KR20070023543A - Potable communication tool - Google Patents

Abstract

A speaker for emitting sound, a plurality of sound emitting holes 15, 16, and 17 formed in the rear cabinet 45, a mesh sheet 53, a double-sided tape 52, and a transparent sheet 51 are disposed. do. The sound emission holes 15, 16, 17, the mesh sheet 53, the double-sided tape 52, and the transparent sheet 51 control the direction of sound emission from the speaker.

Speaker, Cabinet, Sound Emission Hole, Mesh Sheet, Double-Sided Tape, Transparent Sheet, Positioning Protrusion, Positioning Hole

Description

Mobile communication device {POTABLE COMMUNICATION TOOL}

1 is a perspective view of a mobile phone according to an embodiment of the present invention when viewed in a right direction;

2 is a perspective view of the cellular phone folded in the right direction;

3 is an exploded view of a first casing of the cellular phone and its interior;

4 is a plan view of the sound emitting hole of the cabinet on the rear side of the first casing and its surroundings seen from the rear side thereof;

Fig. 5 is a plan view showing a state in which a mesh sheet, a double-sided tape, and a transparent sheet of a cellular phone are bonded to a cabinet on the back side of the first casing.

Figure 6 is a plan view of the assembled state of the mesh sheet, double-sided tape, transparent sheet of the mobile phone from the surface side.

7 is a plan view showing a transparent sheet of a mobile phone.

8 is a plan view showing a double-sided tape of a mobile telephone.

9 is a plan view showing a mesh sheet of a mobile telephone;

Fig. 10 is a plan view showing the arrangement of through holes in acoustic characteristic test case A;

Fig. 11 is a plan view showing the arrangement of through holes in acoustic characteristic test case B;

12 is a plan view showing a through hole arrangement in an acoustic characteristic test case C;

13 is a graph showing the acoustic characteristics of a speaker.

<Explanation of symbols for the main parts of the drawings>

1: mobile phone

15: first sound emission hole (through hole, sound emission control means)

16: second sound emission hole (non-penetrating hole, sound emission control means)

17: third sound emitting hole (sound blocking hole, sound emission control means)

18: positioning projection

41: Sound leakage prevention cushion (sound leakage prevention means, rubber cushion)

43: speaker

43a: Speaker side cushion (sound leak prevention means)

45: back side cabinet

51: transparent sheet (sound emission control means)

51a: transparent sheet side opening

51b, 52b: Positioning hole

52: double-sided tape (sound emission control means)

52a: double sided tape side opening

53: mesh sheet (sound emission control means)

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a mobile communication device such as a mobile phone or a PHS, and more particularly, to a sound emission hole structure for emitting sound of a speaker.

In recent years, portable communication devices have been miniaturized like mobile phones and PHSs (simple portable telephone systems), and various functions such as TVs and TV phones have been installed. Therefore, a speaker separate from the receiver is required for mounting thereon. Sound from the speaker is emitted by forming a plurality of sound emission holes in the cabinet at the front of the speaker. As such a mobile communication device, there are JP-A-9-215076 and JP-A-2002-152871, for example.

In Japanese Patent Application Laid-Open No. 9-215076, a speaker is disposed on the back of the cabinet, a through hole and a dummy hole are formed on the front of the speaker, and the dummy hole has a diameter of 3 mm or less and a depth of 0.5 mm or more, or more. The bottom shape of a micropore was made into the shape of a cone, a ladder, and a hemispherical shape, and the method of making diffuse reflection of the straight light which entered into the dummy hole is not reflected in a straight line. In this way, it is difficult to distinguish between the through hole and the dummy hole in appearance, and the design is improved.

In Japanese Patent Application Laid-Open No. 2002-152871, a dummy hole includes a first recess formed on the front surface of the transparent resin panel, and a second recess formed on the rear surface of the transparent resin panel and facing the first recess. The part which contacts at least a 2nd recessed part is colored in the same color as the diaphragm of the speaker mounted in the said cabinet. This eliminates the unnaturalness of the difference in appearance between the sound emitting hole and the dummy hole for the speaker, and is excellent in design, and it is equipped with a transparent resin panel that is easy to mold, maintains the conventional strength, and has low maintenance cost of the mold. I had to get a cabinet.

