Device for testing electromagnetic shielding effectiveness of conductive gasket

Abstract

The utility model discloses a conductive gasket electromagnetic shielding effectiveness testing device which comprises a base which is of a square plate structure, and a detection box is fixedly installed on the surface of the base. The device comprises a base, a detection box is installed on the surface of the base, an emitter is installed on the inner bottom face of the detection box, a receiver is installed on the surface of the base, a cutting mechanism is arranged on the surface of the detection box, and the cutting mechanism comprises a plurality of sliding rods fixedly connected to the surface of the detection box, and transverse plates are slidably installed on the surfaces of the sliding rods. According to the electromagnetic shielding effectiveness testing device for the conductive gasket, the cutting mechanism is arranged, the conductive gasket is cut, detection is more accurate, a transverse plate is pressed downwards, the transverse plate pushes the conductive gasket to move into the opening through a rubber block, the opening is blocked, the conductive gasket is fixed, the conductive gasket is cut by the tail end of a blade at the moment, and the electromagnetic shielding effectiveness of the conductive gasket is tested. And the periphery of the opening is blocked by the conductive gasket, so that the conductive gasket is closer to the use form, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of conductive gasket detection, in particular to a test device for electromagnetic shielding effectiveness of conductive gaskets. Background Art

[0002] A conductive gasket, also known as an EMI gasket, is usually filled in the gaps of the chassis of electronic devices, which can maintain the electrical conductivity continuity at the gaps, reduce the contact resistance at holes, gaps, and grooves, thereby reducing the voltage at both ends of the joint and reducing the electromagnetic leakage at the gaps. The existing conductive gasket materials are mainly divided into conductive rubber, metal wire mesh, metal elastic gaskets, and conductive cloth, etc. After the production of conductive gaskets is completed, a test device needs to be used uniformly to sample and detect the conductive gaskets to test the shielding effect of the conductive gaskets. However, when the existing test device is used, the conductive gasket is directly fixed at the opening, completely blocking the opening, which is different from the method of using the conductive gasket. Therefore, the measured shielding effect data of the conductive gasket is not accurate enough and it is more inconvenient to use. Content of the Utility Model

[0003] The purpose of the utility model is to provide a test device for electromagnetic shielding effectiveness of conductive gaskets to solve the problem proposed in the above background art that the conductive gasket is directly fixed at the opening, completely blocking the opening, which is different from the method of using the conductive gasket. Therefore, the measured shielding effect data of the conductive gasket is not accurate enough and it is more inconvenient to use.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A test device for electromagnetic shielding effectiveness of conductive gaskets, including a base which is set as a square plate structure, and a detection box is fixedly installed on the surface of the base;

[0005] A transmitter is installed on the inner bottom surface of the detection box, a receiver is installed on the surface of the base, a cutting mechanism is arranged on the surface of the detection box, and the cutting mechanism includes: A plurality of sliding rods are fixedly connected to the surface of the detection box, and a cross plate is slidably installed on the surface of the sliding rods. A first spring is installed at the bottom of the cross plate, and the end of the first spring is connected to the surface of the detection box. A rubber block is fixedly connected to the bottom of the cross plate. An opening is embedded on the surface of the detection box, and a connecting plate is fixedly connected to the inner wall of the detection box, and multiple sections of blades are fixedly connected to the surface of the connecting plate.

[0006] Preferably, a fixing mechanism is provided on the surface of the cross plate, and the fixing mechanism includes: a first pressing block is arranged around the surface of the cross plate, and a second pressing block is fixedly connected to the surface of the detection box; a plurality of support plates are installed on the surface of the cross plate, and the other end of the support plate is connected to a second spring; the end of the second spring is fixedly connected to a support rod, and the end of the support rod penetrates through the bottom surface of the cross plate; a ball is embedded at the end of the support rod; a rotating block is rotatably installed on the surface of the cross plate, and clamping blocks are symmetrically and fixedly connected to the surface of the rotating block; clamping grooves are embedded on the surface of the symmetrically arranged sliding rods.

[0007] With the above technical solution, the fixing mechanism facilitates the installation of the conductive gasket and reduces the installation wrinkles of the conductive gasket.

[0008] Preferably, the sliding rod is slidably connected to the cross plate, and the rubber block is arranged corresponding to the position of the opening.

[0009] With the above technical solution, press down the cross plate, so that the cross plate slides on the surface of the sliding rod, and the cross plate drives the rubber block to move downward, so that the rubber block moves into the opening.

