JP2002216888A - Waterproof cover for plug and guide for wearing of its waterproof cover, and wearing method of waterproof cover for plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily use a plug of indoor specifications as a plug of waterproof specifications. SOLUTION: An waterproof cover 22 for plug is detachably provided in a plug 17 of indoor specifications. A base end 23a of the waterproof cover 22 for plug is closely adhered to a perimeter part of a power cord 18 over its all circumferences, and the waterproof cover 22 for plug has a convex part 26 for plugging-in in a perimeter pat of its tip part 23b. In case the plug 17 is connected to an wall socket 12 of waterproof specification, the waterproof function can be obtained by making the convex part 26 for plugging-in plug-in to a receiving opening 15 of a pipe-shape of the wall socket 12 side. Since it can be used as the plug of waterproof specification only by providing the plug 17 of indoor specification with the waterproofing cover 22 for plug, it becomes possible to easily use the plug 17 of indoor specifications as the plug of waterproof specification.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof cover for a plug used by being attached to a plug of indoor specification, a mounting guide used when the waterproof cover is attached to the plug, and a waterproof cover for the plug. Related to the mounting method.

[0002]

Conventionally, when a power tool or a work light is used in a place away from a power outlet installed in a building, for example, a cord reel provided with an extension electric cord is used. In this type of cord reel, an electric cord for extension is wound around the reel, and an outlet electrically connected to the electric cord is provided.

[0003] When an electric tool or a work light is used using such a cord reel, the following is performed. That is, the plug of the electric cord wound around the cord reel is connected to a power outlet installed in the building, and the main body of the cord reel is pulled out of the electric cord to use a power tool or a work light. Take it close. Then, by plugging the electrical cord plug of the power tool or work light into the outlet of the cord reel and connecting it, the power tool or work light can be used in a place away from the power outlet installed in the building Can be.

Here, the above-mentioned cord reels are classified into a waterproof type which can be used outdoors even in rainy weather, and a non-waterproof type. In the case of a waterproof code reel, FIG.
As shown in FIG. 1, a cylindrical socket 4 is provided on the front side of the outlet support plate 2 provided with the outlet 1 so as to surround the insertion hole 3. The receptacle 4 is formed of a molding material 5 made of synthetic resin or rubber. The molding material 5 also covers the outlet 1 on the back side of the outlet support plate 2. In the case of a non-waterproof type, though not shown, there is no molding material 5 and no cylindrical receiving port 4 is provided.

[0005] On the other hand, plugs for power tools and working lights are classified into waterproof type and indoor type which are not waterproof type. FIG. 6 shows a plug 6 of a waterproof specification, and FIG. 7 shows a plug 7 of an indoor specification. These plugs 6,7
Are provided at the ends of the electric cords 8, 9, respectively.

The front part of the plug body 6a of the waterproof plug 6 shown in FIG. 6 is formed in a circular shape, and an annular fitting convex part 6b is integrally provided on the outer periphery of the front part. . When connecting the waterproof plug 6 to the waterproof outlet 1, the terminal 6c of the plug 6 is connected to the outlet 1 through the insertion hole 3 as shown in FIG. At this time, the fitting projection 6b of the plug body 6a is fitted into the receptacle 4 on the outlet 1 side, and the fitting projection 6b is brought into close contact with the inner peripheral surface of the receptacle 4 over the entire circumference. Thus, even if water is applied to the plug 6 and the receptacle 4 from outside, it is possible to prevent the water from entering the connection between the plug 6 and the outlet 1.

On the other hand, a plug 7 of indoor specification shown in FIG.
The front surface 7b of the plug body 7a is
And the outer dimension of the front part of the plug body 7a is set smaller than the inner diameter of the receptacle 4. When connecting the plug 7 of the indoor specification having such a configuration to the outlet 1 of the waterproof specification, as shown in FIG.
Is connected to the outlet 1 through the insertion hole 3. At this time, since the outer peripheral surface of the plug main body 7a and the inner peripheral surface of the receptacle 4 are separated from each other, when water is applied to the plug 7 and the receptacle 4 from outside, the water is removed from the plug main body 7a. There is a possibility that the terminal 7c of the plug 7 may enter the connection portion between the outlet 1 and the plug 7 through the insertion hole 3 from between the front surface 7b and the front surface of the outlet support plate 2, and the waterproof function cannot be obtained.

