An isolation protective cover for EMC electromagnetic compatibility testing

Abstract

This utility model discloses an isolation shield for EMC electromagnetic compatibility testing, applied in the field of electronic engineering technology. This utility model supports quick one-handed closing and opening, eliminating the cumbersome steps of traditional bolt fixing or tool operation. An automatic locking mechanism ensures a tight seal when closed, avoiding the risk of electromagnetic leakage caused by uneven manual tightening. This structure balances ease of operation and shielding stability, making it particularly suitable for high-frequency, multi-scenario testing needs. It reduces equipment adjustment time while ensuring the accuracy of test results. It can fix the device under test in a shielded environment, eliminating the need for external clamp installation steps and simplifying the testing process. Its clamping mechanism is adaptable to devices of different sizes, ensuring stable contact and reducing the risk of signal interference or shielding failure caused by equipment displacement. It also avoids the electromagnetic leakage hazards caused by frequent opening and adjusting of the shield, significantly improving testing efficiency and result consistency.

Description

Technical Field

[0001] This utility model belongs to the field of electronic engineering technology, and specifically relates to an isolation protective cover for EMC electromagnetic compatibility testing. Background Technology

[0002] Electromagnetic compatibility (EMC) refers to the ability of a device or system to operate within its electromagnetic environment without causing unacceptable electromagnetic interference to any other device in that environment. Therefore, EMC includes two requirements: firstly, the electromagnetic interference generated by the device during normal operation must not exceed certain limits; secondly, the device must have a certain degree of immunity to electromagnetic interference in its environment, i.e., electromagnetic susceptibility. EMC testing isolation covers are designed to facilitate EMC testing. However, traditional EMC testing isolation covers often lack quick-opening and automatic locking functions, typically requiring bolt fixing or manual locking mechanisms. This process is cumbersome and time-consuming. When closing, repeated adjustments to the seam alignment are necessary, and manual locking force is difficult to control evenly, easily leading to poor contact of the shielding layer and potential electromagnetic leakage. Frequent disassembly and assembly can cause thread wear or buckle deformation, increasing maintenance costs. Furthermore, traditional EMC testing isolation covers often lack built-in device clamping functions, requiring external clamps to fix the device under test, which is also complex and time-consuming. To address the problems mentioned above, we propose an EMC testing isolation cover. Utility Model Content

[0003] The purpose of this invention is to provide an isolation protective cover for EMC electromagnetic compatibility testing, which has the advantages of quick closing and opening and convenient clamping.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an isolation protective cover for EMC electromagnetic compatibility testing, including a base, a shielding cover rotatably connected to the right side of the top of the base via a hinge, a connecting plate bolted to the left side of the shielding cover, limiting plates bolted to both sides of the top of the connecting plate, limiting grooves formed at the top and bottom of both sides of the limiting plate, a locking rod slidably sleeved inside the limiting groove at one end, a spring bolted to the right side of the two locking rods facing each other near the middle, a card box bolted to the left side of the top of the base, a card slot formed at the front and rear ends of the right side and the top right side of the card box, and the bottom of the two card slots facing away from each other engaging with the left edge of the two locking rods facing away from each other, and a clamping mechanism provided in the middle of the top of the base.

[0005] The above technical solution involves: pinching the two levers and moving them inwards, causing the lever to move inwards as well. The lever loses its engagement with the slot, and the lever causes the spring to contract. The limiting groove inside the limiting plate limits the movement of the lever. Flipping it to the right opens the shielding cover, and the spring returns the mechanism to its original position. To close the shielding cover, flip it to the left, causing the lever to contact the ramp at the top of the slot. The lever moves inwards along the ramp, causing the spring to contract. When the lever reaches the bottom of the ramp, the spring returns, and the lever engages with the slot. This allows for quick one-handed opening and closing, eliminating the cumbersome steps of traditional bolt fixing or tool operation. An automatic locking mechanism ensures a tight seal, preventing electromagnetic leakage risks caused by uneven manual tightening. This structure balances ease of operation with shielding stability, making it particularly suitable for high-frequency, multi-scenario testing needs, reducing equipment adjustment time while ensuring accurate test results.

[0006] The present invention is further configured such that the clamping mechanism includes a clamping box, the clamping box is bolted to the middle of the top of the base, a fixing block is bolted to the center of the bottom inside the clamping box, a screw is rotatably sleeved through the inside of the fixing block, and the right side of the screw surface away from the middle passes through the right side of the clamping box and is rotatably sleeved, the left side of the screw surface away from the middle and the right side of the screw surface close to the middle are threadedly connected to the screw sleeves, and a clamping block is bolted to the top of the opposite side of the two screw sleeves.

