JP4435133B2 - Earphone device - Google Patents

Description

  In the present invention, the present invention radiates reproduced sound from the speaker unit to the acoustic tube attached to the auricle, and listens to the reproduced sound radiated from the speaker unit via the acoustic tube. The present invention relates to a type of earphone device.

  2. Description of the Related Art Conventionally, a headphone device or an earphone device that is attached to a head or an auricle and radiates reproduced sound emitted from a speaker unit directly into the ear canal is used.

  Since this type of headphone device or earphone device is mounted on the head or pinna with the diaphragm of the speaker unit facing the eardrum in the ear canal, the reproduced sound from the speaker unit radiated into the ear canal Is reflected by the eardrum and enters the speaker unit. Then, the reflected sound reflected by the eardrum and the reproduced sound radiated from the speaker unit influence each other by interfering with each other, thereby degrading reproduction characteristics such as sound quality of the reproduced sound to be heard.

  There has been proposed an acoustic reproduction device that eliminates the influence of the reflected sound reflected by the eardrum and allows the reproduced sound emitted from the speaker unit to be heard with good reproduction characteristics. In this sound reproducing apparatus, a speaker unit is attached to the middle part of an acoustic tube inserted into the ear canal at one end, and a reproduced sound radiated from the speaker unit is incident on the acoustic tube, and the reproduced sound is transmitted through the acoustic tube. It is intended to listen. The sound reproducing device configured as described above is configured such that the reflected sound reflected from the eardrum is attenuated by being incident on the acoustic tube. Therefore, the influence of the reflected sound reflected from the eardrum on the reproduced sound radiated from the speaker unit is suppressed, and the reproduced sound can be heard with good reproduction characteristics with clear sound quality without causing distortion or the like in the reproduced sound. It becomes possible.

  By the way, in a sound reproducing apparatus including an acoustic tube, it is necessary to surely attenuate the reflected sound within the acoustic tube in order to eliminate the influence of the reflected sound reflected from the eardrum. In order to reliably attenuate the sound reflected from the eardrum, the acoustic tube needs a certain length. It is extremely difficult to attach such an acoustic tube having a certain length to the auricle while extending straight. That is, the acoustic tube protrudes greatly from the auricle and cannot be stably attached to the auricle.

  Further, in order to guide the reflected sound reflected from the eardrum into the acoustic tube without being reflected by the insertion end of the acoustic tube into the ear canal, the inner diameter of the acoustic tube needs to be substantially equal to the diameter of the ear canal. Thus, when an acoustic tube having an inner diameter substantially equal to the diameter of the ear canal is formed of synthetic resin, the inner diameter is about 4 mm and the outer diameter is about 6 mm. Thus, in the sound reproducing device configured to be mounted with a relatively thick acoustic tube protruding from the auricle as compared to the auricle to be mounted, the device itself becomes extremely large.

  Therefore, an object of the present invention is to provide an earphone device that can obtain good sound reproduction characteristics while being an auricle-mounted type.

  Moreover, this invention makes it a technical subject to provide the earphone apparatus which can be mounted | worn with a favorable mounting feeling.

  Furthermore, the present invention provides a technology for providing an earphone device that enables listening to sound reproduced from a speaker unit used in the earphone device with good reproduction characteristics without being affected by noise from the external environment. Let it be an issue.

The earphone device according to the present invention proposed to achieve the technical problem described above has an outer casing that houses a diaphragm, and the sound emitted from the diaphragm is emitted to the outside, and an ear is attached to the tip. An acoustic tube having a pin insertion portion, and an auricle attachment body attached to the pin insertion portion of the acoustic tube, the pinion attachment body being a cylindrical shape that can be fitted to the pin insertion portion An attachment portion, and an ear canal fitting body formed of an elastic material separated from the outer periphery of the attachment portion, and one end portion of the ear canal fitting body is connected to one end portion of the attachment portion The other end portion of the ear canal fitting body is a free end, and the auricle insertion portion has a substantially linear shape and extends from the outer casing in a direction substantially parallel to the surface of the diaphragm. The direction in which the sound is emitted from the diaphragm is opposite to the extending surface of the diaphragm. Te is substantially perpendicular, the outer peripheral surface of the outer casing is characterized in that the surface substantially parallel to the plane of extension of the diaphragm at a position facing the vibration plate is formed.

