KR20180126679A - Safety structure for electrical outlet - Google Patents

Abstract

The present invention relates to a safety device for an electrical outlet. An electrical outlet having a lifting plate which is pressed to be withdrawn, comprises: a primary shutter means provided in a lifting plate; a lifting plate locking means; and a secondary shutter means provided below the lifting plate and controlled by a control member of the lifting plate. So, it is possible to prevent a conductor such as a chopstick, which is not a plug, from being inserted into the electrical outlet for fun.

Description

{Safety structure for electrical outlet}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an outlet, and more particularly, to a safety device for a receptacle provided with a lifting plate which is lifted and lowered by pressing a plug.

Generally, when power is used in a home, an office or a work site, a plug connected to household electrical appliances and a wire is plugged into an outlet installed on a wall, or a plug is inserted into a multi-tap outlet connected to the outlet.

These plugs should be plugged into the receptacle when plugged in, and pulled out of the receptacle when plugged out. However, when the plug was disconnected from the outlet, it was very inconvenient because it did not fall very easily, and when the power was excessive, the outlet was damaged.

In order to solve such a problem, Korean Patent Registration No. 10-917871 filed by the applicant of the present application discloses a case in which a top surface is opened and a connection terminal is fixed to a lower inner side; A lifting plate coupled to the inside of the case and moved up and down, the lifting plate having at least one insertion hole into which a connection pin of the power connection plug is inserted; And a connecting pin of the power connection plug is inserted into the insertion hole to lower the lifting plate to the inner side of the case so that the lifting plate is lowered and fixed while the connection terminal and the connecting pin are in contact with each other, And a lifting operation portion that elastically lifts the lifting plate and separates the connection terminal from the connection pin when the plug is pushed downward in the state that the connection pin is in contact with the case.

 According to this structure, the plug and the outlet are engaged and separated only by the operation of pressing the plug toward the outlet, so that the plug and the outlet can be joined or separated with only one hand, so that the plug can be easily combined and separated.

However, the height of the wall-mounted outlet is easily visible to young children who do not know the danger of electric shock, and curious young children are likely to get electric shocks by plugging a conductor into a wall outlet, such as a chopstick or an iron rod .

In order to prevent such a risk, a shutter member which is opened by a plug connecting pin is basically provided on the lower surface of the plug insertion hole. Since the shutter member has a structure in which two plug connecting pins are simultaneously inserted, when the chopsticks are inserted into one insertion hole, the shutter member does not operate and the insertion hole is in the closed state.

However, if two chopsticks are inserted into two insertion holes at the same time, there is a risk that the shutter member is opened and the chopsticks can be inserted into the power supply connection terminal.

Korean Patent Registration No. 10-917871

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide an apparatus and a method for improving safety by providing a primary shutter means, a secondary shearing means opening only when a lifting plate locking means and a lifting plate are lowered So as to provide a safety device for the outlet.

In order to achieve the above objects of the present invention,

And the upper case is provided with a lifting plate lifted up and down in a plug insertion port,

(Referred to as 'secondary shutter means' in the embodiment of the present invention) for opening and closing the plug connection pin insertion hole formed on the upper surface of the terminal plate covering the lower case by the lifting and lowering of the lifting plate .

According to the present invention, by opening and closing the shutter means by raising and lowering the lifting plate in the receptacle provided with the lifting plate, even when the lifting plate is lifted and the two conductor pins are simultaneously inserted, It is.

The shutter means is applicable to any type of shutter means, either rotary shutter means or slide shutter means.

As a preferred embodiment of the slide type shutter means,

A shutter member installed on an upper surface of the terminal plate to allow horizontal movement while pressing the elastic means;

A shutter control member formed on the shutter member as an elongated hole having an inclined surface interfering with insertion of a shutter control member protruding from the lifting plate, the shutter member being horizontally moved while pressing the elastic means by insertion of the shutter control member A shutter control unit for controlling the shutter;

A shutter hole formed in the shutter member to be in contact with the plug connection pin inserting hole of the terminal board by movement of the shutter member, the plug hole allowing insertion of the plug connection pin;

And a control unit.

