JP2012124587A - Earphone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a space on the rear surface side of a driver unit in a housing to function as an acoustic space, prevent sound missing, and achieve high sound quality with a small structure by closing a boundary portion between the housing and a cable holding part.SOLUTION: An earphone 10 has: a driver unit generating sounds; a housing 11 holding the driver unit therein; an external canal insertion part which is connected with the housing 11 on the front surface side of the driver unit and at least a part of which is inserted into an external canal; and a cable holding part 15 which is connected with the housing 11 on the rear surface side of the driver unit and in which a cable connected with the driver unit at one end is inserted thorough the inside thereof. The cable holding part 15 includes a hold projecting part which projects inward, holds the cable, and closes a boundary portion between the housing 11 and the cable holding part 15.

Description

  The present invention relates to an earphone having an ear canal insertion portion into which at least a part is inserted into the ear canal.

  2. Description of the Related Art Conventionally, as an earphone that is used by being attached to an auricle, a so-called earphone-type headphone that does not have a protrusion inserted into the ear canal is known (see, for example, Patent Document 1). Such an earphone has a dynamic driver unit, and generates a sound by vibrating a diaphragm included in the driver unit.

  FIG. 6 is a cross-sectional view showing the structure of a conventional earphone.

  In the figure, reference numeral 813 denotes a rear housing of the earphone. A driver unit 841 is attached inside the earphone, and a ring-shaped front housing 812 fitted to the front end (lower end in the figure) of the rear housing 813 The driver unit 841 is fixed. A duct-shaped cable holding portion 815 extends from the rear surface of the rear housing 813. One end of the cable holding portion 815 is connected to the driver unit 841, and the other end is not shown in the figure. Music player, television, radio, video An electric wire cable 891 connected to an acoustic device (not shown) such as a deck is accommodated.

  The driver unit 841 includes a magnet 843 that forms a magnetic circuit, a plate 844, and a yoke 845, and a diaphragm 846 and a voice coil 847 that form a vibration system. Specifically, the plate 844 and the yoke 845 are fixed to both surfaces of the disk-shaped magnet 843. The magnet 843 is, for example, a samarium cobalt magnet. A magnetic gap is formed in a space where the plate 844 and the yoke 845 face each other, and a voice coil 847 fixed to the diaphragm 846 is inserted into the magnetic gap. The diaphragm 846 is, for example, a polyester film. Note that a mesh-shaped protective plate 848 having a relatively large number of openings is disposed in front of the earphone, that is, in front of the diaphragm 846 (downward in the drawing).

  A through hole 849 is formed at the center of the magnet 843, the plate 844, and the yoke 845, and a resistance material 871 made of foamed urethane or the like is embedded in the through hole 849. Further, the driver unit 841 is formed with a plurality of holes 870.

  When the earphone is attached to the concave portion of the auricle, the protective plate 848 disposed on the front surface of the earphone faces the entrance of the ear canal, and sound generated by the vibration of the diaphragm 846 passes through the opening of the protective plate 848 and enters the inside of the ear canal. Incident and reaches the eardrum.

Japanese Utility Model Publication No. 4-50718

  However, since the conventional earphone is worn in the concave portion of the auricle, the wearability is poor, and in particular, when the user is not in a stationary state such as during walking, the earphone may come off from the auricle. In addition, the positional relationship with the ear canal becomes unstable, and the volume and quality of sound incident on the ear canal become unstable. Furthermore, since the rear surface of the rear housing 813 is opened to the outside via the hollow cable holding portion 815, so-called sound leakage occurs, and the space behind the driver unit 841 is suitable as an enclosed acoustic space. Will no longer function.

  In recent years, an earphone of a type having an ear pad made of soft rubber having elasticity and inserting the ear pad into the ear canal has been provided. Since such an earphone is attached by inserting a flexible ear pad into the ear canal, it can be securely attached to the auricle and does not come off the auricle even during walking. Moreover, since the ear pad is made of a material having elasticity, it can be easily elastically deformed according to the shape of the ear canal, and a good wearing feeling can be obtained.

