KR102654073B1 - Plug-Socket Assembly - Google Patents

Abstract

Disclosed are plugs, sockets and their assemblies. This plug is connected to the end of the power line to be connected to or disconnected from a socket to which power is supplied, and is formed in a cylindrical plug housing, cylindrical along the central axis of the plug housing, and a part of one end of the plug housing protruding to the outside. 1 electrode, formed in an annular shape surrounding the first electrode, and a second electrode, the outer surface of which is exposed to the outside along the side of the plug housing, is formed in an annular shape surrounding the first electrode on the inside of the plug housing more than the second electrode. , a third electrode whose outer surface is exposed to the outside along the side of the plug housing, and a first, second, and third extension portions connecting each of the first to third electrodes and the wiring embedded in the power line. Includes. In addition, the socket into which the plug of the present invention is inserted includes a cylindrical socket housing with a hollow into which the plug is inserted, a first conductive terminal having a disk-shaped first contact portion formed on the end surface of the hollow, and a socket surrounding the inner surface of the hollow. A second conductive terminal including a curved plate-shaped second contact portion, and a third conductive terminal including a curved plate-shaped third contact portion formed to be spaced apart from the second conductive terminal and surrounding the hollow inner surface portion. Includes.

Description

Plug-Socket Assembly {Plug-Socket Assembly}

The present invention relates to plug-socket assemblies.

Sockets and plugs are devices for wiring connection that are usually connected to each other. A power line through which power is supplied is connected to this socket, and a pair of electrode grooves are provided into which a pair of electrodes of the plug are inserted. Additionally, the plug is provided on the power line of an electric device, so that it is inserted into a pair of electrode grooves in the socket and is provided with a pair of electrodes that are connected to the power line.

Such sockets and plugs are connected to each other to supply power to the electric device when using it, and are separated from each other to cut off the supply of power after the use of the electric device is completed.

The socket and the plug are connected by inserting a pair of electrodes of the pin-shaped plug into a pair of electrode grooves of the socket, and the pair of electrodes is separated by pulling out the pair of electrode grooves, the pin. Since the shaped terminal must be provided on one side, there is a limit to reducing the size of the plug. Additionally, since two electrodes must be pulled out at once, not only is a considerable amount of force required, but if either electrode is inserted incorrectly, it may be separated at an undesirable time. Therefore, there is a need for a plug-socket that reduces the volume, is easy to insert and remove, and has improved fastening force.
Prior art documents related to the present invention include US Patent Publication No. 9,246,290 (January 26, 2016).

The present invention is intended to solve the above-mentioned problems, and the purpose of the present invention is to provide a plug, a socket, and an assembly thereof that have a simple manufacturing method and device structure, reduce the size of the plug and socket, and are easy to separate and fasten. there is.

In addition, the purpose of the present invention is to provide a plug, socket, and assembly thereof that can prevent safety accidents such as short circuit and electric shock by preventing foreign substances from penetrating into the electrode by improving sealing and airtightness.

However, the technical challenges that this embodiment aims to achieve are not limited to the technical challenges described above, and there may be other technical challenges.

According to an embodiment of the present invention for achieving the above-described object, a plug connected to the end of a power line to be connected to or disconnected from a socket to which power is supplied includes a cylindrical plug housing; a first electrode formed in a cylindrical shape along the central axis of the plug housing, with a portion protruding outward from one end of the plug housing; a second electrode formed in an annular shape surrounding the first electrode and having an outer surface exposed to the outside along a side of the plug housing; a third electrode formed in an annular shape surrounding the first electrode inside the plug housing more than the second electrode, and having an outer surface exposed to the outside along a side of the plug housing; and a first extension part, a second extension part, and a third extension part connecting each of the first to third electrodes and a wire embedded in the power line.

In addition, a socket that supplies power according to an embodiment of the present invention includes a cylindrical socket housing with a hollow hole into which a plug is inserted; a first conductive terminal having a disk-shaped first contact portion formed on an end surface of the hollow; a second conductive terminal including a curved plate-shaped second contact portion surrounding the hollow inner surface portion; and a third conductive terminal formed to be spaced apart from the second conductive terminal and including a curved plate-shaped third contact portion surrounding the hollow inner surface portion.

