Multi-angle built-in high-retention high-reliability connector for wire-to-board

Abstract

The application discloses a multi-angle built-in high-retention high-reliability wire-to-board connector, and belongs to the technical field of electrical connectors. The connector comprises a plug, annular contact terminals, a multi-angle built-in structure, a needle seat, needle terminals and double pressure-proof locking pieces. A plurality of circular terminal built-in holes are formed in the plug. A through hole is formed in the side wall of the terminal built-in hole. The annular contact terminals are hollow cylindrical structures and are installed in the interior of the terminal built-in hole. The multi-angle built-in structure is arranged on the terminal built-in hole and the annular contact terminals. A connecting chamber is formed in the interior of the needle seat. A plurality of terminal mounting holes are formed in the side wall of the connecting chamber. The plug is inserted into the connecting chamber. The needle terminals are installed in the interior of the terminal mounting holes. One end of the needle terminal penetrates through the through hole and forms electrical conduction with the annular contact terminals in the terminal built-in hole. The double pressure-proof locking pieces are clamped on the outer side wall of the plug. The application has high installation flexibility, connection stability and high reliability.

Description

Technical Field

[0001] This invention relates to the field of electrical connector technology, and more specifically to a multi-angle insertion type high holding force and high reliability wire-to-board connector. Background Technology

[0002] Wire-to-board connectors are fundamental electronic components used to make pluggable electrical connections between wires or cables and printed circuit boards. They are widely used in consumer electronics, automotive electronics, industrial control, and communication equipment. Primarily responsible for power transmission, signal conduction, and structural connection, they are indispensable basic interconnect components in electronic systems. Wire-to-board connectors require high levels of smooth insertion, stable electrical contact, and reliability to prevent accidental loosening.

[0003] However, existing wire-to-board connectors still have some problems. First, the terminal insertion method of traditional connectors usually adopts a single-angle or limited-angle positioning design, which often requires the use of a foolproof structure to ensure correct insertion. This not only increases the assembly difficulty but also limits the flexibility of use. Especially in confined or poorly visible operating spaces, alignment difficulties can easily lead to low assembly efficiency or terminal damage. Second, the holding force of existing terminals mainly relies on the cooperation between barbs and the housing. However, the barb layout is not reasonable enough, and the holding force is unevenly distributed. With long-term use or under large insertion and extraction forces, it is easy to loosen or even come out, reducing the reliability of the connector. Third, traditional locking plates are prone to drooping and deformation when subjected to external pressure, leading to locking failure and increasing the risk of accidental disengagement between the plug and the pin seat.

[0004] Therefore, how to provide a multi-angle insertion type high holding force and high reliability wire-to-board connector to overcome the defects in the existing technology is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] To address these issues, the present invention provides a multi-angle insertion type high-holding-force, high-reliability wire-to-board connector, which solves the problems of low assembly efficiency, poor operational flexibility, uneven holding force distribution, easy loosening and withdrawal of terminals, and accidental detachment of plugs and pin seats caused by the single terminal insertion angle, unreasonable barb layout, and easy deformation of locking plates under pressure in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention discloses a multi-angle insertion type high-holding-force, high-reliability wire-to-board connector, comprising: The plug has several circular terminal insertion holes inside, and through holes are provided on the side walls of the terminal insertion holes. The annular contact terminal has a hollow cylindrical structure and is installed inside the terminal insertion hole; A multi-angle insertion structure is respectively provided on the terminal insertion hole and the annular contact terminal. When the annular contact terminal is plugged into the plug, the multi-angle insertion structure enables the annular contact terminal to be fixed in the terminal insertion hole from multiple angles. The pin socket has a connecting chamber inside, and the side wall of the connecting chamber has several terminal mounting holes, and the plug is inserted into the connecting chamber. A pin terminal is installed inside the terminal mounting hole, with one end of the pin terminal passing through the through hole and forming an electrical connection with the annular contact terminal inside the terminal insertion hole; A double anti-pressure locking plate is snapped onto the outer wall of the plug.

