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JP2012134718

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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 JP2012134718
The present invention provides a speaker capable of improving the workability of connection
between a speaker unit and a box, and achieving space saving, and a portable information
terminal provided with the same. A speaker (1) has a speaker unit (10) and a box (2). The
speaker unit 10 has a speaker unit side terminal 21. The box 2 includes a housing 3 in which an
internal space 4 for housing the speaker unit 10 is formed, and a box side terminal 22 disposed
in close contact with the housing 3 inside the housing 3 and projecting into the internal space 4
Have. When the speaker unit 10 is accommodated in the internal space 4, one of the first
terminals 21 of the speaker unit side terminal 21 and the box side terminal 22 has a protrusion
21 a in the internal space 4, and the other second terminal 21 The terminal 22 surrounds the
outer peripheral surface of the projecting portion 21a so as to sandwich at least both sides, and
the first terminal 21 and the second terminal 22 are electrically connected by solder. [Selected
figure] Figure 1
Speaker and portable information terminal
[0001]
The present invention relates to a speaker and a portable information terminal, and more
particularly to a speaker having a speaker unit and a box and a portable information terminal
provided with the same.
[0002]
A speaker is mounted in a portable information terminal such as a mobile phone, a smartphone, a
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PDA (Personal Digital Assistants), a game machine, and a personal computer.
In recent years, high sound quality is also required for a speaker mounted on a portable
information terminal.
[0003]
When the sound emitted from the back of the diaphragm of the speaker wraps around to the
surface, the sound emitted from the front and the sound emitted from the back interfere with
each other to cancel each other, resulting in poor sound quality. In the low frequency range, the
interference is large, and the sound quality of the low frequency range is particularly bad. In
order to suppress the interference of the sound emitted from the back surface to the sound
emitted from the surface of the diaphragm, a method is used in which the back surface of the
diaphragm is sealed to block the sound emitted from the back surface of the diaphragm.
[0004]
On the other hand, if the volume of the space disposed on the back surface of the diaphragm is
small, the vibration of the diaphragm is impeded by the air resistance in the space. As described
above, when the back surface of the diaphragm is simply sealed, the volume of the space
disposed on the back surface of the diaphragm can not be secured, so that the vibration of the
diaphragm is hindered by the air resistance in the space. Therefore the sound quality is worse.
[0005]
Therefore, in order to increase the volume of the space disposed on the back surface of the
diaphragm while suppressing the interference of sound, the speaker unit is disposed in a box
having a space disposed on the back surface of the diaphragm, and the diaphragm by the box
The method of blocking the sound emitted from the back of the is used.
[0006]
At this time, a speaker unit having a diaphragm, a voice coil, a magnet and a frame is mounted in
the box.
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In this state, a lead connected to the voice coil is drawn out of the frame and connected to the
wire. The wire is routed inside the box and pulled out from the inside to the outside of the box
through through holes provided in the box.
[0007]
Various configurations have been proposed for the terminal of the speaker unit. For example,
Japanese Patent Laid-Open No. 2002-291094 (Patent Document 1) discloses a speaker mounting
structure provided with a terminal pin to which an end of a lead wire extending from a voice coil
is fixed. In this speaker mounting structure, the conductive portion (conductive pattern) of the
substrate is soldered in a state where the terminal pin is inserted into the pin insertion hole of
the substrate, and the terminal pin and the conductive portion are electrically connected.
[0008]
Further, for example, Japanese Patent Laid-Open No. 2009-278213 (Patent Document 2)
discloses an electroacoustic transducer in which a lead wire drawn from a voice coil is connected
to an external connection terminal by soldering. In this electro-acoustic transducer, the external
connection terminal is insert-molded on a resin insulator fixed to the bottom plate of the frame,
and the fixing portion embedded in the resin and the portion extending obliquely downward
from the fixing portion And a cantilevered spring piece.
[0009]
JP 2002-291094 JP 2009-278213 A
[0010]
In a speaker in which the above speaker unit is attached to a box, a wire connected to the
speaker unit may be drawn from the inside to the outside of the box through a hole provided in
the box.
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In this case, since it is necessary to seal the hole with an adhesive or the like while the wire is
pulled out, there is a problem that the workability is poor. When the holes are sealed with an
adhesive or the like, if the amount of the adhesive is small, the sealing tends to be insufficient,
and there is a problem that the sound quality becomes unstable due to the interference of sound.
On the other hand, when the amount of adhesive is large, the volume of the adhesive occupied in
the box increases, which causes a problem that the sound quality becomes unstable.
[0011]
In addition, in the case of a speaker in which the above speaker unit is attached to a box, it is
necessary to route and process a wire in the box. Since the process of routing the wire takes a lot
of work man-hours, the work man-hours increase. Therefore, there is a problem that workability
is bad. In addition, an abnormal sound is generated due to the contact of the wound wire with the
speaker unit and the box. For this reason, there is a problem that sound quality becomes
unstable. In addition, the volume of the wire wound around reduces the sealed volume in the box,
thereby degrading the sound pressure. This causes a problem that the sound quality becomes
unstable.
[0012]
In addition, in the case of the speaker in which the above speaker unit is attached to the box, the
terminal provided on the box and the wire may be connected in the box instead of drawing the
wire from the inside to the outside of the box. In this case, it is necessary to connect both ends of
the wire. Since the connection of the wire takes work man-hours, the work man-hours increase
by connecting at both ends of the wire. For this reason, there is a problem that workability is bad.
[0013]
Since there are problems as described above when connecting the speaker unit and the box using
a wire, it is also conceivable to directly connect the speaker unit and the box without using a
wire. In this case, although it is necessary to align the positions of the terminals on the speaker
side and the terminals on the box side, there is a problem that it is difficult to align the positions
because the dimensional accuracy of each part is limited. Even in the case of directly connecting
the speaker unit and the box, there is a problem that the workability is poor because the
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alignment is difficult. Therefore, it is difficult to directly connect the speaker unit and the box
without using a wire.
