Three-pin plug

Abstract

The utility model relates to the field of low-voltage electric appliances, in particular to a three-pin plug, a plug pin assembly comprises an earth pole plug pin, an L pole plug pin, an N pole plug pin and a plug pin support arranged in a plug pin shell, and the earth pole plug pin forms an earth pole plug pin body and an earth pole plug pin wiring part on the two faces of the plug pin support respectively; the L-pole plug pin forms an L-pole plug pin body and an L-pole plug pin wiring part on the two surfaces of the plug pin bracket respectively; the N-pole plug pin forms an N-pole plug pin body and an N-pole plug pin wiring part on the two surfaces of the plug pin support respectively, the L-pole plug pin body, the N-pole plug pin body and the earth-pole plug pin body are of a plate-shaped structure, are perpendicular to the plug pin support, extend in the third direction and penetrate through the three plug pin holes respectively to extend out of the plug pin shell, and the width direction of the earth-pole plug pin body is arranged in the transverse direction; the L-pole bolt body and the N-pole bolt body are positioned on the same side of the earth pole bolt body, namely on the same side of the thickness direction of the earth pole bolt body; and a better fixing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, and particularly to a three-pin plug. Background Art

[0002] With the improvement of people's requirements for electrical safety and the new requirements put forward by national standards for the safety level of electrical accessories, all-round improvement has been made in the safety performance of electrical accessories. At present, most of the three-pin plugs on the market are applied to 16A current circuits and have smaller volume and weight.

[0003] In the prior art, for the plug applied to a 32A current circuit, since it needs to pass a larger current, the volume of its internal parts increases accordingly, resulting in a larger weight of the 32A three-pin plug. After the 32A three-pin plug is connected to the wall socket, affected by gravity, it is not firmly fixed and is prone to looseness or detachment. Therefore, there is an urgent need for a three-pin socket and a corresponding three-pin plug with better fixing effect. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a three-pin plug with better fixing effect.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The present application provides a three-pin plug, including a plug pin housing and a plug pin assembly disposed in the plug pin housing. The plug pin housing includes three plug pin holes and a third through hole for a wire to pass through. The plug pin assembly includes a plug pin bracket, and a ground pin, an L-pin, and an N-pin that pass through the plug pin bracket and are integrally injection-molded with the plug pin bracket.

[0007] The ground pin forms a ground pin body and a ground pin wiring part on both sides of the plug pin bracket; the L-pin forms an L-pin body and an L-pin wiring part on both sides of the plug pin bracket; the N-pin forms an N-pin body and an N-pin wiring part on both sides of the plug pin bracket.

[0008] The L-pin body, the N-pin body, and the ground pin body are in a plate-like structure and perpendicular to the plug pin bracket, and all extend along the third direction and pass through the three plug pin holes respectively to extend outside the plug pin housing. The plug pin bracket blocks the three plug pin holes.

[0009] The width direction of the ground pin body is arranged along the first direction; in the second direction, the L-pin body and the N-pin body are on the same side of the ground pin body, that is, on the same side of the thickness direction of the ground pin body; the L-pin body and the N-pin body are inclined.

[0010] The first direction, the second direction, and the third direction are perpendicular to each other pairwise.

[0011] In a possible implementation manner, the included angle between the plane where the ground pin body is located and the plane where the L - pole pin body is located is 60°, the included angle between the plane where the ground pin body is located and the plane where the N - pole pin body is located is 60°, and the included angle between the plane where the L - pole pin body is located and the plane where the N - pole pin body is located is 60°.

[0012] In a possible implementation manner, the L - pole pin wiring part, the N - pole pin wiring part, and the ground pin wiring part are arranged side by side along the first direction and are located on the same straight line.

[0013] In a possible implementation manner, the plug - pin assembly further includes an insulating inner shell and at least three wiring terminals. The L - pole pin wiring part, the N - pole pin wiring part, and the ground pin wiring part are respectively connected to the three wiring terminals. The insulating inner shell is provided with at least three wiring terminal slots. The insulating inner shell covers the plug - pin bracket, and at least three wiring terminal slots respectively cover at least three wiring terminals and the corresponding L - pole pin wiring part, N - pole pin wiring part, and ground pin wiring part.

[0014] In a possible implementation manner, the plug - pin bracket includes at least one integrally - formed insulating sheath. The insulating sheath partially passes through the plug - pin hole and extends outside the plug - pin housing. At least one integrally - formed insulating sheath wraps a part of at least one of the ground pin, the L - pole pin, and the N - pole pin that extends outside the plug - pin housing.

[0015] In a possible implementation manner, a circle in the middle of at least one of the ground pin, the L - pole pin, and the N - pole pin is thinned to form a recessed area; uneven patterns are provided on two opposite sides of the recessed area; and a plastic - encapsulation process hole is provided inside or beside the recessed area.

[0016] In a possible implementation manner, the plug - pin housing includes a plug - pin base and a plug - pin face cover. The plug - pin face cover covers the plug - pin base along the third direction. The plug - pin base includes the three plug - pin holes. The plug - pin bracket is installed on the plug - pin base. The L - pole pin body, the N - pole pin body, and the ground pin body correspondingly pass through the three plug - pin holes. The axial direction of the third through - hole is arranged along the second direction.

[0017] In a possible implementation, the third via hole includes a first notch located on the plug base and a second notch located on the plug face cover, and the first notch and the second notch face each other; the three-pin plug further includes a wire pressing plate mounted on the plug base, and the wire pressing plate is close to the first notch; the wire pressing plate includes an arc-shaped third notch, and a clamping table for mating with the wire pressing plate is provided on the plug base.

[0018] In a possible implementation, the plug base includes a mounting post, the plug bracket includes a first through hole, and the insulating inner shell includes a second through hole, and the first through hole and the second through hole pass through the mounting post; the mounting post includes a third mounting hole, and the plug face cover includes a fourth mounting hole; the plug face cover includes a detachable cover plate on the front, and the detachable cover plate covers the fourth mounting hole.

[0019] In a possible implementation, the plug face cover includes a cover plate mounting groove, and the detachable cover plate is mounted in the cover plate mounting groove; a nut limiting groove is provided in the cover plate mounting groove, the fourth mounting hole is provided in the nut limiting groove, a nut is mounted in the nut limiting groove, a through hole of the nut corresponds to the fourth mounting hole, and at least one snap hole is included in a side wall of the cover plate mounting groove, and at least one snap protrusion for mating with the snap hole is provided on a side of the detachable cover plate.

[0020] In a possible implementation, the ground pin wiring part is located between the L-pin wiring part and the N-pin wiring part, and a distance between the L-pin wiring part and the ground pin wiring part is less than a distance between the N-pin wiring part and the ground pin wiring part;

[0021] A side of the plug face cover facing the insulating inner shell protrudes to form a limiting protrusion, and a limiting gap located between two wiring terminal grooves is provided on a side of the insulating inner shell away from the plug bracket, the limiting gap is correspondingly arranged between the N-pin wiring part and the ground pin wiring part, and the limiting protrusion of the plug face cover extends into the limiting gap to press and limit the insulating inner shell.

[0022] In a possible implementation, the plug includes a temperature control switch, the temperature control switch is connected in series with the L-pin, the insulating inner shell includes a wiring terminal groove and a flat plate part on one side of the wiring terminal groove, a side wall of the wiring terminal groove protrudes from the flat plate part, and the temperature control switch is mounted on the flat plate part of the insulating inner shell;

[0023] A first locking rail is provided on the flat plate portion, and the bottom of the temperature control switch adopts a second locking rail. The temperature control switch includes an incoming line end and an outgoing line end. The first locking rail and the second locking rail are slidably installed so that the incoming line end is connected to the L-pole plug, and the temperature control switch and the insulating inner shell are limited in the thickness direction of the insulating inner shell; the outgoing line end is connected with a temperature control switch terminal for connecting with the L-pole wire in the circuit.

[0024] In a possible implementation manner, at least one water guide groove is provided on the outer side wall of the insulating inner shell, configured to guide water to the plug base through the water guide groove.

[0025] Compared with the embodiment in the prior art where the ground-pole plug body is vertically arranged, the horizontal arrangement of the ground-pole plug body can increase the contact area between the ground-pole plug body and the socket in the gravity direction (perpendicular to the ground direction), increase the friction force, and when the plug sleeves of the wall socket clamp the ground-pole plug body from both sides, support the ground-pole plug body in the gravity direction, and the fixing effect after the plug and the socket are inserted is better; the plug assembly further includes a plug bracket, and the plug bracket, the ground-pole plug, the L-pole plug, and the N-pole plug are integrally injection-molded to prevent the ground-pole plug, the L-pole plug, and the N-pole plug from shaking relative to each other, and improve the structural stability of the ground-pole plug, the L-pole plug, the N-pole plug, and the plug bracket after installation; and it can be integrally installed and disassembled, and the plug bracket can also block the plug hole to improve the dust-proof performance.

[0026] In addition, the plug bracket includes at least one insulating sheath, and at least one of the insulating sheaths corresponds to at least one plug. The insulating sheath is integrally formed with the plug bracket and perpendicular to the plug surface of the plug bracket. The insulating sheath wraps a part of the plug body extending outside the plug housing, and the insulating sheath partially passes through the plug hole and extends outside the plug housing. The setting of the insulating sheath can improve the insulation performance of the L-pole plug and the N-pole plug. In addition, the integral molding of the insulating sheath and the plug bracket can improve the sealing performance between the plug body and the plug bracket, avoid generating gaps between the plug surface of the plug body and the plug bracket, accumulating dust, and affecting the normal use of the plug.

[0027] In addition, the plug assembly includes an insulating inner shell, and the insulating inner shell covers the wiring surface of the plug bracket, wraps the L-pole plug wiring part, the N-pole plug wiring part, the ground-pole plug wiring part and their corresponding terminals, and is encapsulated to form an inner shell module. The wire is located between the plug housing and the inner shell module, enhancing the insulation performance inside the plug, improving the safety of plug use, and being more concise inside the plug housing.

[0028] In addition, the L-pole pin wiring part, the N-pole pin wiring part, and the ground-pole pin wiring part are arranged side by side in the first direction and are located on the same straight line, which is convenient for wiring. Moreover, a limiting protrusion is formed by the side of the pin face cover facing the insulating inner shell, and a limiting gap located between two wiring terminal grooves is provided on the side of the insulating inner shell away from the pin bracket. The limiting protrusion serves both as positioning and increasing the insulation distance.

[0029] In addition, the plug includes a temperature control switch, and the temperature control switch is connected in series with the L-pole pin. In the embodiment of the present application, the insulating inner shell includes a wiring terminal groove and a flat part located on one side of the wiring terminal groove. The side wall of the wiring terminal groove protrudes from the flat part, and the temperature control switch is installed on the flat part of the insulating inner shell for temperature control of the plug to avoid safety problems caused by excessive temperature; a first locking rail is provided on the flat part of the insulating inner shell, and the bottom of the temperature control switch uses a second locking rail. During installation, the temperature control switch is driven to move along the first locking rail towards the L-pole pin direction, so that the incoming line end directly extends into the wiring terminal of the L-pole pin, saving wiring time, being convenient for wiring, and after installation, the temperature control switch and the insulating inner shell are limited in the thickness direction of the insulating inner shell, which is convenient for installation and fixation.

