JPH04119497U - Waterproof piezoelectric buzzer - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a waterproof piezoelectric buzzer that increases sound volume and has a waterproof structure. [Structure] A sealed sounding body with a sealed structure is housed in a case with sound emitting holes on both the front and back sides, and the sealed sounding body has piezoelectric buzzer elements installed oppositely on the front and back sides, or one piezoelectric buzzer element in front and behind it. Consists of cone paper stretched over it. [Effect] Rainwater does not enter the sealed sounding body, and the volume increases.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an improvement of a piezoelectric buzzer.

0002

[Conventional technology]

When a conventional sounding body matches the wavelength of the frequency of the diaphragm, the sound waves from the front and the sound waves from the rear are If the wavelengths do not match, there is a disadvantage that the sounds cancel each other out and the volume decreases, and also rainwater There was a risk that it would enter the sounding body through the horn frame.

0003

[Problem that the idea aims to solve]

The challenge of this invention is to create a completely waterproof structure inside the horn, and also to create a waterproof structure that can increase the volume. The purpose of the present invention is to provide a piezoelectric buzzer for water.

0004

[Means to solve the problem]

The method of this invention is to open sound emitting holes on both the front and back sides and install them in the center of the horn frame. A sealed sounding body is housed inside the case, and this sealed sounding body has two piezoelectric buzzer elements. Is it a sealed structure with cone paper stretched on both the front and back sides of a single piezoelectric buzzer element? It consists of

[0005]

[Effect]

If rainwater gets inside the horn, it will reach the sound emitting hole, but it will not work if the sound is sealed inside the case. Since it does not enter the body, it does not affect pronunciation at all. And the closed sounding body is in the front. , the volume increases because it resonates with the rear surface.

[0006]

【Example】

In the embodiment shown in Fig. 1, 1 is an acoustically designed resin molded case with the center of its front and rear surfaces. Sound emission holes 2 and 3, which also serve as resonant tubes, are bored in the top, and the structure is sealed except for the sound emission holes. is installed in the center of the horn frame 4, and a sealed sounding body 5 is installed inside the case 1. do. The sealed sounding body 5 has piezoelectric buzzer elements 6 and 7 arranged oppositely on both front and rear surfaces, and conductors 8 and 9. More in-phase or anti-phase frequencies are communicated to the communication amplifier. 10 is a sealed sounding body 5 Shows the sound tube installed in front of the.

[0007] Next, in the embodiment shown in FIG. 2, one piezoelectric buzzer element 6 is installed inside the sealed sounding body 5, It is covered with cone paper 11 and 12 and sealed. Other structures are the same as in Figure 1. Ru.

[0008]

[Effect of the idea]

According to the present invention, rainwater that enters through the sound emitting hole does not enter the sealed sounding body at all. This makes it possible to ensure a waterproof structure. A piezoelectric buzzer element that emits sound The wavelength of sound can be easily adjusted by matching or differentiating the vibrations. This has the effect of increasing the volume.

[Brief explanation of drawings]

FIG. 1 is a longitudinal side view.

FIG. 2 is a longitudinal sectional side view of another embodiment.

[Explanation of symbols]

1 case 2,3 Sound emission hole 4 Horn frame 5 Sealed sounding body 6,7 Piezoelectric buzzer element 8,9 Conductor 11,12 Corn paper

Claims (1)

[Scope of utility model registration request] [Claim 1] Sound emitting holes are opened on both the front and rear sides, and a sealed sounding body is housed inside a case installed in the center of the horn frame, and this sealed sounding body has two piezoelectric buzzer elements arranged oppositely, or A waterproof piezoelectric buzzer consisting of a sealed structure with cone paper stretched on both the front and rear sides of a single piezoelectric buzzer element.