A charging socket and a pin fixing structure thereof

Abstract

The utility model discloses a charging socket and pin fixed structure thereof, include: pin terminal, insulating mounting plate and casing, pin terminal front end limit and insert in the casing, and the insulating mounting plate is pressed and is arranged in the casing rear end with screw or bolt pin terminal, to carry out the retreat of pin terminal rear end with stop; Pin terminal front end is provided with the first annular step, and the first annular step is close to the side of casing and realizes the slope and slope cooperation in the casing, pin terminal rear end is provided with the insulating mounting plate contact surface, and pin terminal rear end passes through the through -hole on the insulating mounting plate and makes the insulating mounting plate contact surface and the bottom of through -hole and reach, to prevent pin terminal exit. The utility model discloses adopt both end limit fixed to provide reliable fixed for pin terminal, avoid using process and pin terminal to shake or fall off, improve installation reliability.

Description

Technical Field

[0001] This utility model relates to the field of charging socket technology, specifically, to a charging socket and its pin fixing structure. Background Technology

[0002] With the widespread use of electronic devices, pin terminals, as an important component of connectors, are widely used in AC power sockets, charging interfaces, and other scenarios. Pin terminals typically achieve electrical connections by inserting into the sockets of AC outlets, and their stability and reliability directly affect the safety and lifespan of the equipment.

[0003] However, existing pin terminals still have the following technical problems in AC sockets:

[0004] Loosening issue: Due to manufacturing tolerances or structural design defects, the clearance between the pin terminals and the socket is too large, causing loosening after insertion. Prolonged loosening may lead to poor contact, degraded electrical performance, and even electric arcing, posing a safety hazard.

[0005] The problem of detachment: Traditional pin terminals rely on friction for fixation and lack an effective anti-detachment structure. They are prone to loosening or even falling off completely when subjected to external vibration or frequent insertion and removal, affecting the normal power supply of the equipment. This problem is more prominent in mobile equipment or industrial environments.

[0006] Currently, some improved solutions enhance the fastening effect by increasing terminal elasticity or reducing socket tolerance, but this may lead to excessive insertion and extraction force, resulting in a poor user experience. Other solutions employ auxiliary locking structures, but these often increase manufacturing complexity or cost. Therefore, there is an urgent need for a pin terminal structure design that can reduce shaking and prevent detachment while also ensuring convenient insertion and extraction and cost-effectiveness. Utility Model Content

[0007] The purpose of this utility model is to provide a charging socket and its pin fixing structure to solve the technical problem of pin terminals shaking and falling off in AC sockets.

[0008] The present invention solves the above problems through the following technical solution:

[0009] A charging socket pin fixing structure includes: a pin terminal, an insulating mounting plate, and a housing. The front end of the pin terminal is inserted into the housing, and the insulating mounting plate presses the pin terminal onto the rear end of the housing using screws or bolts. The rear end of the pin terminal is prevented from retracting by the insulating mounting plate. The front end of the pin terminal has a first annular step, and the first annular step has an inclined surface on the side near the housing to form an inclined annular step, which engages with the inclined surface inside the housing. The rear end of the pin terminal has a contact surface with the insulating mounting plate, and the insulating mounting plate has several through holes. The rear end of the pin terminal passes through the through holes, and the contact surface of the insulating mounting plate abuts against the bottom of the through holes to prevent the pin terminal from retracting.

[0010] To further improve it, the diameter of the inclined surface of the annular step gradually decreases towards the side closer to the mounting bracket.

[0011] To further improve it, a second annular step is provided in the middle of the pin terminal, and a structure that cooperates with the second annular step is provided in the housing to limit the distance of the pin terminal being pushed into the housing.

[0012] To further improve it, the second annular step is a planar step.

[0013] To further improve it, the diameter of the first annular step is smaller than the diameter of the second annular step.

[0014] To further improve it, a mounting bracket is integrally formed inside the housing, and the mounting bracket has an arc-shaped bracket step that cooperates with the first annular step, and a planar bracket step that cooperates with the second annular step.

[0015] To further improve it, the through hole is configured as an oblong hole.

[0016] To further improve it, the diameter of the waist-shaped hole is larger than the maximum diameter of the pin terminal, and a semi-circular baffle is formed at the bottom of the waist-shaped hole near the housing, and the diameter of the semi-circular baffle is smaller than the diameter of the contact surface of the insulating mounting plate of the end pin.

