CN87201744U

CN87201744U - Teaching model of sidereal day and solar day

Info

Publication number: CN87201744U
Application number: CN 87201744
Authority: CN
Inventors: 刘学光
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-02-06
Filing date: 1987-02-06
Publication date: 1988-01-13

Abstract

The utility model discloses a teaching model of sidereal day and solar day, which belongs to demonstrating tools used by geography teaching. The utility model comprises a back plane, a movable form, an eccentric disk, and molded slices of the earth, the sun, and the stars. The utility model is characterized in that the molded slice of the earth rotates an orbit of the earth through the sliding of the thread rope; the stars move in the meantime, which continuously twice cross the prime meridian through a point of the molded slice of the earth; The time intervals of the sidereal day and the solar day can be precisely marked. The utility model can vividly reflect the relationships among the earth, the stars, and the sun by using the teaching tool, and the advantages of the utility model are visual and specific.

Description

Teaching model of sidereal day and solar day

The utility model belongs to the teaching demonstration apparatus, is specially adapted to geographical teaching.

Present domestic geographical teaching mostly is the classroom and directly tells about, no teaching aid demonstration, about nature celestial body sidereal day and solar day, calculating such as earth rotation, revolution is arranged and is combined complexity, does not have the teaching aid analog demenstration, lacks perceptual knowledge and celestial body notion, this content is one of geographical teaching difficult point, do not have the teaching of this type of teaching aid, its shortcoming is dull in content tasteless, theory loses contact with reality, abstract, have a strong impact on results of learning.

The purpose of this utility model provides a kind of teaching aid model about sidereal day and solar day, directly demonstrates between universe the relation between the sun, fixed star and the earth.

Scheme of the present utility model, mainly by base plate, collapsible form, the deflecting plate and the sun, the earth, the fixed star matrix is formed, the collapsible form on base plate moves by but the stretching left and right sides of handle is parallel, earth matrix is being fixed by the bottom of deflecting plate, slip by cotton rope is made rotation and revolution motion around the sun, earth matrix is by the slip of cotton rope, around the Earth's orbit rotation, also revolution simultaneously, the same meridian of double process is also just in time facing to the sun, add that the same fixed star on the collapsible form also moves right simultaneously, marks the time interval of solar day and sidereal day exactly.

Advantage of the present utility model: understand the relation between solar day and sidereal day intuitively, specifically, easily.

The accompanying drawings embodiment:

Accompanying drawing be the sidereal day and solar day teaching aid structure of models schematic diagram.

This teaching aid model is made of base plate (1), collapsible form (2), deflecting plate (3) and the earth (4), the sun (6) fixed star (5) matrix, because the collapsible form handle is pulled out to the right, make earth matrix on the deflecting plate be subjected to the slip of cotton rope, on the Earth's orbit that arrow is represented, roll to the right, be that earth rotation revolves round the sun around day simultaneously, deflecting plate is also along with the rotating shaft of the earth below sun matrix rotated together, sidereal day (7), solar day (8) two dotted line positions aim at sun matrix simultaneously, be time interval on sidereal day, solar day with the origin-location.

The advantage of present embodiment: simple in structure, easy to use, directly perceived, concrete, make the people very clear.

Claims

1, a kind of sidereal day and solar day the teaching aid model, of the present utility model be characterised in that it be by:

1) base plate (1);

2) but an end has the collapsible form (2) of handle move left and right in the middle of two base plates;

3) supporting the ball template (4) that lands, serves as the deflecting plate (3) of axle by the ground ball template (4) of cotton rope hinge joint rotation with sun point;

4) at collapsible form (2) but go up the fixed star (5) and sun matrix (6) of move left and right; Form.

2, by described sidereal day of claim 1 and teaching aid model on solar day, it is characterized in that earth matrix (4) by cotton rope hinge joint rotation, rotates a sidereal day or solar day on revolution orbit, on the earth certain any still contrast sun matrix (6).

3, by described sidereal day of claim 1 and teaching aid model on solar day, it is characterized in that the deflecting plate (3) of ground ball template mobile on base plate (1) be with over glaze connection under the sun (6) matrix.