A new foolproof square connector

Abstract

The application relates to the field of connectors and discloses a new foolproof square connector. In the application, a plug assembly comprises a plug shell, a plug rubber core, plug female terminals, a plug sealing ring and a screw, the plug rubber core is embedded in the plug shell, the plug female terminals are arrayed and embedded in the plug rubber core, the plug sealing ring is sleeved outside the butt joint end of the plug shell, a socket assembly comprises a socket shell, socket male pins, a sheath, a socket sealing ring, a wire outlet rubber ring, a clamping jaw and a tail clamp nut, the socket shell is a through-hole structure, the socket male pins are embedded in the socket shell and correspond to the plug female terminals one by one, the sheath is sleeved outside the socket male pins, the socket sealing ring is arranged between the butt joint plane of the socket shell and the plug shell, the wire outlet rubber ring, the clamping jaw and the tail clamp nut are sequentially arranged at the wire outlet end of the socket shell, the socket shell is free of a side sealing ring, and the plug is locked to an external motor shell after penetrating through the socket shell by the screw.

Description

Technical Field

[0001] This application belongs to the field of connector technology, specifically a novel foolproof square connector. Background Technology

[0002] As electronic devices become smaller and more multifunctional, the integration requirements for plugs and connectors are increasing. Currently, most mainstream small waterproof connectors on the market are a new type of foolproof square connector design. However, in scenarios requiring more signal transmission channels or control circuits (such as precision motors and smart sensors), a single type of foolproof square connector cannot meet the needs, while a new type of foolproof square connector with larger dimensions cannot fit the existing installation space.

[0003] Meanwhile, the traditional new type of foolproof square connector has three major defects: First, the interference area of ​​the foolproof structure is small, and its ability to withstand external force insertion is weak, which can easily lead to reverse insertion and damage to the terminals; Second, there is no terminal clearance space inside the core, which limits the elastic function of the terminals, and the insertion and extraction force generally exceeds 30N, making operation difficult and the terminals are prone to permanent deformation due to excessive compression, resulting in a insertion and extraction life of less than 500 cycles; Third, the sealing structure is designed on the side of the socket, and the seal is achieved by the socket nut pressing against the side of the shell. After long-term vibration, the seal is prone to failure, resulting in poor waterproof stability, and the socket nut has low fixing strength and is easy to loosen.

[0004] For example, CN214849160U discloses a novel foolproof square connector, including a connector body and upper and lower differential pairs disposed within the connector body. The lower ends of the upper and lower differential pairs are connected by a fixing plate, and the lower differential pairs are located between the upper differential pairs, with their contact points on the same vertical plane. This invention, by setting lower and upper differential pairs, achieves twice the differential signal pairs of a conventional connector, and each differential pair in both layers can meet a rate of 16GT / s. The terminals are made of high-conductivity copper material through stamping and bending, resulting in consistent cross-sectional areas that improve SI performance such as impedance, insertion loss, and return loss. Conductive plastic connects all ground pins together to enhance SI performance. Solder balls are fixed in slots to prevent them from slipping or shifting, and solder balls are welded to the terminal heads using a soldering method, resulting in a novel foolproof square connector.

[0005] However, most existing small waterproof 7-pin connectors cannot meet the needs of all applications. The D-shaped foolproof design of 7-pin products is not stable enough. We have innovated the design of the core structure to increase the end spring opening space and solve the problems of excessive insertion and removal force, rough insertion and removal feel, and short insertion and removal life of 7-pin products. Utility Model Content

[0006] The purpose of this application is to provide a novel foolproof square connector in order to solve the problems mentioned above.

[0007] The technical solution adopted in this application is as follows: A novel foolproof square connector includes a plug assembly and a socket assembly. The plug assembly includes a plug housing, a plug core, a plug female terminal, a plug sealing ring, and screws. The plug core is embedded in the plug housing, and the plug female terminal is embedded in the plug core in an array. The plug sealing ring is sleeved on the outside of the mating end of the plug housing. The socket assembly includes a socket housing, a socket male pin, a sheath, a socket sealing ring, a wire exit ring, a claw, and a tail clip nut. The socket housing has a through-hole structure. The socket male pin is embedded in the socket housing and corresponds one-to-one with the plug female terminal. The sheath is sleeved on the outside of the socket male pin. The socket sealing ring is located between the mating planes of the socket housing and the plug housing. The wire exit ring, claw, and tail clip nut are sequentially installed on the wire exit end of the socket housing. The socket housing has no side sealing ring, and the plug is screwed through the socket housing and locked to the external motor housing.

[0008] In a preferred embodiment, the female plug terminals of the plug core are arranged in a square array.

[0009] In a preferred embodiment, the mating ends of the plug housing and the socket housing are provided with a foolproof structure, and the foolproof structure includes a platform foolproof part disposed on both sides of the mating end of the plug housing, and the socket housing is provided with a groove adapted to the platform foolproof part at the corresponding position.

[0010] In a preferred embodiment, both the plug sealing ring and the socket sealing ring are made of nitrile rubber with a Shore hardness of 50-60HA.