This slide type shutter means is characterized in that a shutter hole into which a plug pin is inserted and a shutter control hole with an inclined surface into which a shutter control member of a lift plate is inserted are formed as through holes in the shutter member, By forming the through hole, it is possible to reduce twisting at the time of sliding, and to prevent a stable return and failure even if a clearance due to long-term use occurs.

As another embodiment of the present invention, a rotary shutter means can also be used,

A shutter body rotatably installed on an upper surface of the terminal board so as to be provided with a reverse rotation restoring force by elastic means;

A shutter unit integrally formed on the shutter body to open and close the plug connection pin insertion hole of the terminal board by rotation;

A shutter control unit integrally formed on the shutter body to rotate the shutter body while pressing the elastic means by a shutter control member protruding from the lifting plate;

And a control unit.

Since the plug-in pin insertion hole must be opened and closed by rotating the rotary shutter means by the lifting plate, the shutter unit and the shutter control unit are provided at the ends of the cross-shaped shutter body, respectively, And the shutter body can be rotated by inserting the shutter control member of the lifting plate.

Meanwhile, the safety device for a socket according to the present invention can be implemented as a safety device for an outlet with only the shutter means described above. However, when the lifting plate is pressed, the shutter means is in a shutter open state, There is also a need for a minimum safety device to block the path to the connection terminal.

To this end, according to the present invention,

A primary shutter means for opening and closing the plug connection pin insertion hole of the lifting plate by inserting the plug connection pin;

Further comprising:

As the primary shutter means, either a slide-type shutter means or a rotary shutter means can be applied, and it can be a structure in which opening and closing are controlled by a plug-connecting pin.

In the present invention, when the primary shutter means is provided in the lifting plate and the shutter means (secondary shutter means) controlled by the lifting plate is provided below the lifting plate, even if the lifting plate is pressed, It is possible to make a blocking function.

However, the socket to which the present invention is applied has a structure in which the lifting plate is lifted and lowered, and there is a fear that the lifting plate is operated by an unnecessary operation to push up and down the lifting plate as fun for the lifetime of the lifting plate. In view of this, it is necessary to further include a means for preventing the lifting plate from descending when the lifting plate is simply pressed.

Accordingly, in the safety device for a socket according to the present invention,

And a lifting plate locking means for restricting the lifting of the lifting plate so that the lifting plate can be lowered only when the primary shutter means opens the plug connecting pin inserting hole.

The steel plate locking means may be implemented in various embodiments, and embodiments of the present invention, which are implemented in a simple form,

A locking projection protruding from the shutter member of the primary shutter means and exposed to the outside of the lifting plate,

And the locking protrusion is formed in the plug insertion port of the upper case so that the locking protrusion is fitted and the locking protrusion is released by the shutter opening operation of the primary shutter means.

Therefore, it is possible to prevent the pushing-up operation of the lifting plate alone, so that the risk of failure can be reduced and the curiosity induced can be reduced.

The present invention can provide a safety device for an outlet by providing a primary shutter means, a lifting plate locking means, and a secondary shutter means, so that even if a conductor such as a chopstick is inserted into an outlet for fun, So that it is effective in preventing a safety accident.

1 is a schematic outline view of a safety device for an outlet according to the present invention;
2 is a schematic exploded perspective view of a safety device for a socket according to the present invention.
3 is a partially exploded view for explaining a secondary shutter means of a safety device for an outlet according to the present invention;
4 (a) and 4 (b) are explanatory diagrams of a state before the secondary shutter operation of the safety device of the receptacle according to the present invention.
5 (a) and 5 (b) are explanatory diagrams of a plug-in pin insertion completion state of the safety device of the receptacle according to the present invention;
6 (a) and 6 (c) are explanatory diagrams of the structure of the shutter opening and closing part of the secondary shutter means of the safety device of the receptacle according to the present invention;
7 (A) to 7 (D) are a schematic view of the construction and operation of the rotary shutter means of the receptacle safety device according to the present invention.
8 is a schematic perspective view for explaining a secondary shutter locking structure according to the present invention.
9 is a schematic sectional view for explaining a secondary shutter locking structure according to the present invention.
10 is a schematic plan view for explaining a secondary shutter locking structure according to the present invention.
11 is an explanatory view of the size of the conductor pin locking groove according to the present invention.
12 is an exemplary view of a shutter locking means of the rotary shutter means according to the present invention;

Hereinafter, the present invention will be described in detail with reference to embodiments thereof.