By the way, with respect to the sound emitted from the sound emission hole formed in the cabinet by one speaker, it is known that the sound quality emitted varies depending on the position of the sound emission hole.

However, the product can not neglect the design aspect, there is a problem that the sound quality and design does not necessarily match.

This invention is made | formed in view of such a point, Comprising: It aims at providing the sound emission hole advantageous to both in consideration of a design surface and sound quality.

In a first aspect of the present invention, a portable communication device includes a cabinet, a speaker for emitting sound, and sound emission control means for controlling a sound emission direction from the speaker, wherein the sound emission control means includes: And a plurality of sound emission holes, a mesh sheet, a double-sided tape, and a transparent sheet formed in the cabinet.

According to the said structure, the control of the sound emission direction from a speaker is performed without the cost in the simple structure which is easy to assemble. By controlling the direction of sound emission from the speaker in this way, the degree of freedom of sound quality change is increased.

In the second aspect of the present invention, the sound emitting hole comprises a plurality of through holes penetrating the cabinet and non-penetrating holes in which the surface is recessed without penetrating the cabinet. do.

According to the said structure, since a non-penetrating hole does not penetrate a cabinet and the surface side is recessed, the difference in a visual difference with a through hole becomes small, and a design improves.

In the third aspect of the present invention, a part of the through hole penetrating the cabinet is covered with a transparent sheet to form a sound blocking hole that does not pass sound.

According to the above configuration, the sound blocking hole is covered with a transparent sheet so as not to pass sound. However, the sound blocking hole is coated with a transparent member, so that the appearance is the same as that of the through hole, and the design is improved.

In the fourth invention, the non-penetrating hole and the sound blocking hole are disposed in the central portion of the region where the sound emitting hole is disposed.

According to the said structure, the non-penetrating hole which does not let a sound pass, and a sound blocking hole is arrange | positioned in the position enclosed by the through-hole which passes a sound.

In the fifth aspect of the invention, the speaker is disposed in the center of the region where the sound emission holes are disposed.

According to the above arrangement, the sound of the speaker is emitted from the through hole via the non-penetrating hole and the sound blocking hole.

In the sixth invention, the sound emission holes are excreted symmetrically.

According to the above configuration, since the symmetrical sound can be emitted from one speaker, it is not necessary to provide a plurality of speakers.

In a seventh aspect of the present invention, the mesh sheet, the double-sided tape, and the transparent sheet are bonded at an inner surface of the cabinet, and the mesh sheet covers at least all the through holes, and the double-sided tape surrounds at least all of the through holes. It has a tape side opening, and the said transparent sheet is comprised so that it may have a transparent sheet side opening surrounding only the through-hole except the said sound isolation hole.

According to the above configuration, sound quality control is more easily performed with a simple configuration without changing the design surface.

In the eighth aspect of the present invention, the double-sided tape has a plurality of double-sided tape side positioning holes, and the transparent sheet has a transparent sheet side positioning hole at a position corresponding to the double-sided tape side positioning holes. In the cabinet, positioning projections are formed so as to correspond to the respective positioning holes.

According to the said structure, positioning of a double-sided tape and a transparent sheet becomes easy, and workability can be improved.

In a ninth aspect of the invention, sound leakage preventing means for preventing sound leakage from the speaker is provided.

According to the above configuration, unpleasant sound leakage from the speaker is prevented by the sound leakage preventing means.

In the tenth aspect of the present invention, the sound leakage preventing means is formed by bringing the speaker side cushion formed in the speaker into close contact with the rubber cushion disposed in the cabinet.

According to the above configuration, sound leakage from the speaker is reliably prevented by a simple and easy assembly.

In the eleventh invention, the mobile communication device is a mobile phone.

According to the above configuration, a mobile telephone having a good sound quality and a good design can be obtained.

The above and other objects and features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.

