Negative pressure adsorption fixing device

Abstract

The utility model provides a negative pressure adsorption fixing device. The negative pressure adsorption fixing device comprises a shell, an adsorption holding piece, a negative pressure forming assembly, a solar panel and a battery. An accommodating cavity is formed in the shell; the suction holding piece is used for being adsorbed on the adsorption surface; an adsorption cavity is formed in the end, away from the shell, of the adsorption piece and communicates with the containing cavity; the adsorption cavity is matched with the adsorption surface to form a closed space; the negative pressure forming assembly is used for generating negative pressure in the containing cavity so that negative pressure can be formed in the closed space. The solar panel is installed on the shell and provided with a light absorption face, at least part of the light absorption face is exposed out of the shell, and the solar panel is used for converting solar energy into electric energy. The battery is used for supplying power to the negative pressure forming assembly and can store electric energy converted by the solar panel. According to the negative pressure adsorption fixing device, power can be continuously supplied to the battery through the solar panel, and the problem that the battery endurance of the negative pressure adsorption fixing device is insufficient is solved.

Description

Technical Field

[0001] This application relates to the field of suction device technology, specifically to a negative pressure adsorption fixing device. Background Technology

[0002] Drivers often need to keep electronic devices within their field of vision while driving to view navigation and road conditions; sometimes, passengers also need to free their hands by securing electronic devices to the vehicle to watch videos or other content. Typically, electronic devices can be mounted to the vehicle using brackets or magnetic attachments. Brackets, limited by the vehicle's structure, are often only installed in designated locations, while magnetic attachments, relying on negative pressure, can be attached to a wider range of locations, offering greater flexibility in securing electronic devices compared to brackets.

[0003] However, during extended driving periods, the battery in the adsorption device often experiences insufficient range, requiring users to frequently charge the device using a power source, which causes significant inconvenience. Utility Model Content

[0004] This application mainly provides a negative pressure adsorption fixing device, which can solve the problem of insufficient battery life in the adsorption device.

[0005] To address the aforementioned technical problems, this application provides a negative pressure adsorption fixing device, comprising a housing, a holding member, a negative pressure forming component, a solar panel, and a battery. The housing has an internal receiving cavity; the holding member is used to adsorb onto an adsorption surface; an adsorption cavity is provided at the end of the holding member away from the housing, and the adsorption cavity communicates with the receiving cavity; the adsorption cavity is used to cooperate with the adsorption surface to form a sealed space; the negative pressure forming component is used to generate negative pressure in the receiving cavity to create negative pressure in the sealed space; the solar panel is mounted on the housing, the solar panel has a light-absorbing surface, at least a portion of which is exposed outside the housing, and the solar panel is used to convert solar energy into electrical energy; the battery is used to power the negative pressure forming component, and the battery is capable of storing the electrical energy converted by the solar panel.

[0006] In one embodiment, the outer casing has a first end face and a second end face that are opposite to each other along the axial direction of the outer casing; the suction member is installed on the first end face of the outer casing, the cavity wall of the suction cavity is provided with a first connecting hole, and the first end face of the outer casing is provided with a second connecting hole; the suction cavity is connected to the receiving cavity through the first connecting hole and the second connecting hole; the solar panel is installed on the second end face of the outer casing.

[0007] In one embodiment, a mounting groove is provided on the second end face; the solar panel is installed in the mounting groove, and the light-absorbing surface of the solar panel is flush with the second end face.

[0008] In one embodiment, the solar panel is rotatably disposed on the second end face, and the solar panel can be raised and lowered relative to the second end face by rotation to adjust the angle of the solar panel.

[0009] In one embodiment, the negative pressure adsorption fixing device further includes a magnetic element, which is mounted on the housing and is used to magnetically adsorb the object to be fixed.

[0010] In one embodiment, the magnetic element is mounted on the side of the solar panel away from the outer casing, and the magnetic element exposes at least a portion of the light-absorbing surface.

[0011] In one embodiment, the magnetic element is ring-shaped or arc-shaped.

[0012] In one embodiment, the negative pressure adsorption fixing device further includes a charging interface for connecting to an external power source to supply power to the battery.