FIG. 1 is a schematic outline view of a safety device for a socket according to the present invention, and FIG. 2 is an exploded perspective view of a safety device for a socket according to the present invention.

A lower case 40 provided with a connection terminal for receiving power supply and an upper case 20 coupled to an upper portion of the lower case 40 as shown in FIG. And a plug insertion hole is formed therein so that the lifting plate 30 can be lifted up and down.

The socket for the lifting and lowering of the lifting plate 30 is well described in Korean Patent Registration No. 10-917871 filed by the applicant of the present invention, and therefore, detailed description thereof will be omitted in the present invention.

When the plug 10 is inserted into the receptacle, the connecting pin 11 of the plug 10 is inserted through the connecting pin insertion hole 31 of the lifting plate 30 and inserted into the connection terminal inside the lower case 40, .

The lifting plate 30 is pushed down by the plug 10 when the plug 10 is inserted and when the lifting plate 30 is pressed when the plug 10 is pulled out, 10 is removed from the connection terminal inside the lower case 40. [0054] Accordingly, the user can pull out the connecting pin 11 of the plug 10 from the connecting pin insertion hole 31 of the lifting plate 30 very easily.

 In this receptacle structure, a shutter means is provided as a safety device for preventing forced insertion of a conductor such as a chopstick through the connection pin insertion hole 31 into which the connection pin 11 of the plug 10 is inserted .

2 is a schematic exploded perspective view of a safety device receptacle according to the present invention. As shown in Figure 2,

A lower case 40 provided with a terminal module including a connection terminal 44 connected to a power line, an upper case 20 having a plug insertion opening 21 formed therein, And a connection pin insertion hole 31 into which a plug connection pin 11 is inserted and inserted is formed on the upper surface of the terminal plate 42 of the lower case 40, (Hereinafter, referred to as "secondary shutter means" in the following embodiment) for controlling opening and closing of the connection pin insertion hole 41 of the terminal board 42 so as to be controlled by the control means 30.

A plug inserting hole 21 is formed in the upper case 20 and a guide groove 22 is formed in an inner wall of the plug inserting hole 21. The steel plate 30 is composed of an upper plate 31 and a lower plate 33 and a connection pin insertion hole 31 through which the plug connection pin 11 is inserted is formed.

The slide plate 30 is formed with a slide protrusion and is inserted into the guide groove 22 of the upper case 20 to be guided up and down and a return spring 60 is provided at the lower portion thereof to connect the lift plate 30 to the plug insertion port 21 on the upper side.

A secondary shutter means 70 is provided below the lifting plate 30. The secondary shutter means 70 is slidably mounted on the upper surface of the terminal plate 42 of the lower case 40.

3 is a partially exploded view for explaining a secondary shutter means of a safety device of an outlet according to the present invention.

The secondary shutter means 70 includes a shutter member 71, a pair of shutter control holes 72 formed in the shutter member 71, a pair of shutters 73, and a shutter member 71, A shutter control member 75 protruding from the lower surface of the lift plate 30 and slidably inserted into the shutter control hole 72 to slide the shutter member 71 is formed .

The secondary shutter means 70 of the present invention has a structure in which the lifting plate 30 is lowered and the shutter control member 75 is inserted into the shutter control hole 72 to push the inclined surface to slide the shutter member 71 . That is, the secondary shutter means 70 has a structure in which the shutter opening is controlled by the lifting plate 30.

The secondary shutter means may be constituted by a slide type shutter means as in the embodiment, but the present invention is not limited thereto. The secondary type shutter means may also be constituted by a rotary shutter means in which the slope is rotated by the shutter control member of the lift plate .

On the other hand, even if only the shutter means, that is, the secondary shutter means 70, is provided, the connection pin insertion hole 41 that basically passes to the connection terminal 44 can be blocked, thereby acting as a safety device. However, since the plug connecting pin 11 must be inserted through the lifting plate 30, the plug connecting pin insertion hole 31 of the lifting plate 30 is in an open state. Accordingly, in the present invention, a shutter means (hereinafter, referred to as a "primary shutter means") is further provided in the lifting plate 30 so as to block the connecting pin insertion hole 31 of the lifting plate 30.

