KR20180126681A - 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 pressured out, includes a first shutter means provided in the lifting plate, a lifting plate locking means, a second shutter means provided at the lower part of the lifting plate and opened and closed by a plug connection pin, and a second shutter locking means for locking the second shutter member by the second shutter locking member of the lifting plate. The locking of the second shutter is released by lowering the lifting plate. After that, a plug pin is inserted to open the second shutter. Since the second shutter for opening and closing the plug pin exists even when the lifting plate can not be lifted due to failure, a minimum safety device can be provided.

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 the power plug pin is inserted; The power supply connecting plug pin 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 in a state in which the connecting terminal and the connecting pin are in contact with each other, And an elevating operation portion for elastically raising the elevating plate so that the connecting terminal and the connecting pin are spaced apart when the plug is pushed downward in the state that the 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 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

It is an object of the present invention to provide a safety device for a socket outlet in which pin insertion holes are not opened unless two metal pins are inserted into both pin insertion holes of the socket-outlet and the lifting plate is not lowered.

Another object of the present invention is to provide a safety device for an outlet that at least closes an outlet connection terminal even if the lifting plate fails to rise.

Still another object of the present invention is to enable the locking and opening / closing of the shutter means to be controlled by the operation of the lifting and lowering plate.

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

And a lower case having a connection terminal to which power is supplied, and an upper case having a lifting plate that is lifted and lowered in the pin insertion hole,

A shutter means provided below the operation section of the lifting and lowering mechanism for opening and closing a path communicating with the connection terminal by plug pin insertion;

A shutter locking means for locking or unlocking the shutter means from being operated by the lifting and lowering of the lifting plate;

And a control unit.

In the present invention, if the lifting plate is not lowered, the shutter is locked. Even if a metal pin is inserted, the shutter is not opened. Even if the lifting plate fails to lift due to failure of the lifting plate, the shutter is closed. The shutter means represents the second shutter means in the embodiment. The lower portion of the operating section of the lifting plate refers to a position where the bottom surface of the lower plate of the lifting plate can be lowered most in the direction of the power supply connection terminal, for example, the lower portion of the upper case or the lower case cover.

Further, according to the present invention,

A steel plate shutter means provided in the steel plate for opening and closing a pin insertion hole of the steel plate by insertion of a plug pin;

A lifting plate lowering limiting means for limiting the lifting of the lifting plate only when the lifting plate shutter means is in an open state;

Further comprising:

When the lifting plate shutter means and the descending restriction means are additionally provided in the safety device of the receptacle provided with the shutter means and the shutter locking means at the lower portion of the lifting plate, the lifting plate lowering restricting means is provided to press the lifting plate to ascend and descend .

Further, the lifting plate lowering limiting means includes:

A latching protrusion protruding from the shutter member of the lifting plate shutter means and exposed to the outside of the lifting plate;

A lower limiting groove formed on the inner wall of the plug insertion port of the upper case so that the locking protrusion is fitted and the locking protrusion is released by a shutter opening operation of the lifting plate shutter means;

.

It is to be understood that the present invention is not limited to the above embodiments, and may be modified so that the lifting plate can be lowered only when the shutter in the lifting plate is opened. The structure can be limited.

In addition,

A lock key protruding from a support boss of the steel plate;

A lock key groove formed in the shutter unit to correspond to the lock key, the lock key being inserted to lock the shutter unit when the lift plate is raised, and releasing the lock when the lift plate is lowered when the lift plate is lowered;

And a control unit.

The structure of the shutter locking means constituted by the locking key formed on the lifting plate supporting boss and the locking key groove formed in the rotating shutter means can be realized in various forms, and is not limited to the above structure , Any structure that locks the operation of the shutter means at the lifting plate elevation position and releases the locking mechanism when the lifting plate descends can belong to the category of the shutter locking means of the present invention.

Further, the lock key and the lock key-

And a plurality of pairs are formed at positions corresponding to each other.

In addition,

A rotation guide portion rotatably installed as a cylindrical structure in which a lifting plate support boss of the lifting steel plate is inserted and inserted;

A shutter unit formed in a shape of wings on both sides of the rotation guide unit and having inclined surfaces opposite to each other;

An elastic means coupled to an outer periphery of the rotation guide portion and provided to provide a rotational return force of the shutter means;

And a rotary shutter unit including the shutter unit.

In addition,

A guide boss extending outwardly of the shutter unit and bent upward;

A protruding key protruding from an upper end of the guide boss;

A key groove portion protruding from an upper end of the cut surface from which a part of a side surface of the lifting plate is removed so as to correspond to a protruding key,

And a control unit.

