close

Вход

Забыли?

вход по аккаунту

?

JPH07250394

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 JPH07250394
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
loudspeaker and a method of assembling a loudspeaker suitable for use in a coaxial two-way
loudspeaker, and more particularly to a method of assembling a loudspeaker which is compact
and easy to assemble.
[0002]
2. Description of the Related Art A two-way speaker as disclosed in Japanese Utility Model
Application Laid-Open No. 59-104694 in which a low-mid tone speaker and a high-tone speaker
are coaxial is known.
[0003]
The configuration of the two-way speaker disclosed in this publication will be briefly described
with reference to FIG.
In the figure, 1 indicates a two-way speaker for low and medium sound and high sound as a
whole, and 2 is a lower plate and is formed substantially in a disk shape with a plate material. A
second magnet 8 is formed in a ring shape of ferrite or the like, and a flange portion 6B of a
bottomed cylindrical yoke 6 having a cylindrical portion 6A and a flange portion 6B is mounted
on the upper surface of the second magnet 8 Let One end of the cylindrical portion 6A of the
01-05-2019
1
yoke 6 is a closed bottom (upper end) 6C, and a center hole 6D is formed at the center of the
bottom 6C. The other of the cylindrical portion 6A is formed into an outwardly extending annular
flange portion 6B, and the upper surface of the flange portion 6B is in contact with the bottom
surface of the first magnet 3 having substantially the same structure as the second magnet. The
lower surface of the portion 6B is in contact with the upper surface of the second magnet 8. The
second magnet is disposed to be placed on the lower plate 2. Furthermore, a center pole 7
planted at the center position of the lower plate 2 is inserted into a center hole 6D bored in the
bottom 6C of the yoke 6 through a predetermined gap. Furthermore, an upper plate 4 made of
pure iron or the like having a central hole 5 is fixed to the upper surface of the first magnet 3.
[0004]
Therefore, a first magnetic circuit is constituted by the first magnet along the outer periphery of
the cylindrical portion 6A of the yoke 6 and the upper plate 4, and the bottomed cylindrical yoke
6 having the flange portion 6B, the lower plate 2 and the center pole 7 And the second magnet 8
constitutes a second magnetic circuit. Reference numeral 9 denotes a cylindrical casing for
integrating the first and second magnetic circuits.
[0005]
In the first gap 10 constituting the first magnetic circuit and the second gap 11 constituting the
second magnetic circuit, the voice coil 12 for low to middle sound and the voice coil 13 for high
sound are movable in the vertical direction. A low-midtone cone 18 and a high-tone cone 19 are
disposed between the frames 16 and 17 and the low-mid tone voice coil 12 and the high-tone
voice coil 13 while being held by the dampers 14 and 15 on the frames 16 and 17 A coaxial twoway speaker is configured.
[0006]
SUMMARY OF THE INVENTION In the configuration of the coaxial two-way speaker described in
the above-described conventional configuration, the yoke at the lower end of the first ringshaped magnet 3 when configuring the first and second magnetic circuits. It is necessary to
arrange the flange portion 6B of No. 6, and to arrange the second ring-like magnet 8 similarly to
the lower end of the flange portion 6B.
Therefore, not only the height H of the casing surrounding the magnetic circuit is increased, but
01-05-2019
2
also the first and second magnets 3 and 8 have the same size and weight, and the entire speaker
becomes large.
[0007]
In addition, the yoke 6 constituting the second magnetic circuit must have a bottomed cylindrical
shape having a flange portion 6B, and the center hole 6D must be processed in the bottom
portion 6C, so that the structure becomes complicated. was there.
[0008]
Furthermore, the second magnet 8 is fixed on the lower plate 2 also in the speaker assembly
process, and then the flange portion 6B of the bottomed cylindrical yoke 6 having the flange
portion is mounted on the second magnet 8 In order to determine the gap 10 of the first magnet
circuit after disposing the first magnet 3 on the flange portion 6B, the eccentricity of the yoke 6
constituting the second magnetic circuit is the first In the adjustment of the first gap 10, the
upper plate 4 has to be adjusted through the first magnet 3 and there is a problem that the
adjustment is difficult. .
