CN113133293A

CN113133293A - Floating shielding mechanism and circuit board module

Info

Publication number: CN113133293A
Application number: CN202010042813.2A
Authority: CN
Inventors: 赖志明; 高永顺; 黄梓翔
Original assignee: Giga Byte Technology Co Ltd
Current assignee: Giga Byte Technology Co Ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2021-07-16
Anticipated expiration: 2040-01-15
Also published as: CN113133293B

Abstract

A floating type shielding mechanism comprises a cover body, a shielding sheet and a flexible conductor. The cover body is used for being fixed to a circuit board and covering a plurality of input and output ports of the circuit board. The shielding sheet is movably arranged on the cover body and a back plate and is provided with a plurality of openings which respectively correspond to the input and output ports. The flexible conductor member is compressibly raised from the inner surface of the shielding plate and is used for contacting the input and output ports. When the circuit board, the back plate and the floating type shielding mechanism are assembled into a case together, the input and output ports are exposed out of the case opening, and the flexible conductor part is used for being compressed to enable the shielding sheet to abut against the inner wall surface around the case opening.

Description

Floating shielding mechanism and circuit board module

Technical Field

The present invention relates to a shielding mechanism and a circuit board module, and more particularly, to a floating shielding mechanism and a circuit board module.

Background

At present, a considerable number of motherboards are integrated with the IO shielding mechanism, that is, the IO shielding mechanism is directly locked to the motherboard and then loaded into the chassis together. However, after the motherboard is locked into the chassis, the IO shielding mechanism may not be well overlapped with the chassis due to tolerance, which may cause a problem of poor electromagnetic shielding.

Disclosure of Invention

The present invention is directed to a floating type shielding mechanism, which is movable relative to a circuit board assembly to be able to be well overlapped to a chassis when being fixed to the chassis together with the circuit board assembly, thereby providing a good electromagnetic shielding effect.

In order to achieve the above object, the present invention provides a circuit board module having the above floating type shielding mechanism.

The invention relates to a floating type shielding mechanism which is used for being assembled on a circuit board assembly and assembled into a case together with the circuit board assembly, wherein the circuit board assembly comprises a circuit board and a back plate fixed to the bottom surface of the circuit board, the circuit board comprises a plurality of input and output ports positioned on the top surface, the case comprises a case opening, and the floating type shielding mechanism comprises a cover body, a shielding sheet and a flexible conductor piece. The cover body is used for being fixed to the circuit board, is located the top surface and covers the top of these input/output ports. The shielding sheet is movably arranged on the cover body and the back plate and is provided with a plurality of openings which respectively correspond to the input and output ports. The flexible conductor member is compressibly raised from the inner surface of the shielding plate and is used for contacting the input and output ports. When the circuit board assembly and the floating type shielding mechanism are assembled in the case together, the input/output ports are exposed out of the case opening, and the flexible conductor piece is used for being compressed to enable the shielding sheet to abut against the inner wall surface around the case opening.

In an embodiment of the invention, the shielding plate includes a main plate and a top plate connected to the main plate in a bending manner, the input and output ports are located on the main plate, one of the top plate and the cover facing each other is provided with a first protrusion, the other one of the top plate and the cover is provided with a first opening, and the first protrusion is movably disposed in the first opening along a moving direction.

In an embodiment of the invention, the first protrusion is integrally formed on the cover, and the first opening is a long hole, an elliptical hole or a circular hole.

In an embodiment of the invention, the shielding plate includes a main plate body and a bottom plate body connected to the main plate body in a bending manner, the input and output ports are located on the main plate body, the bottom plate body is located between the back plate and the circuit board, one of the positions of the bottom plate body and the back plate facing each other is provided with a second protruding portion, the other one of the positions of the bottom plate body and the back plate is provided with a second opening, and the second protruding portion is movably disposed in the second opening along the moving direction.

In an embodiment of the invention, the bottom plate has a screw hole, the second protrusion includes a nut, a boss and a body connected in sequence, the body of the second protrusion is screwed to the screw hole of the bottom plate, and the boss passes through the second opening on the back plate and abuts against the bottom plate.

