Speaker device

Abstract

This speaker device comprises: a speaker that outputs sound by vibrating a diaphragm; and a facing member that is disposed so as to face forward of the speaker in the direction of sound generation by the diaphragm. The facing member has a frame-shaped outer frame section and one or more bridge sections laterally spanning the interior of the outer frame section. The outer frame section and the bridge sections form a plurality of opening sections that penetrate through the facing member along the direction of sound generation. When the facing member is viewed along the direction of sound generation, in the opening sections, at least some opening edges formed by the bridge sections have a curved shape.

Description

Speaker device

[0001] The present invention relates to a speaker device.

[0002] Conventionally, speaker devices have been known that include a speaker that generates sound by vibrating a diaphragm. In this regard, Patent Document 1 discloses a speaker device in which multiple cover parts are arranged in front of the speaker in the sound-producing direction, and the widths formed between the front and rear cover parts are non-uniform. Another example of a speaker device in which a structure (component) is arranged in front of the speaker in the sound-producing direction is a coaxial speaker device in which two speakers with different diameters are arranged side by side in the sound-producing direction. In a coaxial speaker device, for example, a tweeter, which is a speaker for reproducing high frequencies and has a smaller diameter than the woofer, is arranged in front of a woofer, which is a speaker for reproducing low frequencies, and the tweeter is supported by a support member made of, for example, resin.

[0003] Japanese Patent Application Laid-Open No. 2020-96214

[0004] In the above-mentioned speaker device, since a structure disposed in front of the speaker acts as an obstacle to sound, the structure usually has an opening formed therein to allow the sound emitted from the speaker to pass forward in the sound generation direction. However, when sound is generated from the speaker, diffracted waves diffracted by the edge of the opening interfere with the straight waves passing through the opening, causing large peaks and dips at specific frequencies and potentially impairing the sound quality of the speaker.

[0005] The present invention has been made to solve such problems, and an object of the present invention is to provide a technique capable of suppressing the occurrence of peak dips in a speaker device.

[0006] In order to solve the above problems, the present invention employs the following measures. Specifically, the present invention provides a speaker device including a speaker having a diaphragm that vibrates the diaphragm to output sound, and an opposing member disposed facing the speaker in front of the speaker in the sound generation direction of the speaker. The opposing member has a frame-shaped outer frame portion and one or more bridge portions that span the inside of the outer frame portion, and the outer frame portion and the bridge portions form a plurality of openings that penetrate the opposing member along the sound generation direction. When the opposing member is viewed along the sound generation direction, at least a portion of the opening edges formed by the bridge portions in the openings are curved.

[0007] According to the present invention, by making at least a part of the opening edge formed by the bridge portion curved, it is possible to disperse the timing and wavelength of interference between the diffracted wave diffracted by the curved opening edge and the straight wave passing through the opening, thereby suppressing the occurrence of peak-dip.

[0008] FIG. 1 is an overall perspective view of a speaker device according to an embodiment. FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1. FIG. 3 is a plan view of a support member according to an embodiment. FIG. 4 is a cross-sectional view of a bridge portion according to an embodiment. FIG. 5 is a diagram for schematically explaining sound interference in the speaker device according to an embodiment. FIG. 6 is a diagram for schematically explaining sound interference in a speaker device according to a comparative example. FIG. 7 is a plan view of a support member according to a first modified example. FIG. 8 is a plan view of a support member according to a second modified example. FIG. 9 is a plan view of a support member according to a third modified example. FIG. 10 is a plan view of a support member according to a fourth modified example. FIG. 11 is a plan view of a support member according to a fifth modified example.

[0009] As an example of an embodiment of the present invention, a speaker device in which the present invention is applied, in which multiple speakers are arranged in a line in the sound-emitting direction, will be described below with reference to the drawings. However, the embodiment described below is an example for carrying out the present invention, and the present invention is not limited to the embodiment described below. A speaker device according to the present invention may include two or more speakers, or may include only one speaker. Furthermore, the type of speaker according to the present invention is not particularly limited, and speakers of various sound-emitting types, such as cone type, dome type, and horn type, can be used.

