Air exhaust type diaphragm one-way suction cup
By designing a unidirectional suction cup with a unidirectional diaphragm and a pressure-retaining spring structure, the negative pressure pumping and pressure-retaining effect is solved, and the traditional suction cups are poor stability and insufficient aesthetics are suitable for fixing items such as storage racks.
Patent Information
- Application Number
- CN202422224247.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-10
AI Technical Summary
Traditional suction cups have poor stability when fixed, especially when squeezing suction cups, and the existing suction cup structure with air extraction function is not conducive to improving aesthetics and is difficult to apply on the base of items such as storage racks.
A pumping diaphragm unidirectional suction cup is designed. By setting a bowl-shaped plate mouth, a one-way diaphragm and a pressure-retaining spring structure at the bottom of the disc body, the negative pressure-retaining effect is achieved. Combined with the radial and circumferential air guide grooves, the air tightness and stability are improved. The pressing member is designed in the same direction as the axis of the disc body to ensure structural compactness.
It realizes stable and reliable fixing of the suction cup, improves the fitting effect and support strength, ensures the sustainability and aesthetics of negative pressure, and facilitates the assembly with items such as storage racks.
Smart Images
Figure CN223120392U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of suction cups, in particular to an air-extracting diaphragm one-way suction cup. Background Art
[0002] The suction cup realizes fixation on the surface of an adsorbed object through adsorption, and is widely used as a core fixing component for fixing various articles; when the traditional suction cup is fixed, the suction cup is extruded to discharge the air in the orifice of the suction cup to generate negative pressure, so as to realize fixation on the surface of the adsorbed object. However, this fixing method has poor stability. Especially when the suction cup is extruded, problems such as incomplete discharge of the air in the orifice are likely to occur, resulting in the vacuum degree in the orifice not meeting the fixing requirements; in view of this problem, suction cups with an air-extracting function have been designed on the market. The air in the orifice of the suction cup is discharged by an air-extracting method to improve the vacuum degree in the orifice. However, it is generally radial air extraction, and its structure is not conducive to improving the overall aesthetics, and it is difficult to apply it to the base of articles such as a storage rack. Content of the Utility Model
[0003] Based on the above problems, the purpose of the utility model is to provide an air-extracting diaphragm one-way suction cup that is suitable for adsorption and fixation of various storage racks and has a stable and reliable structure.
[0004] In view of the above problems, the following technical solution is provided: an air-extracting diaphragm one-way suction cup, including a disk body, a disk orifice is arranged at the bottom of the disk body, the disk orifice is concave in a bowl shape and the wall thickness near the outer edge gradually thins, an installation part is arranged at the top of the disk body, and an exhaust passage communicating with the inner cavity of the disk orifice is arranged in the central area of the installation part. A one-way diaphragm covering the outside of the orifice of the exhaust passage is arranged in the central area of the installation part; an air chamber and a disk cover are further arranged at the top of the disk body. One end of the air chamber faces the one-way diaphragm. A one-way piston is arranged in the air chamber. One end of the one-way piston facing away from the one-way diaphragm is connected with a pressing member extending out of the disk cover. A pressure-holding spring for pushing the one-way piston to move towards the top of the disk cover to make the pressing member protrude is further arranged in the air chamber; when the pressure-holding spring pushes the one-way piston to move towards the top of the disk cover, a negative pressure is formed between the one-way piston and the one-way diaphragm, so that the air in the disk orifice is extracted through the exhaust passage; when the pressing member is pressed, the one-way piston approaches the one-way diaphragm and compresses the pressure-holding spring. At the same time, the pressure in the inner cavity of the air chamber between the one-way diaphragm and the one-way piston increases, so that the one-way diaphragm fits with the exhaust passage, forcing the air between the one-way piston and the one-way diaphragm to be discharged through the gap between the one-way piston and the air chamber.
