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A Direct-Push Mechanical 3D Iris Device Based on Superelastic Shape Memory Alloy Blades

A technology of memory alloy and memory alloy wire, which is applied in the direction of camera, aperture, optics, etc., and can solve the problem of small opening diameter of the head

Active Publication Date: 2021-09-28
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 direct-push mechanical 3D iris device based on superelastic shape memory alloy blades

Method used

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  • A Direct-Push Mechanical 3D Iris Device Based on Superelastic Shape Memory Alloy Blades
  • A Direct-Push Mechanical 3D Iris Device Based on Superelastic Shape Memory Alloy Blades
  • A Direct-Push Mechanical 3D Iris Device Based on Superelastic Shape Memory Alloy Blades

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Embodiment Construction

[0035] The purpose of the present invention is to provide a direct-push mechanical 3D iris device based on superelastic shape memory alloy blades. The iris blades are made of superelastic shape memory alloys. The shape of the blades can be changed. When the blades are closed, the blades are attached to the iris shell. After the blade is pushed out, due to the superelasticity of the blade, it returns to the preset curved shape, which overcomes the shortcomings of the traditional 3D spherical iris shell head that needs to be designed as a spherical surface, so that the iris device can be designed as a straight cylinder, and the head diameter increases. .

[0036] The mechanical iris device includes the following features:

[0037] Feature 1: The direct-push mechanical 3D iris device includes a superelastic shape memory alloy blade, an iris outer shell, and an iris inner shell.

[0038] Feature 2: The free shape of the superelastic shape memory alloy blade is a predetermined cur...

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Abstract

The present invention proposes a direct-push mechanical 3D iris device based on superelastic shape memory alloy blades, including an iris mechanism module and a drive module; the iris mechanism module includes blades, an outer shell and an inner shell; the blades are superelastic shape memory alloy blades; The bottom of each superelastic shape memory alloy blade is fixed on the same blade ring, and the free shape of all superelastic shape memory alloy blades is the hemispherical shape when the blade is closed; the driving module can drive the blade ring to move in the axial direction; when the driving module drives the blade When the ring retracts in the axial direction, the blades of the superelastic shape memory alloy are opened, deformed by the action of the outer shell and the inner shell, and retracted between the outer shell and the inner shell; when the driving module drives the blade ring to extend axially, the superelastic shape Memory alloy blades protrude from between the outer shell and the inner shell and restore the free shape. The invention overcomes the disadvantage that 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 head diameter is increased.

Description

technical field [0001] The invention relates to a mechanical iris device, in particular to a direct-push 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B9/02
CPCG03B9/02
Inventor 朱继宏王文龙谷小军王骏张亚辉张卫红
Owner NORTHWESTERN POLYTECHNICAL UNIV
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