Plug

Abstract

A plug comprises an L-pole plug pin and an N-pole plug pin, and the L-pole plug pin comprises an L-pole body, a first L-pole connecting arm, a second L-pole connecting arm and a third L-pole connecting arm which are sequentially connected in a bent mode. The N-pole plug pin comprises an N-pole body, a first N-pole connecting arm, a second N-pole connecting arm and a third N-pole connecting arm which are sequentially connected in a bent mode, the L-pole body and the N-pole body are perpendicular to the plug pin support, and the first L-pole connecting arm and the first N-pole connecting arm are arranged in the plug pin support in an injection molding mode and are parallel to the plug pin support; the fixing support comprises at least two insulation protection tables, wiring terminal containing cavities are formed in the insulation protection tables, the fixing support and the wiring terminals are arranged above the bolt support, the at least two wiring terminals are arranged in the at least two corresponding wiring terminal containing cavities, and the second L-pole connecting arm and the third L-pole connecting arm extend into one wiring terminal containing cavity. The contact area between the plug pins and the plug pin support can be increased, and it can be guaranteed that the plug pins cannot shake relatively.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a plug. Background Technology

[0002] As people's demands for electrical safety increase, and national standards have introduced new requirements for the safety levels of electrical accessories, a comprehensive improvement in the safety performance of electrical accessories is needed. Currently, most plugs on the market use separate pins, which are assembled individually. This can lead to wobbling of the pin prongs, resulting in unstable center distances or misalignment of the pins. Consequently, the plug does not insert smoothly into the socket, leading to a poor user experience. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integrally injection-molded pin assembly and a plug including the pin assembly.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This application provides a plug, including a housing with at least two pin holes and a cable hole. Inside the housing are a pin assembly, at least two terminals, and a fixing bracket. The pin assembly includes an integrally injection-molded pin bracket and at least two pins. The at least two pins extend from the housing through the at least two pin holes. The pin bracket covers the pin holes. The at least two pins include an L-pole pin and an N-pole pin. The L-pole pin includes an L-pole body, a first L-pole connecting arm, a second L-pole connecting arm, and a third L-pole connecting arm connected in sequence by bending. The N-pole pin includes an N-pole body, a first N-pole connecting arm, a second N-pole connecting arm, and a third N-pole connecting arm connected in sequence by bending. The L-pole body and the N-pole body are perpendicular to the pin bracket. The first L-pole connecting arm and the first N-pole connecting arm are injection-molded inside the pin bracket and parallel to the pin bracket.

[0006] The fixed bracket includes at least two insulating protective platforms, each forming a terminal placement cavity. The fixed bracket and the terminal are positioned above the pin bracket. At least two terminal are positioned within corresponding terminal placement cavities. A second L-pole connecting arm and a third L-pole connecting arm extend into one terminal placement cavity, with one terminal sleeved on the third L-pole connecting arm. A second N-pole connecting arm and a third N-pole connecting arm extend into another terminal placement cavity, with the other terminal sleeved on the third N-pole connecting arm.

[0007] In a possible implementation manner, the terminal is slidably installed in the terminal placement cavity. A first screw hole is provided on the terminal, with threads provided inside the first screw hole. A first fastening screw is rotatably arranged on the insulating base. A second screw hole is provided on the insulating base of the fixing bracket. After the first fastening screw passes through the second screw hole, it is threadedly connected to the first screw hole. Rotating the first fastening screw can drive the terminal to slide up and down in the terminal placement cavity.

[0008] In a possible implementation manner, the included angle between the L - pole body and the first L - pole connecting arm is 90°. The included angle between the first L - pole connecting arm and the second L - pole connecting arm is 90°. The included angle between the second L - pole connecting arm and the third L - pole connecting arm is 90°. The L - pole plug also includes an L - pole stop piece bent and connected to the third L - pole connecting arm, and the included angle between the third L - pole connecting arm and the L - pole stop piece is 90°. The included angle between the N - pole body and the first N - pole connecting arm is 90°. The included angle between the first N - pole connecting arm and the second N - pole connecting arm is 90°. The included angle between the second N - pole connecting arm and the third N - pole connecting arm is 90°. The N - pole plug also includes an N - pole stop piece bent and connected to the third N - pole connecting arm, and the included angle between the third N - pole connecting arm and the N - pole stop piece is 90°.

[0009] In a possible implementation manner, the plug - pin assembly further includes a ground - pole plug - pin. The ground - pole plug - pin includes a ground - pole body, a first ground - pole connecting arm, a second ground - pole connecting arm, and a ground - pole stop piece that are sequentially bent and connected. The included angle between the ground - pole body and the first ground - pole connecting arm is 90°. The included angle between the first ground - pole connecting arm and the second ground - pole connecting arm is 90°. The included angle between the second ground - pole connecting arm and the ground - pole stop piece is 90°.

