Anti-electromagnetic interference box body

Abstract

The invention relates to the field of anti-electromagnetic technology, in particular to an anti-electromagnetic interference box body which comprises an anti-electromagnetic box body, a fixing frame arranged on one side of the anti-electromagnetic box body and a box door arranged on the outer side of the fixing frame and matched with the anti-electromagnetic box body, and the center of the inner side of the anti-electromagnetic box body is filled with a shielding plate. One side of the anti-electromagnetic box body is connected with a concentric-square-shaped electromagnetic shielding plate, one side of the concentric-square-shaped electromagnetic shielding plate is connected with a box door through a fixing frame, the fixing frame is of a concentric-square-shaped structure, an inner lining plate of the concentric-square-shaped structure is fixedly installed in the side, close to the concentric-square-shaped electromagnetic shielding plate, of the fixing frame, and the inner lining plate and the box door are matched and attached to each other. And a rotating shaft is rotationally connected to one side of the lining plate on the fixing frame. The movable shielding plate in the inner lining plate is unfolded through rotary closing of the box door, the movable shielding plate in the inner lining plate is retracted through rotary opening of the box door, back-and-forth switching is stable, the supporting plate and the connecting plate in the fixing frame operate stably and smoothly, and structural connection is stable and ingenious.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic protection technology, and in particular to an electromagnetic interference protection box. Background Art

[0002] At present, the signal transmission between various electronic devices tends to develop in the wireless direction, such as mobile phones, tablet devices, watches, etc. In order to ensure that various electronic devices have good various wireless signal transmission functions, it is necessary to test the transmission function of the product during the product development and manufacturing stage. In order to improve the accuracy of the test results and not be affected by other external signal test environments, the product to be tested needs to be placed in a signal shielding device. The shielding box, as a signal shielding device, can effectively suppress the electromagnetic environment in the box through the shell and cover made of special materials, thereby improving the accuracy of the test results of the product to be tested.

[0003] At present, when testing or operating multiple groups of equipment, an inner sealed box is generally used for electromagnetic protection. The inner sealed box has a large gap between the box door and the box body, which will reduce the internal shielding effect of the electromagnetic interference protection box. Once the diameter of the box door is reduced, although the shielding plate of the box door will overlap with the shielding plate inside the box, achieving a strong electromagnetic interference protection effect, it will affect the operator's operating space inside the box, causing inconvenience to the maintenance of the box itself or the operation of the internal equipment to be tested, low operating efficiency, or even inability to operate due to space obstruction. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides an electromagnetic interference protection box.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising an electromagnetic shielding box, a fixing frame arranged on one side of the electromagnetic shielding box, and a box door whose outer side of the fixing frame matches the electromagnetic shielding box, the inner center of the electromagnetic shielding box is filled with a shielding plate, one side of the electromagnetic shielding box is connected with a round electromagnetic shielding plate, one side of the round electromagnetic shielding plate is connected with the box door through the fixing frame, the fixing frame is a round structure, an inner lining plate of a round structure is fixedly installed inside the fixing frame on one side close to the round electromagnetic shielding plate, the inner lining plate and the box door match and fit each other, a rotating shaft is rotatably connected on one side of the inner lining plate on the fixing frame, one end of the box door is connected to the fixing frame through the rotating shaft, the box door is also filled with a shielding plate, a first hole is opened on the inner lining plate at the center of one side of the rotating shaft, a first shielding plate is movably arranged on the inner lining plate in the first hole, a side component for moving the first shielding plate is arranged inside the fixing frame, and the side component includes: A driving gear fixedly mounted at both ends of the rotating shaft, and the driving gear movably mounted on both ends of the inner side of the fixing frame, a support plate movably mounted on one side of the top of the fixing frame, a connecting plate movably mounted on one side of the bottom of the fixing frame, a driven gear meshingly connected with the driving gear on one side of the top of the rotating shaft, a driving rack plate meshingly connected with the driving gear and the driven gear is respectively mounted on one side of the supporting plate and the connecting plate, a supporting rod is fixedly mounted on one end of the supporting plate by bolts, and the bottom end of the supporting plate is fixedly mounted on one side of the top of the first shielding plate by bolts; a first rack plate fixedly mounted on the other end of the support plate, one side of the first rack plate being meshedly connected with a first gear, the other side of the first gear being meshedly connected with a driving rack plate, a driving rod being fixedly mounted on the bottom of the driving rack plate by bolts, a second hole being opened on the inner lining plate at the center of a side away from the rotating shaft, and a second shielding plate being movably arranged on the inner lining plate in the second hole; A second rack plate is fixedly installed on one side of the support plate and the connecting plate, one side of the second rack plate is meshedly connected with a lifting gear, a first screw is fixedly installed at the center of the lifting gear located on one side of the connecting plate, a second screw is fixedly installed at the center of the lifting gear located on one side of the support plate, a lower shielding plate is movably provided on one side of the first screw, and an upper shielding plate is movably provided on one side of the second screw.