[0010] Preferably, the end of the blade is arranged inside the opening, and the blade is arranged corresponding to the position of the rubber block.

[0011] With the above technical solution, when the rubber block moves downward, it drives the conductive gasket to move downward, and the conductive gasket is cut by the blade.

[0012] Preferably, the second pressing block is arranged around the outside of the opening, and the second pressing block and the first pressing block are arranged staggeredly.

[0013] With the above technical solution, when the second pressing block moves downward to one side of the first pressing block, the second pressing block and the first pressing block can press the conductive gasket, making the connection of the conductive gasket tighter.

[0014] Preferably, the support rod is slidably connected to the cross plate, the support rod is arranged outside the rubber block and inside the first pressing block, and the support rod is rotatably connected to the ball.

[0015] With the above technical solution, the end of the support rod presses the outside of the conductive gasket to prevent the side of the conductive gasket from warping up.

[0016] Preferably, the rotating block is rotatably connected to the cross plate, the cross plate is rotatably connected to the clamping block, the clamping block is arranged on one side of the sliding rod, the clamping block is arranged corresponding to the position of the clamping groove, and the clamping block is snap-connected to the clamping groove.

[0017] With the above technical solution, the rotating block drives the cross plate to rotate. When the end of the cross plate rotates into the clamping groove, the position of the cross plate is fixed.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: The electromagnetic shielding effectiveness test device for conductive gaskets:

[0019] 1. A cutting mechanism is provided to cut the conductive gasket, making the detection more accurate. Press down the cross plate, and the cross plate pushes the conductive gasket to move into the opening through the rubber block, blocking the opening and fixing the conductive gasket. At this time, the end of the blade cuts the conductive gasket, causing the conductive gasket to block the periphery of the opening, making the conductive gasket closer to the actual usage form and increasing the practicality of the device;

[0020] 2. A fixing mechanism is provided to fix the conductive gasket more precisely. The support rod first contacts the surface of the conductive gasket and presses it to prevent the two sides from warping when the rubber block fixes the conductive gasket, and to prevent the conductive gasket from being indented inward to generate more wrinkles when the rubber block presses the conductive gasket downward. The first pressing block and the second pressing block press the conductive gasket alternately, making the connection between the conductive gasket and the detection box closer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a front view structural schematic diagram of the present utility model;

[0022] Figure 2 is a side view structural schematic diagram of the present utility model;

[0023] Figure 3 is a top view structural schematic diagram of the present utility model;

[0024] Figure 4 is a three-dimensional structural schematic diagram of the present utility model;

[0025] Figure 5 is a three-dimensional structural schematic diagram of the blade installation of the present utility model.

[0026] In the figure: 10, base; 20, detection box; 30, transmitter; 40, receiver;

[0027] 50, sliding rod; 501, cross plate; 502, first spring; 503, rubber block; 504, opening; 505, connecting plate; 506, blade;

[0028] 60, first pressing block; 601, second pressing block; 602, second spring; 603, support plate; 604, support rod; 605, ball; 606, rotating block; 607, clamping block; 608, clamping groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1-5 , the present invention provides a technical solution: an electromagnetic shielding effectiveness test device for conductive gaskets, including a base 10, a detection box 20, a transmitter 30, a receiver 40, a sliding rod 50, a cross plate 501, a first spring 502, a rubber block 503, an opening 504, a connecting plate 505, a blade 506, a first pressing block 60, a second pressing block 601, a second spring 602, a support plate 603, a support rod 604, a ball 605, a rotating block 606, a clamping block 607 and a clamping groove 608;

[0031] The electromagnetic shielding effectiveness test device for conductive gaskets changes the shape of the conductive gasket, making the detection of the conductive gasket more accurate. The specific implementation method is as follows:

[0032] The base 10 is set as a square plate structure, and a detection box 20 is fixedly installed on the surface of the base 10; a transmitter 30 is installed on the inner bottom surface of the detection box 20, a receiver 40 is installed on the surface of the base 10, a cutting mechanism is arranged on the surface of the detection box 20, and the cutting mechanism includes: a plurality of sliding rods 50 are fixedly connected to the surface of the detection box 20, and a cross plate 501 is slidably installed on the surface of the sliding rod 50. A first spring 502 is installed at the bottom of the cross plate 501, and the end of the first spring 502 is connected to the surface of the detection box 20. A rubber block 503 is fixedly connected to the bottom of the cross plate 501. An opening 504 is embedded on the surface of the detection box 20, and a connecting plate 505 is fixedly connected to the inner wall of the detection box 20. A plurality of sections of blades 506 are fixedly connected to the surface of the connecting plate 505. The sliding rod 50 and the cross plate 501 are slidably connected, and the rubber block 503 and the opening 504 are arranged corresponding to each other. The end of the blade 506 is arranged inside the opening 504, and the blade 506 and the rubber block 503 are arranged corresponding to each other.

