Suction cup requiring small pressing force

Abstract

A suction cup structure requiring a small pressing force, comprising a suction cup (100). The suction cup comprises a back plate (120) and a rubber body (110), wherein the rubber body is tightly bonded to one side of the back plate, and a connecting portion (125) is provided on the other side of the back plate; the back plate is made of a rigid material, and the rubber body is made of a soft material; and the back plate comprises an inner ring portion (121) and an outer ring portion (122), the outer ring portion being arranged around the inner ring portion, the curvature of the inner ring portion being set to X1, and the curvature of the outer ring portion being set to Y1, where Y1>X1. The rubber body is tightly bonded to one side of the back plate, and the rigid back plate can assist with the attachment of the soft rubber body, thereby improving the attachment effect. The inner ring portion of the back plate is relatively flat, i.e., approximately in the shape of a flat plate, and the outer ring portion is relatively curved, so that when the back plate is pressed, a force is applied to the middle of the inner ring portion, and the inner ring portion is deformable, thereby reducing the required force. Moreover, the rubber body has a better force distribution, thereby improving the attachment effect of the suction cup while reducing the pressing force.

Description

A suction cup with low pressing pressure Technical Field

[0001] This invention relates to a suction cup, and more particularly to a suction cup requiring low pressing pressure. Background Technology

[0002] Suction cups generally consist of a suction cup cover, a back plate, and a suction cup adhesive surface. The adhesive surface covers the back plate, which is located within the suction cup cover. Users press the back plate against the wall, causing it to deform and thus adhering the adhesive surface to the wall. However, existing suction cup structures have the following drawbacks:

[0003] (1) The back panel is generally designed with a curved surface, which makes the required pressing force on the back panel greater and inconvenient for users to operate.

[0004] (2) When pressing, the back plate cannot effectively transfer force to the adhesive surface, resulting in insufficient pressing force. This prevents the adhesive surface from fully adhering to the wall, making it easy for air to enter at the edge of the suction cup, thus reducing the adsorption effect and affecting the load-bearing capacity of the suction cup. To solve this problem, suction cups with a skeleton, adhesive body, and pressure plate have been developed. The skeleton is set in the adhesive body, and the pressure plate can cooperate with the adhesive body to assist the adhesive body in adsorption and improve the adsorption effect. However, this type of suction cup structure is relatively complex, has a high manufacturing cost, and has many parts, which also affects the fit between the parts and thus affects the performance of the product.

[0005] (3) Most existing suction cups have a bowl-shaped suction cup cavity on the adhesive surface. When the suction cup is in action, the air inside the suction cup cavity is expelled, forming a narrow annular suction edge at the edge of the suction cup. When the suction cup is under load, air can easily leak from the suction edge, causing the suction cup cavity to lose its vacuum and the suction cup to fall off. Summary of the Invention

[0006] The purpose of this invention is to provide a suction cup that requires less pressing force, can improve the adsorption effect, and is easy for users to operate.

[0007] The objective of this invention is achieved through the following technical solution: a suction cup with low pressing pressure, characterized in that it includes a suction cup component, the suction cup component including a back plate and an adhesive body, the adhesive body being tightly bonded to one side of the back plate, and a connecting portion being provided on the other side of the back plate, the back plate being made of a rigid material, the adhesive body being made of a soft material, the back plate including an inner ring portion and an outer ring portion, the outer ring portion surrounding the inner ring portion, the curvature of the inner ring portion being set as X1, the curvature of the outer ring portion being set as Y1, Y1 > X1.

[0008] The colloid of this invention is tightly bonded to one side of the back plate, which simplifies the suction cup structure and facilitates processing while maintaining the adsorption effect. The rigid back plate provides support and pressure for the soft colloid, improving the load-bearing capacity and adsorption capacity of the suction cup. The rigid back plate can assist the soft colloid in adsorption, which can improve the adsorption effect. Since Y1>X1, the inner ring of the back plate is set to be relatively flat, while the outer ring is set to be more curved. When the back plate is pressed, force is applied to the middle of the inner ring. The inner ring is easy to deform, which can reduce the amount of force required. At the same time, when the inner ring deforms, it can drive the outer ring to press and adsorb the colloid, resulting in better force on the colloid. This can improve the adsorption effect of the suction cup while reducing the pressing force.

[0009] The inner ring of the back plate of the present invention is designed as an approximately planar structure, and the outer ring is designed as an arc surface structure.

[0010] The radius of curvature of the arc structure of the back plate described in this invention is set to R1, where R1 = 12.5mm-50mm.

[0011] The back panel of the present invention further includes a first thickness portion and a second thickness portion. The first thickness portion is located in the middle of the back panel, and the second thickness portion is arranged around the first thickness portion. The thickness of the second thickness portion is greater than the thickness of the first thickness portion.

[0012] The thickness of the second thickness portion of the present invention gradually increases in the direction from the inside to the outside.

[0013] The second thickness portion of the present invention is configured as a stepped structure, and its thickness increases layer by layer in a stepped structure along the direction from the inside to the outside.

[0014] In this invention, the distance projected from the outer side of the second thickness portion to the outer side of the first thickness portion along the adsorption direction is set as A1, where A1 = 2mm - 12mm.

[0015] In this invention, the projected area of ​​the inner ring portion along the adsorption direction is set as D1, and the projected area of ​​the back plate along the adsorption direction is set as L1, where D1 / L1 = 0.034-0.36.

[0016] The colloid of the present invention has a vacuum region and an adsorption region on the adsorption surface, and the adsorption region is arranged around the vacuum region.

[0017] The curvature of the vacuum region in this invention is set as X2, and the curvature of the adsorption region is set as Y2, where X2 > Y2.

[0018] The adsorption region of the present invention is a conical surface, and the conical surface is inclined toward the back plate in the direction from the outside to the inside.

[0019] The angle between the conical surface and the adsorption plane of the suction cup component is set as α, where 5° ≤ α < 10°. Preferably, α = 7° to 9°.

[0020] The vacuum region described in this invention is a recessed portion, preferably a spherical surface.

[0021] The conical surface and the spherical surface described in this invention are provided with rounded corners or chamfers.

[0022] The radius of curvature of the sphere described in this invention is set as R2, where R2 = 15mm - 327mm.

[0023] The diameter of the suction cup component described in this invention is set to D2, and R2 / D2 = 0.95-1.

[0024] The colloid of the present invention has a flat portion and an arcuate portion on the side near the back plate. The flat portion is located in the middle of the colloid, and the arcuate portion is arranged around the flat portion. The spherical surface is arranged opposite to the flat portion and part of the arcuate portion.

[0025] The projected area of ​​the adsorption region along the adsorption direction in this invention is set as A2, and the projected area of ​​the vacuum region along the adsorption direction is set as B1, where B1 / (A2+B1)=0.40-0.45.

[0026] The thickness of the vacuum zone described in this invention gradually increases from the inside to the outside along the radial direction of the suction cup component.

[0027] The thickness of the adsorption zone in this invention gradually decreases from the inside to the outside along the radial direction of the suction cup component.

[0028] The back panel of the present invention is provided with a plurality of protrusions, all of which are provided on the side of the back panel that is tightly bonded to the colloid, and the protrusions are spaced apart around the middle of the back panel, and each of the protrusions is located close to the outer edge of the back panel.

