Sucking disc

Abstract

The suction cup comprises a suction cup cover, a pressing assembly, a suction cup assembly and a supporting part, the suction cup cover is provided with a vertically-through channel, the pressing assembly is installed in the channel in a sliding mode, the pressing assembly is provided with a warning part, and the suction cup assembly is covered by the suction cup cover and penetrates through the channel to be connected with the pressing assembly. The supporting part comprises at least two protruding parts protruding from the bottom of the suction cup cover, and a receding gap needed by opening of the suction cup assembly is formed between the protruding parts. The supporting parts can facilitate pressing and adsorption of the suction cup assembly, the supporting parts are at least two protruding parts at the bottom of the suction cup cover, the suction cup assembly can be fully opened in the area between the protruding parts, a sufficient receding gap can be provided for the suction cup assembly, the suction cup assembly can fully extrude air, and therefore the adsorption effect can be improved, and the service life of the suction cup assembly is prolonged. The pressing assembly is provided with a warning part, and whether the pressing assembly is pressed in place or not can be observed through the warning part, so that a user can conveniently perceive the mounting effect of the suction cup.

Description

Technical Field

[0001] The utility model relates to the technical field related to connecting pieces, in particular to a suction cup. Background Art

[0002] At present, the pressing suction cup products are very popular in the market because they can adsorb to the base surface without damaging the wall surface. The adsorption effect of the suction cup is closely related to the vacuum degree of the suction cup, and one of the factors affecting the vacuum degree is whether the suction cup can completely fit the wall surface under the force and eliminate the air between the suction cup and the base surface. Setting a suction cup cover on the suction cup can help the suction cup to stably adsorb to the wall surface, and also ensure that the suction cup product is beautiful and popular with consumers. However, the setting of the suction cup cover limits the deformation of the suction cup under the force, making the suction cup incompletely unfolded, causing part of the air between the suction cup and the base surface to be unable to be squeezed out, affecting the vacuum degree between the suction cup and the base surface, and then affecting the adsorption performance of the suction cup.

[0003] In addition, due to personal factors, the force applied to the suction cup is different, resulting in different suction cup installation effects. If the pressing force is small, the suction cup is not installed properly, and it is difficult for the user to feel that the suction cup is not installed properly. The suction cup is easy to fall off after installation, affecting the use of the suction cup. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a suction cup, which can improve the suction performance of the suction cup and can sense the installation effect.

[0005] A suction cup according to an embodiment of the first aspect of the utility model includes: a suction cup cover, a pressing assembly, a suction cup assembly and a supporting portion, the suction cup cover has a channel running through from top to bottom, the pressing assembly can be slidably installed in the channel, a warning portion is provided on the pressing assembly, the suction cup assembly is covered by the suction cup cover and connected to the pressing assembly through the channel, the supporting portion includes at least two protrusions protruding from the bottom of the suction cup cover, and a gap is provided between the protrusions for the suction cup assembly to open.

[0006] A suction cup according to an embodiment of the utility model has at least the following beneficial effects: the supporting portion can support the suction cup cover and the surface to be installed so that the suction cup assembly can be pressed and adsorbed, and the supporting portion is at least two protrusions on the bottom of the suction cup cover, and the area between the protrusions can allow the suction cup assembly to fully open, and can provide sufficient space for the suction cup assembly to fully squeeze out the air, thereby improving the adsorption effect, and the pressing assembly is provided with a warning portion, through which it can be observed whether the pressing assembly is pressed into place, so that the user can perceive the installation effect of the suction cup.

[0007] According to some embodiments of the present utility model, the highest points of the protrusions are substantially in the same installation plane, and the sliding direction of the pressing assembly is perpendicular to the installation plane.

[0008] According to some embodiments of the present utility model, the number of the protrusions is two, and they are located on the diameter line of the suction cup assembly.

[0009] According to some embodiments of the present utility model, the number of the protrusions is three, and they are evenly distributed around the center of the suction cup assembly.

[0010] According to some embodiments of the present utility model, the suction cup cover includes a hook portion, and one of the support portions protrudes from the bottom of the hook portion.