[0010] In a possible implementation manner, at least one plug - pin is provided with an insulating sheath integrally formed with the plug - pin bracket, and a part of the insulating sheath passes through the plug - pin hole and extends outside the housing.

[0011] In a possible implementation manner, a circle in the middle of at least one plug - pin is thinned to form a recessed area for installing insulating rubber to form the insulating sheath. Concave - convex patterns are provided on the two opposite surfaces of the recessed area. Glue - encapsulation process holes are provided inside the recessed area or beside the recessed area.

[0012] In a possible implementation manner, the plug is a three - pin plug. At least two plug - pins include the L - pole plug - pin, the N - pole plug - pin, and the ground - pole plug - pin. The terminal of the L - pole plug - pin is sleeved on the second L - pole connecting arm and the third L - pole connecting arm. The terminal of the N - pole plug - pin is sleeved on the second N - pole connecting arm and the third N - pole connecting arm. The terminal of the ground - pole plug - pin is sleeved on the first ground - pole connecting arm and the second ground - pole connecting arm. The three terminals are arranged in a "pin" shape inside the housing.

[0013] In a possible implementation manner, the fixed bracket includes three insulating platforms. The wiring terminal placement cavities are formed inside the three insulating platforms respectively, and the three wiring terminals are respectively placed in the three wiring terminal placement cavities. In the middle of the fixed bracket, a first through hole is provided between the three insulating platforms.

[0014] In a possible implementation manner, the housing includes a face cover and a base. At least two plug holes are provided on the base. A hollow-structured first screw post is protrudingly provided in the middle of the base facing the direction of the face cover. The first through hole on the fixed bracket is sleeved on the first screw post. A second screw post is protrudingly provided on the face cover facing the direction of the base. A groove is formed inside the second screw post, and a thread is provided in the groove of the second screw post. The plug further includes a second fastening screw that mates with the thread. The second fastening screw passes through the first screw post in the direction from the base to the face cover and is inserted into the groove of the second screw post, so that the face cover and the base are fixed into one body.

[0015] In a possible implementation manner, three limiting ribs are formed on the side wall of the second screw post, and the three limiting ribs abut against the first through hole on the fixed bracket.

[0016] In a possible implementation manner, three annular ribs are protrudingly provided on one side of the face cover facing the base, and the three annular ribs abut against the three insulating platforms on the fixed bracket.

[0017] In a possible implementation manner, the plug-in bracket and the base are snap-connected. A plurality of anti-lock latches are provided on the base, and a plurality of latch grooves and / or latch holes and / or notches are provided on the plug-in bracket. The plug-in bracket and the base are fixed through the cooperation of the plurality of anti-lock latches and the plurality of latch grooves and / or latch holes and / or notches; alternatively, a plurality of latch grooves and / or latch holes and / or notches are provided on the base, and a plurality of anti-lock latches are provided on the plug-in bracket.

[0018] In a possible implementation manner, three anti-lock latches are provided on the base at intervals, and the three anti-lock latches are arranged in a 'pin' shape. Two latch holes and one notch are correspondingly provided on the plug-in bracket.

[0019] In a possible implementation manner, a wire pressing clamp is provided near the cable hole of the base. First screw holes are provided at both ends of the wire pressing clamp. Two second screw holes or screw grooves are provided on the base, and threads are provided inside the second screw holes or screw grooves. The screw passes through the first screw hole and mates with the second screw hole for fixation; an arc-shaped convex platform that cooperates with the wire pressing clamp is provided on the base.

[0020] In one possible implementation, the side of the pin bracket facing the pin hole is provided with a stop, the stop being located at the connection between at least two pins and the pin bracket, the stop being placed inside the pin hole to cover the gap between the pin and the pin hole.

[0021] Compared to existing technologies, this application features a pin and a pin bracket inside the housing, integrally injection molded. Each pin has a first L-pole connecting arm and a first N-pole connecting arm, injection molded inside the pin bracket and parallel to it. This increases the contact area between the pin and the pin bracket, preventing relative wobbling and ensuring precise center distance for smooth insertion into the socket, resulting in a better user experience. The two pins also have a third L-pole connecting arm and a third N-pole connecting arm extending into the terminal block, directly connecting to it. The fixing bracket and terminal block are positioned above the pin bracket, with the terminal block and pin covered by the terminal block placement cavity. This design not only reduces the number of parts and facilitates installation but also provides high insulation performance.