Therefore, conventionally, the plug 7 of the indoor specification is used.
Cannot be used in a part where waterproofness is required, because the waterproof function cannot be obtained even when it is connected to a waterproof outlet 1. In order to cope with this, for example, it is conceivable to cut off the plug 7 part from the electric cord 9 having the indoor specification plug 7 and replace it with the waterproof specification plug 6 for use. However, this requires a separate plug 6 of a waterproof specification, which is costly and requires a lot of trouble to replace, which is troublesome.

The present invention has been made in view of the above circumstances, and a first object of the present invention is to provide a waterproof cover for a plug that enables an indoor plug to be easily used as a waterproof plug. To provide. Also, the second
It is an object of the present invention to provide a plug waterproof cover mounting guide for facilitating mounting of a plug waterproof cover on an indoor specification plug.
Still another object of the present invention is to provide a method of attaching a plug waterproof cover that can easily attach a plug waterproof cover to an indoor specification plug.

[0010]

In order to achieve the above-mentioned first object, a plug waterproof cover according to the first aspect of the present invention covers an indoor specification plug provided at the tip of an electric cord. A cover body which is detachably mounted so that the base end thereof is in close contact with the outer periphery of the base end of the plug or the outer periphery of the electric cord over the entire circumference, and has a tubular opening with an opening at the end. And a fitting portion that is provided at the tip of the plug and that is fitted over the entire periphery of the cylindrical receptacle on the side of the outlet while the plug is connected to a waterproof outlet. It is characterized by the following.

When the waterproof cover for a plug having such a structure is mounted on a plug for indoor use, the proximal end of the waterproof cover for the plug comes into close contact with the outer peripheral portion of the proximal end of the plug or the outer peripheral portion of the electric cord. I do. Then, the plug with the plug waterproof cover attached is connected to a waterproof outlet, and the fitting portion of the plug waterproof cover is
Fit to the inner periphery of the cylindrical receptacle on the outlet side. As a result, a waterproof function can be obtained even though the plug is designed for indoor use.

Therefore, according to the waterproof cover for a plug of the present invention, the plug can be used as a waterproof plug simply by attaching the plug waterproof cover to an indoor plug, which is different from the case where a plug is replaced. Thus, it becomes possible to easily use a plug of indoor specification as a plug of waterproof specification. Further, since the plug waterproof cover is detachable, it can be removed from the plug when it becomes unnecessary.

In this case, it is preferable that the cover body is formed such that the distal end portion has relatively high hardness and the base end portion has high elasticity. . According to this, by making the distal end side of the cover main body relatively hard, the fitting portion of the front end of the cover main body can be easily fitted to the receptacle on the outlet side, and the state of close contact with the receptacle can be achieved. Can be maintained satisfactorily. In addition, by increasing the elasticity of the base end side of the cover main body, when the plug waterproof cover is mounted on the plug, the base end side of the cover main body is easily spread and is easily mounted. Also, in the mounted state, the base end of the cover main body is likely to adhere to the outer periphery of the base end of the plug or the outer periphery of the electric cord.

According to a third aspect of the present invention, there is provided a constricted portion on the base end side of the cover main body, the constricted portion being in close contact with the outer peripheral portion of the base end portion of the plug or the outer peripheral portion of the electric cord connected to the plug. It has a trumpet-shaped part which spreads in a trumpet shape from a part. According to this, since the constricted portion is provided on the base end side of the cover main body, it becomes easy to adhere to the outer periphery of the base end of the plug or the outer periphery of the electric cord. In addition, the presence of the trumpet-shaped portion extending from the constricted portion in a trumpet shape has an effect of making the constricted portion less likely to be torn when the constricted portion is expanded.

The invention according to a fourth aspect is characterized in that the cover body has a recess for releasing the plug at a tip end thereof. By providing a concave portion for escape of the plug at the distal end of the cover main body, even if the shape and size of the distal end of the plug main body are different, it becomes possible to cope with it.

