Anti-static printed circuit board structure for electric cooker

Abstract

The utility model discloses an anti-static printed circuit board structure for an electric cooker, and relates to the technical field of printed circuit boards, the anti-static printed circuit board structure comprises a fixed shell, a mainboard, a grounding unit and discharge teeth, the fixed shell comprises a first clamping plate, a placing shell, a second clamping plate, a heat dissipation groove and the mainboard, the side edge of the first clamping plate is clamped with the placing shell, and the second clamping plate is clamped with the heat dissipation groove. A first clamping plate is arranged on one side of the placement shell, a second clamping plate is clamped on one side, far away from the first clamping plate, of the placement shell, a heat dissipation groove is formed in the upper portion of the placement shell, the main board is arranged on two sides of the inner wall of the placement shell, a grounding unit is arranged on one side, far away from the main board, of the first clamping plate, and discharging teeth are arranged at the top end of the main board. When the circuit board generates static electricity in the operation process, the static electricity appears and flows along the mainboard at the moment, and the static electricity makes contact with the discharging teeth at the moment, so that current generated by the mainboard is guided and released.

Description

Technical Field

[0001] The utility model relates to the technical field of printed circuit boards, in particular to an antistatic printed circuit board structure for an electric rice cooker. Background Art

[0002] A printed circuit board (PCB) is a basic carrier for electrical connections between electronic components. It achieves circuit connection and transmission by printing a conductive pattern on an insulating substrate according to the circuit design. PCBs are widely used in various electronic devices, such as computers, mobile phones, and household appliances, because they improve the reliability, stability, and production efficiency of electronic devices. However, during the use of the motherboard, static electricity generated can directly penetrate the main body, causing damage to the motherboard and rendering it inoperable. Therefore, there is a need for an anti-static printed circuit board structure for rice cookers.

[0003] The application number retrieved is: CN201811047776.3, an anti-static printed circuit board, which is equipped with a series of structures so that the device has the advantages of good shock absorption effect, strong practicality and easy installation during use, thereby optimizing the use process.

[0004] However, the existing printed circuit boards still have certain defects in actual use: when the circuit board is in use, static electricity will accumulate on the mainboard itself. When the static electricity cannot be released, the energy of the static electricity at the moment of generation will directly break through the copper wire of the mainboard, thereby damaging the mainboard and making it unusable. For this reason, we propose an anti-static printed circuit board structure for rice cookers. Utility Model Content

[0005] In order to remedy the above deficiencies, the utility model provides an anti-static printed circuit board structure for an electric rice cooker, which aims to improve the problem that when the circuit board is used, static electricity accumulates on the mainboard itself. When the static electricity cannot be released, the energy of the static electricity at the moment of generation directly penetrates the copper relays of the mainboard, thereby damaging the mainboard and making it unusable.

[0006] The utility model realizes an anti-static printed circuit board structure for an electric rice cooker through the following technical scheme. The structure comprises a fixed shell, a main board, a grounding unit and a discharge tooth. The fixed shell comprises a first clamping plate, a placement shell, a second clamping plate, a heat dissipation groove and a main board. The side of the first clamping plate is clamped with the placement shell, and the side of the placement shell away from the first clamping plate is clamped with the second clamping plate. The heat dissipation groove is provided above the placement shell, and the main board is provided at both sides of the inner wall of the placement shell, and the grounding unit is provided on the side of the first clamping plate away from the main board, and the top of the main board is provided with the discharge tooth.

[0007] Furthermore, the mainboard includes a first welding plate, a wiring board and a second welding plate, and the wiring board is arranged below the first welding plate, and the second welding plate is arranged on a side of the wiring board away from the first welding plate.

[0008] Furthermore, the main board includes a main resistor, a varistor, a filter capacitor, a current limiting resistor and a relay, and a varistor is arranged below the main resistor, and a filter capacitor is arranged on the right side of the varistor, and a current limiting resistor is arranged below the filter capacitor, and a relay is arranged on the side of the current limiting resistor away from the varistor.

