Cycloid demonstration teaching aid for mathematics teaching

Abstract

The utility model discloses a cycloid demonstration teaching aid for mathematics teaching, and relates to the technical field of teaching aids, the cycloid demonstration teaching aid for mathematics teaching comprises a main ruler and a rack, one side of the main ruler is provided with a spacing groove, and the rack is fixed in the spacing groove; the gear ring is arranged on one side of the main ruler, the gear ring is meshed with the rack, a fixing disc is fixed to the middle of the interior of the gear ring, a first fixing piece is rotationally installed on the fixing disc, and a second chalk fixing sleeve is slidably installed on the side, located on the fixing disc, of the gear ring. The utility model discloses. The main ruler is fixed through the second fixing piece, the gear ring is shifted to enable the second chalk fixing sleeve to synchronously rotate along with the gear ring, then a round rolling line can be drawn, in the process, a user does not need to hold the main ruler with hands, the stability of the cycloid demonstration teaching aid in the cycloid drawing process is ensured, and the practicability of the equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching tools, and is specifically a cycloid demonstration teaching aid for mathematics teaching. Background Art

[0002] The cycloid, also known as the cycloid or the circular rolling line, is defined in mathematics as the trajectory formed by a certain point on the boundary of a circle when it moves along a straight line. It is a general cycloid. In traditional mathematics teaching simulations, teachers use tools to draw multiple circles on the blackboard, and then use the form of connecting points to reflect the law of the cycloid, which invisibly affects the teaching effect and students do not understand it very thoroughly.

[0003] The Chinese utility model patent with publication number CN210574532U discloses a cycloid demonstration teaching aid for advanced mathematics teaching. The device loosens the grip of the chalk by pressing the trigger and the elastic resistance of the reed, pushes the chalk and the blackboard, and releases the trigger to reset the splint, thereby ensuring the clarity of the cycloid motion trajectory and reducing the difficulty of teaching.

[0004] However, when using the existing cycloid demonstration teaching aid, the user fixes the teaching aid with one hand and operates the chalk moving device with the other hand to draw the required cycloid trajectory on the blackboard. This operation method is difficult to stably fix the teaching aid. If the teaching aid is not fixed stably, it is easy to cause the demonstrated cycloid to be unclear and the demonstrated cycloid to deviate or slip, thereby affecting the demonstration effect of the cycloid. Utility Model Content

[0005] The utility model provides a cycloid demonstration teaching aid for mathematics teaching, so as to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cycloid demonstration teaching aid for mathematics teaching, comprising a main ruler and a rack, a limiting groove being provided on one side of the main ruler, a rack being fixed in the limiting groove; a gear ring, the gear ring being provided on one side of the main ruler, and the gear ring being meshed with the rack, a fixed disk being fixed in the middle part of the gear ring, a first fixing member being rotatably mounted on the fixing disk, a second chalk fixing sleeve being slidably mounted on the gear ring at one side of the fixing disk; a second fixing member, the second fixing member being provided at both ends of the main ruler for fixing the main ruler, a second receiving groove being provided at the bottom of the main ruler, the second fixing member comprising a through hole provided on the main ruler, a limiting notch being symmetrically provided in the through hole, a lever being slidably mounted inside the through hole, a limiting plate being symmetrically fixed to the middle end of the lever and matching the limiting notch, a second suction cup matching the second receiving groove being rotatably mounted on the lower end of the lever, and a compression spring being provided between the upper end of the through hole and the upper end of the lever on the outer side of the lever.

[0007] As a preferred technical solution of the utility model, the first fixing member includes a connecting sleeve rotatably mounted on the fixing plate and a first receiving groove opened on the lower surface of the fixing plate, an adjusting bolt is provided in the connecting sleeve, the lower end of the adjusting bolt extends into the first receiving groove and is equipped with a first suction cup adapted to the first receiving groove.

[0008] As a preferred technical solution of the utility model, a fixing plate fixedly connected to the fixing disk is fixed in the gear ring, the upper end of the connecting sleeve is rotatably connected to a connecting frame, and the upper end of the adjusting bolt passes through the connecting frame and is threadedly connected to the connecting frame.

