Lipstick with telescopic cover

By designing a detachable telescopic cap structure and sliding protrusions in the lipstick container, the problem of the lack of innovation and fun in existing lipstick containers is solved, improving the user experience and market competitiveness.

CN223943968UActive Publication Date: 2026-02-27COSMAX CHINA INC
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Patent Information

Application Number
CN202520108110.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-16
Publication Date
2026-02-27
Estimated Expiration
2035-01-16

AI Technical Summary

Technical Problem

Existing lipstick container designs lack innovation and fun, making it difficult to meet consumers' needs for personalization and differentiation.

Method used

Design a telescopic cap lipstick. By setting a protrusion at the top of the inner tube of the cap and using a detachable connection and sliding structure, the outer tube of the cap can cover or reveal the protrusion, increasing interactivity and fun.

Benefits of technology

This enhanced the product's market competitiveness and users' desire to purchase, and improved the fun and uniqueness of the user experience.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a lipstick with a telescopic cover, which relates to the technical field of cosmetics, and is characterized in that a protrusion is arranged at the top of an upper cover inner cylinder, the protrusion can be in various novel shapes, and an upper cover outer cylinder can move relative to the upper cover inner cylinder, so that a user can freely control the protrusion to be exposed or shielded by the upper cover outer cylinder; the lipstick cosmetic has interestingness and interactivity during use, the purchase desire of a user can be enhanced, the market competition value of the whole product is improved, and the technical problems that in the prior art, lipstick cosmetics are low in interestingness and uniqueness are solved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cosmetics, especially to a telescopic cover lipstick. BACKGROUND

[0002] With the improvement of consumer aesthetic level and the intensification of market competition, the demand for lipstick products in the market is also increasing. The existing lipstick container design mainly focuses on basic functionality, such as protecting the lipstick from damage and facilitating portability. Common lipstick containers are usually composed of a base, a combination piece, and a lipstick assembly cover. The design is relatively traditional, lacking innovation and interest.

[0003] The current market lipstick packaging design mainly focuses on meeting the most basic functional needs, i.e., protecting the internal lipstick from external environmental influences while facilitating users to carry it with them. However, in today's pursuit of individualization and differentiation, this single design style has already been difficult to attract the attention of consumers. Consumers no longer just satisfy with the basic functions of products, but pay more attention to the appearance design and use experience of products, hoping to express their individuality and taste through the use of these products.

[0004] Therefore, in order to adapt to the changes and development trend of the market, it is necessary to develop novel, unique, and higher aesthetic value lipstick container designs to improve user experience and increase product appeal, thereby better meeting market demand. SUMMARY

[0005] The utility model aims at providing a telescopic cover lipstick to alleviate the technical problem of low interest and uniqueness of lipstick cosmetics in the prior art.

[0006] The telescopic cover lipstick provided by the utility model comprises an upper cover outer cylinder, an upper cover inner cylinder, a connecting member, a base, and a lipstick body.

[0007] The connecting member is connected with the base, the bottom end of the lipstick body extends into the connecting member, and the connecting member has a first outer wall and a second outer wall arranged in steps.

[0008] The upper cover outer cylinder is sleeved on the upper cover inner cylinder, the upper cover outer cylinder is detachably connected with the first outer wall, and the upper cover inner cylinder is detachably connected with the second outer wall.

[0009] The top of the upper cover inner cylinder is provided with a protrusion, and the upper cover outer cylinder can slide relative to the upper cover inner cylinder to cover or expose the protrusion.

[0010] In an optional embodiment,

[0011] The first outer wall is provided with a plurality of first buckling protrusions, which are uniformly spaced along the outer circumferential direction of the first outer wall;

[0012] The inner wall of the upper cover outer cylinder is provided with a first buckling groove, and the plurality of first buckling protrusions can extend into the first buckling groove to buckle the upper cover outer cylinder on the first outer wall.

