Negative-pressure suction fixing device

Abstract

A negative-pressure suction fixing device, comprising a housing (10), a suction holding member (20), a negative-pressure generating assembly (30) and a magnetic member (40). An accommodating cavity (11) is provided in the housing (10); the suction holding member (20) is mounted on the housing (10), and the suction holding member (20) is configured to adhere to a suction surface; the end of the suction holding member (20) away from the housing (10) is provided with a suction cavity (21), the suction cavity (21) being in communication with the accommodating cavity (11); the suction cavity (21) is configured to cooperate with the suction surface to form a sealed space; the negative-pressure generating assembly (30) is configured to generate a negative pressure in the accommodating cavity (11), thereby creating a negative pressure in the sealed space; and the magnetic member (40) is mounted on the housing (10), the magnetic member (40) is configured to magnetically adhere to a member to be fixed, and the magnetic member (40) can rotate relative to the housing (10), such that the magnetic member (40) moves closer to and away from the housing (10) through rotation, thereby adjusting the included angle between the magnetic member (40) and the housing (10).

Description

Negative pressure adsorption fixing device TECHNICAL FIELD

[0001] The present application relates to the technical field of holding device, in particular to a negative pressure adsorption fixing device. BACKGROUND

[0002] In the process of driving, drivers often use electronic devices to navigate the driving route. In the process of using electronic devices to navigate, the electronic devices need to be fixed. Usually, the electronic devices can be fixed on the vehicle body by the adsorption device. The adsorption device can be adsorbed on more positions of the vehicle body because it is adsorbed on the vehicle body by negative pressure. After the adsorption device is adsorbed on the vehicle body, the adsorption device can be detachably connected with the electronic device to fix the electronic device on the adsorption device.

[0003] However, after the current adsorption device is connected with the electronic device, the angle of the electronic device relative to the driving position is unique and cannot be adjusted. When the user wants to adjust the angle of the electronic device relative to the driving position, the adsorption device has to be detached from the vehicle body, and the position of the adsorption device adsorbed on the vehicle body has to be adjusted, which is troublesome for the user. Moreover, even if the position of the adsorption device adsorbed on the vehicle body is adjusted, the angle of the electronic device relative to the driving position is still limited due to the structure of the vehicle body, and the user cannot adjust the angle of the electronic device relative to the driving position in a large range. CONTENT OF THE INVENTION

[0004] The present application mainly provides a negative pressure adsorption fixing device, which can solve the problem that the angle of the fixed part relative to the adsorption surface is difficult to adjust when the negative pressure adsorption fixing device fixes the fixed part.

[0005] In order to solve the above technical problem, the present application provides a negative pressure adsorption fixing device, which comprises a shell, a holding part, a negative pressure forming assembly and a magnetic part. The inside of the shell has a receiving cavity; the holding part is installed on the shell and is used to be adsorbed on the adsorption surface; the end of the holding part away from the shell is provided with an adsorption cavity, and the adsorption cavity is in communication with the receiving cavity; the adsorption cavity is used to cooperate with the adsorption surface to form a sealed space; the negative pressure forming assembly is used to generate negative pressure in the receiving cavity to form negative pressure in the sealed space; the magnetic part is installed on the shell; the magnetic part is used to be magnetically adsorbed with the fixed part; and the magnetic part can rotate relative to the shell to rotate the magnetic part relative to the shell to approach and move away from the shell, so as to adjust the included angle between the magnetic part and the shell.

[0006] In one embodiment, the shell has opposite first and second ends along the axial direction of the shell, the holding part is installed on the first end of the shell, and the magnetic part is installed on the second end of the shell.

[0007] In one embodiment, the magnetic part rotates relative to the shell along the rotation axis, and the axial direction of the rotation axis is perpendicular to the axial direction of the shell.

[0008] In an embodiment, the negative pressure adsorption fixing device further comprises a rotating member, the rotating member is rotatably connected with the shell through a rotating shaft; and the magnetic member is fixedly installed on the rotating member.

[0009] In an embodiment, the rotating member is provided with a groove on a side away from the shell, and at least part of the magnetic member is installed in the groove.

