JP2015195444A - contact member and earphone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earphone which effectively inhibits sound leakage even when the output volume is large.SOLUTION: An earphone includes: a housing (1) having a through hole (1f) which connects the interior with the exterior of the housing; and a contact member (3) having a base part (3b) covering the through hole (1f), a protruding part (3c) protruding from the base part (3b) to the radial outer side of the housing (1), and a ventilation passage (3f) connecting a first opening part (3d1) communicating with the through hole (1f) in the base part (3b) with a second opening part (3d2) opening in the protruding part (3c).

Description

  The present invention relates to an abutting member and an earphone, and more particularly to an earphone having a main body portion mounted on an inner side of an auricle and a contact member provided on the earphone and in contact with an inner wall of the auricle in a mounted state.

Wearing the main body part inside the auricle, attaching it to the inner ear type that emits sound from the sound emitting surface of the main body part toward the external auditory canal, and attaching the main body part inside the auricle, and further There is an earphone of a type called a canal type in which a sound tube portion protruding from a main body portion is inserted into an external auditory canal together with an earpiece attached thereto.
In these earphones, the quality of the sound that the user listens to becomes better as the mounting posture of the main body portion on the pinna becomes more stable.
Specifically, the mounting posture of the main body is stable, so that the positional relationship between the ear canal and the sound emission surface is maintained in an optimal state in the inner ear type, and the sealing of the inner ear canal space by the earpiece is improved in the canal type. The listening voice quality is significantly improved.

  Therefore, in the inner ear type or canal type earphone, in order to stabilize the mounting posture of the main body part to the auricle, a contact member that protrudes to the side of the main body part and flexibly contacts the inner wall surface of the auricle is provided. What is provided is provided. One example is described in Patent Document 1, and in Patent Document 1, the auricle insert 16 corresponds to the contact member.

JP 2014-045514 A

By the way, since the earphone improves the operation efficiency of the speaker unit and makes the output sound a sound with less distortion, the space behind the speaker unit (back cavity) formed in the main body and the external space communicate with each other. In many cases, an air passage that reduces the back pressure of the speaker unit is provided.
In the earphone having an air passage, when the output sound volume is increased, the sound volume leaking to the outside from the air passage is increased, and there is a high possibility that unpleasant sound leakage that should be suppressed in a public place occurs.
In particular, in an earphone provided with an abutting member so as to obtain high-quality output sound, the posture of mounting the main body portion on the auricle is more stable, so that the speaker unit accommodated in the main body portion can be enlarged. The installation of a large speaker unit is preferable in that a large volume output with a rich bass can be achieved, but on the other hand, the possibility of sound leakage is further increased.
Therefore, in the earphone provided with the contact member, there is a demand for a device that does not cause sound leakage even when the output volume is increased.

  Therefore, the problem to be solved by the present invention is to provide an abutting member and an earphone that can satisfactorily suppress sound leakage even when the output volume is large.

In order to solve the above problems, the present invention has the following configuration. 1) The housing (1) having a through hole (1f) connecting the inside and outside is provided in the earphone (51) to be used in the auricle (E) and is used on the inner wall (Ef) of the auricle (E) during use. A contact member (3) that contacts and stabilizes the mounting posture of the earphone (51),
A base (3b) covering the through hole (1f);
A protrusion (3c) protruding radially outward of the housing (1) from the base (3b);
A ventilation path (3f) connecting the first opening (3d1) communicating with the through hole (1f) in the base (3b) and the second opening (3d2) opening in the protrusion (3c); ,
The contact member (3) is characterized by having:
2) A housing (1) having a through hole (1f) connecting the inside and the outside;
A base part (3b) formed of a material softer than the housing (1) and covering the through hole (1f), and a projecting part (3c) projecting radially outward of the housing (1) from the base part (3b) , And a ventilation path (3f) connecting the first opening (3d1) communicating with the through hole (1f) in the base (3b) and the second opening (3d2) opening in the protrusion (3c). Abutting member (3) having
It is an earphone (51) equipped with.

