Speaker device

Abstract

To provide a speaker device capable of suppressing rolling motion of a diaphragm.SOLUTION: A speaker device 1 according to the present invention includes an edge 12 that is provided around a diaphragm 11 and vibrates the diaphragm 11 in the sound emission direction, a frame 13 provided around the edge 12 and supporting the diaphragm 11 via the edge 12, and a linear reinforcement portion 121 provided on the edge 12. The reinforcement portion 121 extends in the circumferential direction of the edge 12 and is connected to the frame 13 at both ends.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] A typical speaker device generates sound by vibrating a diaphragm with a voice coil. The diaphragm is supported by a frame via edges around its periphery. When operating normally, the diaphragm vibrates in the direction of sound emission from the speaker device.

[0003] Patent Document 1 discloses a speaker device in which ribs provided on the edge suppress buckling deformation of the edge. The ribs disclosed in Patent Document 1 extend from the inner side to the outer side in the radial direction of the edge. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-158684 Summary of the Invention [Problem to be solved by the invention]

[0005] In general speaker devices, when the diaphragm is driven, a phenomenon called rolling motion may occur, in which a component vibrating in a direction different from the original driving direction is added at a specific frequency. Rolling motion can cause abnormal noise and must be suppressed. However, in general speaker devices, rolling motion has not been sufficiently suppressed. Patent Document 1 does not disclose any technology that can solve such problems.

[0006] The present invention has been made to solve the above problems, and has an object to provide a speaker device that can suppress the rolling motion of the diaphragm. [Means for solving the problem]

[0007] The speaker device according to the present invention comprises: an edge provided around the diaphragm; a frame supporting the diaphragm via the edge; a reinforcing portion provided on the edge and having a linear portion and both end portions, The reinforcing portion has the linear portion extending in the circumferential direction of the edge, and the both end portions connected to the frame. It is a speaker device. According to this configuration, the reinforcing portion suppresses deformation of the edge, and as a result, rolling motion is suppressed. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a speaker device capable of suppressing the rolling motion of the diaphragm. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing a speaker device according to a conventional technique. [Figure 2] FIG. 10 is a schematic cross-sectional view illustrating the shape of an edge according to the prior art. [Figure 3] FIG. 10 is a schematic perspective view for explaining the rolling action of the diaphragm. [Figure 4] 1 is a perspective view showing a speaker device according to a first embodiment. [Figure 5] FIG. 3 is a schematic cross-sectional view for explaining the shape of an edge according to the first embodiment. [Figure 6] FIG. 3 is a schematic cross-sectional view for explaining the shape of an edge according to the first embodiment. [Figure 7] 1 is a schematic cross-sectional view showing a speaker device according to a first embodiment. [Figure 8] 1 is a schematic plan view showing a speaker device according to a first embodiment. [Figure 9]FIG. 10 is a schematic plan view showing the configuration of a speaker device according to another embodiment. [Figure 10] FIG. 10 is a schematic plan view showing the configuration of a speaker device according to another embodiment. [Figure 11] FIG. 10 is a schematic plan view showing the configuration of a speaker device according to another embodiment. [Figure 12] FIG. 10 is a schematic plan view showing the configuration of a speaker device according to another embodiment. [Figure 13] FIG. 10 is a schematic plan view showing the configuration of a speaker device according to another embodiment. [Figure 14] FIG. 10 is a schematic plan view showing the configuration of a speaker device according to another embodiment. [Figure 15] FIG. 10 is a schematic plan view showing the configuration of a speaker device according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] (Background to the issue) <Configuration of a speaker device according to general technology> The circumstances under which the problem of the present invention arises will be described below with reference to the drawings. First, the configuration of a typical speaker device will be described in detail.

[0011] Fig. 1 is a perspective view of a speaker device according to the prior art. However, only the parts related to the occurrence of the problem of the present application are shown. In detail, only the diaphragm and its outer periphery are shown.

