CN204119699U - Circuit board assembly device installed in equipment - Google Patents

Abstract

The utility model discloses a kind of circuit board assembling device be installed in equipment, comprising: bolt, its one end is fixed on the housing of described equipment; Through the elastic washer of described bolt; Circuit board, it offers installation through hole, and it is installed through hole and is padded on described elastic washer through described bolt; Pad, is padded on described circuit board through described bolt; Spring and nut, described spring is padded on described pad through described bolt; Described nut is tightened mutually with the other end of described bolt, and touches with described spring interface.In the technical scheme of the utility model embodiment, spring is provided with between circuit board in circuit board assembling device and the nut fixing this circuit board, elastic washer is lined with between circuit board and the housing of equipment, the performance that circuit board resistance to mechanical is impacted can be improved, thus the reliability of circuit board can be improved.

Description

Circuit board assembly device installed in equipment

technical field

The utility model relates to the communication field, in particular to a circuit board assembly device installed in equipment.

Background technique

Wireless access devices are usually used in field expeditions, exploration, electric power repairs, emergency rescue and disaster relief and other occasions. Compared with the indoor environment, the working environment of the wireless access device in the above occasions is relatively harsh, for example: encountering bumps or collisions, drastic temperature changes, high humidity, high pH and so on. Therefore, high reliability becomes one of the development trends of wireless access devices.

At present, a schematic structural diagram of an existing circuit board assembly device installed in a wireless access device is shown in FIG. And a plurality of nuts 104 matched with the bolts 102. The circuit board 103 defines a plurality of through holes 131 , and the diameter of the through holes 131 is larger than the outer diameter of the bolt 102 and smaller than the outer diameter of the nut 104 . For each bolt 102 , the bolt 102 penetrates a through hole 131 on the circuit board 103 , and the associated nut 104 of the bolt 102 presses the circuit board 103 between the lower surface of the nut and the inner surface of the housing 101 .

Then, in the existing circuit board assembly device, the circuit board is rigidly connected to the housing of the device, and between the circuit board and the nut; once an external impact is caused, it is easy to cause damage to the circuit board, thereby causing the entire wireless access Device does not work. It can be seen that the reliability of the circuit board in the existing circuit board assembly device is low. Therefore, it is necessary to provide a circuit board assembly device installed in equipment to improve the reliability of the circuit board.

Utility model content

Aiming at the above-mentioned defects in the prior art, the utility model provides a circuit board assembly device installed in equipment, and the circuit board has high reliability.

According to the technical solution of the utility model, a circuit board assembly device installed in equipment is provided, including:

a bolt, one end of which is fixed on the housing of the device;

elastic washers passing through said bolts;

The circuit board is provided with an installation through hole, and the installation through hole passes through the bolt and is placed on the elastic washer;

a washer passing through the bolt and resting on the circuit board;

A spring and a nut, the spring passes through the bolt and is placed on the washer; the nut is tightened with the other end of the bolt and is in contact with the spring.

Preferably, one end of the bolt is welded to the inner surface of the housing; and

The material of the elastic washer is specifically rubber.

Preferably, the circuit board specifically includes: a first circuit board and a second circuit board; and

The first circuit board includes: a control circuit module and an input circuit module, the input end and the output end are respectively connected to the output end of the input circuit module and the first isolation circuit electrically connected to the control circuit module, and both are connected to the control circuit The module is electrically connected to the display circuit module and the first communication circuit module;

The first isolation circuit is used to convert the electrical signal output by the input circuit module into an optical signal, and then convert the optical signal into an electrical signal and output it to the control circuit module;

The second circuit board includes: a main control circuit module, an output circuit module whose input end is electrically connected to the main control circuit module, a second isolation circuit whose input end is electrically connected to the output end of the output circuit module, and all connected to the output circuit module. The modular circuit module and the second communication circuit module electrically connected to the main control circuit module;

The second isolation circuit is used to convert the electrical signal output by the main control circuit module into an optical signal, and then convert the optical signal into an electrical signal and output it to the output circuit module;

The first communication circuit module is electrically connected to the second communication circuit module.

Further, the first circuit board also includes:

The first power supply module is used to supply power to the control circuit module, the display circuit module, the first isolation circuit, the input circuit module, and the first communication circuit module respectively; and

The second circuit board also includes:

The second power supply module is used to supply power to the main control circuit module, the output circuit module, the second isolation circuit, the module circuit module and the second communication circuit module respectively.

