CN100590680C

CN100590680C - Sunshine earth phenomenon instrument

Info

Publication number: CN100590680C
Application number: CN200610049618A
Authority: CN
Inventors: 钱嘉禾
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-02-27
Filing date: 2006-02-27
Publication date: 2010-02-17
Anticipated expiration: 2026-02-27
Also published as: CN1815525A

Abstract

Earth phenomena instrument in use for demo of running variability when sunlight shine earth includes following parts: globe cover composed of two pieces of hemipheric cover including sunlight cover and night cover; sphere inside the cover for denoting earth; and meridian outside the cover; bearer for supporting above said parts. The globe cover is sedentary. Rotable earth axis is in south and north direction of the sphere. The meridian can be rotated back and forth angles around the globe cover. In time of demo, rotating the sphere and meridian can display day and night, calculate time difference, change of the four seasons and condition of air temperature in each place based on change of perpendicular incidence point on earth shined from sun. Features are: simple structure, easy of fabrication, reflecting natural phenomenon between sun and earth.

Description

Sunshine earth phenomenon instrument

Technical field

The present invention relates to educate the demonstration equipment technical field, especially relate to a kind of daylight that reflects and impinge upon the terrestrial globe of the spontaneous phenomenon that produces on the earth.

Background technology

In education,, demonstration daylight changes for impinging upon tellurian operation, China patent of invention CN2253506Y once disclosed a kind of " demonstrating terrestrial globe synchronously ", it is on the basis of former terrestrial globe, increase is by the power-jdriven gear of clock wheel module control, through reducing gear and clutch coupling globe and have the rotation of the simulated solar plate of light source drivingly respectively; Change though this device can reproduce the sunshine of the earth more intuitively, its mechanism is very complicated, and parts are many, make difficulty, and operation is also inconvenient.

Summary of the invention

The objective of the invention is in order to overcome the deficiency of prior art, provide a kind of structure and action all very simple, can be reflected in the sunshine earth phenomenon instrument that daylight in the motion of celestial body impinges upon the spontaneous phenomenon that produces on the earth again visually.

For achieving the above object, mentality of designing of the present invention is such: the sunlight " have shadow invisible ", change " tangible sunlight " into, and be called the sunlight cover, it is the semisphere case, substitutes sunshine; Equally, changing " tangible night " into the night invisible, be called the cover at night, also is the semisphere case; Two hemisphere covers are pieced together the general name ball cover; In the ball cover spheroid of the expression earth, just as former terrestrial globe, both concentric fits, ball cover maintains static, and spheroid can rotate flexibly, but axle center difference separately, the spheroid axle center of the expression earth is the north-south, and the ball cover axle center is and spheroid axle center vertical direction; A sheathed meridian circle outside ball cover; For convenient manually demonstration earth rotation, at the place, spheroid axle center of the expression earth earth's axis is set, the earth's axis to be passed through the chute that is provided with on the ball cover stretch out outside the ball cover, insert in the meridian center pit lower end, and the meridian circle central hole is passed in the upper end, exceeds the meridian circle top; In order to demonstrate revolution, a tooth bar is fixed in the meridian circle outer, is rotated by the gear driven meridian circle that matches with this tooth bar, also drives the earth's axis simultaneously and tilts to move along the chute on the ball cover.

During demonstration, rotating sphere and meridian circle, due to a certain position, the point of vertical change in location that impinges upon the earth according to the sun can show daytime and night and length variation round the clock, calculate the temperature condition of all parts of the world time difference, the variation of four seasons spring, summer, autumn and winter and various places etc.

Owing to adopted technique scheme, a kind of sunshine earth phenomenon instrument of the present invention, simple in structure, the principle novelty, easy to make, action has only spheroid " body of walking around ", " shaking " two actions of the expression earth, can be reflected in the spontaneous phenomenon that daylight in the motion of celestial body impinges upon on the earth to be produced visually, make the student become concrete perceptual knowledge from abstract concept, reach the effect of grasping knowledge quickly earth movements.

Description of drawings

Below in conjunction with drawings and Examples the present invention is described in detail.

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the structural representation of parts 3 spheroids of the present invention.

Fig. 3 is the structural representation of parts 2 ball covers of the present invention.

Fig. 4 is the vertical view of Fig. 3.

Fig. 5 is the schematic perspective view of parts 7 bearings of the present invention.

Among the figure: 1, the earth's axis, 2, ball cover, 3, spheroid, 4, meridian circle, 5, tooth bar, 6, gear, 7, bearing, 8, the sunlight cover, 9, night cover, 10, chute, 11, a dish, 12, support, 13, knob, 14, screw, 15, base.

