Loudspeaker device and installation structure thereof

Abstract

A speaker device (21) is provided with: a speaker unit (30); and a support mechanism (40) that elastically supports the speaker unit (30) on the interior member (10), the support mechanism (40) including: a first fixing portion (41) that is fixed to the interior member (10); a second fixing portion (42) fixed to the interior member (10); and a support section (43) that elastically connects the speaker unit (30) to the first fixing section (41) and the second fixing section (42), the speaker unit (30) being positioned between the first fixing section (41) and the second fixing section (42) when viewed in the direction of the central axis (Z), and a straight line passing through the first fixing section (41) and the second fixing section (42) being orthogonal to the central axis (Z) of the speaker unit (30).

Description

Technical Field

[0001] This invention relates to a loudspeaker device and its configuration. Background Technology

[0002] Various structures have been proposed for mounting speaker devices on structures such as the interior of automobiles (hereinafter referred to as "exterior structures"). For example, Patent Document 1 discloses a structure in which a mounting component fixed to the exterior structure and the conical portion of the speaker unit are connected by a leaf spring.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2022-123478 Summary of the Invention

[0004] In the structure of Patent Document 1, the speaker unit is supported over its entire circumference, thus limiting the miniaturization of the speaker device when viewed from the direction of the central axis. Considering the above, one objective of the present invention is to miniaturize the speaker device when viewed from the direction of the central axis.

[0005] To address the above issues, one aspect of the present invention relates to a loudspeaker device comprising: a loudspeaker unit; and a support mechanism that elastically supports the loudspeaker unit to an external structure, the support mechanism comprising: a first fixing portion fixed to the external structure; a second fixing portion fixed to the external structure; and a support portion that elastically connects the loudspeaker unit to the first fixing portion and the second fixing portion, the loudspeaker unit being located between the first fixing portion and the second fixing portion when viewed in the direction of a central axis.

[0006] One aspect of the present invention relates to a loudspeaker device having an external structure; and a loudspeaker device disposed on the external structure, the loudspeaker device comprising: a loudspeaker unit; and a support mechanism that elastically supports the loudspeaker unit on the external structure, the support mechanism comprising: a first fixing portion fixed to the external structure; a second fixing portion fixed to the external structure; and a support portion that elastically connects the loudspeaker unit to the first fixing portion and the second fixing portion, the loudspeaker unit being located between the first fixing portion and the second fixing portion when viewed in the direction of a central axis. Attached Figure Description

[0007] Figure 1 This is an example of the installation of the audio system according to the first embodiment.

[0008] Figure 2 It is an exploded perspective view of the interior components and speaker assembly.

[0009] Figure 3This is a top view of the loudspeaker unit.

[0010] Figure 4 yes Figure 3 A cross-sectional view along line IV-IV.

[0011] Figure 5 It is an explanatory diagram relating to the positional relationships of the various elements of a loudspeaker unit.

[0012] Figure 6 This is an explanatory diagram for Scale 1.

[0013] Figure 7 It is an enlarged cross-sectional view of the vicinity of the audio sealing component.

[0014] Figure 8 This is a cross-sectional view used to illustrate the effects of the first embodiment.

[0015] Figure 9 This is a cross-sectional view of the loudspeaker device according to the second embodiment.

[0016] Figure 10 This is an enlarged cross-sectional view of the vicinity of the acoustic sealing member in the second embodiment.

[0017] Figure 11 This is a cross-sectional view used to illustrate the effects of the second embodiment.

[0018] Figure 12 This is a cross-sectional view of the loudspeaker device according to the third embodiment. Detailed Implementation

[0019] A: Implementation Method 1

[0020] Figure 1 This is an example of the installation of the audio system 100 according to the first embodiment. The audio system 100 of the first embodiment is, for example, an in-vehicle audio system installed in a vehicle C such as an automobile. Specifically, the audio system 100 is configured as a roof console installed in the roof of the vehicle C.

[0021] The audio system 100 of the first embodiment includes an interior trim component 10, a speaker device 21, and a microphone 22. The interior trim component 10 is a structure constituting the interior of the vehicle C. The interior trim component 10 of the first embodiment includes a base portion 11. The base portion 11 is a plate-shaped portion including an exterior surface S1. The exterior surface S1 is a surface facing the inside of the vehicle C. The speaker device 21 and the microphone 22 are disposed on the surface opposite to the exterior surface S1 (hereinafter referred to as "disposing surface S2") in the interior trim component 10. The interior trim component 10 of the first embodiment is an example of an "exterior structure".

[0022] The speaker device 21 radiates sound into the vehicle C. For example, in addition to music playback, various other sounds, such as emergency announcements to passengers (driver or other passengers) or guidance messages for the driver, are also radiated from the speaker device 21. The microphone 22 picks up the voices of the passengers in the vehicle C. For example, voice commands from passengers for operating information devices within the vehicle C are picked up by the microphone 22. Furthermore, while the first embodiment uses only one speaker device 21 and one microphone 22 for convenience, two or more speaker devices 21 and two or more microphones 22 may also be used.

[0023] Figure 2 This is an exploded perspective view of the interior trim component 10 and the speaker unit 21. Figure 3 This is a top view of the internal components and speaker assembly 21. Figure 4 yes Figure 3 A cross-sectional view along line IV-IV. Furthermore, in Figure 2 and Figure 3 In the middle, grid lines were applied to the area of ​​the elastic plate 44 for convenience.

[0024] Furthermore, in the following description, for convenience, we envision the central axis Z of the loudspeaker device 21 and the XY plane orthogonal to the central axis Z. One direction along the X-axis will be labeled as the X1 direction, and the direction opposite to the X1 direction will be labeled as the X2 direction. Similarly, one direction along the Y-axis will be labeled as the Y1 direction, and the direction opposite to the Y1 direction will be labeled as the Y2 direction.

