Inner plug and cosmetic container comprising same

Abstract

The inner plug is installed at a bottle opening of a bottle body, the inner plug comprises a plug body, a scraping lip is arranged on the inner side wall of the plug body, a groove is formed in the outer side wall of the plug body, an exhaust channel is formed in the groove bottom of the groove, and the scraping lip and the exhaust channel are communicated with each other. The opening area of the exhaust channel is located at the groove bottom of the groove, the exhaust channel is communicated with the inner side space of the scraping lip and the outer side space of the scraping lip through the groove, and the inner side space of the scraping lip refers to the inner space of the bottle body which takes the scraping lip as a boundary and is far away from the bottle opening. And the outer side space of the scraping lip is a space in the bottle body which takes the scraping lip as a boundary and is close to the bottle opening. According to the cosmetic bottle, the exhaust channel is formed in the inner plug, and air in the inner side space of the scraping lip is exhausted in time through the exhaust channel, so that cosmetic materials in the bottle body are prevented from splashing out due to sudden change of air pressure, and the conditions of pollution and material waste are avoided.

Description

Technical Field

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

[0002] At present, in cosmetic containers, an inner plug is usually provided at the mouth of the container. When the applicator is pulled out of the container, the inner plug scrapes the applicator to prevent the applicator from being overloaded with material. The inner plug is usually tightly matched with the applicator to achieve a good scraping effect, and the inner plug is usually sealed with the mouth of the container to prevent the liquid in the container from leaking from the mouth of the container. However, due to the good sealing performance of the inner plug, when the applicator is inserted into the container and then taken out, the cosmetic material in the container is easily splashed out due to the sudden change in air pressure, causing pollution and waste of materials. Summary of the invention

[0003] In order to overcome the above-mentioned defects, the present application provides an inner plug, which is provided with an exhaust channel, and the air in the bottle body is discharged in time by the exhaust channel, thereby avoiding the cosmetic materials in the bottle body from splashing out due to sudden changes in air pressure, causing pollution and material waste.

[0004] The technical solution adopted by this application to solve its technical problems is:

[0005] A kind of inner plug is installed at the bottle mouth of a bottle body, the inner plug comprises a plug body, the inner wall of the plug body is provided with a scraper lip, the outer wall of the plug body is provided with a groove, the bottom of the groove is provided with an exhaust channel, the opening area of ​​the exhaust channel is located at the bottom of the groove, the exhaust channel is connected to the inner space of the scraper lip and the outer space of the scraper lip through the groove, the inner space of the scraper lip refers to the space in the bottle body with the scraper lip as the dividing line and away from the bottle mouth, and the outer space of the scraper lip refers to the space in the bottle body with the scraper lip as the dividing line and close to the bottle mouth.

[0006] Optionally, the exhaust passage is a one-way valve, and the flow direction of the exhaust passage is from the inner space of the scraper lip to the outer space of the scraper lip.

[0007] Optionally, the exhaust passage comprises a cutout, and a shape of the cutout comprises at least one of a straight line shape, a curved line shape and a spiral shape.

[0008] Optionally, the exhaust passage includes a through hole, and the shape of the through hole includes at least one of a strip hole, a circular hole and a polygonal hole.

[0009] Optionally, the shape of the groove includes at least one of a bar shape, an arc shape and a spiral shape.

[0010] Optionally, the first end of the groove is located between the first end and the second end of the plug body, and after assembly, the second end of the groove is located in the inner space of the scraper lip, and the exhaust channel is located above the scraper lip.

[0011] Optionally, the scraper lip is arranged on the inner side wall between the first end and the second end of the plug body, and the scraper lip is close to the second end of the plug body.

[0012] Optionally, the scraper lip extends radially inward along the inner side wall of the plug body, the first end of the scraper lip is fixedly connected to the inner side wall of the plug body, the second end of the scraper lip is a free end, and the second end of the scraper lip is used for scraping.

[0013] Optionally, the scraper lip is funnel-shaped, the first end of the scraper lip is located above the second end of the scraper lip, and the second end of the scraper lip is gathered to form a scraper hole.

[0014] Optionally, two points are randomly selected on the scraper lip, and the thicknesses of the scraper lip 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.

[0015] Optionally, taking any two points A and B on the scraper lip, if the distance between point A and the second end of the scraper lip is smaller than the distance between point B and the second end of the scraper lip, the thickness of the scraper lip at point A is smaller than the thickness of the scraper lip at point B.