[0011] According to some embodiments of the present utility model, the number of the protrusions at the bottom of the suction cup cover is two, and the number of the protrusions at the bottom of the hook portion is one. The three protrusions are symmetrically arranged along the connection line between the protrusion at the bottom of the hook portion and the center of the suction cup cover.

[0012] According to some embodiments of the present utility model, the channel includes a sliding groove, and an elastic member is provided between the sliding groove and the pressing assembly. When the pressing assembly is pressed, the suction cup assembly adsorbs the base surface, and the warning portion slides into the channel.

[0013] According to some embodiments of the present utility model, the pressing assembly further includes a pressing head, and the pressing head is clamped with the warning portion.

[0014] According to some embodiments of the present utility model, the maximum sliding stroke of the pressing assembly in the channel is H. When the sliding stroke of the pressing assembly out of the channel is greater than 0.35H, the warning portion exposes the suction cup cover.

[0015] According to some embodiments of the present utility model, the sliding groove opens upward, and a first through hole is provided on the bottom wall of the sliding groove. The suction cup assembly passes through the first through hole and is fixedly connected with the pressing assembly.

[0016] According to some embodiments of the present utility model, the first through hole is a triangular or square or pentagonal through hole to limit the rotation of the suction cup assembly.

[0017] According to some embodiments of the present utility model, the suction cup assembly includes a suction cup member and a pressing plate, and the pressing plate is arranged on the top of the suction cup member through a clamping structure.

[0018] According to some embodiments of the present utility model, a connecting column is provided on the top of the suction cup member. The clamping structure includes an avoidance hole and a clamping portion. The avoidance hole is provided on the pressing plate, and the clamping portion is provided on the side wall of the connecting column. The clamping portion can pass through the avoidance hole, and by rotating the connecting column, the clamping portion can be clamped with the pressing plate.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0021] Figure 1 is a schematic structural diagram of some embodiments of the present utility model;

[0022] Figure 2 is Figure 1 exploded view of;

[0023] Figure 3 is Figure 1 sectional view of;

[0024] Figure 4 is Figure 1 sectional view of;

[0025] Figure 5 is a schematic structural diagram of the suction cup assembly;

[0026] Figure 6 is the exploded view of the suction cup assembly;

[0027] Figure 7 is a schematic structural diagram of some embodiments of the present utility model;

[0028] Figure 8 is a schematic structural diagram of some embodiments of the present utility model;

[0029] Figure 9 is Figure 8 exploded view of;

[0030] Figure 10 is Figure 8 sectional view of.

[0031] Reference numerals:

[0032] suction cup cover 100, channel 110, sliding groove 111, first through hole 1111, hook portion 120;

[0033] pressing assembly 200, warning portion 210, pressing head 220;

[0034] suction cup assembly 300, suction cup member 310, connecting column 311, pressing plate 320, clamping structure 330, avoidance hole 331, clamping portion 332;

[0035] support portion 400, protruding portion 410;

[0036] Elastic member 500. Specific embodiments

[0037] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" should be construed in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0040] Refer to Figures 1 to 4, A suction cup according to an embodiment of the first aspect of the present utility model includes a suction cup cover 100, a pressing assembly 200, a suction cup assembly 300 and a support portion 400. The suction cup cover 100 has a vertically penetrating channel 110. The pressing assembly 200 is slidably installed in the channel 110. A warning portion 210 is provided on the pressing assembly 200. The suction cup assembly 300 is covered by the suction cup cover 100 and passes through the channel 110 to be connected to the pressing assembly 200. The support portion 400 includes at least two protruding portions 410 protruding from the bottom of the suction cup cover 100. A clearance is provided between the protruding portions 410 for the suction cup assembly 300 to open. The support portion 400 can support the suction cup cover 100 and the surface to be installed, so that the suction cup assembly 300 can press and adsorb. The support portion 400 is at least two protruding portions 410 at the bottom of the suction cup cover 100, and the area between each protruding portion 410 can allow the suction cup assembly 300 to fully open, providing sufficient clearance for the suction cup assembly 300 to fully squeeze out air, thereby improving the adsorption effect. The pressing assembly 200 is provided with a warning portion 210. Through the warning portion 210, it can be observed whether the pressing assembly 200 is pressed in place, so as to facilitate the user to perceive the installation effect of the suction cup.

