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JPS57153399

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DESCRIPTION JPS57153399
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 show a conventional electromagnetic
buzzer and an embodiment thereof. 1 is a cross-sectional view taken along the line M of FIG. 2,
and FIG. 2 is a plan view of a state in which the diaphragm 1 in FIG. 1 is removed. DESCRIPTION
OF SYMBOLS 1 ... diaphragm, 2 ... movable iron piece, 3 ... magnetic core, 4 ... coil, 5 ... ring-like
magnet, 6 ... diaphragm support frame, 7 ... lead substrate electrode, 8: Screw hole for fixing lead
substrate, 9: lead substrate, 10: magnetic core, lla, llb: coil lead, 12: cutout of diaphragm support
for passing lead substrate FIG. 3 shows a cross-sectional view of another embodiment of the
conventional electromagnetic buzzer. 13: A coil lead through hole provided in the core body, FIG.
4 shows a sectional view of an embodiment of the electromagnetic buzzer according to the
present invention. 14: Insulator between diaphragm receiving frame and magnet, 15: Projection
formed on inner periphery of diaphragm receiving frame.
DETAILED DESCRIPTION OF THE INVENTION 1-No 1402 /, f93 ') / This 2I4 is a structure for
fixing a coil lead of an electromagnetic buzzer. Conventionally, as a structure for fixing the core
lead of a four-out type buzzer, as shown in FIGS. 1 and 2, one coil lead 118 is connected to the
core 10, and the other core lead 1m & It is connected to the electrode 7 on the lead substrate 9
which is installed at the upper part of the body IO and exposed to the outside through the notch
I2 of the peristaltic plate receiving frame 6 or as shown in FIG. A structure was used in which the
electrode 7 on the lead substrate 9 was connected through the through hole HI3 provided in the
core lO. However, if such a conventional structure is used, there is no method other than
connecting the other turtle to the magnetic core 10, providing the lead substrate 9 for the other t
pole and exposing it to the outside, and the lead The use of the substrate 90 is inevitable. At the
same time, a process of fixing the lead substrate 9 to the magnetic core 10 and a process of
providing the notch 12 in the moving plate receptacle 6 or a process of opening the through hole
13 of the coil lead in the magnetic core 10 are necessary. come. Also, in FIG. 2, it is possible to
connect the lead terminal 116 to the narrow point of the lead substrate electrical: 17 specific 2-)
03-05-2019
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403 or to connect all the through holes 13 C on the lead substrate electrode 7 in FIG. It is a very
difficult process in mass production. Further, in FIG. 3, the exposure of a part of the lead terminal
11b to the outside of the main body of the buzzer presents a risk of disconnection. The present
invention is intended to eliminate the above-mentioned drawbacks by insulating the diaphragm
receiving frame, the magnetic core and the bleeding t, and using them as both electrodes. FIG. 4,
which details the present invention according to the embodiment shown in the drawings, shows
an embodiment according to the present invention. The one end of the coil lead 11 is connected
to the core lO and the electrode of -J is the same as the conventional embodiment, or the other
coil lead 11b supports the diaphragm 1t of the diaphragm receiving frame 6 The diaphragm
receiving frame 6 itself is connected to a projection 15 provided on the inner periphery of the
lower portion of the step, and is taken as another turtle. At the same time, through the insulator
14, the projection 151 of the diaphragm receiving frame 6 supports the ring magnet 5 magnetic
core 3 core) at the outer peripheral upper end of the block / s and □ / g magnets 5 integrated
with the magnetic core 10 It plays a role of Also here, the movable iron piece 2 does not decrease
the sound generation efficiency “4” by increasing the magnetic gap between the movable iron
piece 2 and the magnetic core 3 and the magnet 5 due to the thickness of the projection [15 of
the diaphragm receiving frame 6 It is fixed in the lower part of 1 and it is h. As described above,
according to the present invention, it is not necessary to use a lead substrate in order to use the
core as one electrode and the peristaltic plate receiving frame as the other electrode. This
eliminates the need for the following steps: providing the notch t in the diaphragm receiving
frame, and providing the through hole in the magnetic core.
Further, by bringing the outer edge of the ring magnet into close contact with the diaphragm
receiving frame over a wide area, the effect of increasing the fixing force between the two is also
exhibited.
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