[0007] Furthermore, the multi-angle insertion structure includes: Several insertion slots are formed axially on the inner wall of the terminal insertion hole and are distributed in a circumferential array with equal spacing along the circumference of the terminal insertion hole. Several barbs are arranged circumferentially on the outer wall of the annular contact terminal, and the barbs are engaged in the insertion groove; The insertion slot includes an insertion section and a snap-fit ​​section. The insertion section has a driving slope at one end near the snap-fit ​​section. When the annular contact terminal is inserted into the plug, the barb snaps into the snap-fit ​​section.

[0008] Furthermore, the number of the insertion slots is 8, and the number of the barbs is 7.

[0009] Furthermore, a portion of the sidewall of the annular contact terminal is bent inward in the circumferential direction to form an annular contact point. Two annular contact points are provided, and the two annular contact points are arranged along the axial direction of the annular contact terminal. The annular contact terminal forms an electrical connection with the pin terminal through the two annular contact points.

[0010] Furthermore, a first snap-fit ​​block is provided on the top surface of the connecting chamber, a connecting spring is formed on the top wall of the plug, the end of the connecting spring extends outward and forms a pressing block, a second snap-fit ​​block is provided on the top of the connecting spring to cooperate with the first snap-fit ​​block, an anti-pressure tongue is formed on the top of the double anti-pressure locking plate, and an anti-pressure block is formed on the top of the anti-pressure tongue. When the double anti-pressure locking plate is snapped into the plug, the anti-pressure tongue is inserted into the bottom of the connecting spring, and the anti-pressure block is inserted into the bottom of the pressing block.

[0011] Furthermore, the bottom of the dual anti-pressure locking plate is provided with a clearance groove for avoiding the annular contact terminal.

[0012] Furthermore, a third locking block is formed on each of the two opposite outer side walls of the plug, and a locking groove is formed on each of the two opposite outer side walls of the double anti-pressure locking plate. The double anti-pressure locking plate is engaged with the plug through the third locking block.

[0013] Furthermore, the sidewall of the second snap-fit ​​block that contacts the first snap-fit ​​block is beveled.

[0014] The present invention has the following advantages: This invention, by setting a multi-angle insertion structure, enables the annular contact terminal to be fixedly installed in the terminal insertion hole of the plug from multiple angles. Users do not need to align it with a specific foolproof position, and can complete the insertion at multiple insertion angles. This not only greatly reduces the assembly difficulty and improves the operational flexibility in narrow or invisible spaces, but also effectively avoids the problem of terminal damage caused by alignment difficulties.

[0015] By incorporating a barb-and-groove mating structure, the annular contact terminal provides a strong and evenly distributed retaining force after insertion, thanks to the engagement of the barbs and the locking section. This design not only eliminates the need for additional foolproof structures or locking tabs to secure the terminal, simplifying the overall structure, but also enhances the terminal's resistance to accidental detachment due to the barbs functioning simultaneously at multiple angles, significantly improving the connector's durability and long-term reliability.

[0016] By setting two annular contact points on the annular contact terminal, a two-point contact continuity is formed between the pin terminal and the annular contact terminal. Compared with the traditional single-point or single-ring contact method, this design significantly increases the contact area, reduces the contact resistance, and improves the conductivity. At the same time, the dual-contact structure can provide redundant contact protection under vibration or shock environments, effectively preventing instantaneous disconnection or poor contact, thereby greatly improving the stability and reliability of the electrical connection.

