KR100576248B1 - Voice amplifier - Google Patents

Abstract

Provided is a compact and lightweight voice expander without a lead wire or a connector that allows a plurality of people to listen to the sound generated by the earphone at the same time.

Earphones arranged in a position where the space cross-sectional area is gradually sandwiched between the start end portion 4a and the end portion 4a of the vortex-shaped sound path 4 that gradually increases from the start end portion 4a to the end portion 4b. The said subject was solved by the voice expander 1 which has the attachment parts 3 and 3. As shown in FIG. The sound path 4 is formed by the partition plate 14 formed in the vortex shape, and the cover members 12 and 13 which sandwich the partition plate 14 from both sides, and the earphone attachment part 3, 3 Is formed in a concave shape corresponding to the outer surface shape of the earphone to be attached.

Description

Voice Enlarger {VOICE AMPLIFIER}

1 is an exploded explanatory diagram showing an example of the voice expander of the present invention;

2 is a front view of the voice expander of the present invention,

3 is a left side view of the voice enlargement of FIG. 2;

4 is a right side view of the voice expander of FIG.

5 is a cross-sectional view A-A of the voice expander of FIG.

6 is a front view of a main body member constituting the voice expander of the present invention;

7 is a cross-sectional view showing an example of an earphone attaching portion constituting the voice expander of the present invention;

8 is a cross-sectional view showing another example of an earphone attaching part that constitutes the voice expander of the present invention;

Fig. 9 is a sectional view showing the form in the case where the earphone attaching portion constituting the voice expander of the present invention is a sealing portion;

10 is a graph of a function curve in which the X and Y values calculated in Equations 1 and 2 are plotted using the (X, Y) axes;

11 is a perspective view showing an example of an embodiment in which an earphone is attached to the voice expander of the present invention;

12 is a graph showing the relationship between frequency (Hz) and sound pressure (dBSPL).

<Description of Symbols for Main Parts of Drawings>

1: voice expander 2: voice expander body

3, 3 ': earphone attachment part 4: sound path

4a: start end of the sound path 4b: end of the sound path

5 opening 6 mounting hole

7: fitting portion of the mounting hole 8: notch fitting portion

9: sound hole 10: earphone

11 body member 12, 13 cover member

12a, 13a: surface of the cover member 12b, 13b: back surface of the cover member

14: partition plate 15: outer plate

15a, 15b, 15c, 15d: each side of the shell

16: convex fitting portion

17: space portion 18: attachment portion

21, 22: recessed fitting portion

31: flange portion of earphone attachment part

32: inner circumferential surface of earphone attachment part

33: left part of earphone attachment part

34: fitting part of earphone attachment part

35: protrusion

36: recessed fitting portion 37: encapsulation

38: attachment member 41: code

100, 101, 102: function curve 200, 201: sound pressure frequency characteristics

P: the point of view

S: imaginary line passing through the center of the guide

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a compact, lightweight voice expander without a lead wire or a connector, and more particularly, to a compact, lightweight voice expander capable of simultaneously listening to sounds generated from earphones.

Background Art In recent years, playback apparatuses such as a portable CD player, a portable MD player, a portable cassette tape player, and an MP3 using a flash memory are also called a portable audio player or a portable player, and are widely used as portable information recording and reproducing apparatus. In addition, portable devices having a function of receiving music information and voice information, such as radios and modern mobile phones, are also widely used.

The above-mentioned reproducing apparatus or portable apparatus (hereinafter collectively referred to as "reproducing apparatus") is required to be small in size and light weight, and often does not have a speaker function. Therefore, such a reproducing apparatus has an output terminal (also called an earphone terminal) for extracting music information and audio information (hereinafter collectively referred to as "music information"), and the music information includes an earphone system and You can listen by connecting a connector such as a headphone system. In addition, the earphone system, for example, in the case of stereo correspondence, is composed of a pair of left and right earphones, a connector, and a cord for electrically connecting the earphone and the connector. The cord on the earphone side is branched into two branch lines, and each branch line has a predetermined length.

In a normal case, the connector of the earphone system is always plugged into the output terminals of the various playback apparatuses, and the cord is wound around the outer periphery of the playback apparatus or bundled together and placed in a bag or the like. And when I use it, I listen to music information by putting an earphone in the ear and putting it in an ear.

However, sometimes you want to share your music information with your friends. For example, you may want to introduce a friend while listening to a new song, listen to radio news with others, or listen to the contents of a mobile phone with family or friends. In some cases, you may want to listen to your earphones from your ear, in your room or outing.

