JP2000182719A - Fixing structure for plug blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To firmly insert a plug into a receptacle and to allow smooth release between them by arranging a curved projection and curving outward of a U-shaped elastic piece in a position matching a cutout in the blade intermediate part, fixing one end of the U-shaped elastic piece to a plug, positioning a free end of the U-shaped elastic piece in the cutout of the blade, and pressing the projection part for extending and advancing it into the cutout. SOLUTION: Cutouts 111 are arranged in the upper and lower both sides of an intermediate part of a blade 11 in a plug 1, while a recess 112 is arranged in the rear part. In a U-shaped elastic piece 2, curved projection parts 21 are provided in the positions matching the cutouts 111, and an internal recess part 22 is arranged in the position matching the recess 112. The elastic piece 2 is arranged circularly on both sides of the blade 11, a free end of the elastic piece 2 is extended to the cutout 111 in the blade 11, and the blade 11 and the rear part of the elastic piece 2 are fixed inside the plug 1. When the plug 1 is inserted into a receptacle, a projection part 21 in the elastic piece 2 is engaged with an inside wall top part of the insertion port by means of a spring force for preventing release. In removal, the projection part 21 is extended by pressure from the inside wall, so that the plug can be released smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing structure of a plug blade, and more particularly, to a rigid fixing that a projection of an elastic piece abuts and locks on a top of an inner wall of a plug insertion hole so that the plug does not easily fall off. Structure.

[0002]

2. Description of the Related Art At present, household electric appliances use a system in which a power plug draws current from a socket, and such operation of electric power has already become a part of daily life. When plugging the power plug of a commercially available home electric appliance into the socket, the blade is only fixed by the pinching force of the current-carrying piece in the socket. After a lapse of time, the current-carrying piece of the power plug, which has been inserted for a long time, starts to relax and has a poor localization effect, and easily falls off. If a communication device such as a computer suddenly goes outage due to the disconnection of a power plug, it will cause great confusion and affect the entire system. Also, when a one-to-three plug adapter is inserted into the socket on the wall, and the power plugs of the electrical appliances are inserted into the three sets of insertion ports, respectively, if the one-to-three plug adapter does not have sufficient fixing force, You can't stay tight with the socket. In addition, when it is desired to remove the power plug of the electrical appliance from one of the three sets of one-to-three plug adapters, the one-to-three plug adapters themselves fall off from the sockets on the wall, and the remaining two sets are removed. The power supply of the electrical equipment inserted in the outlet also goes outage.

As shown in FIG. 20, some of the one-to-three plug adapters 9 have a structure in which the blade 92 can rotate, and can rotate and orient in a storage space recessed in place. A rotating part 91 is provided, and a blade 92 and a conducting piece 93 are provided.
Are directly riveted with rivets 94 and joined,
Both are connected. Therefore, the angle is adjusted by the rotation of the blade 92 and the interlocking movement of the rotation part 91 and inserted into the insertion opening of the socket. However, since this kind of plug directly contacts the blade 92 and the conductive piece 93 with the rivet 94, It is prone to extremes where the bond between the two is excessively tight or vice versa,
The operation of interlocking the rotation unit 91 by the rotation of the blade 92 requires an excessive force because the connection is prohibited, or it easily moves even with a small force because it is too loose.
It is difficult to precisely adjust the angle of the blade 92. As described above, the above-described plug adapter 9 is not the best structure for use. As shown in FIG. 21, a ring 95 is provided at the joint between the plug 92 and the conductive piece 93 at the time of fastening, and a rivet 94 is provided. A method has been invented in which the current-carrying piece 93 and the blade 92 are joined together with the ring 95 interposed therebetween by penetrating the current-carrying piece 93, the ring 95 and the blade 2. This has the effect of reducing the friction generated by the rotation with respect to the piece 93, so that the blade 92 does not become excessively tight or loose during the rotation operation, and the angle can be adjusted relatively easily. However, the ring 95 itself is a minute element, and the work in the process of being installed between the current-carrying piece 93 and the blade 92 and the process of being nailed by the rivet 94 are extremely complicated, and the manufacturing cost cannot be suppressed. .

