Electromagnetic shielding structure and composite electromagnetic shielding small door

Abstract

The invention discloses an electromagnetic shielding structure and a composite electromagnetic shielding small door, which relates to the electromagnetic shielding technical field. The electromagnetic shielding structure includes a device base to be electromagnetically shielded, an upper cover installed on the base, an electromagnetic signal emission source fixed in the base, and a composite electromagnetic shielding small door. One side of the base has an electromagnetic signal emission source outlet, and the composite electromagnetic shielding small door is installed at the electromagnetic signal emission source outlet on the base; the composite electromagnetic shielding small door includes a multi-component silicone door, a metal wire mesh frame and a lining plate, the multi-component silicone door includes a silicone door body and silicone door flanges distributed around the edges of the silicone door body, the silicone door body adopts ordinary silicone, and the silicone door flange adopts conductive silicone; the metal wire mesh frame is located in the silicone door body and its edges are all embedded in the silicone door flange. The invention has excellent sealing performance, convenient opening and closing, reliable electromagnetic shielding, dustproof and waterproof, and simple installation.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic shielding, in particular to an electromagnetic shielding structure and a composite electromagnetic shielding small door. Background Art

[0002] With the rapid development of information technology, more and more applications are being made to electromagnetic shielding technology, which is an important component of electromagnetic compatibility technology and the main way to suppress electromagnetic leakage. To facilitate user operation, electronic information products must have external interfaces, so the door frame body (conductor) opening is inevitable, so it is imperative to perform electromagnetic shielding on such openings.

[0003] The size of the gap between the shielding door and the door frame is the key to the shielding performance. The existing methods to solve the gap size are: 1. Use shielding pads to squeeze and fill the gap; 2. Use a mechanism to move the shielding door to fill the gap. The shielding door needs to be repeatedly buckled and opened. The shielding pad in the above method 1 is easy to fall off; the mechanism of method 2 is complex, and the metal material is easy to deform, which poses a hidden danger to electromagnetic shielding. Summary of the invention

[0004] The technical task of the present invention is to address the above deficiencies and provide an electromagnetic shielding structure and a composite electromagnetic shielding door, which are easy to open and close, have reliable electromagnetic shielding, are dustproof and waterproof, and are easy to install.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] An electromagnetic shielding structure, comprising a device base body to be electromagnetically shielded, an upper cover mounted on the base body, an electromagnetic signal transmitting source fixed in the base body, and a composite electromagnetic shielding small door, wherein one side of the base body has an electromagnetic signal transmitting source outlet, and the composite electromagnetic shielding small door is mounted at the electromagnetic signal transmitting source outlet on the base body;

[0007] The composite electromagnetic shielding small door comprises a multi-component silicone door, a metal wire mesh frame and a lining plate. The multi-component silicone door comprises a silicone door body and silicone door flanges distributed around the edges of the silicone door body. The silicone door body is made of ordinary silicone, and the silicone door flange is made of conductive silicone. The metal wire mesh frame is located in the silicone door body and its edges are embedded in the silicone door flange. The lining plate is located in the silicone door body and is made of conductive material. The metal wire mesh frame and the lining plate are connected to each other to form a continuous conductor. The lining plate is connected to the upper cover through metal screws. The upper cover is made of conductive material. The lining plate and the upper cover form a continuous conductor.

[0008] The composite electromagnetic shielding door is interference fit with the installation opening on the substrate through the silicone door flange. The substrate is made of conductive material. When the composite electromagnetic shielding door is installed on the substrate, the composite electromagnetic shielding door, the substrate and the upper cover form a continuous conductor.

