KR100819406B1 - Resonance Structure for Improving Speaker Sound of Mobile Devices - Google Patents

Abstract

The present invention relates to a speaker sound resonance structure of a portable terminal, comprising: an upper case frame made of metal, a lower case frame made of metal formed in a predetermined space therein in combination with the upper case frame, and the upper and lower case frames Speaker phone mode of the terminal, including at least one speaker device mounted in a part of the space formed by the sound insulating material having a predetermined thickness to surround the speaker device to form a constant sound pressure of the speaker sound emitted from the speaker device At the time, even when the same speaker device is applied, the sound pressure is further improved by the sound absorbing material and the metal case frame, and high quality voice and sound are output thereby improving convenience of the terminal.

Description

Resonance Structure for Improving Speaker Sound of Portable Terminals {RESONANCE STRUCTURE FOR IMPROVING SPEAKER SOUND IN PORTABLE TERMINAL}

1 is a perspective view of a portable terminal having a resonance structure for improving speaker sound according to the present invention;

2 is a detailed block diagram of an earpiece portion of a portable terminal according to the present invention;

3 is an enlarged photograph of the configuration of FIG. 2 according to the present invention;

4 is a graph showing a result of measuring the sound pressure for each frequency of the ear piece portion to which the resonance structure according to the present invention is applied; And

FIG. 5 is a graph illustrating a measurement result of total harmonic distribution (THD) of frequencies of an ear piece to which a resonance structure according to the present invention is applied. FIG.

The present invention relates to a portable terminal having a speaker phone function, and more particularly, to a resonance structure for improving speaker sound of a portable terminal implemented to emit improved speaker sound using the same speaker.

In recent years, as handheld wireless terminals are rapidly spread by individuals, terminal manufacturers have more diverse functions, but are racing to satisfy user's purchase needs by reducing the size of the devices. In particular, efforts have been made to reduce the volume of the terminal while performing the functions of essential components that must be configured in the terminal, such as a display device, a speaker phone device, and a microphone device.

In particular, among the above-described functions, the speaker device is installed separately from the receiver device in the terminal, and is generally installed in the earpiece of the terminal to make a call so that the user can hear or use an additional function of the terminal. When it works. The additional functions described above may be used for listening to music or sound through an MP3 player, watching over-the-air through a digital multimedia broadcast (DMB) module, and in this case, the speaker device may perform a stereo function. At least two are installed at regular intervals.

On the other hand, portable terminals have been gradually slimmer in recent years. Accordingly, speaker devices, receiver devices, vibrators, and the like, which are generally installed in the earpiece part, are also miniaturized and the installation structure is simplified.

However, due to such miniaturization and installation simplification, the speaker device is emitted from the speaker device due to the absence of a resonance space because only the bushing degree for fixing the speaker device is formed in the case frame even if there are no specific partition walls at all. There was a problem that a bad speaker sound occurs by the sound pressure is significantly reduced. Furthermore, the upper and lower case frames of the terminal providing the accommodation space of the speaker device are also made of a plastic material, so that the sound is often shaken or torn in the speaker phone mode of the terminal.

In order to solve the problems as described above, an object of the present invention is to provide a resonance structure for improving the speaker sound of a portable terminal implemented to emit a higher quality sound than the conventional speaker device.

Another object of the present invention is to provide a resonance structure for improving the speaker sound of a portable terminal implemented to change the material of the terminal case frame for accommodating the speaker device to prevent the shaking of the speaker sound emitted to the earpiece. have.

Still another object of the present invention is to provide a resonance structure for improving speaker sound of a portable terminal, which can be implemented to emit a high quality speaker sound, thereby realizing a high quality terminal.

In order to solve the above object, the present invention provides a speaker sound resonance structure of a portable terminal, the upper metal case frame, the lower metal case is coupled to the upper metal case frame to form a predetermined space therein At least one speaker device mounted in a part of the space formed by the upper and lower metal case frames, and a predetermined thickness that surrounds the speaker device to form a constant sound pressure of the speaker sound emitted from the speaker device. Characterized by including sound insulation.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, if it is determined that the gist of the present invention may be unnecessarily obscured, the detailed description thereof will be omitted.

In describing the present invention, a slide type terminal is illustrated and described. However, the speaker sound resonance structure according to the present invention is applicable to various portable terminals having a speaker phone function.

1 is a perspective view of a portable terminal 100 having a resonance structure for improving speaker sound according to the present invention, the main body 110, the main body 110 in the longitudinal direction of the terminal 100 by a predetermined length And a slide body 120 for performing a sliding operation.

The keypad assembly 111 including a plurality of key buttons is installed on the visible surface of the main body 110 in a state in which the slide body 120 is completely opened (the state of FIG. 1), and the microphone device is disposed under the slide body 120. The conversation part 112 which has is provided.

The display device 123 is installed on the slide body 120 over the front surface, and an earpiece part 20 is installed above the display device 123, and the display device 123 of the display device 123 is provided. Underneath is another keypad assembly 124 that includes navigation key buttons.

The slide body 120 configures the appearance of the terminal in a form in which the upper case frame 121 and the lower case frame 122 are coupled to each other. The upper and lower case frames 121 and 122 have an inner space formed therein. There is provided a resonance structure comprising a speaker device (21, 22) and a sound insulating material (31, 32, 33) according to the present invention.

