JP3102201U - Communication line confirmation device - Google Patents

Abstract

A communication line confirmation device capable of confirming a communication state without affecting a communication line, and reducing the size of the device without using a battery.
In a communication line confirmation device, an impedance switching circuit for switching between high and low impedances, a power acquisition circuit for acquiring power from a communication line, an amplification circuit for amplifying a signal from the communication line, and an output from an amplification circuit. An earphone 131 that outputs a signal, a microphone 132 to which a user's voice is input, and an amplification circuit 35 that amplifies a signal from the microphone 132 are provided. When the communication line is confirmed, the impedance switching circuit 31 is set to high impedance, and a signal is obtained without affecting the communication line. Since the communication line checking device 1 uses only the power obtained by the power obtaining circuit 32 during operation, it is not necessary to provide a battery, and the size is reduced.
[Selection] Figure 2

Description

  The present invention relates to a communication line confirmation device used when confirming a use state and a connection state of a communication line.

  Conventionally, in order to check the connection state between the telephone office and the home telephone line, the connection state between the outdoor and indoor telephone lines, or the indoor wiring state, the state of the signal by connecting to the telephone line is checked. A communication line confirmation device called "breast" for confirming and making a telephone call using an analog signal is used.

For example, in Patent Literature 1, a signal from a telephone line is input to an amplifier via a resistor having a resistance value sufficiently higher than that of a terminal, amplified, and the amplified signal is output from a crystal earphone. There is disclosed a device which can listen to voice without affecting a telephone line even when the line is in use. Further, Patent Documents 2 and 3 disclose a handset of a type that can be hung on the head of an operator.
JP-A-10-164207 Japanese Utility Model Publication No. 3-36247 Japanese Utility Model Publication No. 61-97256

  In the device described in Patent Document 3, electric power used for driving an electronic circuit is obtained from a telephone line. This device basically has the same structure as a normal telephone, and does not have a circuit structure that considers the effect on the telephone line when connected to a telephone line. It will have an effect. On the other hand, in Patent Document 1, a device is devised by using a resistor so as not to affect the telephone line even when connected to the telephone line in use.

  By the way, a device used for confirming a telephone line has conventionally been developed as a dedicated device, and various functions have been added in addition to confirming the telephone line. As a result, as exemplified in Patent Literature 1 and Patent Literature 2, a battery is usually provided to obtain power suitable for a dedicated circuit in the device, and the device itself has to be somewhat large. On the other hand, since the communication line confirmation device is frequently used by workers in various situations, it is preferable that the communication line confirmation device be of a size that cannot be easily stored in a clothes pocket or that will not operate due to battery exhaustion. I can't say.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its main object to provide a communication line confirmation device which does not require a battery and can be reduced in size.

  The invention according to claim 1 is a communication line confirmation device used when confirming a communication line, wherein the line connection unit connected to the communication line and the line while maintaining a signal transmitted through the communication line. A signal acquisition circuit that acquires the signal via a connection unit, a power acquisition circuit that acquires power from the communication line via the line connection unit, and an amplification circuit that amplifies the signal acquired by the signal acquisition circuit And an earphone connection unit for connecting an external earphone and the amplifying circuit, and only the power obtained by the power obtaining circuit at the time of the operation of confirming the communication line is used.

  The invention according to claim 2 is the communication line confirmation device according to claim 1, further comprising a magnetic earphone as the external earphone.

  The invention according to claim 3 is the communication line checking device according to claim 1 or 2, wherein the microphone is connected to the external microphone via the microphone connection unit to which an external microphone is connected, It further comprises another amplification circuit for amplifying a signal from the external microphone, and a changeover switch for changing a level of impedance of the signal acquisition circuit, wherein the signal from the external microphone is amplified by the another amplification circuit. In this case, the impedance of the signal acquisition circuit is set low by the changeover switch, and a signal from the another amplification circuit is transmitted to the communication line via the signal acquisition circuit and the line connection unit.

