High-vibration-resistance connector with secondary lock structure

Abstract

The invention discloses a high vibration resistance connector with a secondary lock structure. According to the technical scheme, the connector comprises a male end module and a female end module, a primary lock structure and a secondary lock structure are arranged between a female terminal and a female end plastic shell, and the primary lock structure comprises a locking hole formed in the bottom of the female terminal and a primary lock elastic piece arranged in a terminal hole of the female end plastic shell; the primary locking elastic piece comprises a limiting protrusion capable of extending into the locking hole. The secondary lock structure comprises a secondary lock hole transversely formed in the middle of the female end plastic shell and a strip-shaped buckle which is inserted into the secondary lock hole and can be clamped with the female end plastic shell, and the strip-shaped buckle abuts against all the female terminals in the female end plastic shell and limits and fixes all the female terminals; the female terminal is also provided with a double-elastic-sheet contact pressing structure. According to the scheme, disassembly and assembly are convenient, connection is firm, and vibration resistance is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and in particular to a connector with a secondary lock structure. Background Art

[0002] In existing piercing terminal connectors, the female terminal and the female housing are typically secured using multiple locking mechanisms, such as the triple-lock mechanism produced by TE. This structure is complex and difficult to disassemble, resulting in the female housing becoming unusable after removal. Furthermore, the female terminal suffers from insufficient vibration resistance, leaving room for improvement. Therefore, the present inventors aim to provide a connector that is easy to assemble and disassemble, offers a secure connection, and exhibits high vibration resistance. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the main purpose of the present invention is to provide a connector that is easy to assemble and disassemble, has a firm connection and is highly vibration-resistant.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-vibration-resistant connector with a secondary lock structure, comprising a male end module and a female end module, the male end module comprising a male end plastic shell and a plurality of male terminals fixedly arranged in the male end plastic shell, the female end module comprising a female end plastic shell and a plurality of female terminals fixedly arranged in the female end plastic shell, the plurality of female terminals being crimped and connected with an FPC, a press-lock buckle being provided on the female end plastic shell, a lock groove cooperating with the press-lock buckle being provided on the male end plastic shell, a primary lock structure and a secondary lock structure being provided between the female terminal and the female end plastic shell, the primary lock structure comprising a locking hole provided at the bottom of the female terminal and a locking hole provided in the terminal hole of the female end plastic shell The secondary lock spring piece includes a limiting protrusion that can extend into the locking hole; the secondary lock structure includes a secondary lock hole horizontally arranged in the middle of the female end plastic shell and a strip buckle inserted into the secondary lock hole and capable of being clamped with the female end plastic shell, the strip buckle abuts against all female terminals in the female end plastic shell and limits and fixes all female terminals; a double spring piece contact and pressure structure is also provided on the female terminal, the double spring piece contact and pressure structure includes a female end main spring piece and a female end auxiliary spring piece arranged above the female end main spring piece, the bent surface of the female end main spring piece abuts against the male terminal, the end of the female end auxiliary spring piece is inclined toward the female end main spring piece, and when the female end main spring piece is forced to be lifted up, it abuts against the end of the female end auxiliary spring piece.

[0005] Preferably, a buckle secondary lock with a protruding structure is provided at the tail of the strip buckle, and a limiting end is provided at the tail of the secondary lock hole on the female end plastic shell to be engaged with the buckle secondary lock.

[0006] Preferably, the head of the strip buckle is provided with a buckle main lock, and the head of the secondary lock hole is provided on the female end plastic shell with a limiting hole for the buckle main lock to be inserted.

[0007] Preferably, the strip buckle is provided with an avoidance groove for avoiding pressing the locking buckle.

[0008] Preferably, the tail of the female terminal is provided with a plurality of crimping wings connected to the FPC.

[0009] Preferably, a plurality of plastic shell reference surfaces flush with the male terminal head surface are provided in the male terminal plastic shell.

[0010] Preferably, a grid for isolating adjacent male terminals is provided at the bottom of the male terminal plastic housing.

[0011] Preferably, a plurality of rectangular flatness measuring surfaces are provided on the bottom of the male end plastic shell.

[0012] Preferably, a convex bump is provided on the side of the male terminal in contact with the terminal hole, two stepped barbs are provided on the male terminal for inserting into the terminal hole, and a dovetail riveting surface is provided at the tail of the male terminal.

[0013] Preferably, the female end plastic shell is provided with a plurality of connection protrusions that interfere with the male end plastic shell.

