Easy-to-open and close cosmetic containers and cosmetic packaging.

Abstract

This application relates to a cosmetic container and cosmetic container that are easy to open and close. The cosmetic container includes an inner lid, a middle ring, and a powder container. The powder container is fixedly mounted within the middle ring, and a sealing ring is fixedly provided on the inner lid. The sealing ring is made of an elastic material, and its hardness is less than that of the middle ring. The sealing ring is used to seal the middle ring. The sealing ring is provided with a relief groove, and in the process of opening and closing the inner lid relative to the middle ring, the sealing ring can deform into the relief groove. In this application, by providing a relief groove in the sealing ring, the sealing ring can deform and retract during the opening and closing of the inner lid, thereby reducing the difficulty of opening and closing the inner lid and improving the user's consumption experience.

Description

Technical Field

[0001] This application relates to cosmetic packaging technology, specifically to a cosmetic inner container and a cosmetic container that are easy to open and close.

Background Art

[0002] In conventional cosmetic containers, in order to ensure the sealed storage of materials, the inner lid and the middle ring are sealed by a sealing ring. However, during the process of the inner lid opening and closing with respect to the middle ring, since the sealing ring and the middle ring are in an interference fit state, the difficulty of opening and closing the inner lid increases, and the wear between the sealing ring and the middle ring is serious during the opening and closing process of the inner lid, which is likely to cause a decrease in the sealing performance of the sealing ring.

Summary of the Invention

Problems to be Solved by the Invention

[0003] To overcome the above deficiencies, this application provides a cosmetic inner container that is easy to open and close. In this cosmetic inner container, a relief groove is provided in the sealing ring, and during the opening and closing of the inner lid, the sealing ring can deform and retreat, thus reducing the difficulty of opening and closing the inner lid and enhancing the user's consumption experience.

Means for Solving the Problems

[0004] The technical means adopted by this application to solve its technical problems are as follows. A cosmetic inner container that is easy to open and close, including an inner lid, a middle ring, and a powder container. The powder container is fixedly attached inside the middle ring, and a sealing ring is fixedly provided on the inner lid. The sealing ring is made of an elastic material, and the hardness of the sealing ring is smaller than the hardness of the middle ring. The sealing ring is used to seal the middle ring. A relief groove is provided in the sealing ring, and during the process of the inner lid opening and closing with respect to the middle ring, the sealing ring can deform into the relief groove.

[0005] The seal ring optionally includes an annular structure with open upper and lower ends. The inner wall of the seal ring is coupled to the outer wall of the inner lid. The longitudinal cross-section of the inner wall of the seal ring includes an arc segment and a first straight segment connected to each other, the arc segment being located above the first straight segment.

[0006] Selectively, the tangent to the arc segment is a straight line K, and the angle between the straight line K and the first straight line segment is a, where a is an obtuse angle.

[0007] Selectively, the relief groove includes a first side wall and a second side wall, the longitudinal section of the first side wall includes a second straight segment, the longitudinal section of the second side wall includes a third straight segment, the second straight segment is arranged parallel to the first straight segment, the third straight segment is arranged parallel to the tangent to the arc segment, and the extension of the second straight segment intersects the extension of the third straight segment.

[0008] The relief groove is selectively configured to have a columnar annular structure, and is arranged coaxially with the seal ring.

[0009] Selectively, the relief groove is a blind groove, the upper end of the relief groove is a closed end, and the lower end of the relief groove is an open end.

[0010] Selectively, there is an airtight joint region between the seal ring and the intermediate ring, the maximum outer diameter of the seal ring is d1, the minimum inner diameter of the intermediate ring is d2, and both the location of the maximum outer diameter of the seal ring and the location of the minimum inner diameter of the intermediate ring are located within the airtight joint region, where d1 > d2, and the difference between d1 and d2 is 0.1 mm to 0.5 mm.

[0011] Selectively, the outer wall of the seal ring extends radially outward to form an annular projection, the inner wall of the middle ring is recessed inward to form an annular groove, the annular projection is joined to the annular groove by interference fit, and the annular projection and the annular groove form an airtight joint region.

[0012] The sealing ring is optionally positioned on the lower end surface of the inner lid, and the inner lid and the sealing ring are integrally molded by two-color injection molding.

