Blade Drives, Cameras, and Portable Electronics

Abstract

The present invention relates to blade drives, cameras and portable electronic devices. The object of the present invention is to reduce the size and weight of the entire mounted device and simplify the drive by using a shape memory alloy for the driving part in an optical device including a blade mounted on the lens or in a space in the lens. , Simplification of assembly. The blade driving device (100) has: a base member (10) supporting the blade; a blade (21); a plate member (22) having a diameter and forming a blade chamber; a plate member (23) having a diameter forming the blade chamber and covering the blade ); a ring member (30) supported by a shaft freely rotatable and provided with a connecting portion (31) connected to the blade; an elastic member (40) held by the base member and the ring member; held by the a shape memory alloy (50) of the base member and the ring member; a holding member (51) for holding the shape memory alloy; and wiring (70) for power supply.

Description

technical field [0001] The present invention relates to an invention related to a blade driving device and the like used in an imaging device and the like. Background technique [0002] With the rapid development of photographic technology, blade drive devices and lens drive devices are widely used in numerous photographic devices. The application of optical devices with blade drive devices to various portable electronic devices, such as cellular phones, tablet computers, etc., is especially accepted by consumers. [0003] The blade drive device is a device that drives one or more blades to change the state of the opening. It is used in various optical units such as cameras as shutters, apertures, apertures and shutters, filters, etc. The blade driving device mounted on or in the lens driving device, etc., on an optical device that moves the lens, due to the size and weight of the driving part of the blade driving device, protrusions in multiple directions depending on the ...

AI Technical Summary

Problems solved by technology

[0004] Although there are moving units using shape memory alloys with a small structural footprint, it is necessary to increase the length of shape memory alloys when a large amount of change is required

[0005] In addition, when using a shape memory alloy, if one of the two ends is directly fixed to the member for driving the blade, it must be movable together with the energization path, thereby requiring an inefficient space for the movable amount of the energization path. The path may become a disturbance factor beyond the necessary amount of stretching, thus potentially affecting the actuation of the member used for blade actuation

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