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EP2701399B1 - Kopfhörer - Google Patents

Kopfhörer Download PDF

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Publication number
EP2701399B1
EP2701399B1 EP11863718.0A EP11863718A EP2701399B1 EP 2701399 B1 EP2701399 B1 EP 2701399B1 EP 11863718 A EP11863718 A EP 11863718A EP 2701399 B1 EP2701399 B1 EP 2701399B1
Authority
EP
European Patent Office
Prior art keywords
vibration
housing
earphone according
earphone
edge part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP11863718.0A
Other languages
English (en)
French (fr)
Other versions
EP2701399A1 (de
EP2701399A4 (de
Inventor
Shinsuke Konuma
Toru Nakamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Onkyo Corp
Original Assignee
Onkyo Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Onkyo Corp filed Critical Onkyo Corp
Publication of EP2701399A1 publication Critical patent/EP2701399A1/de
Publication of EP2701399A4 publication Critical patent/EP2701399A4/de
Application granted granted Critical
Publication of EP2701399B1 publication Critical patent/EP2701399B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1016—Earpieces of the intra-aural type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058—Manufacture or assembly
    • H04R1/1075—Mountings of transducers in earphones or headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H04R9/066—Loudspeakers using the principle of inertia

Definitions

  • the present invention relates to an earphone.
  • An earphone as described in the below-described patent literature 1 includes a unit having a leading sound tube and an ear tip mounted on the leading sound tube in the unit, wherein the ear tip is used while being inserted into the outer ear canal of a user.
  • Patent literature 1 Japanese Unexamined Patent Application Publication No. 2010-10885 . Further in-ear earphones with conventional ear tips are known from the prior art documents EP 1058 479 A2 , US 2011/0034218 A1 and US 2010/0296667 A1 .
  • a speaker unit of the earphone is held via an ear tip which is inserted into an outer ear canal, and therefore the speaker unit needs to be downsized to hold the speaker unit with an appropriate holding force.
  • a small-sized speaker unit has difficulty in acquiring vibrations in the required low sound range, and thus has a problem that a favorable sound quality cannot be acquired in the low sound range during the reproduction of a music source and so forth including the low sound range.
  • an ear tip included in the conventional insert-type earphone is designed focusing on the adhesion onto the inner surface of an ear canal (outer ear canal), and thus the compliance in the direction along the ear canal is small so that the low sound range cannot be effectively reproduced by vibrating the ear tip itself.
  • the objective of the present invention is to provide an earphone capable of reproducing the low sound range even if the earphone includes a relatively small speaker unit and thus to allow for the sound reproduction creating the feeling of being at a live performance by reproducing the low sound range even if the earphone is small.
  • an earphone according to the present invention includes at least the following configuration:
  • An earphone comprising: a vibration means which vibrates in an uniaxial direction; a housing which supports said vibration means and vibrates in response to the vibration of the vibration means; and an ear tip which is mounted on said housing, wherein said ear tip is arranged around said uniaxial direction and includes a vibration part which vibrates in response to the vibration of said housing and a holding part which holds said housing in ear canal.
  • FIG. 1 is a conceptual view showing a basic configuration of an earphone according to an embodiment of the present invention.
  • An earphone 1 comprises: a vibration means (vibration unit) 10 which vibrates in an uniaxial direction (direction of the X axis shown in the drawing); a housing 20 which supports the vibration means 10 and vibrates in response to the vibration of the vibration means 10; and an ear tip 40 mounted on the housing 20.