[0030] In addition, at least one water guide groove is provided on the outer side wall of the insulating inner shell. The water entering the plug flows through the water guide groove towards the pin base and will not flow into the inside of the insulating inner shell. Since the pin base and the pin bracket are separated by an insulating sheath and are in a sealed waterproof state, no safety problems will occur. Description of the Drawings

[0031] Figure 1 is a schematic structural diagram of the front of the three-pin plug of the present utility model;

[0032] Figure 2 is an exploded view of the three-pin plug of the present utility model;

[0033] Figure 3 is a schematic structural diagram of the back of the three-pin plug of the present utility model;

[0034] Figure 4 is a schematic structural diagram of the front of the pin face cover of the present utility model;

[0035] Figure 5 is a schematic structural diagram of the back of the pin face cover of the present utility model;

[0036] Figure 6 is a schematic structural diagram of the pin base of the present utility model;

[0037] Figure 7 is a schematic structural diagram of the front of the insulating inner shell of the present utility model;

[0038] Figure 8It is a schematic structural diagram of the back of the insulating inner shell of the present utility model;

[0039] Figure 9 It is a schematic structural diagram of the installation of the plug and the plug support of the present utility model;

[0040] Figure 10 It is a schematic structural diagram of the L - pole plug of the present utility model;

[0041] Figure 11 It is a schematic structural diagram of the N - pole plug of the present utility model;

[0042] Figure 12 It is a schematic structural diagram of the ground - pole plug of the present utility model;

[0043] Figure 13 It is a schematic structural diagram of the front of the plug support of the present utility model;

[0044] Figure 14 It is a schematic structural diagram of the back of the plug support of the present utility model;

[0045] Figure 15 It is a schematic structural diagram of the front of the wire - pressing plate of the present utility model;

[0046] Figure 16 It is a schematic structural diagram of the back of the wire - pressing plate of the present utility model;

[0047] Figure 17 It is a schematic structural diagram of the detachable cover plate of the present utility model;

[0048] Figure 18 It is a schematic structural diagram of another embodiment of the insulating inner shell of the present utility model;

[0049] The reference numerals in the drawings include:

[0050] Plug housing 1; Plug base 11; Clamping table 111; Plug face cover 12; Cover plate mounting groove 121; Nut limiting groove 122; Fourth mounting hole 123; Snap - through hole 124; Missing corner 125; Limiting protrusion 126; Limiting gap 127; Snap - buckle protrusion 128; Pressing rib 129; Third through - hole 13; First notch 131; Second notch 132; Mounting post 14; Detachable cover plate 15;

[0051] Plug assembly 2; Ground - pole plug 21; Ground - pole plug body 211; Ground - pole plug wiring part 212; First ground - pole connecting plate 213; First ground - pole bending plate 214;

[0052] L - pole plug 22; L - pole plug body 221; L - pole plug wiring part 222; First L - pole bending plate 223; Second L - pole bending plate 224; Third L - pole bending plate 225; Fourth L - pole bending plate 226;

[0053] N - pole pin 23; N - pole pin body 231; N - pole pin wiring part 232; first N - pole bending plate 233; second N - pole bending plate 234; third N - pole bending plate 235; fourth N - pole bending plate 236;

[0054] Pin support 24; insulating sheath 241; first through - hole 242;

[0055] Insulating inner shell 25; first through - hole 251; second through - hole 252; second through - hole 253; water - guiding groove 254; flat plate part 255; first locking guide rail 256;

[0056] Wire pressing plate 26; arc - shaped convex rib 261. Specific embodiments

[0057] The following embodiments given in conjunction with the drawings further illustrate the specific embodiments of the present utility model. The protection scope of the present utility model is not limited to the descriptions of the following embodiments.

[0058] As Figures 1 - 18 shown, the present application provides a three - pin plug, which includes a pin housing 1 and a pin assembly 2. Part of the pin assembly 2 is installed inside the pin housing 1, and part extends out of the pin housing 1 to connect with the corresponding socket. Preferably, the three - pin plug of this embodiment is applicable to a 32A current circuit.

[0059] Preferably, as Figure 2 , Figure 3 , Figure 13 and Figure 14 shown, the pin assembly 2 includes a ground - pole pin 21, an L - pole pin 22, an N - pole pin 23 and a pin support 24. The ground - pole pin 21, the L - pole pin 22 and the N - pole pin 23 are installed on the pin support 24. The pin support 24 fixes the ground - pole pin 21, the L - pole pin 22 and the N - pole pin 23 together for easy installation and disassembly. In the preferred embodiment of the present application, the pin support 24, the ground - pole pin 21, the L - pole pin 22 and the N - pole pin 23 are integrally injection - molded. That is, when injecting the pin support 24, the copper sheets serving as the ground - pole pin 21, the L - pole pin 22 and the N - pole pin 23 are put into the mold together for integral injection - molding, which can effectively prevent the relative shaking of the ground - pole pin 21, the L - pole pin 22 and the N - pole pin 23, and improve the structural stability after the installation of the ground - pole pin 21, the L - pole pin 22, the N - pole pin 23 and the pin support 24. Obviously, the pin support 24 is made of an insulating material, and the insulating material can be a plastic or other materials. Among them, Figure 13 and Figure 14 are respectively the structural schematic diagrams of the two sides of the pin support 24.

[0060] Further, as Figure 9As shown, the earth pin 21, L pin 22 and N pin 23 pass through the pin support 24, forming a pin body and a pin wiring part on both sides of the pin support 24 respectively. The side of the pin support 24 corresponding to the pin body is the pin surface, and the side corresponding to the pin wiring part is the wiring surface. The earth pin 21 includes an earth pin body 211 and an earth pin wiring part 212; the L pin 22 includes an L pin body 221 and an L pin wiring part 222; the N pin 23 includes an N pin body 231 and an N pin wiring part 232. The earth pin body 211, L pin body 221 and N pin body 231 are used to connect with the socket sleeves, and the earth pin wiring part 212, L pin wiring part 222 and N pin wiring part 232 are used to connect with the connecting wires.

[0061] Further, the length of the earth pin body 211 is greater than the length of the L pin body 221, which is beneficial for the earth pin 21 to connect with the earth socket sleeve in advance to complete the grounding protection. The length of the L pin body 221 is equal to the length of the N pin body 231.

[0062] Further, as Figure 2 and Figure 9 shown, the earth pin wiring part 212 is located between the L pin wiring part 222 and the N pin wiring part 232, which can prevent the L pin 22 and the N pin 23 from short-circuiting. The distance between the L pin wiring part 222 and the earth pin wiring part 212 is less than the distance between the N pin wiring part 232 and the earth pin wiring part 212, so that the earth pin wiring part 212 is closer to the L pin wiring part 222, which can enhance the safety of the three-pin plug.

[0063] Further, the L pin wiring part 222, N pin wiring part 232 and earth pin wiring part 212 are located on the same straight line, with a simple and beautiful structure, saving the internal space of the plug and being convenient for wiring.

[0064] Further, as Figure 2 shown, the L pin wiring part 222, N pin wiring part 232 and earth pin wiring part 212 are all equipped with wiring terminals for wiring. The wiring terminal includes a pressure screw and an inlet frame. In the preferred embodiment of the present application, the wiring terminal can be a screw-pushing type pressure structure or a lifting type pressure structure. That is, by rotating the pressure screw, the inlet frame moves towards the pressure screw, and the inner side surface of the inlet frame abuts against the pin wiring part to clamp the wire.

[0065] Further, the inner surface of the inlet frame is provided with shallow grooves or convex ribs to increase the connection friction and prevent the wire from slipping out of the inlet frame.

[0066] Further, as Figure 9As shown, the ground pin body 211 is horizontally arranged, that is, the width direction of the ground pin body 211 is arranged along the first direction. The L-pin body 221 and the N-pin body 231 are inclined. In the second direction, the L-pin body 221 and the N-pin body 231 are on the same side of the ground pin body 211, that is, on the same side of the thickness direction of the ground pin body 211. Preferably, the included angle between the plane where the ground pin body 211 is located and the plane where the L-pin body 221 is located is 60°, the included angle between the plane where the ground pin body 211 is located and the plane where the N-pin body 231 is located is 60°, and the included angle between the plane where the L-pin body 221 is located and the plane where the N-pin body 231 is located is 60°. Compared with the embodiment in the prior art where the ground pin body 211 is vertically arranged, the horizontal arrangement of the ground pin body 211 can increase the contact area between the ground pin 21 and the socket in the gravity direction (perpendicular to the ground direction), increase the friction force, and the fixing effect is better after the plug is inserted into the socket.

[0067] Furthermore, the L-pin body 221, the N-pin body 231, and the ground pin body 211 are in a plate-like structure and perpendicular to the pin support 24, and all extend along the third direction and pass through the three pin holes respectively to extend outside the pin housing 1. The pin support 24 shields the three pin holes.

[0068] The first direction, the second direction, and the third direction are perpendicular to each other in pairs.

[0069] Furthermore, as Figure 14 shown, the pin support 24 includes at least one insulating sheath 241. At least one insulating sheath 241 corresponds to at least one pin. The insulating sheath 241 is integrally formed with the pin support 24 and perpendicular to the pin surface of the pin support 24. The insulating sheath 241 wraps part of the pin body extending outside the pin housing 1. Preferably, it wraps half of the pin body. The insulating sheath 241 partially passes through the pin hole and extends outside the pin housing 1. The setting of the insulating sheath 241 can improve the insulation performance of the L-pin 22 and the N-pin 23. In addition, the integral formation of the insulating sheath 241 and the pin support 24 can improve the sealing performance between the pin body and the pin support 24, avoid generating gaps between the pin surface of the pin body and the pin support 24, accumulating dust, and affecting the normal use of the plug.

[0070] Furthermore, a circle in the middle of at least one pin is thinned to form a recessed area for installation with the insulating sheath 241, and concave and convex patterns are provided on two opposite sides of the recessed area to increase the friction between the insulating sheath 241 and the pin; a rubber coating process hole is provided inside or next to the recessed area, and after the pin and the pin bracket 24 are integrally injection-molded, plastic material is injected into the rubber coating process hole to fix the pin.

[0071] Of course, the insulating sheath 241 and the latch bracket 24 may not be integrally formed, and an insulating rubber covering the latch body may serve as the insulating sheath 241, which is also within the protection scope of the present application.

[0072] Furthermore, the L-pole plug body 221 and the N-pole plug body 231 are provided with the insulating sheath 241 .

[0073] Preferably, Figure 2 As shown, the plug assembly 2 includes an insulating inner shell 25, which covers the wiring surface of the plug bracket 24, wraps the L-pole plug wiring part 222, the N-pole plug wiring part 232, the ground-pole plug wiring part 212 and their corresponding wiring terminals, and encapsulates them to form an inner shell module. The wire is located between the plug shell and the inner shell module, which enhances the insulation performance inside the plug, improves the safety of the plug, and is more concise inside the plug shell.

