close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JP2012074776

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2012074776
To provide a thin speaker device capable of emitting reproduction sound of relatively large
volume. SOLUTION: The drive unit 20 is provided with a stationary unit 10, a drive unit 20, and a
vibrating body 30, and the drive unit 20 is provided with a voice coil 21 having an annular shape
in cross section intersecting with the vibration direction and a magnetism. The vibrating body 30
includes a plurality of diaphragms 31 supported by the stationary unit 10 in a freely vibrating
manner, and a first diaphragm 31-of the plurality of diaphragms 31 facing each other. The voice
coil is provided between the first diaphragm 31 and the second diaphragm 31-2, and the first
diaphragm 31-1 and the second diaphragm 31-2 are linked and interlocked so as to approach or
separate from each other. 21 includes a vibration direction converter 40 that vibrates the first
diaphragm 31-1 and the second diaphragm 31-2 in a direction different from the vibration
direction 21. The vibration direction converter 40 includes a rigid connector 50. , And is
connected to the voice coil 21. [Selected figure] Figure 2
Speaker device
[0001]
The present invention relates to a speaker device.
[0002]
A dynamic speaker device is known as a general speaker device (see, for example, Patent
Document 1).
12-04-2019
1
For example, as shown in FIG. 1, this dynamic type speaker device is joined to a frame 3J, a coneshaped diaphragm 21J, an edge 4J for supporting the diaphragm 21J on the frame 3J, and an
inner peripheral portion of the diaphragm 21J. The voice coil bobbin 610J, the damper 7J
supporting the voice coil bobbin 610J on the frame 3J, the voice coil 611J wound around the
voice coil bobbin 610J, the yoke 51J, the magnet 52J, and the plate 53J, and the voice coil 611J
is disposed. And a magnetic circuit in which a magnetic gap is formed. In this speaker device,
when an audio signal is input to the voice coil 611J, the Lorentz force generated in the voice coil
611J in the magnetic gap vibrates the voice coil bobbin 610J, and the vibration drives the
diaphragm 21J.
[0003]
JP-A-8-149596 (FIG. 1)
[0004]
For example, as shown in FIG. 1, the voice coil 611J is disposed on the opposite side of the
acoustic radiation side of the diaphragm 21J in the general dynamic type speaker device
described above, and the vibration direction of the voice coil 611J and the voice coil bobbin 610J
The vibration direction of the diaphragm 21J is configured to be the same.
In such a speaker device, a region for vibrating the diaphragm 21J, a region for vibrating the
voice coil bobbin 610J, a region for arranging a magnetic circuit, etc. are in the vibration
direction (acoustic radiation direction) of the diaphragm 21J. Since it is to be formed along, the
overall height of the speaker device has to be relatively large.
[0005]
In detail, as shown in FIG. 1, the size of the speaker device along the vibration direction of the
diaphragm 21J is the size along the vibration direction of the cone-shaped diaphragm 21J and
the diaphragm 21J is supported by the frame 3J. Voice coil bobbin height (b) from the junction
of diaphragm 21J and voice coil bobbin 610J to the upper end of voice coil 611J, total height of
voice coil (c), lower end of voice coil 611J The magnetic circuit mainly comprises the magnet
height (d) and the magnetic circuit mainly comprises the thickness (e) of the yoke 51J, which
corresponds to the height from the upper surface to the upper surface of the yoke 51J. In such a
12-04-2019
2
speaker device, in order to secure a sufficient vibration stroke of the diaphragm 21J, it is
necessary to secure sufficient heights of a, b, c and d described above, and sufficient
electromagnetic force. Since it is necessary to secure the heights of c, d, and e described above in
order to obtain the same, the total height of the speaker device must be large particularly in a
high volume compatible speaker device.
[0006]
As described above, in the conventional speaker device, the vibration direction of the voice coil
bobbin 610J and the vibration direction of the diaphragm 21J are in the same direction. In order
to secure the vibration stroke of the voice coil bobbin 610J, the overall height of the speaker
device becomes large, and it is difficult to achieve the thinning of the device. That is, there is a
problem that it is difficult to achieve both thinning of the device and increase in volume.
[0007]
The present invention takes an example of the problem to address such a problem. That is, there
is provided a thin speaker device capable of emitting reproduction sound of relatively large
volume, that the vibration of the voice coil can be directionally changed and efficiently
transmitted to the diaphragm, and thin and nondirectional. It is an object of the present invention
to obtain a loudspeaker device and the like.
[0008]
In order to achieve such an object, the speaker device according to the present invention at least
has the following configuration. A stationary unit, a drive unit, and a vibrating body, wherein the
drive unit includes a voice coil having an annular shape in cross section intersecting the vibration
direction, and a magnetic circuit having a magnetic gap in which the voice coil is disposed. The
vibration body may be a vibration provided between a first diaphragm and a second diaphragm
facing each other among a plurality of diaphragms which are vibratably supported by the
stationary portion and the plurality of diaphragms. A direction conversion unit is provided, and
the vibration direction conversion unit interlocks the first diaphragm and the second diaphragm
so as to be close to or separated from each other, and is different from the vibration direction of
the voice coil A speaker device characterized in that the first diaphragm and the second
diaphragm are vibrated in a direction, and the vibration direction converter is connected to the
12-04-2019
3
voice coil via a rigid connector.
