KR100927359B1 - Electrical outlet with spun connection - Google Patents

Abstract

The present invention provides a connection set that is set as one type while improving safety and increasing service life while the connection part is rotated, so that it can be applied to all models of multi-conductor electrical outlets manufactured by various spheres. It relates to an improved electrical outlet so that the assembly is good and the productivity can be improved, the top plate member 10 having a pipe portion 12 to form a plug insertion hole (11); A tubular case 20 fixed to the tubular part 12; A circular non-conductive safety cover member having a pair of fitting holes 32 and 32 'installed therein, the outer periphery end portion 31 being rotatably inserted into the circular slip groove 21 formed on the inner circumferential surface of the case 20 ( 30); Inserted so as to be positioned inside the case 20 of the lower side of the safety cover member 30, and the connection terminal members 42, 42 'having terminal connection holes 42a are fitted in the pair of terminal holes 41, 41', respectively. A non-conductive connection part rotating member 40 which is installed in a fork and has lower and lower spring portions 45 and 45 ', respectively; The lower end of the connecting terminal members 42 and 42 'is inserted into a pair of terminal grooves 51 and 51' formed at an upper side of the connecting part rotating member 40, and the lower side of the terminal grooves 51 and 51 '. The contact protrusion part 53a of the conduction terminal 53, 53 'which is in close contact with the connection terminal members 42, 42' by the through hole 52, 52 'which is drilled in is fitted to protrude downward. The non-conductive material having the elastic members 56 and 56 'coupled to the spring grooves 55 and 55' formed to the outside of the terminal grooves 51 and 51 'and the spring grooves 45 and 45' opposite thereto, respectively, is provided with elasticity. The pressure rotating member 50; The rotating groove 61 is fixed to the lower side of the case 20 and has a locking jaw portion 62 in which the pressure rotating member 50 is inserted and caught. A central protrusion 64 is provided at the lower center of the rotating groove 61. And both sides of the central protrusion 64 are provided with energizing plate members 67 and 67 ', respectively, in the installation grooves 66 and 66', which are separated by the separating wall members 65 and 65 ', respectively. The connecting piece members 67a of the plate members 67 and 67 'are inserted into the connecting holes 68 and 68', and the connecting pieces 68 and 68 'are brought into close contact with the connecting piece members 67a. And a non-conductive body member 60 in which the bent ball piece members 69 and 69 'having elasticity for pressurizing the wire K inserted into the 68 and 68' are respectively formed. The connection part rotating member 40 penetrates the through hole 63a of the bushing 63 and the bolt through hole 54 of the pressure rotating member 50 coupled to the center wheel part 64 of the member 60 in the vertical direction. Plug ground coupled between the elongated ground bolt 80 and the safety cover member 30 and the connection part rotating member 40 fastened to the nut member 43 fixed to the connection part rotating member 40 through the bolt shaft hole 44. A member 90 is further provided, but the ground piece portions 91 and 91 'are exposed to the plug insertion hole 11 through the through holes 33 and 33' on both sides of the safety cover member 30, and the plug ground member. The coupling hole 92 of 90 provides an electrical outlet having a grounding function by allowing the ends of the ground bolts 80 to be coupled.

Electrical Outlet, Outlet, Swivel Outlet

Description

Connection outlet the electric cone which rotates it counted, thu}

The present invention relates to an electrical outlet, and more particularly, to an electrical outlet to which the connection portion to which the plug terminal rod is inserted to be rotated while rotating the connection portion to increase the lifespan, reduce cost and improve productivity.

Document 1 KR 10-1997-0054949 A 1997.07.31

Document 2 KR 20-0183098 Y1 2000.05.15

In general, since the electrical outlet has a structure in which the plug terminal bar is simply inserted and connected, when the A-shaped plug is inserted into a multi-pole electrical outlet, for example, a two-or five-pole electrical outlet (hereinafter referred to as a "poly-conductor electrical outlet"). In addition to the inconvenience caused by interference between the plugs, it is preferable that the wires connected to the plugs are wired to the electrical device. However, in some cases, the wires are bent in a state where the wires are bent as the plug is inserted in the reverse direction. If a case occurs, there is a problem of undesirable wiring.

Therefore, the outlet for rotating the connection is disclosed in Korean Laid-Open Patent Publication No. 1997-0054949, but since the connection is made to be elastic rotation by using the ratchet piece and the ratchet protrusion, the durability is weak and lacks the safety and the terminal connector. If the arc-shaped power plate is worn, there is a disadvantage in that the connection is not properly, there is a problem that the life is shortened.