[0017] By incorporating a dual anti-pressure locking mechanism, the locking plates effectively resist external pressure. When the dual anti-pressure locking plates engage with the plug, the anti-pressure tongue supports the connecting spring from the bottom, and the anti-pressure block supports the pressing block, forming a dual anti-pressure support. This structure completely solves the problem of traditional locking plates easily collapsing and deforming under external force, preventing the plug from accidentally disengaging from the pin socket due to locking failure, and further ensuring the stability and safety of the insertion state. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0020] Figure 1 A perspective view of the multi-angle insertion type high holding force and high reliability wire-to-board connector provided by the present invention; Figure 2 A cross-sectional view of the terminal insertion hole provided by the present invention; Figure 3 A cross-sectional view of the terminal insertion hole provided by the present invention; Figure 4 Cross-sectional view of the multi-angle insertion type high holding force and high reliability wire-to-board connector provided by the present invention; Figure 5 A perspective view of the plug provided for this invention; Figure 6 The plug structure diagram provided by this invention; Figure 7 A perspective view of the annular contact terminal provided by the present invention; Figure 8 Right view of the annular contact terminal provided by the present invention; Figure 9 A perspective view of the needle holder provided by the present invention; Figure 10 A perspective view of the dual anti-pressure locking plate provided by the present invention.

[0021] In the diagram: 1. Plug; 11. Terminal insertion hole; 12. Through hole; 13. Connecting spring; 14. Pressing block; 15. Second locking block; 16. Third locking block; 2. Annular contact terminal; 21. Annular contact point; 3. Pin seat; 31. Connecting chamber; 32. Terminal mounting hole; 33. Pin terminal; 34. First locking block; 4. Double anti-pressure locking plate; 41. Anti-pressure tongue; 42. Anti-pressure block; 43. Clearance groove; 44. Locking groove; 51. Insertion groove; 511. Insertion section; 512. Locking section; 513. Drive slope; 52. Barb. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please refer to Figures 1-10 The multi-angle insertion type high holding force and high reliability wire-pair board connector disclosed in this invention will now be described. This invention consists of 6 parts, as follows: Figure 1 , Figure 5 , Figure 7 , Figure 9 , Figure 10 As shown, the device includes a plug 1, annular contact terminals 2, a multi-angle insertion structure, a pin holder 3, pin terminals 33, and a double anti-pressure locking plate 4. The plug 1 has several circular terminal insertion holes 11 inside, and through holes 12 are provided on the side walls of the terminal insertion holes 11. The annular contact terminals 2 are hollow cylindrical structures and are installed inside the terminal insertion holes 11. The multi-angle insertion structure is respectively provided on the terminal insertion holes 11 and the annular contact terminals 2. When the annular contact terminals 2 are plugged into the plug 1, the multi-angle insertion structure allows the annular contact terminals 2 to be fixed in the terminal insertion holes 11 from multiple angles. The pin holder 3 has a connecting chamber 31 inside, and several terminal mounting holes 32 are provided on the side walls of the connecting chamber 31. The plug 1 is plugged into the connecting chamber 31. The pin terminals 33 are installed inside the terminal mounting holes 32. One end of the pin terminals 33 passes through the through holes 12 and forms an electrical connection with the annular contact terminals 2 in the terminal insertion holes 11. The double anti-pressure locking plate 4 is snapped onto the outer side wall of the plug 1.

[0024] In this embodiment, the installation positions of the plug 1, pin socket 3, annular contact terminal 2, and double anti-pressure locking plate 4 are as follows: Figure 1 As shown. This application offers greater flexibility, stability, and reliability through its unique multi-angle insertion design, annular double contact terminal design, barbed 52 retaining force enhancement design, and dual anti-pressure locking plate 4 design.

[0025] The annular contact terminal 2 is inserted into the plug 1 through the terminal insertion hole 11. The plug 1 is inserted into the pin holder 3 through the connecting chamber 31. The pin terminal 33 is installed in the pin holder 3 through the terminal mounting hole 32. The terminal insertion hole 11, the through hole 12, and the terminal mounting hole 32 are located on the same axis. The front end of the annular contact terminal 2 is cylindrical. The pin terminal 33 can pass through the through hole 12 into the interior of the annular contact terminal 2 and form an electrical connection with the annular contact terminal 2.

