JPH08255651A - Power source plug - Google Patents

Abstract

PURPOSE: To suppress the cut of a lead wire and allow a plurality of connection repairs. CONSTITUTION: Denoted at 1 is a power source plug, and it is formed of a synthetic resin plug body 2, plug terminals 3, 3, a cord 4, and an earthing lead wire 5 having a clip not shown on the top end, which are integrally molded. A cord guard 6 as a reinforcing part is extended in the connecting part between the plug body 2 and the cord 4. The cord guard 6 has a thin sheathing part 7 for covering the lead wire 5, which is integrally molded from the plug body 2 along the cord guard 6, whereby the lead wire 5 is drawn from the outlet 7a on the rear end side of the cord guard 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power plug provided in electric equipment such as an electric power tool for connection with an external power source.

[0002]

2. Description of the Related Art Some of the above power plugs are provided with a grounding lead wire from a plug body and a grounding clip at its tip for tools and machinery requiring grounding. The grounding lead wire in the power cord is partially embedded in the plug body so that it extends along the power cord from the back of the plug body when the plug body is molded integrally with the power cord. Since the drawn part of is free, it may be bent near the outlet from the plug body and the part is easily damaged, and if the damage progresses, the lead wire may be cut,
As in the conventional power plug 10 of FIG.
The holder 14 is wound around, and the lead wire 13 is fixed by the holder 14 at a position apart from the outlet from the plug body 11, and the force applied to the lead wire 13 is changed to the fixing portion of the holder 14, by any chance. Even if the wire is broken or damaged, the fixed portion will be broken or damaged, and if the wire is broken, the lead wire 1 on the broken side as shown in FIGS. 3B and 3C.
3 was passed through the holder 14 again, and the connection between the remaining plug body 11 and the plug body 11 was repaired.

[0003]

However, the above-mentioned holder 1
In No. 4, the lead wire 13 is merely cut or the damaged portion is changed, and the load on the lead wire 13 is concentrated on one place. Therefore, the problem that the lead wire 13 is cut cannot be eliminated. If the holder 14 is cut open for connection repair, the next wire break will be near the outlet from the plug body 11, and connection repair cannot be performed again. In this case, it is necessary to cut the cord 12 and replace it with a new commercially available plug, which is very troublesome.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention provides a power supply plug which prevents disconnection of a grounding lead wire as much as possible, and can perform connection repair several times even if disconnection or damage occurs. The configuration is
First, as a first aspect of the present invention, a thin outer covering portion for covering a lead wire is extended to a predetermined length in a plug body, and the outer covering portion is integrated along a power cord. Is. If the power cord has a thick-walled reinforcing portion formed at the connecting portion with the plug body, the outer covering portion may be integrated with the reinforcing portion. On the other hand, the second invention is characterized in that the power cord is intermittently provided with a plurality of holding portions for holding the lead wires along the power cord for a predetermined length. Further, when the power cord has a thick reinforcing portion formed at a connecting portion with the plug body, the holding portion may be provided so as to project from the reinforcing portion.

[0005]

According to the first aspect of the invention, since the lead wire is held along the power cord by the thin outer jacket portion, the load on the lead wire is dispersed and the wire is less likely to be broken, and even if the wire is broken, Because it breaks at the outlet of the lead wire from the jacket,
You can easily cut open the jacket and repair the connection many times. Further, when the outer covering portion is integrated with the reinforcing portion formed on the power cord, the stress is dispersed in the reinforcing portion, so that the effect of preventing the disconnection of the lead wire becomes better. On the other hand, according to the second aspect of the present invention, the load on the lead wire is also dispersed by the plurality of holding portions along the power cord, so that disconnection is unlikely to occur. Since it happens at, you can cut the holding part there and repair the connection, and you can repair the connection several times. Further, when the holding portion is provided so as to project from the reinforcing portion formed on the power cord, the stress is dispersed in the reinforcing portion, so that the effect of preventing the disconnection of the lead wire becomes better.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 In FIG. 1 (A), reference numeral 1 is a power plug, which is a plug body 2 made of synthetic resin, plug terminals 3 and 3, a cord 4, and a grounding lead wire 5 having a clip (not shown) at the tip. Are integrally molded, and a cord guard 6 as a reinforcing portion is formed at the connecting portion between the plug body 2 and the cord 4. Further, the cord guard 6 is integrally formed with a thin outer wall portion 7 for covering the lead wire 5 from the plug body 2 along the cord guard 6, whereby the lead wire 5 terminates at the cord guard 6. It will be pulled out from the side exit 7a.

