KR100534054B1 - Telephone connector with safety circuit - Google Patents

Abstract

The present invention provides a telephone connection port for connecting an external telephone line with an indoor device, comprising: a plurality of first terminals connected to the external telephone line and having active lines and neutral lines; A plurality of second terminals connected through an active line and a neutral line extending from the first terminal and connected to the indoor device; Surge blocking means for blocking a surge voltage flowing through the first terminal by being connected in parallel between an active line and a neutral line connected between the first terminal and the second terminal; Noise blocking means for blocking noise flowing through the surge blocking means by being connected in series and in parallel between an active line and a neutral wire connected between the first terminal and the second terminal; And backflow prevention means connected in series with an active line connected between the first terminal and the second terminal to block the noise flowing back to the noise blocking means through the second terminal. It improves communication quality by removing surge voltage and noise, and provides a telephone connection with a built-in protection circuit to prevent damage to communication equipment.

Description

Telephone outlet with built-in protection circuit {TELEPHONE CONNECTOR WITH SAFETY CIRCUIT}

The present invention relates to a telephone connection, in particular, by adding a means for preventing surge voltage and noise between the telephone connection terminal and the telephone connection terminal and the equipment connection terminal embedded in the indoor wall through the telephone line during the call The present invention relates to a telephone access port having a built-in protection circuit that can improve the call quality by preventing surge voltage and noise caused by lightning strikes and prevent damage to the device.

In recent years, telephone lines have expanded the use of not only telephone calls but also Internet communication networks, and the use of LANs connecting multiple computers to communication networks has become more popular, so that telephones, faxes, computer modems, etc. can be integrated using a single line. Operate.

It is used to connect communication devices such as telephones, faxes, and computer modems through a single telephone connection or a multi-telephone connection.However, instantaneous surge voltages and noises caused by transients or lightning strikes can be If it is introduced into a fax, a computer, etc. could not be removed, there was a problem that the communication quality of the phone, fax, computer modem, etc. is degraded or the device is damaged.

Accordingly, an object of the present invention is to add a means for preventing surge, noise, and backflow between a telephone connection terminal and a multi-telephone telephone connection terminal and a device connection terminal embedded in a wall of a room, and lightning flows in through a communication line during communication. To improve the communication quality by eliminating the surge voltage and noise caused by the lamp and the like, and to provide a telephone connection with a built-in protection circuit to prevent damage to the communication equipment.

Technical means of the present invention for achieving the above object, in the telephone connection port 10 for connecting the external telephone line and the indoor device: a plurality of connected to the external telephone line and having an active line (A) and a neutral line (N) First terminals (TA1, TN1); A plurality of second terminals TA2 and TN2 connected through an active line A and a neutral line N extending from the first terminals TA1 and TN1 and connected to an indoor device; Surge voltage flowing through the first terminals TA1 and TN1 by being connected in parallel between the active line A and the neutral line N connected between the first terminals TA1 and TN1 and the second terminals TA2 and TN2. Surge blocking means for blocking the (11); Noise introduced through the surge interruption means 11 by being connected in series and parallel between the active line A and the neutral line N connected between the first terminals TA1 and TN1 and the second terminals TA2 and TN2. Noise blocking means for blocking the 13; And connected in series to an active line A connected between the first terminals TA1 and TN1 and the second terminals TA2 and TN2 to flow back to the noise blocking means 13 through the second terminals TA2 and TN2. And backflow preventing means for blocking noise.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Fig. 1 is a block diagram showing a protection circuit of a telephone connector according to the present invention, wherein the first terminals TA1 and TN1, the second terminals TA2 and TN2, the surge blocking means 11, and the noise blocking means 13 are shown. It consists of a backflow prevention means (15).

The telephone connection port 10 to which the present invention is applied is mainly installed in a wall of an indoor, and consists of terminals TA2 and TN2 for interconnecting an indoor telephone 1 or a communication modem to an external telephone line connected to a telephone station.

That is, the first terminals (TA1, TN1) is composed of a plurality of terminals connected to the external telephone line, but connected to the active line (A) and the neutral line (N), the second terminals (TA2, TN2) are exposed to the room And a plurality of terminals to which an active line A and a neutral line N, which extend from the first terminals TA1 and TN1, are connected, and a communication device 1 including a telephone or a communication modem in the room is connected.

The surge interrupting means 11 is connected in parallel between the active line A and the neutral line N connected between the first terminals TA1 and TN1 and the second terminals TA2 and TN2 so that the first terminals TA1 and TN1 are connected in parallel. It is configured to block the surge voltage flowing through the, and the noise blocking means 13 is the active line (A) and the neutral line (N) connected between the first terminal (TA1, TN1) and the second terminal (TA2, TN2) Is connected in series and in parallel to each other to block the noise flowing through the surge blocking means 11, and the backflow preventing means 15 includes the first terminals TA1 and TN1 and the second terminals TA2 and TN2. Is connected in series with the active line A connected between the circuits and blocks the noise flowing back to the noise blocking means 13 through the second terminals TA2 and TN2.

