JP2008167238A - Speaker apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker apparatus which can materialize high quality acoustic reproduction by mainly enhancing joining force of a drive cone and a diaphragm. <P>SOLUTION: The speaker apparatus includes a vibrating body and a support which elastically supports the vibrating body. The vibrating body has a voice coil bobbin around which a voice coil is wound, the drive cone joined to the voice coil bobbin and the diaphragm joined to the drive cone. The diaphragm includes a pawl-like engagement part, the drive cone has a groove-like engaged part to be engaged with the engagement part, the drive cone and the diaphragm are connected with each other by engagement structure where the engagement part is mechanically engaged with the engaged part. Thus, the joining force between the drive cone and the diaphragm can be increased in comparison with a comparative example having structure of joining the drive cone and the diaphragm using adhesives. Consequently the diaphragm therefore is hard to separate from the drive cone, adhesive peeling as in the comparative example does not occur and the high quality acoustic reproduction is attained even in such a case that the diaphragm, etc. are vibrated with large amplitude. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electrodynamic speaker device including a drive cone and a diaphragm that are integrally driven by a voice coil, and more particularly to a connection structure of a drive cone and a diaphragm.

  In recent years, a drive cone, a diaphragm and an edge that are integrally driven by a voice coil, and a frame have a sealed space surrounded by the drive cone, the diaphragm, the edge, and the frame, and exist in the sealed space. A speaker device including an air suspension mechanism in which a vibrating body is held by the spring property of air (gas) is proposed (see, for example, Patent Document 1).

  The speaker device described in Patent Document 1 has a structure in which a first diaphragm and a second diaphragm arranged coaxially are connected by a rib (connecting member), and are movably arranged in a magnetic gap. The vibration by the voice coil is transmitted to the second diaphragm, and the first diaphragm is driven via the second diaphragm. In such a configuration, a means for joining the rib and the first and second diaphragms using, for example, an adhesive is employed.

  Note that Patent Document 2 describes a speaker device having a double edge structure having a first edge and a second edge. The speaker device described in Patent Document 2 includes a suspension holder that joins the diaphragm and the second edge, and the inner peripheral edge of the suspension holder is joined to the vicinity of the central portion on the bottom side of the diaphragm. Have.

JP 2005-191746 A JP 2005-252924 A

  In the speaker device described in Patent Document 1, the bonding surface between the rib and the first and second diaphragms is substantially parallel to the surface orthogonal to the vibration direction of the first and second diaphragms. Is formed. Further, when the speaker device is driven, compression and expansion of air accompanying the vibration of the first and second diaphragms in a sealed space surrounded by the first diaphragm, the second diaphragm, the edge and the frame. Is repeated. For this reason, in this speaker device, at the time of driving, the joint portion between the rib and the first and second diaphragms is easily peeled off, and the joint portion between the rib and the first and second diaphragms is peeled off. In such a case, a collision between the rib and the first and second diaphragms is caused at the peeled portion to generate abnormal noise, and the first diaphragm and the second diaphragm are separated. As a result, there are problems such as that sound reproduction cannot be performed, air leaks and abnormal sound is emitted.

  Further, in the speaker device described in Patent Document 1, since the ribs for connecting and supporting the first diaphragm and the second diaphragm are integrally formed, the number of parts is accordingly increased. Increase the cost of the speaker device and increase the equivalent mass of the vibrating body, making it difficult for the vibrating body to vibrate.

  Examples of problems to be solved by the present invention include the above. INDUSTRIAL APPLICABILITY The present invention can be suitably used for a speaker device including a drive cone and a diaphragm with a large amplitude, and achieves high-quality sound reproduction by increasing the bonding force between the drive cone and the diaphragm, thereby reducing costs. It is an object of the present invention to provide a speaker device that makes it possible to reduce the equivalent mass of a vibrating body and smooth the movement of the vibrating body.

  The invention according to claim 1 is a speaker device, comprising: a vibrating body; and a support body that elastically supports the vibrating body, wherein the vibrating body is wound with a voice coil and the voice coil. A voice cone bobbin, a drive cone attached to the voice coil bobbin, and a diaphragm, wherein the drive cone and the diaphragm are mechanically connected.

  In one embodiment of the present invention, a speaker device includes a vibrating body and a support body that elastically supports the vibrating body, and the vibrating body includes a voice coil and a voice around which the voice coil is wound. A coil bobbin, a drive cone attached to the voice coil bobbin, and a diaphragm are provided, and the drive cone and the diaphragm are mechanically connected.

  The speaker device includes a vibrating body and a support body that elastically supports the vibrating body. The vibrating body includes a voice coil, a voice coil bobbin around which the voice coil is wound, a drive cone attached to the voice coil bobbin, and a diaphragm. Thereby, the driving force of the voice coil can be transmitted to the diaphragm via the voice coil bobbin and the drive cone. For this reason, the drive cone has a role of transmitting the driving force from the voice coil to the diaphragm via the voice coil bobbin.

  In particular, in this speaker device, the drive cone and the diaphragm are mechanically coupled. Thereby, compared with the comparative example which has the structure which joined the 1st diaphragm and the 2nd diaphragm using the adhesive agent, the joining force of a drive cone and a diaphragm can be enlarged. That is, in the comparative example, the first diaphragm and the second diaphragm are joined using an adhesive, and when the diaphragm is vibrated with a large amplitude, the first diaphragm and the second diaphragm There is a possibility that a large stress acts on the joint portion with the second diaphragm, and the first diaphragm and the second diaphragm are separated at the joint portion. In addition, the stress acting on the joint portion is greater than the adhesive force of the adhesive at the joint portion, or the stress acts over a long period of time and the adhesive force gradually decreases, so that the first diaphragm and the second diaphragm The diaphragm may peel off. In the comparative example, when the first diaphragm and the second diaphragm are separated from each other, abnormal sound is generated due to the collision between the first diaphragm and the second diaphragm at the separated portion. In addition to the occurrence of such a problem, there are problems such as that the first diaphragm and the second diaphragm are peeled off so that sound reproduction cannot be performed, and air leaks at the peeled portion to generate an abnormal sound.

