A harmless grounding type protection structure

Abstract

The application relates to the technical field of circuits, and provides a harmless grounding type protection structure which comprises a bottom shell, an upper cover, a conductive piece, a connecting piece and a grounding mechanism; the upper cover and the bottom shell jointly form a mounting cavity; the bottom shell comprises a bottom plate, a first side plate and a second side plate; two first side plates are oppositely arranged, two second side plates are oppositely arranged, and the height of the first side plate is higher than that of the second side plate; the conductive pieces are arranged on the opposite sides of the two first side plates; the upper cover is in a U-shaped structure in a cross section, comprises a cover plate and two oppositely arranged fitting plates, the upper cover covers the bottom shell, the fitting plates abut against the second side plates, the connecting pieces penetrate through the first side plates and are clamped with the fitting plates, and the upper cover and the bottom shell are locked; the grounding mechanism is installed on the upper cover and is internally connected with internal equipment and externally connected with an external grounding point. The application has the effect of protecting circuit elements.

Description

Technical Field

[0001] This application relates to the field of circuit technology, and in particular to a harmless grounding protection structure. Background Technology

[0002] After the circuit design is completed and assembled, external protection is required, which is usually achieved by using an outer casing. Traditional casings mainly serve protective, shielding, and grounding functions. Furthermore, the casing of a transmission circuit mainly consists of a bottom frame and a top cover. The bottom frame is a single piece. Although this structure is simple, the sealing between the bottom frame and the top cover is relatively weak. Moreover, after the internal circuit is connected to electricity, the casing is prone to conduction and leakage, which affects normal use and can damage circuit components over time. Summary of the Invention

[0003] To improve the problem of circuit component damage caused by leakage current, this application provides a harmless grounding protection structure.

[0004] The harmless grounding protection structure provided in this application adopts the following technical solution:

[0005] A harmless grounding protection structure includes a bottom shell, a top cover, conductive elements, connectors, and a grounding mechanism. The top cover and the bottom shell together form an installation cavity. The bottom shell includes a bottom plate, a first side plate, and a second side plate. Two first side plates and two second side plates are arranged opposite each other, with the first side plates being higher than the second side plates. The conductive elements are provided on one side of each of the two first side plates facing opposite directions. The top cover has a U-shaped cross-section and includes a cover plate and two oppositely arranged fitting plates. After the top cover covers the bottom shell, the fitting plates abut against the second side plates. The connectors penetrate the first side plates and engage with the fitting plates to lock the top cover and the bottom shell together. The grounding mechanism is installed on the top cover and is connected to internal equipment and an external grounding point. When the circuit is energized, the current in the top cover and bottom shell is grounded through the conductive elements via the grounding mechanism.

[0006] By adopting the above technical solution, when the circuit board is powered on and leakage occurs on the surface, the bottom shell, conductive parts and the contact parts with the circuit board will connect the current to the entire shell, so as to ensure that leakage in each part can be contacted and connected through the whole shell. At the same time, when the current is connected, it is grounded through the grounding mechanism, thereby effectively protecting the circuit board equipment and reducing the impact of leakage on the circuit board.

[0007] Optionally, the connection point between the cover plate and the mating plate is provided with a wiring groove, and the grounding mechanism is engaged with the upper cover through the wiring groove.

[0008] By adopting the above technical solution, setting up a wiring groove can facilitate the connection of the grounding mechanism, and also facilitate disassembly and replacement.

[0009] Optionally, a seal is provided between the second side plate and the mating plate.

[0010] By adopting the above technical solution, the sealing element can increase the sealing performance of the connection between the second side plate and the mating plate, and improve the airtightness of the installation cavity.

[0011] Optionally, the first side plate has a through hole for the connector to pass through, and the groove of the wiring slot has an internal thread. The connector passes through the through hole and is screwed to the top cover through the internal thread.

[0012] By adopting the above technical solution, the screw connection method with internal and external threads allows the top cover and bottom shell to be screwed together through a connector. The screw connection method allows for easy disassembly, which is convenient for maintaining the circuit board inside the mounting cavity.

[0013] Optionally, the conductive element is made of conductive cotton.

[0014] By adopting the above technical solution, conductive cotton can conduct current and connect it to the grounding mechanism when leakage occurs in various parts of the casing, thereby protecting the safe operation of the circuit board. At the same time, the conductive cotton can cover the gaps at the connection points between the top cover and the bottom cover, improving the sealing performance.

