Mathematical function display teaching aid

Abstract

The invention provides a mathematical function display teaching aid, and relates to the field of teaching props, the mathematical function display teaching aid comprises a base rod and a rectangular frame, the base rod is L-shaped, the upper end of the base rod is bent to be connected with the rectangular frame, the upper end of the base rod is located at the axis of the rectangular frame, the upper end of the base rod is connected with a center shaft needle, and the center shaft needle penetrates through the center of the rectangular frame. Four square plates are embedded in the front face of the rectangular frame, and a graduated scale is arranged between every two adjacent first thin rods. The mathematical function display teaching aid is composed of a rectangular frame, a square plate, a plurality of thin rods, a plurality of turntables, a center shaft needle and a connecting rod, a trigonometric function image is formed through the thin rods and the connecting rod, the included angle between the thin rods can be changed through the turntables, different function diagrams can be made conveniently, and the application range is widened. Adjustment is faster, and the situation that time is wasted and the teaching progress is affected is avoided. The small bulbs, the white light-transmitting plate and the magnetic powder are arranged in the hollow square plate for cooperation, so that the recognition degree of the thin rod is improved, and students in the distance in the back row can see clearly.

Description

Technical Field

[0001] The present invention relates to the technical field of teaching props, in particular to a mathematical function display teaching prop. Background Art

[0002] Trigonometric functions are a crucial subject. Because their concepts are relatively abstract, teachers often use protractors and rulers to illustrate them. However, these methods are inefficient, requiring teachers to draw diagrams on the blackboard and explain them. This makes them difficult for students to understand and remember. This is why teaching aids for function instruction were developed.

[0003] The function demonstration teaching aids in the prior art require teachers to adjust the teaching aids when drawing. However, the adjustment steps of the existing teaching aids are complicated, which affects the teaching progress and wastes class time. The teaching aids are not easy to see clearly when the light in the classroom is dim. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a mathematical function display teaching aid, which solves the problems raised in the above background technology.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a mathematical function display teaching aid, including a base rod and a rectangular frame, the base rod is L-shaped, the upper end of the base rod is bent and connected to the rectangular frame, the upper end of the base rod is at the axis of the rectangular frame, the upper end of the base rod is connected to a central axis needle, the central axis needle passes through the center of the rectangular frame, four square plates are inlaid on the front of the rectangular frame, and a scale is provided between two adjacent thin rods.

[0008] It also includes a thin rod 1, a thin rod 2, and a thin rod 3. The front ends of the thin rod 1, the thin rod 2, and the thin rod 3 are all hinged to the central axis needle rod body.

[0009] It also includes a small turntable, a middle turntable and a large turntable, which are arranged in order from small to large. The small turntable, the middle turntable and the large turntable are arranged in concentric circles, and the upper end of the base rod passes through the center of the three turntables.

[0010] The square plate is used as a quadrant area in the function image, the scale is used as a coordinate axis in the function image, and the center axis needle is located at the origin of the coordinate axis in the function image.

[0011] The ends of the thin rods are connected with positioning cylinders. The positioning cylinder on the first thin rod is connected to the small turntable, the positioning cylinder on the second thin rod is connected to the middle turntable, and the positioning cylinder on the third thin rod is connected to the large turntable.

[0012] The edge of the small turntable is provided with a plurality of embedding grooves around the center, and the angle between two adjacent embedding grooves is 15 degrees. The edge of the middle turntable is provided with a hole 1, and the edge of the large turntable is provided with a hole 2. The hole 1 and the hole 2 correspond to the embedding grooves one by one.

[0013] The bottom of the rectangular frame is connected with supporting feet.

[0014] Preferably, a magnetic core is embedded in the thin rod, the interior of the square plate is hollow, a white light-transmitting plate is provided in the square plate, the edge of the white light-transmitting plate slides with the inner wall of the square plate, a lever is connected to the back of the white light-transmitting plate, the lever passes through the square plate and the rectangular frame, and extends to the back of the rectangular frame, a small light bulb is connected to the inner wall of the square plate and located on the back of the white light-transmitting plate.

