JP2017225201A - earphone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earphone device capable of providing satisfactory wearing touch and enhanced sound quality.SOLUTION: An earphone includes: a driver unit 12 that converts an electric signal to be inputted to an oscillation; a housing 5 that houses the driver unit 12 to an inner part; an earpiece 3 that is extended to a forward direction of the housing 5, and holds the driver unit 12 and the housing 5 to an ear pinna so as to be deformed by fitting to the shape of an external canal; and a code holding part 6 that includes an almost cylindrical shape, is arranged so as to extend to a rear direction from a rear side of the driver unit 12 at almost the same level as the length of the earpiece 3, holds a code 7 for transmitting an electric signal to the driver unit 12, and a rear direction end part of which a rear direction surface faces to the rear direction on an opposite side of the earpiece 3. The code holding part 6 has the almost cylindrical shape which can be griped by fingers of a user when wearing it to the ear pinna of the user, and at least rear direction end part is arranged outside an ear auricle cavity when wearing it to the ear pinna.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an earphone, and is suitably applied to, for example, an earplug-type earphone.

  Conventionally, in an earphone device, a diaphragm in a driver unit housed in a housing of a housing portion is vibrated in accordance with an audio signal supplied from a portable music player or the like to change the air density state. Thus, a sound corresponding to the audio signal is generated.

  For example, in a lateral-in-the-ear type earphone device, the earphone device can be attached to the user's ear by supporting the housing of the earphone device with the user's tragus and rosary. (For example, refer to Patent Document 1).

  In the earphone device having such a configuration, since the shape of the auricle varies depending on the user, when the user wears the earphone device, a gap is formed between the housing and the ear canal, and sound leaks into the gap. There was a problem.

  Further, in the earphone device having such a configuration, the shape and size of the tragus and the tragus differ depending on the user, and depending on the user, the housing cannot be supported by the tragus and the tragus, and the wearing state is maintained for a long time. There was also a problem that the wearability was bad, such as being unable to do.

  On the other hand, in the earphone device of the vertical in the ear type, the diaphragm is arranged in a state directly facing the entrance of the user's ear canal, and is relatively less affected by the shape around the ear canal entrance, A voice with stable sound quality can be provided to the user (see, for example, Patent Document 2).

  In the earphone device having such a configuration, a holder for holding on the ear, such as a headband or an ear hanger for wearing by the user, is necessary, and there is a problem that the headband is not excellent in terms of portability and the headband is located on the head. As a result, the user's hairstyle is disturbed.

  As shown in FIGS. 15 (A), 15 (B) and 15 (C), as solutions to the problems of the lateral in the ear type earphone device and the vertical in the ear type earphone device, An earpiece 31 that is shaped to match the ear canal when worn, a substantially cylindrical sound conduit 32 provided inside the earpiece 31, a housing 33 having a substantially spherical shape to which the sound conduit 32 is attached, and a housing 33. There is an earplug-type earphone device 30 configured by a cord 7 to be integrally formed and a cord 7 connected to a driver unit (not shown) inside the housing 33.

  15A is a side view of the earphone device 30 viewed from the YZ plane, and FIG. 15B is a rear view of the earphone device 30 viewed from the XZ plane. (C) is the top view which looked at the earphone apparatus 30 from the XY plane.

  The housing 33 can generate sound corresponding to the audio signal by vibrating the diaphragm in the driver unit in accordance with the audio signal supplied via the cord 7.

  The sound conduit 32 protrudes from the central portion of the front side of the housing 33. When the sound conduit 32 is worn, the sound conduit 32 is inserted into the ear canal via the earpiece 31 and the sound output via the driver unit of the housing 33 is led to the ear canal. It is made like that.

  The earpiece 31 is made of an elastic material and its shape can be freely deformed. Therefore, when the earpiece 31 is inserted into the ear canal, the earpiece 31 is in close contact with the ear canal and maintains a tightly attached state to the user's ear. It is possible to provide a soft wearing feeling.

Japanese Patent Publication No. 6-81351 Japanese Examined Patent Publication No. 6-59120

  By the way, in the earphone device 30 having such a configuration, as shown in a top view 16 (A) in which the user wearing the earphone device 30 is taken along the A1-A1 ′ cross section, the housing 33 does not come into contact with the tragus 22. As the width W2 of the housing 33 is restricted, the size of a diaphragm (not shown) housed in the housing 33 is also restricted, so the diaphragm is made smaller.