[0074] Further, such as Figure 7 and Figure 8 As shown, the insulating inner shell 25 includes three terminal slots, and the terminal blocks of the L-pole plug connection part 222, the N-pole plug connection part 232 and the ground-pole plug connection part 212 are correspondingly installed in the three terminal slots, respectively covering at least three terminal blocks and the corresponding L-pole plug connection part 222, the N-pole plug connection part 232, and the ground-pole plug connection part 212; the bottom of the terminal slot includes a first through hole 251 for a wiring tool to pass through, and the wiring tool extends into the first through hole 251 to operate the crimping screw; as shown Figure 7 As shown, a second through hole 252 is provided on one side of the insulating inner shell 25, and the second through hole 252 corresponds to the opening of the wiring frame of the wiring terminal, and the wire can extend into the wiring frame through the second through hole 252. In the embodiment of the present application, the insulating inner shell 25 includes a wiring terminal slot and a flat plate portion 255 located on one side of the wiring terminal slot, and the side wall of the wiring terminal slot protrudes from the flat plate portion 255 to form a space for accommodating the wiring terminal; the distance between the L-pole plug wiring portion 222 and the ground-pole plug wiring portion 212 is smaller than the distance between the N-pole plug wiring portion 232 and the ground-pole plug wiring portion 212, and a limiting gap 127 is formed between the N-pole plug wiring portion 232 and the ground-pole plug wiring portion 212.

[0075] Preferably,Figure 10 As shown, the L-pole pin 22 includes an L-pole pin body 221, a first L-pole bending plate 223, a second L-pole bending plate 224, a third L-pole bending plate 225, and a fourth L-pole bending plate 226 that are sequentially bent and connected. The L-pole pin body 221 and the first L-pole bending plate 223 are located in the same plane and are connected at a right angle between the L-pole pin body 221 and the first L-pole bending plate 223. The second L-pole bending plate 224 is bent toward the ground pole pin 21 and the bending angle between the second L-pole bending plate 224 and the first L-pole bending plate 223 is an obtuse angle. The third L-pole bending plate 225 is bent toward the ground pole pin 21 and the third L-pole bending plate 225 is connected to the second L-pole bending plate 224 at a right angle. The third L-pole bending plate 225 extends in the direction away from the L-pole pin body 221. The fourth L-pole bending plate 226 is bent at a right angle to the third L-pole bending plate 225 in the direction close to the second L-pole bending plate 224. The plane where the fourth L-pole bending plate 226 is located is perpendicular to the plane where the second L-pole bending plate 224 is located.

[0076] Taking the direction perpendicular to the ground as the first direction and the direction in which the plug is inserted into the socket as the second direction, the L-pole pin 22 and the N-pole pin 23 are structurally symmetric along the plane where the first direction and the second direction are located.

[0077] As Figure 11 shown, the N-pole pin 23 includes an N-pole pin body 231, a first N-pole bending plate 233, a second N-pole bending plate 234, a third N-pole bending plate 235, and a fourth N-pole bending plate 236 that are sequentially bent and connected. The N-pole pin body 231 and the first N-pole bending plate 233 are located in the same plane and are connected at a right angle between the N-pole pin body 231 and the first N-pole bending plate 233. The second N-pole bending plate 234 is bent toward the ground pole pin 21 and the bending angle between the second N-pole bending plate 234 and the first N-pole bending plate 233 is an obtuse angle. The third N-pole bending plate 235 is bent toward the ground pole pin 21 and the third N-pole bending plate 235 is connected to the second N-pole bending plate 234 at a right angle. The third N-pole bending plate 235 extends in the direction away from the N-pole pin body 231. The fourth N-pole bending plate 236 is bent at a right angle to the third N-pole bending plate 235 in the direction close to the second N-pole bending plate 234. The plane where the fourth N-pole bending plate 236 is located is perpendicular to the plane where the second N-pole bending plate 234 is located;

[0078] As Figure 12As shown, the ground pin 21 includes a ground pin body 211, a first ground connection plate 213, and a first ground bending plate 214 that are connected in sequence. The first ground connection plate 213 is located at one end of the ground pin body 211 and is in the same plane as the ground pin body 211. The length of the first ground connection plate 213 is greater than the width of the ground pin body 211. The first ground bending plate 214 is located at one end in the length direction of the first ground connection plate 213 and is bent at a right angle to the first ground connection plate 213.

[0079] Further, as Figure 9 shown, the L-pole pin wiring part 222 includes a fourth L-pole bending plate 226 and a part of the third L-pole bending plate 225. The first L-pole bending plate 223, the second L-pole bending plate 224, a part of the third L-pole bending plate 225, and a part of the L-pole pin body 221 are injection-molded in the pin bracket 24;

[0080] The N-pole pin wiring part 232 includes a fourth N-pole bending plate 236 and a part of the third N-pole bending plate 235. The first N-pole bending plate 233, the second N-pole bending plate 234, a part of the third N-pole bending plate 235, and a part of the N-pole pin body 231 are injection-molded in the pin bracket 24;

[0081] The ground pin wiring part 212 includes the first ground bending plate 214 and a part of the first ground connection plate 213. A part of the first ground connection plate 213 and a part of the ground pin body 211 are injection-molded in the pin bracket 24.

[0082] Further, the inlet frame of the wiring terminal of the L-pole pin 22 is sleeved on the fourth L-pole bending plate 226, the inlet frame of the wiring terminal of the N-pole pin 23 is sleeved on the fourth N-pole bending plate 236, and the inlet frame of the wiring terminal of the ground pin 21 is sleeved on the first ground bending plate 214.

