A three-pole power plug with protection function and modularity

Abstract

This utility model discloses a modular three-pole power plug with protective functions. The plug includes a lower housing and an upper housing covering it. A base is provided between the lower housings, and the base has multiple conductive plug terminals. Each conductive plug terminal has a bent wiring portion. The base has a detachable protective shell, and the protective shell has a cavity for accommodating the wiring portion. Multiple locking portions are provided below the cavity and between adjacent cavities. The base and protective shell provide double protection for the conductive plug terminals, improving structural strength and heat resistance. When the conductive plug terminals experience abnormal temperature increases due to overload or short circuit, the base and protective shell preferentially absorb and disperse heat. Even if local melting occurs, the large contact area between the base and the upper and lower housings ensures overall structural stability, ensuring safe insertion and removal, preventing live parts from remaining in the socket, and enhancing reliability under extreme conditions.

Description

Technical Field

[0001] This utility model relates to the field of plug technology, and in particular to a modular three-pole power plug with protective function. Background Technology

[0002] As a crucial connecting component between electronic devices and power systems, a plug typically consists of a housing and multiple internal prong terminals. These prong terminals achieve electrical connection with wires via terminal blocks. Currently, most prong terminals rely on the clamping force between the upper and lower housings for fixation, and the housing alone provides physical protection.

[0003] When the plug terminals generate high temperatures due to overload or short circuit, causing the housing material to melt, and under these conditions, insertion or removal operations may lead to the plug terminals disintegrating from the housing, leaving live terminals trapped inside the socket and posing a continuous safety hazard to surrounding personnel. Current technology does not adequately consider structural failure mechanisms and emergency protection measures under high-temperature environments and urgently needs improvement. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the traditional three-prong power plug design and to provide a product that enhances reliability and improves safety.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A modular three-pole power plug with protective function includes a lower housing and an upper housing covering the lower housing. A base is provided between the lower housing and the base is provided with multiple conductive plug terminals. Each conductive plug terminal has a bent wiring portion. The base is provided with a detachable protective shell. The protective shell has a cavity for accommodating the wiring portion. Multiple locking portions are provided below the cavity and below the adjacent cavities, which are pressed against the base to connect and fix the protective shell to the base.

[0007] Preferably, the lower housing is provided with fastening screws and threadedly connected to the upper housing, and the lower housing and the upper housing are provided with wire holes for wires to enter therein.

[0008] Preferably, the lower housing is provided with a first pressure groove and a second pressure groove, and is located at the outlet of the wire hole. A pressure plate is provided above the first pressure groove and the second pressure groove. The pressure plate has several protrusions at both ends. One of the protrusions has pressure parts that taper towards the center on both sides and is located between the first pressure groove and the second pressure groove.

[0009] Preferably, the latch portion has a locking portion, and an inclined guide surface is provided below the locking portion.

[0010] Preferably, the outer wall of the base is provided with a clearance groove for the locking part to pass through, and the base is also provided with a clearance through hole for the locking part to pass through. The clearance groove and the clearance through hole are provided with anti-reverse grooves that abut against the locking part.

[0011] Preferably, the base is provided with a plurality of insertion holes for conductive plug terminals to pass through, and the insertion holes are provided with protruding insulating sleeves that cover the conductive plug terminals.

[0012] Preferably, the wiring part is provided with a plurality of equally spaced anti-slip grooves, the wiring part is fitted with a liftable voltage conductive plate, the voltage conductive plate is provided with fastening screws, the screw part abutting against the end face of the wiring part away from the anti-slip grooves.

[0013] Beneficial effects:

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention provides dual protection for the conductive plug terminals through a base and a protective shell, significantly improving their structural strength and heat resistance. When the conductive plug terminals experience abnormal temperature increases due to overload or short circuit, the base and protective shell preferentially absorb and disperse a large amount of heat. Even if local melting occurs, the large-area contact between the base and the upper and lower shells still ensures the stability of the overall structure. This design ensures that the upper and lower shells maintain sufficient mechanical strength under high-temperature conditions, ensuring that the conductive plug terminals can be safely removed from the socket and preventing live parts from remaining inside the socket. In addition, this structure fully considers the failure mechanism under high-temperature conditions and effectively reduces the safety risks that may occur during insertion and removal through multi-layer protection design, enhancing the reliability of the plug under extreme working conditions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a modular three-pole power plug with protective function according to this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of a modular three-pole power plug with protective function according to this utility model.

[0018] Figure 3 This is a side cross-sectional view of a modular three-pole power plug with protective function according to the present invention.

[0019] Figure 4 This is a schematic diagram of the modular bottom structure of a modular three-pole power plug with protective function according to this utility model.

