JPS62110204A - Telephone cord - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an outside line cord for a telephone, and more particularly to a cord structure for preventing radio signal tones during a call.

[Conventional technology]

Conventionally, for outside line cords for telephones, a method has been considered in which a shielding wire mesh is wrapped around the signal line or communication line in order to prevent the radio from being mixed in during a call. Figure 3 shows an example. In the case of a parallel code, communication lines 2 and 3 are connected between signal lines 1 and 4.
is fixed to a sheath 6, and a shield wire mesh 7 is placed around the signal lines 1 and 4. If the shielding method is not adopted, as shown in Fig. 4, the paired twisted wires 8 of signal #5i1 and #4 and the bare twisted wires l1i1j9 of communication lines 2 and 3 are twisted together, and an external wire cord with a round structure is used. There is.

[Problem that the invention seeks to solve]

Among the above-mentioned conventional techniques, the shield wire mesh wrapping method uses
Wrapping with wire mesh increases the price in terms of material costs and processing fees. In the case of a round structure, the price increases due to the number of twisting steps. Furthermore, if a cord with a uniform shape is originally required due to the design, a cord with a round structure is not adopted, and the shield wire mesh wrapping method is used, which causes the above-mentioned drawbacks.

[Means for solving problems]

In order to solve these drawbacks, the telephone outside line cord of the present invention incorporates an inductance coil in the cord sleeve provided to securely fix the cord to the telephone body, thereby preventing the radio from being mixed in during an N1 call. .

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a circuit diagram of an inductance coil placed in a cord sleeve used first.

When the outside line cord main body 5 for the telephone receives a radio signal during a call, the cord sleeve 1 fixed to the entrance of the telephone main body
The inductance coil 11 set to 0 prevents radio noise from being mixed in.

〔Effect of the invention〕

As explained above, the present invention uses the inductance coil placed in the sleeve of the sleeved external line cord to prevent radio noise from being mixed in during a call.
The cord shape is not restricted (round or flat), and the inductance coil is located inside the cord sleeve, saving space in the telephone circuit network.

[Brief explanation of drawings]

Fig. 1 and Fig. 2 show an embodiment of the present invention, Fig. 1 is a plan view, Fig. 2 is a core circuit diagram inside the sleeve, and Fig. 3 and Fig. 4 are cross-sectional views of a conventional cord. be.

Claims (1)

[Claims] In the cord having a plurality of telephone lines and a plurality of signal lines, an inductance coil for preventing radio interference is connected to the telephone line or the signal line, and the inductance coil is inserted into a telephone cord sleeve. Cord for telephone.