A negative pressure suction device

Abstract

The present application belongs to the technical field of connector, and relates to a negative pressure adsorption device, which comprises a shell, an upper adsorption disc installed on the top surface of the shell, a fixing mechanism installed on the bottom surface of the shell, an air extraction mechanism and a gas release mechanism installed in the shell; the air extraction mechanism comprises an inner cavity unit and an air extraction unit, the inner cavity unit is internally provided with a gas release chamber and a plurality of small chambers which are sequentially communicated, each small chamber is provided with a one-way pressure retaining valve along the air extraction direction, one end of the inner cavity unit is communicated with an upper outer cavity formed by the upper adsorption disc and the adsorbed object, and the other end thereof is communicated with the air extraction unit, the air extraction unit extracts the air in the upper outer cavity through the inner cavity unit, so that a negative pressure environment is formed in the upper outer cavity to adsorb and fix the object; and the beneficial effect is that the technical problems that the existing adsorption structure cannot stably fix the object and is inconvenient to take down the object fixed on the adsorption structure can be solved.

Description

Technical Field

[0001] This invention relates to the field of connector technology, and more particularly to a negative pressure adsorption device. Background Technology

[0002] Adsorption structures, as a type of connecting device, are widely used in daily life to fix objects in place, securing them to a user-preset location through adsorption. However, due to the diverse application scenarios, the requirements for adsorption structures vary greatly.

[0003] In existing technologies, when an adsorption structure fixes an object in a user-preset position, it typically uses natural adsorption to achieve fixation. This method makes it easy for the object to loosen, shift, or detach relative to the adsorption structure. When the user removes the object fixed to the adsorption structure, they need to overcome the adsorption effect, making removal inconvenient.

[0004] Therefore, there is a need for an adsorption device that can more stably fix objects and easily remove the fixed objects. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a negative pressure adsorption device, which solves the technical problems that the existing adsorption structure cannot stably fix objects and is inconvenient to remove objects fixed on the adsorption structure.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] This invention provides a negative pressure adsorption device, including a housing, an upper adsorption plate mounted on the top surface of the housing, a fixing mechanism mounted on the bottom surface of the housing, an air extraction mechanism and an air release mechanism mounted in the housing;

[0010] The air extraction mechanism includes an inner cavity unit and an air extraction unit. The inner cavity unit has an air release chamber and several small chambers connected in sequence. Each small chamber is equipped with a one-way pressure holding valve along the direction of air extraction. One end of the inner cavity unit is connected to the upper outer cavity formed by the upper adsorption plate and the adsorbed object, and the other end is connected to the air extraction unit. The air extraction unit extracts air from the upper outer cavity through the inner cavity unit to create a negative pressure environment in the upper outer cavity to adsorb and fix the object.

[0011] Optionally, the fixing mechanism includes a lower adsorption plate and / or a permanent magnet ring, wherein the lower adsorption plate is installed on the bottom surface of the housing, and the lower adsorption plate and another adsorbed object form a lower outer cavity;

[0012] The inner cavity unit includes a first mating part and a second mating part, which are sealed together to form a venting chamber and three small chambers. The outer wall of the first mating part extends forward to form an upper air inlet, which communicates with the second small chamber and is connected to the upper outer cavity through a trachea.

[0013] The outer wall of the second mating part extends rearward to form a lower air inlet. The lower air inlet is connected to the lower outer cavity through an air pipe. The lower air inlet is connected to the first small chamber and the venting chamber respectively.

[0014] The outer wall of the second mating part extends rearward to form a movable cavity, which is connected to the second chamber and the third chamber respectively. The third chamber has an air outlet at the front position.

[0015] The air extraction unit includes a piston rod and a motor. One end of the piston rod is slidably disposed in the movable chamber, and the other end is connected to the output end of the motor.

[0016] Optionally, the cross-section of the one-way pressure holding valve is "V" shaped, and its tip is provided with a strip opening that allows one-way air flow.

[0017] Optionally, each one-way pressure holding valve divides its corresponding chamber into a V-shaped area and a conical area. The conical area corresponds to the space enclosed by the inner wall of the one-way pressure holding valve and the chamber, and the V-shaped area corresponds to the space enclosed by the outer wall of the one-way pressure holding valve and the chamber. The venting chamber is connected to the conical area of ​​the first chamber to form a first cavity. The V-shaped area of ​​the first chamber and the conical area of ​​the second chamber form a second cavity. The V-shaped area of ​​the second chamber, the movable chamber, and the conical area of ​​the third chamber form a third cavity.

[0018] When the piston rod moves backward to draw air, the one-way pressure-holding valves in the first and second chambers open, and the one-way pressure-holding valve in the third chamber closes, so that the third and second chambers are connected to the first chamber, and air is drawn from the upper and lower outer chambers. When the piston rod moves forward, the one-way pressure-holding valves in the first and second chambers close, and the one-way pressure-holding valve in the third chamber opens, so that the third and second chambers are not connected to the first chamber, and air in the moving chamber is discharged to the outlet through the one-way pressure-holding valve in the third chamber.

[0019] Optionally, the piston rod and the motor are arranged perpendicular to each other, the free end of the piston rod is provided with a mounting hole, and an eccentric cam is installed at the output end of the motor, with the free end of the eccentric cam being plugged into the mounting hole.

[0020] Optionally, the fixing mechanism may also include a mounting plate, a mounting column, and a steering unit;

[0021] The steering unit is used to adjust the angle of the upper part of the device. It includes a steering ball and a fixed seat. The fixed seat is stacked and fixed in the lower shell, and the upper part of the steering ball extends into the lower shell and the fixed seat.

