JPH11135199A - Power source plug for electronic equipment protection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect electronic equipment from over-voltage. SOLUTION: A case 4 contains a power line 1, a telephone line 2 and a protector 3. The power line 1 serves as a relay line for connecting electronic equipment to an external power source, and the telephone line 2 serves as a junction line for connecting the electronic equipment to a telephone line. The protector 3 protects the electronic equipment from an over-voltage which is inputted from the external power source or an external telephone line and is installed at one of the surfaces of a substrate 19. The substrate 19 divides the inside of a case 4 into two chambers for separating the power line 1 and the telephone line 2 provided in the chambers respectively and separates a component of the protector 3 from the power source line 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power plug for protecting an electronic device using a telephone line such as a personal computer and a facsimile.

[0002]

2. Description of the Related Art Electronic devices connected to telephone lines such as telephones, personal computers, facsimiles, etc., protect the electronic devices from abnormal voltages such as noise and surges. Is provided. The protector has a surge absorbing element connected between power supply wiring and telephone wiring, and a surge arrester and a varistor are used as the surge absorbing element.

Conventionally, the protector has been arranged in a telephone, but recently, it is often incorporated in a plug or an adapter connected to a power outlet. JP-A-6-1247
No. 50 has a plug connected to a commercial power outlet on the front of a plug case as a power supply plug for protecting electronic devices that can be used easily in ordinary households, and the other three surfaces of the plug case have electronic devices. A power plug has been proposed which has a total of three receptacles (sockets) for a power cable plug, a filter or a surge absorbing element built in a plug case, and is connected in parallel with the plug and receptacle.

In addition, Japanese Utility Model Registration No. 3037074 proposes a surge absorbing unit in which a telephone connector is arranged in a power socket to absorb overvoltage to a telephone line.

[0005]

The above registration No. 30370
The surge absorbing unit described in Utility Model No. 74 has a power supply socket in which a male terminal 37 for connecting a power supply line protrudes to the front and a female terminal 38 integral with the male terminal 37 is arranged on the back as shown in FIG. Telephone line relay connectors 32, 32 are arranged in a socket body 31, a surge absorbing element 36 is provided between telephone lines, and a varistor 33 is provided between power supply lines.
And a varistor 34 and a surge absorbing element 35 are interposed between the power supply line and the telephone line.

When using this surge absorbing unit,
By arranging the surge absorbing element between the power supply line 6 in the power supply socket and the telephone line, an overvoltage applied to the telephone line can be released to the power supply line to protect the electronic device.

An object of the present invention is to embody the above-mentioned surge absorbing unit, and to prevent interference of a power supply line in a plug with a telephone line to further protect electronic equipment safely. It is to provide a power plug.

[0008]

In order to achieve the above object, a power plug for protecting electronic equipment according to the present invention comprises a power supply line, a telephone line, and a power plug for protecting electronic equipment in a case. Wherein the power line is a trunk connecting the electronic device to an external power source, the telephone line is a trunk connecting the electronic device to the telephone line, and the protector is input from the external power source or the telephone line. The electronic equipment is protected from overvoltage, and is mounted on a board, and the board separates a power supply line and a telephone line in a case.

Further, the protector includes a surge absorbing element and other electric parts, and the electric parts are mounted on one surface of the substrate,
A telephone line is connected to the electronic component mounting surface.

[0010] Further, the substrate partitions the inside of the case into two chambers, and the power supply line is installed in a first chamber in the case.
The telephone line is installed in the second room.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a power plug for protecting electronic equipment according to the present invention will be described below with reference to the drawings. FIG.
In the power plug for protecting electronic equipment according to the present invention, a power supply line 1, a telephone line 2, and a protector 3 are provided in a case 4. The power line is a trunk line of a power source, and the telephone line is a trunk line of a telephone. The case 4 is a combination of a shell 5 and a plate 6. The shell 5 is a rectangular hollow box having an opening on one side, and the plate 6 is a lid for closing the opening of the shell 5. Shell 5
The plate 6 and the plate 6 are detachably connected with a connecting piece. The power supply line 1 is a bracket integrally formed with a plug pin 7 at one end and a socket 8 at the other end. The plug pin 7 serves as an input terminal of a power supply and the socket serves as an output terminal.
The pair of power supply lines 1 are built in parallel to the case 4 by inserting and holding the two plug pins 7 in slits opened parallel to one surface of the plate 6. The socket 8 of the power supply line 1 is arranged to face a receptacle 9 opened on the back of the shell 5. On the other hand, telephone line 2
This wiring connects the pair of connectors 10. The pair of connectors 10 are input / output terminals of a telephone line, are detachably held at the lower part of the plate 6, and are arranged facing a notch 11 formed on the lower surface of the shell 5.

