JPS61256850A - Preventing plug for radio wave of telephone set - Google Patents

Abstract

PURPOSE:To obtain the radio wave preventing plug of a telephone set which can easily perform a countermeasure for radio wave prevention by interposing and connecting the radio preventing plug which has a troidal core between the modular jack of the telephone set and a modular plug attached to the connection code of a handset. CONSTITUTION:After the modular plug that is attached to the connection code of the handset is inserted to the modular jack 91 of a plug main body 9, a modular jack 92 is inserted to the modular jack of the telephone set with depressing a stop 10 attached to the side plane of the plug main body 9. A contact 911 is embeded at a part where is performed with mold with a part of a connection line 90 and is conducted to the direction of a jack part 92 with being wound for several times on a troidal core 51 and is connected with a plated contact 921 provided at the end part of the jack part 92. The contact 921 is provided corresponding with each connecting line 90 and an exposed part is connected to a jack part provided at the main body of the telephone set and conduction is obtained by engaging with the contact of the jack part.

Description

[Detailed Description of the Invention] [Summary] A radio wave prevention plug having a toroidal core is interposed between a modular jack of a telephone and a modular error plug attached to a connection cord of a handset and a handset.

[Industrial application field]

The present invention relates to a radio wave prevention plug for a telephone, and more particularly to a radio wave prevention plug for a telephone that is connected to a connecting portion between a telephone and a handset via a radio wave prevention plug as a countermeasure against radio wave interference.

In recent years, computers and the like have been introduced in all departments, including manufacturing departments and administrative departments, to improve work efficiency, and are especially used on desks in administrative departments. Therefore, mutual interference between devices is unavoidable, and telephones are no exception.The curled cord that connects the telephone and the handset can pick up interference radio waves and interfere with the transmission and reception of telephone calls. There is a strong demand for the development of a plug for preventing radio waves that is easy to take measures to prevent radio waves.

(Prior Art) FIG. 4 is an internal plan view of a telephone equipped with conventional measures against radio wave interference.

In the figure, a package 2 equipped with a circuit (not shown) is mounted in a bottom case 11 of a telephone 1 made of a synthetic resin molded product, and a toroidal core 5 is mounted adjacent to an input/output connector 3 of this package 2 , and wind the lead wire 6 around this toroidal core 5 several turns, or install a choke coil (not shown) in the package 2 to block high frequencies and connect it to the handset/receiver side. - A method of leading to jack 4 is adopted.

[Problem that the invention seeks to solve]

Regarding the above-mentioned conventional radio wave prevention measures for telephones, in order to apply such radio wave prevention measures to all existing telephones, it is necessary to remove the case of the phone and work, which is not easy to do, so it is difficult to carry out the work. Must be performed by a technician
There was a problem that the cost would increase.

[Means for solving problems]

The present invention solves the above-mentioned problems and provides a plug for preventing radio waves of a telephone, which can easily take measures to prevent radio waves.

That is, the plug main body 9 is provided between the modular jack 4 for handset and the modular plug 81, and the modular jack 91 of the plug main body 9 and the modular error plug 9
This problem can be solved by attaching a toroidal core 51 between the two and winding the connecting wire 90 around the toroidal core 51 several turns.

[Effect]

To install the electromagnetic wave prevention plug of the above-mentioned telephone, remove the modular plug 81 attached to the connection cord 8 of the transmitter/receiver 7 from the modular jack 4 of the telephone 1.
1 into the modular jack 91 of the plug body 9, then insert the modular plug 92 of the plug body 9 into the telephone 1.
Anyone can easily install it by simply inserting it into the modular jack 4.

〔Example〕

FIG. 1 is a plan view illustrating an embodiment of the invention, in which the same parts as in FIG. 4 are given the same reference numerals.

