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JP2011205367

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DESCRIPTION JP2011205367
An object of the present invention is to present a concrete shape that is easy to process on the
vibration unit side joint and the diaphragm side joint and provides excellent sound quality. A
frame, a plate-like diaphragm provided in a non-contacting manner inside the frame, a vibration
unit fixed to a support member provided on the frame to give vibration to the diaphragm A
speaker comprising a vibration transmitting member for transmitting the vibration of the
vibration unit to the diaphragm, wherein the vibration transmitting member comprises a
vibration unit side joint portion and a diaphragm side joint portion, and the vibration unit side
joint portion is The vibration unit has a shape to be fitted, and the opposite side has a disk shape,
and the diaphragm side joint portion has a cup shape, and the open side of the cup shape is
bonded to the diaphragm with an adhesive. The bottom side of the cup shape is joined with the
disc shaped portion of the vibration unit side joint portion with an adhesive. [Selected figure]
Figure 4
Loudspeaker having a cup-shaped vibration transmitting member between a vibration unit and a
diaphragm
[0001]
The present invention relates to a speaker that transmits a vibration generated by a vibration
unit to a flat diaphragm to emit a sound.
[0002]
Patent Document 1 discloses a frame, a plate-like diaphragm provided in a non-contact manner
inside the frame, and a drive mechanism fixed to the attachment portion provided on the frame
to give vibration to the diaphragm ((1) A first joint portion (hereinafter referred to as a
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vibration unit side joint portion ) provided on the drive mechanism side, including the
vibration unit in the present specification, and the diaphragm A clearance is formed between
a second joint provided on the side (herein referred to as "diaphragm-side joint" in this
specification), and the adhesive is filled in the clearance to form a diaphragm. A speaker is
disclosed in which the drive mechanism is connected and fixed.
[0003]
Patent Document 2 discloses a speaker in which a diaphragm provided with a string-like rib is
formed.
[0004]
Patent Document 3 discloses a speaker in which a hole is provided in a diaphragm and a speaker
unit (diaphragm driving mechanism) is provided on the rear side of the hole.
[0005]
Patent Document 4 discloses a speaker in which sound quality control means for suppressing a
high sound component is provided in a hole of a diaphragm.
[0006]
JP, 2001-128289, A JP, 2000-354294, A JP, 2000-308173, A JP, 2000-308168, A
[0007]
The problem to be solved is to present a concrete shape that is more easily processed and
provides excellent sound quality in the vibration unit side joint and the diaphragm side joint in
the speaker disclosed in Patent Document 1.
[0008]
The present invention comprises a frame, a plate-like diaphragm provided non-contactingly
inside the frame, a vibration unit fixed to a supporting member provided on the frame to give
vibration to the diaphragm. A speaker comprising a vibration transmitting member for
transmitting the vibration of the vibration unit to the diaphragm, wherein the vibration
transmitting member comprises a vibration unit side joint portion and a diaphragm side joint
portion, and the vibration unit side joint portion is The vibration unit has a fitting shape to be
fitted, and the opposite side has a disk shape, the diaphragm side joint has a cup shape, and the
open side of the cup shape is the diaphragm It is characterized in that it is joined by an adhesive
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and the bottom of the cup-shaped portion is joined by an adhesive to a disc-shaped portion of the
joint portion on the side of the vibration unit.
[0009]
It is desirable that a plurality of cup-shaped portion cutouts be provided on the open side of the
cup-shaped portion of the diaphragm-side joint.
[0010]
It further has a cup-shaped portion shaft portion connecting the center portion on the open side
of the cup-shaped portion of the diaphragm side joint portion to the center portion on the bottom
side of the cup-shaped portion, The diaphragm side joint portion and the diaphragm can be
joined on both the part open side.
[0011]
Preferably, a metal cup-shaped stem is embedded in the center of the cup-shaped shaft of the
diaphragm-side joint.
[0012]
An adhesive can be applied to the inside of the cup shape of the diaphragm-side joint.
[0013]
According to the speaker of the present invention, there is an advantage that it is easy to process
and a speaker with excellent sound quality can be obtained.
[0014]
FIG. 1 is a drawing-substituting photograph in which a diaphragm joint (a cup-shaped portion)
constituting a vibration transmission member is viewed from the cup-shaped portion open side.
Also visible below is the support member of the vibratory unit.
FIG. 2: is the drawing substitute photograph which looked at the state which assembled the
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weight, the support member, the vibration unit, and the vibration transmission member from the
side in an order from the bottom.
The vibration unit side joint portion constituting the vibration transmission member is fitted in
the vibration unit cylindrical portion.
FIG. 3: is a drawing substitute photograph which drew the state which the vibration unit and the
vibration unit side joint part were fitting closely.
The coil terminal of the vibration unit is drawn.
The vibration unit cylindrical portion is a portion where a coil is wound, and the vibration unit
side joint portion of the vibration transmission member is fitted to the cylindrical portion.
FIG. 4: is the drawing substitute photograph which looked at the state which assembled the
weight, the supporting member, the vibration unit, the vibration transmission member, and the
diaphragm in order from the bottom seen from the side.
