Multifunctional assembled mathematics teaching aid

Abstract

The utility model relates to the technical field of teaching aids, and discloses a multifunctional assembled math teaching aid which comprises a ruler body, a rotating shaft is fixed in the middle of one side of the top end of the ruler body, a circular ring is movably connected to the middle of the periphery of the rotating shaft, a rod sleeve is fixed in the middle of the other side of the periphery of the circular ring, and a movable rod is movably connected into the rod sleeve. A sucker is fixed to the top end of the rotating shaft, a fixing ring is fixedly connected to the other side of the periphery of the rod sleeve, a positioning pin is movably connected to the middle in the fixing ring, and a spring is arranged in the middle of the periphery of the positioning pin. According to the circle drawing device, by pulling the pull ring, the positioning pin is separated from the limiting hole in the movable rod, at the moment, the movable rod can slide in the rod sleeve, then the length of the movable rod can be adjusted, a user can be assisted in adjusting the radius of a drawn circle, after adjustment is completed, a worker fixes chalk in the fixing device, and then the circle can be drawn; and a worker can conveniently adjust the radius of a drawn circle.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching tools, in particular to a multifunctional assembled mathematics teaching aid. Background Art

[0002] Mathematics is a universal means for humans to strictly describe the abstract structure and pattern of things. It can be applied to any problem in the real world. All mathematical objects are essentially artificially defined. In this sense, mathematics belongs to formal science rather than natural science. Different mathematicians and philosophers have a series of views on the exact scope and definition of mathematics. In the development of human history and social life, mathematics plays an irreplaceable role. It is also an indispensable basic tool for learning and studying modern science and technology. Modern mathematics teachers need to draw pictures when teaching knowledge, so they need a multifunctional mathematics teaching drawing aid, such as a multifunctional mathematics teaching drawing aid proposed by Chinese Patent Publication No. CN214324756U. The circle drawing mechanism mentioned therein can assist teaching staff in drawing circles and facilitate the use of teaching staff.

[0003] However, in actual use, when drawing a circle, the staff needs to adjust the drawing radius of the circle by using a fixed knob, which is cumbersome and inconvenient for the staff to use. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a multifunctional assembled mathematics teaching aid.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a multifunctional assembled mathematics teaching aid, including a ruler body, a rotating shaft is fixed in the middle of one side of the top end of the ruler body, a circular ring is movably connected in the middle of the outer circumference of the rotating shaft, a rod sleeve is fixed in the middle of the other side of the outer circumference of the circular ring, a movable rod is movably connected in the rod sleeve, a suction cup is fixed to the top end of the rotating shaft, a fixing ring is fixedly connected to the other side of the outer circumference of the rod sleeve, a positioning pin is movably connected in the middle of the fixing ring, a spring is arranged in the middle of the outer circumference of the positioning pin, a pull ring is fixed to the top end of the positioning pin, and evenly distributed limiting holes are opened in the outer circumference of the movable rod.

[0006] As a further description of the above technical solution:

[0007] A fixer is fixed on one end of the movable rod away from the rod sleeve, and a fixing bolt is threadedly connected on one side of the fixer away from the movable rod.

[0008] As a further description of the above technical solution:

[0009] The front side of the ruler body is provided with an oblique angle, the front side of the top end of the ruler body is provided with ruler scale lines, the middle part of the other side of the top end of the ruler body is provided with a protractor, and the upper surface of the protractor is provided with angle scale lines.

[0010] As a further description of the above technical solution:

[0011] A fixing plate is slidably connected to the middle of the fixing ring, a positioning pin is movably connected to the middle of the fixing plate, one end of the spring is fixed to the middle of the top of the fixing plate, and the other end of the spring is fixed to the middle of the top of the fixing ring.

[0012] As a further description of the above technical solution:

[0013] A hanging hole is provided at the upper part of the other side of the top end of the ruler body, and a through groove is provided at the middle part of one side of the top end of the ruler body.