  According to the present invention, there is an effect that sound leakage is satisfactorily suppressed even when the output volume is large.

It is a perspective view for demonstrating the earphone 51 which is the Example of the earphone of this invention. 4 is a longitudinal sectional view for explaining an earphone 51. FIG. FIG. 6 is a rear view of the rear housing 1R of the earphone 51. It is a perspective view for demonstrating the supporter 3 which is the Example of the contact member of this invention. It is a figure for demonstrating the mounting state to the pinna E of the earphone 51. FIG. 4 is a schematic cross-sectional view for explaining the relationship between the supporter 3 and the inner wall Ef of the pinna E. FIG. It is a typical rear view for demonstrating sliding rotation with respect to the rear housing 1R of the supporter 3. FIG. It is a figure for demonstrating the other mounting | wearing state to the pinna E of the earphone 51. FIG. It is a perspective view for demonstrating the supporter 31 which is the modification 1 of the supporter 3. FIG. It is a perspective view for demonstrating the supporter 32 which is the modification 2 of the supporter 3. FIG. It is an assembly drawing of the supporter 32. FIG. It is a perspective view for demonstrating the supporter 34 which is the modification 3 of the supporter 3. FIG. It is a perspective view for demonstrating the modification of the supporter. It is a fragmentary sectional view in the S3-S3 position in FIG.

A contact member and an earphone including the contact member according to an embodiment of the present invention will be described with reference to FIGS.
In the following description, the respective directions in the up / down / left / right and front / back directions are defined as directions of arrows shown in FIG. This direction is not related to the direction in the posture in use, and is defined for convenience in order to facilitate understanding.

(Example)
The configuration of the earphone 51 of the embodiment will be described with reference to FIGS. 1 and 2. Earphone 51 is a canal earphone for the left ear.
FIG. 1 is an external perspective view of the earphone 51 as viewed from the diagonally upper left direction, and FIG. 2 is a longitudinal cross-sectional view of the earphone 51 as viewed from the right by cutting the earphone 51 from front to back and up and down at the S1-S1 position. is there.

  The earphone 51 includes a housing 1 in which a front housing 1F and a rear housing 1R are combined in the front-rear direction, a speaker unit SP housed inside the housing 1, a cord 2 drawn outward from the housing 1, And a supporter 3 attached to the housing 1. The supporter 3 is a contact member that contacts the inner wall Ef of the auricle E and stabilizes the mounting posture of the housing 1 when the housing 1 of the earphone 51 is mounted on the auricle E.

The front housing 1F is formed with a cylindrical sound tube portion 1a protruding forward (or obliquely left front). The sound tube portion 1a has a through-hole (not shown) along the axis, and a flexible earpiece 4 is detachably attached to the outer peripheral surface.
The rear housing 1R has a large-diameter portion 1b combined with the front housing 1F, and a small-diameter portion 1c having a smaller diameter than the large-diameter portion 1b connected to the rear side of the large-diameter portion 1b.

A cord hole 1d through which the cord 2 is inserted is formed on the lower side of the small diameter portion 1c. The cord hole 1d is substantially blocked by the cord 2 being inserted.
In this example, the connection surface 1e that connects the large-diameter portion 1b and the small-diameter portion 1c is formed as a surface that is orthogonal to the drive axis CL of the speaker unit SP.
The connection surface 1e is formed with one or a plurality of through holes 1f spaced apart in the circumferential direction. FIG. 2 shows two upper and lower through holes 1f.

Inside the housing 1, a back cavity Va, which is a space behind the speaker unit SP, is formed by being surrounded by the inner surface 1c1 of the small diameter portion 1c and the rear surface SPa of the speaker unit SP.
The only holes that connect the back cavity Va and the external space are the cord hole 1d and the through hole 1f. Here, since the code hole 1d is substantially sealed, the through hole 1f functions as a ventilation path that communicates the back cavity Va and the external space.