This structure has a structure in which a lock key is formed on the shutter means and a lock key groove is formed on the steel plate. The lock key is formed on the lifting plate support boss and the lock key groove is formed on the shutter means. Structure.

In addition,

Wherein the shutter member is integrally formed with the shutter member having an inclined surface and is a sliding shutter means for providing a sliding return force of the shutter member by the elastic means.

Further, in the case where the slide type shutter means is provided,

A guide boss projecting from a lower surface of the steel plate,

A locking part extending from the guide boss to the rear surface of the shutter part of the shutter member to limit the sliding of the shutter part;

And a control unit.

As such, the shutter means can be applied to any type of rotary shutter means or slide shutter means, and the structure of the shutter locking means can be designed and applied in a customized manner.

Further, according to the present invention,

And a lower case having a connection terminal to which power is supplied, and an upper case having a lifting plate that is lifted and lowered in the pin insertion hole,

A shutter mounting plate provided below the operating section of the lifting plate and having a support boss insertion hole of the lifting plate and a plug pin insertion hole formed therein;

Shutter means formed of a cylindrical rotation guide portion corresponding to the support boss insertion hole and a shutter portion formed as a double blade of the rotation guide portion and rotatably installed on the lower surface of the shutter mounting plate;

A lock key protruding from a support boss of the steel plate;

A lock key groove vertically penetrating between the rotation guide and the shutter to insert the lock key;

An inclined cam surface formed to be inclined at a lower end of the rotation guide cylinder so as to interfere with the lower end of the cylindrical guide of the rotation guide when the lock key is lifted up to guide the shutter means in the shutter closing direction and inserted into the lock key groove;

And a control unit.

In this structure, when the shutter means is constituted by the rotary shutter means, the torsion spring is removed, the inclined cam surface is formed on the rotation guide of the shutter means, and the cam projection is formed on the lifting plate support boss, The shutter means is rotated backward at the original angle due to the interference between the cam protrusion and the inclined cam surface. That is, a structure is shown in which the resilient means for returning the shutter means is removed.

According to another aspect of the present invention, there is provided a receptacle in which a lower case is provided with a connection terminal to which power is supplied, and an upper case is provided with a lifting plate which is raised and lowered in a pin insertion hole,

A shutter unit provided below the operating section of the lifting plate and composed of a cylindrical rotation guide section corresponding to the support boss of the lifting plate and a shutter section formed as a double blade of the rotation guide section;

A cam protrusion spirally formed on the lifting plate support boss;

A cam groove formed in the rotation guide with a helical groove into which the cam projection is inserted;

And a control unit.

Such a structure can provide a structure in which the shutter is locked if the lifting plate is not lowered based on the spiral cam projections and the cam grooves, and the shutter means is opened and closed by raising and lowering the lifting plate.

The present invention can prevent the insertion of the metal pin if the shutter means provided on the lower portion of the lifting plate is locked by the lifting plate even if the conductor pins such as two chopsticks are simultaneously inserted into the receptacle and the lifting plate fails to rise There is an effect that the pin insertion hole communicating with the connection terminal can be prevented with a minimum safety function even if the shutter means of the lower portion of the lifting plate is closed.

1 is an exploded perspective view of a safety device for an outlet according to the present invention;
2 (A) to 2 (D) are explanatory diagrams of a safety device operation state of the receptacle according to the present invention.
3 (a) and 3 (b) are explanatory diagrams of a safety device when inserting a metal pin into an outlet according to the present invention;
4 (a) and 4 (b) are explanatory views of a shutter locking means of a safety device for an outlet according to the present invention;
5 (A) to 5 (C) are explanatory views of a structure of a safety device for an outlet according to the present invention, in which there is no elastic means for returning the shutter.
6 (a) and 6 (b) are views showing an example in which the second shutter means according to the present invention is provided on the upper surface of the shutter mounting plate;
7 (a) and 7 (b) are views showing an example in which the second shutter means according to the present invention is constituted by a slide-type shutter means.
8A and 8B are explanatory views of a shutter locking means according to another embodiment of the present invention.
9 (A) to 9 (C) are explanatory views of a shutter locking means according to another embodiment of the present invention.