As a speaker which can be used in such a case, a portable small speaker is known. For example, the speaker described in Patent Document 1 is composed of a speaker body, a connector inserted into an output terminal of a reproduction device, and a cord in which an input signal line and a ground line are integrated. In this case, it is possible to listen to music information from the speaker by carrying such a speaker all the time, and by removing the connector of the earphone system from the reproducing apparatus and plugging the connector of the speaker into the output terminal of the reproducing apparatus.

For example, Patent Document 2 describes a speaker in which a diaphragm with piezoelectric ceramics is attached and a spiral or zigzag guide groove. The speaker is a device in which piezoelectric ceramics deform in accordance with the applied signal voltage, the diaphragm vibrates in accordance with the deformation, and the sound waves generated by the vibration are enlarged in the sound guide groove, and is effective as an interphone installed in the outdoors. Is described. Similarly to the speaker of Patent Document 1, in this speaker, the speaker is always carried, and the connector of the earphone system is removed from the playback device, and then the connector provided by the speaker is plugged into the output terminal of the playback device. You can listen to music information. In addition, the term speaker is generally used as a generic term for having a function of converting and enlarging an electrical signal into sound.

(Patent Document 1) Japanese Unexamined Patent Application Publication No. 8-102987

(Patent Document 2) Japanese Patent Application Laid-Open No. 7-222284

As described above, in most cases, the music information of the playback device is personally listened to by the earphone system, and there is little chance of listening to the music information with a person other than the self. However, in some cases, it is desirable to be able to easily share music information or the like in the above situation.

However, in the case of using the speakers and the like described in Patent Documents 1 and 2, the connector of the earphone system is pulled out from the reproducing apparatus, and then the earphone system is wound or bundled up to be arranged, and the connector provided by the speaker is output terminal of the reproducing apparatus. You must plug in. In addition, when listening to music information through the speaker and then listening to the music information through the earphone, it is necessary to take out the earphone system, replace the connector again, and store the lead wire or the connector included in the speaker.

In recent years, very small and lightweight playback devices have been developed, such as playback devices such as MP3 or mobile phones to which music is delivered. Therefore, also in a portable speaker, more compact weight reduction is requested | required and the simple thing with good design is calculated | required.

This invention is made | formed in order to solve the said subject, The objective is to provide the compact and lightweight voice expander which does not have a lead wire or a connector which a plurality of people can hear the sound which generate | occur | produces in an earphone simultaneously.

The voice expander according to the present invention for achieving the above object is disposed opposite the spiral sounding path whose space cross-sectional area is gradually increased from the start end to the end portion, and is disposed opposite the starting end of the sound path. It is characterized by having an earphone attachment portion.

According to the present invention, since the space cross-sectional area has a spiral-shaped sound path which gradually increases from the start end to the end part, and the earphone attachment part disposed opposite to the position between the start end of the sound path, the earphone is attached to the earphone attachment part. By attaching, the sound exiting from an earphone can be enlarged in a sound path. As a result, when faced with the above-described situation, music information can be easily shared and the like. In addition, since this voice expander is a sound from which the input source of a voice signal comes out of the earphone, and there is no lead wire or connector for connecting to the output terminal of the conventional reproducing apparatus, only the operation of attaching the earphone to the earphone attachment portion is performed. I can hear the information. As a result, there is no need for complicated plugging of the connector, storage of the earphone system, plugging in the connector again, storage of the lead wire or the connector, and the like.

The sound expander of the present invention is the sound expander of the present invention, wherein the sound path is formed by a partition plate formed in a spiral shape and a cover member sandwiching the partition plate from both sides.

According to the present invention, since the sound path is formed by a partition plate formed in a spiral shape and a cover member sandwiching the partition plate from both sides, the partition plate and the cover member formed by, for example, injection molding are desired. It is possible to easily configure the shape path. In addition, by devising the outer shape of the cover member, it is possible to provide a voice expander having good design (designability).

The voice expander of the present invention is the voice expander of the present invention, wherein the earphone attaching portion is formed in a concave shape corresponding to the outer surface shape of the earphone to be attached.

According to the present invention, since the earphone attachment portion is formed in a concave shape corresponding to the outer shape of the earphone to which the earphone is attached, the earphone can be securely attached to the voice expander, and as a result, the music information can be effectively expanded in the sound path. have.

The sound expander of the present invention is characterized in that the earphone attaching portion is provided as a detachable member in the sound expander of the present invention.

According to the present invention, since the earphone attaching part is provided as a detachable member, it is also possible to cope with various shapes of commercially available earphones. That is, by forming a plurality of earphone attachment portions in accordance with the shape of the earphone in advance, the earphone attachment portion can be changed according to the earphone to be used.

EMBODIMENT OF THE INVENTION Hereinafter, the voice expander of this invention is demonstrated based on drawing.

