JP5902202B2 - headphone - Google Patents

Description

  The present invention relates to headphones.

  The headphones include a speaker unit, a housing surrounding the back side of the speaker unit, and an ear contact portion provided on the front side of the speaker unit. The headphones here include not only those in which a pair of left and right housings are connected by a headband, but also earphone types that directly support the housing on the user's ears, and so-called headsets in which the housing includes a microphone device. It is out.

  Such headphones are known in which a space in the housing is communicated with the outside by opening a hole in the housing. Patent Document 1 listed below discloses an acoustic transducer for the purpose of improving the response in the low frequency range by changing the acoustic equivalent circuit on the back side of the acoustic transducer without changing the structure of the acoustic transducer (speaker unit). The housing (housing) to which is attached is provided with a duct portion for emitting sound emitted from the rear surface of the acoustic transducer to the outside.

Japanese Unexamined Patent Publication No. 7-170591

  In headphones, when a hole or the like is opened in the housing surrounding the back side of the speaker unit so that the space inside the housing communicates with the outside, external noise can easily enter the space inside the housing, such as a diaphragm or acoustic filter. Noise that has passed through the constituent members of the speaker unit having air permeability and entered the housing reaches the listener's ear. In this case, since the listener listens to external noise together with the sound emitted from the speaker unit, there arises a problem that the reproduced sound of the speaker unit cannot be heard clearly.

  This invention makes it an example of a subject to cope with such a problem. That is, when the space in the housing surrounding the back side of the speaker unit is communicated with the outside, it is an object of the present invention to make it difficult for listeners to hear external noise.

In order to achieve such an object, the headphones according to the present invention have at least the following configuration.
A speaker unit; a housing that houses the speaker unit; and an annular ear contact portion that is attached to the housing on an acoustic emission side of the speaker unit. The housing includes an internal space and the internal space. And an inner space of the ear contact portion communicates with the listener's ear, and communicates with the outside through the air chamber and the inner space. formed by the outer peripheral wall and inner peripheral wall portions facing each other of the housing, that the the outer peripheral wall portion is formed a first hole portion communicating with the outside, is in said peripheral wall through with the interior space of the housing Headphones second hole portion is formed, characterized in that at different positions along the outer periphery of the first of said housing so as not to face each other with the hole portion and the second hole portion.

1 is an external view of a headphone according to an embodiment of the present invention. It is explanatory drawing which showed the specific structure of the headphones which concern on one Embodiment of this invention. It is explanatory drawing which showed the specific structure of the headphones which concern on one Embodiment of this invention. It is explanatory drawing which showed the specific structure of the headphones which concern on one Embodiment of this invention. It is explanatory drawing which showed the specific structure of the headphones which concern on one Embodiment of this invention. It is explanatory drawing which showed the other example of the headphones which concern on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiment of the present invention includes the contents shown in the drawings, but is not limited thereto. FIG. 1 is an external view of a headphone according to an embodiment of the present invention. The illustrated headphone 1 includes left and right headphone units 1A and 1B, and hangers (headbands) 1C for connecting the headphone units 1A and 1B. The headphone units 1 </ b> A and 1 </ b> B are each provided with a housing 2 that houses a speaker unit and an ear contact portion 3. Both ends 1C1 and 1C2 of the hanger 1C are connected to the connecting portion 1D1 of the arm 1D, and the arms 1D and 1D are connected to the housings 2 and 2, respectively.

  The illustrated headphone 1 is provided with a plurality of holes 2 a in the side portion of the housing 2, and the inner space of the housing 2 communicates with the outside of the housing 2 outside the ear contact portion 3 through the holes 2 a. The headphone 1 can adjust the compliance by the internal space of the housing 2 by the hole 2a, and can adjust the frequency characteristic, particularly the frequency characteristic in the low frequency range, by adjusting the compliance.

  2-5 is explanatory drawing which showed the specific structure of the headphones based on one Embodiment of this invention. FIG. 2 is a cross-sectional view showing the internal structure of one headphone unit. As described above, the headphone 1 (headphone unit 1A (1B)) includes the speaker unit 10, the housing 2 surrounding at least the back side of the speaker unit 10, and the ear contact portion 3 provided on the front side of the speaker unit 10. ing.

  The speaker unit 10 includes a diaphragm 11, a voice coil 12 connected to the diaphragm 11, a magnetic circuit 13 having a magnetic gap in which the voice coil 12 is disposed, and an outer periphery of the diaphragm 11 via an edge 14. A supporting frame 15 is provided. The magnetic circuit 13 is supported by the frame 15 or by a connecting portion 20 described later. The magnetic circuit 13 includes a plate 13A, a magnet 13B, and a yoke 13C, and the above-described magnetic gap is formed between the plate 13A and the yoke 13C. The configuration of the speaker unit 10 is not limited to this, and various known modes such as forming a magnetic gap between the magnet and the yoke can be employed.

  The housing 2 includes a connecting portion 20 to which the speaker unit 10 is connected and a housing portion 21 that surrounds the back side of the speaker unit 10. The housing part 21 includes an outer peripheral cylinder part 21B and a surface part 21C. The connecting portion 20 includes a support portion 20 </ b> A that supports the speaker unit 10. The support portion 20A protrudes to the inside of the housing 2 and supports the frame 15 of the speaker unit 10. The arm portion 1D is rotatably attached to the outer peripheral cylindrical portion 21B of the housing portion 21. A part of the surface portion 21C of the housing portion 21 is covered with a cover member 21A.

  The ear contact portion 3 includes an annular elastic member 3A and a covering member 3B that covers the elastic member 3A. The ear contact portion 3 is attached to the housing 2 on the acoustic emission side of the speaker unit 10. The ear contact portion 3 is in contact with the listener's ear, thereby dividing the outside of the housing 2 into a space inside the ear contact portion 3 (external space S1) and an outside S2 outside the ear contact portion 3. The outer space S1 of the housing 2 inside the ear contact portion 3 is a space communicating with the listener's ear. The outside S2 of the housing 2 outside the ear contact portion 3 is separated from the space in the ear by the ear contact portion 3.

  In the headphone unit 1 </ b> A (1 </ b> B), the internal space 2 </ b> S of the housing 2 communicates with the external space S <b> 1 of the housing 2 inside the ear contact portion 3. Specifically, the internal space 2 </ b> S of the housing 2 communicates with the external space S <b> 1 of the housing 2 inside the ear contact portion 3 through the opening 20 </ b> C provided in the connecting portion 20 of the housing 2. Further, when the speaker unit 10 includes a structural member such as the diaphragm 11 having air permeability, the internal space 2S of the housing 2 is located inside the ear contact portion 3 through the structural member having air permeability. It communicates with the external space S1. The opening 20C may be covered with a breathable member such as a nonwoven fabric.

  The housing 2 is provided with an air chamber 30 separately from the internal space 2S of the housing 2. The air chamber 30 may be provided inside the housing 2 or outside the housing. For example, the outer peripheral side surface of the housing 2 on the outer side of the housing 2, the inner peripheral side surface of the housing 2 on the inner space side of the housing 2, or the case where an air chamber is provided inside the member constituting the housing 2, etc. . The internal space 2 </ b> S of the housing 2 communicates with the external S <b> 2 of the housing 2 outside the ear contact portion 3 via the air chamber 30. The air chamber 30 in this embodiment is formed by the constituent members of the housing 2. That is, the air chamber 30 is constituted by a part of the housing 2. Note that the air chamber 30 may be formed of a constituent member that forms a headphone, or may be a part of the headphone. The internal space 2S of the housing 2 includes the air chamber 30 described above as a first air chamber and the internal space 2S of the housing 2 as a second air chamber.

