CN113133293B

CN113133293B - Floating type shielding mechanism and circuit board module

Info

Publication number: CN113133293B
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: 2023-10-13
Anticipated expiration: 2040-01-15
Also published as: CN113133293A

Abstract

A floating shielding mechanism comprises a cover body, a shielding sheet and a flexible conductor. The cover is used for being fixed to a circuit board and covering a plurality of input/output ports of the circuit board. The shielding plate 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 compressively protrudes from the inner surface of the shield and is configured to contact the input and output ports. When the circuit board, the back plate and the floating shielding mechanism are assembled into a chassis, the input and output ports are exposed out of the opening of the chassis, and the flexible conductor is used for being compressed to enable the shielding sheet to abut against the inner wall surface around the opening of the chassis.

Description

Floating type 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 great number of mainboards are integrated with the IO shielding mechanism, namely, the IO shielding mechanism is directly locked on the mainboards and then is loaded into the chassis together. However, after the motherboard is locked into the chassis, the IO shielding mechanism may be affected by tolerance and may not be well attached to the chassis, which may cause a problem of poor electromagnetic shielding.

Disclosure of Invention

The invention provides a floating shielding mechanism which can move relative to a circuit board assembly so as to be well lapped to a chassis when the floating shielding mechanism is 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 shield mechanism.

The invention relates to a floating shielding mechanism which is used for being assembled on a circuit board assembly and assembled into a chassis 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 chassis comprises a chassis opening, and the floating shielding mechanism comprises a cover body, a shielding sheet and a flexible conductor piece. The cover body is used for fixing to the circuit board, and the cover body is located on the top surface and covers the upper portions of the input and 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 compressively protrudes from the inner surface of the shield and is configured to contact the input and output ports. When the circuit board assembly and the floating shielding mechanism are assembled into the chassis, the input and output ports are exposed out of the opening of the chassis, and the flexible conductor is used for being compressed to enable the shielding sheet to abut against the inner wall surface around the opening of the chassis.

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

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

In an embodiment of the invention, the second opening is a rectangular 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 round 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 conductive member is conductive foam.

In an embodiment of the invention, the flexible conductor is a bent elastic sheet that is turned out by a part of the shielding sheet.

The invention relates to a circuit board module which is used for being assembled into a chassis, wherein the chassis comprises a chassis opening positioned on a first wall and a chassis fixing hole positioned on a second wall, and the circuit board module comprises a circuit board, a backboard and a floating shielding mechanism. The circuit board comprises a through circuit board fixing hole and a plurality of input and output ports positioned on the top surface. The backboard is fixed to the bottom surface of the circuit board. The floating shielding mechanism is arranged on the circuit board and the backboard. When the circuit board, the backboard and the floating shielding mechanism are assembled into the chassis, the flexible conductor piece is used for being compressed, so that the circuit board fixing hole is positioned in the chassis fixing hole, and the shielding sheet is abutted against the inner wall surface around the opening of the chassis.

Based on the above, the floating shielding mechanism of the present invention is movably configured on the cover and the back plate by the shielding sheet, and the flexible conductor is compressively protruded from the inner surface of the shielding sheet, when the circuit board assembly and the floating shielding mechanism are assembled into the chassis, the flexible conductor is used for being compressed and the shielding sheet can move relative to the circuit board, so that the shielding sheet abuts against the inner wall surface around the opening of the chassis.

The invention will now be described in more detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.

Drawings

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

Fig. 2 is a schematic partial cross-sectional view along line A-A of fig. 1.

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

Fig. 4A is an exploded view of the floating shield and 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 present invention.

Fig. 4C is a schematic view of a second opening of a floating shield mechanism according to another embodiment of the present invention.

