JP2010283643A - Earphone device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily settle a case body at the cavum conchae side, to also reduce protrusion to the outside and to also improve wearing feeling. <P>SOLUTION: A vibrating film 39 is supported inside a case body 33. In the case body 33, a sound hole 45 is formed for guiding a sound generated by vibration of the vibrating film 39 toward the outside. A driving portion 43 is disposed to be positioned between the vibrating film 39 and the sound hole 45. The driving portion 43 includes a coil 41 which is supported by the vibrating film 39 and extends from the vibrating film 39 toward the sound hole 45, and a magnet 37 which is supported inside the case body 33 to be positioned between the vibrating film 39 and the sound hole 45 and faces the coil 41. The driving portion 43 is formed to have a smaller diameter than that of the vibrating film 39, and the case body 33 is formed, as a wearing portion 33b, to have a smaller diameter at a side from the driving portion 43 to the sound hole 45 than that at a side of the vibrating film 39. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an earphone device, and more particularly to an improvement of an earphone device that is used as an ear concha space-mounted earphone, an ear canal insertion earphone, an ear-mounted small headphone, or the like.

  Conventionally, as this type of earphone device, for example, as shown in FIG. 7, one end surface of a columnar magnet 5 is fixed in a cup-shaped yoke 3 disposed in a case body 1, and the other end surface of the magnet 5 A thin vibrating membrane 7 is fixed to the tip of the yoke 3 so as to face each other with a gap therebetween, covering the opening of the yoke 3, and a cylindrical coil 9 fixed to the vibrating membrane 7 is slightly attached to the outer periphery of the magnet 3 A configuration in which an insertion is arranged at intervals is well known.

  In FIG. 7, the case body 1 includes a funnel-shaped base 1a and a front cover 1b that covers the tip (right side in the figure), and the opening tip of the yoke 3 is fixed in the front cover 1b. Reference numeral 11 denotes a plurality of sound holes formed on the front surface of the vibration film 7 and penetrates the front cover 1b. Reference numeral 13 denotes a cable led out to the outside, and a knot 13a is formed in the base 1a.

  In this earphone device, the driving unit 15 that vibrates the vibration film 7 is formed by the magnet 5 and the coil 9, and the sound signal is generated by vibrating the vibration film 7 by applying an audio signal to the coil 9 from the outside with the cable 13. The transmitted sound is propagated from the sound hole 11 on the front surface of the diaphragm 7 to the outside.

  This type of earphone device is actually commercialized with a concha cavity-mounted type, an external ear canal insertion type, an ear-mounted type, or an ear covering type.

  That is, as shown in FIG. 8, for example, as shown in FIG. 8, the concha cavity-mounted earphone device places the vibrating membrane 7 in the concha cavity 23 surrounded by the tragus 17, the rosicle 19, and the concha 21. The case main body 1 is inserted and used so as to be close to 21. FIG. 8 shows a state where the earphone device is worn on the left ear (hereinafter, the same kind of drawings are the same).

  For example, as shown in FIGS. 9 and 10, the ear canal insertion-type earphone device has a configuration in which the configuration of FIG. 7 is slightly changed, and a case is provided in the ear canal 25 extending from the concha cavity 23 to the eardrum (not shown). A coaxial type (see FIG. 9) having a configuration in which a sound passing cylinder 27 projecting from the main body 1 is inserted and used, the center axis of the sound passing cylinder 27 being aligned with the center axis of the diaphragm 7; There is a non-coaxial type (see FIG. 10) in which the central axis of the sound passage cylinder 27 is obliquely set to the central axis of the vibration film 7.

  Reference numeral 29 in the drawing is a flexible ear tip fitted on the outer periphery of the sound passage cylinder 27 and is elastically brought into contact with the inner wall of the ear canal 25.

  Furthermore, as shown in FIG. 11 and FIG. 12, for example, the ear-mounted earphone device and the ear covering earphone device have a configuration in which the configuration of FIG. 7 is slightly changed. 19 is used so as to close the concha cavity 23 against the ear 19, or is used so as to close the concha cavity 23 including the tragus 17 and the pearl 19, and is small or large. It is commercialized with a headphone configuration. In addition, the code | symbol 31 in FIG. 11 and FIG. 12 is the ring-shaped buffer pad attached to the case main body 1 outer periphery.

