Multifunctional ruler for mathematics teaching

Abstract

The utility model discloses a multifunctional ruler for mathematics teaching, which relates to the technical field of rulers and comprises a protractor composed of a protractor body and a hollow groove, a circular rotating groove penetrating through the straight end face of the protractor body is arranged on the inner side of the hollow groove, and a connecting ring block is fixed at the central position of the protractor body. The protractor body is connected with an angle drawing assembly through the circular rotating groove and the connecting ring block, and the angle drawing assembly is used for achieving angle line drawing operation. The angle drawing assembly comprises a knob, a convex connecting column and a rotating arm; a circle drawing assembly is further arranged on the rotating arm and used for achieving circle drawing operation. By arranging the angle drawing assembly and the circle drawing assembly, the angle of the protractor can be drawn more conveniently, meanwhile, the circle drawing function is added, the functions of the protractor are richer, and a good auxiliary effect is achieved for drawing operation in mathematics teaching.

Description

TECHNICAL FIELD

[0001] The utility model relates to ruler technology field, concretely is a multifunctional ruler for mathematics teaching. BACKGROUND

[0002] In the mathematics teaching process, when the teaching of geometry and other needs drawing, the teacher needs to use the ruler to copy drawing, and the ruler includes a triangle ruler, a ruler, and a protractor. Among them, the protractor can draw angles, measure angles, draw perpendicular lines, parallel lines, measure inclination, perpendicularity, and levelness.

[0003] When drawing an angle through the protractor, the operation is as follows: first, draw a horizontal line, place the origin of the protractor at one end of the straight line, and the point will become the vertex of the angle. Then find the degree of the angle to be drawn on the protractor and mark it on the paper. Use the flat edge of the ruler or the protractor to connect the vertex with the marked degree to draw the second side. In this process, the position of the protractor needs to be frequently converted. In addition, the traditional protractor cannot draw a circle. Therefore, in order to simplify the angle drawing step and increase the function of the protractor to draw a circle, a multifunctional ruler for mathematics teaching is provided. SUMMARY

[0004] The utility model aims at: in order to solve the problem in the above background, provide a multifunctional ruler for mathematics teaching.

[0005] To achieve the above object, the utility model provides the following technical scheme: a multifunctional ruler for mathematics teaching, comprising a protractor composed of a protractor body and a hollow groove, the hollow groove is arranged in the middle region of the protractor body, the inner side of the hollow groove is provided with a circular rotating groove penetrating the straight face end surface of the protractor body, a connecting ring block is fixed at the center position of the protractor body, and a drawing angle assembly is connected to the protractor body through the circular rotating groove and the connecting ring block, the drawing angle assembly is used for realizing angle line drawing operation.

[0006] The drawing angle assembly comprises a knob, a convex connecting column, and an arm.

[0007] The convex connecting column is fixed to the bottom of the knob, the knob is attached to the upper surface of the protractor body, and the convex connecting column is limited to rotate with the connecting ring block.

[0008] The arm is rotatably sleeved on the outside of the convex connecting column and extends to the inside of the circular rotating groove.

[0009] A group of angle scales are arranged on the upper surface of the protractor body near the outside of the protractor body and the inside of the hollow groove, and the angle scales near the inside of the hollow groove are used to represent the included angle between the arm and the straight end surface of the hollow groove. The straight end surface of the hollow groove and the straight end surface of the arm can provide guidance for angle line drawing.

[0010] The rotating arm is further provided with a circle drawing assembly for realizing circle drawing operation.

[0011] As a further scheme of the utility model: the circle drawing assembly comprises a straight slot, an I-shaped sliding block and a through hole.

[0012] The straight slot is arranged on the upper surface of the rotating arm and penetrates the lower surface of the rotating arm completely, the I-shaped sliding block is limitingly and slidingly connected to the inner side of the straight slot, and the through hole is arranged on the top of the I-shaped sliding block and penetrates the bottom of the through hole completely.

[0013] The chalk is inserted into the through hole, and the rotating arm and the protractor body are rotated as a whole with the knob as the center, so that the circle drawing operation on the blackboard is realized.

[0014] As a further scheme of the utility model: the circle drawing assembly further comprises a locking slot and an L-shaped elastic clamping block.