[0025] Additionally, one direction along the central axis Z will be designated as the Z1 direction, and the opposite direction will be designated as the Z2 direction. The Z1 direction is the direction towards the interior of the vehicle C. Specifically, the Z1 direction is the front side (front side) of the speaker unit 21, and the Z2 direction is the rear side (rear side) of the speaker unit 21. Furthermore, from now on, any element of the audio system 100 viewed along the central axis Z will be designated as "top view".

[0026] like Figure 1 and Figure 2 As illustrated, a sound-emitting hole 12 is formed in the base 11 of the interior trim component 10. The sound-emitting hole 12 is an opening through which sound waves radiated from the speaker device 21 pass. The sound-emitting hole 12 is formed into a generally circular outline by a plurality of through holes arranged parallel to each other. Alternatively, the sound-emitting hole 12 may be composed of a plurality of dot-shaped through holes arranged in a planar manner.

[0027] like Figure 2 and Figure 4As illustrated, the interior trim component 10, in addition to the base 11 described above, includes a first support 131, a second support 132, and a protrusion 14. The first support 131, the second support 132, and the protrusion 14 protrude from the mounting surface S2 on the side opposite to the exterior surface S1 of the base 11 in the Z2 direction.

[0028] The interior trim component 10 is formed from various resin or metal materials. Specifically, the interior trim component 10 is a molded part obtained by injection molding integrally forming a base portion 11, a first support portion 131, a second support portion 132, and a protrusion 14. In the first embodiment, as described above, the first support portion 131, the second support portion 132, and the protrusion 14 protrude from the mounting surface S2 in the Z2 direction. Therefore, by separating one of the pair of molding dies used for molding the interior trim component 10 relative to the other in the Z1 or Z2 direction, the interior trim component 10 can be easily molded.

[0029] The first support portion 131 and the second support portion 132 are cylindrical portions protruding from the mounting surface S2 in the Z2 direction. The first support portion 131 and the second support portion 132 are spaced apart from each other in the X-axis direction. Specifically, when viewed from above, the sound hole 12 is located between the first support portion 131 and the second support portion 132. The shape and dimensions of the first support portion 131 and the second support portion 132 are common. For example, the height of the first support portion 131 and the height of the second support portion 132 are equal. Furthermore, the shapes of the first support portion 131 and the second support portion 132 are arbitrary, for example, they can be prismatic.

[0030] The protrusion 14 is a cylindrical portion that protrudes from the mounting surface S2 in the Z2 direction. Specifically, the protrusion 14 is formed into a ring that surrounds the sound hole 12. When viewed from above, the protrusion 14 is located between the first support portion 131 and the second support portion 132. The height of the protrusion 14 is less than the height of the first support portion 131 and the second support portion 132.

[0031] like Figure 2 and Figure 4 As illustrated, the loudspeaker device 21 includes a loudspeaker unit 30, a support mechanism 40, and an acoustic sealing member 50. Specifically, the central axis Z is the central axis of the loudspeaker unit 30. Hereinafter, the various elements constituting the loudspeaker device 21 of the first embodiment will be described in detail.

[0032] [Speaker Unit 30]

[0033] The loudspeaker unit 30 is a sound reproduction device that radiates sound waves based on audio signals supplied from external devices such as amplifiers (not shown). For example... Figure 4As illustrated, the loudspeaker unit 30 of the first embodiment includes a diaphragm 31, a drive mechanism 32, and a support frame 33. Furthermore, for convenience, illustrations of the wiring for supplying audio signals to the loudspeaker unit 30 are omitted.

[0034] The vibrating plate 31 is a vibrating body that generates sound waves through vibration. Specifically, the vibrating plate 31 is a cone-shaped structure with the diameter of its end in the Z1 direction being larger than the diameter of its end in the Z2 direction. The vibrating plate 31 is manufactured, for example, by curing a resin material impregnated with a fiber substrate. Furthermore, the shape of the vibrating plate 31 is arbitrary, for example, it can be dome-shaped (hemispherical). A cylindrical spool 35 is provided on the inner periphery of the vibrating plate 31. The opening at the Z1 direction end of the spool 35 is sealed by a central cap 36.

[0035] The drive mechanism 32 causes the vibrating plate 31 to vibrate in the direction of the central axis Z according to the audio signal. Sound waves are radiated through the vibration of the vibrating plate 31. The central axis Z also refers to the axis along the direction of vibration of the vibrating plate 31. Figure 4 As illustrated, the drive mechanism 32 of the first embodiment includes a magnetic circuit 37 and a voice coil 38. The magnetic circuit 37 is disposed in the Z2 direction (i.e., the back side) of the vibrating plate 31 to generate a magnetic field. The voice coil 38 is wound around a spool 35 within the magnetic field generated by the magnetic circuit 37.

[0036] The magnetic circuit 37 has a yoke 371, a central magnetic pole 372, and a magnet 373. The yoke 371 is a disk-shaped magnetic body arranged concentrically with the central axis Z. The central magnetic pole 372 is a cylindrical magnetic body protruding from the yoke 371 in the Z1 direction and located inside the spool 35. The magnet 373 is formed into a ring surrounding the central magnetic pole 372.

[0037] The support frame 33 is a structure that supports the vibrating plate 31 and the magnetic circuit 37. The support frame 33 is formed, for example, of a metal material or a resin material. The support frame 33 of the first embodiment includes a first part 331 and a second part 332. The first part 331 is a cylindrical frame that houses the magnetic circuit 37.

[0038] The second part 332 supports the diaphragm 31. Specifically, the second part 332 is a frustum-shaped cylindrical structure that surrounds the diaphragm 31. That is, the diameter of the end in the Z1 direction of the second part 332 (hereinafter referred to as the "sound-emitting part 34") is larger than the diameter of the end in the Z2 direction of the second part 332. The sound-emitting part 34 is an annular portion that surrounds the opening O through which sound waves radiated by the diaphragm 31 pass. As understood from the above description, the loudspeaker unit 30 of the first embodiment has a sound-emitting part 34 that surrounds the opening O through which sound waves pass.