[0005] In the above structure, the wall thickness at the outer edge of the socket gradually thins out, which can improve the fitting effect at the outer edge. At the same time, the support strength can be gradually increased at positions far from the outer edge to ensure the stability of the suction cup. When evacuating air, press the pressing member reciprocally. When pressing down, the pressure-holding spring compresses, the one-way piston approaches the one-way diaphragm, and the pressure at the rear end of the air chamber (i.e., the pressure between the one-way piston and the one-way diaphragm is greater than the pressure inside the socket). At this time, the one-way diaphragm fits and closes the exhaust passage, and the excess air is discharged from the gap between the one-way piston and the air chamber. When releasing the hand, the pressure-holding spring pushes the one-way piston away from the one-way diaphragm. At this time, the pressure at the rear end of the air chamber (i.e., the pressure between the one-way piston and the one-way diaphragm is less than the pressure inside the socket). At this time, the air inside the socket pushes open the one-way diaphragm and enters the air chamber to prepare for exhausting air for the next pressing. In this way, the evacuation action is realized reciprocally. The sealing lip of the one-way piston is trumpet-shaped, and its lip opening faces away from the one-way diaphragm, so the purpose of one-way air extraction is achieved. When the air inside the socket is gradually exhausted, affected by the negative pressure, the one-way piston will resist the elastic force of the pressure-holding spring to limit the ejection of the pressing member, thus realizing the negative pressure pressure-holding effect. Since the pressing direction of the pressing member is the same as the axis of the disk body, the compactness of the structure is effectively guaranteed, and at the same time, it is beneficial to design the shape of the storage rack when assembling with the storage rack.
[0006] The present utility model is further arranged such that the one-way diaphragm is circular, and a C-shaped notch is provided in the central region thereof. The C-shaped notch makes a lobe formed at the center of the one-way diaphragm fit or separate from the opening of the exhaust passage. The end face of the air chamber abuts against the outer edge of the one-way diaphragm for sealing; or the one-way diaphragm is circular, and a fixing post is provided in the central region thereof to form an umbrella-shaped portion at the outer edge of the one-way diaphragm. A fixing hole for inserting the fixing post is provided at the top of the disk body. The opening of the exhaust passage and the fixing hole are offset. The umbrella-shaped portion fits or separates from the opening of the exhaust passage.
[0007] In the above structure, the C-shaped notch provides a moving space for the lobe; the inner and outer diameters of the end of the fixing post away from the one-way diaphragm increase, so as to achieve the anti-detachment effect when in interference fit with the fixing hole. The thickness of the outer edge of the umbrella-shaped portion is less than the thickness at the position close to the fixing post, which is beneficial to improving the moving sensitivity of the umbrella-shaped portion.
[0008] The present utility model is further arranged such that a plurality of radial air guide grooves are provided on the inner wall of the socket, which are radially opened from the center of the socket towards the position close to the outer edge of the socket; a circumferential air guide groove concentric with the center of the socket is further provided on the inner wall of the socket, which is circumferentially opened and connected to each radial air guide groove. When there are multiple circumferential air guide grooves, they are offset from each other; the exhaust passage is connected to the radial air guide groove and / or the circumferential air guide groove.
[0009] In the above structure, the radial air guide grooves and the circumferential air guide grooves can guide the air on the inner wall of the socket and discharge it from the exhaust passage, avoiding the formation of local air cavities between the inner wall of the socket and the surface of the adsorbed object to cause air entrapment, and improving the exhausting effect.
[0010] The present utility model is further configured such that a sealing ring is provided on a surface of the outer edge of the disk opening facing away from the top of the disk body, and when there are multiple sealing rings, they are offset from each other.
[0011] In the above structure, the airtightness with the surface of the object to be adsorbed is improved.
[0012] The present utility model is further configured such that pull ears are provided at the side wall position of the outer edge of the disk opening.
[0013] In the above structure, after adsorption, the outer edge of the disk opening can be lifted through the pull ears to allow air to enter the disk opening, thereby removing the suction cup.
[0014] The present utility model is further configured such that the disk body further has a pressure relief hole provided inside the disk opening and penetrating through its bottom and top; or a plug hole with an inner diameter larger than that of the pressure relief hole is provided at one end of the pressure relief hole facing the disk opening; one end of the pressure relief hole facing the inside of the disk opening is opened through a radial air guide groove and / or a circumferential air guide groove.
[0015] In the above structure, the connection between the pressure relief hole and the radial air guide groove and / or the circumferential air guide groove is beneficial to quickly distribute air to the entire disk opening, avoiding difficulty in removing the suction cup due to the existence of local negative pressure parts between the inner wall of the disk opening and the surface of the object to be adsorbed.
