CN2141584Y

CN2141584Y - The globe movement demonstration device

Info

Publication number: CN2141584Y
Application number: CN 92214177
Authority: CN
Inventors: 陈大伟
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-02-22
Filing date: 1992-02-22
Publication date: 1993-09-01
Anticipated expiration: 2002-02-22

Abstract

The utility model discloses a demonstration instrument of earth movements, which is composed of a base, a bracket, an earth axis, a globe, a solar ray plate, and a night semiglobe hood. The demonstration instrument of earth movements is characterized in that the globe is jabbed with a 0 DEG parallel, and a 0 DEG meridian and a 180 DEG meridian between a 23 DEG 26'n parallel and a 23 DEG 26's parallel. A rotary axis which can rotate around the earth axis is connected with the earth axis, and both ends of the rotary axis are respectively connected with the solar ray plate and the night semiglobe hood. The utility model can intuitively demonstrate part geographical meanings generated by earth rotation and revolution. The utility model has the advantages of simple structure and convenient manufacture, use, and operation.

Description

The globe movement demonstration device

The utility model relates to a kind of movable terrestrial globe.

The geographic significance that earth rotation and revolution produce always is the emphasis and the difficult point of geographical teaching, owing to lack audiovisual aids, the difficult religion of teacher, the student finds it difficult to learn.Chinese patent literature CN87103489 and CN2031145 all disclose a kind of earth movements teaching appliance, and they include terrestrial globe, midnight ball cover, sunlight board, and the position of sunlight board generally is and shaft coupling seat crossbeam relative fixed.Though these disclosed technology have its characteristics, demonstrate trouble, intuitively also poor.

The purpose of this utility model provides a kind of energy ocular demonstration earth rotation easy to use and the movable terrestrial globe of the part geographic significance of revolution generation.

The purpose of this utility model realizes by following solution: have pedestal, support, the earth's axis and the terrestrial globe that rotates with the earth's axis, and sunray plate, midnight ball cover movable terrestrial globe in, in 0 ° and 180 ° of warps stabbing on the terrestrial globe between empty 0 ° of latitude and 23 ° 26 ' N to the 23 ° 26 ' S parallel, connect its two ends again at earth's axis middle part and be from terrestrial globe and cut that stretch out in the vacancy and can rotate and the turning axle doing to swing up and down form around the earth's axis, described sunray plate and midnight ball cover be connected to the two ends of turning axle respectively.During use, hold turning axle, make earth rotation, turning axle (0 ° of latitude is cut the sky part) under the line rotates, drive sunray plate and night hemisphere cover on the terrestrial globe and move, and can demonstrate various places day and night change and different longitude local time difference phenomenons so intuitively; Turning axle is moved between 23 ° 26 ' N to 23 ° 26 ' S, but just move in the north and south of ocular demonstration subsolar point, and can demonstrate the multiple geographic significance that produces by the phenomenon of the solar light irradiation earth thus.

Above-mentioned midnight ball cover two ends up and down the part that contacts with the earth's axis respectively have a degree be 23 ° 26 ' narrow slit so that midnight ball cover more can with turning axle north and south move 23 ° 26 '.

Also stab 23 ° of 26 ' N and the 23 ° of 26 ' S parallels have in vain between 0 ° of warp to 30 ° E warp on the above-mentioned terrestrial globe, 23 ° of 26 ' N and 23 ° of 26 ' S parallels between 180 ° to 150 ° W warps.Thus, turning axle two outer ends can place or move in cutting on empty 23 ° of 26N and the 23 ° of 26 ' S parallels, even subsolar point suspends on the tropic, can demonstrate in the polar circle phenomenons such as polar day polar night so more significantly.

The middle part of the above-mentioned earth's axis is spherical, above-mentioned turning axle middle part is the spheroidite that can coat earth's axis middle part spheroid of hollow, the hollow spheres physical efficiency at turning axle middle part is rotated relative to sliding around the earth's axis, and promptly turning axle rotates around the earth's axis, and can swing up and down 23 ° 26 '.

The utlity model has the good advantage of degree easy to use, directly perceived, can demonstrate the multiple geographic significance that earth rotation and revolution produce: in presentation process, can give full play to student's initiative and enthusiasm, also be beneficial to the exploitation of students intelligence.The utility model structure characteristics simple, easy to make of also signing an undertaking; The middle school teaching material because it links closely is convenient to explaining operation, so wide adaptability again.