1 is an exploded explanatory view showing an example of the voice expander of the present invention. 2 is a front view of the voice expander of the present invention, FIG. 3 is a left side view of the voice expander of FIG. 2, FIG. 4 is a right side view of the voice expander of FIG. 2, and FIG. 5 is a cross-sectional view of the voice expander of FIG. 2. . 6 is explanatory drawing of the main body member which comprises the voice expander of this invention.

As shown in Figs. 1 to 6, the voice expander 1 of the present invention includes a voice expander main body 2 having a sound path 4, and an earphone attachment part mounted to the voice expander main body 2 ( 3) consists of. In the voice expander 1 of the present invention, the sound path 4 of the voice expander main body 2 is formed in a spiral shape, and the spatial cross-sectional area thereof gradually increases from the start end 4a toward the end 4b. It's growing. Moreover, the earphone attachment part 3 is arrange | positioned facing the position which pinches | interposes the start end part 4a of the sound path 2.

(The voice expander body)

First, the audio expander main body 2 will be described. The audio expander main body 2 is comprised combining the main body member 11 and the pair of cover members 12 and 13 which sandwich the main body member 11 from both sides, as shown in FIG. .

As shown in FIG. 1 and FIG. 6, the main body member 11 includes a spiral partition plate 14 for constituting the sound guide path 4 and an outer plate 15 provided outside the partition plate 14. ) Is a member having.

The partition plate 14 consists of a board material of arbitrary thickness, and cooperates with the pair of cover members 12 and 13 mentioned later to comprise the spiral guide path 4. The length of the partition plate 14 in the width direction is, for example, 15 to 20 from the viewpoint of aiming to reduce the size and weight of the voice expander 1 according to the present invention and to generate sound of sound quality as good as possible. It is preferable that it is about mm. In addition, the length of the partition plate 14 in the width direction is substantially the same as the distance between the pair of cover members 12 and 13, and one side at the time of obtaining the cross-sectional area of the space cross section of the sound guide 4 is shown. To construct.

The outer plate 15 is also made of a plate material having an arbitrary width and thickness, and when viewed in plan from FIG. 6, the left face 15a, the top face 15b, the right face 15c, and the voice expander 1 according to the present invention; 15 d of lower surfaces are comprised, and when it sees from a plane, it is formed in substantially rectangular shape. Since the outer plate 15 constituting each of these surfaces is shown on the surface as an external shape, it is preferable to have a form that emphasizes design. For example, as shown in FIGS. 1 and 2, near the center of each surface. The shape which made the recess smooth can be illustrated.

Convex fitting portions 16 fitted to the concave fitting portions 21 formed at the circumferential edges of the back surfaces 12b and 13b of the respective cover members 12 and 13 at both ends in the width direction of the outer plate 15. Is formed. This convex fitting part 16 is formed around the whole of the outer plate 15, and is concave shape of the convex fitting part 16 of the main-body member 11, and the cover members 12 and 13 mentioned later. The fitting portion 21 is fitted to constitute the voice expander body 2. As shown in FIG. 5, the shape of this convex fitting part 16 may be the form which formed notch in part, or what is called a convex shape. A space portion 17 is formed between the spiral partition plate 14 and the substantially rectangular outer plate 15.

In addition, as shown in FIG. 1 and FIG. 6, the attachment part 18 may be formed in any one position of the outer plate 15. For example, as shown in FIG. 6, the attachment portion 18 includes a right side surface 15c facing the left side surface 15a having the opening portion 5 and a bottom surface 15d constituting the opening portion 5. It is preferable that it is formed in the corner part formed. Since the attachment part 18 formed in such a position acts as a support point at the time of setting up the audio expander 1, and acts to lower a center, the audio expander 1 can be stabilized upright. In addition, this attachment part 18 and the said space part 17 are arbitrary structures.

Next, the sound path 4 is demonstrated in detail.

As shown in Figs. 1, 5 and 6, the sound guide 4 has a partition plate 14 included in the main body member 11 and a rear surface 12b of each of the pair of cover members 12 and 13. 13b). The shape of the space cross section of the sound path 4 is substantially rectangular-shaped as shown in FIG. 5, and the space cross-sectional area of the sound path 4 is gradually increasing toward the terminal part 4b from the start end 4a. The sound path 4 acts to enlarge the sound coming out of the earphone with the earphone attachment part 3. As a result, music information can be easily shared and the like.

In addition, as shown in FIG. 1, the beginning end part 4a of the sound path 4 is a part where the spatial cross-sectional area of the sound path 4 is the smallest, and the part where a vortex starts (the sound path shown in FIG. 6 ( 4), the end portion 4b of the sound path 4 is the portion where the space cross-sectional area of the sound path 4 is the largest and the vortex ends (shown in FIG. 6). Opening 5). In addition, the space cross-sectional area of the acoustic path 4 is an area of the space cross section orthogonal to the vortex imaginary line S passing through the midpoint of the coordinate axis of the side which expands in a vortex shape as shown in FIG.

