Electrostatic discharge test electrostatic gun return wire fixing device

Abstract

This invention provides a device for fixing the return line of an electrostatic discharge test gun, comprising a fixing component, a connecting component, and several limiting components. The fixing component has a fan-shaped structure, and one side of its bottom is mounted to the outside via the connecting component. Several limiting components are evenly installed on the outer arc section of the fixing component, and the limiting components are used to limit the return line of the electrostatic discharge gun. The beneficial effects of this invention are: it fundamentally ensures compliance with the requirements of standards GB / T19951-2019 and ISO 10605:2008 regarding the test setup, stating that "the discharge return line of the generator should be at least 0.2m away from the DUT and its cable," thereby maximizing the accuracy, reproducibility, and repeatability of the test results.

Description

Technical Field

[0001] This invention belongs to the technical field of electromagnetic compatibility electrostatic discharge immunity testing for road vehicles, and in particular relates to a device for fixing the return wire of an electrostatic discharge test electrostatic gun. Background Technology

[0002] The electrostatic discharge testing standards GB / T 19951-2019 "Test Methods for Immunity to Electrostatic Discharge of Electrical / Electronic Components of Road Vehicles" and ISO 10605:2008 "Road vehicles—Test methods for electrical displacements from electrostatic discharge" require that "the discharge loop of the generator should be at least 0.2m away from the DUT and its cables." Because the electrostatic discharge gun moves continuously during the test as the sample discharge position changes, it is impossible to guarantee that the distance between the discharge loop and the DUT and its cables remains ≥0.2m. This results in the induced electromagnetic field on the loop acting on the sample or its wiring harness, affecting the test results. How to effectively ensure that the distance between the discharge loop and the sample and its wiring harness meets the standard requirements has become a key focus for electrostatic discharge gun equipment suppliers and laboratories in quality control. The electrostatic discharge gun loop fixing device developed under these circumstances can fix the discharge loop in a position that meets the standard requirements without affecting the coverage of each discharge point of the sample by the discharge gun. To meet the standard requirements, this patent provides a practical and effective solution to ensure the distance between the discharge loop and the sample and its wiring harness. Summary of the Invention

[0003] In view of this, the present invention aims to provide a device for fixing the return line of an electrostatic discharge test gun, so as to fundamentally meet the requirements of GB / T 19951-2019 and ISO 10605:2008 for the test setup that "the discharge return line of the generator shall be at least 0.2m away from the DUT and its cable", thereby preventing the electromagnetic field induced on the return line of the electrostatic discharge gun from acting on the sample or its cable bundle and affecting the test results.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] An electrostatic discharge test electrostatic gun return wire fixing device includes a fixing component, a connecting component, and several limiting components. The fixing component has a fan-shaped structure. One side of the bottom of the fixing component is installed to the outside through the connecting component. Several limiting components are evenly installed on the outer arc section of the fixing component. The limiting components are used to limit the return wire of the electrostatic gun.

[0006] Furthermore, the fixing component includes a fan-shaped body and a fixing body. The fixing body is provided at the bottom of the fan-shaped body. The fixing body is used in conjunction with the connecting component. A plurality of limiting holes are evenly opened on the arc section of the fan-shaped body. The limiting component is installed on the fan-shaped body through the limiting holes.

[0007] Furthermore, the arc segment of the fan-shaped body is provided with a first clearance groove along the circumferential direction. The cross-section of the first clearance groove is a semi-circular structure, and the first clearance groove is used to place the electrostatic gun return wire.

[0008] Furthermore, the fixing body has an L-shaped structure, a threaded hole is provided on one side of the fixing body, a connector is installed in the threaded hole, and all corners of the fixing body have a chamfered structure.

[0009] Furthermore, the fan-shaped body and the fixed body are integrally formed structures.

[0010] Furthermore, the connector includes a connecting cap, a connecting rod, and a connecting pad. The connecting rod has external threads, one end of the connecting rod is fixedly connected to the connecting cap, and the other end of the connecting rod passes through a threaded hole and connects to the connecting pad.

[0011] Furthermore, the limiting component includes a limiting body and a limiting pin. The limiting body has a U-shaped structure and a second clearance groove is provided inside the limiting body. The second clearance groove has a semi-circular structure. Pin holes are provided on both sides of the limiting body, and the limiting pin is installed on the limiting body through the pin holes.

