A retractable mid-beam core

Abstract

This utility model relates to the field of cosmetic container technology and discloses a retractable central core. It includes: a central tube; a guide sleeve, partially disposed inside the central tube; a bead, including a support and a spiral post connected to the support, the spiral post extending into the guide sleeve; and a spiral assembly disposed within the guide sleeve and threadedly engaged with the spiral post. The spiral assembly drives the bead to extend and elastically retract under external force, ensuring the top of the bead is flush with the opening of the central tube. Through the combined use of the spiral assembly and the central tube, the pressure applied by the user during application automatically drives the entire mechanism to retract, aligning the top of the application with the opening of the central tube and simultaneously performing a massage action. This eliminates the need for secondary application or massage using fingers or other tools, simplifying the makeup process and resulting in more even application, a more natural makeup effect, and a more comfortable skin feel.

Description

Technical Field

[0001] This utility model relates to the field of cosmetic container technology, specifically to a retractable central core. Background Technology

[0002] Most cosmetics on the market today have a fixed structure for holding the product. To use them, the user must first twist out the product and apply it directly to a specific area of ​​the body, such as the lips or cheeks. However, these products are relatively simple, only providing basic application. After application, the user still needs to use their fingers or other tools to further blend the product to improve adhesion, color uniformity, and makeup longevity. Therefore, in practical use, they suffer from inconvenience, reliance on manual skill for makeup results, and an unsatisfactory user experience. Utility Model Content

[0003] The purpose of this invention is to provide a retractable middle core to address the aforementioned shortcomings in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A retractable mid-core includes: Middle bundle tube; A guide sleeve, part of which is disposed inside the middle bundle tube; A bead, comprising a support and a spiral post connected to the support, the spiral post extending into the guide sleeve; A spiral assembly is disposed within the guide sleeve and threadedly engages with the spiral column; The spiral assembly drives the bead to extend and retracts elastically under external force, so that the top of the bead remains flush with the opening of the middle tube.

[0005] As a further improvement of one embodiment of the present invention, the opening of the middle bundle tube is rounded.

[0006] As a further improvement of one embodiment of the present invention, the opening of the middle bundle tube is provided with a mating part.

[0007] As a further improvement of one embodiment of the present invention, the mating part includes an annular base and a flange connected to the annular base.

[0008] As a further improvement of one embodiment of the present invention, a plurality of locking blocks are provided on at least one end face of the flange.

[0009] As a further improvement of one embodiment of the present invention, a center cap adapted to the mating portion is also included.

[0010] As a further improvement of one embodiment of the present invention, the mid-beam cover is made of a metal material.

[0011] As a further improvement of one embodiment of the present invention, the spiral assembly includes a base, a spiral tube, and an elastic element; The base engages with the guide sleeve, the spiral tube is supported on the base, and the elastic element is disposed between the base and the spiral tube.

[0012] As a further improvement of one embodiment of the present invention, the base includes a platform and a locking portion and an extension portion extending from the platform; The engaging part is provided with a first engaging element, and the end of the guide sleeve is provided with a second engaging element that cooperates with the first engaging element.

[0013] As a further improvement of one embodiment of the present invention, the inner wall of the extension has a polygonal structure.

[0014] As a further improvement of one embodiment of the present invention, a support groove is provided at the opening of the extension.

[0015] As a further improvement of one embodiment of the present invention, the outer wall shape of the spiral tube is adapted to the inner wall shape of the extension.

[0016] As a further improvement of one embodiment of the present invention, the outer surface of the spiral tube is provided with a support block that cooperates with the support groove.

[0017] As a further improvement of one embodiment of the present invention, a limiting part is provided at one end of the spiral tube, and an internal thread is provided on the inner side wall of the limiting part.

[0018] As a further improvement of one embodiment of the present invention, the outer periphery of the spiral column is provided with an external thread that mates with the internal thread.

[0019] As a further improvement of one embodiment of the present invention, the bottom of the support has at least one through hole, and a material is disposed inside it.

[0020] This invention offers the following advantages: Through the combined use of the spiral assembly and the central tube, the pressure applied by the user during application automatically retracts the entire mechanism, aligning the top of the product with the opening of the central tube and simultaneously performing a massage motion. This eliminates the need for secondary application or massage using fingers or other tools, simplifying the makeup process and resulting in more even application, a more natural makeup effect, and a more comfortable skin feel. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the appearance structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the exploded structure of this utility model.

[0024] Figure 3 This is a schematic cross-sectional view of the material-free body structure of this utility model.

[0025] Figure 4 This is a schematic diagram of the present invention, showing a material body that elastically retracts and a structure in which the opening of the middle tube is flush with the material body.

[0026] Figure 5 This is a schematic diagram of the guide sleeve and its cross-sectional structure of the present invention.

