CN214507781U - Electromagnetic shielding device and electronic equipment - Google Patents
Electromagnetic shielding device and electronic equipment Download PDFInfo
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- CN214507781U CN214507781U CN202120839598.9U CN202120839598U CN214507781U CN 214507781 U CN214507781 U CN 214507781U CN 202120839598 U CN202120839598 U CN 202120839598U CN 214507781 U CN214507781 U CN 214507781U
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Abstract
The application discloses electromagnetic shield device and electronic equipment, wherein, electromagnetic shield device includes: one side surface of the metal radiating plate is used for being attached to one side surface of the chip far away from the circuit board; a fastener for fastening the metal heat dissipation plate to a circuit board; the metal leads to the piece, and the metal leads to the piece and is two at least, forms the space that is used for holding the chip between each metal leads to the piece, and the one end of every metal leads to the piece and contacts with the metal cooling plate, and the other end of every metal leads to the piece is used for contacting with the ground connection part of circuit board. The heat of the chip is transferred to the metal cooling plate and then is dissipated, the periphery of the chip is not completely sealed like the existing shielding cover, the periphery of the chip is smooth, air convection is good, and the heat dissipation effect is good. In addition, the metal heat dissipation plate, the metal conducting piece, the grounding part of the circuit board and the ground plane of the circuit board form a loop, and the chip is surrounded by the loop, so that the problem of electromagnetic compatibility is avoided.
Description
Technical Field
The utility model relates to an electronic equipment technical field, in particular to electromagnetic shielding device. The utility model discloses still relate to an electronic equipment who contains this electromagnetic shield device.
Background
Electronic products generally have EMC (Electro Magnetic Compatibility, chinese name electromagnetic Compatibility) mandatory certification requirements, and chips of electronic devices operate at high frequency, which easily causes a problem that the electromagnetic Compatibility does not meet the certification. Therefore, in order to solve the problem of electromagnetic compatibility, a shielding can is generally covered outside the chip, the whole chip is covered by the shielding can, and the bottom of the shielding can is connected with a grounding copper sheet of a circuit board of an electronic product.
However, when a chip in an electronic device works, heat is generated, and the closed cavity of the shielding case hinders the rapid heat dissipation of the chip.
SUMMERY OF THE UTILITY MODEL
In view of this, an object of the present invention is to provide an electromagnetic shielding device to satisfy the requirement of electromagnetic compatibility and improve the heat dissipation effect.
Another object of the present invention is to provide an electronic device including the electromagnetic shielding apparatus, so as to satisfy the requirement of electromagnetic compatibility and improve the heat dissipation effect.
In order to achieve the above purpose, the utility model provides the following technical scheme:
an electromagnetic shielding device comprising:
the surface of one side of the metal radiating plate is used for being attached to the surface of one side, far away from the circuit board, of the chip;
a fastener for fastening the metal heat-radiating plate to the circuit board;
the metal conduction pieces are at least two, a space for accommodating the chip is formed between the metal conduction pieces, one end of each metal conduction piece is in contact with the metal heat dissipation plate, and the other end of each metal conduction piece is in contact with the grounding part of the circuit board.
Preferably, in the electromagnetic shielding apparatus, the metal conductor is sleeved outside the fastening member.
Preferably, in the above electromagnetic shielding apparatus, the metal via includes:
and two ends of the metal elastic piece are respectively contacted with the metal heat dissipation plate and the grounding part of the circuit board.
Preferably, in the electromagnetic shielding apparatus described above, the metal via further includes:
the metal ring platforms are respectively sleeved inside the two ends of the metal elastic part, the outer diameter of each metal ring platform is larger than that of the metal elastic part, and the two ends of the metal elastic part are respectively in contact with the metal heat dissipation plate and the grounding part of the circuit board through the metal ring platforms.
Preferably, in the electromagnetic shielding apparatus described above, the metal elastic member is a spring.
Preferably, in the electromagnetic shielding apparatus, the fastening member is a fastening member, and one end of the fastening member is used for being elastically fastened to the circuit board.
