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DESCRIPTION JPS56111593

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DESCRIPTION JPS56111593
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an example of a
conventional circuit, FIG. B is a diagram showing magnetic field line distribution of FIG. A, FIG. C
is an equivalent circuit diagram of FIG. An equivalent circuit diagram further simplifying the
diagram C, No.? Fig. A is a front view showing an example of a magnetic circuit having one
magnetic gap, Fig. B is a simplified equivalent circuit of Fig. A, Fig. 3A is a configuration of one
embodiment of the circuit of the present invention and magnetic field line distribution , FIG. 5B is
an equivalent circuit diagram of FIG. 5A, FIG. 5C is an equivalent circuit diagram further
simplifying the equivalent circuit shown in FIG. 5B, FIG. 5A is a perspective view showing the
shape of the diaphragm, FIG. 6B is a front view of the valley in which the circuit of the present
invention is applied to the speaker, and FIG. 6 is a view for explaining the operation of the
diaphragm of the speaker shown in FIG. ?????????????????????????
21b, 22a, 2 ? b + 23 & + 23bl 2 ? 8 ?, 2 ░ ? ? иии Yoke, 31, 3 ?, 33 иии Magnetic gap, 1 ? to
13 ииии Magnetic gap of one embodiment of the present invention circuit A diagram showing
magnetic flux density characteristics, {circle around (1)} to {circle over (3)} FIG. 0.6 t-10 Shibai
Circuit Chambers, long cows;
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic circuit
having two or more independent traveling magnetic air gaps, in which adjacent magnets of two
or more magnets are magnetized so as to magnetically repel each other. It is an object of the
present invention to provide a magnetic circuit which can reduce the leakage flux and thereby
increase the magnetic flux density in the magnetic gap. 1st! a (m) shows a perspective view of an
example of a conventional magnetic circuit, in the same It (graded + 11 e 12 * 1 s is a magnet, Lshaped! ??? 1a and 21b +! It is surrounded by za and "tbm23 @ (1) ///-zo 3 and 211 bK so as
to have a space part respectively, and pjJ 82 $ 3 in the magnetic field is provided between them.
The wedge-shaped yokes 21kl and 22 &, 22b and zia are fixed to each other. Magnets 11 and
12.15 are regularly magnetized in the same direction in order to simplify magnetization as
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shown in two opposing ? lid (Fig. 1), and the sighting surface thereof is from yokes 211 to
24bK. Each one is fixed. Therefore, adjacent viewing surfaces between adjacent magnets become
mutually different magnetic poles. The first regression is a diagram showing the magnetic field
line distribution of the conventional magnetic circuit. Magnetic flux ?t 1 ? 12 indicated by Ss K
* lI. ? f5 is distributed, and the leakage flux ?1 to ?14 indicated by + BIKMII in the same figure
are between the yokes as shown. They are distributed between the magnets 9M- and magnets,
respectively. Fig. 1 (C1 is an equivalent circuit diagram of the above-mentioned conventional
circuit. R?1 to R?14 correspond to leakage fluxes ?1 to ? ? 14 shown in Fig. 9 and
correspond to nine equivalent resistances, respectively Ry & i jokes 11 to 2ib equivalent
resistance @ Rmt Fiw gnett 11 ░ (2) What magnetic of each 'fell Equivalent resistance
corresponding to resistance. ??? The equivalent power supply voltage corresponding to each
magnetomotive force of Gnet 11e12m13, R?t1 to R?tS respectively, represents the equivalent
resistance corresponding to the magnetic flux ?t1 to ?tsK of the magnetic field IIIN1 to ss, as
shown in the 111th (? (0), A resistance 1 / 2R?7 having a half value of the equivalent
resistance R?7 due to a leakage flux ?7 reaching the magnet 110WaK from the negative pole
of the magnet 12 through the magnet 22W + 21b is connected in series KII each of the
equivalent resistance RByK of the magnet 11.12 i have 1 magnet NiK yo) Yoke 2M & +2! The
resistance 1 / 2R.phi. of a half value of the equivalent resistance R.phi. due to the leakage flux
.phi. leading to the aaK of the magnet 12 via b is in series # c * continued t to the resistance
value Rmf of the magnet lz 13 respectively. It will be
Similarly, the equivalent resistance R? 101 due to the flux 0 + 0 leaking from the pole of the
magnet 12 to the 8 poles of the magnet 11 (the resistance resistance R? 12 due to the flux ?