[0039] The outer periphery of the diaphragm 31 is connected to the inner periphery of the sound-emitting section 34 via an annular edge 391. Furthermore, the inner periphery of the diaphragm 31 is connected to the inner wall surface of the second part 332 via an annular damper 392. The edge 391 and the damper 392 are formed of an elastic material.

[0040] [Supporting Institutions 40]

[0041] Figure 2 The support mechanism 40 elastically supports the speaker unit 30 to the structure of the interior trim component 10. According to this structure, the transmission of vibrations caused by the sound emission operation of the speaker unit 30 to the interior trim component 10 is suppressed. For example, the transmission of vibrations of the speaker unit 30 to the microphone 22 via the interior trim component 10 is suppressed. Furthermore, the sound emission operation is the operation of the speaker unit 30 that radiates sound waves through the vibration of the diaphragm 31.

[0042] like Figures 2 to 4 As illustrated, the support mechanism 40 of the first embodiment has a first fixing part 41, a second fixing part 42, and a support part 43. The first fixing part 41 and the second fixing part 42 are fixed to the interior trim component 10. The first fixing part 41 is fixed to the first support part 131 of the interior trim component 10. Specifically, the first fixing part 41 is fixed to the top surface of the first support part 131 by a fastening tool 81. The second fixing part 42 is fixed to the second support part 132 of the interior trim component 10. Specifically, the second fixing part 42 is fixed to the top surface of the second support part 132 by a fastening tool 82. The fastening tool 81 and the fastening tool 82 are, for example, screws or bolts. The first fixing part 41 and the second fixing part 42 are provided spaced apart from each other in the X-axis direction.

[0043] The support portion 43 is a structure that elastically connects the speaker unit 30 to the first fixing portion 41 and the second fixing portion 42. The speaker unit 30 is positioned at the center of the support portion 43 when viewed from above. The end of the support portion 43 in the X1 direction is fixed to the first fixing portion 41, and the end of the support portion 43 in the X2 direction is connected to the second fixing portion 42. Therefore, when viewed from above, the speaker unit 30 is located between the first fixing portion 41 and the second fixing portion 42. That is, when viewed from above, the first fixing portion 41 is located in the X1 direction of the speaker unit 30, and the second fixing portion 42 is located in the X2 direction of the speaker unit 30. According to... Figure 2 and Figure 4 As understood, when viewed from the side in the Y direction orthogonal to the central axis Z, the speaker unit 30 is also located between the first fixing part 41 and the second fixing part 42.

[0044] Figure 5 This is an explanatory diagram relating to the position of speaker unit 30. For example... Figure 5As illustrated, the straight line L passing through the first fixing part 41 and the second fixing part 42 is orthogonal to the central axis Z of the speaker unit 30. The straight line L passes through the center of gravity of the first fixing part 41 and the center of gravity of the second fixing part 42. According to the above structure, the speaker unit 30 can be supported with good balance between the first fixing part 41 and the second fixing part 42.

[0045] As explained above, in the first embodiment, the speaker unit 30 is elastically supported between the first fixing part 41 and the second fixing part 42. That is, the speaker unit 30 is supported on the interior trim component 10 at two locations. Therefore, for example, compared to the method where the support mechanism 40 supports the speaker unit 30 over the entire circumference, it has the advantage of easily achieving miniaturization of the speaker device 21 when viewed from above.

[0046] like Figures 2 to 4 As illustrated, the support portion 43 of the first embodiment includes an elastic plate 44 and a mounting member 45. The elastic plate 44 is formed, for example, of an elastic material with a low modulus of elasticity, such as rubber or an elastomer. For example, the elastic plate 44 is formed of a material with a lower modulus of elasticity than the interior trim part 10. The first fixing portion 41 and the second fixing portion 42 are formed of a material with higher rigidity than the elastic plate 44. The mounting member 45 is also similarly formed of a material with higher rigidity than the elastic plate 44. The first fixing portion 41, the second fixing portion 42, and the mounting member 45 are, for example, formed of the same type of resin material. The elastic plate 44 is formed of a material with a lower modulus of elasticity than the resin material constituting the first fixing portion 41, the second fixing portion 42, and the mounting member 45.

[0047] The elastic plate 44 is a plate-shaped component comprising a first surface F1 and a second surface F2. The first surface F1 and the second surface F2 are surfaces located on opposite sides of each other. Specifically, the first surface F1 is the surface facing the Z1 direction (lower surface), and the second surface F2 is the surface facing the Z2 direction (upper surface).

[0048] The elastic plate 44 is formed as an elongated strip along the X-axis. The end of the elastic plate 44 in the X1 direction is connected to the first fixing part 41, and the end of the elastic plate 44 in the X2 direction is connected to the second fixing part 42. The elastic plate 44 is connected to the first fixing part 41 and the second fixing part 42 such that its thickness direction is along the central axis Z of the speaker unit 30. Furthermore, the thickness direction of the elastic plate 44 is the direction of the normal to either the first surface F1 or the second surface F2.

[0049] A circular opening 46 is formed in the center of the elastic plate 44 when viewed from above. The mounting member 45 is connected to the elastic plate 44 in a manner that overlaps with the opening 46 when viewed from above. The mounting member 45 is formed as a long strip along the Y-axis. The ends of the mounting member 45 in the Y1 direction and the Y2 direction are connected to the elastic plate 44. That is, the mounting member 45 is suspended from the opening 46 of the elastic plate 44. As understood from the above description, the long side direction (X-axis direction) of the elastic plate 44 and the long side direction (Y-axis direction) of the mounting member 45 are orthogonal to each other.

[0050] The support mechanism 40 in the first embodiment is, for example, a molded part formed by injection molding. Specifically, the first fixing part 41, the second fixing part 42, the elastic plate 44, and the mounting member 45 are integrally formed, for example, by two-color molding. That is, firstly, the first fixing part 41, the second fixing part 42, and the mounting member 45 are formed using a first resin material, and then the elastic plate 44 is formed using a second resin material of a different type than the first resin material.