  However, when the ear pad is inserted into the ear canal, the inside and outside of the ear canal is blocked by the ear pad that is pressed and deformed by the ear canal, and the sound incident on the ear canal from the earphone does not escape outside, so the so-called sound loss becomes worse, A feeling of stagnation, a feeling of jerkyness, etc. occurs and the sound quality deteriorates.

  The present invention solves the problems of the conventional earphone and closes the boundary between the housing and the cable holding portion, thereby functioning the space on the back side of the driver unit in the housing as an acoustic space. An object of the present invention is to provide a small-sized and high-quality earphone that does not cause sound omission.

  Therefore, in the earphone of the present invention, a driver unit that generates sound, a housing that holds the driver unit therein, and a front side of the driver unit are connected to the housing, and at least a part of the earphone is connected to the ear canal. An earphone having an insertable ear canal insertion portion, and a cable holding portion into which a cable connected to the housing on the back side of the driver unit and having one end connected to the driver unit is inserted, The cable holding part is a holding convex part that protrudes inward and holds the cable, and includes a holding convex part that closes a boundary portion between the housing and the cable holding part.

  In another earphone of the present invention, an adhesive material is applied to a portion where the holding convex portion holds the cable.

  In still another earphone of the present invention, the casing is formed in a front space formed on a front side of the driver unit and in the ear canal insertion portion, a front end is opened, and a rear end is formed in the front space. And a rear space formed on the back side of the driver unit, a rear end connected to the rear space, and a rear end connected to the front end of the cable housing recess in the cable holding portion A projecting space, and the sound guide hole has a central axis inclined with respect to a central axis of the driver unit, and a connection position to the front space is biased in an inclined direction, In the rear projecting space, the connection position to the rear space is biased to the opposite side of the connection position to the front space of the sound guide hole.

  In still another earphone of the present invention, the distal end of the sound guide hole on the opposite side to the inclined direction as viewed from the central axis of the sound guide hole at the connection edge to the front space of the sound guide hole may be the driver unit. Or on the opposite side of the tilt direction from the central axis.

  According to the present invention, the earphone is closed at the boundary between the housing and the cable holding portion. As a result, the space on the back side of the driver unit in the housing can be made to function as an acoustic space, so that it is possible to provide a small and high-quality earphone without causing sound loss.

BRIEF DESCRIPTION OF THE DRAWINGS It is the 1st perspective view of the earphone in embodiment of this invention, Comprising: (a) And (b) is the figure seen from a mutually different angle. It is the 2nd perspective view of the earphone in an embodiment of the invention, and (a) and (b) are the figures seen from a mutually different angle. It is a two-plane figure of the earphone in an embodiment of the invention, (a) is an AA arrow line view in Drawing 1, and (b) is a BB arrow sectional view in Drawing 1. FIG. 4 is a perspective view of the earphone according to the embodiment of the present invention, and shows a state where a lid (lid) is removed. BRIEF DESCRIPTION OF THE DRAWINGS It is a two-plane figure of the earphone in embodiment of this invention, Comprising: (a) is a rear view in the state which removed the cover body, (b) is CC arrow in (a) in the state which attached the cover body FIG. It is sectional drawing which shows the structure of the conventional earphone.

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

  FIG. 1 is a first perspective view of an earphone according to an embodiment of the present invention, FIG. 2 is a second perspective view of the earphone according to an embodiment of the present invention, and FIG. 3 is two views of the earphone according to the embodiment of the present invention. FIG. 1 and 2, (a) and (b) are views seen from mutually different angles. In FIG. 3, (a) is a view taken along the line AA in FIG. 1, and (b) is a diagram. 1 is a cross-sectional view taken along line BB in FIG.

