CN1222048A - Speaker - Google Patents
Speaker Download PDFInfo
- Publication number
- CN1222048A CN1222048A CN98107352A CN98107352A CN1222048A CN 1222048 A CN1222048 A CN 1222048A CN 98107352 A CN98107352 A CN 98107352A CN 98107352 A CN98107352 A CN 98107352A CN 1222048 A CN1222048 A CN 1222048A
- Authority
- CN
- China
- Prior art keywords
- base part
- loud speaker
- oscillating component
- component
- drive electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 230000010287 polarization Effects 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/127—Non-planar diaphragms or cones dome-shaped
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/023—Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
A method of making a speaker with a semi-spherical vibration section and a ringed plate-like base section is disclosed. The vibration section and the base section are formed as a single, unitary piezoelectric body. Driving electrodes are located on the single unitary body comprising the vibration section and the base section. The driving electrodes are connected with lead electrodes and the lead electrodes are connected with connecting terminals.
Description
The application is the part continuation application of the U.S. Patent application 08/760,939 in the examination.
The present invention relates to comprise the loud speaker that is essentially hemispheric piezoelectric ceramic part, relate in particular to configuration example as employed super high pitch loudspeaker in reproducing DVD audio frequency or superaudio CD.
In 08/760, No. 639 U.S. Patent application (it is the patent application of this part continuation application), disclosed the piezoelectric ceramic loudspeaker that relates to loud speaker described here.Loud speaker described in 08/760, No. 639 U.S. Patent application has oscillating component that the hemisphere piezoelectrics make and constitutes with base part (these two parts are formed by different materials respectively) by the connection oscillating component.Oscillating component is installed on the base part, has placed insulating material therebetween.
Owing to assign to constitute this relevant loud speaker by using adhesive to connect the oscillating component that constitutes by different materials respectively with base portion, thereby the acoustic characteristic of production efficiency and voice output is so uneven as desired or quality is high.In addition, because the vibration of the profile of hemisphere end face, in the only about half of high order harmonic component pattern that causes as parasitic hemisphere piezoelectrics of fundamental resonance frequency.In addition; though base part must have insulating material because of holding splicing ear; but base part also needs bigger thickness usually, because usually the proportion of the base part of being made by synthetic resin is too little, can cause to stretch or depression during base part is molded.
In order to overcome the problems referred to above, preferred embodiment of the present invention provides a kind of loud speaker, and this loud speaker is suitable for and constitutes and can enhance productivity, thereby obtains voice output even basically and that have good acoustic characteristic.
According to one embodiment of the present of invention, a kind of loud speaker comprises the hemisphere oscillating component, is used to make the drive electrode of oscillating component vibration and the base part that is used for fixing oscillating component, and wherein oscillating component and base part comprise Unitarily molded piezoelectrics.
When the signal of telecommunication is input to drive electrode, oscillating component vibrate because of piezoelectric effect and from the loud speaker of foundation preferred embodiment of the present invention the crooked semispherical surface of vibrating body send sound wave.Because the semi-spherical shape of vibrating body, sound wave be by theaomni-directional transmission, and be not only limited in the loud speaker of prior art the sound wave emission of general certain direction.
Because oscillating component and base part are molded as the piezoelectric material body of single integral body, need step and material that oscillating component and base part are bonded to each other together in the loud speaker of correlation technique so eliminated.So, reduced number and the manufacturing and the installation step of parts, and simplified and improved production efficiency.In addition, utilize the new construction of preferred embodiment of the present invention,, thereby improved the acoustic characteristic of loud speaker because of the overall structure of oscillating component and base part has suppressed the profile vibration of higher modes.
Molded and formation oscillating component and base part preferably like this, thus make their relative weight ratio be about 1: 5 to about 1: 20, with the acoustic characteristic of raising loud speaker.Especially, the present inventor is definite, when the profile vibration mode of the semispherical surface that suppresses vibrating body as much as possible, has improved the acoustic characteristic of loud speaker of the present invention widely.The inventor also determines, the fixing outer rim of the crooked semispherical surface of vibrating body is to suppress the profile vibration mode of vibrating body.Yet the inventor finds, during the vibration of the base part of loud speaker, the acoustic characteristic of loud speaker can change when for example the outer rim of the crooked semispherical surface of loudspeaker body being fixed in such as the loudspeaker box supporting member.By molded oscillating component like this and base part, thereby make their relative weight ratio be about 1: 5 to about 1: 20, can solve the problem of loud speaker acoustic characteristic variation and can realize even and high-quality acoustic characteristic.
