CN215872551U - Electromagnetic shielding sealing strip, electromagnetic shielding sealing ring and electronic equipment - Google Patents
Electromagnetic shielding sealing strip, electromagnetic shielding sealing ring and electronic equipment Download PDFInfo
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- CN215872551U CN215872551U CN202120461715.2U CN202120461715U CN215872551U CN 215872551 U CN215872551 U CN 215872551U CN 202120461715 U CN202120461715 U CN 202120461715U CN 215872551 U CN215872551 U CN 215872551U
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Abstract
The application provides an electromagnetic shielding sealing strip, an electromagnetic shielding sealing ring and electronic equipment, and relates to the technical field of electromagnetic shielding. The electromagnetic shielding sealing strip comprises a sealing strip body and a conducting layer wrapped outside the sealing strip body. The sealing strip body is provided with preset elastic deformation, the sealing strip body is internally provided with a cavity which is deformed in an extending mode, and the cavity is not communicated with the outside. Because the sealing strip body has higher elastic deformation and the inside has along the cavity of axial extension to make the electromagnetic shield sealing strip when receiving external force, have great compression deflection, can seal large-scale electronic equipment. In addition, the electromagnetic shielding sealing strip of this application can also shield the electromagnetic wave because of being provided with the conducting layer to make electronic equipment not disturbed by external environment, the electromagnetic wave that its self radiated also can not disturb external equipment.
Description
Technical Field
The application relates to the technical field of electromagnetic shielding, in particular to an electromagnetic shielding sealing strip, an electromagnetic shielding sealing ring and electronic equipment.
Background
With the continuous development and wide application of the electronic industry, electromagnetic wave radiation is the fourth pollution after light pollution, noise pollution and air pollution, and high-frequency electromagnetic waves emitted by electronic equipment not only can cause the equipment not to normally operate, but also can influence human health, so that the electromagnetic shielding is very important, and the selection of electromagnetic shielding materials is also very important. Conductive rubber has good conductivity, sealing property and stability, and is therefore often used for sealing and shielding electronic devices.
However, large-sized electronic equipment is difficult to machine and heat treat, the error between the actual size and the design size can reach several centimeters, and when the conductive rubber is used for electromagnetic shielding and sealing, the situation of poor sealing can occur, and the sealing performance of the large-sized electronic equipment is difficult to ensure.
SUMMERY OF THE UTILITY MODEL
The application provides an electromagnetic shielding sealing strip, an electromagnetic shielding sealing ring and electronic equipment to solve the problem that sealing is not tight when the existing conductive rubber seals large-scale electronic equipment.
In order to solve the above problem, in a first aspect, the present application discloses an electromagnetic shielding sealing tape comprising:
the sealing strip comprises a sealing strip body, a sealing strip body and a sealing strip body, wherein the sealing strip body is provided with preset elastic deformation and is internally provided with a cavity which is extended and deformed, and the cavity is not communicated with the outside;
and the conducting layer is wrapped outside the sealing strip body.
In an alternative embodiment, the weatherstrip body comprises a foamed weatherstrip.
In an alternative embodiment, the cavity comprises an upper cavity and a lower cavity, the upper cavity having an area greater than the area of the lower cavity.
In an alternative embodiment, the upper cavity and the lower cavity are both symmetrical along the central axis of the sealing strip body.
In an alternative embodiment, the conductive layer has a predetermined resistance value, and the conductive layer includes a conductive cloth layer.
In an optional embodiment, the sealing strip body further includes a fixing portion for fixing the sealing strip body to the member to be installed.
An electromagnetic shielding sealing ring is formed by bonding a plurality of electromagnetic shielding sealing strips of the first aspect.
In an alternative embodiment the electromagnetically shielded sealing ring is adapted to the sealing track on the mounting member.
An electronic device comprising a shield portion, the shield portion comprising the electromagnetic shield sealing ring of the second aspect.
Compared with the prior art, the method has the following advantages:
an electromagnetic shielding sealing strip comprises a sealing strip body and a conducting layer wrapped outside the sealing strip body. The sealing strip body is provided with preset elastic deformation, the sealing strip body is internally provided with a cavity which is deformed in an extending mode, and the cavity is not communicated with the outside. Because the sealing strip body has higher elastic deformation and the inside has the cavity that extends the deformation to make the electromagnetic shield sealing strip when receiving external force, have great compression deflection, can seal large-scale electronic equipment. In addition, the electromagnetic shielding sealing strip of this application can also shield the electromagnetic wave because of being provided with the conducting layer to make electronic equipment not disturbed by external environment, the electromagnetic wave that its self radiated also can not disturb external equipment.
