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JPS55118096

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DESCRIPTION JPS55118096
Specification 1, title of the invention.
How to fix the diaphragm on the sound generator
3. Detailed description of the invention The present invention is a method of intermittently
magnetizing the iron core for intermittent energization of the coil and vibrating the diaphragm
by magnetic coupling with the diaphragm disposed in the vicinity of the iron core. The present
invention relates to a fixing method of a diaphragm outer peripheral support member and the
diaphragm in a sounding body. Conventionally, as a method of fixing the sum, as shown in
Japanese Utility Model Publication No. 34-18843, the peripheral portion of the diaphragm
disposed on the diaphragm outer peripheral support member is partially attached and fixed by a
plurality of screws, A method of caulking and fixing the peripheral portion of the diaphragm as
held by the diaphragm outer peripheral support member as shown in Japanese Utility Model
Publication No. 47-25979, the diaphragm as shown in Japanese Utility Model Publication No. 342080'4. There is known a method of fixing the peripheral edge portion to a clamp ring with an
adhesive, a method of pressing a joint portion between the diaphragm peripheral edge portion
and the diaphragm outer peripheral support member and fixing by resistance welding. However,
since EndPage: 1 but this method uses the peripheral portion of the diaphragm especially for
fixing the diaphragm, the whole surface of the diaphragm is effectively used as a sound
generator, and the inherent property of the diaphragm is also inherent. Because the vibration
characteristics of the speaker can not be used effectively, distortion is likely to be generated in
the diaphragm especially in terms of sounding efficiency in miniaturizing the sounding body, and
the gear tongue between the diaphragm and the iron core In order to eliminate the abovementioned drawback, the diaphragm outer peripheral support member and the outermost
periphery of the diaphragm are subjected to light energy welding (for example, laser welding or
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electron beam welding). FIGS. 1 and 2 show first and second embodiments (schematic crosssectional views) showing a sounding body O structure which implements the diaphragm fixing
method according to the present invention, and in FIG. It consists of a yoke for construction, 5 is
an iron core, 3 is an excitation core outer peripheral support member 1 wound concentrically
with the iron core, and intermittently interrupting the iron core 5 by intermittent energization of
the excitation coil "-" 3. And vibrating the diaphragm 2 by magnetic coupling with the diaphragm
2 disposed in the vicinity of the iron core 5, and FIG. 2 corresponds to FIG. In the second
embodiment, the ring-shaped magnet 7 is disposed between the yoke 4 and the exciting coil 3 in
the sound producing body. In addition, when the sound-producing body is disposed in the watch
side l + as an alarm for a watch as shown in FIG. 3 and FIG. 8 as shown in FIG. 3, the junction
with the member is collected through the 0 ring lθ. It is a 0 ring lock groove formed to hold
gold. The present invention relates to the fixing method of the diaphragm and the diaphragm
outer peripheral support member in the sounding body as described above, and FIG. 4B is a
partially enlarged cross section showing a state during welding of A part in FIG. 1 and FIG. Fig. I)
shows an embodiment showing a method of fixing the diaphragm, and Fig. 5 (Fig. 5A and an
example).
In the former case, as shown in FIG. 4A, the beam 6 is directed from the upper surface to the
predetermined gap 9 from the upper surface as shown in FIG. The moving plate outer peripheral
support portion [11] and the outer diameter are almost the same surface "". As shown in FIG. 5B,
with the diaphragm 2 supported on the diaphragm outer peripheral support member l, as shown
in FIG. The welding is performed at the outermost periphery of the diaphragm. FIG. 6 is a plan
view showing the state after the welding. As shown in 61iZA, the whole circumference of the
outermost periphery of the diaphragm is uniformly O. According to these methods, the
diaphragm is pressed by a strong force at the time of welding. Since it is not necessary to
generate heat locally at the outermost periphery of the diaphragm, iL is hard to be generated,
and a small beam (beam diameter of 0. Since welding is performed with a uniform width by IM),
the fixing force is constant, the vibration amplitude mode is stable, the variation during mass
production is small, and the machining allowance for fixing the diaphragm is very small.
Therefore, various effects such as being able to use the sound pressure and resonance frequency
stable and capable of sounding efficiently can be obtained, which is particularly applicable to
downsizing of the sounding body, such as being able to effectively use the entire EndPage: 2
plane of the diaphragm. is there. As shown in FIG. 6A, when the entire periphery of the
diaphragm is welded and fixed uniformly as shown in FIG. 6A, a completely sealed structure can
be obtained, and as shown in FIG. It has been arranged. The present invention relates to a
method of fixing a diaphragm, and it is needless to say that the diaphragm is excited by
excitation of a coil and no excitation.
4. Brief description of the drawings. FIGS. 1 and 2 are schematic cross-sectional views showing
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the structure of the sounding body subjected to the fixing method according to the present
invention, and FIG. 3 shows the state where the sounding body is disposed on other members.
Schematic cross-sectional views, FIGS. 4 to 6 show the first and second embodiments of the
present invention, and FIGS. 4 AEt and 4 B show the portions A in FIGS. 1 and 2. FIGS. 5A and 5B
are partial enlarged sectional views showing another embodiment corresponding to FIGS. 4A and
4B, respectively, before welding and during welding. FIG. FIGS. 6A and 6 [> B are plan views
showing the state after welding of the first and second embodiments. 1: Diaphragm outer
peripheral support member 2: Diaphragm 2: 2 outermost parts of diaphragm: 3 Excitation coil 4:
Yoke 5: Iron core 6: Beam 7: Ring magnet 8: 0 ring joint Groove, 9 'gap, 10. ○ Ring, 11 welds,
12: sound generator, 13: sound emission hole Patent applicant (Fig. 1) (Fig. 2) (Fig. 4 Al (Fig. 4 B)
(Fig. 5 A) (Fig. 5) Figure B) EndPage: 3
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