CN2248902Y

CN2248902Y - Instrument for demonstration the movement of point of vertical sun-rays projecting

Info

Publication number: CN2248902Y
Application number: CN 95223092
Authority: CN
Inventors: 王敬芳
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-10-18
Filing date: 1995-10-18
Publication date: 1997-03-05
Anticipated expiration: 2005-10-18

Abstract

The utility model relates to an instrument for demonstrating the moving rule of the vertically projecting points of sun-rays on the surface of earth, belonging to the field of geography teaching aids, and comprising a lamp source, a rotary plate and a globe. The lamp source is provided with a revolution track panel for light transmission. The rotary plate is provided with an earth rotation gear set and an earth axial direction gear set, and the rotary plate not only mutually acts with a gearwheel of the tail end of an earth axis of the globe, but also matches with a backup hemisphere cover. Thus, the utility model forms the natural phenomena of earth revolution with 365 rounds of rotation, phenomena of polar day and polar night, length variation of day and night, direct solar radiation, oblique solar radiation, etc. The utility model provides an ideal teaching aid for teaching geography in current middle schools.

Description

Subsolar point is the movement law demonstrator at the earth's surface

The utility model relates to a kind of teaching aid field, particularly a kind of geography teaching in middle school apparatus.

At present, in the practice of geography teaching in middle school classroom, for subsolar point movement law at the earth's surface, the difference of sun direct projection and oblique fire, polar day phenomenon at polar night, rotation, revolution and the variation of length round the clock for the earth, these phenomenons of teacher's verbal explanation, the student understands not thorough, and the teacher adopts the analog demenstration of teaching aids such as some terrestrial globes, lamp, lack accuracy, do not reach desirable effect.

The utility model is exactly the needs for present geography teaching in middle school, and a kind of subsolar point of proposition is the movement law demonstrator at the earth's surface, can observe the direct projection and the oblique fire of the sun, the rotation of the polar day phenomenon at polar night and the earth, revolution and the variation of length round the clock.

The utility model is to realize like this, comprise that lamp is located in the lampshade, lampshade is installed on the lamp socket by support, the revolution orbit panel is two up and down, and be installed on the lampshade, also comprise a rotor plate, rotor plate is made up of upper plate and lower plate, said support passes this rotor plate one end, form control earth's axis direction gear by 5 identical gears of the number of teeth, be installed in the lower plate bottom surface, each gear two two-phase is dived, there is the gear of an end to pass support and is fixed on the lower plate, terminal gear is provided with thin axle, the different gear of 7 numbers of teeth is arranged and from the direction the 2nd of lamp, the 5th, the 6th gear is that in-line gears composition control earth rotation gear set is installed in the middle of the rotor plate, each gear two two-phase is dived, there is the gear of an end to pass support and is fixed on the upper plate, wherein the 6th in-line gears cog and terminal gear is installed in upper plate top, terminal gear is provided with thick axle, and said thin axle passes said thick axle, and the rotor plate end is provided with handle, thin axle upper end is provided with a gear, and latent mutually with the gear of being located at terrestrial globe ground shaft end, be provided with strut between the earth's axis and the thin axle, the utility model also has half ball cover standby.

Advantage of the present utility model:

1, owing to adopts revolution orbit face printing opacity technology, the light fasciculation directive earth, clear becoming clear.

2, the gear set outfit is simple, accurate, guarantees one all 365 weeks of rotation of revolution of earth accurately and reliably, reaches directly perceived, lively teaching purpose.

3, the utility model cost is low, and function is many, possesses practical value.

Below in conjunction with accompanying drawing the utility model is elaborated.

Fig. 1 is the utility model structural representation;

Fig. 2 is control earth rotation gear set synoptic diagram;

Fig. 3 is control earth's axis steering gear wheels synoptic diagram;

Fig. 4 is a hemisphere cover synoptic diagram.

Lamp (1) is located in the lampshade, lampshade (2) also is installed on the lamp socket (4) by support (3), revolution orbit panel (5) is two up and down, and be installed on the lampshade (3), also comprise a rotor plate (6), rotor plate (6) is made up of upper plate (7) and lower plate (8), said support (3) passes this rotor plate (6) one ends, by 5 numbers of gears is that 60 gear is formed control earth's axis steering gear wheels (9), be installed in lower plate (8) bottom surface, each gear two two-phase is dived, pass support (3) and be fixed on the lower plate (8) from direction the 1st gear of lamp, the 5th gear is provided with thin axle (10), there are 7 its numbers of teeth to be respectively the 1st gear 80, the 2nd coaxial wheels 20 (60), the 3rd gear 30, the 4th gear 30, the 5th in-line gears 20 (60), the 6th in-line gears 30 (73), the gear of the 7th gear 24 is formed control earth rotation gear set (11), be installed in upper plate (7), between the lower plate (8), each gear two two-phase is dived, wherein the 6th in-line gears cog and the 7th gear is installed on the upper plate (7), the 7th gear is provided with thick axle (12), said thin axle (10) passes said thick axle (12), rotor plate (6) end is provided with handle (13), it is 45 gear that thin axle (10) upper end is provided with the number of teeth, and the number of teeth terminal with being located at the terrestrial globe earth's axis (14) is that 9 gear is dived mutually, also be provided with strut (15) between the earth's axis (14) and the thin axle (10), hemisphere cover (16) is standby.

Claims

1, a kind of subsolar point is the movement law demonstrator at the earth's surface, it is characterized in that, lamp is located in the lampshade, lampshade is installed on the lamp socket by support, the revolution orbit panel is last, following two, and be contained on the lampshade, also comprise a rotor plate, rotor plate is by upper plate, lower plate is formed, said support passes this rotor plate one end, form control earth's axis steering gear wheels by 5 identical gears of the number of teeth and be installed in the lower plate bottom surface, each gear two two-phase is dived, there is the gear of an end to pass support and is fixed on the lower plate, the gear of the other end is provided with thin axle, the direction 2nd of the different gear of 7 numbers of teeth from lamp arranged, the 5th, the 6th gear is that in-line gears composition control earth rotation gear set is installed in the middle of the rotor plate and two two-phases are dived, there is the gear of an end to pass support and is fixed on the upper plate, wherein the 6th in-line gears cogs, terminal gear is installed in upper plate top, terminal gear is provided with thick axle, said thin axle passes illustrated thick axle, the rotor plate end is provided with handle, the upper end of thin axle is provided with gear, and dives mutually with the gear of being located at the terrestrial globe end, is provided with strut between the earth's axis and the thin axle.