CN203675320U - Piezoelectric loudspeaker - Google Patents
Piezoelectric loudspeaker Download PDFInfo
- Publication number
- CN203675320U CN203675320U CN201320856154.1U CN201320856154U CN203675320U CN 203675320 U CN203675320 U CN 203675320U CN 201320856154 U CN201320856154 U CN 201320856154U CN 203675320 U CN203675320 U CN 203675320U
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- China
- Prior art keywords
- piezoelectric
- vibration
- arm
- loudspeaker
- sound film
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- Expired - Lifetime
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- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 239000012528 membrane Substances 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000013016 damping Methods 0.000 claims description 3
- 230000001413 cellular effect Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 230000005855 radiation Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
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- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
Provided is a piezoelectric loudspeaker which comprises a basin stand, a voice diaphragm, and a piezoelectric vibrating unit. The voice diaphragm is mounted on the basin stand. The piezoelectric vibrating unit is mounted in the basin stand and is arranged under the voice diaphragm. The piezoelectric vibrating unit comprises a piezoelectric vibrating arm and a rigid vibration transmission arm. The left tail end of the piezoelectric vibrating arm is embedded in the left sidewall of the basin stand. The bottom end of the rigid vibration transmission arm is arranged on the right tail end of the piezoelectric vibrating arm. The top end of the rigid vibration transmission arm is pasted on the voice diaphragm. The piezoelectric vibrating unit may provide vibration amplitude required by the loudspeaker in low-frequency radiation in order to resolve a problem of low sensitivity caused by the excessive low vibration amplitude of a conventional piezoelectric vibrator. Thus, the piezoelectric loudspeaker may achieve narrow and long thinning and microminiaturization and the low-frequency sensitivity of the piezoelectric loudspeaker is improved.
Description
Technical field
The utility model relates to a kind of piezoelectric loudspeaker.
Background technology
At present, known long narrow super-thin speaker can be divided into two classes: the long narrow Ultrathin electric type loud speaker that the first is traditional, its principle of sound is when tone currents is when hanging on the voice coil loudspeaker voice coil in fixed magnetic field, and voice coil loudspeaker voice coil is stressed and move, thereby swashs tibial membrane vibration sounding.This loud speaker must have a magnetic circuit that power source is provided, and just the size of this magnetic circuit and weight limits the further ultrathin of this type of loud speaker, long narrowization and miniaturization.It two is loud speakers of piezo-electric type, and its principle of sound is that piezoelectric vibrator is because inverse piezoelectric effect is vibrated and then sharp tibial membrane vibration sounding when tone currents is by piezoelectric vibrator.The loud speaker of current known piezo-electric type can be subdivided into three classes: Piezoelectric, piezoelectric membrane type, piezo-electricity composite material and piezoelectricity new material type.Current Piezoelectric loud speaker has been subject to the restriction of the intrinsic physical property of piezoelectric ceramic, that is exactly that piezoelectric ceramic is frangible, itself be difficult to provide loud speaker needed enough large amplitudes by piezoelectric ceramic vibration, so also do not have the piezoelectric loudspeaker that LF-response is good to occur at present.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is intended to provide a kind of piezoelectric loudspeaker, and it can make the long narrow ultrathin of loud speaker and improve sensitivity microminiaturized time and optimize LF-response.
For achieving the above object, the utility model adopts following technical scheme:
A kind of piezoelectric loudspeaker, it comprises basin frame, sound film and piezoelectric vibration unit; This sound film is installed on this basin frame; This piezoelectric vibration cellular installation is in this basin frame and be positioned at this sound film below; It is characterized in that: this piezoelectric vibration unit comprises piezoelectric vibration arm and rigidity vibration transmission arm, the left-end point of this piezoelectric vibration arm is flush-mounted in the left side wall of this basin frame, the right end of this piezoelectric vibration arm is located in the lower end that arm is transmitted in this rigidity vibration, and keep out on this sound film the upper end that arm is transmitted in this rigidity vibration.