In an embodiment of the invention, the second opening is a long hole or an elliptical hole, the size of the nut is larger than the width of the second opening, and the width and the length of the second opening are larger than the size of the boss.

In an embodiment of the invention, the second opening is a circular hole, a size of the nut is larger than a size of the second opening, and a size of the second opening is larger than a size of the boss.

In an embodiment of the invention, the flexible conductor is a conductive foam.

In an embodiment of the invention, the flexible conductor is a bent elastic sheet formed by folding a part of the shielding sheet.

The invention discloses a circuit board module which is used for being assembled in a case, wherein the case comprises a case opening positioned on a first wall and a case fixing hole positioned on a second wall, and the circuit board module comprises a circuit board, a back plate and a floating type shielding mechanism. The circuit board comprises a circuit board fixing hole and a plurality of input and output ports, wherein the circuit board fixing hole penetrates through the circuit board fixing hole, and the input and output ports are located on the top surface. The back plate is fixed to the bottom surface of the circuit board. The floating type shielding mechanism is configured on the circuit board and the back plate. When the circuit board, the back plate and the floating type shielding mechanism are assembled in the case together, the flexible conductor piece is compressed, so that the circuit board fixing hole is aligned with the case fixing hole, and the shielding sheet abuts against the inner wall surface around the opening of the case.

In view of the above, the floating type shielding mechanism of the present invention is configured to the cover body and the back plate movably through the shielding plate, and the flexible conductor member is configured to protrude from the inner surface of the shielding plate in a compressible manner.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

Fig. 1 is a schematic diagram of a circuit board module according to an embodiment of the invention.

Fig. 2 is a partial sectional view taken along line a-a of fig. 1.

Fig. 3 is a partial sectional view taken along line B-B of fig. 1.

Fig. 4A is an exploded view of the floating shield mechanism and the backplate of fig. 1.

FIG. 4B is a schematic view of a first opening of a floating shield mechanism according to another embodiment of the invention.

FIG. 4C is a schematic view of a second opening of a floating shield mechanism in accordance with another embodiment of the present invention.

Fig. 5-6 are top schematic views of the circuit board module of fig. 1 installed in a chassis.

Fig. 7 is a schematic partial cross-sectional view of a shield sheet according to another embodiment of the present invention.

Wherein, the reference numbers:

d1: direction of movement

d1, d2, L1, L2, L3, P, R1, R2: size of

1: circuit board module

2: circuit board assembly

10: circuit board

12: input/output port

14: circuit board fixing hole

16: the top surface

18: bottom surface

20: cabinet

23: first wall

24: case opening

25: second wall

26: case fixing hole

27: inner wall surface

30: back plate

32. 32 a: second opening

100: floating type shielding mechanism

110: cover body

112: first projecting part

120: shielding sheet

121: main sheet body

122: top sheet body

123: bottom sheet body

124: opening holes

125. 125 a: first opening

126: screw hole

127: abutting part

128: inner surface

140: second projecting part

142: nut cap

144: boss

146: spiral shell body

150. 150 a: flexible conductor

Detailed Description

The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:

fig. 1 is a schematic diagram of a circuit board module according to an embodiment of the invention. Referring to fig. 1, the circuit board module 1 of the present embodiment is used for being assembled into a chassis 20 (shown in fig. 5). The circuit board module 1 includes a circuit board assembly 2 and a floating type shielding mechanism 100. The circuit board assembly 2 includes a circuit board 10 and a back plate 30 fixed to the bottom surface 18 of the circuit board 10. The floating shield mechanism 100 is located on the top surface 16 of the circuit board 10.

Circuit board 10 includes a plurality of input/output ports 12 on a top surface 16. The floating shielding mechanism 100 is movably disposed on the circuit board 10 and the back plate 30 and covers the input/output ports 12 of the circuit board 10.

