WO2010005039A1

WO2010005039A1 - Earphone

Info

Publication number: WO2010005039A1
Application number: PCT/JP2009/062485
Authority: WO
Inventors: 織彰仁平; 哲哉荒澤; 猛一飯島; 正典駒ケ嶺
Original assignee: パイオニア株式会社; 東北パイオニア株式会社
Priority date: 2008-07-09
Filing date: 2009-07-09
Publication date: 2010-01-14
Also published as: WO2010004624A1; EP2299730A4; EP2299730A1

Abstract

Provided is an earphone having a good wearing feeling; and also provided is an earphone of a relatively simple structure wherein leakage of sound is prevented, and good acoustic characteristics are ensured even when the relative angle between a speaker body and an acoustic tube changes. The earphone (1) comprises a speaker housing (2) incorporating a speaker body (3) and having an opening (21) for radiating a sound wave from the speaker body (3), a cylindrical acoustic tube (4), and an elastic pinna insertion body (6) surrounding the acoustic tube (4) and a part of or the whole of the speaker housing (2), wherein the pinna insertion body (6) is formed to be able to be bent or deformed near a part (61) coupling with the acoustic tube (4).

Description

earphone

The present invention relates to an earphone.

An earphone worn on a user's pinna or an external auditory canal is known (see, for example, Patent Document 1).
A housing having a drive unit; and an acoustic tube attached to the front surface of the housing, the acoustic tube being disposed outside a central position of the housing, and a distal end portion of the acoustic tube being a central position of the housing Earphones are known that are directed away from the earphones. The acoustic tube of the earphone is attached to the user's ear.

Japanese Utility Model Publication No. 01-137691

By the way, the shape of the pinna and the external auditory canal is different for each user. Since the positional relationship is fixed so that the housing and the acoustic tube are at a specified angle, the earphone is compressed by the user or receives an uncomfortable feeling when the earphone is attached to the ear canal, etc. There is a risk that this problem will occur.
In the earphone, sound leakage may occur from a portion that is not in close contact with the ear or a portion that has a low degree of close contact.

For example, if the earphone is configured so that the angle of the acoustic tube with respect to the earphone main body can be changed by providing a substantially spherical joint as a joint where the earphone main body and the acoustic tube are connected, the angle is set to a relatively large value. Then, there exists a possibility that an acoustic characteristic may fall. Further, the earphone requires a step of producing a substantially spherical coupling portion.

The present invention is an example of a problem to deal with such a problem. That is, to provide an earphone having a good wearing feeling, to suppress sound leakage, to have good acoustic characteristics even when the relative angle between the speaker main body and the acoustic tube changes, and a relatively simple structure It is an object of the present invention to provide such an earphone.

In order to achieve such an object, the present invention includes at least a configuration according to the following independent claims.

The earphone according to the present invention includes a speaker body portion, a speaker housing portion in which an opening for emitting sound waves from the speaker body portion is formed, a cylindrical acoustic tube, the acoustic tube, and the speaker. It has an elastic pinna insert that surrounds part or all of the casing, and the pinna insert is formed to be able to bend and deform in the vicinity of the connecting portion with the acoustic tube. .

1 is a perspective view of an earphone 1 according to a first embodiment of the present invention. It is the front view (the figure (A)) and back view (the figure (B)) of the earphone 1 which concern on 1st Embodiment of this invention. It is sectional drawing of the earphone 1 shown by FIG. FIG. 4 is an exploded view of the earphone 1 shown in FIG. 3. FIG. 4 is a cross-sectional view of a speaker main body unit 3 built in the earphone 1 shown in FIG. 3. It is a cross-sectional perspective view for demonstrating the pinna insert 6 of the earphone 1 shown by FIG. It is the perspective view (the figure (A)) and sectional drawing (the figure (B)) for demonstrating the pinna insert 6 of the earphone 1 shown by FIG. 1 is a perspective view of an auricle insert 6 and an acoustic tube 4 of an earphone 1 according to a first embodiment of the present invention. It is a perspective view of the earphone 1 at the time of connection with an auricle insertion body and an acoustic tube. FIG. 4 is a diagram for explaining the operation of the earphone 1 shown in FIG. 3. FIG. 4 is a diagram for explaining the operation of the earphone 1 shown in FIG. 3. (A) is a figure for demonstrating the mounting state of the earphone 1, (B) is a figure for demonstrating the other mounting state of an earphone. (A) is a figure for demonstrating the mounting state of the earphone 1, (B) is explanatory drawing which shows each part name of an auricle. It is a side view of earphone 1B concerning a 2nd embodiment of the present invention. It is sectional drawing of the earphone 1B shown by FIG. It is a front view of the electronic device 100 carrying the earphone of FIG.

An earphone according to an embodiment of the present invention includes a speaker main body, a speaker housing portion in which an opening for emitting sound waves from the speaker main body is formed, a cylindrical acoustic tube, an acoustic tube, and It has an elastic pinna insert that surrounds part or all of the speaker housing, and the pinna insert is formed so that it can be bent and deformed in the vicinity of the connecting portion with the acoustic tube.

For example, in the earphone, a sound guide path is formed in the auricle insert and the acoustic tube, and sound waves output from the speaker body are radiated to the outside through the sound guide path of the auricle insert and the sound tube. In the earphone, the auricle insert is formed of an elastic body, a flexible material, or the like, and the auricle insert is formed in a shape that surrounds part or all of the acoustic tube and the speaker housing. When the earphone is attached to the user's ear, the auricle insert is bent and deformed according to the shape of the user's ear, for example, in the vicinity of the connecting portion formed at the tip thereof. More specifically, the earphone is inserted into the user's ear in a state where the elastic pinna insert is bent and deformed so that the acoustic tube and the speaker main body have an optimal angular positional relationship according to the shape of the user's ear. Put on the ear. For this reason, it is possible to provide an earphone having a good wearing feeling for each user.