[0015] The locking slot is symmetrically arranged on the inner wall of the straight slot, the inner wall of the through hole is formed with a notch groove, the top of the L-shaped elastic clamping block is fixed to the inner wall top of the notch groove, and the bottom horizontal part of the L-shaped elastic clamping block faces the direction of the locking slot.

[0016] The chalk is inserted into the through hole and contacts and extrudes the L-shaped elastic clamping block, so that the bottom horizontal part of the L-shaped elastic clamping block is clamped into the inner side of the locking slot, and the relative fixation of the I-shaped sliding block and the rotating arm is realized.

[0017] As a further scheme of the utility model: a semicircular hole for the penetration of the convex connecting column is arranged at the center position of the lower surface of the protractor body, and a rubber layer is bonded to the lower surface of the convex connecting column and flush with the lower surface of the protractor body.

[0018] The rotating arm and the inner wall of the circular rotating groove have frictional resistance.

[0019] As a further scheme of the utility model: the through hole is matched with the maximum diameter of the chalk, the vertical part of the L-shaped elastic clamping block in the initial state is inclined towards the through hole, the horizontal part side is flush with the inner wall side of the straight slot, and the distance between the two vertical parts of the two L-shaped elastic clamping blocks in the initial state is smaller than the minimum diameter of the chalk.

[0020] Compared with the prior art, the utility model has the beneficial effects that:

[0021] By arranging the angle drawing assembly and the circle drawing assembly, the angle drawing of the protractor is more convenient, the circle drawing function is increased, the function of the protractor is more abundant, and good auxiliary effect is achieved on the drawing operation of mathematics teaching. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is another perspective structural schematic view of the utility model;

[0023] Figure 2 It is another perspective structural schematic view of the utility model;

[0024] Figure 3 It is the structure bottom view of angle drawing assembly split state of the utility model;

[0025] Figure 4 It is the structure sectional view of rotating arm and circle drawing assembly of the utility model.

[0026] In the figure: 1, protractor; 101, protractor body; 102, hollow groove; 103, circular rotating groove; 104, connecting ring block; 2, angle drawing assembly; 201, knob; 202, convex connecting column; 203, rotating arm; 3, circle drawing assembly; 301, straight slot; 302, locking clamping groove; 303, I-shaped sliding block; 304, through hole; 305, L-shaped elastic clamping block. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] Please refer to Figures 1-4 In the embodiments of the utility model, a multifunctional ruler for mathematics teaching includes a protractor 1 composed of a protractor body 101 and a hollow groove 102, the hollow groove 102 is arranged in the middle region of the protractor body 101, the inner side of the hollow groove 102 is provided with a circular rotating groove 103 penetrating the straight surface end face of the protractor body 101, the connecting ring block 104 is fixed at the center position of the protractor body 101, the protractor body 101 is connected with an angle drawing assembly 2 through the circular rotating groove 103 and the connecting ring block 104, and the angle drawing assembly 2 is used for realizing angle line drawing operation.

[0029] The angle drawing assembly 2 includes a knob 201, a convex connecting column 202 and a rotating arm 203.

[0030] The convex connecting column 202 is fixed to the bottom of the knob 201, the knob 201 is attached to the upper surface of the protractor body 101, and the convex connecting column 202 is rotationally limited with the connecting ring block 104.

[0031] The rotating arm 203 is rotationally sleeved outside the convex connecting column 202 and extends to the inside of the circular rotating groove 103.

[0032] The upper surface of the protractor body 101 is provided with a set of angle scale lines near the outer side of the protractor body 101 and the inner side of the hollow groove 102, and the angle scale lines near the inner side of the hollow groove 102 are used to indicate the included angle between the rotating arm 203 and the straight end surface of the hollow groove 102. The straight end surface of the hollow groove 102 and the straight end surface of the rotating arm 203 can provide guidance for angle drawing;

[0033] The rotating arm 203 is further provided with a circle drawing assembly 3, which is used to realize circle drawing operation;

[0034] The circle drawing assembly 3 includes a straight slot 301, a locking clamping groove 302, an I-shaped sliding block 303, a through hole 304, and an L-shaped elastic clamping block 305.

[0035] The straight slot 301 is opened on the upper surface of the rotating arm 203 and completely penetrates the lower surface of the rotating arm 203. The I-shaped sliding block 303 is limitingly and slidingly connected to the inner side of the straight slot 301. The through hole 304 is opened on the top of the I-shaped sliding block 303 and completely penetrates to the bottom of the through hole 304.