[0029] The outer end of the protrusion in this invention extends to the outer edge of the back plate.

[0030] The adsorption region of the present invention has a contact surface, and the projections of the protrusions toward the contact surface are all located within the contact surface.

[0031] The spacing between adjacent protrusions in this invention is set as D3, where D3 = 1mm-10mm.

[0032] The protrusion of the present invention has a uniform thickness.

[0033] The protrusion of the present invention has a first inclined surface on the outer side of the middle portion and a second inclined surface on the inner side. The first inclined surface is inclined toward the back plate in an inward-outward direction, and the second inclined surface is inclined toward the back plate in an outward-inward direction.

[0034] The maximum height of the protrusion relative to the back plate in this invention is set as H, where H = 1mm-4mm, and the width of the protrusion is set as B2, where B2 = 0.5mm-3mm.

[0035] The width of the protrusion in this invention gradually increases from the inside out.

[0036] The protrusion of the present invention is projected along the adsorption direction, and the extension length of the projection along the outward-inward direction is set as L2, where L2 = 1mm-12mm.

[0037] The protrusions in this invention are spaced at equal intervals.

[0038] The backplate of this invention can have pores, and the projected area of ​​the pores along the adsorption direction is set as K, and the projected area of ​​the colloid along the adsorption direction is set as J, where K:J < 0.2. When K = 0, that is, there are no pores on the surface where the backplate and the colloid are tightly bonded.

[0039] The back plate of the present invention is provided with a plurality of grooves and / or a plurality of protrusions on the side that is tightly bonded to the colloid. Each of the grooves is spaced apart around the middle of the back plate and extends from the inside out.

[0040] The back plate of the present invention is configured in a wave-like shape, undulating up and down along the direction surrounding its central axis.

[0041] The suction cup described in this invention is designed to be disc-shaped.

[0042] The suction cup of the present invention includes a hanging part, which is detachably connected to the connecting part.

[0043] Compared with the prior art, the present invention has the following significant effects:

[0044] (1) The colloid of the present invention is tightly bonded to one side of the back plate, which simplifies the suction cup structure and facilitates processing while maintaining the adsorption effect. The hard back plate can provide support and pressing force for the soft colloid, improving the load-bearing capacity and adsorption capacity of the suction cup. The hard back plate can assist the soft colloid in adsorption, which can improve the adsorption effect. Since Y1>X1, the inner ring of the back plate is set to be relatively flat, while the outer ring is set to be more curved. When the back plate is pressed, force is applied to the middle of the inner ring. The inner ring is easy to deform, which can reduce the amount of force required. At the same time, when the inner ring deforms, it can drive the outer ring to press and adsorb the colloid, and the colloid is better stressed. The adsorption effect of the suction cup can be improved while reducing the pressing force.

[0045] (2) The colloid of the present invention has a vacuum zone and an adsorption zone. The curvature of the vacuum zone is set to be larger, so that after pressing the suction cup, the vacuum zone has a good rebound effect and can generate a continuous vacuum cavity. The curvature of the adsorption zone is smaller and more gentle, so that it can fully fit the wall surface, with a large effective contact area and good load-bearing capacity of the suction cup.

[0046] (3) The adsorption area of ​​the colloid in this invention is set as a cone. When the suction cup is pressed, the cone of the adsorption area has a certain angle with the surface to be installed. Pressing the vacuum area causes it to deform toward the surface to be installed. At the same time, the cone can be flipped to fit with the surface to be installed. By setting a reserved angle in the adsorption area, it is easy for the recessed part to deform, so that the vacuum area can be pressed to expel air, which can fully squeeze out the air and improve the adsorption performance of the suction cup.

[0047] (4) The protrusions spaced apart on the back plate of the present invention can increase the pressure of the outer edge of the back plate on the colloid without affecting the deformation of the back plate, thereby blocking the gas from entering from the edge of the suction cup, which can further improve the adsorption effect of the suction cup, and the adsorption durability can also be improved. In addition, the protrusions can make the colloid more firmly wrapped and bound to the back plate. Attached Figure Description

[0048] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0049] Figure 1 is one of the cross-sectional views of the backplate embodiment 1 of the present invention;

[0050] Figure 2 is one of the three-dimensional structural schematic diagrams of the back plate embodiment 1 in this invention;

[0051] Figure 3 is a second three-dimensional structural schematic diagram of the back plate embodiment 1 in this invention;

[0052] Figure 4 is a second cross-sectional view of embodiment 1 of the back plate in this invention;

[0053] Figure 5 is a schematic diagram of the dimensions of the backplate embodiment 1 in this invention;

[0054] Figure 6 is a structural schematic diagram of Embodiment 3 of the present invention;

[0055] Figure 7 is an exploded view of the structure of Embodiment 4 of the present invention;

[0056] Figure 8 is a cross-sectional view of Embodiment 5 of the present invention;

[0057] Figure 9 is one of the three-dimensional structural schematic diagrams of the colloid in Embodiment 5 of the present invention;

[0058] Figure 10 is a second schematic diagram of the three-dimensional structure of the colloid in Embodiment 5 of the present invention;

[0059] Figure 11 is a cross-sectional view of the colloid in Embodiment 5 of the present invention;

[0060] Figure 12 is one of the schematic diagrams showing the dimensional relationship in Embodiment 5 of the present invention;

[0061] Figure 13 is a second schematic diagram of the dimensional relationship in Embodiment 5 of the present invention;

[0062] Figure 14 is a three-dimensional structural diagram of Embodiment 5 of the present invention (with hanging parts installed);

[0063] Figure 15 is a three-dimensional structural schematic diagram of the backplate embodiment 6 in this invention;

[0064] Figure 16 is a cross-sectional view of embodiment 6 of the back plate in this invention;

[0065] Figure 17 is a three-dimensional structural diagram of the suction cup of the present invention (including the back plate, embodiment 6);

[0066] Figure 18 is an exploded view of the suction cup structure of the present invention (including the back plate, embodiment 6);

[0067] Figure 19 is a three-dimensional structural schematic diagram of the backplate embodiment 7 in this invention;

[0068] Figure 20 is a cross-sectional view of embodiment 7 of the back plate in this invention;

[0069] Figure 21 is a three-dimensional structural schematic diagram of the backplate embodiment 8 in this invention;

[0070] Figure 22 is a cross-sectional view of embodiment 8 of the back plate in this invention;

[0071] Figure 23 is an exploded view of the structure of Embodiment 9 of the present invention. Detailed Implementation

[0072] Example 1

[0073] As shown in Figures 1 to 5, the present invention provides a suction cup with low pressing pressure, comprising a suction cup component 100, which includes a back plate 120 and a colloid 110 (the colloid 110 is shown in Figures 6 and 7). The colloid 110 is tightly bonded to one side of the back plate 120, and a connecting portion 125 is provided on the other side of the back plate 120. The back plate 120 is made of a rigid material, and the colloid 110 is made of a soft material. The back plate 120 includes an inner ring portion 121 and an outer ring portion 122, with the outer ring portion 122 surrounding the inner ring portion 121. The curvature of the inner ring portion 121 is set to X1, and the curvature of the outer ring portion 122 is set to Y1, where Y1 > X1. The colloid 110 is tightly bonded to one side of the back plate 120. The rigid back plate 120 can assist the soft colloid 110 in adsorption, thereby improving the adsorption effect. By setting the inner ring 121 of the back plate 120 to be relatively flat, that is, approximately flat, while the outer ring 122 can be set to be more curved, when the back plate 120 is pressed, force is applied to the middle of the inner ring 121. The inner ring 121 is easy to deform, which can reduce the amount of force required. At the same time, when the inner ring 121 deforms, it can drive the curved structure of the outer ring 122 to press and adsorb the colloid 110 with a smaller deformation. The colloid 110 is better stressed, which can improve the adsorption effect of the suction cup while reducing the pressing force.