The protector 3 protects electronic equipment from overvoltage when an overvoltage is input from an external power supply circuit or a telephone line. FIG. 3 shows wiring of the protector 3. The protector 3 includes a surge absorbing element and other electronic components. In this embodiment, a varistor 12 is connected between a pair of power supply lines 1 and a lightning arrester 1 is connected between a pair of telephone lines 2.
3 and a lightning arrester 14 and a varistor 15 are connected in series between the power supply line 1 and the telephone line 2.

A resistor 1 is provided between a pair of power supply lines 1.
6. The LED 18 is connected via the diode 17. The LED 18 is an indicator light when the power is turned on.

In the present invention, the components of the protector 3 including the varistors 12 and 15 and the lightning arresters 13 and 14 and the LED
The electric components such as 18 are all mounted on one surface of the substrate 19, and the substrate 19 is mounted in the case 4. In FIGS. 1 and 2, the substrate 19 is laid across the plate 6
The case 4 is held at a fixed position, and the inside of the case 4 is divided into an upper first chamber 20 and a lower second chamber 21.

As a result, the power supply line 1 is connected to the first chamber 2
0, the telephone line 2 is installed in the second room 21, and the power supply line 1 and the telephone line 2 are isolated from each other by the substrate 19. The electronic component mounting surface of the substrate faces the second chamber, and a part of the wiring of the telephone line 2 is attached to the mounting surface of the surge absorbing element and other components mounted on the substrate.

In the present invention, the plug pin 7 protruding from one side of the case 4 is inserted into a plug receptacle 22 of a commercial power outlet, and the receptacle 9 on the other side of the case 4 is connected to a power supply of an electronic device such as a personal computer or a facsimile. The commercial power is supplied to the electronic device by inserting the plug pin 23 attached to the cable.

On the other hand, the modular jacks 24 of the telephone line cable and the cable of the electronic equipment are connected to the connector 10 respectively.
And connect the electronic device to the telephone line. As a result, when an overvoltage applied from an external power supply is applied,
Any overvoltage input from the external telephone line is absorbed by the ground side of the power supply line, the power supply line 1 and the telephone line 2 are isolated on the substrate 19, and the protection device 3
All the electronic components on the substrate 19 including the above are isolated from the power supply line 1. In FIG. 3, reference numeral 25 denotes a fuse. The fuse 25 is provided in the power supply line 1 and is effective when an unexpected surge such as a direct lightning strike is received.

[0018]

As described above, according to the present invention, the power supply relay line and the telephone relay line are built in the plug case, the relay lines are separated by the board, and the protector and other electrical equipment mounted on the board are separated. Since the components are isolated from the power supply relay line, there is an effect that an electronic device can be effectively protected by preventing a short circuit accident between the relay lines or an accident such as breakage of components due to generation of a spark.

[Brief description of the drawings]

FIG. 1 is an exploded view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of one embodiment of the present invention.

FIG. 3 is a wiring diagram of a protector.

FIG. 4 is a diagram showing a prior example of a surge absorbing unit.

[Explanation of symbols]

 Reference Signs List 1 power supply line 2 telephone line 3 protector 4 case 5 shell 6 plate 7 plug pin 8 socket 9 receptacle 10 connector 11 notch 12 varistor 13 lightning arrester 14 lightning arrester 15 varistor 16 resistor 17 diode 18 LED 19 substrate 20 first room 21 first 2 chamber 22 Plug socket 23 Plug pin 24 Modular jack 25 Fuse

Claims (3)

[Claims] 1. A power plug for protecting an electronic device including a power line, a telephone line, and a protector in a case, wherein the power line is a relay line for connecting the electronic device to an external power supply. Is a relay line that connects the electronic device to the telephone line.The protector protects the electronic device from overvoltage input from an external power supply or the telephone line, and is mounted on a board.
A power plug for protecting an electronic device, wherein the board separates a power line and a telephone line in a case. 2. The protector includes a surge absorbing element and other electric parts, wherein the electric parts are mounted on one surface of a substrate, and a telephone line is connected to a mounting surface of the electronic parts. Item 2. The power plug for electronic device protection according to item 1. 3. The substrate is for dividing the inside of the case into two rooms, the power supply line is installed in the first room in the case, and the telephone line is installed in the second room. The power plug for protecting electronic equipment according to claim 1 or 2.