CN210234495U - Teaching instrument for mathematical education - Google Patents

Teaching instrument for mathematical education Download PDF

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Publication number
CN210234495U
CN210234495U CN201921137915.1U CN201921137915U CN210234495U CN 210234495 U CN210234495 U CN 210234495U CN 201921137915 U CN201921137915 U CN 201921137915U CN 210234495 U CN210234495 U CN 210234495U
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China
Prior art keywords
chalk
protractor
rotating rod
groove
teaching instrument
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CN201921137915.1U
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Chinese (zh)
Inventor
Jun Zhou
周军
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Suzhou Desmir Intelligent Technology Co ltd
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Suzhou Desmir Intelligent Technology Co ltd
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Priority to CN201921137915.1U priority Critical patent/CN210234495U/en
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Abstract

The utility model discloses a teaching instrument is used in mathematical education relates to teaching instrument technical field, for solving the problem that the relatively poor and straight line level degree of current practicality is influenced by the proficiency. The utility model discloses a chalk storage device, including protractor, rotation shaft, indicating line, the outside of pivot is provided with first bull stick, the top of first bull stick is provided with the second bull stick, the outside of second bull stick is provided with the indicating line, the outer end of second bull stick is provided with chalk container, the intermediate position department of protractor is provided with level assembly, the below of protractor scale is provided with the window, one side of level assembly is provided with equilateral triangle drawing groove, level assembly's below is provided with the handle, the both sides of handle all are provided with the chalk standing groove, the inside below of protractor is provided with the spout, the inside of spout is provided with the extension dipperstick.

