A three-core plug with a lock catch and accurate positioning

Abstract

The utility model relates to three core plug technical field with lock catch and accurate positioning, concretely is a kind of three core plug with lock catch and accurate positioning, including male plug, female plug and positioning structure, male end elastic clamping piece and female end elastic contact sheet form double elastic contact structure, and elastic force after plugging ensures that conducting pin and conducting slot are closely combined, and the incidence of poor contact is reduced, compared with traditional rigid contact structure, it is improved, the volume is reduced compared with same specification traditional connector, it is suitable for compact installation space of photoelectric equipment, positioning structure guides male, female plug accurate butt joint, avoid misplacement damage contact component when plugging, prevent stupid structure effectively and prevent misplug, sealing washer forms dustproof waterproof seal, cooperate with anti -skid line, further improve operating safety and connector service life, and the surface of conducting part conducting plating layer enhances conductivity and wear resistance.

Description

Technical Field

[0001] This utility model relates to the technical field of three-core plugs with locking and accurate positioning, specifically a three-core plug with locking and accurate positioning. Background Technology

[0002] As is well known, in the optoelectronic industry, small-volume power connectors are key components for achieving stable power conduction between devices and power sources. They need to meet the power conduction requirements of 20A / 250V within a compact installation space.

[0003] Existing small-volume 3-pin power connectors generally suffer from insufficient contact reliability. To adapt to small-volume designs, traditional connectors often use rigid contact plates. During insertion and removal, external forces can easily cause the contact plates to deform or shift, creating gaps between conductive parts. Especially after long-term and frequent insertion and removal, the elasticity of the contact plates weakens, leading to poor contact. This not only affects stable power conduction but may also cause localized heating due to increased contact resistance, posing safety hazards. Therefore, they cannot meet the high reliability requirements of optoelectronic devices for power connections. Summary of the Invention

[0004] The purpose of this invention is to provide a three-core plug with a locking mechanism and accurate positioning to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a three-core plug with a locking mechanism and accurate positioning, comprising: Male connector, used for connecting to an external power source; The female plug is used to connect to the optoelectronic equipment and can be plugged into and unplugged with the male plug. The male plug includes a male insulating shell and a male contact assembly. The male contact assembly is located inside the male insulating shell and includes three conductive pins and an elastic clamping member. The conductive pins extend along the length of the male insulating shell, and the elastic clamping member is fixed to the root of the conductive pins to clamp and fix the conductive pins and provide elastic buffering. The female connector includes a female insulating shell and a female contact assembly. The female contact assembly is disposed within the female insulating shell and includes three conductive slots and an elastic contact piece. The conductive slots are adapted to the conductive pins of the male connector, and the elastic contact piece is fixed to the inner wall of the conductive slot for tight contact with the conductive pins. The male and female plugs are provided with a positioning structure to guide them to be inserted and removed accurately, and they are also provided with a foolproof structure to prevent misinsertion.

[0006] Preferably, both the male and female insulating shells are integrally formed black insulating structures. The male and female insulating shells are provided with a 3-core mounting cavity extending along the length direction. Three conductive pins and three conductive slots are respectively arranged in the mounting cavity in a linear distribution.

[0007] Furthermore, the elastic clamping element of the male contact assembly is a copper alloy spring sheet. The spring sheet has a U-shaped structure with its opening facing the conductive pin. Both ends of the spring sheet are fixed to the inner wall of the male insulating shell, and the middle part abuts against the root of the conductive pin. It can undergo elastic deformation as the conductive pin is inserted or removed.

[0008] Furthermore, the elastic contact piece of the female end contact assembly is an arc-shaped copper alloy sheet, with at least two sheets spaced apart along the length of the conductive slot. The arc-shaped convex surface faces the center of the conductive slot, and can be squeezed to generate elastic force when the conductive pin is inserted, so that the contact piece and the conductive pin are tightly fitted together.

[0009] In a further embodiment, the positioning structure includes a positioning pin and a positioning hole. The positioning pin is vertically fixed to the end face of the male end insulating housing plug-in end, and the positioning hole is opened on the end face of the female end insulating housing plug-in end, which is adapted to the positioning pin. When the positioning pin is inserted into the positioning hole, it can guide the male and female plugs to connect.

