Sucking disc

Abstract

The utility model discloses a suction cup used for externally connecting an object and aims to solve the problems that an existing suction cup is poor in sealing performance and low in adsorption capacity. One side of the adsorption body is a plane part attached to an adsorbed surface, and the other side of the adsorption body is provided with a connector in the middle and a first abutting part on the outer edge; the pressing disc comprises a connecting part connected to the connector and a first pressure part pressing the first abutting part. When the pressing disc drives the connector to be away from the adsorbed face and drives the middle of the plane part to deform and be away from the adsorbed face, the part, opposite to the first abutting part, of the plane part is pressed on the adsorbed face, and a negative pressure cavity is formed. According to the design, the deformation amplitude of the first abutting part is smaller than that of the plane part through hardness difference, the outer edge of the plane part is tightly attached to the adsorbed face all the time, and therefore the sealing performance and the adsorption force are improved.

Description

Technical Field

[0001] The present application relates to an adsorption device, and in particular to a suction cup for externally loading objects. Background Art

[0002] In daily life, it is often necessary to hang items on walls, windows, and cabinets, such as towel racks in bathrooms, and hooks on walls for hanging cleaning tools such as brooms and mops. Generally, holes are drilled on the relevant plane and a hook or mounting base is installed using screws, or a mounting base is glued using glue. However, the method of using screws requires drilling holes on the relevant plane, which damages the plane. The method of using glue is prone to unstable connection and leaves stains on the relevant plane that are difficult to clean. Therefore, in the prior art, a suction cup is usually used to adsorb the hook or mounting base on the relevant plane to avoid damaging the relevant plane or leaving stains on it. However, the existing suction cup, the adsorption body of which is usually made of a whole piece of soft rubber material, so that each part of the adsorption body is relatively soft. When the pressure plate is used to press the outer edge of the adsorption body and the middle part of the adsorption body is pulled at the same time, the outer edge of the adsorption body will also be greatly deformed, thereby worsening the sealing between the adsorption body and the adsorbed surface, resulting in a decrease in the adsorption capacity of the suction cup.

[0003] To this end, it is necessary to improve the adsorption body to ensure the sealing between it and the adsorbed surface, so as to ensure that the suction cup has a good adsorption effect. Utility Model Content

[0004] The present application aims to solve the problem of elastic skeletons being difficult to flatten in the prior art to a certain extent, and to provide a suction cup with better adsorption force. To this end, the present application provides a suction cup comprising:

[0005] The adsorbent has a flat surface on one side for contacting with the adsorbed surface, and a connecting head in the middle and a first abutting portion on the outer edge on the other side;

[0006] a pressure plate comprising a connecting portion connected to the connecting head and a first pressure portion for pressing the first abutting portion;

[0007] The hardness of the first abutting portion is greater than that of the planar portion, so that when the pressure plate drives the connecting head away from the adsorbed surface to cause the middle part of the planar portion to deform and move away from the adsorbed surface, the part of the planar portion opposite to the first abutting portion is pressed against the adsorbed surface, thereby forming a negative pressure cavity between the planar portion and the adsorbed surface.

[0008] In some embodiments, the pressure plate further includes a main body formed as a shell, the first pressure portion is formed as an annular surface on the outer edge of the main body facing the adsorptive body, and the first abutting portion is formed as a ring opposite to the first pressure portion.

[0009] In some embodiments, a second abutment portion is provided on the adsorbent body, the second abutment portion has the same hardness as the first abutment portion, and is formed into a concentric ring located on the same side of the adsorbent body as the first abutment portion, and the pressure plate also includes a second pressure portion that abuts against the second abutment portion.

[0010] In some embodiments, an annular rib facing the adsorbent is provided in the main body, the annular rib of the second pressure portion is located on the annular surface on one side of the adsorbent, and the second pressure portion and the first pressure portion are located in the same plane.

