CN210073014U - Student mathematics classroom angle learning device - Google Patents

Abstract

The utility model provides a student's mathematics classroom angle learning device, including teaching demonstration platform, bracing piece, fixed suction cup, ball bearing, the locking sleeve pipe, but rotation angle pointer structure conveniently explains demonstration board structure, can accomodate the dust cover structure, semi-circular angle board, the box is placed to the blackboard eraser, adjusts the rope, the slip pointer piece, locking bolt and design bolt, the bracing piece difference bolted connection in the lower surface four corners position of teaching demonstration platform. The angle marking needle and the marking scale are arranged, so that line drawing marks of angles can be favorably carried out, the explanation to students is facilitated, and numerical values can be read; the arrangement of the placing groove, the rubber spring rope and the explaining writing pen is beneficial to playing a role in containing, and teaching is carried out on the angle explaining board; the dustproof cloth storage box and the dustproof cloth cover are favorable for shielding and preventing dust, and the dustproof cloth cover is convenient to store and place.

Description

Student mathematics classroom angle learning device

Technical Field

The utility model belongs to the technical field of learning device, especially, relate to a student's mathematics classroom angle learning device.

Background

The elementary school students, generally speaking, are students who are studying in elementary school and are generally 6-11 years old. Mathematics is a subject of studying concepts such as quantity, structure, variation, space, and information, and belongs to a form science from a certain point of view. Angle, a mathematical term, represents the amount of angle, usually expressed in degrees or radians. Can also be used for figuring out the starting point of the affairs.

A measure of the amount by which any one of two intersecting straight lines must be rotated when superimposed on the other, the rotation being in the plane of the two straight lines and about the point of intersection. The angle is the unit used to measure the angle, and the symbol is. One cycle is divided into 360 equal portions, each defined as 1 degree (1 °). A number of 360 is used because it is easily divisible. 360 have 22 real factors in addition to 1 and itself, including numbers from 2 to 10 in addition to 7, so many particular angular angles are integers. In practical applications, the integral angle is accurate enough. Sometimes more accurate measurements are needed, such as astronomy or longitude and latitude of the earth, which, in addition to being expressed in decimal degrees, can be subdivided into minutes and seconds: the 1 degree is 60 min (60 '), and the 1 min is 60 sec (60'). For example 40.1875 ° -40 ° 11' 15 ". To be more accurate, the fraction of a second is used and no units are added.

The current teacher does not have a special learning device when teaching angle knowledge, but lets pupils monotonously listen to the teacher teaching, can not participate in operating angle change specifically, can not directly perceived low recognition angle, also can not leave dark impression for pupils, leads to many pupils to listen to the class and be boring and tasteless, also does not have interest in learning on class, and then leads to the learning effect poor, hardly masters.

The invention discloses a Chinese patent publication No. CN205428315U, and provides a pupil mathematics classroom angle learning device, which comprises a demonstration table, a left support, a top support, an electric push rod IV, an electric push rod V, a connecting block II, an electric push rod I, an electric push rod II, a wheel I, an electric push rod III, a connecting block I, a rope I, a vertical slide rail, a horizontal slide rail, a slide block II, a slide block I, a slide block III, a connecting block IV, a connecting block III, a wheel II and a rope II, wherein the left support is arranged on the left side of the demonstration table. But the current student mathematics classroom angle learning device still has the teaching explanation inconvenient, does not possess the conversion demonstration function between the angle and does not possess the problem of dustproof function.

