Electronic device

Abstract

To provide an electronic device which has high acoustic characteristics of sound collection and enables simple manufacturing process.SOLUTION: An electronic device 1 includes: a housing (11) formed with a sound reception hole (15) for leading sound outside the housing to the inside of the housing; a substrate (13) which is disposed in the housing and on which a microphone (14) is mounted; an elastic member (12) which is arranged so as to fill a gap between an inner wall of the housing, which excludes a periphery of the sound reception hole, and the substrate, so as to form a space between the inner wall of the housing in the periphery of the sound reception hole and the substrate; and a space occupation member (16) which is arranged so as to occupy a part of the space.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to an electronic device.

Background Art

[0002] In electronic devices equipped with a microphone mechanism such as a TV receiver, a tablet, or a mobile phone, various technologies for improving the sound reception level have been developed. For example, Japanese Patent Application Laid-Open No. 2008-193249 discloses an electronic device (mobile phone) having the following configuration.

[0003] A plurality of sound reception holes for picking up external sounds are provided in the front housing of the electronic device, and sound guiding holes for guiding sound to the microphone are formed in a substrate on which the microphone arranged inside the housing is mounted. The sound that enters the housing from the sound reception holes is guided to the microphone through the sound guiding holes. In order to prevent leakage of sound from outside the sound reception holes, the periphery of the sound reception holes in the space between the housing and the substrate is covered with an elastic member (standing wall portion). The elastic member is provided with holes for guiding sound to the microphone.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Here, the space formed inside the housing may be somewhat wide when it is a near-field microphone that picks up sound near the device, such as the microphone of a mobile phone. On the other hand, for example, in the case of a far-field microphone that picks up sound at a certain distance from the device, such as a microphone of a TV receiver, the smaller the space formed inside the housing, the better the acoustic characteristics of sound collection. Therefore, it is better to make the holes provided in the elastic member that covers the space between the housing and the substrate smaller. However, if the holes in the elastic member are made smaller, it becomes difficult to align the holes formed in the elastic member, the sound receiving holes, and the sound guiding holes during the production process, and there is a risk of blocking the space that is the sound passage during assembly.

[0006] In view of the above circumstances, an object of the present invention is to provide an electronic device that has good acoustic characteristics for sound collection and is easy to assemble in the production process.

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 housing in which a sound receiving hole for guiding sound outside the housing into the housing is formed, a substrate disposed inside the housing and on which a microphone is mounted, and an elastic member disposed so as to fill a gap between the inner wall of the housing other than the periphery of the sound receiving hole and the substrate so that a space is formed between the inner wall of the housing around the sound receiving hole and the substrate, and a space occupying member disposed so as to occupy a part of the space.

[0008] According to the above configuration, by providing an occupying member that occupies a part of the space formed between the housing and the substrate of the electronic device, the volume of the space is reduced, the acoustic characteristics of sound collection of the microphone are improved, and the speech recognition rate can be increased. In addition, since the holes formed in the elastic member for guiding the sound from the sound receiving hole to the microphone can be made relatively large, assembly can be facilitated in the production process.

Effects of the Invention

[0009] According to an aspect of the present invention, an object is to provide an electronic device that has good acoustic characteristics for sound collection and is easy to assemble in the production process.

Brief Description of the Drawings

[0010]

Figure 1

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Figure 15

Figure 16

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Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments according to one aspect of the present invention (hereinafter also referred to as "the present embodiment") will be described with reference to the drawings.

[0012] 〔Embodiment〕 Hereinafter, embodiments of the present invention will be described with reference to the drawings. <Configuration of TV Receiver> FIG. 1 is a perspective view showing an example of the appearance of an electronic device (TV receiver) 1 according to the present embodiment. As the electronic device to which the present invention is applied, in addition to a TV receiver, a tablet or the like may also be used. At the bottom of the display screen of the TV receiver 1, a microphone unit device 10 is provided. Hereinafter, the configuration of the microphone unit device 10 will be described. In the following description, the display screen side of the TV receiver 1 is defined as the front (or the front surface), and the opposite side is defined as the rear (or the back surface).

