A rotary mechanical 3D iris device based on superelastic shape memory alloy blades

Abstract

The invention proposes a rotary mechanical 3D iris device based on a superelastic shape memory alloy blade, including an iris mechanism module and a drive module; the iris mechanism module includes a blade, an outer shell and an inner shell; the blade is a superelastic shape memory alloy blade; the superelastic The free shape of the shape memory alloy blade is the curved surface shape when the blade is closed; when the outer shell and the inner shell rotate relative to each other to drive the blade to open, the superelastic shape memory alloy blade is screwed into the space between the outer shell and the inner shell, and is formed by the action of the outer shell and the inner shell. Deformation; when the outer shell and the inner shell are relatively rotated and the driving blades are closed, the superelastic shape memory alloy blades are unscrewed from between the outer shell and the inner shell to restore the free shape. The invention uses a superelastic shape memory alloy to make blades, which can be deformed, which overcomes the disadvantage that the head of the traditional 3D spherical iris shell needs to be designed as a spherical surface, so the iris device can be designed as a straight cylinder, and the diameter of the head is increased.

Description

technical field [0001] The invention relates to a mechanical iris device, in particular to a rotary mechanical 3D iris device based on superelastic shape memory alloy blades. Background technique [0002] There are two types of iris mechanisms: 2D (plane) and 3D (spherical). The most common application of the planar iris mechanism is the camera aperture. This aperture is composed of multiple overlapping arc-shaped thin metal blades. The size of the central circular aperture is changed by the clutch of the blades. From 18 to 18, the more blades, the closer the aperture is to a circle. In order for the 3D iris mechanism to allow the curved blades to enter and exit smoothly, the head of the housing is usually designed to have the same curvature as the blades, most of which are spherical. The spherical iris mechanism means that the blades are on a spherical surface, and the blades stretch out to form a spherical surface. The 3D iris has many potential applications, such as th...

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Problems solved by technology

[0004] In order to overcome the problem of the small opening of the head of the existing iris mechanism, the present invention designs a rotary mechanical 3D iris device based on superelastic shape memory alloy blades

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