In addition, the earphone according to the present invention is configured in such a manner that the angle of the acoustic tube axis with respect to the axis of the speaker main body becomes an optimum angle for each user by bending and deforming the elastic pinna insert. So that the earphone and the ear have a relatively large adhesion. For this reason, sound leakage can be suppressed as compared with general earphones.

The earphone has good acoustic characteristics even when the angle of the axis of each of the speaker main body and the acoustic tube is relatively large due to the bending of the elastic pinna insert.
The earphone is easily manufactured by forming the auricle insert into a shape surrounding a part or all of the acoustic tube and the speaker housing with an elastic body (a flexible material) such as a resin. be able to. By assembling the auricle insert, the acoustic tube, and the speaker housing, an earphone that can be bent and deformed with a simple structure can be provided.
Hereinafter, an earphone according to an embodiment of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a perspective view of an earphone 1 according to a first embodiment of the present invention. FIG. 2 is a front view (FIG. (A)) and a rear view (FIG. (B)) of the earphone 1 according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view of the earphone 1 shown in FIG. FIG. 4 is an exploded view of the earphone 1 shown in FIG. FIG. 5 is a cross-sectional view of the speaker main body 3 built in the earphone 1 shown in FIG. 6 is a cross-sectional perspective view for explaining the auricle insert 6 of the earphone shown in FIG. 7 is a perspective view (FIG. (A)) and a sectional view (FIG. (B)) for explaining the auricle insert 6 of the earphone 1 shown in FIG.

The earphone 1 according to an embodiment of the present invention is attached to a user's ear and, for example, a speaker diaphragm vibrates according to a current signal input from a portable music player or the like, and emits sound waves. Earphone 1 is also referred to as a speaker device.

Specifically, as shown in FIGS. 1 to 5, the earphone 1 (speaker device) includes a speaker housing 2, a speaker body 3, an acoustic tube 4, a filter (sound absorbing member) 5, an auricle insert 6, And an earpiece 7.
The speaker housing 2 corresponds to an embodiment of the speaker housing according to the present invention, and the speaker body 3 corresponds to an embodiment of the speaker body according to the present invention. The acoustic tube 4 corresponds to an embodiment of the acoustic tube according to the present invention, and the pinna insert 6 corresponds to an embodiment of the pinna insert according to the present invention. The earplug 7 corresponds to an embodiment of the earplug according to the present invention.
Hereinafter, each component will be described with reference to the drawings.

[Speaker housing (housing) 2]
The casing 2 incorporates the speaker main body 3 and is formed with an opening 21 that emits sound waves from the speaker main body 3. The housing | casing part 2 is formed with materials, such as ABS resin (Acrylonitrile Butadiene Styrene: copolymerization synthetic resin) and resin, for example. In addition, the housing | casing part 2 may be formed with well-known materials, such as a thermoplastic resin and a thermosetting resin.
The housing part 2 is formed with a housing part 210 in which the speaker body part 3 is housed, and the speaker body part 3 is housed in the housing part 210. The housing | casing part 2 has the 1st housing (housing front part) 201 and the 2nd housing (housing rear part) 202, for example. The speaker main body 3 is accommodated in the accommodating portion 210 while the first housing 201 and the second housing 202 are disassembled. After the speaker main body 3 is accommodated in the accommodating portion 210, the first housing 201 and the second housing 202 are joined by a joining method such as bonding with an adhesive or ultrasonic welding.
The housing part 210 may house the entire speaker body part 3 or a part of the speaker body part 3 and may have a shape that can be attached to the housing part 2. It doesn't matter. Specifically, the front surface (side surface on the acoustic tube 4 side) of the housing portion 2 may be covered and fitted with an engaging portion formed on the front surface of the housing portion 2. Examples of the engaging portion include an engaging portion formed on the outer peripheral side surface of the housing portion 2 described later.
As shown in FIG. 3, the housing part 2 is formed with a drawing hole through which the speaker cord 301 drawn from the speaker main body part 3 passes on the side surface or the lower part. Further, as shown in FIGS. 1 and 2, a tubular cord holding portion 310 is provided below the speaker housing portion 2. The speaker cord 301 passes through the cord holder 310 and is electrically connected to an external playback device such as a portable audio player.

As shown in FIGS. 3 and 4, the speaker housing portion 2 is formed in a shape inclined so that the bottom surface portion 2021 faces the acoustic tube 4 side with respect to the central axis P 3 of the speaker main body portion 3.
Since the bottom surface portion 2021 of the speaker housing portion 2 is formed in a shape inclined with respect to the central axis P3 of the speaker main body portion 3, the user can place the bottom surface portion 2021 in a direction perpendicular to the surface with a finger, for example. By pressing, the earphone 1 can be easily attached to the ear canal.

Further, as shown in FIG. 3, the speaker housing portion 2 has a through-hole 2017 that communicates a space formed between the speaker housing portion 2 and the speaker main body portion 3 with the outside. The through hole 2017 is formed on the side opposite to the side on which the opening 21 is formed with respect to the center position of the speaker housing 2.

[Speaker body 3]
The speaker body 3 emits sound waves according to the current signal input from the speaker cord 301. As the speaker main body 3, a known speaker device such as an electromagnetic speaker, a dynamic speaker, an electrostatic speaker, or a piezoelectric speaker can be employed. The speaker body 3 according to the present embodiment employs a dynamic speaker.