[0014]
Therefore, it may be considered that the connection between the speaker unit and the box is not
made by a wire but by a terminal pin as described in the above-mentioned JP-A-2002-291094.
However, since the speaker mounting structure described in this publication is not the structure
in which the speaker unit is disposed in the box, the pin terminal becomes an obstacle during the
mounting work of the speaker. Therefore, there is also a problem that the workability is poor in
this case as well. In addition, since the pin terminal is out of the speaker, the range occupied by
the speaker is increased. Therefore, there is a problem that space saving can not be achieved.
[0015]
Furthermore, the case where it connects not with a wire but with the external connection
terminal which has a spring piece as described in said Unexamined-Japanese-Patent No. 2009278213 is also considered not for the connection of a speaker unit and a box. However, in the
external connection terminal having the spring piece described in this publication, there is a
problem of conduction failure due to the contact of the spring piece coming off due to vibration,
conduction failure due to plastic deformation of the spring piece, conduction failure due to dirt
on the contact of the spring piece, etc. There is. There is also a problem that the mounting
position is shifted by the reaction force of the spring piece.
[0016]
Therefore, when attaching a speaker unit to a box, the mechanism for holding the position of a
spring piece and an operation ¦ work are required so that the conduction defect of these may be
prevented and the shift of an attachment position may be prevented. Also, in order to secure the
area for providing the spring pieces, it is necessary to restrict the arrangement of the back holes
of the frame and to enlarge the outer diameter of the frame. Therefore, there is a problem that
space saving can not be achieved. Moreover, there is a problem that the workability is bad
because of the above-mentioned work.
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[0017]
The present invention has been made in view of the above problems, and an object thereof is to
improve the workability of connection between a speaker unit and a box, to save space, and to
suppress a conduction defect. It is providing a portable information terminal provided with it.
[0018]
The speaker of the present invention has a speaker unit and a box.
The speaker unit is electrically connected to the diaphragm, a voice coil attached to the
diaphragm, a magnet arranged to face the voice coil, a frame supporting the magnet and the
diaphragm, and the voice coil, And a speaker unit side terminal protruding from the frame. The
box has a housing in which an internal space for housing the speaker unit is formed, and a boxside terminal which is disposed in close contact with the housing inside the housing and which
protrudes into the internal space. In the state where the speaker unit is accommodated in the
internal space, in the internal space, one of the first terminal of the speaker unit side terminal
and the box side terminal has a protrusion, and the other second terminal is a protrusion of The
outer peripheral surface is surrounded so as to sandwich at least both sides, and the first
terminal and the second terminal are electrically connected by solder.
[0019]
According to the speaker of the present invention, one of the first terminals of the speaker unit
side terminal and the box side terminal has the projecting portion, and the other second terminal
sandwiches the outer peripheral surface of the projecting portion from at least both sides.
Surrounded by Therefore, even if the first terminal and the second terminal shift in the direction
in which the protrusion of the first terminal extends, it is possible to suppress the shift of the
mutual distance. For this reason, the shift ¦ offset ¦ difference of the 1st terminal in the direction
to which a protrusion part extends, and a 2nd terminal can be accept ¦ permitted. Therefore,
good soldering can be performed even if high mounting accuracy and dimensional accuracy are
not required for the first terminal and the second terminal in the direction in which the
protrusion extends.
[0020]
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Further, the other second terminal surrounds the outer peripheral surface of the projecting
portion so as to sandwich at least both sides, so the first terminal and the second terminal extend
in the direction intersecting the extending direction of the projecting portion of the first terminal.
Even if there is a gap between them, the gap between them can be suppressed. For this reason,
the shift ¦ offset ¦ difference of the 1st terminal in the direction which cross ¦ intersects the
direction which a protrusion part extends, and a 2nd terminal can be accept ¦ permitted.
Therefore, good soldering can be performed even if high mounting accuracy and dimensional
accuracy are not required for the first terminal and the second terminal in the direction
intersecting the extending direction of the protrusion. This can improve the workability. Also, the
soldering quality can be improved. Therefore, the conduction failure can be suppressed.
[0021]
In addition, since the box is disposed in close contact with the housing inside the housing and has
a box-side terminal projecting into the internal space, the wire connected to the speaker unit is
boxed in the conventional manner. There is no need to pull out from the inside of the box
through the holes provided in the Since there is no need to seal the hole with an adhesive or the
like in the state where the wire is pulled out, the workability can be improved.
[0022]
Also, since it is not necessary to pull the wire connected to the speaker unit from the inside of the
box to the outside through the hole provided in the box as in the conventional case, the amount
of adhesive decreases when sealing the hole with an adhesive or the like. Insufficient sealing can
prevent the sound quality from becoming unstable due to sound interference. On the other hand,
it is also possible to prevent the sound quality from becoming unstable due to an increase in the
amount of adhesive and the volume of the adhesive occupied in the box. This can improve the
sound quality.
[0023]
Further, in a state in which the speaker unit is accommodated in the internal space, one of the
first terminal of the speaker unit side terminal and the box side terminal has a projection in the
internal space, and the other second terminal is a projection. The outer peripheral surface of the
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part is surrounded at least from both sides. Therefore, it is not necessary to process the wire in
the internal space as in the prior art. The processing efficiency can be improved because it is not
necessary to process the wire which requires many man-hours.
[0024]
In addition, since the abnormal sound is not generated by the contact of the wound wire with the
speaker and the box, the sound quality can be improved.
[0025]
In addition, since the volume of the inner space does not decrease due to the volume of the
wound wire, it is possible to suppress the deterioration of the sound pressure.
This can improve the sound quality.
