CN204697287U - piezoelectric speaker - Google Patents

Abstract

The utility model discloses a piezoelectric speaker, which comprises a conductive terminal, a frame, a diaphragm fixed to the frame, and a piezoelectric sheet fixed to the diaphragm, and the piezoelectric speaker also includes a hearing-aid voice coil , the hearing aid voice coil is a planar voice coil, and the planar hearing aid voice coil is etched on the surface of the piezoelectric sheet; the piezoelectric sheet and the hearing aid voice coil are respectively electrically connected to the conductive terminals. In the piezoelectric speaker of the utility model, the hearing-aid voice coil is etched on the piezoelectric sheet without occupying the internal space of the piezoelectric speaker, and does not increase the thickness of the piezoelectric speaker, which is beneficial to the thin design of the product, and reduces the assembly time of the piezoelectric speaker. Difficulty in production, simplifying the production process; the hearing aid voice coil will not affect the performance of the piezoelectric speaker, which is conducive to improving product performance. The piezoelectric loudspeaker of the utility model has the advantages of good thin design, simple process and good performance.

Description

piezoelectric speaker

technical field

The utility model relates to the field of electroacoustics, in particular to a piezoelectric speaker.

Background technique

With the development of science and technology, portable electronic devices are widely concerned by people, and the loudspeaker device, as the main sound generating unit of the portable electronic terminal, directly affects the use effect of the portable electronic device.

As portable electronic devices become thinner and thinner, the thickness of speaker devices has increasingly become the focus of attention in the industry. Piezoelectric speakers are increasingly becoming the focus of the industry because of their thinness. In order to improve the application effect of the piezoelectric speaker, a hearing-aid voice coil is provided in the piezoelectric speaker. In the existing piezoelectric speaker with a hearing-aid voice coil, the hearing-aid voice coil needs to be placed separately, and the process is complicated. The ring occupies the internal space of the piezoelectric speaker, affects the performance of the piezoelectric speaker, and increases the production cost.

Therefore, it is necessary to propose an improvement to overcome the defects of the piezoelectric speaker provided with a hearing-aid voice coil in the prior art.

Utility model content

The technical problem to be solved by the utility model is to provide a piezoelectric loudspeaker with good thin design, simple process and good performance.

In order to achieve the above purpose, the utility model piezoelectric speaker adopts the following technical solutions:

A piezoelectric speaker, comprising a conductive terminal, a frame, a diaphragm fixed to the frame, and a piezoelectric sheet fixed to the diaphragm, and: the piezoelectric speaker also includes a hearing aid voice coil, the hearing aid The voice coil is a planar voice coil, and the planar hearing aid voice coil is etched on the surface of the piezoelectric sheet; the piezoelectric sheet and the hearing aid voice coil are respectively electrically connected to the conductive terminals.

As a preferred technical solution, the conductive terminals are respectively provided with pads corresponding to the piezoelectric sheet and the hearing-aid voice coil, and the piezoelectric sheet and the hearing-aid voice coil pass through the pads and the hearing-aid voice coil. The conductive terminals are electrically connected.

As a preferred technical solution, the piezoelectric sheet is provided with electrodes, and the electrodes of the piezoelectric sheet are electrically connected to the conductive terminals. As a further preference, the hearing aid voice coil avoids the arrangement of the electrodes.

As a preferred technical solution, the piezoelectric film includes two parts of the piezoelectric film, the two parts of the piezoelectric film are respectively arranged on both sides of the diaphragm, and the hearing aid voice coil is arranged on the two parts on any part of the piezoelectric sheet.

As a preferred solution of the above solution, the hearing aid voice coil may be any one of silver, palladium, nickel, and molybdenum-manganese alloy.

As a preferred technical solution, the frame includes a front cover and a rear shell, and the front cover is provided with a sound hole.

As a preferred technical solution, the diaphragm is connected and fixed to the piezoelectric sheet through a gasket. As a further preferred technical solution, the gasket is made of polyethylene naphthalate.

As a preferred technical solution, the conductive terminal is a flexible circuit board.