[0010] In an embodiment, the rotating member has a first connecting portion and an installation portion, the shell is provided with a second connecting portion, the first connecting portion is rotatably connected with the second connecting portion through the rotating shaft; and the magnetic member is fixedly installed on the installation portion.

[0011] In an embodiment, the negative pressure adsorption fixing device further comprises a solar panel and a battery, the solar panel is installed on the shell, the solar panel has a light absorption surface, at least part of the light absorption surface is exposed to the shell, 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 the battery can store the electric energy converted by the solar panel.

[0012] In an embodiment, the magnetic member is installed on a side of the solar panel away from the shell, and the magnetic member exposes at least part of the light absorption surface.

[0013] In an embodiment, the magnetic member is annular or arc-shaped.

[0014] In an embodiment, the negative pressure forming assembly comprises a driving member, a cylinder plug and a cylinder barrel, the cylinder barrel has an accommodating cavity in the inside, the accommodating cavity is communicated with the containing cavity, and the cylinder plug is arranged in the accommodating cavity; the driving member is used for driving the cylinder plug to make the cylinder plug suck, so that the negative pressure is generated in the containing cavity.

[0015] In an embodiment, the negative pressure adsorption fixing device further comprises an opening assembly, the opening assembly comprises a first movable portion and a switch member, one end of the first movable portion is arranged outside the containing cavity, and the other end of the first movable portion is arranged in the containing cavity; the first movable portion can move towards the inside of the containing cavity to touch the switch member, so that the negative pressure forming assembly is started.

[0016] In an embodiment, the adsorption cavity of the adsorption member has an adsorption port, the adsorption port is used for abutting on the adsorption surface; the movement direction of the first movable portion is parallel to the axis direction of the adsorption port; when the adsorption member is adsorbed on the adsorption surface, the first movable portion can abut on the adsorption surface to move towards the inside of the containing cavity under the pressure of the adsorption surface.

[0017] In an embodiment, the switch member is a two-way conversion switch, the first movable portion can also move towards the outside of the containing cavity to touch the two-way conversion switch, so that the negative pressure forming assembly is started.

[0018] In an embodiment, the negative pressure adsorption fixing device further comprises an air inlet assembly for connecting the accommodating cavity with the outside of the shell, so that the adsorption member can be separated from the adsorption surface.

[0019] In an embodiment, the air inlet assembly comprises a second movable part, one end of the second movable part is arranged outside the shell, and the other end of the second movable part is arranged inside the shell; the second movable part can open the air path between the accommodating cavity and the outside of the shell when subjected to a pressing force.

[0020] The application provides a negative pressure adsorption fixing device, which comprises a shell, an adsorption member, a negative pressure forming assembly and a magnetic member. The inside of the shell has an accommodating cavity; the adsorption member is installed on the shell and is used for adsorbing on an adsorption surface; one end of the adsorption member away from the shell is provided with an adsorption cavity, and the adsorption cavity is connected with the accommodating cavity; the adsorption cavity is used for cooperating with the adsorption surface to form a sealed space; the negative pressure forming assembly is used for generating negative pressure in the accommodating cavity, so that the sealed space forms negative pressure; the magnetic member is installed on the shell; the magnetic member is used for magnetically adsorbing on a to-be-fixed member; and the magnetic member can rotate relative to the shell, so that the magnetic member rotates relative to the shell to approach and move away from the shell, so as to adjust the included angle between the magnetic member and the shell. The negative pressure adsorption fixing device of the application can realize the detachable connection of the negative pressure adsorption fixing device and the to-be-fixed member by installing the magnetic member on the shell, so that the magnetic member can magnetically adsorb on the to-be-fixed member. In addition, the magnetic member can rotate relative to the shell to adjust the included angle between the magnetic member and the shell, so that the to-be-fixed member connected with the magnetic member can be adjusted relative to the adsorption surface without dismounting the adsorption member, so as to meet the needs of users to conveniently and widely adjust the angle of the to-be-fixed member relative to the adsorption surface. BRIEF DESCRIPTION OF DRAWINGS

[0021] FIG. 1 is a structural schematic diagram of the negative pressure adsorption fixing device from one perspective according to an embodiment of the application;