[0014] Compared with the prior art, the present invention has the following advantages: the female terminal in this solution is fixed by a primary lock structure and a secondary lock structure, wherein the primary lock structure and the secondary lock structure are easy to disassemble, so that the female terminal plastic shell can be reused. Compared with the structure in the prior art that the female terminal plastic shell needs to be discarded and cannot be reused, it is more environmentally friendly and reduces costs.

[0015] The female terminal ensures the structural stability through the primary lock structure and the secondary lock structure, and at the same time provides a basis for its high vibration resistance. The double-spring-touch-pressure structure includes a female main spring and a female auxiliary spring arranged above the female main spring. The bent surface of the female main spring abuts the male terminal, and the end of the female auxiliary spring is inclined toward the female main spring. When the female main spring is lifted by the male terminal, it abuts against the end of the female auxiliary spring. The female auxiliary spring provides additional downward pressure for the female main spring, ensuring the reliability of the connection with the male terminal. The bent surface of the female main spring is the force point, which is a rolled surface with low roughness, further ensuring the reliability of the electrical connection under higher vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a high vibration-resistant connector with a secondary lock structure according to the present invention; Figure 2 This is a front view of a high vibration-resistant connector with a secondary lock structure according to the present invention; Figure 3 for Figure 2 Cross-sectional view of the AA section; Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the middle part A; Figure 5 It is a structural schematic diagram of the female terminal of the present invention; Figure 6 This is a schematic diagram of the structure of the female end module of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the structure of the female end module of the present invention. Figure 2 ; Figure 8 It is a front view of the female end module of the present invention; Figure 9 for Figure 8 Cross-sectional view of the AA section; Figure 10 for Figure 9 A schematic diagram of the enlarged structure of the middle part A; Figure 11 for Figure 8 Cross-section of the middle BB section; Figure 12 for Figure 11 A schematic diagram of the enlarged structure of the middle part A; Figure 13 Schematic diagram of the structure of the strip buckle of the present invention; Figure 14 This is a schematic diagram of the structure of the male terminal module of the present invention. Figure 1 ; Figure 15 This is a schematic diagram of the structure of the male terminal module of the present invention. Figure 2 (PCB board omitted); Figure 16 Schematic diagram of the structure of the male terminal of the present invention.

[0017] In the figure: 1. Male end module; 11. Male end plastic shell; 111. Plastic shell reference surface; 112. Grid; 113. Rectangular flatness measuring surface; 12. Male terminal; 121. Bump; 122. Stepped barb; 123. Dovetail riveting surface; 13. Locking groove; 2. Female end module; 21. Female end plastic shell; 22. Female terminal; 23. FPC; 24. Press-lock buckle; 25. Locking hole; 26. Primary locking spring; 27. Limiting protrusion; 28. Secondary locking hole; 29. ​​Strip buckle; 210. Female end main spring; 211. Female end auxiliary spring; 212. Buckle auxiliary lock; 213. Limiting terminal; 214. Buckle main lock; 215. Limiting hole; 216. Avoidance groove; 217. Crimp wing; 218. Connecting protrusion. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figure 1As shown, a high vibration-resistant connector with a secondary lock structure includes a male module 1 and a female module 2, the male module 1 includes a male plastic shell 11 and a plurality of male terminals 12 fixedly arranged in the male plastic shell 11, the female module 2 includes a female plastic shell 21 and a plurality of female terminals 22 fixedly arranged in the female plastic shell 21, the plurality of female terminals 22 are crimped and connected with an FPC 23, the female plastic shell 21 is provided with a press-lock buckle 24, the male plastic shell 11 is provided with a lock groove 13 that cooperates with the press-lock buckle 24, a primary lock structure and a secondary lock structure are provided between the female terminal 22 and the female plastic shell 21, the primary lock structure includes a locking hole 25 provided at the bottom of the female terminal 22 and a primary lock shrapnel 26 provided in the terminal hole of the female plastic shell 21, the primary lock shrapnel 26 includes a locking hole 25 provided at the bottom of the female terminal 22 and a primary lock shrapnel 26 provided in the terminal hole of the female plastic shell 21 The female terminal 22 is fixed with the female terminal 22 in the locking hole 25, and the female terminal 22 is fixed with the female terminal 22 in the locking hole 25.