[0022] The lower adsorption plate is installed in the mounting plate, the mounting post passes through the lower adsorption plate and the steering ball and is connected to the fastener, and the permanent magnet ring is fixedly installed between the lower adsorption plate and the mounting plate.

[0023] Optionally, the fixing mechanism is a permanent magnet ring, which is fixedly installed on the bottom surface of the inner wall of the shell to attract and fix the device and the object together. The inner cavity unit includes a first mating part and a second mating part that are sealed together, with a space reserved between the two to form a venting chamber and a small chamber. The venting chamber and the small chamber are interconnected, and the upper outer cavity and the small chamber are interconnected.

[0024] The air extraction unit and the negative pressure sensing valve for sensing the air pressure change in the upper outer cavity are both installed in the housing. Both are connected to the chamber through air pipes, and both are electrically connected to the circuit board.

[0025] A one-way pressure-holding valve is fixedly installed in the chamber to prevent air from flowing back into the chamber from the extraction unit during the extraction process.

[0026] Optionally, the venting mechanism includes a valve stem return spring, a venting valve stem, and a button fixed in the venting chamber. The rear end of the venting valve stem is provided with an annular boss that extends into the venting chamber and abuts against the valve stem return spring. The front end of the venting valve stem is connected to the button, which is exposed on the side wall of the housing.

[0027] Optionally, the housing includes an upper shell, a middle shell, and a lower shell that cooperate with each other. An upper mounting plate is fixedly installed on the bottom surface of the upper shell, and a lower mounting plate is connected to the top of the lower shell.

[0028] The device is also equipped with a triggering mechanism, which includes a vacuum triggering component and / or a negative pressure sensing valve. The vacuum triggering component includes a travel rod and a travel switch. The travel switch is electrically connected to the circuit board, and the circuit board is electrically connected to the vacuum pumping unit. The upper end of the travel rod slides in engagement with the bottom of the upper suction plate, and its lower end passes through the upper shell and the upper mounting plate and is installed inside the shell by a spring. The middle part of the travel rod is provided with a contact point for engaging with the travel switch.

[0029] Optionally, the negative pressure sensing valve is electrically connected to the circuit board and communicates with the upper and / or lower outer chambers of the device via a pipe.

[0030] (III) Beneficial Effects

[0031] The beneficial effects of this invention are:

[0032] 1. The present invention provides a negative pressure adsorption device, wherein the air extraction mechanism is provided with an inner cavity unit and an air extraction unit. Each chamber of the inner cavity unit is provided with a one-way pressure holding valve along the air extraction direction. One end of the inner cavity unit is connected to the upper outer cavity, and the other end is connected to the air extraction unit. The air extraction unit extracts air from the upper outer cavity through the inner cavity unit, so that the upper outer cavity quickly forms a negative pressure environment to adsorb and fix objects, and the adsorption effect is better. Since the device is also provided with a venting mechanism, the adsorbed object can be easily removed by pressing the venting mechanism. Compared with the prior art, it can solve the technical problems that the existing adsorption structure cannot stably fix objects and that it is inconvenient to remove objects fixed on the adsorption structure.

[0033] 2. The upper adsorption plate of the device can be used to adsorb mobile phones or other smooth-surfaced items; a permanent magnet ring can be installed on the inner bottom surface of the device housing, so that the bottom surface of the device can be magnetically attached to the surface of the object, or a fixing mechanism with a directional unit can be connected and installed on the bottom surface of the housing. The bottom surface of the fixing mechanism is equipped with the lower adsorption plate and / or permanent magnet ring, so that the bottom surface of the device can be directionally attached to various object surfaces by magnetic attraction or negative pressure adsorption, which has a wider range of applications and is more practical.

[0034] 3. The inner cavity unit is equipped with an air release chamber and three small chambers. Each small chamber is equipped with a one-way pressure holding valve. When the lower adsorption plate is pressed against the wall, table, or other object surface, the air in the lower outer chamber passes through the air pipe, the lower air inlet, and the first chamber in sequence, and is then forced into the second and third chambers. This allows the lower adsorption plate to be easily initially installed on the wall or other object. Then, when a mobile phone or other object that needs to be fixed is pressed against the upper adsorption plate, the air in the upper outer chamber passes through the air pipe, the upper air inlet, and the second chamber in sequence, and is then forced into the third chamber. In other words, with the operator's installation operation of the device and the operation of placing objects such as mobile phones on the upper adsorption plate, the air in the upper and lower outer chambers can be initially released, so that less air needs to be extracted by the air extraction unit, the workload of the air extraction unit is reduced, and the device can achieve the negative pressure adsorption effect more quickly.

[0035] 4. The internal cavity unit is equipped with a venting chamber and three smaller chambers. When the piston rod moves backward to evacuate air, the one-way pressure-holding valves in the first and second smaller chambers open, while the one-way pressure-holding valve in the third smaller chamber closes, thus connecting the third and second chambers with the first chamber and evacuating air from the upper and lower outer chambers. When the piston rod moves forward, the one-way pressure-holding valves in the first and second smaller chambers close, while the one-way pressure-holding valve in the third smaller chamber opens, thus disconnecting the third and second chambers from the first chamber and venting air from the moving chambers to the outlet through the one-way pressure-holding valve in the third smaller chamber. By simultaneously evacuating the upper and lower outer chambers within the same internal cavity unit, the device achieves better evacuation performance and higher evacuation efficiency.