Preferably, in the electromagnetic shielding device, one end of the fastening member is an elastic umbrella structure for fastening to the circuit board, and the umbrella structure can elastically contract and expand to deform.
The utility model also provides an electronic equipment, including circuit board and chip, the chip install in the circuit board, its characterized in that still includes as above arbitrary any electromagnetic shield device.
Preferably, in the electronic device, a heat conductive silicone grease is filled between the metal heat dissipation plate of the electromagnetic shielding device and the chip.
Preferably, in the electronic device, the circuit board is provided with a fixing hole, and one end of the fastening member of the electromagnetic shielding device passes through and is fastened to the fixing hole.
Compared with the prior art, the beneficial effects of the utility model are that:
the electromagnetic shielding device provided by the utility model comprises a metal heat dissipation plate, a fastening piece and a metal conduction piece, wherein one side surface of the metal heat dissipation plate is used for being tightly attached to one side surface of the chip, which is far away from the circuit board; the fastener is used for fastening the metal heat dissipation plate to the circuit board; the chip is arranged in a space formed by the metal conduction pieces, one end of each metal conduction piece is in contact with the metal radiating plate, and the other end of each metal conduction piece is used for being in contact with the grounding part of the circuit board.
The side surface of the metal heat dissipation plate of the electromagnetic shielding device is attached to the side surface, far away from the circuit board, of the chip, the metal heat dissipation plate is fixed on the circuit board through the fastener, the heat of the chip is dissipated after being transferred to the metal heat dissipation plate, the periphery of the chip is not completely sealed like an existing shielding case, the periphery of the chip is smooth, air convection is good, the heat resistance of the metal heat dissipation plate is low, and under the condition that the space of an electronic product is allowed, the metal heat dissipation plate is of a plate-shaped structure, and the metal heat dissipation plate can be large in size, so that the electromagnetic shielding device has a good heat dissipation effect. In addition, because the grounding part of the circuit board is grounded, and two ends of the metal conducting piece are respectively contacted with the metal heat dissipation plate and the grounding part of the circuit board, the metal heat dissipation plate, the metal conducting piece, the grounding part of the circuit board and the ground plane of the circuit board form a loop, the chip is surrounded by the loop, the high frequency of the chip is limited in the loop, and the problem of electromagnetic compatibility cannot be caused. And the loop can shield electromagnetic interference generated outside, and the anti-interference performance of the chip is improved.
The utility model provides an electronic equipment has adopted the electromagnetic shield device in this application to dispel the heat and the electromagnetic shield to the chip, can have better radiating effect when satisfying electromagnetic compatibility.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an electromagnetic shielding apparatus according to an embodiment of the present invention;
fig. 2 is an exploded view of the electromagnetic shielding device of fig. 1;
fig. 3 is a schematic view of an installation structure of an electromagnetic shielding device according to an embodiment of the present invention;
fig. 4 is a schematic view of the electromagnetic shielding loop of the electromagnetic shielding device according to an embodiment of the present invention.
Wherein, 1 is a metal heat radiation plate, 2 is a fastening piece, 3 is a metal conduction piece, 31 is a metal elastic piece, 32 is a metal ring platform, 4 is a circuit board, 5 is a chip, and 6 is heat conduction silicone grease.
Detailed Description
The core of the utility model is to provide an electromagnetic shielding device, when having satisfied the electromagnetic compatibility requirement, have better radiating effect.
The utility model also provides an electronic equipment who contains this electromagnetic shield device has better radiating effect when having satisfied the electromagnetic compatibility requirement.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 4, an embodiment of the present invention provides an electromagnetic shielding device, which includes a metal heat dissipation plate 1, a fastening member 2 and a metal conduction member 3; the metal heat dissipation plate 1 is of a plate-shaped structure, and one side surface of the metal heat dissipation plate 1 is used for being attached to one side surface, far away from the circuit board 4, of the chip 5; the fastener 2 is used for fastening the metal heat-radiating plate 1 to the circuit board 4; the number of the metal conduction pieces 3 is at least two, a space for accommodating the chip 5 is formed between the metal conduction pieces 3, one end of each metal conduction piece 3 is in contact with the metal heat dissipation plate 1, and the other end of each metal conduction piece 3 is in contact with the grounding part of the circuit board 4.
