Electronic device

Abstract

To sufficiently reduce solid propagation sound transmitted from a cabinet to a microphone element.SOLUTION: A first gasket (24) having a first acoustic path (24c) is provided on a microphone substrate (22) provided inside a cabinet (12) so as to cover a microphone element (18). The first gasket (24) is configured in non-contact with the cabinet (12), and a second gasket (28) having a second acoustic path (28c) is provided inside the cabinet (12) so as to face the first gasket (24). An endless rib (34) is provided between a facing surface (24f) of the first gasket (24) and a facing surface (28f) of the second gasket (28) so as to surround opening portions of the first acoustic path (24c) and the second acoustic path (28c).SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an electronic device incorporating a microphone element for collecting sound.

Background Art

[0002] In order to perform a call by an electronic device or voice operation of an electronic device, etc., a microphone element may be incorporated in the electronic device. In the electronic device shown in Patent Document 1, a microphone mounting structure for mounting a microphone element (a microphone in Patent Document 1) inside a cabinet (a housing in Patent Document 1) of the electronic device is provided, and the configuration of the microphone mounting structure is as follows.

[0003] A sound hole (a sound passage hole in Patent Document 1) for introducing sound is formed in the cabinet. Inside the cabinet, a microphone substrate (a circuit board in Patent Document 1) is provided, and a microphone element (a microphone in Patent Document 1) is mounted on the microphone substrate. An annular sound insulation wall surrounding the microphone element is provided inside the cabinet. A buffer portion for damping vibration from the panel of the electronic device is provided inside the cabinet.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in the electronic device described in Patent Document 1, although vibrations from the panel can be suppressed by the buffer portion, for example, when an object such as hair contacts the cabinet, vibrations transmitted from the cabinet to the microphone element cannot be suppressed. Therefore, in the above-described case, the structure-borne sound transmitted from the cabinet to the microphone element cannot be sufficiently reduced, and there is a problem that the sound quality of the sound collected by the microphone element deteriorates.

[0006] Therefore, an aspect of the present invention aims to sufficiently reduce structure-borne sound transmitted from a cabinet to a microphone element and suppress a deterioration in the sound quality of sound collected by the microphone element even when an object contacts the cabinet.

Means for Solving the Problems

[0007] In order to solve the above problems, an electronic device according to an aspect of the present invention includes a cabinet in which a sound hole for introducing sound is formed, a microphone substrate provided inside the cabinet and on which a microphone element for collecting sound is mounted, a first gasket provided on the microphone substrate so as to cover the microphone element, configured to be non-contact with the cabinet, and having a first acoustic path communicating with a microphone hole of the microphone element, a second gasket provided inside the cabinet so as to face the first gasket, and having a second acoustic path connecting the sound hole of the cabinet and the first acoustic path of the first gasket, and an endless member provided between the opposing surfaces of the first gasket and the opposing surface of the second gasket so as to surround openings of the first acoustic path and the second acoustic path.

Effects of the Invention

[0008] According to an aspect of the present invention, even when an object contacts the cabinet, structure-borne sound transmitted from the cabinet to the microphone element can be sufficiently reduced, and a deterioration in the sound quality of sound collected by the microphone element can be suppressed.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention and modifications thereof will be described with reference to the drawings.

[0011] 〔Embodiment 1〕 Embodiment 1 will be described with reference to FIGS. 1 to 5. FIG. 1 is a schematic perspective view of a wearable speaker device of a head-mounted type. FIG. 2 is a schematic cross-sectional view of a microphone mounting structure according to Embodiment 1. FIG. 3 is a partially exploded perspective view of the microphone mounting structure shown in FIG. 2. FIG. 4 is a partially exploded perspective view of the microphone mounting structure shown in FIG. 2.