[0013] In an optional embodiment,

[0014] The second outer wall is provided with a plurality of second buckling protrusions, which are uniformly spaced along the outer circumferential direction of the second outer wall;

[0015] The inner wall of the upper cover inner cylinder is provided with a second buckling groove, and the plurality of second buckling protrusions can extend into the second buckling groove to buckle the upper cover inner cylinder on the second outer wall.

[0016] In an optional embodiment,

[0017] The inner wall of the upper cover outer cylinder is provided with a sliding path along which the upper cover outer cylinder moves relative to the upper cover inner cylinder.

[0018] In an optional embodiment,

[0019] The inner wall of the upper cover outer cylinder is provided with a moving sliding groove forming the sliding path;

[0020] The outer wall of the upper cover inner cylinder is provided with a sliding protrusion;

[0021] The sliding protrusion extends into the moving sliding groove, and the sliding protrusion can move in the moving sliding groove.

[0022] In an optional embodiment,

[0023] The upper end of the moving sliding groove has an upper groove wall, and the lower end of the moving sliding groove has a lower groove wall, which are used to limit the sliding protrusion in the moving sliding groove.

[0024] In an optional embodiment,

[0025] When the sliding protrusion abuts against the upper groove wall, the upper cover outer cylinder covers the protrusion;

[0026] When the sliding protrusion abuts against the lower groove wall, the protrusion is exposed.

[0027] In an optional embodiment,

[0028] The telescopic cover lipstick further comprises an elastic member;

[0029] One end of the elastic member is connected with the upper cover inner cylinder, and the other end of the elastic member is connected with the upper cover outer cylinder.

[0030] In an optional embodiment,

[0031] The upper cover inner cylinder comprises a first inner cylinder segment and a second inner cylinder segment connected with each other;

[0032] An outer diameter of the first inner cylinder segment is greater than an outer diameter of the second inner cylinder segment, and a stepped surface is formed at a connection between the first inner cylinder segment and the second inner cylinder segment;

[0033] An inner wall of the upper cover outer cylinder is provided with a connecting block;

[0034] One end of the elastic member is connected with the stepped surface, and the other end of the elastic member is connected with the connecting block.

[0035] In an optional embodiment,

[0036] The second inner cylinder segment has a gap between an outer wall thereof and an inner wall of the upper cover outer cylinder;

[0037] The protrusion is installed at a top of the second inner cylinder segment, and the top of the second inner cylinder segment extends to both sides to form an upper limiting block, the upper limiting block blocks the gap, and the upper limiting block can abut against the connecting block;

[0038] The inner wall of the upper cover outer cylinder is provided with a lower limiting block, and the lower limiting block can abut against the stepped surface.

[0039] The telescopic cover lipstick has the following advantages: the protrusion can be in various novel shapes, and since the upper cover outer cylinder can move relative to the upper cover inner cylinder, a user can freely control the protrusion to be exposed or blocked by the upper cover outer cylinder, the telescopic cover lipstick has interesting and interactive use, can enhance the user's purchase desire, improve the market competition value of the whole product, and solve the technical problem of low interestingness and uniqueness of the lipstick cosmetic in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0041] Figure 1 The whole structure schematic diagram of the telescopic cover lipstick is provided for the embodiment of the utility model;

[0042] Figure 2 The structure schematic diagram in the pulled-out state of the telescopic cover lipstick is provided for the embodiment of the utility model;

[0043] Figure 3 The structure schematic diagram in the pulled-out state of the telescopic cover lipstick is provided for the embodiment of the utility model;

[0044] Figure 4 The whole structure sectional view of the telescopic cover lipstick of the first embodiment is provided for the embodiment of the utility model;

[0045] Figure 5 The structure schematic diagram of the upper cover outer cylinder in the first embodiment of the telescopic cover lipstick is provided for the embodiment of the utility model;

[0046] Figure 6 The structure schematic diagram of the upper cover outer cylinder in the first embodiment of the telescopic cover lipstick is provided for the embodiment of the utility model;

[0047] Figure 7 The structure schematic diagram of the upper cover inner cylinder in the first embodiment of the telescopic cover lipstick is provided for the embodiment of the utility model;

[0048] Figure 8 The whole structure sectional view of the telescopic cover lipstick of the second embodiment is provided for the embodiment of the utility model;

[0049] Figure 9 The whole structure sectional view of the telescopic cover lipstick of the second embodiment is provided for the embodiment of the utility model.