Further specify the utility model below in conjunction with drawings and Examples.

Fig. 1 is the utility model structural representation.

Fig. 2 is turning axle and earth's axis connection layout.

The utility model (see figure 1) has on pedestal 1, the pedestal seat and is connected with support 2, is connected with the earth's axis 3 on the support 2, be connected with terrestrial globe 4 on the earth's axis 3, the terrestrial globe Northern Hemisphere is fixed on the arctic of the earth's axis 3, and the Southern Hemisphere is fixed on the South Pole, and terrestrial globe 4 is thus with the earth's axis 3 rotations; Stab on the terrestrial globe 4 and have in vain: (1) 0 ° of parallel, 0 ° and 180 warps between (2) 23 ° 26 ' N to 23 ° 26 ' S parallel, 23 ° of 26 ' N and 23 ° of 26 ' S parallels between 23 ° of 26 ' N and 23 ° of 26 ' S parallels between (3) 0 ° of warp to 30 ° E warps, 180 ° to 150 ° W warps; Be connected with turning axle 5 at the earth's axis 3 middle parts, the earth's axis 3 middle parts are that spherical 6(sees Fig. 2), turning axle 5 middle parts correspondingly are the spheroidite 7 that can coat sphere 6 of hollow, turning axle 5 can rotate also around the earth's axis 3 can swing up and down certain angle (＞23 ° 26 '); Stretch out from the vacancy of cutting on the terrestrial globe 4 at the two ends of turning axle 5, and be connected to respectively sunray plate 8 and midnight ball cover 9, sunray plate 8 usefulness internal diameters are slightly larger than the white plastic plate of terrestrial globe 4 radiuses and make, go up " sunray " and parallel arrow with red the notes on the plate, and annotate and go up 90-50 ° solar noon sun height (it directly discloses solar noon sun height profile characteristics and is promptly successively decreased to the both sides, north and south by the direct projection parallel), there is a jack base 10 at sunray plate 8 middle parts, relative fixed in the hole of turning axle 5 outer end patchhole seats 10; Midnight, ball cover 9 usefulness radiuses were slightly larger than the dark brown transparent plastic making of semisphere of terrestrial globe 4 radiuses, the middle part is also made a jack base 11 and is joined with another outer end of turning axle, midnight ball cover about in the of 9 two ends near the part that contacts with the earth's axis, respectively cut an empty flute profile narrow slit 12(subtended angle be 23 ° 26 ') so that midnight ball cover can with turning axle north and south move 23 ° 26 ', cover the west midnight and annotate with black and go up " dusk line ", annotate with white and go up " line in morning " two words in the east; On terrestrial globe 4, annotate in equator and place, 0 ° of warp intersection point west side and to go up " March 21 (Spring Equinox) ", annotate and go up " September 23 (Autumnal Equinox) " at the place, east side, go up " June 22 (Summer Solstice) ", annotate upward " Dec 22 (Winter Solstice) " printed words in 0 ° of warp and 23 ° of 26 ' N intersection point place notes, and indicate the subsolar point moving directions with four arrow lines in 0 ° of warp and 23 ° of 26 ' S intersection point places.

Main usage purposes of the present utility model is summarized as follows:

(1) holds turning axle 3, make earth rotation, at this moment the turning axle 3 empty part of cutting is under the line rotated, driving sunray plate 8 and night hemisphere covers on the terrestrial globe 4 mobile, the place of different longitudes on the terrestrial globe, pass through line in morning (sunrise), sun direct projection (high noon), confused line (sunset), night hemisphere center (midnight) successively, pass through the line in morning once more ... process, so just demonstrated the variation and the day and night change phenomenon of various places local time.

(2) hold turning axle 3, turning axle 3 is moved between 23 ° of 26 ' N-23 ° of 26 ' S, the demonstration subsolar point north and south move: March 21 subsolar point under the line, move northward later on, June 22 point of vertical at 23 ° of 26 ' N, later point of vertical south is moved, September 23 is the direct projection equator once more, south is moved later on, and 23 ° of 26 ' S of direct projection on Dec 22 move northward again later on.This moving, also can demonstrate the variation of various places solar noon sun height: during Dec 22 to 22, second on June, 23 ° of height of solar noon sun to the north of 26 ' N increase, and 23 ° of height of solar noon sun on the south 26 ' S reduce gradually, and June 22 to Dec 22, situation was opposite.Between 23 ° of 26 ' N and the 23 ° of 26 ' S then 90 °-43 ° 8 ', between change.

