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JPS56143983

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DESCRIPTION JPS56143983
Description of the Invention Electronic device L module and a diaphragm to which a piezoelectric
element is attached are incorporated in a case In an electronic device, the diaphragm to which
the piezoelectric element is attached is accommodated in a hole of the module An electronic
device that is characterized by
Claims
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic
device such as, for example, a watch with an alarm function. As a watch with an alarm function,
one having a structure as shown in FIG. 1 can be considered. This alarm function wristwatch
incorporates a% liquid crystal display 2, a module 3 incorporating electronic components for
controlling the liquid crystal display 2 etc. in a case 1, and a battery 4 loaded with the module 3 I
/ c. At the same time, a cover glass 5 made of transparent glass is provided on the liquid crystal
display body 211 of the caset, and a removable back cover 6 is provided on the side of the
modular 3. In addition, a disk-like movable plate 8 on which a disk-like pressure% element 7 is
attached is provided at @IIC of the pseudo 1t6. Furthermore, one 1 of one piezoelectric
accumulator 7! An output contact 9 extending downward from the module 3 is in contact with
the pole surface, and a ground contact 10 extending downward from the module 3 is in contact
with the diaphragm 8 in conduction with the other 11L storage surface of the piezoelectric
element 7 doing. A waterproof pad 11 is interposed between the diaphragm 8 and the outer
periphery of the back cover 6. In addition, a pressure is applied to the piezoelectric element 7
near the outer peripheral portion of the back cover 6. A plurality of sound extraction holes for
extracting the sound generated by the vibration of the diaphragm 8 due to EndPage: 1 to the
outside 12 is worn. However, in the above-described structure, the module 3, the piezoelectric
element 7 and the diaphragm 8 are individually disposed in a multi-layered manner, and the
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output rigid contact is provided between the module 3 and each of the piezoelectric element 7
and the diaphragm 8. Since the point 9 and the ground contact 10 intervene, the thickness of the
entire watch is increased by 9 and the dimension in the width direction of the diaphragm 80 is
also increased. Also, the above-mentioned structure involves problems in terms of assemblability
and definition. The present invention has been made to solve the above-mentioned problems, and
it is an object of the present invention to provide an is-type electronic apparatus which is
excellent in assembly and reproducibility and which is easy to replace parts. . In order to achieve
this object, an electronic device according to the present invention comprises an electronic
device according to the present invention including a module and a vibration & to which an
FE11L element is attached and which is incorporated in a case, the diaphragm including the
piezoelectric element attached. It accommodates in the hole of said Moziere. In one embodiment
51 of the present invention, the diaphragm can be releasably supported by a rubber ring on a
projection integrally formed with the module in the hole of the module. In another embodiment,
the diaphragm can be releasably supported by a ring-like support for the lead conductor
projecting into the hole of the module, and the ring-like support is a conductive rubber ring And
one electrode may be omitted.
The invention will now be further described according to the examples shown in the drawings.
FIG. 2 is a schematic cross-sectional view showing an embodiment of an electronic device which
is a wristwatch according to the present invention. The same reference numerals as in FIG. 1
denote the same or corresponding parts. Do. In the embodiment of FIG. 2, a hole 13 is formed in
a part of the module 3 and the lower side of the hole 13 is sealed with a rubber pad 14 to be
waterproof. Further, a lead conductor 15 formed and processed from a lead frame protrudes
inside the hole 13 in an eaves shape, for example, from the direction of the candle, and the
rubber having an H-shaped cross section on the inner peripheral surface side of the lead
conductor 15 A ring (ring-like support) 16 is detachably fitted on an outer periphery # 116A
(FIG. 4) on the outer peripheral side. Further, the diaphragm 8 having the piezoelectric element 7
attached to the upper surface thereof as described above is detachably VC fitted and supported
in the inner peripheral groove 168 formed with the inner periphery llK of the rubber ring 16. In
addition, since it is made of the rubber ring 16 # i conductive rubber of the present embodiment,
it is possible to omit the ground contact ('polarization) by grounding the lead conductor 151.
There is an advantage. In the non-embodiment, the diaphragm 8 to which the pressure # LIA
element 7 is attached is easy from the lower side of the hole 13 with respect to the fringe-like
lead conductor 15 which protrudes inside the hole 13 of the module 3 by the rubber ring 16 In
addition to being able to be attached and detached, to obtain extremely good assemblability, it is
also possible to easily replace only the diaphragm 8 to which the piezoelectric element 7 is
attached, and it is also possible to obtain good reproducibility. In addition, since the diaphragm
8Fi in the present embodiment is indirectly supported by the lead conductor 15 of the module 3
via the rubber pad 16 all around, so-called vibration nodes are not fixed, so that the vibration
property is extremely good. Since a thin diaphragm can be used, it is possible to equalize sound
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pressure and frequency characteristics. Furthermore, in the present embodiment, it is also
possible to obtain good waterproofness by the rubber packing 14. FIG. 3 is a partially enlarged
sectional view showing another embodiment of the present invention. In this embodiment, in the
support of the diaphragm 8, the inside of the weir 13 of the module 3 & the inside of the radial
direction from the inner wall surface of the hole 13 The protrusion 3AK is integrally formed in
the direction. Also in this embodiment, the rubber ring 16 can be easily attached to the
projection 3AK from the lower side of the hole 13, and good assembly can be obtained, and
substantially the same effects as the embodiment of FIG. 2 can be obtained. However, in the
present embodiment, since the diaphragm 8 and the projection 3AFi are not electrically
connected, the ground contact 10 in contact with the upper surface of the diaphragm 8 is
provided.
FIGS. 4 (2) and (4) are a plan view showing an example of a rubber ring 16 having a substantially
H-shaped or EndPage: 29 ril-shaped cross-sectional shape used in the present invention and a
cross-sectional view taken along the line fV-fV. The rubber ring 16 is one circle 1! As shown in
FIG. An outer circumferential groove 16A and an inner circumferential surface 1116B may be
formed on the outer circumferential side and the inner circumferential surface of the donut ring
according to li [10, respectively. In addition, rubber rings 16F1m4 having an arbitrary shape
other than those shown in FIGS. 5 and 5 can also be used. FIG. 6 is a perspective view showing a
state in which the piezoelectric element 7 is attached to the diaphragm 8, and is an example in
which both the pressure mc clincher 7 and the diaphragm 8 have a circular shape. The present
invention can be widely applied to various electronic devices ltK such as a calculator and a
teletype in addition to a wristwatch with an alarm function. As described above, according to the
present invention, it is possible to obtain excellent operational effects such as good assembly and
reproductivity, and improvement of the sound pressure and the wavenumber characteristics of
the diaphragm. Be
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic sectional view showing a watch
with an alarm function, FIG. 2 is a schematic sectional view showing one embodiment in which
the present invention is applied to a watch with an alarm function, and FIG. 4 is a plan view of an
example of a rubber ring used in the present invention, and FIG. 5 is a sectional view thereof, and
FIG. 5 is a cross-sectional view of the present invention. FIG. 6 is a plan view showing another
example of a rubber ring used in the present invention and a v-vm sectional view thereof, and
FIG. DESCRIPTION OF SYMBOLS 1 ... Case, 2 ... Liquid crystal display body, 3 ... Module, 3A ...
Protrusion, 4 ... Battery, 5 ... Cover glass, 6 ... Back cover, 7 ... Piezoelectric element, 8: diaphragm,
13: hole, 14: rubber pad, 15: lead conductor, 16: 1 1 figure 2 figure 2 figure 3 yJ4 figure yA6
figure EndPage: 3
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