  • a vibration means vibration unit 10 which vibrates in an uniaxial direction (direction of the X axis shown in the drawing)
  • a housing 20 which supports the vibration means 10 and vibrates in response to the vibration of the vibration means 10
  • an ear tip 40 mounted on the housing 20.
  • the ear tip 40 is arranged around the uniaxial direction (direction of the X axis shown in the drawing), that is, around the vibration direction of the vibration means 10.
  • the ear tip 40 holds the housing 20 in an ear canal(outer ear canal) Y while vibrating by itself in response to the vibration of the housing 20, and has a vibration part 41 which vibrates in response to the vibration of the housing 20 and a holding part 42 which holds the housing 20 in ear canal.
  • the vibration means (hereinafter referred to as “vibration unit”) is supported by a vibration unit support 21 in the housing 20.
  • the vibration unit 10 is provided with a magnetic circuit 11 including a magnetic gap 11G, an excitation coil 13 positioned in the magnetic gap 11G, and a suspension 14 which supports the magnetic circuit 11 at the vibration unit support 21 of the housing 20.
  • the excitation coil 13 is fixed to the vibration unit support 21 of the housing 20 directly or via a support section 13A.
  • an excitation signal is input into the excitation coil 13 to vibrate the vibration unit 10 in the direction of the X axis and the vibration is transmitted to the housing 20 to vibrate the housing 20 in the direction of the X axis.
  • the ear tip 40 arranged around the vibration direction vibrates.
  • the holding part 42 that is the outer peripheral part of the ear tip 40 keeps in contact with the inner surface of the ear canal Y so that the vibration of the vibration part 41 creates a pressure fluctuation in the space Ys inside the ear canal Y, and the pressure fluctuation allows for the reproduction of the low sound range.
  • the holding part 42 of the ear tip 40 is held by the ear canal Y so that the entire circumference of the holding part 42 is arranged in close contact with the inner surface of the ear canal Y.
  • the space Ys inside the ear canal Y is hermetically or semi-hermetically sealed so that the vibration of the vibration part 41 of the ear tip 40 effectively creates a pressure fluctuation in the space Ys, and thus allows for higher quality reproduction of the low sound range by driving the volume of the hermetically or semi-hermetically sealed space Ys.
  • Fig. 2 is a view illustrating an example of more specific configuration of the earphone 1 according to an embodiment of the present invention.
  • the earphone 1 includes a speaker unit 30 and a vibration unit 10, which are housed in the housing 20.
  • the speaker unit 30 emits a sound in response to an audio signal and has a voice coil 31 to which the audio signal is input.
  • the voice coil 31 vibrates in the vibration direction (X-axis direction) of the vibration unit (vibration means) 10.
  • the speaker unit 30 includes a magnetic circuit 32 having a magnetic gap 32G and the voice coil 31 is arranged in the magnetic gap 32G.
  • the magnetic circuit 32 includes, for example, a magnet 32A, a yoke 32B and a plate 32C, and the magnetic gap 32G is formed between the yoke 32B and the plate 32C.
  • a diaphragm 33 is attached to the voice coil 31 and the diaphragm 33 is supported by a frame 34.
  • the frame 34 is provided with an opening 34A for emitting the sound created by the diaphragm 33.
  • the vibration unit 10 includes the magnetic circuit 11, the excitation coil 13, and the suspension 14 as described above, and the magnetic circuit 11 is supported via the suspension 14 by the vibration unit support 21 of the housing 20 to which the excitation coil is fixed.
  • the magnetic circuit 11 includes a magnet 11A, a yoke 11B and a plate 11C, and a magnetic gap 11C is formed between the yoke 11B and the plate 11C.
  • a weight part 12 is provided on the magnetic circuit 11, and the mass of the magnetic circuit 11 including the weight part 12 is substantially the same as the total mass of the housing 20 and the speaker unit 30.