[0015] Optionally, the grounding mechanism includes a power line, a grounding bolt, a grounding plate, a grounding nut, and a connector; the grounding bolt is slidably connected to the wiring groove; the grounding plate is sleeved on the grounding bolt; the connector is connected to the grounding plate through the power line, and three connectors are provided, corresponding to three power lines, namely a live wire, a neutral wire, and a ground wire. The connectors corresponding to the live wire and the neutral wire are plugged into internal equipment, and the connectors corresponding to the ground wire are connected to an external grounding point; the grounding nut is screwed into the grounding bolt.

[0016] By adopting the above technical solution, the grounding bolt moves along the grounding groove, and the three power lines are connected in a unified manner after the grounding plate is sleeved. Other connectors connect the three power lines to the circuit board and the external grounding point in sequence. After tightening the grounding nut, the leakage current is grounded and discharged through the corresponding connector of the grounding wire and the external grounding connection wire to provide leakage protection.

[0017] Optionally, it also includes an antistatic mechanism, which is installed on the cover plate and includes an ion fan, a flow element, and a sensing element; the ion fan is installed on the cover plate, and the output end of the ion fan passes through the cover plate to blow charged airflow into the mounting cavity; the flow element is installed on the bottom shell and communicates with the mounting cavity; the sensing element is connected to the cover plate and electrically connected to the ion fan.

[0018] By adopting the above technical solution, the ion fan can blow out charged airflow. When the charged airflow comes into contact with static electricity, it will neutralize and eliminate the static electricity. Normally, the ion fan is in a closed state. When leakage occurs, the sensor detects the leakage and transmits an electrical signal to the ion fan, which then controls the ion fan to turn on. After the ion fan blows the charged airflow to neutralize the static electricity, the airflow is discharged through the flow-through component.

[0019] Optionally, the flow element may be a one-way valve.

[0020] By adopting the above technical solution, the one-way valve ensures that the airflow can only be discharged from the mounting cavity and prevents external air from entering the mounting cavity, thereby ensuring the airtightness of the mounting cavity.

[0021] Optionally, the cover plate is further provided with a sliding plate, and the cover plate has a sliding groove and a vent on a plane away from the bottom shell. The sliding plate is slidably connected to the cover plate through the sliding groove, and the opening and closing of the vent is controlled during the sliding process of the sliding plate. The ion fan is installed on the sliding plate, and its output end passes through the sliding plate and communicates with the vent.

[0022] By adopting the above technical solution, the ion fan is manually pushed along the sliding groove by the sliding plate, so that the sliding plate blocks or opens the air vent, so as to ensure the airtightness while connecting the ion fan with the inside of the installation cavity.

[0023] Optionally, the cover plate is provided with a driving component, the output end of which is connected to the sliding plate and electrically connected to the sensing component.

[0024] By adopting the above technical solution, the opening and closing of the ion fan and the air vent are automatically controlled through the cooperation of the driving component and the sensing component, so as to ensure airtightness while providing electrostatic removal.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. When the circuit board is powered on and leakage occurs on the surface, the bottom shell, conductive parts and the contact parts with the circuit board will connect the current to the entire shell to ensure that leakage in each part can be contacted and connected through the whole shell. At the same time, when the current is connected, it is grounded through the grounding mechanism, thereby effectively protecting the circuit board equipment and reducing the impact of leakage on the circuit board.

[0027] 2. Conductive components can be made of conductive cotton. When there is leakage in various parts inside the casing, the current can be conducted and connected to the grounding mechanism to protect the safe operation of the circuit board. At the same time, the conductive cotton can cover the gaps at the connection points between the top cover and the bottom cover, improving the sealing performance.

[0028] 3. When leakage occurs, the sensing element detects the leakage and transmits an electrical signal to the ion fan, which then controls the ion fan to turn on. The ion fan blows an airflow that neutralizes static electricity, and the airflow is then discharged through the flow-through element.

[0029] 4. The driving component moves the sliding plate along the sliding groove, causing the sliding plate to move the ion fan away from the air vent and cover the air vent to provide a shielding seal. The opening and closing of the ion fan and the air vent are automatically controlled by the driving component and the sensing component to ensure airtightness while providing electrostatic removal. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the bottom shell and the top cover separated in Embodiment 1 of this application;

[0031] Figure 2 This is a right-view perspective three-dimensional structural diagram of the upper cover in Embodiment 1 of this application;

[0032] Figure 3 yes Figure 2 A magnified structural diagram of A in the middle;

[0033] Figure 4 This is a three-dimensional structural diagram of the upper cover in Embodiment 1 of this application;

[0034] Figure 5 This is a schematic diagram of the first three-dimensional structure of the protective structure in Embodiment 2 of this application;