[0022] Furthermore, the terminal block of this application has an upward-pull-up terminal block structure. Rotating the first fastening screw can drive the terminal block to slide up and down in the terminal block placement cavity. This eliminates the need for the pin to deform and clamp the cable with the terminal block, ensuring that the pin structure will not deform and increasing the service life of the plug.

[0023] Furthermore, by setting the L-pole pin, N-pole pin, and ground pin into multiple bent structures with an included angle of 90° between adjacent bent structures, the contact area between the L-pole pin, N-pole pin, and ground pin and the pin bracket can be increased, thereby increasing the structural stability between the L-pole pin, N-pole pin, and ground pin and the pin bracket.

[0024] Furthermore, by providing insulating rubber on the pin, an insulating sleeve can be formed on the pin, which can effectively isolate electromagnetic interference, improve the plug's anti-interference capability, and ensure the normal operation of the equipment. Preferably, the insulating sleeve partially passes through the pin hole, and when the pin is not fully inserted into the socket, the portion of the insulating sleeve extending out of the pin hole can prevent electric shock. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the shell of this utility model;

[0026] Figure 2 This is an exploded view of the plug of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the L-pole plug of this utility model;

[0028] Figure 4 This is an unfolded view of the N-pole pin and L-pole pin of this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the N-pole plug of this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the ground electrode pin of this utility model;

[0031] Figure 7 This is an unfolded diagram of the ground electrode pin of this utility model;

[0032] Figure 8 This is a schematic diagram of the structure of the plug cover of this utility model;

[0033] Figure 9 This is a schematic diagram of the structure of the plug base of this utility model;

[0034] Figure 10 This is a schematic diagram of the plug of this utility model after the faceplate has been removed;

[0035] Figure 11 This is a side view of the plug assembly of this utility model;

[0036] The reference numerals in the attached drawings include: housing 101; cable hole 102; pin assembly 1; pin bracket 11; L pole pin 12; N pole pin 13; L pole body 121; first L pole connecting arm 122; second L pole connecting arm 123; third L pole connecting arm 124; L pole baffle 125; N pole body 131; first N pole connecting arm 132; second N pole connecting arm 133; third N pole connecting arm 134; N pole baffle 135; terminal block 2; fixing bracket 3; insulating guard 31; first screw hole 21; First fastening screw 34; Second screw hole 33; Ground electrode pin 14; Ground electrode body 141; First ground electrode connecting arm 142; Second ground electrode connecting arm 143; Ground electrode baffle 144; First through hole 32; Face cover 103; Base 104; First screw post 41; Second screw post 42; Second fastening screw 43; Limiting rib 44; Annular baffle 45; Locking buckle 51; Locking hole 52; Wire clamp 6; Second screw hole 61; Arc-shaped boss 62; Recessed area 71; Rubber coating process hole 72; Baffle 73. Detailed Implementation

[0037] The specific embodiments of this utility model are further described below with reference to the accompanying drawings. The scope of protection of this utility model is not limited to the description of the following embodiments.

[0038] like Figure 1 and Figure 2As shown, this application provides a plug including a housing 101, on which at least two pin holes and a cable hole 102 are provided. The cable hole 102 is used to connect an external cable. The plug also includes a pin assembly 1 disposed inside the housing 101. The pin assembly 1 includes a pin bracket 11 and at least two pins, which pass through at least two pin holes on the housing 101 respectively. The pin bracket 11 is made of an insulating material, such as plastic. The pin bracket 11 and the pins are integrally injection molded. The at least two pins on the pin assembly 1 are arranged perpendicularly to the pin bracket 11.

[0039] like Figure 2 , Figure 3 and Figure 5 As shown, at least two of the pins include a structurally symmetrical L-pole pin 12 and an N-pole pin 13. The L-pole pin 12 includes an L-pole body 121, a first L-pole connecting arm 122, a second L-pole connecting arm 123, and a third L-pole connecting arm 124 connected in sequence by bending. The N-pole pin 13 includes an N-pole body 131, a first N-pole connecting arm 132, a second N-pole connecting arm 133, and a third N-pole connecting arm 134 connected in sequence by bending. The first L-pole connecting arm 122 and the first N-pole connecting arm 132 are injection molded inside the pin bracket 11 and are parallel to the pin bracket 11. The thickness of the pin bracket 11 is increased to stabilize the L-pole pin 12 and the N-pole pin 13. At least two pins extend out of the housing 101 from at least two pin holes, and the pin bracket 11 covers the pin holes.