Further, this piezoelectric vibration arm comprises piezoelectric patches, lower piezoelectric sheet and resilient support arms, upper piezoelectric patches and lower piezoelectric sheet are mounted on respectively upper surface and the lower surface of this resilient support arms, the left-end point of this resilient support arms is flush-mounted in the left side wall of this basin frame, this rigidity vibration is transmitted arm and is extended from the oblique upper left side of right end of this resilient support arms, the end that arm is transmitted in this rigidity vibration upwards vertically extends to form one and touches portion, and this tactile portion is adhered on this sound film.
Further, also involving vibrations balance element of this piezoelectric vibration arm, this vibration balancing part is connected in this rigidity vibration and transmits between the tactile portion and this sound film of arm.
Further, this vibration balancing part is positioned at the middle part of this sound film.
Further, hollow in this vibration balancing part, fills damping material internal layer in it.
Further, this vibration balancing part is tabular.
Further, on this, piezoelectric patches and lower piezoelectric sheet are piezoelectric ceramic piece or piezoelectric membrane sheet.
Further, the upper surface of this resilient support arms and lower surface are respectively offered the arc groove of the strip of a broad ways extension, and two arc grooves are distributed in the left end of this resilient support arms relatively.
Further, this sound film is installed on this basin frame by ring.
The beneficial effects of the utility model are as follows:
Needed vibration amplitude when the piezoelectric vibration unit of above-mentioned utility model can provide loud speaker low frequency radiation, to solve the too small sensitivity being caused of existing piezoelectric vibrator vibration amplitude problem on the low side, make this piezoelectric loudspeaker can realize long narrow ultrathin and microminiaturization, improve its low-frequency sensitive degree simultaneously.
Brief description of the drawings
Fig. 1 is the stereogram of the preferred embodiments of the utility model piezoelectric loudspeaker.
Fig. 2 is the profile of the piezoelectric loudspeaker of Fig. 1.
Fig. 3 is the resilient support arms of piezoelectric loudspeaker and the connection stereogram of rigidity vibration transmission arm of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
Refer to Fig. 1 to Fig. 3, the utility model relates to a kind of piezoelectric loudspeaker, and its preferred embodiments comprises basin frame 10, sound film 20 and piezoelectric vibration unit 30.
This sound film 20 is installed on this basin frame 10 by ring 40.This piezoelectric vibration unit 30 is installed in this basin frame 10 and is positioned at this sound film 20 belows.
This piezoelectric vibration unit 30 comprises piezoelectric patches 34, lower piezoelectric sheet 33, resilient support arms 32, rigidity vibration transmission arm 31 and vibration balancing part 35.Upper piezoelectric patches 34 and lower piezoelectric sheet 33 are mounted on respectively upper surface and the lower surface of this resilient support arms 32.The left-end point of this resilient support arms 32 is flush-mounted in the left side wall of this basin frame 10, this rigidity vibration is transmitted arm 31 and is extended from the oblique upper left side of right end of this resilient support arms 32, have angle to make this rigidity vibration transmit structure between arm 31 and this fixation wall 32, the end that arm 31 is transmitted in this rigidity vibration upwards vertically extends to form one and touches portion, this tactile portion connects the lower end of this vibration balancing part 35, and the upper end of this vibration balancing part 35 connects this sound film 20.This vibration balancing part 35 is conducive to balance sound film quality, and the application point of balance excitation force and direction are improved stress and concentrated.In the time that this vibration balancing part 35 is positioned at the middle part of this sound film 20, can make sound vibration of membrane more even, tone color is better.
This piezoelectric patches 34, lower piezoelectric sheet 33 and resilient support arms 32 form a piezoelectricity and raise one's arm, in the time that voltage supply piezoelectricity is raised one's arm, piezoelectricity is raised one's arm and will be followed the vibration of voltage swing generation respective frequencies and corresponding amplitude, this rigidity vibration is transmitted arm 31 and can more delicately vibration be passed to sooner to this sound film 20, this rigidity vibration is transmitted arm 31 and can be solved the too small problem of existing piezoelectric vibrator amplitude, overcome existing piezoelectric vibrator sensitivity problem on the low side, and then make this loud speaker can obtain the needed Oscillation Amplitude of low frequency, thereby make this loud speaker realize long narrow ultrathin and improve its sensitivity microminiaturized time.
