CN210781497U

CN210781497U - Anti-interference circuit board with separate conductive structure

Info

Publication number: CN210781497U
Application number: CN201921004352.9U
Authority: CN
Inventors: 房建春
Original assignee: Digital Printed Circuit Board Co Ltd
Current assignee: Digital Printed Circuit Board Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-06-16
Anticipated expiration: 2029-06-28

Abstract

The utility model provides an anti-interference circuit board with a separated conductive structure, which comprises a PCB main body and a shielding case, wherein the PCB main body comprises a first circuit layer, an insulating heat dissipation layer, an insulating substrate, a second circuit layer and an insulating base which are arranged from top to bottom in sequence, a plurality of conductive connecting columns are connected between the first circuit layer and the second circuit layer, and a plurality of conductive lugs are connected at the edge of the second circuit layer; the shielding case comprises a cover plate and a side plate, a positioning hole is formed in the cover plate, an insulating stand column is fixed on the insulating heat dissipation layer and penetrates through the first circuit layer, a positioning plate and a threaded column are sequentially fixed at the top of the insulating stand column, and the threaded column penetrates through the positioning hole and is in threaded connection with a nut. The utility model discloses the shield cover can cooperate the PCB main part to surround comprehensively and set up the electronic component on first circuit layer to improve the anti-interference ability to electromagnetic signal, and overall structure is stable firm, and heat dispersion is good.

Description

Anti-interference circuit board with separate conductive structure

Technical Field

The utility model relates to a circuit board specifically discloses an anti-interference circuit board with separation conducting structure.

Background

Circuit boards, also known as printed Circuit boards, printed Circuit boards or pcbs (printed Circuit boards), are important electronic components for supporting electronic components and are electrical connection carriers for electronic components. The circuit board is cut to a certain size by using an insulating board as a base material, and at least one conductive pattern is attached to the insulating board so as to obtain a circuit layer.

The circuit board is widely applied to various products, and when the circuit board is applied to the fields of communication and the like, the anti-interference performance of the circuit board and electronic elements on the circuit board is an important index. In the prior art, electronic components are directly soldered on a circuit board, external electromagnetic signals easily interfere with normal operation of the electronic components, and a shielding cover is disposed on a portion of the circuit board above the electronic components, but the shielding cover can only block the electromagnetic signals above the electronic components, and the electromagnetic signals from the side face still cause electromagnetic interference to the electronic components, thereby affecting the performance of the electronic components.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide an anti-interference circuit board with a separated conductive structure to solve the problems in the prior art, which can realize omnidirectional shielding of electronic components on the circuit board and has good anti-interference performance.

In order to solve the prior art problem, the utility model discloses an anti-interference circuit board with a separated conductive structure, which comprises a PCB main body and a shielding cover, wherein the PCB main body comprises a first circuit layer, an insulating heat dissipation layer, an insulating substrate, a second circuit layer and an insulating base which are arranged from top to bottom in sequence;

the shield cover includes a apron and four curb plates that highly are H, be equipped with a n locating hole on the apron, n is for being greater than 1 integer, be fixed with a n insulating stand that highly is H on the insulating heat dissipation layer, insulating stand passes first circuit layer, the top of insulating stand is fixed with locating plate and screw thread post in proper order, the screw thread post passes locating hole threaded connection and has the nut, the nut is located the top of apron, the thickness of locating plate is D, the gross thickness of insulating heat dissipation layer and insulating base plate is D, H + D < H < H + D + D.

Furthermore, the insulating heat dissipation layer is a heat dissipation silica gel layer.

Furthermore, a plurality of first heat dissipation through holes and second heat dissipation through holes are formed in the insulating heat dissipation layer, the first heat dissipation through holes penetrate through the front end face and the rear end face of the insulating heat dissipation layer, and the second heat dissipation through holes penetrate through the left end face and the right end face of the insulating heat dissipation layer.

Furthermore, a welding through hole is formed in the conductive tab.

Furthermore, the bottom of the insulating base is also provided with a waterproof heat dissipation plate.

Furthermore, the waterproof heat dissipation plate is an insulating ceramic layer.

Further, the shielding case is an aluminum shielding case.