  A knot ball 2 a formed on one end side of the cord 2 is accommodated in the back cavity Va. The tip of the cord 2 is connected to a terminal provided on the rear surface SPa of the speaker unit SP (the terminal and connection mode are omitted in FIG. 2).

  The front housing 1F and the rear housing 1R are made of resin. Examples of the resin include ABS (acrylonitrile / butadiene / styrene) and PC (polycarbonate).

FIG. 3 is a rear view of the rear housing 1R, and shows an example of a form of forming the through hole 1f.
In this example, on the upper half side of the connecting surface 1e, the through holes 1f are a total of three through holes 1fa in the upward direction and three at a pitch of 22.5 ° clockwise and counterclockwise respectively. Seven are formed.
Seven through holes 1f are formed on the lower half side of the connection surface 1e symmetrically with the upper half side, and a total of fourteen through holes 1f are formed on the connection surface 1e.

In the above-described configuration, the output sound emitted forward by the vibration of the diaphragm SPb of the speaker unit SP is transmitted from the front cavity Vc, which is a space surrounded by the speaker unit SP and the front housing 1F, to the through hole of the sound tube unit 1a. Through the sound hole (not shown) at the tip thereof.
The sound SD emitted backward from the speaker unit SP travels from the through hole 1f to the external space via the back cavity Va.

In the earphone 51, the sound SD is released from the through hole 1 f to the external space via the supporter 3.
Next, the supporter 3 will be described in detail.

FIG. 4 is a perspective view of the supporter 3 and corresponds to that seen from the front upper left in FIG.
The supporter 3 includes a ring-shaped base portion 3b having a fitting hole 3a that can be fitted into the small-diameter portion 1c of the rear housing 1R with a slight strong fit, and a protruding portion 3c that protrudes radially outward from the base portion 3b. Have.
The supporter 3 is made of a material that has elasticity and is softer than the housing 1. Examples of materials are silicone rubber and elastomer.

The protruding portion 3c is a thin plate, and is generally formed in a triangular shape so as to include a line segment LNa that connects the most protruding top portion 3c1 and the center Ca of the fitting hole 3a.
The side edge 3c2 on one side (left side in FIG. 4) of the protruding portion 3c with respect to the line segment LNa has an arcuate shape that protrudes outward, and the side edge on the other side (right side in FIG. 4). The portion 3c3 has an inverted arc shape that is concave on the inside.

Inside the protrusion 3c, an air passage that connects an opening 3d1 formed at a position close to the fitting hole 3a on one surface side (near side in FIG. 4) and an opening 3d2 formed at the top 3c1. 3f is formed.
Specifically, the air passage 3f includes an air passage 3e1 (see also FIG. 2) formed from the opening 3d1 to the central portion of the protrusion 3c along the axial direction of the fitting hole 3a, and the air passage 3e1. The rear portion and the opening 3d2 are connected to each other, and the air passage 3e2 is formed along the line segment LNa.

As shown in FIG. 2, the supporter 3 is attached so that the base 3b is fitted to the back of the small-diameter portion 1c in close contact with the connection surface 1e and covers the through hole 1f.
Then, when the supporter 3 is set to a circumferential position where the top portion 3c1 is directly above (a position where the line segment LNa is in the vertical direction), the opening 3d1 and the through hole located at the uppermost position among the plurality of through holes 1f The positions of the holes 1fa coincide with each other so that they communicate with each other.

The earphone 51 provided with such a supporter 3 is worn on the auricle E in a wearing posture as shown in FIG.
That is, in the wearing posture, the earpiece 4 is inserted into the ear canal (not shown). The cord 2 is drawn downward from a notch Ec between the tragus Ea of the pinna E and the antitragus Eb. In the supporter 3, the side edge portion 3c2 flexibly contacts the wall surface Ee on the rear side of the concha Ed.
The abutment between the supporter 3 and the wall surface Ee is not a point abutment but a surface abutment with the side edge portion 3c2, and the abutment position is located away from the housing 1 in the radial direction. The wearing posture is highly stable.

According to the above-described configuration of the earphone 51 and the mounting posture of the auricle E, as shown in FIG. 2, the sound SD released backward from the speaker unit SP is passed through the through hole 1f of the rear housing 1R from the back cavity Va. Then, the air enters the ventilation path 3f from the opening 3d1 of the supporter 3.
The sound that has entered the air passage 3f is discharged from the air passage 3e1 through the air passage 3e2 to the outside through the opening 3d2 of the top portion 3c1.

The sound passing through the air passage 3f of the supporter 3 is attenuated by the energy absorbed by the supporter 3 during the passage process. In particular, since the supporter 3 is formed of a soft material having elasticity, energy attenuation becomes more effective.
Further, the air passage 3f is formed by a longest path that can be taken as a straight path inside the supporter 3 from the vicinity of the fitting hole 3a to the tip of the top 3c1, or a path comparable to the longest. Therefore, much of the energy of the sound SD is absorbed by the supporter 3 through the inner wall of the air passage 3f.

As shown in FIG. 6, in the mounting posture of the earphone 51, the opening 3 d 2 of the top 3 c 1 is opposed to the inner wall Ef of the pinna E and is in a separated position. FIG. 6 is a schematic cross-sectional view at the position S2-S2 in FIG.
The sound SD traveling through the air passage 3f is emitted from the opening 3d2 to the external space because the opening 3d2 is separated from the inner wall Ef, and then collides with the inner wall Ef. In this collision, since the inner wall Ef is soft on the skin and the surface has fine irregularities, the sound SD is irregularly reflected and energy is absorbed on the inner wall Ef side.
The energy attenuation of the sound SD due to the passage through the air passage 3f and the reflection at the inner wall Ef is particularly remarkable in the mid-high range.

Thus, the sound SD output backward from the speaker unit SP is absorbed by the supporter 3 and released into the external space as a small sound. Even after being released to the external space, the remaining energy is further absorbed by the inner wall Ef of the auricle E, and the sound reflected by the inner wall Ef is extremely small. This is particularly effective at low frequencies.
Thereby, when the sound SD is heard by other people, the sound is sufficiently small, and sound leakage is suppressed extremely well.

In the above-described configuration, the supporter 3 can be slid and rotated in the circumferential direction, although it is strongly fitted to the small diameter portion 1c of the rear housing 1R.
That is, since there is an individual difference in the shape of the pinna E, the position of the supporter 3 can be set to a preferred position by rotating in the circumferential direction so that the mounting posture is more stable.
In the above example, as apparent from FIGS. 3 and 7, sound leakage is caused by connecting the through holes 1f and the air passages 3f by rotating the supporter 3 clockwise at a pitch of 22.5 ° in rear view. It is possible to exert an inhibitory effect.
In FIG. 7, a position P1 rotated by 45 ° and a position P2 rotated 45 ° counterclockwise are shown. Furthermore, a position P3 is also shown in which the through hole 1f and the air passage 3f are connected by turning 90 ° counterclockwise from the position P2.

The earphone 51 can be worn on the auricle E in the wearing posture shown in FIG. 8, which is different from the wearing posture shown in FIG.
The wearing posture shown in FIG. 8 is such that the posture of the earphone 51 is such that the cord 2 is pulled obliquely upward and hung on the outside of the auricle E from the front of the head to the rear.
In this mounting posture, the supporter 3 is, for example, in a position where the through hole 1fb (see FIG. 3) and the ventilation path 3f are connected (position rotated 67.5 ° counterclockwise with respect to the position P2). .

By narrowing the circumferential angular interval of the through holes 1f provided in the connection surface 1e, the circumferential position of the supporter 3 that can connect the through holes 1f and the air passages 3f is set finely and in multiple stages. be able to.
As a result, the circumferential position of the supporter 3 is finely adjusted, and a wearing posture that is more suitable for the shape of the pinna E to be worn can be obtained. Therefore, the wearability of the earphone 51 is further improved.