[0012] (Overall configuration of wearable speaker device 10) As shown in FIGS. 1 and 2, the wearable speaker device 10 according to the present embodiment is an electronic device that can be used while being worn around the user's neck, and outputs audio transmitted from an external device such as a television receiver or a smartphone. The wearable speaker device 10 can be used for input and output of audio in a voice call using a smartphone as an external device.

[0013] The wearable speaker device 10 includes an inverted U-shaped cabinet 12, and the cabinet 12 can be worn around the neck. The cabinet 12 has a pair of arm portions 12a and a connecting portion 12b that connects the base end portions of the pair of arm portions 12a. Each arm portion 12a of the cabinet 12 is made of, for example, resin or the like. The connecting portion 12b of the cabinet 12 is elastically deformable and is made of, for example, an elastomer material.

[0014] Inside the base end portion side of each arm portion 12a of the cabinet 12, a speaker 14 that outputs audio is provided. At the base end portion of each arm portion 12a of the cabinet 12, a sound emitting portion 16 for emitting the audio output from the speaker 14 is provided, and each sound emitting portion 16 has a plurality of sound emitting holes. Inside the tip portion of one arm portion 12a of the cabinet 12, a microphone element 18 that collects audio is provided.

[0015] Inside the cabinet 12, a communication unit (not shown) that performs wireless communication with an external device such as a television receiver, an audio playback device, and a smartphone is provided. The communication unit is composed of an antenna, a communication module, and the like. As the communication method of the communication unit, for example, a frequency band of 422 MHz band or 440 MHz band is used. When performing wireless communication with an external device via a repeater (not shown), as the communication method of the communication unit, for example, a frequency band of 440 MHz band such as Bluetooth (registered trademark) is used.

[0016] Inside the cabinet 12, there is a control unit (not shown) that comprehensively controls the speaker 14, the microphone element 18, and the communication unit. The control unit is composed of a microcomputer. The control unit amplifies the electrical signal acquired from the communication unit and outputs it to the speaker 14. The control unit converts the sound acquired from the microphone element 18 into an electrical signal and outputs it to the communication unit.

[0017] (Microphone mounting structure 20) As shown in FIG. 2, the wearable speaker device 10 includes a microphone mounting structure 20 for mounting the microphone element 18 inside the tip side of one arm portion 12a of the cabinet 12. The specific details of the microphone mounting structure 20 according to Embodiment 1 are as follows.

[0018] As shown in FIGS. 2 to 4, a sound hole 12h for introducing sound is formed to penetrate the tip side of one arm portion 12a of the cabinet 12, and the cross section of the sound hole 12h is formed in a circular shape. Also, inside the tip side of one arm portion 12a of the cabinet 12, a microphone substrate 22 for controlling the microphone element 18 is provided via a substrate holder (not shown), and the microphone substrate 22 is disposed in the vicinity of the sound hole 12h of the cabinet 12. The microphone substrate 22 is configured to be non-contact with the inner wall surface 12f of the cabinet 12. A rectangular microphone element 18 is mounted on the microphone substrate 22, and a circular microphone hole (sound collecting hole) 18h for collecting sound is formed in the microphone element 18.

[0019] A first gasket 24 is provided on the microphone substrate 22 so as to cover the microphone element 18, and the first gasket 24 is fixed to the microphone substrate 22 by a double-sided tape 26. The first gasket 24 is elastically deformable and is made of, for example, rubber, rubber containing glass fibers, or fluororesin. The first gasket 24 is configured to be non-contact with the inner wall surface 12f of the cabinet 12 and has a rectangular fitting recess 24d that can be fitted to the microphone element 18. A long-hole-shaped first acoustic path 24c communicating with the microphone hole 18h of the microphone element 18 penetrates through the first gasket 24, and the first acoustic path 24c communicates with the fitting recess 24d. By forming the first acoustic path 24c of the first gasket 24 in a long-hole shape, when the fitting recess 24d of the first gasket 24 is fitted to the microphone element 18, the first acoustic path 24c of the first gasket 24 is configured to be aligned with the microphone hole 18h of the microphone element 18.