[0040] The plug also includes at least two terminals 2 and a fixing bracket 3 disposed inside the housing 101 corresponding to at least two pins. The terminals 2 and the fixing bracket 3 are disposed above the pin bracket 11. The fixing bracket 3 includes at least two insulating bases 31. The insulating bases 31 form terminals placement cavities. At least two terminals 2 are disposed in the corresponding terminals placement cavities. The second L-pole connecting arm 123 and the third L-pole connecting arm 124 extend into one of the terminals placement cavities. One of the terminals 2 is sleeved on the third L-pole connecting arm 124, and the other terminal 2 is sleeved on the third N-pole connecting arm 134.

[0041] in, Figure 3 This is a schematic diagram of the structure of the N-pole pin 13. Figure 5 This is a schematic diagram of the structure of the L-pole pin 12.

[0042] Compared to existing technologies, this application provides a pin and a pin bracket 11 inside the housing 101, and integrally injection molds the pin and the pin bracket 11. The two pins are respectively provided with a first L-pole connecting arm 122 and a first N-pole connecting arm 132, which are injection molded inside the pin bracket 11 and parallel to the pin bracket 11. This increases the contact area between the pin and the pin bracket 11, ensuring that the pins do not wobble relative to each other and that the center distance of the pins is accurate, allowing for smooth insertion into the socket and a better user experience. The two pins are also provided with a third L-pole connecting arm 124 and a third N-pole connecting arm 134 that extend into the terminal block and are directly connected to the terminal block 2. The fixing bracket 3 and the terminal block 2 are positioned above the pin bracket 11, and the terminal block 2 and the pin are covered by the terminal block placement cavity. This not only reduces the number of parts and makes installation convenient, but also provides high insulation performance.

[0043] Furthermore, this application uses a pull-up wiring structure, such as... Figure 2 As shown, the terminal block 2 is slidably installed in the terminal block placement cavity. The terminal block 2 is provided with a first screw hole 21, and the first screw hole 21 is provided with a thread. The first fastening screw 34 is rotatably mounted on the insulating guard 31. The insulating guard 31 of the fixing bracket 3 is provided with a second screw hole 33. The first fastening screw 34 can pass through the second screw hole 33 in the direction of plug insertion into the socket and then be threadedly connected to the first screw hole 21. Rotating the first fastening screw 34 can drive the terminal block 2 to slide up and down in the terminal block placement cavity.

[0044] The L-pole cable, N-pole cable, and ground cable are respectively inserted into the corresponding terminal 2. After rotating the first fastening screw 34, the terminal 2 can be pulled upward. The L-pole cable is clamped by the bottom wall of the terminal 2 and the third L-pole connecting arm 124, the N-pole cable is clamped by the bottom wall of the terminal 2 and the third N-pole connecting arm 134, and the ground cable is clamped by the bottom wall of the terminal 2 and the second ground cable connecting arm 143.

[0045] The terminal 2 of this application has an upward-pull-up wiring structure. Rotating the first fastening screw 34 can drive the terminal 2 to slide up and down in the terminal placement cavity. It does not require the pin to deform and clamp the cable with the terminal, which can ensure that the pin structure will not deform and increase the service life of the plug.

[0046] Preferred, such as Figures 3-5As shown, the L-pole pin 12 also includes an L-pole baffle 125, and the N-pole pin 13 also includes an N-pole baffle 135. The angle between the L-pole body 121 and the first L-pole connecting arm 122 is 90°, the angle between the first L-pole connecting arm 122 and the second L-pole connecting arm 123 is 90°, the angle between the second L-pole connecting arm 123 and the third L-pole connecting arm 124 is 90°, and the angle between the third L-pole connecting arm 124 and the L-pole baffle 125 is 90°. The angle between the N-pole body 131 and the first N-pole connecting arm 132 is 90°, the angle between the first N-pole connecting arm 132 and the second N-pole connecting arm 133 is 90°, the angle between the second N-pole connecting arm 133 and the third N-pole connecting arm 134 is 90°, and the angle between the third N-pole connecting arm 134 and the N-pole baffle 135 is 90°.

[0047] By setting the L-pole pin 12 and N-pole pin 13 into multiple bent structures with an included angle of 90° between adjacent bent structures, the contact area between the L-pole pin 12, N-pole pin 13 and the pin bracket 11 can be increased, thereby increasing the stability of the structure between the L-pole pin 12, N-pole pin 13 and the pin bracket 11.