[0011] In a preferred embodiment, the female plug terminal is made of phosphor bronze.

[0012] In a preferred embodiment, the inner wall of the outlet end of the socket housing is provided with an annular groove, and the claw is embedded in the annular groove, and the tail clip nut is threadedly connected to the outlet end of the socket housing.

[0013] In a preferred embodiment, the surface of the socket housing is provided with a plurality of mounting holes.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0015] This application improves accuracy and adaptability, expanding its application scenarios: Within the same external dimensions as a traditional 7-pin waterproof connector, a 9-pin design is achieved by optimizing the spatial layout, eliminating the side sealing ring of the socket, and adjusting the nut installation position. This adds two signal / control channels, meeting the multi-line transmission needs of precision motors, multi-sensor devices, and other equipment. Simultaneously, it directly replaces the traditional 7-pin connector without altering the original installation space, offering strong adaptability and increasing application scenarios. Reduced insertion and extraction force makes the operation smoother and less strenuous, improving insertion and extraction lifespan. The sealing structure is changed from a side compression seal to an axial compression seal, resulting in more stable waterproof performance. The plug fixing nut is designed on the motor housing, providing a more secure fixation and better reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the exploded structure of the novel plug connector of this application;

[0017] Figure 2 This is a schematic diagram of the overall structure of the novel plug connector in this application;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the terminal insertion core in this application;

[0019] Figure 4 This is a schematic diagram of the front and back sides after installation in this application.

[0020] The markings in the diagram are: 1. Screw; 2. Plug housing; 3. Plug female terminal; 4. Plug core; 5. Plug sealing ring; 6. Socket housing; 7. Socket male pin; 8. Sheath; 9. Socket sealing ring; 10. Cable exit ring; 11. Claw; 12. Tail clip nut; 14. Plug assembly; 15. Mounting hole; 16. Socket assembly. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] Example:

[0023] Reference Figure 1-3A novel foolproof square connector includes a plug assembly 14 and a socket assembly 16. The plug assembly 14 includes a plug housing 2, a plug core 4, a plug female terminal 3, a plug sealing ring 5, and a screw 1. The plug core 4 is embedded in the plug housing 2, and the plug female terminals 3 are arrayed within the plug core 4. The plug sealing ring 5 is fitted onto the outer side of the mating end of the plug housing 2. The socket assembly 16 includes a socket housing 6, a socket male pin 7, a sheath 8, a socket sealing ring 9, a lead-out rubber ring 10, a claw 11, and a tail clip nut 12. The socket housing 6 has a through-hole structure. The socket male pin 7 is embedded in the socket housing 6 and corresponds one-to-one with the plug female terminal 3. The sheath 8 is fitted onto the outside of the socket male pin 7. On the side, the socket sealing ring 9 is set between the mating plane of the socket housing 6 and the plug housing 2. The wire outlet rubber ring 10, the claw 11, and the tail clip nut 12 are installed sequentially at the wire outlet end of the socket housing 6. The socket housing 6 has no side sealing ring, and the plug is locked to the external motor housing after passing through the socket housing 6 with the screw 1. The overall composition and core assembly relationship of the connector are clearly defined. By eliminating the side sealing ring of the socket and integrating the nut function into the motor housing, a 9-pin layout is achieved in a limited space. At the same time, axial compression sealing and screw 1 locking fixation are adopted to solve the problems of insufficient pin count, unstable waterproofing, and weak fixation of traditional 7-pin connectors, providing basic structural support for multi-line transmission scenarios.

[0024] Reference Figure 1-3 The plug female terminal 3 of the plug core 4 is arranged in a square array. Through the square compact array layout, 9 pins are integrated in the optimized core space to meet the needs of multi-signal transmission. The limited spacing between adjacent terminals avoids signal interference, and the space provided provides a safe retreat channel for the terminal elastic arm to prevent excessive deformation of the terminal during insertion and removal. This reduces the insertion and removal force while extending the service life of the terminal, solving the problems of difficult insertion and removal and easy damage of terminals in traditional 7-pin connectors.

[0025] Reference Figure 1-2 The mating ends of the plug housing 2 and the socket housing 6 are provided with a foolproof structure. The foolproof structure includes a platform foolproof part set on both sides of the mating end of the plug housing 2. The socket housing 6 is provided with a groove that matches the platform foolproof part at the corresponding position. Through the double foolproof design of "platform on both sides + foolproof rib in the middle", the foolproof interference area is greatly increased, which improves the resistance to external force insertion by 3-5 times compared with the traditional D-shaped foolproof, and effectively avoids terminal damage caused by reverse insertion.

[0026] Reference Figure 1-2 Both the plug sealing ring 5 and the socket sealing ring 9 are made of nitrile rubber with a Shore hardness of 50-60HA. The nitrile rubber material ensures that the sealing ring has excellent oil resistance and aging resistance, making it suitable for industrial applications such as motors.

[0027] Reference Figure 1The female terminal 3 of the plug is made of phosphor bronze. The phosphor bronze material and high resilience coefficient ensure that the female terminal is elastic and durable, avoiding poor contact after long-term plugging and unplugging.