  In the figure, reference numeral 10 denotes an earphone according to the present embodiment, which is a small-sized sound generator that is used by being mounted on a user's pinna and is driven by a sound signal that is an electrical signal to reproduce the sound signal. The earphone 10 has a housing 11 as a housing that houses a driver unit 41 as a speaker unit that reproduces an audio signal and generates sound. The casing 11 is a main casing 12 as a main housing located on the back side of the driver unit 41 and a cap positioned on the front side of the driver unit 41 and coupled to the front side of the main casing 12. A lid housing 14. The driver unit 41 is held so as to be sandwiched between the main housing 12 and the lid housing 14.

  The driver unit 41 may be of any type as long as it reproduces an audio signal and generates sound, but here it is a so-called dynamic type, and a diaphragm (not shown) is used. A case where sound is generated by vibrating will be described. In this case, the driver unit 41 has the same configuration as that of the conventional earphone driver unit 841 described in the section “Background Art”. That is, in the present embodiment, the description of the driver unit 41 of the conventional earphone is used for the description of the driver unit 41.

  The lid housing 14 is a substantially disk-shaped or circular dish-shaped member, and is connected to an insertion convex portion 17 as a cylindrical external auditory canal insertion portion protruding forward. The insertion convex portion 17 is a member formed integrally with the lid housing 14, and has a shape and dimensions that allow at least a tip portion thereof to be inserted into the user's external auditory canal.

  The housing 11 is made of, for example, a resin such as a synthetic resin, but may be made of a metal such as aluminum, steel, or copper, or a composite material in which a resin, carbon, metal, or the like is combined. It may be a thing.

  Further, in the present embodiment, expressions indicating directions such as upper, lower, left, right, front, rear, etc. used for explaining the configuration and operation of each part of the earphone 10 are not absolute but relative This is appropriate when the earphone 10 or its parts are in the posture shown in the figure, but when the posture of the earphone 10 or its parts changes, it is changed and interpreted according to the change in posture. Is to be done.

  Further, the main housing 12 includes a cylindrical rear protrusion 12a that protrudes rearward, and the rear protrusion 12a has an electric cable 91 as a cable having one end connected to the driver unit 41. A front end of a rectangular tube-shaped cable holding portion 15 that surrounds and holds a part is connected. The rear side of the rear projecting portion 12a and the cable holding portion 15 is closed by a flat lid 13.

  A leading end of a lead wire (not shown) exposed from the leading end of the electric cable 91 is connected to the driver unit 41 in a conductive manner by connecting means such as soldering. If the electric wire cable 91 is pulled from the outside, the connection portion between the tip of the lead wire and the driver unit 41 may be broken, and the electric wire cable 91 may come off from the housing 11 and the cable holding portion 15. Therefore, a knot 91a is formed near one end of the electric cable 91 and is accommodated in the rear protruding space 24a in the rear protruding portion 12a.

  And the electric wire cable 91 extends from the opening 15d formed in the rear end portion 15c of the cable holding portion 15. In the figure, for convenience of illustration, the electric wire cable 91 is drawn only in a portion close to the cable holding portion 15 and drawing is omitted in the other portions. Then, at the other end (not shown) of the electric cable 91, an acoustic device (not shown) such as a music player, a television, a radio, a video deck, or the like is conductively connected to the other end of the lead wire.

  An acoustic space, that is, a front space 21 that functions as a front acoustic space is formed between the driver unit 41 and the lid housing 14 located on the front side of the driver unit 41, and is formed in the insertion convex portion 17. A housing sound guide hole 22 is formed as a sound guide hole which is a cylindrical opening whose rear end communicates with the front space 21 and whose front end is open. Thereby, the sound generated by the driver unit 41 enters the user's ear canal through the front space 21 and the housing sound guide hole 22.