[0074] Specifically, the colloid 110 can be tightly bonded to the adsorption side of the back plate 120. This tight bonding can be achieved through adhesive bonding or secondary injection molding. Therefore, the back plate 120 and colloid 110 only require this simple bonding to form a suction cup, resulting in a simple structure without the need for complex assembly components. The other side of the back plate 120 has a connecting portion 125, which can be used to place items or connect hooks, support rods, and other accessories to expand the suction cup's applications. The rigid back plate 120 provides support for the soft colloid 110, improving the suction cup's load-bearing capacity. After being pressed and deformed, the back plate 120 provides a certain compressive force to the colloid 110, thereby enhancing the suction cup's adsorption performance. The inner ring 121 of the back plate 120 has a smaller, gentler curvature, while the outer ring 122 has a larger curvature and a more curved structure, making the back plate 120... The 20 can roughly form a bowl-shaped structure. It is understandable that when the suction cup is pressed, the inner ring 121 will be pressed. The flat structure of the inner ring 121 is easier to deform than the curved and arched structure, thereby reducing the force required to press. After the inner ring 121 is pressed, the outer ring 122 can generate a force towards the colloid 110 under the action of the deformation of the inner ring 121, thereby generating a further pressing force on the colloid 110, thereby improving the adsorption effect of the suction cup. Moreover, after the inner ring 121 is easy to deform, the outer ring 122 is not easy to flip up when pressed.

[0075] In this embodiment, the inner ring portion 121 is designed as an approximately planar structure, and the outer ring portion 122 is designed as an arc surface structure. Specifically, the inner ring portion 121 can be directly designed as an approximately planar structure, which is convenient for manufacturing, and the approximately planar structure is easier to press and has better deformation capability.

[0076] It should be noted that when the colloid 110 is injection molded on the back plate 120 for the second time, pressure is applied to the inner ring portion 121 of the back plate 120, causing the inner ring portion 121 to form a shrinkage zone and to form an approximately planar structure.

[0077] Referring to Figure 4, the back plate 120 also includes a first thickness portion 123 and a second thickness portion 124. The first thickness portion 123 is located in the middle of the back plate 120, and the second thickness portion 124 is arranged around the first thickness portion 123. The thickness of the second thickness portion 124 is greater than the thickness of the first thickness portion 123. Specifically, the thickness of the middle region of the back plate 120 and the thickness of the outer region can be set differently, dividing the back plate 120 into the first thickness portion 123 and the second thickness portion 124. In order to facilitate pressing the back plate 120, the thickness of the first thickness portion 123 in the middle can be set to be smaller, while the thickness of the second thickness portion 124 in the outer ring can be set to be thicker, so as to improve the structural strength and the pressing force on the colloid 110, meet the load-bearing requirements, so that the suction cup can reduce the pressing force while maintaining a certain load-bearing performance.

[0078] The thickness of the second thickness portion 124 gradually increases from the inside out. Specifically, the second thickness portion 124 can gradually thicken along the radial direction of the back plate 120 and from the inside out. By gradually increasing the thickness of the second thickness portion 124, the back plate 120 is less likely to form areas of stress concentration, and the back plate 120 can be subjected to more uniform force when pressed, resulting in more durable adhesion. Furthermore, the structure of being thinner on the inside and thicker on the outside is easier to press and deform. This further improves the adhesion effect of the suction cup while reducing the required pressing force.

[0079] It is conceivable that the second thickness portion 124 can also be configured as a stepped structure, and its thickness can be gradually increased in a stepped structure from the inside to the outside. The specific number of layers is not limited here. The stepped structure can not only meet the above-mentioned technical effects, but also make the colloid 110 and the back plate 120 more firmly bonded.

[0080] Referring to Figure 5, the distance projected along the adsorption direction from the outer side of the second thickness portion 124 to the outer side of the first thickness portion 123 is set as A1, where A1 = 2mm - 12mm. Specifically, the larger the range of the second thickness portion 124, the better the adsorption effect, but the greater the pressing force required, making it inconvenient for the user to press. Through testing, it was found that when A1 is set within the above range, it is both convenient for the user to press and provides a certain adsorption effect, thus meeting the usage requirements.

[0081] The projected area of ​​the inner ring 121 along the adsorption direction is set as D1, and the projected area of ​​the back plate 120 along the adsorption direction is set as L1, where D1 / L1 = 0.034-0.36. It should be noted that Table 1 below shows the test data for a suction cup with a diameter of 55mm:

[0082] (Table 1)

[0083] Specifically, the size of the area between the inner ring 121 and the outer ring 122 affects the required pressing force of the suction cup and its adsorption effect. The smaller the projected area D1 of the inner ring 121 along the adsorption direction, the more arched the overall shape of the back plate 120 becomes, thus requiring a greater pressing force and resulting in a larger negative pressure chamber for venting. Conversely, when D1 is larger, the shape of the back plate 120 is flatter, requiring a smaller pressing force and resulting in a smaller negative pressure chamber for venting. To achieve a balance between pressing force and adsorption effect, referring to Table 1 above, when D1:L1 = 0.034, the suction cup requires a larger pressing force but has a better adsorption effect. When D1:L1 = 0.36, the suction cup requires a very small pressing force, making it easy for the user to press, but the adsorption effect is average. When D1:L1 = 0.105, the suction cup requires a moderate pressing force and has a moderate adsorption effect, making it easy to press and firmly adsorbing, thus meeting the usage requirements.

[0084] The radius of curvature of the curved surface structure is set to R1, where R1 = 12.5mm-50mm. Specifically, the radius of curvature R1 of the curved surface structure affects the pressing pressure and the suction cup's adsorption effect. When the curved surface structure is more curved, i.e., the smaller the radius of curvature R1 is, although the pressing force on the colloid 110 is good, the pressing pressure required by the user is large, making it inconvenient for the user to press. Conversely, when the curved surface structure is more gentle, i.e., the radius of curvature R1 is larger, although the pressing pressure required is small, the suction cup's adsorption effect is poor. Through experiments, when the radius of curvature R1 of the curved surface structure is set to 50mm, the suction cup's adsorption effect is average, but the pressing pressure required is the smallest. When R1 is set to 12.5mm, the pressing pressure required is relatively large, but the suction cup's adsorption effect is good. When R1 is set to 38.9mm, the pressing pressure required is small, and the suction cup's adsorption effect is good, making it both convenient for the user to press and ensuring a firm adsorption.

