Electric suction cup

Abstract

The utility model relates to an electric suction cup, and belongs to the technical field of photographic equipment installation. The device comprises a shell, a suction cup, an air exhaust system and a starting unit, the suction cup is fixed to the end face of the shell, and a second through hole in the suction cup corresponds to a first through hole in the shell. The air exhaust system is arranged in the shell and communicated with the suction cup cavity of the suction cup to form a closed air channel. The starting unit comprises a starting piece, a trigger magnet and a Hall element; the starting piece can move in the axis direction of the first through hole and the second through hole. One end of the starting piece extends into the suction cup cavity, and a trigger magnet is arranged at the other end of the starting piece; and the Hall element is arranged in the shell and is in signal communication with the air exhaust system. When the external supporting face is attracted to the suction cup, the trigger magnet moves along with the starting piece and generates a changing magnetic field relative to the Hall element, the Hall element outputs a signal used for controlling starting or closing of an air exhaust system, and therefore the technical problems that a traditional electric suction cup is low in response speed and low in feedback precision are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photography equipment installation technical field, especially in kind electric sucking disc. BACKGROUND

[0002] Photography and video equipment such as flash, light supplement, flash guide, light effect accessory, etc. often need to be fixed on the wall, desktop or specific plane in actual use process, so as to satisfy different shooting requirements. But the traditional fixed installation device cannot realize the stable fixation of photography and video equipment on the wall, desktop or specific plane.

[0003] In order to solve the above problems, a kind of electric sucking disc capable of realizing quick adsorption and release on various planes is gradually applied. The electric sucking disc usually adopts mechanical button trigger mechanism to control the work of its internal air pump, so as to form vacuum negative pressure in the sucking disc area, thereby realizing the stable adsorption of equipment.

[0004] However, the mechanical button trigger mechanism in the traditional electric sucking disc adopts physical contact mode, which has slow response speed, low feedback precision and large operation noise in use, and it is difficult to meet the requirements of control sensitivity and real-time of electric sucking disc, which limits the application environment expansion of electric sucking disc. INVENTION CONTENTS

[0005] One purpose of the utility model is to solve the technical problems of slow response speed, low feedback precision and large operation noise of the traditional electric sucking disc.

[0006] In order to solve the above technical problems, the present application provides an electric sucking disc, which comprises: a shell, the end face of which is provided with a first through hole penetrating through the inside of the shell; a sucking disc having a sucking disc cavity with one end open; the sucking disc is provided with a second through hole penetrating through the sucking disc cavity; the sucking disc is fixed on the end face of the shell, and the second through hole corresponds to the first through hole; an air extraction system is arranged in the shell and communicates with the sucking disc cavity to form a closed air channel; the air extraction system is used to extract the gas in the sucking disc cavity, so that the electric sucking disc can be adsorbed to the external supporting surface; a starting unit comprising a starting piece, a trigger magnet and a hall element; the starting piece is arranged in the first through hole and the second through hole and can move along the axis direction of the first through hole and the second through hole; one end of the starting piece extends into the sucking disc cavity, and the other end of the starting piece is provided with the trigger magnet; the hall element is arranged in the shell and signal-communicates with the air extraction system; when the external supporting surface is adsorbed on the sucking disc and abuts against the starting piece, the starting piece can move to the inside of the shell along the axis of the first through hole and the second through hole; the trigger magnet moves with the starting piece and generates a changing magnetic field relative to the hall element, so that the hall element outputs a signal for controlling the starting or closing of the air extraction system.

[0007] In some examples of the present application, the shell comprises a bottom shell, a top cover and a gas chamber partition; the bottom shell forms a receiving cavity with an open top inside; the top cover is arranged at the opening of the receiving cavity of the bottom shell to seal the top of the bottom shell; the bottom wall of the receiving cavity of the bottom shell is provided with a first convex rib and a second convex rib protruding; the first convex rib and the second convex rib are arranged at intervals around the first through hole; the gas chamber partition covers the top of the first convex rib and the second convex rib to form a gas chamber.

[0008] In some examples of the present application, the starting member comprises a cap body and a column; the column is arranged in the first through hole and the second through hole; the cap body is a resilient member and is fixed on the column; the cap body is embedded in the gas chamber formed by the first convex rib and the second convex rib of the shell; the end surface of the cap body away from the column is provided with a mounting groove, and the trigger magnet is arranged in the mounting groove; when the external supporting surface is adsorbed on the suction disc and presses against the column, the column moves towards the inside of the shell, the cap body elastically deforms, and then the trigger magnet on the cap body approaches the Hall element.

[0009] In some examples of the present application, the first convex rib of the bottom shell is provided with an air hole; the cap body is provided with an air inlet corresponding to the air hole; the suction disc cavity can be communicated with the gas chamber in the shell through the gap between the column and the first through hole and the second through hole, the air hole and the air inlet, so that the air extraction system can extract the gas in the suction disc cavity communicated with the gas chamber.

[0010] In some examples of the present application, the air extraction system comprises an air pump, an air pipe and a pressure relief member; the air pump is communicated with the gas chamber in the shell through the air pipe, so that the air pump can extract the gas in the gas chamber; the pressure relief member is arranged on the air pipe, and the pressure relief member can communicate the gas chamber with the external environment to balance the gas pressure of the gas chamber and the external environment.

