Multipurpose globe model, map projection device and projection learning method

Abstract

The invention discloses a multipurpose tellurion model, a map projection device and a projection learning method. The multipurpose tellurion model comprises a semicircular flat plate, an arched flat plate, a circular flat plate, a stabilizing plate and a spherical shell sleeve, a long groove and a short groove are formed in the edge of the circular flat plate and are arranged in the diameter direction of the circular flat plate, a long clamping groove and a short clamping groove are formed in the linear edge of the semicircular flat plate and are both perpendicular to the linear edge of the semicircular flat plate, the long clamping groove coincides with the circle center of the semicircular flat plate, and the short clamping groove coincides with the circle center of the semicircular flat plate. The number of the clamping short grooves is two, the two clamping short grooves are symmetrical about the center of the clamping long groove, the semicircular flat plate and the arched flat plate are clamped on the circular flat plate to form a sphere, the spherical shell sleeve covers the surface of the sphere, the spherical shell sleeve can achieve state conversion from a plane to a three-dimensional state and from the three-dimensional state to the plane state, and therefore corresponding knowledge can be mastered; the sphere can be converted from a plane component to a three-dimensional component and from the three-dimensional component to the plane component.

Description

Technical Field

[0001] The invention relates to the field of globes, and in particular to a multi-purpose globe model, a map projection device and a projection learning method. Background Art

[0002] There are many teaching difficulties in the teaching and learning of geography in middle schools, which require teaching aids and learning tools to help solve them. For example, longitude and latitude grids, map projections from spheres to planes, earth movement, distribution and causes of climate types, three-circle circulation, etc., are all difficult for middle school students to understand and difficult for teachers to teach.

[0003] Although there are many teaching aids and learning tools on the market, there are not many learning tools that can truly help students solve their mental pain points in learning, and allow students to focus and concentrate in the process of using their brains and hands, solve their pain points, generate happiness, and mobilize their internal motivation. Among them, learning tools for spheres, planes, and map projections are even less popular. Contents such as latitude and longitude grids and three-circle circulations are even more difficult to understand.

[0004] As for the knowledge point of transforming the three-dimensional spherical image on the globe into the two-dimensional image in the book, students need to use their imagination. On the one hand, it is easy for students to give up and lose interest. On the other hand, the globes on the market cannot help students to transform on the spherical surface, especially from three-dimensional to two-dimensional, from three-dimensional to two-dimensional. It is easy to confuse the knowledge points if you are not careful. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art in lacking teaching tools for training three-dimensional to two-dimensional thinking and lacking teaching tools for projection, and to provide a multi-purpose globe model, a map projection device and a projection learning method.

[0006] The technical solution adopted by the present invention to solve its technical problems is a multi-purpose globe model, a map projection device and a projection learning method, comprising a semicircular plate, an arcuate plate, a circular plate, a stabilizing plate and a spherical shell sleeve; the edge of the circular plate is provided with a long groove and a short groove, and the long groove and the short groove are arranged along the diameter direction of the circular plate, the straight edge of the semicircular plate is provided with a clamping long groove and a clamping short groove, and the clamping long groove and the clamping short groove are both perpendicular to the straight edge of the semicircular plate, the clamping long groove coincides with the center of the semicircular plate, the clamping short groove is provided with two, and the two clamping short grooves are symmetrical about the center of the clamping long groove;

[0007] The semicircular flat plate and the arcuate flat plate are both provided with a plurality of the long grooves and the short grooves are both provided with a plurality of the long grooves and are evenly distributed on the circular flat plate, one short groove is spaced between two long grooves, and one long groove is spaced between two short grooves, the number of the semicircular flat plate and the number of the long grooves correspond one to one, and the number of the arcuate flat plate and the number of the short grooves correspond one to one;

[0008] The long groove and the clamping long groove are engaged with each other, the arcuate flat plate is clamped in the short groove, two stabilizing plates are provided, and one above and one below are clamped in two of the clamping short grooves of the plurality of semicircular flat plates at the same time, when the arcuate flat plate is clamped on the short groove, the upper and lower ends of the arcuate flat plate abut against the stabilizing plate at the same time, the semicircular flat plate and the arcuate flat plate are clamped on the circular flat plate to form a sphere, and the spherical shell covers the surface of the sphere.