[0011] In some embodiments, the connecting portion is formed as a cylindrical bushing, a bearing hole extending in a direction perpendicular to the planar portion is provided in the middle of the main body portion, an internal thread is provided on the inner side of the connecting portion, and the connecting head is formed as a stud. When the connecting portion is inserted into the bearing hole and screwed to the connecting head, the connecting head is pulled in a direction away from the adsorbed surface, thereby pulling the middle of the planar portion away from the adsorbed surface, so that a negative pressure cavity is formed between the planar portion and the adsorbed surface.

[0012] In some embodiments, an axially extending anti-rotation rib is provided on the outside of the connecting portion, a anti-rotation groove is located on the inner wall of the bearing hole on the main body, and a baffle is located on the bearing hole close to one end of the adsorbent body. When the connecting portion is located in the bearing hole, one end is against the baffle, and the anti-rotation rib extends into the anti-rotation groove, so that when the main body is rotated by an external force, the connecting portion can be driven to rotate, thereby pulling the connecting head in a direction away from the adsorbed surface.

[0013] In some embodiments, an adjusting member is further included, and a blocking block is provided on the side of the connecting portion away from the adsorbent body. When the connecting portion passes through the bearing hole, the adjusting member can be inserted between the blocking block and the main body to drive the connecting portion away from the adsorbed surface, and then the middle part of the planar portion is pulled away from the adsorbed surface by pulling the connecting head.

[0014] In some embodiments, the distance between the blocking block and the end of the connecting portion on one side of the adsorbent body is greater than the distance between the side of the main body away from the adsorbent body and the baffle, and the adjusting member includes a wedge-shaped portion so that when the connecting portion passes through the bearing hole and abuts against the baffle, a gap is formed between the blocking block and the main body, and the wedge-shaped portion is gradually inserted into the gap between the blocking block and the main body to drive the connecting portion to gradually move away from the adsorbed surface.

[0015] In some embodiments, a plurality of wrenches protruding from the surface of the main body are provided on the outside of the main body.

[0016] In some embodiments, the adjusting member further includes a hook for hanging objects.

[0017] The suction cup of the present application, firstly, sets the hardness of the first abutting portion to be greater than the hardness of the planar portion, so that when the pressure plate presses the adsorbent, the deformation amplitude of the first abutting portion is smaller than the deformation amplitude of the planar portion, so that the deformation amplitude of the portion of the planar portion opposite to the first abutting portion is smaller or not deformed, so that the outer edge of the planar portion is always in close contact with the adsorbed surface, thereby improving the sealing of the suction cup to maintain its adsorption force; secondly, a second abutting portion is provided on the adsorbent, and the second abutting portion and the first abutting portion are concentric rings, thereby forming a double-circle seal, which better ensures the sealing of the suction cup; and, by pulling the connecting head through the adjusting piece, the negative pressure cavity between the suction cup and the adsorbed surface is gradually increased to increase the pressure difference between the negative pressure cavity and the outside world, thereby improving the adsorption force. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 A schematic diagram showing a first viewing angle of the adsorbent disclosed in the present application;

[0020] Figure 2 A schematic diagram showing a second viewing angle of the adsorbent disclosed in the present application;

[0021] Figure 3 shows an overall schematic diagram of the pressure plate disclosed in this application;

[0022] Figure 4 shows a side cross-sectional view of a pressure plate disclosed in the present application;

[0023] Figure 5 A schematic diagram showing a first viewing angle of the main body disclosed in this application;

[0024] Figure 6 A schematic diagram showing a second viewing angle of the main body disclosed in this application;

[0025] Figure 7 A schematic diagram of the connecting portion disclosed in the present application is shown;

[0026] Figure 8 A schematic diagram of the adjustment member disclosed in the present application is shown;

[0027] Figure 9 shows an overall schematic diagram of the suction cup disclosed in this application;

[0028] Figure 10 Shown is an exploded schematic diagram of the suction cup disclosed in this application.