  On the other hand, in this speaker device, the drive cone and the diaphragm are mechanically connected. For this reason, even when a diaphragm or the like is vibrated with a large amplitude, the diaphragm is not easily detached from the drive cone, and peeling as in the comparative example does not occur. It is possible to prevent the occurrence of abnormal sound, and to realize high-quality sound reproduction. As a result, a large audio signal can be input to the voice coil, and sound reproduction can be performed by vibrating the diaphragm with a large amplitude.

  In a preferred example, an adhesive or the like (not shown) may be applied to the connecting portion between the diaphragm and the drive cone to reinforce. By using an adhesive or the like, the bonding force between the drive cone and the diaphragm can be further increased.

  Further, according to the configuration of this speaker device, it is not necessary to provide new parts such as ribs shown in the comparative example for connecting the drive cone and the diaphragm, so that the number of parts can be reduced accordingly. At the same time, the equivalent mass of the vibrator can be reduced. Therefore, the cost of the speaker device can be reduced with the reduction in the number of components, and the movement of the vibrating body can be made smooth as the equivalent mass of the vibrating body is reduced.

  In addition, since the equivalent mass of the vibrating body is small, the diaphragm can be vibrated with a large amplitude even if the audio current input to the voice coil is reduced, and the power consumption can be reduced.

  In one preferable example of the speaker device, the diaphragm includes a fitting portion, and the drive cone includes an opening corresponding to the fitting portion, and a fitted portion that supports the fitting portion. It is preferable to connect the diaphragm and the drive cone by inserting the fitting portion into the opening and fitting the fitting portion and the fitted portion. Here, the fitting portion of the diaphragm corresponds to the first fitting portion 81 of the first embodiment and corresponds to the first fitting portion 83 of the second embodiment in various embodiments. This corresponds to the first fitting portion 85 of the third embodiment. Correspondingly, the opening portion and the fitted portion of the drive cone correspond to the first fitted portion 71 of the first embodiment in various embodiments, and the second embodiment. This corresponds to the first fitted portion 73 of the example, and corresponds to the first fitted portion 75 of the third embodiment.

  In another preferable example of the speaker device, the drive cone includes a fitting portion, and the diaphragm includes an opening corresponding to the fitting portion and a fitted portion that supports the fitting portion. It is preferable to connect the drive cone and the diaphragm by inserting the fitting portion into the opening and fitting the fitting portion and the fitted portion. Here, the fitting portion of the drive cone corresponds to one having the same shape as the first fitting portion 81 of the first embodiment in various embodiments, and is the first of the second embodiment. It corresponds to that having the same shape as that of the fitting portion 83 and corresponds to that having the same shape as the first fitting portion 85 of the third embodiment. Correspondingly, the opening and the fitted portion of the diaphragm have the same shape as the first fitted portion 71 of the first embodiment in various embodiments. Corresponds to the same shape as the first fitted portion 73 of the second embodiment, and corresponds to the same shape as the first fitted portion 75 of the third embodiment. To do.

  In another preferable example of the speaker device, the diaphragm includes a convex or claw-shaped fitting portion, and the drive cone includes a fitted portion that supports the fitting portion, The drive cone and the diaphragm are preferably connected by fitting the fitting portion of the diaphragm to the fitted portion of the drive cone.

  In another preferable example of the speaker device, the diaphragm includes a protruding fitting portion that protrudes from an inner edge portion thereof, and the drive cone supports the protruding fitting portion. It is preferable that the diaphragm and the drive cone be connected by fitting a fitting portion and fitting the protruding fitting portion and the fitted portion.

  In another preferable example of the speaker device, it is preferable that the drive cone and the diaphragm are connected by a connection structure using a screw.

  In another preferable example of the speaker device, the diaphragm includes a convex or claw-shaped fitting portion and a protruding fitting portion, and the drive cone has the convex or claw-shaped fitting portion. A first fitted portion that supports the mating portion, and a second fitted portion that supports the protruding fitting portion, and the convex or claw-like fitting portion of the diaphragm and the A fitting structure in which the second fitting portion of the drive cone is fitted, a fitting structure in which the protruding fitting portion and the second fitting portion are fitted, and a screw It is preferable that the diaphragm and the drive cone are coupled by combining at least two fitting structures among the fitting structures using the.

  In another aspect of the above speaker device, a sealed space is formed between the vibrating body and the support, and the air present in the space is an air spring that elastically supports the vibrating body. It has the function of. Accordingly, it is possible to configure a speaker device including an air suspension mechanism in which a vibrating body is elastically supported by an air spring of air existing in the space. Therefore, in this aspect, in a speaker device including such an air suspension mechanism, it is possible to input a large audio signal to the voice coil, and even when performing sound reproduction by vibrating the diaphragm with a large amplitude, Without vibrating the diaphragm with an excessive amplitude, the diaphragm can be stably vibrated with a desired amplitude, and high reliability can be obtained.

  Various preferred embodiments of the present invention will be described below with reference to the drawings. Various embodiments are characterized in a drive cone / diaphragm coupling structure in a speaker device having an air suspension mechanism.

[First embodiment]
(Configuration of speaker device)
First, the configuration of the speaker device 100 according to the first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a cross-sectional view of the speaker device 100 according to the first embodiment of the present invention cut at a position passing through the central axis L1. FIG. 2A shows a front view of the drive cone 7 when viewed from the opposite direction to the acoustic radiation direction Y1 of FIG. FIG. 2B shows a cross-sectional view through the central axis L1 of the drive cone 7 along the cutting line A-A ′ of FIG. FIG. 3A shows a front view of the diaphragm 8 when viewed from the opposite direction to the acoustic radiation direction Y1 of FIG. FIG. 3B shows a cross-sectional view passing through the central axis L1 of the diaphragm 8 along the cutting line B-B ′ of FIG.

  The speaker device 100 mainly includes an outer magnet type magnetic circuit 30 having a yoke 1, a plurality of magnets 2, a plate 3, and an annular member 4, and a voice coil bobbin 5, a voice coil 6, and a drive. A vibration body 31 having a cone 7, a diaphragm 8, a first edge 9, a second edge 10, and a cap 11, a frame (support body) 12, and other components. . Here, the other components include a gasket 13 and a speaker terminal 17. In the present invention, the shape and driving method of the speaker device 100 are not limited.

(Configuration of magnetic circuit)
The magnetic circuit 30 has a yoke 1, a plurality of magnets 2, a plate 3, and an annular member 4 as constituent members, and the configuration of each constituent member is as follows.

