CN212660492U - Anti-drop tensile electromagnetic shielding element and system - Google Patents
Anti-drop tensile electromagnetic shielding element and system Download PDFInfo
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- CN212660492U CN212660492U CN202021578811.7U CN202021578811U CN212660492U CN 212660492 U CN212660492 U CN 212660492U CN 202021578811 U CN202021578811 U CN 202021578811U CN 212660492 U CN212660492 U CN 212660492U
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Abstract
The utility model relates to an electromagnetic shield component and system of anticreep tensile. The electromagnetic shielding element of the utility model has a longitudinal length, comprising a first part composed of conductive material and a second part composed of non-conductive material, wherein the second part is a closed structure along the longitudinal length, and comprises a top part, a bottom part, a left waist part and a right waist part which are symmetrically arranged, and the length of the top part is less than that of the bottom part; elastic protrusions are symmetrically arranged on the top of the electromagnetic shielding element and used for weakening the contact pressure on the electromagnetic shielding element fixed in a groove, and the groove is formed in the first component and/or the second component; the first portion at least partially circumferentially surrounds the second portion in a cross-section of the longitudinal length of the electromagnetic shielding element. The utility model discloses an electromagnetic shield component can realize equipment and fastening under the condition that does not use the adhesive, guarantees shielding and sealed effect.
Description
Technical Field
The utility model relates to an electromagnetic shield component, concretely relates to tensile electromagnetic shield component of anticreep reaches a system including this kind of component.
Background
In order to enable the electrical equipment to operate normally without interference from other signals, the electrical equipment is generally surrounded by a conductive housing for shielding. Meanwhile, in some cases where access to the electrical equipment is required, such as regular maintenance and daily repair, the housing needs to be opened, and thus the shielding effect needs to be achieved by complete closing when the housing is closed, and the housing also needs to be opened, the contact surface between the housing and the cover needs to be conductive and the opening needs to be sealable when the housing is opened, and if two rigid materials are completely closed at the closing position, an elastic gasket needs to be used on the contact surface between the housing and the cover, so that an elastic conductive gasket element is necessary for the shielding requirement of the electrical equipment.
According to the requirement, the element is composed of two parts, namely a conductive material and a non-conductive material, wherein the conductive part is used for providing electric contact between the surface and the lower surface of the open-close position in a closed state; the non-conductive material portion provides an environmental seal for the opening and closing to prevent moisture, dust, etc. from intruding into the electrical apparatus.
In order to fix the elastic conductive gasket on the contact surface of the opening and closing part, generally, the adhesive is coated on the contact surface in advance in the industry, and the gasket element can be fixed on the contact surface of the opening and closing part through the adhesive action of the adhesive, so that the gasket element can keep the position for a long time.
In general, the temperature resistance of the adhesive is poor compared with the temperature resistance of the material of which the component is made, so that the adhesive is easily softened or vitrified to fail in the application environment, especially in the relatively severe application environment such as a damp heat environment, a high temperature environment or a low temperature environment. In addition, the presence of adhesives can also interfere with the removal and repair of the components when problems arise in the manufacture of the components themselves or when there is residual material in the grooves.
Meanwhile, when the shielding element is assembled, a problem may occur in that a person may stretch the elastic gasket during operation, so that the element may be deformed, i.e., may be longer than a predetermined length, which may cause problems such as insufficient assembly space and deformation of the gasket.
Disclosure of Invention
The utility model aims at solving the problem, the utility model provides an electromagnetic shield component and system of anticreep tensile. The utility model discloses a magnetic shielding element system allows the subassembly to shield under the condition of not using the adhesive, the utility model discloses an electromagnetic shielding component is simple and more reliable, and the elasticity that the structure of electromagnetic shielding component narrow-end-down width shows can realize equipment and fastening under the condition of not having the adhesive, guarantees shielding and sealed effect; the B-shaped protrusions of the non-conductive material part can be made of high-modulus elastic materials, and can also be formed into elements by co-extrusion, so that the deformation of the elements during installation can be reduced, and the stability of the element shape can be ensured.