The earphone device according to the present invention is characterized in that the diameter of the diaphragm is selected to be larger than the diameter of the acoustic tube .

In the earphone device according to the present invention, since the acoustic tube is linear, the size can be reduced as compared with a substantially L shape. Moreover, it becomes possible to make it stably attach to an auricle by size reduction. In addition, physical failure of the acoustic tube can be prevented even when it is dropped or an external force is applied.

Furthermore, since a surface substantially parallel to the surface of the diaphragm is formed on the outer peripheral surface of the outer casing at a position facing the diaphragm, the earphone device is attached to and detached from the auricle in parallel with the surface of the diaphragm. By holding a flat surface and a surface facing the surface, it is possible to easily carry out without disturbing one's own finger.

  Hereinafter, specific embodiments of an earphone device according to the present invention will be described with reference to the drawings.

  An example of an earphone device to which the present invention is applied will be described with reference to FIGS. 1 to 4. The earphone device includes a speaker unit 1 that reproduces an audio signal input from an audio signal source such as an optical disk player, and the like. An acoustic tube 2 that guides reproduced sound radiated from the speaker unit 1 to the ear canal of the pinna, a microphone unit 3 that collects sound of the external environment, and a housing 4 that houses the speaker unit 1 and the microphone unit 3 are provided. ing.

  As shown in FIGS. 3 and 4, the acoustic tube 2 that guides the reproduced sound radiated from the speaker unit 1 to the ear canal b is inserted into the auricle a at the time of wearing, and the distal end side is connected to the ear canal b. The auricle insertion part 5 is exposed to one end, and is connected to the auricle insertion part 5 via a bent part 6 and extends downward from the auricle a along the outer surface of the auricle a. An extending tube body 7 is provided.

  And the pinna insertion part 5 comprised in the one end part of the acoustic tube 2 has the bending part 6 with which the pipe | tube main body 7 is connected when the front-end | tip part side faces the ear canal b and it mounts | wears with the pinna a. It is formed in a length sufficient to face the surface of the pinna a. The tube body 7 is connected to the auricle insertion part 5 via a bent part 6 having an acute angle that is substantially 90 degrees or less than 90 degrees. The other end 8 side of the tube body 7 facing the side where the auricle insertion part 5 is connected is bent in a U shape so as to rise toward the bent part 6 side. The other end portion 8 is bent in the direction opposite to the protruding direction of the auricle insertion portion 5. Thus, by bending the tube main body 7 extending outside the pinna a into a U shape, the occupied area can be reduced while sufficiently increasing the length of the acoustic tube 2.

Further, the distal end portion 5a side of the auricle insertion portion 5 that is inserted into the auricle a at the time of wearing and faces the distal end portion at the entrance of the ear canal b is arranged in the axial direction O of the tube body 7 as shown in FIG. Inclined upward at an inclination angle θ _{1 of} about 10 degrees with respect to the orthogonal plane S _{1 and at} about 10 degrees with respect to a plane S ₂ parallel to the axial direction O of the tube body 7 as shown in FIG. Inclined in the horizontal direction with an inclination angle θ ₂ . In this way, by inclining the distal end portion 5a of the auricle insertion portion 5 with respect to the tube main body 7, the tube main body 7 is extended along the surface of the auricle a while being inclined with respect to the surface of the auricle a. It can be inserted parallel to the ear canal b extending into the head.

When the acoustic tube 2 is attached to the auricle with the tip of the auricle insertion part 5 facing the entrance of the ear canal b, the reflected sound reflected from the eardrum is reflected by the tip of the auricle insertion part 5 or the like. As shown in FIG. 5, it is formed to have an inner diameter r ₂ that is substantially equal to the diameter r ₁ of a standard human ear canal b. The outer diameter _{r 3} of the acoustic tube 2 is formed as a substantially 6 mm. This is because the acoustic tube 2 formed by molding a synthetic resin is formed with a thickness sufficient to guarantee the mechanical strength.

  As shown in FIGS. 1 and 2, the distal end portion of the auricle insertion portion 5 provided in the acoustic tube 2 is fitted to the entrance of the ear canal b to close the ear canal b when attached to the auricle a. At the same time, an auricle attachment body 10 formed of a material having elasticity such as rubber that realizes stable attachment of the acoustic tube 2 to the auricle a is attached.