[0009] Furthermore, U-shaped grooves are arranged on the arc-shaped edges of the semicircular flat plate and the arc-shaped flat plate, and elastic ropes are sleeved on the U-shaped grooves.

[0010] Furthermore, the semicircular plates and the arcuate plates are each provided with 12 pieces, the U-shaped grooves have 9 pieces, the elastic rope loops are arranged in the U-shaped grooves corresponding to the Arctic Circle, 60° north latitude, 30° north latitude, Tropic of Cancer, Equator (0 degree latitude), Tropic of Capricorn, 30° south latitude, 60° south latitude, and Antarctic Circle in sequence, and the semicircular plates and the arcuate plates represent meridians.

[0011] Furthermore, the spherical shell includes a chart layer and a covering paper layer, the chart layer is pasted on the surface of the covering paper layer, the covering paper layer is a polygon, and the chart layer is a plane picture cut out of a hemisphere, and the plane picture includes a latitude and longitude grid picture, a globe picture, or a climate and ocean current picture.

[0012] Furthermore, when the chart layer is pasted on the covering paper layer, the covering paper layer has an uncovered blank area. The spherical shell is bent in one direction and the blank area is folded or concave in the bending direction. The spherical shell is transformed from a two-dimensional plane into a three-dimensional hemispherical shape and can be covered on a sphere.

[0013] Furthermore, it also includes a pole, a column and a bracket, the pole is vertical and passes through the circular flat plate and the stabilizing plate, the column has a through hole and is connected to both ends of the pole, and the column is located in the sphere, the bracket has a protrusion, and the sphere is detachably connected to the bracket through the through hole of the column.

[0014] The present invention further solves its technical problem by adopting a technical solution, which is a map projection device of a multi-purpose globe model, comprising a light-emitting body, a projection circuit and a projection piece, wherein the projection circuit comprises a power supply and a switch, and a mounting hole is provided at the center of the circular flat plate, and the light-emitting body is mounted on the mounting hole; the projection piece is a cone, a cylinder and a rectangular plane, and the cone, the cylinder and the rectangular plane plate are composed of transparent flexible materials and nylon buckles, the cone is formed by curling a plane sector and nylon buckles arranged on the side of the plane sector, and the cylinder is formed by curling a plane rectangle and nylon buckles arranged on the side of the plane sector.

[0015] Furthermore, it is characterized in that it also includes a support and an erasable pen, wherein a light-emitting body is installed in the support and the light-emitting body is connected to the projection circuit, and the erasable pen can draw on transparent flexible materials of cones, cylinders and rectangular flat plates.

[0016] The present invention further solves the technical problem by adopting a technical solution that is a projection learning method performed by a map projection device of a multi-purpose globe model, comprising the following steps:

[0017] S1. Assemble the semicircular flat plate, the arcuate flat plate, the circular flat plate, the stabilizing plate, the spherical shell and the luminous body, and connect the luminous body to the power supply of the projection circuit to form a luminous sphere;

[0018] S2, cover the projection piece on the luminous sphere, and use an erasable pen to draw patterns and lines on the sphere cover;

[0019] S3. Unfasten the nylon buckle and unfold the projection part.

[0020] Further, in step S2, when the projection part adopts a cone, when the luminous sphere emits light, the cone is put on the southern hemisphere or the northern hemisphere, and the students can use an erasable pen to draw the lines or ocean currents near the Tropic of Capricorn or the Tropic of Cancer on the globe on the cone cover, and then unfold the cone into a plane, and the lines near the Tropic of Capricorn or the Tropic of Cancer can be converted from a spherical map to a plane map; when the projection part adopts a cylinder, when the luminous sphere emits light, the cylinder is put on the equator (0 degrees latitude), and the students can use an erasable pen to The lines or ocean currents near the equator (0 degree latitude) of the globe are drawn on the cylinder. After drawing, the cylinder is unfolded into a plane, and the lines near the equator (0 degree latitude) can be converted from a spherical diagram to a plane diagram; when the projection part uses a rectangular plane plate, when the luminous sphere is luminous, the rectangular plane plate is put on the South Pole or the North Pole, and students can use an erasable pen to draw the lines or ocean currents near the South Pole or the North Pole of the globe on the rectangular plane plate. After drawing, the lines near the South Pole or the North Pole can be converted from a spherical diagram to a plane diagram.