[0041] Specifically, the pressing assembly 200 is slidably disposed in the channel 110 of the suction cup cover 100. The suction cup cover 100 has a groove. The suction cup assembly 300 is located in the groove and is covered by the suction cup cover 100. The pressing assembly 200 and the suction cup assembly 300 can be connected to each other at the channel 110. The specific connection method is not limited herein, so that the pressing assembly 200 can drive the suction cup assembly 300 to press against the plane to be installed. The support portion 400 is provided at the bottom of the suction cup cover 100. The support portion 400 can be provided with two protruding portions 410. The two protruding portions 410 can be spaced along the contour of the suction cup cover 100. The protruding portions 410 can support the plane to be installed, so as to facilitate the user to operate the pressing assembly 200. The distance between the two protruding portions 410 can satisfy the full opening of the suction cup assembly 300, providing sufficient clearance, so that the suction cup assembly 300 can fully squeeze out air, improving the adsorption effect of the suction cup. A warning portion 210 is provided on the pressing assembly 200. When the user presses the pressing assembly 200, the warning portion 210 can be observed to perceive the installation effect. It can be understood that the pressing assembly 200 and the suction cup cover 100 move relative to each other, and the warning portion 210 can intuitively reflect the relative movement situation, so as to facilitate the user to judge the installation effect. The specific structure of the warning portion 210 is not detailed herein. Through the above structure, it is both convenient for the user to perceive the installation effect and can improve the adsorption effect of the suction cup.

[0042] Refer to Figure 3, in some embodiments of the present utility model, the highest points of the protrusions 410 are substantially in the same installation plane, and the sliding direction of the pressing assembly 200 is perpendicular to the installation plane. The user can complete the installation without adjusting the pressing direction, which is convenient for installation and has a good installation effect.

[0043] Specifically, the protrusions 410 protrude from the bottom of the suction cup cover 100, and the bottom ends of the protrusions 410 can jointly define an installation plane, that is, the highest points of the protrusions 410 are approximately in the same installation plane. The suction cup cover 100 can be abutted and positioned against the plane to be installed. The installation plane defined by the protrusions 410 of the support portion 400 is parallel to the plane to be installed, and the sliding direction of the pressing assembly 200 is perpendicular to the installation plane, so that the suction cup assembly 300 can fully cooperate with the plane to be installed. The user can fully squeeze out the air between the suction cup and the installation plane without adjusting the pressing direction, which can improve the installation effect of the suction cup and can also be installed in place as much as possible at one time, and the operation is convenient.

[0044] In some embodiments of the present utility model, the protrusions 410 are provided in two and are located on the diameter line of the suction cup assembly 300. On the premise of stable support, the manufacturing cost can be reduced, and a larger deformation space can be provided for the suction cup assembly 300.

[0045] Specifically, the protrusion 410 can be set as a convex block with a certain plane fitting area at the end. The suction cup cover 100 covers the suction cup assembly 300, and the suction cup cover 100 and the suction cup assembly 300 are arranged coaxially. The two protrusions 410 can be arranged at a position where the connection line between them can pass through the center of the suction cup assembly 300, so that the suction cup cover 100 can be stably abutted and positioned against the plane to be installed, and it is not easy to deviate. Thus, the sliding direction of the pressing assembly 200 can be perpendicularly matched with the plane. Moreover, the number of the protrusions 410 is small, the manufacturing cost is low, and a larger avoidance space can be provided for the suction cup assembly 300.

[0046] In some embodiments of the present utility model, the protrusions 410 are provided in three and are evenly distributed around the center of the suction cup assembly 300. The supporting effect of the support portion 400 can be further improved.

[0047] Specifically, the protrusions 410 can be provided in three. The three protrusions 410 can be evenly spaced along the circumferential direction of the suction cup assembly 300 and arranged on the suction cup cover 100. The three protrusions 410 can be spaced 120° from each other around the center of the suction cup assembly 300, which can further improve the supporting effect of the support portion 400.