[0026] A multi-angle insertion structure is set between the plug 1 and the annular contact terminal 2. By setting a multi-angle insertion structure, the annular contact terminal 2 can be fixedly installed in the terminal insertion hole 11 of the plug 1 from multiple angles. Users do not need to align with a specific foolproof position and can complete the insertion at multiple insertion angles. This not only greatly reduces the assembly difficulty and improves the operational flexibility in narrow or invisible spaces, but also effectively avoids the problem of terminal damage caused by alignment difficulties.

[0027] like Figure 2 , Figure 3 , Figure 5 , Figure 7 , Figure 8 As shown, the multi-angle insertion structure includes insertion grooves 51 and barbs 52. Several insertion grooves 51 are axially opened on the inner sidewall of the terminal insertion hole 11 and are distributed in a circumferential array with equal spacing along the circumference of the terminal insertion hole 11. Several barbs 52 are circumferentially arranged on the outer sidewall of the annular contact terminal 2. The barbs 52 are engaged in the insertion grooves 51. The insertion groove 51 includes an insertion section 511 and a engaging section 512. A driving inclined surface 513 is formed at one end of the insertion section 511 near the engaging section 512. When the annular contact terminal 2 is inserted into the plug 1, the barbs 52 are engaged in the engaging section 512.

[0028] In this embodiment, the specific structure of the annular contact terminal 2 is as follows: Figure 7 , Figure 8 As shown. The annular contact terminal 2 is made by bending a punched metal sheet into a cylindrical structure. One end is used to connect the cable, and this part includes a wire-pressing part for connecting the metal part of the cable and a covering part for covering the cable. The other end is used to connect to the pin terminal 33. The barb 52 is integrally formed with the annular contact terminal 2. The barb 52 is formed by bending a portion of the side wall of the annular contact terminal 2 outward after cutting.

[0029] The insertion slot 51 has a two-section structure design. The section near the opening of the terminal insertion hole 11 is the insertion section 511, and the section inside the terminal insertion hole 11 is the snap-fit ​​section 512. During the process of the annular contact terminal 2 entering the terminal insertion hole 11, the barb 52 is pressed by the inner wall of the insertion section 511 and undergoes elastic deformation until it passes through the driving inclined surface 513. Then, it recovers its deformation in the snap-fit ​​section 512. The end of the snap-fit ​​section 512 near the insertion section 511 has a vertical surface structure, which can form a snap-fit ​​engagement with the barb 52 to prevent the annular contact terminal 2 from falling out.

[0030] Preferably, the number of insertion slots 51 is 8, and the number of barbs 52 is 7. Traditional wire-to-board connectors require specific alignment methods or foolproof designs to ensure correct connection. However, the terminal design of this application allows for an insertion angle of 45 degrees within a 360-degree range, providing 8 possible insertion angles, which greatly simplifies the installation process and improves the flexibility of use. Specifically, as... Figure 5 , Figure 8 As shown, the terminal insertion hole 11 is designed in a circular shape with eight slots evenly distributed at 360° intervals, each slot spaced at 45° intervals. The annular contact terminal 2 is also circular, with seven barbs 52. Due to the stamping die forming process, one barb 52 is missing, and the seven barbs 52 are spaced at 45° intervals. The barbs 52 on the annular contact terminal 2 can provide strong holding force at multiple angles, ensuring that the annular contact terminal 2 will not accidentally fall off after connection. This increases the reliability and durability of the connector. Furthermore, since the barbs 52 function at multiple angles, no additional foolproof design or locking plate is required to secure the terminal.

[0031] like Figure 2 , Figure 7 As shown, a portion of the sidewall of the annular contact terminal 2 is bent inward along the circumferential direction to form annular contact points 21. There are two annular contact points 21, which are arranged along the axial direction of the annular contact terminal 2. The annular contact terminal 2 forms an electrical connection with the pin terminal 33 through the two annular contact points 21.

