WO2022208743A1

WO2022208743A1 - Speaker device and electronic device

Info

Publication number: WO2022208743A1
Application number: PCT/JP2021/013875
Authority: WO
Inventors: 裕希吉田
Original assignee: ソニーグループ株式会社
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-10-06
Also published as: JPWO2022208743A1; CN117044236A

Abstract

A speaker device according to an embodiment of the present technology is provided with a speaker unit, a case part, and a heat-dissipating part. The speaker unit has a vibration plate. The case part forms a cavity on the opposite side of the speaker unit from the vibration plate, and houses the speaker unit such that the vibration plate is exposed. The heat-dissipating part is provided to the cavity and transfers heat from the speaker unit to the case part side.

Description

speaker device and electronic equipment

The present technology relates to a speaker device and an electronic device equipped with the speaker device.

　Conventionally, various electronic devices equipped with speakers have been developed. For example, Patent Literature 1 describes a foldable communication terminal equipped with a speaker. In this communication terminal, two terminal members are connected via a hinge. One of these terminal members is provided with a speaker. A cavity is formed inside the hinge. A speaker is positioned to acoustically couple with the cavity within the hinge. As a result, the speaker resonates with the hollow portion, and the sound quality of the speaker can be improved (paragraphs [0031] [0032] [0034] FIG. 1 of Patent Document 1, etc.).

Japanese Patent Application Laid-Open No. 2007-527131

In this way, by providing a cavity to which the speaker is connected, it is possible to improve the sound quality of the speaker. On the other hand, it is also conceivable that the heat of the speaker affects the sound quality. For example, in a configuration in which the rear surface of the speaker is exposed to dissipate heat, the cavity that resonates with the speaker is arranged on the side of the speaker. In this case, the planar size of the entire speaker including the cavity is enlarged, which may cause interference with other elements.

In view of the circumstances as described above, the purpose of the present technology is to provide a speaker device and an electronic device capable of improving sound quality without increasing the planar size.

To achieve the above object, a speaker device according to one aspect of the present technology includes a speaker unit, a case portion, and a heat dissipation portion.
The speaker unit has a diaphragm.
The case part forms a cavity on the opposite side of the speaker unit to the diaphragm, and accommodates the speaker unit so that the diaphragm is exposed.
The heat dissipation portion is provided in the cavity and conducts heat of the speaker unit to the case portion side.

In this speaker device, the speaker unit is housed in the case with the diaphragm exposed. Further, the case part forms a cavity on the side opposite to the diaphragm of the speaker unit. This cavity is provided with a heat radiating portion that transfers heat from the speaker unit to the case portion side. As a result, heat can be dissipated from the speaker unit using the cavity on the side opposite to the diaphragm, and sound quality can be improved without increasing the planar size.

The speaker unit includes a voice coil that vibrates integrally with the diaphragm; a magnet that generates a magnetic field that acts on the voice coil; and a yoke that is In this case, the heat radiation portion may thermally connect the yoke and the case portion.

The heat radiating part may have at least one spring configured using a heat conducting member.

The at least one spring may be a leaf spring.

The at least one spring may include a plurality of springs arranged to evenly press the speaker unit against the case.

The case portion may further have a radiator plate provided at a position facing the speaker unit with the cavity interposed therebetween. In this case, the heat dissipation part may be connected to the heat dissipation plate.

The case portion may have a rear opening formed at a position facing the speaker unit with the cavity interposed therebetween. In this case, the radiator plate may be arranged so as to cover the rear opening of the case portion.

The speaker device may be mounted on an electronic device. In this case, the heat sink may have a connecting portion connected to the main body of the electronic device.

The connecting portion may be provided outside the case portion.

The case part may form another cavity that communicates with the cavity and spreads to the side of the speaker unit.

The case portion may have a front case that holds the speaker unit so that the diaphragm is exposed, and a rear case that is connected to the front case and forms the cavity.

The front case may have a front opening through which the diaphragm is exposed, and a sealing member provided inside the front case so as to surround the front opening. In this case, the heat radiating section may be fixed to the rear case and press the speaker unit against the sealing member.

The sealing member may be a waterproof seal.

An electronic device according to one embodiment of the present technology includes an output unit and a speaker device.
The output unit outputs an audio signal.
The speaker device includes a speaker unit that has a diaphragm, and that vibrates the diaphragm according to the audio signal. A cavity is formed on the opposite side of the speaker unit from the diaphragm, and the diaphragm is exposed. and a heat radiating portion provided in the cavity for conducting heat of the speaker unit to the case portion side.

The electronic device may further include a display for displaying images. In this case, the speaker device may be arranged such that at least a portion of the diaphragm overlaps the display when viewed from a direction perpendicular to the display.

1 is a schematic diagram showing an appearance of a terminal device equipped with a speaker device according to an embodiment of the present technology; FIG. 1 is a schematic diagram for explaining an outline of a speaker device; FIG. 2 is a plan view showing a specific configuration example of a speaker device; FIG. 4 is an exploded perspective view of the speaker device shown in FIG. 3; FIG. 4 is a cross-sectional view of the speaker device shown in FIG. 3; FIG. It is a schematic diagram which shows the cross-sectional structural example of the terminal device which mounts the speaker apparatus. FIG. 3 is a schematic diagram showing a speaker device given as a comparative example;

Hereinafter, embodiments according to the present technology will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing the appearance of a terminal device equipped with a speaker device according to an embodiment of the present technology. A terminal device 100 shown in FIG. 1 is, for example, an electronic terminal that can be carried by a user. Examples of the terminal device 100 include portable terminals such as smartphone terminals, tablet terminals, music playback devices, and electronic dictionaries. In addition, the terminal device 100 may be configured as a stationary device such as a PC (Personal Computer) or a smart speaker.
In this embodiment, the terminal device 100 is an example of an electronic device.

The terminal device 100 has a display 10 and a speaker device 30 . The terminal device 100 also includes a communication device, a storage device, a controller, a battery, a camera sensor, and the like (not shown).
The display 10 is a display device that displays images, and is provided on the front surface of the terminal device 100 . The display 10 displays an image (operation screen, video content, etc.) represented by, for example, an image signal output from the controller.
The speaker device 30 is a device that reproduces sound and is mounted inside the main body of the terminal device 100 . In FIG. 1, the speaker device 30 arranged in the terminal device 100 is schematically illustrated using a dotted line. The speaker device 30 converts, for example, an audio signal output from the controller into audio and outputs the audio. This makes it possible to reproduce various audio contents.
In this embodiment, the controller corresponds to an output unit that outputs an audio signal.