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

1 is an exploded perspective view of a safety device for an outlet according to the present invention. As shown in Figure 1,

The socket of the present invention includes a lower case 40 provided with a terminal module including a connection terminal 44 to which power is supplied and a plug inserting hole 21 serving as a through hole for inserting the plug 10, An upper case 20 coupled to the upper case 20 on the upper case 20 and a lifting plate 30 mounted on the upper case 20 so as to move up and down in the plug insertion opening 21.

(Hereinafter referred to as "first shutter means") 50 is provided inside the elevating plate 30 and the elevating plate 30 (hereinafter, referred to as "first shutter means") is provided inside the elevating plate 30 as a safety device for the receptacle having the elevating plate 30 (Hereinafter, referred to as "second shutter means") 70 is further provided below the operating section of the second shutter means.

The safety device for a socket is provided with a lifting plate lowering limiting means for locking or unlocking the lifting plate 30 in such a manner that the lifting plate 30 can not be lowered based on opening and closing of the first shutter means 50, (Second shutter locking means) that locks or unlocks the second shutter means (70) by preventing the second shutter means (70) from being opened.

According to the present invention,

A plug insertion port 21 is formed as a through hole in the upper case 20 and a lifting plate guide groove 22 is formed on the inner wall of the plug insertion opening 21. [ The lifting plate 30 is composed of an upper plate 32 and a lower plate 33 and has a plug pin insertion hole 31 formed therethrough.

A lift plate support boss 34 protrudes from the lower surface of the lower plate 33 and a return spring 60 is provided under the lift plate support boss 34 to elastically support the lift plate 30 upward .

The upper plate 32 is guided by a lifting guide protrusion corresponding to the lifting plate guide groove 22 so that the lifting plate 30 can be lifted and lowered while maintaining a balance in the plug insertion opening 21. [

The structure in which the lifting plate 30 is lifted and lowered can be implemented in various forms. For example, a plurality of bosses may be formed at the edge of the bottom of the lifting plate, and each boss may be elastically supported by a spring, Alternatively, as shown in FIG. 1, a steel plate support boss may be formed and a resilient force may be supported by a return spring.

Therefore, the safety device for a socket according to the present invention can be applied to a design change corresponding to each structure corresponding to the ascending and descending structure of the steel plate. Here, in the present invention, the structure in which the lifting plate 30 is lowered and locked, and the lifting plate 30 is lifted again by the return force of the return spring when the lifting plate 30 is pressed in the locked state is described in detail in the prior art document. Therefore, And its concrete function is not explained.

The plug pin 11 is inserted through the pin insertion hole 31 of the lift plate 30 and inserted into the connection terminal 44 inside the lower case 40 to be energized Structure.

The lifting plate 30 is pushed down by the body of the plug 10 when the plug 10 is fitted and when the lifting plate 30 is pressed when the plug 10 is pulled out, The pin 11 is lifted off from the connection terminal 44 of the lower case 40. Accordingly, the user can easily pull out the plug pin 11 because the plug pin 11 needs to be pulled out from the pin insertion hole 31 of the lifting plate 30.

In such a receptacle structure, a shutter means is provided as a safety device for a receptacle for preventing metal pins such as chopsticks from being forcedly inserted through the pin insertion holes 31.

As the shutter means, the lifting plate shutter means 50 is provided inside the lifting plate 30 as shown in Fig. The first shutter means 50 is provided with a slide-type shutter means that slides by the plug pin 11 with the slope of the shutter member disposed below the pin insertion hole 31 formed in the lift plate upper plate 32.

Here, the first shutter means 50 is exemplified as the slide shutter means, but the present invention is not limited to this, and the shutter means may be constituted by a rotary shutter means in which the slant surface of the shutter member is rotated by the plug pin 11 while being pushed.

In the case where only one metal pin is inserted when the first shutter means 50 is provided, the shutter means is not opened and the insertion of the metal pin can be prevented (FIG. 3A).

However, the receptacle to which the present invention is applied has a structure in which the lifting plate is lifted and lowered, which can cause curiosity, and can be repeatedly lifted and lowered by pressing the lifting plate only for fun. If you repeatedly press the steel plate for fun without inserting a plug, foreign objects can easily get caught in the gap. Repeated abnormal operation can cause breakdown. It can cause another curiosity, This can be done.

In view of such a problem, the present invention includes a steel plate falling limiter as a safety device for an outlet.

The lifting plate lowering limiting means has a structure in which the lifting plate 30 can be lowered only when the first shutter means 50 provided inside the lifting plate is opened.

