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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of an electromagnetic
electroacoustic transducer showing a conventional array, FIG. 2 is a plan view of FIG. 1, and FIG.
3 is a perspective view of a coil frame 4 of FIG. It is. FIG. 4 is a plan view of an electromagnetic
type electroacoustic transducer according to the present invention, and FIG. 5 is a perspective
view of the coil frame 4 of FIG. · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Plate, 2 · · · center pole, 3 · · · ·
· · · · · · · · coil frame 5a, 5b · · · · · · · · · · · · · · · ....... 9b ··········· Notches.
[Detailed description of the invention] In the present invention, in the case of electromagnetic
sound and electric sound recording, when the stone is composed of plural pieces, it is structured
to be a guide for positioning the magnet by using a coil frame About. First of all, the conventional
example will be described II 1 mb 2-1 and 3-show the conventional example-% @ 1 lil is the
conversion-short-and 1 is more than a soft magnetic material)-1 Balance 1. The center pole is
fixed on the ground 2 made of a soft magnetic material. In addition, a coil frame 4 is wound on
the plate 2 and 9 = il 3 and a magnet ha * 5b are fixed inside to form a part of the drive. On the
other hand, an upper rope iron 8 composed of a soft magnetic material 7Kt1 is fixed, with the
diaphragm 7 being supported by the supporting body 6 at a periphery thereof with a gap of a
suitable change from the space of this cocoon. FIG. 2 is a plan view of the case of FIG. 1 in which
the crucible 7 is removed. The outer periphery of the coil frame 4 is circular, showing that the
magnet 51 $ 156 is square. 纂 31! In the converter 1 having a configuration of 9 or more, which
is a perspective view of the coil frame 4, the magnets are configured with 2 鯛, and these
magnets are relative to the center of the drive unit (the center of the center ball in this example)
It is inconvenient that it is desirable to arrange in a symmetrical position, but there is no means
for this positioning, and it is inconvenient to rely on visual inspection. The object of the present
invention is to provide a means for performing this positioning, particularly when a plurality of
magnets are provided. -2- Figure 4 @ and Figure 5 show an embodiment of the present invention,
and Figure 4 is also a plain i1 iwj with the shipping board removed, and the configuration is the
conventional example. Since it is as having demonstrated by the reason which shows, it
abbreviate ¦ omits. FIG. 5FIA is a perspective view of the coil frame 4 of FIG. 4 and has a coil
frame 4Fi, an upper piece 4a and a lower piece 4h thereof, and the lower piece 4h is provided
with a notch 9α dip 9h. The notches have the same shape as the magnets 5g, 56 (D shell.
Therefore, positioning of the IF horse is performed by arranging the magnet to be held in this
notch during assembly of the transducer. As described above, according to the present invention,
in the case of a plurality of magnets S * according to the present invention, their positions can be
easily determined and contribute to the efficiency of assembly. In the present invention, various
modifications can be made within the lIIIm range. For example, even when the number of
magnets is increased to 3111 and 4 @ 4, it is possible by increasing the cutaway portion of the
coil frame. In addition, the coil frame O @ defect may be provided on the upper piece of the coil
frame or may be provided on both the upper piece and the lower piece.
− 量 Quantity rate 率-纂 51 is a case of electric am electroacoustic transducer that is not a good
example of rice, @ 2- 扛 1st-1-1, 31il 1 o o: I (le frame It is #I view 4 of 4. Fig. 4 is a trap by this
invention! ] 11 abrasive air acoustic change I! O flat-1 FIG. 5 is a coil frame 40 noble view of
knitting 4-. In each -06 item, one number shows one member. One. , Play) 2. ,, Center pool 3 °. ,
Carp k4. ,. 2-il frame Sa + 5k. -Stone 6 ... Support 7 ... Shake plate 8 °. . Top-iron 9a + 9b, ...,
notched chopsticks. Above-·〉 Agent Moe! 4A \,-/-4- Fig. 1 Fig. 2 □, Q 'b 5 α 442 Fig. 3 Fig. 4 □
25 b Fig. 5 "Scoring"-M age "--1396 on 1-1" 1) 1) j: Multi-choice Koutokame 1 Dodinishiikou / Ya
Oki Shoko Ji <'a door 6Tlj3l'; hlf '=' L ':, <? fl kang Qi ', i:: Uchimori f * Eastern V * v Ken 6 C- 菖 1
株式会社 Inc. ー 3- l ¥ i' 5 '曙 Tokyo V * v y y · 1 Letter five odd company, i4: ,, 7. i4 硼-part-6Kameido Koto-ku, Tokyo-m * No. 1 Stock Gold Co., Ltd. Second SEIKO Kinai * a 秦 饋 Ql & l ζ 3 T
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