In the piezoelectric speaker of the utility model, the hearing-aid voice coil is a planar voice coil, and the hearing-aid voice coil is etched on the surface of the piezoelectric sheet, and the hearing-aid voice coil and the piezoelectric sheet are integrated, so that the hearing-aid voice coil does not occupy the piezoelectric speaker The internal space does not increase the thickness of the piezoelectric speaker, which is conducive to the thin design of the product. In addition, the hearing aid voice coil is etched on the piezoelectric sheet, which reduces the production difficulty of the piezoelectric speaker assembly and simplifies the production process; the hearing aid voice coil will not affect the performance of the piezoelectric speaker, which is conducive to improving product performance. Therefore, the piezoelectric speaker of the utility model has the advantages of good thin design, simple process and good performance.

Description of drawings

Fig. 1 is an exploded view of the utility model piezoelectric speaker;

FIG. 2 is a schematic diagram of the combination of the piezoelectric sheet, the hearing aid voice coil and the conductive terminals of the piezoelectric speaker shown in FIG. 1 .

Detailed ways

Below in conjunction with accompanying drawing, describe the utility model content in detail:

As shown in Figures 1 and 2, the piezoelectric speaker of the present invention includes a frame, a diaphragm 2 fixed to the frame and a piezoelectric sheet 3 fixedly combined with the diaphragm 2, the frame includes a front cover 11 and a rear case 12, the diaphragm The membrane 2 is accommodated and fixed between the front cover 11 and the rear case 12 . The piezoelectric speaker of the utility model also includes a conductive terminal 5 , and the piezoelectric sheet 3 is electrically connected to the conductive terminal 5 . The conductive terminal 5 electrically combines the piezoelectric film 3 with the external circuit, and the external drive signal enters the piezoelectric film 3 through the conductive terminal 5, and the piezoelectric film 3 vibrates due to the inverse piezoelectric effect, driving the diaphragm 2 to vibrate, and the diaphragm 2 vibrates Instigate the air to make a sound.

As shown in Figure 2, the piezoelectric speaker of the utility model also includes a hearing aid voice coil 6, which is a planar voice coil etched on the surface of the piezoelectric sheet 3, and the hearing aid voice coil 6 improves the piezoelectric speaker Performance when used with hearing aids, increasing the versatility of piezoelectric speaker applications. The planar hearing-aid voice coil 6 arranged on the surface of the piezoelectric sheet 3 avoids the occupation of the internal space of the piezoelectric speaker by the hearing-aid voice coil, which is conducive to the thin design of the piezoelectric speaker. At the same time, during the assembly process of the piezoelectric speaker, The hearing aid voice coil does not need to be placed separately, the production process is simplified, and the hearing aid voice coil will not affect the performance of the piezoelectric speaker, which is conducive to improving the performance of the piezoelectric speaker.

As shown in Figure 2, the conductive terminal 5 is provided with a first pad 51 corresponding to the piezoelectric sheet 3, and a second pad 52 is provided corresponding to the hearing-aid voice coil 6, and the piezoelectric sheet 3 and the hearing-aid voice coil 6 are respectively connected through independent The pads of the pads are electrically connected to the conductive terminals 5, and will not interfere with each other, which is beneficial to improving product performance.

In the piezoelectric speaker of this embodiment, the piezoelectric sheet 3 is provided with electrodes, and the electrodes are electrically connected to the conductive terminals 5 . The hearing aid voice coil 6 avoids the arrangement of the electrodes of the piezoelectric sheet 3 to ensure that the hearing aid voice coil 6 and the electrodes of the piezoelectric sheet 3 do not interfere with each other and improve product performance.

In practical applications, the piezoelectric sheet 3 can also be arranged in two pieces, and the two piezoelectric sheets are respectively arranged on both sides of the diaphragm 2 to improve the acoustic performance of the piezoelectric speaker. The hearing aid voice coil 6 can be arranged on any On the piezoelectric sheet, the advantages of the piezoelectric speaker of the utility model are not affected.

