CN201657037U - Mobile terminal and sound cavity for same - Google Patents

Abstract

The utility model provides a mobile terminal and a sound cavity for the same, which are used for resolving problems that sound cavities in the existing mobile terminals are easy to enlarge distortion of loudspeakers, and then tone quality of the mobile terminals are reduced. The sound cavity used for the mobile terminal comprises a non-planar sound cavity wall. The technical scheme includes that the sound cavity wall is non-planar, and the non-planar sound cavity wall can prevent sound waves of a loudspeaker from easily generating simple harmonic vibration in the sound cavity, thereby reducing influence to the loudspeaker, decreasing distortion of the loudspeaker, and improving tone quality level of the loudspeaker of the mobile terminal.

Description

A kind of sound chamber and portable terminal that is used for portable terminal

Technical field

The utility model relates to sound chamber technical field, particularly a kind of sound chamber and portable terminal that is used for portable terminal.

Background technology

Along with the function of portable terminal (as mobile phone, Personal Handyphone System, personal digital assistant etc.) is more and more, requirement to portable terminal tonequality level is also more and more higher, especially music portable terminal, intelligent mobile terminal and the 3G of current trend (3rd Generation, third generation digital communication) portable terminal etc.

Audio cavity structure in the existing portable terminal is shown in Figure 1A, and the sound chamber is generally a cube, and six sound chamber walls are arranged, and wherein has the through hole that is used to place loud speaker on a sound chamber wall.Sound chamber wall is the plane normally, and normally parallel (Figure 1B with wherein sound chamber wall be example) of relative sound chamber wall.Such sound chamber wall can cause the loud speaker sound wave producing simple harmonic vibration (shown in Fig. 1 C) in the sound chamber, causes that loudspeaker distortions increases, and then has reduced the tonequality level of portable terminal.

As seen, the sound chamber in the existing portable terminal has the problem that easily causes the loudspeaker distortions increase and then reduce portable terminal tonequality level.

Summary of the invention

The utility model embodiment provides a kind of sound chamber and portable terminal that is used for portable terminal, has the problem that easily causes the loudspeaker distortions increase and then reduce portable terminal tonequality level in order to the sound chamber that solves in the existing portable terminal.

The sound chamber that is used for portable terminal that the utility model embodiment provides comprises:

Nonplanar sound chamber wall.

Described sound chamber wall is the V-type sound chamber wall with continuous V-type groove.

Described sound chamber wall is the U type sound chamber wall with continuous U type groove.

Described sound chamber wall is the pyramid type sound chamber wall with cone of continuous projection.

The portable terminal that the utility model embodiment provides comprises:

The sound chamber, its sound chamber wall is an on-plane surface.

Described sound chamber wall is the V-type sound chamber wall with continuous V-type groove.

Described sound chamber wall is the U type sound chamber wall with continuous U type groove.

Described sound chamber wall is the pyramid type sound chamber wall with cone of continuous projection.

The technical scheme that the utility model embodiment provides, sound chamber wall is designed to nonplanar shape, because nonplanar sound chamber wall makes the loud speaker sound wave be difficult for producing simple harmonic vibration in the sound chamber, thereby reduced influence to loud speaker, reduce the distortion of loud speaker, improved the tonequality level of portable terminal loud speaker.

Description of drawings

Figure 1A is the schematic perspective view in existing portable terminal middle pitch chamber;

Figure 1B is the schematic diagram of a sound chamber wall in existing portable terminal middle pitch chamber;

Fig. 1 C causes the schematic diagram of sound wave simple harmonic vibration for existing portable terminal middle pitch chamber;

Fig. 2 A is used for the schematic perspective view in the sound chamber of portable terminal for the utility model embodiment;

Fig. 2 B is used for the schematic diagram of a sound chamber wall in the sound chamber of portable terminal for the utility model embodiment;

Fig. 2 C is the schematic diagram of the utility model EXAMPLE V type sound chamber wall;

The sound chamber that Fig. 2 D has a V-type sound chamber wall for the utility model embodiment causes the schematic diagram of sound wave anharmonic vibration;

Fig. 2 E is the schematic diagram of the utility model embodiment U type sound chamber wall;

Fig. 2 F is the front view of the utility model embodiment pyramid type sound chamber wall;

Fig. 2 G is the upward view of the utility model embodiment pyramid type sound chamber wall;

Fig. 2 H is the left view of the utility model embodiment pyramid type sound chamber wall;

Fig. 3 A is the schematic perspective view of the utility model embodiment portable terminal;

Fig. 3 B is the schematic diagram of a sound chamber wall in the sound chamber of the utility model embodiment portable terminal.

Embodiment

In order to solve the problem that prior art exists, the utility model embodiment provides a kind of sound chamber and portable terminal that is used for portable terminal.This technical scheme is designed to nonplanar shape with sound chamber wall, because nonplanar sound chamber wall makes the loud speaker sound wave be difficult for producing simple harmonic vibration in the sound chamber, thereby reduced influence, reduced the distortion of loud speaker, improved the tonequality level of portable terminal loud speaker loud speaker.

Shown in Fig. 2 A, the utility model embodiment provides a kind of sound chamber that is used for portable terminal, comprising:

Nonplanar sound chamber wall (Fig. 2 B with wherein a sound chamber wall be example).

Because nonplanar sound chamber wall makes that the loud speaker sound wave is difficult for producing simple harmonic vibration in the sound chamber, thereby has reduced the influence to loud speaker, has reduced the distortion of loud speaker, has improved the tonequality level of portable terminal loud speaker.

Wherein, sound chamber wall can be V-type sound chamber wall with continuous V-type groove (Fig. 2 C with wherein a sound chamber wall be example).

Shown in Fig. 2 D, what the loud speaker sound wave produced in the sound chamber of V-type sound chamber wall is anharmonic vibration, is difficult for producing simple harmonic vibration.Sound wave in the sound chamber can reduce the influence of the diaphragm of loudspeaker like this, thereby has reduced the distortion of loud speaker, has improved the tonequality level of portable terminal loud speaker.In the experiment, measured diameter 28mm loud speaker 0.1W when output, distortion and the distortion the sound chamber of 10 cubic centimetre V-type sound chamber wall in of loud speaker in the sound chamber of 10 cubic centimetres surface sound chamber wall.With 500HZ-10000HZ is example, the arithmetic equal value that the data of getting the distortion of 50 points obtain 2 subharmonic distortions, 3 subharmonic distortions and the total harmonic distortion in the sound chamber of surface sound chamber wall is respectively: 1.532,1.462,2.244, the arithmetic equal value of the 2 subharmonic distortions in the sound chamber of V-type sound chamber wall, 3 subharmonic distortions and total harmonic distortion is respectively: 1.493,1.283,2.124, and promptly the sound chamber of V-type sound chamber wall reduces by 2.56%, 12.21% and 5.34% respectively with respect to 2 subharmonic distortions, 3 subharmonic distortions and the total harmonic distortion in the sound chamber of surface sound chamber wall.

Usually, the sound wave of the frequency of the tone height of decision sound is a first-harmonic, and odd harmonic is the odd number frequency multiplication of first-harmonic, and even-order harmonic is the even number frequency multiplication of first-harmonic.The tone of the first-harmonic decision sound in the sound, and have more aesthetic feeling on the even-order harmonic sense of hearing how, more ear-piercing on the odd harmonic sense of hearing how.Because the harmonic distortion of sound has the greatest impact to 2 subharmonic and 3 subharmonic, the distortion that therefore reduces by 2 subharmonic and 3 subharmonic is particularly important, wherein more meaningful with the distortion that reduces by 3 subharmonic again.

Because the sound chamber of V-type sound chamber wall reduces by 12.21% with respect to the 3 subharmonic distortions in the sound chamber of surface sound chamber wall, therefore, the sound chamber of V-type sound chamber wall is conspicuous to the raising of tonequality level.

In addition, sound chamber wall also can be U type sound chamber wall with continuous U type groove (Fig. 2 E with wherein a sound chamber wall be example).

Sound chamber wall can also be pyramid type sound chamber wall with cone of continuous projection (Fig. 2 F-2H with wherein a sound chamber wall be example).

As shown in Figure 3A, the utility model embodiment also provides a kind of portable terminal, comprising:

Sound chamber 31 (as shown in Figure 3A, sound chamber 31 is fixed on the mainboard 32 of portable terminal), its sound chamber wall are on-plane surface (Fig. 3 B with wherein a sound chamber wall be example).

Because what nonplanar sound chamber wall made that the loud speaker sound wave produces in the sound chamber is anharmonic vibration, is difficult for producing simple harmonic vibration, thereby has reduced the influence to loud speaker, has reduced the distortion of loud speaker, has improved the tonequality level of portable terminal loud speaker.

Wherein, sound chamber wall can be the V-type sound chamber wall with continuous V-type groove, also can be the U type sound chamber wall with continuous U type groove, can also be the pyramid type sound chamber wall with cone of continuous projection.

The above is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.

Claims (8)

1. a sound chamber that is used for portable terminal is characterized in that, comprising:

Nonplanar sound chamber wall.

2. the sound chamber shown in claim 1 is characterized in that,

Described sound chamber wall is the V-type sound chamber wall with continuous V-type groove.

3. the sound chamber shown in claim 1 is characterized in that,

Described sound chamber wall is the U type sound chamber wall with continuous U type groove.

4. the sound chamber shown in claim 1 is characterized in that,

Described sound chamber wall is the pyramid type sound chamber wall with cone of continuous projection.

5. a portable terminal is characterized in that, comprising:

The sound chamber, its sound chamber wall is an on-plane surface.

6. portable terminal as claimed in claim 5 is characterized in that,

Described sound chamber wall is the V-type sound chamber wall with continuous V-type groove.

7. portable terminal as claimed in claim 5 is characterized in that,

Described sound chamber wall is the U type sound chamber wall with continuous U type groove.

8. portable terminal as claimed in claim 5 is characterized in that,

Described sound chamber wall is the pyramid type sound chamber wall with cone of continuous projection.

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