CN201238379Y

CN201238379Y - Piezoelectric loudspeaker

Info

Publication number: CN201238379Y
Application number: CNU2008200953074U
Authority: CN
Inventors: 何杰; 马国阳; 阮学政
Original assignee: AAC Acoustic Technologies Changzhou Co Ltd
Current assignee: AAC Technologies Holdings Changzhou Co Ltd
Priority date: 2008-07-04
Filing date: 2008-07-04
Publication date: 2009-05-13
Anticipated expiration: 2018-07-04

Abstract

The utility model provides a piezoelectric speaker, which comprises a substrate with a conductive electrode arranged on the surface, a piezoelectric plate, and a frame, wherein, the piezoelectric plate is connected with the surface of the substrate and electrically connected with the conductive electrode, and the frame is used for positioning and supporting the circumference of the substrate. An electric terminal which is electrically connected with the conductive electrode is arranged at one end of the frame. Compared with the prior art, the piezoelectric speaker has the advantages of small quantity of required elements, thin thickness, easy assembly and small volume.

Description

Piezoelectric speaker

Technical field

The utility model relates to a kind of loud speaker, relates in particular to a kind of piezoelectric loudspeaker that uses piezoelectric element.

Background technology

Loud speaker is widely used in the various electronic equipments, is used for converting audio electrical signal to sound to reach the effect of sounding.

Present most widely used loud speaker is a coil-moving speaker, the structure of relevant coil-moving speaker 10 as shown in Figure 4, mainly comprise basin frame 11, join and be provided with basin frame 11 hole 160 loam cake 16, be contained in the magnetic bowl 12 in the basin frame 11, basin frame 11 forms a cavity volume with loam cake 16 and magnetic bowl 12.Be provided with the vibrating diaphragm 15 of loam cake 16 adjacency in this cavity volume, be placed in the magnetic bowl 12 and form the permanent magnet 13 of magnetic gap 18, link to each other and be placed in the interior voice coil loudspeaker voice coil 14 of described magnetic gap 18 with vibrating diaphragm 15 with magnetic bowl 12.Two ends at basin frame 11 also are provided with sheet metal 17, and voice coil loudspeaker voice coil 14 is realized being electrically connected by sheet metal 17, when feeding the alternation tone currents on sheet metal 17, voice coil loudspeaker voice coil 14 is subjected to the motive force of alternation in magnetic gap 18, produce alternate motion, thereby drive vibrating diaphragm 15 vibrations, sound.

Above-mentioned coil-moving speaker has some not enough: (1), its magnetic circuit system cooperate with the moving-coil system, and required element is various, and the thickness of each element all has certain restriction, thereby its thickness does not reach desirable effect; (2) parts are various, the combine and assemble complexity, thus cause complex manufacturing, the cost height.

Thereby, study a kind of new loud speaker to overcome above-mentioned deficiency by necessity.

The utility model content

It is little that the technical problem that the utility model need solve provides a kind of volume, piezoelectric speaker simple in structure.

According to the above-mentioned technical problem that needs solution, designed a kind of piezoelectric speaker, it comprises that the surface is provided with the substrate of conductive electrode, links to each other with substrate surface and piezoelectric patches, location that electrically connects with described conductive electrode and the frame that supports described substrate periphery, and an end of described frame is provided with power connection end that electrically connects with described conductive electrode.

As further improvement of the utility model, the quantity of described piezoelectric patches is two, is connected on the positive and negative surface of substrate.

As further improvement of the utility model, described conductive electrode is the conduction region of bar shaped.

As further improvement of the utility model, described substrate be shaped as rectangle, piezoelectric patches and frame match.

Compared with prior art, few, the thin thickness of the required number of elements of the utility model piezoelectric speaker is so have easy assembling, advantage that volume is little.

Description of drawings

Fig. 1 is the schematic perspective view of the utility model piezoelectric speaker;

Fig. 2 is the decomposing schematic representation of the utility model piezoelectric speaker;

Fig. 3 is the cutaway view of the utility model piezoelectric speaker;

Fig. 4 is the cross-sectional schematic of relevant coil-moving speaker.

Embodiment

The utility model is described in further detail below in conjunction with drawings and embodiments.

As Fig. 1 and Fig. 2, shown in Figure 3, the utility model execution mode piezoelectric speaker 20 comprises substrate 21, the first piezoelectric patches 22a, the second piezoelectric patches 22b, frame 23.Substrate 21 be shaped as rectangle, two piezoelectric patches and frame match.

Substrate 21 comprises front surface 21a, the anti-surface relative with front surface 21a.Be equipped with pair of conductive electrode 210 on positive and negative surface, the conductive electrode on two sides electrically connects by plated-through hole.This conductive electrode 210 is the bar shaped conduction region.

The first piezoelectric patches 22a is connected on the front surface 21a of substrate 21, and the second piezoelectric patches 22b is connected on the anti-surface of substrate 21.Two piezoelectric patches then be located at the substrate front surface, anti-lip-deep conductive electrode 210 links to each other and electrically connect.

The periphery of substrate 21 links to each other with frame 23, promptly by frame 23 supportings and location.End at frame 23 is provided with power connection end 230 that electrically connects with conductive electrode 210.Power connection end 230 can be realized by two leads 24 of welding on power connection end with being connected of external power source.The substrate 21 of present embodiment piezoelectric speaker links to each other with frame 23 can be by realizing with the Double-face gummed paper of frame form fit.Paper also can be taken off by Double-face gummed paper adhesion one deck in bottom at frame.When the client uses, tear and take off paper, promptly the utility model is attached on the carrier and uses.

Piezoelectric patches of the present utility model has inverse piezoelectric effect, promptly under the effect of extra electric field, mechanical deformation takes place.Piezoelectric patches is made by the piezoelectric with piezoelectric effect characteristic, and piezoelectric generally comprises piezoelectric crystal, piezoelectric ceramic, organic polymer piezoelectric.The utility model execution mode

piezoelectric patches

22a, 22b are made by the high piezoceramic material of sensitivity.

Piezoelectric patches 22a of the present utility model, 22b and substrate 21 common formation vibration units, feed the signal of telecommunication on power connection end 230,210 of conductive electrodes are given piezoelectric patches one field effect, thereby make piezoelectric patches generation inverse piezoelectric effect, vibration unit produces vibration, sounds.

Few, the thin thickness of the required number of elements of utility model piezoelectric speaker is so have easy assembling, advantage that volume is little.

Above-described only is execution mode of the present utility model; should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the utility model creation design; can also make improvement, but these all belong to protection range of the present utility model.

Claims

1, a kind of piezoelectric speaker, it is characterized in that: described piezoelectric speaker comprises that the surface is provided with the substrate of conductive electrode, links to each other with substrate surface and piezoelectric patches, location that electrically connects with described conductive electrode and the frame that supports described substrate periphery, and an end of described frame is provided with power connection end that electrically connects with described conductive electrode.

2, piezoelectric speaker according to claim 1 is characterized in that: the quantity of described piezoelectric patches is two, is connected on the positive and negative surface of substrate.

3, piezoelectric speaker according to claim 1 and 2 is characterized in that: described conductive electrode is the conduction region of bar shaped.

4, piezoelectric speaker according to claim 3 is characterized in that: described substrate be shaped as rectangle, piezoelectric patches and frame match.