JP2008125008A - Ear set - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ear set including a microphone and a receiver, the ear set being capable of efficiently performing selective collection of voices of a wearer even when being made compact. <P>SOLUTION: The ear set 10 is configured in such a way that a first casing 22 which houses the microphone 32 of the ear set is disposed approximately along a face 6 of the wearer. A non-oriented microphone is used as the microphone 32 and in a portion near a back wall 22a in a lower end of the first casing 22, a sound collection opening 22c which is opened downward is formed. Thus, in voices uttered from the wearer, voices sneaked from the mouth of the wearer to the rear side are collected by the microphone 32 via the sound collection opening 22c. The sound collection opening 22c is opened approximately in parallel with the face 6 in the vicinity of the face 6, so that voices transmitted along the face 6 as surface waves are efficiently collected and even outdoors, the sound collection is not almost affected by wind noise. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an earset having a microphone and a receiver.

  The earset is an ear-hook type or pinna-type portable information device, and has a configuration suitable for an information terminal using wireless communication technology such as so-called Bluetooth.

  This earset includes a microphone and a receiver. However, in “Patent Document 1”, an ear including a casing unit that accommodates the microphone and the receiver and an ear hook attached to the casing unit. A hanging earset is described.

  Further, in “Patent Document 2”, a first housing portion that houses a microphone, and a shaft that protrudes in a direction orthogonal to the predetermined direction at a position away from the microphone housing position in the first housing portion in a predetermined direction. There is described an auricle insertion type earset including a ring-shaped connecting portion and a second housing portion fixed in a state in which a receiver is accommodated at a distal end portion of the shaft-shaped connecting portion.

Utility Model Registration No. 3078858 JP-A-9-65475

  In such an earset, a speech microphone such as a wearer's voice is collected, while a noise such as the voice of another person and ambient environmental sounds are not collected. And directional microphones are often used.

  These close-talking microphones or directional microphones are configured to collect sound through sound collecting openings formed at two locations on both sides of the vibration membrane. In the close-talking microphone, the sound from the sound source near the microphone (that is, the voice of the wearer) has a large phase difference between the two sound collection openings, whereas the sound from the sound source far away from the microphone. (Ie, noise) is configured to selectively collect only the sound from the sound source near the microphone by utilizing the fact that the phase difference is almost eliminated, while the directional microphone is used for the wearer. By arranging it toward the mouth, only the voice of the wearer is selectively collected.

  In recent years, there is a tendency to reduce the size of earsets due to demands for fashionability at the time of wearing. However, when the earset size is reduced, the microphone is positioned around the back of the cheek near the pinna on the face. It will be quite far from the mouth.

  For this reason, when a close-talking microphone is used, there is a problem that a phase difference also occurs in the voice of the wearer, and that selective sound collection is difficult to be performed. On the other hand, when a directional microphone is used, there is a problem that it cannot be placed toward the wearer's mouth and the selective sound collection is difficult to be performed.

  When these close-talking microphones or directional microphones are used, one of the two sound collection openings is connected to the outer wall of the housing portion that accommodates the microphone (that is, the rear wall on the face side). It is necessary to form on the opposite front wall. However, when the sound collecting opening is formed on the outer wall in this way, in the outdoors where the wind is strong, the wind forms a Karman vortex in the vicinity of the outer wall of the microphone and generates wind noise. This wind noise is collected as noise by the microphone through the sound collection opening formed on the outer wall, and it becomes impossible to selectively collect the wearer's voice. .

  And, in order to take measures against this wind noise, it is necessary to cover the sound collection opening with a buffer member such as a considerably large sponge, so it becomes impossible to reduce the size of the earset, There is a problem that its fashionability is also lost.

  The present invention has been made in view of such circumstances, and in the earset having a microphone and a receiver, even when the earset is downsized, the selective sound collection of the wearer's voice can be efficiently performed. The purpose is to provide an earset that can be used.

  In the present invention, an omnidirectional microphone is used as a microphone and the arrangement of the sound collection opening is devised to achieve the above object.

