CN101027937B - Piezoelectric sound producing unit - Google Patents
Piezoelectric sound producing unit Download PDFInfo
- Publication number
- CN101027937B CN101027937B CN200580024867XA CN200580024867A CN101027937B CN 101027937 B CN101027937 B CN 101027937B CN 200580024867X A CN200580024867X A CN 200580024867XA CN 200580024867 A CN200580024867 A CN 200580024867A CN 101027937 B CN101027937 B CN 101027937B
- Authority
- CN
- China
- Prior art keywords
- mentioned
- electrode
- oscillating plate
- piezoelectric element
- support portion
- 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.)
- Expired - Fee Related
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 48
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 40
- 239000000057 synthetic resin Substances 0.000 claims abstract description 40
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims description 58
- 238000009413 insulation Methods 0.000 claims description 41
- 230000001815 facial effect Effects 0.000 claims description 21
- 239000011241 protective layer Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 9
- 239000006071 cream Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000011505 plaster Substances 0.000 claims description 2
- 239000004020 conductor Substances 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 description 21
- 238000010586 diagram Methods 0.000 description 6
- 239000007767 bonding agent Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 238000005476 soldering Methods 0.000 description 4
- 229920003180 amino resin Polymers 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000027455 binding Effects 0.000 description 1
- 238000009739 binding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 238000007740 vapor deposition 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
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
A piezoelectric sound producing unit capable of enlarging the amplitude of the diaphragm of a piezoelectric vibrator. The front surface-side outer peripheral surface (17c) of a diaphragm (17) and a support (1) are joined together by a joining means. The joining means is formed of a flexible synthetic resin sheet (9), and is arranged across the front surface-side outer peripheral surface (17c) of the diaphragm (17) and the support portion (5) of the support (1) so as to allow the diaphragm (17) to vibrate as a whole. The electric insulating layer (25) of a first lead-out means (23) for electrically connecting the first electrode (19a) of a first piezoelectric element (19) with a first output electrode (13a) and a first lead-out conductor (27) are formed of thick films coated with insulating resin paste. The electric insulating layer (31) of a second lead-out means (29) for electrically connecting the first electrode (21a) of a second piezoelectric element (21) with a first output electrode (13) and a second lead-out conductor (33) are formed of thick films coated with insulating resin paste. The electrically-insulating layer and the connecting conductor of a connecting means for connecting electrically the diaphragm (17) and a second output electrode (15) together are also formed of thick films coated with insulating resin paste.
Description
Technical field
The present invention relates to piezoelectric sound producing unit.
Background technology
Open shown in the 2003-78995 communique (patent documentation 1) the slim piezoelectric sound producing unit on the supporter that is supported on piezoelectric transducer support portion with annular the spy.Piezoelectric transducer engages the 1st and the 2nd piezoelectric element with the mode of on the two sides of metal oscillating plate, reserving the circumferential part of this oscillating plate and constitutes.Then, the circumferential part of the single face of oscillating plate is bonded on the support portion of annular with bonding agent.In this piezoelectric sound producing unit, between the surface electrode of the 1st and the 2nd piezoelectric element and portion of terminal, seeking and the state of oscillating plate insulation configuration metal forming down, with this metal forming of bonding agent joint with conductivity.Then, cover with reinforcement features such as plastic belts on the part of metal forming and piezoelectric element on every side thereof, be formed on the unit of drawing that has conductive part between surface electrode and the output electrode of the 1st and the 2nd piezoelectric element.
Patent documentation 1: the spy opens the 2003-78995 communique
Summary of the invention
In above-mentioned slim piezoelectric sound producing unit, exist the diameter dimension of vibration plate vibrates little, the amplitude of oscillating plate can not become big problem.In addition, compare, do not have the bump of scolding tin, can reduce to connect the surface electrode of the 1st and the 2nd piezoelectric element and the gauge of the conductive part between the portion of terminal with the situation of lead-in wire soldering on the surface electrode of the 1st and the 2nd piezoelectric element.But in this structure, can not further reduce the gauge of conductive part.In addition, in this piezoelectric sound producing unit in the past, because the bond strength of metal forming is low; Peel off in order not make metal foil; So need further to cover on the metal forming, so have not only that number of parts increases, and problem of also increasing of manufacturing process number with reinforcement features such as plastic belts.
The object of the present invention is to provide a kind of piezoelectric sound producing unit that can increase the amplitude of piezoelectric transducer oscillating plate.
Another object of the present invention is to provide a kind of ratio thinner in the past piezoelectric sound producing unit.
Another object of the present invention is to provide a kind of construct than in the past simpler, and the high piezoelectric sound producing unit of reliability.
Another object of the present invention is to provide a kind of piezoelectric sound producing unit that the 1st and the 2nd between the 1st and the 2nd piezoelectric element and the output electrode drawn the gauge of unit that can reduce to connect.
Another object of the present invention is to provide a kind of can improve the 1st and the 2nd draw the bond strength of unit piezoelectric sound producing unit.
The piezoelectric sound producing unit of improveing object as the present invention possesses: the piezoelectric transducer that on oscillating plate, engages piezoelectric element with the peripheral facial mode of reserving annular; Support the supporter of the outer part of oscillating plate; Link the outer part of oscillating plate and the connection unit of supporter.In the present invention, form connection unit, cross over peripheral facial and ground, the support portion configuration of oscillating plate, so that oscillating plate can body vibration with having flexible synthetic resin thin plate.According to the present invention, the outer part of oscillating plate not with the support portion contiguously, be supported on oscillating plate on the supporter via having flexible synthetic resin thin plate (connection unit).Therefore, the oscillating plate body vibration can strengthen the amplitude of oscillating plate.Its result can reduce the resonance frequency of oscillating plate, increases volume.
