KR101094867B1 - Portable electrical device having speaker - Google Patents

Abstract

The present invention adopts a simple mechanical resonant structure without using electronic circuits or algorithms in a portable electronic device capable of outputting a sound or outputting a video with a sound, such as a mobile phone, an MP3 player, a portable AV system, and the like. The present invention relates to a portable electronic device that effectively amplifies and outputs sound realistically, thereby increasing a user's satisfaction with the sound. According to an aspect of the present invention, there is provided a portable electronic device including a pair of speakers; A housing in which a speaker is installed and a rear space is formed at the rear of the speaker; And at least a part of the vibration member installed in the rear space and vibrating by the low frequency sound so that the low frequency sound generated by the speaker is amplified. Between the first rear space and the second rear space is connected to the inner surface of the housing and the partition wall is arranged to isolate the first rear space and the second rear space. The vibrating member is connected to the fixing part on both sides of the fixing part and the fixing part fixed to the partition wall, respectively, and is disposed in the first rear space and the second rear space, respectively, and a pair of vibration parts vibrating in a direction approaching and spaced apart from the speaker, respectively. Include.

Speaker, frequency, mobile phone, resonance, attenuation, distortion, amplification, resonance

Description

Portable electrical device having speaker

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable electronic device, and more particularly, to a portable electronic device capable of outputting a sound or outputting an image together with a sound, such as a mobile phone, an MP3 player, a portable AV system, and the like.

Speakers are indispensable in portable electronic devices capable of outputting sound or outputting images together with sounds, such as mobile phones, MP3 players, and portable AV systems.

However, the speaker provided in such a portable electronic device has the following problems.

First, it is difficult to reproduce low frequency and mid frequency sound because of the size of the speaker and the space where the speaker is installed. Second, when the low frequency sound is excessively amplified by using an equalizer or the like, the distortion is large. Third, in the case where sound is generated from a pair of speakers, the sound generated from each speaker causes mutual interference in the rear space of the speaker, so that not only the sound distortion but also attenuation occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an electronic circuit in a portable electronic device capable of outputting a sound or outputting an image with sound, such as a mobile phone, an MP3 player, and a portable AV system. It is to provide a portable electronic device that can amplify low frequency sound effectively and output the sound realistically by adopting a simple mechanical resonance structure without the algorithm.

In order to achieve the above object, a portable electronic device according to the present invention is a portable electronic device that outputs sound or outputs sound and an image together, comprising: a pair of speakers; A housing in which a pair of speakers are installed and a first rear space and a second rear space are respectively formed at the rear of the pair of speakers; And at least a part of which is installed in the first rear space and the second rear space, respectively, and a vibration member vibrating by the low frequency sound to amplify the low frequency sound generated by the pair of speakers. Between the rear space is connected to the inner surface of the housing and the partition wall for separating the first rear space and the second rear space is arranged, the vibration member is connected to the fixing portion on both sides of the fixing portion and the fixing portion fixed to the partition wall, respectively It is disposed in the first rear space and the second rear space, respectively, characterized in that it comprises a pair of vibrating unit vibrating in a direction approaching and spaced apart from the speaker.

According to the present invention, the following effects can be obtained.

First, the structure of the mechanical resonator installed at the rear of the speaker is very simple.

Second, the resonant frequency of the vibrating member is determined by the mass of the vibrating member and the portion on which the vibrating member is supported, for example, the rigidity of the fixing part or the position fixing member, so that the design is easy.

Third, the frequency bandwidth and the amplitude at the resonance frequency can be adjusted by the attenuation rate.

Fourthly, the low frequency sound of the lower range is greatly amplified than the use of a single speaker.

Fifth, by separating the sound coming from the rear of the pair of speakers, it is possible to minimize the frequency distortion caused by the interference of the sound.

Sixth, a richer bass component, an increase in the low frequency response amplitude, and regeneration according to the extension of the low frequency range make it possible to express human low frequency band hearing well.

1 is a schematic perspective view of a portable electronic device according to an embodiment of the present invention, FIG. 2 is a schematic cross-sectional view of the electronic device shown in FIG. 1, and FIG. 3 is a schematic cross-sectional view of the III-III line of FIG. 2.

