Telescopic liquid absorption structure

Abstract

The utility model discloses a telescopic liquid suction structure, which comprises a cover body connected with a container main body and capable of linearly moving along the axial direction of the container main body; the dropper part is connected with the cover body and can extend into the container main body; a liquid storage cavity is formed in the dropper part, a liquid suction opening is formed in the bottom end of the dropper part, and an open end is arranged at the top end of the dropper part; the pumping component is connected to the open end of the dropper component and is provided with a cavity communicated with the liquid storage cavity; the pumping component is connected with the cover body, and the pumping component comprises a pressing part extending out of the cover body and a telescopic pumping part arranged in the cover body; when the cover body does linear motion in the axial direction of the container main body, the pumping part does telescopic motion in the axial direction of the container main body so that liquid stored in the container main body can be sucked into the liquid storage cavity of the dropper part, and the pressing part can discharge the liquid in the liquid storage cavity of the dropper part.

Description

Technical Field

[0001] The utility model relates to the technical field of droppers, in particular to a telescopic liquid-absorbing structure. Background Art

[0002] For liquid cosmetics that are applied on the skin, it is difficult to accurately control the specific location when applying the makeup due to the fluidity of the liquid. In order to facilitate the use of liquid cosmetics that are applied on the skin, a dropper structure that can be connected to the cosmetic container is selected. When applying makeup, the cosmetics can be absorbed through the dropper structure and then accurately dripped toward the part that needs to be applied. This is time-saving and accurate. At present, most dropper structures used for cosmetics use a manual method of directly pressing the rubber head to take in and out the liquid.

[0003] In order to make it more convenient to take liquid, a rotary dropper structure has become more and more popular. However, at present, most of the rotary dropper structures used by operators have a relatively complex internal structure and cannot suck out the cosmetics when there is less cosmetics in the container, thereby causing waste of cosmetics. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the utility model is to provide a retractable liquid suction structure, which is provided with a pumping part connected to a dropper component and which will be retracted when a cover body makes a linear motion along the axial direction of a container body. When the cover body is operated, the liquid stored in the container body can be sucked into the liquid storage cavity of the dropper component. The structure is simple and the operation is convenient. Moreover, by reasonably setting the distance between the liquid suction port of the dropper component and the bottom end of the container body, the liquid in the container body can be almost completely sucked out without causing waste of cosmetics.

[0006] (II) Technical solution

[0007] The solution adopted by the utility model to solve the above technical problems is a retractable liquid absorption structure.

[0008] A cover body, which is connected to the container body and can move linearly along the axial direction of the container body;

[0009] A dropper component is connected to the cover body and can extend into the container body; a liquid storage cavity is arranged in the dropper component, a liquid suction port is arranged at the bottom end of the dropper component, and an open end is arranged at the top end;

[0010] a pumping component connected to the open end of the dropper component and having a cavity communicating with the liquid storage cavity;

[0011] Wherein, the pumping component is connected to the cover body, and the pumping component includes a pressing portion extending out of the cover body, and a retractable pumping portion disposed in the cover body; when the cover body makes a linear motion along the axial direction of the container body, the pumping portion makes a retractable motion along the axial direction of the container body to suck the liquid stored in the container body into the liquid storage cavity of the dropper component, and the pressing portion can discharge the liquid in the liquid storage cavity of the dropper component.

[0012] In some embodiments, the liquid suction port of the dropper component is arranged close to the bottom end of the container body.

[0013] In some embodiments, the cover body and the container body are connected by threads, and when the cover body is rotated, the cover body can achieve linear motion along the axial direction of the container body.