When piezoelectric element constitute have from the teeth outwards the 1st electrode and overleaf on have under the situation of the 2nd electrode, as long as the 2nd electrode engagement on oscillating plate.In this case; The peripheral face of crossing vibrating body is being set on the synthetic resin thin plate integratedly and is extending to the extension on the 1st electrode; The synthetic resin thin plate is provided with the 1st wiring pattern that is connected with the 1st electrode and the 2nd wiring pattern that is connected with oscillating plate, preferably extends to the 1st wiring pattern on the extension of synthetic resin thin plate.So; Soldering etc. is carried out at both ends through to the 1st wiring pattern; Can seek to use the 1st wiring pattern to connect the 1st electrode and the output electrode of piezoelectric element; Soldering etc. is carried out at both ends through to the 2nd wiring pattern, can seek oscillating plate and the output electrode of using the 2nd wiring pattern to connect piezoelectric element.Therefore, can easily realize being connected of piezoelectric element and output electrode, reduce the part count relevant with both connections.
Piezoelectric sound producing unit of the present invention both can be applied to piezoelectric element only with the single side piezoelectric sound producing unit of a face joint of oscillating plate, also can be applied to the piezoelectric sound producing unit of the double-side type on two faces that piezoelectric element is bonded on oscillating plate respectively.
Concrete piezoelectric sound producing unit of the present invention possesses: piezoelectric transducer, have the annular the support portion supporter, connection unit, draw unit and linkage unit.Piezoelectric transducer possesses and has the surface and the metal oscillating plate at the back side, have from the teeth outwards the 1st electrode and overleaf on have the 2nd electrode, reserve the peripheral face of face side on oscillating plate surface, the 2nd electrode can be bonded on the surface of oscillating plate with conducting.Connection unit is formed by electrical insulating material, and links the face side periphery surface and the support portion of oscillating plate.Drawing the unit has drawing of being connected with the 1st electrode electricity of piezoelectric element and uses conductive part.Linkage unit has and being connected of oscillating plate electrical connection of piezoelectric element uses conductive part.Then, form connection unit, cross over peripheral facial and ground, the support portion configuration of oscillating plate, so that oscillating plate can body vibration with having flexible synthetic resin thin plate.In addition, draw the unit and have the peripheral face of the 1st electrode, face side and the connection unit of crossing over piezoelectric element, and the electric insulation layer that forms by thick film or film.Draw with conductive part with its leading section be connected with the 1st electrode of the 1st piezoelectric element, at least a portion of remaining part is positioned at the mode on the electric insulation layer, constitute by the conductive layer that adopts thick film or film to form.
If adopt this structure, draw the electric insulation layer of unit and draw and use conductive part because form, so can reduce the gauge of drawing the unit of drawing with comparing in the past from the 1st electrode of piezoelectric element with thick film or film.In addition, because can improve the bond strength of drawing the unit with comparing in the past,, just can provide reliability high piezoelectric sound producing unit so use reinforcement feature can not resembling in the past.
Under the situation of the piezoelectric element that adopts double-side type, constitute piezoelectric element by the 1st piezoelectric element and the 2nd piezoelectric element that on the two sides of oscillating plate, engage respectively.The 1st piezoelectric element have from the teeth outwards the 1st electrode and overleaf on have the 2nd electrode, the face side of reserving oscillating plate surface is peripheral facial, the 2nd electrode can be bonded on the surface of oscillating plate electrically conducting.The 2nd piezoelectric element have from the teeth outwards the 1st electrode and overleaf on have the 2nd electrode, the rear side at the back side of reserving oscillating plate is peripheral facial, the 2nd electrode can be bonded on the back side of oscillating plate with conducting.In this case, use and to have the 1st on the 1st electrode that is connected electrically in the 1st piezoelectric element and draw to draw the unit and have the 2nd on the 1st electrode that is connected electrically in the 2nd piezoelectric element and draw with the 2nd of conductive part and draw the unit with the 1st of conductive part.
If adopt this structure; Because with thick film or film form the 1st draw unit and the 2nd draw the unit separately electric insulation layer and draw and use conductive part, so can reduce from what the 1st and the 2nd piezoelectric element the 1st electrode was separately drawn the 1st to draw the gauge that the unit is drawn in unit and the 2nd with comparing in the past.In addition, because can improve the 1st and draw the bond strength that the unit is drawn in unit and the 2nd with comparing in the past,, just can provide reliability high piezoelectric sound producing unit so use reinforcement feature can not resembling in the past.
If the mode with the face side outer part that covers oscillating plate disposes connection unit; Then because become the state that the face side outer part does not expose; So can not draw on the zone of electric insulation layer of unit and form tomography forming the 1st, can form the plane to electric insulation layer simply.In this case, as long as form electric insulation layer with the 1st electrode and the connection unit mode of crossing over the 1st piezoelectric element.