[0012] A speaker device 901 according to the prior art includes a diaphragm 911, an edge 912, a frame 913, a magnetic circuit, a voice coil bobbin, a damper, an input terminal, and the like, all of which are not shown. The magnetic circuit is housed within the frame. The voice coil bobbin, around which the voice coil copper wire is wound, is placed in the magnetic field created by the magnetic circuit. The voice coil receives a current input from the electrically connected input terminal and a Lorentz force generated by the magnetic field, causing the voice coil bobbin to vibrate in the direction of the voice coil winding axis, i.e., in the direction of sound emission. The voice coil bobbin is connected to a damper whose outer periphery is fixed to the frame. 1 is used to explain the positional relationship of the components, with the sound emission direction of speaker device 901 being the Z axis, the minor axis direction of the diaphragm being the X axis, and the major axis direction being the Y axis. These directions are common to the following drawings.

[0013] Diaphragm 911 is a plate made of resin, metal, etc. More specifically, diaphragm 911 is connected to a voice coil bobbin, and vibrates in the sound emission direction, i.e., the Z-axis direction, following the vibration of the voice coil bobbin, thereby generating sound. When diaphragm 911 operates normally, it vibrates in the Z-axis direction while keeping the main surface of diaphragm 911 parallel to the XY plane. The diaphragm 911 is supported by a frame 913 via an edge 912 .

[0014] Edge 912 is an annular member provided on the outer periphery of the diaphragm, and is made of an elastic material such as rubber. 2 is a schematic cross-sectional view illustrating the shape of an edge 912 according to the prior art. More specifically, it is an enlarged view of the vicinity of edge 912 in a schematic cross-sectional view of edge 912 cut along an XZ plane passing through the central axis of the speaker. As shown in Fig. 2, edge 912 has a semicircular cross section. The outer edge of edge 912 is fixed to frame 913 by adhesive, and the diaphragm is attached to the inner edge. In other words, edge 912 has a fixed outer edge and a free inner edge. Edge 912 can follow the movement of diaphragm 911 in the Z-axis direction without interfering with the movement.

[0015] The frame 913 fixes the outer edge of the edge 912 and supports the diaphragm 911 via the edge 912 . The frame 913 accommodates the diaphragm 911 of the speaker device 901, the edge 912, a magnetic circuit (not shown), a voice coil bobbin, a damper, an input terminal, and the like.

[0016] <Rolling motion of the diaphragm> Next, the rolling motion of the diaphragm will be explained. In the following explanation, Fig. 1 or Fig. 2 will be referred to as appropriate. As described above, when speaker device 901 is operating normally, diaphragm 911 vibrates in the Z-axis direction while the main surface of diaphragm 911 is kept parallel to the XY plane.

[0017] However, when the diaphragm vibrates, an imbalance in weight or support can cause a phenomenon known as rolling motion, in which vibration components are added in a direction other than the Z-axis direction at certain frequencies. In particular, rolling motion in a specific direction when the imbalance is large is known as see-saw motion. For example, in the case of diaphragm 911 that is elongated in the Y-axis direction as shown in FIG. 1, diaphragm 911 may vibrate while performing a seesaw motion in the Y-axis direction, with central axis A of diaphragm 911 in the X-axis direction as the axis of rotation.

[0018] When diaphragm 911 is making a seesaw motion, abnormal sounds are mixed into the sound generated by speaker device 901. Furthermore, if the seesaw motion component becomes large, edge 912 may break or the voice coil bobbin may fluctuate and come into contact with the magnetic circuit, damaging speaker device 901.

[0019] FIG. 3 is a schematic perspective view for explaining the seesaw motion of the diaphragm. 3 schematically illustrates only diaphragm 911 and a portion of edge 912 that is perpendicular to central axis A. Furthermore, the main surface of diaphragm 911 is depicted as a horizontal surface and is hatched.

[0020] 3(a) is a diagram showing the state in which the diaphragm 911 is stationary. When stationary, the main surface of the diaphragm 911 is parallel to the XY plane. When the diaphragm 911 is vibrating normally, the diaphragm 911 vibrates in the Z-axis direction while keeping the main surface parallel to the XY plane.

[0021] 3(b) is a first diagram showing the state in which diaphragm 911 is performing a seesaw motion. For example, this shows the state in which diaphragm 911 is rotating clockwise when viewed from the positive side of the X axis, with central axis A as the axis of rotation. A diaphragm that is long and thin in the Y-axis direction is prone to seesaw motion, which alternates between clockwise and counterclockwise rotational displacement around central axis A in the X-axis. If the vibration balance is disrupted by the application of a slight force in a direction other than the Z-axis, the seesaw motion may continue, resulting in an oscillation state.

