WO2020213029A1 - Full cover-type earpiece and earphone provided with same - Google Patents

Abstract

An earpiece 25 according to an embodiment of the present invention is provided with: a cover section 50 that has a substantially oval shape extending from the tragus 102 facing the cavity of concha 101 of a user toward the antitragus 103 when viewed while in use from a direction along the axis C1 of a yoke 10 for supporting a vibrating membrane 9 and that covers, from the outside in a direction orthogonal to the axis C1, the entire outer circumference of a case 3 in which a speaker 2 comprising the yoke 10 is accommodated; a sound-transmitting cylindrical body 60 that has a cylindrical shape protruding from a part in the cover section 50 facing the vibrating membrane 9 toward the opposite side of the vibrating membrane 9 from that of the yoke, and that is for transmitting sound emitted by the speaker 2 to the ear canal 100 in the ear of the user; and an annular protrusion 70 having an annular shape protruding from the inner circumference of the cover section 50 toward the opposite side of the yoke 10 from that of the vibrating membrane 9 so as to be capable of supporting the outer circumference section of the case 3.

Description

Full-cover earpiece and earphones with it

The present invention relates to a full-cover type earpiece and an earphone provided with the full-cover type earpiece.

Conventionally, a canal type earphone that is used by inserting the earphone into the ear canal of the user's ear is known. For example, Patent Document 1 discloses a structure including a sealing collar extending from an ear tip that can be inserted into the ear canal. In Patent Document 1, when the earphone is used, the ear canal is sealed from the space outside the ear by bringing the sealing collar portion into contact with the edge of the transition portion between the ear canal and the concha.

Special Table 2017-509284

By the way, in such earphones, it is desired to improve not only the sealing performance when using the earphones but also the wearing stability.

Therefore, an object of the present invention is to improve the wearing stability of a full-cover type earpiece and an earphone equipped with the earpiece.

As a means for solving the above problems, the aspect of the present invention has the following configuration.
(1) The full-cover type earpiece according to the aspect of the present invention covers the entire outer periphery of the case accommodating the speaker having the yoke supporting the vibrating membrane from the outside in the direction orthogonal to the axis of the yoke, and is said to be in use. The vibration from a covering portion having a substantially oval shape extending from the ear bead facing the user's concha cavity when viewed from the direction along the axis toward the bead, and a portion of the covering portion facing the vibrating membrane. The film has a tubular shape that protrudes toward the side opposite to the yoke, and has a sound passage tube for propagating the sound produced by the speaker to the external auditory canal in the user's ear, and an outer peripheral portion of the case. An annular convex portion that is supportably projecting from the inner circumference of the covering portion toward the side of the yoke opposite to the vibrating film is provided.
Here, the oval shape means a shape having two line segments parallel to each other and two arcs connected to both ends of each line segment. The substantially oval shape includes an elliptical shape (a curve consisting of loci of points such that the sum of distances from two fixed points on a plane is constant).

(2) The full-cover type earpiece according to (1) above further includes a folded-back portion that is folded back from the tip end portion of the sound-carrying cylinder toward the covering portion, and the folded-back portion can be inserted into the ear canal. It may have a tulip-shaped shape.

(3) In the full-cover type earpiece according to (2) above, the sound-carrying cylinder has a first sound-passing portion to which the folded-back portion is connected, a portion of the covering portion facing the vibrating membrane, and the above. A second sound passage portion that connects the first sound passage portion and the cover portion so as to be separated from the folded portion may be provided.

(4) In the full-cover type earpiece according to (3) above, the first sound communication portion has a cylindrical shape, the outer diameter D1 of the first sound communication portion is less than 6 mm, and the first sound communication portion is described. The shaft length L1 of the portion may be 6 mm or more, and the ratio D1 / L1 of the outer diameter D1 to the shaft length L1 may be less than 1.

(5) In the full-cover type earpiece according to (4) above, the first sound passage portion has an elliptical shape in a cross-sectional view, and the cross-sectional area of the first sound communication portion having the elliptical shape is 28. It may be less than .3 mm ² .

(6) In the full-cover type earpiece according to any one of (3) to (5) above, the second sound passage portion is a first connecting end portion connected to the first sound communication portion. The second connecting end portion is provided with a second connecting end portion connected to the covering portion, the second connecting end portion has an outer diameter larger than the outer diameter of the first connecting end portion, and the second sound passage portion is , The diameter may be gradually increased as it approaches the second connecting end from the first connecting end.

(7) In the full-cover type earpiece according to any one of (1) to (6) above, the covering portion is formed in the vicinity of the outer periphery of the case so as to be connected to the sound passage cylinder, and the sound is said. The portion on the side opposite to the tubular body may have a convex curved shape toward the side opposite to the case, and may be provided with a tragus contact portion for contacting the tragus.

(8) In the full-cover type earpiece according to (7) above, the covering portion is formed on the side opposite to the tragus contact portion with the case sandwiched therein, and is convex toward the side opposite to the case. In addition to forming a curved shape and bulging, the tragus contact portion for contacting the tragus connected to the tragus may be further provided.

(9) In the full-cover type earpiece according to any one of (1) to (8) above, the length of the long axis of the covering portion having a substantially oval shape when viewed from the direction along the axis. May be 15.5 mm or more and 17.5 mm or less.

(10) In the full-cover type earpiece according to any one of (1) to (9) above, the covering portion, the sound passage cylinder and the annular convex portion are integrally formed of the same elastic material. You may be.

(11) In the full-cover type earpiece according to (10) above, the elastic material may be silicone rubber.

(12) The earphone according to the aspect of the present invention has a vibrating membrane, a yoke for supporting the vibrating membrane, a speaker that emits sound by vibration of the vibrating membrane, a case that accommodates the speaker, and the above. It is equipped with a full-cover type earpiece.

(13) In the earphone according to the above (12), the case is an inner case located on the inner peripheral side of the case and the inner case so as to be rotatable relative to the inner case around the axis. An outer case that supports the outer peripheral portion may be provided.

(14) In the earphone according to the above (12) or (13), the case has a tubular shape protruding from a portion of the case facing the vibrating membrane toward the side opposite to the yoke of the vibrating membrane. In addition, a stem that supports the base end portion of the sound transmission cylinder may be provided.

(15) In the earphone according to any one of (12) to (14) above, the full-cover type earpiece has an opening for being detachably attached to the case and is along the axis. Seen from the direction, the opening may be smaller than the outer shape of the case.