Though the structure of supporter is arbitrarily; But also can constitute supporter with the mode that has the output electrode maintaining part integratedly with the support portion, wherein the output electrode maintaining part possesses and is electrically connected the 1st and the 2nd and draws with the 1st output electrode of conductive part and the 2nd output electrode of electrical ties oscillating plate.In this case, connect facial or peripheral facial and the 2nd output electrode of rear side in face side periphery that is electrically connected oscillating plate with the linkage unit of conductive part with having.This linkage unit is made up of with being connected with conductive part electric insulation layer.Electric insulation layer can be crossed over the face side of oscillating plate peripheral facial or rear side peripheral face and connection unit, formed by thick film or film.Connection then is connected with its leading section and the peripheral face of the peripheral facial perhaps rear side of face side with conductive part, and rearward end is connected with the 2nd output electrode, and remaining part is positioned at the electric insulation layer upper type, is made up of the conductive layer that adopts thick film or film to form.If the electric insulation layer that forms linkage unit with thick film or film is like this used conductive part with being connected, then with compared the gauge that can reduce the linkage unit between oscillating plate and the 2nd output electrode in the past.In addition, with compared the bond strength that can improve between oscillating plate and the linkage unit in the past.
The 1st output electrode constitutes possesses the output electrode extension; This output electrode extension is adjacent to form with the surface portion of the connection unit that links the support portion; And extend to the inner peripheral surface part of surface portion and support portion, the conductive layer of preferably drawing formation the 2nd with conductive part is electrically connected with the output electrode extension.Constitute if adopt like this, then extend to the output electrode extension of the inner peripheral surface part of support portion, can enough simple structures be electrically connected the 1st and draw with conductive part and the 2nd and draw with conductive part and the 1st output electrode through utilization.
Preferably constitute the output electrode extension, form the 2nd output electrode with the mode of surface portion, inner peripheral surface part and the back portion of crossing over the support portion at least with the mode that extends on thickness direction with the surface portion opposing backside surface part of support portion.If adopt this structure, because can let the 1st and the 2nd output electrode be present on the both sides of surface portion and back portion of support portion, so can obtain the easy advantage that becomes being installed for the circuitry substrate of piezoelectric sound producing unit.
Be configured on the rear side of oscillating plate if draw the 2nd with conductive part; Draw conductive layer with conductive part to the 2nd and be connected electrically on the electrode part on the inner peripheral surface part of the support portion that is formed at the 1st output electrode, then can carry out the 2nd electrical connection of drawing easily with conductive part and the 1st output electrode.
Supporter can constitute by the in fact equal substrate of the enough thickness that is formed by electrical insulating material.If constitute supporter with substrate like this; Then through on substrate, implementing perforation processing; Not only can produce supporter in batches, also because can utilize known circuit pattern to form technology forms the 1st and the 2nd output electrode simply, so with compared the price that can reduce supporter in the past.
Connection unit preferably by possess across the annular section of the surface engagement of the support portion of adhesive linkage and supporter, have flexible synthetic resin thin plate and constitute.In this case, piezoelectric transducer contacts with the inner peripheral surface of oscillating plate discord support portion, and is accommodated in the mode of the inside of support portion to oscillating plate and the 2nd piezoelectric element, with connection unit the support portion is supported.If adopt this structure, because the motion of the outer part of oscillating plate can not receive the constraint of essence, so can make the amplitude of oscillating plate maximum.
And, when constituting with the synthetic resin thin plate under the situation of connection unit, preferably further with and the support portion between clip the synthetic resin thin plate mode setting be fixed on the protective layer of the annular on the synthetic resin thin plate.If adopt this structure, then can prevent that through protective layer the synthetic resin thin plate from peeling off from the support portion.In addition in this case, preferably draw the gauge that decides protective layer with the mode of conductive part with the 1st piezoelectric element and the 1st that can take in piezoelectric transducer in the interior volume of surrounding fully with protective layer.If adopt this structure; Then in when carrying or on automatic mounting machine, be installed to last time such as circuitry substrate automatically; Because because the existence of protective layer can prevent that the 1st piezoelectric element and the 1st that other parts touch piezoelectric transducer from drawing and use conductive part, so can reduce the defect rate of the product that utilizes piezoelectric sound producing unit.This protective layer for example can be made up of another synthetic resin thin plate that sticks on via adhesive linkage on the synthetic resin thin plate.If adopt this structure, configuration protection layer simply then.
Can form in order to constitute the 1st and the 2nd and draw the unit and the electric insulation layer that uses with applying thick film that insulating resin cream forms, form conductive layer with the thick film of coating electrically conductive property resin plaster formation.If adopt this structure, then can enough printing technologies form electric insulation layer and conductive layer simply, cheaply.
Description of drawings
Fig. 1 is the plane graph of the piezoelectric sound producing unit of execution mode of the present invention.
Fig. 2 (A) is the back view of the piezoelectric sound producing unit of execution mode of the present invention, and Fig. 2 (B) is the figure of the structure of output electrode maintaining part.
Fig. 3 is the III-III line profile of Fig. 1.
Fig. 4 is the IV-IV line profile of Fig. 1.
Fig. 5 is the wiring diagram of expression piezoelectric sound producing unit shown in Figure 1.
Fig. 6 (A) is the skeleton diagram of the vibration plate vibrates state of expression piezoelectric sound producing unit shown in Figure 1, and Fig. 6 (B) is the skeleton diagram of vibration plate vibrates state of the piezoelectric sound producing unit of expression comparative example.