[0014] By adopting the above scheme, a pumping part connected to the dropper part is provided and expands and contracts when the cover body moves linearly along the axial direction of the container body. When the cover body is operated, the liquid stored in the container body can be sucked into the liquid storage cavity of the dropper part. The structure is simple and the operation is convenient. That is, after the cover body is operated to move downward along the container body, the pumping part is compressed; after the cover body is operated to move upward along the container body, the pumping part is relaxed and gradually expands. Since the cavity of the pumping part and the liquid storage cavity of the dropper part are communicated, the negative pressure generated by the compression of the pumping part will suck the liquid in the container body into the liquid storage cavity of the dropper part through the liquid suction port, so as to achieve the purpose of automatic liquid suction. Moreover, by reasonably setting the distance between the liquid suction port of the dropper part and the bottom end of the container body, the liquid in the container body can be almost completely sucked out without causing waste of cosmetics.

[0015] In some embodiments, the cover body includes an external cover that cooperates with the container body, and an internal cover connected to the external cover, and the internal cover is relatively arranged inside the external cover; and the internal cover encloses a mounting hole for installing the pumping component; the inner wall of the mounting hole is provided with a fixing portion for fixing the pumping portion; the pumping portion is connected to the fixing portion at one end along its axial direction, and a supporting portion that can abut against the top of the container body is formed at the other end; when the cover body makes a linear motion along the axial direction of the container body, the pumping portion can make a telescopic motion between the fixing portion and the container body.

[0016] In some embodiments, the inner wall of the outer cover is provided with an internal thread structure, and the container body includes an external thread structure that cooperates with the outer cover; the inner cover and the outer cover are arranged at intervals, and the gap formed between the inner wall of the inner cover and the inner wall of the outer cover is sufficient for the part of the container body that cooperates with the outer cover to pass through, so as to realize the threaded cooperation between the outer cover and the container body.

[0017] By adopting the above scheme, after the cover body is rotated to move downward, the cover body moves downward along the container body, and the fixed part gradually approaches the container body, so that the pumping part is compressed between the fixed part and the container body to generate negative pressure; after the cover body is rotated to move upward, the cover body moves upward along the container body, and the container body is relatively away from the fixed part, then the pumping part will gradually expand, and under the action of the negative pressure, the liquid in the container body will be sucked into the dropper component.

[0018] In some embodiments, the inner wall of the mounting hole protrudes inward near the top end of the inner cover to form the fixing portion, and the outer wall of the pumping portion near the pressing portion is formed with a snap-fitting groove for snap-fitting the fixing portion.

[0019] By adopting the above solution, the pumping part and the inner cover can be tightly connected through the cooperation between the fixing and the engaging groove.

[0020] In some embodiments, the fixing portion includes an annular protrusion formed by the inner wall of the mounting hole along a longitudinal protrusion, and an anti-slip portion is formed on at least one end of the annular protrusion along the axial direction on a side away from the mounting hole.

[0021] By adopting the above solution, the provision of the anti-slip portion can improve the gripping force of the fixing portion in the engaging groove to prevent the fixing portion and the pumping portion from being detached, thereby improving stability during use.

[0022] In some embodiments, the outer wall of the pumping part near the dropper component is formed with the abutment portion along a longitudinal protrusion, and the outer wall of the abutment portion and the inner wall of the external cover are spaced apart; so that the abutment portion and the external cover can be relatively positioned along the axial direction, thereby realizing that the pumping part can undergo telescopic movement during the axial linear movement of the external cover.

[0023] In some embodiments, the pumping portion includes a first connection portion connected to the dropper component, and the dropper component includes a second connection portion that cooperates with the first connection portion.

[0024] By adopting the above scheme, the fixed connection between the pumping part and the dropper component can be achieved through the cooperation of the first connecting part and the second connecting part, so as to realize the communication between the cavity in the pumping part and the liquid storage cavity of the dropper component, and then the liquid in the container body can be sucked into the liquid storage cavity of the dropper component during the telescopic movement of the pumping part.

[0025] In some embodiments, one of the first connection part and the second connection part is provided with an annular groove; the other of the first connection part and the second connection part is provided with an annular protrusion, and the annular protrusion is matched with the annular groove.

