CN2812463Y - Reflection bowl type piezoelectric loudspeaker - Google Patents
Reflection bowl type piezoelectric loudspeaker Download PDFInfo
- Publication number
- CN2812463Y CN2812463Y CN 200520025617 CN200520025617U CN2812463Y CN 2812463 Y CN2812463 Y CN 2812463Y CN 200520025617 CN200520025617 CN 200520025617 CN 200520025617 U CN200520025617 U CN 200520025617U CN 2812463 Y CN2812463 Y CN 2812463Y
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- sound
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- shell
- piezoelectric ceramic
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Abstract
The utility model discloses a reflection bowl type piezoelectric loudspeaker which comprises a piezoelectric ceramic plate, a shell and a bottom cap. The inner side of the bottom of the shell is coaxially provided with a circular piezoelectric ceramic plate, and the space between the upper surface of the circular piezoelectric ceramic plate and the shell bottom forms a front energy gathering cavity. The upper center position of the shell is provided with a raised sound outlet conduit and a sound outlet, and the bottom cap is adhered on the lower curling of the shell to isolate reversal acoustic radiation. The piezoelectric ceramic is vibrated by an input audio voltage signal, and sound energy is reflected and gathered in the front energy gathering cavity. The sound energy penetrates through the sound outlet and an annular reflection bowl type sound guidance system, and sound is spread by an air medium. The piezoelectric loudspeaker has the advantages of small volume, big sound, low energy consumption and high reliability, and the sound performance coincides with the specification of Chinese national standard. The utility model is particularly suitable for various modern alarm devices. The utility model not only can be arranged on a panel but also can be arranged in an alarm device.
Description
Technical field
The utility model belongs to a kind of electro-acoustic element.Specifically, it relates to the piezoelectric speaker that is used in specially on the modern various alarm.
Technical background
Along with the needs of social real-life, no matter alarm all is installed in office, family, bank, automobile industry, Advanced Concepts Laboratory various aspects, it is the indispensable device of the safety precaution theft and the accident of divulging a secret.Development in science and technology in recent years, the technology content of alarm self design and user's requirement are more and more higher, in order to satisfy the requirement in market, obviously, it as loud speaker one of vitals of alarm apparatus, therefore, the loudspeaker design manufacture level has been proposed more fully requirement, at present, the defective of conventional loudspeakers is: (one) generally adopts the coil-moving speaker structure, its volume is big, complex process, cost height, electro-acoustic conversion efficiency are low, is contained in disguised extreme difference on the alarm; (2) though the loud speaker manufacturing firm that has improves conventional loudspeakers in design, and volume has reduced, and acoustic performance does not reach requirement,, frequency influence narrow range little as volume, alarm work deterrent force are poor; (3) be worth the existing loadspeaker structure form of proposition and feature to be unsuitable for being installed on the alarm of innovation or special purpose especially, its design has been brought restriction, in sum, it is very urgent to improve loudspeaker design.
Summary of the invention
The purpose of the utility model development be to provide a kind of volume little, give great volume, install easily, low power consumption, acoustic performance meets national standard, and is adapted to the reverberation bowl type piezoelectric speaker on the novel or special purpose alarm of various modern times.
The utility model is realized by following step: see accompanying drawing 1, it comprises circular piezoelectric potsherd (1), it is characterized in that: inner coaxial installation round ceramic sheet (1) in housing (2) bottom surface, the space forms energy collecting ante-chamber A above it and between housing (2) bottom surface, housing (2) central upper portion position is lobed to go out acoustic conducting pipe, outlet sound mouth is B up, looping reverberation bowl C between justifying around its cylindrical and in housing (2) top, bottom (3) is bonded on the round edge of housing (2) bottom section, constitutes back cavity; Circular piezoelectric potsherd (1) welds out two audio frequency feeder line D1, D2 and is used to import audio voltage signal driving piezoelectric ceramic piece (1) vibration, promotes the air medium sounding.
Form annular reflection bowl C around outlet sound mouth B cylindrical and in housing (2) top between the circle, its bottom surface is the plane, still sees accompanying drawing (1).
Advantage of the present utility model and good effect, (1) this loud speaker is to design with piezoelectric speaker for modern novel alarm specially, it is little to have volume, and diameter is 29.5mm, highly for 16.5mm, on the face version that is embedded in alarm rational in infrastructure or assemble its inside.(2) the sensitive height of high its product sound of volume is not less than 105dB, deterrent force is arranged behind the alarm work very much, and current sinking is little, and (three) frequency range is 1.5KHz～20KHz, meets fully in alarm requirement and the national standard and stipulates.(4) production technology is simple, cost is low, reliability is high, is specially adapted to various alarms and uses.