Description

Teaching instrument for mathematical education
Technical Field
The utility model relates to a teaching instrument technical field specifically is a teaching instrument is used in mathematical education.
Background
Along with the continuous development of the education cause of our country, more and more teachers and students are dedicated in the study work, so along with the needs of study, the study of different subjects needs to use different teaching instruments to satisfy the demand of biography and service, so in the mathematical education, often can use the teaching instrument that mathematical education used, make things convenient for mr quick accurate drawing lines or figure on the blackboard, thereby make the quick convenient understanding of classmates and absorb knowledge, thereby improved learning efficiency.
However, although the existing teaching instrument for mathematical education has more functions, the existing teaching instrument for mathematical education has many defects in the aspect of practicability, in the aspect of line drawing, the existing teaching instrument for mathematical education can only meet a fixed circular arc and cannot change the radius of the circular arc, meanwhile, in the aspect of angle reading, errors easily exist, and meanwhile, when the line drawing is carried out, the horizontal degree of a straight line is greatly influenced by proficiency of a teacher and cannot guarantee accurate straight line drawing, so that the drawing effect is influenced in teaching, the existing requirement is not met, and the teaching instrument for mathematical education is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a teaching instrument is used in mathematics teaching to solve the relatively poor and straight line level degree of practicality that proposes in the above-mentioned background art and receive the problem that the proficiency influences.
In order to achieve the above object, the utility model provides a following technical scheme: a teaching instrument for mathematics teaching comprises an angle gauge, wherein a rotating shaft is arranged at a middle position below the inside of the angle gauge, a rotating ring is mounted at the outside of the rotating shaft, a first rotating rod is arranged at the outside of the rotating ring, a second rotating rod is arranged above the first rotating rod, the lower end of the second rotating rod extends into the first rotating rod, an indicating line is arranged at the outside of the second rotating rod, a chalk barrel is arranged at the outer end of the second rotating rod, a chalk mounting groove is formed in the chalk barrel, an adjusting bolt is mounted on one side of the chalk mounting groove, one end of the adjusting bolt extends into the chalk barrel, an anti-skidding groove is formed in the outside of the chalk mounting groove, a horizontal device is arranged at the middle position of the inside of the angle gauge, a transverse plate is arranged at the middle position of the inside of the horizontal device, and an upper vertical plate is arranged above the transverse plate, the below of diaphragm is provided with down the vertical bar, the inside of level device is provided with the error sign, the intermediate position department of diaphragm outer end installs the cotton thread, the below of cotton thread is provided with the iron cone, the upper end of protractor is provided with the protractor scale, the below of protractor scale is provided with the window, one side of level device is provided with equilateral triangle drawing groove, the opposite side of level device is provided with right angled triangle drawing groove, the below of level device is provided with the handle, the both sides of handle all are provided with the chalk standing groove, the lower extreme of protractor is provided with sharp scale, the inside below of protractor is provided with the spout, the inside of spout is provided with the extension dipperstick.
Preferably, the protractor has a length of fifty centimeters and a radius of twenty-five centimeters.
Preferably, a sliding groove is formed in the first rotating rod, a spring piece is arranged outside the lower end of the second rotating rod, and the first rotating rod is connected with the second rotating rod in a sliding mode.
Preferably, the first rotating rod is fixedly connected with the rotating ring, the rotating ring is rotatably connected with the rotating shaft, and the rotating angle range is zero to one hundred eighty degrees.
Preferably, the level device is fixedly connected with the protractor, the plane where the transverse plate is located is parallel to the plane where the protractor is located, the upper vertical plate and the lower vertical plate are of an integrated structure, the upper vertical plate and the lower vertical plate are fixedly connected with the transverse plate, an included angle between the plane where the upper vertical plate and the lower vertical plate are located and the plane where the transverse plate is located is ninety degrees, and the cotton threads are fixed on the central point of the transverse plate.
Preferably, the length of the extension measuring scale is thirty centimeters, and the extension measuring scale is connected with the sliding chute in a sliding mode.
Preferably, the chalk installation groove is thirteen millimeters in diameter and sixty millimeters in length, the chalk installation groove is fixedly connected with the first rotating rod, and the anti-skidding groove and the chalk installation groove are of an integrated structure.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a be provided with the pivot in the intermediate position department of protractor lower extreme, set up the change that has first bull stick in the pivot, make the bull stick can carry out 180 degrees rotations in the inside of protractor, the top of first bull stick is provided with the second bull stick simultaneously, first bull stick and second bull stick sliding connection, can freely control the radius of pitch arc when drawing the pitch arc, the practicality of teaching instrument has been improved, because the inside of first bull stick is provided with the slip recess, the outside of second bull stick is provided with a plurality of spring leaf, make first bull stick and second bull stick can block when flexible and can not take place easily at a certain position and slide, avoid influencing the drawing quality.
