Electromagnetic shield case and medical electrical equipment

Abstract

The application belongs to the technical field of medical apparatus and instruments, and discloses an electromagnetic shielding shell and a medical electrical equipment. The electromagnetic shielding shell is used for preventing an electrical module from radiating excessive electromagnetic radiation outward or preventing external high-frequency electromagnetic waves from interfering with the operation of the electrical module. The electromagnetic shielding shell comprises a shell. The side surface of the shell is provided with a shielding layer made of shielding material. The side surface of the shell is provided with a plurality of grooves. The plurality of grooves extend in different directions and are distributed along the circumference of the shell. The plurality of grooves are sequentially intersected, and the grooves are filled with shielding material, so that the plurality of grooves form a shielding net for shielding electromagnetic waves. When the shell is processed, the thickness of the shielding material is effectively increased due to the plurality of grooves, so that the shell can form a shielding layer and a shielding net with appropriate thickness of the shielding material on the side surface of the shell, so as to effectively prevent the electrical module in the shell from radiating excessive electromagnetic radiation outward or prevent external high-frequency electromagnetic waves from interfering with the operation of the electrical module.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more particularly to electromagnetic shielding shells and medical electrical equipment. Background Technology

[0002] Medical electrical equipment must comply with EMC (Electromagnetic Compatibility) design standards during its design and manufacturing. This means that it must prevent its own high-frequency radiation sources from generating excessive radiation, and it must also prevent external electromagnetic waves from interfering with its internal circuits. Therefore, its casing generally needs to have electromagnetic shielding capabilities.

[0003] In the prior art, the outer shell can be made of metal materials, which can provide good electromagnetic shielding. However, some electrical equipment is not suitable for making the outer shell of metal materials. It can only use plastic shells or other non-metallic shells. The shielding material is directly sprayed on the inner surface of the shell to make the shell have electromagnetic shielding function.

[0004] However, since the shielding material is directly attached to the surface of the outer shell, its thickness cannot be increased beyond 50 micrometers due to the limitations of its adhesion. This results in a low upper limit for the thickness of the shielding material, leading to poor shielding performance. Summary of the Invention

[0005] The purpose of this invention is to provide an electromagnetic shielding shell and medical electrical equipment, which solves the problem that the upper limit of the thickness of the shielding material in the prior art is low, resulting in poor shielding effect of the shell.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides an electromagnetic shielding shell for preventing electrical modules from radiating excessive electromagnetic radiation or preventing external high-frequency electromagnetic interference with the operation of the electrical modules. The electromagnetic shielding shell comprises:

[0008] The housing has a shielding layer made of shielding material on its side and multiple grooves are formed on the side of the housing. The multiple grooves extend in different directions and are distributed around the circumference of the housing. The multiple grooves intersect in sequence and are filled with shielding material so that the multiple grooves form a shielding mesh for electromagnetic shielding.

[0009] Optionally, the shielding material is applied to the groove using a spraying or brushing process.

[0010] Optionally, the depth of the groove is greater than 50 μm and less than 1000 μm.

[0011] Optionally, the width of the groove is between 50 μm and 500 μm.

[0012] Optionally, the shielding mesh has multiple grids, the size of which is less than one-hundredth of the wavelength of the electromagnetic wave.

[0013] Optionally, the shielding material protrudes from the groove.

[0014] Optionally, the thickness of the shielding material protruding from the groove is less than or equal to 50 μm.

[0015] Optionally, the shielding mesh has a brick-like pattern.

[0016] Optionally, the shielding mesh has a fish-scale pattern.

[0017] In a second aspect, the present invention also provides a medical electrical device comprising:

[0018] Electromagnetic shielding shell as described in any of the first aspects;

[0019] The electrical module is housed within the electromagnetic shielding shell.

[0020] The beneficial effects of this invention are:

[0021] Firstly, by setting a shielding layer of shielding material on the side of the housing and simultaneously creating multiple grooves filled with shielding material, the multiple grooves form a shielding mesh. This increases the upper limit of the shielding material thickness, particularly at the grooves, where the thickness can be significantly increased. Furthermore, the shielding mesh formed by the multiple grooves creates a "roughening" effect on the shielding material, increasing the roughness of the housing's side surface and improving the adhesion of the shielding material, thus further increasing the upper limit of the shielding material thickness. Therefore, during the manufacturing process, the thickness of the shielding material is effectively increased by the multiple grooves, allowing for the formation of a shielding material of appropriate thickness on the side of the housing to meet electromagnetic shielding requirements, thus ensuring that the electromagnetic shielding effect of the housing meets the usage requirements. This effectively prevents the electrical modules inside the housing from radiating excessive electromagnetic radiation or prevents external high-frequency electromagnetic interference to the operation of the electrical modules.

