JPS636725Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a large magnifying glass with a handle, and its purpose is to solve the problem of spontaneous fires caused by concentrating sunlight when a large lens is left unattended. The purpose is to provide a magnifying glass with a novel structure that does not exist before.

That is, the magnifying glass of this invention is a large magnifying glass having a grip handle 1, and two semicircular light-shielding plates 3 and 4 that cover the lens surface of the large lens 2 are attached to the pivot portion 5 of the handle in the left-right direction. It is pivoted by pin 6 so that it can be opened and closed.
In addition, the grip handle 1 is provided with a slide operation lever 7, and the slide operation lever 7 has a horizontally elongated hole 8,
9 are engaged with the protruding pins 13, 14 of the light shielding plates 3, 4, so that the light shielding plates 3, 4 are opened as shown in FIG. When the lever 7 is released, the lever returns to its original position due to the biasing force of the spring 10, and the light shielding plates 3 and 4 move to the first position.
The feature is that it closes automatically as shown in the figure.

In this embodiment, the large lens 2 is a large-diameter Fresnel lens with a diameter of about 12 cm, and a small-diameter convex lens portion 2a is integrally provided in a portion thereof. The semicircular light-shielding plates 3 and 4 have protruding pieces 3a and 4a that are supported by pins on the pivot portion 5 of the handle, and the protruding pins 13 and 14 of the protruding pieces 3a and 4a are connected to the slide operating lever 7. The horizontally elongated holes 8 and 9 are engaged with each other.

The slide operation lever 7 is made of a plastic product with a T-shaped front surface and a finger hook protrusion 7a.
It is fitted into the grip handle 1 so as to be able to move up and down with a portion protruding from the upper end opening 1a thereof, and is biased upward by a coil spring 10 housed within the handle 1. Therefore, in a normal state, the slide operating lever 7 is pushed up as shown in FIGS. 1 and 2 to close the light shielding plates 3 and 4, and in this state, the lower end surface of the finger hook projection 7a is When the slide operation lever 7 is pushed down until it comes into contact with the edge of the handle opening 1a, the light shielding plates 3 and 4 are opened as shown in FIG. 3 and can be used as a magnifying glass. After use, when you release your hand from the slide operating lever 7, the lever 7 is pushed up by the elasticity of the spring 10.
Since the two light-shielding plates 3 and 4 close automatically as shown in FIG. 1, even if you forget to put it away in a fire-prone area exposed to sunlight, there will be no problem of spontaneous fires caused by lens condensation.

Since the magnifying glasses of this invention have the structure described above, there is no danger of spontaneous fires occurring due to light condensing by the large lens, and it has a completely new structure that has never existed before, making it safe for children and others to use. A magnifying glass can be provided.

[Brief explanation of the drawing]

FIG. 1 is a front view of the magnifying glass of this invention with the light-shielding plate closed, FIG. 2 is a partially cutaway side view thereof, and FIG. 3 is a front view of the magnifying glass with the light-shielding plate open. 1...Grip handle, 2...Large lens, 3, 4...Semicircular light shielding plate, 5...Pivot part, 6...Pivot pin,
7...Slide operation lever, 8, 9...Horizontal elongated hole,
10...Spring, 13, 14...Protruding pin of light shielding plate.

Claims (1)

[Scope of utility model registration request] In a large magnifying glass with a grip handle, two semicircular light-shielding plates covering the large lens surface are supported by pins on a pivot part of the handle portion so as to be openable and closable in the left and right direction, and are slidable on the grip handle. A lever is provided, and the protruding pins of both the light shielding plates are engaged with the horizontally elongated holes of the slide operation lever, so that the light shielding plates are opened by pressing down the slide operation lever, and the hand is removed from the slide operation lever. A magnifying glass characterized in that when released, the lever returns to its original position by the biasing force of a spring, and the light shielding plate automatically closes.