[0050] Icon: 100 - upper cover outer cylinder;110 - first buckling groove;120 - moving sliding groove;130 - connecting block;140 - lower limiting block;200 - upper cover inner cylinder;210 - second buckling groove;220 - sliding protrusion;230 - first inner cylinder section;240 - second inner cylinder section;250 - upper limiting block;300 - connecting member;310 - first outer wall;311 - first buckling protrusion;320 - second outer wall;321 - second buckling protrusion;400 - base;500 - lipstick body;600 - protrusion;700 - elastic member. DETAILED DESCRIPTION

[0051] The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0052] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] The specific embodiments of the present application will be described in detail below in connection with the drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present application, and are not used to limit the present application.

[0055] As shown in Figure 1 , Figure 2 , Figure 3 The present application provides a telescopic cover lipstick, which comprises an upper cover outer cylinder 100, an upper cover inner cylinder 200, a connecting member 300, a base 400 and a lipstick body 500. The connecting member 300 is connected with the base 400, and the top of the connecting member 300 has an opening to allow the bottom end of the lipstick body 500 to extend into the connecting member 300. The lipstick body 500 is of an existing structure, and the connecting member 300 has a first outer wall 310 and a second outer wall 320 arranged in steps. The outer diameter of the first outer wall 310 is larger than that of the second outer wall 320.

[0056] The inner diameter size of the upper cover outer cylinder 100 is greater than the outer diameter size of the upper cover inner cylinder 200, the upper cover outer cylinder 100 is sleeved on the upper cover inner cylinder 200, the upper cover outer cylinder 100 is detachably connected with the first outer wall 310, the upper cover inner cylinder 200 is detachably connected with the second outer wall 320, and it should be noted that the detachable connection is a buckle connection or a threaded connection, which can realize the quick disassembly and assembly between the upper cover outer cylinder 100 and the first outer wall 310 and the quick disassembly and assembly between the upper cover inner cylinder 200 and the second outer wall 320.

[0057] The top of the upper cover inner cylinder 200 is provided with a protrusion 600, which can be in the shape of candy or a heart, and the specific shape is determined according to the actual situation.

[0058] The upper cover outer cylinder 100 can slide relative to the upper cover inner cylinder 200, so that the upper cover outer cylinder 100 can shield the protrusion 600 or expose the protrusion 600.

[0059] The first outer wall 310 is provided with a plurality of first buckling convex points 311, and the plurality of first buckling convex points 311 are uniformly and spacedly arranged along the outer circumferential direction of the first outer wall 310; the inner wall of the upper cover outer cylinder 100 is provided with a first buckling groove 110, and the plurality of first buckling convex points 311 can extend into the first buckling groove 110 to buckle the upper cover outer cylinder 100 on the first outer wall 310, and the first buckling convex points 311 have a certain elasticity, facilitating the quick disassembly and assembly of the first outer wall 310 and the upper cover outer cylinder 100, so as to freely control the movement of the upper cover outer cylinder 100.

[0060] In an optional embodiment, the second outer wall 320 is provided with a plurality of second buckling convex points 321, and the plurality of second buckling convex points 321 are uniformly and spacedly arranged along the outer circumferential direction of the second outer wall 320; the inner wall of the upper cover inner cylinder 200 is provided with a second buckling groove 210, and the plurality of second buckling convex points 321 can extend into the second buckling groove 210 to buckle the upper cover inner cylinder 200 on the second outer wall 320, and the second buckling convex points have a certain elasticity, facilitating the quick disassembly and assembly of the second outer wall 320 and the upper cover outer cylinder 100.

