CN207403446U - A kind of novel mathematics teaching drawing tools - Google Patents

Abstract

The utility model relates to the technical field of middle school mathematics teaching tools, in particular to a new type of drawing tool for mathematics teaching, which includes an angle plate, a guide rail plate, an adjustment pin, a ruler guide rail, a storage tube, and a clamping tube. The bottom surface of the angle plate is uniform There are 4 suction cups distributed, pin holes are set in the middle of the guide rail disc, two penetrating guide rail grooves are symmetrically arranged inside the guide rail disc on both sides of the pin hole, and a ruler guide rail is inserted in the guide rail groove, and the front end of the ruler guide rail is connected with The storage tube, the two ends of the storage tube are fixed with a stretching tube by fixing bolts, and the middle of the storage tube and the end of the stretching tube are provided with clamping tubes. The utility model has a reasonable structural design, can accurately draw straight lines, parallel lines, circles and arcs, does not slip when drawing, draws standards, and can measure angles. It has comprehensive functions, is convenient to use, and saves time and effort. Greatly improved the efficiency of mathematics teaching.

Description

A New Drawing Tool for Mathematics Teaching

technical field

The utility model relates to the technical field of middle school mathematics teaching tools, in particular to a novel drawing tool for mathematics teaching.

Background technique

Mathematics is the science that studies concepts such as quantity, structure, change, and spatial patterns. The most basic feature of mathematics is abstraction, emphasizing logical reasoning. When teaching mathematical problems with a large amount of information or relatively abstract ones, the drawing method can help students better understand mathematical concepts, increase their interest in learning mathematics, and help students answer questions and solve problems, consolidate the mathematical knowledge they have learned, and effectively improve teaching. quality. Drawing tools such as straightedge, triangular ruler and compasses are usually used in mathematics teaching to draw various straight lines, parallel lines, angle scale marks, circles, etc. Most of the existing mathematical drawing tools have single functions, such as rulers can only draw lines , and when drawing a line, the ruler is easy to slip when holding the chalk too hard, causing the line to be not straight. When the compass draws a circle, the needle point is easy to damage the blackboard, and when the semicircle needs to be changed, the needle point is easy to deviate from the center of the circle, resulting in the drawn The circle is not standard. When using the compass to draw the arc, it cannot be drawn directly according to the required angle. It needs a protractor to assist in the measurement. It is inconvenient to use, time-consuming and laborious, and affects the teaching efficiency.

Utility model content

The purpose of this utility model is to provide a new type of drawing tool for mathematics teaching in order to overcome the above-mentioned technical shortcomings.

The technical solution adopted by the utility model to solve the technical problem is: a new type of drawing tool for mathematics teaching, including an angle plate, a guide rail plate, an adjustment pin, a ruler guide rail, a storage tube, and a clamping tube. There are 4 suction cups evenly distributed on the bottom surface of the angle plate, the angle scale line is set on the round edge of the angle plate, the angle pointer is set on the outside of the guide plate, the pin hole is set in the middle of the guide plate, and the pin holes on both sides of the pin hole There are two penetrating guide rail grooves symmetrically inside the guide rail plate, a ruler guide rail is inserted in the guide rail groove, an observation hole is arranged above the guide rail groove, a length pointer is arranged on the outside of the observation hole, and a Fix the bolt, there is a center hole in the middle of the adjusting pin, the outer wall of the lower end of the adjusting pin is provided with external threads, the adjusting pin passes through the pin hole of the guide rail plate and is screwed and fixed with the threaded hole of the angle plate, and the front end of the ruler guide rail is connected with a storage tube , There is a handle on the storage tube, the two ends of the storage tube are fixed with a stretching tube by fixing bolts, the middle of the storage tube and the end of the stretching tube are all equipped with a clamping tube, and the ruler guide rail, the storage tube and the telescopic tube are equipped with There are length scale marks. When you need to draw a straight line, tighten the adjusting pin to fix the guide rail disc tightly, put the chalk in the clamping tube, then attach the suction cup under the angle disc to the blackboard, hold the handle to pull the ruler guide rail, and you can use the chalk on the blackboard When drawing parallel lines, you can put chalk into the clamping tubes at both ends, pull the stretching tube out to the required scale according to the distance between the parallel lines, then use the fixing bolts to fix it, and then pull the ruler guide rail You can draw the desired parallel line by drawing a line. It is very convenient to use. When you need to draw a circle or arc, pull down the ruler guide rail to the required radius, use the fixing bolt to fix the ruler guide rail, and loosen the adjustment pin to make the guide rail The disk can be rotated, and then hold the handle to turn the guide rail disk to draw a circle. According to the indication of the angle pointer, you can also stop drawing the circle when it is rotated to the required angle scale line, and the arc of the required angle can be drawn. When you need to measure the angle between two straight lines, you can align the center hole at the intersection point, and then look at the angle scale line corresponding to the two straight lines to calculate the angle of the included angle. This drawing tool can easily draw straight lines, parallel lines, and circles. It can accurately draw arcs, and can measure angles and lengths. It has comprehensive functions and is easy to use, which greatly improves the efficiency of drawing and effectively improves the efficiency of mathematics teaching.

