阅读说明：本技术 空气声换能器组件 (Air acoustic transducer assembly ) 是由 赵纯亮 于 2020-04-22 设计创作，主要内容包括：本发明提供一种空气声换能器组件,属于换能器技术领域,其可至少部分解决现有的空气声换能器的具有效率低、所运用的声强低的问题。本发明的一种空气声换能器组件,包括：变幅杆,呈柱状；空气声振子,呈空心锥形,空心锥形的顶点与变幅杆的一端连接,且变幅杆的轴线与空心锥形的轴线在同一条线上；换能器背衬,设置于变幅杆远离空气声振子的一侧。(The invention provides an air acoustic transducer assembly, belongs to the technical field of transducers, and can at least partially solve the problems of low efficiency and low applied sound intensity of the existing air acoustic transducer. An air-acoustic transducer assembly of the present invention includes: the amplitude transformer is columnar; the air acoustic vibrator is in a hollow conical shape, the vertex of the hollow conical shape is connected with one end of the amplitude transformer, and the axis of the amplitude transformer and the axis of the hollow conical shape are on the same line; and the transducer backing is arranged on one side of the amplitude transformer, which is far away from the air sound vibrator.)

1. An airborne acoustic transducer assembly, comprising:

the amplitude transformer is columnar;

the air acoustic vibrator is in a hollow conical shape, the vertex of the hollow conical shape is connected with one end of the amplitude transformer, and the axis of the amplitude transformer and the axis of the hollow conical shape are on the same line;

and the transducer backing is arranged on one side of the amplitude transformer, which is far away from the air sound vibrator.

2. The air acoustic transducer assembly of claim 1, wherein the diameter of the bottom surface of the hollow cone is 1mm to 300 mm, and the included angle between the axis of the hollow cone and the generatrix is 0 ° to 90 °.

3. The air acoustic transducer assembly of claim 1, wherein the horn is integrally formed with the air acoustic vibrator or the horn is removably attached to the air acoustic vibrator.

4. The air-acoustic transducer assembly of claim 1, further comprising:

a piezoelectric wafer connected between the horn and the transducer backing.

5. The air-acoustic transducer assembly of claim 4, further comprising:

the shell is in a hollow cylindrical shape, and the amplitude transformer, the air sound vibrator, the transducer backing and the piezoelectric wafer are all positioned in the shell;

the amplitude transformer comprises an installation structure and is positioned at one end, close to the piezoelectric wafer, of the amplitude transformer, the outer diameter of the installation structure is larger than that of the amplitude transformer, close to the air sound vibrator, and the installation structure is connected with the inner wall of the shell.

6. The air-acoustic transducer assembly of claim 5, further comprising: the supporting disc is connected between the mounting structure and the inner wall of the shell and is made of elastic materials.

7. The air-acoustic transducer assembly of claim 5, further comprising: the sound insulation sheet is in a sheet shape with a central hole, is sleeved at the position of the amplitude transformer close to the air sound vibrator, the outer edge of the sound insulation sheet is connected with the inner surface of the shell at the corresponding position, and a gap is reserved between the sound insulation sheet and the corresponding outer surface of the amplitude transformer.

8. The air-acoustic transducer assembly of claim 5, further comprising:

the electrode leading-out terminal is arranged at one end, far away from the air acoustic vibrator, of the shell, and at least part of the electrode leading-out terminal is positioned outside the shell;

and a lead wire electrically connecting the piezoelectric wafer and the electrode lead terminal.

9. The air acoustic transducer assembly of claim 5, wherein the horn, the piezoelectric wafer, and the transducer backing are each hollow cylindrical, and the horn, the piezoelectric wafer, and the transducer backing are in communication with the hollow holes;

the air acoustic transducer assembly further comprises: and the first interface is connected to one side of the transducer backing far away from the piezoelectric wafer, and the opening of the first interface communicates the hollow hole of the transducer backing with the outside.

10. The air-acoustic transducer assembly of claim 9, further comprising:

the second interface is arranged at one end, far away from the air sound vibrator, of the shell, at least part of the second interface is located outside the shell, and an opening of the second interface is communicated with an opening of the first interface;

a connection hose connecting the first and second ports, the connection hose being formed of an elastic material.

11. The air-acoustic transducer assembly of claim 5, further comprising: and the protective cover is arranged on the end face, close to the air acoustic vibrator, of the shell and covers the hollow hole of the shell.

Technical Field

The invention belongs to the technical field of transducers, and particularly relates to an air-sound transducer assembly.

