Multifunctional drawing tool for teaching

Abstract

The multifunctional drawing tool for teaching comprises a main rod, a knob bolt, an auxiliary rod and an angle ruler, the knob bolt is rotationally installed at the right end of the front side of the main rod, the auxiliary rod is rotationally installed on the rear side of the main rod through the knob bolt, the length of the main rod is larger than that of the auxiliary rod, and the angle ruler is installed on the front side of the main rod in a sliding mode. An adjusting groove is formed in the front side of the main rod, an adjusting block is slidably installed in the adjusting groove, the bevel protractor is detachably installed on the adjusting block, a magnet is fixedly installed on the front side of the adjusting block, an iron plate is magnetically connected to the front side of the magnet, and the bevel protractor is fixedly installed on the top of the iron plate. The multifunctional drawing tool is reasonable in design, lines of various angles can be conveniently drawn, the auxiliary rod is stored through the sleeve, occupied space is reduced, storage and carrying are convenient, the stretching length of the telescopic rod can be adjusted and fixed through the adjusting bolt, circles of various diameters can be further drawn, and the application range of the tool is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of drawing tools, in particular to a multifunctional drawing tool for teaching. Background Art

[0002] Drawing tools are generally compasses and rulers. Compass and ruler construction is a mathematical subject originated from ancient Greece. Only compasses and rulers are used, and they are only allowed to be used a limited number of times to solve different plane geometry construction problems. In mathematics and drawing, compasses are tools used to draw circles or chords. Rulers are also called rulers. They have precise straight edges and are used to measure lengths and draw. When existing mathematical multi-purpose drawing tools are used on iron blackboards, since tools such as compasses and rulers are all single and independent, tools need to be replaced when drawing, which causes a certain degree of inconvenience to users. In addition, the structure of drawing tools is relatively simple, making it difficult to achieve the effect of multi-functional drawing.

[0003] In response to the above problem, a Chinese patent announcement with announcement number CN211808720U discloses a multifunctional drawing tool for mathematics teaching, the technical key points of which are: comprising a drawing frame, the inner side wall of the drawing frame is fixedly connected with a support plate, and the middle part of the upper surface of the support plate is fixedly inlaid with a bearing. The multifunctional drawing tool for mathematics teaching can effectively fix the compass structure through the setting of the support plate, and can effectively press the push rod through the setting of the cross plate, the concave groove, the first anti-slip plate, the telescopic spring, the second anti-slip plate and the push rod, so that the first anti-slip plate and the second anti-slip plate slide in the concave groove, so that the diameter of the compass structure can be freely adjusted, and can effectively draw according to the scale value through the setting of the first connecting block, the pointer, the concave plate and the brush.

[0004] In actual operation, the above scheme is found to still have at least the following defects: the drawing tool is not convenient for drawing oblique lines of various angles and has a small scope of application. Therefore, we propose a multifunctional drawing tool for teaching to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies of the prior art, the utility model provides a multifunctional drawing tool for teaching, which solves the problem that the tool is inconvenient to draw oblique lines of various angles and has a small application range.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multifunctional drawing tool for teaching, comprising a main rod, a knob bolt, a sub-rod and an angle ruler, the knob bolt is rotatably installed on the front right end of the main rod, the sub-rod is rotatably installed on the rear side of the main rod through the knob bolt, the length of the main rod is greater than the length of the sub-rod, and the angle ruler is slidably installed on the front side of the main rod.

[0009] Preferably, an adjustment slot is provided on the front side of the main rod, an adjustment block is slidably installed in the adjustment slot, and the angle ruler is detachably installed on the adjustment block.

[0010] Preferably, a magnet is fixedly mounted on the front side of the adjustment block, an iron plate is magnetically connected to the front side of the magnet, and the angle ruler is fixedly mounted on the top of the iron plate.

[0011] Preferably, a cushion block is fixedly installed on the rear side of the main rod, the thickness of the cushion block is consistent with the thickness of the auxiliary rod, a sleeve is slidably provided on the main rod, and the left end of the auxiliary rod is slidably installed in the sleeve.

[0012] Preferably, a limiting groove is provided on the front side of the main rod and is located on the left side of the adjusting groove. A limiting block is slidably installed in the limiting groove, and the limiting block is fixedly installed on the front inner wall of the sleeve.

