JP6751883B2 - Speaker devices, vehicles and AV equipment - Google Patents

Description

The present invention relates to a speaker device and a vehicle and an AV device including the speaker device.

The speaker device is mounted on a vehicle, an AV device, a mobile body, a mobile device, a building, or the like. In recent years, there has been a demand for miniaturization and space saving of speaker devices, and there is a demand for high output, wideband reproduction, and low distortion reproduction sound even with a small size.

When downsizing the speaker device, due to size restrictions, the size of the members that support the vibration system, such as edges and dampers, cannot be secured sufficiently, and the bearing capacity of the diaphragm is asymmetric with respect to the position where the displacement of the diaphragm is zero. Often ends up being. Here, the position of zero displacement is the position of the diaphragm when there is no drive signal input to the speaker device. Further, due to the thickness limitation, the driving force of the diaphragm may be asymmetric with respect to the position where the displacement of the diaphragm is zero. Since the asymmetry of the diaphragm supporting force and the driving force causes distortion of the reproduced sound, it becomes an impeding factor when the speaker device is miniaturized and has a high output.

On the other hand, a speaker device has been proposed that reduces the distortion of the reproduced sound due to the asymmetry of the bearing force of the diaphragm of the speaker and the asymmetry of the driving force, and at the same time reduces the vibration of the cabinet (for example, Patent Document). 1).

FIG. 10 is a diagram showing a configuration of a conventional speaker device (Patent Document 1). In the speaker device 80 shown in FIG. 10, the first speaker unit 83 and the second speaker unit 84 are fixed to the first opening 85a and the second opening 85b, respectively, and the first speaker frame 87 and the second speaker frame 87 and the second. It is provided with a connecting member 86 for connecting the speaker frame 88 of the above. As a result, the vibrations generated by the vibrations of the diaphragms of the first speaker unit 83 and the second speaker unit 84 cancel each other out, and the vibrations of the speaker units 83, 84 and the cabinet 82 can be prevented. Further, the sum of the driving forces of the diaphragms of each speaker is symmetrical with respect to the stationary position of the diaphragms when there is no input, and the secondary distortion of the speakers can be significantly reduced.

Japanese Unexamined Patent Publication No. 11-178085

However, in the configuration of the conventional speaker device as shown in FIG. 10, the distance between the first opening 85a and the second opening 85b is large. Therefore, there is a problem that the path difference of the sound reproduced by the first speaker unit 83 and the second speaker unit 84 is large, causing phase interference and deteriorating the reproduced sound quality.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a speaker device or the like capable of suppressing deterioration of reproduced sound quality while providing a plurality of speaker units.

In order to achieve the above object, the speaker device according to one embodiment of the present invention is a speaker device that reproduces a sound signal, and has a first diaphragm and a first magnetic circuit that drives the first diaphragm. It has a first speaker unit that reproduces a sound signal including a predetermined frequency band, a second diaphragm, and a second magnetic circuit that drives the second diaphragm, and has substantially the same frequency band as the predetermined frequency band. A second speaker unit that reproduces a sound signal including the above, and one or more cabinets to which the first speaker unit and the second speaker unit are attached so that the radiation directions of the sound face each other are provided. At least a part of the space sandwiched between the one speaker unit and the second speaker unit is connected to the outside of the cabinet, and when the sound signal of the speaker device is reproduced, the first diaphragm and the second diaphragm Vibrate in opposite directions.

According to the present invention, it is possible to realize a speaker device or the like capable of suppressing deterioration of reproduced sound quality while providing a plurality of speaker units.

FIG. 1 is a diagram showing an example of the appearance of the speaker device according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line X1-X2 of FIG. FIG. 3A is an example of a cross-sectional structure diagram of the speaker device according to the first embodiment. FIG. 3B is a detailed cross-sectional structural view of the first speaker unit shown in FIG. 3A. FIG. 4 is an example of a structural sectional view of the speaker device in the first modification. FIG. 5 is an example of a structural sectional view of the speaker device in the second modification. FIG. 6 is an example of a structural cross-sectional view of the speaker device in the modified example 3. FIG. 7 is an example of a structural sectional view of the speaker device in the modified example 4. FIG. 8A is an example of a structural sectional view of the speaker device according to the second embodiment. FIG. 8B is a schematic top view of the speaker device shown in FIG. 8A. FIG. 9A is an example of a structural sectional view of the speaker device in the modified example of the second embodiment. 9B is a schematic top view of the speaker device shown in FIG. 9A. FIG. 10 is a diagram showing a configuration of a conventional speaker device.

