Magnetic shielding device

Abstract

The utility model discloses a magnetic shielding device which comprises a box body with an opening in the upper end and a box cover covering the opening of the box body. A plurality of layers of storage boxes which are arranged in a stacked mode and provided with openings in the upper ends are arranged in the box body, and the bottom of the storage box on the upper layer completely covers the opening of the storage box on the lower layer. The magnetic shielding device can be used for storing electronic elements sensitive to a magnetic field, such as a circulator and a filter; by arranging the box body with the opening in the upper end and the box cover covering the opening of the box body, interference of an external magnetic field is avoided, space can be effectively utilized through the design of the multiple layers of stacked storage boxes, meanwhile, the bottom of the storage box on the upper layer completely covers the opening of the storage box on the lower layer, the structure can reduce spreading of the magnetic field between the storage boxes, and the storage effect is improved. And magnetic field interference among different storage boxes is reduced.

Description

Technical Field

[0001] This utility model relates to the field of quantum computer technology, and in particular to a magnetic shielding device for storing electronic components in quantum measurement and control circuits. Background Technology

[0002] A quantum computer is a physical device that performs high-speed mathematical and logical operations, stores and processes quantum information according to the laws of quantum mechanics. The main characteristics of quantum computers include high operating speed, strong information processing capabilities, and a wide range of applications. Among the many quantum computing technologies, the superconducting technology route shows great promise, and quantum computers developed based on this route have attracted significant attention from the industry.

[0003] In superconducting quantum computers, the quantum chip needs to operate at extremely low temperatures, typically around 10 mK, usually provided by a dilution refrigerator. The quantum chip is installed at the lowest temperature layer of the dilution refrigerator. To manipulate and measure the quantum chip at the bottom layer, circuits carrying quantum measurement and control signals must enter the dilution refrigerator, pass through each cold plate, and finally connect to the quantum chip in the lowest temperature region. These circuits used to manipulate and measure qubits are called quantum measurement and control circuits.

[0004] Quantum measurement and control circuits contain many electronic components that are extremely sensitive to magnetic fields, such as circulators and filters. The performance of these components can be severely affected by interference from external magnetic fields. Therefore, there is an urgent need to provide a magnetic shielding device that places these sensitive components in a specialized magnetic shielding device before installation to ensure that their performance is not affected by external magnetic fields, thereby guaranteeing the stability and reliability of the quantum measurement and control circuit.

[0005] It should be noted that the information disclosed in the background section of this application is intended only to enhance the understanding of the general background of this application, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a magnetic shielding device for storing electronic components that are extremely sensitive to magnetic fields.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] This utility model provides a magnetic shielding device, including a box with an opening at the top and a box cover covering the opening of the box;

[0009] The box contains multiple stacked storage boxes with open tops, the bottom of the upper storage box completely covering the opening of the lower storage box.

[0010] In addition to the magnetic shielding device described above, the storage box is further provided with a positioning plate on its peripheral wall that abuts against the inner wall of the box.

[0011] In addition to the magnetic shielding device described above, the storage box is further provided with a plurality of positioning plates on its peripheral wall, and the included angle between adjacent positioning plates is 90°.

[0012] In the magnetic shielding device described above, the positioning plate has a notch on the side near the inner wall of the box.

[0013] In addition to the magnetic shielding device described above, the storage box is further provided with multiple partitions to divide the storage box into multiple independent storage spaces with openings at the top.

[0014] In the magnetic shielding device described above, the storage box is further defined as a cuboid with an open top, and multiple partitions are evenly spaced along both the length and width directions within the cuboid to divide the storage box into multiple independent storage spaces with open tops.

[0015] In the magnetic shielding device described above, a wave-absorbing material layer is further provided between the inner wall of the box and the outer wall of the storage box; and / or, the outer wall of the box is coated with a copper or aluminum coating.

[0016] In the magnetic shielding device described above, the housing, the lid, and the storage box are all made of permalloy.

[0017] And / or, the thickness of the box body and the box cover is not less than 1mm.

