A modular combination of a row pin standard product module

Abstract

The application relates to the technical field of pin connector, in particular to a modular combination of pin standard products, which comprises multiple double-row modules and a single-row module, the double-row module comprises a first insulating base and four groups of first metal terminals, the four groups of first metal terminals are arranged in a 2*2P mode, the single-row module comprises a second insulating base and two groups of second metal terminals, the two groups of second metal terminals are arranged in a 1*2P mode, a mortise and tenon joint is arranged between the double-row module and the single-row module, the mortise and tenon joint comprises a joint block, a clamping piece, a first joint groove, a first clamping groove, a first dismounting groove, a second joint groove, a second clamping groove and a second dismounting groove; the double-row module and the single-row module standard block are integrally formed by using a mold, the quality of pin burrs is effectively improved, only two groups of molds are needed, the production cost is effectively reduced, the double-row module and the single-row module are matched, multiple double-number or single-number PIN position pin connectors can be combined, and the mortise and tenon joint effectively improves the stability of the structure of the pin connector.

Description

Technical Field

[0001] This invention relates to the field of pin header connector technology, and more specifically to a modular assembly of standard pin header components. Background Technology

[0002] A pin header connector is a connector composed of rows of metal pins. Pin header connectors are usually used with female headers to form board-to-board connections, or with electronic wire harness terminals to form board-to-wire connections; they can also be used independently for board-to-board connections. It mainly consists of contacts, accessories, insulators, and a housing. The contacts are the core components of the connector, consisting of anode and cathode contacts. The contact pairs are completed by the mating of the anode and cathode contacts, providing electrical connection performance for the pin header connector. As electronic equipment has increasingly higher precision requirements, the requirements for the precision and reliability of pin header connectors are also increasing. Especially in high-end electronic equipment, the burr problem of the connector directly affects the soldering quality and long-term stability of the product.

[0003] Currently, there are two main solutions in the industry. The first is to use a long strip of plastic with the largest pin, insert the terminal, and then cut it to the required number of pins. Due to limitations of the cutting tools (the thinnest cutting blade can only be 0.20mm thick), the burrs after cutting are too large, and manual trimming with a blade is necessary. This severely restricts production efficiency and product consistency. Moreover, manual trimming is irregular, and the burrs cannot be completely eliminated, exceeding the standards of most high-end customers. Manual trimming is also prone to cutting the terminal or breaking the plastic, causing product scrap and a high defect rate. Even after manual trimming, the burrs cannot be completely eliminated. Some burrs are so long that they may reach the soldering board surface, which may cause the product to float during soldering, resulting in poor soldering and scrap. The second solution is to create a new mold for the corresponding number of pins required by the customer. This can effectively ensure that the burrs meet the requirements, but each required number of pins is different, requiring new molds and corresponding assembly and manufacturing costs, resulting in high costs and difficulty in adapting to rapidly changing market demands.

[0004] Therefore, it is necessary to invent a modular combination of standard pin headers to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a modular assembly of standard pin headers to solve the problems in the technology where the burrs after cutting are too large, requiring manual processing and cannot be completely removed; manual burr trimming easily damages terminals and plastics, resulting in a high defect rate; and the cost of separate mold opening is high, making it impossible to flexibly meet diverse pin position requirements.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a modular assembly of standard pin headers, comprising multiple sets of double-row modules and one set of single-row modules. The double-row modules include a first insulating base and four sets of first metal terminals, the four sets of first metal terminals being arranged in a 2*2P configuration. The single-row module includes a second insulating base and two sets of second metal terminals, the two sets of second metal terminals being arranged in a 1*2P configuration. A tenon-and-mortise joint is provided between the double-row modules and the single-row modules. The tenon-and-mortise joint includes a splicing block, a snap-fit ​​piece, a first splicing groove, a first snap-fit ​​groove, a first disassembly groove, a second splicing groove, a second snap-fit ​​groove, and a second disassembly groove.

[0007] By adopting the above technical solution, multiple sets of double-row modules can be combined to form multiple sets of even-numbered PIN positions. By combining multiple sets of double-row modules and single-row modules, any number of odd-numbered PIN positions can be formed. Furthermore, the mortise and tenon joints effectively improve the stability of the connection between the double-row modules and the single-row modules, ensuring the stability of the product structure.

[0008] Optionally, the splicing block is fixedly connected to the right side surface of the first insulating base, and the snap-fit ​​piece is fixedly connected to the right side surface of the splicing block.

