CN204350298U - Piezoelectric speaker - Google Patents
Piezoelectric speaker Download PDFInfo
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- CN204350298U CN204350298U CN201520086277.0U CN201520086277U CN204350298U CN 204350298 U CN204350298 U CN 204350298U CN 201520086277 U CN201520086277 U CN 201520086277U CN 204350298 U CN204350298 U CN 204350298U
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- lower cover
- piezoelectric speaker
- vibrating diaphragm
- piezoelectric
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Abstract
The utility model discloses a kind of piezoelectric speaker, relate to electro-acoustic product technical field, comprise the upper cover and lower cover that combine, vibrating diaphragm is provided with between described upper cover and described lower cover, the side of described vibrating diaphragm is pasted with piezoelectric patches, it is characterized in that, described upper cover and described lower cover are the border structure of hollow, the edge part of described vibrating diaphragm is fixed between described upper cover and described lower cover, described piezoelectric patches is pasted onto the side of described vibrating diaphragm near described lower cover, the pad of annular is provided with between the edge part of described vibrating diaphragm and described lower cover, described gasket ring is around the periphery of described piezoelectric patches.It is serious that the utility model piezoelectric speaker solves piezoelectric speaker distortion in prior art, the technical problems such as performance curve is unsmooth, and the distortion of the utility model piezoelectric speaker is little, and performance curve is level and smooth, and structure is simple, and it is low to produce cost, long service life.
Description
Technical field
The utility model relates to electro-acoustic product technical field, particularly a kind of piezoelectric speaker.
Background technology
Piezoelectric speaker is a kind of electro-acoustic element being realized electric energy-mechanic energy-acoustic energy conversion by inverse piezoelectric effect, it has advantage that is light, thin, waterproof compared with traditional electro-acoustic element, there is no magnet assemblies because of it simultaneously, therefore its anti-electromagnetic interference capability is strong, because piezoelectric speaker has above-mentioned advantage, it is promoted fast in electroacoustic field, is applied on the electronic equipments such as mobile phone, multimedia player and panel computer by a large amount of.
Existing piezoelectric speaker generally includes upper cover and lower cover, above covers and is provided with phonate hole, and the space internal fixtion that upper cover and lower cover surround has vibrating diaphragm, and vibrating diaphragm is pasted with piezoelectric patches.When to piezoelectric patches input audio electrical signal, piezoelectric patches can produce flexural vibrations according to the size and Orientation of the signal of telecommunication, thus drives the vibrating diaphragm generation flexural vibrations corresponding with input audio signal intensity and frequency to instigate air sounding.Although piezoelectric speaker has above-mentioned multiple advantage, it still has the following disadvantages compared with traditional electro-acoustic element:
One, harmonic distortion is totally higher, and tonequality is poor;
Two, sound is relatively more sharp-pointed, and performance curve is very unsmooth;
Three, during vibration, piezoelectric patches easily collides with upper cover and lower cover, easily causes piezoelectric patches fragmentation to occur, the serious useful life that have impact on piezoelectric speaker;
Four, cost is higher.
Utility model content
For above defect, technical problem to be solved in the utility model is to provide a kind of piezoelectric speaker, and this piezoelectric speaker distortion factor is low, and performance curve is level and smooth, and piezoelectric patches can not collide with upper cover and lower cover, and long service life, cost is low.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A kind of piezoelectric speaker, comprise the upper cover and lower cover that combine, vibrating diaphragm is provided with between described upper cover and described lower cover, the side of described vibrating diaphragm is pasted with piezoelectric patches, described upper cover and described lower cover are the border structure of hollow, the edge part of described vibrating diaphragm is fixed between described upper cover and described lower cover, described piezoelectric patches is pasted onto the side of described vibrating diaphragm near described lower cover, be provided with the pad of annular between the edge part of described vibrating diaphragm and described lower cover, described gasket ring is around the periphery of described piezoelectric patches.
Wherein, described piezoelectric speaker also comprises the FPCB for being electrically connected described piezoelectric patches and external circuit, and described FPCB is fixed on the edge part of described piezoelectric speaker, and the position of the corresponding described FPCB of described lower cover is provided with the breach for dodging described FPCB.
Wherein, described piezoelectric patches is formed by stacking by multi-layer ceramic chip and three-layer metal electrode gap.
Wherein, described FPCB is provided with two conducting channels, and conducting channel described in one of them is provided with an electrical connection section and a pad, and conducting channel described in another is provided with two electrical connection sections and a pad; Three described electrical connection sections are electrically connected three layers of described metal electrode respectively, and two described pads are all electrically connected described external circuit.