[0048] Furthermore, such as Figure 4 As shown, after the multiple bent structures of the L-pole pin 12 are unfolded into a plane, the second L-pole connecting arm 123, the third L-pole connecting arm 124, and the L-pole baffle 125 are straight plate structures, with an angle of 60° between them and the L-pole body 121. Similarly, after the multiple bent structures of the N-pole pin 13 are unfolded into a plane, the second N-pole connecting arm 133, the third N-pole connecting arm 134, and the N-pole baffle 135 are straight plate structures, with an angle of 60° between them and the N-pole body 131. Figure 4 This is a schematic diagram of the structure after unfolding the multiple bent structures of L-pole pin 12 and N-pole pin 13.

[0049] Preferred, such as Figure 1 and Figure 2 As shown, in this embodiment, the plug is a three-prong plug. Of course, the structural design of this application can also be applied to other multi-prong plugs, such as two-prong plugs or four-prong plugs. In this application, the housing 101 includes three pin holes, and the pin assembly 1 includes three pins. The three pins pass through the three pin holes respectively. The three pins are the L-prong pin 12, the N-prong pin 13, and the ground pin 14.

[0050] Furthermore, such as Figure 6As shown, the earth pole pin 14 includes an earth pole body 141, a first earth pole connecting arm 142, a second earth pole connecting arm 143, and an earth pole stop piece 144 that are bent and connected in sequence; the included angle between the earth pole body 141 and the first earth pole connecting arm 142 is 90°, the included angle between the first earth pole connecting arm 142 and the second earth pole connecting arm 143 is 90°, and the included angle between the second earth pole connecting arm 143 and the earth pole stop piece 144 is 90°.

[0051] The earth pole pin 14 is set to have multiple bent structures, and the included angle between adjacent bent structures is 90°, which can increase the contact area between the earth pole pin 14 and the pin bracket 11 and enhance the structural stability between the earth pole pin 14 and the pin bracket 11.

[0052] Furthermore, as Figure 7 shown, after the bent and connected earth pole pin 14 is unfolded, the first earth pole connecting arm 142, the second earth pole connecting arm 143, and the earth pole stop piece 144 are connected into a flat plate structure and are parallel to the earth pole body 141.

[0053] Preferably, as Figure 2 shown, the plug further includes at least two wiring terminals 2 corresponding to at least two pins. The wiring terminals 2 are made of conductive metal materials, such as copper, iron, etc., and the wiring terminals 2 are arranged in a square frame structure inside the housing 101.

[0054] Furthermore, the wiring terminal 2 of the L-pole pin 12 is sleeved on the third L-pole connecting arm 124, and the L-pole stop piece 125 is in a barb structure to block and limit the wiring terminal 2; the wiring terminal 2 of the N-pole pin 13 is sleeved on the third N-pole connecting arm 134, and the N-pole stop piece 135 is in a barb structure to block and limit the wiring terminal 2; the wiring terminal 2 of the earth pole pin 14 is sleeved on the second earth pole connecting arm 143, and the earth pole stop piece 144 is in a barb structure to block and limit the wiring terminal 2. The three wiring terminals 2 are arranged in a "pin" shape inside the housing 101.

[0055] Preferably, as Figure 2 shown, the plug further includes a fixing bracket 3 arranged inside the housing 101. The fixing bracket 3 is made of insulating material, which can enhance the insulation protection performance of the plug. The fixing bracket 3 includes three insulating platforms 31. Wiring terminal placement cavities are formed inside the three insulating platforms 31. The three insulating platforms 31 respectively sleeve the three wiring terminals 2, and the three wiring terminals 2 are respectively placed in the three wiring terminal placement cavities. The fixing bracket 3 can limit and fix the wiring terminals 2; in the middle of the fixing bracket 3, a first through hole 32 is opened between the three insulating platforms 31.

[0056] Furthermore, the third L-pole connecting arm 124, the third N-pole connecting arm 134, and the second ground pole connecting arm 143 are located on the same limiting surface, and the distance between the limiting surface and the pin bracket 11 is preferably 13-15 mm.

[0057] Preferred, such as Figure 2 , Figure 8 and Figure 9 As shown, the housing 101 includes a faceplate 103 and a base 104. The faceplate 103 covers the base 104, and at least two pin holes are provided on the base 104. At least two pins of the pin assembly 1 pass through the pin holes on the base 104. A hollow first screw post 41 is provided with a protrusion in the middle of the base 104 facing the faceplate 103. The first through hole 32 on the fixing bracket 3 is fitted onto the first screw post 41. The first screw post 41 can limit the fixing bracket 3. After the first fastening screw 34 passes through the second screw hole 33 of the fixing bracket 3 in the direction of plug insertion into the socket and is installed on the terminal block 2, the fixing bracket 3 and the base 104 can be fixed together. Figure 8 This is a schematic diagram of the structure of the faceplate 103. Figure 9 This is a schematic diagram of the base 104.