  The invention according to claim 4 is the communication line confirmation device according to claim 3, further comprising a condenser microphone as the external microphone.

  The invention according to claim 5 is the communication line confirmation device according to claim 3 or 4, wherein the earphone connection portion and the microphone connection portion are provided as an earphone microphone jack having a hole diameter of 2.5 mm.

  According to a sixth aspect of the present invention, there is provided the communication line checking device according to any one of the first to fifth aspects, further comprising a mounting means for mounting on a body or clothes of the user.

  The invention according to claim 7 is the communication line confirmation device according to any one of claims 1 to 6, further comprising an outer case, wherein a water repellent is applied to a circuit board in the outer case. .

  The invention according to claim 8 is the communication line confirmation device according to any one of claims 1 to 7, wherein the communication line includes an ADSL line.

  According to the present invention, since a battery is not used for amplifying a signal to the external earphone, it is not necessary to provide a battery in the communication line confirmation device, and the size can be reduced.

  According to the invention of claim 2, even a magnetic earphone can be used. According to the invention of claim 3, a signal from an external microphone can be amplified without using a battery. In the invention, even a condenser microphone can be used. According to the invention of claim 5, a commercially available earphone microphone for a mobile phone can be used, and the price of the communication line confirmation device can be reduced.

  According to the invention of claim 6, the device can be more easily carried in accordance with the miniaturization of the device, and the invention of claim 7 can be used in various use environments.

  FIG. 1 is a diagram showing the appearance of a communication line confirmation device 1 according to the present invention. The communication line confirmation device 1 may be, for example, a communication state or a connection state of a telephone line (other types of communication lines dedicated to data communication, hereinafter referred to as “communication lines”) when a telephone is installed. The main unit 10 is covered with an outer case 11, two line connection terminals 12 connected to a communication line, an earphone microphone 13 having an earphone 131 and a microphone 132, and a line. An attachment ring 14 is provided for attachment to clothes of a user who is a construction worker.

  The two line connection terminals 12 are clips each having a communication line at the tip. The earphone microphone 13 is a commercially available earphone microphone used for a mobile phone, and the earphone microphone carried with the mobile phone may be used as it is. The earphone microphone 13 is, specifically, the earphone 131 is a magnetic earphone, the microphone 132 is a condenser microphone, and the connection with the main body 10 is a stereo pin plug having a diameter of 2.5 mm as a common plug for the earphone and the microphone. This is performed by the plug 133 used.

  The outer case 11 is a plastic case, has a width of 30 mm, a height of 50 mm, and a depth of 20 mm. The main body 10 is very small and lightweight so that it can be easily stored in a pocket of clothes. The attachment ring 14 is attached with a string hanging from the user's neck or arm, or attached directly to the attachment part of the user's clothes or indirectly via a clip-attached strap.

  A circuit board 21 on which an electronic circuit is formed is provided in the outer case 11. The circuit board 21 is connected to a mode changeover switch 22 for switching between a reception mode and a transmission mode and a plug 133 of the earphone microphone 13. An earphone microphone jack 23 having a hole diameter of 2.5 mm is attached. The circuit board 21 is directly coated with a water-repellent anti-condensation agent containing a fluorine-based synthetic resin, a pigment, a water repellent, an organic solvent and the like by spraying, and can be used in various outdoor use environments. Life waterproofing is given. As long as the material contains at least a water repellent, another material such as a waterproofing agent may be applied.