The start end portion 4a of the sound path 4 may coincide with the center position of the audio expander 1 when viewed in plan view (for example, the front view of FIGS. 2 and 6), but the position shifted from the center position. It doesn't matter. For example, as shown in FIG. 2, the start end part 4a of the sound path 4 can be shifted from the center position to the corner part direction of the side which opposes the corner part in which the attachment part 18 was formed. . In this way, the length of the sound path 4 can be substantially lengthened by shifting the start end 4a of the sound path 4 to the corner side rather than the center position of the sound expander 1.

The end portion 4b of the sound path 4 is a portion where the sound input from the earphone attaching portion 3 expands, and as shown in FIGS. 3 and 6, one surface of the main body member 11 is shown. It is located in the left surface 15a in FIG. 3, and is comprised from the opening part 5 of the audio | voice enlarger 1. As shown in FIG. This opening part 5 is formed in almost half of the left side surface 15a of the said main-body member 11, as shown to FIG. 3 and FIG. Therefore, the outer plate 15 which forms the left side surface 15a is formed in the length from the corner part of the left side surface 15a and the upper surface 15b to the substantially center part of the left side surface 15a.

The shape of the sound path 4 can be obtained by forming the partition plate 14 so that it may become the same shape as the function curve computed by following formula (1) and (2). 10 shows a function curve plotted using the X and Y values calculated by the following equation as the (X, Y) coordinate axes. The distance from the reference point (0, 0) is represented by R = m x exp (u), m represents the magnification factor, and u represents the vortex angle.

X = R x COS (2 pi + pi). One

Y = R × SIN (2πu + π). 2

In this relation, the distance R from the reference point (0, 0) when the angle u is 1 is about 2.718 × m, for example, the (X, Y) coordinate when m is 2 As shown in FIG. 10, it becomes (-5.437, 0), and this point becomes a vortex starting point. Therefore, the coordinate position when the angle u is 1 is the vortex starting point, when the angle u is 2, the vortex is one circumference, and when the angle u is 3, the vortex is Two weeks. Since the end point of the function curve shown in FIG. 10 is a coordinate position where the vortex becomes 2 weeks + 1/4 week, the angle u at the coordinate position is 3.25.

In addition, the curve of the code | symbol 100 in FIG. 10 is a function curve in the case where an enlargement coefficient is 2 and vortex angle range is u = 1-3.25. In addition, the curve of the code | symbol 101 in FIG. 10 is a function curve in case the expansion coefficient m is 2.3 and vortex angle range is u = 1-3.25. The curve 102 in FIG. 10 is a function curve when the magnification coefficient m is 1.7 and the vortex shape angular range is u = 1 to 3.25.

In the relational expression, since the vortex shape changes when the enlargement coefficient m is changed, the enlargement coefficient m and the width of the partition plate 14 (in the opposite direction of the back surfaces 12b and 13b of the cover members 12 and 13). By arbitrarily setting the width), the sound quality of the sound generated from the opening portion 5 through the sound path 4 can be changed.

Next, the cover member will be described.

The cover members 11 and 12 are substantially rectangular plate-shaped members which show a desired external appearance design, and are arrange | positioned in the form which pinches said main-body member 11 in between. As the external design of the cover member, a letter or a pattern such as a logo, a manufacturer's name, a trade name, or the like may be printed or shaped, or an uneven shape formed of an arbitrary shape may be shaped.

It is preferable that the cover members 12 and 13 put emphasis on design, and as a surface form, for example, as shown in FIG. 3 and FIG. 4, it is circular to the plate-shaped member extended to the main-body member 11 side. The form etc. which formed the bulging part of a phase can be illustrated. On the other hand, the surface 12a, 13a of a cover member is a surface opposite to the surface on which the pair of cover members oppose, and the back surface 12b, 13b of the cover member is the surface on the side which a pair of cover members oppose. to be. On the other hand, it is preferable that the shape of the corners of the cover members 12 and 13 also emphasizes design. For example, as shown in Figs. 3 and 4, the four corners are formed in a smooth R shape. The form etc. can be illustrated.

On the rear surfaces 12b and 13b of the cover member, concave fitting portions 21 and 22 to be fitted with the main body member 11 are formed. Among these, the concave fitting portion 21 formed at the circumferential edge of the back surface of the cover member corresponds to the convex fitting portion 16 formed on the outer plate 15 of the main body member 11, and the convex fitting portion 16 is formed. It is fitted with the part 16. On the other hand, the concave fitting portion 22 formed inside the rear surface of the cover member corresponds to the partition plate 14 of the main body member 11 and fits with the end portions in the width direction of the partition plate 14. Lose. In the present invention, the concave fitting portions 21 and 22 formed on the rear surfaces of the cover members 12 and 13 and the partition plate 14 and the outer plate 15 of the main body member 11 are precisely fitted and the voice expander The main body 2 is formed.

