Portable height-adaptive lead type EMI filter shielding test device

Abstract

The utility model relates to the technical field of electronic appliances, and discloses a portable height-adaptive lead-type EMI filter shielding test device, which comprises a printed circuit board, the rear side of the top surface of the printed circuit board is fixedly connected with a differential mode test function area, and the front side of the top surface of the printed circuit board is fixedly connected with a common mode test function area. The left side and the right side of the differential mode test function area are provided with differential mode test connection assemblies, the left side and the right side of the common mode test function area are provided with common mode test connection assemblies, the bottom of the printed circuit board is provided with a shielding assembly, and the top surface in the shielding assembly is provided with a fixed connection assembly. Through the design of the shielding assembly, external electromagnetic interference in the test process is avoided, through the design of the fixed connection assembly, connection is stable in the connection test process, errors caused by large fluctuation of test data of insertion loss due to shaking are avoided, and meanwhile the protective sleeve prevents the outer surface of the connecting line from being damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic appliance technical field, concretely is a portable self -adaptation height's lead -type EMI filter shielding test device. BACKGROUND

[0002] The requirement of electronic equipment to electromagnetic compatibility is increasing, and it is an effective method to use EMI filter to restrain or cut off mutual interference between electronic equipment, which helps product to improve electromagnetic compatibility. Therefore, EMI filter is used in large quantities.

[0003] The most important electrical performance index for evaluating whether the performance of EMI filter is excellent is "insertion loss", which is the ability to represent the restraint or cut-off of conducted interference, and is divided into common mode insertion loss and differential mode insertion loss. Therefore, in the test process of EMI filter, the insertion loss index needs to be accurately tested, so as to judge whether the insertion loss of EMI filter meets the design requirement, and to ensure that EMI filter can achieve the expected effect in actual use, and cannot have too much surplus, and the practicability and economy are considered.

[0004] Lead-type EMI filter is a commonly used EMI filter, and the input and output lines are led out in the form of lead, which is usually installed on the case, and the lead can be selected to be welded, screwed or pressed, which has the characteristics of simple installation and flexible use. At present, the test of insertion loss of lead-type EMI filter is mostly in an open environment, and the alligator clip is directly clamped on the lead-out line end, and then a lead is connected to the test equipment. Although this test method is simple, the product and the connection are not fixed, and are easy to move or shake, which leads to large fluctuation of the test data of insertion loss, and easy to read error value. When the alligator clip is used for fixation, the stability of the connection is ensured, but the connection line is damaged at the same time. At the same time, in the complex electromagnetic environment, the open test is easy to be affected by external electromagnetic interference, and needs to be improved. Therefore, we provide a portable self-adaptive height lead-type EMI filter shielding test device. UTILITY MODEL CONTENTS

[0005] In view of the defects of the prior art, the utility model provides a portable self-adaptive height lead-type EMI filter shielding test device, which solves the above problems.

[0006] In order to realize the above purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a portable self -adaptation height's lead type EMI filter shielding test device, including printed circuit board, the top surface rear side fixed connection of printed circuit board has differential mode test function area, the top surface front side fixed connection of printed circuit board has common mode test function area, the left and right sides of differential mode test function area are provided with differential mode test connection assembly, the left and right sides of common mode test function area are provided with common mode test connection assembly, the bottom of printed circuit board is provided with shielding assembly, the top surface in shielding assembly is provided with fixed connection assembly.

[0008] Preferably, the top surface of the printed circuit board is provided with a positioning hole penetrating through the bottom, the bottom of the printed circuit board is fixedly connected with a circuit board support table, the top surface of the circuit board support table is provided with a threaded groove, the inner side of the positioning hole is slidably connected with a circuit board fixing screw, and the inner side of the threaded groove is threadedly connected with the circuit board fixing screw.

[0009] Preferably, the differential mode test connection assembly comprises an SMA connector and a terminal, the left and right sides of the differential mode test function area are fixedly connected with a connecting plate one, the rear side of the top surface of the printed circuit board is fixedly connected with the connecting plate one, the top surface of the connecting plate one is fixedly connected with two terminals distributed at equal intervals, and the top surface of the connecting plate one is fixedly connected with the SMA connector.