[0009] The main structure of the composite electromagnetic shielding small door is a silicone door, which is composed of two materials. The main material of the silicone door is ordinary silicone, and the flange around it is conductive silicone. There is a conductive path built by a conductive lining plate and a metal wire network inside the silicone door. The metal wire network is embedded in the conductive flange of the silicone door, which can not only enhance the strength performance of the flange, but also better supplement its electromagnetic shielding performance. After the composite electromagnetic shielding small door is assembled with the door frame body (conductor), the conductive flange of the silicone door is embedded in the installation groove corresponding to the door frame body (conductor) through the elastic deformation of the silicone itself. The two are interference fit, and the elastic deformation performance of the silicone is utilized. The two are fully in contact, achieving continuous conductive performance, and the conductive path built by the internal metal lining plate and the metal wire network ensures the realization of electromagnetic shielding.

[0010] Preferably, an electromagnetic shielding door installation opening is provided at the outlet of the electromagnetic signal transmitting source on the substrate, the electromagnetic shielding door installation opening has an embedded plane, and a groove is provided on the inner side surface, when the composite electromagnetic shielding door is installed on the substrate, the inner surface of the silicone door body is fitted with the embedded plane, and the silicone door flange is embedded in the groove through the elastic deformation of the silicone itself, and has an interference fit with the groove.

[0011] Preferably, the conductive silica gel is made by evenly distributing conductive particles in the silica gel to achieve conductive properties.

[0012] The main body of the silicone door is made of ordinary silicone, which does not have good electrical insulation performance and cannot achieve electromagnetic shielding. Therefore, the silicone door flange around it is made of conductive silicone, and conductive particles such as nickel-coated copper powder and silver powder are evenly distributed in the silicone to achieve conductive properties.

[0013] If multi-component silicone doors are made entirely of conductive silicone, the mechanism of conductive silicone is that conductive particles such as nickel-coated copper powder and silver powder are evenly distributed in the silicone. When distributed over a large area, this will lead to uneven distribution of conductive particles and there is a risk of local electromagnetic shielding failure. If only relying on electromagnetic shielding of conductive particles, there is a risk of frequency band limitation or poor performance.

[0014] Preferably, the composite electromagnetic shielding small door is injection molded.

[0015] Preferably, the lining includes a fixed lining and a supporting lining. The fixed lining is located at the upper part of the silicone door body, is horizontally arranged, and is used to connect the upper cover; the supporting lining is used to connect the wire mesh frame and the fixed lining and support the silicone door body.

[0016] Preferably, the metal wire grid frame is composed of two parallel and interconnected metal wire mesh plates, the corresponding silicone door flange is composed of two circles, and the edges of the two metal wire mesh plates are respectively embedded in the corresponding silicone door flanges.

[0017] Preferably, the lining plate is a metal lining plate; the base and the upper cover are both made of metal.

[0018] Preferably, a handle is provided on the outer surface of the silicone door body.

[0019] The present invention also claims protection for a composite electromagnetic shielding small door, comprising a multi-component silicone door, a metal wire mesh frame and a lining plate, the multi-component silicone door comprising a silicone door main body and silicone door flanges distributed around the edges of the silicone door main body, the silicone door main body is made of ordinary silicone, and the silicone door flange is made of conductive silicone; the metal wire mesh frame is located in the silicone door main body and its edges are embedded in the silicone door flange; the lining plate is located in the silicone door main body, and is made of conductive material, the metal wire mesh frame and the lining plate are interconnected to form a coherent conductor.

[0020] Preferably, the conductive silica gel is made by evenly distributing conductive particles such as nickel-coated copper powder and silver powder in the silica gel to achieve conductive properties.

