Geometric figure motion trail display device

Abstract

The utility model discloses a geometric figure motion trail display device, which relates to the technical field of math teaching aids and comprises a vertical plate, a transverse plate is fixedly mounted on the lower side of the vertical plate, a first supporting column and a second supporting column are fixedly mounted on two sides of the transverse plate, notches are arranged on the upper sides of the first supporting column and the second supporting column, and racks and clamping grooves are placed in the notches. The clamping groove is located on the upper side of the rack, the interior of the clamping groove is of a hollow structure, a sliding groove is further formed in the clamping groove, a center rod is arranged in the sliding groove in a matched mode, the diameter of the center rod is the same as that of the sliding groove, the center rod can rotate and slide in the sliding groove, and a polygonal plate is installed on the center rod and can be in the shape of a regular triangle, a square, a regular pentagon, a regular hexagon and the like. According to the technical scheme, the rotating center rod can drive the polygonal plate to rotate, the motion state is clearly displayed, and observation is facilitated; the movement track of the polygonal plate can be recorded on paper through a pen, and recording and contrast learning are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of mathematics teaching aids, in particular to a geometric figure motion track display device. Background Art

[0002] Mathematical teaching aids are important tools to help children learn mathematics. These teaching aids help children better understand mathematical concepts and principles in an intuitive and vivid way. Children of different ages can choose mathematical teaching aids that suit them, so as to learn mathematics in games and improve their learning interest and effect. There are many kinds of mathematical teaching aids, including number cards, geometric figures, counters, balances, weights, etc. These teaching aids can be used to teach children concepts such as counting, addition and subtraction, multiplication and division, fractions, geometric figures, etc. At the same time, some teaching aids can also help children develop logical thinking ability, spatial imagination and creativity. When using mathematical teaching aids, parents and teachers can provide appropriate guidance and instruction according to the interests and abilities of their children. Through interaction with children, let them master mathematical knowledge in exploration and practice, and cultivate mathematical thinking and problem-solving abilities. In addition, it is also important to choose appropriate mathematical teaching aids. Parents and teachers can choose suitable teaching aids according to the age and interests of their children, such as wooden counters, jigsaw puzzles, geometric blocks, etc. At the same time, attention should also be paid to the quality and safety of teaching aids to ensure that children will not be harmed in the process of learning. In short, mathematical teaching aids are important auxiliary tools for children to learn mathematics. By using these teaching aids, children can learn mathematical knowledge through games and improve their interest and learning effect. Parents and teachers should choose appropriate teaching aids according to children's interests and abilities, and properly guide and instruct children's learning process to help them master mathematical knowledge and cultivate mathematical thinking and problem-solving abilities.

[0003] A Chinese patent with publication number CN109064839A discloses a cycloid demonstration teaching aid for mathematics teaching, including a No. 1 roller, a rack, a limit block, a mobile bracket, a No. 2 roller, a support plate, a suction cup and a fixed module. The No. 2 roller is rotatably connected to the lower end of the mobile bracket and rolls along the step surface on one side of the rack. The No. 1 roller is provided with a fixed module for fixing chalk. A group of support plates are provided below the rack, on which a suction cup is fixedly connected. The No. 1 roller is rotatably connected to the upper end of the mobile bracket, and the No. 2 roller is symmetrically provided at the lower end of the mobile bracket. This teaching aid can draw the trajectory of the cycloid on the blackboard, is easy to move and install, has great flexibility, and is convenient for teachers to carry during class. By intuitively observing the formation of the cycloid trajectory, it helps students better understand the characteristics of the cycloid, thereby improving the teaching quality of teachers. However, the existing technology has a complex structure and is not convenient to manufacture, and is prone to failure, and is not suitable for use in school classrooms. Utility Model Content

[0004] In view of the above technical problems, the utility model discloses a geometric figure motion trajectory display device, including a vertical plate, a horizontal plate fixedly mounted on the lower side of the vertical plate, a first support column and a second support column mounted on the horizontal plate, a card slot is mounted between the first support column and the second support column, a slide slot is arranged in the card slot, a center rod is matched in the slide slot, a polygonal plate is fixedly mounted on the first end of the center rod, and a pen is fixedly mounted on the polygonal plate. Through the above technical solution, rotating the center rod can drive the polygonal plate to rotate, clearly displaying the motion state for easy observation.