[0011] In some examples of the present application, the air extraction system comprises an electric control board, which is in signal communication with the air pump; the Hall element is arranged on the electric control board and is electrically connected with the electric control board; the electric control board is prearranged with position data of a plurality of starting members; when the external supporting surface abuts against the starting member, the trigger magnet on the starting member approaches the Hall element; the Hall element can obtain the position of the trigger magnet on the starting member, transmit the position information to the electric control board, compare the position data prearranged in the electric control board with the position information, and control the air pump to start or stop according to the comparison result.

[0012] In some examples of the present application, the air extraction system comprises an air pressure sensor; the air pressure sensor is arranged on the air pipe and in signal communication with the control panel; the air pressure sensor is configured to detect air pressure information in the air chamber and transmit the air pressure information to the control panel, and the control panel is configured to control the air pump to extract air according to the air pressure information.

[0013] In some examples of the present application, the air extraction system further comprises a charging interface and a built-in battery, the built-in battery is electrically connected with the control panel, and the charging interface is arranged on the control panel; the charging interface is configured to be connected with an external power line, so that the external power source can charge the built-in battery through the control panel.

[0014] In some examples of the present application, the electrostatic chuck comprises a wireless transmission module arranged on the control panel and electrically connected with the control panel; the wireless transmission module is configured to be in signal communication with an external terminal, so that the external terminal can obtain the working state of the electrostatic chuck.

[0015] In some examples of the present application, the Hall element is a single-pole Hall switch; the control panel is pre-provided with an initial trigger position and a cut-off trigger position; when the trigger magnet is at the initial trigger position of the starting piece, the trigger magnet generates a magnetic field strength that can be sensed by the Hall element and outputs a signal to start the air extraction system to extract air; when the trigger magnet is between the initial trigger position and the cut-off trigger position of the starting piece, the trigger magnet maintains a magnetic field strength that can be sensed by the Hall element and outputs a signal to maintain the air extraction system to extract air; when the trigger magnet moves towards the inside of the shell and passes the cut-off trigger position, the magnetic field strength generated by the trigger magnet is lower than the magnetic field strength threshold that can be sensed by the Hall switch, and the trigger magnet outputs a signal to close the air extraction system to stop extracting air.

[0016] In some examples of the present application, the Hall element is a bipolar Hall switch, and the trigger magnet comprises a first trigger magnet and a second trigger magnet arranged at intervals along the moving direction of the starting piece; the magnetic poles of the first trigger magnet and the second trigger magnet facing the Hall element are opposite;

[0017] When the first trigger magnet on the starting piece moves to correspond to the Hall element, the first trigger magnet generates a magnetic field strength that can be sensed by the Hall element and outputs a signal to start the air extraction system to extract air; when the starting piece moves towards the inside of the shell so that the second magnet on the starting piece corresponds to the Hall element, the second trigger magnet generates a magnetic field strength that can be sensed by the Hall element and outputs a signal to close the air extraction system to stop extracting air.

[0018] In some examples of the present application, the electric suction disc further comprises a base arranged on the end of the starting member towards the inside of the shell; the trigger magnet is embedded in the base, and the base is formed with an opening exposing the trigger magnet on the side towards the Hall element.

[0019] In some examples of the present application, the shell is provided with a connecting portion on the end surface away from the suction disc, which is used for connecting and fixing with photographic equipment.

[0020] From the above technical solution, the beneficial effects of the present application are:

[0021] The present application provides an electric suction disc, which comprises a shell, a suction disc arranged on the shell, an air extraction system arranged in the shell, and a starting unit. The starting unit comprises a starting member, a trigger magnet, and a Hall element. When the suction disc is adsorbed on an external supporting surface, the starting member moves along the axis direction of the through hole under the abutment of the supporting surface, and drives the trigger magnet to approach the Hall element arranged in the shell, so that the Hall element can accurately perceive the change of the magnetic field and quickly control the start and stop of the air extraction system. The whole process does not need manual key operation, greatly improving the convenience and automation degree of use. At the same time, since the Hall element adopts the non-contact magnetic induction principle, the wear, noise and service life problems caused by frequent mechanical action of the traditional key structure are avoided, which helps to improve the stability and reliability of the device, and is especially suitable for photographic and video application scenarios with high requirements for quiet environment and high-frequency operation. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the electric suction disc in some embodiments.

[0023] Figure 2 It is Figure 1 a schematic diagram of the exploded structure of the electric suction disc in some embodiments.

[0024] Figure 3 It is Figure 1 a schematic diagram of the cross-sectional structure of the electric suction disc in some embodiments.

[0025] Figure 4 It is Figure 1 a schematic diagram of the exploded cross-sectional structure of the electric suction disc in some embodiments.

[0026] Figure 5 It is Figure 2 a schematic diagram of the mounting structure of the air extraction system of the electric suction disc in some embodiments.

[0027] Figure 6 It is Figure 5 a schematic diagram of the structure of the bottom shell of the electric suction disc in some embodiments.

[0028] Figure 7 It is Figure 6A cross-sectional structural schematic diagram of the middle electrostatic chuck bottom shell.

[0029] Figure 8 For Figure 3 A three-dimensional structural schematic diagram of the starting member of the middle electrostatic chuck.

[0030] Figure 9 For Figure 3 Another angle structural schematic diagram of the starting member of the middle electrostatic chuck.

[0031] Figure 10 A cross-sectional structural schematic diagram of the middle electrostatic chuck in another embodiment.