[0013] Preferably, a through slot is provided at the left end of the auxiliary rod, a connecting shaft is fixedly installed in the through slot, a telescopic tube is rotatably installed on the connecting shaft, a telescopic rod is slidably installed in the telescopic tube, the bottom end of the telescopic rod extends to the outside of the telescopic tube and is fixedly installed with a conical sleeve, an adjusting bolt is threadedly installed on the rear side of the telescopic tube, and the front end of the adjusting bolt is in close contact with the telescopic rod.

[0014] Preferably, the main rod, the auxiliary rod and the telescopic rod are all provided with scale lines, and the angle ruler is made of a transparent material.

[0015] (III) Beneficial effects

[0016] The utility model provides a multifunctional drawing tool for teaching, which has the following beneficial effects:

[0017] (1) This multifunctional drawing tool for teaching can conveniently draw lines at various angles by utilizing the combined effect of the main rod, the knob bolt, the auxiliary rod and the angle ruler, thereby improving the scope of application of the tool. The auxiliary rod can be stored in a sleeve to reduce the occupied space and facilitate storage and carrying.

[0018] (2) This multifunctional drawing tool for teaching can conveniently draw circles of various diameters by utilizing the combined effects of the through slot, the connecting shaft, the telescopic tube, the telescopic rod, the tapered sleeve, and the adjusting bolt, thereby further improving the scope of application of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the main view of the utility model;

[0021] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0022] Figure 4 for Figure 2 A magnified schematic diagram of part B;

[0023] Figure 5 The three-dimensional structure of the utility model is shown in FIG. Figure 2 .

[0024] In the figure: 1. main rod; 2. knob bolt; 3. auxiliary rod; 4. angle ruler; 5. adjustment slot; 6. adjustment block; 7. magnet; 8. iron plate; 9. spacer block; 10. sleeve; 11. limit slot; 12. limit block; 13. through slot; 14. connecting shaft; 15. telescopic tube; 16. telescopic rod; 17. tapered sleeve; 18. adjustment bolt; 19. scale line. DETAILED DESCRIPTION

[0025] 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.

[0026] like Figure 1-5 As shown, the utility model provides a technical solution: a multifunctional drawing tool for teaching, comprising a main rod 1, a knob bolt 2, a sub-rod 3 and an angle ruler 4, the knob bolt 2 is rotatably installed on the front right end of the main rod 1, the sub-rod 3 is rotatably installed on the rear side of the main rod 1 through the knob bolt 2, the length of the main rod 1 is greater than the length of the sub-rod 3, and the angle ruler 4 is slidably installed on the front side of the main rod 1.

[0027] In this embodiment, an adjustment groove 5 is opened on the front side of the main rod 1, and an adjustment block 6 is slidably installed in the adjustment groove 5. The angle ruler 4 is detachably installed on the adjustment block 6. By utilizing the adjustment groove 5 and the adjustment block 6, the position of the angle ruler 4 can be conveniently moved and adjusted. A magnet 7 is fixedly installed on the front side of the adjustment block 6, and an iron plate 8 is magnetically connected to the front side of the magnet 7. The angle ruler 4 is fixedly installed on the top of the iron plate 8. By utilizing the combined action of the magnet 7 and the iron plate 8, the angle ruler 4 can be conveniently disassembled and installed, which is convenient for storing tools in a box.

[0028] In this embodiment, a through slot 13 is provided at the left end of the above-mentioned auxiliary rod 3, and a connecting shaft 14 is fixedly installed in the through slot 13. A telescopic tube 15 is rotatably installed on the connecting shaft 14, and a telescopic rod 16 is slidably installed in the telescopic tube 15. The bottom end of the telescopic rod 16 extends to the outside of the telescopic tube 15 and is fixedly installed with a conical sleeve 17. An adjusting bolt 18 is threadedly installed on the rear side of the telescopic tube 15, and the front end of the adjusting bolt 18 is in close contact with the telescopic rod 16. The extension length of the telescopic rod 16 can be adjusted and fixed by adjusting the bolt 18, thereby drawing circles of various diameters.

