Electrostatic discharge elastic sheet
By designing the groove and contact plate structure of the electrostatic discharge spring, unidirectional assembly on the front and rear cards is achieved, solving the damage problem caused by the existing technology that ESD springs can only be installed upside down, and improving assembly efficiency and strength.
Patent Information
- Application Number
- CN202520030006.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-01-07
AI Technical Summary
Existing ESD spring clips can only be installed upside down when used in rear-mounted applications, which is prone to damage and cannot be installed upright, making assembly difficult.
Design an electrostatic discharge spring, including a groove and a contact piece. The inner side of the groove is bent into a V-shape and equipped with a positioning component, which can position it in the front and back directions to ensure that the contact piece contacts the electrostatic plate of the board and realizes unidirectional assembly.
This avoids damage to the spring clips during rear clamping, simplifies the assembly process, improves assembly efficiency and strength, and prevents deformation.
Smart Images
Figure CN223798394U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrostatic discharge technology, specifically to an electrostatic discharge spring. Background Technology
[0002] ESD (Electro-Static Discharge) springs are elastic contact elements used for electrostatic discharge. Their main function is to provide a low-impedance path in electronic devices, allowing static electricity to be quickly discharged from the protected object or circuit to the ground or other designated grounding system, thereby preventing damage to electronic components caused by static electricity accumulation, such as component damage and performance degradation due to electrostatic breakdown.
[0003] Current circuit board ESD spring structure design allows for both upright and inverted mounting; however, when ESD springs are used on the back card, they can only be inverted. This means that if the back card is mounted upright, the spring cannot contact the electrostatic discharge plate; it can only contact the electrostatic discharge plate of the circuit board when it is inverted. However, because the angle of the ESD spring is small when it is inverted, the ESD spring is prone to being damaged by the circuit board due to deformation and other reasons. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electrostatic release spring that can be assembled in only one direction on the front and rear guide rails without being installed upside down, so as to avoid damage when the rear card is used.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] An electrostatic discharge spring includes a groove, the end of which is connected to a contact piece that can contact an electrostatic plate of a circuit board. The contact piece is bent toward the inside of the groove and has a V-shaped structure. The groove is also provided with a positioning component for positioning on a guide rail.
[0007] Optionally, the contact piece is connected to the side wall of the groove, and the contact piece is located in the upper part of the inner side of the groove.
[0008] Optionally, two contact pieces are provided, which are distributed opposite to each other on the inner side of the groove.
[0009] Optionally, the trough has a U-shaped structure, and the sidewalls of the trough are perpendicular to the bottom plane.
[0010] Optionally, the guide rail includes a mounting part, both ends of which are connected to guide parts. The inner side of the guide part is provided with a sliding groove for mounting plate. A positioning groove is provided between the guide part and the mounting part, and the groove is assembled onto the mounting part by the positioning component.
[0011] Optionally, the positioning component includes two third positioning pieces arranged opposite each other. The upper end of the third positioning piece is connected to the side wall of the groove, and the lower end is folded inward and abuts against the top surface of the mounting part.
[0012] Optionally, a second positioning piece is provided at both ends of the bottom of the groove, and the end of the second positioning piece is folded upward and abuts against the bottom surface of the mounting part.
[0013] Optionally, a first positioning piece is provided on both sides of the second positioning piece, the first positioning piece is located in the positioning groove, and the first positioning piece is perpendicular to the bottom plane of the groove.
[0014] Optionally, the side wall of the groove is provided with a clearance hole corresponding to the third positioning piece.
[0015] Optionally, a clearance groove is also provided on the side wall of the groove, and the clearance groove is located at one end close to the contact piece.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] (1) In this utility model, the groove is installed on the guide rail, and the contact piece is bent and set inside the groove in a V shape, so that when the board is installed into the guide rail in the front and rear directions, the protruding ridge of the contact piece can be in contact with the electrostatic piece of the board. That is, the application of the spring piece on the front and rear cards is all in the same direction of assembly, and there is no need to distinguish between the front card being placed upright and the rear card being inverted. The assembly is convenient and not easy to make mistakes, thus avoiding the situation where the spring piece is damaged by the board.