Embodiment

Shown in accompanying drawing 1-4, a kind of sunshine earth phenomenon instrument of the present invention, comprise the spheroid 3 of representing the earth, the ball cover 2 at expression sunshine and night, meridian circle 4, and the rack-pinion 5 that meridian circle is rotated, 6 and bearing 7, said ball cover is by water white semisphere case, it is the semisphere case of sunlight cover 8 and colored transparent, be to cover 9 night to form, ball cover maintains static in this instrument, be painted with pattern on the ball cover, expression ecliptic line, the time difference, subsolar point, the altitude of the sun circle, noon-mark, two ends, ball cover north and south respectively have long strip sliding groove 10, the length of this chute is according to earth 's orbit cycle back and forth, and promptly caused subsolar point more than 365 days moves that the scope of variation determines; A sheathed meridian circle 4 outside ball cover, said tooth bar 5 is fixed in outside the meridian circle 4, by the gear drive that matches with it; Said spheroid 3 places in the ball cover 2, its North and South direction is provided with central shaft, be the earth's axis 1, the earth's axis is upwards passed through the chute 10 that is provided with on the ball cover and is stretched out outside the ball cover, and passes the central hole of meridian circle upper end, exceed meridian circle top 3-5cm, so that handling knob during rotary axis of earth, the earth's axis is inserted downwards in the center pit of meridian circle lower end, and spheroid can be rotated in ball cover, spherome surface is painted with map, and is identical with globe surface; Said apparatus is mixed bearing, and gear shaft and bearing are hinged, instrument can use;

Shown in accompanying drawing 5, be a kind of support style of the present invention, it comprises dish 11, be fixed in a dish down support 12 and support under by the fixing base 15 of screw 14, wherein prop up and coil 11 and be used to shelve ball cover 2; Said support 12 has the plate of two settings, and meridian circle 4 can be passed in the space that forms between two plates, and the tooth bar 5 of meridian circle external fixation and the gear 6 that matches with tooth bar place in this space, gear shaft is articulated on two plates, one end stretches out outside the plate, connects knob 13, so that rotate meridian circle.

Use sunshine earth phenomenon instrument of the present invention,,, can demonstrate the variation at daytime and night by the relation of subsolar point and warp according to earth rotation; By the relation of subsolar point and parallel, can calculate the time difference of all parts of the world; In conjunction with revolution of earth, revolution orbit be 23.5 ° of north latitude between 23.5 ° in the south latitude, by the relation of subsolar point and parallel, release four seasons spring, summer, autumn and winter variation distance; Change according to the latitude of subsolar point from the equator distance, demonstrating round the clock, length changes and temperature Change.

Implement the present invention, be not limited to such scheme, as not establishing rack-pinion, handle is pulled or directly pull good and establish; Simultaneously bearing also can be in many ways, as long as meet above-mentioned principle at once.

Claims

1, a kind of sunshine earth phenomenon instrument, it is characterized in that: have one at least by covering (9) two ball covers that the semisphere case is formed (2) at sunlight cover (8) and night, place the spheroid (3) of the expression earth in the ball cover (2), and be sheathed on the outer meridian circle (4) of ball cover (2);

Said ball cover is painted with pattern on (2), expression ecliptic line, the time difference, subsolar point, altitude of the sun circle, noon-mark; Two ends, ball cover north and south respectively have long strip sliding groove (10), and the length of this chute is according to earth 's orbit cycle back and forth, and promptly caused subsolar point more than 365 days moves that the scope of variation determines;

Said meridian circle (4), there is a central hole upper end, and there is a center pit lower end;

The North and South direction of said spheroid (3) is provided with central shaft, i.e. the earth's axis (1), and the earth's axis is upwards passed through the chute (10) that is provided with on the ball cover and is stretched out outside the ball cover, and passes the central hole of meridian circle (4) upper end, and the earth's axis is inserted downwards in the center pit of meridian circle lower end; Spheroid (3) surface is painted with map, and is identical with globe surface;

Be furnished with bearing (7) in addition, said apparatus is assembled on the bearing.

2, a kind of sunshine earth phenomenon instrument according to claim 1 is characterized in that: the said earth's axis is passed the central hole of meridian circle upper end, exceeds the meridian circle top and is 3-5cm.

3, a kind of sunshine earth phenomenon instrument according to claim 1 is characterized in that: the outer actuating device that also is connected with of said meridian circle (4).

4, a kind of sunshine earth phenomenon instrument according to claim 3 is characterized in that: the outer actuating device of said meridian circle (4) is rack-pinion (5,6).

5, a kind of sunshine earth phenomenon instrument according to claim 1, it is characterized in that: said bearing (7) comprises dish (11), be fixed in a dish down support (12) and support under the base (15) fixed by screw (14), wherein prop up and shelve ball cover (2) on the dish (11); Said support (12) has the plate of two settings, and meridian circle (4) can be passed in the space that forms between two plates.