WO2023138150A1 - 电磁干扰屏蔽件及光学装置 - Google Patents
电磁干扰屏蔽件及光学装置 Download PDFInfo
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- WO2023138150A1 WO2023138150A1 PCT/CN2022/128840 CN2022128840W WO2023138150A1 WO 2023138150 A1 WO2023138150 A1 WO 2023138150A1 CN 2022128840 W CN2022128840 W CN 2022128840W WO 2023138150 A1 WO2023138150 A1 WO 2023138150A1
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- WIPO (PCT)
- Prior art keywords
- layer
- metal layer
- electromagnetic interference
- shielding member
- elastic conductive
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 claims abstract description 85
- 239000002184 metal Substances 0.000 claims abstract description 85
- 239000010410 layer Substances 0.000 claims description 139
- 239000012790 adhesive layer Substances 0.000 claims description 54
- 239000000463 material Substances 0.000 claims description 11
- 230000007423 decrease Effects 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 abstract description 18
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
Definitions
- the utility model relates to the technical field of electromagnetic shielding, in particular to an electromagnetic interference shielding piece and an optical device.
- EMI Electromagnetic Interference
- the inventor found that at least the following problems still exist in the prior art: if a shielding material is installed at the seam, glue will overflow at the position where the shielding material is pasted, and then stick to other moving parts, affecting the function and use of other components.
- the optical transceiver module generates heat during operation, which aggravates the softening and overflow of the glue, so a new shielding member is urgently needed to solve this problem.
- the purpose of the present utility model is to provide an electromagnetic interference shielding member and an optical device.
- the purpose of the present utility model is to provide an electromagnetic interference shielding member and an optical device.
- an embodiment of the utility model provides an electromagnetic interference shielding member, including a metal layer, an elastic conductive layer and a first adhesive layer, the metal layer is electrically connected to the elastic conductive layer, and the elastic conductive layer is pasted on the part to be pasted through the first adhesive layer;
- the metal layer is sheet-like, on a plane parallel to the metal layer:
- the area of the metal layer is larger than that of the first adhesive layer, and the metal layer completely covers the first adhesive layer.
- the area of the elastic conductive layer is equal to that of the first adhesive layer, and the elastic conductive layer completely covers the first adhesive layer.
- it also includes a second adhesive layer, and the metal layer is pasted on the elastic conductive layer through the second adhesive layer;
- the area of the metal layer is equal to that of the second adhesive layer, and the metal layer completely covers the second adhesive layer.
- the materials of the first adhesive layer and the second adhesive layer are both set to be conductive adhesive.
- the metal layer is set as copper foil, aluminum foil or silver foil.
- the surface of the metal layer is provided with a conductive anti-rust coating.
- the elastic conductive layer is made of a material with sparse pores, and when pressure is applied on the surface of the metal layer, the thickness of the elastic conductive layer decreases.
- the material of the elastic conductive layer is set as conductive cloth or conductive foam.
- an embodiment of the utility model provides an optical device, including the above-mentioned electromagnetic interference shielding part, and the electromagnetic interference shielding part is used to fill the gap of the optical device.
- the utility model has the following beneficial effects: after the electromagnetic interference shielding member is pasted on the part to be pasted, the first glue layer is pasted on the part to be pasted.
- the first glue layer is pasted on the part to be pasted.
- the first glue layer will not overflow to the outside of the metal layer, avoiding the bonding of the first glue layer and other structural components other than the metal layer, and then protecting the normal movement of other structures.
- Fig. 1 is the structural representation of the electromagnetic interference shielding part of an embodiment of the utility model
- Fig. 2 is a side view of an electromagnetic interference shielding member according to an embodiment of the present invention.
- Fig. 3 is a schematic diagram of observing the electromagnetic interference shielding member from the direction of the second glue layer according to an embodiment of the present invention
- Fig. 4 is a schematic structural view of an optical device according to an embodiment of the present invention.
- Fig. 5 is an exploded view of an optical module according to an embodiment of the present invention.