[0009]
SUMMARY OF THE INVENTION The present invention provides a speaker and a method of
assembling the speaker that solves the problems of overhead, and the object of the present
invention is to simplify the configuration by making the yoke forming the second magnetic
circuit also serve as a center pole. It is an object of the present invention to provide a coaxial twoway speaker which is reduced in size and weight as a whole by reducing the magnetic circuit
height H.
[0010]
Another object of the present invention is to simplify the assembly of the magnetic circuit so that
the influence of the second magnet after the gap forming process of the first magnetic circuit
does not affect the gap forming process of the second magnetic circuit. Another object of the
present invention is to provide a method of assembling a speaker.
[0011]
SUMMARY OF THE INVENTION The speaker of the present invention is a second embodiment of
the present invention which comprises a pole combined yoke 20 at the center pole
corresponding portion formed by the first magnetic circuit 25 as shown in FIG. The magnetic
circuit 26 is formed concentrically.
01-05-2019
3
[0012]
The method of assembling the first speaker of the present invention is, as an example of which is
shown in FIG. 2, a magnet 3 disposed outside the lower plate 2 and a first member disposed
inside the magnet 3. A step of assembling a first member having a space portion corresponding
to a center pole constituting the magnetic circuit 25 and a cylindrical pole also serving as a
cylindrical pole via a first gap gauge 27 fitted in the center hole 5 of the upper plate 4 A step of
forming the first magnetic circuit 25 by inserting the yoke 20 into the space portion
corresponding to the center pole and fixing it to the upper surface of the lower plate 2 and
removing the first gap gauge 27, and the second gap The center pole 7 to which the bottom
surface of the second magnet 8 is fixed is fitted to the inner periphery of the gauge 28, and
inserted into the second gap gauge 28 so that the outer periphery is in contact with the inner
periphery of the cylindrical pole combined yoke 20 , Pole combined yoke 20 Forming the second
magnetic circuit 26 by removing the second gap gauge 28 after fixing the second magnet 8 to
the upper surface of the lower plate 2 or the lower plate 2, the first and second magnetic circuits
25 and And voice coils 12 and 13 intervene in the first and second gap portions 30 and 31,
respectively, and the low and mid-tone cone 18 and the high-tone cone 19 are disposed on the
voice coils 12 and 13, respectively. The
[0013]
The second method of assembling the speaker according to the present invention is, as shown in
FIG. 4, an example of which is shown in FIG. 4, a magnet 3 disposed outside the lower plate 2 and
a first magnet provided inside the magnet 3. Assembling a first member having a space portion
to be a center pole corresponding portion constituting the circuit 25, and forming a tubular
through a first gauge portion 32A of a gap gauge 32 fitted in the center hole 5 of the upper plate
By fitting the pole combined yoke 20 and fitting the second magnet 8 fixed to the center pole 7
via the second gap gauge portion 2B provided in the inner periphery of the cylindrical pole
combined yoke 20 The first and second magnetic circuits 25 and 26 are simultaneously
configured by inserting into the space portion corresponding to the center pole, fixing at least
the pole and yoke 20 to the upper surface of the lower plate 4 and removing the gap gauge 32.
The voice coils 12 and 13 intervene in the first and second gap portions 30 and 31 of the first
and second magnetic circuits 25 and 26, respectively. 18 and a step of disposing the high-tone
cone 19.
[0014]
Since the present invention is disposed concentrically with the second magnetic circuit 26 in the
center pole corresponding portion formed by the first magnetic circuit 25, there is no need to
stack the first and second magnets 3 and 8. It is possible to obtain a compact and lightweight
01-05-2019
4
coaxial two-way speaker.