In addition, even in the outlet disclosed in Korean Utility Model Registration No. 20-0183098, the contact simply protrudes under the connecting terminal to be connected to the connecting piece. As well as having a structure in which the connection terminal is simply supported on the support, there is a problem in that it is not robust and the safety falls.

In addition, the above-described electrical outlets of the prior art have a problem that the cost rises because each injection mold to make each body when manufacturing the 1-, 2-, 3-, or multi-spherical electrical outlet for each model must be made In addition, since the shape of the parts are different for each model of the multi-conductor type electrical outlet, there are problems of difficulty in managing parts, increasing assembly costs, and increasing manufacturing costs, thereby weakening internal and external competitiveness.

It is an object of the present invention to provide an electrical outlet in which safety is improved and lifespan is enhanced while the connection part rotates.

Another object of the present invention, by providing a connection set unit set in one kind can be adopted in all models of multi-spherical electrical outlets manufactured by several spheres, as well as cost reduction, as well as good assembly performance and productivity can be improved. I'm trying to.

The present invention for achieving the above object, and a non-conductive top plate member having a pipe portion forming a plug insertion hole; A non-conductive case in the form of a tube fixed to the tube; A circular non-conductive safety cover member having an outer peripheral end portion inserted into the circular slip groove portion formed on the inner circumference of the case and rotatably installed and having a pair of fitting holes; A non-conductive connecting part rotating member inserted into the case under the safety cover member and installed in the pair of terminal holes, each connecting terminal member having a terminal connecting hole inserted therein, and each having a spring groove in the lower side thereof; The lower end of the connection terminal member is inserted into the pair of terminal grooves formed in the upper portion of the connection part rotating member, and the contact protrusion wheel part of the conduction terminal is brought into close contact with the connection terminal member by a through hole drilled under the terminal groove. A non-conductive pressurizing member which is coupled to protrude downward and has a spring groove portion formed outside the terminal groove portion and a spring groove portion facing the spring groove portion, the elastic members being coupled to each other to receive elasticity; The rotating groove has a locking jaw fixed to the lower side of the case and the pressure rotating member is inserted into the locking groove, and the central groove is located at the lower center of the rotary groove and the installation grooves are separated from each other by the separating wall member. Each of the energizing plate members is installed, but the connecting piece member of the conducting plate member is inserted into the connection hole, and the bending ball piece member having elasticity to press the electric wire inserted into the connection hole while being in close contact with the connection piece member, respectively. Characterized in that it is configured to include a non-conductive body member embedded.

The case is characterized in that the engaging hook of the plurality of snap piece portions formed between the plurality of split groove portions at the upper end portion is caught and fixed to the locking jaw groove portion formed in the outer periphery of the pipe portion of the upper plate member.

The body member is characterized in that the engaging hook of the plurality of snap piece portions formed between the plurality of split groove portions at the upper end portion is caught and fixed to the locking jaw groove portion formed in the outer periphery of the case.

Another feature is that the protrusion is projected to the outer circumferential surface of the contact protrusion part of the conduction terminal protruding downward through the through hole to be caught on the bottom of the pressure rotating member.

A long ground bolt fastened to the nut member fixed to the connection part rotating member through the bolt shaft hole of the connection part rotating member through the through hole of the bushing coupled to the center wheel part of the body member and the bolt through hole of the pressure rotating member; A plug grounding member is further provided between the safety cover member and the connection part rotating member. The grounding part is exposed to the plug insertion hole through the through holes on both sides of the safety cover member, and the end of the ground bolt is connected to the coupling hole of the plug grounding member. It is another feature that it is made to be combined.

According to the present invention, the plug is inserted to be supplied with electricity, so that the plug can be conveniently connected to the plug, and in the case of a multi-shaped electrical outlet, the plug can be rotated without interference from other plugs. In addition, since the components that allow electricity to be energized are installed in the lower part of the electrical outlet, the electric shock safety is not only improved, but the pressure rotating member is pressed toward the energizing plate member. By not being disconnected, there is an effect of providing an electrical outlet to increase the lifespan, and provides an effect of greatly improving product reliability.

And since the present invention can be adopted in all models of multi-spherical electric outlets manufactured by several spheres by providing a connection set unit set as one type, it is not necessary to have all the molds of all parts for each model, thereby reducing the cost. Since good assembly is provided, not only the effect of improving productivity is provided, but also the manufacturing cost is reduced, thereby providing an effect of improving external competitiveness.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of the entire separation of the electrical outlet according to the present invention, Figure 2 shows a longitudinal cross-sectional view showing an embodiment.

1 and 2, the present invention includes a non-conductive top plate member 10 having a tube portion 12 forming a plug insertion hole 11. Since the parts are injection molded into plastic, it means parts that are not electrically conductive.

In addition, the present invention includes a non-conductive case 20 in the form of a tube fixed to the tube portion 12 of the upper plate member 10.

The case 20 has a hooking jaw groove portion formed at the outer circumferential portion of the tube portion 12 of the upper plate member 10 with a hook hook 23a of the plurality of snap piece portions 23 formed between the plurality of split groove portions 22 at the upper end portion. It is configured to be caught and fixed to (13), when the case 20 is pushed into the tube portion 12 toward the engaging hook (23a) is slightly opened to the outside and is coupled to be fitted to the locking jaw (13). However, in some cases, the case 20 may be coupled to the tube part 12 using other fixing means.

In addition, the present invention includes a circular non-conductive safety cover member (30). The safety cover member 30 has a pair of fitting holes 32 and 32 'and through holes 33 and 33'.

The safety cover member 30 is assembled to be rotatably installed by inserting the outer circumferential end portion 31 into the circular slip groove 21 formed on the inner circumferential surface of the case 20. At the time of assembly of the safety cover member 30 is slightly inclined to be pushed into the case 20, and a little loose fitting, the safety cover member 30 can be rotated.

In addition, the present invention includes a non-conductive connection part rotating member 40 which is installed to be inserted into the case 20 under the safety cover member 30.

The connection part rotating member 40 has a pair of terminal holes 41 and 41 ', and the terminal holes 41 and 41' are made of metal (brass) having terminal connection holes 42a, respectively. The members 42 and 42 'are provided to be fitted.

In addition, spring grooves 45 and 45 'are provided at the lower portion of the outer side of the terminal holes 41 and 41', and the nut member 43 is fixed to the middle upper portion thereof. It is configured to be formed.

The nut member 43 is fixed to the upper end part of the intermediate part by insert injection molding when the injection part rotating member 40 is injection molded.

On the other hand, since the connection terminal member used in the conventional electrical outlet had coupling pieces at both sides, the loss rate (loss rate) of the flat plate member, which is a raw material, was large, but the connection terminal member 42 according to the present invention was used. 42 ') is formed by cutting the flat plate member in a straight shape to be rolled in a circular shape, so that there is no loss rate of the flat plate member, thereby providing connection terminal members 42 and 42'.

Therefore, the present invention includes a non-conductive pressurizing rotating member 50 installed below the connecting part rotating member 40.

The pressure rotating member 50 is assembled so that the lower end portions of the connection terminal members 42 and 42 'are fitted into the pair of terminal groove portions 51 and 51' formed on the upper side, and the lower side of the terminal groove portions 51 and 51 '. As the through holes 52 and 52 ', the contact protrusions 53a of the conducting terminals 53 and 53' which come into close contact with the connecting terminal members 42 and 42 'are fitted to protrude downward.

The contact protrusions 53a may be fixed by being fitted into the through holes 52 and 52 ', and in some cases, the conductive terminals 53, which protrude below the through holes 52 and 52'. The small protrusion 53b may protrude on the outer circumferential surface of the contact protrusion 53a of the 53 ') so as to be caught by the bottom of the pressure rotating member 50 so as not to fall back into the through holes 52 and 52'.

Spring grooves 55 and 55 'are formed outside the terminal grooves 51 and 51' of the pressure rotating member 50 so that the spring grooves 55 and 55 'and the spring grooves 45 and 45 opposed thereto are provided. ') Each of the elastic members 56, 56' is configured to receive the elasticity, the middle portion is provided with a bolt through hole 54.

The pressure rotating member 50 is configured to be assembled in a state of being inserted into the rotary groove 61 of the non-conductive body member 60 which is fixed to the case 20 lower side.

The body member 60 has a hook hook 72a of a plurality of snap piece portions 72 formed between a plurality of split groove portions 71 at an upper end thereof and is caught by a catch jaw groove 24 formed at an outer periphery of the case 20. It is intended to be fixed. However, in some cases, the body member 60 may be fixed to the case 20 by using other fixing means.