[0020] Inside the tip end side of one arm portion 12a in the cabinet 12, a second gasket 28 is provided facing the first gasket 24. The second gasket 28 is surrounded by a partition wall 30 formed on the inner wall surface 12f of the cabinet 12. The second gasket 28 is supported by a plurality of support ribs 32 formed on the inner wall surface 12f of the cabinet 12. The second gasket 28 is elastically deformable and is made of, for example, rubber, rubber containing glass fibers, or fluororesin.

[0021] The second gasket 28 is formed with a second acoustic path 28c penetrating therethrough to connect the sound hole 12h of the cabinet 12 and the first acoustic path 24c of the first gasket 24. One end of the second acoustic path 28c of the second gasket 28 communicates with the sound hole 12h of the cabinet 12, and the other end of the second acoustic path 28c of the second gasket 28 communicates with the first acoustic path 24c of the first gasket 24. The cross-sectional shape of the side of the second acoustic path 28c of the second gasket 28 is formed in an L shape. The opening on one end side of the second acoustic path 28c of the second gasket 28 is formed in a circular shape, and the opening on the other end side of the second acoustic path 28c of the second gasket 28 is formed in a rectangular shape. Note that the opening on the other end side of the second acoustic path 28c of the second gasket 28 may be formed in a circular shape.

[0022] On the opposing surface 28f of the second gasket 28, an endless rib 34 in a rectangular frame shape is formed so as to surround the opening on the other end side of the second acoustic path 28c. The endless rib 34 surrounds the opening of the first acoustic path 24c on the opposing surface 24f of the first gasket 24. In other words, between the opposing surface 24f of the first gasket 24 and the opposing surface 28f of the second gasket 28, the endless rib 34 as an endless member is provided so as to surround the openings of the first acoustic path 24c and the second acoustic path 28c. The endless rib 34 is pressed against the peripheral edge of the opening of the first acoustic path 24c on the opposing surface 24f of the first gasket 24, and a part of the endless rib 34 is in a crushed state due to the pressing. In FIG. 2, the state before a part of the endless rib 34 is crushed is shown by a two-dot chain line. Note that the opposing surface 28f of the second gasket 28 refers to the surface of the second gasket 28 that faces the first gasket 24. The opposing surface 24f of the first gasket 24 refers to the surface of the first gasket 24 that faces the second gasket 28. Instead of forming the endless rib 34 in a rectangular frame shape, it may be formed in an annular shape, a polygonal frame shape other than a rectangular frame shape, or may have irregularities formed thereon.

[0023] As shown in FIG. 2, the opening width of the endless rib 34 is set to be substantially the same as the opening width on the other end side of the second acoustic path 28c of the second gasket 28. The inner peripheral surface of the endless rib 34 is smoothly connected to the inner peripheral surface of the second acoustic path 28c of the second gasket 28. Thereby, an extra step generated between the second acoustic path 28c of the second gasket 28 and the first acoustic path 24c of the first gasket 24 can be reduced.

[0024] Note that the opening width of the endless rib 34, when the endless rib 34 is formed in a rectangular frame shape, refers to the widths of the short side and the long side of the opening of the endless rib 34, and when the endless rib 34 is formed in an annular shape, refers to the inner diameter of the endless rib 34. The opening width on the other end side of the second acoustic path 28c of the second gasket 28, when the opening on the other end side of the second acoustic path 28c of the second gasket 28 is formed in a rectangular shape, refers to the widths of the short side and the long side of the opening, and when the opening is formed in a circular shape, refers to the inner diameter of the opening.

[0025] "Substantially the same" does not mean that the opening width of the endless rib 34 is limited to exactly the same dimension as the opening width on the other end side of the second acoustic path 28c of the second gasket 28, but includes the meaning that the dimension is slightly larger than the opening width on the other end side of the second acoustic path 28c of the second gasket 28. Thereby, the endless rib 34 will not be crushed by the first gasket 24 to block a part of the opening on the other end side of the second acoustic path 28c of the second gasket 28. Here, it goes without saying that after being crushed by the first gasket 24, the opening width of the endless rib 34 is the same as or wider than the opening width on the other end side of the second acoustic path 28c of the second gasket 28.

