close

Вход

Забыли?

вход по аккаунту

?

JP2000270400

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 JP2000270400
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
electroacoustic transducer, and in particular, in the case where a terminal is constituted by a
spring, the thickness is reduced by improving the structure of the spring, and the sound
production space is expanded. It relates to what was devised to be able to do it.
[0002]
2. Description of the Related Art A conventional electroacoustic transducer is constructed, for
example, as shown in FIG. First, there is a case 201, which is formed of a top plate portion 203
and a cylindrical portion 205, and a sound emission hole 207 is formed at the center position of
the top plate portion 203, and resonance is made inside. A space 208 is formed. In the case 201,
a pole piece 214 having an iron core 213 attached to a central position of the substrate 209 and
the base 211 is attached. A coil 215 is disposed on the outer peripheral side of the iron core 213
in a wound state.
[0003]
A support ring 217 is mounted on the outer peripheral side of the coil 215 and on the inner
peripheral side of the cylindrical portion 205 of the case 201. A magnet 219 is disposed on the
inner circumferential side of the support ring 217.
03-05-2019
1
[0004]
A stepped portion 221 is formed on the support ring 217, and a diaphragm 223 is placed on the
stepped portion 221. The diaphragm 223 is composed of an elastic plate 225 and a magnetic
piece 227 as an additional mass attached to a central position of the elastic plate 225. The pole
piece 214, the coil 215, the magnet 219, and the diaphragm 223 constitute an electroacoustic
transducer. In the figure, reference numeral 228 denotes an adhesive.
[0005]
Further, a pair of terminals 229 and 231 are attached to the lower side of the substrate 209 and
in the inner space of the case 201, and the pair of terminals 229 and 231 are constituted by coil
springs. On the other hand, both not-shown coil ends of the coil 215 already described are
electrically connected to the pair of terminals 229 and 231 via the substrate 209. A spring
terminal portion is constituted by the pair of terminals 229 and 231, the skirt portion 205a of
the cylindrical portion 205 of the case 201, and the like.
[0006]
The electro-acoustic transducer having the above-described configuration operates as follows.
That is, the diaphragm 223 is in a state of being attracted by the magnet 219, and thereby set
with a certain polarity. In that state, when current flows through the coil 215 through the
terminals 229 and 231, the iron core 213 is made into an electromagnet. As a result, a magnetic
field is generated at the tip. At that time, when the magnetic pole by the coil 215 generated in the
iron core 213 and the magnetic pole by the magnet 219 of the diaphragm 223 have different
polarities, the diaphragm 223 is attracted to the iron core 213.
[0007]
On the other hand, when the magnetic pole by the coil 215 generated in the iron core 213 and
the magnetic pole by the magnet 219 of the diaphragm 223 have the same polarity, the
diaphragm 223 repels the iron core 213. Therefore, by intermittently supplying a current in any
03-05-2019
2
direction, the diaphragm 223 repeats the above-described operation, and eventually the
diaphragm 223 vibrates at a predetermined frequency to generate a sound.
[0008]
By the way, the electroacoustic transducer which performs said structure and effect | action will
be internally equipped, for example in the housing of a mobile telephone. The situation is shown
in FIG. First, there is a housing 233 of a mobile phone, and the electro-acoustic transducer
already described is fixed or held by bonding, press-fitting or the like in a hole 235 formed in the
housing 233. On the other hand, there is a substrate 237 of a mobile phone, and on this
substrate 237, circuits 239 and 241 are provided. Then, by mounting the housing 233 holding
or holding the electro-acoustic transducer on the substrate 237, the electro-acoustic transducer
is mounted on the substrate 237.
[0009]
At this time, the terminals 229 and 231 formed of coil springs are in pressure contact with the
circuits 239 and 241. At this time, the terminals 229 and 231 are compressed from the free
height (L1) to the compression height (L2) shown in FIG. 8, and the terminals 229 and 231 are
compressed by the elastic return force generated at that time. It is pressed against the circuits
239, 241, thereby obtaining a reliable electrical connection. The compression height (L2) is a
height slightly larger than the contact height obtained by compressing the terminals 229 and
231 until the respective windings adhere.
[0010]
SUMMARY OF THE INVENTION The above-described conventional arrangement has the
following problems. That is, in the configuration of the above-mentioned conventional
electroacoustic transducer, there is a problem that it is difficult to achieve the reduction in
thickness. That is, as described above, in the state where the electroacoustic transducer is
mounted on the substrate 237 of the mobile phone, the terminals 229 and 231 formed of coil
springs are in the state of the compressed height (L2), but the minimum The height is necessary.
Therefore, even if it is intended to make the end of the case 201 on the side of the terminals 229
and 231, that is, the spring terminal portion thin, the above-mentioned compression height (L2)
largely affects the reduction in thickness.
03-05-2019
3
[0011]
The present invention has been made based on these points, and the object of the present