When the electromagnetic shielding device is used, one side surface of the metal heat dissipation plate 1 is attached to one side surface of the chip 5 far away from the circuit board 4, the metal heat dissipation plate is fixed on the circuit board 4 through the fastener 2, the heat of the chip 5 is transferred to the metal heat dissipation plate 1 for heat dissipation, the periphery of the chip 5 is not completely sealed like the existing shielding case, the periphery of the chip 5 is smooth, air convection is good, the heat resistance of the metal heat dissipation plate 1 is low, under the condition that the space of an electronic product is allowed, the metal heat dissipation plate 1 is of a plate-shaped structure, and the metal heat dissipation plate can be large in size, so that the electromagnetic shielding device has a good heat dissipation effect. In addition, since the grounding portion of the circuit board 4 is grounded, and both ends of the metal conducting piece 3 contact the metal heat dissipation plate 1 and the grounding portion of the circuit board 4, respectively, as shown in fig. 3, the metal heat dissipation plate 1, one metal conducting piece 3, the grounding portion of the circuit board 4 and the ground plane of the circuit board 4 form a loop; as shown in fig. 4, the metal heat sink 1, the one metal via 3, the ground portion of the circuit board 4, the ground plane of the circuit board 4, the other metal via 3, and the metal heat sink 1 form another loop, the chip 5 is surrounded by the loop, the high frequency of the chip 5 is limited in the loop, and the problem of electromagnetic compatibility does not occur. And the loop can shield electromagnetic interference generated outside, and the anti-interference performance of the chip 5 is improved.
In addition, since the heat dissipation of the chip 5 can be realized only by the plate-shaped metal heat dissipation plate 1, compared with the conventional shielding case limited by the requirement of customizing the appearance of the chip, the metal heat dissipation plate 1 is not required to be customized, can be used universally, and has low manufacturing cost. And the metal heat dissipation plate 1 does not need to reserve a mounting position on the circuit board 4, so that the drawing board difficulty of the circuit board 4 is reduced.
The number of the metal conduction pieces 3 can be two, three, four or the like, and certainly, under the condition that the shielding use requirement is met, the number of the metal conduction pieces 3 is less and better, the cost is reduced, and the occupied space is reduced.
Further, in the present embodiment, the metal conduction member 3 is sleeved outside the fastening member 2. So set up, can reduce the space that the metal switched on piece 3 and occupy, only need with fastener 2 sharing a position can, and directly realize through fastener 2 that the metal switched on piece 3 is fixed with the contact between metal cooling plate 1 and the circuit board 4. Of course, the metal conductive member 3 may be separately fixed to other positions of the metal heat dissipation plate 1.
Preferably, the number of the fastening pieces 2 is the same as that of the metal conduction pieces 3, and one metal conduction piece 3 is sleeved outside each fastening piece 2. The number of the fasteners 2 and the metal lead-through 3 may be two, four or more. As long as the metal heat sink 1 can be fastened and can perform a shielding function.
The present embodiment is optimized for the metal conduction member 3, the metal conduction member 3 includes a metal elastic member 31, and both ends of the metal elastic member 31 are respectively in contact with the metal heat dissipation plate 1 and the ground portion of the circuit board 4. The purpose of the metal elastic member 31 is that, after the fastening member 2 fastens the metal heat sink 1 to the circuit board 4, the metal elastic member 31 is in a compressed state, so that two ends of the metal elastic member 31 are tightly abutted against the grounding portions of the metal heat sink 1 and the circuit board 4, and reliable conduction of the metal conductive member 3 is realized.
Preferably, the metal elastic member 31 is sleeved outside the fastening member 2, so that the space occupation of the metal elastic member is reduced, and the metal elastic member and the fastening member 2 only need to share one position. Of course, the metal elastic member 3 may be separately fixed to other positions of the metal heat dissipation plate 1.
Of course, the metal conductive member 3 may be a non-elastic member as long as the metal conductive member 3 can be in contact with the metal heat sink 1 and the ground portion of the circuit board 4 after the metal heat sink 1 is fastened.