The speaker device according to one aspect of the present invention is a speaker device that reproduces a sound signal, has a first diaphragm and a first magnetic circuit for driving the first diaphragm, and has a sound including a predetermined frequency band. A first speaker unit that reproduces a signal, a second diaphragm, and a second magnetic circuit that drives the second diaphragm, and reproduces a sound signal including a frequency band substantially the same as the predetermined frequency band. The two speaker units and one or more cabinets to which the first speaker unit and the second speaker unit are attached are provided so that the sound radiation directions face each other, and the first speaker unit and the second speaker are provided. At least a part of the space sandwiched between the units and the unit communicates with the outside of the cabinet, and when the sound signal of the speaker device is reproduced, the first diaphragm and the second diaphragm vibrate in opposite directions.

With this configuration, it is possible to suppress deterioration of the reproduced sound quality while providing a plurality of speaker units.

More specifically, since the path difference of the sound reproduced by the first speaker unit and the second speaker unit can be reduced and phase interference can be prevented, deterioration of the reproduced sound quality can be suppressed.

Further, it is caused by the asymmetry of the amount of air removed by the edge, the distortion of the reproduced sound caused by the driving force of the diaphragm, and the vibration of each speaker unit, which are generated in the first speaker unit and the second speaker unit, respectively. It is possible to reduce all the vibrations of the cabinet that had been used at the same time.

Here, for example, when the first diaphragm operates in the direction approaching the first magnetic circuit during sound signal reproduction of the speaker device, the second diaphragm moves away from the second magnetic circuit. When the first diaphragm operates in a direction away from the first magnetic circuit, it operates in a direction closer to the second magnetic circuit.

Further, for example, the first speaker unit has a first edge that oscillatingly supports the first diaphragm, and the second speaker unit has a second edge that oscillatingly supports the second diaphragm. The cross-sectional shape of the first edge may be convex from the space to the first speaker unit, and the cross-sectional shape of the second edge may be convex from the second speaker unit to the space.

Further, for example, a diffuser plate for diffusing the reproduced sound of the speaker device may be provided in the space at a position facing at least one of the first diaphragm and the second diaphragm.

Further, for example, the cabinet may be composed of a plurality of cabinets, and the plurality of cabinets may be mechanically joined.

Further, for example, it may have a communication pipe that acoustically joins the plurality of cabinets.

Further, for example, the negative electrode and the positive electrode of the sound signal voltage are connected to the positive electrode and the negative electrode of either one of the first speaker unit and the second speaker unit, respectively, and the sound signal is connected to the other positive electrode and the negative electrode, respectively. By connecting the positive electrode and the negative electrode of the voltage, the first diaphragm and the second diaphragm may vibrate in opposite directions when reproducing the sound signal of the speaker device.

Further, for example, the first speaker unit is wound around at least one first voice coil bobbin for transmitting vibration to the first diaphragm and an outer periphery of a substantially central portion of the first voice coil bobbin in the height direction. The second speaker unit has at least one second voice coil bobbin for transmitting vibration to the second diaphragm, and the second speaker unit is substantially centered in the height direction of the second voice coil bobbin. It has a second voice coil wound on the outer periphery of the portion, and the winding directions of the first voice coil and the second voice coil may be opposite to each other.

Further, for example, the first magnetic circuit has a first magnet, the second magnetic circuit has a second magnet, and the magnetizing directions of the first magnet and the second magnet are opposite to each other. May be.

Each of the embodiments described below shows one specific example of the present invention. The numerical values, shapes, components, the order of steps, and the like shown in the following embodiments are examples, and are not intended to limit the present invention. Further, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept are described as arbitrary components. Moreover, in all the embodiments, each content can be combined.

Hereinafter, the speaker device according to one aspect of the present invention will be described with reference to the drawings.

(Embodiment 1)
[Structure of speaker device 1]
FIG. 1 is a diagram showing an example of the appearance of the speaker device 1 according to the present embodiment. FIG. 2 is a cross-sectional view taken along the line X1-X2 of FIG. FIG. 3A is an example of a cross-sectional structure diagram of the speaker device 1 according to the present embodiment. FIG. 3B is a detailed cross-sectional structural view of the first speaker unit 3 shown in FIG. 3A.