[0021] Compared with the prior art, the electromagnetic shielding structure and composite electromagnetic shielding door of the present invention have the following beneficial effects:

[0022] The composite electromagnetic shielding small door described in the technical solution has both elastic deformation and conductive properties, can be made of a variety of materials through the existing injection molding process, has excellent sealing, is easy to open and close, has reliable electromagnetic shielding, is dustproof and waterproof, and is easy to install;

[0023] The main structure of the multi-component composite electromagnetic shielding door is a silicone door. The main material of the silicone door is ordinary silicone. The flange around it is conductive silicone. There is a conductive path built by a metal lining and a metal wire network inside the silicone door. The metal wire network is embedded in the conductive flange of the silicone door, which can not only enhance the strength of the flange, but also better supplement its electromagnetic shielding performance. After the multi-component composite electromagnetic shielding door is assembled with the door frame body (conductor), the conductive flange of the silicone door is embedded in the corresponding groove of the door frame body through the elastic deformation of the silicone itself. The two are interference fit, and the elastic deformation performance of the silicone is utilized. The two are fully in contact, achieving continuous conductive performance, and the conductive path built by the internal metal lining and the metal wire network ensures the realization of electromagnetic shielding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a front view of an electromagnetic shielding structure provided by an embodiment of the present invention;

[0025] Figure 2 is a side cross-sectional structural diagram of an electromagnetic shielding structure provided by an embodiment of the present invention;

[0026] Figure 3 is a top view of an electromagnetic shielding structure provided by an embodiment of the present invention;

[0027] Figure 4 is a front view of a composite electromagnetic shielding small door provided by an embodiment of the present invention;

[0028] Figure 5 is a side sectional structural diagram of a composite electromagnetic shielding small door provided by an embodiment of the present invention;

[0029] Figure 6 yes Figure 4 A cross-sectional view in the AA direction;

[0030] Figure 7 is a diagram of a silicone door flange provided by an embodiment of the present invention;

[0031] Figure 8 is a schematic diagram of the installation of a metal wire mesh frame provided by an embodiment of the present invention;

[0032] Fig. 9 is a front view of a metal wire mesh frame provided by an embodiment of the present invention;

[0033] Fig.10 is a side view of a metal wire mesh frame provided by an embodiment of the present invention;

[0034] Fig.11 is a top view of a metal wire mesh frame provided by an embodiment of the present invention;

[0035] Fig.12 It is a schematic diagram of the base structure provided by an embodiment of the present invention.

[0036] In the figure, 1. composite electromagnetic shielding small door, 2. base, 3. upper cover, 4. electromagnetic signal emission source, 1-1. multi-component silicone door, 1-2. fixed lining, 1-3. supporting lining, 1-4. wire mesh frame, 1-1-1. silicone door body, 1-1-2. silicone door flange, 2-1. groove, 2-2. embedded plane, 2-3. electromagnetic signal emission source outlet. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0038] An embodiment of the present invention provides an electromagnetic shielding structure, including a device base 2 to be electromagnetically shielded, an upper cover 3 installed on the base 2, an electromagnetic signal transmitting source 4 fixed in the base 2, and a composite electromagnetic shielding small door 1.

[0039] refer to Figure 1-2 and Fig.12 As shown, the base 2 is a box-shaped metal body with a bottom and an open top; the electromagnetic signal transmitting source 4 is installed at the bottom of the base 2, and its external interface is located at the opening position on one side of the base 2. The composite electromagnetic shielding small door 1 is installed at the opening position 2-3 of the electromagnetic signal transmitting source outlet on the base 2.

[0040] The composite electromagnetic shielding small door 1 comprises a multi-component silicone door 1-1, a metal wire mesh frame 1-4 and a metal lining plate. The multi-component silicone door 1-1 comprises a silicone door body 1-1-1 and silicone door flanges 1-1-2 distributed around the edges of the silicone door body 1-1-1. The silicone door body 1-1-1 is made of ordinary silicone, and the silicone door flanges 1-1-2 are made of conductive silicone. The silicone door body 1-1-1 itself does not have good electrical insulation performance and cannot achieve electromagnetic shielding, so the silicone door flanges 1-1-2 are made of conductive silicone, and conductive particles such as nickel-coated copper powder and silver powder are evenly distributed in the silicone. The conductive particles are evenly distributed in the silicone to achieve conductive performance. The metal wire mesh frame 1-4 is located in the silicone door body 1-1-1 and its edges are embedded in the silicone door flanges 1-1-2. The multi-component silicone door 1-1 and the metal wire mesh frame 1-4 form a continuous conductor. The metal lining includes a fixed lining 1-2 and a supporting lining 1-3. The fixed lining 1-2 is located at the upper part of the silicone door body 1-1-1, is horizontally arranged, and is used to connect the upper cover 3; the supporting lining 1-3 is used to connect the metal wire mesh frame 1-4 and the fixed lining 1-2, and support the silicone door body 1-1-1.