[0009] As a preferred technical solution of the utility model, a slide groove is provided on the upper surface of the main scale, a slide rod is fixed in the slide groove along its axial direction, and a slider is slidably installed in the slide groove, the slider is fixed to one end of the connecting frame, and a slide hole adapted to the slide rod is provided on the slider.

[0010] As a preferred technical solution of the utility model, a side plate is fixed to one end of the main ruler, and a first chalk fixing sleeve is installed on the side plate and passes through the side plate.

[0011] As a preferred technical solution of the utility model, a guide frame is fixed between one side of the fixed plate and the inner wall of the gear ring, the guide frame is slidably connected to the second chalk fixing sleeve, and a rubber sleeve is installed at the connection between the guide frame and the second chalk fixing sleeve.

[0012] Compared with the prior art, the utility model provides a cycloid demonstration teaching aid for mathematics teaching, which has the following beneficial effects:

[0013] 1. The cycloid demonstration teaching aid for mathematics teaching fixes the main ruler through the second fixing piece, and the gear ring is turned to make the second chalk fixing sleeve rotate synchronously with the gear ring, so that the circular rolling line can be drawn. In this process, the user does not need to hold the main ruler, which ensures the stability of the cycloid demonstration teaching aid when drawing the cycloid, and improves the practicality of the equipment.

[0014] 2. The cycloid demonstration teaching aid for mathematics teaching fixes the gear ring through the first fixing piece. Pressing the gear ring and rotating the main ruler can assist the first chalk fixing sleeve on the main ruler to draw an involute, thereby improving the demonstration variety of the utility model and further improving the practicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 Another perspective view of the present utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the gear ring in the utility model;

[0018] Figure 4 For this utility model Figure 3 Another perspective of the picture;

[0019] Figure 5 This is a schematic diagram of the installation structure of the first suction cup in the utility model;

[0020] Figure 6 It is a schematic diagram of the installation structure of the second suction cup in the utility model.

[0021] In the figure: 1. main ruler; 2. gear ring; 3. limit groove; 4. rack; 5. slide groove; 6. slide rod; 7. slide block; 8. connecting frame; 9. connecting sleeve; 10. fixed plate; 11. guide frame; 12. adjusting bolt; 13. side plate; 14. first chalk fixing sleeve; 15. first suction cup; 16. second chalk fixing sleeve; 17. second storage groove; 18. second suction cup; 19. fixing plate; 20. first storage groove; 21. through hole; 22. limit notch; 23. lever; 24. limit plate; 25. compression spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of 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 are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 6The utility model discloses a cycloid demonstration teaching aid for mathematics teaching, comprising a main ruler 1 and a rack 4. A limiting groove 3 is provided on one side of the main ruler 1, and a rack 4 is fixed in the limiting groove 3. In order to further realize the demonstration of the cycloid trajectory, the cycloid demonstration teaching aid for mathematics teaching provided by this embodiment also includes a gear ring 2, which is arranged on one side of the main ruler 1, and the gear ring 2 is meshed with the rack 4. A fixed disk 10 is fixed in the middle part of the gear ring 2, and a first fixing member is rotatably installed on the fixing disk 10. A second chalk fixing sleeve 16 is slidably installed on the gear ring 2 on one side of the fixing disk 10. In order to avoid the equipment from being in the demonstration process, In order to prevent the main ruler 1 from shaking, the present embodiment also includes a second fixing member, which is arranged at both ends of the main ruler 1 to fix the main ruler 1. A second receiving groove 17 is provided at the bottom of the main ruler 1. The second fixing member includes a through hole 21 provided on the main ruler 1. A limiting notch 22 is symmetrically provided in the through hole 21, and a lever 23 is slidably installed inside the through hole 21. A limiting plate 24 adapted to the limiting notch 22 is symmetrically fixed to the middle end of the lever 23. A second suction cup 18 adapted to the second receiving groove 17 is rotatably installed at the lower end of the lever 23, and a compression spring 25 is provided on the outer side of the lever 23 between the upper end of the through hole 21 and the upper end of the lever 23.

