Patent Grant
9288580
The present invention relates to speaker devices, audio visual equipment including speaker devices, mobile information processing apparatuses including speaker devices, vehicles including speaker devices, earphones including speaker devices, and the like.
In recent years, downsizing and sophistication of audio visual devices, i.e., so-called AV equipment, are rapidly progressing. Downsizing and sophistication are particularly remarkable in cellular phones, smartphones, tablet PC (personal computer) terminals, and the like. However, since downsizing and sophistication are simultaneously progressing, devices mounted on each equipment are desired to be smaller and thinner. Speaker devices mounted on each equipment are no exception, and are desired to be smaller and thinner like other devices. However, downsizing of a speaker device causes degradation of reproduction performance, particularly, reproduction frequency band or reproduction efficiency, and therefore, conventional techniques have limitations in downsizing and reproduction performance.
As a conventional art, there is a speaker device in which a magnetic fluid is disposed in a magnetic circuit to improve reproduction performance of the speaker device (refer to Patent Literature 1, for example).
In the speaker device shown in
[PTL 1] International Publication WO2009-066415
In the speaker device configured as described in Patent Literature 1, a sound generated from the rear surface of the diaphragm 104 passes through a hole penetrating through the plate 101, the magnet 102, and the yoke 103, and is emitted from a lower surface of the speaker device. If the hole is not provided, vibration of the diaphragm is suppressed by stiffness of air in a space surrounded by the plate 101, the magnetic fluid 107, the voice coil 106, and the diaphragm 104, and thereby bass reproduction of the speaker device is inhibited.
However, since it is difficult to form a hole through a magnet because of problems in manufacturing, the shape of the magnet is restricted. For example, it is difficult to manufacture a thin or slim magnet. The reason is as follows. When a magnet contracts during sintering, a stress occurs at the periphery of a hole, and causes cracking or the like. For example, a thin magnet is easy to crack because it is weak against a stress. An oval magnet or a magnet having a track shape (a shape composed of two parallel linear segments and two curved segments connecting the linear segments at their opposite ends) is easy to crack because a stress applied to the periphery of a hole is uneven. Therefore, it is difficult to manufacture these magnets. More specifically, it is difficult to stably manufacture a magnet with a hole, having a thickness less than 1 mm, or a rectangular or track-shaped magnet with a hole, having a width less than 5 mm. Therefore, according to Patent Literature 1, it is difficult to realize a thin speaker device or a slim speaker device.
On the other hand, there is a method in which a magnet without a hole is manufactured, and a hole is formed in the magnet in a subsequent process. However, when a hole is formed in a thin or slim magnet, the magnet is likely to crack during a drilling process, and therefore, it is difficult to stably manufacture the magnet. Although it is conceivable that the drilling speed is reduced to avoid cracking, such processing increases the manufacturing cost and degrades the mass productivity.
The present invention is made in view of the above problems, and provides a compact speaker device which facilitates manufacture of a magnet, and enables reproduction in a wide frequency range.
A speaker device according to an aspect of the present invention includes: a magnetic circuit including a plate, a magnet having a surface fixed to one surface of the plate and having no through-hole, and a yoke fixed to a surface of the magnet opposite to the surface fixed to the plate and forming a magnetic gap between itself and an outer peripheral surface of the plate; a voice coil disposed in the magnetic gap; a diaphragm directly or indirectly fixed to the voice coil; a supporting part configured to support the diaphragm; and a magnetic fluid disposed in at least one of a space between the outer peripheral surface of the plate and an inner peripheral surface of the voice coil, and a space between an outer peripheral surface of the voice coil and an inner peripheral surface of the yoke. A rear surface side space between a rear surface of the diaphragm and a front surface of the plate communicates with a space outside the speaker device through a gap for communication which is formed in at least a part, in a peripheral direction of the voice coil, of the space between the outer peripheral surface of the plate and the inner peripheral surface of the voice coil.
According to the speaker device of the present invention, a magnet having no hole can be used as the magnet constituting the magnetic circuit. Therefore, the speaker device can be downsized or slimmed without being restricted by problems in manufacturing, such as cracking during sintering. Accordingly, it is possible to provide a compact speaker device which is more easily mountable, and enables reproduction in a wide frequency range.
