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JPS5590991

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complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPS5590991
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 и и и и и и Schematic diagram of the electromagnetic
buzzer, и и и и и и и и и current diaphragm structure, Figure 3 и и и и и и и movable iron piece of the
present invention . a иииииииииииииииииииииииииииииииииииииииииииииииииииииииии иии Fig. 4 и и и A diaphragm tank using the
movable iron piece of the present invention.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an
electromagnetic buzzer structure for an electronic watch, particularly to a movable iron piece
which is a component of a diaphragm. In recent years, development of a buzzer for a small
electronic watch is required with the small size of the electronic shutter. It has been done. A
schematic view of a watch electromagnetic buzzer is shown in FIG. Here, 1 is a diaphragm, 2 is a
coil, 3 is a magnetic core, 4 is a frame, and 5 is a magnet. If you pay attention to the diaphragm
in this, all! As shown in FIG. 2, the diaphragm 6 and the movable iron piece 7 are formed, and
both @ are fixed by welding or the like. The elastic behavior of the steel wire portion (a / -bL) in
the figure in which the diaphragm is placed in the position 1- / heavily with the diaphragm is
suppressed and the elastic imaging motion is indicated by ? as in the case of the movable iron
piece having a flat plate shape The remaining outer peripheral portion (a-a ', b-b') K is limited,
and eventually this one portion becomes a spring in the case where the imaging plate is replaced
with an imaging system with one degree of freedom. The movable iron piece corresponds to the
mass. The natural frequency f of the imaging plate is given by "No (1) 2?m where this structure
all shooting motion & diameter и и и и If applied, the width of the moving plate is reduced due to
the reduction of the width of the moving plate, the order number ? to hold the formula ( 11 k is
small and m can not be dog free. As a result, the movable iron piece has a small outer diameter
and an increased thickness. However, due to the force, if the movable iron piece outer diameter is
smaller than the on-vehicle size, the holding area with the magnet becomes small and the
magnetic efficiency becomes worse. In addition, the movable iron piece diameter is increased by
4 ? ?! There is a defect that the total thickness of the buzzer increases. In the present
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invention, in order to remove this defect gold, the convex part is put out at the center of the
movable iron piece 17, and only the convex part of-can be used on the moving part. The
following description will be made by including the implementation. The movable iron piece of
the present invention is shown in FIG. FIG. 4 shows a moving plate structure when this is fixed to
the diaphragm. By adopting this structure, even if the peristaltic plate outer diameter is reduced,
the elastic root 11 portion shown in FIG. 4: C-c ',. Further, since the movable iron piece has a
large outer diameter and the magnet has a sufficient holding area, the magnetic efficiency does
not deteriorate, and a sufficient volume can be ensured even with a small-diameter small buzzer.
Therefore, the responsibility of the present invention seems to be large enough.
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