According to a fifth aspect of the present invention, in order to achieve the second object, a plug for indoor use is provided.
A mounting guide used when mounting the plug waterproof cover according to any one of the above, further comprising a terminal receiving hole for receiving a terminal of the plug, wherein the terminal is received in the terminal receiving hole. A guide body detachably attached to the distal end of the plug, and a tapered guide surface formed on the outer surface of the guide body and serving as a guide when the waterproof cover for the plug is mounted on the plug. It is characterized by the following.

When the waterproof cover for a plug is mounted on a plug for indoor use, the mounting guide is attached to the tip of the plug, and the tapered guide surface of the guide body of the mounting guide causes the waterproof cover for the plug to be mounted. Because the base end side of the plug can be easily expanded, the plug waterproof cover can be easily attached to the plug. After the plug waterproof cover is attached to the plug, the terminal of the plug can be protected by attaching a mounting guide to the tip of the plug.

According to a sixth aspect of the present invention, in the guide for mounting the waterproof cover for a plug according to the fifth aspect, the distal end portion of the guide body is large enough to be inserted into the flared portion of the waterproof cover for a plug according to the third aspect. It is characterized by having been set to. According to this, when attaching the plug waterproof cover to the plug, the base end side of the plug waterproof cover becomes easy to spread, and the plug waterproof cover becomes easy to attach.

According to a seventh aspect of the present invention, in the guide for mounting the waterproof cover for a plug according to the fifth or sixth aspect, the outer dimensions of the base end of the guide body are different from the outer dimensions of the front part of the plug body in the plug. The feature is that they are set to be almost the same. According to this, when attaching the plug waterproof cover to the plug, a step is hardly formed between the base end of the guide main body and the front part of the plug main body, so that the plug waterproof cover is easily attached.

The invention according to claim 8 is a method for attaching a waterproof cover for a plug to a plug for indoor use provided at the tip of an electric cord in order to achieve the third object. At the tip of the plug, attach a tapered mounting guide to accommodate the terminal of the plug, and then
The plug waterproof cover is mounted on the plug so as to cover the plug using the mounting guide as a guide. According to this, when the plug waterproof cover is mounted on the indoor specification plug, the tapered mounting guide is used, so that the plug waterproof cover can be easily mounted on the plug by the guide of the mounting guide. become.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. First, in FIGS. 1 to 3, an outlet 12 is provided on the back side (right side in FIGS. 1 and 2) of the outlet support plate 11 of the cord reel. Two insertion holes 13 are formed corresponding to the receiving terminals. The cord reel provided with the outlet 12 is of a waterproof type, and has both sides of the outlet support plate 11 and the outlet 12.
Are covered with a molding material 14 made of synthetic resin or rubber.

On the front side of the outlet support plate 11,
A cylindrical receiving port 15 is provided so as to surround the two insertion holes 13, and the receiving port 15 is integrally formed by the molding material 14. In addition, receiving port 15
Inside, the front surface of the outlet support plate 11 is exposed. The molding material 14 on the front side and the molding material 14 on the back side of the outlet support plate 11 are connected through a through hole 16 formed in the outlet support plate 11. A fitting recess 15 a is formed in the inner peripheral portion of the receptacle 15 so as to gradually expand from the middle portion in the front-rear direction toward the outlet support plate 11 side.

On the other hand, the plug 17 is provided, for example, at the tip of an electric cord 18 connected to a power tool (not shown), and is of a normal indoor specification which is not waterproof. The plug body 19 of the plug 17 is formed of resin provided so as to cover the base ends of the two terminals 20 for insertion. Front part 19 of plug body 19
a is formed in a rectangular shape long in the direction in which the terminals 20 are arranged, and a flange portion 19b is formed on an outer peripheral portion of a front portion 19a thereof.
Further, a cord covering portion 21 for covering the electric cord 18 is provided on the base end side (the left side in FIGS. 1 and 2) of the plug body 19.
Are integrally formed.