For example, as shown in FIG. 5, the speaker body 3 includes a magnetic circuit 31 and a vibrating body 32.
As the magnetic circuit 31, an internal magnetic type magnetic circuit, an external magnetic type magnetic circuit, or the like can be adopted. As the magnetic circuit according to the present embodiment, an internal magnet type magnetic circuit is employed.

The magnetic circuit 31 includes a yoke 311, a magnet 312, and a plate 313.
The yoke 311 is made of, for example, iron, a magnetic material (including a ferromagnetic material), a metal material, or the like. Further, the yoke 311 has a substantially U-shaped radial cross section.
The magnet 312 is formed in a flat plate shape and is disposed on the yoke 311. The magnet 312 may be a permanent magnet such as neodymium, samarium / cobalt, alnico, rare earth, or ferrite magnet. The magnet 312 is magnetized along the axis (P3) direction (acoustic radiation direction SD).
The plate 313 is formed in a flat plate shape and is disposed on the magnet 312. The plate 313 is made of, for example, iron, a magnetic material (including a ferromagnetic material), a metal material, or the like.
In the magnetic circuit 312, a magnetic gap MG is formed between the plate 313 and the yoke 311.

The vibrating body 32 includes a voice coil 321, a voice coil support portion 322, a diaphragm 323, and an edge 324.
The voice coil 321 is joined to the diaphragm 323 directly or via the voice coil support portion 322, and is disposed between the magnetic gaps MG so as to be capable of vibrating in the axial direction. The diaphragm 323 is formed in a dome shape, a flat plate shape, a cone shape, or the like, and a voice coil 321 is joined thereto. The diaphragm 323 according to the present embodiment is formed in a dome shape. The edge 324 is formed in an annular shape, an inner peripheral portion is joined to the diaphragm 323, and an outer peripheral portion is joined to the speaker housing portion 2 (second housing 202).

When a current signal is input to the voice coil 321, the speaker body 3 generates an electromagnetic force in the voice coil 321 according to the current signal and vibrates along the axial direction, and the diaphragm 323 vibrates accordingly. And outputs sound waves in the acoustic radiation direction SD.

[Acoustic tube 4]
As shown in FIGS. 3 and 4, the acoustic tube 4 is formed in a cylindrical shape, and is formed of a relatively large rigid material such as ABS resin.
Specifically, the acoustic tube 4 has substantially the same rigidity as that of the case casing 2, and has a relatively large rigidity as compared with the auricle insert 6. That is, the acoustic tube 4 has rigidity with respect to the first elastic part 601 and the second elastic part 602 in the auricle insert 6 described later.
The acoustic tube 4 is formed in a substantially cylindrical shape, and one end is connected to the auricle insert 6 and the other end is joined to the earplug 7. The acoustic tube 4 according to the present embodiment is detachably connected to the auricle insert 6, for example.

Specifically, as shown in FIGS. 3 and 4, the acoustic tube 4 includes a cylindrical portion 41, a first connecting portion 42, and a second connecting portion 43.
The cylindrical portion 41 has a flange-like first connecting portion 42 formed at one end (auricle insert side) and a flange-like second connecting portion 43 at the other end (earplug side). Is formed.

The acoustic tube 4 is connected by fitting an end portion (first coupling portion 42) opposite to the acoustic radiation side and a coupling portion 61 of the auricular insert 6. At this time, the connecting portion 61 is formed with an annular recess on the inner surface side, and the end portion (first connecting portion 42) opposite to the acoustic radiation direction of the acoustic tube 4 is inserted into the above-described recess. . Moreover, the acoustic tube 4 has a concave cross-sectional shape by projecting both ends of the acoustic tube 4 to the outside, and the end of the ear plug 7 that contacts the acoustic tube 4 is between the both ends of the acoustic tube 4. Has been inserted.
Further, as shown in FIG. 3, the acoustic tube 4 extends so as to warp from the central axis P 3 of the speaker body 3.

[Filter (sound absorbing member) 5]
The filter (sound absorbing member) 5 is provided, for example, in an opening at one end of the acoustic tube 4. As shown in FIG. 3, the filter 5 is disposed on the front surface of the acoustic tube 4. For example, even when a sound wave having an acoustic characteristic with a relatively large sound pressure is output from the speaker main body 3 at a high frequency, the earphone 1 has a high frequency because the acoustic tube 4 is provided with the filter 5. Can be reduced, and has a substantially flat frequency characteristic from the low range to the mid range and from the mid range to the high range. As the filter 5, for example, a sheet-like material composed of a nonwoven fabric, a woven fabric, or a fiber can be employed. The filter 5 is not limited to the above form. For example, you may arrange | position at the both ends of the acoustic tube 4, and may be arrange | positioned at one edge part.

[Auricular insert 6]
The auricle insert 6 is formed of an elastic body, and is formed in a shape surrounding part or all of the acoustic tube 4 and the housing 2 as shown in FIG. 3. As the elastic body, a flexible material such as a resin such as silicone rubber may be employed. The auricle insert 6 according to the present embodiment is formed so as to cover the speaker housing 2 as shown in FIG. 3, for example. Further, the auricle insert 6 is formed to be bendable in the vicinity of the connecting portion 61 with the acoustic tube 4.

The auricle insert 6 has a first elastic part 601 and a second elastic part 602. In the auricle insert 6 according to this embodiment, a first elastic portion 601 and a second elastic portion 602 are integrally formed. The pinna insert 6 is formed by a first elastic portion 601 and a connecting portion 61 to which the acoustic tube 4 is connected.