(Example)

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a perspective view of the mobile phone 1 serving as the mobile communication device according to the embodiment of the present invention, in an extended direction. FIG. 2 is a perspective view in the right direction illustrating the folded state of FIG. 1. FIG.

As shown in FIG. 1 and FIG. 2, the mobile telephone 1 of the present embodiment has a first casing 2 and a second casing 3, which are freely opened and closed by the hinge portion 5.

On the front side (inner side) of the first casing 2, a liquid crystal display unit 4 and a receiver 6 are formed, and on the rear side (outer side), an audio rewind button 11 and a stop / play button 12 are provided. , A fast forward button 13, a menu button 14, a sub display unit 10 for checking an incoming call, displaying a menu, or displaying a clock when not in use.

On the surface side of the second casing 3, a transmitter 7, an information input button 8, and a function button 9 are formed on the back side, although not shown, and a camera unit and a battery cover, respectively.

In the case of telephone and mail communication, the first casing 2 and the second casing 3 are opened, and the first casing 2 and the second casing are used to confirm an incoming call or to listen to music. The casing 3 is configured to be executable in the folded state.

As disassembled and shown in FIG. 3, the first casing 2 includes a front side cabinet 30 and a rear side cabinet 45. The first to third sound emission holes 15, 16, and 17 are formed in the rear cabinet 45. As enlarged in FIG. 4, the 2nd sound emission hole 16 (3 in this embodiment) arrange | positioned in the center is a non-penetrating hole which only recessed the surface side without penetrating the back side cabinet 45. As shown to FIG. It is composed. The first sound emission hole 15 and the third sound emission hole 17 penetrating the rear side cabinet 45 are disposed symmetrically with respect to the second sound emission hole 16. In this way, the second sound emitting hole 16 is formed of a non-perforated hole in which only the surface side is recessed, so that the second sound emitting hole 16 is external to the first sound emitting hole 15 and the third sound emitting hole 17. The difference is small, and the design can be improved.

A speaker mounting portion 46 is formed in the surface side cabinet 30, and a speaker 43 is disposed in the speaker mounting portion 46. A rubber sound leakage preventing cushion 41 is coated on the speaker 43 as sound leakage preventing means. The sound leakage preventing cushion 41 is formed with a speaker window 42 in the center. The speaker side cushion 43a serving as a ring-shaped sound leakage preventing means is also adhered to the surface of the speaker 43. The first casing 2 is assembled with the magnesium frame 44 interposed between the front side cabinet 30 and the rear side cabinet 45. In this case, the sound leakage preventing cushion 41 and the speaker side cushion 43a are brought into close contact so as to prevent sound leakage from the speaker 43. With such a simple and easy assembly, leakage of sound from the speaker 43 in an unintended direction is reliably prevented.

In this manner, the speaker 43 is disposed inside the first to third sound emission holes 15, 16, and 17. As a result, the sound of the speaker 43 is emitted while the cellular phone 1 is folded. The speaker 43 is configured to emit a sound recorded on the main body, a sound recorded on an SD card, a sound when receiving a TV, and the like.

As shown in FIG. 5, the transparent sheet 51, the double-sided tape 52, and the mesh sheet 53 are bonded to the rear surface side (core side) of the rear cabinet 45. As shown in Fig. 6, the transparent sheet 51, the double-sided tape 52, and the mesh sheet 53 have a transparent sheet 51 and a mesh sheet 53 different from each other on the double-sided tape 52. Each is assembled in the attached state.

As shown in Fig. 7, the transparent sheet 51 has a rectangular shape, and has a pair of transparent sheet side openings 51a having a ladder shape with rounded corners, and a pair of round positioning holes 51b. do.

As shown in FIG. 8, the double-sided tape 52 is a slightly smaller double-sided tape than the transparent sheet 51, and is positioned at a position corresponding to the transparent sheet side opening 51a than the transparent sheet side opening 51a. A pair of wide double-sided tape side openings 52a are formed inwardly. In addition, the positioning holes 52b are formed at the same position as the positioning holes 51b of the transparent sheet 51.

