A cosmetic apparatus

Abstract

The present invention relates to the technical field of cosmetic containers, and more particularly to a cosmetic apparatus convenient for disassembly. The cosmetic apparatus comprises: an apparatus body, a counterweight block, and a base, wherein the base is detachably mounted to a lower portion of the apparatus body; a recessed cavity is provided within the base, and the counterweight block is detachably mounted within the recessed cavity. A first end of the recessed cavity is provided with a mounting seat, at least a portion of the counterweight block is positioned within the mounting seat, a side wall of the mounting seat is configured to surround the counterweight block, and a first end of the counterweight block is in contact with a bottom of the mounting seat. A second end of the recessed cavity is provided with a protrusion, and a second end of the counterweight block is in line contact with the protrusion. The invention provides a dual-direction limiting solution that combines surface contact and in line contact, while requiring a lower degree of fit precision between the mounting seat and the counterweight block. This configuration enables the cosmetic apparatus to achieve both ease of disassembly and structural stability, while also maintaining user convenience.

Description

DESCRIPTIONTITLE OF INVENTION: [A COSMETIC APPARATUS]REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the priority to Chinese patent application No. 202421980036.6, titled “A COSMETIC APPARATUS CONVENIENTLY FOR DISASSEMBLY”, filed on 15 August 2024, the contents of which are incorporated herein by reference.TECHNICAL FIELD

[0002] The present disclosure generally relates to the field of cosmetic apparatuses or containers, and more particularly to a cosmetic apparatus that is convenient for disassembly, for purposes such as facilitating recycling.BACKGROUND

[0003] The following discussion of the background to the invention is intended to facilitate an understanding of the present invention only. It should be appreciated that the discussion is not an acknowledgement or admission that any of the material referred to was published, known or part of the common general knowledge of the person skilled in the art in any jurisdiction as at the priority date of the invention.

[0004] In the field of cosmetic apparatuses / containers, particularly for small handheld products such as lipstick housings, a counterweight block is commonly used to increase the overall weight of the cosmetic apparatus, thereby enhancing stability during use and preventing tilting or rolling. By integrating the counterweight block into the bottom of the cosmetic container, this design could improve both the user’s grip and the stability of the product during use.

[0005] However, conventional counterweight blocks often involve directly fixing and sealing the counterweight block within the interior of the cosmetic container’s bottom. Although this arrangement is simple and effective, it presents drawbacks in terms of product recycling and reuse. Specifically, because the counterweight block is permanently fixed inside the cosmetic container, it is difficult to disassemble it separately. As a result, the entire cosmetic container must be treated as a single unit during therecycling process. This not only increases the complexity of recycling, but also results in large amounts of recyclable materials (such as metals and plastics) being discarded due to the inability to effectively separate and classify them, leading to unnecessary resource waste and even environmental pollution. Therefore, how to improve the design of cosmetic containers to ensure both stability during use and ease of recycling and reuse has become a technical problem to be addressed.

[0006] In this regard, Chinese Utility Model Patent Publication No. CN220403382U, titled “RECYCLABLE LIPSTICK TUBE WITH COUNTERWEIGHT DEVICE”, discloses a recyclable lipstick housing with a counterweight device, comprising an upper cap, a base, a sleeve, a middle sleeve, a bead holder, a counterweight block, and a bottom cap. The upper cap covers the opening of the base; the sleeve is fitted within the base and also sleeved onto the middle sleeve. A spiral groove is formed on the inner surface of the sleeve, while a guide groove is provided on the outer surface of the middle sleeve. The cooperation between the spiral groove and the guide groove enables the bead holder to move vertically within the middle sleeve. An inner cavity is formed at the bottom of the base to accommodate the counterweight block, and a detachable bottom cap is arranged at the opening of the inner cavity. This configuration allows the counterweight block to be removed through the bottom cap, thereby facilitating separation and recycling. However, achieving both structural stability and ease of disassembly remains challenging. For example, the counterweight block is firmly secured by the bottom cap, and separating the two may require considerable manual effort.

[0007] Thus, there exists a need to develop a cosmetic apparatus a cosmetic apparatus that facilitates disassembly of the counterweight block for recycling purposes, while also maintaining structural stability and ease of use, addressing at least one of the problems associated with conventional cosmetic apparatuses.SUMMARY

[0008] Specifically, to address the above-mentioned technical problems, the present invention specifically uses the following technical solutions:

[0009] Accordingly, an aspect of the invention refers to a cosmetic apparatus, comprising: an apparatus body (1 ), a counterweight block (2), and a base (3), wherein the base (3) is detachably mounted to a lower portion of the apparatus body (1 ); arecessed cavity (31 ) is provided in the base (3), the counterweight block (2) is detachably mounted in the recessed cavity (31); a first end of the recessed cavity (31 ) is provided with a mounting seat, at least a portion of the counterweight block (2) is located within the mounting seat; a side wall of the mounting seat is configured to surround the counterweight block (2) so as to provide radial constraint for the counterweight block (2), and a first end of the counterweight block (2) is configured to be in contact with a bottom of the mounting seat; a second end of the recessed cavity (31 ) is provided with a protrusion, the protrusion is configured to adopt an annular or sheet-like structure; a second end of the counterweight block (2) is configured to be in line contact with the protrusion, and the protrusion is configured to cooperate with the mounting seat to provide axial constraint for the counterweight block (2).