[0085] Example 2

[0086] The difference between this embodiment and Embodiment 1 is that the back plate has pores. The projected area of ​​the pores along the adsorption direction is set as K, and the projected area of ​​the colloid along the adsorption direction is set as J, where K:J < 0.2. Specifically, the number and shape of the pores are not limited here. By setting pores, the deformation capability of the back plate can be improved, and the required pressing force can be reduced. However, since the other side of the colloid adsorption surface is blocked by the back plate, the back plate can prevent air from penetrating into the negative pressure area of ​​adsorption from the colloid. When the back plate is set with pores, air can penetrate in from the pores. According to the test, when the vacuum degree of the suction cup is -60kPa, when K:J is equal to 0%, 2%, 4%, 6%, 8%, 12%, and 16%, the time required for the vacuum degree of the suction cup to drop by 10kPa is 78 days, 73 days, 64 days, 45 days, 31 days, 24 days, and 22 days, respectively. Therefore, when K:J < 0.2, the adsorption time of the suction cup can meet the usage requirements.

[0087] It is conceivable that the pores can be set to shapes such as strips or circles, and multiple pores can be set, with each pore spaced apart around the middle of the back plate.

[0088] When K=0, there are no pores on the surface where the back plate and the colloid are tightly bonded. At this time, the back plate can completely cover and block the outer surface of the colloid, effectively preventing gas from seeping in, and thus improving the adhesion durability of the suction cup.

[0089] Example 3

[0090] Referring to Figure 6, the difference between this embodiment and Embodiment 1 is that the back plate 120 is undulating in a wave shape along its central axis. Specifically, the radial cross-section of the back plate 120 can undulate up and down around its central axis, thereby forming a roughly wave-like shape. By setting this structure, the back plate 120 can be easily deformed, and the strength of the back plate 120 can be improved through the wave structure, thereby increasing the compressive force on the colloid 110.

[0091] Example 4

[0092] Referring to Figure 7, the difference between this embodiment and Embodiment 1 is that: the side of the back plate 120 that is tightly bonded to the colloid 110 is provided with multiple grooves 130 and / or multiple protrusions 131. When only grooves 130 are provided, each groove 130 is spaced apart around the middle of the back plate 120, and the grooves 130 extend from the inside out. Specifically, the grooves 130 can be configured as strip-shaped grooves extending from the inside out, and each groove 130 can be evenly spaced around the middle of the back plate 120. By providing grooves 130, the back plate 120 can be easily deformed, reducing the pressing force required for the back plate 120, and also facilitating the tight bonding between the colloid 110 and the back plate 120.

[0093] It should be noted that the side of the back plate 120 that is tightly bonded to the adhesive 110 can also be provided with only the protrusion 131. The adhesive 110 can wrap the protrusion 131, increasing the contact area between the adhesive 110 and the back plate 120, making the connection between the adhesive 110 and the back plate 120 more secure. When the suction cup is pressed, the protrusion 131 can act on the adhesive 110, making the adhesive 110 bear the force evenly, thereby improving the pressure on the wall surface.

[0094] It is conceivable that the back plate 120 can also be provided with both grooves 130 and protrusions 131.

[0095] It is conceivable that the groove 130 can also extend to the outer edge of the back plate 120, and the shape of the groove 130 is not limited to the above embodiment, but can also be square, circular or other shapes.

[0096] Referring to Figures 1 to 7, the suction cup component 100 is designed in a disc shape. Specifically, the outer contours of the back plate 120 and the colloid 110 can both be designed as circular, so that the suction cup as a whole is disc-shaped. It is understood that the disc structure has good adsorption performance, and all the above embodiments can be designed as disc-shaped suction cups.

[0097] It should be noted that the backplate 120 is made of plastic, and the colloid 110 is made of elastic material. Specifically, the backplate 120 can be made of plastic, such as PP, PC, PET, etc., which has a certain degree of hardness and elasticity, and can also be injection molded, making it easy to manufacture. The colloid 110 can be made of soft and elastic materials such as silicone and rubber, which have good adsorption effect.

[0098] Example 5

[0099] Referring to Figures 8 to 14, the difference between this embodiment and Embodiment 1 is that the adhesive 110 of the suction cup component 100 has a vacuum zone 111 and an adsorption zone 112 on its adsorption surface. The vacuum zone 111 is a recessed portion, and the adsorption zone 112 surrounds the vacuum zone 111. The curvature of the vacuum zone 111 is set to X2, and the curvature of the adsorption zone 112 is set to Y2, where X2 > Y2. The larger curvature of the vacuum zone 111 results in better rebound after pressing the suction cup, creating a continuous vacuum cavity. The smaller curvature of the adsorption zone 112, being more gentle, allows for better contact with the wall surface, resulting in a larger effective contact area and better load-bearing capacity.

[0100] In actual use, pressing the back plate 120 can drive the vacuum zone 111 to deform and expel air. The vacuum zone 111 with a large curvature has a better rebound effect, thus forming a continuous vacuum cavity. The contact area with a small curvature can fit tightly against the wall, maintaining an effective sealing distance and effective contact area. The suction cup has good load-bearing capacity.

[0101] It should be noted that, through testing, when the suction cup diameter D2 is set to 30mm, X2 can be set to 0.01-0.067, and Y2 can be set to 0.009-0.019. When X2 = 0.034 and Y2 = 0.012, the suction cup component 100 exhibits the best adsorption effect. When the suction cup component 100 diameter D2 is set to 55mm, X2 can be set to 0.006-0.036, and Y2 can be set to 0.003-0.013. When X2 = 0.019 and Y2 = 0.006, the suction cup component 100 exhibits the best adsorption effect. When the suction cup component 100 diameter D2 is set to 100mm, X2 can be set to 0.003-0.02, and Y2 can be set to 0.002-0.006. When X2 = 0.01 and Y2 = 0.004, the suction cup component 100 exhibits the best adsorption effect.

[0102] In this embodiment, the vacuum zone 111 is spherical. Specifically, the surface of the vacuum zone 111 used for adsorption is spherical, and the space between the spherical surface 1111 and the adsorption wall serves as a negative pressure zone for air exhaust. The adsorption zone 112 is in close contact with the wall. By setting the spherical surface 1111 in the vacuum zone 111, it is easier to manufacture the recessed portion, making the recessed area of ​​the vacuum zone 111 larger. On the other hand, the colloid 110 is subjected to uniform force and facilitates air exhaust. Furthermore, after the colloid 110 is pressed and adsorbed, the vacuum zone 111 is more likely to rebound, creating a continuous vacuum cavity, resulting in more reliable adsorption and a longer adsorption time.