  As a result, the earphone device 30 not only has a small amount of air in front of the diaphragm that can be compressed or pulled to output a low sound, but the air itself often escapes to the side of the diaphragm. The air density cannot be changed sufficiently and the bass sound cannot be output efficiently.

  Further, in the earphone device 35 using the housing 34 having a width W3 wider than the width W2 of the housing 33, as shown in FIG. The diaphragm housed in the housing 34 can be enlarged by expanding the width W3 of the housing 34. However, the housing 34 and the tragus 22 come into contact with each other when worn on the user's ear. It becomes difficult to maintain the state or to attach it.

  Therefore, in the earplug type earphone device 30, the size of the diaphragm is inevitably limited in order to improve the wearing state. Therefore, it is not possible to provide a sound with sufficiently good sound quality. When the diaphragm is enlarged, there is a problem that the wearability is deteriorated.

  The present invention has been made in consideration of the above points, and an object of the present invention is to propose an earphone device that has a good wearing feeling and can provide a sound with good sound quality.

  In order to solve such problems, in the earphone of the present invention, a driver unit that converts an input electric signal into vibration, a housing part that houses the driver unit, and a front part of the housing part that fits the shape of the ear canal The earpiece that holds the driver unit and the housing portion in the auricle by being deformed and a substantially cylindrical shape are arranged so as to extend from the rear side to the rear side of the driver unit to approximately the same length as the earpiece. The cord holding the cord that transmits the electric signal to the driver unit, and the cord holding portion having the rear end with the rear end face facing the rear is provided on the opposite side of the earpiece, and the cord holding portion is used when wearing the user's auricle It is a generally cylindrical shape that can be grasped by a person's fingertips, and at least the posterior end is placed outside the concha cavity when wearing the auricle. .

  As a result, when the user wears the earphone on the ear, the width of the housing can be increased compared to the conventional case without bringing the housing into contact with the tragus. It is possible to increase the diameter of the diaphragm in the unit and to allow the user to listen to high-quality sound with good wearability.

  As described above, according to the present invention, a driver unit that converts an input electric signal into vibration, a housing part that houses the driver unit, and a front part of the housing part that extends forward and deforms in conformity with the shape of the ear canal. The driver unit includes an earpiece that holds the driver unit and the housing portion in the auricle, and a substantially cylindrical shape, and is arranged to extend from the rear side of the driver unit to the rear to substantially the same length as the earpiece. A cord holding portion having a rear end portion with a rear end face facing rearward is provided on the opposite side of the earpiece, and the cord holding portion is attached to the user's fingertip when wearing the user's ears. It can be gripped by the user, and when the auricle is worn, at least the rear end is arranged outside the concha cavity so that the user can When the phone is attached to the ear, the vibration in the driver unit housed in the housing can be expanded as compared with the conventional case without bringing the housing into contact with the tragus. To realize an earphone that can widen the aperture of the board and allow the user to listen to high-quality sound in a state of good wearability, thus providing a good sound quality and a good sound quality. it can.

It is a side view which shows the earphone apparatus by this invention. It is a rear view which shows the earphone apparatus by this invention. It is a bottom view which shows the earphone apparatus by this invention. It is a top view which shows the left ear mounting part of the earphone apparatus by this invention. It is a side view which shows the left ear mounting part of the earphone apparatus by this invention. It is a rear view which shows the left ear mounting part of the earphone apparatus by this invention. It is a basic diagram with which it uses for description of the offset and inclination of an earphone apparatus. It is a top view which shows the earphone apparatus for a measurement. It is a side view which shows at the time of mounting the earphone device for measurement. It is a top view which shows at the time of mounting the earphone device for measurement. It is a basic diagram which shows a measurement result. It is a side view which shows the mounting state of an earphone apparatus. It is a top view which shows the mounting state of an earphone apparatus. It is a basic diagram with which it uses for description of the offset and inclination of the sound conduit | pipe in other embodiment. It is a basic diagram which shows the structure of the conventional earphone apparatus. It is a top view which shows the time of conventional earphone wearing.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) Appearance of Earphone Device As shown in FIGS. 1 to 3 in which the same reference numerals are assigned to corresponding parts to FIG. 15, 1 shows the earphone device of the present invention as a whole, and the user's ear canal when worn , A substantially cylindrical sound conduit 4 provided inside the earpiece 3, a substantially spherical housing 5 to which the sound conduit 4 is attached, and a substantially integrated integrally with the housing 5. A cylindrical cord holding portion 6 and a cord 7 connected to a driver unit inside the housing 5 are configured.

