close

Вход

Забыли?

вход по аккаунту

JP2001245390

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 JP2001245390
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
electroacoustic transducer used in a hearing aid or the like.
[0002]
2. Description of the Related Art As this type of electroacoustic transducer, for example, one
disclosed in Japanese Patent Application Laid-Open No. 58-99099 is known. The electro-acoustic
transducer disclosed in Japanese Patent Application Laid-Open No. 58-99099 includes a
substantially flat diaphragm and a drive pin for transmitting the vibration of the armature to the
diaphragm. One end of the drive pin is inserted into a small hole formed in the central portion of
the armature and fixed by bonding or spot welding or the like. Further, the other end of the drive
pin is inserted into a small hole formed in the diaphragm and fixed by adhesion or the like.
[0003]
However, in the electroacoustic transducer as disclosed in JP-A-58-99099, the positions of the
small holes formed in the armature and the small holes formed in the diaphragm are used. The
drive pin needs to be fixed to the diaphragm if the position of the small hole formed in the
armature and the position of the small hole formed in the diaphragm are out of alignment
because it is necessary to accurately match the position. It has the problem that it can not do.
11-05-2019
1
Also, even when the position of the small hole formed in the armature and the position of the
small hole formed in the diaphragm are exactly matched, when the drive pin is fixed to the small
hole of the armature in a tilted state, It becomes impossible to fix the pin to the diaphragm.
[0004]
The present invention has been made in view of the above-described points, and an object of the
present invention is to provide an electroacoustic transducer capable of easily fixing a drive pin
to a diaphragm.
[0005]
SUMMARY OF THE INVENTION An electroacoustic transducer according to the present invention
is an electroacoustic transducer comprising a substantially flat diaphragm and a drive pin for
transmitting the vibration of an armature to the diaphragm. The drive pin has a diaphragm side
flat portion substantially parallel to the diaphragm, and a hole for applying an adhesive is formed
in a portion facing the diaphragm side flat portion of the diaphragm. The diaphragm side flat
portion of the drive pin and the diaphragm are characterized by being fixed by an adhesive
applied from the hole.
[0006]
In the electro-acoustic transducer according to the present invention, the drive pin has a
diaphragm side flat portion substantially parallel to the diaphragm, and an adhesive is applied to
a portion facing the diaphragm side flat portion of the diaphragm. And the diaphragm on the
diaphragm side of the drive pin and the diaphragm are fixed by the adhesive applied from the
hole, so the precise positioning required in the above-mentioned prior art is achieved. Can be
omitted, and the drive pin can be easily fixed to the diaphragm.
[0007]
In addition, since a hole for applying an adhesive is formed on the diaphragm, it is possible to
confirm via the hole whether the diaphragm and the drive pin are fixed, and If the fixing with the
drive pin is insufficient, the adhesive can be applied again, so that the fixing between the
diaphragm and the drive pin can be performed more reliably.
[0008]
The drive pin has an armature side flat portion which extends in a direction substantially
11-05-2019
2
orthogonal to the diaphragm side flat portion and is fixed to the end of the armature, and the
diaphragm side flat portion and the armature side flat portion are integrated. Preferably, it is
formed.
Thus, the drive pin has an armature side flat portion that extends in a direction substantially
orthogonal to the diaphragm side flat portion and is fixed to the end of the armature, and the
diaphragm side flat portion and the armature side flat portion By integrally forming, the
structure of the drive pin which can be easily fixed to the diaphragm can be realized simply and
at low cost.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the electroacoustic
transducer according to the present invention will be described in detail below with reference to
the drawings.
[0010]
FIG. 1 is a perspective view of an electro-acoustic transducer according to an embodiment of the
present invention, FIG. 2 is a side view with a part of the housing of the electro-acoustic
transducer cut away, and FIG. It is a perspective view in the state which took the top housing of
the acoustic transducer, FIG. 4 is an exploded perspective view of an electroacoustic transducer
similarly.
[0011]
The electroacoustic transducer 1 has a housing 2 and a diaphragm unit portion 3 as shown in
FIG.
The housing 2 is composed of a top housing 4 and a bottom housing 5, and the top housing 4
and the bottom housing 5 are fixed to each other by using laser welding, an adhesive or the like
in a state in which the diaphragm unit portion 3 is held.
