US4979275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for magnifying displacement of piezoelectric element or the like and method for producing same
Assignee: Brother Industries Ltd
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Filing: 1989-08-23
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Granted: 1990-12-25
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Expires: 2009-08-23
Abstract
Abstract A method of producing a device for magnifying displacement of a piezoelectric element adapted to be displaced by application of voltage thereto. The method includes a first step of forming a movable member integrally with a frame through a connecting portion in such a manner as a space for inserting therein a piezoelectric element is defined between the movable member and a base portion of the frame; a second step of fixing the leaf spring to the frame and the movable member; and a third step of forming a separation groove in the connecting portion to separate the movable member from the frame.
Inventors
- 👤 Atsuo Sakaida
- 👤 Yoshiyuki Ikezaki
- 👤 Akira Iriguchi
- 👤 Yasuji Chikaoka
- 👤 Yasuo Imoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:07
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/22; B; B41; B41J; B41J2/00; B41J2/22; B41J2/23; B41J2/27; B41J2/295; H02N2/02; H02N2/04; H02N2/043; Y; Y10; Y10T; Y10T29/00; Y10T29/42; Y10T29/49; Y10T29/49789; Y10T29/49796; Y10T29/49799
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
274 words
A method of producing a device for magnifying displacement of a piezoelectric element adapted to be displaced by application of voltage thereto, said device comprising: a frame extending substantially parallel to a direction of displacement of said piezoelectric element; a movable member fixed to one end of said piezoelectric element with respect to the direction of displacement; a first mount surface formed on said frame and extending substantially parallel to the direction of displacement; a second mount surface formed on said movable member and extending substantially parallel to the direction of displacement, said second mount surface being opposed to said first mount surface; a first leaf spring mounted at one end portion thereof on said first mount surface and extending substantially parallel to the direction of displacement; a second leaf spring mounted at its one end portion on said second mount surface and extending substantially parallel to the direction of displacement; and a rolling member fixed to other end portions of said first and second leaf springs, wherein when said piezoelectric element is displaced, said second leaf spring is displaced relative to said first leaf spring through said movable member to roll said rolling member, said method comprising: a first step of forming said movable member integrally with said frame through a connecting portion to define a space for inserting therein said piezoelectric element between said movable member and a base portion of said frame; a second step of fixing said first and second leaf springs to said frame and said movable member; and a third step of forming a separation groove in said connecting portion to separate said movable member from said frame.
Claim 2
Independent Claim
274 words
A method of producing a device for magnifying displacement of a piezoelectric element adapted to be displaced by application of voltage thereto, said device comprising: a frame extending substantially parallel to a direction of displacement of said piezoelectric element; a movable member fixed to one end of said piezoelectric element with respect to the direction of displacement; a first mount surface formed on said frame and extending substantially parallel to the direction of displacement; a second mount surface formed on said movable member and extending substantially parallel to the direction of displacement, said second mount surface being opposed to said first mount surface; a first leaf spring mounted at one end portion thereof on said first mount surface and extending substantially parallel to the direction of displacement; a second leaf spring mounted at its one end portion on said second mount surface and extending substantially parallel to the direction of displacement; and a rolling member fixed to other end portions of said first and second leaf springs, wherein when said piezoelectric element is displaced, said second leaf spring is displaced relative to said first leaf spring through said movable member to roll said rolling member, said method comprising: a first step of forming said movable member integrally with said frame through a connecting portion to define a space for inserting therein said piezoelectric element between said movable member and a base portion of said frame; a second step of fixing said first and second leaf springs to said frame and said movable member; and a third step of forming a separation groove in said connecting portion to separate said movable member from said frame.
Claim 3
Dependent Claim
20 words
The method as defined in claim 1, wherein said second step includes fixing said rolling member to said leaf springs.
Claim 4
Dependent Claim
28 words
The method as defined in claim 1, wherein said second step includes fixing said leaf springs formed independently of each other to said frame and said movable member.
Claim 5
Dependent Claim
59 words
The method as defined in claim 1, wherein said second step includes fixing a single spring member to said frame and said movable member, and said third step includes forming a split groove extending from an end of said spring member on said connecting portion side toward said rolling member to thereby form said first and second leaf springs.
Claim 6
Independent Claim
211 words
A method of producing a device for magnifying displacement of an elongated piezoelectric element adapted to be displaced by application of voltage thereto, comprising: a first step of forming an integral frame body having a main frame extending along one side of said piezoelectric element, a supporting portion for supporting one end of said piezoelectric element with respect to a direction of displacement of said piezoelectric element, a movable member mounted on the other end of said piezoelectric element with respect to the direction of displacement of said piezoelectric element, and a sub frame extending along the other side of said piezoelectric element opposite to said main frame; a second step of fixing a pair of leaf springs connected at one end with a rocking member to said main frame and said movable member; a third step of forming a first parting slit between said main frame and said movable member and a second parting slit between said movable member and said sub frame to separate said main frame, said movable member and said sub frame; a fourth step of fixing a quadri-hinged parallel link mechanism between said movable member and said sub frame; and a fifth step of fixing said piezoelectric element between said supporting portion and said movable member.
