CN112693252A

CN112693252A - Mathematics teaching is with supplementary teaching device

Info

Publication number: CN112693252A
Application number: CN202110125305.5A
Authority: CN
Inventors: 刘红; 钱余欣; 杨梅; 宋超
Original assignee: Chongqing College of Electronic Engineering
Current assignee: Chongqing College of Electronic Engineering
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-04-23
Anticipated expiration: 2041-01-29
Also published as: CN112693252B

Abstract

The invention belongs to the technical field of auxiliary tools for writing or drawing, and discloses an auxiliary teaching device for mathematical teaching, which comprises a mounting frame, wherein two ends of the mounting frame are provided with abutting rods, and a circular disc is rotatably connected to the mounting frame; a holding rod is eccentrically arranged on one side of the disc, a positioning column is coaxially fixed on the other side of the disc, a drawing rod is hinged on one side of the disc, on which the positioning column is arranged, and the drawing rod is eccentrically hinged on the disc; the drawing rod comprises a positioning portion and a drawing portion, the positioning portion is hinged to the disc, a sliding groove is formed in one end, far away from the disc, of the positioning portion, the drawing portion is connected into the sliding groove in a sliding mode, a spring is arranged between the drawing portion and the sliding groove, and a chalk placing hole is formed in one end, far away from the positioning portion, of the drawing portion. The compasses solve the problems that in teaching, teachers are not easy to complete the whole circle rotation at one time, so that circles are drawn discontinuously, the compasses are easy to deviate, the drawn circles are irregular in size, and the students in teaching feel poor.

Description

Mathematics teaching is with supplementary teaching device

Technical Field

The invention belongs to the technical field of auxiliary tools for writing or drawing, and particularly relates to an auxiliary teaching device for mathematical teaching.

Background

Mathematics is a subject of studying concepts such as quantity, structure, variation, space and information, and auxiliary tools such as compasses, rulers and protractors are commonly used in mathematical education. Wherein the compasses are the essential appurtenance in the teaching of geometry discipline, in the teaching, watch for the convenience student, need draw great circle on the blackboard usually, therefore the rotation range of compasses is great, because the blackboard is by the wall setting, the mr is difficult for once only accomplishing the rotation of whole circle, can make the drawing circle appear being interrupted, therefore the compasses easily takes place the skew, and then lead to the circular size of drawing irregular, influence the impression in the teaching.

Disclosure of Invention

The invention aims to provide an auxiliary teaching device for mathematical teaching, which aims to solve the problems that in the teaching process, a teacher is not easy to complete the whole circle rotation at one time, so that the circle drawing is interrupted, the compasses are easy to deviate, the drawn circle is irregular in size, and the appearance of students in the teaching process is poor.

In order to achieve the purpose, the invention provides the following technical scheme that the auxiliary teaching device for the mathematical education comprises a mounting frame, wherein two ends of the mounting frame are provided with abutting rods, a disc is rotatably connected to the mounting frame, and the abutting rods are parallel to the axis of the disc; a holding rod is eccentrically arranged on one side of the disc, which is far away from the abutting rod, a positioning column is coaxially fixed on the other side of the disc, the free end of the positioning column is flush with the free end of the abutting rod, a drawing rod is hinged on one side of the disc, which is provided with the positioning column, and the drawing rod is eccentrically hinged on the disc; the drawing rod comprises a positioning portion and a drawing portion, the positioning portion is hinged to the disc, a sliding groove is formed in one end, far away from the disc, of the positioning portion, the drawing portion is connected into the sliding groove in a sliding mode, a spring is arranged between the drawing portion and the sliding groove, and a chalk placing hole is formed in one end, far away from the positioning portion, of the drawing portion.

The technical principle of the technical scheme is as follows:

the abutting rod abuts against the blackboard, the drawing rod is rotated to the corresponding angle of the size to be drawn, the holding rod is held, the holding rod is rotated, the rotation of the disc can be achieved, and therefore the circle can be drawn on the blackboard. And set up the drawing pole into location portion and drawing portion, when the realization that can be better carries out angle modulation, the length of drawing pole changes, and then adapts to the drawing circle.

