A wiring terminal
By using a localized plating design to coat specific areas of the terminal block with nickel and gold layers, the problem of high cost associated with overall precious metal plating is solved. This achieves high conductivity and corrosion resistance in the terminal block, while reducing the cost of using precious metals.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 东莞市东讯五金电气有限公司
- Filing Date
- 2025-07-31
- Publication Date
- 2026-08-04
AI Technical Summary
Existing technologies involve high costs and low material utilization rates for overall precious metal plating, making it difficult to meet the requirements of miniaturization and high integration of electronic devices for the corrosion resistance, conductivity, and long-term stability of wiring terminals.
The design employs a localized plating technique, which reduces the use of precious metals by coating specific areas of the terminals with nickel and gold layers. This localized plating reduces costs while maintaining high conductivity and corrosion resistance.
This technology enables partial plating of terminals, reducing the cost of precious metal plating, improving material utilization, and meeting the needs of miniaturization and high integration of electronic devices.
Smart Images
Figure CN224595838U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of terminal technology, and in particular relates to a wiring terminal. Background Technology
[0002] Terminal blocks, as a core component of electrical connection systems, are widely used in electronic equipment, power transmission, industrial automation, automotive electronics, and other fields. Their main function is to achieve efficient and stable connection between wires, circuit boards, or other electronic components through reliable mechanical connection and electrical conduction. With the miniaturization and high integration of electronic equipment, the application scenarios of terminal blocks are becoming increasingly diversified, placing higher demands on their corrosion resistance, conductivity, wear resistance, and long-term stability.
[0003] Traditional terminal block surface treatment often employs an overall plating process, which involves covering the entire terminal block with a metal plating layer. The core advantage of this approach is that the plating layer uniformly covers all exposed surfaces of the terminal block, completely blocking direct contact between the base metal and the environmental medium, effectively improving corrosion resistance; at the same time, the low resistivity of the plating layer reduces contact resistance, ensuring the stability of the electrical connection.
[0004] However, the overall plating solution has gradually revealed significant cost and efficiency bottlenecks in practical applications. Although precious metal plating (such as gold and silver) has excellent performance, its raw materials are expensive, and overall plating requires plating all surfaces of the terminal, resulting in extremely low utilization of precious metal materials. Utility Model Content
[0005] The purpose of this utility model is to provide a terminal block that addresses the problem of high cost of precious metal plating in the overall plating scheme of the prior art, and realizes the plating of local contact areas of the terminal block to reduce the cost of precious metal plating.
[0006] To achieve the above objectives, this utility model provides a terminal block comprising an integrally formed main connecting portion, two side connecting portions, and two contact portions, wherein:
[0007] Two side connecting parts are mirrored on the left and right sides of the main connecting part, and a first included angle is formed between the side connecting parts and the main connecting part, the first included angle being 130° to 140°; a plug pin is provided at the upper end of the side connecting part, the plug pin including a plug head and a plug tail provided at the top and bottom, and the front and rear surfaces of the plug head are coated with a nickel layer and a matte tin layer from the inside to the outside;
[0008] The free end of the side connection portion is provided with the contact portion, and the contact portion and the side connection portion form a second included angle, the second included angle being in the range of 40° to 50°. The contact portion is parallel to the main connection portion, and its surface facing away from the main connection portion is the contact surface. The contact surface is coated with a nickel layer and a gold layer from the inside out.
[0009] As an optional solution of this utility model, a guide portion is provided below the contact portion, and a third included angle is formed between the contact portion and the guide portion, the range of the third included angle being 160° to 170°.
[0010] As an optional embodiment of this invention, the front surface of the guide portion is coated with a nickel layer and a gold layer from the inside out.
[0011] As an optional solution of this utility model, the upper and lower ends of the plug tail are respectively connected to the plug pin and the side connecting part, the right end is connected to the main connecting part, and a limiting part extends from the upper part of the left end.
[0012] As an optional solution of this utility model, a groove is formed between the upper end of the limiting part and the side connecting part.
[0013] As an optional embodiment of this utility model, a circular protrusion is provided on the front side of the connector portion, and a circular groove is provided on the rear side of the connector portion at a position corresponding to the circular protrusion.
[0014] As an optional embodiment of this invention, the thickness of the nickel layer is 0.5 μm to 2.5 μm.
[0015] As an optional embodiment of this invention, the thickness of the gold layer is 0.5µm to 1µm.
[0016] As an optional embodiment of this utility model, the thickness of the tin layer is 5µm to 7.5µm.
[0017] As an optional embodiment of this utility model, the sum of the areas of the contact surface and the front surface of the guide portion accounts for 1 / 10 to 1 / 6 of the total surface area of the terminal block.
