Negative-pressure one-way suction cup

Abstract

The negative-pressure one-way suction cup comprises a cup body, a cup opening is formed in the bottom of the cup body, the cup opening is concave inwards and is in a bowl shape, and the wall thickness close to the outer edge of the cup opening is gradually reduced; the top of the tray body is provided with a mounting part and an exhaust passage communicated with an inner cavity of the tray opening; the air chamber and the disc cover are located at the top of the disc body, one end of the air chamber is communicated with the air suction channel, a one-way piston is arranged in the air chamber, and the end, opposite to the air suction channel, of the one-way piston is connected with a pressing piece extending out of the disc cover. A pressure maintaining spring used for pushing the one-way piston to move towards the top of the disc cover to enable the pressing piece to protrude outwards is further arranged in the air chamber. The disc opening makes contact with an adsorbed face and extrudes and exhausts air between the disc opening and the adsorbed face, then the pressing piece is pressed downwards to exhaust air in the air chamber, after the pressing piece is loosened, the pressure maintaining spring pushes the one-way piston to move towards the top of the disc cover, and the air chamber and the disc opening are kept in a negative pressure state all the time.

Description

Technical Field

[0001] The utility model relates to the field of suction cups, in particular to a negative pressure 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 squeezed 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. When squeezing the suction cup, 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, or the adsorption force is reduced due to air leakage into the orifice after long-term use. Content of the Utility Model

[0003] Based on the above problems, the purpose of the utility model is to provide a negative pressure one-way suction cup with a reliable structure, which can provide and maintain a negative pressure state for the suction cup after fixation.

[0004] For the above problems, the following technical solution is provided: a negative pressure one-way suction cup, including a disk body, the bottom of the disk body is provided with an orifice, the orifice is concave in a bowl shape and the wall thickness near the outer edge gradually decreases; the top of the disk body is provided with a mounting part and an air extraction channel communicated with the inner cavity of the orifice; it also includes an air chamber and a disk cover located at the top of the disk body, one end of the air chamber is communicated with the air extraction channel, a one-way piston is arranged in the air chamber, the end of the one-way piston facing away from the air extraction channel is connected with a pressing member extending out of the disk cover, and a pressure maintaining spring for pushing the one-way piston to move towards the top of the disk cover to make the pressing member protrude is also arranged in the air chamber; after the orifice contacts the adsorbed surface and squeezes out the air between the two, the pressing member is pressed down to discharge the air in the air chamber, and after the pressing member is released, the pressure maintaining spring pushes the one-way piston to move towards the top of the disk cover, so that the air chamber and the orifice always maintain a negative pressure state.

[0005] In the above structure, the gradually decreasing wall thickness near the outer edge of the orifice can improve the fitting effect at the outer edge, and at the same time, the support strength can be gradually increased at the position far from the outer edge to ensure the stability of the suction cup; when fixing, after the orifice contacts the adsorbed surface and squeezes out the air between the two, the pressing member is pressed down to discharge the air in the air chamber, and after the pressing member is released, the pressure maintaining spring pushes the one-way piston to move towards the top of the disk cover, so that the air chamber and the orifice always maintain a negative pressure state; the sealing lip of the one-way piston is in a horn shape, and its lip opening faces away from the air extraction channel, so the purpose of discharging the air in the air chamber when pressing down is achieved; 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 ensured, 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 configured such that a radial air guide groove is provided on the inner wall of the socket opening, which is opened from the center of the socket opening towards a position close to the outer edge of the socket opening; a circumferential air guide groove is further provided on the inner wall of the socket opening, which is concentric with the center of the socket opening, opened along its circumferential direction and connected to each radial air guide groove; when there are multiple circumferential air guide grooves, they are offset from each other with the center of the socket opening as the reference.

[0007] In the above structure, the radial air guide groove and the circumferential air guide groove can guide the air on the inner wall of the socket opening and discharge it from the air extraction channel, avoiding the formation of local air cavities between the inner wall of the socket opening and the surface of the adsorbed object to cause air retention, and improving the exhaust effect.

