CN202535522U - Piezoelectric ceramic loudspeaker with non-metallic diaphragm - Google Patents
Piezoelectric ceramic loudspeaker with non-metallic diaphragm Download PDFInfo
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- CN202535522U CN202535522U CN2012201397787U CN201220139778U CN202535522U CN 202535522 U CN202535522 U CN 202535522U CN 2012201397787 U CN2012201397787 U CN 2012201397787U CN 201220139778 U CN201220139778 U CN 201220139778U CN 202535522 U CN202535522 U CN 202535522U
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- piezoelectric ceramic
- vibration
- film
- ceramic loudspeaker
- elastic film
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Abstract
The utility model discloses a piezoelectric ceramic loudspeaker with a non-metallic diaphragm. The piezoelectric ceramic loudspeaker with the non-metallic diaphragm comprises a front cover and a back cover, wherein sound holes are arranged on the front cover and the back cover. A cavity which is conducive to the vibration of an elastic diaphragm is arranged between the front cover and the back cover. The front cover and the back cover are fixedly connected. The elastic diaphragm is arranged between the front cover and the back cover. A piezoelectric ceramic sheet is arranged on the elastic diaphragm. A flexible print circuit presses against the elastic diaphragm and is connected with the piezoelectric ceramic sheet. The elastic diaphragm is the non-metallic diaphragm. Sound distortion caused by the stiffness of a vibration component is greatly reduced. In addition, by reducing the combination layers of the vibration component, the vibration damping is reduced, the vibration performance is improved, and the vibration life of the piezoelectric ceramic sheet is improved. Furthermore, the metal front and back covers of the piezoelectric ceramic loudspeaker can effectively protect the vibration component, and make the piezoelectric ceramic loudspeaker excellently waterproof, dustproof and the like.
Description
Technical field
The utility model relates to a kind of loud speaker, particularly a kind of piezoelectric ceramic loudspeaker of nonmetallic vibration film.
Background technology
Piezoelectric ceramic loudspeaker is a kind of electro-acoustic element that the inverse piezoelectric effect through piezoceramic material realizes electricity-sound conversion, is widely used in the portable terminal of miniaturization, has multiple particular performances such as ultra-thin, power saving and sound is clear.Its basic principle is piezoelectric ceramic piece and the plate diaphragm formation vibration component that fits together, and through adding alternating voltage to piezoelectric ceramic piece, promotes vibration component constantly upwards and downwarping, sounds thereby promote air.
At present the vibration component of piezoelectric ceramic loudspeaker commonly used is a piezoelectric ceramic piece and the combining of metal foil diaphragm.Its basic structure; Comprise metal bezel, the protecgulum inboard is provided with metallic film, and metallic film is provided with piezoelectric ceramic piece; Metallic film and piezoelectric ceramic piece have constituted the vibration component of piezoelectric ceramic loudspeaker; Flexible electric circuit board is pressed on the piezoelectric ceramic piece, and is electrically connected with it, and metallic film, piezoelectric ceramic piece and flexible print wiring board have constituted a piezo-electric acoustic generator spare.On protecgulum, also be set with bonnet, piezo-electric acoustic generator spare is fixed in the cavity between bonnet and the protecgulum.
The major defect of the piezoelectric ceramic loudspeaker of said structure is: 1, and be easy to generate in piezoelectric ceramic piece and the metallic film that electric current gathers or static, thereby damage other elements, cause unnecessary loss; 2, the rigidity of metal vibrating diaphragm can influence the piezoelectric ceramic piece that is attached thereto, and finally influences the vibration characteristics of whole vibration component, the flatness step-down of piezoelectric speaker frequency response curve consequently, and it is big that the distortion factor of sound becomes.Present stage, the sound bass of piezoelectric ceramic loudspeaker was not enough, and alt is not beautiful, is a main cause of its broader applications of restriction.
Summary of the invention
[0003] in order to overcome above-mentioned defective, the utility model provides a kind of piezoelectric ceramic loudspeaker that does not have the nonmetallic vibration film that static gathers, audio distortions is little.
The utility model for the technical scheme that solves its technical problem and adopt is: a kind of piezoelectric ceramic loudspeaker of nonmetallic vibration film; Comprise the protecgulum and the bonnet that are provided with penetrable sound hole; Be provided with the cavity that is beneficial to the elastic film vibration in the middle of said protecgulum and the bonnet, said protecgulum is fixedly connected with bonnet, and elastic film is located between protecgulum and the bonnet; Said elastic film is provided with piezoelectric ceramic piece; One flexible electric circuit board is pressed on the elastic film, and is connected with piezoelectric ceramic piece, and said elastic film is the nonmetal film sheet.
As the further improvement of the utility model, the nonmetal film that the nonmetal film that said elastic film is processed for the polyurethane organic material or other organic materials and inorganic material are processed.
As the further improvement of the utility model, said elastic film is made up of two-layer or two-layer above nonmetal film.