[0009] Furthermore, the mainboard also includes an electrolytic capacitor, a filter inductor, a plug socket, a power chip and a three-terminal voltage regulator block, and a filter inductor is arranged below the electrolytic capacitor, and a plug socket is arranged on the side of the filter inductor away from the filter capacitor, and a power chip is arranged below the filter inductor and the plug socket, and a three-terminal voltage regulator block is arranged on the side of the power chip away from the current limiting resistor.

[0010] Furthermore, the outer surface of the wiring board is provided with copper wires, and the holes of the heat dissipation slots are diamond-shaped.

[0011] The utility model provides an anti-static printed circuit board structure for an electric rice cooker, which has the following beneficial effects:

[0012] When the motherboard is in use, the main resistor, varistor, filter capacitor, current limiting resistor, relay, discharge teeth, electrolytic capacitor, filter inductor, plug socket, power chip and three-terminal voltage regulator are installed on the motherboard so that the motherboard can be operated. When the motherboard generates static electricity during operation, after the static electricity is generated, the static electricity comes into contact with the discharge teeth during the release process, so that the energy released by the static electricity is released and separated by the teeth between the discharge teeth, thereby completing the treatment of static electricity in the motherboard. The specific contents are as follows:

[0013] The fixed shell includes a first clamping plate, a placement shell, a second clamping plate, a heat dissipation groove and a mainboard, and the side of the first clamping plate is clamped with the placement shell, and the second clamping plate is clamped with the side of the placement shell away from the first clamping plate, and a heat dissipation groove is provided above the placement shell, and the mainboard is arranged on both sides of the inner wall of the placement shell, and a grounding unit is provided on the side of the first clamping plate away from the mainboard, and a discharge tooth is provided on the top of the mainboard, the mainboard includes a first welding plate, a wiring board and a second welding plate, and a wiring board is provided below the first welding plate, and a second welding plate is provided on the side of the wiring board away from the first welding plate, the mainboard includes a main resistor, a varistor, a filter capacitor, a current limiting resistor and a relay, and a varistor is provided below the main resistor, and a filter capacitor is provided on the right side of the varistor, and a current limiting resistor is provided below the filter capacitor, and a relay is provided on the side of the current limiting resistor away from the varistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of an antistatic printed circuit board structure for an electric rice cooker according to the present invention;

[0015] Figure 2 This is a schematic structural diagram of a mainboard of an antistatic printed circuit board structure for an electric rice cooker according to the present invention;

[0016] Figure 3 This is a schematic structural diagram of a front cross-section of a first welding plate of an antistatic printed circuit board structure for an electric rice cooker according to the utility model;

[0017] Figure 4 The utility model is a schematic diagram of a top cross-section of a wiring board of an anti-static printed circuit board structure for an electric rice cooker.

[0018] In the figure: 1. Fixed shell; 2. First clamping plate; 3. Placement shell; 4. Second clamping plate; 5. Heat sink; 6. Grounding unit; 7. Main board; 701. First welding plate; 702. Wiring board; 703. Second welding plate; 8. Main resistor; 9. Varistor; 10. Filter capacitor; 11. Current limiting resistor; 12. Relay; 13. Discharge tooth; 14. Electrolytic capacitor; 15. Filter inductor; 16. Plug socket; 17. Power chip; 18. Three-terminal voltage regulator block; 19. Copper relay. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] like Figure 1 - Figure 4As shown, an antistatic printed circuit board structure for an electric rice cooker comprises a fixed shell 1, a main board 7, a grounding unit 6 and a discharge tooth 13, wherein the fixed shell 1 comprises a first clamping plate 2, a placement shell 3, a second clamping plate 4, a heat dissipation groove 5 and the main board 7, and the side of the first clamping plate 2 is clamped with the placement shell 3, and the side of the placement shell 3 away from the first clamping plate 2 is clamped with the second clamping plate 4, and the top of the placement shell 3 is provided with a heat dissipation groove 5, and the main board 7 is arranged at both sides of the inner wall of the placement shell 3, and the side of the first clamping plate 2 away from the main board 7 is provided with a grounding unit 6, and the top of the main board 7 is provided with a discharge tooth 13, and wherein the fixed shell 1 is connected to the main board 7 by the first clamping plate 2, the second clamping plate 4, the heat dissipation groove 5 and the main board 7. The clamping plate 4 and the placement shell 3 are assembled, and the three are assembled by snapping. After the second clamping plate 4 and the placement shell 3 are fixed, the main board 7 is placed inside the assembly of the two, so that the grounding unit 6 on the main board 7 is in contact with the first clamping plate 2. After the first clamping plate 2 and the placement shell 3 are assembled, when the main board 7 is running, when the current is flowing, when the current is dissipating along the main body, the static electricity is contacted through the discharge teeth 13, thereby completing the processing of static electricity to protect the main board 7, and the grounding unit 6 contacted by the main board 7 is in contact with the outside, thereby diverting the static electricity.

