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DESCRIPTION JPH08126086

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DESCRIPTION JPH08126086
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
sound pressure adjustment method in a sounding device for the purpose of clearly transmitting
information at a predetermined predetermined sound pressure range.
[0002]
2. Description of the Related Art Conventionally, as a method of adjusting the sound pressure in
this type of sound producing apparatus, as disclosed in Japanese Utility Model Application
Publication Nos. 56-88296 and 58-149796, a sound emission hole is formed in a case. To adjust
the opening area of the sound output hole, the sound pressure adjuster is movable between the
fully open position and the fully closed position of the sound output hole, and the opening area
by the movement adjustment of the sound pressure adjuster There has been a method of
adjusting the sound pressure to a predetermined range by the adjustment of.
[0003]
There is also a method in which the accuracy of each part is selected in advance from the design
stage so as to fall within the sound pressure range of the standard, and sound pressure
adjustment is not required after assembly.
[0004]
However, according to the method of adjusting the opening area of the sound output hole by the
movable sound pressure adjusting member, in the environment which vibrates after setting the
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sound pressure in the manufacturing process. When used, the sound pressure regulator may
move due to the vibration, and the sound pressure may be changed, resulting in a defect that is
unreliable.
[0005]
In particular, in the case of a sounding apparatus that does not need to perform sound pressure
adjustment or can not adjust sound pressure after manufacturing, the change in the sound
pressure has been a serious concern.
[0006]
Further, in the case where the sound pressure adjusting member is configured to be movable, the
structure is also complicated and there is a drawback that the cost for materials, processing and
the like is increased.
[0007]
On the other hand, according to the method of selecting and designing the accuracy of each part
so that it falls within the sound pressure range of the standard from the above design stage, high
accuracy parts can not be expected, but parts with high accuracy are required. Because of this,
there is a drawback that the cost is high.
[0008]
Therefore, in view of the above problems, it is an object of the present invention to provide a
sound pressure adjustment method in a sounding device, in which the reliability is improved and
the cost is reduced.
[0009]
According to a first technical means for achieving the above object, a sounding body is provided
in a case main body, and sound is emitted by a sound emitting hole formed in the case main
body. In the sound pressure adjustment method in the sound generator for adjusting the sound
pressure, small sound emission holes are sequentially formed in the case body until the sound
pressure reaches a specified value under sound pressure monitoring in the sound generation
state of the sounding body It is in the point of doing.
[0010]
Further, the case body may be made of a plastic material, and the case body may be melted by a
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heated sharp hole forming jig to sequentially form the small sound emitting holes.
[0011]
Further, the sound output hole forming portion of the case main body is made of a plastic
material, and the sound output hole forming portion is melted by a heated sharp hole forming jig
to sequentially form the small sound output holes. May be used.
[0012]
Furthermore, the method may be such that the sound output hole forming portion of the case
main body is formed in a thin-walled shape, and the small sound output holes are sequentially
formed in the sound output hole forming portion.
[0013]
Further, according to a second technical means for achieving the above object, the sound
producing body is provided in the case main body, and the sound producing for adjusting the
sound pressure emitted by the sound emitting hole formed in the case main body In the sound
pressure adjustment method in the device, in the sounding state of the sounding body, a small
sound emission hole is formed in the case body under the sound pressure monitoring, and the
sound pressure is not reached when the sound pressure has not reached the specified value. The
sound emission holes are successively formed larger until the specified value is reached.
[0014]
Furthermore, the case body may be made of a plastic material, and the case body may be melted
by a heated pyramid-shaped hole forming jig having a pointed tip so as to form the sound output
hole.
[0015]
Further, the sound emission hole forming portion of the case main body is made of a plastic
material, and the sound emission hole forming portion is melted by a heated conical hole forming
jig having a pointed end and the sound emission hole is formed. It may be a method of forming.
[0016]
Furthermore, the sound output hole forming portion of the case main body may be formed in a
thin-walled shape, and the sound output hole may be formed in the sound output hole forming
portion.
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[0017]
According to the first and second inventions, the sound pressure is adjusted simply by forming
the sound release hole in the case main body, and structurally less susceptible to vibration, and
Since sound pressure adjustment is performed at the final product stage, sound pressure
adjustment can be performed with very high accuracy, and reliability can be improved.