[0008] The present utility model is further configured such that a sealing ring is provided on the side of the outer edge of the socket opening facing away from the top of the disc body; when there are multiple sealing rings, they are offset from each other.

[0009] In the above structure, the airtightness with the surface of the adsorbed object is improved.

[0010] The present utility model is further configured such that a pull tab is provided at the side wall position of the outer edge of the socket opening.

[0011] In the above structure, after adsorption, the outer edge of the socket opening can be lifted through the pull tab to allow air to enter the socket opening, thereby removing the suction cup.

[0012] The present utility model is further configured such that the disc body further has a pressure relief hole located inside the socket 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 socket opening; one end of the pressure relief hole facing the inside of the socket opening is opened through the radial air guide groove and / or the circumferential air guide groove.

[0013] 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 throughout the socket opening, avoiding the difficulty of removing the suction cup due to the existence of local negative pressure parts between the inner wall of the socket opening and the surface of the adsorbed object.

[0014] 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 socket opening, a pressure relief rod is provided in the pressure relief hole, a sealing head adapted to the plug hole is provided at one end of the pressure relief rod facing the socket opening, a pressure relief button passing through the disc cover and exposed outside the disc cover is provided at the other end of the pressure relief rod, and a pressure relief spring for pushing the pressure relief rod to expose the pressure relief button while making the sealing 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.

[0015] 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 of the air chamber end), the sealing 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, only need to press the pressure relief button to make the sealing head disengage to allow air to enter the socket opening.

[0016] The present utility model is further configured such that the mounting portion is a mounting bracket located at the top of the disc body and embedded in the disc body, and the mounting bracket is provided with mounting holes; the air chamber and the disc cover are connected to the mounting bracket by screws.

[0017] In the above structure, the mounting bracket is made of plastic or metal, and the mounting bracket is integrally embedded directly when the disc body is injected with glue or molded; embedded nuts are arranged in the mounting holes, the screws are connected to the embedded nuts, and the disc cover presses the air chamber onto the disc body when fixed; the screws can also pass through other fixed parts and fix them on the suction cup.

[0018] The present utility model is further configured such that a warning ring is provided on the outer side wall of the pressing member.

[0019] 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 disc opening. If the warning ring is exposed, it means that the disc opening needs to be reinstalled for exhaust.

[0020] The present utility model is further configured such that one end of the disc cover facing the disc opening is provided with a support cover, and when the disc opening is adsorbed, the end face of the support cover abuts against the outer edge of the end of the disc body facing away from the disc opening or is located outside the disc opening and abuts against the surface of the adsorbed object.

[0021] In the above structure, when the disc opening adsorbs the surface of the adsorbed object, its outer diameter will expand, and at the same time, the height of the disc body decreases, prompting the support cover to abut against the outer edge of the disc opening to improve 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.

[0022] The beneficial effects of the present utility model are as follows: The wall thickness of the disc opening gradually decreases 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 the position far from the outer edge to ensure the stability of the suction cup; when fixing, the disc opening is brought into contact with the adsorbed surface and squeezed to discharge the air between the two, and then the pressing member is pressed down to discharge the air in the air chamber. After releasing the pressing member, the pressure-holding spring pushes the one-way piston to move towards the top of the disc cover, so that the air chamber and the disc opening always maintain a negative pressure state; the sealing lip of the one-way piston is in a horn shape, and its lip opening faces away from the air extraction channel, so the purpose of discharging the air in the air chamber when pressing down is achieved; since the pressing direction of the pressing member is the same as the axis of the disc body, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall three-dimensional structure schematic diagram of the present utility model.

[0024] Figure 2 is the first full-section three-dimensional structure schematic diagram of the present utility model.

[0025] Figure 3 This is the second fully-sectioned three-dimensional structure schematic diagram of the present utility model.

[0026] Figure 4 This is the exploded three-dimensional structure schematic diagram of the present utility model.

[0027] Figure 5 This is the first exploded three-dimensional structure schematic diagram of the disk body of the present utility model.

[0028] Figure 6 This is the second exploded three-dimensional structure schematic diagram of the disk body of the present utility model.

