CN1359042A - Computer system and its anti-electromagnetic wave interference structure - Google Patents

Abstract

A computer system and an anti-electromagnetic interference structure thereof comprise a metal shell, a mainboard and a plurality of shielding metal sheets. Wherein, two sides of the inner side of the metal shell at least comprise a pair of guide grooves which are approximately parallel and used for accommodating the mainboard. The shielding metal sheet can be clamped on the grounding layer, and its side surface is formed with several spring sheets and elastic fastening latches, and the elastic fastening latches are fastened on the through holes, and when the main board is slided into the guide groove, the spring sheets can be tightly contacted with the guide groove.

Description

Computer system and its anti-electromagnetic wave interference structure

The present invention relates to a computer system and its anti-electromagnetic wave interference structure, in particular to a system that utilizes a plurality of shielding metal sheets to be engaged on the side of the main board of the computer system, and through the design of the inner guide groove of the metal shell and the parallel two sides of the main board. The side is plated with a ground layer to achieve a structure that prevents electromagnetic wave interference.

Many electronic products on the market, such as information products such as personal computers or Internet access computers, usually use a metal casing to cover the computer system motherboard. The purpose is not only to protect the internal electronic components, but also to reduce the electromagnetic waves generated by the electronic components. It has been proven that excessive electromagnetic waves generated by electronic products will cause significant damage to the human body, especially for electronic components with high operating frequency, the situation of electromagnetic waves is even more serious. Therefore, in many countries, various electronic products must pass certain safety standard tests before they can be used.

In the prior art, the motherboard in the metal casing is mostly locked on the inner side of the metal casing by screws, thereby reducing the potential difference between the ground potential of the motherboard and the potential of the metal casing, thereby reducing the potential difference between the ground potential of the motherboard and the metal casing. The electromagnetic wave released by the excessive potential difference of the potential, in addition, through the contact between the main board and the metal shell, the electromagnetic wave conduction area is enlarged to attenuate the energy concentrated by the electromagnetic wave.

FIG. 1 shows a computer system mainframe in the prior art. In order to clearly show the relationship between the motherboard and the metal casing, the upper cover of the metal casing is removed. The computer system host 10 has a main board 11 and a metal shell 13 covering the main board 11 . A plurality of through holes 15 formed on the main board 11 enable the screws 12 to lock the main board 11 to one side of the metal shell 13 . A layer of tin is soldered under the screw 12 and is in electrical contact with the ground layer 14 formed on the motherboard 11. Therefore, by reducing the potential difference between the motherboard ground potential and the metal casing potential, the difference between the motherboard ground potential and the metal casing potential is reduced. The electromagnetic wave released by the excessive potential difference expands the electromagnetic wave transmission area through the contact between the main board and the metal shell to attenuate the concentrated energy of the electromagnetic wave.

This case is aimed at the above-mentioned prior art, the main board needs to be locked by multiple screws, and the screws must tightly connect the main board and the metal casing, which makes its assembly very troublesome. In addition, since the main board is only locked by a plurality of screws, the gap between the main board and the metal casing increases, making it easier for electromagnetic waves to penetrate, thus causing more serious leakage of electromagnetic waves.

The object of the present invention is to provide a computer system and its anti-electromagnetic wave interference structure to solve the above problems.

The purpose of the present invention is achieved by providing a computer system and its anti-electromagnetic wave interference structure, including: a metal shell for covering the computer system and at least one inner side thereof has a guide groove; a main board, the A grounding layer is formed on the periphery of the motherboard, and the thickness of the motherboard is approximately equal to the distance between the aforementioned guide grooves, thereby fixing the motherboard in the aforementioned guide grooves; and a shielding metal sheet, the shielding metal sheet includes at least a pair of The slightly parallel metal plate and the metal side plate are connected to form a cuboid with an opening, and the shielding metal plate can be clamped on the ground layer of the main board, wherein on one of the metal plate or the metal side plate, a At least one shrapnel protrudes from the direction of the groove.

The present invention also provides a shielding metal sheet embedded on a main board to prevent electromagnetic wave interference of an electronic device, at least comprising: a pair of slightly parallel metal flat plates and metal side plates connected to form a cuboid with an opening, Wherein, at least one elastic piece protrudes outward toward the opening on one of the metal flat plate or the metal side plate and forms an elastic buckle inward toward the opening.