[0032] The reference signs are explained as follows:

[0033] 100, electrostatic chuck; 10, shell; 11, bottom shell; 111, first convex rib; 112, second convex rib; 113, air chamber; 114, air hole; 115, first through hole; 12, top cover; 121, connecting part; 13, air chamber partition; 20, suction cup; 21, suction cup cavity; 22, second through hole; 30, air extraction system; 31, air pump; 311, air nozzle; 32, air pipe; 321, first air pipe; 322, second air pipe; 323, third air pipe; 33, pressure relief member; 331, pressure relief valve; 332, pressure relief switch; 34, air pressure sensor; 35, electric control board; 351, charging interface; 36, built-in battery; 40, starting member; 41, cap body; 411, skirt; 412, bayonet; 413, ring groove; 414, air inlet; 415, mounting groove; 42, stand; 50, trigger magnet; 51, first trigger magnet; 52, second trigger magnet; 60, Hall element; 70, wireless transmission module; 80, base; 81, open slot. DETAILED DESCRIPTION

[0034] The typical embodiments embodying the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can be varied in a wide range of embodiments, none of which depart from the scope of the present application, and that the description and drawings are to be considered as illustrative only and not restrictive in nature.

[0035] In the description of the present application, it should be understood that the indications of direction or position relationship (such as up, down, left, right, front and back, etc.) in the embodiments shown in the drawings are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the positions of these elements change, the indications of these directions also change accordingly.

[0036] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of technical features. Thus, features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise explicitly and specifically limited.

[0037] Referring to Figures 1 to 9 The embodiment provides an electric suction disc 100, which comprises a shell 10, a suction disc 20, an air extraction system 30 and a starting unit.

[0038] The shell 10 is provided with a first through hole 115 penetrating the inside of the shell 10 on the end face. The suction disc 20 has a suction disc cavity 21 with one end open. The suction disc 20 is provided with a second through hole 22 penetrating the suction disc cavity 21. The suction disc 20 is fixed on the end face of the shell 10, so that the second through hole 22 corresponds to the first through hole 115. The air extraction system 30 is arranged in the shell 10 and communicates with the suction disc cavity 21 of the suction disc 20 to form a closed air channel. The air extraction system 30 is used to extract the gas in the suction disc cavity 21, so that the electric suction disc 100 can be adsorbed to the external supporting surface.

[0039] The starting unit comprises a starting piece 40, a trigger magnet 50 and a Hall element 60. The starting piece 40 is arranged in the first through hole 115 and the second through hole 22 and can move along the axis direction of the first through hole 115 and the second through hole 22. One end of the starting piece 40 extends into the suction disc cavity 21, and the other end of the starting piece 40 is provided with the trigger magnet 50. The Hall element 60 is arranged in the shell 10 and signal-communicates with the air extraction system 30.

[0040] When the external supporting surface is adsorbed on the suction disc 20 and abuts against the starting piece 40, the starting piece 40 can move into the shell 10 along the axis of the first through hole 115 and the second through hole 22. At this time, the trigger magnet 50 moves with the starting piece 40 and generates a changing magnetic field relative to the Hall element 60, so that the Hall element 60 outputs a signal for controlling the starting or closing of the air extraction system 30.

[0041] Specifically, after the suction disc 20 is attached to the external supporting surface (such as a wall surface, a table surface, etc.), the supporting surface will press the starting piece 40 in the suction disc cavity 21, and the starting piece 40 will immediately move into the shell 10, so that the trigger magnet 50 is close to the Hall element 60. The Hall element 60 can sense the change of the magnetic field intensity and generate a control signal, thereby automatically controlling the starting of the air extraction system 30 and extracting the air in the suction disc cavity 21, to realize the automatic adsorption of the electric suction disc 100. When the starting piece 40 moves to the maximum position, that is, after the suction disc 20 is completely adsorbed to the external supporting surface, the Hall element 60 can control the air extraction system 30 to automatically close, so as to improve the energy management of the equipment.

[0042] The Hall element 60 and the trigger magnet 50 adopt non-contact control. The Hall element 60 can accurately perceive the change of the magnetic field and quickly control the start and stop of the air exhaust system 30. Compared with the traditional mechanical button, it has the advantages of fast response speed, no mechanical wear and no operation noise, which can significantly improve the use reliability and service life of the electrostatic chuck 100.

[0043] Please refer to Figure 2 、 Figure 5 、 Figure 6 and Figure 7 In some embodiments, the shell 10 includes a bottom shell 11, a top cover 12 and an air chamber partition plate 13.

[0044] The bottom shell 11 forms a receiving cavity with a top opening inside, and the top cover 12 is arranged at the opening of the receiving cavity of the bottom shell 11 to seal the top of the bottom shell 11. The bottom wall of the receiving cavity of the bottom shell 11 is provided with a first convex rib 111 and a second convex rib 112, and the first convex rib 111 and the second convex rib 112 are arranged at intervals around a first through hole 115; the air chamber partition plate 13 is capped on the top of the first convex rib 111 and the second convex rib 112 to form an air chamber 113.