That is, the earset according to the present invention is
An earset having a microphone and a receiver,
A first housing portion for housing the microphone, a shaft-like connecting portion projecting in a direction orthogonal to the predetermined direction at a position away from the microphone housing position in the first housing portion in a predetermined direction, and the shaft In the earset comprising the second housing part fixed in a state in which the receiver is accommodated at the tip of the connection part,
An omnidirectional microphone is used as the microphone.
A sound collection opening in a portion near the back wall located on the second housing portion side at an end portion of the first housing portion in a direction opposite to the predetermined direction, in a direction opposite to the predetermined direction. The opening for use is formed, It is characterized by the above-mentioned.

  The “first housing portion” is configured to receive a microphone, and the shaft-like connecting portion may protrude in a direction orthogonal to the predetermined direction at a position away from the microphone storing position in the predetermined direction. If it has a size, the specific shape, size, etc. will not be specifically limited.

  The term “predetermined direction” is a term used to clarify the positional relationship between the microphone housing position and the shaft-like connecting portion in the first housing portion and the protruding direction of the shaft-like connecting portion. “Predetermined direction” does not mean a specific direction.

  The specific configuration of the “microphone” is not particularly limited as long as it is an omnidirectional microphone, but a high-sensitivity microphone is preferably used.

  The “sound collecting opening” is formed in the vicinity of the back wall at the end of the first housing portion in the direction opposite to the predetermined direction so as to open in the direction opposite to the predetermined direction. If it is a thing, the concrete opening shape will not be specifically limited.

  As shown in the above configuration, the earset according to the present invention includes a first housing portion that accommodates a microphone, and is orthogonal to the predetermined direction at a position away from the microphone housing position in the first housing portion in a predetermined direction. The shaft-shaped connecting portion that protrudes in the direction to be connected and the second housing portion that is fixed in a state in which the receiver is accommodated at the tip of the shaft-shaped connecting portion. A directional microphone is used, and for collecting sound that opens toward a direction opposite to the predetermined direction at a portion near the back wall of an end portion of the first casing opposite to the predetermined direction. Since the opening is formed, the following operational effects can be obtained.

  That is, when the second housing portion that houses the receiver is inserted into the auricle and pressed against the entrance portion of the ear canal, the first housing portion that houses the microphone is arranged to extend substantially along the face. The Rukoto. And since the opening part for sound collection which opens toward the direction opposite to the said predetermined direction is formed in the back wall vicinity site | part of the edge part opposite to the said predetermined direction in this 1st housing | casing part. Of the voices uttered by the wearer, the voices that circulate from the mouth to the rear side are collected by the microphone through the sound collection opening. At that time, the sound collection opening is in a state of being opened substantially parallel to the face in the vicinity of the face, and therefore, the sound transmitted from the wearer as a surface wave along the face is efficiently transmitted. The sound will be collected.

  In addition, in the earset according to the present invention, since an omnidirectional microphone is used as the microphone, it is sufficient to form only one sound collection opening. Since the sound collection opening is formed in the vicinity of the back wall of the first housing part, it should not be exposed on the surface opposite to the protruding direction of the shaft-like connecting part. it can. For this reason, there is almost no influence of wind noise even in the outdoors and the like, whereby selective sound collection of the wearer's voice can be performed efficiently.

  Therefore, according to the present invention, even when an earset having a microphone and a receiver is miniaturized, selective sound collection of the wearer's voice can be performed efficiently.

  In the above configuration, if the opening for collecting sound is formed in a slit shape along a plane perpendicular to the protruding direction of the shaft-like connecting portion, the surface is emitted along the face from the wearer. The sound collection efficiency of the sound transmitted as waves can be increased.

  In the above configuration, the back wall of the first housing portion is formed so as to extend in a substantially planar shape along a plane orthogonal to the protruding direction of the shaft-like coupling portion, and at the microphone housing position in the first housing portion. By forming a bulging portion that bulges from the back wall in the same direction as the protruding direction of the shaft-like connecting portion, and forming a sound collection opening in this bulging portion, the following An effect can be obtained.