[0013] In one embodiment, the negative pressure adsorption fixing device further includes a first charging circuit, a second charging circuit, and a comparator. The first charging circuit includes a first switching module for connecting to a solar panel, and the second charging circuit includes a second switching module for connecting to an external power source.

[0014] One end of the first switch module is connected to the solar panel, and the other end of the first switch module is used to connect to the battery; one end of the second switch module is connected to an external power source, and the other end of the second switch module is used to connect to the battery; the first input terminal of the comparator is connected to the first charging circuit, the second input terminal of the comparator is connected to the second charging circuit, and the output terminal of the comparator is used to output the comparison result. The first switch module closes or opens in response to the comparison result of the comparator, and the second switch module closes or opens in response to the comparison result of the comparator.

[0015] In one embodiment, the first charging circuit further includes a first protection module, and the second charging circuit further includes a second protection module; one end of the first protection module is connected to the first switch module, and the other end of the first protection module is connected to the battery; one end of the second protection module is connected to the second switch module, and the other end of the second protection module is connected to the battery; the first protection module and the second protection module are used to prevent reverse current.

[0016] In one embodiment, the negative pressure forming assembly includes a drive member, a piston, and a cylinder. The cylinder has a receiving cavity inside, which communicates with a receiving chamber. The piston is disposed in the receiving cavity. The drive member is used to drive the piston to move the piston and generate negative pressure in the receiving chamber.

[0017] In one embodiment, the negative pressure adsorption fixing device further includes an opening component, which includes a first movable part and a switch. One end of the first movable part is disposed outside the receiving cavity, and the other end of the first movable part is disposed inside the receiving cavity. The first movable part can move toward the inside of the receiving cavity to trigger the switch to activate the negative pressure forming component.

[0018] In one embodiment, the suction chamber of the holding member has an suction port for abutting against the suction surface; the movement direction of the first movable part is parallel to the axial direction of the suction port; when the holding member is adsorbed on the suction surface, the first movable part can abut against the suction surface and move into the receiving cavity under the pressure of the suction surface.

[0019] In one embodiment, the switching element is a bidirectional changeover switch, and the first movable part is also capable of moving toward the outside of the receiving cavity to actuate the bidirectional changeover switch to activate the negative pressure forming assembly.

[0020] In one embodiment, the negative pressure adsorption fixing device further includes an air intake assembly for communicating the receiving cavity with the outside of the housing, so that the adsorption member can be separated from the adsorption surface.

[0021] In one embodiment, the air intake assembly includes a second movable part, one end of which is disposed outside the housing and the other end of which is disposed inside the housing; the second movable part can open the air passage between the receiving cavity and the outside of the housing when subjected to pressure.

[0022] This application provides a negative pressure adsorption fixing device, which includes a housing, a holding member, a negative pressure forming component, a solar panel, and a battery. The housing has an internal receiving cavity; the holding member is used to adsorb onto an adsorption surface; an adsorption cavity is provided at the end of the holding member away from the housing, and the adsorption cavity communicates with the receiving cavity; the adsorption cavity is used to cooperate with the adsorption surface to form a sealed space; the negative pressure forming component is used to generate negative pressure in the receiving cavity, so that the sealed space forms a negative pressure; the solar panel is mounted on the housing, the solar panel has a light-absorbing surface, at least a portion of which is exposed outside the housing, and the solar panel is used to convert solar energy into electrical energy; the battery is used to power the negative pressure forming component, and the battery is capable of storing the electrical energy converted by the solar panel. By installing a solar panel on the housing, the negative pressure adsorption fixing device of this application can convert solar energy into electrical energy and store it in the battery during daytime driving. That is, during the day, the solar panel can continuously power the battery, allowing the battery to continuously power the negative pressure forming component, thus solving the problem of insufficient battery life in negative pressure adsorption fixing devices. Users do not need to frequently use a power source for charging, improving the user experience. When the vehicle is not in use during the day, the solar panels can convert solar energy into electrical energy to replenish the battery's power loss when it is left to stand naturally, so that the battery of the negative pressure adsorption fixing device can also have sufficient power supply at night. Attached Figure Description

[0023] Figure 1 A schematic diagram of the structure of a negative pressure adsorption fixing device provided in an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the negative pressure adsorption and fixation device provided in one embodiment of this application from another perspective.

