CN112020295A - Installation structure and installation method of wire mesh electromagnetic shielding optical window - Google Patents

Installation structure and installation method of wire mesh electromagnetic shielding optical window Download PDF

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Publication number
CN112020295A
CN112020295A CN202011001006.2A CN202011001006A CN112020295A CN 112020295 A CN112020295 A CN 112020295A CN 202011001006 A CN202011001006 A CN 202011001006A CN 112020295 A CN112020295 A CN 112020295A
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CN
China
Prior art keywords
wire mesh
electromagnetic shielding
optical window
shielding optical
pressing ring
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CN202011001006.2A
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Chinese (zh)
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CN112020295B (en
Inventor
何宴
杨林
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Sichuan Jiuzhou Electric Group Co Ltd
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Sichuan Jiuzhou Electric Group Co Ltd
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073Shielding materials
    • H05K9/0081Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/009Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive fibres, e.g. metal fibres, carbon fibres, metallised textile fibres, electro-conductive mesh, woven, non-woven mat, fleece, cross-linked
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • H05K9/0007Casings
    • H05K9/0015Gaskets or seals

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

The invention discloses a mounting structure and a mounting method of a wire mesh electromagnetic shielding optical window, wherein the mounting structure comprises the wire mesh electromagnetic shielding optical window, a lens base, upper conductive rubber, lower conductive rubber and a first pressing ring, the lens base is provided with a first step and a second step, the wire mesh electromagnetic shielding optical window is arranged on the first step, and a wire mesh in the wire mesh electromagnetic shielding optical window is exposed out of the wire mesh electromagnetic shielding optical window; the upper conductive rubber and the lower conductive rubber are respectively arranged above and below the metal wire mesh; the first pressing ring is arranged on the upper conductive rubber and fixedly connected with the lens base. The invention aims to provide a mounting structure and a mounting method of a wire mesh electromagnetic shielding optical window, wherein the mounting structure can effectively improve the anti-electromagnetic interference capability of photoelectric detection equipment, and vapor and salt mist in the environment are prevented from permeating into the equipment and damaging the equipment through airtight design, so that the environmental adaptability of the photoelectric detection equipment is improved.