As shown in FIGS. 1, 2 and 3A, the speaker device 1 according to the first embodiment includes a cabinet 2 including a first cabinet 2a and a second cabinet 2b, a first speaker unit 3, and a second speaker unit 4. And, the joint member 5 is provided, and the sound signal is reproduced.

(Cabinet 2)
The cabinet 2 is composed of one or more cabinets, and the first speaker unit 3 and the second speaker unit 4 are attached so that the sound radiation directions face each other.

In the present embodiment, the cabinet 2 is composed of a plurality of cabinets of the first cabinet 2a and the second cabinet 2b. Further, a first speaker unit is attached to the first cabinet 2a, and a second speaker unit 4 is attached to the second cabinet 2b. Then, at least a part of the space 51 between the first cabinet 2a and the second cabinet 2b (the space 51 sandwiched between the first speaker unit 3 and the second speaker unit 4) communicates with the outside of the cabinet 2.

The first cabinet 2a and the second cabinet 2b may have the same volume.

(Joint member 5)
The joining member 5 mechanically joins a plurality of cabinets. In the present embodiment, the joining member 5 mechanically joins the first cabinet 2a and the second cabinet 2b.

Further, the joining member 5 joins a part of the outer periphery of the first cabinet 2a and the second cabinet 2b. Therefore, the space 51 between the first cabinet 2a and the second cabinet 2b where there is no joining member 5 communicates with the outside of the cabinet 2.

(1st speaker unit 3)
As described above, the first speaker unit 3 is attached to the upper side in the cabinet 2, that is, the first cabinet 2a side. In the present embodiment, as shown in FIG. 3B, for example, the first speaker unit 3 includes a first diaphragm 31, a first edge 32, a first magnetic circuit 33, a first voice coil bobbin 34, and a first. It includes a voice coil 35 and reproduces a signal including a predetermined frequency band.

The first diaphragm 31 is arranged above the first magnetic circuit 33 in the cabinet 2 and is oscillatedly supported by the first edge 32. Further, the first voice coil bobbin 34 is fixed to the lower side of the first diaphragm 31.

The first edge 32 vibratesly supports the first diaphragm 31. Further, the first edge 32 is arranged so as to be convex upward in the cabinet 2. That is, the first edge 32 arranged on the upper side is convex on the upper side. In other words, the first edge 32 is convex in the direction of being exposed to the outside of the space 51 with respect to the space 51 in the cabinet 2. That is, the cross-sectional shape of the first edge 32 is convex from the space 51 to the first speaker unit 3.

The first magnetic circuit 33 has a first magnet 33a and the like, and drives the first diaphragm 31. More specifically, the first magnetic circuit 33 is a circuit that generates a driving force for driving the first voice coil 35. Here, the external magnetic circuit is a magnetic circuit in which a magnet is arranged outside the voice coil, and the internal magnetic circuit is a magnet in which a magnet is arranged inside the voice coil. It is a magnetic circuit. In the present embodiment, as shown in FIG. 3B, the first magnetic circuit 33 is an internal magnetic circuit in which the first magnet 33a is arranged inside the first voice coil 35.

There is at least one first voice coil bobbin 34, which transmits vibration to the first diaphragm 31. More specifically, the first voice coil bobbin 34 supports the first diaphragm 31 and transmits vibration to the first diaphragm 31.

The first voice coil 35 is wound around the outer circumference of a substantially central portion of the first voice coil bobbin 34 in the height direction, and has a function of converting a voice current into vibration.

(2nd speaker unit 4)
As described above, the second speaker unit 4 is attached to the lower side in the cabinet 2, that is, the second cabinet 2b side. In the present embodiment, the second speaker unit 4 includes the second diaphragm 41, the second edge 42, the second magnetic circuit 43, the second voice coil bobbin 44, and the second speaker unit 4, similarly to the first speaker unit 3. The two voice coils 45 are provided, and a signal including a frequency band substantially the same as a predetermined frequency band reproduced by the first speaker unit is reproduced.

The second diaphragm 41 is arranged above the second magnetic circuit 43 in the cabinet 2 and is oscillated by the second edge 42. Further, the second voice coil bobbin 44 is fixed to the lower side of the second diaphragm 41.