The cover main body 23 of the plug waterproof cover 22 detachably attached to the plug 17 is in a state before being attached to the plug 17, as shown in FIGS.
As shown in (a), the base end 23a (FIGS. 3 and 4)
On the left side in (a)), it has a substantially cylindrical shape having a constricted portion 24 which is more squeezed than other portions. Base end 23
On the a side, a trumpet-like portion 25 that extends in a trumpet shape from the constricted portion 24 to the left end in the drawing is integrally formed. A fitting projection 26 forming a fitting portion is formed integrally with the outer periphery of the distal end portion 23b of the cover main body 22 over the entire periphery, and the plug 17 is provided on the inner peripheral side of the distal end portion 23b. A recess 27 for receiving the flange portion 19b is formed.

In this case, for example, NBR (nitrile-butadiene rubber) is used so that the tip portion 23b side of the cover main body 22 from the axial middle portion is thicker and relatively harder than the base end portion 23a side. On the other hand, the base end 23a side is formed of, for example, natural rubber so as to be thin and have high elasticity. Therefore, the plug waterproof cover 22 is formed by so-called two-color molding of NBR and natural rubber.

3 and 4, the mounting guide 28
Is made of a synthetic resin having relatively high hardness and good surface slippage, for example, polypropylene. The guide body 29 of the mounting guide 28 is
A terminal accommodating hole 30 for accommodating the two terminals 20. The terminal accommodating hole 30 accommodates the two terminals 20, and is detachably attached to the distal end of the plug 17. ing. A guide surface 31 having a tapered shape is formed on the outer surface of the guide main body 29, and the mounting guide 28 is formed in a substantially quadrangular pyramid shape.

In this case, the tip portion 29a of the guide body 29
Is set smaller than the inner diameter A2 of the end of the flared portion 25 of the plug waterproof cover 22 at the widening side, and the distal end portion 29a of the guide body 29 is inserted into the flared portion 25. The size is set to obtain.
Also, the outer dimension B1 of the base end portion 29b of the guide body 29
Is a front portion 19a of the plug body 19 in the plug 17
(In this case, the flange portion 19b) is set to be substantially the same as the outer dimension B2.

Next, the operation of the above configuration will be described. First, a method of attaching the plug waterproof cover 22 to the indoor specification plug 17 will be described mainly with reference to FIG. When the plug waterproof cover 22 is mounted on the plug 17 of the indoor specification, first, as shown in FIG. 4A, the mounting guide 28 is inserted, and both terminals 20 of the plug 17 are inserted into the terminal receiving holes 30 thereof. It is attached to the tip of the plug 17 so as to be accommodated. At this time, since the outer dimension B1 of the base end portion 29b of the guide body 29 and the outer dimension B2 of the front portion 19a of the plug body 19 in the plug 17 are set to be substantially the same, the base size of the guide body 29 is set. The end portion 29b and the flange portion 19b of the plug main body 19 are substantially connected to each other,
There is almost no step between them.

Next, the proximal end 2 of the plug waterproof cover 22
The trumpet-like portion 25 on the 3a side is applied to the front end portion 29a of the mounting guide 28 from the front (see FIG. 4A).
2 base end portion 23a (trumpet portion 25 and constricted portion 24)
Push the waterproof cover 22 for the plug 17
Push into the side. At this time, in order to improve the sliding of the plug cover 22, if the guide surface 31 is coated with soapy water or the like, it can be easily pushed.

When the proximal end 23a of the plug waterproof cover 22 reaches the vicinity of the proximal end 29b of the mounting guide 28, the proximal end 23a of the plug waterproof cover 22 (the horn portion 25 and the constricted portion) is formed. 24), the plug waterproof cover 22 is pushed in until the base end 23a reaches the vicinity of the electric cord 18. Thus, as shown in FIG. 4B, the plug 17 can be provided with the plug waterproof cover 22 so as to cover the plug 17. When the plug waterproof cover 22 is attached,
The inner peripheral portion of the constricted portion 24 at the base end portion 23a of the plug waterproof cover 22 is in close contact with the outer peripheral portion of the electric cord 18 over the entire circumference, and the front flange portion 19b of the plug main body 19 is provided with a plug waterproof portion. It can be received in the concave portion 27 of the tip portion 23b of the cover 22. At this time, the flange 19b of the plug main body 19 does not necessarily need to be received in the recess 27.