[0018]
In addition, the conventional sound pressure adjusting body is not necessary, the structure can
be simplified, high precision parts are not required, and the cost can be reduced.
[0019]
Further, according to the method of forming the sound output hole by melting the plastic portion
with the heated hole forming jig, the sound output hole can be easily formed.
[0020]
Further, the sound emission hole forming portion is formed in a thin-walled shape, and the sound
emission hole can be easily formed by the method of forming the sound emission hole in the
sound emission hole forming portion.
[0021]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The preferred embodiment of the
first invention will be described below with reference to the drawings. In FIG. 1, 1 is an
assembled sound producing device, which is a substrate in a case body 2 formed of a plastic
material. 3 is mounted, and a buzzer 4 as a sound generator is mounted on the substrate 3.
[0022]
Further, the upper wall 2a of the case body 2 located above the buzzer 4 is provided with a
plurality of small hole forming position marks 5 for forming a small sound emitting hole for
adjusting the sound pressure.
[0023]
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A hole forming jig 6 is made of a fine rod material whose lower end is formed in a pointed shape,
and is configured to be heatable.
A noise level meter 7 is disposed to monitor the sound pressure produced by the sound
producing device 1.
[0024]
The sound pressure adjustment of the sound producing device 1 produces the buzzer 4 in a
sound producing state as shown in FIG. 2A from the state where no sound emitting hole is
formed at all in the upper wall portion 2 a of the case body 2. The hole forming jig 6 is heated to
a temperature at which the case body 2 can be melted under sound pressure monitoring by the
noise level meter 7, and the hole forming jig 6 is lowered from above the predetermined hole
forming position mark 5 As shown in FIG. 2B, the position of the hole formation position mark 5
of the case body 2 is melted to form a first small-diameter (small) sound release hole 8.
At this time, the sound pressure is measured by the noise level meter 7. If the sound pressure
reaches a predetermined specified value, the sound pressure adjustment is completed.
[0025]
Also, if the sound pressure has not reached the specified value, the second sound release hole 8
is similarly formed as shown in FIG. 2 (c).
At this time, the sound pressure is measured by the noise level meter 7. If the sound pressure
reaches a predetermined specified value, the sound pressure adjustment is completed.
[0026]
Then, if the sound pressure has not yet reached the specified value, the next sound release hole 8
is formed in the same manner, and as shown in FIG. 2 (d) until the sound pressure reaches the
specified value. The sound release holes 8 are sequentially formed.
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[0027]
At this time, even if the sound output holes 8 are formed by the predetermined upper limit
number, if the sound pressure does not reach the specified value, it is treated as a product
failure.
[0028]
As described above, according to the first embodiment of the present invention, the small
diameter sound emission holes 8 are directly formed in the case main body 2 and the number of
the formations is adjusted. The method of adjusting the sound pressure by changing the total
area of the structure, which is structurally insensitive to vibration, and the sound pressure
adjustment with the final product stage, so the sound pressure adjustment with very high
accuracy Can improve the reliability.
Accordingly, the present invention is effective for an electronic unit or the like with built-in
sound producing device 1 that does not require post-manufacturing sound pressure adjustment,
and is particularly effective for an electronic unit with built-in sound producing device 1 for
vehicles mounted under strict standards and use conditions.
[0029]
Further, the conventional sound pressure adjusting body is not necessary, the structure can be
simplified, high precision parts are not required, and the material cost and the processing cost
can be reduced. The reduction can be achieved.
[0030]
Further, the case main body 2 made of a plastic material is melted by the heated hole forming jig
6 to form the sound output holes 8 sequentially, and the sound output holes 8 can be easily
formed.
[0031]
In the above embodiment, the sound output hole 8 has a circular shape, but it may have an
arbitrary shape such as a square.
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In addition, a minimum number of sound release holes 8 are previously formed in the case body
2 so that the sound pressure does not reach the specified value, and from that state, the sound
release holes 8 are sequentially formed under sound pressure monitoring. May be used.
In this case, the sound pressure adjustment operation can be made more efficient.