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

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

Wherein, the reference numerals:

d1: direction of movement

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

1: circuit board module

2: circuit board assembly

10: circuit board

12: input/output port

14: circuit board fixing hole

16: top surface

18: bottom surface

20: case (S)

23: a first wall

24: case opening

25: a second wall

26: case fixing hole

27: inner wall surface

30: backboard

32. 32a: a second opening

100: floating shielding mechanism

110: cover body

112: first projection

120: shielding sheet

121: main sheet body

122: top sheet body

123: bottom sheet body

124: perforating the hole

125. 125a: a first opening

126: screw hole

127: abutment portion

128: inner surface

140: second protruding part

142: screw cap

144: boss

146: screw body

150. 150a: flexible conductor

Detailed Description

The structural and operational principles of the present invention are described in detail below with reference to the accompanying drawings:

fig. 1 is a schematic diagram of a circuit board module according to an embodiment of the invention. Referring to fig. 1, a circuit board module 1 of the present embodiment is used for assembly into a chassis 20 (shown in fig. 5). The circuit board module 1 includes a circuit board assembly 2 and a floating shield mechanism 100. The circuit board assembly 2 includes a circuit board 10 and a back plate 30 secured 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.

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

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, the circuit board 10 and the back plate 30 are assembled to the chassis 20, so as to achieve a good electromagnetic shielding effect. This will be described below.

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

Referring to fig. 2 to 4A, the floating 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 on the cover 110 and the back plate 30 along a moving direction D1. In detail, the shielding plate 120 includes a main plate 121, a top plate 122 and a bottom plate 123 connected to the main plate 121 in a bending manner, and a plurality of abutting portions 127 surrounding the main plate 121.

The main body 121 of the shielding plate 120 has a plurality of openings 124, and the openings 124 correspond to the input/output ports 12, respectively. The top sheet 122 and the bottom sheet 123 are respectively located at opposite ends of the main sheet 121. The top sheet 122 is beside the cover 110 and the bottom sheet 123 is beside the back plate 30. The abutment 127 is for abutting against a portion of the casing 10 around the casing opening 24.

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

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

In the present embodiment, the first protruding portion 112 is integrally formed on the cover 110, but the first protruding portion 112 may be formed on the cover 110 by fastening, riveting, fastening, and bonding, which is not limited thereto.

In addition, as shown in fig. 4A, in the present embodiment, the first opening 125 is a rectangular 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 capable of sliding within the first opening 125. Accordingly, the shield blades 120 can move with respect 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 present 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 projection 112 (fig. 2). Accordingly, the first projection 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 and the back plate 30 facing each other is provided with a second protrusion 140, the other portion has 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 plate 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 body 123, and the boss 144 abuts against the bottom body 123, so that the second protruding portion 140 is firmly fixed on the bottom body 123 of the shielding sheet 120.

In this embodiment, when the floating shielding mechanism 100 is assembled, the first protruding portion 112 extends into the first opening 125, and then the second protruding portion 140 passes through the second opening 32 on the back plate 30 and is screwed to the screw hole 126 of the bottom plate 123. In other words, the second protrusion 140 adopts a screw-like design, which can promote the convenience of assembling the floating shield 100.

Of course, in other embodiments, the second protruding portion 140 may be integrally formed on the bottom sheet 123, for example, formed in a protruding or folding manner, but not limited thereto.

In addition, in the present embodiment, as shown in fig. 4A, the second opening 32 is a rectangular hole or an elliptical hole. As shown in fig. 3, the length dimension L2 and the width dimension L3 (fig. 4A) of the second opening 32 are greater than the dimension R1 of the boss 144 of the second protrusion 140, so that the boss 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 between 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 according to 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 greater than the diameter d2 of the second opening 32, so that the back plate 30 is not separated from the space between the bottom plate 123 and the second protrusion 140 at a position close to the second opening 32 a.

In addition, as shown in fig. 3, in the present embodiment, the flexible conductor 150 compressively protrudes from the inner surface 128 of the shield plate 120 and contacts the input/output ports 12. Thus, the flexible conductor 150 may be compressed such that the input/output ports 12 on the circuit board 10 are relatively close to the shield blades 120. In the present embodiment, the flexible conductor 150 may be conductive foam, which may be compressed and conductive, but the flexible conductor 150 is not limited thereto.

Fig. 5-6 are schematic top views of the circuit board module of fig. 1 loaded into a chassis. It should be noted that fig. 5 and fig. 6 are only schematic diagrams, and please match fig. 1 to fig. 4A together. Referring to fig. 5, in the present embodiment, the case 20 includes a case opening 24 on the first wall 23 and a case 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 into the chassis 20 together with the floating shielding mechanism 100, the circuit board fixing hole 14 is located in the chassis fixing hole 26 for a screw (not shown) to lock the circuit board 10 to the chassis 20.