[0022] FIG. 2 is a structural schematic diagram of the negative pressure adsorption fixing device from another perspective according to an embodiment of the application;

[0023] FIG. 3 is a structural schematic diagram of the rotation of the magnetic member according to an embodiment of the application;

[0024] FIG. 4 is an exploded structural schematic diagram of FIG. 3;

[0025] FIG. 5 is an exploded structural schematic diagram of FIG. 1;

[0026] FIG. 6 is a structural schematic diagram of the negative pressure adsorption fixing device without the adsorption member according to an embodiment of the application;

[0027] FIG. 7 is a structural schematic diagram of the lower shell, the negative pressure forming assembly, the opening assembly and the air inlet assembly according to an embodiment of the application;

[0028] Fig. 8 is a structural schematic view of a negative pressure forming assembly, an opening assembly, and an air inlet assembly according to an embodiment of the present application;

[0029] Fig. 9 is a structural schematic view of a negative pressure forming assembly (exploded view), an opening assembly, and an air inlet assembly according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] The application will be further described in details through specific embodiments and with reference to the drawings. In different embodiments, similar elements are denoted by similar reference numerals. In the following embodiments, many details are described in order to make the application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different cases, or can be replaced by other elements, materials, or methods. In some cases, some operations related to the application are not shown or described in the specification in order to avoid the core of the application being overwhelmed by too many descriptions, and those skilled in the art can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0031] In addition, the features, operations, or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. Meanwhile, the steps or actions in the method description can also be sequentially adjusted or adjusted in a manner that is obvious to those skilled in the art. Therefore, the order in the specification and the drawings is only for the purpose of clearly describing a certain embodiment, and does not mean that it is the necessary order, unless otherwise stated that a certain order must be followed.

[0032] In this paper, the serial numbers of components, such as "first", "second", etc., are only used to distinguish the described objects, and have no order or technical meaning. Unless otherwise specified, "connection" and "coupling" in this application include direct and indirect connection (coupling).

[0033] The present application provides a negative pressure adsorption fixing device. The negative pressure adsorption fixing device can be used for adsorption on an adsorption surface. In one application scenario, the negative pressure adsorption fixing device can be used in a vehicle environment, and the electronic device can be fixed on the negative pressure adsorption fixing device through a magnetic attraction piece, so that the user can watch the content displayed by the electronic device. Of course, the negative pressure adsorption fixing device is not limited to be applied in the vehicle environment, but can be applied in any application scenario that needs to fix a to-be-fixed piece.

[0034] As shown in FIG. 1, 2 and 5, the negative pressure adsorption fixing device comprises a shell 10, an adsorption piece 20, a negative pressure forming assembly 30 and a magnetic piece 40. The shell 10 has a receiving cavity 11 inside. Specifically, the shell 10 can comprise an upper shell 12 and a lower shell 13, which are detachably connected and cooperate to form the receiving cavity 11.

[0035] The adsorption piece 20 is installed on the shell 10 and is used to be adsorbed on an adsorption surface. The adsorption piece 20 can be installed on the end surface of the shell 10 in the axial direction, or can be installed on the annular side wall of the shell 10. As shown in FIG. 2, the adsorption piece 20 is provided with an adsorption cavity 21 at the end away from the shell 10, and the adsorption cavity 21 is in communication with the receiving cavity 11, that is, the gas pressure inside the adsorption cavity 21 is the same as that of the receiving cavity 11. The adsorption cavity 21 is used to form a sealed space with the adsorption surface.

[0036] As shown in FIG. 2 and FIG. 5, the negative pressure forming assembly 30 is used to generate negative pressure in the receiving cavity 11. Since the receiving cavity 11 is in communication with the sealed space, the negative pressure forming assembly 30 can form negative pressure in the sealed space to generate negative pressure adsorption of the adsorption piece 20. The negative pressure forming assembly 30 can stably generate negative pressure in the sealed space by energization. Compared with natural adsorption (such as by extruding air in the sealed space to make the adsorption piece 20 adsorbed on the adsorption surface), the negative pressure forming assembly 30 generates negative pressure in a more stable and reliable manner.