  The yoke 1 has a cylindrical center pole 1a and a flange portion 1b provided so as to extend outward from the lower end portion of the outer peripheral surface of the center pole 1a. The center pole 1a is provided with a through hole 1h penetrating in the acoustic radiation direction Y1. The through hole 1h communicates with the external space S2. The through-hole 1h mainly controls the air pressure on the back side of the cap 11 located on the side opposite to the acoustic radiation direction Y1 when the vibrating body 31 vibrates, and particularly the air pressure increases so that the movement of the vibrating body is not hindered. Has the role of One of the plurality of magnets 2 has an annular shape and is mounted on the flange portion 1 b of the yoke 1. Of the plurality of magnets 2, the other magnet 2 has an annular shape and is mounted on the one magnet 2. The annular member 4 has a cylindrical shape and a protruding shape so as to face the plate 3. The annular member 4 is disposed on the plate 3 in a state where it is inserted into the gap between the plate 3 and the center pole 1a. A magnetic gap 32 is formed between the annular member 4 and the center pole 1a.

(Structure of vibrating body)
The vibrating body 31 has a voice coil bobbin 5, a voice coil 6, a drive cone 7, a diaphragm 8, a first edge 9, a second edge 10 and a cap 11 as constituent members. The configuration of each constituent member is as follows. It is as follows.

  The voice coil bobbin 5 has a cylindrical shape and is disposed so as to surround the upper end portion of the outer peripheral surface of the center pole 1a.

  The voice coil 6 is wound around the outer peripheral surface of the lower end portion of the voice coil bobbin 5 and is positioned in the magnetic gap 32. The voice coil 6 has a pair of plus / minus lead wires (not shown). The positive lead wire is an input wiring for an L (or R) channel signal, and the negative lead wire is an input wiring for a ground (GND) signal. The pair of plus / minus lead wires are electrically connected to a speaker terminal 17 attached to the frame 12. The speaker terminal 17 is also electrically connected to a pair of output wirings on the amplifier side.

  As shown in FIGS. 1 and 2, the drive cone 7 has a substantially annular shape and has a concave and convex cross-sectional shape in the acoustic radiation direction Y1. Further, the drive cone 7 is fitted with a convex or claw-shaped first fitting portion 81 (see FIGS. 1 and 3) provided at the inner peripheral end of the diaphragm 8, so that the inside of the diaphragm 8 is A groove-like first fitted portion 71 (opening) that supports the peripheral portion 8a is provided, and a protruding second fitting portion 82 provided in the center of the diaphragm 8 (FIGS. 1 and 3) and a groove-like second fitted portion 72 (opening) that supports the central portion of the diaphragm 8 is provided. The first fitted portion 71 is provided in the drive cone 7 on the outer side and the upper side of the inner peripheral portion 7a. In the present embodiment, an even number of first fitted portions 71 are provided at a desired interval in the circumferential direction of the drive cone 7. In the drive cone 7, the second fitted portion 72 is provided outside and below the first fitted portion 71, and is provided inside the outer peripheral portion 7 b of the drive cone 7. In this example, a plurality of second fitted portions 72 are provided at a desired interval in the circumferential direction of the drive cone 7. As shown in FIG. 1, the drive cone 7 having the above configuration has an inner peripheral portion 7 a attached to the upper end portion of the outer peripheral surface of the voice coil bobbin 5. Thus, the drive cone 7 has a role of transmitting the vibration of the voice coil 6 to the diaphragm 8 via the voice coil bobbin 5.

  As shown in FIGS. 1 and 3, the diaphragm 8 has a substantially annular shape and a substantially step-like cross-sectional shape, and is fitted with a first fitting portion 71 of the drive cone 7. And a second fitting portion 82 that fits with the second fitting portion 72 of the drive cone 7. The first fitting portion 81 has a convex or claw-like shape, and is provided so as to protrude from the inner peripheral portion 8 a of the diaphragm 8 toward the central axis L <b> 1 of the diaphragm 8. In this example, an even number of first fitting portions 81 are provided at a desired interval in the circumferential direction of the diaphragm 8 corresponding to the first fitted portion 71 of the drive cone 7. Yes. The second fitting portion 82 is provided at the central portion of the diaphragm 8 and has a shape protruding from the central portion toward the second fitted portion 72 of the drive cone 7. In this example, a plurality of second fitting portions 82 are provided at a desired interval in the circumferential direction of the diaphragm 8 corresponding to each second fitted portion 72 of the drive cone 7. ing. As shown in FIG. 1, the diaphragm 8 having the above-described configuration has the first fitting portion 81 fitted to the first fitted portion 71 of the drive cone 7 and the second fitting. The joint portion 82 is mechanically connected to the drive cone 7 in a state where the joint portion 82 is fitted to the second fitted portion 72 of the drive cone 7. Here, in order to connect the diaphragm 8 to the drive cone 7, for example, it is performed as follows. First, the diaphragm 8 is disposed on the drive cone 7, and then the diaphragm 8 is moved to the drive cone 7 side while the second fitting portion 82 of the diaphragm 8 is moved to the second cone of the drive cone 7. The diaphragm 8 is connected to the drive cone 7 by fitting into the fitted part 72 and fitting the first fitting part 81 of the diaphragm 8 into the first fitted part 71 of the drive cone 7. The

  The first edge 9 has a substantially annular shape and a substantially arc-shaped cross-sectional shape. The first edge 9 is arranged so as to protrude to the magnetic circuit 30 side, the inner peripheral portion of the first edge 9 is attached to the outer peripheral portion 7b of the drive cone 7, and the first edge 9 9 is attached to the frame 12. Thereby, the first edge 9 has a role of elastically supporting the drive cone 7. In the present invention, the protruding direction of the first edge 9 may be set to the acoustic radiation direction Y1, and is not particularly limited. Moreover, although the cross-sectional shape of the first edge 9 has one arc, it may be a cross-sectional shape having a plurality of arcs, and is not particularly limited.

