EP0704916B1
Expired / Lapsed
EP
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Output-enlarged piezoelectric clamp device
Assignee: NEC Corp
•
Filing: 1995-09-11
•
Granted: 1999-08-04
•
Expires: 2015-09-11
Abstract
No abstract record available.
Inventors
- 👤 Mitsunori Sano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:39
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/02; H02N2/04; H02N2/043
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
204 words
A piezoelectric clamp device comprising: a piezoelectric element (1); a pair of arms (3a, 3b) hinged at opposite ends of the
piezoelectric element (1) ; a substrate (5) hinged with opposite ends to the arms
(3a, 3b); the arms (3a, 3b) and the substrate (5) enlarging an
elongation of the piezoelectric element (1) in accordance
with a voltage applied to the piezoelectric element (1) by
the principles of lever and fulcrum; a single beam (6) connected with opposite ends (3e) to the
arms (3a, 3b), the single beam (6) comprising a flat
portion (6a) at the centre and inclined portions (6b)
disposed at the opposite sides of the flat portion (6a),
the inclined portions (6b) changing its angle with respect
to the flat portion (6a) upon displacement of the arms (3a,
3b), and a pair of clampers (9a, 9b) attached to the single beam
(6) in facing relation, each of the clampers (9a, 9b)
forming an angle (α) with each of the inclined portions
(6b) of the single beam (6) for opening and/or closing in
accordance with relative motion of the flat and inclined
portions (6a, 6b) of the single beam (6), so as to further
enlarge the elongation of the piezoelectric element (1).
Claim 2
Dependent Claim
71 words
A piezoelectric clamp device as recited in claim 1
wherein the beam (6) is composed of a strip comprising the
flat portion (6a) disposed at the center thereof and in
parallel with the direction of elongation of the
piezoelectric element (1) and the inclined portions (6b)
disposed at opposite sides of the flat portion (6a),
wherein each of the clampers (9a, 9b) is attached to each
of the inclined portions (6b).
Claim 3
Dependent Claim
41 words
A piezoelectric clamp device as recited in claim 1,
wherein the angle (α) is greater than 90 degrees when no voltage is
applied to the piezoelectric element (1) so that said
clampers (9a, 9b) contact each other at distal ends
thereof.
Claim 4
Dependent Claim
43 words
A piezoelectric clamp device as recited in claim 2,
wherein the angle (α) is smaller than 90 degrees when no voltage is
applied to the piezoelectric element (1) so that said
clampers (9a, 9b) do not contact each other at distal ends
thereof.
Claim 5
Dependent Claim
64 words
A piezoelectric clamp device as recited in claim 1,
wherein each of the clampers (9a, 9b) is composed of a
strip having a first portion (9d) and a second portion
(9c), said second portion (9c) connecting the clamps (9a,
9b) to said beam (6), so as to form said angle (α) between
said first and second portions (9d, 9c) of each clamp (9a,
9b).
Claim 6
Dependent Claim
44 words
A piezoelectric clamp device as recited in claim 1,
further comprising a first and a second pair of hinges (4a,
4b; 2a, 2b) provided between said substrate (5) and said
arms (3a, 3b) and said piezoelectric element (1) and said
arms (3a, 3b), respectively.
Claim 7
Dependent Claim
31 words
A piezoelectric clamp device as recited in claim 1,
further comprising rivets (7) connecting said arms (3a, 3b)
and said beam (6) at a distal end of the arms (3a, 3b).
Claim 8
Dependent Claim
83 words
A piezoelectric clamp device as recited in claim 1,
wherein said substrate (5) is connected to said arms (3a,
3b) between the connection points of said piezoelectric
element (1) and said arms (3a, 3b) and the connection
points of said beam (6) and said arms (3a, 3b), so that the
portion of said arms (3a, 3b) between said substrate (1)
and said piezoelectric element (1) is smaller than a
portion of said arms (3a, 3b) between said substrate (1)
and said beam (6).
References Cited (Backward Citations)
No citation records indexed.
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