[0022] 3(b), the portion on the negative Y-axis side as viewed from central axis A rises in the positive Z-axis direction, while the portion on the positive Y-axis side as viewed from central axis A sinks in the negative Z-axis direction. In other words, when diaphragm 911 performs a seesaw motion, edge 912 deforms into shapes with different amounts of deformation in the Z-axis direction at both ends of the Y-axis.

[0023] Furthermore, when attention is paid to the bending of edge 912, the portion on the negative Y-axis side as viewed from central axis A is twisted and bent toward the outer edge, and the portion on the positive Y-axis side as viewed from central axis A is twisted and bent toward the inner edge. In other words, when diaphragm 911 performs a seesaw motion, edge 912 is deformed into a twisted shape around the Y-axis. A restoring force acts on edge 912 to return the twist to its original state, but this force is not strong enough to suppress the seesaw motion, which is an oscillation state, and the seesaw motion cannot be suppressed.

[0024] (Outline of the embodiment) As described above, when the diaphragm makes a seesaw motion, edge 912 follows the movement of diaphragm 911 in the Z-axis direction without interfering with it, but it does not function to restrict diaphragm 911 to vibrate only in the Z-axis direction and therefore does not suppress the seesaw motion. Therefore, in the speaker device of the embodiment described below, a reinforcing portion is provided on the edge, the end of which is connected to the frame, thereby suppressing the seesaw motion without interfering with the movement of the diaphragm in the sound emission direction.

[0025] (First embodiment) A first embodiment of the present invention will be described below with reference to the drawings. 4 is a perspective view showing the speaker device according to the first embodiment. However, only the parts related to the occurrence of the problem of the present application are shown. In detail, only the diaphragm and its outer periphery are shown. 4 is used to explain the positional relationship of the components, with the sound emission direction of the speaker device 1 being the Z axis, the minor axis direction of the diaphragm being the X axis, and the major axis direction being the Y axis. These directions are common to the following drawings.

[0026] The speaker device 1 according to the first embodiment includes a diaphragm 11, an edge 12, a frame 13, a reinforcing portion 121, a magnetic circuit, a voice coil bobbin, a damper, an input terminal, and the like (not shown).

[0027] Diaphragm 11 is a plate made of resin, metal, or the like. More specifically, diaphragm 11 is connected to a voice coil bobbin and vibrates in the sound-emitting direction in response to the vibration of the voice coil bobbin, generating sound. When diaphragm 11 operates normally, it vibrates in the Z-axis direction while keeping the main surface of diaphragm 11 parallel to the XY plane. Diaphragm 11 is supported by frame 13 via edge 12.

[0028] The frame 13 fixes the outer edge of the edge 12 and supports the diaphragm 11 via the edge 12. The frame 13 accommodates the diaphragm 11, the edge 12, a magnetic circuit (not shown), a voice coil bobbin, a damper, an input terminal, etc. of the speaker device 1.

[0029] The edge 12 is an annular member provided on the outer periphery of the diaphragm and is made of an elastic material such as rubber. Fig. 5 is a schematic cross-sectional view for explaining the shape of the edge 12 according to the first embodiment. As shown in Figure 5, edge 12 has a semicircular cross section. The outer edge of edge 12 is fixed to frame 13 by adhesive, and the diaphragm is attached to the inner edge. In other words, edge 12 has a fixed outer edge and a free inner edge. Edge 12 can follow the movement of diaphragm 11 in the Z-axis direction without interfering with this movement. The edge 12 includes linear reinforcing portions 121 extending in the circumferential direction of the edge 12. Here, the circumferential direction refers to the direction along the annular edge around the Z axis.

[0030] The reinforcing portion 121 is made up of a linear portion extending in the circumferential direction of the edge 12 and an end portion at the end of the linear portion that is connected and fixed at the outer edge to the frame 13. The material of the reinforcing portion 121 itself may be a material with greater rigidity than the material of the edge 12, or may be a material with equal rigidity.

[0031] The linear portions of the reinforcing portion 121 are arranged linearly on the edge 12, and improve the rigidity of the edge 12 in the circumferential direction. The end of the reinforcing portion 121 is fixed to the frame 13 at the outer edge while maintaining high bending rigidity in the circumferential direction of the edge 12, and the linear portion of the reinforcing portion 121 is held parallel to the XY plane. With this configuration, reinforcing portion 121 can suppress rotational displacement around central axis A of diaphragm 11, that is, seesaw motion.