[0051] For example, the first fixing part 41 and the elastic plate 44 are fixed by filling the material of the elastic plate 44 into the plurality of mounting holes H1 formed in the first fixing part 41. Similarly, the second fixing part 42 and the elastic plate 44 are fixed by filling the material of the elastic plate 44 into the plurality of mounting holes H2 formed in the second fixing part 42. In addition, the mounting part 45 and the elastic plate 44 are fixed by filling the material of the elastic plate 44 into the plurality of mounting holes H3 formed in the mounting member 45.

[0052] The speaker unit 30 is fixed to the mounting member 45, for example, by fastening tools 83 such as screws or bolts. Specifically, the back of the speaker unit 30 is fixed to the mounting member 45 with the sound output section 34 facing the Z1 direction. That is, the speaker unit 30 is suspended from the mounting member 45.

[0053] exist Figure 5 The middle figure shows the center of gravity G of the speaker unit 30. The center of gravity G is located further in the Z2 direction than the first surface F1 of the elastic plate 44. Specifically, in the direction of the central axis Z, the center of gravity G is located between the first surface F1 and the second surface F2 of the elastic plate 44. For example, the center of gravity G is located on the intermediate plane M, which is equidistant from the first surface F1 and the second surface F2. Furthermore, the center of gravity G is located inside the opening 46 when viewed from above.

[0054] Figure 6 This is a cross-sectional view of the shape of the loudspeaker unit 30, with its center of gravity G offset in the Z1 direction relative to the first surface F1 (hereinafter referred to as "Comparative Example 1"). For example... Figure 6As illustrated, in Comparative Example 1, a significant torque acts on the speaker unit 30 (center of gravity G) centered between the first surface F1 and the second surface F2 of the elastic plate 44. Therefore, in Comparative Example 1, as... Figure 6 As illustrated by the dashed arrow, the speaker unit 30 is prone to swaying relative to the central axis Z. In contrast to Comparative Example 1, in the first embodiment, the center of gravity G of the speaker unit 30 is located between the first surface F1 and the second surface F2 of the elastic plate 44. Therefore, compared to Comparative Example 1, the swaying (head-shaking) of the speaker unit 30 can be suppressed.

[0055] As explained above, the support mechanism 40 elastically supports the speaker unit 30. Therefore, the speaker unit 30 is configured to vibrate in the direction of the central axis Z or a direction orthogonal to the central axis Z (hereinafter referred to as the "vibration configuration"). In the vibration configuration of the first embodiment, the resonant frequency fz of the vibration generated in the direction of the central axis Z is less than the lowest resonant frequency f0 of the speaker unit 30 (fz < f0). The lowest resonant frequency f0 is the lower limit of the frequency that the speaker unit 30 can play.

[0056] In the case where the resonant frequency fz of the vibrating structure is greater than the lowest resonant frequency f0 (hereinafter referred to as "Comparative Example 2"), when the speaker unit 30 radiates acoustic components near the lowest resonant frequency f0, excessive vibration in the direction of the central axis Z may occur in the vibrating structure. In contrast to Comparative Example 2, in the first embodiment, the resonant frequency fz of the vibrating structure is less than the lowest resonant frequency f0 of the speaker unit 30. Therefore, even when the speaker unit 30 radiates acoustic components near the lowest resonant frequency f0, excessive vibration in the direction of the central axis Z can be reduced.

[0057] Furthermore, in the vibration structure of the first embodiment, the resonant frequency fxy of the vibration generated in the direction orthogonal to the central axis Z is 70 Hz or more, and more preferably 100 Hz or more (fxy ≥ 100 Hz).

[0058] The vehicle C of the automobile in which the speaker device 21 of the first embodiment is installed is prone to vibration. The vibration generated in the vehicle C is transmitted to the speaker device 21. On the other hand, the components of vibration generated in the vehicle C that are 10 Hz or higher are sufficiently attenuated by the suspension of the vehicle C. In the first embodiment, the resonant frequency fxy of the vibration structure in the direction orthogonal to the central axis Z is set to 70 Hz or higher. The higher the frequency of the vibration component, the higher the attenuation rate. Therefore, according to the first embodiment, excessive vibration of the vibration structure caused by vibration from the vehicle C can be effectively suppressed. The above-described effect is even more pronounced according to the structure in which the resonant frequency fxy is set to 100 Hz or higher.

[0059] [Audio Sealing Component 50]

[0060] Figure 2 The acoustic sealing member 50 seals the gap between the interior trim component 10 and the speaker unit 30. By sealing the gap with the acoustic sealing member 50, leakage of sound waves radiated from the speaker unit 30 from the gap between the sound output section 34 and the interior trim component 10 is suppressed. The acoustic sealing member 50 is an annular component along the sound output section 34. The acoustic sealing member 50 is concentrically arranged with the sound output section 34.

[0061] like Figure 2 and Figure 4 As illustrated, the acoustic sealing component 50 includes a mounting portion 51 and an encapsulation portion 52. The acoustic sealing component 50 is, for example, a molded part obtained by injection molding, integrally forming the mounting portion 51 and the encapsulation portion 52. The acoustic sealing component 50 is, for example, formed of an elastic material such as rubber or an elastomer. Furthermore, in the following description, the direction of the circumference of a virtual circle of arbitrary diameter centered on the central axis Z is denoted as "circumferential direction," and the direction of the radius of the virtual circle is denoted as "radial direction."

[0062] The mounting portion 51 is an annular portion fixed to the sound-emitting portion 34. A groove 511 along the circumference is formed on the inner circumferential surface of the mounting portion 51 over its entire circumference. The mounting portion 51 is disposed on the sound-emitting portion 34 by receiving the sound-emitting portion 34 into the groove 511. Furthermore, the structure for fixing the mounting portion 51 to the sound-emitting portion 34 is arbitrary and not limited to the example shown above. The encapsulation portion 52 is an annular portion that protrudes radially inward from the mounting portion 51. That is, the encapsulation portion 52 extends inward from the inner circumferential surface of the mounting portion 51.