[0103] It should be noted that Table 2 below contains test data for several commonly used suction cup specifications (D, B, A, and R in the table header refer to D2, B1, A2, and R2, respectively):

[0104] (Table 2)

[0105] Referring to Figure 8, the projected area of ​​the adsorption zone 112 along the adsorption direction is set as A2, and the projected area of ​​the vacuum zone 111 along the adsorption direction is set as B1, where B1 / (A2+B1)=0.40-0.45. Specifically, before the suction cup 100 is pressed for adsorption, it is placed on the surface to be installed, with the adsorption direction being approximately perpendicular to the surface. The adsorption zone 112 is projected onto the surface to be installed along the adsorption direction, and its projected outline area is set as A2. Similarly, the projected outline area of ​​the vacuum zone 111 is set as B1. As can be seen from the experimental data in Table 2, the ratio of the projected areas of the adsorption zone 112 and the vacuum zone 111 affects the required pressing force, load-bearing capacity, and adsorption durability of the suction cup. When the diameter of the suction cup 100 is fixed, the larger the range of the vacuum zone 111, the larger B1, and the smaller A2. After the vacuum zone 111 is enlarged, the pressing height increases, and the pressing force required by the user is greater. The larger B1 is, the smaller the adsorption area 112 becomes. This reduces the effective contact area between the adsorption area 112 and the surface to be installed, leading to poorer load-bearing capacity, less durable adsorption, difficulty in pressing, and inconvenience for users. Conversely, the smaller B1 is, the larger A2 is. Although the contact area increases and the required pressing force is lower, making pressing easier, the pressing height is very small, and the rebound is small, which is not conducive to the formation of a vacuum cavity. This leads to a decrease in the adsorption durability of the suction cup component 100, which also cannot meet the usage requirements. After testing, when B1 / (A2+B1) is in the range of 0.40-0.45, the required pressing force, load-bearing capacity, and durability of the suction cup are relatively good. For example, when the suction cup diameter is set to 30mm, A2 is set to 3.987cm. 2 B1 is set to 3.077cm. 2 B1 / (A2+B1)=0.44. At this point, the maximum load-bearing capacity of suction cup component 100 is 1.5kg, the load-bearing time is 150 days, and the required pressing force is 80N. All performance aspects are balanced, exhibiting good load-bearing capacity, long-lasting adhesion, and a moderate pressing force, meeting user needs. Furthermore, when the suction cup diameter is set to 30mm, A2 is set to 4.108cm. 2 B1 is set to 2.956cm 2 B1 / (A2+B1)=0.42. At this time, the maximum load capacity of suction cup part 100 is 1.5kg, the load capacity time is 78 days, the required pressing force is 76N, and the performance of all aspects is also good.

[0106] Referring to Figure 12, the radius of curvature of the spherical surface 1111 is set to R2, where R2 = 15mm-327mm. Specifically, the radius of curvature of the spherical surface 1111 affects the size of the negative pressure area at the vacuum zone 111. The smaller the radius of curvature of the spherical surface 1111, the greater the curvature and the greater the degree of concavity. This increases the pressing height of the vacuum zone 111, requiring a greater pressing force. Furthermore, as the vacuum zone 111 increases, the adsorption zone 112 decreases, resulting in a smaller effective contact area and affecting the load-bearing capacity of the suction cup component 100. On the other hand, the larger the radius of curvature of the spherical surface 1111, the flatter the spherical surface 1111, requiring a smaller pressing height. Although the required pressing force is smaller, the resilience of the vacuum zone 111 is poor, which is not conducive to the formation of a vacuum cavity. Consequently, the adsorption durability of the suction cup component 100 is poor. Therefore, after testing, R2 = 15mm-327mm is sufficient to meet the usage requirements.

[0107] The diameter of suction cup 100 is set as D2, and R2 / D2 = 0.95-1. Specifically, referring to Table 2, when B1 / (A2+B1) is within the range of 0.40-0.45, the diameter of suction cup 100 D2 = 30mm, the radius of curvature R2 = 29mm, and R2 / D2 = 0.97. At this time, the maximum load capacity is 1.5kg, the load-bearing time is 150 days, the required pressing force is 80N, the installation pressing force is moderate, the area is moderate, the load-bearing capacity is good, and the durability is good. When the diameter of suction cup 100 D2 = 55mm, the radius of curvature R2 = 53.3mm, and R2 / D2 = 0.97, the maximum load capacity is 5kg, the load-bearing time is 150 days, and the required pressing force is 110N. The installation pressing force is moderate, the area is moderate, the load-bearing capacity is good, and the durability is good. When the suction cup part has a diameter D2 = 100mm, a radius of curvature R2 = 97mm, and R2 / D2 = 0.97, the maximum load capacity is 10kg, the load-bearing time is 150 days, and the required pressing force is 110N. The required pressing force and area are moderate, resulting in good load-bearing capacity and durability. It is evident that when R2 / D2 is within the range of 0.95-1, the required pressing force can be reduced while maintaining good load-bearing capacity and a certain degree of adsorption durability.

[0108] In this embodiment, the colloid 110 has a flat portion 113 and an arcuate portion 114 on the side near the back plate 120. The flat portion 113 is located in the middle of the colloid 110, and the arcuate portion 114 is arranged around the flat portion 11. The spherical surface 1111 is arranged opposite to the flat portion 113 and part of the arcuate portion 114. Specifically, the flat portion 113 corresponds to the inner ring portion 121 of the back plate 120, and the curved portion 114 corresponds to the outer ring portion 122 of the back plate 120. The spherical surface 1111 on the other side of the colloid 110 covers the flat portion 113 and part of the curved portion 114. The inner ring portion 121 of the back plate 120 is easily deformable and can drive the spherical surface 1111 to press towards the wall. In order to exhaust air and deform as much as possible, the spherical surface 1111 needs to be as close to the wall as possible. Therefore, the spherical surface 1111 also needs to deform outward. The outer ring portion 122 corresponding to the curved portion 114 can generate an outward deformation force on the spherical surface 1111. Therefore, the above structure can drive the spherical surface 1111 to deform and exhaust air sufficiently, so that the vacuum zone 111 has good resilience and improves the adsorption effect of the suction cup 100.

[0109] In this embodiment, the adsorption region 112 is set as a conical surface 1121, and the conical surface 1121 is inclined towards the back plate 120 in the outward and inward direction. Specifically, the adsorption area 112 has a conical surface 1121 that adsorbs onto the wall surface. The conical surface 1121 is inclined towards the back plate 120 in the radial direction from the outside to the inside. Before adsorption, the outer ring of the adsorption area 112 abuts against the surface to be installed. The conical surface 1121 of the adsorption area 112 has a certain angle with the surface to be installed. The recessed part and the inwardly inclined conical surface 1121 form a cavity. When pressed, the vacuum area 111 can be pressed. The recessed part deforms towards the surface to be installed, the outer ring of the conical surface 1121 extends outward, and the inner ring of the conical surface 1121 presses against the surface to be installed along with the recessed part. The air in the cavity can be fully squeezed out. By setting a reserved angle in the adsorption area 112, the vacuum area 111 can be fully deformed, which is convenient for exhaust. The conical surface 1121 can fully fit against the wall surface, making it less prone to air leakage. This can increase the effective contact area, improve the adsorption effect of the suction cup, and improve the load-bearing capacity of the suction cup. If the adsorption zone 112 is not provided with a conical surface 1121, but is provided with a plane, when the concave part deforms, the plane will always be against the wall. The resulting cavity volume is small and will hinder the deformation of the concave part, so that the air in the cavity cannot be completely squeezed out, thus failing to form a sufficient pressure difference and resulting in poor adsorption effect.