  The second edge 10 has a substantially annular shape and a substantially arc-shaped cross-sectional shape. The second edge 10 is disposed so as to protrude in the acoustic radiation direction Y1, and the inner peripheral portion of the second edge 10 is attached to the outer peripheral portion 8b of the diaphragm 8, and the second edge 10 The outer periphery of 10 is attached to the frame 12. Thereby, the second edge 10 has a role of elastically supporting the diaphragm 8. In the present invention, the protruding direction of the second edge 10 may be set in a direction opposite to the acoustic radiation direction Y1, and is not particularly limited. Moreover, although the cross-sectional shape of the first edge 9 has one arc, it may be a cross-sectional shape having a plurality of arcs, and is not particularly limited. A gasket 13 having a substantially annular shape is attached on the outer peripheral portion of the second edge 10, and the outer peripheral portion of the second edge 10 is sandwiched between the gasket 13 and the frame 12.

  The cap 11 has a substantially disk shape. The cap 11 is provided so as to cover the upper end portion of the voice coil bobbin 5 located in the acoustic radiation direction Y1, and its outer peripheral portion is attached to the diaphragm 8. Thereby, the cap 11 has a role of preventing dust, water droplets, and the like from entering the speaker device 100.

(Frame structure)
The frame 12 has a substantially bowl shape and a shape surrounding the vibrating body 31, and has a role of supporting the vibrating body 31. The magnetic circuit cover 19 for taking in the magnetic circuit 30 is attached to the frame 12 via the magnetic circuit 30. The frame 12 and the magnetic circuit cover 19 are preferably formed of a metal material such as aluminum or a resin material. Thereby, the shaping | molding process of the flame | frame 12 and the cover 19 for magnetic circuits becomes easy.

  In the speaker device 100 having the above configuration, a sealed space S <b> 1 is formed between the drive cone 7, the diaphragm 8, the first edge 9, the second edge 10, and the frame 12. For this reason, when the vibrating body 31 moves in the acoustic radiation direction Y1, the volume of the sealed space S1 increases (expands), and the pressure of the sealed space S1 decreases, while the vibrating body 31 is opposite to the acoustic radiation direction Y1. When moving in the direction, the volume of the sealed space S1 decreases (compresses), and the pressure of the sealed space S1 increases. Thereby, the air existing in the sealed space S <b> 1 functions as an air spring that elastically supports the vibrating body 31. For this reason, in this speaker device 100, the vibrating body 31 is elastically caused by the elastic force of the springs of the first edge 9 and the second edge 10 and the elastic force of the air spring regulated by the volume of the sealed space S1. Supported. When the stiffness of the air spring existing in the sealed space S1 needs to be increased, the diameter d2 that defines the effective vibration area of the diaphragm 8 that contributes to vibration temporarily vibrates the drive cone 7 that contributes to vibration. It is set to be larger than the diameter d1 that defines the effective vibration area when regarded as a plate. That is, the effective vibration area of the diaphragm 8 is set to be larger than the effective vibration area when the drive cone 7 is regarded as a diaphragm.

  As described above, in the speaker device 100 having such a configuration, the audio current output from the output wiring on the amplifier side is input to the voice coil 6 through the speaker terminal 17 and the pair of plus / minus leads of the voice coil 6. As a result, an electromagnetic force (Lorentz force) acts on the voice coil 6 in the magnetic gap 32, and the drive cone 7 and the diaphragm 8 move together with the voice coil 6 in the acoustic radiation direction Y1 or the opposite direction. A sound wave is radiated from 8 in the acoustic radiation direction Y1.

(Connection structure of drive cone and diaphragm)
The first embodiment is characterized in that the drive cone 7 and the diaphragm 8 are mechanically connected.

  Specifically, in the speaker device 100, as shown in a broken line area A1 in FIG. 1, the diaphragm 8 includes a first fitting portion 81 having a convex shape or a claw-like shape, and the drive cone 7 Is provided with a first fitting portion 71 (opening) that fits into the first fitting portion 81, and the drive cone 7 and the diaphragm 8 are configured such that the first fitting portion 81 is the first covered portion. The fitting part 71 is fitted and connected.

  Thereby, compared with the comparative example which has the structure which joined the 1st diaphragm and the 2nd diaphragm using the adhesive agent, the joining force of a diaphragm and a drive cone can be enlarged. That is, in the comparative example, since the first diaphragm and the second diaphragm are joined using an adhesive, the first diaphragm is used when vibrating the diaphragm or the like with a large amplitude. There is a possibility that a large stress acts on a joint portion between the first diaphragm and the second diaphragm, and the first diaphragm and the second diaphragm are separated at the joint portion. In addition, the stress acting on the joint portion is greater than the adhesive force of the adhesive at the joint portion, or the stress acts over a long period of time and the adhesive force gradually decreases, so that the first diaphragm and the second diaphragm The diaphragm may peel off. In the comparative example, when the first diaphragm and the second diaphragm are separated, an abnormal sound is generated due to the collision between the first diaphragm and the second diaphragm at the separation portion. At the same time, there are problems such as that the first diaphragm and the second diaphragm are peeled off, so that sound reproduction cannot be performed, air leaks at the peeled portion, and an abnormal sound is generated.

  On the other hand, in the first embodiment, the drive cone 7 and the diaphragm 8 are mechanically connected. For this reason, even when the diaphragm or the like is vibrated with a large amplitude, in the first embodiment, the diaphragm 8 is difficult to be detached from the drive cone 7, and separation as in the comparative example does not occur. Thus, it is possible to prevent the generation of abnormal sounds based on the above-mentioned causes, and to realize high-quality sound reproduction. As a result, it is possible to input a large audio signal to the voice coil 6, and it is possible to perform sound reproduction by vibrating the diaphragm 8 with a large amplitude.

  In a preferred example, an adhesive (not shown) may be applied to the connecting portion between the first fitting portion 81 of the diaphragm 8 and the first fitted portion 71 of the drive cone 7 for reinforcement. . Thereby, the joining force between the drive cone 7 and the diaphragm 8 can be further increased.

  In the speaker device 100, a sealed space S1 is formed between the drive cone 7, the diaphragm 8, the first edge 9, the second edge 10, and the frame 12, and the sealed space S1. The air present in the air has a function of an air spring that elastically supports the vibrating body 31. For this reason, in the speaker device 100 having such an air suspension mechanism, it becomes possible to input a large audio signal to the voice coil 6, and even when sound reproduction is performed by vibrating the diaphragm 8 with a large amplitude, Without oscillating the diaphragm 8 with an excessive amplitude, the diaphragm 8 can be stably oscillated with a desired amplitude, and high reliability can be obtained.