[0016] The present utility model is further configured such that when a plug hole is provided at one end of the pressure relief hole facing the disk opening, a pressure relief rod is provided in the pressure relief hole, a plug head adapted to the plug hole is provided at one end of the pressure relief rod facing the disk opening, a pressure relief button is provided at the other end of the pressure relief rod and passes through and exposes outside the disk cover, and a pressure relief spring for pushing the pressure relief rod to expose the pressure relief button while making the plug head abut against the end face at the junction of the pressure relief hole and the plug hole to achieve sealing is sleeved on the pressure relief rod.
[0017] In the above structure, one end of the pressure relief spring abuts against the pressure relief button, and the other end abuts against the supporting part outside the air chamber (the pressure maintaining spring abuts against the end face of the necking at the end of the air chamber), and the plug head abuts against the end face at the junction of the pressure relief hole and the plug hole under the elastic force of the pressure relief spring to achieve sealing. When it is necessary to remove the suction cup, just press the pressure relief button to make the plug head disengage to allow air to enter the disk opening.
[0018] The present utility model is further configured such that the installation part is an installation bracket located at the top of the disk body and embedded in the disk body, and installation holes are provided on the installation bracket; the air chamber and the disk cover are connected to the installation bracket by screws.
[0019] In the above structure, the installation bracket is made of plastic or metal, and the installation bracket is integrally embedded directly when the disk body is injected with glue or injection molded; embedded nuts are provided in the installation holes, the screws are connected to the embedded nuts, and the disk cover presses the air chamber onto the disk body when fixed; the screws can also pass through other parts to be fixed and fix them to the suction cup.
[0020] The utility model is further configured such that a warning ring is provided on the outer side wall of the pressing member.
[0021] In the above structure, the warning ring is located at the middle position of the pressing stroke of the pressing member and is used to indicate the negative pressure state inside the socket. If the warning ring is exposed, it means that the socket needs to be evacuated again.
[0022] The utility model is further configured such that a support cover is provided at one end of the socket cover facing the socket. When the socket adsorbs, the end face of the support cover abuts against the outer edge of the back end of the socket body facing away from the socket or is located outside the socket and abuts against the surface of the adsorbed object.
[0023] In the above structure, when the socket adsorbs the surface of the adsorbed object, its outer diameter will expand. At the same time, the height of the socket body decreases, causing the support cover to abut against the outer edge of the socket to enhance the adsorption force and stability; or directly abut against the surface of the adsorbed object. When the support cover directly abuts against the surface of the adsorbed object, an ear groove for the pull tab to pass through is provided on the end face of the support cover.
[0024] The beneficial effects of the utility model are as follows: The wall thickness near the outer edge of the socket gradually decreases, which can improve the fitting effect at the outer edge, and at the same time, the support strength can be gradually increased at a position far from the outer edge to ensure the stability of the suction cup; When evacuating, press the pressing member reciprocally. When pressing down, the pressure maintaining spring is compressed, the one-way piston approaches the one-way diaphragm, and the pressure at the rear end of the air chamber (that is, the pressure between the one-way piston and the one-way diaphragm is greater than the pressure inside the socket), at this time, the one-way diaphragm fits with the exhaust passage to close the exhaust passage, and the excess air is discharged from the gap between the one-way piston and the air chamber; When releasing the hand, the pressure maintaining spring pushes the one-way piston away from the one-way diaphragm. At this time, the pressure at the rear end of the air chamber (that is, the pressure between the one-way piston and the one-way diaphragm is less than the pressure inside the socket), at this time, the air inside the socket pushes open the one-way diaphragm and enters the air chamber to prepare for exhausting in the next pressing. In this way, the evacuation action is realized reciprocally; The sealing lip of the one-way piston is in a trumpet shape, and its lip opening faces away from the one-way diaphragm, so the purpose of one-way evacuation is achieved; When the air inside the socket is gradually exhausted, affected by the negative pressure, the one-way piston will resist the elastic force of the pressure maintaining spring to limit the ejection of the pressing member, thereby achieving the negative pressure pressure maintaining effect; Since the pressing direction of the pressing member is the same as the axis of the socket body, the compactness of the structure is effectively guaranteed, and at the same time, it is beneficial to design the shape of the storage rack when assembling with the storage rack. Description of the Drawings
[0025] Figure 1 It is a schematic three-dimensional structure diagram of the whole of the utility model.
