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EP0536637A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Piezo-electric device type actuator

Assignee: Fujitsu Ltd
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Filing: 1992-10-01
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Granted: —
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Expires: 2012-10-01
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Abstract

Abstract A piezo-electric device type actuator which is less susceptible to damages to joint portions of between a laminated piezo-electric device and a base member or a movable block. The piezo-electric device type actuator includes a laminated piezo-electric device having a plural number of piezo-electric ceramics laminated to a predetermined length; a stationary base member; a pair of resilient plates extended along opposite lateral side surfaces of the laminated piezo-electric device, respectively, and each welded at one end to the base member; and a movable block welded to the other end of each of the resilient plates while applying a predetermined compressive force to the laminated piezo-electric device. The laminated piezo-electric device is fixed to the base member and movable block by welding to provide bondage of high reliability between these parts.

Inventors

  • 👤 Mitsuhiro c/o FUJITSU LIMITED Mori

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 04:29
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/22; B41J2/23; B41J2/27; B41J2/295; H; H10; H10N; H10N30/00; H10N30/50; H10N30/80; H10N30/88; H10N30/886; H02; H02N; H02N2/00; H02N2/02; H02N2/04; H02N2/043

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 134 words
A piezo-electric device type actuator, comprising: a laminated piezo-electric device including a plural number of laminated piezo-electric ceramics layers, a plural number of internal electrodes sandwiched between the respective piezo-electric ceramics layers, a first external electrode connected to alternate ones of said internal electrodes, and a second external electrode connected to the other alternate ones of said internal electrodes, said laminated piezo-electric device having first and second side surfaces on the opposite lateral sides thereof; a stationary base member; a pair of resilient plates extended along the first and second side surfaces of said laminated piezo-electric device, respectively, and each welded at one end to said base member; and a movable block welded to the other end of each of said resilient plates while applying a predetermined compressive force to said laminated piezo-electric device.
Claim 2
Dependent Claim 134 words
A piezo-electric device type actuator, comprising: a laminated piezo-electric device including a plural number of laminated piezo-electric ceramics layers, a plural number of internal electrodes sandwiched between the respective piezo-electric ceramics layers, a first external electrode connected to alternate ones of said internal electrodes, and a second external electrode connected to the other alternate ones of said internal electrodes, said laminated piezo-electric device having first and second side surfaces on the opposite lateral sides thereof; a stationary base member; a pair of resilient plates extended along the first and second side surfaces of said laminated piezo-electric device, respectively, and each welded at one end to said base member; and a movable block welded to the other end of each of said resilient plates while applying a predetermined compressive force to said laminated piezo-electric device.
Claim 3
Dependent Claim 73 words
A piezo-electric device type actuator as defined in claim 1, further comprising: a first block interposed between said base member and one end of said laminated piezo-electric device, and securely welded to one end of each of said paired resilient plates; and a second block interposed between said movable block and the other end of said laminated piezo-electric device, and securely welded to the other end of each of said paired resilient plates.
Claim 4
Dependent Claim 61 words
A piezo-electric device type actuator as defined in claim 1, wherein said first and second external electrodes are mounted on third and fourth lateral side surfaces of said laminated piezo-electric device disposed perpendicularly to said first and second lateral side surfaces, said first external electrode being connected to a drive circuit and said second external electrode being connected to the ground.

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