[0007] The above technical solution employs a clamping mechanism. By gripping and rotating the handle, the screw rotates, and the fixing block stabilizes the screw. The rotation of the screw causes the threaded sleeve to move. The screw is designed with bidirectional threads on both sides, and the threaded sleeves on both sides move inward. The movement of the threaded sleeves causes the clamping block to hold the device under test. This allows for the fixation of the device under test in a shielded environment, eliminating the need for external fixture installation steps, simplifying the testing process. The clamping mechanism is adaptable to devices of different sizes, ensuring stable contact and reducing the risk of signal interference or shielding failure caused by device displacement. It also avoids the electromagnetic leakage hazards caused by frequent opening and adjusting of the shield, significantly improving testing efficiency and result consistency.

[0008] The present invention is further configured such that a slider is bolted to the front end and the rear end of the screw sleeve, and sliding grooves are provided on both sides of the front end and the rear end inside the clamp box, and the inside of the sliding grooves is slidably connected to the surface of the slider.

[0009] The above technical solution uses a slider and a groove to limit the movement of the threaded sleeve.

[0010] The present invention is further configured such that the top of the two slots on the opposite side is set as a ramp.

[0011] The above technical solution is adopted: by setting it as a ramp, the clamp can move inward along the path of the ramp and then engage with the clamp slot.

[0012] The present invention is further configured such that both sides of the screw surface are provided with bidirectional threads.

[0013] By adopting the above technical solution, the two threaded sleeves can be moved in opposite directions by setting them to bidirectional threads.

[0014] The present invention is further configured such that a limit block is fixedly sleeved on the right side of the lever.

[0015] The above technical solution, by setting a limit block, can prevent the lever from detaching.

[0016] The present invention is further configured such that a grip is bolted to the middle of the opposite sides of the two clamps.

[0017] The above technical solution allows for easy movement of the lever by incorporating a grip.

[0018] The present invention is further configured such that a crank handle is fixedly sleeved on the right side of the screw.

[0019] The above technical solution incorporates a crank handle, which allows for easy rotation of the screw.

[0020] In summary, this utility model has the following beneficial effects:

[0021] 1. This utility model supports quick one-handed closing and opening, eliminating the cumbersome steps of traditional bolt fixing or tool operation. The automatic locking mechanism when closing ensures that the shielding cover is tightly sealed, avoiding the risk of electromagnetic leakage caused by uneven manual tightening force. This structure takes into account both ease of operation and shielding stability, and is especially suitable for high-frequency and multi-scenario testing needs, reducing equipment adjustment time while ensuring the accuracy of test results.

[0022] 2. This utility model can fix the device under test in a shielded environment, eliminating the need for external fixture installation steps, simplifying the testing process. Its clamping mechanism is compatible with devices of different sizes, ensuring stable contact and reducing the risk of signal interference or shielding failure caused by device displacement. At the same time, it avoids the electromagnetic leakage hazards caused by frequent opening and adjusting of the cover, significantly improving testing efficiency and result consistency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a top view of the overall structure of this utility model;

[0025] Figure 3 This is a top sectional view of a partial structure of this utility model;

[0026] Figure 4 This is a partial structural side sectional view of the present invention;

[0027] Figure 5 This is a top sectional view of the clamping mechanism of this utility model.