Compared to the situation that the shielding mechanism cannot be well abutted against the chassis after the shielding mechanism and the circuit board are assembled to the chassis together due to tolerance, in the embodiment, the floating shielding mechanism 100 can slightly move relative to the circuit board 10, so that the abutting portion 127 of the floating shielding mechanism 100 can abut against the chassis 20 after the floating shielding mechanism 100 is assembled to the chassis 20 together with the circuit board 10 and the back plate 30, thereby achieving a good electromagnetic shielding effect. This will be explained below.

Fig. 2 is a partial sectional view taken along line a-a of fig. 1. Fig. 3 is a partial sectional view taken along line B-B of fig. 1. Fig. 4A is an exploded view of the floating shield mechanism and the backplate of fig. 1.

Referring to fig. 2 to 4A, the floating type shielding mechanism 100 includes a housing 110, a shielding plate 120 and a flexible conductor 150. The cover 110 is disposed on the circuit board 10 and located on the top surface 16 of the circuit board 10, and covers the input/output ports 12.

The shielding plate 120 is movably disposed between the cover 110 and the back plate 30 along a moving direction D1. In detail, the shielding plate 120 includes a main body 121, a top body 122 and a bottom body 123 connected to the main body 121 in a bending manner, and a plurality of abutting portions 127 surrounding the main body 121.

The main body 121 of the shielding plate 120 has a plurality of openings 124, and the openings 124 respectively correspond to the input/output ports 12. The top sheet 122 and the bottom sheet 123 are respectively located at two opposite ends of the main sheet 121. The top panel 122 is adjacent to the shell 110 and the bottom panel 123 is adjacent to the back panel 30. The abutting portion 127 is used to abut against a portion of the housing 10 around the housing opening 24.

As shown in fig. 2, one of the top sheet body 122 and the cover body 110 is provided with a first protrusion 112 at a position facing each other, and the other is provided with a first opening 125. The first protrusion 112 is movably disposed at the first opening 125 along the moving direction D1.

Specifically, in the present embodiment, the top sheet body 122 has a first opening 125, and the cover body 110 has a first protrusion 112. Of course, in other embodiments, the top sheet body 122 may also have the first protrusion 112, and the cover body 110 may also have the first opening 125.

In the embodiment, the first protrusion 112 is integrally formed on the cover 110, but the first protrusion 112 may be fixed on the cover 110 by locking, riveting, fastening, and adhering, and is not limited to the above.

In addition, as shown in fig. 4A, in the present embodiment, the first opening 125 is a long hole or an elliptical hole. The length dimension L1 of the first opening 125 is greater than the dimension P (fig. 2) of the first projection 112 such that the first projection 112 is able to slide within the first opening 125. Therefore, the shield plate 120 can move relative to the cover 110. Of course, the form of the first opening 125 is not limited thereto.

FIG. 4B is a schematic view of a first opening of a floating shield mechanism according to another embodiment of the invention. Referring to fig. 4B, in the present embodiment, the first opening 125a is a circular hole. The diameter dimension d1 of the first opening 125a is greater than the dimension P of the first tab 112 (fig. 2). Therefore, the first protrusion 112 can also move relative to the first opening 125 a.

Referring back to fig. 3, the bottom plate 123 is located between the back plate 30 and the circuit board 10, one of the portions of the bottom plate 123 facing the back plate 30 is provided with a second protrusion 140, the other one is provided with a second opening 32, and the second protrusion 140 is movably disposed in the second opening 32 along the moving direction D1.

Specifically, in the present embodiment, the back plate 30 has the second opening 32, and the second protrusion 140 is disposed on the bottom plate 123. Of course, in other embodiments, the back plate 30 may be disposed on the bottom plate 123, and the second protrusion 140 may also have the second opening 32.

Further, in the present embodiment, the bottom body 123 has a screw hole 126, and the second protrusion 140 includes a nut 142, a boss 144 and a screw body 146 connected in sequence. The screw body 146 of the second protruding portion 140 is screwed to the screw hole 126 of the bottom plate body 123, and the boss 144 abuts against the bottom plate body 123, so that the second protruding portion 140 is firmly fixed on the bottom plate body 123 of the shielding plate 120.