In the present invention, a locking protrusion 51 is formed on the shutter member of the first shutter to extend outwardly of the lifting plate 30, and the lowering restriction is provided on the inner wall of the plug insertion port 21 of the upper case, Thereby forming a groove 23. In the shutter closing state of the first shutter means 50, since the engaging projection 51 is inserted into the falling limiting groove 23, the lift plate is not lowered even if the lift plate 30 is pressed.

When the plug is normally inserted and the plug pin 11 opens the first shutter means 50, the locking projection 51 is released from the falling limiting groove 23. Accordingly, when the body of the plug 10 presses the lifting plate 30, the lifting plate 30 is lowered.

When the plug is normally inserted, the first shutter means 50 is opened first, and the lifting limit restricting means is also released from the lifting restriction. Then, the lifting plate 30 is pushed by the plug body and is normally operated .

However, in the case where only the lifting plate 30 is pressed without opening the shutter of the first shutter means, the lifting plate 30 is in a state in which the lifting plate 30 is not lowered.

On the other hand, when the first shutter means 50 is provided in the lifting plate 30, when one metal pin 101 is fitted as shown in Fig. 3 (A), the shutter member is not pushed out, have.

3 (b), the shutter member of the first shutter means 50 is slid with the same operation as that for inserting the plug pin 11, so that two metal pins 101 Can be inserted.

Therefore, even if two metal pins 101 are sandwiched therebetween, it is necessary to further install a safety device so as not to insert the connection terminal 44. The second shutter means 70 is provided as such a safety device.

1, the second shutter means 70 includes a rotation guide portion 71 that is rotatably installed as a cylindrical structure in which the lifting plate support boss 34 of the lifting plate 30 is inserted and inserted, A shutter unit 72 formed in a wing shape on both sides of the rotation guide unit 71 and having inclined surfaces in mutually opposite directions and elastic means 74 provided to provide a returning force of the shutter means .

The second shutter means 70 is provided on the lower surface of the shutter mounting plate 42 with the shutter mounting plate 42 as shown in Figs. 1, 2 and 4. A receiving groove 47 for mounting the second shutter means 70 is formed on the lower surface of the shutter mounting plate 42. A pin insertion hole 41 into which the plug pin 11 is inserted is formed in the receiving groove 47, And a boss insertion hole 46 into which the support boss 34 of the elevating plate 30 is inserted.

The shutter mounting plate 42 may be installed on the lower side of the upper case 20 or on the upper surface of the lower case 40 so as to secure a working space of the second shutter means. This allows the outlet designer to change the design of the installation location taking into account the working space.

The structure for installing the second shutter means 70 in the receiving groove 47 of the lower surface of the shutter mounting plate 42 can be easily implemented by any person skilled in the art. The structure for fixing and mounting to the case can be easily realized. Therefore, the detailed structure and description are omitted in the present invention.

The feature of the shutter mounting plate 42 of the present invention is that the provision of the second shutter means by the provision of the receiving groove 47 allows the shutter means part to be seated in the receiving groove at the time of assembling to facilitate the assembly.

The second shutter means 70 is rotated about the rotation guide 71 when the plug pin 11 is normally inserted and the inclined surface of the shutter portion 72 is pushed, (44).

When only the first shutter means 50 and the second shutter means 70 are opened by the plug pin 11 and the two metal pins 101 are put together as shown in FIG. The first and second shutter means 50 and 70 are all opened while the metal pin 101 is in contact with the connection terminal 44 to cause an electric shock accident.

Therefore, in the present invention, when the lifting plate 30 is not lowered, the second shutter means 70 is locked and the two metal pins 101 are locked, And second shutter locking means for locking the second shutter so as not to be opened by the second shutter locking means.

As an example of the second shutter locking means, as shown in Figs. 4A and 4B,

The second shutter locking means includes a lock key 201 protruding from the support boss 34 of the lift plate 30 and a second shutter locking mechanism formed on the second shutter means 70 in correspondence with the lock key 201, When the steel plate 30 is lifted, the lock key 201 is inserted to lock the second shutter means 70. When the lift plate 30 is lowered, the lock key 201 is released and the second shutter means 70 is released, And a lock key groove 202 for releasing the lock of the lock key.

The lock key 201 and the lock key groove 202 are formed in pairs at a position corresponding to each other.

When such a second shutter locking means is further provided, the key is locked in the keyway as shown in Fig. 4 (B) in the standby state. When the plug 10 is normally inserted in the state as shown in Fig. 2 (A), the primary shutter is opened by the plug pin 11, and the lifting plate 30 is rotated by the plug body Down.