[0026]
In addition, since the number of operation steps is smaller compared to the conventional case
where both ends of the wire are connected, the workability can be improved.
[0027]
Further, in the internal space, one of the first terminals of the speaker unit side terminal and the
box side terminal has a projecting portion, and the other second terminal surrounds the outer
peripheral surface of the projecting portion so as to sandwich at least both sides. It is.
Therefore, the speaker unit side terminal and the box side terminal are disposed in the internal
space. This can save space.
[0028]
In addition, it is possible to prevent a conduction failure due to the contact of the spring piece
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coming off due to vibration as in the prior art, a conduction failure due to plastic deformation of
the spring piece, and a conduction failure due to dirt on the contact of the spring piece.
Moreover, the shift of the attachment position by the reaction force of a spring piece can be
prevented. Therefore, when attaching the speaker unit to the box, there is no need for a
mechanism for holding the position of the spring piece and an operation so as to prevent these
conduction defects and to prevent the attachment position from shifting. Further, there is no
need to restrict the arrangement of the back holes of the frame and to enlarge the outer diameter
of the frame in order to secure the area for providing the spring pieces. Therefore, space saving
can be achieved. Moreover, since the above-mentioned work is not required, the workability can
be improved.
[0029]
In the above speaker, preferably, the second terminal surrounds the entire circumference of the
outer peripheral surface of the protrusion of the first terminal. Thereby, the deviation between
the first terminal and the second terminal can be further allowed. Therefore, the workability can
be further improved.
[0030]
Preferably, in the above speaker, the speaker unit side terminal is a first terminal, and the box
side terminal is the second terminal. Thereby, since the speaker unit side terminal has the
projecting portion, the extending direction of the projecting portion coincides with the thickness
direction of the speaker. Even if high mounting accuracy and dimensional accuracy are not
required for the first terminal and the second terminal in the thickness direction of the speaker,
good soldering can be performed. Therefore, good soldering can be applied to the speaker units
having different heights in the same box. This can improve the workability.
[0031]
Also, the soldering quality can be improved. Therefore, the workability can be improved. Also, the
same box can be used for speaker units of different heights. For this reason, cost reduction is
possible.
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[0032]
In addition, since the extending direction of the protrusion coincides with the thickness direction
of the speaker, the occupancy of the projected area of the speaker unit side terminal viewed from
the extending direction of the protrusion can be reduced. Therefore, restrictions on the position
of the back hole of the frame can be suppressed. Therefore, the workability can be improved.
[0033]
In the above speaker, preferably, the protrusion of the first terminal is located closer to the
second terminal than the first portion and the first portion located on the side electrically
connected to the voice coil, And a second portion surrounded by at least both sides by the second
terminal. The diameter of the second portion is configured to be smaller than the diameter of the
first portion. Since the diameter of the second portion is smaller than the diameter of the first
portion, the speaker unit can be soldered when connecting the voice coil and the first portion of
the first terminal. Even when the solder flows into the upper end side of the side terminal, it is
possible to suppress that the insertion of the box side terminal is prevented by the solder.
[0034]
In the above speaker, preferably, the protrusion of the first terminal is located closer to the
second terminal than the first portion and the first portion located on the side electrically
connected to the voice coil, And a second portion surrounded at least on both sides by the second
terminal, and a third portion disposed between the first portion and the second portion. The
diameter of the third portion is configured to be larger than the diameter of the first portion and
the diameter of the second portion. The diameter of the third portion is configured to be larger
than the diameter of the first portion and the diameter of the second portion, so when connecting
the voice coil to the first portion of the first terminal During the soldering, the third portion can
prevent the solder from creeping up.
[0035]
In the above speaker, preferably, the box is engageable with the first box portion in which the
speaker unit is mounted and the first box portion is housed in the inner space, and the inner
space And a second box portion that can be closed.
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[0036]
The box includes a first box portion and a second box portion engageable with the first box
portion and capable of closing the inner space with the speaker unit housed in the inner space.
Therefore, the internal space can be closed in a state where the speaker unit is disposed in the
internal space.
Therefore, the attachment of the speaker unit to the internal space and the closing of the internal
space are easy. This can improve the workability.
[0037]
The portable information terminal of the present invention includes any of the above portable
information terminals. According to the portable information terminal of the present invention,
since the portable information terminal according to any one of the above-described
embodiments is provided, the portable information terminal can be saved by saving the space of
the speaker. Also, the freedom of design can be improved.
[0038]
As described above, according to the speaker and the portable information terminal of the
present invention, the workability of connection between the speaker unit and the box can be
improved, space saving can be achieved, and poor conduction can be suppressed.
[0039]
It is a schematic perspective view which shows the state from which the 2nd box part was
removed from the 1st box of the speaker in Embodiment 1 of this invention.
It is a schematic perspective view which shows the state in which the 2nd box was attached to
the 1st box of the speaker in Embodiment 1 of this invention. It is the schematic perspective view
seen from the speaker unit side of the speaker in Embodiment 1 of this invention. It is a
schematic perspective view which shows the state in which the speaker unit was attached to the
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1st box of the speaker in Embodiment 1 of this invention. It is a schematic perspective view
which expands and shows the P section of FIG. It is a schematic sectional drawing of the speaker
unit of the speaker in Embodiment 1 of this invention, Comprising: It is sectional drawing
corresponding to the VI-VI line of FIG. It is a schematic plan view which shows arrangement ¦
positioning of the box side terminal of the speaker in Embodiment 1 of this invention, and the
speaker unit side terminal. It is a schematic plan view which shows arrangement ¦ positioning of
the box side terminal of the modification 1 of the speaker in Embodiment 1 of this invention, and
the speaker unit side terminal. It is a schematic plan view which shows arrangement ¦ positioning
of the box side terminal of the modification 2 of the speaker in Embodiment 1 of this invention,
and the speaker unit side terminal. It is a schematic plan view which shows arrangement ¦
positioning with the speaker unit side terminal and the box side terminal by which the lead wire
of the speaker in Embodiment 1 of this invention was soldered. It is a schematic plan view which
shows arrangement ¦ positioning with the speaker unit side terminal and the box side terminal to
which the lead wire of the modification 3 of the speaker in Embodiment 1 of this invention was
soldered. It is a schematic perspective view of the portable information terminal in Embodiment
2 of this invention. It is a schematic perspective view which shows the folded state of the
portable information terminal in Embodiment 2 of this invention.
