Speaker device

Abstract

The present invention provides a speaker device equipped with an equalizer that contributes to improvement of sound pressure frequency characteristics in a high frequency region.　A speaker device (1) is provided with: a diaphragm (51) provided with an outer peripheral part (52); an outer peripheral horn (30) that surrounds the outer peripheral part (52) and extends from a lower side (X1) where sound is generated to an upper side (X2) where the sound is radiated; and an edge (53) that connects the outer peripheral horn (30) and the outer peripheral part (52). The speaker device (1) is further provided with an edge cover equalizer (60) that covers at least a portion of the upper side (X2) of the edge (53) and extends along the edge (53). A predetermined gap (S) is produced between the edge cover equalizer (60) and the outer peripheral horn (30).

Description

Speaker device 【0001】 The present invention relates to a speaker device. 【0002】 A speaker device including an equalizer that is arranged near a diaphragm and adjusts the sound pressure frequency characteristics of the generated sound is known (see, for example, Patent Documents 1 and 2). The speaker (speaker device) described in Patent Document 1 includes a pair of equalizer elements 3a and 3b (equalizer) that surround the periphery of a diaphragm 7 formed in a dome shape, as shown in FIG. 4 of Patent Document 1. The speaker device described in Patent Document 2 includes a ring-shaped equalizer 9 that covers an edge portion 7b that connects a diaphragm 7a and a frame 4 that houses the diaphragm 7a and extends in the circumferential direction, as shown in FIG. 1 of Patent Document 2. 【0003】 Japanese Patent Publication No. 55-102285 Japanese Unexamined Patent Application Publication No. 10-322792 【0004】 In the conventional speaker device as described above, for example, the sound pressure tends to decrease in a high frequency range of 10,000 Hz or more, and improvement of the sound pressure frequency characteristics is required. As an example of the problem to be solved by the present invention, there is provided a speaker device including an equalizer that contributes to improving the sound pressure frequency characteristics in a high frequency range. 【0005】 In order to solve the above problems, one aspect of the present invention is a speaker device, including a diaphragm having an outer peripheral portion, a surrounding portion that surrounds the outer peripheral portion and extends from a sound generation side where sound is generated to a sound radiation side where sound is radiated, an edge that connects the surrounding portion and the outer peripheral portion, and an edge cover equalizer that covers at least a part of the sound radiation side of the edge and extends along the edge, and a predetermined gap is formed between the edge cover equalizer and the surrounding portion. 【0006】 Further, the surrounding portion is an outer peripheral horn having an inner surface that expands in diameter toward the sound radiation side, and the predetermined gap may be formed between opposing portions where the edge cover equalizer and the outer peripheral horn are separated and face each other. 【0007】Furthermore, the edge may have a convex arc-shaped portion on the sound-emitting side, and the edge cover equalizer may have an arc-shaped umbrella portion that covers the top of the edge. 【0008】 Furthermore, the diaphragm may be formed in a dome shape that is convex toward the sound radiation side, and the edge cover equalizer may have an extension that is continuous with the umbrella portion and extends toward the sound radiation side along the outer surface of the diaphragm. 【0009】 Furthermore, the edge cover equalizer may include a first member having the umbrella portion and the extension portion, and a second member positioned at a distance from the first member and on the top side of the diaphragm. 【0010】 This is a perspective view of a speaker device according to one embodiment of the present invention. This is a cross-sectional view taken along the line A-A in Figure 1. This is an enlarged view of the main part in Figure 2. This is an enlarged view of the main part in Figure 3. (A) is a schematic diagram of a speaker device according to one embodiment of the present invention, and (B) is a schematic diagram of a conventional speaker device. These are graphs showing the analysis results of the sound pressure frequency characteristics of the speaker device according to one embodiment of the present invention and the speaker device of a comparative example, respectively. 【0011】 The following describes a speaker device according to one embodiment of the present invention. The speaker device according to one embodiment of the present invention comprises a diaphragm having an outer periphery, and an enclosure that surrounds the outer periphery and extends from the sound generation side where sound is generated to the sound radiation side where sound is radiated. The speaker device also comprises an edge connecting the enclosure and the outer periphery, and an edge cover equalizer that covers at least a portion of the edge on the sound radiation side and extends along the edge. A predetermined gap is created between the edge cover equalizer and the enclosure. By configuring it in this way, the sound pressure in the high-frequency range of the sound generated from the speaker device can be increased compared to a configuration without a predetermined gap. Therefore, it is possible to provide a speaker device equipped with an equalizer that contributes to improving the sound pressure frequency characteristics in the high-frequency range. 