Additionally, in a plug-socket assembly including a socket according to an embodiment of the present invention and a plug connected to an end of a power line to be connected to or disconnected from the socket, the plug includes: a cylindrical plug housing; a first electrode formed in a cylindrical shape along the central axis of the plug housing, with a portion protruding outward from one end of the plug housing; a second electrode formed in an annular shape surrounding the first electrode and having an outer surface exposed to the outside along a side of the plug housing; a third electrode formed in an annular shape surrounding the first electrode inside the plug housing more than the second electrode, and having an outer surface exposed to the outside along a side of the plug housing; and a plug fastening device including a hollow part that fits into the plug housing, a first thread formed on an outer surface, and a cover part that covers one end of the housing of the socket, wherein the socket is a cylinder having a hollow into which the plug is inserted. shaped socket housing; a first conductive terminal contacting the first electrode and having a disk-shaped first contact portion formed on an end surface of the hollow; a second conductive terminal that contacts the second electrode and includes a curved plate-shaped second contact portion surrounding the hollow inner surface portion; a third conductive terminal contacting the third electrode, formed to be spaced apart from the second conductive terminal, and including a curved plate-shaped third contact portion surrounding the hollow inner surface portion; and a second screw thread formed on the inner side of the hollow. The first screw thread and the second screw thread are assembled by engaging each other.

Various embodiments of the present invention can reduce the volume of the plug and socket by placing electrodes on the side surfaces of the plug, and by forming the plug into a cylindrical shape, the plug can be coupled to the socket in various directions, thereby improving space utilization and wires. It can be easily organized.

Additionally, various embodiments of the present invention can produce the effect of improving efficiency while electrically safely arranging each electrode inside the plug and socket.

1 shows a plug and socket according to one embodiment of the invention.
Figure 2a is a diagram showing the internal structure of a plug according to an embodiment of the present invention, Figure 2b is a cross-sectional view of the plug according to an embodiment of the present invention, and Figure 2c is a second diagram according to an embodiment of the present invention. This is a diagram showing the electrodes separated.
FIG. 3A is a diagram showing an example of a plug of the present invention provided with a fastening device, and FIG. 3B is a diagram showing a side view and a front view of the fastening device of the present invention.
FIG. 4A is a diagram for explaining a socket according to an embodiment of the present invention, FIG. 4B is a cross-sectional view of the socket according to an embodiment of the present invention, and FIG. 4C is an inner structure of the socket according to an embodiment of the present invention. This is a drawing to explain.
Figure 5 is a diagram showing the plug-socket assembly of the present invention.
Figure 6 is a diagram showing a plug according to another embodiment of the present invention.
FIG. 7 is a view showing the plug of FIG. 6 from another direction.
Figure 8 is a diagram showing an adapter device according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail using the attached drawings. In describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In addition, numbers (eg, first, second, etc.) used in the description of this specification are merely identifiers to distinguish one component from another component.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, the same reference numerals will be used for the same components in the drawings, and duplicate descriptions of the same components will be omitted.

Figure 1 shows a plug 1 and a socket 2 into which the plug 1 can be inserted according to an embodiment of the present invention.

The plug 1 of the present invention performs the function of supplying power to an electronic device connected to the power line by being connected to the end of a power line (not shown) to be connected to or disconnected from the socket 2 through which power is supplied. Hereinafter, the shape and internal structure of the plug 1 and the socket 2 to which the plug 1 is connected or separated according to an embodiment of the present invention will be described in detail.

Referring to FIG. 1, the plug 1 according to an embodiment of the present invention may include a plug housing 11 and first to third electrodes 12, 13, and 14 accommodated in the plug housing 11. . The plug housing 11 is molded from an insulating synthetic resin, etc., and may have one end connected to a power line (not shown), and the other end may be inserted into the socket 2 to expose electrodes for electrical connection. That is, the plug housing 11 may include an opening at the other end through which at least a portion of the first to third electrodes 12, 13, and 14 are exposed to the outside. At this time, the opening through which the first electrode 12 is exposed may be located at the end of the plug housing 11, and the opening through which the second and third electrodes 13 and 14 are exposed may be located on the side of the plug housing 11. can be located

In addition, the socket 2 according to an embodiment of the present invention includes a socket housing 21 having a hollow hole so that the plug 1 can be inserted, fixing parts 22a and 22b for being fixed to a wall, a multi-tap, etc., and a first to third conductive terminals 23, 24, and 25. At this time, the second and third conductive terminals 24 and 25 are formed along the curved surface of the hollow inner surface, so that when the plug 1 is inserted into the hollow of the socket 2, they are disposed on the side surface of the plug housing 11. The second and third electrodes 13 and 14 may contact the second and third conductive terminals 24 and 25, respectively.