[0025] Figure 3 for Figure 1 A schematic diagram of the exploded structure;

[0026] Figure 4 This is a schematic diagram of the structure of the lower shell provided in one embodiment of this application;

[0027] Figure 5 A block diagram of the charging circuit of a negative pressure adsorption fixing device provided in an embodiment of this application;

[0028] Figure 6 A block diagram of the connection structure of a comparator provided in an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the structure of the lower housing, negative pressure forming component, opening component, and air intake component provided in an embodiment of this application;

[0030] Figure 8 This is a schematic diagram of the negative pressure forming component, opening component, and air intake component provided in an embodiment of this application.

[0031] Figure 9 This is a schematic diagram of the structure of a negative pressure forming component (exploded view), an opening component, and an air intake component provided in an embodiment of this application. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0033] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0034] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0035] This application provides a negative pressure adsorption fixing device. This device can be used to adsorb onto an adsorption surface, and by providing a connecting part, the part to be fixed can be secured to the device, thereby fixing the part to the adsorption surface. The connection method between the connecting part and the part to be fixed can be, but is not limited to, snap-fit ​​connection, magnetic connection, interference fit connection, etc. In one application scenario, this negative pressure adsorption fixing device can be used in a vehicle environment, fixing the device to the vehicle body and securing electronic devices to it via the connecting part, allowing users to view the content displayed on the electronic devices. Of course, this negative pressure adsorption fixing device is not limited to vehicle environments and can be used in any application scenario requiring the fixing of parts.

[0036] Please refer to Figure 1-3 The negative pressure adsorption fixing device includes a housing 10, a suction member 20, a negative pressure forming component 30, a solar panel 40, and a battery. The housing 10 has an internal receiving cavity 11. Specifically, the housing 10 may include an upper housing and a lower housing, which are detachably connected and cooperate to form the receiving cavity 11.

[0037] The suction member 20 is used for adsorption onto the adsorption surface. The suction member 20 is mounted on the housing 10. Specifically, the suction member 20 can be mounted on the end face of the housing 10 along the axial direction, or it can be mounted on the annular sidewall of the housing 10. Figure 2 As shown, the end of the suction member 20 away from the outer shell 10 is provided with an adsorption cavity 21, which is connected to the receiving cavity 11, meaning that the internal gas pressure of the adsorption cavity 21 and the receiving cavity 11 is the same. The adsorption cavity 21 is used to cooperate with the adsorption surface to form a sealed space.

[0038] The suction element 20 can be, for example, a suction cup or an adsorption ring. In order to ensure that the suction element 20 fits tightly with the adsorption surface and prevent air leakage in the sealed space formed by the suction element 20 and the adsorption surface, the suction element 20 can be made of a flexible material. Flexible materials have deformable properties, which can make the suction element 20 fit the adsorption surface better.

[0039] like Figure 2 and Figure 3 As shown, the negative pressure forming component 30 is used to generate negative pressure in the receiving cavity 11. Since the receiving cavity 11 is connected to the sealed space, the negative pressure forming component 30 can create negative pressure in the sealed space, so that the suction member 20 can generate a negative pressure suction effect. The negative pressure forming component 30 can stably generate negative pressure in the sealed space by being energized. Compared with natural suction (such as squeezing out the air in the sealed space to make the suction member 20 adsorb onto the suction surface), the negative pressure generating component 30 generates negative pressure in a more stable and reliable way.

[0040] like Figure 1 and Figure 3 As shown, the solar panel 40 is a component capable of converting solar energy into electrical energy. The solar panel 40 is mounted on the housing 10. The solar panel 40 has a light-absorbing surface 41, at least a portion of which is exposed outside the housing 10. Preferably, to improve the energy conversion efficiency of the solar panel 40, the entire light-absorbing surface 41 is exposed outside the housing 10, so that the solar panel 40 can fully convert solar energy. A battery is used to power the negative pressure forming assembly 30, and the battery is capable of storing the electrical energy converted by the solar panel 40.