  That is, contact between the first housing part and the face is performed in a state close to point contact at the bulge part, so that the skin friction sound generated by rubbing between the first housing part and the face is collected by the microphone. The possibility of making noise can be reduced.

  In the above configuration, if the sound collection opening is formed so as to be substantially flush with the general portion of the back wall, the sound collection opening is not blocked by the face. It is possible to enhance the sound collecting effect on the sound transmitted as a surface wave along the face.

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

  FIG. 1 is a front view showing an earset 10 according to an embodiment of the present invention. 2 is a view in the direction of arrow II in FIG. 1, and FIG. 3 is a view in the direction of arrow III in FIG. FIG. 4 is a perspective view showing the earset 10.

  As shown in these drawings, the earset 10 according to the present embodiment includes an earset body 12 having a microphone 32 and a receiver 34 and an earhook 14 attached to the earset body 12.

  FIG. 5 is a diagram showing the earset 10 according to the present embodiment in a state where the earset 10 is worn on the right ear 2 of the user. 6 is a detailed sectional view taken along the line VI-VI in FIG. FIG. 7 is a perspective view showing the earset body 12 as a single item.

  In the following description, it is assumed that the earset 10 is arranged in the posture shown in FIG.

  The earset main body 12 of the earset 10 includes a first housing portion 22 that extends in the vertical direction, and an axial connection that protrudes toward the back side of the first housing portion 22 at the upper end portion of the first housing portion 22. The configuration includes a portion 24 and a second housing portion 26 fixed to the distal end portion of the shaft-like connecting portion 24.

  The first housing portion 22 is made of synthetic resin and includes a front side half 22A, a back side half 22B, and a dome-shaped cap 22C. At this time, the front side half 22A and the back side half 22B are assembled together to constitute a lever extending in the vertical direction in a substantially rectangular cross section. The dome-shaped cap 22C is formed so as to protrude substantially hemispherically toward the front side, and is detachably attached to the upper portion of the front side half 22A.

  The upper portion of the first housing portion 22 is formed in a circular shape when viewed from the front, the intermediate portion thereof is formed with a constant left-right width, and the left-right width gradually narrows toward the lower portion. It is formed as a tapered part. At this time, the first casing portion 22 has a total length of about 46 mm, and the left and right widths and depth widths thereof are set to values of about 15 mm and about 8 mm, respectively, at the intermediate portion.

  A back wall 22a (that is, a wall located on the side of the shaft-like connecting portion 24) 22a of the back-side half 22B in the first housing portion 22 is planar along a vertical plane orthogonal to the protruding direction of the shaft-like connecting portion 24. Is formed. The first housing portion 22 accommodates a printed wiring board 38 so as to extend in parallel with the back wall 22a from the upper part to the lower part.

  A battery 36 is accommodated in the upper portion of the first housing portion 22 so as to be electrically connected to the printed wiring board 38. The battery 36 can be replaced by attaching and detaching the dome-shaped cap 22C.

  A rectangular opening is formed in the side wall in the middle portion of the first housing portion 22, and the power switch 40 is electrically connected to the printed wiring board 38 in the rectangular opening. Are arranged.

  The microphone 32 is accommodated in the vicinity of the lower end of the tapered portion of the first housing portion 22 so as to be electrically connected to the printed wiring board 38. The microphone 32 is a high-sensitivity (for example, about −42 dB) omnidirectional microphone, and is accommodated in an annular flange portion 22 d formed on the inner surface of the back wall 22 a of the back-side half 22 B in the first housing portion 22. ing. The annular flange portion 22d is formed so as to protrude toward the front side with a slightly larger diameter than the microphone 32.