In the present embodiment, the second diaphragm 41 is driven in the direction opposite to that of the first diaphragm 31. That is, when the sound signal of the speaker device 1 is reproduced, the second diaphragm 41 and the first diaphragm 31 vibrate in opposite directions. In other words, when the first diaphragm 31 operates in the direction approaching the first magnetic circuit 33 during the sound signal reproduction of the speaker device 1, the second diaphragm 41 operates in the direction away from the second magnetic circuit 43, and the second diaphragm 41 operates. When the first diaphragm 31 operates in the direction away from the first magnetic circuit 33, the second diaphragm 41 operates in the direction closer to the second magnetic circuit 43. For example, the negative electrode and the positive electrode of the sound signal voltage are connected to the positive electrode and the negative electrode of any one of the first speaker unit 3 and the second speaker unit 4, respectively, and the positive electrode and the negative electrode of the sound signal voltage are connected to each other. The positive and negative electrodes are connected. As a result, the first diaphragm 31 and the second diaphragm 41 can be vibrated in opposite directions when the sound signal of the speaker device 1 is reproduced.

The second edge 42 vibratesly supports the second diaphragm 41. Further, the second edge 42 is arranged so as to be convex upward in the cabinet 2. That is, the second edge 42 arranged on the lower side is convex upward. In other words, the second edge 42 is convex in the direction of entering the outside of the space 51 with respect to the space 51 in the cabinet 2. That is, the cross-sectional shape of the first edge 32 is convex from the second speaker unit 4 to the space 51.

The second magnetic circuit 43 has a second magnet 43a and the like, and drives the second diaphragm 41. More specifically, the second magnetic circuit 43 is a circuit that generates a driving force for driving the second voice coil 45. In the present embodiment, the magnetizing direction of the second magnet 43a and the magnetizing direction of the first magnet 33a are opposite to each other. Further, the second magnetic circuit 43 is an internal magnetic circuit in which the second magnet 43a is arranged inside the second voice coil 45 and is similar to the first magnetic circuit 33.

There is at least one second voice coil bobbin 44, which transmits vibration to the second diaphragm 41. More specifically, the second voice coil bobbin 44 supports the second diaphragm 41 and transmits the vibration to the second diaphragm 41.

The second voice coil 45 is wound around the outer circumference of a substantially central portion of the second voice coil bobbin 44 in the height direction, and has a function of converting a voice current into vibration. In the present embodiment, the winding direction of the second voice coil 45 and the winding direction of the first voice coil 35 are opposite to each other.

[Effects, etc.]
As described above, according to the present embodiment, it is possible to realize the speaker device 1 capable of suppressing the deterioration of the reproduced sound quality while having a plurality of speaker units.

For example, according to the speaker device 1 of the present embodiment, by arranging the first speaker unit 3 and the second speaker unit 4 so as to face each other, the sound outlets can be combined, so that acoustic radiation close to a point sound source ( Playback) is possible. As a result, it is possible to realize the speaker device 1 having good sound image localization during stereo reproduction or multi-channel reproduction.

More specifically, when a sound signal to be reproduced is applied to the speaker device 1, the sound signal is reproduced from the first speaker unit 3 and the second speaker unit 4, respectively. At this time, in the speaker device 1, when the first diaphragm 31 is displaced upward (upper in FIG. 3A), the second diaphragm 41 is driven downward (lower in FIG. 3A). Similarly, when the first diaphragm 31 is displaced downward, the second diaphragm 41 is driven so as to be displaced upward. Then, these sounds are output to the space outside the cabinet 2 without a path difference in the space 51, and these sounds are added and reproduced in the space outside the cabinet 2. That is, according to the speaker device 1 of the present embodiment, the path difference of the sound reproduced by the first speaker unit 3 and the second speaker unit 4 can be reduced and phase interference can be prevented, so that the reproduced sound quality is deteriorated. Can be suppressed.

Further, for example, according to the speaker device 1 of the present embodiment, it is caused by the asymmetry of the amount of air exhausted by the edge and the driving force of the diaphragm, which are generated in the first speaker unit 3 and the second speaker unit 4, respectively. It is possible to simultaneously reduce the distortion of the reproduced sound and the vibration of the cabinet 2 caused by the vibration of each speaker unit.

