WO2019058523A1 - Speaker device - Google Patents

Abstract

[Problem] To improve fitting of a speaker device to a user's ear. [Solution] A speaker part 49 has provided therein a vibration membrane 41, a yoke 29, a voice coil 43, and a driving part 47 of the voice coil 43. A case body 57 houses and supports the speaker part 49. The case body 57 has a sound passing hole 55b for propagating a sound to the outside near the outer edge of the speaker part 49. The outer surface facing the vibration membrane 41 serves as a tragus abutment surface 55c for the user. The case body 57 has a projection part 53b that is bent in a semi-cylindrical shape so as to be projected and erected in a fan shape to the outside on the backside of the yoke 29. The projection part 53b is set as an antitragus abutment surface 53c for the user.

Description

Speaker device

The present invention relates to a speaker device, and more particularly to an improvement of an intra-concha type speaker device used for an earphone worn on a user's ear.

Conventionally, as an intra-concha type speaker device, for example, as shown in FIG. 7, one end face of a cylindrical drive magnet 5 is fixed in a cup-shaped yoke 3 disposed in a case main body 1. The vibrating membrane 7 facing the end face of the yoke is fixed to the open end of the yoke 3 and the cylindrical voice coil 9 fixed to the vibrating membrane 7 is slightly spaced on the outer periphery of the driving magnet 5 The inserted configuration is well known.

In FIG. 7, the case body 1 comprises a funnel-shaped case base 11a and a front cover 11b covering the front end (right side in the drawing), and the opening end of the yoke 3 is fixed in the front cover 11b.

Reference numeral 13 in FIG. 7 denotes a plurality of sound through holes which are formed on the front surface of the diaphragm 7 and penetrate the front cover 11b, and reference numeral 15 denotes a cable led to the outside.

In this earphone device, the drive unit 17 for vibrating the diaphragm 7 is formed by the magnet 5 and the voice coil 9, and the diaphragm 7 is vibrated by applying an audio signal to the voice coil 9 from the outside via the cable 15. A sound is produced and the sound produced is transmitted from the sound through hole 13 in front of the diaphragm 7 to the outside.

The speaker device as an actual product is to make the vibrating membrane 7 approach the concha 23 in the concha cavity 25 surrounded by the user's ear tragus 19, the toe 21, and the concha 23. And the case body 1 is inserted and positioned. That is, the speaker device described above is used by elastically supporting the case main body 1 between the tragus 19 and the antiparallel beads 21.

FIG. 7 shows a state in which the earphone device is attached to the left ear.

By the way, as a known example of the intra-concha type earphone, there are Japanese Patent Application Laid-Open Nos. 8-172691 (patent document 1) and 10-66181 (patent document 2).

Japanese Patent Application Laid-Open No. 8-172691 Japanese Patent Application Laid-Open No. 10-66181

However, the above-described speaker device has a problem that the aperture diameter of the speaker is easily limited because the case body (speaker portion) 1 enters the concha cavity 25.

That is, in the case of a user with a small size of the ear including the concha cavity 25, the tragus 19 and the antitragus 21 are strongly pressed by the case main body 1, and there is a problem that the ear is easily ache.

Conversely, for users with large ears, the gap between the external ear canal 27 and the case body 1 is large, so that the bass reproduction is insufficient, or the left side portion (upper part in FIG. 7) of the case body 1 By entering the ear canal 27, the diaphragm 7 of the speaker body 1 faces the side of the concha 23 and the diaphragm 7 separates from the ear canal 27, the reproduced sound is not sufficiently transmitted to the ear canal 27, etc. .

As described above, in the above-described speaker device, there is a problem that the mounting property easily depends on the shape and dimensions of the vibrating film 7 and the case main body 1.

Moreover, although not shown in FIG. 7, in the conventional speaker device, from the viewpoint of adjusting the sound quality to obtain a desired frequency characteristic, the vibration of the acoustic pipe of a predetermined length and the diaphragm 7 communicating the inside and outside of the case body 1 It is also known to form in the case body 1 a damping hole for damping the displacement.

