JP3079264U - Cord connection set with ground function - Google Patents

Abstract

(57) [Problem] To provide a cord connection set with a ground function that can achieve power supply connection and ground connection simultaneously and reliably with a relatively simple configuration. SOLUTION: A plug main body is formed with an annular joining projection having a tapered cross section at a periphery of a power plug terminal, and a grounding connector is annularly projected at an end thereof. In the outlet main body, an annular joint concave portion having a tapered cross section is formed at a position corresponding to the annular joint protrusion, which is located around the insertion opening of the terminal receiver provided therein. A grounding connector is provided with a receiving hole corresponding to the plug-side grounding connector.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention mainly relates to a cord connection set with a ground function.

[0002]

[Prior art]

 A generally known cord connection set with a ground function is composed of a plug having a pair of power plug terminals on a plug body and an outlet having a pair of terminal receptacles facing the plug terminal on an outlet body. A grounding connector connected to a grounding lead wire provided on a power cord is provided so as to be joined to each other. For example, Japanese Unexamined Patent Application Publication Nos. 8-255661 and 2000-182732 disclose such connectors. Numerous things have been invented or devised, such as the plug described in the publication and the outlet described in JP-A-2000-340286.

[0003] These connection sets are mainly designed to connect to a grounding lead wire in order to avoid adverse effects such as electromagnetic waves generated in electric or electronic devices. Regarding the connection state, the power supply and the ground connection are not simultaneously and reliably devised, and the measures to prevent electromagnetic waves lack high reliability. In addition, if left in a connected state for a long period of time, dust and the like may accumulate and enter the connection part, or it may cause a fire due to an accident such as being wet with water and leaking electricity.

[0004]

[Problems to be solved by the invention]

 The present invention has been made based on the above circumstances, and aims to provide a cord connection set with a ground function that can achieve power supply connection and ground connection simultaneously and reliably with a relatively simple configuration. is there.

[0005]

[Means for Solving the Problems]

 For this reason, according to the present invention, in the cord connection set with a grounding function, the plug main body is formed with an annular joint projection having a tapered cross section at the periphery of the power plug terminal and located at the tip thereof. A cross-section corresponding to the annular joint projection, wherein the grounding connector is formed in a ring shape and protrudes from the socket body, and is located around the insertion opening of the terminal receiver provided therein; Is formed with a tapered annular joint concave portion, and the grounding connector is internally provided with a receiving hole corresponding to the plug-side grounding connector at the base end side. .

[0006] In this case, the plug body is provided with a hook having elasticity and repelling outward, and a hook is provided at an opening edge of the annular joint concave portion of the outlet body corresponding to a tip of the hook. An engaging portion is formed, and the plug and the outlet are each provided with a holding portion for holding a power cord and a ground lead in a state of being insulated from each other on a back portion of the main body. Is preferred.

[0007]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. The cord connection set with an earthing function of the present invention includes a pair of power plug terminals 1, 1 provided on an electrically insulating plug body 2 made of, for example, a hard synthetic resin, and a power plug terminal 1, A receptacle C provided with a pair of terminal receivers 3 facing the power supply body 1, and a grounding connector 7 connected to a grounding lead wire 6 provided on a power cord 5, respectively. 8 are fitted to join each other.

In this embodiment, the power cord 5 is provided with electric insulating layers 5b and 5b around the power supply leads 5a and 5a, and is a braided metal thin wire around the outer periphery. The ground lead wire 6 is covered.

In this cord connection set with a grounding function, the plug main body 2 is provided with an annular joint protrusion 9 having a tapered cross section (a surface whose inner and outer circumferences are inclined) located around the power plug terminals 1 and 1. The grounding connector 7 is formed at the end of the connecting member, and protrudes in an annular shape.

In addition, the outlet body 4 has a tapered cross section (a surface whose inner and outer circumferences are inclined) corresponding to the annular joint protrusion 9, which is located around the insertion opening of the terminal receivers 3, 3 provided therein. An annular joint recess 10 is formed, and a grounding connector 8 is provided at the base end thereof with a receiving hole 8a corresponding to the grounding connector 7 on the plug side.