[0040]
Hereinafter, embodiments of the present invention will be described based on the drawings. First,
the configuration of the speaker according to the first embodiment of the present invention will
be described.
[0041]
Referring to FIG. 1, the speaker 1 mainly includes a box 2 and a speaker unit 10. The speaker
unit 10 is accommodated in the internal space 4 of the box 2. The speaker unit side terminal 21
of the speaker unit 10 and one end of the box side terminal 22 of the box 2 are electrically
connected by soldering. In addition, in FIG. 1, the solder which joins the speaker unit side
terminal 21 and one end of the box side terminal 22 is not shown in order to make it easy to
view. Similarly, in FIGS. 4 and 5, the solder for joining the speaker unit side terminal 21 and one
end of the box side terminal 22 is not shown.
[0042]
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The box 2 is configured to be separable into a first box portion 2a and a second box portion 2b.
The speaker unit 10 is attached to the first box portion 2a. With the speaker unit 10 housed in
the internal space 4, the second box portion 2 b is engageable with the first box portion 2 a and
is provided so as to be able to close the internal space 4.
[0043]
Referring to FIGS. 1 and 2, an engagement portion 7 is provided at the outer edge of the first box
portion 2a. An engagement groove (not shown) is similarly provided at the outer edge of the
second box portion 2b. The first box portion 2a and the second box portion 2b are provided so as
to be engageable at the outer edge portion when the engagement portions 7 are engaged with
each other. The first box portion 2a and the second box portion 2b are provided in a sealable
manner.
[0044]
Referring to FIG. 3, speaker unit 10 is arranged such that at least a portion is exposed from first
box portion 2 a. A speaker connection portion 5 for connecting the speaker 1 to an external
device is provided on a part of the outer peripheral surface of the box 2. The other end of the box
side terminal 22 is provided to be exposed to the outside of the box 2. The other end of the box
side terminal 22 is provided in the speaker connection portion 5.
[0045]
Referring to FIG. 4, the box 2 includes a housing 3 and a box-side terminal 22 disposed inside the
housing 3. An internal space 4 is formed inside the housing 3. The speaker unit 10 is attached to
the box 2 by accommodating the speaker unit 10 in the internal space 4. In addition to the area
in which the speaker unit 10 is accommodated, a space area 6 for securing the volume of the box
2 is provided in the internal space 4.
[0046]
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The box side terminal 22 is formed such that a part of the box side terminal 22 is taken into the
inside of the housing 3 by insert molding, for example. The box side terminal 22 is disposed in
close contact with the housing 3 inside the housing 3. One end of the box side terminal 22 is
provided to project into the internal space 4. Two box side terminals 22 are provided.
[0047]
Referring to FIG. 5, the speaker unit side terminal 21 has a protrusion 21a. The speaker unit side
terminal 21 is formed, for example, in a columnar shape. The speaker unit side terminal 21 may
be, for example, cylindrical or prismatic. The speaker unit side terminal 21 may be formed such
that the diameter of the upper end portion is smaller than that of the lower end portion. Two
speaker unit side terminals 21 are provided.
[0048]
One end of the box side terminal 22 is formed, for example, in a concave shape. The protrusion
21a is disposed inside the concave portion. With the speaker unit 10 housed in the internal space
4, the box-side terminal 22 surrounds the outer peripheral surface of the protrusion 21 a in the
internal space 4 so as to sandwich the outer peripheral surface from both sides. In this state, the
speaker unit side terminal 21 and the box side terminal 22 are soldered together.
[0049]
With regard to the speaker unit side terminal 21 and the box side terminal 22, in a state where
the speaker unit 10 is accommodated in the internal space 4, one first terminal of the speaker
unit side terminal 21 and the box side terminal 22 in the internal space 4 21 has a projecting
portion 21a, and the other second terminal 22 surrounds the outer peripheral surface of the
projecting portion 21a so as to sandwich at least both sides, and the first terminal 21 and the
second terminal 22 are electrically connected by solder. Should just be connected.
[0050]
Referring to FIG. 7, the other second terminal 22 will be described in more detail as surrounding
the outer peripheral surface of the protrusion 21 a so as to sandwich it from at least both sides.
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FIG. 7 shows the arrangement of the speaker unit side terminal 21 and the box side terminal 22
as viewed from the direction in which the protrusion 21a extends. In an imaginary line VL
extending in the radial direction of the speaker unit side terminal 21 through the center CP of
the speaker unit side terminal 21 viewed from the direction in which the protrusion 21 a
extends, both ends of the imaginary line VL are one end of the box side terminal 22 It is arranged
inside the concave part of. The imaginary line VL has an angle of 180 ° with respect to the
center CP.
[0051]
That is, the concave portion at one end of the box-side terminal 22 is disposed to be able to be
disposed at a position of 180 ° with respect to the center CP of the speaker unit-side terminal
21 when viewed from the extending direction of the protrusion 21 a. The protruding portion in
the direction intersecting the extending direction of the projecting portion 21 a is formed by the
concave portion surrounding the position of 180 ° with respect to the center CP of the speaker
unit side terminal 21 when viewed from the extending direction of the projecting portion 21 a A
deviation of 21a can be tolerated. That is, it is possible to solder well even if the position of the
protrusion 21a is shifted in the range located inside the concave portion in the direction
intersecting the extending direction of the protrusion 21a.
