• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    13SAM TOGETHER Element for electromagnetic shielding, which element has a longitudinal extension, and which element, along its longitudinal extension, is co-extruded to form a first portion of an electrically conductive material and a second portion of an electrically non-conductive material. In the element, seen in a cross section across the longitudinal extent of said element, the first portion and the second portion are arranged side by side, and wherein when applying the element between a first and a relatively opposite component, the first portion is arranged so as to form an electrical connection. between the first and second components and the second portion forms an environmental seal between the first and second components. The element has at least one projection along its longitudinal extension, which projection is intended for holding the element when applying it in a groove accommodated in said first and / or second component. Figure 1a and b for publication.
    公开号:SE1050492A1
    申请号:SE1050492
    申请日:2010-05-18
    公开日:2011-11-19
    发明作者:Tore Nilsson
    申请人:Nolato Silikonteknik Ab；
    IPC主号:
    专利说明:

    2 and repair when the element may rupture and leave unwanted residues in the element groove.
    SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide an element for shielding which allows mounting without the use of adhesive.
    A particular object is to provide an element which allows simpler and more reliable mounting of elements for electromagnetic shielding.
    In order to achieve these objects, and also other objects which appear from the following description, an element for electromagnetic shielding, as well as a system, are provided in accordance with the present invention.
    Alternative embodiments of the invention are described in the independent claims.
    More particularly, in accordance with the present invention, there is provided an element for electromagnetic shielding, which element has a longitudinal extension, and which element, along its longitudinal extension, is co-extruded to form a first portion of an electrically conductive material and a second portion of an electrically non-conductive material. conductive material, and in which element, seen in a cross section across the longitudinal extent of said element, the first portion and the second portion are arranged side by side, and wherein in applying said element between a first and a relatively opposite component, the first the portion is arranged so as to form an electrical connection between the first and second components and the second portion forms an environmental seal between the first and second components, and said element having at least one projection along its longitudinal extension, which projection is intended for holding the element when applying this in one of said first and / or r second component busy track.
    An advantage of the present invention is that the element can be attached to the groove through the protrusion without using an adhesive. Adhesive normally has the task of ensuring that an element remains in its groove during assembly and disassembly. Due to the elasticity which the element exhibits with the aid of projections in the longitudinal extent of the element, both mounting and fastening can be achieved without adhesive.
    The resilient properties of the element according to the invention further ensure that the contacting pressure is always present and that the desired shielding is achieved along the entire length distribution of the element.
    By component is meant, for example, a housing or a lid which is arranged to enclose an electrical equipment. There can also be two other types of parts which, when joined together, form abutting abutment surfaces.
    According to one embodiment, said first portion, upon application of the element in a groove accommodated in said first and / or second component, may form an electrically conductive contact surface between said first and second mutually opposite components extending at least over a dividing plane between these components.
    Because the first portion, which contains an electrically conductive material, forms a contact surface which extends over the dividing plane, an electrically conductive contact therebetween is ensured and thus also an electromagnetic shielding between the components when these are brought together.
    According to another embodiment, the first portion of the element, seen in a cross section across the longitudinal extent of said element, may have a geometry which at least partially circumferentially encloses said second portion.
    The term "partially circumferentially enclosing geometry" refers to a portion which extends past the plane of division between the first and second components when they are assembled and thereby provides a large contact surface with the components. This contact surface is maintained regardless of the transformation of the element which occurs when the two the components are brought together.
    It will be appreciated that the geometry and distribution of the contact surface in the groove and across the pitch plane depends on parameters such as the cross-sectional geometry of the element, the geometry of the groove, the geometry of the components and the elasticity of the first and second batch materials.
    The advantage of a partially enclosing first portion is that the amount of material in this part of the element can be optimized both in terms of electrical conductivity and in terms of cost. According to a further embodiment, said second portion, when applying the element in a groove accommodated in said first and / or second component, can form an environmental seal between said first and second mutually opposite components, which environmental seal extends at least over a division plan between these components.
    The environmental seal prevents unwanted material such as moisture and dirt from penetrating the electrical equipment.
    In an embodiment of the element for electromagnetic shielding, the at least one projection can have a geometry resilient in a direction transverse to the longitudinal extent of the element.
    With the aid of the resilient geometry, the element can be mounted by being pressed into place in a groove, whereupon the element by means of the resilient geometry secures the element so that it does not move during assembly and disassembly. Furthermore, the effect of the other party's environmental protection effect is improved. Another effect is that also the first portion, as an effect of the transformation of the second portion, will be pressed closer to its contact surfaces towards the components and over the dividing plane and thereby strengthen the shielding effect.
    Said first portion of the element for electromagnetic shielding may comprise an elastic material accommodating electrically conductive particles.
    Said first portion may comprise a content of electrically conductive particles of 10-80% by weight and more preferably 50-70% by weight.