Therefore, it further includes a primary shutter means (50) installed in the lifting plate (30) for opening and closing the connection pin insertion hole (31) by the plug connection pin (11).

In the present invention, the primary shutter means (50) is inserted into the lifting plate (30) so as to be slidable.

The primary shutter means 50 includes a shutter control hole having an inclined surface such that the shutter member can be slid by the plug connecting pin 11 inserted through the plug pin insertion hole 31, A structure in which a control surface is formed and an elastic means for supporting the shutter member in a resilient manner is provided and has the same structure as that of a normal slide shutter structure and that the primary shutter means 50 is inserted into the lifting plate 30 .

However, according to the present invention, the lifting plate can be raised and lowered repeatedly by pressing the lifting plate repeatedly for fun, which may cause a failure. Accordingly, the present invention further includes a lifting plate locking means for restricting the lifting of the lifting plate 30.

The lifting plate locking means includes a lifting plate locking protrusion 51 protruding from the shutter member of the primary shutter means 50 for limiting lifting of the lifting plate and exposed to the outside of the lifting plate 30, 20 are formed with a lifting plate locking groove 23 in which the lifting plate locking protrusion 51 can be inserted and removed.

When the shutter member of the primary shutter means 50 is slidably inserted with the plug pin 11 interposed therebetween, the lifting plate locking protrusion 51 is released from the lifting plate locking groove 23 and the locking of the lifting plate 30 is released It becomes possible to descend. That is, only when the plug pin 11 is normally inserted, the primary shutter means 50 is operated to open the shutter, and the lifting plate 30 can be lowered only in the shutter opened state.

Therefore, by further installing the lifting plate locking means, it is possible to prevent only the lifting plate 30 from being forcedly operated by pressing and lifting only the lifting plate 30, thereby preventing a failure due to unnecessary lifting and lowering operations .

The primary shutter means may be constituted by a slide type shutter means as in the embodiment, but is not limited thereto, and may be constituted by a rotary type shutter means in which the inclined surface is rotated by the plug pin.

The operation of the safety device for a socket according to the present invention will be described below.

4 (a) and 4 (b) are explanatory views immediately before the operation of the secondary shutter of the safety device for the receptacle according to the present invention, and FIGS. 5 (a) and 5 FIG. 7 is a diagram illustrating a state in which the connection pin is completely inserted.

4 (a) and 4 (b), when the plug connecting pin 11 is inserted into the connecting pin insertion hole 31 of the lifting plate 30, The primary shutter inside the shutter 30 is opened and the plug connecting pin 11 is inserted into the lower portion of the lifting plate 30. [ At this time, as the primary shutter member is slid, locking of the lifting plate 30 is released, and the lifting plate 30 is lowered downward in a state of being closely attached to the body of the plug 10 in accordance with an operation of pushing down the plug 10.

The shutter control member 75 protruding from the lifting plate 30 as the lifting plate 30 is lowered is inserted into the shutter control hole 72 of the secondary shutter means 70 and is moved by the shutter control member 75 The plug connecting pin 11 comes into contact with the shutter hole 73 of the secondary shutter member 71 when the inclined surface of the shutter control hole 72 is pressed.

5 (a) and 5 (b), when the plug 10 is further pushed down, the shutter control member 75 protruding from the lift plate 30 is released from the shutter control member 71 of the secondary shutter member 71, And the shutter member 71 is slid by pushing the inclined surface.

When the shutter member is slid to open the secondary shutter, the shutter control member 75 is inserted downward through the control member insertion hole 45 formed in the terminal plate 42, Inserted into the connection pin insertion hole 41 formed in the vehicle shutter member 71 and fitted into the connection terminal 44 provided inside the lower case to complete the engagement.

5 (b), the shutter control member 75 formed on the lifting plate is inserted downward through the control member insertion hole 45 of the terminal plate 42, and the lower connection terminal 44, that is, It is designed to be inserted into an area which does not interfere with the knife receiver.

