Cosmetic container comprising a middle bundle core assembly

Abstract

The application relates to a middle beam core assembly and a cosmetic container comprising the same, the middle beam core assembly comprising a middle beam, a screw rod barrel, a guide, an elastic piece and a nut, the middle beam and the guide being fixedly connected, the screw rod barrel and the nut being mutually screwed, the elastic piece being circumferentially fixedly sleeved on the nut, the guide being provided with first clamping teeth, the elastic piece being provided with second clamping teeth, at least one of the first clamping teeth and the second clamping teeth comprising a bottom surface, a first inclined surface and a second inclined surface, an included angle between the first inclined surface and the bottom surface being alpha 1, an included angle between the second inclined surface and the bottom surface being alpha 2, alpha 1 and alpha 2 being different acute angles. In the middle beam core assembly, different resistances are generated in the forward rotation and reverse rotation processes through cooperation between the first clamping teeth and the second clamping teeth, the use feeling of the product is improved, and the grade of the product is improved.

Description

Technical Field

[0001] This application relates to cosmetic packaging technology, specifically to a core assembly and a cosmetic container containing the core assembly. Background Technology

[0002] Currently, cosmetics have become an indispensable part of people's daily lives. For ease of carrying and use, cosmetics are packaged in cosmetic containers before leaving the factory. To meet the packaging needs of different types of cosmetics, these containers come in various forms, such as boxes, tubes, and bags. The central core is the most important component of tubular containers, consisting of a central core, piston, screw, and nut. As the nut rotates, it drives the screw and piston to reciprocate within the central core. Currently, the central core can rotate freely in both directions, resulting in a monotonous and unappealing user experience. Summary of the Invention

[0003] To overcome the above-mentioned defects, this application provides a middle core assembly, which has a first locking tooth and a second locking tooth that mesh with each other. During use, the cooperation between the first locking tooth and the second locking tooth achieves the purpose of generating different resistances during forward and reverse rotation, thereby improving the user experience of the product and enhancing its quality.

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

[0005] A core assembly, characterized in that it comprises a core, a screw barrel, a guide, an elastic element, and a nut, wherein the core and the guide are fixedly connected, the screw barrel and the nut are screwed together, the elastic element is circumferentially fixedly sleeved on the nut, the guide includes a first retaining tooth, and the elastic element includes a second retaining tooth that meshes with the first retaining tooth. At least one of the first and second retaining teeth includes a bottom surface, a first inclined surface, and a second inclined surface. The angle between the first inclined surface and the bottom surface is α1, and the angle between the second inclined surface and the bottom surface is α2. Both α1 and α2 are acute angles, and α1 and α2 are not equal.

[0006] Optionally, the first and second locking teeth have the same structure, the upper surfaces of the first and second inclined surfaces are planes or curved surfaces, and α1 < α2.

[0007] Optionally, when the first and second locking teeth are engaged, the first inclined surface of the first locking tooth and the first inclined surface of the second locking tooth are in contact with each other, and the second inclined surface of the first locking tooth and the second inclined surface of the second locking tooth are in contact with each other. When the cosmetic material is unscrewed, the first inclined surface of the second locking tooth slides along the first inclined surface of the first locking tooth and gradually disengages from each other, or when the cosmetic material is unscrewed, the second inclined surface of the second locking tooth slides along the second inclined surface of the first locking tooth and gradually disengages from each other.

[0008] Optionally, the first locking teeth are arranged uniformly and continuously along the circumference of the guide member, and the second locking teeth are arranged uniformly and spaced apart along the circumference of the elastic member.

[0009] Optionally, the number of the first locking teeth is N times the number of the second locking teeth, or the number of the second locking teeth is N times the number of the first locking teeth, where N is an integer from 1 to 10.

[0010] Optionally, the number of the first locking teeth is 6 and the number of the second locking teeth is 3, or the number of the first locking teeth is 3 and the number of the second locking teeth is 6.

[0011] Optionally, the screw barrel includes a screw and a piston that are fixedly connected, wherein the screw and the piston are integrally formed, or the screw and the piston are separate structures.

[0012] Optionally, the first locking tooth is disposed on the inner sidewall of the guide member, or the guide member includes a ratchet ring, the first locking tooth is disposed on the lower end face of the ratchet ring, and the ratchet ring is fixedly installed on the inner sidewall of the guide member by a rib.