[0004]

SUMMARY OF THE INVENTION According to the present invention, a plug is inserted into a socket in a stable and fixed state.
Provided is a plug blade fixing structure capable of separating both components smoothly by withdrawal with an appropriate force. The power plug of the electrical appliance inserted into the one-to-three plug adapter does not come out and the plug of the adapter itself does not come out at the same time. The ring does not need to be installed in the moving structure, and can be rotated more smoothly, reducing the time and cost required for assembly.

[0005]

In order to firmly fix the blade of the plug in the socket, an elastic piece is formed in combination with the plug, and a notch is formed at each side of the plug blade intermediate portion. The front side portions corresponding to the front side have outwardly curved projections, the side edges of the blade are mounted, and the rear portion is fixed inside the plug. The present invention can take various forms, for example, even if two elastic pieces are directly fitted and fixed to one end of the notch on both sides of the blade, the elastic cover piece corresponds to the notch of the blade. Even if convex parts are provided on both sides of the front part and side parts are connected continuously at the rear part,
Even if the blade is in direct contact with the current-carrying piece of the plug adapter, an opening is further opened in the flat surface of the blade, and the fitted shell at one end of the elastic piece is fitted with the blade and extends from the front end of the fitted shell. A projection having a pressing elasticity may be provided,
When the plug is inserted, the elasticity of the projections or projections of the elastic piece as described above causes the blade to abut and lock the inner wall of the insertion opening of the socket, thereby making the insertion and fixing of the plug and the socket robust.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment in which a plug 1 is designed with an elastic piece 2 mounted thereon. Plug 1
A notch 111 is formed on each of the upper and lower sides of an intermediate portion of the blade 11 installed at an appropriate position, and a recess 112 is provided on the rear. The elastic piece 2 has a degree of latitude of the blade 11 of the plug 1.
It has a U-shape (other shapes are also possible), and has outwardly curved projections 21 at positions corresponding to the notches 111 on the upper and lower sides of the front part, and further has concave parts 112 on both sides on the rear part.
The inner concave portion 22 is provided at a position corresponding to the above.

In the assembly of this embodiment, as shown in FIG. 2, the elastic piece 2 is mounted on both sides of the plug 1 blade 11 and the inner concave portion 22 of the elastic piece 2 is fitted into the recess 112 of the blade 2. And
The front end (that is, the free end) of the elastic piece 2 extends to the cutout 111 of the blade 11, and the rear part of the blade 11 and the elastic piece 2 are fixed inside the plug 1. Thus, the plug 1 has a structure having the elastic pieces 2 on both sides of the blade 11.

As shown in FIG. 3, the plug 1 blade 11
Is inserted into the socket 31 and the blade 1 is inserted.
1 The projections 21 of the elastic pieces 2 provided on both sides abut and lock on the top of the inner wall of the insertion port 31 due to the spring force thereof.
Is fixed so as not to be detached from the socket 3 by an external force. At the time of removal, the projection 21 of the elastic piece 2 having a spring force is extended by the pressure of the inner wall of the insertion port 31, and the plug 1 is smoothly removed from the socket 3. During the above operation, the space in which the projections 21 of the elastic pieces 2 can be uniformly pressed and extended for insertion and removal of the plug 1 is the space formed by the cutout 111 of the plug 1.

As shown in FIG. 4, according to the second embodiment of the present invention, notches 111 are provided on both sides of the intermediate portion of the plug 1 blade 11, and cut grooves 113 are provided at one end on the opposite side. I do. The elastic piece 2 is made of a thin piece or a wire, and an arc-shaped convex portion 24 extending from a fixing portion 23 provided at one end thereof has a pressing elasticity. From the above structure, the fixing portion 23 is appropriately fitted and fitted into the blade 11 cut groove 113, and the convex portion 24 is positioned at the notch 111 so that its end extends into the notch 111, Alternatively, the notch groove 113 may be pressed and fixed so that the elastic piece 2 and the blade 11 do not come off due to deformation of the material.