[0009] By adopting the above technical solution, the splicing block is a dovetail protrusion, and the dovetail protrusion is larger at the top and smaller at the bottom.

[0010] Optionally, the first splicing groove is formed on the left side surface of the first insulating base, and the first snap-fit ​​groove is formed on the right side surface of the first splicing groove.

[0011] By adopting the above technical solution, the splicing block is inserted into the first splicing groove, and the snap-fit ​​piece is inserted into the first snap-fit ​​groove, which can lock and fix the two adjacent sets of first insulating bases.

[0012] Optionally, the first disassembly groove is formed on the lower surface of the first insulating base, and the upper end of the first disassembly groove communicates with the lower end of the first snap-fit ​​groove.

[0013] By adopting the above technical solution, the pin is inserted into the first snap-fit ​​groove to squeeze the snap-fit ​​piece, causing it to detach from the first snap-fit ​​groove, thus disassembling the two sets of first insulating bases.

[0014] Optionally, the second splicing groove is formed on the left side surface of the second insulating base, and the second snap-fit ​​groove is formed on the right side surface of the second splicing groove.

[0015] By adopting the above technical solution, the splicing block is inserted into the interior of the second splicing groove, and the snap-fit ​​piece is inserted into the interior of the second snap-fit ​​groove, so that the first insulating base and the second insulating base can be locked and fixed.

[0016] Optionally, the second disassembly groove is formed on the lower surface of the second insulating base, and the upper end of the second disassembly groove communicates with the lower end of the second snap-fit ​​groove.

[0017] By adopting the above technical solution, the pin is inserted into the second snap-fit ​​groove from the second disassembly groove, and the snap-fit ​​is squeezed to disassemble it from the second snap-fit ​​groove, thereby disassembling the first insulating base and the second insulating base.

[0018] Optionally, the first insulating base has four sets of first mounting holes inside, and the four sets of first metal terminals are respectively fixed inside the four sets of first mounting holes.

[0019] By adopting the above technical solution, the sidewall of the first mounting hole is provided with a wave-shaped anti-slip protrusion, which improves the stability of the connection between the first metal terminal and the first mounting hole and effectively prevents the first metal terminal from falling off.

[0020] Optionally, the second insulating base has two sets of second mounting holes inside, and the two sets of second metal terminals are respectively fixed inside the two sets of second mounting holes.

[0021] By adopting the above technical solution, wavy anti-slip protrusions are provided on the side wall of the second mounting hole to improve the stability of the connection between the second metal terminal and the second mounting hole and effectively prevent the second metal terminal from falling off.

[0022] Optionally, a limiting groove is formed at the middle position of both the front and rear surfaces of the first insulating base, a first half-groove is formed at the right end of both the front and rear surfaces of the first insulating base, a second half-groove is formed at the left end of both the front and rear surfaces of the first insulating base, and a first protrusion is fixedly connected to both the front and rear sides of the lower surface of the first insulating base.

[0023] By adopting the above technical solution, two adjacent sets of first half-grooves and second half-grooves can be spliced ​​together to form a complete limiting groove. The limiting groove is used to cooperate with the mounting base to improve the stability of the pin header connector during installation and use.

[0024] Optionally, a third semi-groove is provided at the left end of both the front and rear surfaces of the second insulating base, a fourth semi-groove is provided at the right end of both the front and rear surfaces of the second insulating base, and a second protrusion is fixedly connected to both the front and rear sides of the lower surface of the second insulating base.

[0025] By adopting the above technical solution, the first half-groove and the third half-groove can also be spliced ​​together to form a complete limiting groove.

[0026] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0027] 1. This invention decomposes the pin header connector into two standard modules: a dual-row module and a single-row module. Both dual-row and single-row modules are integrally molded using a mold, effectively improving the quality of pin header burrs. Multiple dual-row modules can be combined to form multiple even-numbered pin positions, while multiple dual-row and single-row modules can be combined to form any odd-numbered pin position. No separate mold is required, effectively reducing production costs. Furthermore, the mortise and tenon joints effectively improve the stability of the connection between the dual-row and single-row modules, ensuring the stability of the product structure.

[0028] 2. This invention allows for the disassembly of two sets of first insulating bases by inserting a pin through the first disassembly groove into the first snap-fit ​​groove and pressing the snap-fit ​​piece to detach it from the first snap-fit ​​groove. Simultaneously, the invention allows for the disassembly of the first and second insulating bases by inserting a pin through the second disassembly groove into the second snap-fit ​​groove and pressing the snap-fit ​​piece to detach it from the second snap-fit ​​groove. This facilitates the disassembly of incorrectly assembled products and improves the ease of product installation.