[0010] In some embodiments, a third mounting seat (1 1 ) is provided at a bottom of the apparatus body (1 ), the third mounting seat (1 1 ) is located at the first end of the recessed cavity (31 ), a third protrusion (36) is provided on a bottom inner surface of the base (3), and the third protrusion (36) is configured to cooperate with the third mounting seat (1 1 ) to constrain the counterweight block (2).

[0011] In some embodiments, an opening of the recessed cavity (31 ) is detachably provided with a sealing cover (4); the sealing cover (4) is configured to constrain the counterweight block (2) within the recessed cavity (31 ).

[0012] In some embodiments, a first mounting seat (32) is provided at a top of the recessed cavity (31 ), and a first protrusion (411 ) is provided on an upper surface of the sealing cover (4); the first mounting seat (32) and the first protrusion (41 1) cooperating to constrain the counterweight block (2) within the recessed cavity (31 ).

[0013] In some embodiments, a second mounting seat (421) is provided on an upper surface of the sealing cover (4), and a second protrusion (35) is provided at a top of the recessed cavity (31), the second mounting seat (421 ) and the second protrusion (35) cooperating to constrain the counterweight block (2) within the recessed cavity (31 ).

[0014] In some embodiments, one side on a plane of the sealing cover (4) is provided with a protruding latching member (412), and the other side is provided with an elastic fastening member (413); both sides of the elastic fastening member (413) are provided with protruding first latching points (414); an edge on one side of the opening of therecessed cavity (31 ) is provided with a latching edge (33) extending into a range of the opening, and the other side is provided with a second latching point (34); the latching member (412) is configured to be placed onto an upper portion of the latching edge (33), and the first latching points (414) of the elastic fastening member (413) cooperate with the second latching point (34) to fix the sealing cover (4) at the opening of the recessed cavity (31 ).

[0015] In some embodiments, external threads (422) are circumferentially provided on an outer wall of the second mounting seat (421 ), internal threads (422) are provided inside the recessed cavity (31 ), and the second mounting seat (421 ) is connected to the recessed cavity (31 ) via the threads (422).

[0016] In some embodiments, a rotating handle (423) is radially provided on a lower surface of the sealing cover (4), and a receiving cavity (426) with a downward opening is formed by a recessed bottom of the sealing cover (4) extending into the recessed cavity (31 ), the rotating handle (423) being located within the receiving cavity (426).

[0017] In some embodiments, a cross-sectional shape of the receiving cavity (426) is arc-shaped or trapezoidal.

[0018] In some embodiments, at least one positioning catch tooth (392) is provided inside the base (3), and a positioning slot (424) is provided on the sealing cover (4).

[0019] In some embodiments, a limiting portion (425) is provided at a bottom of the sealing cover (4), and a limiting step (391 ) is provided inside the recessed cavity (31 ); when the sealing cover (4) is screwed into the recessed cavity (31) to a maximum extent, the limiting portion (425) abuts against the limiting step (391).

[0020] In some embodiments, the apparatus body (1 ) is a lipstick housing.

[0021] Another aspect of the invention refers to a cosmetic apparatus convenient for disassembly, comprising an apparatus body, a counterweight block, and a base, wherein the base is detachably mounted to a lower portion of the apparatus body; the counterweight block is mounted either between the apparatus body and the base, or within a recessed cavity provided at a bottom of the base; a detachable sealing cover is arranged at an opening of the recessed cavity, the sealing cover being configured to constrain the counterweight block within the recessed cavity.

[0022] In some embodiments, a first mounting seat is provided at a top of the recessed cavity, and the counterweight block is fitted and placed within the first mounting seat.

[0023] In some embodiments, a first protrusion is provided on an upper surface of the sealing cover, the first protrusion being configured to cooperate with the first mounting seat to constrain the counterweight block within the recessed cavity.

[0024] In some embodiments, one side on a plane of the sealing cover is provided with a protruding latching member, and the other side is provided with an elastic fastening member; both sides of the elastic fastening member are provided with protruding first latching points; one edge of the opening of the recessed cavity is provided with a latching edge extending into the range of the opening, and the other side is provided with a second latching point; the latching member is configured to be placed on an upper portion of the latching edge, and the first latching points of the elastic fastening member cooperate with the second latching point to fix the sealing cover at the opening of the recessed cavity.

[0025] In some embodiments, the sealing cover and the recessed cavity are connected by threaded engagement; the sealing cover is provided with a second mounting seat configured to receive the counterweight block, and a second protrusion is provided at a top of the recessed cavity; the second protrusion cooperates with the sealing cover to constrain the counterweight block.

[0026] In some embodiments, an external thread is provided around a periphery of the second mounting seat for engagement with the recessed cavity, and the second protrusion is a protruding ring structure.

[0027] In some embodiments, a radial rotating handle is provided on a bottom surface of the sealing cover.

[0028] In some embodiments, a third mounting seat is provided at a bottom of the apparatus body, the counterweight block is placed within the third mounting seat, and a third protrusion is provided on a bottom inner surface of the base; the third protrusion cooperates with the third mounting seat to constrain the counterweight block.

[0029] In some embodiments, a frangible point is provided between a lower surface of the base and its edge.

[0030] In some embodiments, a strip-shaped hole is formed at a position on the lower surface of the base near its edge.