The bottom housing 5 has a box shape whose upper surface is open, and the upper surface
opening is covered with the diaphragm unit 3 as shown in FIG. 3 and defined by the bottom
housing 5 and the diaphragm unit 3 As shown in FIGS. 2 and 4, the drive unit portion 10 is
11-05-2019
3
disposed in the space to be formed.
The drive unit portion 10 is fixed to the spacer 6 by laser welding or the like in a state of being
mounted on the bottom portion of the bottom housing 5 via the spacer 6.
The spacer 6 is fixed to the bottom housing 5 (bottom) by using laser welding and an adhesive.
[0012]
The top surface of the diaphragm unit 3 is covered by the top housing 4.
In the top housing 4, a notch 7 is formed in part thereof, and as shown in FIG. 2, the top housing
4 is defined by the diaphragm unit 3 and the top housing 4 via the notch 7. And the space
outside the housing 2 communicate with each other.
[0013]
Next, the configuration of the drive unit unit 10 will be described based on FIGS. 5 to 9. 5 is a
plan view of the drive unit portion 10, FIG. 6 is a side view of the same, FIG. 7 is a back view of
the same, FIG. 8 is a front view of the same, and FIG. FIG. The drive unit portion 10 includes an
armature portion 11, a bobbin portion 21, a pair of magnets 31 and 31, and a drive pin 41.
[0014]
The armature portion 11 is a plate-like member obtained by bending a metal plate into a
substantially E shape in plan view, as also shown in FIG. 9, and the substrate portion 12 and a
pair of extending from both ends of the substrate portion 12 It has side plate portions 13 and 13
and an armature 14 extending between the side plate portions 13 and 13 from the central
portion of the substrate portion 12.
[0015]
The bobbin portion 21 has a base portion 22, a coil winding portion 23 around which the
conducting wire 33 is wound, and a magnet positioning portion 24 in which a pair of magnets 31
11-05-2019
4
and 31 are positioned, as shown in FIGS. The base portion 22, the coil winding portion 23, and
the magnet positioning portion 24 are integrally formed of a resin material.
[0016]
The base portion 22 constitutes a surface substantially parallel to the base plate portion 12 of
the armature portion 11. In the central portion of the base portion 22, a hole 25 through which
the armature 14 passes is formed.
Further, the base portion 22 is provided with coil side terminal portions 34 and 34 to which the
end portions of the conductive wires 33 are electrically connected and signal input terminal
portions 35 and 35 to which a signal is input from the outside. .
The coil side terminals 34, 34 and the signal input terminals 35, 35 are electrically connected
inside the base 22, and when the bobbin 21 is integrally formed, the base 22 is formed. It is
provided by being inserted.
[0017]
As shown in FIGS. 6-8, the portions of the base 22 where the signal input terminal portions 35,
35 are provided have projections 26, 26 projecting toward the end portions of the signal input
terminal portions 35, 35. It is integrally formed. The protrusions 26, 26 are inserted into the
through holes 8, 8 formed in the bottom of the bottom housing 5 when the drive unit 10 is
assembled to the bottom housing 5, and the protrusions 26, Positioning of the drive unit portion
10 with respect to the bottom housing 5 is performed by inserting the through holes 26 into the
through holes 8 and 8. When the drive unit portion 10 is fixed to the bottom housing 5, as
shown in FIG. 2, a part of the protrusions 26, 26 and the signal input terminal portions 35, 35
project out of the housing 2 become. An adhesive is applied between the protrusions 26 and 26
and the through holes 8 and 8.
[0018]
A coil 36 is formed in the coil winding portion 23 by winding the conducting wire 33. In the
11-05-2019
5
present embodiment, a copper wire having a wire diameter of about 25 μm is used as the
conductive wire 33, and the conductive wire 33 is wound around the coil winding portion 23
about 1000 times. The ends of the conducting wire 33 are twisted to the coil side terminals 34,
34 and then arc welded and fixed to the coil side terminals 34, 34 for connection.
[0019]
The magnet positioning portion 24 is provided with gap forming portions 27, 27 for positioning
the pair of magnets 31, 31 in a state of having a predetermined interval. When the magnets 31
31 sandwich the gap forming portions 27 27, a gap for inserting the tip of the armature 14 is
formed between the magnets 31 31. The magnets 31 31 are fixed to the magnet holding portion
28 provided outside the magnet positioning portion 24 by adhesion or the like. The magnet
holding portion 28 is made of a magnetic material different from the magnet positioning portion
24 (the bobbin portion 21), and is disposed outside the portion constituting the magnet
positioning portion 24 when the bobbin portion 21 is integrally formed. As a result, it is provided
integrally with the magnet positioning portion 24 (bobbin portion 21). The magnet holding
portion 28 does not necessarily have to be configured to be integrally provided with the magnet
positioning portion 24 (bobbin portion 21) when the bobbin portion 21 is integrally molded, and
bonding is performed after the bobbin portion 21 is integrally molded. You may comprise so that
it may fix to the bobbin part 21 by etc.