[0048] In some embodiments of the present utility model, the suction cup cover 100 includes a hook portion 120, and one of the support portions 400 is a protrusion at the bottom of the hook portion 120. The positioning effect can be improved.

[0049] Specifically, the suction cup cover 100 can be provided with a hook portion 120. The hook portion 120 can be used by the user to hang items. The suction cup cover 100 is generally circular in shape, and the hook portion 120 extends horizontally at the side portion of the suction cup cover 100. In order to prevent the suction cup from shifting towards the hook portion 120, the support portion 400 can be provided at the hook portion 120, and a protruding portion 410 can be provided at the bottom of the hook portion 120, so that both the bottom of the hook portion 120 and the bottom of the suction cup cover 100 can form an installation plane through the protruding portion 410, which can improve the positioning effect.

[0050] Refer to Figure 7 , in some embodiments of the present invention, two protruding portions 410 are provided at the bottom of the suction cup cover 100, and one protruding portion 410 is provided at the bottom of the hook portion 120. The three protruding portions 410 are symmetrically arranged along the connection line between the protruding portion 410 at the bottom of the hook portion and the center of the suction cup cover 100. This enables the suction cup cover 100 and the hook portion 120 to stably abut against the plane to be installed, not easily shift, and further facilitates the adsorption of the suction cup assembly 300.

[0051] Specifically, the hook portion 120 can extend outward from the center of the suction cup cover 100. When hanging and bearing force, the force direction is connected to the center of the suction cup assembly 300, and no moment offset from the center of the suction cup assembly 300 will be formed, making the suction cup not easily fall off. Two protruding portions 410 can be provided at the bottom of the suction cup cover 100, and one protruding portion 410 can be provided at the hook portion 120. The protruding portion 410 of the hook portion 120 can be provided at the bottom of the hook portion 120 far from the suction cup cover 100 end, and the midpoint of the protruding portion 410 can be located at the midline of the hook portion 120. The midline of the hook portion 120 intersects with the center of the suction cup cover 100, then the connection line between the midpoint of the protruding portion 410 and the midpoint of the suction cup cover 100 is used as the symmetry line, and the two protruding portions 410 of the suction cup cover 100 are symmetrically arranged along the symmetry line, so that the suction cup cover 100 and the hook portion 120 can stably abut against the plane to be installed, not easily shift, and further facilitates the adsorption of the suction cup assembly 300.

[0052] Refer to Figures 3 to 4, in some embodiments of the present utility model, the channel 110 includes a sliding groove 111, and an elastic member 500 is provided between the sliding groove 111 and the pressing assembly 200. When the pressing assembly 200 is pressed, the suction cup assembly 300 adsorbs the base surface, and the warning portion 210 slides into the channel 110. Specifically, the elastic member 500 can be a spring, and the pressing assembly 200 can cooperate with the sliding groove 111 to slide up and down, so that the user can apply force to the suction cup assembly 300 for adsorption. The warning portion 210 provided at the pressing assembly 200 can be pressed down with the pressing assembly 200 and can sink into the channel 110, that is, into the sliding groove 111. The warning portion 210 can be set as a component with an obvious warning color. The bottom of the spring can abut against the bottom wall of the sliding groove 111, and the top can abut against the pressing assembly 200. After installation, the spring applies an elastic force towards the pressing assembly 200. When the suction force of the suction cup assembly 300 decays, the elasticity will be able to drive the pressing assembly 200 to move upwards. At this time, the warning portion 210 can expose the suction cup cover 100. When the user observes the warning portion 210, they can know that the suction of the suction cup has decreased, which can play a warning effect.

[0053] It can be understood that the elastic member 500 can also be made of elastic materials such as silica gel parts and rubber parts.

[0054] Refer to Figures 2 to 4 and Figures 8 to 10 , in some embodiments of the present utility model, the pressing assembly 200 further includes a pressing head 220, and the pressing head 220 is snap-connected to the warning portion 210. Specifically, the warning portion 210 can be set to an eye-catching color. The pressing head 220 is located above for the user to press, and the warning portion 210 is located below. The pressing head 220 and the warning portion 210 can be snap-connected, and the assembly is relatively convenient.

