Multifunctional mathematics teaching aid ruler

Abstract

The utility model relates to the technical field of math teaching aids, and discloses a multifunctional math teaching aid ruler, which comprises a ruler, a groove arranged on the ruler and a moving structure arranged in the groove in a sliding manner, the ruler is provided with scale marks which are oppositely arranged, the moving structure comprises a moving plate positioned in the groove, and the moving plate is arranged in the groove. Sliding blocks are fixedly connected to the two sides of the movable plate, sliding grooves matched with the sliding blocks are formed in the two sides of the groove in the ruler, limiting structures used for fixing the positions of the sliding blocks in the sliding grooves are arranged on the ruler, a positioning cavity matched with chalk is formed in the movable plate, a through groove is formed in one side of the positioning cavity in the movable plate, and the through groove is communicated with the through groove. A clamping block used for fixing the chalk in the positioning cavity is arranged in the through groove in a sliding mode, a rubber sleeve is arranged at one end of the ruler, and a centering needle capable of penetrating through the ruler is arranged in an inner cavity of the rubber sleeve. Compared with the prior art, the teaching aid has the advantages that circles and circles with certain diameters can be drawn conveniently, and teaching aids do not need to be used alternately.

Description

Technical Field

[0001] This utility model relates to the field of mathematical teaching aids technology, specifically to a multifunctional mathematical teaching aid ruler. Background Technology

[0002] In the process of teaching mathematics, mathematics teachers need to use teaching aids such as rulers and compasses to draw geometric figures on the blackboard in order to explain and teach with students. In actual use, rulers and compasses are two independent teaching aids, which can be used to measure lengths, draw straight lines, and draw circles on the blackboard, respectively. When it is necessary to draw a circle with a certain diameter, it is necessary to first draw the diameter with a ruler before using a compass to draw the circle according to the straight line indicating the diameter. Using two teaching aids separately is very inconvenient. Utility Model Content

[0003] (I) Technical problems to be solved

[0004] The technical problem this invention aims to solve is that in current mathematics teaching, when using rulers and compasses separately, especially when drawing circles of a certain diameter, it is necessary to alternate between rulers and compasses, which makes it inconvenient for mathematics teachers.

[0005] (II) Technical Solution

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a multifunctional mathematical teaching ruler, including a ruler with relatively arranged scale lines, a groove on the ruler and a movable structure slidably disposed in the groove, the movable structure including a movable plate located in the groove, sliders fixedly connected to both sides of the movable plate, grooves that cooperate with the sliders on both sides of the groove inside the ruler, a limiting structure for fixing the position of the sliders in the grooves on the ruler, a positioning cavity for cooperating with chalk inside the movable plate, a through groove on one side of the positioning cavity inside the movable plate, a clamp for fixing the chalk in the positioning cavity slidably disposed in the through groove, a rubber sleeve on the ruler, and a centering pin that can pass through the ruler in the inner cavity of the rubber sleeve.

[0007] As an improvement, the limiting structure includes a fixing stud and a positioning nut. The fixing stud is fixed to the upper end of the slider, and the positioning nut is threaded onto the fixing stud. The ruler has an elongated groove at the upper end of the groove that mates with the fixing stud.

[0008] As an improvement, a rotating rod is fixed to the positioning nut.

[0009] As an improvement, limit blocks are fixedly connected to both sides of the clamping block, and the moving plate is provided with limit grooves that cooperate with the limit blocks on both sides of the through groove. A guide rod that passes through the limit block is fixedly connected in one limit groove, and a screw rod that passes through the moving plate is rotatably provided in the limit groove on the other side. The limit block and the screw rod are threadedly connected.

[0010] As an improvement, a rotating block is fixed to one end of the screw, and the rotating block is provided with at least one anti-slip groove that is evenly arranged in a ring.

[0011] As an improvement, the concave surface of the clamping block is arc-shaped, and a clamping ring that mates with chalk is adhered to the inner wall of the positioning cavity.

[0012] As an improvement, the rubber sleeve has a thickened design at the top of the centering pin.

[0013] As an improvement, a pointer that mates with the scale lines is fixedly attached to the movable plate.

[0014] (III) Beneficial Effects

[0015] The advantages of this utility model compared with the prior art are as follows:

[0016] 1. A math teacher can use a ruler to draw straight lines on the blackboard. When a circle needs to be drawn, the chalk is held in the positioning cavity by a clamping block, and the center of the circle is positioned by a center pin. The teacher can then move the ruler around the blackboard to draw a circle.