[0032] Here, the linear portion that occupies the majority of the reinforcing portion 121 extends in the circumferential direction of the edge 12, but does not extend in the radial direction of the edge 12. Therefore, the reinforcing portion 121 increases the rigidity of the edge 12 in the circumferential direction, but does not increase the rigidity of the edge 12 in the radial direction. With this configuration, reinforcing portion 121 can suppress the seesaw motion of diaphragm 11 while minimizing the inhibiting effect on the vibration in the Z-axis direction of the inner edge side end portion of edge 12 that is connected to diaphragm 11. In other words, reinforcing portion 121 can suppress the seesaw motion of diaphragm 11 while minimizing the inhibiting effect on the vibration operation of diaphragm 11 in the Z-axis direction.

[0033] 5, the reinforcing portion 121 may be composed of a rib integrally molded with the edge 12 and an end portion at the end of the rib that is connected and fixed to the frame 13 at the outer edge along the semicircle of the edge. With this configuration, the portion where the reinforcing portion 121 is formed is thicker and has higher rigidity than the portion where the reinforcing portion 121 is not formed. The shape of the end portion in the Z-axis direction of the rib provided in the reinforcing portion 121 is not limited to the rectangular shape shown in FIG. 5, but may be, for example, a triangular shape or an arc shape.

[0034] The linear portion of the reinforcement portion 121 extending along the longitudinal axis of the edge 12 is not limited to a rib integrally molded with the edge 12. For example, it may be a step extending along the circumferential direction of the edge 12, as shown in FIG. 6 . In this case, the reinforcement portion 121 is composed of a linear portion configured as a linear step and end portions at both ends of the linear portion that are connected and fixed to the frame 13 at their outer edges. Specifically, the edge 12 is composed of two surfaces with different radii that convex radially outward from the radial center of the semicircular edge 12, and the linear portion of the reinforcement portion 121 is configured as a step extending along the circumferential direction of the edge 12, which is a ridge or step surface where the surfaces of different radii connect. Even when the linear portion of the reinforcement portion 121 is a step provided on the edge 12, the reinforcement portion 121 increases the circumferential rigidity of the edge 12, as in the case where the reinforcement portion 121 includes a rib, and therefore can suppress seesaw motion of the edge 12.

[0035] The step provided in the reinforcing portion 121 may be configured as a step surface formed between two ridges connecting a semicircular roll having a first radius located radially inside the edge 12 and a semicircular roll having a second radius located radially outside the edge 12. In this case, the relationship in magnitude between the first radius and the second radius may be such that the first radius is larger, or the second radius is larger, but it is preferable that the first radius is larger. Since the larger the radius of the roll, the smaller the inhibitory effect on the vibration of the diaphragm 11 in the Z-axis direction, when the first radius is larger, i.e., when a roll with a large radius is placed radially inside the edge 12 where the diaphragm 11 is located, the inhibitory effect on the vibration of the diaphragm 11 in the Z-axis direction can be suppressed. Furthermore, since the radial outer side of the edge 12 is fixed to the frame 13 and is not directly connected to the diaphragm 11, even if a roll with a smaller radius is placed, the inhibitory effect on the vibration of the diaphragm 11 in the Z-axis direction is small.

[0036] The first radius and the second radius may be equal in magnitude. In this case, the reinforcing portion 121 may be configured as a ridge or a step surface where the rolls on the semicircle are connected with each other by shifting the centers of the arcs of the rolls.

[0037] When the linear portion of the reinforcing portion 121 is configured as a step, the edge 12 can be considered to be bowl-shaped, with a semicircular roll portion having a second radius as the bottom, and a step surface with enhanced rigidity and the outer edge portion of the reinforcing portion 121 as the sides. Furthermore, the semicircular roll having a first radius connected to the top end of the stepped surface can be regarded as a flange at the top end of the stepped surface, which further improves the rigidity of the edge 12 in the circumferential direction.