[0058] Furthermore, such as Figure 2 , Figure 8 and Figure 9 As shown, the faceplate 103 has a second screw post 42 protruding from the base 104. The second screw post 42 has a groove inside. The second screw post 42 is opposite to the first screw post 41. The groove of the second screw post 42 is provided with threads. The plug also includes a second fastening screw 43. The thread of the second fastening screw 43 engages with the thread in the second screw post 42. The second fastening screw 43 passes through the first screw post 41 and inserts into the groove of the second screw post 42 along the direction of the base 104 facing the faceplate 103, so that the faceplate 103 and the base 104 are fixed together.

[0059] Furthermore, such as Figure 8 As shown, three limiting ribs 44 are formed on the side wall of the second screw post 42. The three limiting ribs 44 can abut against the first through hole 32 on the fixed bracket 3 and press and limit the fixed bracket 3 along the thickness direction of the plug.

[0060] Furthermore, such as Figure 8 As shown, the faceplate 103 facing the base 104 has three annular baffles 45 protruding. After the faceplate 103 and the base 104 are closed, the three annular baffles 45 abut against the three insulating guards 31 on the fixed bracket 3. The three annular baffles 45 can further limit and fix the fixed bracket 3 along the thickness direction of the plug.

[0061] Further, as shown in Figure 2 and Figure 9 shown, the latch bracket 11 and the base 104 are snap-connected. A plurality of locking latches 51 are provided on the base 104, and a plurality of latch grooves and / or latch holes 52 and / or notches are provided on the latch bracket 11. The latch bracket 11 and the base 104 are fixed through the cooperation of the plurality of locking latches 51 and the plurality of latch grooves and / or latch holes 52 and / or notches; alternatively, a plurality of latch grooves and / or latch holes 52 and / or notches are provided on the base 104, and a plurality of locking latches 51 are provided on the latch bracket 11.

[0062] Further, as shown in Figure 2 and Figure 9 shown, in the embodiment provided by the present utility model, three locking latches 51 are provided on the base 104 at intervals, and the three locking latches 51 are arranged in a "pin" shape. Two latch holes 52 and one notch are correspondingly provided on the latch bracket 11.

[0063] Further, as shown in Figure 2 and Figure 10 shown, the cable hole 102 of the housing 101 is circular and is composed of two semi-circles. The two semi-circles are respectively provided on the base 104 and the face cover 103.

[0064] Further, a wire pressing clamp 6 is provided near the cable hole 102 of the base 104. The wire pressing clamp 6 is fixed on the base 104, and the cable passing through the cable hole 102 into the plug is fixed on the base 104 by the wire pressing clamp 6. The wire pressing clamp 6 may be a long plate-like structure. First screw holes are provided at both ends of the wire pressing clamp 6, and two second screw holes 61 or screw grooves are provided on the base 104. The first screw holes and the second screw holes 61 correspond to each other respectively. Threads are provided inside the second screw holes 61 or screw grooves. After a screw passes through the first screw hole and is inserted into the second screw hole 61 and tightened, the wire pressing plate is fixed on the base 104.

[0065] Further, as shown in Figure 10 shown, an arc-shaped boss 62 is provided on the base 104. The arc-shaped boss 62 cooperates with the wire pressing clamp 6 to squeeze and fix the cable.

[0066] Preferably, as shown in Figures 3-5As shown, at least one pin has a thinned circumference in the middle to form a recessed area 71. Raised and recessed patterns, such as multiple diamond patterns, are provided on the opposite sides of the recessed area 71 to increase the friction between the insulating rubber and the pin. A rubber-coating process hole 72 is provided inside or beside the recessed area 71 to facilitate rubber coating and fixation. By providing insulating rubber on the pin, an insulating sleeve can be formed on the pin, effectively isolating electromagnetic interference, improving the plug's anti-interference capability, and ensuring the normal operation of the equipment. Preferably, the insulating sleeve extends through the pin hole to the outside of the housing 101. When the pin is not fully inserted into the socket, this portion of the insulating sleeve extending out of the pin hole can prevent electric shock.