[0083] Preferably, as Figure 2 shown, the plug housing 1 includes a plug base 11 and a plug face cover 12. The plug face cover 12 is covered on the plug base 11 along the third direction. The plug base 11 includes three plug holes corresponding to the structures of the L-pole pin body 221, the N-pole pin body 231, and the ground pin body 211. The pin bracket 24 is installed on the plug base 11, and the L-pole pin body 221, the N-pole pin body 231, and the ground pin body 211 pass through the three plug holes correspondingly.

[0084] Further, as Figure 1 and Figure 2As shown, the plug housing 1 includes a third through-hole 13 for the wire to pass through. The third through-hole 13 is distributed on the plug base 11 and the plug face cover 12 to form opposite first notches 131 and second notches 132. The axial direction of the third through-hole 13 is arranged along the second direction, that is, perpendicular to the plane where the ground pin 21 is located.

[0085] Preferably, as Figure 2 shown, the plug further includes a wire pressing plate 26. The wire pressing plate 26 is connected to the plug base 11 and is located near the first notch 131, and is used to press the wire passing through the first notch 131 to prevent the wire from shaking.

[0086] Furthermore, as Figure 15 、 Figure 16 and Figure 6 shown, the wire pressing plate 26 includes an arc-shaped third notch. A clamping table 111 is provided on the plug base 11, and the wire pressing plate 26 is cooperatively installed with the clamping table 111 to clamp the wire. Both ends of the wire pressing plate 26 include two first fixing parts for screw fixation, and the first fixing parts can be first mounting holes; both ends of the clamping table 111 are provided with two second fixing parts for cooperative installation with the first fixing parts, and the second fixing parts can be second mounting holes or second mounting grooves for screw installation; the clamping table 111 includes an arc-shaped fourth notch located between the two second fixing parts, the third notch on the wire pressing plate 26 is opposite to the fourth notch, and the fourth notch corresponds to the position of the first notch 131 of the plug base 11.

[0087] Furthermore, as Figure 15 and Figure 16 shown, at least one arc-shaped rib 261 is included on the back and / or front of the wire pressing plate 26. The arc-shaped ribs 261 are arranged along the length direction of the pressing plate. The arc-shaped ribs 261 are used to enhance the structural strength of the wire pressing plate 26 and also enhance the elasticity of the wire pressing plate 26. In this embodiment, two arc-shaped ribs 261 are included on the front of the wire pressing plate 26 at intervals, and three arc-shaped ribs 261 are included on the back at intervals.

[0088] Preferably, as Figure 6 、 Figure 7 and Figure 13 shown, the plug bracket 24 includes a first through-hole 242, the insulating inner shell 25 includes a second through-hole 253, and the plug housing 1 includes a mounting post 14. The first through-hole 242 of the plug bracket 24 and the second through-hole 253 of the insulating inner shell 25 pass through the mounting post 14 and are limited within the plug housing 1. Furthermore, the first through-hole 242 is located in the middle of the plug bracket 24, the second through-hole 253 is located in the middle of the insulating inner shell 25, and the mounting post 14 is located in the middle of the plug housing 1.

[0089] Furthermore, as Figure 4 andFigure 6 As shown, the bolt base 11 includes the mounting post 14, the mounting post 14 includes a third mounting hole, the bolt face cover 12 includes a fourth mounting hole 123. In a preferred embodiment of the present application, the bolt face cover 12 includes a nut, and the screw sequentially passes through the third mounting hole and the fourth mounting hole 123 and is connected to the nut.

[0090] Further, as Figure 2 shown, the bolt face cover 12 includes a detachable cover plate 15 on the front side (the side opposite to the bolt base 11), and the detachable cover plate 15 covers the nut, playing a role in dust prevention, insulation and aesthetics.

[0091] Further, as Figure 4 and Figure 17 shown, the front side of the bolt face cover 12 includes a cover plate mounting groove 121, the detachable cover plate 15 is installed in the cover plate mounting groove 121; a nut limiting groove 122 is provided in the cover plate mounting groove 121, the fourth mounting hole 123 is provided in the nut limiting groove 122, the nut is installed in the nut limiting groove 122, and the through hole of the nut corresponds to the fourth mounting hole 123. A bead 129 is provided on one side of the detachable cover plate 15 facing the cover plate mounting groove 121, and the bead 129 presses against the nut to limit the nut in the nut limiting groove 122.

[0092] Further, as Figure 5 and Figure 17 shown, at least one snap protrusion 128 is provided on the side of the detachable cover plate 15, and at least one snap through hole 124 is provided in the cover plate mounting groove 121, and the snap protrusion 128 is correspondingly installed in the snap through hole 124.

[0093] Further, as Figure 5 and Figure 7 shown, a limiting protrusion 126 is formed by protruding on one side of the bolt face cover 12 facing the insulating inner shell 25. The limiting protrusion 126 is specifically located at the bottom of the cover plate mounting groove 121. The insulating inner shell 25 includes a limiting gap 127 between two terminal slots. The limiting gap 127 is correspondingly arranged between the N - pole bolt wiring part 232 and the ground - pole bolt wiring part 212. The limiting protrusion 126 of the bolt face cover 12 extends into the limiting gap 127. The bolt face cover 12 can press against and limit the insulating inner shell 25 through the limiting protrusion 126. The limiting protrusion 126 also plays a role in positioning and increasing the insulation distance.