  As shown in FIG. 3B, the insertion convex portion 17 and the housing sound guide hole 22 are formed so as to be coaxial with each other, and the lid housing 14, the front space 21, and the driver unit. It is inclined to one side (left side in FIG. 3) with respect to the front surface of 41. In the example shown in the figure, a vertical line passing through the center axis 22a of the housing sound guide hole 22 (coaxial with the center axis of the insertion projection 17) and the center of the front surface of the driver unit 41 that is circular, that is, the driver unit 41 is shown. The angle α formed by the central axis 41a (coaxial with the central axis of the lid housing 14 and the front space 21) is set to, for example, about 20 to 40 degrees, preferably about 30 degrees.

  Further, the positions where the insertion convex portion 17 and the housing sound guide hole 22 are connected to the lid housing 14 and the front space 21 are from the center of the front surface of the lid housing 14, the front space 21 and the driver unit 41. It is shifted to one side (left side in FIG. 3). That is, the insertion convex portion 17 and the housing sound guide hole 22 are connected to the lid housing 14 and the front space 21 while being biased in the inclination direction. In this case, the distal end of the housing sound guide hole 22 opposite to the inclined direction viewed from the central axis 22a of the housing sound guide hole 22 at the connection edge 21a to the front space 21 of the housing sound guide hole 22 is It is located on the central axis 41a or on the opposite side of the inclination direction from the central axis 41a. Desirably, the distal end is located on the central axis 41 a of the driver unit 41.

  Thus, since the insertion convex part 17 is biased to one side with respect to the lid housing 14 and is inclined, when the user wears the earphone 10, the lid housing 14 comes into close contact with the auricle, And the insertion convex part 17 is smoothly inserted in an ear canal. Therefore, the wearability and fit of the earphone 10 are good, and even when the user is not in a stationary state as during walking, the earphone 10 does not come off the auricle. Moreover, no sound leaks outside.

  Further, the distal end of the connection end edge 21a opposite to the inclination direction viewed from the central axis 22a of the housing sound guide hole 22 is on the central axis 41a of the driver unit 41 or opposite to the inclination direction than the central axis 41a. Since the connection position of the housing sound guide hole 22 to the front space 21 is set so as to be located on the side, the sound smoothly enters the ear canal from the front space 21 through the housing sound guide hole 22, As a result, the sound quality of the earphone 10 is also high quality and constant.

  Also, an acoustic space, that is, a rear space 24 that functions as a rear acoustic space is formed between the driver unit 41 and the main housing 12 positioned on the back side of the driver unit 41. The front end of the rear protrusion space 24 a in the rear protrusion 12 a communicates with the rear space 24 and functions as an acoustic space together with the rear space 24. Specifically, it functions as an auxiliary rear acoustic space that assists the function of the rear space 24 as an acoustic space.

  As shown in FIG. 3B, the positions where the rear projecting portion 12 a and the rear projecting space 24 a are connected to the main housing 12 and the rear space 24 are the main housing 12 and the rear space 24. And it is shifted from the center of the back surface of the driver unit 41 and is biased to the other (right side in FIG. 3). In other words, the insertion convex portion 17 and the housing sound guide hole 22 are biased in the direction in which the insertion convex portion 17 and the housing sound guide hole 22 are inclined and in the direction opposite to the biased direction. Thus, the rear protruding space 24a that protrudes rearward and functions as the auxiliary rear acoustic space is biased in the direction opposite to the direction in which the housing sound guide hole 22 inclines and the direction in which the casing sound guiding hole 22 is inclined. The sound quality of the sound that enters the ear canal through the housing sound guide hole 22 from the top is improved.

  A knot 91a of the electric cable 91 is accommodated in the rear protruding space 24a. As a result, the lead wire is prevented from displacing in a state of hanging in the rear space 24 and the rear protruding space 24a, and the function of the rear space 24 and the rear protruding space 24a as an acoustic space is impaired by the lead wire. Absent.

  Next, the structure of the cable holding portion 15 will be described in detail.