The first elastic part 601 is made of a relatively large rigid material. The second elastic part 602 is made of a material having a lower rigidity than that of the first elastic part 601. The second elastic portion 602 is formed on a part of the auricular insert 6 in the vicinity of the connecting portion 61 and on the speaker housing portion 2 side with the connecting portion 61 as a boundary in the auricular insert 6. Is done. By reducing the rigidity of this portion, the vicinity of the connecting portion 61 with the acoustic tube 4 can be effectively bent.

Specifically, the first elastic portion 601 preferably has a hardness value of, for example, about 60 ° to 80 °, and optimally has a hardness value of 70 °, in order to prevent the acoustic tube 4 from coming off. . The second elastic portion 602 is a hardness value in that the connecting portion 61 can be bent and deformed so that the acoustic tube and the speaker main body have an optimal positional relationship according to the shape of the user's ear. Is preferably about 20 ° to 40 °, and most preferably has a hardness value of 30 °. The hardness is measured, for example, with a hardness meter prescribed in JIS K 6253 Type A. For example, the first elastic portion 601 is formed of silicon rubber having a hardness of 70 °, and the second elastic portion 602 is formed of silicon rubber having a hardness of 30 °.

The first elastic portion 601 and the second elastic portion 602 are formed by, for example, a double mold manufacturing method (two-color molding manufacturing method). The double mold manufacturing method is a manufacturing method in which different materials are combined and integrally molded in a mold.
The manufacturing method of the auricle insert 6 is not limited to the above embodiment. For example, the auricle insert 6 may be formed by joining the first elastic part 601 and the second elastic part 602 with an adhesive or the like, or formed by an integral molding method such as an inner molding method. May be.

In addition, the auricle insert 6 includes a connecting portion 61, an accommodating portion 62, a sound guide hole portion 65, an auricle contact portion 66, and a vent hole 67, as shown in FIGS.
The connection part 61 is formed in one edge part (acoustic tube 4 side), and the acoustic tube 4 is connected so that attachment or detachment is possible. For example, the connecting portion 61 is formed in a shape corresponding to the shapes of the tubular portion 41 and the first connecting portion 42, and in detail, the cross-sectional shape is formed in a substantially C shape, and the acoustic tube 4 is formed. By engaging with the flange-shaped first connecting portion 42, the acoustic tube 4 is connected. Moreover, since the connection part 61 is formed with the elastic body (1st elastic part 601) with comparatively high rigidity, it can connect with the acoustic tube 4 reliably and suppresses the disconnection of the acoustic tube 4. Can do. The connecting portion 61 has a sound guide hole portion along the axial direction.

Further, the auricle insert 6 is formed such that the connecting portion 61 and the speaker housing portion 2 are separated by a specified distance L600 or more, and the bent portion 600 in the vicinity of the connecting portion 61 can be bent and deformed.

The housing part 62 houses the speaker housing part 2. The accommodating portion 62 is formed by the second elastic portion 602 and has a shape corresponding to the shape of the speaker housing portion 2. In detail, the cross-sectional shape is formed in a substantially C shape. In addition, the accommodating portion 62 is formed with an engaging portion 621 that protrudes inward at an end portion, and this engaging portion 621 is connected to an engaged stepped portion 2025 as an engaged portion of the speaker housing portion 2. By engaging, the speaker housing part 2 can be reliably accommodated.

Further, a cord holding portion 310 is provided on the outer peripheral side surface where the engaged portion of the speaker housing portion 2 is formed. In particular, by providing the cord holding portion 310 on the outer peripheral side surface of the speaker housing portion 2, the width (size) of the earphone 1 in the depth direction can be made relatively small. The required space can be made relatively small (space saving).

Further, since the cord holding portion 310 is provided in the engaged portion of the speaker housing portion 2, a notch portion 62 A is formed in the engaging portion 621 of the housing portion 62 according to the shape of the cord holding portion 310. ing. By disposing the cord holding portion inside the notch 62A, the storage portion 62, in other words, the auricle insert 6 can be engaged with the speaker housing portion 2.

Incidentally, the speaker main body 3 of the earphone 1 may be made relatively large with respect to the earplug 7 for the purpose of making the sound pressure of the earphone 1 relatively large. In this case, the speaker housing 2 that houses the speaker main body 3 is mounted in the auricle while protruding from the external auditory canal (H71; FIG. 13B) to the auricle. Specifically, the speaker housing 2 is between the tragus (H72; FIG. 13 (B)) and the counter bead (H74; FIG. 13 (B)) and the counter ring (H75; FIG. 13 (B)). And is fixed to the ear while being in contact with the antipods and antipodal ring. In such an earphone wearing state, the speaker housing portion 2 protrudes relatively large from the external auditory canal, so that the outside and the speaker housing portion 2 are likely to come into contact with each other, and the earphone 1 may fall off from the user's ear. is there. In particular, the earphone 1 may fall off the user's ear due to an external force acting on the speaker housing 2 via a cord lead wire 301 provided in the speaker housing 2.

In order to prevent the earphone 1 from dropping off, the length of the speaker housing portion 2 in the central axis direction is made relatively small, and the speaker housing portion 2 is brought closer to the ear canal side, thereby preventing contact with the outside, It is possible to prevent the earphone 1 from falling off the user's ear. Further, in order to make the length of the speaker body 3 relatively small, a cord lead wire 301 may be provided from the side surface of the speaker housing 2. Even if the cord lead wire 301 is provided on the side surface of the speaker housing portion 2, the speaker housing portion 2 is fixed to the user's ear in a state of being closer to the external auditory canal. Even if it acts on the body part 2, the earphone 1 is less likely to drop off from the user's ear.