[0012] Compared with existing technologies, the electrostatic discharge test electrostatic gun return wire fixing device of the present invention has the following advantages:

[0013] The electrostatic discharge test electrostatic gun return line fixing device described in this invention fundamentally ensures that the requirements of standard GB / T19951-2019 and ISO 10605:2008 for the test setup "the discharge return line of the generator should be at least 0.2m away from the DUT and its cable" are met, thus maximizing the accuracy, reproducibility and repeatability of the test results. Attached Figure Description

[0014] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure according to an embodiment of the present invention;

[0016] Figure 2 This is a side view of the overall structure according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Fixing component; 11. Fan-shaped body; 111. First clearance groove; 12. Fixing body; 2. Connecting component; 21. Connecting cap; 22. Connecting rod; 23. Connecting pad; 3. Limiting component; 31. Limiting body; 311. Second clearance groove; 32. Limiting pin. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] like Figures 1 to 2 As shown, the electrostatic discharge test electrostatic gun return line fixing device includes a fixing component 1, a connecting component 2 and several limiting components 3. The fixing component 1 has a fan-shaped structure. One side of the bottom of the fixing component 1 is installed to the outside through the connecting component 2. Several limiting components 3 are evenly installed on the outer arc section of the fixing component 1. The limiting components 3 are used to limit the return line of the electrostatic gun.

[0024] This invention can fundamentally ensure that the requirements of standard GB / T 19951-2019 and ISO 10605:2008 for the test setup "the discharge loop of the generator should be at least 0.2m away from the DUT and its cable", thus maximizing the accuracy, reproducibility and repeatability of the test results.

[0025] In a preferred embodiment of the present invention, the fixing body 1 includes a fan-shaped body 11 and a fixing body 12. The fixing body 12 is provided at the bottom of the fan-shaped body 11. The fixing body 12 is used in conjunction with the connector 2. A plurality of limiting holes are evenly provided on the arc section of the fan-shaped body 11. The limiting member 3 is installed on the fan-shaped body 11 through the limiting holes. In actual use, the number of limiting holes can be set arbitrarily, and the number of limiting holes and the number of limiting members 3 can be different. The specific situation depends on the actual situation. In this embodiment, the number of limiting holes is 3.

[0026] In a preferred embodiment of the present invention, the arc segment of the fan-shaped body 11 is provided with a first clearance groove 111 along the circumferential direction. The cross-section of the first clearance groove 111 is a semi-circular structure. The first clearance groove 111 is used to place the electrostatic gun return wire. In actual use, the first clearance groove 111 and the second clearance groove 311 of the limiting member 3 form a closed loop structure, thereby limiting the position of the electrostatic gun return wire.

[0027] In a preferred embodiment of the present invention, the fixing body 12 has an L-shaped structure, and a threaded hole is provided on one side of the fixing body 12. The connecting piece 2 is installed in the threaded hole, and all corners of the fixing body 12 are chamfered. The purpose of the L-shaped structure of the fixing body 12 is to form a rectangular slot structure with the fan-shaped body 11. The rectangular slot structure makes it easy to clamp the device on the worktable. In this embodiment, the chamfered structure is designed to avoid scratching the workers.

[0028] In a preferred embodiment of the present invention, the fan-shaped body 11 and the fixed body 12 are integrally formed. The purpose of integrally forming the fan-shaped body 11 and the fixed body 12 is to facilitate machining and further enhance the practicality of the fixing device.

[0029] In a preferred embodiment of the present invention, the connector 2 includes a connector cap 21, a connector rod 22, and a connector pad 23. The connector rod 22 has an external thread. One end of the connector rod 22 is fixedly connected to the connector cap 21, and the other end of the connector rod 22 passes through a threaded hole and connects to the connector pad 23. In actual use, the operator can adjust the position of the connector rod 22 and the connector pad 23 in the rectangular slot structure by turning the connector cap 21, thereby making it easy for the operator to fix the device on the edge of the workbench or detach it from the workbench.