[0013] Optionally, the elastic element includes a retaining ring and a spring, the second retaining tooth is disposed on the upper end face of the retaining ring, the retaining ring is circumferentially fixedly mounted on the nut by a rib, the retaining ring and the spring are integrally formed plastic parts, or the retaining ring and the spring are separate structures, and the spring is sleeved on the nut.

[0014] This application also provides a cosmetic container, including the aforementioned core assembly, cap assembly, and bottom assembly. The core assembly is installed inside the bottom assembly, and the bottom assembly is capable of rotating the nut. The cap assembly is detachably fitted onto the bottom assembly.

[0015] The beneficial effects of this application are as follows: The core assembly includes a core bundle, a screw barrel, a guide member, an elastic member, and a nut. The core bundle and the guide member are fixedly connected, the screw barrel and the nut are screwed together, and the elastic member is circumferentially fixedly fitted onto the nut. The guide member has a first retaining tooth, and the elastic member has a second retaining tooth that meshes with the first retaining tooth. The first and second retaining teeth have a first inclined surface and a second inclined surface, ensuring that the nut can rotate both clockwise and counterclockwise. Furthermore, the slopes of the first and second inclined surfaces are different, resulting in different resistances during clockwise and counterclockwise rotation to meet different customer needs. This core assembly has fewer components and a simpler structure, reducing product manufacturing costs and assembly difficulty. The interaction between the first retaining tooth on the guide member and the second retaining tooth on the elastic member creates a regular, bouncy feel during use, facilitating operation and control. Different resistances are generated during the unscrewing and retraction of cosmetic materials, improving the user experience and enhancing the product's quality. Attached Figure Description

[0016] Figure 1 This is an exploded view of the core assembly in Embodiment 1 of this application;

[0017] Figure 2 This is a schematic diagram of the screw barrel structure in Embodiment 1 of this application;

[0018] Figure 3 This is a schematic diagram of the elastic element in Embodiment 1 of this application;

[0019] Figure 4 This is an exploded view of the core assembly in Embodiment 2 of this application;

[0020] Figure 5 This is a schematic diagram of the ratchet ring in Embodiment 2 of this application;

[0021] Figure 6 This is a schematic diagram of the retaining ring structure in Embodiment 2 of this application;

[0022] Figure 7 This is an exploded view of the screw barrel in Embodiment 2 of this application;

[0023] Figure 8 This is a schematic diagram of the metal spring in Embodiment 2 of this application;

[0024] Figure 9 This is a schematic diagram of the plastic spring in Embodiment 2 of this application;

[0025] Figure 10 This is a schematic diagram of the structure of the core assembly in Embodiment 2 of this application;

[0026] Figure 11 This is an exploded view of the core assembly in Embodiment 3 of this application;

[0027] Figure 12 This is one of the structural schematic diagrams of the core assembly in Embodiment 3 of this application;

[0028] Figure 13 This is the second schematic diagram of the structure of the core assembly in Embodiment 3 of this application;

[0029] Figure 14 This is one of the operation flowcharts for the core assembly in Embodiment 3 of this application;

[0030] Figure 15 This is the second flowchart of the operation of the core assembly in Embodiment 3 of this application;

[0031] Figure 16 This is a schematic diagram of the structure of the cosmetic container in Embodiment 2 of this application;

[0032] Figure 17 This is an exploded view of the cosmetic container in Embodiment 2 of this application;

[0033] Figure 18 This is one of the usage states of the cosmetic container in Embodiment 2 of this application;

[0034] Figure 19 This is the second illustration of the cosmetic container in use in Embodiment 2 of this application;

[0035] Figure 20 This is the third illustration of the cosmetic container in use in Embodiment 2 of this application;

[0036] In the diagram: 10-Middle ball, 20-Screw barrel, 21-Screw, 22-Piston, 30-Guide, 31-Ratchet ring, 32-First retaining tooth, 33-First inclined plane, 34-Second inclined plane, 40-Elastic element, 41-Retaining ring, 42-Second retaining tooth, 43-Spring, 50-Nut, 60-Cap assembly, 61-Outer cap, 62-Inner cap, 63-First weight, 70-Bottom assembly, 71-Outer bottom, 72-Inner bottom, 73-Second weight, 74-Outer middle ring, 75-Inner middle ring, 76-Cosmetic material. Detailed Implementation