[0067] Furthermore, such as Figures 2-5 As shown, in this embodiment, the middle portion of the L-pole body 121 of the L-pole pin 12 and the middle portion of the N-pole body 131 of the N-pole pin 13 are thinned to form the recessed area 71. An insulating rubber sheet is provided within the recessed area 71, and the insulating rubber sheet is integrally injection molded with the pin bracket 11. The length of the insulating rubber sheet extending from the pin bracket 11 towards the direction of plug insertion into the socket is 9.1–9.3 mm. Integrating the insulating rubber sheet and the pin bracket 11 into a single injection molded unit eliminates gaps between the pin and the plug bracket, preventing small objects from entering and enhancing insulation protection performance. Furthermore, as… Figure 2 and Figure 11 As shown, a stop 73 is provided on the side of the pin bracket 11 facing the pin hole. The stop 73 is formed by thickening around the connection between at least two pins and the pin bracket 11. The stop 73 is used to cover the gap between the pin and the pin hole. The pin bracket 11 is mounted on the base 104, and the pin passes through the pin hole. The stop 73 can abut against or be embedded in the pin hole, reducing the gap between the pin and the base 104 and improving the insulation performance.

[0068] Furthermore, the insulating rubber sheet may not be integrally injection molded with the pin bracket 11, but may be separately coated onto the pin to form an insulating sheath.

[0069] Preferred, such as Figure 1 As shown, the direction in which the cable enters the cable hole 102 is perpendicular to the thickness direction of the plug. This facilitates wiring during installation and connection to the socket during use.

[0070] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0071] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A plug, comprising a shell (101) provided with at least two plug pin holes and a cable hole (102), and provided inside with a plug pin assembly (1), at least two terminal pins (2) and a fixing support (3), the plug pin assembly (1) comprising an integrally injection molded plug pin support (11) and at least two plug pins, the at least two plug pins respectively extending out of the shell (101) from the at least two plug pin holes, the plug pin support (11) shielding the plug pin holes, characterized in that, At least two of the plugs include an L-pole plug (12) and an N-pole plug (13), the L-pole plug (12) includes an L-pole body (121), a first L-pole connecting arm (122), a second L-pole connecting arm (123) and a third L-pole connecting arm (124) connected in sequence, the N-pole plug (13) includes an N-pole body (131), a first N-pole connecting arm (132), a second N-pole connecting arm (133) and a third N-pole connecting arm (134) connected in sequence, the L-pole body (121) and the N-pole body (131) are perpendicular to the plug support (11), the first L-pole connecting arm (122) and the first N-pole connecting arm (132) are injection molded inside the plug support (11) and parallel to the plug support (11); The fixed support (3) includes at least two insulating guardrails (31), the insulating guardrails (31) form terminal placing cavities inside, the fixed support (3) and the terminal (2) are arranged above the plug support (11), at least two terminals (2) are arranged in the corresponding at least two terminal placing cavities, the second L-pole connecting arm (123) and the third L-pole connecting arm (124) extend into one terminal placing cavity and one terminal (2) is sleeved on the third L-pole connecting arm (124), the second N-pole connecting arm (133) and the third N-pole connecting arm (134) extend into another terminal placing cavity and another terminal (2) is sleeved on the third N-pole connecting arm (134).

2. The plug of claim 1, wherein, The terminal (2) is slidably arranged in the terminal placing cavity, the terminal (2) is provided with a first screw hole (21), the first screw hole (21) is provided with a thread, a first fastening screw (34) is rotationally arranged on the insulating guardrail (31), the insulating guardrail (31) of the fixed support (3) is provided with a second screw hole (33), the first fastening screw (34) is threadedly connected with the first screw hole (21) after passing through the second screw hole (33), and rotating the first fastening screw (34) can drive the terminal (2) to slide up and down in the terminal placing cavity.

3. The plug of claim 2, wherein, The included angle between the L-pole body (121) and the first L-pole connecting arm (122) is 90°, the included angle between the first L-pole connecting arm (122) and the second L-pole connecting arm (123) is 90°, the included angle between the second L-pole connecting arm (123) and the third L-pole connecting arm (124) is 90°. The L-pole plug (12) further includes an L-pole stop piece (125) bent and connected to the third L-pole connecting arm (124), and the included angle between the third L-pole connecting arm (124) and the L-pole stop piece (125) is 90°. The included angle between the N-pole body (131) and the first N-pole connecting arm (132) is 90°, the included angle between the first N-pole connecting arm (132) and the second N-pole connecting arm (133) is 90°, the included angle between the second N-pole connecting arm (133) and the third N-pole connecting arm (134) is 90°. The N-pole plug (13) further includes an N-pole stop piece (135) bent and connected to the third N-pole connecting arm (134), and the included angle between the third N-pole connecting arm (134) and the N-pole stop piece (135) is 90°.