Therefore, the power plug 1 configured as described above
In the above, since the lead wire 5 is covered by the thin outer jacket portion 7 along the cord guard 6, even if the cord 4 is pulled while being connected to the outlet, the lead wire 5
Force can be dispersed, and cutting of the lead wire 5 can be made difficult to occur. Even if a wire breakage occurs, the lead wire 5
Even if they are damaged, they are generated on the tip side from the outlet 7a from the outer covering part 7, and therefore, as shown in FIG.
As shown in (C), the thin-walled outer cover 7 can be easily peeled off by hand or pliers, the lead wire 5 can be connected again with the solder 9 or the connecting metal fitting, and the connecting portion can be wound with an insulating tape or the like for easy repair. can do. After that, even if the wire is re-broken, the remaining length of the jacket 7 can be repaired, so that the repair can be performed several times by the same procedure as above. Further, the outer cover 7 is
When molding the power plug 1, the plug body 2 and the cord guard 6
Since it is integrally molded together with it, it can be manufactured by a simple change of the mold, which does not lead to an increase in cost. Although the outer casing 7 formed first has the same length as the cord guard 6, it may be longer or shorter than the cord guard 6, and does not have the same thickness. It may be formed so that it gradually becomes thinner as it goes to the side. Further, the above embodiment is a power plug in which a reinforcing portion such as a cord guard is formed, in which case the lead wire is integrated with the connecting portion of the cord reinforced by the cord guard,
Although a more preferable disconnection preventing effect can be obtained, if the reinforcing portion is not provided, the cord and the outer covering portion may be integrally formed.

Embodiment 2 FIG. 2 (A) shows an embodiment of the second invention, but the same reference numerals as those in the above-mentioned Embodiment 1 indicate the same parts, and the explanation thereof will be omitted. Here, four holding portions 8 are provided on the side of the cord guard 6.
a to d are projected, and these holding portions 8 a to 8 d are
The lead wire 5 drawn from the plug body 2 is integrally molded so as to be held along the cord guard 6. Therefore, also in the power plug 1a, since the lead wire 5 is elastically held by the holding portions 8a to 8d, the effect of dispersing the force to the lead wire 5 and suppressing the disconnection can be maintained, of course. Since disconnection and damage also occur at the holding portion 8a farthest from the plug body 2, in this case also, as shown in FIGS. 2B and 2C, the holding portion 8a is cut open and the lead wires 5 are soldered 9 or the like. Just repair the connection,
The next disconnection or the like will be at the holding portion 8b, and the connection can be repaired at least three times up to 8c. Further, as in the case of the first embodiment, since the manufacturing can be performed by simply changing the mold, it can be easily realized at low cost. In the above embodiment, the number of holding portions can be increased or decreased and the lead wire holding form can be changed as appropriate. Again, the holding portion is provided in the reinforcing portion such as the cord guard to provide a wire breakage prevention effect. If there is no part, the holding part can be formed directly on the cord.

[0009]

As described above, according to the first aspect of the present invention, since the lead wire is protected along the power cord by the thin-walled outer covering portion, disconnection is less likely to occur and durability is improved. In addition, even if a wire breakage or damage occurs, the thin-walled jacket portion can be easily cut open to repair the connection many times. Further, since the molding is easy, there is no cost. Further, if the outer covering portion is integrated with the reinforcing portion formed on the power cord, the effect of preventing the disconnection of the lead wire becomes better. On the other hand, also in the second aspect of the invention, since the load on the lead wire is relieved by the bending of the power cord, the stress is dispersed and the disconnection is less likely to occur, and the durability can be expected to be improved. In addition, even if a wire breakage or damage occurs, it is sufficient to cut open only the holding portion therefor for connection repair, and therefore connection repair can be performed as many times as the number of holding portions provided. Of course, the same cost effect can be obtained as in the first aspect of the invention, and if the reinforcing portion formed on the power cord is provided with the holding portion in a protruding manner, the effect of preventing the disconnection of the lead wire becomes better.

[Brief description of drawings]

FIG. 1A is an explanatory diagram of a power plug according to a first embodiment. (B) is an explanatory diagram of the power plug of the first embodiment. (C) It is explanatory drawing of the power supply plug of Example 1.

FIG. 2A is an explanatory diagram of a power plug according to a second embodiment. (B) It is explanatory drawing of the power plug of Example 2. (C) It is explanatory drawing of the power plug of Example 2.

FIG. 3A is an explanatory diagram of a conventional power plug. (B) It is explanatory drawing of the conventional power plug. (C) It is explanatory drawing of the conventional power plug.

[Explanation of symbols]

1 ... Power plug, 2 ... Plug body, 3 ... Plug terminal, 4 ... Lead wire, 5 ... Cord, 6 ... Code guard, 7 ... Outer cover part, 8a-b ... Holding part

Claims (4)

[Claims] 1. A power plug in which a lead wire for grounding is pulled out from a plug body connected to an end of a power cord, wherein a thin jacket portion for covering the lead wire is provided on the plug body. A power plug characterized by extending the length and integrating the outer cover part along the power cord. 2. The power plug according to claim 1, wherein the power cord has a thick reinforcing portion formed at a connecting portion with the plug body, and the outer covering portion is integrated with the reinforcing portion. . 3. A power plug in which a lead wire for grounding is drawn from a plug body connected to an end of the power cord, wherein the lead wire is held on the power cord for a predetermined length along the power cord. A power plug characterized in that a plurality of holding portions are provided intermittently. 4. The power plug according to claim 3, wherein the power cord has a thick-walled reinforcing portion formed at a connection portion with the plug body, and the holding portion is provided to project from the reinforcing portion.