  As shown in FIG. 7, the auricle attachment body 10 includes a cylindrical attachment portion 11 that fits on the outer peripheral side of the distal end portion of the auricle insertion portion 5, and an ear canal that is formed on the outer peripheral side of the attachment portion 11. The fitting body 12 is provided. The ear canal fitting body 12 has one end connected to the distal end of the attachment portion 11, is bent so as to be bent toward the proximal end side of the attachment portion 11, and is formed so as to bulge outward. Thus, it is formed on the outer peripheral side of the mounting portion 11. That is, the ear canal fitting body 12 as a folded portion formed so as to be folded from the tip end portion of the attachment portion 11 has one end portion on the insertion side to the ear canal b as a connection portion to the attachment portion 11, It is formed integrally with the attachment portion 11 so as to bulge into a substantially spherical shape so as to cover the outer peripheral side of the attachment portion 11 with the other end side that is an opening as a free end. Since the ear canal fitting body 12 is formed of an elastic material such as rubber with one end serving as a connecting portion to the mounting portion 11 and the other end being a free end, the connecting portion to the mounting portion 11 is inserted. When fitted to the ear canal b as an end, it is easily elastically deformed along the ear canal b and fitted to the ear canal b.

  An engagement groove 14 is provided on the inner peripheral surface of the attachment portion 11 to engage with the engagement protrusion 13 that protrudes from the outer peripheral surface of the auricle insertion portion 5. The auricle attachment body 10 is configured such that the mounting position relative to the auricle insertion portion 5 is determined by engaging the engagement groove 14 with the engagement protrusion 13 and fitting the attachment portion 11 to the auricle insertion portion 5. It is attached while being prevented from coming off from the auricle insertion part 5.

  By the way, it is desirable that the ear canal fitting body 12 be easily elastically deformed following the ear canal b so that the ear canal b can be sealed when fitted to the ear canal b. On the other hand, since the attachment part 11 of the auricle attachment body 10 is for reliably supporting the auricle attachment body 10 to the auricle insertion part 5, it is desirable to form it so as to have a large elastic force. Therefore, the ear canal fitting body 12 is formed in a thin wall that can be easily elastically deformed, whereas the attachment portion 11 is thicker than the ear canal fitting body 12 so as to have a sufficient fitting holding force. Formed.

  In addition, the ear canal fitting body 12 and the attachment portion 11 of the pinna attachment body 10 may be integrally formed using different materials so that the respective functions can be sufficiently exhibited. For example, the ear canal fitting body 12 is formed of silicone rubber that can be easily elastically deformed, and the attachment portion 11 is formed of an elastic material such as rubber having a large elastic force.

  Further, as shown in FIG. 3, a reproduction sound incident hole 15 for allowing the reproduction sound radiated from the speaker unit 1 is made in the vicinity of the bent portion 6 of the acoustic tube 2. The speaker unit 1 is attached via a speaker attachment piece 16 protruding from one side edge of the reproduction sound incident hole 15.

  The speaker unit 1 mounted via the speaker mounting piece 16 is configured by housing an electrodynamic speaker 17 including a diaphragm and a magnetic circuit unit for driving the diaphragm in a capsule 18. As shown in FIG. 4, the capsule 18 has a curved surface 18 a that is uniformly curved and bulges in correspondence with the circular arc-shaped diaphragm that constitutes the speaker 17. In addition, a plurality of sound emission holes 19 are formed in the front surface of the capsule 18 for radiating reproduced sound radiated from the speaker 17 to the outside. Furthermore, a plurality of sound emitting holes 20 are also formed on the back side of the capsule 18 for radiating the reproduced sound radiated from the speaker 17 to the outside.

  As shown in FIG. 8, a cover plate 21 is attached to the back side of the capsule 18 so as to cover the sound emitting hole 20 on the back side. The cover plate 21 regulates the emission of the reproduced sound radiated from the back side of the speaker to the outside, and the reproduced sound radiated from the back side of the speaker enters the acoustic tube 2 to be heard. This prevents the sound quality from deteriorating.