[0029] Reference numerals:

[0030] 1. Adsorbent; 11. Plane portion; 12. Connector; 13. First abutting portion; 14. Second abutting portion;

[0031] 2. Pressure plate; 21. Connecting portion; 211. Anti-rotation rib; 212. Clamping block; 22. First pressure portion; 23. Main body;

[0032] 231, bearing hole; 232, anti-rotation groove; 233, baffle; 234, wrench; 24, second pressure part;

[0033] 3. Adjusting member; 31. Wedge-shaped portion; 32. Hook. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0036] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0037] In addition, in this utility model, the descriptions of "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0038] The present application is described below with reference to specific embodiments and with reference to the accompanying drawings:

[0039] The present application discloses a suction cup, which includes an adsorbent 1 and a pressure plate 2. The adsorbent 1 is used to fit with the adsorbed surface, thereby forming a negative pressure cavity between the suction cup and the adsorbed surface, so that the suction cup is pressed onto the adsorbed surface by the pressure difference between the negative pressure cavity and the outside world. Therefore, the adsorbent 1 is generally made of soft TPE, silicone, rubber (vulcanized) and PVC and other plastic materials, which have good elasticity and flexibility. Figure 1 、 2 As shown, the side facing the adsorbed surface is a flat portion 11, which is used to fit on the adsorbed surface, and the other side is provided with a connecting head 12 located in the middle of the adsorbent 1 and a first abutting portion 13 located on the outer edge. By fitting the flat portion 11 to the adsorbed surface and pressing the first abutting portion 13 at the same time, a sealed cavity is formed between the adsorbent 1 and the adsorbed surface. At this time, the connecting head 12 is pulled to make the middle part of the adsorbent 1 away from the adsorbed surface, so that the pressure in the cavity between the adsorbent 1 and the adsorbed surface is less than the atmospheric pressure, that is, a negative pressure cavity is formed, so that the adsorbent 1 is pressed against the adsorbed surface by the atmospheric pressure. The farther the middle part of the adsorbent 1 is from the adsorbed surface, the larger the volume of the negative pressure cavity, and thus the greater the pressure difference with the outside world, and the greater the adsorption force. Therefore, during the formation of the negative pressure cavity, the adsorptive body 1 needs to undergo elastic deformation, especially the middle part of the adsorptive body 1. Since the adsorptive body 1 needs to maintain a seal with the adsorbed surface, the portion of the planar portion 11 corresponding to the first abutting portion 13 cannot be deformed or can only undergo a slight deformation to prevent the sealing of the negative pressure cavity from disappearing. Therefore, the material of the first abutting portion 13 is set to have a hardness different from that of the portion of the adsorptive body 1 that needs to be deformed. For example, hard PVC, silicone and other materials can be selected. Therefore, when the first abutting portion 13 is compressed, the shape retention ability of the corresponding portion of the adsorptive body 1 is better than that of other parts, so that no deformation or only slight deformation occurs. In addition, as Figure 3 、 4As shown, the pressure plate 2 is provided with a connecting portion 21 and a first pressure portion 22. The connecting portion 21 is used to connect with the connecting head 12 and drive the connecting head 12 away from the adsorbed surface. When the connecting portion 21 is connected to the connecting head 12, the first pressure portion 22 abuts against the first abutting portion 13 and presses the first abutting portion 13, so that the portion of the plane portion 11 located at the outer edge of the adsorbent 1 maintains close contact with the adsorbed surface, thereby forming a negative pressure cavity between the plane portion 11 and the adsorbed surface, so that the suction cup is adsorbed on the adsorbed surface.