[0016] Optionally, the hardness of the plug body is greater than the hardness of the scraper lip, and the plug body and the scraper lip are an integrally formed injection molded part.

[0017] Optionally, the outer wall of the plug body is provided with N fins, the distance between two adjacent fins is equal, the groove is provided on the plug body between two adjacent fins, the groove is arranged along the axial direction of the plug body, and the groove extends to the second end of the plug body, wherein N≥2, and N is an integer.

[0018] The present application also provides a cosmetic container, comprising the inner plug, the outer cover, the brush rod and the 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 the outer cover is detachably mounted on the bottle mouth of the bottle body.

[0019] Optionally, the first end of the plug body extends radially outward to form a circle of convex edge, the outer wall of the plug body is provided with convex ribs and fins, the inner wall of the bottle mouth is provided with a groove matching the convex ribs, the convex edge is fitted to the bottle mouth of the bottle body, and the fins are fitted to the shoulder of the bottle body.

[0020] The beneficial effect of the present application is as follows: a groove is provided on the outer wall of the inner plug in the present application, and an exhaust channel is provided at the bottom of the groove, and the exhaust channel is connected to the inner space of the scraper lip and the outer space of the scraper lip. Therefore, when the brush rod breaks through the scraper lip and enters the inner space of the scraper lip, the air in the inner space of the scraper lip can be discharged from the exhaust channel in time, avoiding the increase of air pressure in the inner space of the scraper lip due to the entry of the brush rod and the brush head, and then avoiding the phenomenon that the cosmetic material is splashed due to the sudden change of air pressure in the inner space of the scraper lip when the brush head is separated from the scraper lip. Therefore, the present inner plug has good safety performance and high cleanliness when in use, and will not cause waste of cosmetic materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the structural schematic diagrams of the inner plug in this application;

[0022] Figure 2 This is the second structural diagram of the inner plug in this application;

[0023] Figure 3 This is the third structural diagram of the inner plug in this application;

[0024] Figure 4 This is the fourth structural diagram of the inner plug in this application;

[0025] Figure 5 for Figure 4 Sectional view along AA;

[0026] Figure 6 for Figure 4 Cross-sectional view along the middle line BB;

[0027] Figure 7 for Figure 4 Cross-sectional view at the middle edge CC;

[0028] Figure 8 This is a schematic diagram of the structure of the cosmetic container in this application;

[0029] Fig. 9 for Figure 8 The enlarged view of point D in the middle;

[0030] Fig.10 An exploded view of the cosmetic container in this application;

[0031] In the figure: 10-plug body, 11-groove, 12-exhaust channel, 13-fin, 14-convex edge, 15-convex rib, 20-scraper lip, 30-outer cover, 31-internal thread, 40-brush rod, 41-brush head, 50-bottle body, 51-bottle mouth, 52-slot, 53-external thread, 61-inner space, 62-outer space. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the embodiments described in the present application are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present 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 present 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 of their variations 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 that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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.

[0035] Example: Figure 1-10 As shown, an inner plug is installed at the bottle mouth 51 of the bottle body 50, and the inner plug includes a plug body 10. A scraper lip 20 is provided on the inner wall of the plug body 10, and a groove 11 is provided on the outer wall of the plug body 10. An exhaust channel 12 is provided at the bottom of the groove 11, and the opening area of ​​the exhaust channel 12 is located at the bottom of the groove 11, that is, a part of the bottom of the groove 11 is opened as the exhaust channel, thereby ensuring that the strength of the inner plug meets the use requirements and reducing the possibility of material leakage.

[0036] The exhaust channel 12 is connected to the inner space 61 of the scraper lip 20 and the outer space 62 of the scraper lip 20 through the groove 11. The inner space 61 of the scraper lip 20 refers to the space inside the bottle body 50 with the scraper lip 20 as the dividing line and away from the bottle mouth 51, and the outer space 62 of the scraper lip 20 refers to the space inside the bottle body 50 with the scraper lip 20 as the dividing line and close to the bottle mouth 51.

[0037] The inner plug disclosed in the present application is made of elastic material. Optionally, the inner plug is made of nitrile rubber NBR. Optionally, the plug body 10 is a tubular structure with openings at both ends. Optionally, the plug body 10 is a cylindrical structure with openings at both ends.