The beneficial effects of the technical scheme are as follows:

1. according to the technical scheme, the positioning columns are coaxially arranged on the disc, the drawing rod is eccentrically arranged on the disc, so that when the disc rotates, a circle with the positioning columns as the circle center and the rotation path of the drawing rod as the circumference can be drawn, and the operation is very convenient;

2. in the technical scheme, the holding rod is eccentrically arranged on the disc, the disc can be driven to rotate by holding the holding rod, the disc can be conveniently rotated, and the circle can be drawn at one time without interruption; compared with the prior art, the situation that the drawn circle is irregular due to the fact that the positioning column and the drawing rod are deviated in the rotating circle drawing process can be avoided;

3. according to the technical scheme, the drawing rod is arranged into the positioning part and the drawing part, and the drawing part and the positioning part can slide relatively through the arrangement of the spring, so that the drawing rod can stretch and retract, and circles with different sizes can be drawn conveniently;

4. in the technical scheme, the chalk placing hole is formed in the drawing part and can be used for fixing the chalk, and then the circle drawing is completed.

Furthermore, the free end of the positioning column is provided with a mounting hole.

Has the advantages that: the positioning column is provided with the mounting hole and can be used for placing chalk, so that the circle center can be determined after circle drawing is completed, and a reference point is provided when other lines are drawn.

Furthermore, the drawing device also comprises an adjusting rod which penetrates through the positioning column and is in threaded connection with the positioning column, the adjusting rod is perpendicular to the positioning column, and one end of the adjusting rod is abutted to the drawing rod.

Has the advantages that: through rotating the regulation pole, just can realize driving the drawing pole and remove, and then accomplish the setting of the angle of drawing pole, and then the completion sets up the size of the circle of drawing.

Further, the periphery of disc still is provided with the angle scale.

Has the advantages that: set up the angle scale, can carry out the angular surveying of circle, also can draw the angle skew lines according to actual demand.

Furthermore, the outer ring of the disc is also provided with an annular groove, and an angle ruler is rotationally connected in the annular groove.

Has the advantages that: through rotating the angle scale, can measure the angle to be convenient for draw lines.

Furthermore, the free ends of the abutting rods are fixed with suckers.

Has the advantages that: set up the sucking disc on supporting the tight pole, can fix supporting the tight pole on the blackboard to accomplish the fixed of mounting bracket, and then at the in-process that uses, the condition of skew can not appear, and then can reduce the probability that the irregular condition of circle of drawing appears.

Furthermore, a flow channel communicated with the sucker is arranged in the abutting rod, a through hole communicated with the flow channel is formed in the sucker, a communicating cavity communicated with the flow channel is formed in the mounting frame, a flow guide hole communicated with the outside is formed in the communicating cavity, and an opening and closing valve is arranged in the flow guide hole.

Has the advantages that: through the setting of runner and through-hole, can be when drawing, support tight pole and blackboard and support tightly, the gas between sucking disc and the blackboard this moment is extruded, discharges through-hole, runner, intercommunication chamber and water conservancy diversion hole, accomplishes the negative pressure to the sucking disc, and then the stable fixing on the blackboard of mounting bracket. When the device is taken down to needs, open the on-off valve, gaseous through the on-off valve through water conservancy diversion hole, intercommunication chamber, runner and through-hole get into the sucking disc in for sucking disc and blackboard loosen, and then the convenience is taken down the mounting bracket.

Further, the opening and closing valve comprises a conical cylinder fixed in the flow guide hole, a sealing ball is arranged in the conical cylinder, and the opening and closing valve further comprises a sealing rod connected in the flow guide hole in a sliding mode.

Has the advantages that: the sealing rod slides to extrude the sealing ball, so that the sealing ball seals the conical barrel, the sealing of the diversion hole is completed, the sucking disc and the outside are sealed, and the negative pressure of the sucking disc is completed. When the sealing rod slides to the time no longer supporting tight sealing ball, the cone is opened, so the sucking disc and the outside are communicated, and the outside gas can enter the sucking disc through the flow guide hole, the communication cavity, the flow channel and the through hole, and is loosened from the blackboard, so that the mounting frame can be taken down.

Furthermore, the turntable is connected to the mounting frame in a sliding mode along the axial direction of the turntable, a first magnetic block and a second magnetic block are fixed to the opposite ends of the two sealing rods respectively and attract each other, and the top surfaces of the two sealing rods are wedge surfaces.

Has the advantages that: when drawing, to blackboard direction removal carousel, the carousel extrudees the sealing rod for the sealing rod removes, supports the ball sealer tightly, and then accomplishes the negative pressure to the sucking disc. After the drawing is finished, the rotary table is not extruded any more, so that the force for extruding the sealing rod disappears, the force for extruding the sealing ball disappears, the sucker can be communicated with the outside, and the mounting frame can be conveniently taken down.