In this way, the plug 1 and socket 2 of the present invention can be manufactured in a smaller size compared to a conventional plug by using the side portion to arrange electrodes and conductive terminals. Hereinafter, with reference to FIGS. 2 to 5, the cylindrical plug 1 and socket 2 of the present invention will be described in detail. Additionally, with reference to FIGS. 6 and 7 , a rectangular plug 6 according to another embodiment of the present invention will be described in detail.

FIG. 2A is a diagram showing the internal structure of the plug 1 according to an embodiment of the present invention, FIG. 2B is a cross-sectional view of the plug 1 according to an embodiment of the present invention, and FIG. 2C is a diagram showing the internal structure of the plug 1 according to an embodiment of the present invention. This is a diagram showing the second electrode 13 separated according to an embodiment.

As previously described, the plug 1 includes a cylindrical plug housing 11 and first to third electrodes 12, 13, and 14. First, as shown in FIG. 2A, the first electrode 12 is formed in a cylindrical shape along the central axis C of the plug housing 11, and a portion of the first electrode 12 protrudes outward from the end of the plug housing 11. It can be. At this time, the first electrode 12 is a ground electrode and can be connected to the socket 2 for grounding.

The second electrode 13 is formed in an annular shape surrounding the first electrode 12, and at least a portion of the outer surface along the side of the plug housing 11 may be exposed to the outside. The third electrode 14 is spaced apart from the second electrode 13 and is formed in an annular shape surrounding the first electrode 12 on the inside of the plug housing 11 rather than the second electrode 13. ), at least a portion of the outer surface along the side of the plug housing 11 may be exposed to the outside. At this time, the second and third electrodes 13 and 14 may be power electrodes and may be electrodes for receiving power from the socket 2.

In addition, as shown in FIGS. 2A and 2B, the first to third electrodes 12, 13, and 14 are connected to a wire embedded in a power line (not shown) connected to one end of the plug 1. It may be connected to the first to third extension parts 12', 13', and 14', respectively. The first extension 12' is connected to the first electrode 12, and, like the first electrode 12, is a cylindrical conductor and may be disposed along the central axis C of the plug housing 11. . The diameter d2 of the first extension 12' may be smaller than the diameter d1 of the first electrode 12, but is not limited thereto. Additionally, the first extension 12' may be connected to the ground wire of the power line at one end of the plug 1, thereby grounding the first electrode 12.

As shown in FIG. 2C, the second extension portion 13' is connected to the second electrode 13 on the inside of the second electrode 13 and extends toward the central axis C of the plug housing 11. It may be a plate-shaped conductor that is bent and formed into a curved surface surrounding a portion of the first extension portion 12' disposed on the central axis C. As shown in FIG. 2A, the second extension portion 13' is bent and molded toward the central axis C, thereby stably forming a space in which the third electrode 14 will be placed. Meanwhile, the width (w1) of the second extension portion (13') on the second electrode (13) side may be made wider than the width (w2) on the central axis (C) side for electrical stability and efficient use of space. .

The third extension 14', like the second extension 13', is connected to the third electrode 14 on the inside of the third electrode 14, and is connected to the central axis C of the plug housing 11. ) It may be a plate-shaped conductor that is bent and formed into a curved surface surrounding a portion of the first extension portion 12'. At this time, the second extension part 13' and the third extension part 14' may be curved surfaces that surround other parts of the first extension part 12' so as not to contact each other. Meanwhile, since the shape of the third extension 14' is similar to that of the second extension 13' in FIG. 2C except for the direction, a detailed description is omitted.

Meanwhile, in the above description, the first to third extensions 12', 13', and 14' were described as being separately joined and/or combined with the first to third electrodes 12, 13, and 14, but in the implementation In some examples, the first to third extensions 12', 13', and 14' may be formed integrally with the first to third electrodes 12, 13, and 14, respectively.

Additionally, the interior of the plug housing 11 may be filled with an insulating material. Accordingly, the first to third electrodes 12, 13, and 14 and the first to third extension parts 12', 13', and 14' can be insulated and fixed by the insulating material.

In addition, in the above description, in consideration of electrical stability, the first electrode 12 formed in a cylinder on the central axis C of the plug 1 is used as a ground electrode, but the present invention is not limited thereto. Depending on the implementation, the second electrode 13 or the third electrode 14 may be implemented as a ground electrode. In this case, the first and second electrodes 12 and 13 or the first and third electrodes 12 and 14 may be used as power electrodes.