According to the full-cover type earpiece described in (1) above of the present invention, the entire outer circumference of the case accommodating the speaker is covered from the outside in the direction orthogonal to the axis of the yoke, and is viewed from the direction along the axis in the used state. The following effects are obtained by providing a cover portion having a substantially oval shape extending from the tragus facing the user's concha cavity toward the tragus.
Since the entire outer circumference of the case is covered by the cover, the earpiece feels soft when the earpiece is used (when the earpiece is attached to the ear). In addition, since the covering portion has a substantially oval shape extending from the tragus toward the tragus in the used state, it is easy to support the long axis end of the covering portion on the tragus side and the tragus side. Therefore, the mounting stability can be improved.
In addition, from the cord including the vertical vibration noise of the cord (noise generated by rubbing the cord in the longitudinal direction) and the horizontal vibration noise of the cord (noise generated by shaking the cord and hitting clothes etc.) The transmitted noise can be reduced by about 6 to 12 dB (1/2 to 1/4).
In addition, the following effects can be obtained by providing an annular convex portion that projects from the inner circumference of the covering portion toward the side opposite to the vibrating film of the yoke so as to support the outer peripheral portion of the case.
Since the entire outer circumference of the case is supported by the annular convex portion, it is possible to suppress the formation of a gap between the case and the annular convex portion, and it is possible to suppress sound leakage.
It is preferable that the covering portion has an oval shape extending from the tragus facing the tragus cavity of the user toward the tragus when viewed from the direction along the axis in the used state. An oval shape of the covering portion may be slightly more advantageous than an elliptical shape in terms of mounting stability.

According to the full-cover type earpiece according to the above (2) of the present invention, a folded portion is further provided which is folded back from the tip end portion of the sound transmission tube toward the covering portion, and the folded portion is a tulip that can be inserted into the ear canal. Having the shape of the mold has the following effects.
When using the earpiece, the folded part flexibly contacts the ear, so that the wearing stability can be further improved. In addition, since the ear canal is blocked by the folded portion, the ear canal can be sealed from the space outside the ear.

According to the full-cover type earpiece described in the above (3) of the present invention, the sound passage cylinder has a first sound passage portion to which the folded portion is connected, a portion of the covering portion facing the vibrating membrane, and a folded portion. The following effects can be obtained by providing a second sound passage portion that connects the first sound passage portion and the cover portion so as to be separated from each other.
When a force is applied to the sound transmission tube in the direction of removal, the operating point (the point where the force acts) and the fixed point (the base end of the sound communication tube) are close to each other, and the earpiece tends to come off easily. It is in. On the other hand, according to this configuration, since the distance between the operating point and the fixed point is long by the length of the second sound passage portion, it is possible to prevent the earpiece from coming off. In addition, when the earpiece is used, the first sound passage portion can be inserted into the depth of the ear canal by the length of the second sound passage portion, so that the intrusion of external noise can be suppressed.

According to the full-cover type earpiece according to the above (4) of the present invention, the first sound passage portion has a cylindrical shape, the outer diameter D1 of the first sound passage portion is less than 6 mm, and the first sound passage portion is described. The shaft length L1 of the through portion is 6 mm or more, and the ratio D1 / L1 of the outer diameter D1 to the shaft length L1 is less than 1, so that the following effects are obtained.
Compared with the case where the outer diameter of the first sound passage portion is 6 mm or more, the first sound passage portion can be easily inserted into the ear canal. In addition, the flexibility of inserting the first sound passage into the ear canal can be increased as compared with the case where the axial length of the first sound passage is less than 6 mm. In addition, the ease and flexibility of inserting the first sound passage into the ear canal can be increased as compared with the case where the ratio D1 / L1 is 1 or more. In addition, it is effective in reducing pain caused by a feeling of pressure on the ear canal when used for a long time.

According to the full-cover type earpiece according to the above (5) of the present invention, the first sound passage portion has an elliptical shape in a cross-sectional view, and the cross-sectional area of the first sound passage portion having an elliptical shape is 28. When it is less than 3 mm ² , the following effects are obtained.
The mounting stability can be further improved as compared with the case where the first sound passage portion has a perfect circular shape in a cross-sectional view. When the first sound passage portion has an elliptical shape in a cross-sectional view, it matches the shape of a general ear canal, so that the feeling of pressure on the ear canal can be reduced.
When the first sound passage portion has an elliptical shape in a cross-sectional view, the above-mentioned cross-sectional area of less than 28.3 mm ² is prioritized, and the diameter of the ellipse may be 6 mm or more.

According to the full-cover type earpiece according to the above (6) of the present invention, the second sound passage portion has a first connection end portion connected to the first sound passage portion and a second connection portion connected to the cover portion. The second connecting end has an outer diameter larger than the outer diameter of the first connecting end, and the second sound passage part is from the first connecting end to the second connecting end. By gradually increasing the diameter as it gets closer, the following effects are obtained.
When using the earpiece, the first sound passage part can be inserted into the inner part of the ear canal, and the second sound passage part can be interposed in a wide range near the entrance of the ear canal, so that the intrusion of external noise can be suppressed. ..

According to the full-cover type earpiece according to the above (7) of the present invention, the covering portion is formed in the vicinity of the outer periphery of the case so as to be connected to the sound communication cylinder, and in the portion opposite to the sound communication cylinder. The following effects are obtained by forming a convex curved shape toward the side opposite to the case and providing a tragus contact portion for contacting the tragus.
When using the earpiece, the tragus contact portion can be easily brought into contact with the tragus in a wide range, so that it can be easily fixed to the tragus portion in shape and the wearing stability can be improved. For example, when the earpiece is made of an elastic material, the pressure on the ear is suppressed and the earpiece is not slippery, so that the wearing stability can be further improved.

According to the full-cover type earpiece according to the above (8) of the present invention, the covering portion is formed on the side opposite to the tragus contact portion with the case sandwiched therein, and is curved toward the side opposite to the case. The following effects are obtained by further providing an ear condyle contact portion for contacting the tragus connected to the tragus while bulging in a shape.
When the earpiece is used, the tragus contact portion is brought into contact with the tragus, and the tragus contact portion is easily brought into contact with the tragus over a wide range, so that the wearing stability can be further improved.

According to the full-cover type earpiece according to the above (9) of the present invention, the length of the long axis of the covering portion having a substantially oval shape when viewed from the direction along the axis is 15.5 mm or more and 17.5 mm or less. By being, the following effects are obtained.
The mounting stability can be further improved as compared with the case where the length of the long axis of the covering portion having a substantially oval shape is less than 15.5 mm or more than 17.5 mm. In addition, since it fits the size of a general concha cavity, the gap in the concha cavity can be made as small as possible. Therefore, the earpiece is difficult to come out from the ear canal, and the sealed state can be maintained.

According to the full-cover type earpiece according to the above (10) of the present invention, the covering portion, the sound passage cylinder and the annular convex portion are integrally formed of the same elastic material, thereby achieving the following effects. ..
When the earpiece is used, the earpiece can be elastically deformed to follow the shape of the tragus, the tragus, and the tragus, so that the wearing stability can be further improved. In addition, the production efficiency of the earpiece can be improved as compared with the case where the covering portion, the sound passage cylinder and the annular convex portion are formed separately.

According to the full-cover type earpiece according to the above (11) of the present invention, the elastic material is silicone rubber, so that the following effects can be obtained.
Silicone rubber is suitable as an elastic material because it is excellent in biocompatibility, heat resistance, chemical resistance, water repellency, electrical insulation and the like.

According to the earphone according to the above (12) of the present invention, there is a speaker having a vibrating membrane and a yoke supporting the vibrating membrane, and sounding by vibration of the vibrating membrane, and a case for accommodating the speaker. By providing the above-mentioned full-cover type earpiece, the following effects are obtained.
It is possible to provide earphones that can improve wearing stability. In addition, noise transmitted from the cord can be reduced and sound leakage can be suppressed.