Background

The application of air sound in daily life is very extensive, such as the radar of backing a car, unmanned aerial vehicle's distance sensor etc.. However, these applications are weak ultrasound applications, and the use of high-intensity airborne sound is still relatively rare, because the technology of transducers with strong airborne sound, especially very strong airborne sound, is not yet satisfactory.

Disclosure of Invention

The invention at least partially solves the problems of low efficiency and low applied sound intensity of the existing air-sound transducer, and provides an air-sound transducer assembly with high efficiency and high sound intensity.

The technical scheme adopted for solving the technical problem of the invention is an air acoustic transducer assembly, which comprises:

the amplitude transformer is columnar;

the air acoustic vibrator is in a hollow conical shape, the vertex of the hollow conical shape is connected with one end of the amplitude transformer, and the axis of the amplitude transformer and the axis of the hollow conical shape are on the same line;

and the transducer backing is arranged on one side of the amplitude transformer, which is far away from the air sound vibrator.

It is further preferred that the diameter of the bottom surface of the hollow cone is 1mm to 300 mm, and the included angle between the axis of the hollow cone and the generatrix is 0 ° to 90 °.

Further preferably, the amplitude transformer and the air sound vibrator are integrally formed, or the amplitude transformer and the air sound vibrator are detachably connected.

Further preferably, the air-acoustic transducer assembly further comprises: a piezoelectric wafer connected between the horn and the transducer backing.

Further preferably, the air-acoustic transducer assembly further comprises: the shell is in a hollow cylindrical shape, and the amplitude transformer, the air sound vibrator, the transducer backing and the piezoelectric wafer are all positioned in the shell; the amplitude transformer comprises an installation structure and is positioned at one end, close to the piezoelectric wafer, of the amplitude transformer, the outer diameter of the installation structure is larger than that of the amplitude transformer, close to the air sound vibrator, and the installation structure is connected with the inner wall of the shell.

Further preferably, the air-acoustic transducer assembly further comprises: the supporting disc is connected between the mounting structure and the inner wall of the shell and is made of elastic materials.

Further preferably, the air-acoustic transducer assembly further comprises: the sound insulation sheet is in a sheet shape with a central hole, is sleeved at the position of the amplitude transformer close to the air sound vibrator, the outer edge of the sound insulation sheet is connected with the inner surface of the shell at the corresponding position, and a gap is reserved between the sound insulation sheet and the corresponding outer surface of the amplitude transformer.

Further preferably, the air-acoustic transducer assembly further comprises: the electrode leading-out terminal is arranged at one end, far away from the air acoustic vibrator, of the shell, and at least part of the electrode leading-out terminal is positioned outside the shell; and a lead wire electrically connecting the piezoelectric wafer and the electrode lead terminal.

It is further preferred that the amplitude transformer, the piezoelectric wafer and the transducer backing are all hollow cylindrical, and the hollow holes of the amplitude transformer, the piezoelectric wafer and the transducer backing are communicated; the air acoustic transducer assembly further comprises: and the first interface is connected to one side of the transducer backing far away from the piezoelectric wafer, and the opening of the first interface communicates the hollow hole of the transducer backing with the outside.

Further preferably, the air-acoustic transducer assembly further comprises: the second interface is arranged at one end, far away from the air sound vibrator, of the shell, at least part of the second interface is located outside the shell, and an opening of the second interface is communicated with an opening of the first interface; a connection hose connecting the first and second ports, the connection hose being formed of an elastic material.

Further preferably, the air-acoustic transducer assembly further comprises: and the protective cover is arranged on the end face, close to the air acoustic vibrator, of the shell and covers the hollow hole of the shell.

In the air acoustic transducer assembly of the embodiment, the shape of the air acoustic transducer and the connection relation of the air acoustic transducer and the amplitude transformer can realize the conversion of the air acoustic transducer assembly to strong air sound, and the electro-acoustic conversion efficiency of the air acoustic transducer assembly is greatly improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of an aero-acoustic transducer assembly in accordance with an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a partial structure of an air-acoustic transducer assembly according to an embodiment of the present invention;

wherein the reference numerals are: 1. an air acoustic vibrator; 2. an amplitude transformer; 21. a mounting structure; 3. a transducer backing; 4. a piezoelectric wafer; 5. a housing; 6. a support disc; 7. a sound-insulating sheet; 8. an electrode lead-out terminal; 9. an outgoing line; 10. a first interface; 11. a second interface; 12. a connecting hose; 13. a shield.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.

In the following description, numerous specific details of the invention, such as structure, materials, dimensions, processing techniques and techniques of components, are set forth in order to provide a more thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.