[0041] The negative pressure adsorption fixing device of this application, by installing a solar panel 40 on the outer casing 10, allows the solar panel 40 to convert solar energy into electrical energy and store it in the battery during daytime driving. This means that the solar panel 40 can continuously supply power to the battery during the day, enabling the battery to continuously power the negative pressure forming component 30, thus solving the problem of insufficient battery life in the negative pressure adsorption fixing device. Users do not need to frequently charge the device, improving the user experience. When the device is not in use during the day, the solar panel 40 can also convert solar energy into electrical energy to replenish the battery's capacity lost during natural storage, ensuring sufficient power supply for the negative pressure adsorption fixing device's battery even at night.

[0042] like Figure 3 and Figure 4As shown, in one embodiment, the outer casing 10 has a first end face 12 and a second end face 13 that are opposite to each other along the axial direction of the outer casing 10. A suction member 20 is mounted on the first end face 12 of the outer casing 10. The cavity wall of the suction chamber 21 has a first connecting hole 211, and the first end face 12 of the outer casing 10 has a second connecting hole 121. The suction chamber 21 communicates with the receiving cavity 11 through the first connecting hole 211 and the second connecting hole 121. A solar panel 40 is mounted on the second end face 13 of the outer casing 10. Since the suction member 20 is mounted on the first end face 12 of the outer casing 10, the first end face 12 of the outer casing 10 typically faces the vehicle body, and the second end face 13 of the outer casing 10 faces the vehicle window. Mounting the solar panel 40 on the second end face 13 of the outer casing 10 facilitates the absorption of solar energy by the solar panel 40 through the vehicle window.

[0043] In one embodiment, such as Figure 3 As shown, a mounting groove 131 is provided on the second end face 13. The solar panel 40 is installed in the mounting groove 131, and the light-absorbing surface 41 of the solar panel 40 is flush with the second end face 13, so that components such as magnetic suction devices can be installed more smoothly on one side of the second end face 13 of the outer casing 10. Of course, in other embodiments, the light-absorbing surface 41 of the solar panel 40 may be lower or higher than the second end face 13.

[0044] In other embodiments, the solar panel 40 can also be rotatably mounted on the second end face 13. The solar panel 40 can be raised and lowered relative to the second end face 13 by rotation to adjust the angle of the solar panel 40. The solar panel 40 can form an angle with the second end face 13, and the user can adjust the angle between the solar panel 40 and the second end face 13 according to the current direction of sunlight, thereby improving the energy utilization rate of the solar panel 40.

[0045] Furthermore, the negative pressure adsorption fixing device also includes a connecting wire (not shown) and a circuit board 60. The circuit board 60, the negative pressure forming component 30, and the battery are all disposed inside the receiving cavity 11 to ensure the simplicity of the appearance of the negative pressure adsorption fixing device. One end of the connecting wire is electrically connected to the solar panel 40, and the other end of the connecting wire is electrically connected to the circuit board 60. The mounting groove 131 has a connection hole on its wall for the connecting wire to pass through, so that the solar panel 40 on the outside of the housing 10 can be electrically connected to the circuit board 60 inside the housing 10.

[0046] In one embodiment, the negative pressure adsorption fixing device further includes a magnetic element 50, which is mounted on the housing 10. Preferably, the magnetic element 50 is mounted on the end of the housing 10 away from the first end face 12. In another embodiment, the magnetic element 50 may be mounted on the side of the solar panel 40 away from the housing 10, and the magnetic element 50 exposes at least a portion of the light-absorbing surface 41. For example, the magnetic element 50 may be configured as a ring or an arc.

[0047] The magnetic component 50 is used for magnetic adsorption with the component to be fixed. That is, in this embodiment, the connecting portion is configured as the magnetic component 50. In applications involving fixing electronic devices, the holding component 20 can hold the vehicle body, and the magnetic component 50 can magnetically hold the electronic device; alternatively, the magnetic component 50 can magnetically hold the vehicle body, and the holding component 20 can hold the electronic device. Typically, the casing of the electronic device is made of metal, and the metal casing can magnetically adsorb with the magnetic component 50. Alternatively, the electronic device may have internal metal or magnetic components that can magnetically adsorb with the magnetic component 50. This embodiment utilizes the characteristics typically found in electronic devices to reliably connect electromagnetic devices to a negative pressure adsorption fixing device.