According to the earphone according to the above (13) of the present invention, the case has an inner case located on the inner peripheral side of the case and an outer peripheral portion of the inner case so as to be rotatable relative to the inner case around an axis. By providing a supporting outer case, the following effects can be obtained.
Since the inner case and the outer case can be rotated at an arbitrary angle, the cord outlet portion provided on the case can be set at an arbitrary angle. Therefore, it is possible to correspond to any usage method such as putting out the cord downward with respect to the user's ear or hanging it on the earlobe. In addition, it is possible to deal with individual differences in the shape of the ear. For example, when the cord is used by hanging it on the earlobe, it is known that the vibration noise of the cord is significantly reduced in both the vertical direction and the horizontal direction, but the usability may be deteriorated. In this way, it can be easily used properly according to the preference of the user.

According to the earphone according to the above (14) of the present invention, the case has a tubular shape that protrudes from the portion of the case facing the vibrating membrane toward the side opposite to the yoke of the vibrating membrane. By providing a stem that supports the base end portion of the sound passage cylinder, the following effects can be obtained.
Since the stem can firmly support the base end of the sound communication cylinder, it is possible to prevent the base end of the sound communication cylinder from bending when the earpiece is attached to the ear. Therefore, the mounting stability can be further improved.

According to the earphone according to the above (15) of the present invention, the full-cover type earpiece has an opening for being detachably attached to the case, and the opening is the case when viewed from the direction along the axis. By being smaller than the outer shape of, the following effects are obtained.
Since the opening of the earpiece and the case are in close contact with each other, it is possible to suppress the formation of a gap that causes sound leakage.

It is a perspective view of the earphone which concerns on 1st Embodiment. It is a rear view of the earphone which concerns on 1st Embodiment. It is a 1st side view of the earphone which concerns on 1st Embodiment. It is a 2nd side view of the earphone which concerns on 1st Embodiment. It is a VV cross-sectional view of FIG. FIG. 2 is a sectional view taken along line VI-VI of FIG. FIG. 5 is a sectional view taken along line VII-VII of FIG. It is a side view of the earpiece which concerns on 1st Embodiment. It is a rear view of the earpiece which concerns on 1st Embodiment. It is a perspective view of the stem which concerns on 1st Embodiment. It is explanatory drawing of the use state of the earphone which concerns on 1st Embodiment. It is explanatory drawing of the use state of the earphone which concerns on a comparative example. It is sectional drawing corresponding to FIG. 7 of the sound passage cylinder which concerns on the modification of 1st Embodiment. It is sectional drawing which corresponds to FIG. 5 of the earphone which concerns on 2nd Embodiment. It is explanatory drawing of the rotation operation of the outer case which concerns on 2nd Embodiment. It is a figure which shows an example of the state which the earphone which concerns on 2nd Embodiment is attached to the left ear. It is a figure which shows another example of the state which the earphone which concerns on 2nd Embodiment is attached to the left ear.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same reference numerals are given to the same configurations. In the embodiment, a canal type earphone used by inserting the earphone into the ear canal of the user's ear will be described. Hereinafter, the canal type earphone is also simply referred to as an "earphone". In the embodiment, the earphone for the left ear will be described.

<First Embodiment>
<Whole earphone>
FIG. 1 is a perspective view of the earphone according to the first embodiment. FIG. 2 is a rear view of the earphone according to the first embodiment. FIG. 3 is a first side view of the earphone according to the first embodiment. FIG. 4 is a second side view of the earphone according to the first embodiment. FIG. 5 is a sectional view taken along line VV of FIG. FIG. 6 is a sectional view taken along line VI-VI of FIG.
As shown in FIG. 1, the earphone 1 includes a speaker 2 (see FIG. 6), a case 3 for accommodating the speaker 2, a holding cylinder 4 for holding the cord 40, and an earpiece 5 (full-cover type earpiece). To be equipped with.

<Speaker>
As shown in FIG. 6, the speaker 2 includes a vibrating film 9 and a yoke 10 that supports the vibrating film 9. The speaker 2 sounds by the vibration of the vibrating membrane 9. For example, the minimum resonance frequency (f ₀ ) of a single speaker is set to 400 Hz or higher.
The yoke 10 has a cup shape having a cylindrical wall portion 11. Hereinafter, the direction along the axis C1 of the yoke 10 is referred to as the “axial direction”, the direction orthogonal to the axis C1 is referred to as the “diameter direction”, and the direction around the axis C1 is referred to as the “circumferential direction”.

For example, the yoke 10 is made of a magnetic material. The yoke 10 includes a cylinder wall portion 11, a flange portion 12, and a bottom portion 13.
The flange portion 12 is connected to the first end portion (open end portion) of the cylinder wall portion 11. The flange portion 12 has an annular shape larger than the outer diameter of the tubular wall portion 11. The flange portion 12 is provided coaxially with the cylinder wall portion 11. The outer peripheral edge portion of the flange portion 12 is offset in a direction away from the first end portion of the tubular wall portion 11.
The bottom portion 13 is connected to the second end portion (the end portion on the side opposite to the open end portion in the axial direction) of the cylinder wall portion 11. The bottom portion 13 has a through hole 13a provided coaxially with the cylinder wall portion 11.

For example, the vibrating membrane 9 is made of a film material having an insulating property. The vibrating membrane 9 has a disk shape larger than the outer diameter of the tubular wall portion 11. The central portion 9a of the vibrating membrane 9 bulges in a dome shape. The outer peripheral portion 9b of the vibrating membrane 9 bulges smaller than the central portion 9a. The vibrating film 9 covers the yoke 10 via a space. The outer peripheral edge portion of the vibrating film 9 is adhered to the flange portion 12 of the yoke 10 over the entire circumference. Reference numeral 9c in the figure indicates an annular boundary portion located between the central portion 9a and the outer peripheral portion 9b in the vibrating membrane 9.

The speaker 2 further includes a magnet 14 and a coil 15.
The magnet 14 is housed in the yoke 10. The magnet 14 has a cylindrical shape coaxial with the tubular wall portion 11. The magnet 14 has a hollow portion 14a having substantially the same size as the through hole 13a of the bottom portion 13. The magnet 14 is arranged on the first surface of the bottom portion 13 so that the hollow portion 14a is aligned with the through hole 13a of the bottom portion 13. The magnet 14 extends from the first surface of the bottom portion 13 to the first end portion of the cylinder wall portion 11.

The coil 15 is formed by winding a conducting wire in a cylindrical shape and integrating it. The coil 15 is fixed to the second surface (the surface facing the yoke 10) of the vibrating membrane 9. Seen from the axial direction, the coil 15 overlaps the boundary portion 9c of the vibrating membrane 9. The coil 15 is arranged so as to surround the central portion 9a of the vibrating membrane 9. The coil 15 faces the cylinder wall portion 11 of the yoke 10 and the magnet 14 in the radial direction at intervals.
A lead wire (not shown) is drawn from the coil 15. The lead wire is connected to the terminal portion 16 on the second surface side of the bottom portion 13 via the hollow portion 14a of the magnet 14.

