Electric sucker and control method thereof

Abstract

The invention relates to the field of adsorption devices, in particular to an electric suction cup and a control method thereof.The electric suction cup comprises a suction cup body, an air suction structure, a pressure sensing mechanism and a control mechanism, the suction cup body comprises a shell and an adsorption pad fixedly arranged on the shell, and the side, away from the shell, of the adsorption pad is an adsorption area; the air suction mechanism is contained in the shell and comprises a negative pressure driving assembly, and the negative pressure driving assembly is used for extracting air in the adsorption area; the sensing end of the pressure sensing mechanism is communicated with the adsorption area, the pressure sensing mechanism comprises a pressure response piece and a switch push block, the pressure response piece moves in response to the air pressure change of the adsorption area, and the switch push block is driven by the pressure response piece; the control mechanism comprises a control unit electrically connected with the negative pressure driving assembly to control starting and stopping of the negative pressure driving assembly, a main switch used for controlling starting and stopping of the control unit and a branch switch in abutting fit with the switch push block, and the control unit responds to the state change of the branch switch to start and stop the negative pressure driving assembly.

Description

Technical Field

[0001] This application relates to the field of adsorption devices, specifically to an electric suction cup and its control method. Background Technology

[0002] As a common accessory, the way a phone holder is secured is crucial for both user experience and device safety. Currently, many holders use suction cups to fix them to supporting surfaces, such as car dashboards or glass. Traditional suction cups rely on manual pressing to expel air and create negative pressure. However, due to roughness of the suction surface or material aging, outside air can slowly seep into the suction cup, causing the negative pressure to gradually weaken and eventually leading to accidental detachment. Electric suction cups can solve these problems.

[0003] However, existing electric suction cups typically pump air continuously after power is turned on to maintain suction force. Since the device cannot sense the actual change in vacuum level inside the suction chamber, the motor always operates at full load regardless of whether the current negative pressure meets the suction requirements. This results in the ineffective consumption of battery power, shortening the device's runtime. Furthermore, the continuous operation of the motor for a long time generates noise and accelerates the mechanical wear of the motor and pump. Some electric suction cups use pressure sensors to monitor the internal vacuum level, and the pressure sensors are always in operation, which also consumes battery power and shortens the device's runtime. Summary of the Invention

[0004] In order to solve the technical problems in the prior art, this application provides an electric suction cup.

[0005] The electric suction cup provided in this application adopts the following technical solution: An electric suction cup, comprising: The suction cup body includes a housing and an adsorption pad fixed to the housing, wherein the side of the adsorption pad facing away from the housing is the adsorption area; A suction mechanism is housed in the housing, and the suction mechanism includes a negative pressure drive component for extracting gas from the adsorption zone; A pressure sensing mechanism, the sensing end of which is connected to the adsorption zone, includes a pressure response element whose side facing away from the adsorption zone is connected to the external atmosphere and can be displaced in response to changes in the air pressure of the adsorption zone, and a switch push block driven by the pressure response element. A control mechanism, housed in the housing, includes a control unit electrically connected to the negative pressure drive assembly to control its start and stop, a main switch for controlling the start and stop of the control unit, and a branch switch that abuts against the switch push block. The control unit is electrically connected to the branch switch and receives signals from the branch switch to start and stop the negative pressure drive assembly.

[0006] By adopting the above technical solution, when the negative pressure drive component operates and reduces the gas pressure in the adsorption zone, the pressure response element connected to the adsorption zone is displaced under the action of the pressure difference. The pressure response element then drives the switch push block to act on the branch switch, thereby changing the state of the branch switch. The control unit responds to the state change of the branch switch and then controls the negative pressure drive component to stop working to maintain pressure. When the gas pressure in the adsorption zone rises due to leakage, the pressure response element is reset by the pressure change and drives the switch push block again to restore the branch switch to its initial state. The control unit then responds to this change to restart the negative pressure drive component to replenish gas.