[0031] Other aspects and features of the present invention will become apparent to those of ordinary skill in the art upon review of the following description of specific embodiments of the invention in conjunction with the accompanying figures.BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In the figures, which illustrate, by way of non-limiting examples only, embodiments of the present invention,

[0033] [FIG. 1] illustrates a schematic exploded view of the overall structure of Embodiment 1 ;

[0034] [FIG. 2] illustrates a front structural view of the base and the sealing cover in Embodiment 1 ;

[0035] [FIG. 3] illustrates a schematic exploded view of the overall structure of Embodiment 2;

[0036] [FIG. 4] illustrates a structural view of the sealing cover in Embodiment 2;

[0037] [FIG. 5] illustrates a front structural view of the base and the sealing cover inEmbodiment 2;

[0038] [FIG. 6] illustrates a schematic exploded view of the overall structure of Embodiment 3;

[0039] [FIG. 7] illustrates a structural view of the interior of the base in Embodiment 3;

[0040] [FIG. 8] illustrates a schematic exploded view of the overall structure of Embodiment 4;

[0041] [FIG. 9] illustrates a front structural view of the base and the sealing cover in Embodiment 4;

[0042] [FIG. 10] illustrates a cross-sectional view showing one example of the receiving cavity in Embodiment 6;

[0043] [FIG. 1 1] illustrates a cross-sectional view showing another example of the receiving cavity in Embodiment 6;

[0044] [FIG. 12] illustrates a sectional view showing the cooperation between the sealing cover and the limiting protrusion in Embodiment 6 to constrain the counterweight block;

[0045] [FIG. 13] illustrates a perspective view of a sealing cover according to another embodiment of the present invention;

[0046] [FIG. 14] illustrates a cross-sectional view of an exemplary cosmetic apparatus according to an embodiment of the present invention.DETAILED DESCRIPTION

[0047] Throughout this document, unless otherwise indicated to the contrary, the terms “comprising”, “consisting of', “having” and the like, are to be construed as non-exhaustive, or in other words, as meaning “including, but not limited to”.

[0048] Furthermore, throughout the document, unless the context requires otherwise, the word “include” or variations such as “includes” or “including” will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.

[0049] In this document, suffixes such as “component’, “module", “part”, or “unit” used to denote elements are intended solely to facilitate the description of the present invention and do not carry any specific meaning by themselves. Therefore, the terms “component”, “module”, “part", and “unit” may be used interchangeably.

[0050] In this document, terms such as “upper”, “lower”, “inner”, “outer”, “front”, “rear”, “one end”, and “the other end” indicate directions or positional relationships based on those shown in the accompanying drawings. They are used merely to simplify the description of the invention and are not intended to indicate or imply that the referenced components or structures must have a particular orientation or be constructed and operated in a particular orientation. Thus, they should not be construed as limiting the invention.

[0051] In addition, terms such as “first”, “second” and “third” are used solely for descriptive purposes and should not be interpreted as indicating or implying relative importance.

[0052] Unless otherwise clearly specified or limited, terms such as “mounted”, “provided with”, and “connected" should be interpreted broadly. For example, “connected” may refer to a fixed connection, a detachable connection, or an integral connection; it may also refer to mechanical coupling, direct connection, indirect connection via an intermediate medium, or internal communication between components. For those of ordinary skill in the art, the specific meanings of these terms in the context of the present invention can be understood according to specific circumstances. The term “plurality” means two or more, including two, three, four, five, and so on.

[0053] In the context of the present invention, the term “axially” refers to the direction along the central longitudinal axis of the cosmetic apparatus. Specifically, it denotes the vertical direction, corresponding to the path along which the counterweight block is inserted into or removed from the recessed cavity. “Axial constraint”, therefore, refers to limiting movement of the counterweight block in the upward or downward direction within the cavity. For example, in the case of a lipstick housing (or lipstick tube) positioned upright, the axial direction extends along the length of the tube, from top to bottom.

[0054] In the context of the present invention, the term “radially” refers to a direction perpendicular to the central axis, namely, extending outward from or inward toward the center of the cylindrical body. Accordingly, “radial constraint” refers to restricting lateral movement of the counterweight block, thereby preventing it from shifting side to side or wobbling within the recessed cavity. For example, in a lipstick housing (or lipstick tube) positioned upright, the radial direction corresponds to the side-to-side direction, perpendicular to the length of the tube and directed toward or away from its central axis.

[0055] In the context of the present invention, the term “in-line contact” refers to refers to the contact between two components that occurs along a narrow, elongated region (i.e., a line) rather than across a surface area. In the present invention, in line contact is formed between the second end of the counterweight block (2) and the protrusion (e.g., the first protrusion (411)), where the shape or geometry of the protrusion (such as a ring, arc, or sheet) causes it to contact the counterweight block along a defined line, providing axial constraint with limited friction.

[0056] Unless defined otherwise, all other technical and scientific terms used herein have the same meaning as is commonly understood by a skilled person to which the subject matter herein belongs.

[0057] EMBODIMENT 1

[0058] Referring to the structural schematic diagrams shown in FIG. 1 and FIG. 2.

[0059] This embodiment discloses a cosmetic apparatus convenient for disassembly, comprising an apparatus body (1 ), a counterweight block (2), and a base (3).

[0060] In this embodiment, the apparatus body (1 ) is in the form of a lipstick housing (also known as lipstick tube); of course, it may also be another type of cosmetic container. The base (3) is detachably mounted to a lower portion of the apparatus body (1). The detachable mounting may be implemented using common means such as threaded connection or snap-fit connection.

[0061] Referring to Figure 14, when the apparatus body (1 ) is configured as a lipstick housing, the apparatus body (1 ) specifically comprises, from top to bottom, a middle sleeve (102) and a rotating seat (101 ) arranged in sequence, as well as a sleeve (103) and an upper cap (104) sequentially sleeved around the outside of the middle sleeve (102) and the rotating seat (101 ). The sleeve (103) is configured to enclose and constrain the middle sleeve (102) and the rotating seat (101) as a unitary assembly. This unitary assembly is connected to the base (3) via either the sleeve (103) or the rotating seat (101 ), while the upper cap (104) is detachably connected to the base (3).

[0062] To facilitate disassembly of the counterweight block (2) located between the apparatus body (1 ) and the base (3), a recessed cavity (31) is provided at the bottom of the base (3) in this embodiment, and the counterweight block (2) is disposed within the recessed cavity (31 ). A sealing cover (4) is detachably arranged at the opening of the recessed cavity (31). The sealing cover (4) is configured to constrain the counterweight block (2) within the recessed cavity (31), meaning that the counterweight block (2) is held in a relatively fixed position inside the recessed cavity (31 ).

[0063] Here, the “opening of the recessed cavity (31)” refers to the opening formed at the bottom of the base (3) on the side of the recessed cavity (31) that is opposite from the apparatus body (1 ). When the sealing cover (4) is connected to the base (3), a sealedcavity is formed between the sealing cover (4), the base (3), and the apparatus body (1 ).In this state, the recessed cavity (31 ) is closed off.

[0064] In this embodiment, a first mounting seat (32) is provided at the top of the recessed cavity (31), and the counterweight block (2) is fitted and placed within the first mounting seat (32).

[0065] A first protrusion (411 ) is formed on the upper surface of the sealing cover (4). The first protrusion (41 1 ) is configured to engage with the first mounting seat (32) to constrain the counterweight block (2) within the recessed cavity (31 ), thereby preventing any looseness or movement of the counterweight block (2) inside the recessed cavity (31 ). In other words, the first mounting seat (32) and the first protrusion (41 1 ) together form a limiting space, within which the counterweight block (2) is constrained.

[0066] Referring to FIG. 2, one side of the sealing cover (4) (on the flat surface) is provided with a protruding latching member (412), and the other side of the sealing cover (4) is provided with an elastic fastening member (413). Both sides of the elastic fastening member (413) are provided with protruding first latching points (414). An edge on one side of the opening of the recessed cavity (31 ) is provided with a latching edge (33) extending into the range of the opening, and the other side of the opening of the recessed cavity (31 ) is provided with a second latching point (34).

[0067] During assembly, the latching member (412) is placed onto the upper portion of the latching edge (33). The first latching points (414) of the elastic fastening member (413) cooperate with the second latching point (34) to fix the sealing cover (4) at the opening of the recessed cavity (31 ). During disassembly of the counterweight block (2), the elastic fastening member (413) can be pressed to disengage the first latching points (414) from the second latching point (34), thereby allowing the sealing cover (4) to be removed and the counterweight block (2) to be easily taken out.

[0068] EMBODIMENT 2

[0069] As shown in FIGs 3, 4, and 5, in this embodiment, a recessed cavity (31 ) is provided at the bottom of the base (3), and the counterweight block (2) is disposed within the recessed cavity (31 ). A sealing cover (4) is detachably arranged at the opening of the recessed cavity (31). The sealing cover (4) is configured to constrain the counterweight block (2) within the recessed cavity (31), i.e., to hold the counterweight block (2) in arelatively fixed position inside the recessed cavity (31 ).

[0070] The sealing cover (4) comprises a second mounting seat (421 ) configured to receive the counterweight block (2). A second protrusion (35) is provided at the top of the recessed cavity (31 ), the second protrusion (35) being an annular structure. An external thread (422) is provided on the outer wall of the sealing cover (4) (i.e., on the outer circumference of the second mounting seat (421 )), and a corresponding internal thread is formed inside the recessed cavity (31 ). The sealing cover (4) and the recessed cavity (31 ) are detachably connected via threaded engagement. As shown in FIG. 5, the second protrusion (35) is configured to comprise a protruding ring structure. The second protrusion (35) is configured to cooperate with the sealing cover (4) to constrain the counterweight block (2).

[0071] To facilitate removal of the sealing cover (4), a rotating handle (423) is provided on its bottom surface (or lower surface). By applying a rotational force to the rotating handle (423), the sealing cover (4) can be easily unscrewed, allowing convenient access to the counterweight block (2) contained within. Once the sealing cover (4) is removed, the counterweight block (2) can readily fallout from the recessed cavity (31).

[0072] EMBODIMENT 3

[0073] As shown in FIG. 6, in this embodiment, a third mounting seat (1 1 ) is provided at the bottom of the apparatus body (1 ). The third mounting seat (1 1 ) is defined by two arc-shaped walls, and the counterweight block (2) is mounted within the third mounting seat (1 1) of the apparatus body (1). The base (3) is detachably connected to the bottom of the apparatus body (1 ), facilitating disassembly of the counterweight block (2). The detachable connection may be achieved via threaded engagement or edge latching.

[0074] As shown in FIG. 7, a third protrusion (36) is provided on a bottom inner surface of the base (3). The third protrusion (36) is configured to cooperate with the third mounting seat (11 ) to constrain the counterweight block (2) between them, thereby preventing looseness or movement.