[0026] In some embodiments, the bottom end of the pumping part extends axially downward to form the first connecting part, which is in an annular structure and has an inner wall provided with the annular groove; the top end of the dropper component is located at the periphery of its open end and is provided with the annular protrusion extending longitudinally, and through the cooperation of the annular protrusion and the annular groove, a tight connection between the dropper component and the pumping part can be achieved, and the sealing between the dropper component and the pumping part can be ensured.

[0027] In some embodiments, the pumping portion includes a plurality of annular expansion portions arranged along the axial direction and extending radially outward, the annular expansion portions include a first inclined surface, a second inclined surface arranged opposite to the first inclined surface, and a transition surface connected between the first inclined surface and the second inclined surface, an angle ∠α is formed between the extension lines of the first inclined surface and the second inclined surface, and ∠α=90°±1°.

[0028] In some embodiments, an angle ∠β is formed between the first inclined surface of any one of the annular telescopic portions and an extension line of the second inclined surface of another adjacent annular telescopic portion, and ∠β=90°±1°.

[0029] By adopting the above solution, a motion compensation space is provided between each of the annular telescopic parts to realize the telescopic movement of the pumping part.

[0030] In some embodiments, the pumping component is made of silicone material, so that the connection between the pumping component and the cover body is tight, and the connection between the pumping component and the dropper component is tight, and the sealing is good.

[0031] (III) Beneficial effects

[0032] Compared with the prior art, the utility model designs a retractable liquid suction structure, which is provided with a pumping part connected to the dropper part and which will be retracted when the cover body makes a linear motion along the axial direction of the container body, so that when the cover body is operated, the liquid stored in the container body can be sucked into the liquid storage cavity of the dropper part, and the structure is simple and the operation is convenient; that is, after the cover body is operated to move downward along the container body, the pumping part is compressed; after the cover body is operated to move upward along the container body, the pumping part is relaxed and gradually expanded, and since the cavity of the pumping part and the liquid storage cavity of the dropper part are communicated, the negative pressure generated by the compression of the pumping part will suck the liquid in the container body into the liquid storage cavity of the dropper part through the liquid suction port, so as to achieve the purpose of automatic liquid suction; and, by reasonably setting the distance between the liquid suction port of the dropper part and the bottom end of the container body, the liquid in the container body can be almost completely sucked out, and no waste of cosmetics will be caused. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 This is a schematic structural diagram of a retractable liquid absorbing structure of the utility model;

[0035] Figure 2 This is an exploded view of a retractable liquid-absorbing structure of the utility model;

[0036] Figure 3 It is a cross-sectional view of a retractable liquid-absorbing structure of the utility model;

[0037] Figure 4 for Figure 3 The enlarged schematic diagram at A in the middle;

[0038] Figure 5 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0039] Figure 6 It is a cross-sectional view of the pumping component of the utility model.

[0040] 10. The names of the components corresponding to the various reference numerals in the figure are: 100, cover body; 101, outer cover; 102, inner cover; 1021, mounting hole; 1022, fixing part; 1022a, annular protrusion; 1022b, anti-slip part; 200, dropper part; 201, liquid storage cavity; 202, liquid suction port; 203, open end; 204, second connecting part; 2041, annular protrusion; 300, pumping part; 301, pressing part; 302, pumping part; 3021, abutting part; 3022, engaging groove; 3023, first connecting part; 3023a, annular groove; 3024, annular telescopic part; 3024a, first inclined surface; 3024b, second inclined surface; 3024c, transition surface; 303, cavity. DETAILED DESCRIPTION