[0026] Figure 2 It is an exploded structure diagram of the utility model.
[0027] Figure 3 It is a schematic three-dimensional exploded structure diagram of the first perspective of the socket body with the one-way diaphragm of the utility model in a fixed column structure.
[0028] Figure 4 This is a second perspective exploded three-dimensional structural schematic diagram of the disc with a unidirectional diaphragm of a fixed column structure according to the present utility model.
[0029] Figure 5 This is a first full-section three-dimensional structural schematic diagram of the disc with a unidirectional diaphragm of a fixed column structure according to the present utility model.
[0030] Figure 6 This is a second full-section three-dimensional structural schematic diagram of the disc with a unidirectional diaphragm of a fixed column structure according to the present utility model.
[0031] Figure 7 This is a first perspective exploded three-dimensional structural schematic diagram of the disc with a unidirectional diaphragm of a C-shaped notch structure according to the present utility model.
[0032] Figure 8 This is a second perspective exploded three-dimensional structural schematic diagram of the disc with a unidirectional diaphragm of a C-shaped notch structure according to the present utility model.
[0033] Figure 9 This is a first full-section three-dimensional structural schematic diagram of the disc with a unidirectional diaphragm of a C-shaped notch structure according to the present utility model.
[0034] Figure 10 This is a second full-section three-dimensional structural schematic diagram of the disc with a unidirectional diaphragm of a C-shaped notch structure according to the present utility model.
[0035] The meanings of the reference numerals in the figure: 10 - disc; 101 - fixing hole; 11 - disc opening; 111 - radial air guide groove; 112 - circumferential air guide groove; 113 - sealing ring; 114 - pulling ear; 12 - mounting part; 13 - exhaust passage; 14 - unidirectional diaphragm; 141 - C-shaped notch; 142 - die flap; 143 - fixing column; 144 - umbrella-shaped part; 15 - mounting bracket; 151 - mounting hole; 152 - embedded nut; 16 - screw; 17 - pressure relief hole; 171 - plug hole; 20 - air chamber; 201 - supporting part; 202 - closing; 21 - unidirectional piston; 211 - sealing lip; 22 - pressing member; 221 - warning ring; 23 - pressure maintaining spring; 30 - disc cover; 31 - supporting cover; 311 - ear groove; 40 - pressure relief rod; 401 - plugging head; 41 - pressure relief button; 42 - pressure relief spring. Detailed implementation manners
[0036] The following further describes in detail the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.
[0037] Reference Figures 1 to 10 As Figures 1 to 10A kind of air extraction diaphragm one-way suction cup shown in the figure includes a disk body 10. A disk opening 11 is provided at the bottom of the disk body 10. The disk opening 11 is concave in a bowl shape and the wall thickness near the outer edge gradually thins. An installation part 12 and an exhaust passage 13 that is communicated with the inner cavity of the disk opening 11 in the central area of the installation part 12 are provided at the top of the disk body 10. A one-way diaphragm 14 covering the outside of the opening of the exhaust passage 13 is provided in the central area of the installation part 12; it also includes an air chamber 20 and a disk cover 30 located at the top of the disk body 10. One end of the air chamber 20 faces the one-way diaphragm 14. A one-way piston 21 is provided in the air chamber 20. One end of the one-way piston 21 facing away from the one-way diaphragm 14 is connected with a pressing member 22 that extends out of the disk cover 30. A pressure maintaining spring 23 for pushing the one-way piston 21 to move towards the top of the disk cover 30 to make the pressing member 22 protrude is also provided in the air chamber 20; when the pressure maintaining spring 23 pushes the one-way piston 21 to move towards the top of the disk cover 30, a negative pressure is formed between the one-way piston 21 and the one-way diaphragm 14, so that the air in the disk opening 11 is extracted through the exhaust passage 13; when the pressing member 22 is pressed, the one-way piston 21 approaches the one-way diaphragm 14 and compresses the pressure maintaining spring 23. At the same time, the pressure in the inner cavity of the air chamber 20 between the one-way diaphragm 14 and the one-way piston 21 increases, so that the one-way diaphragm 14 fits with the exhaust passage 13, forcing the air between the one-way piston 21 and the one-way diaphragm 14 to be discharged through the gap between the one-way piston 21 and the air chamber 20.
[0038] In the above structure, the gradually thinning wall thickness near the outer edge of the disk opening 11 can improve the fitting effect at the outer edge, and at the same time can gradually increase the support strength at the position far from the outer edge to ensure the stability of the suction cup; when the pressing member 22 is reciprocally pressed during air extraction, when it is pressed down, the pressure maintaining spring 23 is compressed, the one-way piston 21 approaches the one-way diaphragm 14, and the pressure at the rear end of the air chamber 20 (that is, the pressure between the one-way piston 21 and the one-way diaphragm 14 is greater than the pressure in the disk opening 11). At this time, the one-way diaphragm 14 fits with the exhaust passage 13 to close the exhaust passage 13, and the excess air is discharged through the gap between the one-way piston 21 and the air chamber 20; when the hand is released, the pressure maintaining spring 23 pushes the one-way piston 21 away from the one-way diaphragm 14. At this time, the pressure at the rear end of the air chamber 20 (that is, the pressure between the one-way piston 21 and the one-way diaphragm 14 is less than the pressure in the disk opening 11). At this time, the air in the disk opening 11 pushes open the one-way diaphragm 14 and enters the air chamber 20 to prepare for exhausting in the next pressing. In this way, the air extraction action is realized reciprocally; the sealing lip 211 of the one-way piston 21 is in a horn shape, and its lip opening faces away from the one-way diaphragm 14, so the purpose of one-way air extraction is achieved; when the air in the disk opening 11 is gradually exhausted, affected by the negative pressure, the one-way piston 21 will resist the elastic force of the pressure maintaining spring 23 to limit the pop-up of the pressing member 22, so as to achieve the negative pressure pressure maintaining effect; since the pressing direction of the pressing member 22 is the same as the axis of the disk body 10, the compactness of the structure is effectively ensured, and at the same time it is beneficial to design the shape of the storage rack when assembling with the storage rack.
[0039] In this embodiment, the one-way diaphragm 14 is circular, and a C-shaped notch 141 is provided in its central region. The C-shaped notch 141 enables a diaphragm 142 adapted to fit or separate from the opening of the exhaust passage 13 to be formed at the center of the one-way diaphragm 14. The end face of the air chamber 20 abuts and seals against the outer edge of the one-way diaphragm 14 (refer to Figure 7 , Figure 8 , Figure 9 , Figure 10 ); or the one-way diaphragm 14 is circular, and a fixing post 143 is provided in its central region to form an umbrella-shaped portion 144 at the outer edge of the one-way diaphragm 14. A fixing hole 101 for inserting the fixing post 143 is provided at the top of the disc body 10. The opening of the exhaust passage 13 and the fixing hole 101 are offset. The umbrella-shaped portion 144 is adapted to fit or separate from the opening of the exhaust passage 13 (refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 ).
[0040] In the above structure, the C-shaped notch 141 provides a moving space for the diaphragm 142; the inner and outer diameters of the end of the fixing post 143 away from the one-way diaphragm 14 increase, so as to achieve an anti-detachment effect when it is in interference fit with the fixing hole 101. The thickness of the outer edge of the umbrella-shaped portion 144 is smaller than the thickness at the position close to the fixing post 143, which is beneficial to improving the moving sensitivity of the umbrella-shaped portion 144.
[0041] In this embodiment, a plurality of radial air guiding grooves 111 are provided on the inner wall of the disc opening 11, which are radially opened from the center of the disc opening 11 towards the position close to the outer edge of the disc opening 11; a circumferential air guiding groove 112 concentric with the center of the disc opening 11 is further provided on the inner wall of the disc opening 11, which is opened along its circumferential direction and connected to each radial air guiding groove 111. When there are multiple circumferential air guiding grooves 112, they are offset from each other; the exhaust passage 13 is connected to the radial air guiding groove 111 and / or the circumferential air guiding groove 112.
