JPH10208616A - Plug assembly with current fuse and connector using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a mounting density and make a circuit board compact with a plug assembly in the plug assembly inserted in a power source plug socket and a connector that used this plug assembly. SOLUTION: Since a current fuse 6 inside the plug assembly 1 is included, the current fuse 6 is not required on a circuit board of a device with the plug assembly 1 and space saving can be carried out by making the board compact and improving the mounting density. In addition, workability can be improved by the elimination of soldering the current fuse 6 on the board and all circuits of the device can be protected from overcurrent because the current fuse 6 is arranged at the nearest position to the power source.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug assembly to be inserted into a power outlet and a connector using the plug assembly, and more particularly to a plug assembly suitable for use in a charging adapter.

[0002]

2. Description of the Related Art Conventionally, in electric equipment such as a charging adapter, a rotatable plug assembly having a pair of plugs as a connector to be inserted into a power outlet, and an electric terminal electrically connected to an output terminal of the plug assembly. Some are composed of conductive terminals of the device body. In general, in this type of electric equipment, a circuit is opened when an overcurrent flows for some reason in a printed circuit of the main body of the apparatus, and has a configuration capable of cutting off the overcurrent. As means for that, for example, A current fuse is used.

[0003]

However, when a current fuse is arranged on a printed circuit board as described above,
This has been an obstacle in reducing the size of the board and increasing the mounting density due to the miniaturization of the equipment. Further, since the current fuse needs to be soldered to the substrate, the workability at the time of assembling the device main body and replacing the fuse is deteriorated. Further, when an overcurrent flows in a circuit between the conductive terminal of the device body and the fuse, there is a problem that the protection by the current fuse cannot be obtained.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. By providing a current fuse in a plug assembly, the printed circuit board can be reduced in size and the mounting density can be improved. It is an object of the present invention to provide a plug assembly with a current fuse and a connector using the same, which can eliminate the need for soldering to the device and can protect all circuits in the device body with a current fuse.

[0005]

In order to achieve the above object, a plug assembly with a current fuse according to the first aspect of the present invention has two plugs inserted into a power outlet, and is electrically connected to the plugs. In a plug assembly having a connector terminal connected to a conductive terminal on a circuit board side, a current fuse that blows due to an overcurrent is interposed between at least one of the two plugs and the connector terminal. At the same time, the current fuse is inserted into a through hole formed in the plug, and the root of the plug, the current fuse and the root of the connector terminal are integrally formed of resin.

In the above configuration, the electric power supplied to the plug inserted into the power outlet passes through the current fuse, is supplied from the connector terminal to the conductive terminal on the circuit board side, and when an overcurrent flows in the circuit, The current fuse blows and opens the circuit. Since the current fuse is incorporated in the plug assembly, there is no need to dispose the current fuse on the circuit board, and the circuit board can be reduced in size.
Further, since it is not necessary to solder the current fuse to the substrate, it is possible to improve the workability when assembling the device main body and replacing the fuse. Further, since the current fuse is arranged at a position closest to the power supply, all circuits after the plug assembly can be protected from overcurrent.

In the plug assembly with a current fuse according to the present invention, one end of a fuse lead of the current fuse is soldered to a plug, and the other end of the fuse lead is electrically connected to a connector terminal. Things. In the above configuration, the mounting configuration of the current fuse to the plug is simplified.

According to a third aspect of the present invention, there is provided a connector using the plug assembly with a current fuse according to the first or second aspect of the present invention, and a circuit electrically connected to the connector terminal. A conductive terminal on the substrate side is provided, and a plug assembly with a current fuse is rotatable and detachable with respect to the conductive terminal. In the above configuration, the plug assembly is configured to be detachable from the conductive terminal, and the mounting and replacement of the plug assembly can be easily performed. Become. Further, the plug assembly is configured to be rotatable with respect to the conductive terminal. Usually, the plug is housed inside the device, and the plug can be pulled out only by rotating the plug assembly when necessary. Therefore, it is possible to prevent the plug from projecting when not in use, and to reduce the size of the device.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A plug assembly with a current fuse applied to a charging adapter for a portable telephone according to an embodiment of the present invention and a connector using the same will be described below with reference to the drawings. 1A is an external view of a plug assembly with a current fuse according to the present invention, FIG. 1B is a side view of the plug assembly, FIG. 2 is a cross-sectional view showing the internal configuration of the plug assembly, and FIG. 3) is a plan view of a plug provided with a current fuse, and FIG. 3B is a side sectional view of the plug. A plug assembly 1 with a current fuse is provided with two plugs (plugs) 2a and 2b inserted into a power outlet (not shown), and is electrically connected to the plugs 2a and 2b to be connected to conductive terminals on the printed circuit board side. It is composed of connector terminals 3a, 3b, and resin portions 4 covering the plugs 2a, 2b and the roots of the connector terminals 3a, 3b.