  As shown in FIGS. 3 and 4, the speaker mounting piece 16 to which the speaker unit 1 configured as described above is mounted protrudes from the vicinity of the bent portion 6 substantially in parallel with the extension direction of the auricle insertion portion 5. ing. The speaker mounting piece 16 is formed in a disk shape having a size corresponding to the outer shape of the speaker unit 1 and has a concave bay shape corresponding to the curved surface 18a on the front surface side of the capsule 18 at the center. Is formed. A communication portion 23 that communicates with the reproduction sound incident hole 15 is formed on the connection side of the speaker unit attachment portion 22 to the acoustic tube 2 in a cutout manner. The speaker unit 1 is disposed on the speaker mounting piece 16 so that the curved surface 18 a of the capsule 18 is fitted to the speaker unit mounting portion 22. The speaker unit 1 disposed on the speaker mounting piece 16 is attached by bonding the curved surface 18a to the speaker mounting piece 16 via an adhesive or a double-sided adhesive tape. In this way, the speaker unit 1 is attached by joining the curved surface 18a on the front side of the capsule 18 to the speaker unit attachment portion 22, so that the attachment to the attachment piece 16 is ensured.

  As shown in FIG. 9, the speaker unit 1 attached to the speaker attachment piece 16 as described above has a part of a plurality of sound emission holes 19 formed on the front side of the capsule 18, for example, two sound emission holes 19. Is opposed to the communication portion 23. Then, the reproduced sound radiated from the speaker is incident on the acoustic tube 2 through the sound emitting hole 19 and the communication portion 23 facing the communication portion 23.

  Further, on the other end portion 8 side of the acoustic tube 2 bent into a U-shape, as shown in FIG. 5, there is a sound absorbing material 25 that absorbs the reflected sound that is reflected by the eardrum and enters the acoustic tube 2. The other end 8 is disposed as a non-reflection end of sound. The sound absorbing material 25 is formed by molding porous urethane foam, and has a substantially conical shape with a tapered tip. The sound absorbing material 25 is inserted into the acoustic tube 2 with the distal end side of the distal end tapered as an insertion end, and is fitted to the other end portion 8. The sound absorbing material 25 is joined into the acoustic tube 2 with an adhesive as necessary in order to fix the arrangement position.

  The microphone unit 3 that collects the sound of the external environment is attached to the other end portion 8 of the acoustic tube 2 via the microphone support member 26. The microphone unit 3 used here is configured by accommodating a microphone element in a cylindrical microphone capsule 27. As shown in FIG. 3, a plurality of sound collecting holes 28 are formed on the sound collecting surface side of the microphone capsule 27 facing the diaphragm of the microphone element. The sound of the external environment enters the microphone capsule 27 through the sound collection hole 28 and is collected by the microphone element.

  A microphone support member 26 for attaching the microphone unit 3 to the other end 8 of the acoustic tube 2 is integrated with a fitting projection 29 fitted to the other end 8 of the acoustic tube 2 and the tip of the fitting projection 29. The microphone holding portion 30 is formed in a circular arc shape formed in the above. The microphone unit 3 is held by the microphone support member 26 by fitting a cylindrical microphone capsule 27 into the microphone holding unit 30. The microphone support member 26 can attach the microphone unit 3 to the acoustic tube 2 by fitting the fitting protrusion 29 to the other end 8 of the acoustic tube 2.

  By the way, as shown in FIG. 8, the microphone unit 3 is attached to the acoustic tube 2 with the direction opposite to that of the speaker unit 1 supported by the acoustic tube 2 via the attachment piece 16. That is, the microphone unit 3 is disposed so that the sound collection surface of the microphone unit 3 and the sound emission surface of the speaker unit 1 face each other. Thus, by reversing the directions of the microphone unit 3 and the speaker unit 1, the reproduction sound radiated from the speaker unit 1 is prevented from entering the microphone unit 3, and the resonance of the reproduction sound reproduced by the speaker unit 1 is suppressed. Can be prevented.

  Note that the microphone unit 3 and the speaker unit 1 are only required to be arranged in such a direction that the reproduced sound radiated from the speaker unit 1 is prevented from entering the microphone unit 3, and the sound collection surface and the sound emission surface are orthogonal to each other. You may arrange | position.