- Fig. 6 is a diagram of the installation positions of the shell, the electromagnetic interference shielding piece and the pull ring shrapnel according to an embodiment of the present invention
- optical device 1000, optical device; 100, optical module; 10, electromagnetic interference shielding member; 101, void; 11, metal layer; 12, second adhesive layer; 13, elastic conductive layer; 14, first adhesive layer; 20, shell;
- An embodiment of the present invention provides an electromagnetic interference shielding part and an optical device.
- the electromagnetic interference shielding part is shown in Figures 1 to 3, the optical device is shown in Figure 4, and the installation position of the electromagnetic interference shielding part in the optical device is shown in Figures 5 and 6.
- the electromagnetic interference shielding part is used to fill gaps in the optical device and prevent electromagnetic waves in the optical device from radiating outward.
- the optical device 1000 in this embodiment includes a slot cage 200 and an optical module 100 , the slot cage 200 has a plug interface, and the optical module 100 is pluggably connected to the slot cage 200 .
- the optical module 100 is inserted into the socket cage 200 toward the socket.
- the optical device 1000 further includes a conductive spring 210 connected to the socket cage 200 .
- the front and rear directions are defined by the insertion and removal direction of the optical module 100, and the insertion direction of the optical module 100 is specifically defined as "front”, and the extraction direction of the optical module 100 is specifically defined as "rear”.
- the optical module 100 includes a housing 20 , a tab assembly 30 and an electromagnetic interference shielding member 10 .
- the pull ring assembly 30 is movably connected with the casing 20 , and the electromagnetic interference shielding member 10 is arranged between the casing 20 and the pull ring assembly 30 .
- the pull ring assembly 30 includes a pull ring elastic piece 31, the housing 20 includes a side wall 21, and a guide groove 22 disposed on the side wall 21, the pull ring elastic piece 31 is disposed in the guide groove 22, and the electromagnetic interference shielding member 10 can be arranged between the side wall 21 and the pull ring elastic piece 31.
- the electromagnetic interference shielding member 10 includes a metal layer 11, an elastic conductive layer 13 and a first adhesive layer 14, the metal layer 11 is electrically connected to the elastic conductive layer 13, and the elastic conductive layer 13 is pasted on the article to be pasted by the first adhesive layer 14.
- the electromagnetic interference shielding member 10 also includes a second adhesive layer 12, the metal layer 11 is pasted on the elastic conductive layer 13 through the second adhesive layer 12, the materials of the first adhesive layer 14 and the second adhesive layer 12 are all set as conductive adhesive, combined with the conductivity of the metal layer 11 and the electrical conductivity of the elastic conductive layer 13, the electrical conductivity of the electromagnetic interference shielding member 10 makes it have excellent electromagnetic shielding effect.
- the metal layer 11 can also be connected to the elastic conductive layer 13 by welding, clamping, etc. to ensure the reliability and conductivity of the connection between the metal layer 11 and the elastic conductive layer 13 .
- the elastic conductive layer 13 is made of a material with sparse pores, and when pressure is applied on the surface of the metal layer 11 , the thickness of the elastic conductive layer 13 decreases. That is to say, the elastic conductive layer 13 can be compressed, and its thickness decreases when subjected to an external force, and can return to its original thickness when the external force is removed.
- the distance between the tab assembly 30 and the housing 20 can be changed.
- the elastic conductive layer 13 is compressed, and the elastic conductive layer 13 has a tendency to drive the tab assembly 30 away from the housing 20 under the action of its own elastic force.
- the elastic conductive layer 13 resumes its deformation, so that the tab assembly 30 returns to its original position.
- the material of the elastic conductive layer 13 is set as conductive cloth or conductive foam, which has a fluffy texture and meets the requirements of the elastic deformation of the elastic conductive layer 13 and its return to the original thickness after deformation.
- the metal layer 11 can be set as copper foil, aluminum foil or silver foil and other materials with good conductivity.
- the side of the metal layer 11 far away from the elastic conductive layer 13 can be provided with a conductive anti-rust coating.
- long-term use can also prevent rust.
- the coating can reduce the coefficient of friction, so that the relative sliding resistance between the metal layer 11 and other external parts is smaller.