Therefore, the lower side of the rotating groove 61 of the body member 60 has a locking jaw portion 62 that can be locked by the pressure rotating member 50, the lower central portion has a central protrusion wheel 64 and the central wheel wheel 64 ) Both sides are provided with installation grooves 66 and 66 ', which are respectively isolated by the separating wall members 65 and 65'.

The central protrusion wheel 64 is configured such that the bushing 63 having the through hole 63a is coupled in the vertical direction.

In addition, the installation grooves (66, 66 ') are provided with the current carrying plate members 67, 67', respectively, but the connecting piece members (67a) of the current carrying plate members (67, 67 ') are connected to the connection hole (68, 68) ') And the bending ball piece member having elasticity to press the electric wire (K) inserted into the connection hole (68, 68') while being in close contact with the connection piece member (67a) to the connection hole (68, 68 ') (69,69 ') are configured to be built in, respectively.

When the electric wire K is forcibly inserted into the connection holes 68 and 68 ', respectively, the wire K is pushed and inserted while pushing the bent carbon piece members 69 and 69'. By close contact with each other.

Therefore, the electricity of the electric wire K flows to the conduction plate members 67 and 67 'which are in contact with the bent coal piece members 69 and 69', thereby connecting the connection terminal members 42 and 42 through the conduction terminals 53 and 53 '. ') To flow.

In Fig. 1, the engaging piece members 67b on both sides of the conducting plate members 67 and 67 'are coupled to be fitted to the engaging grooves 73 formed on both sides of the installation grooves 66 and 66', thereby providing the conducting plate members. 67, 67 ') can be combined in the correct position.

Figure 2 shows an electrical outlet of an embodiment of the present invention, the electrical outlet is an ungrounded electrical outlet, this ungrounded electrical outlet is mainly used as a multi-use electrical outlet.

Therefore, in the present invention, when the pair of plug terminal bars Pa in the plug P is fitted into the fitting holes 32 and 32 'of the safety cover member 30, the plug terminal bars Pa are connected to the connection part rotating member. It is inserted into the terminal connection hole 42a of the 40 to be in contact with the connection terminal members 42 and 42 ', respectively, so that electricity is supplied. In this state, the plug P is illustrated in FIG. When rotated in the left direction or the right direction as described above, the safety cover member 30 and the connection part rotating member 40 to which the plug terminal bar Pa is fitted are rotated.

In addition, the pressure rotating member 50 connected by the connection part rotating member 40 and the connection terminal members 42 and 42 'is simultaneously rotated.

Therefore, the contact protrusions 53a of the energization terminals 53 and 53 'in the pressure rotating member 50 are also rotated together, but as shown in FIG. 4, the contact plate members 67 and 67' are in contact with each other. In this state, the electricity flows to the connection terminal members 42 and 42 'through the conducting terminals 53 and 53' as well as the rotating process. Will be supplied.

And as shown in FIG. 6 in the process of rotating as described above, as the contact protrusion 53a is caught by the isolation wall members 65 and 65 ', the rotation operation stops without further progressing and an electric short phenomenon due to a short circuit occurs. Is not generated and the radius of rotation can be rotated by 180 degrees.

According to the present invention operated as described above, the contact wheel part 53a of the conducting terminals 53 and 53 'and the conducting plate members 67 and 67' are subject to abrasion. In this case, the elastic members 56 and 56 Since the pressure rotating member 50 is pressed downward by the pressing force of '), the contact protrusion 53a and the current carrying plate members 67 and 67' are always kept in contact with each other. This can improve product reliability and increase lifespan.

5 and 6 show another embodiment of the present invention, showing a grounding type electrical outlet mainly used as an embedded electrical outlet embedded in a building wall.

In this case, since the long ground bolt 80 and the plug grounding member 90 are further provided in the multi-type electrical outlet shown in FIG. 2, the description of the configuration of the electrical outlet shown in FIG. 2 is omitted and the ground bolt 80 is further provided. ) And the plug grounding member 90 will be described only.

5 and 6, the elongated ground bolt 80 is a through hole 63a of the bushing 63 coupled to the center wheel portion 64 of the body member 60 in a vertical direction and a pressure rotating member ( It is fastened to the nut member 43 fixed to the connection part rotating member 40 through the bolt shaft hole 44 of the connection part rotating member 40 penetrating through the bolt through hole 54 of 50).

The plug grounding member 90 is coupled between the safety cover member 30 and the connection part rotating member 40.