  In the sliding rotation of the supporter 3 with respect to the small-diameter portion 1c, a click feeling may be given by uneven engagement. If a click feeling is obtained at a position where the through hole 1f and the air passage 3f are connected, the circumferential position of the supporter 3 can be determined accurately and reliably. The concave-convex engagement may be convex on either the rear housing 1R side having the small diameter portion 1c or the supporter 3 side, but if the hard rear housing 1R side is convex and the soft supporter 3 side is concave, the engagement It is better because the position is obtained with higher accuracy and the durability is excellent.

  When the supporter 3 is set to a position where the through hole 1f and the opening 3d1 do not correspond (non-communication position), the sound SD output backward from the speaker unit SP can be prevented from being emitted to the external space at all. If, for example, a click feeling is obtained at this position due to uneven engagement, the supporter 3 can be positioned more reliably. In this position, the sound SD is not released at all into the external space, and sound leakage is almost completely blocked, so that it is particularly effective in a use environment where sound leakage prevention is given priority over sound quality.

  The embodiments of the present invention are not limited to the above-described configuration, and modifications may be made without departing from the spirit of the present invention.

(Modification 1)
The supporter 31 according to the first modification example in which a groove extending in the circumferential direction is formed in the supporter 3 and the opening 3d1 of the supporter 3 is opened on the bottom surface thereof may be used.
FIG. 8 is a perspective view for explaining the supporter 31 and corresponds to FIG. 3.

The supporter 31 has a groove 31d1 extending in the circumferential direction within a range of a predetermined angle θa at a radial position corresponding to the through hole 1f with respect to the supporter 3.
An air passage 31e1 corresponding to the air passage 3e2 in the supporter 3 communicates with the groove portion 31d1.
The ventilation path 31e1 and the opening part 31d2 formed in the top part 31c1 are connected by the ventilation path 31e2.
The ventilation path 3f is configured by the ventilation path 31e1, the ventilation path 31e2, and the groove 31d1.

According to the supporter 31, if the through hole 1f is at a position corresponding to the range of the predetermined angle θa, the circumferential position with respect to the small diameter portion 1c can be arbitrarily set.
As a result, the sound SD is guided from the through hole 1f to the opening 31d2 through the groove 31d1 as a part of the air passage 31f and released toward the inner wall Ef while taking a wearing posture that is more suitable for the shape of the user's auricle. can do.

(Modification 2)
In the supporter 3, the ventilation path 3 f is preferable because the energy of the sound SD is more attenuated as the path length is longer.
From this point of view, the ventilation path 3f may be formed in a shape including a curved portion instead of a straight shape, and may be modified example 2.
9 and 10 are diagrams for explaining the supporter 32 according to the second modification having the curved ventilation path 32f. FIG. 9 is a perspective view, and FIG. 10 is an assembly view.

  The supporter 32 is configured such that the ventilation paths 3f and 31f linearized by the supporter 3 and the supporter 31 are ventilation paths 32f including curved portions. Specifically, an opening 32d1 provided in the vicinity of the fitting hole 32a and provided at a radial position corresponding to the through hole 1f, and an opening 32d2 provided at the top 32c1 of the protrusion 32c are formed in a curved shape. The ventilation path 32e2 is connected to form a ventilation path 32f. In this example, the ventilation path 32e2 is formed as a meandering ventilation path.

  Thereby, since the path length of the ventilation path 32f is longer than that of the linear ventilation paths 3f and 31f, the attenuation of the sound SD passing through the ventilation path 32f becomes more remarkable, and sound leakage is suppressed more favorably. .

The supporter 32 is formed, for example, as shown in FIG.
Specifically, a supporter piece 33a and a supporter piece 33b are formed by dividing the supporter 32 into two in the thickness direction, and both members are fixed with an adhesive or the like.
The supporter piece 33a is provided with an opening 32d1 as a through hole, and the supporter piece 33b is formed with a groove 32e3 that includes a position corresponding to the opening 32d1. The cross-sectional shape of the groove 32e3 is not limited.