  FIG. 3 is an enlarged cross-sectional view showing the configuration of the air chamber in the housing. In the housing 2, a part of the wall portion has a double structure in the wall portion (side portion), and includes an outer wall portion 31 and an inner wall portion 32. The air chamber (first air chamber) 30 is disposed between the outer wall portion 31 facing the outside S2 of the housing 2 outside the ear contact portion 3 and the inner wall portion 32 facing the inner space 2S of the housing 2. ing. The outer wall portion 31 includes a first hole portion 34. The inner wall portion 32 includes a second hole portion 35. The first hole portion 34 is the hole portion 2a described above, and is provided on the outer peripheral side surface 2b (the outer peripheral cylindrical portion 21B) of the housing 2 in the illustrated example. The housing 2 also includes a transverse wall portion 33 that intersects between the outer wall portion 31 and the inner wall portion 32. The transverse wall portion 33 extends in a direction intersecting the outer wall portion 31 and the inner wall portion 32. The air chamber 30 is surrounded by an outer wall portion 31, an inner wall portion 32, and a transverse wall portion 33.

  In the illustrated example, the housing 2 is configured by connecting the constituent members of the connecting portion 20 and the constituent members of the housing portion 21. The air chamber (first air chamber) 30 is provided in the vicinity of the connection position between the connecting portion 20 and the housing portion 21. Specifically, it is provided at the connection position of the connecting portion 20 and the housing portion 21 in the radial direction of the housing 2. In addition, the air chamber 30 may be configured by a part of the connecting part 20 and a part of the casing part 21, or may be configured by the entire connecting part 20 and the entire casing part 21.

  FIG. 4 is an explanatory view showing a state in which each part of the housing and the ear contact part are separated. Here, the example of a structure of the connection part 20 of the state which removed the speaker unit 10 is shown. The connecting portion 20 includes a support portion 20 </ b> A that supports the speaker unit 10 on the housing 2, and a protective portion 20 </ b> B that faces the acoustic radiation surface of the speaker unit 10. Each of the support portion 20A and the protection portion 20B has an opening 20C. The opening 20C allows the internal space 2S and the external space S1 of the housing 2 to communicate with each other.

  In the illustrated example, a part of the air chamber 30 is formed in the connecting portion 20. As for the connection part 20, the inner wall part 32 is provided in the internal space 2S side. A part of the second hole portion 35 is formed in a concave shape in the inner wall portion 32 on the housing 2 side. A part of the air chamber 30 is formed along the outer peripheral portion of the connecting portion 20. In the illustrated example, a part of the air chamber 30 is formed in two places in the connecting portion 20.

  The support portion 20 </ b> A of the connecting portion 20 is provided between the outer peripheral portion 10 a (see FIG. 2) of the speaker unit 10 and the inner wall portion 32 while supporting the speaker unit 10. Further, the support portion 20 </ b> A of the connecting portion 20 is disposed on the side facing the ear contact portion 3. A gap 20D (see FIG. 3) is provided between the ear contact portion 3 and the support portion 20A. The internal space 2S (second air chamber) of the housing 2 communicates with the external space S1 of the housing 2 inside the ear contact portion 3 via the gap 20D and the opening 20C of the support portion 20A. By providing such a gap 20 </ b> D, even if the support portion 20 </ b> A of the connecting portion 20 is covered with the ear contact portion 3, the second air chamber (internal space 2 </ b> S) and the housing 2 inside the ear contact portion 3 can be provided. The external space S1 can be communicated with and the acoustic characteristics in the low sound range can be improved.

  On the other hand, the air chamber 30 (first air chamber) is located outside the housing 2 with respect to the opening 20C of the support portion 20A in the direction (radial direction R) from the internal space 2S of the housing 2 to the outside S2 of the housing 2. On the side. By providing the air chamber 30 on the outside of the housing 2 with respect to the speaker unit 10, the space on the housing 2 side can be saved, and the speaker unit 10 can be made as large as possible.

  When the air chamber 30 is the first air chamber, the headphone 1 is provided with a second air chamber (internal space 2S) between the inner wall portion 32 and the speaker unit 10. The second air chamber (internal space 2S) communicates with the outside S1 of the housing 2 outside the ear contact portion 3 via the first air chamber (air chamber 30). The second air chamber (internal space 2S) communicates with the external space S1 of the housing 2 inside the ear contact portion 3 through the opening 20C of the connecting portion 20 or the breathable component of the speaker unit 10. doing.