[0061] The telescopic cover lipstick provided in the embodiment can freely control the exposure or shielding of the protrusion 600 by arranging the protrusion 600 on the top of the upper cover inner cylinder 200, the protrusion 600 can be in various novel shapes, and since the upper cover outer cylinder 100 can move relative to the upper cover inner cylinder 200, the user can freely control the exposure or shielding of the protrusion 600 by the upper cover outer cylinder 100, which has interesting and interactive use, can enhance the user's purchase desire, improve the market competition value of the whole product, and solve the technical problems of low interestingness and uniqueness of the lipstick cosmetic in the prior art.

[0062] Embodiment one

[0063] As Figure 4 shown, in an optional embodiment, the inner wall of the upper cover outer cylinder 100 is provided with a sliding path, and the upper cover outer cylinder 100 moves along the sliding path relative to the upper cover inner cylinder 200.

[0064] Specifically, as Figure 5 , Figure 6 , Figure 7 shown, the inner wall of the upper cover outer cylinder 100 is provided with a moving sliding groove 120, the moving sliding groove 120 forms a sliding path, and the moving sliding groove 120 is specifically an upper and lower sealing structure. The outer wall of the upper cover inner cylinder 200 is provided with a sliding protrusion 220; the sliding protrusion 220 extends into the moving sliding groove 120, and the sliding protrusion 220 can move in the moving sliding groove 120, thereby realizing the movement of the upper cover outer cylinder 100 relative to the upper cover inner cylinder 200.

[0065] In an optional embodiment, the upper end of the moving sliding groove 120 has an upper groove wall, and the lower end of the moving sliding groove 120 has a lower groove wall. The upper groove wall and the lower groove wall are used to limit the sliding protrusion 220 within the moving sliding groove 120, preventing the sliding protrusion 220 from being pulled out of the moving sliding groove 120.

[0066] In an optional embodiment, when the sliding protrusion 220 abuts against the upper groove wall, the upper cover outer cylinder 100 covers the protrusion 600; when the sliding protrusion 220 abuts against the lower groove wall, the protrusion 600 is exposed.

[0067] When in use, the upper cover is pulled upward. When pulling, the upper cover outer cylinder 100 is first pulled out upward along the internal moving sliding groove 120, and at the same time, the top protrusion 600 body is gradually hidden inside the upper cover outer cylinder 100 with the upward movement of the upper cover outer cylinder 100. When the upper cover outer cylinder 100 is pulled to the upper groove wall position of the moving clamping groove, the upper cover inner cylinder 200 is pulled out only after being separated from the second buckling protrusion 321. At this time, the lipstick upper cover is completely pulled out, and the top protrusion 600 body is in a hidden state. Conversely, when the upper cover is put on, the upper cover inner cylinder 200 is first in contact with the second buckling protrusion 321 to be fixed, and then the upper cover outer cylinder 100 slides downward along the internal moving sliding groove 120. At the same time, the top protrusion 600 body gradually appears upward, and the upper cover outer cylinder 100 is slid to the lower groove wall position and combined with the first buckling protrusion 311 to be fixed. The upper cover is completely fixed.

[0068] Embodiment two

[0069] As Figure 8 , Figure 9 shown, the telescopic cover lipstick further includes an elastic member 700, which is specifically a compression spring. One end of the elastic member 700 is connected with the upper cover inner cylinder 200, and the other end of the elastic member 700 is connected with the upper cover outer cylinder 100. The elastic member 700 is configured to enable the upper cover outer cylinder 100 to have a movement trend towards the direction away from the base 400.

[0070] Specifically, when the protrusion 600 is in the exposed state, the upper cover outer cylinder 100 is in the lowest position, at this time the elastic member 700 is compressed, when the upper cover outer cylinder 100 is pulled out, the elasticity of the elastic member 700 is released, the upper cover outer cylinder 100 is in the highest position, and the protrusion 600 is covered in the upper cover outer cylinder 100.