[0036] By inserting chalk into the through hole 304 and rotating the rotating arm 203 and the protractor body 101 as a whole around the knob 201, circle drawing operation on the blackboard can be realized.

[0037] The locking clamping groove 302 is symmetrically opened on the inner wall of the straight slot 301. The inner wall of the through hole 304 is formed with a notch groove. The top of the L-shaped elastic clamping block 305 is fixed to the top of the inner wall of the notch groove. The bottom transverse part of the L-shaped elastic clamping block 305 faces the direction of the locking clamping groove 302.

[0038] By inserting chalk into the through hole 304 and contacting and extruding the L-shaped elastic clamping block 305, the bottom transverse part of the L-shaped elastic clamping block 305 is clamped into the inner side of the locking clamping groove 302, so as to realize the relative fixation of the I-shaped sliding block 303 and the rotating arm 203.

[0039] In this embodiment, the protractor 1 has the functions of quickly drawing an angle and a circle in addition to the conventional functions when in use. The operation steps are as follows:

[0040] When an angle needs to be drawn, the rotating arm 203 is manually rotated around the convex connecting column 202 along the circular rotating groove 103 track. By the angle scale lines near the inner side of the hollow groove 102, the angle between the rotating arm 203 and the straight end surface of the hollow groove 102 can be quickly judged. When the rotating arm 203 is rotated to the required angle, the protractor 1 is attached to the blackboard. Then the hand is pressed on the rotating arm 203 or the protractor body 101, and the chalk is drawn along the straight end surface of the hollow groove 102 and the side of the rotating arm 203, respectively. The two lines intersect to form the required angle.

[0041] When drawing a circle, first move the I-shaped slider 303 along the straight slot 301 track, the upper surface of the rotating arm 203 is provided with a length scale line for identifying the distance from the center of the convex connecting column 202 to the I-shaped slider 303, which is the radius of the circle. After determining the position of the I-shaped slider 303, insert the chalk through the through hole 304. This process is yellow total, the chalk contacts and extrudes the two L-shaped elastic clamping blocks 305, causing the L-shaped elastic clamping blocks 305 to deform and the horizontal part to be clamped into the locking slot 302 inside the corresponding position. At the same time, the L-shaped elastic clamping blocks 305 form a clamping effect with the chalk. In this way, the chalk and the rotating arm 203 are fixed. Then, press the knob 201 with one hand to make the convex connecting column 202 tightly fit the blackboard, and press the chalk with the other hand to make it contact the blackboard and apply a rotating force to it to make it rotate 360 degrees around the convex connecting column 202. In this way, a standard circular pattern can be drawn. The overall operation is simple and convenient (it needs to be noted that in the process of rotating the rotating arm 203 driven by the circumferential rotation of the chalk, the rotating arm 203 can drive the protractor 1 to rotate synchronously, or the rotating arm 202 can rotate first, and then drive the protractor 1 to rotate synchronously when the I-shaped slider 303 rotates to contact the straight end surface of the central control groove 102. Both states do not affect the drawing of a circle).

[0042] The cooperation of the above multiple parts makes the protractor more convenient to draw angles, and also increases the function of drawing circles, making the protractor more functional and providing good auxiliary effect for the drawing operation of mathematics teaching.

[0043] Please refer to Figures 1-3 , a semicircular hole is provided in the center of the lower surface of the protractor body 101 for the convex connecting column 202 to pass through, and a rubber layer is bonded to the lower surface of the convex connecting column 202 and flush with the lower surface of the protractor body 101.

[0044] The rotating arm 203 and the inner wall of the circular rotating groove 103 have frictional resistance.

[0045] In this embodiment: the rubber layer bonded to the lower surface of the convex connecting column 202 can keep the convex connecting column 202 and the blackboard in good contact, providing a stable rotating fulcrum for drawing a circle.

[0046] The frictional resistance between the rotating arm 203 and the inner wall of the circular rotating groove 103 can keep the rotating arm 203 stationary when not subjected to external forces, facilitating angle drawing operations.

[0047] Please refer to Figure 4The through hole 304 is matched with the maximum diameter of the chalk, the vertical part of the L-shaped elastic clamping block 305 is in an initial state of being inclined to the through hole 304, the lateral part is flush with the inner wall of the straight slot 301, and the interval of the two vertical parts of the two L-shaped elastic clamping blocks 305 is smaller than the minimum diameter of the chalk in the initial state.

