JP2012175255A - Horn device for mobile phone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a horn device in which acoustic power and sound quality of a mobile phone can be leveled up to enjoying in a listening space having a suitable area by loading the mobile phone as it is.SOLUTION: A first horn H1 and a second horn H2 are formed with a sound source chamber formed by loading one end of a mobile phone 50 at a speaker built-in side into a loading slot 3S so as to be inserted as a common sound source chamber, and horn loads are concurrently applied to a sound of the mobile phone 50 by the two horns H1 and H2. In such a case, the first horn H1 and the second horn H2 are formed to be opened in opposite directions with the sound source chamber therebetween. An emitted sound from any one horn is utilized as a direct sound toward a listener and an emitted sound from the other horn is utilized as an indirect sound, thereby forming a sound field rich in presence containing enriched indirect sound components.

Description

  The present invention is for a mobile phone that can secure a sufficient sound volume in a certain listening range while using a mobile phone with a limited sound output that can be enjoyed only at a close listening position as a sound source for the original purpose of the device. Relates to the horn device.

  Whether it is in favor or not, the so-called ubiquitous socialization is progressing in the information communication related aspect of the social structure. If the ubiquitous society is literally aimed at creating an information environment, anytime, anyone, anywhere, it can be said that the mobile phone is the most realistic and familiar item for that purpose. In fact, mobile phones have frequently undergone generation changes in a short period of time, and have a function as a portable information terminal and a function as a portable music player.

  Here, when focusing on the aspect of the mobile phone as a portable music player, the music playback capability of the mobile phone is not limited to the fact that a digital communication environment in which a rich music library is provided with excellent sound quality is formed. It must be said that it is very poor. This is not a shortcoming of the mobile phone, but is a natural consequence of the assumption that the acoustic characteristics of the mobile phone are set at the ear.

  Actually, for example, when a mobile phone is placed in one corner of a room and listening to favorite music and trying to do everyday chores, first of all, it is felt that there is an absolute lack of sound output. There are various electrical solutions to this problem. For example, the line output of a mobile phone is amplified by a stereo amplifier and listened to by a stereo device. Alternatively, the line output of the mobile phone is taken into a PC and listened to in an audio environment for the PC. However, relying on such a solution results in the loss of the most advantageous characteristics of the portable device that it is easy and convenient anytime and anywhere.

  Therefore, as a measure to increase the sound output of a mobile phone without relying on electrical means, a mobile phone sound box that also serves as a mobile phone stand that can load a horn load on the sound of the mobile phone is proposed. (See Patent Document 1 below).

  In the technical field of audio equipment, a method of loading a speaker with a horn load as a means for improving the efficiency of the speaker is known, and the efficiency improvement effect due to an appropriate load of the horn load can be dramatic. Are known. This effect can be experienced by an experiment in which a horn of a horn type speaker is attached or detached.

  However, there is a lot of doubt as to whether an effective horn load can be loaded on a sound source unit built in an exterior case, such as a mobile phone, instead of a speaker unit or a driver unit alone. This is because in a horn type speaker, the horn's sound path from the speaker unit as a driver to the final horn opening is required to be in a strictly airtight state. Therefore, it can be said that the idea of loading a horn load on the speaker unit in the outer case is only a nonsense idea from the viewpoint of an acoustic technology expert.

Nevertheless, while discovering that an effective horn effect can be easily imparted to the internal speaker unit simply by placing a mobile phone, the objective horn effect was confirmed by recording objective acoustic characteristics. The inventor's practical research mind is tempered (see Patent Document 1 below).

JP2005-184050

By the way, although the proposal described in the above-mentioned Patent Document 1 has been allowed to precede, in view of the trend of mobile phone information terminals, especially music information terminals, we have also conducted research on prototypes of horn devices for mobile phones. As we proceeded, we have come to the following conclusions.