  Further, according to this configuration, since the drive cone 7 and the diaphragm 8 are connected, there is no need to provide a new part. Therefore, the number of parts can be reduced and the equivalent mass of the vibrator 31 can be reduced. can do. Therefore, the cost of the speaker device 100 can be reduced along with the reduction in the number of components, and the movement of the vibrating body 31 can be made smooth as the equivalent mass of the vibrating body 31 is reduced.

  In addition, since the equivalent mass of the vibrating body 31 is small, the diaphragm 8 can be vibrated with a large amplitude even if the audio current input to the voice coil 6 is reduced, and the power consumption can be reduced.

  In the first embodiment, an even number of first fitted portions 71 are provided at a desired interval in the circumferential direction of the drive cone 7, and the first fitting portion is correspondingly provided. 81 are provided at a desired interval in the circumferential direction of the diaphragm 8. However, the present invention is not limited to this, and the number of first fitting parts 71 in the drive cone 7 is not limited, and the number of first fitting parts 81 in the diaphragm 8 is not limited. For example, in the present invention, as shown in FIG. 4A, the first mated portion 71 is provided with an odd number at a desired interval in the circumferential direction of the drive cone 7, As shown in FIG. 4B, an odd number of first fitting portions 81 may be provided at a desired interval in the circumferential direction of the diaphragm 8. In this way, by providing an odd number of the first fitting portions 81, it becomes possible to suppress the split resonance that occurs in the diaphragm 8 (for example, the occurrence of multiple resonances in the diaphragm). The acoustic characteristics of the speaker device 100 can be improved.

  In the first embodiment, the second fitting portion 82 of the diaphragm 8 has a shape protruding from the center portion of the diaphragm 8 toward the second fitted portion 72 of the drive cone 7. The second fitted portion 72 (opening) of the drive cone 7 has a shape that fits with the second fitting portion 82 of the diaphragm 8. Not limited to this, in the present invention, the second fitting portion 82 of the diaphragm 8 has a convex shape or substantially the same as the first fitting portion 81 of the diaphragm 8 as shown in FIG. While having a claw-like shape, the second fitted portion 72 of the drive cone 7 has a groove shape similar to that of the first fitted portion 71 of the drive cone 7 as shown in FIG. You may have a shape. In the case of this aspect, the drive cone 7 and the diaphragm 8 are such that the first fitting portion 81 is fitted to the first fitted portion 71 and mechanically connected, and the convex shape or the claw-like shape is provided. The 2nd fitting part 82 is fitted by the groove-shaped 2nd to-be-fitted part 72, and is mechanically connected. Thereby, the joining force between the drive cone 7 and the diaphragm 8 can be further increased.

  Instead of this, in the present invention, the second fitting portion 82 of the diaphragm 8 has a convex or claw-like shape as shown in FIG. Further, the second fitted portion 72 (opening) of the drive cone 7 has a groove-like shape that fits the convex or claw-like second fitting portion 82 as shown in FIG. Has a shape. On the other hand, the first fitting portion 81 of the diaphragm 8 has a shape protruding toward the first fitted portion 71 (opening portion) of the drive cone 7. Further, the first fitted portion 71 of the drive cone 7 has a shape that fits into the protruding first fitting portion 81. In the case of this aspect, the drive cone 7 and the diaphragm 8 are mechanically connected to each other by fitting the convex or claw-like second fitting portion 82 to the groove-like second fitting portion 72. The Therefore, the bonding force between the drive cone 7 and the diaphragm 8 can be increased.

[Second Embodiment]
Next, the configuration of the speaker device 200 according to the second embodiment of the present invention will be described with reference to FIGS.

  FIG. 6 shows a cross-sectional view of the speaker device 200 according to the second embodiment of the present invention cut at a position passing through the central axis L1. FIG. 7A shows a front view of the drive cone 7x when viewed from the opposite direction to the acoustic radiation direction Y1 of FIG. FIG. 7B shows a cross-sectional view through the central axis L1 of the drive cone 7x along the cutting line C-C ′ of FIG. Fig.8 (a) shows the front view of the diaphragm 8x when it sees from a reverse direction with respect to the acoustic radiation direction Y1 of FIG. FIG. 8B shows a cross-sectional view that passes through the central axis L1 of the diaphragm 8x along the cutting line D-D ′ of FIG.

  When the second embodiment is compared with the first embodiment, the two are different in the configuration of the diaphragm and the drive cone, and the connection structure between the two, and the other configurations are the same. Therefore, hereinafter, only components and the like different from those in the first embodiment will be described, and the same reference numerals are given to components common to the first embodiment, and the description thereof will be omitted.

(Configuration of drive cone)
First, the configuration of the drive cone 7x according to the second embodiment will be described.

  As shown in FIGS. 6 and 7, the drive cone 7x has a substantially annular shape and a concave and convex cross-sectional shape in the acoustic radiation direction Y1. Further, the drive cone 7x is fitted with a protruding first fitting portion 83 (see FIGS. 6 and 8) provided at the inner peripheral end of the diaphragm 8x, and the inner peripheral portion 8a of the diaphragm 8x. The diaphragm is fitted with a first fitted portion 73 (opening) that supports the second fitting portion 84 (see FIGS. 6 and 8) provided at the center of the diaphragm 8x. A groove-like second fitted portion 74 (opening) that supports the center portion of 8x. The first fitted portion 73 is provided outside and above the inner peripheral portion 7a of the drive cone 7x. In this example, a plurality of first fitted portions 73 are provided at a desired interval in the circumferential direction of the drive cone 7x. The first fitted portion 73 has a slit-like shape, and makes it possible to fit the drive cone 7x and the diaphragm 8x by the following method, for example. First, the first fitting portion 83 of the diaphragm 8x is arranged at the position of the broken line area A10 (FIG. 7A) where the first fitted portion 73 of the drive cone 7x is not formed. Thereafter, the diaphragm 8x is rotated in the direction of the arrow (FIG. 7A) with respect to the drive cone 7x, and the first fitting portion 73 of the drive cone 7x and the first fitting portion 83 of the diaphragm 8x. Are arranged at the same position, and the drive cone 7x and the diaphragm 8x are fitted. In the drive cone 7x, the second fitted portion 74 is provided outside and below the first fitted portion 73, and is provided inside the outer peripheral portion 7b of the drive cone 7x. In the present embodiment, a plurality of second fitted portions 74 are provided at a desired interval in the circumferential direction of the drive cone 7x. As shown in FIG. 6, the drive cone 7 x having the above configuration has an inner peripheral portion 7 a attached to the outer peripheral surface of the upper end portion of the voice coil bobbin 5. Thus, the drive cone 7x has a role of transmitting the vibration of the voice coil 6 to the diaphragm 8x via the voice coil bobbin 5.