  • the housing 20 includes a tubular leading sound part 22 for leading the sound emitted from the speaker unit 30 and an opening 23 formed at one end of the leading sound part 22.
  • the leading sound part 22 and the opening 23 are provided inside the ear tip 40. Further, the speaker unit 30 in the housing 20 is positioned closer to the leading sound part 22 than the vibration unit 10 in the housing 20.
  • the vibration part 41 of the ear tip 40 has an inner peripheral part 41A which is supported by the housing 20, and an edge part 43 is provided between the vibration part 41 and the holding part 42.
  • the aforementioned leading sound part 22 and the opening 23 are provided inside the inner peripheral part 41A of the ear tip 40.
  • the effective vibration area Va for the vibration of the ear tip 40 is acquired by the vibration part 41 and a part of the edge part 43. By making larger the effective vibration area Va, the sound pressure produced by the vibration of the ear tip 40 can be increased.
  • the ear tip 40 is annularly provided on the circumference of the housing 20, and the outer periphery of the vibration part 41 is connected to the inner periphery of the edge part 43, and the outer periphery of the edge part 43 is connected the inner periphery of the holding part 42.
  • Such a formation can be created by integrally molding the vibration part 41, the edge part 43, and the holding part 42.
  • the ear tip 40 itself is soft and has a desirable elasticity, while having a large compliance with respect to a force in the axial direction (X-axis direction). Also, it is preferable that the holding part 42 of the earphone 1 is arranged in close contact with the inner surface of the ear canal so that the space in the ear canal is hermetically or semi-hermetically sealed.
  • the form of the edge part 43 is important for the ear tip 40 to have such a characteristic.
  • the edge part 43 has a cross-sectional shape with a wave shape in the uniaxial direction (X-axis direction). Further, the thickness tb of the edge part 43 is formed thinner than the thickness ta of the vibration part 41.
  • the edge part 43 formed in such a manner has a relatively large compliance with respect to a force in the direction of the X axis, and allows the holding part 42 to keep in close contact with the inner surface of the ear canal by having a force to elastically expand the holding part 42 toward the outside thereof.
  • the maximum diameter of the holding part 42 of the ear tip 40 is larger than the maximum diameter of the housing 20. According to this formation, it is possible to allow the holding part 42 to keep in close contact with the inner surface of the ear canal by expanding the holding part 42 toward the outside thereof, and thus to hermetically seal the space in the ear canal.
  • Such a earphone 1 can be driven by a common signal which is input into the voice coil 31 of the speaker unit 30 as an audio signal while being input into the excitation coil 13 of the vibration unit 10 as an excitation signal.
  • the vibration part 41 of the ear tip 40 effectively reproduces low frequency sound, and thus even if the earphone is made small, it is possible to reproduce a sufficient low sound range in both vibration and sound pressure.
  • the ear tip 40 has a large compliance and thus makes it easy to cut low-to-mid range frequencies that may cause an unwanted dull sound so that a high-quality low frequency sound can be reproduced by the vibration of the vibration part 41 with no use of an electric filter.
  • the diaphragm 33 of the speaker unit 30 can reproduce a relatively high frequency sound, thereby expanding reproduction frequency band.
  • Fig. 3 is a view illustrating an example of a sound pressure frequency characteristic acquired by the earphone 1 according to an embodiment of the present invention.
  • This example shows a high sound pressure level in low frequencies no more than 100Hz.
  • the necessary frequency band and sound pressure can be adjusted by properly setting the mass of the magnetic circuit 11 including the weight part 12 of the vibration unit 10, the mass of the housing 20 including the speaker unit 30, the spring constant of the suspension 14, and the spring constant and compliance of the ear tip 40 for the earphone 1 according to an embodiment of the present invention.