Drawings
Fig. 1 is a schematic structural view of an electromagnetic shielding sealing tape of the present application;
fig. 2 is a cross-sectional view of the electromagnetic shielding sealing tape of the present application;
fig. 3 is a plan view of the electromagnetic shield seal ring of the present application.
Description of reference numerals: 1. an electromagnetic shielding sealing strip; 11. a sealing strip body; 12. a conductive layer; 110. connecting ribs; 111. a fixed part.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
The conductive rubber is prepared by uniformly distributing conductive particles such as silver-plated glass, silver-plated aluminum, silver and the like in silicon rubber, and contacting the conductive particles through pressure to achieve good conductive performance, so that the conductive rubber has certain electromagnetic shielding performance and sealing performance. Generally, the conductive rubber is considered to be an incompressible elastomer, i.e., the volume of the conductive rubber is basically kept unchanged in a stressed compression deformation state, so that the compression deformation amount of the conductive rubber is relatively limited, for example, the compression deformation amount of the rectangular conductive rubber is 5-10%, the compression deformation amount of the O-type conductive rubber is 20-50%, the compression deformation amount of the D-type conductive rubber is 15-50%, and the compression deformation amount of the P-type conductive rubber is 25-50%. Therefore, the conductive rubber has a small compression deformation amount, so that the effect is poor when the conductive rubber is used for sealing large-scale electronic equipment. In addition, the conductive rubber is expensive, and therefore, the cost for sealing large-sized electronic equipment is high. Therefore, it is necessary to provide an electromagnetic shielding gasket with low cost and relatively large compression deformation for sealing and shielding large electronic devices.
Referring to fig. 1 and 2, an electromagnetic shielding sealing tape 1 includes a sealing tape body 11 and a conductive layer 12 wrapped outside the sealing tape body 11. The sealing strip body 11 has a preset elastic deformation, the elastic deformation is 20% -60%, the sealing strip body 11 is internally provided with an extensible cavity, the cavity is not communicated with the outside, the number of the cavities can be one, two or even multiple, and the specific number is determined according to the service environment of the electromagnetic shielding sealing strip 1. Accordingly, the electromagnetic shielding sealing tape 1 also has various cross-sectional shapes such as a rectangular shape, a herringbone shape, a field shape or other irregular shapes. Because the sealing strip body 11 has high elastic deformation and an extensible and deformable cavity inside, the electromagnetic shielding sealing strip 1 has high compression deformation amount when being subjected to external force, the compression deformation amount is 40% -80%, and large-scale electronic equipment can be sealed. In addition, the electromagnetic shielding sealing strip 1 of the present application can also shield electromagnetic waves due to the conductive layer 12, so that the electronic device is not interfered by the external environment, and the electromagnetic waves radiated by itself do not interfere with the external device.
In an alternative embodiment, a foamed sealing tape with a cavity structure can be directly used as the sealing tape body 11, and the conductive layer 12 is wrapped outside the foamed sealing tape to form the electromagnetic shielding sealing tape 1. The foaming sealing strip is made by adopting an extrusion process, and one, two or even a plurality of cavities can be formed in the extrusion process. Because the foamed sealing strip is internally provided with the cavity and has high elastic deformation, the electromagnetic shielding sealing strip 1 made of the foamed sealing strip has good compression deformation, and can be applied to sealing of large-scale electronic equipment.
In an optional embodiment, the number of the cavities is two, the upper cavity and the lower cavity are arranged up and down, a connecting rib 110 is arranged between the upper cavity and the lower cavity, and the material of the connecting rib 110 may be the same as that of the sealing strip body 11, or may be different from that of the sealing strip body 11, as long as the compression deformation of the electromagnetic shielding sealing strip 1 is not reduced. The connecting rib 110 may be a straight line or a curved line, and the connecting rib 110 may be smooth or may be in a wave-tooth shape or a zigzag shape, which is not described in detail in this application. The connecting rib 110 provides a certain supporting force for the electromagnetic shielding sealing strip 1, so that the situation that the electromagnetic shielding sealing strip 1 cannot be restored after the external force is removed is avoided, and the service life of the electromagnetic shielding sealing strip 1 is prolonged.
Preferably, the area of the upper cavity is larger than that of the lower cavity, the whole structure is stable, and deformation is uniform after stress. When the electromagnetic shielding sealing strip 1 receives external force, the upper cavity and the lower cavity both can generate compression deformation, however, because the area of the upper cavity is larger than that of the lower cavity, the electromagnetic shielding sealing strip 1 has good compression permanent deformation while ensuring a certain compression deformation. The compression set is one of the most important characteristics affecting the sealing performance, the reuse rate and the service life of the electromagnetic shielding sealing tape 1. It reflects the ability of the electromagnetic shielding sealing strip 1 to recover to the original shape after compression deformation at a certain time and a certain temperature. The smaller the compression permanent deformation is, the better the elasticity of the electromagnetic shielding sealing strip 1 is, the better the sealing performance and the shielding performance are, and the longer the service life is. More preferably, the ratio of the area of the upper cavity to the area of the lower cavity is 1-3: 1.