[0007] Preferably, the housing includes a mounting base plate for mounting the adsorption pad, a rotating ring, and a cover fixed to the mounting base plate. The rotating ring is located between the cover and the mounting base plate and is rotatably connected to both the mounting base plate and the cover. The inner wall of the rotating ring is formed with a drive lever that cooperates with the main switch.

[0008] By adopting the above technical solution, when the rotating ring rotates relative to the housing, the drive block moves with the rotating ring and contacts the main switch, thereby realizing the control of the main switch by rotating the cover.

[0009] Preferably, the negative pressure drive assembly includes a housing, a piston that reciprocates within the housing, and a drive component connected to the piston. The housing is provided with an outlet pipe. The suction mechanism further includes an air chamber, which connects the adsorption area and the housing. The outlet pipe is provided with a first one-way valve, which is configured to allow gas to be discharged from the housing only. A second one-way valve is provided between the air chamber and the housing, which is configured to allow gas to enter the housing only from the air chamber.

[0010] By adopting the above technical solution, the driving component drives the piston to reciprocate. During the reciprocating motion, the piston pushes the gas out of the outlet pipe and at the same time draws the air in the adsorption zone from the intake pipe, thereby gradually extracting the air in the adsorption zone to generate negative pressure.

[0011] Preferably, the air chamber includes a chamber body and a sealing element. One end of the chamber body is connected to the negative pressure drive assembly, and the other end is a vent opening. The side wall of the vent opening is formed with a venting slope. A venting groove is formed between the venting slope and the sealing element. The air intake mechanism also includes a pressure relief block rotatably connected to the mounting base plate. The pressure relief block includes a venting part inserted into the venting groove and an abutment part for contacting the drive lever. The rotating ring is configured to trigger the main switch when rotating in one direction, and when rotating in the opposite direction, the drive lever pushes against the abutment part to drive the venting part to open the sealing element.

[0012] By adopting the above technical solution, since a conventional adsorption pad requires prying the edge of the adsorption pad to release its adsorption state, this setup results in the edge of the adsorption pad being relatively soft and easily affected by external interference, thus compromising the airtightness of the adsorption pad. With the setting of the pressure relief block, when the rotating ring rotates in the first direction to turn on the main switch, if it is necessary to remove the suction cup, the rotating ring is rotated in the second direction opposite to the first direction. The rotating ring drives the drive block to contact the abutment part, and the drive block pushes against the abutment part, thereby driving the pressure relief block to rotate. The venting part of the pressure relief block pushes open the sealing part, thereby breaking the air pressure inside the air chamber and releasing the negative pressure state of the adsorption area.

[0013] Preferably, the suction mechanism further includes an elastic abutment fixed to the mounting base plate, the elastic abutment abutting against the side of the sealing member opposite to the vent opening.

[0014] By adopting the above technical solution, the elastic abutment is used to apply pressure to the sealing member to ensure the sealing performance of the sealing member on the vent opening. When the driving block leaves the abutment part of the pressure relief block, the elastic abutment drives the sealing member to reset so as to re-seal the vent opening.

[0015] Preferably, the pressure sensing mechanism further includes a pressure sensing tube communicating with the adsorption area, and an elastic element housed in the pressure sensing tube. The inner wall surface of the pressure sensing tube is formed with an abutting ring surface. The pressure response element is housed in the pressure sensing tube. One end of the elastic element is connected to the abutting ring surface, and the other end is connected to the pressure response element.

[0016] By adopting the above technical solution, when the suction mechanism generates negative pressure in the adsorption zone, the pressure response element moves towards the adsorption zone under the action of negative pressure. When the outside air gradually seeps into the adsorption zone, the pressure response element resets under the action of the elastic element. During the reset process, the switch push block touches the sub-switch, and the control unit responds to the change of the sub-switch, thereby controlling the suction mechanism to continue generating negative pressure.

[0017] Preferably, the suction cup body further includes a pressure ring, which is embedded in the side of the adsorption pad facing the adsorption area, and the edge of the adsorption pad is exposed in the pressure ring.