【0012】Furthermore, in the speaker device described above, the enclosure may be an outer horn having an inner surface that widens in diameter toward the sound radiation side, and the edge cover equalizer and the outer horn may be spaced apart, creating a predetermined gap between the opposing parts. By doing so, the horn effect of sound that passes through the gap between the edge cover equalizer and the outer horn and is conducted along the inner surface of the outer horn can be enhanced, and the sound pressure frequency characteristics in the high-frequency range described above can be further improved. 【0013】 Furthermore, in any of the speaker devices described above, the edge may have a convex arc-shaped portion on the sound-emitting side, and the edge cover equalizer may have an arc-shaped umbrella portion that covers the top of the edge. By doing so, the sound pressure frequency characteristics in the high-frequency range described above can be further improved. 【0014】 Furthermore, in the speaker device described above, the diaphragm may be formed in a dome shape that is convex toward the sound radiation side, and the edge cover equalizer may have an extension that is continuous with the umbrella portion and extends toward the sound radiation side along the outer surface of the diaphragm. By doing so, the sound pressure frequency characteristics in the high-frequency range described above can be further improved. 【0015】 Furthermore, in any of the speaker devices described above, the edge cover equalizer may include a first member having an umbrella portion and an extension portion, and a second member positioned at a distance from the first member and on the top side of the diaphragm. By doing so, the sound pressure frequency characteristics in the high-frequency range described above can be further improved. 【0016】An embodiment of the present invention will be described with reference to Figures 1 to 6. Figure 1 is a perspective view of a speaker device 1 according to an embodiment of the present invention. In the description of this embodiment, the direction along the axis a of the cylindrical portion 14, which will be described later, will be referred to as the "axial direction" and denoted by the symbol X. For convenience, one side of the axial direction X will be referred to as the "lower side" and denoted by the symbol X1. For convenience, the other side of the axial direction X will be referred to as the "upper side" and denoted by the symbol X2. As an example, the sound emitted by the speaker device 1 travels from the lower side X1 to the upper side X2. Therefore, in the description of this embodiment, the lower side X1 will be referred to as the "sound generation side" where sound is generated, and the upper side X2 will be referred to as the "sound radiation side" where sound is radiated. The direction perpendicular to the axial direction X will be referred to as the "radial direction" and denoted by the symbol Y. Note that these definitions of directions are for the convenience of explanation only and are not intended to limit the direction during the manufacture or use of the speaker device 1. Furthermore, the above definition of direction is not intended to limit the direction of sound radiation emitted by speaker device 1. 【0017】 As shown in Figure 1, the speaker device 1 comprises a case 10, a magnetic circuit section 40 housed in the case 10, a vibrating section 50 that vibrates due to the magnetic force of the magnetic circuit section 40, and an edge cover equalizer 60 that covers at least a part of the vibrating section 50. 【0018】 The case 10 is constructed using a non-magnetic material, such as resin or aluminum. As shown in Figure 2, the case 10 includes a bottom plate portion 11 positioned on the lower side X1, a cylindrical portion 14 that houses the bottom plate portion 11, and a support portion 20 positioned above the bottom plate portion 11 X2 within the cylindrical portion 14. 【0019】 The bottom plate portion 11 includes a disc-shaped base portion 12. A flange portion 13 is formed on the edge of the base portion 12, projecting radially outward in the Y direction. 【0020】 The cylindrical portion 14 covers the flange portion 13 of the bottom plate portion 11 in the circumferential direction and extends from the lower side X1 to the upper side X2. A protrusion 15 is formed on the inner surface of the cylindrical portion 14, projecting radially inward in the Y direction. The upper surface of the protrusion 15 faces the outer peripheral horn 30, which will be described later, in the axial direction X. The protruding end face of the protrusion 15 faces the support portion 20 in the radial direction Y. 【0021】The support portion 20 comprises an annular body 21. A support plate 22, made of a flat, annular thin plate, is installed on the upper surface of the body 21. The upper surface of the support plate 22 abuts against the lower surface of the edge 53 of the vibrating portion 50, which will be described later, and supports the edge 53. A first projection 23 is formed on the lower surface of the body 21, projecting downward X1. The first projection 23 is formed around the entire circumference of the axis a and surrounds the upper part of the side wall 43 of the yoke 41, which will be described later, in the circumferential direction around the axis a. A second projection 24 is formed at the radially outward end of the body 21, rising upward X2. The upper end of the second projection 24 is positioned between the inner surface of the cylindrical portion 14 and the outer surface 32 of the outer peripheral horn 30, which will be described later, in the radial direction Y. The support portion 20 formed in this way is supported by the side wall 43 by bringing the lower surface of the body 21 into contact with the upper surface of the side wall 43 of the yoke 41, which will be described later. Furthermore, the support portion 20 supports the outer periphery horn 30 via the support plate 22. 