[0013] When the inner lid is selected to cover the middle ring, an exhaust passage is formed between the seal ring and the middle ring, and this exhaust passage is used for the flow of gas between the inside and outside of the middle ring.

[0014] The intermediate ring may optionally be fixedly provided with a first cylindrical body and a second cylindrical body, the second cylindrical body located outside the first cylindrical body, the seal ring being airtightly joined to the inner wall of the first cylindrical body, and the second cylindrical body and the inner lid being engaged and fixed.

[0015] The present invention further provides a cosmetic container, the cosmetic container comprising a cosmetic inner container, a bottom assembly detachably connected to the cosmetic inner container, and an outer lid rotatably attached to the bottom assembly via a second hinge assembly and capable of covering the inner lid. [Effects of the Invention]

[0016] The beneficial effects of this application are as follows: 1) In this invention, the seal ring is made of an elastic material and has a relief groove, providing the seal ring with space to move elastically. When the inner lid is closed, the middle ring presses against the outer wall of the seal ring, causing the seal ring to deform and retract into the relief groove, reducing the frictional force between the seal ring and the middle ring, and thus reducing the difficulty of closing the inner lid. When the inner lid is opened, the seal ring can similarly deform and retract. Therefore, in this invention, a relief groove is provided in the seal ring, allowing the seal ring to deform and retract during the opening and closing of the inner lid, thereby reducing the difficulty of opening and closing the inner lid, improving the user experience, and at the same time reducing the frictional force between the seal ring and the middle ring, thereby improving the sealing effect of the seal ring and extending the service life of the seal ring. 2) In this invention, an exhaust passage is provided between the seal ring and the intermediate ring, and the exhaust passage is used for the circulation of gas between the inside and outside of the intermediate ring. During the closing process of the inner lid, the air between the seal ring and the intermediate ring can be discharged in a timely manner through the exhaust passage, and during the opening process of the inner lid, outside air enters the area between the intermediate ring and the seal ring through the exhaust passage, thereby eliminating the pressure difference between the inside and outside of the area between the seal ring and the intermediate ring, and facilitating the smooth opening and closing of the inner lid. [Brief explanation of the drawing]

[0017] [Figure 1] This is a schematic diagram (part 1) of the structure of the cosmetic container in Example 1 of the present application. [Figure 2] This is a magnified view of area A in Figure 1. [Figure 3] This is a schematic diagram (part 2) of the structure of the cosmetic container in Example 1 of the present invention. [Figure 4] This is a magnified view of area B in Figure 3. [Figure 5] This is an exploded view of the cosmetic container in Example 1 of the present application. [Figure 6] This is the first assembly diagram of the inner lid and middle ring in Embodiment 1 of the present application. [Figure 7] This is the second assembly diagram of the inner lid and middle ring in Embodiment 1 of the present application. [Figure 8]It is a schematic diagram of the structure of the inner lid in Example 1 of the present application, Part 1. [Figure 9] It is a schematic diagram of the structure of the inner lid in Example 1 of the present application, Part 2. [Figure 10] It is a schematic diagram of the structure of the inner lid in Example 1 of the present application, Part 3. [Figure 11] It is a schematic diagram of the structure of the middle ring in Example 1 of the present application, Part 1. [Figure 12] It is a schematic diagram of the structure of the middle ring in Example 1 of the present application, Part 2. [Figure 13] It is a schematic diagram of the structure of the powder container in Example 1 of the present application, Part 1. [Figure 14] It is a schematic diagram of the structure of the powder container in Example 1 of the present application, Part 2. [Figure 15] It is a schematic diagram of the structure of the cosmetic container in Example 2 of the present application. [Figure 16] It is an enlarged view of location C in Figure 15. [Figure 17] It is a schematic diagram of the structure of the cosmetic container in Example 3 of the present application. [Figure 18] It is a schematic diagram of the structure of the cosmetic container in Example 4 of the present application.

Modes for Carrying Out the Invention

[0018] Hereinafter, in connection with the examples of the present application, the technical aspects in the examples of the present application will be clearly and fully described. Obviously, the examples described in the present application are only some examples of the present application, not all examples. Based on the examples in the present application, all other examples obtained by those skilled in the art without creative labor belong to the protection scope of the present application.

