CN203181044U

CN203181044U - Simple party line phone anti-eavesdrop switching device

Info

Publication number: CN203181044U
Application number: CN 201320175158
Authority: CN
Inventors: 石兵
Original assignee: SICHUAN JIUDING DIGITAL TECHNOLOGY Co Ltd
Current assignee: SICHUAN JIUDING DIGITAL TECHNOLOGY Co Ltd
Priority date: 2013-04-09
Filing date: 2013-04-09
Publication date: 2013-09-04
Anticipated expiration: 2023-04-09

Abstract

The utility model discloses a simple party line phone anti-eavesdrop switching device, including a first relay, a second relay, a first capacitor and a second capacitor. A first telephone set and a second telephone set are merged at both ends of an exterior line through the first relay and the second relay. The first relay and the second relay are in a release state. Therefore, the first telephone set and the second telephone set are connected with the exterior line. When a call comes, a ringing current voltage makes the two telephone sets ring through coupling capacitors including the first capacitor and the second capacitor. The utility model can achieve anti-eavesdrop switch with minimal components, when the call comes, the person who picks up the telephone first has priority, and the second person cannot hear any sound. The two telephone sets ring simultaneously when a call comes, the person who picks up the telephone first has priority, and the second person cannot hear any sound. During communication, the two telephone sets have mutual confidentiality. The simple party line phone anti-eavesdrop switching device is simple in structure, low in cost, and conducive to promotion.

Description

Simple and easy party-line anti-eavesdrop switching device

Technical field

The utility model relates to a kind of telephone auxiliary equipment, relates in particular to a kind of simple and easy party-line anti-eavesdrop switching device.

Background technology

In many occasions, an outside line also connects the multi-section phone, though the utilance height, confidentiality is too poor; And switching device complex structure of the prior art, the wiring trouble adopts element more, and therefore, cost is higher.

The utility model content

The purpose of this utility model provides a kind of simple and easy party-line anti-eavesdrop switching device with regard to being in order to address the above problem.

The utility model is achieved through the following technical solutions above-mentioned purpose:

The utility model comprises first relay, second relay, first electric capacity and second electric capacity, first end while of described first relay and first end of described first electric capacity, the positive pole of outside line, first end of described second relay is connected with first end of described first electric capacity, second end of described first relay is connected with second end of described first electric capacity and first end of described second relay control switch simultaneously, second end of described second relay is connected with second end of described second electric capacity and first end of described first relay control switch simultaneously, second end while of described first relay control switch and first end of second telephone set, second end of described second relay control switch, first end of first telephone set and the negative pole of described outside line are connected, second end of described first telephone set is connected with the center link of described second relay control switch, and second end of described second telephone set is connected with the center link of described first relay control switch.

The beneficial effects of the utility model are:

The utility model just can be realized the anti-eavesdrop switching with minimum components and parts, and the off-hook person of elder generation has priority during with phone, and back off-hook person is noiseless; Two phone rings simultaneously when answering the call, first off-hook person is in priority, and back off-hook person is noiseless, and two telephone sets are maintained secrecy mutually during conversation, and therefore simple in structure, cost is lower, is beneficial to popularization.

Description of drawings

Fig. 1 is circuit structure schematic diagram of the present utility model.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

As shown in Figure 1: the utility model comprises first relay J 1, second relay J 2, first capacitor C 1 and second capacitor C 2, first end while of first relay J 1 and first end of first capacitor C 1, the positive pole of outside line, first end of second relay J 2 is connected with first end of first capacitor C 1, second end of first relay J 1 is connected with second end of first capacitor C 1 and first end of the second relay control switch J2-1 simultaneously, second end of second relay J 2 is connected with second end of second capacitor C 2 and first end of the first relay control switch J1-1 simultaneously, second end while of the first relay control switch J1-1 and first end of the second telephone set DH2, second end of the second relay control switch J2-1, first end of the first telephone set DH1 and the negative pole of outside line are connected, second end of the first telephone set DH1 is connected with the center link of the second relay control switch J2-1, and second end of the second telephone set DH2 is connected with the center link of the first relay control switch J1-1.

As shown in Figure 1: the first telephone set DH1 and the second telephone set DH2 are attempted by the two ends of an outside line by first relay J 1 and second relay J 2.First relay J 1 and second relay J 2 all are in release condition.So the first telephone set DH1 and the second telephone set DH2 all connect with outside line; When the phone incoming call, ringing-current voltage makes two equal rings of telephone set by coupling capacitance first capacitor C 1 and second capacitor C 2.Suppose first telephone set DH1 elder generation off-hook, then first relay J 1 provides DC channel, its first relay control switch J1-1 adhesive (being that moving contact is converted to the below by the top), thereby the path that has cut off the second telephone set DH2.If second telephone set DH2 elder generation off-hook similarly, then cuts off the first telephone set DH1 path, finished the function of maintaining secrecy mutually thus.When using phone, first off-hook just takies the outside line road earlier, and back off-hook is noiseless.

Claims

1. simple and easy party-line anti-eavesdrop switching device, it is characterized in that: comprise first relay, second relay, first electric capacity and second electric capacity, first end while of described first relay and first end of described first electric capacity, the positive pole of outside line, first end of described second relay is connected with first end of described first electric capacity, second end of described first relay is connected with second end of described first electric capacity and first end of described second relay control switch simultaneously, second end of described second relay is connected with second end of described second electric capacity and first end of described first relay control switch simultaneously, second end while of described first relay control switch and first end of second telephone set, second end of described second relay control switch, first end of first telephone set and the negative pole of described outside line are connected, second end of described first telephone set is connected with the center link of described second relay control switch, and second end of described second telephone set is connected with the center link of described first relay control switch.