[0038] like Figure 8-10 As shown, the inner plug is installed at the bottle mouth 51 of the bottle body 50, and the outer wall of the plug body 10, except for the area at the groove, is fitted to the inner wall of the bottle mouth 51. There is a gap between the groove 11 and the bottle mouth 51 for gas to pass through. The bottle body 50 can store cosmetics, makeup or care products, such as mascara, liquid lipstick, lip gloss, nail polish, eye shadow, etc. The user uses the brush head 41 of the brush rod 40 to dip the cosmetic materials in the bottle body 50 to apply makeup. Before the brush rod 40 and the brush head 41 are separated from the cosmetic container, the excess material needs to be scraped off by the scraper lip 20.

[0039] The exhaust passage 12 is connected to the inner space 61 of the scraper lip 20 and the outer space 62 of the scraper lip 20 through the groove 11. Fig. 9 As shown in the figure, the inner space 61 of the scraper lip 20 refers to the space inside the bottle body 50 with the scraper lip 20 as the dividing line and away from the bottle mouth 51, and the outer space 62 of the scraper lip 20 refers to the space inside the bottle body 50 with the scraper lip 20 as the dividing line and close to the bottle mouth 51. During use, when the brush rod 40 is inserted into the bottle, the brush rod 40 and the inner plug divide the bottle body 50 into the inner space 61 of the scraper lip 20 and the outer space 62 of the scraper lip 20, as shown in the figure. Figure 8 As shown, the space below the scraper lip 20 is the inner space 61 of the scraper lip 20 , and the space above the scraper lip 20 is the outer space 62 of the scraper lip 20 . The groove 11 and the exhaust channel 12 on the plug body 10 connect the inner space 61 and the outer space 62 .

[0040] Due to the existence of the exhaust channel 12 on the plug body 10 in the present application, the inner space 61 of the scraper lip and the outer space 62 of the scraper lip are always in a connected state. Therefore, when the brush rod 40 breaks through the scraper lip 20 and enters the inner space 61 of the scraper lip, the air in the inner space 61 of the scraper lip can be discharged from the exhaust channel 12 in time, avoiding the increase of air pressure in the inner space 61 of the scraper lip due to the entry of the brush rod and the brush head, thereby avoiding the splashing of cosmetic materials due to the sudden change of air pressure in the inner space 61 of the scraper lip at the moment when the brush head is separated from the scraper lip.

[0041] During use of the present application, when the brush rod 40 breaks through the scraper lip 20 and enters the inner space 61 of the scraper lip, the air in the inner space 61 of the scraper lip flows into the groove 11 and is discharged to the outer space 62 of the scraper lip through the exhaust channel 12 in the groove 11, thereby maintaining the pressure balance between the inner space 61 and the outer space 62 of the scraper lip.

[0042] In the present application, a groove 11 is provided on the outer wall of the plug body 10, and the groove 11 is a blind groove, and an exhaust channel 12 is provided at the bottom of the groove 11, so that the air in the inner space 61 of the scraper lip can first flow into the position of the exhaust channel 12 through the groove 11, and then flow into the outer space 62 of the scraper lip through the exhaust channel 12, thereby reducing the opening area of ​​the exhaust channel 12 as much as possible, reducing the risk of material leakage, and at the same time, the scraper lip is arranged on the inner wall of the plug body, so that the exhaust function of the plug body can be achieved under the premise of ensuring a good scraping effect of the plug body. If the groove is directly opened as a through groove, and the scraper lip is arranged at the end of the plug body, the through groove area is large, which increases the risk of material flowing out through the through groove, and the strength of the plug body will be greatly reduced, thereby affecting the scraping effect of the brush lip.

[0043] In a possible implementation, the exhaust channel 12 is a one-way valve, and the flow direction of the exhaust channel 12 is from the inner space 61 of the scraper lip 20 to the outer space 62 of the scraper lip 20. The exhaust channel 12 is set as a one-way valve, and the gas in the outer space 62 of the scraper lip 20 cannot flow into the inner space 61 of the scraper lip through the exhaust channel 12, so that the inner plug can still have the sealing effect of the traditional inner plug while having the exhaust function.

[0044] Optionally, the exhaust passage 12 includes a cutout, and the shape of the cutout is not limited. Optionally, the shape of the cutout includes at least one of a straight line, a curve, and a spiral. The cutout can be a straight line, a curve, a spiral line, or a letter, a figure, etc. composed of multiple line segments. For example, the cutout can be V-shaped, Z-shaped, U-shaped, etc. Optionally, the cutout includes a straight line structure arranged along the axial direction of the plug body 10. The cutout is to directly cut a gap in the bottom of the groove 11, similar to the cutout structure on the nipple. When the brush rod 40 breaks through the scraper lip 20 and enters the inner space 61 of the scraper lip, the pressure of the inner space 61 of the scraper lip increases and the cutout is opened, and the air is discharged through the cutout. When the pressure difference between the inner and outer spaces of the scraper lip disappears, the cutout is closed, so the material in the bottle cannot flow out through the exhaust passage 12.