[0045] The bottom shell 11 is the basic support structure of the electrostatic chuck 100, and its internal structure is a cavity structure for mounting internal components such as the air exhaust system 30. The bottom wall of the bottom shell 11 is provided with two annular convex structures, i.e. the first convex rib 111 and the second convex rib 112, which are arranged in a concentric ring or an elliptical shape and jointly surround the first through hole 115. The air chamber partition plate 13 is an annular structure with a through hole in the center for the trigger magnet 50 to pass through. The air chamber partition plate 13 is installed on the top of the first convex rib 111 and the second convex rib 112, and is in sealing cooperation with the top of the first convex rib 111 and the second convex rib 112 to form a relatively closed air chamber 113. The air chamber 113 serves as a transition area between the air exhaust system 30 and the chuck cavity 21, and can effectively guide the airflow to pass through,

[0046] In other embodiments, the air chamber 113 in the shell 10 can also be formed by other structures, as long as it can form a closed cavity in the shell 10, which can communicate with the chuck cavity 21 of the chuck 20 and can exhaust the air in the chuck cavity 21 under the suction of the air exhaust system 30 to form a negative pressure.

[0047] Please refer to Figure 8 and Figure 9In some embodiments, the starting member 40 comprises a cap 41 and a column 42. The column 42 is arranged in the first through hole 115 and the second through hole 22. The cap 41 is an elastic member, and the cap 41 is fixed on the top of the column 42. The cap 41 can be embedded in the air chamber 113 formed by the first convex rib 111 and the second convex rib 112 of the shell 10. The side of the cap 41 away from the column 42 is provided with a mounting groove 415, and the trigger magnet 50 is arranged in the mounting groove 415. When the external support surface is adsorbed on the suction cup 20 and presses against the column 42, the column 42 moves towards the inside of the shell 10, the cap 41 is elastically deformed, and then the trigger magnet 50 on the cap 41 is close to the Hall element 60.

[0048] Specifically, the column 42 is arranged in the first through hole 115 and the second through hole 22 and can move linearly along the axis direction of the first through hole 115 and the second through hole 22, which can ensure the axial stability of the starting process. The cap 41 is fixed on the top of the column 42 and can be made of rubber, silica gel or other elastic materials, so that the cap 41 can have good resilience and deformation amount. When the cap 41 is deformed under force, it can quickly recover to the original state after the external force is removed, so that the column 42 can reset when not subjected to external force. The shape of the cap 41 can be matched with the structure of the air chamber 113 in the shell 10, so that the cap 41 can be embedded in the air chamber 113 surrounded by the first convex rib 111 and the second convex rib 112.

[0049] When the external support surface is adsorbed on the suction cup 20 and presses against the column 42, the column 42 moves towards the inside of the shell 10 under the action of external force, and the cap 41 on the top of the column 42 is deformed. During the elastic deformation of the cap 41, the trigger magnet 50 on the cap 41 gradually approaches the Hall element 60 arranged in the shell 10. The Hall element 60 obtains the distance information of the trigger magnet 50 according to the change of the magnetic field strength, so as to judge whether the starting member 40 has been triggered in place. When the starting member 40 is in place, the control of the air extraction system 30 starts to extract air.

[0050] Please refer to Figure 8 In some embodiments, the electric suction cup 100 further comprises a base 80 arranged on the end of the starting member 40 towards the inside of the shell 10. The trigger magnet 50 is embedded in the base 80, and the base 80 is formed with an opening slot 81 on the side towards the Hall element 60, so as to expose the trigger magnet 50.

[0051] Specifically, the base 80 is arranged in the mounting groove 415 of the starting piece 40, and the trigger magnet 50 is embedded in the base 80 to ensure that the trigger magnet 50 does not displace. An open groove 81 is formed on the side of the base 80 close to the Hall element 60, so that the trigger magnet 50 can directly expose its magnetic field to the Hall element 60 when the starting piece 40 is pushed into the shell 10, avoiding the material of the base 80 from shielding or interfering with the magnetic signal, thereby ensuring that the Hall element 60 can accurately obtain the distance change between the magnet and itself.

[0052] Please refer to Figures 7 to 9 In some embodiments, the first convex rib 111 of the bottom shell 11 is provided with an air hole 114, and the cap body 41 is provided with an air inlet 414 corresponding to the air hole 114. The suction cup cavity 21 of the suction cup 20 can be communicated with the air chamber 113 in the shell 10 through the gap between the stand column 42, the first through hole 115 and the second through hole 22, the air hole 114 and the air inlet 414, so that the suction system 30 can extract the gas in the suction cup cavity 21 communicated with the air chamber 113.

[0053] Specifically, the bottom surface of the cap body 41 is provided with a ring groove 413, and the outer periphery of the cap body 41 is provided with a skirt 411. When the starting piece 40 is installed on the bottom shell 11, the skirt 411 is located between the first convex rib 111 and the second convex rib 112, and the first convex rib 111 on the bottom shell 11 is embedded into the ring groove 413 of the cap body 41, and the air chamber partition plate 13 is pressed on the cap body 41 and the second convex rib 112 to jointly form a sealed air chamber 113. The air inlet 414 is provided on the cap body 41, and the air inlet 414 corresponds to the air hole 114 on the first convex rib 111, so that the one end of the air hole 114 facing the air chamber 113 is always in an open state. The outer end of the air hole 114 away from the air chamber 113 is blocked and closed by the inner wall of the ring groove 413 of the cap body 41, so that the air chamber 113 and the suction cup cavity 21 are mutually separated.