[0035] Figure 6 This is a schematic diagram of the second three-dimensional structure of the protective structure in Embodiment 2 of this application;

[0036] Figure 7 This is a schematic diagram of the third three-dimensional structure of the protective structure in Embodiment 2 of this application;

[0037] The labels in the attached diagram are as follows: 1. Bottom shell, 11. Bottom plate, 12. First side plate, 13. Second side plate, 2. Top cover, 21. Cover plate, 22. Fitting plate, 23. Wiring groove, 3. Conductive component, 4. Connector, 5. Mounting cavity, 6. Sealing component, 7. Grounding mechanism, 71. Power line, 72. Grounding bolt, 73. Grounding plate, 74. Grounding nut, 75. Plug, 8. Static elimination mechanism, 81. Ionizing fan, 82. Flow component, 83. Sensing component, 84. Sliding plate, 85. Sliding groove, 86. Vent, 87. Driving component. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1 -Appendix Figure 7 This application will be described in further detail below.

[0039] This application discloses a harmless grounding protection structure.

[0040] Example 1:

[0041] A harmless grounding protection structure, referring to Figure 1 It includes a bottom shell 1, a top cover 2, conductive parts 3, connectors 4, and a grounding mechanism 7. The bottom shell 1 matches the top cover 2. After the bottom shell 1 and the top cover 2 come into contact with each other and fit together, they form a rectangular shell. The interior forms an installation cavity 5 for storing circuit boards. The shell provides protection, dustproofing, and noise insulation during the operation of the circuit boards. The bottom shell 1 includes a bottom plate 11, a first side plate 12, and a second side plate 13. The bottom plate 11 serves as the mounting plate for the internal circuit boards. The surface is provided with mounting rails for mounting and securing the circuit boards.

[0042] The first side plate 12 and the second side plate 13 serve as side guards, forming rectangular plates. Two first side plates 12 and two second side plates 13 are arranged opposite each other. The difference between the first side plate 12 and the second side plate 13 is that the first side plate 12 is higher than the second side plate 13, so that the top of the second side plate 13 is separated from the top of the first side plate 12 by a certain distance, which is used to match the top cover 2 for easy installation.

[0043] Each of the two first side plates 12 has a conductive element 3 on one side facing the other, and the first side plate 12 has a wiring port for routing when connecting external devices to the circuit board. The external connection wires are connected to the circuit board through the wiring port to provide power.

[0044] Reference Figure 2 As shown, the upper cover 2 has a U-shaped cross-section and can be integrally formed with the cover plate 21 and two oppositely arranged fitting plates 22. After the upper cover 2 covers the bottom shell 1, the two fitting plates 22 abut against each other with the two second side plates 13. Then, the connector 4 passes through the first side plate 12 and is snapped into the fitting plate 22 to lock the upper cover 2 and the bottom shell 1. The connector 4 can be a fixing bolt.

[0045] The grounding mechanism 7 is installed on the inner wall of the upper cover 2, specifically in the wiring groove 23 opened between the mating plate 22 and the cover plate 21. The grounding mechanism 7 is snapped into the upper cover 2 through the wiring groove 23, and the wiring structure is connected to the internal circuit board equipment and to the external grounding point, i.e., the external grounding connection line.

[0046] Reference Figure 3As shown, specifically, the grounding mechanism 7 includes power lines 71, grounding bolts 72, grounding plates 73, grounding nuts 74, and connectors 75. The head of the grounding bolt 72 is larger than the opening of the wiring groove 23. Therefore, the grounding bolt 72 is inserted into the wiring groove 23 through its tail. The grounding bolt 72 can also slide through the wiring groove 23 by extending its tail. When it slides to a suitable position, the grounding plate 73 is fitted onto the grounding bolt 72. The grounding plate 73 is larger than the opening of the wiring groove 23, so it cannot enter the wiring groove 23. The function of the grounding plate 73 is to coordinate and connect all the power lines 71, and then ground them. Nut 74 is screwed into grounding bolt 72 to prevent grounding plate 73 from detaching from grounding bolt 72 for tightening. After power line 71 is connected to grounding plate 73, the other end is provided with connector 75. There are three connectors 75 and three corresponding power lines 71, which correspond to live wire, neutral wire and ground wire respectively. The connectors 75 corresponding to live wire and neutral wire can be plugged into internal circuit board equipment. The exposed circuit can be led out through the two live wire and neutral wire power lines 71, and connected to the external grounding point through the ground wire connector 75 to protect the operation safety of the circuit board. The wiring groove 23 can be embedded in it for fixed wiring to facilitate the management of the circuit and avoid messy tangling.