1 to 3, the portable electronic device 100 according to the present embodiment may be used as long as it outputs a sound or outputs an image along with the sound, such as a mobile phone, an MP3 player, and a portable AV system. In particular, in the present embodiment, the portable electronic device 100 is configured as a mobile phone, and since the configuration of the mobile phone is already well known, a detailed description thereof will be omitted, and a feature structure for amplifying low frequency sound of the present invention will be omitted. The explanation will be centered.

The portable electronic device 100 includes a pair of speakers 10, a housing 20, and a vibration member 30.

The speaker 10 outputs sound that can be heard by a person. Since the configuration of the speaker 10 is already well known, a detailed description thereof will be omitted herein.

The housing 20 forms an external shape of the portable electronic device 100, and a speaker 10 is installed in the housing 20. A pair of exposure holes 21 are formed on the front surface of the housing 20 so that the pair of speakers 10 are exposed to the outside, respectively. Sound output from each speaker 10 is transmitted to the front of the housing 10 through the exposure hole (21). In addition, the first rear space 22 and the second rear space 23 are formed in the housing 10. The first rear space 22 and the second rear space 23 are respectively disposed at the rear of the space in which the pair of speakers 10 are installed. The first rear space 22 and the second rear space 23 are separated from each other by the partition wall 24. Here, the isolation means that the first rear space 22 and the second rear space 23 are adjacent to each other but do not pass in the horizontal direction in the state shown in FIG. 2 by the partition wall. And, the partition wall 24 is formed long in one direction and is fixed to the inner surface of the housing 10 by an adhesive or welding. However, the partition wall 24 may be formed integrally with the housing 10.

The vibrating member 30 performs a function of amplifying low frequency sound output from the speaker 10. That is, when the low frequency sound is output from the speaker 10, at least a portion of the vibrating member 30 amplifies the low frequency sound by vibrating by the low frequency sound output. The vibrating member 30 is formed in a rectangular plate shape and includes a fixing part 31 and a pair of vibrating parts 32.

The fixing part 31 is fixed to the partition 24 by an adhesive agent, welding, or the like.

The pair of vibration parts 32 are disposed on both sides of the fixing part 31 and are connected to the fixing part 31. The pair of vibration units 32 are disposed in the first rear space 22 and the second rear space 23, respectively, and close the first rear space 22 and the second rear space 23. The pair of vibration parts 32 are hinged in a direction in which the speaker approaches and is spaced around the fixing part 31 as shown by an arrow in FIG. 2 around the fixing part 31 when the low frequency sound is output. Vibrate by exercising. In particular, the vibration unit 32 resonates at a specific frequency. The distance between the edge of each vibrating portion 32 and the inner surface of the housing 20 is preferably reduced as much as possible in order for each vibrating portion 32 to vibrate effectively, and accordingly, the first rear space 22 and the second rear surface. The spaces 23 are each blocked to the rear of the speaker 10 as much as possible. However, when the flexible diaphragm (not shown) is adhered to the inner side of the vibrator 32 and the housing 10 similarly to the embodiment described later using an adhesive material, the edge of the vibrator 32 And a gap between the inner surface of the housing 10.

When the vibrator 32 vibrates, the part of the vibrator 32 farthest from the fixed part 31, that is, the part closest to the inner surface of the housing 20 vibrates with the largest amplitude. The amplitude decreases from the part toward the fixing part.

On the other hand, in order to make the hinge movement of the vibrating portion 32 more smoothly, it is preferable that the groove portion 321 is formed in the vibrating portion 32. The groove 321 is formed concave with respect to the surface of the vibrator 32, the central axis of the groove 321 is parallel to the direction in which the vibrator 32 approaches and spaced apart from the speaker 10. The grooves 321 are formed on both surfaces of each vibrating portion 32, that is, surfaces orthogonal to the thickness direction of the vibrating portion 32, and the central axes of the grooves 321 coincide with each other.

In addition, the vibrator 32 has a plurality of holes 322 formed therethrough. The plurality of holes 322 are passages through which the amplified low frequency sound is output toward the rear of the housing 20.