[0018] The terminal block provided in this utility model embodiment has at least one of the following technical effects:
[0019] This application provides a terminal block with a reasonable angle design, namely, the side connection part and the main connection part form a first angle, the contact part and the side connection part form a second angle, the contact part and the main connection part are parallel to each other, and the surface of the contact part away from the main connection part is the contact surface. A nickel layer and a matte tin layer are coated on the front and rear surfaces of the plug part from the inside to the outside, and a nickel layer and a gold layer are coated on the contact surface of the contact part and the front surface of the guide part from the inside to the outside, so as to achieve partial plating of the terminal block and reduce the cost of precious metal plating. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the overall structure of a wiring terminal according to the present invention.
[0022] Figure 2 This is a top view of the terminal block of this utility model.
[0023] Figure 3 This is a schematic diagram of the structure of a wiring terminal according to the present invention.
[0024] Figure 4a This is a side view of a wiring terminal according to the present invention.
[0025] Figure 4b This is a partial enlarged view of point A in the side view of a wiring terminal according to the present invention;
[0026] Figure 5a This is a rear view of a terminal block according to the present invention.
[0027] Figure 5b This is a front view of a wiring terminal according to the present invention.
[0028] The following are the labeling elements in the figure:
[0029] 1. Material strip; 2. Main connecting part; 3. Side connecting part; 4. Contact part; 31. Insert pin; 301. Inserting part; 302. Inserting tail part; 3021. Groove; 3022. Limiting part; 402. Guiding part; 3011. Circular groove; 3012. Circular protrusion; a. First included angle; b. Second included angle; c. Third included angle. Detailed Implementation
[0030] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.
[0031] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on this utility model.
[0032] Furthermore, the terms "first" and "second" 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 as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0033] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.
[0034] In specific embodiments of this utility model, such as Figure 1 As shown, a terminal block is provided, including a main connecting portion 2 located in the middle, and side connecting portions 3 mirror-arranged on the left and right sides of the main connecting portion 2, forming a first included angle α between the side connecting portions 3 and the main connecting portion 2. A contact portion 4 is provided at the free end of the side connecting portion 3, forming a second included angle b between the contact portion 4 and the side connecting portion 3. During production, the main connecting portion 2 is integrally connected to the material strip 1, and the front and rear ends of the main connecting portion 2 are flush with the front and rear ends of the material strip 1.
[0035] Reference Figure 2In a specific embodiment of this utility model, the main connecting part 2, the side connecting part 3, and the contact part 4 are preferably sheet-like structures. The range of the first included angle α is 130° to 140°, and in this embodiment, the first included angle α is preferably set to 135°. The two contact parts 4 extend relative to each other, and the range of the second included angle b is 40° to 50°, and in this embodiment, the second included angle b is preferably set to 45°. The contact part 4 is parallel to the main connecting part 2, and the outer surface of the contact part 4 facing away from the main connecting part 2 is the contact surface that contacts the electrical component. During partial plating, the main connecting part 2 of the terminal block is integrated with the material strip 1, and the terminal block can be automatically plated in batches through the material strip 1. During the automated plating process, the contact surface of the contact part 4 is parallel to the material strip 1, and the contact surface is horizontally facing outward. Whether spot plating, spray plating, or brush plating is used, the contact surface of the contact part 4 can be easily plated. Since the main connection part 2 and the side connection part 3 of the terminal block are not on the same plane as the contact surface, the main connection part 2 and the side connection part 3 of the terminal block will not affect the local plating of the contact surface, further reducing the difficulty of local plating.
[0036] Reference Figure 3 The side connecting part 3 has a plug pin 31 at its upper end. In this specific embodiment, the plug pin 31 is flat and includes a plug head 301 at the top and a plug tail 302 at the bottom. The bottom of the plug head 301 is level with the top of the main connecting part 2, and its main body length is 3.66mm to 3.96mm, preferably 3.81mm in this specific embodiment, used to fix the terminal block to the circuit board. The upper and lower ends of the plug tail 302 are connected to the plug pin 31 and the side connecting part 3, respectively. Its right end is connected to the main connecting part 2, and a limiting part 3022 extends from the upper part of its left end. The length of the limiting part 3022 is 0.77mm to 1.07mm, preferably 0.92mm in this specific embodiment. The limiting part 3022 is used to limit the plug pin 31 from over-insertion, preventing other parts of the terminal block besides the plug head 301 from being inserted into the circuit board. A slot 3021 is formed between the limiting part 3022 and the upper end of the side connecting part 3. When the side connecting part 3 is impacted by an external force, during the process of stress being transmitted to the plug tail part 302, part of the stress will be offset by the slot 3021 in the form of elastic deformation, so as to reduce the damage to the plug part 301 and the circuit board and prevent the plug pin 31 from breaking.
