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CN-122026178-A - Connector with secondary locking structure

CN122026178ACN 122026178 ACN122026178 ACN 122026178ACN-122026178-A

Abstract

The invention provides a connector with a secondary locking structure, which comprises a socket sheath assembly and a mating end, wherein a large terminal and at least two small terminals are arranged on the socket sheath assembly and are connected with each other to form an interlocking loop, the contact positions of the large terminal and the small terminal and the mating end are respectively arranged front and back along the insertion direction, a preassembling structure for locating the large terminal and the large-specification contact pin of the mating end in preassembling and mating is arranged between the socket sheath assembly and the mating end, so that the large terminal is meshed with the large-specification contact pin of the mating end, a power circuit is connected, the small terminal and the small-specification contact pin of the mating end are separated, the interlocking loop is disconnected, and a final matching structure for locating the large terminal and the small-specification contact pin in final mating and interlocking loop is arranged between the socket sheath assembly and the mating end. According to the invention, through the staggered arrangement of the matching contact positions of the large and small terminals and the matching mechanical positioning of preassembly and final matching, the on-off sequence control of the interlocking loop on the power supply loop is forcedly realized, the arc risk generated by hot plug is effectively avoided, and the safety and reliability of the connector in a 48V high-voltage environment are obviously improved.

Inventors

  • SUN GUANYONG
  • BAI HAIMING
  • LI QIANG
  • DU XIAORUI
  • GUO RUI

Assignees

  • 河南天海电器有限公司

Dates

Publication Date
20260512
Application Date
20260331

Claims (10)

  1. 1. A connector with a secondary locking structure is characterized by comprising a socket sheath assembly (1) and a mating end (2) which are spliced, wherein a large terminal (3) and at least two small terminals (4) are arranged on the socket sheath assembly (1), the small terminals (4) are interconnected through short wires to form an interlocking loop, the contact position of the large terminal (3) and the mating end (2) and the contact position of the small terminal (4) and the mating end (2) are staggered back and forth along the inserting direction, a preassembly fit structure for positioning the large terminal (3) and the large-specification pins (2-3) of the mating end (2) in a preassembly mode is arranged between the socket sheath assembly (1) and the mating end (2), a power circuit is connected, the small terminals (4) and the small-specification pins (2-4) of the mating end (2) are separated, the interlocking loop is disconnected, and a final mating structure for positioning the large terminal (3) and the small terminals (4) and the mating end (2) is arranged between the socket sheath assembly (1) and the mating end (2) so that the small terminals (4) and the small-specification pins (2) are meshed.
  2. 2. The connector with the secondary locking structure according to claim 1, wherein the pre-assembly structure comprises a secondary lock (1-1-4) arranged on the socket jacket assembly (1) and a first hanging table (2-1) and a second hanging table (2-2) arranged on the opposite end (2), wherein the first hanging table (2-1) and the second hanging table (2-2) are arranged at intervals back and forth along the insertion direction of the opposite end (2), and at least one part of the secondary lock (1-1-4) is limited between the first hanging table (2-1) and the second hanging table (2-2) when the pre-assembly is carried out.
  3. 3. Connector with secondary locking structure according to claim 2, characterized in that the end of the secondary lock (1-1-4) near the mating end (2) is provided with an inwardly protruding square hanging table (1-1-41), the square hanging table (1-1-41) being intended to be limited between the first hanging table (2-1) and the second hanging table (2-2) during pre-assembly mating, and that the end of the secondary lock (1-1-4) remote from the mating end (2) is provided with an outwardly protruding boss (1-1-43) for pressing the secondary lock (1-1-4) for deforming and unlocking the secondary lock (1-1-4).
  4. 4. A connector with a secondary locking structure according to claim 2 or 3, characterized in that the final mating structure comprises a main lock (1-1-8) arranged on the socket sheath assembly (1) and a mating end boss (2-5) arranged on the mating end (2), wherein one end of the main lock (1-1-8) close to the mating end (2) is provided with a cross beam (1-1-81), the other end of the main lock is provided with a pressing protrusion (1-1-82), and the cross beam (1-1-81) is in hanging fit with the mating end boss (2-5).
  5. 5. The connector with the secondary locking structure according to claim 4, wherein the socket sheath assembly (1) comprises a socket sheath (1-1) and a sheath skirt (1-1-5) sleeved outside the socket sheath (1-1), the auxiliary lock (1-1-4) is arranged on the sheath skirt (1-1-5), connecting ribs (1-1-42) are arranged between two sides of the middle of the auxiliary lock (1-1-4) and the sheath skirt (1-1-5) so that the auxiliary lock (1-1-4) has a deformation margin, the main lock (1-1-8) is arranged between the socket sheath (1-1) and the sheath skirt (1-1-5), and the pressing protrusions (1-1-82) extend out of the sheath skirt (1-1-5).
  6. 6. The connector with the secondary locking structure according to claim 5, further comprising a CPA (1-4) which is in plug-in fit with the main lock (1-1-8), wherein an insertion end of the CPA (1-4) is provided with a stopper hook which is fitted with a side of the cross beam (1-1-81) away from the counter-end boss (2-5), a pressing boss is provided at a rear end of the CPA (1-4) for deformation unlocking of the CPA (1-4), and the CPA (1-4) restricts the cross beam (1-1-81) from being separated from the counter-end boss (2-5) when the CPA (1-4) is in a final position.
  7. 7. The connector with the secondary locking structure according to claim 5 or 6, wherein the socket jacket assembly (1) is in plug-in fit with the TPA (1-2), a transverse opening is formed in the middle of one side of the jacket skirt (1-1-5), TPA slots (1-1-3) which are in cross communication with the small terminal holes (1-1-2) are formed in corresponding positions of the socket jacket (1-1), and the TPA (1-2) is transversely inserted into two sides of the small terminal holes (1-1-2) after passing through the opening of the jacket skirt (1-1-5) and the TPA slots (1-1-3).
  8. 8. The connector with the secondary locking structure according to claim 7, wherein two sides of the TPA (1-2) are provided with cantilevers (1-2-2), front inner sides of the cantilevers (1-2-2) are provided with trapezoid bosses (1-2-3), two sides of the small terminal holes (1-1-2) are provided with hanging cantilevers, outer sides of the hanging cantilevers are provided with preassembly bosses (1-1-10) and final position bosses (1-1-11) which are arranged front and back, the trapezoid bosses (1-2-3) are clamped between the preassembly bosses (1-1-10) and the final position bosses (1-1-11) or clamped behind the final position bosses (1-1-11) respectively to form preassembly positions and final positions, rectangular blocks (1-2-4) are arranged on the TPA (1-2), and when the TPA (1-2) is in the final position, the rectangular blocks (1-2-4) are clamped behind the small terminal (4) to form secondary locks.
  9. 9. The connector with the secondary locking structure according to claim 5, 6 or 8, wherein secondary lock guardrails (1-1-6) are arranged on two sides of the secondary lock (1-1-4) on the sheath skirt (1-1-5), the secondary lock guardrails (1-1-6) protrude out of the outer surface of the secondary lock (1-1-4) and are used for protecting the secondary lock (1-1-4) from being broken by collision, and supporting ribs (1-1-7) are arranged on the inner side of the bottom of the secondary lock (1-1-4) on the socket sheath (1-1) and are used for limiting the maximum deformation angle when the secondary lock (1-1-4) is pressed.
  10. 10. Connector with secondary locking structure according to claim 5 or 6 or 8, characterized in that the sheath skirt (1-1-5) is provided with protruding primary lock guard rails (1-1-9) on the outside of the primary lock (1-1-8), which primary lock guard rails (1-1-9) protrude from the outer surface of the primary lock (1-1-8) for protecting the primary lock (1-1-8).