[0021] In summary, the present invention has the following beneficial technical effects:

[0022] 1. The spherical shell can realize the transition from plane to three-dimensional and from three-dimensional to plane. At the same time, when students use the projection to draw and then unfold, they can clearly see the image of their own drawing and compare it with the unfolded spherical shell. Then they can clearly understand the shortcomings of the painting and master the corresponding knowledge.

[0023] 2. The sphere can be transformed from a flat component to a three-dimensional component, and from a three-dimensional component to a flat component. At the same time, it can be combined with a light source to project the sphere. Whether it is for teaching or comparing students, the drawings of the projected parts are more three-dimensional, and can also be transformed from three-dimensional to two-dimensional.

[0024] 3. Easy to obtain materials, low cost, simple to make, flexible to assemble and disassemble, easy to carry, intuitive and multi-purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of a semicircular flat plate of an embodiment of a multi-purpose globe model of the present invention;

[0026] Figure 2 It is a schematic diagram of an arcuate flat plate of an embodiment of a multi-purpose globe model of the present invention;

[0027] Figure 3 It is a schematic diagram of a circular flat plate of an embodiment of a multi-purpose globe model of the present invention;

[0028] Figure 4 It is a splicing schematic diagram of an embodiment of a multi-purpose globe model of the present invention;

[0029] Figure 5 is a schematic diagram of an embodiment of a multi-purpose globe model of the present invention being assembled to form a sphere;

[0030] Figure 6 It is a schematic diagram of a spherical shell of a multi-purpose globe model embodiment of the present invention being unfolded;

[0031] Figure 7 It is a schematic diagram of a multi-purpose globe model embodiment of the present invention, in which a spherical shell is retracted into a hemisphere and is sheathed on a spherical body;

[0032] Figure 8 It is a cone projection schematic diagram of an embodiment of a map projection device of a multi-purpose globe model of the present invention;

[0033] Fig. 9 It is a cylindrical projection schematic diagram of an embodiment of a map projection device of a multi-purpose globe model of the present invention;

[0034] Fig.10It is a schematic diagram of a rectangular plane plate projection of an embodiment of a map projection device of a multi-purpose globe model of the present invention;

[0035] Fig.11 The utility model is a physical picture of a multi-purpose globe model of the present invention.

[0036] Description of reference numerals:

[0037] 1. Semicircular plate; 101. Long snap-in groove; 102. Short snap-in groove; 2. Arched plate; 3. Circular plate; 301. Long groove; 302. Short groove; 4. Stabilizing plate; 5. Ball shell; 501. Chart layer; 502. Wrapping paper layer; 503. Blank area; 6. U-shaped groove; 7. Elastic rope; 8. Vertical pole; 9. Column; 10. Bracket; 11. Light-emitting body; 12. Projection circuit; 13. Projection element; 131. Transparent flexible material; 132. Nylon buckle; 14. Support. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0039] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 In this embodiment, a multi-purpose globe model includes a semicircular plate 1, an arcuate plate 2, a circular plate 3, a stabilizing plate 4, a spherical shell 5, a vertical rod 8, a vertical column 9 and a bracket 10, wherein the semicircular plate 1, the arcuate plate 2, the circular plate 3 and the stabilizing plate 4 are assembled into a sphere, the spherical shell 5 covers the sphere, and the vertical rod 8 and the vertical column 9 install the sphere on the bracket 10.

[0040] Reference Figure 3 and Figure 4 The circular plate 3 serves as the insertion base of the sphere, and its edge has a long groove 301 and a short groove 302 arranged along the diameter direction of the circular plate 3. The semicircular plate 1 is spliced ​​with the circular plate 3 through the long groove 301, and the arcuate plate 2 is spliced ​​with the circular plate 3 through the short groove 302; there are 12 long grooves 301 and 12 short grooves 302, and the long grooves 301 and the short grooves 302 are evenly distributed around the center of the circular plate 3; the long grooves 301 and the short grooves 302 are alternately arranged in sequence, that is, there is a short groove 302 in the middle of two adjacent long grooves 301, and there is a long groove 301 in the middle of two adjacent short grooves 302, and the angles between the long grooves 301 and the short grooves 302 are the same, so that the circular plate 3 is equally divided into 24 parts by the long grooves 301 and the short grooves 302, and the angle between the long grooves 301 and the short grooves 302 is 15°.