Wherein, described piezoelectric speaker is rectangular configuration, and described FPCB is positioned on the side minor face of described piezoelectric speaker.
Wherein, described vibrating diaphragm is the laminated structure of plane.
After have employed technique scheme, the beneficial effects of the utility model are:
Because the utility model piezoelectric speaker comprises the upper cover and lower cover combined, vibrating diaphragm is provided with between upper cover and lower cover, the side of vibrating diaphragm is pasted with piezoelectric patches, and upper cover and lower cover are the border structure of hollow, and the edge part of vibrating diaphragm is fixed between upper cover and lower cover.Upper cover and lower cover are all designed to the border structure of hollow, add sound wave greatly to extraradial area, sound wave reduces to extraradial resistance, and therefore the utility model piezoelectric speaker compared with prior art has the following advantages:
One, effectively reduce harmonic distortion, improve sound quality;
Two, sound acuity reduces, and performance curve is more level and smooth;
Three, piezoelectric patches can not collide with upper cover and lower cover, greatly reduces piezoelectric patches and broken probability occurs, long service life;
Four, product structure is simple, lightweight;
Five, when overall product height is constant, oscillation space can be increased; The overall height of product can be reduced when oscillation space is constant;
Six, materials are few, and cost is low.
In sum, it is serious that the utility model piezoelectric speaker solves piezoelectric speaker distortion in prior art, the technical problems such as performance curve is unsmooth, the distortion of the utility model piezoelectric speaker is little, and performance curve is level and smooth, and structure is simple, production cost is low, long service life.
Accompanying drawing explanation
Fig. 1 is the stereo decomposing structural representation of the utility model piezoelectric speaker;
Fig. 2 is that the constitutional diagram-upper cover of Fig. 1 is upper;
Fig. 3 is that the constitutional diagram-lower cover of Fig. 1 is upper;
Fig. 4 is the A-A line cutaway view of Fig. 2;
Fig. 5 is the B portion enlarged drawing of Fig. 4;
In figure: 10, upper cover, 20, vibrating diaphragm, 30, piezoelectric patches, 40, pad, 50, FPCB, 52, pad, 54, electrical connection section, the 56, first conducting channel, the 58, second conducting channel, 60, lower cover, 62, breach.
Embodiment
Below in conjunction with drawings and Examples, set forth the utility model further.
To define direction that piezoelectric speaker speaks in this specification be upper, contrary direction be under.
As shown in Figure 1, Figure 2, Fig. 4 and Fig. 5 jointly shown in, a kind of piezoelectric speaker, for rectangle structure, comprise the upper cover 10 and lower cover 60 that combine, upper cover 10 and lower cover 60 are the border structure of hollow, the edge part of vibrating diaphragm 20 is clamped between upper cover 10 and lower cover 60, and vibrating diaphragm 20 is the laminated structure of plane, and vibrating diaphragm 20 is pasted with piezoelectric patches 30 near the middle part of lower cover 60 side.Be provided with pad 40 between the edge part of vibrating diaphragm 20 and lower cover 60, pad 40 is loop configuration, is looped around the periphery of piezoelectric patches 30.
As Fig. 1 and Fig. 3 jointly shown in, piezoelectric patches 30 is multi-layer piezoelectric sheet, is namely superposed to fire by multi-layer ceramic chip and three-layer metal electrode gap to form, and in the present embodiment, potsherd is seven layers, and seven layers of potsherd superpose with three-layer metal electrode gap.Piezoelectric patches 30 is electrically connected with piezoelectric speaker external circuit by a FPCB (Flexible Printed Circuit Board, flexible printed circuit board) 50.
As Fig. 1 and Fig. 3 jointly shown in, FPCB50 is provided with the first conducting channel 56 and the second conducting channel 58, first conducting channel 56 is provided with an electrical connection section 54 and pad 52, second conducting channel 58 is provided with two electrical connection sections 54 and a pad 52.Three electrical connection sections 54 are electrically connected with three-layer metal electrode respectively, and two pads 52 are electrically connected the two ends of the audible communication signal of telecommunication on external circuit respectively.
As Fig. 1 and Fig. 3 jointly shown in, FPCB50 comprises the body of strip, body be pasted onto be positioned at piezoelectric speaker side minor face pad 40 on, the bearing of trend of body is identical with the bearing of trend of this side minor face, three electrical connection sections 54 are all positioned at the side of body near piezoelectric patches 30, and two pads 52 are positioned on the lower surface of body.All from then on breach 62, two pads 52 that the position of the body of the corresponding FPCB50 of lower cover 60 is provided with for dodging body are electrically connected with external circuit at breach 62 place.