When such an acoustic pipe or damping hole is formed in the case main body 1, the dimensions of the speaker device are restricted due to the manner of attachment to the user's ear, so the shape and position of the acoustic pipe or damping hole In particular, there is room for improvement in order to obtain high quality reproduced sound as well as to improve wearability.

In recent years, in the speaker device, in particular, the earphone device, higher performance has been required due to the increase in market demand for sound quality improvement such as high resolution.

Therefore, as a result of extensive researches on wearability that has not been paid much attention in the past, the present inventor has found a novel configuration and completed the present invention.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a speaker device which is easy to obtain a high quality reproduced sound as well as to improve the mountability.

In order to solve such a problem, the configuration according to the speaker device of the present invention comprises a disk-shaped diaphragm, a magnetic yoke supporting the diaphragm, and a voice coil fixed on the yoke side of the diaphragm. The speaker unit includes a speaker unit having a drive unit disposed in the yoke and configured to displace the voice coil according to an applied audio signal to vibrate the diaphragm, and a case main body for housing and supporting the speaker unit.

Moreover, the case main body is a sound through hole formed in the vicinity of the outer edge of the speaker portion, and the sound through hole for propagating the sound produced by the speaker portion to the ear canal of the user and the vibration thereof A trabecular contact surface on the outer surface facing the membrane near the membrane to abut against a tragus that faces the concha cavity of the user, and a fan on the back side of the yoke from the case main body to the outside A projecting portion which is erected and bent in a semi-cylindrical shape to form an anti-jelly contact surface for abutting on an anti-trawl facing the concha cavity And is characterized in that

The speaker device according to the present invention may be configured to be in the case main body and to select the distance between the position farthest from the sound through hole and the sound through hole in the projecting portion to be 14 mm to 24 mm.

According to the speaker device of the present invention, an acoustic pipe communicating with the inside of the case main body at one end side of the fan shape and communicating with the outside at the other end portion of the fan shape is also formed inside the projecting tip of the projecting portion. It is possible.

In the speaker device of the present invention, it is also possible to form a damping hole for acoustic braking which communicates the inside of the case body with the outside at a position surrounded by the projecting portion in the case body.

In such a configuration according to the speaker device of the present invention, the case main body is formed in the vicinity of the outer edge of the speaker portion, and the sound passing hole for propagating the sound produced to the ear canal A trabecular contact surface on the outer surface facing this to abut against the tragus, a fan-like standing from the case main body to the outside on the back side of the yoke and bent in a semi-cylindrical shape Since it is a projecting portion provided and has a projecting portion forming an anti-collar contact surface for abutting on the facing anti-parallel beads, mounting is carried out regardless of the size and shape of the case main body for housing the loudspeaker unit. It is easy to improve the quality.

In the conventional intra-concha type earphone device, since the entire case main body for housing the speaker unit is housed in the concha cavity, the diameter of the speaker unit is restricted, and it is difficult to make the speaker unit larger. Although it was difficult to improve the performance, in the present invention, since the sound through hole of the case main body is in contact with the external ear canal, approximately half of the case main body protrudes outward, so the restriction on the diameter of the speaker portion is reduced.

In the speaker device of the present invention, the configuration of the earphone device in the case main body in the configuration where the distance between the position farthest from the sound through hole and the sound through hole is selected to be 14 mm to 24 mm. The above-mentioned effects can be secured even in the case of

Moreover, with regard to the above dimensions, it is possible to set with emphasis on the mountability regardless of the speaker body aperture.

Further, the sound through hole can be formed to be long and be inserted through the external ear canal, and sound leakage from the gap can be suppressed to make bass reproduction advantageous.

In the speaker device according to the present invention, in the configuration in which an acoustic pipe communicating with the inside of the case main body at one end of the fan shape and communicating with the outside at the other fan end is formed inside the protruding tip of the projecting portion. The formation of the acoustic tube is easy, and the adjustment of the reproduction sound of high quality is possible through the adjustment of the acoustic tube.

Moreover, in this configuration, since the acoustic pipe is formed in the portion that abuts on the side opposite to the side of the concha cavity, there is little structural waste.