[0013] <Configuration of Microphone Unit Device> FIG. 2 is a rear view of the microphone unit device 10, and FIG. 3 is an exploded perspective view of the microphone unit device 10 as viewed obliquely from the front. As shown in FIG. 3, the microphone unit device 10 is composed of a housing 11, a substrate 13, and a substrate holder 20, and is assembled with screws S.

[0014] The housing 11 is made of a material such as polycarbonate and covers the front side of the microphone unit device 10. Two sound receiving holes 15 for guiding the sound outside the housing 11 into the housing 11 are formed at positions substantially evenly from the center in the left - right direction of the housing 11.

[0015] Two microphones 14 are mounted on the substrate 13. The substrate 13 is composed of, for example, a printed circuit board. In addition to the microphones 14, various components for constituting the microphone unit device 10 are mounted. The components are, for example, connectors, resistors, and capacitors.

[0016] The two sound receiving holes 15 provided in the housing 11 and the two microphones 14 are arranged at corresponding positions. Also, an elastic member 12 is arranged so as to fill the gap between the inner wall of the housing 11 other than the periphery of the sound receiving hole 15 and the substrate 13 so that a space is formed between the inner wall of the housing 11 around the sound receiving hole 15 and the substrate 13.

[0017] As shown in FIG. 3, a substrate holder 20 is arranged behind the substrate 13. As shown by the arrow d, by pressing the substrate 13 against the housing 11 side from the rear by the substrate holder 20, the elastic member 12 can be held in a compressed state, and the substrate 13 can be brought into close contact with the housing 11.

[0018] FIG. 4 is a cross - sectional view of the microphone unit device 10 assembled as described above, looking from above. The lower side of FIG. 4 faces the front of the TV receiver 1 (and the microphone unit device 10), and the upper side faces the rear of the TV receiver 1.

[0019] Further, FIG. 5 is an enlarged partial view of the portion within the frame in FIG. 4, and shows the configuration around one of the two microphones 14 mounted on the microphone unit device 10. FIG. 6 is a side cross-sectional view of the microphone unit device 10 taken along a cross-section including the microphone 14, where the right side in FIG. 6 corresponds to the front of the TV receiver 1 and the left side corresponds to the rear of the TV receiver 1.

[0020] Also, FIG. 7 is an enlarged partial view of the portion within the frame in FIG. 5. However, in FIG. 7, the vertical direction is reversed compared to FIG. 5, where the upper side in FIG. 7 corresponds to the front of the TV receiver 1 (or the microphone unit device 10) and the lower side corresponds to the rear of the TV receiver 1. Hereinafter, with reference to FIG. 7, the configuration around the sound receiving hole 15 of the microphone unit device 10 in the embodiment will be described in detail.

[0021] As described above, the front portion of the microphone unit device 10 is covered by the housing 11, and external sound is guided from the sound receiving hole 15 provided in the housing 11 into the housing 11. Further, a space occupying member 16 is arranged in the housing 11 so as to occupy a part of the space. As shown in FIG. 7, the space occupying member 16 may be formed to protrude from the inner wall of the housing 11 into the space.

[0022] A microphone 14 is mounted on the substrate 13 arranged inside the housing 11. In this embodiment, the microphone 14 is arranged on the surface of the substrate 13 opposite to the space side. A sound guiding hole 17 is formed in the substrate 13, penetrating from the surface of the substrate 13 on the space side to the surface on the microphone 14 side.

[0023] Also, the elastic member 12 is arranged to fill the gap between the inner wall of the housing 11 and the substrate 13 except around the sound receiving hole 15 so that a space is formed between the inner wall of the housing 11 around the sound receiving hole 15 and the substrate 13.

[0024] The elastic member 12 is formed of a cushioning material having elasticity such as rubber, urethane, and foamed urethane, fills the gap between the substrate 13 and the housing (front cover) 11, and adheres between the substrate 13 and the housing 11 to prevent the intrusion of sound from outside the sound receiving hole 15 of the housing 11. As shown in FIG. 7, the elastic member 12 is provided with a hole 19 at a portion connecting the sound receiving hole 15 and the sound guiding hole 17. The sound guided from the sound receiving hole 15 into the housing 11 is guided to the microphone 14 through the hole 19 and the sound guiding hole 17 of the elastic member 12. A double-sided tape is installed between the elastic member 12 and the substrate 13 as a fixing means.