  In order to obtain a sufficient horn effect, it is preferable to use a large horn having high horn load characteristics. However, as long as a mobile phone is used as a sound source, the driving force of the built-in speaker is extremely limited. Therefore, the horn load cannot be driven completely, and only a specific band becomes an unnatural acoustic characteristic emphasized by the horn effect. Further, in a large horn device in which a high sound pressure is concentrated on the throat portion of the horn, the mobile phone cannot be completely sealed because the acoustic connection portion between the mobile phone and the horn cannot be made into a perfect airtight structure. Problems such as changes in the horn characteristics occur every time it is attached and detached. People with experience playing wind instruments know how much physical strength they need to play large wind instruments. In this regard, in the proposed acoustic box, the mobile phone and the horn can be connected simply by placing the mobile phone on the stand, but it can be said that instability of the connection is inevitable.

  When using a large horn device, the problem that portability is impaired can also be pointed out. The large horn device requires a fixed place, and the advantage of easily carrying music with a mobile phone is lost. In this regard, the mobile phone acoustic box illustrated in Patent Document 1 is large and seems difficult to carry.

  After all, applying a large horn device to a mobile phone has too many instability factors in actual use, and it is commensurate with the driving force and playback sound band of the speaker unit built into the mobile phone. It is appropriate to use a horn device of an appropriate size.

  In fact, when a light horn load is loaded with a small horn device that matches the driving force and playback bandwidth of the speaker built in the mobile phone, extremely stable and neat playback sound can be obtained. However, it is not possible to wipe out the peculiar and small timbre of a mobile phone, and it is possible to reach the intended purpose of making it possible to enjoy music from an appropriately distant listening position on the mobile phone. Can not. In this regard, the proposal described in Patent Document 1 gives a plurality of horn loads having different horn load characteristics to the sound of one mobile phone, and finally gathers the openings of the plurality of horns in front to produce a loud sound. Although it is said that the reproduction sound can have an audible spread by mixing it, it has a very complicated internal structure, and even if it is commercialized as a woodwork product, the number of parts is excessive, and by resin molding Even if it is commercialized, it seems that integral molding is difficult because of the mold release. These problems must be directly linked to cost problems.

  As a result of the above investigation, if the timbre unique to a small cellular phone can be wiped away, a small horn device that operates stably in accordance with the driving force and reproduction band of the speaker built in the cellular phone can be used. It is shown that music can be enjoyed for a while within a predetermined listening range using as a sound source.

  Therefore, the present invention has an extremely large influence on the acoustic effect on the listener regardless of whether it is an actual musical instrument performance or reproduced music, that is, the physical environment in which the musical instrument performance or music is reproduced, that is, the acoustic characteristics of the room. Focusing on the fact that today's residential environment has acoustically extremely live characteristics, and adopting a configuration that makes it possible to make maximum use of room indirect sound even though it is a small horn device Accordingly, it is an object of the present invention to provide a horn device for a mobile phone that realizes a rich sound field feeling by wiping away the timbre unique to a mobile phone that is small in size.

  In order to achieve the above object, the present invention adopts the following configuration.

(Solution 1)
A horn device for a mobile phone according to the present invention includes a loading slot that forms a sound source chamber by being inserted so as to insert one end of the mobile phone on the speaker built-in side, and the formed sound source chamber is a common sound source chamber. A first horn and a second horn. In this case, the first horn and the second horn are formed so as to open in opposite directions across the sound source chamber, and the first horn and the second horn are added to the sound of the mobile phone loaded in the loading slot. The horn load is simultaneously loaded by both the horn and a loud sound is radiated in two opposite directions. The loud sound from one of the horns is directly directed to the listener, and the loud sound from the other horn is It can be used as an indirect sound.

  The solving means 1 will be described. A horn device for a mobile phone includes a slot for loading a mobile phone, a first horn, and a second horn. The slot can be loaded so that one end portion on the side of the built-in speaker of the mobile phone is inserted. In other words, the slot has a function of holding the mobile phone at a pitch in a certain posture, and ensures the stability of the connection between the mobile phone and the horn device.

In addition, the slot can form a sound source chamber shared by the first horn and the second horn when a mobile phone is loaded. That is, the cellular phone is used as a member that closes the opening of the slot to form a sound source chamber. Here, the sound source room is a space where the sound from the built-in speaker of the mobile phone subject to horn loading is first radiated, and the sound radiated to the sound source room includes the first horn and the second horn. The horn load is simultaneously loaded by both horns.

