JPH0624855Y2 - Earth revolution explanation device - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is to move the earth while tilting the earth axis in a certain direction with respect to the orbiting surface when the earth revolves around the sun by 66.6 degrees. The present invention relates to an earth orbiter that can explain the change in the length of day and night depending on the changes of the four seasons.

(Prior art) Conventionally, in order to explain the changes in the four seasons and the changes in the length of day and night due to the revolution of the earth, we used a globe ball sold by a science teaching material company, or a globe held by a hand I was moving around. In addition, most of the explanations were made using textbooks and other books.

(Problems to be solved by the invention) These have the following drawbacks.

(B) When using a trisphere, it cannot be easily made because it uses a large number of gears, and if the globe is revolved by hand, the globe moves with a certain inclination. . The price is 60,000-70,000 yen, so each school is at most one, and it is impossible to purchase the number of groups. The gears are exposed, and it's too mechanical and design-friendly for students.

(B) A model experiment with a globe. This is because the teacher or the student holds it by hand and moves it while orbiting the globe while keeping the inclination of the globe in a certain direction, which gives an artificial feeling and does not lead to a straightforward understanding. In addition, a teacher who understands the revolution must do it, and it is not possible for the students who are going to learn about the phenomena caused by the revolution to perform a group experiment.

(C) Textbooks and other books. Since this is originally a projection of a three-dimensional spatial phenomenon on a two-dimensional plane, some parts cannot be shown in the figure. Even if that is not the case, it is difficult for students who are weak in grasping solids.

The present invention has been made to eliminate these drawbacks.

(Means for Solving the Problem) A light bulb (ball ball) representing the sun model is screwed into the cylindrical socket in the base of the desk lamp through the hole formed in the center of the disk of the veneer representing the orbiting surface. An elongated plate having a hole that rotatably fits a cylindrical socket shaft having the same diameter as the film case at the end and a cylindrical fixed shaft slightly smaller than the socket shaft at the other end is provided, and the hole at the end of the plate is provided. Is fitted to the socket shaft. A shaft having an angle of approximately 66.6 with the revolution surface is provided on the upper bottom of a film case rotatably covered by a cylindrical fixed shaft, and an earth model (styrofoam ball) is supported on the shaft. The socket shaft and the film case are connected in the shape of a wide rubber band belt for office use. The present invention is an earth revolution orbiter having the above-mentioned configuration.

(Function) Since the socket shaft and the film case are connected by the wide rubber band for office work having a large friction, when the rotating plate is rotated by hand, the socket does not rotate but the film case rotates. For example, when the rotating plate member is rotated 90 degrees to the left, the rubber band is wound around the right side surface of the socket shaft, and the film case is pulled clockwise to rotate. The Earth model fixed to the upper bottom of the film case also rotates to the right along with it. Since the socket shaft and the film case have the same radius, the rotation angle of the film case is 90 degrees. If you rotate the plate for rotation 180 degrees, the film case also rotates 180 degrees, and the earth model (Styrofoam sphere)
Rotates around the sun model (ball sphere) without changing its inclination.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

(B) The socket shaft (2) of the desk lamp base (1) is formed into a cylindrical shape, and the upper portion of the socket shaft (2) is formed into a socket portion. A ball model (spherical bulb) is attached to the socket to form a sun model (18).

(B) Inclining the hole body (4) of the plate body that rotatably fits the socket shaft (2) into the rotating plate body (3) and the earth model (styrofoam sphere) (6) by 66.6 degrees A fixed shaft (5) which is rotatably fitted to the fixed film case (7) is provided. The diameter of the socket shaft (2) is the same as the outer diameter of the film case (7).

(C) The hole body (4) of the plate body is fitted to the socket shaft (2), one end of the wide office rubber band (8) is attached to the socket shaft (2), and the other end is attached to the film case (7). Link.

(D) When the disk (9) representing the revolving surface is attached and used, the ring (10) is fixed to the socket shaft (2) and the hole body (12) at the center of the disk is attached to the socket shaft (2). ) To support the disc (9), and the connecting rod (11) fixes the disc (9) and the rotating plate body (3).

Since this proposal has the structure as described above, when using this, the rotating model (3) is rotated by hand in the direction of the earth's revolution (counterclockwise), and the earth model (6) moves the earth axis. Rotate around the sun model (18) while tilting 66.6 degrees in a certain direction on the revolution surface.

Furthermore, insert the plastic earth model cover (14) attached to the support rod (16) through the spring body (15) into the hole body (17) on the disc (9) to cover the half surface of the earth model (6). You can check the difference in length of day and night depending on the season. The night is covered by the earth model cover. However, the cover (14) is not always attached, but it is used when the earth model (6) comes to the position of the winter solstice, the summer solstice or the spring equinox and autumn equinox.

On the Styrofoam sphere of the Earth Model (6), write the equator and the latitude line of the north latitude and indicate the position of Japan.

The axis of the earth axis is inserted in the earth model (6) so that the earth model (6) can rotate around the earth axis.

(Effect of the Invention) The present invention simply connects the fixed socket shaft (2) and the film case (7) with a wide-rubber office-use rubber band having a large friction, without using any complicated mechanical parts such as gears. , It is an experimental device that makes it possible to explain in an easy-to-understand manner by realizing a movement similar to the revolution of the earth. It can be made inexpensive and group experiments are possible. In addition, various experiments such as the reason for day and night, the orbit of the earth and the inclination of the earth's axis, the change of the four seasons, the change of the day and night length, and the change of the altitude of the sun can be conducted.

[Brief description of drawings]

 Fig. 1 is a front view of the present invention. Fig. 2 is an exploded perspective view of the present invention. Fig. 3 is an assembled perspective view of the present invention. Fig. 4 is a perspective view showing a cover of the earth model. (1) is a desk lamp base ( 2) is a socket shaft (3) is a plate for rotation (4) is a hole in the plate (5) is a fixed shaft (6) is an earth model (7) is a film case (8) is a wide rubber band for office work ( 9) is a disk (10) is an annulus (11) is a connecting rod (12) is a hole in the center of the disk (13) is a hole (14) is the earth model cover (15) is a spring (16) Is a support rod (17) is a hole (18) is a sun model (19) is the earth revolution explanation device body

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. An earth revolution orbiter comprising a sun model located at the center of a disk representing the revolution surface and an earth model installed on the periphery of the revolution surface, through a hole formed in the center of the disk representing the revolution surface. Cylindrical socket on the base of an electric stand An electric ball sphere representing a sun model screwed into the socket inside the shaft, a cylindrical socket shaft with the same diameter as the film case at the end, a hole body that rotatably fits, and a socket shaft at the other end An elongated plate having a slightly smaller diameter cylindrical fixed shaft, and an orbiting surface provided on the upper bottom of the film case rotatably covered by the fixed shaft and approximately 66.
An earth revolution orbiter characterized by comprising an earth model (styrofoam sphere) axially supported by a shaft having an inclination angle of 6 degrees, and a wide office-use rubber band which stretches a socket shaft and a film case.