The cover 40 is coupled to the rear surface of the housing 20. A plurality of holes 41 are formed in the cover 40 so that low frequency sound is output through the cover 40. On the other hand, when the cover 40 is made of a woven cloth or a porous material, it is not necessary to form a plurality of holes.

As described above, in the portable electronic device 100 of the present embodiment, the vibrating member 30 is disposed behind the speaker 10 and the vibrating unit 32 of the vibrating member is output when low frequency sound is output from the speaker 10. By vibrating the low frequency sound can be easily amplified. That is, the low frequency sound is amplified not only in the first rear space 22 and the second rear space 23 but also greatly amplified by the vibration of the vibrating portion 32 of the vibrating member. As described above, in this embodiment, low frequency sound can be amplified by using a very simple mechanical vibration structure without using an electronic circuit or an algorithm. Therefore, it is possible to express the sound of the low frequency band better, thereby increasing the user's satisfaction, and in particular, the frequency response can be similar to the human auditory response curve.

In addition, since the first rear space 22 and the second rear space 23 arranged behind the pair of speakers 10 are formed to be separated by the partition wall 24, the low frequency sound output from each speaker 10. The interference phenomenon can be effectively prevented.

In addition, since the vibrator 32 of the vibrating member may be installed without greatly changing the existing structure of the portable electronic device 100, the weight increase of the portable electronic device may be minimized and the internal space of the housing 20 may be efficiently It can be used as.

In addition, when a pair of speakers 10 are provided, if the resonance magnitude and amplitude at the resonance frequency are adjusted by the attenuation rate, the low frequency sound of the lower band can be amplified significantly as compared with the case where one speaker is provided. .

In addition, it is possible to appropriately select the internal attenuation and to improve the amount of amplification in a wide frequency band. Here, the amount of amplification can be controlled by variables such as material, thickness, mass, stiffness, and attenuation rate of the vibration member. If the parameters are well controlled, the amplification amount can be relatively well matched with the human hearing characteristics, thereby reducing bass loss. Can be offset.

Meanwhile, in the present embodiment, a pair of vibrating parts are formed in the vibrating member, and each vibrating part is configured to vibrate by hinged movement around the fixing part. However, as shown in FIGS. 4 and 5, a pair of vibrating members is provided. It may be configured to be provided.

In the portable electronic device 100a of this embodiment, the pair of vibration members 30a are disposed in the first rear space 22 and the second rear space 23, respectively. Each vibrating member 30a is fixed to the housing 20 by the position fixing member 50.

Position fixing member 50 is preferably made of a flexible material in order to smooth the vibration of the plate shape, in particular the vibration member (30a). The position fixing member 50 has a rectangular shape as a whole, and a through hole of a rectangular shape is penetrated therein. The position fixing member 50 is coupled to the housing 20 and the vibrating member 30a, respectively. In particular, in this embodiment, the adhesive material (not shown) is applied to the rear surface of the positioning member 50, the rear surface of the positioning member 50 as shown in Figure 5 the inner surface of the housing 20 And the vibrating member 30a contacts the vibrating member 30a and hardens the adhesive material, respectively, and the vibrating member 30a is fixed to the housing 20. Here, the adhesive material may be adopted in various forms such as a double-sided tape, and this adhesive material is already well known, and thus a detailed description thereof will be omitted. In addition, the position fixing member 50 is disposed to prevent a gap between the vibration member 30a and the inner surface of the housing 20. Therefore, the first rear space 22 and the second rear space 23 are blocked by the position fixing member 50, the vibration member 30a and the partition wall 24, respectively. Of course, the first rear space 22 and the second rear space 23 communicate with each other through the hole 322 of the vibration member 30a. On the other hand, the position fixing member 50 is preferably composed of a flexible diaphragm (diaphragm) in order to improve the vibration characteristics of the vibration member (30a). Here, the diaphragm may be made of Hanji or soft plastic or a thin rubber material.