[0041] Reference Figure 1 , Figure 2 and Figure 4 The straight edge of the semicircular flat plate 1 has a long snap-in groove 101 and a short snap-in groove 102, and the long snap-in groove 101 and the short snap-in groove 102 are both perpendicular to the straight edge of the semicircular flat plate 1, wherein the long snap-in groove 101 coincides with the radius line of the semicircular flat plate 1 to divide the semicircular flat plate 1 equally, and the short snap-in groove 102 has two symmetrical ones, and the short snap-in groove 102 is symmetrical about the center of the long snap-in groove 101; the long snap-in groove 101 of the semicircular flat plate 1 and the long groove 301 of the circular flat plate 3 are engaged with each other to realize the assembly of the two, and the arcuate flat plate 2 is assembled by plugging the flat plate itself into the short groove 302 to realize the assembly of the two.

[0042] Reference Figure 4 , Figure 5 , the semicircular plate 1 and the arcuate plate 2 each have 12, and they are assembled one by one on the long groove 301 and the short groove 302, and then assembled into a sphere; and each semicircular plate 1 and the arcuate plate 2 have 9 U-shaped grooves 6 on the arcuate edge, and the 9 U-shaped grooves 6 are scattered on the arcuate edge, and respectively correspond to the Arctic Circle, 60° north latitude, 30° north latitude, Tropic of Cancer, Equator (0 degree latitude), Tropic of Capricorn, 30° south latitude, 60° south latitude, and Antarctic Circle. After assembly, taking the equator as an example, there are 24 U-shaped grooves 6 in total, and an elastic rope 7 is set on the 24 U-shaped grooves 6 to represent the equator (0 degree latitude), and the remaining 8 positions are also set with elastic ropes 7 to represent different latitudes. After assembly, the 12 semicircular plates 1 and the arcuate plates 2 represent the longitude of the earth. In addition, the elastic cord 7 has two colors. The elastic cords 7 representing the latitudes of 0 degrees, 30 degrees, and 60 degrees are of one color, and the elastic cords 7 representing the latitudes of 23 points 5 degrees and 66 points 5 degrees are of another color. In addition, the elastic cords 7 representing the latitudes of 23 points 5 degrees and 66 points 5 degrees are dotted to represent dotted lines.

[0043] Reference Figure 4 There are two stabilizing plates 4. When the 12 semicircular flat plates 1 are assembled on the circular flat plate 3, the stabilizing plates 4 are clamped on the clamping short groove 102, and one stabilizing plate 4 is clamped in the clamping short groove 102 of the 12 semicircular flat plates 1 in the upper part, and the other stabilizing plate 4 is clamped in the clamping short groove 102 in the lower part; the upper and lower ends of the inner side of the arched flat plate 2 have recessed parts, and the depth and width of the recess are the same as the clamping short groove 102, so that when the arched flat plate 2 is inserted into the circular flat plate 3, the recessed part can just abut against the stabilizing plate 4, thereby reducing the possibility of shaking of the arched flat plate 2 after assembly, and the elastic rope 7 not only represents the weft but also has the function of binding the semicircular flat plate 1 and the arched flat plate 2.

[0044] In this embodiment, the semicircular plate 1 is not actually a complete semicircle, but is approximately a semicircle, and its central angle is between 160° and 180°, and the arcuate plate 2 is also approximately arc-shaped, and the central angle of the arcuate plate 2 is the same as the central angle of the semicircular plate 1. In addition, the diameters of the semicircular plate 1, the arcuate plate 2 and the circular plate 3 are the same.

