Negative pressure adsorption device

Abstract

The utility model belongs to the technical field of connectors, and relates to a negative pressure adsorption device which comprises a shell, an upper adsorption disc installed on the top face of the shell, a fixing mechanism installed on the bottom face of the shell, an air exhaust mechanism installed in the shell and an air exhaust mechanism installed in the shell. The air exhaust mechanism comprises an inner cavity unit and an air exhaust unit, an air release chamber and a plurality of small chambers which are sequentially communicated are arranged in the inner cavity unit, each small chamber is provided with a one-way pressure retaining valve in the air exhaust direction, each one-way pressure retaining valve comprises an annular air inlet and an air outlet nozzle, and each air outlet nozzle is provided with a strip-shaped opening allowing air to flow unidirectionally. The upper adsorption disc and an adsorbed object form an upper outer cavity, and the upper adsorption disc is provided with an air exhaust hole communicated with the upper outer cavity; one end of the inner cavity unit is communicated with the air exhaust hole through an air pipe, and the other end is communicated with the air exhaust unit; the negative pressure adsorption device has the beneficial effect that the technical problem that the air exhaust efficiency of an existing negative pressure adsorption device is not ideal is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to a negative pressure adsorption device. Background Art

[0002] The existing negative pressure adsorption device generally includes a housing, a suction cup for adsorbing a mobile phone or other objects, a cavity arranged in the housing, and an air extraction mechanism. The suction cup and the object to be adsorbed form an adsorption cavity. One end of the cavity is usually communicated with the adsorption cavity through a pipeline, and the other end is communicated with the air extraction mechanism. By starting the air extraction mechanism, the cavity and the adsorption cavity are evacuated in sequence, so that negative pressure is formed in the adsorption cavity to achieve the function of adsorbing objects.

[0003] However, the air extraction efficiency of the existing adsorption device is not very ideal, and the air extraction speed is slow. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the above-mentioned disadvantages and deficiencies of the prior art, the utility model provides a negative pressure adsorption device, which solves the technical problem that the air extraction efficiency of the existing negative pressure adsorption device is not ideal.

[0006] (2) Technical Solutions

[0007] In order to achieve the above purpose, the main technical solutions adopted by the utility model include:

[0008] An embodiment of the utility model provides a negative pressure adsorption device, which includes a housing, an upper adsorption disk installed on the top surface of the housing, a fixing mechanism installed on the bottom surface of the housing, an air extraction mechanism and an air release mechanism installed in the housing;

[0009] The air extraction mechanism includes an inner cavity unit and an air extraction unit. A gas release chamber and a plurality of small chambers are sequentially communicated inside the inner cavity unit. Each small chamber is provided with a one-way pressure maintaining valve along the air extraction direction. The one-way pressure maintaining valve includes an annular air inlet and an air outlet nozzle, and a strip-shaped opening allowing air to flow unidirectionally is arranged on the air outlet nozzle;

[0010] The upper adsorption disk and the object to be adsorbed form an upper outer cavity, and the upper adsorption disk is provided with air extraction holes communicating with the upper outer cavity;

[0011] One end of the inner cavity unit is communicated with the air extraction holes through an air pipe, and the other end is communicated with the air extraction unit.

[0012] Optionally, the cross-section of the one-way pressure maintaining valve is "V" shaped.

[0013] Optionally, the fixing mechanism includes a lower adsorption disk and / or a permanent magnet ring. The lower adsorption disk is installed on the bottom surface of the housing, and the lower adsorption disk and another object to be adsorbed form a lower outer cavity;

[0014] The inner cavity unit includes a first fitting and a second fitting, which are in sealing contact with each other to form an air release chamber and three small chambers in sequence. The first small chamber is adjacent to the air release chamber. The outer wall of the first fitting extends forward to form an upper air inlet interface. One end of the upper air inlet interface is connected to the upper outer cavity through a trachea, and the other end communicates with the second small chamber;

[0015] The outer wall of the second fitting extends backward to form a lower air inlet interface. One end of the lower air inlet interface is connected to the lower outer cavity through a trachea, and the other end communicates with the first small chamber and the air release chamber respectively;

[0016] The outer wall of the second fitting extends backward to form a movable cavity, which communicates with the second small chamber and the third small chamber respectively. The third small chamber is provided with an air outlet at the front side position;

[0017] The air extraction unit includes a piston rod and a motor. One end of the piston rod is slidably arranged in the movable cavity, and the other end is connected to the output end of the motor.

[0018] Optionally, each one-way pressure-holding valve divides the corresponding small 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 small chamber, and the V-shaped area corresponds to the space enclosed by the outer wall of the one-way pressure-holding valve and the small chamber. The air release chamber communicates with the conical area of the first small chamber to form a first cavity. The V-shaped area of the first small chamber and the conical area of the second small chamber communicate to form a second cavity. The V-shaped area of the second small chamber, the movable cavity and the conical area of the third small chamber communicate to form a third cavity.

[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. The free end of the eccentric cam is inserted and connected to the mounting hole.