[0032] In this embodiment, the structure and position of the annular contact point 21 are as follows: Figure 7 As shown, the ring-shaped contact terminal 2 adopts a ring-shaped double contact design. Compared with the traditional single-point or single-ring contact method, this design significantly increases the contact area, reduces the contact resistance, and improves the conductivity. At the same time, the double contact point structure can provide redundant contact protection under vibration or shock environment, effectively preventing instantaneous disconnection or poor contact, thereby greatly improving the stability and reliability of the electrical connection.

[0033] like Figure 4 , Figure 5 , Figure 9 , Figure 10 As shown, a first locking block 34 is provided on the top surface of the connecting chamber 31, a connecting spring 13 is formed on the top wall of the plug 1, the end of the connecting spring 13 extends outward and forms a pressing block 14, a second locking block 15 is provided on the top of the connecting spring 13 to cooperate with the first locking block 34, an anti-pressure tongue 41 is formed on the top of the double anti-pressure locking plate 4, and an anti-pressure block 42 is formed on the top of the anti-pressure tongue 41. When the double anti-pressure locking plate 4 is engaged with the plug 1, the anti-pressure tongue 41 is inserted into the bottom of the connecting spring 13, and the anti-pressure block 42 is inserted into the bottom of the pressing block 14. Preferably, as Figure 10As shown, the bottom of the double anti-pressure locking plate 4 is provided with a relief groove 43 for avoiding the annular contact terminal 2.

[0034] In this embodiment, the structure of the first latching block 34 is as follows: Figure 9 As shown; the structure of the connecting spring 13 and the second locking block 15 is as follows Figure 6 As shown. The first snap-fit ​​block 34 has slotted structures on both sides for the connecting spring 13 to pass through. Part of the end of the connecting spring 13 extends outward to form a pressing block 14. Pressing down on the pressing block 14 can drive the connecting spring 13 to move downward, thereby releasing the snap-fit ​​engagement between the first snap-fit ​​block 34 and the second snap-fit ​​block 15, so that the plug 1 can be pulled out from the pin seat 3.

[0035] The structure of the anti-pressure tongue 41 and the pressing block 14 is as follows Figure 4 , Figure 10 As shown. When the double anti-pressure locking plate 4 is inserted into the plug 1, the anti-pressure tongue 41 is inserted into the bottom of the connecting spring 13, and the anti-pressure block 42 is inserted into the bottom of the pressing block 14. At this time, neither the pressing block 14 nor the connecting spring 13 can move down, and the plug 1 and the pin seat 3 remain connected.

[0036] By incorporating a double anti-pressure locking plate 4, the locking plate can effectively resist external pressure. When the double anti-pressure locking plate 4 is engaged with the plug 1, the anti-pressure tongue 41 supports the connecting spring 13 from the bottom, and the anti-pressure block 42 supports the pressing block 14, forming a double anti-pressure support. This structure completely solves the problem of traditional locking plates easily collapsing and deforming under external force, and avoids the plug 1 from accidentally disengaging from the pin seat 3 due to locking failure, further ensuring the stability and safety of the insertion state.

[0037] Preferred, such as Figure 4 As shown, the sidewall of the second latching block 15 that contacts the first latching block 34 is beveled. Beveling the sidewall of the second latching block 15 that contacts the first latching block 34 makes the insertion process of the plug 1 and the pin socket 3 smoother, reduces the insertion force, and improves the user's operating experience.

[0038] like Figure 5 , Figure 10 As shown, a third locking block 16 is formed on each of the two opposite outer side walls of the plug 1, and a locking groove 44 is formed on each of the two opposite outer side walls of the double anti-pressure locking plate 4. The double anti-pressure locking plate 4 is engaged with the plug 1 through the third locking block 16.

[0039] In this embodiment, the third latching block 16 and the latching slot 44 are positioned as follows: Figure 5 , Figure 10As shown. The double anti-pressure locking plate 4 extends outward on both sides and has a snap-fit ​​groove 44. The third snap-fit ​​block 16 is set on the left and right sides of the plug 1. Through the snap-fit ​​groove 44 and the third snap-fit ​​block 16, the double anti-pressure locking plate 4 and the plug 1 form a detachable snap-fit ​​engagement.