[0040] Specifically, if Figure 3-5 As shown, the pressure plate 2 includes a main body 23, which is formed into a shell shape. The shell is open in the direction of the adsorbent 1, thereby forming an annular outer edge of the shell in the direction of the adsorbent 1, so that the outer edge of the shell contacts the adsorbent 1 through an annular surface, which is the first pressure portion 22. Therefore, the first abutting portion 13 is formed into a ring opposite to the first pressure portion 22. First, the first abutting portion 13 is set to be annular, so that the outer edge of the adsorbent 1 can be pressed against the adsorbed surface through the compressed first abutting portion 13, thereby forming a circumferentially compressed sealed space on the contact portion between the plane portion 11 and the adsorbed surface, so as to structurally ensure its sealing; secondly, the first pressure portion 22 is set to be annular, so that the first abutting portion 13 can be uniformly stressed as a whole, so that the adsorbent 1 will not produce excessive deformation of some positions of the adsorbent 1 due to uneven stress at some positions and other positions, thereby causing loss of sealing. Obviously, since the first abutting portion 13 is made of hard material, before the first abutting portion 13 is deformed, its entire ring shape is essentially a whole. Therefore, there is no need to compress all circumferential positions of the first abutting portion 13. It is only necessary to ensure that the first abutting portion 13 is subjected to force at intervals along the circumference, and the distance between two consecutive force points is not too large. For example, the first pressure portion 22 can be set as a number of protrusions protruding toward the first abutting portion 13 in the annular part. This method can form a protrusion by digging out part of the material, thereby reducing the weight of the suction cup. However, there are high requirements for the spacing distance between the several protrusions of the first pressure portion 22 and the material hardness and elastic deformation ability of the first abutting portion 13 and the rest of the adsorptive body 1.

[0041] Obviously, since the entire plane portion 11 needs to be made of soft rubber material, no matter which method is used, when the connector 12 is stretched, the plane portion 11 corresponding to the first abutting portion 13 will undergo elastic deformation. Therefore, in some embodiments, such as Figure 1As shown, the adsorbent 1 is further provided with a second abutting portion 14. The second abutting portion 14 is annular and concentric with the first abutting portion 13 and has the same hardness. It is located on the same side of the adsorbent 1. When the pressure plate 2 presses the first abutting portion 13, it also presses the second abutting portion 14, thereby forming a double-circle seal on the outer edge of the sealing cavity between the plane portion 11 and the adsorbed surface to achieve a better sealing effect. However, it is obvious that the second abutting portion 14 will press the adsorbent 1 when it is pressed, and the radius of the annular portion of the second abutting portion 14 is generally smaller than that of the first abutting portion 13. Therefore, the adverse effect of further sealing by the second abutting portion 14 is that the maximum expandable volume of the sealing cavity between the plane portion 11 and the adsorbed surface may be reduced. However, it is obvious that during the suction cup adsorption process, this maximum volume generally needs to be generated by a large deformation of the adsorbent 1, so it is generally difficult to achieve. Similarly, in order to make the second abutting portion 14 also be compressed when the first abutting portion 13 is compressed, such as Figure 5 As shown, the pressure plate 2 is further provided with a second pressure portion 24 that can abut against the second abutting portion 14 .

[0042] Furthermore, if Figure 5 As shown, in order to ensure that when the first pressure portion 22 is pressed on the first abutting portion 13, the second pressure portion 24 can also be pressed on the second abutting portion 14, an annular rib is extended in the direction of the adsorptive body 1 inside the shell of the main body 23, that is, the annular rib is concentric with the shell edge of the main body 23. When the protruding height of the annular rib reaches the point where the annular surface of the annular rib on one side of the adsorptive body 1 is in the same plane as the first pressure portion 22, the first pressure portion 22 and the second pressure portion 24 can be pressed on the first abutting portion 13 and the second abutting portion 14 respectively at the same time, and the pressures of the first pressure portion 22 and the second pressure portion 24 on the first abutting portion 13 and the second abutting portion 14 are equal or close, thereby avoiding failure of compression of the first abutting portion 13 or the second abutting portion 14.