[0015]
In the present invention, the pole combination yoke 6 is inserted and fixed to the space portion
of the center pole corresponding portion forming the first magnetic circuit 25 via the first gap
gauge 27 and then the pole combination is performed using the second gap gauge 28. Since the
second magnetic circuit 26 is formed by interposing the center pole 7 and the magnet 8 in the
yoke 20, it is possible to obtain a loudspeaker assembly method that is easy to assemble and
form a gap.
[0016]
According to the present invention, since the pole-combined yoke, in which the second magnetic
circuit 26 is incorporated in advance, is inserted and fixed in the space of the center pole
corresponding portion for forming the first magnetic circuit 25 using a gap gauge. Thus, it is
possible to obtain a speaker assembly method that facilitates gap formation.
[0017]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A loudspeaker and a method of
assembling the loudspeaker according to the present invention will be described below with
reference to FIGS.
In this example, a two-way speaker in which the low-mid tone speaker and the high-tone speaker
are simultaneously coaxially configured will be described in detail.
The parts corresponding to those of the two-way speaker shown in FIG. 5 are denoted by the
same reference numerals.
[0018]
FIG. 1 is a side sectional view taken along the diametrical direction passing through the center of
the opening as viewed from the top of the two-way speaker of this embodiment, and FIG. 2 is an
assembly explanatory view of a magnetic circuit used for this speaker.
01-05-2019
5
First, the assembly process of the magnetic circuit will be mainly described with reference to FIG.
[0019]
In FIG. 2A, 2 is a lower plate of the magnetic circuit of the speaker in which a plate material such
as pure iron is formed in a disk shape.
An unmagnetized first magnet 3 having a ring-shaped space 3A formed of a magnet material
such as ferrite is fixed to the upper side of the lower plate 2 with an adhesive 34 so as to fix the
first magnetic circuit 25. An assembly member is obtained in which a space portion 3A which is a
center pole corresponding portion to be formed is formed.
[0020]
Next, a first gap gauge 27 made of a predetermined metal is prepared.
The first gap gauge 27 is provided with a grip portion 27A at the upper part, and a gauge portion
27B for holding a pole and yoke provided with a recess 27D formed on the lower surface to be
fitted with the outer diameter of the pole and yoke 20 The holding width W of the gauge portion
27B defines the gap width of the voice coil of the first magnetic circuit 25.
[0021]
The outer peripheral portion of the holding gauge portion 27B is formed to fit with the central
hole 5 formed at the center of the upper plate 4, and the center of the first gap gauge 27
penetrates from the upper surface to the recess 27D. A hole 27C is bored, and in the present
embodiment, which is an object to be adsorbed, via the through hole 27C, the pole and yoke 20
is adsorbed and held in the gauge portion 27B by a vacuum adsorption device or the like.
[0022]
01-05-2019
6
The upper plate 4 is formed of a plate material such as pure iron in a disk shape, and a central
hole 5 having a relatively large diameter is bored at the center.
The upper plate 4 is bonded in advance to the upper surface of the first magnet 3 with an
adhesive 34 or the like, or is fitted and held in the outer diameter portion of the holding gauge
portion 27B of the first gap gauge 27 The combined use yoke 20 is attracted and held in the
recess 27D of the holding gauge portion 27B.
[0023]
The pole and combined yoke 20 is also formed in a bottomed cylindrical shape in which a
column is seated with pure iron or the like.
The adhesive 34 is applied to the back surface of the bottom of the pole combination yoke 20
with the counterbore surface of the pole combination yoke 20 upward, and is held by suction in
the recess 27 D of the first gap gauge 27.
[0024]
Next, the outer diameter of the first gap gauge 27 is loosely fitted in the center hole 5 of the
upper plate 4, and the pole and yoke 20 is pushed into the space 3A as shown by arrow D in FIG.
Join at the center position of the upper surface of 2.
Alternatively, with the combined pole yoke 20 and the upper plate 4 integrated with the first gap
gauge 27, the bottom back surface of the combined pole yoke 20 is joined to the upper surface
center of the lower plate 2 and the lower surface of the upper plate 4 is The upper surface of the
magnet 3 may be bonded via an adhesive 34 or the like.