[0047] The conductive component 3 can be made of conductive cotton. When leakage occurs in various parts of the casing, the conductive cotton can conduct the current and connect it to the grounding mechanism 7 to protect the safe operation of the circuit board. At the same time, the conductive cotton can cover the gap at the connection point between the top cover 2 and the bottom shell 1, improving the sealing performance.

[0048] The conductive cotton can be installed in two ways. One is to connect it by wrapping it around the corner of the first side plate 12. This method can reduce the amount of conductive cotton used and save materials. The other is to lay the conductive cotton sheet on the first side plate 12. This method can provide a noise reduction effect and reduce the noise generated by the power components in the circuit board.

[0049] The implementation principle of Embodiment 1 of this application includes: when the circuit board is energized and leakage occurs on the surface, the bottom shell 1, the conductive part 3 and the contact part with the circuit board will connect the current to the entire shell, so as to ensure that leakage in each part can be contacted and connected through the entire shell. At the same time, when the current is connected, the current is grounded through the grounding mechanism 7, thereby effectively protecting the circuit board equipment and reducing the impact of leakage on the circuit board.

[0050] Example 2:

[0051] Reference Figure 5As shown, this embodiment 2 is an optimization based on embodiment 1, and the optimization includes the following: an ion fan 81, a flow element 82, and a sensing element 83; the ion fan 81 is installed on the upper cover 2, and the output end of the ion fan 81 passes through the upper cover 2 to blow charged airflow into the mounting cavity 5; the flow element 82 is installed on the bottom shell 1 and communicates with the mounting cavity 5; the sensing element 83 is connected to the upper cover 2 and electrically connected to the ion fan 81.

[0052] When there is leakage, the circuit board generates current, which also causes the surface of the power components to be covered with an electrostatic layer. Most of the electrostatic layer is grounded and discharged at the contact part with the outer shell, while a small part of the electrostatic layer is covered on the surface of the power components that are not in contact with the outer shell, which is difficult to ground and eliminate. If the electrostatic is not dealt with in time, it will affect the service life of the circuit board. If the circuit board is affected by electrostatic for a long time, it is easy to be damaged by electrostatic breakdown and scrapped. Therefore, an ion fan 81 is set up to deal with it.

[0053] The ion fan 81 can blow out charged airflow. When the charged airflow comes into contact with static electricity, it will neutralize and eliminate the static electricity. Normally, the ion fan 81 is in a closed state. When leakage occurs, when the upper cover 2 and the bottom shell 1 are closed, the current can flow through the entire protection structure. After the sensor 83 senses the leakage, it transmits the electrical signal to the ion fan 81 and controls the ion fan 81 to open. After the ion fan 81 blows the charged airflow to neutralize the static electricity, the airflow is discharged through the flow part 82. The ion fan 81 closes after cleaning the static electricity, without affecting the airtightness of the installation cavity 5.

[0054] The flow element 82 can be a one-way valve. The one-way valve allows airflow to exit only from the mounting cavity 5 and prevents external air from entering the mounting cavity 5, thus ensuring the airtightness of the mounting cavity 5.

[0055] The sensing element 83 is a leakage current sensor, which is used to detect whether there is leakage contact in the bottom shell 1, and controls the ion fan 81 to turn on through an electrical signal.

[0056] Reference Figure 6 As shown, the cover plate 21 is provided with a sliding plate 84, and the cover plate 21 has a sliding groove 85 and a vent 86 on a plane away from the bottom shell 1. The sliding plate 84 is slidably connected to the sliding groove 85, and the vent 86 is covered during the sliding process. The ion fan 81 is installed on the sliding plate 84, and the output end passes through the sliding plate 84 and communicates with the vent 86. When the ion fan 81 is not needed, the ion fan 81 can be manually pushed along the sliding groove 85 through the sliding plate 84 to a position away from the vent 86, so that the sliding plate 84 covers the vent 86 to ensure airtightness. A sealing strip can be set in the sliding groove 85 to further improve the airtightness.

[0057] Reference Figure 7As shown, a drive unit 87 can be installed on the cover plate 21. The output end of the drive unit 87 is connected to the sliding plate 84 and electrically connected to the sensing element 83. The drive unit 87 can be an electric cylinder, a pneumatic cylinder, or an electric push rod. After receiving a leakage signal from the sensing element 83, the output end of the drive unit 87 drives the sliding plate 84 to move along the sliding groove 85, so that the sliding plate 84 drives the ion fan 81 to the position of the vent 86. The sensing element 83 controls the ion fan 81 to turn on. After the static electricity is eliminated, the drive unit 87 drives the sliding plate 84 to move along the sliding groove 85, so that the sliding plate 84 drives the ion fan 81 away from the vent 86 and covers the vent 86 to provide a shielding seal. Through the cooperation of the drive unit 87 and the sensing element 83, the opening and closing of the ion fan 81 and the vent 86 are automatically controlled, ensuring airtightness while providing static electricity removal.