[0020] Optionally, the housing includes a mutually cooperating upper shell, a middle shell and a lower shell. The bottom surface of the upper shell is fixedly installed with an upper mounting plate, and a lower mounting plate is connected above the lower shell;

[0021] A triggering mechanism is further provided in the device. The triggering mechanism includes a vacuum triggering component and / or a negative pressure induction valve. The vacuum triggering component includes a travel rod and a travel switch. The travel switch is electrically connected to a circuit board, and the circuit board is electrically connected to the air extraction unit. The upper end of the travel rod is slidably matched with the bottom of the upper suction disc. Its lower end passes through the upper shell and the upper mounting plate and is fixedly installed inside the housing through a spring. A contact for contact cooperation with the travel switch is arranged in the middle of the travel rod.

[0022] Optionally, the negative pressure induction valve is electrically connected to the circuit board and communicates with the upper outer cavity and / or the lower outer cavity of the device.

[0023] Optionally, the fixing mechanism further includes a mounting disc, a mounting post and a steering unit;

[0024] The steering unit includes a steering sphere, a fixed seat, and a resistance piece. The fixed seat is superposed and fixed in the lower housing. The upper part of the steering sphere extends into the lower housing and the fixed seat, and a resistance piece is provided at the position between the steering sphere, the lower housing, and the fixed seat.

[0025] The lower suction disc is installed in the mounting disc. The mounting post passes through the lower suction disc and the steering sphere and is connected to the fastener. The permanent magnet ring is fixedly installed at the position between the lower suction disc and the mounting disc.

[0026] Optionally, the fixing mechanism is a permanent magnet ring, which is fixedly installed on the inner bottom wall surface of the housing. The inner cavity unit includes a first fitting and a second fitting that are hermetically fitted, and a space is reserved between them to form a gas release chamber and a small chamber. The gas release chamber and the small chamber communicate with each other, and the upper outer cavity communicates with the small chamber.

[0027] The air extraction unit and the negative pressure induction valve for sensing the air pressure change in the upper outer cavity are both installed in the housing. Both of them are connected to the small chamber through a three-way air pipe, and they are respectively electrically connected to the circuit board.

[0028] A one-way pressure maintaining valve is fixedly installed in the small chamber to prevent air from flowing back from the air extraction unit into the small chamber during the air extraction process.

[0029] Optionally, the gas release mechanism includes a valve rod return spring, a gas release valve rod, and a button fixed in the gas release chamber. An annular boss is provided at the rear end of the gas release valve rod, which extends into the gas release chamber and abuts against the valve rod return spring. The front end of the gas release valve rod extends out from the valve rod through hole of the first fitting and is connected to the button. The button is exposed on the side wall surface of the housing. The diameter of the annular boss > the diameter of the valve rod through hole > the diameter of the gas release valve rod.

[0030] (III) Beneficial Effects

[0031] The beneficial effects of the present utility model are as follows:

[0032] 1. For a negative pressure adsorption device of the present invention, one end of the inner cavity unit communicates with the upper outer cavity, and the other end communicates with the air extraction unit. The air extraction unit extracts the air in the upper outer cavity through the inner cavity unit. Since each small chamber of the inner cavity unit is provided with a one-way pressure maintaining valve along the air extraction direction, the one-way pressure maintaining valve includes an annular air inlet and an air outlet nozzle, and a strip-shaped opening allowing air to flow unidirectionally is provided on the air outlet nozzle, which can avoid the occurrence of air backflow during air extraction, greatly improving the air extraction efficiency of the device. Compared with the prior art, it can solve the technical problem of low air extraction efficiency of the existing adsorption structure.

[0033] 2. The upper suction disc of the device can be used to adsorb mobile phones or other items with smooth surfaces; a permanent magnet ring can be installed on the inner bottom surface of the device's housing, so that the bottom surface of the device is magnetically adsorbed on the object surface, or a fixing mechanism with a steering unit is connected and installed on the bottom surface of the housing, and a lower suction disc and / or a permanent magnet ring is installed on the bottom surface of the fixing mechanism, so that the bottom surface of the device is rotatably installed on various object surfaces by magnetic adsorption or negative pressure adsorption, with a wider application range and greater practicality.

[0034] 3. The inner cavity unit is provided with an air release chamber and three small chambers, and a one-way pressure maintaining valve is installed in each small chamber. When the lower suction disc is pressed against the wall surface, the tabletop or other object surfaces, the air in the lower outer cavity sequentially passes through the air pipe, the lower air inlet interface and the first chamber, and is pressed into the second chamber and the third chamber, so that the lower suction disc can be easily and preliminarily installed on objects such as the wall surface. Then, when a mobile phone or other object to be fixed is pressed against the upper suction disc, the air in the upper outer cavity sequentially passes through the air pipe, the upper air inlet interface and the second chamber, and is pressed into the third chamber. That is to say, by means of the installation operation of the device by the operator and the operation of placing an object such as a mobile phone on the upper suction disc, the air in the upper outer cavity and the lower outer cavity can be preliminarily discharged, so that the amount of air to be extracted by the air extraction unit is less, the workload of the air extraction unit is smaller, and the device can achieve the negative pressure adsorption effect faster.