  Here, FIG. 1 is a side view of the earphone device 1 viewed from the YZ plane, FIG. 2 is a rear view of the earphone device 1 viewed from the XZ plane, and FIG. It is the bottom view seen from -Y plane.

  As shown in FIG. 1, the earphone device 1 has a housing 5 in accordance with an audio signal supplied from a portable music player or the like via a cord 7 connected to the portable music player or the like (not shown). By vibrating a diaphragm (not shown) in a driver unit (not shown) housed inside, the air density on the front surface of the diaphragm is changed, and a sound corresponding to an audio signal is generated. Has been made to get.

  Note that the cord holding portion 6 of the earphone device 1 fixes the drawing position of the cord 7 drawn out from the housing 5 and allows the user to hold the cord holding portion 6 with a fingertip when the cord is attached.

  As shown in FIGS. 1 and 3, the sound conduit 4 protrudes integrally with the surface of the housing 5 on the front side of the housing 5, and when the earphone device 1 is attached to the user's ear, Sound is derived from the conduit tip 4A to the ear canal 23 (FIG. 16).

  Further, the sound conduit 4 is made of ABS (Acrylonitril Butadiene Styrene) resin as a material thereof, so that sound is guided to the ear canal 23 without leaking sound output from the housing 5.

  Further, the earpiece 3 is made of silicon rubber as a material thereof, and thus has an elastic force. When the earphone device 1 is attached to the user's ear, the earpiece 3 is deformed according to the shape of the ear canal 23 and is in close contact with the earpiece 3. The sound derived from the sound conduit 4 is not leaked to the outside.

(2) Internal Configuration of Earphone Device Next, the internal configuration of the earphone device 1 will be described with reference to FIG. 4 to FIG.

  4 is a top view of the earphone device 1 taken along the A2-A2 ′ cross section, FIG. 5 is a side view of the earphone device 1 taken along the A3-A3 ′ cross section, and FIG. It is a rear view when the earphone apparatus 1 is made into the A4-A4 'cross section.

  As shown in FIGS. 4 and 5, the housing 5 is configured such that a housing front portion 5A and a housing rear portion 5B formed of plastic are ultrasonically welded and joined so as to maintain a sufficiently airtight state of the internal space. Yes.

  The housing 5 is formed by ultrasonic welding and joining the housing front part 5A and the housing rear part 5B. Since the resin melted at this time leaks to the outside, the resin is protected and concealed. It is sealed with a rubber ring 16.

  Further, the housing 5 is formed to have a width W1 larger than the width W2 of the conventional housing 33 (FIG. 16A), and accordingly, from a diaphragm (not shown) housed in the conventional housing 33. The large diaphragm 15 can be accommodated.

  Further, as shown in FIGS. 5 and 6, the cord holding portion 6 stores the cord knotting balls 11 of the cord 7, and the cord 7 is detached from the housing 5 when the cord 7 is pulled by the user. It plays a role as a stopper to prevent it from falling off.

  As shown in FIGS. 4 and 5, the driver unit 12 housed in the housing 5 includes a magnet 13, a voice coil 14, and a diaphragm 15, and the voice coil is included in the magnetic circuit configured by the magnet 13. 14 is arranged, and the diaphragm 15 is driven in accordance with an audio signal input to the voice coil 14 via the cord 7 to change the density state with respect to the air in front of the diaphragm 15. Thus, the sound corresponding to the sound signal is led out to the outside through the sound conduit 4.

(3) Setting method of offset and angle of sound conduit By the way, the earphone device 1 (FIG. 3) is a sound projecting on the front side of the housing 5 as compared with the conventional earphone device 30 (FIG. 15C). The conduit 4 is attached to the X direction side of the center line L1 of the housing 5, that is, the sound conduit 4 is offset by a predetermined offset amount with respect to the center line L1 of the housing 5.

  Further, in comparison with the conventional earphone device 30, the earphone device 1 has the sound conduit tip 4 </ b> A facing away from the center line L <b> 1 of the housing 5, that is, the sound conduit 4 is at a predetermined angle (hereinafter referred to as the Y-axis). This is called the tilt angle.

  As shown in FIG. 7, the offset amount and the inclination angle of the sound conduit 4 will be described with reference to a top view when the earphone device 1 is taken along the A2-A2 ′ cross section.

  Here, a central point on the front surface of the housing front portion 5A (hereinafter referred to as a housing front middle point P1) and a central point on the rear surface of the cord holding portion 6 (hereinafter referred to as a cord holding portion middle point P2). , The center line L1 of the housing 5 is drawn, and the central axis L2 of the sound conduit 4 passing through the center point of the sound conduit tip 4A (hereinafter referred to as the sound conduit tip middle point P3) and the housing 5 The inclination angle AR1 about the intersection P5 with the center line L1 is the inclination of the sound conduit 4 with respect to the housing 5, and the center axis L2 of the sound conduit 4 and the front of the housing in the X axis direction from the center line L1 on the XY plane. The distance to the intersection of the parts 5A (hereinafter referred to as the sound conduit root point P4) is defined as the offset amount OF1.

(3-1) Sound conduit offset setting method In this offset setting method, the offset amount OF1 is determined by measuring a dummy ear created by taking a mold from an actual human ear, In this embodiment, for example, 5 [mm] is set.

(3-2) Sound conduit inclination angle setting method Next, an angle setting procedure of the inclination angle AR1 of the sound conduit 4 with respect to the front surface of the housing 5 will be described below.

  In this inclination angle setting method, first, as shown in FIG. 8, a measurement earphone device 8 in which a measurement rod 17 is bonded to the back side of the cord holding unit 6 is prepared. The offset amount OF1 of the measurement earphone device 8 is set to 5 [mm], and the inclination angle of the sound conduit 4 with respect to the front surface of the housing 5 is set to 40 [°], for example.

  Next, in this inclination angle setting method, an arbitrary person is selected as a measurement target, the measurement earphone device 8 is attached as shown in FIG. 9, and the measurement earphone device 8 is attached as shown in FIG. The inclination angle AR2 with respect to the side surface of the head of the measuring rod 17 is measured.

  Furthermore, in the tilt angle setting method, the measurement results of the tilt angle AR2 are totaled, and after the average value of the tilt angle AR2 is obtained, the tilt angle of the sound pipe 4 of the measurement earphone device 8 is 40 [° ], The result of subtracting the average value of the inclination angle AR2 is defined as the inclination angle AR1 of the sound conduit 4.

  In this inclination angle setting method, the above-described inclination angle AR2 is measured for any 33 persons, the measurement results are summarized in the table shown in FIG. 11, and the average value of the inclination angle AR2 is obtained. As a result, the inclination angle AR2 is obtained. And the average value 7 [°] of the tilt angle AR2 is subtracted from the tilt angle 40 [°] of the measurement earphone device 8, and the tilt angle AR1 of the sound conduit 4 is 33 [°]. It is made to set.

  Incidentally, in the present embodiment, the above-described measurement of the inclination angle AR2 is performed on 33 persons, but may be performed on other various persons.

  Therefore, the earphone device 1 determines the position and the inclination angle at which the sound conduit 4 protrudes from the housing 5 based on the offset setting method and the inclination angle setting method, so that the width W1 of the housing 5 is the width of the conventional housing 33. Even when it is larger than W2, it is possible to provide a good wearing feeling to a user having a general ear shape.

(4) Wearing of Earphone Device The earphone device 1 can be worn on the user's ear by inserting the earpiece 3 into the ear canal 23 (FIG. 16). FIG. 12 shows a state in which the user wears the earphone device 1, and FIG. 13 shows a top view when the user wearing the earphone device 1 is taken along the A1-A1 ′ cross section.

  As shown in FIG. 13, when the earphone device 1 is in the mounted state, the housing 5 is located in the concha cavity 21 indicated by a thick broken line, and the earpiece 3 having elasticity is inserted into the ear canal 23. By deforming in accordance with the shape of the external auditory canal 23, it is in close contact with the external auditory canal 23 so that the wearing state can be maintained for a long time.

  In this earphone device 1, the width W1 of the housing 5 is made larger than the width W2 of the housing 33 of the conventional earphone device 30 (FIG. 16A), so that the driver housed in the housing 5 is used. The diaphragm 15 (FIG. 4) in the unit can also be made larger than the conventional one. Specifically, the diameter K of the diaphragm 15 of the earphone device 1 (FIG. 4) is 13.5 [mm], whereas the diameter of the diaphragm of the conventional earphone device 30 is 9 [mm]. Therefore, when a sound of 1 [kHz] is output with a power of 1 [mW], it has been found that the sensitivity can be improved by about 6 to 8 [dB] compared to the conventional earphone device 30.