[0009]
It is explanatory drawing of a prior art. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory
drawing (sectional view) which showed the whole structure of the speaker apparatus which
concerns on embodiment of this invention. It is an explanatory view showing an example of a
form of a stationary part of a speaker apparatus concerning an embodiment of the present
invention. It is an explanatory view showing an example of an assembly of a speaker device
concerning an embodiment of the present invention. Explanatory drawing which showed the
state which attached the drive part in drive part support part in embodiment of this invention
(the figure (a) is a front view, the figure (b) is XX sectional drawing, the figure (c) It is YY
sectional drawing). It is an exploded view of the drive part attached to the drive part support part
in embodiment of this invention. It is an explanatory view showing a modification of a voice coil
or a voice coil supporter in an embodiment of the present invention. It is an explanatory view
showing the modification of the speaker apparatus concerning the embodiment of the present
invention. It is explanatory drawing which showed the other modification of the speaker
apparatus based on embodiment of this invention. It is explanatory drawing which showed the
other modification of the speaker apparatus based on embodiment of this invention. It is an
explanatory view showing an application example of a speaker device concerning an embodiment
of the present invention.
[0010]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings. FIG. 2 is an explanatory view (cross-sectional view) showing the overall configuration
of the speaker device according to the embodiment of the present invention. The speaker device
1 includes a stationary unit 10, a drive unit 20, and a vibrating body 30. The stationary unit 10 is
a part that is relatively stationary with respect to the vibration of the drive unit 20 and the
vibrating body 30, and is a part that supports the drive unit 20 and the vibrating body 30. The
stationary portion is not intended to be completely stationary. For example, the stationary
portion may be stationary as long as the diaphragm 30 can be supported, and the vibration
generated when driving the speaker device 1 is propagated. The vibration may propagate to the
whole stationary part. The stationary unit 10 referred to here corresponds to a frame, which will
be described later, a part of the magnetic circuit 23, an attached portion where the speaker
device 1 is attached, and the like. The driving unit 20 is a part of the speaker device 1 that
generates a driving force that causes the vibrating body 30 to vibrate. The vibrating body 30 is a
12-04-2019
4
part of the speaker device 1 that vibrates by the driving force of the drive unit 20.
[0011]
The drive unit 20 includes a voice coil 21 and a magnetic circuit 23 having a magnetic gap 23G
in which the voice coil 21 is disposed. The voice coil 21 has a cross-sectional shape which is an
annular form. Here, the cross section of the voice coil 21 is a surface extending in a direction
intersecting the vibration direction (the X-axis direction in the drawing) of the voice coil 21 itself.
[0012]
The voice coil 21 is configured of, for example, a linear conductive member wound around the
illustrated X axis. In the illustrated example, the conductive member is supported by the annular
voice coil support portion 22. However, the voice coil 21 may be configured substantially only of
the conductive member and may have an annular rigidity. The conductive member may be a
conductive wire having a start point and an end point, a metal member having a tubular shape, or
a metal film, and known materials can be used.
[0013]
The voice coil 21 may be configured by one conductive member or may be configured by a
plurality of conductive members. When the voice coil 21 is configured by a plurality of
conductive members, for example, the other wire may be wound around one of the wound
conductive wires to configure the voice coil 21 (dual voice coil). The voice coil 21 may have a
voice coil support 22. The voice coil support 22 may be made of a known resin material. In order
to reduce the weight of the voice coil 21, the voice coil support portion 22 may be formed of a
cylindrical resin member, and a conductive layer as a conductive member may be formed on the
outer peripheral side surface of the voice coil support portion 22. The voice coil support 22 may
have rigidity in the vibration direction of the voice coil 21.
[0014]
12-04-2019
5
The speaker device 1 may be provided with a lead wire (not shown) so as to electrically connect
the voice coil 21 to the outside. The lead wire may be formed of a linear conductive member. In
addition, a conductive member may be provided on the surface or inside of a damper described
later, and this conductive member may be used as a lead wire. When a voice signal is input to the
voice coil 21 via the lead wire or directly, the voice current flowing through the voice coil 21
crosses the magnetic flux of the magnetic gap 23G to generate Lorentz force, which causes the
vibrating body 30 to vibrate. become.
[0015]
The magnetic circuit 23 includes a yoke 23A, a magnet 23B, and a plate 23C in the illustrated
example, and the yoke 23A includes an outer peripheral cylindrical portion 23A1, a bottom
portion 23A2, and a column portion 23A3. A magnet 23B is magnetically joined to the column
portion 23A3, and a magnetic gap 23G is formed between the outer peripheral surface of the
plate 23C and the outer peripheral cylindrical portion 23A1 of the yoke 23A. The yoke 23A and
the column 23A3 may be configured as separate members, or may be integrally configured. The
column 23A3 may be a magnet, or the magnet 23B and the column 23A3 may be integrated into
a magnet. The yoke 23A, the magnet 23B, and the plate 23C, which are constituent members of
the magnetic circuit 23, are made of magnetic material. The magnet 23B may be a rare earth
magnet or a ferrite magnet, and a known magnetic material can be used. Although a single
magnet is shown in the illustrated example, a plurality of magnets may be used in consideration
of magnetic efficiency and the like. When a plurality of magnets are used, a rare earth based
magnet and a ferrite based magnet may be used in combination. The illustrated example is a socalled internal magnetic type magnetic circuit, but is an external magnetic type magnetic circuit,
a magnetic circuit using both the internal and external magnetic type magnetic circuits, and a
repulsive magnetic circuit using a plurality of magnets. The form of the magnetic circuit is not
particularly limited.
[0016]
In the illustrated example, in the drive unit 20, a pair of voice coils 21, 21 and a pair of magnetic
circuits 23, 23 are disposed opposite to each other along the X-axis direction. The vibrations of
the pair of voice coils 21 are synchronized by the input of substantially the same audio signal,
and vibrate in opposite directions along the X-axis direction. As an example of an input method
of an audio signal, it is possible to connect a pair of voice coils so as to be electrically parallel to
the outside.
12-04-2019
6
[0017]
The vibrator 30 includes a diaphragm 31 and a vibration direction converter 40. The diaphragm
31 is vibratably supported by the stationary unit 10 via the edge 33. The vibration direction
conversion unit 40 has a function of being partially supported by the stationary unit 10 to
change the direction of the vibration of the voice coil 21 and transmit it to the diaphragm 31.