[0036] 5. The inner cavity unit includes a first mating component and a second mating component, which are sealed together to form a venting chamber and three smaller chambers. The venting chamber is equipped with a venting mechanism to release the device from adsorption and fixation of objects. Each smaller chamber is equipped with a one-way pressure holding valve, thus forming a relatively independent three-section cavity unit including a first cavity, a second cavity, and a third cavity. The first cavity is connected to the lower outer cavity through the lower air inlet, the second cavity is connected to the upper outer cavity, and the third cavity is connected to the movable cavity of the piston rod. The piston rod is driven by the air extraction mechanism to reciprocate in the movable cavity, drawing air from the upper and lower outer cavities into the third cavity, and then discharging it from the one-way pressure holding valve of the third smaller chamber to the air outlet. The entire air extraction mechanism has a simple and ingenious structure, high integration, and small space occupation, making the entire device more compact and adaptable to more usage environments.

[0037] 6. When the bottom of the device is not equipped with a lower adsorption plate, the inner cavity unit is equipped with only one venting chamber and one small chamber, and a one-way pressure holding valve is installed in the small chamber. When evacuating, the strip opening of the one-way pressure holding valve opens, and the evacuation unit sequentially evacuates the air from the small chamber, the venting chamber and the upper outer cavity, making the structure more streamlined.

[0038] 7. Due to the inclusion of a travel lever, limit switch, and negative pressure sensing valve, the travel lever contacts the limit switch to activate the suction mechanism. When the negative pressure sensing valve detects that the negative pressure in the upper and lower outer chambers is insufficient, it also sends a signal to the circuit board to activate the suction mechanism. The travel lever, limit switch, and negative pressure sensing valve can be used in conjunction with each other to activate the suction mechanism, or they can be used independently. This makes the device more powerful and its operation more stable. The mechanical control method accurately controls the suction mechanism, eliminating the need for various control chips on the circuit board, simplifying the circuit board structure, and making the device more energy-efficient.

[0039] 8. Due to the presence of a venting mechanism and venting chamber, pressing the button causes the annular protrusion of the venting valve stem to detach from the inner wall of the venting chamber, connecting the venting chamber to the outside, thereby restoring the air pressure in the venting chamber to normal. This allows for easy removal of objects adsorbed on the upper and lower adsorption plates, making operation simple. Attached Figure Description

[0040] Figure 1 This is a three-dimensional schematic diagram (upright position) of Embodiment 1 of a negative pressure adsorption device according to this application;

[0041] Figure 2 This is one of the cross-sectional schematic diagrams of an embodiment 1 of a negative pressure adsorption device of this application (a cross-sectional schematic diagram along the plane where the travel rod and the charging port are located);

[0042] Figure 3 This is an exploded view (inverted state) of a negative pressure adsorption device according to Embodiment 1 of the present invention;

[0043] Figure 4 This is a second cross-sectional schematic diagram of an embodiment 1 of the negative pressure adsorption device of the present invention (a cross-sectional schematic diagram along the axial direction of the vent valve rod);

[0044] Figure 5 This is a three-dimensional schematic diagram of the air extraction mechanism of Embodiment 1 of the negative pressure adsorption device of the present invention;

[0045] Figure 6 This is one of the exploded schematic diagrams of the air extraction mechanism in Embodiment 1 of the negative pressure adsorption device of the present invention;

[0046] Figure 7 This is a schematic cross-sectional view of the air extraction mechanism in Embodiment 1 of the negative pressure adsorption device of the present invention;

[0047] Figure 8 This is a second exploded schematic diagram of the air extraction mechanism in Embodiment 1 of the negative pressure adsorption device of the present invention;

[0048] Figure 9 for Figure 7 Enlarged view of point A in the middle;

[0049] Figure 10 This is a three-dimensional schematic diagram of a negative pressure adsorption device according to Embodiment 2 of the present invention;

[0050] Figure 11 This is an exploded view of Embodiment 2 of the negative pressure adsorption device of the present invention;

[0051] Figure 12 This is a bottom view schematic diagram of a negative pressure adsorption device according to Embodiment 2 of the present invention (lower shell not shown);

[0052] Figure 13 for Figure 12 A cross-sectional view of section BB.

[0053] [Explanation of Labels in the Attached Image]

[0054] 1. Upper adsorption plate; 11. Air extraction hole;

[0055] 2. Fixing mechanism; 21. Lower adsorption plate; 22. Permanent magnet ring; 23. Mounting plate; 24. Mounting column; 241. Air passage; 25. Steering unit; 251. Steering ball; 252. Fixing seat; 253. Resistance plate; 26. Fasteners;

[0056] 3. Housing; 31. Upper housing; 32. Middle housing; 33. Lower housing; 34. Upper mounting plate; 35. Wireless charging magnetic coil; 36. Lower mounting plate;

[0057] 4. Air extraction mechanism; 41. First mating part; 411. Valve stem through hole; 412. Upper air inlet; 413. Air outlet; 414. Protrusion;

[0058] 42. Second mating part; 420. Pump body interface; 421. Lower air inlet interface; 422. Connecting hole;

[0059] 43. One-way pressure holding valve; 431. Annular part; 432. Air nozzle;

[0060] 450. Air pump; 451. Motor; 452. Eccentric cam; 453. Moving chamber; 454. Piston rod;

[0061] 5. Venting mechanism; 51. Button; 52. Venting valve stem; 53. Valve stem return spring;

[0062] 61. Limit rod; 611. Contact; 62. Limit switch; 63. Negative pressure sensing valve; 64. Circuit board;

[0063] 7. Charging port;

[0064] 100, First chamber; 200, Second chamber; 300, Third chamber; 400, Venting chamber. Detailed Implementation

[0065] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this document, directional terms such as "upper" and "lower" are used interchangeably with other directional terms. Figure 1 With the orientation as a reference, the direction where the upper adsorption plate 1 is located is "up", the direction where the lower adsorption plate 21 is located is "down", the side where the button 51 is located is "front", and the opposite side is "rear".