[0024] In this embodiment, the chalk is fixed in the second chalk fixing sleeve 16, and the lever 23 is rotated to insert the limit plate 24 into the through hole 21. Under the elastic force of the compression spring 25, the lever 23 slides in the through hole 21 and the limit plate 24 extends out from the through hole 21. The lever 23 is rotated again to make the limit plate 24 abut against the lower end of the through hole 21, thereby achieving the fixation of the lever 23. At this time, the second suction cup 18 extends from the second receiving groove 17, and the main ruler 1 can be fixed to the surface of the blackboard through the second suction cup 18. At this time, the gear ring 2 is turned to make the second chalk fixing sleeve 16 rotate synchronously with the gear ring 2, thereby achieving the drawing of the circular rolling line. In this process, the user does not need to hold the main ruler 1 by hand, thereby ensuring the stability of the cycloid demonstration teaching aid when drawing the cycloid, thereby improving the practicality of the equipment.

[0025] like Figure 3-Figure 5 As shown, the above-mentioned first fixing member includes a connecting sleeve 9 rotatably mounted on the fixing plate 10 and a first receiving groove 20 opened on the lower surface of the fixing plate 10, and an adjusting bolt 12 is provided in the connecting sleeve 9. The lower end of the adjusting bolt 12 extends into the first receiving groove 20 and is installed with a first suction cup 15 adapted to the first receiving groove 20.

[0026] When in use, the present embodiment can extend the first suction cup 15 from the first receiving groove 20 by rotating the adjusting bolt 12, and then the gear ring 2 can be fixed. At this time, pressing the gear ring 2 and rotating the main ruler 1 can assist the main ruler 1 in drawing an involute, thereby improving the demonstration type of the present utility model and further improving the practicability of the device.

[0027] like Figure 3-Figure 5As shown, in order to facilitate the rotation of the gear ring 2, a fixing plate 19 fixedly connected to the fixing disk 10 is fixed inside the gear ring 2, so that the fixing disk 10 rotates synchronously with the gear ring 2. In addition, in order to improve the stability of the gear ring 2, a connecting frame 8 is rotatably connected to the upper end of the connecting sleeve 9, and the upper end of the adjusting bolt 12 passes through the connecting frame 8 and is threadedly connected to the connecting frame 8, thereby facilitating the position adjustment of the adjusting bolt 12.

[0028] like Figure 1 As shown, a slide groove 5 is provided on the upper surface of the main scale 1, a slide rod 6 is fixed in the slide groove 5 along its axial direction, and a slider 7 is slidably installed in the slide groove 5, the slider 7 is fixed to one end of the connecting frame 8, and a slide hole adapted to the slide rod 6 is provided on the slider 7. Through the sliding connection between the slide hole and the slide rod 6, the slider 7 slides in the slide groove 5, which is beneficial to the movement of the traction connecting frame 8, so that the gear ring 2 can be pulled and limited to ensure the stability of the gear ring 2 when it rotates.

[0029] like Figure 1 and Figure 2 As shown, a side plate 13 is fixed at one end of the main ruler 1, and a first chalk fixing sleeve 14 is installed on the side plate 13 and passes through it. Preferably, the inner walls of the first chalk fixing sleeve 14 and the second chalk fixing sleeve 16 are both inverted "V" structures to facilitate the installation of chalk.

[0030] like Figure 5 As shown, a guide frame 11 is fixed between one side of the fixed plate 10 and the inner wall of the gear ring 2, the guide frame 11 is slidably connected to the second chalk fixing sleeve 16, and a rubber sleeve is installed at the connection between the guide frame 11 and the second chalk fixing sleeve 16. By setting the rubber sleeve, the friction between the second chalk fixing sleeve 16 and the guide frame 11 is increased, thereby improving the stability of the second chalk fixing sleeve 16.