Because the upper cover of the utility model piezoelectric speaker and lower cover are border structure, effectively increase the area of acoustic irradiation, reduce the resistance of acoustic irradiation, thus effectively reduce harmonic distortion, make performance curve more level and smooth, substantially increase the acoustical behavior of piezoelectric speaker.
This specification is only become the technical scheme of border structure to carry out detailed illustrating middle to upper cover and lower cover hollow out for the piezoelectric speaker of said structure to the utility model, in practical application, the shape of piezoelectric speaker is not limited to rectangle, square, circle, ellipse or some erose piezoelectric speakers all can adopt the structure of this hollow out upper cover and lower cover to carry out harmonic reduction distortion, smoothed curve.And the structure of piezoelectric patches is also not limited to said structure, in piezoelectric patches, the quantity of potsherd and the quantity of metal electrode all can adjust as required, and the structure due to FPCB is suitable with the structure of piezoelectric patches, therefore the structure of FPCB is also not limited to said structure.Those skilled in the art do not need to pay creative work according to the description of this specification and just can will be applied in the piezoelectric speaker of other structure in the technical scheme of the utility model upper cover and lower cover hollow out; therefore no matter identical whether with above-described embodiment of the structure of the shape of piezoelectric speaker, piezoelectric patches and FPCB; as long as have employed, upper cover and lower cover hollow out are carried out harmonic reduction distortion, the piezoelectric speaker product of Lubricity curve all falls within protection range of the present utility model.
Band sequenced first conducting channel related in this specification and the second conducting channel are only to distinguish technical characteristic, do not represent position relationship therebetween, job order.
The utility model is not limited to above-mentioned concrete execution mode, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion made, all drop within protection range of the present utility model.
Claims (6)
1. piezoelectric speaker, comprise the upper cover and lower cover that combine, vibrating diaphragm is provided with between described upper cover and described lower cover, the side of described vibrating diaphragm is pasted with piezoelectric patches, it is characterized in that, described upper cover and described lower cover are the border structure of hollow, the edge part of described vibrating diaphragm is fixed between described upper cover and described lower cover, described piezoelectric patches is pasted onto the side of described vibrating diaphragm near described lower cover, be provided with the pad of annular between the edge part of described vibrating diaphragm and described lower cover, described gasket ring is around the periphery of described piezoelectric patches.
2. piezoelectric speaker according to claim 1, it is characterized in that, described piezoelectric speaker also comprises the FPCB for being electrically connected described piezoelectric patches and external circuit, described FPCB is fixed on the edge part of described piezoelectric speaker, and the position of the corresponding described FPCB of described lower cover is provided with the breach for dodging described FPCB.
3. piezoelectric speaker according to claim 2, is characterized in that, described piezoelectric patches is formed by stacking by multi-layer ceramic chip and three-layer metal electrode gap.
4. piezoelectric speaker according to claim 3, it is characterized in that, described FPCB is provided with two conducting channels, and conducting channel described in one of them is provided with an electrical connection section and a pad, and conducting channel described in another is provided with two electrical connection sections and a pad; Three described electrical connection sections are electrically connected three layers of described metal electrode respectively, and two described pads are all electrically connected described external circuit.
5. the piezoelectric speaker according to the arbitrary claim of claim 2 to 4, is characterized in that, described piezoelectric speaker is rectangular configuration, and described FPCB is positioned on the side minor face of described piezoelectric speaker.
6. piezoelectric speaker according to claim 5, is characterized in that, described vibrating diaphragm is the laminated structure of plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520086277.0U CN204350298U (en) | 2015-02-06 | 2015-02-06 | Piezoelectric speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520086277.0U CN204350298U (en) | 2015-02-06 | 2015-02-06 | Piezoelectric speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204350298U true CN204350298U (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520086277.0U Active CN204350298U (en) | 2015-02-06 | 2015-02-06 | Piezoelectric speaker |
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| Country | Link |
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| CN (1) | CN204350298U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113497999A (en) * | 2020-03-19 | 2021-10-12 | 华为技术有限公司 | Speaker and electronic equipment |
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2015
- 2015-02-06 CN CN201520086277.0U patent/CN204350298U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113497999A (en) * | 2020-03-19 | 2021-10-12 | 华为技术有限公司 | Speaker and electronic equipment |
| CN113497999B (en) * | 2020-03-19 | 2023-04-11 | 华为技术有限公司 | Speaker and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |