JP3144067U - Extension cord - Google Patents

Abstract

An extension cord capable of obtaining a power supply outside a building by inserting a gap having unevenness between window frames is provided.
An extension cord (1) comprises a plug side cord portion (2), an outlet side cord portion (3), and a central cord portion (4) connecting between the plug side cord portion (2), and the plug side cord portion (2) and the outlet side cord portion (3) insulate a two-core conductor. The central cord portion 4 is made of three bare soft copper wires each having flexibility, and two sets of conductors arranged side by side in parallel to each other in parallel to form a flat insulating layer. The plug-side cord portion 2 and the outlet-side cord portion 3 that connect the both ends of the central cord portion 4 are respectively formed with fixtures 5. An intermediate switch 6 with a breaker is interposed.
[Selection] Figure 1

Description

  The present invention relates to an extension cord, and more specifically, has an unevenness between an aluminum sash window frame and a sash window frame that is electrically connected to a commercial power source installed in the building. The present invention relates to an extension cord that can be inserted through a gap to obtain power outside the building.

  Conventionally, various types of extension cords have been developed and are widely used in homes and offices. They are useful for each life. Usually, a plug is provided at one end, an outlet is provided at the other end, and two wires are parallel between them. The power supply can be obtained even at a location away from the power supply by connecting with a cord covered with an insulating layer.

  However, when trying to obtain power outdoors in a building that does not already have a power supply installed outdoors, the windows or doors are extended with a long extension cord from the commercial power supply in the building, and after use, I had to finish each time.

Therefore, for example, the connection cord 30 disclosed above is formed in a substantially flat shape, and two conductive wires 32, 32 are formed by insulating members 33, 33 in a flexible belt-like cord body 31. Connected to each end of the flat conductors 2 and 3, which are disposed in a covered state (see Patent Document 1), the thin covering material 6 that covers the ultra-thin flat conductors 2 and 3, and the flat conductors 2 and 3 The thing (refer patent document 2) which comprises the flat cord with an electrical connection terminal member from the electrical connection terminal member 11 is disclosed.
JP 2003-297152 A JP 2003-308739 A

  However, the one described in Patent Document 1 can be bent along the sash and the irregularities formed on the inner wall surface, but the two-core conductive wire is formed in a flat shape and arranged side by side. Furthermore, in the case of the one described in Patent Document 2, the flat conductor is formed by drawing to a very thin thickness of about 0.5 mm to 2.5 mm and a width of about 5.0 mm to 15.0 mm. Although it has flexibility, it is easy to break the integrated lead wire if it is bent repeatedly, and it can not be checked even if the cord is damaged or disconnected due to use. The danger of a short circuit is a concern.

  In view of the above problems, as a result of diligent study, the extension cord is composed of a plug-side cord portion, an outlet-side cord portion, and a central cord portion that connects between them, and the plug-side cord portion and the plug-side cord portion insulate two-conductor wires. The central cord is covered with three flexible bare copper wires in close contact with each other, and two sets of conductors arranged in parallel in a flat shape are covered in parallel with a flexible insulating layer. In addition, a fixture is formed at each connection portion of the plug side cord portion and the outlet side cord portion connecting both ends of the center cord portion, and an intermediate switch with a breaker is interposed in the plug side cord portion. It is.

  The extension cord of the present invention comprises a plug side cord portion, an outlet side cord portion, and a central cord portion connecting between them, and the central cord portion is arranged in a flat shape by adhering three flexible bare copper wires. By covering the two sets of conductors in parallel and covering them with a flat insulating layer having flexibility, the sash can be locked by being inserted between the window frame and the sash frame. Fixing fixtures are formed at both ends of the central cord part, so that it can be fixed and wired at an arbitrary height of the window frame. By interposing the switch, it is possible to cut off the energization in the event of a disconnection or short circuit, and the intermediate switch is turned off when it is not necessary, so safety is also taken into consideration.

  Hereinafter, the embodiment of the extension cord of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of the embodiment of the extension cord of the present invention, and FIG. FIG. 3 is a plan view of a tinned annealed copper fine wire used in the embodiment of the extension cord of the present invention.

  The present invention relates to an extension cord, and more specifically, a gap having unevenness between an aluminum sash window frame and a sash window frame that is electrically connected to a commercial power source installed in the building. Is an extension cord 1 having a plug P at one end and an outlet C at the other end, the extension cord 1 being a plug-side cord. Part 2, outlet side cord part 3 and central cord part 4 connecting between them, the plug side cord part 2 and the outlet side cord part 3 are covered with a two-core conductor with an insulating layer, and the central cord part 4 is composed of two bare conductors 4b each having flexibility, and two sets of conductors 4a arranged in parallel in a flat shape are covered in parallel and covered with a flexible insulating layer 4b. At the ends of the center cord 4 A fixing tool 5 is formed in each connecting portion of the plug side cord portion 2 and the outlet side cord portion 3 to be connected, and an intermediate switch 6 with a breaker is interposed in the plug side cord portion 2. It is characterized by.