[0037] As shown in FIG. 1-4, the magnetic piece 40 is installed on the shell 10. The magnetic piece 40 is used to be magnetically adsorbed with a to-be-fixed piece. In the application of fixing electronic equipment, the adsorption piece 20 can be used to adsorb the vehicle body, and the magnetic piece 40 can be used to magnetically adsorb the electronic equipment. Of course, the magnetic piece 40 can be used to magnetically adsorb the vehicle body, and the adsorption piece 20 can be used to adsorb the electronic equipment. Generally, the shell of the electronic equipment is made of metal material, and the metal material shell can be magnetically adsorbed with the magnetic piece 40, or the electronic equipment has a metal piece or a magnetic adsorption piece inside, which can be magnetically adsorbed with the magnetic piece 40. This embodiment can reliably connect the electronic equipment with the negative pressure adsorption fixing device by taking advantage of the characteristics of the electronic equipment.

[0038] Please refer to FIG. 1-3, the magnetic member 40 can rotate relative to the shell 10 to make the magnetic member 40 rotate relative to the shell 10 to approach and move away from the shell 10 to adjust the included angle between the magnetic member 40 and the shell 10. Since the shell 10 is fixed on the adsorption surface by the holding member 20, the shell 10 and the adsorption surface are relatively fixed, so the rotation of the magnetic member 40 relative to the shell 10 is the rotation of the magnetic member 40 relative to the adsorption surface, and the rotation of the magnetic member 40 can adjust the angle between the magnetic member 40 and the adsorption surface. In the vehicle environment, when the shell 10 is fixed on the vehicle body by the holding member 20, the user can adjust the angle of the electronic device fixed on the magnetic member 40 relative to the driving position by driving the magnetic member 40 to rotate relative to the shell 10, so that the user can select the angle of the display screen of the electronic device facing the user, and this adjustment method does not need to disassemble the negative pressure adsorption fixing device to adjust the angle of the electronic device, which brings convenience to the user. And the rotation angle of the magnetic member 40 relative to the shell 10 is large, and the angle of the electronic device relative to the user is not too limited by the structure of the vehicle body itself, which can meet the user's demand for adjusting the angle of the to-be-fixed member relative to the driving position in a large range.

[0039] Therefore, the negative pressure adsorption fixing device of the present application can realize the detachable connection of the negative pressure adsorption fixing device and the to-be-fixed member by installing the magnetic member 40 on the shell 10, and the magnetic member 40 can be magnetically connected with the to-be-fixed member. The to-be-fixed member can also rotate at any angle along the contact surface of the magnetic adsorption, so that the relative position of the negative pressure adsorption fixing device and the to-be-fixed member changes more.

[0040] And by setting the magnetic member 40 to rotate relative to the shell 10 to adjust the included angle between the magnetic member 40 and the shell 10, the angle of the to-be-fixed member connected with the magnetic member 40 relative to the adsorption surface can be adjusted without disassembling the negative pressure adsorption fixing device, thereby meeting the user's demand for adjusting the angle of the to-be-fixed member relative to the adsorption surface in a large range.

[0041] Please refer to FIG. 5 and FIG. 6, in an embodiment, the shell 10 has opposite first end 14 and second end 15 along the axial direction of the shell 10. The holding member 20 is installed on the first end 14 of the shell 10, and the magnetic member 40 is installed on the second end 15 of the shell 10. Wherein, the first end 14 includes a first end face 141 and a partial annular side wall of the shell 10 close to the first end face 141, and the second end 15 includes a second end face 151 and a partial annular side wall of the shell 10 close to the second end face 151. In an embodiment, as shown in FIG. 2 and FIG. 6, the holding member 20 is installed on the first end face 141 of the shell 10, the cavity wall of the adsorption cavity 21 is provided with a first communication hole 211, and the first end face 141 of the shell 10 is provided with a second communication hole 1411. The adsorption cavity 21 is in communication with the accommodation cavity 11 through the first communication hole 211 and the second communication hole 1411. By installing the holding member 20 and the magnetic member 40 on the two ends of the shell 10 respectively, generally, the holding member 20 will be held on the adsorption surface, the position of the magnetic member 40 is farther away from the adsorption surface, the magnetic member 40 is not easily interfered by the adsorption surface when rotating, and the angle of rotation of the magnetic member 40 can be designed to be larger.