[0018] By adopting the above technical solution, since the adsorption pad is made of soft material, its edges are prone to elastic deformation during use, which affects the airtightness of the adsorption pad. By setting the pressure ring, the hardness of the edge of the adsorption pad is increased, making the contact between the edge of the adsorption pad and the adsorption surface tighter.

[0019] A method for controlling an electric suction cup includes the following steps: S1. Turn on the main switch. At this time, the switch push block presses the branch switch. Both the main switch and the branch switch are in the conducting state. The control unit controls the negative pressure drive component to start working. S2. The negative pressure drive component draws air to displace the pressure response element in the first direction until the pressure response element, along with the switch push block, disengages from the sub-switch and is no longer pressed. At this point, the sub-switch is closed, the negative pressure drive component is stopped, and the adsorption pad enters the pressure holding monitoring state. S3. When the gas pressure in the adsorption zone rises, the pressure response element resets in the direction opposite to the first direction, and the associated switch push block completes a subsequent press on the sub-switch; S4. In response to the subsequent press, the control unit immediately starts the negative pressure drive assembly, the pressure response element moves again in the first direction, and when the switch push block disengages from the switch again, the negative pressure drive assembly stops running again, and the adsorption pad enters the pressure holding monitoring state again. S5. Repeat steps S3 to S4 to maintain negative pressure.

[0020] By adopting the above technical solution, the pressing of the branch switch is used as the trigger signal. The physical stroke of the pressure response component to drive the switch push block displacement forms a mechanical lag. After the negative pressure drive component is started, it needs to continuously pump air until the pressure response component generates enough displacement to completely disengage the switch push block from the branch switch before stopping. This avoids frequent start-stop caused by the mechanical switch shaking at the critical point. This method ensures sufficient negative pressure, avoids over-operation, and reduces energy consumption.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. When the negative pressure drive assembly operates and reduces the air pressure in the adsorption zone, the pressure response element connected to the adsorption zone displaces under the pressure difference. This pressure response element then drives the switch push block and the branch switch, thereby changing the state of the branch switch. The control unit responds to the change in the branch switch's state and controls the negative pressure drive assembly to stop operating to maintain pressure. When the air pressure in the adsorption zone rises due to leakage, the pressure response element resets due to the pressure change and again drives the switch push block to restore the branch switch to its initial state. The control unit then responds to this change to restart the negative pressure drive assembly to replenish air.

[0022] 2. Because conventional adsorption pads require prying their edges to release adsorption, this design results in soft edges that are easily affected by external interference, compromising the pad's airtightness. By using a pressure relief block, the opening and pressure relief operations are configured with opposite rotation directions. When the rotating ring activates the main switch in one direction, rotating it in the opposite direction activates the main switch via the drive lever. Continuing to rotate the ring causes the drive lever to contact the contact part, pushing against it and rotating the pressure relief block. The venting part of the pressure relief block opens the sealing element, thus breaking the air pressure inside the air chamber and releasing the negative pressure in the adsorption zone. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an electric suction cup provided in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the internal structure of an electric suction cup provided in Embodiment 1 of this application; Figure 3 This is a cross-sectional view of an electric suction cup provided in Embodiment 1 of this application; Figure 4 This is a cross-sectional view of the pressure sensing mechanism of Embodiment 1 of this application; Figure 5 yes Figure 3 Enlarged view of region A in the middle; Figure 6 This is a cross-sectional view of the air chamber in Embodiment 1 of this application; Explanation of reference numerals in the attached drawings: 1. Suction cup body; 11. Housing; 111. Mounting base plate; 112. Rotating ring; 1121. Drive lever; 113. Cover; 12. Adsorption pad; 121. Adsorption area; 13. Pressure ring; 2. Suction mechanism; 21. Negative pressure drive assembly; 211. Receiving shell; 2111. Air outlet pipe; 212. Piston; 213. Drive component; 22. Air chamber; 221. Chamber body; 2211. Vent opening; 2212. Vent slope ; 2213, Venting groove; 2214, Suction pipe; 222, Sealing component; 23, Pressure relief block; 231, Venting section; 232, Abutting section; 24, Elastic abutting component; 25, First check valve; 26, Second check valve; 3, Pressure sensing mechanism; 31, Pressure response component; 32, Switch push block; 33, Pressure sensing tube; 331, Abutting ring surface; 34, Elastic component; 4, Control mechanism; 41, Control unit; 42, Main switch; 43, Sub-switch. Detailed Implementation