In this embodiment, when the floating shielding mechanism 100 is assembled, the first protrusion 112 is inserted into the first opening 125, and then the second protrusion 140 is inserted through the second opening 32 of the back plate 30 and screwed into the screw hole 126 of the bottom plate 123. In other words, the second protrusion 140 is designed similar to a screw, which can improve the assembly convenience of the floating shielding mechanism 100.

Of course, in other embodiments, the second protrusion 140 may also be integrally formed on the bottom sheet body 123, for example, and is formed in a protruding or folding manner, without being limited thereto.

In addition, in the present embodiment, as shown in fig. 4A, the second opening 32 is a long hole or an elliptical hole. As shown in fig. 3, the length L2 and the width L3 (fig. 4A) of the second opening 32 are greater than the dimension R1 of the protrusion 144 of the second protrusion 140, so that the protrusion 144 of the second protrusion 140 can move in the second opening 32. Of course, the shape of the second opening 32 is not limited thereto.

In addition, in the present embodiment, the dimension R2 of the nut 142 is greater than the width dimension L3 (shown in fig. 4A) of the second opening 32, so that the back plate 30 is not separated from the bottom plate 123 and the second protrusion 140 at a position close to the second opening 32.

FIG. 4C is a schematic view of a second opening of a floating shield mechanism in accordance with another embodiment of the present invention. Referring to fig. 4C, in the present embodiment, the second opening 32a is a circular hole. The diameter dimension d2 of the second opening 32a is greater than the dimension R1 (fig. 3) of the boss 144 such that the boss 144 of the second projection 140 is movable within the second opening 32 a.

In addition, the dimension R2 of the nut 142 is larger than the diameter dimension d2 of the second opening 32, so that the back plate 30 does not get out of between the bottom plate 123 and the second protrusion 140 at the position close to the second opening 32 a.

In addition, as shown in fig. 3, in the present embodiment, the flexible conductor member 150 may compressively protrude from the inner surface 128 of the shielding plate 120 and contact the input/output ports 12. Therefore, the flexible conductor member 150 can be compressed so that the input/output port 12 on the circuit board 10 is relatively close to the shield plate 120. In the present embodiment, the flexible conductor 150 may be a conductive foam, which may be compressed and conductive, but the flexible conductor 150 is not limited thereto.

Fig. 5-6 are top schematic views of the circuit board module of fig. 1 installed in a chassis. It should be noted that fig. 5 and fig. 6 are schematic diagrams, and fig. 1 to fig. 4A are combined together. Referring to fig. 5, in the present embodiment, the housing 20 includes a housing opening 24 on the first wall 23 and a housing fixing hole 26 on the second wall 25. The circuit board 10 includes a circuit board fixing hole 14 therethrough.

When the circuit board 10 is assembled with the floating shielding mechanism 100 into the housing 20, the circuit board fixing holes 14 are aligned with the housing fixing holes 26 for screws (not shown) to lock the circuit board 10 to the housing 20.

However, as shown in fig. 5, when the circuit board 10 is assembled into the housing 20 together with the floating shielding mechanism 100, the shielding plate 120 abuts against the inner wall surface 27 around the housing opening 24, but the circuit board fixing hole 14 is not aligned with the housing fixing hole 26, so that the circuit board 10 cannot be locked on the housing 20.

Referring to fig. 6, in this embodiment, the flexible conductor 150 is used to be compressed. The assembler pushes the circuit board 10 along the moving direction D1 toward the first wall 23 of the casing 20, and the flexible conductor 150 is compressed, thereby making room for the circuit board fixing holes 14 to be located at the casing fixing holes 26. Thus, the circuit board fixing holes 14 are aligned with the case fixing holes 26, and screws can pass through the circuit board fixing holes 14 and the case fixing holes 26, so that the circuit board 10 is fixed on the case 20.