[0042] Wherein, the magnetic member 40 rotates relative to the shell 10 along the rotation axis, and the axial direction of the rotation axis is perpendicular to the axial direction of the shell 10. In an embodiment, the shell 10 is substantially cylindrical, and the axial direction of the rotation axis is perpendicular to the axial direction of the cylinder. Wherein, the rotation angle a of the relative rotation between the magnetic member 40 and the shell 10 can be 0 < a ≤ 270 degrees. In an embodiment, the second end face 151 of the shell 10 is provided as a plane, the magnetic member 40 is stacked on the second end face 151 in the initial state, and the angle between the side of the magnetic member 40 close to the second end face 151 and the second end face 151 is 0; when the magnetic member 40 rotates from the initial state, the magnetic member 40 rotates towards the direction away from the second end face 151.

[0043] As shown in FIG. 1-4, in an embodiment, the negative pressure adsorption fixing device further comprises a rotating member 50, and the rotating member 50 is rotatably connected with the shell 10 through a rotation axis. The magnetic member 40 is fixedly installed on the rotating member 50. Since it is difficult to change the structure of the magnetic member 40 to install the rotation axis, this embodiment adopts the mode of fixing the magnetic member 40 on the rotating member 50, so that the magnetic member 40 can be rotatably connected with the shell 10. Wherein, the mode of installing the magnetic member 40 on the rotating member 50 can be non-detachable connection or detachable connection. In an embodiment, the side of the rotating member 50 away from the shell 10 is provided with a groove 51, and at least part of the magnetic member 40 is installed in the groove 51. A cover body can be provided on the groove 51, and the cover body can be used as a protective cover to protect the magnetic member 40 inside the rotating member 50. In other embodiments, the magnetic member 40 can also be embedded in the rotating member 50, or the magnetic member 40 can also be arranged on the surface of the rotating member 50 through adhesive or the like.

[0044] In an embodiment, as shown in FIG. 4, the rotating member 50 has a first connecting portion 511 and a mounting portion 512, and the shell 10 is provided with a second connecting portion 16, and the first connecting portion 511 is rotatably connected with the second connecting portion 16 through a rotating shaft. The magnetic member 40 is fixedly mounted on the mounting portion 512. Among them, the first connecting portion 511 can be arranged on the side wall of the mounting portion 512, and the second connecting portion 16 can be arranged on the side wall of the shell 10, so that in the initial state (FIG. 1), the side of the rotating member 50 close to the second end face 151 can be better attached to the second end face 151, so that in the initial state, the negative pressure adsorption fixing device is relatively compact as a whole, which is convenient for storage and carrying.

[0045] In an embodiment, as shown in FIG. 5, the negative pressure adsorption fixing device further comprises a solar panel 60 and a battery. The solar panel 60 is mounted on the shell 10. The solar panel 60 is an element capable of converting solar energy into electrical energy. The solar panel 60 has a light absorption surface 61, at least part of which is exposed to the shell 10. The battery is used to supply power to the negative pressure forming assembly 30, and the battery can store the electrical energy converted by the solar panel 60. Thus, the solar panel 60 can convert solar energy into electrical energy during the day and store it in the battery, which can improve the problem of insufficient battery endurance of the negative pressure adsorption fixing device, and the user does not need to charge the power frequently, improving the user's experience.

[0046] Further, the solar panel 60 is mounted on the second end face 151, the magnetic member 40 can be mounted on the side of the solar panel 60 away from the shell 10, and the magnetic member 40 exposes at least part of the light absorption surface 61, so that in the initial state, the magnetic member 40 also does not block the light absorption surface 61, so that the solar panel 60 can work. Based on this, the magnetic member 40 can be designed as a ring or an arc. For example, in the embodiment of FIG. 1, the magnetic member 40 and the mounting portion 512 of the rotating member 50 are both designed as a circular ring.