[0024] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail. Example

[0025] This application discloses an electric suction cup. (Refer to...) Figure 1-3 , Figure 1 This is a schematic diagram of the structure of an electric suction cup provided in Embodiment 1 of this application. An electric suction cup includes a suction cup body 1, a suction mechanism 2, a pressure sensing mechanism 3, and a control mechanism 4.

[0026] The suction cup body 1 includes a housing 11 and an adsorption pad 12 fixed to the housing 11. The housing 11 is the supporting structure of the entire electric suction cup and can be made of materials such as plastic or metal. The adsorption pad 12 is made of a soft material such as rubber, and its side facing away from the housing 11 is the adsorption area 121. The suction cup body 1 also includes a pressure ring 13 embedded in the side of the adsorption pad 12 facing the adsorption area 121, and the edge of the adsorption pad 12 is exposed outside the pressure ring 13. Because the adsorption pad 12 is a soft material, its edge is prone to elastic deformation under negative pressure or external force during use, which may affect the sealing performance. The pressure ring 13 is preferably made of high-strength engineering plastic or lightweight metal. The pressure ring 13 can be embedded in the adsorption pad 12 in the form of a slot. By setting the pressure ring 13, the rigidity of the edge of the adsorption pad 12 is increased, making it less prone to deformation when it is in contact with the adsorption surface. This allows it to maintain a more stable contact state, thereby improving the overall airtightness of the adsorption pad 12. At the same time, it also increases the contact area between the adsorption pad 12 and the adsorption surface, making the adsorption pad 12 less prone to slippage.

[0027] The intake mechanism 2 is housed in the housing 11 and includes a negative pressure drive assembly 21, an air chamber 22 communicating with the negative pressure drive assembly 21, and a related pressure relief structure. The negative pressure drive assembly 21 includes a housing 211 connected to an exhaust pipe 2111, a piston 212 located within the housing 211, and a drive member 213 that drives the piston 212 to reciprocate. The drive member 213 is used to convert the energy of the power source into the linear reciprocating motion of the piston 212. In this application, the drive member 213 can be a crank-slider mechanism. This mechanism includes a motor, a crank fixed to the output shaft of the motor at one end, and a connecting rod hinged to the crank at one end and to the piston 212 at the other end. When the motor is working, its output shaft drives the crank to perform a constant-speed circular motion. The crank smoothly converts the rotational motion into the reciprocating linear motion of the piston 212 within the housing 211 through the connecting rod. The stroke of the piston 212 is determined by the radius of the crank. In this way, the piston 212 reciprocates regularly within the housing 211, realizing the pumping and exhausting processes.

[0028] In this embodiment, the suction mechanism 2 achieves unidirectional air extraction through a specific valve body structure.

[0029] The housing 211 is equipped with an outlet pipe 2111, and a first one-way valve 25 is installed inside the outlet pipe 2111. The air chamber 22 connects the adsorption zone 121 and the housing 211, and a second one-way valve 26 is installed in the connection passage between the air chamber 22 and the housing 211. When the piston 212 moves away from the air chamber 22, the air pressure inside the housing 211 decreases, and the external atmospheric pressure presses the elastic valve plate of the first one-way valve 25 to close it; simultaneously, air from the adsorption zone 121 enters the air chamber 22 through the intake pipe 2214, opening the second one-way valve 26 and entering the housing 211. When the piston 212 moves closer to the air chamber 22, the air pressure inside the housing 211 increases, and the high-pressure gas presses the second one-way valve 26 to close it, preventing gas from flowing back into the adsorption zone 121; simultaneously, the high-pressure gas opens the first one-way valve 25 in the outlet pipe 2111, discharging the gas to the outside. This cycle repeats, gradually extracting air from the adsorption zone 121.

