Connector with double-locking structure

Abstract

The utility model provides a connector with a double-locking structure, and solves the technical problem that in the prior art, an independent TPA needs to be designed to ensure reliable connection of the connector. The connector with the double-locking structure comprises a terminal shell and a terminal which are matched in an inserted mode, the terminal shell is provided with a primary locking groove and a secondary spring bolt, the terminal is provided with an elastic piece and a locking face, the elastic piece is matched with the primary locking groove in a clamped mode, and the secondary spring bolt is matched with the locking face in a clamped mode. Through cooperation of the primary lock groove and the secondary lock tongue, firm and reliable plugging cooperation of the connector is ensured. The double-locking structure can effectively prevent the connector from accidentally falling off or loosening in the using process, and the safety of the connector is improved. The connector can be effectively prevented from being loosened or disconnected under the condition of vibration or stress, and the connection stability is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of locking structures, in particular to a connector with a double locking structure. Background Art

[0002] At present, with the advent of electrification, intelligence, networking and sharing of vehicles, connectors are becoming more and more integrated and miniaturized, but their reliability and safety requirements are becoming higher and higher.

[0003] In order to improve the reliability and safety of connectors, a Chinese utility model patent with an authorization announcement date of 2020-5-6 and an authorization announcement number of CN209313062U has appeared, which discloses a locking member, a connector end cover and a connector for locking a mating connector, and relates to a locking member, a connector end cover, a connector end cover assembly and a connector for locking a mating connector. The locking member includes a base, a top and a first protrusion; the base has a first end and a second end along the locking direction, and the base also has an upper surface and a lower surface relative to each other; a locking spring for resisting against a connector housing; the top extends upward from the upper surface of the base and protrudes from the base; the first protrusion extends from the upper surface of the base and protrudes upward from the base; a second protrusion is fixedly connected to the first protrusion, and the second protrusion protrudes laterally from the first protrusion, and the first protrusion, the second protrusion and the base together form a groove extending along the locking direction. Since the second end of the locking member is prevented from tilting up, there is no need to provide an additional structure in the connector housing to prevent the locking member from tilting up, thereby simplifying the structure of the connector housing and enabling it to meet the requirement of small size.

[0004] However, the above-mentioned connector with double-clamp terminals has only one locking structure. In order to ensure reliable connection of the connector, it is often necessary to design a separate TPA, which increases the installation process of the TPA and the sheath, which not only reduces the assemblability but also increases the production cost. Utility Model Content

[0005] The utility model provides a connector with a double locking structure, which solves the technical problem in the prior art that a separate TPA needs to be designed to ensure reliable connection of the connector.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A connector with a double locking structure comprises a plug-in terminal housing and a terminal, wherein the terminal housing is provided with a primary locking groove and a secondary locking tongue, and the terminal is provided with a spring sheet and a locking surface, wherein the spring sheet is snap-fitted with the primary locking groove, and the secondary locking tongue is snap-fitted with the locking surface. The plug-in fit of the connector is ensured to be firm and reliable through the cooperation of the primary locking groove and the secondary locking tongue. This double locking structure can effectively prevent the connector from accidentally falling off or loosening during use, thereby improving the safety of the connector. It can effectively prevent the connector from loosening or disconnecting under vibration or force, thereby maintaining the stability of the connection.

[0008] Furthermore, the terminal is provided with an anti-error rib, and the terminal housing is provided with an anti-error groove, and the anti-error rib is plugged into and matched with the anti-error groove. By providing the anti-error rib on the terminal and providing a corresponding anti-error groove in the terminal housing, the sliding match between the anti-error rib and the anti-error groove is achieved. This design can effectively prevent incorrect insertion, that is, inserting the wrong type of terminal into the connector. The cooperation of the anti-error rib and the anti-error groove ensures that only the correct type of terminal can be inserted into the connector, thereby improving the reliability and safety of the connector.

[0009] Furthermore, the anti-mismatch rib is a raised strip, and the anti-mismatch rib is arranged on one side edge of the terminal. By designing the anti-mismatch rib as a raised strip shape and arranging it on one side edge of the terminal, it can be made more conspicuous and easy to identify. Such a design makes it easier for users to align the correct position when inserting the terminal, reducing the possibility of insertion errors. The raised shape of the anti-mismatch rib can also provide better instructions and guidance to help users insert the terminal correctly.

[0010] Furthermore, a thrust structure is provided at the opening of the terminal housing away from the terminal insertion end, and the thrust structure is engaged with the end face of the terminal. The fit design of the thrust structure and the insertion face of the terminal box can ensure that the connector obtains more stable support when the terminal is inserted. This tight fit can reduce the shaking and loosening of the connector during use, thereby providing more reliable connection performance.