Hereinafter, embodiments will be described with reference to the drawings. It should be noted that each of the embodiments described below shows a preferable and specific example of the present disclosure. The numerical values, shapes, materials, components, the arrangement and connection mode of the components, steps, the processing order of the steps etc. shown in the following embodiments are mere examples, and therefore do not limit the present disclosure. The present disclosure is limited only by the scope of the claims. Accordingly, among the components in the following embodiments, the component which is not defined in an independent claim representing the broadest concept of the present disclosure is described as not being necessarily required for achieving the object of the present disclosure but constituting a more preferred embodiment. The same reference numerals are assigned to the same components and descriptions for them may be omitted. In addition, all the embodiments described below can be configured by combining the matters described in the respective embodiments.
A speaker device according a first aspect includes: a magnetic circuit including a plate, a magnet having a surface fixed to one surface of the plate and having no through-hole, and a yoke fixed to a surface of the magnet opposite to the surface fixed to the plate and forming a magnetic gap between itself and an outer peripheral surface of the plate; a voice coil disposed in the magnetic gap; a diaphragm directly or indirectly fixed to the voice coil; a supporting part that supports the diaphragm; and a magnetic fluid disposed in at least one of a space between the outer peripheral surface of the plate and an inner peripheral surface of the voice coil, and a space between an outer peripheral surface of the voice coil and an inner peripheral surface of the yoke. A rear surface side space between a rear surface of the diaphragm and a front surface of the plate communicates with a space outside the speaker device through a gap for communication which is formed in at least a part, in a peripheral direction of the voice coil, of the space between the outer peripheral surface of the plate and the inner peripheral surface of the voice coil.
According a second aspect, in the speaker device according to the first aspect, a through-hole is formed in the yoke outside a region where the magnet is fixed to the yoke, and the rear surface side space communicates with the space outside the speaker device through the gap for communication and the through-hole of the yoke.
According to a third aspect, in the speaker device according to the first or second aspect, the outer peripheral surface of the plate has a pair of long-side side surfaces opposing each other in a short side direction of the plate, and a pair of short-side side surfaces opposing each other in a long side direction of the plate. In the space between the outer peripheral surface of the plate and the inner peripheral surface of the voice coil, the magnetic fluid is disposed outside the long-side side surfaces, and the gap for communication is formed outside at least a part of the short-side side surfaces
According to a fourth aspect, in the speaker device according to the third aspect, portions of the inner peripheral surface of the voice coil, opposing the short-side side surfaces, are more distant from the outer peripheral surface of the plate than portions thereof opposing the long-side side surfaces.
According to a fifth aspect, in the speaker device according to the third aspect, projections projecting outward are formed at a part of the short-side side surfaces. In the space between the outer peripheral surface of the plate and the inner peripheral surface of the voice coil, the magnetic fluid is disposed outside top end surfaces of the projections.
According to a sixth aspect, in the speaker device according to the first or second aspect, the plate has a planar shape having cutouts at four corners. In the space between the outer peripheral surface of the plate and the inner peripheral surface of the voice coil the cutouts form the gaps for communication, and the magnetic fluid is disposed at portions other than the cutouts.
According to a seventh aspect, in the speaker device according to any one of the first to sixth aspects, the supporting part supports the diaphragm over the entire periphery of the diaphragm.
According to an eighth aspect, in the speaker device according to the first or second aspect, the supporting part includes a plurality of supporting members each supporting the diaphragm. Between the outer peripheral surface of the voice coil and the inner peripheral surface of the yoke, the magnetic fluid is disposed over the entire periphery in the peripheral direction of the voice coil.
According to a ninth aspect, in the speaker device according to the second aspect, the through-hole is formed in a side surface of an outer peripheral portion of the yoke.
According to a tenth aspect, in the speaker device according to the second aspect, a lead wire drawn from the voice coil passes through the through-hole.
According to an eleventh aspect, in the speaker device according to any one of the first to tenth aspects, the voice coil has a shape selected from a circular shape, a track shape, an oval shape, and a shape composed of a plurality of linear segments and a plurality of curved segments connecting the linear segments with each other.
According to a twelfth aspect, in the speaker device according to any one of the first to eleventh aspects, the distance between the inner peripheral surface of the voice coil and the outer peripheral surface of the plate is not uniform in the peripheral direction of the voice coil.