<Case>
The case 3 includes a first cover 20 that covers the speaker 2 from the side of the vibrating membrane 9, and a second cover 30 that covers the speaker 2 from the side of the yoke 10. For example, the case 3 (first cover 20 and second cover 30) is made of synthetic resin.

The first cover 20 has a circular outer edge when viewed from the axial direction (see FIG. 10). The first cover 20 is formed flat as a whole. The first cover 20 has a dome shape that covers the speaker 2 from the radial outside of the yoke 10 to the side of the vibrating film 9 opposite to the yoke 10. For example, the first cover 20 is fixed to the second cover 30 with an adhesive or the like.

As shown in FIG. 5, the first cover 20 has a cover main body 21 that covers the entire outer circumference of the speaker 2 from the radial outside, and a portion of the cover main body 21 that faces the vibrating film 9 and is opposite to the yoke 10 of the vibrating film 9. A tubular stem 22 projecting toward the side and an annular portion 23 forming an annular shape protruding from the inner circumference of the cover body 21 toward the side opposite to the vibrating film 9 of the yoke 10 are provided. The cover body 21, the stem 22, and the annular portion 23 are integrally formed of the same synthetic resin.

The cover main body 21 is connected to the annular portion 23 so as to form a step portion 24 with the annular portion 23. The step portion 24 is formed over the entire circumference of the cover main body 21.
The stem 22 supports the base of the sound transmission tube 60. The stem 22 is in contact with the inner surface of the base of the sound transmission tube 60. The stem 22 is formed in the vicinity of the outer edge of the vibrating membrane 9 in the case 3. The stem 22 projects obliquely toward the outside of the case 3 so as to intersect the axis C1. The stem 22 has a sound passage hole 22a that communicates with the inside and outside of the case 3. The diameter of the stem 22 is gradually reduced as the distance from the cover body 21 increases.
The annular portion 23 supports the outer peripheral portion of the speaker 2. The annular portion 23 has a perfect circular outer edge that is smaller than the cover body 21 when viewed in the axial direction. The protruding end of the annular portion 23 is located near the center of the yoke 10 in the axial direction (see FIG. 6).

The second cover 30 has a bottomed tubular shape extending from the radial outside of the yoke 10 toward the side opposite to the vibrating film 9 of the yoke 10. The second cover 30 has a perfect circular outer edge that is smaller than the sound-transmitting side cover 20 when viewed from the axial direction (see FIG. 2).

As shown in FIG. 6, the second cover 30 is inserted with a yoke accommodating portion 31 accommodating the yoke 10, a cylinder base accommodating portion 32 accommodating the base 39 of the holding cylinder 4, and the holding cylinder 4. It has a tubular body insertion hole 33 and a braking hole 34 for releasing the back pressure of the speaker 2. The yoke accommodating portion 31 and the tubular base accommodating portion 32 are integrally formed of the same synthetic resin.
For example, from the viewpoint of summarizing the acoustic characteristics, when the braking hole 34 is open, the through hole 13a of the bottom 13 of the yoke 10 is closed by the acoustic braking member.

The yoke accommodating portion 31 is arranged near the first end portion of the second cover 30. The yoke accommodating portion 31 has an annular recess 31a for attaching the annular portion 23 of the first cover 20. The annular recess 31a is formed over the entire outer circumference of the first end of the yoke housing portion 31. The depth (diametrical length) of the annular recess 31a is substantially the same as the thickness (diametrical length) of the annular portion 23. In the mounted state of the first cover 20 and the second cover 30, the outer peripheral surface of the annular portion 23 and the outer peripheral surface of the yoke accommodating portion 31 (the outermost outer peripheral surface excluding the annular recess 31a) are substantially the same radial position. It is in.

The tubular body base accommodating portion 32 is arranged near the second end portion of the second cover 30.
A wiring 41 for supplying an audio signal is routed between the yoke accommodating portion 31 and the tubular body base accommodating portion 32 in the axial direction. The tubular body base accommodating portion 32 has a perfect circular outer edge that is smaller than the yoke accommodating portion 31 when viewed in the axial direction (see FIG. 2).

<Holding cylinder>
As shown in FIG. 6, the holding cylinder 4 is coupled to the second cover 30. The holding cylinder 4 extends in a direction substantially orthogonal to the axis C1 of the yoke 10 (downward on the paper surface in FIG. 6). A cord 40 connected to an electronic device (not shown) is inserted through the holding cylinder 4. The cord 40 has a knot 40a formed in the base 39 of the holding cylinder 4 to prevent it from coming off. The code 40 has a built-in wiring 41 for supplying an audio signal to the speaker 2. The wiring 41 is connected to the terminal portion 16 on the second surface side of the bottom portion 13.

For example, when an audio signal is supplied from an electronic device via a cord 40, the audio signal is supplied to the coil 15 via a lead wire. Then, the vibrating film 9 vibrates due to the displacement of the coil 15. As a result, the speaker 2 sounds. The sound produced by the speaker 2 is propagated to the ear canal 100 in the user's ear through the sound passage hole 60a (see FIG. 5) (see FIG. 11).

<Earpiece>
The earpiece 5 is made of an elastic material. For example, the earpiece 5 is made of silicone rubber. The earpiece 5 has a lower rigidity than the case 3. The earpiece 5 is a full-cover type earpiece that covers the entire outer circumference of the case 3.

As shown in FIG. 5, the earpiece 5 includes a covering portion 50 that covers the case 3, a sound passage tube 60 that protrudes from one of the covering portions 50, an annular convex portion 70 that protrudes from the other of the covering portion 50, and sound. A folded-back portion 80 that is folded back from the tip end portion of the through-cylinder body 60 is provided. The covering portion 50, the sound passage cylinder 60, the annular convex portion 70, and the folded portion 80 are integrally formed of the same elastic material (for example, silicone rubber) (see FIG. 8).

The covering portion 50 covers the entire outer circumference of the case 3 from the outside in the radial direction. The cover portion 50 has a dome shape that covers the case 3 from the radial outside of the case 3 (cover body 21) to the side opposite to the yoke 10 of the vibrating film 9. The covering portion 50 has an oval-shaped outer edge when viewed from the axial direction (see FIG. 2). In the used state in which the sound passage body 60 is inserted into the user's ear canal 100, the covering portion 50 has an oval shape extending from the tragus 102 facing the user's concha cavity 101 toward the tragus 103. (See FIG. 11). For example, the length H1 of the long axis of the covering portion 50 (see FIG. 2) is set to 15.5 mm or more and 17.5 mm or less. In the present embodiment, the length H1 of the long axis of the covering portion 50 is 16.5 mm.

The covering portion 50 is formed on the tragus contact portion 51 for contacting the tragus 102 facing the user's tragus cavity 101 and the tragus 104 connected to the pair 103 facing the tragus 101. It is provided with a tragus contact portion 52 for contacting (see FIG. 11). The cover portion 50 is formed so that the wall thickness (the radial thickness of the cover portion 50) is larger at the tragus contact portion 52 than at the tragus contact portion 51.