2. The utility model discloses a below at the angulation scale is provided with the window, the surface of first bull stick is provided with the indicating line simultaneously, when rotating the bull stick and carrying out the drawing, the pointed scale judgement angle of indicating line can be seen through the window, because observe the chalk and shelter from with the local finger of angulation scale coincidence produces easily, need just can observe the angle with the gaze slope, this kind of condition produces the error easily, and indicating line and window can be more convenient observation angle, thereby the accuracy of ruling has been improved.
3. The utility model discloses a be provided with chalk container in the outer end of second bull stick, through inserting the chalk mounting groove with the chalk, can avoid the hand direct and chalk contact during the marking off, guaranteed the cleanliness of hand, adjusting bolt can adjust according to the not equidimension of chalk simultaneously, and the non-skid groove can improve the frictional force of finger and a chalk section of thick bamboo, plays skid-proof action.
4. The horizontal device is arranged in the middle of the protractor, the transverse plate and the vertical plate inside the horizontal device are in a vertical state, cotton threads with iron cones are installed at the front ends of the transverse plates, the cotton threads with the iron cones are always in a vertical state with the ground surface under the influence of horizontal gravity, in the process of drawing straight lines, the teaching instrument is pressed on the blackboard, when the cotton threads with the iron cones are overlapped with the vertical plate, the straight lines drawn at the moment are represented to be horizontal straight lines, and the problem that the level degree of the straight lines is influenced by proficiency is solved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an overall cross-sectional view of the present invention;
FIG. 3 is a schematic structural view of a chalk cartridge of the present invention;
FIG. 4 is a schematic view of the horizontal device of the present invention;
fig. 5 is a schematic view of the telescopic rod structure of the present invention.
In the figure: 1. a protractor; 2. extending the measuring scale; 3. measuring angle scales; 4. linear scale division; 5. a window; 6. a handle; 7. a chalk placing groove; 8. an equilateral triangular drawing slot; 9. a right triangle drawing slot; 10. rotating the ring; 11. a first rotating lever; 12. an indicator line; 13. a chalk barrel; 14. a second rotating rod; 15. a rotating shaft; 16. a chalk mounting groove; 17. adjusting the bolt; 18. an anti-slip groove; 19. a leveling device; 20. a transverse plate; 21. an upper vertical plate; 22. a lower vertical plate; 23. cotton threads; 24. an iron cone; 25. marking errors; 26. a chute; 27. a sliding groove; 28. a spring plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-5, the present invention provides an embodiment: a teaching instrument for mathematics teaching comprises a protractor 1, a rotating shaft 15 is arranged at a middle position below the inner part of the protractor 1, a rotating ring 10 is mounted on the outer part of the rotating shaft 15, a first rotating rod 11 is arranged on the outer part of the rotating ring 10, a second rotating rod 14 is arranged above the first rotating rod 11, the lower end of the second rotating rod 14 extends to the inner part of the first rotating rod 11, an indicating line 12 is arranged on the outer part of the second rotating rod 14, a chalk barrel 13 is arranged at the outer end of the second rotating rod 14, a chalk installing groove 16 is arranged inside the chalk barrel 13, an adjusting bolt 17 is mounted on one side of the chalk installing groove 16 and can be adjusted according to the size of chalk, so that the chalk can be fixed in the chalk barrel 13, one end of the adjusting bolt 17 extends to the inner part of the chalk barrel 13, an anti-skid groove 18 is arranged on the outer part of the chalk installing groove 16, a horizontal device 19, a transverse plate 20 is arranged in the middle of the inside of the horizontal device 19, an upper vertical plate 21 is arranged above the transverse plate 20, a lower vertical plate 22 is arranged below the transverse plate 20, an error mark 25 is arranged in the horizontal device 19, a cotton thread 23 is arranged in the middle of the outer end of the transverse plate 20, an iron cone 24 is arranged below the cotton thread 23, angle measuring scales 3 are arranged at the upper end of the protractor 1, a window 5 is arranged below the angle measuring scales 3, the scales pointed by the indicating lines 12 can be seen through the window 5, an equilateral triangle drawing groove 8 is arranged at one side of the horizontal device 19, a right triangle drawing groove 9 is arranged at the other side of the horizontal device 19, a handle 6 is arranged below the horizontal device 19, the teaching instrument can be fixed on a blackboard by pressing the handle 6 to prevent the teaching instrument from moving during drawing, chalk placing grooves 7 are arranged at both sides of the handle 6, the lower end of the protractor 1 is provided with the linear scale 4, the lower part of the inside of the protractor 1 is provided with a sliding chute 26, and the inside of the sliding chute 26 is provided with the extension measuring scale 2.