Furthermore, the computer system of the present invention includes: a metal casing, a motherboard and a plurality of shielding metal sheets. The two opposite insides of the metal case include at least a pair of slightly parallel guide grooves for accommodating the main board, so that the main board can be directly inserted into the guide grooves to simplify the assembly and combination of the main board and the metal case. In addition, in order to reduce the potential difference between the ground potential of the motherboard and the metal casing, and reduce the electromagnetic waves released due to the excessive potential difference between the ground potential of the motherboard and the metal casing, the parallel sides of the motherboard are plated with a ground layer , and through the shrapnel on the shielding metal sheet sandwiched on the grounding layer, the motherboard and the metal casing are in close contact through the shielding metal sheet, thereby reducing the potential difference between the motherboard grounding potential and the metal casing potential, that is, reducing the potential difference caused by the potential difference. Electromagnetic waves released by the large.

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

FIG. 1 is a perspective view of the connection between the motherboard and the metal casing of the computer system in the prior art, wherein the upper cover of the metal casing is removed to show the internal structure;

2 is an exploded perspective view of the motherboard, shielding metal sheet and metal casing of the computer system of the present invention, wherein part of the metal casing is removed to show the internal structure;

3a-3c are detailed views of the shielding metal sheet in FIG. 2, wherein FIG. 3a is a front perspective view, FIG. 3b is a rear perspective view, and FIG. 3c is a side sectional view.

FIG. 2 is an exploded perspective view of the motherboard, the shielding metal sheet and the metal casing of the computer system of the present invention. The computer system of the present invention can be an information product such as a personal computer or an Internet machine. As shown in FIG. 2 , the computer system at least includes: a motherboard 22 , a plurality of shielding metal sheets 23 embedded in the periphery of the motherboard 22 , and a metal shell 20 for covering the motherboard 22 . The metal shell 20 is stamped from a metal plate to form a roughly rectangular parallelepiped, and a guide groove 21 is formed on the inside of two opposite metal plates. The guide groove 21 is a pair of parallel ribs 211 with a distance equal to the thickness of the main board 22 , which is used to provide the main board 22 to be embedded and fixed so as to simplify the assembly method. And to strengthen the tight connection between the motherboard 22 and the guide groove 21 . Before the main board 22 is inserted into the guide groove 21 , a plurality of elastic shielding metal sheets 23 are installed on the two side edges of the main board 22 in the present invention. Since the thickness of the shielding metal sheet 23 is slightly greater than the interval of the convex ribs 211, when the motherboard 22 and the shielding metal sheet 23 are inserted into the guide groove 21, the shielding metal sheet 23 and the convex rib 211 produce an interference fit so that the motherboard 22 is firmly installed. Set in the metal casing 20.

With reference to Fig. 2 again, the structure of main board 22 is further described, main board 22 is formed on a printed circuit board with a plurality of electronic components and connectors, to achieve specific functions, this part is prior art, so in It will not be described in detail in this article. It is worth noting that tin plating layers are formed on both sides of the motherboard 22 as the grounding layer 221 . The ground layer 221 can be in electrical contact with the shielding metal sheet 23 so that the ground potential of the motherboard 22 is equal to the potential of the metal casing 20 . At the same time, a plurality of through holes 222 are formed at the position of the ground layer 221 for fixing the shielding metal sheet 23 .

3a-3c, which illustrate the detailed structure of the shielding metal sheet 23, wherein FIG. 3a is a front perspective view, FIG. 3b is a rear perspective view and FIG. 3c is a side sectional view. The shielding metal sheet 23 is formed by connecting a pair of slightly parallel metal flat plates 230 and metal side plates 231 to form a cuboid with an opening, and can be made of copper or aluminum with better conductivity, which is integrally formed by stamping. Each metal plate 230 or metal side plate 231 may include a plurality of elastic pieces 232 , and in this embodiment, the elastic latch 233 is only formed on one of the metal plates 230 . The elastic piece 232 and the elastic latch 233 are directly stamped on the shielding metal piece 23 . As shown in the figure, the elastic piece 232 and the elastic latch 233 can be punched out through the shape of the mold itself during manufacture, so there is no need for secondary processing, so the manufacturing cost can be reduced. Further referring to FIG. 3 c , the elastic piece 232 protrudes toward the outside of the metal plate 230 or the metal side plate 231 , so that the width of the shielding metal piece 23 is slightly larger than the distance between the guide grooves 21 . On the contrary, the elastic latch 233 is recessed toward the inner side of the metal plate 230 , so that the elastic latch 233 of the shielding metal sheet 23 can be inserted into the through hole 222 of the motherboard 22 .