[0022] Secondly, when in use, the medical electrical equipment can effectively prevent the electrical module from radiating excessive electromagnetic radiation or prevent external high-frequency electromagnetic interference to the operation of the electrical module through the electromagnetic shielding shell, thus effectively ensuring that the medical electrical equipment can operate normally and stably. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the shielding mesh on the side of the electromagnetic shielding shell in an embodiment of the present invention, which has a brick-like pattern.

[0024] Figure 2 This is a schematic diagram of the fish-scale pattern of the shielding mesh on the side of the electromagnetic shielding shell in an embodiment of the present invention.

[0025] In the picture:

[0026] 1. Shell; 2. Groove. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0028] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0031] This invention provides an electromagnetic shielding shell and medical electrical equipment.

[0032] Reference Figure 1 and Figure 2This electromagnetic shielding shell is used to prevent the electrical module from radiating excessive electromagnetic radiation or to prevent external high-frequency electromagnetic interference to the operation of the electrical module. The electromagnetic shielding shell includes a shell 1. A shielding layer made of shielding material is provided on the side of the shell 1, and multiple grooves 2 are formed on the side of the shell 1. The multiple grooves 2 extend in different directions and are distributed around the circumference of the shell 1. The multiple grooves 2 intersect sequentially and are filled with shielding material so that the multiple grooves 2 form a shielding mesh for electromagnetic shielding.

[0033] Specifically, the housing 1 is made of non-metallic materials such as plastic. Multiple grooves 2 are machined on the side surface of the housing 1. The side surface can be either the inner or outer surface of the housing 1. For the sake of overall appearance and color requirements on the outer surface of the housing 1, this embodiment creates grooves 2 on the inner surface of the housing 1 to avoid conflicts between the shielding material and other paint finishes on the outer surface of the housing 1. The multiple grooves 2 extend in different directions, such as horizontally, vertically, or with a certain arc. They can be straight or curved. The grooves 2 cover the entire side surface of the housing 1, and the multiple grooves 2 are connected sequentially and interwoven to form a mesh structure. Shielding material is placed inside the grooves 2. The shielding material can be metallic paint or other suitable materials.

[0034] By setting a shielding layer of shielding material on the side of the housing 1, and simultaneously creating multiple grooves 2, which are filled with shielding material, the multiple grooves 2 form a shielding mesh. This increases the upper limit of the shielding material thickness, especially at the grooves 2, where the thickness can be significantly increased. Furthermore, the shielding mesh formed by the multiple grooves 2 has a "roughening" effect on the shielding material, increasing the roughness of the side of the housing 1 and improving the adhesion of the shielding material to the side of the housing, thus further increasing the upper limit of the shielding material thickness. Therefore, during the manufacturing of the housing 1, the thickness of the shielding material is effectively increased by creating multiple grooves 2. This allows for the formation of a shielding material of appropriate thickness on the side of the housing 1 to form a shielding layer and a shielding mesh according to electromagnetic shielding requirements. This ensures that the electromagnetic shielding effect of the housing 1 meets the usage requirements, effectively preventing the electrical modules inside the housing 1 from radiating excessive electromagnetic radiation or preventing external high-frequency electromagnetic interference to the operation of the electrical modules.

[0035] Optionally, the shielding material is applied to the groove 2 using a spraying or brushing process.

[0036] When applying spraying or brushing processes, more shielding material can be added to the groove 2 to ensure that the shielding material can fill the entire groove 2. The thickness after filling the groove 2 can be detected by a film thickness detector to ensure that the overall thickness meets the requirements.

[0037] Optionally, the depth of the groove 2 is greater than 50 μm and less than 1000 μm.

[0038] Specifically, the depth of the groove 2 depends on the thickness of the shell 1 and the shielding requirements that need to be met. While ensuring that the overall strength of the shell 1 meets the requirements, the depth of the groove 2 can be processed to several hundred μm. The depths of multiple grooves 2 can be the same or different. The specific design can be based on the electromagnetic distribution in the actual application environment. This invention does not limit this.

[0039] Optionally, the width of the groove 2 is between 50 μm and 500 μm.