[0010] Based on the aforementioned solution, the anti-mistake structure includes an anti-mistake boss and an anti-mistake groove. The anti-mistake boss is located on the side wall of the male end insulating shell and extends along the insertion and removal direction. The anti-mistake groove is located on the side wall of the female end insulating shell and is adapted to the anti-mistake boss. When the anti-mistake boss and the anti-mistake groove are aligned, the male and female plugs can be inserted and removed.

[0011] Furthermore, based on the aforementioned solution, both the male and female insulating housings have sealing gaskets on their plug-in end faces. The sealing gaskets are made of elastic rubber and fit snugly against the housing end faces. When the male and female plugs are connected, the sealing gaskets are squeezed together to form a seal.

[0012] Furthermore, based on the aforementioned scheme, both the conductive pin and the conductive slot are provided with a conductive plating layer, which covers the outer surface of the pin and the inner wall of the slot. The outer sides of both the male end insulating shell and the female end insulating shell are provided with anti-slip textures, which are distributed along the insertion and removal direction.

[0013] Compared with existing technologies, the beneficial effects of this invention are as follows: This three-core plug with a locking mechanism and accurate positioning features a double elastic contact structure formed by the elastic clamping element at the male end and the elastic contact piece at the female end. After insertion and removal, the elastic force ensures that the conductive pins and conductive slots fit tightly, reducing the incidence of poor contact and improving upon traditional rigid contact structures. The integrated insulating shell and the triangularly distributed 3-core structure meet the 20A / 250V conduction requirements while reducing the size compared to traditional connectors of the same specification, making it suitable for compact installation spaces in optoelectronic equipment. The positioning structure guides the male and female plugs to accurately align, preventing misalignment and damage to the contact components during insertion and removal. The foolproof structure effectively prevents misinsertion. The sealing gasket forms a dustproof and waterproof seal, and the anti-slip texture further enhances operational safety and connector lifespan. The conductive plating on the surface of the conductive components enhances conductivity and wear resistance. The copper alloy elastic components have a fatigue life of over 1000 insertion and removal cycles. The entire device has no electrical control components, making it suitable for complex working conditions such as dust and vibration in the optoelectronic industry. Attached Figure Description

[0014] Figure 1 This is a side view of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the sealing gasket of this utility model; Figure 3 This is a schematic diagram of the male plug of this utility model; Figure 4 This is a schematic diagram of the structure of the male end contact assembly of this utility model; Figure 5 This is a schematic diagram of the structure of the female plug of this utility model; Figure 6 This is a schematic diagram of the female end contact assembly of this utility model.

[0015] In the diagram: 1. Male plug; 2. Female plug; 3. Male end insulating shell; 4. Male end contact assembly; 5. Conductive pin; 6. Flexible clamp; 7. Female end insulating shell; 8. Female end contact assembly; 9. Conductive slot; 10. Flexible contact piece; 11. Positioning structure; 12. Foolproof structure; 13. Mounting cavity; 14. Positioning pin; 15. Positioning hole; 16. Foolproof boss; 17. Foolproof groove; 18. Sealing gasket; 19. Conductive plating; 20. Anti-slip texture. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0017] See Figures 1-6A locking and accurately positioned three-core plug achieves a stable and reliable connection between optoelectronic devices and power supplies through a collaborative design of "double elastic contact + precise positioning guidance + foolproof and mis-insertion prevention + sealed protection". The core solution is as follows: the male plug 1 and the female plug 2 conduct power through plugging and unplugging. The elastic clamp 6 at the male end fixes the conductive pin 5 and buffers the impact of plugging and unplugging. The elastic contact piece 10 at the female end ensures that the conductive pin 5 and the conductive slot 9 fit tightly. The positioning structure 11 guides the two to accurately connect. The foolproof structure 12 avoids mis-insertion. The sealing gasket 18 and anti-slip texture 20 further improve the safety and environmental adaptability. All components work closely together through one-piece molding, elastic fitting, and precise fitting, which solves the problems of unreliable contact and easy mis-insertion of traditional three-core plugs. It is suitable for small-volume power connection scenarios of optoelectronic devices (such as laser modules and optical sensors) and meets the stable conduction requirements in compact installation spaces.