FIG. 2 is a schematic diagram for explaining the outline of the speaker device 30. As shown in FIG. The speaker device 30 has a speaker unit 31 , a speaker case 32 and a heat radiator 33 . The speaker device 30 is a box-shaped device in which a speaker unit 31 and a radiator 33 are housed inside a speaker case 32, forming a speaker box.
In the present embodiment, a closed speaker configured mainly using a closed speaker case 32 will be described. Note that the speaker device 30 may be configured as a speaker having an opening provided in the speaker case 32 .

The speaker device 30 is configured such that the diaphragm 34 provided in the speaker unit 31 is exposed from the speaker case 32 . Hereinafter, the side of the speaker case 32 where the diaphragm 34 is exposed (the upper side in the drawing) is referred to as the front side of the speaker device 30, and the side opposite to the side of the speaker case 32 where the diaphragm 34 is exposed (the upper side in the drawing). lower side) is referred to as the rear side of the speaker device 30 . FIG. 2 schematically shows a cross-sectional view of the speaker device 30 cut along the front-rear direction.

The speaker unit 31 is a unit that converts an electric signal (audio signal) into a sound wave (audio), and has the above-described diaphragm 34 and a unit main body 35 .
The diaphragm 34 is a plate-shaped member that vibrates with respect to the unit main body 35 . In the speaker unit 31, the vibrating diaphragm 34 causes the air to vibrate and generate sound waves. In this embodiment, a plate-like member is used as the diaphragm 34 .
The unit main body 35 is a structure configured as a driving mechanism that supports the diaphragm 34 and vibrates the diaphragm 34 . The unit main body 35 is provided with a voice coil connected to the diaphragm 34, a magnetic circuit (magnet and yoke) that forms a magnetic field acting on the voice coil, and the like (see FIG. 5).
For example, a voice coil provided in the unit main body 35 is driven according to the audio signal, and the diaphragm 34 vibrates together with the voice coil. Thus, the speaker unit 31 vibrates the diaphragm 34 according to the audio signal. This makes it possible to output the contents of the audio signal as audio.

As shown in FIG. 2, in this embodiment, the unit body 35 is configured to have a thin structure as a whole. The diaphragm 34 is arranged along one surface perpendicular to the thickness direction of the unit main body 35 . In the speaker unit 31, the side on which the diaphragm 34 is arranged is the front side, and the opposite side is the rear side.
Further, when viewed along the thickness direction of the unit body 35 , the planar shape of the diaphragm 34 is set so as to fit inside the planar shape of the unit body 35 . A connection area 36 connected to the speaker case 32 is formed in an area surrounding the diaphragm 34 on the front side of the unit main body 35 .

The speaker case 32 is a housing for the speaker device 30 and functions as an enclosure that accommodates the speaker case 32 . The speaker case 32 accommodates the speaker unit 31 so that the diaphragm 34 is exposed.
In this embodiment, a front opening 37 is provided on the front side of the speaker case 32 . The shape and size of the front opening 37 are set so that the diaphragm 34 and the speaker case 32 do not come into contact with each other and the unit main body 35 does not pass through. In this case, as shown in FIG. 2, the speaker unit 31 is fixed to the inner wall of the speaker case 32 so that the diaphragm 34 does not come into contact with the speaker case 32 and is exposed from the front opening 37 . Specifically, the connection area 36 formed on the front side of the unit body 35 is connected to the area inside the speaker case 32 surrounding the front opening 37 .

The speaker case 32 forms a cavity 1 on the opposite side of the speaker unit 31 from the diaphragm 34 . That is, the speaker case 32 accommodates the speaker unit 31 so that the cavity 1 is formed behind the speaker unit 31 .
Here, the cavity is a space (volumetric space) having a certain volume formed by being covered with the speaker case 32 . The speaker case 32 is configured, for example, so that the inner wall of the speaker case 32 does not come into contact with the rear side of the speaker unit 31 . Thereby, a cavity 1 is formed between the rear side of the speaker unit 31 and the inner wall of the speaker case 32 .
The cavity 1 formed on the rear side of the speaker unit 31 is hereinafter referred to as a rear cavity 1a.
In this embodiment, the speaker case 32 corresponds to a case portion.

The heat radiating section 33 is a member provided in the rear cavity 1a that transfers the heat of the speaker unit 31 to the speaker case 32 side. The heat dissipation part 33 is arranged in the rear cavity 1a, is thermally connected to the speaker unit 31, for example, and releases the heat to the speaker case 32 side. For example, the heat may be transferred directly to the speaker case 32 or may be transferred to a heat radiating member or the like arranged outside the speaker case 32 .

The heat radiating section 33 is configured using a heat conductive member such as metal that easily conducts heat. Specifically, at least one spring 38 configured using a heat-conducting member is provided as the heat radiating portion 33 . The spring 38 is arranged, for example, between the speaker unit 31 and the speaker case 32 in a contracted state so as to exert a repulsive force. As a result, the heat radiating portion 33 (spring 38) is pressed against both the speaker unit 31 and the speaker case 32, making it possible to achieve good thermal contact.

In this manner, in the speaker device 30, the sound output from the speaker unit 31 can be sufficiently resonated by providing the rear cavity 1a. As a result, it is possible to sufficiently improve the sound quality of the speaker device 30, especially the ability to reproduce bass sounds.
Further, the rear cavity 1a is the cavity 1 provided in the thickness direction of the speaker device 30. As shown in FIG. Therefore, even if the rear cavity 1a is provided, the planar size of the speaker device 30 does not increase.
Furthermore, by providing the heat dissipation portion 33 in the rear cavity 1a, it is possible to efficiently dissipate the heat of the speaker unit 31 to the speaker case 32 side, and the heat dissipation capability of the speaker device 30 is improved. As a result, for example, it is possible to increase the power that can be input to the speaker unit 31, and it is possible to improve the reproducible sound pressure level.
A more specific configuration example of the speaker device 30 will be described below.

FIG. 3 is a plan view showing a specific configuration example of the speaker device 30. As shown in FIG.
FIG. 3A is a plan view of the speaker device 30 viewed from the rear side. FIG. 3B is a plan view of the speaker device 30 attached to the terminal device 100 as seen from the rear side. 3A and 3B, the back side of the drawing is the front side of the speaker device 30 where the diaphragm 34 is exposed.
Hereinafter, the front-rear direction of the speaker device 30 is referred to as the Z direction. Also, the directions perpendicular to each other on a plane perpendicular to the Z direction are described as the X direction and the Y direction.