In this embodiment, the plug body 2 is provided with hooks 11 which are located on the left and right sides thereof and which are repelled outward by the elasticity of the material (which may be located on the upper and lower sides). A hook engaging portion 12 is formed at the opening edge of the annular joint concave portion 10 of the outlet main body 4 corresponding to the tip of the hook 11. In FIGS. 1 and 2, the hook engaging portion 12 is formed to extend over the inner edge and the outer edge of the opening of the annular joint concave portion 10, but the hook engaging portion 12 is formed at the inner edge of the opening of the annular joint concave portion 10. The plug body 2 may be formed so as to be located only on the taper surface. In this case, as shown in FIG. Adaptably, it can be provided on the four tapered surfaces of the inner edge of the opening of the annular joint recess 10.

Further, the plug P and the outlet C respectively hold the power cord 5 and the grounding lead wire 6 on the back of the main body while being insulated from each other. Such or a known holding portion 13 is formed.

In such a configuration, when the plug P is connected to the outlet C, when the plug terminals 1 are inserted into the terminal receivers 3, the annular joint protrusions 9 guide the annular joint recesses 9 into the guides 9. The earth connector 7 is guided to the receiving hole 8a of the earth connector 8 by the function of, and a reliable connection with the earth connector 8 can be achieved simultaneously with the connection of the power supply terminal at an accurate position. .

1 to 4 show a case where the outlet C is of a type adapted to a single plug P, it may be a tap-type outlet to which a plurality of plugs P can be connected. Alternatively, it may be an embedded type that is embedded in a wall or the like so that a plurality of plugs P can be connected, or a box-type outlet that is provided to protrude from the wall. Further, it can be modified in various forms, such as providing a plug portion having the same form as the plug P on one side surface of the tap-type outlet to form a plurality of tap-type outlets so as to be connectable to form a connection tap-type outlet. .

[0015]

[Effect of the invention]

 The present invention has been described in detail above. In a cord connection set with a grounding function, an annular joint protrusion having a tapered cross section is formed on a plug body around a power plug terminal. In the outlet body, a grounding connector is located around the insertion opening of the terminal receiver provided therein and corresponds to the annular joint projection. Is formed at the base end side thereof with a receiving hole corresponding to the grounding connector on the plug side.

Therefore, the power supply connection and the ground connection can be achieved simultaneously and reliably with a relatively simple configuration, and the intrusion of dust or the like into the terminal receiving portion of the power plug terminal can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is also a cross-sectional plan view.

FIG. 3 is a vertical sectional side view.

FIG. 4 is a schematic configuration diagram of an outlet main body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power plug terminal 2 Plug main body 3 Terminal receiver 4 Outlet main body 5 Power cord 5a Power lead wire 5b Electrical insulating layer 6 Ground lead wire 7, 8 Ground connector 8a Receiving hole 9 Annular joint protrusion 10 Annular joint concave portion 11 Hook 12 Hook engaging part 13 Holding part

Claims (3)

[Utility model registration claims] 1. A plug having a pair of power plug terminals provided on a plug body and an outlet provided with a pair of terminal receptacles facing the plug terminal on an outlet body, each of which is provided with a ground provided on a power cord. In a cord connection set with an earthing function provided so that earthing connectors connected to the lead wires are joined to each other, the plug body has a tapered cross section located around a power plug terminal. An annular joint projection is formed, and located at the tip thereof, the grounding connector is formed in an annular shape and protruded, and the outlet body is located around an insertion port of the terminal receiver provided therein. And corresponding to the annular joining projection,
An annular joint concave portion having a tapered cross section is formed, and on the base end side, the grounding connector is provided with a receiving hole corresponding to the plug-side grounding connector, and is internally provided. Cord connection set with earth function. 2. The plug body has a hook having elasticity and rebounding outward, and a hook engaging part is formed at an opening edge of an annular joint recess of the outlet body corresponding to a tip of the hook. The cord connection set with a ground function according to claim 1, wherein a joining portion is formed. 3. The plug and the outlet each have a holding portion for holding a power cord and a ground lead in a state insulated from each other at a back portion of the main body. Alternatively, the cord connection set with a ground function according to 2.