[0032]
Further, as a plastic material for forming the case body 2, it is preferable to use a material having
a melting point as low as possible without causing a problem within the operating temperature
standard of the sound emitting device 1 in terms of efficiency in sound pressure adjustment
work.
[0033]
Also, as the hole forming jig 6, for example, the temperature of the soldering iron may be
adjusted and used, and furthermore, the sound emitting hole 8 is mechanically formed by cutting
a square weight or a triangular pyramid or the like. May be
Further, the material of the case body 2 is not limited to plastic but may be metal or the like.
[0034]
FIGS. 3 to 5 show another embodiment of the first invention, and FIG. 3 shows a portion of the
case main body 2 mainly made of a metal material and which forms the sound output hole 8 of
the case main body 2. The sound emission hole forming portion 10 corresponding to the above is
made of a plastic material.
In this case, the rigidity of the case body 2 can be improved.
[0035]
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Further, in FIG. 4, in the sound output hole forming portion 10 of the case main body 2, only a
portion corresponding to the position where the small sound output hole 8 is formed is formed
to be thin.
In this case, the formation of the sound output hole 8 can be facilitated.
[0036]
Further, in FIG. 5, the entire sound output hole forming portion 10 of the case main body 2 is
formed to be thin.
Also in this case, the formation of the sound release hole 8 can be facilitated.
[0037]
The embodiments shown in FIGS. 4 and 5 are also particularly effective in the case of
mechanically forming the sound release hole 8.
[0038]
FIG. 6 shows an embodiment of the second invention, and as in the embodiment of the first
invention, the substrate 3 is mounted in the case main body 2 formed of the plastic material of
the sound producing device 1. A buzzer 4 as a sound generator is mounted on the upper side.
[0039]
Further, the upper wall portion 2a of the case main body 2 located above the buzzer 4 is
provided with a hole formation position mark 5 for forming a sound emission hole for adjusting
the sound pressure.
[0040]
The hole forming jig 6 is made of a large diameter brazing material, and the lower end portion of
the hole forming jig 6 is formed in a conical shape which is pointed toward the lower end, and is
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configured to be heatable.
Further, as in the first embodiment of the present invention, the noise level meter 7 is disposed
to monitor the sound pressure generated by the sound generation device 1.
[0041]
The sound pressure adjustment of the sound producing device 1 produces the buzzer 4 in a
sound producing state as shown in FIG. 7A from the state where no sound emitting hole is
formed at all in the upper wall portion 2a of the case body 2 The hole forming jig 6 is heated to a
temperature at which the case body 2 can be melted under sound pressure monitoring by the
noise level meter 7, and the hole forming jig 6 is lowered from above the predetermined hole
forming position mark 5 As shown in FIG. 7B, the position of the hole formation position mark 5
of the case body 2 is melted to form a small diameter (small) sound output hole 8.
At this time, the sound pressure is measured by the noise level meter 7. If the sound pressure
reaches a predetermined specified value, the sound pressure adjustment is completed.
[0042]
Further, when the sound pressure has not reached the specified value, the hole forming jig 6 is
lowered more than in the above case to make the sound emission hole 8 larger as shown in FIG.
7 (c). Do.
At this time, the sound pressure is measured by the noise level meter 7. If the sound pressure
reaches a predetermined specified value, the sound pressure adjustment is completed.
[0043]
Then, if the sound pressure has not yet reached the specified value, the sound release hole 8 is
similarly formed larger, and as shown in FIG. 7 (d) until the sound pressure reaches the specified
value. The sound release holes 8 are successively formed larger.
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[0044]
At this time, if the sound pressure does not reach the specified value even if the sound output
hole 8 of a predetermined size is reached, it is treated as a product failure.
[0045]
As described above, according to the embodiment of the second invention, the sound output hole
8 is directly formed in the case main body 2 and the size of the sound output hole 8 is adjusted.
This is a method of adjusting the sound pressure by changing the opening area, which is
structurally insusceptible to vibration, and the sound pressure is adjusted at the final product
stage, so the sound pressure can be adjusted with extremely high accuracy. It is possible to
improve the reliability.
Accordingly, the present invention is effective for an electronic unit or the like with built-in
sound producing device 1 that does not require post-manufacturing sound pressure adjustment,
and is particularly effective for an electronic unit with built-in sound producing device 1 for
vehicles mounted under strict standards and use conditions.