[0018]
In the illustrated example, the speaker device 1 includes a plurality of diaphragms 31, and the
first diaphragm 31-1 and the second diaphragm 31-2 are disposed in a state of facing each other.
The first diaphragm 31-1 and the second diaphragm 31-2 have substantially the same form. The
first diaphragm 31-1 and the second diaphragm 31-2 are disposed substantially in plane
symmetry with each other. Each diaphragm 31 includes a flat portion 31A and an annular
portion 31B surrounding the flat portion 31A, and the annular portion 31B has a top 32
projecting along the vibration direction (Z-axis direction) of the diaphragm 31. It has rigidity in
the direction intersecting with the vibration direction (X-axis direction) of the voice coil 21. The
top 32 provided on the annular portion 31B includes a first top 32-1 and a second top 32-2. The
first top 32-1 has a shape that protrudes toward the vibration direction converter 40. The second
top 32-2 is disposed between the first top 32-1 and the flat portion 31A, and has a shape that
protrudes in the acoustic radiation direction.
[0019]
The vibration direction converter 40 is provided between the facing first diaphragm 31-1 and the
second diaphragm 31-2. Further, the vibration direction conversion unit 40 connects the first
diaphragm 31-1 and the second diaphragm 31-2 and interlocks them so as to approach or
separate from each other, which is different from the vibration direction of the voice coil 21. The
first diaphragm 31-1 and the second diaphragm 31-2 are vibrated in a direction (in the
illustrated example, the Z-axis direction).
[0020]
12-04-2019
7
The vibration direction converter 40 has a link portion 41 and a joint 42. The link portion 41 is
provided with joints 42 at both ends thereof. In addition, the vibration direction conversion unit
40 is a voice coil connecting portion 43 connected directly or through another member to the
voice coil 21 and a diaphragm connecting portion 44 connected directly to the diaphragm 31
through another member. , And a stationary portion connecting portion 45 which is coupled to
the stationary portion 10 directly or through another member. The other member is an adhesive
or a rigid connecting portion 50 described later. The link portion 41 here is a portion of the
vibration direction conversion portion 40 having rigidity, and the joint portion 42 is a portion of
the vibration direction conversion portion 40 that supports or links the link portion with respect
to other portions so as to be changeable. is there. In addition, the voice coil connecting portion
43, the diaphragm connecting portion 44, and the stationary portion connecting portion 45 have
rigidity.
[0021]
The link portion 41 includes a first link portion 41-1 connecting the voice coil 21 and the
diaphragm 31, and a second link connecting the first link portion 41-1 to the stationary unit 10
so as to be changeable in angle. A portion 41-2 is provided.
[0022]
The voice coil connecting portion 43 is connected to one end of the first link portion 41-1 via the
joint portion 42.
The diaphragm connecting portion 44 is connected to the other end of the first link portion 41-1
via the joint portion 42. One end of the second link portion 41-2 is connected to the middle
portion of the first link portion 41-1 via the joint portion 42. The other end of the second link
portion 41-2 is connected to the stationary portion connection portion 45 via the joint portion
42.
[0023]
A joint portion 42 provided between the first link portion 41-1 and the voice coil connection
portion 43 is referred to as a first joint portion 42-1. The joint portion 42 provided between the
second link portion 41 and the stationary portion connection portion 45 is referred to as a
second joint portion 42-2. The positions of the first joint 42-1 and the second joint 42-2 are
12-04-2019
8
substantially the same height in the vibration direction (Z-axis direction) of the diaphragm 31.
[0024]
The link portion 41 of the vibration direction converter 40 is configured to be substantially
symmetrical in the horizontal direction and in the vertical direction in the illustrated example. A
parallel link is formed by the link portion 41A and the link portion 41B. Further, the link portions
41A or the link portions 41B which are disposed substantially symmetrically and vertically
symmetrically are disposed in a pantograph shape. According to this, when the pair of voice coil
connecting portions 43, 43 vibrate in the direction opposite to each other along the X-axis
direction by the synchronous vibration of the pair of voice coils 21, 21, the link portion 41A and
the link portion 41B substantially The angle will be changed while maintaining the parallel state.
Furthermore, vibration in the opposite direction along the X-axis direction of the pair of voice
coil connecting portions 43, 43 is converted to vibration in the opposite direction along the Zaxis direction of the pair of diaphragm connecting portions 44, 44 Be done.
[0025]
The vibration direction converter 40 is connected to the voice coil 21 via the rigid connector 50.
Specifically, the voice coil connecting portion 43 of the vibration direction converter 40 is
connected to the voice coil 21 or the voice coil support 22 supporting the voice coil 21 via the
connecting portion 50.
[0026]
The connecting portion 50 includes a rigid attachment surface 51, a first cylindrical connecting
portion 52, and a second cylindrical connecting portion 53. The rigid attachment surface 51 has
an attachment surface 51 a along a direction intersecting the vibration direction of the voice coil
21. The first tubular coupling portion 52 is coupled to the voice coil coupling portion 43. In
detail, the inner circumferential surface of the first tubular coupling portion 52 is in contact with
the outer circumferential surface of the voice coil coupling portion 43. Thereby, the first
cylindrical connecting portion 52 arranges the voice coil connecting portion 43 at a prescribed
position with respect to the voice coil 21. The second tubular connector 53 is connected to the
voice coil 21. In detail, the outer peripheral surface of the second cylindrical connecting portion
53 is in contact with the inner peripheral surface of the voice coil support portion 22. As a result,
12-04-2019
9
the second tubular coupling portion 53 arranges the voice coil support portion 22 at a
prescribed position with respect to the voice coil coupling portion 43.