For this purpose, an arrow D is shown in the space portion 3A of the assembly member in which
the first gap gauge 27 in which the pole combined yoke 20 and the upper plate 4 are sandwiched
and fitted is shown in FIG. Lower each member as shown in the figure below.
01-05-2019
7
[0025]
With the pole combined yoke 20 and the upper plate 4 completely fixed, stop the suction
operation of the first gap gauge 27 as shown in FIG. An assembly member in which the pole and
yoke 20 is fixed to the space portion 3A of the center pole corresponding portion of the upper
and lower plates 4 and 2 and the first magnet 3 constituting the first magnetic circuit 25 is
configured as shown in FIG. .
Here, the ring-shaped space formed between the outer diameter portion of the pole and yoke 20
and the center hole 5 of the upper plate 4 becomes a first gap 30 for inserting the first low /
medium sound voice coil. .
[0026]
Next, a second gap gauge is prepared to constitute the second magnetic circuit 26 of the hightone speaker.
The second gap gauge 28 has substantially the same configuration as the first gap gauge 27
described above, and as shown in FIG. 2C, a grip portion 28A is provided on the upper portion,
and the center with the second magnet 8 is provided on the lower surface. A gauge portion 28B
for gripping the center pole 7 provided with a recess 28D adapted to be fitted to the pole 7 is
formed, and the grip width W1 of the gauge portion 28B is inserted into the voice coil of the
second magnetic circuit 26. We set the gap width
[0027]
The outer peripheral portion of the grip gauge portion 28B is adapted to be fitted with the inner
diameter of a counterbore bored at the center of the pole yoke 20, and penetrates from the
upper surface to the recess 28C at the center of the second gap gauge 28. A through hole 28C is
bored, and the center pole 7 to which the second magnet 8 as an object to be adsorbed is fixed is
adsorbed and held in the recess 28D in the gauge 27B through the through hole 28C.
[0028]
01-05-2019
8
On the upper surface of a columnar non-magnetized second magnet 8 made of ferrite or the like,
a center pole 7 made of disc-shaped pure iron or the like is fixed.
The outer diameter of the center pole 7 is loosely fitted to the inner diameter of the recess 28D
of the second gap gauge 28.
[0029]
In the present embodiment, the second gap gauge 28 is held by suction as shown in FIG. 2C in
the counterbore of the pole combined yoke 20 in which the first magnetic circuit 25 shown in
FIG. 2B is formed as described above. In order to insert the center pole 7 with magnet in the
direction D, the bottom surface of the second magnet 8 is joined to the top of the bottom surface
of the counterbore of the pole combined yoke 20 with an adhesive or the like.
[0030]
If the second magnet 8 is fixed to the bottom of the counterbore of the pole and yoke 20, as
shown in FIG. 2D, the second gap gauge 28 is moved upward in the direction of arrow U to
extract the high-pitched speaker The second magnetic circuit 26 is formed in the pole combined
yoke 20.
That is, the ring-shaped air gap formed between the outer diameter of the center pole 7 and the
inner diameter of the bottomed cylindrical pole-combined yoke 20 having a U-shaped cross
section is used for high noise of the second magnetic circuit 26. A gap 31 is formed in which the
voice coil of the speaker is inserted.
[0031]
Next, as shown in FIG. 2E, the frame 16 formed in a funnel shape with steel or the like is fixed to
the upper surface of the upper plate 4 to complete the assembly process of the metal component
of the magnetic circuit. Of course, such a frame can also be configured to end the assembly
process of the metal component of the magnetic circuit in the process shown in FIGS.
01-05-2019
9
[0032]
Next, when the assembly of the first and second magnetic circuits is completed, the process for
assembling the low-midtone speaker and the high-tone speaker is started. First, in order to
constitute the low to middle sound speaker of the first magnetic circuit 25, the first voice coil 12
in which a coil is wound around a cylindrical bobbin as shown in FIG. 1 in the first gap 30 is
voiced. The first voice coil 12 is held through the first damper 14 between the outer diameter of
the first voice coil 12 and the frame 16 or the upper plate 4 through the coil spacer (not shown).