The connector terminals 3a, 3b are connected to plugs 2a,
The resin portion 4 protrudes from the resin portion 4 in a direction perpendicular to the length direction thereof, and a part thereof is covered by left and right connector arms 5 which are a part of the resin portion 4. A plurality of grooves 5a are formed around the connector arm 5, and the connector arm 5 is engaged with terminal springs 24 (see FIG. 4) of two terminals 21 on the circuit board 22 side of the charging adapter described later. Thus, the plug assembly 1 is configured to be rotatable with respect to the charging adapter main body. The details of the mounting configuration of the plug assembly 1 to the charging adapter will be described later.

A current fuse 6 is provided between one of the two plugs 2a and 2b and the connector terminal 3a.
Is interposed. The current fuse 6 includes a fuse portion 7 that is a resistor that is blown by an overcurrent, and a fuse case 8 and a fuse lead 9 for protecting the fuse portion 7, and the fuse case 8 is formed at the root of the plug 2a. It is inserted into a through hole 11 (see FIG. 3) provided in the vicinity. One end 9a of the fuse lead 9 is soldered 12 to the plug 2a, and the other end 9b is electrically connected to the metal tube 13 forming the connector terminal 3a.
The plug 2b without the current fuse 6 and the connector terminal 3b are integrated. The plug assembly 1 is formed by placing a plug 2a, a plug 2b having a current fuse 6 and a metal cylinder 13 in a mold, press-fitting a plastic resin into the mold, and integrally molding the same. Since the current fuse 6 is incorporated in the plug assembly 1 in this manner, the size of the printed circuit board of an apparatus including the plug assembly 1 can be reduced.

FIG. 4 is a perspective view showing the configuration of a connector including a plug assembly 1 and a connection portion on the circuit board 22 side of a charging adapter (apparatus) to which the plug assembly 1 is attached. FIG. 5 is an external view showing an outer shape of a charging adapter provided with a connector having a plug assembly 1,
FIG. 6 is a block diagram showing a charging adapter provided with a connector and a device such as a mobile phone charged by the charging adapter. As shown in FIG. 4, the connector 20 includes a plug assembly 1 and two conductive terminals 21 on the circuit board 22 side electrically connected to the connector terminals 3a and 3b. These conductive terminals 21 are bent in a U-shape and project from the printed circuit board 22.
And a terminal spring 24. Terminal spring 2
4 are arranged inside the terminal plate 23, respectively.
A wavy web 24a is provided at the tip.

In order to attach the plug assembly 1 to the conductive terminal 21, the left and right terminal plates 23 and the connector terminals 3a, 3
The connector terminals 3a and 3b and the connector arms 5 are inserted between the terminal plate 23 and the terminal springs 24 so that the terminal b and the terminal spring 24 are in contact with each other and the terminal springs 24 and the connector arms 5 are engaged with each other. You. Conductive terminal 21 is screw 25
By this, it is fixed to the cabinet 26 of the charging adapter together with the circuit board 22. The charging adapter 30 includes a circuit portion (not shown) mounted on the connector 20 and the circuit board 22, and further has a charging output terminal 35 (FIG. 6) to which a device 40 such as a mobile phone is connected.

According to the above configuration, the plug assembly 1 can be detachably attached to the conductive terminal 21, so that the plug assembly 1 can be easily attached, and the workability at the time of assembling the main body of the apparatus or replacing the fuse can be improved. Can be. Since the wavy web 24a of the terminal spring 24 is engaged with the groove 5a of the connector arm 5, the plug assembly 1 does not swing with respect to the conductive terminal 21, and the posture is maintained at a predetermined position.