[0026] The opening width of the endless rib 34 is set to be smaller than the sum of the inner diameter of the first acoustic path 24c of the first gasket 24 and the allowable deviation amount of the opening center on the other end side of the second acoustic path 28c of the second gasket 28 with respect to the opening center of the first acoustic path 24c of the first gasket 24. Thereby, even if there is a relative positional deviation between the first gasket 24 and the second gasket 28 due to an assembly error of the wearable speaker device 10 (see FIG. 1), the endless rib 34 does not block a part of the opening on the other end side of the first acoustic path 24c of the first gasket 24.

[0027] (Operational effects of Embodiment 1) Subsequently, the operational effects of Embodiment 1 will be described.

[0028] As described above, the first gasket 24 covering the microphone element 18 is configured to be non-contact with the inner wall surface 12f of the cabinet 12. Further, the opposing surface 24f of the first gasket 24 and the opposing surface 28f of the second gasket 28 are locally in contact via the endless rib 34. Therefore, even when an object such as hair contacts the cabinet 12, the vibration transmitted from the cabinet 12 to the microphone element 18 via the second gasket 28 and the first gasket 24 can be reduced.

[0029] Therefore, according to Embodiment 1, even in the above-described case, the structure-borne sound transmitted from the cabinet 12 to the microphone element 18 can be sufficiently reduced, and a decrease in the sound quality collected by the microphone element 18 can be suppressed. In particular, since an extra step generated between the second acoustic path 28c of the second gasket 28 and the first acoustic path 24c of the first gasket 24 can be reduced, a decrease in the sound quality collected by the microphone element 18 can be sufficiently suppressed.

[0030] 〔Embodiment 2〕 Embodiment 2 will be described with reference to FIG. 5. FIG. 5 is a schematic cross-sectional view of a microphone mounting structure according to Embodiment 2. For the sake of convenience of explanation, members having the same functions as those described in Embodiment 1 are denoted by the same reference numerals, and their descriptions will not be repeated.

[0031] (Microphone mounting structure 36) As shown in FIG. 5, the microphone mounting structure 36 according to the second embodiment is a structure for mounting the microphone element 18 inside the tip side of one arm portion 12a in the cabinet 12, and has the same configuration as the microphone mounting structure 20 (see FIG. 2) according to the first embodiment. Hereinafter, only the differences from the microphone mounting structure 20 in the configuration of the microphone mounting structure 36 will be described.

[0032] On the opposing surface 24f of the first gasket 24, an endless rib 38 in a rectangular frame shape is formed so as to surround the opening of the first acoustic path 24c. The endless rib 38 surrounds the opening at the other end side of the second acoustic path 28c on the opposing surface 28f of the second gasket 28. In other words, an endless rib 38 as an endless member is provided between the opposing surface 24f of the first gasket 24 and the opposing surface 28f of the second gasket 28 so as to surround the openings of the first acoustic path 24c and the second acoustic path 28c. The endless rib 38 is in pressure contact with the peripheral edge of the opening of the second acoustic path 28c on the opposing surface 28f of the second gasket 28, and a part of the endless rib 38 is in a crushed state due to the pressure contact. In FIG. 5, the state before a part of the endless rib 38 is crushed is shown by a two-dot chain line.

[0033] (Operational effects of the second embodiment) And also in the second embodiment, the same operational effects as those of the first embodiment described above are achieved.

[0034] 〔Third embodiment〕 The third embodiment will be described with reference to FIG. 6. FIG. 6 is a schematic cross-sectional view of the microphone mounting structure according to the third embodiment. For the sake of convenience of explanation, members having the same functions as the members described in the first embodiment are denoted by the same reference numerals, and their descriptions will not be repeated.