[0029] 3. The present invention provides a limiting groove, a first half-groove, a second half-groove, a third half-groove, and a fourth half-groove on the surfaces of the first insulating base and the second insulating base, respectively. Two adjacent sets of first half-grooves and second half-grooves, or the first half-groove and the third half-groove, can be spliced ​​together to form a complete limiting groove. Through the cooperation of multiple sets of limiting grooves, the stability and structural strength of the connection between the pin header connector and the base are effectively improved. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the right side structure of the dual-row module of the present invention;

[0032] Figure 3 This is a schematic diagram of the left side structure of the dual-row module of the present invention;

[0033] Figure 4 This is a schematic diagram of the right side structure of the first insulating base of the present invention;

[0034] Figure 5 This is a schematic diagram of the left side structure of the first insulating base of the present invention;

[0035] Figure 6 This is a schematic diagram of the lower structure of the first insulating base of the present invention;

[0036] Figure 7 This is a schematic diagram of the right side structure of the single-row module of the present invention;

[0037] Figure 8 This is a schematic diagram of the left side structure of the single-row module of the present invention;

[0038] Figure 9 This is a schematic diagram of the left side structure of the second insulating base of the present invention;

[0039] Figure 10 This is a schematic diagram of the lower structure of the second insulating base of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Double-row module; 11. First insulating base; 12. Splicing block; 13. Snap-fit ​​piece; 14. First splicing groove; 15. First snap-fit ​​groove; 16. First disassembly groove; 17. Limiting groove; 18. First half-groove; 19. Second half-groove; 110. First protrusion; 111. First mounting hole; 112. First metal terminal; 2. Single-row module; 21. Second insulating base; 22. Second splicing groove; 23. Second snap-fit ​​groove; 24. Second disassembly groove; 25. Second protrusion; 26. Second mounting hole; 27. Second metal terminal; 28. Third half-groove; 29. ​​Fourth half-groove. Detailed Implementation

[0042] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0043] Example 1:

[0044] This invention provides, for example Figures 1 to 10 The illustrated modular assembly of a pin header standard includes multiple double-row modules 1 and one single-row module 2. The double-row module 1 includes a first insulating base 11 and four sets of first metal terminals 112. The first insulating base 11 has four sets of first mounting holes 111 inside, and the four sets of first metal terminals 112 are respectively fixed inside the four sets of first mounting holes 111. The four sets of first metal terminals 112 are arranged in a 2*2P configuration. The single-row module 2 includes a second insulating base 21 and two sets of second metal terminals 2. 7. The interior of the second insulating base 21 is provided with two sets of second mounting holes 26. Two sets of second metal terminals 27 are respectively fixed inside the two sets of second mounting holes 26. The two sets of second metal terminals 27 are arranged in a 1*2P pattern. A tenon and mortise splicing component is provided between the double-row module 1 and the single-row module 2. The tenon and mortise splicing component includes a splicing block 12, a snap-fit ​​piece 13, a first splicing groove 14, a first snap-fit ​​groove 15, a first disassembly groove 16, a second splicing groove 22, a second snap-fit ​​groove 23, and a second disassembly groove 24.

[0045] Both the dual-row module 1 and the single-row module 2 are standard modules. Both are molded, which effectively reduces the burrs on the surfaces of the first metal terminal 112 and the second metal terminal 27, improving the quality of the pin header connector. At the same time, the inner walls of the first mounting hole 111 and the second mounting hole 26 are provided with wavy anti-slip protrusions, which effectively improves the stability of the first metal terminal 112 and the second metal terminal 27, effectively preventing the first metal terminal 112 and the second metal terminal 27 from loosening, improving their structural strength during production, installation and use, and improving the product connection quality.

[0046] Meanwhile, for the production of dual-row module 1 and single-row module 2, only two sets of molds are needed. Dual-row module 1 and single-row module 2 can be mass-produced using these two sets of molds. During the installation process, for pin header connectors with different numbers of rows, multiple sets of dual-row module 1 and single-row module 2 are combined and spliced ​​to complete the preparation of the corresponding products. For example, in even-numbered pin header connectors, multiple sets of dual-row module 1 are spliced ​​together to create a pin header connector with an even number of pins. In odd-numbered pin header connectors, one set of dual-row module 1 and one set of single-row module 2 are spliced ​​together first, and then multiple sets of single-row module 2 are spliced ​​sequentially on the left side of single-row module 2 to create a pin header connector with an odd number of pins. Tenon and mortise splicing parts are used to splice and fix adjacent sets of dual-row module 1 or between dual-row module 1 and single-row module 2 to improve the stability of the pin header connector structure.