In the speaker device according to the present invention, the damping hole can be easily formed in the configuration in which the damping hole for acoustic braking that communicates the inside and the outside of the case body is formed at the position surrounded by the projecting portion in the case body. It is possible to adjust the quality of the reproduced sound through the adjustment of the braking holes.

In addition, in this configuration, since the braking hole is opposed to the concha cavity side, it is possible to reduce the sound leakage from the braking hole more than in the conventional speaker device.

It is a cross-sectional view (I-I cross section in FIG. 2) which concerns on the speaker apparatus of this invention. It is a front view of the speaker apparatus shown in FIG. It is a schematic perspective view of the speaker apparatus shown in FIG. It is the schematic which shows the usage example of the speaker apparatus shown in FIG. FIG. 3 is a schematic longitudinal sectional view (cross section taken along the line V-V in FIG. 2) of the speaker device shown in FIG. 2; It is a frequency characteristic figure which concerns on the speaker apparatus shown in FIG. It is a schematic sectional drawing which shows the conventional speaker apparatus with the example of its use.

Hereinafter, an embodiment of a speaker device according to the present invention will be described by taking an earphone device as an example and referring to the drawings.

1 to 3 are a cross-sectional view (a cross-sectional view taken along line II in FIG. 2), a front view and a schematic perspective view showing the configuration according to the speaker device of the present invention.

In FIGS. 1 to 3, the yoke 29 is formed into a cup shape from a magnetic plate material, and the open end side (upper side in FIG. 1) of the cylindrical portion 29a is a ring plate made of a magnetic material. The flange 31 is fixed, and a through hole is formed at the center of the bottom 29 b of the yoke 29.

In the yoke 29, a cylindrical drive magnet 33 is fixed in the yoke 29, overlapping one end face (lower side in FIG. 1) on the bottom portion 29b so as to align the hollow portion with the through hole of the bottom portion 29b; It is stored.

On the other end face (upper side in FIG. 1) of the drive magnet 33, a ring-shaped pole piece 35 having an outer diameter equal to or slightly larger than the outer diameter of the drive magnet 33 is superimposed. The pole piece 35 has a hollow portion aligned with the hollow portion of the drive magnet 33.

On the outer surface of the bottom portion 29b of the yoke 29, a circuit board 37 having a through hole at the center portion is overlapped so that the through holes of the circuit board 37 and the through holes of the bottom portion 29b are aligned.

The yoke 29, the drive magnet 33, the pole piece 35 and the circuit board 37 are formed by caulking both ends of a tubular fastener 39 which is penetrated from the pole piece 35 or the circuit board 37 through the hollow portion and the through hole thereof. Are coaxially integrated, and they are fixed to the bottom 29 b of the yoke 29.

The yoke 29, the drive magnet 33, the pole piece 35 and the circuit board 37 may be coaxially fixed by an adhesive or the like (not shown).

The pole piece 35 is formed of a magnetic material for magnetic flux concentration for obtaining high sound quality, and the outer periphery thereof is circumferentially opposed at substantially the same level position as the tip of the cylindrical portion 29 a of the yoke 29 and the inner periphery of the flange 31. doing.

A magnetic circuit is formed by the magnetic flux from the yoke 29 between the outer periphery of the pole piece 35 and the end of the cylindrical portion 29 a of the yoke 29 and the inner peripheral portion of the flange 31 opposed to each other with a slight gap therebetween. .

The vibrating film 41 is formed in a disk shape from a conventionally known thin and translucent insulating film material, and has a central region 41a formed by slightly expanding a relatively wide central portion into a dome shape, and the central region 41a concentrically. And an annular peripheral region 41b.

The vibrating membrane 41 has a space with respect to the flange 31 and the pole piece 35 and covers them, and the entire outer periphery of the outer peripheral region 41 b is fixed to the outer peripheral portion of the flange 31 with an adhesive or the like and supported thereby. .

A voice coil 43 formed by cylindrically winding a thin insulated wire covered with an insulating coating at an annular boundary between the central region 41a and the outer peripheral region 41b on one surface side (lower surface side in FIG. 1) of the vibrating membrane 41. One end face side is fixed so as to surround the central region 41a.