  FIG. 5 is an explanatory view showing the arrangement of the air chamber 30 and the first and second holes, which is a cross-sectional shape of the housing 2. In the illustrated embodiment, the air chamber 30 extends along the outer peripheral portion of the housing 2. The position of the first hole 34 communicating from the air chamber 30 to the outside S2 of the housing 2 outside the ear contact portion 3 and the air chamber 30 communicates with the interior space 2S (second air chamber) of the housing 2. The positions of the first hole 34 and the second hole 35 are different along the outer peripheral portion of the housing 2 so that the position of the second hole 35 does not oppose. According to this, the noise that enters the housing 2 from the outside S2 of the housing 2 outside the ear contact portion 3 is reflected on the wall portion of the air chamber 30, and the propagation path of the noise as a sound wave is refracted. That is, noise can be prevented from entering the internal space 2S (second air chamber) of the housing 2 due to reflection in the air chamber 30 or the like.

  In the headphone 1 having such an example, the internal space 2S of the housing 2 communicates with the external S2 of the housing 2 outside the ear contact portion 3, so that the space on the housing 2 side with respect to the speaker unit 10 is large. Can be substantially enlarged, and the low-frequency characteristics of the speaker unit 10 can be improved. At this time, noise enters the internal space of the housing 2 from the outside S2 of the housing 2 outside the ear contact portion 3, but the outside S2 of the housing 2 and the housing outside the ear contact portion 3 on the noise propagation path. By providing the first air chamber (air chamber 30) between the two inner spaces, noise that propagates to the outer space S1 of the housing 2 inside the ear contact portion 3 can be reduced. Thereby, the sound insulation of the headphones 1 can be improved.

  Here, the form of communication between the air chamber 30 and the outside S2 of the housing 2 or the internal space 2S of the housing 2 is limited to the form by providing the first hole 34 and the second hole 35 described above. It may be a communication form using a member having air permeability or a slit. The positions of the first hole portion 34, the second hole portion 35, and the air chamber 30 having these hole portions are not limited to the outer peripheral cylindrical portion of the housing 2 (housing portion), but also the housing 2 (housing portion). It can be provided on the surface portion.

  FIG. 6 is an explanatory diagram showing another example of the headphones according to the embodiment of the present invention. This headphone 100 is of an earphone type in which the above-described ear contact portion 3 is constituted by an ear insert 101. This headphone 100 is provided with a speaker unit 10 in a housing 2. A wiring 102 for inputting an audio signal to the speaker unit is connected to the speaker unit 10 and is drawn out from the inside of the housing 2 to the outside. A damper 103 is provided in the internal space 2S in the housing 2. In the housing 2, an air chamber 30 is provided, and a first hole 34 and a second hole 35 are provided. In such a headphone 100 as well, the low frequency range characteristics of the speaker unit 10 can be improved and the headphone 100 having a relatively high sound insulation can be obtained as in the above-described embodiment.

  Such headphones 1 and 100 can be connected to or mounted on various electronic devices that output sound. An electronic device (for example, a mobile phone or the like) to which such headphones 1 and 100 are connected or mounted has little noise and can listen to sound with good acoustic characteristics.

  As mentioned above, although embodiment of this invention has been explained in full detail with reference to drawings, a concrete structure is not restricted to these embodiment. Combinations of technical matters described in the embodiments and design changes within a range not departing from the gist of the present invention are also included in the present invention.

Claims (2)

A speaker unit, a housing that houses the speaker unit, and an annular ear contact portion that is attached to the housing on the acoustic emission side of the speaker unit;
The housing is provided with an internal space and an air chamber different from the internal space, and the space inside the ear contact portion communicates with the listener's ear, and the air chamber and the internal space are communicated with each other. Communicate with the outside through
The air chamber is formed by an outer peripheral wall portion and an inner peripheral wall portion facing each other of the housing, a first hole portion communicating with the outside is formed in the outer peripheral wall portion, and the inner peripheral wall portion is formed by the inner peripheral wall portion. characterized in that the second hole portion that passes with the interior space formed, at different positions along the outer periphery of the first of said housing so as not to face each other with the hole portion and the second hole portion And headphones. The headphone according to claim 1 , wherein the internal space communicates with the outside through a member having air permeability of the air chamber .

Images