Therefore, the invention of the device for learning the mathematical classroom angles of the students is very necessary.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a student's mathematics classroom angle learning device to it is inconvenient to solve the teaching explanation of current student's mathematics classroom angle learning device, does not possess the problem of conversion demonstration function between the angle and do not possess dustproof function. A student mathematics classroom angle learning device comprises a teaching demonstration platform, supporting rods, a fixed sucker, a ball bearing, a locking sleeve and a rotatable angle indicator needle structure, is convenient for explaining a demonstration board structure, can accommodate a dust cover structure, a semicircular angle board, a circular angle board, an eraser placing box, an adjusting rope, a sliding pointer sheet, a locking bolt and a shaping bolt, wherein the supporting rods are respectively bolted at four corners of the lower surface of the teaching demonstration platform; the fixed sucker is glued to the lower surface of the support rod; the ball bearing is embedded in the upper left side of the interior of the teaching demonstration platform; the locking sleeve screw is connected to the upper left side of the upper surface of the teaching demonstration table; the pointer structure capable of rotating the angle is arranged in the middle of the upper surface of the teaching demonstration table; the convenient explanation demonstration board structure is fixed in the ball bearing; the dust cover structure capable of being accommodated is arranged at the right side position of the upper surface of the teaching demonstration platform; the semicircular angle plate is arranged at the upper part of the rear side of the rotatable angle indicating needle structure; the circular angle plate is arranged at the front part of the semicircular angle plate; the blackboard eraser placing box is arranged between the locking sleeve and the rotatable angle indicating needle structure and is glued with the teaching demonstration table; the adjusting rope is glued to the lower end of the sliding pointer sheet; the sliding pointer sheet is clamped at the right upper side of the outer surface of the semicircular angle plate and is fixed by a locking bolt; the locking bolt is in threaded connection with the middle position of the right side of the sliding pointer piece; the shaping bolt is in threaded connection with the middle position of the front surface of the locking sleeve; the rotatable angle indicating needle structure comprises a fixed connecting plate, a supporting seat, a bolt nut, an angle marking needle, a marking scale and an observation hole, wherein the supporting seat is longitudinally bolted at the middle position of the upper surface of the fixed connecting plate; the angle marking needle and the marking scale are connected to the upper part of the rear surface of the supporting seat through bolts and nuts; the angle marking needle is arranged at the upper part of the marking scale; the observation hole is arranged in the middle of the right side of the front surface of the marking scale.

Preferably, the convenient explanation demonstration board structure comprises a support column, a transverse suspension rod, a placing groove, a rubber spring rope, an explanation writing pen, an angle explanation board and a lower clamping board, wherein the transverse suspension rod is connected to the upper end of the support column through a bolt; the placing groove is formed in the middle of the upper side inside the transverse hanging rod; one end of the rubber spring rope is connected to the middle position of the right side of the explaining writing pen in an adhesive mode, and the other end of the rubber spring rope is connected to the right side inside the placing groove in an adhesive mode; the explaining writing pen is placed in the placing groove; one end of the angle explanation plate is connected with the lower part of the rear surface of the transverse suspender through a screw, and the other end of the angle explanation plate is clamped at the upper side inside the lower clamping plate; and the lower clamping plate is transversely glued at the lower part of the left side of the supporting column.

Preferably, the structure capable of accommodating the dust cover comprises a dustproof cloth storage box, a nameplate sticker, a dustproof cloth cover, elastic rubber ribs, a binding rope and a hand pull ring, wherein the nameplate sticker is adhered to the left lower side of the front surface of the dustproof cloth storage box; the dustproof cloth cover is glued at the middle position of the inner lower surface of the dustproof cloth storage box; the elastic rubber band strips are embedded in the periphery of the inner part of the dustproof cloth cover; the binding ropes are respectively sewn at the left side and the right side of the upper part of the dustproof cloth cover; the hand pull ring is glued at the top end of the binding rope.

Preferably, the dustproof cloth storage box is connected with the teaching demonstration table in a gluing mode; dustproof cloth receiver specifically adopt the PVC plastic box that oval through-hole was seted up on upper portion.

Preferably, the binding rope is a nylon rope; the dustproof cloth cover is made of nylon cloth; the elastic rubber band strip adopts a rubber band with the diameter of one millimeter to three millimeters.

Preferably, the marking ruler is a rectangular stainless steel ruler; the observation hole is a rectangular hole.

Preferably, the fixed connecting plate is a rectangular stainless steel plate; the fixed connection plate is connected with the teaching demonstration table through bolts.

Preferably, the teaching demonstration table is made of a PVC plastic plate with the thickness of ten millimeters to twenty millimeters; the adjusting rope is specifically a nylon rope.

Preferably, the semicircular angle plate and the circular angle plate are respectively made of PVC plastic plates; the semicircular angle plate and the circular angle plate are connected to the rear surface of the supporting seat through bolts and nuts; the circular angle plate is arranged at the rear part of the marking scale.

Preferably, the lower clamping plate is a PVC plastic clamping plate with a groove; the supporting column longitudinally penetrates through the locking sleeve to be inserted into the inner ring of the ball bearing and is fixed by a shaping bolt; the support column is in interference fit with an inner ring of the ball bearing.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses in, angle marking needle and marking scale's setting, be favorable to carrying out the setting-out sign of angle, conveniently explain the student to can carry out reading of numerical value.

2. The utility model discloses in, the setting of semi-circular angle board and circular angle board, be favorable to when the angle study explanation, through the contrast of semicircle and circle, make things convenient for the student to the understanding of angle.

3. The utility model discloses in, standing groove, rubber spring rope and explanation writing pen's setting are favorable to playing the effect of accomodating, convenient on the angle explanation board is taught.

4. The utility model discloses in, support column, ball bearing, the setting of locking sleeve pipe and design bolt is favorable to adjusting fixedly to the angle of explanation board, conveniently demonstrates to equidirectional student, increases the interactive in classroom.

5. The utility model discloses in, the regulation rope, the setting of slip pointer piece and locking bolt is favorable to carrying out the sliding adjustment to the tensile regulation rope carries out the sign of angle, makes things convenient for the student to the grasp of angle knowledge.

6. The utility model discloses in, dustproof cloth receiver and dustproof cloth cover's setting, be favorable to playing when this learning device does not use and shelter from dirt-proof effect to the convenience is accomodate dustproof cloth cover and is placed.

7. The utility model discloses in, the setting of data plate subsides, be favorable to carrying out the mark to this learning device, the seeking when conveniently using.

8. The utility model discloses in, bracing piece and fixed suction cup's setting, be favorable to playing the effect of supporting the design, guarantee the device's stability, guarantee effectively going on of teaching demonstration.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the rotatable angle indicating needle structure of the present invention.

Fig. 3 is a schematic structural view of the demonstration board structure for easy explanation of the present invention.

Fig. 4 is a schematic structural view of the storable dust cap structure of the present invention.

In the figure:

1. a teaching demonstration table; 2. a support bar; 3. fixing the sucker; 4. a ball bearing; 5. locking the sleeve; 6. a rotatable angle pointer structure; 61. fixing the connecting plate; 62. a supporting seat; 63. a bolt and a nut; 64. an angle marking needle; 65. a marking scale; 66. an observation hole; 7. the demonstration board structure is convenient to explain; 71. a support pillar; 72. a transverse boom; 73. a placement groove; 74. a rubber spring cord; 75. explaining the writing pen; 76. an angle explanation board; 77. a lower clamping plate; 8. a dust cover structure can be accommodated; 81. a dustproof cloth storage box; 82. a nameplate sticker; 83. a dust cloth cover; 84. elastic rubber bands; 85. binding the rope; 86. a hand-pulling ring; 9. a semicircular angle plate; 10. a circular angle plate; 11. an eraser placing box; 12. adjusting the rope; 13. sliding the pointer sheet; 14. locking the bolt; 15. and (5) shaping the bolt.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

example (b):

as shown in fig. 1 to 2, the utility model provides a student mathematics classroom angle learning device, which comprises a teaching demonstration platform 1, a support rod 2, a fixed sucker 3, a ball bearing 4, a locking sleeve 5, a rotatable angle pointer structure 6, a demonstration board structure 7 convenient for explanation, a dust cover structure 8 capable of being accommodated, a semicircular angle board 9, a circular angle board 10, an eraser placing box 11, an adjusting rope 12, a sliding pointer sheet 13, a locking bolt 14 and a shaping bolt 15, wherein the support rod 2 is respectively bolted at four corners of the lower surface of the teaching demonstration platform 1; the fixed sucker 3 is glued to the lower surface of the support rod 2; the ball bearing 4 is embedded in the upper left side of the interior of the teaching demonstration platform 1; the locking sleeve 5 is connected to the upper left side of the upper surface of the teaching demonstration table 1 through a screw; the indicating needle structure 6 capable of rotating the angle is arranged in the middle of the upper surface of the teaching demonstration table 1; the convenient explanation demonstration board structure 7 is fixed in the ball bearing 4; the dust cover structure 8 is arranged at the right side of the upper surface of the teaching demonstration table 1; the semicircular angle plate 9 is arranged at the upper position of the rear side of the rotatable angle indicating needle structure 6; the round angle plate 10 is arranged at the front part of the semicircular angle plate 9; the blackboard eraser placing box 11 is arranged between the locking sleeve 5 and the angle-rotatable pointer structure 6 and is glued with the teaching demonstration table 1; the adjusting rope 12 is glued to the lower end of the sliding pointer sheet 13; the sliding pointer sheet 13 is clamped at the right upper side of the outer surface of the semicircular angle plate 9 and is fixed by a locking bolt 14; the locking bolt 14 is in threaded connection with the middle position of the right side of the sliding pointer piece 13; the shaping bolt 15 is in threaded connection with the middle position of the front surface of the locking sleeve 5; the rotatable angle indicating needle structure 6 comprises a fixed connecting plate 61, a supporting seat 62, a bolt nut 63, an angle marking needle 64, a marking scale 65 and an observation hole 66, wherein the supporting seat 62 is longitudinally bolted at the middle position of the upper surface of the fixed connecting plate 61; the angle marking needle 64 and the marking scale 65 are connected to the upper part of the rear surface of the supporting seat 62 through a bolt and a nut 63; the angle marking needle 64 is arranged at the upper part of the marking scale 65; the observation hole 66 is arranged at the middle position of the right side of the front surface of the marking scale 65; the learning device is placed on a teacher's desk, and the fixed sucker 3 is adsorbed on the desk top of the teacher's desk, so that the stability of the device is ensured; a teacher dials the angle marking pin 64 according to the requirement of angle explanation, so that the angle marking pin 64 rotates at the front parts of the semicircular angle plate 9 and the circular angle plate 10, the change of the angle is explained for students, and meanwhile, the adjusting rope 12 can be pulled to connect the corresponding angle numerical values of the semicircular angle plate 9 and the circular angle plate 10, so that the students can conveniently master and learn the angle mathematical knowledge; the values on the semicircular angle plate 9 can be read through the observation hole 66 during teaching.