[0055] It can be understood that the connection manner between the pressing head 220 and the warning portion 210 can also be threaded connection, welding, etc.

[0056] Refer to Figure 3 , in some embodiments of the present utility model, the maximum sliding stroke of the pressing assembly 200 in the channel 110 is H. When the sliding stroke of the pressing assembly 200 out of the channel 110 is greater than 0.35H, the warning portion 210 exposes the suction cup cover 100. This makes the prompt of the warning portion 210 more accurate and less likely to have false prompts.

[0057] Specifically, during installation, the bottom of the suction cup assembly 300 abuts against the plane to be installed. When the pressing assembly 200 is pressed down, the suction cup assembly 300 deforms and expels air. When the suction cup assembly 300 finishes expelling air, the pressing stroke of the pressing assembly 200 is H. At this time, the suction effect of the suction cup assembly 300 is the best. After long-term use of the suction cup, air will slowly enter, and the suction cup assembly 300 will gradually rebound upward. The pressing assembly 200 also slides upward. Through experiments, when the pressing assembly 200 slides upward by 0.35H, the suction force of the suction cup assembly 300 decays to the point where it is about to be difficult to use normally. At this time, the warning part 210 is exposed from the suction cup cover 100. If the pressing assembly 200 slides further upward, more of the warning part 210 will be exposed, so that the user can perceive the suction effect, and the prompt is more accurate and less likely to give false prompts.

[0058] Referring to Figures 3 to 4 , in some embodiments of the present invention, the sliding groove 111 opens upward, and a first through hole 1111 is provided on the bottom wall of the sliding groove 111. The suction cup assembly 300 passes through the first through hole 1111 and is fixedly connected to the pressing assembly 200. Specifically, a first through hole 1111 penetrating up and down is provided on the bottom wall of the sliding groove 111. The top of the suction cup assembly 300 can be fixedly connected to the pressing assembly 200 through a connecting component passing through the first through hole 1111. The specific connection method is not limited in detail here and can be a clamping connection, a welding connection, a threaded connection, etc., so that the pressing assembly 200 can be drivingly connected to the suction cup assembly 300.

[0059] Referring to Figures 3 to 4 , in some embodiments of the present invention, the first through hole 1111 is set as a triangular or square or pentagonal through hole to limit the rotation of the suction cup assembly 300 to meet the user's usage requirements.

[0060] Specifically, the first through hole 1111 can be set as a square. Under the limitation of the square first through hole 1111, the connecting component between the suction cup assembly 300 and the pressing assembly 200 cannot rotate, thereby restricting the rotation of the suction cup assembly 300 to meet the user's usage requirements.

[0061] It should be noted that the first through hole 1111 can also be set as a non-circular shape such as a triangle or a pentagon.

[0062] Referring to Figures 5 to 6 , in some embodiments of the present invention, the suction cup assembly 300 includes a suction cup member 310 and a pressing plate 320. The pressing plate 320 is arranged on the top of the suction cup member 310 through a clamping structure 330, which is relatively convenient for assembly.

[0063] Specifically, the pressing plate 320 can cooperate with the suction cup member 310 to enable the suction cup member 310 to better adsorb and deform. The pressing plate 320 and the suction cup member 310 can be detachably connected through the clamping structure 330, which is relatively convenient for assembly.

[0064] Reference Figures 5 to 6 In some embodiments of the present invention, a connection column 311 is provided on the top of the suction cup member 310, and the clamping structure 330 includes an avoidance hole 331 and a clamping portion 332. The avoidance hole 331 is provided on the pressing plate 320, and the clamping portion 332 is provided on the side wall of the connection column 311. The clamping portion 332 can pass through the avoidance hole 331, and the connection column 311 is rotated, and the clamping portion 332 can be clamped with the pressing plate 320. The suction cup member 310 and the pressing plate 320 can be assembled, and the installation is relatively convenient.