  Incidentally, as publicly known examples of the ear concha space-mounted earphones, JP-A-8-172691 (Patent Document 1) and JP-A-10-66181 (Patent Document 2) are known examples of ear canal insertion type earphones. Japanese Patent Laid-Open No. 2000-341784 (Patent Document 3) discloses Japanese Patent Laid-Open No. 2001-1102081 (Patent Document 4) as a publicly known example of an earphone, and Japanese Patent Laid-Open No. 11- No. 331972 (Patent Document 5).

JP-A-8-172691 Japanese Patent Laid-Open No. 10-66181 JP 2000-341784 A JP 2001-112081 A Japanese Patent Laid-Open No. 11-331972

  However, any of the above-described known configurations are mounted so that the front surface side of the diaphragm 7 having a large diameter is brought close to and opposed to the user's concha 21 and within the concha cavity 23 or so as to close it. Although the configuration is such that the drive unit 15 side (the back side of the vibrating membrane 7) in which the magnet 5 having a small diameter is housed to form a magnetic circuit is used outward, there are the following disadvantages.

  That is, when the case main body 1 is mounted in the user's concha cavity 23, the outer surface of the front cover 1b is almost flat, so that a gap is easily generated between the front cover 1b and the concha 21 and this is dead. It becomes a space and the mountability is lowered, or the base 1a side of the case body 1 tends to protrude to the outside in the mounted state.

  For this reason, when used while lying down, the base 1a of the case body 1 hits a pillow or the like, and the ears are compressed, and the feeling of use deteriorates. When used outdoors, a part of the case body 1 is removed from the auricle. Wind noise caused by the protrusion increases, and the area of the protruding portion visible from the outside is small, which makes it difficult to display such as printing.

  In particular, in the concha cavity-mounted earphone device, as shown in FIG. 8, the large-diameter outer peripheral portion of the case body 1 is brought into contact with and stored in the concha cavity 23. An air gap is easily generated between the upper 21 and the stability of wearing is not good.

  Furthermore, as shown in FIG. 13, depending on the wearing mode, a part of the case body 1 can easily enter the ear canal 25 side, and the direction of the emitted sound is deviated from the ear canal 25 and the acoustic effect is also reduced along with a decrease in stability. Easy to do.

  Further, in the ear-mounted earphone device and the ear covering earphone device, the driving unit 15 on the back side of the vibration film 7 is likely to protrude greatly to the outside, and there is the same difficulty as described above.

  The present invention has been made to solve such a problem, and the case main body can be easily accommodated on the concha cavity side, the protrusion to the outside can be reduced, the wearability is good, and the sound quality is improved. An object of the present invention is to provide an earphone device that does not easily deteriorate.

  In order to solve such a problem, an earphone device according to claim 1 of the present invention is formed on a case main body, a vibration film supported in the case main body, and the case main body so as to face the vibration film. A sound passage hole for guiding the sound generated by the vibration of the vibration membrane to the outside, a coil supported by the vibration membrane and extending in the direction of the sound passage hole, and located between the vibration membrane and the sound passage hole A magnet that is supported in the case body and faces the coil, and has a drive unit that drives the diaphragm by an audio signal applied to the coil, the drive unit being formed with a smaller diameter than the diaphragm, The case body has a mounting portion in which the sound passage hole side is formed to have a smaller diameter than the vibration membrane side from the drive portion.

  The earphone device according to claim 2 of the present invention has a configuration in which the mounting portion of the case main body forms an insertion portion that is inserted into the concha cavity of the user.

  In the earphone device according to claim 3 of the present invention, the cable for applying the audio signal to the coil from the outside is led out from the case main body in the lateral direction between the diaphragm and the sound passage hole.

  In such an earphone device according to claim 1 of the present invention, since the sound passage hole side of the case main body is formed with a smaller diameter than the vibration membrane side and serves as an attachment portion to the ear, The whole or a part is easy to fit in the concha cavity side, the protrusion to the outside can be made small, the wearability is good, and the sound quality is hardly deteriorated.