  The back wall 22a of the back half 22B bulges toward the back side (that is, in the same direction as the protruding direction of the shaft-like connecting portion 24) at the back side of the accommodation position of the microphone 32. It is formed as a bulging portion 22b. At this time, the bulging portion 22b has a surface shape in which a spherical surface is slightly squared in an X shape, and is about 1 mm toward the back side from the general portion of the back wall 22a formed in a flat shape. It is formed to protrude. And this bulging part 22b is extended in the substantially spherical shape to the lower end edge of the back side half 22B.

  A sound collection opening 22c that opens downward is formed at a lower portion of the back half 22B in the vicinity of the back wall 22a. Specifically, as shown in FIG. 6, the sound collection opening 22c is formed in a slit shape in the lower half of the bulging portion 22b so as to be substantially flush with the general portion of the back wall 22a. Has been. At this time, the slit thickness (that is, the width in the front-rear direction) of the sound collection opening 22c is set to a value of about 0.5 mm, and the slit width (that is, the width in the left-right direction) is set to a value of about 3 mm. The sound collection opening 22c is formed so as to extend upward to the vicinity of the upper end of the annular flange 22d along the inner surface of the rear half 22B.

  By forming the sound collection opening 22c in this way, the back wall 22a of the back half 22B has a configuration in which the sound hole of the microphone 32 cannot be directly viewed from the back side of the first housing portion 22. . Thus, the microphone 32 is protected so that light from the outside does not hit the internal FET or the like through the sound hole of the microphone 32, and the microphone 32 is also protected from dust and the like. In the present embodiment, the sound hole of the microphone 32 is protected by the bulging portion 22b in the back wall 22a.

  The shaft-like connecting portion 24 is configured as a boss having an outer diameter of about 4 mm and an inner diameter of about 2 mm, and is formed integrally with the back side half 22 </ b> B of the first housing portion 22. And this axial connection part 24 is comprised so that when the 2nd housing | casing part 26 is attached to the front-end | tip part, the axial length between the 1st and 2nd housing | casing parts 22 and 26 will be about 4 mm. Has been.

  The second housing portion 26 is made of synthetic resin, and includes a front half 26A and a back half 26B, and has a circular shape when viewed from the front. At this time, the outer diameter of the second casing portion 26 is set to a value of about 16 mm, which is slightly smaller than the outer diameter of the dome-shaped cap 22C. The receiver 34 is accommodated in the second casing 26 so as to be electrically connected to the printed wiring board 38. The electrical connection between the receiver 34 and the printed wiring board 38 is performed by passing the wiring through the cylindrical space of the shaft-like connecting portion 24.

  The front half 26A is formed so as to protrude in a substantially conical shape toward the front side, and is formed integrally with the shaft-like connecting portion 24 in a state of being connected to the shaft-like connecting portion 24 at the center thereof. ing. A pressure adjusting hole 26a is formed in the upper part of the front half 26A. On the other hand, the back half 26B has a central portion formed in a flat shape and a peripheral portion formed in an annular curved surface, and a sound emitting hole 26b is formed at a position slightly below the central portion. Is formed.

  The ear hook 14 is made of a synthetic resin, and is formed so that the tip vicinity portion 14a extends in a substantially C shape in a front view (that is, in a plane orthogonal to the protruding direction of the shaft-like connecting portion 24). As a whole, it has a substantially “?” Shape. At this time, the ear hook 14 has a general section formed with a circular section having a constant diameter of about 3 mm, and a tip section formed as a large-diameter spherical section 14 b with a spherical shape of about 6 mm in diameter.

  Then, the ear hook 14 is attached to the ear set main body 12 by rotating around the shaft-like connecting portion 24 with respect to the shaft-like connecting portion 24 of the ear set main body 12 at the base end portion 14 c of the ear hook 14. In order to achieve this, which is performed in a movable manner, the base end portion 14c of the ear hook 14 is formed in a C-shaped tube shape in a front view, and is elastically deformed so that the notch portion expands. The shaft-like connecting portion 24 is fitted.

  At this time, the base end portion 14c has a tube length set to a value of about 4 mm, and an inner diameter set to a value of about 4 mm. As a result, the ear hook 14 is configured to be rotatable with respect to the shaft-like connecting portion 24, and is maintained stationary at an arbitrary rotation angle position by friction with the shaft-like connecting portion 24. To get.