[0045] In another possible implementation, the exhaust passage 12 includes a through hole, and the shape of the through hole includes at least one of a strip hole, a circular hole, and a polygonal hole. The area of ​​the through hole can be determined according to actual conditions. In order to reduce the risk of leakage, the area of ​​the through hole is as small as possible while satisfying the ventilation function. Figure 3The exhaust channel 12 shown in the figure is a long strip hole, and of course the exhaust channel 12 can also be a circular hole, a polygonal hole or other irregular holes. Optionally, the exhaust channel 12 includes a long strip hole arranged along the axial direction of the plug body 10.

[0046] The shape of the groove 11 is not limited. Optionally, the shape of the groove 11 includes at least one of a bar shape, an arc shape, and a spiral shape. Figure 1 The groove 11 shown in the figure is in the shape of a strip, and the groove 11 can also be set in an arc shape, or the groove 11 is arranged along the circumferential direction of the plug body 10 to form a spiral shape. The function of the groove 11 is to guide the gas in the inner space 61 of the scraper lip into the area near the outer space 62 of the scraper lip, and the gas then flows out to the outside of the plug body through the exhaust channel 12 on the groove 11.

[0047] The first end of the groove 11 is located between the first end and the second end of the plug body 10. After assembly, the second end of the groove 11 is located in the inner space 61 of the scraper lip 20. The exhaust channel 12 is located above the scraper lip 20, and the scraper lip 20 is located on the inner wall of the plug body 10. Therefore, the opening of the exhaust channel 12 will not affect the scraping effect of the scraper lip 20. Figure 1 , Figure 5 and Figure 8 As shown, after assembly, the plug body 10 is installed at the bottle mouth of the bottle body 50, the upper part of the plug body 10 fits against the inner wall of the bottle mouth 51 of the bottle body 50, and the lower part of the plug body 10 is located in the bottle body below the shoulder. The second end of the plug body 10 is located in the inner space 61 of the scraper lip, and the second end of the groove 12 also extends to the inner space 61 of the scraper lip, that is, the second end of the groove 11 is connected to the inner space 61 of the scraper lip, so that the air in the inner space 61 of the scraper lip can flow along the groove 11 to the exhaust channel 12 and be discharged through the exhaust channel 12, thereby keeping the pressure of the inner space 61 and the outer space 62 of the scraper lip equal.

[0048] like Figure 2 , Figure 5-7 As shown, the scraper lip 20 is disposed on the inner side wall between the first end and the second end of the plug body 10, and the scraper lip 20 is close to the second end of the plug body 10. Figure 5 As shown, the first end of the plug body 10 is the upper end and the second end is the lower end, the scraper lip 20 is located on the inner wall of the plug body 10, and the distance between the scraper lip 20 and the first end of the plug body 10 is greater than the distance between the scraper lip 20 and the second end of the plug body 10. Therefore, the groove 11 and the exhaust channel 12 opened on the plug body 10 will not affect the scraping effect of the scraping lip.

[0049] The scraper lip 20 extends radially inward along the inner side wall of the plug body 10. The first end of the scraper lip 20 is fixedly connected to the inner side wall of the plug body 10. The second end of the scraper lip 20 is a free end, and the second end of the scraper lip 20 is used for scraping. The first end and the second end of the scraper lip 20 can be located in the same radial direction of the plug body 10, such as Figure 3 and Figure 4 As shown, the scraper lip 20 is arranged perpendicular to the plug body 10 .

[0050] Optionally, the scraper lip 20 can also be arranged obliquely with the plug body 10, and the scraper lip 20 is funnel-shaped, with the first end of the scraper lip 20 located above the second end of the scraper lip 20, and the second end of the scraper lip 20 is gathered to form a scraper hole. The scraper lip 20 is arranged obliquely toward the bottom of the plug body 10, and the scraper hole is used for scraping when the brush rod and the brush head pass through.