[0066] This invention discloses a negative pressure adsorption device, comprising a housing, an upper adsorption plate mounted on the top surface of the housing, a fixing mechanism mounted on the bottom surface of the housing, an air extraction mechanism, and an air release mechanism installed within the housing. The air extraction mechanism includes an inner cavity unit and an air extraction unit. The inner cavity unit has an air release chamber and several small chambers connected in sequence inside. Each small chamber is equipped with a one-way pressure-holding valve along the air extraction direction. One end of the inner cavity unit is connected to the upper outer cavity formed by the upper adsorption plate and the adsorbed object, and the other end is connected to the air extraction unit. The air extraction unit extracts air from the upper outer cavity through the inner cavity unit to create a negative pressure environment in the upper outer cavity to adsorb and fix the object. Compared with the prior art, this invention solves the technical problems that existing adsorption structures cannot stably fix objects and are inconvenient to remove objects fixed to the adsorption structure.

[0067] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0068] Example 1:

[0069] Reference Figure 1 , Figure 3 and Figure 7 The present invention provides a negative pressure adsorption device, including a housing 3, an upper adsorption plate 1 installed on the top surface of the housing 3, a fixing mechanism 2 installed on the bottom surface of the housing 3, an air extraction mechanism 4 and an air release mechanism 5 installed in the housing 3.

[0070] The air extraction mechanism 4 includes an inner cavity unit and an air extraction unit. The inner cavity unit has an air release chamber 400 and three small chambers connected in sequence. Each small chamber is equipped with a one-way pressure holding valve 43 along the direction of air extraction. One end of the inner cavity unit is connected to the upper outer cavity formed by the upper adsorption plate 1 and the adsorbed object, and the other end is connected to the air extraction unit. The air extraction unit extracts air from the upper outer cavity through the inner cavity unit to create a negative pressure environment in the upper outer cavity to adsorb and fix the object.

[0071] See Figure 2 In order to achieve the adsorption function of the bottom surface of the housing 3, the fixing mechanism 2 includes a lower adsorption plate 21. The lower adsorption plate 21 is installed on the bottom surface of the housing 3. The lower adsorption plate 21 and another adsorbed object form a lower outer cavity. The lower outer cavity is connected to the interior of the inner cavity unit. That is, when the air extraction unit is working, it can simultaneously extract air from the upper outer cavity and the lower outer cavity so that both sides of the device have adsorption function.

[0072] See Figures 5 to 8 As a feasible solution, the inner cavity unit includes a first mating member 41 and a second mating member 42 arranged front and rear, which seal against each other to form a venting chamber 400 and three smaller chambers. The venting chamber 400 and the three smaller chambers are arranged side-by-side, with the first smaller chamber being closest to the venting chamber 400. The outer wall of the first mating member 41 extends forward relative to the second smaller chamber to form an upper air inlet 412. The upper air inlet 412 communicates with the second smaller chamber and is connected to the upper outer cavity via an air pipe.

[0073] Continue reading Figures 5 to 8The outer wall of the second mating part 42 extends rearward between the venting chamber 400 and the first small chamber to form a lower air inlet 421. The lower air inlet 421 is connected to the lower outer cavity through an air pipe. The lower air inlet 421 is provided with two connecting holes 422, one of which is connected to the venting chamber 400 and the other of which is connected to the first small chamber.

[0074] See Figure 7 and Figure 8 The outer wall of the second mating component 42 extends rearward between the second and third chambers to form a movable cavity 453. The movable cavity 453 has two connecting holes 422, one of which communicates with the second chamber, and the other with the third chamber. The third chamber has an air outlet 413 at its front side, through which air drawn from the upper and lower outer chambers by the extraction unit is discharged.

[0075] The upper air intake port 412 and the two connecting holes 422 therein are essentially combined to form a three-way port, as are the movable cavity 453 and the two connecting holes 422 therein.

[0076] See Figure 6 and Figure 7 The air extraction unit includes a piston rod 454 and a motor 451. The piston rod 454 has a "T"-shaped cross-section, with its front end slidably disposed in the movable cavity 453 and its rear end connected to the output end of the motor 451. A sealing ring is provided at the contact position between the piston rod 454 and the movable cavity 453 to improve the airtightness of the movable cavity 453.

[0077] See Figure 7 To save space, the piston rod 454 and the motor 451 are arranged perpendicularly to each other. The free end of the piston rod 454 has a mounting hole, and the output end of the motor 451 is equipped with an eccentric cam 452. The free end of the eccentric cam 452 is inserted into the mounting hole. The rotation of the motor 451 drives the eccentric cam 452 to rotate, and the eccentric cam 452 pulls the piston rod 454 to reciprocate back and forth.