[0058] The implementation principle of Embodiment 2 of this application includes: when leakage occurs, the sensing element 83 senses the leakage and transmits an electrical signal to the ion fan 81, and controls the ion fan 81 to turn on. After the ion fan 81 blows the charged airflow to neutralize the static electricity, the airflow is discharged through the flow element 82.

[0059] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A harmless grounding protection structure, characterized in that, It includes a bottom shell (1), a top cover (2), conductive elements (3), connecting elements (4), and a grounding mechanism (7); the top cover (2) and the bottom shell (1) together form an installation cavity (5); the bottom shell (1) includes a bottom plate (11), a first side plate (12), and a second side plate (13); two first side plates (12) are arranged opposite each other, and two second side plates (13) are arranged opposite each other, and the height of the first side plate (12) is higher than that of the second side plate (13); the conductive elements (3) are provided on one side of each of the two first side plates (12) in opposite directions; the top cover (2) has a U-shaped cross-section. Includes a cover plate (21) and two oppositely arranged fitting plates (22). After the upper cover (2) covers the bottom shell (1), the fitting plate (22) abuts against the second side plate (13). The connector (4) passes through the first side plate (12) and engages with the fitting plate (22) to lock the upper cover (2) and the bottom shell (1). The grounding mechanism (7) is installed on the upper cover (2) and is connected to the internal equipment and the external grounding point. When the circuit is energized, the current in the upper cover (2) and the bottom shell (1) is grounded through the grounding mechanism (7) by the conductive element (3). The connection point between the cover plate (21) and the fitting plate (22) is provided with a wiring groove (23), and the grounding mechanism (7) is engaged with the upper cover (2) through the wiring groove (23); The first side plate (12) has a through hole for the connector (4) to pass through, and the groove of the wiring groove (23) has an internal thread. The connector (4) passes through the through hole and is screwed to the top cover (2) through the internal thread. The conductive component (3) is made of conductive cotton; The grounding mechanism (7) includes a power line (71), a grounding bolt (72), a grounding plate (73), a grounding nut (74), and a connector (75); the grounding bolt (72) is slidably connected to the wiring groove (23); the grounding plate (73) is sleeved on the grounding bolt (72); the connector (75) is connected to the grounding plate (73) through the power line (71), and there are three connectors (75), and three corresponding power lines (71) are provided. The three power lines (71) are respectively the live wire, the neutral wire, and the ground wire. The connectors (75) corresponding to the live wire and the neutral wire are plugged into the internal equipment, and the connectors (75) corresponding to the ground wire are connected to the external grounding point; the grounding nut (74) is screwed to the grounding bolt (72).

2. The harmless grounding protection structure according to claim 1, characterized in that, A sealing element (6) is provided between the second side plate (13) and the mating plate (22).

3. The harmless grounding protection structure according to claim 1, characterized in that, It also includes an antistatic mechanism (8), which is installed on the cover plate (21) and includes an ion fan (81), a flow element (82) and a sensing element (83); the ion fan (81) is installed on the cover plate (21) and the output end of the ion fan (81) passes through the cover plate (21) and blows charged airflow into the mounting cavity (5); the flow element (82) is installed on the bottom shell (1) and communicates with the mounting cavity (5); the sensing element (83) is connected to the cover plate (21) and is electrically connected to the ion fan (81).

4. The harmless grounding protection structure according to claim 3, characterized in that, The flow element (82) may be a one-way valve.

5. The harmless grounding protection structure according to claim 3, characterized in that, The cover plate (21) is also provided with a sliding plate (84), and the cover plate (21) has a sliding groove (85) and a vent (86) on a plane away from the bottom shell (1). The sliding plate (84) is slidably connected to the cover plate (21) through the sliding groove (85), and the sliding plate (84) controls the opening and closing of the vent (86) during the sliding process. The ion fan (81) is installed on the sliding plate (84), and the output end passes through the sliding plate (84) and communicates with the vent (86).

6. The harmless grounding protection structure according to claim 5, characterized in that, A drive unit (87) is provided on the cover plate (21). The output end of the drive unit (87) is connected to the sliding plate (84) and electrically connected to the sensing element (83).

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