[0040] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A multi-angle insertion type high-holding-force, high-reliability wire-to-board connector, characterized in that, include: The plug (1) has several circular terminal insertion holes (11) inside, and through holes (12) are provided on the side wall of the terminal insertion holes (11). The annular contact terminal (2) has a hollow cylindrical structure and is installed inside the terminal insertion hole (11); A multi-angle insertion structure is respectively provided on the terminal insertion hole (11) and the annular contact terminal (2). When the annular contact terminal (2) is inserted into the plug (1), the multi-angle insertion structure enables the annular contact terminal (2) to be fixed in the terminal insertion hole (11) from multiple angles. The pin socket (3) has a connecting chamber (31) inside. Several terminal mounting holes (32) are provided on the side wall of the connecting chamber (31). The plug (1) is inserted into the connecting chamber (31). A pin terminal (33) is installed inside the terminal mounting hole (32). One end of the pin terminal (33) passes through the through hole (12) and forms an electrical connection with the annular contact terminal (2) in the terminal insertion hole (11). A double anti-pressure locking plate (4) is snapped onto the outer wall of the plug (1); The multi-angle loading structure includes: Several insertion slots (51) are opened along the axial direction on the inner side wall of the terminal insertion hole (11) and are distributed in a circumferential array with equal spacing along the circumference of the terminal insertion hole (11). Several barbs (52) are arranged circumferentially on the outer wall of the annular contact terminal (2), and the barbs (52) are engaged in the insertion groove (51); The insertion slot (51) includes an insertion section (511) and a snap-fit ​​section (512). The insertion section (511) has a driving slope (513) at one end near the snap-fit ​​section (512). When the annular contact terminal (2) is inserted into the plug (1), the barb (52) snaps into the snap-fit ​​section (512). A portion of the sidewall of the annular contact terminal (2) bends inward along the circumferential direction to form an annular contact point (21). There are two annular contact points (21), which are arranged along the axial direction of the annular contact terminal (2). The annular contact terminal (2) is electrically connected to the pin terminal (33) through the two annular contact points (21).

2. The multi-angle insertion type high holding force and high reliability wire-to-board connector as described in claim 1, characterized in that, The number of the loading slots (51) is 8, and the number of the barbs (52) is 7.

3. The multi-angle insertion type high holding force and high reliability wire-to-board connector as described in claim 1, characterized in that, A first snap-fit ​​block (34) is provided on the top surface of the connecting chamber (31), a connecting spring (13) is formed on the top wall of the plug (1), the end of the connecting spring (13) extends outward and forms a pressing block (14), a second snap-fit ​​block (15) is provided on the top of the connecting spring (13) to cooperate with the first snap-fit ​​block (34), an anti-pressure tongue (41) is formed on the top of the double anti-pressure locking piece (4), an anti-pressure block (42) is formed on the top of the anti-pressure tongue (41), and when the double anti-pressure locking piece (4) is snapped with the plug (1), the anti-pressure tongue (41) is inserted into the bottom of the connecting spring (13), and the anti-pressure block (42) is inserted into the bottom of the pressing block (14).

4. The multi-angle insertion type high holding force and high reliability wire-to-board connector as described in claim 3, characterized in that, The bottom of the double anti-pressure locking plate (4) is provided with a clearance groove (43) for avoiding the annular contact terminal (2).

5. The multi-angle insertion type high holding force and high reliability wire-to-board connector as described in claim 3, characterized in that, The plug (1) has a third locking block (16) formed on its two opposite outer side walls, and the double anti-pressure locking plate (4) has a locking groove (44) formed on its two opposite outer side walls. The double anti-pressure locking plate (4) is engaged with the plug (1) through the third locking block (16).

6. The multi-angle insertion type high holding force and high reliability wire-to-board connector as described in claim 3, characterized in that, The sidewall of the second snap-fit ​​block (15) that contacts the first snap-fit ​​block (34) is beveled.

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