[0041] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0042] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0044] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0045] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0046] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0047] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0048] like Figure 1-Figure 6As shown, the utility model provides a retractable liquid suction structure, comprising a cover 100, which is connected to the container body and can perform linear motion along the axial direction of the container body; a dropper component 200, which is connected to the cover 100 and can extend into the container body; a liquid storage cavity 201 is arranged in the dropper component 200, and a liquid suction port 202 is arranged at the bottom end of the dropper component 200, and an open end 203 is arranged at the top end; a pumping component 300, which is connected to the open end 203 of the dropper component 200, and has a cavity 303 communicated with the liquid storage cavity 201; In the embodiment, the pumping component 300 is connected to the cover body 100, and the pumping component 300 includes a pressing portion 301 extending out of the cover body 100, and a retractable pumping portion 302 disposed in the cover body 100; when the cover body 100 performs linear motion along the axial direction of the container body, the pumping portion 302 performs retractable motion along the axial direction of the container body to suck the liquid stored in the container body into the liquid storage cavity 201 of the dropper component 200, and the pressing portion 301 can discharge the liquid in the liquid storage cavity 201 of the dropper component 200. In some embodiments, the liquid suction port 202 of the dropper component 200 is arranged close to the bottom end of the container body. In some embodiments, the cover body 100 and the container body are connected by a threaded manner, and when the cover body 100 is rotated, the linear motion of the cover body 100 along the axial direction of the container body can be realized. By adopting the above scheme, the pumping part 302 connected to the dropper part 200 is provided and expands and contracts when the cover body 100 moves linearly along the axial direction of the container body. When the cover body 100 is operated, the liquid stored in the container body can be sucked into the liquid storage cavity 201 of the dropper part 200. The structure is simple and the operation is convenient. That is, after the cover body 100 moves downward along the container body, the pumping part 302 is compressed; after the cover body 100 moves upward along the container body, the pumping part 302 is compressed. When the pumping part 302 is relaxed, it will gradually expand. Since the cavity 303 of the pumping part 302 is connected to the liquid storage cavity 201 of the dropper part 200, the negative pressure generated by the compression of the pumping part 302 will suck the liquid in the container body into the liquid storage cavity 201 of the dropper part 200 through the liquid suction port 202, so as to achieve the purpose of automatic liquid suction. Moreover, by reasonably setting the distance between the liquid suction port 202 of the dropper part 200 and the bottom end of the container body, the liquid in the container body can be almost completely sucked out without causing waste of cosmetics.

[0049] In some embodiments, the cover body 100 includes an external cover 101 that cooperates with the container body, and an internal cover 102 connected to the external cover 101, and the internal cover 102 is relatively arranged inside the external cover 101; and the internal cover 102 encloses a mounting hole 1021 for mounting the pumping component 300; the inner wall of the mounting hole 1021 is provided with a fixing portion 1022 for fixing the pumping portion 302; the pumping portion 302 is connected to the fixing portion 1022 at one end along its axial direction, and a supporting portion 3021 is formed at the other end that can abut against the top end of the container body; when the cover body 100 makes a linear motion along the axial direction of the container body, the pumping portion 302 can make a telescopic motion between the fixing portion 1022 and the container body. In some embodiments, the inner wall of the outer cover 101 is provided with an inner thread structure, and the container body includes an outer thread structure that cooperates with the outer cover 101; the inner cover 102 and the outer cover 101 are arranged at intervals, and the gap formed between the inner wall of the inner cover 102 and the inner wall of the outer cover 101 is sufficient for the part of the container body that cooperates with the outer cover 101 to pass through, so as to achieve the threaded cooperation between the outer cover 101 and the container body. With the above scheme, after the cover body 100 is rotated to move downward, the cover body 100 moves downward along the container body, and the fixing part 1022 gradually approaches the container body, so that the pumping part 302 is compressed between the fixing part 1022 and the container body to generate negative pressure; after the cover body 100 is rotated to move upward, the cover body 100 moves upward along the container body, and the container body is relatively far away from the fixing part 1022, and the pumping part 302 will gradually expand, and under the action of the negative pressure, the liquid in the container body will be sucked into the dropper part 200. In some embodiments, the inner wall of the mounting hole 1021 protrudes inward near the top of the inner cover 102 to form the fixing portion 1022, and the outer wall of the pumping portion 302 near the pressing portion 301 is formed with a snap-fitting groove 3022 for snapping the fixing portion 1022. With the above solution, the pumping portion 302 and the inner cover 102 can be fastened together through the cooperation of the fixing and the snap-fitting groove 3022. In some embodiments, the fixing portion 1022 includes an annular protrusion 1022a formed by the inner wall of the mounting hole 1021 protruding along the longitudinal direction, and the annular protrusion 1022a is protruded along at least one end of the axial direction away from the mounting hole 1021 to form an anti-slip portion 1022b. By adopting the above scheme, the provision of the anti-detachment portion 1022b can improve the gripping force of the fixing portion 1022 in the engaging groove 3022 to prevent the fixing portion 1022 and the pumping portion 302 from detaching, thereby improving stability during use.In some embodiments, the outer wall of the pumping portion 302 near the dropper part 200 is formed with the abutment portion 3021 along a longitudinal protrusion, and the outer wall of the abutment portion 3021 and the inner wall of the external cover 101 are spaced apart; so that the abutment portion 3021 and the external cover 101 can be relatively positioned along the axial direction, thereby realizing that the pumping portion 302 can undergo telescopic movement during the axial linear movement of the external cover 101.