At this time, the first horn and the second horn that load the horn load on the sound from the mobile phone are formed so as to open in opposite directions with the sound source chamber interposed therebetween. As a result, when one of the horns is directed to the listener, the other horn is necessarily in a posture of turning the back toward the listener. Therefore, the loud sound emitted from the horn facing the listener functions as a direct sound component to the listener, and the loud sound emitted from the opposite horn is indirect according to the acoustic characteristics of the listening environment. It can function as a sound component. The intended rich indirect sound component creates a rich sound field that cannot be obtained only by a horn intended for listeners, and can correct acoustic characteristics of a small scale with a peaky that is common in mobile phones.

  The direction in which the horn device of the present invention is used belongs to the free handling of individual listeners as a matter of course, but direct sound components and indirect sound components are separately radiated as described above. The present invention has a significance in being configured to be able to.

(Solution 2)
The horn device for a mobile phone of the present invention is based on the horn device described in Solution 1, and the first horn and the second horn are both an upper and lower sound path wall surface and left and right sound path wall surfaces. The upper and lower sound path wall surfaces and the left and right sound path wall surfaces are continuously formed from the first horn to the second horn. It is characterized by being.

  The solving means 2 will be described. The above solution means an advantageous configuration capable of suppressing the number of parts when the horn device of the present invention is realized as a specific product.

  As a means for this purpose, the upper and lower sound path wall surfaces and the left and right sound path wall surfaces are not formed independently of the first and second horns, but the first and second sound path wall surfaces. To the second horn. Thereby, when the 1st horn, the sound path wall surface, and the sound path wall surface of the 2nd horn are formed separately, the place which requires 8 curved surfaces can be formed substantially by 4 curved surfaces.

(Solution 3)
The mobile phone horn device of the present invention is based on the horn device described in Solution 2 above, and the left and right sound path wall surfaces are extended below the sound path wall surfaces below the upper and lower sound path wall surfaces. It also serves as a stand for placing the first horn and the second horn in a predetermined posture.

  The solving means 3 will be described. The above solution means an advantageous configuration that can further reduce the number of components when the horn device of the present invention is realized as a specific product.

The horn device is used while maintaining a specific posture, and requires some member for maintaining the posture. Therefore, the left and right sound path wall surfaces of the first horn and the second horn are extended below the sound path wall surfaces on the lower side of the upper and lower sound path walls, so that the extended portion is used as a stand for deferring the horn device. Can be used. Thereby, an independent stand member can be omitted.

(Solution 4)
A horn device for a mobile phone according to the present invention is based on the horn device described in Solution 1, and either one or both of the first horn and the second horn are connected to the upper sound path wall surface and the left and right horn devices. It is formed as an incomplete square horn with a three-curved surface structure with the sound path wall surface, and functions as a complete square horn using the plane as a lower sound path wall surface when placed on an arbitrary plane. And

  The solving means 4 will be described. The above-mentioned solution means an advantageous configuration for further reducing the number of parts when implementing the horn device of the present invention as a specific product, that is, reducing the cost and enhancing the market competitiveness.

  There is a reality that products for distribution in the market require a product price corresponding to the use and function of the product. Products that ignore this reality lack technical competitiveness and cannot contribute to industrial development even if they are technically established. A square horn is generally composed of four sound path walls on the top, bottom, left and right. The horn is characterized in that the cross-sectional area increases non-linearly from the throat part toward the opening, but such a form is realized even if one surface of the sound path wall surface is a plane. be able to. Therefore, the horn was designed with the lower sound path wall as a flat surface, and the lower sound path wall surface was omitted as a product, and this product was used as a table when placed on a flat surface such as a table or desk. By making the plane usable as the lower sound path wall surface, significant cost reduction can be achieved from the mold stage on molding.

(Solution 5)
The mobile phone horn device according to the present invention is based on the horn device according to any one of Solution 1 to Solution 4, and the first horn and the second horn have different horn load characteristics. It is characterized by being formed.

  The solving means 5 will be described. The above solution can expand the usage of the horn device for mobile phones of the present invention and can be widely adapted to the listener's preference, the music genre to be played, and the acoustic environment of the place where the music is played. The structure to be made is shown.