[0037] Reference Figure 4a and Figure 4bA guide portion 402 is provided below the contact portion 4. The included angle between the contact portion 4 and the guide portion 402 is a third included angle c, which ranges from 160° to 170°. In this embodiment of the invention, the third included angle c is preferably set to 165°. When electrical components need to be connected to the terminal block, the design of the third included angle c allows the electrical components to be connected to the contact surface of the contact portion 4 more quickly. Furthermore, when the contact surface of the contact portion 4 and the front surface of the guide portion 402 are partially coated, the near 180° angle design can also reduce the thickness difference between the coating on the contact surface of the contact portion 4 and the coating on the front surface of the guide portion 402.
[0038] Reference Figure 5a and Figure 5b The inner surface of the connector portion 301 is provided with a circular protrusion 3012, and the outer surface of the connector portion 301 is provided with a circular groove 3011 at a position corresponding to the circular protrusion 3012. The circular protrusion 3012 and the circular groove 3011 respectively engage with the groove and protrusion on the circuit board slot to firmly fix the contact terminal on the circuit board slot.
[0039] Preferably, in a specific embodiment of the present invention, the sum of the areas of the contact surface of the contact portion 4 and the front surface of the guide portion 402 accounts for 1 / 10 to 1 / 6 of the total surface area of the terminal block. In a specific embodiment of the present invention, it is preferably 1 / 8. Compared with overall plating, the partial plating scheme of the present invention can significantly reduce plating costs.
[0040] Preferably, in this specific embodiment of the invention, a nickel layer and a matte tin layer are sequentially coated from the inside out on the front and rear surfaces of the connector portion 301, and a nickel layer and a gold layer are sequentially coated from the inside out on the contact surface of the contact portion 4 and the front surface of the guide portion 402, achieving partial plating of the terminals and reducing the cost of precious metal plating. The thickness of the nickel layer on the outer surface of the contact portion 4 and the guide portion 402 ranges from 0.5 μm to 2.5 μm, and the thickness of the gold layer ranges from 0.5 μm to 1 μm. In this specific embodiment of the invention, the thickness of the nickel layer is preferably 1.5 μm, and the thickness of the gold layer is preferably 0.75 μm.
[0041] The thickness of the nickel layer on the surface of the connector portion 301 ranges from 0.5 μm to 2.5 μm, and the thickness of the matte tin layer ranges from 5 μm to 7.5 μm. In a specific embodiment of this utility model, the thickness of the nickel layer is preferably 1.5 μm, and the thickness of the matte tin layer is preferably 6.25 μm.
[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A wiring terminal characterized by comprising: Includes a one-piece main connecting part, two side connecting parts, and two contact parts, wherein: Two side connecting parts are mirrored on the left and right sides of the main connecting part, and a first included angle is formed between the side connecting parts and the main connecting part, the first included angle being 130° to 140°; a plug pin is provided at the upper end of the side connecting part, the plug pin including a plug head and a plug tail provided at the top and bottom, and the front and rear surfaces of the plug head are coated with a nickel layer and a matte tin layer from the inside to the outside; The free end of the side connection portion is provided with the contact portion, and the contact portion and the side connection portion form a second included angle, the second included angle being in the range of 40° to 50°. The contact portion is parallel to the main connection portion, and its surface facing away from the main connection portion is the contact surface. The contact surface is coated with a nickel layer and a gold layer from the inside out.
2. The terminal of claim 1 wherein, A guide portion is provided below the contact portion, and a third angle is formed between the contact portion and the guide portion, the third angle being 160° to 170°.
3. The terminal of claim 2 wherein, The front surface of the guide is coated with a nickel layer and a gold layer from the inside out.
4. The terminal of claim 1 wherein, The upper and lower ends of the plug tail are respectively connected to the plug pin and the side connection part, the right end is connected to the main connection part, and a limiting part extends from the upper part of the left end.
5. The terminal of claim 4 wherein, A groove is formed between the upper end of the limiting part and the side connecting part.
6. The terminal of claim 1 wherein, The front side of the connector has a circular protrusion, and the rear side of the connector has a circular groove at a position corresponding to the circular protrusion.
7. The terminal of any one of claims 1-6, wherein, The thickness of the nickel layer is 0.5 μm to 2.5 μm.
8. The terminal of any one of claims 1-6, wherein, The thickness of the gold layer is 0.5µm to 1µm.
9. The terminal block according to any one of claims 1-6, characterized in that, The thickness of the tin layer is 5µm to 7.5µm.
10. The terminal of claim 2 wherein, The sum of the areas of the contact surface and the front surface of the guide portion accounts for 1 / 10 to 1 / 6 of the total surface area of the terminal block.