[0094] Preferably, as Figure 4 shown, two inward - recessed cut - corners 125 are provided on both sides of the top of the bolt housing 1. When the plug is inserted into the socket, the two cut - corners 125 adapt to the position of the fingers, providing a more comfortable pressing experience.

[0095] Preferably, as Figure 18 shown, as the second embodiment of the present application, the plug further includes a temperature control switch (not shown in the figure). The temperature control switch is connected in series with the L-pole pin 22. In the embodiment of the present application, the insulating inner shell 25 includes a wiring terminal groove and a flat portion 255 located on one side of the wiring terminal groove. The side wall of the wiring terminal groove protrudes from the flat portion 255. The temperature control switch is installed on the flat portion 255 of the insulating inner shell 25 for controlling the temperature of the plug and avoiding safety problems caused by excessive temperature.

[0096] Furthermore, between the temperature control switch and the insulating inner shell 25, as Figure 18 shown, a locking slide rail structure is adopted. A first locking guide rail 256 is provided on the flat portion 255 of the insulating inner shell 25. The bottom of the temperature control switch adopts a second locking guide rail. After the first locking guide rail 256 and the second locking guide rail are slidably installed, the temperature control switch and the insulating inner shell 25 are limited in the thickness direction of the insulating inner shell 25, which is convenient for installation and fixation.

[0097] The temperature control switch includes an incoming line end and an outgoing line end. The incoming line end extends into the corresponding second through hole 252 of the L-pole pin 22 and is connected to the wiring terminal of the L-pole pin 22. The outgoing line end is connected with a temperature control switch wiring terminal, and the temperature control switch wiring terminal is used to connect with the L-pole wire in the circuit, which is convenient for wiring. Among them, the outgoing line end and the temperature control switch wiring terminal can be connected by riveting or welding.

[0098] During installation, drive the temperature control switch to move along the first locking guide rail 256 towards the second through hole 252, so that the incoming line end directly extends into the wiring terminal of the L-pole pin 22, saving wiring time and being convenient for wiring.

[0099] Furthermore, the temperature control switch includes two bimetal sheets. The two bimetal sheets are respectively connected to the incoming line end and the outgoing line end, and the two bimetal sheets are connected in a closed manner. When the temperature of the L-pole pin is overheated, the two bimetal sheets automatically jump open due to their own deformation and can cut off the power supply; when the temperature decreases, the two bimetal sheets deform and reset, automatically closing and connecting the power supply, avoiding accidents caused by overheating of the plug, playing a role in protecting the plug, and improving the service life of the plug.

[0100] Furthermore, the temperature control switch includes a thermistor. The two ends of the thermistor are respectively connected to the incoming line end and the outgoing line end. As the temperature gradually increases, the resistance value of the thermistor gradually decreases, and the connection or disconnection of the L-pole line can be controlled.

[0101] Furthermore, the series wire between the temperature control switch and the L-pole pin is sleeved with a heat shrinkable tube, and the heat shrinkable tube can play the roles of insulation, heat insulation and flame retardance.

[0102] Preferably, as the third embodiment of the present application, as Figure 18 shown, at least one water guide groove 254 is provided on the outer side wall of the insulating inner shell 25. The water falling on the insulating inner shell 25 flows to the plug base 11 through the water guide groove 254 and will not flow into the inside of the insulating inner shell 25. On the basis of the plug base 11 and the plug face cover 12, the socket of the present application further provides a plug support 24 and an insulating inner shell 25 to form an inner shell module. The plug support 24 is integrally formed with the plug, and the plug support 24 is also provided with an insulating sheath 241, and the waterproof and dustproof effect is very excellent. Further setting the water guide groove 254 enables the water to flow to the plug base 11 through the water guide groove 254 even if it enters the inside of the plug. Since the plug base 11 and the plug support 24 are separated by the insulating sheath 241 and are in a sealed and waterproof state, no safety problems will occur.

[0103] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when in use and commonly placed, and is only for the convenience of description, rather than indicating that the device or element referred to must have a specific orientation. Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating relative importance.

[0104] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. Three-pin plug, comprising a plug housing (1) and a plug assembly (2) arranged inside the plug housing (1), the plug housing (1) includes three plug holes and a third through hole (13) for a wire to pass through, and is characterized in that, The plug component (2) includes a plug bracket (24), and a ground pole plug (21), an L-pole plug (22), and an N-pole plug (23) that pass through the plug bracket (24) and are integrally injection-molded with the plug bracket (24). On both sides of the plug bracket (24), the ground pole plug (21) forms a ground pole plug body (211) and a ground pole plug wiring part (212) respectively; on both sides of the plug bracket (24), the L-pole plug (22) forms an L-pole plug body (221) and an L-pole plug wiring part (222) respectively; on both sides of the plug bracket (24), the N-pole plug (23) forms an N-pole plug body (231) and an N-pole plug wiring part (232) respectively. The L-pole plug body (221), the N-pole plug body (231), and the ground pole plug body (211) are in a plate-like structure and perpendicular to the plug bracket (24), and all extend along the third direction and pass through the three plug holes respectively to reach outside the plug housing (1). The plug bracket (24) shields the three plug holes. The width direction of the ground pole plug body (211) is arranged along the first direction; in the second direction, the L-pole plug body (221) and the N-pole plug body (231) are located on the same side of the ground pole plug body (211), that is, on the same side of the thickness direction of the ground pole plug body (211); the L-pole plug body (221) and the N-pole plug body (231) are inclined. The first direction, the second direction, and the third direction are perpendicular to each other in pairs.