[0030] Please refer to the following: Figure 4 , Figure 4 This is a cross-sectional view of the pressure sensing mechanism 3 according to Embodiment 1 of this application. The sensing end of the pressure sensing mechanism 3 is connected to the adsorption zone 121. The pressure sensing mechanism 3 includes a pressure response element 31 with one side facing away from the adsorption zone connected to the external atmosphere and capable of displacement in response to changes in the air pressure of the adsorption zone 121, and a switch push block 32 driven by the pressure response element 31. The mechanism also includes a pressure sensing tube 33 connected to the adsorption zone 121, which contains the pressure response element 31 and an elastic element 34, which can be a spring. The inner wall of the pressure sensing tube 33 is formed with an abutment annular surface 331. One end of the elastic element 34 is connected to the abutment annular surface 331, and the other end is connected to the pressure response element 31. When the air pressure in the adsorption zone 121 decreases, the pressure response element 31 is slidably connected inside the pressure sensing tube 33 and is displaced by overcoming the elastic force of the elastic element 34 under the action of the internal and external pressure difference; when the air pressure in the adsorption zone 121 rises again, the pressure response element 31 is reset under the action of the elastic element 34.

[0031] The control mechanism 4 is housed in the housing 11 and includes a control unit 41, a main switch 42, and a branch switch 43. The control unit 41 is electrically connected to the drive element 213 of the negative pressure drive assembly 21 to control its start and stop. The control unit 41 may be a printed circuit board integrating a microcontroller; the branch switch 43 may be a push-button microswitch, with the contact surface between the trigger button of the branch switch 43 and the switch push block 32 being an arc surface. The branch switch 43 is fixedly installed inside the housing 11, positioned directly opposite the end travel path of the switch push block 32, and is used to sense whether the negative pressure has reached a threshold; the main switch 42 includes a power toggle, which is the actuating component of the main switch 42. The rotation of the power toggle controls the opening and closing of the main switch 42. The reciprocating movement of the pressure response element 31 directly drives the switch push block 32 to move synchronously, thereby interacting with or separating from the branch switch 43, realizing the conversion of the air pressure signal into a mechanical switch signal. The control unit 41 responds to the state change of the branch switch 43 to start and stop the negative pressure drive assembly 21.

[0032] For convenient operation, the housing 11 includes a mounting base plate 111 for mounting the adsorption pad 12, a rotating ring 112, and a cover 113 fixed to the mounting base plate 111. The rotating ring 112 is located between the cover 113 and the mounting base plate 111, and is rotatably connected to both. The inner wall of the rotating ring 112 is formed with a drive lever 1121 that cooperates with the main switch 42. The drive lever 1121 may be made of rubber. When the rotating ring 112 rotates relative to the housing 11 in one direction, the drive lever 1121 moves accordingly and pushes against the power switch of the main switch 42. The power switch rotates, turning on the power to the device. After the main switch 42 is turned on, rotating the rotating ring 112 in another direction causes the drive lever 1121 to push against the power switch of the main switch 42 again, thereby turning off the power. To optimize the user's operating feel and prevent accidental operation, spring balls and limiting ribs are provided on the inner wall of the cover 113 or the mounting base 111. Positioning grooves are provided on the rotating ring 112 corresponding to the position where the main switch 42 is on and the position where the pressure relief block 23 is pushed to release air. The limiting ribs cooperate with the drive lever 1121. When the rotating ring 112 rotates to the on or venting position, the elastic positioning element engages with the positioning groove to provide a tactile feedback, while the limiting ribs abut against the drive lever 1121, limiting the rotation of the rotating ring 112 and preventing excessive rotation from damaging internal components.