[0010] [Overall Configuration] Fig. 1 is an overall perspective view of a speaker device 100 according to an embodiment. Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1. Hereinafter, the direction in which sound is output from a woofer 1, which is a speaker designated by the reference numeral 1, is referred to as the "sound generation direction," and is indicated by an arrow in Fig. 2 and other figures. The sound generation direction coincides with the direction in which the axis of the woofer 1 extends (axial direction). Furthermore, the direction moving in the same direction as the sound generation direction is referred to as the "forward (front side)," and the direction moving in the opposite direction to the sound generation direction is referred to as the "rear (rear side)." Fig. 2 illustrates a cross section along the sound generation direction.

[0011] The speaker device 100 according to this embodiment is configured as a so-called coaxial speaker in which multiple speakers (two in this example) with different diameters are arranged in the sound-producing direction. Specifically, as shown in FIGS. 1 and 2 , the speaker device 100 includes a woofer 1 (an example of a "speaker" and a "first speaker" according to the present invention) that is a large-diameter speaker that outputs sounds ranging from low to high frequencies, and a tweeter 2 (an example of a "second speaker" according to the present invention) that is a small-diameter speaker that outputs high-frequency sounds and is arranged alongside the woofer 1 in the sound-producing direction of the woofer 1. The tweeter 2 has a smaller diameter than the woofer 1 and is arranged in front of the woofer 1 in the sound-producing direction. In the speaker device 100, an axis CL1 of the woofer 1 and an axis CL2 of the tweeter 2 extend along the sound-producing direction, and the axis CL1 and the axis CL2 are coincident with each other. That is, in this embodiment, the woofer 1 and the tweeter 2 are arranged coaxially. However, the present invention is not limited to this, and it is not essential that the first speaker and the second speaker be arranged coaxially. The speaker device 100 further includes a support member 3 that supports the tweeter 2. The speaker device 100 is, for example, an in-vehicle speaker that is embedded in a dashboard or the like and is installed in a vehicle. However, the use of the speaker device according to the present invention is not particularly limited. Each component of the speaker device 100 will be described below.

[0012] [Woofer] The woofer 1 is configured as a so-called cone-type speaker using a conical diaphragm 17. As shown in Fig. 2, the woofer 1 has a frame 11, a yoke 12, a plate 13, a magnet 14, a voice coil 15, a damper 16, a diaphragm 17, a center cap 18, and an audio signal input terminal (not shown). The woofer 1 generates sound by acting a magnetic field generated by a magnetic circuit 10 including the magnet 14 on the voice coil 15, causing the diaphragm 17 to vibrate back and forth in the sound-generating direction.

[0013] The frame 11 has a cylindrical portion 111 that widens forward in a multi-step tapered manner and a bottom portion 112 that closes the rear end of the cylindrical portion 111. A through-hole 112a is formed in the center of the bottom portion 112. The frame 11 may also have an opening for allowing air pushed out when the diaphragm 17 or the like vibrates to escape rearward. The opening may be formed, for example, in the cylindrical portion 111. The yoke 12 is a member made of a magnetic material and is disposed at the rear of the frame 11. The yoke 12 has a cylindrical center pole 121 that extends along the sound-producing direction and a disk-shaped base 122 that protrudes radially outward from the rear end of the center pole 121. The plate 13 is an annular member made of a magnetic material and is fixed to the bottom portion 112 of the frame 11. The center pole 121 is inserted through the plate 13, forming a gap between the plate 13 and the center pole 121. The magnet 14 is formed in an annular shape and is disposed between the plate 13 and the base 122 of the yoke 12. A center pole 121 is inserted through the magnet 14. The yoke 12, the plate 13, and the magnet 14 constitute a magnetic circuit 10. The voice coil 15 extends along the sound-generating direction. The rear end of the voice coil 15 is inserted into the gap between the center pole 121 and the plate 13, and the front end is inserted into the frame 11 via the through-hole 112a. A magnetic field generated by the magnetic circuit 10 acts on the voice coil 15. The damper 16 is an elastic member with a corrugated cross section and connects the voice coil 15 and the cylindrical portion 111. The diaphragm 17 is a cone-shaped member whose diameter increases toward the front and vibrates together with the voice coil 15 to generate sound. The diaphragm 17 is disposed inside the frame 11. The rear end of the diaphragm 17 is connected to the front end of the voice coil 15, and the front end of the diaphragm 17 is connected to the front end of the cylindrical portion 111. The center cap 18 is formed in a dome shape that protrudes forward, and closes the opening at the front end of the voice coil 15.