[0027] Figure 6 This is a schematic diagram of the base structure from two perspectives of this utility model.

[0028] Figure 7 This is a schematic diagram of the spiral tube of this utility model and its cross-sectional structure.

[0029] Figure 8 This is a cross-sectional structural diagram of another embodiment of the present invention.

[0030] Figure 9 This is a schematic diagram of the mating part and the middle cover structure of another embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures: 100. Middle tube; 11. Mouth; 12. Material; 13. Fitting part; 131. Annular base; 132. Flange; 133. Locking block; 200. Guide sleeve; 21. Second locking element; 211. Protrusion; 212. Locking space; 300. Spiral assembly; 31. Spiral tube; 311. Limiting part; 312. Internal thread; 313. Support block; 32. Elastic element; 33. Base; 331. Platform; 3311. First locking element; 332. Locking part; 333. Extension part; 3331. Support groove; 400. Bead; 41. Support; 411. Through hole; 42. Spiral column; 500. Middle tube cover. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figures 1 to 9 As shown, this utility model provides a retractable central core, which mainly includes a central tube 100, a guide sleeve 200, a bead 400, and a spiral assembly 300.

[0034] The middle tube 100 is the external main frame of this embodiment, and is typically made of plastic injection molding in one piece. Its tube body is a hollow cylinder used to accommodate other components.

[0035] The opening 11 of the middle tube 100 has rounded edges, with a radius preferably between 0.3 mm and 0.8 mm, which completely eliminates sharp edges and ensures a smooth and comfortable contact with the skin without any scratching sensation during use.

[0036] The guide sleeve 200 is disposed inside the middle tube 100. Its upper end extends into the lower space of the middle tube 100. The lower end of the guide sleeve 200 is provided with a second engaging element 21. In this embodiment, the second engaging element 21 consists of two oppositely arranged protrusions 211, which together form an engaging space 212.

[0037] The bead 400 is used to support the product 12. The bead 400 includes a cup-shaped support 41 and a spiral post 42 integrally formed or fixedly connected to the center of the bottom of the support 41. The bottom of the support 41 has at least one through hole 411, and the inner cavity of the support 41 is used to fill and fix the product 12, such as lipstick, lip gloss, concealer, etc. The bottom of the product 12 is in contact with the outside air through the through hole 411, so that the product 12 can be easily removed from the support 41 when it is used up and needs to be replaced, or when the support 41 needs to be cleaned.

[0038] The spiral assembly 300 is used to achieve elastic telescopic function and is housed inside the guide sleeve 200. The spiral assembly 300 includes a base 33, which is made of engineering plastic or metal and includes a polygonal platform 331. An engaging portion 332 extends upward from the platform 331. A first engaging element 3311, such as a protrusion, is provided on the outer periphery of the engaging portion 332. The first engaging element 3311 engages with a second engaging element 21 (two opposing protrusions 211) at the lower end of the guide sleeve 200 and is placed in the engaging space 212, thereby detachably fixing the entire spiral assembly 300 inside the guide sleeve 200.

[0039] A cylindrical extension 333 extends upward from the engaging portion 332. The outer diameter of the extension 333 is smaller than that of the engaging portion 332, forming a stepped structure. The inner wall of the extension 333 is constructed as a polygonal structure, such as a quadrilateral or a hexagon, and a support groove 3331 is provided at its opening edge.

[0040] The spiral tube 31 is fitted inside the extension 333 of the base 33. The shape of its outer wall is adapted to the polygonal inner wall of the extension 333, so that the two can transmit torque and prevent the spiral tube 31 from spinning freely.

[0041] A protruding support block 313 is provided on the outer surface of the spiral tube 31 near the lower end. The support block 313 can be mounted in the support groove 3331 to limit the initial position or maximum stroke of the spiral tube 31. An annular limiting part 311 is provided at the upper end of the spiral tube 31, and an internal thread 312 is machined on the inner side wall of the limiting part 311.

[0042] The elastic element 32, preferably a spring, is sleeved around the extension 333 of the base 33. The upper end of the elastic element 32 abuts against the limiting part 311 of the spiral tube 31, and the lower end abuts against the base 331 of the base 33.

[0043] During assembly, first, the elastic element 32 and the spiral tube 31 are sequentially fitted onto the extension 333 of the base 33, allowing the support block 313 to fall into the support groove 3331. Then, the assembled component is pushed into the guide sleeve 200 from below, causing the first engaging element 3311 of the base 33 to engage with the second engaging element 21 of the guide sleeve 200. Next, the spiral post 42 of the bead 400 is screwed into the internal thread 312 of the spiral tube 31 from above. Finally, the guide sleeve 200 is inserted into the middle bundle tube 100, completing the assembly.