(5) Operation and Effect In the above configuration, the earphone device 1 has the sound conduit 4 (FIG. 7) offset by the offset amount OF1 in the X-axis direction with the center line L1 of the housing 5 as the reference line, and the sound conduit tip Since the midpoint P3 is directed away from the center line L1, even if the housing 5 having a width W1 larger than the width W2 of the housing 33 in the conventional earphone device 30 is used, the user's tragus 22 (FIG. 13). ) Can be mounted without contacting the housing 5.

  Further, in the earphone device 1, the offset amount OF1 and the inclination angle AR1 are set based on the average value of the actual measurement results. Therefore, when the user wears a general ear shape, the housing 5 is connected to the tragus 22. This eliminates the point that the user cannot wear or is difficult to wear, and can provide a good wearing feeling.

  In addition, the earphone device 1 is housed in the housing 5 because the width W1 (FIG. 13) of the housing 5 is made larger than the width W2 (FIG. 16A) of the housing 33 in the conventional earphone device 30. The diaphragm 15 (FIG. 4) can be enlarged, and a high-quality sound with a lower sound than that of the prior art can be provided.

  Further, since the sound pipe 4 is offset from the housing and is inclined by the inclination angle AR1, the earpiece 3 is in close contact with the ear canal 23 (FIG. 13) even when the housing 5 and the diaphragm 15 are enlarged. In addition, since the wearing state can be maintained, a comfortable wearing feeling can be given to the user and high-quality sound can be provided.

  And since the earphone device 1 does not have a headband or ear hangers, the headband portion as shown in Patent Document 2 described above is located on the head, thereby disturbing the user's hairstyle, This eliminates the difficulty of doing so and further improves usability.

  According to the above configuration, the earphone device 1 can provide a sound with a good feeling of wearing and improved sound quality.

(6) Other Embodiments In the above-described embodiment, the case where silicon rubber is used as the material of the earpiece 3 has been described. However, the present invention is not limited to this, and for example, a urethane resin or an acrylic resin. Various materials such as these may be used.

  In the above-described embodiment, the case where the ABS resin is used as the material of the sound conduit 4 has been described. However, the present invention is not limited to this, and other various resins such as polypropylene and polystyrene are used. Anyway.

  Furthermore, in the above-described embodiment, the case where only the ABS resin is used as the material of the sound conduit 4 has been described. However, the present invention is not limited to this, and an elastomer resin is used as the base material of the sound conduit. As a material other than the base of the sound conduit, a flexible resin such as ABS may be used, and a so-called two-color molding material may be used as the material of the sound conduit 4.

  In this case, the sound conduit 4 has a portion other than the sound conduit root having flexibility so that the sound conduit tip 4A can be bent. When the sound conduit 4 is attached to the user's ear, the sound conduit 4 and the earpiece 3 are It can be bent and mounted in a direction with a better wearing feeling.

  Further, in the above-described embodiment, the case where the diameter K (FIG. 4) of the diaphragm 15 is set to 13.5 [mm] has been described. However, the present invention is not limited to this, and the housing 5 is provided in the ear shell. If it can be located within the range of the lumen 21 (FIG. 13), the diameter K may be various diameters K such as 13.6 [mm] and 13.4 [mm]. In this case, the earphone device 1 can allow the user to listen to high-quality sound with good wearability, in the same manner as when the aperture K of the diaphragm 15 is 13.5 [mm]. .

  Furthermore, in the above-described embodiment, the case where the inclination angle AR1 of the sound conduit 4 is set to 33 [°] has been described. However, the present invention is not limited to this, and the number of measurement objects and the measurement result are 10 [ [°] to 60 [°] is also available. However, it was 30 [°] to 50 [°] that many measurement subjects obtained a good fit when worn.

  Furthermore, in the above-described embodiment, the case where the offset amount OF1 is set to 5 [mm] has been described. However, the present invention is not limited to this, and in the case where the measurement subject is a foreigner, for example, 3 to 3 You may make it set to 7 [mm].

  Furthermore, in the above-described embodiment, the case where the inclination angle AR1 is an angle centered on the intersection P5 between the central axis L2 of the sound conduit 4 and the central line L1 of the housing 5 has been described. For example, as shown in a top view of the earphone device 1 having an A2-A2 ′ cross section shown in FIG. 14, an intersection P6 between a straight line L3 passing through the sound conduit tip middle point P3 and the center line L1 of the housing 5 It is good also as an angle centering on.