Preferably, the upper cavity and the lower cavity are symmetrical along the central axis of the sealing strip body 11, the electromagnetic shielding sealing strip 1 is stressed uniformly, the phenomenon of stress concentration cannot occur, and the stability is good.
In an alternative embodiment, the conductive layer 12 has a predetermined resistance, and the resistance of the conductive layer 12 is usually less than 0.1 Ω/Sq. Under the resistance, the electromagnetic shielding sealing strip 1 has the shielding performance of more than 80dB of electric field and more than 60dB of magnetic field, and electromagnetic waves radiated by electronic equipment cannot interfere with the outside and cannot be interfered by the outside electromagnetic waves. Preferably, the conductive layer 12 is a conductive fabric, and the conductive fabric is a conductive fiber fabric formed by pre-treating a fiber fabric as a base material and then applying an electroplated metal coating to make the fiber fabric have a metallic characteristic. When external electromagnetic waves are radiated to the conductive cloth (the external electromagnetic waves can be radiated by electronic equipment, and other equipment can also be radiated to the electronic equipment), free electrons are released by the metal coating, the free electrons form electromagnetic waves with the direction opposite to that of the external electromagnetic waves in the moving process, the internal electromagnetic waves and the external electromagnetic waves are mutually counteracted, and the effect of weakening electromagnetic interference waves is achieved. In order to make the conductive layer 12 have excellent shielding performance and also have dustproof and rainproof functions, a wear-resistant and non-hydrophilic conductive cloth with high shielding performance is usually selected as the conductive layer 12. The conductive cloth may be commercially available or may be self-made, for example, a polyester fiber conductive cloth with a copper-nickel plating layer is prepared by a chemical deposition method-electroplating method, and the material and structure of the conductive layer 12 in the present application are not limited as long as the resistance value satisfies the shielding requirement.
In an alternative embodiment, the weather strip body 11 further includes a fixing portion 111, and the fixing portion 111 fixes the electromagnetic shielding weather strip 1 to the mounting member. In the installation process of the electromagnetic shielding sealing strip 1, the electromagnetic shielding sealing strip 1 is in line contact with the installation part, so that the electromagnetic shielding sealing strip 1 is easy to fall off, and faults are caused. After the fixing portion 111 is provided, the fixing portion 111 fixes the electromagnetic shield sealing tape 1 to the mounting member, and prevents the electromagnetic shield sealing tape 1 from falling off from the mounting member. The exemplary fixing portion 111 may be fixing bands disposed on two sides of the electromagnetic shielding sealing strip 1, and the fixing bands are made of the same material as the electromagnetic shielding sealing strip 1, and thus have a certain elastic deformation.
An electromagnetic shielding sealing ring is formed by bonding a plurality of electromagnetic shielding sealing strips 1. The shape of the electromagnetic shielding sealing ring is matched with the sealing track on the mounting part, such as a ring shape, a polygon shape and other irregular shapes.
The electromagnetic shielding sealing ring is large in deformation amount and can be applied to sealing shielding of large-scale electronic equipment. If the height of a certain electromagnetic shielding sealing ring is 50mm, the deformation range is 20-40 mm, and the deformation range is larger.
Referring to fig. 3, an electromagnetic shielding sealing ring installed on a well cover seat of a shielded well is shown, the electromagnetic shielding sealing ring is formed by bonding a plurality of electromagnetic shielding sealing strips 1 in fig. 1, the electromagnetic shielding sealing ring is octagonal, the cross section of each electromagnetic shielding sealing strip 1 is in a shape of a Chinese character ri, the electromagnetic shielding sealing strips 1 are irregular in shape, each electromagnetic shielding sealing strip 1 is provided with an arc-shaped part and a straight line part, and the shape of each electromagnetic shielding sealing strip 1 is matched with the well cover seat and the well cover of the shielded well, so that good sealing can be realized. When the electromagnetic shielding sealing ring is compressed by an external force, the section in the shape of the Chinese character 'ri' can deform, so that the width of the section of the electromagnetic shielding sealing ring is widened, and the height of the section is lowered, thereby sealing the well cover seat and the well cover.