More specifically, according to the speaker device 1 of the present embodiment, the first diaphragm 31 and the second diaphragm 41 are driven in opposite directions when the sound signal of the speaker device 1 is reproduced. The vibration of the cabinet 2 generated by the vibration of each of the diaphragm 31 and the second diaphragm 41 is canceled. As a result, the vibration of the cabinet 2 generated when the sound signal of the speaker device 1 is reproduced can be significantly reduced.

Further, for example, according to the speaker device 1 of the present embodiment, when the first diaphragm 31 approaches the first magnetic circuit 33 at the time of reproducing the sound signal of the speaker device 1, the second diaphragm 41 is the second magnetic circuit. It is driven away from 43. Further, when the first diaphragm 31 moves away from the first magnetic circuit 33, the second diaphragm 41 is driven so as to approach the second magnetic circuit 43. As a result, the sum of the driving forces of the diaphragms of the first speaker unit 3 and the second speaker unit 4 becomes symmetrical with the case where the sound signal is not applied to the speaker device 1 as a neutral point, and becomes symmetrical with the first speaker unit 3. The asymmetry of the driving force generated in each of the second speaker unit 4 can be offset. As a result, the distortion of the reproduced sound caused by the asymmetry of the driving force can be remarkably reduced.

Further, for example, according to the speaker device 1 of the present embodiment, since the first diaphragm 31 and the second diaphragm 41 are driven in opposite directions, they are eliminated by the first edge 32 and the second edge 42. The sum of the amounts of air can be symmetrical with respect to the case where no sound signal is input and the displacements of the first diaphragm 31 and the second diaphragm 41 are zero. As a result, the distortion of the reproduced sound caused by the asymmetry of the air exclusion amounts of the first edge 32 and the second edge 42 can be significantly reduced.

The first speaker unit 3 and the second speaker unit 4 have been described as having an internal magnetic circuit as shown in FIG. 3A, but the present invention is not limited to this, and the external magnetic circuit may be provided.

(Modification example 1)
FIG. 4 is an example of a structural sectional view of the speaker device 1A in the first modification. The same reference numerals are used for the same components as in FIG. 3A, and the description thereof will be omitted.

The speaker device 1A shown in FIG. 4 differs from the speaker device 1 shown in FIG. 3A in the configurations of the first magnetic circuit 33A of the first speaker unit 3 and the second magnetic circuit 43A of the second speaker unit 4, and is a reflector. 6 has been added. Hereinafter, the differences from the first embodiment will be mainly described.

In the first magnetic circuit 33A, while the first magnetic circuit 33 shown in FIG. 3A is an internal magnetic circuit, the first magnet 331 is arranged outside the first voice coil 35, and the outer magnetism It is a type magnetic circuit. Similarly, in the second magnetic circuit 43A, the second magnetic circuit 43 shown in FIG. 3A is an internal magnetic circuit, whereas the second magnet 431 is arranged outside the second voice coil 45. , An external magnetic circuit. Other configurations are the same as those in the first embodiment, and the description thereof will be omitted.

The reflector 6 is arranged at a position facing at least one of the first diaphragm 31 and the second diaphragm 41, and diffuses the reproduced sound of the speaker device 1A. In the present embodiment, the reflector 6 is composed of the reflector 6a and the reflector 6b. The reflector 6a reflects the sound reproduced by the first speaker unit 3 in the horizontal direction. The reflector 6b reflects the reproduced sound reproduced by the second speaker unit 4 in the horizontal direction.

By including the reflector 6a and the reflector 6b, the speaker device 1A can efficiently output sound in the horizontal direction. Further, since the cabinet 2 has a cylindrical shape as shown in FIG. 1, the speaker device 1A can form an omnidirectional sound source having no directivity in the horizontal direction.

Further, the speaker device 1A includes the reflector 6a and the reflector 6b, so that the volume of the space 51 is divided into the space 51a surrounded by the reflector 6a and the first speaker unit 3, the reflector 6b and the second speaker unit 4. The volume of the space 51b surrounded by and can be reduced. As a result, the capacitor components that contribute to the resonance frequencies of the space 51a and the space 51b can be reduced, so that the reproduction quality of the high frequency band can be further improved.

