Support convenient for testing pins of tested piece in electrostatic discharge test
The bracket addresses inefficiencies in electrostatic discharge testing by enabling consistent discharge and reducing manual intervention, improving test reproducibility and efficiency.
Patent Information
- Application Number
- CN202420380789.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-02-28
AI Technical Summary
Existing electrostatic discharge testing methods for automobile components face challenges such as inconsistent overlap with pins, manual wire replacement, and variable discharge energy levels, leading to inefficiency and unreliability.
A bracket with a metal male plug and solid metal column extension is used to facilitate direct testing of densely packed pins, ensuring consistent discharge and reducing manual intervention.
The bracket enhances test reproducibility and efficiency by maintaining consistent discharge energy levels and eliminating the need for manual wire replacement, while adhering to standard requirements.
Smart Images
Figure CN222299657U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electromagnetic compatibility detection, in particular to a bracket which is convenient for testing the pins of a tested component in an electrostatic discharge test. Background Art
[0002] In a dry environment, electrostatic charges may accumulate between the car and its passengers and the surface of the vehicle. If these accumulated electrostatic charges cannot be effectively released, they may be discharged during operations such as refueling and maintenance of the car, causing fire or other safety hazards. Therefore, electrostatic discharge testing of automobiles has become a necessary means of evaluating safety performance. The utility model involves the pin test of the DUT without power in the test of vehicle-mounted electrostatic discharge immunity (Test method for electrostatic discharge immunity of electrical / electronic components of road vehicles GB / T19951-2019).
[0003] When applying discharge to each connection pin of the in-vehicle electronic components that is easily touched during transportation, since the pins of most products are in the concave grooves of the connector and most of them are densely packed, it is not easy for the electrostatic gun to use the contact discharge electrode to directly test the pins. If the tester wants to perform a pin discharge test, the standard method is to use a 0.5mm cross-sectional area 2 ~2mm 2 Use an insulated solid metal wire with a length no longer than 25mm to lead out the pins. Then use an electrostatic gun to discharge the metal wire for testing.
[0004] However, the above method has three inconveniences: first, it cannot ensure that the overlap between the insulated solid metal wire and each pin is consistent, so the reproducibility of the test cannot be guaranteed; second, after each pin is tested, the insulated solid metal wire needs to be manually pulled out and replaced with the next pin, which greatly affects the test efficiency; third, the tester cannot ensure the consistency of the discharge steps of the electrostatic gun on the insulated solid metal wire each time, which will affect the electrostatic energy level that finally reaches the pin. Utility Model Content
[0005] In order to make up for the above shortcomings, the utility model provides a bracket which is convenient for testing the pins of the device under test in an electrostatic discharge test. When performing an electrostatic discharge test on the pins, the bracket can extend the contact discharge electrode, and the tester can directly use an electrostatic gun to test the pins that were originally out of reach of the contact discharge electrode or densely packed pins one by one, effectively ensuring the reliability of the test.
[0006] The utility model is achieved in this way:
[0007] A bracket is convenient for testing the pins of a device under test in an electrostatic discharge test. One end of the bracket is a metal male plug that can wrap the electrostatic gun contact discharge electrode, and the other end of the bracket is a solid metal column with a length of 20 mm and an insulating layer on the surface. One end of the solid metal column is fixedly connected to one end of the metal male plug, and the end of the solid metal column away from the metal male plug is provided with a cavity for contacting the pins on the connector of the electronic product under test.
[0008] In an embodiment of the utility model, the metal male plug has a plug hole at one end close to the contact discharge electrode, the hole diameter of the plug hole is larger than the outer contour size of the contact discharge electrode, and the contact discharge electrode is plugged into the inside of the plug hole.
[0009] In an embodiment of the present utility model, the metal male plug is in the shape of a circular tube, the outer diameter φ1 of the metal male plug is 17 mm, and the inner diameter φ2 of the plug hole is 13 mm.
[0010] In an embodiment of the present invention, a screw is threadedly connected to the side wall of the metal male head, and the screw abuts against the side wall of the contact discharge electrode to fix it.
[0011] In an embodiment of the present utility model, a rubber pad is provided at the contact portion between the screw and the contact discharge electrode.
[0012] In an embodiment of the present invention, the bracket is made of stainless steel.
[0013] In an embodiment of the present invention, the shape of the cavity is a 90° cone that is concave inwards.
[0014] In an embodiment of the present invention, the number of the screws is 2.
[0015] In an embodiment of the present invention, the shape of one side of the plug hole close to the solid metal column is set to be a cone shape similar to the shape of the end of the contact discharge electrode.
[0016] In an embodiment of the present invention, the outer diameter φ3 of the solid metal column is 2 mm.
[0017] The beneficial effects of the utility model are:
[0018] 1. No extra learning cost. When the pin electrostatic discharge test is required, after installing this bracket, the test can be performed directly according to the original normal electrostatic discharge test method.
[0019] 2. In compliance with standard requirements, the length, diameter and other parameters of this bracket are within the requirements of the standard (GB / T19951-2019).
[0020] 3. Effectively reduce the laboratory's electrostatic discharge test time and improve test efficiency.
[0021] 4. The structure ensures the consistency of multiple discharges of the pins, improving the accuracy and reproducibility of the test. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 A three-dimensional diagram of a bracket provided for an embodiment of the utility model;
[0024] Figure 2 A schematic cross-sectional view of a bracket provided in an embodiment of the utility model;
[0025] Figure 3 A schematic diagram of the use principle of the bracket provided in the embodiment of the utility model.
[0026] In the figure: 1. bracket; 11. metal male connector; 111. plug hole; 12. solid metal column; 121. cavity; 13. screw; 2. electrostatic gun; 21. contact discharge electrode; 3. electronic product under test; 31. connector; 32. pin. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.
[0029] Figures 1-2A schematic diagram of the structure of the bracket provided by the embodiment of the utility model is shown. It can be seen that the structure of the bracket 1 includes a metal male connector 11 arranged at one end and a solid metal column 12 arranged at the other end, wherein the metal male connector 11 mainly functions to fix the contact discharge electrode 21, and one end of the metal male connector 11 is provided with a plug hole 111, and its aperture is slightly larger than the external contour size of the contact discharge electrode 21 of the standard electrostatic gun 2, so as to facilitate the plugging of the contact discharge electrode 21 therein, and its wrapped structure can ensure good and reliable contact between the bracket 1 and the contact discharge electrode 21, and the solid metal column 12 is welded together with the metal male connector 11. After the contact discharge electrode 21 of the electrostatic gun 2 is plugged into the plug hole 111 of the metal male connector 11, it can be electrically connected to the pin 32 of the connector 31 on the electronic product 3 under test through the solid metal column 12.
[0030] like Figures 1 to 3 As shown, in one embodiment, the metal male connector 11 is in the shape of a circular tube, the outer diameter φ1 of the metal male connector 11 is 17 mm, the inner diameter φ2 of the plug hole 111 is 13 mm, and the shape of one side of the plug hole 111 close to the solid metal column 12 is set to be a cone similar to the shape of the end of the contact discharge electrode 21, which serves to accommodate the end of the contact discharge electrode 21, thereby achieving the wrapping effect of the metal male connector 11 on the contact discharge electrode 21, enhancing the contact area between the metal male connector 11 and the contact discharge electrode 21, and improving the stability of the connection.
[0031] like Figures 1-2 As shown, in order to prevent the contact discharge electrode 21 and the metal male head 11 from sliding during the test, a screw 13 is threadedly connected to the side wall of the metal male head 11. After the contact discharge electrode 21 is inserted into the socket 111, the screw 13 can be rotated to make it contact with the side wall of the contact discharge electrode 21 to fix it.
[0032] It should be noted that the contact discharge electrode 21 can work normally when directly plugged into the inside of the socket 111, but there is a possibility of relative sliding between the contact discharge electrode 21 and the metal male head 11 during testing. Generally, it is necessary to use screws 13 to fix it during use to prevent it from sliding.
[0033] In the above-mentioned preferred embodiment, a rubber pad is provided at the contact portion between the screw 13 and the discharge electrode 21, which can increase the friction between the screw 13 and the side wall of the discharge electrode 21 to better fix it and also prevent the screw 13 from damaging the side wall of the discharge electrode.
[0034] like Figures 1 to 3 As shown, the number of the screws 13 is at least 1, preferably 2.
[0035] In one embodiment, the material of the bracket 1 is stainless steel, which is the same material as the contact discharge electrode 21, and has extremely small internal resistance. The electrostatic gun 2 connected to the bracket 1 is compared with the original electrostatic gun 2 with the same test level output results. The current, voltage levels and waveforms are almost the same, and the impact on the test is negligible.