As described above, the present invention is operated as a primary safety device in which the primary shutter means 50 is provided inside the lifting plate 30 and two plug connecting pins 11 are simultaneously inserted to open the primary shutter.

Further, the lifting plate locking means is provided so that the lifting plate 30 can be lowered only when the primary shutter is opened, so that it operates as a secondary safety device.

Further, a secondary shutter means is provided below the lifting plate 30 and operated as a tertiary safety device in which the secondary shutter is opened only when the lifting plate 30 is lowered.

In the structure having only the primary shutter, when the chopsticks are inserted into only one of the two insertion holes, the chopsticks can not be forcibly inserted because the shutter is not opened. However, when two chopsticks are inserted into two connection pin insertion holes at the same time, since the state is the same as that in the case of inserting the connection pin of the plug, the primary shutter means can be opened and can be fitted to the lower side. In consideration of this, a secondary shutter means is further provided.

In addition, since the structure is such that the lift steel plate 30 is pressed and raised and lowered, it may be prudent to press down only the lift steel plate 30 to lower and lift the lift steel plate 30 for fun.

To prevent this, the present invention is equipped with a steel plate locking means. When the primary shutter member is slid while the primary shutter is opened, the lifting plate locking means releases the lifting restriction of the lifting and lowering member as the locking projection protrudes from the locking groove.

That is, the lift plate can be lowered only when the plug pin is normally fitted. Accordingly, the operation of pushing down and pulling up only the steel plate without a plug is prevented.

Further, since the primary shutter is opened when two chopsticks are simultaneously inserted, the secondary shutter means is further provided. Even if two primary chopsticks are inserted and the primary shutter is opened, it is possible to prevent the chopstick from being brought into contact with the connection terminal because the chopstick can not be inserted further down when the secondary shutter means is closed.

In the secondary shutter means, the shutter control member formed by projecting the lifting plate downward and protruding from the lifting plate slides the secondary shutter member, whereby the secondary shutter is opened so that the plug connecting pin is lowered and inserted into the connection terminal to which power is supplied .

Therefore, according to the present invention, since a safety device is provided, it is possible to prevent a conductor such as a chopstick from being inserted into a connection pin insertion hole of a socket by contact with a connection terminal to which power is supplied by curiosity, .

6 (a) and 6 (c) are explanatory diagrams of the structure of the shutter openings of the secondary shutter means of the safety device for the receptacle according to the present invention.

The step portion 90 is formed in the shutter hole 73 formed in the secondary shutter member 71 when the shutter control member 75 is formed to protrude from the lifting plate 30 in the socket according to the present invention.

The plug connecting pin 11 is prevented from sliding up to the second shutter member 71 until the shutter control member 75 protruding from the lifting plate 30 is slidably moved by the second shutter member 71, It should have an interval not to be in contact with the upper surface of the main shutter member 71.

At the time when the lifting plate 30 is lowered by passing the plug pin 11 through the lifting plate 30 as shown in Fig. 6 (a), the lowermost end of the plug connecting pin 11 and the lowermost end of the shutter control member 75 At least the thickness of the secondary shutter member 71 must be ensured.

This is because when the shutter control member 75 is inserted into the shutter control hole 72 and pushes the inclined surface, the plug connecting pin 11 comes into contact with the upper surface of the secondary shutter member 71 and is interfered.

6 (a), it is difficult to secure a space because the length of the plug socket pin 11 to be inserted into contact with the connection terminal 44, It is difficult to make the distance between the tip end of the shutter control member 75 and the tip end of the shutter control member 75 relaxed. Otherwise there is a disadvantage of increasing the overall size.

In view of such a problem, in order to secure a more relaxed operation state, in the present invention, the shutter hole 73 formed in the secondary shutter member 71 is formed in the shape of an elongated hole and the stepped portion 90 is formed on the lower side Structure.

6 (A), when the upper steel plate 30 is further lowered, the shutter control member 75 is moved in the vertical direction as shown in FIG. 6 (B) The insertion pin is inserted into the control hole 72, and the inclined surface is pushed. At this time, the plug pin 11 is positioned on the upper portion of the step portion 90. 6 (c), the shutter control member 75 is inserted into the lower portion by pushing down the inclined surface, thereby making the shutter open state. At this time, Passes through the step portion 90 and passes under the shutter hole 73 so as to be insertable.