- the metal layer 11 is sheet-shaped, and on a plane parallel to the metal layer 11: the area of the metal layer 11 is larger than the first adhesive layer 14, and the metal layer 11 completely covers the first adhesive layer 14, as shown in Figures 1-3. Since the area of the metal layer 11 is larger, and in a direction perpendicular to the plane where the metal layer 11 is located, the first adhesive layer 14 is completely inside the orthographic projection of the metal layer 11 . When the first adhesive layer 14 is squeezed or has a tendency to flow after being heated, the expanded first adhesive layer 14 is still inside the orthographic projection of the metal layer 11 .
- the area of the elastic conductive layer 13 is equal to that of the first adhesive layer 14 , and the elastic conductive layer 13 completely covers the first adhesive layer 14 . That is to say, the positions where the elastic conductive layer 13 and the first adhesive layer 14 are bonded have the same shape and area, so that the elastic conductive layer 13 and the surface of the object to be pasted can be pasted more firmly without loosening or warping. That is to say, the area of the metal layer 11 is larger than that of the elastic conductive layer 13, and the metal layer 11 completely covers the elastic conductive layer 13, as shown in FIGS.
- the area of the metal layer 11 is equal to the second adhesive layer 12, and the metal layer 11 completely covers the second adhesive layer 12.
- the distance between the edge of the metal layer 11 and the edge of the adjacent elastic conductive layer 13 is not more than 5 mm. In practice, it can be about 1 mm, that is, the distance between the edge of the metal layer 11 and the edge of the elastic conductive layer 13 in FIGS.
- both the metal layer 11 and the elastic conductive layer 13 are arranged in a square shape, and the length and/or width of the elastic conductive layer 13 are smaller than the metal layer 11 .
- the center point of the elastic conductive layer 13 and the center point of the metal layer 11 are both on the first extension line, and the first extension line is perpendicular to the plane where the metal layer 11 is located.
- the central positions of the metal layer 11 and the elastic conductive layer 13 are the same, and the structure is symmetrical, that is to say, the width of the gaps 101 on the upper and lower sides of the elastic conductive layer 13 is the same, and the width of the gaps 101 on the front and rear sides is the same, so that the glue is not easy to overflow from the side with a smaller distance to the outside of the metal layer 11.
- the following describes the installation of the electromagnetic interference shielding member 10 from the perspective of the optical module 100. There are two implementation modes for the installation of the electromagnetic interference shielding member 10:
- the elastic conductive layer 13 is pasted on the housing 20 through the first adhesive layer 14 , and the pull ring assembly 30 is in contact with the metal layer 11 .
- the elastic conductive layer 13 is pasted on the housing 20 through the first adhesive layer 14 , and the pull ring assembly 30 is in contact with the metal layer 11 .
- the spatial position of the electromagnetic interference shielding member 10 in FIG. 5 to illustrate the installation method of this embodiment.
- the elastic conductive layer 13 is pasted on the tab assembly 30 through the first adhesive layer 14, the shell 20 is in contact with the metal layer 11, the gap 101 faces the tab assembly 30 and is away from the shell 20, the electromagnetic interference shielding member 10 is pasted on the tab assembly 30, and the metal layer 11 is in contact with the shell 20.
- the pull ring assembly 30 includes a pull ring elastic piece 31
- the housing 20 includes a side wall 21
- the electromagnetic interference shielding member 10 is disposed between the side wall 21 and the pull ring elastic piece 31 .
- the elastic conductive layer 13 When the distance between the pull ring shrapnel 31 and the housing 20 tends to decrease, the elastic conductive layer 13 has a tendency to drive the pull ring shrapnel 31 away from the housing 20, and the elastic conductive layer 13 increases the elasticity of the pull ring shrapnel 31, so that the pull ring shrapnel 31 can be in better contact with the conductive shrapnel 210 on the slot cage 200, and the gap between the pull ring shrapnel 31 and the conductive shrapnel 210 is avoided because the gap between the optical module 100 and the slot cage 200 is too large. circuit breaker problem.
