Flat shape memory cable body and driving device using same

Abstract

The present invention provides a flat shape-memory cable body capable of easily incorporating a plurality of shape-memory alloy wires into a base member or the like, and a drive device using the cable body. The flat shape memory cable body (7) has shape memory alloy wires (2, 2...) that shrink due to heat generated when energized, and supports a plurality of shape memory alloy wires (2, 2...) in a parallel arrangement with intervals therebetween. ...) has an insulating and flexible supporting substrate (8), and electrode connection exposures for exposing the ends of the shape memory alloy wires (2, 2...) are formed at both ends of the supporting substrate (8). Department (9, 9).

Description

technical field [0001] The present invention relates to a flat shape-memory cable body used in a drive actuator or the like utilizing the characteristics of a shape-memory alloy and a drive device using the cable body. Background technique [0002] Conventionally, drive devices that utilize the characteristics of shape memory alloys, that is, shrinkage when heated above a certain temperature (operating temperature) by energization, have been widely used in lens drive actuators of cameras, etc. (for example, refer to Patent Document 1). [0003] The driving device has an insulating base member and a movable member facing the base member, and a plurality of shape memory alloy wires contracted by heat generated during energization are arranged in parallel between the opposing surfaces. When energized, the shape memory alloy wire is pressed by the movable member that urges the base member side by the urging mechanism to be in a bent state, and when energized, the movable member...

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Problems solved by technology

[0008] However, in the prior art as described above, since the shape memory alloy wires are very thin, and both ends of each shape memory alloy wire are fixed to the base member (electrode), unnecessary slack occurs, or each The slack of each shape-memory alloy wire is also different, and it is very difficult to arrange the shape-memory alloy wires in the same bending state. In addition, there are differences in the arrangement of the shape-memory alloy wires that make the movable parts different. Unstable motion and other problems that make it difficult to ensure a certain quality

[0009] In addition, in the manufacturing process of such a driving device, it takes a lot of time to install each shape memory alloy wire on the base member. On the other hand, if a plurality of shape memory alloy wires are to be installed On the seat part, there is a danger that the shape memory alloy wires are entangled with each other, and the operability is extremely poor.

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