[0078] See Figure 8 and Figure 9 As a feasible solution, the cross-section of the one-way pressure holding valve 43 is "V" shaped, which includes an annular part 431 and an air nozzle 432. The air nozzle 432 is provided with a strip-shaped opening that allows air to flow in one direction. The annular part 431 corresponds to the opening of the "V" and is the air inlet of the one-way pressure holding valve 43. The air nozzle 432 corresponds to the tip of the "V" and is the air outlet of the one-way pressure holding valve 43. For a more intuitive understanding, taking the first chamber 100 described later as an example, the air in the first chamber 100 first passes through the annular part 431 of the first one-way pressure holding valve 43, and then enters the second chamber 200 from the strip-shaped opening on its air nozzle 432.

[0079] The first one-way pressure holding valve 43 is fixedly installed in the first chamber, and the second one-way pressure holding valve 43 is fixedly installed in the second chamber. The annular portion 431 of each one-way pressure holding valve 43 is installed at the position where the first mating part 41 and the second mating part 42 meet. The air nozzles 432 of the first one-way pressure holding valve 43 and the third one-way pressure holding valve 43 are both arranged facing forward, while the air nozzle 432 of the second one-way pressure holding valve 43 is arranged facing backward, ensuring that air is smoothly extracted during evacuation.

[0080] Continue reading Figure 8 and Figure 9 Each one-way pressure holding valve 43 divides its corresponding chamber into a V-shaped area and a conical area. The conical area corresponds to the space enclosed by the inner wall of the one-way pressure holding valve 43 and the chamber, while the V-shaped area corresponds to the space enclosed by the outer wall of the one-way pressure holding valve 43 and the chamber. The venting chamber 400 is connected to the conical area of ​​the first chamber to form the first cavity 100. The V-shaped area of ​​the first chamber and the conical area of ​​the second chamber form the second cavity 200. The V-shaped area of ​​the second chamber, the movable cavity 453, and the conical area of ​​the third chamber form the third cavity 300. The first mating part 41 and the second mating part 42 seal against each other to form a venting chamber 400 and three small chambers. The venting chamber 400 is equipped with a venting mechanism 5 to release the device from adsorption and fixation of objects. Each small chamber is equipped with a one-way pressure holding valve 43, so that the inner cavity unit forms a relatively independent three-section cavity including a first cavity 100, a second cavity 200 and a third cavity 300. The first cavity 100 is connected to the lower outer cavity through the lower air inlet 421, the second cavity 200 is connected to the upper outer cavity, and the third cavity 300 is connected to the movable cavity 453 of the piston rod 454. The piston rod 454 is driven by the air extraction mechanism 4 to move back and forth in the movable cavity 453, drawing air from the upper and lower outer cavities to the third cavity 300 and discharging it from the one-way pressure holding valve 43 of the third small chamber to the air outlet 413. The entire air extraction mechanism 4 has a simple and ingenious structure, high integration, and small space occupation, making the whole device more compact and adaptable to more usage environments.

[0081] When the piston rod 454 moves backward to draw air, the one-way pressure holding valve 43 in the first and second chambers opens, and the one-way pressure holding valve 43 in the third chamber closes, so that the third chamber 300, the second chamber 200 and the first chamber 100 are connected, and air is drawn from the upper and lower outer chambers. When the piston rod 454 moves forward, the one-way pressure holding valve 43 in the first and second chambers closes, and the one-way pressure holding valve 43 in the third chamber opens, so that the third chamber 300, the second chamber 200 and the first chamber 100 are not connected to each other, and air in the movable chamber 453 is discharged to the outlet 413 through the one-way pressure holding valve 43 in the third chamber.

[0082] Because the inner cavity unit is equipped with an air venting chamber 400 and three smaller chambers, each with a one-way pressure-holding valve 43, when the lower adsorption plate 21 is pressed against a wall, tabletop, or other object surface, the air in the lower outer cavity passes sequentially through the air pipe, lower air inlet 421, and first chamber 100, and is then forced into the second chamber 200 and third chamber 300. A negative pressure environment is initially formed in the lower outer cavity, allowing the lower adsorption plate 21 to be easily installed on a wall or other object. Then, when a mobile phone or other object requiring fixation presses against the upper adsorption plate 1, the upper… The air in the outer cavity passes through the air pipe, the upper air inlet 412, and the second cavity 200 in sequence, and is then forced into the third cavity 300, so that a negative pressure environment is initially formed in the upper outer cavity, allowing objects to be adsorbed onto the upper adsorption plate 1. On the other hand, with the operator's installation operation of the device and the operation of pressing objects such as mobile phones onto the upper adsorption plate 1, the air in the upper and lower outer cavities is initially discharged, so that less air needs to be extracted by the air extraction unit, the workload of the air extraction unit is reduced, and the device can achieve the negative pressure adsorption effect more quickly.

