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Patent Office Secretary General Iku Takehisa 1 The name of the invention ■ Japanese Patent No.
48975220 published Japanese Patent No. 48. (1973) 12.12 jet / jf4 / ρ, eks? 3 / Ming # 1 JIIFL
name of the invention L name of the speaker magnetic circuit assembly method-λ 4 I # claim In
the magnetic circuit consisting of a cylindrical plate and a yoke plate to the yoke plate and the
yoke plate respectively The center of the yoke cap is provided with a positioning hole, and the
position of the hole of the yoke cap and the position of the concave groove of the yoke plate At
the bottom of the Yap, bumps for electrodeposition, starting points are constructed and s'ts the
yoke cap of the above described configuration and the magnetic tg + 1-freight 1-froth with the
correct toilet relationship VC, @ In the state, press the electrodes to the outside of the yoke cap
and the center pole to conduct electricity, and perform projection welding with the yoke cap and
the magnetic circuit. Assembling method of the speaker magnetic circuit
Speaker spear card 411 so-called 47029751 [F] 1 Japan Patent Office
In the case of an electrodynamic speaker, increasing the magnetic flux density R of the moving
magnetic gap of the voice coil increases the efficiency of the speaker. Because it became a
member who became a good member, the magnetic 1aIIII of the electrodynamic speaker from
South America. ? 41 & c As permanent magnet used, the price is acceptable. The large size is
adopted and it is 6 years old. The permanent magnet used for Kgi in the magnetic circuit of the
electrodynamic speaker is roughly classified into a cast type t and a 7 elite magnet, but in recent
years the price image has been used to a 7 elite magnet for i Many i can be. By the way, the
magnetism -wk of the speaker in the case of using a ferrite magnet is t in a configuration form in
which a cylindrical ferrite magnet is surrounded by the outside 111 of the center pole as shown
in FIG. From the outside, while being stunned, a large @ leakage flux f? Diverge. EndPage: 1, ie, a
speaker shown in vertical WR view in FIG. 181, 1 is cone howing, 2 is a moving plate, 3 is a voice
coil bobbin, 4 is a center retainer, 5 is a) y 72 ray), 6 n cylindrical ferrite magnet, f is center pole,
8 y yoke grate, 6 m for speaker magnetic circuit; On the other hand, because it is 0% formed by
bonding together with the magnet 2 and the ferrite magnet 6 and the ferrite magnet 6 and the
Kg − / gray 8 with the adhesive, the center pole and the top plate δ The cabinet is composed of
nine airspace! Leakage flux from I) ylfv-) a # C-attached iJf cone housing lK flow lower cone ・
generate a magnetic field of considerable strength around cone ・ House of magnet g & circuit
Not a little I11 leakage flux has occurred. Matomo, in the speaker with the structure as shown in
the first illustration above-cone, housing 1 and top Great 5 Il! When iron powder generated by
electric sparking during electrodeposition of copper becomes tog play: 6 and center pole 1-there
may be many accidents like this. Furthermore, it was electrodeposited on the cone and housing 1
Ferrite magnet 6 adhered using adhesive to top grate 6 and blaing adhered to ferrite magnet 6
using adhesive-High frequency heating for forced drying of adhesive for magnetic path
consisting of frugate 8 etc. If the award for the award is-in degrees, the thickness of the first
thick plate-1: 1-n housing 1 is easily heated and the thermal efficiency is low, and in some cases
the cone housing l in 10,000 In order to dry in the condition that the cone housing lt is attached,
the problem such as 9 which caused the phenomenon of the plating burnout 6 タ, the #C casing,
When drying, there were many places or need, etc. There was 1 fiLf & there was a part-Television
reception II! As a speaker to be used in the coffin, there is a need to use a mineral 1 as a speaker
to be used with a small amount of repulsive magnetic flux, and a color television to a t L%. In the
case of a receiver, the presence of the leakage flux causes distortion and color shift t again in the
8: 1 lii, so the magnetic Ig circuit with the structure as shown in the al1 diagram. tJ11-The
speaker is 11 i by adopting it at all. And, as in the case 11 where the color television receiver Jmachine tends to be miniaturized more and more recently, the butterfly speaker and the picture
tube can not be avoided from being placed close to each other, so that it is possible In particular,
the speaker force to be used is smaller than that required for a low leakage flux. The present
invention provides an assembling method of a speaker magnetic 1gl path for obtaining a low ztn
speaker of a leakage flux which can be incorporated without any problem even in a miniaturized
color television receiver. Figure 2 is a vertical cross-sectional view of a speaker made according
to the present invention, 6 in which I is a cone ハ ウ ジ ン グ housing and 9 is a yoke cap. . : Y
The magnetism 1g1M6 which consists of the elite magnet 6, the caustic fugrate, 8 and the center
pole 7 etc, the vibration system which consists of the diaphragm 2, the voice coil thIgIt, the
bobbin 3 and the center retainer 4 etc is a scene together -It is contained in a monotonous space
by ^-housing 1 and the eye-cap 9. FIG. 3 is a plan view of the bottom of the yoke great 8 and FIG.