As shown in FIG. 5, when the blade 11 is inserted into the insertion port 31 of the socket 3, the elastic piece 2 is locked and fixed to the inner wall of the insertion port 3 with an appropriate elasticity and detached by an external force. There is no. Also, the elastic piece 2 having elasticity
The convex portion 24 extends under the pressure of the inner wall of the socket 3 insertion port 31, enters the blade 11 notch 113, and can be smoothly removed.

As shown in FIG. 6, in the third embodiment of the present invention, the elastic piece 2 is replaced by an elastic wire 28 having a high elasticity index.
An insertion groove 114 is provided at an appropriate position corresponding to the cutout 111 on both sides of the blade 11 at one end. The elastic wire 28 has a structure in which the fixing portion 281 extends to form an arc-shaped projection 282. Therefore, the fixing portion 281 of the elastic wire 28 is inserted into the insertion groove 114 of the blade 11 with an appropriate force. The elastic wire 28 is stretched and enters the cutout 111 of the blade 11, and the insertion groove 114 is pressed and fixed, so that the elastic wire 28 is firmly fitted and fixed to the blade 11. Further, the blade 11, the elastic piece 2, and the elastic wire 28 in the third embodiment of the present invention adopt an integrated structure as in the fourth embodiment shown in FIG. In this case, integrated contact portions 115 having integral elasticity are provided on both sides of the blade 11.

In a fifth embodiment of the present invention, the blade 11 and the elastic piece 2 are changed as shown in FIG.
1 and the elastic cover 42 are installed. A notch 411 is provided in the middle of both sides of the blade 41, and a through hole 4 is provided in the rear.
12 are provided. The elastic cover 42 is located on the front sides,
The convex portion 42 curved outwardly at a position corresponding to the notch 411.
1 is formed, and the side piece 422 continuously provided on the rear portion is
3 and a perforation 424 is provided on the convex body 423 so as to face the through hole 412 of the blade 41. These are shown in FIG. 9 and FIG.
Can be applied to one-to-three adapters as shown by
In that case, the elastic cover piece 42 is fitted to one end of the blade 41, and the perforation 424 of the convex body 423 is inserted into the through hole 41 of the blade 41.
2 and the convex portion 421 is inserted into the cutout 41 of the blade 41.
1, the rivet 44 further penetrates the conducting piece 43, and the protrusion 423 of the elastic cover 42 pierces 424 and the through hole 412 of the blade 41, and the blade 41 and the conducting piece 43 are connected to conduct electricity. State. The contact between the elastic cover piece 42 side piece 422 and the conductive piece 43 depends only on the convex body 423, and the upper convex body 423 and the conductive piece 43 are in contact with each other. When they are interlocked with each other, it is not difficult to rotate due to excessive relaxation or tightness, so that the ring 95 provided in the conventional product is not required, and the time and cost required for assembly can be reduced. Further, the shape of the convex body 423 is not particularly limited, and if the shape has a protruding shape such as a granular shape, the turning operation can be performed smoothly as in the present embodiment.

The elastic piece 2 according to the present invention is not limited to the fitting type shown in FIGS. 4 and 6 and the integrated type shown in FIG. In addition, the protrusions 24 not only have the shape shown in the figure, but also expand under the pressure of external force such as, for example, an arc shape or a bent shape, enter the notch 111 of the blade 11, and It is sufficient if the original convex shape is restored when is released.

As shown in FIG. 11, the blade 51 has an opening 511 in a flat surface, and the opening 511 may be a concave tank having a concave shape. At this time, the blade 51 may be installed on either side of the flat surface of the blade 51. The elastic side 2 is formed of a thin piece or a wire, and is provided with a U-shaped fitting shell 25 at one end thereof. ing. The flat portion 26 partially forms a recessed shape (as in FIG. 1), and the portion is fitted into the blade 51 opening 511 at the time of assembling, or all of the flat portion 26 has a flat shape and is directly adhered to the blade 51. Is also good.