Further, the first circuit board also includes:

The third isolation circuit, its input terminal and output terminal are respectively electrically connected to the first communication circuit module and the second communication circuit module, and is used to convert the electrical signal output by the first communication circuit module into an optical signal, and then convert the optical signal outputting the electrical signal to the second communication circuit module; and

The second circuit board also includes:

The fourth isolation circuit, its input terminal and output terminal are respectively electrically connected to the second communication circuit module and the first communication circuit module, and is used to convert the electrical signal output by the second communication circuit module into an optical signal, and then convert the optical signal The electric signal is output to the first communication circuit module.

Preferably, both the first and second isolation circuits are specifically optocouplers; and

Both the third and fourth isolation circuits are specifically optocouplers.

Further, the second circuit board also includes: several signal isolators; and

The input end and the output end of the module circuit module are respectively electrically connected to the main control circuit module through the signal isolator.

Further, the circuit board assembly device further includes: a protective layer covering the surface of the circuit board.

Preferably, the protective layer has a thickness of 15-25 μm.

Preferably, the protective layer is specifically a three-proof paint.

In the technical scheme of the utility model, a spring is provided between the circuit board in the circuit board assembly device and the nut fixing the circuit board, and an elastic washer is placed between the circuit board and the shell of the equipment, which can improve the mechanical impact resistance of the circuit board performance, which can improve the reliability of the circuit board.

Moreover, laying a preservation layer on the surface of the circuit board can enhance the waterproof and dustproof performance of the circuit board, acid and alkali resistance, and static resistance; thereby the reliability of the circuit board can be further improved.

In addition, a photocoupler connected to the input and output circuits is installed in the circuit board, which can prevent external signals from interfering with the signals in the circuit of the circuit board, and can improve the anti-electromagnetic interference performance of the circuit board; thereby further improving the performance of the circuit board. reliability. The photoelectric coupler and signal isolator arranged between the circuit modules of the circuit board can prevent the mutual interference between the circuit modules, which is beneficial to improve the anti-electromagnetic interference performance of the circuit board.

Description of drawings

Fig. 1 is the structural representation of existing circuit board assembly device;

Fig. 2 is a schematic structural view of a circuit board assembly device according to an embodiment of the present invention;

Fig. 3 is the framework schematic diagram of the circuit structure of the circuit board of the utility model embodiment;

Fig. 4 is a schematic diagram of the internal structure frame of the second power supply module according to the embodiment of the present invention;

FIG. 5 is a schematic diagram of a protective layer in a circuit board assembly device according to an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for readers to have a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be realized even without these specific details.

The inventor of the utility model considers that a flexible material layer can be added between the circuit board of the circuit board assembly device and the shell of the equipment, between the circuit board and the nut; when the circuit board assembly device is subjected to external impact, these flexible materials The layer can convert mechanical energy into internal energy dissipation, reduce the mechanical impact of the circuit board, and prevent the loss of the circuit board; thereby improving the reliability of the circuit board.

Moreover, a protective layer can also be added on the surface of each integrated circuit, component, circuit, etc. on the circuit board of the circuit board assembly device to improve the performance of the circuit board against high humidity and acid and alkali, and further improve the reliability of the circuit board. .

In addition, isolation devices can also be provided at the input and output ends of the circuit board of the circuit board assembly device, which can isolate signals in the circuit board from signals outside the circuit board, and can improve the ability of the circuit board to resist electromagnetic interference.

The technical solutions of the embodiments of the present invention will be specifically introduced below in conjunction with the accompanying drawings.

The structural diagram of the circuit board assembly device installed in the equipment (such as wireless access device) of the utility model embodiment is shown in Figure 2, including: a plurality of bolts 202, a circuit board 203, and a plurality of bolts 202 matching A nut 204, a plurality of elastic washers 205, a plurality of washers 206 and a plurality of springs 207.

One end of the bolt 202 is fixed on the casing 201 of the device.

The elastic washer 205 passes through the bolt 202 .

The circuit board 203 defines an installation through hole 231 , and the installation through hole 231 of the circuit board 203 passes through the bolt 202 and rests on the elastic washer 205 .

The washer 206 passes through the bolt 202 and rests on the circuit board 203 .

The spring 207 passes through the bolt 202 and rests on the washer 206 ; the nut 204 is tightened with the other end of the bolt 202 and is in contact with the spring 207 .

The diameter of the installation through hole 231 in the circuit board 203 is larger than the outer diameter of the bolt 202 and smaller than the outer diameter of the elastic washer 205 and the washer 206 .