[0010] Preferably, the common mode test connection assembly comprises an SMA connector and a terminal, the left and right sides of the common mode test function area are fixedly connected with a connecting plate two, the front side of the top surface of the printed circuit board is fixedly connected with the connecting plate two, the top surface of the connecting plate two is fixedly connected with the terminal, and the top surface of the connecting plate two is fixedly connected with the SMA connector.

[0011] Preferably, the shielding assembly comprises a shielding support bottom plate, a shielding shell and a shielding cover plate, the bottom surface of the circuit board support table is fixedly connected with the shielding support bottom plate, the top surface of the outer side of the shielding support bottom plate is fixedly connected with the shielding shell, the top surface of the shielding shell is slidably connected with the shielding cover plate, the front and rear surfaces of the outer side of the shielding shell are provided with connecting holes penetrating through the inner side, the top surface of the shielding support bottom plate is fixedly connected with clamping support tables distributed at equal intervals, and the top surface of the clamping support tables is provided with the fixed connection assembly.

[0012] Preferably, the fixed connection assembly comprises a clamping bottom plate, a clamping top plate, a clamping stud, a clamping nut, a protective sleeve, a reset spring, the top surface of the clamping support table is fixedly connected with the clamping bottom plate, the top surface of the clamping bottom plate is fixedly connected with equidistantly distributed clamping studs, the top surface of the clamping bottom plate is fixedly connected with the protective sleeve, the top surface of the clamping bottom plate is fixedly connected with the reset spring, the top surface of the reset spring is fixedly connected with the clamping top plate, the top surface of the clamping top plate is provided with a sliding hole penetrating through the bottom, the inner side of the sliding hole is slidably connected with the clamping stud, the outer side of the clamping stud is slidably connected with the inner side of the reset spring, and the top of the reset spring is threadedly connected with the clamping nut.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The utility model discloses a shielding assembly's design avoids the outside electromagnetic interference in the test process, and the design of fixed connection assembly makes the connection more stable when connecting test, avoids the test data fluctuation of insertion loss due to the shaking, thereby reads the error value, and the actual protective sleeve avoids the damage of the outer surface of the connecting wire when fixing the connection. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is overall structure schematic diagram of the utility model;

[0016] Figure 2 It is overall structure cross section schematic diagram of the utility model;

[0017] Figure 3 It is overall structure split schematic diagram of the utility model;

[0018] Figure 4 It is Figure 3 A local amplification schematic diagram in the of the utility model.

[0019] In the drawing: 1, shielding support bottom plate;2, shielding shell;3, shielding cover plate;4, connecting hole;5, circuit board support table;6, printed circuit board;7, differential mode test function area;8, circuit board fixing screw;9, SMA connector;10, wiring terminal;11, clamping support table;12, clamping bottom plate;13, clamping top plate;14, clamping stud;15, clamping nut;16, protective sleeve;17, reset spring;18 threaded groove;19, positioning hole;20, common mode test function area. DETAILED DESCRIPTION

[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0021] Please refer to Figures 1-4 The present application provides a technical solution;

[0022] A portable self-adaptive height lead type EMI filter shielding test device, comprising a printed circuit board 6, the top surface of the printed circuit board 6 is fixedly connected with a differential mode test function area 7 at the rear side, the top surface of the printed circuit board 6 is fixedly connected with a common mode test function area 20 at the front side, the left and right sides of the differential mode test function area 7 are provided with differential mode test connection assemblies, the left and right sides of the common mode test function area 20 are provided with common mode test connection assemblies, the bottom of the printed circuit board 6 is provided with a shielding assembly, and the top surface inside the shielding assembly is provided with a fixed connection assembly.

[0023] Further, the top surface of the printed circuit board 6 is provided with a positioning hole 19 penetrating through the bottom, the bottom of the printed circuit board 6 is fixedly connected with a circuit board support table 5, the top surface of the circuit board support table 5 is provided with a threaded groove 18, the inner side of the positioning hole 19 is slidably connected with a circuit board fixing screw 8, and the inner side of the threaded groove 18 is threadedly connected with the circuit board fixing screw 8.

[0024] Further, the differential mode test connection assembly comprises an SMA connector 9 and a terminal 10, the left and right sides of the differential mode test function area 7 are fixedly connected with a connecting plate one, the rear side of the top surface of the printed circuit board 6 is fixedly connected with the connecting plate one, the top surface of the connecting plate one is fixedly connected with two equidistantly distributed terminals 10, and the top surface of the connecting plate one is fixedly connected with the SMA connector 9.

[0025] Further, the common mode test connection assembly comprises an SMA connector 9 and a terminal 10, the left and right sides of the common mode test function area 20 are fixedly connected with a connecting plate two, the front side of the top surface of the printed circuit board 6 is fixedly connected with the connecting plate two, the top surface of the connecting plate two is fixedly connected with the terminal 10, and the top surface of the connecting plate two is fixedly connected with the SMA connector 9.

[0026] Further, the shielding assembly comprises a shielding support bottom plate 1, a shielding shell 2, a shielding cover plate 3, the bottom surface of the circuit board support table 5 is fixedly connected with the shielding support bottom plate 1, the outer side top surface of the shielding support bottom plate 1 is fixedly connected with the shielding shell 2, the top surface of the shielding shell 2 is slidably connected with the shielding cover plate 3, the outer side front and back surface of the shielding shell 2 is provided with a connecting hole 4 penetrating the inner side, the top surface of the shielding support bottom plate 1 is fixedly connected with equidistantly distributed clamping support tables 11, and the top surface of the clamping support table 11 is provided with a fixed connection assembly.

[0027] Further, the fixed connection assembly comprises a clamping bottom plate 12, a clamping top plate 13, a clamping stud 14, a clamping nut 15, a protective sleeve 16 and a reset spring 17, the top surface of the clamping support table 11 is fixedly connected with the clamping bottom plate 12, the top surface of the clamping bottom plate 12 is fixedly connected with equidistantly distributed clamping studs 14, the top surface of the clamping bottom plate 12 is fixedly connected with the protective sleeve 16, the top surface of the clamping bottom plate 12 is fixedly connected with the reset spring 17, the top surface of the reset spring 17 is fixedly connected with the clamping top plate 13, the top surface of the clamping top plate 13 is provided with a sliding hole penetrating the bottom, the inner side of the sliding hole is slidably connected with the clamping stud 14, the outer side of the clamping stud 14 is slidably connected with the inner side of the reset spring 17, and the top of the reset spring 17 is threadedly connected with the clamping nut 15.

[0028] Working principle: when the utility model needs to be used, when differential mode test needs to be carried out, the connecting wire is penetrated into the fixed connection assembly from the inner side of the connecting hole 4 at the back of the shielding shell 2 and is connected with the SMA connector 9 on the top surface of the connecting plate one, differential mode test is completed through the mutual cooperation between the wiring terminal 10 and the differential mode test function area 7, when common mode test needs to be carried out, the connecting wire is penetrated into the fixed connection assembly from the inner side of the connecting hole 4 at the front of the shielding shell 2 and is connected with the SMA connector 9 on the top surface of the connecting plate two, common mode test is completed through the mutual cooperation between the wiring terminal 10 and the common mode test function area 20, and external shielding during test is completed through the cooperation between the shielding support bottom plate 1, the shielding shell 2 and the shielding cover plate 3, external electromagnetic interference is avoided, meanwhile, when the fixed connection assembly is used, the connecting wire is placed on the top surface of the clamping bottom plate 12, the clamping top plate 13 is pressed downward through the cooperation of the clamping nut 15 and the reset spring 17, the clamping of the connecting wire is completed through the cooperation of the clamping bottom plate 12 and the clamping top plate 13, and the outer surface of the connecting wire is protected through the action of the protective sleeve 16, after test is completed, the clamping top plate 13 is pushed to move upward through the action of the reset spring 17 through the reverse rotation of the clamping nut 15, so that the clamping of the connecting wire is released.