[0071] In an optional embodiment, the upper cover inner cylinder 200 comprises a first inner cylinder segment 230 and a second inner cylinder segment 240 connected to each other; the outer diameter of the first inner cylinder segment 230 is larger than that of the second inner cylinder segment 240, and a stepped surface is formed at the connection between the first inner cylinder segment 230 and the second inner cylinder segment 240; the inner wall of the upper cover outer cylinder 100 is provided with a connecting block 130, the connecting block 130 is a circular ring structure, one end of the elastic member 700 is connected to the stepped surface, and the other end of the elastic member 700 is connected to the connecting block 130, so as to fix the elastic member 700 between the stepped surface and the connecting block 130, and the elastic force of the elastic member 700 acts on the upper cover outer cylinder 100.

[0072] In an optional embodiment, due to the smaller outer diameter of the second inner cylinder segment 240, there is a gap between the outer wall of the second inner cylinder segment 240 and the inner wall of the upper cover outer cylinder 100; the protrusion 600 is installed on the top of the second inner cylinder segment 240, and the top of the second inner cylinder segment 240 extends to both sides to form an upper limiting block 250, which blocks the gap, and the upper limiting block 250 can abut against the connecting block 130, so that the upper limiting block 250 limits the highest position of the upper cover outer cylinder 100; when the connecting block 130 abuts against the upper limiting block 250, the upper cover outer cylinder 100 is in the highest position relative to the upper cover inner cylinder 200; the inner wall of the upper cover outer cylinder 100 is provided with a lower limiting block 140, which can abut against the stepped surface, so that the stepped surface limits the lowest position of the upper cover outer cylinder 100; when the stepped surface abuts against the lower limiting block 140, the upper cover outer cylinder 100 is in the lowest position relative to the upper cover inner cylinder 200, thereby limiting the relative displacement stroke of the upper cover outer cylinder 100 relative to the upper cover inner cylinder 200.

[0073] When using, the upper cover outer cylinder 100 is pulled upward, the upper cover outer cylinder 100 and the first buckling convex point 311 are pulled out when being pulled, the elastic force of the elastic member 700 is released, the upper cover outer cylinder 100 is popped up to the limited position, and the top protruding body 600 is shielded in the inside of the upper cover outer cylinder 100 with the upward pop-up of the upper cover outer cylinder 100, after being pulled upward again, the upper cover inner cylinder 200 and the second buckling convex point 321 are pulled out, at this moment, the lipstick cover is completely pulled out, and the top protruding body 600 is in a hidden state, contrarily, when covering the upper cover, the upper cover inner cylinder 200 is first contacted and fixed with the second buckling convex point 321, the upper cover outer cylinder 100 is then slid downward to extrude the inside elastic member 700, the top protruding body 600 is gradually shown upward while sliding, the upper cover outer cylinder 100 is combined and fixed with the second buckling convex point 321, the spring member is contracted and compressed, and the upper cover is completely fixed.

[0074] The retractable cover lipstick changes the single use of the ordinary lipstick package material, makes the whole product more diverse, increases the interesting and interactive nature, and makes the whole product more interesting, novel and unique.

[0075] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A retractable cap lipstick characterized by, The utility model relates to a retractable cover lipstick, which comprises an upper cover outer cylinder (100), an upper cover inner cylinder (200), a connecting member (300), a base (400) and a lipstick body (500). The connecting member (300) is connected with the base (400), the bottom end of the lipstick body (500) extends into the connecting member (300), and the connecting member (300) has a first outer wall (310) and a second outer wall (320) arranged in a stepped manner. The upper cover outer cylinder (100) is sleeved on the upper cover inner cylinder (200), the upper cover outer cylinder (100) is detachably connected with the first outer wall (310), and the upper cover inner cylinder (200) is detachably connected with the second outer wall (320). The top of the upper cover inner cylinder (200) is provided with a protrusion (600), and the upper cover outer cylinder (100) can slide relative to the upper cover inner cylinder (200) so that the upper cover outer cylinder (100) can shield the protrusion (600) or expose the protrusion (600).