Further, when the auricle insert 6 is engaged with the speaker housing 2, for example, when the earphone 1 is stored in a storage case such as a user's back, the auricle insert 6 and the speaker housing are arranged. In some cases, external force acts on the body part 2 and the auricle insert 6 and the speaker housing part 2 come off.

In addition, when the earphone 1 is attached to the user's ear, the cord lead wire 301 is pulled or the like, and an external force acts on the auricle insert 6 and the speaker housing 2, so that the auricle insert 6 May be dropped from the user's ear in a state where the speaker housing 2 is attached to the user's ear.

In addition, as the outer shape of the speaker housing part 2 increases, the region where the auricle insert 6 covering the speaker housing part 2 contacts the user's ear increases. When the contact area of the pinna insert 6 with the user's ear increases, the frictional force generated between the user's ear and the pinna insert 6 when the user attaches or removes the earphone 1 is large. Thus, the pinna insert 6 may be easily detached from the speaker housing 2 in some cases.

Therefore, in order to maintain a good engagement state of the auricle insert 6 with the speaker housing 2, the engaging portion 621 that engages the speaker housing 2 with the speaker housing 2 is shown in FIGS. As shown in FIG. 7, the third elastic portion 603 having rigidity larger than that of the second elastic portion 602 is formed. By forming the engaging portion 621 with the third elastic portion 603, the pinna insert 6 can be prevented from falling off the speaker housing portion 2.

The third elastic portion 603 may be made of the same material as the first elastic portion, and is not particularly limited as long as it is formed of a material having rigidity with respect to the second elastic portion.

The third elastic portion 603 preferably has a hardness value of about 10 ° to 40 ° so that the speaker housing portion 2 and the auricle insert 6 are in a good engagement state. The value of is 20 °. The hardness is measured, for example, with a hardness meter prescribed in JIS K 6253 Type A. Thus, for example, the first elastic portion 601 is formed of silicon rubber with a hardness of 70 °, the second elastic portion 602 is formed of silicon rubber with a hardness of 30 °, and the third elastic portion is formed with a hardness of 20 °. ing.

The third elastic portion 603 may be the same as the case where the first elastic portion 601 and the second elastic portion 602 are molded, and is formed by, for example, a double mold manufacturing method (two-color molding manufacturing method). The double mold manufacturing method is a manufacturing method in which different materials are combined and integrally molded in a mold.

The method for manufacturing the auricle insert 6 is not limited to the above form. For example, the auricle insert 6 may be formed by joining the second elastic portion 602 and the third elastic portion 603 with an adhesive or the like, or formed by an integral molding method such as an inner molding method. May be.

The sound guide hole 65 is formed inside the auricle insert 6, specifically, formed between the connecting portion 61 and the accommodating portion 62, and the sound tube 4 and the opening portion of the speaker housing portion 4. Communicate. Further, the sound guide hole 65 is formed in a direction along the central axis of the acoustic tube 4 and is formed along a direction deviating from the central axis of the speaker main body 3.
The auricle contact portion 66 has a planar shape that surrounds the sound guide hole portion 65, and extends in a direction that warps from the central axis P 4 of the acoustic tube 4 between the acoustic tube 4 and the speaker housing portion 2. Is formed. Further, the auricle contact portion 66 is formed in a shape inclined to the speaker housing portion side. Specifically, the auricle contact portion 66 is formed with a protruding portion 661 having a protruding shape along an axis P66 that is substantially parallel to the surface 2021 of the bottom surface portion of the speaker housing portion 2. The protruding portion 661 protrudes in a direction inclined toward the speaker housing portion 2 side.
That is, the speaker housing portion 2 and its bottom surface portion 2021 are formed so as to be substantially parallel to the auricle contact portion 66.

When the earphone 1 is attached to the user's ear, the auricle contact portion 66 is deformed according to the shape of the user's auricle and is in close contact with the auricle. For this reason, it is possible to suppress the occurrence of sound leakage.
Moreover, since the protrusion part 661 is formed in the shape which the auricle contact part 66 extends in the direction deviating from the central axis P4 of the acoustic tube 4, it is possible to prevent the earphone 1 from being detached from the user's ear. it can.

The earphone 1 is prepared in advance with a plurality of auricle inserts 6 having different shapes and sizes of the auricle contact portions 66, and can be freely attached to a desired auricle insert 6 so as to fit the shape of the user's ear. Can be exchanged.

The ventilation hole 67 is formed so as to communicate with the through-hole 2017 formed in the speaker housing part 2. Since the earphone 1 has a through-hole 2017 that communicates with the vent hole 67, a plurality of sound waves are prevented from interfering (resonating) between the speaker diaphragm and the speaker housing portion 2 when the speaker is driven. be able to. In addition, an increase in sound pressure level between about 20 Hz and about 500 Hz can be suppressed. For this reason, the so-called “sounding feeling” can be reduced.

Further, even if the vent hole 67 communicating with the through hole 2017 is formed in the pinna insert 6, the user's external auditory canal blocks external sound waves at the pinna insert 2, particularly the pinna contact portion 66. Therefore, it is suppressed that the sound which a user wants to hear becomes difficult by the sound wave radiated | emitted from the through-hole 2017 through the ventilation hole 67. FIG.