- the pull ring elastic piece 31 is slidably connected in the guide groove 22. After the housing 20 and the pull ring assembly 30 are assembled together in the housing structure of the optical module 100, when the pull ring assembly 30 is pulled, the pull ring elastic piece 31 can slide back and forth in the guide groove 22 on both sides of the housing 20. In addition, locking and unlocking can be performed through the locking structure on the optical module 100 , so as to realize the function of installing and dismounting the optical module 100 and the slot cage 200 .
- the electromagnetic interference shielding member 10 is in relatively smooth contact with the side wall 21 or the pull ring elastic piece 31, so that the pull ring assembly 30 slides back and forth, on the one hand, the electromagnetic interference shielding member 10 is always held between the side wall 21 and the pull ring elastic piece 31, and on the other hand, the smooth sliding of the pull ring assembly 30 is guaranteed.
- the metal layer 31 is in contact with the side wall 21 or the elastic tab 31 of the pull ring.
- the surface of the metal layer 11 is smooth and has low roughness, so that it can be in contact with other components relatively smoothly.
- the metal layer 11 is set in a square shape, and the width of the pull ring shrapnel 31 is the same as that of the metal layer 11.
- the width of the pull ring shrapnel 31 and the width of the metal layer 11 are both thicknesses in the up and down direction.
- the leakage of electromagnetic waves is from front to back, and diffuses outward through the gap between the optical module 100 and the housing 20, so filling in the up and down direction can completely fill the gap and avoid the leakage of electromagnetic waves.