As shown in FIG. 9, the mesh sheet 53 is slightly larger than the double-sided tape side opening 52a, and is comprised of a mesh material.

As shown in FIG. 5, these are attached to the positioning holes 51b and 52b by the pair of positioning projections 18 formed in the back cabinet 45 in the assembled state. Thereby, positioning of the double-sided tape 52 and the transparent sheet 51 becomes easy, and workability can be improved.

With this configuration, the first sound emission holes 15 disposed on both the left and right sides are covered with only the mesh sheet 53 and are configured as through holes for passing sound. The third sound emission hole 17 inside the first sound emission hole 15 is covered with a mesh sheet 53 and a transparent sheet 51, and is a sound blocking hole that appears as a through hole but does not pass sound. This improves the design of the third sound emitting hole 17 in appearance as with the first sound emitting hole 15. The second sound emitting hole 16 located at the center is configured not to pass sound into the non-penetrating hole.

As described above, the second sound emitting holes 16 are non-penetrating holes and the number is three. In the present embodiment, the first sound emitting holes 15 are through holes, and the number of the first sound emitting holes 15 is a total of ten pieces, five each from side to side. The third sound emitting holes 17 are sound blocking holes, and the number thereof is four in total, two each to the left and right. In this way, the first to third sound emission holes 15, 16, and 17 are disposed symmetrically. The speaker 43 is disposed so that its center is directly under the second sound emission hole 16. As a result, the sound of the speaker 43 is emitted from the first sound emitting hole 15 via the second sound emitting hole 16 and the third sound emitting hole 17, and is symmetrical from one speaker 43. Since the sound can be emitted, it is not necessary to provide a plurality of speakers 43. In addition, the sound quality is easily controlled with a simple configuration without changing the design surface.

The first to third sound emission holes 15, 16, and 17, the transparent sheet 51, the double-sided tape 52, and the mesh sheet 53 control sound emission directions from the speaker 43. Configure the control means.

Effect of Example

As described above, according to the present embodiment, control of the sound emission direction from the speaker 43 is performed without incurring cost in an easy and simple configuration. By controlling the direction of sound emission from the speaker 43 in this way, the degree of freedom of sound quality change is increased. Moreover, even if the sound quality is changed freely, the mobile phone 1 having a good sound quality and a good design can be obtained because it does not involve a change in the design surface.

Sound Characteristics Test

The first to third sound emission holes 15, 16, and 17 described above are arranged in an optimal number according to the acoustic characteristic test results.

That is, in terms of design, it is preferable to use all of the first to third sound emitting holes 15, 16, and 17 as the through holes as a whole, which has a unified aesthetic. I knew that it became annoying sound that grew.

Therefore, in order to eliminate the unpleasant sound, the following three kinds of acoustic characteristic tests were conducted.

Case A All of the first to third sound emitting holes 15, 16, and 17 are formed as through holes for passing sound through the rear cabinet 45 (shown in FIG. 10).

Example B The first sound emitting hole 15 and the third sound emitting hole 17 are the through holes through which the sound passes through the rear side cabinet 45, and the second sound emitting hole 16 is the rear side. A non-penetrating hole that does not penetrate the cabinet 45 and does not pass sound is shown (shown in FIG. 11).

Example C The first sound emitting hole 15 is a through hole for passing the sound passing through the rear cabinet 45, and the second sound emitting hole 16 and the third sound emitting hole 17 are the rear cabinet. A non-penetrating hole that does not penetrate 45 and does not allow sound to pass through (shown in FIG. 12).

The results of these three types of acoustic characteristic tests are shown in FIG.

In case A data, there is a peak of sound pressure in the 8500Hz part.

In case B data, there is a peak of sound pressure at 7700 Hz.

The data in case C has a peak of sound pressure at 6900 Hz.

From these results, it can be seen that, among the three types of acoustic characteristic tests, the unpleasant sound is the least when conducted in the case C.