[0036] like Figure 2 As shown, after the solid metal column 12 is connected to the metal male connector 11, its main function is to extend the contact discharge electrode 21. The outer diameter φ3 of the solid metal column 12 is 2 mm. The end of the solid metal column 12 away from the metal male connector 11 is provided with a cavity 121 for contacting the pin 32 on the connector 31 of the electronic product 3 under test. The shape of the cavity 121 is a 90° concave cone.
[0037] like Figures 1 to 3 As shown, in the above embodiment, the solid metal column 12 is connected to the pin 32 of the connector 31 of the electronic product 3 under test through the cavity 121. The extended length and diameter of the solid metal column 12 are both within the standard requirements, so that after the extension, it is easy to accurately discharge the pins 32 or densely packed pins 32 that were previously inaccessible. The structure of the concave 90° conical cavity 121 can ensure good and reliable contact with the pins 32. The outer insulating layer of the solid metal column 12 is used to ensure that during the electrostatic discharge test, the electrostatic energy is concentrated on the pin 32 under test and will not be discharged to other conductive components or other pins 32.
[0038] It should be noted that the electronic product 3 under test has at least one connector 31 , and one connector 31 has at least one pin 32 .
[0039] Specifically, the working principle of the bracket is as follows: during use, after the contact discharge electrode 21 of the electrostatic gun 2 is inserted into the plug hole 111 of the metal male head 11 of the bracket 1, the screw 13 is tightened to further fix it to prevent sliding, and the cavity 121 of the solid metal column 12 is clamped on the pin 32 of the connector 31 of the electronic product 3 under test, and the metal wire discharge test can be performed with the electrostatic gun 2. The structure of this bracket not only ensures the consistency of multiple discharges to the pin 32, improves the accuracy and reproducibility of the test, but also after it is connected to the contact discharge electrode 21, it can move with the contact discharge electrode 21, avoiding the need to manually pull out the insulated solid metal wire each time and switch to the next pin 32, effectively reducing the laboratory's electrostatic discharge test time and improving test efficiency.
[0040] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A bracket for testing the pins of a device under test in an electrostatic discharge test, characterized in that: One end of the bracket (1) is a metal male connector (11) capable of wrapping an electrostatic gun (2) contacting a discharge electrode (21), and the other end of the bracket (1) is a solid metal column (12) with a length of 20 mm and an insulating layer on the surface, one end of the solid metal column (12) is fixedly connected to one end of the metal male connector (11), and one end of the solid metal column (12) away from the metal male connector (11) is provided with a cavity (121) for contacting a pin (32) on a connector (31) of a tested electronic product (3).
2. A bracket for testing the pins of a device under test in an electrostatic discharge test according to claim 1, characterized in that: The metal male connector (11) has a plug hole (111) at one end close to the contact discharge electrode (21); the hole diameter of the plug hole (111) is larger than the external contour size of the contact discharge electrode (21); and the contact discharge electrode (21) is plugged into the inside of the plug hole (111).
3. A bracket for testing the pins of a device under test in an electrostatic discharge test according to claim 2, characterized in that: The metal male head (11) is in the shape of a circular tube, the outer diameter φ1 of the metal male head (11) is 17 mm, and the inner diameter φ2 of the plug hole (111) is 13 mm.
4. A bracket for facilitating electrostatic discharge testing of the pins of a device under test according to any one of claims 1 to 3, characterized in that: A screw (13) is threadedly connected to the side wall of the metal male head (11), and the screw (13) contacts the side wall of the contact discharge electrode (21) to fix it.
5. A bracket for testing the pins of a device under test in an electrostatic discharge test according to claim 4, characterized in that: A rubber pad is provided at the contact portion between the screw (13) and the contact discharge electrode (21).
6. A bracket for testing the pins of a device under test in an electrostatic discharge test according to claim 4, characterized in that: The support (1) is made of stainless steel.
7. A bracket for testing the pins of a device under test in an electrostatic discharge test according to claim 4, characterized in that: The cavity (121) is in the shape of a 90° concave cone.
8. The bracket for facilitating electrostatic discharge test of the pins of the device under test according to claim 4, characterized in that: The number of the screws (13) is 2.
9. A bracket for testing the pins of a device under test in an electrostatic discharge test according to claim 2, characterized in that: The shape of one side of the plug hole (111) close to the solid metal column (12) is set to be a cone shape similar to the shape of the end of the contact discharge electrode (21).
10. The bracket for testing the pins of a device under test in an electrostatic discharge test according to claim 4, characterized in that: The outer diameter φ3 of the solid metal column (12) is 2 mm.