[0029] The meanings of the reference numerals in the figure: 10 - disk body; 11 - disk opening; 111 - radial air guide groove; 112 - circumferential air guide groove; 113 - sealing ring; 114 - pulling ear; 12 - mounting part; 13 - air extraction channel; 14 - pressure relief hole; 141 - plug hole; 15 - mounting bracket; 151 - mounting hole; 152 - embedded nut; 16 - screw; 20 - air chamber; 201 - supporting part; 202 - necking; 21 - one-way piston; 211 - sealing lip; 22 - pressing member; 221 - warning ring; 23 - pressure maintaining spring; 30 - disk cover; 31 - supporting cover; 311 - ear groove; 40 - pressure relief rod; 41 - plugging head; 42 - pressure relief button; 43 - pressure relief spring. Specific embodiments

[0030] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0031] Refer to Figures 1 to 6 As Figures 1 to 6 shown, a negative pressure one-way suction cup 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. A mounting part 12 and an air extraction channel 13 communicating with the inner cavity of the disk opening 11 are provided at the top of the disk body 10. An air chamber 20 and a disk cover 30 are further provided at the top of the disk body 10. One end of the air chamber 20 is communicated with the air extraction channel 13. A one-way piston 21 is provided in the air chamber 20. One end of the one-way piston 21 facing away from the air extraction channel 13 is connected with a pressing member 22 extending 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 further provided in the air chamber 20. After the disk opening 11 contacts and presses the adsorbed surface to squeeze out the air between the two, the pressing member 22 is pressed down to discharge the air in the air chamber 20. After releasing the pressing member 22, the pressure maintaining spring 23 is used to push the one-way piston 21 to move towards the top of the disk cover 30, so that the inner cavity of the air chamber 20 in the direction of the air extraction channel 13 and the disk opening 11 always maintain a negative pressure state.

[0032] In the above structure, the wall thickness of the mouth 11 gradually decreases near the outer edge, which can improve the fitting effect at the outer edge, and at the same time gradually increase the support strength at a position far from the outer edge to ensure the stability of the suction cup; when fixing, the mouth 11 is in contact with the adsorbed surface and the air between the two is squeezed out, and then the pressing member 22 is pressed down to discharge the air in the air chamber 20. After the pressing member 22 is released, the pressure maintaining spring 23 pushes the one-way piston 21 to move towards the top of the disk cover 30, so that the inner cavity of the air chamber 20 in the direction of the air extraction channel 13 and the inside of the mouth 11 always maintain a negative pressure state; the sealing lip 211 of the one-way piston 21 is in a horn shape, and its lip is facing away from the air extraction channel 13, so the purpose of discharging the air in the air chamber 20 (the inner cavity of the air chamber 20 in the direction of the air extraction channel 13) when pressing down can be achieved; 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.

[0033] In this embodiment, a radial air guiding groove 111 is provided on the inner wall of the mouth 11 and is opened from the center of the mouth 11 towards a position close to the outer edge of the mouth 11; a circumferential air guiding groove 112 is also provided on the inner wall of the mouth 11, which is concentric with the center of the mouth 11 and is opened along its circumferential direction and is connected to each radial air guiding groove 111; when there are multiple circumferential air guiding grooves 112, they are offset from each other with the center of the mouth 11 as the reference.

[0034] 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 mouth 11 and discharge it from the air extraction channel 13, avoiding the formation of a local air cavity between the inner wall of the mouth 11 and the surface of the adsorbed object to cause air entrapment and improving the exhaust effect.

[0035] In this embodiment, a sealing ring 113 is provided on the side of the outer edge of the mouth 11 facing away from the top of the disk body 10; when there are multiple sealing rings 113, they are offset from each other.

[0036] In the above structure, the air tightness with the surface of the adsorbed object is improved.

[0037] In this embodiment, a pull tab 114 is provided at the side wall position of the outer edge of the mouth 11.

[0038] In the above structure, after adsorption, the outer edge of the mouth 11 can be lifted through the pull tab 114 to allow air to enter the mouth 11, thereby removing the suction cup.

