JP2001333475A - Mobile wireless unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a conventional mobile wireless unit in which sound quality is deteriorated because an intrusion-preventing felt is fitted to microphone holes opened on a microphone container chamber and consequently confining sound into a small space in a speech state. SOLUTION: The mobile wireless unit contains a speaker 4 for speech and a microphone unit 8 in a device case 1 having an intrusion-resistant structure. The microphone unit 8 is contained in a microphone container chamber 2b formed in the vicinity of the speaker 4 in the device case 1 and a voice reception port 3 to deliver vibration of the speaker 4 to the microphone unit 8 is opened on part of the microphone container chamber 2b. When a user utters a voice toward the device case 1, the voice of the microphone unit 8 in the microphone container chamber 2b is delivered from the microphone hole 2f opened on the upper face of the microphone container chamber 2b, and simultaneously the vibration of the speaker 4 activated by the voice is delivered to the microphone unit 8 through the voice reception port 3 opened on part of the microphone container chamber 2b to activate the microphone unit 8. Thus, deterioration in the sound quality caused by confined sound can be prevented, thereby attaining a speech in a clear voice.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable wireless device in which a microphone unit (hereinafter simply referred to as a microphone unit) and a speaker are provided in an equipment housing having a waterproof structure.

[0002]

2. Description of the Related Art Conventionally, there is a portable radio of this type using a device housing a having an immersion-proof structure as shown in FIGS.

The equipment housing a is composed of an upper housing b and a lower housing (not shown), and a speaker c is mounted on the upper housing b from the inside. Is provided with a cylindrical microphone case portion d protruding inward.

A printed circuit board e is accommodated in the upper housing b, and a microphone unit g is fitted in a microphone holding member f made of rubber attached to the printed circuit board e. As shown in FIG. 9, the microphone unit g is housed in the microphone housing room h and the microphone opened on the upper surface of the microphone housing room h. An immersion felt j is attached to the hole i from the inside in order to prevent water droplets and dust from entering the microphone storage chamber h from the microphone hole i.

[0005]

However, in a conventional portable wireless device in which an immersion felt j is attached to a microphone hole i opened on the upper surface of a microphone storage chamber h, air is immersed by the immersion felt j. Since the vibration is cut off, there is a disadvantage that the sound is muffled and the sound quality during a call deteriorates.

SUMMARY OF THE INVENTION The present invention has been made in order to improve the conventional disadvantages, and an object of the present invention is to provide a portable radio having an immersion-proof structure in which sound quality during a call is hardly deteriorated.

[0007]

To achieve the above object, a portable wireless device according to the present invention is a portable wireless device in which a speaker for communication and a microphone unit are accommodated in an equipment housing having a waterproof structure. A microphone unit is housed in a microphone housing room formed near a speaker in an equipment housing, and an audio receiving port for transmitting vibration of the speaker to the microphone unit is opened in a part of the microphone housing room.

[0008] With the above structure, when talking to the equipment housing, sound is transmitted to the microphone unit in the microphone housing from the microphone hole opened in the upper surface of the microphone housing, and at the same time, the speaker vibrated by the sound. The vibration of the sound is transmitted to the microphone unit from the sound receiving port opened in a part of the microphone storage room, and the microphone unit is operated. You will be able to make calls.

In order to achieve the above object, a portable wireless device according to the present invention is characterized in that a voice receiving port is formed by a cutout portion formed by cutting out a wall of a microphone storage room.

According to the above configuration, the voice communication unit can be easily formed.

In order to achieve the above object, a portable wireless device according to the present invention has a notch formed on a surface of a microphone storage room facing a speaker.

According to the above configuration, since the vibration of the speaker is transmitted to the microphone unit more efficiently, the deterioration of the sound quality can be reduced.

In order to achieve the above object, a portable wireless device according to the present invention has a notch formed by notching a wall of a microphone storage chamber in a substantially V-shape.

According to the above configuration, the voice receiving unit can be easily and inexpensively obtained.

In order to achieve the above object, in the portable wireless device of the present invention, a microphone storage chamber is closely fitted to a cylindrical microphone case projecting from an inner surface of a device housing and an opening of the microphone case. In addition to a microphone holding member made of an elastic material such as rubber, a voice receiving port is opened by notching an outer peripheral surface of a microphone case portion.