The utility model has the advantages that: the utility model discloses an anti-interference circuit board with separation conducting structure is provided with sunken electrically conductive utmost point ear structure, and the electrically conductive utmost point ear of being connected with external device is not at same horizontal plane with first circuit layer, and the shield cover can cooperate the PCB main part to surround comprehensively and set up the electronic component on first circuit layer, can realize omnidirectional shielding to the electronic component on the circuit board to improve the interference killing feature to electromagnetic signal, and overall structure is stable firm, and heat dispersion is good.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The reference signs are: the PCB comprises a PCB body 10, a first circuit layer 11, a conductive connecting column 111, an insulating heat dissipation layer 12, a first heat dissipation through hole 121, a second heat dissipation through hole 122, an insulating substrate 13, a second circuit layer 14, a conductive tab 141, a welding through hole 142, an insulating base 15, a waterproof heat dissipation plate 16, a shielding cover 20, a cover plate 21, a positioning hole 211, a side plate 22, an insulating upright column 30, a positioning plate 31, a threaded column 32 and a nut 33.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Referring to fig. 1, fig. 1 is a schematic view of the three-dimensional structure of the present invention after the structure of the section is cut open.

The embodiment of the utility model discloses an anti-interference circuit board with separation conductive structure, including PCB main part 10 and shield cover 20, PCB main part 10 includes from last to down sets gradually first circuit layer 11, insulating heat dissipation layer 12, insulating substrate 13, second circuit layer 14 and insulating base 15, electronic component welds on first circuit layer 11, preferably, insulating substrate 13 and insulating base 15 are epoxy layer structure, be connected with a plurality of electrically conductive spliced poles 111 between first circuit layer 11 and second circuit layer 14, connect different circuits between first circuit layer 11 and second circuit layer 14 through each electrically conductive spliced pole 111, realize the intercommunication between the corresponding circuit, the edge of second circuit layer 14 is connected with a plurality of electrically conductive utmost point ear 141, electrically conductive utmost point ear 141 and second circuit layer 14 are integrated into one piece, each electrically conductive utmost point ear 141 connects the corresponding circuit in the second circuit layer 14, the external device is connected with the conductive tab 141 to realize conduction with the electronic element on the first circuit layer 11;

the shielding cover 20 comprises a cover plate 21 and four side plates 22 with a height of H, the four side plates 22 are arranged around the cover plate 21 to form a shielding cover 20 structure, the cover plate 21 is provided with n positioning holes 211, n is an integer larger than 1, i.e. n is at least 2, the insulating heat dissipation layer 12 is fixed with n insulating columns 30 with a height of H, the insulating columns 30 penetrate through the first circuit layer 11, the top of the insulating columns 30 is sequentially fixed with a positioning plate 31 and a threaded column 32, the insulating columns 30, the positioning plate 31 and the threaded column 32 are integrally formed, the threaded column 32 is a column body provided with external threads, the threaded column 32 penetrates through the positioning holes 211 and is in threaded connection with a nut 33, the nut 33 is positioned at the top of the cover plate 21, the nut 33 locks the cover plate 21 on the positioning plate 31, the threaded column 32 can effectively limit the position of the cover plate 21 by matching with the positioning holes 211, the thickness of the positioning plate 31 is D, h + D < H + D, which can effectively avoid short circuit caused by the contact of the side plate 22 and the conductive tab 141.

The first circuit layer 11 is communicated with the second circuit layer 14, the conductive tabs 141 connected with an external device are sunk below the shielding case 20, the shielding case 20 can surround the electronic element, and the electronic element is wrapped by the shielding case 20 and the PCB body 10, so that the external electromagnetic interference is effectively resisted.

The utility model discloses be provided with sunken conductive tab 141 structure, the conductive tab 141 who is connected with external device is not at same horizontal plane with first circuit layer 11, and shielding case 20 can cooperate PCB main part 10 to surround comprehensively and set up the electronic component on first circuit layer 11, can realize omnidirectional shielding to the electronic component on the circuit board to improve the interference killing feature to electromagnetic signal, and overall structure is stable firm, and heat dispersion is good.