At this time, as shown in Figure 6 through the through holes 33, 33 'on both sides of the safety cover member 30 to expose the ground piece (91, 91') to the plug insertion hole 11 and the plug ground member The coupling hole 92 of the 90 is configured to be coupled through the end of the ground bolt (80). Reference numeral 34 denotes a space portion into which the end portion of the ground bolt 90 may be inserted, and is intended to prevent the ground bolt 90 and the safety cover member 30 from interfering with each other.

In the combined state as described above, since the plug grounding member 90 made of metal (brass) is in contact with the nut member 43 which is also made of metal, and the nut member 43 is in contact with the ground bolt 80. As shown in FIG. 3, when the plug P is inserted into the plug insertion hole 11, the ground piece portions 91 and 91 ′ are grounded with the plug P. FIG. Here, the grounding structure of the plug P is a known structure as a metal plate (not shown) is fixed to both sides of the plug P, and thus detailed drawings and descriptions thereof will be omitted.

In addition, when the plug P is rotated, the safety cover member 30 and the connection part rotating member 40 and the pressure rotating member 50 are rotated at the same time as the multi-type electric outlet shown in the embodiment as shown in FIG. Since the ground member 90 and the ground bolt 80 are also rotated at the same time, the grounding member 90 and the ground bolt 80 can be smoothly rotated without causing any trouble to the rotating operation.

On the other hand, the present invention is a structure that is assembled to be a set as a state in which all the parts in the case 20 and the body member 60 that can be coupled to each other inside. For the sake of understanding, the components assembled as a set as described above will be defined and described as the connection set part 100.

Therefore, the present invention can be largely divided into the upper plate member 10 and the connection set portion 100.

Therefore, the upper plate member 10 'having two plug insertion holes 11 can be injection molded when manufacturing a two-spherical electric outlet as illustrated in FIG. In the case of the outlet, only the upper plate member 10 'having three to five plug insertion holes 11 suitable for them is manufactured by injection molding separately and then each connection is made under the plug insertion hole 11. Combining the set portion 100 can be manufactured for each sphere required.

That is, the present invention has a configuration that the connection set unit 100 can be used in common, not only one-hole electrical outlet, but also two-hole electrical outlet and multi-hole electrical outlet.

Therefore, when manufacturing the electrical outlet for each sphere, only the injection mold for obtaining the upper plate member (10, 10 ') for each sphere is different, the configuration of the connection set part 100 is the same, so the connection set part 100 Since injection molds and press molds for manufacturing can be used in common, it is possible to reduce costs such as depreciation costs due to the reduction of manufacturing mold as a whole when manufacturing multi-hole electrical outlets including one-spherical electrical outlets.

For the sake of understanding, in the past, in order to manufacture one-segment electric outlets and multi-spherical electric outlets, the structure of each sphere was slightly different, so each manufacturing mold was required for each sphere. In addition to the increase in manufacturing cost, such as parts management, but the present invention is different only the shape of the top plate member (10, 10 ') by the sphere, the connection set part 100 can be used in common, reducing the manufacturing mold and cost reduction This can be planned.

In addition, since the number of parts is small when the electric outlets are manufactured for each sphere as a whole, the parts are easy to manage and are produced by assembling them into one set of connection sets 100. As a result, manufacturing cost can be reduced.

Therefore, the present invention can be adopted in all models of the multi-spherical electric outlet manufactured by several spheres by providing a connection set 100 set as a kind, as well as cost reduction and good assemblage and improved productivity. As a result, it is possible to provide a low cost electrical outlet with high safety and product reliability in an electrical outlet having a connector rotation function.

And although the present invention has been described by way of limited embodiments and drawings, it is obvious that the present invention is not limited to the above embodiments and should be widely applied and protected without departing from the scope of the claims.

1 is an overall separation perspective view of an electrical outlet according to the present invention;

2 is a cross-sectional view of the entire combination of the electrical outlet of one embodiment according to the present invention;

Figure 3 is a plan view of the electrical outlet for explaining the rotation operation of the use state of the present invention,

4 is an enlarged cross-sectional view taken along line X-X 'of FIG. 2;

5 is an overall cross-sectional view of an electrical outlet showing another embodiment of the present invention;

6 is a cross-sectional view of the line Y-Y 'of FIG.

7 is a longitudinal cross-sectional view illustrating a multi-spherical electric outlet according to the present invention.

