Multilayer circuit board with electromagnetic shielding function

Abstract

The utility model discloses a multilayer circuit board with an electromagnetic shielding function, which belongs to the technical field of circuit boards, and comprises a circuit board body, the top of the circuit board body is provided with a mounting seat, the bottom of the mounting seat is fixedly connected with a plurality of connecting columns, the bottom of each connecting column is provided with a threaded hole, and the threaded holes are communicated with the mounting seat. And connecting screws are in threaded connection with the interiors of the threaded holes. The electromagnetic shielding case is provided with the mounting seat, the locking assembly and the electromagnetic shielding case, the mounting seat fixes and locks the electromagnetic shielding case through the locking assembly, the mounting and dismounting process of the electromagnetic shielding case is greatly simplified, the maintenance cost is reduced, and the service life of the circuit board is prolonged; the connecting columns at the bottom of the mounting seat are inserted into the corresponding through holes in the circuit board body, the length of the connecting columns is slightly smaller than the depth of the through holes, and the connecting screws are inserted into the threaded holes at the bottoms of the connecting columns and screwed tightly, so that the mounting seat is tightly attached to the circuit board body, and the connection stability is greatly enhanced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to circuit board technical field, concretely is a kind of multilayer circuit board with electromagnetic shielding function. BACKGROUND

[0002] Circuit board is the key component of electronic equipment, it is insulating plate as base, connect various electronic components by printing circuit, realize signal transmission and processing, multilayer circuit board is the advanced form developed on the basis of circuit board, it is formed by the alternation of multiple insulating layers and conductive layers, realizes interlayer electrical connection using via, can integrate more components and circuit in narrow space, improve integration and performance, electromagnetic shield is a kind of metal cover for circuit board, its function is to cover circuit board or specific electronic component, form a closed space, effectively block internal electromagnetic signal radiate outward, while prevent external electromagnetic interference from entering.

[0003] The existing multilayer circuit board with electromagnetic shielding function still has the following disadvantages: the existing multilayer circuit board with electromagnetic shielding function is more troublesome to assemble and disassemble electromagnetic shield, the existing electromagnetic shield is connected with the circuit board by fixing bolts, and the bolts need to be twisted one by one with the help of a screwdriver and other tools during assembly and disassembly. In the case where the shield has multiple bolts, this process is time-consuming and labor-intensive. During electronic product maintenance, the maintenance personnel need to spend a lot of time disassembling the bolts to open the shield and check the internal circuit, which seriously affects the maintenance efficiency. Moreover, during the disassembly process, if the operation is not proper, the screwdriver is easy to scratch the precision components on the circuit board, causing component damage and further increasing maintenance cost. UTILITY MODEL CONTENTS

[0004] In order to overcome the above-mentioned defects, the utility model provides a multilayer circuit board with electromagnetic shielding function, which solves the problem of the existing multilayer circuit board with electromagnetic shielding function being more troublesome to assemble and disassemble electromagnetic shield.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a multilayer circuit board with electromagnetic shielding function, comprising a circuit board body, a mounting seat is arranged on the top of the circuit board body, a plurality of connecting columns are fixedly connected to the bottom of the mounting seat, a threaded hole is formed in the bottom of each connecting column, a connecting screw is threadedly connected in the threaded hole, two pairs of L-shaped limiting blocks are fixedly connected to the top of the mounting seat, a pair of locking assemblies are arranged on the top of the mounting seat, an electromagnetic shield is arranged on the top of the mounting seat, and a plurality of heat dissipation fins are fixedly connected to the top of the electromagnetic shield.

[0006] As a further scheme of the utility model: a plurality of through holes are formed in the circuit board body, each through hole is matched with a corresponding connecting column.

[0007] As a further scheme of the utility model: the electromagnetic shielding cover two sides are fixedly connected with wedge strip one.

[0008] As a further scheme of the utility model: the locking assembly includes a support plate, the support plate is fixedly connected to the top of the mounting seat, a pair of limiting rods are slidably connected to the support plate, a spring is sleeved on the periphery of each limiting rod, a fixed plate is fixedly connected to the end of each limiting rod, wedge strip two is fixedly connected to the side of the fixed plate away from the limiting rod, a connecting rod is fixedly connected to the other end of each limiting rod, a connecting plate is fixedly connected to the side of the connecting rod away from the support plate, and a pull block is fixedly connected to the side of the connecting plate away from the connecting rod.

[0009] As a further scheme of the utility model: a sliding rod is slidably connected to the connecting plate, a limiting cap is fixedly connected to the top of the sliding rod, a pull ring is fixedly connected to the top of the limiting cap, and a bolt is fixedly connected to the bottom of the sliding rod.