[0018] In addition to the magnetic shielding device described above, a sealing structure is provided at the connection between the box body and the box cover.

[0019] In the magnetic shielding device described above, handles are further provided on the two opposite sides of the housing and / or on the housing cover; and / or, hand-held through holes are provided on the positioning plate.

[0020] The beneficial effects of this utility model are as follows:

[0021] The magnetic shielding device of this embodiment can be used to store electronic components that are extremely sensitive to magnetic fields, such as circulators and filters. The electronic components are stored in storage boxes within the magnetic shielding device. By providing a box with an opening at the top and a lid covering the opening of the box, interference from external magnetic fields is avoided. The multi-layer stacked storage box design can effectively utilize space. At the same time, the bottom of the upper storage box completely covers the opening of the lower storage box. This structure can reduce the propagation of magnetic fields between storage boxes and reduce magnetic field interference between different storage boxes. Attached Figure Description

[0022] Figure 1 A three-dimensional structural schematic diagram of the magnetic shielding device provided in the embodiment of this utility model;

[0023] Figure 2 An exploded view of the magnetic shielding device provided in an embodiment of this utility model;

[0024] Figure 3 A schematic diagram of the structure of the storage box provided in an embodiment of this utility model;

[0025] In the attached diagram, the following are the reference numerals: 10, box body; 20, box lid; 30, storage box; 40, positioning plate; 41, hand-held through hole; 42, notch; 50, partition; 60, handle. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0027] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] Figure 1 A three-dimensional structural schematic diagram of the magnetic shielding device provided in the embodiment of this utility model; Figure 2 An exploded view of the magnetic shielding device provided in an embodiment of this utility model; Figure 3 This is a schematic diagram of the structure of the storage box provided in an embodiment of the present utility model; as shown. Figure 1 , Figure 2 and Figure 3 As shown: This application discloses a magnetic shielding device, including a box 10 with an open top and a box cover 20 covering the opening of the box 10; the box 10 has multiple stacked storage boxes 30 with open tops, and the bottom of the upper storage box 30 completely covers the opening of the lower storage box 30.

[0030] The magnetic shielding device of this embodiment can be used to store electronic components that are extremely sensitive to magnetic fields, such as circulators and filters. The electronic components are stored in the storage box 30 of the magnetic shielding device. By providing a box 10 with an opening at the top and a box cover 20 covering the opening of the box 10, interference from external magnetic fields is avoided. The multi-layer stacked storage box 30 design can effectively utilize space. At the same time, the bottom of the upper storage box 30 completely covers the opening of the lower storage box 30. This structure can reduce the propagation of magnetic fields between storage boxes 30 and reduce magnetic field interference between different storage boxes 30.

[0031] In this embodiment, the shape of the box 10 is not specifically limited, and can be a cuboid with an open top, a cylinder with an open top, or other suitable shapes; the shape of the lid 20 is not specifically limited, as long as it matches the shape of the opening at the top of the box 10 so as to cover the opening of the box 10.

[0032] In this embodiment, the connection method between the box body 10 and the box cover 20 is not specifically limited. It can be a bolt connection (for example, bolt holes are provided on the box body 10 and the box cover 20, and bolts are used to fix the box cover 20 to the box body 10), a snap-fit ​​connection (for example, a snap-fit ​​structure is designed on the box body 10 and the box cover 20 to fix the box cover 20 to the box body 10), or a sleeve connection (for example, ...). Figure 1 As shown, the box body 10 is a cuboid with an opening at the top, and the box lid 20 is a cuboid with an opening at the bottom. The inner wall of the opening of the box lid 20 matches the outer wall of the opening of the box body 10 so that the box lid 20 can be fitted onto the opening of the box body 10.