[0083] participate Figure 9 Since the three one-way pressure-holding valves 43 are all set in the direction of airflow, and generally the lower adsorption plate 21 of the device is first adsorbed and fixed to the surface of an object such as a table or wall, and then the mobile phone or other object is installed on the upper adsorption plate 1 of the device, when the lower adsorption plate 21 is pressed against the object, the air in the lower outer cavity is squeezed and passes through the air pipe, the lower air inlet 421 and the first cavity 100 in sequence, and is pressed into the second cavity 200. It cannot flow back from the second cavity 200 to the lower outer cavity, and the lower outer cavity can initially reach the negative pressure condition to achieve the initial fixation of the device. When the upper adsorption plate 1 is pressed against another object, the air in the upper outer cavity passes through the air pipe, the upper air inlet 412 and the second cavity 200 in sequence and is pressed into the third cavity 300. The air that has been pressed into the third cavity 300 will not flow back, and the air in the upper outer cavity will not enter the first cavity 100, so as to avoid breaking the initial negative pressure condition reached in the lower outer cavity during the process of fixing the device to the wall, table or other object, and they do not interfere with each other. When the piston rod 454 moves backward, the first and second one-way pressure holding valves 43 open their strip openings due to the pulling force of the piston rod 454, while the strip opening of the second one-way pressure holding valve 43 remains closed, drawing air from each chamber. When the piston rod 454 moves forward, the strip openings of the first two one-way pressure holding valves 43 close, and the strip opening of the third one-way pressure holding valve 43 opens, expelling the drawn air. There is no backflow of air, and the air extraction operation is highly efficient.

[0084] As a feasible solution, the fixing mechanism 2 also includes a mounting plate 23, a permanent magnet ring 22, a mounting column 24, and a steering unit 25.

[0085] See Figure 2The steering unit 25 includes a steering ball 251, a fixed seat 252, and a resistance plate 253. The fixed seat 252 is stacked and fixed in the lower shell 33. The upper part of the steering ball 251 extends into the lower shell 33 and the fixed seat 252. A resistance plate 253 is provided between the steering ball 251, the lower shell 33, and the fixed seat 252 to provide friction for the rotation of the steering ball 251. An air passage 241 for communicating with the lower outer cavity is provided axially inside the mounting post 24. The lower adsorption plate 21 is installed in the mounting plate 23. The mounting post 24 passes through the lower adsorption plate 21 and the steering ball 251 and is connected to the fastener 26. Therefore, the upper part of the device can rotate on the steering ball 251, allowing the user to rotate it to a suitable operating angle. The permanent magnet ring 22 is fixedly installed between the lower adsorption plate 21 and the mounting plate 23, so that the device can be fixed to a desktop, wall or other position by adsorption, or fixed to a magnetic position by magnetic attraction, which can adapt to more application scenarios and make it more practical.

[0086] In this embodiment 1, the lower adsorption plate 21 and the permanent magnet ring 22 in the fixing mechanism 2 can be installed selectively, or both can be installed.

[0087] See Figure 4 and Figure 5 The venting mechanism 5 includes a valve stem return spring 53, a venting valve stem 52, and a button 51, all fixed in the venting chamber 400. The venting valve stem 52 is a round rod with an annular boss at its rear end. The first mating part 41 has a valve stem through hole 411. The front end of the venting valve stem 52 extends from the valve stem through hole 411 and is connected to the button 51, which is exposed on the side wall of the housing 3. The rear end of the venting valve stem 52 is placed in the venting chamber 400. The rear wall of the annular boss abuts against the valve stem return spring 53, and the front wall of the annular boss seals against the inner wall of the venting chamber 400, closing the gap between the valve stem through hole 411 and the venting valve stem 52. The diameter of the annular boss > the diameter of the valve stem through hole 411 > the diameter of the venting valve stem 52.

[0088] It should be noted that the first chamber 100 is connected to the lower outer chamber via the lower air inlet 421. When button 51 is pressed, outside air first enters the first chamber 100 and the lower outer chamber, and then enters the second chamber 200 and the upper outer chamber, thereby releasing the negative pressure adsorption effect of the lower adsorption plate 21 and the upper adsorption plate 1. This allows the device to be detached from objects such as walls or desktops, and the objects adsorbed on the device to be removed. To improve the user experience and conform to people's usage habits, the first chamber 100 is only connected to the lower outer chamber, and not to the upper outer chamber.

[0089] In actual use, a sealing ring is installed between the front wall of the annular boss and the inner wall of the venting chamber 400 to increase the airtightness of the device.

[0090] See Figure 3 As a feasible solution, the housing 3 includes an upper housing 31, a middle housing 32, and a lower housing 33 that cooperate with each other. An upper mounting plate 34 is fixedly installed on the bottom surface of the upper housing 31, and a lower mounting plate 36 is connected to the top of the lower housing 33. The space between the upper mounting plate 34 and the lower mounting plate 36 is used to install the air extraction mechanism 4, the air release mechanism 5, and the triggering mechanism.

[0091] See Figure 2 and Figure 5 The triggering mechanism includes a vacuum trigger assembly and / or a negative pressure sensing valve 63. The vacuum trigger assembly includes a travel rod 61 and a limit switch 62. The limit switch 62 is electrically connected to a circuit board 64. The circuit board 64 is fixedly connected to the upper mounting plate 34 and electrically connected to the vacuum pumping unit. The negative pressure sensing valve 63 is electrically connected to the circuit board 64 and communicates with the upper and lower outer chambers through pipes. It senses changes in air pressure within the chambers, converts these changes into electrical signals, and transmits them to the circuit board 64, thereby activating or deactivating the vacuum pumping unit. The negative pressure sensing valve 63 is a conventional mechanical sensing device.

[0092] See Figure 2 The upper end of the stroke rod 61 slides with the bottom of the upper adsorption plate 1, and its lower end passes through the upper shell 31 and the upper mounting plate 34, and is installed inside the shell 3 by a spring. The middle part of the stroke rod 61 is provided with a contact 611 for contacting and cooperating with the limit switch 62.