[0035] 4. The inner cavity unit is provided with an air release chamber and three small chambers. When the piston rod moves backward to extract air, the strip-shaped openings of the one-way pressure maintaining valves in the first small chamber and the second small chamber are opened, and the strip-shaped opening of the one-way pressure maintaining valve in the third small chamber is closed, so that the third chamber, the second chamber and the first chamber are communicated, and the air in the upper outer cavity and the lower outer cavity is extracted. When the piston rod moves forward, the strip-shaped openings of the one-way pressure maintaining valves in the first small chamber and the second small chamber are closed, and the strip-shaped opening of the one-way pressure maintaining valve in the third small chamber is opened, so that the third chamber, the second chamber and the first chamber are not connected, and the air in the moving chamber is discharged to the outside of the air outlet through the strip-shaped opening of the one-way pressure maintaining valve in the third small chamber; the air extraction operation of the upper outer cavity and the lower outer cavity is simultaneously completed in the same inner cavity unit, and the air extraction effect of the device is better and the air extraction efficiency is high.

[0036] 5. The inner cavity unit includes a first fitting and a second fitting, which are hermetically abutted to form a deflation chamber and three small chambers. A deflation mechanism is installed in the deflation chamber to release the adsorption and fixation of the device on an object. A one-way pressure-holding valve is installed in each small chamber, so that the inner cavity unit forms a three-section cavity including a first cavity, a second cavity, and a third cavity that are relatively independent. Among them, the first cavity is connected to the lower outer cavity through a lower air inlet interface, the second cavity is connected to the upper outer cavity, and the third cavity is connected to the moving cavity of the piston rod. The piston rod is driven by an air extraction mechanism to reciprocate in the moving cavity, pumping the air in the upper outer cavity and the lower outer cavity into the third cavity and discharging it to the air outlet through the one-way pressure-holding valve in the third small chamber. The entire air extraction mechanism has a simple and delicate structure, high integration, and occupies a small space, making the entire device more compact and adaptable to more usage environments.

[0037] 6. When the lower adsorption disc is not provided at the bottom of the device, the inner cavity unit is provided with only one deflation chamber and one small chamber, and a one-way pressure-holding valve is installed in the small chamber. During air extraction, the bar-shaped opening of the one-way pressure-holding valve opens, and the air extraction unit sequentially extracts the air in the small chamber, the deflation chamber, and the upper outer cavity, with a more streamlined structure.

[0038] 7. Due to the setting of the travel rod, travel switch, and negative pressure induction valve, when the contact of the travel rod touches the travel switch, the air extraction mechanism is started to work; when the negative pressure induction valve senses that the negative pressure in the upper outer cavity and the lower outer cavity does not meet the conditions, it will also feedback a signal to the circuit board to start the air extraction mechanism to work; the travel rod, travel switch, and negative pressure induction valve can either cooperate with each other to start the air extraction mechanism or be used alone to start the air extraction mechanism, making the device more powerful and the working stability stronger; the mechanical control method is used to accurately control the operation of the air extraction mechanism, and there is no need to set various control chips on the circuit board, making the circuit board structure simpler and the device more energy-saving and power-saving.

[0039] 8. Due to the setting of the deflation mechanism and the deflation chamber, by pressing the button, the annular boss of the deflation valve rod is separated from the inner wall of the deflation chamber to connect the deflation chamber and the outside, so that the air pressure in the deflation chamber returns to normal, and the object adsorbed on the upper adsorption disc and the lower adsorption disc can be easily removed, with simple operation. Description of the Drawings

[0040] Figure 1 Schematic three-dimensional diagram of the device of Embodiment 1 of a negative pressure adsorption device of the present application (in the upright state);

[0041] Figure 2 One of the schematic cross-sectional diagrams of Embodiment 1 of a negative pressure adsorption device of the present application (cross-sectional diagram along the plane where the travel rod and the charging port are located);

[0042] Figure 3 Schematic exploded diagram of the device of Embodiment 1 of a negative pressure adsorption device of the present invention (in the inverted state);

[0043] Figure 4 The second schematic diagram of the device cross-section of Embodiment 1 of a negative pressure adsorption device of the present invention (the cross-sectional schematic diagram along the axial direction of the air release valve rod);

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

[0045] Figure 6 The first exploded schematic diagram of the air extraction mechanism of Embodiment 1 of a negative pressure adsorption device of the present invention;

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

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

[0048] Figure 9 It is Figure 7 The enlarged schematic diagram at position A in

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

[0050] Figure 11 The exploded schematic diagram of the device of Embodiment 2 of a negative pressure adsorption device of the present invention;

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

[0052] Figure 13 It is Figure 12 The cross-sectional schematic diagram at B - B in

[0053]

Explanation of the reference numerals

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

[0055] 2. Fixing mechanism; 21. Lower adsorption disc; 22. Permanent magnet ring; 23. Mounting disc; 24. Mounting column; 241. Air passage; 25. Steering unit; 251. Steering sphere; 252. Fixed seat; 253. Resistance piece; 26. Fastener;

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

[0057] 4. Air extraction mechanism; 41. First fitting; 411. Valve rod through-hole; 412. Upper air inlet interface; 413. Air outlet; 414. Protrusion;

[0058] 42. Second fitting; 420. Pump body interface; 421. Lower air inlet interface; 422. Communication hole;