[0025] The elastic member 12 is fixed to the substrate 13 with a double-sided tape, the substrate 13 is overlaid on the elastic member 12, the elastic member 12 and the substrate 13 are sandwiched between the housing 11 and the substrate holder 20, and the housing 11 and the substrate holder 20 are tightened and fixed with a fixing screw S.

[0026] The sound hole of the entire microphone unit device 10 is a sound passage formed between the sound receiving hole 15 of the housing 11 and the sound guiding hole 17 of the substrate 13, and is formed by the space of the sound receiving hole 15 in the housing 11, the space of the sound guiding hole 17 in the substrate 13, and the space of the sound hole 19 in the elastic member 12.

[0027] According to such a configuration, sound enters from the sound receiving hole 15 into the hole 19. At this time, the entire sound hole functions as a resonance space, and sound enters the microphone 14 through the sound guiding hole 17 of the substrate 13. The microphone 14 converts the incoming sound into an electrical signal, and an electrical signal having a level corresponding to the converted sound is obtained.

[0028] What is important here is the size (volume) of the entire sound hole. For example, in order to realize a hands-free voice recognition function in the TV receiver 1, a far-field microphone for picking up distant sounds is required. In that case, the smaller the size of the sound hole of the microphone unit device 10, the better the acoustic characteristics of sound collection and the higher the voice recognition rate.

[0029] Therefore, the hole 19 formed in the elastic member 12 should preferably be small. However, since the elastic member 12 is made of a material different from that of the substrate 13 and the housing 11, it is necessary to attach it to the substrate 13 and the housing 11 in the production process. Therefore, in order to avoid the risk of blocking the sound hole during assembly, it is preferable to make the hole 19 of the elastic member 12 as large as possible. However, as described above, the smaller the volume of the sound hole, the better the sound collection acoustic characteristics and the higher the speech recognition rate. For this reason, by providing the space occupying member 16 inside the housing 11 to double the portion surrounding the sound hole and reducing the volume of the overall sound hole, the sound receiving characteristics can be improved and the speech recognition rate can be made good.

[0030] Note that FIG. 8 shows a view of the state in which the substrate 13 is attached to the housing 11 as seen from the inside of the housing. At the time of assembly, it is necessary to align the sound receiving hole 15 and the hole 19 provided in the elastic member 12 so as not to block the sound hole. For this reason, as shown in FIG. 8, positioning ribs 21 are formed on the housing 11, and positioning holes are provided at corresponding positions of the elastic member 12, so that the housing 11 and the elastic member 12 are correctly positioned and deformation of the elastic member 12 in the lateral direction is prevented.

[0031] 〔Embodiment of Variation〕 The configuration of the embodiment described above is an example of the present invention, and various variations are conceivable for the configuration around the sound receiving hole 15 of the electronic device 1 of the present invention other than the configuration of the above embodiment. FIGS. 9 to 13 below are diagrams showing variations of the configuration shown within the frame of FIG. 7. Hereinafter, the configurations of these variations will be described.

[0032] 〔Variation 1〕 In the embodiment, a configuration example in which the space occupying member 16 is formed to protrude from the inner wall of the housing 11 toward the space has been described. However, the space occupying member may be formed to protrude from the substrate 13 toward the space. For example, as shown in FIG. 9, the space occupying member 161 may be provided integrally with the substrate 13.

[0033] According to the above configuration, when changing the design of the space-occupying member 161, it is not necessary to change the mold of the housing 11, and the manufacturing process can be simplified.

[0034] 〔Variation 2〕 The space-occupying member may protrude into the space from both the housing 11 side and the substrate 13 side. For example, as shown in FIG. 10, the space-occupying member 162 may protrude into the space from the housing 11 side, and the space-occupying member 161 may protrude into the space from the substrate 13 side.

[0035] According to the above configuration, since the space-occupying members 161 and 162 protrude into the space from both the housing 11 and the substrate 13, the volume of the entire space can be further reduced, and the acoustic characteristics of sound collection can be improved.