[0042] In the above structure, the radial air guiding groove 111 and the circumferential air guiding groove 112 can guide the air on the inner wall of the disc opening 11 and discharge it from the exhaust passage 13, avoiding the formation of a local air cavity between the inner wall of the disc opening 11 and the surface of the adsorbed object to cause air entrapment, and improving the exhaust effect.
[0043] In this embodiment, a sealing ring 113 is provided on the side of the outer edge of the disc opening 11 facing away from the top of the disc body 10. When there are multiple sealing rings 113, they are offset from each other.
[0044] In the above structure, the airtightness with the surface of the adsorbed object is improved.
[0045] In this embodiment, a pulling ear 114 is provided at the side wall position of the outer edge of the disc opening 11.
[0046] In the above structure, after adsorption, the outer edge of the socket 11 can be lifted by pulling the ear 114 to allow air to enter the socket 11, thereby removing the suction cup.
[0047] In this embodiment, the disk body 10 is further provided with a pressure relief hole 17 located in the socket 11 and penetrating through its bottom and top; or a plug hole 171 with an inner diameter larger than that of the pressure relief hole 17 is provided at one end of the pressure relief hole 17 facing the socket 11; one end of the pressure relief hole 17 facing the inside of the socket 11 is opened through a radial air guide groove 111 and / or a circumferential air guide groove 112.
[0048] In the above structure, the connection of the pressure relief hole 17 with the radial air guide groove 111 and / or the circumferential air guide groove 112 is beneficial to quickly distribute air throughout the socket 11, avoiding the difficulty of removing the suction cup due to the existence of local negative pressure parts between the inner wall of the socket 11 and the surface of the adsorbed object.
[0049] In this embodiment, when a plug hole 171 is provided at one end of the pressure relief hole 17 facing the socket 11, a pressure relief rod 40 is provided in the pressure relief hole 17. A sealing head 401 adapted to the plug hole 171 is provided at one end of the pressure relief rod 40 facing the socket 11. A pressure relief button 41 is provided at the other end of the pressure relief rod 40 and passes through and exposes outside the disk cover 30. A pressure relief spring 42 for pushing the pressure relief rod 40 to expose the pressure relief button 41 while making the sealing head 401 abut against the end face at the junction of the pressure relief hole 17 and the plug hole 171 to achieve sealing is sleeved on the pressure relief rod 40.
[0050] In the above structure, one end of the pressure relief spring 42 abuts against the pressure relief button 41, and the other end abuts against the supporting part 201 outside the air chamber 20 (the pressure maintaining spring 23 abuts against the end face of the necking 202 at the end of the air chamber 20). The sealing head 401 abuts against the end face at the junction of the pressure relief hole 17 and the plug hole 171 under the elastic force of the pressure relief spring 42 to achieve sealing. When it is necessary to remove the suction cup, just press the pressure relief button 41 to make the sealing head 401 disengage and allow air to enter the socket 11.
[0051] In this embodiment, the mounting part 12 is a mounting bracket 15 located at the top of the disk body 10 and embedded in the disk body 10. Mounting holes 151 are provided on the mounting bracket 15; the air chamber 20 and the disk cover 30 are connected to the mounting bracket 15 by screws 16.
[0052] In the above structure, the mounting bracket 15 is made of plastic or metal. The mounting bracket 15 is integrally embedded directly when the disk body 10 is injected with glue or molded. A pre-embedded nut 152 is provided in the mounting hole 151. The screw 16 is connected to the pre-embedded nut 152. When the disk cover 30 is fixed, the air chamber 20 is pressed onto the disk body 10; the screw 16 can also pass through other parts to be fixed and fix them on the suction cup.
[0053] In this embodiment, a warning ring 221 is provided on the outer side wall of the pressing member 22.
[0054] In the above structure, the warning ring 221 is located at the middle position of the pressing stroke of the pressing member 22 and is used to indicate the negative pressure state in the socket 11. If the warning ring 221 is exposed, it means that the socket 11 needs to be evacuated again.
