CN2322217Y

CN2322217Y - Convex lens imaging demonstration instrument for children

Info

Publication number: CN2322217Y
Application number: CN 98202583
Authority: CN
Inventors: 徐万茂
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-23
Filing date: 1998-03-23
Publication date: 1999-06-02
Anticipated expiration: 2008-03-23

Abstract

The utility model relates to a convex lens imaging demonstration instrument for children, which is composed of a guide track, an optical bench, a candle holder, a candle, a convex lens and an imaging screen. The utility model is characterized in that one side of the guide track is provided with graduations, the guide bench of the optical bench is matched with the top angle of the guide track, the middle of the guide bench is provided with a graduation pointer which can indicate the distance on a scale, the upper part of the optical bench is provided with a guide slot, the lower part of the convex lens and the candle holder are both provided with latches which can be inserted in the guide slot, both sides of one latch are respectively provided with a positioning protrusion, and the imaging screen can directly be inserted in the guide slot. The utility model has the advantages of low cost, simple assembly and operation and visual understanding. The utility model is conveniently used for popularizing optical knowledge for children.

Description

Children use convex lens image-forming demonstration instrument

The utility model relates to a kind of exploitation children's intelligence, makes children know the teaching aid of the rule of the imaging effect of convex lens and imaging size, and especially a kind of children are with convex lens image-forming demonstration instrument.

This quasi-instrument of Shi Yonging in the past, complex structure, price is more expensive, and floor area is big, and general family and primary school do not possess this condition, and these important optical knowledges can not be popularized in children.

The purpose of this utility model provides a kind of with low cost, and simple and convenient assembly is visual and understandable, be convenient to popularize the convex lens image-forming demonstration instrument of optical knowledge, assemble and demonstrate operation in person by children, make children know that convex lens have the rule of imaging effect and imaging size, understand the application of convex lens.

Followingly with reference to accompanying drawing 1-3 structure of the present utility model is described, the utility model is made of guide rail (1), optical bench (2), candlestick (3), candle (4), convex lens (5), imaging screen (6); The section of guide rail (1) is a herringbone, one side has scale, the guide holder (2a) of optical bench (2) is complementary with the apex angles of guide rail (1), the distance that in the middle of the guide holder (2a) tuning drive gear (2c) is arranged but marked on the indicating graduation chi, optical bench (2) upper tubular position has gathering sill (2b), convex lens (5) and candlestick (3) bottom all have latch (7), there is locator protrusions (7a) latch (7) both sides, bottom, convex lens (5) and candlestick (3) but nationality latch (7) inject in the optical bench (2), imaging screen (6) can directly inject in the gathering sill (2b).

Assemble demonstrator by Fig. 1 before the demonstration, and regulate distance between candle, lens, the imaging screen, observe and be recorded under the various different situations, what become on the imaging screen is what kind of picture of candle, imaging has any relation with the distance of convex lens and candle and convex lens and imaging screen, by this test, make children know that convex lens imaging size is clocklike, when convex lens near apart from imaging screen, the picture that dwindles that is become when far away apart from candle, far away apart from imaging screen when convex lens, when near, what become is the picture that amplifies apart from candle.Become the observation and the practice of phase by this kind convex lens, make children understand the aufbauprinciple of camera projector, projector, because these all are to rely on the principle of convex lens imaging to make.

The utility model has the advantages that with low cost, assembling use simple, visual and understandable, effect is obvious, is convenient to popularize in children optical knowledge.

Description of drawings:

Fig. 1 is a stereographic map of the present utility model;

Fig. 2 is the optical bench structural drawing among Fig. 1;

Fig. 3 is the convex lens among Fig. 1 and the latch of candlestick lower end.

Embodiment, Fig. 1-the 3rd, enforcement illustration of the present utility model, guide rail (1), optical bench (2) convex lens (5), all available plastic injection-moulded the making of candlestick (3), imaging screen (6) is made of paper, candlestick (3) and convex lens (5) bottom have the latch (7) with spline structure, and latch (7) can be made with candlestick (3) and convex lens (5) moulding.

Claims

1, a kind of children is characterized in that with convex lens image-forming demonstration instrument it is made of guide rail (1), optical bench (2), candlestick (3), candle (4), convex lens (5), imaging screen (6); The section of guide rail (1) is a herringbone, one side has scale, the guide holder (2a) of optical bench (2) is complementary with the apex angles of guide rail (1), tuning drive gear (2c) is arranged in the middle of the guide holder (2a), optical bench (2) upper tubular partly has gathering sill (2b), convex lens (5) and candlestick (3) bottom all have the latch (7) that can insert in the gathering sill, and there is locator protrusions (7a) both sides of latch (7), and imaging screen (6) can directly inject in the gathering sill (2b).