[0010] As a further scheme of the utility model: a supporting plate is fixedly connected to the side of the support plate away from the fixed plate, and a receiving plate is formed in the supporting plate.

[0011] As a further scheme of the utility model: the top of the mounting seat is provided with an electromagnetic sealing washer.

[0012] As a further scheme of the utility model: the electromagnetic sealing washer is made of conductive silicone rubber.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] 1、The utility model discloses a mounting seat, locking assembly and electromagnetic shielding cover are set up, the mounting seat is set up on the circuit board body, the mounting seat is fixedly locked with the electromagnetic shielding cover through the locking assembly, greatly simplifies the installation and disassembly process of the electromagnetic shielding cover, when operating, the staff does not need to twist the bolt again with the help of a tool, and the locking assembly can be operated simply, so that the shielding cover can be quickly assembled or disassembled, the problems such as thread wear and element scratch caused by frequent bolt twisting are avoided, maintenance cost is reduced, and the service life of the circuit board is prolonged.

[0015] 2、The utility model discloses a mounting seat, connecting column and connecting screw, the connecting column of the bottom of the mounting seat is inserted into the corresponding through hole on the circuit board body, the length of the connecting column is slightly less than the depth of the through hole, the connecting screw is inserted into the threaded hole at the bottom of the connecting column and is tightened, so that the mounting seat is tightly attached to the circuit board body, the connecting stability is greatly enhanced, and the mounting seat is effectively prevented from loosening, when the equipment is running, the influence of external force such as vibration and impact can be resisted. ACCURACY OF DRAWINGS

[0016] Figure 1 It is the whole schematic view of the utility model;

[0017] Figure 2 It is the circuit board body section and the connecting column section schematic view of the utility model;

[0018] Figure 3 It is the circuit board body schematic view of the utility model;

[0019] Figure 4 It is the electromagnetic shield cover section schematic view of the utility model;

[0020] Figure 5 It is the mounting seat schematic view of the utility model;

[0021] Figure 6 It is the locking assembly structure schematic view of the utility model.

[0022] In the drawing: 1, circuit board body;2, mounting seat;3, connecting column;4, connecting screw;5, L type limit block;6, electromagnetic shield cover;7, heat dissipation fin;8, wedge strip one;9, support plate;10, limit rod;11, spring;12, fixed plate;13, wedge strip two;14, connecting rod;15, connecting plate;16, pull block;17, slide rod;18, limit cap;19, pull ring;20, bolt;21, bearing plate;22, electromagnetic sealing washer. Specific implementation

[0023] The technical scheme of the patent will be further explained in detail in combination with specific implementation.

[0024] As Figures 1-6 shown, the utility model provides a technical scheme:

[0025] A kind of multilayer circuit board with electromagnetic shielding function, including circuit board body 1, the top of circuit board body 1 is provided with mounting seat 2, the bottom of mounting seat 2 is fixedly connected with multiple connecting columns 3, the bottom of each connecting column 3 is equipped with threaded hole, threaded hole is connected with connecting screw 4 in screw thread, the top of mounting seat 2 is fixedly connected with two pairs of L-shaped limit block 5, mounting seat 2 top is provided with a pair of locking assembly, mounting seat 2 top is provided with electromagnetic shield 6, multiple through holes are equipped on circuit board body 1, each through hole is adapted to corresponding connecting column 3, the both sides of electromagnetic shield 6 are fixedly connected with wedge strip one 8, connecting column 3 of mounting seat 2 bottom is inserted into corresponding through hole on circuit board body 1, the length of connecting column 3 is slightly less than the depth of through hole, connecting screw 4 is inserted into the threaded hole of the bottom of connecting column 3 and is tightened, so that mounting seat 2 and circuit board body 1 are tightly attached, greatly enhance the stability of connection, effectively prevent mounting seat 2 loose, when equipment runs, can resist the influence of external force such as vibration, impact, electromagnetic shield 6 is arranged between the two pairs of L-shaped limit block 5 on the top of mounting seat 2, L-shaped limit block 5 can limit the corresponding right angle of electromagnetic shield 6, prevent electromagnetic shield 6 from moving transversely on the top of mounting seat 2, locking assembly can be locked with the wedge strip one 8 on the both sides of electromagnetic shield 6 and electromagnetic shield 6 is locked on the top of mounting seat 2;

[0026] The top of electromagnetic shield 6 is fixedly connected with multiple heat dissipation fins 7, heat dissipation fin 7 greatly enhances the heat dissipation capacity of electromagnetic shield 6, heat dissipation fin 7 has larger surface area, can quickly conduct the heat accumulated in electromagnetic shield 6 to surrounding air, accelerates heat exchange, prevents the elements on circuit board body 1 from performance decline due to overheating even damage, prolongs the service life of circuit board body 1;