    Said second portion of the element for electromagnetic shielding may comprise an elastic material. The elasticity allows the reshaping of the second portion when the element is mounted and thereby contributes to holding the element when it is mounted. The element can hereby be mounted without the use of an adhesive.
    According to one embodiment, the element, seen in a cross section across its longitudinal extension, may comprise a hole. The advantage of a hole in the longitudinal extension is that the element can be further compressed when joining said first and second components.
    Furthermore, in accordance with the present invention, there is provided a system comprising an element for electromagnetic shielding and a first and a second component, which components in the assembled state, in their abutment surfaces, delimit a groove between them, and which element has a length extension and is co-extruded to form a first portion of an electrically conductive material and a second portion of an electrically non-conductive material, and in which element, seen in a cross section across its length extension, the first portion and the second portion are arranged side by side, and the element has at least one projection along its longitudinal extension, which projection is intended for holding the element when applying it in said groove, wherein when applying the element in said groove, the first portion is arranged so as to form an electric shielding between the first and the second component and the second portion forms an environmental seal between the fo first and second component.
    The system according to the invention essentially has the properties and advantages which have been discussed above, whereby reference is made to the above discussion.
    DESCRIPTION OF DRAWINGS Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The figures should not be seen as a limitation of the present invention, instead the figures are used to illustrate and gain a better understanding of the invention.
    Figure 1a schematically shows a cross-sectional view with two component parts and an unassembled element.
    Figure 1b schematically shows a cross-sectional view with two component parts and an assembled element. The two components are not fully assembled for illustrative reasons.
    DETAILED DESCRIPTION In Figures 1a and b, to which reference is made, an element 1 for electromagnetic shielding in accordance with the present invention is illustrated. The figures are also representative for illustrating the system according to the invention. The element 1 is arranged to be applied between two components 7, 8 which can for instance consist of a lid and a housing in which electrical equipment is intended to be placed. The element 1 is arranged to be applied in a groove 6 which may be accommodated in an abutment surface of one of the first and second components 7, 8 or in both components 7, 8 in the assembled state, when the two components 7, 8 are in contact with the element 1, the two components 7, 8 are intended to form an electrically shielded enclosure for, for example, an electrical equipment. It will be appreciated that although the description is based on two components 7, 8, they may be more parts.
    Element 1 can be produced by extrusion and then especially co-extrusion. Co-extrusion allows the use of two or more different materials of the element 1 in order to thereby obtain different properties seen in a cross section. The co-extruded element 1 can be extruded to an infinite length which is then cut into suitable lengths according to the area of use.
    Seen in a cross section across the longitudinal extent of the element, the element has two portions 2, 3 which are oriented side by side: a first portion 2 which consists of an electrically conductive material and a second portion 3 which consists of an electrically non-conductive material. In its simplest embodiment, not shown, the element 1 can for instance consist of two geometrically uniform portions of a first and a second material which are co-extruded side by side.
    In the illustrated embodiment, however, the first portion 2 is arranged as a layer which partially circumferentially encloses the second portion 3. The degree of partial enclosure may vary depending on the cross-sectional geometry. For example, an element 1 with a substantially square cross-section, as illustrated, may have a first portion 2 which partially encloses the second portion 3 in that the first portion 2, when the element 1 is arranged between two components 7, 8, extends over and past the dividing plane between the two components 7, 8, and over at least one corner portion of the groove 6 in which the element 1 is intended to be mounted.
    Depending on the geometry of the groove 6, the enclosing portion 2 can extend over the dividing plane between the two components 7, 8 and over and past two corner portions, which are formed when the components 7, 8 are brought together.
    This variant is shown in Figures 1a and 1b. It will be appreciated that the enclosure is dependent on the element 1 and the geometry of the components 7, 8 and that alternative embodiments are possible for securing a contact surface between the components 7, 8 and the element 1.
    As is apparent, the geometric cross-section of the element 1 can be varied almost indefinitely, provided that the element 1, when mounted between two components 7, 8, forms an electrical connection and an environmental seal between the components 7, 8.
    Seen in a cross section across the longitudinal extension of the element 1, in the embodiment shown, two projections 5 are arranged in the second portion 3. The projections have a resilient function which depends on both material choice and geometry.
    By selecting an elastic material in the projections 5, the resilient properties are obtained which are then used to secure the element 1 in a occupied groove 6 of a component. Furthermore, the geometry of the projections 5 is designed so that the projections 5, when subjected to a force during assembly, can change shape, for example by folding in towards the element 1.
    The number of projections 5 may vary depending on the size of the element 1, but a preferred number may be up to three projections. The number of protrusions 5 and the geometry of these depend on the force to be produced between the element 1 and the groove 6 when the element 1 is mounted in the groove 6. The number of protrusions 5 also depends on the size of the element 1, ie how many are practically possible and suitable .