[0035] (Microphone mounting structure 40) As shown in FIG. 6, the microphone attachment structure 40 according to Embodiment 3 is a structure for attaching the microphone element 18 inside the tip side of one arm portion 12a in the cabinet 12, and has the same configuration as the microphone attachment structure 20 (see FIG. 2) according to Embodiment 1. Hereinafter, only the parts of the configuration of the microphone attachment structure 40 that are different from the microphone attachment structure 20 will be described.

[0036] The second gasket 28 is divided into two split gaskets 42 and 44. Each split gasket 42 (44) has an opening of the second acoustic path 28c on its split surface 42f (44f). One split gasket 42 is located on the side closer to the sound hole 12h of the cabinet 12, and the other split gasket 44 is located on the side closer to the first acoustic path 24c of the first gasket 24. The split surfaces 42f (44f) of the respective split gaskets 42 (44) are parallel to the center line direction of the first acoustic path 24c of the first gasket 24. One split gasket 42 is smaller than the other split gasket 44. Note that the split surface 42f (44f) of each split gasket 42 (44) refers to the surface of each split gasket 42 (44) that has been split.

[0037] An annular second endless rib 46 is formed on the split surface 42f of one split gasket 42 so as to surround the opening of the second acoustic path 28c. The second endless rib 46 surrounds the opening of the second acoustic path 28c on the split surface 44f of the other split gasket 44. In other words, a second endless rib 46 as a second endless member is provided between the split surface 42f of one split gasket 42 and the split surface 44f of the other split gasket 44 so as to surround the opening of the second acoustic path 28c. The second endless rib 46 is in pressure contact with the peripheral edge of the opening of the second acoustic path 28c on the split surface 44f of the other split gasket 44, and a part of the second endless rib 46 is in a crushed state due to the pressure contact.

[0038] (Operational Effects of Embodiment 3) And in Embodiment 3, in addition to exhibiting the same operational effects as those of the aforementioned Embodiment 1, the following operational effects are exhibited.

[0039] The other split gasket 44 is located closer to the first acoustic path 24c of the first gasket 24 and faces the first gasket 24. In other words, the gasket that locally contacts the facing surface 24f of the first gasket 24 via the endless rib 34 becomes smaller. Also, the split surface 42f of one split gasket 42 and the split surface 44f of the other split gasket 44 locally contact via the second endless rib 46. Thereby, even when an object contacts the cabinet 12, the vibration transmitted from the cabinet 12 to the microphone element 18 can be more sufficiently reduced. Therefore, according to Embodiment 3, the effects of Embodiment 1 can be further enhanced.

[0040] 〔Modification Example 1 of Embodiment 3〕 Modification Example 1 of Embodiment 3 will be described with reference to FIG. 7. FIG. 7 is a schematic cross-sectional view of a microphone mounting structure according to Modification Example 1 of Embodiment 3. For convenience of explanation, members having the same functions as those described in Embodiment 1 are denoted by the same reference numerals, and their descriptions will not be repeated.

[0041] (Microphone mounting structure 48) As shown in FIG. 7, the microphone mounting structure 48 according to the modification of Embodiment 3 is a structure for mounting the microphone element 18 inside the tip side of one arm portion 12a in the cabinet 12, and has the same configuration as the microphone mounting structure 40 (see FIG. 2) according to Embodiment 3. Hereinafter, only the parts of the configuration of the microphone mounting structure 48 that are different from the microphone mounting structure 40 will be described.

[0042] The split surface 42f (44f) of each split gasket 42 (44) is inclined with respect to the center line direction of the first acoustic path 24c of the first gasket 24. The other split gasket 44 is smaller than one split gasket 42.

[0043] (Operational Effects of Modification Example 1 of Embodiment 3) In the modification of Embodiment 3, the gasket that locally contacts the opposing surface 24f of the first gasket 24 via the endless rib 34 becomes smaller. Therefore, according to the first modification of Embodiment 3, the effects of Embodiment 3 can be further enhanced.

[0044] 〔Second Modification of Embodiment 3〕 The second modification of Embodiment 3 will be described with reference to FIG. 8. FIG. 8 is a schematic cross-sectional view of the microphone mounting structure according to the second modification of Embodiment 3. For convenience of explanation, members having the same functions as those described in Embodiment 1 are denoted by the same reference numerals, and their descriptions will not be repeated.

[0045] (Microphone Mounting Structure 50) As shown in FIG. 6, the microphone mounting structure 50 according to the second modification of Embodiment 3 is a structure for mounting the microphone element 18 inside the tip side of one arm portion 12a in the cabinet 12, and has the same configuration as the microphone mounting structure 40 (see FIG. 2) according to Embodiment 3. Hereinafter, only the differences from the microphone mounting structure 40 in the configuration of the microphone mounting structure 50 will be described.

[0046] The dividing surfaces 42f (44f) of the respective divided gaskets 42 (44) are orthogonal to the center line direction of the first acoustic path 24c of the first gasket 24. The other divided gasket 44 is smaller than the one divided gasket 42 and is configured to be non-contact with the inner wall surface 12f of the cabinet 12.

[0047] (Operational Effects of the Second Modification of Embodiment 3) In the modification of Embodiment 3, the gasket that locally contacts the opposing surface 24f of the first gasket 24 via the endless rib 34 becomes smaller and is configured to be non-contact with the inner wall surface 12f of the cabinet 12. Therefore, according to the second modification of Embodiment 3, the effects of Embodiment 3 can be further enhanced.

[0048] (Other Embodiments) In Embodiments 1 to 3, Modifications 1 and 2 of Embodiment 3, instead of providing the endless rib 34 or 38 between the facing surface 24f of the first gasket 24 and the facing surface 28f of the second gasket 28, other endless members such as an endless spacer or an O-ring may be provided. In Embodiment 3, Modifications 1 and 2 thereof, instead of providing the second endless rib 46 between the dividing surface 42f of one divided gasket 42 and the dividing surface 44f of the other divided gasket 44, other second endless members such as a second endless spacer or an O-ring may be provided.

[0049] Further, the microphone mounting structure applied to the wearable speaker device 10 (see FIG. 1) may be applied to electronic devices other than the wearable speaker device 10 such as a television receiver, a smartphone, a mobile phone, a tablet terminal, and a cooking heater.

[0050] 〔Summary〕 The electronic device according to Aspect 1 of the present invention includes a cabinet in which a sound hole for introducing sound is formed, a microphone substrate provided inside the cabinet and on which a microphone element for collecting sound is mounted, and a first gasket provided on the microphone substrate so as to cover the microphone element and configured to be non-contact with the cabinet, and having a first acoustic path communicating with the microphone hole of the microphone element, a second gasket provided inside the cabinet so as to face the first gasket and having a second acoustic path connecting the sound hole of the cabinet and the first acoustic path of the first gasket, and an endless member provided between the facing surface of the first gasket and the facing surface of the second gasket so as to surround the openings of the first acoustic path and the second acoustic path.

[0051] According to the above configuration, as described above, the first gasket covering the microphone element is configured to be non-contact with the cabinet. Further, the opposing surface of the first gasket and the opposing surface of the second gasket are locally in contact via the endless member. Therefore, even when an object contacts the cabinet, the vibration transmitted from the cabinet to the microphone element via the second gasket and the first gasket can be reduced. Thus, also in the above case, the airborne sound transmitted from the cabinet to the microphone element can be sufficiently reduced, and the deterioration of the sound quality collected by the microphone element can be suppressed.

[0052] The electronic device according to Embodiment 2 of the present invention is, in the Embodiment 1, wherein the endless member is an endless rib formed so as to surround the opening of the second acoustic path on the opposing surface of the second gasket, and the endless rib may surround the opening of the first acoustic path of the first gasket.

