A magnifying glass that can be converted into multiple times

Abstract

The invention discloses a magnifying glass capable of multi-fold conversion, which comprises a housing and a mirror body. The mirror body includes a lens and a connecting handle connected to the lens. The housing is provided with a plurality of positioning holes for positioning the mirror body. The positioning holes Arranged at regular intervals along the length of the housing, the mirror bodies are respectively fixed in the positioning holes through the connecting rods, the housing is provided with an orientation mechanism and a locking hole, and a slide rail assembly is provided on the housing, and the slide rail assembly package slides vertically One end of the vertical slide rail extends to the observation end and communicates with the locking hole, and the observation end is provided with a locking mechanism for fixing the mirror body in the use position; the mirror body can pass through the slide rail assembly, from where it is positioned The hole slides into the locking hole on the viewing end and locks in the positioning hole for use. When using the magnifying glass of the present invention, the convex lens can be converted to achieve different magnifications of the observed object, and the observer uses a magnifying glass with a suitable magnification to observe the object clearly.

Description

technical field [0001] The invention relates to the technical field of ophthalmic lens medical devices, in particular to a magnifying glass capable of multi-fold conversion. Background technique [0002] Magnifying glass: A simple visual optical device used to observe small details of objects. It is a converging lens with a focal length much smaller than the apparent distance of the eye. The size of the image of an object on the retina of the human eye is proportional to the angle (angle of view) that the object opens to the eye. [0003] The larger the angle of view, the larger the image, and the better the ability to distinguish the details of the object. Moving closer to an object increases the viewing angle, but is limited by the ability of the eye to focus. Use a magnifying glass, hold it close to the eye, and place the object within its focal point to form an upright virtual image. The function of the magnifying glass is to enlarge the angle of view. Observation me...

AI Technical Summary

Problems solved by technology

[0005] 1. Because a magnifying glass is equipped with only one convex lens, the magnification of the magnifying glass is limited. When the observed object is large, the observer’s field of view is small, and the observer needs to spend a long time observing. When the observed object is small, due to The magnification is small, so the observer cannot see the object more clearly

[0006] 2. The observer usually places the magnifying glass in the pocket of the clothes or in the carry-on bag. If the magnifying glass is stored in the pocket of the clothes, the magnifying glass will easily fall out of the pocket and be lost during the walk of the observer; In the carry-on bag, when the observer is walking, the magnifying glass stored in the carry-on bag will be mixed with other objects in the carry-on bag. observer time

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