Description

Installation structure and installation method of wire mesh electromagnetic shielding optical window
Technical Field
The invention relates to the technical field of wire mesh electromagnetic shielding optical windows, in particular to a mounting structure and a mounting method of a wire mesh electromagnetic shielding optical window.
Background
Under some complex electromagnetic environment conditions, in order to ensure that the photoelectric detection equipment normally works, inhibit external radiation interference and improve the anti-interference capability of a system, good electromagnetic shielding design must be carried out on the photoelectric detection equipment. The wire mesh light shielding window has good electromagnetic shielding performance and is widely applied. The principle of the wire mesh shielding optical window is that a layer of wire mesh is clamped between two layers of optical transparent parts, and the wire mesh is electrically connected with a metal shell of the photoelectric equipment, so that the electromagnetic shielding of the optical window is realized.
In order to realize the protection performance of photoelectric detection equipment and improve the environmental suitability of the photoelectric detection equipment, the airtight requirement is often provided for the photoelectric detection equipment, and the installation mode of the currently commonly adopted wire mesh optical window often adopts the following mode:
(1) the copper foil and other metals coat the periphery of the optical window, so that external electromagnetic radiation is prevented from entering the equipment through peripheral gaps;
(2) the wire mesh of the optical window is pressed directly onto the device housing with a press ring.
In the installation of two kinds of modes above, wire mesh, copper foil and the clamping ring that is used for compressing tightly wire mesh all have great rigidity, have clearance and great contact resistance all the time, influence shielding effect, also can't satisfy photoelectric detection equipment's airtight requirement, and in mode (2), if when the application of force is great in the installation, often still can damage wire mesh, further reduce shielding performance.
Disclosure of Invention
The invention aims to provide a mounting structure and a mounting method of a wire mesh electromagnetic shielding optical window, the mounting structure can effectively improve the anti-electromagnetic interference capability of photoelectric detection equipment, and vapor and salt mist in the environment are prevented from permeating into the equipment and damaging the equipment through airtight design, so that the environmental adaptability of the photoelectric detection equipment is improved, the practicability is high, and the popularization is easy.
The invention is realized by the following technical scheme:
a mounting structure of a wire mesh electromagnetic shielding optical window comprises the wire mesh electromagnetic shielding optical window, and further comprises a mirror base, conductive rubber and a first pressing ring, wherein a first step and a second step are sequentially arranged on the mirror base from bottom to top;
the conductive rubber comprises an upper conductive rubber and a lower conductive rubber, the upper conductive rubber and the lower conductive rubber are respectively arranged above and below the exposed metal wire mesh, and the lower conductive rubber is abutted to the second step; the first pressing ring is arranged on the upper conductive rubber and fixedly connected with the lens base.
Preferably, the first pressing ring is in threaded connection with the mirror base.
Preferably, the lens seat further comprises a sealant, wherein the sealant is injected from the glue injection hole of the lens seat, and the injected sealant is positioned between the wire mesh electromagnetic shielding optical window and the lens seat, between the wire mesh electromagnetic shielding optical window and the conductive rubber, and between the wire mesh electromagnetic shielding optical window and the first pressing ring.
Preferably, still include the second clamping ring, the microscope base still is provided with the third step, the one end of second clamping ring set up in on the third step, the other end of second clamping ring set up in on the wire mesh electromagnetic shield optical window, just the second clamping ring with microscope base fixed connection.
Preferably, the second pressing ring is in threaded connection with the mirror base.
Preferably, the optical window further comprises a rubber gasket, and the rubber gasket is arranged between the metal wire mesh electromagnetic shielding optical window and the second pressing ring.
Preferably, the endoscope further comprises an equipment shell, and the equipment shell is fixedly connected with the microscope base.
Preferably, the endoscope further comprises a sealing ring, and the sealing ring is arranged at the joint of the equipment shell and the microscope base.
A method for installing an installation structure of a wire mesh electromagnetic shielding optical window comprises the following steps:
s1: disposing the lower conductive rubber on the second step;
s2: arranging the wire mesh electromagnetic shielding optical window on the first step, and enabling the exposed wire mesh to be positioned above the lower conductive rubber;
s3: sequentially arranging the upper conductive rubber and the first pressing ring on the exposed metal wire mesh, and fixedly connecting the first pressing ring with the mirror base;
s4: injecting the sealant along the glue injection hole of the lens base;
s5: placing the rubber pad above the metal wire mesh electromagnetic shielding optical window, arranging the second pressing ring on the rubber pad and the third step, and fixedly connecting the second pressing ring with the lens base;
s6: a sealing ring is arranged at the joint of the equipment shell and the microscope base;
s7: fixedly connecting the equipment shell with the microscope base
Preferably, the first pressing ring is in threaded connection with the mirror base or the second pressing ring is in threaded connection with the mirror base.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. conductive rubber is arranged; the conductive rubber has flexibility, so that the metal wire mesh is protected; meanwhile, gaps between the metal wire mesh and the lens base and between the metal wire mesh and the first pressing ring are eliminated, so that good electric connection is realized, and a good electromagnetic shielding effect is achieved;