12 leaking from DM * to the magnet 1208 is 1/2 each) It is divided. Accordingly, in the
equivalent circuit shown in FIG. 1 + 01 K, the resistance @ corresponding to each of R?1 + ??8
░ (3) R?10.? ?12 is uniformly KR, and IR?t1! Assuming that R.phi.f2- "Lpt'A * R.phi.481
R.phi.-R, the equivalent serial number shown in the same figure to1 can be further simplified and
rewritten as shown in the same figure (Di shown in the figure). In the figure (n), t +, i2.1 stf
magnetic sky! ??????? ??? A test current corresponding to the magnetic flux density
flows in a circuit in which a circuit of 9 equivalent impedances 20 and a circuit of equivalent
resistance R are respectively connected in series by Km. Therefore, the magnetic gap R1 + ? ? s
Kfl equivalent current 1j, i! The equivalent current 12 flowing through the central magnetic gap
szK is 1A / 2 + 2M). Therefore, the relation of in (itxLs) holds. ????????????? The
air flux density of the central magnetic circuit unit consisting of the yoke 22m + 2zb + magnetic
air gap 32 is the air flux of the two magnetic circuit units at both ends of 0! ! From the equivalent
circuit shown in FIG. 2 (B), the equivalent current 1 flowing in the magnetism 11 of one magnetic
circuit which has a gap shown in FIG. 2 (A) & C is low. Apparently Kx7z and Shi. A relation of 1f
(ij dance 11 1 1 (4) is established. Therefore, in the conventional magnetic circuit described
above, by combining two or more magnetic circuits, the air gap magnetic flux density of each
magnetic circuit is reduced, and the air gap magnetic flux density of the magnetic circuit portion
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in the center of qlK is largely reduced. Therefore, the relative value of each air gap magnetic flux
density is 7. / I got the drawback of being balanced. The present invention removes the abovementioned drawbacks. FIG. 3 will be described with reference to the following drawings. FIG. 3
(m) is a longitudinal sectional view of one embodiment of the magnetic circuit according to the
present invention and its magnetic force line distribution in FIG. 3 (m). In FIG. 1 (the same
components as Al and (Bl In this embodiment, the description will be omitted. In this
embodiment, the magnet 12 'of the central magnetic circuit unit consisting of the magnet 12', ii22 & '' + 2211 'and the air gap, and the magnet 111s of the left and right magnetic circuit units
It is characterized in that it is magnetized to repel one. If this is shown in Fig. 1 (BIK?7.?8.?To,
casting 2 ?<conventional magnets next to each other, yoke between yokes tn 7), the leakage flux
is.
(S) It does not occur as can be seen from the ($ 1 + 1) beam, and a magnetic flux 55 'is generated
in the direction opposite to the conventional direction between # and 22a' and 22b ', and ?t2'
and 1111 'are also generated. It occurs in the opposite direction to the conventional one.
Therefore, the equivalent circuit of the magnetic circuit to be one example and three examples is
the opposite direction only to the equivalent power supply E 'corresponding to the magnet
magnetomotive force of the central air flow circuit section as shown in the third k). Magnetic flux
?7. The magnetic resistance corresponding to ?8 ░ ?Ton?, 2 is negligible. The same
reference numerals as in FIG. 1 rat denote the same parts in FIG. Fig. 3 (Because the equivalent
circuit shown in BIK does not generate leakage flux ?7.?8.?Too?12. There is also no
reluctance, so that this equivalent circuit is further simplified, and the equivalent circuit shown in
FIG. II 3 + 01 K has no resistance R as shown in # i and FIG. 1 f D). If the equivalent current
(actually corresponding to the magnetic flux density) flowing through the air gap is calculated,
the equivalent current flowing through each magnetic air 1 1 IK 11. i2. i5 are all lff1 / Z, as can
be seen from FIG. The magnetic air gap of (B) is the magnetic air of a single magnetic circuit! The
IK flowing equivalent turtle flow 1 and (@) are the same. Therefore, the reduction of the air-gap
magnetic flux vh & which has been conventionally occupied in the magnetic circuit having two or
more magnetic air gaps does not occur in this embodiment. . Fig. 4 shows the magnetic flux
density characteristics of the air gap of the present invention circuit. It is a figure which shows
the magnetic flux density characteristic of the air gap of the conventional circuit. That is, in FIG.
4, the vertical axis represents the value of the magnetic flux density of the magnetic flux ? fl +
? f 2 и ? ts of the air gap, and the horizontal axis is the distance in the longitudinal direction of
the air gap of the magnetic circuit. In the IR4 diagram, showing that # 1 has been fixed up to
KSOm per unit! 1.1.15 # i Air gap flux ?1 ++ ?12. An eight flux density of ?ts is shown, and
almost no difference in magnetic flux density is found among them, and n, n2. It was confirmed
that the magnetic flux density j [K] of the air-gap magnetic flux ?Fll?f2 + ?ts of the
conventional circuit shown by the solid line n5 is extremely high. Next, although the circuit of the
invention 0 is used for various applications, the case where it is used as a speaker will be
described as an example. FIG. S (m) is a film-like diaphragm (a jll i-direction vibrating diaphragm,
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which is mounted on the yokes 21 & 2.b as shown (b1). Here, Kullli S 5 o (AIKSa, Sb, Sc? On
diaphragm 4 + 71? A conductor is formed by photoetching or the like so that the direction 1 'CIE
fi flows.
First, the current path 5aeSb + ? ? is disposed on the magnetic gap S, 32.sB. Therefore, when
the current is directed in the direction KtIL indicated by 1 on the diaphragm 4 as shown by
emphasizing the current path in FIG. 6, for example, a force is applied upward as indicated by F
in FIG. The diaphragm 4 is vibrated to produce a sound by being energized, and the force is
applied in the direction opposite to the direction of travel R # or # iy in the reverse direction, that
is, downward. In this case, the magnetic air gaps 31. There is almost no difference between the
magnetic flux densities of -33, as shown in FIG. 4 (1)-(I3). In addition, this speaker uses a circuit
of the present invention and this speaker has an extremely small diaphragm width of 40 (for
example, (about 1, 5? f)) and is used as a tweeter. Is constructed by combining the magnetized
surface of the magnet of the magnetic circuit portion so as to magnetically repel between
adjacent magnets (?), and the occurrence of leakage flux between adjacent magnets is reduced.
Therefore, it is possible to increase the a-flux density in the air gap of a magnetic circuit of 50 ?
or more compared to the conventional circuit which magnetizes the magnet in the same
direction, and the difference between the magnetic flux densities of two or more magnetic air
gaps Application to storehouse, speaker town so that it hardly occurs. It is preferable to have
features such as Zl.
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