The inner diameter of the elastic washer 205 is larger than the outer diameter of the bolt 202 .

The inner diameter of the washer 206 is larger than the outer diameter of the bolt 202 and smaller than the outer diameter of the spring 207 .

The inner diameter of the spring 207 is larger than the outer diameter of the bolt 202 and smaller than the outer diameter of the nut 204 .

In the circuit board assembly device of the embodiment of the utility model, the mechanical impact of the external force on the circuit board assembly device is absorbed by the spring between the nut and the circuit board, and the mechanical impact is absorbed by the elastic washer between the circuit board and the shell of the equipment, which greatly improves the The mechanical shock resistance of the circuit board improves the mechanical shock resistance of the circuit board assembly device and improves the reliability of the circuit board.

In the circuit board assembly device of the embodiment of the present invention, one end of the bolt 202 is welded on the inner surface of the casing 201 of the device. The material of the elastic washer 205 is specifically rubber. The material of the gasket 206 is nickel alloy, which is soft in texture and strong in corrosion resistance.

In the circuit board assembly device of the embodiment of the present invention, a schematic frame diagram of the circuit structure of the circuit board 203 is shown in FIG. 3 , which specifically includes a first circuit board 301 and a second circuit board 302 . The first circuit board 301 includes: a control circuit module 401 , a display circuit module 402 , a first isolation circuit 403 , an input circuit module 404 , and a first communication circuit module 405 .

The control circuit module 401 may specifically be an MCU (Micro Controller Unit, Micro Control Unit), ARM (Advanced RISC Machine, Advanced Reduced Instruction Set Machine), etc. Specifically, the first isolation circuit 403 may be a photocoupler. The optocoupler is used to convert the input electrical signal into an optical signal, and then convert the optical signal into an electrical signal output, so as to realize the isolation of the electrical signal at the input end of the optocoupler from the electrical signal at the output end. The specific working principle of the photocoupler is well known to those skilled in the art, and will not be repeated here.

The input end and the output end of the first isolation circuit 403 are respectively electrically connected with the output end of the input circuit module 404 and the control circuit module 401; after the electrical signal output by the input circuit module 404 is converted into an optical signal, the optical signal is converted It is an electrical signal output to the control circuit module 401.

Both the display circuit module 402 and the first communication circuit module 405 are electrically connected to the control circuit module 401 .

The second circuit board 302 includes: a main control circuit module 501 , an output circuit module 502 , a second isolation circuit 503 , a module circuit module 504 , and a communication circuit module 505 .

The main control circuit module 501 may specifically be an MCU, an ARM, or the like. The second isolation circuit 503 may specifically be a photocoupler.

The input end and the output end of the output circuit module 502 are respectively electrically connected to the main control circuit module 501 and the second isolation circuit 503; the second isolation circuit 503 is used to convert the electrical signal output by the main control circuit module 501 into an optical signal, and then The optical signal is converted into an electrical signal and output to the output circuit module 502 .

The main control circuit module 501 is electrically connected to the module circuit module 504 and the communication circuit module 505 respectively.

The second communication circuit module 505 is electrically connected to the first communication circuit module 405 .

The working principle of the circuit board 203 in the circuit board assembly device of the embodiment of the present invention includes: after the input circuit module 404 receives the instruction input by the user, it is transmitted to the control circuit module 401 through the first isolation circuit 403; The instruction is forwarded to the display circuit module 402 for display, or the instruction is sequentially transmitted to the main control circuit module 501 through the first communication circuit module 405 and the second communication circuit module 505; after the main control circuit module 501 parses the received instruction, Perform operations according to the analysis results, for example, after communicating with the module circuit module 504 according to the analysis results, the communication results are output through the output circuit module 502 and the second isolation circuit 503 in turn; or the communication results are sequentially passed through the second communication circuit module 505 . After the first communication circuit module 405 returns to the control circuit unit 401, it is displayed by the display circuit module 402.

In the circuit board assembly device of the embodiment of the present invention, the first and second isolation circuits can prevent external signals from interfering with the signals in the circuit of the circuit board, and can improve the performance of the circuit board against electromagnetic interference; Being arranged on two circuit boards can reduce the interference between the circuit modules; thus the reliability of the circuit board can be improved.

The first circuit board 301 also includes a first power supply module (not marked in the figure), which is used to supply power to the control circuit module 401, the display circuit module 402, the first isolation circuit 403, the input circuit module 404, and the first communication circuit module 405 respectively. .