[0038] The linear portion of the reinforcing portion 121 extending along the long axis of the edge 12 may be, for example, a crease extending along the circumferential direction of the edge 12 as shown in Fig. 7. In this case, the edge 12 is configured as two annular surfaces disposed on the inner and outer sides in the radial direction, and the corner where the surfaces join becomes the crease or ridge line corresponding to the reinforcing portion 121. Furthermore, when the reinforcing portion 121 is configured as a fold, the reinforcing portion 121 may have a concave shape when viewed from the positive side in the Z axis direction.

[0039] Furthermore, the reinforcing portion 121 may be formed by adhering a linear member made of a material having higher rigidity than the edge 12 to the edge 12. In this case as well, both ends extend to the outer edge of the edge 12 and are adhesively fixed to the frame 13.

[0040] Furthermore, the reinforcing portion 121 may be disposed on the opposite side to the sound output direction, i.e., on the inside of the semicircular edge 12. When disposed on the opposite side to the sound output direction, the reinforcing portion 121 is hidden inside the speaker device 1, thereby providing a speaker device with an excellent appearance.

[0041] Furthermore, the linear portion of the reinforcing portion 121 is preferably disposed at approximately the apex of the semicircular cross section of the edge 12, but may be disposed biased toward the inner edge or outer edge of the edge 12. When the linear portion is biased toward the inner edge of the edge 12, the distance from the fixed portion of the end, i.e., the connection point with the frame 13, increases. Therefore, the resistance in the Z-axis direction at the end is reduced compared to when the linear portion is located approximately at the vertex of the semicircle of the edge 12. Furthermore, when the linear portion is biased toward the outer edge of the edge 12, the distance from the fixed portion of the end, i.e., the connection point with the frame 13, becomes smaller. Therefore, the resistance in the Z-axis direction at the end increases compared to when the linear portion is located approximately at the vertex of the semicircular shape of the edge 12.

[0042] It is not necessary for the entire reinforcing portion 121 to extend in the circumferential direction, but it is sufficient for at least a portion to extend in the circumferential direction of the edge 12. In order to suppress the seesaw motion, it is preferable that the reinforcing portion 121 extend in the circumferential direction of the edge 12 for a length greater than the diameter of a voice coil bobbin (not shown).

[0043] When the edge 12 has a shape including a long axis portion, a short axis portion, and a curved portion connecting the long axis portion and the short axis portion, both ends of the reinforcing portion 121 may be connected to the outer edge portion of the edge 12 at the long axis portion as shown in Fig. 8. In other words, both ends of the reinforcing portion 121 may be connected to and fixed to the outer edge portion of the edge 12 without reaching the curved portion of the edge 12.

[0044] When viewed from the Z-axis direction, the curved portion connecting the long and short shaft portions has a large edge curvature, which causes distortion in shape when driven. The greater the curvature of the curved portion when viewed from the Z-axis direction, the more concentrated the distortion in shape when driven. When distortion in shape is concentrated in the curved portion, resistance occurs in the curved portion when the edge 12 follows the vibration of the diaphragm 11. For this reason, it can be said that areas with a large curvature when viewed from the Z-axis direction are areas where resistance is likely to occur and areas where movement is difficult. If reinforcing portion 121 is provided at a position where the curvature seen from the Z-axis direction is large, distortion of the shape during driving is concentrated by reinforcing portion 121, and normal vibration in the Z-axis direction of diaphragm 11 is hindered. For this reason, as described above, it is preferable that the portion of edge 12 where reinforcing portion 121 is provided be provided at a position where the curvature seen from the sound output direction of diaphragm 11 is small.

[0045] Although two reinforcing parts 121 according to this embodiment are present at positions facing each other across diaphragm 11, only one reinforcing part 121 may be provided on edge 12. However, providing two reinforcing parts 121 on edge 12 can further suppress the seesaw motion because there is no structural imbalance.

[0046] As described above, the linear portions of the reinforcing portion 121 increase the circumferential rigidity of the edge 12, and the ends of the reinforcing portion 121 hold the linear portions parallel to the XY plane, so that the speaker device 1 according to this embodiment can suppress the seesaw motion of the diaphragm 11. As a result, the speaker device 1 can suppress the rolling motion of the diaphragm 11.