[0019] Furthermore, the terms "First," "Second," etc., in the specification, claims, and drawings of this application are not intended to describe a specific order or priority, but rather to distinguish similar objects. It should be understood that objects used in this manner are interchangeable where appropriate, so that the embodiments of this application described herein may be carried out, for example, in an order other than those illustrated or described herein. Moreover, the terms "includes" and "has," and all their variations, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus including a series of steps or units may include steps or units not explicitly listed, or other steps or units specific to those processes, methods, products, or apparatus.

[0020] For the sake of clarity, spatial relative terms such as "on top of," "above," "on the top surface of," and "on the top surface" are used here to describe the spatial positional relationship between one device or feature and another device or feature, as shown in the diagram. It should be understood that spatial relative terms are intended to allow for different orientations in use or operation other than the orientation described in the diagram. For example, if the device in the drawing is upside down, a device described as "above another device or structure" or "above another device or structure" may later be positioned as "below another device or structure" or "below another device or structure." Therefore, the exemplary term "above" may include two orientations: "above" and "below." The device may also be positioned in other different ways (90-degree rotation or other orientations), and the spatial relative descriptions used here should be appropriately explained.

[0021] Example 1: As shown in Figures 1-14, the cosmetic container includes a cosmetic inner container. The cosmetic inner container includes an inner lid 10, a middle ring 30, and a powder container 40. The powder container 40 is fixedly mounted inside the middle ring 30, and a seal ring 20 is fixedly provided on the inner lid 10. The seal ring 20 is made of an elastic material, and the hardness of the seal ring 20 is less than the hardness of the middle ring 30. The seal ring 20 is used to seal the middle ring 30 and achieve an airtight function of the powder container 40. Cosmetic materials are then placed inside the powder container 40. The seal ring 20 is provided with a relief groove 22. Optionally, the relief groove 22 extends to the outside of the seal ring 20. During the process of the inner lid 10 opening and closing on the middle wheel 30, that is, during the process of the inner lid 10 opening or closing on the middle wheel 30, the seal ring 20 can deform into the relief groove 22, thereby retracting from the middle wheel 30 and reducing the frictional force between the seal ring 20 and the middle wheel 30. After the inner lid 10 opens, the seal ring 20 returns to its original shape. Alternatively, after the inner lid 10 closes on the middle wheel 30, the seal ring 20 similarly restores itself to seal the middle wheel 30.

[0022] Examples of elastic materials include thermoplastic elastomers and various special saturated rubbers that cannot be vulcanized with sulfur. Here, thermoplastic elastomers include thermoplastic polyurethane elastomer rubber (TPU), thermoplastic polyester elastomer (TPEE), and styrene-butadiene-styrene block copolymer (SBS).

[0023] In this invention, the purpose of sealing the powder container is achieved by sealing the space between the inner lid and the middle ring using a sealing ring, thereby preventing the cosmetic material from being contaminated by prolonged contact with the outside air while stored in the container.

[0024] Since the seal ring 20 is made of an elastic material and has a relief groove 22, it provides the seal ring with space to move elastically. When the inner lid 10 is closed, the middle wheel presses against the outer wall of the seal ring, causing the seal ring to deform and retract into the relief groove 22, reducing the frictional force between the seal ring and the middle wheel, that is, reducing the difficulty of closing the inner lid. When the inner lid 10 is opened, the seal ring can similarly deform and retract. Therefore, in this invention, a relief groove is provided in the seal ring, allowing the seal ring to deform and retract during the opening and closing of the inner lid, thereby reducing the difficulty of opening and closing the inner lid, improving the user experience, and at the same time reducing the frictional force between the seal ring and the middle wheel, improving the sealing effect of the seal ring and extending the service life of the seal ring.

[0025] As shown in Figures 1 and 2, the seal ring 20 includes an annular structure with openings at both the upper and lower ends, and the inner wall of the seal ring 20 is connected to the outer wall of the inner lid 10. The longitudinal cross-section of the inner wall of the seal ring 20 includes an arc segment 23 and a first linear segment 24 that are connected to each other. The arc segment 23 is located above the first linear segment 24. As shown in Figures 1 and 2, if we define the direction in which the outer lid 50 is located as above the seal ring 20 and the direction in which the powder container 40 is located as below the seal ring 20, then the position of the arc segment 23 above the first linear segment 24 means that the arc segment 23 is closer to the outer lid 50 than the first linear segment 24. The longitudinal cross-section of the seal ring 20 refers to the cross-section passing through the axial centerline of the inner lid 10. The arc segment 23 is located at the upper end of the seal ring 20 and joins to the arcuate surface of the inner lid 10, while the first straight segment 24 is located at the lower end of the seal ring 20 and joins to the side surface of the inner lid 10. In other words, including the arc segment 23 and the first straight segment 24 in the longitudinal cross-section of the inner wall of the seal ring 20 is a configuration adapted to the outer wall of the inner lid 10, and is intended to ensure the bonding strength and sealing effect between the seal ring and the inner lid.