[0006] As a preferred technical solution of the present invention, a limiting base is fixedly installed at the center of the upper and lower sides inside the fixing frame by screws, a limiting slide groove is provided at the center of one side of the limiting base, and the limiting base is slidably connected to a limiting slider in the limiting slide groove, and the top side of the limiting slider is fixedly installed on the center of one side of the support plate and the connecting plate by bolts.

[0007] One end of the bottom of the driving rod is fixedly mounted on the top of the second shielding plate movable in the second hole by bolts, a first rotating rod is fixedly mounted at the center of the first gear, and both ends of the first rotating rod are connected to the fixing frame by bearings.

[0008] As a preferred technical solution of the present invention, a connecting rod is threadedly connected on the first screw rod, and the other end of the connecting rod is fixedly installed at the center of one side of the lower shielding plate by bolts; a supporting rod is threadedly connected on the second screw rod, and the other side of the supporting rod is fixedly installed at the center of one side of the upper shielding plate by bolts; both ends of the first screw rod and the second screw rod are fixedly installed on the central movable part of the bearings on both sides of the fixing frame by bolts, and the connecting rod and the support rod are both movable at the upper and lower ends of the fixing frame.

[0009] The inner lining plate is provided with fixing holes at the centers of the upper and lower ends. The upper shielding plate and the lower shielding plate are of the same size, and one end of the upper shielding plate and the lower shielding plate are movable through the fixing holes.

[0010] As a preferred technical solution of the present invention, the outer periphery of the circular electromagnetic shielding plate is fitted with the outer side of the anti-electromagnetic box body, the inner periphery of the circular electromagnetic shielding plate is fitted with the inner side of the inner lining plate, transport handles are fixedly installed on both sides of the outside of the anti-electromagnetic box body by bolts, a U-shaped handle is fixedly installed at the center of one side of the outside of the box door by bolts, and the box door is movable on the outer side of the inner lining plate.

[0011] As a preferred technical solution of the present invention, the inner layers of the first shielding plate, the second shielding plate, the upper shielding plate and the lower shielding plate are all filled with shielding plates with anti-electromagnetic structures, the two sides of the first shielding plate and the second shielding plate are movable against the two sides of the upper shielding plate and the lower shielding plate, and the driven gear moves in the fixed frame through a support shaft.

[0012] Compared with the prior art, the present invention can achieve the following beneficial effects: The rotation of the box door drives the driving gear on the rotating shaft and the driven gear on the top side to achieve meshing drive for the support plate and the connecting plate. The meshing between the gear and the rack is stable, and the rotational motion connection is stable. The rotation of the box door drives the first shielding plate, the second shielding plate, and the upper and lower shielding plates to unfold in the inner lining plate, thereby improving the anti-electromagnetic interference effect of the gap at the connection on both sides of the box door.

[0013] The driven gear is driven by the driving gear, and the driven gear at the top and the driving gear at the bottom are respectively meshed with the active rack plate, driving the support plate and the connecting plate to drive the lifting gear to perform stable rotational motion. During the rotation process, the screw on the lifting gear drives the upper and lower shielding plates to be ejected from the fixed holes through the support rod and the connecting rod, thereby enhancing the anti-electromagnetic interference effect on the gap at the connection between the upper and lower sides of the box.

[0014] The electromagnetic interference protection effect for the internal equipment is achieved through the round electromagnetic shielding plate, the anti-electromagnetic box and the box door outside the inner lining plate. At the same time, the movable shielding plates around the inner lining plate protrude when the box door is closed. The shielding plates on the inner lining plate are used to expand the shielding of the box door gap, thereby improving the shielding effect. The structure is simple and stable.