[0028] Reference Figure 1-2 The inner wall of the outlet end of the socket housing 6 is provided with an annular groove, and the claw 11 is embedded in the annular groove. The tail clip nut 12 is threadedly connected to the outlet end of the socket housing 6. The clamping force of the split claw 11 ensures that the cable is firmly fixed and avoids the cable pulling causing the internal wiring to loosen. The tail clip nut 12 squeezes the silicone outlet ring 10 to form a secondary seal between the cable and the socket housing 6.

[0029] Reference Figure 1-4 The socket housing 6 has multiple mounting holes 15 on its surface, which facilitates the fixed installation of the structure.

[0030] The implementation principle of the novel foolproof square connector embodiment of this application is as follows:

[0031] By eliminating the sealing ring structure on the side of the socket housing 6, the lateral space originally used for side sealing is transferred to the core area. At the same time, the socket nut function is integrated into the external motor housing, and the socket housing 6 is changed to a through-hole structure. The plug screw 1 is directly locked to the motor housing, further saving vertical space. The space saved is used to enlarge the size of the plug core 4, and a square compact array layout of 9 terminals is adopted. Without increasing the overall size of the connector, the number of pins is increased from 7 to 9, meeting the needs of multi-line transmission.

[0032] The two side platforms of the plug mating end cooperate with the socket groove to form a horizontal anti-mistake mechanism; the middle anti-mistake rib cooperates with the socket anti-mistake groove to form a vertical anti-mistake mechanism. The double anti-mistake structure greatly increases the interference area. When reverse insertion occurs, the anti-mistake structure directly blocks the mating and avoids damage to the terminal contact. At the same time, the terminal clearance space in the plug core 4 provides a clearance channel for the terminal elastic arm. When plugging or unplugging, the terminal elastic arm can open into the clearance space, reducing the plugging and unplugging resistance and avoiding excessive deformation of the elastic arm due to lack of clearance space, thus extending the terminal life.

[0033] When the plug and socket are connected, the plug housing 2 causes the plug sealing ring 5 to fit against the mating surface of the socket housing 6. During the tightening of the screw 1, the plug housing 2 applies axial pressure to the socket housing 6, compressing the socket sealing ring 9 to form an axial seal. Compared with the traditional side seal, the axial seal has a more uniform force distribution and is not affected by lateral vibration, making it more waterproof and stable. The screw 1 penetrates the socket housing 6 and is locked to the motor housing. The rigid support of the motor housing greatly improves the fixing strength, avoiding the problem of loosening of the traditional socket nut. At the same time, eliminating the side seal reduces the risk of seal failure.

[0034] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A novel foolproof square connector, comprising a plug assembly (14) and a socket assembly (16), characterized in that: The plug assembly (14) includes a plug housing (2), a plug core (4), a plug female terminal (3), a plug sealing ring (5), and a screw (1). The plug core (4) is embedded in the plug housing (2), and the plug female terminal (3) is embedded in the plug core (4) in an array. The plug sealing ring (5) is sleeved on the outside of the mating end of the plug housing (2). The socket assembly (16) includes a socket housing (6), a socket male pin (7), a sheath (8), a socket sealing ring (9), a wire outlet ring (10), a claw (11), and a tail clip nut (12). The socket housing (6) has a through hole structure. The male socket pin (7) is embedded in the socket housing (6) and is matched with the female plug terminal (3) one by one. The sheath (8) is sleeved on the outside of the male socket pin (7). The socket sealing ring (9) is set between the mating plane of the socket housing (6) and the plug housing (2). The wire outlet rubber ring (10), the claw (11), and the tail clip nut (12) are installed in sequence at the wire outlet end of the socket housing (6). The socket housing (6) has no side sealing ring, and the plug is locked to the external motor housing after passing through the socket housing (6) with a screw (1).

2. The novel foolproof square connector as described in claim 1, characterized in that: The plug female terminals (3) of the plug core (4) are arranged in a square array.

3. The novel foolproof square connector as described in claim 1, characterized in that: The plug housing (2) and the socket housing (6) are provided with a foolproof structure at their mating ends, and the foolproof structure includes a platform foolproof part provided on both sides of the mating end of the plug housing (2), and the socket housing (6) is provided with a groove adapted to the platform foolproof part at the corresponding position.

4. The novel foolproof square connector as described in claim 1, characterized in that: Both the plug sealing ring (5) and the socket sealing ring (9) are made of nitrile rubber with a Shore hardness of 50-60HA.

5. A novel foolproof square connector as described in claim 1, characterized in that: The female plug terminal (3) is made of phosphor bronze.

6. A novel foolproof square connector as described in claim 1, characterized in that: The inner wall of the outlet end of the socket housing (6) is provided with an annular groove, and the claw (11) is embedded in the annular groove. The tail clip nut (12) is threadedly connected to the outlet end of the socket housing (6).

7. A novel foolproof square connector as described in claim 1, characterized in that: The socket housing (6) has multiple mounting holes (15) on its surface.

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