JP2011035572A - Electronic device with built-in speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device in which a housing 1 incorporates the speaker 4 and has a sound output port 11 opened therein, the electronic device allowing a sound guide portion for guiding sound emitted from the speaker 4 up to the sound output port 11 to be installed in a small space and suppressing the attenuation of the sound transmitted through the sound guide portion. <P>SOLUTION: In the electronic device with the built-in speaker, the sound guide portion for guiding the sound emitted from the speaker 4 up to the sound output port 11 is formed in the housing 1 and has a flat sound space 55 expanding along a wall surface of the housing 1, and a thickness of the sound space 55 in a direction orthogonal to the wall surface of the housing 1 are smaller than a width in a direction orthogonal to a sound guide direction, and the sound output port 11 is disposed in a center of a wall surface area of the housing 1, which faces the sound space 55. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electronic device with a built-in speaker, such as a camera or a mobile phone.

  Conventionally, in this type of electronic device, a speaker is built in a small portable housing, and a sound emission hole for releasing sound emitted from the speaker to the outside of the housing is opened. Is formed with a sound guide portion for guiding the sound emitted from the speaker to the sound emitting hole (see Patent Documents 1 and 2).

  According to such an electronic device, even when the position of the speaker is deviated from the position facing the sound emission hole, the sound emitted from the speaker is guided to the sound emission hole through the sound introduction unit, and finally In other words, the sound is emitted from the sound emission hole to the outside.

JP 2001-197182 A Japanese Patent Laid-Open No. 9-321650

  However, in an electronic device with a built-in speaker, many parts are arranged in a small housing, and it is necessary to place the speaker at a position where it does not interfere with these parts. Since the sound guiding part that guides the sound to the sound emitting hole needs to be arranged using a narrow space in the housing, the sound guiding part has to be gradually narrowed along the sound guiding direction, As a result, there has been a problem that sound emitted from the speaker is greatly attenuated in the process of traveling through the sound guide section, and the sound pressure is significantly reduced.

  Accordingly, an object of the present invention is to install a sound guide part that guides sound emitted from the speaker to the sound emission hole by using a narrow space in the housing, and the sound emitted from the speaker is still inside the sound guide part. It is an object of the present invention to provide an electronic device with a built-in speaker that is not greatly attenuated in the process of traveling through the speaker.

In the electronic apparatus with a built-in speaker according to the present invention, a speaker is built in a small portable housing, and a sound emitting hole for releasing sound emitted from the speaker to the outside of the housing is opened.
Here, a sound guide part for guiding the sound emitted from the speaker to the sound emitting hole is formed inside the housing, and the sound guide part has a flat acoustic space extending along the wall surface of the housing. The acoustic space has a thickness dimension in a direction perpendicular to the wall surface of the housing smaller than a width dimension in a direction perpendicular to the sound guide direction of the sound guide portion, and a central portion of the wall surface region of the housing facing the acoustic space. The sound emitting holes are arranged in the.

  According to the electronic device with a built-in speaker of the present invention, even if the speaker is arranged at a position where it does not interfere with the components in the housing, the sound guide section that guides the sound emitted from the speaker to the sound emitting hole is It can be formed in a flat outer shape that extends along the wall surface of the housing, and can be arranged in a narrow space along the wall surface of the housing.

In this case, the acoustic space of the sound guide portion must be thin in the direction orthogonal to the wall surface of the housing, but the width of the sound guide portion in the direction orthogonal to the sound guide direction depends on the width of the housing. By forming it as large as possible, the volume of the acoustic space can be expanded as much as possible. Thereby, attenuation of the sound transmitted through the sound guide portion can be suppressed.
However, since the sound emitting hole is arranged in the center of the wall surface area of the housing facing the acoustic space, the sound in the sound guiding part is released from the sound emitting hole to the outside without greatly reducing the sound pressure. Will be.

In a specific aspect, the housing has a rectangular parallelepiped shape, forms a circular arc surface in which at least one corner portion bulges outward, the flat plate is provided with the speaker facing the back surface of the corner portion, and extends from the corner portion. The sound emitting hole is formed in the wall.
Further, a waterproof sheet is installed on the back surface of the flat plate wall portion of the housing to prevent water from entering the housing through the sound emission holes.

  According to this specific aspect, the dead space can be effectively utilized by using the inside of the corner portion of the housing as the housing position of the speaker. In addition, a waterproof sheet for preventing water from entering the housing from the sound emission hole can be installed on the back surface of the flat plate wall portion of the housing, thereby realizing a highly reliable waterproof structure. .