Fig. 7 is the profile of the piezoelectric sound producing unit of another embodiment of the present invention.
Fig. 8 is the plane graph of the connection unit in piezoelectric sound producing unit shown in Figure 7, used.
Embodiment
Below, the execution mode of the piezoelectric sound producing unit that present invention will be described in detail with reference to the accompanying.Fig. 1 and Fig. 2 (A) are the plane graph and the ground plans of the piezoelectric sound producing unit of execution mode 1 of the present invention, and Fig. 3 is the III-III line profile of Fig. 1, and Fig. 4 is the IV-IV line profile of Fig. 1, and Fig. 5 is the wiring diagram of the piezoelectric sound producing unit of this execution mode.And, for easy understanding, in Fig. 3 and Fig. 4, draw the gauge of the part of a part turgidly.Shown in each figure, the piezoelectric transducer 3 that the piezoelectric sound producing unit of this execution mode has supporter 1, supported by this supporter 1.Supporter 1 has the support portion 5 and output electrode maintaining part 7 that becomes one, and boring a hole through the substrate that in fact thickness that as glass-epoxy resin substrate, forms with electrical insulating material equated forms.Support portion 5 has the shape of annular, shown in Fig. 2 (B), on the interior circumferential portion of the part that is connected with output electrode maintaining part 7, forms cross section shape and be 2 the recess 5a and the 5b of semicircular arc.Then, on output electrode maintaining part 7, constitute link to each other with 2 recess 5a and 5b, in face side zone 5c and 5d and regional 5e of rear side and the continuous electrode part of 5f.On face side zone 5c and 5d and rear side zone 5e and 5f, form by constituting the 1st and the 2nd output electrode 13a, 15a and the 1st and the 2nd rear side electrode 13b, the 15b that the Copper Foil through plating that the 1st and the 2nd output electrode constitutes the part of portion 13,15 is formed.Like Fig. 3 and shown in Figure 4, on the inner face of 2 recess 5a and 5b, wait formation conductive connection part 13c and the 15c such as conductive membrane that obtains with electroplating.This support portion 5 has the gauge that oscillating plate the 17, the 2nd piezoelectric element 21 and the 2nd of taking in the later explanation on the piezoelectric transducer 3 is fully drawn with conductive part 29.
In addition, on the surperficial 5g of support portion 5, engage the synthetic resin thin plate 9 that constitutes connection unit across not shown adhesive linkage.Synthetic resin thin plate 9 is formed by having polyester belt flexible and that on single face, have an annular shape of bonding agent.Engage the vibrating body bonding part 9b of piezoelectric transducer 3 on all sides that this synthetic resin thin plate 9 has the annular section 9a that engages with support portion 5, be positioned at annular section 9a.On the surperficial 5g of support portion 5 with and support portion 5 between clip the annular section 9a of synthetic resin thin plate 9 mode fix protective layer 11 via not shown adhesive linkage.Protective layer 11 has the annular shape of being made up of the polyester that on single face, has bonding agent, and is as shown in Figure 1, is configured to cross over the 1st of explanation afterwards and draws with on the conductive part 23.This protective layer 11 has the gauge that the 1st piezoelectric element 19 and the 1st of the later explanation of taking in fully on the piezoelectric transducer 3 is drawn with conductive part 23.
Output electrode maintaining part 7 has the shape near square, 5 to form to diametric(al) outside extension mode from the support portion.As stated, on output electrode maintaining part 7, form the 1st above-mentioned output electrode formation portion 13 and the 2nd output electrode formation portion 15 side by side.The 1st output electrode formation portion 13 possesses: the 1st output electrode 13a of the adjacent formation of surface portion that links with the synthetic resin thin plate (connection unit) of support portion 59; Extend to the output electrode extension (conductive connection part 13c and the 1st rear side electrode 13b) of the inner peripheral surface part (ditch 5a) of support portion 5.The output electrode extension extends on thickness direction the surface portion opposing backside surface part with support portion 5.The 2nd output electrode formation portion 15 is also the same with the 1st output electrode formation portion 13, possesses: the 2nd output electrode 15a of the adjacent formation of surface portion that links with the synthetic resin thin plate (connection unit) of support portion 59; Extend to the output electrode extension (conductive connection part 15c and the 2nd rear side electrode 15b) of the inner peripheral surface part of this surface portion and support portion 5.That is, the 1st output electrode formation portion 13 and the 2nd output electrode formation portion 15 all are formed with surface portion, inner peripheral surface part ( ditch 5a, 5b) and the mode of back portion of crossing over support portion 5.
The 1st electrode 19a of the 1st piezoelectric element 19 and the 1st output electrode 13 are drawn unit 23 through the 1st and are electrically connected.The 1st draws unit 23 has electric insulation layer 25 and is formed on the 1st on the electric insulation layer 25 and draws with conductive part 27.As shown in Figure 3, electric insulation layer 25 is the dielectric films that apply the thick film that the insulating resin cream be made up of the acrylic-amino resin forms.Electric insulation layer 25 is crossed over the 1st electrode 19a of the 1st piezoelectric element 19, the peripheral facial 17c of face side and the synthetic resin thin plate 9 of oscillating plate 17, is extending near the center of the 1st electrode 19a and between the 1st output electrode 13a.The 1st to draw with conductive part 27 are the conducting films that apply the thick film that the electroconductive resin cream be made up of resin-silver paste etc. forms.The 1st draws with conductive part 27 its leading section 27a and near the center of the 1st electrode 19a, is connected with the 1st electrode 19a of the 1st voltage component 19, and rearward end 27b is connected with the 1st output electrode 13a.Then, remainder is positioned on the electric insulation layer 25.