[0041] The fixed lining 1-2 is made of metal, embedded in the multi-component silicone door 1-1, and fixed to the upper cover 3 by screws, which can not only fix the composite electromagnetic shielding small door 1, but also make the fixed lining 1-2 and the upper cover 3 form a coherent conductor. The supporting lining 1-3 is made of metal, embedded in the multi-component silicone door 1-1, to strengthen the strength of the multi-component silicone door 1-1, and at the same time interconnected with the metal wire mesh frame 1-4 and the fixed lining 1-2 to form a coherent conductor. Therefore, the composite electromagnetic shielding small door 1 formed by injection molding has the good ability of silicone to resist compression deformation, and different compression ratios due to different hardness, which is suitable for cooperating with metal bodies to achieve sealing performance. It also forms a coherent conductor through the silicone door flange 1-1-2, the fixed lining 1-2, the supporting lining 1-3, and the metal wire mesh frame 1-4, and has electromagnetic shielding performance.

[0042] An electromagnetic shielding door installation opening is provided at the outlet of the electromagnetic signal transmitting source on the substrate 2, and an embedded plane 2-2 is provided in the electromagnetic shielding door installation opening, and a groove 2-1 is provided on the inner side surface; a multi-component silicone door 1-1 is installed in the opening on one side of the substrate 2, and its inner surface is fitted with the embedded plane 2-2; the silicone door flange 1-1-2 is just sunk into the groove 2-1, and the two are interference fit, and the compression performance of the silicone is utilized to ensure full contact between the two, thereby achieving continuous conductive performance.

[0043] Based on the above, a continuous conductor is formed among the composite electromagnetic shielding door 1, the base 2 and the upper cover 3, thereby achieving a shielding effect on the electromagnetic signal transmitting source 4 through the electromagnetic signal transmitting source outlet 2-3.

[0044] If the multi-component silicone door 1-1 is made entirely of conductive silicone, the mechanism of conductive silicone is that conductive particles such as nickel-coated copper powder and silver powder are evenly distributed in the silicone. When distributed over a large area, it will lead to uneven distribution of conductive particles, and there is a risk of local electromagnetic shielding failure; relying solely on electromagnetic shielding of conductive particles, there is a risk of frequency band limitation or poor performance.

[0045] In this embodiment, the metal wire mesh frame 1-4 is two parallel and interconnected metal wire mesh plates, the corresponding silicone door flange 1-1-2 is two circles, and the edges of the two metal wire mesh plates are respectively embedded in the corresponding silicone door flange 1-1-2.

[0046] The outer surface of the silicone door body 1-1-1 may be provided with a handle for easy disassembly.

[0047] The embodiment of the present invention also provides a composite electromagnetic shielding small door, including a multi-component silicone door 1-1, a metal wire mesh frame 1-4, a fixed lining plate 1-2, and a supporting lining plate 1-3. The multi-component silicone door 1-1 includes a silicone door body 1-1-1 and silicone door flanges 1-1-2 distributed around the edges of the silicone door body 1-1-1. The silicone door body 1-1-1 is made of ordinary silicone, and the silicone door flange 1-1-2 is made of conductive silicone. Conductive particles such as nickel-coated copper powder and silver powder are evenly distributed in the silicone. The conductive particles are evenly distributed in the silicone to achieve conductive properties. The metal wire mesh frame 1-4 is located in the silicone door body 1-1-1 and its edges are embedded in the silicone door flange 1-1-2; the multi-component silicone door 1-1 and the metal wire mesh frame 1-4 form a continuous conductor. The fixed lining plate 1-2 is located at the upper part of the silicone door body 1-1-1, is arranged horizontally, and is used to connect the upper cover 3; the supporting lining plate 1-3 is used to connect the metal wire mesh frame 1-4 and the fixed lining plate 1-2, and to support the silicone door body 1-1-1.

