JP2017034628A - Voice output device and voice input/output device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a voice output device capable of improving a performance of echo cancellation by preventing noise from being generated by a sound that is generated by a speaker unit.SOLUTION: A voice output device comprises: an inner box 32 as a first housing including a speaker unit 30; an outer box 2 as a second casing covering the inner box 32; and a microphone 4 that is fitted to the outer box 2. In at least either a top plate 2a or a bottom plate 2c of the outer box 2, a connection part 27 that is connected with a surface of the inner box 32, and an outer frame part 26 enclosing the connection part 27 are connected by a meandering spring-shaped part 25 with which slits 24 are formed alternately.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technology of an audio output device and an audio input / output device.

  For example, in a system for realizing a hands-free call in an automobile, a speaker box incorporating a speaker unit and a microphone is directly attached to the interior surface of the automobile (for example, Patent Document 1).

WO2014 / 203380A1

However, when the user listens to music, the interior surface may vibrate due to the sound emitted from the speaker unit attached to the interior surface of the automobile, resulting in noise.
In addition, when the user is listening to the other party's voice in a hands-free manner, the interior surface vibrates due to the sound emitted by the speaker unit attached to the interior surface, and is transmitted to the microphone near the speaker unit. The vibration was picked up and the performance of echo cancellation realized by hands-free calling was lowered.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to prevent the generation of noise due to the sound emitted from the speaker unit and to improve the performance of echo cancellation and the sound input / output device. Is to provide.

In order to achieve the above object, an audio output device according to an aspect of the present invention includes a first housing that encloses a speaker unit, and a second housing that covers the first housing, At least one of the plurality of plates forming the second housing includes a spring-like portion, and the plate provided with the spring-like portion is connected to the surface of the first housing. A connection portion is provided, and one end of the spring-like portion is connected to the connection portion.
It is characterized by that.

  According to one aspect of the present invention, when sound is emitted from the speaker unit, vibration due to the sound is transmitted to the connection portion connected to the surface of the first housing. However, the connecting portion is connected to one end of the spring-like portion. Therefore, the vibration transmitted to the connection part is absorbed by the spring-like part, and even when the audio output device is attached to the interior surface of the automobile, the vibration due to the sound from the speaker unit is suppressed from being transmitted to the interior surface, and noise is reduced. Preventing the occurrence of In addition, by suppressing the vibration caused by the sound from the speaker unit from being transmitted to the interior surface etc., noise caused by the vibration becomes difficult to be transmitted to the microphone even when the microphone is provided close to the speaker unit. Therefore, the performance deterioration of echo cancellation is prevented. Moreover, since the said board is provided with the connection part and the spring-like part, the number of parts at the time of an assembly reduces, and an assembly man-hour also reduces.

  In the aspect of the present invention, the spring-like portion may have a meandering structure. In this case, a spring-like portion is easily provided on at least one of the upper plate and the bottom plate of the second casing.

  1 aspect of this invention WHEREIN: The other end of the said spring-shaped part may be connected to the outer frame part of the board provided with the said spring-shaped part, and the said connection part may be enclosed by the said outer frame part. Even in this case, the number of parts at the time of assembling is reduced and the number of assembling steps is also reduced while preventing the generation of noise and preventing the performance deterioration of echo cancellation.

  In one aspect of the present invention, the spring-like portion may be formed to protrude in a direction toward the surface of the first housing. Even in this case, the number of parts at the time of assembling is reduced and the number of assembling steps is also reduced while preventing the generation of noise and preventing the performance deterioration of echo cancellation.

  In one aspect of the present invention, the plate provided with the spring-like portion may be formed of resin. In this case, a plate having a spring-like portion and a connecting portion is easily formed.

  The present invention can also be understood as a voice input / output device having a microphone in the second casing of the voice output device described above.

FIG. 1 is a six-side view illustrating a schematic configuration of an audio output device 1 according to the first embodiment, in which FIG. 1A is a rear view, FIG. 1B is a left side view, and FIG. 1 (d) is a right side view, FIG. 1 (e) is a front view, and FIG. 1 (f) is a bottom view. It is a top view which shows schematic structure of the lower board of an outer box. FIG. 3 is a six-view diagram illustrating a schematic configuration of the speaker 3 according to the first embodiment, in which FIG. 3A is a rear view, FIG. 3B is a left side view, FIG. 3C is a top view, and FIG. d) is a right side view, FIG. 3 (e) is a front view, and FIG. 3 (f) is a bottom view. It is the sectional view on the AA line of FIG.1 (c). It is sectional drawing which shows schematic structure of the audio | voice output apparatus 1 which concerns on 2nd Embodiment.