[0028] Reference numerals in the attached diagram: 1. Base; 2. Shielding cover; 3. Connecting plate; 4. Limiting plate; 5. Limiting groove; 6. Locking rod; 7. Spring; 8. Locking box; 9. Locking slot; 10. Clamping box; 11. Fixing block; 12. Screw; 13. Screw sleeve; 14. Clamping block; 15. Sliding block; 16. Sliding groove; 17. Limiting block; 18. Handle; 19. Crank handle. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Example 1: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 An isolation shield for EMC electromagnetic compatibility testing includes a base 1. A shield 2 is rotatably connected to the top right side of the base 1 via a hinge. A connecting plate 3 is bolted to the left side of the shield 2. Limiting plates 4 are bolted to both sides of the top of the connecting plate 3. Limiting grooves 5 are formed on the top and bottom of both sides of the limiting plates 4. A locking rod 6 is slidably sleeved inside one end of the limiting groove 5. A spring 7 is bolted to the right side of the two locking rods 6 facing each other, near the middle. A card box 8 is bolted to the top left side of the base 1. The front and rear ends of the right side and top right side of the card box 8 are provided with locking slots 9. The bottom of the two slots 9 facing away from each other engages with the left edge of the two locking rods 6 facing away from each other. A clamping mechanism is provided in the middle of the top of the base 1. When the two gripping rods 18 are pinched and moved inward, the gripping rods 18 drive the locking rods 6 inward. When the lever 6 moves, it loses engagement with the slot 9. The lever 6 causes the spring 7 to retract, and the limiting groove 5 inside the limiting plate 4 limits the movement of the lever 6. Flipping to the right causes the shielding cover 2 to open, and the spring 7 rebounds, causing the mechanism to return to its original position. When the shielding cover 2 needs to be closed, flip the shielding cover 2 to the left, and the lever 6 contacts the ramp at the top of the slot 9. The lever 6 moves inward along the path of the ramp, and the lever 6 causes the spring 7 to retract. When the lever 6 moves to the bottom of the ramp, the spring 7 rebounds, and the lever 6 engages and is fixed with the slot 9. This supports quick one-handed closing and opening, eliminating the cumbersome steps of traditional bolt fixing or tool operation. The automatic locking mechanism when closing ensures that the shielding cover 2 is tightly sealed, avoiding the risk of electromagnetic leakage caused by uneven manual tightening force. This structure balances ease of operation and shielding stability.

[0031] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 The top of the two slots 9 on the opposite side is set as a ramp. By setting it as a ramp, the lever 6 can move inward along the path of the ramp and then engage with the slot 9.

[0032] refer to Figure 1 , Figure 2 , Figure 3 A limit block 17 is fixedly sleeved on the right side of the locking rod 6. By setting the limit block 17, the locking rod 6 can be prevented from detaching.

[0033] refer to Figure 2 , Figure 3 A handle 18 is bolted to the middle of the two opposing sides of the lever 6. The handle 18 makes it easy to move the lever 6.

[0034] Brief description of usage: When performing EMC electromagnetic compatibility testing on electronic equipment, pinch the two levers 18 and move them inward. The levers 18 drive the locking lever 6 to move inward, disengaging the locking lever 6 from the locking slot 9. The locking lever 6 then causes the spring 7 to retract, and the limiting groove 5 inside the limiting plate 4 limits the movement of the locking lever 6. Flipping it to the right opens the shielding cover 2, and the spring 7 returns the mechanism to its original position. Place the equipment to be tested into the shielding cover 2. Flip the shielding cover 2 to the left, and the locking lever 6 contacts the ramp at the top of the locking slot 9. The locking lever 6 moves along the ramp... As the lever moves radially inward, the locking rod 6 causes the spring 7 to retract. When the locking rod 6 moves to the bottom of the slope, the spring 7 rebounds, and the locking rod 6 engages with the slot 9 for fixation. This allows for quick one-handed closing and opening, eliminating the cumbersome steps of traditional bolt fixing or tool operation. The automatic locking mechanism ensures that the shielding cover 2 fits tightly when closed, avoiding the risk of electromagnetic leakage caused by uneven manual tightening. This structure balances ease of operation with shielding stability, making it particularly suitable for high-frequency, multi-scenario testing needs. It reduces equipment adjustment time while ensuring the accuracy of test results.

[0035] Example 2: Reference Figure 1 , Figure 2 , Figure 5 An isolation shield for EMC electromagnetic compatibility testing includes a clamping mechanism comprising a clamping box 10, which is bolted to the center of the top of a base 1. A fixing block 11 is bolted to the center of the bottom of the clamping box 10. A screw 12 is rotatably sleeved through the interior of the fixing block 11, with the right side of the screw 12 away from the center passing through the right side of the clamping box 10 and rotatably sleeved. Threaded sleeves 13 are threaded to the left side of the screw 12 away from the center and the right side of the screw 12 near the center. A clamping block 14 is bolted to the top of the opposite side of the two threaded sleeves 13. By gripping and rotating a crank 19, the crank 19 drives the screw 12 to rotate, and the fixing block 11 stabilizes the screw 12. The rotation of the screw 12 causes the threaded sleeves 13 to move. The screw 12 is configured with bidirectional threads on both sides, and the threaded sleeves 13 on both sides move inward. The movement of the threaded sleeves 13 causes the clamping block 14 to clamp the device under test. This mechanism can fix the device under test in a shielded environment, eliminating the need for external fixture installation steps and simplifying the testing process. The clamping mechanism is adaptable to devices of different sizes.