According to the above configuration, the microphone housing can be easily formed in the equipment housing, and the microphone unit can be housed in the microphone housing by fitting the microphone unit into the microphone holding member. Unit assembly work is also facilitated.

Further, the vibration of the speaker is transmitted to the microphone unit in the microphone storage room from the cutout formed on the outer peripheral surface of the microphone case, so that the microphone unit can be operated efficiently.

In order to achieve the above object, in the portable wireless device of the present invention, the microphone storage chamber is closely fitted to a cylindrical microphone case protruding from the inner surface of the device housing and an opening of the microphone case. In addition to the microphone holding member made of an elastic material such as rubber, the sound receiving port is opened by cutting out a part of the microphone holding member.

According to the above configuration, the microphone housing can be easily formed in the equipment housing, and the microphone unit can be housed in the microphone housing by fitting the microphone unit into the microphone holding member. Unit assembly work is also facilitated.

Further, the vibration of the loudspeaker is transmitted to the microphone unit in the microphone storage chamber by the notch formed in the microphone holding member, so that the microphone unit can be operated efficiently.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings shown in FIGS.

FIG. 1 is a front view of the portable wireless device, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. 1, and FIG. is there.

A device housing 1 of a portable wireless device having a waterproof structure.
Is composed of an upper housing 2 and a lower housing (not shown). An immersion-proof packing 9 is interposed between the upper housing 2 and the lower housing to prevent water and dust from entering the equipment housing 1. In addition, a speaker mounting portion 2a and a microphone storage room 2b are formed close to each other in the upper housing 2.

The speaker 4 is mounted on the speaker mounting portion 2a from the inside of the upper housing 2, and the sound emitted from the speaker 4 is emitted to the outside of the equipment housing 1 on the upper surface of the speaker mounting portion 2a. Many sound emission holes 2c are opened.

The microphone storage chamber 2b is provided with a cylindrical microphone case 2 projecting inward from the inner surface of the upper housing 2.
and a microphone holding member 7 for closing a lower end side opening 2e of the microphone case 2d, and a microphone hole 2f formed of a small hole opened on the upper surface of the microphone storage chamber 2b.
Is provided with an immersion felt 5 for preventing water, dust and the like from entering the microphone storage chamber 2b from the inside.

On the other hand, a pair of cutouts 2g are formed in the microphone case 2d which forms the wall surface of the microphone storage chamber 2b by cutting out the opposite portion on the lower end side in a substantially V-shape.

These notches 2g serve as sound receiving ports 3 for transmitting the vibration of the speaker 4 as sound to the microphone housing 2b, and the lower end side opening 2e of the microphone case 2d has a printed circuit board. The cylindrical portion 7b of the microphone holding member 7 attached to the bottom 6 is tightly fitted from below.

The printed circuit board 6 is accommodated in the upper housing 2 in a state where electronic components (not shown) for realizing a wireless function are mounted, and a microphone case portion protruding from the inner surface of the upper housing 2. The microphone holding member 7 is attached to a position corresponding to the lower end side opening 2e of 2d.

The microphone holding member 7 includes a disk portion 7a, a cylindrical portion 7b protruding from the upper surface of the disk portion 7a, and a disk portion 7a.
A pair of legs 7d protruding from the lower surface of the mounting piece 7c protruding from the outer peripheral surface of the printed circuit board 6. The legs 7d are integrally formed of rubber, and the legs 7d are inserted into the mounting holes 6a of the printed circuit board 6. By doing so, the microphone holding member 7 is attached to the printed circuit board 6.

The microphone unit 8 is accommodated in the cylindrical portion 7b of the microphone pressing member 7 with the sound receiving surface facing upward.

A pair of terminals 8 are provided on the bottom of the microphone unit 8.
The terminals 8a penetrate the disk portion 7a of the microphone holding member 7 and protrude below the printed circuit board 6, and are soldered to a circuit pattern (not shown) of the printed circuit board 6. And the cylindrical portion 7 of the microphone holding member 7
The outer peripheral surface b is formed in a tapered shape so that the notch 2g is not closed when the cylindrical portion 7b is closely fitted to the lower end side opening 2e of the microphone case 2d.