The width of the concave portion of the concave fitting portion 21 formed at the circumferential edge of the back surface of the cover member is substantially the same as the width of the convex portion of the convex fitting portion 16 formed on the outer plate 15 of the body member 11. It is preferable that it is formed. In addition, as shown in Fig. 5, the concave wall on the outer surface side of the concave fitting portion 21 formed on the circumferential edge of the back surface of the cover member in consideration of the appearance design and the fitting precision is the concave wall on the inner surface side. It may be lower than. Moreover, it is preferable that the recess part width | variety of the recessed fitting part 22 formed in the back surface inside of the cover member is formed in the substantially same dimension as the thickness of the partition plate 14 of the main body member 11. As shown in FIG.

These recessed fitting parts 21 and 22 are preferably inclined or chamfered at the front end portions of the pair of recessed walls that constitute the recessed fitting part. Thereby, even if the position of the edge part of the partition plate 14 of the main body member 11, and the position of the convex fitting part 16 and the recessed fitting parts 21 and 22 of the outer plate 15 slightly shift | deviated. By the inclined structure or the chamfering structure, the convex fitting portion 16 of the end of the partition plate 14 and the outer plate 15 can be easily guided into the recessed fitting portions 21 and 22.

The cover members 12 and 13 may have the earphone attaching part 3 integrally, or may have the attachment hole 6 for attaching the earphone attaching part 3.

The cover members 12 and 13 having the earphone attaching portion 3 integrally are formed by, for example, an integral molding method such as injection molding, or the earphone attaching portion 3 and the cover members 12 and 13 are adhered to each other. It can form by joining, for example.

On the other hand, in the cover members 12 and 13 which have the attachment hole 6, the attachment hole 6 corresponds to the formation position of the start end part 4a of the sound path 4 formed in the main-body member 11. As shown in FIG. And a diameter larger than that of the start end portion 4a.

On the inner circumferential surface of the attachment hole 6, as shown, for example in FIG. 5 and FIG. 6, the fitting part 7 whose inner diameter becomes two steps is formed. At least one of the fitting portions 7 is formed with a notch fitting portion 8 in which the inner diameter thereof is not two. The fitting part 7 corresponds to the fitting part 34 formed in the outer edge of the earphone attachment part 3, and the notch fitting part 8 is at least 1 place of the outer edge of the earphone attachment part 3; The cover members 12, 13 and the earphone attaching part 3, which correspond to the protrusions 35 formed on the cover, are integrated by fitting the fitting parts 7, 34 formed on each other, and the cover. By the notch fitting part 8 formed in the member side, and the protrusion part 35 formed in the earphone attachment part 3, both are mounted so that it may not move in a circumferential direction.

(Earphone attachment part)

The earphone attaching portion 3 is a portion for attaching the earphone to the voice expander 1 of the present invention. As shown in Figs. 1 and 5, the earphone end portion 4a is sandwiched between the start and end portions 4a of the sound path 4. It is arrange | positioned in the pinching position. This earphone attachment part 3 is formed in the concave shape corresponding to the outer surface shape of the earphone to be attached, and has the sound hole 9.

The sound hole 9 acts as a sound for introducing the sound generated from the earphone into the sound path 4. The sound hole 8 is formed in a substantially cylindrical shape, and its diameter is arbitrarily selected in the range which can transmit the sound from the earphone 10 to the sound path 4.

The earphone attachment part 3 may be formed as a detachable member, or may be integrated with the cover members 12 and 13. When the earphone attachment part 3 is made into a detachable member, it is convenient because it can be changed into a member matching the shape of the earphone to be attached to the voice expander 1 of the present invention. On the other hand, the earphone attaching part 3 and the cover members 12 and 13 can be integrated by joining or integrally molding both members. Among these, when the earphone attaching portion 3 and the cover members 12 and 13 are formed by integral molding, part scores can be omitted, which is advantageous in terms of cost.

The inner circumferential surface 32 of the earphone attaching part 3 is formed with a diameter substantially the same as the outer diameter of the earphone. The left part 33 is formed in the earphone attachment part 3. This seat part 33 acts to support the attached earphone. On the other hand, the sound generated from the earphone enters the sound path 4 from the sound hole 9 on the earphone attachment part 3 side.