It can be seen that the diaphragm is provided with a rib.
FIG. 5 is a view showing the shape of the diaphragm side joint portion (cup-shaped portion)
constituting the vibration transfer member.
FIG. 5A is a view from above, and FIG. 5B is a perspective view from diagonally above.
FIG. 6 is a perspective view showing the shape of the vibration unit side joint portion constituting
the vibration transmission member.
6 (a) is a perspective view as viewed from above, and FIG. 6 (b) is a perspective view as viewed
from below.
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FIG. 7 is a perspective view showing the shape of the diaphragm. FIG. 7A is a perspective view as
viewed from above, and FIG. 7B is a perspective view as viewed from below. FIG. 8 is a
perspective view showing the shape of the vibration unit. FIG. 8A is a perspective view as viewed
from above, and FIG. 8B is a perspective view as viewed from below. FIG. 9 is a perspective view
showing the shape of the support bar. FIG. 9A is a perspective view as viewed from above, and
FIG. 9B is a perspective view as viewed from below. FIG. 10 is a perspective view showing the
shape of a weight. FIG. 10A is a perspective view as viewed from above, and FIG. 10B is a
perspective view as viewed from below.
[0015]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
[0016]
The speaker according to the present invention comprises a frame, a plate-like diaphragm
provided non-contactingly inside the frame, and a vibration unit fixed to a support member
provided on the frame to give vibration to the diaphragm. A speaker comprising a vibration
transmitting member for transmitting the vibration of the vibration unit to the diaphragm is
assumed.
Specifically, the speaker disclosed in Patent Document 1 is. The improved part is a vibration
transmission member.
[0017]
FIG. 5 is a view showing the shape of the diaphragm side joint portion 50 (cup shape portion 51)
which constitutes the vibration transfer member 30. As shown in FIG. FIG. 5A is a view from
above, and FIG. 5B is a perspective view from diagonally above. The diaphragm side joint unit 50
constitutes the vibration transfer member 30 together with the vibration unit side joint unit 40.
The vibration transmission member 30 is an important member for transmitting the vibration
generated in the vibration unit 10 to the diaphragm 20, and affects the sound quality of the
speaker.
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[0018]
The diaphragm-side joint 50 comprises a bowl-shaped partial cup-shaped portion 51. The cupshaped part open side 52, which is the open side of the cup-shaped part 51, is adjusted in shape
so as to be closely joined to the back side of the diaphragm 20. The back side of the diaphragm
20 is the side which is not visible to the user when the speaker is used, and can be said to be the
inside of the speaker. The diaphragm 20, which will be described later with reference to FIG. 7, is
curved so that the cup-shaped open side 52 is processed accordingly. Both the diaphragm side
joint portion 50 and the vibration unit side joint portion 40 are made of a balsa material.
Therefore, it is possible to process using a file or the like.
[0019]
The cup-shaped portion bottom side 53 is configured to be flat and has a circular flat surface. It
is a part joined with the disk shaped part 42 of the vibration unit side joint part 40 mentioned
later with an adhesive agent. Joining of the cup-shaped bottom side 53 and the disc-shaped
portion 42 is performed at the final stage of the speaker assembly. That is, after the diaphragm
20 and the diaphragm side joint portion 50 are bonded by the adhesive and the vibration unit
cylindrical portion 11 and the vibration unit side joint portion 40 are fitted (joined), the cup
shape is made in the final stage Bonding between the bottom side 53 and the disk-shaped portion
42 is performed. Both are planar because there is room to absorb some dimensional corrections.
[0020]
A plurality of cup-shaped portion notches 54 are provided to prevent the space enclosed by the
cup-shaped portion 51 and the diaphragm 20 from being sealed. In FIG. 5, three are shown. In
the figure, all of the plurality of cup-shaped notches 54 are given the same reference numerals.
The cup-shaped shaft portion 55 is a member provided on a column near the central axis of the
cup-shaped portion 51, and is integrally formed of the same member as the cup-shaped portion
51 and a balsa material. The cup-shaped shaft 55 extends from the center of the bottom of the
cup-shaped portion 51 toward the center of the cup-shaped open side 52, and the cup-shaped
open side 52 is joined to the diaphragm 20. Similarly, the cup-shaped shaft 55 is also joined to
the diaphragm 20.
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[0021]
At the center of the cup-shaped portion shaft portion 55 of the diaphragm-side joint portion 50
(cup-shaped portion 51), a mandrel (cup-shaped portion mandrel 56) made of metal is
embedded. As the metal material, brass or aluminum is suitable. It is desirable to fill the inside of
the diaphragm side joint portion 50 (cup-shaped portion 51) with an adhesive. It can be seen
from the drawing substitute photograph of FIG. 1 that the inside of the cup-shaped portion 51 is
filled with the adhesive, resulting in an uneven texture. This adhesive is useless for bonding itself.
Since an adhesive is used in the joint portion, it is considered that the use of the same adhesive
also in the portion of the balsa material which is not jointed has the effect of making the
transmission of vibration uniform.