The voice coil 43 has an annular gap between the inner wall of the cylindrical portion 29 a of the yoke 29 and the inner peripheral portion of the flange 31 and the outer periphery of the drive magnet 33 and the pole piece 35. , And is annularly opposed to the flange 31, the yoke 29 and the drive magnet 33, respectively.

Two end lead wires (not shown) from the voice coil 43 are drawn inward from the root of the voice coil 43, are drawn out through the hollow portion 39a of the bolt 39, and are connected to the circuit board 37. ing.

An audio signal is supplied from an electronic device (not shown) to the circuit board 37 superimposed on the bottom 29 b of the yoke 29 by a cable 45 described later. The voice coil 43 is displaced by the application of the voice signal from the circuit board 37 to the voice coil 43 through the lead wires at both ends, and the vibrating membrane 41 is driven to cause vibration displacement.

That is, the yoke 29, the drive magnet 33, and the voice coil 43 form a drive unit 47 for driving the diaphragm 41, and a so-called internal magnet type speaker unit 49 is formed.

In addition, the code | symbol 51 in FIG. 1 is an acoustic damping member for acoustic impedance adjustment which plugs up the hollow part 39a of the gutter 39 by the lower end surface in the figure, and it is rich in breathability.

As shown in FIGS. 2 and 3, the speaker unit 49 has a case base 53 made of synthetic resin as a first case member and a front cover 55 made of synthetic resin as a second case member mutually overlapping. It is stored and supported in the case main body 57 in which the inner storage space is formed.

That is, the case base 53 has a circular outer edge and is formed in a generally flat hemispherical shape, and the front cover 55 has an outer edge formed in substantially the same circle as the case base 53 and is generally formed in a flat shape.

As shown in FIG. 1, the case base 53 is integrated with the inside of the open front end of the front cover 55 so that the open front end sandwiches the flange 31 of the speaker unit 49 with the front cover 55.

A sound passing cylinder 55a that protrudes outward and slightly upward in FIG. 1 is formed in the front cover 55 near the outer edge of the speaker 49, thereby forming a sound passing hole 55b that communicates the inside and the outside of the case body 57. It is done. The sound from the vibrating membrane 41 is transmitted from the sound through hole 55b to the ear canal 59 of the user's ear, as shown in FIG.

In the front cover 55, the outer surface facing the vibrating membrane 41 in the vicinity of the vibrating membrane 41 forms a tragus contact surface 55c for contacting the tragus 63 facing the concha cavity 61 of the user.

Returning to FIG. 1, in the case base 53, a cylindrical support column 53a is provided so as to protrude from the opposite side to the sound passing cylinder 55a, ie, at a position far from the sound passing cylinder 55a (see FIGS. 2 and 3). ). The support column 53a is formed in such a positional relationship that the virtual center line penetrates the page of FIG. 1 and is orthogonal to the support column 53a, and is supported by the case base 53.

The cable 45 inserted from the outside into the support column 53 a is introduced into the case base 53 from the middle of the support column 53 a and is connected to the circuit board 37.

In the case base 53, as shown in FIG. 3, there is formed a projecting portion 53b which is provided on the back side of the yoke 29 so as to stand outward in a fan shape and bent in a semi-cylindrical shape. .

The protruding portion 53 b has a surface 37 c against which the outer surface of the distal end abuts on the antitragus ball 65 facing the concha cavity 61 of the user.

In the case main body 57, as shown in FIG. 4, an interval A between a position farthest from the tip of the sound through hole 55b (the sound through cylinder 55a) of the protrusion 53b and the sound through hole 55b is, for example, It is selected from 14 mm to 24 mm, and the earphone device has dimensions suitable for the user's ear.

In the conventional intra-concha type speaker device shown in FIG. 7, it is general to set the outer diameter of the case body 1 to about φ17 mm at maximum.

On the other hand, in the speaker device according to the present invention, as shown in FIG. 4, the anti-tracheal contact portion 53 c and the tragus-abutment surface 55 c are fixed between the tragus 63 and the antitragus 65. There is no problem in terms of wearability and sound quality even if the dimension of is set to 19 mm.