[0026] Selectively, the tangent to arc segment 23 is a straight line K, and the angle between line K and the first straight segment 24 is a, where a is an obtuse angle.

[0027] As shown in Figure 2, the relief groove 22 includes a first side wall and a second side wall. The longitudinal cross-section of the first side wall includes a second straight segment 25, and the longitudinal cross-section of the second side wall includes a third straight segment 26. The second straight segment 25 is arranged parallel to the first straight segment 24, and the third straight segment 26 is arranged parallel to the tangent to the arc segment 23, and the extension of the second straight segment 25 intersects the extension of the third straight segment 26. Selectively, the first side wall has a cylindrical surface shape, and the second side wall has a conical surface shape. By designing the relief groove 22 in this shape, the uniformity of the wall thickness of the seal ring can be increased, the difficulty of injection molding can be reduced, and the molding of the seal ring can be facilitated.

[0028] As shown in Figures 2 and 4, the relief groove 22 is a blind groove, with the upper end of the relief groove 22 being a closed end and the lower end of the relief groove 22 being an open end. The presence of the relief groove 22 allows the seal ring 20 to deform in the direction of the relief groove during the process of sealing the seal ring 20 to the middle ring 30, thereby facilitating the closing of the inner lid 10 to the middle ring and reducing the frictional force between the seal ring 20 and the middle ring 30. After the inner lid 10 is coupled to the middle ring 30, the seal ring 20 returns to its normal state to seal the middle ring 30.

[0029] There is an airtight joint region between the seal ring 20 and the intermediate wheel 30. The maximum outer diameter of the seal ring 20 is d1, and the minimum inner diameter of the intermediate wheel 30 is d2. Both the point of the maximum outer diameter of the seal ring 20 and the point of the minimum inner diameter of the intermediate wheel 30 are located within the airtight joint region, where d1 > d2, and the difference between d1 and d2 is 0.1 mm to 0.5 mm. In other words, the seal ring 20 and the intermediate wheel 30 are in an interference fit within the airtight joint region.

[0030] As shown in Figures 1 and 2, the outer wall of the seal ring 20 extends radially outward to form an annular projection 21, and the inner wall of the middle ring 30 is recessed inward to form an annular groove 34. The annular projection 21 is joined to the annular groove 34 by interference fit, and the annular projection 21 and the annular groove 34 form an airtight joint region. The interlocking annular projection 21 and the annular groove 34 further enhance the sealing effect of the seal ring 20.

[0031] As shown in Figures 8 to 10, the seal ring 20 is located on the lower end surface of the inner lid 10, and the inner lid 10 and the seal ring 20 are integrally molded by two-color injection molding. Because the inner lid 10 and the seal ring 20 are integrally molded by injection molding, the bonding strength between the inner lid and the seal ring is high, resulting in a high sealing effect.

[0032] When the inner lid 10 covers the middle ring 30, an exhaust passage is formed between the seal ring 20 and the middle ring 30, and this exhaust passage is used for the flow of gas between the inside and outside of the middle ring 30. There is an airtight joint region between the seal ring 20 and the middle ring 30, and the powder container 40 is located below the airtight joint region, and the exhaust passage is located above the airtight joint region, ensuring that the exhaust passage does not affect the airtight effect between the seal ring 20 and the middle ring 30. The exhaust passage includes an exhaust groove 33. In one possible embodiment, the outer wall of the seal ring 20 has an exhaust groove 33 opened in the circumferential direction. In another possible embodiment, as shown in Figures 11 and 12, the inner wall of the middle ring 30 has an exhaust groove 33 opened in the circumferential direction. During the closing process of the inner lid 10, air between the seal ring 20 and the middle ring 30 can be discharged in a timely manner through the exhaust passage. During the opening process of the inner lid, outside air enters the area between the middle ring 30 and the seal ring 20 through the exhaust passage. This eliminates the pressure difference between the inside and outside of the area between the sealing ring 20 and the middle ring 30, facilitating the smooth opening and closing of the inner lid 10.