[0027]
The relative positional relationship between the voice coil 21 and the voice coil connecting
portion 43 in the vibration direction (Z-axis direction) of the diaphragm 31 is defined by the
connecting portion 50. Further, the relative positional relationship between the voice coil 21 and
the voice coil connecting portion 43 in the vibration direction (X-axis direction) of the voice coil
21 is determined by the connecting portion 50, the voice coil support portion 22, or the voice
coil connecting portion 43. Defined by the length of The angle of the link portions 41A, 41B and
41-2 with respect to the vibration direction of the voice coil 21 is the length of the connecting
portion 50, the voice coil support portion 22, or the connecting portion 43 for voice coil in the
vibration direction of the voice coil 21. Defined by The angles of the link portions 41A, 41B and
41-2 with respect to the vibration direction of the voice coil 21 are appropriately changed in
accordance with the amplitude of the diaphragm 31.
[0028]
The reinforcement part 53-1 (refer FIG. 5) is provided in the inner side of the 2nd cylindrical
connection part 53 which the connection part 50 has. By providing this reinforcing portion 53-1,
the second cylindrical connecting portion can have rigidity in the vibration direction of the voice
coil 21. In addition, the outer peripheral side surface of the voice coil 21 or the voice coil support
portion 22 and the inner side surface of the second cylindrical connecting portion 53 may be
bonded by a bonding member (adhesive). A concave adhesive reservoir (not shown) may be
provided on the inner side surface of the second cylindrical connecting portion 53. By providing
a concave adhesive storage portion, the adhesive protrudes from the voice coil 21, the voice coil
support portion 22, or the second cylindrical connection portion 53, a member that constitutes
the speaker device 1 (damper, leader line, etc. Can be prevented from adhering to the protruding
adhesive and not being able to play a role, and bonding to the voice coil 21, the voice coil
supporting portion 22, and the second cylindrical connecting portion 53, and the like.
[0029]
In the vibration direction of the voice coil 21 (in the X-axis direction in the figure), the outer
12-04-2019
10
peripheral portion 31C of the diaphragm 31 is disposed at substantially the same position with
respect to the connecting portion 50 or inside the speaker device 1 ing. When the speaker device
1 is thinned, the diaphragm 31 and the connection portion 50 and the voice coil 21 (or the voice
coil support portion 22) are disposed in proximity to each other. For this reason, when the
diaphragm 31 moves downward, the diaphragm 31 and the connecting portion 50 and the like
easily come into contact with each other. In order to avoid this, the connecting portions 50 and
the like are disposed outside of the outer peripheral portion of the diaphragm 31, or at
substantially the same positions as the connecting portions 50. This can avoid contact with other
members when the diaphragm 31 vibrates to a large extent.
[0030]
Furthermore, the distance (Z1) between the outer peripheral portion 31C of the diaphragm 31
and the first top portion 32-1 in the vibration direction of the diaphragm 31 (the Z-axis direction
shown) is the connection between the outer peripheral portion 54 of the connecting portion 50
and the voice coil. The distance to the portion 43 (Z2) or the distance (Z3) between the outer
peripheral side surface of the voice coil 21 and the voice coil connecting portion 43 is larger.
Thus, even when the diaphragm 31 vibrates largely downward, contact between the diaphragm
31 and the connecting portion 50 can be avoided.
[0031]
The stationary portion 10 includes an outer peripheral support portion 11 supporting the first
diaphragm 31-1, the second diaphragm 31-2, and the drive portion 20, and an inner support
portion 14 supporting the vibration direction converter 40. There is.
[0032]
FIG. 3 is an explanatory view showing an example of the stationary portion of the speaker device
according to the embodiment of the present invention.
The stationary part 10 includes a first part 10A having a first outer peripheral frame 13-1, a
second part 10B having a second outer peripheral frame 13-2, a bridging part 15 and a driving
part support part 16 And a third component 10C having the above-mentioned components along
the vibration direction of the diaphragm 31 and assembled. The first outer peripheral frame 13-1
supports the first diaphragm 31-1, and the second outer peripheral frame 13-2 supports the
12-04-2019
11
second diaphragm 31-2. The same figure (a) shows the second part 10B (the first part 10A also
has almost the same form), the same figure (b) shows the third part 10C, and the same figure (c)
shows the same. The drive support portion 16 is shown disposed between one part 10A and the
second part 10B. The first component 10A, the second component 10B, and the third component
10C may have rigidity in the vibration direction of the diaphragm.
[0033]
The first, second, and third parts 10A, 10B, and 10C each include an outer peripheral support
portion 11. The inner support portion 14 protrudes from the outer peripheral support portion 11
of the third component 10C toward the vibration direction conversion portion 40 in the
illustrated example, and has rigidity in the vibration direction of the diaphragm 31. The inner
support portion 14 protrudes from two portions of the outer peripheral support portions 11 and
11 disposed opposite to each other, and serves as a bridge portion 15 that bridges the two
portions. The bridge portion 15 includes a reinforcing portion 15-1 extending from one outer
peripheral wall 12 to the other outer peripheral wall 12. The reinforcing portion 15-1 has a
convex cross-sectional shape. The bridge portion 15 has rigidity in the vibration direction of the
diaphragm 31 by including the reinforcing portion 15-1 in the bridge portion 15. The inner
support portion 14 includes an attachment portion 14-1 to which a part of the vibration
direction conversion portion 40 is attached. Specifically, the mounting portion 14-1 is inserted
into a hole (not shown) provided in the stationary portion connecting portion 45 of the vibration
direction converter 40. The vibration direction converter 40 is connected to the bridge 15 by
fitting the mounting portion 14-1 and the stationary portion connecting portion 45.