Explanation of symbols on the main parts of the drawings

10: upper plate member 20: case

21: slip groove portion 30: safety cover member

31: outer circumferential end portion 40: connection part rotating member

42,42 ': Connection terminal member 43: Nut member

50: pressure rotating member 53,53 ': energization terminal

56,56 ': Elastic member 60: Body member

61: rotating groove 62: locking jaw portion

64: center wheel part 65,65 ': isolation wall member

67,67 ': energizing plate member 69,69': bent carbon piece member

80: ground bolt 90: plug ground member

100: connection set

Claims (5)

A non-conductive top plate member 10 having a tube portion 12 forming a plug insertion hole 11; A non-conductive case 20 having a tubular shape fixed to the tubular part 12; A circular non-conductive safety cover member having a pair of fitting holes 32 and 32 'installed therein, the outer periphery end portion 31 being rotatably inserted into the circular slip groove 21 formed on the inner circumferential surface of the case 20 ( 30); Inserted so as to be positioned inside the case 20 of the lower side of the safety cover member 30, and the connection terminal members 42, 42 'having terminal connection holes 42a are fitted in the pair of terminal holes 41, 41', respectively. A non-conductive connection part rotating member 40 which is installed in a fork and has lower portions on both sides thereof and has spring grooves 45 and 45 ', respectively; The lower end of the connecting terminal members 42 and 42 'is inserted into a pair of terminal grooves 51 and 51' formed at an upper side of the connecting part rotating member 40, and the lower side of the terminal grooves 51 and 51 '. The contact protrusion part 53a of the conduction terminal 53, 53 'which is in close contact with the connection terminal members 42, 42' by the through hole 52, 52 'which is drilled in is fitted to protrude downward. The non-conductive material having the elastic members 56 and 56 'coupled to the spring grooves 55 and 55' formed to the outside of the terminal grooves 51 and 51 'and the spring grooves 45 and 45' opposite thereto, respectively, is provided with elasticity. The pressure rotating member 50; The lower side of the case 20, there is a rotating groove 61 having a locking jaw portion 62 is fixed to the pressing rotary member 50 is inserted into the central groove portion 64 in the lower center of the rotary groove 61 And both sides of the central protrusion 64 are provided with energizing plate members 67 and 67 ', respectively, in the installation grooves 66 and 66', respectively, separated by the separating wall members 65 and 65 '. The connecting piece member 67a of the energizing plate member 67 and 67 'is inserted into the connecting hole 68 and 68', and the connecting piece 68 and 68 'is brought into close contact with the connecting piece member 67a. A connection comprising a nonconductive body member (60) in which bent carbon piece members (69, 69 ') having elasticity for pressing the electric wire (K) inserted into the balls (68, 68') are respectively embedded. Electrical outlets with rotating parts. According to claim 1, wherein the case 20 is a hook hook 23a of the plurality of snap piece portion 23 formed between the plurality of grooves 22 in the upper end portion of the tube portion 12 outer periphery of the upper plate member 10 Electrical outlet to which the connection portion is rotated, characterized in that the locking jaw groove portion 13 formed in the edge portion is fixed. According to claim 1, The body member 60 is a locking jaw groove portion formed in the outer periphery of the case 20 of the engaging hook 72a of the plurality of snap piece portion 72 formed between the plurality of split groove portion 71 in the upper end portion The electrical outlet is rotated, characterized in that the connection is made to be fixed to (24). The pressure rotating member (50) according to claim 1, wherein the small protrusion (53b) is projected on the outer circumferential surface of the contact protrusion (53a) of the conducting terminals (53, 53 ') projecting to the lower side of the through hole (52, 52'). Electrical outlet is rotated connecting portion, characterized in that made on the bottom. According to claim 1, The through hole (63a) of the bushing 63 and the bolt through hole (54) of the pressure rotating member (50) coupled in a vertical direction to the central protrusion (64) of the body member (60) The long ground bolt 80 and the safety cover member 30 and the connection part rotating member which are fastened to the nut member 43 fixed to the connection part rotating member 40 through the bolt shaft hole 44 of the connection part rotating member 40. A plug grounding member 90 coupled between the 40 is further provided, but the ground piece portions 91 and 91 pass through the through holes 33 and 33 'on both sides of the safety cover member 30, respectively. ') Is exposed and the electrical outlet to which the connection is rotated, characterized in that the end of the ground bolt 80 is coupled to the coupling hole 92 of the plug grounding member 90.

Images