(Configuration of diaphragm)
Next, the configuration of the diaphragm 8x according to the second embodiment will be described.

  As shown in FIGS. 6 and 8, the diaphragm 8x has a substantially annular shape and a substantially step-like cross-sectional shape, and is fitted to the first fitted portion 73 of the drive cone 7x. A joining portion 83 and a second fitting portion 84 that fits with the second fitting portion 74 of the drive cone 7x are provided. The first fitting portion 83 has a shape protruding from the inner peripheral end of the diaphragm 8x toward the central axis L1 side of the diaphragm 8x, and is formed in a flat plate shape. In the present embodiment, a plurality of first fitting portions 83 are provided at a desired interval in the circumferential direction of the diaphragm 8x corresponding to the first fitted portion 73 of the drive cone 7x. ing. The second fitting portion 84 is provided between the first fitting portion 83 and the outer peripheral portion 8b, and protrudes from the side surface of the diaphragm 8x toward the second fitted portion 74 of the drive cone 7x. Has a shape. In the present embodiment, a plurality of second fitting portions 84 are provided at a desired interval in the circumferential direction of the diaphragm 8x corresponding to the second fitted portion 74 of the drive cone 7x. ing. As shown in FIG. 6, the diaphragm 8 x having the above configuration has the first fitting portion 83 fitted with the first fitted portion 73 of the drive cone 7 x and the second fitting portion 84. Is mechanically connected to the drive cone 7x in a state of being fitted to the second fitted portion 74 of the drive cone 7x.

  Here, the diaphragm 8x is connected to the drive cone 7x, for example, as follows.

  In FIG. 7A, first, the diaphragm 8x is arranged on the drive cone 7x so that the first fitting portion 83 of the diaphragm 8x is located in the broken line area A10. Subsequently, while the diaphragm 8x is rotated counterclockwise in the direction of the arrow with respect to the drive cone 7x from the center axis L1 as a base point, the first fitting portion 83 of the diaphragm 8x is moved to the drive cone 7x. The diaphragm 8x is fitted into the first fitted part 74 and stopped, and the second fitted part 84 of the diaphragm 8x is fitted into the second fitted part 84 of the drive cone 7x. Are connected to the drive cone 7x.

(Connection structure of drive cone and diaphragm)
The second embodiment is characterized in that the drive cone 7x and the diaphragm 8x are mechanically connected by a different type of method from the first embodiment.

  Specifically, in the speaker device 200, as shown in a broken line area A2 in FIG. 6, the vibration plate 8x includes a protruding first fitting portion 83, and the drive cone 7x has a first shape of the vibration plate 8x. 1 is provided with a slit-like first fitted portion 73 fitted to one fitting portion 83, and the drive cone 7x and the diaphragm 8x vibrate due to relative rotation between the drive cone 7x and the diaphragm 8x. The first fitting portion 83 of the plate 8x is connected to the first fitted portion 73 of the drive cone 7x by being fitted and stopped.

  Thereby, even when the diaphragm or the like is vibrated with a large amplitude, in the second embodiment, it is difficult for the diaphragm 8x to be detached from the drive cone 7x, and the occurrence of separation as in the comparative example described above is suppressed. In addition, it is possible to prevent the generation of abnormal sounds caused by the collision between the diaphragm 8x and the drive cone 7x, and to realize high-quality sound reproduction. As a result, it becomes possible to input a large audio signal to the voice coil 6, and it is possible to reproduce sound by vibrating the diaphragm 8x with a large amplitude.

  Further, an adhesive (not shown) may be applied to the connecting portion between the first fitting portion 83 of the diaphragm 8x and the first fitted portion 73 of the drive cone 7x to reinforce. Thereby, the coupling force between the drive cone 7x and the diaphragm 8x can be further increased.

  In the speaker device 200, a sealed space S1 is formed between the drive cone 7x, the diaphragm 8x, the first edge 9, the second edge 10, and the frame 12, and the sealed space S1. The air present in the air has a function of an air spring that elastically supports the vibrating body 31. For this reason, in the speaker device 200 having such an air suspension mechanism, a large audio signal is input to the voice coil 6, and the diaphragm 8 is vibrated stably with a desired amplitude without excessive vibration. The plate 8 can be vibrated, and high reliability can be obtained even when sound reproduction is performed by vibrating the vibration plate 8x with a large amplitude.

  Further, according to this configuration, since it is not necessary to provide a new part to connect the drive cone 7x and the diaphragm 8x, the number of parts can be reduced by that amount, and the equivalent mass of the vibrating body 31 can be reduced. Can be small. Therefore, the cost of the speaker device 200 can be reduced along with the reduction in the number of components, and the movement of the vibrating body 31 can be made smooth as the equivalent mass of the vibrating body 31 is reduced.

  Further, since the equivalent mass of the vibrating body 31 is small, the diaphragm 8x can be vibrated with a large amplitude even if the audio current input to the voice coil is reduced, and the power consumption can be reduced.

  In the present invention, the mechanical connection structure of the second embodiment is also applied to the connection structure between the second fitting portion 84 of the diaphragm 8x and the second fitted portion 84 of the drive cone 7x. That is, the first fitting portion 83 of the diaphragm 8x and the first fitted portion 73 of the drive cone 7x may be mechanically fitted to each other for connection. Thereby, the joining force between the drive cone 7x and the diaphragm 8x can be further increased.

  On the other hand, the first fitting portion 83 of the diaphragm 8x is formed in a slit shape like the first fitted portion 73 of the drive cone 7x as shown in FIG. 8C, and the diaphragm 8x and the drive are driven. The cone 7x may be fitted. At this time, a portion 83a of the first fitting portion 83 is inserted into the first fitted portion 73, and the other portion 83b of the first fitting portion 83 replaces the portion 83a with the first portion 83a. It serves as a guide when inserted into the fitted portion 73.

[Third embodiment]
Next, the configuration of the speaker device 300 according to the third embodiment of the present invention will be described with reference to FIGS.