  • the resonant frequency for the mass of the magnetic circuit 11 including the weight part 12 of the vibration unit 10 and the resonant frequency for the mass of the housing 20 including the speaker unit 30 produce a sound (vibration), and the peaks of these two resonant frequencies represent a frequency characteristic. Any frequency characteristic can be simply acquired by positioning both resonant frequencies for these two peaks closer to each other through adjustment of a spring constant and by adjusting resonance sharpness through the addition of a resistor.
  • the performance required for the ear tip 40 of the earphone 1 is, for example, to increase the effective vibration area Va in order to increase sound pressure caused by vibration; to employ a shape which allows for a broad design scope of compliance in order to set any frequency characteristic; and to improve the adhesion onto the wall surface of the ear canal in order to efficiently convert the vibration of the ear tip 40 to the pressure fluctuation in the volume of the ear canal.
  • the sound pressure sensitivity can be increased. It is preferable to increase the width of the edge part 34 in a direction intersecting with the X axis or the edge part 43 is arranged further outside from the center of the housing 20 in order to increase the effective vibration area Va.
  • the resonant frequency of vibration is shifted to a lower sound range, and thus a lower sound range can be reproduced.
  • the form of the edge part 43 needs to be devised so as to increase the compliance.
  • Figs. 4 and 5 are views illustrating examples of the form of an ear tip when driving only a vibration unit in an earphone according to an embodiment of the present invention. Not only the cross-sectional shape of wave shape for the edge part 43 of the ear tip 40 shown in the example of Fig. 2 , but also various types of cross-sectional shapes as shown in Figs. 4 and 5 allow for the increase of the compliance of the ear tip 40.
  • Figs. 4(a) to 4(c) and Figs. 5(a) and 5(b) show the cross-sectional shapes of the ear tip 40 in the vibration direction (X-axis direction) of the vibration unit 10.
  • the ear tips 40 (40A to 40E) shown in Figs. 4(a) to 4(c) and Figs. 5(a) and 5(b) are arranged around the vibration direction (X-axis direction shown in the drawing) of the vibration unit 10 in the same manner as the example described above, and include the vibration part 41 which vibrates in response to the vibration of the housing 20 and the holding part 42 which holds the housing 20 in the ear canal. Further, the ear tip 40 includes the edge part 43 between the vibration part 41 and the holding part 42.
  • the edge part 43 extends in a direction intersecting with the X axis and is arranged annularly around X-axis, and the cross-sectional shape of the edge part 43 in the direction intersecting with the vibration direction (in the direction of the X axis) is formed in a convex (or concave) shape in the direction of the X axis. Further, the example shown in Fig.
  • FIG. 4(a) illustrates that the holding part 42 provided outside the edge part 43 has an uprise part 42a which rises up from the outer end of the edge part 43 along the X axis and an umbrella-shaped part 42b which extends in the direction opposite the uprise part 42a from the end of the uprise part 42a.
  • the width of the edge part 43 it is possible to increase compliance while increasing the effective vibration diameter.
  • the uprise part 42a since the uprise part 42a is provided, it is possible to increase adhesion onto the inner surface of ear canal via the elastic force of the uprise part 42a and the umbrella-shaped part 42b.
  • the edge part 43 extends in the direction along the X axis and is provided annularly around X-axis, and the cross-sectional shape of the edge part 43 in the direction intersecting with the vibration direction (X-axis direction) is formed in a convex (or concave) shape in the direction intersecting with X-axis.