  If the horn load characteristics of the first horn and the second horn formed in opposite directions are the same, for example, even if a horn device for a mobile phone is used by inverting the front and rear, The overall acoustic characteristics composed of the indirect sound component do not change, and are merely the same usage. However, when the horn load characteristics of the first horn and the second horn are different, the direct sound component and the indirect sound component with respect to the listener can be changed by using the horn device by inverting the horn device. it can. As a result, it is possible to optimize the ratio of the direct sound and the indirect sound according to the acoustic characteristics of the reproduction environment and the music genre to be reproduced, or to apply the aspect of application such as changing the sound.

  The horn device for a mobile phone according to the present invention includes a first horn and a second horn that share a sound source chamber formed by loading the mobile phone in a loading slot, thereby reducing the sound of the mobile phone. A horn load can be simultaneously loaded by the basic horn, and a known horn effect such as expansion of acoustic power or improvement of excessive characteristics can be imparted to the sound of the mobile phone. The first horn and the second horn are formed in opposite directions with the sound source chamber interposed therebetween. Therefore, when one of the horns is pointed at the listener, the other horn is not necessarily directed toward the listener, and the listener does not hear the direct sound radiated from the horn toward him. A loud sound radiated from a horn not facing toward the user can enjoy a rich sound field due to indirect sound components reaching the listener by reflection, diffraction, etc. according to the acoustic characteristics of the listening environment. As a result, it is possible to almost completely wipe out the small acoustic characteristics with the peeky peculiar to the mobile phone while suppressing the size of the horn device to a small size suitable for the driving force and reproduction band of the speaker built in the mobile phone. Since the horn device can be kept small, the user can also carry the horn device together with the mobile phone and enjoy a secondary effect of easily enjoying music anytime and anywhere.

It is a perspective view which shows embodiment of the horn apparatus for cellular phones of this invention. It is a front view of the horn apparatus in the said embodiment. It is a XX arrow cross-sectional view of FIG. FIG. 2 is a longitudinal sectional view taken along line YY in FIG. 1. It is operation | movement explanatory drawing of the horn apparatus in the said embodiment. It is a longitudinal cross-sectional view which shows other embodiment of the horn apparatus for portable telephones of this invention. It is a longitudinal cross-sectional view which shows other embodiment of the horn apparatus for portable telephones of this invention.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a mobile phone horn device according to the present invention will be described below with reference to the drawings as an integrally molded product made of resin by injection molding. However, the horn device of the present invention is not limited to resin, and can be implemented as a wood product, a glass product, or a ceramic product.

  The resin material used is arbitrary, but it is preferable to use a hard resin material having a large specific gravity from the acoustic point of view of the horn. Examples of preferable resin materials include ABS resin, acrylic resin, PET resin, and mixed resins thereof. In the horn device of the present embodiment, acrylic resin is employed as the resin material. When an acrylic resin is used, a high-class feeling can be expressed by using a design that takes advantage of the deep transparency of the material as non-colored or translucent coloring.

  In addition, in the case of a resin product by injection molding, it is not necessarily required to be an integrally molded product, but by using an integrally molded product, complicated problems such as the accuracy of butting multiple parts and assembly accuracy are not possible. This can be avoided and the number of assembly steps can be omitted.

  The overall shape of the horn device 30 of the present invention integrally molded from a transparent acrylic resin is such that the first horn H1 and the second horn H2 that are distinguished for convenience are connected in a back-to-back posture, and the mobile phone 50 is connected to the connection portion. This is a shape in which a loading slot 3S for loading is placed (FIG. 1).

  The first horn H1 and the second horn H2 are formed as square horns having a square cross section of the sound path surrounded by the upper and lower sound path wall surfaces 31, 31 and the left and right sound path wall surfaces 32, 32. ing. Accordingly, in order to form the first horn H1 and the second horn H2, normally eight surfaces are required, but the first horn H1 and the second horn H2 are substantially four curved surfaces. It is characteristic that it is composed of

That is, the upper sound path wall surface 31 of the upper and lower sound path wall surfaces 31 and 31 is a curved surface obtained by bending a single plate into a downward convex surface, and the lower sound path wall surface 31 has a single plate facing upward. It is a curved surface bent like a convex surface. The upper and lower sound path wall surfaces 31, 31 are combined so that the distance between them is the narrowest at the position of the loading slot 3S (FIGS. 1 and 4).

