A metal conductor, an electrical plug, and a round tube plug

Abstract

This invention provides a metal conductor, belonging to the field of electrical equipment technology, comprising a metal conductor body. The upper end of the metal conductor body has a first connecting portion for connecting a wire, and the lower end has a second connecting portion for connecting a socket. A limiting portion is provided on the upper part of the metal conductor body to limit downward movement of the metal conductor body along an insulating shell. An anti-disengagement portion is also provided on the metal conductor body to limit upward movement of the metal conductor body along the insulating shell. This invention also provides an electrical plug and a round tube plug using this metal conductor. The metal conductor provided by this invention, with its limiting portion and anti-disengagement portion, can respectively limit the upward or downward movement of the metal conductor body along the insulating shell, thereby achieving stable installation of the metal conductor relative to the insulating shell. The metal conductor installation is stable and reliable, ensuring plug quality and eliminating the risk of electric shock.

Description

Technical Field

[0001] This invention belongs to the field of electrical equipment technology, and more specifically, relates to a metal conductor and an electrical plug and a round tube plug using the metal conductor. Background Technology

[0002] An electrical plug is an electrical device designed to facilitate power connection and conduction. It is essentially a metal conductor encased in insulating plastic, with one end connected to a wire and the other end plugged into a socket to conduct electricity.

[0003] The metal conductor is installed inside the insulating shell from top to bottom. After welding or injection molding, the metal conductor will heat up, or when it is under load, the temperature of the metal conductor will rise. If the insertion or extraction force is too large, or if there are too many insertions and extractions, the metal conductor can easily become loose, causing the metal conductor to shift vertically and protrude from both ends of the insulating shell, resulting in poor plug quality. In addition, there is a risk of electric shock, which seriously affects safety. Summary of the Invention

[0004] The purpose of this invention is to provide a metal conductor to solve the problem that the metal conductor is prone to loosening, resulting in poor plug quality and the risk of electric shock.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a metal conductive sheet, comprising:

[0006] The metal conductor body has a first connecting part at the upper end for connecting wires and a second connecting part at the lower end for connecting sockets.

[0007] The upper part of the metal guide plate body is provided with a limiting part, which is used to limit the metal guide plate body to move downward along the insulating shell;

[0008] The metal guide plate body is provided with an anti-detachment part, which is used to limit the metal guide plate from moving upward along the insulating shell.

[0009] Furthermore, the limiting part is a connecting block that is inclined away from the metal guide plate body, and the first connecting part is located at the upper end of the connecting block.

[0010] Furthermore, the anti-detachment part is a wedge-shaped block disposed on one side of the metal guide plate body, and the thickness of the wedge-shaped block gradually decreases from top to bottom.

[0011] Furthermore, the first connecting part is a U-shaped fold plate.

[0012] Furthermore, the second connecting portion includes two oppositely arranged connecting plates, with a plugging space formed between the two connecting plates for connecting a socket.

[0013] The beneficial effects of the metal conductor provided by this invention are as follows: Compared with the prior art, the metal conductor of this invention connects to a wire through a first connecting part at one end and to a socket through a second connecting part at the other end, thereby achieving circuit conduction. The limiting part and anti-detachment part on the metal conductor body can respectively limit the upward or downward movement of the metal conductor along the insulating shell, thereby achieving stable installation of the metal conductor relative to the insulating shell. The metal conductor is installed stably and reliably, ensuring the quality of the plug and eliminating the risk of electric shock.

[0014] The present invention also provides an electrical plug, including two of the aforementioned metal conductors, and further including an insulating shell;

[0015] The two metal conductor bodies are perpendicular to each other and are spaced apart inside the insulating housing;

[0016] The insulating housing is provided with first mounting channels for mounting two metal guide plate bodies, and the upper end of the first mounting channel is provided with a first limiting groove for engaging the anti-detachment part.

[0017] The limiting part is engaged in the first limiting groove to limit the downward movement of the metal guide plate body along the insulating shell; the anti-detachment part abuts against the inner side wall of the first mounting channel to limit the upward movement of the metal guide plate body along the insulating shell.

[0018] The beneficial effects of the electrical plug provided by this invention are as follows: due to the use of the aforementioned metal conductor, the metal conductor is installed stably and reliably, ensuring the quality of the plug and eliminating the risk of electric shock. Its beneficial effects are consistent with those of the metal conductor and will not be elaborated further here.