[0014] When a voice current is applied to the voice coil 15, a driving force acts on the voice coil 15 due to an electromagnetic force excited by the voice current and the magnetic field acting on the voice coil 15 by the magnetic circuit 10. The voice coil 15, to which the driving force acts, vibrates back and forth in the sound generation direction together with the diaphragm 17 due to the elastic deformation of the damper 16. As a result, sound pressure is output (emitted) forward in the sound generation direction from the diaphragm 17, and the woofer 1 produces sound.

[0015] [Tweeter] The tweeter 2 is configured as a so-called dome-shaped speaker using a dome-shaped diaphragm 23 that is convex forward. As shown in Fig. 2, the tweeter 2 includes a magnetic circuit 21 including a magnet, a voice coil 22 on which a magnetic field generated by the magnetic circuit 21 acts, a diaphragm 23 that vibrates together with the voice coil 22 to generate high-pitched sounds, and an audio signal input terminal (not shown). The tweeter 2 is supported by a support member 3 and is positioned in front of the woofer 1, facing the central opening of the diaphragm 17. Similar to the woofer 1, the tweeter 2 generates sound by applying the magnetic field generated by the magnetic circuit 21 to the voice coil 22, causing the diaphragm 23 to vibrate back and forth in the sound-generating direction.

[0016] [Support Member] The support member 3 is a member disposed facing the front of the woofer 1 in the sound-producing direction of the woofer 1 and supporting the tweeter 2. The support member 3 is an example of a "facing member" according to the present invention. FIG. 3 is a plan view of the support member 3 according to the present embodiment. Specifically, FIG. 3 illustrates the support member 3 as viewed from the front along the sound-producing direction. As shown in FIG. 3, the support member 3 includes a frame-shaped outer frame portion 31, a holding portion 32 that holds the tweeter 2, and a plurality of bridge portions 33 that are horizontally disposed inside the outer frame portion 31, all of which are integrally formed. The support member 3 is formed, for example, from a resin material. However, the material of the facing member according to the present invention is not particularly limited. Note that, although the support member 3 according to the present embodiment has the outer frame portion 31, the holding portion 32, and the bridge portions 33 integrally formed, the support member according to the present invention may also have these components formed separately.

[0017] As shown in Fig. 3, the outer frame portion 31 is formed in an annular shape and constitutes the outer frame of the support member 3. The support member 3 is arranged such that the central axis direction of the outer frame portion 31 coincides with the sound generation direction of the woofer 1. Reference numeral 311 in Fig. 3 indicates the inner peripheral surface of the outer frame portion 31. The inner peripheral surface 311 is formed as a curved surface that is arc-shaped when viewed in the sound generation direction. As shown in Fig. 2, the outer frame portion 31 is fixed to the front end portion of the frame 11 of the woofer 1. Note that the shape of the outer frame portion 31 is not limited to annular.

[0018] As shown in FIG. 3 , the holding portion 32 is formed in an annular shape with a smaller diameter than the outer frame portion 31, and is disposed inside the outer frame portion 31. The holding portion 32 is disposed in the center of the outer frame portion 31. Reference numeral 321 in FIG. 3 indicates the outer peripheral surface of the holding portion 32. The outer peripheral surface 321 is formed as a curved surface that is arc-shaped when viewed in the sound-producing direction. As shown in FIG. 2 , the tweeter 2 is attached inside the holding portion 32. The tweeter 2 is fixed to the holding portion 32 by any means (screw fastening, crimping, etc.). In this way, the holding portion 32 holds the tweeter 2 in front of the woofer 1. Note that the shape of the holding portion 32 is not limited to an annular shape.