[0043] In some embodiments, as Figure 4-7 As shown, the connecting portion 21 is a cylindrical bushing, which is installed in a bearing hole 231 on the main body 23 extending perpendicular to the direction of the plane portion 11, and the connecting portion 21 is connected to the connecting head 12 by screwing. When the degree of screwing between the two becomes larger and larger, the connecting portion 21 also drives the connecting head 12 to move continuously away from the adsorbed surface. At this time, the edge of the adsorbent 1 is still pressed against the adsorbed surface, so the sealed cavity space between the two becomes larger and larger, so that the pressure difference between the cavity and the outside world continues to increase.

[0044] Obviously, the screw connection is not the only connection method between the connection part 21 and the connection head 12. It can also be set as a snap connection or other methods. However, the screw connection method can make the pulling effect of the connection part 21 on the connection head 12 more continuous and smooth, avoiding the possible sudden change in the movement of the connection head 12 when connecting with other methods, which may cause the seal between the adsorptive body 1 and the adsorbed surface to deteriorate. In order to facilitate achieving the above purpose, the screw connection method of the connection part 21 and the connection head 12 is preferably provided with an internal thread on the inner side of the connection part 21, and the connection head 12 is configured as a stud. When the connection part 21 passes through the bearing hole 231, it is screwed to the connection head 12 at the same time, thereby pulling the connection head 12.

[0045] Furthermore, in order to facilitate the screw connection between the connecting portion 21 and the connecting head 12, in some embodiments of the present invention, the main body 23 is rotated to drive the connecting portion 21, thereby continuously screwing the connecting portion 21 and the connecting head 12. It is necessary to limit the main body 23 and the connecting portion 21 in the circumferential direction of the plane portion 11 and in the direction perpendicular to the adsorbed surface. Figure 5 、 6 As shown, a baffle 233 is provided on the main body 23 at one end of the bearing hole 231 close to the adsorbent 1 to limit the connection part 21 in a direction perpendicular to the adsorbed surface, and a rotation-stop groove 232 is provided on the inner wall of the bearing hole 231 on the main body 23. Figure 7 As shown, the outer side of the connecting portion 21 is provided with an axially extending anti-rotation rib 211, which can extend into the anti-rotation groove 232 to limit the connecting portion 21 in the circumferential direction of the planar portion 11. When an external force rotates the main body 23, the cooperation between the anti-rotation rib 211 and the anti-rotation groove 232 drives the connecting portion 21 to rotate, thereby causing the connecting portion 21 to be continuously screwed to the connecting head 12, thereby driving the connecting head 12 gradually away from the adsorbed surface, thereby providing a method of uniform force application and relatively simple operation, so that the negative pressure chamber between the adsorbent 1 and the adsorbed surface can be gradually increased by rotating the main body 23.

[0046] Furthermore, since the main body 23 is generally formed as a shell, the outer side of the shell is circular, in order to facilitate the user to grasp the pressure plate 2 for rotation, as shown in FIG. Figure 3 、 5 As shown in Figures 6 and 7, a plurality of wrenches 234 are provided on the outside of the main body 23. The wrenches 234 protrude from the outer surface of the main body 23 and are arranged along the outer circumference of the main body 23. Of course, the wrenches can also be formed as depressions on the outer side of the main body 23, or a combination of depressions and protrusions. Alternatively, the main body 23 can be directly configured to have a shape similar to the stripes on the outer side of a bottle cap to facilitate the user to rotate the main body 23.