[0055] In this embodiment, a support cover 31 is provided at one end of the socket cover 30 facing the socket 11. When the socket 11 is adsorbed, the end face of the support cover 31 abuts against the outer edge of the end of the disk body 10 facing away from the socket 11 or is located outside the socket 11 and abuts against the surface of the adsorbed object.
[0056] In the above structure, when the socket 11 adsorbs to the surface of the adsorbed object, its outer diameter will expand. At the same time, the height of the disk body 10 decreases, causing the support cover 31 to abut against the outer edge of the socket 11 to enhance the adsorption force and stability; or directly abut against the surface of the adsorbed object. When the support cover 31 directly abuts against the surface of the adsorbed object, an ear groove 311 for the pull tab 114 to pass through is provided on the end face of the support cover 31.
[0057] The beneficial effects of the present utility model are as follows: The wall thickness of the socket 11 gradually thins near the outer edge, which can improve the fitting effect at the outer edge, and at the same time, the support strength can be gradually increased at a position far from the outer edge to ensure the stability of the suction cup; When evacuating, the pressing member 22 is reciprocally pressed. When pressing down, the pressure maintaining spring 23 is compressed, the one-way piston 21 approaches the one-way diaphragm 14, and the pressure at the rear end of the air chamber 20 (that is, the pressure between the one-way piston 21 and the one-way diaphragm 14 is greater than the pressure in the socket 11). At this time, the one-way diaphragm 14 fits against the exhaust passage 13 to close the exhaust passage 13, and the excess air is discharged from the gap between the one-way piston 21 and the air chamber 20; When releasing the hand, the pressure maintaining spring 23 pushes the one-way piston 21 away from the one-way diaphragm 14. At this time, the pressure at the rear end of the air chamber 20 (that is, the pressure between the one-way piston 21 and the one-way diaphragm 14 is less than the pressure in the socket 11). At this time, the air in the socket 11 pushes the one-way diaphragm 14 to enter the air chamber 20 to prepare for exhausting in the next pressing. In this way, the evacuation action is realized reciprocally; The sealing lip 211 of the one-way piston 21 is in a trumpet shape, and its lip opening faces away from the one-way diaphragm 14, so the purpose of one-way evacuation is achieved; When the air in the socket 11 is gradually exhausted, affected by the negative pressure, the one-way piston 21 will resist the elastic force of the pressure maintaining spring 23 to limit the ejection of the pressing member 22, thereby realizing the negative pressure pressure maintaining effect; Since the pressing direction of the pressing member 22 is the same as the axis of the disk body 10, the compactness of the structure is effectively guaranteed, and at the same time, it is beneficial to design the shape of the storage rack when assembling with the storage rack.
[0058] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made. These improvements and modifications made above should also be regarded as the protection scope of the present utility model.
Claims
1. A suction diaphragm one-way suction cup, comprising a disc body (10), the bottom of the disc body (10) is provided with a disc opening (11), the disc opening (11) is concave, and it is characterized in that: The top of the disc body (10) is provided with an installation part (12) and an exhaust passage (13) located in the central area of the installation part (12) and communicating with the inner cavity of the disc opening (11). A one-way diaphragm (14) covering the outside of the opening of the exhaust passage (13) is provided in the central area of the installation part (12); further included are an air chamber (20) and a disc cover (30) located on the top of the disc body (10). One end of the air chamber (20) faces the one-way diaphragm (14). A one-way piston (21) is provided in the air chamber (20). One end of the one-way piston (21) facing away from the one-way diaphragm (14) is connected with a pressing member (22) extending out of the disc cover (30). A pressure-holding spring (23) for pushing the one-way piston (21) to move towards the top of the disc cover (30) to make the pressing member (22) protrude is further provided in the air chamber (20); when the pressure-holding spring (23) pushes the one-way piston (21) to move towards the top of the disc cover (30), a negative pressure is formed between the one-way piston (21) and the one-way diaphragm (14), so that the air in the disc opening (11) is pumped out through the exhaust passage (13); when the pressing member (22) is pressed, the one-way piston (21) approaches the one-way diaphragm (14) and compresses the pressure-holding spring (23). At the same time, the internal cavity pressure of the air chamber (20) between the one-way diaphragm (14) and the one-way piston (21) increases, so that the one-way diaphragm (14) fits with the exhaust passage (13), forcing the air between the one-way piston (21) and the one-way diaphragm (14) to be discharged through the gap between the one-way piston (21) and the air chamber (20).