  In the earphone device according to claim 2 of the present invention, the mounting portion of the case main body forms an insertion portion to be inserted into the concha cavity, so that the wearability is further improved and the protrusion to the outside is small. Is possible.

  In the earphone device according to claim 3 of the present invention, a cable for applying an audio signal to the coil from the outside is led out laterally from the case body between the diaphragm and the sound passage hole. The cable can be led out through a recess between the pearl and the pearl, and the usability is also good.

  Hereinafter, embodiments of an earphone device according to the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the part which is common about the structure of a user's ear.

  FIG. 1 is a longitudinal sectional view showing an embodiment of an earphone device according to the present invention.

  In FIG. 1, a relatively flat case main body 33 is formed of a base portion 33a formed into a flat cap shape and a cup-shaped mounting portion 33b covered with the base portion 33a, both of which are synthetic resins. And is integrated by an adhesive (not shown).

  The mounting portion 33b forms a bulged portion that is chevron-shaped or curved so that the tip side (the lower side in FIG. 1) has a smaller diameter than the base portion 33a.

  A yoke 35 formed in a concave shape from a magnetic plate is disposed in the case main body 33 so as to be supported by the base portion 33a, and the flat top portion 35a of the yoke 35 abuts against the tip portion 33c of the mounting portion 33b. ing.

  A cylindrical magnet 37 is disposed in the yoke 35 with one end face (lower face in FIG. 1) fixed to the inner bottom 35a.

  On the upper side of the other end surface (upper surface in FIG. 1) of the magnet 37, a thin film-like vibration film 39 is fixed so as to cover the opening of the yoke 35 so as to face the magnet 37 with a small gap.

  A cylindrical coil 41 is fixed at the center of the vibration film 39 on the magnet 37 side, and is inserted into the outer periphery of the magnet 37 with a slight gap. The drive part 43 which vibrates the vibration film 39 by 35, the magnet 37, the coil 41, etc. is formed.

  In the flat inner bottom 35 a of the case body 33 and the yoke 35, a plurality of sound passage holes 45 are formed through the periphery of the magnet 37.

  In the base portion 33a of the case main body 33, the cable 47 is led out from a position corresponding to between the vibration film 39 and the sound passage hole 45, and extends inside the protective cylinder 33d extending integrally from the base portion 33a and led out to the outside.

  1, reference numeral 47a is a knot of the cable 47 in the protective cylinder 33d, and reference numeral 47b is a lead wire of the cable 47. This lead wire 47b is connected to a circuit (not shown) formed in the yoke 35, and the yoke 35 To the coil 41 by a circuit (not shown) on the vibrating membrane 39.

  In this earphone device, an audio signal is applied to the coil 41 via the cable 47, so that the vibration film 39 vibrates and produces sound, and the sound propagates to the outside from the sound passage hole 45 of the mounting portion 33b in the case body 33. It is supposed to be.

  In the earphone device according to the present invention, when attention is paid to the vibration film 39, the base 33 a side of the case body 33, that is, the yoke 35 side is the back surface side, and the magnet 37 and the coil 41 side forming the drive unit 43 are the front surface. The smaller diameter mounting portion 33b is used close to the user's ear.

  FIG. 2 shows the earphone device according to the present invention mounted on the concha cavity. The configuration of FIG. 1 is slightly modified, and is surrounded by the tragus 17, the antipoda 19, and the concha 21. A use state in which the case body 33 is housed in the concha cavity 23 is shown. Illustration of the cable 47 and the protective cylinder 33d is omitted.

  As can be seen from FIG. 2, in the earphone device according to the present invention, the drive unit 15 side of the case main body 33 is a mounting portion 33 b having a smaller diameter than the vibration film 39, and forms a mountain-shaped or curved bulging portion. ing.

  When the user wears the earphone device on his / her ear, the case main body 33 easily fits in the concha cavity 23 surrounded by the tragus 17, the rosicle 19, and the concha 21, Since the dead space does not easily occur and the base portion 33a hardly protrudes to the outside or is hardly protruded, it is easy to reduce the case main body 33 portion protruding to the outside from the position where the user's tragus 17 and the counter bead 19 are connected.