The upper surface of this resilient support arms 32 and lower surface are respectively offered the arc groove of the strip of a broad ways extension, two arc grooves are distributed in the left end of this resilient support arms 32 relatively, in the time of the right-hand member up-down vibration of this resilient support arms 32, two arc grooves can make this resilient support arms 32 swing up and down certain angle around left-end point, reduce the interference effect of the amplitude to resilient support arms 32.
In other embodiment, the lower surface of this sound film 20 is laid reinforced bar net, and it is one-body molded with this reinforced bar net that arm 31 is transmitted in this rigidity vibration.
This vibration balancing part 35 can be the tabular of hollow, fills damping material internal layer and can make vibration balancing part 35 possess the function of damper simultaneously in it.
For a person skilled in the art, can be according to technical scheme described above and design, make other various corresponding changes and distortion, and these all changes and distortion all should belong to the protection range of the utility model claim within.
Claims (9)
1. a piezoelectric loudspeaker, it comprises basin frame, sound film and piezoelectric vibration unit; This sound film is installed on this basin frame; This piezoelectric vibration cellular installation is in this basin frame and be positioned at this sound film below; It is characterized in that: this piezoelectric vibration unit comprises piezoelectric vibration arm and rigidity vibration transmission arm, the left-end point of this piezoelectric vibration arm is flush-mounted in the left side wall of this basin frame, the right end of this piezoelectric vibration arm is located in the lower end that arm is transmitted in this rigidity vibration, and keep out on this sound film the upper end that arm is transmitted in this rigidity vibration.
2. piezoelectric loudspeaker as claimed in claim 1, it is characterized in that: this piezoelectric vibration arm comprises piezoelectric patches, lower piezoelectric sheet and resilient support arms, upper piezoelectric patches and lower piezoelectric sheet are mounted on respectively upper surface and the lower surface of this resilient support arms, the left-end point of this resilient support arms is flush-mounted in the left side wall of this basin frame, this rigidity vibration is transmitted arm and is extended from the oblique upper left side of right end of this resilient support arms, the end that arm is transmitted in this rigidity vibration upwards vertically extends to form one and touches portion, and this tactile portion is adhered on this sound film.
3. piezoelectric loudspeaker as claimed in claim 2, is characterized in that: also involving vibrations balance element of this piezoelectric vibration arm, this vibration balancing part is connected in this rigidity vibration and transmits between the tactile portion and this sound film of arm.
4. piezoelectric loudspeaker as claimed in claim 2, is characterized in that: this vibration balancing part is positioned at the middle part of this sound film.
5. piezoelectric loudspeaker as claimed in claim 2, is characterized in that: hollow in this vibration balancing part, in it, fill damping material internal layer.
6. piezoelectric loudspeaker as claimed in claim 2, is characterized in that: this vibration balancing part is tabular.
7. piezoelectric loudspeaker as claimed in claim 2, is characterized in that: on this, piezoelectric patches and lower piezoelectric sheet are piezoelectric ceramic piece or piezoelectric membrane sheet.
8. piezoelectric loudspeaker as claimed in claim 2, is characterized in that: the upper surface of this resilient support arms and lower surface are respectively offered the arc groove of the strip of a broad ways extension, and two arc grooves are distributed in the left end of this resilient support arms relatively.
9. piezoelectric loudspeaker as claimed in claim 1, is characterized in that: this sound film is installed on this basin frame by ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320856154.1U CN203675320U (en) | 2013-12-23 | 2013-12-23 | Piezoelectric loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320856154.1U CN203675320U (en) | 2013-12-23 | 2013-12-23 | Piezoelectric loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203675320U true CN203675320U (en) | 2014-06-25 |
Family
ID=50971564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320856154.1U Expired - Lifetime CN203675320U (en) | 2013-12-23 | 2013-12-23 | Piezoelectric loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203675320U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111356065A (en) * | 2018-12-20 | 2020-06-30 | 北京小米移动软件有限公司 | Sound production module and electronic equipment |
-
2013
- 2013-12-23 CN CN201320856154.1U patent/CN203675320U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111356065A (en) * | 2018-12-20 | 2020-06-30 | 北京小米移动软件有限公司 | Sound production module and electronic equipment |
| CN111356065B (en) * | 2018-12-20 | 2021-12-28 | 北京小米移动软件有限公司 | Sound production module and electronic equipment |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140625 |