[0027] The locking assembly comprises a support plate 9 fixedly connected to the top of the mounting seat 2, a pair of limiting rods 10 slidably connected to the support plate 9, a spring 11 sleeved on the outer periphery of each limiting rod 10, a fixed plate 12 fixedly connected to one end of each limiting rod 10, a wedge-shaped strip two 13 fixedly connected to the side of the fixed plate 12 away from the limiting rod 10, a connecting rod 14 fixedly connected to the other end of each limiting rod 10, a connecting plate 15 fixedly connected to the side of the connecting rod 14 away from the support plate 9, and a pull block 16 fixedly connected to the side of the connecting plate 15 away from the connecting rod 14. The spring 11 pushes the fixed plate 12 and the wedge-shaped strip one 8 to be in close contact, so that the wedge-shaped strip two 13 is blocked on the top of the wedge-shaped strip one 8, and the electromagnetic shield 6 can be prevented from moving vertically. At this time, one side of the connecting rod 14 is in close contact with the support plate 9. When the electromagnetic shield 6 needs to be removed, the pull block 16 is pulled outward, the pull block 16 drives the connecting rod 14 to move away from the support plate 9 through the connecting plate 15, the connecting rod 14 drives the pair of limiting rods 10 to slide on the support plate 9, and the spring 11 is compressed. The limiting rod 10 drives the wedge-shaped strip two 13 to move away from the top of the wedge-shaped strip one 8 through the fixed plate 12, so that the electromagnetic shield 6 can be taken off from between the two pairs of L-shaped limiting blocks 5 on the top of the mounting seat 2. The disassembly process of the electromagnetic shield 6 is greatly simplified. When the staff operates, it is not necessary to use tools to twist the bolts. The electromagnetic shield 6 can be quickly disassembled by simply pulling the pull block 16, the problems of thread wear and element scratching caused by frequent twisting of the bolts are avoided, the maintenance cost is reduced, and the service life of the circuit board body 1 is prolonged. When the circuit board body 1 needs to be repaired or upgraded, the electromagnetic shield 6 can be quickly opened, and the work efficiency is greatly improved.

[0028] A sliding rod 17 is slidably connected to the connecting plate 15, a limiting cap 18 is fixedly connected to the top of the sliding rod 17, a pull ring 19 is fixedly connected to the top of the limiting cap 18, a latch 20 is fixedly connected to the bottom of the sliding rod 17, a supporting plate 21 is fixedly connected to the side of the support plate 9 away from the fixed plate 12, and a through insertion hole is formed in the supporting plate 21. The connecting plate 15 drives the sliding rod 17 to move together, the sliding rod 17 drives the limiting cap 18, the pull ring 19 and the latch 20 to move together, and the latch 20 slides on the top surface of the supporting plate 21. When the connecting plate 15 moves a distance, the latch 20 falls into the through insertion hole in the supporting plate 21, so that the position of the connecting plate 15 is fixed. The limiting cap 18, the sliding rod 17 and the latch 20 can be lifted by the pull ring 19, the latch 20 is pulled out of the through insertion hole, so that the connecting plate 15 is released, the spring 11 returns to the original state, the spring 11 pushes the fixed plate 12 and the wedge-shaped strip two 13 to return to the original state.

[0029] The top of the mounting seat 2 is provided with an electromagnetic sealing washer 22, the electromagnetic sealing washer 22 is made of conductive silicone rubber, the conductive silicone rubber is made of silicone rubber added with metal particles, and has elasticity and conductivity; the bottom of the electromagnetic shielding cover 6 extrudes the electromagnetic sealing washer 22, so that the electromagnetic sealing washer 22 is tightly attached to the electromagnetic shielding cover 6, small gaps between the mounting seat 2 and the electromagnetic shielding cover 6 are effectively filled, a leakage path of electromagnetic interference is blocked, the electromagnetic shielding effect is greatly enhanced, the precise circuit on the circuit board body 1 is prevented from being affected by external electromagnetic interference, and the electromagnetic compatibility of the equipment is improved.

[0030] The working principle of the utility model is as follows:

[0031] The connecting column 3 at the bottom of the mounting seat 2 is inserted into the corresponding through hole on the circuit board body 1, the length of the connecting column 3 is slightly smaller than the depth of the through hole, the connecting screw 4 is inserted into the threaded hole at the bottom of the connecting column 3 and is tightened, so that the mounting seat 2 is tightly attached to the circuit board body 1, the connection stability is greatly enhanced, and the mounting seat 2 is effectively prevented from loosening; when the equipment is running, external force such as vibration and impact can be resisted.