A concave fitting portion 36 is formed at the end face of the earphone hole 3 on the sound hole side. The concave fitting portion 36 is fitted with the partition plate 14 at the start end portion 4a of the guide passage 4 of the main body member. That is, when inserting and attaching the earphone attaching part 3 to the attachment hole 6 of a cover member, the edge part of the partition plate 14 is fitted to the recessed fitting part 36. It is preferable that the width (space | interval of two recessed walls) of the recessed fitting part 36 is formed in the dimension substantially the same as the thickness of the partition plate 14. On the other hand, as for this recessed fitting part 36, it is preferable that the tip part of the opposing side of the pair of recessed walls which comprise the recessed fitting part is a slanted structure or a chamfering structure. Thereby, even if the position of the edge part of the partition plate 14 of the main-body member 11 and the position of the recessed fitting part 36 slightly shift | deviated, the edge part of the partition plate 14 is moved by the inclination structure or the chamfering structure. The concave fitting portion 36 can be easily guided.

Although the earphone attaching part 3 is arrange | positioned facing the position which pinches | interposes the start end part 4a of the sound path 4, when the earphone attaching part 3 is a removable member or a joining member, FIG. 1 and FIG. As shown in FIG. 5, the earphone attachment part 3 is formed in the attachment hole 6 mentioned above detachably or joining.

Next, the earphone attaching part 3 which can be attached or detached is demonstrated in detail. Fig. 7 is a cross-sectional view showing an example of a detachable or attachable earphone attaching part that constitutes the voice expander of the present invention.

As shown in FIG. 7, this earphone attachment part 3 has shown the inner peripheral surface 31 whose internal diameter becomes small in two steps. On the surface side of the earphone attachment part 3, the flange part 31 corresponding to the fitting part 7 of the attachment hole 6 of the cover member is formed. The flange part 31 is provided with the fitting part 34 which consists of two steps shape corresponding to the fitting part 7 so that the flange part 31 may fit with the fitting part 7 of the attachment hole 6 of a cover member. Doing. At least one portion of the fitting portion 34 formed at the outer edge of the flange portion 31 is provided with a protrusion 35 corresponding to the notch fitting portion 8 of the attachment hole 6 of the cover member. . When the protrusion 35 is inserted by attaching the earphone attachment portion 3 to the attachment hole 31 of the cover member, the protrusion 35 is fitted to the cut-out fitting portion 8 so that the earphone attachment portion 3 is attached. It does not move in the circumferential direction.

In the voice expander 1 of the present invention, since the earphone attaching part 3 is detachably attached to the cover members 12 and 13, or detachably attached, the earphone attaching part having a shape corresponding to the type of the earphone is provided. Can be equipped with an earphone attachment part according to the shape of the earphone.

FIG. 8: is sectional drawing which shows another example of the detachable or attachable earphone attachment part 3 'which comprises the voice expander of this invention. This earphone attaching part 3 'has shown the inner peripheral surface 32 which internal diameter becomes small by four steps, as shown in FIG. On the surface side of the earphone attachment part 3 ', the flange part 31 corresponding to the fitting part 7 of the attachment hole 6 of a cover member is carried out similarly to the earphone attachment part 3 shown in FIG. Formed. The flange part 31 is provided with the fitting part 34 which consists of two steps shape corresponding to the fitting part 7 so that the flange part 31 may fit with the fitting part 7 of the attachment hole 6 of a cover member. Doing. At least one of the fitting portions 34 formed at the outer edge of the flange portion 31 is provided with a protrusion 35 corresponding to the cutout fitting portion 8 of the attachment hole 6 of the cover member. . When the earphone 35 is inserted by attaching the earphone attaching portion 3 'to the attachment hole 31 of the cover member, the protrusion 35 is fitted to the notch fitting portion 8 so that the earphone attaching portion 3 is attached. ') Does not move in the circumferential direction.

The earphone attachment part 3 'of the form shown in FIG. 8 has three types of inner peripheral surfaces from which the inner diameter differs except the part of the sound hole 9. As shown in FIG. Therefore, even earphones with different outer circumferential diameters can be attached to the earphone attachment part 3.

As mentioned above, although the structural member of the audio expander 1 of this invention was demonstrated, the audio expander main body 2 (body member 11 and a pair of cover member 12, which comprise the audio expander 1 of this invention) were described. 13) and the earphone attachment part 3 can be formed with various materials. As the specific example, resin materials, such as ABS resin and an acrylic resin, are preferable. The voice expander main body 2 and the earphone attaching portion 3 formed of the resin material can easily realize small size and light weight, and are also advantageous in sound reflection characteristics. Since the main body member 11, the cover members 12 and 13, and the earphone attachment part 3 which comprise the audio | voice expander main body 2 are normally made by the method with high productivity, such as injection molding, it is the same kind of resin. Although forming from materials is advantageous in terms of cost, it may be formed from other kinds of resin materials.