The beneficial effect of the utility model is: because the utility model adopts no sheet metal, the negative effect that does not exist electric current to gather is because the caused audio distortions degree of rigidity of vibration component also can reduce greatly.In addition,, reduced vibration damping, improved vibration performance, also improved the vibration life of piezoelectric ceramic piece through reducing the combination number of plies of vibration component; Moreover the forward and backward lid of the metal of piezoelectric ceramic loudspeaker can effectively be protected vibration component, also can make piezoelectric ceramic loudspeaker obtain effects such as good water proof and dust proof.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the double-deck elastic film structures sketch map of the utility model.
Embodiment
In order to deepen understanding to the utility model, will combine embodiment and accompanying drawing that the utility model is done further to detail below, this embodiment only is used to explain the utility model, does not constitute the qualification to the utility model protection range.
Fig. 1 has shown the execution mode of the piezoelectric ceramic loudspeaker of a kind of nonmetallic vibration film of the utility model: comprise the protecgulum 1 and bonnet 2 that are provided with penetrable sound hole; Said protecgulum 1 and the bonnet 2 middle cavitys 6 that are beneficial to elastic film 3 vibrations that are provided with; Said protecgulum 1 is fixedly connected with bonnet 2; Elastic film 3 is located between protecgulum 1 and the bonnet 2, and said elastic film 3 is provided with piezoelectric ceramic piece 4, one flexible electric circuit boards 5 and is pressed on the elastic film 3; And be connected with piezoelectric ceramic piece 4; Said elastic film 3 is the nonmetal film sheet, the nonmetal film that the nonmetal film that said elastic film 3 is processed for the polyurethane organic material or other organic materials and inorganic material are processed, and said elastic film 3 is made up of two-layer or two-layer above nonmetal film.
When through flexible electric circuit board 5 incoming audio signals, according to the inverse piezoelectric effect principle of piezoelectric ceramic piece 3, vibration component will produce corresponding stretching, extension or contractile motion, promotes air and sounds.Because no sheet metal, the negative effect that does not exist electric current to gather is because the caused audio distortions degree of rigidity of vibration component also can reduce greatly.In addition,, reduced vibration damping, improved vibration performance, also improved the vibration life of piezoelectric ceramic piece through reducing the combination number of plies of vibration component; Moreover the forward and backward lid of the metal of piezoelectric ceramic loudspeaker can effectively be protected vibration component, also can make piezoelectric ceramic loudspeaker obtain effects such as good water proof and dust proof.
In actual use, according to the different materials that elastic film adopted, can change its structure; To improve tonequality; As shown in Figure 2 is a kind of improvement, and elastic film is formed by the pressing of two-layer different elasticity material, states the protection range that these improvement or improved combination all should belong to this patent.
Claims (3)
1. the piezoelectric ceramic loudspeaker of a nonmetallic vibration film; It is characterized in that: comprise the protecgulum (1) and the bonnet (2) that are provided with penetrable sound hole; Be provided with the cavity (6) that is beneficial to elastic film (3) vibration in the middle of said protecgulum (1) and the bonnet (2), said protecgulum (1) is fixedly connected with bonnet (2), and elastic film (3) is located between protecgulum (1) and the bonnet (2); Said elastic film (3) is provided with piezoelectric ceramic piece (4); One flexible electric circuit board (5) is pressed on the elastic film (3), and is connected with piezoelectric ceramic piece (4), and said elastic film (3) is the nonmetal film sheet.
2. the piezoelectric ceramic loudspeaker of nonmetallic vibration film according to claim 1 is characterized in that: the nonmetal film that the nonmetal film that said elastic film (3) is processed for the polyurethane organic material or other organic materials and inorganic material are processed.
3. the piezoelectric ceramic loudspeaker of nonmetallic vibration film according to claim 1, it is characterized in that: said elastic film (3) is made up of two-layer or two-layer above nonmetal film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201397787U CN202535522U (en) | 2012-04-06 | 2012-04-06 | Piezoelectric ceramic loudspeaker with non-metallic diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201397787U CN202535522U (en) | 2012-04-06 | 2012-04-06 | Piezoelectric ceramic loudspeaker with non-metallic diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202535522U true CN202535522U (en) | 2012-11-14 |
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ID=47136672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201397787U Expired - Fee Related CN202535522U (en) | 2012-04-06 | 2012-04-06 | Piezoelectric ceramic loudspeaker with non-metallic diaphragm |
Country Status (1)
| Country | Link |
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| CN (1) | CN202535522U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103886855A (en) * | 2014-03-13 | 2014-06-25 | 广州市番禺奥迪威电子有限公司 | Low frequency buzzer |
-
2012
- 2012-04-06 CN CN2012201397787U patent/CN202535522U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103886855A (en) * | 2014-03-13 | 2014-06-25 | 广州市番禺奥迪威电子有限公司 | Low frequency buzzer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20200406 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |