JPH0756530Y2 - Phone structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone structure in which a waterproof member is provided for the purpose of imparting waterproofness to a cordless telephone or the like.

[0002]

2. Description of the Related Art When a conventional waterproof member of this kind is used for waterproofing a cordless telephone or the like, as shown in FIG. 5, an acoustic unit 8 such as a transmitter, a receiver or a sounder is used.
In this case, the waterproof film 4 made of a fluororesin or the like was attached to the inside of the housing case 5.

[0003]

[Problems to be Solved by the Invention] However, in such a structure, since an expensive fluororesin film is used as a waterproof film, it becomes an expensive telephone, and since it is attached to the housing, the sensitivity of acoustic characteristics is greatly increased. However, there was a defect such as a decrease (4 dB or more). Further, since the above-mentioned fluororesin film generally has fine holes, it has a drawback that its resistance to infiltration of soapy water is weak. Therefore, the above-mentioned conventional device has a drawback that it is expensive and the acoustic characteristics are deteriorated.

An object of the present invention is to eliminate the drawbacks of the prior art and to provide a waterproof telephone structure which is inexpensive and has excellent acoustic characteristics.

In order to solve this problem, the telephone structure according to the present invention comprises a waterproof member in which a waterproof base film made of polyester or a thermoplastic elastomer having rubber elasticity is fixedly formed on an annular holding member having a hole in the center. It has a structure arranged away from the housing case and the acoustic unit.

[0006]

According to this structure, an expensive film such as a fluororesin is not used as the waterproof substrate film,
Moreover, since it has no fine holes, it does not infiltrate soap water and the like, and since it is fixedly formed on the annular holding member, it is excellent in handleability in the assembly process. Further, since it is arranged away from the housing case and the acoustic unit, it is possible to exert effects such as excellent acoustic characteristics.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an example of a waterproof member used in the present invention, in which 1 is a waterproof substrate film made of a polyester film or a thermoplastic elastomer having rubber elasticity (hereinafter abbreviated as a waterproof film), 2 Is polyester or ABS
An annular holding member made of a resin or the like having a hole in the center thereof, and forming a heat-sealing layer (not shown) on the waterproof film 1 for adhesion, or for melting and adhering a part of one resin itself It is fixedly formed in.

FIG. 2 shows another example of the waterproof member used in the present invention, in which 1 is a waterproof film, 2 is an annular holding member, and an adhesive layer 3 made of a double-sided adhesive tape or the like as means for fixing and forming them. Is inserted.

FIG. 3 is a sectional view of a waterproof structure as an embodiment of the present invention, in which a waterproof member in which a waterproof film 1 and an annular holding member 2 are fixedly formed is transmitted to a housing case 5 having a sound hole 6 and a transmitter. It is arranged between the acoustic unit 8 such as a container. The waterproof film 1 is sandwiched between a housing case 5 and an elastic annular member 7,
One end of the annular member 7 is sandwiched by the acoustic unit 8 fixed by means not shown.

In such a structure, since the waterproof film 1 does not have fine holes unlike the conventional fluororesin, it is possible to prevent the infiltration of soapy water and the like, and to dispose the waterproof film 1 away from the housing case 5 and the acoustic unit 8. Because
It became a waterproof member with excellent acoustic characteristics. As the waterproof film 1, a polyester film having a thickness of 25 μm or less and a thermoplastic film having a rubber-like elasticity of 20 μm or less (trade name: Labraze Tonen Kagaku) are preferable, and these waterproof films 1 have a thickness of 250 μm or more. Annular holding member 2 made of polyester film or ABS resin
Since it is fixedly formed on, the material is inexpensive, and the assembling process is also a simple method of inserting the waterproof member, so that an inexpensive waterproof structure can be provided.

When the acoustic unit 8 shown in FIG. 3 is a receiver, the outside of the sound hole 6 touches the ear.
At this time, depending on the person, it may be brought into close contact with the ear. At this time, the vibrating portion 1a of the waterproof film 1 is convex toward the acoustic unit 8 side. Further, when the waterproof film 1 is suddenly released from the ear after it comes into close contact with the ear, the waterproof film 1 becomes convex toward the housing case 5 side. Adhesion to and separation from the earpiece on the earphone side is an activity that occurs frequently on a daily basis. At this time, if the waterproof film 1 is a polyester film, it enters the ear as vibration noise of the waterproof film, and the reception sound is heard. It becomes difficult to hear. In that respect, the thermoplastic elastomer having rubber elasticity has a characteristic that this vibration is not heard as noise, and at least the portion of the receiver on the acoustic unit 8 is not applied with the thermoplastic elastomer having rubber elasticity as the waterproof film 1. Was needed.

FIG. 4 is a schematic view of a telephone structure provided with a waterproof member according to the present invention, in which 8a is a receiver, 8b is a transmitter, and 8c is a sounder, and each acoustic unit and housing case 5 are shown. Between the waterproof film 1a, 1
b and 1c are provided. Here, it is shown that at least the waterproof film of 1a uses a thermoplastic elastomer having rubber elasticity.

[0013]

[Effect of the Invention] As described in detail above, the present invention is
Since a waterproof film that can withstand soapy water is used and is arranged away from the acoustic unit and the housing case, a waterproof telephone that is highly waterproof, inexpensive, and has excellent acoustic characteristics is provided. There are advantages.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a waterproof member used in the present invention.

FIG. 2 is a cross-sectional view showing another example of the waterproof member used in the present invention.

FIG. 3 is a cross-sectional view of a waterproof structure of an audio unit according to an embodiment of the present invention.

FIG. 4 is a sectional view showing an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a conventional waterproof structure for an acoustic unit.

[Explanation of symbols]

 1, 1a, 1b, 1c Waterproof film 2 Annular holding member 3 Adhesive layer 4 Waterproof film 5 Housing case 6 Sound hole 7 Annular member 8 Acoustic unit 8a Receiver 8b Transmitter 8c Sounder

Claims (2)

[Scope of utility model registration request] 1. A waterproof member having a thin waterproof base film adhered to a ring-shaped holding member having a hole in the center so as to close the hole, the waterproof base film being the surface of the acoustic unit and the case. A telephone structure in which the waterproof member is disposed between the case and the acoustic unit so as to be separated from the case. 2. The telephone structure according to claim 1, wherein, as the waterproof base film, a resin film made of a thermoplastic elastomer having rubber elasticity is used for at least a handset portion of the acoustic unit. .