Next, such a plug waterproof cover 22 will be described.
The procedure for connecting the plug 17 equipped with the plug to the waterproof outlet 12 will be described mainly with reference to FIGS. 1 and 2. In order to connect the plug 17 with the plug waterproof cover 22 to the waterproof outlet 12, the mounting guide 28 is detached from the plug 17 as shown in FIG. Then, each terminal 20 of the plug 17 is connected to the outlet 1
The front side faces the respective insertion holes 13 on the two sides, and is inserted into the outlet 12 through the insertion holes 13.
Into the socket 15 on the outlet 12 side.
a (see FIG. 2). Accordingly, the fitting projection 2
6 fits tightly over the entire inner periphery of the receptacle 15 over the entire periphery.

As shown in FIG. 2, the terminal 20 of the plug 17 is connected to the outlet 12 and the plug waterproof cover 2 is connected.
In the state where the fitting projection 26 of FIG. 2 is fitted to the inner peripheral portion of the receptacle 15, even if water is applied to the plug waterproof cover 22 and the receptacle 15 from the outside, the water is supplied to the plug 17 and the outlet. 12 can be prevented from entering the connection portion. Thereby, even if the plug 17 is for indoor use, the waterproof function can be obtained.

According to the above-described embodiment, the following effects can be obtained. First, since the plug 17 of the present invention can be used as a waterproof plug simply by attaching the plug waterproof cover 22 of the present invention to the plug 17 of the indoor specification, unlike the case where the plug is replaced, the plug 17 of the indoor specification is
It can be easily used as a waterproof plug. Further, since the plug waterproof cover 22 is detachable, it can be removed from the plug 17 when it becomes unnecessary.

In this case, the distal end 23b of the cover main body 23 of the plug waterproof cover 22 is formed to have relatively high hardness.
The fitting projection 26 of 3b can be easily fitted to the socket 15 on the outlet 12 side, and the state of close contact with the socket 15 can be maintained well.

Since the base end 23a of the cover body 23 is formed so as to have high elasticity, when the plug waterproof cover 22 is mounted on the plug 17, the base end 23a of the cover body 23 may be used. The sides are easy to spread and easy to wear.
Moreover, in the mounted state, the base 2
The constricted portion 24 of 3a is easily brought into close contact with the outer peripheral portion of the electric cord 18. Further, the presence of the constricted portion 24 on the base end portion 23a side of the cover main body 23 makes it easy to adhere to the outer peripheral portion of the electric cord 18. In addition, since there is a trumpet-shaped portion 25 that spreads in a trumpet shape from the constricted portion 24, the constricted portion 2
There is an effect that the constricted portion 24 is less likely to be torn when the 4 is expanded.

Here, there are plugs of indoor specifications in which the shape and size of the tip of the plug body are variously different, and those with and without the flange portion 19b and the flange portion even if the flange portion 19b is provided. Some have large or small protrusions.
Therefore, in the present embodiment, by providing the concave portion 27 for escape at the distal end portion 23b of the cover main body 23, even if the shape and size of the distal end portion of the plug main body 19 are different, it is possible to cope with the reason. become.

When the waterproof cover 22 for a plug is mounted on the plug 17 for indoor use, the mounting guide 28 of the present invention is mounted on the tip of the plug 17, and the tapered guide surface of the mounting guide 28 is provided. With 31, the base end 23 a side of the plug waterproof cover 22 can be easily expanded, so that the plug waterproof cover 22 can be easily attached to the plug 17. After attaching the plug waterproof cover 22 to the plug 17, the attachment guide 28 is attached to the tip of the plug 17 so that the plug 1
7 terminal 20 can be protected.

In this case, in the mounting guide 28, the tip portion 29a of the guide body 29 is set to a size that can be inserted into the flared portion 25 of the plug waterproof cover 22. When the cover 22 is attached, the proximal end 23a side of the plug waterproof cover 22 is easily spread, and the plug waterproof cover 2
2 becomes easier to wear.