[0019] The present invention also provides a round tube plug, including the aforementioned metal guide plate, and further including a metal conduit and an insulating sleeve;

[0020] The insulating sleeve is fitted onto the outside of the metal guide plate body, and the metal conduit is fitted into the metal conduit. The insulating sleeve is used to isolate the metal guide plate body and the metal conduit.

[0021] The metal conduit has a second mounting channel for mounting the metal guide plate body, and the upper end of the second mounting channel has a second limiting groove for engaging the anti-detachment part.

[0022] The limiting part is engaged in the second limiting groove to limit the downward movement of the metal guide plate body along the insulating sleeve; the anti-detachment part abuts against the inner side wall of the second mounting channel to limit the upward movement of the metal guide plate body along the insulating sleeve.

[0023] Furthermore, the upper end of the metal conduit is provided with a U-shaped fold for connecting the wire.

[0024] The beneficial effects of the round tube plug provided by this invention are as follows: due to the use of the aforementioned metal conductor, the metal conductor is installed stably and reliably, ensuring the quality of the plug and eliminating the risk of electric shock. Its beneficial effects are consistent with those of the metal conductor and will not be elaborated further here. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A perspective view of the metal conductor sheet provided in an embodiment of the present invention;

[0027] Figure 2 This is a side view of a metal guide sheet provided in one embodiment of the present invention;

[0028] Figure 3 A side view of a metal guide sheet provided in another embodiment of the present invention;

[0029] Figure 4 A three-dimensional electrical plug provided in an embodiment of the present invention Figure 1 ;

[0030] Figure 5 A three-dimensional electrical plug provided in an embodiment of the present invention Figure 2 ;

[0031] Figure 6 Another three-dimensional electrical plug provided in an embodiment of the present invention Figure 1 ;

[0032] Figure 7 Another three-dimensional electrical plug provided in an embodiment of the present invention Figure 2 ;

[0033] Figure 8 A perspective view of a circular tube plug provided in an embodiment of the present invention;

[0034] Figure 9 A perspective view of the metal conduit provided in an embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of the installation of the metal conductor body and the insulating shell provided in an embodiment of the present invention;

[0036] Figure 11 for Figure 10 A magnified view of point A in the middle.

[0037] In the figure: 100, metal guide plate body; 200, connecting block; 300, wedge block; 400, U-shaped folding plate; 500, connecting plate; 600, insulating shell; 601, first installation channel; 602, second installation channel; 603, groove; 700, metal conduit; 800, elastic sheet. Detailed Implementation

[0038] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0039] Please see Figure 1 The metal conductor provided by the present invention will now be described. The metal conductor includes a metal conductor body 100.

[0040] The upper end of the metal conductor body 100 is provided with a first connecting part for connecting wires, and the lower end is provided with a second connecting part for connecting sockets; the upper part of the metal conductor body 100 is provided with a limiting part for limiting the metal conductor body 100 to move downward along the insulating shell 600; the metal conductor body 100 is provided with an anti-detachment part for limiting the metal conductor to move upward along the insulating shell 600.

[0041] The metal conductor body 100 is made of copper or copper alloy, which has good electrical conductivity. The metal conductor body 100, the second connecting part, the limiting part, and the anti-detachment part are integrated into one structure. The metal conductor body 100 and the first connecting part at its upper end can be integrated into one structure, or the first connecting part can be connected to the upper end of the metal conductor body 100 by welding.

[0042] The metal conductor provided by this invention, compared with the prior art, connects a wire to the metal conductor body 100 via a first connecting portion at one end and a socket via a second connecting portion at the other end, thereby achieving circuit conduction. The limiting portion and anti-detachment portion on the metal conductor body 100 respectively limit the upward or downward movement of the metal conductor along the insulating housing 600, thus achieving stable installation of the metal conductor relative to the insulating housing 600. The stable and reliable installation of the metal conductor ensures the quality of the plug and eliminates the risk of electric shock.

