TWI407651B - Electric outlet - Google Patents

Abstract

An outlet includes an outlet body for supplying electric power to a plug. The outlet body has an insertion surface in which plug blade insertion slots for inserting the plug blades of the plug including a plug case having a front surface from which plug blades are protruded and a rear surface opposite to the front surface in an insertion direction of the plug blades. The outlet includes a door body provided in the outlet body. The door body is movable between a closed state in which it covers the plug blade insertion slots and an open state in which it is separated from the plug blade insertion slots. And the door body has a holding portion for keeping the plug blades inserted into the plug blade insertion slots when the plug blades of the plug are inserted into the plug blade insertion slots.

Description

Electronic socket

The present invention relates to an electric outlet, and more particularly to an outlet device having an outlet body having a plug blade for inserting a plug and Power is supplied to the plug blade insertion slot of the plug.

In general, the socket has a structure that supplies power to the plug and is known by clamping the plug piece of the plug to a blade rest bumper connector that is mounted to the socket. In this configuration, since the plug is easily pulled out by the outdoor socket due to an external force, the operation of the electrical component is unexpectedly stopped due to the pulling out of the plug, or the contact area between the plug piece of the plug and the blade holder is reduced. The increase in resistance may result in high heat.

Therefore, in order to overcome the problem that the plug is pulled out of the socket, a pull-proof plug structure of the plug has been proposed. For example, in Japanese Patent Application Laid-Open No. 2001-185289, the plug is rotated at a predetermined angle after the plug is connected to the socket, and the protrusion of the plug piece holder disposed at the socket is inserted into the plug formed in the plug. The transmitting hole of the sheet, thereby providing a structure for preventing the plug from being pulled out of the socket.

Further, for example, in Japanese Patent Application Laid-Open No. 2004-63164, there is provided a socket comprising: a main body; a blade receiving portion for receiving a front surface formed by passing through the main body The plug piece jack enters the plug piece of the plug of the main body; a terminal board (terminal) for contacting an electric wire entering the main body through an electrical lead hole formed in the main body; and a connection unit for connecting the electric lead and the terminal board, The plug receiving portion and the connecting unit are integrated with the terminal board.

Nowadays, a socket as an outdoor socket is attached to an outer wall of a building such as a house, and an electric component such as an outdoor lighting component is attached to the building, or a vacuum cleaner for cleaning the interior of the vehicle is connected to the socket. Also, outdoor sockets have recently been available to charge electric vehicles. Because outdoor sockets are often used to charge electric vehicles, the number of times the plug is plugged into an outdoor outlet and the plug is pulled out of the outdoor outlet increases.

However, in the socket described in Japanese Laid-Open Patent Publication No. 2001-185289, the plug is inserted into the outdoor socket and the plug is pulled out of the outdoor socket less frequently, for example, about 100 times. In particular, the insertion of the blade into the socket elastically deforms the blade holder and the projection of the blade holder is inserted into the transmission opening of the blade. If the elastic deformation of the blade holder is repeated, the elasticity of the blade holder will deteriorate, and the projection of the blade holder cannot be inserted into the transmission hole of the blade. As a result, if the plug is repeatedly inserted into the socket and the plug is pulled out of the socket, the function of preventing the plug from being pulled out of the socket (hereinafter referred to as the pull-out plug function) may not be operated. Therefore, the structure of the socket is not suitable for the above-mentioned use in which the plug is inserted into the socket and the plug is pulled out of the socket, and it is necessary to improve the structure.

Further, in the above conventional socket device, the plug receiving portion and the terminal are always electrically connected. Therefore, when the plug is inserted into the socket device and the plug is pulled out of the socket device, an arc discharge may occur and a spark may be generated between the plug piece of the plug and the receiving portion of the blade.

Therefore, if a conventional socket device is used at a gas station or a place where a combustible gas is used (for example, an indoor kitchen), the flammable gas may be ignited by the spark of the arc discharge, so there is a safety problem.

In view of the above, the present invention provides a socket that can prevent the deterioration of the function of the tamper-proof plug when the plug is inserted into the socket and the number of times the plug is pulled out of the socket is increased.

In view of the above description, the present invention also provides a socket device which can be safely used even in a place where a flammable gas or the like is used.

Hereinafter, the apparatus and operation for achieving the object of the present invention will be described.

The present invention provides a socket comprising a socket body for supplying power to a plug, the socket body having an insertion surface including a plug socket for inserting a plug piece having a plug of a plug case, the plug The outer casing has a surface such that the front piece protrudes from the front surface and the front surface opposite to the front surface in the insertion direction of the plug piece, and the socket includes: a door body disposed at the socket main body, and the shutter main body can be closed at the cover plug socket The transition between the state and the closed state of the disconnected plug jack, and the shutter body has a holding portion that retains the plug blade into the plug receptacle when the plug blade of the plug is inserted into the plug receptacle.

In the above structure, when the holding portion is attached to the shutter main body, the structure is mounted between the conventional plug piece and the plug piece holder as compared with the pull-proof plug element (as in Japanese Patent Application Laid-Open No. 2001-185289). The plug blade bracket does not excessively elastically deform, so that even the plug is inserted The number of times the head piece is inserted into the plug socket and the plug piece of the plug is pulled out of the plug piece jack, the elasticity of the plug piece holder can be prevented from being deteriorated. Therefore, even if the plug is inserted into the socket and the number of times the plug is pulled out of the socket is increased, the plug piece can maintain the state of being inserted into the plug socket when the plug is inserted into the socket. That is, the function of the pull-out plug can be prevented from deteriorating.

In the above socket, a bias unit is used to bias the shutter body toward the plug socket, wherein the offset unit can offset the shutter body to keep the retaining portion and the plug when the plug blade of the plug is inserted into the plug jack Contact, and the offset unit can offset the shutter body to cover the blade jack when the plug piece of the plug is not inserted into the blade jack.

In the above configuration, since the biasing means maintains the holding portion in contact with the plug, the biasing means can bias the holding portion toward the plug even if the holding portion is attempted to be separated from the plug due to an external collision or the like. Therefore, the deterioration of the pull-out prevention function due to the separation of the holding portion from the plug can be prevented.

Since the operation of the offset device can maintain the closed state of the shutter body, the problem caused by forgetting to close the shutter body can be avoided after the shutter body is opened. Therefore, in a state where the plug is not inserted into the socket, the situation in which water or the like penetrates into the plug of the plug piece can be reduced. Thereby, according to the structure of the present invention, the function of the tamper-proof plug due to the separation of the holding portion from the plug can be prevented from being deteriorated and the penetration of water or the like into the plug-in socket can be reduced.

In the above socket, the holding portion may have a contact portion to contact the rear surface of the plug housing.

In the above structure, when the contact portion is connected to the rear surface of the plug housing When touching, adjust the plug to move directly in front of the insertion direction, that is, the direction of the plug piece of the plug is pulled out by the plug socket. Therefore, the function of the pull-out plug can be further prevented from deteriorating.

In the above socket, the shutter main body may have a door main body covering the entire plug piece insertion hole, and the holding portion may have an inclined portion which is from the main body of the shutter in the insertion direction of the plug. The amount of protrusion counted increases, and when the plug piece of the plug is inserted into the plug piece jack, the shutter body moves in a direction away from the plug piece jack by the plug that contacts the inclined portion.

In the above configuration, if the inclined portion formed in the inclined shape is attached to the holding portion, when the plug and the inclined portion are brought into contact by the insertion of the plug, the shutter main body is moved in the direction away from the plug insertion hole. Therefore, the inclined portion can be prevented from obstructing the plug from being inserted into the socket. As a result, when the plug piece of the plug is inserted into the plug piece jack, the operation of moving the holding portion in the insertion direction of the plug can be smoothly performed and the plug can be easily inserted into the socket.

In the above socket, the contact portion may be disposed in a substantially "L" shape and in contact with the plug, and the contact portion extends from the inclined portion toward the plug insertion direction.

In the above structure, if the contact portion is formed in a substantially "L" shape, the shutter main body will be rotated by the biasing means when the rear surface of the plug housing of the plug is moved to a position corresponding to the contact portion, and thus the rear of the plug housing The surface is in contact with the contact portion. Therefore, the function of preventing the plug of the plug from being pulled out of the plug of the plug can be performed only when the plug is inserted into the socket by the operation of the shifting device. As a result, it is possible to avoid forgetting to prevent the plug from being pulled out of the socket.

In the above socket, the shutter main body may have a substantially flat-shaped shutter main body covering the plug hole of the plug, and the retaining portion may have an inclined portion which protrudes from the main body of the shutter in the insertion direction of the plug It is added, and when the plug piece of the plug is inserted into the plug piece jack, the plug piece is kept inserted into the plug piece jack by the inclined portion in contact with the plug.

In the above structure, the inclined portion may have a force for forcing the plug toward the insertion direction by the biasing means. Therefore, in a state where the inclined portion is in contact with the plug, the plug will be biased toward the inside of the insertion direction. Therefore, the function of the pull-out plug can be prevented from deteriorating.

In the above socket, the shutter main body may cover at least a portion of the side surface of the plug when the plug piece of the plug is inserted into the plug piece jack.

In the above structure, in a state where the plug piece of the plug is inserted into the plug piece insertion hole, since the shutter main body covers at least a part of the side surface of the plug, water can be prevented from infiltrating from a part thereof. Therefore, the waterproof performance of the plug and the socket can be improved.

In the above socket, the insertion surface of the socket body may have a recess portion recessed in the insertion direction of the plug, the recess portion having a bottom surface on which the plug socket is disposed and a side surface surrounding the bottom surface, when the plug When the plug blade is inserted into the plug piece receptacle, the position of the plug is adjacent to the side surface, and the retaining portion is received in the recessed portion when the shutter body is in the closed state.

In the above structure, if the plug approaches the side surface of the groove portion, the user's finger can be blocked when the plug piece of the plug is inserted into the plug piece receptacle Contact with the plug piece. Therefore, it is possible to prevent an electric shock accident that occurs when the user's hand comes into contact with the blade. Here, the "near" distance indicates the distance that the user's finger cannot be inserted into the space between the side surface of the groove portion and the plug.

Further, when the space for receiving the holding portion is not mounted to the socket body, if the holding portion is in contact with the socket body, when the shutter body is in the closed state, a space is formed between the shutter body and the socket body, so that water can penetrate This space. Further, if the space for receiving the holding portion is attached to the socket main body separated from the groove portion, the structure of the socket main body becomes complicated and the size of the socket becomes large. In view of this, in the present invention, since the holding portion is housed in the groove portion, a space can be prevented from forming between the shutter main body and the socket main body. Further, since the groove portion also has a function of accommodating the holding portion, the space for accommodating the separate holding portion can be omitted in the socket main body, and thus the size of the socket can be prevented from becoming large.

In the above socket, an elastic member may be disposed at least one of the shutter main body and the socket main body so as to surround the plug piece insertion hole, wherein when the shutter main body is in a closed state, the elastic member is contacted in a compressed state in the socket main body. The surrounding part of the plug socket.

In the above structure, when the shutter main body is in the closed state, since the elastic member is in close contact with the socket main body, the plug piece insertion hole can be properly sealed by the shutter main body. Therefore, when the plug is not inserted into the socket, the waterproof performance of the socket can be improved.

In the above socket, when the shutter body is in the closed state, the holding portion can be blocked by contacting the entire surrounding portion around the plug socket. Head chip jack.

In the above structure, when the shutter main body is in the closed state, if the holding portion contacts the periphery of the plug socket, the claw will perform the function as the cover of the plug jack. Therefore, when the plug is not inserted into the socket, the waterproof performance of the socket can be improved.

The present invention provides a socket device comprising: a main body having a plug piece jack on a surface thereof for inserting a plug piece of a plug; a plug piece receiving portion for contacting the plug piece and maintaining the plug piece inserted into the plug piece jack; Used to contact a power source; a switch arranged in a circuit between the receiving portion of the blade and the terminal; a position detecting unit for detecting the position of the plug; and a controller ( The controller is configured to control the switch according to the detection result of the position detecting unit, wherein the controller comprises: a determining unit, configured to determine whether the plug piece of the plug receives the plug piece according to the detecting result of the position detecting unit Partial contact and whether the position of the plug is within a prescribed range, the specified range means that the distance between the surface of the main body and the plug is less than a predetermined distance; and the switching control unit, when the position of the plug is determined to be within a prescribed range The internal time is used to close the switch, and is used to open the switch when it is determined that the position of the plug is not within the prescribed range.