[0032] The electromagnetic shielding cover 6 is arranged between the two pairs of L-shaped limiting blocks 5 at the top of the mounting seat 2, the L-shaped limiting blocks 5 can limit the corresponding right angles of the electromagnetic shielding cover 6, the electromagnetic shielding cover 6 is prevented from moving transversely at the top of the mounting seat 2, the spring 11 pushes the fixed plate 12 and the wedge-shaped strip one 8 to be tightly attached, so that the wedge-shaped strip two 13 is blocked at the top of the wedge-shaped strip one 8, the electromagnetic shielding cover 6 is prevented from moving vertically, the bottom of the electromagnetic shielding cover 6 extrudes the electromagnetic sealing washer 22, so that the electromagnetic sealing washer 22 is tightly attached to the electromagnetic shielding cover 6, small gaps between the mounting seat 2 and the electromagnetic shielding cover 6 are effectively filled, and a leakage path of electromagnetic interference is blocked.

[0033] When the electromagnetic shielding cover 6 needs to be removed, the pull block 16 is pulled outward, the pull block 16 drives the connecting rod 14 away from the supporting plate 9 through the connecting plate 15, the connecting rod 14 drives the pair of limiting rods 10 to slide on the supporting plate 9, the spring 11 is compressed, the limiting rod 10 drives the wedge-shaped strip two 13 to move away from the top of the wedge-shaped strip one 8 through the fixed plate 12, the connecting plate 15 drives the sliding rod 17 to move together, the sliding rod 17 drives the limiting cap 18, the pull ring 19 and the bolt 20 to move together, the bolt 20 slides on the top surface of the receiving plate 21, when the connecting plate 15 moves for a distance, the bolt 20 falls into the through insertion hole in the receiving plate 21, so that the position of the connecting plate 15 is fixed, the electromagnetic shielding cover 6 can be taken off between the two pairs of L-shaped limiting blocks 5 at the top of the mounting seat 2, and the dismounting process of the electromagnetic shielding cover 6 is greatly simplified.

[0034] The above describes the preferred embodiment of the patent in detail, but the patent is not limited to the above embodiment, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the patent.

Claims

1. A multilayer circuit board having an electromagnetic shielding function, comprising a circuit board body (1), characterized by: The circuit board body (1) top is provided with mounting seat (2), mounting seat (2) bottom fixedly connected with a plurality of connecting columns (3), each connecting column (3) bottom is provided with threaded hole, threaded hole is connected with connecting screw (4), mounting seat (2) top fixedly connected with two pairs of L type limit block (5), mounting seat (2) top is provided with a pair of locking assembly, mounting seat (2) top is provided with electromagnetic shield cover (6), electromagnetic shield cover (6) top fixedly connected with a plurality of heat dissipation fins (7).

2. The multilayer circuit board having an electromagnetic shielding function according to claim 1, characterized by: A plurality of through holes are formed in the circuit board body (1), and each through hole is matched with a corresponding connecting column (3).

3. The multilayer circuit board having an electromagnetic shielding function according to claim 2, characterized by: The electromagnetic shield cover (6) is fixedly connected with a wedge strip (8) on both sides.

4. The multilayer circuit board having an electromagnetic shielding function according to claim 3, wherein: The locking assembly comprises a support plate (9) fixedly connected to the top of the mounting seat (2), a pair of limit rods (10) slidably connected to the support plate (9), a spring (11) sleeved on the outer periphery of each limit rod (10), a fixed plate (12) fixedly connected to one end of each limit rod (10), a wedge strip (13) fixedly connected to the side of the fixed plate (12) away from the limit rod (10), a connecting rod (14) fixedly connected to the other end of each limit rod (10), a connecting plate (15) fixedly connected to the side of the connecting rod (14) away from the support plate (9), and a pull block (16) fixedly connected to the side of the connecting plate (15) away from the connecting rod (14).

5. The multilayer circuit board having an electromagnetic shielding function according to claim 4, wherein: A sliding rod (17) is slidably connected to the connecting plate (15), a limit cap (18) is fixedly connected to the top of the sliding rod (17), a pull ring (19) is fixedly connected to the top of the limit cap (18), and a latch (20) is fixedly connected to the bottom of the sliding rod (17).

6. The multilayer circuit board having an electromagnetic shielding function according to claim 5, wherein: A support plate (21) is fixedly connected to the side of the support plate (9) away from the fixed plate (12), and a through insertion hole is formed in the support plate (21).

7. The multilayer circuit board having an electromagnetic shielding function according to claim 6, wherein: An electromagnetic sealing washer (22) is arranged on the top of the mounting seat (2).

8. The multilayer circuit board having an electromagnetic shielding function according to claim 7, wherein: The electromagnetic sealing washer (22) is made of conductive silicone rubber.

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