[0017] To further improve it, the insulating mounting plate is circumferentially formed with a plurality of screw holes for mounting the insulating mounting plate, at least one of the screw holes is connected to a foolproof groove, and the rear side of the housing has a foolproof boss that cooperates with the foolproof groove.

[0018] Furthermore, this utility model also solves the above problems through the following technical solutions:

[0019] A charging socket is provided with a charging socket pin fixing structure as described above.

[0020] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0021] (1) In this utility model, the front end of the pin terminal is limited and inserted into the housing. The insulating mounting plate presses the pin terminal onto the rear end of the housing with screws or bolts. The rear end of the pin terminal is prevented from moving back by the insulating mounting plate. The pin terminal is fixed by limiting the two ends to provide reliable fixation, avoid the pin terminal from shaking or falling off during use, and improve the installation reliability.

[0022] (2) This utility model also provides multiple annular steps to improve the installation position control of the front end of the pin terminal and to make the front end of the pin terminal and the inner shell cooperate with the inclined surface to achieve axial fixation.

[0023] (3) The present invention restricts the axial movement of the pin terminal by applying pressure to the insulating mounting plate with screws. The back of the insulating mounting plate is designed to prevent incorrect installation. The insulating mounting plate is provided with several waist-shaped holes for the rear end of the pin terminal to pass through. After the pin terminal is installed in the waist-shaped hole, there is a gap at the top for the wiring assembly of the charging socket. Attached Figure Description

[0024] Figure 1 This is an exploded view of a charging socket pin fixing structure according to the present invention;

[0025] Figure 2 This is a cross-sectional schematic diagram of a charging socket pin fixing structure according to the present invention;

[0026] Figure 3 This is a schematic diagram of the mating structure between the mounting bracket and the pin terminal of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the pin terminal of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the insulating mounting plate of this utility model;

[0029] Figure 6 This is a schematic diagram of the back of the casing of this utility model.

[0030] Reference numerals: 1. Housing; 11. Arc-shaped step of bracket; 12. Planar step of bracket; 13. Terminal channel; 14. Foolproof boss; 2. Pin terminal; 21. First annular step; 22. Second annular step; 23. Contact surface of insulating mounting plate; 3. Insulating mounting plate; 31. Waist-shaped hole; 32. Foolproof groove; 33. Semi-circular baffle; 4. Screw; 5. Mounting bracket. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example:

[0033] Combined with appendix Figure 1-6 As shown, a charging socket pin fixing structure includes: a pin terminal 2, an insulating mounting plate 3, and a mounting bracket 5 disposed within a housing 1. The pin terminal 2 is positioned and axially installed via the mounting bracket 5 and the insulating mounting plate 3. The pin terminal 2 has a first annular step 21 at its front end, and the first annular step 21 has an inclined surface near the mounting bracket 5 to form an inclined annular step. The inclined annular step engages with the inclined surfaces within the housing 1. In this embodiment, the diameter of the inclined surface gradually decreases towards the mounting bracket 5 so that the pin terminal 2, when pushed into the mounting bracket 5, abuts against the arc-shaped step 11 of the bracket, achieving the engagement of the inclined surfaces and limiting the distance the pin terminal 2 is pushed into the mounting bracket. A second ring is provided in the middle of the pin terminal 2. The second annular step 22 is a planar step, and correspondingly, the mounting bracket 5 is provided with a bracket planar step 12 that cooperates with the second annular step 22, so as to limit the distance of the pin terminal 2 being pushed into the mounting bracket by the bracket planar step 12. In this embodiment, the diameter of the first annular step 21 is smaller than the diameter of the second annular step 22, so that the first annular step 21 can smoothly pass through the terminal channel 13 in the mounting bracket 5 and enter the bracket arc step 11. The rear end of the pin terminal 2 is also provided with an insulating mounting plate contact surface 23 that cooperates with the insulating mounting plate 3. The insulating mounting plate is provided with several through holes. The rear end of the pin terminal passes through the through hole and the insulating mounting plate contact surface abuts against the bottom of the through hole to prevent the pin terminal 2 from exiting from the mounting bracket 5.