According to a thirteenth aspect, in the speaker device according to any one of the first to twelfth aspects, the yoke includes a plurality of the through-hole, and the plurality of the through-holes are arranged at equal angular intervals on a virtual circle concentric with a centroid axis of the voice coil parallel to a vibration direction of the diaphragm.
An audio visual equipment according to a fourteenth aspect includes the speaker device according to any one of the first to thirteenth aspects. A mobile information processing apparatus according to fifteenth aspect includes the speaker device according to any one of the first to thirteenth aspects. A vehicle according to a sixteenth aspect includes the speaker device according to any one of the first to thirteenth aspects. An earphone according to a seventeenth aspect includes the speaker device according to any one of the first to thirteenth aspects.
The speaker device 10 shown in
Hereinafter, the operation of the speaker device 10 will be described. When an electric signal flows through the voice coil 6, a driving force according to a signal current is applied to the voice coil 106 in accordance with the Fleming's left-hand rule, and the diaphragm 4 vibrates, and thereby a sound is reproduced.
In the speaker device 10 of the present embodiment, assuming that the upper side in
While in
The sound from the rear surface of the diaphragm 4 can be released to the outside of the speaker device 10 through the gap-for-communication 15 formed between the voice coil 6 and the plate 1, and the through-holes 9 of the yoke 3. Therefore, the bass reproduction ability of the speaker device 10 can be prevented from being inhibited by the stiffness of air in the space at the rear surface of the diaphragm 4.
Since the magnet 2 having no hole is used as shown in
As described above, when the magnet 2 having no hole is used, the problem of stiffness of air at the rear surface of the diaphragm 4 may occur if the through-holes 9 are not provided. In the present embodiment, however, the space at the rear surface side, which is surrounded by the diaphragm 4, the voice coil 6, and the plate 1, is connected to the space surrounded by the magnet 2, the yoke 3, the magnetic fluid 7, and the voice coil 6 through the gap-for-communication 15 formed between the inner surface of the voice coil 6 and the outer peripheral surface of the plate 1, and further, connected to the space outside the speaker device 10 through the through-holes 9 formed in the yoke 3. Accordingly, air at the rear surface of the diaphragm 4 is not confined in the speaker device 10, thereby preventing the bass reproduction from being inhibited by the stiffness of air. Accordingly, it is possible to provide the speaker device 10 having high flexibility in shape, and high ability of bass reproduction.
While in
Further, since the through-holes 9 are provided to be symmetrical with respect to the center axis of the coin type speaker device 10, the pressure at the rear surface of the diaphragm 4 is also symmetrical with respect to the center axis, and thereby rolling vibration is not likely to occur. However, for example, when the through-holes 9 cannot be formed to be symmetrical with respect to the center axis of the speaker device 10 because of arrangement of terminals on a rear surface of a speaker unit including the speaker device 10 or arrangement of other members, the through-holes 9 may be formed to be asymmetrical with respect to the center axis of the speaker device 10. In addition, each through-hole 9 is a circular hole. However, each through-hole 9 may have a rectangular shape, an oval shape, a track shape (a shape obtained by combining curved lines and straight lines, like a track for athletic sports), or other shapes. Although the plurality of through-holes 9 have the same shape in
Since the operation of the speaker device 20 is identical to that of the speaker device 10, repeated description is not necessary.
In the speaker device 20, the diaphragm 4 is supported by the two suspensions 5 respectively disposed at the two short-side portions (the short-side portions of the frame 8) opposing each other in the long side direction. Therefore, as compared to a case where suspensions 5 are disposed also at the long-side portions of the frame 8, the length of the speaker device 20 in the short side direction can be reduced. Thus, it is possible to provide the speaker device having a high vertical-to-horizontal aspect ratio. Accordingly, it is possible to mount the speaker device 20 on an image display device such as a television having a narrow outer frame of a screen, which is a design trend, or on equipment in which the location of the speaker device 20 is greatly restricted.