In addition, it is possible to maintain good fit and sound quality by forming the sound tube 55a like an elephant's nose and extending it toward the ear canal 59 or vice versa. Therefore, in the configuration described above, it is preferable to set the value of the interval A to ± 5 mm.

An elongated acoustic pipe 67 communicating with the inside of the case main body 57 on one end side of the fan shape and being connected to the outside at the other end portion of the fan shape is formed inside the tip end of the projecting portion 53b. Reference numeral 67 a in FIGS. 3 and 4 is an opening that leads from the acoustic tube 67 to the outside.

In order to form the acoustic tube 67, as shown in FIG. 1, in the case base 53, a fan-shaped projecting portion 53b is formed so as to form a narrow convex inner space 53d. As shown in the figure, the arc strip 69 formed separately from the case base 53 and along the arc of the projecting portion 53b is formed in the case base 53 by closing it against the convex inner space 53d. It is possible.

FIG. 5 shows a cross section between V and V in FIG. 2 and, for the sake of clarity, the arc strip 69 is illustrated as being straight, but as can also be understood from FIG. In fact, it is curved in an arc shape, and is accommodated and fixed in the case base 53. In FIG. 5, the speaker unit 49 is schematically shown.

The acoustic tube 67 itself is formed to be curved along the tip inside of the tip of the projecting portion 53b.

Further, in the case base 53, at a position surrounded by the protruding portion 53b, a damping hole 71 for acoustic damping, which communicates the case main body 57 with the outside, is formed to penetrate. The braking hole 71 is closed by an acoustic braking member 73 that adjusts the air permeability according to the required performance.

In such a speaker device, by supplying an audio signal from the cable 45 through the circuit board 37 and applying the audio signal to the voice coil 43, the drive unit 31 causes the diaphragm 41 to vibrate and produce sound, and the sound through hole 55b is generated. Vibration sound is transmitted to the outside from the

Then, as shown in FIG. 4, in the speaker device according to the present invention, the tragus contact surface 55c is brought into contact with the user's tragus 63, and the projecting portion 53b (anti-tracheal contact portion 53c) As the sound through hole 55b is slightly inserted into the external ear canal 59 while being in contact with the outer ear canal 59, the half of the sound through hole 55b side of the case main body 57 is surrounded by the tragus 63 It is used by inserting and inserting into the catheter 61.

In the case body 57, the half that is far from the sound through hole 55b will protrude from the concha cavity 61 to the outside.

In addition, it is thought that the work becomes easier if the case main body 57 is attached and removed by pinching the support post 53a and the like.

FIG. 6 is a frequency characteristic diagram shown by the above-described speaker device of the present invention and the conventional speaker device of FIG. 7, for example.

In the configuration according to the speaker device of the present invention, as in the frequency characteristics shown by the solid line a in FIG. 6, the sound pressure characteristics are particularly good down to the low range, and high quality sound reproduction is possible in a wide frequency range. It can be seen that the sound pressure characteristics of the above speaker device are exhibited. The broken line b in FIG. 6 shows the same characteristic when the acoustic tube 67 is closed in the configuration of FIG. In this figure, the low band reproduction capability of the acoustic tube 67 is shown.

In the configuration according to the speaker device of the present invention, the sound passage 55b (the sound tube 55a) of the case main body 57 is fitted to the entrance of the user's ear canal 59, and the tragus contact surface 55c of the case main body 57 is Abuts on the user's tragus 63 and abuts the projecting portion 53b of the case main body 57 on the anti-trawl 65 of the user as the anti-collar contact surface 53c, Since the bead contact surface 53c is configured to be held between the tragus 63 and the anti-tail 65, there is an advantage that the shape and size of the case main body 57 hardly depends on the mountability. Regardless of it, it is easy to improve the mountability.

That is, even if the outer diameter dimension of the vibrating membrane 41 is small or large, it is possible to suppress the dimension between the tragus contact surface 55c of the case main body 57 and the antitragebra contact surface 53c within a certain narrow range. , It is easy to ensure stable holding of the case main body 57.