[0065] Specifically, the middle part of the pressure plate 320 can be set as an avoidance hole 331, and the specific shape of the avoidance hole 331 can be set as a circular hole, and clearance holes are set on both sides of the circular hole. A connecting column 311 with an upward color is set on the top of the suction cup member 310, and the side wall of the connecting column 311 can be provided with two protruding clamping parts 332. During installation, the connecting column 311 and the clamping part can pass through the entire avoidance hole 331. After passing through, the suction cup member 310 is rotated, and the clamping part 332 can be rotated to stagger the clearance hole and can be clamped with the pressure plate 320. At this time, the clamping part 332 cannot pass through the avoidance hole 331, so as to realize the assembly of the suction cup member 310 and the pressure plate 320, and the installation is more convenient.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A suction cup, characterized in that, include: The suction cup cover (100) has a channel (110) running through it from top to bottom; A pressing component (200) is slidably mounted on the channel (110), and a warning portion (210) is provided on the pressing component (200); A suction cup assembly (300), which is covered by the suction cup cover (100) and connected to the pressing assembly (200) through the channel (110); The support portion (400) comprises at least two protrusions (410) protruding from the bottom of the suction cup cover (100), and a gap is provided between the protrusions (410) for the suction cup assembly (300) to open.

2. A suction cup according to claim 1, characterized in that, The highest points of the protrusions (410) are basically in the same installation plane, and the sliding direction of the pressing assembly (200) is perpendicular to the installation plane.

3. A suction cup according to claim 1, characterized in that, The number of the protrusions (410) is two and they are located on the diameter line of the suction cup assembly (300).

4. A suction cup according to claim 1, characterized in that, The number of the protrusions (410) is three and they are evenly distributed around the center of the suction cup assembly (300).

5. A suction cup according to claim 1, characterized in that, The suction cup cover (100) comprises a hook portion (120), and one of the supporting portions (400) is a protrusion at the bottom of the hook portion (120).

6. A suction cup according to claim 5, wherein The suction cup cover (100) has two protruding parts (410) at the bottom, the hook part (120) has one protruding part (410) at the bottom, and the three protruding parts (410) are symmetrically arranged along the line connecting the protruding part (410) at the bottom of the hook part and the center of the suction cup cover (100).

7. A suction cup according to any one of claims 1 to 6, characterized in that, The channel (110) comprises a sliding groove (111), and an elastic member (500) is provided between the sliding groove (111) and the pressing assembly (200). When the pressing assembly (200) is pressed, the suction cup assembly (300) adsorbs the base surface, and the warning portion (210) slides and sinks into the channel (110).

8. A suction cup according to claim 7, characterized in that, The pressing assembly (200) further comprises a pressing head (220), and the pressing head (220) is engaged with the warning portion (210).

9. A suction cup according to claim 8, wherein, The maximum sliding stroke of the pressing component (200) in the channel (110) is H, and when the pressing component (200) slides out of the channel (110) by a stroke greater than 0.35H, the warning portion (210) exposes the suction cup cover (100).

10. A suction cup according to claim 9, characterized in that, The sliding groove (111) opens upward, and a first through hole (1111) is provided on the bottom wall of the sliding groove (111). The suction cup assembly (300) passes through the first through hole (1111) and is fixedly connected to the pressing assembly (200).

11. A suction cup according to claim 10, characterized in that, The first through hole (1111) is configured as a triangular, square or pentagonal through hole to limit the rotation of the suction cup assembly (300).

12. A suction cup according to claim 11, wherein The suction cup assembly (300) comprises a suction cup member (310) and a pressure plate (320), wherein the pressure plate (320) is arranged on the top of the suction cup member (310) via a clamping structure (330).

13. A suction cup according to claim 12, wherein, A connecting post (311) is provided at the top of the suction cup member (310). The clamping structure (330) includes an avoidance hole (331) and a clamping portion (332). The avoidance hole (331) is provided in the pressing plate (320), and the clamping portion (332) is provided on the side wall of the connecting post (311). The clamping portion (332) can pass through the avoidance hole (331), and by rotating the connecting post (311), the clamping portion (332) can be clamped with the pressing plate (320).

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