In the above embodiment, as shown in fig. 3, specifically, the presentation board structure for facilitating explanation 7 includes a supporting column 71, a horizontal hanging rod 72, a placing groove 73, a rubber spring string 74, an explanation pen 75, an angle explanation board 76 and a lower clamping board 77, wherein the horizontal hanging rod 72 is bolted to the upper end of the supporting column 71; the placing groove 73 is arranged at the middle position of the upper side inside the transverse suspension rod 72; one end of the rubber spring rope 74 is glued to the middle position of the right side of the explaining writing pen 75, and the other end of the rubber spring rope is glued to the right side inside the placing groove 73; the explaining writing pen 75 is placed in the placing groove 73; one end of the angle explanation plate 76 is connected with the lower part of the rear surface of the transverse suspender 72 through a screw, and the other end is clamped at the upper side inside the lower clamping plate 77; the lower clamping plate 77 is transversely glued at the lower position of the left side of the supporting column 71; in the teaching demonstration process, the supporting column 71 is rotated, so that the supporting column 71 rotates on the ball bearing 4 and the locking sleeve 5, the angle of the angle explanation plate 76 is adjusted, the shaping bolt 15 is screwed for shaping, the explanation writing pen 75 is taken out from the placing groove 73, writing of writing on a blackboard is carried out on the angle explanation plate 76, and teaching fluency is improved.

As shown in fig. 4, in the above embodiment, specifically, the storable dust cover structure 8 includes a dust cloth storage box 81, a nameplate sticker 82, a dust cloth cover 83, a stretch elastic band 84, a binding rope 85 and a hand ring 86, and the nameplate sticker 82 is adhered to the left lower side of the front surface of the dust cloth storage box 81; the dustproof cloth cover 83 is glued in the middle of the inner lower surface of the dustproof cloth storage box 81; the elastic rubber band strips 84 are embedded in the periphery of the interior of the dustproof cloth cover 83; the binding ropes 85 are respectively sewn at the left side and the right side of the upper part of the dustproof cloth cover 83; the hand pull ring 86 is glued at the top end of the binding rope 85; draw from the dustproof cloth receiver 81 and locate dustproof cloth cover 83 to cover in the upper portion of semi-circular angle board 9 and circular angle board 10, play dirt-proof effect, and will tie up rope 85 and be in the same place, play fixed effect.

In the above embodiment, specifically, the dustproof cloth storage box 81 is arranged in a gluing manner with the teaching demonstration table 1; dustproof cloth receiver 81 specifically adopt the PVC plastic box that oval through-hole was seted up on upper portion.

In the above embodiment, specifically, the binding rope 85 is specifically a nylon rope; the dustproof cloth cover 83 is made of nylon cloth; the elastic rubber band 84 is made of rubber band with the diameter of one to three millimeters.

In the above embodiment, specifically, the marking scale 65 specifically adopts a rectangular stainless steel ruler; the observation hole 66 is a rectangular hole.

In the above embodiment, specifically, the fixed connection plate 61 is a rectangular stainless steel plate; the fixed connecting plate 61 is connected with the teaching demonstration table 1 through bolts.