[0059] 43. One-way pressure maintaining valve; 431. Annular air inlet; 432. Air outlet nozzle;

[0060] 450. Air extraction pump; 451. Motor; 452. Eccentric cam; 453. Movable cavity; 454. Piston rod;

[0061] 5. Air release mechanism; 51. Button; 52. Air release valve rod; 53. Valve rod return spring;

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

[0063] 7. Charging port;

[0064] 100. First chamber; 200. Second chamber; 300. Third chamber; 400. Air release chamber. Detailed implementation mode

[0065] To better explain the present invention for easy understanding, the present invention will be described in detail below in conjunction with the drawings through specific implementation modes. Among them, the orientation nouns such as "upper" and "lower" mentioned in this article are Figure 1 oriented with reference to, with the direction where the upper suction disc 1 is located as "upper", the direction where the lower suction disc 21 is located as "lower", the side where the button 51 is located as the "front side", and the opposite side as the "rear side".

[0066] A negative pressure adsorption device proposed in an embodiment of the present invention includes a housing, an upper suction disc installed on the top surface of the housing, a fixing mechanism installed on the bottom surface of the housing, an air extraction mechanism and an air release mechanism installed in the housing; the air extraction mechanism includes an inner cavity unit and an air extraction unit. Inside the inner cavity unit, there are an air release chamber and several small chambers that are sequentially connected. Each small chamber is installed with a one-way pressure maintaining valve along the air extraction direction. The one-way pressure maintaining valve includes an annular air inlet and an air outlet nozzle. The air outlet nozzle is provided with a strip-shaped opening that allows air to flow unidirectionally; the upper suction disc forms an upper outer cavity with the adsorbed object, and the upper suction disc is provided with air extraction holes that communicate with the upper outer cavity; one end of the inner cavity unit is connected to the air extraction holes through an air pipe, and the other end is connected to the air extraction unit; its beneficial effect is to solve the technical problem that the air extraction efficiency of the existing negative pressure adsorption device is not ideal.

[0067] To better understand the above technical solution, the exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the 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 by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more clear and thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0068] Embodiment 1:

[0069] Referring to Figure 1 、 Figure 3 and Figure 7 ,an embodiment of the present invention provides a negative pressure adsorption device, which 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 and an air release mechanism 5 installed in the housing 3.

[0070] Among them, the air extraction mechanism 4 includes an inner cavity unit and an air extraction unit. Inside the inner cavity unit, there are a gas release chamber 400 and three small chambers that are sequentially connected. A one-way pressure retaining valve 43 is provided in each small chamber along the air extraction direction. One end of the inner cavity unit is communicated with the upper outer cavity formed by the upper adsorption plate 1 and the object to be adsorbed, and the other end 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 as to form a negative pressure environment in the upper outer cavity to adsorb and fix the object.

[0071] Referring to Figure 2 ,in order to realize the adsorption function on 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 forms a lower outer cavity with another object to be adsorbed. The lower outer cavity is communicated with the inside of the inner cavity unit. That is, when the air extraction unit works, it can extract the air in both the upper outer cavity and the lower outer cavity at the same time, so that both sides of the device have an adsorption function.

[0072] Referring to Figures 5 to 8 ,as a feasible solution, the inner cavity unit includes a first fitting 41 and a second fitting 42 arranged front and back. The two are in sealed contact to form the gas release chamber 400 and three small chambers. Among them, the gas release chamber 400 and the three small chambers are arranged side by side, and the first small chamber is close to the gas release chamber 400. The outer wall of the first fitting 41 extends forward at a position opposite to the second small chamber to form an upper air inlet interface 412. The upper air inlet interface 412 is communicated with the second small chamber and is connected to the upper outer cavity through a trachea.

[0073] Continuing to refer to Figures 5 to 8, the outer wall of the second fitting 42 extends backward at the position between the air release chamber 400 and the first small chamber to form a lower air inlet interface 421. The lower air inlet interface 421 is connected to the lower outer cavity through a trachea. Two communication holes 422 are provided in the lower air inlet interface 421. One of the communication holes 422 is communicated with the air release chamber 400, and the other communication hole 422 is communicated with the first small chamber.

[0074] Refer to Figure 7 and Figure 8 , the outer wall of the second fitting 42 extends backward at the position between the second small chamber and the third small chamber to form a movable chamber 453. Two communication holes 422 are provided in the movable chamber 453. One of the communication holes 422 is communicated with the second small chamber, and the other communication hole 422 is communicated with the third small chamber. An air outlet 413 is provided at the front side position of the third small chamber. The air in the upper outer cavity and the lower outer cavity extracted by the air extraction unit is discharged from the air outlet 413.

[0075] The upper air inlet interface 412 and the two communication holes 422 provided therein substantially form a three-way hole, and the same is true for the movable chamber 453 and the two communication holes 422 provided therein.

[0076] Refer to Figure 6 and Figure 7 , the air extraction unit includes a piston rod 454 and a motor 451. The cross-section of the piston rod 454 is "T"-shaped. Its front end is slidably arranged in the movable chamber 453, and the rear end is 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 chamber 453 to improve the airtightness of the movable chamber 453.