2. The retractable cover lipstick according to claim 1, wherein the first outer wall (310) is provided with a plurality of first buckling protrusions (311) which are uniformly and spacedly arranged along the outer circumferential direction of the first outer wall (310); the inner wall of the upper cover outer cylinder (100) is provided with a first buckling groove (110), and the plurality of first buckling protrusions (311) can extend into the first buckling groove (110) to buckle the upper cover outer cylinder (100) on the first outer wall (310).

3. The retractable cover lipstick according to claim 2, wherein the second outer wall (320) is provided with a plurality of second buckling protrusions (321) which are uniformly and spacedly arranged along the outer circumferential direction of the second outer wall (320); the inner wall of the upper cover inner cylinder (200) is provided with a second buckling groove (210), and the plurality of second buckling protrusions (321) can extend into the second buckling groove (210) to buckle the upper cover inner cylinder (200) on the second outer wall (320).

4. The retractable cover lipstick according to claim 3, wherein the inner wall of the upper cover outer cylinder (100) is provided with a sliding path, and the upper cover outer cylinder (100) moves relative to the upper cover inner cylinder (200) along the sliding path.

5. The retractable cover lipstick according to claim 4, wherein the inner wall of the upper cover outer cylinder (100) is provided with a moving sliding groove (120) which forms the sliding path; the outer wall of the upper cover inner cylinder (200) is provided with a sliding protrusion (220); and the sliding protrusion (220) extends into the moving sliding groove (120) and can move in the moving sliding groove (120).

6. The retractable cover lipstick according to claim 5, wherein ​ An upper end of the moving sliding groove (120) has an upper groove wall, and a lower end of the moving sliding groove (120) has a lower groove wall, which are used to limit the sliding protrusion (220) in the moving sliding groove (120). 7.The retractable lipstick of claim 6, wherein, When the sliding protrusion (220) abuts against the upper groove wall, the upper cap outer cylinder (100) covers the protrusion (600); When the sliding protrusion (220) abuts against the lower groove wall, the protrusion (600) is exposed. 8.The retractable lipstick of claim 3, wherein, The retractable lipstick further comprises an elastic member (700); One end of the elastic member (700) is connected with the upper cap inner cylinder (200), and the other end of the elastic member (700) is connected with the upper cap outer cylinder (100), and the elastic member (700) is configured to enable the upper cap outer cylinder (100) to have a movement trend of moving away from the base (400). 9.The retractable lipstick of claim 8, wherein, The upper cap inner cylinder (200) comprises a first inner cylinder segment (230) and a second inner cylinder segment (240) connected with each other; An outer diameter of the first inner cylinder segment (230) is greater than an outer diameter of the second inner cylinder segment (240), and a stepped surface is formed at a connection between the first inner cylinder segment (230) and the second inner cylinder segment (240); An inner wall of the upper cap outer cylinder (100) is provided with a connecting block (130); One end of the elastic member (700) is connected with the stepped surface, and the other end of the elastic member (700) is connected with the connecting block (130). 10.The retractable lipstick of claim 9, wherein, An outer wall of the second inner cylinder segment (240) and an inner wall of the upper cap outer cylinder (100) have a gap therebetween; The protrusion (600) is installed at a top of the second inner cylinder segment (240), and the top of the second inner cylinder segment (240) extends to both sides to form an upper limiting block (250), the upper limiting block (250) blocks the gap, and the upper limiting block (250) can abut against the connecting block (130); The inner wall of the upper cap outer cylinder (100) is provided with a lower limiting block (140), and the lower limiting block (140) can abut against the stepped surface.