It is a longitudinal cross-sectional view of a yoke great 8 and a ball caustic in the moom line
position WCsp in the middle. As is apparent from the figures 3 and 4, the bottom surface of the
caustic-fugrate 8 is provided with a concave groove 8a for positioning at its center position ffi,
and the above-mentioned concave groove- In the outer side, there is provided an annular
projection 8b of which the height is not less than 2 LdJA and which is larger than the required
height. わ55. C yo 21 horni, 8 force 1 stuck. るヨー。 As shown in the plan view of FIG. 6 and
the vertical cross-sectional view of FIG. 9, and the position of the hole 9a of the yoke cap 9 and
the position of the concave ridge of the yoke grate 8 and i? As shown in FIG. 1, at a plurality of
locations on the bottom surface of the blasting Yap 9 in contact with the annular projection 8b of
the seek plate 8 in a state where they are matched by the Getro member 10 made of an
insulation material. Protruding points 9b for electrodeposition, 9),...
FIG. 6 is a longitudinal sectional view rIIi of a part of the yoke cap 9 and EndPage: 2 shows a plan
view of a part of the yoke cap 9 with a longitudinal cross section at the position OB-B @ in FIG. It
is shown. Well, the concave groove for positioning in the bottom surface-2i-like protrusion 8b11!
: The composition is composed of -Future 8 and 7 Eli. . ッ、6□1. A magnetic 1 g circuit of a
speaker formed by attaching i to C-4, 1 to 1 and 2 to each other. First, the position of the concave
# 8a for positioning the yoke plate 8 and the position of the hole of the eye cap 9 are fixed to the
t-yoke cap 9 by the guide member 10 made of an insulator. In order to coincide with each other,
the magnet is placed on the bottom of the yoke grade 8 on the bottom of the "I-capped cap", and
then the current is applied between the electrodes 12, 15 respectively pressed against the pole
bead and the yoke cap 9 outside. Thus, the yoke cap 9 and the magnetic circuit of the speaker
are dissolved in the plurality of projections protruding on the bottom of the yoke i yag 9 and the
annular projection 5 bcP of @ 9 b, 9 boky-1 gray 8-8. Integrally: Fix it. In the direction to
suppress the cushioning member 11 (for example, the rubber cushion 11) which is the abovementioned yc magnetism I [1 N road and yoke cap 9 members 10 (for example, Bakelite guide
member 10) is an elastic body]. While moving, the presence of the guide member 10 described
above does not interfere with the welding operation t ′ ′ i. As described above, the magnetic
circuit and the eye-cap are simply combined by the guide member 10 with the concave # 8 for
positioning the yoke plate 8 and the hole 9a of the yoke cap 9, ,-Cuc 9'a? 5 璽 -froth 8 with an
annular projection 8b. The protruding points 9m) for electrodeposition of the yoke cap 9 and 91)
are made to be in the correct relative positions so that they can be properly abutted, and the
electrodeposition between the two is extremely easy. Fig. 2 is an explanatory view of a relative
aspect s relative to one another during the electrodeposition operation of the magnetic circuit
and 1-even midway turn 9; Fig. 2 is obtained by applying the present invention It is a
longitudinal cross-sectional view of the finished product of a speaker. 2 in FIG. 2, since a plurality
of protruding points in the soda cap 9 are dissolved in the yoke plate 80 stacking projection
8klcp at the time of electrodeposition, the bottom surface of the yoke 9 and yoke yoke 9 In the 1
& 8 of the 8th, it is constructed facing the 1i1rL2 while facing the height of the i. A sufficient gap
m is also formed between the yoke @ and the @ wall of the yag 9 so that the type of leakage flux
flowing from the magnetic circuit to the cone housing 1 and the blind cap 9 is conventionally It is
worn less than the speakers in the format.