Claim 7
Independent Claim
211 words
A method of producing a device for magnifying displacement of an elongated piezoelectric element adapted to be displaced by application of voltage thereto, comprising: a first step of forming an integral frame body having a main frame extending along one side of said piezoelectric element, a supporting portion for supporting one end of said piezoelectric element with respect to a direction of displacement of said piezoelectric element, a movable member mounted on the other end of said piezoelectric element with respect to the direction of displacement of said piezoelectric element, and a sub frame extending along the other side of said piezoelectric element opposite to said main frame; a second step of fixing a pair of leaf springs connected at one end with a rocking member to said main frame and said movable member; a third step of forming a first parting slit between said main frame and said movable member and a second parting slit between said movable member and said sub frame to separate said main frame, said movable member and said sub frame; a fourth step of fixing a quadri-hinged parallel link mechanism between said movable member and said sub frame; and a fifth step of fixing said piezoelectric element between said supporting portion and said movable member.
Claim 8
Dependent Claim
41 words
The method as defined in claim 5, wherein said first step comprises injection-molding a mixture of metal powder and resin, heating a molding obtained above at a predetermined temperature, and sintering the molding at a predetermined temperature in an atmospheric gas.
Claim 9
Dependent Claim
25 words
The method as defined in claim 5, wherein said first step includes formation of a recess for inserting the other end of said leaf springs.
Claim 10
Dependent Claim
35 words
The method as defined in claim 5, wherein said first step includes formation of thin-walled portions of said movable member and said sub frame at a position where said quadri-hinged parallel link mechanism is fixed.
Claim 11
Dependent Claim
21 words
The method as defined in claim 5 further comprising a step of integrally forming said leaf springs with said rocking member.
Claim 12
Dependent Claim
36 words
The method as defined in claim 9 further comprising a step of fixing said rocking member to one end of a rocking arm and fixing the other end of said rocking arm to a printing wire.
Claim 13
Dependent Claim
21 words
The method as defined in claim 5, wherein said leaf springs are brazed to said main frame and said movable member.
Claim 14
Dependent Claim
23 words
The method as defined in claim 5, wherein said quadri-hinged parallel link mechanism is welded to said movable member and said sub frame.
Claim 15
Dependent Claim
24 words
The method as defined in claim 5, wherein said first and second parting slits are formed by laser cutting or wire-cut electrical discharge cutting.
Claim 16
Dependent Claim
70 words
The method as defined in claim 5, wherein said quadri-hinged parallel link mechanism comprises a pair of opposed parallel link plates and a bridge portion integrally connecting said parallel link plates, and said fourth step further comprising a step of mounting said parallel link plates on opposite side surfaces of said movable member and opposite side surfaces of said sub frame and a step of positioning said parallel link plates.
Claim 17
Dependent Claim
60 words
The method as defined in claim 5 further comprising a step of interposing between said supporting portion and said piezoelectric element a preload member for applying a given compression load to said piezoelectric element in a rest position of said piezoelectric element and a temperature compensating member having a characteristic of temperature-linear expansion contrary to that of said piezoelectric element.
Claim 18
Dependent Claim
73 words
The method as defined in claim 15, wherein said preload member has an inverted U-shaped configuration composed of an upper plate portion and a pair of side plate portions, and said interposing step comprises fixing said temperature compensating member to one end of said piezoelectric element, movably mounting said preload member on said supporting portion, and fixing said side plate portions of said preload member to opposite side surfaces of said supporting portion.
Claim 19
Dependent Claim
38 words
The method as defined in claim 6, wherein said meal powder is an alloy powder containing about 31 wt % or more of Ni, about 5 wt % or more of Co, and a residual quantity of Fe.
References Cited (Backward Citations)
US3460244A
Cited
US3524196A
Cited
US3624896A
Cited
US3614486A
Cited
US3649857A
Cited
US3955049A
Cited
JPS57187980A
Cited
US4435666A
Cited
US4589786A
Cited
US4547086A
Cited
US4518887A
Cited
US4672257A
Cited
US4570095A
Cited
US4675568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-24 | 1994-06-25 | 1994-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-24 | 1998-06-25 | 1998-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-24 | 2002-06-25 | 2002-12-25 | $7700.00 | Window Closed / Lapsed |