[0044] When in use, the rotating base 33 transmits the rotational force to the helical tube 31 after it through the polygonal structure of the extension 333. At the same time, the internal thread 312 of the helical tube 31 engages with the external thread of the helical column 42, which is converted into the upward linear motion of the ball 400, thereby pushing the material 12 out of the opening 11 of the middle tube 100 and putting it into use.

[0045] During application, the product 12 is aligned with the application area. Once the product 12 contacts the application area, the pressure is transmitted through the bead 400 to the spiral tube 31, overcoming the elasticity of the elastic element 32 and pushing the entire spiral tube 31 downwards along the extension 333 of the base 33. At this time, the bead 400 and the spiral tube 31 retract synchronously as a whole until the top of the product 12 is flush with the opening 11 of the middle tube 100. During this process, while the user applies the product 12, the flush opening 11 of the middle tube 100 also massages the skin, eliminating the need for secondary application or massage with fingers or other tools, thus simplifying the makeup application process.

[0046] After the external force is removed, the rebound force of the elastic element 32 pushes the spiral tube 31 to reset upward, thereby causing the bead 400 and the material 12 to return to the extended state.

[0047] In another embodiment, a mating portion 13 is provided at the opening 11. The mating portion 13 includes a radially outwardly extending annular base 131 and a flange 132 extending upward from the annular base 131. Further, a plurality of locking blocks 133 are provided on one end face (or both end faces) of the flange 132, arranged circumferentially at intervals. The locking blocks 133 are preferably trapezoidal, wedge-shaped, waist-shaped, or cylindrical, to facilitate engagement and positioning.

[0048] The center tube cover 500 covers the opening 11 of the center tube 100 through snap-fitting, press-fitting, welding, or gluing with the mating part 13. The center tube cover 500 is made of metal material, such as aluminum or food-grade stainless steel, and is formed by stamping process, which not only improves the appearance and quality of the product, but also enhances the overall strength and wear resistance of the opening 11 through its metal structure.

[0049] Similarly, in the above embodiment, after the material 12 elastically retracts and comes into contact with the application area, the metal middle cap 500 also comes into contact with the application area. While applying the material 12, the middle cap 500 can also massage the application area, which can also improve the adhesion of the material 12 to the application area, making the application more even, the makeup effect more natural, and the skin feel more comfortable.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A retractable middle core, characterized in that, include: Middle bundle tube; A guide sleeve, part of which is disposed inside the middle bundle tube; A bead, comprising a support and a spiral post connected to the support, the spiral post extending into the guide sleeve; A spiral assembly is disposed within the guide sleeve and threadedly engages with the spiral column; The spiral assembly drives the bead to extend and retracts elastically under external force, so that the top of the bead remains flush with the opening of the middle tube.

2. The retractable middle core according to claim 1, characterized in that, The opening of the middle tube is rounded.

3. The retractable middle core according to claim 1, characterized in that, The opening of the middle tube is provided with a mating part.

4. The retractable middle core according to claim 3, characterized in that, The mating part includes an annular base and a flange connected to the annular base.

5. The retractable middle core according to claim 4, characterized in that, At least one end face of the flange is provided with a plurality of locking blocks.

6. The retractable middle core according to claim 4 or 5, characterized in that, It also includes a center cap that is adapted to the mating part.

7. The retractable middle core according to claim 6, characterized in that, The mid-mount cover is made of metal.

8. The retractable middle core according to claim 1, characterized in that, The spiral assembly includes a base, a spiral tube, and an elastic element; The base engages with the guide sleeve, the spiral tube is supported on the base, and the elastic element is disposed between the base and the spiral tube.

9. The retractable middle core according to claim 8, characterized in that, The base includes a pedestal and a locking portion and an extension portion extending from the pedestal; The engaging part is provided with a first engaging element, and the end of the guide sleeve is provided with a second engaging element that cooperates with the first engaging element.

10. The retractable middle core according to claim 9, characterized in that, The inner wall of the extension has a polygonal structure.

11. The retractable middle core according to claim 10, characterized in that, A support groove is provided at the opening of the extension.

12. The retractable middle core according to claim 9, characterized in that, The outer wall shape of the spiral tube is adapted to the inner wall shape of the extension.

13. The retractable middle core according to claim 11, characterized in that, The outer surface of the spiral tube is provided with a support block that cooperates with the support groove.

14. The retractable middle core according to claim 8, characterized in that, One end of the spiral tube is provided with a limiting part, and the inner sidewall of the limiting part is provided with an internal thread.

15. The retractable middle core according to claim 14, characterized in that, The outer circumference of the spiral column is provided with an external thread that mates with the internal thread.

16. The retractable middle core according to claim 1, characterized in that, The bottom of the support has at least one through hole, and the material is disposed inside it.

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