[0039] In this embodiment, the disk body 10 is further provided with a pressure relief hole 14 located inside the mouth 11 and penetrating through its bottom and top; or a plug hole 141 with an inner diameter larger than the inner diameter of the pressure relief hole 14 is provided at one end of the pressure relief hole 14 facing the mouth 11; one end of the pressure relief hole 14 facing the inside of the mouth 11 is opened through the radial air guiding groove 111 and / or the circumferential air guiding groove 112.

[0040] In the above structure, the pressure relief hole 14 is connected to the radial air guide groove 111 and / or the circumferential air guide groove 112, which is beneficial to quickly distribute air to the entire disk opening 11, avoiding the difficulty of detaching the suction cup due to local negative pressure areas existing between the inner wall of the disk opening 11 and the surface of the adsorbed object.

[0041] In this embodiment, when a plug hole 141 is provided at one end of the pressure relief hole 14 facing the disk opening 11, a pressure relief rod 40 is provided in the pressure relief hole 14. A sealing head 41 adapted to the plug hole 141 is provided at one end of the pressure relief rod 40 facing the disk opening 11. A pressure relief button 42 is provided at the other end of the pressure relief rod 40, which passes through the disk cover 30 and is exposed outside the disk cover 30. A pressure relief spring 43 is sleeved on the pressure relief rod 40, which is used to push the pressure relief rod 40 to expose the pressure relief button 42 while making the sealing head 41 abut against the end face at the junction of the pressure relief hole 14 and the plug hole 141 to achieve sealing.

[0042] In the above structure, one end of the pressure relief spring abuts against the pressure relief button 42, 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 41 abuts against the end face at the junction of the pressure relief hole 14 and the plug hole 141 under the elastic force of the pressure relief spring 43 to achieve sealing. When it is necessary to detach the suction cup, just press the pressure relief button 42 to make the sealing head 41 disengage and allow air to enter the disk opening 11.

[0043] 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.

[0044] 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 plastic; embedded nuts 152 are provided in the mounting holes 151, and the screws 16 are connected to the embedded nuts 152. When the disk cover 30 is fixed, the air chamber 20 is pressed onto the disk body 10; the screws 16 can also pass through other parts to be fixed and fix them to the suction cup.

[0045] In this embodiment, a warning ring 221 is provided on the outer side wall of the pressing member 22.

[0046] In the above structure, the warning ring 221 is located at the middle position of the pressing stroke of the pressing member 22, which is used to indicate the negative pressure state in the disk opening 11. If the warning ring 221 is exposed, it means that the disk opening 11 needs to be reinstalled and exhausted.

[0047] In this embodiment, a support cover 31 is provided at one end of the disk cover 30 facing the disk opening 11. When the disk opening 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 disk opening 11 or is located outside the disk opening 11 and abuts against the surface of the adsorbed object.

[0048] In the above structure, when the suction port 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, prompting the support cover 31 to abut against the outer edge of the suction port 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.

[0049] Advantages of the present utility model: The wall thickness of the suction port 11 gradually thins near the outer edge, which can improve the fitting effect at the outer edge, and at the same time gradually increase the support strength at a position away from the outer edge to ensure the stability of the suction cup; when fixing, the suction port 11 is brought into contact with the adsorbed surface and the air between the two is squeezed out, and then the pressing member 22 is pressed down to discharge the air in the air chamber 20. After the pressing member 22 is released, the pressure maintaining spring 23 pushes the one-way piston 21 to move towards the top of the disk cover 30, so that the inner cavity of the air chamber 20 in the direction of the one-way piston 21 towards the air extraction channel 13 and the suction port 11 always maintain a negative pressure state; the sealing lip 211 of the one-way piston 21 is in a horn shape, and its lip opening faces away from the air extraction channel 13, so the purpose of discharging the air in the air chamber 20 (the inner cavity of the air chamber 20 in the direction of the one-way piston 21 towards the air extraction channel 13) when pressing down is achieved; 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.