  By the way, since the microphone support member 26 is fitted to the other end portion 8 of the acoustic tube 2, the end of the acoustic tube 2 may be blocked. Therefore, the sound radiated to the other end 8 side of the acoustic tube 2 cannot be radiated to the outside of the acoustic tube 2. In view of this, a side hole on the other end 8 side of the acoustic tube 2 is provided with a hole 31 for radiating sound transmitted to the other end 8 side of the acoustic tube 2 to the outside. In order to make it difficult for the sound radiated through the hole 31 to be incident on the microphone unit 3, the hole 31 has a surface on which the sound collecting surface of the microphone unit 3 faces as shown in FIGS. 2 and 4. Is formed on the side surface on the other end 8 side of the acoustic tube 2 located on the opposite side. By forming the punch hole 31 at such a position, even if the earphone device attached to the auricle is covered with a hand, it is maintained in an open state and radiates through the punch hole 31. Sound is less likely to be collected by the microphone unit 3, and resonance of reproduced sound reproduced by the speaker unit 1 can be prevented.

  As described above, the speaker unit 1 and the microphone unit 3 attached to the acoustic tube 2 are disposed in the housing 4 constituting the earphone main body that is disposed so as to cover the middle portion of the acoustic tube 2 including the bent portion 6. It is stored in. As shown in FIGS. 3 and 4, the housing 4 is composed of a pair of front side half 32 and back side half 33 formed by molding synthetic resin.

  As shown in FIGS. 3 and 4, fitting recesses 34 and 35 into which the acoustic tube 2 is fitted are formed on the facing surface sides of the front side half 32 and the back side half 33 that constitute the housing 4. ing. The front-side half 32 houses the speaker housing recess 36 that houses the magnetic circuit unit 1 a side that projects to the back side of the speaker unit 1 attached to the speaker mounting piece 16, and the sound collection surface side of the microphone unit 3. A microphone housing recess 37 is formed to bulge. The microphone housing recess 37 is provided with a plurality of minute incident holes 38 for allowing the sound of the external environment to enter. In addition, the rear half 33 is provided with a cord holding portion 41 that holds the external connection cord 39 drawn out from the speaker unit 1 and the microphone unit 3 and positions the drawing direction of the external connection cord 30. The cord holding portion 41 is formed so as to bulge from the side surface of the back side half 33 by forming a cord insertion portion 42 at an end portion. The external connection cord 39 is inserted into a cord insertion portion 42 formed at the end of the cord holding portion 41 and extended outside the housing 4.

  Note that a bushing 43 formed of flexible rubber or the like is fitted into a portion of the external connection cord 39 drawn from the cord insertion portion 42. The bushing 43 is for preventing a large bend at a portion where the external connection cord 39 is pulled out from the cord insertion portion 42 and preventing disconnection.

  The external connection cord 39 drawn from the speaker unit 1 serves as an input line for the audio signal to the speaker unit 1, and the external connection cord 39 drawn from the microphone unit 3 outputs the audio signal collected by the microphone unit 3. Line.

The cord holding part 41 may be formed separately from the back side half 33 and attached integrally to the side surface of the back side half 33. In this case, the back side half 33 is provided with a cord lead-out hole communicating with the cord insertion portion 42 provided in the cord holding portion 41. By forming the cord holding part 41 separately from the back side half 33 in this way, the cord holding part 41 can be formed of a material different from the back side half 33 formed of a rigid synthetic resin material. it can. The cord holding portion 41 is formed of flexible rubber or the like so as to obtain a good wearing feeling even when it is in contact with a part of the auricle when worn on the auricle. Can do.

  Further, the front-side half 32 and the back-side half 33 constituting the housing 4 are inserted into the proximal end portion side of the auricle insertion portion 5 formed on one end portion side of the acoustic tube 2, and the insertion restriction portion half body 44 is fitted. , 45 are formed. These insertion restricting part halves 44 and 45 constitute an auricle insertion restricting part 46 having a diameter larger than that of the acoustic tube 2 when they are brought into contact with each other.

