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JPS5587597

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DESCRIPTION JPS5587597
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention,
FIG. 1 is a cross-sectional view of a main body case, FIG. 2 is a side view of a detection unit, and
FIG. FIG. 4 is a partially cutaway side view of the sound producing apparatus showing a
conventional example. DESCRIPTION OF SYMBOLS 1 ... Body case 4, 4 ... Water-repellent device,
5 ... Power supply, 9 ... Detection part, 10 ... Cord, 11 ... Sound emission hole, 12 degree 121 ...
Wall part, 13 * · · · Sounding part, 14 · · Sounding body, 15 · · · diaphragm, 17 · · · piezoelectric
element.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bath buzzer in
which a sounding body consisting of a diaphragm and a piezoelectric element is matched in a
body of a bude. In general (the second bath buzzer comprises a sound generation device, a main
body case containing a power supply, and a detection unit electrically connected to this case
through a cord. Then, a moisture-proof film (C1) covering the cone lt ++ on the speaker (a) and
the film (C1), and the film C) closed (in the case where the upper sounding hole te + of the dl is
made of the sound generating hole te +, however, this structure does not have sufficient moisture
resistance, so the speaker cone has the disadvantage of causing deterioration of the bl (Because
(2 not only space for cone (te + formation but also for example ultrasonic welding means etc. are
needed for film stretching, it had the disadvantage that the treatment becomes a very bloody .
The present invention has been made to eliminate the above-mentioned drawbacks, and a sound
producing unit formed by the sound producing hole and the protrusion in the upper lll1 opening
is provided in the main body case, and the diaphragm and the piezoelectric are provided opposite
to the sound producing unit. It is an object of the present invention to provide a bath buzzer
which is improved in moisture resistance, reduced in power consumption, and reduced in power
consumption and space-free and easily obtained by providing a sound-producing body in which
elements are integrated. Hereinafter, the details of the present invention will be described with
reference to the drawings (2) for one embodiment. 11) is a body case of a bath buzzer, which
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comprises an upper case (2) and a lower case (31), and a sounding device (± and battery power
supply (5) is accommodated in the upper case (2); Is provided with the printed circuit board (6)
and the operation switch +7) (7 ') fixed to the board (6), and the switch knob (8+ (eight in eight)
can be operated up as calculated on the top surface of the case (2) (A field shows a detection part
electrically connected to the above-mentioned substrate (6) via code C1Q. The sounding device
14) is provided with a sounding hole U opened at the upper surface of the upper case (2), and
further a wall Q3 (12 pieces projecting downward from above-downward) which divides the
inside of the main body (2) The sounding body I is disposed opposite to the sounding unit 0, and
the sounding body a ◆ has, for example, a diaphragm ttS made of a large-diameter circular tool
and a diameter larger than that of the diaphragms tt and i. The piezoelectric element a.eta. With
the pair of electrodes .mu..sub.eu.rarw. Biased to the surface, the both are attached integrally, and
this sounding body f 141 is the tip of the diaphragm-side crucible inner side wall portion .alpha.
For example, an adhesive is used for bonding, and in addition, it is brought into contact with a
protrusion u9α9 protruding from the back side of the power supply storage case a8 whose base
is fixed to the upper case (2). The node parts except the vibration part are held.
(2) shows a backing. Next, one function is described. First, in use, the detection unit (9) is
suspended in the bathtub for water injection, and when the amount of water reaches a specified
water level, the detection unit (9) operates to send a signal to the sound producing device in the
main case (2). . With this signal, a voltage is applied to the electrode as 1161 of the piezoelectric
element aη to cause mechanical distortion, and an alarm sound can be generated by vibrating
the 畿-叡 t1j integral therewith-the changeover switch (8) Or by the operation of (8 '), the
detection unit (9) can also detect the water temperature or the leaked water and drive the sound
generation unit @ (4) as well. That is, since the piezoelectric element is adopted as the exciter
shaft, the moisture resistance is increased, and the current consumption is reduced. Therefore, it
can be obtained at low cost through a bath buzzer used in a humid environment. Also, since the
sound producing part 0 is divided by the wall part and provided in the case (2), it can be made a
resonance body without requiring a cone part like a speaker. Is held by the case wall (12 ') and
the projection 0 of the battery storage case (4) a8 without impairing the vibration action, so that
the attachment is reliable and an alarm sound of an appropriate volume can be generated. it can.
As described in detail above, the present invention is a bath buzzer including a sound generation
device and a main body case of a power supply interior and a detection unit connected to the
sound generation device and the power supply via a cord. Because the bath buzzer is formed of a
sound generation unit formed in the case (a sound generation unit formed in two cases and a
sound generation body formed by combining a diaphragm and a piezoelectric element disposed
opposite to the sound generation unit, the moisture resistance As in the prior art, since the
application of the moisture-proof film does not require dairying, the workability is improved, and
the structure is simple and inexpensive. In addition, since the cutting cost current is small, the
i41 saponification life can also be improved. Further, since the sound generator is a flat plate of
the diaphragm and the piezoelectric element, it does not require much space, so the conventional
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speaker ( Two have the advantages of each rod, such as being compacted in comparison.
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