The X direction (horizontal direction in the drawing) corresponds to the lateral direction of the speaker device 30 . The Y direction (vertical direction in the drawing) corresponds to the vertical direction of the speaker device 30 . The left-right direction and the up-down direction of the speaker device 30 correspond to the left-right direction and the up-down direction of the terminal device 100 when mounted on the terminal device 100 . For example, the upper side in the figure is the upper side of the speaker device 30 (terminal device 100). Also, the right and left sides of the speaker device 30 viewed from the front side (the side where the diaphragm 34 is provided) are referred to as the right and left sides of the speaker device 30 (the terminal device 100).
Note that the upper side, lower side, left side, right side, front side, rear side, and the like regarding the speaker device 30 do not limit the posture, arrangement, and the like in which the speaker device 30 is used.

The speaker device 30 has the speaker unit 31, the speaker case 32, and the radiator 33, as described above. Among them, the speaker case 32 has a front case 40 provided on the front side of the speaker device 30 and a rear case 41 provided on the rear side.
FIG. 3A mainly shows the rear case 41 of the speaker case 32 .

As shown in FIG. 3A, the speaker case 32 is provided with a first area 5a, a second area 5b, and a third area 5c in order from the top. These areas are areas in which a space surrounded by both the rear case 41 and the front case 40 is formed.
The first area 5a is a substantially square area in plan view, and is an area in which the speaker unit 31, the rear cavity 1a, the heat radiating section 33, and the like are provided.

The second area 5b is an area obtained by expanding the first area 5a downward with the same horizontal width as the first area 5a. The third area 5c is narrower in the lateral direction than the second area 5a, is an area extending downward from the second area 5b, and is arranged on the right side of the figure (left side of the speaker device 30). be.
The second area 5b and the third area 5c are areas in which side cavities 1b, which will be described later, are provided (see FIG. 5).

In this embodiment, the speaker case 32 has a radiator plate 43 . Here, the radiator plate 43 is configured as part of the rear case 41 . In FIG. 3A, the radiator plate 43 fitted in the rear case 41 can be seen in the first area 5a.
Moreover, the heat sink 43 has a heat radiation terminal 44 . The heat dissipation terminal 44 is a terminal connected to the heat dissipation plate 43 . In FIG. 3A, a heat dissipation terminal 44 is formed to protrude to the left side (right side in the figure) of the speaker device 30 . The configuration of the heat sink 43 will be described later in detail.

A fixed terminal 45 and an input terminal 46 are provided on the front case 40 .
The fixed terminal 45 is a terminal for fixing the speaker device 30, for example. In FIG. 3A, a fixed terminal 45 is formed to protrude to the right side (left side in the drawing) of the speaker device 30 .
The input terminal 46 is a terminal for inputting an audio signal to be input to the speaker unit 31 . In FIG. 3A, an input terminal 46 is arranged on the lower side of the third area 5c toward the right side of the drawing.

4 is an exploded perspective view of the speaker device 30 shown in FIG. 3. FIG.
FIG. 4 shows the front case 40, the speaker unit 31, the radiator 33, and the rear case 41 in order from the bottom.
The front case 40 is provided with a front opening 37 for exposing the diaphragm 34 of the speaker unit 31 . Here, a substantially square hole is formed as the front opening 37 .

The speaker unit 31 is a substantially square thin structure in plan view, and is connected to the inner wall of the front case 40 so that the diaphragm 34 is exposed. In FIG. 4, the rear surface of the speaker unit 31 (a yoke 57 to be described later) is visible. A heat sink 33 having four springs is connected to this surface. Although FIG. 4 shows the heat radiation part 33 alone, the heat radiation part 33 is actually fixed in advance to the rear case 41 (heat radiation plate 43) (see FIG. 5).

The rear case 41 is connected to the front case 40 by pressing the heat radiation part 33 against the rear side of the speaker unit 31 . For example, the front case 40 and the rear case 41 are configured to fit together. In addition, the front case 40 and the rear case 41 may be connected using screws, an adhesive, or the like.

FIG. 5 is a cross-sectional view of speaker device 30 shown in FIG.
FIG. 5 shows a cross-sectional view of the speaker device 30 taken along line AA' shown in FIG. In FIG. 5 , the right side of the drawing corresponds to the upper side of the speaker device 30 . The upper side in the drawing is the front side of the speaker device 30, and the lower side in the drawing is the rear side of the speaker device 30. As shown in FIG.

First, the speaker unit 31 will be explained. The speaker unit 31 has a diaphragm 34 , an edge film 47 , a support portion 48 , a coupling portion 49 , a voice coil 50 and a magnetic circuit 51 .

The diaphragm 34 is a plate-shaped member. As for the plane shape of the diaphragm 34, any shape such as a circle, a square, or a rectangle can be used. When the rectangular diaphragm 34 is used, stress concentration can be avoided by rounding the corners. As the material of the diaphragm 34, for example, a resin material, a metal material, a ceramic material, or a composite member obtained by combining these materials can be used.
In addition, the shape and material of the diaphragm 34 are not limited, and the diaphragm 34 may be appropriately configured according to the application of the speaker device 30 and the like.

The edge film 47 is a film arranged between the diaphragm 34 and the support portion 48 so as to surround the outer circumference of the diaphragm 34 . The edge film 47 has, for example, a semicircular cross-sectional shape, and connects the diaphragm 34 to the supporting portion 48 so as to vibrate. A resin film or the like is typically used as the edge film 47 .
The support portion 48 is an annular member that supports the diaphragm 34 via the edge film 47 . The shape of the opening formed inside the support portion 48 is, for example, substantially the same as the planar shape of the front opening portion 37 , and the shape of the outer circumference of the support portion 48 is the planar shape of the speaker unit 31 . A front surface of the support portion 48 serves as a connection area 36 that is connected to the inner wall of the speaker case 32 (front case 40).
The coupling portion 49 is a member that couples the magnetic circuit 51 and the support portion 48 . The coupling portion 49 is, for example, annular, and couples the rear surface of the support portion 48 to a second upper plate 56b and a second magnet 55b of the magnetic circuit 51, which will be described later.

The voice coil 50 is a coil that vibrates integrally with the diaphragm 34 and causes the diaphragm 34 to vibrate according to an audio signal. Voice coil 50 may have a bobbin or may be configured as a bobbinless coil. The voice coil 50 is connected to the rear side of the diaphragm 34 and arranged to fit in an annular gap 52 formed between the first magnet 55 a and the second magnet 55 b of the magnetic circuit 51 .
The voice coil 50 is also provided with coil terminals (not shown). The coil terminals are connected to input electrodes of the speaker unit 31 .
A specific configuration of the voice coil 50 is not limited.

The magnetic circuit 51 has a first magnet 55 a , a second magnet 55 b , a first upper plate 56 a , a second upper plate 56 b and a yoke 57 .
The first magnet 55a and the second magnet 55b are magnets that generate a magnetic field acting on the voice coil. The first magnet 55 a is a plate-shaped permanent magnet arranged inside the voice coil 50 . The second magnet 55b is an annular permanent magnet arranged to surround the first magnet 55a. A plurality of permanent magnets arranged in a ring may be used as the second magnet 55b.
The first magnet 55a and the second magnet 55b are arranged with an annular gap 52 therebetween. A magnetic field generated in this gap 52 acts on the voice coil 50 .

The first upper plate 56a is a plate-shaped plate arranged in front of the first magnet 55a, and the second upper plate 56b is an annular plate arranged in front of the second magnet 55b. . For example, the coupling portion 49 described above is connected to the second upper plate 56b.
The yoke 57 is a plate-shaped member provided on the side opposite to the diaphragm 34 with the first magnet 55a and the second magnet 55b interposed therebetween, and to which the first magnet 55a and the second magnet 55b are connected. The yoke 57 is made of a metal material and magnetically couples the first magnet 55 a and the second magnet 55 b to form the magnetic circuit 51 . The rear surface of the yoke 57 is the surface of the speaker unit 31 opposite to the diaphragm 34 . Hereinafter, the rear surface of the yoke 57 may be referred to as the rear surface 58 of the speaker unit 31 .

Next, the speaker case 32 will be explained. Speaker case 32 has a front case 40 and a rear case 41 .

The front case 40 is a member (speaker case front) forming the front side of the speaker case 32 and holds the speaker unit 31 so that the diaphragm 34 is exposed.
As shown in FIGS. 4 and 5, the front case 40 is a substantially flat plate member configured to cover the first area 5a, the second area 5b, and the third area 5c. An outer peripheral portion of the front case 40 protrudes rearward to form a side wall.
The front case 40 is configured using, for example, a resin material.

The front case 40 has a front opening 37 , a seal member 60 and a fitting groove 61 .
The front opening 37 is a hole through which the diaphragm 34 is exposed. Here, a substantially square front opening is formed in the first area 5a (see FIG. 4). The planar size of the front opening 37 is set so that the diaphragm 34 and the edge film 47 surrounding the diaphragm 34 are exposed in plan view. The shape and size of the front opening 37 may be appropriately set according to the configurations of the speaker unit 31 and the diaphragm 34, for example.

The seal member 60 is a seal that connects the front case 40 and the speaker unit 31 . The seal member 60 is provided inside the front case 40 so as to surround the front opening 37 . The seal member 60 is typically an adhesive seal having adhesive surfaces on both sides. As shown in FIG. 5 , the speaker unit 31 is arranged such that the front surface (connection region 36 ) of the support portion 48 is adhered to the sealing member 60 . Thereby, the speaker unit 31 is adhesively fixed to the front case 40 .

Further, in this embodiment, a waterproof seal is used as the seal member 60 . By using a waterproof seal, it is possible to avoid intrusion of water from the front opening 37 . As the waterproof seal, a waterproof adhesive seal made of a rubber material or a resin material is appropriately used.
Note that the seal member 60 does not necessarily have to be configured as a waterproof seal, and the present technology can be applied even when a waterproof inner adhesive tape or the like is used.

The mating groove 61 is a groove into which the mating end 64 of the rear case 41 is fitted. The fitting groove 61 is formed in the end surface of the side wall of the front case 40 protruding rearward.

The rear case 41 is a member (speaker case rear) forming the rear side of the speaker case 32, and is connected to the front case 40 to form the rear cavity 1a. For example, the rear case 41 is configured such that a certain volumetric space is formed behind the speaker unit 31 . This volume space becomes the rear cavity 1a. Since the rear cavity 1a is a space arranged on the rear side of the speaker unit 31, the planar size of the speaker device 30 does not increase even if the rear cavity 1a is provided. Further, by providing the rear cavity 1a, the sound of the speaker unit 31 is resonated, and the sound quality can be improved. As a result, it is possible to realize the speaker device 30 having a very compact planar size and high sound quality.

As shown in FIGS. 4 and 5, the rear case 41 is configured to cover the first area 5a, the second area 5b, and the third area 5c. A rear cavity 1a is formed in the first area 5a. Another cavity extending to the lower side of the speaker unit 31 (left side in the figure) is formed in the second area 5b. The third area 5c is provided with a lid-like member that closes the cavity formed on the front case 40 side. An outer peripheral portion of the rear case 41 forms a side wall together with the front case 40 .

The rear case 41 has a resin housing 62 , a rear opening 63 , a mating end 64 and a heat sink 43 . The resin housing 62 and the heat sink 43 are typically integrally molded by insert molding or the like.
The resin housing 62 is a member forming a portion of the rear case 41 other than the heat sink 43, and is made of a resin material. The resin housing 62 is provided with a rear opening 63 and a mating end 64 .
The rear opening 63 is formed at a position facing the speaker unit 31 across the rear cavity 1a. In the examples shown in FIGS. 3 to 5, a rear opening 63 having approximately the same size as the speaker unit 31 is formed in the central portion of the first area 5a. A region surrounding the rear opening 63 of the resin housing 42 (rear case 41) is a region that is joined to the radiator plate 43 by insert molding.

The radiator plate 43 is a plate-like radiator member that releases heat transmitted through the radiator 33 . The radiator plate 43 is provided at a position facing the speaker unit 31 across the rear cavity 1a. It should be noted that a configuration is also possible in which the heat sink 43 is attached after the resin housing 62 is molded.

In this embodiment, the radiator plate 43 is arranged so as to cover the rear opening 63 of the speaker case 32 (the resin housing 62 of the rear case 41). That is, the radiator plate 43 functions as a lid that closes the rear opening 63 . Therefore, the rear cavity 1a becomes a voluminous space formed between the radiator plate 43 and the speaker unit 31. As shown in FIG. Thus, the radiator plate 43 is configured as part of the speaker case 32 (rear case 41).

