Triangle area demonstration teaching aid

Abstract

The utility model provides a triangle area demonstration teaching aid. Comprising a plurality of triangular demonstration boards, a first mounting groove, a second mounting groove and a clamping notch are formed in the side wall of each triangular demonstration board, the edge of each first mounting groove extends inwards to form a first blocking ring, and the edge of each clamping notch extends inwards to form a second blocking part; a first clamping assembly is installed in the first installation groove, the side wall of an ejector pin of the first clamping assembly extends outwards to form an annular protrusion, and the outer side of the ejector pin is sleeved with a reset spring. A second clamping assembly is installed in the second installation groove, the middle of a swing rod of the second clamping assembly is hinged to the groove wall of the second installation groove, the near end of the swing rod can be matched with the ejector pin end of the first clamping assembly, the far end of the swing rod extends to form a clamping part, and the magnet is fixedly arranged at the position close to the near end of the swing rod. Through the structural design, students can combine the two triangular demonstration boards into a parallelogram, so that the calculation process of the area of the triangle can be visually seen.

Description

Technical Field

[0001] The utility model relates to the field of teaching tools, in particular to a triangle area demonstration teaching aid for intuitively demonstrating a method for calculating the area of a triangle. Background Art

[0002] Calculating the area of a triangle is a crucial topic in mathematics instruction. However, traditional teaching methods often make it difficult for students to intuitively understand the process. Therefore, a teaching aid is needed that can intuitively demonstrate the process of calculating the area of a triangle to help students better understand this topic.

[0003] The utility model with application number CN201320440068.2 relates to a mathematical teaching aid that allows the shape of a triangle to change while the base, height, and area remain unchanged. The prior art has not yet provided a teaching aid suitable for this knowledge point. In order to address the deficiencies of the prior art, the utility model proposes a variable triangle area demonstration device, which can demonstrate that the shape of a triangle changes while the base and height remain unchanged. The technical solution adopted by the utility model to solve its technical problems is: a variable triangle area demonstration device, characterized in that: the line connecting the first fixed end and the second fixed end is parallel to the sliding rod, the sliding rod is provided with a slider that can slide along the sliding rod, and the slider is provided with a third fixed end, the two ends of the first rubber rope are fixedly connected to the first fixed end and the third fixed end respectively, the two ends of the second rubber rope are fixedly connected to the second fixed end and the third fixed end respectively, and the plane determined by the first rubber rope and the second rubber rope is parallel to the plane where the panel is located.

[0004] However, the mathematical teaching aids in the above patented technology cannot allow students to intuitively demonstrate the calculation process of the area of a triangle, and cannot make it easy for students to understand and master it. Utility Model Content

[0005] The purpose of this utility model is to provide a triangle area demonstration teaching aid to solve the problems raised in the above background technology:

[0006] (1) How to improve the structure to demonstrate the calculation process of triangle area intuitively so that students can understand and master it more easily.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A teaching aid for demonstrating the area of a triangle;

[0009] The invention comprises a plurality of triangular demonstration boards, wherein two triangular demonstration boards can be combined into a parallelogram on the same plane, and at least one side wall of the triangular demonstration board is provided with a first mounting groove, a second mounting groove, and a snap-fitting notch. A first blocking ring extends inwardly from an edge of the first mounting groove near the opening, and a second blocking portion extends inwardly from an edge of the snap-fitting notch near the opening.

[0010] A first engaging assembly is installed in the first mounting groove, the first engaging assembly including an ejector pin and a return spring. The axial length of the ejector pin is less than the depth of the first mounting groove. An annular protrusion extends outward from a side wall of the ejector pin away from the opening of the first mounting groove. The return spring is sleeved on the outer side of the ejector pin. One end of the return spring abuts against the annular protrusion of the ejector pin, and the other end of the return spring abuts against the first barrier ring of the first mounting groove. The ejector pin can overcome the elastic force of the return spring and extend out of the first mounting groove.

[0011] A second engaging assembly is installed in the second mounting groove, and the second engaging assembly includes a swing rod and a magnet. The middle portion of the swing rod is hinged to the groove wall of the second mounting groove, the proximal end of the swing rod can be engaged with the ejector end of the first engaging assembly, and a engaging portion extends from the distal end of the swing rod. The magnet is fixedly arranged near the proximal end of the swing rod and is located on a side away from the opening of the second mounting groove relative to the proximal end of the swing rod.

[0012] After the adjacent triangular demonstration plates are combined and matched, the ejector pin of the first engaging component of one triangular demonstration plate is first extended into the second mounting groove under the action of the magnet of the second engaging component of the other triangular demonstration plate. The ejector pin overcomes the elastic force of the return spring of the first engaging component and drives the proximal end of the swing rod of the second engaging component of the other triangular demonstration plate to swing. The engaging portion at the distal end of the swing rod extends out of the second mounting groove and cooperates with the second blocking portion of the engaging slot of the adjacent triangular demonstration plate.