[0054] When the external supporting surface is adsorbed on the suction cup 20, the surface of the external object presses the stand column 42 of the starting piece 40, and the cap body 41 deforms towards the inside of the shell 10, so that the side wall of the ring groove 413 of the cap body 41 and the outer end of the air hole 114 are away from each other to form a gap. At this time, the gas in the suction cup cavity 21 can enter the annular air chamber 113 through the second through hole 22 on the suction cup 20 and the gap between the first through hole 115 on the bottom shell 11 and the outer wall of the stand column 42, the air hole 114 on the first convex rib 111, the air inlet 414 on the cap body 41 in turn, and finally be extracted by the suction system 30 to maintain the negative pressure state in the suction cup 20.

[0055] In some embodiments, the skirt 411 of the starting piece 40 is further provided with a bayonet 412 capable of being clamped with a structure on the bottom shell 11, so that the starting piece 40 can be quickly mounted on the first convex rib 111 and the second convex rib 112 of the bottom shell 11, and the air inlet 414 on the cap body 41 is aligned with the air hole 114 on the first convex rib 111.

[0056] Please refer to Figure 5 In some embodiments, the air extraction system 30 includes an air pump 31, an air pipe 32 and a pressure relief piece 33. The air pump 31 is in communication with the air chamber 113 in the shell 10 through the air pipe 32, so that the air pump 31 can extract the gas in the air chamber 113. The pressure relief piece 33 is arranged on the air pipe 32, and the pressure relief piece 33 can communicate the air chamber 113 with the external environment to balance the air pressure in the air chamber 113 and the external environment. In some embodiments, the air pump 31 can be various types of air pumps such as rotary vane vacuum pump, diaphragm vacuum pump, piston air pump, etc.

[0057] Specifically, the air chamber 113 is in communication with the pressure relief piece 33 through the first air pipe 321, and the pressure relief piece 33 is in communication with the air pump 31 through the second air pipe 322, so that the air pump 31 can continuously extract the air in the air chamber 113, effectively generate negative pressure, and ensure that the suction cup 20 is firmly attached to the external object and is not easy to fall off.

[0058] Please refer to Figure 5 In some embodiments, the air pump 31 is provided with an air nozzle 311, which can discharge the gas extracted by the air pump 31 into the accommodating cavity of the shell 10.

[0059] Please refer to Figure 5 In some embodiments, the pressure relief piece 33 can include a pressure relief valve 331 and a pressure relief switch 332. The pressure relief valve 331 is arranged between the first air pipe 321 and the second air pipe 322. One end of the pressure relief switch 332 is connected to the pressure relief valve 331, and the other end of the pressure relief switch 332 extends to the outer side of the shell 10, so that the user can manually control the pressure relief valve 331 to open, so that the gas can enter the air chamber 113 to balance the negative pressure on the suction cup 20, so that the external object can be taken off from the suction cup 20.

[0060] Please refer to Figure 5 In some embodiments, the air extraction system 30 includes an electric control board 35. The electric control board 35 is in signal communication with the air pump 31, and a Hall element 60 is arranged on the electric control board 35 and electrically connected with the electric control board 35. The electric control board 35 is pre-set with a plurality of position data of the starting piece 40.

[0061] When the external support surface abuts the starting piece 40, the trigger magnet 50 on the starting piece 40 is close to the Hall element 60, the Hall element 60 can obtain the position information of the trigger magnet 50 on the starting piece 40, and transmit the position information to the electric control board 35 and compare the position information with the preset position data in the electric control board 35, and control the air pump 31 to start or stop according to the comparison result.

[0062] Specifically, the electric control board 35 is the intelligent control center of the whole electrostatic chuck 100, which can process and analyze the signals returned by the Hall element 60, and control the opening and closing of the air pump 31 accordingly. The Hall element 60 is arranged on the electric control board 35 and communicates data with the electric control board 35 through a circuit, forming a control unit with compact structure and simple wiring.

[0063] When the external support surface contacts the chuck 20 and pushes the starting piece 40, the starting piece 40 moves inward along the axis of the second through hole 22 and the first through hole 115 to drive the trigger magnet 50 on the top to pass through the air chamber partition plate 13 and approach the Hall element 60, thereby causing a change in the magnetic induction intensity of the Hall element 60, so that the Hall element 60 can detect the position change of the trigger magnet 50 on the starting piece 40 in real time.

[0064] The plurality of position data preset in the electric control board 35 correspond to different air pump 31 control logics. For example, when the trigger magnet 50 is within a certain set range, it is considered that the user has pressed the starting piece 40 to the position, and the electric control board 35 issues a control instruction to start the air pump 31 accordingly; otherwise, it is judged that the adsorption is not ready or has been released, and the air pump 31 is controlled to be closed.

[0065] Please refer to Figure 3 In some embodiments, the Hall element 60 is a single-pole Hall switch; the electric control board 35 is preset with an initial trigger position and a cutoff trigger position. When the trigger magnet 50 is at the initial trigger position of the starting piece 40, the trigger magnet 50 generates a magnetic field intensity that can be sensed by the Hall element 60 and outputs a signal to start the air suction system 30. When the trigger magnet 50 is between the initial trigger position and the cutoff trigger position of the starting piece 40, the magnetic field intensity that can be sensed by the Hall element 60 is maintained and a signal is output to maintain the air suction system 30. When the trigger magnet 50 moves towards the inside of the shell 10 and passes through the cutoff trigger position, the magnetic field intensity generated by the trigger magnet 50 is lower than the magnetic field intensity threshold that can be sensed by the Hall switch, and a signal is output to close the air suction system 30 to stop the air suction.