[0015] The active gear on the rotating shaft is driven to rotate by rotating the box door, and the active gear similarly drives the first shielding plate and the second shielding plate in the first hole and the second hole to enter the inner lining plate, and the upper and lower shielding plates enter the fixed holes at the same time. The opening of the box door does not affect the space occupied by the inner lining plate, which is convenient for operation inside the anti-electromagnetic box and has strong practical performance.

[0016] The movable shielding plate in the inner lining plate is unfolded by rotating and closing the box door, and is retracted by rotating and opening the box door. The switching back and forth is stable, the support plate and the connecting plate in the fixed frame run stably and smoothly, and the structural connection is stable and ingenious. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the internal structure of the middle fixing frame; Figure 3 For the present invention Figure 2 Schematic diagram of the connection structure of the middle lining plate; Figure 4 For the present invention Figure 2 Schematic diagram of the connection structure of the middle support plate; Figure 5 For the present invention Figure 2 Schematic diagram of the connection structure of the middle connecting plate; Figure 6 For the present invention Figure 3 Schematic diagram of the connection structure of the middle limit base; Figure 7 It is a schematic diagram of the structure of the circular electromagnetic shielding plate of the present invention; Figure 8 For the present invention Figure 3 Schematic diagram of the connection structure of the middle and lower shielding plates; Fig. 9 For the present invention Figure 6 Schematic diagram of the internal structure of the middle limit base.

[0018] Among them: 10, anti-electromagnetic box; 11, box door; 12, circular electromagnetic shielding plate; 13, rotating shaft; 14, second hole; 15, second shielding plate; 16, transportation handle; 17, U-shaped handle; 20, fixing frame; 21, driving gear; 22, driven gear; 23, driving rack plate; 24, second rack plate; 25, lifting gear; 26, supporting shaft; 30, lining plate; 31, first hole; 32, first shielding plate; 33, fixing hole; 40, supporting plate; 41, supporting rod; 42, first rack plate; 43, first gear; 44, driving rack plate; 45, driving rod; 46, second screw; 47, upper shielding plate; 48, first rotating rod; 50, connecting plate; 51, first screw; 52, lower shielding plate; 53, connecting rod; 60, limiting base; 61, limiting slide groove; 62, limiting slider. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0020] Embodiment: Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Fig. 9 As shown, it includes an electromagnetic shielding box 10, a fixing frame 20 arranged on one side of the electromagnetic shielding box 10, and a box door 11 on the outside of the fixing frame 20 that matches the electromagnetic shielding box 10. The inner center of the electromagnetic shielding box 10 is filled with a shielding plate. A side of the electromagnetic shielding box 10 is connected to a round electromagnetic shielding plate 12. One side of the round electromagnetic shielding plate 12 is connected to the box door 11 through the fixing frame 20. The fixing frame 20 is a round structure. A round inner lining plate 30 is fixedly installed on the fixing frame 20 on one side close to the round electromagnetic shielding plate 12. The inner lining plate 30 matches the box door 11. The inner lining plate 30 and the box door 11 are used to achieve the structural stability of the inner sealed box body. The inner lining plate 30 is used to block. The fixed frame 20 is rotatably connected with a rotating shaft 13 on one side of the inner lining plate 30. One end of the box door 11 is connected to the fixed frame 20 through the rotating shaft 13. The box door 11 is also filled with a shielding plate. A first hole 31 is opened on the inner lining plate 30 at the center of one side of the rotating shaft 13. A first shielding plate 32 is movably arranged in the first hole 31 on the inner lining plate 30. A side component for moving the first shielding plate 32 is arranged inside the fixed frame 20. The side component includes: A driving gear 21 is fixedly mounted at both ends of the rotating shaft 13, and the driving gear 21 is movable on both ends of the interior of the fixing frame 20. A support plate 40 is movably arranged on one side of the top of the fixing frame 20, and a connecting plate 50 is movably arranged on one side of the bottom of the fixing frame 20. The driving gear 21 is meshedly connected with a driven gear 22 on one side of the top of the rotating shaft 13. One side of the supporting plate 40 and the connecting plate 50 are respectively provided with a driving rack plate 23 meshedly connected with the driving gear 21 and the driven gear 22, so as to realize the rotary meshing movement of opening and closing the door. A support rod 41 is fixedly mounted on one end of the supporting plate 40 by bolts, and the bottom end of the supporting plate 40 is fixedly mounted on one side of the top of the first shielding plate 32 by bolts; A first rack plate 42 is fixedly mounted on the other end of the support plate 40, one side of the first rack plate 42 is meshedly connected with a first gear 43, the other side of the first gear 43 is meshedly connected with a driving rack plate 44, a driving rod 45 is fixedly mounted on the bottom of the driving rack plate 44 by bolts, a second hole 14 is opened on the inner lining plate 30 at the center of a side away from the rotating shaft 13, a second shielding plate 15 is movably arranged in the second hole 14 on the inner lining plate 30, and a shielding plate is added at the closed gap; A second rack plate 24 is fixedly mounted on one side of the support plate 40 and the connecting plate 50, and a lifting gear 25 is meshedly connected to one side of the second rack plate 24. A first screw 51 is fixedly mounted at the center of the lifting gear 25 on one side of the connecting plate 50, and a second screw 46 is fixedly mounted at the center of the lifting gear 25 on one side of the support plate 40. A lower shielding plate 52 is movably mounted on one side of the first screw 51, and an upper shielding plate 47 is movably mounted on one side of the second screw 46. The shielding plate is driven to move up and down by the rotation of the screw, and the structure is simple and stable.