[0033] As shown in Figures 11 and 12, a first cylindrical body 31 and a second cylindrical body 32 are fixedly provided on the middle wheel 30, the second cylindrical body 32 is located outside the first cylindrical body 31, the seal ring 20 is airtightly joined to the inner wall of the first cylindrical body 31, and the second cylindrical body 32 and the inner lid 10 are engaged and fixed. Optionally, an exhaust passage is located between the seal ring 20 and the inner wall of the first cylindrical body 31. Optionally, an exhaust groove 33 is provided in the inner wall of the first cylindrical body 31. As shown in Figure 6, there is a gap between the first cylindrical body 31 and the second cylindrical body 32, the inner lid 10 is inserted into the gap, the outer wall of the inner lid 10 engages with the inner wall of the second cylindrical body 32, and the outer wall of the seal ring 20 is airtightly joined to the inner wall of the first cylindrical body 31.

[0034] As shown in Figures 1, 6, and 7, the inner lid 10 is rotatably mounted on the middle wheel 30 via a first hinge assembly, and the inner lid 10 and the middle wheel 30 are engaged and fixed together, and the powder container 40 and the middle wheel 30 are engaged and fixed together. The first hinge assembly includes a first hinge 11, a second hinge 35, and a first hinge shaft 12. As shown in Figure 9, the first hinge 11 is fixedly mounted to the inner lid 10, and as shown in Figures 11 and 12, the second hinge 35 is fixedly mounted to the middle wheel 30. As shown in Figure 6, during assembly, after the first hinge 11 and the second hinge 35 are butted together, the first hinge shaft 12 is drilled into the first hinge 11 and the second hinge 35, rotatably connecting the inner lid 10 and the middle wheel 30. As shown in Figure 1, the inner lid 10 and the middle wheel 30 are engaged and fixed together by locking points and locking grooves, locking points and locking points, etc. The powder container 40 and the middle wheel 30 are engaged and fixed together by locking points and locking grooves, locking points and locking points, etc.

[0035] As shown in Figures 1 and 5, the cosmetic container further includes a bottom assembly that is removably connected to the cosmetic inner container, and an outer lid 50 that is rotatably attached to the bottom assembly via a second hinge assembly and can cover the inner lid 10.

[0036] As shown in Figures 1 and 5, the second hinge assembly includes a third hinge 51, a fourth hinge 71, and a second hinge shaft 52. As shown in Figure 5, the third hinge 51 is fixedly attached to the outer lid 50, and the fourth hinge 71 is fixedly attached to the outer bottom 70. As shown in Figure 1, during assembly, after the third hinge 51 and the fourth hinge 71 are butted together, the second hinge shaft 52 is drilled into the third hinge 51 and the fourth hinge 71, rotatably connecting the outer lid 50 and the outer bottom 70. Optionally, a mirror 54 is fixedly attached to the inside of the outer lid 50, and a puff for applying cosmetic materials is positioned on the inner lid 10.

[0037] As shown in Figures 1 and 5, the bottom assembly includes an outer bottom 70 and an inner bottom 60 fixedly mounted within the outer bottom 70, with the middle wheel 30 removably mounted inside the inner bottom 60. The inner bottom 60 and the outer bottom 70 are engaged and fixed by locking points and locking grooves, locking points and locking points, etc., and the middle wheel 30 and the inner bottom 60 are engaged and fixed by locking points and locking grooves, locking points and locking points, etc.

[0038] The inner lid 10, middle ring 30, and powder container 40 constitute the inner container. After the material in the powder container 40 is used up, the inner container can be removed and replaced with a new inner container for continued use, allowing other parts of the cosmetic container to be reused, resulting in energy savings, environmental friendliness, and cost savings. When assembling, first attach the inner container, then fill the powder container 40 with material, and after filling, attach the inner container to the bottom assembly. If a defect occurs due to an error during the material filling process, simply remove the powder container 40 separately and replace it with a new powder container.