In addition, preferably drive electrode is arranged on the surface of oscillating component and the part of drive electrode is extended on the base part.The result who places drive electrode like this is, is positioned at the lip-deep drive electrode of oscillating component and extends on the base part by making, and is easier to being connected of electrode and external circuit.
Loud speaker in base part, preferably also forms notch or hole is installed, so that can be attached to such as housing or casing supporting member.
From following detailed description, will these and other elements, the feature and advantage of preferred embodiment of the present invention be become obviously to preferred embodiment of the present invention shown in the accompanying drawing.
Fig. 1 is the perspective view that illustrates according to an example of a preferred embodiment of loud speaker of the present invention.
Fig. 2 is the profile along II among Fig. 1-II line.
In preferred embodiment of the present invention shown in Fig. 1 and Fig. 2, Fig. 1 is the perspective view according to the loud speaker of preferred embodiment of the present invention, and Fig. 2 is the profile along II among Fig. 1-II line.
In an example, it is that about 20mm, thickness are the size of about 0.5mm that oscillating component 12 is preferably formed as diameter, and it is that about 60mm, thickness are the size of about 5mm that base part 14 is preferably formed as diameter.
For example, when being preferably in molded base part 14,, forming in a plurality of positions of predetermined space notches or recess 16 are installed along the circumferencial direction of base part 14 peripheral edge portions.Notch 16 feasible being convenient to are installed base part 14 is fixed to the support component that separates such as housing or bracing frame etc.Can be by loud speaker being fixed in this support component such as fixed part (not shown) such as screws.Notice that shape, position and number that notch 16 is installed are not limited to shown in Fig. 1.For example, the through hole that can form Any shape in base part 14 plays the effect of installing hole 16.
In a kind of preferred approach of manufacturing according to the loud speaker of preferred embodiment of the present invention, piezoelectrics such as use pottery carry out pressing mold or injection molding to oscillating component 12 and base part 14, carry out sintering thereafter.In this manufacturing step, can form notch 16.In case when forming involving vibrations part 12, base part 14 and notch 16 (if desired) whole, can as described belowly add top electrode.
The drive electrode 18 that is used to make oscillating component 12 vibration is placed the crooked outer surface of hemisphere oscillating component 12, drive electrode 20 is placed on the inner surface of hemisphere oscillating component 12.That is, so place drive electrode 18 and drive electrode 20, thereby make them relative, oscillating component 12 is therebetween along its thickness direction.In addition, an end of strip extraction electrode 22 is linked drive electrode 18, its other end extends on the surface of base part 14.Equally, an end of strip extraction electrode 24 is linked drive electrode 20, its other end extends on the back side of base part 14.
The drive electrode 18 of this preferred embodiment and 20 and extraction electrode 22 and 24 preferably have double-decker respectively.Preferably make the Ni layer form lower floor, preferably Au is stacked on the Ni layer layer by layer and forms cap rock.Be preferably in shelter the part that does not form electrode after, by plating, sputter, evaporation or print and form drive electrode 18 and 20 and extraction electrode 22 and 24.
Because oscillating component 12 and base part 14 comprise Unitarily molded piezoelectrics, so do not need bonding oscillating component 12 and base part 14 required step or material.So this has just reduced makes required parts and the step of loud speaker, and has improved the quality of loud speaker acoustic characteristic.In addition, have about 1: 5 to about 1: 20 weight ratio, further improved the acoustic characteristic of loud speaker by oscillating component 12 and base part 14 are formed.In addition, because Unitarily molded piezoelectrics involving vibrations part 12 and base part 14, so suppressed the profile vibration of higher modes.Because the structure of preferred embodiment of the present invention can form drive electrode 18 and 20 and extraction electrode 22 and 24 simultaneously by plating step or similar technology, so further be beneficial to the manufacturing of loud speaker.Because extraction electrode 22 and 24 extends to base part 14, thus vibration can not suppressed, and the phenomenon of vibration takes place to suppress through regular meeting in the prior art of directly linking oscillating component 12 that goes between.Because form extraction electrode 22 and 24 and splicing ear 26 and 28 in loud speaker 10, institute is so that link the external circuit (not shown) to electrode 22,24,26 and 28.In addition, owing in the base part 14 of loud speaker 10, form notch 16 is installed, so easily loud speaker 10 is installed on the support component.
As mentioned above, according to preferred embodiment of the present invention, oscillating component with base part is molded becomes single piezoelectric integral body, thereby do not need as other loud speakers, oscillating component to be linked to each other with base part.In addition, reduced the number and the step of the required parts of equipped with loudspeaker, and reduced manufacturing cost significantly.In addition, because oscillating component and base part are molded whole piezoelectrics, so reduced the acoustic characteristic that the profile vibration of higher modes has also improved loud speaker greatly significantly.