  FIG. 2 is a diagram showing a circuit configuration of the communication line confirmation device 1. The impedance switching circuit 31, the power acquisition circuit 32, the two amplification circuits 33 and 35, the microphone switch 34, and the side tone synthesis circuit 36 in FIG. Is a circuit formed on the circuit board 21. The mode changeover switch 22 in FIG. 1 is a part of the impedance changeover circuit 31, and the microphone switch 34 is linked with the mode changeover switch 22. The earphone microphone jack 23 shown in FIG. 1 is a connection portion on the main body 10 side connecting the earphone 131 and the amplification circuit 33 and a connection portion on the main body portion 10 connecting the microphone 132 and the amplification circuit 35. The plug 133 serves as both connection portions on the earphone microphone 13 side. The solid line in FIG. 2 indicates the flow of power, and the dashed line indicates the flow of signals (each is simply shown by one line). In addition, between the line connection terminal 12 and the impedance switching circuit 31, and between the impedance switching circuit 31 and the power acquisition circuit 32, power and a signal are transmitted by the same wiring.

  The impedance switching circuit 31 electrically connected to the line connection terminal 12 is set to a high impedance such that the communication line is not dropped or noise is not mixed when the mode changeover switch 22 is in the reception mode. The switching circuit 31 functions as a circuit that acquires a signal via the line connection terminal 12 while maintaining a signal transmitted through a communication line in use. In the case of the transmission mode, the impedance switching circuit 31 is set to a low impedance to the extent that the user's voice signal input from the microphone 132 is transmitted to the communication line via the line connection terminal 12 as described later. .

  The power acquisition circuit 32 acquires power from the communication line via the line connection terminal 12 and the impedance switching circuit 31 by using a rectifier diode. The power obtained by the power obtaining circuit 32 is used as the power of the two amplifier circuits 33 and 35. That is, the communication line confirmation device 1 uses the office-side 48V power supply.

  A signal from the communication line is input to the amplifier circuit 33 via the impedance switching circuit 31 and the power acquisition circuit 32, amplified by the amplifier circuit 33, and output from the external earphone 131. Since the signal is amplified by the amplifier circuit 33, it is possible to stably output even if the earphone 131 is a magnetic earphone. The types of communication lines include digital lines such as analog lines, ISDN (Integrated Services Digital Network) lines, and ADSL (Asymmetric Digital Subscriber Line access system) lines. Output, and in the case of a digital line, a digital signal tone is output. In the receiving mode, the impedance switching circuit 31 has a sufficiently high impedance so that the line does not drop, regardless of the type of line.

  The external microphone 132 is connected to the amplifier circuit 35 via the microphone switch 34, and when the transmission mode is set by the mode switch 22, the microphone switch 34 is turned on, and the impedance switching circuit 31 is set to low impedance. You. As a result, when the user's voice signal from the microphone 132 is input to the amplification circuit 35 and amplified, the amplified signal passes through the power acquisition circuit 32, the impedance switching circuit 31, and the line connection terminal 12. And transmitted to the communication line. The transmission mode is used only when the communication line is an analog line. For example, by connecting the communication line confirmation devices 1 on both the line switch side and the home communication line end side, two communication line confirmation devices 1 are connected. Calls can be made between.

  Also in the transmission mode, a signal from the communication line is output from the earphone 131 via the amplifier circuit 33. On the other hand, the output from the amplifying circuit 35 is also input to the side tone synthesizing circuit 36, and the side tone is input to the amplifying circuit 33 and synthesized. As a result, the side tone is input to the user's ear at the time of transmission / reception in the transmission mode, similarly to a normal telephone, so that a natural conversation is possible.

  As described above, in the communication line confirmation device 1, only the power acquired by the power acquisition circuit 32 from the communication line is used at the time of the communication line confirmation operation, so that there is no need to provide a battery in the main unit 10. Thus, the size and weight of the main body 10 can be reduced. In particular, the amplification of the signal to the earphone 131 and the amplification of the signal from the microphone 132 using the power of the communication line are performed without using a battery, so that the size and weight of the main body 10 can be reduced. The output from the earphone 131 can be made good, and a good call using the microphone 132 can be made possible. In addition, by setting the impedance switching circuit 31 in the reception mode to a high impedance so as not to affect the ADSL line, the checking operation can be performed as it is even on the ADSL line in use.