[0048] The fixed lining 1-2 is made of metal, embedded in the multi-component silicone door 1-1, and fixed to the upper cover 3 by screws, which can not only fix the composite electromagnetic shielding small door 1, but also make the fixed lining 1-2 and the upper cover 3 form a coherent conductor. The supporting lining 1-3 is made of metal, embedded in the multi-component silicone door 1-1, to strengthen the strength of the multi-component silicone door 1-1, and at the same time interconnected with the metal wire mesh frame 1-4 and the fixed lining 1-2 to form a coherent conductor. Therefore, the composite electromagnetic shielding small door 1 formed by injection molding has the good ability of silicone to resist compression deformation, and different compression ratios due to different hardness, which is suitable for cooperating with metal bodies to achieve sealing performance. It also forms a coherent conductor through the silicone door flange 1-1-2, the fixed lining 1-2, the supporting lining 1-3, and the metal wire mesh frame 1-4, and has electromagnetic shielding performance.

[0049] The application of the composite electromagnetic shielding small door can refer to the specific application of the composite electromagnetic shielding small door 1 in the electromagnetic shielding structure of the above embodiment, that is:

[0050] The base 2 is a box-shaped metal body with a bottom and an open top; the electromagnetic signal transmitting source 4 is installed at the bottom of the base 2, and its external interface is located at the opening position on one side of the base 2. The composite electromagnetic shielding small door 1 is installed at the opening position 2-3 of the electromagnetic signal transmitting source outlet on the base 2.

[0051] An electromagnetic shielding door installation opening is provided at the outlet of the electromagnetic signal transmitting source on the substrate 2, and an embedded plane 2-2 is provided in the electromagnetic shielding door installation opening, and a groove 2-1 is provided on the inner side surface; a multi-component silicone door 1-1 is installed in the opening on one side of the substrate 2, and its inner surface is fitted with the embedded plane 2-2; the silicone door flange 1-1-2 is just sunk into the groove 2-1, and the two are interference fit, and the compression performance of the silicone is utilized to ensure full contact between the two, thereby achieving continuous conductive performance.

[0052] Through the above specific implementations, those skilled in the art can easily implement the present invention. However, it should be understood that the present invention is not limited to the above specific implementations. On the basis of the disclosed implementations, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

[0053] Except for the technical features described in the specification, all other technical features are known technologies to those skilled in the art.