As shown in FIG. 12 and FIG.
Is fitted from the inside (or outside) of the flat surface of the blade 51 of the plug 5, and is embedded in the plug 5. When the flat portion 26 of the elastic piece 2 is fitted into the opening 511 of the blade 51, the flat portion 26 becomes a flat surface at the same height as the flat surface of the blade 51, so that the protrusion 27 protrudes at the opening 511, and its end is It fits in the opening 511 (and when the opening 511 is short, the flat portion 26 is directly
May be stuck on the flat surface of the first member, and the protrusion 27 may be protruded from the opening 511). As shown in FIGS. 13 and 14, when the plug 5 blade 51 is inserted into the socket 3 insertion port 31 and deformed so that the protrusion 27 of the elastic piece can enter the opening 511 under the pressure from the insertion port 31. The blade 51 is completely inserted into the insertion port 31, and as shown in FIG. 15, the projection 27 of the elastic piece 2 recovers its original convex shape due to the characteristic of its material, and contacts the inner wall of the insertion port 31 to engage. To stop the blade 51 from falling off by external force.

As shown in FIGS. 16 and 17, the blade of the plug may be of a type that bends the lamella symmetrically, and a fitting piece 611 whose one edge is connected to the lamella in a proper position and protrudes slightly outward. And fitting pieces 6 other than the connected end edges
The periphery of 11 has a cutout 6111, and the fitting piece 611 has a protruding shape, and thus has a pressing elasticity. In addition, at a position corresponding to the fitting piece 611, a notched opening 61 that can accommodate the fitting piece 611.
When the plug 2 is provided and the flake is bent to form the plug 6 blade 61, the fitting piece 611 is fitted in the cutout 612 and slightly protrudes on the flake surface, thereby fixing the blade 61 by its elasticity and elasticity.

As shown in FIG. 18, the plug 7 has an engaging portion 71 protruding in an arc shape in the middle of one flat surface of the blade 71.
1 and the other blade 71 has a notch 712
When the elastic piece 2 is fitted to the socket 3 and inserted into the socket 31, the locking portion 711 of the blade 71 abuts and locks on the inner wall of the insertion port 31 to position the blade 71. As shown in FIG. 19, the plug 8 blade 81 made of a thin piece is provided with a locking portion 811 opposite to both ends, and this is bent symmetrically to form the blade 8. Each of the locking portions 811 is a convex body projecting inward and outward on the blade 81, and when the locking portion 811 is inserted into the insertion port 31 of the socket 3, the locking section 811 abuts on the inner wall of the insertion port 31 and locks. Then, the blade 81 is fixed in the socket 3.

[0018]

According to the present invention, when a plug is inserted into a socket, it is firmly fixed by the structure of the plug blade so that it does not fall out unnecessarily. It can be applied to forms.

[Brief description of the drawings]

FIG. 1 is a three-dimensional view and a local sectional view of a first embodiment of the present invention.

FIG. 2 is an assembled sectional view of the first embodiment of the present invention.

FIG. 3 is an embodiment diagram of the first embodiment of the present invention.

FIG. 4 is a three-dimensional view of a second embodiment of the present invention.

FIG. 5 is an embodiment diagram of the second embodiment of the present invention.

FIG. 6 is a three-dimensional view of a third embodiment of the present invention.

FIG. 7 is an assembled sectional view of a fourth embodiment of the present invention.

FIG. 8 is a three-dimensional exploded view of a fifth embodiment of the present invention.

FIG. 9 is an assembled sectional view of a fifth embodiment of the present invention.

FIG. 10 is an external perspective view of a fifth embodiment of the present invention.

FIG. 11 is a three-dimensional exploded view of a sixth embodiment of the present invention.

FIG. 12 is an assembly explanatory view of a sixth embodiment of the present invention.

FIG. 13 is an assembled sectional view of a sixth embodiment of the present invention.

FIG. 14 is an embodiment diagram of a sixth embodiment of the present invention.

FIG. 15 is an embodiment diagram of a sixth embodiment of the present invention.

FIG. 16 is a structural explanatory view of a seventh embodiment of the present invention.

FIG. 17 is an explanatory view for assembling a seventh embodiment of the present invention.