The 1st electrode 21a of the 2nd piezoelectric element 21 and the 1st output electrode 13 are drawn unit 29 through the 2nd and are electrically connected.The 2nd draws unit 29 has electric insulation layer 31 and is formed on the 2nd on the electric insulation layer 31 and draws with conductive part 33.Electric insulation layer 31 is formed by the thick film that is coated with the insulating resin cream of being made up of the acrylic-amino resin.Electric insulation layer 31 is crossed over the 1st electrode 21a of the 2nd piezoelectric element 21, the peripheral facial 17d of rear side and the synthetic resin thin plate 9 of oscillating plate 17, is extending near the center of the 2nd electrode 21a and between the conductive connection part 13c.The 2nd to draw with conductive part 33 are the conducting films that apply the thick film that the electroconductive resin cream be made up of resin-silver paste etc. forms.The 2nd draws with conductive part 33 its leading section 33a and near the center of the 2nd electrode 21a, is connected with the 1st electrode 21a of the 2nd piezoelectric element 21, and rearward end 33b is connected with the conductive connection part 13c of the output electrode extension of the 1st output electrode formation portion 13 on ditch 5a.Then, remainder is positioned on the electric insulation layer 31.Thus, as shown in Figure 5, the 1st draws to draw with conductive part 33 and the 1st output electrode 13 with conductive part the 27, the 2nd and is connected electrically in together.
Fig. 6 (A) is the skeleton diagram of state of oscillating plate 17 vibration of the piezoelectric sound producing unit of this example of expression; Fig. 6 (B) is illustrated on the surface of support portion R5 the skeleton diagram of state of oscillating plate R17 vibration of piezoelectric sound producing unit that connects the comparative example (for example, the spy opens 2003-78995) of oscillating plate R17 via bonding agent.From 2 figure, can know the amplitude f of the piezoelectric sound producing unit of this example shown in Fig. 6 (A)
1Amplitude f with the piezoelectric sound producing unit of the comparative example shown in Fig. 6 (B)
2Compare and become big.This is because in the piezoelectric sound producing unit of this example, the surperficial 17a of the oscillating plate 17 of piezoelectric transducer 3 and 5 contacts of back side 17b discord support portion, and via 9 supported 5 causes that supported of connection unit.
In addition; In the piezoelectric sound producing unit of this example; Because with thick film form the 1st draw unit 23 electric insulation layer 25 and the 1st draw the electric insulation layer 31 and the 2nd of drawing unit 29 and draw with conductive part 33 with conductive part 27 and 1 the 2nd, so with the gauge of in the past comparing the conductive part (the 1st draws unit 23 and the 2nd draws unit 29) between the 1st electrode 19a, 21a and the 1st output electrode 13 that can reduce the 1st and the 2nd piezoelectric element 19,21.In addition, with the bond strength of comparing the 1st electrode 19a, 21a and the conductive part (the 1st draws unit 23 and the 2nd draws unit 29) that can improve the 1st and the 2nd piezoelectric element 19,21 in the past.
Fig. 7 is the profile of the piezoelectric sound producing unit of another embodiment of the present invention (execution mode 2).The piezoelectric sound producing unit of this example uses the piezoelectric element that only on a face 117a of oscillating plate 117, engages the single side of piezoelectric element 119.In addition, as shown in Figure 8 as connection unit, use the structure that on synthetic resin thin plate 109, is provided with the 1st wiring pattern 151 and the 2nd wiring pattern 153.Synthetic resin thin plate 109 is made up of employed polyimides in flexible substrate etc., has the 109a of annular portion, the electrode formation 109b of portion and extension 109c.The electrode formation 109b of portion is roughly rectangular, forms with the mode of extending to the diametric(al) outside from the 109a of annular portion.Extension 109c is formed on a part of relative position with the electrode formation 109b of portion via the 109a of annulus portion, extends to the inboard of the 109a of annular portion.
The 1st wiring pattern 151 is made up of Copper Foil, on the entire electrode formation 109b of portion, on the 109a of annular portion and extend on the extension 109c.Then, the leading section 151a of the 1st wiring pattern 151 engages with the 1st electrode 119a electricity of piezoelectric element 1 19 via the thick film portion 155 that uses conductive paste to form.The rearward end 151b of the 1st wiring pattern 151 engages with the 1st output electrode 113a electricity via the thick film portion 157 that uses conductive paste to form.
The 2nd wiring pattern 153 is made up of Copper Foil, on entire electrode formation 109b of portion and the 109a of annular portion, extends abreast with the 1st wiring pattern 151.Then, the leading section 153a of the 2nd wiring pattern 153 engages with the surperficial 117a electricity of the oscillating plate 117 of piezoelectric element 119 via the thick film portion that uses conductive paste to form.The rearward end 153b of the 2nd wiring pattern 153 engages with the 2nd output electrode electricity via the thick film portion that uses conductive paste to form.