[0036] refer to Figure 5The front and rear ends of the threaded sleeve 13 are bolted with sliders 15. The front and rear ends of the clamp box 10 are provided with sliding grooves 16, and the inside of the sliding grooves 16 is slidably connected to the surface of the sliders 15. By setting the sliders 15 and the sliding grooves 16, the movement of the threaded sleeve 13 can be limited.

[0037] refer to Figure 5 The screw 12 has two sides of its surface set with bidirectional threads, which allows the two side sleeves 13 to move in opposite directions.

[0038] refer to Figure 1 , Figure 2 , Figure 5 A crank handle 19 is fixedly sleeved on the right side of the screw 12, which allows the screw 12 to be rotated easily.

[0039] Brief description of usage: After opening the shielding cover 2, hold the crank handle 19 and rotate it. The crank handle 19 drives the screw 12 to rotate, and the fixing block 11 stabilizes the screw 12. The rotation of the screw 12 drives the screw sleeve 13 to move. The slider 15 and the slide groove 16 limit the movement of the screw sleeve 13. The screw 12 is set with a two-way thread on both sides. The screw sleeves 13 on both sides move inward. The movement of the screw sleeves 13 drives the clamping block 14 to clamp the electronic equipment to be tested. It can fix the device under test in a shielded environment, eliminating the need for external fixture installation steps, simplifying the testing process. Its clamping mechanism is compatible with devices of different sizes, ensuring stable contact and reducing the risk of signal interference or shielding failure caused by device displacement. At the same time, it avoids the electromagnetic leakage hazards caused by frequent opening and adjustment of the cover, significantly improving testing efficiency and result consistency.

[0040] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An isolating shield for EMC electromagnetic compatibility tests, comprising a base (1), characterised in that: A shield (2) is rotatably connected to the top right side of the base (1) via a hinge. A connecting plate (3) is bolted to the left side of the shield (2). Limiting plates (4) are bolted to both sides of the top of the connecting plate (3). Limiting grooves (5) are opened at the top and bottom of both sides of the limiting plate (4). A locking rod (6) is slidably sleeved inside the limiting groove (5) at one end. A spring (7) is bolted to the right side of the two locking rods (6) near the middle. A card box (8) is bolted to the top left side of the base (1). Card slots (9) are opened at the front and rear ends of the right side and the top right side of the card box (8). The bottom of the two card slots (9) away from the side is engaged with the left edge of the two locking rods (6) away from the side. A clamping mechanism is provided in the middle of the top of the base (1).

2. A screening enclosure for EMC electromagnetic compatibility testing according to claim 1, characterised in that: The clamping mechanism includes a clamping box (10), which is bolted to the middle of the top of the base (1). A fixing block (11) is bolted to the center of the bottom of the clamping box (10). A screw (12) is inserted through and rotated in the interior of the fixing block (11). The right side of the screw (12) away from the middle passes through the right side of the clamping box (10) and rotates in the clamping box. The left side of the screw (12) away from the middle and the right side of the screw (12) close to the middle are threaded with a screw sleeve (13). A clamping block (14) is bolted to the top of the opposite side of the two screw sleeves (13).

3. The protective shield for EMC electromagnetic compatibility testing according to claim 2, characterized in that: The front and rear ends of the screw sleeve (13) are bolted with sliders (15), and the front and rear ends of the clamp box (10) are provided with sliding grooves (16), and the interior of the sliding grooves (16) is slidably connected to the surface of the sliders (15).

4. The protective shield for EMC electromagnetic compatibility testing according to claim 1, characterized in that: The top of the two slots (9) on the opposite side is set as a ramp.

5. The protective shield for EMC electromagnetic compatibility testing according to claim 2, characterized in that: The screw (12) has bidirectional threads on both sides of its surface.

6. The protective shield for EMC electromagnetic compatibility testing according to claim 1, characterized in that: The right side of the lever (6) is fixedly fitted with a limit block (17).

7. The protective shield for EMC electromagnetic compatibility testing according to claim 1, characterized in that: A grip (18) is bolted to the middle of the opposite side of the two levers (6).

8. The protective shield for EMC electromagnetic compatibility testing according to claim 2, characterized in that: A crank handle (19) is fixedly sleeved on the right side of the screw (12).

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