[0015] A layer of magnetic powder is laid on the front of the white light-transmitting plate.

[0016] Preferably, a connecting rod is also included, which is arranged between two adjacent thin rods. A magnetic core is also embedded in the connecting rod, and a thread is provided on the surface of the connecting rod. There are cylindrical rings slidingly fitted on the upper and lower sides of the connecting rod body, and the cylindrical rings are used to connect with the thin rods.

[0017] Preferably, the cylindrical ring is provided with a sliding hole along the length direction, the thin rod passes through the sliding hole, the side of the cylindrical ring is symmetrically connected with a hoop, the connecting rod passes through the hoop, and the connecting rod body is threadedly connected with small nuts on the upper and lower sides of the hoop.

[0018] Preferably, the base rod consists of a transverse part and a longitudinal part, the transverse part is arranged above the longitudinal part, the front end of the transverse part is connected to the center of the rectangular frame, the front end of the transverse part is connected to the central axis needle, and the transverse part passes through the center of the small turntable, the middle turntable and the large turntable.

[0019] Preferably, the lever body is sleeved with a spring, one end of the spring is in contact with the rectangular frame, and the other end of the spring is connected to the end of the lever away from the white light-transmitting plate.

[0020] Preferably, a through hole is provided at the end of the positioning tube, and a thin rod passes through the through hole. A chamber is provided in the positioning tube, and a plug is slidably fitted in the chamber. The front end of the plug extends to the outside of the positioning tube, and a through groove connected to the chamber is provided on the side of the positioning tube. An extension section is provided at the end of the plug, and the extension section extends to the outside of the positioning tube with the help of a channel. A magnet ring is provided on the outside of the front end of the positioning tube.

[0021] Preferably, the front end of the plug post can be inserted into the holes of the middle turntable and the large turntable, the inner wall of the embedding groove is provided with iron sheet, and the magnet ring is embedded in the embedding groove and attracted to the iron sheet.

[0022] (3) Beneficial effects

[0023] The present invention provides a mathematical function demonstration teaching aid having the following beneficial effects:

[0024] This mathematical function display aid consists of a rectangular frame, a square plate, multiple thin rods, multiple turntables, a central needle, and connecting rods. The rods and connecting rods form trigonometric function graphs. By rotating the rods, the angle between them can be changed, facilitating the creation of different function graphs and expanding its applicability. Adjustments are quicker, avoiding wasted time and disrupting the lesson. A small light bulb, a white translucent plate, and magnetic powder are incorporated into the hollow square plate to enhance the rod's visibility, making it easier for students in the back row to see. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional diagram showing the structure of the present invention;

[0026] Figure 2 It is a front view of the structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the present invention from another angle;

[0028] Figure 4 For the present invention Figure 1 A magnified view of the structure at center A;

[0029] Figure 5 It is a three-dimensional diagram of the local structure of the present invention;

[0030] Figure 6 For the present invention Figure 5 A magnified view of the structure at point B in the middle;

[0031] Figure 7 This is a cross-sectional view of the positioning tube structure of the present invention;

[0032] Figure 8 This is a cross-sectional view of the square plate structure of the present invention.

[0033] In the figure: 1 base rod, 2 center axis needle, 3 square plate, 31 white light-transmitting plate, 32 shift lever, 33 spring, 34 small light bulb, 35 magnetic powder, 4 thin rod 1, 5 thin rod 2, 6 thin rod 3, 7 connecting rod, 8 cylinder ring, 81 hoop, 9 small turntable, 91 embedded groove, 10 middle turntable, 101 hole 1, 11 large turntable, 111 hole 2, 12 positioning cylinder, 121 through hole, 13 supporting foot, 14 plug column, 141 extension section, 15 scale, 16 rectangular frame, 17 magnetic ring. DETAILED DESCRIPTION