【0022】 The outer horn 30 is an acoustic tube that controls the directivity and sound pressure of the sound generated from the speaker device 1, and is formed in a tubular shape extending around axis a. The inner surface 31 of the outer horn 30 is an arc shape that widens in diameter towards the upper side X2. This inner surface 31 surrounds the outer periphery 52 of the diaphragm 51, which will be described later, in the circumferential direction, and constitutes the "enclosure" in this invention. On the other hand, the outer surface 32 of the outer horn 30 has a first vertical surface 33 that faces the inner surface of the cylindrical portion 14 in the radial direction Y, and a first horizontal surface 34 that extends radially inward from the lower end of the first vertical surface 33 and faces the upper surface of the convex portion 15 and the upper surface of the second protrusion 24 in the axial direction X. Furthermore, the outer surface 32 of the outer peripheral horn 30 includes a second vertical surface 35 extending downward X1 from the radially inward Y end of the first horizontal surface 34, and a second horizontal surface 36 extending radially inward Y perpendicular to the second vertical surface 35. The second horizontal surface 36 has an edge 53, which will be described later, sandwiched between it and the support plate 22. 【0023】The magnetic circuit section 40 comprises a yoke 41, a magnet 44 housed inside the yoke 41, and a yoke plate 45 placed on the upper surface of the magnet 44. The yoke 41 is formed in a roughly U-shape using a magnetic material such as iron (so-called paramagnetic or ferromagnetic material). Specifically, the yoke 41 comprises a disc-shaped bottom wall 42 placed on the bottom plate 11 of the case 10, and a side wall 43 rising from the edge of the bottom wall 42 to the upper side X2. The magnet 44 is a permanent magnet such as a neodymium magnet and is formed in a disc shape. The yoke plate 45 is formed in a disc shape using a magnetic material. 【0024】 A through-hole 46 is formed in the center of the yoke plate 45, penetrating in the axial direction X. With this configuration, for example, if heat is generated in the magnetic circuit section 40, the heat is mainly dissipated from the through-hole 46. The outer diameter of the yoke plate 45 is set to be smaller than the inner diameter of the side wall 43 of the yoke 41. This setting creates a gap in the radial direction Y between the end of the yoke plate 45 in the radial direction Y and the upper end of the side wall 43 of the yoke 41. This gap is a part of the magnetic circuit section 40 where magnetic flux tends to concentrate particularly easily, and in this embodiment, this part is referred to as the magnetic gap G. 【0025】 The vibrating section 50 comprises a diaphragm 51 formed in a dome shape with an upper side X2 convex, an edge 53 extending radially outward in the Y direction from the outer peripheral portion 52 that constitutes the outer surface of the diaphragm 51, and a voice coil portion 57 fixed to the diaphragm 51. The diaphragm 51 is formed using a material such as ceramic or resin. The edge 53 is the part that connects the outer peripheral portion 52 of the diaphragm 51 to the outer peripheral horn 30, and is made of a resin material, for example. 【0026】As shown in Figure 3, the edge 53 comprises a continuous portion 54 that is continuous with the outer periphery 52 of the diaphragm 51, an arc-shaped portion 55 that is continuous with the continuous portion 54 and protrudes upward X2, and a connecting portion 56 that is continuous with the arc-shaped portion 55 and extends radially outward in the Y direction. The continuous portion 54 is formed in a plate shape and extends radially outward from the outer periphery 52 of the diaphragm 51. The arc-shaped portion 55 is curved upward X2. The connecting portion 56 extends radially outward in the Y direction from the arc-shaped portion 55. The tip of the connecting portion 56 is fixed by being sandwiched in the axial direction X by the second lateral surface 36 of the outer horn 30 and the upper surface of the support plate 22. 【0027】 The voice coil section 57 comprises a cylindrical bobbin 58 extending around axis a, and a voice coil 59 wound around the bobbin 58. The upper end of the bobbin 58 is fixed to the inner surface of the diaphragm 51. The voice coil 59 is made of a metallic material such as copper wire, and a portion of it is routed through a copper wire passage T (see Figure 2) and brought out to the outside of the case 10. 【0028】 As shown in Figure 1, the edge cover equalizer 60 comprises a first member 61 formed in an annular shape, a second member 64 formed in an annular shape and spaced apart from the first member 61, and a fixing portion 65 connecting the first member 61 and the second member 64. As shown in Figure 3, the first member 61 includes an umbrella portion 62 positioned on the upper X2 of the arc-shaped portion 55 of the edge 53. The umbrella portion 62 is formed in an arc shape that is convex to the upper X2 with a radius slightly larger than that of the arc-shaped portion 55, covers the top of the arc-shaped portion 55, and extends along the arc-shaped portion 55 around axis a. That is, the umbrella portion 62 covers at least a part of the upper X2 of the edge 53 and extends along the edge 53. An extension portion 63 is continuously formed at the end of the umbrella portion 62 on the radially inward Y side. The extension portion 63 rises along the outer surface of the diaphragm 51 and is inclined to be positioned on the upper X2 as it moves radially inward Y. 【0029】 The second member 64 is composed of an annular flat plate member and is located radially inward Y than the first member 61, surrounding the area near the upper X2 of the top of the diaphragm 51 around axis a. 