[0052]
Therefore, good soldering can be performed even if high mounting accuracy and dimensional
accuracy are not required for the speaker unit side terminal 21 and the box side terminal 22 in
the direction intersecting the extending direction of the protruding portion 21a. For example,
even when the speaker unit side terminal 21 extends at an oblique angle, it can be soldered well
with the box side terminal 22.
[0053]
Further, since the concave portion at one end of the box side terminal 22 is provided so as to
sandwich the outer peripheral surface of the protrusion 21a from at least both sides from the
direction intersecting the extending direction of the protrusion 21a, the protrusion 21a extends
Deviation of the protrusion 21a in the direction can also be tolerated. Therefore, even if the
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speaker unit side terminal 21 and the box side terminal 22 are not required to have high
mounting accuracy and dimensional accuracy in the direction in which the protruding portion
21a extends, good soldering can be performed. For example, even when the height of the speaker
unit side terminal 21 is shifted, the box side terminal 22 can be soldered well.
[0054]
As described above, the speaker unit side terminal 21 is the first terminal 21, and the box side
terminal 22 is the second terminal 22. However, the box side terminal 22 may be a first terminal,
and the speaker unit side terminal 21 may be a second terminal. In this case, the box side
terminal 22 may be formed in a columnar shape, for example, and the speaker unit side terminal
21 may be formed in a concave shape, for example. The box-side terminal 22 has a projecting
portion, and the speaker unit-side terminal 21 is surrounded so as to sandwich the outer
peripheral surface of the projecting portion.
[0055]
Subsequently, the structure of the speaker unit 10 will be described in detail. With reference to
FIG. 6, the speaker unit 10 includes the frame 11, the diaphragm 12, the diaphragm reinforcing
ring 13, the voice coil 14, the magnet 15, the plate 16, the yoke 17, and the speaker unit side
terminal 21. And mainly.
[0056]
The frame 11 mainly has a support portion 11a, an inner circumferential portion 11b, and an
outer circumferential portion 11c. The frame 11 is provided with a back hole. The outer
peripheral end portion of the diaphragm 12 is supported by the support portion 11 a, whereby
the diaphragm 12 is vibratably supported by the frame 11. A step may be provided between the
support portion 11a and the inner circumferential portion 11b.
[0057]
Further, the frame 11 is configured to support the yoke 17 in which the magnet 15 is disposed at
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the inner circumferential portion 11 b. The outer peripheral portion 11c is continuously formed
on the outer peripheral side of the support portion 11a. The frame 11 is formed in a track shape,
for example, in a plan view. Here, the track shape is a shape formed by connecting both ends of
two straight lines by an arc. Frame 11 is formed of, for example, a resin. The frame 11 may be
made of metal.
[0058]
The diaphragm 12 is formed of a thin plate so as to be able to vibrate in the vertical direction
(the direction of arrow A in FIG. 1). The diaphragm 12 has a central vibration portion 12a, a
voice coil attachment portion 12b, an edge portion 12c, and a frame attachment portion 12d.
The central vibrating portion 12 a is provided at the center of the diaphragm 12. The central
vibrating portion 12 a is formed in an arc shape that is convex on the opposite side to the
magnet 15 in a cross sectional view of the diaphragm 12 in the radial direction D.
[0059]
The voice coil attachment portion 12b is provided on the outer peripheral side of the central
vibrating portion 12a. The voice coil mounting portion 12b is provided between the central
vibrating portion 12a and the edge portion 12c. The voice coil mounting portion 12b is annularly
provided so as to surround the central vibrating portion 12a. The voice coil attachment portion
12 b is for attaching the voice coil 14. The voice coil attachment portion 12 b is formed to be flat
in a cross sectional view in the radial direction D of the diaphragm 12. The voice coil mounting
portion 12b is provided with a step at a portion continuous with the central vibrating portion
12a.
[0060]
The edge portion 12c is provided on the outer peripheral side of the voice coil attachment
portion 12b. The frame attachment portion 12d is provided on the outer peripheral side of the
edge portion 12c. The frame attachment portion 12 d is attached to the support portion 11 a of
the frame 11. The frame attachment portion 12d is annularly provided to surround the edge
portion 12c. The frame attachment portion 12 d is formed to be flat in a cross sectional view in
the radial direction D of the diaphragm 12.
01-05-2019
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[0061]
The diaphragm 12 is formed in a track shape, for example, in a plan view. The diaphragm 12 is
made of, for example, PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PEI
(polyetherimide) or the like.
[0062]
The voice coil 14 is attached to the diaphragm 12 by fixing the upper surface of the voice coil 14
to the voice coil attachment portion 12 b of the diaphragm 12. Voice coil 14 is formed, for
example, in a track shape. Lead wires 18 are electrically connected to the voice coil 14.
[0063]
The magnet 15 is disposed on the inner peripheral side of the voice coil 14 (inside magnet type)
at an interval from the inner peripheral surface of the voice coil 14. The magnet 15 is disposed to
face the voice coil 14. The yoke 17 is spaced apart from the outer peripheral surface of the voice
coil 14 by a portion (outer peripheral side portion) disposed on the outer peripheral side of the
voice coil 14 and a portion disposed below the voice coil 14 and the magnet 15 (lower portion
And.
[0064]
The yoke 17 is fixed by fitting with the inner peripheral portion 11 b of the frame 11 on the
outer peripheral surface of the outer peripheral side portion. The lower portion of the yoke 17 is
spaced apart from the lower surface of the voice coil 14. A magnet 15 is disposed at the center of
the lower portion of the yoke 17. A plate 16 is disposed on the top surface of the magnet 15. A
magnetic circuit is constituted by the magnet 15, the plate 16 and the yoke 17.