[0053] According to the above configuration, the opposing surface of the first gasket and the opposing surface of the second gasket are locally in contact via the endless rib.

[0054] The electronic device according to Embodiment 3 of the present invention is, in the Embodiment 2, wherein the opening width of the endless rib may be set to be substantially the same as the opening width of the second acoustic path of the second gasket.

[0055] According to the above configuration, an extra step generated between the second acoustic path of the second gasket and the first acoustic path of the first gasket can be reduced, and the deterioration of the sound quality collected by the microphone element can be sufficiently suppressed.

[0056] The electronic device according to Embodiment 4 of the present invention is, in the Embodiment 2 or 3, wherein the opening width of the endless rib may be set to be smaller than the sum of the opening width of the first acoustic path of the first gasket and the allowable deviation amount of the opening center of the second acoustic path of the second gasket with respect to the opening center of the first acoustic path of the first gasket.

[0057] According to the above configuration, even if there is a relative displacement between the first gasket and the second gasket due to an assembly error of the electronic device, the endless rib does not block a part of the opening of the first acoustic path of the first gasket.

[0058] In the electronic device according to Embodiment 5 of the present invention, in the above Embodiment 1, the endless member is an endless rib formed so as to surround the opening of the first acoustic path on the facing surface of the first gasket, and the endless rib may surround the opening of the second acoustic path of the second gasket.

[0059] According to the above configuration, the facing surface of the first gasket and the facing surface of the second gasket are locally in contact via the endless rib.

[0060] In the electronic device according to Embodiment 6 of the present invention, in any one of the above Embodiments 1 to 5, the second gasket is divided into two divided gaskets, and each divided gasket has an opening of the second acoustic path on its dividing surface. Further, a second endless member may be provided between the dividing surface of one of the divided gaskets and the dividing surface of the other divided gasket to surround the opening of the second acoustic path.

[0061] According to the above configuration, any one of the two divided gaskets is located closer to the first acoustic path of the first gasket and faces the first gasket. In other words, the gasket that is locally in contact with the facing surface of the first gasket via the endless member becomes smaller. Also, the facing surface of one of the divided gaskets and the facing surface of the other divided gasket are locally in contact via the second endless member. Thereby, even when an object contacts the cabinet, the vibration transmitted from the cabinet to the microphone element can be more sufficiently reduced.

[0062] In the electronic device according to Embodiment 7 of the present invention, in the above Embodiment 6, at least one of the two divided gaskets may be configured to be non-contact with the cabinet.

[0063] According to the above configuration, even when an object contacts the cabinet, the vibration transmitted from the cabinet to the microphone element can be further reduced.

[0064] In the electronic device according to aspect 8 of the present invention, in the above aspect 7, any of the divided gaskets may be a divided gasket closer to the first acoustic path of the first gasket.

[0065] According to the above configuration, even when an object contacts the cabinet, the vibration transmitted from the cabinet to the microphone element can be further reduced.

[0066] In the electronic device according to aspect 9 of the present invention, in any of the above aspects 1 to 8, the cabinet may be capable of being hung by the neck.

[0067] According to the above configuration, even when hair as an example of an object contacts the cabinet, the structure-borne sound transmitted from the cabinet to the microphone element can be sufficiently reduced, and a decrease in the sound quality collected by the microphone element can be suppressed.

Example

[0068] Hereinafter, an example of the present invention will be described with reference to FIG. 9. FIG. 9 is a diagram showing measurement results of structure-borne sound transmitted to a microphone element for an invention product and a comparative product.

[0069] The inventor prototyped a wearable speaker device 10 (see FIG. 2) having a microphone mounting structure 20 (see FIG. 2) as an invention product. The inventor prepared a wearable speaker device using one gasket (not shown) as a comparative product instead of the first gasket 24 (see FIG. 2) and the second gasket 28 (see FIG. 2) in the microphone mounting structure 20. Note that an acoustic path connecting the sound hole 12h (see FIG. 2) of the cabinet 12 and the microphone hole 18h (see FIG. 2) of the microphone element 18 is formed in one gasket.