【0030】As shown in Figure 1, the fixing portion 65 includes a first beam portion 66 that spans in the radial direction Y, and a second beam portion 67 that connects the first member 61 and the outer periphery horn 30. The first beam portion 66 connects the first member 61 and the second member 64. The second beam portion 67 connects the first member 61 and the inner surface 31 of the outer periphery horn 30 and is fixed to the inner surface 31 of the outer periphery horn 30. As a result, the first member 61 and the second member 64 are supported in a position positioned above the diaphragm 51 and the edge 53 X2. As shown in Figure 4, a predetermined gap S is created in the radial direction Y between the edge cover equalizer 60 configured in this way and the outer periphery horn 30. 【0031】 Specifically, the gap S is created between the opposing portions 70 of the edge cover equalizer 60 and the outer peripheral horn 30, which are separated and facing each other in the radial direction Y. The size of the gap S can be set as appropriate, but it is preferable to set it within a range in which the umbrella portion 62 of the edge cover equalizer 60 can completely cover the arc-shaped portion 55 of the edge 53. For example, the size of the gap S may be about 1 to 2 mm. The shape of the gap S is determined by the shape of the end of the umbrella portion 62 on the radially outward side in the Y direction and the shape of the inner surface 31 of the outer peripheral horn 30. For example, as in this embodiment, the shape of the gap S may be set to a reduced diameter shape in which the radial Y dimension decreases as it approaches the upper side X2. Conversely, the shape of the gap S may be set to an expanded diameter shape in which the radial Y dimension increases as it approaches the upper side X2. 【0032】 The speaker device 1 configured in this way operates as follows. First, an electric current (sound current) is supplied to the voice coil 59 via the copper wire passage T shown in Figure 2. This supply of current causes a force to act on the voice coil 59 in the axial direction X according to Fleming's rule. This force causes the voice coil 59 to vibrate in the axial direction X. The vibration is transmitted to the diaphragm 51 via the bobbin 58. As the diaphragm 51 vibrates, sound is generated (radiated). The generated sound is conducted to the inner surface 31 of the outer horn 30, causing resonance, and also passes through gaps S and between the first member 61 and the second member 64 of the edge cover equalizer 60, etc., before moving upward towards X2. 【0033】Next, the sound pressure frequency characteristics of the speaker device 1 of this embodiment will be described in comparison with the speaker device 100 of the comparative example. Figure 5(A) is a schematic diagram of the speaker device 1 according to one embodiment of the present invention, and Figure 5(B) is a schematic diagram of the speaker device 100 of the comparative example (conventional speaker device). Figure 6 is a graph showing the analysis results of the sound pressure frequency characteristics of the speaker device 1 according to one embodiment of the present invention and the speaker device 100 of the comparative example, respectively. 【0034】 As shown in Figure 5(A), in the speaker device 1 of this embodiment, a radial gap S in the direction Y is created between the outer peripheral horn 30, which acts as an "enclosure" surrounding the outer peripheral portion 52 of the diaphragm 51 in the circumferential direction, and the edge cover equalizer 60, which covers the upper part of the edge 53. 【0035】 As shown in Figure 5(B), in the comparative example speaker device 100, there is no gap in the radial direction Y between the enclosure portion 300 that surrounds the outer periphery portion 552 of the diaphragm 551 in the circumferential direction and the edge cover equalizer 600 that covers the upper part of the edge 553. 【0036】 CAE analysis (simulation) was performed on speaker device 1 and speaker device 100 of the comparative example under the same conditions, and the results of the sound pressure frequency characteristics in the frequency range above 1000 Hz were obtained. In the graph of Figure 6, the horizontal axis shows Frequency (Hz), and the vertical axis shows SPL (dB). Also in the graph of Figure 6, the solid line a shows the sound pressure frequency characteristics of speaker device 100 of the comparative example. On the other hand, the dotted line b shows the sound pressure frequency characteristics of speaker device 1 of this embodiment. 【0037】 As shown in the rightmost part of the graph in Figure 6, in the comparative example speaker device 100, a peak P1 of SPL (dB) (see solid line a) can be observed at frequencies higher than 10,000 Hz, and from this peak P1, it can be seen that the SPL (dB) tends to decrease as the frequency increases. 【0038】In contrast, in the speaker device 1 of this embodiment, a peak P2 (see dotted line b) of SPL(dB) can be observed in the frequency range higher than 10,000 Hz, similar to the comparative example. However, as the frequency increases from peak P2, a tendency can be observed for SPL(dB), which had initially decreased, to rise again. The value of SPL(dB) at this point is greater than that of peak P2 and greater than that of the comparative example in the same frequency range. In other words, in the speaker device 1 of this embodiment, by providing a predetermined gap S between the edge cover equalizer 60 and the outer horn 30 (enclosure), the sound pressure frequency characteristics in the high-frequency range are improved compared to the comparative example. 【0039】 As described above, one possible reason for the improved sound pressure frequency characteristics is that the generated sound is initially concentrated in the gap S, and then diffuses upward towards the upper side X2, thereby enhancing the horn effect. This is also true, for example, when a simple cylindrical frame is used as the "enclosure" instead of the outer horn 30; by creating the gap S, it was possible to improve the sound pressure frequency characteristics in the high-frequency range. 