Further, the outer dimension B1 of the base end portion 29b of the guide body 29 is set to be substantially the same as the outer dimension B2 of the front portion 19a of the plug body 19 in the plug 17, so that the plug 17 When attaching the waterproof cover 22, it is difficult to form a step between the base end portion 29 b of the guide body 29 and the front portion 19 a of the plug body 19,
It becomes easy to attach the plug waterproof cover 22.

FIG. 5 shows a second embodiment of the present invention. The second embodiment differs from the first embodiment in the following points. That is, a terminal housing hole 37 and a ground terminal housing hole 38 smaller than the terminal housing hole 37 are formed in the guide body 36 of the mounting guide 35, and a tapered guide surface 39 is formed on the outer surface of the guide body 36. The guide body 36 is formed in a substantially conical shape with the chamfered portion 40 being formed. A cylindrical portion 41 is formed at the distal end portion 36 a of the guide body 36, and a through hole 42 is formed in the cylindrical portion 41.

In this case, the tip 36a of the guide body 36
The outer dimension A3 of the cylindrical portion 41 is set to be sufficiently smaller than the flared portion 25 of the plug waterproof cover 22 and substantially the same as the inner diameter of the constricted portion 24. Therefore, also in this case, the distal end 3
6a is a flared portion 2 of the plug waterproof cover 22.
5 is set to a size that can be inserted. The outer dimension B3 of the base end portion 36b of the guide body 36 is
Is set to be substantially the same as the outer dimension B2 of the front portion 19a of the plug body 19 in FIG.

In the above configuration, when the plug waterproof cover 22 is attached to the plug 17, the following is performed.
First, the through hole 42 at the tip of the mounting guide 35
Through a string (not shown). Then, the mounting guide 35 is attached to the distal end portion of the plug 17 such that both terminals 20 of the plug 17 are received in the terminal receiving holes 37 of the mounting guide 35. At this time, if the plug 17 has an earth terminal, the earth terminal is accommodated in the earth terminal accommodation hole 38.

Next, the guide body 36 is passed while passing the distal end of the cord from the flared portion 25 of the plug waterproof cover 22 through the constricted portion 24 and the cover body 23.
Is relatively inserted into the constricted portion 24 from the trumpet-shaped portion 25. Then, while pulling the string protruding toward the distal end of the cover main body 23, the waterproof cover 22 for the plug is pulled.
Into the plug 17 side. Then, the plug waterproof cover 22 is pushed into the plug 17 while the base end 23 a of the cover main body 23 is turned upside down and is spread along the guide surface 41. Then, by pushing the plug waterproof cover 22 until the base end 23a of the cover body 23 reaches the vicinity of the electric cord 18, the plug waterproof cover 22 is covered with the plug 17 in a manner similar to the first embodiment. The cover 22 can be attached (FIG. 4B)
reference). In the second embodiment, there is an advantage that the mounting guide 35 can cope with both the plug 17 having no ground terminal and the plug having the ground terminal.

In this case, the mounting guide 35 is
When the plug 17 is not used, it is attached to the electric cord 18 using the string passed through
By attaching 5 to the tip of plug 17, mounting guide 35 can be used as a protector for terminal 20.

The present invention is not limited to the above embodiments, but can be modified or expanded as follows. The proximal end 23a of the plug waterproof cover 22 is
The plug 17 may be configured to be in close contact with the cord cover 21 on the base end side of the plug body 19. Further, in a state where the plug waterproof cover 22 is attached to the plug 17, the base end 23a of the plug waterproof cover 22 does not have to be turned upside down.

[0046]

As is clear from the above description, according to the present invention, the following effects can be obtained. Claim 1
According to the described plug waterproof cover, it is possible to use it as a waterproof plug simply by attaching the plug waterproof cover to an indoor plug, so unlike indoor replacement plugs, indoor plugs Can easily be used as a waterproof plug. Further, since the plug waterproof cover is detachable, it can be removed from the plug when it becomes unnecessary.

According to the plug mounting guide of the fifth aspect, when the plug waterproof cover is mounted on the plug of the indoor specification, the tapered guide surface of the guide main body of the mounting guide is used. Since the proximal end side of the plug waterproof cover can be easily expanded, the plug waterproof cover can be easily attached to the plug.