At this time, as the lifting plate 30 is lowered, the lock key 201 is detached from the lock key groove 202 formed on the inner wall of the cylindrical portion of the rotation guide portion 71 and falls downward. Therefore, as shown in FIG. 2 (C), the plug pin 11 can be rotated by pushing the inclined surface of the shutter unit 72. The plug pin 11 can be inserted into the lower portion of the shutter mounting plate 42 of the lower case 40 and connected to the connection terminal 44 as the shutter pin 72 is rotated do.

3 (B), the first shutter means 50 is opened by the two metal pins 101, but the second shutter means 70 is opened by the two metal pins 101, Is in a locked state because the lifting plate 30 is not moved downward. That is, since the lock key 201 formed on the lifting plate support boss 34 is fitted in the lock key groove 202 of the second shutter means, even if the shutter pin 72 is pushed by two metal pins 101, the lock key 201 is not rotated. Therefore, even if two metal pins are sandwiched at the same time, since the second shutter is locked by the second shutter locking means, the second shutter can not be opened and insertion of the metal pin can be blocked.

1, an elastic means 74 such as a torsion spring is required for the returning force of the second shutter means 70. [ If a torsion spring is used, the metal parts are installed near the connection terminals to which the power is connected, and there is a possibility of causing a short circuit or the like when the torsion spring is released due to malfunction. Accordingly, the present invention proposes a structure in which a torsion spring for providing a returning force of the rotation type second shutter means is removed.

The second shutter means 70 according to the present invention has a structure in which the shutter portion 72 having an inclined surface in the form of a double wing of the cylindrical rotation guide 71 is integrally formed as shown in Figs. And a locking key groove 202 is formed between the rotation guide 71 and the shutter 72. The cylindrical tip of the rotation guide 71 is formed as an inclined cam surface 203. [ Here, FIGS. 4A and 4B illustrate a structure in which a tilt cam surface is formed like the shutter means of FIG. 5 and a torsion spring is omitted.

The lock key 201 formed on the support boss of the lifting plate 30 is inserted into the lock key groove 202 and the second shutter means 70 is locked as shown in FIG.

When the lifting plate 30 is lowered by inserting the plug as shown in FIG. 5 (C), the locking key 201 is released from the locking key groove 202 and descends downward as shown in FIG. 5 (C) The shutter unit 72 can be rotated by pushing the inclined surface of the shutter unit 72 by the shutter unit 11.

When the plug is pulled out, the lift plate 30 is raised by the return force of the return spring 60 when the plug is pressed. At this time, since the lock key 201 formed on the lifting plate support boss 34 is lifted up to contact with the inclined cam surface 203, the lock key 201 pushes the inclined surface of the inclined cam surface 203 to rotate the shutter member, The lock key 201 is inserted into the lock key groove 202 at the end of the lock key 201 and is rotated in the reverse direction at the original angle. That is, the second shutter means 70 is reversely rotated at the original angle by the lift of the lifting plate 30 without the spring such as the torsion spring, and the lock key 201 is inserted into the lock key groove 202, It is possible to keep the shutter means 70 in a locked state.

On the other hand, the second shutter means 70 may be provided on the upper surface of the shutter mounting plate 42. 6 (a) and 6 (b) are views showing an example in which the second shutter means according to the present invention is provided on the upper surface of the shutter mounting plate.

6 (a), the shutter mounting plate 42 includes a guide 48 protruding around a region for mounting the second shutter means, and a boss insertion hole 46 And a pin insertion hole 41, The first shutter means 70 and the elastic means 74 are provided on the upper surface of the shutter mounting plate 42 as shown in FIG. 6 (B).

6 (b), when the lifting plate 30 is lowered and inserted into the rotation supporting portion 71, the locking key 201 formed on the lifting plate supporting boss 34 is inserted into the locking key groove 202, The lifting plate 30 is further lowered and the locking pin 201 is released to the lower portion of the shutter mounting plate 42 so that the plug pin 11 is pushed down by the inclined surface of the shutter portion 72 It is a rotating structure.

Therefore, the second shutter means 70 can be provided on the lower surface of the shutter mounting plate 42 as shown in Figs. 1 to 4. However, the second shutter means 70 can also be provided on the shutter mounting plate 42 as shown in Fig. And the shutter mounting plate 42 may be selectively fixed according to the designer.

Meanwhile, although the second shutter locking means is constituted by a lock key and a lock key groove, the present invention is not limited thereto, and various embodiments can be configured. As described above, in addition to the structure in which the lock key 201 and the corresponding lock key groove 202 are formed, the shutter lock means can be configured according to the shape of the lifting plate support boss and the shape of the second shutter means.