[0048] In the embodiment, the chalk can pass through the through hole 304 smoothly, the two L-shaped elastic clamping blocks 305 are extruded and deformed, the lateral part of the L-shaped elastic clamping block 305 is clamped with the locking clamping groove 302, the position of the chalk is fixed, the L-shaped elastic clamping block 305 is not in contact with the locking clamping groove 302 when the chalk is not inserted into the through hole 304, and the I-shaped sliding block 303 can slide freely, so that the drawing operation of different diameter circles can be realized.

[0049] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A multifunctional measuring tool for mathematics teaching, comprising a protractor (1) consisting of a protractor body (101) and a hollow groove (102), wherein the hollow groove (102) forms the middle region of the protractor body (101), characterized in that, The hollow groove (102) has a circular groove (103) that penetrates the straight end face of the protractor body (101) on its inner side. A connecting ring block (104) is fixed at the center of the protractor body (101). The protractor body (101) is connected to a drawing component (2) through the circular groove (103) and the connecting ring block (104). The drawing component (2) is used to realize the angle drawing operation. The corner assembly (2) includes a knob (201), a convex connecting post (202), and a rotating arm (203); The convex connecting post (202) is fixed to the bottom of the knob (201), the knob (201) is in contact with the upper surface of the protractor body (101), and the convex connecting post (202) and the connecting ring block (104) are limited to rotate. The rotating arm (203) is rotatably sleeved on the outside of the convex connecting column (202) and extends to the inside of the circular rotating groove (103); The upper surface of the protractor body (101) is provided with a set of angle scale lines in the area near the outer side of the protractor body (101) and the inner side of the hollow groove (102). The angle scale lines near the inner side of the hollow groove (102) are used to indicate the angle between the rotating arm (203) and the straight end face of the hollow groove (102). The straight end face of the hollow groove (102) and the straight end face of the rotating arm (203) can provide guidance for drawing angle lines. The rotating arm (203) is also provided with a circle drawing component (3), which is used to perform circle drawing operations.

2. The multifunctional ruler for mathematics teaching according to claim 1, characterized in that, The circle drawing component (3) includes a straight slot (301), an I-shaped slider (303), and a through hole (304); The straight slot (301) is opened on the upper surface of the rotating arm (203) and completely penetrates the lower surface of the rotating arm (203). The I-shaped slider (303) is limited and slidably connected to the inside of the straight slot (301). The through hole (304) is opened on the top of the I-shaped slider (303) and completely penetrates to the bottom of the through hole (304). By inserting chalk into the through hole (304) and rotating the arm (203) and the protractor body (101) around the knob (201), a circle can be drawn on the blackboard.

3. A multifunctional ruler for mathematics teaching according to claim 2, characterized in that, The circle drawing component (3) also includes a locking groove (302) and an L-shaped elastic block (305); The locking slot (302) is symmetrically opened on both sides of the inner wall of the straight slot (301), and the inner wall of the through hole (304) is formed with notch slots on both sides. The top of the L-shaped elastic block (305) is fixed to the top of the inner wall of the notch slot, and the bottom horizontal part of the L-shaped elastic block (305) faces the locking slot (302). The chalk is inserted into the through hole (304) and contacts the L-shaped elastic block (305), squeezing it so that the bottom horizontal part of the L-shaped elastic block (305) is locked into the inner side of the locking groove (302), which is used to achieve relative fixation between the I-shaped slider (303) and the rotating arm (203).

4. The multifunctional ruler for mathematics teaching according to claim 1, characterized in that, A semi-circular hole is provided at the center of the lower surface of the protractor body (101) for the convex connecting post (202) to pass through, and a rubber layer is bonded to the lower surface of the convex connecting post (202) and is flush with the lower surface of the protractor body (101). There is frictional resistance between the rotating arm (203) and the inner wall of the circular rotating groove (103).

5. A multifunctional ruler for mathematics teaching according to claim 3, characterized in that, The through hole (304) is matched with the maximum diameter of the chalk. In the initial state, the vertical part of the L-shaped elastic block (305) is inclined towards the through hole (304), and the side of the horizontal part is flush with the side of the inner wall of the straight groove (301). In the initial state, the distance between the two vertical parts of the two L-shaped elastic blocks (305) is less than the minimum diameter of the chalk.

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