[0075] When the counterweight block (2) is mounted within the third mounting seat (11 ) and the base (3) is connected to the apparatus body (1), the counterweight block (2) is fixed in place by the combined effect of the third mounting seat (11 ) and the third protrusion (36). When the base (3) and the apparatus body (1) are disconnected, thecounterweight block (2) can be readily released from the third mounting seat (1 1 ) with ease.

[0076] EMBODIMENT 4

[0077] As shown in FIGs 8 and 9, based on Embodiment 3, a frangible point (371 ) is provided between a lower surface (37) of the base (3) and its edge (38). When an external force is applied to the lower surface (37) of the base (3), the lower surface (37) can break off at the frangible point (371 ), allowing removal of the counterweight block (2) contained inside.

[0078] In some embodiments, a strip-shaped hole (372) is formed near the edge of the lower surface (37) of the base (3). This strip-shape hole (372) is configured to receive an extraction tool, such as a screwdriver. By inserting the screwdriver into the stripshaped hole (372), the frangible point (371) can be conveniently broken, thereby separating the apparatus body (1 ) from the counterweight block (2) to enable convenient recycling.

[0079] By constraining the counterweight block (2) both axially and radially, and using a “partially enclosed” radial fixing approach, the structure allows the counterweight block (2) to be easily released from the base (3) (and from the third mounting seat (1 1 )) under its own weight, even without applying external force directly to the counterweight block (2) (i.e. , without any physical contact) once the lower surface (37) of the base (3) is broken off.

[0080] EMBODIMENT 5

[0081] This embodiment discloses a cosmetic apparatus convenient for disassembly, referring to Figures 1 through 10, comprising at least: an apparatus body (1 ), a counterweight block (2), and a base (3), wherein the base (3) is detachably mounted to a lower portion of the apparatus body (1 ).

[0082] A recessed cavity (31 ) is provided within the base (3), and the counterweight block (2) is detachably mounted within the recessed cavity (31 ). A first end of the recessed cavity (31 ) is provided with a mounting seat, and at least a portion of the counterweight block (2) is positioned within the mounting seat. A side wall of the mounting seat surrounds the counterweight block (2) to provide radial constraint, and a first end ofthe counterweight block (2) is in contact with the bottom of the mounting seat.

[0083] A second end of the recessed cavity (31 ) is provided with a protrusion. A second end of the counterweight block (2) is in contact with the protrusion. The protrusion cooperates with the mounting seat to constrain the counterweight block (2) axially.

[0084] In this embodiment, the mounting seat and the protrusion are respectively located at the bottom of the apparatus body (1 ) and the base (3). When the base (3) is detached from the apparatus body (1 ), the counterweight block (2) can be disassembled along with it. For example, referring to FIGs. 6 and 7, the mounting seat is provided at the bottom of the apparatus body (1 ), and the protrusion is provided at the bottom of the base (3). Of course, the positions of the mounting seat and the protrusion may be reversed, such that the mounting seat is provided at the bottom of the base (3) and the protrusion is provided at the bottom of the apparatus body (1 ).

[0085] The terms “first end” and “second end” are used here solely for descriptive convenience regarding the positions of the mounting seat and the protrusion. The first and second ends refer to opposite ends of the recessed cavity (31 ), and their positions may be interchanged. For example, the first end may refer to the top of the recessed cavity (31 ) (i.e., the end near the apparatus body (1 )), while the second end refers to the opening of the recessed cavity (31 ) (i.e., the end away from the apparatus body (1 )).

[0086] It should be noted that the term “mounting seat” includes the first mounting seat (32), the second mounting seat (421), and the third mounting seat (1 1 ) as described in Embodiments 1 - 4. Likewise, the term “protrusion” includes the first protrusion (411 ), the second protrusion (35), and the third protrusion (36) as described in Embodiments 1 - 4.

[0087] In some embodiments, the internal shape of the mounting seat corresponds to the shape of the counterweight block (2). For example, when the counterweight block (2) is cylindrical, the interior of the mounting seat is also circular. In specific embodiments, the counterweight block (2) may be fitted into the mounting seat with varying degrees of fit. When the fit is tighter, the mounting seat may partially retain the counterweight block (2) in position. When the fit is looser, a slight gap may exist between the counterweight block (2) and the mounting seat, allowing the counterweight block (2) to be more easily removed.

[0088] In some embodiments, the protrusion may be formed as a sheet-like structure.In other embodiments, the first protrusion (41 1 ) may take the form of a circular ring, an irregular annular shape, or a discontinuous ring (e g., two arc-shaped segments forming an open ring), among other possible configurations. When the first protrusion (411 ) of such a shape contacts the counterweight block (2), the contact occurs in the form of in line contact.

[0089] With the above structure, the cosmetic apparatus uses a combination of surface contact (via the mounting seat) and in line contact (via the protrusion) to constrain the counterweight block (2) both axially and radially. On the one hand, this structure allows the counterweight block (2) to be stably clamped within the limiting space defined by the mounting seat and the protrusion even when the fit between the mounting seat and the counterweight block (2) is loose. On the other hand, the friction between the counterweight block (2), the protrusion, and the mounting seat remains within a controllable range during installation and disassembly. In other words, the structure ensures stability while avoiding excessive assembly or disassembly difficulty.