- the pull ring assembly 30 includes pull ring shrapnel 31 respectively arranged on the left and right sides of the housing 20 , between the pull ring shrapnel 31 on the left side and the housing 20 , and between the pull ring shrapnel 31 on the right side and the housing 20 , an electromagnetic interference shielding member 10 is provided. Electromagnetic interference shielding parts 10 are arranged on the left and right sides, so that the tab shrapnel 31 on the left has a tendency to move to the left, and the tab shrapnel 31 on the right side has a tendency to move to the right. On the one hand, both sides can be fully filled, and on the other hand, both sides are evenly stressed.
- the EMI shielding member 10 is directly installed on the pull ring assembly 30 and the housing 20, the pull ring shrapnel 31 will be partially lifted up. If the thickness of the EMI shielding member 10 is relatively thin, within the range of the gap, the EMI shielding member 10 can be added to the existing optical module 100, as shown in FIG. 5 .
- a groove can be provided on the surface of the side wall 21, and the electromagnetic interference shielding member 10 is partially embedded in the groove, so as to prevent the optical module 100 from being unable to be inserted into the slot cage 200 and causing interference problems.
- this embodiment has the following beneficial effects:
- the first adhesive layer 14 is pasted on the part to be pasted.
- the first adhesive layer 14 will not overflow to the outside of the metal layer 11, avoiding the bonding of the first adhesive layer 14 to other structural components other than the metal layer 11, and then protecting the normal movement of other structures.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
一种电磁干扰屏蔽件（10）及光学装置（1000），电磁干扰屏蔽件（10）包括金属层（11）、弹性导电层（13）和第一胶层（14），金属层（11）连接于弹性导电层（13），弹性导电层（13）通过第一胶层（14）粘贴于待粘贴件，该电磁干扰屏蔽件（10）粘贴于待粘贴件后，第一胶层（14）粘贴于待粘贴件上，当部分第一胶层（14）受挤压或融化出现流动的趋势时，由于金属层（11）面积大于第一胶层（14），且金属层（11）完全覆盖第一胶层（14），所以第一胶层（14）不会溢出至金属层（11）外侧，避免了第一胶层（14）与金属层（11）以外的其他结构部件粘接，继而保护了其他结构的正常运动。
Description
本实用新型涉及的电磁屏蔽技术领域，尤其涉及一种电磁干扰屏蔽件及光学装置。
随着金属封装的光收发模块的传输速率加快，越来越多地涉及电磁干扰EMI(Electromagnetic Interference，以下简称EMI)，即使是细微的结构缝隙，也会很容易导致模块产生的电磁波从间隙泄漏出去产生EMI问题，影响其他电子元件的正常运行。