In the auricle insert 6, since the connecting portion 61 is formed of the first elastic portion 601 having a relatively high rigidity, the bent portion 600 (second elastic portion 602) of the auricle insert 6 is bent. Even in this case, the acoustic tube 4 can be prevented from being crushed, and the earphone 1 can radiate sound waves with good acoustic characteristics.
Moreover, since the connection part 61 is formed with the comparatively high rigidity 1st elastic part 601 of the auricle insertion body 6, the acoustic tube 4 can be reliably fixed to the auricle insertion body 6, and others. This portion (the bent portion 600 or the like) is formed by the relatively small rigid second elastic portion 602, so that the direction of the acoustic tube 4 can be changed relatively freely.

[Earplug 7]
The earplug 7 is inserted into the ear canal of the user's outer ear. As shown in FIG. 1, the earplug 7 includes a cylindrical portion 71 that is attached to an end portion on the acoustic emission side of the acoustic tube 4 and communicates with the acoustic tube 4, and an outer peripheral portion 72 is formed to be elastically deformable. Yes. The earplug 7 and the acoustic tube 4 are formed as members that can be separated from each other. The earplug 7 is formed of a soft material such as silicone rubber.
Specifically, the cylindrical portion 71 is formed in a shape in which the inner diameter of the outer peripheral end (acoustic radiation side end) is larger than the inner diameter of the acoustic tube 4. In the structure of the earplug 7 communicated with the acoustic tube 4, the internal structure becomes a horn shape, and the acoustic characteristics are improved.

As shown in FIG. 3, the earphone 1 emits sound waves output from the speaker body 2 from the opening 21 of the speaker housing 2, and the sound waves are emitted from the auricle insert 6 and the acoustic tube 4. It passes through the sound guide path and is radiated to the outside through the filter 5 from the opening of the earplug 7.

FIG. 8 is a perspective view of the auricle insert 6 and the acoustic tube 4 of the earphone 1 according to the first embodiment of the present invention. FIG. 9 is a perspective view of the earphone 1 when the pinna insert and the acoustic tube are connected.
With reference to FIGS. 8 and 9, the operation of mounting the auricle insert 6 with the acoustic tube 4 of the earphone 1 will be described.

As shown in FIGS. 8 and 9, the acoustic tube 4 is pressed toward the auricle insert 6 along the axial direction (the direction of the central axis P4 of the acoustic tube 4), and the acoustic tube 4 and the auricle of the elastic body are pressed. The acoustic tube 4 is attached to the auricle insert 6 by fitting with the connecting portion 61 of the insert 6.
When removing the acoustic tube 4 from the auricle insert 6, it can be removed by pressing the acoustic tube 4 toward the opposite side of the auricle insert 6 along the axial direction.

10 and 11 are diagrams for explaining the operation of the earphone 1 shown in FIG.
As shown in FIGS. 10 and 3, at the initial stage, the acoustic tube 4 has its axis P4 at a specified angle θ1 with respect to the central axis P3 of the speaker housing 2 (speaker body 3). Is formed. When the earphone 1 is attached to the user's ear, as shown in FIG. 10, the bent portion 600 near the connecting portion 61 of the auricle insert 6 is bent, so that the central axis P4 ′ of the acoustic tube 4 is initially set. It is possible to deviate in the range from the position of [theta] to the angle [theta] 2. The angle θ2 is, for example, about 80 degrees toward the central axis P3 and about 30 degrees toward the opposite side. In the present embodiment, the angle θ2 is, for example, about 10 degrees with respect to the initial central axis P4. Further, the acoustic tube 4 can be shifted by about 10 degrees in the direction perpendicular to the plane including the initial central axis P4 and the central axis P3.

As shown in FIG. 11, since the auricle contact portion 66 is formed around the sound conduit 4, the auricle contact portion 66 moves along with the sound conduit 4 in accordance with the movement of the earplug 7. Therefore, when the earplug 7 falls in a direction intersecting with the central axis P3 of the speaker housing 2, the projection 661 of the auricle contact portion 66 rises along the central axis P3. On the other hand, when the earplug 7 rises along the central axis P3, the protrusion 661 falls down in a direction intersecting the central axis P3.

12 and 13 are diagrams for explaining various wearing states of the earphone 1.
As shown in FIGS. 12A and 12B, when the earphone 1 is attached to the external ear canal H71 of the user H, the auricular insert 6 is bent and deformed according to the shape of the external ear canal H71. The earphone 1 and the ear canal H71 are in close contact with each other. Furthermore, when the earphone 1 is worn, the pinna contact portion 66 of the pinna insert 6 comes into contact with the pinna H70 and deforms, thereby having high adhesion. Thus, since the earphone 1 is attached to the user's ear with relatively high adhesion, sound leakage can be suppressed.

Further, in the earphone 1 provided with the auricle insert 6, the connecting portion 61 to which the acoustic tube is detachably connected is formed by a relatively large rigid first elastic portion 601. Even when the relative angle with the acoustic tube changes, the sound guide path of the auricle insert 6 is not crushed, the sound guide path is secured, and good acoustic characteristics are obtained.

Further, as shown in FIG. 13A, the speaker housing 2 is disposed outside the ear canal H71 and on the concha H73 side, and a part of the acoustic tube 4 is attached to the speaker housing 2. By bending and deforming, the earplug 7 is inserted into the external auditory canal H71, a part of the auricle contact part 66 abuts on the concha H73, and a part of the accommodating part 62 abuts on the tragus H72. The external auditory canal H71 is sealed with respect to the outside (refer to FIG. 13B for the names of each part of the pinna H70).