[0021] See also Figure 3 , Figure 7 and Figure 8 A limit base 60 is fixedly installed at the center of the upper and lower sides of the fixing frame 20 by screws, and a limit slide groove 61 is provided at the center of one side of the limit base 60. The limit base 60 is slidably connected to a limit slider 62 in the limit slide groove 61, and the top side of the limit slider 62 is fixedly installed on the center of one side of the support plate 40 and the connecting plate 50 by bolts, so that the support plate 40 and the connecting plate 50 can move back and forth stably in the limit base 60.

[0022] One end of the bottom of the driving rod 45 is fixedly installed on the top of the second shielding plate 15 movable in the second hole 14 by bolts, and a first rotating rod 48 is fixedly installed at the center of the first gear 43. Both ends of the first rotating rod 48 are connected to the fixing frame 20 through bearings, so that the rotation transmission of the first gear 43 is stable and smooth.

[0023] See also Figure 3 , Figure 4 and Figure 5 A connecting rod 53 is threadedly connected to the first screw rod 51, and the other end of the connecting rod 53 is fixedly installed at the center of one side of the lower shielding plate 52 by bolts. A supporting rod 41 is threadedly connected to the second screw rod 46, and the other side of the supporting rod 41 is fixedly installed at the center of one side of the upper shielding plate 47 by bolts. Both ends of the first screw 51 and the second screw 46 are fixedly installed at the central movable part of the bearings on both sides of the fixing frame 20 by bolts. The connecting rod 53 and the supporting rod 41 are movable at the upper and lower ends of the fixing frame 20, driving the shielding plates on both sides to move symmetrically relative to or oppositely, so that they are expanded during closing and retracted during opening.

[0024] Fixing holes 33 are provided at the centers of the upper and lower ends of the inner lining plate 30. The upper shielding plate 47 and the lower shielding plate 52 are of the same size, and one end of the upper shielding plate 47 and the lower shielding plate 52 are movable through the fixing holes 33 to achieve stable penetrating movement.

[0025] See also Figure 1 and Fig. 9 The outer periphery of the circular electromagnetic shielding plate 12 fits with the outer side of the anti-electromagnetic box 10, and the inner periphery of the circular electromagnetic shielding plate 12 fits with the inner side of the inner lining plate 30. Transport handles are fixedly installed on both sides of the outside of the anti-electromagnetic box 10 by bolts. A U-shaped handle is fixedly installed at the center of the outer side of the box door 11 by bolts, and the box door 11 is movable on the outer side of the inner lining plate 30 to achieve inner closure.

[0026] See also Figure 2 , Figure 6 and Figure 7 The inner layers of the first shielding plate 32, the second shielding plate 15, the upper shielding plate 47 and the lower shielding plate 52 are all filled with shielding plates with anti-electromagnetic structures. The two sides of the first shielding plate 32 and the second shielding plate 15 are movable against the two sides of the upper shielding plate 47 and the lower shielding plate 52. Shielding plates are added around the inner side of the ring-shaped electromagnetic shielding plate 12 and between the box door 11, and shielding plates are added to the gaps around the four sides to improve the interior of the anti-electromagnetic box body 10. The driven gear 22 moves in the fixed frame 20 through the support shaft 26 to achieve stable rotational engagement of the driven gear 22.