[0077] Refer to Figure 7 , in order to save space, the piston rod 454 and the motor 451 are arranged perpendicular to each other. An installation hole is provided at the free end of the piston rod 454. An eccentric cam 452 is installed at the output end of the motor 451. The free end of the eccentric cam 452 is inserted and connected to the installation hole. When the motor 451 rotates, the eccentric cam 452 rotates, and the eccentric cam 452 pulls the piston rod 454 to reciprocate back and forth.

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

[0079] The first one-way pressure-holding valve 43 is fixedly installed in the first small chamber, and the second one-way pressure-holding valve 43 is fixedly installed in the second small chamber. The annular air inlets 431 of each one-way pressure-holding valve 43 are installed at the position where the first fitting 41 and the second fitting 42 are joined. Among them, the air outlet nozzles 432 of the first one-way pressure-holding valve 43 and the third one-way pressure-holding valve 43 are both arranged forward, and the air outlet nozzle 432 of the second one-way pressure-holding valve 43 is arranged backward to ensure that air is smoothly pumped out during air extraction.

[0080] Continue to refer to Figure 8 and Figure 9 , Each one-way pressure-holding valve 43 divides the corresponding small 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 small chamber, and the V-shaped area corresponds to the space enclosed by the outer wall of the one-way pressure-holding valve 43 and the small chamber. The air release chamber 400 communicates with the conical area of the first small chamber to form the first chamber 100. The V-shaped area of the first small chamber and the conical area of the second small chamber form the second chamber 200. The V-shaped area of the second small chamber, the movable chamber 453, and the conical area of the third small chamber form the third chamber 300. The first fitting 41 and the second fitting 42 are hermetically abutted to form the air release chamber 400 and the three small chambers. The air release chamber 400 is installed with an air release mechanism 5 for releasing the adsorption and fixation of the device to an object. One one-way pressure-holding valve 43 is installed in each small chamber, so that the inner cavity unit forms a relatively independent three-section cavity including the first chamber 100, the second chamber 200, and the third chamber 300. Among them, the first chamber 100 communicates with the lower outer cavity through the lower air inlet interface 421, the second chamber 200 communicates with the upper outer cavity, and the third chamber 300 communicates with the movable chamber 453 of the piston rod 454. The piston rod 454 is driven by the air extraction mechanism 4 to reciprocate back and forth in the movable chamber 453, pumping the air in the upper outer cavity and the lower outer cavity into the third chamber 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 delicate structure, high integration, and occupies a small space, making the entire device more compact and adaptable to more usage environments.

[0081] When the piston rod 454 moves backward for air extraction, the strip-shaped openings of the one-way pressure-holding valves 43 in the first and second small chambers open, and the strip-shaped opening of the one-way pressure-holding valve 43 in the third small chamber closes, so that the third chamber 300 and the second chamber 200 communicate with the first chamber 100, and the air in the upper outer chamber and the lower outer chamber is extracted. When the piston rod 454 moves forward, the strip-shaped openings of the one-way pressure-holding valves 43 in the first and second small chambers close, and the strip-shaped opening of the one-way pressure-holding valve 43 in the third small chamber opens, so that the third chamber 300, the second chamber 200 and the first chamber 100 are not communicated with each other, and the air in the movable chamber 453 is discharged to the outside of the air outlet 413 through the strip-shaped opening of the one-way pressure-holding valve 43 in the third small chamber.

[0082] Since the inner cavity unit is provided with an air release chamber 400 and three small chambers, and a one-way pressure-holding valve 43 is installed in each small chamber. When the lower suction cup 21 is pressed against the wall surface, the tabletop or other object surfaces, the air in the lower outer chamber sequentially passes through the air pipe, the lower air inlet interface 421 and the first chamber 100, and is pressed into the second chamber 200 and the third chamber 300. A negative pressure environment is initially formed in the lower outer chamber, so that the lower suction cup 21 can be easily installed on objects such as the wall surface. Then, when a mobile phone or other object to be fixed presses on the upper suction cup 1, the air in the upper outer chamber sequentially passes through the air pipe, the upper air inlet interface 412 and the second chamber 200, and is pressed into the third chamber 300, so that a negative pressure environment is initially formed in the upper outer chamber, so that the object can be adsorbed on the upper suction cup 1; on the other hand, with the help of the operator's installation operation of the device and the operation of pressing and placing objects such as mobile phones on the upper suction cup 1, the air in the upper outer chamber and the lower outer chamber is initially discharged, so that the amount of air to be extracted by the air extraction unit is less, the workload of the air extraction unit is smaller, and the device can achieve the negative pressure adsorption effect faster.