  Next, the effect of this embodiment is demonstrated.

  In the earset 10 according to the present embodiment, when the second housing portion 26 that accommodates the receiver 34 is inserted into the auricle of the user's right ear 2 and pressed against the entrance portion of the ear canal 8, the microphone 32 is inserted. The first housing portion 22 to be accommodated is arranged so as to extend substantially along the face 6.

  Then, after the ear hook 14 is rotated around the shaft-like connecting portion 24 and the tip vicinity portion 14a is hung on the upper portion of the right ear 2, the first housing portion 22 of the earset main body 12 is moved to its axis. The tip of the first housing 22 is directed toward the mouth 4 of the wearer (that is, the user wearing the earset 10). Become.

  A sound collection opening 22c is formed in the vicinity of the back wall 22a at the front end of the first housing part 22, and the sound collection opening 22c faces the mouth 4 of the wearer. Since it is in the disposed state, of the sound emitted from the wearer, the sound that circulates rearward from the mouth 4 is collected by the microphone 32 through the sound collection opening 22c. . At this time, since the sound collection opening 22c is opened in the vicinity of the face 6 in substantially parallel to the face 6, the sound emitted from the wearer is transmitted as a surface wave along the face 6. Sound will be collected efficiently.

  Moreover, in the present embodiment, an omnidirectional microphone is used as the microphone 32, and a portion in the vicinity of the back wall 22 a in the back side half 22 </ b> B of the first housing portion 22 (that is, the protrusion of the shaft-like connecting portion 24). Only one sound collection opening 22c is formed at a position not exposed on the surface opposite to the direction), and the front half 22A is not formed with a sound collection opening. And so on, and is hardly affected by wind noise, thereby enabling selective collection of the wearer's voice efficiently.

  Therefore, according to the present embodiment, even when the earset 10 having the microphone 32 and the receiver 34 is downsized, selective collection of the wearer's voice can be efficiently performed.

  In addition, the earset 10 according to the present embodiment has a microphone 32 that is configured as a high-sensitivity microphone, so that it is possible to easily ensure the volume necessary for a call.

  Further, the ear set 10 according to the present embodiment has a sound collection opening 22c formed in a slit shape along a plane perpendicular to the protruding direction of the shaft-like connecting portion 24, and is thus emitted from the wearer. Thus, the sound collection efficiency of the sound transmitted as the surface wave along the face 6 can be increased.

  The earset 10 according to the present embodiment is formed such that the back wall 22a of the first housing portion 22 extends in a planar shape along a plane orthogonal to the protruding direction of the shaft-like connecting portion 24, and A bulging portion 22c that bulges from the rear wall 22a in the same direction as the protruding direction of the shaft-like connecting portion 24 is formed at the accommodation position of the microphone 32 in the first housing portion 22, and Since the sound collection opening 22c is formed in the bulging portion 22c, the contact between the first housing portion 22 and the face 6 is performed in a state close to a point contact at the bulging portion 22c. As a result, it is possible to reduce the possibility of collecting the skin friction sound generated by the first casing portion 22 and the face 6 being rubbed together by the microphone 32.

  At this time, the sound collection opening 22c is formed in a substantially flush relationship with the general portion of the back wall 22a, so that the sound collection opening 22c is not blocked by the face 6. Thus, it is possible to enhance the sound collecting effect on the sound transmitted as the surface wave along the face 6.

  The earset 10 according to the present embodiment is configured such that the earhook 14 is attached to the earset main body 12 in a manner that it can be attached to and detached from the shaft-like connecting portion 24. 14 can be attached to the shaft-like connecting portion 24 in a state where the front and the back are reversed, and thus the earset 10 can be used for the left ear. At this time, the base end portion 14c of the ear hook 14 is configured in a C-shape when viewed from the front. The base end portion 14c is elastically deformed so that the cutout portion expands and is fitted into the shaft-like connecting portion 24. Therefore, the ear hook 14 can be easily attached and detached.