[0037] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of the terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0039] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0040] like Figure 1-20As shown, a core assembly includes a core bundle 10, a screw cylinder 20, a guide member 30, an elastic member 40, and a nut 50. The core bundle 10 and the guide member 30 are fixedly connected. The screw cylinder 20 and the nut 50 are screwed together. The elastic member 40 is circumferentially fixedly sleeved on the nut 50. The guide member 30 includes a first retaining tooth 32, and the elastic member 40 includes a second retaining tooth 42 that meshes with the first retaining tooth 32. At least one of the first retaining tooth 32 and the second retaining tooth 42 includes a bottom surface, a first inclined surface 33, and a second inclined surface 34. The angle between the first inclined surface 33 and the bottom surface is α1, and the angle between the second inclined surface 34 and the bottom surface is α2. Both α1 and α2 are acute angles, and α1 and α2 are not equal. In this application, the screw barrel 20 and the nut 50 are screwed together, with the screw barrel 20 located inside the nut 50. The guide member 30 and the central bundle 10 are sleeved on the outside of the screw barrel 20 and the nut 50. The nut 50 extends out of the guide member 30. When the nut 50 rotates, it can drive the screw barrel 20 to move up and down along the central bundle 10, causing the cosmetic material inside the screw barrel 20 to extend or retract into the central bundle. The elastic member 40 is sleeved on the outer wall of the nut 50, and the elastic member 40 is circumferentially fixed with the nut 50, meaning that when the nut 50 rotates, it can drive the elastic member 40 to rotate synchronously. Figure 1 and Figure 3 As shown, the inner wall of the elastic element 40 has a raised rib, and the outer wall of the nut 50 has a groove. When the elastic element 40 is fitted onto the nut 50, the raised rib is precisely installed in the groove, thus fixing the elastic element 40 and the nut 50 circumferentially but allowing axial movement. Of course, other methods can also be used to fix the two circumferentially, such as having interlocking raised ribs on both the elastic element and the nut. During assembly, such as... Figure 14 and Figure 15 As shown, the first locking tooth 32 on the guide member 30 and the second locking tooth 42 on the elastic member 40 mesh with each other. When in use, a sound will be made when the second locking tooth 42 passes over the first locking tooth 32. The user can judge the rotation angle by the sound, thereby controlling the product operation process more accurately and improving the user's comfort.

[0041] The statement that at least one of the first locking teeth 32 and the second locking tooth 42 includes a bottom surface, a first inclined surface 33, and a second inclined surface 34 means that there are three possible scenarios: First, the first locking tooth 32 includes a bottom surface, a first inclined surface 33, and a second inclined surface 34, and the structure of the second locking tooth 42 is not limited; Second, the second locking tooth 42 includes a bottom surface, a first inclined surface 33, and a second inclined surface 34, and the structure of the first locking tooth 32 is not limited; Third, both the first locking tooth 32 and the second locking tooth 42 include a bottom surface, a first inclined surface 33, and a second inclined surface 34.

[0042] like Figure 3 and Figure 6As shown, taking the second locking tooth 42 as an example, the second locking tooth 42 is a protrusion that protrudes upward along the axial direction of the upper surface of the elastic member 40. The bottom surface of the second locking tooth 42 is the upper surface of the elastic member 40 where the second locking tooth 42 covers. The first inclined surface 33 and the second inclined surface 34 are two slopes. The angle between the first inclined surface 33 and the bottom surface is specifically the angle between the central axis of the first inclined surface 33 and the central axis of the bottom surface. The angle between the second inclined surface 34 and the bottom surface is specifically the angle between the central axis of the second inclined surface and the central axis of the bottom surface. α1 and α2 are both acute angles, that is, the first inclined surface and the second inclined surface are gentle slopes, thus ensuring that the nut 50 can rotate both clockwise and counterclockwise. α1 and α2 are not equal, that is, α1 > α2 or α1 < α2, which ensures that the slope of the first inclined surface and the slope of the second inclined surface are different, so that the resistance of the nut when rotating clockwise and counterclockwise is different, in order to meet the different needs of customers.

