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JPS57130400

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DESCRIPTION JPS57130400
BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 4 are top and side views of a piezoelectric
buzzer element according to the prior art, and FIG. 2 is a top view and side view of the
piezoelectric buzzer element according to the present invention, and FIG. The figure shows the
relationship between the frequency and the sound pressure of the piezoelectric buzzer element
according to the prior art and the present invention. 3 ииииии Metal diaphragm, 4 иииииии Piezoelectric
ceramic element of circular shape, 5.6 иииииииии Ring-shaped piezoelectric ceramic element.
DETAILED DESCRIPTION OF THE INVENTION The present invention has a structure in which a
circular piezoelectric ceramic element and a ring-shaped piezoelectric ceramic element are
bonded to a circular metal diaphragm made of a single sheet, and different sounds from a
plurality of piezoelectric ceramic elements are detected. The purpose is to provide a piezoelectric
buzzer element that can sound at the same time. Generally, as shown in Fig. 1 (1), the
piezoelectric buzzer element consists of a metal diaphragm 1 and a sheet of piezoelectric ceramic
plate 2 with an adhesive, etc. The present invention, which aims at obtaining one frequency f as a
single tone) as shown in FIG. The present invention is intended to provide a piezoelectric buzzer
element which is completely different from the conventional one, and an embodiment thereof
will be described with reference to FIG. In FIG. 2a, 1 is a circular diaphragm 3 made of a goldplated circular rod, and in this diaphragm 3, a circular piezoelectric ceramic element 4 and ringshaped piezoelectric ceramic elements 5 and 6 are adhesive agents. It is pasted together etc.
According to the piezoelectric buzzer element of this structure, as shown in FIG. f2. It has the
characteristic of being able to get the sound of f3. Here, the ring-shaped piezoelectric ceramic
element may be separately provided. Thus, the piezoelectric buzzer element of the present
invention has the 'i5 advantage that it is possible to easily obtain a sound according to the
preference:' '::', ':: #,' *: r preference. Moreover, since the ring-shaped piezoelectric ceramic
element is used, the same effect as the apparent thickness of the piezoelectric ceramic element is
obtained, and as a result, the displacement of the piezoelectric element 045 becomes larger, and
11-05-2019
1
the sound pressure is increased. It also has an Ori point that can be improved.
11-05-2019
2
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