2 is a detailed configuration diagram of an earpiece part of a portable terminal according to the present invention, and FIG. 3 is an enlarged photograph of the configuration of FIG. 2 according to the present invention, and is provided on the inner surface 125 of the upper case frame 121. Although the resonance structure according to the present invention is constructed, it may be installed in the lower case frame 122 according to the installation space of the terminal, and the upper and lower case frames 121 and 122 may be used simultaneously.

As shown in FIG. 2, a substrate 27 for a display device is installed on the inner surface 125 of the upper case frame 121, and two speaker devices 21 are provided in a space where the substrate 27 is not installed. 22), the receiver device 25 and the vibrator 23 are provided at regular intervals. The speaker device 21, 22, and the vibrator 23 may be closely fixed to each other by a bushing 126, 127, 128 having a predetermined shape protruding from the inner surface 125 of the case frame 121. . Again, the receiver device 5 and the vibrator 23 will be electrically connected to the substrate 27 by some flexible printed circuit (FPC) 24, 26. Although not shown, the two speaker devices 21 and 22 are also electrically connected to the substrate 27 by a predetermined thin wire cable or the like.

Thereafter, the sound insulation materials 31 and 32 having a predetermined thickness according to the present invention are installed to surround the respective speaker devices 21 and 22. In this case, the sound insulation materials 31 and 32 are applied to have thicknesses that can be in contact with the inner surfaces of the upper and lower case frames 121 and 122, respectively, so that sound through the speaker devices 21 and 22 does not leak to the outside. Spaces S1 and S2, respectively. The speaker sound generated by the speaker devices 21 and 22 by the sealed spaces S1 and S2 forms a predetermined sound pressure, and then may be smoothly emitted to the unsigned speaker hole of the ear piece 20 shown in FIG. 1. There will be. That is, the sound insulation materials 31 and 32 allow the sound emitted from the speaker devices 21 and 22 to be emitted only to the speaker hole.

Furthermore, another sound insulation material 33 is provided between the substrate 27 and the sound insulation materials 31 and 32 surrounding the two speaker devices 21 and 22 to be emitted from the speaker devices 21 and 22. Sound may be prevented from escaping to the LCD module of the substrate 27. As the sound insulating materials 31, 32, and 33, a known sponge material, poron, or the like may be attached in place in the form of a tape.

On the other hand, even when the sound insulating material (31, 32, 33) is formed to achieve a smooth sound pressure, the upper and lower case frame (121, 122) is made of a plastic material, so the sound is shaken when the speaker sound is emitted, or the case frame The ringing (121, 122) will occur. Therefore, in the present invention, the upper and lower case frames 121 and 122 are formed of a metal material. Preferably, the metal material may be formed of a magnesium material or an aluminum material.

Figure 4 is a graph showing the sound pressure measurement results for each frequency of the ear piece to which the resonance structure according to the present invention is applied, A is a conventional resonance structure, B is a resonance structure with a sound insulating material according to the present invention, C is In addition to the configuration of B, a resonance structure in which an upper and lower case frame made of magnesium is applied is shown.

In general, when the speaker phone function is used in a portable terminal, the voice band is concentrated at 1.2 KHz to 1.3 KHz. In FIG. 4, it can be seen that B and C sequentially increase sound pressures in this band, compared to the conventional A. FIG.

Figure 5 is a graph showing the results of measuring the total harmonic distribution (THD; Total Harmonic Distribution) of the ear piece to which the resonance structure according to the present invention, A is a conventional resonance structure, B is a sound insulating material according to the present invention In addition to the configuration of B, C represents a resonance structure to which a magnesium upper and lower case frames are applied.

In addition, it can be seen that the distortion ratio of B is lower than A and C is significantly reduced than B in the voice band of 1.2 KHz to 1.3 KHz when the speaker phone mode is used.

Apparently, there are many ways to modify these embodiments while remaining within the scope of the claims. In other words, there may be many other ways in which the invention may be practiced without departing from the scope of the following claims.

In the portable terminal according to the present invention, even when the same speaker device is applied, a more improved sound pressure is formed by the sound insulation material and the metal case frame, and the high quality voice and sound are output thereby resulting in improved convenience of the terminal. There is.

Claims (5)

Upper metal case frame; A lower metal case frame coupled to the upper metal case frame to form a predetermined space therein; At least one speaker device mounted in a part of a space formed by the upper and lower metal case frames; And Resonance structure for improving the speaker sound of the portable terminal, characterized in that it is installed so as to surround the speaker device to form a predetermined sound pressure of the speaker sound emitted from the speaker device. The method of claim 1, The sound insulation material is a resonance structure for improving the speaker sound of the portable terminal, characterized in that the thickness of the contact is installed from the inner surface of the upper metal case frame to the inner surface of the lower metal case frame. The method of claim 2, The sound insulation material is a resonance structure for improving speaker sound of a portable terminal, characterized in that any one of a sponge, a poron (poron). delete The method of claim 1, The upper and lower metal case frame is a resonance structure for improving the speaker sound of the portable terminal, characterized in that formed of magnesium material.

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