As shown in FIG. 5 , the radiator plate 43 has a substantially flat plate shape and has a mounting portion 66 and a coupling end 67 .
The mounting portion 66 is a projection provided for mounting the heat radiating portion 33 . As shown in FIGS. 3 and 5 , the mounting portion 66 is configured by deforming the heat sink 43 so as to protrude forward (inward) from the heat sink 43 . Two protrusions are formed as the mounting portions 66 on the heat sink 43 . In addition, when viewed from the rear side (outside) of the heat sink 43, the mounting portion 66 has a concave shape.
The joint end 67 is formed by bending the outer peripheral end of the heat sink 43 forward. The coupling end 67 is coupled to the area surrounding the rear opening 63 of the resin housing 62 . This makes it possible to improve the engagement between the resin housing 62 and the heat sink 43 .

Further, as described with reference to FIG. 3A, the heat sink 43 has heat sink terminals 44 .
The heat dissipation terminal 44 is a terminal connected to the main body of the terminal device 100 on which the speaker device 30 is mounted. As shown in FIG. 3A, the heat dissipation terminal 44 is formed with holes for screwing. The heat dissipation terminal 44 is integrally formed with the heat dissipation plate 43 , for example, so as to pass through the inside of the rear case 41 , penetrate the side wall, and protrude from the side surface of the rear case 41 . Thus, the heat dissipation terminal 44 is provided outside the rear case 41 (speaker case 32).
In this embodiment, the heat dissipation terminal 44 corresponds to a connecting portion connected to the main body of the electronic device.

FIG. 3B shows how the heat dissipation terminal 44 is connected to the main body of the terminal device 100 . By providing the heat dissipation terminal 44 outside the speaker case 32, it is possible to easily realize the connection with the terminal device 100. FIG.
Note that the heat dissipation terminal 44 may be provided inside the speaker case 32 or on the outer wall thereof. For example, as a heat dissipation terminal, a through hole for screwing may be formed in a portion covering the rear opening 63 of the heat dissipation plate 43 . Further, heat radiation terminals 44 and the like may be formed along the side wall of speaker case 32 .

As shown in FIG. 5, the speaker case 32 is formed with another cavity 1 that communicates with the rear cavity 1a. Here, the side wall of the rear case 41 protrudes into the second area 5b below the first area 5a (on the left side in the figure) where the rear cavity 1a is formed, thereby forming the cavity 1. As shown in FIG. Furthermore, in the third area 5c below the second area 5b (on the left side in the drawing), a cavity 1 is formed by a groove-shaped area formed inside the front case 40. As shown in FIG.
When viewed from the speaker unit 31, these cavities 1 are lateral cavities 1b extending from the rear cavities 1a not in the front-back direction (thickness direction) but in the plane direction perpendicular to the front-back direction (sides of the speaker unit 31). becomes.

In this manner, the speaker case 32 forms a side cavity 1b that communicates with the rear cavity 1a and spreads to the side of the speaker unit 31. As shown in FIG. By providing the side cavity 1b, it is possible to increase the volume of the cavity portion of the speaker device 30 configured as a speaker box. As a result, it is possible to sufficiently improve the reproduction capability of bass and the like. The size and arrangement of the side cavity 1b are not limited.
In this embodiment. The side cavity 1b corresponds to another cavity.

Next, the heat radiating portion 33 will be described.
The radiator 33 thermally connects the yoke 57 of the speaker unit 31 and the speaker case 32 . As a result, for example, heat generated in the voice coil 50 and transferred to the yoke 57 can be released to the speaker case 32 side.
In this embodiment, the heat dissipation part 33 is connected to a heat dissipation plate 43 provided on the rear case 41 . As shown in FIG. 5 , the heat dissipation portion 33 is configured to contact the rear surface 58 of the yoke 57 and the front (inner) surface of the heat dissipation plate 43 . As a result, the heat transmitted through the heat radiating portion 33 is transmitted to the heat radiating plate 43, and the heat of the speaker unit 31 can be efficiently released.

The heat radiating portion 33 has a plurality of leaf spring portions 70 and a base portion 71 .
The leaf spring portion 70 is a leaf spring formed by bending a plate-shaped heat-conducting member. The base portion 71 is a member that supports the plurality of leaf spring portions 70 . The plate spring portion 70 and the base portion 71 are typically integrally formed by bending one member. As the leaf spring portion 70 and the base portion 71, for example, a high thermal conductivity member having spring properties such as phosphor bronze or Corson alloy is used. In addition, the heat radiating portion 33 may be made of a stainless-based or iron-based alloy or the like.

The leaf spring portion 70 is constructed by bending a long plate extending in one direction from the base portion 71 in the opposite direction at a bending portion 72 provided near the middle thereof. Also, the root portion connecting the long plate to the base portion 71 is bent in the same direction as the bent portion 72 at an angle smaller than that of the bent portion 72 . As a result, the long plate becomes a plate spring that is bent at two points, the root portion and the bent portion 72 . A curved portion 73 that contacts the back surface 58 of the yoke 57 is formed at the tip of the leaf spring portion 70 .
The natural length of the leaf spring portion 70 (the distance from the base portion 71 to the curved portion 73 as viewed from the base portion 71) is the size of the rear cavity 1a in the front-rear direction, that is, from the rear surface 58 of the yoke 57 to the front (inner) surface of the heat sink 43. is set longer than the distance of

As shown in FIG. 4, the base portion 71 is a longitudinal member extending in one direction, to which a plurality of plate spring portions 70 are connected respectively. Specifically, four plate spring portions 70 are connected to the base portion 71 in line symmetry with respect to the longitudinal direction. For example, two pairs of leaf spring portions 70 are arranged along the longitudinal direction of the base portion 71 . The pair of leaf spring portions 70 is formed by bending a pair of long plates extending in mutually opposite directions perpendicular to the longitudinal direction of the base portion 71 . Further, the base of each plate spring portion 70 is bent so that each curved portion 73 is arranged at a constant interval.
The base portion 71 also has a mounting hole 74 into which the mounting portion 66 of the heat sink 43 is inserted. In the example shown in FIG. 4, two mounting holes 74 are formed in accordance with the positions where the pairs of leaf spring portions 70 are connected. Mounting portions 66 are provided on the radiator plate 43 so as to be insertable into these mounting holes 74 .

The heat radiating portion 33 is fixed to the heat radiating plate 43 by inserting the mounting hole 74 into the mounting portion 66 of the heat radiating plate 43 . As a method for fixing the heat radiating portion 33, for example, welding, crimping, or the like is used. As a result, the heat dissipation portion 33 and the heat dissipation plate 43 can be brought into good thermal contact with each other, and the heat dissipation efficiency can be sufficiently improved. In addition, screwing or the like may be used as a method for fixing the heat radiating portion 33 .