  FIG. 9 is a cross-sectional view of the speaker device 300 according to the third embodiment of the present invention cut at a position passing through the central axis L1. Fig.10 (a) shows the front view of the drive cone 7y when it sees from the reverse direction with respect to the acoustic radiation direction Y1 of FIG. FIG. 10B shows a cross-sectional view through the central axis L1 of the drive cone 7y along the cutting line E-E 'of FIG. Fig.11 (a) shows the front view of the diaphragm 8y when it sees from a reverse direction with respect to the acoustic radiation direction Y1 of FIG. FIG. 11B shows a cross-sectional view that passes through the central axis L1 of the diaphragm 8y along the cutting line F-F ′ of FIG.

  When the third embodiment is compared with the first and second embodiments, they are different in the configuration of the diaphragm and the drive cone, and the connection structure between them, and the other configurations are the same. Therefore, hereinafter, only components and the like different from those of the first and second embodiments will be described, and components common to the first and second embodiments will be denoted by the same reference numerals, and description thereof will be omitted.

(Configuration of drive cone)
First, the configuration of the drive cone 7y according to the third embodiment will be described.

  As shown in FIGS. 9 and 10, the drive cone 7y has a substantially annular shape and has a concave and convex cross-sectional shape in the acoustic radiation direction Y1, and is provided on the inner peripheral portion 8a of the diaphragm 8y. A first fitted portion 75 (opening portion) that supports the inner peripheral portion 8a of the diaphragm 8y by being fitted to the fitting portion 85 (see FIGS. 9 and 11), and the center portion of the diaphragm 8y And a second fitted portion 76 (opening) that fits with the second fitting portion 86 (see FIGS. 9 and 11) provided on the center and supports the central portion of the diaphragm 8y. . The first fitted portion 75 is provided outside and above the inner peripheral portion 7a of the drive cone 7y. An insertion hole 75 a for inserting a male screw (bolt) 90 is provided at the center of the first fitted portion 75. In the drive cone 7y, the second fitted portion 76 is provided outside and above the first fitted portion 75, and is provided inside the outer peripheral portion 7b of the drive cone 7y. In this example, a plurality of second fitted portions 76 are provided at a desired interval in the circumferential direction of the drive cone 7y. As shown in FIG. 9, the drive cone 7 y having the above configuration has an inner peripheral portion 7 a attached to the outer peripheral surface of the upper end portion of the voice coil bobbin 5. Thus, the drive cone 7y has a role of transmitting the vibration of the voice coil 6 to the diaphragm 8y via the voice coil bobbin 5.

(Configuration of diaphragm)
Next, the configuration of the diaphragm 8y according to the third embodiment will be described.

  As shown in FIGS. 9 and 11, the diaphragm 8y has a substantially annular shape and a substantially step-like cross-sectional shape, and is fitted to the first fitted portion 75 of the drive cone 7y. And a second fitting portion 86 fitted to the second fitting portion 76 of the drive cone 7y. The first fitting portion 85 forms an annular groove and is provided on the inner peripheral portion of the diaphragm 8y. The first fitting portion 85 is provided with an insertion hole 85a for inserting the male screw 90 at a desired interval in the circumferential direction. The second fitting portion 86 is provided at the central portion of the diaphragm 8 and has a shape protruding from the central portion toward the second fitted portion 76 of the drive cone 7y. In this embodiment, a plurality of second fitting portions 86 are provided at a desired interval in the circumferential direction of the diaphragm 8y corresponding to each second fitted portion 76 of the drive cone 7y. It has been. As shown in FIG. 9, the diaphragm 8y having the above-described configuration is in a state in which the first fitting portion 85 is fitted to the first fitted portion 75 of the drive cone 7y and the second fitting is performed. In a state where the joint portion 86 is fitted to the second fitted portion 76 of the drive cone 7y, the tip of the male screw 90 that is further inserted into the insertion hole 85a of the diaphragm 8y and the insertion hole 75a of the drive cone 7y. The portion is mechanically connected to the drive cone 7 y in a state where the portion is tightened by a female screw (nut) 91.

  Here, the diaphragm 8y is connected to the drive cone 7y, for example, as follows.

  First, the diaphragm 8y is arranged on the drive cone 7y, and then the first fitting portion 85 of the diaphragm 8y is fitted to the first fitting portion 75 of the drive cone 7y, and the diaphragm 8y The second fitting portion 86 is fitted into the second fitting portion 76 of the drive cone 7y, and the male insertion hole 85a of the diaphragm 8y and the insertion hole 75a of the drive cone 7y are arranged in this order from the acoustic radiation direction Y1. The screw 90 is inserted, and the distal end portion of the male screw 90 is tightened with the female screw 91. As a result, the drive cone 7 y and the diaphragm 8 y are connected by a mechanical screwing structure in which the male screw 90 and the female screw 91 are fastened together.

(Connection structure of drive cone and diaphragm)
The third embodiment is characterized in that the drive cone 7y and the diaphragm 8y are connected by a mechanical connection structure of a type different from the first and second embodiments.

  Specifically, in the speaker device 300, as shown in a broken line area A3 in FIG. 9, the drive cone 7y and the diaphragm 8y are mechanically screwed using a male screw 90 and a female screw 91 (connection). Structure). That is, in the speaker device 300, the diaphragm 8y includes the first fitting portion 85, and the drive cone 7y is fitted to the first fitting portion 85 of the diaphragm 8y. The first fitting portion 85 of the diaphragm 8y has an insertion hole 85a for inserting the male screw 90, and the first fitted portion 75 of the drive cone 7y passes the male screw 90. The drive cone 7y and the diaphragm 8y are shared by the male screw 90 and the female screw 91 inserted through the insertion hole 85a of the diaphragm 8y and the insertion hole 75a of the drive cone 7y. It is connected by a tightened screw structure.

  Thereby, even when the diaphragm or the like is vibrated with a large amplitude, in the third embodiment, it is difficult for the diaphragm 8y to be detached from the drive cone 7y, and the occurrence of separation as in the comparative example described above is suppressed. In addition, it is possible to prevent the generation of abnormal noise caused by the collision between the diaphragm 8y and the drive cone 7y, and to realize high-quality sound reproduction. As a result, it becomes possible to input a large audio signal to the voice coil 6, and it is possible to reproduce sound by vibrating the diaphragm 8y with a large amplitude.