[0011] Furthermore, two secondary locking tongues are provided, and the two secondary locking tongues are symmetrically arranged inside the terminal housing. By arranging two symmetrical secondary locking tongues in the connector, more locking points and supporting areas can be provided. In this way, the contact area between the connector and the terminal can be increased, providing a more secure connection, thereby enhancing the stability of the connection. The two symmetrical secondary locking tongues can evenly distribute the connection force, effectively reducing the loosening and disconnection of the connector under stress.

[0012] Furthermore, the secondary locking tongue comprises a cantilever connected to the inner wall of the terminal housing cavity, a hook is provided at one end of the cantilever away from the terminal housing, a guide slope is provided on the side of the hook close to the terminal, and an anti-touch slope is provided on the side away from the terminal.

[0013] The cantilever design makes it easier to insert and remove terminals. The presence of the hook allows the terminal to be easily inserted under the cantilever, and the guide bevel can guide the terminal to the correct insertion direction. In this way, users do not need to make additional adjustments or rotations when inserting the terminal, which simplifies the steps of the plugging and unplugging operation and improves the efficiency and accuracy of the operation.

[0014] The hook design provides a reliable locking force to ensure that the terminal is firmly fixed in the connector. When the terminal is inserted under the cantilever, the hook interacts with the terminal's locking structure to form a secure lock. This prevents the connector from loosening or falling off under vibration or force, providing reliable connection performance.

[0015] The anti-touch bevel can effectively prevent the connector from touching or colliding with other parts or objects. When the connector is inserted or removed, the anti-touch bevel will guide other parts or objects away from the connector to avoid damage or failure caused by contact. This design can improve the durability and reliability of the connector.

[0016] Furthermore, a secondary lock clearance space is provided between the anti-touch slope and the terminal housing. The secondary lock clearance space between the anti-touch slope and the terminal housing can provide sufficient distance to avoid collision and damage between the connector and other components.

[0017] Furthermore, one side of the locking surface is connected to the wire crimping portion and the insulation crimping portion in sequence. The existence of the wire crimping portion can ensure a reliable electrical connection between the wire and the connector. By inserting the wire into the wire crimping portion and then performing appropriate crimping operations, the wire can be firmly connected to the connector. This design can provide a low-resistance electrical connection and ensure the transmission quality and stability of signals or currents.

[0018] Furthermore, the two secondary locking tongues are respectively arranged on adjacent surfaces of the primary locking groove. By respectively arranging the two secondary locking tongues on both sides of the primary locking groove, the locking force and stability of the connector can be increased. When the connector is inserted into the corresponding socket, the two secondary locking tongues will interact with the locking groove of the socket respectively to form a double locking mechanism. This design can ensure that the connector is firmly locked in the socket to prevent accidental falling off or loosening.

[0019] Furthermore, the distance between the primary lock groove and the thrust structure is smaller than the distance between the secondary lock tongue and the thrust structure. Since the distance between the primary lock groove and the thrust structure is smaller, when the connector is inserted into the socket, the thrust structure of the primary lock groove can contact the thrust structure of the socket earlier. This ensures that the connector is first connected to the primary locking mechanism of the socket during the insertion process, providing initial stability and reliability.

[0020] Beneficial effects of the utility model:

[0021] Through the cooperation of the primary lock groove and the secondary lock tongue, the plug-in cooperation of the connector becomes firm and reliable, effectively preventing the connector from accidentally falling off or loosening during use, and improving the safety of the connector. In addition, the design of the anti-mistake rib and anti-mistake groove can prevent incorrect insertion and increase the reliability and safety of the connector. The thrust structure of the terminal housing and the symmetrical setting of the secondary lock tongue provide more stable support and a stronger connection, enhancing the stability of the connector. The design of the cantilever, hook and guide bevel makes it easier to insert and remove the terminal, and the setting of the anti-touch bevel can prevent the connector from touching and colliding with other parts or objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of a connector with a double locking structure;

[0024] Figure 2 A cross-sectional view of a connector with a double locking structure;

[0025] Figure 3 A cross-sectional view of a connector with a double locking structure from another angle;

[0026] Figure 4 A schematic diagram of the terminal structure of a connector with a double locking structure;

[0027] Figure 5 A cross-sectional view of a terminal housing of a connector with a double locking structure;

[0028] Figure 6 A cross-sectional view of a terminal housing of a connector with a double locking structure from another angle.