In this embodiment, the insulating heat dissipation layer 12 is a heat dissipation silicone layer, and the heat dissipation silicone has good heat dissipation performance, which can effectively improve the heat dissipation performance of the first circuit layer 11 and the electronic components thereon.

Based on the above embodiment, the insulating heat dissipation layer 12 is provided with a plurality of first heat dissipation through holes 121 and second heat dissipation through holes 122, preferably, the distances between the first heat dissipation through holes 121 are equal, the distances between the second heat dissipation through holes 122 are equal, the first heat dissipation through holes 121 penetrate through the front and rear end surfaces of the insulating heat dissipation layer 12, and the second heat dissipation through holes 122 penetrate through the left and right end surfaces of the insulating heat dissipation layer 12.

In this embodiment, be equipped with welding through-hole 142 in the conductive tab 141, welding through-hole 142 runs through the upper and lower surface of battery tab, and when conductive tab 141 links to each other with external lines, welding through-hole 142 can supply the conductor wire to pass, can also hold soldering tin, can effectively improve welded structure's fastness.

In this embodiment, the bottom of insulating base 15 still is equipped with waterproof heating panel 16, and waterproof heating panel 16 tiptoe stands insulating base 15, can effectively increase the height between second circuit layer 14 and the installation face, can effectively avoid moisture to ooze to second circuit layer 14, can also improve the heat dispersion of second circuit layer 14.

Based on the above embodiment, the waterproof heat dissipation plate 16 is an insulating ceramic layer, and the waterproof heat dissipation plate 16 is connected with the insulating base 15 through glue, so that the density of the insulating ceramic is high, moisture cannot permeate into the insulating ceramic, the heat conductivity of the insulating ceramic is good, and the heat dissipation performance of the second circuit layer 14 can be effectively ensured.

In the present embodiment, the shield case 20 is an aluminum shield case, and aluminum has a good electromagnetic shielding performance.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The anti-interference circuit board with the separated conductive structure is characterized by comprising a PCB main body (10) and a shielding case (20), wherein the PCB main body (10) comprises a first circuit layer (11), an insulating heat dissipation layer (12), an insulating substrate (13), a second circuit layer (14) and an insulating base (15) which are sequentially arranged from top to bottom, a plurality of conductive connecting columns (111) are connected between the first circuit layer (11) and the second circuit layer (14), and a plurality of conductive lugs (141) are connected at the edge of the second circuit layer (14);

shield cover (20) include a apron (21) and four highly curb plates (22) for H, be equipped with n locating hole (211) on apron (21), n is for being greater than 1 integer, be fixed with n insulating stand (30) highly for H on insulating heat dissipation layer (12), insulating stand (30) are passed first circuit layer (11), the top of insulating stand (30) is fixed with locating plate (31) and screw thread post (32) in proper order, screw thread post (32) are passed locating hole (211) threaded connection has nut (33), nut (33) are located the top of apron (21), the thickness of locating plate (31) is D, insulating heat dissipation layer (12) with the gross thickness of insulating base plate (13) is D, (H + D) < H < (H + D + D).

2. The circuit board with separated conductive structures for resisting interference of claim 1, wherein the insulating and heat dissipating layer (12) is a heat dissipating silicone layer.

3. The anti-interference circuit board with the separated conductive structure as claimed in claim 1 or 2, wherein a plurality of first heat dissipating through holes (121) and second heat dissipating through holes (122) are formed in the insulating heat dissipating layer (12), the first heat dissipating through holes (121) penetrate through front and rear end faces of the insulating heat dissipating layer (12), and the second heat dissipating through holes (122) penetrate through left and right end faces of the insulating heat dissipating layer (12).

4. The tamper resistant circuit board with separate conductive structure of claim 1 wherein said conductive tabs (141) have solder through holes (142) formed therein.

5. The anti-interference circuit board with the separated conducting structure according to claim 1, characterized in that the bottom of the insulating base (15) is further provided with a waterproof heat dissipation plate (16).

6. Anti-interference circuit board with separated conducting structure according to claim 5, characterized in that said waterproof and heat-dissipating board (16) is a ceramic insulating layer.

7. A tamper resistant circuit board with separate conductive structures according to claim 1, characterized in that the shield (20) is an aluminum shield.