In the piezoelectric sound producing unit of this example; Use the 1st wiring pattern 151 can seek the 1st electrode 119a of piezoelectric element 119 and being connected of the 1st output electrode 113a, use the 2nd wiring pattern 153 can seek the oscillating plate 117 of piezoelectric element 1 19 and being connected of the 2nd output electrode.Therefore, carry out being connected of piezoelectric element 119 and each output electrode easily, can reduce with both and connect relevant number of parts.
And, in the above-described embodiment, carried out being connected of the 1st and the 2nd wiring pattern 151,153 and each one, but also can carry out the connection of each one with soldering etc. through the thick film portion that uses conductive paste to form.In addition; On the part at the 1st wiring pattern 151 of synthetic resin thin plate 109 or the 2nd wiring pattern 153 places, form through hole; In this through hole, use formation through hole conductive parts such as conductive paste, also can seek being connected of the 1st wiring pattern 151 or the 2nd wiring pattern 153 and specified part.
In addition, in each above-mentioned execution mode, formed electric insulation layer, drawn with conductive part and connect and use conductive part with thick film, but can certainly use technology such as sputter, vapor deposition to form electric insulation layer, draw with conductive part and connection and use conductive part with film.In addition, also can form with the metal forming of Copper Foil etc.
In addition; In the 1st above-mentioned execution mode, adopt the piezoelectric element of double-side type, in execution mode 2, adopted the piezoelectric element of single side; But the present invention also can adopt any type of piezoelectric element; In execution mode 1, adopt the piezoelectric element of single side, the piezoelectric element of employing double-side type can in execution mode 2.
In addition, in each above-mentioned execution mode, use the insulating material of forming by glass-epoxy resin to form, but also can use electric conducting material formation supporter such as metal as supporter 1.In this case, as long as on the surface of electric conducting material, form insulating barrier, on this insulating barrier, form output electrode and get final product.
According to the present invention, its outer part of oscillating plate not with the support portion contiguously, support via the supported body of connection unit.Therefore, can the oscillating plate body vibration, strengthen the amplitude of oscillating plate.Its result can reduce the resonance frequency of oscillating plate, increases volume.
In addition, draw the electric insulation layer of unit and draw and use conductive part, so can reduce the gauge of drawing the unit of drawing with comparing in the past from the 1st electrode of piezoelectric element because form with thick film or film.In addition, because can improve the bond strength of drawing the unit with comparing in the past, so, just can provide reliability high piezoelectric sound producing unit unlike such strengthening part that uses in the past.
Claims (8)
1. piezoelectric sound producing unit possesses:
Piezoelectric transducer, this piezoelectric transducer has
Metal oscillating plate with surface and back side,
Have from the teeth outwards the 1st electrode and overleaf on have the 2nd electrode, reserve peripheral the 1st piezoelectric element that above-mentioned the 2nd electrode can be bonded on the above-mentioned surface on the above-mentioned oscillating plate of face side on the above-mentioned surface of above-mentioned oscillating plate facially with conducting,
Have from the teeth outwards the 1st electrode and overleaf on have the 2nd electrode, reserve that the rear side at the above-mentioned back side of above-mentioned oscillating plate is peripheral can be bonded on the 2nd piezoelectric element on the above-mentioned back side of above-mentioned oscillating plate with above-mentioned the 2nd electrode facially with conducting;
Supporter, the support portion with annular;
Connection unit forms and links the peripheral face of above-mentioned face side and the above-mentioned support portion of above-mentioned oscillating plate with electrical insulating material;
The 1st draws the unit, has the 1st drawing and use conductive part of being connected with above-mentioned the 1st electrode electricity of above-mentioned the 1st piezoelectric element;
The 2nd draws the unit, has the 2nd drawing and use conductive part of being connected with above-mentioned the 1st electrode electricity of above-mentioned the 2nd piezoelectric element,
It is characterized in that above-mentioned connection unit forms with having flexible synthetic resin thin plate, be configured with crossing on the above-mentioned peripheral face of above-mentioned oscillating plate and above-mentioned support portion, so that above-mentioned oscillating plate can body vibration,
The above-mentioned the 1st draws the unit has the electric insulation layer that leap forms on peripheral face of above-mentioned the 1st electrode of above-mentioned the 1st piezoelectric element, above-mentioned face side and above-mentioned connection unit and by thick film or film; The above-mentioned the 1st draws and is connected on above-mentioned the 1st electrode of above-mentioned the 1st piezoelectric element with its leading section with conductive part; At least a portion in the remainder is positioned at the mode on the above-mentioned electric insulation layer; Conductive layer by adopting thick film or film to form constitutes
The above-mentioned the 2nd draws the unit has the electric insulation layer that leap forms on above-mentioned the 1st electrode of above-mentioned the 2nd piezoelectric element and the peripheral face of above-mentioned rear side and by thick film or film; The above-mentioned the 2nd draws with conductive part and is connected with above-mentioned the 1st electrode of above-mentioned the 2nd piezoelectric element with its leading section; At least a portion in the remainder is positioned at the mode on the above-mentioned electric insulation layer, is made up of the conductive layer that adopts thick film or film to form
Above-mentioned supporter has the output electrode maintaining part with above-mentioned support portion one, and above-mentioned output electrode maintaining part has and is electrically connected the above-mentioned the 1st and the 2nd and draws with the 1st output electrode of conductive part and be electrically connected the 2nd output electrode of above-mentioned oscillating plate,
The peripheral face of the peripheral facial or above-mentioned rear side of the above-mentioned face side of above-mentioned oscillating plate is electrically connected through having the linkage unit that is connected with conductive part with above-mentioned the 2nd output electrode,
Above-mentioned linkage unit has the electric insulation layer that leap forms on peripheral peripheral face of facial or above-mentioned back layer of the above-mentioned face side of above-mentioned oscillating plate and above-mentioned connection unit and by thick film or film; Above-mentioned connection with conductive part with its leading section and the peripheral facial or above-mentioned rear side of above-mentioned face side peripherally facially be connected, rearward end is connected with above-mentioned the 2nd output electrode, remainder is positioned at the mode on the above-mentioned electric insulation layer; Conductive layer by adopting thick film or film to form constitutes
Above-mentioned the 1st output electrode possesses the surface portion that above-mentioned connection unit linked inner peripheral surface that form and that extend to above-mentioned surface portion and the above-mentioned support portion output electrode extension partly with above-mentioned support portion adjacently,
Constitute the above-mentioned the 2nd above-mentioned conductive layer of drawing and be connected electrically on the above-mentioned output electrode extension with conductive part,
Above-mentioned output electrode extension extends on thickness direction the above-mentioned surface portion opposing backside surface part with above-mentioned support portion,
Above-mentioned the 2nd output electrode is formed with the mode of crossing at least on the above-mentioned surface portion in above-mentioned support portion, above-mentioned inner peripheral surface part and the above-mentioned back portion.