  FIG. 4 is a perspective view of the earphone according to the embodiment of the present invention, and shows a state where the lid is removed, and FIG. 5 is a two-view diagram of the earphone according to the embodiment of the present invention. 5A is a rear view with the lid removed, and FIG. 5B is a sectional view taken along the line CC in FIG. 5A with the lid attached.

  As shown in the figure, the cable holding portion 15 has a groove-like cable having a substantially rectangular cross section extending in the axial direction of the cable holding portion 15 (lateral direction in FIG. 5A). A housing recess 15a is formed. The front end of the cable housing recess 15 a communicates with the rear protruding space 24 a, and the rear end thereof is closed by the rear end portion 15 c of the cable holding portion 15. Since the opening 15d formed in the rear end portion 15c is a circular opening having a diameter larger than the outer diameter of the electric cable 91, the rear end of the cable housing recess 15a substantially passes through the periphery of the electric cable 91. It communicates with the outside.

  And the internal rib 15b as a holding convex part of the shape which protrudes inward is integrally formed in the inner wall which the said cable accommodating recessed part 15a opposes, respectively. The internal ribs 15b are preferably formed at a plurality of locations (three locations in the example shown in the figure) in the axial direction of the cable holding portion 15, but may be formed at only one location. The internal rib 15b is preferably formed at at least one location near the boundary between the cable receiving recess 15a and the rear protruding space 24a.

  Moreover, the internal rib 15b in each location is formed so that it may protrude toward the mutually opposing direction from the inner wall of the both sides of the cable accommodating recessed part 15a. Therefore, the interval between the tips of the internal ribs 15b facing each other is narrower than the interval between the inner side walls on both sides of the cable housing recess 15a. Therefore, when the electric wire cable 91 is pushed between the tips of the internal ribs 15b facing each other, the electric wire cable 91 is gripped from both sides by the internal ribs 15b and securely held.

  Thereby, the disconnection of the electric cable 91 can be reliably prevented. Further, even when the electric cable 91 is pulled from the outside, no force is applied to the connecting portion between the tip of the lead wire exposed from the leading end of the electric wire cable 91 and the driver unit 41, so that the connecting portion may be broken. Absent. Furthermore, the knot 91a can be omitted as necessary.

  The lid 13 is a substantially scoop-shaped plate member that covers and closes the rear surface of the rear protrusion 12 a and the cable holding portion 15. And the 1st latching | locking part 13a which protrudes toward the front is integrally formed in the front surface in the front end (upper end in FIG. 4) of the said cover body 13. As shown in FIG. The first latching portion 13a is latched by the latching convex portion 12b projecting from the inner wall of the rearward projecting portion 12a, whereby the lid 13 is locked in a state of being attached to the rear surface of the rearward projecting portion 12a. The A second hooking portion 13b is integrally formed on the front surface at the rear end (lower end in FIG. 4) of the lid body 13. The second hooking portion 13 b is hooked on the inner wall of the cable holding portion 15, whereby the lid body 13 is locked in a state of being attached to the back surface of the cable holding portion 15. Further, a protrusion 13c extending in the axial direction is integrally formed at the center of the front surface of the lid 13. As shown in FIG. 5 (b), the protrusion 13c contacts the upper end of the internal rib 15b in a state where the lid 13 is attached to the back surface of the rear protrusion 12a.

  And since the back surface of the lid 13 is flat, any design, color, or the like can be applied by a technique such as printing or attaching a sheet. Therefore, the design of the earphone 10 is improved.

  As shown in FIG. 5 (b), in the portion where the internal rib 15b is formed, the electric wire cable 91 may be provided, and the space in the cable housing recess 15a is effectively closed. . That is, since only an extremely narrow space remains between the internal rib 15b, the electric cable 91, and the lid 13, the space in the cable housing recess 15a is effectively closed. FIG. 5B shows a cross section of the internal rib 15b formed in the middle of the three internal ribs 15b, but the cross section of the other internal rib 15b is the same. It is.