Further, in this embodiment, the metal conducting member 3 further includes two metal ring platforms 32, the number of the metal ring platforms 32 is two, one metal ring platform 32 is respectively sleeved inside two ends of the metal elastic member 31, the outer diameter of the metal ring platform 32 is larger than the outer diameter of the metal elastic member 31, and two ends of the metal elastic member 31 are respectively contacted with the metal heat dissipation plate 1 and the grounding portion of the circuit board 4 through the metal ring platforms 32. The contact area with the metal heat sink 1 and the ground portion of the circuit board 4 is increased by the metal ring land 32, thereby further improving the reliability of contact conduction.
Preferably, in the present embodiment, the metal elastic member 31 is a spring, and the spring is sleeved outside the fastening member 2. Of course, the metal elastic member 31 may be a metal sleeve or the like that can be bent and deformed in the axial direction.
As shown in fig. 1 to fig. 3, in the present embodiment, the fastening member 2 is a clamping member, and one end of the clamping member is used for being elastically clamped to the circuit board 4. Specifically, one end of the clamping piece is of an elastic umbrella-shaped structure, the clamping piece can elastically contract and expand to deform, correspondingly, the metal heat dissipation plate 1 is provided with a mounting hole, the circuit board 4 is provided with a fixing hole, and the maximum expanding outer diameter of the umbrella-shaped structure is slightly larger than the inner diameter of the fixing hole. When the metal heat dissipation plate is used, one end of the umbrella-shaped structure of the clamping piece sequentially penetrates through the mounting hole of the metal heat dissipation plate 1 and the fixing hole of the circuit board 4, and the umbrella-shaped structure is elastically stretched and clamped on the end face of the fixing hole to play a role in clamping. Of course, the fastening member 2 may also be a threaded connecting member, such as a screw or a bolt, and accordingly, the circuit board 4 is provided with a threaded hole.
Further, in this embodiment, one end of the fastening member, which is far away from the umbrella-shaped structure, is provided with a positioning boss, which is capable of axially positioning the fastening member 2, and the outer diameter of the positioning boss is larger than the inner diameter of the mounting hole on the metal heat dissipation plate 1. When the fixing device is used, one end of the umbrella-shaped structure of the fixing piece sequentially penetrates through the mounting hole of the metal heat dissipation plate 1 and the fixing hole of the circuit board 4, the positioning boss is in contact positioning with the end face of the mounting hole, and the umbrella-shaped structure is elastically stretched and clamped on the end face of the fixing hole to play a role in fixing.
Further, in this embodiment, the fastening member is an insulating fastening member, specifically, a plastic fastening member or a rubber fastening member, so as to form a shielding loop better.
In this embodiment, the metal heat sink 1 is preferably an aluminum plate, which has low thermal resistance and low cost. Of course, the metal heat sink 1 may be a metal plate such as a copper plate or an iron plate.
Based on the described electromagnetic shield assembly of any preceding embodiment, the embodiment of the utility model provides an electronic equipment is still provided, including circuit board 4 and chip 5, chip 5 installs in circuit board 4, and electronic equipment still includes the electromagnetic shield assembly as described in any preceding embodiment. The metal heat radiation plate 1 of the electromagnetic shielding device is tightly attached to one side surface of the chip 5, which is far away from the circuit board 4, the metal heat radiation plate 1 is fixed on the circuit board 4 through the fastener 2, and two ends of the metal conducting piece 3 are respectively contacted with the metal heat radiation plate 1 and the grounding part of the circuit board 4.
Because the electronic equipment adopts the electromagnetic shielding device in the application, the electromagnetic compatibility requirement is met, and meanwhile, the chip 5 has a good heat dissipation effect.