The tragus contact portion 51 is formed in the vicinity of the outer periphery of the case 3 (cover main body 21) so as to be connected to the sound transmission cylinder 60. The tragus contact portion 51 has a curved shape that is convex toward the side opposite to the case 3 at a portion opposite to the sound passage cylinder 60 in the axial direction.
The tragus contact portion 52 is formed on the side opposite to the tragus contact portion 51 with the case 3 interposed therebetween. The abdominal condyle contact portion 52 bulges in a convex curved shape toward the side opposite to the case 3.

The sound transmission tubular body 60 has a tubular shape that protrudes from a portion of the cover portion 50 facing the vibrating membrane 9 (specifically, a portion facing the cover body 21) toward the side opposite to the yoke 10 of the vibrating membrane 9. I'm doing it. The sound tube body 60 has a function of propagating the sound produced by the speaker 2 to the ear canal 100 in the user's ear (see FIG. 11).

The sound transmission cylinder 60 includes a first sound communication portion 61 to which the folding portion 80 is connected, a portion of the covering portion 50 facing the vibrating film 9 (specifically, a portion facing the cover main body 21), and a folding portion 80. A second sound communication part 62 that connects the first sound communication part 61 and the cover part 50 so as to separate from each other is provided. The first sound communication part 61 and the second sound communication part 62 are integrally formed of the same member.

The first sound passage portion 61 has a cylindrical shape. The first sound communication portion 61 has a perfect circular shape in a cross-sectional view orthogonal to the extending direction of the first sound communication portion 61 (axis line C2 of the sound communication cylinder 60) (see FIG. 7). The outer diameter D1 of the first sound passage portion 61 is less than 6 mm. The shaft length L1 of the first sound communication portion 61 is 6 mm or more. The ratio D1 / L1 of the outer diameter D1 of the first sound communication portion 61 to the shaft length L1 is less than 1. For example, in the case of S size, the outer diameter D1 of the first sound passage portion 61 is set to 4.8 mm, the shaft length L1 is set to 9.4 mm, and the ratio D1 / L1 is set to 0.51. For example, in the case of the XS size, the outer diameter D1 of the first sound passage portion 61 is set to 4.8 mm, the shaft length L1 is set to 8.7 mm, and the ratio D1 / L1 is set to 0.55.

The second sound communication portion 62 includes a first connection end portion 62a connected to the first sound communication portion 61 and a second connection end portion 62b connected to the cover portion 50. The second connecting end 62b has an outer diameter larger than the outer diameter of the first connecting end 62a. The diameter of the second sound communication portion 62 is gradually increased as it approaches the second connecting end portion 62b from the first connecting end portion 62a. The second sound communication portion 62 has a tapered shape that is inclined so as to approach the axis C1 of the yoke 10 as it approaches the second connecting end portion 62b from the first connecting end portion 62a.

The sound passage cylinder 60 is formed in the earpiece 5 so as to overlap the half body of the vibrating membrane 9 in the axial direction. The sound transmission cylinder 60 projects obliquely toward the outside of the earpiece 5 so as to intersect the axis C1 of the yoke 10. The sound communication cylinder 60 is formed with a sound communication hole 60a that communicates the internal space and the external space of the earpiece 5.

In the used state in which the sound communication tube 60 is inserted into the ear canal 100, the sound communication tube 60 is offset toward the tragus 102 with respect to the portion C10 overlapping the earphone 1 on the axis C1 of the yoke 10 (see FIG. 11). ). The portion C10 that overlaps with the earphone 1 on the axis C1 of the yoke 10 means a portion between the tip of the covering portion 50 and the base end of the second cover 30 on the axis C1. The sound tube 60 extends inclined from the tragus 102 toward the ear canal 100 (see FIG. 11).

Let A be the angle formed by the axis C2 of the sound tube 60 and the axis C1 of the yoke 10 in the direction in which the sound tube 60 extends inclined from the tragus 102 toward the ear canal 100. For example, the angle A is set to 2 degrees or more and 12 degrees or less. In this embodiment, the angle A is about 7 degrees.

The annular convex portion 70 has an annular shape that projects from the inner circumference of the covering portion 50 toward the side opposite to the vibrating film 9 of the yoke 10 so as to support the outer peripheral portion of the case 3. When viewed from the side opposite to the vibrating film 9 (the portion supporting the vibrating film 9) of the yoke 10 in the axial direction (hereinafter, also referred to as “rear view”), the annular convex portion 70 has a perfect circular shape smaller than the covering portion 50. Has an outer edge of (see FIG. 2).

The annular convex portion 70 has an opening 71 for being detachably attached to the case 3. Seen from the axial direction, the opening 71 is smaller than the outer shape of the case 3 (cover body 21). The opening 71 has a size such that the first cover 20 can be inserted into the covering portion 50 and the first cover 20 can be taken out from the covering portion 50 by elastic deformation of the earpiece 5. The protruding end of the annular convex portion 70 is located in the vicinity of the axial end portion of the yoke accommodating portion 31 of the second cover 30 (the portion closer to the tubular body base accommodating portion 32).

The folded-back portion 80 is folded back from the tip end portion of the sound transmission cylinder 60 toward the covering portion 50. The folded portion 80 has a tulip shape that can be inserted into the ear canal 100. The folded-back portion 80 approaches the first cylinder portion 81 whose diameter gradually increases as it approaches the cover portion 50 from the tip portion of the sound transmission cylinder 60, and the cover portion 50 from the end portion on the cover portion 50 side of the first cylinder portion 81. A second tubular portion 82 whose diameter is gradually reduced according to the above is provided.

<Action>
Hereinafter, the operation of the earphone 1 of the present embodiment will be described.
FIG. 11 is an explanatory diagram of a usage state of the earphone 1 according to the first embodiment. FIG. 12 is an explanatory diagram of a usage state of the earphone 1X according to the comparative example.
First, a comparative example will be described.
As shown in FIG. 12, the earphone 1X according to the comparative example has a vibrating membrane 9X in the tragus 104 surrounded by the user's tragus 102, tragus 103, and tragus 104. It has a configuration in which the case 3X is inserted so as to be close to the earphone. In the comparative example, the sound tube 4X is inserted into the ear canal 100 extending from the concha cavity 101 to the eardrum so as to project obliquely with respect to the axis of the yoke 10X. A flexible ear tip 7X is fitted in the sound transmission tube 4X. The ear tip 7X elastically contacts the inner wall of the ear canal 100. Case 3X is in direct contact with the ear.

Next, this embodiment will be described with reference to FIG.
In the present embodiment, the covering portion 50 covers the entire outer circumference of the case 3 (the portion excluding the second cover 30), so that when the earphone 1 is used (when the earphone 1 is attached to the ear), the case 3 is placed on the ear. The earpiece 5, which is less rigid than the case 3, comes into contact with the ear without touching it directly. Therefore, the ear contact of the earphone 1 can be made softer than that of the comparative example. In addition, since the covering portion 50 has an oval shape extending from the tragus 102 toward the tragus 103 in the used state, it can be matched to the shape of a general tragus cavity 101, and the long axis of the covering portion 50. It is easy to support the end portion on the tragus 102 side and the tragus 103 side.
In addition, when the earphone 1 is used, the sound passage tube 60 can be inserted into the depth of the ear canal 100 by the length of the second sound communication portion 62. Therefore, the folded-back portion 80 can be brought into contact with the ear canal 100 at a deeper portion than in the comparative example.
Further, in the present embodiment, when the earphone 1 is used, the step portion 53 of the tragus contact portion 51 can be suppressed by the tragus 102. Therefore, the earphone 1 can be made more difficult to come off than in the comparative example.