[0043] As a specific embodiment of the metal conductive sheet provided by the present invention, please refer to Figure 1The limiting part is a connecting block 200 inclined away from the metal guide plate body 100, and the first connecting part is located at the upper end of the connecting block 200. In this embodiment, the limiting part is the connecting block 200, the width of the connecting block 200 is smaller than the width of the metal guide plate body 100, and the thickness is the same as that of the metal guide plate body 100. The connecting block 200 is located on one side of the upper part of the metal guide plate body 100, and the connecting block 200 is inclined away from the metal guide plate body 100, so that the connecting block 200 protrudes outward from the metal guide plate body 100, forming a stepped structure. When the metal guide plate body 100 is inserted into the corresponding insulating shell 600 from top to bottom, the stepped structure can limit the depth of the metal guide plate body 100 inserted into the insulating shell 600, thereby limiting the position of the metal guide plate installed downward along the insulating shell 600.

[0044] As a specific embodiment of the metal conductive sheet provided by the present invention, please refer to Figures 1 to 3 The anti-detachment part is a wedge-shaped block 300 located on one side of the metal guide plate body 100, and the thickness of the wedge-shaped block 300 gradually decreases from top to bottom. In this embodiment, the anti-detachment part is a wedge-shaped block 300 with a thickness that gradually decreases from top to bottom. During the process of the metal guide plate body 100 being inserted into the insulating housing 600 from top to bottom, the wedge-shaped block 300 overcomes the frictional force between itself and the inner wall of the insulating housing 600 and enters the insulating housing 600 together. After the metal guide plate body 100 is installed in place under the limitation of the limiting part, the part with the largest thickness at the upper end of the wedge-shaped block 300 abuts against the inner wall of the insulating housing 600, which can prevent the metal guide plate body 100 from moving upward.

[0045] Optionally, the anti-detachment part is an elastic sheet 800. The lower end of the elastic sheet 800 is integrally formed with the metal guide sheet body 100. The elastic sheet 800 is inclined from top to bottom outwards from the metal guide sheet body 100. A receiving space is provided at the corresponding position of the metal guide sheet body 100. This receiving space is used to accommodate the elastic sheet 800 after it rebounds under external force. During the process of the metal guide sheet body 100 being inserted into the insulating shell 600 from top to bottom, the elastic sheet 800 is pressed into the receiving space by the inner wall of the insulating shell 600. The elastic sheet 800 is subjected to its own elastic force, so that its upper end always rests against the inner wall of the insulating shell 600, which can prevent the metal guide sheet body 100 from moving upwards.

[0046] As a specific embodiment of the metal conductive sheet provided by the present invention, please refer to Figure 1The first connecting part is a U-shaped fold plate 400. In this embodiment, the U-shaped fold plate 400 is integrally formed with the metal guide plate body 100, or the U-shaped fold plate 400 is welded to the upper end of the metal guide plate body 100. The U-shaped fold plate 400 includes two free ends and an arc-shaped closed end. The U-shaped fold plate 400 is connected to the upper end of the metal guide plate body 100 through the arc-shaped closed end. When connecting wires, an external force can be applied to the two free ends of the U-shaped fold plate 400 to change the distance between the two free ends, making it convenient for wires of different diameters to be placed between the two free ends. After the wire enters between the two free ends, the two free ends are pressed inward at the same time to press the wire together, realizing a riveting connection. The U-shaped fold plate 400 enables the metal guide plate to easily connect wires of different diameters. The wires can also be directly welded between the U-shaped fold plates 400. The welded wires can still be pressed together by the two free ends of the U-shaped fold plate 400, which can further improve the strength of the connection structure.

[0047] As a specific embodiment of the metal conductive sheet provided by the present invention, please refer to Figure 1 The second connecting part includes two oppositely arranged connecting plates 500, forming a plugging space between the two connecting plates 500 for connecting a socket. In this embodiment, the two connecting plates 500 are symmetrically arranged, with their lower ends being free ends for insertion into the socket. The two connecting plates 500 have a certain degree of elasticity, facilitating clamping onto the connecting terminals inside the socket. The lower part of the opposite surfaces of the two connecting plates 500 is provided with a protruding structure, which ensures good contact between the metal guide plate body 100 and the socket during plugging.

[0048] Please see Figures 4 to 7 as well as Figure 10 The present invention also provides an electrical plug, comprising two metal contacts and an insulating housing 600.