[0093] When an object such as a mobile phone is placed on the upper adsorption plate 1 and pressed, the travel lever 61 moves downward, the contact 611 slides past the limit switch 62, and the circuit board 64 activates the suction unit to evacuate the upper and lower outer chambers, achieving negative pressure adsorption. When the external force is removed, the travel lever 61 returns to its original position due to the spring's return force. When the suction unit evacuates until the air pressure in the upper and lower outer chambers reaches a preset value range, the negative pressure sensing valve 63 converts this change into an electrical signal and transmits it to the circuit board 64, which then controls the suction unit to stop working. When the air pressure in the upper and lower outer chambers does not meet the preset value range, the negative pressure sensing valve 63 converts this change into an electrical signal and transmits it to the circuit board 64, which then controls the suction unit to start working.

[0094] It should be noted that, in this application, the vacuum trigger assembly composed of the travel lever 61 and the travel switch 61 can work in conjunction with the negative pressure sensing valve 63, or one of them can be used separately.

[0095] See Figure 4 and Figure 6 A wireless charging magnetic coil 35 is provided between the upper shell 31 and the upper mounting plate 34, and a charging port 7 is installed on the outer side wall of the shell 3. Therefore, the power supply installed in the device can be charged by wired or wireless means.

[0096] Example 2:

[0097] See Figures 10 to 13 Based on Example 1, the fixing mechanism 2 was changed and the setting of the inner cavity unit was adapted.

[0098] See Figure 11 Specifically, the fixing mechanism 2 is a permanent magnet ring 22, and the lower shell 33 includes a shell cover and a shell ring. The permanent magnet ring 22 is fixedly installed between the shell cover and the shell ring to attract and fix the device to the object, that is, the steering unit 25 and the lower adsorption plate 21 are no longer provided.

[0099] Since the fixing mechanism 2 does not have a lower adsorption plate 21, the inner cavity unit does not need to consider the problem of evacuating the lower outer cavity formed by the lower adsorption plate 21. Therefore, the inner cavity unit is adaptively optimized.

[0100] See Figure 13 Specifically, the inner cavity unit includes a first mating part 41 and a second mating part 42 arranged vertically, which are sealed together and have reserved space to form a venting chamber 400 and a small chamber. The venting chamber 400 and the small chamber are interconnected, and the upper outer cavity is in communication with the small chamber. A one-way pressure holding valve 43 is fixedly installed in the small chamber, dividing the small chamber into a conical area and a V-shaped area. Air can flow from the conical area to the V-shaped area during evacuation, ensuring that air does not flow back into the small chamber from the evacuation unit during evacuation. The conical area, the venting chamber 400, and the upper outer cavity are in communication with each other, as are the V-shaped area, the pump body interface 420 located on the second mating part 42, and the evacuation pump 450.

[0101] The venting chamber 400 and the venting mechanism 5 remain unchanged and will not be described in detail here.

[0102] See Figure 13 The first mating part 41 and the upper mounting plate 34 are integrally formed. The upper mounting plate 34 has an upper air inlet 412 on its top surface in the middle. The upper end of the upper air inlet 412 is inserted into the suction hole 11, communicating with the upper outer cavity. A protrusion 414 is provided at the middle position of the end of the upper air inlet 412, allowing one side of the upper air inlet 412 to connect to the conical area of ​​the small chamber, and the other side to connect to the vent chamber 400, essentially forming a three-way hole. Furthermore, the protrusion 414 facilitates the fixed installation of the one-way pressure holding valve 43 between the first mating part 41 and the second mating part 42.

[0103] In actual production applications, the first mating part 41 and the upper mounting plate 34 can also be set separately.

[0104] See Figure 11The air extraction unit and the negative pressure sensing valve 63 for sensing changes in air pressure in the upper outer cavity are both installed in the housing 3. Both are connected to the chamber via a three-way air pipe, and both are electrically connected to the circuit board 64. The air extraction unit is an existing air pump 450.

[0105] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0106] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0107] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0108] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0109] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A negative pressure adsorption device, characterized in that, It includes a housing (3), an upper adsorption plate (1) installed on the top surface of the housing (3), a fixing mechanism (2) installed on the bottom surface of the housing (3), an air extraction mechanism (4) installed in the housing (3), and an air release mechanism (5). The air extraction mechanism (4) includes an inner cavity unit and an air extraction unit. The inner cavity unit includes a first mating part (41) and a second mating part (42), which are sealed together to form an air release chamber (400) and three small chambers. The outer wall of the second mating part (42) extends backward to form a movable chamber (453). The air release chamber (400) communicates with the first small chamber to form a first chamber (100). The first small chamber communicates with the second small chamber to form a second chamber (200). The second small chamber, the movable chamber (453), and the third small chamber communicate to form a third chamber (300). Each chamber is equipped with a one-way pressure holding valve (43) along the direction of air extraction. One end of the inner cavity unit is connected to the upper outer cavity formed by the upper adsorption plate (1) and the adsorbed object, and the other end is connected to the air extraction unit. The air extraction unit extracts air from the upper outer cavity through the inner cavity unit to create a negative pressure environment in the upper outer cavity to adsorb and fix the object. The air extraction unit includes a piston rod (454). When the piston rod (454) moves to the rear, the one-way pressure holding valves (43) in the first and second chambers open, and the one-way pressure holding valve (43) in the third chamber closes, so that the first chamber (100), the second chamber (200) and the third chamber (300) are connected to each other and external air is extracted. When the piston rod (454) moves to the front, the one-way pressure holding valves (43) in the first and second chambers close, and the one-way pressure holding valve (43) in the third chamber open, so that the first chamber (100), the second chamber (200) and the third chamber (300) are not connected to each other, and the air in the active chamber (453) is discharged.