The sound expander 1 of this invention integrates each formed member by various joining means. As integration means, the method of performing ultrasonic welding after joining each structural member, the method of fitting after apply | coating an adhesive agent to a fitting part, etc. are mentioned.

As described above, according to the voice expander of the present invention, since the spatial cross-sectional area has a spiral-shaped sound path which gradually increases from the start end to the end part, and the earphone attachment part disposed opposite to the position sandwiching the end part of the sound path, By attaching the earphone to the earphone attachment part, the sound coming out of the earphone can be enlarged in the sound path. As a result, when faced with the above-described situation, music information can be easily shared and the like. In addition, since this voice expander is a sound from which the input source of a voice signal comes out of the earphone, and there is no lead wire or connector for connecting to the output terminal of the conventional reproducing apparatus, only the operation of attaching the earphone to the earphone attachment portion is performed. I can hear the information. As a result, there is no need for complicated plug-in of the connector, storage of the earphone system, plug-in of the connector, storage of a lead wire or connector, and the like.

Moreover, according to the voice expander of this invention, the partition board and cover member which were formed, for example by injection molding etc. can be comprised easily, and the design of the outer surface of a cover member is devised by devising the outer surface form of a cover member. Since a voice expander with good design can be used, it becomes a compact and lightweight voice expander that has good design and is easy to carry.

In addition, according to the voice expander of the present invention, since the earphone can be securely attached to the voice expander, the music information can be effectively expanded in the sound guide. In addition, by forming a plurality of earphone attaching portions corresponding to the shape of the earphones in advance, the earphone attaching portions can be changed in accordance with the earphones to be used.

(How to use the voice expander)

Next, a description will be given of a method of using the voice expander of the present invention comprising the above-described structural members. Fig. 11 is a perspective view showing an example of an embodiment in which an earphone is attached to the voice expander of the present invention. The earphone 10 is a member constituting the earphone system. The earphone system includes, for example, a pair of left and right pairs of earphones 10, a connector (not shown), an earphone 10 and It consists of the cord 41 which electrically connects between connectors. The cords 41 and 41 on the earphone side are branched into two branch lines, and each branch line has a predetermined length.

The voice expander 1 of the present invention has left and right pairs of earphone attaching parts 3 and 3, and attaches a pair of earphones 10 to the earphone attaching parts 3 and 3, respectively. There are various kinds of earphones, for example, (i) those classified as stereo and mononal, (ii) those which are inserted into the inner and outer to be inserted in the ear, etc., and their shapes are subtle. Is different. In this invention, in consideration of such a point, it is preferable that an earphone attachment part is a shape corresponding to various earphone shapes. In addition, in the case of the detachable earphone attaching part, various earphone attaching parts other than those shown here can be provided so as to correspond to various earphones.

As a general method of using a speaker, a connector of an earphone system is inserted into an output terminal (earphone terminal) of a playback device, and an earphone is inserted into an ear to listen to music information. When the voice expander 1 of the present invention wants to share music information with a friend or the like, for example, it can be introduced to a friend while listening to a new song, or a radio news or the like can be heard with a neighbor or a mobile phone. When the user wants to listen to the contents with a family member or a friend, or when the earphone is to be removed from the ear in his or her room or outing place, the request can be sufficiently met.

In the voice expander 1 of the present invention, the sound generated from the earphone 10 reaches the beginning end portion 4a of the sound path 4 through the sound holes 9 and 9 of the earphone attachment portion 33. It extends through the vortex shaped conduit 4. The enlarged sound is output to the outside of the voice expander 1 through the opening portion 5 which is the end portion 4b of the sound path 4. The voice expander 1 can enlarge the sound without using an electric amplification circuit, a diaphragm, or the like. Therefore, since it does not have a lead wire or a connector, and a drive power supply is unnecessary, it becomes small size, light weight, and low cost. In addition, in the audio expander 1 of the present invention, the sound path 4 is formed in a spiral shape, whereby the compactness can be achieved.

In addition, the voice expander 1 of the present invention adjusts the vortex magnification coefficient and the spatial cross-sectional area of the sound path 4, for example, to be generated in the earphone 10, as described in the following examples. Compared with the sound, it is possible to amplify the low range and output a sound in which the reproduction band is expanded.

In addition, as shown in FIG. 1 and the like, the voice expander 1 of the present invention is provided with the opening portion 5 facing to the side, whereby the voice expander 1 of the present invention can be installed in a sexual space with good aesthetics.

In addition, in the case where the earphone 10 is of the monaural type and there is only one earphone 10, as shown in FIG. 9, the attachment member 38 having the sealing portion 37 may be replaced by any of the earphone attachment portions. You may install in one side.

EXAMPLE

An Example is given to the following and this invention is demonstrated to it further more concretely.