Though the present invention has been carried out concrete displaying and description with reference to preferred embodiment of the present invention, the one skilled in the art should be understood that and can carry out above and other change to form of the present invention and details, and do not deviate from the spirit and scope of the present invention.
Claims (10)
1. loud speaker comprises:
Be essentially hemispheric oscillating component;
Be used to make a plurality of drive electrodes of described oscillating component vibration;
Be used to support the base part of described oscillating component; It is characterized in that
Described oscillating component and described base part comprise single Unitarily molded piezoelectrics.
2. loud speaker as claimed in claim 1 is characterized in that described a plurality of drive electrode is positioned on the surface of described oscillating component, and the part of described drive electrode extends to described base part.
3. loud speaker as claimed in claim 1 is characterized in that a plurality of installation notches are set in described base part, so that described loud speaker can be supported on the support component.
4. loud speaker as claimed in claim 1 is characterized in that described oscillating component and described base part have about 1: 5 to about 1: 20 relative weight ratio.
5. loud speaker as claimed in claim 1 is characterized in that described oscillating component is with its thickness direction polarization.
6. method of making loud speaker is characterized in that may further comprise the steps:
Be provided for forming the mould of the single integral body of involving vibrations part and base part;
Piezoelectric is injected described mould, to form the single molded, unitary of involving vibrations part and base part; And
The molded, unitary of sintering involving vibrations part and base part.
7. method as claimed in claim 6 is characterized in that also being included on the surface of described oscillating component the step of a plurality of drive electrodes is set, thereby the part of described drive electrode is extended on the described base part.
8. method as claimed in claim 6 is characterized in that a plurality of installation notches are set in described base part, so that described loud speaker can be supported on the support component.
9. method as claimed in claim 6 is characterized in that described oscillating component and described base part have about 1: 5 to about 1: 20 relative weight ratio.
10. method as claimed in claim 6 is characterized in that described oscillating component is along its thickness direction polarization.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09368133A JP3134835B2 (en) | 1997-12-27 | 1997-12-27 | Speaker |
| JP368133/1997 | 1997-12-27 | ||
| JP368133/97 | 1997-12-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1222048A true CN1222048A (en) | 1999-07-07 |
| CN1132499C CN1132499C (en) | 2003-12-24 |
Family
ID=18491050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98107352A Expired - Lifetime CN1132499C (en) | 1997-12-27 | 1998-04-24 | Speaker |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0926924B1 (en) |
| JP (1) | JP3134835B2 (en) |
| KR (1) | KR100320300B1 (en) |
| CN (1) | CN1132499C (en) |
| DE (1) | DE69839907D1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100906335B1 (en) * | 2007-08-07 | 2009-07-06 | 티.비텔레콤(주) | Method for manufacturing base member of digital microphone |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2409654B1 (en) * | 1977-11-17 | 1985-10-04 | Thomson Csf | PIEZOELECTRIC TRANSDUCER DEVICE AND MANUFACTURING METHOD THEREOF |
| FR2473242A1 (en) * | 1980-01-08 | 1981-07-10 | Thomson Csf | ACTIVE DOME ELECTROACOUSTIC TRANSDUCER |
| GB2134748B (en) * | 1983-01-17 | 1986-06-25 | Victor Company Of Japan | Loudspeaker diaphragm |
| JP3180646B2 (en) * | 1995-12-14 | 2001-06-25 | 株式会社村田製作所 | Speaker |
| JP3186584B2 (en) * | 1996-05-31 | 2001-07-11 | 株式会社村田製作所 | Speaker |
-
1997
- 1997-12-27 JP JP09368133A patent/JP3134835B2/en not_active Expired - Fee Related
-
1998
- 1998-04-22 KR KR1019980014330A patent/KR100320300B1/en not_active IP Right Cessation
- 1998-04-24 EP EP98401003A patent/EP0926924B1/en not_active Expired - Lifetime
- 1998-04-24 CN CN98107352A patent/CN1132499C/en not_active Expired - Lifetime
- 1998-04-24 DE DE69839907T patent/DE69839907D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11196490A (en) | 1999-07-21 |
| KR100320300B1 (en) | 2002-02-19 |
| KR19990062395A (en) | 1999-07-26 |
| CN1132499C (en) | 2003-12-24 |
| DE69839907D1 (en) | 2008-10-02 |
| JP3134835B2 (en) | 2001-02-13 |
| EP0926924A2 (en) | 1999-06-30 |
| EP0926924A3 (en) | 2005-04-13 |
| EP0926924B1 (en) | 2008-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20031224 |