2. The air-extracting diaphragm one-way suction cup according to claim 1, characterized in that: The one-way diaphragm (14) is circular. A C-shaped notch (141) is provided in its central area. The C-shaped notch (141) makes a die flap (142) formed at the center of the one-way diaphragm (14) fit or separate from the opening of the exhaust passage (13). The end face of the air chamber (20) abuts against the outer edge of the one-way diaphragm (14) for sealing; or the one-way diaphragm (14) is circular. A fixing column (143) is provided in its central area to make an umbrella-shaped part (144) formed at the outer edge of the one-way diaphragm (14). A fixing hole (101) for inserting the fixing column (143) is provided at the top of the disc body (10). The opening of the exhaust passage (13) and the fixing hole (101) are offset. The umbrella-shaped part (144) fits or separates from the opening of the exhaust passage (13).
3. The air extraction type diaphragm one-way suction cup according to claim 2, characterized in that: A plurality of radial air guide grooves (111) radially arranged from the center of the disc opening (11) towards the position close to the outer edge of the disc opening (11) are provided on the inner wall of the disc opening (11); a circumferential air guide groove (112) concentric with the center of the disc opening (11) and arranged along its circumferential direction and connected with each radial air guide groove (111) is further provided on the inner wall of the disc opening (11). When there are multiple circumferential air guide grooves (112), they are offset from each other; the exhaust passage (13) is connected with the radial air guide grooves (111) or / and the circumferential air guide grooves (112).
4. The air extraction type diaphragm one-way suction cup according to claim 2, characterized in that: A sealing ring (113) is provided on the side of the outer edge of the disc opening (11) facing away from the top of the disc body (10). When there are multiple sealing rings (113), they are offset from each other.
5. The air extraction type diaphragm one-way suction cup according to claim 3, characterized in that: The disc body (10) is further provided with a pressure relief hole (17) located in the disc opening (11) and penetrating through its bottom and top; or a plug hole (171) with an inner diameter larger than that of the pressure relief hole (17) is provided at one end of the pressure relief hole (17) facing the disc opening (11); one end of the pressure relief hole (17) facing the disc opening (11) is opened through a radial air guide groove (111) and / or a circumferential air guide groove (112).
6. The air extraction type diaphragm one-way suction cup according to claim 5, characterized in that: When a plug hole (171) is provided at one end of the pressure relief hole (17) facing the disc opening (11), a pressure relief rod (40) is provided in the pressure relief hole (17), a sealing head (401) adapted to the plug hole (171) is provided at one end of the pressure relief rod (40) facing the disc opening (11), a pressure relief button (41) is provided at the other end of the pressure relief rod (40) and penetrates through and exposes outside the disc cover (30), and a pressure relief spring (42) for pushing the pressure relief rod (40) to expose the pressure relief button (41) and at the same time make the sealing head (401) abut against the end face at the junction of the pressure relief hole (17) and the plug hole (171) to achieve sealing is sleeved on the pressure relief rod (40).
7. The air extraction type diaphragm one-way suction cup according to claim 1, characterized in that: A pull tab (114) is provided at the outer edge side wall position of the disc opening (11).
8. A suction diaphragm one-way suction cup according to claim 1, characterized in that: The mounting portion (12) is a mounting bracket (15) located at the top of the disc body (10) and embedded in the disc body (10), and mounting holes (151) are provided on the mounting bracket (15); the air chamber (20) and the disc cover (30) are connected to the mounting bracket (15) by screws (16).
9. The air extraction type diaphragm one-way suction cup according to claim 1, characterized in that: A warning ring (221) is provided on the outer side wall of the pressing member (22).
10. The air-extracting diaphragm one-way suction cup according to claim 1, characterized in that: One end of the disc cover (30) facing the disc opening (11) is provided with a support cover (31), and when the disc opening (11) is adsorbed, the end face of the support cover (31) abuts against the outer edge of the end of the disc body (10) facing away from the disc opening (11) or is located outside the disc opening (11) and abuts against the surface of the adsorbed object.