The second circuit board 302 also includes a second power supply module (not marked in the figure), which is used for the main control circuit module 501, the output circuit module 502, the second isolation circuit 503, the module circuit module 504, and the second communication circuit module. 505 power supply.

The module circuit module 504 specifically includes: GSM (Global System for Mobile Communications, Global System for Mobile Communications) communication unit, 3G (3rd Generation wireless telephone technology, third generation mobile communication technology) communication unit, LTE (Time Division Long Term Evolution, time division long term Evolution) communication unit, Beidou SMS unit, Wifi (Wireless Fidelity, wireless local area network) unit. The GSM communication unit, the 3G communication unit, the LTE communication unit, the Beidou SMS unit, and the Wifi unit are electrically connected to the main control circuit module 501 respectively.

The internal structure frame diagram of the second power supply module is shown in FIG. 4 , which specifically includes: a charging circuit unit 561 , a battery 562 and a power supply circuit unit 563 .

The output end of the charging circuit unit 561 is connected to the battery 562 for charging the battery 562 .

The power supply circuit unit 563 includes: an inverter, a transformer with a primary coil and a plurality of secondary coils, and a rectification and filtering circuit.

The battery 562 is connected to the primary coil of the transformer of the power supply circuit unit 563 through the inverter in the power supply circuit unit 563, and the multiple secondary coils of the transformer of the power supply circuit unit 563 are respectively connected to the main control circuit module 501, output A circuit module 502 , a second isolation circuit 503 , a module circuit module 504 , and a second communication circuit module 505 . That is, the battery 562 supplies power to the main control circuit module 501 , the output circuit module 502 , the second isolation circuit 503 , the module circuit module 504 , and the second communication circuit module 505 respectively through the power supply circuit unit 563 . Supplying power through a transformer can prevent the current and voltage on the primary coil side of the transformer from interfering with the current and voltage on the secondary coil side.

More preferably, the first circuit board 301 further includes a third isolation circuit 407 . The second circuit board 302 also includes a fourth isolation circuit 507 .

The input end and the output end of the third isolation circuit 407 are electrically connected to the first communication circuit module 405 and the second communication circuit module 505 respectively, and are used to convert the electrical signal output by the first communication circuit module 405 into an optical signal, and then The optical signal is converted into an electrical signal and output to the second communication circuit module 505 .

The input end and the output end of the fourth isolation circuit 508 are electrically connected to the second communication circuit module 505 and the first communication circuit module 405 respectively, and are used to convert the electrical signal output by the second communication circuit module 505 into an optical signal, and then convert the The optical signal is converted into an electrical signal and output to the first communication circuit module 405 . Both the third isolation circuit 407 and the fourth isolation circuit 507 are specifically optocouplers.

The first power module also supplies power to the third isolation circuit 407 ; the second power module also supplies power to the fourth isolation circuit 507 . The third isolation circuit 407 and the fourth isolation circuit 507 can greatly reduce the mutual interference between the electrical signals in the first circuit board 301 and the electrical signals in the second circuit board 302 , and further improve the anti-electromagnetic interference performance of the circuit boards.

More preferably, the second circuit board 302 also includes several signal isolators (not marked in the figure); the input end and the output end of the module circuit module 504 are respectively electrically connected to the main control circuit module 501 through the signal isolators. The specific connection mode and working principle of the signal isolator are well known to those skilled in the art, and will not be repeated here.

More preferably, as shown in FIG. 5 , the circuit board assembly device of the embodiment of the present invention further includes: a protective layer 208 covering the surface of the circuit board 203 . Specifically, a protective layer 208 covers the control circuit module 401, the display circuit module 402, the first isolation circuit 403, the input circuit module 404, the first communication circuit module 405, the first power supply module, the second Three isolation circuits 407, and other components (such as chip resistors, chip capacitors, etc.) and the surface of the printed circuit; another protective layer 208 covers the main control circuit module 501 and the output circuit module in the second circuit board 302 502, the second isolation circuit 503, the module circuit module 504, the communication circuit module 505, the second power supply module, the fourth isolation circuit 507, signal isolators, and other components and printed circuits.

The protective layer 232 is specifically a three-proof paint, for example, an acrylic three-proof paint, a polyurethane three-proof paint, or a silicone three-proof paint. The thickness of the protection layer 208 is specifically 15-25 μm.

The protective layer 232 can enhance the mechanical strength of the circuit board, greatly enhance the performance of the circuit board in waterproof and dustproof, acid and alkali resistance, and static electricity resistance; thus, the reliability of the circuit board assembly device can be improved.