  In the conventional communication line confirmation device, a battery is indispensable as a power source in accordance with the multifunctionalization. However, in the communication line confirmation device 1 according to the present invention, the function is limited to a necessary minimum, thereby The operation using only the acquired power is realized.

  In addition, the communication line checking device 1 is attached to a user's body or clothes via the attachment ring 14, so that the device can be more easily carried in accordance with the miniaturization of the device.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications are possible.

  The circuit configuration shown in FIG. 2 is merely an example, and the circuit configuration may be appropriately changed as long as substantially the same functions are realized. For example, the function of the impedance switching circuit 31 may be realized by separately preparing a high-impedance circuit and a low-impedance circuit and switching these circuits, and various signals pass through the power acquisition circuit 32. Alternatively, the signal may be transmitted from the line connection terminal 12 to the amplifier circuit 33 or from the amplifier circuit 35 to the line connection terminal 12.

  The earphone 131 and the microphone 132 are not limited to those exemplified in the above-described embodiment, but by using a commercially available earphone microphone as described above, the use of the magnetic earphone by the amplification circuit 33 is particularly effective. By amplifying as much as possible, the price of the communication line confirmation device 1 can be kept low.

  The mounting ring 14 is merely an example of a structure for mounting on a user's body or clothes, and for example, a clip, a hook, a fastening button, or the like may be provided. The shape of the outer case 11 is not limited to a rectangular parallelepiped, and may be an elliptical shape or the like in consideration of design properties.

It is a figure showing the appearance of a communication line check device. It is a figure showing the circuit composition of a communication line check device.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Communication line confirmation apparatus 12 Line connection terminal 11 Outer case 14 Mounting ring 21 Circuit board 22 Mode switch 31 Impedance switching circuit 32 Power acquisition circuit 33, 35 Amplification circuit 131 Earphone 132 Microphone 133 Earphone microphone jack

Claims (8)

A communication line confirmation device used when confirming a communication line,
A line connection unit connected to a communication line;
A signal acquisition circuit that acquires the signal via the line connection unit while maintaining a signal transmitted through the communication line,
A power acquisition circuit that acquires power from the communication line via the line connection unit,
An amplification circuit that amplifies the signal acquired by the signal acquisition circuit;
An earphone connection unit for connecting an external earphone and the amplification circuit,
With
A communication line confirmation device, wherein only the power acquired by the power acquisition circuit is used at the time of the communication line confirmation operation. The communication line confirmation device according to claim 1,
A communication line confirmation device further comprising a magnetic earphone as the external earphone. The communication line confirmation device according to claim 1 or 2,
A microphone connection to which an external microphone is connected,
Another amplification circuit connected to the external microphone through the microphone connection unit and amplifying a signal from the external microphone,
A changeover switch for changing the level of the impedance of the signal acquisition circuit,
Further comprising
When the signal from the external microphone is amplified by the another amplifier circuit, the impedance of the signal acquisition circuit is set low by the changeover switch, and the signal from the another amplifier circuit is transmitted to the signal acquisition circuit. And (c) are sent to the communication line via the line connection unit. The communication line confirmation device according to claim 3, wherein
A communication line confirmation device further comprising a condenser microphone as the external microphone. The communication line confirmation device according to claim 3 or 4,
The communication line confirmation device, wherein the earphone connection portion and the microphone connection portion are provided as an earphone microphone jack having a hole diameter of 2.5 mm. The communication line confirmation device according to claim 1, wherein:
A communication line confirmation device further comprising a mounting means for mounting on a body or clothes of a user. The communication line confirmation device according to claim 1, wherein:
Further equipped with an outer case,
A communication line checking device, wherein a water repellent is applied to a circuit board in the outer case. The communication line confirmation device according to any one of claims 1 to 7,
A communication line confirmation device, wherein the communication line includes an ADSL line.

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