According to the eighth aspect of the present invention, when the waterproof cover for a plug is mounted on a plug for indoor use, a tapered mounting guide is used, whereby the mounting guide for the plug can be used. With the guidance, the waterproof cover for the plug can be easily attached to the plug.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, and is a cross-sectional view of a state in which a plug provided with a plug waterproof cover is not connected to an outlet.

FIG. 2 is a sectional view showing a state in which a plug with a waterproof cover for a plug is connected to an outlet.

FIG. 3 is an exploded perspective view.

4A and 4B are views for explaining a procedure for attaching a plug waterproof cover to a plug, wherein FIG. 4A is a cross-sectional view of a state before mounting, and FIG.

FIG. 5 is an exploded perspective view of a main part showing a second embodiment of the present invention.

FIG. 6 is a sectional view showing a state where a waterproof plug is connected to a waterproof outlet.

FIG. 7 is a sectional view showing a state in which a plug for indoor use is connected to an outlet for waterproof use.

[Explanation of symbols]

In the drawing, 12 is an outlet, 13 is an insertion hole, 14 is a molding material, 15 is a receptacle, 17 is a plug for indoor specification, 1
8 is an electric cord, 19 is a plug body, 19a is a front part, 2
0 is a terminal, 22 is a plug waterproof cover, 23 is a cover body, 23a is a base end, 23b is a tip end, 24 is a constricted part, 25 is a trumpet-shaped part, 26 is a fitting convex part (fitting part), 2
7 is a concave portion, 28 is a mounting guide, 29 is a guide body, 2
9a is a distal end, 29b is a proximal end, 30 is a terminal receiving hole, 3
1 is a guide surface, 35 is a mounting guide, 36 is a guide body, 36a is a distal end portion, 36b is a base end portion, 37 is a terminal receiving hole, 38 is a ground terminal receiving hole, and 39 is a guide surface.

Claims (8)

[Claims] 1. An indoor plug provided at the distal end of an electric cord, which is detachably mounted so as to cover the indoor plug, and a base end of which is attached to an outer peripheral portion of a base end of the plug or an outer peripheral portion of the electric cord. A cylindrical cover body that is in close contact with the entire circumference and has an open end, and a cylindrical socket provided on the end of the cover body and having the plug connected to a waterproof outlet, on the outlet side. A watertight cover for a plug, comprising: an inner peripheral portion of the plug; 2. The waterproof cover for a plug according to claim 1, wherein the cover body has a relatively high hardness at a front end portion and a high elasticity at a base end portion. 3. A base portion of the cover body having a constricted portion closely contacting an outer peripheral portion of a base end portion of the plug or an outer peripheral portion of an electric cord connected to the plug, and forming a trumpet shape from the constricted portion. 3. The waterproof cover for a plug according to claim 2, wherein the waterproof cover has a flared portion. 4. The waterproof cover for a plug according to claim 1, wherein a concave portion for releasing the plug is provided at a distal end portion of the cover main body. 5. A mounting guide used when mounting the waterproof cover for a plug according to any one of claims 1 to 4 on a plug of indoor specification, wherein the terminal receiving hole receives a terminal of the plug. A guide body detachably attached to the distal end of the plug with the terminal housed in the terminal housing hole, and the plug waterproof cover formed on the outer surface of the guide body and attached to the plug A guide for mounting a waterproof cover for a plug, comprising: a tapered guide surface serving as a guide when the plug is sealed. 6. The waterproof cover for a plug according to claim 5, wherein a tip end of the guide body is set to a size that can be inserted into the flared portion of the waterproof cover for a plug according to claim 3. Guide for mounting. 7. An outer dimension of a base end portion of the guide body is set to be substantially the same as an outer dimension of a front portion of the plug body in the plug.
Or a guide for mounting the waterproof cover for a plug according to 6. 8. A method of attaching a plug waterproof cover to a plug for indoor use provided at a tip of an electric cord, the tip of the plug being tapered so as to accommodate a terminal of the plug. A method for mounting a waterproof cover for a plug, comprising: mounting a mounting guide; and thereafter, mounting the waterproof cover for the plug on the plug using the mounting guide as a guide.