In the portable electronic device 100a configured as described above, when low-frequency sound is output from the speaker 10, each vibrating member 30 also vibrates in a direction approaching and spaced apart from the speaker 10 as in the previous embodiment. Done. However, since both edges of the vibrating member 30a are positioned and fixed to the inner surface of the housing 20 by the position fixing member 50, the central portion of the vibrating member 30a vibrates with the largest amplitude and the vibrating member 30a. Amplitude is reduced from the central portion of the) to the portion in contact with the position fixing member 50.

In particular, in setting the resonant frequency of the vibrating member 30a in this embodiment, the material and thickness of the vibrating member, the size of the first rear space and the second rear space, the rigidity of the diaphragm, and the like should be considered. In addition, considering the damping (damping) together, the peak during resonance and the resulting acoustic radiation should also be considered.

As mentioned above, the present invention has been described in detail with reference to preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the technical idea of the present invention. It is obvious.

For example, in the present embodiment, the portable electronic device is configured to include a pair of speakers, but the portable electronic device may be configured to include only one speaker. In this case, the partition wall may be omitted.

1 is a schematic perspective view of a portable electronic device according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the electronic device shown in FIG. 1.

3 is a schematic cross-sectional view taken along line III-III of FIG. 2.

4 is a schematic cross-sectional view of a portable electronic device according to another embodiment of the present invention.

5 is a schematic cross-sectional view taken along the line VV of FIG. 4.

Description of the Related Art

10 ... speaker 20 ... housing

21 ... Exposure 22 ... First Space

23 ... 2nd rear space 24 ... bulkhead

30,30a ... Vibration member 31 ... Fixed

32 Vibration part 40 Cover

41,322 hole 50 position fixing member

100 ... Portable Electronics 321 ... Home

Claims (10)

A portable electronic device that outputs sound or outputs sound and video together, A pair of speakers; A housing in which the pair of speakers are installed and a first rear space and a second rear space are respectively formed at the rear of the pair of speakers; And At least a part of which is installed in the first rear space and the second rear space, respectively, and a vibration member vibrating by the low frequency sound to amplify the low frequency sound generated by the pair of speakers; Between the first rear space and the second rear space is connected to the inner surface of the housing and the partition wall is arranged to isolate the first rear space and the second rear space, The vibration member is connected to both sides of the fixing part fixed to the partition and the fixing part, respectively, and is disposed in the first rear space and the second rear space, respectively, and vibrates in a direction approaching and spaced apart from the speaker. Portable electronic device comprising a pair of vibration unit. delete The method of claim 1, The pair of vibrating portions is formed in a plate shape, The pair of vibrating portions is formed with a recessed portion recessed with respect to the surface of the pair of vibrating portions, And a center axis of the groove is parallel to a direction in which the pair of speakers approaches and is spaced apart from each other. The method of claim 1, The vibration member is made of a plate shape, And a position fixing member coupled to the vibration member and the housing so that the vibration member is fixed in position. And the vibration member vibrates in a direction approaching and spaced apart from the pair of speakers. The method of claim 4, wherein The position fixing member is made of a plate shape, An adhesive material is applied to a surface of the position fixing member which contacts the inner surface of the vibrating member and the housing so as to adhere to the inner surface of the vibrating member and the housing. The position fixing member is formed to block the gap between the vibration member and the inner surface of the housing. delete delete The method of claim 1, Between the first rear space and the second rear space is connected to the inner surface of the housing and the partition wall is arranged to isolate the first rear space and the second rear space, The vibration member is provided with a pair to be respectively disposed in the first rear space and the second rear space, Each vibration member is made of a plate shape, And a position fixing member coupled to each of the vibration members and the housing so that the vibration members are fixed in position. And each vibrating member vibrates in a direction approaching and spaced apart from the pair of speakers. The method of claim 8, The position fixing member is made of a plate shape, An adhesive material is applied to surfaces of the respective position fixing members that contact the inner surfaces of the vibrating member and the housing so as to adhere to the inner surfaces of the vibrating member and the housing. And each position fixing member is formed to block a gap between the vibration member and the inner surface of the housing. The method according to any one of claims 1 and 3 to 5, And a plurality of holes penetrate the vibrating member.

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