[0049] Two metal guide plates 100 are perpendicular to each other and are spaced apart within the insulating housing 600. The insulating housing 600 has first mounting channels 601 spaced apart for mounting the two metal guide plates 100. The upper end of the first mounting channel 601 has a first limiting groove for engaging the anti-detachment part. The limiting part engages in the first limiting groove to limit the downward movement of the metal guide plate 100 along the insulating housing 600. The anti-detachment part abuts against the inner wall of the first mounting channel 601 to limit the upward movement of the metal guide plate 100 along the insulating housing 600.

[0050] The insulating housing 600 is a cylindrical or prismatic plastic component. The inner cavity of the insulating housing 600 has a dual-channel structure, containing two first mounting channels 601 for mounting two metal conductors. The position and size of the first limiting groove at the upper end of the first mounting channel 601 are aligned with the limiting portion structure on the corresponding metal conductor body 100. The opening directions of the two U-shaped folds 400 on the upper part of the two metal conductor bodies 100 are perpendicular to each other. When the two metal conductor bodies 100 are mounted on the insulating housing 600, the opening directions of their U-shaped folds 400 are ensured to face the same direction, thus facilitating the connection of the wires.

[0051] When the limiting part uses a wedge block 300, the width of the first mounting channel 601 is slightly smaller than the sum of the thickness of the metal guide plate body 100 and the upper thickness of the wedge block 300. Optionally, the difference between the two is 0.3mm to 0.8mm. The selection of this difference depends on the deformation of the material used for the insulating housing 600. When the deformation of the insulating housing 600 is large, a larger difference can be selected; when the deformation of the insulating housing 600 is small, a smaller difference can be selected.

[0052] When the limiting part uses an elastic sheet 800, the thickness of the elastic sheet 800 is no greater than the thickness of the metal guide plate body 100. After being pressed and rebounding, the elastic sheet 800 can be completely retracted into the receiving space of the metal guide plate body 100. At this time, the width of the first mounting channel 601 is the same as or slightly larger than the width of the metal guide plate body 100, with a difference of 0.2mm. When the metal guide plate body 100 is inserted into the first mounting channel 601 from top to bottom, the elastic sheet 800 is pressed by the inner wall of the first mounting channel 601 and retracts inward into the receiving space. The elastic sheet 800 is subjected to its own elastic force, so that its upper end always rests against the inner wall of the first mounting channel 601, which can prevent the metal guide plate body 100 from moving upward.

[0053] Please see Figure 11 Optionally, a groove 603 can be formed on the inner side wall of the first mounting channel 601. When the metal guide plate body 100 is inserted into the first mounting channel 601 and the limiting part is fully engaged with the first limiting groove, the position of the groove 603 is consistent with the position of the elastic piece 800 at this time. The elastic piece 800 rebounds into the groove 603 due to its own elasticity, which is used to restrict the upward movement of the metal guide plate body 100. This structure can more stably restrict the upward movement of the metal guide plate body 100.

[0054] The electrical plug provided by this invention, compared with the prior art, utilizes the aforementioned metal conductor. The metal conductor body 100 connects to a wire via a first connecting portion at one end and to a socket via a second connecting portion at the other end, thereby achieving circuit continuity. The limiting portion and anti-detachment portion on the metal conductor body 100 respectively limit the upward or downward movement of the metal conductor along the insulating shell 600, thus ensuring stable installation of the metal conductor relative to the insulating shell 600. The stable and reliable installation of the metal conductor guarantees the quality of the plug and eliminates the risk of electric shock.

[0055] Please see Figures 8 to 10 The present invention also provides a round tube plug, including a metal guide plate, a metal conduit 700 and an insulating sleeve.

[0056] An insulating sleeve is fitted over the outside of the metal guide plate body 100, and a metal conduit 700 is fitted over the inside of the metal conduit 700. The insulating sleeve is used to isolate the metal guide plate body 100 and the metal conduit 700. A second mounting channel 602 for mounting the metal guide plate body 100 is provided on the metal conduit 700. A second limiting groove for engaging the anti-detachment part is provided at the upper end of the second mounting channel 602. The limiting part engages in the second limiting groove to limit the downward movement of the metal guide plate body 100 along the insulating sleeve. The anti-detachment part abuts against the inner wall of the second mounting channel 602 to limit the upward movement of the metal guide plate body 100 along the insulating sleeve.