[0033] To ensure the airtightness of the magnetic shielding device and improve its magnetic shielding effect, in some embodiments of this example, a sealing structure is provided at the connection between the housing 10 and the cover 20. This sealing structure prevents external magnetic fields from leaking through the connection gaps, further improving the magnetic shielding effect. For example, the sealing structure can be a sealing ring located at the connection between the housing 10 and the cover 20. Specifically, a groove is designed on the connection surface of the housing 10 or the cover 20 to limit and fix the sealing ring. The sealing ring can be a hollow rubber tube or other elastic material. The limiting effect of the groove ensures the stability of the sealing ring at the connection, thereby improving the sealing effect. Alternatively, screws can be used to fix the housing 10 and the cover 20 together, causing the sealing ring to compress and deform, thus tightly fitting the connection between the housing 10 and the cover 20 and achieving a reliable seal. This structure effectively prevents electromagnetic leakage and improves the magnetic shielding effect.

[0034] In this embodiment, the shape of the storage box 30 is not specifically limited. It can be a cuboid with an open top, a cylinder with an open top, or other suitable shapes. In order to facilitate the placement of the storage box 30 inside the box body 10, the size of the storage box 30 is smaller than the size of the box body 10.

[0035] In this embodiment, the multi-layer storage boxes 30 disposed within the housing 10 can be stacked along the height direction of the housing 10, with one storage box 30 per layer or multiple storage boxes 30. For example, as shown... Figure 2 As shown, the box 10 is provided with three layers of storage boxes 30 stacked along the height direction of the box 10, with one storage box 30 on each layer.

[0036] To ensure the stability of the storage box 30 and improve the magnetic shielding effect, in some embodiments of this example, the peripheral wall of the storage box 30 is provided with a positioning plate 40 that abuts against the inner wall of the box 10. By setting the positioning plate 40, the storage box 30 can be stably stored in the box 10, avoiding changes in the magnetic field caused by the movement of the storage box 30, and improving the stability of the magnetic shielding.

[0037] In this embodiment, the shape of the positioning plate 40 is not specifically limited. For example, the positioning plate 40 can be rectangular, trapezoidal, or semi-circular.

[0038] In this embodiment, the number of positioning plates 40 is not specifically limited and can be one or more. To further improve the stability of magnetic shielding, multiple positioning plates 40 are provided on the periphery of the storage box 30, and the included angle between adjacent positioning plates 40 is 90°. This design can further ensure that the storage box 30 is stably placed in the box 10, reduce the relative movement between the storage boxes 30, and thus reduce the dynamic interference of the magnetic field.

[0039] To further improve the magnetic shielding effect and the ease of installation and disassembly of the storage box 30, a notch 42 is provided on the side of the positioning plate 40 near the inner wall of the box 10. The notch 42 design reduces the contact area between the positioning plate 40 and the inner wall of the box 10, thereby reducing the coupling path of the magnetic field and further improving the magnetic shielding effect. In addition, the notch 42 on the side of the positioning plate 40 near the inner wall of the box 10 facilitates the fit between the positioning plate 40 and the inner wall of the box 10, making it easier to install and disassemble the storage box 30.

[0040] In this embodiment, the notch 42 can be set at the upper and / or lower end of the side of the positioning plate 40 near the inner wall of the housing 10. The shape of the notch 42 is not specifically limited and can be a triangle, a rectangle or other suitable shape.

[0041] To further improve the magnetic shielding effect, in some embodiments of this example, the storage box 30 is provided with multiple partitions 50 to divide the storage box 30 into multiple independent storage spaces with openings at the top. By separating the storage spaces with partitions 50, it is ensured that each electronic component can be stored in a relatively independent environment, which can effectively reduce magnetic field coupling between electronic components and improve the magnetic shielding effect.

[0042] To further improve the magnetic shielding effect and the space utilization of the storage box 30, the storage box 30 is a cuboid with an open top. Multiple partitions 50 are evenly spaced along both the length and width of the cuboid to divide the storage box 30 into multiple independent storage spaces with open tops. This design not only improves space utilization but also ensures a uniform distribution of the magnetic field within the storage space, reducing localized magnetic field concentration and thus enhancing the overall magnetic shielding effect.

[0043] To further improve the magnetic shielding effect, in some embodiments of this example, a wave-absorbing material layer is provided between the inner wall of the box 10 and the outer wall of the storage box 30. By providing a wave-absorbing material layer between the inner wall of the box 10 and the outer wall of the storage box 30, the electromagnetic waves reflected internally can be absorbed, reducing electromagnetic interference and improving the magnetic shielding effect.