  That is, the extension cord 1 of the present invention is a wiring cord having a length in which the plug P is attached to one end and the outlet C is attached to the other end. The plug P has a plug blade inserted into a commercial power source. The plug blade of the device used is inserted and electrically connected, and the length is not limited, but is, for example, an arbitrary one of about 3 to 10 m.

  The extension cord 1 includes a plug-side cord portion 2 to which the plug P is connected, an outlet-side cord portion 3 to which the outlet C is connected, and a central cord that connects between the plug-side cord portion 2 and the outlet-side cord portion 3. It consists of part 4.

  Next, the plug side cord portion 2 and the outlet side cord portion 3 are general cords, and a two-core conductor such as a copper wire having a round or rectangular cross section is formed by an insulating synthetic resin insulating layer. A coated cord is used.

  Next, the central cord portion 4 has a length that is at least the thickness of the window frame, and is inserted from the inside of the building to the outside along the unevenness between the window frame and the sash frame. As shown in FIG. 3, two sets of conductors 4a arranged in a flat shape by closely contacting three bare soft copper wires each having flexibility are paralleled to form a flat insulating layer 4b. It is coated with and has excellent bending resistance.

  Furthermore, the fixture 5 is formed at both ends of the central cord portion 4, that is, at the respective connecting portions of the plug side cord portion 2 and the outlet side cord portion 3. In the embodiment, the fixing cord 5 It is formed in a flat plate shape so as to bulge in the width direction of the flat shape, it may be stuck near the window frame, or it may be fixed by inserting a nail or screw by forming an insertion part It can be fixed at any high position on the window frame.

  Further, the intermediate switch 6 with a breaker includes a tumbler switch that turns on and off, and a breaker that is electrically connected to the tumbler switch. The tumbler switch includes an LED and is turned on or off. A display may be used and the plug side cord portion 2 is interposed.

  And the material of the twisted conductor 4a in the Example used for the center code | cord | chord part 4 of the extension cord 1 of this invention is the bare annealed copper wire of JISC3102, The structure is mm / piece | unit / stroke 3 × 17 / 0.18, the outer shape has flexibility of 0.85 × 2.55 mm, and the insulating layer 4b to be coated is made of flexible insulating PCV white and has a thickness of Is 0.875 × 1.525 mm, the outer shape of the cross section of the central cord portion 4 is finished to 2.60 mm × 11.20 mm ± 0.50 mm, and the length can be set by the thickness of the window frame.

  Furthermore, the electrical characteristics are that the insulation resistance is 5 MΩ / Km or more (20 ° C.), the conductor resistance is 16.55 Ω / Km or less (20 ° C.), the withstand voltage is 500 V / min. I implemented it and repeated tests with various patterns, but there was no problem with the use.

  The extension cord of the present invention consists of a plug-side cord portion, an outlet-side cord portion, and a central cord portion connecting between them, and the central cord portion is juxtaposed in a flat shape with three bare soft copper wires having flexibility. Since the two sets of conductors are parallel and covered with a flexible insulating layer in a flat shape, the sash can be locked by being inserted between the window frame and the sash frame. Even if it is laid underneath, etc., there is little swell, and furthermore, fixing parts are formed at the connection parts at both ends of the central cord part, so it can be fixed at any height position or a predetermined position of the window frame. In addition, the plug side cord part is equipped with an intermediate switch with a breaker, so that power can be cut off in the event of a disconnection or short circuit. What to keep the switch off , There is provided an extension cord with consideration safety.

FIG. 1 is a plan view of an embodiment of the extension cord of the present invention. FIG. 2 is an end view of an essential part of an embodiment of the extension cord of the present invention. FIG. 3 is a plan view of a bare annealed copper fine wire conductor used in the embodiment of the extension cord of the present invention.

Explanation of symbols

P Plug C Outlet 1 Extension cord 2 Plug side cord 3 Outlet side cord 4 Central cord 4a Conductor 4b Insulating layer 5 Fixing 6 Intermediate switch with breaker

Claims (1)

  An extension cord having a plug at one end and an outlet at the other end, the extension cord comprising a plug-side cord portion, an outlet-side cord portion, and a central cord portion connecting between the plug-side cord portion, the plug-side cord portion and the The outlet-side cord part is a two-core conductor covered with an insulating layer, and the central cord part is parallel to two sets of conductors arranged side by side in close contact with three bare soft copper wires each having flexibility. In addition, a flat type is covered with a flexible insulating layer, and a fixing tool is provided at each of the plug-side cord portion and the outlet-side cord portion connecting the both ends of the central cord portion, respectively. An extension cord formed by inserting an intermediate switch with a breaker in the plug side cord portion.

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