[0034] The embodiment of the present invention provides a mathematical function display teaching aid, such as Figure 1-7As shown, it includes a base rod 1 and a rectangular frame 16. The base rod 1 is L-shaped. The upper end of the base rod 1 is bent and fixed to the rectangular frame 16. The upper end of the base rod 1 is at the axis of the rectangular frame 16. A central axis needle 2 is welded to the upper end of the base rod 1. The central axis needle 2 passes through the center of the rectangular frame 16. Four square plates 3 are inlaid on the front of the rectangular frame 16. A plastic scale 15 is fixedly installed between two adjacent thin rods 4.

[0035] It also includes a thin rod 1 4, a thin rod 2 5, and a thin rod 3 6. The front ends of the thin rod 1 4, the thin rod 2 5, and the thin rod 3 6 are all hinged to the rod body of the central axis needle 2.

[0036] Also include a small turntable 9, a middle turntable 10, and a large turntable 11. The small turntable 9, the middle turntable 10, and the large turntable 11 are arranged in order from small to large, and the small turntable 9, the middle turntable 10, and the large turntable 11 are arranged in concentric circles, and the upper end of the base rod 1 passes through the center of the three turntables.

[0037] The square plate 3 is used as a quadrant area in the function image, the scale 15 is used as a coordinate axis in the function image, and the center axis needle 2 is located at the origin of the coordinate axis in the function image.

[0038] A positioning cylinder 12 is placed at the end of the thin rod body. The positioning cylinder 12 on the thin rod 1 4 is fixed to the small turntable 9, the positioning cylinder 12 on the thin rod 2 5 is fixed to the middle turntable 10, and the positioning cylinder 12 on the thin rod 3 6 is fixed to the large turntable 11.

[0039] A plurality of embedding grooves 91 are provided around the center of the small turntable 9, and the angle between two adjacent embedding grooves 91 is 15°. A hole 101 is provided at the edge of the middle turntable 10, and a hole 2 111 is provided at the edge of the large turntable 11. Hole 101 and hole 2 111 correspond to the embedding grooves 91 one by one.

[0040] A supporting foot 13 is fixedly mounted on the bottom of the rectangular frame 16 .

[0041] The thin rod is embedded with a magnetic core. The square plate 3 is a white plastic plate. The square plate 3 is hollow and contains a white translucent plate 31. The edge of the white translucent plate 31 slides against the inner wall of the square plate 3. A lever 32 is welded to the back of the white translucent plate 31. The lever 32 passes through the square plate 3 and the rectangular frame 16 and extends to the rear of the rectangular frame 16. A small light bulb 34 is fixedly mounted on the inner wall of the square plate 3 and behind the white translucent plate 31.

[0042] A layer of magnetic powder 35 is laid on the front surface of the white light-transmitting plate 31 .

[0043] It also includes a connecting rod 7, which is arranged between two adjacent thin rods. A magnetic core is also embedded in the connecting rod 7. The surface of the connecting rod 7 is provided with a thread. The upper and lower sides of the connecting rod 7 are slidably fitted with a tube ring 8, which is used to connect with the thin rods.

[0044] The cylindrical ring 8 has a sliding hole along its length, through which the thin rod passes. A hoop 81 is symmetrically hinged on the side of the cylindrical ring 8, through which the connecting rod 7 passes. The connecting rod 7 has a small nut threaded on both sides of the hoop 81.

[0045] Working Principle: The device is first positioned horizontally. The user maneuvers two adjacent thin rods to a desired position, inserts the ring 8 onto the rods, and then inserts the positioning tube 12 onto the ends of the rods, connecting them to the corresponding turntables. Connecting rod 7 is then secured to the rings 8 on the two rods, forming a trigonometric function image. The user then presses the lever 32, moving the white light-transmitting plate 31 closer to the rods. The magnetic powder is attracted by the magnet core inside the rods and adheres to the inner wall of the square plate 3. The user then turns on the small light bulb 34, causing white light to shine through the square plate 3.