[0083] Participate Figure 9, since the three one-way pressure-holding valves 43 are all arranged along the direction of air flow, and generally, the lower suction disc 21 of the device is first adsorbed and fixed to the surface of an object such as a desktop or a wall surface, and then a mobile phone or other object is installed on the upper suction disc 1 of the device. When the lower suction disc 21 is pressed against the object, the air in the lower outer cavity is squeezed and sequentially passes through the air pipe, the lower air inlet interface 421, and the first cavity 100, and is pressed into the second cavity 200, and cannot flow back from the second cavity 200 to the lower outer cavity. The lower outer cavity can initially reach the negative pressure condition to achieve the preliminary fixation of the device. When the upper suction disc 1 is pressed against another object, the air in the upper outer cavity sequentially passes through the air pipe, the upper air inlet interface 412, and the second cavity 200 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, avoiding breaking the negative pressure condition initially reached in the lower outer cavity during the process of fixing the device to an object such as a wall surface or a desktop, without interference. When the piston rod 454 moves backward, the first and second one-way pressure-holding valves 43 open the strip-shaped openings thereon due to the pulling force of the piston rod 454, and the strip-shaped opening of the second one-way pressure-holding valve 43 remains closed, extracting the air in each cavity. When the piston rod 454 moves forward, the strip-shaped openings of the first two one-way pressure-holding valves 43 are closed, and the strip-shaped opening of the third one-way pressure-holding valve 43 is opened, discharging the extracted air, without the phenomenon of air backflow, and the air extraction work is efficient.

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

[0085] Refer to Figure 2 , wherein the steering unit 25 includes a steering sphere 251, a fixed seat 252, and a resistance piece 253. The fixed seat 252 is superposed and fixed in the lower housing 33. The upper part of the steering sphere 251 extends into the lower housing 33 and the fixed seat 252, and a resistance piece 253 is provided at the position between the steering sphere 251, the lower housing 33, and the fixed seat 252 for providing frictional force for the rotation of the steering sphere 251. An air passage 241 for communicating with the lower outer cavity is axially arranged in the mounting post 24. The air passage 241 is connected to the lower air inlet interface 421 through an air pipe. The lower suction disc 21 is installed in the mounting plate 23. The mounting post 24 passes through the lower suction disc 21 and the steering sphere 251 and is connected to the fastener 26. Therefore, the upper part of the device can rotate on the steering sphere 251. The permanent magnet ring 22 is fixedly installed at the position between the lower suction disc 21 and the mounting plate 23, so that the device can be fixedly installed at positions such as a desktop or a wall surface through adsorption, and can also be fixedly installed at a magnetic position through magnetic attraction, adapting to more application scenarios and having better practicability.

[0086] In the first embodiment, the lower suction disc 21 and the permanent magnet ring 22 in the fixing mechanism 2 can be selectively installed, or both can be selected for installation.

[0087] Refer to Figure 4 and Figure 5 Figure 5 , the air release mechanism 5 includes a valve stem return spring 53, an air release valve stem 52, and a button 51 fixedly arranged in the air release chamber 400. The air release valve stem 52 has a round rod structure, and an annular boss is provided at its rear end. The first fitting 41 is provided with a valve stem through hole 411. The front end of the air release valve stem 52 extends out from the valve stem through hole 411 and is connected to the button 51. The button 51 is exposed on the side wall surface of the housing 3. The rear end of the air release valve stem 52 is placed in the air release chamber 400. The rear wall surface of the annular boss abuts against the valve stem return spring 53, and the front wall of the annular boss is used to seal and abut against the inner wall of the air release chamber 400 to close the gap between the valve stem through hole 411 and the air release valve stem 52. The diameter of the annular boss > the diameter of the valve stem through hole 411 > the diameter of the air release valve stem 52.

[0088] It should be noted that the first chamber 100 is communicated with the lower outer chamber through the lower air inlet interface 421. When the button 51 is pressed, the 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, successively releasing the negative pressure adsorption effects of the lower suction cup 21 and the upper suction cup 1, so that the device can be detached from an object such as a wall or a tabletop, and the object adsorbed on the device can be detached. In order to improve the user experience and conform to people's usage habits, the first chamber 100 is only communicated with the lower outer chamber, rather than with the upper outer chamber.

[0089] During the actual use process, a sealing rubber ring is provided between the front wall surface of the annular boss and the inner wall of the air release chamber 400 to increase the airtightness of the device.

[0090] Refer to Figure 3 Figure 3 , as a feasible solution, the housing 3 includes a mutually cooperating upper housing 31, a middle housing 32, and a lower housing 33. 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 above 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 trigger mechanism.

[0091] Refer to Figure 2 and Figure 5 Figure 5 , the trigger mechanism includes a vacuum trigger assembly and / or a negative pressure induction valve 63. The vacuum trigger assembly includes a travel rod 61 and a travel switch 62. The travel switch 62 is electrically connected to the circuit board 64. The circuit board 64 is fixedly connected to the upper mounting plate 34 and is electrically connected to the air extraction unit. The negative pressure induction valve 63 is electrically connected to the circuit board 64 and is communicated with the upper outer chamber and the lower outer chamber through a pipeline to sense the air pressure change in the chamber, convert the air pressure change into an electrical signal and transmit it to the circuit board 64, so as to start or close the air extraction unit. The negative pressure induction valve 63 is an existing mechanical induction device.

[0092] Refer toFigure 2 The upper end of the travel rod 61 is in sliding fit with the bottom of the upper suction disc 1. Its lower end passes through the upper shell 31 and the upper mounting plate 34 and is installed inside the housing 3 through a spring. A contact 611 for contact fit with the travel switch 62 is provided in the middle of the travel rod 61.