[0057] The metal conduit 700, like the metal conductor, is made of copper or a copper alloy and has good electrical conductivity. The metal conductor is located inside the insulating housing 600, and the metal conduit 700 is fitted onto the outside of the insulating housing 600.

[0058] The insulating housing 600 is a plastic part with a single channel structure. The single channel is a second mounting channel 602 for mounting metal guide plates. The position and size of the second limiting groove at the upper end of the second mounting channel 602 are opened with the limiting part structure on the corresponding metal guide plate body 100.

[0059] Similarly, the upper part of the metal conduit 700 is also provided with a limiting part, and the corresponding insulating shell 600 is also provided with a third limiting groove, which engages with the limiting part on the metal conduit 700 to limit the displacement of the metal conduit 700.

[0060] When the limiting part uses a wedge block 300, the width of the second mounting channel 602 is slightly less than the sum of the thickness of the metal guide plate body 100 and the upper thickness of the wedge block 300. Optionally, the difference between the two is 0.3mm to 0.8mm. The selection of this difference depends on the deformation of the material used for the insulating housing 600. When the deformation of the insulating housing 600 is large, a larger difference can be selected; when the deformation of the insulating housing 600 is small, a smaller difference can be selected.

[0061] When the limiting part uses an elastic sheet 800, the thickness of the elastic sheet 800 is no greater than the thickness of the metal guide plate body 100. After being pressed and rebounding, the elastic sheet 800 can be completely retracted into the receiving space of the metal guide plate body 100. At this time, the width of the second mounting channel 602 is the same as or slightly larger than the width of the metal guide plate body 100, with a difference of 0.2mm. When the metal guide plate body 100 is inserted into the second mounting channel 602 from top to bottom, the elastic sheet 800 is pressed by the inner wall of the second mounting channel 602 and retracts inward into the receiving space. The elastic sheet 800 is subjected to its own elastic force, so that its upper end always rests against the inner wall of the second mounting channel 602, which can prevent the metal guide plate body 100 from moving upward.

[0062] Please see Figure 11 Optionally, a groove 603 can be formed on the inner side wall of the second mounting channel 602. When the metal guide plate body 100 is inserted into the second mounting channel 602 and the limiting part is fully engaged with the second limiting groove, the position of the groove 603 is consistent with the position of the elastic piece 800 at this time. The elastic piece 800 rebounds into the groove 603 due to its own elasticity, which is used to restrict the upward movement of the metal guide plate body 100. This structure can more stably restrict the upward movement of the metal guide plate body 100.

[0063] The circular tube plug provided by this invention, compared with the prior art, utilizes the aforementioned metal guide plate. The metal guide plate body 100 connects to a wire through a first connecting portion at one end and to a socket through a second connecting portion at the other end, thereby achieving circuit continuity. The limiting portion and anti-detachment portion on the metal guide plate body 100 respectively limit the upward or downward movement of the metal guide plate along the insulating shell 600, thus achieving stable installation of the metal guide plate relative to the insulating shell 600. The stable and reliable installation of the metal guide plate ensures the quality of the plug and eliminates the risk of electric shock.

[0064] As a specific embodiment of the round tube plug provided by the present invention, please refer to Figures 8 to 9 The upper end of the metal conduit 700 is provided with a U-shaped folding plate 400 for connecting wires. In this embodiment, the structure of the U-shaped folding plate 400 enables welding and riveting of wires, and is suitable for connecting wires of different diameters. The openings of the metal guide plate and the U-shaped folding plate 400 of the metal conduit 700 face the same direction, thereby facilitating the connection of wires.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A metal conductive sheet, characterized in that, include: The metal conductor body has a first connecting part at the upper end for connecting wires and a second connecting part at the lower end for connecting sockets. The upper part of the metal guide plate body is provided with a limiting part, which is used to limit the metal guide plate body to move downward along the insulating shell; The metal guide plate body is provided with an anti-detachment part, which is used to limit the metal guide plate from moving upward along the insulating shell; The anti-detachment part and the limiting part are integrally formed on the metal guide plate body, which can respectively limit the metal guide plate to move upward or downward along the insulating shell, so as to complete the stable installation of the metal guide plate relative to the insulating shell. The limiting part is a connecting block inclined away from the metal guide plate body, and the first connecting part is located at the upper end of the connecting block; wherein, the limiting part is a connecting block, the width of the connecting block is smaller than the width of the metal guide plate body, and the thickness is the same as the metal guide plate body, the connecting block is located on one side of the upper part of the metal guide plate body, and the connecting block is inclined away from the metal guide plate body, so that the connecting block protrudes outward from the metal guide plate body, forming a stepped structure. When the metal guide plate body is inserted into the corresponding insulating shell from top to bottom, the stepped structure can limit the depth of the metal guide plate body inserted into the insulating shell.