  Then, at the location where the inner rib 15b (the first inner rib 15b from the left in FIG. 5A) is formed at the front end of the cable receiving recess 15a and in the vicinity of the boundary with the rear protruding space 24a. Since the space in the recess 15a is effectively closed, the rear end of the rear protruding space 24a is defined. Accordingly, the volume of the rear protruding space 24a as the acoustic space and the volume of the rear space 24 as the acoustic space including the rear protruding space 24a can be maintained at a predetermined value, and high sound quality can be obtained.

  Further, since the rear end of the rear protruding space 24a is closed, so-called sound leakage, which is a phenomenon in which sound leaks to the outside through the opening 15d formed in the cable housing recess 15a and the rear end portion 15c, can be prevented.

  If necessary, adhesive material such as an adhesive is applied to the location where the internal rib 15b holds the electric cable 91, so that it remains between the internal rib 15b, the electric cable 91, and the lid 13. A narrow space can also be completely sealed. As a result, the rear end of the rear protruding space 24a is more reliably defined, so that the rear protruding space 24a as the acoustic space and the volume of the rear space 24 as the acoustic space including the rear protruding space 24a are reliably set to a predetermined value. Can be maintained, and higher sound quality can be obtained. Further, since the rear end of the rear protruding space 24a is reliably closed, sound leakage can be reliably prevented. Furthermore, since it is sufficient to apply an adhesive material in an amount sufficient to seal the narrow space remaining between the internal rib 15b, the electric cable 91, and the lid body 13, the application amount of the adhesive material may be small. An increase in cost can be suppressed.

  In addition, by changing the position of the internal rib 15b formed in the vicinity of the boundary portion between the front end of the cable housing recess 15a and the rear protruding space 24a in the axial direction of the cable holding portion 15, the rear protruding as the acoustic space is achieved. The volume of the rear space 24 as the acoustic space including the space 24a and the rear protruding space 24a can be changed, and the sound quality of the earphone 10 can be adjusted. In the example shown in FIGS. 4 and 5 (a), the inner rib 15b formed at the front end of the cable receiving recess 15a and in the vicinity of the boundary portion with the rear protruding space 24a is more than the foremost end of the cable receiving recess 15a. It can be seen that it is located slightly closer to the rear end. As a result, the rear protruding space 24a and the rear space 24 including the rear protruding space 24a are adjusted to have a larger volume than the case where the inner rib 15b is positioned at the foremost end of the cable housing recess 15a. The sound quality of 10 is adjusted to be higher quality.

  As described above, the earphone 10 according to the present embodiment is connected to the housing 11 on the front side of the driver unit 41, the housing 11 holding the driver unit 41 inside the driver unit 41 that generates sound, and at least An insertion convex portion 17 that can be partially inserted into the external auditory canal, and a cable holding portion 15 that is connected to the housing 11 on the back side of the driver unit 41 and is connected to the driver unit 41 at one end. The cable holding portion 15 is an internal rib 15b that protrudes inward and holds the electric cable 91, and has an internal rib 15b that closes a boundary portion between the housing 11 and the cable holding portion 15. Prepare.

  Thereby, since the boundary part of the housing | casing 11 and the cable holding part 15 can be closed, the space of the back side of the driver unit in the housing | casing 11 can be functioned as an acoustic space. Also, no sound loss occurs. And even if the earphone 10 is downsized, high sound quality can be obtained.

  Moreover, the adhesive material is provided to the location where the internal rib 15b holds the electric cable 91. Thereby, since the space around the internal rib 15b can be completely sealed, the function as an acoustic space can be improved, and higher sound quality can be obtained.