[0034]
As shown in FIG. 3 (b), the outer peripheral support portion 11 is provided with an outer
peripheral wall portion 12 having a wall surface 12 h along the vibration direction of the
diaphragm 31. The outer peripheral wall portion 12 is provided in a pair at both ends of the
bridge portion 15 in the illustrated example. The stationary unit 10 includes a plurality of outer
peripheral wall portions 12. The plurality of outer peripheral wall portions 12 are disposed so as
to surround the vibration direction converter 40.
[0035]
12-04-2019
12
As shown in FIG. 3A, the outer peripheral support portion 11 is provided on the first outer
peripheral frame portion 13-1 provided on the upper end portion 12 a side of the outer
peripheral wall portion 12 and on the lower end portion 12 b side of the outer peripheral wall
portion 12. And a second outer peripheral frame 13-2. The first outer peripheral frame portion
13-1 supports the first diaphragm 31-1 via the first edge 33-1, and the second outer peripheral
frame portion 13-2 generates a second vibration. The plate 31-2 is supported via the second
edge 33-2.
[0036]
In addition, the first outer peripheral frame 13-1 and the second outer peripheral frame 13-2
include the opening 11-1 in which the diaphragm 31 and the edge 33 are disposed. In the
illustrated example, an opening 11-1 having an elliptical planar shape is shown. If necessary, the
opening 11-1 may have a rectangular planar shape, a track shape (a shape defined by a pair of
straight portions and a pair of curved portions), or the like. The planar shapes of the diaphragm
31 and the edge 33 may be changed as appropriate in accordance with the shape of the opening.
[0037]
The rectangular shape in the present application includes an oval shape, an elliptical shape, and a
track shape.
[0038]
As shown in FIG. 1, the magnetic circuit 23 is provided between the first outer peripheral frame
13-1 and the second outer peripheral frame 13-2.
In the illustrated example, the bridge portion 15 and the drive portion support portion are
provided between the first component 10A having the first outer peripheral frame 13-1 and the
second component 10B having the second outer peripheral frame 13-2. And a third part 10C
having the fourteenth. Further, the magnetic circuit 23 is supported by the drive support portion
16 of the third component 10C. Further, the drive portion support portion 16 also supports the
voice coil 21 via a damper. Specifically, as shown in FIG. 3C, the drive unit support 16 includes
an opening 16-1. A portion of the voice coil 21, a portion of the damper, and a portion of the
magnetic circuit 23 are disposed in the opening 16-1.
12-04-2019
13
[0039]
FIG. 4 is an explanatory view showing an assembly example of the speaker device according to
the embodiment of the present invention. The first part 10A is a part having a first outer
peripheral frame 13-1. A first diaphragm 31-1 is attached to the first outer peripheral frame 131 via a first edge 33-1. The second part 10B is a part having a second outer peripheral frame 132. A second diaphragm 31-2 is attached to the second outer peripheral frame 13-2 via a second
edge 33-2. Moreover, the vibration direction converter 40 is attached to the third component
10C. The vibration direction converter 40 is provided with a pair of stationary portion
connecting portions 45, 45. The vibration direction conversion unit 40 is attached to the third
component 10C by joining the pair of stationary portion connection portions 45, 45 to both the
front and back sides of the inner support portion 14. The third component 10C includes a drive
support portion 16, and the drive circuit support portion 16 supports the magnetic circuit 20
and the voice coil 21 or the voice coil support portion 22.
[0040]
At the time of assembly, the voice coil 21 or the voice coil support 22 is connected to the voice
coil connecting portion 43 of the vibration direction converter 40 via the connecting portion 50.
At this time, the voice coil connecting portion 43 is connected to the first cylindrical connecting
portion 52 of the connecting portion 50. The voice coil 21 or the voice coil support 22 is
connected to the second cylindrical connection 53 of the connection 50. When connecting the
voice coil 21 or the voice coil support portion 22 and the second cylindrical connection portion
53, the end of the voice coil 21 or the voice coil support portion 22 is brought into contact with
the attachment surface 51a of the connection portion 50. Then, the second cylindrical
connecting portion 53 is attached to the inside of the voice coil 21 or the voice coil support 22.
Further, when connecting the first cylindrical connecting portion 52 and the voice coil
connecting portion 43, the end of the voice coil connecting portion 43 is attached to the inside of
the first cylindrical connecting portion 52.
[0041]
The first component 10A and the second component 10B are joined together with the third
component 10C interposed therebetween. The back surface of the first diaphragm 31-1 is joined
12-04-2019
14
to the diaphragm connecting portion 44 of the vibration direction converter 40. The outer edge
portion 16a of the drive portion support portion 16 in the third component 10C is attached to
the concave fitting portion 13a in the first component 10A. Similarly, the rear surface of the
second diaphragm 31-2 is joined to the diaphragm connection portion 44 of the vibration
direction converter 40. The outer edge portion 16a of the drive portion support portion 16 in the
third component 10C is attached to the concave fitting portion 13a in the second component
10B.
[0042]
FIG. 5 is an explanatory view showing a state where the drive unit is attached to the drive unit
support (the same figure (a) is a front view, the same figure (b) is a cross-sectional view taken
along the line X-X, and Y cross-sectional view). The voice coil 21 has a cross-sectional shape
which is a rectangular shape defined by the major axis 21a and the minor axis 21b. The cross
section of the voice coil 21 is a surface extending in a direction intersecting the vibration
direction of the voice coil 21 (the X-axis direction in FIG. 1). The direction of the short axis 21 b
of the voice coil 21 is along the vibration direction of the diaphragm 31. The magnetic circuit 23
has a rectangular cross-sectional shape defined by the major axis 21a and the minor axis 21b.