[0029] in:

[0030] 1. Terminal housing;

[0031] 2. One-time locking slot;

[0032] 3. Secondary lock tongue, 31. Hook, 32. Cantilever, 33. Guide slope, 34. Anti-touch slope, 35. Secondary lock clearance space;

[0033] 4. Thrust structure;

[0034] 5. Anti-misalignment slot;

[0035] 6. Terminal, 61. Spring piece, 62. Terminal box, 63. Anti-misalignment rib, 64. Wire crimping part, 65. Insulation crimping part, 66. Locking surface. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0037] Embodiment 1, a connector with a double locking structure, such as Figure 1 , Figure 4 and Figure 5 As shown, a connector with a double locking structure includes a plug-in terminal housing 1 and a terminal 6, wherein the terminal housing 1 is provided with a primary locking groove 2 and a secondary locking tongue 3, and the terminal 6 is provided with a spring piece 61 and a locking surface 66, wherein the spring piece 61 is snap-fitted with the primary locking groove 2, and the secondary locking tongue 3 is snap-fitted with the locking surface 66. Through the cooperation of the primary locking groove 2 and the secondary locking tongue 3, the plug-in cooperation of the connector is ensured to be firm and reliable. This double locking structure can effectively prevent the connector from accidentally falling off or loosening during use, thereby improving the safety of the connector. It can effectively prevent the connector from loosening or disconnecting under vibration or force, and maintain the stability of the connection.

[0038] Example 2, as a preferred implementation of a connector with a double locking structure, such as Figure 4 As shown, the difference from Example 1 is that the terminal 6 is provided with an anti-error rib 63, and the terminal housing 1 is provided with an anti-error groove 5, and the anti-error rib 63 is plugged and matched with the anti-error groove 5. By providing the anti-error rib 63 on the terminal 6 and providing the corresponding anti-error groove 5 in the terminal housing 1, the sliding fit between the anti-error rib 63 and the anti-error groove 5 is achieved. This design can effectively prevent incorrect insertion, that is, inserting the wrong type of terminal 6 into the connector. The cooperation between the anti-error rib 63 and the anti-error groove 5 ensures that only the correct type of terminal 6 can be inserted into the connector, thereby improving the reliability and safety of the connector.

[0039] Example 3, as a preferred implementation of a connector with a double locking structure, Figure 4As shown, the difference from Example 2 is that the anti-mistake rib 63 is a raised strip, and the anti-mistake rib 63 is arranged on one side edge of the terminal 6. By designing the anti-mistake rib 63 as a raised strip shape and arranging it on one side edge of the terminal 6, it can be made more conspicuous and easy to identify. Such a design makes it easier for the user to align the correct position when inserting the terminal 6, reducing the possibility of insertion errors. The raised shape of the anti-mistake rib 63 can also provide better instructions and guidance to help the user insert the terminal 6 correctly.

[0040] Example 4, as a preferred implementation of a connector with a double locking structure, Figure 4 As shown, the difference from Example 1 is that a thrust structure 4 is provided at the opening of the terminal housing 1 away from the insertion end of the terminal 6, and the thrust structure 4 is matched with the end face of the terminal 6. The fitting design of the thrust structure 4 and the insertion face of the terminal box 62 can ensure that the connector obtains more stable support when the terminal 6 is inserted. This tight fit can reduce the shaking and loosening of the connector during use, thereby providing more reliable connection performance.

[0041] Example 5, as a preferred implementation of a connector with a double locking structure, Figure 5 As shown, the difference from Example 4 is that two secondary lock tongues 3 are provided, and the two secondary lock tongues 3 are symmetrically arranged inside the terminal housing 1. By arranging two symmetrical secondary lock tongues 3 in the connector, more locking points and support areas can be provided. In this way, the contact area between the connector and the terminal 6 can be increased, providing a more secure connection, thereby enhancing the stability of the connection. The two symmetrical secondary lock tongues 3 can evenly distribute the connection force, effectively reducing the loosening and disconnection of the connector under stress.

[0042] Example 6, as a preferred implementation of a connector with a double locking structure, Figure 1 , Figure 6 As shown, the difference from Example 5 is that the secondary locking tongue 3 includes a cantilever 32 connected to the inner wall of the cavity of the terminal housing 1, and a hook 31 is provided at the end of the cantilever 32 away from the terminal housing 1, and a guide slope 33 is provided on the side of the hook 31 close to the terminal 6, and an anti-touch slope 34 is provided on the side away from the terminal 6.