If the experiment O1m 寸 法, the gap h1 is 1y1j1 or more, and the function l1h2 is 2w′J2, the
magnetic 1gl path leads to the cone howe? The magnetic flux 'It was able to be reduced to a level
that could be a problem in practical use. Figure 8 (a), cb> # <a5 shows an example of the actual
distribution of the leakage flux flowing from the magnetic circuit in the speaker to the cone
housing in the s = structure IR type 1i11 O, showing in the nose diagram A numerical value 竪 is
displayed 11 (in single order gauss) of the magnetic flux at each point. なお、1f! The 81m
(IL) figure shows the distribution of the leakage flux of the conventional housing KJP in Fig. 1 = t6), and the figure 8 (1) figure shows a close contact between the yoke cap and the flange 7
Shows the distribution of ms flux in the cone housing through the speaker in the condition and
the condition done! t so 69, 8th to 8) is the figure 'toku' flat yag and yoke greatt, but yoke plate.
While configuring with the height of the fcjj-like projections! Fig. 7 shows the distribution of the
magnetic flux leakage of the cone housing over the loudspeaker in the form of the second
embodiment shown in Fig. 2 which is made in the form of I-biting and facing IIQ. '. Like a speaker
made using this, the replay of the magnetic circuit against Yatsu 1 in the yoke)! If it is% of the
configuration in the floating state, it is possible to reduce or eliminate the leakage flux flowing
from the magnetic Lg circuit to the cone housing. 4) In the method of assembling the speaker
magnetic circuit of the present invention, the magnetic l! Since the fixation of 1116 is performed
at EndPage: 3 at a portion separated from the magnetic gap between the center pole and the dog
□ grate, the # powder due to the electric spark generated at the time of electrodeposition is
inserted into m air space-9 Accident t-cause to cause a defect etc.% -1 lPfIA. Well, this, JJ! Yg and
Yo in Yoke to KsP. Since the electrodeposition line with the quartz, as shown in Fig. 1, is carried
out by pressing the electrode to the sensor and clamp cap, the speaker's magnetic filQl path is
assembled first and completed. It is possible to deposit an electrode on a magnetic circuit t-sodaclad. Therefore, in the drying of the magnetic circuit, M4 occurs as it has been a problem with
the conventional speaker described above. As described above, it is apparent that the speaker
magnetic circuit assembling method of the present invention is superior to conventional speakers
in the assembly method of the speaker magnetic circuit of the present invention.
The industrial effect is ignition because it becomes possible to provide divalent #C. Brief
description of this drawing @: # I1 is a longitudinal sectional view of a conventional type
loudspeaker, Fig. 2 is a longitudinal sectional view of a loudspeaker made according to the
assembling method of the Q loudspeaker magnetic coil of the present invention, ga A plan view
of the bottom of the Ca-li-rt in the figure, Jl! The diagram is a longitudinal cross-sectional view of
the mums line device in the Mrs diagram, the plan view of a part of the yoke yon Young in the
weir 6, the longitudinal sectional view at the line B-B in the weir 6 figure, Fig. 7 illustrates a
magnetic 1gl path and yaw; an explanatory diagram of relative relation M-like parts during
electrodeposition work with a cap; Fig. 8 l5 (a) to (0) illustrates leakage flux in various types of
speakers 11 that shows a numerical example of It is clear. l・・コーン・ハウジング、2・・
l! Moving plate, 311 ボ イ ス voice coil bobbin, No. ... center holder, 60 top plate, 60 ferrite
magnet, 1 · · · sensor pole, 8 · · cao plate · 9 · · cag cag, 10 · · · guide member, ll · Cushion member ·
· 8a 0 concave groove, ab · annular projection, 9 · · · hole, 91) · · · · · · · · · Patent applicant
applicant Victor Co., Ltd.
· 人 孝 Page EndPage: 4 < a> (b) 'tc)-晃 8) Inventors other than awJ,
patent applicant Also an agent 1t, □-key company 嘔 name ff7EndPage: 5
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