[0046] Then, the device is slowly straightened. The magnetic powder 35 is affected by the magnetic force and forms a long strip-shaped track inside the square plate 3. The track is in the same direction as the thin rod, blocking the light and forming a shadow area, thereby visually thickening the thin rod and making it easier for students sitting in the back row to see clearly.

[0047] When not in use, remove the positioning cylinder 12 and the connecting rod 7, and let the thin rod droop naturally and be parallel to the bottom plastic scale. Then gently tap the rectangular frame 16 to shake off the adsorbed magnetic powder.

[0048] A switch and a battery for controlling the operation of the small light bulb 34 are also fixedly mounted outside the rectangular frame 16 .

[0049] The base rod 1 consists of a transverse part and a longitudinal part. The transverse part is arranged above the longitudinal part. The front end of the transverse part is welded to the center of the rectangular frame 16, and the front end of the transverse part is welded to the central axis needle 2. The transverse part passes through the center of the small turntable 9, the middle turntable 10, and the large turntable 11.

[0050] The lever 32 is sleeved with a spring 33 , one end of the spring 33 is in contact with the rectangular frame 16 , and the other end of the spring 33 is welded to the end of the lever 32 away from the white light-transmitting plate 31 .

[0051] A through hole 121 is provided at the end of the positioning cylinder 12, and a thin rod passes through the through hole 121. A chamber is provided in the positioning cylinder 12, and a column 14 is slidably fitted in the chamber. The front end of the column 14 extends to the outside of the positioning cylinder 12, and a through groove connected to the chamber is provided on the side of the positioning cylinder 12. An extension section 141 is welded at the end of the column 14, and the extension section 141 extends to the outside of the positioning cylinder 12 with the help of the channel. A magnet ring 17 is fixedly installed on the outside of the front end of the positioning cylinder 12.

[0052] The front end of the plug post 14 can be inserted into the holes of the middle turntable 10 and the large turntable 11. The inner wall of the embedding groove 91 is provided with iron sheet, and the magnet ring 17 is embedded in the embedding groove 91 and attracted to the iron sheet.

[0053] In summary, this mathematical function display aid consists of a rectangular frame, a square plate, multiple thin rods, multiple turntables, a central axis needle, and connecting rods. The thin rods and connecting rods form trigonometric function graphs. By rotating the thin rods, the angle between them can be changed, facilitating the creation of different function graphs and expanding its applicability. Adjustment is quicker, avoiding wasted time and disrupting the teaching process. A small light bulb, a white translucent plate, and magnetic powder are incorporated into the hollow square plate to enhance the identification of the thin rods, making them easier for students in the back row to see.

[0054] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A mathematical function demonstration teaching aid, characterized by: The invention comprises a base rod (1) and a rectangular frame (16), wherein the base rod (1) is L-shaped, the upper end of the base rod (1) is bent and connected to the rectangular frame (16), the upper end of the base rod (1) is located at the axis of the rectangular frame (16), the upper end of the base rod (1) is connected to a central axis needle (2), the central axis needle (2) passes through the center of the rectangular frame (16), four square plates (3) are inlaid on the front of the rectangular frame (16), and a scale (15) is provided between two adjacent thin rods (4); It also includes a thin rod (4), a thin rod (5), and a thin rod (6), the front ends of which are hinged to the shaft of the central axis needle (2); It also includes a small turntable (9), a middle turntable (10), and a large turntable (11), wherein the small turntable (9), the middle turntable (10), and the large turntable (11) are arranged in order from small to large, and the small turntable (9), the middle turntable (10), and the large turntable (11) are arranged in concentric circles, and the upper end of the base rod (1) passes through the centers of the three turntables; The square plate (3) is used as a quadrant area in the function image, the scale (15) is used as a coordinate axis in the function image, and the center axis needle (2) is located at the origin of the coordinate axis in the function image; The ends of the thin rods are connected with positioning cylinders (12), the positioning cylinder (12) on the thin rod one (4) is connected to the small turntable (9), the positioning cylinder (12) on the thin rod two (5) is connected to the middle turntable (10), and the positioning cylinder (12) on the thin rod three (6) is connected to the large turntable (11); The edge of the small turntable (9) is provided with a plurality of embedding grooves (91) around the center, and the angle between two adjacent embedding grooves (91) is 15 degrees. The edge of the middle turntable (10) is provided with a hole 1 (101), and the edge of the large turntable (11) is provided with a hole 2 (111), and the hole 1 (101) and the hole 2 (111) correspond to the embedding grooves (91) one by one. The bottom of the rectangular frame (16) is connected to a supporting foot (13).

