JPH0774805A - Mobile phone - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to provide a mobile phone capable of emitting a large ringtone. A mobile phone having a horn 5 between a sound emission port 4 of a calling speaker 1 and a sound emission hole 3 formed in a housing 2 of the telephone. The resonance space 6 of the horn 5 is gradually narrowed and widened so that the intermediate portion 7 has the narrowest cross-sectional area, and the intermediate portion forms the throat of the horn 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile phone, and more particularly to a mobile phone capable of emitting a large ringing tone.

[0002]

2. Description of the Related Art A conventional mobile phone has a structure in which a calling speaker 11 is attached to a housing 12 of the phone without a gap so as to prevent the original volume of the speaker from being lost, as shown in FIG. .

However, since the ringing speaker incorporated in the mobile phone is small and the sound pressure is weak, the ring tone may not be heard when the mobile phone is in the bag or in a place where environmental noise is large. In the mobile phone shown in FIG. 4, the sound output hole 13 formed in the housing 12 has a horn shape. However, the housing 12 is thin, and there is almost no effect of increasing a small sound pressure, and the original volume of the speaker is lost. There is only an effect that does not make it.

An object of the present invention is to provide a mobile phone capable of emitting a large ringing sound in order to solve the above problems.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a ringing tone generated by a calling speaker provided in a casing that can be held by one hand, and a sound output provided in the casing. In a mobile phone configured to be emitted to the outside through a hole, a horn having a resonance space whose cross-sectional area is gradually narrowed and gradually widened is provided between the calling speaker and the sound output hole of the housing. It is a mobile phone.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional view of a mobile phone according to an embodiment of the present invention. 1 is a calling speaker, 2 is a housing of a telephone, 3 is a sound emission hole formed in a housing 2, and 4 is a calling speaker. Reference numeral 1 denotes a sound emission port, 5 denotes a horn, and 6 denotes a resonance space of the horn 5. The resonance space 6 has the narrowest cross-sectional area in the middle portion 7, and the middle portion 7 forms the throat of the horn 6.

The horn 5 must be realized in the smallest possible volume in view of the characteristics of the mobile phone. Therefore, the degree of freedom in design is increased by realizing the volume of the calling speaker 1 by twice or less. Also, rubber is used as the material.

FIG. 2 is a perspective view of the mobile phone of FIG. 1 which is an embodiment of the present invention. 8 is a microphone, 9 is a speaker for communication, 10 is a display section, 11 is an antenna,
A sound output hole 3 is formed in the uppermost part of the housing 2.

In the above embodiment, the sound emission port 4 of the calling speaker 1 is designed to face the sound emission hole 3 of the housing 2. However, when they are not opposed to each other, resonance occurs. If both ends of the space 6 are modified so as to face the sound emission port 4 and the sound emission hole 3, respectively, the degree of freedom in design is increased.

FIG. 3 is a sound pressure measurement value, FIG. 3A is a sound pressure measurement value of the mobile phone described in the prior art, and FIG. 3B is a sound pressure of the mobile phone equipped with the horn 5 of FIG. It is a measured value. In addition, the measurement conditions other than the presence or absence of the horn are the same in FIGS. Further, the measurement position is a position 50 cm away from the mobile phone. As can be seen from the figure, in the conventional mobile phone of FIG. 1A and the mobile phone of the present invention of FIG. 2B, the present invention has an average improvement of about 6 dB in the sound pressure average of the operating frequency band 2 KHz to 3 Kz. is doing.

[0011]

As described above, the portable telephone of the present invention is provided with the horn having the resonance space whose cross-sectional area is gradually narrowed and gradually widened between the calling speaker and the sound output hole of the telephone housing. Since it is a mobile phone, the amplification efficiency of such a resonance space is high, and a small ringtone of the calling speaker can be emitted as a loud sound very easily.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a mobile phone which is an embodiment of the present invention.

FIG. 2 is a perspective view of the mobile phone of FIG. 1, which is an embodiment of the present invention.

FIG. 3 is a sound pressure measurement value, FIG. 3A is a sound pressure measurement value of the mobile phone described in the related art, and FIG. 3B is a sound pressure measurement value of the mobile phone of the present invention.

FIG. 4 is a partial cross-sectional view of a conventional mobile phone.

[Explanation of symbols]

 1: Calling speaker 2: Housing 3: Sound emission hole 4: Sound emission port 5: Horn 6: Resonance space 7: Middle part

Claims (1)

[Claims] 1. A portable telephone configured so that a ringing tone generated by a calling speaker provided in a housing that can be held by one hand is emitted to the outside through a sound emission hole provided in the housing. A mobile phone comprising: a horn having a resonance space having a cross-sectional area that gradually narrows and gradually widens between the calling speaker and the sound output hole of the housing.