CN201667714U - Piezoelectric type loudspeaker - Google Patents
Piezoelectric type loudspeaker Download PDFInfo
- Publication number
- CN201667714U CN201667714U CN2010201398013U CN201020139801U CN201667714U CN 201667714 U CN201667714 U CN 201667714U CN 2010201398013 U CN2010201398013 U CN 2010201398013U CN 201020139801 U CN201020139801 U CN 201020139801U CN 201667714 U CN201667714 U CN 201667714U
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- Prior art keywords
- resonant cavity
- piezo
- piezoelectric element
- electric loudspeaker
- inlet side
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Abstract
The utility model relates to a piezoelectric type loudspeaker, which is mainly characterized in that a resonant cavity is provided with an inlet side and an outlet side, wherein the inlet side is formed with an open pore and is provided with a piezoelectric element, whereas the outlet side is formed with a cover plate. The loudspeaker generates vibration by the mechanical deformation of the piezoelectric element to send out sound waves, and moreover, the sound waves are magnified due to generating resonance in the resonant cavity, and then the magnified sound waves are conducted out of an external sound field. A waterproof layer is further coated on the surface of the piezoelectric element, and thereby, the loudspeaker can be prevented from being damaged due to being affected with damp.
Description
[technical field]
The utility model is about a kind of piezo-electric loudspeaker, particularly about a kind of piezo-electric loudspeaker with waterproof construction.
[background technology]
Along with science and technology progress with rapid changepl. never-ending changes and improvements, different types of loud speaker is seen everywhere in the daily life, and loud speaker mainly is a kind of electroacoustic transducer, it is converted into acoustic energy to electric energy by certain physical effect, and at the loud speaker of different purposes and many different types are arranged, as piezo-electric loudspeaker, electromagnetic loudspeaker, condenser loudspeaker, dynamic speaker etc.
Piezo-electric loudspeaker (piezoelectric loudspeakers) is a kind of loud speaker that utilizes piezoelectric effect that piezoelectric element (piezoelectric elements) produces as the driving thrust source of sound wave, can be used to produce the sound wave of common people's ear institute energy receive frequency range.Above-mentioned piezoelectric effect is exactly that piezoelectric element can produce flexural deformation when piezoelectric element is fed certain voltage; When the input voltage signal enters upper and lower two surfaces of piezoelectric element by little and the earth, because the cause of piezoelectric effect, piezoelectric element will produce mechanical deformation radially, and then produce the flexural deformation of above-below direction, cause the shape of piezoelectric element to become convex surface by the plane; When the input voltage signal is reverse; the shape of piezoelectric element then is transformed into concave surface; and when piezoelectric element is switched on constantly; piezoelectric element will send sound wave thereupon producing deformation vibration; and, can on the surface of piezoelectric element, be stained with sheet metal usually for the effect that further makes mechanical strain enlarges.In addition, also piezoelectric element can be stained with dull and stereotyped or conical vibrating diaphragm (diaphragm), vibrating diaphragm is as sounding component whereby.
Generally be applied to outdoor piezo-electric loudspeaker, as siren, blow a whistle, car horn and outdoor radio etc., often because of the fabric of island-in-sea type in Taiwan have a humid climate rainy so, and cause the piezoelectric element of above-mentioned loud speaker to make moist and fault.
The above person is that known piezo-electric loudspeaker is not attained desirable place.This shows that existing piezo-electric loudspeaker is real to be needed to be further reviewed, and seeks feasible solution.
[utility model content]
Therefore, the utility model main purpose is to provide a kind of piezo-electric loudspeaker with waterproof construction.
For reaching the major technique means that aforementioned purpose takes is to make aforementioned piezo-electric loudspeaker include:
One resonant cavity has an inlet side and an outlet side, and its inlet side is formed with a perforate, then is formed with a cover plate on the outlet side;
One piezoelectric element be located at the inlet side of this resonant cavity, and this piezoelectric element surface is coated with a watertight composition.
Accept above-mentionedly, the utility model provides a kind of piezo-electric loudspeaker, it is characterized in that: include:
One resonant cavity has an inlet side and an outlet side, and resonant cavity central authorities are formed with a perforate, then is formed with a cover plate on this outlet side;
One piezoelectric element be located at the inlet side of this resonant cavity, and this piezoelectric element surface is coated with a watertight composition.