As a result, by forming the step portion 90, the height difference between the tip end of the plug connecting pin 11 and the tip end of the shutter control member 75 can be minimized. Therefore, the lifting and lowering space of the lifting plate 30 can be further secured, the lifting operation and the secondary shutter opening / closing operation can be smoothly performed, and the risk of secondary shutter interference due to the plug connecting pin can be reduced.

The secondary shutter means can also be constituted by a rotary secondary shutter means (110). 7 is a schematic view of the operation of the rotary shutter means of the receptacle safety device according to the present invention.

A shutter body rotatably installed on an upper surface of the terminal plate 42 to receive reverse rotation restoring force by an elastic means (not shown in the figure, for example, a torsion spring), as shown in FIG. 7 (a) 111);

A shutter unit 112 formed integrally with the shutter body 111 to open and close the plug connection pin insertion hole 41 of the terminal board 42 by rotation;

A shutter control unit integrally formed on the shutter body 111 to rotate the shutter body 111 while interfering with the inclined plane by the insertion of the shutter control member 75 protruding from the lift plate 30 and pressing the elastic means, 113); .

7 (B), the shutter control member 75 is inserted into the terminal plate 42 corresponding to the rotary secondary shutter means 110 in addition to the plug pin insertion hole 41, The control member insertion hole 45 is formed.

When the rotary secondary shutter means 110 is rotatably assembled on the terminal plate 42, it is installed in a state as shown in FIG. 7 (C). The shutter unit 112 which is a blade of the rotary secondary shutter unit 110 is disposed at a position where the plug connection pin insertion hole 41 of the terminal plate 42 is closed and the shutter control unit 113 controls the shutter control of the terminal plate 42 Is disposed on the member insertion hole (45).

7 (c), when the plug is inserted on the lifting plate 30, the primary shutter means is opened by the plug connecting pin 11, so that the plug pin is inserted into the lower portion of the lifting plate, And when the plug is inserted deeper, the lifting plate is lowered by pushing the lifting plate by the plug body. When the lifting plate 30 is lowered, the shutter control member 75 protruding from the lifting plate first interferes with the shutter control unit 113 of the secondary rotating shutter unit 110. [ The shutter control unit 113 rotates the shutter body 111 while the shutter control member 75 is lowered because the shutter control unit 113 has the inclined surface in accordance with the rotation direction.

7 (d), the plug connection pin insertion hole 41 of the terminal plate 42 is opened and the plug connection pin 11 is inserted.

Therefore, as described above, the secondary shutter means can be realized by the rotary secondary shutter means 110, and the shutter unit 112 for blocking the connection pin insertion hole 41 as shown in Fig. 7 (a) And a shutter control unit 113 for opening the shutter by rotating the shutter body 111 by means of the shutter control member 75 are provided. Although the elastic means is not shown in the drawing, an elastic means (e.g., a torsion spring) is provided between the shutter body 111 and the terminal plate 42 to elastically support the shutter body 111 in the shutter closing direction, The lift plate 30 is returned to the upper position by the return spring and the shutter control member 75 is also pulled up and is rotated in the reverse direction by the elastic means to return to the initial state shown in FIG. .

On the other hand, even when the primary shutter means 50, the lifting steel plate locking means 51, 23, and the secondary shutter means 70 are provided as described above, if two conductor pins are inserted at the same time, And the locking of the lifting plate 30 is released. At this time, in a state in which only two conductor pins are inserted without depressing the lifting plate 30, the conductor pins are no longer inserted because the secondary shutter is in a cut-off state. However, if two conductor pins are inserted at the same time and the lifting plate is pushed down, since the secondary shutter is opened by the lifting plate 30, the conductor pin comes into contact with the connection terminal 44 in the lower case, .

According to the present invention, as described above, a safety structure is proposed in which the secondary shutter is not opened even when two pieces of conductor fins are sandwiched at the same time and then the lower steel plate is lowered.

FIG. 8 is a schematic perspective view for explaining a secondary shutter locking structure according to the present invention, FIG. 9 is a schematic sectional view for explaining a secondary shutter locking structure according to the present invention, and FIG. 10 is a cross- Fig. 3 is a schematic plan view for explaining the locking structure. Fig.