[0014] As a further description of the above technical solution:

[0015] A clamping ring is fixedly connected to one side of the middle part of the top end of the ruler body, and a rod sleeve is clamped in the clamping ring.

[0016] The utility model has the following beneficial effects:

[0017] In the utility model, by pulling the pull ring, the positioning pin is disengaged from the limiting hole on the movable rod. At this time, the movable rod can slide in the rod sleeve, so that the length of the movable rod can be adjusted, which can assist the user to adjust the radius of the circle. After the adjustment is completed, the staff fixes the chalk in the fixture, and then the circle can be drawn, which is convenient for the staff to adjust the radius of the circle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a main perspective schematic diagram of a multifunctional assembled mathematics teaching aid proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the partial structure of a rod sleeve of a multifunctional assembled mathematics teaching aid proposed by the utility model;

[0020] Figure 3 The utility model provides a schematic diagram of the internal structure of a fixing ring of a multifunctional assembled mathematics teaching aid.

[0021] Legend:

[0022] 1. Bevel; 2. Ruler scale lines; 3. Hanging hole; 4. Ruler body; 5. Protractor; 6. Angle scale lines; 7. Fixer; 8. Movable rod; 9. Rod sleeve; 10. Snap ring; 11. Suction cup; 12. Ring; 13. Through groove; 14. Rotating shaft; 15. Pull ring; 16. Locating pin; 17. Fixing ring; 18. Limiting hole; 19. Fixing bolt; 20. Spring; 21. Fixing plate. DETAILED DESCRIPTION

[0023] 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.

[0024] Reference Figure 1-3 The utility model provides an embodiment: a multifunctional assembled mathematics teaching aid, including a ruler body 4, a rotating shaft 14 is fixed in the middle of one side of the top of the ruler body 4, a circular ring 12 is movably connected in the middle of the outer circumference of the rotating shaft 14, and a rod sleeve 9 is fixed in the middle of the other side of the outer circumference of the circular ring 12. By setting the rotating shaft 14 and the circular ring 12, the rod sleeve 9 can be assisted to rotate along the rotating shaft 14, so as to assist the staff to draw a circle on the blackboard, which is convenient for the staff to use. A movable rod 8 is movably connected in the rod sleeve 9, and a suction cup 11 is fixed on the top of the rotating shaft 14. By setting the suction cup 11, the combined teaching aid can be adsorbed on the surface of the blackboard through atmospheric pressure. A fixing ring 17, a positioning pin 16 is movably connected in the middle of the fixing ring 17, a spring 20 is provided in the middle of the outer periphery of the positioning pin 16, a pull ring 15 is fixed to the top of the positioning pin 16, and evenly distributed limiting holes 18 are opened on the outer periphery of the movable rod 8. Pull the pull ring 15 to allow the positioning pin 16 to move until the positioning pin 16 is disengaged from the limiting holes 18 on the movable rod 8. At this time, the movable rod 8 can slide in the rod sleeve 9, so that the length of the movable rod 8 can be adjusted, which can assist the user in adjusting the radius of the circle. After the adjustment is completed, the staff fixes the chalk in the fixture 7, and then can draw a circle. After use, the staff snaps the rod sleeve 9 into the clamping ring 10 for easy carrying.