    It will be appreciated that the choice of material and geometry may be determined from a variety of variations and combinations as long as a resilient function may be obtained.
    As an alternative to being part of the second portion 3, the projections 5 with retained function can be formed by the first portion 2 or be co-extruded with the first portion 2 or the second portion 3 and thus form a third or even fourth portion. The material in the projections 5 need not be the same as in the first portion 2 or the second portion 3.
    The projections 5 of the element 1 can have a continuous extension or have an intermittent extension, i.e. projections 5 are located on the element 1 along a part of the element 1 seen in its longitudinal extension followed by a part which lacks projections 5 along its longitudinal extent. The preferred embodiment has a continuous extent for mainly technical reasons.
    In the embodiment shown, the element 1 has a through hole 4 received in the longitudinal extension, the hole 4 which forms a channel enables the element 1 to be further compressed when the two components 7, 8 are brought together. An effect of the hole 4 in the element 1 is that material and thus costs can be saved compared to an element 1 without a hole 4. The shape of the hole 4 in the embodiment shown is circular, but other shapes are also possible, for example triangular or square.
    The geometry of the element 1 seen in a cross section across the longitudinal extent of the element 1 is in the embodiment shown substantially square with a double bead at the top, where each portion 2, 3 forms a bead. The purpose of the beads is to make the element 1 more flexible and increase the contact pressure in the mounted condition.
    The embodiment shown has a double bead towards the part facing the component 7 which acts as a lid. It will be appreciated that double bead is not a requirement for achieving a tight abutment between components 7, 8. Alternative geometries are, for example, a single bead or even a flat surface.
    The first portion 2 of the element is arranged as an electrically conductive material which may comprise an elastic material such as silicone rubber, polyurethane, TPE or the like. Alternatively, the first portion 2 may be an electrically conductive silicone. The electrical conductivity can be achieved or enhanced by mixing electrically conductive particles with the elastic material.
    The particles can consist of pure metal such as Ag or Ni or the like, but also of metal-coated particles such as Ag / Cu, Ag / glass, Ag / Ni, Ag / Al, Ni / C or the like. Alloys of these materials are also possible. The content of particles may be 10-80% by weight and preferably 50-70% by weight.
    The size of the particles can be between 10 and 200 micrometers in diameter with an average particle size of about 40-80 micrometers in diameter.
    The particles are preferably mixed in to form a homogeneous mixture. The second portion 3 of the element is preferably an elastic material type silicone rubber and which is not electrically conductive. For example, the second portion 3 may be a silicone, polyurethane, TPE or the like.
    The element 1 can be extruded to an infinite length, although lengths of several hundred to a thousand meters are common. Prior to use, element 1 is cut to suitable lengths and when using element 1 in, for example, base stations in the telecom industry, lengths of between 0.3 and 2 meters are typical. Typical height and width, respectively, of the element 1 are 1-10 mm, preferably between 2-5 mm. In some applications, the element 1 can be joined / spliced together in connection with or before assembly into a closed loop by vulcanization or gluing.
    When applying the element 1 in a groove 6 of a component 8, this is pressed down into the groove whereupon the projections 5 yield due to their elasticity.
    Placed in the groove 6, the element 1 and its projections 5 strive to spring back to their position (s) of origin, which means that a contacting pressure is achieved which results in the electrically conductive side, ie the first portion 2 always being in contact with the component 8. The same applies the 3 party's environmental protection effect. A corresponding effect also occurs when a second component 7 is arranged on top of the first component 8 to form a lid.
    The element 1 with its first and second portions 2, 3 will then extend at least over the pitch plane between these components 7, 8 to provide shielding and environmental sealing, respectively.
    When using adhesive, a gap must be present between the wall of the groove 6 and the element 1, which means that a contact is not always made between the element 1 and the wall of the component 8. The adhesive also complicates the electrical contact with the bottom of the track. On the other hand, the resilient properties of the element 1 according to the invention ensure that the contacting pressure is always present and that the desired shielding is achieved along the entire longitudinal extent of the element 1.
    It is estimated that shielding can be improved by up to 40 dB depending on frequency compared to using an adhesive.
    Several variants and modifications are possible, so that the scope of the invention is defined exclusively by the claims.
    权利要求:
    Claims (10)
    [1]
    An element (1) for electromagnetic shielding, which element (1) has a longitudinal extension, and which element (1), along its longitudinal extension, is co-extruded to form a first portion (2) of an electrically conductive material and a second portion (3) of an electrically non-conductive material, and in which element (1), seen in a cross-section across the longitudinal extent of said element (1), the first portion (2) and the second portion (3) are arranged side by side, and wherein when applying said element (1) between a first and a relatively opposite component (7, 8), the first portion (2) is arranged so as to form an electrical connection between the first and second components (7, 8) and the second portion (3) forms an environmental seal between the first and second components (7, 8), and wherein said element (1) has at least one projection (5) along its longitudinal extension, which projection (5) is intended for holding the element (1) when applying it to one another said first and / or second component (7, 8) occupied track (6).