[0005] Furthermore, paper is fixed on the vertical board, and the pen draws the motion track on the paper. Through the above technical solution, the motion track of the polygonal board can be recorded on the paper by the pen, which is convenient for recording and comparing learning.

[0006] Furthermore, the polygonal plate is provided with a mounting hole, and the pen is fixedly mounted in the mounting hole. The above technical solution facilitates the fixing of the pen, and the pen can be inserted into the mounting hole more quickly and the distance can be adjusted by providing the mounting hole.

[0007] Furthermore, a rack is fixedly mounted at the lower end of the slot, and a gear is matched on the rack, and the gear is coaxial with the center rod. Through the above technical solution, the coordination of the rack and the gear can make the center rod roll more stably, ensuring the standardization and accuracy of the motion trajectory of the polygonal plate.

[0008] Furthermore, the diameters of the inscribed circles of the gear and the polygonal plate are equal. Through the above technical solution, the shape of the track left by the edge of the polygonal plate after rolling can be observed.

[0009] Furthermore, a first limiting ring and a second limiting ring are fixedly mounted on the center rod, and the center rod and the second limiting ring are respectively located on both sides of the slot.

[0010] Furthermore, a rotating wheel is fixedly mounted on the second end of the central rod. The above technical solution is convenient for people to operate by hand, and it is more labor-saving when rolling the central rod.

[0011] Furthermore, a plurality of raised rods are evenly arranged on the rotating wheel.

[0012] The beneficial effects of the utility model compared with the prior art are:

[0013] (1) Through the technical solution of the utility model, the rotating center rod can drive the polygonal plate to rotate, clearly displaying the movement state for easy observation.

[0014] (2) Through the technical solution of the utility model, the movement trajectory of the polygonal plate can be recorded on paper with a pen, which is convenient for recording and comparing learning.

[0015] (3) The technical solution of the utility model facilitates the fixing of the pen. By providing the mounting hole, the pen can be inserted therein more quickly and the distance can be adjusted.

[0016] (4) Through the technical solution of the utility model, the coordination of the rack and the gear can make the center rod roll more stably, ensuring the standardization and accuracy of the motion trajectory of the polygonal plate.

[0017] (5) Through the technical solution of the utility model, it is possible to observe the shape of the track left by the edge of the polygonal plate after rolling.

[0018] (6) The technical solution of the utility model is convenient for people to operate by hand, and it is more labor-saving when rolling the center rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The overall structure of the embodiment of the utility model is shown in FIG. Figure 1 .

[0020] Figure 2 The overall structure of the embodiment of the utility model is shown in FIG. Figure 2 .

[0021] Figure 3 The local structure of the embodiment of the utility model is shown in FIG. Figure 1 .

[0022] Figure 4 The local structure of the embodiment of the utility model is shown in FIG. Figure 2 .

[0023] Figure numbers: 1-vertical plate; 2-horizontal plate; 3-first supporting column; 4-second supporting column; 5-slot; 6-slide groove; 7-fixing bolt; 8-rotating wheel; 9-raised rod; 10-center rod; 11-first limiting ring; 12-rack; 13-gear; 14-polygonal plate; 15-mounting hole; 16-pen; 17-second limiting ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model.

[0025] like Figure 1-Figure 4A geometric figure motion trajectory display device shown in the figure includes a vertical plate 1, a horizontal plate 2 is fixedly installed on the lower side of the vertical plate 1, and a first support column 3 and a second support column 4 are fixedly installed on both sides of the horizontal plate 2. The upper sides of the first support column 3 and the second support column 4 are provided with notches, and a rack 12 and a slot 5 are placed in the notch. The slot 5 is located on the upper side of the rack 12. The slot 5 is a hollow structure. A slide groove 6 is also provided on the slot 5. A center rod 10 is matched in the slide groove 6. The diameter of the center rod 10 is the same as that of the slide groove 6, and the center rod 10 can rotate and slide in the slide groove 6.