In the above structure, if the plug piece of the plug contacts the receiving portion of the plug piece and the position of the plug is within a prescribed range (the distance between a surface of the main body and the plug is less than a predetermined distance), the current is at the receiving portion and the terminal of the plug piece The flow is between, and if the position of the plug is outside the specified range, the current between the receiving portion of the plug piece and the terminal is cut off. So when the plug of the plug is When the receiving portion of the plug piece is in contact, or when the plug piece of the plug is separated from the receiving part of the plug piece, no power is supplied to the receiving portion of the plug piece, so when the plug piece of the plug is inserted into the receiving portion of the plug piece and when the plug piece of the plug is pulled out of the plug At the receiving portion of the sheet, no arc discharge occurs between the plug piece and the receiving portion of the plug piece. Therefore, when the plug piece of the plug is inserted into the receiving portion of the plug piece and when the plug piece of the plug is pulled out of the receiving portion of the plug piece, arc discharge can be prevented from occurring, so that it can be safely used even in a place where a combustible gas or the like is used. Socket device. Also, since the plug receiving portion can be prevented from being damaged due to the arc discharge, the life of the plug receiving portion can be extended.

The above described features and advantages of the present invention will be more apparent from the following description.

(First Embodiment)

The socket according to the first embodiment of the present invention is an outdoor socket attached to an outer wall of a building such as a house, which will be described in detail below with reference to Figs. 1 to 8B.

As shown in FIG. 1, the outdoor socket 1 is attached to the wall surface of the outer wall, and includes: a socket main body 2 having a plug piece insertion hole 21a for inserting the plug piece 5a of the plug 5 (refer to FIGS. 7A and 7B) (refer to the figure). 2); a shutter main body 3 for opening and closing the plug insertion hole; and a rotation device 4 mounted to the shutter main body 3 and for performing opening and closing operations of the shutter main body 3.

Hereinafter, the direction perpendicular to the wall surface is referred to as "front and rear direction", and the direction of retreating from the wall surface is referred to as "front", and the direction toward the wall surface is advanced. The direction is called "after". Further, the direction in which the plug piece 5a of the plug 5 is inserted into the blade insertion hole 21a is referred to as "insertion direction".

A body 10 as a base is attached to the socket body 2. An outlet block 20 having a blade insertion hole 21a is attached to the main body 10. A waterproof packing 30 is attached to the main body 10 at the rear of the front and rear directions of the socket block 20. An attachment body 40 is attached to the rear of the waterproof package 30 in the front-rear direction for fixing the outdoor socket 1 to the wall surface when attached to the wall surface. Further, a cover body 50 is attached to the front side of the main body 10 in the front-rear direction.

A frame body 11 for attaching the frame shape of the waterproof package 30 is attached to the main body 10. Above the vertical direction of the frame main body 11, a cover 12 that protrudes forward in the front-rear direction and has a circular arc shape in a side view is attached. In the vertical direction of the side surface of the cover 12, when the vehicle is advanced rearward in the front-rear direction, the lower end portion 12b is inclined downward in the vertical direction.

An outlet case 21 for forming an outer frame of the socket block 20 is mounted to the socket block 20. In the socket housing 21, a plug piece holder 22 (see FIG. 2) for accommodating the plug piece 5a of the plug 5, and a lock spring for maintaining an electric wire taken from the wall surface are accommodated (unpainted) And a release button (not shown) for releasing the lock spring.

In the socket housing 21, a blade insertion hole 21a formed in the insertion surface 21g of the plug piece 5a of the plug 5 is mounted, and an electric wire insertion hole for inserting an electric wire into the lock spring is mounted. Further, a body attaching portion 21c attached to the main body 10 by a bolt is attached to Socket housing 21.

As described above, the waterproof package 30 is an elastic member attached to the rear of the frame main body 11 in the front-rear direction. The waterproof package 30 brings the wall surface into close contact with the main body 10, thereby preventing water (for example, rain water) from penetrating into the outdoor socket 1 via the space between the waterproof package 30 and the wall surface. In the waterproof package 30, a stepped fitting portion 31 for fitting the frame main body 11 of the main body 10 and a front insertion portion 32 for mounting the wall are attached. The electrical leads carried by the surface are inserted into the penetration holes of the socket block 20.

The attachment body 40 is housed in the waterproof package 30. In the attachment body 40, an attachment portion 41 attached to the wall surface by a bolt (not shown) is mounted, and an insertion portion (rear) for inserting the electric wire into the front insertion portion 32 and the socket block 20 is installed. Insertion portion)42.

The shutter main body 3 includes a shutter main body main body 60 having a substantially flat shape and a holding portion 70 attached to the main body 60 of the shutter. The shutter main body 60 is disposed below the vertical direction of the cover 12 and opens and closes a portion of the cover 12 at the lower end in the vertical direction.

The rotary member 4 is in contact with the lower end of the waterproof package 30 in its vertical direction. The rotary member 4 includes: a shaft 80 as a center of rotation of the shutter main body 3; a spring member 81 for inserting and passing through the shaft center 80; and a shaft member 80 and a spring member 81 for holding Holding member 90. The spring member 81 of the present embodiment uses a torsion spring.

Next, the internal structure of the outdoor socket 1 will be explained with reference to FIG.

As shown in FIG. 2, the socket block 20 is disposed further forward than the frame main body 11 of the main body 10 in the front-rear direction, and is housed in the cover 12. A part of the socket block 20 is inserted into an insertion port 12a which is a through hole which is attached to the lower side of the cover 12 in the vertical direction. In particular, in a state where the convex shaped engaging portion 21d of the entire circumference of the side surface of the socket housing 21 mounted on the socket block 20 is in contact with the periphery of the insertion cassette 12a, if the engaging portion 21d of the socket housing 21 is The insertion portion 21e of the front end thereof is inserted into the insertion cassette 12a, and the socket block 20 is disposed on the cover 12.

Further, when the vehicle is advanced in the front-rear direction, the insertion 埠 12a is inclined upward in the vertical direction. Therefore, when pushing downward in the vertical direction, the shape of the socket block 20 is inclined forward in the front-rear direction and adhered to the cover 12. In the socket housing 21, the blade insertion hole 21a is formed on the bottom surface 21f1, and the bottom surface 21f1 corresponds to the surface of the insertion pocket 12a. When the cymbal 12a is inserted, the blade insertion hole 21a is inclined upward in the vertical direction when it is advanced in the front-rear direction.

Further, the rotary member 4 is mounted adjacent to the insertion bore 12a below the vertical direction of the insertion bore 12a. The shutter main body 3 is attached to the rotary member 4.

When the plug 5 (see FIGS. 7A and 7B) is not inserted into the blade insertion hole 21a, the rotary member 4 covers the operation shutter main body 3 from the lower side of the vertical direction to the insertion pocket 12a (insertion surface 21g) (hereinafter, the shutter body 3 is vertical The state in which the lower side of the direction is covered by the insertion 埠12a is referred to as "closed state". In particular, when the shutter body 3 is in the closed state, the shutter body 3 will be in the insertion direction The front surface 12A side (i.e., the surface side of the insertion surface 21g) covers the blade insertion hole 21a, and the insertion direction means the direction in which the plug 5 is inserted into the outdoor socket 1 in the insertion cassette 12a (insertion surface 21g).

When the plug 5 is inserted into the blade insertion hole 21a in the closed state, the rotary member 4 disengages the operation shutter main body 3 from the lower side in the vertical direction of the insertion cassette 12a (insertion surface 21g) into the insertion port 12a (the blade insertion hole 21a) (below) The state in which the shutter main body 3 is disengaged from the cymbal 12a is referred to as "open state".

The frame main body 11 of the main body 10 is in contact with the waterproof package 30 at the rear in the front-rear direction. The outer size of the waterproof package 30 is almost equal to the outer size of the frame body 11. The attachment body 40 is in contact with the waterproof package 30 from the rear in the front-rear direction. The outer size of the attachment main body 40 is smaller than the outer size of the waterproof package 30, and the attachment main body 40 is housed in the peripheral wall 33 mounted rearward in the front-rear direction of the waterproof package 30.

A bolt insertion portion 11a is a through hole for inserting a bolt for fixing to a wall surface, and is attached to the frame main body 11 of the main body 10. In the waterproof package 30, the insertion portion 34 is a through hole for inserting and passing through the bolt insertion portion 11a and is mounted at a position corresponding to the bolt insertion portion 11a. In the attachment main body 40, the bolt insertion portion 43 is a through hole that is connected to the through hole of the bolt insertion portion 11a and is installed at a position corresponding to each of the bolt insertion portion 11a and the insertion portion 34. Thereby, when inserted between the main body 10 and the wall surface, the waterproof package 30 and the attachment main body 40 can maintain their positions in the front-rear direction.

Also, the shape of the cover main body 50 covers the cover 12 from the cover 12 to the lower side in the vertical direction. In particular, the front surface of the cover body 50 in the front-rear direction The shape of 51 extends to a position lower than the front surface 12A of the front and rear direction of the cover 12 in the vertical direction. When advancing toward the rear in the front-rear direction, the shape of the side surface 52 of the cover main body 50 extends below the vertical direction. In particular, when advancing toward the rear in the front-rear direction, the shape of the cover 12 is increased so that the number extending downward in the vertical direction of the side surface 52 is increased. The size of the side surface 52 in the vertical direction when contacting the frame main body 11 of the main body 10 is almost equal to the size of the frame main body 11.

Next, the detailed structure of the shutter main body 3 will be described with reference to Figs. 3A to 3C. In FIGS. 3A to 3C, in a state where the shutter main body 3 is attached to the main body 10, a direction perpendicular to the front-rear direction is referred to as a "longitudinal direction".

As shown in FIG. 3A, in the shutter main body 60 of the shutter main body 3, a shaft insertion portion 61 which is substantially cylindrical and is inserted into the shaft center 80 of the rotary member 4 is mounted rearward in the front-rear direction. And the grip portion 62 of the shutter main body 3 is rotated by the user's hand in front of the front-rear direction. Further, the peripheral wall 63 protrudes toward the insertion port 12a (see FIG. 2), that is, is mounted on the periphery of the main body 60 of the shutter in the vertical direction. The peripheral wall 63 is attached to the entire length of each side on both sides of the side surface portions in the longitudinal direction of the main body 60 of the shutter and on the front side in the front-rear direction.

As shown in FIG. 3C, the shape of the grip portion 62 is protruded downward from the main body 60 of the shutter in the vertical direction. In particular, a protruding portion 62a and a rib 62b are attached to the grip portion 62, and if the main body main body 60 is advanced forward in the front-rear direction, the mounting projection 62a protrudes downward in the vertical direction, and the rib 62b Mounted on the protruding portion 62a Both side portions of the length direction are used to reinforce the protruding portion 62a. The rib 62b is formed in the entire vertical direction of the protruding portion 62a, and if the lower end portion of the protruding portion 62a in the vertical direction is advanced toward the shutter main body 60, the width from the protruding portion 62a in the front-rear direction Increment.

Further, in the end portion below the vertical direction of the protruding portion 62a, a projection 62c projecting forward from the end portion in the front-rear direction is formed. The projection 62c is formed over the entire length direction of the protruding portion 62a. The user's finger can easily hold the projection 62c.

As shown in FIG. 3B, the front holding portion 70 in the front-rear direction is integrated into the shutter main body 60. The holding portion 70 includes a three-pronged button 71 disposed at a predetermined distance in the longitudinal direction and a connecting portion 72 for connecting the claw catch 71.

In the claw-claw 71, the inclined portion 71a which is inclined upward in the vertical direction when advancing rearward in the front-rear direction is formed in the front-rear direction, and the tip end portion having the inclined portion 71a is formed in the rear side in the front-rear direction. The end portion 71b of the step shape below the vertical direction. In the end portion 71b, a first surface 71b1 which is a surface extending downward from the tip end portion of the inclined portion 71a and a second surface 71b2, and the second surface 71b2 is formed by the first surface 71b1 The surface of the lower end portion in the vertical direction extends rearward in the front-rear direction. Further, the connecting portion 72 is connected to the rear end portion of the claw catch 71 in the front-rear direction when extending in the longitudinal direction.

Next, a state in which the shutter main body 3 of the plug insertion hole 21a is inserted according to whether the plug piece 5a of the plug 5 is inserted will be described with reference to Figs. 2 and 4 to 7B.

First, when the blade piece 5a of the plug 5 is not inserted into the blade insertion hole 21a, that is, when the shutter body 3 is in the closed state, the shutter body 3 will be described with reference to Figs. 2 and 4 to 5B.

As shown in FIG. 4, the shutter main body 60 of the shutter main body 3 covers the entire surface of the blade insertion hole 21a from the lower side in the vertical direction. That is, the outer size of the main body 60 of the shutter is larger than the plug insertion hole 21a. In particular, as shown in Fig. 2, in the peripheral wall 63 of the shutter main body 60, the entire surface of the surface opposite to the insertion opening 12a of the cover 12 is in contact with the periphery of the insertion pocket 12a. In this state, the spring member 81 (see Fig. 1) will exert a force that biases the peripheral wall 63 toward the periphery of the insertion bore 12a. Therefore, for example, when the shutter main body 3 is rotated downward in the vertical direction by its own weight, a space is formed between the peripheral wall 63 and the periphery of the insertion pocket 12a.

Further, in the insertion surface 21g of the socket housing 21, the recess 21f having a circular flat surface is recessed inward in the insertion direction of the plug piece 5a of the plug 5, that is, in the upper direction in the vertical direction of Fig. 2 is formed. The groove 21f includes a bottom surface 21f1 for forming the blade insertion hole 21a and a side surface 21f2 extending to the front side of the insertion direction (that is, below the vertical direction) and surrounding the periphery of the bottom surface 21f1. A part of the plug housing 5b (see Fig. 7B) of the plug 5 is inserted into the recess 21f.

However, as described above, when the holding portion 70 is attached to the shutter main body 60 of the shutter main body 3, the receiving portion of the holding portion 70 must be mounted on the side of the socket main body 2. That is, if the receiving portion of the holding portion 70 is not mounted on the side of the socket main body 2, the holding portion 70 is first brought into contact with the socket housing 21 before the peripheral wall 63 comes into contact with the periphery of the insertion cassette 12a, and thus the peripheral wall 63 is A space is formed between the insertion turns 12a. As a result, the waterproof performance of the outdoor outlet 1 may deteriorate. When the receiving portion of the holding portion 70 is attached to the socket main body 2 side, if a dedicated structure for accommodating only the holding portion 70 is formed, the shape of the socket main body 2 becomes complicated and the size of the socket main body 2 becomes large.

In view of this, in the present embodiment, the holding portion 70 is housed in the recess 21f disposed in the socket housing 21. In particular, when a space is formed between the holding portion 70 and the bottom surface 21f1, the holding portion 70 is housed in the groove 21f to avoid contact between the holding portion 70 and the bottom surface 21f1. Therefore, the peripheral wall 63 can maintain a good contact state with the periphery of the insertion bore 12a.

Further, since the recess 21f allows a part of the plug housing 5b inserted into the plug 5 to accommodate the holding portion 70 at the same time, the socket main body 2 can be formed into a simple shape as compared with the configuration having the dedicated portion for accommodating only the holding portion 70 as described above. Moreover, the size of the socket main body 2 can be prevented from becoming large.

However, in general, when the shutter body for covering the plug socket is formed to be opened and closed, the user opens the shutter body for inserting the plug and may forget to close the shutter body after the plug is pulled out. In this case, for example, if the vehicle is cleaned near an outdoor outlet, the water of the cleaning vehicle may seep into the plug socket.

In view of this, in the present embodiment, by attaching the spring member 81 to the rotary member 4, the shutter main body 3 can always be biased toward the insertion pocket 12a, so that the above problem can be avoided when the user forgets to close the shutter main body 3.

Further, as shown in FIGS. 5A and 5B, when the shutter main body 3 is in contact with the insertion cassette 12a, the projection 62c and the lower end portion of the projection portion 62a of the shutter main body 3 in the vertical direction are vertically oriented by the cover main body 50. Highlighted below. Therefore, even when the shutter main body 3 is in contact with the insertion cassette 12a, the user's finger can buckle the projection 62c and the shutter main body 3 can be easily opened.

Next, when the blade 5a of the plug 5 is being inserted into the blade insertion hole 21a, the shutter body 3 will be explained with reference to Figs. 6 to 7B.

As shown in Fig. 6, when the plug piece 5a of the plug 5 is inserted into the blade insertion hole 21a, the shutter body 3 will make the peripheral wall in a state where the peripheral wall 63 shown in Figs. 4 to 5B is in contact with the periphery of the insertion pocket 12a. 63 is detached from the periphery of the cymbal 12a. In particular, the user's finger (not shown) catches the projection 62c, and the shutter main body 3 moves downward in the vertical direction. At this time, the shutter main body 3 rotates downward about the axis 80 in the vertical direction. Here, the blade insertion hole 21a includes a substantially rectangular power terminal insertion slot for inserting a pair of power terminals 5a1 (see FIGS. 7A and 7B) of the blade 5a of the plug 5. 21a2 and a substantially semicircular ground terminal insertion slot 21a3 for inserting a ground terminal 5a2 (see FIGS. 7A and 7B) of the plug piece 5a of the plug 5.

However, in such a rotary shutter main body, a structure in which a rotary element is mounted on the cover side can be considered. In this configuration, since the projection formed on the shutter main body is disposed rearward in the front-rear direction, the shutter main body is rotated downward in the vertical direction while advancing forward from the rear in the front-rear direction. In such an operation of the shutter main body, since the plug should be inserted from the position in the front-rear direction more than the position of the shutter main body, it is difficult to insert the plug while maintaining the rotation state of the shutter main body.

In this regard, in the present embodiment, since the rotary member 4 is attached to the frame main body 11 and the projection 62c of the shutter main body 60 is formed in the front-rear direction, the shutter main body 3 is rotated downward in the vertical direction while being in the front-rear direction. Push forward in the front. Therefore, since the plug 5 can be inserted into the blade insertion hole 21a from the front in the front-rear direction in the shutter main body 3, the plug 5 can be easily inserted into the blade insertion hole 21a.

Also, as shown in FIG. 7A, when the shutter main body 60 overlaps with the plug housing 5b of the outer frame for forming the plug 5, the finger holding the position of the main body 60 of the shutter can be removed (in particular, the projection 62c is held) finger). In this case, the shutter main body 60 is rotated toward the insertion bore 12a (see Fig. 2) by the operation of the restoring force of the spring member 81 (refer to Fig. 1). That is, the main body 60 of the shutter rotates upward in the vertical direction while advancing toward the front from the rear in the front-rear direction. In particular, in Fig. 7A, the state in which the holding portion 70 (or the shutter main body 60) is in contact with the plug housing 5b is maintained. Also, in the present embodiment, the plug housing 5b of the plug 5 is substantially cylindrical in shape.

In the above state, when the plug 5 is inserted into the inside of the insertion direction, the shutter main body 60 is rotated downward in the vertical direction while being pushed forward from the main body 60 of the shutter by the inclined portion 71a of the holding portion 70 toward the rear in the front-rear direction. The amount of protrusion of the inclined portion 71a. As shown in Fig. 7B, when the top surface 71a1 of the inclined portion 71a comes into contact with the plug housing 5b, the shutter main body 60 is no longer rotated unless the front-rear direction of the plug housing 5b is changed.

Finally, when the plug piece 5a of the plug 5 is completely inserted into the blade insertion hole 21a, the shutter body 3 will be explained with reference to Figs. 8A to 9 .

The blade holder 22 housed in the socket block 20 is mounted to correspond to each of the blade pieces 5a of the plug 5. In particular, the blade holder 22 includes a power supply side blade holder for inserting each of the pair of power terminals 5a1 of the blade 5a from both sides of the power terminal 5a1, and for inserting the blade 5a from both sides of the ground terminal 5a2. The ground side plug piece holder of the ground terminal 5a2. Each of the power supply side blade holder and the ground side blade holder is elastically deformed when the power terminal 5a1 and the ground terminal 5a2 are inserted. The power supply side blade holder and the ground side blade holder maintain each of the power terminal 5a1 and the ground terminal 5a2 by the restoring force caused by the elastic deformation.

However, according to the Japanese Patent Application Laid-Open No. 2001-185289, after the plug is connected to the socket, the plug is rotated by a predetermined angle, and the projection of the blade holder formed in the socket is inserted into the blade formed on the plug. In the structure of the transmission hole to prevent the plug from being pulled out of the socket, the elastic deformation amount of the plug piece bracket is increased, and if the elastic deformation of the plug piece holder is repeated, the elasticity of the plug piece holder is deteriorated, and thus the protrusion of the plug piece holder is further It is also impossible to insert the transfer hole of the blade. As a result, if the plug-in function of the plug is deteriorated, the pull-out plug function cannot be performed when the plug is inserted and removed.

In view of this, in the present embodiment, since the detachable plug member is not attached to the structure between the plug and the blade holder, that is, the structure of opening and closing the entire blade insertion hole 21a by the rotation of the shutter main body 3 Therefore, the elastic deformation of the blade holder 22 caused by the blade 5a of the plug 5 can be prevented, and thus the function of the tamper-proof plug as in the Japanese Patent Laid-Open Publication No. 2001-185289 can be prevented from deteriorating.

According to the rotation of the plug shown in Japanese Patent Application Laid-Open No. 2001-185289, the projection of the plug blade holder disposed in the socket is inserted into the transmission hole of the plug piece of the plug, after the plug is connected to the socket. In the structure in which the plug is pulled out from the socket, the user may forget to rotate the plug by a predetermined angle. As a result, when the plug is pulled out, the operation of the electric component may be accidentally stopped, or when the contact area between the plug piece of the plug and the blade holder is reduced, the contact resistance will increase and heat may be generated.

In view of this, in the present embodiment, when the spring member 81 inserts the plug piece 5a of the plug 5 into the blade insertion hole 21a, the holding portion 70 automatically fixes the plug 5, thereby preventing the plug from being pulled out.

In particular, as shown in Fig. 8A, when the plug piece 5a of the plug 5 is inserted into the blade insertion hole 21a, the end portion 71b of the holding portion 70 will contact the front surface 5d (see Fig. 7B) in which the plug piece 5a is mounted to the plug housing 5b. And the rear surface 5c is a surface on the opposite side to the insertion direction. Therefore, the defining plug 5 can only move forward in the insertion direction.

In particular, as shown in Fig. 8B, the rear surface 5c of the plug housing 5b is in contact with the first surface 71b1 of the end portion 71b. Further, in the central claw catch 71 of the three-claw, the rear surface 5c of the plug housing 5b is in contact with the first surface 71b1 thereof, and the side surface 5e of the plug housing 5b is in contact with the second surface 71b2 thereof.

However, at the point in time when the plug piece 5a of the plug 5 comes into contact with the blade piece holder of the socket housing 21, the plug piece 5a is supplied via the plug piece holder. At this time, if the user's hand touches the plug piece 5a, the user may be subjected to electric shock. Also, when the blade piece 5a is not fully inserted into the blade insertion hole 21a, the blade piece 5a will be exposed to the outside, and thus the user's hand may come into contact with the blade piece 5a.

In this regard, in the present embodiment, the recess 21f is formed in the socket housing 21, and the plug housing 5b is inserted into the recess 21f. Therefore, when the plug piece 5a of the plug 5 is inserted into the blade insertion hole 21a, the blade piece 5a is inserted into the recess 21f, and the periphery of the plug case 5b and the recess 21f makes the space between the outside of the communication plug 5 and the blade 5a small. . As a result, the finger of the user can be prevented from contacting the plug piece 5a via this space.

In particular, as shown in Fig. 9, when the plug piece 5a of the plug 5 is inserted into the blade insertion hole 21a, the side surface 5e for connecting the front surface 5d and the rear surface 5c of the plug housing 5b will approach the side surface of the recess 21f. 21f2. This configuration prevents the finger of the user from coming into contact with the blade 5a via the space between the side surface 5e of the plug housing 5b and the side surface 21f2 of the recess 21f. Further, even if the blade piece 5a is not fully inserted into the blade insertion hole 21a, the side surface 21f2 of the recess 21f and the side surface 5e of the plug housing 5b will partially overlap, thereby preventing the blade piece 5a from being exposed to the outside. Therefore, the user's finger can be prevented from coming into contact with the plug piece 5a.

Further, when the plug 5 is pulled out while the plug piece 5a is inserted into the blade insertion hole 21a, the shutter main body 3 is rotated downward in the vertical direction while advancing backward in the front-rear direction, at the end portion 71b and the plug housing 5b. In a state where the rear surface 5c is separated, the plug 5 is pulled straight forward of the insertion direction thereof. Therefore, the end portion 71b and the rear surface 5c of the plug housing 5b can be easily separated, and the plug-out operation of the plug 5 can be easily performed.

The socket according to the embodiment can have the following advantages.

(1) According to the present embodiment, when the plug piece 5a of the plug 5 is inserted into the plug piece insertion hole 21a, the holding portion 70 of the shutter main body 3 keeps the plug piece 5a inserted into the plug piece insertion hole 21a. Therefore, in comparison with the structure in which the pull-proof plug member is mounted between the conventional plug blade and the plug blade holder (as in Japanese Patent Application Laid-Open No. 2001-185289), in the present embodiment, since the plug blade bracket is not excessive The ground is elastically deformed, so that the number of times the plug piece 5a of the plug 5 is inserted into and withdrawn from the blade insertion hole 21a is increased, and the elasticity of the blade holder can be prevented from deteriorating. Therefore, even if the plug 5 is inserted into the outdoor socket 1 and the number of times the plug 5 is pulled out of the outdoor socket 1 is increased, the state in which the blade 5a is inserted into the blade insertion hole 21a can be maintained.

Further, since the shutter main body 3 performs an operation of opening and closing the entire blade insertion hole 21a, when the plug 5 is not inserted into the outdoor socket 1, the shutter main body 3 is maintained in a closed state, thereby preventing water from penetrating into the blade insertion hole 21a. That is, the shutter main body 3 has a function of maintaining the state in which the plug piece 5a of the plug 5 is inserted into the plug piece insertion hole 21a and a function of preventing water from penetrating into the plug piece insertion hole 21a. Therefore, the number of components of the outdoor socket 1 can be reduced and the size of the outdoor socket 1 can be prevented from becoming larger than the structure in which the holding portion is formed by the shutter main body 3 and another member.

