US20070109412A1
Active / In Force
US
⏱️ 0.0 years remaining
Driving apparatus
Assignee: Konica Minolta Inc
•
Filing: 2006-11-13
•
Granted: —
•
Expires: 2026-11-13
Abstract
Abstract In an auto image stabilization system, a driving member formed as a wire of shape memory alloy (SMA) is retained by a projection of an image capturing unit. A distance Lb from the rotation center of an elastic deforming part to center of gravity (point of application) of the image capturing unit is longer than a distance La from the rotation center of the elastic deforming part to the projection (power point). In the configuration, equivalent mass (apparent mass) of the image capturing unit becomes (Lb/La) times, and it causes deterioration in response. Consequently, the driving member having an ellipse-shaped section in which a value obtained by dividing the width in the longer direction of the section by the width in the shorter direction is 1.3 or larger is employed. As a result, heat dissipation of the driving member increases, so that response in the SMA actuator can be properly improved.
Inventors
- 👤 Yoshihiro Hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:55
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/60; H04N23/50; H04N23/68; H04N23/681; H04N23/6812; H04N23/682; H04N23/685; H04N23/687; G; G03; G03B; G03B2205/00; G03B2205/0007; G03B2205/0023; G03B2205/0053; G03B2205/0076
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
1 . A driving apparatus comprising: (a) a movable part; and (b) an actuator connected to said movable part and driving said movable part, said actuator having a first elastic part and a second elastic part which are connected to said movable part in a push-pull relation, at least one of said first elastic part and said second elastic part being formed as a wire made of a shape memory alloy, and a sectional shape of said wire being flattened in shape.
Claim 2
Dependent Claim
82 words
1 . A driving apparatus comprising: (a) a movable part; and (b) an actuator connected to said movable part and driving said movable part, said actuator having a first elastic part and a second elastic part which are connected to said movable part in a push-pull relation, at least one of said first elastic part and said second elastic part being formed as a wire made of a shape memory alloy, and a sectional shape of said wire being flattened in shape.
Claim 3
Dependent Claim
21 words
2 . The driving apparatus according to claim 1 , wherein said sectional shape of said wire is an ellipse shape.
Claim 4
Dependent Claim
43 words
3 . The driving apparatus according to claim 1 , wherein length d 1 in a longer direction and length d 2 in a shorter direction with regard to said sectional shape of said wire satisfy the following equation; d 1 /d 2≧1.3.
Claim 5
Dependent Claim
28 words
4 . The driving apparatus according to claim 1 , wherein sectional area S of said wire satisfies the following equation; 80 μm 2 ≦S≦5,030 μm 2 .
Claim 6
Dependent Claim
67 words
5 . The driving apparatus according to claim 1 , further comprising: (c) a sensor for obtaining a measurement value with regard to a driving of said movable part; and (d) a controller for passing current to said wire on basis of a deviation between a drive target value of said movable part and said measurement value in order to control a driving of said movable part.
Claim 7
Dependent Claim
92 words
6 . A driving apparatus comprising: (a) a movable part; and (b) an actuator connected to said movable part and driving said movable part, said actuator having a first elastic part and a second elastic part which are connected to said movable part in a push-pull relation, at least one of said first elastic part and said second elastic part being formed as a plurality of wires made of a shape memory alloy, and said plurality of wires stretching so as to be adjacent to each other along a same stretch route.
Claim 8
Dependent Claim
92 words
6 . A driving apparatus comprising: (a) a movable part; and (b) an actuator connected to said movable part and driving said movable part, said actuator having a first elastic part and a second elastic part which are connected to said movable part in a push-pull relation, at least one of said first elastic part and said second elastic part being formed as a plurality of wires made of a shape memory alloy, and said plurality of wires stretching so as to be adjacent to each other along a same stretch route.
Claim 9
Dependent Claim
26 words
7 . The driving apparatus according to claim 6 , wherein each of said plurality of wires has a circular sectional shape having a same diameter.
Claim 10
Dependent Claim
67 words
8 . The driving apparatus according to claim 6 , further comprising: (c) a sensor for obtaining a measurement value with regard to a driving of said movable part; and (d) a controller for passing current to said wire on basis of a deviation between a drive target value of said movable part and said measurement value in order to control a driving of said movable part.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.