[0047] As shown in FIGS. 7-9, in an embodiment, the negative pressure forming assembly 30 comprises a driving member 31, a cylinder plug 32 and a cylinder barrel 33. The cylinder barrel 33 has an accommodating cavity in the inside, the accommodating cavity is communicated with the receiving cavity 11, and the cylinder plug 32 is arranged in the accommodating cavity. The driving member 31 is used to drive the cylinder plug 32, so that the cylinder plug 32 is extracted, and negative pressure is generated in the receiving cavity 11. Since the negative pressure forming assembly 30 is driven by the driving member 31, the user can control whether the negative pressure forming assembly 30 works by controlling the start and stop of the driving member 31.

[0048] Among them, the driving member 31 can be a motor. The output shaft of the motor can drive the cylinder plug 32 to move through a transmission mechanism, for example, the cylinder plug 32 can be driven to reciprocate through a crank mechanism.

[0049] As shown in FIG. 2, FIG. 7-9, in an embodiment, the negative pressure adsorption fixing device further comprises an opening assembly 70. The opening assembly 70 comprises a first movable part 71 and a switch 72. One end of the first movable part 71 is arranged outside the accommodating cavity 11, and the other end of the first movable part 71 is arranged inside the accommodating cavity 11. The first movable part 71 is capable of moving towards the inside of the accommodating cavity 11 to touch the switch 72 to start the negative pressure forming assembly 30. Thus, the user can operate the first movable part 71 from the outside of the shell 10 to start the negative pressure forming assembly 30, which is convenient for the user to operate the first movable part 71, and the user can also decide when to adsorb.

[0050] In an embodiment, the adsorption cavity 21 of the adsorption part 20 has an adsorption port for abutting against the adsorption surface. The moving direction of the first movable part 71 is parallel to the axis direction of the adsorption port. When the adsorption part 20 is adsorbed on the adsorption surface, the first movable part 71 can abut against the adsorption surface to be moved towards the inside of the accommodating cavity 11 by the pressure of the adsorption surface, thereby starting the negative pressure forming assembly 30. Thus, when the user presses the adsorption part 20 on the adsorption surface, the first movable part 71 can be automatically started, and the negative pressure forming assembly 30 can be started simultaneously with the pressing action of the user. The user does not need to operate the first movable part 71, thereby simplifying the starting process of the negative pressure forming assembly 30. Preferably, the part of the first movable part 71 located outside the shell 10 is arranged inside the adsorption cavity 21 of the adsorption part 20. Of course, in other embodiments, the part of the first movable part 71 located outside the shell 10 can be arranged outside the adsorption cavity 21.

[0051] In an embodiment, the switch 72 is a two-way switch, and the first movable part 71 is also capable of moving towards the outside of the accommodating cavity 11 to touch the two-way switch to start the negative pressure forming assembly 30. Since the adsorption part 20 can be loosened during the adsorption process, the user needs to press the negative pressure adsorption fixing device again when the adsorption part 20 is loosened, which is troublesome. By arranging the two-way switch, the first movable part 71 can start the negative pressure forming assembly 30 when it is pressed or released, thereby preventing the adsorption part 20 from being loosened and making the adsorption part 20 more stably adsorbed on the adsorption surface.

[0052] As shown in FIGS. 7-9, in one embodiment, the negative pressure adsorption fixing device further comprises an air inlet assembly 80 for connecting the receiving cavity 11 with the outside of the shell 10, so that the adsorption member 20 can be separated from the adsorption surface. By providing the air inlet assembly 80, the user can actively and smoothly separate the adsorption member 20 from the adsorption surface. For example, the air inlet assembly 80 comprises a second movable part 81 and a blocking part, one end of the second movable part 81 is arranged outside the shell 10, and the other end of the second movable part 81 is arranged inside the shell 10; the second movable part 81 can move the blocking part to connect the air path between the receiving cavity 11 and the outside of the shell 10 when subjected to a pressing force.

[0053] In other embodiments, the negative pressure adsorption fixing device can also be taken off by pressing the button, disconnecting the circuit of the negative pressure forming assembly 30, and stopping the negative pressure forming assembly 30 from working, so that the user can take the adsorption member 20 off from the adsorption surface.