In order to solve the technical problem, the utility model discloses a following technical scheme: an anti-drop and tensile electromagnetic shielding element has a longitudinal length, and comprises a first part made of a conductive material and a second part made of a non-conductive material, wherein the second part is of a closed structure along the longitudinal length and comprises a top part, a bottom part, a left waist part and a right waist part which are symmetrically arranged, and the length of the top part is smaller than that of the bottom part;
elastic protrusions are symmetrically arranged on the top of the electromagnetic shielding element and used for weakening the contact pressure on the electromagnetic shielding element fixed in a groove, and the groove is formed in the first component and/or the second component;
the first portion at least partially circumferentially surrounds the second portion in a cross-section of the longitudinal length of the electromagnetic shielding element.
The elastic protruding part is formed by co-extrusion of the first part or the second part and comprises a first protruding part and a second protruding part, and a lying B-shaped structure is formed between the elastic protruding part and the top.
The electromagnetic shielding element is provided with a continuous bore along a longitudinal length.
The top and the bottom are in transition with the left waist part and the right waist part through an outwards-protruding arc structure.
The first part comprises an elastic material mixed with conductive particles, and the elastic material is an elastic material comprising silicon rubber or polyurethane.
The second portion is a non-conductive elastomeric material comprising silicone or polyurethane.
The first and second portions are arranged side-by-side in a cross-section of the longitudinal length of the electromagnetic shielding element, and when the electromagnetic shielding element is fitted between the oppositely positioned first and second components, the first portion forms an electrical connection between the first and second components, and the second portion forms an environmental seal between the first and second components.
An electromagnetic shielding system against detachment and tension, comprising an electromagnetic shielding element, a first member and a second member, the first member and the second member being provided with a groove in contact surfaces thereof between the first member and the second member in a state of being formed together;
the electromagnetic shielding element has an upper surface provided with an elastic protrusion for weakening a contact pressure to which the electromagnetic shielding element fixed in the groove is subjected, and when the electromagnetic shielding element is fitted into the groove, the first portion forms an electrical connection between the first member and the second member, and the second portion forms an environmental seal between the first member and the second member.
Compared with the prior art, the utility model has the advantages of it is following:
(1) the utility model discloses a wide design under the upper and lower narrow of electromagnetic shield component can fix electromagnetic shield component in the slot under the condition that does not use the adhesive, can prevent to drop, can ensure electromagnetic shield component and slot fully contact again, and the elasticity that upper and lower narrow wide structure shows can realize equipment and fastening under the condition that does not have the adhesive, guarantees shielding and sealed effect.
(2) The utility model discloses an electromagnetic shield component top B font jut can make the component have more flexibility and reduce the contact pressure under the mounted state. The B-shaped protruding part of the second part, namely the non-conductive material part, can be made of high-modulus elastic materials according to needs, and the element is formed in a co-extrusion mode.
(3) The electromagnetic shielding element of the present invention has both the conductive portion and the non-conductive portion from the bottom to the top in the longitudinal direction, so that it can be further ensured that the contact pressure is always present and the desired shielding can be obtained along the entire longitudinal length of the element when assembling.
(4) The first part and the second part are made of elastic materials, and can play a role in sealing the environment, namely preventing substances such as moisture and dust from invading into the electrical equipment. The first part for the electromagnetic shielding element comprises an elastic material containing conductive particles and the second part comprises an elastic material, said elasticity allowing the second part to be deformed when the electromagnetic shielding element is mounted, thereby facilitating fixing of the electromagnetic shielding element when the element is mounted. The electromagnetic shielding element is further provided with a continuous hole, as seen in a cross-section transverse to its longitudinal length, which may be further compressed when the first and second parts are formed together.
Drawings
Fig. 1 is a cross-sectional view of the anti-dropping and tensile electromagnetic shielding element of the present invention.
Fig. 2 is a cross-sectional view of the anti-drop and anti-tensile electromagnetic shielding system of the present invention. For illustrative reasons, the two components are not adequately formed together.
Description of reference numerals: 1-an electromagnetic shielding element; 2-a first part; 3-a second part; 4-a resilient protrusion; 5-continuous pores; 6-a groove; 7-a first component; 8-a second component; 31-top; 32-bottom; 33-left waist; 34-right waist; 41-a first protrusion; 42-a second protrusion; 9-high modulus elastic material.
Detailed Description
The following describes the embodiments of the present invention in detail with reference to the drawings and the technical solutions.
As shown in fig. 1, an anti-drop and anti-tensile electromagnetic shielding element 1 has a longitudinal length, and comprises a first part 2 made of a conductive material and a second part 3 made of a non-conductive material, wherein the second part 3 is a closed structure along the longitudinal length and comprises a top part 31, a bottom part 32, and a left waist part 33 and a right waist part 34 which are symmetrically arranged, and the length of the top part 31 is smaller than that of the bottom part 32;
the top of the electromagnetic shielding element 1 is symmetrically provided with elastic protrusions 4, the elastic protrusions 4 are used for weakening the contact pressure of the electromagnetic shielding element 1 fixed in the groove 6, the groove 6 is formed in the first component 7 and/or the second component 8, and in a specific embodiment, the groove 6 is formed in the second component 8;
the first portion 2 at least partially surrounds the second portion 3 in the circumferential direction when viewed in a cross-section transverse to the longitudinal length of the electromagnetic shielding element 1.
Because the length of the top part 31 is less than that of the bottom part 32, the design of the wide bottom part enables the electromagnetic shielding element 1 to be fixed in the groove 6 so as to generate contact pressure, thus preventing the electromagnetic shielding element from falling off, fixing the position of the electromagnetic shielding element, ensuring the element to be in full contact with the groove 6 and ensuring the shielding and sealing effects.
The term "partially circumferential geometry" means that the first part and the second part extend through a separation plane between the first part and the second part when they are formed together and thereby provide a large contact surface against the parts. The contact surface is maintained despite variations in the elements and is created when the two parts are formed together. An advantage of partially enclosing the first part is that the amount of material of this part of the element can be optimized with respect to the electrical conductivity and according to costs.
The electromagnetic shielding element 1 may be produced by extrusion, in particular co-extrusion. Co-extrusion allows the use of two or more different materials in the electromagnetic shielding element 1 to thereby obtain different properties observed in the cross-section. The co-extruded electromagnetic shielding element 1 may be extruded to have an infinite length and then cut to an appropriate length according to the application field.
The electromagnetic shielding element has two portions oriented side by side when viewed in a cross-section transverse to the longitudinal length of the element: a first part 2 consisting of an electrically conductive material and a second part 3 consisting of an electrically non-conductive material. The first portion 2 is arranged as a layer partially surrounding the second portion 3 in the circumferential direction. The degree of partial enclosure may vary based on the cross-sectional geometry. The first part 2 surrounds the second part 3 by virtue of the properties of the first part 2, and when the electromagnetic shielding element 1 is arranged between the first part 7 and the second part 8, the first part 2 extends over and through a partition plane between the two parts and at least over a corner portion of the groove 6 where the electromagnetic shielding element 1 is intended to be mounted.
The elastic protrusion 4 is formed by co-extruding the first part 2 or the second part 3, and comprises a first protrusion 41 and a second protrusion 42, and a lying B-shaped structure is formed between the elastic protrusion 4 and the top 31. The high modulus elastic material is selected at 41 or 42 (or 41 and 42), so that the tensile resistance of the element 1 is improved, and the effect of deformation of the electromagnetic shielding element caused by artificially stretching the electromagnetic shielding element in the installation process is weakened.
The elastic material of the elastic protrusion 4 can obtain elastic characteristics, and the B-shaped protrusion design can weaken the contact pressure generated when the cover plate is pressed down, so that the electromagnetic shielding element 1 has more flexibility.
The material of the resilient projection 4 need not be the same as the first part 2 or, alternatively, need not be the same as the second part 3.
The electromagnetic shielding element 1 is provided with a continuous hole 5 along the longitudinal length, and the continuous hole 5 is a hole with an indefinite shape including a square, a triangle or a circle. The continuous hole 5 forming the passage allows the electromagnetic shielding element 1 to be further compressed when the first and second parts 7, 8 are brought together. One function of the continuous hole 5 in the electromagnetic shielding element 1 is: compared to an electromagnetic shielding element 1 without holes, material and thus costs can be saved. In the embodiment shown, the shape of the continuous hole 5 is rectangular, but may also be other shapes such as triangular or circular.