FIG. 3A is a diagram showing an example in which the plug 1 of the present invention is equipped with a fastening device 3, and FIG. 3B is a diagram showing a side view and a front view of the fastening device 3 of the present invention.

Referring to FIGS. 3A and 3B , the plug 1 may further include a fastening device 3 that is fastened to the socket 2 at one end. The fastening device 3 may include a hollow 32 fitted into the plug housing 11, a coupling portion 31 coupled to the socket 2, and a cover portion 34 covering one end of the socket housing 21. You can.

More specifically, the diameter of the hollow 32 corresponds to the diameter of the plug housing 11, and may include a sealing member 35 on the inner surface to improve the sealing force with the plug housing 11. The sealing member 35 may be, as a non-limiting example, an O-ring.

The diameter d3 of the coupling portion 31 may correspond to the inner diameter of the socket housing 21 (see d5 in FIG. 4B). In addition, the coupling portion 31 may be formed with a screw thread that can be coupled to the screw thread on the inner surface of the socket housing 21 (see 26 in FIG. 4B), but is not limited thereto, and is not provided with a screw thread and is used in the socket housing. It may be fitted into the inner surface of (21).

The diameter d4 of the cover portion 34 may correspond to the outer diameter (d6 in FIG. 4B) of the socket housing 21. In addition, the cover portion 34 includes a sealing member 33 on one surface in contact with the socket housing 21, thereby improving the sealing force through coupling with the socket housing 21 and at the same time protecting the inside of the socket housing 21. By blocking it from the outside, dust, etc. can be prevented from flowing inside, and wear of the cover portion 34 and the socket housing 21 can be prevented.

Meanwhile, the fastening device 3 may be fixed to one position of the plug housing 11, but depending on the implementation, it may be implemented to be movable in the longitudinal direction of the plug housing 11.

FIG. 4A is a diagram for explaining the socket 2 according to an embodiment of the present invention, FIG. 4B is a cross-sectional view of the socket 2 according to an embodiment of the present invention, and FIG. 4C is an embodiment of the present invention. This is a drawing to explain the inner structure of the socket 2 according to .

Referring to FIGS. 4A to 4C, the socket 2 according to an embodiment of the present invention includes a hollow 27 into which the plug 1 is inserted and first to third conductive terminals formed on the inner side of the hollow 27. May include (23, 24, 25). At this time, the first to third conductive terminals 23, 24, and 25 have contact portions 23', 24', and 25' in contact with the plug 1, and are connected from the contact portions 23', 24', and 25'. It may include first to third connection parts 23", 24", and 25" that extend and are exposed to the outside of the socket housing 21. First to third connection parts 23", 24", and 25". Can be connected to a power supply line (not shown) from the outside of the socket housing 21, and since it will be easily understood by those skilled in the art of the present invention, detailed description will be omitted.

More specifically, the first conductive terminal 23 extends from a disk-shaped first contact portion 23' formed on the end surface of the hollow 27 of the socket housing 21 and one surface of the first contact portion 23' to form a socket. It may include a first connection part 23" exposed to the outside of the housing 21. In this case, the first contact part 23' and the first connection part 23" are conductors and can be used as a ground. Additionally, the first contact portion 23' may further include a protrusion 28 made of a conductor for stable contact with the first electrode 12 of the plug 1, but this is not essential. The first connection portion 23" may be a plate-shaped or cylindrical conductor, but is not limited thereto.

The second conductive terminal 24 has a curved plate-shaped second contact portion 24' surrounding the inner surface of the hollow 27 of the socket housing 21, and has one end on the outer surface of the second contact portion 24'. This connection may include a second connection portion 24" that extends from the inside of the socket housing 21 along the side of the socket housing 21 and the other end is exposed to the outside. The second connection portion 24" It may be a plate-shaped conductor formed with a curved surface or a rectangular parallelepiped-shaped conductor, but is not limited thereto. AC power may be supplied to the second conductive terminal 24.

The third conductive terminal 25 has a curved plate-shaped third contact portion 25' surrounding the inner surface of the hollow 27 of the socket housing 21 and one end on the outer surface of the third contact portion 25'. It may include a third connection portion 25" that is connected and extends from the inside of the socket housing 21 along the side of the socket housing 21 so that the other end is exposed to the outside. The third connection portion 25" has a curved surface. It may be a plate-shaped conductor or a rectangular parallelepiped-shaped conductor, but is not limited thereto. Like the second conductive terminal 24, AC power can be supplied to the third conductive terminal 25.