As described above, the earpiece 5 in the above embodiment covers the entire outer periphery of the case 3 accommodating the speaker 2 having the yoke 10 supporting the vibrating film 9 from the outside in the direction orthogonal to the axis C1 of the yoke 10. A covering portion 50 having an oval shape extending from the ear bead 102 facing the user's concha cavity 101 toward the anti-bead 103 when viewed from the direction along the axis C1 in the used state, and a vibrating film 9 in the covering portion 50. A sound tube for propagating the sound produced by the speaker 2 to the external auditory canal 100 in the user's ear while forming a tubular shape that protrudes from the portion facing the vibration film 9 toward the side opposite to the yoke 10. 60, and an annular convex portion 70 forming an annular shape that projects from the inner circumference of the covering portion 50 so as to support the outer peripheral portion of the case 3 toward the side opposite to the vibrating film 9 of the yoke 10.
According to this configuration, since the entire outer circumference of the case 3 is covered by the covering portion 50, when the earpiece 5 is used (when the earpiece 5 is attached to the ear), the earpiece 5 feels soft against the ear. In addition, since the covering portion 50 has an oval shape extending from the tragus 102 toward the pair of beads 103 in the used state, the long axis end of the covering portion 50 can be easily supported by the tragus 102 side and the pair of beads 103 side. .. Therefore, the mounting stability can be improved.
In addition, the vertical vibration noise of the cord 40 (noise generated by rubbing the cord 40 in the longitudinal direction) and the horizontal vibration noise of the cord 40 (noise generated by shaking the cord 40 and hitting clothes or the like) are generated. Including, the noise transmitted from the code 40 can be reduced by about 6 to 12 dB (1/2 to 1/4).
In addition, the following effects can be obtained by providing an annular convex portion 70 that can support the outer peripheral portion of the case 3 and protrudes from the inner circumference of the covering portion 50 toward the side opposite to the vibrating film 9 of the yoke 10. Play.
Since the entire outer circumference of the case 3 is supported by the annular convex portion 70, it is possible to suppress the formation of a gap between the case 3 and the annular convex portion 70, and it is possible to suppress sound leakage.
In addition, the oval shape of the covering portion may be slightly more advantageous than the elliptical shape in terms of mounting stability.

In the above embodiment, the folded-back portion 80 is provided, which is folded back from the tip end portion of the sound transmission cylinder 60 toward the covering portion 50, and the folded-back portion 80 has a tulip-shaped shape that can be inserted into the ear canal 100. Play the effect of.
When the earpiece 5 is used, the folded-back portion 80 flexibly contacts the ear, so that the wearing stability can be further improved. In addition, since the ear canal 100 is blocked by the folded-back portion 80, the ear canal 100 can be sealed from the space outside the ear.

In the above embodiment, the sound passage cylinder 60 has a first sound so as to be separated from the first sound communication portion 61 to which the folded portion 80 is connected, the portion of the covering portion 50 facing the vibrating film 9, and the folded portion 80. By providing the second sound passage portion 62 that connects the passage portion 61 and the cover portion 50, the following effects can be obtained.
When a force is applied to the sound transmission tube in the direction of removal, the operating point (the point where the force acts) and the fixed point (the base end of the sound communication tube) are close to each other, and the earpiece tends to come off easily. It is in. On the other hand, according to this configuration, since the distance between the operating point and the fixed point is long by the length of the second sound passage portion 62, the earpiece 5 can be made difficult to come off. In addition, when the earpiece 5 is used, the first sound passage portion 61 can be inserted into the depth of the ear canal 100 by the length of the second sound passage portion 62, so that the intrusion of external noise can be suppressed.

In the above embodiment, the first sound passage portion 61 has a cylindrical shape, the outer diameter D1 of the first sound passage portion 61 is less than 6 mm, and the shaft length L1 of the first sound passage portion 61 is 6 mm or more. When the ratio D1 / L1 of the outer diameter D1 and the shaft length L1 is less than 1, the following effects are obtained.
Compared with the case where the outer diameter of the first sound passage portion 61 is 6 mm or more, the first sound passage portion 61 can be easily inserted into the ear canal 100. In addition, the flexibility when inserting the first sound passage portion 61 into the ear canal 100 can be increased as compared with the case where the axial length of the first sound passage portion 61 is less than 6 mm. In addition, the ease and flexibility of inserting the first sound passage portion 61 into the ear canal 100 can be enhanced as compared with the case where the ratio D1 / L1 is 1 or more. In addition, it is effective in reducing pain due to a feeling of pressure on the ear canal 100 when used for a long time.

In the above embodiment, the second sound communication portion 62 includes a first connection end portion 62a connected to the first sound communication portion 61 and a second connection end portion 62b connected to the cover portion 50. The two connecting ends 62b have an outer diameter larger than the outer diameter of the first connecting end 62a, and the second sound communication portion 62 gradually approaches the second connecting end 62b from the first connecting end 62a. By increasing the diameter, the following effects are achieved.
When the earpiece 5 is used, the first sound passage portion 61 can be inserted into the depth of the ear canal 100, and the second sound passage portion 62 can be interposed in a wide range near the entrance of the ear canal 100, so that external noise can be prevented from entering. It can be suppressed.

In the above embodiment, the covering portion 50 is formed in the vicinity of the outer periphery of the case 3 so as to be connected to the sound communication cylinder 60, and in the portion opposite to the sound communication cylinder 60, toward the side opposite to the case 3. By forming a convex curved shape and providing the tragus contact portion 51 for contacting the tragus 102, the following effects can be obtained.
When the earpiece 5 is used, the tragus contact portion 51 can be easily brought into contact with the tragus 102 in a wide range, so that it can be easily fixed to the tragus portion in shape and the wearing stability can be improved. For example, when the earpiece 5 is made of an elastic material, the pressure on the ear is suppressed and the earpiece 5 is not slippery, so that the wearing stability can be further improved.

In the above embodiment, the covering portion 50 is formed on the side opposite to the tragus contact portion 51 with the case 3 interposed therebetween, and bulges in a convex curved shape toward the opposite side to the case 3. The following effects are obtained by further providing the tragus contact portion 52 for contacting the tragus 104 connected to the tragus 103.
When the earpiece 5 is used, the tragus contact portion 51 is brought into contact with the tragus 102, and the tragus contact portion 52 is easily brought into contact with the tragus 104 in a wide range, so that the wearing stability is further improved. be able to.

In the above embodiment, the length H1 of the long axis of the covering portion 50 having a substantially elliptical shape when viewed from the direction along the axis C1 is 15.5 mm or more and 17.5 mm or less, thereby achieving the following effects. ..
The mounting stability can be further improved as compared with the case where the length H1 of the long axis of the covering portion 50 having a substantially oval shape is less than 15.5 mm or more than 17.5 mm. In addition, since it fits the size of a general concha cavity 101, the gap of the concha cavity 101 can be made as small as possible. Therefore, the earpiece 5 is less likely to come out of the ear canal 100, and the sealed state can be maintained.