FIG. 18 is an embodiment diagram of the eighth embodiment of the present invention.

FIG. 19 is an embodiment view of the ninth embodiment of the present invention.

FIG. 20 is an assembled sectional view of a conventional product.

FIG. 21 is an assembled sectional view of a conventional product.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plug 11 Blade 111 Notch 112 Depression 113 113 Cut groove 114 Insertion groove 115 Contact part 2 Elastic piece 21 Protrusion part 22 Inner concave part 23 Fixed part 24 Convex part 25 Fitting shell 26 Flat part 27 Projection 28 Elastic wire 281 Fixed part 282 Convex part 3 Socket 31 Insertion port 4 Adapter 41 Blade 411 Notch 412 Through hole 42 Elastic cover piece 421 Convex part 422 Side piece 423 Convex body 424 Perforated 43 Rivet 44 Current piece 45 Rotating part 5 Plug 51 Blade 511 Notch Mouth 6 Plug 61 Blade 611 Fitting piece 6111 Cutout 612 Cutout opening 7 Plug 71 Blade 711 Locking part 712 Cutout 8 Plug 81 Blade 811 Locking part 9 Plug adapter 91 Rotating part 92 Blade 93 Electricity piece 94 Rivet 95 Ring

Claims (11)

[Claims] 1. A plug formed by combining an elastic piece with a blade, wherein the elastic piece is adjacent to both the blades and one end of both are fixed to the plug, and the elastic piece having a U-shape is formed by the blade. At an appropriate position on both sides of the front part at a position corresponding to the notch in the middle part, there is a protrusion that curves outward, the free end of the elastic piece is located at the notch of the blade, and the protrusion is caused by an external force. A plug blade fixing structure characterized in that it expands and enters into a notch when receiving pressure. 2. The plug blade fixing structure according to claim 1, wherein a recess is provided in a rear portion of the plug blade, and an inner recess corresponding to the recess is provided in a rear portion of the elastic piece. 3. The plug blade is combined with the elastic piece, and the notch is provided at an intermediate portion of the blade. The elastic piece has a curved portion on the outside corresponding to the fixing portion and the blade notch. The protrusion has a pressing elasticity, and the elastic piece is integrated with the outside of the cutout, or the plug blade is fixed directly to one end of the cutout. 4. The plug blade fixing structure according to claim 3, wherein the elastic piece is a thin piece or a wire. 5. The plug blade is provided with a current-carrying piece, combined with an elastic cover piece, opening the notch at the middle of the blade, and providing a through hole at the rear, and the elastic cover piece is provided with the notch. Corresponding position of the mouth, having a convex portion that curves outward on both sides of the front part, a side piece is continuously connected to the rear part, a convex body having a perforation is provided in the center of the side piece, and the elastic cover piece is attached to the blade. Fitting
When it comes into pivotal contact with the current-carrying piece, the convex body is a plug blade fixing structure interposed between the blade and the current-carrying piece. 6. An opening is formed in each of said blade intermediate portions combined with said elastic pieces, and said elastic pieces are provided with flat portions and corresponding positions of said cutouts, and convex portions curving outward on both sides of a front portion thereof. The portion has a pressing elasticity, and the opening is provided on a flat surface of the blade, and the fixing structure of the plug blade having a hollow shape is provided. 7. The plug blade fixing structure according to claim 6, wherein the protrusion of the elastic piece may be provided inside or outside the flat surface of the blade. 8. The opening may be a concave tank that does not penetrate,
7. The fixing structure for a plug blade according to claim 6, wherein the recess may be inside or outside the flat surface of the blade. 9. The blade according to claim 6, wherein the flat portion of the elastic piece is stuck on the end face of the blade, or may be fitted into the opening to form a plane having the same height as the end face of the blade. Plug blade fixing structure. 10. The plug blade fixing structure according to claim 6, wherein said elastic piece and said blade are integrated. 11. An arcuate locking portion formed by pressing on one of said flat surfaces of said plug blade.
3. The fixing structure for a plug blade according to 1.