In the example shown in FIG. 4, a configuration including both the reflector 6a and the reflector 6b is shown, but only one of them may be used. Further, the reflector 6a and the reflector 6b may be acoustic horns that improve the reproduction efficiency of the speaker device 1A.

(Modification 2)
FIG. 5 is an example of a structural sectional view of the speaker device 1B in the modified example 2. The same reference numerals are used for the same components as those in FIGS. 3A and 4, and the description thereof will be omitted.

The speaker device 1B shown in FIG. 5 differs from the speaker device 1A shown in FIG. 4 in that a reflector 7 is further added. Hereinafter, the differences from the first modification will be mainly described.

The reflector 7 has a function of further reducing the volume of the space 51a surrounded by the reflector 6a and the first speaker unit 3. Further, the reflector 7 reflects the sound reproduced by the first speaker unit 3 in the vertical direction.

As a result, the capacitor components that contribute to the resonance frequencies of the space 51a and the space 51b can be reduced, so that the reproduction quality of the high frequency band can be further improved.

(Modification 3)
FIG. 6 is an example of a structural sectional view of the speaker device 1C in the modified example 3. The same reference numerals are used for the same components as those in FIGS. 3A and 4, and the description thereof will be omitted.

The speaker device 1C shown in FIG. 6 differs from the speaker device 1A shown in FIG. 4 in the method of attaching the first speaker unit 3, that is, the arrangement of the first speaker unit 3. Hereinafter, the differences from the modified example 2 will be mainly described.

That is, as shown in FIG. 6, the first speaker unit 3 is attached in the vertical direction opposite to that in the case shown in FIG. 4, that is, the first diaphragm 31 and the first speaker unit 6a are opposed to each other. The speaker unit 3 may be arranged.

Although this configuration does not improve the asymmetry of the driving force between the first diaphragm 31 and the second diaphragm 41, it is reproduced by the symmetry of the sum of the air amounts excluded by the first edge 32 and the second edge 42. The effects of reducing distortion and reducing vibration of the first cabinet 2a can be obtained.

Further, with this configuration, since the first magnetic circuit 33A and the second magnetic circuit 43A are not exposed to the outside of the cabinet 2, it is possible to prevent foreign matter from entering the first magnetic circuit 33A and the second magnetic circuit 43A.

(Modification example 4)
FIG. 7 is an example of a structural sectional view of the speaker device 1D in the modified example 4. The same reference numerals are used for the same components as those in FIGS. 3A, 4 and 6, and the description thereof will be omitted.

The speaker device 1D shown in FIG. 7 has a different configuration of the first speaker unit 3 and the second speaker unit 4 from the speaker device 1C shown in FIG. Hereinafter, the differences from the modified example 3 will be mainly described.

The first speaker unit 3 shown in FIG. 7 has a first diaphragm 31D, a first edge 32D, a first magnetic circuit 33, and a first voice coil bobbin 34D with respect to the first speaker unit 3 shown in FIG. The configuration is different. That is, the first magnetic circuit 33 shown in FIG. 7 is an internal magnetic circuit, and the positions of the first vibrating plate 31D, the first edge 32D, and the first voice coil bobbin 34D are opposite to those of the first magnetic circuit 33. Has been done.

Further, the second speaker unit 4 shown in FIG. 7 is different from the second speaker unit 4 shown in FIG. 6 in that the configuration of the second magnetic circuit 43 is an internal magnetic circuit.

With this configuration, the volume of the space surrounded by the reflector 6a and the first speaker unit 3 (the front volume of the reflector 6a) can be reduced, and the speaker device 1D radiates sound more evenly in the horizontal direction. Is possible.

(Embodiment 2)
FIG. 8A is an example of a structural sectional view of the speaker device 1E according to the second embodiment. FIG. 8B is a schematic top view of the speaker device 1E shown in FIG. 8A. FIG. 8A corresponds to the cross-sectional view taken along the line AOB shown in FIG. 8B. The same components as those in FIG. 7 are used with the same reference numerals, and the description thereof will be omitted.

The speaker device 1E shown in FIGS. 8A and 8B has a first cabinet portion 21a, a second cabinet portion 21b, a cabinet box 2e, a speaker unit 8, and a communication pipe 9 with respect to the speaker device 1D shown in FIG. The configuration is different in that and is added. Hereinafter, the differences from the modified example 4 and the like will be mainly described.