(3) March 21, September 23, sun direct projection equator, midnight, ball cover was vertically divided each parallel circle, the global equinox equally; March 21, midnight, ball cover south was moved to June 22, and at this moment each latitude night arc (night) of the Northern Hemisphere shortens gradually, and day arc (daytime) increases gradually, and the Southern Hemisphere situation is opposite; June 22, midnight, ball cover covered the Southern Hemisphere scope maximum, each latitude night arc the longest (night is the longest), and polar night appears in part on the south the Antarctic Circle, and Northern Hemisphere situation is then in contrast.Subsolar point south is moved later on, the result opposite with above-mentioned situation occur.So just demonstrated the various places variation of length round the clock.

(4) the astronomical implication in summer is meant that daytime is the longest, and a period of time of solar noon sun height maximum, winter is then opposite.Can draw by above-mentioned demonstration that be Northern Hemisphere summer one period before and after June 22, be Northern Hemisphere winter one period before and after Dec 22, between transition season be spring, autumn, the Southern Hemisphere phase-plate in season.Can make student's astronomical feature in the clearer understanding four seasons like this.

(5) moving up and down in the process along 0 ° of warp at turning axle 3, the student can be observed 23 ° 26 ' sun direct projection chance is arranged between N to 23 ° 26 ' S, it is many to obtain solar heat, is the torrid zone; 66 ° to the north of 34 ' N, 66 ° polar day phenomenon at polar night occurs on the south 34 ' S, and sun altitude is little, and it is few to obtain solar heat, is the frigid zone; Between the torrid zone and the frigid zone, both do not had the direct projection chance, electrodeless again main electrod night, heat is placed in the middle, is the temperate zone.So just having demonstrated the torrid zone has direct projection phenomenon, frigid zone that the astronomical feature of polar day phenomenon at polar night is arranged.

(6) the utility model do not adorn sunray plate 8 and midnight ball cover 9, can make common terrestrial globe and use.

Claims

1, a kind of movable terrestrial globe, terrestrial globe (4) that rotates by pedestal (1), support (2), the earth's axis (3) with the earth's axis and sunray plate (8), ball cover at midnight (9) constitute, and it is characterized in that described terrestrial globe (4) stabs 0 ° and 180 ° of warps between empty 0 ° of parallel, 23 ° 26 ' N to the 23 ° 26 ' S parallel; Be connected with its two ends at the earth's axis (3) middle part and can cut turning axle (5) that stretch out in the vacancy and that can rotate and do to swing up and down around the earth's axis from terrestrial globe, described sunray plate (8) and ball cover at midnight (9) are connected to the two ends of turning axle (5) respectively.

2, movable terrestrial globe according to claim 1, the two ends up and down that it is characterized in that described ball cover at midnight (9) the part that contacts with the earth's axis respectively have a subtended angle be 23 ° 26 ' narrow slit (12), midnight the ball cover west be marked with " dusk line ", be marked with " line in morning " printed words in the east.

3, movable terrestrial globe according to claim 1 is characterized in that also stabbing on the described terrestrial globe (4) 23 ° of 26 ' N and 23 ° of 26 ' S parallels between empty 0 ° of warp to 30 ° E warp, 23 ° of 26 ' N and 23 ° of 26 ' S parallels between 180 ° to 150 ° W warps.

4, movable terrestrial globe according to claim 1 is characterized in that the described earth's axis (3) middle part for spherical, described turning axle (5) middle part for hollow can coat earth's axis middle part spherical and can be relative to sliding the spheroidite that rotates.

5, movable terrestrial globe according to claim 1, it is characterized in that described terrestrial globe (4) upward is marked with " March 21 (Spring Equinox) " in equator and place, 0 ° of warp intersection point west side, the place, east side is marked with " September 23 (Autumnal Equinox) ", be marked with " June 22 (Summer Solstice) " in 0 ° of warp and 23 ° of 26 ' intersection point places, be marked with " Dec 22 (Winter Solstice) " printed words in 0 ° of warp and 23 ° of 26 ' S intersection point places, and indicate the arrow that indicates the subsolar point moving direction.