A first shutter means 50 provided in the lift plate 30 and a second shutter means 50 provided in the terminal plate 42 of the lower case 40 And a secondary shutter means (70) provided on an upper surface of the lifting plate (30) to open and close the secondary shutter means (70)

The conductor pin locking (not shown) formed on the shutter member 71 of the secondary shutter means 70 so as to lock the secondary shutter means 70 by fitting the end of the conductor pin 101 inserted through the lifting plate 30 And a groove (100).

The conductor pin locking groove 100 may be circular, elliptical or polygonal, or may be formed of a stepped groove having a locking groove formed in the step of FIG. That is, when another conductive pin 100 is inserted in place of the plug connection pin 11 in the upper portion, the conductive pin 100 is inserted into the conductive pin locking groove 100 formed in the secondary shutter member 71 as shown in Figs. 8 to 10 It is structured. In the drawing, a stepped groove is exemplified.

When the two conductor pins 101 are inserted at the same time, the primary shutter means 50 is opened and the conductor pin 101 can be inserted into the lower portion through the lift plate 30. In the case of merely inserting only two conductor pins at the same time, since the secondary shutter means 70 is in a closed state, it is possible to prevent the conductor pin 101 from being inserted further downward.

In the case where the conductor pin locking groove 100 of the present invention is not formed, when two conductor pins 101 are simultaneously inserted and the lift plate 30 is pushed down, There is a risk that the shutter member 70 is opened and the conductor pin 101 can be inserted into the connection terminal 44 inside the lower case.

Accordingly, the present invention can be applied to the secondary shutter member 71 as means for locking the secondary shutter means 70 when simultaneously pushing the lifting plate 30 while simultaneously inserting the two conductor pins 101 The conductive pin locking groove 100 is formed. When the conductor pin 101 is inserted as shown in Figs. 6 to 9, the end of the conductor pin 101 is fitted into the conductor pin locking groove 100 to lock the secondary shutter member.

That is, if the end portion of the conductor pin 101 is fitted in the conductor pin locking groove 100, even if the lift plate 30 is lowered and the shutter control member 75 is to be inserted into the shutter control hole 72, The shutter control member 75 can not be caught by the inclined surface of the shutter control hole 72 because the shutter member 71 is caught by the conductor pin 101 and the sliding is restricted. That is, the lifting plate 30 can no longer be lowered, and the secondary shutter means 70 maintains the locked state.

As a result, even if two conductor pins 101 are sandwiched at the same time and the lifting plate 30 is lowered, the lifting plate 30 can not be lowered, and the secondary shutter means 70 maintains the closed state. (101) can not be lowered to the connection terminal (44) in the lower case (40), thereby preventing an electric shock accident.

11 is an explanatory view of the size of the conductor pin locking groove according to the present invention.

The present invention should lock the end of the conductor pin 101 in the conductor pin locking groove 100 so that the secondary shutter member 71 is not slid or rotated. Therefore, it is preferable that the upper inner diameter b of the conductor pin locking groove 100 is formed to be larger than the outer diameter a of the plug connecting pin 11 (diameter: a <b).

That is, the outer diameter of the conductor pin 101 which can be inserted up to the secondary shutter means 70 can not be larger than that of the plug connecting pin 11. In order to pass through the plug pin insertion hole 31 of the upper lift plate 30 or the connection pin insertion hole of the primary shutter, the conductor pin 101 larger than the plug pin 11 is inserted The largest conductor pin 101 is caught in the locking groove 100 when the upper inner diameter of the conductor pin locking groove 100 is made larger than the outer diameter of the plug connecting pin 11. Therefore,

12 is an exemplary view of a shutter locking means of the rotary shutter means according to the present invention.

The secondary shutter means of the present invention may be constituted by a rotary locking means as shown in Fig. 7A. In this case, as shown in Fig. 12, the shutter locking means ) Can be formed. The shutter unit 112 is a shutter that closes the plug connection pin insertion hole 41 formed in the terminal plate 42. When the conductive pin 101 is fitted on the shutter unit 112, . The lifting plate 30 is lowered and the shutter control member 75 can not be rotated even if the shutter control member 113 pushes the inclined surface of the shutter control unit 113. [ That is, since the end of the conductive pin 101 is caught by the shutter locking groove 100, the shutter is prevented from rotating and thus the opening of the shutter is prevented.