The top portion 31, the bottom portion 32 and the left waist portion 33 and the right waist portion 34 are transited by an outwardly protruding arc structure.
The first part 2 comprises an elastomeric material mixed with conductive particles, the elastomeric material being an elastomeric material including silicone rubber, polyurethane, thermoplastic elastomer. Optionally, the first part 2 is composed of conductive silicone, the conductivity being achieved or increased by mixing conductive particles with an elastic material. The particles may be composed of pure materials such as Ag or Ni, but may also be composed of coated metal particles such as Ag/Cu, Ag/glass, Ag// Ni, Ag/AI, Ni/C, etc. But also alloys of these materials. The particles may be 10-90 weight percent, and preferably 40-80 weight percent. The particle size may be between 10 and 220 microns in diameter, with the average particle size being about 25-150 microns in diameter. The particles are preferably mixed to form a homogeneous mixture.
The second portion 3 is an electrically non-conductive elastic material comprising silicone, polyurethane or a thermoplastic elastomer.
The first part 2 and the second part 3 are arranged side by side when seen in a cross-section transverse to the longitudinal length of the electromagnetic shielding element 1, and the first part 2 forms an electrical connection between the first part 7 and the second part 8 and the second part 3 forms an environmental seal between the first part 7 and the second part 8 when the electromagnetic shielding element 1 is fitted between the oppositely positioned first part 7 and second part 8.
The electromagnetic shielding element 1 may be extruded to an infinite length, although lengths of several hundred to several kilometers are typically formed. Before use, the element 1 is cut to a suitable length, and in case the electromagnetic shielding element 1 is used, for example, in a base station in the telecommunications industry, a length of between 0.1 and 2.1 meters is typical. The electromagnetic shielding element 1 has a typical height and width of 0.8-12mm, preferably between 1.5mm and 5.5 mm. In some applications, the electromagnetic shielding element 1 may be connected together/in a closed loop by vulcanization or gluing prior to bonding or assembly.
An electromagnetic shielding system against detachment and tension includes an electromagnetic shielding element 1, a first member 7 and a second member 8, the first member 7 and the second member 8 being provided with a groove 6 in contact surfaces thereof between the first member 7 and the second member 8 in a state of being formed together;
the top of the electromagnetic shielding element 1 is provided with an elastic protrusion 4 for weakening the contact pressure to which the electromagnetic shielding element 1 fixed in the groove 6 is subjected, and when the electromagnetic shielding element 1 is fitted into the groove 6, the first part 2 forms an electrical connection between the first component 7 and the second component 8, and the second part 3 forms an environmental seal between the first component 7 and the second component 8.
The electromagnetic shielding element 1 is arranged to be fitted between a first part 7 and a second part 8 consisting of a cover and a housing in which the electrical apparatus is to be placed. The electromagnetic shielding element 1 is arranged in a groove 6, which groove 6 may be formed in any one of the first member 7, the second member 8 or in the contact surfaces in the first member 7 and the second member 8. When the first and second parts 7, 8 are in contact with the electromagnetic shielding element 1 in the formed together state, the first and second parts 7, 8 will form an electrical shielding for a piece of electrical equipment. It will be appreciated that even if the description is based on the first component 7 and the second component 8, further components may be constituted.
When the electromagnetic shielding element 1 is fitted into the groove 6 of the second part 8, the electromagnetic shielding element 1 is forced down into the groove 6, whereby the top B-shaped protrusion 4 yields due to its elasticity, the bottom of the electromagnetic shielding element 1 in the groove 6 tries to spring back to its original position, but due to the wide design of the bottom the element 1 is fixed in the groove creating a contact pressure which makes the conductive side, i.e. the first part 2 always in contact with the second part 8, the same applies to the environmental sealing action of the second part 3, a corresponding effect also occurring when the first part 7 is arranged on top of the first part 8 to form a lid. The first part 2 and the second part 3 of the electromagnetic shielding element 1 then extend at least in the plane of separation between the first part 7 and the second part 8, respectively, to achieve shielding or sealing against the environment.