  In another specific aspect, the sound guide member includes a sound guide member that forms the sound guide portion, and the sound guide member includes a sound source portion that houses the speaker and a sound guide wall portion that forms the acoustic space. The sound guide member is installed with the sound guide wall portion facing the flat plate wall portion of the housing, and the acoustic space is formed by the sound guide wall portion and the flat plate wall portion, and a central portion of the flat plate wall portion. The sound emitting hole is opened in

  According to this specific aspect, since the acoustic space can be formed by using a part of the housing (flat plate wall portion), the sound guide member can be thinned and the housing can be miniaturized.

  In still another specific aspect, the sound source portion of the sound guide member includes a speaker storage space in which a speaker is stored and a first acoustic space facing the speaker storage space. The acoustic space formed by the sound guide wall portion and the flat plate wall portion of the housing becomes the second acoustic space, and the sound is guided from the first acoustic space to the second acoustic space.

  According to this specific aspect, the acoustic characteristics can be adjusted by variably setting the volume of the first acoustic space with respect to the second acoustic space.

  According to the electronic apparatus with a built-in speaker according to the present invention, the sound guide portion that guides the sound emitted from the speaker to the sound emitting hole can be installed using a narrow space in the housing, and the sound from the speaker is It is possible to effectively suppress the attenuation of the process transmitted through the sound guide section.

FIG. 1 is a perspective view of a camera according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the main part of the camera. FIG. 3 is a cross-sectional view of the main part of the camera. FIG. 4 is a perspective view of a sound guide member provided in the camera. FIG. 5 is a perspective view of the sound guide member cut along the line AA in FIG. 4. FIG. 6 is a perspective view showing another configuration example of the sound guide member. FIG. 7 is a perspective view showing still another configuration example of the sound guide member.

Hereinafter, embodiments of the present invention in a camera will be described in detail with reference to the drawings.
As shown in FIG. 1, a camera according to an embodiment of the present invention includes a rectangular parallelepiped housing (1) with four corners provided with Rs, and the housing (1) includes a photographing window (2). ) And shutter button (3).

  The housing (1) has a built-in speaker (4) facing the back surface of one corner (12), and a flat plate wall (10) connected from the corner (12) has a speaker. A sound emission hole (11) is provided for releasing sound emitted from (4) to the outside of the housing (1).

As shown in FIG. 2, the speaker (4) is disposed on the back side of the corner (12) of the housing (1) while being attached to the sound guide member (5).
The sound guide member (5) includes a sound source part (51) for housing the speaker (4), and a flat plate-like sound guide wall extending from the sound source part (51) along the flat plate wall part (10) of the housing (1). A support plate (13) for supporting the sound source portion (51) of the sound guide member (5) is formed in the housing (1), and the sound guide member (5) A boss (56) for screwing the tip of the sound guide wall (52) is formed.
Further, a concave portion (14) for attaching a waterproof sheet to be described later is formed in a region including the sound emission hole (11) on the back surface of the flat plate wall portion (10) of the housing (1).

  As shown in FIGS. 4 and 5, the sound source part (51) of the sound guide member (5) has a cylindrical speaker storage space (53) and a first acoustic space communicating with the speaker storage space (53). (54) is formed. Further, the sound guide wall portion (52) of the sound guide member (5) is formed along a rectangular flat plate portion (52a) extending in a direction orthogonal to the tube axis direction of the speaker housing space (53) and the periphery of the flat plate portion. And a rib portion (52b) extending in the direction.

As shown in FIG. 3, with the sound guide member (5) attached to the inner surface of the housing (1), the sound outlet of the speaker (4) is placed inside the sound source section (51) of the sound guide member (5). A first acoustic space (54) is formed on the side, and a first acoustic space is provided between the sound guide wall portion (52) of the sound guide member (5) and the flat plate wall portion (10) of the housing (1). A second acoustic space (55) communicating with the space (54) is formed. The sound emitting hole (11) of the housing (1) is opposed to the central portion of the second acoustic space (55).
Further, a waterproof sheet (8) is attached to the inner surface of the flat plate wall portion (10) of the housing (1) to prevent water from entering from the sound emitting hole (11).

  The sound emitted from the speaker (4) propagates through the first acoustic space (54) in the direction perpendicular to the flat plate wall (10) of the housing (1) as indicated by the broken arrow, and then turns to about 90 degrees. Instead, it propagates through the second acoustic space (55) along the flat plate wall portion (10) of the housing (1) and is finally released from the sound emitting hole (11) to the outside of the housing (1).

  Here, the second acoustic space (55) is orthogonal to the acoustic propagation direction while the thickness in the direction orthogonal to the flat plate wall portion (10) of the housing (1) is as small as 0.7 to 0.8 mm, for example. Since the width in the direction to travel is as large as about 8 mm according to the width of the housing (1) and the length in the direction along the sound propagation direction is as large as about 15 mm, the volume is sufficiently large. Thereby, attenuation of the sound transmitted through the second acoustic space (55) can be effectively suppressed.