The line connecting the centers of the two observation holes passes through the center of the center hole and is perpendicular to the ruler guide rail, and the length pointer is located on the line connecting the centers of the two observation holes and points to the center of the observation hole. By observing the length pointer on the outside of the hole, you can easily read the length scale line of the ruler guide rail. When drawing a circle, you can accurately locate the stretching length of the required radius. The drawing is accurate and easy to use.

The lower end of the clamping cylinder is provided with an externally expanding clamping arm, and the outer wall of the clamping cylinder is provided with an external thread, and a locking nut is screwed on the external thread. After inserting the chalk into the clamping barrel, turn the locking nut downwards, and the chalk can be locked and fixed by locking inwardly and outwardly expanding the clamp arm. The exposed length of the chalk can be adjusted without slipping, which is convenient to use.

The beneficial effects of the utility model are: the utility model has a reasonable structural design, can accurately draw straight lines, parallel lines, circles and arcs, does not slip when drawing, draws standards, and can measure angles, It has comprehensive functions, is easy to use, saves time and effort, and greatly improves the efficiency of mathematics teaching.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model.

Accompanying drawing 2 is the structure diagram of the adjusting pin of the present utility model.

Accompanying drawing 3 is the structure diagram of the bottom surface of the angle plate of the present utility model.

Accompanying drawing 4 is the structure diagram of the guide rail disk of the present invention.

Accompanying drawing 5 is the structure schematic diagram of the storage tube and the clamping tube of the utility model.

Detailed ways

Below in conjunction with accompanying drawing 1～accompanying drawing 5, the utility model is described in detail below.

As shown in Figures 1 to 5, the utility model includes an angle plate 1, a guide rail plate 2, an adjustment pin 3, a ruler guide rail 4, a storage tube 6, and a clamping tube 13, and a threaded hole is provided in the middle of the angle plate 1. 19. There are 4 suction cups 9 evenly distributed on the bottom surface of the angle plate 1, the angle scale line 10 is set on the round edge of the angle plate 1, the angle pointer 17 is set on the outside of the guide plate 2, and the pin hole is set in the middle of the guide plate 2 20. There are two penetrating guide rail grooves 21 symmetrically inside the guide rail disk 2 on both sides of the pin hole 20, and a ruler guide rail 4 is inserted in the guide rail groove 21. An observation hole 11 is arranged above the guide rail groove 21, and the outside of the observation hole 11 A length pointer 18 is provided, a fixing bolt 12 is provided above the rail groove 21 on one side of the observation hole 11, a central hole 16 is provided in the middle of the adjustment pin 3, an external thread 22 is provided on the outer wall of the lower end of the adjustment pin 3, and the adjustment pin 3 passes through The pin hole 20 of the guide rail plate 2 is screwed and fixed with the threaded hole 19 of the angle plate 1. The front end of the ruler guide rail 4 is connected with a storage tube 6. The storage tube 6 is provided with a handle 7. The two ends of the storage tube 6 are fixed by fixing bolts 12. Stretching cylinder 8 is arranged, and the end portion of storage cylinder 6 middle and stretching cylinder 8 is all provided with clamping cylinder 13, and ruler guide rail 4, storage cylinder 6 and telescopic cylinder are all provided with length scale mark 5. When it is necessary to draw a straight line, tighten the adjusting pin 3 to fix the guide rail disc 2 tightly, install the chalk in the clamping tube 13, then attach the suction cup 9 under the angle disc 1 to the blackboard, and hold the handle 7 to pull the guide rail of the ruler 4. You can use chalk to draw a straight line on the blackboard. When drawing parallel lines, you can put chalk in the clamping tubes 13 at both ends, and pull the stretching tube 8 to the required scale according to the distance between the parallel lines, and then Use the fixing bolt 12 to fix, and then pull the ruler guide rail 4 to draw a line to draw the required parallel line. Bolt 12 fixes the ruler guide rail 4, unscrews the adjustment pin 3 to allow the guide rail disc 2 to rotate, and then holds the handle 7 to rotate the guide rail disc 2 to draw a circle. According to the indication of the angle pointer 17, it can also be rotated to the desired Stop drawing a circle at the angle scale line 10, and you can draw the arc of the required angle. When you need to measure the angle between two straight lines, you can align the center hole 16 with the intersection point, and then watch the angle scale corresponding to the two straight lines Line 10 can calculate the angle of the included angle. This drawing tool can conveniently draw straight lines, parallel lines, circles and arcs accurately, and can measure angles and lengths. It has comprehensive functions and is easy to use, which greatly improves the drawing quality Effectively improve the efficiency of mathematics teaching.