Description of drawings
Fig. 1 is the utility model piezoelectric speaker assembling section and sound travel principle schematic, and wherein: 1 for circular piezoelectric potsherd, 2 is that housing, 3 is that bottom, A are that energy collecting ante-chamber, B are that outlet sound mouth, C are the annular reflection bowl, and D1, D2 are feeder line.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further, see accompanying drawing 1, (one) is lobed in housing 2 central upper portion positions to go out acoustic conducting pipe, and outlet sound mouth is B up, its bore is less than the wave length of sound of radiation, and its outlet sound mouth B can think a non-direction point sound source.The sound wave that outlet sound mouth B sends is except to previous irradiation, and to the sound wave of annular reflection bowl C radiation after reflection, but some is also to previous irradiation, when reflected wave is identical with the direct wave phase place or close, can strengthen the energy of radiative acoustic wave forward.Suitably regulate the height of outlet sound mouth B, can obtain being applicable to the needed high sound pressure level radiation of particular frequency range; (2) still see accompanying drawing 1, bottom 3 is bonded on the round edge of housing 2 bottom sections and constitutes back cavity, can play the effect of isolation from the anti-phase sound wave of circular piezoelectric potsherd 1 back side radiation; (3) loud speaker energy collecting ante-chamber A as shown in Figure 1 highly is 3mm; (4) circular piezoelectric potsherd 1 is by the metal pole piece with potsherd is two-layer bonded is integral, after the assembling of the utility model loud speaker, through two audio frequency feeder line inputs of D1, D2 audio voltage signal, make 1 vibration of circular piezoelectric potsherd, acoustic energy after reflection is gathered, is sounded by the air medium propagation to system by outlet sound mouth B and annular reflection bowl C acoustic conductance in ante-chamber; (5) the soft balsam stick is all adopted in all abutting edges of the utility model piezoelectric speaker in sum; Described housing 2, bottom 3 all adopt the manufacturing of ABS engineering plastics, to guarantee reliability of products.
Claims (2)
1 reverberation bowl type piezoelectric speaker, it comprises circular piezoelectric potsherd (1), it is characterized in that: inner coaxial installation round ceramic sheet (1) in housing (2) bottom surface, the space forms energy collecting ante-chamber (A) above it and between housing (2) bottom surface, housing (2) central upper portion position is lobed to go out acoustic conducting pipe, outlet sound mouth is (B) up, looping reverberation bowl (C) between justifying around its cylindrical and in housing (2) top, bottom (3) is bonded on the round edge of housing (2) bottom section, constitutes back cavity; Circular piezoelectric potsherd (1) welds out two audio frequency feeder lines (D1), (D2), and the input audio voltage signal drives piezoelectric ceramic piece (1) vibration, promotes the air medium sounding.
2 according to the described loud speaker of claim 1, it is characterized in that: form the reverberation bowl (C) that goes in ring around outlet sound mouth (B) cylindrical and in housing (2) top between the circle, its bottom surface is the plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520025617 CN2812463Y (en) | 2005-04-19 | 2005-04-19 | Reflection bowl type piezoelectric loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520025617 CN2812463Y (en) | 2005-04-19 | 2005-04-19 | Reflection bowl type piezoelectric loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2812463Y true CN2812463Y (en) | 2006-08-30 |
Family
ID=36938846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520025617 Expired - Fee Related CN2812463Y (en) | 2005-04-19 | 2005-04-19 | Reflection bowl type piezoelectric loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2812463Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103220605A (en) * | 2012-01-20 | 2013-07-24 | 新昌有限公司 | Vibrating type horn |
| WO2016150216A1 (en) * | 2015-03-25 | 2016-09-29 | 歌尔声学股份有限公司 | Speaker module |
| CN106454656A (en) * | 2016-10-10 | 2017-02-22 | 宁波东方电子有限公司 | Sound production cavity structure for smoke alarm |
-
2005
- 2005-04-19 CN CN 200520025617 patent/CN2812463Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103220605A (en) * | 2012-01-20 | 2013-07-24 | 新昌有限公司 | Vibrating type horn |
| WO2016150216A1 (en) * | 2015-03-25 | 2016-09-29 | 歌尔声学股份有限公司 | Speaker module |
| US10299030B2 (en) | 2015-03-25 | 2019-05-21 | Goertek Inc. | Speaker module with sealed cavity and a communicating hole |
| CN106454656A (en) * | 2016-10-10 | 2017-02-22 | 宁波东方电子有限公司 | Sound production cavity structure for smoke alarm |
| CN106454656B (en) * | 2016-10-10 | 2022-03-22 | 宁波东方电子有限公司 | Sounding cavity structure of smoke alarm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060830 Termination date: 20130419 |