[0017] 2. When you need to draw a circle of a certain diameter, adjust and fix the position of the moving structure, and repeat the above operation to draw a circle of a certain diameter without having to change the teaching aids. Attached Figure Description

[0018] Figure 1 This is a three-dimensional view of a multifunctional mathematical teaching aid ruler without a pointer, according to this utility model.

[0019] Figure 2 This is an enlarged view of section A of a multifunctional mathematical teaching aid ruler according to this utility model.

[0020] Figure 3 This utility model is a cross-sectional solid view of a multifunctional mathematical teaching aid ruler. Figure 1 .

[0021] Figure 4 This utility model is a cross-sectional solid view of a multifunctional mathematical teaching aid ruler. Figure 2 .

[0022] Figure 5 This is a cross-sectional perspective view of the movable structure of a multifunctional mathematical teaching aid ruler according to this utility model.

[0023] As shown in the figure: 1. Ruler; 2. Scale line; 3. Groove; 4. Rubber sleeve; 5. Centering pin; 6. Slide groove; 7. Moving structure; 8. Moving plate; 9. Slider; 10. Pointer; 11. Positioning cavity; 12. Clamping ring; 13. Through groove; 14. Clamping block; 15. Limiting groove; 16. Limiting block; 17. Guide rod; 18. Screw; 19. Rotating block; 20. Long groove; 21. Fixing stud; 22. Positioning nut; 23. Rotating rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a multifunctional mathematical teaching ruler includes a ruler 1 with scale lines 2 arranged opposite each other. It also includes a groove 3 on the ruler 1 and a sliding structure 7 slidably disposed within the groove 3. The sliding structure 7 includes a sliding plate 8 located within the groove 3. A pointer 10 cooperating with the scale lines 2 is fixedly connected to the sliding plate 8 for easy observation of the radius value of a circle. Slider 9s are fixedly connected to both sides of the sliding plate 8. The ruler 1 has sliding grooves 6 on both sides of the groove 3 that cooperate with the slider 9. The ruler 1 is provided with a limiting structure for fixing the position of the slider 9 in the slide groove 6. The limiting structure includes a fixing stud 21 and a positioning nut 22. The fixing stud 21 is fixedly connected to the upper end of the slider 9, and the positioning nut 22 is threadedly connected to the fixing stud 21. The ruler 1 has an elongated groove 20 at the upper end of the groove 3 that mates with the fixing stud 21. A rotating rod 23 is fixedly connected to the positioning nut 22. Rotating the rotating rod 23 facilitates rotating the positioning nut 22. When the positioning nut 22 is close to the ruler 1, it can fix the position of the slider 9 in the slide groove 6.

[0027] Using the above structure, the position of movable structure 7 can be adjusted to draw circles of different radii. The specific structure for clamping chalk and drawing circles is as follows:

[0028] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the movable plate 8 has a positioning cavity 11 that cooperates with the chalk. The movable plate 8 has a through groove 13 on one side of the positioning cavity 11. A clamping block 14 for fixing the chalk in the positioning cavity 11 is slidably provided in the through groove 13. Limiting blocks 16 are fixed to both sides of the clamping block 14. When the chalk is clamped, the pointer 10 and the scale line pointed to by the pointer 10 are on the same straight line as the center of the circle formed by the clamping block 14 and the positioning cavity 11.

[0029] The movable plate 8 has limiting grooves 15 on both sides of the through groove 13, which cooperate with the limiting block 16. A guide rod 17 that passes through the limiting block 16 is fixed in one limiting groove 15, and a screw 18 that passes through the movable plate is rotatably installed in the limiting groove 15 on the other side. The limiting block 16 and the screw 18 are threadedly connected. Rotating the screw 18 can drive the clamping block 14 to move and clamp the chalk. The concave surface of the clamping block 14 is arc-shaped. A clamping ring 12 that cooperates with the chalk is adhered to the inner wall of the positioning cavity 11. One end of the ruler 1 is provided with a rubber sleeve 4. The inner cavity of the rubber sleeve 4 is provided with a centering needle 5 that can pass through the ruler 1. The tip of the centering needle 5 is on the same straight line as the zero end of the scale line.

[0030] With the above structure, the clamp 14 can clamp the chalk, and the ruler 1 can be drawn by rotating the center pin 5.