[0043] The structures of the first locking tooth 32 and the second locking tooth 42 can be different. For example, the first locking tooth 32 may include a bottom surface, a first inclined surface 33, and a second inclined surface 34, while the second locking tooth 42 may be a common protrusion structure, or vice versa. Optionally, such as Figure 14 and Figure 15 As shown, the first locking tooth 32 and the second locking tooth 42 have the same structure. The upper surfaces of the first inclined surface 33 and the second inclined surface 34 are either flat or curved, where α1 < α2. In this embodiment, both the first locking tooth 32 and the second locking tooth 42 include a bottom surface, a first inclined surface 33, and a second inclined surface 34. The meaning of the upper surfaces of the first inclined surface 33 and the second inclined surface 34 being either flat or curved is as follows: the upper surfaces of the first inclined surface 33 and the second inclined surface 34 are flat, or the upper surfaces of the first inclined surface 33 and the second inclined surface 34 are curved (the curved surface can be convex or concave); or the upper surface of the first inclined surface 33 is flat and the upper surface of the second inclined surface 34 is curved; or the upper surface of the first inclined surface 33 is curved and the upper surface of the second inclined surface 34 is flat. α1 < α2 indicates that the slope of the first inclined surface 33 is gentler than the slope of the second inclined surface 34. Here, α1 < α2 is defined to clearly illustrate the operation of the core assembly and is not intended as a structural limitation. In another embodiment, α1 > α2 is also acceptable.

[0044] like Figure 14 and Figure 15 As shown, when the first locking tooth 32 and the second locking tooth 42 are engaged, the first inclined surface of the first locking tooth 32 and the first inclined surface of the second locking tooth 42 are in contact with each other, and the second inclined surface of the first locking tooth 32 and the second inclined surface of the second locking tooth 42 are in contact with each other, as shown. Figure 14As shown, in one embodiment, when the nut 50 is rotated counterclockwise and the cosmetic material is unscrewed, the elastic element 40 rotates counterclockwise simultaneously. The first inclined surface of the second locking tooth 42 slides along the first inclined surface of the first locking tooth 32 and gradually disengages from each other. That is, the second locking tooth 42 passes over the first locking tooth 32 along the first inclined surface. Because the slope of the first inclined surface 33 is relatively gentle, the torque required to unscrew the cosmetic material is small. When the second locking tooth 42 passes over one of the first locking teeth 32, the elastic element 40 returns to its original state, and the second locking tooth 42 and the first locking tooth 32 are engaged again. Conversely, when the nut 50 is rotated clockwise and the cosmetic material is retracted into the middle bundle 10, the second locking tooth 42 passes over the first locking tooth 32 along the second inclined surface. Because the slope of the second inclined surface 34 is relatively steep, the torque required to retract the cosmetic material is large.

[0045] In another embodiment, such as Figure 15 As shown, when the nut 50 is rotated counterclockwise, the cosmetic material is unscrewed, and the second inclined surface of the second locking tooth 42 slides along the second inclined surface of the first locking tooth 32 and gradually disengages from it. That is, the second locking tooth 42 passes over the first locking tooth 32 along the second inclined surface. Because the slope of the second inclined surface 34 is steeper, a larger torque is required to unscrew the cosmetic material. Conversely, when the nut 50 is rotated clockwise, the cosmetic material is retracted into the middle bundle 10, and the second locking tooth 42 passes over the first locking tooth 32 along the first inclined surface. Because the slope of the first inclined surface 33 is gentler, a smaller torque is required to retract the cosmetic material.

[0046] like Figure 3-5 As shown, the first locking teeth 32 are arranged uniformly and continuously along the circumference of the guide member 30, and the second locking teeth 42 are arranged uniformly and intermittently along the circumference of the elastic member 40. The phrase "the first locking teeth 32 are arranged uniformly and continuously along the circumference of the guide member 30" means that adjacent first locking teeth 32 are connected end-to-end and all first locking teeth are the same size. Similarly, "the second locking teeth 42 are arranged uniformly and intermittently along the axial direction of the elastic member 40" means that adjacent second locking teeth 42 are spaced at the same distance and all second locking teeth are the same size. During use, the elastic member 40 is a moving part, while the guide member 30 is a stationary part. The distribution of fewer locking teeth on the elastic member and a larger number of locking teeth on the guide member ensures the stability of the middle core assembly during operation.

[0047] Wherein, the number of the first locking teeth 32 is N times the number of the second locking teeth 42, or the number of the second locking teeth 42 is N times the number of the first locking teeth 32, where N is an integer from 1 to 10. Optionally, the number of the first locking teeth 32 is twice the number of the second locking teeth 42, or the number of the second locking teeth 42 is twice the number of the first locking teeth 32; Optionally, such as Figure 3-5As shown, the number of first locking teeth 32 is 6, and the number of second locking teeth 42 is 3, or the number of first locking teeth 32 is 3 and the number of second locking teeth 42 is 6. This tooth distribution can ensure the stability of the middle core assembly during rotation, and also make the middle core produce a regular bouncy feel when rotating, which is convenient for operation and control.