[0051] In a possible implementation, two points are randomly selected on the scraper lip 20, and the thickness of the scraper lip 20 at the two points is D1 and D2 respectively, then the difference between D1 and D2 is less than Δ, where Δ is the tolerance. The specific data of Δ is determined according to the actual conditions such as the size, material, precision requirements and application scenarios of the inner plug. Optionally, Δ is 0.1% to 5% of the average thickness of the scraper lip 20, which facilitates the molding of the product.

[0052] In another possible implementation, if any two points A and B are selected on the scraper lip 20, and the distance between point A and the second end of the scraper lip 20 is smaller than the distance between point B and the second end of the scraper lip 20, the thickness of the scraper lip 20 at point A is smaller than the thickness of the scraper lip 20 at point B. That is, the first end of the scraper lip 20 has the largest thickness and the second end has the thinnest thickness, which can improve the scraping effect of the scraper lip.

[0053] Optionally, the hardness of the plug body 10 is greater than that of the scraper lip 20, and the plug body 10 and the scraper lip 20 are an integrally formed injection molded part. That is, the plug body 10 and the scraper lip 20 are made of two different materials, and the hardness of the plug body 10 material is greater than the hardness of the scraper lip 20 material; or the plug body 10 and the scraper lip 20 are made of the same material but with different hardness. Optionally, the thickness of the scraper lip 20 is less than that of the plug body 10, and the scraper lip 20 is in the form of a thin sheet.

[0054] like Figure 1-7 As shown, the outer wall of the plug body 10 is provided with N fins 13, the distance between two adjacent fins 13 is equal, and a groove 11 is provided on the plug body 10 between two adjacent fins 13. The groove 11 is arranged along the axial direction of the plug body 10, and the groove 11 extends to the second end of the plug body 10, wherein N≥2, and N is an integer. Figure 4Four fins 13 are shown, and a groove 11 is provided between two adjacent fins 13. The groove 11 extends downward along the axial direction of the plug body, and the second end of the groove directly extends to the second end of the plug body 10, that is, the first end of the groove 11 is a closed end, and the second end of the groove 11 is an open section, which is convenient for guiding the gas in the inner space 61 of the scraper lip to the outer space 62.

[0055] like Figure 8-10 As shown, a cosmetic container includes an inner plug, an outer cover 30, a brush rod 40 and a bottle body 50. 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 30, and the second end of the brush rod 40 is fixedly connected to the brush head 41. The outer cover 30 is detachably mounted on the bottle mouth 51 of the bottle body 50. The outer cover 30 and the bottle mouth 51 are detachably connected together by screw connection, clamping connection, interference fit, etc. Optionally, as Fig.10 As shown, an internal thread 31 is provided on the inner wall of the outer cover 30 , and an external thread 53 matching the internal thread 31 is provided on the outer wall of the bottle mouth 51 . The outer cover 30 and the bottle mouth 51 are screwed and fixed via the internal thread 31 and the external thread 53 .

[0056] like Figure 1 and Figure 3 As shown, the first end of the plug body 10 extends radially outward to form a convex edge 14, and the outer side wall of the plug body 10 is provided with a convex rib 15 and a fin 13, as shown in FIG. Fig. 9 As shown, the inner wall of the bottle mouth 51 is provided with a slot 52 matched with the rib 15, the convex edge 14 is fitted to the bottle mouth 51 of the bottle body 50, and the fin 13 is fitted to the shoulder of the bottle body 50. The fin 13 is located close to the second end of the plug body 10, and the number of the fin 13 is an even number. Optionally, the number of the fin 13 is 2, 4, 6 or 8. Fig. 9 As shown, the upper surface of the fin 13 fits with the shoulder of the bottle body 50, and the lower surface of the convex edge 14 on the plug body 10 fits with the bottle mouth 51 of the bottle body, that is, the plug body 10 is positioned by the fin 13 and the convex edge 14 to prevent the inner plug from being taken out when the brush rod 40 is pulled out of the bottle body. The convex rib 15 on the plug body 10 cooperates with the card slot 52 on the bottle body 50. The convex rib 15 can be a bulging block on the plug body, or a whole circle of convex rings formed along the circumference of the inner plug. The convex ring can be one circle, two circles or more circles. The cooperation between the convex rib 15 and the card slot 52 can further improve the bonding strength between the inner plug and the bottle body, and can also play a role in positioning the inner plug when assembling the inner plug. Optionally, the groove 11 is located below the convex rib 15.

[0057] It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these modifications and improvements are all within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the attached claims.