  Therefore, the sense of stability of the earphone device is good, and it is difficult for a part of the case body 33 to enter the ear canal 25 side, and the case body 33 hits a pillow or the like even when lying down while lying down. Even if used outdoors, it is difficult for the wind noise to increase.

  Moreover, in the earphone device according to the present invention, it is possible to make the diaphragm 39 as large as possible, and from this point, it is easy to ensure a wide frequency range of frequency characteristics.

  Furthermore, it is easy to increase the flat area of the case main body 33 that can be seen from the outside when the user wears the earphone device on the ear, and there is an advantage that it is easy to display printing or the like on this portion.

  Furthermore, since the vibration membrane 39 is attached to the back of the mounting portion 33b as viewed from the sound passage hole 45 side and is difficult to see, the entry of dust and the like from the sound passage hole 45 is prevented and the vibration membrane 39 is not easily attached. However, there is an effect that the vibration film 39 is hardly damaged by mischief or the like. This effect is more useful as the loudspeaker structure such as the vibration film 39 to be used becomes larger.

  In the earphone device of the present invention, one side is closed by the base portion 33a to which the vibrating membrane 39 is close, but a part of the base portion 33a is opened (not shown) to close the opening. If an acoustic resistance material such as compressed urethane or non-woven fabric is applied to the substrate, the acoustic characteristics can be controlled, and it can be used in the same manner as the conventional configuration.

  Next, with regard to the earphone device according to the present invention described above, the usage state when the external ear canal insertion type, the ear resting type or the ear covering type is actually constructed and commercialized is simply described with reference to FIGS. explain.

  3 and 4 show an earphone device of the ear canal insertion type. FIG. 3 shows a coaxial type and FIG. 4 shows a non-coaxial type.

  That is, in the ear canal insertion type earphone device shown in FIG. 3, a sound passage cylinder 47 as a sound passage hole is integrally protruded from the distal end portion 33c of the case body 33 in a state where the diaphragm 39 and the central axis are aligned. The flexible ear tip 49 is formed outside the sound passage cylinder 47 so that the sound passage cylinder 43 can be inserted into the ear canal 25.

  In the ear canal insertion type earphone device shown in FIG. 4, a sound passage cylinder 47 as a sound passage hole is integrally projected from the central axis of the vibration film 39 to the distal end portion 33c of the case body 33, A flexible ear tip 49 is arranged outside, and the sound passage cylinder 47 can be inserted into the ear canal 25.

  In any configuration, when the user wears the earphone device on the ear, the user can easily fit into the concha cavity 23 surrounded by the tragus 17, the antipodes 19, and the concha 21, and the above-described effects can be obtained. Easy.

  However, the loudspeaker configuration used in the earphone device (headphone) increases in size in the order of the external ear canal insertion type, the concha concavity, the ear-mounted type, and the ear cover type, and accordingly, is one of the effects of the present invention. Although the amount of protrusion of the appearance portion is relatively small, it is easier to project to the user's concha cavity 23 side than the conventional configuration, and has the advantages described above.

  5 and 6 show an earphone device (headphone) of an ear-mounting type or an ear covering type by slightly modifying the earphone device shown in FIG.

  That is, the configuration shown in FIG. 5 is a configuration in which a ring-shaped buffer pad 51 is arranged on the outer periphery of the joint portion between the base portion 33a and the mounting portion 33b forming the case main body 33, and is flat as a whole. The portion 33b is put on the user's tragus 17 and the rosicle 19 to close the concha cavity 23, and the ear pad type small size is used in contact with the buffer pad 51 in the vicinity of the tragus 17 and the rosicle 19. Headphone type.

  Furthermore, the configuration shown in FIG. 7 is an ear covering type in which the tragus 17 and the counter jewel 19 are largely covered with the mounting portion 33b, and the buffer pad 51 is used in contact with a portion slightly away from the tragus 17 and the anti tragus 19. Large headphone type.