In the above embodiment, specifically, the teaching demonstration table 1 is made of a PVC plastic plate with a thickness of ten mm to twenty mm; the adjusting rope 12 is specifically a nylon rope.

In the above embodiment, specifically, the semicircular angle plate 9 and the circular angle plate 10 are respectively made of PVC plastic plates; the semicircular angle plate 9 and the circular angle plate 10 are connected to the rear surface of the supporting seat 62 through bolts and nuts 63; the circular angle plate 10 is provided at the rear of the scribing scale 65.

In the above embodiment, specifically, the lower clamping plate 77 is specifically a PVC plastic clamping plate with a groove; the supporting column 71 longitudinally penetrates through the locking sleeve 5 and is inserted into the inner ring of the ball bearing 4 and fixed by a shaping bolt 15; the support column 71 is in interference fit with the inner ring of the ball bearing 4.

Principle of operation

When the utility model is used, the learning device is placed on the teacher's desk, and the fixed sucker 3 is adsorbed on the desk top of the teacher's desk, so as to ensure the stability of the device; a teacher dials the angle marking pin 64 according to the requirement of angle explanation, so that the angle marking pin 64 rotates at the front parts of the semicircular angle plate 9 and the circular angle plate 10, the change of the angle is explained for students, and meanwhile, the adjusting rope 12 can be pulled to connect the corresponding angle numerical values of the semicircular angle plate 9 and the circular angle plate 10, so that the students can conveniently master and learn the angle mathematical knowledge; the numerical value on the semicircular angle plate 9 can be read through the observation hole 66 in the teaching process; in the teaching demonstration process, the supporting column 71 is rotated, so that the supporting column 71 rotates on the ball bearing 4 and the locking sleeve 5, the angle of the angle explanation plate 76 is adjusted, the shaping bolt 15 is screwed for shaping, the explanation writing pen 75 is taken out from the placing groove 73, the writing of the blackboard writing is carried out on the angle explanation plate 76, and the teaching fluency is improved; when not in use, the dustproof cloth cover 83 is pulled from the dustproof cloth storage box 81 and covers the upper parts of the semicircular angle plate 9 and the circular angle plate 10 to play a dustproof role, and the binding rope 85 are tied together to play a fixing role.

Utilize technical scheme, or technical personnel in the field are in the utility model discloses under technical scheme's the inspiration, design similar technical scheme, and reach above-mentioned technological effect, all fall into the utility model discloses a protection scope.

Claims (10)

1. The device for learning the angles of the mathematics classroom of the students is characterized by comprising a teaching demonstration platform (1), supporting rods (2), a fixed sucker (3), a ball bearing (4), a locking sleeve (5), a rotatable angle pointer structure (6), a demonstration plate structure (7) convenient to explain, a dust cover structure (8) capable of being accommodated, a semicircular angle plate (9), a circular angle plate (10), a blackboard eraser placing box (11), an adjusting rope (12), a sliding pointer sheet (13), locking bolts (14) and shaping bolts (15), wherein the supporting rods (2) are respectively bolted at four corners of the lower surface of the teaching demonstration platform (1); the fixed sucker (3) is glued to the lower surface of the support rod (2); the ball bearing (4) is embedded in the upper left side of the interior of the teaching demonstration table (1); the locking sleeve (5) is connected to the upper left side of the upper surface of the teaching demonstration table (1) through a screw; the indicating needle structure (6) capable of rotating the angle is arranged in the middle of the upper surface of the teaching demonstration table (1); the convenient explanation demonstration board structure (7) is fixed in the ball bearing (4); the dust cover structure (8) is arranged at the right side of the upper surface of the teaching demonstration table (1); the semicircular angle plate (9) is arranged at the upper part of the rear side of the rotatable angle indicating needle structure (6); the round angle plate (10) is arranged at the front part of the semicircular angle plate (9); the blackboard eraser placing box (11) is arranged between the locking sleeve (5) and the angle-rotatable pointer structure (6) and is glued with the teaching demonstration table (1); the adjusting rope (12) is glued to the lower end of the sliding pointer sheet (13); the sliding pointer sheet (13) is clamped at the right upper side of the outer surface of the semicircular angle plate (9) and is fixed by a locking bolt (14); the locking bolt (14) is in threaded connection with the middle position of the right side of the sliding pointer piece (13); the shaping bolt (15) is in threaded connection with the middle position of the front surface of the locking sleeve (5); the rotatable angle indicating needle structure (6) comprises a fixed connecting plate (61), a supporting seat (62), a bolt nut (63), an angle marking needle (64), a marking ruler (65) and an observation hole (66), wherein the supporting seat (62) is longitudinally bolted at the middle position of the upper surface of the fixed connecting plate (61); the angle marking needle (64) and the marking scale (65) are connected to the upper part of the rear surface of the supporting seat (62) through a bolt and a nut (63); the angle marking needle (64) is arranged at the upper part of the marking scale (65); the observation hole (66) is arranged at the middle position of the right side of the front surface of the marking scale (65).