[0018] First, refer to Figure 1 In this embodiment, the male plug 1 is used to connect to an external power source. It is long and narrow. The male end insulating shell 3 is made of black insulating plastic and is injection molded in one piece. The surface is smooth and burr-free. A three-core mounting cavity 13 (linearly distributed to accommodate three conductive pins 5) is opened along the length direction inside. The inner wall of the mounting cavity 13 is polished to avoid scratching the conductive pins 5. The end face of the shell insertion end has a reserved mounting hole for a positioning pin 14. The side wall is provided with a foolproof protrusion 16 and anti-slip texture 20. The anti-slip texture 20 is distributed along the insertion and removal direction to enhance the grip friction and prevent slippage during insertion and removal.

[0019] The male contact assembly 4 is located in the 3-core mounting cavity 13 of the male insulating housing 3, and includes three conductive pins 5 and an elastic clamping member 6. The conductive pins 5 are made of copper alloy and have a conductive plating layer 19 (such as tin plating or gold plating) on ​​their surface, which covers the outer surface of the pins to improve conductivity and wear resistance. The pins extend along the length of the male insulating housing 3, with one end extending out of the housing for insertion into the conductive slot 9 of the female plug 2, and the other end remaining in the housing for connection of the power cord.

[0020] The elastic clamping element 6 is a U-shaped copper alloy spring with its opening facing the conductive pin 5. Both ends of the spring are fixed to the inner wall of the male end insulating shell 3 by snaps, and the middle part abuts against the root of the conductive pin 5. When the conductive pin 5 is inserted or removed, the spring can undergo elastic deformation with slight displacement of the pin, which not only fixes the position of the conductive pin 5 and prevents the pin from shifting, but also buffers the impact during the insertion and removal process and avoids the pin from being deformed due to rigid collision.

[0021] Then, refer to Figure 5In this embodiment, the female plug 2 is used to connect to the optoelectronic device and can be plugged into the male plug 1. The female end insulating shell 7 is also made of black insulating plastic and is integrally injection molded. The interior has a 3-core mounting cavity 13 along the length direction (corresponding to the male end mounting cavity 13, linearly distributed). The size of the mounting cavity 13 is adapted to the conductive slot 9. The shell plug-in end face has a positioning hole 15 (adapted to the male end positioning pin 14). The side wall has a foolproof groove 17 (adapted to the male end foolproof boss 16). The outer side is also provided with anti-slip texture 20 along the plugging and unplugging direction for easy gripping and operation.

[0022] The female contact assembly 8 is located in the 3-core mounting cavity 13 of the female insulating housing 7, including three conductive slots 9 and elastic contact pieces 10. The conductive slots 9 are made of copper alloy, are hollow tubes, and are plated with a conductive plating layer 19 (covering the inner wall of the slot). They are adapted to the size of the conductive pins 5 of the male plug 1 to ensure that there is no obvious gap after the pins are inserted. One end of the slot is open to receive the conductive pins 5, and the other end remains in the housing to connect the wires of the optoelectronic equipment.

[0023] The elastic contact piece 10 is an arc-shaped copper alloy piece, with at least two pieces spaced apart along the length of the conductive slot 9. The arc-shaped convex surface faces the center of the conductive slot 9. When the conductive pin 5 is inserted, the arc-shaped convex surface is squeezed to generate elastic force, so that the contact piece and the outer surface of the conductive pin 5 are tightly fitted. Even if there is a slight dimensional deviation of the pin or after long-term insertion and removal, the elastic force can still maintain tight contact and avoid poor contact.