The cabinet box 2e is provided above the speaker device 1E, and the speaker unit 8 is attached to the cabinet box 2e. The diameter of the cabinet box 2e is the same as the diameter of the cabinet 2, that is, the diameters of the first cabinet 2a and the second cabinet 2b.

The speaker unit 8 is a speaker unit that takes charge of a high-pitched sound unit such as a tweeter, and is attached so that its diaphragm communicates with the outside of the cabinet box 2e.

The communication pipe 9 is a hollow columnar body that acoustically joins a plurality of cabinets. In the present embodiment, the communication pipe 9 includes a first cabinet portion 21a in which a part of the first cabinet 2a is opened, a second cabinet portion 21b in which a part of the second cabinet 2b is opened, and a third cabinet. It is composed of a portion 22. The communication pipe 9 acoustically connects the first cabinet 2a and the second cabinet 2b.

With this configuration, the volume of the first cabinet 2a and the volume of the second cabinet 2b can be shared without matching the volume of the first cabinet 2a and the volume of the second cabinet 2b, so that the capacitor component contributing to the resonance frequency can be shared. Is the same, and the distortion sound between the first speaker unit 3 and the second speaker unit 4 can be effectively reduced.

(Modification)
FIG. 9A is an example of a structural sectional view of the speaker device 1F in the modified example of the second embodiment. FIG. 9B is a schematic top view of the speaker device 1F shown in FIG. 9A. FIG. 9A corresponds to the cross-sectional view taken along the line AOB shown in FIG. 9B. The same components as those in FIGS. 7, 9A and 9B are designated by the same reference numerals, and the description thereof will be omitted.

The speaker device 1F shown in FIGS. 9A and 9B has a different cabinet box 2f configuration from the speaker device 1E shown in FIGS. 8A and 8B. Hereinafter, the differences from the second embodiment will be mainly described.

The cabinet box 2f is provided in the vicinity of the spaces 51a and 51b of the speaker device 1F, and is provided so as not to block the spaces 51a and 51b. A speaker unit 8 is attached to the cabinet box 2f.

The speaker unit 8 is attached to the cabinet box 2f, and the diaphragm is attached so as to communicate with the outside of the cabinet box 2f.

With this configuration, since the speaker unit 8 in charge of the treble portion and the first speaker unit 3 and the second speaker unit 4 are close to each other, these sounds are added and reproduced in the space outside the spaces 51a and 51b. The speaker. As described above, according to this modification, the path difference of the sound reproduced by the first speaker unit 3, the second speaker unit 4, and the speaker unit 8 can be reduced.

As described above, according to the speaker device 1F of the present modification, the first speaker unit 3, the second speaker unit 4, and the speaker unit 8 are separated from each other, and a path difference occurs in the reproduced sound. The playback sound quality can be further improved.

Although the speaker device of the present invention has been described above based on the embodiment and the like, the present invention is not limited to this embodiment. As long as the gist of the present invention is not deviated, various modifications that can be conceived by those skilled in the art are applied to the present embodiment, and a form constructed by combining components in different embodiments is also included in the scope of the present invention. ..

For example, in the above-described embodiment or the like, the first cabinet 2a and the second cabinet 2b constituting the cabinet 2 are mechanically joined by the joining member 5 to be sandwiched between the first cabinet 2a and the second cabinet 2b. It is assumed that the space 51 leads to the outside of the cabinet 2, but the present invention is not limited to this. The first cabinet 2a and the second cabinet 2b may be connected and may have at least one opening at a position corresponding to the space 51.

Further, a so-called bass reflex system in which an acoustic port is attached to each of the first cabinet 2a and the second cabinet 2b constituting the cabinet 2 may be adopted to improve the bass reproduction performance. When the speaker device includes a communication pipe as described in the second embodiment, either the first cabinet 2a or the second cabinet 2b may be provided with an acoustic port. By providing the communication pipe, the same effect as when the acoustic port is attached to each of the first cabinet 2a and the second cabinet 2b can be obtained.

Further, the speaker device of the present invention may be any speaker cabinet type such as a back load horn as well as a bass reflex type.