The electromagnetic shielding sealing ring (the electromagnetic shielding sealing strip 1) has wide and thick section shape, large turning radius and serious deformation during over-bending, so that the complete electromagnetic shielding sealing ring cannot be directly conveyed to an installation site. Therefore, before transportation, part of the electromagnetic shielding sealing strip 1 is bonded together, and an interface is reserved at the straight line section to form a semi-finished product of the electromagnetic shielding sealing ring; after the semi-finished product of the electromagnetic shielding sealing ring is conveyed to the site, reserved interfaces at the straight line section are directly bonded together, and the finished electromagnetic shielding sealing ring is formed. And during bonding, the corner is bonded by adopting a vulcanization process. The vulcanization condition is determined according to the difference of the electromagnetic shielding sealing strip 1, and gas generated in the vulcanization process can overflow from the cavity of the electromagnetic shielding sealing strip 1, so that the internal inflation of the electromagnetic shielding sealing strip 1 can not be caused, and the deformation of the electromagnetic shielding sealing strip 1 can be caused. The installation mode is quick, simple and convenient, the interface is firm after bonding, the performance is reliable, the electromagnetic shielding leakage at the joint is small, the shielding test meets the design requirement, and the stable sealing performance is maintained even if the perimeter of the electromagnetic shielding sealing ring is changed due to thermal expansion and cold contraction.
An electronic equipment, includes the shielding part, and the shielding part includes above-mentioned electromagnetic shield sealing washer. The shielding well comprises a well cover and a well cover seat, and the electromagnetic shielding sealing ring is arranged at the joint of the well cover and the well cover seat. The existence of electromagnetic shielding sealing ring has strengthened well lid electromagnetic pulse shielding performance, possesses rain-proof sealed function, improves the survivability of equipment in the well in the electromagnetic interference environment.
The electromagnetic shielding sealing strip, the electromagnetic shielding sealing ring and the electronic device provided by the application are introduced in detail, specific examples are applied in the description to explain the principle and the implementation of the application, and the description of the embodiments is only used for helping to understand the method and the core idea of the application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (9)
1. An electromagnetic shielding sealing tape, comprising:
the sealing strip comprises a sealing strip body (11), wherein the sealing strip body (11) is provided with a preset elastic deformation cavity, the interior of the sealing strip body is provided with an extending deformation cavity, and the cavity is not communicated with the outside;
the conductive layer (12), the outside of sealing strip body (11) is wrapped in to conductive layer (12).
2. An electromagnetic shielding gasket according to claim 1, wherein said gasket body (11) comprises a foamed gasket.
3. An electromagnetic shielding gasket according to claim 1 wherein said cavity comprises an upper cavity and a lower cavity, said upper cavity having an area greater than an area of said lower cavity.
4. An electromagnetic shielding gasket according to claim 3, wherein said upper cavity and said lower cavity are symmetrical with respect to the central axis of said gasket body (11).
5. An electromagnetic shielding gasket according to claim 1, wherein said conductive layer (12) has a predetermined resistance value, and said conductive layer (12) comprises a conductive cloth layer.
6. An electromagnetic shielding gasket according to claim 1, wherein said gasket body (11) further comprises a fixing portion (111), said fixing portion (111) being used for fixing said gasket body (11) to a member to be installed.
7. An electromagnetic shielding gasket, characterized in that it is formed by bonding a plurality of the electromagnetic shielding gaskets (1) according to any one of claims 1 to 6.
8. The electromagnetically shielded seal ring of claim 7, wherein the electromagnetically shielded seal ring is mated to the sealing track on the mounting member.
9. An electronic device, characterized in that it comprises a shielding part comprising an electromagnetic shielding gasket according to any one of claims 7 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120461715.2U CN215872551U (en) | 2021-03-03 | 2021-03-03 | Electromagnetic shielding sealing strip, electromagnetic shielding sealing ring and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120461715.2U CN215872551U (en) | 2021-03-03 | 2021-03-03 | Electromagnetic shielding sealing strip, electromagnetic shielding sealing ring and electronic equipment |
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| Publication Number | Publication Date |
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| CN215872551U true CN215872551U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120461715.2U Active CN215872551U (en) | 2021-03-03 | 2021-03-03 | Electromagnetic shielding sealing strip, electromagnetic shielding sealing ring and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114803368A (en) * | 2022-04-18 | 2022-07-29 | 山东灵犀院科技发展股份有限公司 | Rolling element with good sealing performance |
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2021
- 2021-03-03 CN CN202120461715.2U patent/CN215872551U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114803368A (en) * | 2022-04-18 | 2022-07-29 | 山东灵犀院科技发展股份有限公司 | Rolling element with good sealing performance |
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