2. piezoelectric sound producing unit as claimed in claim 1, wherein:
The above-mentioned the 2nd draws the above-mentioned rear side that is configured in above-mentioned oscillating plate with conductive part, and the above-mentioned the 2nd draws with the electrode on the above-mentioned inner peripheral surface part of the above-mentioned conductive layer of conductive part and the above-mentioned support portion that is formed on above-mentioned the 1st output electrode and partly be electrically connected.
3. piezoelectric sound producing unit as claimed in claim 1, wherein:
Above-mentioned supporter uses the in fact equal substrate of thickness that is formed by electrical insulating material to constitute,
Above-mentioned connection unit possess via adhesive linkage be engaged with above-mentioned supporter above-mentioned abutment surfaces annular section and constitute by having flexible synthetic resin thin plate,
Above-mentioned piezoelectric transducer does not contact with the above-mentioned inner peripheral surface of above-mentioned support portion with above-mentioned oscillating plate and is accommodated in the mode of the inside of above-mentioned support portion to above-mentioned oscillating plate and above-mentioned the 2nd piezoelectric element, is supported by above-mentioned support portion through above-mentioned connection unit.
4. piezoelectric sound producing unit as claimed in claim 1 further possesses:
With and above-mentioned support portion between clip above-mentioned synthetic resin thin plate mode be fixed on the protective layer of the annular on the above-mentioned synthetic resin thin plate,
Wherein, above-mentioned protective layer has above-mentioned the 1st piezoelectric element and the above-mentioned the 1st of above-mentioned piezoelectric transducer drawn with conductive part and is accommodated in inner such gauge fully.
5. piezoelectric sound producing unit as claimed in claim 4, wherein:
Above-mentioned protective layer is made up of another synthetic resin thin plate that sticks on via adhesive linkage on the above-mentioned synthetic resin thin plate.
6. piezoelectric sound producing unit as claimed in claim 1 is characterized in that:
Above-mentioned electric insulation layer is to apply insulating resin cream and the thick film that forms, and above-mentioned conductive layer is coating electrically conductive property resin plaster and the thick film that forms.
7. piezoelectric sound producing unit possesses:
With the peripheral facial mode of reserving annular piezoelectric element is bonded on the oscillating plate and the piezoelectric transducer that constitutes;
Support the supporter of the outer part of above-mentioned oscillating plate;
Link the above-mentioned outer part of above-mentioned oscillating plate and the connection unit of above-mentioned supporter,
It is characterized in that above-mentioned connection unit forms by having flexible synthetic resin thin plate, be configured with crossing on the above-mentioned peripheral face of above-mentioned oscillating plate and above-mentioned support portion, so that above-mentioned oscillating plate can body vibration,
Above-mentioned piezoelectric element have from the teeth outwards the 1st electrode and overleaf on have the 2nd electrode,
Above-mentioned the 2nd electrode is engaged with on the above-mentioned oscillating plate,
Extend to the extension on above-mentioned the 1st electrode being provided with the above-mentioned peripheral face of crossing above-mentioned vibrating body on the above-mentioned synthetic resin thin plate integratedly,
Above-mentioned synthetic resin thin plate is provided with the 1st wiring pattern that is connected with above-mentioned the 1st electrode, with the 2nd wiring pattern that is connected with above-mentioned oscillating plate,
Above-mentioned the 1st wiring pattern extends on the above-mentioned extension of above-mentioned synthetic resin thin plate.