[0019] As shown in FIG. 3 , multiple bridge portions 33 connect the outer frame portion 31 and the retaining portion 32. When viewed in the sound-producing direction, the bridge portions 33 extend in an arc-like shape that convexly extends inward from the outer frame portion 31. In the extending direction of the bridge portions 33, both ends of the bridge portions 33 are connected to the outer frame portion 31, and the middle portion of the bridge portions 33 is connected to the retaining portion 32. In this embodiment, four bridge portions 33 are arranged at equal intervals in the circumferential direction of the outer frame portion 31. However, the shape and number of the bridge portions 33 are not limited thereto. For example, the bridge portions 33 may extend in an arc-like shape that convexly extends outward from the outer frame portion 31. In FIG. 3 , reference numeral 331 denotes an inner peripheral surface of the bridge portion 33, and reference numeral 332 denotes an outer peripheral surface of the bridge portion 33. The inner peripheral surface 331 and the outer peripheral surface 332 constitute both side surfaces of the bridge portion 33 and are formed as curved surfaces that form an arc-like shape when viewed in the sound-producing direction.

[0020] Here, FIG. 4 is a cross-sectional view of the bridge portion 33 according to the embodiment. FIG. 4 illustrates a cross section perpendicular to the extension direction of the bridge portion 33. Here, with respect to the bridge portion 33, the direction perpendicular to the extension direction of the bridge portion 33 and the sound-producing direction of the woofer 1 (i.e., the front-to-rear direction) is defined as the width direction of the bridge portion 33. In FIG. 4, reference numeral 333 indicates the front surface of the bridge portion 33 in the sound-producing direction, and reference numeral 334 indicates the rear surface of the bridge portion 33 in the sound-producing direction. The front surface 333 and the rear surface 334 of the bridge portion 33 are connected via an inner peripheral surface 331 and an outer peripheral surface 332. In the speaker device 100, the rear surface 334, which faces the diaphragm 17 of the woofer 1, is formed as a flat surface without grooves or ribs.

[0021] As shown in FIG. 4 , the side surfaces (inner peripheral surface 331 and outer peripheral surface 332) of the bridge portion 33 are inclined with respect to the sound generation direction so that the bridge portion 33 widens toward the front in the sound generation direction. Specifically, the inner peripheral surface 331, which is one side surface of the bridge portion 33, has a tapered surface 3311 and a straight surface 3312, and the outer peripheral surface 332, which is the other side surface of the bridge portion 33, has a tapered surface 3321 and a straight surface 3322. The tapered surfaces 3311 and 3321 are connected to the rear surface 334 and are inclined with respect to the sound generation direction so that the bridge portion 33 widens toward the front. The straight surfaces 3312 and 3322 connect the tapered surfaces 3311 and 3321 to the front surface 333 and extend along the sound generation direction. The bridge portion 33 is narrowest at the rear surface 334 and gradually widens toward the front in the sound generation direction. The cross-sectional shape of the bridge portion 33 is not limited to the above, and may have either a straight surface or a tapered surface.

[0022] Here, the thickness dimension of the bridge portion 33 in the sound-producing direction is defined as a1, and the width dimension of the bridge portion 33 is defined as a2. The bridge portion 33 according to this embodiment is formed so that a2<a1. In other words, the thickness of the bridge portion 33 is greater than the width. However, the present invention is not limited to this, and a2≧a1 may also be satisfied.

[0023] As shown in Fig. 3, the support member 3 has a plurality of openings 4A, 4B formed by the outer frame portion 31, the holding portion 32, and the bridge portion 33. The openings 4A, 4B penetrate the support member 3 along the sound generation direction so that sound output from the woofer 1 can pass through. The opening 4A is formed as a space surrounded by the outer frame portion 31 and the bridge portion 33. In other words, the opening 4A is formed inside the bridge portion 33. The opening 4B is also formed as a space surrounded by the outer frame portion 31, the holding portion 32, and the bridge portions 33, 33 that are adjacent to each other in the circumferential direction of the outer frame portion 31.

[0024] As shown in FIG. 3 , the opening 4A has opening edges 4A1 and 4A2, which are peripheral edges. The opening edge 4A1 is formed by the inner peripheral surface 311 of the outer frame portion 31, and the opening edge 4A2 is formed by the inner peripheral surface 331 of the bridge portion 33. Therefore, the opening edges 4A1 and 4A2 are curved (specifically, arc-shaped) when viewed in the sound-producing direction. The opening 4B has opening edges 4B1, 4B2, and 4B3, which are peripheral edges. The opening edge 4B1 is formed by the inner peripheral surface 311 of the outer frame portion 31, the opening edge 4B2 is formed by the outer peripheral surface 332 of the bridge portion 33, and the opening edge 4B3 is formed by the outer peripheral surface 321 of the holding portion 32. Therefore, the opening edges 4B1, 4B2, and 4B3 are curved (specifically, arc-shaped) when viewed in the sound-producing direction. Therefore, the entire opening edge of the openings 4A and 4B formed in the support member 3 according to this embodiment is curved.