【0040】 Furthermore, although not shown in the diagram, the sound pressure frequency characteristics in the high-frequency range can be further improved by modifying the size and shape of the gap S. For example, when the size of the gap S was set to about 2 mm or less, an even greater improvement in the sound pressure frequency characteristics was observed compared to when the gap S was larger than 2 mm. In addition, in the edge cover equalizer 60, when the shape of the radially outward end of the umbrella portion 62 was changed to the aforementioned expanding shape where the gap S widens towards the upper side X2, an even greater improvement in the sound pressure frequency characteristics was observed. Furthermore, in the edge cover equalizer 60, when the radially inward end of the extension portion 63 was extended to approach the second member 64, a further improvement in the sound pressure frequency characteristics was observed. This suggests that the area over which the extension portion 63 covers the diaphragm 51 also contributes to the improvement of the sound pressure frequency characteristics in the high-frequency range. 【0041】According to the above-described embodiments, by providing a predetermined gap S between the edge cover equalizer 60 and the "enclosure portion", the sound pressure in the high-frequency range of the sound generated from the speaker device 1 can be increased as compared with a configuration without the predetermined gap S. Therefore, it is possible to provide the speaker device 1 provided with the edge cover equalizer 60 (equalizer) that contributes to the improvement of the sound pressure frequency characteristics in the high-frequency range. 【0042】 Further, by making the "enclosure portion" the outer peripheral horn 30 and generating a predetermined gap S between the edge cover equalizer 60 and the opposing portion 70 where the edge cover equalizer 60 and the outer peripheral horn 30 are separated and opposed to each other, the horn effect can be enhanced, and the sound pressure frequency characteristics in the above-described high-frequency range can be further improved. 【0043】 Moreover, by providing the edge cover equalizer 60 with an arcuate umbrella portion 62 that covers the arcuate portion 55 that is the top of the edge 53, the sound pressure frequency characteristics in the above-described high-frequency range can be further improved. 【0044】 Further, by providing the edge cover equalizer 60 with an extension portion 63 that is continuous with the umbrella portion 62 and extends upward X2 (sound radiation side) along the outer surface of the dome-shaped diaphragm, the sound pressure frequency characteristics in the above-described high-frequency range can be further improved. 【0045】 Moreover, by providing the edge cover equalizer 60 with a first member 61 that includes the umbrella portion 62 and the extension portion 63, and a second member 64 that is disposed on the top side of the diaphragm 51 and is separated from the first member 61, the sound pressure frequency characteristics in the above-described high-frequency range can be further improved. 【0046】 Note that the present invention is not limited to the above-described embodiments. That is, those skilled in the art can variously modify and implement it in accordance with conventionally known knowledge without departing from the gist of the present invention. As long as the configuration corresponding to each configuration of the speaker device 1 of the present invention is provided even by such modification, of course, it is included in the scope of the present invention. 【0047】 For example, in the above-described embodiment, the diaphragm 51 is formed in a dome shape, but the diaphragm 51 does not necessarily have to be dome-shaped. The shape of the diaphragm 51 can be appropriately selected, such as a plate shape or a cone shape, as long as it has some kind of outer peripheral portion. 【0048】 Also, in the above embodiment, the edge 53 is shown to be integral with the diaphragm 51. However, this is not restrictive, and the edge 53 may be formed separately from the diaphragm 51. In this case, the material of the edge 53 may be different from the material of the diaphragm 51. For example, the edge 53 may have a laminated structure in which a plurality of resin layers formed of resin films are laminated. Also, the shape of the edge 53 in the above embodiment is merely an example, and the shape of the edge 53 can be appropriately selected other than the above-described shape. For example, the edge 53 may have a shape that does not include the arc-shaped portion 55, and the continuous portion 54 may be extended and connected to the connecting portion 56. Also, the shape of the edge cover equalizer 60 can be appropriately selected. For example, the edge cover equalizer 60 may cover the edge 53 at another portion without including the umbrella portion 62. Also, for the edge cover equalizer 60, the extension portion 63 and the second member 64 may be omitted. 【0049】 Also, in the above embodiment, the outer peripheral horn 30 is used as the "surrounding portion". However, this is not restrictive, and the inner surface of the cylindrical portion 14 may be used as the "surrounding portion", and the outer peripheral horn 30 may be omitted. Also, in addition to the cylindrical portion 14, some configuration such as a wall portion or a plate portion that replaces the outer peripheral horn 30 may be provided, and the outer peripheral portion 52 of the diaphragm 51 may be surrounded by this wall portion or plate portion to constitute the "surrounding portion". 【0050】 S A predetermined gap X1 Lower side (sound generation side) X2 Upper side (sound radiation side) 1 Speaker device 30 Outer peripheral horn (surrounding portion) 51 Diaphragm 52 Outer peripheral portion 53 Edge 60 Edge cover equalizer