[0033] Please refer to the following: Figure 5-6 , Figure 6This is a cross-sectional view of the air chamber 22 in Embodiment 1 of this application. To achieve rapid depressurization, the air chamber 22 includes a chamber body 221 and a sealing member 222. One end of the chamber body 221 is a vent opening 2211, and the other end is connected to the interior of the receiving shell 211 through a pipe. The side wall of the vent opening 2211 is formed with a venting slope 2212, and a venting groove 2213 is formed between the venting slope 2212 and the sealing member 222. The suction mechanism 2 also includes a pressure relief block 23 rotatably connected to the mounting base plate 111. The pressure relief block 23 includes an abutment part 232 for contacting the drive lever 1121 and a venting part 231 inserted into the venting groove 2213. When the drive lever 1121 turns on the main switch 42, the rotating ring 112 rotates in the opposite direction. The drive lever 1121 will contact the abutment part 232 of the pressure relief block 23, thereby driving the pressure relief block 23 to rotate. This causes the venting part 231 of the pressure relief block 23 to push open the sealing member 222, opening the venting opening 2211, and quickly balancing the air pressure inside and outside the adsorption zone 121 to release the adsorption. The suction mechanism 2 also includes an elastic abutment member 24 fixed to the mounting base plate 111. The elastic abutment member 24 can be a spring or two mutually repelling magnetic blocks. The elastic abutment member 24 abuts against the side of the sealing member 222 away from the venting opening 2211, applying pressure to the sealing member 222 to ensure its sealing performance. After the drive lever 1121 leaves the pressure relief block 23, the sealing member 222 is reset under the elastic force of the elastic abutment member 24, resealing the venting opening 2211.

[0034] The working principle of this embodiment is as follows: First, the user rotates the rotating ring 112 in one direction, driving the toggle block 1121 to trigger the main switch 42. The control unit 41 is energized and commands the drive component 213 to work. The drive component 213 drives the piston 212 to reciprocate within the housing 211. In conjunction with the unidirectional airflow structure, air is continuously drawn out of the adsorption zone 121 and discharged to the outside, thereby establishing a negative pressure environment 13 between the adsorption pad 12 and the adsorption surface.

[0035] As the negative pressure in the adsorption zone 121 increases, the pressure inside the pressure sensing tube 33 decreases. Under the pressure difference between atmospheric pressure and the internal negative pressure, the pressure response element 31 overcomes the elastic force of the elastic element 34 and moves towards the adsorption zone 121. When the negative pressure reaches a preset threshold, the switch push block 32 driven by the pressure response element 31 triggers the branch switch 43 located at the end of its stroke. After receiving the signal from the branch switch 43, the control unit 41 cuts off the power to the drive element 213, the suction stops, and the electric suction cup enters a low-power pressure-holding state.

[0036] After a period of time, if the gas pressure in the adsorption zone 121 rises due to a minor leak, the pressure difference acting on the pressure response element 31 decreases. The restoring force of the elastic element 34 pushes the pressure response element 31 back to its initial position, and the switch push block 32 releases the branch switch 43. The control unit 41 detects that the branch switch 43 has been reset and restarts the drive element 213 to pump air until the negative pressure reaches the target again, thus achieving closed-loop control.

[0037] When the adsorption pad 12 needs to be removed, the user rotates the rotating ring 112 in the opposite direction to the main switch 42. This drives the toggle block 1121 to push the abutment part 232 of the pressure relief block 23 in a circular motion, causing the toggle block 1121 to rub against the pressure relief block 23, thus rotating the pressure relief block 23. The venting part 231 of the pressure relief block 23 pushes open the sealing part 222 of the air chamber 22. Outside air quickly rushes into the air chamber 22 and the adsorption area 121, breaking the negative pressure, thereby achieving rapid detachment without residual suction. Example