  Furthermore, in the above-described embodiment, the offset amount OF1 is described as the distance from the center line L1 to the sound conduit root point P4 in the X-axis direction. However, the present invention is not limited to this, for example, FIG. The center line L1 and the X-axis direction, such as the distance from the center line L1 to the sound pipe tip midpoint P3 in the X-axis direction, as shown in FIG. The distances to various constituent points in the sound conduit 4 may be set as the offset amount OF1.

  Further, in the above-described embodiment, the case where the earphone device 1 as the earphone is configured by the housing 5 as the housing and the sound conduit 4 as the sound conduit has been described. The earphone may be configured by the housing and the sound conduit.

  The present invention can be applied to earphone devices used in portable music players, radios, televisions, and personal computers.

  DESCRIPTION OF SYMBOLS 1 ... Earphone apparatus, 3 ... Earpiece, 4 ... Sound conduit, 5 ... Housing, 30 ... Conventional earphone apparatus.

In order to solve such a problem, in the earphone of the present invention, a driver unit that converts an input electric signal into vibration , a housing portion, and a position offset from the center on the front surface of the housing portion in the outer peripheral direction with respect to the center. In the direction away from the center, the center line perpendicular to the front surface of the housing part passes through the intersection intersecting the rear side of the driver unit and inside the housing part so as to extend on a central axis having a predetermined angle with respect to the center line. Protruding sound conduits are provided .

As described above, according to the present invention, the driver unit that converts the input electric signal into vibration , the housing portion, and the direction away from the center from the position offset from the center on the front surface of the housing portion in the outer peripheral direction. Toward the front of the housing portion and a center line perpendicular to the front surface of the housing portion and passing through an intersection intersecting the rear of the driver unit and inside the housing portion so as to extend on a central axis having a predetermined angle with respect to the center line. By providing the sound conduit , when the user puts the earphone on the ear, the housing can be expanded compared to the conventional one without bringing the housing into contact with the tragus. Enlarge the aperture of the diaphragm in the driver unit that is housed so that the user can listen to high-quality sound with good wearability Can, thus good wearing feeling, it is possible to realize an earphone capable of providing voice and good sound quality.

Claims (12)

A driver unit that converts the input electrical signal into vibration;
A housing portion for accommodating the driver unit therein;
An earpiece that extends forward of the housing part and holds the driver unit and the housing part in the auricle by deforming in conformity with the shape of the ear canal;
Including a substantially cylindrical shape, and arranged to extend from the rear side of the driver unit to the rear side to approximately the same length as the earpiece, holding a cord for transmitting the electrical signal to the driver unit, On the opposite side, a cord holding part having a rear end part whose rear end face faces rearward, and
With
The cord holding part has a substantially cylindrical shape that can be grasped by the user's fingertip when wearing the user's auricle, and at least the rear end is disposed outside the concha cavity when wearing the auricle. The earphone according to claim 1, wherein a ring portion surrounding the housing portion is disposed on a side of the housing portion. The earphone according to claim 2, wherein a material of the ring portion is rubber. The earphone according to claim 2, wherein the ring portion is disposed at a position surrounding the periphery of the driver unit. The earphone according to any one of claims 2 to 4, wherein the housing part includes a housing part front part and a housing part rear part, and the ring part covers a joint part between the housing part front part and the housing part rear part. . The earphone according to claim 2, wherein an outer periphery of the ring portion includes a curved surface. The earphone according to any one of claims 2 to 6, wherein the ring portion is disposed in a concha cavity of a user. The earphone according to claim 2, wherein an outer diameter of the ring of the ring portion is larger than an outermost shape of the earpiece. The earphone according to any one of claims 1 to 8, wherein an outermost outer shape of the earpiece is larger than an outer shape of the rear end portion of the cord holding portion disposed outside the concha cavity. The earphone according to any one of claims 1 to 9, wherein a corner portion is chamfered around the rear end portion of the cord holding portion. The earphone according to any one of claims 1 to 10, wherein a cross-sectional shape of the cord holding portion in the vicinity of the rear of the driver unit and a cross-sectional shape of the vicinity of the rear end portion are substantially the same. The earphone according to claim 1, wherein a sound corresponding to the electric signal supplied from a music player is generated.

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