When the rear case 41 is fitted into the front case 40, the heat radiating portion 33 fixed to the heat radiating plate 43 contacts the rear surface 58 of the yoke 57, and the leaf spring portion 70 is contracted to the size of the rear cavity 1a. Therefore, the restoring force of the plate spring portion 70 acts on the rear surface 58 of the yoke 57 in the direction of pushing it forward. As a result, the speaker unit 31 is pressed against the seal member 60 provided on the inner wall of the front case 40 .
In this manner, the heat dissipation portion 33 is fixed to the rear case 41 (heat dissipation plate 43 ) and presses the speaker unit 31 against the sealing member 60 .

This makes it possible to strengthen the connection between the speaker unit 31 and the front case 40, for example. Further, by pressing the speaker case 32 with the leaf spring portion 70, it is possible to greatly suppress unnecessary vibrations or the like generated in the speaker case 32 in accordance with the vibration of the diaphragm 34. FIG. Thereby, the sound quality of the speaker device 30 can be improved.
In addition, since energy consumption due to unnecessary vibration is eliminated, it is possible to realize the speaker device 30 with good energy efficiency.
Furthermore, in a waterproof speaker in which the sealing member 60 is configured as a waterproof seal, pressure from the rear surface 58 improves the adhesion of the waterproof seal, making it possible to reduce waterproof failures.

Further, as described above, the heat radiation portion 33 is provided with a plurality of leaf spring portions 70 arranged line-symmetrically. The position of the mounting portion 66 of the heat sink 43 is such that, for example, the midpoint between the two mounting holes 74 of the heat sink 33 (that is, the center point of the four leaf spring portions 70) is the central axis of the voice coil of the speaker unit 31. is set to match This makes it possible to evenly press the speaker unit 31 against the front case 40 (sealing member 60).
In this manner, the plurality of plate spring portions 70 are arranged so as to evenly press the speaker unit 31 against the speaker case 32 (front case 40).

This makes it possible to avoid a situation in which the force applied from the speaker unit 31 to the sealing member 60 is biased. As a result, the connection between the speaker unit 31 and the front case 40 can be uniformly strengthened over the entire circumference of the speaker unit 31 .
In particular, in a waterproof speaker, it is possible to uniformly improve the adhesion of the waterproof seal, and it is possible to exhibit high waterproof performance.

Here, the flow of heat generated in the speaker unit 31 will be described with reference to FIGS. 5 and 3B. 5 and 3B schematically illustrate heat flow using black arrows.
In the speaker unit 31, for example, the voice coil 50 is the main heat source. The heat generated by the voice coil 50 propagates through the gap 52 to the first magnet 55a and the second magnet 55b. Heat from each magnet propagates to the yoke 57 .

A leaf spring portion 70 of the heat dissipation portion 33 is connected to the back surface of the yoke 57 . The heat of the yoke 57 propagates from the tip (curved portion 73 ) of the leaf spring portion 70 to the leaf spring portion 70 and then to the base portion 71 . The base portion 71 is connected to the heat sink 43 , and the heat of the base portion 71 propagates to the heat sink 43 . As described above, in the present embodiment, although the back surface 58 side of the yoke 57 is hollow (rear cavity 1), by providing the heat dissipation portion 33, the heat of the speaker unit 31 is absorbed from the back surface 58 side of the yoke 57. It is possible.

The heat propagated to the heat sink 43 propagates from the heat dissipation terminal 44 to the main body of the terminal device 100 as shown in FIG. 3B. As a result, the heat of the speaker unit 31 can be released to the housing of the terminal device 100 having a relatively large heat capacity.
By providing the heat dissipation portion 33 and the heat dissipation plate 43 in this manner, the substantial heat capacity and heat dissipation area of the speaker unit 31 are greatly increased. As a result, the cooling efficiency of the speaker unit 31 is sufficiently improved, and it becomes possible to cope with large-current audio signals. As a result, the sound pressure level and dynamic range can be increased, and the sound quality of the speaker device 30 can be sufficiently improved.

FIG. 6 is a schematic diagram showing a cross-sectional configuration example of the terminal device 100 in which the speaker device 30 is mounted. Here, the speaker device 30 is mounted on the terminal device 100 so that the vertical direction and the horizontal direction of the speaker device 30 correspond to the vertical direction and the horizontal direction of the terminal device 100 .
FIG. 6 schematically shows a cross-sectional view of the terminal device 100 cut along the XZ plane. The right side in the drawing is the upper side of the terminal device 100 (speaker device 30). The upper side in the figure is the front side of the terminal device 100 (speaker device 30).

The terminal device 100 has a display 10 , a main housing 11 , a front glass 12 and a rear cover 13 .
The main housing 11 is a frame member of the terminal device 100 that supports the speaker device 30 and the display 10 . In the example shown in FIG. 6, the main body housing 11 includes a plate-shaped inner frame 14 extending along the vertical direction of the terminal device 100 and an upper end frame 15 provided on the upper side of the terminal device 100 and connected to the inner frame 14 . is schematically illustrated.

The inner frame 14 is provided with a frame opening 16 having substantially the same shape as the front opening 37 of the speaker device 30 . The speaker device 30 is connected to the rear side of the inner frame 14 via the seal member 17 so that the frame opening 16 and the front opening 37 overlap in plan view. The seal member 17 is an annular adhesive seal configured to cover the entire circumference of the frame opening 16 . A waterproof seal, for example, is used as the seal member 17 .

The display 10 is arranged on the front surface of the inner frame 14 . A front glass 12 is arranged on the front surface of the display 10 .
The front glass 12 functions as a touch surface on which a user performs touch operations and the like.
The rear cover 13 is a plate-like member arranged to cover the rear side of the terminal device 100 .
The rear cover 13 may be in contact with, for example, the rear surface of the speaker device 30 (radiator plate 43). Alternatively, another element or member may be provided between the rear cover 13 and the speaker device 30 . As the back cover 13, for example, a cover (back glass) made of a glass member is used. In addition, the back cover 13 may be configured using a resin member or a metal member.

In the cross section shown in FIG. 6, the display 10 is configured such that the upper (right side in the drawing) edge of the display 10 does not reach the inner frame 14 on the upper end frame 15 side. An opening window 20 is formed between the upper end (right side in the drawing) of the front glass 12 and the upper end frame 15 . As a result, a space communicating with the frame opening 16 is formed from the upper edge of the display 10 to the opening window 20 .