The connecting line of the centers of the two viewing holes 11 passes through the center of the central hole 16 and is perpendicular to the ruler guide rail 4, and the length pointer 18 is located on the connecting line of the centers of the two viewing holes 11 and points to the center of the viewing hole 11. The length scale line 5 of the ruler guide rail 4 can be easily read through the length pointer 18 on the outside of the observation hole 11, and the drawing length of the required radius can be precisely positioned when drawing a circle. The drawing is accurate and easy to use.

The lower end of the clamping cylinder 13 is provided with an outwardly expanding clamping arm 15 , and an external thread 22 is provided on the outer wall of the clamping cylinder 13 , and a locking nut 14 is screwed on the external thread 22 . After inserting the chalk in the clamping tube 13, rotate the locking nut 14 downwards, and the chalk can be locked and fixed by locking the outwardly expanding clamp arm 15 inwardly.

When drawing a straight line, tighten the adjusting pin 3 to fix the guide rail disc 2 tightly, put the chalk in the clamping tube 13, then attach the suction cup 9 under the angle disc 1 to the blackboard, and pull the ruler guide rail 4 with the handle 7 , you can use chalk to draw a straight line on the blackboard; when drawing parallel lines, you can put chalk in the clamping tubes 13 at both ends, pull the stretching tube 8 to the required scale according to the distance between the parallel lines, and then use Fixing bolt 12 is fixed, then pull ruler guide rail 4 to draw a line and can draw required parallel line; 4. Fix it, unscrew the adjusting pin 3 so that the guide rail disc 2 can rotate, and then hold the handle 7 and turn the guide rail disc 2 to draw a circle. According to the indication of the angle pointer 17, it can also be rotated to the required angle scale line 10 Stop drawing the circle, and you can draw the arc of the desired angle; when measuring the angle between two straight lines, you can align the center hole 16 at the intersection point, and then look at the angle scale line 10 corresponding to the two straight lines to calculate the angle between the two straight lines. The angle of the corner.

Claims (3)

1. a kind of novel mathematics teaching drawing tools, including angle scale, guide rail disk, adjustment pin, ruler guide rail, admission extinguisher, folder Hold cylinder, it is characterised in that：The centre of the angle scale is equipped with threaded hole, and 4 suckers, angle are evenly distributed on the bottom surface of angle scale Angle index line is equipped at round edge above scale, angle indicator is equipped on the outside of guide rail disk, the centre of guide rail disk is equipped with pin hole, pin The guide rail disk internal symmetry of hole both sides is equipped with the guide groove of 2 penetrability, and ruler guide rail is inserted in guide groove, is set above guide groove There is a peep hole, length pointers are equipped on the outside of peep hole, be equipped with fixing bolt above the guide groove of peep hole one side, among adjustment pin Equipped with centre bore, the outer wall of adjustment pin lower end is equipped with external screw thread, and adjustment pin is through the spiral shell with angle scale after the pin hole of guide rail disk Pit is spirally connected fixation, and ruler guide rail front end is connected with admission extinguisher, and admission extinguisher is equipped with handle, and admission extinguisher both ends pass through fixing bolt It is fixed with stretching tube, among the admission extinguisher and end of stretching tube is equipped with clamping cylinder, on ruler guide rail, admission extinguisher and retracting cylinder Equipped with length scale line.

2. a kind of novel mathematics teaching drawing tools according to claim 1, it is characterised in that：2 peep holes For the line at center by the center of centre bore and perpendicular with ruler guide rail, length pointers are located at the line at 2 peep hole centers It goes up and is directed toward the center of peep hole.

3. a kind of novel mathematics teaching drawing tools according to claim 1, it is characterised in that：The clamping cylinder lower end Equipped with clamp arm is extended out, clamping drum outer wall is equipped with external screw thread, locking nut is bolted on external screw thread.