[0047] In addition, in this embodiment, the metal terminals in the dual-row module 1 and the single-row module 2 are 2*2P and 1*2P respectively, that is, 2 rows * 2 rows and 1 row * 2 rows. At the same time, for pin header connectors with different row numbers, such as including but not limited to 1 row or 3 row pin header connectors, corresponding standard modules with different row numbers such as 2*1P and 1*1P or 2*3P and 1*3P can be produced. Using standard modules to splice and produce pin header connectors, it is not necessary to open molds separately for pin header connectors with different PIN positions, which effectively reduces the number of molds and thus effectively reduces the cost of mold opening, thereby reducing the overall production cost of the product. Corresponding pin header connectors can be quickly produced for pin header connectors with different PIN positions, so that they can be quickly adapted to new market demands.

[0048] In a preferred embodiment, the splicing block 12 is fixedly connected to the right side surface of the first insulating base 11, the snap-fit ​​piece 13 is fixedly connected to the right side surface of the splicing block 12, the first splicing groove 14 is formed on the left side surface of the first insulating base 11, the first snap-fit ​​groove 15 is formed on the right side surface of the first splicing groove 14, the first disassembly groove 16 is formed on the lower surface of the first insulating base 11, the upper end of the first disassembly groove 16 communicates with the lower end of the first snap-fit ​​groove 15, the second splicing groove 22 is formed on the left side surface of the second insulating base 21, the second snap-fit ​​groove 23 is formed on the right side surface of the second splicing groove 22, and the second disassembly groove 24 is formed on the lower surface of the second insulating base 21, the upper end of the second disassembly groove 24 communicates with the lower end of the second snap-fit ​​groove 23.

[0049] Specifically, both the first splicing groove 14 and the second splicing groove 22 are dovetail grooves, and the splicing block 12 is a dovetail boss. Both the dovetail groove and the dovetail boss are larger at the top and smaller at the bottom, forming a wedge-shaped tenon and mortise structure. The upper and lower ends of the dovetail groove and the dovetail boss are rounded and chamfered to facilitate splicing and assembly. When the dovetail boss-shaped splicing block 12 is inserted into the dovetail groove-shaped first splicing groove 14 and the second splicing groove 22, due to the characteristics of the dovetail boss and the dovetail groove, the splicing block 12 is prevented from slipping off the side of the first splicing groove 14 or the second splicing groove 22, thereby maintaining the stability of the multiple sets of first insulating bases 11 and second insulating bases 21 in the left and right directions.

[0050] Meanwhile, the snap-fit ​​piece 13 has a certain elasticity, and the splicing block 12 has a slot on the side of the snap-fit ​​piece 13. When the snap-fit ​​piece 13 is subjected to external pressure, it will be compressed inward, so that the snap-fit ​​piece 13 can be snapped into the slot. Conversely, when the external pressure on the snap-fit ​​piece 13 disappears, it will pop out from the slot under its own elastic force and connect to the right side surface of the splicing block 12 in an inclined upward state. During the installation process, after the splicing block 12 is snapped into the first splicing groove 14 and the second splicing groove 22, the snap-fit ​​piece 13 will abut against the inside of the first snap-fit ​​groove 15 or the second snap-fit ​​groove 23, limiting the vertical direction of the splicing block 12, so that the splicing block 12 maintains vertical stability inside the first splicing groove 14 and the second splicing groove 22, and locking and fixing the first insulating base 11 and the second insulating base 21 vertically.