Fig. 7 is a schematic partial cross-sectional view of a shield sheet according to another embodiment of the present invention. Referring to fig. 7, in the present embodiment, the flexible conductor 150a is a bent elastic sheet formed by folding a portion of the shielding sheet 120. The flexible conductor 150a is adapted to abut the input and output ports 12 (shown in fig. 2). As shown in fig. 5, when the circuit board fixing hole 14 is not aligned with the chassis fixing hole 26, the assembler only pushes the circuit board 10 toward the first wall 23 of the chassis 20, and the flexible conductor 150a of the embodiment may be pressed toward the shielding plate 120, so that the circuit board fixing hole 14 is aligned with the chassis fixing hole 26. Of course, the kind of the flexible conductor member 150a is not limited thereto.

In summary, the floating shielding mechanism of the present invention is configured to the cover body and the back plate movably through the shielding plate, and the flexible conductor member is configured to protrude from the inner surface of the shielding plate in a compressible manner.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A floating shield mechanism for assembly on a circuit board assembly and with the circuit board assembly into a chassis, the circuit board assembly including a circuit board and a back plate secured to a bottom surface of the circuit board, the circuit board including a plurality of input/output ports at a top surface, the chassis including a chassis opening, the floating shield mechanism comprising:

the cover body is used for being fixed to the circuit board, is positioned on the top surface and covers the upper parts of the input and output ports;

a shielding plate movably arranged on the cover body and the back plate, wherein the shielding plate is provided with a plurality of openings which respectively correspond to the input and output ports; and

a flexible conductor compressibly protruding from the inner surface of the shield plate and used for contacting the input/output ports,

when the circuit board assembly and the floating type shielding mechanism are assembled in the case together, the input/output ports are exposed out of the case opening, and the flexible conductor part is used for being compressed to enable the shielding sheet to abut against the inner wall surface around the case opening.

2. A floating shield mechanism as recited in claim 1, wherein the shield comprises a main body and a top body connected to the main body in a bent manner, the input and output ports are located on the main body, one of the top body and the cover body at positions facing each other is provided with a first protrusion, the other one is provided with a first opening, and the first protrusion is movably disposed at the first opening along a moving direction.

3. A floating shield mechanism as claimed in claim 2, wherein the first protrusion is integrally formed on the housing, and the first opening is an elongated hole, an elliptical hole or a circular hole.

4. The floating type shielding mechanism of claim 1, wherein the shielding plate comprises a main body and a bottom body connected to the main body in a bending manner, the input/output ports are located on the main body, the bottom body is located between the back plate and the circuit board, one of the bottom body and the back plate is provided with a second protrusion at a portion facing each other, and the other one is provided with a second opening, and the second protrusion is movably disposed at the second opening along a moving direction.

5. The floating type shielding mechanism of claim 4, wherein the bottom body has a screw hole, the second protrusion comprises a nut, a boss and a body connected in sequence, the body of the second protrusion is screwed into the screw hole of the bottom body, and the boss passes through the second opening of the back plate and abuts against the bottom body.

6. A floating shield mechanism as claimed in claim 5, characterized in that the second opening is an elongated hole or an elliptical hole, the size of the nut is larger than the width of the second opening, the width and length of the second opening are larger than the size of the boss.

7. A floating shield mechanism as claimed in claim 5, wherein the second opening is a circular hole, the size of the nut being larger than the size of the second opening, the size of the second opening being larger than the size of the boss.

8. A floating shield mechanism as claimed in claim 1, characterized in that the flexible conductor is a conductive foam.

9. A floating shield mechanism as claimed in claim 1, characterized in that the flexible conductor is a bent leaf spring that is folded out of a part of the shield.

10. A circuit board module for assembly into a chassis, the chassis including a chassis opening in a first wall and a chassis securing hole in a second wall, the circuit board module comprising:

the circuit board comprises a circuit board fixing hole and a plurality of input and output ports, wherein the circuit board fixing hole penetrates through the circuit board fixing hole;

a back plate fixed to the bottom surface of the circuit board;

the floating shield mechanism of any of claims 1-9 disposed on the circuit board and the back plate,

when the circuit board, the back plate and the floating type shielding mechanism are assembled in the case together, the flexible conductor piece is compressed, so that the circuit board fixing hole is aligned with the case fixing hole, and the shielding sheet abuts against the inner wall surface around the opening of the case.