(2) According to an embodiment of the present invention, the end portion 71b is attached to the holding portion 70, which is a contact portion that comes into contact with the rear surface 5c of the plug housing 5b. Therefore, the plug 5 can be prevented from moving forward in the insertion direction thereof, and the plug piece 5a of the plug 5 can be prevented from moving in the direction in which the plug is pulled out from the blade insertion hole 21a. Therefore, the plug 5 can be prevented from being pulled out by the outdoor socket 1.

Also, since the end portion 71b is in contact with the rear surface 5c of the plug housing 5b, it is not necessary to form a portion in the plug housing 5b for contacting the end portion 71b. Therefore, the plug housing 5b can be of a simple shape. Also, if a portion for contacting the end portion 71b is formed in the plug housing 5b, the plug housing 5b must have a unique shape. That is, the plug 5 must be a dedicated part of the outdoor socket 1. In view of this, in the present embodiment, even if the plug 5 is a general-purpose part, the end portion 71b can still perform the function of preventing the plug 5 from being pulled out by the outdoor socket 1.

Also, when a portion for contacting the end portion 71b is formed in the plug housing 5b, particularly when a projection for contacting the end portion 71b is formed, if the vehicle passes over the plug housing 5b or the user steps on the plug housing 5b, Then the bumps may be damaged. As a result, the function of preventing the plug 5 from being pulled out by the outdoor outlet 1 cannot be performed. In view of this, in the present embodiment, since the holding portion 70 is attached to the shutter main body 3, even if the vehicle passes over the plug 5 or the user steps on the plug 5, the function of preventing the plug 5 from being pulled out by the outdoor socket 1 can be performed.

(3) According to the present embodiment, when the front side is pushed forward from the front-rear direction, the inclined portion 71a in which the amount of protrusion from the main body 60 of the shutter is increased is formed in the holding portion 70. Therefore, if the inclined portion 71a is formed in an inclined shape, when the shutter main body 3 comes into contact with the inclined portion 71a, the insertion of the plug 5 will rotate the shutter main body 3. Therefore, the inclined portion 71a can prevent the insertion barrier of the plug piece 5a of the plug 5. As a result, when the plug piece 5a of the plug 5 is inserted into the blade insertion hole 21a, the insertion direction displacement of the plug 5 to the holding portion 70 can be smoothly performed. Therefore, the plug 5 can be easily inserted into the outdoor socket 1.

(4) According to the present embodiment, the spring member 81 is attached to the rotary member 4, which is an offset unit for biasing the shutter main body 3 toward the blade insertion hole 21a, and the spring member 81 is biased to the holding portion 70 to maintain the plug housing 5b. Contact status. Therefore, in a state where the plug 5 is inserted into the outdoor socket 1, the spring member 81 can bias the holding portion 70 toward the plug housing 5b even if the holding portion 70 attempts to disengage from the plug housing 5b due to an external collision. Therefore, when the holding portion 70 is disengaged from the plug housing 5b, the plug piece 5a of the plug 5 can be prevented from being pulled out by the blade insertion hole 21a.

(5) According to the present embodiment, when the blade piece 5a of the plug 5 is not inserted into the blade insertion hole 21a, the shutter body 3 has a structure in which the spring member 81 is biased to maintain the closed state of the blade insertion hole 21a. Therefore, since the shutter main body 3 is maintained in the closed state by the operation of the spring member 81, the problem caused by forgetting to close the shutter main body 3 can be avoided after the shutter main body 3 is opened. Therefore, in a state where the plug 5 is not inserted into the outdoor socket 1, water or the like can be reduced from penetrating into the blade insertion hole 21a.

(6) According to the present embodiment, the shape of the end portion 71b is substantially "L" shaped, in contact with the plug 5 and extending from the inclined portion 71a to the inner side of the inclined portion 71a in the insertion direction. Therefore, if the shape of the end portion 71b is substantially "L"-shaped, when the inclined portion 71a guides the rear surface 5c of the plug housing 5b of the plug 5 to a position corresponding to the end portion 71b, the shutter main body 3 will be by the spring The member 81 is rotated, and thus the end portion 71b is in contact with the rear surface 5c of the plug housing 5b. Therefore, by inserting the plug 5 into the outdoor socket 1 by the operation of the spring member 81, the plug piece 5a of the plug 5 can be prevented from being pulled out by the blade insertion hole 21a.

(7) According to the present embodiment, when the plug piece 5a of the plug 5 is inserted into the blade insertion hole 21a, the shutter main body 3 covers the lower side of the side surface of the plug housing 5b of the plug 5 in the vertical direction. Therefore, in a state where the plug piece 5a of the plug 5 is inserted into the blade insertion hole 21a, water can be prevented from penetrating downward in the vertical direction of the side surface of the plug housing 5b. Therefore, the waterproof performance of the plug 5 and the outdoor socket 1 can be improved.

(8) According to the present embodiment, when the front side in the front-rear direction advances rearward, the shutter main body 3 rotates downward about the axial center 80 in the vertical direction. Therefore, the plug 5 is inserted into the outdoor socket 1 from the front side of the shutter main body 3 in the front-rear direction. Therefore, the shutter main body 3 can easily insert the plug 5 into the outdoor outlet 1 while maintaining the open state.

(9) According to the present embodiment, when the plug piece 5a of the plug 5 is inserted into the blade insertion hole 21a, the plug 5 approaches the side surface 21f2 of the groove 21f. Therefore, when the blade 5a of the plug 5 is inserted into the blade insertion hole 21a, the finger of the user can be prevented from coming into contact with the blade 5a. Therefore, it is possible to prevent an electric shock accident that occurs when the user's finger comes into contact with the plug piece 5a.

Further, since the gap between the plug housing 5b and the side surface 21f2 of the recess 21f is small, when the plug piece 5a of the plug 5 is inserted into the plug-in jack 21a, even if the plug 5 tries to tilt, it is still due to the plug housing 5b and the recess The groove 21f is in contact to maintain the posture of the plug 5. Therefore, the operation of inserting the plug 5 into the outdoor socket 1 can be easily performed.

Further, in a state where the plug 5 is inserted into the outdoor socket 1, even if the plug 5 is attempted to be inclined due to an external collision, the posture of the plug 5 is maintained by the plug housing 5b being in contact with the side surface 21f2 of the recess 21f. Therefore, when inserting When the head casing 5b is tilted, the end portion 71b and the plug casing 5b can be prevented from being separated from each other, that is, the function of the tamper-proof plug member can be prevented from deteriorating.

(10) According to the present embodiment, when the shutter main body 3 is in the closed state, the holding portion 70 is housed in the recess 21f. Therefore, it is possible to prevent a space from being formed between the shutter main body 3 and the periphery of the insertion bore 12a of the socket main body 2. Further, since the recess 21f also functions as a space for accommodating the holding portion 70, it is not necessary to install a separate space for accommodating the holding portion 70 in the socket main body 2, and thus the size of the outdoor socket 1 can be prevented from becoming large.

(11) According to the present embodiment, the protruding portion 62a is formed in the shutter main body 60. Therefore, the shutter main body 3 can be rotated by the user's finger holding the protruding portion 62a.

Further, when the shutter main body 3 is in the closed state, the projection 62c has a structure in which the cover main body 50 protrudes downward in the vertical direction. Therefore, even when the shutter main body 3 is in the closed state, since the finger can easily hold the projection 62c, the shutter main body 3 can be easily rotated.

(12) According to the present embodiment, the cover main body 50 has a structure that covers the periphery thereof so as to surround the blade insertion hole 21a and extends the lower end portion of the cover body 50 in the vertical direction from the blade insertion hole 21a to the lower side in the vertical direction. Therefore, since water (for example, rainwater or the like) falls from the upper side of the outdoor socket 1 along the surface of the cover main body 50 below the vertical direction of the outdoor socket 1, water can be prevented from penetrating into the blade insertion hole 21a.

(13) According to the present embodiment, the peripheral wall 63 is attached to the shutter main body 60, and the peripheral wall 63 is in contact with the periphery of the insertion weir 12a in a state where the shutter main body 3 is closed. Therefore, compared to the junction of a surface of the main body 60 of the contact valve The shutter body 3 can more reliably contact the periphery of the insertion pocket 12a. As a result, the waterproof performance of the outdoor outlet 1 can be improved in a state where the plug 5 is not inserted into the outdoor socket 1.

(Second embodiment)

The socket according to the second embodiment of the present invention is an outdoor socket attached to the outer wall of a building (e.g., a house), which will be described in detail below with reference to Figs. 10A and 10B. In the present embodiment, since only the shape of the holding portion of the shutter main body 3 is different from that of the first embodiment, and the same reference numerals denote the same elements, detailed description thereof will be omitted.

As shown in Fig. 10A, the holding portion 91 of the shutter main body 60 of the shutter main body 3 attached to the outdoor wall 1A is integrated in the front-rear direction of the shutter main body 60 as in the first embodiment. The holding portion 91 includes a three-claw clasp 92 disposed at a predetermined distance in the longitudinal direction and a connecting portion (not shown) for connecting the claw clasps 92. Also, the arrangement of the three-claw clasps 92 is the same as that of the first embodiment.

In the claw catch 92, a front inclined portion 93 and a rear inclined portion 94 are installed, and the shape of the front inclined portion 93 is calculated from the main body of the shutter main body 60 if it is advanced from the front in the front-rear direction. The amount of protrusion increased, and the rear inclined portion 94 is connected to the front inclined portion 93 and has a shape in which the amount of protrusion from the main body 60 of the shutter is reduced if it is advanced from the front in the front-rear direction. When the plug 5 is inserted into the outdoor socket 1A, the front inclined portion 93 will perform the function of guiding the plug 5. When the plug 5 is inserted into the outdoor socket 1A, the rear inclined portion 94 will perform a function of preventing the plug 5 from being pulled out by the outdoor socket 1A.

In particular, when the plug 5 is inserted into the outdoor socket 1A, the plug housing 5b of the plug 5 comes into contact with the front inclined portion 93. In this state, when the plug 5 is moved toward the inside in the insertion direction, the shutter main body 60 is rotated downward in the vertical direction, and thus the front inclined portion 93 is moved downward in the vertical direction. As shown in Fig. 10B, when the plug 5 is inserted into the outdoor socket 1A, the rear surface 5c of the plug housing 5b and the connecting portion 5f of the side surface 5e are in contact with the rear inclined portion 94. The component of the force moving the plug 5 toward the inside in the insertion direction is applied by the operation of the inclined portion 94 of the spring member 81. Therefore, the plug 5 can be prevented from being pulled out by the outdoor socket 1A.

However, due to manufacturing errors of the plug housing 5b, assembly errors of the plug 5, and assembly errors of the main body 10 of the outdoor socket 1A and the socket block 20, the imbalance may occur from the bottom surface 21f1 of the recess 21f of the socket housing 21 to the plug housing. The distance from the rear surface 5c (connecting portion 5f) of 5b.

In view of this, in the present embodiment, since the connecting portion 5f is in contact with the rear inclined portion 94, the degree of rotation of the shutter main body 3 can be adjusted to resolve the imbalance. In particular, when such a distance is short, the shutter main body 3 is rotated upward in the vertical direction, thereby maintaining contact between the connecting portion 5f and the rear inclined portion 94. When this distance is long, the shutter main body 3 is rotated downward in the vertical direction, thereby maintaining contact between the connecting portion 5f and the rear inclined portion 94.

According to the outdoor socket 1A of the present embodiment, in addition to the advantages (1) to (13) of the first embodiment, the following advantages can be obtained.

(14) According to the present embodiment, when the plug 5 is inserted into the outdoor socket 1A, the rear inclined portion 94 comes into contact with the connecting portion 5f of the plug housing 5b. Therefore, vertical The imbalance occurs from the bottom surface 21f1 of the recess 21f of the socket housing 21 to the rear surface 5c (connection portion 5f) of the plug housing 5b, and the contact between the rear inclined portion 94 and the connecting portion 5f can still be maintained. As a result, even if an imbalance occurs, the performance of the pull-out plug element can be prevented from deteriorating.

(Third embodiment)

The socket according to the third embodiment of the present invention is an outdoor socket attached to the outer wall of a building (e.g., a house), which will be described in detail below with reference to Figs. 11A and 11B. In the present embodiment, since only the shape of the holding portion of the shutter main body 3 is different from that of the first embodiment, and the same reference numerals denote the same elements, detailed description thereof will be omitted.

As shown in FIG. 11A, the holding portion 95 of the outdoor socket 1B is integrated in front of the front-rear direction of the main body 60 of the shutter. The holding portion 95 includes two claws 96 arranged in the longitudinal direction and a connecting portion for connecting the claws 96. Here, the side view shape of the claw catch 96 is almost the same as the side view shape of the first embodiment, and thus detailed description thereof will be omitted. Further, the width H1 of the claw buckle 96 in the longitudinal direction is larger than the width of the claw buckle 71 of the first embodiment in the longitudinal direction.

When the shutter main body 3 is in the closed state, the top surface 97 of the frame shape of each of the claw clasps 96 is in contact with the periphery of each of the power terminal insertion holes 21a2. That is, the top surface 97 contacts the periphery of the power terminal jack 21a2 in a form surrounding the power terminal jack 21a2. Therefore, even if water permeates through the gap between the shutter main body 3 and the cover 12, the penetration of water is still prevented due to the space seal between the top surface 97 and each of the power terminal insertion holes 21a2.

As shown in Fig. 11B, in a state where the shutter main body 3 is closed, when the claw catch 96 is inserted into the power terminal jack 21a2, the claw catch 96 will be in contact with the opening end 21a1 of the power terminal jack 21a2 in the longitudinal direction. . Therefore, a space is formed between the power terminal jack 21a2 and the claw catch 96 in the longitudinal direction.

According to the outdoor socket 1B of the present embodiment, in addition to the advantages (1) to (13) of the first embodiment, the following advantages can be obtained.

(15) According to the present embodiment, when the shutter main body 3 is in the closed state, the holding portion 95 is inserted into the power terminal jack 21a2. Therefore, the claw catch 96 of the holding portion 95 performs the function as a cover of the power terminal jack 21a2. Therefore, in the state where the plug 5 is not inserted into the outdoor socket 1B, the waterproof performance of the outdoor socket 1B can be improved.

In particular, in a state where the claw catch 96 is inserted into the power terminal jack 21a2, the claw catch 96 will come into contact with the open end 21a1 of the power terminal jack 21a2, thereby further preventing water from penetrating into the power terminal jack 21a2. Therefore, the waterproof performance of the outdoor socket 1B can be further improved.

Also, in the present embodiment, as in the first and second embodiments, when the shutter main body 3 is in the closed state, the peripheral wall 63 of the shutter main body 60 will come into contact with the periphery of the insertion cassette 12a. Therefore, the outdoor socket 1B has both the waterproof function provided by the contact between the peripheral wall 63 and the periphery of the insertion cassette 12a and the waterproof function provided by the claw catch 96 inserted into the power terminal insertion hole 21a2. As a result, the waterproof performance of the outdoor socket 1B can be further improved.

(amendment)

The outdoor socket according to the present invention is not limited to the above embodiment, and It can become the following correction example. Further, the following modifications are not limited to the above embodiments, but may be combined.

In the above embodiment, when the shutter main body 3 is in the closed state, if the peripheral wall 63 of the shutter main body 60 and the periphery of the insertion pocket 12a are in contact with each other, a waterproof structure that prevents water from penetrating into the plug insertion hole 21a will be formed. However, the waterproof structure of the present invention is not limited thereto. For example, as shown in FIG. 12A, in place of the peripheral wall 63 of the main body main body 60, a rubber-like compressible elastic member 98 may be attached instead of the peripheral wall 63. As shown in Fig. 12B, when the shutter body 3 is in the closed state, the compressed elastic member 98 will be inserted between the shutter main body 60 and the periphery of the insertion pocket 12a. Therefore, the adhesive force between the shutter main body 60 and the elastic member 98 and the adhesion between the elastic member 98 and the periphery of the insertion pocket 12a can be improved. That is, a gap is formed between the shutter main body 60 and the elastic member 98, and a gap is formed between the elastic member 98 and the periphery of the insertion pocket 12a. Therefore, when the shutter main body 3 is in the closed state, the waterproof performance of the outdoor outlets 1, 1A, and 1B can be improved.

Further, the elastic member 98 may be directly attached to the peripheral wall 63. Even in this configuration, the waterproof performance of the outdoor outlets 1, 1A, and 1B can be improved.

Also, the elastic member 98 can be directly attached to the periphery of the insertion cassette 12a. Even in this configuration, the waterproof performance of the outdoor outlets 1, 1A, and 1B can be improved. Also, in this case, there may be the same advantages as the structure in which the peripheral wall 63 is removed by the shutter main body 60.

In the above embodiment, the recess 21f is formed in the socket of the socket block 20. The outer casing 21, however, the recess 21f may not be formed in the socket outer casing 21. Even in this configuration, the advantages (1) to (8) and the advantages (11) to (15) of the above embodiment can be obtained.

In the above-described embodiment, the shutter main body 3 is rotated downward in the vertical direction around the axis 80 when the front side is advanced in the front-rear direction. However, the shutter main body 3 may be vertically moved forward from the rear in the front-rear direction. Rotate below. Even in this configuration, the advantages (1) to (7) and the advantages (9) to (15) of the above embodiment can be obtained.

In the above embodiment, in a state where the plug 5 is inserted into the outdoor sockets 1, 1A, and 1B, the shutter main body 3 will cover a part of the lower end of the plug housing 5b of the plug 5 in the vertical direction, but the structure of the shutter main body 3 is not limited this. For example, when both sides in the longitudinal direction of the peripheral wall 63 of the shutter main body 60 extend upward in the vertical direction, in a state where the plug 5 is inserted into the outdoor sockets 1, 1A and 1B, the shutter main body 3 can be formed to cover both sides of the plug housing 5b. The structure of the surface.

In the above embodiment, the spring member 81 is regarded as an offset unit, but other devices can also be regarded as the offset unit. For example, by attaching a magnet to the shutter main body 60 and attaching a metal piece made of a magnetic material to the periphery of the insertion hole 12a corresponding to the magnet, a structure for maintaining the closed state of the shutter main body 3 can be formed.

In the above embodiment, by the operation of the spring member 81, even when the shutter main body 3 is in the closed state, the peripheral wall 63 has a structure in which the periphery of the insertion cymbal 12a is displaced upward in the vertical direction, but it is also possible that the shutter main body 3 When in the closed state, the peripheral wall 63 is not offset from the circumference of the insertion 埠12a side. In this case, the closed state of the shutter main body 3 can be maintained by attaching the engaging portion for engaging each of the shutter main body 3 and the main body 10.

In the above embodiment, the shape of the inclined portion 71a formed is such that the amount of protrusion from the main body 60 of the shutter increases as being advanced from the front in the front-rear direction; however, the shape of the inclined portion of the present invention is not limited this. For example, instead of the inclined portion 71a, a curved portion of a curved shape in which the amount of protrusion from the main body 60 of the shutter increases as the front side in the front-rear direction is advanced can be formed.

Further, in the above embodiment, the inclined portion 71a and the front inclined portion 93 are attached to the holding portions 70, 91, and 95; however, the inclined portion 71a and the front inclined portion 93 may be omitted by the holding portions 70, 91, and 95.

In the first and third embodiments, the mounting end portion 71b serves as a contact portion; however, the shape of the contact portion of the present invention is not limited thereto. For example, a curved portion that is curved upward in the vertical direction when advancing from the rear in the front-rear direction can be formed as a contact portion.

In the third embodiment, the claw fasteners 96 are inserted into the two power terminal insertion holes 21a2 of the blade insertion hole 21a; however, the three-prong buckle 96 can also be mounted and inserted into the ground terminal insertion hole 21a3.

In the third embodiment, as in the first and second embodiments, the peripheral wall 63 of the shutter main body 60 is in contact with the periphery of the insertion weir 12a, but the peripheral wall 63 may be omitted by the shutter main body 60. In this case, although the shutter main body 60 and the periphery of the insertion cassette 12a do not contact each other, the waterproof performance of the outdoor socket 1B can be maintained.

In the third embodiment, when the shutter main body 3 is in the closed state, The claw clasp 96 is in contact with the periphery of each of the power terminal jacks 21a2 to form a waterproof structure that prevents water from penetrating into each of the power terminal jacks 21a2; however, the waterproof structure of the present invention is not limited thereto. Each of the power terminal jacks 21a2 is in contact with a portion of the pawl 96. In this case, the width H1 of the claw catch 96 is preferably almost the same as the width of each of the power terminal insertion holes 21a2. Even in this configuration, there is an advantage similar to the advantage (15) of the third embodiment.

In the above embodiment, the plug housing 5b of the plug 5 is substantially cylindrical in shape; however, the shape of the plug housing 5b is not limited thereto. For example, the shape of the plug housing 5b may be a rectangular parallelepiped shape.

In the above embodiment, the holding portions 70, 91, and 95 are integrated with the shutter main body 60, that is, the shutter main body 60 and the holding portions 70, 91, and 95 are formed in a single member; however, it is also possible that the shutter main body 60 and the holding portion 70, 91, and 95 become separate components.

In the above embodiment, the operation end portion 71b and the rear inclined portion 94 of the spring member 81 are maintained in the state of being applied to the plug housing 5b of the plug 5 and have the function of the pull-out plug; however, the pull-proof plug function of the present invention is not Limited to this. A structure in which the holding portions 70, 91, and 95 are applied to the plug housing 5b and has a pull-proof plug function can be used. Thus, for example, an engagement claw can be mounted to the retaining portion and can be used to engage the plug housing 5b.

In the above embodiment, the socket can be applied to the outdoor outlets 1, 1A and 1B; however, the socket of the present invention is not limited thereto. For example, the invention The socket can be used in an indoor socket.

(Fourth embodiment)

The socket device (hereinafter referred to as "socket") P of the present embodiment is an indoor socket that is powered by a power source AC such as a commercial alternating current (AC) power source.

In the socket P of the present embodiment, the plug 200 is used as shown in Figs. 15A to 15C. The plug 200 includes a main body 201 composed of a resin material having insulating properties. A cord 210 is pulled out from the rear end surface of the main body 201 (the right side surface of Fig. 15B). Here, the electric wire 210 is a three-strand electric wire in which three wires of the coated insulator are disposed in one insulating sleeve, and two of the three coated insulator wires are connected to the voltage electrode, and the remaining one is used for connecting the ground. electrode.

In front of the front end surface of the main body 201 (the left surface 201a of Fig. 15B), two flat plug pieces 202 and a cylindrical plug piece 203 are protruded, which are a total of three plug pieces. Here, the plug piece 202 is a plug piece of a voltage electrode, and the plug piece 203 is a plug piece of a ground electrode. In the main body 201, two plug pieces 202 are connected to one end of a wire for two coated insulators of a voltage electrode for the electric wire 210, and the plug piece 203 is connected to one of the grounding electrodes for the electric wire 210 to coat the insulator One end of the wire.

The plug 200 is widely used because of, for example, Japanese Industrial Standards (JIS) standards, and thus detailed description thereof will be omitted.

As shown in FIG. 14, the socket P has a main body 101. The main body 101 is made of, for example, a resin material having an insulating property and a rectangular parallelepiped shape. A resin molded product. Two sets of three blade insertion holes 110a, 110b and 111 are mounted on a surface 101a of the main body 101 (one surface in the thickness direction, the front surface of the board of Fig. 14). That is, the socket P of the present embodiment is a so-called double socket in which two plugs 200 can be used at the same time. The blade jacks 110a and 110b are plug jacks of the voltage electrodes, and the plug pieces 202 of the voltage electrodes of the plug 200 are inserted therein, respectively. Further, the blade insertion hole 111 is a blade insertion hole of the ground electrode, and the blade piece 203 of the ground electrode of the plug 200 is inserted therein. The main body 101 is buried in a wall surface (interior wall surface) of a house (not shown) in a state in which one surface 101a is exposed so that the socket P is mounted on the wall surface (interior wall surface) of the house.

A wire insertion hole (not shown) for inserting a wire of the power source AC is formed on the other surface (the other surface in the thickness direction) of the main body 101.

As shown in FIG. 13, the main body 101 includes a plurality of blade receiving portions 102 (two in the illustrated embodiment), a terminal 103, a plurality of switches 104 (two in the illustrated embodiment), and a plurality of Position detection unit 105 (two in the illustrated embodiment) and controller 106. Further, in the following description, the two plug piece receiving portions 102 are divided into symbols 102A and 102B as required, the two switches 104 are divided into symbols 104A and 104B as required, and the two position detecting units 105 are provided as needed. It is divided into symbols 105A and 105B.

The blade receiving portion 102 has a pair of power supply blade holders 102a and 102b that are in contact with each of the blade pieces 202 inserted into the blade jacks 110a and 110b. Each of the blade holders 102a and 102b includes a pair of plug blades 202 for clamping the blade receiving spring (blade receiving) Springs). Also, the blade receiving portion 102 includes a grounding blade bracket (not shown) that is in contact with the blade 203 inserted into the blade jack 111. The grounding plug blade bracket includes a pair of plug blades 203 for clamping the plug blade receiving spring. The shape of the blade receiving portion 102 will match the shape of the blades 202 and 203 of the plug 200 to be used. The well-known plug receiving portion can be regarded as the blade receiving portion 102, and thus detailed description thereof will be omitted.

