) protrudes radially outward from a first end of the scraping portion (30).

4. The foldable inner plug according to claim 1, characterized in that: The hardness of the bending portion (20) is smaller than the hardness of the scraping portion (30).

5. The foldable inner plug according to claim 1, characterized in that: The bending portion (20) is provided with N slots arranged at intervals along the circumferential direction, wherein N≥1, and N is an integer.

6. The foldable inner plug according to claim 1, characterized in that: The scraper portion (30) is in a cone structure, the diameter of the first end of the scraper portion (30) is larger than the diameter of the second end of the scraper portion (30), and the second end of the scraper portion (30) is provided with a sawtooth structure (31).

7. The foldable inner plug according to claim 6, characterized in that: The cross section of the side wall of the scraper portion (30) along the axial direction is arc-shaped, inclined or wavy.

8. The foldable inner plug according to claim 7, characterized in that: When the cross-section of the side wall of the scraper portion (30) along the axial direction is wavy, the scraper portion (30) includes 1 to 6 groups of undulations, and the undulations include at least one of a leading peak structure, a trailing peak structure, a symmetrical peak structure, a sawtooth structure, a V-shaped structure, and a U-shaped structure.

9. The foldable inner plug according to claim 1, characterized in that: Take any two points on the scraper portion (30), the thicknesses of the scraper portion (30) at the two points are D1 and D2 respectively, and the difference between D1 and D2 is less than Δ, where Δ is the tolerance; or take any two points A and B on the scraper portion (30), the distance between point A and the first end of the scraper portion (30) is less than the distance between point B and the first end of the scraper portion (30), and the thickness of the scraper portion (30) at point A is greater than the thickness of the scraper portion (30) at point B.

10. An applicator, characterized in that: It comprises a foldable inner plug, an outer cover, a brush rod (40) and a bottle body (50) as described in any one of claims 1 to 9, wherein the inner plug is installed at the bottle mouth (51) of the bottle body (50), the first end of the brush rod (40) is fixedly installed in the outer cover, the second end of the brush rod (40) is fixedly connected to the brush head (41), and a step (42) is provided between the brush rod (40) and the brush head (41), and the step (42) can be folded along the bending portion (20) toward the plug body (10) with the scraping portion (30).

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