Further, the length of the protractor 1 is fifty centimeters, the radius of the protractor 1 is twenty-five centimeters, and the protractor 1 can play a role in drawing a circle and an arc as one of the main bodies of the teaching instrument.
Further, the inside slip recess 27 that is provided with of first bull stick 11, the outside of second bull stick 14 lower extreme is provided with spring leaf 28, and first bull stick 11 and second bull stick 14 sliding connection can freely control the radius of pitch arc when drawing the pitch arc, have improved teaching instrument's practicality.
Further, first bull stick 11 and swivel 10 fixed connection, swivel 10 and pivot 15 rotate to be connected, and turned angle's interval is zero to one hundred eighty degrees, can make things convenient for the teaching instrument to draw the arc along the centre of a circle.
Further, the horizontal device 19 is fixedly connected with the protractor 1, the plane of the transverse plate 20 is parallel to the plane of the protractor 1, the upper vertical plate 21 and the lower vertical plate 22 are of an integral structure, the upper vertical plate 21 and the lower vertical plate 22 are fixedly connected with the transverse plate 20, the included angle between the plane of the upper vertical plate 21 and the plane of the lower vertical plate 22 and the plane of the transverse plate 20 is ninety degrees, the cotton thread 23 is fixed on the central point of the transverse plate 20, the cotton thread 23 with the iron cone 24 is always vertical to the ground surface under the influence of horizontal gravity, and when the cotton thread 23 with the iron cone 24 is overlapped with the vertical plate, the straight line drawn at the moment is a horizontal straight line.
Further, the length of extension dipperstick 2 is thirty centimetres, and extension dipperstick 2 and spout 26 sliding connection, can extend the straight line length of whole teaching instrument setting-out through setting up extension dipperstick 2, avoids the repeated setting-out error that removes the teaching instrument and produce.
Further, the diameter of chalk mounting groove 16 is thirteen millimeters, and length is sixty millimeters, chalk mounting groove 16 and first bull stick 11 fixed connection, antiskid groove 18 and chalk mounting groove 16 structure as an organic whole, through setting up chalk mounting groove 16, insert the chalk in chalk mounting groove 16, can avoid the direct and chalk contact of hand during the marking off, the cleanliness of hand has been guaranteed, adjusting bolt 17 can adjust according to the not equidimension of chalk simultaneously, antiskid groove 18 can improve the frictional force of finger and a chalk section of thick bamboo 13, play skid-proof action.
The working principle is as follows: when the blackboard eraser is used, a teaching instrument is pressed on a blackboard through the handle 6, drawing is carried out according to different requirements of teacher marking, the rotating shaft 15 is arranged at the middle position of the lower end of the protractor 1, the rotating ring 10 with the first rotating rod 11 is arranged on the rotating shaft 15, so that the rotating rod can rotate 180 degrees in the protractor 1, the second rotating rod 14 is arranged above the first rotating rod 11, the first rotating rod 11 is in sliding connection with the second rotating rod 14, so that the teaching instrument can freely control the radius of an arc line when the arc line is drawn, the chalk barrel 13 is arranged at the outer end of the second rotating rod 14, a chalk is inserted into the chalk mounting groove 16, so that the hand can be prevented from directly contacting with the chalk during marking, the cleanliness of the hand is ensured, meanwhile, the adjusting bolt 17 can be adjusted according to different sizes of the chalk, the anti-skid groove 18 can improve the friction force between fingers and the chalk barrel 13, and plays an anti-skid action, the practicability of the teaching instrument is greatly improved on the whole, because the sliding groove 27 is arranged in the first rotating rod 11, the spring pieces 28 are arranged outside the second rotating rod 14, the first rotating rod 11 and the second rotating rod 14 can be clamped at a certain position when being extended and retracted, the sliding cannot easily occur, the drawing quality is prevented from being influenced, meanwhile, the window 5 is arranged below the angle measuring scale 3, the indicating line 12 is arranged on the surface of the first rotating rod 11, the scale judgment angle pointed by the indicating line 12 can be seen through the window 5, the traditional teaching instrument draws an arc, the finger at the position where chalk is overlapped with the angle measuring scale 3 is easy to be shielded, the angle can be observed only by inclining the eye, the error is easy to occur in the condition, the indicating line 12 and the angle can be observed more conveniently by the window 5, the accuracy of line drawing is improved, in addition, the horizontal device 19 is arranged at the middle position of the angle measuring instrument 1, the transverse plate 20 inside the horizontal device 19 is vertical to the vertical plate, the cotton thread 23 with the iron cone 24 is installed at the front end of the transverse plate 20, the cotton thread 23 with the iron cone 24 is always vertical to the ground surface under the influence of horizontal gravity, and when the cotton thread 23 with the iron cone 24 is overlapped with the vertical plate in the process of drawing a straight line, the drawn straight line is a horizontal straight line, so that the problem that the horizontal degree of the straight line is influenced by proficiency is solved.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (7)