[0025] [Operations and Effects] As described above, the speaker device 100 according to this embodiment includes the woofer 1 that has the diaphragm 17 and vibrates the diaphragm 17 to output sound, and the support member 3 that is disposed facing the front of the woofer 1 in the sound generation direction of the woofer 1. The support member 3 has a frame-shaped outer frame portion 31 and one or more bridge portions that span the inside of the outer frame portion 31. The outer frame portion 31 and the bridge portions 33 form a plurality of openings 4A, 4B that penetrate the support member 3 along the sound generation direction, and when the support member 3 is viewed along the sound generation direction, the opening edges 4A2, 4B2 formed by the bridge portions 33 at the openings 4A, 4B have curved shapes.

[0026] By forming at least a part of the opening edges 4A2, 4B2 formed by the bridge portion 33 into a curved shape, it is possible to disperse the time and wavelength at which the diffracted waves diffracted by the curved opening edges interfere with the straight waves passing through the opening, thereby suppressing the occurrence of peak-dip.

[0027] FIG. 5 is a diagram for schematically explaining sound interference in the speaker device 100 according to the embodiment. FIG. 6 is a diagram for schematically explaining sound interference in a speaker device according to a comparative example. In FIGS. 5 and 6 , symbol W1 indicates a straight wave output from the woofer 1, traveling straight along the sound generation direction, and passing through the opening 4A of the support member 3. Symbol W2 indicates a diffracted wave output from the woofer 1 and diffracted by the opening edge 4B2 of the opening 4B. Symbol S1 indicates a portion where the straight wave W1 and the diffracted wave W2 interfere (interference portion). The speaker device according to the comparative example differs from the speaker device 100 according to the embodiment in that the bridge portion 330 is formed linearly. Note that FIGS. 5 and 6 are schematic diagrams illustrating an example of sound interference and are not intended to limit the present invention. The wavelength and diffraction angle of the sound are not limited to those shown in FIGS. 5 and 6 .

[0028] In the comparative example, the bridge portion 330 is linear when viewed in the sound-generating direction, so the opening edge 4B2 is linear. Therefore, as shown in FIG. 6 , the diffracted wave W2 bends around in a planar shape and interferes with the straight wave W1. At this time, as shown by the interference portion S1 in FIG. 6 , the straight wave W1 and the diffracted wave W2 interfere with each other at specific timings and wavelengths. As a result, large peaks and dips may occur at specific frequencies. In contrast, in the present embodiment, the opening edge 4B2 is curved when viewed in the sound-generating direction, so the diffracted wave W2 bends around in a curved shape and interferes with the straight wave W1 as shown in FIG. 5 . Therefore, as shown by the interference portion S1 in FIG. 5 , the interference at each frequency is shifted in time, and the timing and wavelengths at which the straight wave W1 and the diffracted wave W2 interfere are dispersed. Therefore, the speaker device 100 according to this embodiment can suppress the occurrence of peaks and dips due to the support member 3. As a result, deterioration in the sound quality of the woofer 1 can be suppressed. Furthermore, by making at least a part of the opening edges 4A2, 4B2 curved, it is possible to expect an improvement in the sense of openness in the high range, a reduction in the muffled feeling in the mid range, and an increase in the amount of sound information by filling in dips.

[0029] Although the support member 3 according to this embodiment has a plurality of bridge portions 33, the number of bridge portions according to the present invention does not have to be a plurality, and may be one or more.

[0030] Furthermore, in the speaker device 100 according to this embodiment, when the support member 3 is viewed along the sound generation direction, the opening edges 4A2, 4B2 formed by the bridge portions 33 at the openings 4A, 4B are entirely curved. This allows the diffracted waves from the opening edges 4A2, 4B2 to spread out along a curved surface overall, which more widely disperses the timing and wavelength of interference between the linear waves and the diffracted waves compared to when only a portion of the opening edges 4A2, 4B2 are curved. As a result, the occurrence of peaks and dips can be more effectively suppressed. However, in the present invention, it is not necessary for the entire opening edge formed by the bridge portions at the openings to be curved; it is sufficient that at least a portion of the opening edge be curved.