[0018] (2) In this utility model, the positioning of the groove in the front and rear directions is completed by the cooperation between the first positioning piece and the positioning groove. The positioning of the groove in the vertical direction can be achieved by the contact between the second positioning piece and the third positioning piece and the guide rail mounting part. This is convenient and quick, and helps to improve the assembly efficiency of the spring piece on the guide rail. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the electrostatic release spring in an embodiment of this utility model;
[0020] Figure 2 This is an isometric structural diagram of the electrostatic release spring in an embodiment of this utility model;
[0021] Figure 3 This is a top view of the electrostatic release spring in an embodiment of this utility model;
[0022] Figure 4 This is a schematic diagram of the guide rail structure in an embodiment of this utility model;
[0023] Figure 5This is a schematic diagram of the assembly structure of the electrostatic release spring and the guide rail in an embodiment of this utility model;
[0024] Among them, 1. groove; 101. clearance hole; 102. clearance groove; 2. contact piece; 3. first positioning piece; 4. second positioning piece; 5. third positioning piece; 6. mounting part; 7. guide part; 8. slide groove; 9. positioning groove. Detailed Implementation
[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.
[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an electrostatic discharge spring includes a groove 1, a contact piece 2, and a positioning assembly. The groove 1 can be mounted on a guide rail by the positioning assembly. The contact piece 2 is located inside the groove 1 and can contact the electrostatic discharge plate of the circuit board.
[0027] As described above, the circuit board is inserted into the guide rail, and the electrostatic pad is located on the side of the lower part of the circuit board. When it passes through the guide rail and the spring, the contact piece 2 can firmly abut against the electrostatic pad of the circuit board through its own elasticity, thereby achieving the purpose of releasing the static electricity of the circuit board.
[0028] The groove 1 is formed by bending the two ends of a thin plate upwards. Its cross-section has a U-shaped structure, with a bottom (the unbent thin plate part) and two side walls (the upwardly bent parts). If the opening direction of the groove 1 is defined as upwards, then the bottom is a plane, and the two side walls are perpendicular to the bottom plane, so as to facilitate assembly on the guide rail.
[0029] The contact piece 2 is connected to the end of the tank 1. That is, one end of the contact piece 2 is connected to the end of the side wall of the tank 1, and the other end is bent towards the inside of the tank 1 in a V-shape. The contact piece 2 is located at the upper part of the inside of the tank 1, corresponding to the position and height of the electrostatic sheet.
[0030] This structure ensures that when the circuit board is installed into the guide rail in both the front and rear directions, the protruding ridge of the contact piece 2 can make contact with the electrostatic sheet of the circuit board. In other words, the application of this spring piece on the front and rear cards is always unidirectional, eliminating the need to distinguish between the front card being upright and the rear card being upside down. This makes assembly convenient, reduces the risk of errors, and avoids the situation where the spring piece is damaged by the circuit board.
[0031] There are two contact pieces 2, which are distributed opposite each other on the inner side of the groove 1. When the board is installed into the guide rail, it passes between the two contact pieces 2. Since only one end of the contact piece 2 is connected to the side wall of the groove 1, its own elasticity can ensure that the contact piece 2 is firmly against the electrostatic sheet of the board.
[0032] The guide rail corresponding to the electrostatic release spring proposed in this utility model includes a mounting part 6, and guide parts 7 are connected to both ends of the mounting part 6. A sliding groove 8 for mounting plate is provided on the inner side of the guide part 7. The bottom surface of the sliding groove 8 is flush with the top surface of the mounting part 6, and a positioning groove 9 is provided between the guide part 7 and the mounting part 6.
[0033] As described above, the groove 1 is assembled on the mounting part 6 by a positioning component, and the plate passes through the guide part 7, the mounting part 6 and the two contact pieces 2 along the slide groove 8, with the contact pieces 2 located above the mounting part 6.
[0034] The positioning components include a first positioning piece 3, a second positioning piece 4, and a third positioning piece 5.
[0035] The upper end of the third positioning piece 5 is connected to the side wall of the groove 1, and the lower end is folded inward and abuts against the top surface of the mounting part 6. There are two third positioning pieces 5 arranged opposite each other, symmetrically distributed on the inner side of the groove 1. When the groove 1 is fitted onto the mounting part 6, the groove 1 is located below the mounting part 6, and the end of the third positioning piece 5 abuts against the top surface of the mounting part 6, thus realizing the positioning of the spring piece in the vertical direction.
[0036] Two second positioning plates 4 are provided, distributed opposite each other at both ends of the bottom of the groove 1, and the ends of the second positioning plates 4 are folded upward and abut against the bottom surface of the mounting part 6. The bending directions of the second positioning plates 4 and the third positioning plates 5 are opposite, and the elastic force generated when they are squeezed is also in opposite directions. Therefore, through the contact between the second positioning plates 4 and the third positioning plates 5 and the mounting part 6, it can be ensured that the groove 1 is firmly fixed on the guide rail in the vertical direction.