The plate 1, the magnet 2, the side wall of the yoke 3, and the voice coil 6 each have, as viewed from the front, a shape of a rectangle whose four corners are shaped into curved lines (a shape of a rectangle whose four corners are rounded), that is, a shape having linear segments and curved segments. The magnet 2 may have a rectangular parallelepiped shape. A surface of the yoke 3 (an inner peripheral surface of the side wall), opposing the plate 1, may have a substantially quadrangular shape. In this case, however, at the corners of the side wall of the yoke 3, the magnetic fluid 7 may climb toward the upper surface or the lower surface of the yoke 3 due to capillary phenomenon. In this case, the magnetic fluid 7 in the magnetic gap may be reduced, and cannot perform its assigned duty. This situation is undesirable. Therefore, it is desired that the corners of the side wall of the yoke 3 are shaped into curved lines to prevent such capillary phenomenon. More specifically, it is desired that the radius of curvature at each corner of the side wall of the yoke 3 is 0.5 mm or more.
Each through-hole 9 is formed as a hole having a track shape (a shape obtained by combining curved lines and straight lines, like a track for athletic sports). As shown in
The plate 1 shown in
The plate 1 shown in
It is needless to say that the shape of the plate 1 having projections and recesses at the peripheral edge thereof can be applied to the circular plate 1 of the speaker device 10 according to Embodiment 1.
Regarding the suspensions 5, one suspension 5 is disposed at each of the short-side portions opposing each other in the long side direction. However, the arrangement of the suspensions 5 is not limited thereto. For example, two suspensions 5 may be disposed at each of the short-side portions opposing each other in the long side direction (i.e., four suspensions 5 in total may be disposed), or suspensions 5 may be disposed at the long-side portions opposing each other in the short side direction. Alternatively, suspensions 5 may be disposed at the curved-line portions of the diaphragm 4.
Since the operation of the speaker device is identical to that of Embodiment 1, repeated description is not necessary.
The speaker device 30 and the speaker device 31 are different from the speaker devices of Embodiments 1 and 2 in the positions of through-holes 9 provided in the yoke 3. The through-holes 9 are formed in the outer peripheral portion of the yoke 3 (the side wall rising upward from the bottom part of the yoke 3). In the speaker device 30, the entirety of each through-hole 9 is formed in the side wall of the yoke 3. In the speaker device 31, each through-hole 9 is formed extending from an outer portion of the bottom part of the yoke 3 to a lower portion of the side wall of the yoke 3. Therefore, when the speaker device 30 or 31 is directly placed on a cabinet with the bottom surface contacting the cabinet, the through-holes 9 are not closed. Accordingly, reduction in the thickness of the entire cabinet can be realized. That is, while using the magnet 2 having no hole as in Embodiments 1 and 2, the through-holes 9 are provided to prevent bass reproduction from being inhibited by the stiffness of air, and moreover, the through-holes 9 are not likely to be closed by external members.
Furthermore, the lead wire 11 drawn from the voice coil 6 may be made to pass through the through-hole 9, as in the speaker device 31 shown in
In the speaker device 40 according to Embodiment 4, in the space between the outer peripheral surface of the plate 1 and the inner peripheral surface of the voice coil 6, the magnetic fluid 7 is disposed in a part of the above space in the peripheral direction of the voice coil 6, and the gap-for-communication 15 is formed at a residual part of the voice coil 6. Further, no magnetic fluid 7 is disposed in the space between the outer peripheral surface of the voice coil 6 and the inner peripheral surface of the side wall of the yoke 3, and a gap is formed over the entire periphery. In these points, Embodiment 4 is different from Embodiments 1 to 3.
Since the operation of the speaker is identical to that of Embodiment 1, repeated description is not necessary.
Regarding the shapes of the respective components when the speaker device 40 of Embodiment 4 is viewed from the front surface side, the plate 1 has a rectangular shape, and the voice coil 6 and the frame 8 each have a track shape. As for the yoke 3, side walls of the yoke 3 rise up toward the front surface from only a pair of long sides of the rectangular bottom part of the yoke 3. No side walls are provided at the short sides of the bottom part of the yoke 3. Each side wall opposes each straight-line portion of the voice coil 6 with a gap between them. In addition, a suspension 5 is provided over the entire periphery of the diaphragm 4.