[0021] The main board 7 includes a first welding plate 701, a wiring plate 702 and a second welding plate 703. The wiring plate 702 is arranged below the first welding plate 701, and the second welding plate 703 is arranged on the side of the wiring plate 702 away from the first welding plate 701. At this time, the main board 7 is assembled by the first welding plate 701, the wiring plate 702 and the second welding plate 703. At this time, each unit is installed in the connection hole of the first welding plate 701 respectively, thereby completing the assembly of the main board 7.

[0022] The main board 7 includes a main resistor 8, a varistor 9, a filter capacitor 10, a current limiting resistor 11 and a relay 12, and a varistor 9 is provided below the main resistor 8, and a filter capacitor 10 is provided on the right side of the varistor 9, and a current limiting resistor 11 is provided below the filter capacitor 10, and a relay 12 is provided on the side of the current limiting resistor 11 away from the varistor 9. The main resistor 8 is used to limit and regulate the current in the circuit to protect the circuit from overcurrent hazards, and the varistor 9 is provided in front of the power output terminal. At this time, when the current is transmitted, the varistor 9 provides lightning protection and overvoltage protection for the mainboard 7. At this time, the filter capacitor 10 is mainly used in the circuit to filter out unnecessary frequency components and improve the performance of the circuit. Adding a capacitor between the power line and the signal line can reduce noise and interference and improve the stability and reliability of the signal. At this time, the role of the limiting resistor is to limit the current or voltage in the circuit to prevent the circuit components from being damaged due to excessive current or voltage. The model of the relay 12 is G3MB-202P. Its role is to limit the rise of current or voltage when the current or voltage exceeds the safety threshold to protect the sensitive components in the circuit.

[0023] The main board 7 also includes an electrolytic capacitor 14, a filter inductor 15, a plug socket 16, a power chip 17 and a three-terminal voltage regulator block 18, and the filter inductor 15 is arranged below the electrolytic capacitor 14, and the plug socket 16 is arranged on the side of the filter inductor 15 away from the filter capacitor 10, and the power chip 17 is arranged below the filter inductor 15 and the plug socket 16, and the three-terminal voltage regulator block 18 is arranged on the side of the power chip 17 away from the current limiting resistor 11. At this time, the electrolytic capacitor 14 is often used as a filter in the power supply and signal lines to remove ripple or noise in the power supply and ensure stable operation of the circuit, and the filter inductor 15 is an inductor element used in the filter circuit. Its main function is to control the current and magnetic field in the circuit and remove the clutter signal, so as to make the signal transmission more stable and accurate. When the power supply chip 17 is in use, it converts the volts of alternating current into volts of direct current, so that the current can adapt to the use of the mainboard 7. When the current is transmitted into the interior of the three-terminal voltage regulator block 18, the three-terminal voltage regulator block 18 outputs the current voltage of volts to regulate the current.

[0024] The outer surface of the wiring board 702 is provided with copper relays 19, and the holes of the heat dissipation slots 5 are diamond-shaped. When the main board 7 is in operation, the current enters the interior of each unit through the copper relays 19 inside the wiring board 702 to realize the use function of each unit. When static electricity occurs on the main board 7, the copper-aluminum plate inside the wiring board 702 contacts the wiring board 702, so that the static electricity continues to flow through the teeth of the discharge teeth 13, so that the current will not cause static electricity to break through the copper relays 19 of the main board 7 while flowing.