[0040] Specifically, the width of groove 2 directly affects the flow resistance of the shielding material during the filling process. If the width is too small, the resistance will be too high, and the shielding material may not be able to flow smoothly into the groove 2. Conversely, if the width is too large, the resistance will be too low, resulting in poor adhesion between the shielding material and the groove 2, and the thickness of the shielding material at the groove 2 cannot be maintained. The viscosity of the shielding material itself also needs to be considered. Therefore, for grooves 2 with shallow depths, the width can be between 50 μm and 200 μm. For grooves 2 with depths of several hundred micrometers, the width can be designed to be larger to ensure that the shielding material can smoothly fill the entire groove 2. The specific width value of groove 2 can be designed according to the actual depth and the viscosity of the shielding material; this invention does not impose any limitations on this.

[0041] Optionally, the shielding mesh has multiple grids, the size of which is less than one-hundredth of the wavelength of the electromagnetic wave.

[0042] Specifically, multiple grooves 2 intersect sequentially to form a mesh. According to Faraday cage theory, the size of the mesh affects the wavelength of the shielded electromagnetic waves. When the mesh size is smaller than a certain value, it can achieve electromagnetic shielding for electromagnetic waves above a certain high frequency band. The mesh size can be less than one-hundredth of the electromagnetic wave wavelength. It should be understood that in other embodiments, the mesh size can also be smaller than other values, which will not be elaborated upon in this invention. When only considering the electromagnetic shielding effect, the mesh size can be carefully designed during the formation of the shielding mesh to further reduce the overall manufacturing difficulty.

[0043] Optionally, the shielding material protrudes from the groove 2.

[0044] Specifically, the thickness of the shielding material protruding from the groove 2 is less than or equal to 50 μm, so that a "metal mesh" can also be formed on the surface of the shielding layer. On the one hand, this ensures that the shielding material at the location where the groove 2 is opened can reach more than 50 μm, and on the other hand, this "metal mesh" can be used to achieve a more effective electromagnetic shielding effect.

[0045] Optionally, in one embodiment, the shielding mesh has a brickwork pattern. In another embodiment, the shielding mesh has a fish scale pattern. Since the opening of multiple grooves 2 inevitably affects the strength of the outer shell, by setting the shielding mesh to a brickwork or fish scale pattern, the overall stress of the shell 1 is dispersed, ensuring that the overall strength meets the requirements. It should be understood that the shielding mesh can also be arranged with other patterns, specifically designed according to the actual processing difficulty and strength requirements.

[0046] The medical electrical device includes an electrical module and the aforementioned electromagnetic shielding housing. The electrical module is housed within the electromagnetic shielding housing.

[0047] When in use, the electromagnetic shielding shell of this medical electrical equipment can effectively prevent the electrical module from radiating excessive electromagnetic radiation or prevent external high-frequency electromagnetic interference to the operation of the electrical module, thus ensuring that the medical electrical equipment can operate normally and stably.

[0048] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An electromagnetic shielding shell, characterized in that, The electromagnetic shielding shell, used to prevent excessive electromagnetic radiation emitted by the electrical module or to prevent external high-frequency electromagnetic interference with the operation of the electrical module, comprises: The shell (1) has a shielding layer made of shielding material on its side and a plurality of grooves (2) are provided on the side of the shell (1). The plurality of grooves (2) extend in different directions and are distributed around the circumference of the shell (1). The plurality of grooves (2) intersect in sequence and are filled with shielding material so that the plurality of grooves (2) form a shielding mesh for electromagnetic shielding.

2. The electromagnetic shielding shell according to claim 1, characterized in that, The shielding material is applied to the groove (2) by spraying or brushing.

3. The electromagnetic shielding shell according to claim 1, characterized in that, The groove (2) has a depth greater than 50 μm and less than 1000 μm.

4. The electromagnetic shielding shell according to claim 1, characterized in that, The width of the groove (2) is between 50 μm and 500 μm.

5. The electromagnetic shielding shell according to claim 1, characterized in that, The shielding mesh has multiple grids, the size of which is less than one-hundredth of the wavelength of the electromagnetic wave.

6. The electromagnetic shielding shell according to claim 1, characterized in that, The shielding material protrudes from the groove (2).

7. The electromagnetic shielding shell according to claim 6, characterized in that, The thickness of the shielding material protruding from the groove (2) is less than or equal to 50 μm.

8. The electromagnetic shielding shell according to any one of claims 1 to 7, characterized in that, The shielding mesh has a brick-like pattern.

9. The electromagnetic shielding shell according to any one of claims 1 to 7, characterized in that, The shielding mesh has a fish-scale pattern.

10. Medical electrical equipment, characterized in that, include: Electromagnetic shielding shell as described in any one of claims 1 to 9; The electrical module is housed within the electromagnetic shielding shell.

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