JPS6033646Y2 - acoustic coupler - Google Patents

Description

[Detailed explanation of the invention] This invention is a so-called acoustic engineering method that connects the mouthpiece of a general telephone and the signal transmitting and receiving elements when transmitting various signals using a telephone line. Concerning improvements in acoustic couplers.

Recently, facsimile transmission of video information such as images and text using telephone lines has become popular.

When carrying out such communications, the terminal equipment of the telephone line is provided with an acoustic coupler that couples with the mouthpiece of the well-known telephone.

For example, as shown in FIG.
The structure is such that it is sufficient to simply place the terminal device on the housing 2 of the terminal device, and an acoustic element such as a speaker or a microphone (not shown) is usually placed in the housing 2 facing the mouthpiece 1.

Therefore, when communicating, the telephone's mouthpiece 1 is connected to the housing 2.
1, a gap is often formed between the mouthpiece 1 and the housing 2, resulting in a lack of airtightness between the opposing acoustic element (not shown).

As a result, ambient noise enters between the mouthpiece 1 and the acoustic element, causing erroneous data to be transmitted during the female role of the signal, or in extreme cases, communication to become impossible.

In addition, in this type of conventional device, the distance between the mouthpiece 1 and the acoustic element changes each time it is placed, and the volume between them also changes, so the frequency characteristics etc. at this joint part change significantly. From an acoustic engineering point of view, accurate signal reproduction was not achieved, resulting in unreliable data transmission.

This proposal has been made in view of these points, and its purpose is to improve the sealing performance during coupling, and to reduce the distance between the mouthpiece 1 and the acoustic coupler, as well as the volume of the hollow space surrounded by the two. An object of the present invention is to provide an acoustic coupler which keeps the constant value constant and makes attachment and detachment of a telephone and a casing as simple as conventional ones.

Further, the feature of the present invention is that a conventional well-known telephone has a handle part 10.
The present invention focuses on the fact that there is a groove 11 between the earpiece and the earpiece 1, and actively utilizes this groove.

Hereinafter, such an acoustic coupler of the present invention will be explained with reference to the drawings.

FIG. 2 is a sectional view showing a part of the proposed coupler, in which 1 indicates one of the mouthpieces of the telephone, for example, the mouthpiece in this case, 10 indicates the handle of the telephone, and 11 indicates the mouthpiece 1 and the handle. A groove is formed when covering the end of 10, 2 is the housing of the device, and 3 is a claw part 3.
1 is a housing having a hollow portion 32; 4 is an acoustic coupling element, for example, a speaker here; and 5 is a mounting screw for the speaker 4.

The hollow portion 32 formed inside the casing 3 described above has a side wall shape approximately the same as the outer shape of the mouthpiece 1, and a second
As shown in the figure, when the mouthpiece 1 is inserted into the hollow portion 32 from above, it is configured to fit together.

The hollow portion 32 is covered at the bottom by the speaker 4, so that when the mouthpiece 1 is inserted from above, the surface of the speaker 4 and the tip of the mouthpiece 1 face each other, and the distance between them is is formed so as to keep it constant.

On the other hand, the hollow part 32 has a claw part 31 that engages with the groove 11 at the end of the side wall thereof, which becomes close to the groove 11 of the telephone when the mouthpiece 1 is inserted thereinto.

The claw portion 31 and the cylindrical body 3 are integrally molded, for example, from a synthetic resin having elasticity, as shown in FIGS. 3 and 4.

As a result, when the mouthpiece 1 is inserted into the hollow part 32 and the claw part 31 and the groove 11 are engaged, the volume of the space surrounded by the surface of the speaker 4 and the tip of the mouthpiece 1 is kept constant. let

The coupler according to the embodiment having the above-described configuration can be configured in the same manner at a coupling portion with an earpiece (not shown) and a sound collecting acoustic element such as a microphone.

Therefore, when used in this type of telephone, the proposed coupler maintains a firm connection between the earpiece and/or the earpiece, maintains the volume of the hollow space constant, and improves airtightness. This enables highly reliable data transmission by blocking external noise.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional acoustic coupler, Fig. 2 is a sectional view of the coupler according to the present invention, Fig. 3 is a side view of the main parts of the coupler according to the present invention, with a part cut away, and Fig. 4 is a sectional view showing a conventional acoustic coupler. The figure is a top plan view of the coupler according to the present invention. 1...Mother and receiver, 10...Handle part, 1
1...Groove, 32...Hollow part, 4...
...Acoustic element, 31...Claw part.

Claims (1)

[Claims for Utility Model Registration] An acoustic coupler applied to a telephone having a groove between at least one of the mouthpiece or the earpiece and the handle, the acoustic coupler being applied to a telephone having a groove between the mouthpiece or the earpiece from one end to the mouthpiece or the earpiece. a hollow part into which the mouthpiece is inserted and whose side wall shape matches the side surface of the mouthpiece or earpiece, and the other end of this hollow part is covered and faces the tip of the mouthpiece or earpiece. an acoustic element disposed on a side wall of one end of the hollow portion, and when the mouthpiece or earpiece is inserted into the hollow portion, the tip of the mouthpiece or the earpiece and the acoustic An acoustic coupler comprising a claw that engages with the groove so as to form a space of a constant volume between the acoustic coupler and the element.