The terminal 103 has a pair of power supply terminals 103a and 103b connected to a wire of a power source AC inserted into the wire jack. Moreover, the terminal 103 has a ground terminal (not shown) connected to the ground wire. One terminal 103a of the terminal 103 is electrically connected to one blade holder 102a of the blade receiving portions 102A and 102B, and the other terminal 103b is electrically connected to the other blade holder 102b of the blade receiving portions 102A and 102B. That is, the two blade receiving portions 102A and 102B are connected in parallel between the terminals 103a and 103b. Further, for example, the shape of the connection terminal and the well-known terminal shape of the prior art can be used for the pair of power supply terminals 103a and 103b and the ground terminal, and thus detailed description thereof will be omitted.

The switch 104 provides a control signal (telephone) for a component such as a relay and selectively switches between a closed state and an open state. In the present embodiment, the switch 104A is inserted between a blade holder 102a of the blade receiving portion 102A and a terminal 103a of the terminal 103. Further, the switch 104B is inserted between one of the blade holder 102a of the blade receiving portion 102B and one terminal 103a of the terminal 103. The switch 104 is inserted into a circuit between the blade receiving portion 102 and the terminal 103, thereby converting the electrical connection state between the blade receiving portion 102 and the terminal 103.

For example, the position detecting unit 105 is a micro switch. For example, the microswitch includes: a pair of static contact points (not shown); a dynamic contactor (not shown) having a pair of dynamic contact points for contacting and disengaging each of the pair of static contact points; (not shown) for shifting the dynamic contactor to separate the dynamic contact point from the static contact point; and a manipulation piece 105a (see FIGS. 14 and 15A) for manipulating the dynamic contactor. In the position detecting unit 105, if the pressure of the biasing spring is resisted by the predetermined amount of the operating member 105a, the pair of dynamic contact points of the dynamic contactor will respectively contact a pair of static contact points, so that the dynamic contactor can short-circuit For static touch points.

The position detecting unit 105 is configured to detect the position of the plug 200. As shown in FIG. 14, an opening 112 for guiding the manipulation member 105a of the position detecting unit 105 from the outside of the main body 101 is formed on a surface 101a of the main body 101. In the illustrated embodiment, the opening 112 is formed in an intermediate portion between the pair of blade insertion holes 110a and 110b.

Therefore, when the plug 200 is connected to the socket P, the plug 200 will press the manipulation member 105a. If the plug 200 exceeds the predetermined number by the operating member 105a, the pair of static contact points of the position detecting unit 105 will be short-circuited. Therefore, the position of the main body 201 of the plug 200 can be detected according to whether a pair of static contact points of the position detecting unit 105 are short-circuited. In the present embodiment, when the position of the plug 200 is within the prescribed range, the amount of protrusion of the operating member 105a is set to be calculated from a surface 101a of the main body 101, so that a pair of static contact points of the position detecting unit 105 are short-circuited. . Here, the prescribed range can be regarded as the range in which the plug 200 is normally connected to the socket P, and in the present embodiment, the prescribed range is inserted. The plug piece 202 of the head 200 is in contact with the blade receiving portion 102 and a distance d between a surface 101a of the main body 101 and the plug 200 (i.e., a surface 101a of the main body 101 and a front end surface 201a of the main body 201 of the plug 200) The distance between them is less than the range of the predetermined distance. In the present embodiment, the predetermined distance is the distance by which the finger cannot be inserted into the notch between the surface 101a of the main body 101 and the plug 200. Also, the distance at which the finger cannot be inserted is set to satisfy the distance of the notch required according to, for example, the installation location or the use form of the socket P. For example, if the socket P is installed in a house, the distance that the finger cannot be inserted is set to a distance that the child's finger cannot be inserted.

The controller 106 is configured to control the changeover switches 104A and 104B, and includes a measurement unit 106a and a switching controller 106b. The controller 106 is, for example, a micro-computer (microcontroller), commonly referred to as a central processing unit (CPU), in which a program stored in a memory unit is provided by a central processing unit (CPU). It is executed and provided by the measurement unit 106a and the switching controller 106b. Also, the controller 106 includes a power supply unit (not shown) that utilizes the power of the power source AC to generate its operating power and the driving power of the switch 104. Since the power supply unit obtains power from between the switch 104 and the terminal 103, the power supply unit can have power even when the switch 104 is turned on.

The measuring unit 106a monitors the potential difference between a pair of static contact points of each of the two position detecting units 105A and 105B, and determines whether a pair of static contact points are short-circuited. If a pair of static contact points are shorted, the measurement list The element 106a measures the position of the plug 200 within a predetermined range, and if a pair of static contact points are not short-circuited, the measuring unit 106a determines that the position of the plug 200 is outside the predetermined range. That is, the measuring unit 106a determines whether the position of the plug 200 is within a prescribed range of each of the position detecting units 105 based on the detection result of each of the position detecting units 105A and 105B.

The switching controller 106b outputs a control signal for each of the two switches 104A and 104B based on the measurement result of the measuring unit 106a, thereby switching the on state and the off state of each of the switches 104A and 104B. In particular, if the measurement unit 106a determines that the position of the plug 200 is within the predetermined range, the switching controller 106b turns off the switch 104 (from the on state to the off state). In this case, since the current flows between the blade receiving portion 102 and the terminal 103, the power supply AC can be supplied to the blade receiving portion 102. If the measuring unit 106a determines that the position of the plug 200 is not within the prescribed range, the switching controller 106b turns on the switch 104 (from the off state to the on state). In this case, since the connection between the blade receiving portion 102 and the terminal 103 is cut, power supply AC cannot be supplied to the blade receiving portion 102.

As described above, the socket P of the present embodiment includes the main body 101, and the main body 101 includes: the plug sockets 110a and 110b for inserting the plug piece 202 of the plug 200 on one surface 101a thereof; the plug receiving portion 102, The contact plug piece 202 and the maintenance plug piece 202 are inserted into the plug piece jacks 110a and 110b; the terminal 103 is connected to the power source AC; the switch 104 is inserted into the circuit between the plug piece receiving part 102 and the terminal 103; the position detecting unit 105, Used to detect the position of the plug 200; and the controller 106, The measuring unit 106a and the switching controller 106b are configured to control the switch 104 according to the detection result of the position detecting unit 105.

Next, the operation of the socket P of this embodiment will be described with reference to Figs. 15A to 15C. Also, since the same operation is performed even when the plug 200 is connected to any one of the two sets of the plug-in jacks of the main body 101, the following description only explains the operation of the position detecting unit 105A, and the position detecting unit 105B The description of the operation will be omitted.

When the plug 200 is not connected to the socket P, the manipulation member 105a of the position detecting unit 105A receives the pressure of the offset spring and protrudes from a surface 101a of the main body 101 as shown in Fig. 15A. In this case, a pair of static contact points of the position detecting unit 105 will be short-circuited. In this case, since the measuring unit 106a determines that the position of the plug 200 is outside the predetermined range, the switching controller 106b sets the switch 104A to the on state.

Next, if the plug pieces 202, 202, and 203 of the plug 200 are continuously inserted into the blade jacks 110a, 110b, and 111 of the socket P from the state shown in Fig. 15A, the blade piece 202 of the plug 200 will eventually contact the blade receiving portion. 102. In this case, since the switch 104A is in the on state, arc discharge does not occur between the blade piece 202 and the blade receiving portion 102.

In this state, when the plug 200 is inserted, the front end surface 201a of the main body 201 will come into contact with the manipulation member 105a of the position detecting unit 105A. When the plug 200 continues to be inserted, the manipulation member 105a of the position detecting unit 105A will move in the direction in which the dynamic contactor approaches the static contact point while resisting the pressure of the offset spring. As shown in FIG. 15B, when the manipulation member 105a is pressed by a predetermined amount At this time, a pair of static contact points of the position detecting unit 105A will be short-circuited.

In this case, since the measuring unit 106a determines that the position of the plug 200 is within the predetermined range, the switching controller 106b sets the switch 104A to the off state. Therefore, the power supply starts from the time point when the plug 200 is moved outside the prescribed range to within the prescribed range. Therefore, even if the plug piece 202 of the plug 200 comes into contact with the blade receiving portion 102, when the position of the plug 200 is outside the prescribed range, no potential energy is supplied to the blade 202. Therefore, even if the user touches the plug piece 202, the user is still not subjected to an electric shock. When the position of the plug 200 is within the specified range, power is supplied and potential energy is supplied to the plug piece 202. However, the distance d between the surface 101a of the main body 101 of the prescribed range and the plug 200 is the distance at which the finger cannot be inserted into the gap between the surface 101a of the main body 101 and the plug 200. Therefore, the user does not come into contact with the plug piece 202 and thus is not subjected to an electric shock.

Thereafter, even if the plug 200 is inserted, since the pair of static contact points of the position detecting unit 105A are short-circuited, the switch 104 is in the off state. Finally, the plug 200 is inserted to a position where the main body 201 comes into contact with the main body 101 (the front end surface 201a is in contact with a surface 101a of the main body 101), thereby completing the connection of the plug 200 to the socket P.

In the state shown in Fig. 15C, if the plug pieces 202, 202, and 203 of the plug 200 are pulled out of the blade insertion holes 110a, 110b, and 111 of the socket P, the pressure of the plug 200 against the manipulation member 105a is weakened. Therefore, in a state in which the plug 200 is slightly pulled out, the manipulation member 105a of the position detecting unit 105A can be moved to the dynamic contactor by the pressure of the offset spring without short-circuiting the pair of static contact points of the position detecting unit 105A. position.

In this procedure, when the dynamic contactor shorts a pair of static contact points of the position detecting unit 105A, the position of the plug 200 is within a prescribed range, thereby providing potential to the plug piece 202. However, as described above, the distance d between the surface 101a of the main body 101 of the prescribed range and the plug 200 is the distance at which the finger cannot be inserted into the gap between the surface 101a of the main body 101 and the plug 200. Therefore, the user does not come into contact with the plug piece 202 and thus is not subjected to an electric shock.

If the dynamic contactor does not short-circuit the pair of static contact points of the position detecting unit 105A, the measuring unit 106a determines that the position of the plug 200 is outside the predetermined range, and thus the switching controller 106b sets the switch 104A to the on state. Therefore, the power supply is stopped when the plug 200 is moved outside the predetermined range from the predetermined range. Therefore, even if the user touches the plug piece 202, the user is not subjected to an electric shock.

Thereafter, even if the plug 200 is pulled out, the connection between the pair of static contact points of the position detecting unit 105A is still cut, and thus the switch 104 is in the open state. Finally, in the plug 200, the plug piece 202 is released to a position where it does not contact the blade receiving portion 102, and thus the plug 200 is separated from the socket P. Here, when the blade piece 202 does not contact the blade receiving portion 102, the switch 104A is in an open state, and thus arc discharge does not occur between the blade piece 202 and the blade receiving portion 102.

In the socket P of the present embodiment having the above structure, the blade piece 202 of the plug 200 is in contact with the blade receiving portion 102, and when the position of the plug 200 is within a prescribed range (between a surface 101a of the main body 101 and the plug 200) When the distance d is less than the predetermined distance), the current will be at the plug receiving portion. The portion 102 flows between the terminal 103 and the terminal 103, and when the position of the plug 200 is outside the prescribed range, the current between the blade receiving portion 102 and the terminal 103 is cut off.

Therefore, when the blade piece 202 of the plug 200 comes into contact with the blade receiving portion 102, or when the blade piece 202 of the plug 200 is separated from the blade receiving portion 102, no power is supplied to the blade receiving portion 102. Therefore, when the blade piece 202 of the plug 200 is inserted into the blade receiving portion 102, or when the blade piece 202 of the plug 200 is disengaged from the blade receiving portion 102, arc discharge does not occur between the blade piece 202 and the blade receiving portion 102.

Therefore, the socket P according to the present embodiment can prevent arc discharge from occurring when the plug piece 202 of the plug 200 is inserted into the blade receiving portion 102 or when the blade piece 202 of the plug 200 is separated from the blade receiving portion 102, and thus flammability is used even when using The outlet P can also be used safely at the location of the gas. Moreover, since the loss of the blade receiving portion 102 caused by the arc discharge can be prevented, the life of the socket can be extended.

Therefore, the predetermined distance of the socket P of the present embodiment sets the distance d between a surface 101a of the main body 101 and the plug 200 (the distance between a surface 101a of the main body 101 and the front end surface 201a of the plug 200) as a finger. The distance between the notch between the surface 101a of the main body 101 and the plug 200 cannot be inserted. Therefore, when the position of the plug 200 is within the prescribed range, the finger cannot be inserted into the gap between the one surface 101a of the main body 101 and the plug 200. Therefore, when the blade piece 202 of the plug 200 is inserted into the blade receiving portion 102, or when the blade piece 202 of the plug 200 is pulled out of the blade receiving portion 102, the user's finger can be prevented from contacting the blade. 202, the user is subjected to an electric shock, so that the socket can be used safely.