In Embodiment 4, the outer peripheral surface of the plate 1 has a pair of long-side side surfaces 1a (side surfaces at the long sides) opposing each other in the short side direction of the plate 1, and a pair of short-side side surfaces 1b (side surfaces at the short sides) opposing each other in the long side direction of the plate 1. In the space between the outer peripheral surface of the plate 1 and the inner peripheral surface of the voice coil 6, the magnetic fluid 7 is disposed outside the long-side side surfaces 1a, and the gaps-for-communication 15 are formed outside the short-side side surfaces 1b. Each gap-for-communication 15 connects the rear surface side space between the rear surface of the diaphragm 4 and the front surface of the plate 1 to the space outside the yoke 3 through the space between the outer peripheral surface of the magnet 2 and the inner peripheral surface of the yoke 3. The magnetic fluid 7 is disposed between the long-side side surfaces 1a and the straight-line portions of the voice coil 6. As for the inner peripheral surface of the voice coil 6, the curved-line portions opposing the short-side side surfaces 1b are more distant from the outer peripheral surface of the plate 1 than the straight-line portions opposing the long-side side surfaces 1a. In addition, a plurality of through-holes 9 are formed in the yoke 3 as in Embodiments 1 to 3.
According to Embodiment 4, since the magnetic fluid 7 is provided at the inner side of the voice coil 6 where the magnetic force is greater than that at the outer side of the voice coil 6, the magnetic fluid 7 can be easily arranged at the time of manufacturing the speaker device 40. In addition, since the magnetic fluid 7 is provided at the long sides of the voice coil 6, the rolling preventing effect due to viscosity can be enhanced as compared to the case of providing the magnetic fluid 7 on the short sides.
Furthermore, since the gaps-for-communication 15 are left inside the voice coil 6 while the magnetic fluid 7 is provided inside the voice coil 6, bass reproduction is prevented from being inhibited by the stiffness of air. The gaps-for-communication 15 are formed so as to have a relatively large width inside the curved-line portions of the voice coil 6. Therefore, occurrence of high acoustic impedance in the narrow air flow path between the plate 1 and the voice coil 6 is prevented, thereby providing the speaker device 40 with good high frequency characteristics.
Further, since the magnetic fluid 7 is provided not over the entire periphery of the voice coil 6, when the outer periphery of the diaphragm 4 is partially supported by the suspensions 5 as in Embodiments 1 to 3, a sound of inverse phase from the rear surface of the diaphragm 4 cancels a sound of positive phase from the front surface of the diaphragm 4. However, since the entire periphery of the diaphragm 4 is supported by the suspension 5, the sound from the rear surface of the diaphragm 4 is prevented from leaking to the front surface side of the speaker device 40, thereby preventing such sound canceling.
The speaker device 50 of the Embodiment 5 is different from Embodiment 4 in that, in the space between the outer peripheral surface of the plate 1 and the inner peripheral surface of the voice coil 6, the magnetic fluid 7 is also disposed outside portions of the short-side side surfaces 1b.
Since the operation of the speaker is identical to that of Embodiment 1, repeated description is not necessary.
Regarding the shapes of the respective components when the speaker device 50 of Embodiment 5 is viewed from the front surface side, the voice coil 6 and the frame 8 each have a rectangular shape whose four corners are rounded. In addition, the plate 1 has a planar shape in which a projection 32 is formed at each of the short-side side surfaces 1b, specifically, the projection 32 projecting outward is formed at a portion of each short-side side surface 1b. That is, the plate 1 has a planar shape in which cutouts are formed at four corners of a rectangle. In addition, As for the yoke 3, side walls rise up toward the front surface not only from the pair of the long sides of the rectangular bottom part of the yoke 3 but also from the center portions of the pair of the short sides thereof. The side wall at each short side is provided corresponding to each projection 32. The side wall at each short side is provided outside a front end surface of each projection 32 so as to have substantially the same length as the front end surface. The side wall at each short side opposes the outer peripheral surface of the voice coil 6 in the short side direction, with a gap between them.
In the space between the outer peripheral surface of the plate 1 and the inner peripheral surface of the voice coil 6, the gaps-for-communication 15 are formed by the cutouts of the plate 1, and the magnetic fluid 7 is disposed at portions other than the cutouts. The magnetic fluid 7 is disposed outside the top end surfaces of the projections 32 as well as outside the long-side side surfaces 1a.
According to the present embodiment, the magnetic fluid 7 is disposed not only at the long sides of the voice coil 6 but also at the short sides thereof. Therefore, the rolling preventing effect due to viscosity can be enhanced as compared to the case of providing the magnetic fluid 7 at only the long sides of the voice coil 6. Accordingly, more stable vibration of the diaphragm 4 can be realized.