[0063] Figure 7 This is an enlarged cross-sectional view of the vicinity of the acoustic sealing component 50. Figure 7 The document records both the state before the speaker device 21 is installed on the interior trim component 10 (hereinafter referred to as the "uninstalled state") and the state after the speaker device 21 is installed on the interior trim component 10 (hereinafter referred to as the "installed state"). Figure 7 As illustrated, the unset package portion 52 is in a state parallel to the XY plane.

[0064] like Figure 7As illustrated, in the installed state, the top surface of the protrusion 14 contacts the lower surface of the encapsulation portion 52 over the entire circumference of the opening O. The encapsulation portion 52 of the acoustic sealing member 50 is elastically deformed by being pressed in the Z2 direction by the protrusion 14. Specifically, the encapsulation portion 52 is curved in the Z2 direction from the outer periphery to the inner periphery. As described above, by the contact between the acoustic sealing member 50 and the protrusion 14 of the interior trim member 10, an acoustic seal is achieved, sealing the gap between the sound output section 34 and the interior trim member 10. That is, leakage of radiated sound from the speaker unit 30 from the gap between the speaker unit 30 and the interior trim member 10 is suppressed.

[0065] In addition, such as Figure 7 As illustrated, the outer periphery of the top surface of the protrusion 14 is R-shaped (chamfered). Based on this structure, localized stress concentration on the package portion 52 caused by the protrusion 14 is alleviated. Therefore, damage to the package portion 52 caused by contact with the protrusion 14 can be suppressed.

[0066] As explained above, in the first embodiment, the encapsulation portion 52 of the acoustic sealing member 50 is elastically deformed by being pressed by the protrusion 14. That is, the acoustic sealing member 50 elastically deforms according to the change in the positional relationship between the protrusion 14 and the speaker unit 30. Therefore, the transmission of vibrations from the speaker unit 30 to the interior trim member 10 can be suppressed. Specifically, the rigidity of the acoustic sealing member 50 is lower than that of the speaker unit 30, thus suppressing vibrations transmitted from the acoustic sealing member 50 to the protrusion 14. As mentioned above, the rigidity of the acoustic sealing member 50 is sufficiently low compared to that of the speaker unit 30. Furthermore, the reason for the lower rigidity of the acoustic sealing member 50 is not only due to its being formed of a material with a low modulus of elasticity, but also due to the cantilever beam structure formed by the protrusion 14, the speaker unit 30, and the acoustic sealing member 50.

[0067] Furthermore, the acoustic sealing member 50 elastically deforms in conjunction with the change in the gap between the sound-emitting section 34 and the protrusion 14, thereby maintaining the contact between the protrusion 14 and the acoustic sealing member 50. Therefore, leakage of sound waves from the gap between the sound-emitting section 34 and the interior trim member 10 can be effectively suppressed.

[0068] Furthermore, in the first embodiment, the encapsulation portion 52 protrudes radially inward from the mounting portion 51 fixed to the sound-emitting portion 34, and the protrusion 14 of the interior trim component 10 contacts the encapsulation portion 52. Therefore, compared to the method where the portion that contacts the protrusion 14 protrudes radially outward from the mounting portion 51, the size of the speaker device 21 when viewed in the direction of the central axis Z can be reduced.

[0069] However, the exterior surface S1 of the base portion 11 in the interior component 10 protrudes towards the inside of the vehicle C. Therefore, the shape of the base portion 11 is usually designed with aesthetic considerations for the exterior surface S1 rather than the arrangement of the speaker unit 21 relative to the base portion 11. Based on the above, the shape of the base portion 11 can be varied for each model of the vehicle C. For example, as... Figure 8 As illustrated, in addition to the first embodiment (structure A) in which the base portion 11 is a flat plate perpendicular to the central axis Z, it is also conceivable that the base portion 11 is inclined relative to the central axis Z in structure B, or that the base portion 11 is curved in structure C.

[0070] In the first embodiment, the acoustic sealing member 50 is elastically deformed by pressure from the protrusion 14, therefore... Figure 8 As illustrated, regardless of the shape of the base portion 11, the acoustic sealing member 50 can contact the protrusion 14. That is, even when a common speaker device 21 is provided for interior trim parts 10 with different shapes, an acoustic seal can be effectively maintained. As understood from the above description, the first embodiment has the advantage of being able to fully ensure the design freedom of the interior trim parts 10.

[0071] Furthermore, the acoustic sealing member 50 elastically deforms due to the pressure from the protrusion 14, thus effectively maintaining an acoustic seal even when a common speaker device 21 is provided for multiple interior trim parts 10 with different diameters of the protrusion 14. That is, according to the first embodiment, the speaker device 21 can be used for multiple interior trim parts 10 with different shapes of the protrusion 14.

[0072] B: Implementation Method 2

[0073] The second embodiment will be described. Furthermore, in the embodiments illustrated below, elements that function the same as in the first embodiment will be referred to by the same reference numerals as in the first embodiment, and detailed descriptions of each will be omitted as appropriate.

[0074] Figure 9 This is a cross-sectional view of the audio system 100 according to the second embodiment. In the second embodiment, the shape of the audio sealing member 50 differs from that of the first embodiment. Specifically, the audio sealing member 50 of the second embodiment is the same as the audio sealing member 50 of the first embodiment with the addition of an inner peripheral portion 53. The inner peripheral portion 53 is integrally formed with the mounting portion 51 and the encapsulation portion 52, for example, by injection molding of a resin material.

[0075] Figure 10 This is an enlarged cross-sectional view of the vicinity of the acoustic sealing component 50. (Example) Figure 9 and Figure 10As illustrated, the inner peripheral portion 53 is the portion of the acoustic sealing member 50 that is continuous with the inner peripheral edge of the encapsulation portion 52. The inner peripheral portion 53 is formed in a ring shape along the inner peripheral edge of the encapsulation portion 52 over its entire circumference. In addition, the inner peripheral portion 53 forms an angle with respect to the encapsulation portion 52. Specifically, the inner peripheral portion 53 is orthogonal to the encapsulation portion 52.