FIGS. 7A and 7B are block diagrams of a safety device according to another embodiment of the present invention. FIG. As shown therein,

The slide fastener according to claim 1, further comprising: a slide type second shutter means (70 ') provided on a shutter mounting plate (42) of a lower case; and a guide boss And a locking part 212 protruding from the lower end of the guide boss 211 to be engaged with the second shutter unit.

The shutter mounting plate 42 is further provided with a boss passage hole 45 through which the guide boss 211 and the latching portion 212 pass vertically and the assembly of the second shutter unit 70 ' It is possible to form the guide 48 so as to facilitate the operation. Although not shown in the drawings, the slide guides of the slide shutter member and the engagement holes for vertically engaging with the front and rear stoppers are formed, but the construction of the slide shutter member is omitted.

The shutter mounting plate 42 may be a shutter mounting plate serving as a cover for covering the upper surface of the lower case 40. However, the present invention is not limited thereto, and an independent shutter installation for installing the second shutter means 70 It may be a plate.

In another embodiment of the present invention configured as described above, the engagement portion 212 of the guide boss 211 supports the rear side of the inclined surface of the slide member. That is, unless the lifting plate 30 is lowered, the sliding direction of the second shutter means 70 'is blocked by the engaging portion 212 as shown in FIG. 7 (B). At this time, even if the metal pin is inserted and the slant surface is pushed, the shutter member can not be slid on the latching pawl, so that the shutter can not be opened and the metal pin can not be inserted. Thereafter, when the lifting plate 30 is lowered, the engaging portion 212 attached to the support boss 211 is lowered through the boss passing hole 45 of the shutter mounting plate 42 to unlock the shutter member. When the plug pin is lowered and pushed when the shutter member is in the unlocked state, the shutter member is slid to open the shutter.

 7 is a structure in which the second shutter means is unlocked only when the lifting plate is lowered, and the shutter is opened only when the plug pin is inserted in the unlocked state. Therefore, the second shutter is not opened simply by inserting the two metal pins. When the plug is inserted, the shutter is opened while the lock is unlocked naturally. Therefore, the shutter is not disturbed in use at all. The second shutter means can be operated as a minimum safety device since it is in a closed state.

On the other hand, another structure in which the torsion spring is not used when the second shutter means is the rotary shutter means is proposed as shown in Fig.

8 (A) and 8 (B) are diagrams showing still another embodiment of a safety device for a socket according to the present invention. As shown therein,

A spiral cam protrusion 231 is formed on the support boss 34 of the lifting plate 30 and a cam groove 232 is formed on the inner wall of the rotation guide 71 of the second shutter means 70 so as to correspond to the cam protrusion 231. [ .

The second shutter means 70 maintains the locked state when the cam protrusion 231 is inserted into the cam groove 232. When the lift plate 30 is lowered, , The first shutter means 70 is rotated in accordance with the spiral shape of the cam protrusion 231 to open the pin insertion hole 41 of the shutter mounting plate 42.

When the lifting plate 30 is lifted by pressing the plug, the second shutter means 70 is reversely rotated at the original angle due to the relationship between the cam protrusion 231 and the cam groove 232, . That is, the opening and closing of the second shutter means can be controlled by raising and lowering the lifting plate, and the second shutter means is kept in the locked state in the lifting state of the lifting plate.

Therefore, since the second shutter means is kept locked when the lifting plate is not lowered, it is possible to shut off even when the metal pin is inserted, and the opening and closing of the second shutter means is controlled in conjunction with the lifting / lowering of the lifting plate. It is possible to perform the function of rotating and returning the second shutter means to the original direction by the cam protrusion and the cam groove structure even if there is no resilient means such as a torsion spring.

9 (a) to 9 (c) are diagrams for explaining another embodiment of a safety device for an outlet according to the present invention.

 As shown in Fig. 9 (A)

A cut surface 200 cut off both side surfaces of the lifting plate 30 so as to form a predetermined space between both side surfaces of the lifting plate 30 and the inner wall of the plug insertion port 21; A key groove 221 protruded sideways at a central upper end of the cut surface 200; A guide bar 222 which extends outwardly from the shutter portion 71 of the rotary second shutter means 70 and is bent upward; A protruding key 223 formed at the tip of the guide bar 222 to correspond to the key groove 221; And an elastic means (74) provided below the second shutter means (70) and rotating guide (71) to provide a returning force.

In the safety device thus configured, the guide bar 222 is formed integrally with the shutter unit to the outside of the shutter unit 71. A cut surface 220 is formed on a side surface of the steel sheet so that the guide bar 222 can be inserted and the arc can be moved. That is, when the cut surface 220 is formed by cutting off the side surface, a space is formed between the inner walls of the plug insertion port 21, and a space in which the guide bar 222 is inserted and the arc can move according to the rotation of the shutter can be secured .

A protruding key 223 formed at the tip of the guide bar 222 is formed as a shutter locking means and a key groove 221 is formed at an upper end of the cut surface 220 so that the protruding key 223 can be inserted .

9 (B), the protruding key 223 is inserted into the key groove 221 when the lifting plate 30 is raised. The protruding key 223 of the guide bar 222 is inserted into the key groove 221 of the lifting plate 30 so that the second shutter means 70 The shutter can not be rotated and the shutter is closed.

When the lifting plate 30 is lowered, the projecting key 222 is released from the key groove 221 as shown in FIG. 9 (C), so that when the second shutter means 70 is unlocked and the plug pin is inserted, The shutter is opened. FIG. 9 (C) illustrates a case where the lift plate 30 can not be raised to its original position due to a failure.

The second shutter means 70 maintains the shutter in a closed state even when the lifting plate is lowered due to failure of the lifting plate 30. In this state, if the plug pin is normally fitted, the first shutter means in the lifting plate, The second shutter means of the installing means can be normally used by inserting the plug pin into the connection terminal in the lower case while the shutter pin is opened by the plug pin.

As described above, in the present specification, when the lifting plate is lifted by using the lock key formed on the support boss of the lifting plate, the second shutter means is caught by the lock key and can not move to the body with the pin insertion hole blocked, A plurality of embodiments of a safety device for a receptacle having a structure in which a lock is released while a plug pin is inserted and a shutter is opened has been described.

However, this embodiment can be modified in any way on the basis of this, and the structure in which the locking state of the second shutter means which has been in the locked state as the descending of the lifting plate is released and the second shutter means is opened by the plug pin, It is a structure that belongs to a possible right.

10: Plug 11: Plug pin
20: upper case 21: plug insertion port
22: Guide groove 23:
30: Steel plate 31: Pin insertion hole of steel plate
32: Steel plate upper plate 33: Steel plate lower plate
34: lifting plate supporting boss 40: lower case
41: pin insertion hole 42: shutter mounting plate
44: connection terminal 46: boss insertion hole
47: receiving groove 48: guide
50: first shutter means 51:
60: return spring 70, 70 ': second shutter means
71: rotation guide 72: shutter part
74: elastic means 101: metal pin
201: lock key 202: lock key groove
203: inclined cam surface 211: guide boss
212: engaging portion 220: cut surface
221: key groove portion 222: guide bar
223: Extrude key

Claims (17)