Embodiments of the present invention will be described below with reference to the drawings. Note that the first casing is described as an inner box, and the second casing is described as an outer box.
<First Embodiment>
FIG. 1 is a six-sided view illustrating a schematic configuration of the audio output device 1 according to the first embodiment. FIG. 1A is a rear view, FIG. 1B is a left side view, and FIG. FIG. 1D is a right side view, FIG. 1E is a front view, and FIG. 1F is a bottom view.
As shown in these drawings, the audio output device 1 includes an outer box 2, a speaker 3, and a microphone 4. The outer box 2 includes an upper plate 2a, a side plate 2b, and a bottom plate 2c, and a hole 20 through which the speaker unit 30 is exposed is formed in the upper plate 2a. A plurality of holes 21 are formed in the side plate 2b. In addition, description of the side plate 2b is abbreviate | omitted in FIG.1 (d). Furthermore, the outer box 2 is formed of, for example, resin.
A recess 23 is formed in the upper plate 2 a, and the microphone 4 is accommodated in an accommodation portion (not shown) communicating with the recess 23. The microphones 4 are provided at two locations on the back side of the rectangular substrate, but the microphones may be provided at one location or at two or more locations. The microphone 4 is, for example, a MEMS microphone.
For example, the audio output device 1 is attached to the interior of an automobile, and the upper plate 2a of the outer box 2 is attached so as to face the back surface of the interior that cannot be seen from inside the automobile.

  FIG. 2 is a bottom view showing a schematic configuration of the bottom plate 2c according to the first embodiment. As shown in FIG. 2, the bottom plate 2 c includes meandering spring-like portions 25 in which slits 24 are alternately formed. One end of the spring-like portion 25 is formed integrally with the outer frame portion 26 which is a part of the bottom plate 2 c, and the other end is formed integrally with a connection portion 27 connected to the surface of the inner box 32 of the speaker 3. In the connecting portion 27, four screw holes 28 are formed in accordance with the position of the screw hole 33 (see FIG. 3) provided on the bottom surface of the inner box 32 (see FIG. 3) of the speaker 3. The inner box 32 of the speaker 3 is attached to the connecting portion 27 by screwing. The connecting portion 27 is formed in a cross shape, and is surrounded by the outer frame portion 26 as illustrated in FIG. 2, and is separated from the outer frame portion 26.

FIG. 3 is a six-sided view illustrating a schematic configuration of the speaker 3 according to the first embodiment, FIG. 3A is a rear view, FIG. 3B is a left side view, and FIG. 3C is a top view. 3D is a right side view, FIG. 3E is a front view, and FIG. 3F is a bottom view. FIG. 4 is a cross-sectional view illustrating a schematic configuration of the audio output device 1 according to the first embodiment.
As shown in these drawings, the speaker 3 has a configuration in which a speaker unit 30 is included in an inner box 32, and screw holes 33 are formed at four locations on the bottom surface of the inner box 32.
In the present embodiment, the bottom surface of the speaker 3 is formed in a flat plate shape as shown in FIG. 3, and the positional relationship between the bottom surface portion 31 and the bottom surface of the speaker unit 30 is as shown in FIG. It has become.

FIG. 4 is a cross-sectional view taken along line AA in FIG. By aligning the positions of the screw holes 33 formed on the bottom surface of the inner box 32 of the speaker 3 and the screw holes 28 formed on the bottom plate 2c of the outer box 2, and attaching the screws from the bottom plate 2c side of the outer box 2, The inner box 32 of the speaker 3 is attached to the connecting portion 27 of the bottom plate 2 c of the outer box 2.
Further, as shown in FIG. 4, the upper plate 2 a of the outer box 2 and the upper surface of the inner box 32 of the speaker 3 are arranged so as to be separated from each other. When sound is emitted by the speaker unit 30 of the speaker 3, vibration due to the sound is transmitted to the connection unit 27. However, the connecting portion 27 is separated from the outer frame portion 26 as described above, and is connected to the outer frame portion 26 by meandering spring-like portions 25 in which slits 24 are alternately formed.
Therefore, the vibration transmitted to the connecting portion 27 is absorbed by the spring-like portion 25 and is not transmitted to the outer frame portion 26. That is, vibration due to the sound of the speaker unit 30 is not transmitted to the outer box 2. Further, since the upper surface of the speaker 3 is separated from the inner surface of the outer box 2, vibration due to the sound of the speaker unit 30 is not transmitted to the outer box 2.
As a result, even when the audio output device 1 is attached to the interior surface of the automobile, it is possible to suppress the vibration due to the sound from the speaker unit 30 from being transmitted to the interior surface and to prevent the generation of noise. In addition, by suppressing the vibration caused by the sound from the speaker unit 30 from being transmitted to the interior surface, the noise caused by the vibration becomes difficult to be transmitted to the microphone 4 provided in the vicinity of the speaker unit 30. It is possible to prevent the performance deterioration of echo cancellation.

  Moreover, the hole 20 is formed in the upper surface of the outer box 2, the some hole 21 is formed in the side surface, and the slit 24 is formed in the bottom plate 2c. Therefore, even when the inner box 32 of the speaker 3 is deformed by the generation of sound, the hollow pressure between the inner box 32 and the outer box 2 does not increase, and the occurrence of extra distortion of the outer box 2 is suppressed. be able to. As a result, generation of noise is prevented, and deterioration in performance of echo cancellation is prevented.

  Furthermore, since resin is used as the material of the bottom plate 2c, the bottom plate 2c including the spring-like portion 25, the outer frame portion 26, and the connection portion 27 described above can be easily formed by integral formation. As a result, the number of parts at the time of assembly can be reduced, and the number of assembly steps can be reduced.