[0090] Specifically, during installation, the counterweight block (2) is first placed within the mounting seat. The sealing cover (4) is then attached to the base (3) via a snap-fit or threaded structure (422). Once installation is complete, the protrusion — positioned opposite the mounting seat — engages the counterweight block (2) through in line contact. The mounting seat and the protrusion work in conjunction to securely clamp the counterweight block (2) in place. During this process, as the sealing cover (4) is threaded into position, the protrusion transitions from initial contact to full axial engagement with the counterweight block (2), while the in line contact ensures that the frictional resistance remains within a controlled range. When disassembling the apparatus, the counterweight block (2) separates from the protrusion with minimal resistance and can be easily removed from the mounting seat, which is not configured as an interference fit.

[0091] EMBODIMENT S

[0092] Different from Embodiment 5, the cosmetic apparatus in this embodiment further comprises a sealing cover (4), which is detachably mounted to the bottom of the base (3). By removing the sealing cover (4), the counterweight block (2) located inside the base (3) can be taken out without needing to detach the base (3) itself.

[0093] In some embodiments, the sealing cover (4) is a snap-fit sealing cover.Specifically, referring to FIG. 2, one side on the plane of the sealing cover (4) is provided with a protruding latching member (412), and the other side is provided with an elastic fastening member (413). Both sides of the elastic fastening member (413) are provided with protruding first latching points (414). An edge on one side of the opening of the recessed cavity (31) is provided with a latching edge (33) that extends into the opening area, and the other side is provided with a second latching point (34). During assembly, the latching member (412) is placed on an upper portion of the latching edge (33), and the first latching points (414) of the elastic fastening member (413) engage with the second latching point (34) to fix the sealing cover (4) at the opening of the recessed cavity (31 ). During disassembly of the counterweight block (2), the elastic fastening member (413) may be pressed so that the first latching points (414) disengage from the second latching point (34), thereby allowing the sealing cover (4) to be removed and the counterweight block (2) to be easily taken out.

[0094] In other embodiments, the sealing cover (4) is a threaded sealing cover. Specifically, referring to FIGs. 3 and 4, an external thread (422) is provided on the outer wall of the sealing cover (4). Correspondingly, an internal thread (422) is provided within the recessed cavity (31 ) to allow threaded engagement between the sealing cover (4) and the recessed cavity (31 ).

[0095] In some embodiments, at least one positioning catch tooth (392) is provided inside the recessed cavity (31 ), and the outer periphery of the sealing cover (4) is provided with at least one positioning slot (424) that cooperates with the positioning catch tooth (392). When the sealing cover (4) is screwed into the recessed cavity (31 ) and the positioning catch tooth (392) is aligned with and inserted into the positioning slot (424), the protrusion and the mounting seat cooperate to clamp the counterweight block (2).

[0096] In some embodiments, a limiting portion (425) is provided on the bottom of the sealing cover (4), and a limiting step (391 ) is provided within the recessed cavity (31 ). The positioning catch tooth (392) is arranged on the limiting step (391 ), and the positioning slot (424) is provided on the limiting portion (425). When the sealing cover (4) is fully screwed into the recessed cavity (31), the limiting portion (425) abuts against the limiting step (391 ), and the positioning catch tooth (392) is positioned within the positioning slot (424).

[0097] By providing a dual-limiting structure (i.e., cooperation between the positioningcatch tooth (392) and the positioning slot (424), and between the limiting portion (425) and the limiting step (391 )), this configuration effectively prevents the sealing cover (4) from becoming “jammed” during threading into the base (3). At the same time, it also prevents deformation of the counterweight block (2) during in line contact with the protrusion due to pressure applied by the sealing cover (4).

[0098] In some embodiments, to facilitate removal of the sealing cover (4), a rotating handle (423) (such as a radial rotating handle) is provided on the bottom surface (also known as "lower surface1') of the sealing cover (4). By applying rotational force to the rotating handle (423), the sealing cover (4) can be easily removed, allowing access to the counterweight block (2) inside.

[0099] In some embodiments, anti-slip grooves are provided on the rotating handle (423).

[0100] In some embodiments, the rotating handle (423) may be omitted. Instead, referring to FIG. 13, the bottom of the sealing cover (4) is recessed toward the second mounting seat to form a rotational groove (427). The rotational groove (427) provided on the bottom surface (also known as the lower surface) of the sealing cover (4) is configured to assist the user in applying torque for disassembly of the sealing cover (4) to release the counterweight block (2). Specifically, during use, a flat tool, such as a coin or coin-like object, may be partially inserted into the rotational groove (427). The user can then grip and rotate the flat tool, which in turn drives the sealing cover (4) to rotate, allowing the sealing cover (4) to be easily removed. By way of example, the rotational groove (427) comprises an elongated cross-sectional shape in the radial direction, and its length gradually decreases along the direction extending from the bottom toward the top of the sealing cover (4) (FIG. 14).

[0101] In some embodiments, the mounting seat is provided on the upper surface of the sealing cover (4), and the external thread (422) is circumferentially arranged along the outer surface of the mounting seat.

[0102] In this configuration, the upper surface of the sealing cover (4) is efficiently utilized. This design consideration is particularly important for compact, handheld cosmetic apparatuses such as lipstick tubes, where the length of the base (3) directly impacts the overall size and usability of the product. If the base (3) is too long, the totalproduct volume increases, and without a corresponding increase in the weight of the counterweight block (2), the apparatus may lack sufficient balance. Conversely, if the base (3) is too short, users may find it difficult to apply adequate force during use due to reduced grip area. With the present structure, the upper portion of the sealing cover (4) serves a dual purpose: it houses the counterweight block (2) and also functions as a structural connection element cooperating with the base (3). In combination with the protrusion structure provided at the top of the recessed cavity (31 ), this design allows the overall length of the base (3) to remain compact while maintaining balance and usability.