If the adhesive is used, the adhesive is easy to soften or vitrify and then fail in a severe application environment; in addition, when the manufacturing element has problems or residual substances exist in the groove, the removal and repair of the element can be influenced by the existence of the adhesive; furthermore, the adhesive also makes it possible for the component to make insufficient electrical contact with the bottom of the trench. The elastic properties of the electromagnetic shielding element 1 of the present invention, however, ensure that the contact pressure is always present and that the desired shielding can be obtained along the entire longitudinal length of the element 1.
It is roughly estimated that the shielding can be improved by up to 60dB based on frequency compared to using an adhesive.
Claims (8)
1. An anti-drop and anti-tensile electromagnetic shielding element, wherein the electromagnetic shielding element (1) has a longitudinal length and comprises a first part (2) made of a conductive material and a second part (3) made of a non-conductive material, the second part (3) is of a closed structure along the longitudinal length and comprises a top part (31), a bottom part (32) and a left waist part (33) and a right waist part (34) which are symmetrically arranged, and the length of the top part (31) is smaller than that of the bottom part (32);
the top of the electromagnetic shielding element (1) is symmetrically provided with elastic protrusions (4), the elastic protrusions (4) are used for weakening the contact pressure on the electromagnetic shielding element (1) fixed in a groove (6), and the groove (6) is formed in the first component (7) and/or the second component (8);
the first portion (2) at least partially surrounds the second portion (3) in a circumferential direction in a cross section of a longitudinal length of the electromagnetic shielding element (1).
2. The anti-drop and anti-tensile electromagnetic shielding element according to claim 1, wherein the elastic protrusions (4) are formed by co-extrusion of the first portion (2) or the second portion (3) and comprise a first protrusion (41) and a second protrusion (42), and a lying B-shaped structure is formed between the elastic protrusions (4) and the top portion (31).
3. Anti-detachment and tensile electromagnetic shielding element according to claim 1, characterized in that the electromagnetic shielding element (1) is provided with a continuous hole (5) along a longitudinal length.
4. The electromagnetic shielding element for preventing falling and pulling according to claim 1, wherein the top portion (31), the bottom portion (32) and the left waist portion (33) and the right waist portion (34) are transited by an outwardly protruding arc structure.
5. The electromagnetic shielding element against separation and tension according to claim 1, wherein the first portion (2) comprises an elastic material mixed with conductive particles, and the elastic material is an elastic material comprising silicone rubber or polyurethane.
6. The electromagnetic shielding element against detachment and tensile strength according to claim 1, characterized in that the second portion (3) is a non-conductive elastic material comprising silicone or polyurethane.
7. Anti-drop and tensile electromagnetic shielding element according to claim 1, characterized in that the first part (2) and the second part (3) are arranged side by side in a cross section of the longitudinal length of the electromagnetic shielding element (1), and when the electromagnetic shielding element (1) is fitted between the oppositely positioned first part (7) and second part (8), the first part (2) forms an electrical connection between the first part (7) and the second part (8), and the second part (3) forms an environmental seal between the first part (7) and the second part (8).
8. An anti-drop and tensile electromagnetic shielding system, comprising the electromagnetic shielding element (1) according to any one of claims 1 to 7, a first member (7) and a second member (8), wherein the first member (7) and the second member (8) are provided with a groove (6) between the first member (7) and the second member (8) in contact surfaces thereof in a state of being formed together;
the upper surface of the electromagnetic shielding element (1) is provided with an elastic protrusion (4) for weakening the contact pressure to which the electromagnetic shielding element (1) fixed in the groove (6) is subjected, when the electromagnetic shielding element (1) is fitted into the groove (6), the first part (2) forms an electrical connection between the first component (7) and the second component (8), and the second part (3) forms an environmental seal between the first component (7) and the second component (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021578811.7U CN212660492U (en) | 2020-08-03 | 2020-08-03 | Anti-drop tensile electromagnetic shielding element and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021578811.7U CN212660492U (en) | 2020-08-03 | 2020-08-03 | Anti-drop tensile electromagnetic shielding element and system |
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| Publication Number | Publication Date |
|---|---|
| CN212660492U true CN212660492U (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021578811.7U Active CN212660492U (en) | 2020-08-03 | 2020-08-03 | Anti-drop tensile electromagnetic shielding element and system |
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| CN (1) | CN212660492U (en) |
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- 2020-08-03 CN CN202021578811.7U patent/CN212660492U/en active Active
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