[0048] Furthermore, the negative pressure adsorption fixing device may also include a wireless charging coil, which can wirelessly charge the electronic device when the magnetic component 50 magnetically adsorbs the electronic device.

[0049] like Figure 3 As shown, in one embodiment, the negative pressure adsorption fixing device further includes a charging interface 61, which is used to connect to an external power source to supply power to the battery. Even if the solar panel 40 can charge the battery, the battery's stored power may still be depleted during long nighttime trips. Therefore, in this embodiment, the negative pressure adsorption fixing device can simultaneously provide two charging methods: charging via the solar panel 40 and charging via an external power source, improving the reliability of the negative pressure adsorption fixing device during nighttime trips and trips on cloudy or rainy days.

[0050] Further, please refer to Figure 5 , Figure 6 The negative pressure adsorption fixing device also includes a first charging circuit 71, a second charging circuit 72, and a comparator 73. The first charging circuit 71 includes a first switch module 711, which is used to connect to the solar panel 40. The second charging circuit 72 includes a second switch module 721, which is used to connect to an external power source.

[0051] One end of the first switch module 711 is connected to the solar panel 40, and the other end is connected to the battery. One end of the second switch module 721 is connected to an external power source, and the other end is connected to the battery. The first input terminal of the comparator 73 is connected to the first charging circuit 71, and the second input terminal of the comparator 73 is connected to the second charging circuit 72. The output terminal of the comparator 73 is used to output the comparison result, which can be a comparison of the charging current of the first charging circuit 71 and the charging current of the second charging circuit 72. The first switch module 711 closes or opens in response to the comparison result of the comparator 73, and the second switch module 721 closes or opens in response to the comparison result of the comparator 73.

[0052] For example, when the solar panel 40 is charging the battery and the user is not connected to an external power source, the charging current of the first charging circuit 71 is greater than the charging current of the second charging circuit 72. The comparator 73 outputs a first comparison result, the first switch module 711 closes in response to the first comparison result of the comparator 73, and the second switch module 721 opens in response to the second comparison result of the comparator 73. When an external power source is connected, the charging current of the second charging circuit 72 is greater than the charging current of the first charging circuit 71. The comparator 73 outputs a second comparison result, the first switch module 711 opens in response to the first comparison result of the comparator 73, and the second switch module 721 closes in response to the second comparison result of the comparator 73. That is, when the user connects to an external power source, the second charging circuit 72 where the external power source is located is ensured to be connected, while the first charging circuit 71 where the solar panel 40 is located is disconnected, avoiding the simultaneous operation of the two charging methods.

[0053] Furthermore, the first charging circuit 71 further includes a first protection module 712, and the second charging circuit 72 further includes a second protection module 722. One end of the first protection module 712 is connected to the first switch module 711, and the other end of the first protection module 712 is connected to the battery. One end of the second protection module 722 is connected to the second switch module 721, and the other end of the second protection module 722 is connected to the battery. The first protection module 712 and the second protection module 722 are used to prevent reverse current. The first protection module 712 and the second protection module 722 can be, for example, diodes.

[0054] like Figure 7-9 In one embodiment, the negative pressure forming assembly 30 includes a drive member 31, a piston 32, and a cylinder 33. The cylinder 33 has an internal receiving cavity that communicates with a receiving cavity 11, and the piston 32 is disposed within the receiving cavity. The drive member 31 drives the piston 32 to move, thereby generating negative pressure within the receiving cavity 11. Since the negative pressure forming assembly 30 is driven by the drive member 31, the user can control whether the negative pressure forming assembly 30 is working by controlling the start and stop of the drive member 31.

[0055] The driving component 31 can be an electric motor. The output shaft of the electric motor can drive the cylinder piston 32 to move through a transmission mechanism, for example, by driving the cylinder piston 32 to move back and forth through a crank mechanism.