[0030] In a preferred embodiment of the present invention, the limiting member 3 includes a limiting body 31 and a limiting pin 32. The limiting body 31 has a U-shaped structure and a second clearance groove 311 is provided inside the limiting body 31. The second clearance groove 311 has a semi-circular structure. Pin holes are provided on both sides of the limiting body 31. The limiting body 31 is installed with the limiting pin 32 through the pin holes. In actual use, after the worker puts the electrostatic gun return line into the first clearance groove 111, the worker can install the limiting body 31 on the fan-shaped body 11 with the limiting pin 32.

[0031] Example 1

[0032] This technical solution mainly consists of two parts: one is the part that fixes the invention to the test table, and the other is the part that fixes the electrostatic gun return wire.

[0033] Fixed part: The thickness of the whole invention is 40mm. The main body of this part is a 1 / 4 ellipse with a radius of 300mm on one side and 250mm on the other side, with any point as the center. A rectangle is cut out with a side length of 45mm / 50mm downward from this center.

[0034] Electrostatic gun return line fixing part: The groove is used to fix the electrostatic gun test return line, ensuring that the distance between any point of the return line and the test object meets the standard requirements.

[0035] When an object accumulates static electricity, its potential becomes very high, often reaching several thousand volts or more. When the strength of the electric field exceeds the dielectric strength of the nearby dielectric, the electric field force causes the bound electrons in the dielectric to break free from the atomic nuclei and become free electrons. The dielectric then becomes a conductor, and a discharge phenomenon occurs, known as electrostatic discharge (ESD). ESD exists throughout the entire lifecycle of automotive electronics, complete vehicles, and most industrial products. ESD testing is a crucial test item in the field of electromagnetic compatibility (EMC).

[0036] Currently, major domestic and international electrostatic gun manufacturers are not sufficiently aware of the standard's description that "the discharge loop of the generator should be at least 0.2m away from the DUT and its cable." Various testing institutions have not fully understood this requirement in the standard, and there are more or less operations or arrangements that do not meet the standard requirements, affecting the test results.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for fixing the return wire of an electrostatic discharge test gun, characterized in that: It includes a fixing part (1), a connecting part (2) and several limiting parts (3). The fixing part (1) is a fan-shaped structure. The bottom side of the fixing part (1) is installed to the outside through the connecting part (2). Several limiting parts (3) are evenly installed on the outer arc section of the fixing part (1). The limiting parts (3) are used to limit the return line of the electrostatic gun. The fastener (1) includes a fan-shaped body (11) and a fixed body (12); The arc segment of the fan-shaped body (11) is provided with a first clearance groove (111) along the circumferential direction. The cross-section of the first clearance groove (111) is a semi-circular structure. The first clearance groove (111) is used to place the electrostatic gun return wire. The limiting component (3) includes a limiting body (31) and a limiting pin (32). The limiting body (31) has a U-shaped structure and a second clearance groove (311) is provided inside the limiting body (31). The second clearance groove (311) has a semi-circular structure. Pin holes are provided on both sides of the limiting body (31). The limiting body (31) is equipped with the limiting pin (32) through the pin holes.

2. The electrostatic discharge test electrostatic gun return wire fixing device according to claim 1, characterized in that: The bottom of the fan-shaped body (11) is provided with a fixed body (12), which is used in conjunction with the connector (2). The arc section of the fan-shaped body (11) is evenly provided with several limiting holes, and the limiting component (3) is installed on the fan-shaped body (11) through the limiting holes.

3. The electrostatic discharge test electrostatic gun return wire fixing device according to claim 2, characterized in that: The fixing body (12) has an L-shaped structure. A threaded hole is provided on one side of the fixing body (12), and a connector (2) is installed in the threaded hole. All corners of the fixing body (12) are chamfered.

4. The electrostatic discharge test electrostatic gun return wire fixing device according to claim 2, characterized in that: The fan-shaped body (11) and the fixed body (12) are integrally formed structures.

5. The electrostatic discharge test electrostatic gun return wire fixing device according to claim 3, characterized in that: The connector (2) includes a connector cap (21), a connector rod (22) and a connector pad (23). The connector rod (22) has an external thread. One end of the connector rod (22) is fixedly connected to the connector cap (21), and the other end of the connector rod (22) passes through a threaded hole and is connected to the connector pad (23).

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