2. The metal conductor sheet as described in claim 1, characterized in that, The anti-detachment part is a wedge-shaped block provided on one side of the metal guide plate body, and the thickness of the wedge-shaped block gradually decreases from top to bottom.

3. The metal conductor sheet as described in claim 1, characterized in that, The first connecting part is a U-shaped fold plate.

4. The metal conductor sheet as described in claim 1, characterized in that, The second connecting part includes two connecting plates arranged opposite each other, and a plugging space for connecting a socket is formed between the two connecting plates.

5. An electrical plug, characterized in that, It includes two metal conductors as described in any one of claims 1-4, and also includes an insulating housing; The two metal conductor bodies are perpendicular to each other and are spaced apart inside the insulating housing; The insulating housing is provided with first mounting channels for mounting two metal guide plate bodies respectively, and the upper end of the first mounting channel is provided with a first limiting groove for engaging the anti-detachment part. The limiting part is engaged in the first limiting groove to limit the downward movement of the metal guide plate body along the insulating shell; the anti-detachment part abuts against the inner wall of the first mounting channel to limit the upward movement of the metal guide plate body along the insulating shell. The anti-detachment part and the limiting part are integrally formed on the metal guide plate body, which can respectively limit the metal guide plate to move upward or downward along the insulating shell, so as to complete the stable installation of the metal guide plate relative to the insulating shell. The limiting part is a connecting block inclined away from the metal guide plate body, and the first connecting part is located at the upper end of the connecting block; wherein, the limiting part is a connecting block, the width of the connecting block is smaller than the width of the metal guide plate body, and the thickness is the same as the metal guide plate body, the connecting block is located on one side of the upper part of the metal guide plate body, and the connecting block is inclined away from the metal guide plate body, so that the connecting block protrudes outward from the metal guide plate body, forming a stepped structure. When the metal guide plate body is inserted into the corresponding insulating shell from top to bottom, the stepped structure can limit the depth of the metal guide plate body inserted into the insulating shell.

6. A round tube plug, characterized in that, The metal guide plate as described in any one of claims 1-4 is further comprising a metal conduit and an insulating sleeve; The insulating sleeve is fitted onto the outside of the metal guide plate body, and the metal conduit is fitted into the metal conduit. The insulating sleeve is used to isolate the metal guide plate body and the metal conduit. The metal conduit has a second mounting channel for mounting the metal guide plate body, and the upper end of the second mounting channel has a second limiting groove for engaging the anti-detachment part. The limiting part is engaged in the second limiting groove to limit the downward movement of the metal guide plate body along the insulating sleeve; the anti-detachment part abuts against the inner wall of the second mounting channel to limit the upward movement of the metal guide plate body along the insulating sleeve. The anti-detachment part and the limiting part are integrally formed on the metal guide plate body, which can respectively limit the metal guide plate to move upward or downward along the insulating shell, so as to complete the stable installation of the metal guide plate relative to the insulating shell. The limiting part is a connecting block inclined away from the metal guide plate body, and the first connecting part is located at the upper end of the connecting block; wherein, the limiting part is a connecting block, the width of the connecting block is smaller than the width of the metal guide plate body, and the thickness is the same as the metal guide plate body, the connecting block is located on one side of the upper part of the metal guide plate body, and the connecting block is inclined away from the metal guide plate body, so that the connecting block protrudes outward from the metal guide plate body, forming a stepped structure. When the metal guide plate body is inserted into the corresponding insulating shell from top to bottom, the stepped structure can limit the depth of the metal guide plate body inserted into the insulating shell.

7. The round tube plug as described in claim 6, characterized in that, The upper end of the metal conduit is provided with a U-shaped fold for connecting the wire.

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