[0038] This embodiment provides a control method for an electric suction cup, used to control an electric suction cup provided in Embodiment 1. The control method includes the following steps: S1. Rotating the rotating ring 112 drives the drive lever 1121 to turn on the main switch 42. At this time, since negative pressure has not yet been established in the adsorption zone 121, the pressure response element 31 is in the initial position, and the switch push block 32 is in the state of pressing the branch switch 43. Both the main switch 42 and the branch switch 43 are in the conducting state. After receiving the signal, the control unit 41 controls the negative pressure drive assembly 21 to start working. S2. As the negative pressure drive assembly 21 operates, the air pressure in the adsorption zone 121 gradually decreases. Under the action of the pressure difference, the pressure response element 31 in the pressure sensing mechanism 3 moves in the first direction, i.e., the direction where the adsorption zone 121 is located. Until the pressure response element 31, along with the switch push block 32, passes the sub-switch 43 and no longer presses the sub-switch 43, the sub-switch 43 closes, the signal is disconnected, and the control unit 41 immediately stops the negative pressure drive assembly 21. The adsorption pad 12 enters the pressure holding monitoring state. In this application, if the switch push block 32 does not contact the sub-switch within thirty seconds, the control unit 41 controls the negative pressure drive assembly 21 to be forcibly stopped. S3. When the gas pressure in the adsorption zone 121 rises, the pressure response element 31 resets in the direction opposite to the first direction, and the associated switch push block 32 completes a subsequent press of the dispensing switch 43. S4. In response to the subsequent press, the control unit 41 immediately starts the negative pressure drive assembly 21. The pressure response element 31 moves again in the first direction. When the switch push block 32 disengages from the switch 43 again, i.e., when no more pressing is required, the negative pressure drive assembly 21 stops running again, and the adsorption pad 12 enters the pressure holding monitoring state again. S5. Repeat steps S3 to S4 to continuously maintain negative pressure. When it is necessary to release the adsorption state, rotate the rotating ring 112 in the second direction opposite to the first direction, driving the toggle block 1121 to act on the pressure relief block 23 and open the venting channel. By continuously monitoring the pressure change of the adsorption zone 121 and controlling the start and stop of the negative pressure drive component 21 according to the pressure change, the function of automatically maintaining the negative pressure of the adsorption zone 121 is realized.

[0039] The working principle of the control method in this embodiment is as follows: when there is no negative pressure or the negative pressure is insufficient, the pressure response element 31 is in the reset state, and the switch push block 32 forcibly presses the sub switch 43 to ensure that the motor will continue to work as long as the suction force is insufficient.

[0040] The motor will only stop when the negative pressure accumulates to a level sufficient to move the pressure response element 31 a specific distance, causing the switch push block 32 to completely move out of the trigger range of the branch switch 43. This ensures that the suction cup has reached a safe negative pressure value each time it stops. If air leakage causes the negative pressure to drop, the spring will push the pressure response element 31 back, and the switch push block 32 will touch the switch again to trigger air replenishment.

[0041] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Any other corresponding changes and modifications made based on the technical concept of this application should be included within the scope of protection of this application.

Claims

1. An electric suction cup, characterized in that, include: The suction cup body (1) includes a housing (11) and an adsorption pad (12) fixed to the housing (11), wherein the side of the adsorption pad (12) facing away from the housing (11) is an adsorption area (121); A suction mechanism (2) is housed in the housing (11). The suction mechanism (2) includes a negative pressure drive assembly (21) for extracting gas from the adsorption zone (121). A pressure sensing mechanism (3) is provided, the sensing end of which is connected to the adsorption zone (121). The pressure sensing mechanism (3) includes a pressure response element (31) on one side away from the adsorption zone (121) that is connected to the external atmosphere and can be displaced in response to changes in the air pressure of the adsorption zone (121), and a switch push block (32) driven by the pressure response element (31). A control mechanism (4) is housed in the housing (11). The control mechanism (4) includes a control unit (41) electrically connected to the negative pressure drive assembly (21) to control its start and stop, a main switch (42) for controlling the start and stop of the control unit (41), and a branch switch (43) that abuts against the switch push block (32). The control unit (41) is electrically connected to the branch switch (43) and receives signals from the branch switch (43) to start and stop the negative pressure drive assembly (21).

2. The electric suction cup according to claim 1, characterized in that, The housing (11) includes a mounting base plate (111) for mounting the adsorption pad (12), a rotating ring (112), and a cover (113) fixed to the mounting base plate (111). The rotating ring (112) is located between the cover (113) and the mounting base plate (111) and is rotatably connected to the mounting base plate (111) and the cover (113) respectively. The inner wall of the rotating ring (112) is formed with a drive lever (1121) that cooperates with the main switch (42).