[0037] The first positioning piece 3 is perpendicular to the side wall and bottom plane of the groove 1; four first positioning pieces 3 are provided, symmetrically distributed in pairs at both ends of the bottom of the groove 1, and the two first positioning pieces 3 at each end are symmetrically distributed relative to the second positioning piece 4; the number and position of the positioning groove 9 correspond to the number of the first positioning pieces 3, that is, the first positioning pieces 3 are located in the positioning groove 9, and the first positioning pieces 3 abut against the side wall (end face of the mounting part 6) of the positioning groove 9; this structure can ensure the positioning of the groove 1 in the front-back direction, so that it is firmly fixed on the guide rail.
[0038] Furthermore, a clearance hole 101 corresponding to the third positioning piece 5 is provided on the side wall of the groove 1, and a clearance groove 102 is also provided on the side wall of the groove 1, which is located at one end close to the contact piece 2.
[0039] To ensure that the spring has a certain degree of elasticity and is easy to process, the groove 1, contact piece 2, first positioning piece 3, second positioning piece 4 and third positioning piece 5 adopt an integral molding structure; after the third positioning piece 5 is peeled off from the side wall of the groove 1, a clearance hole 101 is formed; the clearance groove 102 is also to facilitate the bending of the contact piece 2 relative to the side wall of the groove 1.
[0040] like Figure 5 As shown, the left-hand board is assembled onto the guide rail using the electrostatic discharge spring proposed in this invention to achieve electrostatic discharge, while the right-hand board is assembled onto the guide rail using the original ESD spring. In contrast, the electrostatic discharge spring proposed in this invention only requires assembly of the front and rear guide rails in one direction, eliminating the need for inverted installation, and also increases the strength of the ESD spring to prevent deformation.
[0041] Assembly process:
[0042] External force is applied from the top to separate the two side walls of the groove 1, allowing it to fit onto the mounting part 6 of the guide rail from bottom to top, and the first positioning piece 3 is inserted into the corresponding positioning groove 9, so that the lower end of the third positioning piece 5 contacts the top surface of the mounting part 6, and the second positioning piece 4 contacts the bottom surface of the mounting part 6, completing the positioning assembly; when the plate passes through the guide part 7, the mounting part 6 and the spring piece along the slide groove 8, the two contact pieces 2 can abut against the electrostatic sheet.
[0043] In summary, to address the potential damage to conventional ESD springs in rear-mounted applications, this invention proposes a novel ESD spring that allows for assembly of the front and rear guide rails in only one direction, eliminating the need for inverted installation. This also increases the strength of the ESD spring, preventing deformation.
[0044] In the description of this utility model, 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 orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model 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 this utility model. 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, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0046] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. An electrostatic discharge spring, characterized in that: The device includes a groove (1), the end of which is connected to a contact piece (2) that can contact the electrostatic sheet of the board. The contact piece (2) is bent inward toward the groove (1) and has a V-shaped structure. The groove (1) is also provided with a positioning component for positioning on the guide rail.
2. The electrostatic release spring according to claim 1, characterized in that: The contact piece (2) is connected to the side wall of the groove (1), and the contact piece (2) is located on the upper part of the inner side of the groove (1).
3. The electrostatic release spring according to claim 2, characterized in that: Two contact pieces (2) are provided, which are distributed opposite to each other on the inner side of the groove (1).
4. The electrostatic discharge spring according to claim 3, characterized in that: The trough (1) has a U-shaped structure, and the sidewalls of the trough (1) are perpendicular to the bottom plane.
5. The electrostatic discharge spring according to claim 1, characterized in that: The guide rail includes a mounting part (6), both ends of which are connected to guide parts (7). The inner side of the guide part (7) is provided with a sliding groove (8) for mounting plate. A positioning groove (9) is provided between the guide part (7) and the mounting part (6), and the groove (1) is assembled onto the mounting part (6) by the positioning component.
6. The electrostatic discharge spring according to claim 5, characterized in that: The positioning component includes two third positioning pieces (5) arranged opposite to each other. The upper end of the third positioning piece (5) is connected to the side wall of the groove (1), and the lower end is folded inward and abuts against the top surface of the mounting part (6).
7. The electrostatic discharge spring according to claim 6, characterized in that: The bottom of the groove (1) is provided with a second positioning piece (4) at both ends. The end of the second positioning piece (4) is folded upward and abuts against the bottom surface of the mounting part (6).
8. The electrostatic discharge spring according to claim 7, characterized in that: The second positioning piece (4) is provided with a first positioning piece (3) on both sides. The first positioning piece (3) is located in the positioning groove (9) and is perpendicular to the bottom plane of the groove (1).
9. The electrostatic discharge spring according to claim 6, characterized in that: The side wall of the groove (1) is provided with a clearance hole (101) corresponding to the third positioning piece (5).
10. The electrostatic discharge spring according to claim 9, characterized in that: The side wall of the groove (1) is also provided with a clearance groove (102), which is located at one end close to the contact piece (2).