Further, in the speaker device according to the present invention, in the case main body 57, the distance between the position farthest from the sound through hole 55b and the sound through hole 55b in the projecting portion 53b is 14 mm to 24 mm. Even in the configuration of the earphone device, the above-described effects can be secured.

Moreover, such dimensions can be set with emphasis on the mountability irrespective of the diameter of the case main body 57.

The sound through hole 55b of the case main body 57 can be formed to be long and be inserted into the external ear canal 59, so that sound leakage from the gap can be suppressed and good bass reproduction can be maintained. It is.

Further, since the braking holes 71 face the side of the concha cavity 61, it is possible to reduce the amount of sound leakage from the braking holes 71 more than in the conventional speaker device, resulting in less waste in structure.

Moreover, in the speaker device according to the present invention, it is easy to form the sound quality adjustment sound pipe 67 of a predetermined length inside the projecting portion 53b by using the projecting portion 53b, and the vibration displacement of the diaphragm 41 is damped. The braking hole 71 to be applied is also easily formed in the case main body 57.

As described above, in the speaker device of the present invention, the dimensions do not easily affect the mountability, and the arrangement space for the acoustic pipe 67 and the braking hole 71 is easy to secure. If the selection is made and the inner diameter of the damping hole 71 is also appropriately selected, it is easy to improve the mountability and to obtain high-quality reproduced sound.

Further, the speaker device according to the present invention is not limited to the above-described configuration of the speaker 49, but may be a disk-shaped diaphragm, a magnetic yoke for supporting the diaphragm, and a voice coil fixed on the yoke side of the diaphragm. And a driving unit for displacing the voice coil by the voice signal disposed and applied to the yoke to cause the vibrating membrane to vibrate and drive.

DESCRIPTION OF SYMBOLS 1, 57 Case main body 3, 29 Yoke 5, 33 Drive magnet 7, 41 Vibrating film 9, 43 Voice coil 11a Case base 11b Front cover 13, 55b Sound through hole 15, 45 Cable 17, 47 Drive part 19, 63 Tragus 21, 65 Tulle 23, 75 Ear Concha 25, 61 Ear Concha Cavity 27, 59 Outer Ear Canal 29 a Tubular Part 29 b Bottom Part 31 Flange 35 Pole Piece 37 Circuit Board 39 Fastener 39 a Hollow Part 41 a Central Area 41 b Outer Area 49 Speaker Parts 51, 71, 73 Acoustic damping member 53 Case base (first case member: case body)
53a support column 53b protruding portion 53c anti-collar contact surface 53d internal space 55 front cover (second case member: case main body)
55a sound through tube 55c tragus contact surface 67 acoustic tube 67a opening 69 arc strip 71 braking hole

Claims (4)

A disk-like diaphragm, a magnetic yoke supporting the same, a voice coil fixed on the yoke side of the diaphragm, and a voice signal disposed on the yoke and displaced are used to displace the voice coil A speaker unit having a drive unit for driving the vibration film to vibrate.
A case body for housing and supporting the speaker unit;
Equipped with
The case body is a sound through hole formed in the vicinity of the outer edge of the speaker unit, and the sound through hole for transmitting the sound produced by the speaker unit to the ear canal of the user's ear; the vibration A trabecular contact surface on the outer surface facing the membrane near the membrane to abut against a tragus that faces the concha cavity of the user, and on the back side of the yoke from the case body to the outside A projecting portion which is erected in a fan-like shape and bent in a semi-cylindrical shape to form an anti-javeling contact surface for abutting on an anti-collar facing the concha cavity An electro-acoustic transducer characterized by comprising: The electro-acoustic transducer according to claim 2, wherein in the case main body, a distance between a position farthest from the sound passage and the sound passage in the projecting portion is selected to be 14 mm to 24 mm. The electric pipe according to claim 1 or 2, wherein an acoustic pipe communicating with the inside of the case main body at one end side of the fan shape and connecting to the outside at the other end portion of the fan shape is formed inside the protruding tip of the protruding portion. Sound converter. The electro-acoustic transducer according to any one of claims 1 to 3, wherein a damping hole for acoustic damping is formed at a position surrounded by the projecting portion in the case main body for communicating the inside of the case main body with the outside.

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