在解决EMI问题的过程中，发明人发现现有技术中至少还存在如下问题：若在接缝处设置屏蔽材料，屏蔽材料粘贴的位置会有胶溢出，继而粘到其他的活动部件上，影响其他元件的功能与使用。尤其是光收发模块工作时产生热量，加剧了胶的软化和溢出，因此迫切需要一种新的屏蔽件以解决该问题。
为解决上述的现有技术问题中的至少其一，本实用新型的目的在于提供一种电磁干扰屏蔽件及光学装置。
为解决上述的现有技术问题中的至少其一，本实用新型的目的在于提供一种电磁干扰屏蔽件及光学装置。
为实现上述实用新型目的，本实用新型一实施方式提供一种电磁干扰屏蔽件，包括金属层、弹性导电层和第一胶层，所述金属层电连接于所述弹性导电层，所述弹性导电层通过第一胶层粘贴于待粘贴件；
所述金属层为片状，在平行于所述金属层所在的平面上：
所述金属层面积大于所述第一胶层，且所述金属层完全覆盖所述第一胶层。
作为本实用新型的进一步改进，在平行于所述金属层所在的平面上：所述弹性导电层面积等于所述第一胶层，且所述弹性导电层完全覆盖所述第一胶层。
作为本实用新型的进一步改进，还包括第二胶层，所述金属层通过所述第二胶层粘贴于所述弹性导电层；
在平行于所述金属层所在的平面上：所述金属层面积等于所述第二胶层，且所述金属层完全覆盖所述第二胶层。
作为本实用新型的进一步改进，所述第一胶层和所述第二胶层的材料均设置为导电胶。
作为本实用新型的进一步改进，所述金属层设置为铜箔、铝箔或银箔。
作为本实用新型的进一步改进，所述金属层表面设置有导电防锈涂层。
作为本实用新型的进一步改进，所述弹性导电层设置为具有稀疏孔隙的材料，当在所述金属层表面施加压力时，所述弹性导电层的厚度减小。
作为本实用新型的进一步改进，所述弹性导电层的材料设置为导电布或导电泡棉。
为实现上述实用新型目的之一，本实用新型一实施例提供了一种光学装置，包括上述的电磁干扰屏蔽件，所述电磁干扰屏蔽件用于填充所述光学装置的缝隙。
与现有技术相比，本实用新型具有以下有益效果：该电磁干扰屏蔽件粘贴于待粘贴件后，第一胶层粘贴于待粘贴件上，当部分第一胶层受挤压或融化出现流动的趋势时，由于金属层面积大于第一胶层，且金属层完全覆盖第一胶层，所以第一胶层不会溢出至金属层外侧，避免了第一胶层与金属层以外的其他结构部件粘接，继而保护了其他结构的正常运动。
图1是本实用新型一实施例的电磁干扰屏蔽件的结构示意图；
图2是本实用新型一实施例的电磁干扰屏蔽件的侧视图；
图3是本实用新型一实施例的从第二胶层方向观测电磁干扰屏蔽件的示意图；
图4是本实用新型一实施例的光学装置的结构示意图；
图5是本实用新型其一实施例的光模块的爆炸图；
图6是本实用新型一实施例的壳体、电磁干扰屏蔽件和拉环弹片的安装位置关系图；
其中，1000、光学装置；100、光模块；10、电磁干扰屏蔽件；101、空隙；11、金属层；12、第二胶层；13、弹性导电层；14、第一胶层；20、壳体；21、侧壁；22、导向槽；30、拉环组件；31、拉环弹片；200、插槽笼子；210、导电弹片。
以下将结合附图所示的具体实施方式对本实用新型进行详细描述。但这些实施方式并不限制本实用新型，本领域的普通技术人员根据这些实施方式所做出的结构、方法、或功能上的变换均包含在本实用新型的保护范围内。
应该理解，本文使用的例如“上”、“上方”、“下”、“下方”等表示空间相对位置的术语是出于便于说明的目的来描述如附图中所示的一个单元或特征相对于另一个单元或特征的关系。空间相对位置的术语可以旨在包括设备在使用或工作中除了图中所示方位以外的不同方位。
本实用新型一实施例提供一种电磁干扰屏蔽件及光学装置，电磁干扰屏蔽件如图1~3所示，光学装置如图4所示，电磁干扰屏蔽件在光学装置中的安装位置如图5和6所示，电磁干扰屏蔽件用于填充光学装置的缝隙，防止光学装置内的电磁波向外辐射。
本实施例的光学装置1000包括插槽笼子200和光模块100，插槽笼子200具有插接口，光模块100与插槽笼子200可插拔连接。在图4中，光模块100朝向插接口插入插槽笼子200内，光学装置1000还包括连接于插槽笼子200的导电弹片210，光模块100抵接于导电弹片210与其电接触连接。
为了便于理解和说明，在后文中，以光模块100的插拔方向定义出前后方向，并且，以光模块100的插入方向具体定义为“前”，以光模块100的拔出方向具体定义为“后”，同时，以与插拔方向以及竖直方向均相垂直的方向定义出左右方向，竖直方向定义出上下方向。
请参考图5，光模块100包括壳体20，拉环组件30和电磁干扰屏蔽件10。
其中，拉环组件30与壳体20活动连接，电磁干扰屏蔽件10设置于壳体20和拉环组件30之间。
更具体地，拉环组件30包括拉环弹片31，壳体20包括侧壁21、以及设置于侧壁21上的导向槽22，拉环弹片31设置于导向槽22内，电磁干扰屏蔽件10可以设置于侧壁21和拉环弹片31之间。
为了更清楚地说明电磁干扰屏蔽件10的具体连接方式，先对电磁干扰屏蔽件10的具体结构进行描述。