And a lower case having a connection terminal to which power is supplied, and an upper case having a lifting plate that is lifted and lowered in the pin insertion hole,
A shutter means provided below the operation section of the lifting and lowering mechanism for opening and closing a path communicating with the connection terminal by plug pin insertion;
A shutter locking means for locking or unlocking the shutter means from being operated by the lifting and lowering of the lifting plate;
And the safety device of the outlet.
The method according to claim 1,
A steel plate shutter means installed in the steel plate for opening and closing a pin insertion hole of the steel plate by insertion of a plug pin;
Further comprising the step of:
3. The method of claim 2,
A lifting plate lowering limiting means for limiting the lifting of the lifting plate only when the lifting plate shutter means is in an open state;
Further comprising the step of:
The apparatus according to claim 3, wherein the lifting plate lowering limiting means comprises:
A latching protrusion protruding from the shutter member of the lifting plate shutter means and exposed to the outside of the lifting plate;
A lower limiting groove formed on the inner wall of the plug insertion port of the upper case so that the locking protrusion is fitted and the locking protrusion is released by a shutter opening operation of the lifting plate shutter means;
And the safety device of the outlet.
2. The apparatus according to claim 1,
A lock key protruding from a support boss of the steel plate;
A lock key groove formed in the shutter unit to correspond to the lock key, the lock key being inserted to lock the shutter unit when the lift plate is raised, and releasing the lock when the lift plate is lowered when the lift plate is lowered;
And the safety device of the outlet.
6. The apparatus of claim 5, wherein the lock key and the lock key-
And a plurality of pairs are formed in pairs at positions corresponding to each other.
2. The apparatus according to claim 1,
A rotation guide portion rotatably installed as a cylindrical structure in which a lifting plate support boss of the lifting steel plate is inserted and inserted;
A shutter unit formed in a shape of wings on both sides of the rotation guide unit and having inclined surfaces opposite to each other;
An elastic means coupled to an outer periphery of the rotation guide portion and provided to provide a rotational return force of the shutter means;
Wherein the first opening and closing means is a rotary shutter means including a second opening.
8. The apparatus according to claim 7,
A guide boss extending outwardly of the shutter unit and bent upward;
A protruding key protruding from an upper end of the guide boss;
A key groove portion protruding from an upper end of the cut surface from which a part of a side surface of the lifting plate is removed so as to correspond to a protruding key,
And a safety device for the outlet.
2. The apparatus according to claim 1,
Characterized in that the shutter member integrally formed with the shutter member having an inclined surface is a sliding shutter means for providing the sliding returning force of the shutter member by the elastic means.
9. The apparatus according to claim 8,
A guide boss projecting from a lower surface of the steel plate,
A locking part extending from the guide boss to the rear surface of the shutter part of the shutter member to limit the sliding of the shutter part;
And a safety device for the outlet.
And a lower case having a connection terminal to which power is supplied, and an upper case having a lifting plate that is lifted and lowered in the pin insertion hole,
A shutter mounting plate provided below the operating section of the lifting plate and having a support boss insertion hole of the lifting plate and a plug pin insertion hole formed therein;
Shutter means formed of a cylindrical rotation guide portion corresponding to the support boss insertion hole and a shutter portion formed as a double blade of the rotation guide portion and rotatably installed on the lower surface of the shutter mounting plate;
A lock key protruding from a support boss of the steel plate;
A lock key groove vertically penetrating between the rotation guide and the shutter to insert the lock key;
An inclined cam surface formed to be inclined at a lower end of the rotation guide cylinder so as to interfere with the lower end of the cylinder of the rotation guide when the lock key is lifted upwards to guide the shutter means in the shutter closing direction and inserted into the lock key groove;
And the safety device of the outlet.
And a lower case having a connection terminal to which power is supplied, and an upper case having a lifting plate that is lifted and lowered in the pin insertion hole,
A shutter unit provided below the operating section of the lifting plate and composed of a cylindrical rotation guide section corresponding to the support boss of the lifting plate and a shutter section formed as a double blade of the rotation guide section;
A cam protrusion spirally formed on the lifting plate support boss;
A cam groove formed in the rotation guide with a helical groove into which the cam projection is inserted;
And the safety device of the outlet.
13. The method according to claim 11 or 12,
A steel plate shutter means provided in the steel plate for opening and closing a pin insertion hole of the steel plate by insertion of a plug pin;
A lifting plate lowering limiting means for limiting the lifting of the lifting plate only when the lifting plate shutter means is in an open state;
Further comprising the step of:
And a lower case having a connection terminal to which power is supplied, and an upper case having a lifting plate that is lifted and lowered in the pin insertion hole,
A shutter means provided below the operation section of the lifting and lowering mechanism for opening and closing a path communicating with the connection terminal by plug pin insertion;
A shutter locking means for locking or unlocking the shutter means from being operated by the lifting and lowering of the lifting plate;
A steel plate shutter means provided in the steel plate for opening and closing a pin insertion hole of the steel plate by insertion of a plug pin;
A lifting plate lowering limiting means for limiting the lifting of the lifting plate only when the lifting plate shutter means is in an open state;
And the safety device of the outlet.
15. The apparatus according to claim 14,
A lock key protruding from a support boss of the steel plate;
A lock key groove formed in the shutter unit to correspond to the lock key, the lock key being inserted to lock the shutter unit when the lift plate is raised, and releasing the lock when the lift plate is lowered when the lift plate is lowered;
And the safety device of the outlet.
15. The apparatus according to claim 14, wherein the shutter means and the lifting plate shutter means comprise:
Rotating shutter means for opening and closing the plug pin insertion hole rotated by plug pin insertion; or
A slide type shutter means for opening and closing the plug pin insertion hole by sliding the shutter member by plug pin insertion;
The safety device of the outlet.
15. The method of claim 14,
The shutter mounting plate on which the lifting plate supporting boss insertion hole and the plug pin insertion hole are formed is provided below the operating section of the lifting plate,
Wherein the shutter means is provided to open and close the plug pin insertion hole by raising and lowering the lifting plate on the upper surface or the lower surface of the shutter mounting plate.

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