3. An electric suction cup according to claim 2, characterized in that, The negative pressure drive assembly (21) includes a housing (211), a piston (212) that reciprocates within the housing (211), and a drive member (213) that is drivenly connected to the piston (212). The housing (211) is provided with an exhaust pipe (2111). The suction mechanism (2) also includes an air chamber (22). The air chamber (22) connects the adsorption zone (121) and the housing (211). The exhaust pipe (2111) is provided with a first one-way valve (25). The first one-way valve (25) is configured to allow gas to be discharged from the housing (211) only. A second one-way valve (26) is provided between the air chamber (22) and the housing (211). The second one-way valve (26) is configured to allow gas to enter the housing (211) only from the air chamber (22).

4. An electric suction cup according to claim 3, characterized in that, The air chamber (22) includes a chamber body (221) and a sealing component (222). One end of the chamber body (221) is connected to the negative pressure drive assembly (21), and the other end is a vent opening (2211). The side wall of the vent opening (2211) is formed with a venting ramp (2212). A venting groove (2213) is formed between the venting ramp (2212) and the sealing component (222). The air intake mechanism (2) also includes a component rotatably connected to the mounting base plate (111). The pressure relief block (23) includes a venting part (231) inserted into the venting groove (2213) and an abutment part (232) for contacting the drive lever (1121). When the rotating ring (112) rotates in one direction, it triggers the main switch (42). When it rotates in the opposite direction, the drive lever (1121) pushes against the abutment part (232) to drive the venting part (231) to open the sealing member (222).

5. An electric suction cup according to claim 4, characterized in that, The suction mechanism (2) further includes an elastic abutment (24) fixed to the mounting base plate (111), the elastic abutment (24) abutting against the side of the sealing member (222) away from the vent opening (2211).

6. An electric suction cup according to claim 3, characterized in that, The pressure sensing mechanism (3) further includes a pressure sensing tube (33) communicating with the adsorption area (121) and an elastic member (34) housed in the pressure sensing tube (33). The inner wall of the pressure sensing tube (33) is formed with an abutting ring surface (331). The pressure response member (31) is housed in the pressure sensing tube (33). One end of the elastic member (34) is connected to the abutting ring surface (331), and the other end is connected to the pressure response member (31).

7. An electric suction cup according to claim 1, characterized in that, The suction cup body (1) also includes a pressure ring (13), which is embedded in the side of the adsorption pad (12) facing the adsorption area (121), and the edge of the adsorption pad (12) is exposed in the pressure ring (13).

8. A control method for an electric suction cup, used to control an electric suction cup as described in any one of claims 1-7, characterized in that, The control method includes the following steps: S1. Turn on the main switch (42). At this time, the switch push block (32) presses the branch switch (43). Both the main switch (42) and the branch switch (43) are in the conducting state. The control unit (41) controls the negative pressure drive assembly (21) to start working. S2. The negative pressure drive assembly (21) draws air to displace the pressure response element (31) in the first direction until the pressure response element (31) and the switch push block (32) disengage from the sub-switch (43) and are no longer pressed. At this time, the sub-switch (43) is closed, the negative pressure drive assembly (21) is stopped, and the adsorption pad (12) enters the pressure holding monitoring state. S3. When the gas pressure in the adsorption zone (121) rises, the pressure response element (31) resets in the direction opposite to the first direction, and the associated switch push block (32) completes a subsequent press on the sub-switch (43); S4. In response to the subsequent press, the control unit (41) immediately starts the operation of the negative pressure drive assembly (21), the pressure response element (31) moves to the first direction again, and when the switch push block (32) and the branch switch (43) disengage again, the negative pressure drive assembly (21) stops running again, and the adsorption pad (12) enters the pressure holding monitoring state again. S5. Repeat steps S3 to S4 to maintain negative pressure.

Images