Next, the operation of the portable radio device constructed as described above will be described. In assembling the device housing 1, the microphone unit 8 is provided in the cylindrical portion 7b of the microphone pressing member 7 attached to the printed circuit board 6 in advance. And the terminals 8a of the microphone unit 8 are soldered to the printed circuit board 6.

Next, when assembling the printed circuit board 6 into the upper housing 2, the cylindrical portion 7b of the microphone holding member 7 is fitted into the lower end side opening 2e of the microphone case portion 2d from below, so that the microphone can be accommodated. The microphone unit 8 is housed in the chamber 2b. Even when the cylindrical portion 7b of the microphone pressing member 7 is tightly fitted to the lower end side opening 2e of the microphone case 2d, as shown in FIG. The notch 2g is not closed.

After the printed circuit board 6 is accommodated in the upper housing 2 as described above, the lower housing is attached to the upper housing 2 to complete the assembly of the portable wireless device. When talking to the housing 1, the sound reaches the inside of the microphone storage room 2b through the microphone hole 2f opened on the upper surface of the microphone storage room 2b, and simultaneously operates the microphone unit 8 in the microphone storage room 2b. As a result, the cone 4a of the speaker 4 is vibrated.

The vibration of the cone 4a reaches the microphone unit 8 in the microphone storage room 2b from the audio receiving port 3 of the microphone case 2d provided near the speaker 4, and operates the microphone unit 8. 8 is
Since the sound generated by the vibration of the microphone hole 2f and the cone 4a of the speaker 4 is received at the same time, the sound is not muffled, so that the telephone conversation can be performed with good sound quality.

FIG. 5 shows an output level (a) of the portable wireless device according to the embodiment of the present invention in which the voice receiving port 3 is opened by a V-shaped cut-out portion 2g in a microphone case portion 2d forming a microphone storage room 2b. ) And a diagram comparing the microphone output level (b) of the conventional portable wireless device without the voice receiving port 3. From this diagram, the microphone unit is provided with a notch 2 g in the microphone case 2 d. It is clear that the audio output of 8 increases.

In the above-described embodiment, a notch 2g is formed on the outer peripheral surface of the cylindrical microphone case 2d protruding from the inner surface of the upper housing 2 to receive sound generated by the vibration of the speaker 4. Although the voice receiving port 3 is opened, as shown in the modified example shown in FIGS. 6 and 7, the V-shaped portion is formed on the cylindrical portion 7b of the microphone pressing member 7 closely fitted to the lower end side opening portion 2e of the microphone case portion 2d.
The voice receiving port 3 may be opened by forming a cutout 7e having a character shape.

That is, a pair of notches 7e are formed in the cylindrical portion 7b of the microphone holding member 7 attached to the printed circuit board 6 so as to face each other with the central portion therebetween as shown in FIG.

When the printed circuit board 6 is accommodated in the upper housing 2, the cylindrical portion 7b of the microphone pressing member 7 is fitted into the lower end side opening 2e of the microphone case portion 2d from below, so that the microphone housing chamber is closed. The microphone unit 8 is accommodated in the microphone holding chamber 2b, and the inside and outside of the microphone housing chamber 2b are communicated with each other by a cutout portion 7e formed in the cylindrical portion 7b of the microphone holding member 7 as shown in FIG. The vibration of the cone 4a of the speaker 4 vibrated by the sound is transmitted from the notch portion 7e into the microphone storage room 2b, and the microphone unit 8 in the microphone storage room 2b is operated. Since the sound is not muffled as in the case of the embodiment, it is possible to make a call with good sound quality.

[0040]

As described above in detail, according to the present invention, a microphone unit is housed in a microphone storage room formed near a speaker in an equipment housing, and the vibration of the speaker is stored in a part of the microphone storage room. When the user speaks into the equipment housing, the voice of the microphone unit in the microphone storage room is transmitted from the microphone hole opened on the top of the microphone storage room. Since the vibration of the speaker vibrated by the microphone unit is transmitted to the microphone unit from the voice receiving port opened in a part of the microphone storage room and the microphone unit is operated, deterioration of sound quality caused by muffled sound can be prevented. This makes it possible to communicate with clear voice.