[0044] To further improve the magnetic shielding effect, in some embodiments of this example, the outer wall of the enclosure 10 is coated with a copper or aluminum coating. By coating the outer wall of the enclosure 10 with a copper or aluminum coating, the shielding effect against high-frequency electromagnetic fields can be enhanced.

[0045] To further improve the magnetic shielding effect, in some embodiments of this example, the housing 10, the lid 20, and the storage box 30 are all made of permalloy. The high magnetic permeability of permalloy can effectively guide and absorb magnetic fields, reduce the propagation of magnetic fields within the device, and thus improve the magnetic shielding effect.

[0046] To further improve the magnetic shielding effect, in some embodiments of this example, the thickness of the housing 10 and the cover 20 is not less than 1 mm. Sufficient thickness of the housing 10 and the cover 20 ensures that the device has sufficient structural strength and shielding effectiveness, reduces magnetic field penetration, thereby improving the magnetic shielding effect and preventing a decrease in shielding effectiveness due to excessively thin materials.

[0047] To facilitate handling and moving of the magnetic shielding device, handles 60 are provided on the two opposite sides of the housing 10 and / or the cover 20, which improves the ease of use of the magnetic shielding device.

[0048] To facilitate insertion and removal from the storage box 30, the positioning plate 40 is provided with a hand-held through hole 41, improving the ease of use of the magnetic shielding device. For example, as... Figure 3 As shown: When the storage box 30 is a cuboid with an open top and a positioning plate 40 is provided on each of its four peripheral walls, and the included angle between adjacent positioning plates 40 is 90°, a hand-held through hole 41 can be provided on the two positioning plates 40 arranged opposite each other to facilitate the handling and movement of the magnetic shielding device.

[0049] In this embodiment, the shape of the handheld through hole 41 is not specifically limited, and can be circular, square, elliptical, U-shaped or other suitable shapes.

[0050] In this specification, references to terms such as "some embodiments" or "examples" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0051] The above are merely preferred embodiments of this utility model and do not constitute any limitation on this utility model. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and contents disclosed in this utility model without departing from the scope of the technical solutions of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A magnetic shielding device, characterized in that, It includes a box body with an opening at the top and a box cover that is placed over the opening of the box body; The box contains multiple stacked storage boxes with open tops, the bottom of the upper storage box completely covering the opening of the lower storage box.

2. The magnetic shielding device according to claim 1, characterized in that, The storage box has a positioning plate on its peripheral wall that abuts against the inner wall of the box.

3. The magnetic shielding device according to claim 2, characterized in that, The storage box has multiple positioning plates on its periphery, and the included angle between adjacent positioning plates is 90°.

4. The magnetic shielding device according to claim 2 or 3, characterized in that, The positioning plate has a notch on the side near the inner wall of the box.

5. The magnetic shielding device according to claim 1, characterized in that, The storage box is equipped with multiple partitions to divide it into multiple independent storage spaces with openings at the top.

6. The magnetic shielding device according to claim 5, characterized in that, The storage box is a cuboid with an open top. Multiple partitions are evenly spaced along the length and width of the cuboid to divide the storage box into multiple independent storage spaces with open tops.

7. The magnetic shielding device according to claim 1, characterized in that, A wave-absorbing material layer is provided between the inner wall of the box and the outer wall of the storage box; And / or, the outer wall of the enclosure is coated with a copper or aluminum coating.

8. The magnetic shielding device according to claim 1, characterized in that, The box body, the box lid, and the storage box are all made of permalloy. And / or, the thickness of the box body and the box cover is not less than 1mm.

9. The magnetic shielding device according to claim 1, characterized in that, The connection between the box body and the box cover is equipped with a sealing structure.

10. The magnetic shielding device according to claim 2, characterized in that, The box body is provided with handles on two opposite sides and / or on the box lid; And / or, the positioning plate is provided with a handheld through hole.

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