[0039] The bottom surface of the powder container 40 can be partially exposed to the outside, or it can be completely exposed to the outside. When the bottom surface of the powder container 40 is partially exposed to the outside, the powder container 40 can be pushed upward from the bottom end of the container, allowing the entire inner container to be detached from the bottom assembly from above. When the bottom surface of the powder container 40 is completely exposed to the outside, the inner container can be pressed directly from above the container, allowing the entire inner container to be detached from the bottom assembly from below. Therefore, removing the inner container is very convenient.

[0040] In Embodiment 1, the outer cover 50 and the outer bottom 70 are engaged and fixed by an engagement assembly. As shown in Figures 1 and 5, the engagement assembly includes a button 72 and a groove 53. The button 72 is mounted inside the outer bottom 70 and is provided with a locking hook 73. The groove 53 is provided on the inner wall of the outer cover 50, and the locking hook 73 engages with the groove 53 to engage and fix the outer cover 50 and the outer bottom 70. An elastic piece is fixed to the button 72. When in use, pressing the button 72 deforms the elastic piece and further disengages the locking hook 73 from the groove 53, thereby opening the outer cover 50. When the button is released, the button 72 is reset by the elastic piece. A rear engagement member 74 is provided between the outer cover 50 and the outer bottom 70.

[0041] Example 2: As shown in Figures 15 and 16, this example differs from Example 1 in that the relief groove 22 has a columnar ring structure and is arranged coaxially with the seal ring 20. As shown in Figure 16, the longitudinal cross-section of the relief groove 22 is inverted U-shaped, resulting in a simple structure and easy grooving.

[0042] In Examples 3 and 4, the outer lid 50 and the outer bottom 70 are fixed together by an absorbent member. In Example 3, as shown in Figure 17, the adsorption assembly includes a first magnet 55 and a second magnet 75. The first magnet 55 is mounted inside the outer lid 50, and the second magnet 75 is mounted inside the outer bottom 70, and the outer lid 50 and the outer bottom 70 are fixed together by mutual attraction between the first magnet 55 and the second magnet 75. A mesh cloth 36, which is located above the powder container 40, is welded to the middle wheel 30. In this embodiment, the use of the first magnet 55 and the second magnet 75 instead of the conventional engaging member makes operation more convenient.

[0043] Example 4: As shown in Figure 18, the adsorption assembly includes a magnetic metal member 56 and a second magnet 75. The second magnet 75 is attached to either the outer lid 50 or the outer bottom 70, and the magnetic metal member 56 is attached to the other of the outer lid 50 or the outer bottom 70, and the outer lid 50 and the outer bottom 70 are adsorbed and fixed by mutual attraction between the second magnet 75 and the magnetic metal member 56. The magnetic metal member 56 is made of a ferromagnetic material. Ferromagnetic materials include materials such as iron, cobalt, and nickel. In this embodiment, the second magnet 75 and the magnetic metal member 56 are used instead of an engagement assembly. In Figure 13, the magnetic metal member 56 is attached inside the outer lid 50, and the second magnet 75 is attached to the outer bottom 70. Of course, the second magnet 75 may be attached inside the outer lid 50, and the magnetic metal member 56 may be attached inside the outer bottom 70.

[0044] In this application, the outer cover 50 and the outer bottom portion 70 are engaged and fixed by an engagement assembly or by suction and fixed by an adsorption assembly, so the connection method between the two is simple, reliable, low-cost, and easy to use.

[0045] Those skilled in the art should point out that several modifications and improvements can be made without departing from the concept of the present application, and that these fall within the scope of protection of the present application. Therefore, the scope of protection of the present application must be in accordance with the claims for registration of the utility model attached. [Explanation of symbols]

[0046] 10: Inner lid, 11: First hinge, 12: First hinge shaft, 20: Seal ring, 21: Annular projection, 22: Relief groove, 23: Arc segment, 24: First straight segment, 25: Second straight segment, 26: Third straight segment, 30: Middle wheel, 31: First cylinder, 32: Second cylinder, 33: Exhaust groove, 34: Annular groove, 35: Second hinge, 36: Mesh cloth, 40: Powder container, 50: Outer lid, 51: Third hinge, 52: Second hinge shaft, 53: Groove, 54: Mirror, 55: First magnet, 56: Magnetic metal member, 60: Inner bottom, 70: Outer bottom, 71: Fourth hinge, 72: Button, 73: Locking hook, 74: Rear engaging member, 75: Second magnet.