[0025] In summary, the utility model fixes the housing 1, the mainboard 7, the grounding unit 6 and the discharge tooth 13, and at this time the mainboard 7 is assembled, and the varistor 9, the filter capacitor 10, the current limiting resistor 11, the relay 12, the discharge tooth 13, the electrolytic capacitor 14, the filter inductor 15, the plug socket 16, the power chip 17, and the three-terminal voltage regulator block 18 are respectively welded on the first welding plate 701 in the mainboard 7. At this time, the pins of the components penetrate the mainboard 7, so that the components are welded and fixed to the mainboard 7 by soldering. At this time, after the fixation is completed, when the current enters the interior of the mainboard 7 through the power output end of the mainboard 7, the current flows through the copper relay 19 in the wiring board 702, and the current passes through the main resistor 8, the varistor 9, the filter capacitor 10, the current limiting resistor 11, the electrolytic capacitor 14 and the filter inductor 15 process the circulating current, and the current transmitted into the device passes through the relay 12, the power chip 17 and the three-terminal voltage regulator block 18, thereby converting the current into the current used by the mainboard 7 and controlling the current. When the mainboard 7 generates static electricity during operation, the static electricity contacts the copper-aluminum plate connected to the discharge tooth 13 along the copper relay line 19, so that the static electricity contacts the discharge tooth 13 along the copper-aluminum plate, so that the static electricity is released through the discharge tooth 13. When the main body of the device is in contact with the static electricity, the static electricity is released to the ground through the grounding unit 6.

Claims

1. An antistatic printed circuit board structure for an electric rice cooker, comprising a fixed housing (1), a mainboard (7), a grounding unit (6) and a discharge tooth (13), characterized in that: The fixed housing (1) comprises a first snap-fit ​​plate (2), a placement shell (3), a second snap-fit ​​plate (4), a heat dissipation groove (5) and a main board (7), wherein the side of the first snap-fit ​​plate (2) is snap-fitted with the placement shell (3), and the side of the placement shell (3) away from the first snap-fit ​​plate (2) is snap-fitted with the second snap-fit ​​plate (4), and the heat dissipation groove (5) is arranged above the placement shell (3), and the main board (7) is arranged at both sides of the inner wall of the placement shell (3), and the side of the first snap-fit ​​plate (2) away from the main board (7) is provided with a grounding unit (6), and the top of the main board (7) is provided with a discharge tooth (13).

2. The antistatic printed circuit board structure for an electric rice cooker according to claim 1, characterized in that: The main board (7) comprises a first welding plate (701), a wiring board (702) and a second welding plate (703), wherein the wiring board (702) is arranged below the first welding plate (701), and the second welding plate (703) is arranged on a side of the wiring board (702) away from the first welding plate (701).

3. The antistatic printed circuit board structure for an electric rice cooker according to claim 1, characterized in that: The main board (7) comprises a main resistor (8), a varistor (9), a filter capacitor (10), a current-limiting resistor (11) and a relay (12), wherein the varistor (9) is arranged below the main resistor (8), the filter capacitor (10) is arranged on the right side of the varistor (9), the current-limiting resistor (11) is arranged below the filter capacitor (10), and the relay (12) is arranged on the side of the current-limiting resistor (11) away from the varistor (9).

4. The antistatic printed circuit board structure for an electric rice cooker according to claim 1, characterized in that: The mainboard (7) further comprises an electrolytic capacitor (14), a filter inductor (15), a plug socket (16), a power chip (17) and a three-terminal voltage stabilizing block (18), wherein the filter inductor (15) is arranged below the electrolytic capacitor (14), and the plug socket (16) is arranged on a side of the filter inductor (15) away from the filter capacitor (10), and the power chip (17) is arranged below the filter inductor (15) and the plug socket (16), and the three-terminal voltage stabilizing block (18) is arranged on a side of the power chip (17) away from the current limiting resistor (11).

5. The antistatic printed circuit board structure for an electric rice cooker according to claim 2, characterized in that: The outer surface of the wiring board (702) is provided with a copper relay (19), and the holes of the heat dissipation slots (5) are in a diamond shape.

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