[0024] Secondly, see Figure 1 In this embodiment, the positioning structure 11 is provided on the insertion end face of the male plug 1 and the female plug 2 to guide the two to accurately connect and avoid misalignment and damage to the contact components. The positioning pin 14 is a cylindrical plastic part (or metal part) that is vertically fixed to the insertion end face of the male end insulating shell 3 and located on one side of the 3-core mounting cavity 13. Its size is adapted to the positioning hole 15 of the female end. The positioning pin 14 has a smooth surface and a tapered guide head at the end to facilitate quick alignment when inserted into the positioning hole 15.

[0025] The positioning hole 15 is a circular through hole, which is opened on the end face of the female insulating shell 7 and corresponds to the position of the male positioning pin 14. When the male and female plugs 2 are connected, the positioning pin 14 is first inserted into the positioning hole 15. The cooperation between the pin and the hole guides the conductive pin 5 to accurately align with the conductive slot 9, avoiding slot scratches or poor contact caused by pin deviation, and ensuring smooth insertion and removal.

[0026] Again, see Figure 2In this embodiment, the anti-misplacement structure 12 is provided on the side wall of the male plug 1 and the female plug 2 to prevent mis-insertion and avoid circuit damage caused by reverse or misaligned insertion of the plug. The anti-misplacement protrusion 16 is a long strip protrusion integrally formed on the side wall of the male end insulating shell 3 and extends along the insertion and removal direction. The height and width of the protrusion are adapted to the anti-misplacement groove 17 of the female end.

[0027] The anti-misalignment groove 17 is a long, narrow recess located on the side wall of the female end insulating housing 7. It is perfectly matched in position and size with the male end anti-misalignment protrusion 16. Only when the anti-misalignment protrusion 16 is aligned with the anti-misalignment groove 17 can the male and female plugs 2 be inserted and removed smoothly. If the direction is incorrect or misaligned, the anti-misalignment protrusion 16 will be blocked by the side wall of the female end insulating housing 7 and cannot be inserted, thus eliminating the risk of misinsertion from a structural perspective.

[0028] In addition, see Figure 2 In this embodiment, the sealing gasket 18 is made of elastic rubber and is respectively attached to the plug-in end face of the male end insulating shell 3 and the female end insulating shell 7, and is completely attached to the shell end face. When the male and female plugs 2 are connected, the sealing gaskets 18 at both ends are squeezed against each other to generate elastic deformation, filling the tiny gap between the shell end faces, forming a dustproof and waterproof seal, preventing external dust and moisture from entering the mounting cavity 13 and affecting the conductivity of the contact component.

[0029] The conductive plating layer 19 covers the outer surface of the conductive pin 5 and the inner wall of the conductive slot 9, which not only improves conductivity and reduces contact resistance, but also isolates air and moisture, prevents the copper alloy substrate from oxidizing and rusting, and extends the service life of the contact components.

[0030] In addition, see Figure 1 In this embodiment, to achieve the "locking" function, an elastic buckle (made of plastic and integrally formed with the housing) is added to the side wall of the male end insulating housing 3. A buckle groove is opened at the corresponding position of the female end insulating housing 7. When the male and female plugs 2 are fully connected, the elastic buckle is embedded into the buckle groove under the elastic action of the housing to form a lock, preventing the plug from falling off due to vibration or accidental pulling. When disassembling, press the elastic buckle to make it disengage from the buckle groove, and the male plug 1 can be pulled out. The operation is convenient and the locking is reliable.

[0031] In addition, see Figure 1 In this embodiment, the male end elastic clamp 6 fixes the conductive pin 5 to prevent the pin from shifting. The female end elastic contact piece 10 fits tightly when the pin is inserted, and maintains the contact pressure through elastic force. Even if the elasticity decays after long-term insertion and removal, it can still ensure reliable contact between the conductive pin 5 and the conductive slot 9, reducing the risk of poor contact. The conductive plating layer 19 further improves the conduction stability and avoids the increase in resistance caused by oxidation.

[0032] During insertion and removal, the male end positioning pin 14 is first inserted into the female end positioning hole 15 to guide the conductive pin 5 to align with the conductive slot 9. At the same time, the male end anti-misalignment boss 16 must be aligned with the female end anti-misalignment groove 17, otherwise it cannot be inserted. The two work together to achieve the process of "positioning first, preventing misinsertion, and then docking", avoiding damage to the contact components due to misalignment.