  Further, the housing 11 is formed in the front space 21 formed on the front side of the driver unit 41 and the insertion convex portion 17, and the housing sound guide hole in which the front end is opened and the rear end is connected to the front space 21. 22, a rear space 24 formed on the back side of the driver unit 41, and a rear protruding space 24 a to which the front end is connected to the rear space 24 and the front end of the cable housing recess 15 a in the cable holding portion 15 is connected. The housing sound guide hole 22 has a central axis 22a inclined with respect to the central axis 41a of the driver unit 41, and the connection position to the front space 21 is biased in the inclined direction, and the rear protruding space 24a, the connection position to the rear space 24 is biased to the opposite side to the connection position to the front space 21 of the housing sound guide hole 22. As described above, the housing sound guide hole 22 is inclined and biased in the inclined direction. Therefore, when the user wears the earphone 10, the housing 11 comes into close contact with the auricle and the insertion convex portion 17. Is smoothly inserted into the external auditory canal, so that the wearability and fit of the earphone 10 are good and sound does not leak outside. Further, since the rear protruding space 24a is biased to the opposite side of the housing sound guide hole 22 and connected to the rear space 24, the housing sound guide hole 22 is inclined and biased in the tilt direction. However, good quality sound can be emitted through the housing sound guide hole 22.

  Furthermore, the distal end of the housing sound guide hole 22 opposite to the inclined direction viewed from the center axis 22a of the housing sound guide hole 22 at the connection edge 21a to the front space 21 is the center axis 41a of the driver unit 41. It is located on the opposite side of the tilt direction from the upper or central axis 41a. Thereby, the mounting property and fitting property of the earphone 10 are further improved.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

  The present invention can be applied to an earphone having an ear canal insertion portion into which at least a part is inserted into the ear canal.

DESCRIPTION OF SYMBOLS 10 Earphone 11 Housing | casing 12 Main housing | casing 12a Back protrusion 12b Latching convex part 13 Lid 13a 1st latching part 13b 2nd latching part 13c Projection part 14 Lid | casing housing | casing 15,815 Cable holding part 15a Concave portion 15b Internal rib 15c Rear end portion 15d Opening 17 Insertion convex portion 21 Front space 21a Connection end edge 22 Housing sound guide holes 22a and 41a Central axis 24 Rear space 24a Backward projecting space 41 and 841 Driver unit 91 and 891 Electric cable 91a Knot 812 Front housing 813 Rear housing 843 Magnet 844 Plate 845 Yoke 846 Diaphragm 847 Voice coil 848 Protection plate 849 Through hole 870 Hole 871 Resistance material

Claims (4)

(A) a driver unit that generates sound;
(B) a housing for holding the driver unit therein;
(C) an ear canal insertion portion that is connected to the housing on the front side of the driver unit and is at least partially insertable into the ear canal;
(D) an earphone having a cable holding portion through which a cable connected to the housing on the back side of the driver unit and having one end connected to the driver unit is inserted;
(E) The cable holding portion is a holding convex portion that protrudes inward to hold the cable, and includes a holding convex portion that closes a boundary portion between the housing and the cable holding portion. Earphone. The earphone according to claim 1, wherein an adhesive material is applied to a portion where the holding convex portion holds the cable. The housing includes a front space formed on a front surface side of the driver unit, a sound guide hole formed in the ear canal insertion portion, having a front end opened and a rear end connected to the front space, and the driver unit. A rear space formed on the back surface side, and a rear protruding space to which a front end is connected to the rear space and a front end of a cable housing recess in the cable holding portion is connected,
The sound guide hole has a central axis inclined with respect to the central axis of the driver unit, and a connection position to the front space is biased in an inclined direction,
The earphone according to claim 1, wherein the rear projecting space has a connection position to the rear space that is biased to a side opposite to a connection position to the front space of the sound guide hole. The distal end opposite to the inclined direction as viewed from the central axis of the sound guiding hole at the connection edge to the front space of the sound guiding hole is on the central axis of the driver unit or inclined relative to the central axis. The earphone according to claim 3, which is located on a side opposite to the direction.

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