请参考图1-3，电磁干扰屏蔽件10包括金属层11、弹性导电层13和第一胶层14，金属层11电连接于弹性导电层13，弹性导电层13通过第一胶层14粘贴于待粘贴件。电磁干扰屏蔽件10还包括第二胶层12，金属层11通过第二胶层12粘贴于弹性导电层13，第一胶层14和第二胶层12的材料均设置为导电胶，结合金属层11的导电性、弹性导电层13的导电性，电磁干扰屏蔽件10的导电性使其具有优良的电磁屏蔽效果。
另外，金属层11也可以通过焊接、卡接等形式连接至弹性导电层13，保障金属层11与弹性导电层13之间的连接的可靠性和导电性。
弹性导电层13设置为具有稀疏孔隙的材料，当在金属层11表面施加压力时，弹性导电层13的厚度减小。也就是说，弹性导电层13可以被压缩，受到外力时其厚度减小，当外力撤除后，也可恢复至原厚度。
进一步地，拉环组件30与壳体20之间的距离可以产生变化，当拉环组件30与壳体20之间的距离存在减少的趋势时，弹性导电层13被压缩，弹性导电层13在自身弹力的作用下，弹性导电层13具有驱使拉环组件30远离壳体20的趋势。当外力撤除后，弹性导电层13恢复形变，使拉环组件30回到原来的位置。
弹性导电层13的材料设置为导电布或导电泡棉，具有蓬松的质地，满足弹性导电层13的弹性形变、以及形变后可恢复至原厚度的需求。
以及，金属层11可以设置为铜箔、铝箔或银箔等具有良好导电性的材料，金属层11远离弹性导电层13的一侧可以设置导电防锈涂层，一方面长期使用也能防止生锈，另一方面设置涂层后可以减小摩擦系数，使金属层11与外界的其他零件之间的相对滑动阻力更小。
金属层11为片状，在平行于金属层11所在的平面上：金属层11面积大于第一胶层14，且金属层11完全覆盖第一胶层14，参图1~3所示。由于金属层11的面积更大，且在垂直于金属层11所在平面的方向上，第一胶层14完全在金属层11的正投影的内部。当第一胶层14受到挤压、或者受热后具有流动的趋势时，扩张后的第一胶层14仍在金属层11的正投影内部。
另外，在平行于金属层11所在的平面上：弹性导电层13面积等于第一胶层14，且弹性导电层13完全覆盖第一胶层14。也就是说，弹性导电层13与第一胶层14粘接的位置，两者的形状一致、面积一致，这样可以使弹性导电层13与待粘贴物的表面粘贴得更加牢固不会松动，不会翘边。也就是说，金属层11的面积大于弹性导电层13，且金属层11完全覆盖弹性导电层13，如图1~3所示，这样在金属层11和弹性导电层13之间可以预留出空隙101，在该空隙101的位置可以容纳第一胶层14溢出的胶。
以及，结合上述的在金属层11和弹性导电层13之间以第二胶层12连接的实施例进行说明，在平行于金属层11所在的平面上：金属层11面积等于第二胶层12，且金属层11完全覆盖第二胶层12。在弹性导电层13通过第一胶层14粘贴于待粘贴物表面后，金属层11通过空隙101位置的第二胶层12与待粘贴物表面粘贴，以及部分溢出的第一胶层14也可以参与金属层11和待粘贴物表面的粘贴。
金属层11的边缘至与其相邻的弹性导电层13的边缘的距离不超过5毫米，实践中，可以是1mm左右，也就是图1~3中金属层11的边缘和弹性导电层13边缘之间的间距是1mm左右，该空隙101的长度足够容纳溢出的胶，又不会因空隙101过大使连接不牢固。
另外如图1~3、5、6所示，金属层11和弹性导电层13均设置为方形，弹性导电层13的长度，和/或，宽度小于金属层11。以及，弹性导电层13的中心点和金属层11的中心点均在第一延长线上，第一延长线垂直于金属层11所在的平面。
金属层11和弹性导电层13两者的中心位置相同，结构对称，也就是说，弹性导电层13的上下两侧空隙101宽度相同，前后两侧空隙101宽度相同，使胶不易从距离较小的一侧溢出至金属层11外侧。
下文从光模块100的角度说明电磁干扰屏蔽件10的安装，电磁干扰屏蔽件10的安装方式存在两种实施方式：
在其一实施例中，如图5所示，弹性导电层13通过第一胶层14粘贴于壳体20上，拉环组件30与金属层11相抵接。具体地，参图5中的电磁干扰屏蔽件10的空间位置以示出该实施例的安装方式，图5中的空隙101朝向壳体20、且远离拉环组件30，以示出电磁干扰屏蔽件10粘贴在壳体20上，金属层11与拉环组件30抵接。
在另一实施例中，弹性导电层13通过第一胶层14粘贴于拉环组件30、壳体20与金属层11相抵接，空隙101朝向拉环组件30、且远离壳体20，电磁干扰屏蔽件10粘贴在拉环组件30上，金属层11与壳体20抵接。
参图5所示的实施方式进一步地说明，拉环组件30包括拉环弹片31，壳体20包括侧壁21，电磁干扰屏蔽件10设置于侧壁21和拉环弹片31之间。