[0020]
The drive pin 41 has a diaphragm side flat portion 42 substantially parallel to a diaphragm 52
described later, and an armature side flat portion 43 extending in a direction substantially
orthogonal to the diaphragm side flat portion 42 and fixed to an end of the armature 14. have.
The diaphragm side flat portion 42 and the armature side flat portion 43 are integrally formed
by bending a metal plate into a substantially L shape. Here, the diaphragm side flat portion 42
constitutes a diaphragm side flat portion in each of the claims.
[0021]
In the armature portion 11 and the bobbin portion 21, the armature 14 is inserted from the hole
25 of the base 22, and penetrates the gap formed in the coil 36 and between the magnets 31, 31
as shown in FIGS. As shown, the end of the armature 14 is assembled with the end projecting
11-05-2019
6
from the end of the bobbin portion 21 (the magnet positioning portion 24). The assembly of the
armature portion 11 and the bobbin portion 21 is performed by fixing the side plate portions 13
and 13 of the armature portion 11 to the magnet holding portion 28 by laser welding or the like.
In the state where the side plate portions 13 and 13 are fixed to the magnet holding portion 28
and the armature portion 11 and the bobbin portion 21 are assembled, between the base portion
22 of the bobbin portion 21 and the substrate portion 12 of the armature portion 11 A
predetermined gap is formed. Therefore, the contact between the base portion 22 and the
substrate portion 12 is prevented, and it is possible to prevent the bobbin portion 21 (base
portion 22) from adversely affecting the vibration of the armature 14.
[0022]
The armature-side flat portion 43 of the drive pin 41 is fixed by laser welding or the like to the
end portion of the armature 14 protruding from the end portion of the bobbin portion 21
(magnet positioning portion 24) as shown in FIGS. . As shown in FIGS. 10 and 11, the drive pin
41 is integrally formed with a positioning portion 44 when fixed to the end of the armature 14,
and this positioning portion 44 has an armature-side flat portion 43. After being fixed to the end
of the armature 14, the drive pin 41 (the armature side flat portion 43) is cut off and separated.
[0023]
Next, the structure of the diaphragm unit part 3 is demonstrated based on FIGS. 12-15. FIG. 12 is
a plan view of the diaphragm unit 3, FIG. 13 and FIG. 14 are enlarged cross-sectional views of the
same, and FIG. 15 is an exploded perspective view of the same. The diaphragm unit portion 3
includes a diaphragm frame 51 as a frame, a diaphragm 52 as a substantially flat diaphragm, and
a thermoplastic resin film 53 as a diaphragm (diaphragm sheet). In addition to the resin film, the
vibrating film can be formed of silicone rubber or the like.
[0024]
The diaphragm 52 is disposed in the diaphragm frame 51 as shown in FIG. The resin film 53 is
fixed to the diaphragm frame 51 and the upper surface of the diaphragm 52 to vibratably
support the diaphragm 52 with respect to the diaphragm frame 51. Fixing of the resin film 53 to
the diaphragm frame 51 and the diaphragm 52 is performed by applying an adhesive to the
upper surfaces of the diaphragm frame 51 and the diaphragm 52 and then heating and pressing.
11-05-2019
7
The portion of the resin film 53 between the diaphragm frame 51 and the diaphragm 52 is, as
shown in FIG. 14, a generally circular shape which is convex or concave toward the space defined
by the bottom housing 5 and the diaphragm unit 3. It is formed in an arc shape, and is
configured to secure the vibration width of the diaphragm 52 so as not to inhibit the vibration.
[0025]
The diaphragm 52 has a substantially rectangular shape in a plan view, and the concave portions
54, 54 for securing rigidity are formed. A hole 55 and a drive pin fixing hole 56 for fixing the
drive pin are formed in a flat portion of the diaphragm 52 to which the resin film 53 is fixed. The
drive pin fixing hole 56 is formed at a position corresponding to the diaphragm side flat portion
42 of the drive pin 41, and the hole 55 and the drive pin fixing hole 56 are predetermined in the
long side direction of the diaphragm 52. It will be formed at a position near the short side of the
diaphragm 52 at intervals. Here, the drive pin fixing hole 56 constitutes a hole in each claim.