[0020] Figure 5 This is an exploded view of a modular three-pole power plug with protective functions according to this utility model.

[0021] The correspondence between the labels and component names in the attached figures is as follows:

[0022] Reference numerals: 1. Lower housing; 2. Upper housing; 3. Base; 4. Conductive insert terminal; 5. Protective shell; 6. Chamber; 7. Fastening screw; 8. Wire hole; 11. First wire pressing groove; 12. Second wire pressing groove; 13. Wire pressing plate; 131. Protrusion; 132. Wire pressing part; 31. Relief groove; 32. Relief through hole; 33. Anti-reverse groove; 34. Insertion hole; 35. Insulating sleeve; 41. Wiring part; 42. Anti-slip groove; 43. Voltage conductive plate; 51. Locking part; 52. Locking part; 53. Guide surface. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0026] Reference example Figures 1 to 5 A modular three-pole power plug with protective function includes a lower housing 1 and an upper housing 2 covering the lower housing 1. A base 3 is provided between the lower housing 1 and the base 3 is provided with multiple conductive plug terminals 4. The conductive plug terminals 4 are provided with bent wiring portions 41. The base 3 is provided with a detachable protective shell 5. The protective shell 5 is provided with a cavity 6 for accommodating the wiring portions 41. Multiple locking portions 51 are provided below the cavity 6 and below the adjacent cavities 6, and are pressed against the base 3 to connect and fix the protective shell 5 to the base 3.

[0027] The base 3 and the protective shell 5 provide double protection for the conductive plug terminal 4, significantly improving its structural strength and heat resistance. When the conductive plug terminal 4 experiences an abnormal temperature rise due to overload or short circuit, the base 3 and the protective shell 5 preferentially absorb and disperse a large amount of heat. Even if local melting occurs, the large-area contact between the base 3 and the upper shell 2 and the lower shell 1 can still ensure the stability of the overall structure. This design ensures that the upper shell 2 and the lower shell 1 maintain sufficient mechanical strength under high temperature conditions, ensuring that the conductive plug terminal 4 can be safely pulled out of the socket, preventing live parts from remaining in the socket. In addition, this structure fully considers the failure mechanism under high temperature environment and effectively reduces the safety risks that may be caused during the insertion and removal process through multi-layer protection design, enhancing the reliability of the plug under extreme working conditions.

[0028] It is worth mentioning that the lower housing 1 is provided with fastening screws 7 and is threaded to the upper housing 2. The lower housing 1 and the upper housing 2 are provided with wire holes 8 for wires to enter.

[0029] It is worth mentioning that the lower housing 1 is provided with a first wire pressing groove 11 and a second wire pressing groove 12, which are located at the outlet of the wire hole 8. A wire pressing plate 13 is provided above the first wire pressing groove 11 and the second wire pressing groove 12. Several protrusions 131 are provided at both ends of the wire pressing plate 13. One of the protrusions 131 has wire pressing parts 132 that taper towards the middle on both sides, and is located between the first wire pressing groove 11 and the second wire pressing groove 12. The protrusion 131 is designed as a protruding triangular structure. When the wire passes through in sequence... When the wire hole 8, the first wire groove 11, and the second wire groove 12 are connected, the protrusion 131 is embedded in the surface of the wire to increase the friction between the wire and the wire hole 8. The contours of the first wire groove 11 and the second wire groove 12 fit the surface of the wire. When the wire is pulled, the wire clamp 132 effectively limits its left and right displacement and prevents excessive displacement. This structure improves the stability of the wire fixing through multi-point contact and geometric constraints, reduces the risk of poor contact or loosening caused by external force, and enhances the reliability of electrical connection.

[0030] It is worth mentioning that the latching part 51 is provided with a locking part 52, and an inclined guide surface 53 is provided below the locking part 52. When the locking part 52 initially enters the clearance groove 31 and the clearance through hole 32, the guide surface 53 first contacts the entrance edge, causing the latching part 51 to undergo elastic deformation and store energy until the locking part 52 is aligned with the anti-reverse groove 33. The latching part 51 releases the stored energy and is pressed into the anti-reverse groove 33 to complete the connection. The base 3, the protective shell 5, the conductive plug terminal 4 and the wiring terminal together constitute a conductive component. It adopts a modular structure design, which can be quickly replaced when the conductive plug terminal 4 is damaged, improving maintenance efficiency. This design helps to simplify the assembly process and reduce production complexity.