[0043] The design of the cantilever 32 makes it easier to insert and remove the terminal 6. The presence of the hook 31 allows the terminal 6 to be easily inserted under the cantilever 32, and the guide slope 33 can guide the correct insertion direction of the terminal 6. In this way, the user does not need to make additional adjustments or rotations when inserting the terminal 6, which simplifies the steps of the plugging and unplugging operation and improves the efficiency and accuracy of the operation.

[0044] The design of the hook 31 can provide a reliable locking force to ensure that the terminal 6 is firmly fixed in the connector. When the terminal 6 is inserted under the cantilever 32, the hook 31 interacts with the locking structure of the terminal 6 to form a firm lock. This can prevent the connector from loosening or falling off under vibration or force, and provide reliable connection performance.

[0045] The anti-touch bevel 34 can effectively prevent the connector from touching or colliding with other parts or objects. When the connector is inserted or removed, the anti-touch bevel 34 will guide other parts or objects away from the connector to avoid damage or failure caused by contact. This design can improve the durability and reliability of the connector.

[0046] Example 7, as a preferred implementation of a connector with a double locking structure, Figure 6 As shown, the difference from Embodiment 6 is that a secondary lock clearance space 35 is provided between the anti-touch slope 34 and the terminal housing 1. The secondary lock clearance space 35 between the anti-touch slope 34 and the terminal housing 1 can provide sufficient distance to avoid collision and damage between the connector and other components.

[0047] Example 8, as a preferred implementation of the connector terminal hole with a double locking structure, Figure 4 As shown, the difference from Example 7 is that one side of the locking surface 66 is connected to the wire crimping portion 64 and the insulation crimping portion 65 in sequence. The existence of the wire crimping portion 64 can ensure a reliable electrical connection between the wire and the connector. By inserting the wire into the wire crimping portion 64 and then performing appropriate crimping operations, the wire can be firmly connected to the connector. This design can provide a low-resistance electrical connection and ensure the transmission quality and stability of signals or currents.

[0048] Example 9, as a preferred implementation of a connector with a double locking structure, Figure 1 , Figure 4 As shown, the difference from Example 8 is that the two secondary locking tongues 3 are respectively arranged on the adjacent surfaces of the primary locking groove 2. By arranging the two secondary locking tongues 3 on both sides of the primary locking groove 2, the locking force and stability of the connector can be increased. When the connector is inserted into the corresponding socket, the two secondary locking tongues 3 will interact with the locking groove of the socket respectively to form a double locking mechanism. This design can ensure that the connector is firmly locked in the socket to prevent accidental falling off or loosening.

[0049] Example 10, as a preferred implementation of a connector with a double locking structure, such as Figure 1 , Figure 4As shown, the difference from Example 9 is that the distance between the primary lock groove 2 and the thrust structure 4 is smaller than the distance between the secondary lock tongue 3 and the thrust structure 4. Since the distance between the primary lock groove 2 and the thrust structure 4 is smaller, when the connector is inserted into the socket, the primary lock groove 2 can contact the thrust structure 4 of the socket earlier. This ensures that the connector is first connected to the primary locking mechanism of the socket during the insertion process, providing initial stability and reliability.

[0050] Embodiment 11, as Figure 1-6 As shown, a connector with a double locking structure includes a terminal housing 1 and a terminal 6. The terminal 6 is disassembled and arranged in the terminal housing 1. The terminal hole body 1 is a cavity structure with openings on both sides. A primary locking groove 2 is opened on the top of the terminal housing 1, and a secondary locking tongue 3 is arranged inside the terminal housing 1. A thrust structure 4 is arranged at the opening at one end of the terminal housing 1. An anti-error groove 5 is also arranged in the terminal housing 1. In order to ensure that the force of the terminal in the terminal hole is symmetrical on the left and right, two groups of secondary locking tongues 3 are arranged symmetrically on both sides inside the terminal housing 1.

[0051] In order to perform stable locking, the secondary lock tongue 3 includes a hook 31, a cantilever 32, a guide slope 33 and an anti-touch slope 34. The cantilever 32 is connected to the inner wall of the cavity of the terminal housing 1, the guide slope 33 is arranged at the end of the cantilever 32 away from the terminal housing 1, the hook 31 is arranged on the side of the guide slope 33 close to the inside, and the anti-touch slope 34 is arranged on the side of the hook 31 close to the outside. In order to prevent hitting the wall, a secondary lock clearance space 35 is provided between the anti-touch slope 34 and the inner wall of the cavity of the terminal housing 1.