2. a gap is reserved between the metal wire mesh electromagnetic shielding optical window and the lens base and between the metal wire mesh electromagnetic shielding optical window and the first pressing ring, sealant is injected into the gap through a glue injection hole in the lens base for filling, so that an airtight effect is achieved, and meanwhile, the sealant plays a role in fixing the optical window after being cured;
3. the second pressing ring and the metal wire mesh electromagnetic shielding optical window are separated by a rubber gasket, so that stress concentration is prevented when the second pressing ring is screwed, and the metal wire mesh electromagnetic shielding optical window is prevented from being damaged;
4. and a sealing ring is arranged between the lens base and the equipment shell, so that an airtight effect is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a partial schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of a cross-section of the present invention;
reference numbers and corresponding part names in the drawings:
1. a lens base; 2. a conductive rubber; 3. a first clamping ring; 4. a wire mesh; 5. sealing glue; 6. injecting glue holes; 7. a second clamping ring; 8. a rubber pad; 9. an equipment housing; 10. a seal ring; 11. an upper optically transparent member; 12. a lower optically transparent member.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
A mounting structure of a wire mesh electromagnetic shielding optical window, as shown in fig. 1 and 2, comprises a wire mesh electromagnetic shielding optical window, a lens holder 1, an upper conductive rubber 2, a lower conductive rubber 2 and a first clamping ring 3. The wire mesh electromagnetic shielding optical window comprises an upper optical transparent part 11 and a lower optical transparent part 12, a layer of wire mesh 4 is arranged between the upper optical transparent part 11 and the lower optical transparent part 12, and the end face of the wire mesh 4 is exposed out of the upper optical transparent part 11 and the lower optical transparent part 12.
In this embodiment, the lens base 1 is annular, and the inner sidewall of the lens base 1 is sequentially provided with a first step and a second step from bottom to top, wherein the height of the first step is lower than the height of the upper optical transparent member 11, so that when the upper optical transparent member 11 is placed on the first step, the wire mesh 4 exposed on the upper optical transparent member 11 and the lower optical transparent member 12 can be located above the second step and has a certain distance from the second step.
The upper conductive rubber 2 and the lower conductive rubber 2 are respectively placed above and below the exposed wire mesh 4, and the lower conductive rubber 2 is simultaneously in contact with the second step and the wire mesh 4, thereby achieving electrical connection. The first pressing ring 3 is arranged above the upper conductive rubber 2 and is in threaded connection with the mirror base 1. Specifically, the side wall of the second step is provided with a thread a, the contact surface of the first pressing ring 3 and the second step is provided with a thread B, and the thread a is in fit connection with the thread B, so that the upper conductive rubber 2 and the lower conductive rubber 2 clamp the wire mesh 4 and tightly contact the lens base 1. Since the upper conductive rubber 2 and the lower conductive rubber 2 have flexibility, the wire net 4 can be protected; meanwhile, gaps between the metal wire mesh 4 and the lens base 1 and between the metal wire mesh 4 and the first pressing ring 3 can be eliminated, and good electric connection is realized, so that a good electromagnetic shielding effect is achieved.
Further, the air tightness of the whole structure is affected by the gaps between the lower optical transparent member 12 and the lens holder 1 and between the upper optical transparent member 11 and the first pressing ring 3. Therefore, in the present embodiment, the sealant 5 is injected through the sealant injection hole 6 on the lens base 1 to fill, so as to perform the air-tight function on one hand, and on the other hand, the sealant 5 can perform the fixing function on the upper optical transparent member 11 and the lower optical transparent member 12 after being cured.
Further, in this embodiment, the lens module further includes a second pressing ring 7, where the second pressing ring 7 is disposed above the upper optical transparent member 11 and is fixedly connected to the lens base 1, so as to further fix the wire mesh electromagnetic shielding optical window, and prevent the wire mesh electromagnetic shielding optical window from falling off from the lens base 1, which affects the use.
Specifically, still be provided with the third step on the mirror base 1, the third step is located the top of second step, and the lateral wall of third step is provided with screw thread C, and the lateral wall of second clamping ring 7 and the contact of third step is equipped with screw thread D, and screw thread C is connected with screw thread D cooperation to make second clamping ring 7 fix on mirror base 1.
Preferably, a rubber pad 8 is added on the contact surface of the second pressing ring 7 and the upper optical transparent member 11, so that when the second pressing ring 7 is fixed, the stress concentration of the second pressing ring 7 on the upper optical transparent member 11 is prevented, and the wire mesh electromagnetic shielding optical window is prevented from being damaged.
It should be noted that, when the second pressing ring 7 is screwed with the lens holder 1, the force applied by screwing the second pressing ring 7 should be moderate and not too large, so as to prevent the strain of the wire mesh electromagnetic shielding optical window from affecting the performance of the photoelectric detection device.