[0031] Example 2

[0032] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, one end of the screw 18 is fixedly connected to a rotating block 19. The rotating block 19 is provided with at least one anti-slip groove that is evenly arranged in a ring to facilitate squeezing the rotating block 19. The rubber sleeve 4 has a thickened design at the top of the centering needle 5. The thickened design can improve the comfort of pressing the centering needle 5 with the hand.

[0033] With the above structure, rotating block 19 facilitates the rotation of screw 18.

[0034] In practical implementation, when a math teacher uses teaching aids to draw straight lines, the ruler can be placed against the blackboard. When drawing circles, the chalk is passed through the positioning cavity, and then the rotating block is turned. With the cooperation of the guide rod and the screw, the limiting blocks on both sides will slide in the limiting groove, thereby driving the clamping block to move in the direction of the chalk in the through groove until the clamping block is close to the surface of the chalk, thus clamping and fixing the chalk in the positioning cavity. Then, the rubber sleeve is pressed, and the centering pin is stuck on the blackboard. The ruler is rotated around the centering pin to drive the chalk to draw circles.

[0035] When drawing a circle of a certain diameter, specifically, slide the movable plate in the groove. The slider will slide in the groove, and the fixing stud will also move in the long groove. According to the coordination of the pointer and the scale line, the radius of the circle can be adjusted. After the movable structure is moved to the appropriate position, rotate the rotating rod and the positioning nut until the positioning nut is close to the surface of the ruler to fix the movable plate, thereby adjusting the radius of the circle, which can adjust the diameter. Then repeat the above operation to draw the circle. In this way, when drawing a circle of a certain diameter, there is no need to alternate the use of teaching aids.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0038] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A multifunctional mathematical teaching ruler, comprising a ruler (1), wherein the ruler (1) is provided with oppositely arranged scale lines (2), characterized in that: It also includes a groove (3) on the ruler (1) and a sliding structure (7) slidably disposed in the groove (3). The sliding structure (7) includes a sliding plate (8) located in the groove (3). Sliders (9) are fixedly connected to both sides of the sliding plate (8). The ruler (1) has a sliding groove (6) on both sides of the groove (3) that cooperates with the slider (9). The ruler (1) has a limiting structure for fixing the position of the slider (9) in the sliding groove (6). The movable plate (8) is provided with a positioning cavity (11) that cooperates with the chalk. The movable plate (8) is provided with a through groove (13) on one side of the positioning cavity (11). A clamp (14) for fixing the chalk in the positioning cavity (11) is slidably provided in the through groove (13). One end of the ruler (1) is provided with a rubber sleeve (4). The inner cavity of the rubber sleeve (4) is provided with a centering pin (5) that can pass through the ruler (1).

2. The multifunctional mathematical teaching aid ruler according to claim 1, characterized in that: The limiting structure includes a fixing stud (21) and a positioning nut (22). The fixing stud (21) is fixed to the upper end of the slider (9), and the positioning nut (22) is threaded onto the fixing stud (21). The ruler (1) has a long groove (20) at the upper end of the groove (3) that mates with the fixing stud (21).

3. The multifunctional mathematical teaching aid ruler according to claim 2, characterized in that: A rotating rod (23) is fixedly connected to the positioning nut (22).

4. The multifunctional mathematical teaching aid ruler according to claim 1, characterized in that: Both sides of the clamping block (14) are fixedly connected to limiting blocks (16). The moving plate (8) has limiting grooves (15) that cooperate with the limiting blocks (16) on both sides of the through groove (13). A guide rod (17) that penetrates the limiting block (16) is fixedly connected in one limiting groove (15). A screw rod (18) that penetrates the moving plate (8) is rotatably provided in the limiting groove (15) on the other side. The limiting block (16) and the screw rod (18) are threadedly connected.

5. A multifunctional mathematical teaching aid ruler according to claim 4, characterized in that: One end of the screw (18) is fixedly connected to a rotating block (19), and the rotating block (19) is provided with at least one anti-slip groove that is evenly arranged in a ring.

6. A multifunctional mathematical teaching aid ruler according to claim 4, characterized in that: The concave surface of the clamping block (14) is arc-shaped, and a clamping ring (12) that cooperates with the chalk is adhered to the inner wall of the positioning cavity (11).

7. A multifunctional mathematical teaching aid ruler according to claim 1, characterized in that: The top of the centering pin (5) on the rubber sleeve (4) is thickened.

8. A multifunctional mathematical teaching aid ruler according to claim 1, characterized in that: A pointer (10) that cooperates with the scale line (2) is fixedly connected to the moving plate (8).

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