[0033] After docking, the sealing gasket 18 is compressed to form a dustproof and waterproof seal, protecting the contact components. The elastic buckle of the locking structure is embedded in the buckle groove to lock the plug position and prevent accidental dislodgement. The anti-slip texture 20 enhances the stability of grip operation and is suitable for scenarios where the installation space of optoelectronic equipment is small and the operation is inconvenient.

[0034] In addition, see Figure 1 In this embodiment, the dual elastic structure (male end elastic clamp 6 + female end elastic contact piece 10) ensures tight fit of conductive components, reducing the risk of poor contact. The conductive plating layer 19 improves conductivity and wear resistance, adapting to long-term frequent insertion and removal scenarios. The positioning structure 11 guides precise docking, the foolproof structure 12 prevents reverse or misaligned insertion, avoiding circuit damage, the locking structure prevents accidental detachment, adapting to vibration environments, the sealing gasket 18 is dustproof and waterproof, and the insulating shell and anti-slip texture 20 enhance operational safety, adapting to the compact installation space and complex working conditions (such as dust and slight vibration) of optoelectronic equipment.

[0035] In addition, see Figure 1 In this embodiment, it is applicable to optoelectronic devices such as laser printers and optical sensors, enabling stable power conduction within a compact installation space, avoiding equipment downtime due to poor contact, and is compatible with small electronic instruments (such as portable testing equipment). It meets the requirements for plug-in and plug-out operations and stable power conduction in small spaces, taking into account both convenience and reliability.

[0036] Finally, see Figure 1 In this embodiment, the insulating shell 7 of the male and female ends is replaced with high-temperature resistant insulating plastic (such as PA66 + glass fiber) to adapt to high-temperature environments (such as heat dissipation areas of optoelectronic equipment) and avoid shell deformation due to high temperature. The elastic contact piece 10 and the elastic clamping member 6 are replaced with phosphor bronze material to improve elastic fatigue life and adapt to more frequent insertion and removal needs.

[0037] Working principle: When using this three-core plug with a locking mechanism and accurate positioning, the operator first holds the anti-slip texture 20 of the male plug 1 and the female plug 2, observes the position of the anti-misalignment protrusion 16 and the anti-misalignment groove 17, and ensures that they are aligned (anti-misalignment protrusion 16 aligns with anti-misalignment groove 17). Align the positioning pin 14 of the male plug 1 with the positioning hole 15 of the female plug 2, and gently push the male plug 1. The positioning pin 14 first inserts into the positioning hole 15, guiding the conductive pin 5 to gradually enter the conductive slot 9 of the female plug 2. During the process, the anti-misalignment protrusion 16 slides along the anti-misalignment groove 17. If the direction is incorrect, the anti-misalignment protrusion 16 will be blocked and cannot be inserted further, thus avoiding misinsertion.

[0038] When the conductive pin 5 is inserted into the conductive slot 9, it presses the elastic contact piece 10 of the female end, and the contact piece generates elastic force to fit tightly with the pin. At the same time, the elastic clamp 6 of the male end deforms slightly with the displacement of the pin to buffer the impact. When the male and female plugs 2 are fully connected, the elastic buckle of the male end is embedded into the buckle groove of the female end to form a lock, and the sealing gaskets 18 are pressed against each other to form a seal.