[0066] Specifically, the distance data preset in the electric control board 35 includes an initial trigger position and a cut-off trigger position. The initial trigger position is used to determine whether the user has pressed the starting piece 40 to a set position, i.e., when the Hall element 60 detects that the trigger magnet 50 has crossed the initial trigger position, the electric control board 35 recognizes that the starting piece 40 has been pushed to the effective adsorption starting position by the external supporting surface, thereby issuing a command to drive the air pump 31 to start and begin to extract the gas in the suction cup cavity 21, so as to realize the negative pressure adsorption of the electrostatic suction cup 100 and the external supporting surface.

[0067] With the air extraction, the trigger magnet 50 continues to move towards the inside of the shell 10, and when the distance approaches and crosses the cut-off trigger position, i.e., the set limit distance of the movement of the starting piece 40 and remains stable at the limit distance. It indicates that the adsorption process has been completed, and the negative pressure has been established sufficiently. The electric control board 35 can control the air pump 31 to stop working, and maintain the current adsorption state to avoid excessive air extraction. So that the electrostatic suction cup 100 can be in a stable adsorption state, and the load of the air pump 31 is reduced.

[0068] In some embodiments, a dynamic feedback mechanism can also be provided in the electric control board 35. That is, when the Hall element 60 detects that the relative distance from the trigger magnet 50 changes, i.e., the Hall element 60 slightly floats from the cut-off trigger position towards the initial trigger position. The electric control board 35 judges that the suction cup 20 may be caused by external disturbance or supporting surface deformation and other factors to cause the negative pressure to decrease slightly. At this time, the electric control board 35 can control the air pump 31 to supplement the air extraction for a short time to maintain the original adsorption strength, ensure the stability and reliability of the suction cup 20, and prevent accidental falling.

[0069] Please refer to Figure 10 In some embodiments, the Hall element 60 is a bipolar Hall switch, and the trigger magnet 50 includes a first trigger magnet 51 and a second trigger magnet 52 which are arranged in a spaced manner along the movement direction of the starting piece 40. The magnetic poles of the first trigger magnet 51 and the second trigger magnet 52 facing the Hall element 60 are opposite.

[0070] When the first trigger magnet 51 on the starting piece 40 moves to correspond to the Hall element 60, the first trigger magnet 51 generates a magnetic field strength that can be sensed by the Hall element 60 and outputs a signal to start the air extraction system 30 to extract air. When the starting piece 40 moves towards the inside of the shell 10 so that the second magnet on the starting piece 40 corresponds to the Hall element 60, the second trigger magnet 52 generates a magnetic field strength that can be sensed by the Hall element 60 and outputs a signal to close the air extraction system 30 to stop air extraction.

[0071] Specifically, the Hall element 60 adopts a bipolar Hall switch, which can identify and distinguish different polarities of magnetic field directions and output different electrical signals, so as to realize precise multi-segment trigger control. The first trigger magnet 51 is located above the second trigger magnet 52, and the magnetic pole directions of the first trigger magnet 51 and the second trigger magnet 52 facing the Hall element 60 are opposite, that is, one is N-pole facing the direction of the open slot 81 of the base 80, and the other is S-pole facing the direction of the open slot 81 of the base 80, so that the Hall element 60 can accurately distinguish the trigger state of different positions.

[0072] When the user presses the starting piece 40 through the external supporting surface, the starting piece 40 moves inward along the through hole of the shell 10. First, the first trigger magnet 51 approaches and moves to the sensing position of the Hall element 60; at this time, the Hall element 60 identifies the polarity and magnetic field strength corresponding to the first trigger magnet 51, and outputs a starting signal, so that the electric control board 35 controls the air pump 31 to start pumping, thereby establishing an adsorption state.

[0073] With the further pressing of the starting piece 40, the second trigger magnet 52 moves to the corresponding position of the Hall element 60. Since the magnetic pole direction of the second magnet is opposite to that of the first magnet, the Hall element 60 senses the polarity change and identifies it as another state signal, so that the electric control board 35 closes the air pump 31, completes the pumping process and maintains a negative pressure state.

[0074] Please refer to Figure 5 In some examples, the air pumping system 30 includes an air pressure sensor 34. The air pressure sensor 34 is arranged on the air pipe 32 and is in signal communication with the electric control board 35. The air pressure sensor 34 is used to detect the air pressure information in the air chamber 113 and transmit the air pressure information to the electric control board 35, and the electric control board 35 controls the air pump 31 to pump according to the air pressure information.

[0075] Specifically, the air pressure sensor 34 is closed connected with one end of the third air pipe 323, and the other end of the third air pipe 323 is connected with the pressure relief piece 33, that is, the air pressure sensor 34 is in communication with the second air pipe 322, the first air pipe 321 and the air chamber 113 through the third air pipe 323, and the air pressure sensor 34 can monitor the air pressure information in the air pumping system 30.

[0076] The air pressure sensor 34 can sensitively perceive the air pressure value in the suction cup cavity 21, and the corresponding air pressure threshold value is preset in the electric control board 35. When the detected actual air pressure is higher than the preset value, it indicates that the vacuum degree in the suction cup 20 has not reached the standard. At this time, the electric control board 35 will control the air pump 31 to continue pumping until the negative pressure reaches stability and is maintained in the target range. If a small amount of air enters the suction cup cavity 21 through the gap between the suction cup 20 and the adsorbent plane, causing the air pressure to change. The air pressure sensor 34 can also accurately identify the negative pressure change and transmit the information to the electric control board 35, which controls the air pump 31 to supplement the pumping to maintain a fixed negative pressure in the suction cup cavity 21.

