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JPS5422482

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DESCRIPTION JPS5422482
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view, FIG. 1 is a sectional view
taken along the line 1--1 in FIG. DESCRIPTION OF SYMBOLS 1 иии Horn и 2 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 и и и и и и и diaphragm и 4a и и и и и и и и и и и и и и и иииии Piezoelectric element, 6 иииииииии Lead terminals.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piezoelectric
buzzer. Is the conventional piezoelectric buzzer a resonance effect? 11. A stainless steel shoulder
supported in a horn, a tie plate such as Berylum Kappa, phosphorus 1-li 5.1-one 1 bronze, etc.,
and a circular piezoelectric element such as barium titanoate having a smaller area than that of
the imaging plate. The configuration is the same as that of the epoxy-based adhesive, and by
applying a voltage between the diaphragm and the piezoelectric element: the imaging plate is
moved further to emit a buzzer sound. However, since the conventional piezoelectric element has
a circular shape and a large area, it can be driven at a low voltage, but on the other hand, it takes
time for contact work, and it is easily broken, and it is a single material plate If a large number of
circular punches are punched out of the piezoelectric element material, there is no sale of the
material, and furthermore, the piezoelectric element material is relatively expensive, and there is
a drawback such as an increase in the unit price of the product. Therefore, since the present
invention proposes a solution to the above-mentioned drawbacks, its feature is to easily process
the piezoelectric element by changing the shape of the piezoelectric element to a circular shape,
for example, to form a square, and to waste the material. It is to reduce the unit price of lost
products. The piezoelectric buzzer 1rn of the present invention will be described in detail based
on FIG. In FIG. 1, 1 is a horn made of a member C of AB 8411 fat or the like, which has a second
to ninth resonance chamber 1a and an acoustic escape hole 1b for producing a resonance effect.
A support 2 made of the same material as the sun of the horn is fixed to the recess 1C which is
bored on the inner peripheral surface of the horn 101 by press-fitting. In addition, an adhesive
may be used in combination for fixing the supporting body 2 7, and also the horn 1 is vertically
disposed and attached to a leather plate such as a printed circuit board 6-9) in its mounting state
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As shown in FIG. 2, there is a leg 1a and an id projecting integrally with the horn 1 as it is on the
printed circuit board 3? The holes 3a, и aIIC 4 provided, and the tip 4 is dissolved ? can be
licked. The peripheral portion of the vibrator 4 is held by the upper end 21 of the support 2 and
the upper end of the horn recess 1C. It is a metal that has been subjected to a 1 t rolling process
and is made of a conductive member such as stainless steel, beryllium kanoha, phosphor bronze
or the like. As shown in FIG. 2, the folding plate 4 has a slot 3bv formed in the strip-like end 4ai
printed board 3 integrally projecting as shown in FIG. 2. и 'Lint prostitute (figure t') and solder
And connect. On the lower surface of vibration 4, eg t и Go, eg: r Barium titanate, ? ? as the
main component The piezoelectric element 5 composed of an i'-n two-component system is fixed
by an epoxy adhesive or the like, and the shape of the piezoelectric element 5 is formed in a
rectangular shape at 5 ░ to 9 ░. It is disposed in the direction in which the longitudinal
direction of the element is one.
The lead terminal 6 is connected to the piezoelectric element 5 by soldering, and the lead
terminal is inserted into the groove 3ciC which is drilled in the printed circuit board 3 while
keeping the space metal not in contact with the terminal 4a of the diaphragm 4 It is connected
by wiring and soldering. Although the shape of the 17 piezoelectric elements 5 on the upper side
is a rectangle, it may be a quadrangle, and in the case of a hexagon, it can be punched out
without waste from the material. In the piezoelectric buzzer configured as described above, when
a voltage is applied to the terminal 4a of the vibration plate 4 and the piezoelectric element 50
load terminal 611 # I, the piezoelectric element V /: electrostrictive phenomenon occurs, and the
imager vibrates. A buzzer sound is generated and resonated in the horn 1 to obtain a sufficient
volume. As described above, according to the piezoelectric buzzer having the / lc configuration,
since the shape of the piezoelectric element is square or hexagonal, adhesion to the diaphragm is
small compared to the conventional circular piezoelectric element VC, and the area is small. ,
Processing is very easy to go. Also, a large number of piezoelectric elements can be obtained
without waste of material from a single piezoelectric element, so it is possible to reduce the cost.
If the PEt element is formed in a rectangular shape, and the rolling direction of the diaphragm
and the longitudinal direction of the piezoelectric element coincide with each other, the
convulsivity t of the spring material of the diaphragm is t? There are many useful advantages,
such as the ability to improve dynamic efficiency.
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