[0051] In the production process of the even-numbered pin header connector, multiple sets of dual-row modules 1 are spliced ​​together. During the splicing process, two sets of dual-row modules 1 are placed side by side. The splicing block 12 at the right end of the left first insulating base 11 is inserted from top to bottom into the first splicing groove 14 at the left end of the right first insulating base 11. As the splicing block 12 slides downward inside the first splicing groove 14, the side wall of the first splicing groove 14 limits the locking piece 13, thereby pushing the locking piece 13 to the left so that the locking piece 13 is engaged inside the groove. At this time, the right surface of the splicing block 12 will be in a flat state, thus allowing the splicing block 12 to smoothly descend. When the splicing block 12 slides to the bottom of the first splicing groove 14, the snap-fit ​​piece 13 will move to the side of the first snap-fit ​​groove 15. The snap-fit ​​piece 13, which lacks a limit, will pop out directly under its own elastic force. The upper end of the snap-fit ​​piece 13 will be stuck on the upper wall of the first snap-fit ​​groove 15 to support the splicing block 12 and fix the splicing block 12 tightly inside the first splicing groove 14. In this way, the two sets of first insulating bases 11 are tightly connected and fixed. In this way, multiple sets of double row modules 1 are spliced ​​and fixed together in sequence until a pin header connector with a corresponding number of pins is spliced, thus completing the production of pin header connectors with an even number of pins.

[0052] In addition, during the production process of pin header connectors with an odd number of pins, the dual-row module 1 and the single-row module 2 are first spliced ​​together. During the splicing process, the dual-row module 1 is placed to the left of the single-row module 2. The splicing block 12 at the right end of the first insulating base 11 is inserted from top to bottom into the second splicing groove 22 at the left end of the second insulating base 21. As the splicing block 12 slides downward inside the second splicing groove 22, the side wall of the second splicing groove 22 limits the locking piece 13, thereby pushing the locking piece 13 to the left so that the locking piece 13 is engaged inside the groove. At this time, the right surface of the splicing block 12 will be in a flat state, allowing the splicing block 12 to slide smoothly into the second splicing groove. Inside the slot 22, when the splicing block 12 is fully inserted into the second splicing slot 22, the snap-fit ​​piece 13 will move to the side of the second snap-fit ​​slot 23. The snap-fit ​​piece 13 without a limit will pop out directly, and its upper end will be stuck on the upper wall of the second snap-fit ​​slot 23, tightly fixing the splicing block 12 inside the second splicing slot 22, thereby tightly connecting and fixing the two sets of second insulating bases 21, and splicing the dual-row module 1 and the single-row module 2 together. Next, following the splicing method of even-numbered pin header connectors, multiple sets of other dual-row modules 1 are spliced ​​sequentially on the left side of the dual-row module 1 to complete the splicing of the odd-numbered pin header connectors.

[0053] Meanwhile, during the splicing process of the double-row module 1 and the single-row module 2, when an excess double-row module 1 or single-row module 2 is spliced, the pin is passed from bottom to top through the first disassembly groove 16 or the second disassembly groove 24, and the upper end of the pin is inserted into the first snap-fit ​​groove 15 or the second snap-fit ​​groove 23. As the pin slides upward, it will squeeze the snap-fit ​​piece 13, thereby causing the snap-fit ​​piece 13 to rotate into the groove. At this time, the splicing block 12 can slide upward smoothly, thereby removing the splicing block 12 from the first splicing groove 14 or the second splicing groove 22, and disassembling the double-row module 1 or the single-row module 2, further improving the ease of use of the equipment.

[0054] Example 2:

[0055] See Figure 1 , Figure 2 and Figure 7 Limiting grooves 17 are provided in the middle of the front and rear surfaces of the first insulating base 11. A first half-groove 18 is provided at the right end of the front and rear surfaces of the first insulating base 11. A second half-groove 19 is provided at the left end of the front and rear surfaces of the first insulating base 11. A first protrusion 110 is fixedly connected to the front and rear sides of the lower surface of the first insulating base 11. A third half-groove 28 is provided at the left end of the front and rear surfaces of the second insulating base 21. A fourth half-groove 29 is provided at the right end of the front and rear surfaces of the second insulating base 21. A second protrusion 25 is fixedly connected to the front and rear sides of the lower surface of the second insulating base 21.

[0056] The limiting groove 17 is used to cooperate with the protrusion inside the base to limit the position of the pin header connector, thereby improving the stability of the pin header connector during installation.

[0057] In addition, during the splicing of the dual-row module 1 and the single-row module 2, the first half-groove 18 and the second half-groove 19 between two adjacent sets of dual-row modules 1 can be spliced ​​into a complete limiting groove 17, and the first half-groove 18 and the third half-groove 28 between dual-row module 1 and single-row module 2 can also be spliced ​​into a complete limiting groove 17. By using multiple sets of limiting grooves 17 in cooperation, the stability of the pin header connector during the installation process can be effectively improved.