[0077] Referring to Figure 3 and Figure 5 In some embodiments, the air pumping system 30 further comprises a charging interface 351 and a built-in battery 36. The built-in battery 36 is electrically connected with the electric control board 35, and the charging interface 351 is arranged on the electric control board 35. The charging interface 351 is used for connecting with an external power line, so that the external power source can charge the built-in battery 36 through the electric control board 35.

[0078] Specifically, the charging interface 351 is used for connecting with an external power line. The charging interface 351 can be a USB interface or a typc-c interface. The built-in battery 36 can be a lithium battery or other rechargeable battery. The built-in battery 36 is installed on the lower side of the electric control board 35 and is electrically connected with the electric control board 35 through a wire to supply power to the electric control board 35, the air pump 31, the Hall element 60, the air pressure sensor 34 and other electronic elements. The electro-suction cup 100 is powered by the built-in battery 36 and can be operated wirelessly without external power lines, which is especially suitable for scenes that require mobile adsorption or quick fixing in an environment without fixed power supply.

[0079] Referring to Figure 5 In some embodiments, the electro-suction cup 100 comprises a wireless transmission module 70. The wireless transmission module 70 is arranged on the electric control board 35 and is electrically connected with the electric control board 35. The wireless transmission module 70 is used for signal communication with an external terminal, so that the external terminal can obtain the working state of the electro-suction cup 100.

[0080] The wireless transmission module 70 is arranged in the shell 10 and can be electrically connected with the electric control board 35. The wireless transmission module 70 can use Bluetooth, Wi-Fi and other wireless communication technologies to realize signal communication with a mobile phone APP, a smart furniture master control console and other external electronic devices, so as to transmit the information such as the power, the endurance time and the negative pressure of the electro-suction cup 100 to the external electronic devices, so that the user can check the power and the adsorption state of the electro-suction cup 100 at any time, avoiding the interruption of use due to power consumption.

[0081] Referring to Figure 1 and Figure 2In some embodiments, the end surface of the shell 10 away from the suction cup 20 is provided with a connecting portion 121 for connecting and fixing with photographic equipment.

[0082] The connecting portion 121 can be a standard threaded interface (such as a 1 / 4 screw), a hot shoe interface, a cold shoe interface, a screw hole, a quick-mount buckle seat, a gimbal, or other common connecting structures. The electric suction cup 100 can be used as a connecting seat for different photographic accessories to adapt to various lighting, microphones, cameras, camera supports, mobile phone holders, and other equipment.

[0083] In use, the user only needs to connect the photographic accessory to the connecting portion 121 on the electric suction cup 100. Then, the end of the suction cup 20 is attached to a smooth and flat wall, glass, metal, or plastic surface, and the suction is triggered by starting the unit, so that the photographic accessory is fixed to the external support surface. The entire fixing process is simple and convenient.

[0084] In summary, the electric suction cup 100 of the embodiment includes a shell 10, a suction cup 20 arranged on the shell 10, an air extraction system 30 arranged in the shell 10, and a starting unit. The starting unit includes a starting piece 40, a trigger magnet 50, and a Hall element 60. The Hall element 60 can obtain the distance information between the trigger magnet 50 on the starting piece 40 and the Hall element 60.

[0085] When the suction cup 20 is adsorbed on the external support surface, the starting piece 40 is automatically moved along the axis direction of the through hole under the abutment of the support surface, and the trigger magnet 50 is driven to approach the Hall element 60 arranged in the shell 10, so that the Hall element 60 can accurately perceive the change of the magnetic field and quickly control the start and stop of the air extraction system 30. The entire process does not require manual key operation, greatly improving the convenience and automation degree of use. At the same time, since the Hall element 60 adopts a non-contact magnetic induction principle, the wear, noise, and service life problems caused by frequent mechanical actions of the traditional key structure are avoided, which helps to improve the stability and reliability of the device, and is especially suitable for photographic and video application scenarios with high requirements for quiet environment and high-frequency operation.

[0086] Although the utility model has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary, rather than limiting terms. Since the utility model can be embodied in various forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the above-mentioned details, but should be interpreted broadly within the spirit and scope defined by the appended claims, and therefore all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An electrostatic chuck, comprising: The application relates to an electrostatic chucking device. The device comprises a housing, a suction disc, an air extraction system and a starting unit. The housing is provided with a first through hole penetrating the inside of the housing on the end face. The suction disc is provided with a second through hole penetrating the suction disc cavity on the end face. The air extraction system is arranged in the housing and communicates with the suction disc cavity to form a closed air channel. The starting unit comprises a starting member, a trigger magnet and a Hall element. The starting member is arranged in the first through hole and the second through hole and can move along the axis of the first through hole and the second through hole.

2. The electrostatic chuck of claim 1, wherein, One end of the starting member extends into the suction disc cavity, and the other end of the starting member is provided with the trigger magnet.

3. The electrostatic chuck of claim 2, wherein, The Hall element is arranged in the housing and communicates with the air extraction system. When the external support surface is adsorbed on the suction disc and abuts against the starting member, the starting member can move into the housing along the axis of the first through hole and the second through hole.