  • the position of the edge part 43 is arranged outwards, and thereby creating a relatively large effective vibration diameter.
  • the ear tip 40B includes the uprise part 42a extending along the X axis from the end of the edge part 43 and the umbrella-shaped part 42 extending in the direction opposite the uprise part 42a from the end of the uprise part 42a so that even if compliance is increased, the elastic force of the uprise part 42a and the umbrella-shaped part 42b can improve adhesion toward the inner surface of ear canal.
  • the edge part 43 extend in the direction along the X axis and is provided annularly around X-axis, and the cross-sectional shape of the edge part 43 in a direction intersecting with the vibration direction (in the direction of the X-axis) is formed in a concavo-convex shape in a direction intersecting with X-axis.
  • the edge part 43 has a rectangular concavo-convex shape. According to this example, the vibration of the housing 20 can be converted to sound pressure on the concavo-convex surface of the edge part 43 intersecting with the X axis so that the amplitude of the housing 20 can be effectively converted to sound pressure.
  • the edge part 43 is tubularly formed along the circumference in the direction of the X axis and is provided annularly around the X axis.
  • the inside of the tubular edge part 43 can be filled with air or other gas, liquid or solid.
  • a vibration part 41 for mounting the ear tip 40 (40D) onto the housing 20 extends in a direction intersecting with X-axis
  • the vibration part 41 for mounting the ear tip 40 (40E) onto the housing 20 extends along the X axis so that the edge part 43 is supported in the manner of a cantilever.
  • a suitable spring constant in addition to a large compliance can be acquired by the tubular edge part 43.
  • the shape of the edge part 43 allows for a large compliance in the direction of the X axis, and the compliance can be easily adjusted by adjusting the diameter of the tubular edge part 43.
  • the ear tip 40 is configured to easily support the housing 20 horizontally along an ear canal even if the edge part has a relatively large compliance.
  • the ear tip 40 (40D, 40E) as shown in Fig. 5 is also provided with the holding part 42 extending outside the edge part 42 like an umbrella. Even when the edge part 43 has a large compliance, it is possible to improve adhesion onto the inner surface of the ear canal by forming the holding part 42 into a shape which extends to the outside thereof. Thereby, it is possible to effectively create the space Ys in the ear canal in a hermetically or semi-hermetically sealed state.
  • the ear tip 40 is vibrated by vibrating the vibrating unit 10 via the housing 20 in the direction of the X axis with reference to the inner surface of the ear canal Y (human body), and thereby effectively driving the air volume of the space Ys in the ear canal, which is hermitically or semi-hermetically sealed. Accordingly, the ear tip 40 having a large compliance with respect to the force in the direction of the X axis functions as a diaphragm, and thereby reproducing a high-quality low frequency range with little dull sound. Further, the vibration of the ear tip 40 creates a pressure fluctuation in the space Ys in the ear canal, and the pressure fluctuation allows for the reproduction of low sound range. As such, the earphone 1 according to the embodiment of the present invention allows for the sound reproduction creating the feeling of being at a live performance even if the earphone is small.
  • the resonant frequency of vibration is shifted to a lower sound range by increasing the compliance of the ear tip 40 in the direction of the X axis. Therefore, since the frequency of the sound pressure excited by the vibration of the vibration unit 10 is in a lower sound range, unprecedented reproduction of low frequency range can be achieved. Further, the sound pressure sensitivity due to vibration can be increased by increasing the effective vibration diameter of the ear tip 1.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Headphones And Earphones (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Claims (15)