Further, in this embodiment, in order to fix the mirror base 1 and the device housing 9, a part of the area of the outer side wall of the mirror base 1 is cut off, and the cut-off area can be designed according to the size of the device housing 9 as long as the mirror base 1 and the device housing 9 can be stably fixed. In order to ensure the air tightness of the whole structure, a sealing ring 10 can be arranged at the joint of the microscope base 1 and the equipment shell 9 to play an air tightness role. The device has the advantages that water vapor and salt mist in the environment are prevented from permeating into the device to damage the device, so that the environmental adaptability of the photoelectric detection device is improved, the practicability is high, and the popularization is easy.
A method for installing an installation structure of a wire mesh electromagnetic shielding optical window comprises the following steps:
s1: arranging the lower conductive rubber 2 on the second step;
s2: arranging a wire mesh electromagnetic shielding light window on the first step, and enabling the exposed wire mesh 4 to be positioned above the lower conductive rubber 2;
s3: sequentially arranging an upper conductive rubber 2 and a first pressing ring 3 on the exposed metal wire mesh 4, and fixedly connecting the first pressing ring 3 with the lens base 1;
s4: injecting sealant 5 along the glue injection hole 6 of the lens base 1;
s5: a rubber pad 8 is arranged above the wire mesh electromagnetic shielding optical window, a second pressing ring 7 is arranged on the rubber pad 8 and the third step, and the second pressing ring 7 is fixedly connected with the lens base 1;
s6: a sealing ring 10 is arranged at the joint of the equipment shell 9 and the microscope base 1;
s7: fixedly connecting the equipment shell 9 with the microscope base 1
Preferably, the first clamping ring 3 is screwed to the mirror base 1 or the second clamping ring 7 is screwed to the mirror base 1.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. The mounting structure of the metal wire mesh electromagnetic shielding optical window comprises the metal wire mesh electromagnetic shielding optical window, and is characterized by further comprising a lens base (1), conductive rubber (2) and a first pressing ring (3), wherein the lens base (1) is sequentially provided with a first step and a second step from bottom to top, the metal wire mesh electromagnetic shielding optical window is arranged on the first step, and a metal wire mesh (4) in the metal wire mesh electromagnetic shielding optical window is exposed out of the metal wire mesh electromagnetic shielding optical window;
the conductive rubber (2) comprises an upper conductive rubber (2) and a lower conductive rubber (2), the upper conductive rubber (2) and the lower conductive rubber (2) are respectively arranged above and below the exposed wire mesh (4), and the lower conductive rubber (2) is abutted to the second step; the first pressing ring (3) is arranged on the upper conductive rubber (2), and the first pressing ring (3) is fixedly connected with the mirror base (1).
2. A mounting structure of a wire mesh electromagnetic shielding optical window according to claim 1, wherein the first pressing ring (3) is screwed with the lens holder (1).
3. The mounting structure of the wire mesh electromagnetic shielding optical window according to claim 1 or 2, further comprising a sealant (5), wherein the sealant (5) is injected from the glue injection hole (6) of the lens holder (1), and the injected sealant (5) is located between the wire mesh electromagnetic shielding optical window and the lens holder (1), between the wire mesh electromagnetic shielding optical window and the conductive rubber (2), and between the wire mesh electromagnetic shielding optical window and the first pressing ring (3).
4. The mounting structure of the wire mesh electromagnetic shielding optical window according to claim 3, further comprising a second pressing ring (7), wherein the lens holder (1) is further provided with a third step, one end of the second pressing ring (7) is disposed on the third step, the other end of the second pressing ring (7) is disposed on the wire mesh electromagnetic shielding optical window, and the second pressing ring (7) is fixedly connected with the lens holder (1).
5. A mounting structure of a wire mesh electromagnetic shielding optical window according to claim 4, wherein the second pressing ring (7) is screwed with the lens holder (1).
6. The mounting structure of the wire mesh electromagnetic shielding optical window according to claim 5, further comprising a rubber gasket (8), wherein the rubber gasket (8) is disposed between the wire mesh electromagnetic shielding optical window and the second pressing ring (7).
7. A mounting structure of a wire mesh electromagnetic shielding optical window according to claim 6, further comprising an equipment housing (9), wherein the equipment housing (9) is fixedly connected with the mirror base (1).
8. The mounting structure of the wire mesh electromagnetic shielding optical window according to claim 7, further comprising a sealing ring (10), wherein the sealing ring (10) is disposed at a joint of the device housing (9) and the mirror base (1).
9. A method of mounting a mounting structure for a wire mesh electromagnetic shielding optical window according to claim 8, comprising the steps of:
s1: arranging the lower conductive rubber (2) on the second step;
s2: arranging the wire mesh electromagnetic shielding light window on the first step, and enabling the exposed wire mesh (4) to be positioned above the lower conductive rubber (2);
s3: the upper conductive rubber (2) and the first pressing ring (3) are sequentially arranged on the exposed metal wire mesh (4), and the first pressing ring (3) is fixedly connected with the lens base (1);
s4: injecting the sealant (5) along the glue injection hole (6) of the lens base (1);
s5: the rubber pad (8) is placed above the wire mesh electromagnetic shielding optical window, the second pressing ring (7) is arranged on the rubber pad (8) and the third step, and the second pressing ring (7) is fixedly connected with the lens base (1);
s6: a sealing ring (10) is arranged at the joint of the equipment shell (9) and the microscope base (1);
s7: fixedly connecting the equipment shell (9) with the microscope base (1).
10. The method of claim 9, wherein the first pressing ring (3) is screwed to the mirror base (1) or the second pressing ring (7) is screwed to the mirror base (1).
CN202011001006.2A 2020-09-22 2020-09-22 Installation structure and installation method of wire mesh electromagnetic shielding optical window Active CN112020295B (en)