4. The electrostatic chuck of claim 3, wherein, The trigger magnet moves with the starting member and generates a changing magnetic field relative to the Hall element, so that the Hall element outputs a signal for controlling the starting or stopping of the air extraction system.

5. The electrostatic chuck of claim 2, wherein, The housing comprises a bottom shell, a top cover and an air chamber partition. The bottom shell is internally provided with a containing cavity with an open top. The top cover is arranged at the opening of the containing cavity of the bottom shell to seal the top of the bottom shell. The bottom wall of the containing cavity of the bottom shell is provided with a first convex rib and a second convex rib. The first convex rib and the second convex rib are arranged around the first through hole. The air chamber partition covers the top of the first convex rib and the second convex rib to form an air chamber. The starting member comprises a cap body and a column. The column is arranged in the first through hole and the second through hole. The cap body is a resilient member and is fixed on the column. The cap body is embedded in the air chamber formed by the first convex rib and the second convex rib of the housing. The end face of the cap body away from the column is provided with a mounting groove, and the trigger magnet is arranged in the mounting groove. When the external support surface is adsorbed on the suction disc and abuts against the column, the column moves towards the inside of the housing, the cap body elastically deforms, and the trigger magnet on the cap body approaches the Hall element. The first convex rib of the bottom shell is provided with an air hole. The cap body is provided with an air inlet corresponding to the air hole. The suction disc cavity can communicate with the air chamber in the housing through the gap between the column and the first through hole and the second through hole, the air hole and the air inlet, so that the air extraction system can extract the gas in the suction disc cavity communicating with the air chamber. The air extraction system comprises an air pump, an air pipe and a pressure relief member. The air pump communicates with the air chamber in the housing through the air pipe, so that the air pump can extract the gas in the air chamber. The pressure relief member is arranged on the air pipe and can communicate the air chamber with the external environment to balance the air pressure in the air chamber and the external air pressure.

6. The electrostatic chuck of claim 5, wherein, The air extraction system comprises an electric control board in signal communication with the air pump; the Hall element is disposed on the electric control board and electrically connected with the electric control board; The electric control board is pre-set with position data of a plurality of starting elements; When the external supporting surface abuts against the starting element, and the trigger magnet on the starting element approaches the Hall element, the Hall element can acquire the position of the trigger magnet on the starting element, and transmit the position information to the electric control board for comparison with the pre-set position data in the electric control board, and control the air pump to start or stop according to the comparison result.

7. The electrostatic chuck of claim 6, wherein, The air extraction system comprises an air pressure sensor disposed on the air pipe and in signal communication with the electric control board; the air pressure sensor is used to detect the air pressure information in the air chamber and transmit the air pressure information to the electric control board, and the electric control board controls the air pump to extract air according to the air pressure information.

8. The electrostatic chuck of claim 6, wherein, The air extraction system further comprises a charging interface and an internal battery electrically connected with the electric control board, and the charging interface is disposed on the electric control board; the charging interface is used to connect with an external power line, so that the external power source can charge the internal battery through the electric control board.

9. The electrostatic chuck of claim 6, wherein, The electrostatic chuck comprises a wireless transmission module disposed on the electric control board and electrically connected with the electric control board; the wireless transmission module is used to be in signal communication with an external terminal, so that the external terminal can acquire the working state of the electrostatic chuck.

10. The electrostatic chuck of claim 6, wherein, The Hall element is a single-pole Hall switch; the electric control board is pre-set with an initial trigger position and a cut-off trigger position; When the trigger magnet is at the initial trigger position of the starting element, the trigger magnet generates a magnetic field strength that can be sensed by the Hall element and outputs a signal to start the air extraction system to extract air; when the trigger magnet is between the initial trigger position and the cut-off trigger position of the starting element, the trigger magnet maintains a magnetic field strength that can be sensed by the Hall element and outputs a signal to maintain the air extraction system to extract air; when the trigger magnet moves towards the inside of the shell and passes the cut-off trigger position, the magnetic field strength generated by the trigger magnet is lower than the magnetic field strength threshold that can be sensed by the Hall switch, and a signal is outputted to close the air extraction system to stop extracting air.

11. The electrostatic chuck of claim 1, wherein, The Hall element is a bipolar Hall switch, and the trigger magnet comprises a first trigger magnet and a second trigger magnet disposed in the moving direction of the starting element; the magnetic poles of the first trigger magnet and the second trigger magnet facing the direction of the Hall element are opposite; When the first trigger magnet on the starting element moves to correspond to the Hall element, the first trigger magnet generates a magnetic field strength that can be sensed by the Hall element and outputs a signal to start the air extraction system to extract air; when the starting element moves towards the inside of the shell and the second magnet on the starting element corresponds to the Hall element, the second trigger magnet generates a magnetic field strength that can be sensed by the Hall element and outputs a signal to close the air extraction system to stop extracting air.

12. The electrostatic chuck of claim 1, wherein, The electric suction disc further comprises a base arranged on the end of the starting member facing the inside of the shell; the trigger magnet is embedded in the base, and the base is formed with an open slot exposing the trigger magnet on the side facing the Hall element.

13. The electrostatic chuck of claim 1, wherein, The end surface of the shell away from the suction disc is provided with a connecting portion for connecting and fixing with a photographic equipment.

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