  By integrating the supporter piece 33a and the supporter piece 33b together, the groove 32e3 becomes a ventilation path 32e2 (ventilation path 32f) that is meandering except for the openings 32d1 and 32d2.

(Modification 3)
The supporter 3 of the embodiment is provided with an opening 3d2 that opens on the side surface only in the top 3c1.
Depending on the shape of the pinna E having a large individual difference, the top 3c1 is covered with the inner wall Ef of the pinna E in a state where the supporter 3 is slidably rotated with respect to the small diameter portion 1c to obtain a good wearing feeling. Thus, the opening 3d2 may be blocked.

Therefore, as shown in FIG. 11, it is preferable that the support 3 is formed with a plurality of openings 3d2 at different positions on the side surface of the protrusion 3c.
In the supporter 34 of Modification 3, in addition to the opening 34d2 provided at the top 34c1, a plurality (two in this example) of openings 34d3 and 34d4 are formed on the side edge 34c2 having a convex curved surface. An opening 34d5 is formed in the side edge 34c3 having a concave curved side surface.
An air passage 34f that connects the opening 34d1 and the openings 34d2 to 34d5 is formed.

In the example shown in FIG. 11, the air passage 34 f includes an air passage 34 e 2 that connects the opening 34 d 1 and the opening 34 d 2, and air passages 34 e 3 to 34 e 5 that connect the air passage 34 e 2 and the openings 3 d 3 to 3 d 5, respectively. It is comprised by.
The air passage 34f is not limited to this configuration. As long as the passage is connected to the opening 34d1 connected to the through hole 1f of the housing 1, the mode of the air passage can be freely set.

This supporter 34 has an opening in each of a top part 34c1, a side edge part 34c2 on one side of the top part 34c1, and a side edge part 34c3 on the other side.
As a result, no matter what the mounting posture or the shape of the pinna E is, all the openings are not substantially blocked by the inner wall Ef of the pinna E, and sound leakage is suppressed satisfactorily.

When a plurality of openings are provided as in the supporter 34, the total pressure of the pressure in the opening 34d1 and the partial pressure in each of the openings 34d2 to 34d5 due to the sound SD output behind the speaker unit SP is obtained from Pascal's principle. Are equal.
Thereby, the pressure of the sound emitted to the outside from each of the openings 34d2 to 34d5 is reduced, and sound leakage can be reduced as compared with the case of one opening.
That is, the greater the number of openings, the more the sound leakage from each opening can be reduced.

(Modification of Modification 3)
In the supporter 3 or the like, the opening 3d1 for introducing the sound SD into the air passage 3f is not limited to a round hole shape. It may be a square hole.
In the supporter 34, a groove 34g that communicates with each of the openings 34d2 to 34d5 may be formed on the side surface of the protrusion 34c that extends from the side edge 34c2 to the side edge 34c3 via the top 34c1.

FIG. 12 is a partial perspective view of a part of the top 34c1 and the side edge 34c2 of the supporter 34, and FIG. 13 is a partial cross-sectional view at the position S3-S3 in FIG.
The groove part 34g is, for example, a square shape having a bottom part 34g1 in cross-sectional shape, and openings 34d2 to 34d5 are opened in the bottom part 34g1.
By providing the groove 34g, the opening 34d2 and the like are not blocked even when the side edge 34c2 is in close contact with the inner wall Ef of the auricle E in the mounting posture as shown in FIG.
The sound SD emitted from the opening 34d2 or the like is emitted into a narrow space Vb surrounded by the groove 34g and the inner wall Ef.

As a result, while the sound SD propagates through the space Vb, the energy is well absorbed by both the inner wall Ef and the protruding portion 34c, and the sound when emitted to the external space through the space Vb is extremely small.
Therefore, sound leakage is more reliably and better suppressed regardless of the mounting posture and the shape of the pinna E.