    [2]
    Element (1) for electromagnetic shielding according to claim 1, wherein, when applying the element (1) in a groove (6) accommodated in said first and / or second component (7, 8), said first portion (2) forms an electrically conductive contact surface between said first and second mutually opposite components (7, 8) extending at least over a dividing plane between these components (7, 8).
    [3]
    Element (1) for electromagnetic shielding according to any one of the preceding claims, wherein said first portion (2), seen in a cross section across the longitudinal extent of said element (1), has a geometry which at least partially circumferentially encloses said second portion (3 ). 10 15 20 25 30 11
    [4]
    Element (1) for electromagnetic shielding according to claim 1, wherein, when applying the element (1) in a groove (6) accommodated in said first and / or second component (7, 8), said second portion (3) forms an environmental seal between said first and second mutually opposite components (7, 8), which environmental seal extends at least over a dividing plane between these components (7, 8).
    [5]
    Element (1) for electromagnetic shielding according to any one of the preceding claims, wherein said at least one projection (5) has a geometry resilient in a direction transverse to the longitudinal extent of the element (1).
    [6]
    Element (1) for electromagnetic shielding according to any one of the preceding claims, wherein said first portion (2) comprises an elastic material accommodating electrically conductive particles.
    [7]
    Element (1) for electromagnetic shielding according to claim 6, wherein said first portion (2) comprises a content of electrically conductive particles of 10-80% by weight and more preferably 50-70% by weight.
    [8]
    Element (1) for electromagnetic shielding according to any one of the preceding claims, wherein said second portion (3) comprises an elastic material.
    [9]
    An electromagnetic shielding element (1) according to any one of the preceding claims, wherein the element (1), seen in a cross section across the longitudinal extension of said element (1) further comprises a hole (4).
    [10]
    A system comprising an element (1) for electromagnetic shielding and a first and a second component (7, 8), which components (7, 8) in the assembled state, in their abutment surfaces, delimit a groove (6) between them, and which element (1) has a longitudinal extension and is co-extruded to form a first portion (2) of an electrically conductive material and a second portion (3) of an electrically non-conductive material, and 12 of which element (1) , seen in a cross section across its longitudinal extent, the first portion (2) and the second portion (3) are arranged side by side, and the element (1) has at least one projection (5) along its longitudinal extent, which projection (5) is intended for holding the element (1) when applying it in said groove (6), wherein when applying the element (1) in said groove, the first portion (2) is arranged so as to form an electrical shield between the first and the second component (7, 8) and the second portion (3) form an environment eating between the first and second components (7, 8).
    类似技术:
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    同族专利:
    公开号 | 公开日
    SE534851E|2015-12-21|
    CN102511206A|2012-06-20|
    CN102511206B|2015-04-15|
    SE534851C2|2012-01-24|
    WO2011146003A1|2011-11-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPH0821788B2|1989-09-18|1996-03-04|北川工業株式会社|Seal / shield structure|
    US5194691A|1989-11-13|1993-03-16|Gichner Systems Group, Inc.|Gasket and cabinet for providing EMI/RFI shielding|
    US6116615A|1998-08-04|2000-09-12|Lucent Technologies, Inc|Composite weather and electromagnetic radiation gasket for electronic cabinets|
    DE10019567A1|2000-04-20|2001-10-31|Busak & Shamban Gmbh & Co|poetry|
    DE10036471A1|2000-07-25|2002-06-06|Gdt Ges Fuer Dispenstechnik Mb|Method for providing a component with an HF seal|
    JP2004158650A|2002-11-06|2004-06-03|Nec Corp|Electromagnetic wave shield and waterproof structure casing|
    JP2006090463A|2004-09-24|2006-04-06|Nok Corp|Gasket|US10243452B2|2014-11-05|2019-03-26|Abb Schweiz Ag|Electromagnetic shield for use in a power system|
    法律状态:
    2015-10-20| OPRJ| Opposition has been rejected|Effective date: 20140616 |
    2016-05-10| RPOP| Patent has been republished in amended form after opposition|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1050492A|SE534851E|2010-05-18|2010-05-18|Elements and systems for electromagnetic shielding|SE1050492A| SE534851E|2010-05-18|2010-05-18|Elements and systems for electromagnetic shielding|
    CN201180003504.3A| CN102511206B|2010-05-18|2011-05-17|Member and system for electromagnetic shielding|
    PCT/SE2011/050617| WO2011146003A1|2010-05-18|2011-05-17|Member and system for electromagnetic shielding|
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