[0048] like Figure 1-2 As shown, in Embodiment 1, the screw barrel 20 includes a screw 21 and a piston 22 fixedly connected. The screw 21 and piston 22 are integrally molded parts. By making the screw barrel 20 an integral structure, a set of molds can be saved, thereby reducing the product manufacturing cost; in Embodiment 2, as... Figure 4 and Figure 7 As shown, the screw 21 and piston 22 are separate structures. Figure 4 As shown, by designing the screw and piston as separate structures, the screw 21 can be made of a first material with higher hardness to meet the overall strength requirements of the screw 21, while the piston 22 can be made of a softer second material to meet the sealing requirements of the piston and the temperature requirements when filling materials such as lipstick, lip gloss, etc. Figure 7 As shown, the screw 21 and piston 22 can also be made of plastic material as needed.

[0049] like Figure 1 As shown, in Embodiment 1, the first locking tooth 32 is disposed on the inner sidewall of the guide member 30, that is, the first locking tooth 32 is directly formed on the inner sidewall of the guide member 30, which reduces the manufacturing cost of the product, reduces the number of parts, and simplifies the installation process; in Embodiment 2, as Figure 4 and Figure 5 As shown, the guide member 30 includes a ratchet ring 31, and a first retaining tooth 32 is disposed on the lower end face of the ratchet ring 31. The ratchet ring 31 is fixedly installed on the inner side wall of the guide member 30 by a rib. In this embodiment, the ratchet ring 31 is an independent component. The first retaining tooth 32 is designed on the ratchet ring 31, and then the ratchet ring 31 is installed on the inner wall of the guide member 30, thereby facilitating the forming of the irregularly shaped first retaining tooth 32.

[0050] like Figure 1 and Figure 3 As shown, in Embodiment 1, the elastic element 40 includes a retaining ring 41 and a spring 43. A second retaining tooth 42 is disposed on the upper end face of the retaining ring 41. The retaining ring 41 is circumferentially fixed to the nut 50 by a rib. The retaining ring 41 and the spring 43 are integrally molded plastic parts, meaning the elastic element 40 is an integrally molded plastic part. This not only saves on a set of molds and reduces product manufacturing costs, but also ensures that all products are made of plastic. For example, the screw barrel 20, guide 30, elastic element 40, and nut 50 are all made of polybutylene terephthalate (PBT), facilitating product recycling. In Embodiment 2, as... Figure 4 and Figure 6-9 As shown, the retaining ring 41 and the spring 43 are separate structures, with the spring 43 sleeved on the nut 50. Wherein, as... Figure 8 As shown, spring 43 can be a traditional metal spring, and the middle spring 10 can be an aluminum middle spring, reducing the product manufacturing cost, or as... Figure 9 As shown, spring 43 can also be made of plastic to facilitate product recycling.

[0051] It should be noted that the screw barrel 20 can be a one-piece or separate structure, the guide member 30 can be a one-piece or separate structure, and the elastic member 40 can be a one-piece or separate structure. These six different component structures can be freely combined. In Example 1, as... Figure 1 As shown, the screw barrel 20, guide member 30, and elastic member 40 are all integral structures; in embodiment 2, as... Figure 4 As shown, the screw barrel 20, guide member 30, and elastic member 40 are all separate structures; in embodiment 3, as... Figure 11-13 As shown, the screw barrel 20 and the guide 30 are both integral structures, while the elastic element 40 is a separate structure; of course, there can be other combinations, which will not be described one by one here.

[0052] like Figure 16-20 As shown, a cosmetic container includes a central core assembly, a cap assembly 60, and a bottom assembly 70. The central core assembly is installed inside the bottom assembly 70, and the bottom assembly 70 can rotate a nut 50. The cap assembly 60 is detachably fitted onto the bottom assembly 70. The cap assembly 60 includes an outer cap 61 and an inner cap 62 fixedly installed inside the outer cap 61. A first weight 63 is provided between the outer cap 61 and the inner cap 62. The bottom assembly 70 includes an outer bottom 71, an inner bottom 72, a second weight 73, an outer middle ring 74, and an inner middle ring 75. The inner bottom 72 is fixedly installed inside the outer bottom 71. The second weight 73 is installed inside the nut 50. The nut 50 is circumferentially fixedly connected to the inner bottom 72 by a rib. The inner middle ring 75 is fixedly installed inside the outer middle ring 74. The outer middle ring 74 is installed between the outer bottom 71 and the inner bottom 72. The inner middle ring 75 is fixedly sleeved on the central core 10. In use, the user removes the cap assembly 60, as shown in the image. Figure 19 As shown, at this time, the cosmetic material 76, such as lipstick, lip gloss, etc., is completely retracted into the middle assembly 10. Rotating the bottom assembly 70 causes the nut 50 to rotate, which in turn drives the cosmetic material inside the piston 22 to be ejected for the user's use. Figure 20 As shown, at this time, the cosmetic material 76 is fully extended from the middle bundle 10; the user can twist the cosmetic material to different heights as needed.