[0047] In some embodiments, in order to further adjust the adsorption force of the suction cup, the suction cup of the present invention further includes an adjusting member 3. On the one hand, the adjusting member 3 is used to pull the connecting portion 21 away from the connecting head 12, and on the other hand, it is used to press the edge of the adsorbent 1 onto the adsorbed surface. Figure 4 、 7 As shown, a block 212 is provided on the side of the connection part 21 away from the adsorbent 1. When the connection part 21 is passed into the bearing hole 231, a gap is formed between the block 212 and the main body 23. At this time, by inserting the adjusting member 3 between the block 212 and the main body 23, one side of the adjusting member 3 abuts against the block 212 and the other side against the main body 23, thereby achieving the goal of pulling the connecting head 12 by pulling the connection part 21, and pressing the first abutting part 13 and the second abutting part 14 against the main body 23 to press the edge of the adsorbent 1. Therefore, the thickness of the adjusting member 3 between the block 212 and the main body 23 is adjustable. For example, the adjusting member 3 is an expandable member or a plurality of thin sheets are stacked to change its size, or as Figure 8 As shown, the adjusting member 3 is provided with a wedge-shaped portion 31, that is, at least a portion of the structure on the adjusting member 3 is formed into a shape with gradually increasing thickness. The thinner portion of the wedge-shaped portion 31 is first inserted between the clamping block 212 and the main body 23, and then the adjusting member 3 is gradually pressed, so that the thickness of the portion of the wedge-shaped portion 31 located between the clamping block 212 and the main body 23 gradually increases, thereby achieving the effect of simultaneously pressing the main body 23 and pulling the connecting portion 21. For this purpose, as shown in FIG. Figure 4 As described above, when the connecting portion 21 is assembled into the bearing hole 231, a gap is formed between the clamping block 212 and the main body 23, that is, the distance between the clamping block 212 and the end of the connecting portion 21 located on the side of the adsorptive body 1 is greater than the distance between the side of the main body 23 away from the adsorptive body 1 and the baffle 233, so that when the connecting portion 21 abuts against the baffle 233, the clamping block 212 is exposed to the outside of the main body 23 and forms a gap with the main body 23. At the same time, preferably, the clamping block 212 is an annular surface at one end of the connecting portion 21, and two wedge-shaped portions 31 are provided. When the adjusting member 3 is inserted between the clamping block 212 and the main body 23, the two wedge-shaped portions 31 are symmetrically inserted into the two sides of the connecting portion 21, so that the pulling of the adjusting member 3 on the connecting portion 21 is relatively balanced, thereby preventing the connecting portion 21 from being tilted or deformed due to asymmetric pulling force.

[0048] The suction cup of the present application can be used to hang objects or to carry objects, that is, the suction cup is generally adsorbed on a vertical plane, and the object to be hung or carried and the suction cup are kept relatively fixed vertically, thereby completing the hanging or carrying. Figure 8 、 9As shown in Figures 10 and 11, the adjusting member 3 is provided with a hook 32. The hook 32 can be configured as a fixed part of the adjusting member 3, or as a detachable or movable part of the adjusting member 3. It should be noted that when the adjusting member 3 is provided with a wedge-shaped portion 31, the direction of the pulling force applied to the hook 32 by the attached item when the item is attached should be the same as the direction in which the wedge-shaped portion 31 is engaged between the clamping block 212 and the main body 23. This prevents the hook 32 from being pulled by the attached item, causing the adjusting member 3 to separate from the clamping block 212 and the main body 23, thereby causing the suction cup and the item to fall. Similarly, the adjusting member 3 can also be provided with a mounting seat for direct mounting and combination with other items, or for forming a device such as a rack with multiple suction cups to carry items.

Claims

1. A suction cup, characterized in that: include: The adsorbent (1) has a flat surface portion (11) on one side for contacting with the adsorbed surface, and a connecting head (12) in the middle and a first abutting portion (13) at the outer edge on the other side; A pressure plate (2) comprising a connecting portion (21) connected to the connecting head (12) and a first pressure portion (22) for pressing the first abutting portion (13); The hardness of the first abutting portion (13) is greater than the hardness of the planar portion (11), so that when the pressure plate (2) drives the connecting head (12) away from the adsorbed surface to cause the middle part of the planar portion (11) to deform and move away from the adsorbed surface, the portion of the planar portion (11) opposite to the first abutting portion (13) is pressed against the adsorbed surface, thereby forming a negative pressure cavity between the planar portion (11) and the adsorbed surface.