  Further, the ear set 10 according to the present embodiment is configured such that the ear hook 14 is maintained in a stationary state at an arbitrary rotation angle position with respect to the shaft-like connecting portion 24. Inadvertent rotation can be prevented, and thus the earset 10 can be handled easily.

  Furthermore, in the earset 10 according to the present embodiment, a bulging portion 22 b that bulges to the back side is formed in a portion of the back wall 22 a of the first housing portion 22 that is located on the back side of the accommodation position of the microphone 32. Therefore, the ear set 10 in a state in which the ear hook 14 is rotated to an angular position overlapping with the first housing portion 22 is used in the gap between the first housing portion 22 and the ear hook 14. When this is clipped onto clothing, the clothing can be securely sandwiched between the bulging portion 22b of the first housing portion 22 and the portion 14a near the tip of the ear hook 14, thereby enabling the earset. 10 can be prevented from falling.

  Further, in the earset 10 according to the present embodiment, since the first housing portion 22 of the earset main body 12 is formed in a substantially band plate shape having a tapered portion, the earset main body 12 is rotated. The operability as a lever can be improved. However, the first housing portion 22 may have a configuration other than this (for example, a disc shape or a substantially elliptic plate shape).

  Although the ear set 10 according to the above embodiment has been described as having a configuration including the ear set main body 12 and the ear hook 14 attached thereto, the configuration including only the ear set main body 12 without the ear hook 14 attached thereto. Even in this case, as in the above embodiment, selective sound collection of the wearer's voice can be performed efficiently.

  In addition, the numerical value shown as a specification in the said embodiment is only an example, and of course, you may set these to a different value suitably.

The front view which shows the ear set which concerns on one Embodiment of this invention II direction view of FIG. Fig. 3 arrow direction view of III Perspective view showing the earset The figure which shows the state which mounted | worn with the said ear set to a user's right ear Detailed cross-sectional view taken along line VI-VI in Fig. 5 The perspective view which shows the ear set main part of the above-mentioned ear set with a single item

Explanation of symbols

2 Right ear 4 Mouth 6 Face 8 External auditory canal 10 Ear set 12 Ear set body 14 Ear hook 14a Near tip part 14b Large diameter spherical part 14c Base end part 22 First housing part 22A Front side half 22B Rear side half 22C Domed cap 22a Back wall 22b Swelling portion 22c Sound collection opening 22d Annular flange portion 24 Axial coupling portion 26 Second housing portion 26A Front side half 26B Rear side half 26a Pressure adjusting hole 26b Sound emitting hole 32 Microphone 34 Receiver 36 Battery 38 Printed circuit board 40 Power switch

Claims (4)

An earset having a microphone and a receiver,
A first housing portion for housing the microphone, a shaft-like connecting portion projecting in a direction orthogonal to the predetermined direction at a position away from the microphone housing position in the first housing portion in a predetermined direction, and the shaft In the earset comprising the second housing part fixed in a state in which the receiver is accommodated at the tip of the connection part,
An omnidirectional microphone is used as the microphone.
A sound collection opening in a portion near the back wall located on the second housing portion side at an end portion of the first housing portion in a direction opposite to the predetermined direction, in a direction opposite to the predetermined direction. An earset characterized in that an opening is formed.   The earset according to claim 1, wherein the sound collection opening is formed in a slit shape along a plane orthogonal to the protruding direction of the shaft-like connecting portion. The back wall is formed so as to extend in a substantially planar shape along a plane orthogonal to the protruding direction of the shaft-like connecting portion,
A bulging portion that bulges from the back wall in the same direction as the protruding direction of the shaft-like connecting portion is formed at the microphone housing position in the first housing portion,
The earset according to claim 1, wherein the sound collection opening is formed in the bulging portion.   The earset according to claim 3, wherein the sound collection opening is formed in a positional relationship substantially flush with the back wall.

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