[0022]
FIG. 6 is a perspective view showing the shape of the vibration unit side joint portion 40
constituting the vibration transfer member 30. As shown in FIG. 6 (a) is a perspective view as
viewed from above, and FIG. 6 (b) is a perspective view as viewed from below. The vibration unit
side joint portion 40 includes a fitting shape portion 41 which is a cylindrical member fitted to
the vibration unit cylindrical portion 11 and a disc shaped portion 42 which is a member joined
to the cup shaped portion bottom side 53. . The fitting shape portion 41 has a shape to be fitted
to the vibration unit cylindrical portion 11 of the vibration unit 10 shown in FIG. 8, and the
fitting shape portion 41 and the vibration unit cylindrical portion 11 are joined by an adhesive.
Be done.
[0023]
FIG. 7 is a perspective view showing the shape of the diaphragm 20. As shown in FIG. FIG. 7A is a
perspective view as viewed from above, and FIG. 7B is a perspective view as viewed from below.
The diaphragm 20 is curved as shown in FIG. 7 and a rib 21 is provided. The diaphragm 20 and
the ribs 21 are made of balsa material.
[0024]
FIG. 8 is a perspective view showing the shape of the vibration unit 10. FIG. 8A is a perspective
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view as viewed from above, and FIG. 8B is a perspective view as viewed from below. The
vibration unit mainly includes an iron core, a permanent magnet surrounding the core, a coil, a
terminal for transmitting an electric signal to the coil, and a vibration unit cylindrical portion 11
for transmitting generated vibration to a diaphragm. A screw hole is cut in the lower center of
the core and the support rod 19 is screwed. The support rod 19 passes through a hole passing
through a support member 15 described later, and is connected to the weight 17 to fix the
vibration unit 10 to the support member 15 and the frame (the housing of the speaker). Each of
the vibration unit side joint portion 40, the diaphragm side joint portion 50, and the diaphragm
20 joined to the vibration unit cylindrical portion 11 is such that its weight is supported by the
vibration unit cylindrical portion 11. Therefore, it is made of balsa wood which is a light and
strong member. The weight 17 is balanced in consideration of that.
[0025]
FIG. 9 is a perspective view showing the shape of the support member 15. FIG. 9A is a
perspective view as viewed from above, and FIG. 9B is a perspective view as viewed from below.
Here, the support member 15 is formed of wood in a rectangular parallelepiped shape in
consideration of ease of processing, but may be formed of metal. Further, the shape is not limited
to a rectangular solid, and other shapes such as a cylindrical shape, a cylindrical shape, and the
like are also possible. The support member 15 is a member fixed to the housing itself of the
speaker. As shown in FIG. 9, a hole penetrating from the top to the bottom of the central portion
is provided, and the support rod 19 is passed. The support member 15 fixes the vibration unit 10
by being vertically sandwiched by the vibration unit 10 and the weight 17.
[0026]
FIG. 10 is a perspective view showing the shape of a weight. FIG. 10A is a perspective view as
viewed from above, and FIG. 10B is a perspective view as viewed from below. Here, a cylindrical
weight made of brass is used, and a threaded hole is formed in the central shaft portion so that
the aforementioned support rod 19 can be screwed in.
[0027]
FIG. 2: is the drawing substitute photograph which looked at the state which assembled the
weight 17, the supporting member 15, the vibration unit 10, and the vibration transmission
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member 30 sequentially from the bottom from the side. The vibration unit side joint portion 40
constituting the vibration transfer member 30 is fitted in the vibration unit cylindrical portion
11.
[0028]
FIG. 3: is a drawing substitute photograph which drew the state which the vibration unit 10 and
the vibration unit side junction part 40 have fitted closely. The coil terminals of the vibration unit
10 are drawn. The vibration unit cylindrical portion 11 is a portion where a coil is wound, and
the vibration unit side joint portion 40 of the vibration transmission member 30 is fitted to the
cylindrical portion.
[0029]
FIG. 4: is the drawing substitute photograph which looked at the state which assembled the
weight 17, the supporting member 15, the vibration unit 10, the vibration transmission member
30, and the diaphragm 20 in an order from the bottom seen from the side. It can be seen that the
diaphragm 20 is provided with a rib 21. In FIG. 4, the frame (the casing of the speaker) is omitted
to draw. Also, although the diaphragm 20 is placed horizontally, this is for the convenience of
assembly. In actual use, the diaphragm 20 is placed perpendicular to the floor.
[0030]
The present invention is not limited to the prior art cited in Patent Document 1, but there is a
possibility that it can be used if it is a speaker in the form of transmitting the vibration of the
vibration unit to the diaphragm. As a vibration transmission member, it does not become a single
speaker component, and it is necessary to process according to the shape of each speaker and
diaphragm.
[0031]
DESCRIPTION OF SYMBOLS 10 vibration unit 11 vibration unit cylindrical part 15 support
member 17 weight 19 support rod 20 diaphragm 21 rib 30 vibration transmission member 40
vibration unit side joint part 41 fitting shape part 42 disc shape part 50 diaphragm side joint
part 51 cup shape Part 52 Open side of the cup-shaped part 53 Cup-shaped part bottom side 54
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Cup-shaped part notched part 55 Cup-shaped part shaft part 56 Cup-shaped part stem
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