In the above embodiment, the covering portion 50, the sound passage cylinder 60, and the annular convex portion 70 are integrally formed of the same elastic material, thereby achieving the following effects.
When the earpiece 5 is used, the earpiece 5 can be elastically deformed so as to follow the shapes of the tragus 102, the tragus 103, and the tragus 104, so that the wearing stability can be further improved. In addition, the manufacturing efficiency of the earpiece 5 can be improved as compared with the case where the covering portion 50, the sound passage cylinder 60 and the annular convex portion 70 are separately formed.

In the above embodiment, the elastic material is silicone rubber, which has the following effects.
Silicone rubber is suitable as an elastic material because it is excellent in biocompatibility, heat resistance, chemical resistance, water repellency, electrical insulation and the like.

The earphone 1 in the above embodiment has a vibrating film 9, a yoke 10 that supports the vibrating film 9, a speaker 2 that emits sound by vibration of the vibrating film 9, a case 3 that houses the speaker 2, and the above. The earpiece 5 is provided.
According to this configuration, it is possible to provide the earphone 1 capable of improving the wearing stability. In addition, noise transmitted from the cord 40 can be reduced and sound leakage can be suppressed.

In the above embodiment, the case 3 has a tubular shape that protrudes from the portion of the case 3 facing the vibrating membrane 9 toward the side opposite to the yoke 10 of the vibrating membrane 9, and the base end portion of the sound transmission tubular body 60. By providing the stem 22 that supports the above, the following effects are obtained.
Since the stem 22 can firmly support the base end portion of the sound communication cylinder 60, it is possible to prevent the base end portion of the sound communication cylinder 60 from bending when the earpiece 5 is attached to the ear. Therefore, the mounting stability can be further improved.

In the above embodiment, the earpiece 5 has an opening 71 for being detachably attached to the case 3, and the opening 71 is smaller than the outer shape of the case 3 when viewed from the direction along the axis C1. It has the following effects.
Since the opening 71 of the earpiece 5 and the case 3 are in close contact with each other, it is possible to suppress the formation of a gap that causes sound leakage.

<Modification example>
In the above embodiment, there is an example in which the covering portion 50 has an oval shape extending from the tragus 102 facing the tragus cavity 101 of the user toward the tragus 103 when viewed from the direction along the axis C1 in the used state. However, it is not limited to this. For example, the covering portion 50 may have an elliptical shape extending from the tragus 102 facing the tragus cavity 101 of the user toward the pair 103 when viewed from the direction along the axis C1 in the used state.

In the above embodiment, an example in which the entire earpiece 5 is made of an elastic material has been described, but the present invention is not limited to this. For example, a part of the earpiece 5 (only the portion in contact with the ear) such as the surface of the earpiece 5 may be formed of an elastic material.

In the above embodiment, an example in which the elastic material is silicone rubber has been described, but the present invention is not limited to this. For example, the elastic material may be rubber other than silicone rubber such as urethane rubber and fluororubber.

In the above embodiment, an example in which the folded-back portion 80 is integrally formed of the same elastic material as the sound transmission cylinder 60 has been described, but the present invention is not limited to this. For example, the folded-back portion 80 may be detachably attached to the sound transmission cylinder 60 as an ear tip.

In the above embodiment, an example in which the earpiece 5 is detachably attached to the case 3 has been described, but the present invention is not limited to this. For example, the earpiece 5 may be fixed to the case 3 with an adhesive or the like.

In the above embodiment, the sound communication cylinder 60 has been described with an example of including the first sound communication part 61 and the second sound communication part 62, but the present invention is not limited to this. For example, when the sound communication cylinder is shortened for a person with small ears, the sound communication cylinder 60 does not have to have the second sound communication portion 62.

In the above embodiment, the stem 22 has been described by giving an example in which the diameter is gradually reduced as the distance from the cover body 21 is increased, but the present invention is not limited to this. For example, the stem 22 does not have to be gradually reduced in diameter from the viewpoint of firmly supporting the base of the sound transmission tube 60. For example, the case 3 does not have to have the stem 22 when the sound tube is shortened for people with small ears.

In the above embodiment, the earphone 1 for the left ear has been described, but the present invention is not limited to this. The present invention can also be applied to earphones for the right ear. For example, the earphone for the left ear and the earphone for the right ear can be supported by forming a symmetrical structure (parts with different left and right hands).

In the above embodiment, an example (see FIG. 7) in which the first sound passage portion 61 has a perfect circular shape in a cross-sectional view orthogonal to the extending direction of the first sound communication portion 61 has been described, but the present invention is not limited to this. .. For example, as shown in FIG. 13, the first sound communication portion 161 may have an elliptical shape in a cross-sectional view orthogonal to the extending direction of the first sound communication portion 161. The major axis direction of the first sound communication portion 161 having an elliptical shape is substantially orthogonal to the major axis direction of the covering portion 50 having an elliptical shape. The cross-sectional area of the first sound passage portion 161 having an elliptical shape is less than 28.3 mm ² . For example, the folded-back portion 180 may have an elliptical shape in a cross-sectional view orthogonal to the extending direction of the first sound communication portion 161. The major axis direction of the folded portion 180 having an elliptical shape is substantially parallel to the major axis direction of the first sound communication portion 161 having an elliptical shape.
According to this configuration, the mounting stability can be further improved as compared with the case where the first sound passage portion 61 has a perfect circular shape in a cross-sectional view. When the first sound passage portion 161 has an elliptical shape in a cross-sectional view, it fits the shape of a general ear canal 100, so that the feeling of pressure on the ear canal 100 can be reduced.
When the first sound passage portion 61 has an elliptical shape in a cross-sectional view, the above-mentioned cross-sectional area of less than 28.3 mm ² is prioritized, and the diameter of the ellipse may be 6 mm or more.

<Second Embodiment>
In the first embodiment, the case 3 includes a first cover 20 that covers the speaker 2 from the side of the vibrating membrane 9, and a second cover 30 that covers the speaker 2 from the side of the yoke 10. Although the case where the cover 30 and the cover 30 are fixed has been described, the present invention is not limited to this. In the second embodiment, the configuration of the case is different from that of the first embodiment. In the second embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 14 is a cross-sectional view corresponding to FIG. 5 of the earphone according to the second embodiment.
As shown in FIG. 14, the case 203 includes a first cover 220 that covers the speaker 2 from the side of the vibrating membrane 9, and a second cover 30 that covers the speaker 2 from the side of the yoke 10. The first cover 220 includes an inner case 221 located on the inner peripheral side of the case 203, and an outer case 222 that supports the outer peripheral portion of the inner case 221 so as to be rotatable relative to the inner case 221 around the axis C1. To be equipped.

The inner case 221 has a tubular inner cylinder 221a that supports the outer peripheral portion of the speaker 2, and an annular flange portion 221b that protrudes radially outward from the end portion of the inner cylinder 221a opposite to the second cover 30. And. The end of the inner cylinder 221a on the opposite side of the collar 221b is fixed to the second cover 30 with an adhesive or the like.