[0056] like Figure 2 , Figure 7-9In one embodiment, the negative pressure adsorption fixing device further includes an opening component 80. The opening component 80 includes a first movable part 81 and a switch element 82. One end of the first movable part 81 is disposed outside the receiving cavity 11, and the other end of the first movable part 81 is disposed inside the receiving cavity 11. The first movable part 81 is movable toward the interior of the receiving cavity 11 to activate the switch element 82, thereby activating the negative pressure forming component 30. Thus, the user can operate the first movable part 81 from outside the housing 10 to activate the negative pressure forming component 30, facilitating user operation of the first movable part 81 and allowing the user to decide when to perform negative pressure adsorption.

[0057] In one embodiment, the suction chamber 21 of the suction member 20 has a suction port 212 for abutting against the suction surface. The movement direction of the first movable part 81 is parallel to the axial direction of the suction port 212. When the suction member 20 is adsorbed onto the suction surface, the first movable part 81 can abut against the suction surface and move into the receiving cavity 11 under the pressure of the suction surface, thereby activating the negative pressure forming component 30. Thus, when the user presses the suction member 20 onto the suction surface, the first movable part 81 can be activated automatically, allowing the negative pressure forming component 30 and the user's pressing action to be performed simultaneously. The user does not need to operate the first movable part 81, thereby simplifying the activation process of the negative pressure forming component 30. Preferably, the portion of the first movable part 81 located outside the housing 10 is disposed inside the suction chamber 21 of the suction member 20. Of course, in other embodiments, the portion of the first movable part 81 located outside the housing 10 can also be disposed outside the suction chamber 21.

[0058] In one embodiment, the switch 82 is a two-way changeover switch, and the first movable part 81 can also move outward toward the receiving cavity 11 to activate the two-way changeover switch, thereby activating the negative pressure forming assembly 30. Since the suction member 20 may loosen during the suction process, when it does, the user needs to press the negative pressure adsorption fixing device again, which is inconvenient. By providing a two-way changeover switch, the first movable part 81 can activate the negative pressure forming assembly 30 when pressed or released, thereby preventing the suction member 20 from loosening and allowing it to adhere more stably to the adsorption surface.

[0059] like Figure 7-9In one embodiment, the negative pressure adsorption fixing device further includes an air intake assembly 90, which connects the receiving cavity 11 to the outside of the outer shell 10, allowing the suction member 20 to separate from the adsorption surface. By providing the air intake assembly 90, the user can actively and smoothly separate the suction member 20 from the adsorption surface. For example, the air intake assembly 90 includes a second movable part 91 and a blocking part. One end of the second movable part 91 is located outside the outer shell 10, and the other end is located inside the outer shell 10. When the second movable part 91 is subjected to pressure, it can move the blocking part to connect the air passage between the receiving cavity 11 and the outside of the outer shell 10.

[0060] In other embodiments, the negative pressure adsorption fixing device can also be activated by pressing a button to disconnect the circuit of the negative pressure forming component 30, thereby stopping the negative pressure forming component 30 from working and allowing the user to remove the suction member 20 from the adsorption surface.

[0061] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. A negative pressure adsorption fixing device, characterized in that, include: An outer casing, the interior of which has a receiving cavity; A holding element, the holding element being used to adhere to the adsorption surface; The end of the holding member away from the outer shell is provided with an adsorption cavity, which is in communication with the receiving cavity; the adsorption cavity is used to cooperate with the adsorption surface to form a sealed space. A negative pressure forming component is used to generate negative pressure in the receiving cavity to create negative pressure in the sealed space. A solar panel, the solar panel being mounted on the housing, the solar panel having a light-absorbing surface, at least a portion of the light-absorbing surface being exposed outside the housing, the solar panel being used to convert solar energy into electrical energy; The system includes a battery and a charging interface. The battery powers the negative pressure forming assembly and stores the electrical energy converted by the solar panel. The charging interface is connected to an external power source to power the battery. It also includes a first charging circuit, a second charging circuit, and a comparator. The first charging circuit includes a first switching module and is used to connect to the solar panel. The second charging circuit includes a second switching module and is used to connect to the external power supply. One end of the first switch module is connected to the solar panel, and the other end of the first switch module is used to connect to the battery; one end of the second switch module is connected to the external power supply, and the other end of the second switch module is used to connect to the battery; the first input terminal of the comparator is connected to the first charging circuit, the second input terminal of the comparator is connected to the second charging circuit, and the output terminal of the comparator is used to output the comparison result; the first switch module closes or opens in response to the comparison result of the comparator, and the second switch module closes or opens in response to the comparison result of the comparator.