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CN202011001006.2A CN112020295B (en) 2020-09-22 2020-09-22 Installation structure and installation method of wire mesh electromagnetic shielding optical window

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Application Number Priority Date Filing Date Title
CN202011001006.2A CN112020295B (en) 2020-09-22 2020-09-22 Installation structure and installation method of wire mesh electromagnetic shielding optical window

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CN112020295B CN112020295B (en) 2021-05-14

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000204855A (en) * 1999-01-11 2000-07-25 Kajima Corp Electromagnetic shielding glass window
CN203085097U (en) * 2013-01-17 2013-07-24 深圳市赛盛技术有限公司 Liquid crystal display
CN204157214U (en) * 2014-10-13 2015-02-11 内蒙古第一机械集团有限公司 There is the photoelectric device panel ruggedized construction of electromagnetic shielding and sealing function
CN204392770U (en) * 2015-03-12 2015-06-10 陕西理工学院 A kind of shielding construction for display screen
CN106028771A (en) * 2016-06-30 2016-10-12 山东超越数控电子有限公司 Shielding glass and installing method thereof
CN209845640U (en) * 2019-04-22 2019-12-24 山东超越数控电子股份有限公司 Electromagnetic shielding device for reinforcing notebook computer display screen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000204855A (en) * 1999-01-11 2000-07-25 Kajima Corp Electromagnetic shielding glass window
CN203085097U (en) * 2013-01-17 2013-07-24 深圳市赛盛技术有限公司 Liquid crystal display
CN204157214U (en) * 2014-10-13 2015-02-11 内蒙古第一机械集团有限公司 There is the photoelectric device panel ruggedized construction of electromagnetic shielding and sealing function
CN204392770U (en) * 2015-03-12 2015-06-10 陕西理工学院 A kind of shielding construction for display screen
CN106028771A (en) * 2016-06-30 2016-10-12 山东超越数控电子有限公司 Shielding glass and installing method thereof
CN209845640U (en) * 2019-04-22 2019-12-24 山东超越数控电子股份有限公司 Electromagnetic shielding device for reinforcing notebook computer display screen

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