8. voltage acoustic generator as claimed in claim 7, wherein:
Above-mentioned piezoelectric element is the piezoelectric element of single side or double-side type.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004215888 | 2004-07-23 | ||
| JP215888/2004 | 2004-07-23 | ||
| PCT/JP2005/013570 WO2006009279A1 (en) | 2004-07-23 | 2005-07-25 | Piezoelectric sound producing unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101027937A CN101027937A (en) | 2007-08-29 |
| CN101027937B true CN101027937B (en) | 2012-11-28 |
Family
ID=35785380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580024867XA Expired - Fee Related CN101027937B (en) | 2004-07-23 | 2005-07-25 | Piezoelectric sound producing unit |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4729496B2 (en) |
| KR (1) | KR101145231B1 (en) |
| CN (1) | CN101027937B (en) |
| WO (1) | WO2006009279A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4185946B2 (en) * | 2006-07-20 | 2008-11-26 | ホシデン株式会社 | Piezoelectric electroacoustic transducer |
| CN102262875A (en) * | 2010-05-28 | 2011-11-30 | 梅迪奇创意股份有限公司 | Broadcast fixture |
| JP5677780B2 (en) * | 2010-07-28 | 2015-02-25 | 日本セラミック株式会社 | Ultrasonic transceiver |
| CN101917657A (en) * | 2010-08-31 | 2010-12-15 | 广州市番禺奥迪威电子有限公司 | Piezoelectric loudspeaker |
| CN103621112B (en) * | 2011-06-27 | 2016-10-12 | 北陆电气工业株式会社 | Piezoelectric vibration element |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03797Y2 (en) * | 1980-07-24 | 1991-01-11 | ||
| JPH02214299A (en) * | 1989-02-14 | 1990-08-27 | Matsushita Electric Ind Co Ltd | Piezoelectric speaker |
| JP2672372B2 (en) * | 1989-07-07 | 1997-11-05 | シチズン時計株式会社 | Music box pickup device |
| JPH0339999U (en) * | 1989-08-28 | 1991-04-17 | ||
| JPH0375698U (en) * | 1989-11-27 | 1991-07-30 | ||
| JPH03175800A (en) * | 1989-12-04 | 1991-07-30 | Onkyo Corp | Piezoelectric speaker |
| JPH04132497A (en) * | 1990-09-25 | 1992-05-06 | Iwatsu Electric Co Ltd | Plane speaker |
| JP4060895B2 (en) * | 1995-12-25 | 2008-03-12 | 北陸電気工業株式会社 | Piezoelectric diaphragm |
| JP4163377B2 (en) * | 1998-11-05 | 2008-10-08 | 松下電器産業株式会社 | Piezoelectric speaker and speaker system |
| JP2000184495A (en) * | 1998-12-14 | 2000-06-30 | Taiyo Yuden Co Ltd | Piezoelectric acoustic device |
| JP4302857B2 (en) * | 2000-05-16 | 2009-07-29 | 北陸電気工業株式会社 | Piezoelectric sounder |
| JP2002238094A (en) * | 2001-02-08 | 2002-08-23 | Murata Mfg Co Ltd | Piezoelectric acoustic part and method for manufacturing the same |
-
2005
- 2005-07-25 JP JP2006529317A patent/JP4729496B2/en active Active
- 2005-07-25 CN CN200580024867XA patent/CN101027937B/en not_active Expired - Fee Related
- 2005-07-25 WO PCT/JP2005/013570 patent/WO2006009279A1/en active Application Filing
- 2005-07-25 KR KR1020077004305A patent/KR101145231B1/en active IP Right Grant
Non-Patent Citations (1)
| Title |
|---|
| JP平3-39999U 1991.04.17 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101027937A (en) | 2007-08-29 |
| WO2006009279A1 (en) | 2006-01-26 |
| KR20070048735A (en) | 2007-05-09 |
| KR101145231B1 (en) | 2012-05-25 |
| JPWO2006009279A1 (en) | 2008-05-01 |
| JP4729496B2 (en) | 2011-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5605433B2 (en) | Piezoelectric vibration device | |
| WO2014079376A1 (en) | Electroacoustic transducer | |
| CN109599267A (en) | Monolithic electronic component and plate with monolithic electronic component | |
| JPS62173814A (en) | Mounting unit for surface acoustic wave element | |
| CN109524238A (en) | Monolithic electronic component and plate with the monolithic electronic component | |
| US7447324B2 (en) | Piezoelectric sounding body and electronic device using the same | |
| JP2007329431A (en) | Piezoelectric exciter | |
| CN101027937B (en) | Piezoelectric sound producing unit | |
| JP2606249Y2 (en) | Ultrasonic probe | |
| JP4302857B2 (en) | Piezoelectric sounder | |
| JP2019149495A (en) | Piezoelectric actuator, vibration generation device, and electronic device | |
| JP2004015767A (en) | Piezoelectric sounding body and piezoelectric electroacoustic transducer using piezoelectric sounding body | |
| JP2003078995A (en) | Piezoelectric acoustic device | |
| JPH09182189A (en) | Piezoelectric diaphragm | |
| JP2004364334A (en) | Piezoelectric acoustic transducer | |
| JP5113362B2 (en) | Piezoelectric sounder | |
| JP6035775B2 (en) | Parametric speaker and manufacturing method thereof | |
| CN112312282B (en) | Film horn assembly, electronic equipment and preparation method of film horn assembly | |
| JP2003125492A (en) | Piezoelectric acoustic device | |
| JPH0698395A (en) | Sound source diaphragm | |
| JP2003134852A (en) | Piezoelectric driver element for conveying equipment | |
| JP2003158794A (en) | Piezoelectric acoustic unit | |
| JP2003125491A (en) | Piezoelectric acoustic device | |
| JPS6133512B2 (en) | ||
| JPH11355892A (en) | Piezoelectric diaphragm and piezoelectric acoustic component using the piezoelectric diaphragm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20210725 |