[0020] The present invention provides a high-vibration-resistant connector with a secondary locking structure. The single locking structure formed by the press-locking buckle 24 and the locking groove 13 facilitates plugging and unplugging while ensuring reliability. During installation, when the female plastic shell 21 is inserted into the male plastic shell 11, the press-locking buckle 24 is pressed down to make the press-locking buckle 24 enter the locking groove 13 to achieve locking. During disassembly, the male module 1 and the female module 2 can be separated by simply pressing the press-locking buckle 24 again to facilitate the press-locking buckle 24 to be disengaged from the locking groove 13.

[0021] In this solution, a primary lock structure and a secondary lock structure are provided between the female terminal 22 and the female terminal plastic shell 21. The primary lock structure is to initially fix the female terminal 22 by cooperating with the locking hole 25 in the female terminal 22 through the primary lock spring 26. When disassembling, the female terminal 22 can be removed from the terminal hole by inserting a jig commonly used in the industry into the terminal hole and pressing down the primary lock spring 26. All female terminals 22 are firmly fixed in place by the secondary lock structure. Specifically, the secondary lock hole 28 in the middle of the female terminal plastic shell 21 and the bar buckle 29 inserted into the secondary lock hole 28 and capable of being snapped with the female terminal plastic shell 21, the bar buckle 29 is fixed in contact with the female terminal 22, and the bar buckle 29 and the female terminal plastic shell 21 are fixed by a snap-fit ​​structure, which is also relatively easy to disassemble. The female terminal 22 in this solution is fixed by a primary lock structure and a secondary lock structure, wherein the primary lock structure and the secondary lock structure are easy to disassemble, so that the female terminal plastic shell 21 can be reused. Compared with the structure in the prior art that the female terminal plastic shell 21 needs to be discarded and cannot be reused, it is more environmentally friendly and reduces costs.

[0022] The female terminal 22 ensures the structural stability through the primary lock structure and the secondary lock structure, and provides a basis for its high vibration resistance. The double-spring contact and pressure structure includes a female main spring 210 and a female auxiliary spring 211 arranged above the female main spring 210. The bent surface of the female main spring 210 abuts against the male terminal 12, and the end of the female auxiliary spring 211 is inclined toward the female main spring 210. When the female main spring 210 is lifted by the male terminal 12, it abuts against the end of the female auxiliary spring 211. The female auxiliary spring 211 provides additional downward pressure for the female main spring 210, ensuring the reliability of the connection with the male terminal 12. The bent surface of the female main spring 210 is the force point, which is a rolled surface with low roughness, further ensuring the reliability of the electrical connection under higher vibration.

[0023] Preferably, a buckle secondary lock 212 with a protruding structure is provided at the tail of the strip buckle 29 , and a limiting end 213 engaged with the buckle secondary lock 212 is provided at the tail of the secondary lock hole 28 on the female end plastic shell 21 .

[0024] Preferably, a main buckle lock 214 is provided at the head of the strip buckle 29 , and a limiting hole 215 for inserting the main buckle lock 214 is provided at the head of the secondary lock hole 28 on the female end plastic shell 21 .

[0025] Refer to the attached Figures 5 to 9, a limiting structure is adopted between both ends of the bar buckle 29 and the female end plastic shell 21, and the buckle secondary lock 212 is connected with the limiting end head 213 through the buckle secondary lock. When disassembling, use a disassembly jig to press the two buckle main locks 214, and then push the tail of the bar buckle 29 inward, and the buckle secondary lock 212 and the buckle main lock 214 can be disengaged from the limiting end head 213 and the limiting hole 215, and the bar buckle 29 can be pulled out from the secondary lock hole 28. It is easy to disassemble and can be reused.

[0026] Preferably, the strip buckle 29 is provided with an avoidance groove 216 for avoiding the pressing and locking buckle 24 .

[0027] Preferably, the tail of the female terminal 22 is provided with a plurality of crimping wings 217 connected to the FPC 23 .

[0028] The crimping connection between the crimping wings 217 and the FPC 23 fully ensures the connection stability between the female terminal 22 and the FPC 23.

[0029] Preferably, the male end plastic shell 11 is provided with a plurality of plastic shell reference surfaces 111 that are flush with the head surface of the male terminal 12. The plastic shell reference surfaces 111 provide a reference line for the CCD of the automatic machine to accurately measure the position data of the head of the male terminal 12.

[0030] Preferably, a grid 112 for isolating adjacent male terminals 12 is provided at the bottom of the male terminal housing 11. The grid 112 is used to isolate adjacent male terminals 12 and increase the creepage distance.