[0050] 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 in this technical field, without departing from the technical principle of the present utility model, several improvements and modifications can be made. These improvements and modifications under the above assumptions should also be regarded as the protection scope of the present utility model.

Claims

1. A negative pressure one-way suction cup, comprising a disc body (10), wherein a disc opening (11) is provided at the bottom of the disc body (10), and the disc opening (11) is concave in a bowl shape, characterized in that: The top of the disc body (10) is provided with an installation part (12) and an air extraction channel (13) communicating with the inner cavity of the disc opening (11); it further includes an air chamber (20) and a disc cover (30) located at the top of the disc body (10). One end of the air chamber (20) is communicated with the air extraction channel (13). A one-way piston (21) is arranged in the air chamber (20). One end of the one-way piston (21) facing away from the air extraction channel (13) is connected with a pressing part (22) extending out of the disc cover (30). A pressure maintaining spring (23) is further arranged in the air chamber (20) for pushing the one-way piston (21) to move towards the top of the disc cover (30) to make the pressing part (22) protrude. After the disc opening (11) contacts the adsorbed surface and squeezes out the air between the two, the pressing part (22) is pressed down to discharge the air in the air chamber (20). After releasing the pressing part (22), the pressure maintaining spring (23) pushes the one-way piston (21) to move towards the top of the disc cover (30), so that the inner cavity of the air chamber (20) in the direction of the one-way piston (21) towards the air extraction channel (13) and the disc opening (11) always maintain a negative pressure state.

2. The negative pressure one-way suction cup according to claim 1, characterized in that: Radial air guiding grooves (111) are arranged on the inner wall of the disc opening (11) and are opened from the center of the disc opening (11) towards the position close to the outer edge of the disc opening (11); circumferential air guiding grooves (112) are also arranged on the inner wall of the disc opening (11), which are concentric with the center of the disc opening (11), are opened along its circumferential direction and are connected with the respective radial air guiding grooves (111); when there are multiple circumferential air guiding grooves (112), they are offset from each other with the center of the disc opening (11) as the reference.

3. A negative pressure one-way suction cup according to claim 1, wherein a sealing ring (113) is arranged on one 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.

4. A negative pressure one-way suction cup according to claim 2, wherein the disc body (10) is further provided with a pressure release hole (14) located in the disc opening (11) and penetrating through its bottom and top; or a plug hole (141) with an inner diameter larger than that of the pressure release hole (14) is arranged at one end of the pressure release hole (14) facing the disc opening (11); one end of the pressure release hole (14) facing the disc opening (11) is opened through the radial air guiding groove (111) and / or the circumferential air guiding groove (112).

5. The negative pressure one-way suction cup according to claim 4, wherein: When a plug hole (141) is arranged at one end of the pressure release hole (14) facing the disc opening (11), a pressure release rod (40) is arranged in the pressure release hole (14). A sealing head (41) adapted to the plug hole (141) is arranged at one end of the pressure release rod (40) facing the disc opening (11). The other end of the pressure release rod (40) is provided with a pressure release button (42) passing through the disc cover (30) and exposed outside the disc cover (30). A pressure release spring (43) is sleeved on the pressure release rod (40) for pushing the pressure release rod (40) to expose the pressure release button (42) and at the same time make the sealing head (41) abut against the end face at the junction of the pressure release hole (14) and the plug hole (141) to achieve sealing.

6. The negative pressure one-way suction cup according to claim 1, characterized in that: A pull tab (114) is arranged at the side wall position of the outer edge of the disc opening (11).

7. A negative pressure one-way suction cup according to claim 1, characterized in that: The installation part (12) is an installation bracket (15) located at the top of the disk body (10) and embedded in the disk body (10). The installation bracket (15) is provided with installation holes (151); the air chamber (20) and the disk cover (30) are connected to the installation bracket (15) by screws (16).

8. The negative pressure 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).

9. A negative pressure one-way suction cup according to claim 1, characterized in that: One end of the disk cover (30) facing the disk opening (11) is provided with a support cover (31). When the disk opening (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 disk opening (11) or is located outside the disk opening (11) and abuts against the surface of the adsorbed object.

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