In the figure, a connection cord 8 for a transmitter/receiver 7 is connected to a modular jack (not shown) of a telephone 1 made of a synthetic resin molded product.
After removing the modular plug 81 attached to the plug body 9 and inserting the modular plug 81 into the modular jack 91 of the plug body 9 that accommodates a toroidal core (not shown) in which a connection wire 90 is wound several turns, In this structure, a modular plug 92 is inserted into a modular jack (not shown) of the telephone 1.

FIG. 2 shows an external perspective view for explaining the electromagnetic wave prevention plug of the present invention, and FIG. 3 shows details of the plug of the present invention, and FIG. 3(a) is a cutaway perspective view of the main part.

Figure 3(b) shows a front view, Figure 3(C) shows a side view, and Figure 3(dl) shows the main parts of the plug in Figure 3(C).Each figure shows the same parts. are given the same symbol.

In FIG. 2, a toroidal core is attached between a module jack 91 and a module plug 92 inside a plug body 9 made of a synthetic resin molded product and consisting of a module jack 91, a module plug 92, and a stopper 10, and a connecting wire After inserting the module plug 81 shown in FIG. 1, which is attached to the connection cord 8 of the handset, into the module jack 91 of the plug body 9, which has a plug body 9 wound several turns, the stopper 10 attached to the side of the plug body 9 is inserted. The module plug 92 may be inserted into the module jack 4 of the telephone while being held down.

When the plug body 9 is to be removed from the telephone, the plug body 9 can be pulled out after pressing the plug 10 with a finger.

Figure 3 (al shows a partially cutaway perspective view of Figure 2,
This shows that a tridal core 51 is mounted.

A front view seen from the direction of the arrow A in FIG. 3 (al) is shown in FIG. 3 (bl). In this FIG. 3 (b), the jack 91
Four elastic contacts 911 for electrical connection are provided at the portion. Figure 3(C) is the same as Figure 3(C).
A side view seen from the direction of arrow B in a) is shown, and is partially cut away. The contact 911 is embedded in the molded part together with a part of the connection wire 90, is wound around the tridal core 51 several times and led out toward the jack part 92, and is attached to a plate-shaped part provided at the end of the jack part 92. It is connected to the contact 921 of. This contact 921 is provided corresponding to each connection line 90, and as shown in FIG. 3(d) when viewed from the direction of arrow C, one end of the contact 921 is exposed. This exposed portion engages with the jack portion 4 (equivalent to jack portion 91) provided on the main body of the telephone, contacts the contact (equivalent to 911) of the jack portion 4, and conduction is established.

In addition, as for the structure of the plug main body in the present invention, the jack portion 91 is similar to the jack portion 4 of a telephone. The plug portion 92 is a plug portion 8 that is attached to the end of the connection cord 8 on the handset side.
It has a structure corresponding to 1.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, countermeasures against radio wave interference in telephones can be easily implemented, and if mass-produced, it will be extremely effective in reducing costs.

[Brief explanation of drawings]

Fig. 1 is a plan view illustrating one embodiment of the above invention, Fig. 2 is an external perspective view illustrating the electromagnetic wave prevention plug of the present invention, and Fig. 3 (3) shows the plug of Fig. 2. Partially cutaway perspective view. (in Figure 3) is a front view, Figure 3 (C) is a side view, Figure 3 (
d)' is an enlarged view of the main parts of the plug in Figure 3 (C1), and Figure 4 is an internal plan view of a telephone equipped with conventional radio interference countermeasures. In the figure, 1 is the telephone, 2 is the package, 3 is a connector, 4 and 91 are modular jacks, 5 is a toroidal core, 6 is a lead wire, 7 is a handset, 8 is a connection cord,
9 is the plug body, 10 is the stopper, 11 is the case, 81
．． Reference numeral 92 indicates a modular plug. $1 Figure 2 Figure 4

Claims (1)

[Claims] A toroidal core (51) is provided between the modular jack portion (91) and the modular plug portion (92) of the plug body (9).
), and a modular connection cord (
A radio wave prevention plug for a telephone, characterized by winding several turns of 90).