[0050] In some embodiments, the pumping part 302 includes a first connection part 3023 connected to the dropper part 200, and the dropper part 200 includes a second connection part 204 that cooperates with the first connection part 3023. With the above solution, the pumping part 302 and the dropper part 200 can be fixedly connected through the cooperation of the first connection part 3023 and the second connection part 204, so as to achieve the communication between the cavity 303 in the pumping part 302 and the liquid storage cavity 201 of the dropper part 200, and then the liquid in the container body can be sucked into the liquid storage cavity 201 of the dropper part 200 when the pumping part 302 moves in a telescopic manner. In some embodiments, the bottom end of the pumping portion 302 extends axially downward to form the first connecting portion 3023, the first connecting portion 3023 is an annular structure, and the inner wall thereof is provided with the annular groove 3023a; the top end of the dropper component 200 is located at the periphery of its open end 203 and is provided with the annular protrusion 2041 extending longitudinally, and through the cooperation of the annular protrusion 2041 and the annular groove 3023a, a fastened connection between the dropper component 200 and the pumping portion 302 can be achieved, and the sealing between the dropper component 200 and the pumping portion 302 can also be ensured.

[0051] In some embodiments, the pumping part 302 includes a plurality of annular telescopic parts 3024 arranged along the axial direction and extending radially outward, the annular telescopic parts 3024 include a first inclined surface 3024a, a second inclined surface 3024b arranged opposite to the first inclined surface 3024a, and a transition surface 3024c connected between the first inclined surface 3024a and the second inclined surface 3024b, and an angle ∠α is formed between the extension lines of the first inclined surface 3024a and the second inclined surface 3024b, and ∠α=90°. In some embodiments, an angle ∠β=90° is formed between the first inclined surface 3024a of any annular telescopic part 3024 and the extension line of the second inclined surface 3024b of another adjacent annular telescopic part 3024, and ∠β. By adopting the above scheme, there is a motion compensation space between each of the annular telescopic parts 3024 to realize the telescopic motion of the pumping part 302.

[0052] In some embodiments, the pumping component 300 is made of silicone material, so that the connection between the pumping component 300 and the cover body 100 is tight, and the connection between the pumping component 300 and the dropper component 200 is tight, and the sealing is good.