Further, the microphone storage chamber is made up of a cylindrical microphone case protruding from the inner surface of the device housing and a microphone pressing member made of an elastic material such as rubber tightly fitted into the opening of the microphone case. In addition to the configuration, since the audio receiving port is opened by notching the outer peripheral surface of the microphone case portion or a part of the microphone holding member, the microphone storage chamber can be easily formed in the device housing, and the microphone can be easily formed. By fitting the microphone unit into the holding member, the microphone unit can be stored in the microphone storage chamber, which facilitates the assembling work of the microphone unit and cuts the outer peripheral surface of the microphone case portion and the microphone holding member. Since the vibration of the speaker is transmitted to the microphone unit in the microphone storage room from the notch, the microphone unit can be operated efficiently.

[Brief description of the drawings]

FIG. 1 is a front view of a portable wireless device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is an exploded perspective view of the portable wireless device according to the embodiment of the present invention.

FIG. 5 is a diagram showing microphone output levels of a portable wireless device of the present invention having a V-shaped cutout portion in a microphone case portion, and a conventional portable wireless device having no sound receiving port.

FIG. 6 is an exploded perspective view showing a modification of the portable wireless device according to the embodiment of the present invention;

FIG. 7 is a sectional view showing a modification of the portable wireless device according to the embodiment of the present invention;

FIG. 8 is a front view of a conventional portable wireless device.

FIG. 9 is a sectional view taken along the line CC of FIG. 8;

FIG. 10 is a sectional view taken along line DD of FIG. 8;

FIG. 11 is an exploded perspective view of a conventional portable wireless device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device housing 2 Upper housing 2a Speaker mounting part 2b Microphone storage room 2c Sound emission hole 2d Microphone case part 2e Opening 2f Microphone hole 2g Notch part 3 Audio receiving port 4 Speaker 4a Cone 5 Dampproof felt 6 Printed circuit board 6a Mounting hole 7 Microphone holding member 7a Disk portion 7b Cylindrical portion 7c Mounting piece 7d Leg 7e Notch 8 Microphone unit 8a Terminal 9 Waterproof packing

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuya Tanioka, 4-1-4 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Matsushita Communication Industrial Co., Ltd. No.3-1, Matsushita Communication Industrial Co., Ltd. F-term (reference) 5D017 AB05 5K011 AA01 AA07 AA14 DA17 JA03 KA00 5K023 AA07 BB25 PP01 PP11 QQ04 RR08

Claims (6)

[Claims] 1. A portable wireless device in which a telephone speaker and a microphone unit are accommodated in a device housing having a waterproof structure, wherein the microphone is provided in a microphone storage room formed near the speaker in the device housing. While storing the unit,
A portable wireless device, wherein a voice receiving port for transmitting vibration of the speaker to the microphone unit is opened in a part of the microphone storage room. 2. The portable wireless device according to claim 1, wherein the voice receiving port is formed by a cutout portion formed by cutting out a wall of the microphone storage room. 3. The portable wireless device according to claim 2, wherein the notch portion is formed on a surface of the microphone storage chamber facing the speaker. 4. The portable wireless device according to claim 2, wherein the notch portion is formed by notching a wall surface of the microphone storage chamber in a substantially V-shape. 5. A microphone made of an elastic material such as rubber and the like, wherein the microphone storage chamber is provided with a cylindrical microphone case protruding from an inner surface of the device housing and an opening tightly fitted in an opening of the microphone case. The portable wireless device according to any one of claims 1 to 4, wherein the portable wireless device comprises a pressing member, and the voice receiving port is opened by notching an outer peripheral surface of the microphone case portion. 6. A microphone made of an elastic material such as rubber tightly fitted in a cylindrical microphone case portion protruding from an inner surface of the device housing and an opening of the microphone case portion. The portable wireless device according to any one of claims 1 to 4, wherein the portable wireless device comprises a pressing member, and the sound receiving port is opened by cutting out a part of the microphone pressing member.