Also, when a predetermined distance is set, it is preferable to set the predetermined distance to have a slight margin in consideration of the size error of each portion of the main body 101 or the plug 200. Further, when the front end surface 201a of the plug 200 comes into contact with one surface 101a of the main body 101, the measuring unit 106a sets the position of the measuring plug 200 within a predetermined range.

Further, in the present embodiment, the micro switch is used as the position detecting unit 105, but a reed switch or a proximity switch may be used as the position detecting unit 105 in addition to the micro switch.

(Fifth Embodiment)

The socket P of this embodiment is an outdoor socket for supplying power, for example, by a power source AC. Even in the socket P of the present embodiment, the plug 200 as shown in Figs. 15A to 15C can be used as in the first embodiment.

As shown in FIG. 16, the socket P of the present embodiment includes a main body 101, a plug receiving portion 102, a terminal 103, a switch 104, a position detecting unit 105, a controller 106, and an electric leakage detecting unit 107. And a test manipulation unit 108.

The main body 101 of this embodiment is formed in a sector box having a sector central angle of 90° as shown in FIG. In the main body 101, the blade insertion holes 110a, 110b, and 111 are formed on one surface 101a (the lower surface of Fig. 17) corresponding to a radius of a sector (not shown in Fig. 17) as in the fourth embodiment. However, in the main body 101 of the present embodiment, only one set of blade insertion holes 110a, 110b, and 111 are formed.

And, in the main body 101, the support portion (support The portion 113 is mounted on the other surface (the left surface of FIG. 17) corresponding to the radius of the other side of the sector. The support portion 113 has a rectangular plate shape and serves to attach the main body 101 to the wall surface W. Further, a cover 114 for waterproofing is attached to an end portion of one surface 101a of the main body 101 opposite to the side of the support portion 113. The cover 114 prevents, for example, water droplets from penetrating into the blade receiving portion 102 of the blade jacks 110a, 110b, and 111 or the charging portions of the blades 202 and 203 of the plug 200.

The blade receiving portion 102 of the present embodiment includes the blade holders 102a and 102b of the voltage electrode and the blade holder (not shown) of the ground electrode as in the fourth embodiment. Moreover, the terminal 103 of the present embodiment includes terminals (not shown) of the terminals 103a and 103b and the ground electrode, as in the fourth embodiment. The blade holder 102a and the blade holder 102b are connected to the terminal 103a and the terminal 103b, respectively.

The switch 104 of the present embodiment includes a pair of switching devices 104a and 104b. The switching elements 104a and 104b provide control signals (electric signals) to components such as relays, and are components for selectively switching between an on state and a off state. The switching element 104a is inserted between a blade carrier 102a of the blade receiving portion 102 and a terminal 103a of the terminal 103. And, the switching element 104b is inserted between the other blade holder 102b of the blade receiving portion 102A and the other terminal 103b of the terminal 103. Therefore, the switch 104 is inserted into the circuit between the blade receiving portion 102 and the terminal 103. Therefore, the electrically connectable state between the switchable piece receiving portion 102 and the terminal 103 can be switched. And, since the operation of the switching elements 104a and 104b is interlocked, the switch 104 has the switching elements 104a and 104b both turned on. One of the states of the state and the state in which the switching elements 104a and 104b are both closed.

The position detecting unit 105 of this embodiment is a micro switch as in the fourth embodiment. In the present embodiment, in the unloaded state, the position detecting unit 105 is housed in the main body 101, and thus the operating member 105a is protruded to the outside by the opening 112 disposed on a surface 101a of the main body 101. Also, in the present embodiment, the opening 112 is formed in an intermediate portion between the pair of blade insertion holes 110a and 110b.

Therefore, even in the socket P of the present embodiment, when the plug 200 is connected, the plug 200 will be pressed by the manipulation member 105a. When the plug 200 is pressed by the operating member 105a by a predetermined amount, the pair of static contact points of the position detecting unit 105 will be short-circuited. In the present embodiment, when the position of the plug 200 is within the prescribed range, as in the fourth embodiment, the pair of static contact points of the position detecting unit 105 will be short-circuited, and thus the operating member 105a is counted from a surface 101a of the main body 101. The amount of protrusion is set.

The controller 106 of this embodiment is configured to control the switching elements 104a and 104b of the switch 104, respectively, and includes the measuring unit 106a and the switching controller 106b. The measurement unit 106a and the switching controller 106b are the same as those of the fourth embodiment, and thus detailed description thereof will be omitted.

The controller 106 of the present embodiment further includes an electric leakage interception unit 106c. Also, the controller 106 is, for example, a microcomputer (a microcontroller, commonly referred to as a central processing unit (CPU)). The central processing unit (CPU) executes a program stored in the memory unit to operate the measurement unit 106a, the switching controller 106b, and the leakage cutoff unit 106c. and, The controller 106 of this embodiment includes a power supply unit (not shown) as in the fourth embodiment.

The leakage cutoff unit 106c will turn on the switch 104 when a leakage occurs. The leakage detecting unit 107 is configured to detect whether a leakage occurs. The leakage detecting unit 107 is, for example, a zero-phase comparator (ZCT). The circuit between the blade holder 102a and the terminal 103a and the circuit between the blade holder 102b and the terminal 103b are inserted into the leakage detecting unit 107. Therefore, the leakage detecting unit 107 generates a detection output based on the unbalanced current between the two circuits. The leakage cutoff unit 106c uses the detected output of the leakage detecting unit 107 (for example, whether the magnitude of the detected output exceeds a predetermined threshold) to determine whether or not leakage has occurred. If a leakage occurs, the leakage cutoff unit 106c will output a control signal to each of the switching elements 104a and 104b of the switch 104 and turn on the switch 104.

However, the socket device of the present embodiment includes a test manipulation unit 108 for performing a test operation when a leakage occurs. The test manipulation unit 108 is, for example, only a push button switch that is turned on during the manipulation. Since the leakage cutoff unit 106c monitors the control state of the test manipulation unit 108, when the test manipulation unit 108 is manipulated (when turned on), the leakage cutoff unit 106c outputs a control signal to each of the switching elements 104a and 104b of the switch 104. One and the switch 104 is turned on. Therefore, the test manipulation unit 108 determines whether the leakage cutoff unit 106c is normally operated (whether or not the leakage cutoff operation is normally performed when the leakage occurs).

As described above, in the socket P of the present embodiment, as in the fourth embodiment, if the blade piece 202 of the plug 200 is in contact with the blade receiving portion 102 and if the position of the plug 200 is within a prescribed range (a surface 101a of the main body 101) If the distance between the plug 200 and the plug 200 is less than a predetermined distance, current will flow between the blade receiving portion 102 and the terminal 103, and if the position of the plug 200 is outside the prescribed range, the blade receiving portion 102 will be cut off. Current between terminals 103. Further, as in the fourth embodiment, the predetermined distance sets the distance d between a surface 101a of the main body 101 and the plug 200 (the distance between a surface 101a of the main body 101 and the front end surface 201a of the plug 200) as a finger cannot be The distance of a gap between a surface 101a of the main body 101 and the plug 200 is inserted. Therefore, the socket P according to the present embodiment can have the same advantages as the socket P of the fourth embodiment.

In addition, since the socket P of the present embodiment includes the leakage detecting unit 107 for detecting leakage, when the leakage detecting unit 107 detects the leakage, the controller 106 controls the leakage cutting unit 106c to turn on the switch 104. Therefore, in the socket P of the present embodiment, the switch 104 is turned on when a leakage occurs, thereby electrically disconnecting the terminal 103 from the blade receiving portion 102. Therefore, it is possible to prevent electric shock, fire, or electric power damage caused by electric leakage, and thus the socket P can be used safely. Further, the leakage detecting unit 107 and the leakage cutoff unit 106c can be used for the outlet P of the fourth embodiment.

The socket P of this embodiment is used, for example, to charge an electric vehicle C as shown in FIG. Here, the electric vehicle means a vehicle in which a battery (rechargeable battery) and a motor are mounted, and includes a so-called hybrid vehicle in which an internal combustion engine (gasoline engine) and a motor are mounted, and Plug-in hybrid vehicle.

The power input socket of the power supply is installed in the electric vehicle C. The shape or structure required for the power input socket of the electric vehicle is selected according to the specifications of the battery installed in the electric vehicle C. Moreover, when the alternating current (AC) is converted into direct current (DC) and the charging element (not shown) of the rechargeable battery is mounted on the electric vehicle C, the power input socket is used to connect an alternating current (AC) power source (for example, having 50 Commercial alternating current (AC) power supply with a (Hz) or 60 Hz (Hz) frequency and a voltage of 200 volts (V).

A cord set S (hereinafter simply referred to as a "wire assembly") for charging an electric vehicle is used to charge the battery of the electric vehicle C.

The wire assembly S is a power cord assembly for connecting an outlet of an alternating current (AC) power source to a power input socket of the electric vehicle. The electric wire assembly S shown in FIG. 18 includes: an electric wire (power supply side electric wire) 210, a configuration plug 200, an electric wire (load side electric wire) 230, a connection connector 220 connected to a power input socket of the vehicle C, and a leakage current. An electric leakage interception device 240 is configured to cut off an electric circuit between the electric wire 210 and the electric wire 230 by connecting the electric wire 210 on the power supply side and the electric wire 230 on the load side when electric leakage occurs.

Also, an example shown in FIG. 18 is an example of use of the socket P, but the use of the socket P is not limited to the charging of the electric vehicle C, and the socket P can be used for other purposes (for example, an electric light installed in a park).

However, the socket P of the present embodiment is, for example, the socket shown in FIG. In Fig. 19, the upper side of Fig. 19 is defined as the upper side of the main body 101, the lower side of Fig. 19 is defined as the lower side of the main body 101, the left side of Fig. 19 is defined as the rear side of the main body 101, and the right side of Fig. 19 is defined as the main body. The front of 101.

In the socket P shown in Fig. 19, the structure of the main body 101 is different from that of the socket P of Fig. 17. Also, the other structure is similar to the other structure as shown in FIG. 17, and thus detailed description thereof will be omitted.

The main body 101 shown in Fig. 19 has a support portion 113 as shown in Fig. 17. Further, since the main body 101 shown in Fig. 19 has one surface 101a whose normal direction is inclined downward, the groove 101b is formed on a surface 101a. The groove 101b is sized to receive the front end portion of the main body 201 of the plug 200. In the bottom of the recess 101b, the blade insertion holes 110a, 110b, and 111 (not shown in Fig. 19) are formed as in the fourth embodiment. Also, a set of blade insertion holes 110a, 110b and 111 are formed in the main body 101 as shown in Fig. 19, like the main body 101 as shown in Fig. 17. Further, the opening 112 is formed at an intermediate portion between the pair of blade insertion holes 110a and 110b, and the manipulation member 105a of the position detecting unit 105 is protruded by the opening 112.

Therefore, in the socket P shown in Fig. 19, it is possible to have the same advantages as the socket shown in Fig. 17.

Also, the socket P shown in FIG. 19 includes a waterproof cover 115. The waterproof cover 115 has a rectangular plate-like flat plate portion 115a sized to cover a surface 101a of the main body 101. The flat plate portion 115a is rotatably attached to the upper end of one surface 101a of the main body 101 and uses the width direction of the main body 101 (the normal direction of the board of FIG. 19) as the rotation axis direction. Here, the rotation range of the flat plate portion 115a is between the closed position (the position indicated by the broken line in FIG. 19) covering one surface 101a of the main body 101 and the main main release. The range between the open position of one surface 101a of the body 101 (the position indicated by the solid line in Fig. 19). Also, the flat plate portion 115a is always positioned in the closed position using an offset unit such as a coil spring and subjected to the offset. In order to fix the flat plate portion 115a in the closed position, a fixing piece 116 is attached to the lower end of a surface 101a of the main body 101. The shape of the fixing member 116 is a claw shape, and when the flat plate portion 115a is positioned at the closed position, the end portion of the fixing member 116 will catch the edge of the surface of the flat plate portion 115a opposite to the side of the one surface 101a, and thus the fixing member 116 can The flat plate portion 115a is fixed in the closed position.

As described above, since the waterproof cover 115 is always positioned at the closed position, the flat plate portion 115a will cover a surface 101a of the main body 101 in a state where the plug 200 is not connected. Therefore, it is possible to surely prevent the water droplets from penetrating into the blade receiving portion 102 of the blade insertion holes 110a, 110b, and 111 or the blade pieces 202, 202, and 203 of the plug 200.