  1. Kopfhörer (1) aufweisend:
    ein Vibrationsmittel (10), welches in einer einachsigen Richtung (X) vibriert;
    ein Gehäuse (20), welches das Vibrationsmittel (10) lagert und in Antwort auf die Vibration des Vibrationsmittels (10) vibriert; und
    eine Ohrspitze (40), welche an dem Gehäuse (20) befestigt ist, wobei die Ohrspitze (40) um die einachsige Richtung (X) herum angeordnet ist und einen Vibrationsteil (41) und einen Halteteil (42) umfasst, wobei der vibrierende Teil (41) in Antwort auf die Vibration des Gehäuses (10) in der einachsigen Richtung (X) vibriert, und
    der Halteteil (42) das Gehäuse (20) in einem Gehörgang hält und die innere Oberfläche (Y) des Gehörgangs berührt.
  2. Kopfhörer gemäß Anspruch 1, wobei ein Randteil (43) zwischen dem Vibrationsteil (41) und dem Halteteil (42) bereitgestellt wird.
  3. Kopfhörer gemäß Anspruch 2, wobei die Querschnittsform des Randteils (43) in der einachsigen Richtung (X) eine Wellenform aufweist.
  4. Kopfhörer gemäß Anspruch 3, wobei die Stärke des Randteils (43) dünner gebildet ist, als die Stärke des Vibrationsteils (41).
  5. Kopfhörer gemäß Anspruch 2, wobei der Randteil (43) röhrenförmig entlang des Umfangs der einachsigen Richtung (X) gebildet ist.
  6. Kopfhörer gemäß Anspruch 2, wobei die Ohrspitze (40) ringförmig um das Gehäuse (20) bereitgestellt wird, wobei
    der äußere Umfang des Vibrationsteils (41) mit dem inneren Umfang des Randteils (43) verbunden ist, und der äußere Umfang des Randteils (43) mit dem inneren Umfang des Halteteils (42) verbunden ist.
  7. Kopfhörer gemäß Anspruch 6, wobei der Vibrationsteil (41), der Randteil (43) und der Halteteil (42) integral geformt sind.
  8. Kopfhörer gemäß Anspruch 1, wobei der maximale Durchmesser des Halteteils (42) größer ist als der maximale Durchmesser des Gehäuses (20).
  9. Kopfhörer gemäß Anspruch 1, wobei das Gehäuse (20) eine Lautsprechereinheit (30) aufnimmt, welche einen Klang in Antwort auf ein Audiosignal emitiert, und eine Vibrationseinheit (10) als ein Vibrationsmittel (10), welches in Antwort auf ein Erregungssignal vibriert.
  10. Kopfhörer gemäß Anspruch 9, wobei das Gehäuse (20) einen röhrenförmigen, führenden Klangteil (22) umfasst, zum Führen des Klangs, der von der Lautsprechereinheit (30) emittiert wurde, und eine Öffnung (23), die an einem Ende des führenden Klangteils (22) gebildet ist.
  11. Kopfhörer gemäß Anspruch 10, wobei der führende Klangteil (22) und die Öffnung (23) innerhalb des Vibrationsteils (41) bereitgestellt werden.
  12. Kopfhörer gemäß Anspruch 10, wobei die Lautsprechereinheit (30) in dem Gehäuse (20) näher an dem führenden Klangteil (22) angeordnet ist als die Vibrationseinheit (10) in dem Gehäuse (20).
  13. Kopfhörer gemäß Anspruch 9, wobei die Vibrationseinheit (10) einen Magnetkreis (11) umfasst, der einen Magnetspalt (11C) umfasst, eine Erregungsspule (13), die in dem Magnetspalt (11C) angeordnet ist, und eine Lagerung (14) zum Lagern des Magnetkreises (11) an dem Gehäuse (20), wobei
    die Erregungsspule (13) an dem Gehäuse (20) befestigt ist.
  14. Kopfhörer gemäß Anspruch 9, wobei der Magnetkreis (11) mit einem Gewichtsteil (12) bereitgestellt wird.
  15. Kopfhörer gemäß Anspruch 14, wobei die Masse des Magnetkreises (11) mit dem Gewicht (12) Teil im wesentlich gleich ist wie die Gesamtmasse des Gehäuses (20) und der Lautsprechereinheit (30).
EP11863718.0A 2011-04-20 2011-04-20 Kopfhörer Not-in-force EP2701399B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/059761 WO2012144040A1 (ja) 2011-04-20 2011-04-20 イヤホン

Publications (3)

Publication Number Publication Date
EP2701399A1 EP2701399A1 (de) 2014-02-26
EP2701399A4 EP2701399A4 (de) 2014-12-17
EP2701399B1 true EP2701399B1 (de) 2017-08-09

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EP11863718.0A Not-in-force EP2701399B1 (de) 2011-04-20 2011-04-20 Kopfhörer

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JP (1) JPWO2012144040A1 (de)
WO (1) WO2012144040A1 (de)

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JP2016178627A (ja) * 2015-03-19 2016-10-06 パナソニックＩｐマネジメント株式会社 体感振動ヘッドホン
JP6898008B2 (ja) 2017-05-23 2021-07-07 Ｎｅｃプラットフォームズ株式会社 イヤパッド及びこれを用いたイヤホン
CN113366860B (zh) * 2019-01-29 2024-10-18 铁三角有限公司 听筒及耳机

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EP2701399A1 (de) 2014-02-26
JPWO2012144040A1 (ja) 2014-07-28
EP2701399A4 (de) 2014-12-17
WO2012144040A1 (ja) 2012-10-26

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