In practical applications, the hearing-aid voice coil can be any one of silver, palladium, nickel, molybdenum-manganese alloy, or metal or alloy of other materials, so as to ensure smooth conduction of the flat hearing-aid voice coil and play an auxiliary role. Listen to the function, improve product performance and user experience.

As shown in FIG. 1 , in the piezoelectric speaker of this embodiment, the front cover 11 is provided with a sound outlet for emitting sound.

As shown in Figure 1, a backing ring 4 is arranged between the piezoelectric sheet 3 and the diaphragm 2, the piezoelectric sheet 3 is connected and fixed to the diaphragm 2 through the backing ring 4, and the backing ring 4 can improve the consistency of the vibration of the diaphragm 2, Improving the acoustic performance of piezoelectric speakers. As a preferred solution, the backing ring 4 can be polyethylene naphthalate material.

In practical applications, the vibrating membrane 2 may be a polymer material vibrating membrane. The conductive terminal can be a flexible circuit board. All can embody the utility model piezoelectric loudspeaker advantage.

In the piezoelectric speaker of the utility model, the hearing-aid voice coil is a planar voice coil, and the hearing-aid voice coil is etched on the surface of the piezoelectric sheet, and the hearing-aid voice coil and the piezoelectric sheet are integrated, so that the hearing-aid voice coil does not occupy the piezoelectric speaker The internal space does not increase the thickness of the piezoelectric speaker, which is conducive to the thin design of the product. In addition, the hearing aid voice coil is etched on the piezoelectric sheet, which reduces the production difficulty of the piezoelectric speaker assembly and simplifies the production process; the hearing aid voice coil will not affect the performance of the piezoelectric speaker, which is conducive to improving product performance. Therefore, the piezoelectric speaker of the utility model has the advantages of good thin design, simple process and good performance.

The above is only an implementation example of the utility model, and is not intended to limit the utility model, but any equivalent modification or change made by those of ordinary skill in the art based on the content disclosed in the utility model should be included in the scope of protection recorded in the claims Inside.

Claims (10)

1. a piezoelectric speaker, comprise conducting terminal, framework, the vibrating diaphragm fixed with described framework and the piezoelectric patches being fixed on described vibrating diaphragm, it is characterized in that: described piezoelectric speaker also comprises listening help circle, described listening help circle is planar voice-coil, and described plane listening help circle etching is arranged at described piezoelectric patches surface; Described piezoelectric patches is electrically connected with described conducting terminal respectively with described listening help circle.

2. piezoelectric speaker according to claim 1, is characterized in that: the corresponding described piezoelectric patches of described conducting terminal and described listening help circle are respectively arranged with pad, and described piezoelectric patches is electrically connected with described conducting terminal by described pad with described listening help circle.

3. piezoelectric speaker according to claim 1, is characterized in that: described piezoelectric patches is provided with electrode, and described piezoelectric patches electrode is electrically connected with described conducting terminal.

4. piezoelectric speaker according to claim 3, is characterized in that: described listening help circle is dodged described electrode and arranged.

5. piezoelectric speaker according to claim 1, it is characterized in that: described piezoelectric patches comprises two parts piezoelectric patches, described two parts piezoelectric patches is arranged at the both sides of described vibrating diaphragm respectively, and described listening help circle is arranged in an arbitrary part for described two parts piezoelectric patches.

6. the piezoelectric speaker according to the arbitrary claim of claim 1 to 5, is characterized in that: described listening help circle can be any one in silver, palladium, nickel, molybdenum-manganese alloy.

7. piezoelectric speaker according to claim 1, is characterized in that: described framework comprises protecgulum and back cover, and described protecgulum is provided with phonate hole.

8. piezoelectric speaker according to claim 1, is characterized in that: described vibrating diaphragm and described piezoelectric patches are connected and fixed by gasket ring.

9. piezoelectric speaker according to claim 8, is characterized in that: described gasket ring is PEN material.

10. piezoelectric speaker according to claim 1, is characterized in that: described conducting terminal is flexible circuit board.