  The front-side half 32 and the back-side half 33 configured as described above are arranged opposite to each other with the acoustic tube 2 interposed therebetween, and the fitting recesses 34 and 35 provided in the halves 32 and 33 are provided with the acoustic tube 2. When the midway portion is fitted and the butted surfaces 32a and 33a are butted and joined to each other, as shown in FIGS. 1 and 2, an integrated housing 4 is configured so as to cover the midway portion of the acoustic tube 2. . At this time, the auricle insertion portion 5 formed at one end portion of the acoustic tube 2 protrudes from one side surface of the upper end side of the housing 4, and includes the other end portion 8 curved in a U shape from the lower end side of the housing 4. The tube main body 7 is in a protruded state. In the housing 4, as shown in FIG. 8, the speaker unit 1 is fitted into the speaker housing recess 36 provided in the front half 32, and the microphone unit 2 is fitted into the microphone housing recess 37 and stored. The Further, when the front side half 32 and the rear side half 33 are butted and joined to form the housing 4, the diameter of the housing 4 is larger than that of the acoustic tube 2 on the proximal end side of the auricle insertion portion 5 protruding from one side surface of the upper end side. An auricle insertion restricting portion 46 is formed.

  By the way, a gap is provided between the sound collection surface 3a of the microphone unit 3 housed in the housing 4 and the bottom surface of the microphone housing recess 37. As shown in FIG. An air screen 45 made of a nonwoven fabric or the like for preventing wind noise generated when sound is collected through an incident hole 38 formed in the recess 37 is disposed. Further, although not shown, a sound absorbing material made of urethane foam or felt is disposed between the microphone unit 3 and the housing 4. The sound absorbing material absorbs vibration transmitted to the microphone unit 3 through the housing 4. By providing the sound absorbing material in this manner, the microphone unit 3 can collect external environmental sound without collecting noise.

  As shown in FIG. 10, the earphone device configured as described above fits the auricle attachment body 10 attached to the distal end portion of the auricle insertion portion 5 provided on one end side of the acoustic tube 2 to the ear canal b. Then, the tube main body 7 of the acoustic tube 2 is mounted so as to hang down along the surface of the pinna a. At this time, the ear canal fitting body 12 of the pinna attachment body 10 is fitted into the ear canal b as shown in FIG. 11 while being elastically deformed. Since the ear canal fitting body 12 is formed of rubber or the like that easily elastically deforms, the ear canal fitting b is deformed in accordance with the shape of the ear canal b to seal the ear canal b. In this way, when the earphone device is worn, the ear canal b is sealed by the ear canal fitting body 12 of the pinna attachment body 10, so that the incidence of external sound other than the reproduced sound radiated from the earphone device is suppressed. Let

  Further, when the earphone device is attached to the auricle a, the sound collection surface of the microphone unit 3 faces outward with respect to the auricle a as shown in FIG. 10, so that sound from the external environment can be collected efficiently. Can do. Furthermore, when the earphone device is attached to the auricle a, the cord holding portion 41 is located on the back side of the housing 4 facing the auricle a as shown in FIG. And is pulled out of the space between the housing 4. Therefore, the external connection cord 39 can be pulled out below the pinna a without protruding from the earphone device. And by making the code | cord | chord holding | maintenance part 41 long, since the external connection code | cord 39 can be pulled out below the pinna a, without contacting the pinna a, the stable mounting state is obtained.

  Furthermore, when the earphone device is attached to the auricle a, as shown in FIG. 11, the distal end of the auricle insertion restricting portion 46 formed larger in diameter than the acoustic tube 2 on the proximal end side of the auricle insertion portion 5. The surface 46a contacts the bottom of the concha cavity c of the pinna a. Therefore, excessive insertion of the auricle insertion part 5 having rigidity into the ear canal b is restricted and can be safely worn.

  The earphone device described above houses an auricle attachment body 10 including an ear canal fitting body 12 that seals the ear canal b, and an auricle insertion restriction portion 46 that restricts insertion of the auricle insertion portion 5 into the ear canal b. 4, the auricle attachment body 10 and the auricle insertion restricting portion 46 are formed as independent members. However, the auricle attachment body 10 and the auricle insertion restriction portion 46 are integrally formed. It's okay. In this case, the auricle insertion restricting portion 46 formed on the housing 4 side is removed.

  Hereinafter, an embodiment in which an auricle fitting body and an auricle insertion restricting portion are integrally formed will be described with reference to the drawings.

  In the following description, members that are the same as those in the above-described embodiments will be denoted by common reference numerals, and detailed description thereof will be omitted.