2 shows a protection circuit of a telephone connection port according to an embodiment of the present invention, and shows a surge blocking means 11, a noise blocking means 13 and a backflow preventing means 15. As shown in FIG.

The surge interrupting means 11 connects the first varistor VA1 and the second varistor VA2 in series between the active line A and the neutral line N, and the first and second varistors VA1, The common contact point of VA2) is connected to the ground voltage, and is connected between the active line A and the neutral line N, and is connected to the third varistor VA3 connected in parallel with the first and second varistors VA1 and VA2. consist of.

The noise blocking means 13 includes a first inductor L1 connected in series between the first terminals TA1 and TN1 and an active line A of the second terminals TA2 and TN2, and the first terminal. A second inductor L2 connected in series between the TA1 and TN1 and the neutral line N of the second terminals TA2 and TN2, and an output terminal of the first inductor L1 and an output terminal of the second inductor L2. It consists of an LC filter composed of capacitors C1 connected therebetween.

The non-return means 15 includes a forward diode D1 connected in series with an active line A between the output terminal of the first inductor L1 and the second terminal TA2.

The surge interrupting means 11 uses a varistor to discharge a surge current of up to about 10 mA, and a larger surge current does not generally occur in a communication line or the like, because of the cross-sectional area of the communication line. This is because they are relatively small and do not have the capacity to charge transient transients.

That is, the information received through the external telephone line connected to the first terminals (TA1, TN1) is a telephone or communication device (1) connected to the second terminals (TA2, TN2) through the active line (A) and the neutral line (N) Information transmitted from a telephone or communication device 1 connected to the second terminals TA2 and TN2 is connected to the first terminals TA1 and TN1 through an active line A and a neutral line N. It is transmitted through an external telephone line.

At this time, when an abnormal voltage such as surge or noise flows through the active line A and the neutral line N of the first terminals TA1 and TN1 through an external telephone line, the first and second varistors VA1 and VA2 The current flow is increased, and a surge voltage or a current of a predetermined voltage or more is absorbed and flowed to the ground, and a surge that is not absorbed by the first and second varistors VA1 and VA2 is absorbed by the third varistor VA3. do.

In addition, high frequency noise of a predetermined frequency among the signals passing through the first to third varistors VA1 to VA3 through the external telephone line is removed through the capacitor C1 of the low pass filter that is the noise blocking means 13. By being applied to the second terminals TA2 and TN2, the telephone or communication device connected to the second terminals TA2 and TN2 has no influence due to surge and noise.

In addition, as the non-return diode D1 is installed on the active line A side of the second terminals TA2 and TN2, noise generated from a telephone or a communication device is transmitted through the second terminals TA2 and TN2. It is possible to prevent the backflow to (13) to improve the quality of the call and communication line.

While specific embodiments of the present invention have been described and illustrated above, it will be apparent that the present invention may be embodied in various modifications by those skilled in the art. Such modified embodiments should not be understood individually from the technical spirit or the prospect of the present invention, but should fall within the claims appended to the present invention.

Therefore, in the present invention, by adding a means for preventing surge, noise, and backflow between the telephone connection terminal and the telephone connection terminal and the equipment connection terminal embedded in the indoor wall, such as lightning strike through the communication line during communication. By eliminating surge voltage and noise, it improves call quality and also prevents damage of equipment due to abnormal voltage.

1 is a block diagram showing a protection circuit of a telephone connector according to the present invention,

2 is a diagram illustrating a protection circuit of a telephone connector according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10: telephone connection 11: surge blocking means

13: Noise blocking means 15: Backflow prevention means

TA1, TN1: first terminal TA2, TN2: second terminal

A: active line N: neutral line

VA1 to VA3: Varistor

Claims (4)

An external telephone line to which indoor equipment is connected, and a plurality of first terminals connected to the external telephone line and having active lines and neutral lines; A plurality of second terminals connected through an active line and a neutral line extending from the first terminal and connected to an indoor device; In the telephone connection port provided with; a surge blocking means for blocking the surge voltage flowing through the first terminal is connected in parallel between the active wire and the neutral wire connected between the first terminal and the second terminal, A first inductor connected in series between the active line of the first terminal and the second terminal, a second inductor connected in series between the neutral line of the first terminal and the second terminal, and an output terminal and a second output terminal of the first inductor Noise blocking means which comprises an LC filter composed of capacitors connected between the output terminals of the inductor, and blocks noise introduced through the surge blocking means; And And a backflow prevention means formed of a forward diode connected in series with the output line of the first inductor and the active line of the second terminal, and blocking the noise flowing back to the noise blocking means through the second terminal on the active line. Telephone port with built-in protection circuit. delete delete delete