[0065]
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The speaker unit side terminal 21 is provided to project from the frame 11. The speaker unit side
terminal 21 is joined to the lead wire 18 by the solder 19. Thus, the speaker unit side terminal
21 is electrically connected to the voice coil 14 by the lead wire 18.
[0066]
Next, the operation of the speaker unit according to the present embodiment will be described. In
the speaker unit 10, the magnetic flux generated from the magnet 15 is guided by the plate 16
and the yoke 17, and is converged to the air gap in which the voice coil 14 is disposed to
generate a magnetic field. Then, when an alternating current flows through the voice coil 14, the
voice coil 14 vibrates up and down based on the left-hand rule of Fleming by the alternating
current flowing through the voice coil 14 and the magnetic field generated from the magnet 15.
Therefore, the diaphragm 12 attached to the voice coil 14 vibrates. Thereby, the electrical signal
(alternating current) is converted to sound (vibration).
[0067]
With reference to FIGS. 2 and 3, speaker unit 10 is accommodated in internal space 4 of box 2,
and the back surface of diaphragm 12 is disposed in internal space 4 of box 2. For this reason,
the sound emitted from the back surface of the diaphragm 12 is blocked by the box 2. Therefore,
interference of the sound emitted from the front surface of the diaphragm 12 by the sound
emitted from the rear surface is suppressed. Thereby, since the interference of sound can be
suppressed, the sound quality can be improved.
[0068]
Further, in the present embodiment, since the space region 6 is provided in the internal space 4,
the volume of the box 2 can be increased as compared with the case where the space region 6 is
not provided. Thereby, it is suppressed that the vibration of the diaphragm 12 is prevented by
the resistance of the air in the box 2. This can further improve the sound quality.
[0069]
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19
Although the case where the inner peripheral portion 22a at one end of the box side terminal 22
is formed in a concave shape as shown in FIG. 7 has been described above, the shape of the one
end of the box side terminal 22 is not limited thereto. Referring to FIG. 8, in the first modification
of the present embodiment, the inner peripheral portion 22 a at one end of the box-side terminal
22 may be formed in a rectangular shape having a notch in part of four sides. Further, referring
to FIG. 9, in the second modification of the present embodiment, the inner peripheral portion 22
a at one end of the box side terminal 22 may be formed in an elliptical shape. In this case, the
box side terminal 22 which is the second terminal surrounds the entire circumference of the
outer peripheral surface of the protrusion 21 a of the speaker unit side terminal 21 which is the
first terminal.
[0070]
In the above, as shown in FIG. 6, the speaker unit side terminal 21 and the lead wire 18 are
joined by the solder 19. Referring to FIG. 10, when the speaker unit side terminal 21 and the lead
wire 18 are soldered, the solder 19 may flow to the upper end side of the speaker unit side
terminal 21.
[0071]
In the present embodiment, the protrusion 21 a of the speaker unit side terminal 21 which is the
first terminal is formed of the first portion 21 f and the first portion 21 f located on the side
electrically connected to the voice coil 14. It also has a second portion 21s located on the side of
the box side terminal 22 which is the second terminal, and surrounded so as to sandwich at least
both sides by the box side terminal 22 which is the second terminal. The diameter of the second
portion 21s is smaller than the diameter of the first portion 21f.
[0072]
As shown in FIG. 10, since the diameter of the second portion 21s is smaller than the diameter of
the first portion 21f even when the solder 19 flows into the upper end side of the speaker unit
side terminal 21 at the time of soldering, It can suppress that the insertion of the box side
terminal 22 is prevented by the solder 19.
[0073]
Further, in the above, the speaker unit side terminal 21 of the present embodiment solders the
01-05-2019
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speaker unit side terminal 21 and the box side terminal even when the solder 19 flows to the
upper end side of the speaker unit side terminal 21 as shown in FIG. Although it has been
described that bonding can be performed at 19, the speaker unit side terminal 21 may suppress
the rising of the solder 19.
[0074]
Referring to FIG. 11, in the third modification of the present embodiment, the protrusion 21 a of
the speaker unit side terminal 21 which is the first terminal is located on the side electrically
connected to the voice coil 14. A second portion 21f and a second terminal located on the side of
the box side terminal 22 which is the second terminal than the first portion 21f and surrounded
at least on both sides by the box side terminal 22 which is the second terminal It has a portion
21s and a third portion 21t disposed between the first portion 21f and the second portion 21s.
The diameter of the third portion 21t is configured to be larger than the diameter of the first
portion 21f and the diameter of the second portion 21s.
[0075]
Since the diameter of the third portion 21 t is larger than the diameter of the first portion 21 f
and the diameter of the second portion 21 s, when the speaker unit side terminal 21 and the lead
wire 18 are soldered The rising of the solder 19 can be suppressed by the third portion 21t.
[0076]
Although the internal magnet type speaker unit has been described above, the present
embodiment can also be applied to an external magnet type speaker unit in which the magnet 15
is disposed on the outer peripheral side of the voice coil 14.
The present embodiment can also be applied to a horizontal speaker unit in which the voice coil
14 is formed to be larger in the width direction than in the thickness direction and is disposed on
one surface of the magnet 15.
[0077]
01-05-2019
21
Although the speaker unit has been described as being formed in a track shape in plan view, it
may be configured in a circular shape, an elliptical shape, or the like in plan view.
[0078]
Next, the function and effect of the speaker in the present embodiment will be described.
According to the speaker 1 of the present embodiment, the speaker unit side terminal 21 which
is the first terminal has the projecting portion 21a, and the box side terminal 22 which is the
other second terminal has the outer peripheral surface of the projecting portion 21a. It is
surrounded so as to sandwich at least from both sides.