[0103] Referring to FIG. 10, the bottom of the sealing cover (4) is recessed inward toward the interior of the recessed cavity (31 ), forming a downward-opening receiving cavity (426). The rotating handle (423) is located within the receiving cavity (426). The cross-sectional shape of the receiving cavity (426) in the vertical direction (i.e., the height direction of the cosmetic apparatus) is either arc-shaped or trapezoidal. In other words, the width or cross-sectional area of the receiving cavity (426) is configured to gradually increase from the side close to the recessed cavity (31 ) toward the side away from the recessed cavity (31 ), thereby forming a downward-opening trumpet-like structure.

[0104] In some embodiments, the height of the receiving cavity (426) is less than the height of the mounting seat, such that when the counterweight block (2) contacts the top of the receiving cavity (426), at least a portion of the counterweight block (2) remains within the mounting seat to achieve radial constraint.

[0105] In some embodiments, the receiving cavity (426) comprises a contact portion (4261 ) and a connection portion (4262) that extends downward circumferentially along the contact portion (4261 ). When the counterweight block (2) is placed within the mounting seat, the counterweight block (2) makes contact with the contact portion (4261 ).

[0106] By providing the receiving cavity (426), sufficient space is created for the user to stably grip and operate the rotating handle (423) with theirfingers. In addition, the arcshaped or trapezoidal structure further reduces the contact area between the counterweight block (2) and the mounting seat, making it easier to remove the counterweight block (2) from the mounting seat.

[0107] In other embodiments, the sealing cover (4) is an integrated sealing cover. In other words, the sealing cover (4) and the base (3) are configured to be integrally formed.Specifically, an opening is formed at the bottom of the base (3), and multiple frangible points (371 ) are circumferentially provided at the edge of the opening. The sealing cover (4) is connected to the base (3) via the frangible points (371 ). When an external force is applied to the sealing cover (4), the frangible points (371 ) break, allowing the sealing cover (4) to detach from the base (3) and expose the opening, through which the counterweight block (2) can exit.

[0108] Alternatively, the frangible points (371 ) are arranged circumferentially along the sealing cover (4), and the edge of the opening is circumferentially provided with multiple frangible grooves that cooperate with the frangible points (371). In this case, the sealing cover (4) seals the opening.

[0109] In some embodiments, the sealing cover (4) is provided with a through hole for insertion of a breaking tool, such as a screwdriver, to facilitate the application of force to the sealing cover (4).

[0110] The technical effects of the present invention are summarized as follows:

[0111] With users increasingly seeking high-quality cosmetics, some cosmetic products adopt counterweight blocks made of metal materials with a more “premium feel”. Compared with counterweight blocks made of plastic or other materials, metal counterweight blocks are characterized by having a relatively large mass and a small volume. In this context, it becomes a challenge to prevent the counterweight block from wobbling within the base while maintaining the overall length of the base, since the concentrated mass distribution of the metal block makes it more prone to movement within the internal space of the base.

[0112] To address this issue, the prior art commonly employs an interference fit with full encapsulation to lock the counterweight block within a groove in the base. This approach effectively prevents the counterweight block from wobbling inside the base. However, during disassembly and recycling, considerable force is required to pull the counterweight block out of the groove, which can easily result in damage to a non-metal base or deformation of a metal base or the counterweight block, thereby hindering their reuse without further processing, such as melting and remolding.

[0113] In contrast to the interference-fit encapsulation method, the present invention provides a dual-direction limiting solution that combines “in line contact” and “surfacecontact”, and which requires a lower degree of fit between the mounting seat and the counterweight block. By fully constraining the position of the counterweight block and compensating for the base length, this solution allows the cosmetic apparatus to achieve both ease of disassembly and stability during use.

[0114] In other words, in the assembled state of the cosmetic apparatus of the present invention, the mounting seat and the protrusion cooperate to provide comprehensive constraint of the counterweight block, without relying heavily on the latching function of the mounting seat. In addition, the length of the protrusion provides height compensation for the counterweight block, meaning that even when the counterweight block is relatively small in volume, it can still be securely clamped without compromising the overall length of the base. On the other hand, during disassembly, the protrusion that is in line contact with the counterweight block first separates from the surface of the counterweight block, allowing the counterweight block to detach from the base, configured without an interference fit, under its own weight or with minimal external force.

[0115] Specifically, in the assembled state, the protrusion and the bottom of the mounting seat cooperate to provide axial constraint for the counterweight block, while a side wall of the mounting seat arranged circumferentially around the counterweight block provides radial constraint. In other words, the protrusion and the mounting seat cooperate to constrain the counterweight block in all directions. At the same time, the protrusion compensates for the height of the counterweight block, thereby avoiding the need to excessively reduce the length of the base in order to increase clamping stability through the groove.

[0116] Furthermore, regardless of whether the base and the sealing cover are connected by latching or threading (especially threading), in the case of a threaded connection, as the base is gradually rotated during installation, the contact between the protrusion and the counterweight block increases the interaction force between them. In this case, compared to a full surface contact, the in line contact approach keeps the friction between the two components within a controllable range, thereby reducing installation and disassembly difficulty while minimizing wear on the respective components.