[0110] Referring to Figures 8 and 13, the angle between the conical surface 1121 of the adsorption zone 112 and the adsorption plane of the suction cup component 100 is set as α, where 5° ≤ α < 10°. Table 3 below shows the test data for suction cup components 100 of various diameters:

[0111] (Table 3)

[0112] Specifically, the size of the angle α of the conical surface 1121 affects the load-bearing performance of the suction cup 100. The smaller the angle α of the conical surface 1121, the smaller the range of rotation of the conical surface 1121. When the suction cup 100 is pressed, when the vacuum zone 111 deforms, the inner ring of the conical surface 1121 will press against the wall, affecting the deformation of the recessed part. The vacuum zone 111 cannot be pressed down, making it difficult to expel air. The required pressing force is large, and the cavity cannot fully squeeze out the air, resulting in a smaller effective contact area with the wall. This leads to low load-bearing performance of the suction cup 100. For example, as shown in Table 3, when the diameter D2 of the suction cup 100 is 30mm, when α = 5°, the load-bearing time of the suction cup 100 in the above test is only 28 days. The adsorption is not durable, the load-bearing effect is poor, and the required pressing force is also large. The larger the angle α of the conical surface 1121, the smaller the thickness of the colloid 110. After pressing, the inner ring of the conical surface 1121 cannot abut against the wall, making it difficult to fully squeeze out the air in the cavity. The effective adsorption area is also smaller, and the load-bearing effect is not ideal. For example, when α = 10°, the load-bearing time of the suction cup 100 in the above test is only 21 days. The adsorption is not lasting, the load-bearing effect is poor, and the required pressing force is also large. Similarly, the test results of suction cups with an outer diameter of 55mm and 100mm are the same. Therefore, the load-bearing performance of the suction cup can meet the usage requirements when 5° ≤ α < 10°.

[0113] When α is set to 7°-9°, the angle of the cone surface 1121 is appropriate, which can facilitate the vacuum zone 111 to press and exhaust air, and can also fully fit the wall surface. According to the test, the load-bearing time and load-bearing performance of the suction cup parts 100 with diameters of 30mm, 55mm and 100mm are excellent within the above range. Therefore, setting α to 7°-9° can be applied to commonly used sizes of suction cup parts 100 and can improve the load-bearing performance of the suction cup parts 100.

[0114] In this embodiment, a rounded corner or chamfer 1131 is provided between the conical surface 1121 and the spherical surface 1111. Specifically, the edges of the conical surface 1121 and the spherical surface 1111 can be chamfered 1131, so that the transition between the spherical surface 1111 and the conical surface 1121 can be relatively smooth. This allows both the spherical surface 1111 and the conical surface 1121 to fully adhere to the wall surface when the suction cup 100 is pressed, further improving the adsorption effect. It can be understood that the spherical surface 1111 and the conical surface 1121 can be transitioned through a rounded corner, which also allows the spherical surface 1111 and the conical surface 1121 to fully adhere to the wall surface after the suction cup 100 is pressed, resulting in a good adsorption effect.

[0115] The projected area of ​​the adsorption zone 112 along the adsorption direction is denoted as A2, and the projected area of ​​the vacuum zone 111 along the adsorption direction is denoted as B1, where A2 / (A2+B1) = 0.55-0.60. Specifically, D4 is the total diameter of the vacuum zone 111 and the adsorption zone 112, and D5 is the diameter of the vacuum zone 111. A2 and B1 can then be calculated. Referring to Table 3, in embodiments with good adsorption effect, when α = 8°, for a suction cup component 100 with a diameter of 30 mm, the actual effective contact area is 3.987 cm². 2 And A2 + B1 = 7.065cm 2 The ratio of the two is 0.564. Similarly, for the suction cup part 100 with a diameter of 55mm, the actual effective contact area is 13.573cm². 2 And A2 + B1 = 23.75cm 2 The ratio of the two is 0.571. For a suction cup component 100 with a diameter of 100 μm, the actual effective contact area is 44.305 cm². 2 And A2 + B1 = 78.5cm 2 The ratio of the two is 0.564. Therefore, when the ratio of the projected area A2 of the adsorption area 112 to the overall projected area (A2+B1) of the colloid 110 is between 0.55 and 0.60, it matches the actual effective contact area, and the adsorption area 112 can fully adhere to the wall surface.

[0116] The thickness of the vacuum zone 111 gradually increases from the inside to the outside along the radial direction of the suction cup 100. Specifically, the gradual increase in thickness from the inside to the outside of the vacuum zone 111 makes it easier to press when the center of the vacuum zone 111 is pressed, requiring less pressing force and expanding the cavity between the spherical surface 1111 and the wall, thus improving the rebound effect of the vacuum zone 111. The thickness of the adsorption zone 112 gradually decreases from the inside to the outside along the radial direction of the suction cup 100. Specifically, before the suction cup 100 adsorbs, the outer ring of the adsorption zone 112 abuts against the wall. By gradually reducing the thickness of the outer ring of the adsorption zone 112, the adsorption zone 112 can easily open and deform when the suction cup 100 is pressed, allowing the colloid 110 to fully contact the wall, thereby improving the load-bearing capacity.

[0117] Referring to Figure 14, the suction cup also includes a hanging part 200, which can be detachably connected to the connecting part 125. The hanging part 200 can be provided with a connecting component that matches the connecting part 125, so that the hanging part 200 can be connected to the suction cup 100 that has been adsorbed through the connecting part 125. The hanging part 200 can be used to hang objects, and the user can also first install the hanging part 200 on the connecting part 125 of the back plate 120, and then press the hanging part 200 to drive the suction cup 100 to adsorb.

[0118] Example 6

[0119] Referring to Figures 15 to 18, the difference between this embodiment and Embodiment 1 is that: the back plate 120 is provided with a plurality of protrusions 126, all of which are provided on the side of the back plate 120 that is tightly bonded to the colloid 110, and the protrusions 126 are spaced around the middle of the back plate 120, and each protrusion 126 is provided close to the outer edge of the back plate 120, and the middle of the back plate 120 is a closed surface 129. The rigid backplate 120 assists the soft colloid 110 in adsorption, resulting in good adsorption. The spaced protrusions 126 enhance the effective pressing force of the backplate 120 on the outer edge of the colloid 110 without affecting the deformation of the backplate 120, thereby preventing gas from entering from the edge of the suction cup. When the backplate 120 is pressed, the force applied to the backplate 120 is directly transmitted to the protrusions 126, allowing the protrusions 126 to fully act on the colloid 110, thus enabling the colloid 110 to fully adhere to the wall surface and form an effective adhesion surface. This prevents gas from easily entering from the edge and improves the load-bearing capacity of the suction cup. Furthermore, the protrusions 126 also make the colloid 110 more firmly wrapped and bonded to the backplate 120.

[0120] The specific shape of the protrusion 126 is not limited here. Multiple protrusions 126 can be provided, and the protrusions 126 can be arranged more densely without affecting the deformation of the back plate 120. Each protrusion 126 can be located near the outer edge of the back plate 120, so that the edge of the suction cup can be reinforced and sealed, and gas can be blocked from entering the negative pressure chamber from the outer edge. In addition, the protrusion 126 can also be more firmly connected to the colloid 110.

[0121] The outer end of the protrusion 126 extends to the outer edge of the back plate 120. Specifically, after the protrusion 126 extends to the outer edge, it can further enhance the pressing force of the edge on the colloid 110, expand the pressing range, and further improve the adsorption durability of the suction cup.