[0033] As Figure 1, the electric gasket is electrically prevented from being on the surface of the detection box 20, so that the electric gasket is electrically prevented above the opening 504. At this time, the cross plate 501 is pushed downward, so that the cross plate 501 slides downward on the surface of the slide bar 50. When the cross plate 501 moves downward, it squeezes the first spring 502, causing the first spring 502 to contract. The cross plate 501 drives the rubber block 503 to move downward. When the bottom of the rubber block 503 contacts the surface of the electric gasket, the rubber block 503 pushes the electric gasket downward. The rubber block 503 pushes the electric gasket into the opening 504, so that the electric gasket is embedded inside the opening 504. At this time, the electric gasket is squeezed in the gap between the opening 504 and the rubber block 503. At the same time, the rubber block 503 pushes the electric gasket onto the surface of the blade 506, and the blade 506 cuts the surface of the electric gasket, so that the electric gasket only blocks the gap between the opening 504 and the rubber block 503, allowing air to flow between the detection box 20 and the opening 504, and preventing the electric gasket from completely blocking the opening 504.

[0034] For this conductive gasket electromagnetic shielding effectiveness test device, only the sides of the electric gasket are pressed to prevent the two sides of the electric gasket from warping. The specific implementation method is as follows:

[0035] A fixing mechanism is arranged on the surface of the cross plate 501, and the fixing mechanism includes: a first pressing block 60 is arranged around the surface of the cross plate 501, and a second pressing block 601 is fixedly connected to the surface of the detection box 20. A plurality of support plates 603 are installed on the surface of the cross plate 501, and the other end of the support plate 603 is connected to a second spring 602. The end of the second spring 602 is fixedly connected to a support rod 604, and the end of the support rod 604 penetrates the bottom surface of the cross plate 501. A ball 605 is embedded at the end of the support rod 604. A rotating block 606 is rotatably installed on the surface of the cross plate 501, and clamping blocks 607 are symmetrically fixedly connected to the surface of the rotating block 606. Slots 608 are embedded on the surface of the symmetric slide bars 50. The second pressing block 601 is arranged around the outside of the opening 504, and the positions of the second pressing block 601 and the first pressing block 60 are staggered. The support rod 604 is slidably connected to the cross plate 501. The support rod 604 is arranged outside the rubber block 503 and inside the first pressing block 60. And the support rod 604 is rotatably connected to the ball 605. The rotating block 606 is rotatably connected to the cross plate 501, and the cross plate 501 is rotatably connected to the clamping block 607. The clamping block 607 is arranged on one side of the slide bar 50, and the positions of the clamping block 607 and the slot 608 are correspondingly arranged, and the clamping block 607 and the slot 608 are snap-connected.

[0036] When the cross plate 501 moves downward, the cross plate 501 drives the support rod 604 to move downward, so that the end of the support rod 604 moves to the surface of the electric gasket. At this time, the bottom of the electric gasket is in contact with the surface of the second pressing block 601, and the electric gasket is fixed on the surface of the detection box 20. When the rubber block 503 pushes the electric gasket downward, the support rod 604 can press the outside of the electric gasket to prevent the outside of the electric gasket from warping. At the same time, when the rubber block 503 pushes the electric gasket to sink, the electric gasket does not completely move into the opening 504. When the electric gasket sinks inward, the electric gasket moves inward, and the electric gasket drives the ball 605 to rotate inside the support rod 604. When the cross plate 501 continues to move downward, the detection box 20 presses the support rod 604. At this time, the support rod 604 cannot continue to move downward. At this time, the cross plate 501 slides downward on the surface of the support rod 604, and the cross plate 501 drives the support plate 603 to move downward. At this time, the cross plate 501 presses the second spring 602, causing the second spring 602 to contract;