As a result, when two conductor pins 101 are inserted at the same time, only the conductor pin 101 is inserted into the lower portion of the lift plate and the lift plate is not pushed down. Therefore, when the conductor pin 101 contacts the upper surface of the shutter portion 112 The shutter is locked in the shutter locking groove 100 to prevent the shutter from rotating. Thereafter, even if the lifting plate is manually pushed, the lifting plate can not be lowered while the rotation is prevented, and the shutter is kept closed to operate as a safety device.

In describing the present invention, the shutter hole is a hole formed in the shutter member and into which the plug-in pin is inserted, and the shutter control hole means a hole in the inclined surface formed in the shutter member for operating the shutter. The plug pin insertion hole is a hole formed in the steel plate and the terminal plate to insert the plug connection pin.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications and alterations within the spirit and scope of the invention are within the scope of the invention as defined by the appended claims.

10: plug 11: plug pin
20: upper case 21: plug insertion port
22: guide groove 23: locking groove
30: Rising steel plate 31: Connection pin insertion hole of the steel plate
32: Steel plate upper plate 33: Steel plate lower plate
40: lower case 41: connection pin insertion hole of the terminal plate
42: terminal plate 43: base plate
44: connection terminal 45: control member insertion hole
50: primary shutter means 51: locking projection
60: Return spring 70: Secondary shutter means
71: secondary shutter member 72: shutter control ball
73: shutter hole 74: elastic means
75: shutter control member 80: ground pin
90: step portion 100: conductor pin locking groove
101: conductor pin 110: rotary secondary shutter means
111: shutter body 112: shutter part
113:

Claims (7)

And the upper case is provided with a lifting plate lifted up and down in a plug insertion port,
And a shutter means for opening and closing the plug connection pin insertion hole formed in the terminal plate of the lower case by the lifting and lowering of the lifting and lowering plate.
2. The apparatus according to claim 1,
A shutter member installed on an upper surface of the terminal plate to allow horizontal movement while pressing the elastic means;
A shutter control member formed on the shutter member as an elongated hole having an inclined surface interfering with insertion of a shutter control member protruding from the lifting plate, the shutter member being horizontally moved while pressing the elastic means by insertion of the shutter control member A shutter control unit for controlling the shutter;
A shutter hole formed in the shutter member to be in contact with the plug connection pin inserting hole of the terminal board by movement of the shutter member, the plug hole allowing insertion of the plug connection pin;
And the safety device of the outlet.
2. The apparatus according to claim 1,
A shutter body rotatably installed on an upper surface of the terminal board so as to be provided with a reverse rotation restoring force by elastic means;
A shutter unit integrally formed on the shutter body to open and close the plug connection pin insertion hole of the terminal board by rotation;
A shutter control unit integrally formed on the shutter body to rotate the shutter body while pressing the elastic means by a shutter control member protruding from the lifting plate;
And a safety device for the outlet.
The safety device according to any one of claims 1 to 3,
A primary shutter means for opening and closing the plug connection pin insertion hole of the lifting plate by inserting the plug connection pin;
Further comprising: a safety device for the outlet.
The image forming apparatus according to claim 4,
Wherein the slider of the shutter unit is pushed by the insertion of the plug pin and is rotated while pressing the elastic means to open the plug pin insertion hole Wherein said means for preventing rotation of said outlet means is a rotary shutter means.
5. The safety device according to claim 4,
Further comprising a lifting plate locking means for restricting the lifting of the lifting plate so that the lifting plate can be lowered only when the primary shutter means opens the plug connecting pin insertion hole.
7. The steel plate lifting device according to claim 6,
A locking projection protruding from the shutter member of the primary shutter means and exposed to the outside of the lifting plate,
Wherein the locking protrusion is formed in the plug insertion port of the upper case so that the locking protrusion is fitted and the locking protrusion is released by the shutter opening operation of the primary shutter means.

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