Further, the speaker device according to the present invention is a high-quality speaker with less distortion of reproduced sound, such as an audio device, an AV device such as a television, a mobile device such as a laptop computer, a speaker mounted on a vehicle such as a car, and an ANC. It may be provided in a speaker or the like for (active noise canceller). It has a cabinet and multiple speaker units, and can be realized as a high-quality speaker with little distortion of the reproduced sound.

The present invention can be used for audio equipment, AV equipment such as televisions, mobile equipment such as laptop computers, speakers mounted on vehicles such as cars, and speaker devices used for ANC speakers.

1, 1A, 1B, 1C, 1D, 1E, 1F Speaker device 2 Cabinet 2a 1st cabinet 2b 2nd cabinet 2e, 2f Cabinet box 3 1st speaker unit 4 2nd speaker unit 21a 1st cabinet part 21b 2nd cabinet part 31, 31D 1st diaphragm 32, 32D 1st edge 33, 33A 1st magnetic circuit 33a, 331 1st magnet 34, 34D 1st voice coil bobbin 35 1st voice coil 41 2nd diaphragm 42 2nd edge 43, 43A Second magnetic circuit 43a, 431 Second magnet 51, 51a, 51b Space

Claims (9)

A speaker device that reproduces sound signals.
A first speaker unit having a first diaphragm and a first magnetic circuit for driving the first diaphragm and reproducing a sound signal including a predetermined frequency band, and a first speaker unit.
A second speaker unit having a second diaphragm and a second magnetic circuit for driving the second diaphragm and reproducing a sound signal including a frequency band substantially the same as the predetermined frequency band, and a second speaker unit.
The first speaker unit and one or more cabinets to which the second speaker unit is attached are provided so that the sound radiation directions face each other.
At least a part of the space sandwiched between the first speaker unit and the second speaker unit leads to the outside of the cabinet.
When reproducing the sound signal of the speaker device, the first diaphragm and the second diaphragm vibrate in opposite directions .
The cabinet is composed of two cabinets.
The two cabinets are mechanically joined together
It has at least one set of two communication pipes that acoustically join the two cabinets and are arranged symmetrically with respect to the central axis of the first speaker unit and the central axis of the second speaker unit.
Speaker device. The second diaphragm is used when the sound signal of the speaker device is reproduced.
When the first diaphragm operates in a direction approaching the first magnetic circuit, it operates in a direction away from the second magnetic circuit.
When the first diaphragm operates in the direction away from the first magnetic circuit, it operates in the direction closer to the second magnetic circuit.
The speaker device according to claim 1. The first speaker unit has a first edge that oscillateably supports the first diaphragm.
The second speaker unit has a second edge that oscillateably supports the second diaphragm.
The cross-sectional shape of the first edge is convex from the space to the first speaker unit.
The cross-sectional shape of the second edge is convex from the second speaker unit to the space.
The speaker device according to claim 1 or 2. further,
In the space, a diffuser plate for diffusing the reproduced sound of the speaker device is provided at a position facing at least one of the first diaphragm and the second diaphragm.
The speaker device according to any one of claims 1 to 3. The negative electrode and the positive electrode of the sound signal voltage are connected to the positive electrode and the negative electrode of either one of the first speaker unit and the second speaker unit, respectively, and the positive electrode and the negative electrode of the sound signal voltage are connected to the other positive electrode and the negative electrode, respectively. By connecting the negative electrode, the first diaphragm and the second diaphragm vibrate in opposite directions when reproducing the sound signal of the speaker device.
The speaker device according to any one of claims 1 to 4 . The first speaker unit is wound around at least one first voice coil bobbin for transmitting vibration to the first diaphragm and an outer circumference of a substantially central portion of the first voice coil bobbin in the height direction. Has one voice coil,
The second speaker unit is wound around at least one second voice coil bobbin for transmitting vibration to the second diaphragm and an outer circumference of a substantially central portion of the second voice coil bobbin in the height direction. Has 2 voice coils
The winding directions of the first voice coil and the second voice coil are opposite.
The speaker device according to any one of claims 1 to 4 . The first magnetic circuit has a first magnet.
The second magnetic circuit has a second magnet and has a second magnet.
The magnetizing directions of the first magnet and the second magnet are opposite to each other.
The speaker device according to any one of claims 1 to 4 . A vehicle equipped with the speaker device according to any one of claims 1 to 7 . An AV device equipped with the speaker device according to any one of claims 1 to 7 .

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