JPH04133295U - sound device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a sounding device in which there is no risk of solid matter such as mud entering through a sound emitting hole adhering to a piezoelectric element and causing a drop in sound pressure. [Structure] In a sounding device comprising a piezoelectric element 1 and an acoustic case 2 that supports the piezoelectric element 1, the acoustic case 2 is connected to a support case part 3 that supports the piezoelectric element 1.
and a sound emitting case portion 4 having a sound emitting hole 4a provided in a front wall 4b substantially perpendicular to the piezoelectric element 1, so that the piezoelectric element 1 and the sound emitting hole do not face each other. .

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a sounding device that does not cause any trouble even when used outdoors.

0002

[Conventional technology]

Piezoelectric buzzers and other sounding devices that use piezoelectric elements are relatively simple in structure, so Used in various fields.

0003 3 and 4 show a conventional piezoelectric buzzer. According to the piezoelectric buzzer shown in Figure 3. For example, around the sound emitting hole 11 in the acoustic case 10, hanging down from the bottom side of the acoustic case 10. A support leg 12 is provided, and a piezoelectric element 13 is connected to the sound emitting hole 11 at the lower end of the support leg 12. It is fixed so that it faces the Furthermore, according to the piezoelectric buzzer shown in FIG. A mounting step 14 is provided at approximately the middle height position on the inner circumference of the base 10, and a pressure is applied to the mounting step 14. An electric element 13 is fixed so as to face the sound emitting hole 11.

0004

[Problem that the idea aims to solve]

However, the former piezoelectric buzzer (Fig. 3) and the latter piezoelectric buzzer (Fig. 4) In both cases, the piezoelectric element 13 directly faces the sound emission hole 11 of the acoustic case 10. Therefore, when used outdoors, solid matter such as mud may enter the piezoelectric element 13 through the sound emitting hole 11. Also, once solid objects adhere to the piezoelectric element 13, it may cause noise. This had the disadvantage of causing a pressure drop.

[0005] Therefore, the purpose of this invention is to prevent solid matter such as mud from entering through the sound emitting hole from adhering to the piezoelectric element. However, it is an object of the present invention to provide a sounding device that is free from the risk of causing a drop in sound pressure.

[0006]

[Means to solve the problem]

In order to achieve the above object, the present invention includes a piezoelectric element and an acoustic device supporting the piezoelectric element. A sounding device comprising a case, the acoustic case and the piezoelectric element. A sound emitting hole is provided in a supporting case portion that supports the piezoelectric element and a wall surface that is substantially perpendicular to the piezoelectric element. The present invention provides a sounding device characterized by comprising a sound emitting case section and a sound emitting case section. Ru.

[0007]

[Effect]

According to the sounding device of the present invention, since the piezoelectric element and the sound emitting hole are not directly opposed to each other, Even if solid matter such as mud enters the sound emitting case through the sound emitting hole, it will adhere to the piezoelectric element. There's no fear.

[0008]

【Example】

An embodiment of the present invention will be described below with reference to the drawings.

[0009] Note that FIGS. 1 and 2 show an embodiment of the present invention, and FIG. 1 shows a part of the sound generation device. FIG. 2 is a cutaway perspective view and a sectional view of the sounding device.

0010 The sounding device of this embodiment includes a piezoelectric element 1 that serves as a sound emission source, and a device that supports the piezoelectric element 1. A sound device made of synthetic resin consisting of a support case part 3 and a sound emitting case part 4 having a sound emitting hole 4a. It is configured to include a sound case 2.

[0011] The support case part 3 is formed into a substantially cubic shape, and the bottom wall thereof is connected to the sound emitting case. The piezoelectric element 1 becomes a partition wall 3a between the sound emitting case part 4 and the sound emitting case part 3a. A mounting hole 3b facing inside 4 is provided.

0012 The sound emitting case portion 4 also has a substantially cubic shape and is installed at the bottom of the support case portion 3. I'm being kicked. The sound emitting case portion 4 is approximately perpendicular to the piezoelectric element 1. The sound emitting hole 4a is provided in the front wall 4b, which is a wall surface, and the sound from the piezoelectric element 1 is temporarily emitted. The sound is reflected by the bottom wall 4c, which is an inner wall, and is emitted from the sound emitting hole 4a to the outside. It has been done. The bottom wall 4c faces the partition wall 3a, and the piezoelectric element 1 It is inclined so that the sound from the hole is efficiently reflected toward the sound emitting hole 4a side. Also, The sound emitting hole 4a has a substantially rectangular shape and is provided over substantially the entire surface of the front wall 4b. Ru.

[0013] According to the sounding device of this embodiment configured as described above, the sound emitted from the piezoelectric element 1 is After the sound is once reflected on the bottom wall 4c, it can be emitted to the outside from the sound emission hole 4a. , and since the piezoelectric element 1 is not directly opposed to the sound emitting hole 4a, if the Even if solid matter such as mud enters the sound emitting case part 4 through the sound emitting hole 4a, the solid matter will There is no risk of solid matter adhering to the piezoelectric element 1, and the sound pressure will be lowered due to solid matter adhering to the piezoelectric element 1. There will be no situation where the decision is made.

[0014] Note that the sound generation device of the present invention is not limited to that shown in the above embodiments. , in short, the acoustic case includes a support case part that supports the piezoelectric element, and a sound emitting part that has a sound emitting hole. The sound emitting hole and the piezoelectric element should not directly oppose each other. Bye.

[0015]

[Effect of the idea]

As explained above, according to the sounding device of the present invention, solidified dirt such as mud that has entered through the sound emitting hole can be removed. There is no risk that shaped objects will adhere to the piezoelectric element and cause a drop in sound pressure.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of a sounding device.

FIG. 2 is a sectional view of the sounding device.

FIG. 3 is a cross-sectional view showing a prior art.

FIG. 4 is a sectional view showing another conventional technique.

[Explanation of symbols]

1 Piezoelectric element 2 Acoustic case 3 Support case part 4 Sound emitting case part 4a Sound emission hole 4b Wall surface perpendicular to the piezoelectric element (front wall) 4c Inner wall (bottom wall)

Claims (1)

[Scope of utility model registration request] 1. A sounding device comprising a piezoelectric element and an acoustic case supporting the piezoelectric element, in which the acoustic case is arranged approximately at a distance from a supporting case portion supporting the piezoelectric element and the piezoelectric element. A sound emitting device comprising a sound emitting case portion having a sound emitting hole provided in a right-angled wall surface.