[0053] It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this patent application shall be determined by the appended claims.

Claims

1. A mid-beam core assembly, characterized in that: The assembly includes a central beam (10), a screw barrel (20), a guide (30), an elastic element (40), and a nut (50). The central beam (10) and the guide (30) are fixedly connected. The screw barrel (20) and the nut (50) are screwed together. The elastic element (40) is circumferentially fixedly sleeved on the nut (50). The guide (30) includes a first locking tooth (32). The elastic element (40) includes a second locking tooth (42) that meshes with the first locking tooth (32). At least one of the first locking tooth (32) and the second locking tooth (42) includes a bottom surface, a first inclined surface (33), and a second inclined surface (34). The angle between the first inclined surface (33) and the bottom surface is α1, and the angle between the second inclined surface (34) and the bottom surface is α2. Both α1 and α2 are acute angles, and α1 and α2 are not equal. The first locking tooth (32) and the second locking tooth (42) have the same structure. The upper surfaces of the first inclined surface (33) and the second inclined surface (34) are planes or curved surfaces. The α1 < the α2. When the first locking tooth (32) and the second locking tooth (42) are engaged, the first inclined surface of the first locking tooth (32) and the first inclined surface of the second locking tooth (42) are in contact with each other, and the second inclined surface of the first locking tooth (32) and the second inclined surface of the second locking tooth (42) are in contact with each other. When the cosmetic material is unscrewed, the first inclined surface of the second locking tooth (42) slides along the first inclined surface of the first locking tooth (32) and gradually disengages from each other, or when the cosmetic material is unscrewed, the second inclined surface of the second locking tooth (42) slides along the second inclined surface of the first locking tooth (32) and gradually disengages from each other. The first locking teeth (32) are arranged uniformly and continuously along the circumference of the guide (30), and the second locking teeth (42) are arranged uniformly and spaced apart along the circumference of the elastic member (40). The number of the first locking teeth (32) is N times the number of the second locking teeth (42), or the number of the second locking teeth (42) is N times the number of the first locking teeth (32), where N is an integer from 1 to 10; The elastic element (40) includes a retaining ring (41) and a spring (43). The second retaining tooth (42) is disposed on the upper end face of the retaining ring (41). The retaining ring (41) is circumferentially fixedly installed on the nut (50) by a rib. The retaining ring (41) and the spring (43) are integrally formed plastic parts, or the retaining ring (41) and the spring (43) are separate structures. The spring (43) is sleeved on the nut (50).

2. The mid-beam core assembly according to claim 1, characterized in that: The number of the first locking teeth (32) is 6, and the number of the second locking teeth (42) is 3, or the number of the first locking teeth (32) is 3 and the number of the second locking teeth (42) is 6.

3. The middle core assembly according to any one of claims 1-2, characterized in that: The screw barrel (20) includes a screw (21) and a piston (22) that are fixedly connected. The screw (21) and the piston (22) are integrally formed parts, or the screw (21) and the piston (22) are separate structures.

4. The middle core assembly according to any one of claims 1-2, characterized in that: The first locking tooth (32) is disposed on the inner side wall of the guide member (30), or the guide member (30) includes a ratchet ring (31), the first locking tooth (32) is disposed on the lower end face of the ratchet ring (31), and the ratchet ring (31) is fixedly installed on the inner side wall of the guide member (30) by a rib.

5. A cosmetic container, characterized in that: The device includes the middle core assembly, cover assembly (60) and bottom assembly (70) as described in any one of claims 1-4, wherein the middle core assembly is installed inside the bottom assembly (70) and the bottom assembly (70) is capable of rotating the nut (50), and the cover assembly (60) is pluggably fitted onto the bottom assembly (70).

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