(Other variations)
For example, in the sliding rotation of the supporter 3 with respect to the small-diameter portion 1c, a click feeling may be given by uneven engagement. If a click feeling is obtained at a position where the through hole 1f and the air passage 3f are connected, the circumferential position of the supporter 3 can be determined accurately and reliably. The concave / convex engagement may be made such that the hard rear housing 1R side is convex and the soft supporter 3 side is concave.
This configuration may be applied to the first to third modifications.
The housing 1 is not limited to the one formed by combining the two members of the front housing 1F and the rear housing 1R. It may be composed of one member or three or more members.
The supporter 3 is not limited to the one that is attached to the housing 1 by strong fitting. The attachment form is free.
The through hole 1f may not communicate with the back cavity Va and the external space.
In view of the acoustic characteristics of the earphone 51, the front cavity Vc and the external space may be communicated with each other.
The abutting member of the present invention has elasticity and a ventilation path that abuts the inner wall Ef of the auricle with the earphone provided with the abutting member and communicates the internal space of the housing 1 with the external space. And the outlet of the air passage is provided at a position facing the auricle apart from the auricle in the mounted state.

  The opening provided in the protruding portion may be located at a position facing the inner wall Ef of the auricle E and spaced apart.

Although the above-described earphone 51 has been described for the left ear, the earphone 51 may be for the right ear having a symmetrical shape.
The shape of the protrusion 3c is not limited to a substantially triangular shape. Further, a part may be cut out to be a frame shape. In the case of the frame shape, the air passage may be formed so as to pass through the frame and open to the outer surface of the frame.
Earphone 51 is not limited to the canal type. It may be an inner ear type or other type.
You may combine the above-mentioned Example and each modification in the possible range.

DESCRIPTION OF SYMBOLS 1 Housing, 1F Front housing, 1R Rear housing 1a Sound tube part, 1b Large diameter part, 1c Small diameter part, 1c1 Inner surface 1d Cord hole, 1e Connection surface, 1f Through-hole 2 Cord, 2a Knotting balls 3, 31, 32, 34 Supporter 3a, 32a Fitting hole, 3b Base, 3c, 32c, 34c Projection 3c1, 31c1, 32c1, 34c1 Top 3c2, 3c3, 34c2, 34c3 Side edge 3d1, 3d2, 32d1, 32d2, 34d2-34d5 Opening 3e1 , 3e2, 3f, 31e1, 31e2, 31f, 32f, 32e2, 34f Ventilation path, 31d1, 32e3, 34g Groove 33a, 33b Supporter piece, 34g1 Bottom 4 Earpiece 51 Earphone Ca center, CL drive axis E Auricle Ea tragus, Eb anti-tragus, Ec intercuspid notch, Ed concha Ee Wall surface, Ef Inner wall LNa line segment SD (output from speaker unit SP) SP SP speaker unit, SPa rear surface, SPb diaphragm Va back cavity, Vb space, Vc front cavity θa angle

Claims (6)

A contact member that is provided in an earphone that is used by accommodating a housing having a through hole that connects the inside and outside of the auricle and that abuts against the inner wall of the auricle during use to stabilize the mounting posture of the earphone,
A base covering the through hole;
A projecting portion projecting radially outward of the housing from the base portion;
An air passage connecting the first opening that communicates with the through hole in the base and the second opening that opens in the protrusion;
A contact member characterized by comprising: A housing having a through hole connecting the inside and the outside;
A base that covers the through hole, a protrusion that protrudes radially outward of the housing from the base, a first opening that communicates with the through hole in the base, and a second opening that opens in the protrusion A contact member having an air passage connecting the
Earphone with   The earphone according to claim 2, wherein the contact member includes a plurality of the second openings.   The earphone according to claim 2 or 3, wherein the air passage is formed to include a curved portion.   The earphone according to any one of claims 2 to 4, wherein the through hole connects a back cavity and an external space.   The earphone according to any one of claims 2 to 5, wherein the contact member is provided so as to be movable in a circumferential direction position of the protruding portion with respect to the housing.

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