[0031] Furthermore, in the speaker device 100 according to this embodiment, when the support member 3 is viewed along the sound generation direction, the bridge portion 33 extends in an arc shape. This allows the opening edges 4A2, 4B2 formed by the bridge portion 33 to have a curved shape (arc shape in this example). However, the shape of the bridge portion according to the present invention is not limited to an arc shape. The bridge portion may extend in various curved shapes. Furthermore, the entire bridge portion does not have to be curved, and at least one of the two side surfaces of the bridge portion may be curved when viewed along the sound generation direction.

[0032] As described above, in the speaker device 100 according to this embodiment, the side surfaces (inner peripheral surface 331 and outer peripheral surface 332) of the bridge portion 33 are inclined with respect to the sound generation direction in a cross section perpendicular to the extension direction of the bridge portion 33, so that the bridge portion 33 widens toward the front in the sound generation direction. The tapered shape of the bridge portion 33 facilitates air flow along the side surfaces of the bridge portion 33 toward the front in the sound generation direction. This prevents air from stagnating between the diaphragm 17 and the bridge portion 33. As a result, sound output from the woofer 1 easily passes through the openings 4A and 4B of the support member 3, improving the sense of sound transparency. Furthermore, the rear surface 334 of the bridge portion 33 facing the diaphragm 17 is formed as a flat surface without grooves or ribs, further preventing air from stagnating. Furthermore, in this embodiment, the thickness of the bridge portion 33 is greater than the width, thereby ensuring the strength of the bridge portion 33 while improving the sense of sound transparency. Furthermore, by tapering the cross-sectional shape of the bridge portion 33, it is possible to expect an increase in the amount of information in the high-pitched range. Note that the cross-sectional shape and dimensions of the bridge portion according to the present invention are not limited to those described above.

[0033] The speaker device 100 according to this embodiment further includes a tweeter 2 arranged alongside the woofer 1 in the sound-emitting direction, and the tweeter 2 is held by a support member 3. This allows the speaker device 100 to be configured as a coaxial speaker while suppressing peaks and dips of the woofer 1. While the present embodiment illustrates the configuration in which the woofer 1 is arranged as the first speaker and the tweeter 2 is arranged as the second speaker, the present invention is not limited to this. For example, a low-frequency woofer may be arranged as the first speaker, and a mid-frequency speaker may be arranged in front of it as the second speaker, or a mid-frequency speaker may be arranged as the first speaker, and a tweeter may be arranged in front of it as the second speaker. The number of speakers is not limited to two, and may be one, or three or more. The present invention also allows at least one of the multiple speakers to be supported by an opposing member.

[0034] In the above-described embodiment, the opposing member according to the present invention is configured as a support member 3 for supporting the tweeter 2 disposed in the sound-producing direction, but the present invention is not limited to this. The opposing member according to the present invention may be any member disposed in front of and facing the speaker. The opposing member may be configured, for example, as a cover member that covers the diaphragm with a bridge portion. In this case, the cover member may be, for example, a dust cover that prevents foreign matter from entering the speaker with multiple bridge portions. Furthermore, the opposing member according to the present invention may be configured, for example, as an acoustic lens that converges or diverges the sound of the speaker with multiple fin-shaped bridge portions.

[0035] [Modifications] Modifications of the support member will be described below. In the following description, differences from the support member 3 described above will be mainly described, and the same components as those of the support member 3 will be denoted by the same reference numerals and detailed description thereof will be omitted.