Further, in the present embodiment, the heat conductive silicone grease 6 is filled between the metal heat sink 1 and the chip 5. When the metal heat dissipation plate 1 is attached to the surface of the chip 5, a small gap exists, so that the gap can be filled by coating a layer of heat conduction silicone grease 6 on the surface of the chip 5, which is far away from the circuit board 4, and the heat conduction and heat dissipation performance of the chip 5 is improved. Compared with the existing shielding case, the shielding case is usually made of a thin metal material and is easy to deform, and due to the fact that the surface of the chip is not smooth, gaps between the shielding case and the chip are not controllable and are usually large, so that an independent solid heat-conducting silica gel sheet needs to be customized and placed between the shielding case and the chip. And metal cooling plate 1 in this application presses on chip 5, and consequently the clearance is less between the two, need not the solid heat conduction silica gel piece of customization, scribble the heat conduction silicone grease 6 of a layer of liquid can, the cost is reduced.
Preferably, in this embodiment, the circuit board 4 is provided with a fixing hole, and one end of the fastening member 2 of the electromagnetic shielding device passes through and is fastened to the fixing hole.
Compared with the existing shielding case, the appearance of the shielding case needs to be similar to that of the chip, so that the installation position of the shielding case needs to be reserved on the circuit board 4, and the drawing board of the circuit board 4 is troublesome. And in this application, leave the fixed orifices on circuit board 4 can, reduced the degree of difficulty of drawing board.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An electromagnetic shielding device, comprising:
the metal heat dissipation plate (1), one side surface of the metal heat dissipation plate (1) is used for being attached to one side surface, far away from the circuit board (4), of the chip (5);
a fastener (2), the fastener (2) being used to fasten the metal heat dissipation plate (1) to the circuit board (4);
the number of the metal conducting pieces (3) is at least two, a space for accommodating the chip (5) is formed between the metal conducting pieces (3), one end of each metal conducting piece (3) is in contact with the metal heat dissipation plate (1), and the other end of each metal conducting piece (3) is in contact with the grounding part of the circuit board (4).
2. The electromagnetic shielding device according to claim 1, wherein the metal lead-through (3) is sleeved outside the fastening member (2).
3. Electromagnetic shielding device according to claim 1, characterized in that said metallic through-conductor (3) comprises:
and the two ends of the metal elastic piece (31) are respectively contacted with the metal heat dissipation plate (1) and the grounding part of the circuit board (4).
4. Electromagnetic shielding device according to claim 3, characterized in that said metallic via (3) further comprises:
the metal ring platform (32), the inside cover in both ends of metal elastic component (31) is established respectively metal ring platform (32), the external diameter of metal ring platform (32) is greater than the external diameter of metal elastic component (31), the both ends of metal elastic component (31) are respectively through metal ring platform (32) with metal cooling plate (1) with the ground connection part contact of circuit board (4).
5. Electromagnetic shielding device according to claim 3 or 4, characterized in that said metal elastic member (31) is a spring.
6. The electromagnetic shielding device according to claim 1, wherein the fastening member (2) is a clamping member, and one end of the clamping member is used for elastically clamping the circuit board (4).
7. The EMI shielding device as claimed in claim 6, wherein one end of said clamping member is an umbrella structure having elasticity for clamping to said circuit board (4), said umbrella structure being capable of elastic contraction and expansion deformation.
8. An electronic device comprising a circuit board (4) and a chip (5), said chip (5) being mounted to said circuit board (4), characterized in that it further comprises an electromagnetic shielding device according to any one of claims 1-7.
9. The electronic device according to claim 8, wherein a heat conductive silicone grease (6) is filled between the metal heat dissipation plate (1) of the electromagnetic shielding device and the chip (5).
10. The electronic device according to claim 8, wherein the circuit board (4) is provided with a fixing hole, and one end of the fastening member (2) of the electromagnetic shielding device passes through and is fastened to the fixing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120839598.9U CN214507781U (en) | 2021-04-22 | 2021-04-22 | Electromagnetic shielding device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120839598.9U CN214507781U (en) | 2021-04-22 | 2021-04-22 | Electromagnetic shielding device and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214507781U true CN214507781U (en) | 2021-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120839598.9U Active CN214507781U (en) | 2021-04-22 | 2021-04-22 | Electromagnetic shielding device and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214507781U (en) |
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2021
- 2021-04-22 CN CN202120839598.9U patent/CN214507781U/en active Active
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