invention is to improve the structure of the terminal made of a spring to make the compression
height at the time of mounting smaller, thereby making the device thinner and thinner. An object
of the present invention is to provide an electroacoustic transducer which makes it possible to
expand the sound production part.
[0012]
In order to achieve the above object, in the electro-acoustic transducer according to claim 1 of
the present invention, the terminal is constituted by a spring, and the terminal is in pressure
contact with the substrates of various devices. In the electro-acoustic transducer to be mounted,
at least a part of the terminal is configured to be polymerized along the direction substantially
orthogonal to the elastic displacement direction at the time of pressure contact, thereby reducing
the height at the time of pressure contact. It is characterized by the fact that
The electro-acoustic transducer according to claim 2 is the electro-acoustic transducer according
to claim 1, wherein the terminal is composed of a coil spring, and changing the winding diameter
of the winding of the coil spring makes It is characterized in that the winding of the part
penetrates the inside or the outside of the other winding and is polymerized along the direction
substantially orthogonal to the elastic displacement direction.
[0013]
That is, in the case of the electro-acoustic transducer according to the present invention, in the
case where the terminal is constituted by a spring, at least a part of the spring is substantially
orthogonal to the elastic displacement direction when the spring is pressed against the substrate
of various devices It is configured to polymerize along the direction, thereby reducing the height
of the spring at the time of pressure contact. In addition, when the spring is constituted by a coil
spring, by changing the winding diameter of the winding of the coil spring, a part of the winding
enters into the inside or the outside of the other winding at the time of pressure contact and
approximately in the elastic displacement direction It is conceivable to polymerize along
orthogonal directions, thereby reducing the height of the spring at the time of pressure contact.
03-05-2019
4
[0014]
DESCRIPTION OF THE PREFERRED EMBODIMENTS The first embodiment of the present
invention will be described below with reference to FIGS. 1 to 4. FIG. First, there is a case 1,
which is composed of a top plate portion 3 and a cylindrical portion 5. A sound release hole 7 is
formed at the center position of the top plate portion 3 and the inside of the case 1 is inside. A
resonance space 8 is formed. In the case 1, a pole piece 14 having an iron core 13 attached at
the center position of the substrate 9 and the base 11 is attached. A coil 15 is disposed on the
outer peripheral side of the iron core 13 in a wound state.
[0015]
A support ring 17 is internally provided on the outer peripheral side of the coil 15 and on the
inner peripheral side of the cylindrical portion 5 of the case 1. A magnet 19 is disposed on the
inner peripheral side of the support ring 17.
[0016]
A stepped portion 21 is formed on the support ring 17, and a diaphragm 23 is placed on the
stepped portion 21. The diaphragm 23 is composed of an elastic plate 25 and a magnetic piece
27 as an additional mass attached to a central position of the elastic plate 25. The pole piece 14,
the coil 15, the magnet 19 and the diaphragm 23 constitute an electroacoustic transducer. In the
figure, reference numeral 28 denotes an adhesive.
[0017]
Further, a pair of terminals 29 and 31 are attached to the lower side of the substrate 9 and inside
the skirt portion 5a of the cylindrical portion 5 of the case 1, and the pair of terminals 29 and 31
are configured by coil springs. It is done. On the other hand, both coil ends (not shown) of the
coil 15 already described are electrically connected to the pair of terminals 29 and 31 via the
substrate 9. A spring terminal portion is constituted by the pair of terminals 29 and 31 and the
skirt portion 5 a of the cylindrical portion 5 of the case 1 and the like.
03-05-2019
5
[0018]
Describing the configuration of the terminals 29 and 31 in detail, the terminals 29 and 31 are
formed in a tapered shape whose diameter is reduced toward the lower side. Specifically, as
shown in an enlarged manner in FIG. 2, first, the upper end wound portion 29a having a
relatively large diameter for three turns from the upper end is configured, and the upper end
wound portion 29a is formed by the upper two strips. The diameter of the winding is set to a
predetermined large diameter. A tapered portion 29b is provided below the upper end wound
portion 29a. That is, the diameter of three turns (the winding at the upper end is the lowermost
winding of the upper end wound portion) constituting the taper portion 29b gradually decreases
in the downward direction as it goes downward. ing. A relatively small diameter lower end
winding portion 29c is provided below the tapered portion 29b. The diameter of each winding is
set to a predetermined small diameter for three turns of the lower end wound portion 29c.
[0019]
Further explaining the taper portion 29b, the reduction width (a) of the winding diameter is set
to a value larger than the wire diameter (d). This is because, as shown in FIG. 3, the tapered
portion 29b and the lower end wound portion 29c enter the inside of the upper end wound
portion 29a during compression, and the respective windings are superposed along the direction
orthogonal to the elastic displacement direction. In order to become With such a configuration,
the height (L1 ') in the non-mounting state shown in FIG. 2 becomes the compressed height (L2')
shown in FIG. 3 in mounting and the compressed height (L2 ') The value can be made smaller
than the conventional compressed height (L2) shown in FIG.
[0020]
Next, the electro-acoustic transducer having the above-mentioned configuration is installed, for
example, in a housing of a mobile phone. The situation is shown in FIG. First, there is a housing
33 of a mobile phone, and the electro-acoustic transducer described above is fixed or held by
bonding, press-fitting or the like in a hole 35 formed in the housing 33. On the other hand, there
is a substrate 37 of a mobile phone, and circuits 39 and 41 are provided on the substrate 37.
Then, by mounting the housing 33 holding or holding the electro-acoustic transducer on the
substrate 37, the electro-acoustic transducer is mounted on the substrate 237.
03-05-2019
6
[0021]
At this time, the terminals 29, 31 are compressed from the state as shown in FIG. 2 to the state
as shown in FIG. 3 to be the compression height (L2 '), and the compression height (L2') is It is
smaller than the conventional compression height (L2) shown in FIG.
[0022]
According to the present embodiment, the following effects can be achieved.
That is, the electro-acoustic transducer can be thinned, and it can greatly contribute to thinning
of various devices mounting such an electro-acoustic transducer, for example, a mobile phone. In
this configuration, tapered portions 29b and 31b are provided on the terminals 29 and 31
formed of coil springs, and a part of the tapered portions 29b and 31b is polymerized along a
direction orthogonal to the elastic displacement direction at the time of compression. This makes
it possible to make the compression height (L2 ') of the small value a small value, by which the
projection height of the skirt portion 5a of the cylindrical portion 5 of the case 1 also becomes
small, and to make the spring terminal portion thinner. It is because Also, by making the spring
terminal portion thinner, for example, if the thickness of the electroacoustic transducer is the
same as the conventional one, the sound producing portion can be expanded, thereby improving
the acoustic characteristics. Can be
[0023]
Next, a second embodiment of the present invention will be described with reference to FIG. In
the second embodiment, the terminals 29, 31 in the first embodiment are arranged upside down.
Even with such a configuration, the effect of reducing the compression height (L2 ') at the time of
mounting can be obtained similarly, and therefore, the same effects as in the case of the first
embodiment can be obtained. Can.
[0024]
Next, a third embodiment of the present invention will be described with reference to FIGS. 6 and
7. In the case of the first embodiment and the second embodiment, an example in which the
03-05-2019
7
terminals 29 and 31 are formed by coil springs has been described. However, the present
invention is not limited to the coil springs. The application of the present invention is also
possible in the case where the terminals 29 and 31 are configured by leaf springs as shown in
FIG.
[0025]
That is, the terminals 29 and 31 are configured by an E-shaped leaf spring 41 as shown in FIGS.
6 and 7. The leaf spring 41 is in the state shown by a solid line in FIG. 7 in a normal state, that is,
when not compressed, since the central projecting piece 41a is bent. On the other hand, at the
time of compression, it is in a state as shown by a virtual line in FIG. At this time, since the
projecting pieces 41a are inserted between the pieces 41b and 41c on both sides, they become
substantially a single plate at the time of compression, which is a very small value as the
compression height. Therefore, it is very effective in achieving thinning of the electroacoustic
transducer and thinning of the device on which the electroacoustic transducer is mounted.
[0026]
The present invention is not limited to the first to third embodiments. As the configuration of the
spring, various ones can be considered besides the illustrated one. Further, in the case of using a
coil spring, it may be arbitrarily set as to where and in what range the tapered portion is
provided. The point is that at the time of compression, a part thereof may be polymerized along
the direction orthogonal to the elastic displacement direction to reduce the compression height.
[0027]
As described above, according to the electro-acoustic transducer according to the present
invention, it is possible to make the electro-acoustic transducer thinner and various devices for
mounting such an electro-acoustic transducer, for example, It can also contribute significantly to
the thinning of mobile phones. This is because the terminal made of a spring is configured such
that when compressed, a part of the terminal is polymerized along the direction orthogonal to
the elastic displacement direction, whereby the compression height of the terminal can be made
a small value. This is because the thickness of the spring terminal can be reduced. Also, by
making the spring terminal portion thinner, for example, if the thickness of the electroacoustic
transducer is the same as the conventional one, the sound producing portion can be expanded,
03-05-2019
8
thereby improving the acoustic characteristics. Can be
03-05-2019
9
Документ
Категория
Без категории
Просмотров
0
Размер файла
18 Кб
Теги
jp2000270400
1/--страниц
Пожаловаться на содержимое документа