Claims

1. An electromagnetic shielding structure, characterized in that: It includes a substrate to be electromagnetically shielded, an upper cover installed on the substrate, an electromagnetic signal emission source fixed in the substrate, and a composite electromagnetic shielding small door, one side of the substrate has an electromagnetic signal emission source outlet, and the composite electromagnetic shielding small door is installed at the electromagnetic signal emission source outlet on the substrate; The composite electromagnetic shielding small door comprises a multi-component silicone door, a metal wire mesh frame and a lining plate. The multi-component silicone door comprises a silicone door body and silicone door flanges distributed around the edges of the silicone door body. The silicone door body is made of ordinary silicone, and the silicone door flange is made of conductive silicone. The metal wire mesh frame is located in the silicone door body and its edges are embedded in the silicone door flange. The lining plate is located in the silicone door body and is made of conductive material. The metal wire mesh frame and the lining plate are connected to each other to form a continuous conductor. The lining plate is connected to the upper cover through metal screws. The upper cover is made of conductive material. The lining plate and the upper cover form a continuous conductor. The composite electromagnetic shielding door is interference-fitted with the electromagnetic shielding door installation opening on the substrate through the silicone door flange, the substrate is made of conductive material, and when the composite electromagnetic shielding door is installed on the substrate, the composite electromagnetic shielding door, the substrate and the upper cover form a continuous conductor; an electromagnetic shielding door installation opening is provided at the outlet of the electromagnetic signal emission source on the substrate, the electromagnetic shielding door installation opening has an embedded plane, and a groove is provided on the inner side surface, when the composite electromagnetic shielding door is installed on the substrate, the inner surface of the silicone door body is fitted with the embedded plane, and the silicone door flange is embedded in the groove through the elastic deformation of the silicone itself, and has an interference fit with the groove; The lining plate includes a fixed lining plate and a supporting lining plate. The fixed lining plate is located at the upper part of the silicone door body, is horizontally arranged, and is used to connect the upper cover; the supporting lining plate is used to connect the metal wire mesh frame and the fixed lining plate, and support the silicone door body; the metal wire mesh frame is two parallel and interconnected metal wire mesh plates, and the corresponding silicone door flange is two circles, and the edges of the two metal wire mesh plates are respectively embedded in the corresponding silicone door flanges.

2. The electromagnetic shielding structure according to claim 1, characterized in that: The conductive silica gel is made by evenly distributing conductive particles in the silica gel to achieve conductive properties.

3. The electromagnetic shielding structure according to claim 1, characterized in that: The composite electromagnetic shielding small door is injection molded.

4. The electromagnetic shielding structure according to claim 1, characterized in that: The lining plate is a metal lining plate; the base and the upper cover are both made of metal.

5. The electromagnetic shielding structure according to claim 1, characterized in that: A handle is arranged on the outer surface of the silica gel door body.

6. A composite electromagnetic shielding small door, characterized in that: It comprises a multi-component silicone door, a metal wire mesh frame and a lining plate. The multi-component silicone door comprises a silicone door body and silicone door flanges distributed around the edges of the silicone door body. The silicone door body is made of ordinary silicone, and the silicone door flange is made of conductive silicone. The metal wire mesh frame is located in the silicone door body and its edges are embedded in the silicone door flange. The lining plate is located in the silicone door body and is made of conductive material. The metal wire mesh frame and the lining plate are connected to each other to form a continuous conductor. The lining plate includes a fixed lining plate and a supporting lining plate. The multi-component silicone door and the metal wire mesh frame form a continuous conductor. The fixed lining plate is located at the upper part of the silicone door body, is horizontally arranged, and is used to connect the upper cover. The supporting lining plate is used to connect the metal wire mesh frame and the fixed lining plate, and to support the silicone door body. The fixed lining is made of metal, embedded in the multi-component silicone door, and fixed to the upper cover by screws; the supporting lining is made of metal, embedded in the multi-component silicone door, to enhance the strength of the multi-component silicone door, and at the same time connected with the metal wire mesh frame and the fixed lining to form a coherent conductor; The application of this composite electromagnetic shielding door is: The substrate is a box-shaped metal body with a bottom and an open top; the electromagnetic signal transmitting source is installed at the bottom of the substrate, and its external interface is located at an opening position on one side of the substrate; the composite electromagnetic shielding small door is installed at the opening position at the outlet of the electromagnetic signal transmitting source on the substrate; an electromagnetic shielding small door installation opening is opened at the outlet of the electromagnetic signal transmitting source on the substrate, and the electromagnetic shielding small door installation opening has an embedded plane and a groove on the inner side; the multi-component silicone door is installed in the opening on one side of the substrate, and its inner surface fits with the embedded plane; the silicone door flange is just sunk into the groove, and the two are interference fit, and the compression performance of the silicone is utilized to ensure full contact between the two, thereby achieving continuous conductive performance.

7. The composite electromagnetic shielding small door according to claim 6, characterized in that: The conductive silica gel is made by evenly distributing conductive particles in the silica gel to achieve conductive properties.

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