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

Referring to fig. 6, since in the present embodiment, the flexible conductor 150 is used to be compressed. When the assembler pushes the circuit board 10 toward the first wall 23 of the chassis 20 along the moving direction D1, the flexible conductor 150 is compressed, thereby making room for the circuit board fixing hole 14 to be located in the chassis fixing hole 26. In this way, the circuit board fixing hole 14 can be positioned in the chassis fixing hole 26, and the screw can pass through the circuit board fixing hole 14 and the chassis fixing hole 26, so that the circuit board 10 is fixed on the chassis 20.

Fig. 7 is a schematic partial cross-sectional view of a shield slice according to another embodiment of the invention. Referring to fig. 7, in the present embodiment, the flexible conductor 150a is a bent elastic sheet that is folded out of 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 cannot be aligned with the chassis fixing hole 26, the assembler simply pushes the circuit board 10 toward the first wall 23 of the chassis 20, and the flexible conductor 150a of the present embodiment can be pressed against the shielding sheet 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 150a is not limited thereto.

In summary, the floating shielding mechanism of the present invention is movably disposed on the cover and the back plate by the shielding plate, and the flexible conductor is compressively protruded from the inner surface of the shielding plate, when the circuit board assembly and the floating shielding mechanism are assembled into the chassis, the flexible conductor is compressed and the shielding plate can move relative to the circuit board, so that the shielding plate abuts against the inner wall surface around the opening of the chassis.

Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those 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 for assembly 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 on 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;

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; and

a flexible conductor piece which is compressively protruded from the inner surface of the shielding sheet and is used for contacting the input and output ports,

when the circuit board assembly and the floating shielding mechanism are assembled into the chassis, the input and output ports are exposed out of the opening of the chassis, and the flexible conductor is used for being compressed to enable the shielding sheet to abut against the inner wall surface around the opening of the chassis;

the shielding sheet comprises a main sheet body and a bottom sheet body which is connected with the main sheet body in a bending way, the input and output ports are positioned on the main sheet body, the bottom sheet body is positioned between the back plate and the circuit board, one of the bottom sheet body and the back plate at the parts facing each other is provided with a second protruding part, the other one of the bottom sheet body and the back plate is provided with a second opening, and the second protruding part is movably arranged at the second opening along a moving direction.

2. The floating shield mechanism according to claim 1, wherein the shield plate comprises a main plate body and a top plate body connected to the main plate body in a bending manner, the input/output ports are located on the main plate body, one of the top plate body and the cover body at the positions facing each other is provided with a first protruding portion, the other one is provided with a first opening, and the first protruding portion is movably arranged in the first opening along a moving direction.

3. The floating shield mechanism according to claim 2, wherein the first protrusion is integrally formed with the housing, and the first opening is a slot, an oval hole or a round hole.

4. The floating shield of claim 1 wherein the bottom plate has a screw hole, the second protrusion comprises a nut, a boss and a screw body connected in sequence, the screw 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 bottom plate and abuts against the bottom plate.

5. The floating shield of claim 4 wherein the second opening is an elongated or elliptical hole, the size of the nut is greater than the width of the second opening, and the width and length of the second opening are greater than the size of the boss.

6. The floating shield mechanism of claim 4 wherein said second opening is a circular hole and said nut has a size greater than said second opening and said second opening has a size greater than said boss.

7. The floating shield mechanism of claim 1 wherein the flexible conductor is conductive foam.

8. The floating shield mechanism of claim 1 wherein the flexible conductor is a bent spring folded over a portion of the shield.

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

the circuit board comprises a through circuit board fixing hole and a plurality of input and output ports positioned on the top surface;

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

a floating shield according to claim 1 to 8, disposed on the circuit board and the back plate,

when the circuit board, the backboard and the floating shielding mechanism are assembled into the chassis, the flexible conductor piece is used for being compressed, so that the circuit board fixing hole pair is positioned in the chassis fixing hole, and the shielding piece is abutted against the inner wall surface around the opening of the chassis.