[0027] Working principle: When the box door 11 is closed, the closing drives the rotating shaft 13 to rotate, the driving gears 21 at both ends of the rotating shaft 13 rotate, and the driving gear 21 at the top engages to drive the driven gear 22 to rotate in the opposite direction. During the rotation of the driving gear 21, the meshing active rack plate 23 drives the support plate 40 to push on the limiting base 60, so that the first shielding plate 32 in the first hole 31 is ejected, and at the same time, the support plate 40 drives the first gear 43 to rotate through the meshing of the first rack plate 42 during the pushing, and the meshing of the first gear 43 drives the driving rack plate 44 to move in the opposite direction to the support plate 40, so that the driving rod 45 under the driving rack plate 44 drives the second shielding plate 32 in the second hole 14. The plate 15 is also ejected synchronously, and the connecting plate 50 and the supporting plate 40 realize back and forth movement under the meshing drive of the driving gear 21. The second rack plate 24 of the connecting plate 50 and the supporting plate 40 will drive the lifting gear 25 to rotate during the back and forth movement. The lifting gear 25 rotates and drives the support rod 41 and the connecting rod 53 on the first screw 51 and the second screw 46 to push the lower shielding plate 52 and the upper shielding plate 47, so that the upper and lower shielding plates 52 are ejected from the fixed holes 33. At this time, after the box door 11 is closed, the box door 11, the circular anti-magnetic shielding plate and the surrounding shielding plates are overlapped to enhance the anti-magnetic interference effect, and at the same time, the diameter of the box body will not be reduced, so that the internal operating space will not be affected; When the box door 11 is opened, the driving gear 21 on the rotating shaft 13 cooperates with the driven gear 22 to move the support plate 40 and the connecting plate 50 in the opposite direction, so that the first shielding plate 32 and the second shielding plate 15 in the first hole 31 and the second hole 14 are retracted, and at the same time, the first screw 51 and the second screw 46 are reversed to achieve the upper shielding plate 47 and the lower shielding plate 52 to descend in the fixed hole 33, so that the surrounding shielding plates enter the inner lining plate 30, avoiding obstruction of internal operations when opening the box.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An electromagnetic interference protection box, comprising an electromagnetic interference protection box (10), a fixing frame (20) arranged on one side of the electromagnetic interference protection box (10), and a box door (11) on the outer side of the fixing frame (20) and matching with the electromagnetic interference protection box (10), characterized in that: The center of the inner side of the electromagnetic shielding box (10) is filled with a shielding plate, one side of the electromagnetic shielding box (10) is connected to a round electromagnetic shielding plate (12), one side of the round electromagnetic shielding plate (12) is connected to the box door (11) via the fixing frame (20), the fixing frame (20) is a round structure, and a round inner lining plate (30) is fixedly installed on the fixing frame (20) on the inner side close to the round electromagnetic shielding plate (12), the inner lining plate (30) and the box door (11) are matched and fit with each other, and the fixing frame (20) is connected to the inner lining plate (30) on the fixing frame (20). One side of the lining plate (30) is rotatably connected to a rotating shaft (13); one end of the box door (11) is connected to the fixing frame (20) via the rotating shaft (13); a shielding plate is also filled in the box door (11); a first hole (31) is provided on the inner lining plate (30) at the center of one side of the rotating shaft (13); a first shielding plate (32) is movably arranged in the first hole (31) on the inner lining plate (30); a side component for moving the first shielding plate (32) is arranged inside the fixing frame (20); the side component comprises: A driving gear (21) is fixedly mounted on both ends of the rotating shaft (13), and the driving gear (21) is movable on both ends inside the fixing frame (20); a support plate (40) is movably arranged on one side of the top of the fixing frame (20), and a connecting plate (50) is movably arranged on one side of the bottom of the fixing frame (20); the driving gear (21) is meshedly connected with a driven gear (22) on one side of the top of the rotating shaft (13); one side of the supporting plate (40) and the connecting plate (50) are respectively provided with a driving rack plate (23) meshedly connected with the driving gear (21) and the driven gear (22); a support rod (41) is fixedly mounted on one end of the supporting plate (40) by means of bolts, and the bottom end of the supporting plate (40) is fixedly mounted on one side of the top of the first shielding plate (32) by means of bolts; a first rack plate (42) fixedly mounted on the other end of the support plate (40), one side of the first rack plate (42) being meshedly connected to a first gear (43), the other side of the first gear (43) being meshedly connected to a driving rack plate (44), a driving rod (45) being fixedly mounted on the bottom of the driving rack plate (44) by means of bolts, a second hole (14) being opened on the inner lining plate (30) at the center of a side away from the rotating shaft (13), and a second shielding plate (15) being movably arranged in the second hole (14) on the inner lining plate (30); A second rack plate (24) is fixedly mounted on one side of the support plate (40) and the connecting plate (50); one side of the second rack plate (24) is meshingly connected with a lifting gear (25); a first screw rod (51) is fixedly mounted at the center of the lifting gear (25) located on one side of the connecting plate (50); a second screw rod (46) is fixedly mounted at the center of the lifting gear (25) located on one side of the support plate (40); a lower shielding plate (52) is movably mounted on one side of the first screw rod (51); and an upper shielding plate (47) is movably mounted on one side of the second screw rod (46).