This cross section is a surface extending in a direction intersecting the vibration direction of the
voice coil 21 (the X-axis direction in FIG. 1). The direction of the short axis 21 b of the magnetic
circuit 23 is along the vibration direction of the diaphragm 31. The speaker device 1 includes a
band-shaped damper 24 provided along the long axis 21 a of the voice coil 21. The voice coil 21
or the voice coil support 22 is vibratably supported by the drive unit support 16 by the damper
24. The drive part 20 comprises the speaker apparatus 1 as an integral unit which attached the
magnetic circuit 23 and the voice coil 21 (voice coil support part 22) to the drive part support
part 16 like illustration.
[0043]
The speaker device 1 may include a plurality of magnetic circuits 23. In the illustrated example, a
pair of magnetic circuits 23 is disposed along the major axis 21a. By arranging the plurality of
magnetic circuits 23 along the direction of the long axis 21a, for example, the speaker device 1
can be made thinner for the speaker device provided with a cylindrical voice coil, and the
electromagnetism acting on the voice coil 21 can be realized. The power can be relatively large.
Therefore, the driving force of the speaker device 1 can be improved. The speaker device 1 may
include a plurality of voice coils 21 or a voice coil support 22 corresponding to the plurality of
magnetic circuits 23 included in the speaker device 1. The plurality of voice coils 21 or the
12-04-2019
15
plurality of voice coil support portions 22 can be disposed along the direction of the long axis 21
a in order to reduce the thickness of the speaker device 1.
[0044]
FIG. 6 shows an exploded view of the drive attached to the drive support. An opening 16 b is
provided at the center of the drive support portion 16, and a magnetic circuit holding portion 16
c protrudes outside the opening 16 b. A magnetic circuit 23 composed of a yoke 23A (including
an outer peripheral cylindrical portion 23A1, a bottom surface portion 23A2 and a column
portion 23A3), a magnet 23B and a plate 23C is held inside the magnetic circuit holding portion
16c. The voice coil 21 or the voice coil support 22 is inserted into the opening 16 b, and the
voice coil 21 supported by the damper 24 described above is held in the magnetic gap of the
magnetic circuit 23. The connecting portion 50 is attached to the end of the voice coil 21 or the
voice coil support portion 22 as described above.
[0045]
FIG. 7 shows a modification of the voice coil or the voice coil support. In this example, the voice
coil support portion 22 is provided with an annular reinforcing portion 22a on the inner side
surface thereof. The reinforcing portion 22a may be a rib-like convex portion as shown, or a
frame member with high rigidity may be attached to that portion. Also, instead of the voice coil
support portion 22, the voice coil 21 itself may be a rigid annular body, and the same
reinforcement portion may be provided on the inner side. Further, when the speaker device 1
includes the plurality of magnetic circuits 23, the frame material may be disposed corresponding
to the arrangement position of the plurality of magnetic circuits 23. Specifically, a frame material
may be disposed between the plurality of plates 23C provided in the plurality of magnetic
circuits 23 and inside the voice coil 21 or the voice coil support portion 22. By providing such a
reinforcing portion 22a, it is possible to suppress the deformation of the annular voice coil 21 or
the voice coil support portion 22.
[0046]
FIG. 8 shows a modification of the speaker device according to the embodiment of the present
invention. The speaker device 1A vibrates the diaphragm 31 by the drive unit 20 including the
magnetic circuit 23 in the same manner as the embodiment described above, and the diaphragm
12-04-2019
16
31 is the first vibration unit 34, and the first vibration unit 34. And a second vibration unit 35
surrounding the The first vibrating portion 34 includes a plurality of recesses 34 a arranged in a
direction intersecting with the vibrating direction of the voice coil 21, and an annular shape is
provided between the first vibrating portion 34 and the second vibrating portion 35. The recess
36 is provided. The diaphragm 31 is supported by the stationary unit 10 via the edge 33. The
edge 33 is connected to the stationary unit 10 (frame) by the edge connecting unit 33a. By the
diaphragm 31 including the concave portions 34 a and 36, the diaphragm 31 can have rigidity in
the vibration direction of the diaphragm 31. Further, the diaphragm 31 may be provided with a
convex portion in place of the concave portions 34 a and 36, and is not particularly limited as
long as the diaphragm 31 can be provided with rigidity.
[0047]
The edge 33 comprises a radially extending, concave or convex reinforcement 37. The crosssectional shape of the reinforcing portion in the circumferential direction of the edge 33 may be
curved along the cross-sectional shape of the edge 33. In the illustrated example, a plurality of
concave reinforcing portions are arranged side by side along the circumferential direction of the
edge 33. The reinforcing portion 37 is provided at the corner of the edge 33 in the illustrated
example. By providing the reinforcing portion 37 on the edge 33, it is possible to suppress the
occurrence of the rolling phenomenon in the voice coil 21. Further, by providing the reinforcing
portion 37 along the radial direction of the edge 33, the rigidity of the edge 33 in the radial
direction can be improved. Moreover, the edge 33 can expand-contract along the circumferential
direction by making the cross-sectional shape of the reinforcement part 37 in the circumferential
direction of the edge 33 curved. In the circumferential direction of the edge 33, the edge 33 is
flexible. As a result, the edge 33 has flexibility in the vibration direction of the diaphragm 31, and
can make the lowest resonance frequency (F0) relatively small.
[0048]
FIG. 9 shows another modification of the speaker device according to the embodiment of the
present invention. This speaker device 1B has the same configuration as the example shown in
FIG. 2 except that the form of the diaphragm 31 (31-1, 31-2) is a cone shape. The same parts as
those in the example of FIG. By making the diaphragm 31 into a cone shape, the diaphragm 31
can have rigidity in the vibration direction of the diaphragm 31. The diaphragm 31 is provided
with a flat portion 31A connected to the diaphragm connecting portion 44 of the vibration
direction converter 40. The flat portion 31 </ b> A can improve rigidity in the vibration direction
of the diaphragm 31.
