JPH10210121A - Mobile communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the acoustic characteristic of an electroacoustic transducer without degrading the water-proof and dust-proof performance by forming a gap between a cover and the electroacoustic transducer and between the electroacoustic transducer and the communication equipment main body. SOLUTION: A cover 22 made of a non-porous very thin film with water resistance through which passing of a sound wave is not allowed is set between an electroacoustic transducer 15 and a telephone set main body 10. Spacers 23, 24 are fitted to both sides of the cover 22. The spacer 23 is pressed onto a wall face of a seat 17 around a hole 19 and the spacer 24 is pressed onto a microphone case 20 to seal between an inner space 16 and an external space 25 of the telephone set main body 10 together with the cover 22. Thus, a gap 26 is formed between the cover 22 and the electroacoustic transducer 15 and a gap 27 is formed between the cover 22 and the telephone set main body 10 at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone,
More particularly, the present invention relates to a mobile communication device having an improved waterproof and dustproof structure for an electro-acoustic transducer such as a microphone and a speaker.

[0002]

2. Description of the Related Art In a mobile communication device, for example, a portable telephone, a microphone is fitted into a hole B in a seat formed integrally with the device main body, as shown in FIG. I have. A cover D is arranged on the front of the microphone C and is positioned by the microphone C. The cover D is used to protect the microphone C from dust. Usually, a fiber such as a thin cloth is used in consideration of the passage of sound. A thin cloth having eyes, a thicker cloth, a synthetic resin film having a myriad of micropores that do not allow water to pass but allow air to pass are used.

[0003]

The latter waterproof and dustproof structure can prevent water from entering, but since the cover becomes finer, the sound entering the microphone C is attenuated by the cover, and the microphone is sounded. Can't pick up the message properly and can't communicate the correct message to the recipient. Further, such a waterproof and dustproof structure is also adopted for the speaker, but the sound emitted from the speaker by the cover is attenuated, and the sound clarity is reduced.

[0004] It is an object of the present invention to improve the acoustic performance of an electroacoustic transducer without deteriorating waterproof and dustproof performance.

[0005]

In order to achieve the above object, a mobile communication device according to the present invention has an electroacoustic transducer arranged on a front surface of a cover and is incorporated in a communication device main body.
The cover is made of water-resistant non-porous synthetic resin film, and spacers are placed between the cover and the electro-acoustic transducer and the main unit of the communication device to communicate between the cover and the electro-acoustic transducer and with the electro-acoustic transducer. A gap is formed between the device and the main body.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mobile communication device according to the present invention will be described below with reference to FIGS.

The mobile communication device is a mobile phone.
As shown in FIG. 1, the telephone body 10 includes an antenna 11 at an upper portion, a speaker 12 at an upper front portion, and a liquid crystal display panel 13, a push button 14, a microphone 15 and the like at a lower front portion.

As shown in FIG. 2, the microphone 15 is arranged in an internal space 16 of the telephone body 10 and is fitted in a seat 17 inside the telephone body 10. Seat 17
Has a circular cross section, and is formed integrally with the outer wall of the telephone body 10 on the inner surface of the telephone body 10. A hole 18 is provided in the center of the seat 17, and a hole 19 having a smaller diameter than the hole 18 is provided in the telephone body 10 coaxially with the hole 18.

The microphone 15 is housed in a case 20. The case 20 is made of rubber and has a small hole 2 at one end.
1 in the form of a hollow cylinder. The microphone 15 has a case 20 with the diaphragm facing the small hole 21.
The hole 21 of the case 20 faces the hole 19 of the outer wall 18 and is inserted and fixed in the hole 18 of the seat 17.

[0010] A cover 22 is incorporated between the microphone 15 and the telephone body 10. The cover 22
It is made of a nonporous ultrathin film, for example, a synthetic resin film, which has water resistance and does not allow passage of sound waves. The cover 22 is in the form of a flat disk having an outer diameter slightly smaller than the hole 18 in the seat 17, and spacers 23, 24 are attached to both sides. Spacer 23,
24 is made of an elastic body such as rubber having a ring shape having the same outer diameter as the cover 22 and a larger inner diameter than the holes 19 and 21. The spacers 23 and 24 are arranged on both sides of the cover 22 and
And is integrated with the cover 22 as shown in FIG.