Description

Connector with secondary locking structure Technical Field The present invention relates to the field of connectors, and more particularly, to a connector with a secondary locking structure. Background With the continuous penetration of the intellectualization and electrification of automobiles, the popularization of vehicle-mounted entertainment systems, intelligent driving and various electric control modules has put forward higher requirements on the power supply of automobiles. Conventional 12V electrical architectures have been difficult to meet the ever increasing power demands, and 48V electrical architectures have evolved and become an industry trend. The safety risk faced by the connector is significantly higher than that of a conventional 12V system in a 48V voltage environment. In a 12V circuit, the arc generated during disconnection is weak and can be extinguished rapidly, while at 48V voltage, the arc energy is higher and the duration time is longer, and if the arc is improperly controlled, serious ablation and even safety accidents are easily caused to the terminal and the connector body. Therefore, how to ensure the on-off of the power circuit in the no-load state during the connector assembling and disassembling process becomes a key safety requirement in the 48V connector design. In the prior art, the reliability of mating is improved by arranging a secondary locking structure such as CPA (compact form factor) on part of the connector, so that the connector is prevented from accidentally falling off under working conditions such as vibration. However, the locking structure of the connector is mainly used for guaranteeing the mechanical connection strength, and the safety of the connector is still insufficient under the 48V high-voltage application scene. Publication No. 2024.11.01, CN118889122a, discloses a connector assembly comprising a connector and a counterpart connector, the connector comprising a connector housing, at least one terminal configured to be inserted into a cavity formed in the connector housing, and a connector position assurance member slidably mounted to the connector housing between an initial position, an intermediate position and a final position, the movement of the connector position assurance member between the intermediate position and the final position being released by the mating of the connector and the counterpart connector. The connector position assurance member integrates a terminal position assurance element configured to move with the connector position assurance member at least between a release position in which the terminal position assurance element allows the at least one terminal to be fully inserted in its respective cavity and a locking position in which the terminal position assurance element locks the at least one terminal fully inserted in its respective cavity. However, the CPA member in this solution is mainly used to ensure that the connectors are mated in place and lock the terminals, and it is difficult to solve the problem of arc risk caused by hot plugging in a 48V high-voltage environment. Disclosure of Invention The invention provides a connector with a secondary locking structure, which is used for solving the problem that the connector with the secondary locking structure in the prior art is difficult to solve the safety problem in a 48V high-voltage environment. In order to achieve the above purpose, the technical scheme of the invention is realized as follows: A connector with a secondary locking structure comprises a socket sheath assembly and a mating end which are spliced, wherein the socket sheath assembly is provided with a large terminal and at least two small terminals, the small terminals are connected through short wires to form an interlocking loop, the contact positions of the large terminal and the mating end and the small terminal and the mating end are staggered front and back along the insertion direction, a preassembly structure for locating the large terminal and the small terminal in preassembly and mating is arranged between the socket sheath assembly and the mating end, so that the large terminal is meshed with a large-specification contact pin of the mating end, a power circuit is connected, the small terminal and a small-specification contact pin of the mating end are separated, the interlocking loop is disconnected, and a final cooperation structure for locating the small terminal and the small-specification contact pin in final mating is arranged between the socket sheath assembly and the mating end, so that the small terminal is meshed with the small-specification contact pin and the interlocking loop is connected. Further, the pre-assembly structure comprises an auxiliary lock arranged on the socket sheath assembly, and a first hanging table and a second hanging table which are arranged on the opposite end, wherein the first hanging table and the second hanging table are arranged at intervals in the fro