[0029] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable self-adapting height lead-type EMI filter shielding test device comprising a printed circuit board (6), characterized in that: The top surface of the printed circuit board (6) is fixedly connected with a differential mode test function area (7), the top surface of the printed circuit board (6) is fixedly connected with a common mode test function area (20), the left and right sides of the differential mode test function area (7) are provided with differential mode test connection assemblies, the left and right sides of the common mode test function area (20) are provided with common mode test connection assemblies, the bottom of the printed circuit board (6) is provided with a shielding assembly, and the top surface in the shielding assembly is provided with a fixed connection assembly.

2. The portable self-adapting height lead-type EMI filter shielding test device of claim 1, wherein: The top surface of the printed circuit board (6) is provided with a positioning hole (19) penetrating through the bottom, the bottom of the printed circuit board (6) is fixedly connected with a circuit board support table (5), the top surface of the circuit board support table (5) is provided with a threaded groove (18), the inner side of the positioning hole (19) is slidably connected with a circuit board fixing screw (8), and the inner side of the threaded groove (18) is threadedly connected with the circuit board fixing screw (8).

3. The portable self-adapting height lead-type EMI filter shielding test device of claim 2, wherein: The differential mode test connection assembly comprises an SMA connector (9) and a wiring terminal (10), the left and right sides of the differential mode test function area (7) are fixedly connected with a connecting plate one, the top surface of the printed circuit board (6) is fixedly connected with the connecting plate one, the top surface of the connecting plate one is fixedly connected with two equidistantly distributed wiring terminals (10), and the top surface of the connecting plate one is fixedly connected with the SMA connector (9).

4. The portable self-adapting height lead-type EMI filter shielding test device of claim 2, wherein: The common mode test connection assembly comprises an SMA connector (9) and a wiring terminal (10), the left and right sides of the common mode test function area (20) are fixedly connected with a connecting plate two, the top surface of the printed circuit board (6) is fixedly connected with the connecting plate two, the top surface of the connecting plate two is fixedly connected with the wiring terminal (10), and the top surface of the connecting plate two is fixedly connected with the SMA connector (9).

5. The portable self-adapting height lead-type EMI filter shielding test device of claim 2, wherein: The shielding assembly comprises a shielding support bottom plate (1), a shielding shell (2) and a shielding cover plate (3), the bottom surface of the circuit board support table (5) is fixedly connected with the shielding support bottom plate (1), the outer top surface of the shielding support bottom plate (1) is fixedly connected with the shielding shell (2), the top surface of the shielding shell (2) is slidably connected with the shielding cover plate (3), the outer front and rear surfaces of the shielding shell (2) are provided with connecting holes (4) penetrating through the inner side, the top surface of the shielding support bottom plate (1) is fixedly connected with equidistantly distributed clamping support tables (11), and the top surface of the clamping support table (11) is provided with a fixed connection assembly.

6. The portable self-adapting height lead-type EMI filter shielding test device of claim 5, wherein: The fixed connection assembly comprises a clamping bottom plate (12), a clamping top plate (13), a clamping stud (14), a clamping nut (15), a protective sleeve (16) and a reset spring (17), the top surface of the clamping support table (11) is fixedly connected with the clamping bottom plate (12), the top surface of the clamping bottom plate (12) is fixedly connected with equidistantly distributed clamping studs (14), the top surface of the clamping bottom plate (12) is fixedly connected with the protective sleeve (16), the top surface of the clamping bottom plate (12) is fixedly connected with the reset spring (17), the top surface of the reset spring (17) is fixedly connected with the clamping top plate (13), the top surface of the clamping top plate (13) is provided with a sliding hole penetrating through the bottom, the inner side of the sliding hole is slidingly connected with the clamping stud (14), the outer side of the clamping stud (14) is slidingly connected with the inner side of the reset spring (17), and the top of the reset spring (17) is threadedly connected with the clamping nut (15).

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