12-04-2019
17
[0049]
FIG. 10 shows another modification of the speaker device according to the embodiment of the
present invention. This speaker device 1C has the same configuration as the example shown in
FIG. 2 except that the diaphragm 31 (31A, 31B) is provided only on one side. The same parts as
those in the example of FIG. A bottom surface portion 17 as a stationary portion 10 is provided
on the side facing the diaphragm 31. The bottom surface portion 17 may not be provided as
necessary. When the bottom portion 17 is not provided, a part of the housing may be used as the
bottom portion 17 by attaching the speaker device 1 to an electronic device described later, in
particular, a housing of a flat display panel.
[0050]
In the speaker device 1 according to the embodiment of the present invention, the vibration
direction of the voice coil 21 and the vibration direction of the diaphragm 31 are different. The
vibration of the voice coil 21 is changed in direction by the vibration direction converter 40 and
transmitted to the diaphragm 31. Thus, even if the amplitude of the voice coil 21 is increased, the
amplitude of the voice coil 21 does not directly affect the thickness of the diaphragm 31 in the
vibration direction of the speaker device 1. Therefore, the speaker device 1 according to the
embodiment of the present invention can achieve both the large output and the thinness of the
speaker device which is difficult to realize with the conventional speaker device.
[0051]
In the speaker device 1, the vibration of the voice coil 21 is transmitted to the vibration direction
conversion unit 40 via the rigid connecting unit 50. The vibration direction conversion unit 40
changes the direction of vibration of the voice coil by changing the angle of the rigid link portion
41. Thereby, the vibration of the voice coil 21 can be efficiently transmitted to the diaphragm 31.
In addition, the vibration direction converter 40 includes a first link portion 41-1 and a second
link portion 41-2. One end of the second link portion 41-2 is supported by the stationary unit 10.
The other end of the second link portion 41-2 is connected to the middle portion of the first link
portion 41-1. One end of the first link portion is connected to the voice coil 21 directly or
through another member. The other end of the second link portion is connected to the
diaphragm 31 directly or through another member. In addition, the other end of the second link
12-04-2019
18
portion 41-2 supports the first link portion 41-1 so as to change its angle. Therefore, when
vibration of the voice coil 21 in the X-axis direction is applied to one end of the first link portion
41-1, the other end of the first link portion 41-1 vibrates in the Z-axis direction. As a result, the
vibration in the X-axis direction of the voice coil 21 can be efficiently converted to the Z-axis
direction and transmitted to the diaphragm 31.
[0052]
The speaker device 1 includes an annular voice coil 21. The annular voice coil 21 is disposed
between the first diaphragm 31-1 and the second diaphragm 31-2 in which the vibration
direction conversion unit 40 is interposed. It is done. If the thickness of the voice coil 21 in the Zaxis direction (the vibration direction of the diaphragm 31) can thereby be accommodated within
the width of the vibration direction converter 40 in the Z-axis direction, the thickness of the
speaker device 1 in the Z-axis direction is affected. The voice coil 21 can be deployed without
doing so. The cross-sectional shape of the voice coil 21 (the shape of the cross section extending
in the direction of vibration of the voice coil 21 itself) is formed into a horizontally long
rectangular shape in which the short axis 21b is along the Z axis direction (the vibration
direction of the diaphragm 31). It is done. Therefore, even when the thickness of the speaker
device 1 is reduced, a sufficient driving force can be obtained while the width in the direction of
the long axis 21a is relatively increased.
[0053]
The speaker device 1 includes an outer peripheral support portion 11 as a stationary portion 10,
includes a bridge portion 15 that bridges the opposing portion of the outer peripheral support
portion 11, and the inner support portion 14 is formed by the bridge portion 15. . The inner
support portion 14 serves as the stationary portion 10 inside the apparatus and supports the
vibration direction converter 40. Even in a mode in which the first diaphragm 31-1 and the
second diaphragm 31-2 are disposed opposite to each other, the vibration direction converter is
formed by the stationary unit 10 (inner support unit 14) formed inside the speaker device 1 It
supports 40. Therefore, as described above, the vibration of the voice coil 21 is efficiently
transmitted to the two diaphragms (the first diaphragm 31-1 and the second diaphragm 31-2)
via the vibration direction converter 40. be able to.
[0054]
12-04-2019
19
The speaker device 1 further includes an outer peripheral support portion 11 as the stationary
portion 10. Further, the outer peripheral support portion 11 includes the outer peripheral wall
portion 12 having a wall surface along the vibration direction of the diaphragm 31. For this
reason, the stationary portion can obtain relatively high rigidity against the vibration of the
diaphragm 31. Further, since the outer peripheral wall 12 is provided as a pair at both ends of
the bridge portion 15, the deformation of the bridge portion 15 can be suppressed, and the
vibration direction conversion portion 40 can be supported by the stationary portion 10 having
high rigidity.
[0055]
The outer peripheral support portion 11 includes a first outer peripheral frame portion 13-1
provided in the vicinity of the upper end portion 12a of the outer peripheral wall portion 12 and
a second outer peripheral frame portion 13-2 provided in the vicinity of the lower end portion
12b of the outer peripheral wall portion 12. Equipped with The first outer peripheral frame
portion 13-1 supports the first diaphragm 31-1 via the first edge 33-1. The second outer
peripheral frame 13-2 supports the second diaphragm 31-2 via the second edge 33-2. For this
reason, the first diaphragm 31-1 and the second diaphragm 31-2 have predetermined intervals
(the first diaphragm 31-1 and the second diaphragm 31) by the outer peripheral wall 12 having
rigidity. While being maintained at a distance between −2 and −2, it is vibratably supported by
the stationary unit 10.