(Example)

The audio expander 1 of Example 1 was produced so that it might become the form of FIGS. Using a ABS resin as the material of the main body member 11, the spiral partition plate 14 (about 2 mm thick) and the outer plate 15 (about 2 mm thick) located outside the partition plate 14 are provided. Injection molding into a form having a. The vortex was defined as a function curve when the magnification coefficient (m) was 2 and the angular range of the vortex was u = 1 to 3.25 according to Equations 1 and 2 above. Injection molding was carried out in an approximately square plate shape using an acrylic resin as a material of the pair of cover members 12 and 13. In addition, using ABS resin as the material of the earphone attachment parts 3 and 3, the diameter of a sound hole was ø7 mm, and injection molding was carried out in the aspect shown in FIG.

After sandwiching a pair of cover members 12 and 13 from both sides of the produced main body member 11, and fitting the fitting part of the main body member 11 and the fitting part of the cover member 12 and 13, Both were joined by an ultrasonic welder. Moreover, after attaching the earphone attachment part 3 to the attachment hole 6 of a cover member, both were bonded together by the ultrasonic welder, and the audio expander of this invention shown to FIGS. 1-5 was produced. The produced voice expander 1 has a vertical direction of about 80 mm and a left and right direction of about 80 mm in the plan view of FIG. 2, and a width direction of about 25 mm in the plan view of FIG. 3. Was about 60 g.

(Characteristic evaluation)

Using the voice expander of Example 1, one pair of left and right earphones were respectively attached to the pair of earphone attachment portions. The connector (plug) of the earphone system is connected to the headphone amplifier, a 15 kHz signal is input from the headphones amplifier to the earphone, the converted sound is introduced from the earphone into the voice expander 1, and the opening of the voice expander 1 In (5) the sound was generated. The generated sound measured its frequency characteristics with a measurement microphone, and shows the sound pressure (dBSPL) at each frequency in FIG. In FIG. 12, the code | symbol 200 is the sound pressure frequency characteristic of the sound which came out of the opening part 5 of the voice expander 1 of Example 1, and puts a measurement microphone in the position of 10 cm from the front of the opening part of the voice expander 1; Sound pressure frequency characteristics when installed and measured.

In addition, in FIG. 12, the code | symbol 201 is the sound pressure frequency characteristic of the sound from the earphone single item, and is a sound pressure frequency characteristic when the measurement microphone is installed and measured in the position of 10 cm from the front of the soundproof hole front of a earphone.

The voice expander 1 of Example 1 was able to fully enlarge and hear the sound from the earphone in the sound path 4. Also, from the results shown in Fig. 12, when the sound from the earphone was generated by using the voice expander of the present invention, the low range could be enhanced and the reproduction band could be expanded. Specifically, as shown in FIG. 12, in the sound pressure frequency characteristic (symbol 201) of the earphone alone, the sound pressure gradually decreases toward the frequency lower than about 3 kHz. By attaching the earphone having such a characteristic to the voice expander, the sound pressure frequency characteristic indicated by the code 200 was improved, and the effect of the sound pressure increase was usually obtained in the frequency band of 100 Hz to 5 Hz. In particular, at 600 Pa, a sound pressure rise of about 24 Pa (16 times) was obtained.

As described above, according to the voice expander of the present invention, by attaching the earphone to the earphone attaching portion, the sound exiting from the earphone can be enlarged in the sound path, so that the music information can be easily shared in the above situation. Etc. can be. In addition, since the voice expander can listen to music information only by attaching the earphones to the earphone attachment part, the conventional connector is replaced, the earphone system is stored, the connector is re-plugged, the lead wire or the connector is stored, and the like. It doesn't need the hassle of

Moreover, according to the voice expander of this invention, the partition board and cover member which were formed by injection molding etc. can be comprised easily, for example, and designability is possible by devising the outer shape of a cover member. Since it can be set as a voice expander with a good design, it becomes a compact and lightweight voice expander which has good designability and is easy to carry.

In addition, according to the voice expander of the present invention, since the earphone can be securely attached to the voice expander, the music information can be effectively expanded in the sound guide. In addition, by forming a plurality of earphone attaching portions corresponding to the shape of the earphones in advance, the earphone attaching portions can be changed in accordance with the earphones to be used.

Claims (4)

A vortex-shaped sound path which gradually increases in cross-sectional area from the start end toward the end part, and an earphone attachment part disposed opposite the start end of the sound path; The sound guide is formed by a partition plate formed in a spiral shape, and a cover member sandwiching the partition plate from both sides, And the earphone attaching portion is formed in a concave shape corresponding to the outer surface shape of the earphone to be attached. delete delete The sound expander according to claim 1, wherein the earphone attaching part is provided as a detachable member.

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