[0013] On the basis of the above technical solution, the present invention can also be improved as follows.

[0014] Furthermore, the middle portion of the rocker arm of the second engaging assembly is hinged to the slot wall of the second mounting slot via a pin.

[0015] Furthermore, a torsion spring is sleeved on the pin shaft, one end of the torsion spring is fixed to the groove wall of the second installation groove, and the other end of the torsion spring is fixed to the rocker arm.

[0016] Furthermore, the three side walls of the triangular demonstration board are respectively provided with a first mounting groove, a second mounting groove and a locking groove.

[0017] Furthermore, the magnet is pre-embedded inside the triangular demonstration board.

[0018] This structural design allows students to combine two triangular demonstration boards into a parallelogram, allowing them to intuitively see the process of calculating the area of a triangle. Furthermore, the coordination between the locking portion of the pendulum rod and the locking notch ensures a stable connection, making operation more convenient and safe for students.

[0019] The triangle area demonstration teaching aid of this utility model is not only simple in structure and easy to operate, but also can intuitively demonstrate the calculation process of triangle area, so that students can better understand and master the calculation method of triangle area. At the same time, the teaching aid can also be used for interactive teaching in the classroom to stimulate students' learning interest and creativity.

[0020] In practical applications, the triangle area demonstration teaching aid of the present invention can be adjusted and improved as needed. For example, triangle demonstration boards of different shapes can be added to accommodate teaching content of varying difficulty and requirements. The snap-fit assembly can also be improved to make it more flexible and stable, thereby increasing the lifespan and safety of the teaching aid.

[0021] The triangle area demonstration teaching aid of the utility model has the advantages of simple structure, easy operation, and intuitive demonstration of the triangle area calculation process. It is suitable for fields such as mathematics teaching and popular science education, and has broad market prospects and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of a structural schematic diagram of an embodiment of the triangle area demonstration teaching aid.

[0023] Figure 2 yes Figure 1 Magnified view of part A.

[0024] Figure 3 yes Figure 1 Enlarged view of part B

[0025] Figure 4 yes Figure 1 Enlarged view of part C.

[0026] Description of the numbers in the figure:

[0027] Triangular demonstration board 100; first mounting slot 110; first blocking ring 111; second mounting slot 120; engaging notch 130; second blocking portion 131; ejector pin 210; annular protrusion 211; return spring 220; rocker arm 310; distal end 311; engaging portion 312; proximal end 313; magnet 320. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only implementations.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] See also Figures 1 to 4 .

[0032] The triangle area demonstration teaching aid includes two triangle demonstration boards 100 .

[0033] Two triangular demonstration boards 100 can be combined into a parallelogram on the same plane. The three side walls of the triangular demonstration board 100 are respectively provided with a first installation groove 110 , a second installation groove 120 and a locking notch 130 .

[0034] A first mounting groove 110, a second mounting groove 120 and a snap-fitting groove 130 are provided on each side wall of the triangular demonstration board 100. A first blocking ring 111 extends inward from the edge of the first mounting groove 110 near the opening, and a second blocking portion 131 extends inward from the edge of the snap-fitting groove 130 near the opening to cooperate with the snap-fitting portion 312 of the rocker arm 310.

[0035] A first engaging assembly 200 is installed in the first mounting groove 110. The first engaging assembly 200 includes a ejector pin 210 and a return spring 220. The axial length of the ejector pin 210 is less than the depth of the first mounting groove 110. An annular protrusion 211 extends outward from the side wall of the ejector pin 210 away from the opening of the first mounting groove 110. The return spring 220 is sleeved on the outside of the ejector pin 210. One end of the return spring 220 abuts against the annular protrusion 211 of the ejector pin 210, and the other end of the return spring 220 abuts against the first barrier ring 111 of the first mounting groove 110. The ejector pin 210 can overcome the elastic force of the return spring 220 and extend out of the first mounting groove 110.

[0036] A second engaging assembly 300 is installed in the second mounting groove 120. The second engaging assembly 300 includes a rocker arm 310 and a magnet 320. The middle portion of the rocker arm 310 is hinged to the groove wall of the second mounting groove 120 via a pin 330. The proximal end 313 of the rocker arm 310 can cooperate with the end of the ejector pin 210 of the first engaging assembly 200. A locking portion 312 extends from the distal end 311 of the rocker arm 310. The magnet 320 is fixedly arranged near the proximal end 313 of the rocker arm 310 and is pre-embedded in the triangular demonstration board 100. The magnet 320 is located on the side away from the opening of the second mounting groove 120 relative to the proximal end 313 of the rocker arm 310. A torsion spring (not shown in the figure) is mounted on the pin 330. One end of the torsion spring is fixed to the groove wall of the second mounting groove 120, and the other end of the torsion spring is fixed to the rocker arm 310. The torsion spring acts to cause the proximal end 313 of the rocker arm 310 to swing toward the opening of the second mounting groove 120.