[0093] When an object such as a mobile phone is placed on the upper suction disc 1 and pressed, the travel rod 61 moves downward, and the contact 611 slides past the travel switch 62. The circuit board 64 activates the air extraction unit to extract air from the upper outer cavity and the lower outer cavity, realizing the negative pressure adsorption function. When the external force is removed, the travel rod 61 resets due to the resilience of the spring. When the air extraction unit extracts air until the air pressure in the upper outer cavity and the lower outer cavity reaches the preset value range, the negative pressure induction valve 63 converts this change into an electrical signal and transmits it to the circuit board 64, and the circuit board 64 controls the air extraction unit to stop working. When the air pressure in the upper outer cavity and the lower outer cavity does not meet the preset value range, the negative pressure induction valve 63 converts this change into an electrical signal and transmits it to the circuit board 64, and the circuit board 64 controls the air extraction unit to start working.

[0094] It should be noted that in this application, the vacuum trigger assembly composed of the travel rod 61 and the travel switch 61 can cooperate with the negative pressure induction valve 63, or either one can be used.

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

[0096] Embodiment 2:

[0097] Refer to Figures 10 to 13 Based on Embodiment 1, the fixing mechanism 2 is changed, and the setting of the inner cavity unit is adaptively adjusted.

[0098] Refer to Figure 11 Specifically, the fixing mechanism 2 is a permanent magnetic ring 22. The lower shell 33 includes a shell cover and a shell ring. The permanent magnetic ring 22 is fixedly installed at the position between the shell cover and the shell ring for adsorbing and fixing the device to an object together, that is, the steering unit 25 and the lower suction disc 21 are no longer provided.

[0099] Since the fixing mechanism 2 does not have the lower suction disc 21, the inner cavity unit does not need to consider the problem of extracting air from the lower outer cavity formed by the lower suction disc 21. Therefore, the inner cavity unit is adaptively optimized.

[0100] Refer to Figure 13, specifically, the inner cavity unit includes a first fitting 41 and a second fitting 42 arranged vertically. They are hermetically fitted with each other, and a space is reserved to form a deflation chamber 400 and a small chamber. The deflation chamber 400 and the small chamber communicate with each other, and the upper outer cavity and the small chamber communicate with each other. 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 air extraction, ensuring that air does not flow back from the air extraction unit into the small chamber during the air extraction process. The conical area, the deflation chamber 400, and the upper outer cavity communicate with each other, and the V-shaped area, the pump body interface 420 provided on the second fitting 42, and the air extraction pump 450 communicate with each other.

[0101] The deflation chamber 400 and the deflation mechanism 5 remain unchanged and will not be elaborated here.

[0102] Refer to Figure 13 , the first fitting 41 and the upper mounting plate 34 are integrally provided. On the top surface of the middle part of the upper mounting plate 34, an upper air inlet interface 412 is provided. The upper end of the upper air inlet interface 412 is inserted into the air extraction hole 11 and communicates with the upper outer cavity. In the middle position at the end of the upper air inlet interface 412, a protrusion 414 is provided, enabling one side of the upper air inlet interface 412 to communicate with the conical area of the small chamber and the other side to communicate with the deflation chamber 400. In essence, it forms a three-way through hole. In addition, the setting of the protrusion 414 also facilitates the fixed installation of the one-way pressure-holding valve 43 at the position between the first fitting 41 and the second fitting 42.

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

[0104] Refer to Figure 11 , the air extraction unit and the negative pressure induction valve 63 for sensing the air pressure change in 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 together. The air extraction unit is an existing air extraction pump 450.

[0105] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0106] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0107] In the present invention, unless otherwise clearly defined or limited, when the first feature is "on" or "under" the second feature, it may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, when the first feature is "above", "over" and "on top of" the second feature, it may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. When the first feature is "under", "beneath" and "underneath" the second feature, it may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

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

[0109] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, 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 comprises a shell (3), an upper adsorption plate (1) mounted on the top surface of the shell (3), a fixing mechanism (2) mounted on the bottom surface of the shell (3), and an air extraction mechanism (4) and an air release mechanism (5) mounted in the shell (3); The air extraction mechanism (4) comprises an inner cavity unit and an air extraction unit, wherein the inner cavity unit is provided with an air discharge chamber (400) and a plurality of small chambers which are connected in sequence, each small chamber being provided with a one-way pressure-maintaining valve (43) along the direction of air extraction, the one-way pressure-maintaining valve (43) comprising an annular air inlet (431) and an air outlet nozzle (432), and the air outlet nozzle (432) is provided with a strip opening which allows one-way air flow; The upper adsorption plate (1) and the adsorbed object form an upper outer cavity, and the upper adsorption plate (1) is provided with an air extraction hole (11) that penetrates the upper outer cavity; One end of the inner cavity unit is connected to the air extraction hole (11) via an air pipe, and the other end thereof is connected to the air extraction unit.

2. A negative pressure adsorption device according to claim 1, characterized in that: The cross section of the one-way pressure-maintaining valve (43) is in a "V" shape.