[0031] The working principle and use process of the utility model are as follows: when in use, the chalk is fixed in the second chalk fixing sleeve 16, and the lever 23 is rotated to make the limit plate 24 insert into the through hole 21. Under the elastic force of the compression spring 25, the lever 23 slides in the through hole 21 and the limit plate 24 extends out from the through hole 21. The lever 23 is rotated again to make the limit plate 24 abut against the lower end of the through hole 21, and then the lever 23 is fixed. At this time, the second suction cup 18 extends from the second receiving groove 17, and the main ruler 1 can be fixed to the surface of the blackboard through the second suction cup 18. At this time, the gear ring 2 is moved so that the second chalk fixing sleeve 16 rotates synchronously with the gear ring 2, and then the drawing of the circular rolling line can be realized. In this process, the user does not need to hold the main ruler 1 with his hands, thereby ensuring the stability of the cycloid demonstration teaching aid when drawing the cycloid and improving the practicality of the equipment. By rotating the adjusting bolt 12, the first suction cup 15 is extended from the inside of the first receiving groove 20, and then the gear ring 2 can be fixed. At this time, pressing the gear ring 2 and rotating the main ruler 1 can assist the main ruler 1 in drawing the involute, thereby improving the demonstration type of the utility model and further improving the practicality of the equipment.

[0032] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cycloid demonstration teaching aid for mathematics teaching, comprising a main ruler (1), characterized in that: Also includes: A rack (4), a limiting groove (3) is provided on one side of the main scale (1), and the rack (4) is fixed in the limiting groove (3); A gear ring (2), the gear ring (2) being arranged on one side of the main scale (1), and the gear ring (2) being meshed with a rack (4), a fixed disk (10) being fixed in the middle of the gear ring (2), a first fixing member being rotatably mounted on the fixed disk (10), and a second chalk fixing sleeve (16) being slidably mounted on one side of the fixed disk (10) of the gear ring (2); A second fixing member, the second fixing member is arranged at both ends of the main scale (1) for fixing the main scale (1), a second receiving groove (17) is provided at the bottom of the main scale (1), the second fixing member comprises a through hole (21) provided on the main scale (1), a limiting notch (22) is symmetrically provided in the through hole (21), a lever (23) is slidably installed inside the through hole (21), a limiting plate (24) adapted to the limiting notch (22) is symmetrically fixed at the middle end of the lever (23), a second suction cup (18) adapted to the second receiving groove (17) is rotatably installed at the lower end of the lever (23), and a compression spring (25) is provided on the outer side of the lever (23) between the upper end of the through hole (21) and the upper end of the lever (23).

2. A cycloid demonstration teaching aid for mathematics teaching according to claim 1, characterized in that: The first fixing member comprises a connecting sleeve (9) rotatably mounted on a fixing plate (10) and a first receiving groove (20) provided on a lower surface of the fixing plate (10); an adjusting bolt (12) is provided in the connecting sleeve (9); the lower end of the adjusting bolt (12) extends into the first receiving groove (20) and is provided with a first suction cup (15) adapted to the first receiving groove (20).

3. A cycloid demonstration teaching aid for mathematics teaching according to claim 2, characterized in that: A fixing plate (19) fixedly connected to a fixing plate (10) is fixed inside the gear ring (2); the upper end of the connecting sleeve (9) is rotatably connected to a connecting frame (8); the upper end of the adjusting bolt (12) passes through the connecting frame (8) and is threadedly connected to the connecting frame (8).

4. A cycloid demonstration teaching aid for mathematics teaching according to claim 3, characterized in that: A slide groove (5) is provided on the upper surface of the main ruler (1), a slide rod (6) is fixed in the slide groove (5) along its axial direction, and a slider (7) is slidably installed in the slide groove (5), the slider (7) is fixedly connected to one end of the connecting frame (8), and a slide hole adapted to the slide rod (6) is provided on the slider (7).

5. A cycloid demonstration teaching aid for mathematics teaching according to claim 4, characterized in that: A side plate (13) is fixed to one end of the main ruler (1), and a first chalk fixing sleeve (14) is installed on the side plate (13) and passes through the side plate (13).

6. A cycloid demonstration teaching aid for mathematics teaching according to any one of claims 1 to 5, characterized in that: A guide frame (11) is fixed between one side of the fixing plate (10) and the inner wall of the gear ring (2), the guide frame (11) is slidably connected to the second chalk fixing sleeve (16), and a rubber sleeve is installed at the connection between the guide frame (11) and the second chalk fixing sleeve (16).

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