The microphone 15 is incorporated into the telephone body 10 by inserting a unit including the cover 22 and the spacers 23 and 24 from the inside of the telephone body 10 into the hole 1 in the seat 17.
8 and by inserting the microphone 15 into the hole 18. When the microphone 15 is assembled, the spacer 23 is pressed against the wall around the hole 19 in the seat 17 and the spacer 24 is pressed against the microphone case 20,
The internal space 16 of the telephone body 10 together with the cover 22
And the outer space 25 and the cover 2
A gap 26 between the microphone 2 and the microphone 15
A gap 27 is formed between the mobile phone 2 and the telephone body 10.

This mobile phone communicates with the speaker 12 at the ear and the microphone 15 at the mouth, like other mobile phones. The voice of the communicator goes to the microphone 19 through the hole 19, but the spacers 23 and 24 cover the gap 26 between the outer wall 18 and the cover 22 as described above.
A gap 27 is formed between the microphone and the microphone 15. The cover 22 can be vibrated by the sound wave of the sound, and the cover itself is made of an ultra-thin synthetic resin film. The light is transmitted to the diaphragm of the microphone 15 without causing any loss.

During use, saliva and rainwater enter the hole 21 through the hole 19, but there is a cover 22 between the hole 19 and the microphone 15, and the cover itself is made of a non-porous synthetic resin film. As a result, not only the cover 22 is not deteriorated by these, but also the cover 22 seals the space between the hole 19 and the telephone body 10 with the inner space together with the spacers 23 and 24.
They do not penetrate into the internal space of the telephone, and can reliably protect the electric parts and electric circuits inside the telephone body including the microphone 15 from short-circuits, etc., and even the waterproof specification in the MIL standard, which is a military standard in the United States, is sufficient. Can be satisfied. Also, even if dust enters through the hole 19 during carrying, similarly, the cover 22 and the spacers 23 and 24 do not reach the microphone 15, so that the electric parts and the electric circuit inside the telephone main body 10 including the microphone are included. No failure occurs.

When the cover 22 is incorporated into the telephone main body 10, the cover 22 and the spacers 23 and 24 are unitized. A gap 26 between the cover 15 and the microphone 15 and a gap 27 between the cover 22 and the telephone body 10 can be formed, so that assembly can be performed very easily.

In the embodiment described above, the cover 20
Although the unit consisting of and the spacers 23 and 24 is incorporated only into the microphone 15, a similar unit is incorporated into the speaker 12 to protect the speaker 12 from rainwater and dust and to improve the acoustic performance of the speaker. You may.

[0016]

As described above, in the mobile communication device of the present invention, since the cover is made of a water-resistant non-porous ultra-thin film, the electro-acoustic transducer can be reliably protected from water and dust. As much as possible, the gap formed by the spacer between the cover and the electro-acoustic transducer and between the cover and the device body when sound enters or is emitted from the electro-acoustic transducer Accordingly, the cover can vibrate, so that the acoustic characteristics of the electroacoustic transducer are not impaired.

[Brief description of the drawings]

FIG. 1 is a front view of a mobile phone as an embodiment of a mobile communication device according to the present invention.

FIG. 2 is an enlarged cross-sectional view around a microphone along the line AA in FIG. 1;

FIG. 3 is a cross-sectional view of a dustproof and waterproof unit for a microphone.

FIG. 4 is a cross-sectional view around a microphone in a conventional mobile phone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Communication apparatus main body 15 ... Electroacoustic transducer 22 ... Cover 23, 24 ... Spacer 26, 27 ... Clearance

Claims (2)

[Claims] In a mobile communication device in which an electroacoustic transducer is incorporated in a communication device main body with a cover disposed on a front surface, the cover is made of a water-resistant, non-porous ultra-thin film, and the spacer is electrically connected to the cover. A moving body disposed between the acoustic transducer and the communication device main body, wherein a gap is formed between the cover and the electroacoustic transducer and between the electroacoustic transducer and the communication device main body. Communication device. 2. The mobile communication device according to claim 1, wherein the cover and the spacer are joined and unitized.