[0122] It is conceivable that the protrusion 126 can also extend to the outer edge of the back plate 120, so that the protrusion 126 can extend to the outer edge of the protruding colloid 110. After adsorption, the protrusion 126 can also protect the colloid 110 to prevent external forces from hitting the side of the colloid 110, causing it to lift up and leak air.

[0123] Referring to Figures 17 and 18, the colloid 110 has a vacuum zone 111 in the center, and an adsorption zone 112 is provided around the vacuum zone 111. The adsorption zone 112 has a contact surface, and the projections of the protrusions 126 toward the contact surface are all located within the contact surface. Specifically, the side of the vacuum zone 111 used for adsorption has a depression, which can form a negative pressure cavity for compression with the wall surface. The adsorption zone 112 can abut against the wall surface. The adsorption zone 112 can expand the effective adsorption surface and improve the adsorption effect. The protrusions 126 are all provided on the side of the back plate 120 opposite to the adsorption zone 112, so as not to affect the compression of the vacuum zone 111. This allows the vacuum zone 111 to fully squeeze out the air and also reduces the pressure required for pressing, making it easier for the user to press.

[0124] The spacing between adjacent protrusions 126 is set as D3, where D3 = 1mm-10mm. Specifically, the density of the protrusions 126 affects the deformation of the back plate 120 and the pressing force on the colloid 110. When the spacing is very small or very large, the pressing force that the back plate 120 can exert on the colloid 110 after being pressed is reduced. Through experiments, it has been found that within the range of D3 = 1mm-10mm, it is convenient for the back plate 120 to deform under pressure while providing sufficient pressing force.

[0125] In this embodiment, the thickness of the protrusion 126 is uniform. Specifically, the protrusion 126 can be configured as a uniformly raised square strip, which allows the colloid 110 to be subjected to relatively uniform force after pressing, and facilitates the injection molding of the back plate 120, thus simplifying production. It is conceivable that the protrusion 126 can also be trapezoidal, elliptical, or irregular in shape, and the specific shape is not limited.

[0126] Example 7

[0127] Referring to Figures 19 and 20, the difference between this embodiment and Embodiment 6 is that the outer side of the protrusion 126 has a first inclined surface 127, and the inner side has a second inclined surface 128. The first inclined surface 127 is inclined towards the back plate 120 in an inward-outward direction, and the second inclined surface 128 is inclined towards the back plate 120 in an outward-inward direction. Specifically, the first inclined surface 127 on the outer side of the protrusion 126 can extend to the outer edge of the back plate 120. The shape of the protrusion 126 in the middle is defined by the first inclined surface 127 and the second inclined surface 128, which can increase the maximum height of the protrusion 126 without affecting the deformation of the back plate 120, thereby further increasing the pressing force on the colloid 110 and further improving the adsorption effect of the suction cup.

[0128] It is conceivable that, before adsorption, the first inclined surface 127 can be roughly parallel to the surface to be adsorbed, thereby increasing the area of ​​the coating.

[0129] It should be noted that the shape of the protrusion 126 is not limited to the above embodiment, and may also have other embodiments. For example, multiple protrusions 126 may be arranged along the radial direction of the back plate 120 and spaced apart from the inside to the outside, and the height of each protrusion 126 may also increase from the inside to the outside.

[0130] The maximum height of the protrusion 126 relative to the back plate 120 is set to H, where H = 1mm-4mm, and the width of the protrusion 126 is set to B2, where B2 = 0.5mm-3mm. Specifically, if the protrusion height of the protrusion 126 is too high, it will affect the extrusion and exhaust; if it is too small, it will not be able to strengthen the pressing effect. Through experiments, it was found that when the maximum height H of the protrusion 126 is set between 1mm and 4mm, it can facilitate the suction cup extrusion and exhaust while strengthening the pressing effect on the edge of the colloid 110. A pressing effect is better when the width B2 of the protrusion 126 is set within the range of 0.5mm-3mm.

[0131] Example 8

[0132] Referring to Figures 21 and 22, the difference between this embodiment and Embodiment 6 is that the width of the protrusion 126 gradually increases from the inside out. Specifically, the back plate 120 can be injection molded, and the two sides of the protrusion 126 can be inclined from the inside out, thereby gradually increasing the width of the protrusion 126. On the one hand, this allows the protrusion 126 to gradually expand outward, increasing the pressing force of the outer edge without affecting the deformation of the back plate 120. On the other hand, this structure facilitates the flow of adhesive to the protrusion 126, resulting in better injection molding.

[0133] The protrusion 126 is projected along the adsorption direction, and the extension length of the projection along the outward-inward direction is set as L2, where L2 = 1mm-12mm. Specifically, the range of the protrusion 126 affects the deformation of the back plate 120 and the compressive force on the colloid 110. Through experiments, it has been found that within the range of L2 = 1mm-12mm, it is convenient for the back plate 120 to deform and can also provide a certain compressive force on the colloid 110.

[0134] In this embodiment, the protrusions 126 are spaced at equal intervals. The uniform arrangement of the protrusions 126 allows the back plate 120 to undergo uniform topographic deformation when pressed, and the colloid 110 to be subjected to uniform force, resulting in good adsorption effect.

[0135] Example 9

[0136] Referring to Figure 23, the difference between this embodiment and Embodiment 6 is that the side of the back plate 120 that is tightly bonded to the colloid 110 is provided with multiple grooves 130 and / or multiple protrusions 131. When the grooves 130 are provided, each groove 130 is spaced around the middle of the back plate 120 and extends from the inside out. Specifically, the grooves 130 can be set as strip-shaped grooves extending from the inside out, and each groove 130 can be evenly spaced around the middle of the back plate 120. By providing the grooves 130, the back plate 120 can be easily deformed, the pressing force required for the back plate 120 can be reduced, and the tight bonding between the colloid 110 and the back plate 120 can be facilitated.

[0137] It should be noted that the side of the back plate 120 that is tightly bonded to the adhesive 110 can also be provided with only the protrusion 131. The adhesive 110 can wrap the protrusion 131, which can increase the contact area between the adhesive 110 and the back plate 120, making the connection between the adhesive 110 and the back plate 120 more secure. When the suction cup is pressed, the protrusion 131 can act on the adhesive 110, making the adhesive 110 bear the force evenly, thereby improving the pressing force on the wall.

[0138] It is conceivable that the back plate 120 can also be provided with both grooves 130 and protrusions 131.

Claims

1. A suction cup requiring low pressing force, characterized in that: The device includes a suction cup component (100), which includes a back plate (120) and an adhesive (110). The adhesive (110) is tightly bonded to one side of the back plate (120), and the other side of the back plate (120) is provided with a connecting part (125). The back plate (120) is made of a hard material, and the adhesive (110) is made of a soft material. The back plate (120) includes an inner ring (121) and an outer ring (122). The outer ring (122) is arranged around the inner ring (121). The curvature of the inner ring (121) is set as X1, and the curvature of the outer ring (122) is set as Y1, where Y1 > X1.

2. The suction cup with low pressing force according to claim 1, characterized in that: The inner ring (121) of the back plate (120) is designed as an approximately planar structure, and the outer ring (122) is designed as an arc surface structure.

3. The suction cup with low pressing force according to claim 2, characterized in that: The radius of curvature of the arc structure of the back plate (120) is set to R1, where R1 = 12.5mm-50mm.