2. A mathematical function demonstration teaching aid according to claim 1, characterized in that: A magnetic core is embedded in the thin rod, the interior of the square plate (3) is hollow, a white light-transmitting plate (31) is provided in the square plate (3), the edge of the white light-transmitting plate (31) is slidably matched with the inner wall of the square plate (3), a lever (32) is connected to the back of the white light-transmitting plate (31), the lever (32) passes through the square plate (3) and the rectangular frame (16), and extends to the rear of the rectangular frame (16), and a small light bulb (34) is connected to the inner wall of the square plate (3) and located on the back of the white light-transmitting plate (31); A layer of magnetic powder (35) is laid on the front surface of the white light-transmitting plate (31).

3. A mathematical function demonstration teaching aid according to claim 2, characterized in that: The invention also includes a connecting rod (7), which is arranged between two adjacent thin rods. A magnetic core is also embedded in the connecting rod (7). The surface of the connecting rod (7) is provided with a thread. The upper and lower sides of the connecting rod (7) are slidably matched with a cylindrical ring (8), and the cylindrical ring (8) is used to connect with the thin rod.

4. A mathematical function demonstration teaching aid according to claim 3, characterized in that: The cylindrical ring (8) is provided with a sliding hole along the length direction, and the thin rod passes through the sliding hole. The side of the cylindrical ring (8) is symmetrically connected with a hoop (81), and the connecting rod (7) passes through the hoop (81). The connecting rod (7) is threadedly connected with small nuts on both the upper and lower sides of the hoop (81).

5. A mathematical function demonstration teaching aid according to claim 4, characterized in that: The base rod (1) consists of a transverse portion and a longitudinal portion. The transverse portion is arranged above the longitudinal portion. The front end of the transverse portion is connected to the center of the rectangular frame (16). The front end of the transverse portion is connected to the central axis needle (2). The transverse portion passes through the center of the small turntable (9), the middle turntable (10), and the large turntable (11).

6. A mathematical function demonstration teaching aid according to claim 5, characterized in that: The rod body of the shifting rod (32) is sleeved with a spring (33), one end of the spring (33) is in contact with the rectangular frame (16), and the other end of the spring (33) is connected to the end of the shifting rod (32) away from the white light-transmitting plate (31).

7. A mathematical function demonstration teaching aid according to claim 6, characterized in that: The positioning tube (12) has a through hole (121) at the end thereof, through which the thin rod passes, a chamber is provided in the positioning tube (12), a plug post (14) is slidably fitted in the chamber, a front end of the plug post (14) extends to the outside of the positioning tube (12), a through groove communicating with the chamber is provided on the side of the positioning tube (12), an extension section (141) is provided at the end of the plug post (14), the extension section (141) extends to the outside of the positioning tube (12) via a channel, and a magnet ring (17) is sleeved on the outer side of the front end of the positioning tube (12).

8. A mathematical function demonstration teaching aid according to claim 7, characterized in that: The front end of the plug post (14) can be inserted into the holes of the middle turntable (10) and the large turntable (11); the inner wall of the embedding groove (91) is provided with iron sheet; the magnet ring (17) is embedded in the embedding groove (91) and attracted to the iron sheet.

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