Meanwhile, as shown in FIG. 4C, the second contact portion 24' may include a first opening O1. That is, the second contact portion 24' may open a portion of the inner surface of the socket housing 21 rather than surrounding the entire inner surface portion. At this time, the position where the third connection portion 25" extends may correspond to the first opening O1. This means that the third connection portion 25" of the third conductive terminal 25 is connected to the second conductive terminal 24. This may be to prevent interference from and may be to improve electrical stability. Meanwhile, in FIG. 4C, the third contact portion 25' is shown as including a second opening O2 to ensure balance between the second and third conductive terminals 24 and 25, but this is not essential.

Additionally, depending on the implementation, the first to third connection portions 23", 24", and 25" may be omitted or may not be exposed to the outside of the socket housing 21. In the above case, the inside of the socket housing 21 The power supply line is directly connected to the first to third contact portions 23', 24', and 25', or the first to third connection portions 23", 24", and 25" are connected inside the socket housing 21. It can also be connected to a power supply line.

In addition, the socket 2 of the present invention may include a screw thread 26 on the outer inner surface of the socket housing 21, as shown in FIG. 4B. The screw thread 26 is fastened with a screw thread (see 31 in FIG. 3B) provided in the fastening device 3 of the plug 1, thereby allowing the plug 1 to be fixedly coupled to the socket 2.

Figure 5 is a diagram showing the plug (1) - socket (2) assembly of the present invention. The plug 1 and the socket 2 according to an embodiment of the present invention are formed in a cylindrical shape, allowing the user to insert the plug into the socket from various directions. In addition, the first and second sealing members 33 and 35 of the fastening device 3 improve the sealing force through coupling between the plug 1 and the socket 2, thereby preventing foreign substances such as dust from accumulating inside the socket 2. By blocking it, you can prevent the risk of fire from increasing.

Figure 6 is a diagram showing a plug 6 according to another embodiment of the present invention. Referring to Figure 6, unlike the plug 1 described in Figures 1 to 5, it may be formed in a rectangular shape. This may be a structure to prevent the plug from rotating in the socket or to prevent the power line from being twisted. Since the plug 6 in FIG. 6 is related to the plug 1 described in FIGS. 1 to 5, the description in FIGS. 1 to 5 is omitted.

More specifically, the plug 6 according to another embodiment of the present invention includes a rectangular plug housing 61, first to third electrodes 62, 63, and 64 built into the plug housing 61, and a socket. It may include a fastening device 65 that is fastened. At this time, the plug housing 61 may have a depression in which a portion of two opposing sides are recessed inward from one end to the other, and the second and third electrodes 63 and 64 are formed on the outer surface of the depression. It can be provided. Here, the second and third electrodes 63 and 64 may be power electrodes that receive alternating current power from a socket. Additionally, the first electrode 62 may be partially exposed on other sides of the plug housing 61 other than the two sides. The first electrode 62 may be a ground electrode. Additionally, the first to third electrodes 62, 63, and 64 may be connected to a power line inside the plug housing 61 through first to third extension parts (not shown).

The fastening device 65 may be provided on the outer surface with a sealing member (see 71 in FIG. 7 ) for fastening the plug 6 into the socket. At this time, the diameter of the fastening device 65 may correspond to the inner diameter of the socket. However, it is not limited to this, and the fastening device 65 may be rotatably implemented separately from the plug housing 61. In this case, the fastening device 65 may further include threads on the outer surface.

Meanwhile, in the above description, two electrodes are shown as being provided in the recessed portion of the housing, but this is not limited to this. The two electrodes may be disposed on opposing protrusions, one side, or different sides of the housing.

FIG. 7 is a view showing the plug 6 of FIG. 6 from another direction.

Referring to FIG. 7 , the fastening device 65 may be provided with a handle 72 on the side opposite to the side where the plug housing 61 is provided so that the user can easily hold it. At this time, the handle 72 may be formed in various shapes that can be held by the user. In addition, the fastening device 65 may further include a wire housing 73 made of a hard material to prevent the wires from being bent or worn in the fastening device 65 that is frequently used by users. Through this, the plug 6 according to another embodiment of the present invention can be used stably while extending its useful life.