[0031] It is worth mentioning that the outer wall of the base 3 is provided with a clearance groove 31 for the locking part 51 to pass through, and the base 3 is also provided with a clearance through hole 32 for the locking part 51 to pass through. The clearance groove 31 and the clearance through hole 32 are provided with a backstop groove 33 that abuts against the locking part 52.

[0032] It is worth mentioning that the base 3 is provided with multiple sockets 34 for the conductive plug terminals 4 to pass through. The sockets 34 are provided with raised insulating sleeves 35 that cover the conductive plug terminals 4. The insulating sleeves 35 only cover part of the conductive area of ​​the conductive plug terminals 4 to prevent personnel from accidentally touching the conductive parts during insertion and removal. When the conductive plug terminals 4 are overloaded or short-circuited and the temperature rises abnormally, the insulating sleeves 35 can still prevent personnel from directly contacting the high-temperature parts and reduce the risk of burns. The upper shell 2, lower shell 1, base 3 and protective shell 5 can be made of high-temperature resistant materials such as polytetrafluoroethylene, polyphenylene sulfide, and polyetherketone to enhance the thermal stability and mechanical strength of the overall structure. This design takes into account both electrical isolation and thermal protection functions, and improves the safety of the plug under extreme working conditions.

[0033] It is worth mentioning that the wiring part 41 is provided with several equally spaced anti-slip grooves 42. The wiring part 41 is fitted with a liftable conductive voltage plate 43. The conductive voltage plate 43 is provided with a fastening screw 7. The screw part abuts against the end face of the wiring part 41 away from the anti-slip groove 42. The anti-slip groove 42 is designed to increase the friction with the exposed part of the wire, thereby improving the stability of the electrical connection. During the rotation of the fastening screw 7, the conductive voltage plate 43 is driven to move towards the anti-slip groove 42, forming a clamping force on the wire together with the wiring part 41. The conductive plug terminal 4 can be divided into ground terminal, L terminal or N terminal according to function to adapt to different circuit connection requirements, and the number is set to three. This structure effectively prevents the wire from loosening or poor contact through the synergistic effect of mechanical clamping and surface friction, ensuring the long-term reliability of the electrical connection.

[0034] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A modular three-pole power plug with a protection function, comprising a lower housing (1) and an upper housing (2) which is closed on the lower housing, characterized in that: A base (3) is provided between the lower housing (1) and the lower housing (1). The base (3) is provided with a plurality of conductive plug terminals (4). The conductive plug terminals (4) are provided with bent wiring portions (41). The base (3) is provided with a detachable protective shell (5). The protective shell (5) is provided with a chamber (6) for accommodating the wiring portions (41). A plurality of locking portions (51) are provided below the chamber (6) and below the adjacent chambers (6), and are fastened to the base (3) so that the protective shell (5) is connected and fixed to the base (3).

2. The modular three-pole power plug with protective function according to claim 1, characterized in that: The lower housing (1) is provided with fastening screws (7) and is threaded to the upper housing (2). The lower housing (1) and the upper housing (2) are provided with wire holes (8) for wires to enter.

3. The three-pole power plug with protection function and modularity according to claim 2, characterized in that: The lower housing (1) is provided with a first pressure groove (11) and a second pressure groove (12), and is located at the outlet of the wire hole (8). A pressure plate (13) is provided above the first pressure groove (11) and the second pressure groove (12). The pressure plate (13) has several protrusions (131) at both ends. One of the protrusions (131) has pressure parts (132) on both sides that taper towards the middle, and is located between the first pressure groove (11) and the second pressure groove (12).

4. The three-pole power plug with protection function and modularity according to claim 1, characterized in that: The latch (51) is provided with a locking part (52), and an inclined guide surface (53) is provided below the locking part (52).

5. The three-pole power plug with protection function and modularity according to claim 4, characterized in that: The outer wall of the base (3) is provided with a clearance groove (31) through which the latch (51) passes. The base (3) is also provided with a clearance through hole (32) through which the latch (51) passes. The clearance groove (31) and the clearance through hole (32) are provided with a backstop groove (33) that abuts against the locking part (52).

6. The modular three-prong plug with protective features according to claim 1, wherein: The base (3) is provided with a plurality of sockets (34) through which conductive plug terminals (4) pass, and the sockets (34) are provided with an insulating sleeve (35) that protrudes and covers the conductive plug terminals (4).

7. The modular three-pole power plug with protective function according to claim 1, characterized in that: The wiring part (41) is provided with a number of equally spaced anti-slip grooves (42), and the wiring part (41) is fitted with a liftable voltage conductive plate (43). The voltage conductive plate (43) is provided with fastening screws (7), and the screw part abuts against the end face of the wiring part (41) that is away from the anti-slip grooves (42).

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