[0026] A gear 13 is fixedly mounted on the center rod 10, and the gear 13 is located in the card slot 5. The gear 13 is meshed with the rack 12. Moving the center rod 10 can allow the gear 13 to roll on the rack 12. A polygonal plate 14 is fixedly mounted on the first end of the center rod 10. A plurality of mounting holes 15 are provided on the polygonal plate 14, specifically six in this embodiment. A pen 16 can be fixed in the mounting hole 15. Paper is fixed on the vertical plate 1, and the tip of the pen 16 is in contact with the paper. When the gear 13 rolls, the pen 16 can leave a motion track on the paper. The polygonal plate 14 can be in different shapes such as a regular hexagon, a regular pentagon, a square, an equilateral triangle, etc., for displaying motion tracks of different shapes. In this embodiment, a regular hexagon is used for display. The diameter of the inscribed circle of the polygonal plate 14 is the same as the diameter of the gear 13. If it is other geometric shapes, the inscribed circle has the same diameter as the gear 13.

[0027] A first limiting ring 11 and a second limiting ring 17 are fixedly mounted on the center rod 10 and are located on both sides of the slot 5, for fixing the position of the gear 13 and also fixing the axial position of the center rod 10. A rotating wheel 8 is fixedly mounted on the second end of the center rod 10, and a plurality of raised rods 9 are fixedly mounted on the circumferential surface of the rotating wheel 8 to increase friction and facilitate human operation, wherein the rotating wheel 8 and the center rod 10 are fixed by fixing bolts 7.

[0028] Working principle: insert the pen 16 into the mounting hole 15, stick the tape on the vertical board 1, adjust the position of the pen 16 so that the pen tip contacts the paper, manually rotate the rotating wheel 8, drive the gear 13 to roll on the rack 12, and at the same time drive the polygonal plate 14 to roll, and the pen 16 leaves a movement track on the paper.

[0029] The utility model is further described above with the help of specific embodiments, but it should be understood that the specific description here should not be construed as a limitation on the essence and scope of the utility model. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the utility model.

Claims

1. A geometric figure motion trajectory display device, characterized in that: The utility model comprises a vertical plate (1), a horizontal plate (2) is fixedly mounted on the lower side of the vertical plate (1), a first supporting column (3) and a second supporting column (4) are mounted on the horizontal plate (2), a card slot (5) is mounted between the first supporting column (3) and the second supporting column (4), a slide slot (6) is arranged in the card slot (5), a center rod (10) is matched in the slide slot (6), a polygonal plate (14) is fixedly mounted on the first end of the center rod (10), and a pen (16) is fixedly mounted on the polygonal plate (14).

2. A geometric figure motion trajectory display device according to claim 1, characterized in that: Paper is fixed on the vertical board (1), and the pen (16) draws a movement track on the paper.

3. A geometric figure motion trajectory display device according to claim 2, characterized in that: The polygonal plate (14) is provided with a mounting hole (15), and the pen (16) is fixedly mounted in the mounting hole (15).

4. A geometric figure motion trajectory display device according to claim 3, characterized in that: A rack (12) is fixedly mounted on the lower end of the clamping slot (5), a gear (13) is matched on the rack (12), and the gear (13) is coaxial with the center rod (10).

5. A geometric figure motion trajectory display device according to claim 4, characterized in that: The gear (13) and the polygonal plate (14) have the same diameter of inscribed circle.

6. A geometric figure motion trajectory display device according to claim 5, characterized in that: A first limiting ring (11) and a second limiting ring (17) are fixedly mounted on the central rod (10); the central rod (10) and the second limiting ring (17) are respectively located on two sides of the clamping groove (5).

7. A geometric figure motion trajectory display device according to claim 6, characterized in that: A rotating wheel (8) is fixedly mounted on the second end of the central rod (10).

8. A geometric figure motion trajectory display device according to claim 7, characterized in that: A plurality of raised rods (9) are evenly arranged on the rotating wheel (8).

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