3. A negative pressure adsorption device according to claim 1, characterized in that: The fixing mechanism (2) comprises a lower adsorption plate (21) and / or a permanent magnetic ring (22), the lower adsorption plate (21) being mounted on the bottom surface of the shell (3), and the lower adsorption plate (21) and another adsorbed object forming a lower outer cavity; The inner cavity unit comprises a first matching piece (41) and a second matching piece (42), which are sealed and abutted to form a deflation chamber (400) and three small chambers in sequence, wherein the first small chamber is adjacent to the deflation chamber (400), and the outer wall of the first matching piece (41) extends forward to form an upper air inlet interface (412), one end of the upper air inlet interface (412) is connected to the upper outer cavity through an air pipe, and the other end is connected to the second small chamber; The outer wall of the second fitting (42) extends backward to form a lower air inlet interface (421), one end of the lower air inlet interface (421) is connected to the lower outer cavity through an air pipe, and the other end thereof is respectively connected to the first small chamber and the air release chamber (400); The outer wall of the second matching piece (42) extends backward to form an active cavity (453), and the active cavity (453) is communicated with the second small chamber and the third small chamber respectively, and the third small chamber is provided with an air outlet (413) at the front side; The air extraction unit comprises a piston rod (454) and a motor (451); one end of the piston rod (454) is slidably disposed in the movable chamber (453), and the other end is connected to the output end of the motor (451).

4. A negative pressure adsorption device as claimed in claim 3, characterized in that: Each one-way pressure-maintaining valve (43) divides the corresponding small 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-maintaining valve (43) and the small chamber, and the V-shaped area corresponds to the space enclosed by the outer wall of the one-way pressure-maintaining valve (43) and the small chamber. The degassing chamber (400) is connected with the conical area of ​​the first small chamber to form a first chamber (100). The V-shaped area of ​​the first small chamber and the conical area of ​​the second small chamber are connected to form a second chamber (200). The V-shaped area of ​​the second small chamber, the active chamber (453) and the conical area of ​​the third small chamber are connected to form a third chamber (300).

5. A negative pressure adsorption device according to claim 4, characterized in that: The piston rod (454) and the motor (451) are arranged perpendicular to each other, the free end of the piston rod (454) is provided with a mounting hole, the output end of the motor (451) is installed with an eccentric cam (452), and the free end of the eccentric cam (452) is plug-connected to the mounting hole.

6. A negative pressure adsorption device according to claim 5, characterized in that: The housing (3) comprises an upper shell (31), a middle shell (32) and a lower shell (33) which cooperate with each other; an upper mounting plate (34) is fixedly mounted 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 trigger mechanism, which includes a vacuum trigger assembly and / or a negative pressure sensing valve (63). The vacuum trigger assembly 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 unit. The upper end of the travel rod (61) is slidably matched with the bottom of the upper adsorption disk (1), and the lower end thereof passes through the upper shell (31) and the upper mounting plate (34), and is fixedly mounted inside the shell (3) by a spring. The middle part of the travel rod (61) is provided with a contact (611) for contacting and matching with the travel switch (62).

7. A negative pressure adsorption device according to claim 6, characterized in that: The negative pressure sensing valve (63) is electrically connected to the circuit board (64) and is in communication with the upper external cavity and / or the lower external cavity of the device.

8. A negative pressure adsorption device according to claim 7, characterized in that: The fixing mechanism (2) further comprises a mounting plate (23), a mounting column (24) and a steering unit (25); The steering unit (25) comprises a steering ball (251), a fixed seat (252) and a resistance sheet (253); the fixed seat (252) is overlapped 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); and the resistance sheet (253) is provided at a position between the steering ball (251), the lower shell (33) and the fixed seat (252); The lower adsorption plate (21) is installed in the mounting plate (23), the mounting column (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 at a position between the lower adsorption plate (21) and the mounting plate (23).

9. A negative pressure adsorption device according to claim 1, characterized in that: The fixing mechanism (2) is a permanent magnet ring (22), and the permanent magnet ring (22) is fixedly mounted on the inner bottom wall of the shell (3); the inner cavity unit comprises a first mating piece (41) and a second mating piece (42) that are sealed together, and a space is reserved between the two to form a degassing chamber (400) and a small chamber, and the degassing chamber (400) and the small chamber are interconnected, and the upper outer cavity and the small chamber are interconnected; The air extraction unit and the negative pressure sensing valve (63) for sensing the air pressure change in the upper outer chamber 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) respectively; The one-way pressure-maintaining valve (43) is fixedly installed in the small chamber to prevent air from flowing back from the air extraction unit into the small chamber during the air extraction process.

10. A negative pressure adsorption device according to claim 9, characterized in that: The deflation mechanism (5) comprises a valve stem reset spring (53) fixed in the deflation chamber (400), a deflation valve stem (52) and a button (51); a rear end of the deflation valve stem (52) is provided with an annular boss, which extends into the deflation chamber (400) and abuts against the valve stem reset spring (53); a front end of the deflation valve stem (52) extends from the valve stem through hole (411) of the first mating piece (41) and is connected to the button (51); the button (51) is exposed on the side wall of the shell (3); the diameter of the annular boss is greater than the diameter of the valve stem through hole (411) and the diameter of the deflation valve stem (52).

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