[0045] After the semicircular plate 1 and the arcuate plate 2 are assembled on the circular plate 3 to form a sphere, since the central angle of the semicircular plate 1 and the arcuate plate 2 is not 180°, the assembled sphere has a hollow part. The upright pole 8 and the column 9 are installed here. The upright pole 8 passes through the stabilizing plate 4 and the circular plate 3 at the same time. The column 9 has a through hole and can be detachably installed on the upright pole 8, and the column 9 just abuts against the stabilizing plate 4 so that the upright pole 9 closes the two ends of the sphere. The bracket 10 has a protrusion that matches the passage of the column 9, so that the sphere can be detachably connected to the bracket 10 and can be rotated. In addition, after the semicircular plate 1 and the arcuate plate 2 are assembled on the circular plate 3, hollow circular holes for placing the columns 9 are formed at the upper and lower ends. The diameter of the circular holes is slightly smaller than the diameter of the columns 9, so that when the columns 9 are placed in the hollow circular holes, the outer peripheral surface of the columns 9 will also abut against the semicircular plate 1 and the arcuate plate 2 and generate outward pressure, and the elastic rope 7 located in the U-shaped groove 6 will be slightly stretched to generate inward elastic force, thereby ensuring that the elastic rope 7 is stably located in the U-shaped groove 6 as much as possible. Under the action of the outward pressure and the inward elastic force, the stability of the sphere is also guaranteed, that is, the columns 9 also have the function of balancing the extrusion from the elastic rope 7, so that the elastic rope 7 located in the U-shaped groove 6 is in a stable state, and the sphere is also more stable.

[0046] Reference Figure 6 and Figure 7 The spherical shell 5 comprises a chart layer 501 and a wrapping paper layer 502. The chart layer 501 is pasted on the surface of the wrapping paper layer 502. The chart layer 501 is a plane picture cut from a hemispherical shape. The plane picture includes a latitude and longitude grid picture, a globe picture, or a climate and ocean current picture. The plane picture cut is an irregular figure. The wrapping paper layer 502 is similar to a polygon and is a 24-sided polygon. When the chart layer 501 is pasted on the wrapping paper layer 502, there is an uncovered blank area 503 on the wrapping paper layer 502. The spherical shell 5 is bent in one direction, and the blank area 503 is folded or concave in the bending direction. The spherical shell 5 is transformed from a two-dimensional plane into a three-dimensional hemispherical shape and can just cover the sphere. In addition, the wrapping paper layer 502 is aluminum foil or other materials with elastic shrinkage or elastic memory.

[0047] The map projection device of the multi-purpose globe model of the present invention comprises a light emitting body 11, a projection circuit 12, a projection piece 13, a support 14 and an erasable pen, wherein the light emitting body 11 is installed in the sphere or the support 14, the upper and lower edges of the opening of the clamping long groove 101 of the semicircular flat plate 1 each have a 1 / 4 circular opening, the center of the circular flat plate 3 has a mounting hole, and the 1 / 4 circular openings of the multiple semicircular flat plates 1 make space inside the sphere for installing the light emitting body 11, and the light emitting body 11 is electrically connected to the projection circuit 12. The projection piece 13 is composed of a transparent flexible material 131 and a nylon buckle 132, and has three specific shapes, namely a cone, a cylinder and a rectangular plane, wherein the cone is formed by curling a flat sector and a nylon buckle 132 arranged on the side of the flat sector, and the cylinder is formed by curling a flat rectangle and a nylon buckle 132 arranged on the side of the flat sector, and the erasable pen can repeatedly draw on the transparent flexible material 131. In addition, on the rectangular flat projection piece 13, the nylon buckle 132 is not necessarily present. Usually, the nylon buckle 132 is used only when it needs to be rolled up for easy storage.

[0048] The projection circuit 12 includes a power source, a switch and a wire. The power source is a 12-volt battery pack or a rechargeable battery pack. The switch includes but is not limited to an ordinary push-button switch, an electromagnetic relay, and a photoelectric switch. In addition, the light source 11 is an LED lamp and a handheld flashlight (not shown in the figure). The LED lamp is placed in the sphere or the support 14. The support 14 has a pit for placing the sphere. When the sphere is placed on the support 14, there is no tilt angle and it can be placed completely vertically, which is convenient for students to draw lines on cones, cylinders, and rectangular planes with a pen during projection. The handheld flashlight can be illuminated from any direction when the sphere is placed on the support 14. On the one hand, it is convenient for students to see the contents of the covering on the outer surface of the sphere. On the other hand, the handheld flashlight can be used to simulate the sun. The handheld flashlight is separated from the sphere by a distance to show the rotation of the earth, the revolution of the earth, orthographic projection, and spherical projection.