Second Embodiment
Next, a second embodiment of the present invention will be described with reference to FIG.
FIG. 5 is a cross-sectional view showing a schematic configuration of the audio output device 1 in the present embodiment, and corresponds to FIG. 4 in the first embodiment.
In the present embodiment, the spring-like portion 25 formed integrally with the bottom plate 2 c is formed so as to protrude in the direction from the inner surface of the bottom plate 2 c toward the bottom surface of the inner box 32. In this case, the connecting portion 27 becomes an end surface of the spring-like portion 25 that contacts the bottom surface of the inner box 32. In addition, this invention is not necessarily limited to such an example, You may make it enlarge the area of the end surface of the spring-like part 25 as the connection part 27. FIG.
In the case of this embodiment, what is necessary is just to connect the connection part 27 and the bottom face of the inner box 32 using an adhesive agent.

Also in the present embodiment, when sound is emitted from the speaker unit 30 of the speaker 3, vibration due to the sound is transmitted to the connection unit 27. The vibration transmitted to the connecting portion 27 is absorbed by the spring-like portion 25 and is not transmitted to the bottom plate 2 c of the outer box 2. Therefore, even when the audio output device 1 is attached to the interior surface of the automobile, it is possible to suppress the vibration due to the sound from the speaker unit 30 from being transmitted to the interior surface and to prevent the generation of noise. In addition, by suppressing the vibration caused by the sound from the speaker unit 30 from being transmitted to the interior surface, the noise caused by the vibration becomes difficult to be transmitted to the microphone 4 provided in the vicinity of the speaker unit 30. It is possible to prevent the performance deterioration of echo cancellation.
Also in the present embodiment, since the resin is used as the material of the bottom plate 2c, the bottom plate 2c including the spring-like portion 25 and the connecting portion 27 described above can be easily formed. As a result, the number of parts at the time of assembly can be reduced, and the number of assembly steps can be reduced.

<Modification>
The present invention is not limited to the above-described embodiments, and various modifications as described below are possible, for example. Moreover, the aspect of the deformation | transformation described below can also combine suitably arbitrarily selected 1 or several.

(Modification 1)
In the first embodiment and the second embodiment, the shape of the spring-like portion 25 is a shape in which rectangular members are connected in a meandering manner, but the present invention is not limited to such a configuration. A rounded shape such as a sine wave shape or a jagged shape such as a triangular wave shape may be used.
In the first embodiment, the spring-like portions 25 are provided at four locations on the bottom plate 2c. However, the present invention is not limited to such a configuration, and the number and positions of locations where the spring-like portions 25 are provided. Can be appropriately changed.
Furthermore, in the first embodiment, the shape of the connection portion 27 is a cross shape, but the present invention is not limited to such a configuration, and the shape of the connection portion 27 can be changed as appropriate.

(Modification 2)
In 1st Embodiment and 2nd Embodiment, it was set as the structure which provides the spring-like part 25 and the connection part 27 in the baseplate 2c of the outer case 2, However, this invention is not necessarily limited to such a structure, The upper plate 2a or the side plate 2b of the box 2 may be provided with the spring-like portion 25 and the connecting portion 27. Moreover, you may provide the spring-like part 25 and the connection part 27 in all of the upper board 2a and the bottom board 2c, or all the upper board 2a, the bottom board 2c, and the side board 2b.

(Modification 3)
In the first embodiment and the second embodiment, the top plate 2a and the bottom plate 2c are formed of resin. However, the present invention is not limited to such a configuration, and the elastic force of a thin metal or the like is not limited. A certain member may be used.

DESCRIPTION OF SYMBOLS 1 ... Audio | voice output device, 2 ... Outer box, 2a ... Top plate, 2b ... Side plate, 2c ... Bottom plate, 3 ... Speaker, 4 ... Microphone, 20, 21 ... Hole, 23 ... Recessed part, 24 ... Slit, 25 ... Spring shape 26, outer frame portion, 27 ... connection portion, 28 ... screw hole, 30 ... speaker unit, 31 ... bottom surface portion, 32 ... inner box, 33 ... screw hole.

Claims (6)

A first housing containing the speaker unit;
A second housing covering the first housing,
At least one of the plurality of plates forming the second housing includes a spring-like portion,
The plate provided with the spring-like portion includes a connection portion connected to the surface of the first housing,
One end of the spring-like part is connected to the connection part,
An audio output device characterized by that. The audio output device according to claim 1, wherein the spring-like portion has a meandering structure. The other end of the spring-like part is connected to an outer frame part of a plate provided with the spring-like part,
The connection part is surrounded by the outer frame part,
The audio output device according to claim 1, wherein the audio output device is an audio output device. The spring-like portion is formed to project in a direction toward the surface of the first housing.
The audio output device according to claim 1, wherein the audio output device is an audio output device. The plate provided with the spring-like portion is formed of resin.
The audio output device according to any one of claims 1 to 4, wherein the audio output device is provided. An audio input / output device comprising a microphone in the second housing of the audio output device according to claim 1.

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