As described above, since the auricle contact portion 66 is formed around the sound conduit 4, the auricle contact portion 66 moves along with the sound conduit 4 following the movement of the ear plug 7 (see FIG. 11). . Therefore, when the earplug 7 is inserted into the external auditory canal H71, the earplug 7 bends with respect to the speaker housing 2 along the external ear canal H71 of the user's ear. At this time, since the auricle contact portion 66 also moves in the same direction as the direction in which the earplug 7 is bent, the inside of the external auditory canal H71 can be satisfactorily sealed.
Specifically, when the earplug 7 is inserted into the external auditory canal H71, the auricle contact portion 66 moves in the direction in which the earplug 7 bends, and a part of the concha H73 and the protruding portion of the auricle contact portion 66 are moved. 661 abuts. In addition, since the accommodation part 62 of the auricle insert 6 abuts on a part of the tragus H72, the external auditory canal H71 is well sealed by the protrusion 661 and the accommodation part 62 of the auricle contact part 66.
Further, since the bottom surface portion 2021 of the speaker housing portion 2 is formed substantially in parallel with the projection portion 661 of the auricle contact portion 66, the user presses the bottom surface portion 2021 so that the auricle H73 is pinched. The protruding portion 661 of the contact portion 66 can be brought into contact, and the ear canal H71 can be well sealed from the outside.

[Second Embodiment]
FIG. 14 is a side view of an earphone 1B according to a second embodiment of the present invention. FIG. 15 is a cross-sectional view of the earphone 1B shown in FIG. The description of the same configuration as in the first embodiment is omitted.

As shown in FIGS. 14 and 15, the earphone 1 B according to the second embodiment of the present invention includes a speaker housing 2 B, a speaker body 3, an acoustic tube 4, an auricle insert 6 B, and an earplug 7. Have.
Compared to the first embodiment, the earphone 1 B according to the present embodiment is formed such that the angle θ 1 between the central axis P 3 of the speaker housing 2 B (speaker body 3) and the central axis P 4 of the acoustic tube 4 is small. Yes.
In the earphone 1B according to the present embodiment, the acoustic tube 4 and the auricle insert 6B are formed by a molding method, and the acoustic tube 4 cannot be removed from the auricle insert 6B. Specifically, the auricle insert 6B is molded in a state of being fitted to the acoustic tube 4.
Further, the auricle insert 6B has an engaging portion 68 formed at the end opposite to the connecting portion of the acoustic tube 4 engaged with the engaged portion 2015 of the speaker housing portion 2B. Are joined to the speaker housing 2B.

The earphone 1B is formed such that the elastic pinna insert 6B can be bent and deformed in the vicinity of the connecting portion with the acoustic tube 4, so that the acoustic tube 4 can be bent with respect to the speaker body 3. It has a relatively high adhesion and can suppress sound leakage.

As described above, the earphone according to the present invention incorporates the speaker main body 3 and the speaker casing 2B in which the opening 21 for radiating sound waves from the speaker main body 3 is formed, and the cylindrical shape. The acoustic tube 4 has an elastic pinna insert 6 surrounding part or all of the tube 4 and the speaker housing 2, and the pinna insert 6 is located near the connection portion 61 with the sound tube 4. Since it is formed so as to be able to be bent and deformed, it has a good wearing feeling when worn on the user's ear.

Specifically, when the earphone 1B is attached to the user's ear, the auricle insert 6 is bent in the vicinity of the connecting portion formed at the tip of the auricle insert 6 according to the shape of the user's ear, for example. The earphone 1 is attached to the user's ear, with the acoustic tube 4 and the speaker main body 3 deformed so that the positional relationship of the optimum angle according to the shape of the user's ear. For this reason, it is possible to provide an earphone having a good wearing feeling for each user.

In addition, the earphone 1 is configured such that the elastic pinna insert 6 is bent and deformed so that the angle of the axis of the acoustic tube with respect to the axis of the speaker main body becomes an optimum angle for each user. Therefore, it has a relatively large adhesion between the earphone and the ear, and sound leakage can be suppressed as compared with a general earphone. The earphone 1 also has good acoustic characteristics even when the auricle insert 6 is bent.

Further, in the auricle insert 6 of the earphone 1, the connecting portion 61 is formed by the first elastic portion 601, and the portion on the speaker housing portion 2 side is formed by the second elastic portion 602 with the connecting portion 61 as a boundary. The engaging portion 621 formed in the housing portion 62 is formed by the third elastic portion 603, and the first and second

elastic portions

601 and 603 are made relatively rigid, and the second elastic portion 602 is formed. Therefore, the direction of the acoustic tube 4 connected to the connecting portion 61 and the earplug 7 attached to the connecting portion 61 can be freely changed with respect to the speaker housing portion 2 accommodated in the accommodating portion 62. In addition, the speaker housing portion 2 can be firmly engaged in the housing portion 62.

Further, when the earphone 1 is attached to the user's ear, the projection of the auricle contact portion 66 in the auricle insert 6 is accompanied by the change in the angle of the earplug 7 due to the insertion of the earplug 7 into the ear canal H71. Since the portion 661 comes into contact with the concha H73, the external auditory canal H71 can be satisfactorily sealed from the outside with the auricle insert 6. Thereby, sound leakage can be suppressed and intrusion of ambient noise into the ear canal H71 can be suppressed.

The present invention is not limited to the above embodiment. For example, you may combine each embodiment. For example, the flat portion of the speaker housing 2B may be formed so as to be substantially parallel to the pinna contact portion of the pinna insert 6B.
The speaker housing part 2 and the speaker body part 3 are not limited to the above forms. Further, the shape of the auricle insert 6 is not limited to the above form.