[0076] like Figure 10 As illustrated, in the uninstalled state, the encapsulation portion 52 is parallel to the XY plane, similar to the first embodiment. In the uninstalled state, the inner peripheral portion 53 protrudes from the inner peripheral edge of the encapsulation portion 52 in a direction along the central axis Z. Specifically, the inner peripheral portion 53 protrudes from the inner peripheral edge of the encapsulation portion 52 toward the side opposite to the speaker unit 30. It can also be configured such that the inner peripheral portion 53 protrudes from the inner peripheral edge of the encapsulation portion 52 toward the interior trim component 10.

[0077] The thickness of the inner peripheral portion 53 is the same as the thickness of the packaging portion 52. However, it is also conceivable that the thickness of the inner peripheral portion 53 is greater than the thickness of the packaging portion 52, or that the thickness of the inner peripheral portion 53 is less than the thickness of the packaging portion 52. Furthermore, the width W2 of the inner peripheral portion 53 is less than the width W1 of the packaging portion 52. Additionally, the width W1 of the packaging portion 52 is its radial dimension, and the width W2 of the inner peripheral portion 53 is its dimension in the direction of the central axis Z of the inner peripheral portion 53.

[0078] In the configured state, similar to the first embodiment, the top surface of the protrusion 14 contacts the lower surface of the encapsulation portion 52 over the entire circumference of the opening O. The mounting portion 51 of the audio sealing member 50 is elastically deformed in a curved shape by being pressed in the Z2 direction by the protrusion 14. Therefore, in the second embodiment, also similar to the first embodiment, an audio seal is achieved to seal the gap between the sound output portion 34 and the interior trim portion 10.

[0079] The structure other than the acoustic sealing member 50 is the same as in the first embodiment. Therefore, the second embodiment also achieves the same effect as the first embodiment. Furthermore, in the second embodiment, by providing an inner peripheral portion 53 on the inner periphery of the encapsulation portion 52, the mechanical strength of the inner periphery of the encapsulation portion 52 is strengthened. Therefore, compared to the first embodiment, the expansion of the inner diameter of the encapsulation portion 52 when pressed by the protrusion 14 is suppressed. That is, the restoring force of the encapsulation portion 52 against the pressing of the protrusion 14 is enhanced. With the above structure, the sealing performance between the protrusion 14 and the encapsulation portion 52 is improved, and as a result, according to the second embodiment, a more effective acoustic seal can be achieved than in the first embodiment.

[0080] Furthermore, a resonance space is formed between the encapsulation portion 52 of the acoustic sealing component 50 and the diaphragm 31 of the speaker unit 30, with the inner side of the inner periphery 53 serving as the neck, in which Helmholtz resonance can be generated. Therefore, the acoustic characteristics of the radiated sound can be adjusted according to the characteristics (e.g., elasticity) and size of the inner periphery 53.

[0081] In the first embodiment, the inner peripheral portion 53 protrudes from the inner peripheral edge of the encapsulation portion 52 toward the side opposite to the speaker unit 30. According to the above structure, as the protrusion 14 presses against the encapsulation portion 52 and approaches its inner peripheral side, the movement of the protrusion 14 relative to the encapsulation portion 52 is as follows: Figure 11 As illustrated, the protrusion 14 stops upon contact with the inner peripheral portion 53. Therefore, it is possible to prevent the protrusion 14 from reaching the inside of the encapsulation portion 52. That is, the inner peripheral portion 53 functions as a limiter to prevent the protrusion 14 from reaching the inside of the encapsulation portion 52. Furthermore, the inner peripheral portion 53 forms a duct shape at the air inlet / outlet (opening O) relative to the space inside the sound-emitting portion 34, thereby ensuring smooth airflow and reducing bagpipe noise.

[0082] C: Third Implementation Method

[0083] Figure 12 This is a cross-sectional view of the audio system 100 according to the third embodiment. The speaker unit 30 of the third embodiment, in addition to the elements identical to those in the first embodiment, also has a first wrist 61 and a second wrist 62. The first wrist 61 and the second wrist 62 are connected to a support frame 33 (specifically, the first part 331). The first wrist 61 protrudes from the support frame 33 in the X1 direction, and the second wrist 62 protrudes from the support frame 33 in the X2 direction. That is, the support frame 33 is located between the first wrist 61 and the second wrist 62.

[0084] In the third embodiment, the support mechanism 40 of the first embodiment is replaced with Figure 12 The support mechanism 70 is a structure that elastically supports the speaker unit 30 to the interior trim component 10. Therefore, similar to the first embodiment, the transmission of vibrations caused by the sound emission operation of the speaker unit 30 to the interior trim component 10 is suppressed.

[0085] The support mechanism 70 of the third embodiment includes a first fixing part 71, a second fixing part 72, a support part 73, and a connecting part 74. The first fixing part 71 and the second fixing part 72 are fixed to the interior trim component 10. Specifically, the first fixing part 71 is fixed to the top surface of the first support part 131. The second fixing part 72 is fixed to the top surface of the second support part 132. The connecting part 74 connects the first fixing part 71 and the second fixing part 72. The first fixing part 71 is located in the X1 direction of the connecting part 74, and the second fixing part 72 is located in the X2 direction of the connecting part 74. Furthermore, the connecting part 74 may be omitted. It is also contemplated that the first fixing part 71 includes the first support part 131, or that the second fixing part 72 includes the second support part 132.

[0086] The support portion 73 is a structure that elastically connects the speaker unit 30 to the first fixing portion 71 and the second fixing portion 72. Specifically, the support portion 73 has a first guide portion 731, a second guide portion 732, a first upper spring 75a, a first lower spring 75b, a second upper spring 76a, and a second lower spring 76b.