[0052] In order to achieve adaptation, the terminal 6 includes a spring piece 61, a square box 62, an anti-error structure 63, a wire crimping part 64 and an insulating crimping part 65. The spring piece 61 is arranged on the upper side of the square box 62 and is inclined. The anti-error structure 63 is arranged on one side of the square box 62. The wire crimping part 64 is arranged at one end of the square box 62. The insulating crimping part 65 is connected to the wire crimping part 64. The two ends of the square box 62 are respectively the front 621 of the terminal square box and the rear 622 of the terminal square box. The wire crimping part 64 is connected to the rear 622 of the terminal square box. The upper and lower sides of the square box 62 are respectively fitted with the upper and lower sides of the cavity structure of the terminal housing 1.

[0053] In order to lock, the primary locking groove 2 is snap-fitted with the terminal spring clip 61, the hook 31 of the secondary locking tongue 3 is snap-fitted with the back 622 of the terminal square box, the thrust structure 4 is fitted with the front 621 of the terminal square box, and the terminal anti-error structure 63 is disassembled and arranged in the terminal hole anti-error groove 5.

[0054] During specific use, the terminal 6 is crimped and inserted into the terminal housing 1 along the insertion direction, and the anti-error structure 63 cooperates with the anti-error groove 5. If the terminal 6 is in the wrong direction, it cannot be assembled. During the process, the front 621 of the terminal square box first contacts the guide bevel 33, and as the terminal 6 is inserted, the secondary lock tongue 3 of the terminal housing 1 lies backward, and the anti-touch bevel 34 prevents the secondary lock tongue 3 from contacting the inner wall of the terminal housing 1 to prevent increased insertion resistance. The terminal 6 continues to be inserted until the terminal spring clip 61 cooperates with the primary lock groove 2. At this time, the back 622 of the terminal square box cooperates with the hook 31, and the front 621 of the terminal square box cooperates with the thrust device 4, so that the terminal 6 is fully positioned in the terminal housing 1, and the two locking devices of the terminal housing 1 effectively increase the holding force of the terminal 6 in the terminal housing 1, so that there is no need to design a separate TPA to increase the holding force of the terminal in the sheath.

[0055] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A connector with a double locking structure, characterized in that: The invention comprises a plug-in mating terminal housing (1) and a terminal (6), wherein the terminal housing (1) is provided with a primary locking groove (2) and a secondary locking tongue (3), and the terminal (6) is provided with a spring sheet (61) and a locking surface (66), wherein the spring sheet (61) is snap-fitted with the primary locking groove (2), and the secondary locking tongue (3) is snap-fitted with the locking surface (66).

2. The connector with a double locking structure according to claim 1, characterized in that: The terminal (6) is provided with an anti-mismatch rib (63), and an anti-mismatch groove (5) is provided in the terminal housing (1), and the anti-mismatch rib (63) is plug-fitted into the anti-mismatch groove (5).

3. The connector with double locking structure according to claim 2, characterized in that: The anti-misalignment rib (63) is a raised long strip, and the anti-misalignment rib (63) is arranged on one side edge of the terminal (6).

4. The connector with a double locking structure according to claim 1, characterized in that: A thrust structure (4) is provided at an opening of the terminal housing (1) away from the terminal (6) insertion end, and the thrust structure (4) is engaged with an end face of the terminal (6) for blocking.

5. The connector with double locking structure according to claim 4, characterized in that: Two secondary locking tongues (3) are provided, and the two secondary locking tongues (3) are symmetrically arranged inside the terminal housing (1).

6. The connector with a double locking structure according to claim 5, characterized in that: The secondary locking tongue (3) comprises a cantilever (32) connected to the inner wall of the cavity of the terminal housing (1); an end of the cantilever (32) away from the terminal housing (1) is provided with a hook (31); a side of the hook (31) close to the terminal (6) is provided with a guiding inclined surface (33), and a side away from the terminal (6) is provided with an anti-touch inclined surface (34).

7. The connector with a double locking structure according to claim 6, characterized in that: A secondary lock clearance space (35) is provided between the anti-touch inclined surface (34) and the terminal housing (1).

8. The connector with a double locking structure according to claim 7, characterized in that: One side of the locking surface (66) is sequentially connected to the wire crimping portion (64) and the insulation crimping portion (65).

9. The connector with a double locking structure according to claim 8, characterized in that: The two secondary locking tongues (3) are respectively arranged on both sides of the primary locking groove (2).

10. The connector with a double locking structure according to claim 9, characterized in that: The distance between the primary lock groove (2) and the thrust structure (4) is smaller than the distance between the secondary lock tongue (3) and the thrust structure (4).

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