4. The plug of claim 1, wherein, The plug assembly further includes a ground-pole plug (14), and the ground-pole plug (14) includes a ground-pole body (141), a first ground-pole connecting arm (142), a second ground-pole connecting arm (143) and a ground-pole stop piece (144) that are sequentially bent and connected. The included angle between the ground-pole body (141) and the first ground-pole connecting arm (142) is 90°, the included angle between the first ground-pole connecting arm (142) and the second ground-pole connecting arm (143) is 90°, and the included angle between the second ground-pole connecting arm (143) and the ground-pole stop piece (144) is 90°.

5. The plug of claim 1, wherein, At least one plug is provided with an insulating sheath integrally formed with the plug bracket (11), and a part of the insulating sheath extends outside the housing (101) through the plug hole.

6. The plug of claim 5, wherein, A circle in the middle of at least one plug is thinned to form a recessed area (71) for installing an insulating rubber sheet to form the insulating sheath. Concave-convex patterns are provided on two opposite sides of the recessed area (71). A rubber coating process hole (72) is provided inside the recessed area (71) or beside the recessed area (71).

7. The plug of claim 1, wherein, The plug is a three-pin plug. At least two plugs include the L-pole plug (12), the N-pole plug (13) and the ground-pole plug (14). The wiring terminal (2) of the L-pole plug (12) is sleeved on the second L-pole connecting arm (123) and the third L-pole connecting arm (124). The wiring terminal (2) of the N-pole plug (13) is sleeved on the second N-pole connecting arm (133) and the third N-pole connecting arm (134). The wiring terminal (2) of the ground-pole plug (14) is sleeved on the first ground-pole connecting arm (142) and the second ground-pole connecting arm (143). The three wiring terminals (2) are arranged in a "pin" shape inside the housing (101).

8. The plug of claim 1, wherein, The fixed bracket (3) includes three insulating platforms (31). The placement cavities for the terminal blocks are formed inside the three insulating platforms (31). The three terminal blocks (2) are respectively placed in the three placement cavities for the terminal blocks. In the middle of the fixed bracket (3), a first through hole (32) is provided between the three insulating platforms (31).

9. The plug of claim 8, wherein, The housing (101) includes a face cover (103) and a base (104). At least two pin holes are provided on the base (104). In the middle of the base (104), a first screw post (41) with a hollow structure protrudes towards the face cover (103). The first through hole (32) on the fixed bracket (3) is sleeved on the first screw post (41). The face cover (103) protrudes towards the base (104) to form a second screw post (42). A groove is formed inside the second screw post (42). Threads are provided in the groove of the second screw post (42). The plug further includes a second fastening screw (43) that mates with the threads. The second fastening screw (43) passes through the first screw post (41) along the direction from the base (104) towards the face cover (103) and is inserted into the groove of the second screw post (42), fixing the face cover (103) and the base (104) into one body.

10. The plug of claim 9, wherein, Three limiting ribs (44) are formed on the side wall of the second screw post (42). The three limiting ribs (44) abut against the first through hole (32) on the fixed bracket (3).

11. The plug of claim 9, wherein, On the side of the face cover (103) facing the base (104), three annular ribs (45) protrude. The three annular ribs (45) abut against the three insulating platforms (31) on the fixed bracket (3).

12. The plug of claim 9, wherein, The pin bracket (11) and the base (104) are snap-connected. A number of anti-lock latches (51) are provided on the base (104). A number of latch grooves and / or latch holes (52) and / or gaps are provided on the pin bracket (11). The pin bracket (11) and the base (104) are fixed through the cooperation of a number of anti-lock latches (51) and a number of latch grooves and / or latch holes (52) and / or gaps; alternatively, a number of latch grooves and / or latch holes (52) and / or gaps are provided on the base (104), and a number of anti-lock latches (51) are provided on the pin bracket (11).

13. The plug of claim 12, wherein, Three anti-lock latches (51) are spaced apart on the base (104). The three anti-lock latches (51) are arranged in a "pin" shape. Two latch holes (52) and one gap are correspondingly provided on the pin bracket (11).

14. The plug of claim 9, wherein, A wire clamp (6) is provided near the cable hole (102) of the base (104). First screw holes are provided at both ends of the wire clamp (6). Two second screw holes (61) or screw grooves are provided on the base (104). Threads are provided inside the second screw holes (61) or screw grooves. The screw passes through the first screw hole and mates with the second screw hole (61) for fixation; an arc-shaped boss (62) that cooperates with the wire clamp (6) is provided on the base (104).

15. The plug of claim 1, wherein, The one of the latch bracket (11) facing the latch hole is provided with a stop table (73), the stop table (73) is located at the connection of at least two latches and the latch bracket (11), the stop table (73) is placed in the latch hole, for shielding the gap between the latch and the latch hole.

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