[0036] 7 to 11 are plan views of support members according to modified examples. In a support member 301 according to modified example 1 shown in FIG. 7, openings 4C, 4D, and 4E are formed by the intersection of arc-shaped bridge portions 33. In a support member 302 according to modified example 2 shown in FIG. 8, four arc-shaped bridge portions 33 extend radially from the retaining portion 32, and an opening 4F is formed between adjacent bridge portions 33 in the circumferential direction. In support members 303, 304, and 305 according to modified examples 3 to 5 shown in FIGS. 9 to 11, both side surfaces of the bridge portions 33 are formed in an arc shape that convex toward each other when viewed in the sound-producing direction. In a support member 303 according to modified example 3 shown in FIG. 9, three bridge portions 33 arranged at equal intervals in the circumferential direction extend radially from the retaining portion 32, and an opening 4G is formed between adjacent bridge portions 33 in the circumferential direction. In a support member 304 according to a fourth modification shown in Fig. 10, four bridge portions 33 arranged at equal intervals in the circumferential direction extend radially from the retaining portion 32, and an opening 4H is formed between adjacent bridge portions 33, 33 in the circumferential direction. In a support member 305 according to a fifth modification shown in Fig. 11, two bridge portions 33 extend from each side of the retaining portion 32, and openings 4I and 4J are formed between adjacent bridge portions 33, 33 in the circumferential direction.

[0037] <Others> Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above-described embodiments.

[0038] [Notes] The features of the present invention are described as notes below. [1] A speaker device comprising: a speaker having a diaphragm that outputs sound by vibrating the diaphragm; and an opposing member disposed facing the speaker in front of the speaker in a sound generation direction of the speaker, wherein the opposing member has a frame-shaped outer frame portion and one or more bridge portions spanning the inside of the outer frame portion, wherein the outer frame portion and the bridge portions form a plurality of openings that penetrate the opposing member along the sound generation direction, and when the opposing member is viewed along the sound generation direction, at least a portion of the opening edge formed by the bridge portions in the openings has a curved shape. [2] The speaker device described in [1], wherein when the opposing member is viewed along the sound generation direction, the entire opening edge formed by the bridge portions in the openings has a curved shape. [3] The speaker device described in [1] or [2], wherein when the opposing member is viewed along the sound generation direction, the bridge portions extend in an arc shape. [4] The speaker device according to any one of [1] to [3], wherein a side surface of the bridge portion, in a cross section perpendicular to the extending direction of the bridge portion, is inclined with respect to the sound generation direction so that the bridge portion widens toward the front in the sound generation direction. [5] The speaker device according to any one of [1] to [4], further comprising a second speaker arranged alongside the first speaker in the sound generation direction of the first speaker, the second speaker being the speaker, and the second speaker being held by the opposing member. [6] The speaker device according to [5], wherein the first speaker and the second speaker are arranged coaxially. [7] The speaker device according to any one of [1] to [6], wherein the opposing member is configured as a cover member that covers the diaphragm with the bridge portion.

[0039] DESCRIPTION OF SYMBOLS 1 Woofer (an example of a "speaker" and a "first speaker") 2 Tweeter (an example of a "second speaker") 3 Support member (an example of a "facing member") 17 Diaphragm 31 Outer frame portion 32 Holding portion 33 Bridge portion 4A, 4B Openings 100 Speaker device

Claims

1. A speaker having a diaphragm that outputs sound by vibrating the diaphragm, The speaker comprises an opposing member positioned opposite to the speaker in the direction of sound generation, The opposing member has a frame-shaped outer frame portion and one or more bridge portions horizontally mounted inside the outer frame portion. The outer frame portion and the bridge portion form a plurality of openings that penetrate the opposing members along the sound-producing direction. When the opposing member is viewed along the sound-producing direction, at least a portion of the opening edge formed by the bridge portion in the opening is curved. Speaker device.

2. When the opposing member is viewed along the sound-producing direction, the entire opening edge formed by the bridge portion in the opening is curved in shape. The speaker device according to claim 1.

3. When the opposing member is viewed along the direction of sound production, the bridge portion extends in an arc shape. The speaker device according to claim 1.

4. The side surface of the bridge portion is inclined with respect to the sound-producing direction such that, in a cross-section perpendicular to the extending direction of the bridge portion, the bridge portion widens as it moves forward in the sound-producing direction. The speaker device according to claim 1.

5. The system further comprises a second speaker positioned alongside the first speaker in the sound-producing direction of the first speaker, The second speaker is held by the opposing member. The speaker device according to claim 1.

6. The first speaker and the second speaker are arranged coaxially. The speaker device according to claim 5.

7. The opposing member is configured as a cover member that covers the diaphragm with a plurality of bridge portions. A speaker device according to any one of claims 1 to 6.