[0117] It should be further appreciated by the person skilled in the art that variations and combinations of features described above, not being alternatives or substitutes, maybe combined to form yet further embodiments falling within the intended scope of the invention. As would be understood by a person skilled in the art, each embodiment, may be used in combination with other embodiment or several embodiments.

[0118] REFERENCE NUMERALS:1 : apparatus body101: rotating seat102: middle sleeve103: sleeve104: upper cap11 : third mounting seat2: counterweight block3: base31 : recessed cavity32: first mounting seat33: latching edge34: second latching point35: second protrusion36: third protrusion37: lower surface371 : frangible point372: strip-shaped hole38: edge931 : limiting step392: positioning catch tooth4: sealing cover411 : first protrusion412: latching member413: elastic fastening member414: first latching point421 : second mounting seat422: thread423: rotating handle424: positioning slot425: limiting portion426: receiving cavity4261 : contact portion4262: connection portion427: rotational groove

Claims

ClaimsClaim 1 . A cosmetic apparatus, comprising: an apparatus body (1 ), a counterweight block (2), and a base (3), wherein the base (3) is detachably mounted to a lower portion of the apparatus body (1 ); a recessed cavity (31) is provided in the base (3), the counterweight block (2) is detachably mounted in the recessed cavity (31 ); a first end of the recessed cavity (31) is provided with a mounting seat, at least a portion of the counterweight block (2) is located within the mounting seat; a side wall of the mounting seat is configured to surround the counterweight block (2) so as to provide radial constraint for the counterweight block (2), and a first end of the counterweight block (2) is configured to be in contact with a bottom of the mounting seat; a second end of the recessed cavity (31 ) is provided with a protrusion, the protrusion is configured to adopt an annular or sheet-like structure; a second end of the counterweight block (2) is configured to be in line contact with the protrusion, and the protrusion is configured to cooperate with the mounting seat to provide axial constraint for the counterweight block (2).Claim 2. The cosmetic apparatus according to claim 1 , wherein a third mounting seat (11 ) is provided at a bottom of the apparatus body (1 ), the third mounting seat (11 ) is located at the first end of the recessed cavity (31), a third protrusion (36) is provided on a bottom inner surface of the base (3), and the third protrusion (36) is configured to cooperate with the third mounting seat (1 1 ) to constrain the counterweight block (2).Claim 3. The cosmetic apparatus according to claim 1 , wherein an opening of the recessed cavity (31 ) is detachably provided with a sealing cover (4); the sealing cover (4) is configured to constrain the counterweight block (2) within the recessed cavity (31 ).Claim 4. The cosmetic apparatus according to claim 3, wherein a first mounting seat (32) is provided at a top of the recessed cavity (31 ), and a first protrusion (411 ) is provided on an upper surface of the sealing cover (4), the first mounting seat (32) and the first protrusion (41 1 ) cooperating to constrain the counterweight block (2) within the recessed cavity (31 ).Claim 5. The cosmetic apparatus according to claim 3, wherein a second mounting seat(421 ) is provided on an upper surface of the sealing cover (4), and a second protrusion (35) is provided at a top of the recessed cavity (31 ), the second mounting seat (421 ) and the second protrusion (35) cooperating to constrain the counterweight block (2) within the recessed cavity (31 ).Claim 6. The cosmetic apparatus according to claim 3, wherein one side on a plane of the sealing cover (4) is provided with a protruding latching member (412), and the other side is provided with an elastic fastening member (413); both sides of the elastic fastening member (413) are provided with protruding first latching points (414); an edge on one side of the opening of the recessed cavity (31 ) is provided with a latching edge (33) extending into a range of the opening, and the other side is provided with a second latching point (34); the latching member (412) is configured to be placed onto an upper portion of the latching edge (33), and the first latching points (414) of the elastic fastening member (413) cooperate with the second latching point (34) to fix the sealing cover (4) at the opening of the recessed cavity (31 ).Claim 7. The cosmetic apparatus according to claim 5, wherein external threads (422) are circumferentially provided on an outer wall of the second mounting seat (421 ), internal threads (422) are provided inside the recessed cavity (31), and the second mounting seat (421 ) is connected to the recessed cavity (31 ) via the threads (422).Claim 8. The cosmetic apparatus according to claim 7, wherein a rotating handle (423) is radially provided on a lower surface of the sealing cover (4), and a receiving cavity (426) with a downward opening is formed by a recessed bottom of the sealing cover (4) extending into the recessed cavity (31 ), the rotating handle (423) being located within the receiving cavity (426).Claim 9. The cosmetic apparatus according to claim 8, wherein a cross-sectional shape of the receiving cavity (426) is arc-shaped or trapezoidal.Claim 10. The cosmetic apparatus according to claim 3 or claim 7, wherein at least one positioning catch tooth (392) is provided inside the base (3), and a positioning slot (424) is provided on the sealing cover (4).Claim 1 1 . The cosmetic apparatus according to claim 10, wherein a limiting portion (425) is provided at a bottom of the sealing cover (4), and a limiting step (391 ) is provided inside the recessed cavity (31 ); when the sealing cover (4) is screwed into the recessed cavity(31 ) to a maximum extent, the limiting portion (425) abuts against the limiting step (391 ).Claim 12. The cosmetic apparatus according to anyone of the preceding claims, wherein the apparatus body (1) is a lipstick housing.Claim 13. The cosmetic apparatus according to Claim 7, wherein a rotational groove (427) is provided on a lower surface of the sealing cover (4).

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