2. The suction cup according to claim 1, wherein The pressure plate (2) further comprises a main body (23) formed as a shell, the first pressure portion (22) is formed as an annular surface on the outer edge of the main body (23) facing the adsorbent (1), and the first abutting portion (13) is formed as an annular shape opposite to the first pressure portion (22).

3. The suction cup according to claim 2, characterized in that The adsorbent body (1) is provided with a second abutting portion (14), the second abutting portion (14) has the same hardness as the first abutting portion (13), and is formed into a concentric ring located on the same side of the adsorbent body (1) as the first abutting portion (13), and the pressure plate (2) also includes a second pressure portion (24) abutting against the second abutting portion (14).

4. The suction cup according to claim 3, characterized in that An annular rib facing the adsorbent (1) is provided in the main body (23); the annular rib of the second pressure portion (24) is located on the annular surface on one side of the adsorbent (1); and the second pressure portion (24) and the first pressure portion (22) are located on the same plane.

5. The suction cup according to any one of claims 2 to 4, characterized in that: The connecting portion (21) is formed as a cylindrical bushing, the middle portion of the main body (23) is provided with a bearing hole (231) extending in a direction perpendicular to the plane portion (11), the inner side of the connecting portion (21) is provided with an internal thread, and the connecting head (12) is formed as a stud. When the connecting portion (21) is inserted into the bearing hole (231) and is screwed to the connecting head (12), the connecting head (12) is pulled in a direction away from the adsorbed surface, thereby pulling the middle portion of the plane portion (11) away from the adsorbed surface, so that a negative pressure cavity is formed between the plane portion (11) and the adsorbed surface.

6. The suction cup according to claim 5, characterized in that The outer side of the connecting portion (21) is provided with an axially extending anti-rotation rib (211), the main body (23) is provided with a anti-rotation groove (232) located on the inner wall of the bearing hole (231) and a baffle (233) located on the bearing hole (231) close to one end of the adsorbent (1). When the connecting portion (21) is located in the bearing hole (231), one end abuts against the baffle (233), and the anti-rotation rib (211) extends into the anti-rotation groove (232), so that when the main body (23) is rotated by an external force, the connecting portion (21) can be driven to rotate, thereby pulling the connecting head (12) in the direction away from the adsorbed surface.

7. The suction cup according to claim 6, characterized in that The device further comprises an adjusting member (3), wherein a clamping block (212) is provided on the side of the connecting portion (21) away from the adsorbent body (1); when the connecting portion (21) passes through the bearing hole (231), the adjusting member (3) can be clamped between the clamping block (212) and the main body (23) to drive the connecting portion (21) away from the adsorbed surface, and then the middle part of the planar portion (11) is pulled away from the adsorbed surface by pulling the connecting head (12).

8. The suction cup according to claim 7, wherein: The distance between the clamping block (212) and the end of the connecting portion (21) located on one side of the adsorbent (1) is greater than the distance between the side of the main portion (23) away from the adsorbent (1) and the baffle (233). The adjusting member (3) includes a wedge-shaped portion (31), so that when the connecting portion (21) passes through the bearing hole (231) and abuts against the baffle (233), a gap is formed between the clamping block (212) and the main portion (23), and the wedge-shaped portion (31) is gradually clamped into the gap between the clamping block (212) and the main portion (23), so as to drive the connecting portion (21) to gradually move away from the adsorbed surface.

9. The suction cup according to claim 8, wherein A plurality of wrenches (234) protruding from the surface of the main body (23) are provided on the outside of the main body (23).

10. The suction cup according to any one of claims 7 to 9, characterized in that: The adjusting member (3) further comprises a hook (32) for hanging objects.

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