Since the plug assembly 1 is rotatable with respect to the conductive terminal 21, if the plug assembly 1 is used for a charging adapter 30 of a portable telephone, the plugs 2a and 2b are connected to the charging adapter except during charging. 30 back 31
Since it can be stored in the recess 32 provided in FIG. 5, the plugs 2a and 2b can be prevented from projecting when not in use, and the storage size of the charging adapter 30 can be reduced. In addition, plug 2
Since the current fuse 6 is arranged at a position closest to the terminals a and 2b, the entire circuit of the device 40 such as a mobile phone charged by the charging adapter 30 can be protected from overcurrent.

The present invention is not limited to the above embodiment, but can be variously modified. For example, in the above-described embodiment, the plug assembly 1 is shown to be rotated. However, the present invention can be similarly applied to a configuration in which the plug assembly 1 does not have a rotating configuration and is fixed and exchangeable.

[0017]

As described above, according to the plug assembly with a current fuse according to the first aspect of the present invention, a current fuse is incorporated inside the plug assembly, so that the current is mounted on a circuit board of an apparatus provided with the plug assembly. It is not necessary to dispose a fuse, so that the circuit board can be reduced in size, the mounting density can be improved, and the space can be saved. Also,
Since it is not necessary to solder the current fuse on the board,
Workability can be improved. Further, since the current fuse is arranged at a position closest to the power supply, all circuits of the device can be protected from overcurrent.

According to the plug assembly with a current fuse according to the present invention, one end of the fuse lead of the current fuse is soldered to the plug, and the other end of the fuse lead is electrically connected to the connector terminal. The configuration for mounting the current fuse to the plug has been simplified,
Good workability.

According to the connector using the plug assembly with a current fuse according to the third aspect of the present invention,
Since the plug assembly with the current fuse is rotatable and detachable with respect to the conductive terminal, replacement and installation of the plug assembly becomes easy, and workability in mounting and replacing the current fuse can be further improved.
In addition, the plug is usually housed inside the device in which the connector is mounted, and the plug can be pulled out only when necessary by rotating the plug assembly, so that the plug can be prevented from projecting when not in use. Can be reduced in size.

[Brief description of the drawings]

FIG. 1A is an external view of a plug assembly with a current fuse according to an embodiment of the present invention, and FIG. 1B is a side view of the plug assembly.

FIG. 2 is a sectional view showing an internal configuration of the plug assembly.

3A is a plan view of a plug provided with a current fuse, and FIG. 3B is a side sectional view of the plug.

FIG. 4 is a perspective view showing a configuration of a connector including the plug assembly and a connection portion of a device to which the plug assembly is attached.

FIG. 5 is an external view of a charging adapter provided with a connector having the plug assembly.

FIG. 6 is a block configuration diagram of the plug assembly, the charging adapter, and devices connected thereto.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plug assembly with current fuse 2a, 2b Plug 3a, 3b Connector terminal 6 Current fuse 9, 9a, 9b Fuse lead 11 Through hole 20 Connector 21 Conductive terminal 22 Circuit board 30 Charging adapter (device)

Claims (3)

[Claims] 1. A plug assembly comprising: two plugs inserted into a power outlet; and a connector terminal electrically connected to the plug and connected to a conductive terminal on a circuit board side. A current fuse that blows due to an overcurrent is interposed between at least one plug and the connector terminal, and the current fuse is inserted into a through hole formed in the plug, and a root portion of the plug, the current fuse And a plug assembly with a current fuse, wherein a root portion of the connector terminal is integrally formed of resin. 2. The current fuse according to claim 1, wherein one end of a fuse lead of the current fuse is soldered to the plug, and the other end of the fuse lead is electrically connected to a connector terminal. Plug assembly. 3. A plug assembly with a current fuse according to claim 1 or 2, and a conductive terminal on a circuit board side electrically connected to the connector terminal, wherein the plug assembly with a current fuse is connected to the conductive terminal. A connector using a plug assembly with a current fuse, wherein the connector is configured to be rotatable and detachable with respect to a terminal.