2. The student mathematics classroom angle learning device of claim 1, characterized in that the convenient explanation demonstration board structure (7) comprises a supporting column (71), a horizontal suspension rod (72), a placement groove (73), a rubber spring rope (74), an explanation writing pen (75), an angle explanation board (76) and a lower clamping board (77), wherein the horizontal suspension rod (72) is bolted on the upper end of the supporting column (71); the placing groove (73) is arranged at the middle position of the upper side in the transverse hanging rod (72); one end of the rubber spring rope (74) is connected to the middle position of the right side of the explaining writing pen (75) in an adhesive mode, and the other end of the rubber spring rope (74) is connected to the right side inside the placing groove (73) in an adhesive mode; the explaining writing pen (75) is placed in the placing groove (73); one end of the angle explanation plate (76) is connected with the lower part of the rear surface of the transverse suspender (72) through a screw, and the other end is clamped at the upper side inside the lower clamping plate (77); the lower clamping plate (77) is transversely glued at the lower position of the left side of the supporting column (71).

3. The device for learning the angles in the mathematical classroom of students according to claim 1, wherein the structure (8) for accommodating the dust cover comprises a dust cloth storage box (81), a nameplate sticker (82), a dust cloth cover (83), an elastic rubber band (84), a binding rope (85) and a hand pull ring (86), wherein the nameplate sticker (82) is adhered to the left lower side of the front surface of the dust cloth storage box (81); the dustproof cloth cover (83) is glued at the middle position of the inner lower surface of the dustproof cloth storage box (81); the elastic rubber band strips (84) are embedded at the periphery of the inner part of the dustproof cloth cover (83); the binding ropes (85) are respectively sewn at the left side and the right side of the upper part of the dustproof cloth cover (83); the hand pull ring (86) is glued at the top end of the binding rope (85).

4. The device for learning the angles in the mathematical classroom of the students as claimed in claim 3, wherein the dustproof cloth storage box (81) is arranged in a way of being glued with the teaching demonstration table (1); dustproof cloth receiver (81) specifically adopt the PVC plastic box that oval through-hole was seted up on upper portion.

5. The device for learning the angles in the mathematical class of students as claimed in claim 3, wherein the binding rope (85) is made of nylon; the dustproof cloth cover (83) is made of nylon cloth; the elastic rubber band (84) adopts a rubber band with the diameter of one millimeter to three millimeters.

6. The student mathematics classroom angle learning device of claim 1 wherein said marking ruler (65) is embodied as a rectangular stainless steel ruler; the observation hole (66) is a rectangular hole.

7. The device for learning the angles in the mathematical classroom of students according to claim 1, wherein the fixed connecting plate (61) is a rectangular stainless steel plate; the fixed connecting plate (61) is connected with the teaching demonstration table (1) through bolts.

8. The device for learning the angles in the mathematical classroom of students as claimed in claim 1, wherein the teaching demonstration table (1) is made of a PVC plastic plate with the thickness of ten mm to twenty mm; the adjusting rope (12) is a nylon rope.

9. The device for learning the angles in the mathematics classroom of students according to claim 1, characterized in that the semicircular angle plate (9) and the circular angle plate (10) are made of PVC plastic plates respectively; the semicircular angle plate (9) and the circular angle plate (10) are connected to the rear surface of the supporting seat (62) through bolts and nuts (63); the circular angle plate (10) is arranged at the rear part of the marking scale (65).

10. The device for learning the angles in the mathematics classroom of students according to claim 2, characterized in that the lower clamping plate (77) is a PVC plastic clamping plate with grooves; the supporting column (71) longitudinally penetrates through the locking sleeve (5) and is inserted into the inner ring of the ball bearing (4) and fixed by a shaping bolt (15); the support column (71) is in interference fit with an inner ring of the ball bearing (4).

Images