Further, in order to facilitate mounting of the speaker device 10 in the cabinet 21, as shown in
A cushioning material 22 is disposed on the front surface of the speaker device 10. Thus, the speaker device 10 is in close contact with the cabinet 21, thereby preventing a reduction in the bass reproduction ability due to leakage of air from the cabinet 21.
While the cabinet 21 shown in
a) and 9(b) each show an example of the speaker device 10 mounted to a mobile information terminal apparatus. In
In the case of
In Equation 1, c represents a sound velocity, Vc represents a volume of a space connected to the sound emitting hole, Vp represents an equivalent volume of the sound emitting hole (including open end correction), and Sn represents an equivalent cross-sectional area of the sound emitting hole.
In
Although the cabinet 21 serves as a part of a casing of the mobile information terminal, the cabinet 21 may be configured separately from the casing.
Specifically, the cushioning material 22 may be an elastomer such as rubber or urethane, or a resin. Although the cushioning material 22 is used as means for tightly adhering the speaker device 10 to the cabinet 21 by its repelling force, a force for tightly adhering the speaker device 10 to the cabinet 21 may be applied by using electrical connecting means such as a spring terminal.
Even with an apparatus having a limited volume for mounting, such as the image display device, when the speaker device 10 is mounted to the image display device 203, reproduction is stably enabled in a wide frequency range. Regarding the mount direction of the speaker device 10, when being mounted with respect to a sound hole provided on a housing, the diaphragm may be directed toward the sound hole side or the through-hole 9 may be directed toward the sound hole side.
The image display device 203 is often designed such that the width of an outer frame provided around the screen 202 is reduced as much as possible. In this case, when the sound hole of the speaker device 10 is provided at the rear surface of the image display device 203, the sound quality is degraded. Therefore, the sound hole is desirably provided at the front surface of the image display device 203. In this case, the speaker device 10 needs to be mounted to the narrow outer frame. As described for Embodiments 1 to 5, since the thinner and slimmer speaker device 10 can be realized as compared with the conventional art, the image display device 203 can be designed so as to have the narrower outer frame. Accordingly, it is possible to realize the image display device 203 having both good design and high sound quality.
Hitherto, a large-size speaker has been required to realize reproduction in a wide frequency range, particularly, reproduction of bass. Since the speaker device 10 using the magnetic fluid 7 according to the present embodiment can realize a speaker that is compact but can reproduce bass sound, it is possible to realize the same acoustic characteristics as those of a conventional one with the speaker smaller in size or weight than the conventional one. This leads to size reduction or weight reduction of the entirety of a vehicle. Further, improvement of comfort due to an enlarged interior space and improvement of fuel consumption due to size reduction or weight reduction of the vehicle body are possible.
Regarding the mount direction of the speaker device 10, when being mounted with respect to a sound hole provided on a housing of the door of the automobile, the diaphragm may be directed toward the sound hole side or the through-hole 9 may be directed toward the sound hole side.
By the way, conventionally, a speaker device (receiver) used in an inner earphone has been desired to have a small diameter in order to improve wearing sensation. In order to realize a speaker device having a small diameter, a small magnet with a hole has been needed. However, it is difficult to manufacture such a magnet. In contrast, when the above-mentioned speaker device is mounted in an inner phone, the diameter of the speaker device is not restricted by the magnet. Therefore, it is possible to provide a compact inner earphone capable of reproducing richer bass sound than ever. Regarding the mount direction of the speaker device 10, when being mounted with respect to a sound hole provided on a housing of the inner earphone, the diaphragm 4 may be directed toward the sound hole side or the through-hole 9 may be directed toward the sound hole side.
The ear chip 207 shown in
Although in Embodiment 9 the speaker device 10 is applied to an inner earphone, the speaker device 10 may be applied to a head set, a head phone, or an hearing aid.
A speaker device according to the present invention is thin or slim, and yet capable of reproducing sound in a wide frequency range, and capable of operating stably. Therefore, the speaker device is solely useful as a compact speaker with good sound quality, or the like. Further, in equipment to which a speaker is mounted, the speaker device is useful as a device for realizing downsizing and good sound quality, or the like.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2012-277795 | Dec 2012 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2013/007466 | 12/19/2013 | WO | 00 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2014/097632 | 6/26/2014 | WO | A |
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| Number | Date | Country | |
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| 20150016660 A1 | Jan 2015 | US |