[0037] After the adjacent triangular demonstration plates 100 are combined and matched, the ejector pin 210 of the first engaging component 200 of one triangular demonstration plate 100 is first extended into the second mounting groove 120 under the action of the magnet 320 of the second engaging component 300 of the other triangular demonstration plate 100. The ejector pin 210 overcomes the elastic force of the return spring 220 of the first engaging component 200 and drives the proximal end 313 of the swing rod 310 of the second engaging component 300 of the other triangular demonstration plate 100 to swing. The engaging portion 312 of the distal end 311 of the swing rod 310 swings along the pin shaft 330 and then extends out of the second mounting groove 120 and matches with the second blocking portion 131 of the engaging notch 130 of the adjacent triangular demonstration plate 100.

[0038] In actual use, teachers can select appropriate triangle demonstration boards 100 according to the teaching content and guide students to assemble and operate them. Students can intuitively see the calculation process of the triangle area by operating it by themselves, and deepen their understanding of the triangle area calculation formula.

[0039] Teachers can also adjust and improve the teaching aids based on teaching needs. For example, the number and shape of the triangular demonstration boards 100 can be gradually increased based on students' mastery to increase the challenge and engagement. Furthermore, teachers can encourage students to design their own triangular demonstration boards 100 to cultivate their creativity and practical skills.

[0040] In short, the triangle area demonstration teaching aid of the present invention is a teaching aid with strong practicality and good teaching effect. It can help students better understand and master the calculation method of triangle area and improve the quality and effect of mathematics teaching.

[0041] The above is only one embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the principles of the present invention, and these should also be regarded as falling within the scope of protection of the present invention.

Claims

1. A teaching aid for demonstrating the area of a triangle, characterized by: The invention comprises a plurality of triangular demonstration boards (100), wherein two triangular demonstration boards (100) can be combined into a parallelogram on the same plane, and at least one side wall of the triangular demonstration board (100) is provided with a first installation groove (110), a second installation groove (120) and a locking notch (130), a first blocking ring (111) extending inwardly from the edge of the first installation groove (110) near the opening, and a second blocking portion (131) extending inwardly from the edge of the locking notch (130) near the opening; A first engaging assembly (200) is installed in the first mounting groove (110), and the first engaging assembly (200) includes a ejector pin (210) and a return spring (220). The axial length of the ejector pin (210) is less than the depth of the first mounting groove (110), and a side wall of the ejector pin (210) away from the opening of the first mounting groove (110) is provided with an annular protrusion (211). The return spring (220) is sleeved on the outside of the ejector pin (210), one end of the return spring (220) abuts against the annular protrusion (211) of the ejector pin (210), and the other end of the return spring (220) abuts against the first blocking ring (111) of the first mounting groove (110). The ejector pin (210) can overcome the elastic force of the return spring (220) and extend out of the outside of the first mounting groove (110); A second engaging assembly (300) is installed in the second installation groove (120), and the second engaging assembly (300) includes a swing rod (310) and a magnet (320). The middle portion of the swing rod (310) is hinged to the groove wall of the second installation groove (120). The proximal end (313) of the swing rod (310) can be matched with the end of the ejector pin (210) of the first engaging assembly (200). A locking portion (312) extends from the distal end (311) of the swing rod (310). The magnet (320) is fixedly arranged near the proximal end (313) of the swing rod (310), and the magnet (320) is located on a side away from the opening of the second installation groove (120) relative to the proximal end (313) of the swing rod (310). After the adjacent triangular demonstration plates (100) are combined and matched, the ejector pin (210) of the first engaging assembly (200) of one triangular demonstration plate (100) first extends into the second installation groove (120) under the action of the magnet (320) of the second engaging assembly (300) of the other triangular demonstration plate (100), and the ejector pin (210) overcomes the elastic force of the return spring (220) of the first engaging assembly (200) and drives the proximal end (313) of the second engaging assembly (300) of the other triangular demonstration plate (100) to swing, and the engaging portion (312) of the distal end (311) of the swing rod (310) extends out of the second installation groove (120) and matches with the second blocking portion (131) of the engaging notch (130) of the adjacent triangular demonstration plate (100).

2. The triangle area demonstration teaching aid according to claim 1, characterized in that: The middle portion of the swing rod (310) of the second engaging assembly (300) is hinged to the groove wall of the second installation groove (120) via a pin shaft (330).

3. The triangle area demonstration teaching aid according to claim 2, characterized in that: A torsion spring is sleeved on the pin shaft (330), one end of the torsion spring is fixed to the groove wall of the second installation groove (120), and the other end of the torsion spring is fixed to the rocker (310).

4. The triangle area demonstration teaching aid according to claim 1, characterized in that: The three side walls of the triangular demonstration board (100) are respectively provided with a first installation slot (110), a second installation slot (120) and a locking slot (130).

5. The triangle area demonstration teaching aid according to claim 1, characterized in that: The magnet (320) is pre-buried inside the triangular demonstration board (100).

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