In the technical scheme of the embodiment of the utility model, a spring is provided between the circuit board in the circuit board assembly device and the nut fixing the circuit board, and an elastic washer is placed between the circuit board and the shell of the equipment, which can improve the resistance of the circuit board. Mechanical shock performance, which can improve the reliability of the circuit board.

Moreover, laying a preservation layer on the surface of the circuit board can enhance the waterproof and dustproof performance of the circuit board, acid and alkali resistance, and static resistance; thereby the reliability of the circuit board can be further improved.

In addition, a photocoupler connected to the input and output circuits is installed in the circuit board, which can prevent external signals from interfering with the signals in the circuit of the circuit board, and can improve the anti-electromagnetic interference performance of the circuit board; thereby further improving the performance of the circuit board. reliability. The photoelectric coupler and signal isolator arranged between the circuit modules of the circuit board can prevent the mutual interference between the circuit modules, which is beneficial to improve the anti-electromagnetic interference performance of the circuit board.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present utility model.

Claims (10)

1. be installed on the circuit board assembling device in equipment, it is characterized in that, comprising:

Bolt, its one end is fixed on the housing of described equipment;

Through the elastic washer of described bolt;

Circuit board, it offers installation through hole, and it is installed through hole and is padded on described elastic washer through described bolt;

Pad, is padded on described circuit board through described bolt;

Spring and nut, described spring is padded on described pad through described bolt; Described nut is tightened mutually with the other end of described bolt, and touches with described spring interface.

2. circuit board assembling device as claimed in claim 1, it is characterized in that, one end of described bolt is welded on the inner surface of described housing; And

The material of described elastic washer is specially rubber.

3. circuit board assembling device as claimed in claim 1, it is characterized in that, described circuit board specifically comprises: first circuit board and second circuit board; And

First circuit board comprises: control circuit module and input circuit module, the first buffer circuit that input, output are electrically connected with the output of described input circuit module, described control circuit module respectively, and the display circuit module be all electrically connected with described control circuit module and the first communication circuit module;

This light signal is converted to the signal of telecommunication and outputs to described control circuit module after being used for that the signal of telecommunication that described input circuit module exports is converted to light signal by the first buffer circuit;

Second circuit board comprises: the second buffer circuit that the output circuit module that governor circuit module, input are electrically connected with described governor circuit module, input are electrically connected with the output of described output circuit module, and the modular circuit module be all electrically connected with described governor circuit module and second communication circuit module;

This light signal is converted to the signal of telecommunication and outputs to described output circuit module after being used for that the signal of telecommunication that described governor circuit module exports is converted to light signal by the second buffer circuit;

First communication circuit module is electrically connected with second communication circuit module.

4. circuit board assembling device as claimed in claim 3, it is characterized in that, first circuit board also comprises:

First power module, for being respectively described control circuit module, display circuit module, the first buffer circuit, input circuit module, the first communication circuit module power; And

Second circuit board also comprises:

Second source module, for being respectively described governor circuit module, output circuit module, the second buffer circuit, modular circuit module, second communication circuit module power.

5. circuit board assembling device as claimed in claim 4, it is characterized in that, first circuit board also comprises:

3rd buffer circuit, its input, output are electrically connected with the first communication circuit module, second communication circuit module respectively, after the signal of telecommunication for being exported by the first communication circuit module being converted to light signal, this light signal being converted to the signal of telecommunication and outputting to second communication circuit module; And

Second circuit board also comprises:

4th buffer circuit, its input, output are electrically connected with second communication circuit module, the first communication circuit module respectively, after the signal of telecommunication for being exported by second communication circuit module being converted to light signal, this light signal being converted to the signal of telecommunication and outputting to the first communication circuit module.

6. the circuit board assembling device as described in as arbitrary in claim 3-5, it is characterized in that, first and second buffer circuit is all specially photoelectrical coupler; And

Third and fourth buffer circuit is all specially photoelectrical coupler.

7. the circuit board assembling device as described in as arbitrary in claim 3-5, it is characterized in that, second circuit board also comprises: several signal isolators; And

Input, the output of described modular circuit module are electrically connected with described governor circuit module respectively by described signal isolator.

8. the circuit board assembling device as described in as arbitrary in claim 1-5, is characterized in that, also comprise: the protective layer being covered in described circuit board surface.

9. circuit board assembling device as claimed in claim 8, it is characterized in that, the thickness of described protective layer is 15-25 μm.

10. circuit board assembling device as claimed in claim 8, it is characterized in that, described protective layer is specially three anti-paints.