Described piezo-electric loudspeaker is characterized in that: be formed with the wavy protrusion of a circular arc between the outside enclosure wall of this resonant cavity outlet side and the central openings.
Described piezo-electric loudspeaker is characterized in that: extend to form many extending columns towards the outlet side direction on the protrusion of this resonant cavity, each extending column is terminal to be connected with a round sheet cover plate.
Described piezo-electric loudspeaker is characterized in that: on the medial surface of this cover plate to should perforate and the protrusion place be formed with a recess and annular groove respectively, this notch depth is a convergent from inside to outside, and the annular groove of this cover plate periphery is to be the arc depression shape.
Described piezo-electric loudspeaker is characterized in that: the perforate aperture of this resonant cavity is by its inboard convergent of inlet side lateral.
Described piezo-electric loudspeaker is characterized in that: this piezoelectric element is rounded laminar and be located at the inlet side outside of this resonant cavity.
Described piezo-electric loudspeaker is characterized in that: stickingly on the outer surface of this piezoelectric element be provided with a ring-like sheet metal, and be provided with a metal solder joint in sheet metal, for welding lead.
Described piezo-electric loudspeaker is characterized in that: this piezoelectric element is to be located in the inlet side of this resonant cavity, and is covered by this circle enclosing cover.
Aforementioned piezo-electric loudspeaker can utilize the structure of resonant cavity on it; the mechanical deformation of borrowing piezoelectric element to produce produces vibrations and sends sound wave; and make sound wave in resonant cavity, produce resonance and amplify; the outside sound field of acoustic duct pass-out after will amplifying then; moreover the watertight composition design of this piezoelectric element can be protected this piezo-electric loudspeaker to avoid making moist and damage.
[description of drawings]
Fig. 1 a: exploded view that is the utility model preferred embodiment.
Fig. 2 a: cutaway view that is the utility model preferred embodiment.
Fig. 3: a thin portion end view that is the utility model preferred embodiment.
(10) resonant cavity (11) inlet side
(12) outlet side (13) perforate
(14) protrusion (15) extending column
(16) cover plate (17) recess
(18) annular groove (20) piezoelectric element
(21) sheet metal (22) solder joint
(23) lead (24) watertight composition
(25) enclosing cover
[embodiment]
The preferred embodiment of one of relevant the utility model, at first please refer to shown in Figure 1, mainly be to make a piezo-electric loudspeaker be formed by a resonant cavity 10 and a piezoelectric element 20, generally be a circle box type by what its outward appearance was looked, wherein, this resonant cavity 10 is formed with an inlet side 11 in an end, then be formed with another outlet side 12 in these resonant cavity 10 other ends, and these resonant cavity 10 centers are formed with a saturating empty round hole 13, these perforate 13 apertures by inlet side 11 towards outlet side 12 convergents, and be formed with the wavy protrusion 14 of a circular arc between gusset wall and the central openings 13 outside these resonant cavity 10 outlet sides 12, extend to form three extending columns 15 towards outlet side 12 directions on the protrusion 14 of this resonant cavity 10, each extending column 15 end is to be connected with a round sheet cover plate 16, please refer to shown in Figure 2, on the medial surface of this cover plate 16 then to should perforate 13 being formed with a recess 17 and annular groove 18 respectively with protrusion 14 places, these recess 17 degree of depth are convergents from inside to outside, and the annular groove 18 of these cover plate 16 peripheries is to be the arc depression shape.The inlet side 11 of resonant cavity 10 is provided with a circular enclosing cover 25 again, and forms an accommodation space betwixt.
This piezoelectric element 20 is rounded laminar and be located at inlet side 11 outsides of this resonant cavity 10, please refer to Fig. 2 and shown in Figure 3 again, in order to strengthen and to enlarge the sound wave effect that this piezoelectric element 20 is produced, then on the outer surface of this piezoelectric element 20, glue and be provided with a ring-like sheet metal 21, and be provided with a metal solder joint 22 in sheet metal 21, usefulness for welding lead 23, in addition, these piezoelectric element 20 surfaces be coated with one can moistureproof moisture-resistant watertight composition 24, further again this piezoelectric element 20 is glued and are located in the inlet side 11 of this resonant cavity 10, and covered by this circle enclosing cover 25.