Figure 8 is a diagram showing a connector device according to another embodiment of the present invention. A connector device according to another embodiment of the present invention has a socket structure in which the plug 1 of FIGS. 1 to 5 described above is formed on one side, and at least one terminal and/or a ground electrode of another plug can be inserted. A second connector ( 9) Includes. That is, the ground electrode (see 12 in FIG. 1) and the power electrode (see 13 and 14 in FIG. 1) provided at the front end of the first connector device 8 can be formed as conductive terminals instead of being connected to the power line. there is. For example, the ground electrode 12 of the first connector device 8 may branch from the end of the first connector device 8 to form ground terminals 81a and 81b, and each power electrode 13 and 14 ) may be connected to a plate-shaped conductive terminal surrounding the inner surface of the two hollow spaces 82a and 82b. Additionally, another plug structure provided at the front end of the second connector device 9 is not particularly limited. A user can connect devices having different plug shapes and socket shapes using the first connector device 8 and the second connector device 9.

In addition, the first connector device 8 and the second connector device 9 of the present invention may further include a sealing member 83 to improve sealing force when plugging in, but it is not essential. The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention. In addition, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but are provided for explanation, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, the scope of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1: plug
2: socket
3: Fastening device
11: Plug housing
12: first electrode
12': first extension
13: second electrode
13': second extension
14: third electrode
14': third extension
21: Socket housing
23: first conductive terminal
24: second conductive terminal
25: Third conductive terminal
26: thread
27: hollow

Claims (11)

A plug-socket assembly comprising a socket and a plug connected to an end of a power line to be connected to or disconnected from the socket,
A cylindrical plug housing, a first electrode formed in a cylindrical shape and protruding as part of one end of the plug housing; A second electrode is formed in an annular shape surrounding the first electrode and is exposed to the outside from the plug housing, disposed behind the second electrode based on the direction in which the plug is inserted into the socket, and a plug including a third electrode formed in an annular shape surrounding the first electrode and having an outer surface exposed to the outside from the plug housing, and a fastening device disposed at one end of the plug housing and coupled to the socket; and
It includes a socket housing having a hollow into which the plug is inserted, a first conductive terminal formed on an end surface of the hollow of the socket housing and having a first contact part to which the first electrode comes into contact, and a second contact part to which the second electrode comes into contact. A second conductive terminal, a third conductive terminal including a third contact portion to which the third electrode is in contact, and a socket formed inside the hollow and including a means for engaging the fastening device,
The fastening device includes a coupling part including a fastening hollow and thread for fitting into the plug housing, and a cover part covering one end of the socket housing,
The means for engaging the fastening device includes a thread formed on an outer inner surface of the socket housing,
The plug and socket are assembled by engaging the fastening device and the means for engaging the fastening device,
The first electrode is a ground electrode, and the second and third electrodes are power electrodes,
Plug-socket assembly.
According to claim 1,
It further includes a first extension part, a second extension part, and a third extension part connecting each of the first to third electrodes and a wire embedded in the power line,
The first extension portion is connected to the first electrode and is a cylindrical conductor disposed along the central axis of the plug housing,
The second extension portion is connected to the second electrode inside the second electrode, and is a plate-shaped conductor that is bent toward the central axis of the plug housing and formed into a curved surface surrounding a portion of the first extension portion,
The third extension portion is connected to the third electrode on the inside of the third electrode, and is a plate-shaped conductor that is bent toward the central axis of the plug housing and formed into a curved surface surrounding a portion of the first extension portion,
Plug-socket assembly.
According to claim 2,
The diameter of the first extension portion is smaller than the diameter of the first electrode,
Plug-socket assembly.
delete delete delete According to claim 1,
The second conductive terminal has a first opening in a portion of the plate shape,
Plug-socket assembly.
According to claim 7,
The first conductive terminal further includes a first connection portion extending from one surface of the first contact portion and exposed to the outside of the socket housing,
The second conductive terminal further includes a second connection portion whose one end is connected to the outer surface of the second contact portion, and which extends from the inside of the socket housing along the side of the socket housing and whose other end is exposed to the outside,
The third conductive terminal further includes a third connection portion whose one end is connected to the outer surface of the third contact portion, and which extends from the inside of the socket housing along the side of the socket housing and whose other end is exposed to the outside,
The position where the third connection extends corresponds to the position of the first opening,
Plug-socket assembly.
According to claim 1,
The first conductive terminal is used as ground, and the second and third conductive terminals are supplied with alternating current power,
Plug-socket assembly.

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