  However, since the sound emitting hole (11) is arranged at the center of the flat plate wall portion (10) of the housing (1) facing the second acoustic space (55), the sound in the second acoustic space (55) is arranged. Is released to the outside from the sound emitting hole (11) without the sound pressure being greatly reduced.

  As described above, according to the camera which is one embodiment of the present invention, the dead space can be effectively utilized by using the inside of the corner portion (12) of the housing (1) as the housing position of the speaker (4). A waterproof sheet (8) for preventing water from entering the housing (1) from the sound emitting hole (11) is attached to the back surface of the flat plate wall (10) of the housing (1). As a result, the waterproof sheet is more reliable and more reliable than the structure in which the waterproof sheet is attached to the bent wall portion (R portion).

Furthermore, since the second acoustic space (55) is formed by the sound guide wall portion (52) of the sound guide member (5) and the flat plate wall portion (10) of the housing (1), the sound guide member (5) It is possible to reduce the thickness of the housing (1) and thus the housing (1).
Furthermore, the acoustic characteristics can be adjusted by variably setting the volume of the first acoustic space (54) relative to the second acoustic space (55).

  In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim. For example, the number of sound emitting holes (11) to be opened in the housing (1) is not limited to one and may be plural.

Further, as shown in FIG. 6, the speaker housing part (63) constituting the sound source part (61) of the sound guide member (6) and the cylinder axis direction of the first acoustic space (64) are 90 degrees from the above-described embodiment. It is also possible to adopt a configuration in which the sound is guided from the first acoustic space (64) to the second acoustic space (65) of the sound guide section (62) by changing to a different direction.
According to this configuration, sound conduction by the second acoustic space (65) is realized even when the direction of the speaker in the sound guiding member (6) is 90 degrees different from the above-described embodiment.

Furthermore, as shown in FIG. 7, the above-mentioned embodiment shows the direction of the cylinder axis of the speaker housing part (73) and the first acoustic space (74) constituting the sound source part (71) of the sound guide member (7). The direction is changed to a different direction, and a pair of sound guide portions (72) and (72) are formed on both sides of the sound source portion (71), and the pair of sound guide portions (72) are formed from the first acoustic space (74). ) (72) It is also possible to adopt a configuration for guiding sound to the second acoustic space (75) (75). In this case, a pair of sound emission holes may be opened to face each of the pair of second acoustic spaces (75) and (75).
According to this configuration, even if the sound source is monaural sound, a pseudo stereo sound effect can be obtained.

(1) Housing
(10) Flat wall
(11) Sound vent
(12) Corner
(4) Speaker
(5) Sound guide member
(51) Sound generator
(52) Sound guide wall
(53) Speaker storage space
(54) First acoustic space
(55) Second acoustic space

Claims (5)

  In an electronic device in which a speaker is built in the housing and a sound emitting hole for releasing the sound emitted from the speaker to the outside of the housing is opened, the sound emitted from the speaker is placed inside the housing. A sound guide portion that leads to the sound emitting hole is formed, the sound guide portion has a flat acoustic space that extends along the wall surface of the housing, and the acoustic space has a thickness in a direction orthogonal to the wall surface of the housing. A speaker having a dimension smaller than a width dimension in a direction orthogonal to a sound guide direction of the sound guide part, and the sound emitting hole being arranged in a central part of a wall surface region of the housing facing the acoustic space. Built-in electronic equipment.   The housing has a rectangular parallelepiped shape, forms an arcuate surface with at least one corner bulging outward, the speaker is installed facing the back surface of the corner, and the flat wall extends from the corner. The electronic apparatus with a built-in speaker according to claim 1, wherein a sound hole is provided.   The sound guide member includes a sound guide member that forms the sound guide portion, and the sound guide member includes a sound source portion that houses the speaker and a sound guide wall portion that forms the acoustic space. The sound guide wall portion is installed to face the flat plate wall portion of the housing, and the acoustic space is formed by the sound guide wall portion and the flat plate wall portion, and the sound emitting hole is opened in the central portion of the flat plate wall portion. The electronic device with a built-in speaker according to claim 1 or 2.   The sound source portion of the sound guide member is formed with a speaker storage space in which a speaker is to be stored and a first acoustic space facing the speaker storage space, and the sound guide wall portion of the sound guide member and the flat plate of the housing The electronic device with a built-in speaker according to claim 3, wherein the acoustic space formed by the wall portion becomes the second acoustic space, and the sound is guided from the first acoustic space to the second acoustic space.   The electronic device with a built-in speaker according to any one of claims 2 to 4, wherein a waterproof sheet for preventing water from entering into the housing from the sound emitting hole is installed on a back surface of the flat plate wall portion of the housing.

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