  The earphone device shown here shows an auricle attachment body 53 in which an auricle fitting body 51 and an auricle insertion restricting portion 52 that are at least partially fitted to the ear canal b and seal the ear canal b are integrally formed. 12 and FIG. 13, the acoustic tube 2 is attached to the distal end side of the auricle insertion portion 5 configured on one end side.

  As shown in FIG. 14, the auricle attachment body 53 used here is formed on a cylindrical attachment portion 54 that fits on the outer peripheral side of the tip portion of the auricle insertion portion 5 and on the outer peripheral side of the attachment portion 54. The ear canal fitting body 51 and the auricle insertion restricting portion 52 formed on the base end side of the attachment portion 54 are integrally formed by molding an elastic material such as rubber.

  The ear canal fitting body 52 has one end connected to the distal end side of the attachment portion 54 and is formed to bend and bulge toward the proximal end side of the attachment portion 54. Is formed. That is, the ear canal fitting body 52 is formed so that one end portion on the insertion side to the ear canal b is a connecting portion to the attachment portion 54 and the other end side is a free end so as to cover the outer peripheral side of the attachment portion 54. It is formed integrally with the mounting portion 54 so as to bulge into a spherical shape.

  The auricle insertion body 53 and the auricle insertion restriction part 52 that regulates the insertion position of the auricle insertion part 5 to which the auricle attachment body 53 is attached to the ear canal b are larger in diameter than the outer diameter of the acoustic tube 2. Thus, at least a size that cannot be inserted into the ear canal b is formed so as to bulge toward the proximal end side of the mounting portion 54. The auricle insertion restricting portion 52 is formed in a shape that is fitted so as to be locked to the concha cavity c when the earphone device is attached to the auricle a. As shown in FIG. 13, an engaging protrusion 55 that protrudes to the side and engages with a part of the concha conchae c is provided.

  Engaging protrusions 57 and 58 projecting from the outer peripheral surface of the auricle insertion portion 5 are relatively engaged with the inner peripheral surface of the fitting hole 56 formed from the attachment portion 54 to the auricle insertion restriction portion 52. Engaging engagement grooves 59, 60 are provided. The auricle attachment body 53 is attached to the outer peripheral side of the auricle insertion part 5 by being fitted to the auricle insertion part 5 through the fitting hole 56. At this time, the engaging grooves 59 and 60 provided on the inner peripheral surface of the fitting hole 56 are relatively engaged with the engaging protrusions 57 and 58 provided on the outer peripheral surface of the auricle insertion portion 5 as shown in FIG. As a result, the attachment position with respect to the auricle insertion portion 5 is positioned, and the attachment from the auricle insertion portion 5 is prevented and attached.

  As shown in FIG. 14, a ring-shaped flange portion 61 that covers the distal end surface of the auricle insertion portion 5 is formed at the distal end portion of the attachment portion 54. The flange portion 61 prevents the distal end portion of the rigid attachment portion 54 from coming into direct contact with the ear canal b when attached to the auricle a so as to obtain a feeling of wearing a large amount.

  By the way, it is desirable that the ear canal fitting body 51 is formed so as to be easily elastically deformed following the ear canal b so that the ear canal b can be sealed when fitted to the ear canal b. On the other hand, since the attachment part 54 of the auricle attachment body 53 is for reliably supporting the auricle attachment body 53 on the auricle insertion part 5, it is desirable that the attachment part 54 be formed to have a large elastic force. In addition, since the pinna insertion restricting part 52 is fitted into the concha cavity c to restrict the insertion position of the pinna insert 51 and the pinna insertion part 5 with respect to the pinna b, it is easily elastic. It is desirable to form so as not to deform.

  Therefore, the ear canal fitting body 51 is formed thin so that it can be easily elastically deformed, whereas the attachment portion 54 is thicker than the ear canal fitting body 51 so as to have a sufficient fitting holding force. Formed. The auricle insertion restricting portion 52 is also formed thick so as not to be easily elastically deformed.

Further, the ear canal fitting body 51, the attachment portion 54, and the pinna insertion restricting portion 52 of the pinna attachment body 53 may be integrally formed using different materials so that the respective functions can be sufficiently exhibited. For example, the ear canal fitting body 51 is formed of silicone rubber that can be easily elastically deformed, and the attachment portion 11 and the auricle insertion restricting portion 52 are formed of an elastic material such as rubber having a large elastic force.

