JPH0124869Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a plug structure, and more particularly to the structure of a three-pole plug with a ground terminal.

Conventionally used AC 100V outlets and outlet plugs are so-called two-prong plugs with two connection terminals, but recently, grounding of devices has become popular due to the increasing precision of electronic devices and the protection of human bodies. Recently, two-pole plugs with a ground wire and three-pole plugs with a ground terminal have been used for this purpose. Perspective views of this type of conventionally used plug are shown in FIGS. 1 and 2.

In the figure, 1 is an electric wire cable, 2 is a plug body made of molded resin, 3 is a connecting terminal that is electrically connected to each core wire of the electric wire cable 1 and whose position is regulated by the plug body 2, and 4 is an electric wire. A ground terminal lead wire 5 connected to the other cable 1 is a ground terminal formed by an alligator clip or the like connected to the tip of the lead wire 4. Further, reference numeral 6 in the figure indicates a ground terminal embedded in the plug body 2 among the three connection terminals forming the three-pole plug.

Schematic perspective views of outlets corresponding to these plugs are shown in FIGS. 3 and 4.

In each figure, 7 indicates the outlet body, 8 indicates a terminal insertion hole provided corresponding to a pair of connection terminals on the plug side arranged in parallel, and 9 in Fig. 4 indicates a hole formed near the insertion hole 8. This is a terminal insertion hole corresponding to the ground terminal 6 of the plug shown in FIG.

The 3-prong plug shown in Figure 2 allows for reliable and automatic grounding when the plug is inserted into an outlet. Currently, two-prong outlets are installed as shown in Figure 3.

For this reason, when using a device with a 3-prong plug using a 2-prong outlet, you must prepare and use a separate adapter to convert the 3-prong to 2-prong + ground terminal. If not, there is a drawback that the device cannot be operated.

This invention was created in view of the above-mentioned drawbacks, and its purpose is to improve the structure of the 3-prong plug itself and create a new plug that can be used with a 2-prong outlet without the need for an adapter or other separate item. It's about making it happen.

The object of the present invention is to provide a plug body equipped with a pair of connecting terminals arranged parallel to each other at a predetermined interval, and a square-shaped slide member that is slidable in a recess provided at a predetermined position of the plug body. This is achieved by a plug with a ground terminal, which is characterized by having a ground terminal fixed to the slide member through the plug body and a through hole.

The present invention will be explained below using the drawings.

FIGS. 5 and 6 are explanatory diagrams of an embodiment of a plug with a ground terminal according to the present invention.

In the figure, reference numeral 11 denotes a square-shaped slide member that is slidable in a recess provided at a predetermined position of the plug body. 12 is a screw for connecting the ground terminal lead wire attached to the slide member, 13 is a pair of connection terminals embedded and fixed in the plug body 10, and 14 is a screw connected through a through hole penetrating the plug body. A ground terminal 15 fixed to the slide member 11
1 is a lead wire for drawing out the ground terminal, and 16 is a ground terminal made of an alligator clip or the like.

As can be seen from both figures, the plug according to the present invention is configured such that the ground terminal 14 slides along its axial direction. Therefore, for the three-prong outlet shown in FIG. 4, the ground terminal 14 is inserted into the ground terminal connection hole 9 as is, while the
For the two-prong outlet shown in the figure, the tip of the ground terminal 14 is in contact with the surface of the outlet 7,
By further pushing the plug body 10, it is pushed upward. This state is shown in FIG. here,
If the side surface of the slide member 11 pushed upward, the recess of the plug body that accommodates the slide member 11, or the ground terminal exposed from the recess is colored in a color that can be distinguished from the color of the plug body,
It can be easily determined that the plug is not connected to ground.

Furthermore, the slide member 11 has a ground terminal 16.
Since it has a screw 12 for electrically engaging a lead wire 15 for connecting to the outside, it can be easily connected to an external ground terminal.

As explained above, according to the present invention, it is possible to realize a plug that can be directly connected to a two-pole outlet without using an adapter or the like.
Further, even after the plug is inserted, the type of outlet inserted can be easily determined based on the state displacement of the slide member. Furthermore, by coloring the slide member and the like, it is possible to further easily distinguish the slide member.

In addition, if a spring for restoring the sliding member is built into the fitting part between the sliding member and the plug body to prevent the sliding member from protruding when it is pulled out from the outlet, it will be easier to operate and handle the plug. It can be done easily.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views showing conventional plug structures, Figures 3 and 4 are perspective views showing various types of outlets, and Figures 5 and 6 are one embodiment of the plug according to the present invention. This is an example. In the figure, 10 is a plug body, 11 is a slide member, 13 is a pair of connection terminals, and 14 is a ground terminal.

Claims (1)

[Scope of utility model registration request] A plug body including a pair of connecting terminals arranged in parallel with a predetermined distance apart, a square-shaped slide member that is slidable in a recess provided at a predetermined position of the plug body; A plug with a ground terminal, comprising a ground terminal fixed to the slide member through a through hole.