[0070] After that, the inventor rubbed the cabinet 12 in the invention product and the comparative product with a pen and measured the solid-borne sound transmitted to the microphone element 18. Then, when the measurement results were summarized by frequency analysis, they became as shown in FIG. 9.

[0071] That is, in the case of the comparative product, the rubbing sound was measured as solid-borne sound, whereas in the case of the invention product, it was confirmed that the solid-borne sound transmitted to the microphone element 18 was sufficiently reduced and the rubbing sound was below the measurement limit.

Explanation of Reference Numerals

[0072] 10 Wearable speaker device (electronic device) 12 Cabinet 12a Arm portion 12b Connecting portion 12f Inner wall surface 12h Sound hole 14 Speaker 16 Sound emitting portion 18 Microphone element 18h Microphone hole 20 Microphone mounting structure 22 Microphone substrate 24 First gasket 24f Opposing surface 24c First acoustic path 24d Fitting recess 26 Double-sided tape 28 Second gasket 27f Opposing surface 28c Second acoustic path 30 Partition 32 Support rib 34 Endless rib (endless member) 36 Microphone mounting structure 38 Endless rib 40 Microphone mounting structure 42 Split gasket 42f Split surface 44 Split gasket 44f Split surface 46 Second endless rib (second endless member) 48 Microphone mounting structure 50 Microphone mounting structure

Claims

1. A cabinet formed with sound holes for introducing sound, a microphone substrate provided inside the cabinet and having a microphone element mounted thereon for collecting sound, a first gasket provided so as to cover the microphone element on the microphone substrate, configured to be non-contact with the cabinet, and having a first acoustic path formed therein that communicates with the microphone hole of the microphone element, a second gasket provided inside the cabinet opposite to the first gasket, and having a second acoustic path formed therein that connects the sound hole of the cabinet and the first acoustic path of the first gasket, an endless member provided between the opposing surfaces of the first gasket and the second gasket so as to surround the openings of the first acoustic path and the second acoustic path, and the endless member being press-contacted by the opposing surfaces of the first gasket and the second gasket, an electronic device comprising the same.

2. The endless member is an endless rib formed on the opposing surface of the second gasket so as to surround the opening of the second acoustic path, and the endless rib surrounds the opening of the first acoustic path of the first gasket. The electronic device according to claim 1.

3. The opening width of the endless rib is set to be substantially the same as the opening width of the second acoustic path of the second gasket. The electronic device according to claim 2.

4. The opening width of the endless rib is set to be smaller than the sum of the opening width of the first acoustic path of the first gasket and the allowable deviation amount of the opening center of the second acoustic path of the second gasket with respect to the opening center of the first acoustic path of the first gasket. The electronic device according to claim 2 or 3.

5. The endless member is an endless rib formed on the opposing surface of the first gasket so as to surround the opening of the first acoustic path, and the endless rib surrounds the opening of the second acoustic path of the second gasket. The electronic device according to claim 1.

6. The second gasket is divided into two split gaskets, and each split gasket has an opening of the second acoustic path on its split surface, and further, a second endless member provided between the split surfaces of one of the split gaskets and the other split gasket and surrounding the opening of the second acoustic path is provided. The electronic device according to any one of claims 1 to 5.

7. One of the two split gaskets has one end of the second acoustic path communicating with the sound hole formed therein, and the other split gasket has the other end of the second acoustic path communicating with the first acoustic path formed therein. The electronic device according to claim 6, wherein the other split gasket is configured to be non-contact with the inner wall surface of the cabinet.

8. The electronic device according to claim 7, wherein the other split gasket is a split gasket on the side of the first gasket close to the first acoustic path.

9. The electronic device according to any one of claims 1 to 8, wherein the cabinet is wearable.

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