  In addition, the portion where the first fitting portion 85 of the diaphragm 8y and the first fitted portion 75 of the drive cone 7y are fitted, and the male screw 90 and the female located at the fitting portion. An adhesive (not shown) may be applied to the mechanical connection portion with the screw 91 for reinforcement. Thereby, the joining force of the drive cone 7y and the diaphragm 8y can be further increased.

  In the speaker device 300, a sealed space S1 is formed between the drive cone 7y, the diaphragm 8y, the first edge 9, the second edge 10, and the frame 12, and the sealed space S1. The air present in the air has a function of an air spring that elastically supports the vibrating body 31. For this reason, in the speaker device 300 having such an air suspension mechanism, a large audio signal is input to the voice coil 6, and the diaphragm 8 is not vibrated with an excessive amplitude, and can be stably stabilized with a desired amplitude. The diaphragm 8 can be vibrated, and high reliability can be obtained even when sound reproduction is performed by vibrating the diaphragm 8y with a large amplitude.

  Further, according to this configuration, since it is not necessary to provide a new part for connecting the drive cone 7y and the diaphragm 8y, the number of parts can be reduced and the equivalent mass of the vibrating body 31 can be reduced. can do. Therefore, the cost of the speaker device 300 can be reduced along with the reduction in the number of components, and the movement of the vibrating body 31 can be made smooth as the equivalent mass of the vibrating body 31 is reduced.

  Further, since the equivalent mass of the vibrating body 31 is small, the diaphragm 8y can be vibrated with a large amplitude even if the audio current input to the voice coil 6 is reduced, and the power consumption can be reduced.

  In the present invention, the mechanical connection structure of the third embodiment is also applied to the connection structure of the second fitting portion 86 of the diaphragm 8y and the second fitted portion 86 of the drive cone 7y. That is, the first fitting portion 85 of the diaphragm 8y and the first fitted portion 75 of the drive cone 7y may be mechanically coupled. Thereby, the joining force of the drive cone 7y and the diaphragm 8y can be further increased.

[Modification]
In the present invention, the drive cone and the diaphragm may be coupled by combining at least two or more coupling structures among the mechanical coupling structures of the first to third embodiments described above.

  In the present invention, the number of the fitting parts and the fitted parts is not particularly limited in the first to third examples, but the divided resonance generated in the diaphragm or the like is provided by providing an odd number. This can be suppressed and the sound quality of the speaker device can be improved.

  In the present invention, the first fitting portion 81 of the diaphragm 8 and the first fitted portion 71 of the drive cone 7 may be replaced with each other in the first embodiment. In the second embodiment, the first fitting portion 83 of the diaphragm 8x and the first fitted portion 73 of the drive cone 7x may be replaced with each other. In the third embodiment, the diaphragm 8y The first fitting portion 85 and the first fitted portion 75 of the drive cone 7y may be replaced with each other.

  In addition, various modifications can be made in the present invention without departing from the spirit of the present invention.

1 is a cross-sectional view of a speaker device according to a first embodiment of the present invention. The front view and sectional drawing of the drive cone which concern on 1st Example. The front view and sectional drawing of the diaphragm which concern on 1st Example. The front view of the diaphragm and drive cone which concern on the other form of 1st Example. The principal part sectional drawing which shows the connection structure of the diaphragm and drive cone which concern on the other form of 1st Example. Sectional drawing of the speaker apparatus which concerns on 2nd Example of this invention. The front view and sectional drawing of the drive cone which concern on 2nd Example. The front view and sectional drawing of the diaphragm which concern on 2nd Example. Sectional drawing of the speaker apparatus which concerns on 3rd Example of this invention. The front view and sectional drawing of the drive cone which concern on 3rd Example. The front view and sectional drawing of a diaphragm which concern on 3rd Example.

Explanation of symbols

7 Drive cone 8 Diaphragm 71, 73, 75 1st fitting part 81, 83, 85 1st to-be-fitted part 75a, 85a Insertion hole 90 Male screw 91 Female screw 30 Magnetic circuit 31 Vibrating body 100, 200, 300 Speaker device

Claims (8)

A vibrating body, and a support body that elastically supports the vibrating body,
The vibrator includes a voice coil, a voice coil bobbin around which the voice coil is wound,
A drive cone attached to the voice coil bobbin and a diaphragm;
The speaker device, wherein the drive cone and the diaphragm are mechanically connected. The diaphragm includes a fitting portion,
The drive cone includes an opening corresponding to the fitting portion, and a fitted portion that supports the fitting portion,
2. The diaphragm and the drive cone are coupled by inserting the fitting portion into the opening and fitting the fitting portion and the fitted portion. The speaker device described. The drive cone includes a fitting portion,
The diaphragm includes an opening corresponding to the fitting portion, and a fitted portion that supports the fitting portion,
The drive cone and the diaphragm are connected by inserting the fitting portion into the opening and fitting the fitting portion and the fitted portion. The speaker device described. The diaphragm includes a convex or claw-shaped fitting portion,
The drive cone includes a fitted portion that supports the fitting portion,
The speaker according to claim 1, wherein the drive cone and the diaphragm are connected by fitting the fitting portion of the diaphragm to the fitted portion of the drive cone. apparatus. The diaphragm includes a protruding fitting portion protruding from an inner edge portion thereof,
The drive cone includes a fitted portion that supports the protruding fitting portion,
The speaker device according to claim 1, wherein the diaphragm and the drive cone are connected by fitting the protruding fitting portion and the fitting portion.   The speaker device according to claim 1, wherein the drive cone and the diaphragm are connected by a fitting structure using a screw. The diaphragm includes a convex or claw-shaped fitting portion and a protruding fitting portion,
The drive cone includes a first fitted part that supports the convex or claw-like fitting part, and a second fitted part that supports the protruding fitting part,
A fitting structure in which the convex or claw-like fitting portion of the diaphragm and the second fitting portion of the drive cone are fitted, and the protruding fitting portion and the second covered portion. Combining the diaphragm and the drive cone by combining at least two fitting structures among a fitting structure in which the fitting portion is fitted and a fitting structure using a screw; The speaker device according to claim 1, wherein: A sealed space is formed between the vibrating body and the support,
The speaker device according to any one of claims 1 to 7, wherein air existing in the space has a function of an air spring that elastically supports the vibrating body.

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