Therefore, even if the speaker unit side terminal 21 and the box side terminal 22 are shifted in
the direction in which the projecting portion 21 a of the speaker unit side terminal 21 extends,
the shift of the interval can be suppressed. For this reason, the shift ¦ offset ¦ difference of the
speaker unit side terminal 21 and the box side terminal 22 in the direction to which the
protrusion part 21a extends can be accept ¦ permitted. Therefore, good soldering can be
performed even if high mounting accuracy and dimensional accuracy are not required for the
speaker unit side terminal 21 and the box side terminal 22 in the direction in which the
protruding portion 21 a extends.
[0079]
Further, since the box side terminal 22 surrounds the outer peripheral surface of the projecting
portion 21a so as to sandwich at least both sides, the speaker unit side terminal 21 and the box
side intersect the direction in which the projecting portion 21a of the speaker unit side terminal
21 extends. Even if the terminals 22 deviate from each other, the deviation of the intervals can be
suppressed. Therefore, it is possible to allow deviation between the speaker unit side terminal 21
and the box side terminal 22 in the direction intersecting the extending direction of the
projecting portion 21a. Therefore, good soldering can be performed even if high mounting
accuracy and dimensional accuracy are not required for the speaker unit side terminal 21 and
the box side terminal 22 in the direction intersecting the extending direction of the protruding
portion 21a. This can improve the workability. Also, the soldering quality can be improved.
Therefore, the conduction failure can be suppressed.
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[0080]
In addition, since the box 2 is disposed so as to be in close contact with the housing 3 inside the
housing 3 and has the box-side terminal 22 that protrudes into the internal space 4, the speaker
unit 10 is There is no need to pull the connected wires out of the inside of the box 2 through the
holes provided in the box 2. Since there is no need to seal the hole with an adhesive or the like in
the state where the wire is pulled out, the workability can be improved.
[0081]
Also, since it is not necessary to pull the wire connected to the speaker unit from the inside of the
box to the outside through the hole provided in the box as in the conventional case, the amount
of adhesive decreases when sealing the hole with an adhesive or the like. Insufficient sealing can
prevent the sound quality from becoming unstable due to sound interference. On the other hand,
it is also possible to prevent the sound quality from becoming unstable because the amount of
adhesive increases and the volume of the adhesive occupied in the box 2 increases. This can
improve the sound quality.
[0082]
With the speaker unit 10 housed in the internal space 4, the speaker unit side terminal 21 has
the projecting portion 21 a in the internal space 4, and the box side terminal 22 sandwiches the
outer peripheral surface of the projecting portion 21 a from at least both sides. As you surround.
Therefore, it is not necessary to process the wire in the internal space 4 as in the prior art. The
processing efficiency can be improved because it is not necessary to process the wire which
requires many man-hours.
[0083]
In addition, since the abnormal sound is not generated by the contact of the wound wire with the
speaker unit 10 and the box 2, the sound quality can be improved.
[0084]
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23
In addition, since the volume of the inner space does not decrease due to the volume of the
wound wire, it is possible to suppress the deterioration of the sound pressure.
This can improve the sound quality.
[0085]
In addition, since the number of operation steps is smaller compared to the conventional case
where both ends of the wire are connected, the workability can be improved.
[0086]
Further, the speaker unit side terminal 21 has the projecting portion 21a in the internal space 4,
and the box side terminal 22 surrounds the outer peripheral surface of the projecting portion
21a so as to sandwich at least both sides.
Therefore, the speaker unit side terminal 21 and the box side terminal 22 are disposed in the
internal space 4. This can save space.
[0087]
In addition, it is possible to prevent a conduction failure due to the contact of the spring piece
coming off due to vibration as in the prior art, a conduction failure due to plastic deformation of
the spring piece, and a conduction failure due to dirt on the contact of the spring piece.
Moreover, the shift of the attachment position by the reaction force of a spring piece can be
prevented. Therefore, when attaching the speaker unit 10 to the box 2, a mechanism for holding
the position of the spring piece and work are not required to prevent these conduction defects
and to prevent the attachment position from shifting. Further, in order to secure the area for
providing the spring pieces, there is no need to restrict the arrangement of the back holes of the
frame 11 and to enlarge the outer diameter of the frame 11. Therefore, space saving can be
achieved. Moreover, since the above-mentioned work is not required, the workability can be
improved.
01-05-2019
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[0088]
Further, in the speaker 1 of the present embodiment, the box side terminal 22 may surround the
entire circumference of the outer peripheral surface of the protrusion 21 a of the speaker unit
side terminal 21. Thereby, the deviation between the speaker unit side terminal 21 and the box
side terminal 22 can be further allowed. Therefore, the workability can be further improved.
[0089]
Moreover, in the speaker 1 of the present embodiment, the speaker unit side terminal 21 may be
a first terminal, and the box side terminal 22 may be the second terminal. As a result, since the
speaker unit side terminal 21 has the projecting portion 21 a, the extending direction of the
projecting portion 21 a matches the thickness direction of the speaker 1. Even if high mounting
accuracy and dimensional accuracy are not required for the speaker unit side terminal 21 and
the box side terminal 22 in the thickness direction of the speaker 1, good soldering can be
performed. Therefore, good soldering can be applied to the speaker units 10 having different
heights in the same box 2. This can improve the workability. Also, the soldering quality can be
improved. Therefore, the workability can be improved. Also, the same box 2 can be used for
speaker units 10 having different heights. For this reason, cost reduction is possible.
[0090]
Further, since the extending direction of the protrusion 21a coincides with the thickness
direction of the speaker 1, the occupation ratio of the projected area of the speaker unit side
terminal 21 viewed from the extending direction of the protrusion 21a can be reduced.
Therefore, restrictions on the position of the back hole of the frame 11 can be suppressed.
Therefore, the workability can be improved.