4. The suction cup with low pressing force according to any one of claims 1 to 3, characterized in that: The back plate (120) further includes a first thickness portion (123) and a second thickness portion (124). The first thickness portion (123) is located in the middle of the back plate (120), and the second thickness portion (124) is arranged around the first thickness portion (123). The thickness of the second thickness portion (124) is greater than the thickness of the first thickness portion (123).

5. The suction cup with low pressing force according to claim 4, characterized in that: The thickness of the second thickness portion (124) gradually increases in the direction from the inside to the outside.

6. The suction cup with low pressing force according to claim 4, characterized in that: The second thickness portion (124) is configured as a stepped structure, and its thickness increases layer by layer in a stepped structure along the direction from the inside to the outside.

7. The suction cup with low pressing force according to any one of claims 4 to 6, characterized in that: The distance projected along the adsorption direction from the outer side of the second thickness portion (124) to the outer side of the first thickness portion (123) is set as A1, where A1 = 2mm - 12mm.

8. The suction cup with low pressing force according to any one of claims 1 to 7, characterized in that: The projected area of ​​the inner ring (121) along the adsorption direction is set as D1, and the projected area of ​​the back plate (120) along the adsorption direction is set as L1, where D1 / L1 = 0.034-0.

36.

9. The suction cup with low pressing force according to any one of claims 1 to 8, characterized in that: The colloid (110) has a vacuum region (111) and an adsorption region (112) on the adsorption surface, and the adsorption region (112) is arranged around the vacuum region (111).

10. The suction cup with low pressing force according to claim 9, characterized in that: The curvature of the vacuum region (111) is set to X2, and the curvature of the adsorption region (112) is set to Y2, where X2 > Y2.

11. The suction cup with low pressing force according to claim 9 or 10, characterized in that: The adsorption area (112) is a conical surface (1121), and the conical surface (1121) is inclined toward the back plate (120) in the direction from the outside to the inside.

12. The suction cup with low pressing force according to claim 11, characterized in that: The angle between the conical surface (1121) and the adsorption plane of the suction cup (100) is set as α, where 5°≤α<10°.

13. The suction cup with low pressing force according to claim 12, characterized in that: α＝7°～9°。 14. The suction cup with low pressing force according to any one of claims 9 to 13, characterized in that: The vacuum region (111) is a recessed area.

15. The suction cup with low pressing force according to claim 14, characterized in that: The recessed portion is spherical (1111).

16. The suction cup with low pressing force according to claim 15, characterized in that: A rounded corner or chamfer (1131) is provided between the conical surface (1121) and the spherical surface (1111).

17. The suction cup with low pressing force according to claim 15 or 16, characterized in that: The radius of curvature of the sphere (1111) is set to R2, where R2 = 15mm - 327mm.

18. The suction cup with low pressing force according to claim 17, characterized in that: The diameter of the suction cup component (100) is set to D2, and R2 / D2 = 0.95-1.

19. The suction cup with low pressing force according to any one of claims 15 to 18, characterized in that: The colloid (110) has a flat portion (113) and an arcuate portion (114) on the side near the back plate (120). The flat portion (113) is located in the middle of the colloid (110), and the arcuate portion (114) is arranged around the flat portion (113). The spherical surface (1111) is arranged opposite to the flat portion (113) and part of the arcuate portion (114).

20. The suction cup with low pressing force according to any one of claims 9 to 19, characterized in that: The projected area of ​​the adsorption region (112) along the adsorption direction is set as A2, and the projected area of ​​the vacuum region (111) along the adsorption direction is set as B1, B1 / (A2+B1)=0.40-0.

45.

21. The suction cup with low pressing force according to any one of claims 9 to 20, characterized in that: The thickness of the vacuum zone (111) gradually increases from the inside to the outside along the radial direction of the suction cup (100).

22. The suction cup with low pressing force according to any one of claims 9 to 21, characterized in that: The thickness of the adsorption zone (112) gradually decreases from the inside to the outside along the radial direction of the suction cup (100).

23. The suction cup with low pressing force according to any one of claims 1 to 22, characterized in that: The back plate (120) is provided with a plurality of protrusions (126), each of which is located on the side of the back plate (120) that is tightly bonded to the colloid (110). The protrusions (126) are spaced around the middle of the back plate (120), and each of the protrusions (126) is located near the outer edge of the back plate (120).

24. The suction cup with low pressing force according to claim 23, characterized in that: The outer end of the protrusion (126) extends to the outer edge of the back plate (120).

25. The suction cup with low pressing force according to claim 23 or 24, characterized in that: The adsorption area (112) has a contact surface, and the projection of the protrusion (126) toward the contact surface is located within the contact surface.

26. The suction cup with low pressing force according to any one of claims 23 to 25, characterized in that: The spacing between adjacent protrusions (126) is set as D3, where D3 = 1mm - 10mm.

27. The suction cup with low pressing force according to any one of claims 23 to 26, characterized in that: The thickness of the protrusion (126) is uniform.

28. The suction cup with low pressing force according to any one of claims 23 to 27, characterized in that: The protrusion (126) has a first inclined surface (127) on the outer side of the middle part and a second inclined surface (128) on the inner side. The first inclined surface (127) is inclined toward the back plate (120) in the direction from inside to outside, and the second inclined surface (128) is inclined toward the back plate (120) in the direction from outside to inside.

29. The suction cup with low pressing force according to any one of claims 23 to 28, characterized in that: The maximum height of the protrusion (126) relative to the back plate (120) is set to H, where H = 1mm-4mm, and the width of the protrusion (126) is set to B2, where B2 = 0.5mm-3mm.

30. The suction cup with low pressing force according to any one of claims 23 to 29, characterized in that: The width of the protrusion (126) gradually increases from the inside out.

31. The suction cup with low pressing force according to any one of claims 23 to 30, characterized in that: The protrusion (126) is projected along the adsorption direction, and the extension length of the projection along the outward-inward direction is set as L2, where L2 = 1mm-12mm.

32. The suction cup with low pressing force according to any one of claims 23 to 31, characterized in that: The protrusions (126) are spaced at equal intervals.

33. The suction cup with low pressing force according to any one of claims 1 to 32, characterized in that: The back plate (120) can have pores, the projected area of ​​the pores along the adsorption direction is set as K, and the projected area of ​​the colloid (110) along the adsorption direction is set as J, where K:J < 0.

2.

34. The suction cup with low pressing force according to claim 33, characterized in that: K＝0。 35. The suction cup with low pressing force according to any one of claims 1 to 34, characterized in that: The back plate (120) is tightly bonded to the colloid (110) and has a plurality of grooves (130) and / or a plurality of protrusions (131) on one side. Each groove (130) is spaced around the middle of the back plate (120) and extends from the inside to the outside.

36. The suction cup with low pressing force according to any one of claims 1 to 35, characterized in that: The back plate (120) is arranged in a wave-like shape, undulating up and down along its central axis.

37. The suction cup with low pressing force according to any one of claims 1 to 36, characterized in that: The suction cup is designed to be disc-shaped.

38. The suction cup with low pressing force according to any one of claims 1 to 37, characterized in that: The suction cup includes a hanging part (200), which is detachably connected to the connecting part (125).

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