Claims

1. A cosmetic container that is easy to open and close, comprising an inner lid (10), a middle ring (30), and a powder container (40), wherein the powder container (40) is fixedly mounted inside the middle ring (30), a seal ring (20) is fixedly provided on the inner lid (10), the seal ring (20) is made of an elastic material and the hardness of the seal ring (20) is less than the hardness of the middle ring (30), the seal ring (20) is used to seal the middle ring (30), a relief groove (22) is provided on the seal ring (20), and the seal ring (20) can deform into the relief groove (22) during the process of opening and closing the inner lid (10) relative to the middle ring (30).

2. A cosmetic container that is easy to open and close, as described in claim 1, wherein the sealing ring (20) includes an annular structure with openings at both the upper and lower ends, the inner wall of the sealing ring (20) is connected to the outer wall of the inner lid (10), the longitudinal cross-section of the inner wall of the sealing ring (20) includes an arc segment (23) and a first straight segment (24) connected to each other, and the arc segment (23) is located above the first straight segment (24).

3. A cosmetic container that is easy to open and close, as described in claim 2, wherein the tangent to the arc segment (23) is a straight line K, and the angle between the straight line K and the first straight segment (24) is a, where a is an obtuse angle.

4. A cosmetic container that is easy to open and close according to claim 2, wherein the relief groove (22) includes a first side wall and a second side wall, the longitudinal cross-section of the first side wall includes a second straight segment (25), the longitudinal cross-section of the second side wall includes a third straight segment (26), the second straight segment (25) is arranged parallel to the first straight segment (24), the third straight segment (26) is arranged parallel to the tangent to the arc segment (23), and the extension of the second straight segment (25) intersects the extension of the third straight segment (26).

5. A cosmetic container that is easy to open and close, as described in claim 2, wherein the relief groove (22) has a columnar annular structure, and the relief groove (22) is arranged coaxially with the seal ring (20).

6. A cosmetic container that is easy to open and close, as described in claim 1, wherein the relief groove (22) is a blind groove, the upper end of the relief groove (22) is a closed end, and the lower end of the relief groove (22) is an open end.

7. A cosmetic container that is easy to open and close, as described in claim 1, wherein there is an airtight sealing region between the sealing ring (20) and the middle ring (30), the maximum outer diameter of the sealing ring (20) is d1, the minimum inner diameter of the middle ring (30) is d2, and both the location of the maximum outer diameter of the sealing ring (20) and the location of the minimum inner diameter of the middle ring (30) are located in the airtight sealing region, where d1 > d2, and the difference between d1 and d2 is 0.1 mm to 0.5 mm.

8. A cosmetic container that is easy to open and close, as described in claim 1, wherein the outer wall of the sealing ring (20) extends radially outward to form an annular projection (21), the inner wall of the middle ring (30) is recessed inward to form an annular groove (34), the annular projection (21) is joined to the annular groove (34) by interference fit, and the annular projection (21) and the annular groove (34) form an airtight joint region.

9. A cosmetic container that is easy to open and close according to any one of claims 1 to 8, wherein the sealing ring (20) is located on the lower end surface of the inner lid (10), and the inner lid (10) and the sealing ring (20) are integrally molded by two-color injection molding.

10. A cosmetic container that is easy to open and close according to any one of claims 1 to 8, wherein when the inner lid (10) covers the middle ring (30), an exhaust passage is formed between the sealing ring (20) and the middle ring (30), and the exhaust passage is used for the circulation of gas between the inside and outside of the middle ring (30).

11. A cosmetic container that is easy to open and close according to any one of claims 1 to 8, wherein a first cylindrical body (31) and a second cylindrical body (32) are fixedly provided on the middle ring (30), the second cylindrical body (32) is located on the outside of the first cylindrical body (31), the seal ring (20) is airtightly joined to the inner wall of the first cylindrical body (31), and the second cylindrical body (32) and the inner lid (10) are engaged and fixed together.

12. Cosmetic container, A cosmetic container according to any one of claims 1 to 11, A bottom assembly that is removably connected to the cosmetic container, A cosmetic container characterized by including an outer lid (50) that is rotatably attached to the bottom assembly via a second hinge assembly and can cover the inner lid (10).

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