For example, the sound 3 (white arrow in the figure) output from the speaker device 30 (diaphragm 34) passes through the front opening 37 of the speaker device 30 and the frame opening 16 of the internal frame 14 to the display 10. is output from the opening window 20 through the space formed above. This makes it possible to output the sound of the speaker device 30 to the outside of the terminal device 100 .
Note that the area where the opening window 20 and the like are provided may be configured using a cutout (notch) or the like formed on the upper side of the display 10, for example.

Thus, in the terminal device 100 , the speaker device 30 is arranged so that at least a portion of the diaphragm 34 overlaps the display 10 when viewed from the direction (Z direction) perpendicular to the display 10 . Accordingly, since the speaker device 30 is arranged on the back side of the display 10, it is possible to easily realize the terminal device 100 or the like with a thin bezel.

As described above, since the speaker device 30 is provided with the rear cavity 1a, the thickness of the speaker device 30 is larger than the thickness of the speaker unit 31 alone. On the other hand, the heat radiating portion 33 such as a plate spring provided in the rear cavity 1a has a sufficiently small volume and does not occupy the rear cavity 1a. Therefore, even if the thickness of the rear cavity 1a is set thin, it is possible to secure a sufficient volumetric space.
In this way, by using the present technology, it is possible to provide the speaker device 30 that has a thickness that allows it to be arranged on the back surface of the display 10, has a sufficiently compact planar size, and has good sound quality.

As described above, in the speaker device 30 according to the present embodiment, the speaker unit 31 is accommodated in the speaker case 32 with the diaphragm 34 exposed. Further, the speaker case 32 forms a rear cavity 1a on the side opposite to the diaphragm 34 of the speaker unit 31 . A radiator 33 for transmitting heat from the speaker unit 31 to the speaker case 32 is provided in the rear cavity 1a. As a result, heat can be dissipated from the speaker unit 31 using the rear cavity 1a on the side opposite to the diaphragm 34, and sound quality can be improved without increasing the planar size.

FIG. 7 is a schematic diagram showing a speaker device given as a comparative example.
FIG. 7A is a plan view of the speaker device 150 viewed from the rear side. 7B is a cross-sectional view of the speaker device 150 taken along line BB' shown in FIG. 7A.
In the speaker device 150, the speaker case 152 is configured such that the rear side of the speaker unit 151 (back surface of the yoke) is exposed. A graphite sheet 153 for heat dissipation is attached to the rear side of the speaker unit 151 .

In this manner, with the configuration in which the rear side of the speaker unit 151 is exposed, it is not possible to increase the volume of the box in the thickness direction (front-rear direction). Therefore, as shown in FIG. 7B, it is necessary to widen the cavity 1 laterally (in the vertical direction and the horizontal direction) of the speaker unit 151 to secure the volume. As a result, the planar size of the speaker device 150 is increased, which may reduce the degree of freedom in device layout. In addition, it is necessary to seal the speaker unit 151 with an adhesive or the like, which may complicate the manufacturing process. Furthermore, the graphite sheet 153 is required only for heat dissipation, which may increase the device cost.
Also, a method of arranging a metal plate or the like on the side of the speaker unit 151 on which the diaphragm 154 is provided to dissipate heat through the air is also conceivable. However, since this method uses air as a medium, it is considered that the cooling efficiency is low compared to the method of releasing the heat of the speaker unit 151 directly.

In the speaker device 30 according to this embodiment, the rear cavity 1a is formed on the side of the speaker unit 31 opposite to the diaphragm 34 . Further, the heat of the speaker unit 31 is transmitted to the speaker case 32 side by the heat radiation portion 33 provided in the rear cavity 1a. As a result, the heat dissipation capability is improved, so the input power that can be input to the voice coil 50 is improved. As a result, the sound pressure level, dynamic range, etc. of the speaker device 30 can be sufficiently improved.

In addition, since the speaker device 30 does not need to expose the rear side of the speaker unit 31 (the back surface 58 of the yoke 57), it is possible to secure a volume in the thickness direction. As a result, it is possible to realize a device that has a high reproduction capability for low tones and the like and that has a compact planar size. In addition, it is possible to improve the degree of freedom in device layout.

A spring member such as a leaf spring is used as the heat radiating portion 33 . In this case, the space occupied by the heat radiating portion 33 is very small, and it is possible to minimize the effect (volume effect) on the sound quality due to the reduction in the volume of the rear cavity 1a.
By pressing the speaker unit 31 with a spring, the vibration of the speaker unit 31 can be reduced and the sound quality can be improved. Moreover, in the case of a waterproof speaker, pressure from the back improves the adhesion of the waterproof double-sided tape, making it possible to reduce waterproof defects and improve waterproof performance.

Also, as shown in FIG. 5 and the like, the yoke 57 is an independent metal within the closed container. In this embodiment, the metal heat dissipation portion 33 is connected to such a yoke 57 . As a result, even when static electricity or the like is generated, a high potential can be released to GND, and ESD (Electrostatic Discharge) performance can be improved.

<Other embodiments>
The present technology is not limited to the embodiments described above, and various other embodiments can be implemented.

In the above description, a thin speaker unit having a flat diaphragm has been described. The shape of the diaphragm and the shape of the speaker unit are not limited.
For example, a dome-shaped, cone-shaped, or horn-shaped diaphragm may be used. Further, the planar shape of the diaphragm may be set to any shape such as round, elliptical, or rectangular. Also, the speaker unit does not necessarily have to be thin, and for example, a speaker unit that matches the type of speaker may be used.

Moreover, in the above description, an example in which a leaf spring is mainly used as the heat radiation portion has been described. For example, a coil spring or the like may be provided instead of the leaf spring. Further, the number of springs used as the heat radiation part is not limited, and for example, the heat radiation part may be configured using a single spring.
In addition, the configuration of the heat radiating section is not limited, and any thermally conductive member may be used. For example, a metal wire, a conductive sheet, or the like may be used to connect the speaker unit and the case via the rear cavity. Also, a conductive sponge or the like may be used as the heat radiating portion.

Also, although the heat sink is configured as part of the speaker case (rear case), the heat sink may be provided as an independent member, for example. In this case, for example, it is possible to construct a rear case that is not open on the rear side and arrange a heat sink inside the rear case. Alternatively, a configuration is also possible in which the heat radiating section is connected to a heat radiating plate arranged outside the rear case through a hole opened in the rear case.

It is also possible to combine at least two characteristic portions among the characteristic portions according to the present technology described above. That is, various characteristic portions described in each embodiment may be combined arbitrarily without distinguishing between each embodiment. Moreover, the various effects described above are only examples and are not limited, and other effects may be exhibited.