[0034] Specifically, the insulating mounting plate 3 has several screw holes circumferentially formed, and at least one screw hole is connected to a foolproof groove 32. When the insulating mounting plate 3 is installed on the rear side of the mounting bracket 5 by screws 4, the foolproof groove 32 cooperates with the foolproof boss 14 on the rear side of the mounting bracket 5 to prevent reverse installation. The insulating mounting plate 3 is also provided with through holes for several pin terminals 2 to pass through, and the rear end of the pin terminal 2 can pass through the through holes and cooperate with the contact surface 23 of the insulating mounting plate to prevent the pin terminal 2 from coming out. Preferably, the through hole is configured as an oblong hole 31, the size of which is larger than the maximum diameter of the pin terminal, allowing the pin terminal to pass through directly. A semi-circular baffle 33 is formed at the bottom of the oblong hole near the housing, the size of which is smaller than the diameter of the contact surface 23 of the insulating mounting plate of the pin terminal. This allows the insulating mounting plate 3 to mate with the self-tapping threaded hole of the mounting bracket through a screw through hole, and then the insulating mounting plate is fixed to the mounting bracket by a self-tapping screw 4. The pressure applied to the insulating mounting plate by the screw restricts the axial movement of the pin terminal. After the pin terminal is installed in the oblong hole, a gap is left at the top for wiring and assembly of the charging socket.

[0035] In this embodiment, after the pin terminal is installed into the mounting bracket, it is fixed by the front and rear steps of the mounting bracket to ensure the axial fixation of the pin terminal. To prevent the pin terminal from coming loose, an insulating mounting plate 3 is added to the tail of the mounting bracket. This achieves two-stage fixation: first, the pin terminal is positioned by the mounting bracket, and then it is positioned a second time by the insulating mounting plate. This prevents the pin terminal from shaking or falling off during use and improves installation reliability.

[0036] Although the present invention has been described herein with reference to illustrative embodiments, the above embodiments are merely preferred embodiments of the present invention, and the implementation of the present invention is not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A charging socket pin fixing structure, characterized in that, include: The components include a pin terminal, an insulating mounting plate, and a housing. The front end of the pin terminal is inserted into the housing, and the insulating mounting plate is pressed and installed on the rear end of the housing by screws or bolts to prevent the pin terminal from retracting. The front end of the pin terminal is provided with a first annular step, and the first annular step has an inclined surface on the side near the housing to form an inclined annular step, and the inclined annular step and the housing achieve an inclined surface-to-inclination. The rear end of the pin terminal is provided with an insulating mounting plate contact surface. The insulating mounting plate is provided with several through holes. The rear end of the pin terminal passes through the through holes and the contact surface of the insulating mounting plate abuts against the bottom of the through holes to prevent the pin terminal from being removed.

2. The charging socket pin fixing structure according to claim 1, characterized in that, The diameter of the inclined annular step gradually decreases towards the side closer to the mounting bracket.

3. The charging socket pin fixing structure according to claim 1, characterized in that, The pin terminal is provided with a second annular step in the middle, and the housing is provided with a structure that cooperates with the second annular step to limit the distance of the pin terminal being pushed into the housing.

4. The charging socket pin fixing structure according to claim 3, characterized in that, The second annular step is a planar step.

5. The charging socket pin fixing structure according to claim 3, characterized in that, The diameter of the first annular step is smaller than the diameter of the second annular step.

6. The charging socket pin fixing structure according to claim 3, characterized in that, An integrally formed mounting bracket is provided inside the housing. The mounting bracket has an arc-shaped step that mates with the first annular step and a planar step that mates with the second annular step.

7. The charging socket pin fixing structure according to claim 1, characterized in that, The through hole is configured as an oblong hole.

8. The charging socket pin fixing structure according to claim 7, characterized in that, The diameter of the waist-shaped hole is larger than the maximum diameter of the pin terminal, and a semi-circular baffle is formed at the bottom of the waist-shaped hole near the housing. The diameter of the semi-circular baffle is smaller than the diameter of the contact surface of the insulating mounting plate of the end pin.

9. The charging socket pin fixing structure according to claim 1, characterized in that, The insulating mounting plate has a plurality of screw holes formed around its circumference for mounting the insulating mounting plate. At least one of the screw holes is connected to a foolproof groove, and the rear side of the housing has a foolproof boss that cooperates with the foolproof groove.

10. A charging socket, characterized in that, The device is provided with a charging socket pin fixing structure as described in any one of claims 1-9.

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