[0026]
The hole 55 formed in the flat portion to which the resin film 53 of the diaphragm 52 is fixed is
covered with the resin film 53, and the vent hole 57 is formed in the portion corresponding to
the hole 55 of the resin film 53. ing. The vent hole 57 communicates with a space outside the
housing 2 and is a pressure difference between a space defined by the diaphragm unit 3 and the
top housing 4 and a space defined by the bottom housing 5 and the diaphragm unit 3. That is, it
is for adjusting the pressure difference between the chambers formed by being sandwiched
between the diaphragm unit 3 (the diaphragm 52 and the resin film 53), and is formed by
irradiating a laser beam. In the present embodiment, the diameter of the vent hole 57 is set to
about 30 μm.
[0027]
When the resin film 53 is fixed to the diaphragm 52, the drive pin fixing hole 56 is also covered
with the resin film 53 like the hole 55, but the drive pin fixing hole of the resin film 53 is The
portion covering the portion 56 is removed by irradiating the laser beam to a size larger than the
outer diameter of the drive pin fixing hole 56.
[0028]
11-05-2019
8
When the resin film 53 is fixed to the diaphragm frame 51 and the diaphragm 52, the diaphragm
frame 51 and the diaphragm 52 are provided between the diaphragm frame 51 and the
diaphragm 52 so that the diaphragm frame 51 does not inhibit the vibration of the diaphragm
52. Is positioned with a predetermined gap formed, as shown in FIG.
Positioning of the diaphragm 52 is performed by inserting a positioning pin (not shown) into the
hole 55 and the drive pin fixing hole 56. Further, the positioning of the diaphragm frame 51 is
performed by sandwiching the outside with a positioning jig (not shown).
[0029]
Thus, the hole 55 and the drive pin fixing hole 56 can be used as a hole for positioning the
diaphragm 52 when the resin film 53 is fixed to the diaphragm frame 51 and the diaphragm 52,
and the diaphragm 52 Positioning can be performed reliably. In addition, it is not necessary to
form a positioning hole separately, and the manufacturing process for forming the diaphragm 52
can be simplified.
[0030]
The bottom housing 5 and the diaphragm unit portion 3 are fixed by using laser welding, an
adhesive or the like in a state where the upper surface opening of the bottom housing 5 to which
the drive unit portion 10 is fixed is covered by the diaphragm unit portion 3 . Since the drive pin
fixing hole 56 is formed at a position corresponding to the flat surface 42 of the diaphragm 52,
in the state where the bottom housing 5 and the diaphragm unit 3 (diaphragm frame 51) are
fixed, The diaphragm side flat portion 42 is positioned below the drive pin fixing hole 56. When
the diaphragm side flat portion 42 is positioned below the drive pin fixing hole 56, an adhesive is
applied (injected) from the drive pin fixing hole 56 to fix the diaphragm side flat portion 42 and
the drive pin. The hole 56 is fixed.
[0031]
In order to firmly fix the diaphragm side flat portion 42 and the drive pin fixing hole portion 56,
with the bottom housing 5 and the diaphragm unit portion 3 (the diaphragm frame 51) fixed, the
diaphragm side flat portion 42 and It is preferable to form a predetermined gap between the
diaphragm 52 and the adhesive to flow.
11-05-2019
9
[0032]
For example, when bottom housing 5 and diaphragm unit 3 (diaphragm frame 51) are fixed due
to an error generated during molding of various parts or a positional deviation generated during
assembly and fixing, diaphragm side flat portion 42 and the diaphragm In some cases, the
diaphragm side flat portion 42 (drive pin 41) presses against the diaphragm 52 by coming into
contact with 52, but the diaphragm is applied (injected) into the drive pin fixing hole portion 56.
The side flat portion 42 and the drive pin fixing hole 56 can be fixed.
Further, the pressing of the diaphragm 52 by the diaphragm side flat portion 42 (drive pin 41)
can also be absorbed by the movement of the diaphragm 52. Further, even if a gap of a
predetermined size or more is formed between the diaphragm side flat portion 42 and the
diaphragm 52, the gap can be filled with an adhesive.