[0056]
The stationary portion 10 includes a plurality of outer peripheral wall portions 12. The outer
peripheral wall 12 is disposed to surround the vibration direction converter 40. The outer
circumferential wall 12 supports the magnetic circuit 23. For this reason, in the vibration
direction of the diaphragm 31, the vibration direction converter 40 and the magnetic circuit 23
can be disposed between the first diaphragm 31-1 and the second diaphragm 31-2. That is, the
speaker device 1 in the vibration direction of the diaphragm 31 can be made relatively thin.
[0057]
In addition, the speaker device 1 has the first diaphragm 31-1 and the second diaphragm 31-2
disposed opposite to each other and synchronously vibrates both the diaphragms in the opposite
direction, so that it has a thin structure and no directivity. It is possible to realize sexual sound
12-04-2019
20
output.
[0058]
In the stationary unit 10, the drive unit support unit 16 may be a frame, and the outer peripheral
frame 13 and the outer peripheral wall 12 may be part of a cabinet.
In this case, the cabinet comprises an air-tight interior space. The frame is supported by the
cabinet. In the internal space of the cabinet, the above-described vibration direction converter 40
and a part of the diaphragm 31, a part of the magnetic circuit 23, the voice coil 21, the voice coil
support 22, and the connecting part 50 are disposed. Note that a part of the cabinet may be an
electronic device described later, for example, a housing of a television.
[0059]
The diaphragm 31 may be formed in a flat plate shape having rigidity in the vibration direction
of the diaphragm 31 as needed.
[0060]
Although the vibration direction conversion unit 40 is supported by the bridge portion for the
stationary portion connection portion 45, the present invention is not limited to this, and the
stationary portion connection portions 45 of the pair of vibration direction conversion portions
40 may be connected to each other. I do not care.
[0061]
As described above, the speaker device according to the embodiment of the present invention
can be thinned, and realization of loudness is also possible.
Such a speaker device can be effectively used for various electronic devices and vehicles.
FIG. 11 is an explanatory view showing an application example of the speaker device according
to the embodiment of the present invention. In the electronic device 2 such as the flat panel
12-04-2019
21
display shown in FIG. 6A, the thickness space necessary for the installation of the speaker device
1 can be reduced, so that the thickness of the entire electronic device can be reduced. In addition,
sufficient audio output can be obtained even in a thinned electronic device. Also, the speaker
device may be attached to the back side of the flat panel display. The figure (b) has shown the
motor vehicle 3 provided with the speaker apparatus which concerns on embodiment of this
invention. In the automobile 3 shown in the figure, the in-vehicle space can be expanded by
thinning the speaker device 1. In particular, in the interior in which the speaker device 1
according to the embodiment of the present invention is installed in the door panel, the
protrusion of the door panel can be eliminated and the operation space of the driver can be
expanded. In addition, since sufficient audio output can be obtained, it is possible to enjoy music
and radio broadcasting comfortably in the car even when traveling at high speeds, etc. where
there are many noises.
[0062]
In addition, as a building equipped with the speaker device 1, a house (building) for use as a
residence of a person, a hotel, a hotel, an inn or training that can accommodate a large number of
people such as a meeting, a lecture, a party, etc. When the speaker device 1 is installed in a
facility or the like (building), the thickness space necessary for installing the speaker device 1 can
be reduced, so unnecessary space can be deleted, and the space can be effectively used. Also, in
recent years, with the spread of projectors and large-screen TVs, it has become possible to see an
example of providing a room equipped with audio and video equipment, and on the other hand a
living room without providing a room equipped with audio and video equipment. There are also
cases where the theater room is used as a theater room. Even in such a case, by using the
speaker device 1, it is possible to easily convert a living room or the like into a theater room, and
it is possible to effectively utilize the space in the living room. In addition, the arrangement |
positioning place of the speaker apparatus 1 is a ceiling, a wall, etc. of a living room, for example.
[0063]
Although the embodiments of the present invention have been described in detail with reference
to the drawings, the specific configuration is not limited to these embodiments, and changes in
design etc. within the scope of the present invention are not limited. Are included in the present
invention. The embodiments shown in the above-mentioned drawings can be combined with each
other unless there is any contradiction or problem in the purpose, configuration and the like.
Further, the contents of the respective drawings may be independent embodiments, and the
12-04-2019
22
embodiment of the present invention is not limited to one embodiment combining the respective
drawings.
[0064]
1, 1A, 1B, 1C: speaker device, 10: stationary portion, 11: outer peripheral support portion, 12:
outer peripheral wall portion, 13: outer peripheral frame portion, 14: inner support portion, 15:
bridge portion, 16: drive portion support Part, 17: Bottom part, 20: Drive part, 21: Voice coil, 22:
Voice coil support part, 23: Magnetic circuit, 23G: Magnetic gap, 23A: Yoke, 23B: Magnet, 23C:
Plate, 24: Damper, Reference Signs List 30: vibrator, 31: diaphragm, 31A: flat plate part, 31B:
annular part, 32: top, 32-1: first top, 32-2: second top, 31C: outer peripheral part, 31- 1: 1st
diaphragm, 31-2: 2nd diaphragm, 33: edge, 33-1: 1st edge, 33-2: 2nd edge, 34: 1st vibration
part, 35: Second vibrating portion, 36: recessed portion (annular recessed portion), 37:
reinforcing portion, 40: Vibration direction conversion part, 41 (41A, 41B): link part, 42: joint
part, 43: connection part for voice coil, 44: connection part for diaphragm, 45: connection part
for stationary part 50: connection part, 51: Mounting surface portion, 52: first cylindrical
connecting portion, 53: second cylindrical connecting portion, 54: outer peripheral portion, 2:
electronic device, 3: automobile
12-04-2019
23
Документ
Категория
Без категории
Просмотров
0
Размер файла
38 Кб
Теги
description, jp2012074776
1/--страниц
Пожаловаться на содержимое документа