[0029] In this embodiment, a limit groove 11 is provided on the front side of the main rod 1 and is located on the left side of the adjustment groove 5. A limit block 12 is slidably installed in the limit groove 11. The limit block 12 is fixedly installed on the front inner wall of the sleeve 10. By utilizing the combined effect of the limit groove 11 and the limit block 12, the movement range of the sleeve 10 can be constrained and restricted. A pad block 9 is fixedly installed on the rear side of the main rod 1. The thickness of the pad block 9 is consistent with the thickness of the auxiliary rod 3. A sleeve 10 is slidably sleeved on the main rod 1. The left end of the auxiliary rod 3 is slidably installed in the sleeve 10. Scale lines 19 are provided on the main rod 1, the auxiliary rod 3 and the telescopic rod 16, and the angle ruler 4 is made of transparent material.

[0030] Through the above structure, the multifunctional drawing tool for teaching provided by the utility model can conveniently draw lines at various angles, and the auxiliary rod 3 can be stored through the sleeve 10, which reduces the occupied space and is convenient for storage and carrying. The extension length of the telescopic rod 16 can be adjusted and fixed by adjusting the bolt 18, so as to draw circles of various diameters, thereby improving the application range of the tool. In specific use, when it is necessary to draw an oblique line of a fixed angle, the sleeve 10 is controlled to slide to the left to release the fixation of the auxiliary rod 3, and the knob bolt is loosened. 2. Open the auxiliary rod 3 and control the angle ruler 4 to move to the right at the same time so that the center of the angle ruler 4 coincides with the intersection of the main rod 1 and the auxiliary rod 3. When the angle between the main rod 1 and the auxiliary rod 3 is the target angle, tighten the knob bolt 2 to fix the main rod 1 and the auxiliary rod 3 to facilitate the drawing of oblique lines. When it is necessary to draw a circle, loosen the adjusting bolt 18 and control the extension of the telescopic rod 16. When the scale on the telescopic rod 16 shows the target length, tighten the adjusting bolt 18, insert the chalk or other drawing pen into the conical sleeve 17, and rotate the telescopic rod 16 to draw a circle.

[0031] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope recorded in the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A multifunctional drawing tool for teaching, characterized in that: The invention comprises a main rod (1), a knob bolt (2), a secondary rod (3) and an angle ruler (4); the knob bolt (2) is rotatably mounted on the front right end of the main rod (1); the secondary rod (3) is rotatably mounted on the rear side of the main rod (1) through the knob bolt (2); the length of the main rod (1) is greater than the length of the secondary rod (3); the angle ruler (4) is slidably mounted on the front side of the main rod (1); an adjustment slot (5) is provided on the front side of the main rod (1); an adjustment block (6) is slidably mounted in the adjustment slot (5); and the angle ruler (4) is detachably mounted on the adjustment block (6).

2. A multifunctional drawing tool for teaching according to claim 1, characterized in that: A magnet (7) is fixedly mounted on the front side of the adjustment block (6), an iron plate (8) is magnetically connected to the front side of the magnet (7), and the angle ruler (4) is fixedly mounted on the top of the iron plate (8).

3. A multifunctional drawing tool for teaching according to claim 1, characterized in that: A cushion block (9) is fixedly installed on the rear side of the main rod (1), and the thickness of the cushion block (9) is consistent with the thickness of the auxiliary rod (3). A sleeve (10) is slidably sleeved on the main rod (1), and the left end of the auxiliary rod (3) is slidably installed in the sleeve (10). A limiting groove (11) located on the left side of the adjustment groove (5) is opened on the front side of the main rod (1), and a limiting block (12) is slidably installed in the limiting groove (11), and the limiting block (12) is fixedly installed on the front inner wall of the sleeve (10).

4. A multifunctional drawing tool for teaching according to claim 1, characterized in that: A through slot (13) is provided at the left end of the auxiliary rod (3), a connecting shaft (14) is fixedly installed in the through slot (13), a telescopic tube (15) is rotatably installed on the connecting shaft (14), a telescopic rod (16) is slidably installed in the telescopic tube (15), the bottom end of the telescopic rod (16) extends outside the telescopic tube (15) and is fixedly installed with a conical sleeve (17), an adjusting bolt (18) is threadedly installed on the rear side of the telescopic tube (15), and the front end of the adjusting bolt (18) is in close contact with the telescopic rod (16), the main rod (1), the auxiliary rod (3) and the telescopic rod (16) are all provided with scale marks (19), and the angle ruler (4) is made of transparent material.

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