[0037] The cross plate 501 drives the first pressing block 60 to move downward, and the bottom of the first pressing block 60 contacts the surface of the electric gasket. The first pressing block 60 pushes the electric gasket downward, and the bottom of the first pressing block 60 pushes the electric gasket to fit with the surface of the detection box 20. At the same time, the bottom of the first pressing block 60 pushes the electric gasket to contact the surface of the second pressing block 601 more tightly, so that the electric gasket is arranged in the gap between the first pressing block 60 and the second pressing block 601, reducing the gap between the electric gasket and the detection box 20. At this time, the bottom of the cross plate 501 is completely in contact with the surface of the electric gasket;

[0038] Hold the rotating block 606 and rotate it, so that the rotating block 606 rotates inside the detection box 20. The rotating block 606 drives the clamping block 607 to rotate on the surface of the detection box 20, and drives the end of the clamping block 607 to rotate into the clamping groove 608 of the sliding rod 50, fixing the position of the clamping block 607 and fixing the position of the cross plate 501.

[0039] Working principle: When using this conductive gasket electromagnetic shielding effectiveness test device, the rubber block 503, the opening 504, the connecting plate 505 and the blade 506 are set to change the shape of the electric gasket, making the detection of the electric gasket more accurate. The first pressing block 60, the second pressing block 601, the support rod 604 and the ball 605 are set to only press the side of the electric gasket to prevent the two sides of the electric gasket from warping, increasing the overall practicability.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test device for the electromagnetic shielding effectiveness of a conductive gasket, including a base (10) which is set as a square plate structure, and a detection box (20) is fixedly installed on the surface of the base (10); It is characterized in that: An emitter (30) is installed on the inner bottom surface of the detection box (20), a receiver (40) is installed on the surface of the base (10), a cutting mechanism is arranged on the surface of the detection box (20), and the cutting mechanism includes: A plurality of sliding rods (50) are fixedly connected to the surface of the detection box (20), and a cross plate (501) is slidably installed on the surface of the sliding rods (50). A first spring (502) is installed at the bottom of the cross plate (501), and the end of the first spring (502) is connected to the surface of the detection box (20). A rubber block (503) is fixedly connected to the bottom of the cross plate (501). An opening (504) is embedded on the surface of the detection box (20), and a connecting plate (505) is fixedly connected to the inner wall of the detection box (20), and multiple sections of blades (506) are fixedly connected to the surface of the connecting plate (505).

2. The electromagnetic shielding effectiveness testing device for conductive gaskets according to claim 1, wherein: A fixing mechanism is arranged on the surface of the cross plate (501), and the fixing mechanism includes: A first pressing block (60) is arranged around the surface of the cross plate (501), and a second pressing block (601) is fixedly connected to the surface of the detection box (20). A plurality of support plates (603) are installed on the surface of the cross plate (501), and the other end of the support plate (603) is connected to a second spring (602). The end of the second spring (602) is fixedly connected to a support rod (604), and the end of the support rod (604) penetrates the bottom surface of the cross plate (501). A ball (605) is embedded at the end of the support rod (604). A rotating block (606) is rotatably installed on the surface of the cross plate (501), and clamping blocks (607) are symmetrically fixedly connected to the surface of the rotating block (606). Card slots (608) are embedded on the surface of the symmetric sliding rods (50).

3. The electromagnetic shielding effectiveness testing device for conductive gaskets according to claim 1, wherein: The sliding rod (50) is slidably connected to the cross plate (501), and the rubber block (503) is arranged corresponding to the position of the opening (504).

4. The electromagnetic shielding effectiveness testing device for conductive gaskets according to claim 1, wherein: The end of the blade (506) is arranged inside the opening (504), and the blade (506) is arranged corresponding to the position of the rubber block (503).

5. The electromagnetic shielding effectiveness testing device for conductive gaskets according to claim 2, wherein: The second pressing block (601) is arranged around the outside of the opening (504), and the second pressing block (601) and the first pressing block (60) are arranged staggeredly.

6. The electromagnetic shielding effectiveness testing device for conductive gaskets according to claim 2, wherein: The support rod (604) is slidably connected to the cross plate (501), the support rod (604) is arranged outside the rubber block (503), the support rod (604) is arranged inside the first pressing block (60), and the support rod (604) is rotatably connected to the ball (605).

7. The electromagnetic shielding effectiveness testing device for conductive gaskets according to claim 2, wherein: The rotating block (606) is rotatably connected to the cross plate (501), the cross plate (501) is rotatably connected to the clamping block (607), the clamping block (607) is arranged on one side of the sliding rod (50), the clamping block (607) is arranged corresponding to the position of the card slot (608), and the clamping block (607) is snap-connected to the card slot (608).

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