[0049] Reference Figure 8 , Fig. 9 and Fig.10 , the projection learning method of the present invention is:

[0050] S1, assemble the semicircular plate 1, the arcuate plate 2, the circular plate 3, the stabilizing plate 4, the spherical shell 5 and the luminous body 11, and connect the luminous body 11 to the power supply of the projection circuit 12 to form a luminous sphere;

[0051] S2, cover the projection element 13 on the luminous sphere, and use an erasable pen to draw the pattern and lines on the spherical shell 5; when the projection element 13 is a cone, when the luminous sphere is luminous, put the cone on the southern hemisphere or the northern hemisphere, and students can use an erasable pen to draw the lines or ocean currents near the Tropic of Capricorn or the Tropic of Cancer on the globe on the cone cover, and after drawing, unfold the cone into a plane, and can convert the lines near the Tropic of Capricorn or the Tropic of Cancer from a spherical map to a plane map; when the projection element 13 is a cylinder, when the luminous sphere is luminous, put the cylinder cover At the equator (0 degrees latitude), students can use an erasable pen to draw lines or ocean currents near the equator of the globe on the cylindrical sleeve. After drawing, the cylindrical sleeve is unfolded into a plane, and the lines near the equator can be converted from a spherical diagram to a plane diagram; when the projection member 13 uses a rectangular plane plate, when the luminous sphere is luminous, the rectangular plane plate is put on the South Pole or the North Pole, and students can use an erasable pen to draw lines or ocean currents near the South Pole or the North Pole of the globe on the rectangular plane plate. After drawing, the lines near the South Pole or the North Pole can be converted from a spherical diagram to a plane diagram;

[0052] S3, unfasten the nylon buckle 132 and unfold the projection component 13.

[0053] The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Among them, the same parts are represented by the same figure numerals. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively. Therefore: All equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A multi-purpose globe model, characterized in that: The invention comprises a semicircular plate (1), an arcuate plate (2), a circular plate (3), a stabilizing plate (4) and a spherical shell (5); the edge of the circular plate (3) is provided with a long groove (301) and a short groove (302), and the long groove (301) and the short groove (302) are arranged along the diameter direction of the circular plate (3); the straight edge of the semicircular plate (1) is provided with a clamping long groove (101) and a clamping short groove (102), and the clamping long groove (101) and the clamping short groove (102) are both perpendicular to the straight edge of the semicircular plate (1); the clamping long groove (101) coincides with the center of the semicircular plate (1); two clamping short grooves (102) are arranged, and the two clamping short grooves (102) are symmetrical about the center of the clamping long groove (101); The semicircular plate (1) and the arcuate plate (2) are both provided with a plurality of the long grooves (301) and the short grooves (302) are both provided with a plurality of the long grooves (301) and are evenly distributed on the circular plate (3), one short groove (302) is spaced between two long grooves (301), and one long groove (301) is spaced between two short grooves (302), the semicircular plate (1) corresponds to the number of the long grooves (301), and the arcuate plate (2) corresponds to the number of the short grooves (302); The long groove (301) and the engaging long groove (101) are engaged with each other, the arcuate plate (2) is engaged in the short groove (302), two stabilizing plates (4) are provided, and are engaged in two engaging short grooves (102) of a plurality of semicircular plates (1) one above and one below at the same time, when the arcuate plate (2) is engaged in the short groove (302), the upper and lower ends of the arcuate plate (2) are simultaneously in contact with the stabilizing plate (4), the semicircular plate (1) and the arcuate plate (2) are engaged in the circular plate (3) to form a sphere, and the spherical shell (5) covers the surface of the sphere.

2. A multi-purpose globe model according to claim 1, characterized in that: The arc-shaped edges of the semicircular flat plate (1) and the arc-shaped flat plate (2) are both provided with U-shaped grooves (6), and elastic ropes (7) are sleeved on the U-shaped grooves (6).

3. A multi-purpose globe model according to claim 2, characterized in that: The semicircular flat plate (1) and the arcuate flat plate (2) are both provided with 12 pieces, the U-shaped grooves (6) are provided with 9 pieces, the elastic rope (7) is sleeved in the U-shaped grooves (6) and corresponds to the Arctic Circle, 60° north latitude, 30° north latitude, Tropic of Cancer, Equator, Tropic of Capricorn, 30° south latitude, 60° south latitude, and Antarctic Circle in sequence, the semicircular flat plate (1) and the arcuate flat plate (2) represent meridians, the elastic rope (7) has two different colors, the elastic rope (7) on the north and south 60° and 30° latitudes and the equator has the same color, and the elastic rope (7) on the Arctic Circle, Tropic of Capricorn has the same color.