However, in terms of design, seven non-penetrating holes exist, which makes the appearance poor. In other words, it was found that if the sound characteristic test result was good, the designability was inferior, and if the design quality was good, the result was the opposite result.

Therefore, in the present invention, a peak at 6900 Hz is assumed, and the third sound emission hole 17 covers the through hole penetrating the rear cabinet 45 with the transparent sheet 51 and the mesh sheet 53. In terms of design, a non-penetrating hole is seen as only the second sound emitting holes 16 (three).

As a result, only the second sound emitting holes 16 are non-through holes in design, and the first and third sound emitting holes 15 and 17 are seen as through holes. In terms of the acoustic characteristics test, only the sound comes out from the opening 51a on the transparent sheet side, so that it is possible to have a peak at 6900 Hz of case C in the acoustic characteristics test.

Other embodiments

This invention may be set as the following structures with respect to the said Example.

That is, in the above embodiment, the number and positions of the sound emission holes 15, 16, and 17 are determined from the acoustic characteristic test results, but the arrangement and number are not limited thereto. That is, when changing the size or the total number of sound emitting holes, the same number and position can be found by performing the same acoustic characteristic test as in the above embodiment.

The above embodiments are essentially preferred examples and are not intended to limit the scope of the present invention, its applications and uses.

As described above, according to the present invention, even if the sound quality is changed freely, it does not involve a change in design surface, so that a mobile communication device having a good sound quality and a good design can be obtained.

Claims (11)

Cabinet 45, In a portable communication device comprising a speaker 43 for emitting sound and sound emission control means 15, 16, 17, 51, 52, 53 for controlling the sound emission direction from the speaker 43, The sound emission control means is composed of a plurality of sound emission holes 15, 16, 17 formed in the cabinet, the mesh sheet 53, the double-sided tape 52, and the transparent sheet 51 Mobile communication device. The sound emission holes 15, 16, and 17 of claim 1, wherein a plurality of through holes 15 and 17 penetrating the cabinet 45 and a surface thereof are recessed without penetrating the cabinet 45. And a non-penetrating hole (16), wherein the non-penetrating hole (16) is disposed in the center portion of the area where the sound emission holes (15, 16, 17) are disposed. 3. The portable device as claimed in claim 2, wherein a part of the through holes (15, 17) passing through the cabinet (45) is covered with a transparent sheet (51) to be a sound blocking hole (17) which does not pass sound. Communication equipment. The portable communication device according to claim 3, wherein the non-penetrating hole (16) and the sound blocking hole (17) are disposed in the center portion of the area where the sound emitting holes (15, 16, 17) are disposed. 5. A portable communication device according to claim 4, wherein the speaker (43) is disposed in the center portion of the area where the sound emission holes (15, 16, 17) are disposed. The mobile communication device according to claim 5, wherein the sound emitting holes (15, 16, 17) are symmetrically disposed. The method of claim 5, wherein the mesh sheet 53, the double-sided tape 52 and the transparent sheet 51 is bonded to the inner surface of the cabinet 45, The mesh sheet 53 covers at least all of the through holes 15, The double-sided tape 52 has a double-sided tape side opening 52a surrounding at least all of the through holes 15, The transparent sheet (51) is characterized in that it is configured to have a transparent sheet side opening (51a) surrounding only the through hole (15) except the sound blocking hole (17). 6. The double-sided tape 52 has a plurality of double-sided tape side positioning holes 52b. The transparent sheet 51 has a transparent sheet side positioning hole 51b at a position corresponding to the double-sided tape side positioning hole 52b, The cabinet (45) is characterized in that a positioning projection (18) is formed to correspond to each of the positioning holes (51b, 52b). 9. A portable communication device according to any one of claims 1 to 8, comprising sound leakage preventing means (41, 43a) for preventing sound leakage from said speaker (43). The portable communication apparatus according to claim 9, wherein the sound leakage preventing means is formed by bringing the speaker side cushion (43a) formed in the speaker (43) into close contact with the rubber cushion (41) disposed in the cabinet (45). device. The mobile communication device according to claim 5, wherein the mobile communication device is a mobile phone (1).

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