On the other hand, the left and right sound path wall surfaces 32, 32 each have a shape in which one plate is bent into a curved surface convex inward, and the left and right sound path wall surfaces are also spaced apart from each other at the position of the loading slot 3S. They are combined so as to be the narrowest (FIGS. 1 and 4). And, by such a combination of the four sound path wall surfaces 31, 31, 32, 32, the first horn H1 and the second horn H2 that open in opposite directions are very rationally formed. It is.

  However, the first horn H1 and the second horn H2 are formed to have different horn load characteristics. As is apparent from the horn device 30 in a front view and a cross-sectional view (FIGS. 2 and 3), the horn device 30 of the present embodiment is close to a radial horn, but the first horn H1 is a relative horn device. The sound path is long and the cut-off frequency is set low. On the other hand, the second horn H2 is a short horn with a high cutoff frequency. There is a difference that the long horn efficiently spreads the sound up to the low sound range, and the short horn efficiently raises the sound in the middle and high sound range.

  Note that the upper and lower sound path wall surfaces 31 and 31 and the left and right sound path wall surfaces 32 and 32 of the first horn H1 and the second horn H2 are cut and aligned in the vertical and horizontal directions of the sound path, respectively. Designed in such a form, the horn device 30 has a neat appearance in a rectangular form (FIG. 2), a planar form (FIG. 3), and a side face form (FIG. 4). Further, the left and right sound path wall surfaces 32, 32 extended below the lower sound path wall surface 31 are used as a stand 3 </ b> D of the horn device 30.

  The loading slot 3 </ b> S of the horn device 30 in the present embodiment is formed assuming a cellular phone 50 that has a function as a portable music player and emits sound from a built-in speaker from the lower part of the main body 51. Yes. This is because the mobile phone 50 of this type is highly fashionable and the specific model mobile phone 50 becomes a de facto standard in a short period of time, so it is sufficient to assume a specific model with a high market share.

  The loading slot 3 </ b> S is provided 32 and 32 horizontally between the sound path wall surfaces 32 and 32, which are extended above the sound path wall surface 31 on the upper side, and a distance corresponding to the thickness of the mobile phone 50. It is formed by a pair of front and rear support plates 33, 33 (FIG. 1). The distance between the left and right sound path wall surfaces 32, 32 at this position is set in accordance with the width of the mobile phone 50. By loading the mobile phone 50 into the loading slot 3S, the opening of the loading slot 3S is closed. It is set so that the sound source room R1 is formed (FIG. 4). The formed sound source chamber R1 is shared by the first horn H1 and the second horn H2. A pair of stopper ribs 34 are arranged in the loading slot 3S so that the lower end portion of the loaded mobile phone 50 can be received and positioned.

  The support plate 33 on the second horn H2 side of the loading slot 3S reaches the lower sound path wall 31 so as to block the sound path between the first horn H1 and the second horn H2. A sound hole 3H for injecting sound pressure into the second horn H2 is formed. The sound hole H is in charge of sound pressure distribution to the first horn H1 and the second horn H2. In addition, a part of the sound hole 3H immediately below the loading slot 3S is provided with a small-sized through hole in the lower sound path wall surface 31 so as to be connected to the sound hole 3H. Can be inserted.

  The sound of the mobile phone 50 is primarily radiated to the sound source room R1, and is simultaneously injected into the first horn H1 and the second horn H2 as sound pressure (FIG. 4). The injected sound pressures are different from each other in the horn load characteristics of the first horn H1 and the second horn H2, so that the first horn H1 and the second horn H2 are the loud sounds P1 and P2 having different acoustic characteristics. Is emitted in the opposite direction.

  Therefore, for example, when the horn device 30 is placed on the desk surface T1 placed in the corner portion of the room and the first horn H1 is used in the illustrated posture toward the listener (FIG. 5), Then, the loud sound P1 from the first horn H1 arrives as a direct sound, and abundant reflected sound components from the surrounding wall or furniture of the loud sound P2 radiated from the second horn H2 with a lot of medium and high sound components. Therefore, listeners can enjoy realistic music cultivated by indirect sound components.