Further, the earphone 1 may be used for electronic devices such as a portable audio player and a portable video player. FIG. 16 shows a portable audio player 100 and an earphone 1 as electronic devices. The portable audio player 100 includes a portable case 101 formed of a resin member or a metal member, various operation switches 103 and a display 104 provided on the front surface 102 of the portable case 101. The electronic device 100 includes a connector 115 on the bottom surface 107, and electrically connects a signal generation device in the electronic device 100 and a signal processing device in another electronic device.
The earphone 1 is attached to the electronic device 100 as an external product. The earphone 1 includes a remote controller unit 151, an earphone unit 152, a plug unit 153, and a cord unit 154. The remote controller unit 151 is configured so that the electronic device 100 can be remotely controlled via a cord 154 by a small switch, a small monitor, or the like. The remote controller unit 151 is configured to be able to execute, for example, volume adjustment, balance control of the left and right earphone units 152, selection and change of screen display contents, programs or game contents by external operations. Such control can also be performed by the operation switch 103 provided on the front face 102. The earphone unit 152 is configured to convert the sound signal received via the code 154 into a sound wave and output the sound.
As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention. In addition, each of the above-described embodiments can divert each other's technology as long as there is no particular contradiction or problem in its purpose and configuration. Note that, in this application, all the contents described in PCT / JP2007 / 0667517 filed internationally on September 7, 2007 are incorporated in this application.

Claims

A speaker housing having a built-in speaker body and an opening for emitting sound waves from the speaker body;
A cylindrical acoustic tube;
An elastic pinna insert that surrounds part or all of the acoustic tube and the speaker housing;
The earphone insert is formed so as to be able to bend and deform in the vicinity of a connecting portion with the acoustic tube.
The acoustic tube and the auricle insert are formed as members that are separable from each other,
The auricle insert includes a connecting portion that connects to the acoustic tube, and a housing portion that houses the speaker housing portion,
The connecting portion is formed of a first elastic portion,
Among the auricle inserts, a part of the auricle insert in the vicinity of the connecting portion is more rigid than the first elastic portion, with the connecting portion as a boundary. The earphone according to claim 1, wherein the earphone is formed of a second elastic portion having a small diameter.
The earphone according to claim 2, wherein the acoustic tube has rigidity with respect to the first elastic portion and the second elastic portion.
The auricle insert is provided between the coupling portion and the housing portion, and a sound introduction hole portion communicating with the acoustic tube and the opening of the speaker housing portion,
The earphone according to claim 3, wherein an auricle contact portion having a planar shape surrounding the sound guide hole portion is formed.
The sound guide hole is formed in a direction along the central axis of the acoustic tube, and is formed along a direction deviating from the central axis of the speaker main body.
The earphone according to claim 4, wherein the auricle contact portion extends in a direction deviating from a central axis of the acoustic tube.
The said auricle contact part is provided with the protrusion part which protrudes toward the direction inclined in the said speaker housing | casing part side while it is the direction which curves from the center axis | shaft of the said acoustic tube. earphone.
The engaging portion that engages with an engaged portion formed on an outer peripheral side surface of the speaker housing portion is formed in the accommodation portion of the auricle insert. earphone.
The engaging portion of the accommodating portion has a shape protruding inward,
The engaged portion of the speaker housing portion is formed as a stepped portion,
The earphone according to claim 7, wherein the engaging portion of the housing portion and the engaged portion of the speaker housing portion are fitted.
A cord holding part is provided in the engaged part of the speaker housing part,
The earphone according to claim 8, wherein a notch portion is formed in the engaging portion of the housing portion, and one end of the cord holding portion is disposed inside the notch portion.
10. The earphone according to claim 9, wherein the engaging portion of the housing portion is formed of a third elastic portion having higher rigidity than the second elastic portion.
The cylindrical acoustic tube has rigidity,
An earplug attached to the end of the acoustic tube on the acoustic emission side;
The earplug and the acoustic tube are formed as members that are separable from each other,
11. The earphone according to claim 10, wherein an end of the acoustic tube opposite to an acoustic radiation side and a connection portion of the auricle insert are fitted and connected.
The connection part of the auricle insert has an annular recess formed on the inner side surface,
The earphone according to claim 11, wherein an end of the acoustic tube opposite to an acoustic radiation side is inserted into the recess.
The acoustic tube has a concave cross-sectional shape by projecting both ends of the acoustic tube toward the outside,
The earphone according to claim 12, wherein an end portion of the earplug that contacts the acoustic tube is inserted between both end portions of the acoustic tube.
The speaker housing part is formed with a through-hole that communicates the space formed between the speaker housing part and the speaker body part and the outside.
The earphone according to claim 13, wherein the through hole is formed on a side opposite to a side on which the opening is formed with respect to a center position of the speaker casing.
The earphone according to claim 14, wherein a filter is provided at an end of the acoustic tube on the acoustic radiation side.
An earplug attached to the end of the acoustic tube on the acoustic emission side;
The speaker housing is disposed outside the ear canal and on the concha side,
A part of the acoustic tube is bent and deformed with respect to the speaker housing, and the earplug is inserted into the ear canal.
The part of the auricle contact portion abuts on the concha and the part of the storage portion abuts on the tragus so that the ear canal is sealed from the outside. Earphone as described in.
The earphone according to claim 16, wherein the speaker housing portion is formed so as to be inclined so that a bottom surface portion thereof faces the acoustic tube side with respect to a central axis of the speaker main body portion.
18. The earphone according to claim 17, wherein the speaker housing part is formed so that a bottom surface part thereof is substantially parallel to the auricle contact part.
An electronic device comprising the earphone according to claim 1.