2. The negative pressure adsorption fixing device according to claim 1, characterized in that, The outer casing has a first end face and a second end face that are opposite to each other along the axial direction of the outer casing; the suction member is installed on the first end face of the outer casing, the cavity wall of the suction cavity is provided with a first connecting hole, and the first end face of the outer casing is provided with a second connecting hole; the suction cavity is connected to the receiving cavity through the first connecting hole and the second connecting hole; the solar panel is installed on the second end face of the outer casing.

3. The negative pressure adsorption fixing device according to claim 2, characterized in that, A mounting groove is provided on the second end face; the solar panel is installed in the mounting groove, and the light-absorbing surface of the solar panel is flush with the second end face.

4. The negative pressure adsorption fixing device according to claim 2, characterized in that, The solar panel is rotatably mounted on the second end face, and the solar panel can be raised or lowered relative to the second end face by rotation to adjust the angle of the solar panel.

5. The negative pressure adsorption fixing device according to claim 1, characterized in that, It also includes a magnetic component, which is mounted on the housing and is used to magnetically attract the component to be fixed.

6. The negative pressure adsorption fixing device according to claim 5, characterized in that, The magnetic component is mounted on the side of the solar panel away from the outer casing, and the magnetic component exposes at least a portion of the light-absorbing surface.

7. The negative pressure adsorption fixing device according to claim 6, characterized in that, The magnetic component is ring-shaped or arc-shaped.

8. The negative pressure adsorption fixing device according to claim 1, characterized in that, The first charging circuit further includes a first protection module, and the second charging circuit further includes a second protection module; one end of the first protection module is connected to the first switch module, and the other end of the first protection module is connected to the battery; one end of the second protection module is connected to the second switch module, and the other end of the second protection module is connected to the battery; the first protection module and the second protection module are used to prevent reverse current.

9. The negative pressure adsorption fixing device according to claim 1, characterized in that, The negative pressure forming assembly includes a driving member, a cylinder plug, and a cylinder barrel. The cylinder barrel has a receiving cavity inside, which communicates with the receiving cavity. The cylinder plug is disposed in the receiving cavity. The driving member is used to drive the cylinder plug to move the cylinder plug and generate negative pressure in the receiving cavity.

10. The negative pressure adsorption fixing device according to claim 1, characterized in that, It also includes an opening component, which includes a first movable part and a switch. One end of the first movable part is disposed outside the receiving cavity, and the other end of the first movable part is disposed inside the receiving cavity. The first movable part can move toward the inside of the receiving cavity to activate the switch, thereby activating the negative pressure forming component.

11. The negative pressure adsorption fixing device according to claim 10, characterized in that, The suction chamber of the holding member has an suction port, which is used to abut against the suction surface; the movement direction of the first movable part is parallel to the axial direction of the suction port; when the holding member is adsorbed on the suction surface, the first movable part can abut against the suction surface and move into the receiving cavity under the pressure of the suction surface.

12. The negative pressure adsorption fixing device according to claim 11, characterized in that, The switching element is a bidirectional changeover switch, and the first movable part can also move toward the outside of the receiving cavity to activate the bidirectional changeover switch and start the negative pressure forming assembly.

13. The negative pressure adsorption fixing device according to claim 1, characterized in that, It also includes an air intake assembly for communicating the receiving cavity with the outside of the housing, so that the suction member can be separated from the suction surface.

14. The negative pressure adsorption fixing device according to claim 13, characterized in that, The air intake assembly includes a second movable part, one end of which is disposed outside the housing and the other end of which is disposed inside the housing; the second movable part can open the air passage between the receiving cavity and the outside of the housing when subjected to pressure.

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