[0054] The above application of specific examples to illustrate the present application, is only used to help understand the present application, and is not used to limit the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A negative pressure suction fixing device characterized by comprising: The application relates to a negative pressure adsorption fixing device. The device comprises a shell, an adsorption cavity in the shell, an adsorption piece installed on the shell and used for adsorbing on an adsorption surface, an adsorption cavity provided at the end of the adsorption piece away from the shell and communicated with the adsorption cavity, a negative pressure forming assembly used for generating negative pressure in the adsorption cavity to form negative pressure in the closed space, and a magnetic piece installed on the shell and used for magnetically adsorbing on a piece to be fixed. The shell has opposite first and second ends along the axial direction of the shell, the adsorption piece is installed on the first end of the shell, and the magnetic piece is installed on the second end of the shell. The magnetic piece and the shell are relatively rotated along a rotating shaft, and the axial direction of the rotating shaft is perpendicular to the axial direction of the shell. The negative pressure adsorption fixing device further comprises a rotating piece rotatably connected with the shell through a rotating shaft, and the magnetic piece is fixedly installed on the rotating piece.

2. The negative pressure suction fixing device according to claim 1, wherein The side of the rotating piece away from the shell is provided with a groove, and at least part of the magnetic piece is installed in the groove.

3. The negative pressure suction fixing device according to claim 2, wherein The rotating piece has a first connecting part and a mounting part, the shell is provided with a second connecting part, the first connecting part is rotatably connected with the second connecting part through the rotating shaft, and the magnetic piece is fixedly installed on the mounting part.

4. The negative pressure suction fixing device according to claim 1, wherein The device further comprises a solar panel and a battery, the solar panel is installed on the shell, has a light absorption surface, and at least part of the light absorption surface is exposed to the shell, 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 the battery can store the electric energy converted by the solar panel.

5. The negative pressure suction fixing device according to claim 4, wherein The magnetic piece is installed on the side of the solar panel away from the shell, and at least part of the light absorption surface is exposed.

6. The negative pressure suction fixing device according to claim 4, wherein The magnetic piece is annular or arc-shaped.

7. The negative pressure suction fixing device according to claim 1, wherein The negative pressure forming assembly comprises a driving piece, a cylinder plug and a cylinder barrel, the cylinder barrel has an accommodating cavity in the inside, the accommodating cavity is communicated with the adsorption cavity, the cylinder plug is arranged in the accommodating cavity, and the driving piece is used for driving the cylinder plug to generate negative pressure in the adsorption cavity.

8. The negative pressure suction fixing device according to claim 7, wherein The device further comprises an opening assembly, the opening assembly comprises a first movable part and a switch piece, one end of the first movable part is arranged outside the adsorption cavity, the other end of the first movable part is arranged in the adsorption cavity, the first movable part can move towards the inside of the adsorption cavity to touch the switch piece to start the negative pressure forming assembly.

9. The negative pressure suction fixing device according to claim 8, wherein The adsorption cavity of the adsorption piece has an adsorption port used for abutting on the adsorption surface, the movement direction of the first movable part is parallel to the axial direction of the adsorption port, when the adsorption piece is adsorbed on the adsorption surface, the first movable part can abut on the adsorption surface to be moved towards the inside of the adsorption cavity under the pressure of the adsorption surface.

10. The negative pressure suction fixing device according to claim 1, wherein ​ 11. The negative pressure suction fixing device according to claim 1, wherein ​ 12. The negative pressure suction fixing device according to claim 11, wherein ​ 13. The negative pressure suction fixing device according to claim 12, wherein The switch is a bidirectional switch, and the first movable part is further movable towards the outside of the accommodating cavity to trigger the bidirectional switch to start the negative pressure forming assembly.

14. The negative pressure suction fixing device according to claim 1, wherein An air inlet assembly is further included for connecting the accommodating cavity with the outside of the shell to enable the holding part to be separated from the adsorption surface.

15. The negative pressure suction fixture according to claim 14, wherein The air inlet assembly includes a second movable part, one end of which is arranged outside the shell and the other end of which is arranged inside the shell, and the second movable part is capable of opening an air passage between the accommodating cavity and the outside of the shell when pressed.

Images