[0046]
Further, the conventional sound pressure adjusting body is not necessary, the structure can be
simplified, high precision parts are not required, and the material cost and the processing cost
can be reduced. The reduction can be achieved.
[0047]
Further, the case main body 2 made of a plastic material is melted by the heated hole forming jig
6 to form the sound output holes 8 sequentially larger, and the sound output holes 8 can be
easily formed.
[0048]
In the above embodiment, the sound output hole 8 has a circular shape, but it may have an
arbitrary shape such as a square.
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In addition, a sound release hole 8 of a minimum size in which the sound pressure does not reach
the specified value is formed in advance in the case main body 2, and the sound release hole 8 is
sequentially formed larger under the sound pressure monitoring from that state. It may be a
method of
In this case, the sound pressure adjustment operation can be made more efficient.
[0049]
Further, as the plastic material forming the case main body 2, similarly to the first invention,
using a material having a melting point as low as possible without causing a problem within the
operating temperature standard of the sound producing device 1 Preferred for efficiency in work.
[0050]
Further, as the hole forming jig 6, for example, the temperature of the soldering iron may be
adjusted and used, and the sound emitting hole 8 is mechanically formed by cutting a square
weight or a triangular pyramid or the like. May be
Further, the material of the case body 2 is not limited to plastic but may be metal or the like.
[0051]
Furthermore, as shown in FIG. 3, as in the first aspect of the invention, as shown in FIG. 3, the
case main body 2 is mainly made of metal material, and the sound output hole is formed
corresponding to the portion forming the sound output hole 8 of the case main body 2 The
portion 10 may be made of a plastic material.
In this case, the rigidity of the case body 2 can be improved.
Further, as shown in FIG. 5, the sound emission hole forming portion 10 of the case main body 2
may be formed in a thin shape.
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In this case, the formation of the sound output hole 8 can be facilitated.
[0052]
The embodiment shown in FIG. 5 is also particularly effective in the case of mechanically forming
the sound output hole 8.
[0053]
As described above, according to the sound pressure adjustment method in the sound generation
device of the present invention, in the sound generation state of the sound generator, until the
sound pressure reaches a specified value under the sound pressure monitoring, A small sound
emission hole is formed in the case main body under the monitoring of the sound pressure in the
method of forming the small sound emission hole sequentially in the case main body or in the
sound generation state of the sound generator, the sound pressure reaches a specified value In
the case where the sound pressure does not reach the specified value, the sound emission hole is
formed successively in large size, and the sound pressure is adjusted by forming the sound
emission hole in the case main body, so There is an advantage that the sound pressure can be
adjusted with extremely high accuracy, and the reliability can be improved, since the sound
pressure adjustment is not affected by the vibration and the sound pressure is adjusted at the
final product stage.
[0054]
Also, there is an advantage that the conventional sound pressure adjusting body is not necessary,
the structure can be simplified, and high-precision parts are not required, and the cost can be
reduced.
[0055]
Furthermore, according to the method of forming the sound output hole by melting the plastic
part with the heated hole forming jig, there is an advantage that the sound output hole can be
easily formed.
[0056]
Further, there is an advantage that the sound emission hole forming portion is formed in a thinwalled shape, and the sound emission hole can be easily formed even by the method of forming
the sound emission hole in the sound emission hole forming portion.
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[0057]
Brief description of the drawings
[0058]
1 is a cross-sectional perspective view of the main part showing an embodiment of the first
invention.
[0059]
2 is a process diagram showing the same sound pressure adjustment method.
[0060]
3 is a perspective view of the main part showing another embodiment.
[0061]
4 is a cross-sectional view of the main part showing another embodiment.
[0062]
5 is a cross-sectional view of the main part showing another embodiment.
[0063]
<Figure 6> It is the principal part cross section perspective view which shows the execution
example of 2nd invention.
[0064]
7 is a process diagram showing the same sound pressure adjustment method.
[0065]
Explanation of sign
[0066]
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1 Sounding Device 2 Case Body 4 Buzzer 6 Hole Forming Jig 7 Sound Level Meter 8 Sound
Output Hole 10 Sound Output Hole Forming Part
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