当拉环弹片31与壳体20之间的距离存在减少的趋势时，弹性导电层13具有驱使拉环弹片31远离壳体20的趋势，弹性导电层13增加了拉环弹片31的弹性，这样拉环弹片31可以与插槽笼子200上的导电弹片210更好的接触，避免了因为光模块100与插槽笼子200的缝隙过大，拉环弹片31未与导电弹片210接触导致的断路问题。
另外，拉环弹片31滑动连接于导向槽22内，在光模块100的外壳结构中壳体20与拉环组件30组装在一起后，拉动拉环组件30时，拉环弹片31可以在壳体20两侧的导向槽22内前后滑动。另外可以通过光模块100上的锁定结构进行锁定解锁，从而实现光模块100与插槽笼子200的安装和拆卸的功能。
以及，电磁干扰屏蔽件10与侧壁21或拉环弹片31相对光滑地接触，使得拉环组件30在前后滑动的过程中，一方面保持电磁干扰屏蔽件10始终抵持在侧壁21和拉环弹片31之间，另一方面又保障了拉环组件30的滑动顺畅。本实施例中，与侧壁21或拉环弹片31接触的是金属层31，金属层11的表面光滑，粗糙度低，使其可以与其他部件相对光滑地接触。
进一步地，金属层11设置为方形，拉环弹片31的宽度与金属层11的宽度相同，拉环弹片31的宽度和金属层11的宽度均是在上下方向上的厚度，电磁波的泄露，是从前向后的方式，经过光模块100和壳体20之间的缝隙向外扩散，所以在上下方向的填充，可以将缝隙完全填充，避免电磁波的泄露。
如图5所示，拉环组件30包括分别设置于壳体20左右两侧的拉环弹片31，左侧的拉环弹片31与壳体20之间、以及右侧的拉环弹片31与壳体20之间，均设置电磁干扰屏蔽件10。在左右两侧均设置电磁干扰屏蔽件10，使左侧的拉环弹片31具有向左运动的趋势，右侧的拉环弹片31具有向右运动的趋势，一方面两侧均可以充分填充，另一方面两侧受力均匀。
另外，一般地，由于装配公差的需求，光模块100和插槽笼子200之间本就预留有缝隙，所以直接在拉环组件30和壳体20直接设置电磁干扰屏蔽件10后，拉环弹片31会被部分的顶起，若电磁干扰屏蔽件10的厚度较薄，在该缝隙的范围内，所以可以在现有的光模块100的基础上增加该电磁干扰屏蔽件10，如图5所示。
若电磁干扰屏蔽件10的厚度较厚，可以在侧壁21表面设置凹槽，电磁干扰屏蔽件10部分嵌入凹槽内，避免光模块100无法插入插槽笼子200内，产生干涉的问题。
与现有技术相比，本实施例具有以下有益效果：
该电磁干扰屏蔽件10粘贴于待粘贴件后，第一胶层14粘贴于待粘贴件上，当部分第一胶层14受挤压或融化出现流动的趋势时，由于金属层11面积大于第一胶层14，且金属层11完全覆盖第一胶层14，所以第一胶层14不会溢出至金属层11外侧，避免了第一胶层14与金属层11以外的其他结构部件粘接，继而保护了其他结构的正常运动。
应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起见，本领域技术人员应当将说明书作为一个整体，各实施方式中的技术方案也可以经适当组合，形成本领域技术人员可以理解的其他实施方式。
上文所列出的一系列的详细说明仅仅是针对本实用新型的可行性实施方式的具体说明，它们并非用以限制本实用新型的保护范围，凡未脱离本实用新型技艺精神所作的等效实施方式或变更均应包含在本实用新型的保护范围之内。
Claims (9)
- 一种电磁干扰屏蔽件，其特征在于，包括依次层叠连接在一起的金属层、弹性导电层和第一胶层，所述弹性导电层通过所述第一胶层粘贴于待粘贴件；所述金属层为片状，在平行于所述金属层所在的平面上：所述金属层面积大于所述第一胶层的面积，且所述金属层完全覆盖所述第一胶层。
- 根据权利要求1所述的电磁干扰屏蔽件，其特征在于，在平行于所述金属层所在的平面上：所述弹性导电层面积等于所述第一胶层，且所述弹性导电层完全覆盖所述第一胶层。
- 根据权利要求1所述的电磁干扰屏蔽件，其特征在于，还包括第二胶层，所述金属层通过所述第二胶层粘贴于所述弹性导电层；在平行于所述金属层所在的平面上：所述金属层面积等于所述第二胶层，且所述金属层完全覆盖所述第二胶层。
- 根据权利要求3所述的电磁干扰屏蔽件，其特征在于，所述第一胶层和所述第二胶层的材料均设置为导电胶。
- 根据权利要求1所述的电磁干扰屏蔽件，其特征在于，所述金属层设置为铜箔、铝箔或银箔。
- 根据权利要求5所述的电磁干扰屏蔽件，其特征在于，所述金属层表面设置有导电防锈涂层。
- 根据权利要求1所述的电磁干扰屏蔽件，其特征在于，所述弹性导电层设置为具有稀疏孔隙的材料，当在所述金属层表面施加压力时，所述弹性导电层的厚度减小。
- 根据权利要求7所述的电磁干扰屏蔽件，其特征在于，所述弹性导电层的材料设置为导电布或导电泡棉。
- 一种光学装置，其特征在于，包括权利要求1所述的电磁干扰屏蔽件，所述电磁干扰屏蔽件用于填充所述光学装置的缝隙。
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