2. The negative pressure adsorption device as described in claim 1, characterized in that: The fixing mechanism (2) includes a lower adsorption plate (21) and / or a permanent magnet ring (22). The lower adsorption plate (21) is installed on the bottom surface of the housing (3). The lower adsorption plate (21) and another adsorbed object form a lower outer cavity. The outer wall of the first mating part (41) extends forward to form an upper air inlet (412), which is connected to the second chamber and to the upper outer cavity through a trachea; The outer wall of the second mating part (42) extends rearward to form a lower air inlet (421), which is connected to the lower outer cavity through an air pipe. The lower air inlet (421) is connected to the first small chamber and the venting chamber (400) respectively. The active chamber (453) is connected to the second chamber and the third chamber respectively, and the third chamber has an air outlet (413) at the front. The air extraction unit also includes a motor (451), one end of the piston rod (454) is slidably disposed in the movable cavity (453), and the other end is connected to the output end of the motor (451).

3. The negative pressure adsorption device as described in claim 2, characterized in that: The cross section of the one-way pressure holding valve (43) is "V" shaped, and its tip is provided with a strip opening that allows one-way air flow.

4. The negative pressure adsorption device as described in claim 3, characterized in that: Each one-way pressure holding valve (43) divides the corresponding chamber into a V-shaped area and a conical area. The conical area corresponds to the space enclosed by the inner wall of the one-way pressure holding valve (43) and the chamber. The V-shaped area corresponds to the space enclosed by the outer wall of the one-way pressure holding valve (43) and the chamber. The venting chamber (400) is connected to the conical area of ​​the first chamber to form a first cavity (100). The V-shaped area of ​​the first chamber and the conical area of ​​the second chamber form a second cavity (200). The V-shaped area of ​​the second chamber, the movable cavity (453), and the conical area of ​​the third chamber form a third cavity (300).

5. The negative pressure adsorption device as described in claim 4, characterized in that: The piston rod (454) is arranged perpendicularly to the motor (451). The free end of the piston rod (454) is provided with a mounting hole. An eccentric cam (452) is installed at the output end of the motor (451). The free end of the eccentric cam (452) is inserted into the mounting hole.

6. The negative pressure adsorption device as described in claim 5, characterized in that: The fixing mechanism (2) also includes a mounting plate (23), a mounting column (24), and a steering unit (25); The steering unit (25) is used to adjust the angle of the upper part of the device. It includes a steering ball (251) and a fixed seat (252). The fixed seat (252) is stacked and fixed in the lower shell (33) of the housing (3). The upper part of the steering ball (251) extends into the lower shell (33) and the fixed seat (252). The lower adsorption plate (21) is installed in the mounting plate (23), the mounting post (24) passes through the lower adsorption plate (21) and the steering ball (251) and is connected to the fastener (26), and the permanent magnet ring (22) is fixedly installed between the lower adsorption plate (21) and the mounting plate (23).

7. The negative pressure adsorption device as described in claim 6, characterized in that: The fixing mechanism (2) is a permanent magnet ring (22). The permanent magnet ring (22) is fixedly installed on the bottom surface of the inner wall of the housing (3) to attract and fix the device and the object together. The inner cavity unit includes a first fitting part (41) and a second fitting part (42) with a sealing fit. A space is reserved between the two to form a venting chamber (400) and a small chamber. The venting chamber (400) and the small chamber are interconnected. The upper outer cavity is interconnected with the small chamber. The air extraction unit and the negative pressure sensing valve (63) for sensing the air pressure change of the upper outer cavity are both installed in the housing (3). Both are connected to the small chamber through a three-way air pipe, and both are electrically connected to the circuit board (64). The one-way pressure valve (43) is fixedly installed in the small chamber to prevent air from flowing back into the small chamber from the air extraction unit during the air extraction process.

8. The negative pressure adsorption device as described in claim 7, characterized in that: The venting mechanism (5) includes a valve stem return spring (53), a venting valve stem (52), and a button (51) fixed in the venting chamber (400). The rear end of the venting valve stem (52) is provided with an annular boss that extends into the venting chamber (400) and abuts against the valve stem return spring (53). The front end of the venting valve stem (52) is connected to the button (51), and the button (51) is exposed on the side wall of the housing (3).

9. The negative pressure adsorption device as described in claim 8, characterized in that: The housing (3) includes an upper shell (31), a middle shell (32) and a lower shell (33) that cooperate with each other. An upper mounting plate (34) is fixedly installed on the bottom surface of the upper shell (31), and a lower mounting plate (36) is connected to the top of the lower shell (33). The device is also provided with a triggering mechanism, which includes a vacuum triggering component and / or a negative pressure sensing valve (63). The vacuum triggering component includes a travel rod (61) and a travel switch (62). The travel switch (62) is electrically connected to a circuit board (64), and the circuit board (64) is electrically connected to the vacuum pumping unit. The upper end of the travel rod (61) slides with the bottom of the upper suction plate (1), and its lower end passes through the upper shell (31) and the upper mounting plate (34), and is installed inside the shell (3) by a spring. The middle part of the travel rod (61) is provided with a contact point (611) for contacting and cooperating with the travel switch (62).

10. The negative pressure adsorption device as described in claim 9, characterized in that: The negative pressure sensing valve (63) is electrically connected to the circuit board (64) and communicates with the upper outer cavity and / or lower outer cavity of the device.

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