4. A multi-purpose globe model according to claim 1, characterized in that: The spherical shell (5) comprises a chart layer (501) and a covering paper layer (502), wherein the chart layer (501) is pasted on the surface of the covering paper layer (502), the covering paper layer (502) is a polygon, and the chart layer (501) is a plane picture cut out of a hemispherical shape, wherein the plane picture comprises a latitude and longitude grid picture, a globe picture, or a climate and ocean current picture.

5. A multi-purpose globe model according to claim 4, characterized in that: When the chart layer (501) is pasted on the covering paper layer (502), the covering paper layer (502) has an uncovered blank area (503). The spherical shell (5) is bent in one direction and the blank area (503) is folded or concave in the bending direction. The spherical shell (5) is transformed from a two-dimensional plane into a three-dimensional hemispherical shape and can be covered on a sphere.

6. The multi-purpose globe model according to claim 1, characterized in that: It also includes a vertical rod (8), a column (9) and a bracket (10), wherein the vertical rod (8) is vertical and passes through the circular flat plate (3) and the stabilizing plate (4), the column (9) has a through hole and is connected to both ends of the vertical rod (8), and the column (9) is located in the sphere, and the bracket (10) has a protrusion, and the sphere is detachably connected to the bracket (10) through the through hole of the column (9).

7. A map projection device using the multi-purpose globe model according to any one of claims 1 to 6, characterized in that: The invention comprises a light emitting body (11), a projection circuit (12) and a projection element (13), wherein the projection circuit (12) comprises a power supply and a switch, and a mounting hole is provided at the center of the circular flat plate (3), and the light emitting body (11) is mounted on the mounting hole; the projection element (13) is a cone, a cylinder and a rectangular plane, and the cone, the cylinder and the rectangular plane plate are composed of a transparent flexible material (131) and a nylon buckle (132), the cone is formed by curling a plane sector and a nylon buckle (132) arranged on the side of the plane sector, and the cylinder is formed by curling a plane rectangle and a nylon buckle (132) arranged on the side of the plane sector.

8. The map projection device of a multi-purpose globe model according to claim 7, characterized in that: It also includes a support (14) and an erasable pen. A light emitting body (11) is installed in the support (14), and the light emitting body (11) is connected to the projection circuit (12). The erasable pen can draw on a transparent flexible material (131) of a cone, a cylinder and a rectangular flat plate.

9. A projection learning method using the map projection device of the multi-purpose globe model according to claim 8, characterized in that: The following steps are involved: S1, assembling the semicircular plate (1), the arcuate plate (2), the circular plate (3), the stabilizing plate (4), the spherical shell (5) and the luminous body (11), connecting the luminous body (11) to the power supply of the projection circuit (12) and energizing them to form a luminous sphere; S2, covering the projection element (13) on the luminous sphere, and using an erasable pen to draw patterns and lines on the spherical shell (5); S3, unfasten the nylon buckle (132) and unfold the projection component (13).

10. The projection learning method of the map projection device of the multi-purpose globe model according to claim 9, characterized in that: In step S2, when the projection element (13) is a cone, when the luminous sphere is luminous, the cone is placed on the southern hemisphere or the northern hemisphere, and students can use an erasable pen to draw the lines or ocean currents near the Tropic of Capricorn or the Tropic of Cancer on the globe on the cone. After drawing, the cone is unfolded into a plane, and the lines near the Tropic of Capricorn or the Tropic of Cancer can be converted from a spherical diagram to a plane diagram; when the projection element (13) is a cylinder, when the luminous sphere is luminous, the cylinder is placed on the equator, and students can use an erasable pen to draw the lines or ocean currents near the Tropic of Capricorn or the Tropic of Cancer on the globe on the cone. The lines near the equator of the globe or the ocean current lines are drawn on the cylindrical sleeve with an erasable pen, and after the drawing is completed, the cylindrical sleeve is unfolded into a plane, and the lines near the equator can be converted from a spherical diagram to a plane diagram; when the projection member (13) adopts a rectangular plane plate, when the luminous sphere is luminous, the rectangular plane plate is put on the South Pole or the North Pole, and students can use an erasable pen to draw the lines near the South Pole or the North Pole of the globe or the ocean current lines on the rectangular plane plate, and after the drawing is completed, the lines near the South Pole or the North Pole can be converted from a spherical diagram to a plane diagram.

Images