When the plug 200 is connected to the socket P as shown in FIG. 19, it is preferable to insert the plug pieces 202, 202, and 203 of the plug 200 into the blade jacks 110a, 110b, respectively, after the waterproof cover 115 is moved from the closed position to the open position. And 111. In this case, since the flat plate portion 115a is displaced in the closed position, the flat plate portion 115a will elastically contact the rear end portion of the main body 201 of the plug 200. In this state, the waterproof cover 115 performs the same function as the cover 114 as shown in FIG. That is, it is possible to prevent water droplets from penetrating into the blade receiving portion 102 of the blade insertion holes 110a, 110b, and 111 or the blades 202 and 203 of the plug 200. And, the unplugging prevention rib 115b is integrated and protruded The flat plate portion 115a of the waterproof cover 115. The pull-out plug rib 115b is for contacting the rear end surface of the main body 201 of the plug 200 connected to the socket P. Therefore, when the plug 200 is connected to the socket P, the pull-proof plug rib 115b can prevent the plug 200 from being pulled out.

In the foregoing description, the socket P according to an embodiment of the present invention has been described, however, this is only for illustration. Therefore, the present invention is not limited to the embodiments described above, and may be embodied in various forms without departing from the spirit and scope of the invention. For example, the shape of the main body 101 or the shape of the blade insertion holes 110a, 110b, and 111 may correspond to several standards (for example, Japanese Industrial Standard (JIS) C8303-1993, etc.).

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

1, 1A, 1B‧‧‧ outdoor socket

2‧‧‧Socket body

3‧‧‧The main body of the valve

4‧‧‧Rotating components

5, 200‧‧‧ plug

5a‧‧‧plug piece

5a1‧‧‧Power terminal

5a2‧‧‧ Grounding terminal

5b‧‧‧ plug housing

5c‧‧‧ rear surface of the plug housing

5d‧‧‧ front surface of the plug housing

5e‧‧‧ side surface of the plug housing

5f‧‧‧Connected section

10‧‧‧The main body of the outdoor socket

11‧‧‧Framework body

11a, 43‧‧‧ bolt insertion section

12, 114‧‧‧ cover

Front surface of the 12A‧‧‧ cover

12a‧‧‧Insert

12b‧‧‧The lower end of the side surface of the lid

20‧‧‧ socket box

21‧‧‧Socket housing

21a, 110a, 110b, 111‧‧‧ plug jack

21a1‧‧‧Open end of power terminal jack

21a2‧‧‧Power terminal jack

21a3‧‧‧Ground terminal jack

21c‧‧‧ body attachment

21d‧‧‧ joint part

21e, 34‧‧‧ Insertion

21f, 101b‧‧‧ grooves

The bottom surface of the groove of 21f1‧‧

21f2‧‧‧ side surface of the groove

21g‧‧‧ insert surface

22‧‧‧plug bracket

30‧‧‧Waterproof package

31‧‧‧Fitting part

32‧‧‧ before inserting part

33, 63‧‧‧ week wall

40‧‧‧ Attached subject

41‧‧‧ Attachment

42‧‧‧ After inserting part

50‧‧‧ Cover body

51‧‧‧ front surface of the cover body

52‧‧‧ side surface of the cover body

60‧‧‧ main body of the valve

61‧‧‧Axis insertion part

62‧‧‧ Grasping the part

62a‧‧‧ highlight

62b‧‧‧ Ribs

62c‧‧‧ bump

70, 91, 95‧‧‧ Keeping parts

71, 92, 96‧‧‧ claw buckle

71a‧‧‧ tilted section

71a1‧‧‧Top surface of the inclined part

71b‧‧‧End part

71b1‧‧‧ first surface

71b2‧‧‧ second surface

72‧‧‧Connected section

80‧‧‧Axis

81‧‧‧Spring components

90‧‧‧Retaining components

93‧‧‧Front slope

94‧‧‧ rear inclined part

97‧‧‧ top surface of the frame shape

98‧‧‧Flexible components

101‧‧‧ main body of the socket

101a‧‧‧ a surface of the main body of the socket

102, 102A, 102B‧‧‧ Plug receiving part

102a, 102b‧‧‧Power supply plug bracket

103‧‧‧terminal

103a, 103b‧‧‧Power supply terminal

104, 104A, 104B‧‧ ‧ switch

104a, 104b‧‧‧Switching components

105, 105A, 105B‧‧‧ position detection unit

105a‧‧‧Control parts of position detection unit

106‧‧‧ Controller

106a‧‧‧Measurement unit

106b‧‧‧Switching controller

106c‧‧‧Leakage cut-off unit

107‧‧‧Leakage detection unit

108‧‧‧Test control unit

112‧‧‧ openings

113‧‧‧Support section

115‧‧‧Waterproof cover

115a‧‧‧ Flat section

115b‧‧‧Protection plug ribs

116‧‧‧Fixed parts

201‧‧‧ main body of the plug

201a‧‧‧ front end surface of the plug

202‧‧‧flat plug

203‧‧‧Cylindrical inserts

210‧‧‧Power cord

220‧‧‧Connecting plug

230‧‧‧Loaded wires

240‧‧‧Leakage cutoff components

AC‧‧‧ power supply

C‧‧‧Electric vehicle

d‧‧‧Distance between the surface of the main body of the socket and the plug

H1‧‧‧ claw buckle length direction width

H2‧‧‧Power terminal jack width

P‧‧‧ socket device

S‧‧‧Wire assembly

W‧‧‧ wall surface

1 is an exploded perspective view of a socket in accordance with an embodiment of the present invention.

2 is a cross-sectional view showing a cross-sectional structure of a socket taken in a vertical direction in a socket in accordance with an embodiment of the present invention.

3A is a perspective view of a perspective structure of a shutter body of a socket in accordance with an embodiment of the present invention.

3B is a front elevational view, in elevation, of the shutter body of the socket, in accordance with an embodiment of the present invention.

3C is a valve main body of a socket according to an embodiment of the present invention. A front view of the body's front view structure.

3C is a side elevational view, in side elevation, of a shutter body of a socket, in accordance with an embodiment of the present invention.

4 is a perspective view of a perspective structure of a socket viewed from below in a vertical direction in a socket in accordance with an embodiment of the present invention.

Figure 5A is a perspective view of a perspective structure of a socket in accordance with an embodiment of the present invention.

Figure 5B is a side elevational view of a side view of a socket in accordance with an embodiment of the present invention.

Figure 6 is a perspective view showing a perspective structure of a socket viewed from below in a vertical direction in a socket in accordance with an embodiment of the present invention.

7A and 7B are side views showing a side view of a contact state between a shutter main body and a plug in a socket according to an embodiment of the present invention.

Figure 8A is a perspective view showing a perspective structure of a state in which a plug of a socket is inserted into a socket in accordance with an embodiment of the present invention.

Figure 8B is an enlarged view showing the relationship between the holding portion of the shutter main body and the rear surface of the plug housing in the socket according to an embodiment of the present invention.

Figure 9 is a cross-sectional view showing a cross-sectional structure of a socket taken in a vertical direction in a state in which a plug is inserted into a socket in accordance with an embodiment of the present invention.

Fig. 10A is a perspective view showing a perspective structure of a state in which a plug of a socket is inserted into a socket in accordance with a second embodiment of the present invention.

Figure 10B is an enlarged view showing the relationship between the holding portion of the shutter main body and the rear surface of the plug housing in a socket according to a second embodiment of the present invention. Figure.

Figure 11A is a perspective view showing a perspective structure of a socket viewed from below in a vertical direction in a socket in accordance with a third embodiment of the present invention.

Figure 11B is a cross-sectional view showing a cross-sectional structure of a socket taken in a vertical direction in a socket in accordance with a third embodiment of the present invention.

Figure 12A is a perspective view showing a perspective structure of a socket viewed from below in a vertical direction in a socket in accordance with another embodiment of the present invention.

Figure 12B is a cross-sectional view showing a cross-sectional structure of a socket taken in a vertical direction in a socket in accordance with another embodiment of the present invention.

Figure 13 is a block diagram of a socket device in accordance with a first embodiment of the present invention.

Figure 14 is a front elevational view of a socket device in accordance with a first embodiment of the present invention.

15A to 15C are schematic views showing the operation of a socket device in accordance with a first embodiment of the present invention.

Figure 16 is a block diagram of a socket device in accordance with a second embodiment of the present invention.

Figure 17 is a side elevational view of a socket device in accordance with a second embodiment of the present invention.

Figure 18 is a schematic illustration of the usage of a socket device in accordance with a second embodiment of the present invention.

Figure 19 is a side elevational view of a socket device in accordance with another embodiment of the present invention.

1‧‧‧Outdoor socket

2‧‧‧Socket body

3‧‧‧The main body of the valve

4‧‧‧Rotating components

10‧‧‧The main body of the outdoor socket

11‧‧‧Framework body

12‧‧‧ cover

12b‧‧‧The lower end of the side surface of the lid

20‧‧‧ socket box

21c‧‧‧ body attachment

21d‧‧‧ joint part

21e‧‧‧ Insertion section

30‧‧‧Waterproof package

31‧‧‧Fitting part

32‧‧‧ before inserting part

33‧‧‧Walls

34‧‧‧Insert part

40‧‧‧ Attached subject

41‧‧‧ Attachment

42‧‧‧ After inserting part

43‧‧‧Bolt insertion section

50‧‧‧ Cover body

51‧‧‧ front surface of the cover body

52‧‧‧ side surface of the cover body

60‧‧‧ main body of the valve

70‧‧‧maintaining part

80‧‧‧Axis

81‧‧‧Spring components

90‧‧‧Retaining components

Claims (11)

A socket comprising a socket body for supplying power to a plug including a plug housing, the plug housing having a surface for causing the plug blade to protrude before and a surface opposite to the front surface in an insertion direction of the plug blade, the socket body having An insertion surface, comprising a plug piece socket for inserting the plug piece of the plug, the socket comprising: a shutter body disposed on the socket body, the shutter body being coverable at the plug piece jack Switching between a closed state and an open state from the plug socket, and the shutter body has the plug blade inserted into the plug when the plug blade of the plug is inserted into the plug receptacle a retaining portion of the plug socket, wherein the insertion surface of the socket body has a recessed portion recessed in the insertion direction of the plug, the recessed portion having a bottom surface on which the plug receptacle is disposed And a side surface surrounding the bottom surface, the position of the plug being adjacent to the side surface when the plug piece of the plug is inserted into the plug piece receptacle And when the shutter body is in the closed state of the holding portion is received in the recess portion. The socket of claim 1, further comprising an offset unit for biasing the shutter body toward the plug socket, wherein the plug of the plug is inserted into the plug jack The offset unit offsets the shutter body to keep the retaining portion in contact with the plug, and the offset unit is offset when the plug piece of the plug is not inserted into the plug jack The shutter body covers the plug socket. Such as the socket described in claim 1 or 2, wherein The retaining portion has a contact portion for contacting the rear surface of the plug housing. The socket of claim 3, wherein the shutter body has a shutter main body covering the entire plug piece socket, the holding portion has an inclined portion, and the inclined portion is in the plug An amount of protrusion from the main body of the shutter increases in the insertion direction, and when the plug piece of the plug is inserted into the plug piece receptacle, the shutter body is in contact with the inclined portion The plug moves in a direction away from the plug socket. The socket of claim 4, wherein the contact portion is disposed in a substantially "L" shape and is in contact with the plug, and the contact portion extends from the inclined portion toward the plug insertion direction. The socket of claim 3, wherein the shutter body has a substantially flat-shaped shutter main body covering the plug hole of the plug, the retaining portion having an inclined portion, the inclined portion being An amount of protrusion from the main body of the shutter in the insertion direction of the plug is increased, and when the plug piece of the plug is inserted into the plug socket, the tilt is contacted by the plug Partially retaining the plug blade into the plug socket. The socket of claim 1 or 2, wherein the shutter body covers at least a portion of a side surface of the plug when the plug piece of the plug is inserted into the plug piece receptacle. The socket of claim 1 or 2, further comprising at least one of the shutter body and the socket body An elastic member surrounding the plug receptacle, wherein the resilient member contacts the surrounding portion surrounding the plug receptacle in a compressed state in the receptacle body when the shutter body is in the closed state. The socket of claim 1 or 2, wherein when the shutter body is in the closed state, the retaining portion blocks the surrounding portion by contacting the entire surrounding portion of the plug receptacle Said plug jack. The socket of claim 4, wherein when the shutter body is in the closed state, the retaining portion blocks the plug by touching a surrounding portion surrounding the plug receptacle hole. A socket device comprising: a main body having a plug piece jack on a surface thereof for inserting a plug piece of a plug; a plug piece receiving portion for contacting the plug piece and maintaining the plug piece inserted into the plug piece jack a terminal for contacting a power source; a switch arranged in a circuit between the receiving portion of the blade and the terminal; a position detecting unit for detecting a position of the plug; and a controller for The detection result of the position detecting unit controls the switch, wherein the controller includes: a measuring unit, configured to determine, according to the detection result of the position detecting unit, whether the plug piece of the plug is Plug piece receiving part contact And determining whether the position of the plug is within a prescribed range, wherein the predetermined range means that a distance between the surface of the main body and the plug is less than a predetermined distance; and a switching control unit when measured as the plug The position is used to close the switch when the position is within the prescribed range, and to open the switch when it is determined that the position of the plug is not within the prescribed range.