[0033]
Next, the center hole of the funnel-like low-medium tone cone 18 with an edge 21 made of paper
etc. is joined to the upper end of the first voice coil 12, and the maximum diameter portion of the
low-tone cone 18 Are fixed to the upper opening peripheral portion of the frame 16 via the
arrows 23 to assemble a low to mid-tone speaker. By thus removing the voice coil spacer when
the first damper 14 and the first cone 18 are completely fixed, the first voice coil 12 is held so as
to be able to vibrate up and down in the first gap 30. Ru.
[0034]
Next, a second voice coil 13 in which a coil is wound around a high frequency cylindrical bobbin
for assembling a high frequency speaker is combined with a voice coil spacer (not shown) to
form a second magnetic circuit 26. Insert in the gap 31.
[0035]
Next, the second damper 15 is interposed and fixed between the inner diameter of the second
voice coil 13 and the upper surface of the center pole 7 so that the second voice coil 13 is held in
the second gap 31.
[0036]
Next, after drying, the voice coil spacer is removed.
Next, a second cone 19 for high sound with a funnel shape and an edge 22 is attached to the
01-05-2019
10
upper end of the second voice coil 13 and the inner peripheral side of the low to middle sound
cone paper 18, and the dust cap 24 is The coaxial two-way speaker is completed as shown in FIG.
The cone 19 may be a dome-shaped diaphragm or an edgeless subcone or the like.
[0037]
In the present invention, the first and second magnets are simultaneously magnetized as shown
in FIG. 1 when the speaker is assembled in this manner. In this way, the speaker can be
assembled without being affected by the magnetic flux of the magnet in the process of inserting
the voice coils 12 and 13 into the first and second gaps 30 and 31 and pasting the cone. . Of
course, the magnets 1 and 2 may be simultaneously magnetized after the completion of the
magnetic circuit shown in FIG.
[0038]
In the above-described coaxial type two-way speaker, the pole combined yoke 20 has been
described as having a U-shaped cross section with a bottomed cylinder. However, as shown in
FIG. You may make it like. That is, in this example, it is only necessary to form a cylinder made of
pure iron or the like, and in this case, the bottom of the second magnet 8 of the second magnetic
circuit 26 is directly joined to the top of the lower plate 2. Therefore, the magnetic path of the
second magnetic circuit 26 is shared by the central portion of the lower plate. In this
configuration, the pole and yoke 20A has a simpler configuration.
[0039]
Furthermore, another assembling method different from the assembling method of the speaker
described in FIGS. 2A to E will be described in FIGS. 4A and 4B. In FIGS. 2A to 2E, the coaxial twoway speaker is assembled using the first and second gap gauges, but in FIGS. 4A and 4B, the first
and second magnetic circuits using the single gap gauge 32. 25 and 26 were assembled at the
same time.
01-05-2019
11
[0040]
In this case, a gap gauge 32 as shown in FIG. 4A is used as a method of assembling the speaker.
That is, the gap gauge 32 has substantially the same structure as the first and second gap gauges
described above, and the grip portion 32A is provided on the upper portion, and the center pole
7 with the second magnet 8 is engaged on the lower surface. The second gauge portion 32B for
holding the center pole provided with the recessed portion 32D configured to hold the first and
second gauge portions 32B for holding the second gauge portion 32B together with the second
gauge portion 32B has the second gauge portion 32B. The holding widths W and W1 of the first
and second gauge portions 32A and 32B define the gap width in which the voice coil of the first
and second magnetic circuits 25 and 26 is inserted.
[0041]
The inner peripheral portion of the first gauge portion 32A for clamping is fitted with the outer
diameter of the pole and yoke 20 and the outer peripheral portion is fitted with the central hole
5 formed in the central portion of the upper plate 4 It is made to do. The outer periphery of the
second gauge portion 32B is fitted with the inner diameter of the counterbore bored at the center
of the pole-combined yoke 20, and the above-mentioned fixed center of the second magnet 8 is
fixed to the inner diameter of the second gauge portion 32B. The pole 7 is adapted to be fitted.