When installing the main board 22 , first align the opening of the shielding metal sheet 23 with the ground layer 221 on the edge of the main board 22 and push it in. As shown in FIG. 3c, since the elastic latch 233 is recessed toward the inner side of the metal plate 230 to form a barb, the elastic latch 233 can be embedded in the through hole 222 of the motherboard 22, thereby fixing the shielding metal sheet 23 on On the motherboard 22. When the shielding metal sheet 23 is installed on the edge of the motherboard 22 and inserted into the guide groove 21, the elastic buckle 233 of the shielding metal sheet 23 is embedded in the through hole 222 and fixed on the motherboard 22, and the elastic piece 232 of the shielding metal sheet 23 is The guide groove 21 is compressed and deformed so that the motherboard 22 is held in the guide groove 21 . Therefore, the present invention can ensure that the shielding metal sheet 23 does not lose contact with the guide groove 21 due to the shaking of the main board 22 , thereby accomplishing the purpose of fixing the main board 22 and effectively achieving a tight connection between the main board 22 and the metal casing 20 . In addition, according to the above-mentioned invention, it can directly buckle and lock the shielding metal sheet 23 on both sides of the main board 22, and then slide the main board 22 directly into the guide groove 21 of the metal shell 20, that is, complete the connection between the main board and the metal shell. The assembly of the shell meets the requirement of anti-electromagnetic wave interference, which effectively simplifies the assembly of the main board and the metal shell in the prior art.

In summary, although the present invention has been disclosed in combination with the above preferred embodiment, it is not intended to limit the present invention. Those skilled in the art can make various modifications and changes without departing from the spirit and scope of the present invention. Modifications, such as elastic latches 233 can also be formed on the bottom side of the metal plate 230 or guide grooves can be formed on the inner side of the adjacent metal shell. Therefore, the protection scope of the present invention should be defined by the claims.

Claims (10)

1. computer system and structure for preventing electromagnetic wave interference thereof comprise:

One metal shell is in order to coat this computer system and its at least one inboard has a guide groove;

The thickness that one motherboard, this motherboard periphery form a ground plane and this motherboard is suitable with the interval of aforementioned guide groove approximately, thus this motherboard is fixed in the aforementioned guide groove; And

One shielded metal sheet, this shielded metal sheet comprises at least by a pair of parallel metal plate and the metal side plate of slightly being and is connected to form a rectangular parallelepiped with opening, this shielded metal sheet can be clamped on the ground plane of this motherboard, wherein on one of this metal plate or metal side plate, establish at least one shell fragment towards this guide groove direction is prominent.

2. a kind of computer system as claimed in claim 1 and structure for preventing electromagnetic wave interference thereof, wherein this shielded metal sheet can be a copper sheet and forms through stamped.

3. a kind of computer system as claimed in claim 1 and structure for preventing electromagnetic wave interference thereof, wherein this ground plane is made by directly plating one deck tin on this motherboard.

4. a kind of computer system as claimed in claim 1 and structure for preventing electromagnetic wave interference thereof, wherein this shell fragment is through stamped and integrally formed with this shielded metal sheet.

5. a kind of computer system as claimed in claim 1 and structure for preventing electromagnetic wave interference thereof, wherein the ground plane at this motherboard also forms a plurality of through holes.

6. a kind of computer system as claimed in claim 5 and structure for preventing electromagnetic wave interference thereof, wherein this shielded metal sheet also forms a plurality of elasticity snaps on the plane with respect to the through hole of this motherboard, and its direction is towards this through hole.

7. a kind of computer system as claimed in claim 1 and structure for preventing electromagnetic wave interference thereof, wherein this elasticity snap is through stamped and integrally formed with this shielded metal sheet.

8. shielded metal sheet, be embedded at the Electromagnetic Interference that is used to prevent an electronic installation on the motherboard, at least comprise: a pair of parallel metal plate and the metal side plate of slightly being is connected to form a rectangular parallelepiped with opening, wherein establishes at least one shell fragment and inwardly forms an elasticity snap towards this opening to evagination towards this opening on one of this metal plate or metal side plate.

9. a kind of shielded metal sheet as claimed in claim 8, wherein this shell fragment and this elasticity snap are through stamped and integrally formed with this shielded metal sheet.

10. a kind of shielded metal sheet as claimed in claim 8, wherein this motherboard periphery forms a ground plane, and has a plurality of through holes, and it is in order to be electrically connected with aforementioned elasticity snap.

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