2. The electromagnetic interference protection box according to claim 1, characterized in that: A limiting base (60) is fixedly mounted at the center of both upper and lower sides of the fixing frame (20) by means of screws, a limiting sliding groove (61) is provided at the center of one side of the limiting base (60), a limiting sliding block (62) is slidably connected to the limiting base (60) in the limiting sliding groove (61), and a top side of the limiting sliding block (62) is fixedly mounted at the center of one side of the supporting plate (40) and the connecting plate (50) by means of bolts.

3. The electromagnetic interference protection box according to claim 1, characterized in that: One end of the bottom of the driving rod (45) is fixedly mounted on the top of the second shielding plate (15) movable in the second hole (14) by means of bolts, and a first rotating rod (48) is fixedly mounted at the center of the first gear (43), with both ends of the first rotating rod (48) being connected to the fixing frame (20) by means of bearings.

4. The electromagnetic interference protection box according to claim 1, characterized in that: A connecting rod (53) is threadedly connected to the first screw rod (51), and the other end of the connecting rod (53) is fixedly mounted at the center of one side of the lower shielding plate (52) by means of bolts. A supporting rod (41) is threadedly connected to the second screw rod (46), and the other end of the supporting rod (41) is fixedly mounted at the center of one side of the upper shielding plate (47) by means of bolts.

5. The electromagnetic interference protection box according to claim 4, characterized in that: The inner lining plate (30) is provided with fixing holes (33) at the centre of both upper and lower ends, the upper shielding plate (47) and the lower shielding plate (52) are of the same size, and one end of the upper shielding plate (47) and the lower shielding plate (52) are movably inserted into the fixing holes (33).

6. The electromagnetic interference protection box according to claim 1, characterized in that: The outer periphery of the circular electromagnetic shielding plate (12) fits with the outer side of the electromagnetic protection box (10), and the inner periphery of the circular electromagnetic shielding plate (12) fits with the inner side of the inner lining plate (30). Transport handles (16) are fixedly installed on both sides of the outside of the electromagnetic protection box (10) by bolts. A U-shaped handle (17) is fixedly installed at the center of one side of the outside of the box door (11) by bolts, and the box door (11) is movable on the outer side of the inner lining plate (30).

7. The electromagnetic interference protection box according to claim 4, characterized in that: Both ends of the first screw rod (51) and the second screw rod (46) are fixedly mounted on the central movable part of the bearings on both sides inside the fixing frame (20) by means of bolts, and the connecting rod (53) and the supporting rod (41) are both movable at the upper and lower ends of the fixing frame (20).

8. The electromagnetic interference protection box according to claim 1, characterized in that: The inner layers of the first shielding plate (32), the second shielding plate (15), the upper shielding plate (47) and the lower shielding plate (52) are all filled with shielding plates with an anti-electromagnetic structure, the two sides of the first shielding plate (32) and the second shielding plate (15) are movable against the two sides of the upper shielding plate (47) and the lower shielding plate (52), and the driven gear (22) moves in the fixing frame (20) via a support shaft (26).

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