[0053] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0054] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A retractable liquid-absorbing structure, characterized in that: A cover body (100) connected to the container body and capable of linear movement along the axial direction of the container body; A dropper component (200) is connected to the cover body (100) and can extend into the container body; a liquid storage cavity (201) is provided in the dropper component (200), a liquid suction port (202) is provided at the bottom end of the dropper component (200), and an open end (203) is provided at the top end; A pumping component (300) connected to the open end (203) of the dropper component (200) and having a cavity (303) communicating with the liquid storage cavity (201); The pumping component (300) is connected to the cover body (100), and the pumping component (300) includes a pressing portion (301) extending out of the cover body (100), and a retractable pumping portion (302) disposed in the cover body (100); when the cover body (100) performs a linear motion along the axial direction of the container body, the pumping portion (302) performs a retractable motion along the axial direction of the container body to suck the liquid stored in the container body into the liquid storage chamber (201) of the dropper component (200), and the pressing portion (301) can discharge the liquid in the liquid storage chamber (201) of the dropper component (200).

2. The retractable liquid-absorbing structure according to claim 1, characterized in that: The cover body (100) comprises an outer cover (101) matched with a container body, and an inner cover (102) connected with the outer cover (101), wherein the inner cover (102) is arranged relatively inside the outer cover (101); and the inner cover (102) is enclosed to form a mounting hole (1021) for mounting the pumping component (300); the inner wall of the mounting hole (1021) is provided with a fixing portion (1022) for fixing the pumping portion (302); one end of the pumping portion (302) along its axial direction is connected to the fixing portion (1022), and the other end is formed with a supporting portion (3021) capable of abutting against the top end of the container body; when the cover body (100) makes a linear motion along the axial direction of the container body, the pumping portion (302) can make a telescopic motion between the fixing portion (1022) and the container body.

3. The retractable liquid-absorbing structure according to claim 2, characterized in that: The inner wall of the mounting hole (1021) protrudes inward near the top end of the inner cover (102) to form the fixing portion (1022), and the outer wall of the pumping portion (302) near the pressing portion (301) is formed with a snap-fitting groove (3022) for snap-fitting the fixing portion (1022).

4. The retractable liquid-absorbing structure according to claim 3, characterized in that: The fixing portion (1022) comprises an annular protrusion (1022a) formed by the inner wall of the mounting hole (1021) protruding along the longitudinal direction, and an anti-slip portion (1022b) is formed on at least one end of the annular protrusion (1022a) protruding along the axial direction on a side away from the mounting hole (1021).

5. The retractable liquid-absorbing structure according to claim 2, characterized in that: The outer wall of the pumping part (302) near the dropper component (200) is formed with the abutment part (3021) along a longitudinal protrusion, and the outer wall of the abutment part (3021) and the inner wall of the external cover (101) are arranged at a distance.

6. The retractable liquid-absorbing structure according to claim 1, characterized in that: The pumping part (302) includes a first connection part (3023) connected to the dropper part (200), and the dropper part (200) includes a second connection part (204) matched with the first connection part (3023).

7. The retractable liquid-absorbing structure according to claim 6, characterized in that: One of the first connecting portion (3023) and the second connecting portion (204) is provided with an annular groove (3023a); the other of the first connecting portion (3023) and the second connecting portion (204) is provided with an annular protrusion (2041), and the annular protrusion (2041) is adapted to the annular groove (3023a).

8. The retractable liquid-absorbing structure according to claim 1, characterized in that: The pumping portion (302) includes a plurality of annular telescopic portions (3024) arranged along the axial direction and extending radially outward, the annular telescopic portion (3024) includes a first inclined surface (3024a), a second inclined surface (3024b) arranged opposite to the first inclined surface (3024a), and a transition surface (3024c) connected between the first inclined surface (3024a) and the second inclined surface (3024b), an angle ∠α is formed between the extension lines of the first inclined surface (3024a) and the second inclined surface (3024b), and ∠α=90°±1°.

9. The retractable liquid-absorbing structure according to claim 8, characterized in that: An angle ∠β is formed between the first inclined surface (3024a) of any annular telescopic portion (3024) and the extension line of the second inclined surface (3024b) of another adjacent annular telescopic portion (3024), and ∠β=90°±1°.

10. The retractable liquid absorbing structure according to claim 1, characterized in that: The pumping component (300) is made of silicone material.

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