1. The utility model provides a teaching instrument for mathematical education, includes protractor (1), its characterized in that: the chalk box is characterized in that a rotating shaft (15) is arranged at the middle position of the lower portion inside the protractor (1), a rotating ring (10) is mounted outside the rotating shaft (15), a first rotating rod (11) is arranged outside the rotating ring (10), a second rotating rod (14) is arranged above the first rotating rod (11), the lower end of the second rotating rod (14) extends into the first rotating rod (11), an indicating line (12) is arranged outside the second rotating rod (14), a chalk barrel (13) is arranged at the outer end of the second rotating rod (14), a chalk mounting groove (16) is arranged inside the chalk barrel (13), an adjusting bolt (17) is mounted on one side of the chalk mounting groove (16), one end of the adjusting bolt (17) extends into the chalk barrel (13), an anti-skid groove (18) is arranged outside the chalk mounting groove (16), and a horizontal device (19) is arranged at the middle position of the protractor (1), the chalk drawing device is characterized in that a transverse plate (20) is arranged at the middle position inside the horizontal device (19), an upper vertical plate (21) is arranged above the transverse plate (20), a lower vertical plate (22) is arranged below the transverse plate (20), an error mark (25) is arranged inside the horizontal device (19), cotton threads (23) are arranged at the middle position of the outer end of the transverse plate (20), an iron cone (24) is arranged below the cotton threads (23), angle measuring scales (3) are arranged at the upper end of the angle measuring device (1), a window (5) is arranged below the angle measuring scales (3), an equilateral triangle drawing groove (8) is arranged on one side of the horizontal device (19), a right triangle drawing groove (9) is arranged on the other side of the horizontal device (19), a handle (6) is arranged below the horizontal device (19), chalk placing grooves (7) are arranged on the two sides of the handle (6), the lower extreme of protractor (1) is provided with straight line scale (4), the inside below of protractor (1) is provided with spout (26), the inside of spout (26) is provided with extension dipperstick (2).
2. A teaching instrument for mathematics as claimed in claim 1, wherein: the length of the protractor (1) is fifty centimeters, and the radius of the protractor is twenty-five centimeters.
3. A teaching instrument for mathematics as claimed in claim 1, wherein: a sliding groove (27) is formed in the first rotating rod (11), a spring piece (28) is arranged outside the lower end of the second rotating rod (14), and the first rotating rod (11) is connected with the second rotating rod (14) in a sliding mode.
4. A teaching instrument for mathematics as claimed in claim 1, wherein: first bull stick (11) and swivel (10) fixed connection, swivel (10) rotate with pivot (15) and are connected, and the interval of turned angle is zero to one hundred eighty degrees.
5. A teaching instrument for mathematics as claimed in claim 1, wherein: horizontal installation (19) and protractor (1) fixed connection, and the place plane of diaphragm (20) is parallel to each other with protractor (1) place plane, go up vertical plate (21) and lower vertical plate (22) structure as an organic whole, and go up vertical plate (21) and lower vertical plate (22) and diaphragm (20) fixed connection, the contained angle is ninety degrees between the place plane of going up vertical plate (21) and lower vertical plate (22) and diaphragm (20) place plane, cotton line (23) are fixed in on the central point of diaphragm (20).
6. A teaching instrument for mathematics as claimed in claim 1, wherein: the length of the extension measuring scale (2) is thirty centimeters, and the extension measuring scale (2) is in sliding connection with the sliding groove (26).
7. A teaching instrument for mathematics as claimed in claim 1, wherein: the chalk installation groove (16) is thirteen millimeters in diameter and sixty millimeters in length, the chalk installation groove (16) is fixedly connected with the first rotating rod (11), and the anti-skidding groove (18) and the chalk installation groove (16) are of an integrated structure.
CN201921137915.1U 2019-07-19 2019-07-19 Teaching instrument for mathematical education Active CN210234495U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921137915.1U CN210234495U (en) 2019-07-19 2019-07-19 Teaching instrument for mathematical education

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921137915.1U CN210234495U (en) 2019-07-19 2019-07-19 Teaching instrument for mathematical education

Publications (1)

Publication Number Publication Date
CN210234495U true CN210234495U (en) 2020-04-03

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ID=69991901

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921137915.1U Active CN210234495U (en) 2019-07-19 2019-07-19 Teaching instrument for mathematical education

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CN (1) CN210234495U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112810364A (en) * 2021-01-28 2021-05-18 无锡科技职业学院 Mathematics plotter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112810364A (en) * 2021-01-28 2021-05-18 无锡科技职业学院 Mathematics plotter

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