[0091]
Further, in the speaker 1 of the present embodiment, the projecting portion 21a of the speaker
unit side terminal 21 is closer to the first portion 21f and the first portion 21f located on the side
electrically connected to the voice coil 14. A second portion 21 s may be included, which is
located on the box side terminal 22 side and surrounded so as to sandwich at least both sides by
01-05-2019
25
the box side terminal 22. In this case, the diameter of the second portion 21s is configured to be
smaller than the diameter of the first portion 21f. The diameter of the second portion 21s is
configured to be smaller than the diameter of the first portion 21f, so soldering when connecting
the voice coil 14 and the first portion 21f of the speaker unit side terminal 21 Even when the
solder flows into the upper end side of the speaker unit side terminal 21 at the time of the above,
it is possible to suppress that the insertion of the box side terminal 22 is prevented by the solder.
[0092]
Further, in the speaker 1 of the present embodiment, the projecting portion 21a of the speaker
unit side terminal 21 is closer to the first portion 21f and the first portion 21f located on the side
electrically connected to the voice coil 14. A third portion disposed between the second portion
21s, the first portion 21f, and the second portion 21s located on the box side terminal 22 side
and surrounded so as to sandwich at least both sides by the box side terminal 22. And 21t may
be included. In this case, the diameter of the third portion 21t is configured to be larger than the
diameter of the first portion 21f and the diameter of the second portion 21s. Since the diameter
of the third portion 21t is larger than the diameter of the first portion 21f and the diameter of
the second portion 21s, the voice coil 14 and the first portion 21f of the speaker unit side
terminal 21 are formed. The third portion 21t can suppress creeping up of the solder 19 during
soldering when connecting the two.
[0093]
Also. In the speaker 1 of the present embodiment, the box 2 includes the first box portion 2a to
which the speaker unit 10 is attached, and the first box portion 2a and the first box portion 2a in
a state where the speaker unit 10 is accommodated in the internal space 4. It includes a second
box portion 2 b which can be engaged and occlude the internal space 4.
[0094]
With the speaker unit 10 housed in the first box portion 2 a and the inner space 4, the box 2 can
be engaged with the first box portion 2 a, and the second space can be closed in the inner space
4. Since the box portion 2 b is included, the internal space 4 can be closed in a state where the
speaker unit 10 is disposed in the internal space 4.
01-05-2019
26
Therefore, attachment of the speaker unit 10 to the internal space 4 and closing of the internal
space 4 are easy. This can improve the workability.
[0095]
Second Embodiment First, the configuration of a portable information terminal in the present
embodiment will be described. In the present embodiment, a portable information terminal
provided with the speaker of Embodiment 1 will be described.
[0096]
Referring to FIGS. 12 and 13, portable information terminal 100 in the present embodiment is a
mobile phone, and includes upper case 101, display unit 102, sound output hole 103, hinge unit
104, lower case 105, The operation button 106, the numeral button 107, the display unit 111,
the sound output hole 112, and the speaker of the first embodiment not shown are mainly
provided.
[0097]
Referring to FIG. 12, a display unit 102 is provided on the surface of the upper housing 101.
A sound output hole 103 is formed on one end side of the surface of the upper housing 101. A
hinge portion 104 is formed on the other end side of the upper housing 101. A hinge portion
104 is formed on one end side of the lower housing 105. The upper housing 101 and the lower
housing 105 are connected to be openable and closable by the hinge portion 104. An operation
button 106 is formed on the side of the hinge portion 104 on the surface of the lower housing
105. A numeric button 107 is formed from the operation button 106 in the direction opposite to
the hinge portion 104.
[0098]
Referring to FIG. 13, a display unit 111 is provided on the back surface of upper housing 101. A
sound emission hole 112 is formed on the side of the display unit 111.
01-05-2019
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[0099]
The speaker according to the first embodiment not shown is provided inside the upper housing
101. Sound is emitted from the speaker mainly to the outside of the portable information
terminal 100 through the sound emission holes 103 and 112.
[0100]
Next, the operation and effect of the portable information terminal in the present embodiment
will be described. According to the portable information terminal 100 in the present
embodiment, since the speaker unit described in the above-mentioned Embodiment 1 is provided,
the same effects as those of Embodiment 1 are obtained.
[0101]
In addition, since the speaker described in the above-mentioned Embodiment 1 is provided, the
portable information terminal 100 can be saved in space by saving the speaker. Also, the
freedom of design can be improved.
[0102]
In the present embodiment, the mobile information terminal has been described by way of an
example of a mobile phone. However, the present invention is not limited to this, and may be a
smartphone, a PDA (Personal Digital Assistants), a game machine, a personal computer, or the
like.
[0103]
In addition, each above-mentioned embodiment can be combined suitably.
It should be understood that the embodiments disclosed herein are illustrative and nonrestrictive in every respect. The scope of the present invention is indicated not by the above
01-05-2019
28
description but by the claims, and is intended to include all modifications within the meaning and
scope equivalent to the claims.
[0104]
The present invention can be particularly advantageously applied to a speaker having a speaker
unit and a box and a portable information terminal provided with the same.
[0105]
REFERENCE SIGNS LIST 1 speaker 2 box 2 a first box portion 2 b second box portion 3 housing 4
internal space 5 speaker connection portion 6 space area 7 engagement portion 10 speaker unit
11 frame 11 a Support part, 11b inner peripheral part, 11c outer peripheral part, 12
diaphragms, 12a central vibration part, 12b voice coil mounting part, 12c edge part, 12d frame
mounting part, 13 diaphragm reinforcing ring, 14 voice coil, 15 magnets, 16 Plate, 17 yoke, 18
lead wire, 21 speaker unit side terminal, first terminal, 21a projecting portion, 21f first portion,
21s second portion, 21t third portion, 22 box side terminal, second Terminal, 22a inner
peripheral part, 100 personal digital assistant, 101 upper housing, 102 display part, 103 sound
emitting hole, 104 hinge part, 105 lower part Housing, 106 an operation button, 107 number
buttons 111 display unit, 112 sound emission hole.
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