[0036] 〔Variation 3〕 Further, the microphone unit device 10 may include a second space-occupying member 163 arranged to occupy a part of the sound receiving hole 15. For example, as shown in FIG. 11, a plurality of sound receiving holes may be formed in the housing 11 by the second space-occupying member 163 protruding into the space from the housing 11 side.

[0037] According to the above configuration, by providing the second space-occupying member 163, the volume of the entire space can be further reduced, and the acoustic characteristics of sound collection can be improved.

[0038] 〔Variation 4〕 Further, in the microphone unit device 10, the space-occupying member 164 may be arranged on the space side of the substrate 13. For example, as shown in FIG. 12, a space-occupying member 164 that is separate from the housing 11 and the substrate 13 may be arranged on the substrate 13. The space-occupying member 164 may be, for example, a component of the microphone unit device 10 mounted on the substrate 13. Also, the arrangement position, shape, size, etc. of the space-occupying member 164 may be arbitrary.

[0039] According to the above configuration, since the space-occupying member 164, which is separate from the housing 11 and the substrate 13, can be arranged on the substrate 13, the shape, size, and arrangement position of the space-occupying member 164 can be freely designed.

[0040] 〔Variation 5〕 Also, in the microphone unit device 10, as shown in FIG. 13, the microphone 14 may be arranged on the space side of the substrate 13. According to the above configuration, since the microphone 14 itself occupies space and reduces the volume of the space, the acoustic effect of sound collection can be enhanced by combining with the space-occupying member 162. Also, since there is no need to form sound guiding holes in the substrate 13, the manufacturing process can be simplified.

[0041] Also, the microphone unit device 10 may further arrange a space-occupying member, which is separate from the microphone 14, the housing 11, and the substrate 13, in the empty space on the space side of the same substrate 13 as the microphone 14 after arranging the microphone 14 on the space side of the substrate 13. Also, the space-occupying member may be attached with double-sided tape or an adhesive to an area on the surface opposite to the surface in contact with the substrate 13 among the surfaces constituting the microphone 14 and within a region where the sound reception performance of the microphone 14 does not deteriorate. According to such a configuration, the volume of the space can be reduced by the microphone 14 and the space-occupying member arranged on the space side of the substrate, and the acoustic effect of sound collection can be enhanced.

[0042] Furthermore, the microphone unit device 10 may be provided with a space-occupying member 162 protruding from the housing 11 as shown in FIG. 13 after arranging a space-occupying member, which is separate from the microphone 14 and the substrate 13, on the space side of the substrate 13. According to such a configuration, the volume of the space can be reduced by the microphone 14, the space-occupying member 162 protruding from the housing 11, and the space member, which is separate from the housing 11 and the substrate 13, and the acoustic effect of sound collection can be further enhanced.

[0043] The following FIGS. 14 to 21 are views of the state in which the elastic member 12 is attached to the housing 11, as seen from the back side (i.e., the inner side of the housing 11) of the microphone unit device 10 for various variations. Hereinafter, with reference to FIGS. 14 to 21, the configurations of various variations will be described from another angle.

[0044] 〔Variation 6〕 In Variation 6, as shown in FIG. 14, the space occupying member 16 is annular, and the inner diameter of the space occupying member 16 may coincide with the outer diameter of the sound receiving hole 15. That is, FIG. 14 corresponds to the cross-sectional view of FIG. 7. According to the above configuration, the volume of the space occupying member 16 can be increased, and the acoustic effect of sound collection can be improved.

[0045] 〔Variation 7〕 In Variation 7, as shown in FIG. 15, the space occupying member 16 is annular, and the inner diameter of the space occupying member 16 may be larger than the outer diameter of the sound receiving hole 15.

[0046] According to the above configuration, when the sound receiving hole 15 is drilled in the housing 11 later, the workability can be improved.

[0047] 〔Variation 8〕 In Variation 8, the space occupying member 16 may be arranged so as to surround a part of the sound receiving hole 15. For example, as shown in FIG. 16, the space occupying member 16 may be arranged so as to surround the sound receiving hole 15 only in the horizontal direction in FIG. 16 without surrounding the entire periphery of the sound receiving hole 15.

[0048] According to the above configuration, when there is not enough space in the vertical direction, the space occupying member 16 can be appropriately arranged. Further, if the space occupying member 16 is arranged away from the sound receiving hole 15, when the sound receiving hole 15 is drilled in the housing 11 later, the workability can be improved.