[0047] (Other embodiments) 10 and 11 are schematic plan views showing the configuration of a speaker device according to another embodiment. The diaphragm 11, edge 12, and frame 13 in the first embodiment were rectangular when viewed from the sound output direction, but the diaphragm 11, edge 12, and frame 13 in the present invention may be elliptical when viewed from the sound output direction. When the diaphragm 11, the edge 12, and the frame 13 are elliptical, the reinforcing portion 121 may extend linearly in the circumferential direction of the elliptical edge 12, as shown in Fig. 10. Alternatively, the reinforcing portion 121 may extend in the circumferential direction of the elliptical edge 12, with the end of the reinforcing portion 121 being fixed to the frame 13 at the outer edge of the edge 12, as shown in Fig. 11.

[0048] 12 and 13 are schematic plan views showing the configuration of a speaker device according to another embodiment. The diaphragm 11, edge 12, and frame 13 in the first embodiment were rectangular when viewed from the sound output direction of the diaphragm 11, but the diaphragm 11, edge 12, and frame 13 in the present invention may be circular when viewed from the sound output direction. In such a case, the reinforcing portion 121 may extend linearly in the circumferential direction of the circular edge 12, as shown in Fig. 12. Alternatively, the reinforcing portion 121 may extend in the circumferential direction of the circular edge 12, with the end of the reinforcing portion 121 being fixed to the frame 13 at the outer edge of the edge 12, as shown in Fig. 13.

[0049] 14 and 15 are schematic plan views showing the configuration of a speaker device according to another embodiment. The diaphragm 11, edge 12, and frame 13 in the first embodiment were rectangular when viewed from the sound output direction of the diaphragm 11, but the diaphragm 11, edge 12, and frame 13 in the present invention may be track-shaped when viewed from the sound output direction. In such a case, the edge 12 is made up of two pairs of straight sections that face each other across the diaphragm 11, and a curved section that connects these straight sections. As shown in Fig. 14, the reinforcing section 121 may extend linearly around the rectangular edge 12. Alternatively, as shown in Fig. 15, the reinforcing section 121 may extend circumferentially in the long axis direction of the rectangular edge 12, and the end of the reinforcing section 121 may be fixed to the frame 13 at the outer edge of the edge 12 at the straight section in the long axis direction of the edge 12. When curved reinforcing portion 121 is connected to frame 13 at the straight portion of edge 12 as shown in FIG. 14, the effect of inhibiting normal vibration of diaphragm 11 can be further suppressed. On the other hand, when the linear reinforcing portion 121 is connected to the frame 13 at the curved portion of the edge 12 as shown in FIG. 15, the rolling motion can be further suppressed.

[0050] The present invention has been described above in accordance with the above-described embodiments, but the present invention is not limited to the configurations of the above-described embodiments, and naturally includes various modifications, alterations, and combinations that can be made by a person skilled in the art within the scope of the invention claimed in the claims of this application. [Explanation of symbols]

[0051] 1, 901 Speaker device 11, 911 diaphragm 12,912 Edge 13,913 frames 121 Reinforcement

Claims

1. an edge provided around the diaphragm; a frame supporting the diaphragm via the edge; a reinforcing portion provided on the edge and having a linear portion and both end portions, The reinforcing portion is a portion having higher rigidity than the edge, the linear portion having a longitudinal direction along the edge, and both ends of the reinforcing portion are connected to the frame. Speaker device.

2. An edge having a long axis portion and a short axis portion provided around the periphery of the diaphragm; a frame supporting the diaphragm via the edge; a reinforcing portion provided on the edge and having a linear portion and both end portions, The reinforcing portion has the linear portion extending in a circumferential direction of the edge, and the both end portions connected to the frame, The two end portions are connected to the frame at the long axis portion. Speaker device.

3. An edge provided around the periphery of the diaphragm; a frame supporting the diaphragm via the edge; a reinforcing portion provided on the edge and having a linear portion and both end portions, The reinforcing portion has the linear portion extending in a circumferential direction of the edge, and the both end portions connected to the frame, The material of the reinforcing portion has greater rigidity than the material of the edge. Speaker device.

4. The linear portion is a rib.

4. The speaker device according to claim 1.

5. An edge provided around the periphery of the diaphragm; a frame supporting the diaphragm via the edge; a reinforcing portion provided on the edge and having a linear portion and both end portions, The reinforcing portion has the linear portion extending in a circumferential direction of the edge, and the both end portions connected to the frame, The linear portion is a step. Speaker device.

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