  In most cases, it is considered that the horn device 30 for a mobile phone of the present invention is used by being placed on an arbitrary plane T2 such as a desk surface T1. Therefore, an embodiment capable of simplifying the overall configuration by assuming such a usage mode will be described (FIGS. 6 and 7).

  When the horn device 30 is installed on the plane T2, one of the first horn H1 and the second horn H2, for example, the sound path wall 31 on the lower side of the second horn H2 can be omitted. (FIG. 6). The sound pressure that has passed from the sound source chamber R1 to the second horn H2 side through the sound hole 3H is restrained by the upper sound path wall surface 31, the left and right sound path wall surfaces 32, 32, and the plane T2, and the first horn H1. Radiated to the other side of

In the case of the form shown in the figure, the first horn H1 functions as a complete horn, but the second horn H2 does not function as a complete horn. However, in the case where the second horn H2 is used exclusively in a mode of emitting indirect sound components, it is not necessary to function correctly as a horn. In other words, the purpose can be achieved if some sound is emitted. It can be done.

  When the horn device 30 is placed on the plane T2, both the first horn H1 and the second horn H2 are removed with the lower sound path wall surface 31 of both the first horn H1 and the second horn H2 omitted. It can function as a complete horn (FIG. 7).

  In the case of the portable shown in the figure, the first horn H1 and the second horn H2 are both surrounded by three curved surfaces of the left and right sound path wall surfaces 32, 32 and the upper sound path wall surface 31, and are released downward. Is an incomplete horn. However, such a horn device 30 can function as a complete horn having a four-surface configuration in use because the lower opening is closed by being placed on an arbitrary plane T2.

  In the horn device 30 of this embodiment, the upper sound path wall 31 of the first horn H1 and the second horn H2 is assumed to be a horn when the lower sound path wall 31 is assumed to be a plane. It is formed as a curved surface that can ensure the necessary cross-sectional area increase rate of the sound path.

  The above description of the embodiment of the horn device 30 of the present invention describes the case where the first horn H1 and the second horn H2 are square horns, but the first horn H1 and the second horn H2 are the two. As long as the condition that the horn H2 opens in the opposite direction is satisfied, the formal shape of the horn is not limited to a square shape, and may be a circular horn or an elliptical horn, and further, the horn shape. However, for example, it may change from a circular horn to a square shape on the way.

H1 first horn H2 second horn P1 first horn loud sound P2 second horn loud sound 30 horn device
R1 sound source room 3S loading slot 31 upper and lower sound path wall surfaces 32 left and right sound path wall surfaces 3D stand T2 arbitrary plane 50 mobile phone

Claims (5)

A loading slot for forming a sound source chamber by loading one end of the built-in speaker side of the mobile phone so as to be inserted; a first horn and a second horn having the formed sound source chamber as a common sound source chamber; With
The first horn and the second horn are formed so as to open in opposite directions across the sound source chamber, and the first horn and the second horn are added to the voice of the mobile phone loaded in the loading slot. Simultaneously load the horn load by both and radiate loud sound in two opposite directions, direct the loud sound from either horn toward the listener, and indirectly the loud sound from the other horn A horn device for a mobile phone, characterized in that it can be used as a sound. The first horn and the second horn are both formed as a square horn having a four-curved surface structure surrounded by upper and lower sound path wall surfaces and left and right sound path wall surfaces,
2. The cellular phone according to claim 1, wherein the upper and lower sound path wall surfaces and the left and right sound path wall surfaces are continuously formed from the first horn to the second horn. Horn device.   The left and right sound path wall surfaces extend below the sound path wall surfaces below the upper and lower sound path wall surfaces, and also serve as a stand for placing the first horn and the second horn in a predetermined posture. The horn device for a mobile phone according to claim 2.   Either one or both of the first horn and the second horn is formed as an incomplete square horn having a three-curved surface configuration of the upper sound path wall surface and the left and right sound path wall surfaces, on an arbitrary plane. 2. The horn device for a mobile phone according to claim 1, wherein the horn device functions as a complete square horn using the flat surface as a lower sound path wall surface. The horn device for a mobile phone according to any one of claims 1 to 4, wherein the first horn and the second horn are formed so as to have different horn load characteristics. .

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