In the present disclosure, "same", "equal", "orthogonal", etc. are concepts including "substantially the same", "substantially equal", "substantially orthogonal", and the like. For example, states included in a predetermined range (for example, a range of ±10%) based on "exactly the same", "exactly equal", "perfectly orthogonal", etc. are also included.

Note that the present technology can also adopt the following configuration.
(1) a speaker unit having a diaphragm;
a case portion that forms a cavity on the opposite side of the speaker unit to the diaphragm and houses the speaker unit so that the diaphragm is exposed;
A speaker device, comprising: a heat radiating section provided in the cavity for transferring heat of the speaker unit to the case section side.
(2) The speaker device according to (1),
The speaker unit includes a voice coil that vibrates integrally with the diaphragm; a magnet that generates a magnetic field that acts on the voice coil; and a yoke that is
The speaker device, wherein the radiator thermally connects the yoke and the case.
(3) The speaker device according to (1) or (2),
The speaker device, wherein the heat radiating section has at least one spring configured using a heat conducting member.
(4) The speaker device according to (3),
The speaker device, wherein the at least one spring is a leaf spring.
(5) The speaker device according to (3) or (4),
The speaker device, wherein the at least one spring includes a plurality of springs arranged to evenly press the speaker unit against the case.
(6) The speaker device according to any one of (1) to (5),
the case further includes a radiator plate provided at a position facing the speaker unit with the cavity interposed therebetween;
The speaker device, wherein the radiator is connected to the radiator plate.
(7) The speaker device according to (6),
The case portion has a rear opening formed at a position facing the speaker unit with the cavity interposed therebetween,
The speaker device, wherein the radiator plate is arranged to cover the rear opening of the case.
(8) The speaker device according to (6) or (7),
The speaker device is mounted on an electronic device,
The speaker device, wherein the radiator plate has a connecting portion connected to the main body of the electronic device.
(9) The speaker device according to (8),
The speaker device, wherein the connecting portion is provided outside the case portion.
(10) The speaker device according to any one of (1) to (9),
The case part forms another cavity communicating with the cavity and extending laterally of the speaker unit.
(11) The speaker device according to any one of (1) to (10),
A speaker device, wherein the case portion includes a front case that holds the speaker unit so that the diaphragm is exposed, and a rear case that is connected to the front case and forms the cavity.
(12) The speaker device according to (11),
The front case has a front opening that exposes the diaphragm, and a seal member provided inside the front case so as to surround the front opening,
The speaker device, wherein the heat radiating section is fixed to the rear case and presses the speaker unit against the seal member.
(13) The speaker device according to (12),
The speaker device, wherein the seal member is a waterproof seal.
(14) an output unit that outputs an audio signal; and a speaker unit that has a diaphragm and vibrates the diaphragm according to the audio signal;
a case portion that forms a cavity on the opposite side of the speaker unit to the diaphragm and houses the speaker unit so that the diaphragm is exposed;
a speaker device comprising: a heat radiating section provided in the cavity for conducting heat of the speaker unit to the case section;
An electronic device comprising
(15) The electronic device according to (14), further comprising:
Equipped with a display for displaying an image,
The speaker device is an electronic device arranged so that at least part of the diaphragm overlaps with the display when viewed from a direction perpendicular to the display.

REFERENCE SIGNS LIST 1 cavity 1a rear cavity 1b side cavity 3 sound 10 display 30 speaker device 31 speaker unit 32 speaker case 33 radiator 34 diaphragm 37 front opening 40 front case 41 rear DESCRIPTION OF SYMBOLS Case 43... Heat sink 44... Heat sink terminal 60... Sealing member 63... Rear opening 70... Plate spring part 100... Terminal device

Claims

a speaker unit having a diaphragm;
a case portion that forms a cavity on the opposite side of the speaker unit to the diaphragm and houses the speaker unit so that the diaphragm is exposed;
A speaker device, comprising: a heat radiating section provided in the cavity for transferring heat of the speaker unit to the case section side.
The speaker device according to claim 1,
The speaker unit includes a voice coil that vibrates integrally with the diaphragm; a magnet that generates a magnetic field that acts on the voice coil; and a yoke that is
The speaker device, wherein the radiator thermally connects the yoke and the case.
The speaker device according to claim 1,
The speaker device, wherein the heat radiating section has at least one spring configured using a heat conducting member.
The speaker device according to claim 2,
The speaker device, wherein the at least one spring is a leaf spring.
The speaker device according to claim 2,
The speaker device, wherein the at least one spring includes a plurality of springs arranged to evenly press the speaker unit against the case.
The speaker device according to claim 1,
the case further includes a radiator plate provided at a position facing the speaker unit with the cavity interposed therebetween;
The speaker device, wherein the radiator is connected to the radiator plate.
The speaker device according to claim 6,
The case portion has a rear opening formed at a position facing the speaker unit with the cavity interposed therebetween,
The speaker device, wherein the radiator plate is arranged to cover the rear opening of the case.
The speaker device according to claim 6,
The speaker device is mounted on an electronic device,
The speaker device, wherein the radiator plate has a connecting portion connected to the main body of the electronic device.
The speaker device according to claim 8,
The speaker device, wherein the connecting portion is provided outside the case portion.
The speaker device according to claim 1,
The case part forms another cavity communicating with the cavity and extending laterally of the speaker unit.
The speaker device according to claim 1,
A speaker device, wherein the case portion includes a front case that holds the speaker unit so that the diaphragm is exposed, and a rear case that is connected to the front case and forms the cavity.
The speaker device according to claim 11,
The front case has a front opening that exposes the diaphragm, and a seal member provided inside the front case so as to surround the front opening,
The speaker device, wherein the heat radiating section is fixed to the rear case and presses the speaker unit against the seal member.
13. The speaker device according to claim 12,
The speaker device, wherein the seal member is a waterproof seal.
an output unit that outputs an audio signal; and a speaker unit that has a diaphragm and vibrates the diaphragm according to the audio signal;
a case portion that forms a cavity on the opposite side of the speaker unit to the diaphragm and houses the speaker unit so that the diaphragm is exposed;
An electronic device comprising: a speaker device comprising: a radiator provided in the cavity for conducting heat of the speaker unit to the case side.
15. The electronic device of claim 14, further comprising:
Equipped with a display for displaying an image,
The speaker device is an electronic device arranged so that at least part of the diaphragm overlaps with the display when viewed from a direction perpendicular to the display.