2. The three-prong plug according to claim 1, characterized in that, The included angle between the plane where the ground pole plug body (211) is located and the plane where the L-pole plug body (221) is located is 60°; the included angle between the plane where the ground pole plug body (211) is located and the plane where the N-pole plug body (231) is located is 60°; the included angle between the plane where the L-pole plug body (221) is located and the plane where the N-pole plug body (231) is located is 60°.

3. The three-pin plug according to claim 1, characterized in that, The L-pole plug wiring part (222), the N-pole plug wiring part (232), and the ground pole plug wiring part (212) are arranged side by side along the first direction and are located on the same straight line.

4. The three-prong plug according to claim 3, wherein The plug component (2) further includes an insulating inner shell (25) and at least three wiring terminals. The L-pole plug wiring part (222), the N-pole plug wiring part (232), and the ground pole plug wiring part (212) are respectively connected to the three wiring terminals. The insulating inner shell (25) is provided with at least three wiring terminal slots. The insulating inner shell (25) covers the plug bracket (24), and at least three wiring terminal slots respectively cover at least three wiring terminals and the corresponding L-pole plug wiring part (222), N-pole plug wiring part (232), and ground pole plug wiring part (212).

5. The three-prong plug according to claim 1, characterized in that, The plug bracket (24) includes at least one integrally formed insulating sheath (241). The insulating sheath (241) partially passes through the plug hole and extends outside the plug housing (1). At least one of the insulating sheaths (241) integrally and wrapingly covers at least a part of the grounding pin (21), the L-pin (22), and the N-pin (23) that extends outside the plug housing (1).

6. The three-pin plug according to claim 5, characterized in that, A circle in the middle of at least one of the grounding pin (21), the L-pin (22), and the N-pin (23) is thinned to form a recessed area; uneven patterns are provided on two opposite sides of the recessed area; a plastic-encapsulation process hole is provided inside or beside the recessed area.

7. The three-prong plug according to claim 4, characterized in that, The plug housing (1) includes a plug base (11) and a plug face cover (12). The plug face cover (12) is covered on the plug base (11) along the third direction. The plug base (11) includes the three plug holes. The plug bracket (24) is installed on the plug base (11). The axial direction of the third through hole (13) is arranged along the second direction.

8. The three-prong plug according to claim 7, characterized in that, The third through hole (13) includes a first notch (131) located on the plug base (11) and a second notch (132) located on the plug face cover (12). The first notch (131) and the second notch (132) are opposite to each other. The three-prong plug further includes a wire pressing plate (26) installed on the plug base (11). The wire pressing plate (26) is close to the first notch (131). The wire pressing plate (26) includes an arc-shaped third notch. A clamping platform (111) for cooperating with the wire pressing plate (26) is provided on the plug base (11).

9. The three-prong plug according to claim 7, characterized in that, The plug base (11) includes a mounting post (14). The plug bracket (24) includes a first through hole (242). The insulating inner shell (25) includes a second through hole (253). The first through hole (242) and the second through hole (253) pass through the mounting post (14). The mounting post (14) includes a third mounting hole. The plug face cover (12) includes a fourth mounting hole (123). The plug face cover (12) includes a detachable cover plate (15) on the front. The detachable cover plate (15) covers the fourth mounting hole (123).

10. The three-pin plug according to claim 9, characterized in that, The plug face cover (12) includes a cover plate mounting groove (121). The detachable cover plate (15) is installed in the cover plate mounting groove (121). A nut limiting groove (122) is provided in the cover plate mounting groove (121). The fourth mounting hole (123) is provided in the nut limiting groove (122). A nut is installed in the nut limiting groove (122). The through hole of the nut corresponds to the fourth mounting hole (123). The side wall of the cover plate mounting groove (121) includes at least one snap-through hole (124). At least one snap projection (128) cooperating with the snap-through hole (124) is provided on the side of the detachable cover plate (15).

11. The three-prong plug according to claim 7, characterized in that, The grounding pin wiring part (212) is located between the L - pole pin wiring part (222) and the N - pole pin wiring part (232), and the distance between the L - pole pin wiring part (222) and the grounding pin wiring part (212) is less than the distance between the N - pole pin wiring part (232) and the grounding pin wiring part (212). One side of the pin face cover (12) facing the insulating inner shell (25) protrudes to form a limiting protrusion (126). A limiting gap (127) is provided on the side of the insulating inner shell (25) away from the pin bracket (24) and is located between two terminal slots. The limiting gap (127) is correspondingly arranged between the N - pole pin wiring part (232) and the grounding pin wiring part (212). The limiting protrusion (126) of the pin face cover (12) extends into the limiting gap (127) to press and limit the insulating inner shell (25).

12. The three-pin plug according to claim 4, wherein, The plug includes a temperature - control switch. The temperature - control switch is connected in series with the L - pole pin (22). The insulating inner shell (25) includes a terminal slot and a flat part (255) on one side of the terminal slot. The side wall of the terminal slot protrudes from the flat part (255). The temperature - control switch is installed on the flat part (255) of the insulating inner shell (25). A first locking rail (256) is provided on the flat part (255). The bottom of the temperature - control switch uses a second locking rail. The temperature - control switch includes an incoming line end and an outgoing line end. The first locking rail (256) and the second locking rail are slidably installed so that the incoming line end is connected to the L - pole pin (22), and the temperature - control switch and the insulating inner shell (25) are limited in the thickness direction of the insulating inner shell (25). The outgoing line end is connected to a temperature - control switch terminal for connecting to the L - pole wire in the circuit.

13. The three-pin plug according to claim 4, wherein At least one water - guiding groove (254) is provided on the outer side wall of the insulating inner shell (25), configured to guide water through the water - guiding groove (254) to the pin base (11).

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