The outer case 222 protrudes from the outer cover body 222a that covers the entire outer circumference of the speaker 2 from the outside in the radial direction and the portion of the outer cover body 222a that faces the vibrating film 9 toward the side opposite to the yoke 10 of the vibrating film 9. It is provided with a tubular stem 222b. A recess 222c is formed in the inner peripheral portion of the outer cover body 222a to rotatably support the flange portion 221b around the axis C1.

With such a configuration, the second cover 30 can rotate relative to the outer case 222 with respect to the axis C1 via the inner case 221. That is, the second cover 30 can rotate relative to the earpiece 5 along the axis C1 together with the holding cylinder 4 (see FIG. 15). FIG. 15 shows an example in which the holding cylinder 4 is rotated around the axis C1 from the position below the paper surface (dashed-dotted line) to the position on the upper left of the paper surface (solid line).

In the second embodiment, the case 203 supports the inner case 221 located on the inner peripheral side of the case 203 and the outer peripheral portion of the inner case 221 so as to be rotatable relative to the inner case 221 around the axis C1. By providing the case 222, the following effects can be obtained.
Since the inner case 221 and the outer case 222 can be rotated at an arbitrary angle, the holding cylinder 4 (cord outlet portion) provided in the case 203 can be set at an arbitrary angle. Therefore, as shown in FIGS. 16 and 17, it is possible to support any usage method such as putting out the cord 40 downward with respect to the user's ear or hanging it on the earlobe. In addition, it is possible to deal with individual differences in the shape of the ear. For example, when the cord 40 is used by hanging it on the earlobe, it is known that the vibration noise of the cord 40 is significantly reduced in both the vertical direction and the horizontal direction, but the usability may be deteriorated. In this way, it can be easily used properly according to the preference of the user.

Note that the above embodiment is presented as an example, and is not intended to limit the scope of the invention. The above-described embodiment can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the gist of the invention. The above-described embodiment and its modifications are included in the scope of the invention and the scope of the invention described in the claims as well as in the gist of the invention.

1 Earphone 2 Speaker 3 Case 5 Earpiece (Full cover type earpiece)
9 Vibrating membrane 10 York 22 Stem 50 Covering part 51 Ear bead contact part 52 Ear concha contact part 60 Sound communication tube 61 1st sound communication part 62 2nd sound communication part 62a 1st connection end 62b 2nd connection End 70 Circular convex 71 Opening 80 Folded part 100 Ear canal 101 Ear canal cavity 102 Ear beads 103 Paired beads 104 Ear condyle 161 First sound passage part 180 Folded part 203 Case 220 First cover 221 Inner case 222 Outer case C1 Axial line of yoke D1 Outer diameter of the first sound passage part H1 Length of the long axis of the covering part L1 Shaft length of the first sound passage part

Claims (15)

1. The entire outer circumference of the case accommodating the speaker having the yoke supporting the vibrating membrane is covered from the outside in the direction orthogonal to the axis of the yoke, and in the used state, it covers the tragus cavity of the user when viewed from the direction along the axis. A covering part with a substantially oval shape extending from the facing tragus toward the pair of beads,
   The covering portion has a tubular shape that protrudes from the portion facing the vibrating membrane toward the side of the vibrating membrane opposite to the yoke, and the sound produced by the speaker is propagated to the ear canal in the user's ear. For the sound tube and
   A full-cover type earpiece including an annular convex portion that projects from the inner circumference of the covering portion toward the side opposite to the vibrating film of the yoke so as to support the outer peripheral portion of the case. ..
2. Further provided with a folded portion folded back from the tip end portion of the sound transmission cylinder toward the covering portion.
   The full-cover type earpiece according to claim 1, wherein the folded portion has a tulip-shaped shape that can be inserted into the ear canal.
3. The sound tube is
   The first sound communication part to which the folded part is connected and
   The claim is characterized in that the cover portion includes a portion facing the vibrating membrane and a second sound communication portion that connects the first sound communication portion and the cover portion so as to be separated from the folded portion. The full-cover type earpiece described in 2.
4. The first sound passage portion has a cylindrical shape and has a cylindrical shape.
   The outer diameter D1 of the first sound passage portion is less than 6 mm.
   The shaft length L1 of the first sound passage portion is 6 mm or more.
   The full-cover type earpiece according to claim 3, wherein the ratio D1 / L1 of the outer diameter D1 to the shaft length L1 is less than 1.
5. The first sound passage portion has an elliptical shape in a cross-sectional view, and has an elliptical shape.
   The full-cover type earpiece according to claim 4, wherein the cross-sectional area of the first sound passage portion having an elliptical shape is less than 28.3 mm ² .
6. The second sound communication part is
   The first connecting end connected to the first sound passage part and
   A second connecting end portion connected to the covering portion is provided.
   The second connecting end has an outer diameter larger than the outer diameter of the first connecting end.
   The full cover according to any one of claims 3 to 5, wherein the second sound passage portion gradually increases in diameter as it approaches the second connecting end portion from the first connecting end portion. Formula earpiece.
7. The cover portion is formed in the vicinity of the outer periphery of the case so as to be connected to the sound passage cylinder, and in a portion on the side opposite to the sound passage cylinder, a convex curved shape is formed toward the side opposite to the case. The full-cover type earpiece according to any one of claims 1 to 6, further comprising a tragus contact portion for contacting the tragus.
8. The cover portion is formed on the side opposite to the tragus contact portion across the case, forms a convex curved shape toward the side opposite to the case, and bulges, and is connected to the pair of beads. The full-cover type earpiece according to claim 7, further comprising a tragus contact portion for contacting the tragus.
9. Any of claims 1 to 8, wherein the length of the long axis of the covering portion having a substantially oval shape when viewed from a direction along the axis is 15.5 mm or more and 17.5 mm or less. The full-cover type earpiece described in item 1.
10. The full-cover type earpiece according to any one of claims 1 to 9, wherein the covering portion, the sound passage cylinder, and the annular convex portion are integrally formed of the same elastic material.
11. The full-cover type earpiece according to claim 10, wherein the elastic material is silicone rubber.
12. A speaker having a vibrating membrane and a yoke supporting the vibrating membrane, and producing sound by the vibration of the vibrating membrane.
    A case for accommodating the speaker and
    An earphone comprising the full-cover type earpiece according to any one of claims 1 to 11.
13. The case is
    An inner case located on the inner peripheral side of the case and
    The earphone according to claim 12, further comprising an outer case that supports an outer peripheral portion of the inner case so as to be rotatable relative to the inner case around the axis.
14. The case has a tubular shape that projects from a portion of the case facing the vibrating membrane toward the side opposite to the yoke of the vibrating membrane, and has a stem that supports the base end portion of the sound-transmitting tubular body. The earphone according to claim 12 or 13, wherein the earphone is provided.
15. The full-cover type earpiece has an opening for being detachably attached to the case.
    The earphone according to any one of claims 12 to 14, wherein the opening is smaller than the outer shape of the case when viewed from a direction along the axis.

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