[0025] A holder 7 is fixed to one end of the movable rod 8 away from the rod sleeve 9, and a fixing bolt 19 is threadedly connected to one side of the holder 7 away from the movable rod 8. By setting the holder 7 and the fixing bolt 19, it is convenient for the staff to fix the chalk in the holder 7, so that the staff can draw the corresponding graphics. A bevel 1 is set on the front side of the ruler body 4, and a ruler scale line 2 is set on the front side of the top of the ruler body 4. A protractor 5 is set in the middle of the other side of the top of the ruler body 4, and an angle scale line 6 is set on the upper surface of the protractor 5. By setting the bevel 1, the ruler scale line 2, the protractor 5 and the angle scale line 6, the staff can be assisted to perform corresponding teaching operations, which is convenient for teaching staff to carry out relevant teaching. A fixed plate 21 is slidably connected to the middle of the fixed ring 17, and the fixed plate A locating pin 16 is movably connected to the middle part of the inner part of 21, one end of a spring 20 is fixed to the middle part of the top of the fixing plate 21, and the other end of the spring 20 is fixed to the middle part of the top of the fixing ring 17. By setting the spring 20, the locating pin 16 can be automatically reset when the external force restriction is lost, so that the movable rod 8 can be fixed again, which is convenient for use. A hanging hole 3 is provided on the upper part of the other side of the top of the ruler body 4, and a through groove 13 is provided in the middle part of one side of the top of the ruler body 4. A snap ring 10 is fixedly connected to one side of the middle part of the top of the ruler body 4, and a rod sleeve 9 is clamped in the snap ring 10. By setting the snap ring 10, and the snap ring 10 is made of flexible material, not only can the rod sleeve 9 be fixed when not in use, but also, it can avoid motion interference of the rod sleeve 9 during rotation, thereby affecting the rotation.

[0026] Working principle: When the teaching aid is actually used, the user can draw lines on the blackboard with the ruler body 4 and measure the corresponding angle size with the protractor 5. When the user needs to draw a circle, the suction cup 11 is adsorbed on the surface of the blackboard, and then the pull ring 15 is pulled to allow the positioning pin 16 to move until the positioning pin 16 is disengaged from the limiting hole 18 on the movable rod 8. At this time, the movable rod 8 can slide in the rod sleeve 9, so that the length of the movable rod 8 can be adjusted, which can assist the user in adjusting the radius of the circle. After the adjustment is completed, the staff fixes the chalk in the holder 7, and then the circle can be drawn. After use, the staff snaps the rod sleeve 9 into the snap ring 10 for easy carrying.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional assembled mathematics teaching aid, comprising a ruler body (4), characterized in that: A rotating shaft (14) is fixed at the middle of one side of the top end of the ruler body (4); a circular ring (12) is movably connected to the middle of the outer circumference of the rotating shaft (14); a rod sleeve (9) is fixed at the middle of the other side of the outer circumference of the circular ring (12); a movable rod (8) is movably connected inside the rod sleeve (9); a suction cup (11) is fixed at the top end of the rotating shaft (14); a fixing ring (17) is fixedly connected to the other side of the outer circumference of the rod sleeve (9); a positioning pin (16) is movably connected to the middle of the inner circumference of the fixing ring (17); a spring (20) is provided at the middle of the outer circumference of the positioning pin (16); a pull ring (15) is fixed at the top end of the positioning pin (16); uniformly distributed limiting holes (18) are provided on the outer circumference of the movable rod (8); the movable rod (8) is away from the rod A holder (7) is fixed to one end of the sleeve (9), and a fixing bolt (19) is threadedly connected to the side of the holder (7) away from the movable rod (8). A bevel (1) is arranged on the front side of the ruler body (4), and a ruler scale line (2) is arranged on the front side of the top of the ruler body (4). A protractor (5) is arranged in the middle of the other side of the top of the ruler body (4), and an angle scale line (6) is arranged on the upper surface of the protractor (5). A fixing plate (21) is slidably connected to the middle of the fixing ring (17), and a positioning pin (16) is movably connected to the middle of the fixing plate (21). One end of the spring (20) is fixed to the middle of the top of the fixing plate (21), and the other end of the spring (20) is fixed to the middle of the top of the fixing ring (17).

2. A multifunctional assembled mathematics teaching aid according to claim 1, characterized in that: A hanging hole (3) is provided at the upper portion of the other side of the top end of the ruler body (4), and a through slot (13) is provided at the middle portion of one side of the top end of the ruler body (4).

3. A multifunctional assembled mathematics teaching aid according to claim 1, characterized in that: A clamping ring (10) is fixedly connected to one side of the middle part of the top end of the ruler body (4), and a rod sleeve (9) is clamped in the clamping ring (10).

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