[0039] After docking, the external power supply is conducted to the optoelectronic device through the male conductive pin 5 and the female conductive slot 9. The conductive coating 19 makes contact with the elastic plate to ensure stable current. When disassembling, press the male elastic buckle to disengage it from the female buckle slot, pull the male plug 1 in the opposite direction, and the conductive pin 5 is pulled out from the conductive slot 9. The elastic clamp 6 and the elastic contact piece 10 return to their original state, waiting for the next docking.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-core plug with a locking mechanism and accurate positioning, characterized in that, include: Male plug (1) is used to connect to an external power source; The female plug (2) is used to connect to the optoelectronic equipment and can be plugged in and out with the male plug (1); The male plug (1) includes a male end insulating shell (3) and a male end contact assembly (4). The male end contact assembly (4) is located inside the male end insulating shell (3) and includes three conductive pins (5) and an elastic clamping member (6). The conductive pins (5) extend along the length of the male end insulating shell (3), and the elastic clamping member (6) is fixed to the root of the conductive pins (5) to clamp and fix the conductive pins (5) and provide elastic buffer. The female plug (2) includes a female end insulating shell (7) and a female end contact assembly (8). The female end contact assembly (8) is disposed inside the female end insulating shell (7) and includes three conductive slots (9) and an elastic contact piece (10). The conductive slots (9) are adapted to the conductive pins (5) of the male plug (1). The elastic contact piece (10) is fixed to the inner wall of the conductive slots (9) for close contact with the conductive pins (5). A positioning structure (11) is provided between the male plug (1) and the female plug (2) to guide them to be inserted and removed accurately. Both are also provided with a foolproof structure (12) to prevent misinsertion.

2. The three-core plug with locking mechanism and accurate positioning according to claim 1, characterized in that, The male end insulating shell (3) and the female end insulating shell (7) are both integrally formed black insulating structures. The male end insulating shell (3) and the female end insulating shell (7) are provided with a 3-core mounting cavity (13) extending along the length direction. Three conductive pins (5) and three conductive slots (9) are respectively provided in the mounting cavity (13) and are distributed in a linear shape.

3. The three-core plug with locking mechanism and accurate positioning according to claim 2, characterized in that, The elastic clamping member (6) of the male end contact assembly (4) is a copper alloy spring sheet. The spring sheet has a U-shaped structure with the opening facing the conductive pin (5). The two ends of the spring sheet are fixed to the inner wall of the male end insulating shell (3), and the middle part abuts against the root of the conductive pin (5). It can generate elastic deformation as the conductive pin (5) is inserted and pulled out.

4. The three-core plug with locking mechanism and accurate positioning according to claim 3, characterized in that, The elastic contact piece (10) of the female end contact assembly (8) is an arc-shaped copper alloy piece. At least two pieces are arranged at intervals along the length direction of the conductive slot (9). The arc-shaped convex surface faces the center of the conductive slot (9). When the conductive pin (5) is inserted, it can be squeezed to generate elastic force, so that the contact piece and the conductive pin (5) fit tightly together.

5. The three-core plug with locking mechanism and accurate positioning according to claim 4, characterized in that, The positioning structure (11) includes a positioning pin (14) and a positioning hole (15). The positioning pin (14) is vertically fixed to the plug-in end face of the male end insulating shell (3). The positioning hole (15) is opened on the plug-in end face of the female end insulating shell (7) and is adapted to the positioning pin (14). When the positioning pin (14) is inserted into the positioning hole (15), it can guide the male and female plugs (2) to connect.

6. The three-core plug with locking mechanism and accurate positioning according to claim 5, characterized in that, The anti-mistake structure (12) includes an anti-mistake boss (16) and an anti-mistake groove (17). The anti-mistake boss (16) is located on the side wall of the male end insulating shell (3) and extends along the insertion and removal direction. The anti-mistake groove (17) is located on the side wall of the female end insulating shell (7) and is adapted to the anti-mistake boss (16). When the anti-mistake boss (16) and the anti-mistake groove (17) are aligned, the male and female plugs (2) can be inserted and removed.

7. The three-core plug with locking mechanism and accurate positioning according to claim 6, characterized in that, Both the male end insulating shell (3) and the female end insulating shell (7) have sealing gaskets (18) on their plug-in end faces. The sealing gaskets (18) are made of elastic rubber and fit against the shell end faces. When the male and female plugs (2) are connected, the sealing gaskets (18) are squeezed together to form a seal.

8. The three-core plug with locking mechanism and accurate positioning according to claim 7, characterized in that, The conductive pin (5) and the conductive slot (9) are both provided with a conductive plating layer (19). The conductive plating layer (19) covers the outer surface of the pin and the inner wall of the slot. The outer side of the male end insulating shell (3) and the female end insulating shell (7) are provided with anti-slip texture (20). The texture is distributed along the insertion and removal direction.

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