Claims

1. A speaker device comprising: a diaphragm having an outer periphery; an enclosure surrounding the outer periphery and extending from the sound-generating side where sound is generated to the sound-radiating side where sound is emitted; an edge connecting the enclosure and the outer periphery; and an edge cover equalizer covering at least a portion of the edge on the sound-radiating side and extending along the edge, wherein a predetermined gap exists between the edge cover equalizer and the enclosure.

2. The speaker device according to claim 1, wherein the enclosure is an outer horn having an inner surface that widens in diameter toward the sound radiation side, and the edge cover equalizer and the outer horn are spaced apart, creating a predetermined gap between opposing parts that face each other.

3. The speaker device according to claim 1 or 2, characterized in that the edge has a convex arc-shaped portion on the sound radiating side, and the edge cover equalizer has an arc-shaped umbrella portion that covers the top of the edge.

4. The speaker device according to any one of claims 1 to 3, characterized in that the diaphragm is formed in a dome shape that is convex toward the sound radiation side, and the edge cover equalizer has an extension that is continuous with the umbrella portion and extends toward the sound radiation side along the outer surface of the diaphragm.

5. The speaker device according to any one of claims 1 to 4, characterized in that the edge cover equalizer comprises a first member having the umbrella portion and the extension portion, and a second member spaced apart from the first member and positioned on the top side of the diaphragm.

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