[0058] The working principle of this invention is as follows: The pin header connector is decomposed into two standard modules: dual-row module 1 and single-row module 2. Both dual-row module 1 and single-row module 2 are integrally molded using a single mold, effectively improving the quality of pin header burrs and eliminating the need for separate mold opening, thus effectively reducing production costs. Furthermore, multiple sets of dual-row module 1 can be combined to form multiple even-numbered pin positions, and multiple sets of dual-row module 1 and single-row module 2 can be combined to form any odd-numbered pin position. The mortise and tenon joint effectively improves the stability of the connection between dual-row module 1 and single-row module 2, ensuring the stability of the product structure. Simultaneously, by inserting the pin through the first... A disassembly groove 16 is inserted into the first snap-fit ​​groove 15 to press the snap-fit ​​piece 13 out of the first snap-fit ​​groove 15, allowing the two sets of first insulating bases 11 to be disassembled. Similarly, the first insulating base 11 and the second insulating base 21 can be disassembled, facilitating the disassembly of incorrectly assembled products and improving the ease of product installation. Furthermore, two adjacent sets of first half-grooves 18 and second half-grooves 19, or the first half-grooves 18 and the third half-grooves 28, can be spliced ​​to form a complete limiting groove 17. Through the cooperation of multiple sets of limiting grooves 17, the stability and structural strength of the connection between the pin header connector and the base are effectively improved.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A modular assembly of standard pin headers, comprising multiple double-row modules (1) and one single-row module (2), characterized in that: The dual-row module (1) includes a first insulating base (11) and four first metal terminals (112). The four first metal terminals (112) are arranged in two rows, with two first metal terminals (112) in each row. The single-row module (2) includes a second insulating base (21) and two second metal terminals (27). The two second metal terminals (27) are arranged in one row. A tenon and mortise splicing component is provided between the dual-row module (1) and the single-row module (2). The tenon and mortise splicing component includes a splicing block (12), a snap-fit ​​piece (13), a first splicing groove (14), a first snap-fit ​​groove (15), a first disassembly groove (16), a second splicing groove (22), a second snap-fit ​​groove (23), and a second disassembly groove (24). The first splicing groove (14) is opened on the left side surface of the first insulating base (11), the first snap-fit ​​groove (15) is opened on the right side surface of the first splicing groove (14), the first disassembly groove (16) is opened on the lower surface of the first insulating base (11), and the upper end of the first disassembly groove (16) is connected to the lower end of the first snap-fit ​​groove (15). The first insulating base (11) has a first half-groove (18) at the right end of both the front and rear surfaces, a second half-groove (19) at the left end of both the front and rear surfaces, a third half-groove (28) at the left end of both the front and rear surfaces, and a fourth half-groove (29) at the right end of both the front and rear surfaces. The first insulating base (11) has a first protrusion (110) fixedly connected to both the front and rear sides of the lower surface, and the second insulating base (21) has a second protrusion (25) fixedly connected to both the front and rear sides of the lower surface.

2. The modular assembly of standard pin headers according to claim 1, characterized in that: The splicing block (12) is fixedly connected to the right side surface of the first insulating base (11).

3. The modular assembly of standard pin headers according to claim 2, characterized in that: The snap-fit ​​piece (13) is fixedly connected to the right side surface of the splicing block (12).

4. The modular assembly of standard pin headers according to claim 1, characterized in that: The second splicing groove (22) is formed on the left side surface of the second insulating base (21).

5. The modular assembly of standard pin headers according to claim 4, characterized in that: The second snap-fit ​​groove (23) is formed on the right side surface of the second splicing groove (22).

6. The modular assembly of standard pin headers according to claim 1, characterized in that: The second disassembly groove (24) is formed on the lower surface of the second insulating base (21), and the upper end of the second disassembly groove (24) is connected to the lower end of the second snap-fit ​​groove (23).

7. The modular assembly of standard pin headers according to claim 1, characterized in that: The first insulating base (11) has four first mounting holes (111) inside, and the four first metal terminals (112) are respectively fixed inside the four first mounting holes (111).

8. The modular assembly of standard pin headers according to claim 1, characterized in that: The second insulating base (21) has two second mounting holes (26) inside, and the two second metal terminals (27) are respectively fixed inside the two second mounting holes (26).

9. A modular assembly of standard pin headers according to claim 1, characterized in that: Limiting grooves (17) are provided at the middle positions of the front and rear surfaces of the first insulating base (11).

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