[0031] Preferably, a plurality of rectangular flatness measurement surfaces 113 are provided at the bottom of the male end plastic shell 11. The rectangular flatness measurement surfaces 113 are used to accurately measure the deformation of the bottom plane of the male end plastic shell 11.

[0032] Preferably, the side of the male terminal 12 that contacts the terminal hole is provided with a convex bump 121, the male terminal 12 is provided with two stepped barbs 122 that are inserted into the terminal hole, and the tail of the male terminal 12 is provided with a dovetail-shaped riveting surface 123. The convex bump 121 is used to limit assembly and increase holding force, the stepped barbs 122 also increase terminal holding force, and the dovetail-shaped riveting surface 123 increases the riveting force area, thereby improving riveting reliability.

[0033] Preferably, the female end molded shell 21 is provided with a plurality of connecting protrusions 218 that interfere with the male end molded shell 11. The connecting protrusions 218 cause slight interference between the male end molded shell 11 and the female end molded shell 21 to offset the assembly gap and improve vibration resistance.

[0034] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A high vibration-resistant connector with a secondary lock structure, comprising a male end module and a female end module, wherein the male end module comprises a male end plastic shell and a plurality of male terminals fixedly arranged in the male end plastic shell, the female end module comprises a female end plastic shell and a plurality of female terminals fixedly arranged in the female end plastic shell, the plurality of female terminals are crimped and connected with an FPC, a push-lock buckle is arranged on the female end plastic shell, and a lock groove cooperating with the push-lock buckle is arranged on the male end plastic shell, characterized in that: A primary lock structure and a secondary lock structure are arranged between the female terminal and the female end plastic shell, the primary lock structure comprises a locking hole arranged at the bottom of the female terminal and a primary lock spring arranged in the terminal hole of the female end plastic shell, the primary lock spring comprises a limiting protrusion that can extend into the locking hole; the secondary lock structure comprises a secondary lock hole arranged horizontally in the middle of the female end plastic shell and a strip buckle inserted into the secondary lock hole and capable of being clamped with the female end plastic shell, the strip buckle abuts against all female terminals in the female end plastic shell and limits and fixes all female terminals; a double spring sheet touch-pressing structure is also arranged on the female terminal, the double spring sheet touch-pressing structure comprises a female end main spring sheet and a female end auxiliary spring sheet arranged above the female end main spring sheet, the bent surface of the female end main spring sheet abuts against the male terminal, the end of the female end auxiliary spring sheet is inclined toward the female end main spring sheet, and the female end main spring sheet abuts against the end of the female end auxiliary spring sheet when the female end main spring sheet is lifted up by force.

2. A highly vibration-resistant connector with a secondary lock structure according to claim 1, characterized in that: A buckle secondary lock with a protruding structure is arranged at the tail of the strip buckle, and a limiting end head which is engaged with the buckle secondary lock is arranged at the tail of the secondary lock hole on the female end plastic shell.

3. A highly vibration-resistant connector with a secondary lock structure according to claim 1 or 2, characterized in that: The head of the strip buckle is provided with a buckle main lock, and the head of the secondary lock hole on the female end plastic shell is provided with a limiting hole for the buckle main lock to be inserted.

4. The high vibration-resistant connector with a secondary lock structure according to claim 1, characterized in that: The strip buckle is provided with an avoidance groove for avoiding the pressing and locking buckle.

5. The high vibration-resistant connector with a secondary lock structure according to claim 1, characterized in that: The tail of the female terminal is provided with a plurality of crimping wings connected with the FPC.

6. The high vibration-resistant connector with a secondary lock structure according to claim 1, characterized in that: The male terminal plastic shell is provided with a plurality of plastic shell reference surfaces which are arranged flush with the male terminal head surface.

7. The high vibration-resistant connector with a secondary lock structure according to claim 1, characterized in that: A grid for isolating adjacent male terminals is provided at the bottom of the male terminal plastic shell.

8. The high vibration-resistant connector with a secondary lock structure according to claim 1, characterized in that: A plurality of rectangular flatness measuring surfaces are arranged at the bottom of the male end plastic shell.

9. The high vibration-resistant connector with a secondary lock structure according to claim 1, characterized in that: A convex bump is arranged on the side of the male terminal in contact with the terminal hole, two stepped barbs are arranged on the male terminal to be inserted into the terminal hole, and a dovetail riveting surface is arranged at the tail of the male terminal.

10. The high vibration-resistant connector with a secondary lock structure according to claim 1, characterized in that: The female end plastic shell is provided with a plurality of connection protrusions which interfere with the male end plastic shell.

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