[0049] 〔Variation 9〕 In the embodiments and the above variations, an example where the outer edges of the space and the space occupying member 16 are annular has been described. However, in the microphone unit device 10 of the present invention, the space may have a polygonal shape when viewed from the normal direction of the housing 11, and the outer edge of the space occupying member 16 may also have a polygonal shape when viewed from the normal direction of the housing 11. For example, as shown in FIGS. 17 and 18, the outer edges of both the space and the space occupying member 16 may be rectangular. Further, as shown in FIG. 18, the space occupying member 16 may be arranged so as to surround the sound receiving hole 15 only in the lateral direction.

[0050] According to the above configuration, by making the space occupying member 16 polygonal, the volume of the space occupying member 16 can be increased. As a result, the volume of the space can be decreased, and the acoustic effect of sound collection can be improved.

[0051] 〔Variation 10〕 In Variation 10, as shown in FIG. 19, a plurality of sound receiving holes 15 may be provided in the housing 11, and holes may be formed at positions corresponding to the sound receiving holes 15. According to the above configuration, the area of the space can be relatively decreased, and the acoustic characteristics of sound collection can be improved.

[0052] 〔Variation 11〕 In Variation 11, as shown in FIG. 20, a plurality of sound receiving holes 15 are provided in the housing 11, the space occupying member 16 is annular, and the inner edge of the space occupying member 16 may be outside the outer edge of the sound receiving hole 15. That is, FIG. 20 corresponds to FIG. 11 above. According to the above configuration, the area of the space can be relatively decreased, and the acoustic characteristics of sound collection can be improved. When the sound receiving hole 15 is later drilled in the housing 11, the workability can be improved.

[0053] 〔Variation 12〕 In this embodiment, a housing in which a first sound receiving hole group and a second sound receiving hole group for guiding sound outside the housing into the housing are formed, a substrate disposed in the housing and having a first microphone for receiving sound from the first sound receiving hole group and a second microphone for receiving sound from the second sound receiving hole group mounted thereon, a first elastic member disposed so as to fill a gap between the inner wall of the housing around the first sound receiving hole group and the substrate so that a first space is formed between the inner wall of the housing around the first sound receiving hole group and the substrate, a second elastic member disposed so as to fill a gap between the inner wall of the housing around the second sound receiving hole group and the substrate so that a second space is formed between the inner wall of the housing around the second sound receiving hole group and the substrate, a first space occupying member disposed so as to occupy a part of the first space, and a second space occupying member disposed so as to occupy a part of the second space are provided, and any one of the arrangement positions and shapes of the first space occupying member and the second space occupying member, the volumes of the first space and the second space, and the number of sound receiving holes included in the first sound receiving hole group and the second sound receiving hole group may be different. For example, as shown in FIG. 21, the first space occupying member 16 may be enlarged around the left first microphone 14, and the second space occupying member may be reduced around the right second microphone. Alternatively, the space occupying member 16 may not be provided around the first microphone 14, and the space occupying member 16 may be provided only around the second microphone 14. According to the above configuration, near-field sound can be picked up by one microphone, and far-field sound can be picked up by the other microphone. Therefore, it is possible to respond to both near-field and far-field sounds.

[0054] 〔Manufacturing Method〕 Next, an example of a manufacturing method of the microphone unit device 10 will be described. The manufacturing method of the microphone unit device 10 includes the following molding process, substrate molding process, and assembly process. (a) Molding Process The housing 11 and the substrate holder 20 are molded in advance. The elastic member 12 is processed into a predetermined shape. (b) Substrate Molding Process The substrate 13 is formed, and a microphone 14 and other components are mounted on the substrate 13. (c) Assembly process A double-sided tape is attached to the surface portion surrounded by the protrusions of the elastic member 12. The elastic member 12 is placed on the substrate 13, and the substrate holder 20 is placed on the substrate 13 and covered, and then fitted into the housing 11. At this time, the holes provided in the substrate 13 are inserted into the positioning ribs 21 provided on the housing 11 side. Thereby, it is possible to prevent the displacement between the sound guide hole 17 of the substrate 13 and the sound receiving hole 15 of the housing 11. Further, by fitting the substrate holder 20 into the claw portion provided on the housing 11, the substrate 13 can be fixed while being pushed from the back direction. The substrate holder 20 and the housing 11 are fixed with the fixing screw S, and the assembly process is completed.