[0033]
As described above, since the drive pin fixing hole 56 for applying (injecting) the adhesive is
formed in the diaphragm 52, the diaphragm 52 and the drive pin 41 are provided via the drive
pin fixing hole 56. It is possible to confirm whether or not the fixing is fixed, and if the fixing
between the diaphragm 52 and the drive pin 41 is insufficient, apply (inject) the adhesive again
from the drive pin fixing hole 56. This makes it possible to fix the diaphragm 52 and the drive
pin 41 more reliably.
[0034]
Next, the operation of the electroacoustic transducer 1 configured as described above will be
described.
In the electro-acoustic transducer 1, a magnetic circuit is configured by the pair of magnets 31
and 31, and a DC magnetic field is generated between the magnets 31 and 31. Here, when a
signal is applied to the coil 36 through the signal input terminal portions 35, 35, an AC magnetic
flux is generated, and this AC magnetic flux is generated by the armature 14, the magnets 31, 31,
the magnet holding portion 28, the side plate portion 13, An alternating current magnetic field is
generated between the magnets 31 and 31 and the armature 14 by flowing through the
11-05-2019
10
magnetic circuit consisting of the substrate 13 and the substrate 13. As a result of the AC
magnetic field being superimposed on the above-described DC magnetic field, the armature 14
vibrates. The vibration of the armature 14 is transmitted to the diaphragm 52 through the drive
pin 41, and the diaphragm 52 vibrates to fluctuate the pressure in the space defined by the
diaphragm unit portion 3 and the top housing 4, and this pressure The fluctuation becomes a
sound wave and is transmitted from the notch 7 of the top housing 4 to the outside of the
electroacoustic transducer 1.
[0035]
As described above, in the electro-acoustic transducer 1 according to this embodiment, the hole
55 is formed in the flat portion to which the resin film 53 of the diaphragm 52 is fixed, and the
portion corresponding to the hole 55 of the resin film 53 is Since the vent hole 57 is formed, the
portion corresponding to the hole 55 of the resin film 53 in which the vent hole 57 is formed has
a substantially planar shape, so the position where the vent hole 57 is formed is shifted. Also in
this case, the change of the opening area of the vent hole 57 is suppressed. Therefore, the
opening area of the vent hole 57 can be easily managed, and the variation in the sound pressure
frequency characteristic of each product is suppressed, and the electro-acoustic transducer 1
having an appropriate sound pressure frequency characteristic is obtained. You can get it.
[0036]
Further, in the electro-acoustic transducer 1 according to the present embodiment, the drive pin
41 is a diaphragm side flat portion 42 substantially parallel to the diaphragm 52, and an
armature side flat portion extending in a direction substantially orthogonal to the diaphragm side
flat portion 42. 43 and the armature side flat portion 43 is fixed to the end of the armature 14. A
drive pin fixing hole 56 for applying (injecting) an adhesive is formed in a portion of the
diaphragm 52 opposed to the diaphragm side flat portion 42, and the diaphragm side flat portion
42 of the drive pin 41 and the diaphragm 52 are formed. Is fixed by the adhesive applied
(injected) from the drive pin fixing hole 56, so that the accurate positioning required in the prior
art can be omitted, and the diaphragm 52 of the drive pin 41 can be omitted. Can be fixed easily.
[0037]
Further, in the electro-acoustic transducer 1 according to the present embodiment, since the
diaphragm side flat portion 42 and the armature side flat portion 43 drive pin 41 are integrally
formed, the drive pin can be easily fixed to the diaphragm 52. The structure 41 can be realized
11-05-2019
11
simply and at low cost.
[0038]
As described above in detail, according to the present invention, the drive pin has a diaphragm
side flat portion substantially parallel to the diaphragm and is opposed to the diaphragm side flat
portion of the diaphragm. A hole for applying an adhesive is formed in the portion where the
adhesive is applied, and the diaphragm side flat portion of the drive pin and the diaphragm are
fixed by the adhesive applied from the hole. Can omit the exact positioning required.
As a result, according to the present invention, it is possible to provide an electroacoustic
transducer capable of easily fixing the drive pin to the diaphragm.
[0039]
Further, according to the present invention, since the hole for applying the adhesive is formed in
the diaphragm, it is confirmed that the diaphragm and the drive pin are fixed via the hole. In
addition to the above, when the fixation between the diaphragm and the drive pin is insufficient,
the adhesive can be applied again, so that the fixation between the diaphragm and the drive pin
can be performed more reliably.
11-05-2019
12
1/--страниц
Пожаловаться на содержимое документа