Aforementioned piezo-electric loudspeaker can cause the air vibrations in the resonant cavity 10 and send sound wave by the mechanical deformation that piezoelectric element 20 produces; and the reflex of cover plate 16 makes sound wave produce resonance in resonant cavity 10 and amplifies; and anti-phase 180 degree of the sound wave that piezo-electric loudspeaker is sent; by the protrusion 14 of resonant cavity 10 this part sound wave is done to transmit for the second time again and conducting goes out outside sound field; so that the sound wave homophase that this part sound wave and piezo-electric loudspeaker directly send; to enlarge the sound wave effect that this piezoelectric element 20 is produced; in addition, the design of the watertight composition of this piezoelectric element 20 can be protected this piezo-electric loudspeaker to avoid making moist and damage.
Claims (8)
1. piezo-electric loudspeaker is characterized in that: include:
One resonant cavity has an inlet side and an outlet side, and resonant cavity central authorities are formed with a perforate, then is formed with a cover plate on this outlet side;
One piezoelectric element be located at the inlet side of this resonant cavity, and this piezoelectric element surface is coated with a watertight composition.
2. piezo-electric loudspeaker as claimed in claim 1 is characterized in that: be formed with the wavy protrusion of a circular arc between the outside enclosure wall of this resonant cavity outlet side and the central openings.
3. piezo-electric loudspeaker as claimed in claim 2 is characterized in that: extend to form many extending columns towards the outlet side direction on the protrusion of this resonant cavity, each extending column is terminal to be connected with a round sheet cover plate.
4. piezo-electric loudspeaker as claimed in claim 3, it is characterized in that: on the medial surface of this cover plate to should perforate and the protrusion place be formed with a recess and annular groove respectively, this notch depth is a convergent from inside to outside, and the annular groove of this cover plate periphery is to be the arc depression shape.
5. piezo-electric loudspeaker as claimed in claim 4 is characterized in that: the perforate aperture of this resonant cavity is by its inboard convergent of inlet side lateral.
6. piezo-electric loudspeaker as claimed in claim 5 is characterized in that: this piezoelectric element is the rounded sheet and the inlet side of being located at this resonant cavity outside.
7. piezo-electric loudspeaker as claimed in claim 6 is characterized in that: stickingly on the outer surface of this piezoelectric element be provided with a ring-like sheet metal, and be provided with a metal solder joint in sheet metal, for welding lead.
8. piezo-electric loudspeaker as claimed in claim 7 is characterized in that: this piezoelectric element is to be located in the inlet side of this resonant cavity, and is covered by this circle enclosing cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201398013U CN201667714U (en) | 2010-03-12 | 2010-03-12 | Piezoelectric type loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201398013U CN201667714U (en) | 2010-03-12 | 2010-03-12 | Piezoelectric type loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201667714U true CN201667714U (en) | 2010-12-08 |
Family
ID=43268676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201398013U Expired - Lifetime CN201667714U (en) | 2010-03-12 | 2010-03-12 | Piezoelectric type loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201667714U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104936086A (en) * | 2015-06-09 | 2015-09-23 | 郭斌 | Moisture-proof loudspeaker |
| CN106060702A (en) * | 2016-06-14 | 2016-10-26 | 常州市武进晶丰电子有限公司 | Multifunctional piezoelectric horn |
| WO2019186305A1 (en) * | 2018-03-24 | 2019-10-03 | RAMCHANDRAN, Shankar Trichur | Transducer assembly |
-
2010
- 2010-03-12 CN CN2010201398013U patent/CN201667714U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104936086A (en) * | 2015-06-09 | 2015-09-23 | 郭斌 | Moisture-proof loudspeaker |
| CN106060702A (en) * | 2016-06-14 | 2016-10-26 | 常州市武进晶丰电子有限公司 | Multifunctional piezoelectric horn |
| WO2019186305A1 (en) * | 2018-03-24 | 2019-10-03 | RAMCHANDRAN, Shankar Trichur | Transducer assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101208 |
|
| CX01 | Expiry of patent term |