[0087] The first guide portion 731 is a columnar portion spanning the lower surface of the first fixing portion 71 and the mounting surface S2 of the base portion 11. Similarly, the second guide portion 732 is a columnar portion spanning the lower surface of the second fixing portion 72 and the mounting surface S2 of the base portion 11. The first guide portion 731 is inserted through a through hole formed in the first wrist portion 61 of the speaker unit 30. The second guide portion 732 is inserted through a through hole formed in the second wrist portion 62 of the speaker unit 30. Therefore, the speaker unit 30 is located between the first guide portion 731 and the second guide portion 732 when viewed from above. The first guide portion 731 and the second guide portion 732 are guide members that restrict the movement of the speaker unit 30 in the XY plane.

[0088] The first upper spring 75a is located between the first fixing part 71 and the first wrist part 61, and the first lower spring 75b is located between the first wrist part 61 and the base part 11. Similarly, the second upper spring 76a is located between the second fixing part 72 and the second wrist part 62, and the second lower spring 76b is located between the second wrist part 62 and the base part 11. Therefore, when the speaker unit 30 moves in the Z2 direction, an elastic force in the Z1 direction acts from the support part 73, and when the speaker unit 30 moves in the Z1 direction, an elastic force in the Z2 direction acts from the support part 73. That is, the support mechanism 70 of the third embodiment suppresses the movement of the speaker unit 30 in the Z direction of the central axis.

[0089] According to Figure 12As understood, when viewed from above, the speaker unit 30 is located between the first fixing part 71 and the second fixing part 72. That is, when viewed from above, the first fixing part 71 is located in the X1 direction of the speaker unit 30, and the second fixing part 72 is located in the X2 direction of the speaker unit 30.

[0090] As explained above, in the third embodiment, similar to the first embodiment, the speaker unit 30 is supported on the interior trim component 10 at two locations. Therefore, for example, compared to the method where the support mechanism 70 supports the speaker unit 30 over the entire circumference, it is easier to achieve miniaturization of the speaker device 21 when viewed from above.

[0091] D: Variation Example

[0092] The following examples illustrate specific variations of the methods illustrated above. Two or more methods selected from the examples below may be appropriately combined, provided they do not contradict each other.

[0093] (1) In the foregoing embodiments, the sound-emitting section 34 is shown to be annular (especially circular), but the top view shape of the sound-emitting section 34 is not limited to the above examples. For example, it is also conceivable that the sound-emitting section 34 is an elliptical or oblong annular shape. In addition, it is also conceivable that the sound-emitting section 34 is a polygonal frame shape. As can be understood from the above examples, the sound-emitting section 34 can be a top view shape that surrounds the opening O through which the sound waves radiated from the speaker unit 30 pass.

[0094] (2) In the aforementioned embodiments, the encapsulation portion 52 of the acoustic sealing member 50 is shown to protrude radially inward from the mounting portion 51, but the encapsulation portion 52 may also protrude radially outward from the mounting portion 51. The protrusion 14 is formed to have a larger diameter than the mounting portion 51, so as to contact the encapsulation portion 52.

[0095] (3) In the foregoing embodiments, a structure is shown where the center of gravity G is located between the first surface F1 and the second surface F2 of the elastic plate 44, but the position of the center of gravity G is not limited to the above examples. Specifically, a structure is also envisioned where the center of gravity G is located in the Z1 direction further than the first surface F1. For example, a structure is shown where the center of gravity G is located near the first surface F1 (or the second surface F2) to a degree that can substantially suppress the swaying of the speaker unit 30. In further detail, a structure is preferred where the center of gravity G is located near the first surface F1 (or the second surface F2) to a degree that the resonant frequency related to the swaying of the speaker unit 30 reaches 100Hz or more.

[0096] (4) In the aforementioned embodiments, an example is shown where a speaker device 21 is provided in the interior component 10 of the vehicle C, but the structure (external structure) for providing the speaker device 21 is not limited to the interior component 10.

[0097] (5) In the foregoing embodiments, a structure in which the support mechanism 40 is fixed to the first support portion 131 and the second support portion 132 is shown. In the above structure, the speaker unit 30 is supported at two points relative to the interior trim component 10. However, the construction for supporting the speaker unit 30 is not limited to the above examples. For example, the speaker unit 30 may be supported at three points relative to the interior trim component 10.

[0098] (6) Among the aforementioned methods, the following structures A and B are shown. • Structure A: The acoustic sealing member 50 along the sound-emitting section 34 of the speaker unit 30 is elastically deformed by being pressed by the protrusion 14. • Structure B: The structure of the speaker unit 30 located between the first fixing part 41 (71) and the second fixing part 42 (72) when viewed from above.

[0099] Structure A and structure B are structures that can be established independently. Therefore, for one structure A or structure B, the other is not a necessary element.

[0100] For example, in the audio system 100 employing structure A, structure B is not necessary. Specifically, for structure A, the structure used to support the speaker unit 30 is arbitrary. Similarly, in the audio system 100 employing structure B, structure A is not necessary. Specifically, for structure B, the presence or absence and structure of the acoustic sealing member 50 are arbitrary.

[0101] E: Appendix

[0102] Based on the examples above, understand the following structures.

[0103] One aspect (Aspect 1) of the present invention relates to a loudspeaker device comprising: a loudspeaker unit; and a support mechanism that elastically supports the loudspeaker unit to an external structure, the support mechanism comprising: a first fixing portion fixed to the external structure; a second fixing portion fixed to the external structure; and a support portion that elastically connects the loudspeaker unit to the first fixing portion and the second fixing portion, the loudspeaker unit being located between the first fixing portion and the second fixing portion when viewed in the direction of a central axis. In the above aspect, the loudspeaker unit is elastically supported between the first fixing portion and the second fixing portion. Therefore, for example, compared to a method where the support mechanism supports the loudspeaker unit over a full circumference, miniaturization of the loudspeaker device when viewed in the direction of a central axis is easily achieved.

[0104] In a specific example of Method 1 (Method 2), the straight line passing through the first fixing part and the second fixing part is orthogonal to the central axis of the speaker unit. According to the above method, the speaker unit can be supported with good balance between the first fixing part and the second fixing part.

[0105] In a specific example of Method 1 or Method 2 (Method 3), the support includes an elastic plate whose thickness direction is along the central axis of the speaker unit. The elastic plate has a first surface and a second surface opposite to each other, and the center of gravity of the speaker unit is located between the first surface and the second surface in the direction of the central axis. In the above methods, the center of gravity of the speaker unit is located between the first surface and the second surface in the direction of the central axis. Therefore, compared to methods where the center of gravity of the speaker unit deviates from the range between the first surface and the second surface, it is possible to suppress the swaying (head-shaking) of the speaker unit.

[0106] In any specific example of Methods 1 to 3 (Method 4), in the vibration structure constituted by the loudspeaker unit and the support mechanism, the resonant frequency of the vibration in the direction of the central axis is lower than the lowest resonant frequency of the loudspeaker unit. In the above methods, the resonant frequency of the vibration in the direction of the central axis of the vibration structure is lower than the lowest resonant frequency (f0) of the loudspeaker unit. Therefore, excessive vibration in the direction of the central axis of the vibration structure can be effectively suppressed.

[0107] In any specific example (Example 5) of Methods 1 to 4, the resonant frequency of the vibration in the vibrating structure formed by the speaker unit and the support mechanism is 100 Hz or higher in the direction orthogonal to the central axis. If we consider the case where the speaker device is installed on a moving body, such as a car, the vibration from the moving body (components above 10 Hz) is sufficiently attenuated by the suspension of the moving body. Therefore, by ensuring that the resonant frequency of the vibration in the vibrating structure in the direction orthogonal to the central axis is 100 Hz or higher, excessive vibration of the vibrating structure caused by vibration from the moving body can be effectively suppressed.

[0108] In any specific example of methods 1 to 5 (method 6), an acoustic sealing member is further provided. The speaker unit includes a sound-emitting portion surrounding an opening through which sound waves pass. The acoustic sealing member is disposed along the sound-emitting portion and is elastically deformed by being pressed by a protrusion that protrudes from the mounting surface of the outer structure and surrounds the sound-emitting hole of the outer structure. In the above methods, an acoustic seal is achieved by contacting the acoustic sealing member along the sound-emitting portion with the protrusion of the outer structure, thus sealing the gap between the sound-emitting portion and the outer structure. That is, leakage of radiated sound from the speaker unit from the gap between the speaker unit and the outer structure is suppressed.

[0109] One aspect of the invention (Aspect 7) relates to a configuration comprising: an external structure; and a speaker device disposed on the external structure, the speaker device comprising: a speaker unit; and a support mechanism that elastically supports the speaker unit on the external structure, the support mechanism comprising: a first fixing portion fixed to the external structure; a second fixing portion fixed to the external structure; and a support portion that elastically connects the speaker unit to the first fixing portion and the second fixing portion, the speaker unit being located between the first fixing portion and the second fixing portion when viewed in the direction of the central axis.

[0110] Explanation of the label

[0111] 100… Audio system, 10… Interior trim, 11… Base, 12… Sound hole, 131… First support, 132… Second support, 14… Protrusion, 21… Speaker assembly, 22… Microphone, 30… Speaker unit, 31… Vibrating plate, 32… Drive mechanism, 33… Support frame, 331… First part, 332… Second part, 34… Sound output section, 35… Spool, 36… Center cover, 37… Magnetic circuit, 38… Voice coil, 40… Support mechanism, 41… First fixing part, 42… Second fixing part, 43… Support part, 44…elastic plate, 45…mounting part, 46…opening, 50…audio sealing part, 51…mounting part, 52…encapsulation part, 53…inner circumference part, 61…first wrist, 62…second wrist, 70…support mechanism, 71…first fixing part, 72…second fixing part, 73…support part, 731…first guide part, 732…second guide part, 74…connecting part, 75a…first upper spring, 75b…first lower spring, 76a…second upper spring, 76b…second lower spring, 81, 82, 83…fastening tools.

Claims

1. A loudspeaker device comprising: loudspeaker unit; and A support mechanism that elastically supports the speaker unit to the external structure. The support mechanism includes: The first fixing part is fixed to the external structure; A second fixing part, which is fixed to the external structure; and A support portion that elastically connects the speaker unit to the first fixing portion and the second fixing portion. The speaker unit is located between the first fixing part and the second fixing part when viewed in the direction of the central axis. The straight line passing through the first fixing part and the second fixing part is orthogonal to the central axis of the speaker unit.

2. The loudspeaker device according to claim 1, wherein, The support includes an elastic plate, the thickness of which is along the central axis of the speaker unit. The elastic plate has a first surface and a second surface that are opposite to each other. In the direction of the central axis, the center of gravity of the speaker unit is located between the first surface and the second surface.

3. The loudspeaker device according to claim 1, wherein, In the vibration structure consisting of the loudspeaker unit and the support mechanism, the resonant frequency of the vibration in the direction of the central axis is lower than the lowest resonant frequency of the loudspeaker unit.

4. The loudspeaker device according to claim 1, wherein, In the vibration structure consisting of the loudspeaker unit and the support mechanism, the resonant frequency of the vibration in the direction orthogonal to the central axis is 70 Hz or higher.

5. The loudspeaker device according to claim 1, wherein, It also has a sound sealing component. The loudspeaker unit includes a sound-emitting section that surrounds an opening through which sound waves pass. The acoustic sealing component is disposed along the sound-emitting portion and is elastically deformed by being pressed by the protrusion, which protrudes from the mounting surface of the outer structure and surrounds the sound-emitting hole of the outer structure.

6. A loudspeaker device configuration comprising: External constructs; as well as A loudspeaker assembly, which is disposed on the external structure, The loudspeaker device includes: loudspeaker unit; as well as A support mechanism that elastically supports the speaker unit to the external structure. The support mechanism includes: The first fixing part is fixed to the external structure; A second fixing part, which is fixed to the external structure; and A support portion that elastically connects the speaker unit to the first fixing portion and the second fixing portion. When viewed in the direction of the central axis, the speaker unit is located between the first fixing part and the second fixing part, and the straight line passing through the first fixing part and the second fixing part is orthogonal to the central axis of the speaker unit.

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