Claims

1. An inner plug, mounted on a bottle mouth (51) of a bottle body (50), characterized in that: The inner plug comprises a plug body (10), a scraper lip (20) is provided on the inner side wall of the plug body (10), a groove (11) is provided on the outer side wall of the plug body (10), an exhaust channel (12) is provided at the bottom of the groove (11), an opening area of ​​the exhaust channel (12) is located at the bottom of the groove (11), and the exhaust channel (12) is connected to the inner side space (61) of the scraper lip (20) and the outer side space (62) of the scraper lip (20) through the groove (11), the inner side space (61) of the scraper lip (20) refers to the inner side space of the bottle body (50) with the scraper lip (20) as the boundary line and away from the bottle mouth (51), and the outer side space (62) of the scraper lip (20) refers to the inner side space of the bottle body (50) with the scraper lip (20) as the boundary line and close to the bottle mouth (51).

2. The inner plug according to claim 1, characterized in that: The exhaust passage (12) is a one-way valve, and the flow direction of the exhaust passage (12) is from the inner space (61) of the scraper lip (20) to the outer space (62) of the scraper lip (20).

3. The inner plug according to claim 2, characterized in that: The exhaust passage (12) comprises a cutout, and the shape of the cutout comprises at least one of a straight line shape, a curved line shape and a spiral shape.

4. The inner plug according to claim 1, characterized in that: The exhaust passage (12) comprises a through hole, and the shape of the through hole comprises at least one of a strip hole, a circular hole and a polygonal hole.

5. The inner plug according to claim 1, characterized in that: The shape of the groove (11) includes at least one of a strip shape, an arc shape and a spiral shape.

6. The inner plug according to claim 1, characterized in that: The first end of the groove 11 is located between the first end and the second end of the plug body (10); after assembly, the second end of the groove (11) is located in the inner space (61) of the scraper lip (20), and the exhaust channel (12) is located above the scraper lip (20).

7. The inner plug according to any one of claims 1 to 6, characterized in that: The scraper lip (20) is arranged on the inner side wall between the first end and the second end of the plug body (10), and the scraper lip (20) is close to the second end of the plug body (10).

8. The inner plug according to claim 7, characterized in that: The scraper lip (20) extends radially inward along the inner wall of the plug body (10), the first end of the scraper lip (20) is fixedly connected to the inner wall of the plug body (10), the second end of the scraper lip (20) is a free end, and the second end of the scraper lip (20) is used for scraping.

9. The inner plug according to claim 7, characterized in that: The scraper lip (20) is funnel-shaped, the first end of the scraper lip (20) is located above the second end of the scraper lip (20), and the second end of the scraper lip (20) is gathered to form a scraper hole.

10. The inner plug according to claim 7, characterized in that: Take any two points on the scraper lip (20), the thicknesses of the scraper lip (20) 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.

11. The inner plug according to claim 7, characterized in that: Take any two points A and B on the scraper lip (20), if the distance between point A and the second end of the scraper lip (20) is smaller than the distance between point B and the second end of the scraper lip (20), then the thickness of the scraper lip (20) at point A is smaller than the thickness of the scraper lip (20) at point B.

12. The inner plug according to claim 7, characterized in that: The hardness of the plug body (10) is greater than the hardness of the scraper lip (20), and the plug body (10) and the scraper lip (20) are integrally formed injection molded parts.

13. The inner plug according to claim 7, characterized in that: The outer wall of the plug body (10) is provided with N fins (13), the distance between two adjacent fins (13) is equal, the plug body (10) is provided with the groove (11) between two adjacent fins (13), the groove (11) is arranged along the axial direction of the plug body (10), and the groove (11) extends to the second end of the plug body (10), wherein N≥2, and N is an integer.

14. A cosmetic container, characterized in that: It comprises the inner plug according to any one of claims 1 to 13, and also comprises an outer cover (30), a brush rod (40) and a bottle body (50), 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 (30), the second end of the brush rod (40) is fixedly connected to the brush head (41), and the outer cover (30) is detachably mounted on the bottle mouth (51) of the bottle body (50).

15. The cosmetic container according to claim 14, characterized in that: The first end of the plug body (10) extends radially outward to form a circle of convex edge (14), the outer wall of the plug body (10) is provided with a convex rib (15) and a fin (13), the inner wall of the bottle mouth (51) is provided with a groove (52) matching with the convex rib (15), the convex edge (14) is fitted to the bottle mouth (51) of the bottle body (50), and the fin (13) is fitted to the shoulder of the bottle body (50).

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