  By the way, as a method of manufacturing the earphone device of the present invention, for example, the vibration film 39 is fixed to the yoke 35 and the drive unit 43 is formed, and after all these components are attached to the base 33a and assembled, sound quality / performance inspection is performed. Alternatively, adjustment or the like can be performed, and a mounting portion 33b having a protective cover function can be attached to such a base portion 33a, thereby improving production efficiency.

  In the earphone device of the present invention, as described above, the case main body 33 is not limited to a configuration in which the distal end side of the mounting portion 33b has a mountain-shaped or curved bulged portion so as to have a smaller diameter than the base portion 33a. The object of the present invention can be achieved if the diameter is smaller than that of the membrane 39 and the diameter of the sound passage hole 45 from the drive portion 43 is smaller than that of the vibrating membrane 39 and is closer to the user's mounting portion.

  In addition, the mounting portion 33 b of the case body 33 may be configured to cover the tragus 17 and the counter jewel 19 in addition to the configuration that forms an insertion portion that is inserted into the concha cavity 23 of the user.

  Further, in the earphone device of the present invention, in the configuration in which the cable 47 for applying an audio signal to the coil 41 from the outside is led out from the case body 33 between the vibration film 39 and the sound passage hole 45, for example, the case body Even if 33 is inserted into the user's concha cavity 23 and used, the cable 47 can be led out from the concave portion between the user's tragus 17 and the rosicle 19, and the usability is also good.

It is a cross-sectional view showing an embodiment of an earphone device according to the present invention. It is a schematic sectional drawing which shows the usage example of the earphone apparatus which concerns on this invention. It is a cross-sectional view showing another embodiment of the earphone device according to the present invention together with a usage example. It is a cross-sectional view showing another embodiment of the earphone device according to the present invention together with a usage example. It is a cross-sectional view showing another embodiment of the earphone device according to the present invention together with a usage example. It is a cross-sectional view showing another embodiment of the earphone device according to the present invention together with a usage example. It is sectional drawing which shows the conventional earphone apparatus. It is sectional drawing which shows the conventional earphone apparatus with the usage example. It is sectional drawing which shows another form of the conventional earphone apparatus with a usage example. It is sectional drawing which shows another form of the conventional earphone apparatus with a usage example. It is sectional drawing which shows another form of the conventional earphone apparatus with a usage example. It is sectional drawing which shows another form of the conventional earphone apparatus with a usage example. It is sectional drawing which shows the usage example of the conventional earphone apparatus.

1, 33 Case body 1a, 33a Base 1b Front cover 3, 35 Yoke (drive unit)
5, 37 Magnet (drive unit)
7, 39 Vibration membrane 9, 41 Coil (drive unit)
11, 45 Sound passage holes 13, 47 Cables 13a, 47a Knots 15, 43 Drive unit 17 Tragus 19 Pair 21 Ear concha 23 Concha cavity 25, External auditory canal 27, 47 Sound passage body (sound passage)
29, 49 Ear tips 31, 51 Buffer pad 33b Mounting part (insertion part)
33c Tip portion 33d Protection cylinder 35a Inner bottom portion 47b Lead wire

Claims (3)

The case body,
A vibrating membrane supported in the case body;
A sound passage hole that is formed in the case body so as to face the vibration film and guides the sound generated by the vibration of the vibration film toward the outside;
A coil that is supported by the vibration membrane and extends in the direction of the sound passage hole, and a magnet that is supported in the case body and faces the coil so as to be positioned between the vibration membrane and the sound passage hole. A drive unit that drives the vibrating membrane by an audio signal applied to
Comprising
The earphone device according to claim 1, wherein the driving unit is formed with a smaller diameter than the vibrating membrane, and the case main body is formed with a diameter smaller than the vibrating membrane side from the driving unit on the sound passage hole side. The earphone device according to claim 1, wherein the mounting portion of the case body forms an insertion portion that is inserted into a concha cavity of a user. The earphone device according to claim 1, wherein a cable for applying the audio signal to the coil from the outside is led out from the case body in a lateral direction between the vibration membrane and the sound passage hole.

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