JPH0236222Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a car plug that can be inserted into the socket of a car's cigarette lighter to provide power for devices such as car stereos, pots, and portable vacuum cleaners. It's about adapters.

[Prior art and its problems]

Conventionally, many car plugs have been commercially available, and they are used by inserting them into the cigarette lighter socket of each car to obtain power and connecting them to each device with a cord, but each car manufacturer has different socket types. The size of the insertion hole differs slightly; in particular, European cars use sockets with an insertion hole about 2 mm larger in diameter, while the domestically produced car plugs currently manufactured have a smaller outer diameter. , after insertion, it loosens and falls out, rotates, or shoots in the socket, making it impossible to maintain a stable electrical connection. The fact is that it is inserted and fixed, which is not only dangerous, but also has the problem that if it were to fall out while driving, the driver would be distracted by it, which could lead to a catastrophe.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention is to fit a special adapter into a car plug that has been commercially available in Japan to fill the gap between the plug and the insertion hole of the large diameter socket.

[Purpose of invention]

The object of the present invention is to provide an adapter that maintains a stable insertion state of a car plug inserted into a socket for a large-diameter cigarette lighter, especially in European cars, and provides a stable electrical connection.

[Structure of the idea]

The structure of the present invention is to form arms at 3 to 8 locations with gaps between each of the metal cylinder girths with a flange at the base end, and extend a locking piece to the tip of each arm. A U-shaped cut groove is formed on each arm, and the inner piece is bent to form a ground terminal contact piece whose tip narrows toward the inner circumference. This configuration has a bent portion that bulges out.

〔Example〕

The present invention will be described below based on drawings of embodiments.

FIG. 1 is an external perspective view of the embodiment in which arm portions are formed at eight locations, and FIG. 2 is a sectional view of the main parts thereof.

The present invention is a dedicated adapter 1 for a car plug that is inserted into the socket of a car's cigarette lighter to obtain power for devices such as a car stereo, a pot, and a portable vacuum cleaner. Arms 5 are formed at equal intervals at 3 to 8 locations with a gap 4 between them, leaving a slight width of the metal cylinder girth 3 provided, and the width is narrowed to the tip of each arm 5. A locking piece 6 is extended, and a U-shaped cut groove 7 is formed on the center side of each arm 5 with the tip side separated, and the inner piece is bent so that the tip narrows toward the inner circumference side. A ground terminal contact piece 8 is formed, and each of the locking pieces 6 is formed with a bent portion 9 that bulges toward the outer periphery.

That is, the car plug adapter 1 of the present invention has the following features:
In particular, the adapter 1 can be inserted into and removed from the large diameter socket of a cigarette lighter in a European car while the car plug is still fitted.The flange part 2 provided on the outer circumferential side of the base end of the metal cylinder is attached to the end of the socket's insertion hole when inserted. In the illustrated embodiment, in which gaps 4 are provided between the metal cylinder body circumference 3 and the distal end, arms 5 are formed at eight locations at equal intervals. Since each of the arm parts 5 has a gap part 4 between them, each arm part 5 extends from the waist circumference 3 with a slight width left in the state where each arm part 5 is independent, so that it has an appropriate elastic force due to the characteristics of the metal material. In addition, a U-shaped cut groove 7 is formed with a length in a state where the distal end side is separated from the center side of each arm portion 5, that is, the proximal end side is connected, and the U-shaped cut groove 7 is Once the connection side of the strip formed inside 7 is bent to the outer circumference side, the tip side is further bent to the inner circumference side so that the tip narrows inward from the waist circumference 3 and connects to the ground. A terminal contact piece 8 is formed,
The U-shaped cut groove 7 is formed so that a ground-side elastic metal terminal protruding from the body circumference of the car plug is inserted to increase the contact area, and at the same time narrows toward the inner circumference. The earth terminal contact piece 8 also presses the earth side elastic metal terminal with elastic pressure, and a narrow locking piece 6 is provided extending to the tip of each of the arm portions 5. Reference numeral 6 has bent portions 9 that bulge toward the outer circumference and press the inner wall of the socket toward the outer circumference with elastic pressure.

In addition, in the present invention, if the number of arm portions 5 is less than 3, the elastic pressing contact with the ground side elastic metal terminal protruding into the body circumference of the car plug is insufficient and the arm portion 5 easily comes off.
If the elasticity of the arm part 5 is too soft and the pressure is insufficient above the above points, there is a risk that the arm part 5 will come off immediately during driving when vibrations occur, especially in places 3 to 8. The arm portions 5 are formed by disposing gap portions 4, which are slits, at intervals.

[Effect of idea]

This invention involves inserting the adapter into a large-diameter cigarette socket with the car plug fitted, but once inserted, the car plug may become loose, fall out, or the electrical connection may become defective. There is no risk whatsoever, and most car plugs commercially available in Japan can be used as they are, and a stable electrical connection can be obtained, making it possible to provide a highly reliable car plug.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of the embodiment in which arm portions are formed at eight locations. FIG. 2 is a sectional view of the main part. 1...adapter, 2...flange section, 3...
Waist circumference, 4... Gap portion, 5... Arm portion, 6... Locking piece, 7... U-shaped cut groove, 8... Earth terminal contact piece, 9... Bent portion.

Claims (1)

[Scope of Claim for Utility Model Registration] An adapter for a car plug that is inserted into the socket of an automobile's cigarette lighter, comprising a metal cylinder with a flange at the base end, leaving a slight width in the girth and a gap between each cylinder. Arms are formed at equal intervals at 3 to 8 locations, and a narrow locking piece is extended to the tip of each arm, and the tip side is separated from the center side of each arm. A ground terminal contact piece is formed by forming a U-shaped cut groove and bending the inner piece so that the tip narrows toward the inner circumference, and each of the locking pieces has a bent portion that bulges toward the outer circumference. An adapter for a car plug, which is characterized by forming the following.