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JPS57150900

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DESCRIPTION JPS57150900
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a cross-sectional view of a conventional
basic structure of an electromagnetic buzzer. 1 и и и Diaphragm, 2 и и и и и и и и и и и movable iron piece,
и и и и и и и и и и и и и и и и и и и и и и и и и и by nonmagnetic material The diaphragm receiving frame 6, 6 ... ring
shape or block magnet, 7 ... core body. FIG. 2 shows a cross-sectional view of the electromagnetic
buzzer of the structure according to the present invention. 5a ииииии Diaphragm receiving frame
made of magnetic material, 5b иииииии Protrusions provided on diaphragm receiving frame, 6 ииииии
Ring magnet.
DETAILED DESCRIPTION OF THE INVENTION The present proposal relates to the structure of a
II 'type buzzer, and it is 1-1067 //. Sigma. As shown in FIG. 1, the basic structure of the
conventional small electromagnetic type magnetic sensor has a core 3 wound with a coil 4 at the
center, and is equal to the mosquito core 3 and the center? Then place the diaphragm 1 with the
movable iron piece 2 fixed to the upper part directly above, place the ring covering block magnet
6 around the metered coil 4 and place the magnetic core 5, magnet 6 and magnet 6 by the
magnetic core 7 The diaphragm support 5 supporting the diaphragm 1 is fixed. Although the
diaphragm receiving frame 5 is a nonmagnetic material, the six bodies 7 are made of a magnetic
material or the like for forming a grooved circuit connecting the magnetic core 3 and the magnet
6. However, in the electromagnetic buzzer of such a structure, the magnet 6 is thrown to the
outside of the coil 4 so that the outer diameter of the coil 4 is large and the movable iron is
movable when the outer diameter of the movable iron piece 2 becomes small. The distance
between the iron piece 2 and the s-pole of the magnet 6 becomes large, and the magnetic
resistance of the magnetic circuit tends to increase and the sounding efficiency tends to decrease.
Since the diaphragm receiving frame 5 is further installed outside the oval magnet 6, the outer
diameter is increased, so that the outer diameter is large. In the case of using the block magnet of
the above, T # for positioning and adhering to the core 72-068 was accompanied by difficulties
in mass production management. The present invention uses a diaphragm receiving frame Kit-
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type body frame, and is a book in which the superior-defensiveness is eliminated by forming a
structure in which the diaphragm receiving frame and the magnet multi-layer are superimposed
on each other. The present invention will be described in detail according to the embodiment
shown in FIG. Just above the wound core 9 of the coil 7 is the same center (the movable iron
piece 2 fixed to the lower part of the diaphragm 1 is installed, and the diaphragm receiving frame
5a supporting the diaphragm 1 is a wedge frame The magnetic circuit C1 is formed by a body
and connects the movable iron piece 2 and the ring-shaped magnet 6 to a part. In addition, a
projection 5b is formed to reduce the gap between the inner circumference KFi movable iron
piece 2 of the diaphragm receiving frame 5a and the IP iron clearance 2. Furthermore, the Km
core 7 is configured as a magnetic circuit that connects the ring magnet 6 and the t core 3 at one
o'clock when the t core 3 is fixed. As described above (according to the structure according to the
present invention, the protrusion 5b formed on the inner periphery of the vibration temporary
support # 5a made by the foundation frame is brought close to the movable iron piece 2 by K, It
does not depend on the outer diameter or the outer diameter of the movable iron 2 (H between
the projection lTll 5b and the movable 3-p ? mountain ob 9 to the dynamic iron 2! The gap is
always kept at the minimum size, the magnetic resistance is increased compared to the
conventional structure, the sound emission efficiency can be increased, and the laminated
magnet 6 and the diaphragm receiving frame 5a are superimposed on each other. Dance with a
smaller outer diameter.
In # I-, the effect of avoiding the m- associated with the positioning for fixing the magnet, which
occurs when a plurality of block magnets are used in the conventional structure, also shines.
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