  As shown in FIG. 15, the earphone device in which the auricle attachment body 53 configured as described above is attached to the distal end portion of the auricle insertion portion 5 provided on one end side of the acoustic tube 2 has the auricle attachment body 53. While fitting into the ear canal b, the engaging protrusion 55 is locked to a part of the concha cavity c, and the auricle insertion restricting portion 52 is fitted into the concha cavity c, so that the tube of the acoustic tube 2 The main body 7 is mounted so as to hang down along the surface of the pinna a. At this time, as shown in FIG. 15, the ear canal fitting body 12 of the pinna attachment body 53 is fitted into the ear canal b while being elastically deformed to seal the ear canal b. At this time, since the engaging protrusion 55 provided in the pinna insertion restricting portion 52 is locked to a part of the concha cavity c, the ear canal fitting body 51 and the pinna insertion portion 5 with respect to the ear canal b are used. Regulate the amount of insertion. Therefore, excessive insertion of the ear canal fitting body 51 and the pinna insertion part 5 having rigidity into the ear canal b is restricted and can be safely mounted.

  The earphone device described above includes the microphone unit 3 together with the speaker unit 1, reduces noise incident from the outside of the earphone device, suppresses distortion of reproduced sound radiated from the speaker unit 1, and has good reproduction characteristics. Although an example of application to a so-called noise reduction type earphone device that enables listening is described, the speaker unit 1 and the non-reflective sound that causes the reproduced sound radiated from the speaker unit 1 to enter the auricle The present invention can also be applied to an earphone device provided with the tube 2 as it is.

It is the perspective view which looked at the earphone device concerning the present invention from the field where the sound emitting surface of a microphone unit faces. It is the perspective view which looked at the above-mentioned earphone device from the cord holding part side. It is the disassembled perspective view which looked at the said earphone apparatus from the surface where the sound emission surface of a microphone unit faces. It is the disassembled perspective view which looked at the said earphone apparatus from the cord holding part side. It is a front view which shows the inclination state of an auricle insertion part. It is a top view which shows the inclination state of an auricle insertion part. It is a front view which fractures | ruptures and shows the state which attached the pinna mounting body to the pinna insertion part. It is a longitudinal cross-sectional view which shows the state which attached the speaker unit and the microphone unit in the housing. It is sectional drawing which shows the attachment state to the speaker attachment piece of a speaker unit. 1 is a perspective view showing a state where an earphone device according to the present invention is attached to an auricle. It is a rear view which fractures | ruptures and shows the state which fitted the pinna mounting body in the ear canal. It is the perspective view which looked at the other example of the earphone apparatus which concerns on this invention from the surface where the sound emission surface of a microphone unit faces. It is the perspective view which looked at the other example of the said earphone apparatus from the code holding part side. It is sectional drawing which shows the integrated auricle mounting body attached to the said earphone apparatus. It is a rear view which shows the state which mounted | worn the said earphone apparatus to the auricle partly fractured | ruptured.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Speaker unit, 2 Acoustic tube, 4 Housing, 5 Auricle insertion part, 10 Auricle mounting body, 12 Ear canal fitting body, 17 Speaker, 18 capsule, 18a Curved surface

Claims (2)

An outer housing for storing the diaphragm,
While releasing the sound emitted from the diaphragm to the outside, an acoustic tube having an auricle insertion part at the tip,
An auricle attachment attached to the auricle insertion part of the acoustic tube,
The auricle wearing body is
A cylindrical mounting portion that can be fitted to the auricle insertion portion;
An ear canal fitting body formed of a material having elasticity apart from the outer periphery of the mounting portion;
One end portion of the ear canal fitting body is connected to one end portion of the attachment portion,
The other end portion of the ear canal fitting body is a free end,
The auricle insertion portion has a substantially linear shape and protrudes from the outer casing in a direction substantially parallel to a surface on which the diaphragm extends ,
The direction in which sound is emitted from the diaphragm is a direction substantially perpendicular to the surface on which the diaphragm extends,
The earphone device, wherein an outer peripheral surface of the outer casing is formed with a surface substantially parallel to a surface on which the diaphragm extends at a position facing the diaphragm.   The earphone device according to claim 1, wherein the diaphragm is selected to have a diameter larger than a diameter of the acoustic tube.

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