[0055] The assembly is manual. If the hole 19 of the elastic member 12 is too small, due to variations due to differences among workers, variations during work, variations in the dimensions of the hole 19 of the elastic member 12, etc., displacement occurs between the sound receiving hole 15 of the housing 11, the sound guide hole 17 of the substrate 13, and the hole 19 of the elastic member 12 during assembly, the sound path is blocked, the sound cannot enter the microphone 14, and there is a risk of not recognizing the voice.

[0056] However, according to the present invention, since the hole 19 of the elastic member 12 can be made larger to a certain extent, in the above manufacturing method, even if the assembly process is manual, mass production of a microphone unit device without defects can be achieved.

[0057] 〔Summary〕 〔Aspect 1〕 An electronic device according to an aspect of the present invention includes a housing in which a sound receiving hole for guiding sound outside the housing into the housing is formed, a substrate disposed in the housing and on which a microphone is mounted, and an elastic member disposed so as to fill a gap between the inner wall of the housing other than the periphery of the sound receiving hole and the substrate so that a space is formed between the inner wall of the housing around the sound receiving hole and the substrate, and a space occupying member disposed so as to occupy a part of the space. According to the above configuration, since the volume of the space is reduced by the space occupying member arranged to occupy a part of the space, the acoustic characteristics of the device can be improved. In addition, since it is not necessary to reduce the size of the sound receiving hole and the elastic member, alignment is easy in the production process.

[0058] 〔Aspect 2〕 In the electronic device according to one aspect of the present invention, the space occupying member may be formed to protrude from the inner wall of the housing toward the space. According to the above configuration, since the space occupying member can be integrally formed with the housing, the production cost of the electronic device can be suppressed.

[0059] 〔Aspect 3〕 In the electronic device according to one aspect of the present invention, the space occupying member is annular, and the inner diameter of the space occupying member coincides with the outer diameter of the sound receiving hole. According to the above configuration, the volume of the space occupying member can be increased, and the acoustic effect of sound collection can be improved.

[0060] 〔Aspect 4〕 In the electronic device according to one aspect of the present invention, the space occupying member is annular, and the inner diameter of the space occupying member is larger than the outer diameter of the sound guiding hole. According to the above configuration, workability can be improved when the sound receiving hole is drilled later.

[0061] 〔Aspect 5〕 In the electronic device according to one aspect of the present invention, the space occupying member is arranged so as to surround a part of the sound receiving hole. According to the above configuration, workability can be improved when the sound receiving hole is drilled later.

[0062] 〔Aspect 6〕 In the electronic device according to one aspect of the present invention, the space has a polygonal shape when viewed from the normal direction of the housing, and the outer edge of the space occupying member has a polygonal shape when viewed from the normal direction of the housing. According to the above configuration, by making the space-occupying member polygonal, the volume of the space-occupying member can be increased. As a result, the volume of the space can be reduced, and the acoustic effect of sound collection can be improved.

[0063] 〔Aspect 7〕 In the electronic device according to one aspect of the present invention, a plurality of sound receiving holes are provided, and holes are formed in the space-occupying member at positions corresponding to the respective sound receiving holes. According to the above configuration, the area of the space can be relatively reduced.

[0064] 〔Aspect 8〕 In the electronic device according to one aspect of the present invention, a plurality of sound receiving holes are provided, the space-occupying member is annular, and the inner edge of the space-occupying member is outside the outer edge of the sound receiving holes. According to the above configuration, the area of the space can be relatively reduced.

[0065] 〔Aspect 9〕 The electronic device according to one aspect of the present invention may include a second space-occupying member arranged so as to occupy a part of the sound receiving holes. According to the above configuration, by providing the second space-occupying member, the volume of the entire space can be further reduced, and the acoustic characteristics of sound collection can be improved.

[0066] 〔Aspect 10〕 In the electronic device according to one aspect of the present invention, the space-occupying member may be arranged on the space side of the substrate. According to the above configuration, since the space-occupying member can be formed as a separate body from the housing and the substrate, the arrangement position, shape, size, etc. of the space-occupying member can be freely designed. In addition, since only the space-occupying member needs to be redesigned and neither the housing nor the substrate needs to be modified, the manufacturing process can be simplified. 〔Aspect 11〕 In the electronic device according to one aspect of the present invention, the space-occupying member may be formed so as to protrude from the substrate toward the space. According to the above configuration, since the space-occupying member can be integrally formed with the substrate, the production cost of the electronic device can be suppressed.

[0067] 〔Aspect 12〕 In order to solve the above problems, in an electronic device according to an aspect of the present invention, the microphone is disposed on the surface of the substrate opposite to the space, and a plurality of sound guiding holes penetrating from the surface of the substrate on the space side to the surface on the microphone side are formed in the substrate. According to the above configuration, since the microphone 14 can be mounted on the same side of the substrate as other components, no components are mounted on the space side of the substrate 13, so that one side of the substrate 13 can be made flat and closely adhered to the inner surface of the housing 11 with a minimum distance and without a gap, the volume of the space can be reduced, and the acoustic characteristics of sound collection can be improved.

[0068] 〔Aspect 13〕 In order to solve the above problems, in an electronic device according to an aspect of the present invention, the microphone is disposed on the space side of the substrate. According to the above configuration, since it is not necessary to form sound guiding holes in the substrate, the production process can be simplified.

[0069] 〔Aspect 14〕 In an electronic device according to an aspect of the present invention, a housing in which a first sound receiving hole group and a second sound receiving hole group for guiding sound outside the housing into the housing are formed, a substrate disposed in the housing and on which a first microphone for receiving sound from the first sound receiving hole group and a second microphone for receiving sound from the second sound receiving hole group are mounted, a first elastic member disposed so as to fill a gap between the inner wall of the housing around the first sound receiving hole group and the substrate so that a first space is formed between them, a second elastic member disposed so as to fill a gap between the inner wall of the housing other than around the first sound receiving hole group and the substrate so that a second space is formed between the inner wall of the housing around the second sound receiving hole group and the substrate, a first space occupying member disposed so as to occupy a part of the first space, and a second space occupying member disposed so as to occupy a part of the second space, wherein any one of the arrangement positions, shapes of the first space occupying member and the second space occupying member, volumes of the first space and the second space, and the number of sound receiving holes included in the first sound receiving hole group and the second sound receiving hole group is different. According to the above configuration, by changing the structure around the two microphones, it is possible to improve the acoustic characteristics of sound collection for both near and far sounds from the electronic device.

[0070] 〔Aspect 15〕 In a TV receiver according to an aspect of the present invention, a housing in which a sound receiving hole for guiding sound outside the housing into the housing is formed, a substrate disposed in the housing and on which a microphone is mounted, an elastic member disposed so as to fill a gap between the inner wall of the housing around the sound receiving hole and the substrate so that a space is formed between them, and a space occupying member disposed so as to occupy a part of the space. According to the above configuration, the same effect as that of the electronic device is achieved.

[0071] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope indicated in the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention.

Explanation of Reference Numerals

[0072] 1 TV receiver (electronic device) 10 Microphone unit device 11 Housing 12 Elastic member 13 Substrate 14 Microphone 15 Sound receiving hole 16, 161, 162, 163, 164 Space occupying member 17 Sound guiding hole 19 Hole (of elastic member) 20 Substrate holder 21 Positioning rib

Claims

1. A housing in which an annular sound receiving hole for guiding sound outside the housing into the housing is formed, a substrate disposed in the housing and having a microphone mounted thereon, an elastic member disposed so as to fill a gap between the inner wall of the housing other than the periphery of the sound receiving hole and the substrate so that a space is formed between the inner wall of the housing around the sound receiving hole and the substrate, a space occupying member disposed so as to occupy a part of the space and comprising, the sound receiving hole is located directly above the microphone, the elastic member has an annular hole, and an inner diameter of the hole of the elastic member is larger than an inner diameter of the sound receiving hole, the space occupying member is located outside the sound receiving hole and inside the elastic member, the housing includes ribs for positioning the elastic member characterized by an electronic device.

2. The space occupying member is formed to protrude from the inner wall of the housing toward the space characterized by the electronic device according to claim 1.

3. The space occupying member is annular, an inner diameter of the space occupying member coincides with an outer diameter of the sound receiving hole characterized by the electronic device according to claim 1 or 2.

4. The space occupying member is annular, an inner diameter of the space occupying member is larger than an outer diameter of the sound receiving hole characterized by the electronic device according to claim 1 or 2.

5. The space occupying member is disposed so as to surround a part of the sound receiving hole characterized by the electronic device according to claim 1 or 2.

6. The space has a polygonal shape when viewed from the normal direction of the housing, an outer edge of the space occupying member has a polygonal shape when viewed from the normal direction of the housing characterized by the electronic device according to claim 1 or 2.

7. A plurality of sound receiving holes are provided in the housing, holes are formed in the space occupying member at positions corresponding to the respective sound receiving holes characterized by the electronic device according to claim 1 or 2.

8. A plurality of sound receiving holes are provided in the housing, the space occupying member is annular, an inner edge of the space occupying member is outside an outer edge of the sound receiving hole characterized by the electronic device according to claim 1 or 2.

9. Comprising a second space occupying member disposed so as to occupy a part of the sound receiving hole characterized by the electronic device according to any one of claims 1 to 8.

10. The space occupying member is disposed on the space side of the substrate characterized by the electronic device according to any one of claims 1 to 9.

11. The space occupancy member is formed to protrude from the substrate toward the space. The electronic device according to any one of claims 1 to 9, characterized in that.

12. The microphone is disposed on a surface of the substrate opposite to the space, and a sound guiding hole penetrating from the surface of the substrate on the space side to the surface on the microphone side is formed in the substrate. The electronic device according to any one of claims 1 to 11, characterized in that.

13. The inner diameter of the sound guiding hole is smaller than the inner diameter of the sound receiving hole. The electronic device according to claim 12, characterized in that.

14. The microphone is disposed on the space side of the substrate. The electronic device according to any one of claims 1 to 11, characterized in that.

15. A housing in which a first sound receiving hole group and a second sound receiving hole group for guiding sound outside the housing into the housing are formed, a substrate disposed in the housing and having a first microphone for receiving sound from the first sound receiving hole group and a second microphone for receiving sound from the second sound receiving hole group mounted thereon, a first elastic member disposed so as to fill a gap between the inner wall of the housing other than the periphery of the first sound receiving hole group and the substrate so that a first space is formed between the inner wall of the housing around the first sound receiving hole group and the substrate, a second elastic member disposed so as to fill a gap between the inner wall of the housing other than the periphery of the second sound receiving hole group and the substrate so that a second space is formed between the inner wall of the housing around the second sound receiving hole group and the substrate, a first space occupancy member disposed so as to occupy a part of the first space, a second space occupancy member disposed so as to occupy a part of the second space, comprising: An electronic device, characterized in that any one of the arrangement positions, shapes of the first space occupancy member and the second space occupancy member, the volumes of the first space and the second space, and the number of sound receiving holes included in the first sound receiving hole group and the second sound receiving hole group is different.

16. A housing in which a first sound receiving hole group and a second sound receiving hole group for guiding sound outside the housing into the housing are formed, a substrate disposed in the housing and having a first microphone for receiving sound from the first sound receiving hole group and a second microphone for receiving sound from the second sound receiving hole group mounted thereon, A first elastic member disposed to fill a gap between an inner wall of the housing and the substrate other than around the first sound receiving hole group so that a first space is formed between the inner wall of the housing around the first sound receiving hole group and the substrate; A second elastic member disposed to fill a gap between an inner wall of the housing and the substrate other than around the second sound receiving hole group so that a second space is formed between the inner wall of the housing around the second sound receiving hole group and the substrate; A first space occupying member disposed to occupy a part of the first space; A second space occupying member disposed to occupy a part of the second space; Comprising; A television receiver, wherein any one of the arrangement positions, shapes of the first space occupying member and the second space occupying member, the volumes of the first space and the second space, and the number of sound receiving holes included in the first sound receiving hole group and the second sound receiving hole group is different.

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