Further, at the center of the gap gauge 32, a through hole 32C penetrating from the upper
surface to the concave portion 32D and a branch passage 32E communicating with the through
hole 32C for adsorbing the pole combination yoke 20 are formed. The center pole 7 to which the
second magnet 8 as an object to be adsorbed is fixed and the yoke 20 serving as a pole are held
by suction with a vacuum suction device or the like.
[0042]
The gap gauge 32 as described above is used in the loudspeaker assembling method of this
embodiment. The cross section of the first gauge portion 32A of the gap gauge 32 is as shown in
FIG. 4A in the space portion 3A corresponding to the center pole of the member integrating the
first magnet 3 and the lower plate 2 as described in FIG. 2A. While holding the substantially Ushaped pole combined yoke 20 and holding the center pole 7 with the second magnet 8 fixed to
the lower end in the recess 32D in the second gauge portion 32B, the vacuum suction device is
operated The pole combination yoke 20 and the second center pole with magnet 8 and 8 are
held by suction and lowered in the direction of arrow D, and the back surface of the bottom of
01-05-2019
12
the pole combination yoke 20 and the upper surface of the lower plate 2 are bonded Glue it.
[0043]
At this time, for example, when the upper plate 4 with the frame 16 is adhered to the upper
surface of the first magnet 4, the gap gauge 32 is inserted into the space 3A together with the
above-mentioned attracted member through the center hole 5 of the upper plate 4. Make it fixed.
[0044]
Also, as shown in FIG. 4A, the framed upper plate (or only the upper plate without the frame 16)
4 is fitted to the outer diameter of the gap gauge 32 (for this reason the outer diameter of the
gap gauge 32 is 4A, the gap gauge 32 and the member to be attracted are lowered in the
direction D so that the pole and yoke 20 is fixed to the upper surface of the lower plate 2 and the
lower surface of the upper plate 4 is After adhering to the upper surface of the first magnet 3,
stopping the suction operation of the gap gauge 32 and moving the gap gauge 32 upward as
shown in FIG. 4B includes the first and second metal members. Since the assembly of the
magnetic circuit is completed, the voice coil for low and middle tone and the voice coil for high
tone are inserted into the gaps 30 and 31 of the first and second magnetic circuits, respectively,
and the low / mid tone It can be obtained coaxial two-way speaker by performing the application
of the cone and tweeter cones.
[0045]
According to such an assembling method, the assembling efficiency at the time of assembling the
speaker is further improved, and a method of assembling the speaker suitable for mass
production can be obtained.
[0046]
The speaker and the method of assembling the speaker according to the present invention are
constructed and assembled as described above, so that the magnetic circuit for the two-way
speaker can be made common, and a compact and lightweight coaxial two-way speaker can be
obtained. Thus, a speaker having an extremely simple structure can be obtained.
[0047]
Furthermore, the speaker assembly method is simple, and the speaker assembly method is made
such that the influence of the second magnet after the gap formation step of the first magnetic
circuit does not affect the gap formation step of the second magnetic circuit. Be
01-05-2019
13
[0048]
According to the present invention, the yoke constituting the second magnetic circuit is also used
as a center pole to make a simple structure, the height H of the magnetic circuit is reduced, and
the overall size is reduced and the weight is reduced. A two-way coaxial speaker can be obtained.
[0049]
According to the present invention, the assembly of the magnetic circuit is simple, and the
influence of the second magnet after the gap forming process of the first magnetic circuit does
not affect the gap forming process of the second magnetic circuit. A method of assembling a
speaker is obtained.
01-05-2019
14
Документ
Категория
Без категории
Просмотров
0
Размер файла
25 Кб
Теги
jph07250394
1/--страниц
Пожаловаться на содержимое документа