Further, still be provided with the length scale on the mounting bracket, still have the location chi along the direction sliding connection that sets up of length scale on the mounting bracket.

Has the advantages that: through set up length scale on the mounting bracket, can set up the diameter of the circle of drawing.

Drawings

FIG. 1 is a longitudinal sectional view of embodiment 1 of the present invention;

FIG. 2 is a top view of example 1 of the present invention;

FIG. 3 is a partial sectional view of embodiment 2 of the present invention;

fig. 4 is a schematic view of the matching of the turntable and the mounting rack in embodiment 2 of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the mounting rack 1, the transverse rod 11, the sliding groove 111, the positioning ruler 112, the screw rod 113, the diversion hole 114, the circular part 12, the rotation hole 121, the angle ruler 122, the convex ring 123, the abutting rod 2, the flow channel 21, the suction cup 22, the disc 3, the rotation groove 31, the limiting groove 32, the holding rod 33, the positioning column 4, the mounting hole 41, the drawing rod 5, the positioning part 51, the sliding groove 511, the drawing part 52, the anti-dropping rod 521, the placing hole 522, the adjusting rod 6, the sliding block 61, the conical cylinder 7, the sealing ball 71, the sealing rod 8, the rotating rod 9 and the limiting rod 91.

Example 1:

the utility model provides a mathematics teaching is with supplementary teaching device, is shown as attached figure 1 basically, includes mounting bracket 1, and the bottom at both ends all is fixed with the pole 2 that supports about mounting bracket 1. The mounting rack 1 comprises transverse rods 11 at two sides and a circular part 12 positioned between the two transverse rods 11, wherein a rotating hole 121 is coaxially arranged on the circular part 12, and the connecting disc 3 is rotatably arranged in the rotating hole 121.

The holding rod 33 is eccentrically fixed on the upper surface of the disc 3, the positioning column 4 is coaxially fixed on the lower surface of the disc 3, the bottom surface of the positioning column 4 is flush with the bottom surface of the abutting rod 2, the bottom surface of the positioning column 4 is coaxially provided with a mounting hole 41, and chalk can be inserted into the mounting hole 41. The lower surface of the disc 3 is also eccentrically hinged with a drawing rod 5, the drawing rod 5 comprises a positioning part 51 and a drawing part 52, and the top end of the positioning part 51 is hinged on the lower surface of the disc 3.

The bottom end of the positioning part 51 is provided with a vertical sliding groove 511, the sliding groove 511 is T-shaped, the top end of the drawing part 52 is vertically connected in the sliding groove 511 in a sliding manner, the top of the drawing part 52 is provided with an anti-falling rod 521, the anti-falling rod 521 is welded with a spring, and the top end of the spring is welded at the top end of the sliding groove 511; therefore, the sliding between the drawing part 52 and the positioning part 51 can be realized, and the length of the drawing rod 5 can be adjusted. The bottom end of the drawing portion 52 is coaxially provided with a chalk placing hole 522 for placing a chalk, thereby completing the circle drawing.

The upper portion of reference column 4 is equipped with horizontal screw hole, and threaded hole female connection has an adjusting rod 6, adjusts 6 perpendicular to reference column 4 of pole, and the left end of adjusting pole 6 is fixed with the piece of gripping, adjusts the articulated slider 61 of right-hand member of pole 6, and the vertical sliding connection of slider 61 is on the upper portion of location portion 51, can realize rotating adjusting pole 6, just accomplishes the angle change between drawing pole 5 and the reference column 4.

Combine as shown in fig. 2, disc 3 periphery is located circular portion 12 below department and is provided with the angle scale, and disc 3 periphery is located the below department of angle scale and is equipped with the ring channel, and the ring channel internal rotation is connected with angle ruler 122, and angle ruler 122 is the L type, and angle ruler 122's horizontal part rotates to be connected in the ring channel, angle ruler 122's vertical part's bottom with support tight 2 parallel and level of pole, angle ruler 122's horizontal part and vertical part hinge set up.

Still be provided with length scale on the transverse bar 11 on mounting bracket 1 right side, be provided with horizontal sliding tray 111 on the transverse bar 11 on mounting bracket 1 right side, horizontal sliding connection has location chi 112 in the sliding tray 111, and location chi 112 also is the L type, and the horizontal part and the sliding tray 111 sliding connection of location chi 112, the vertical part and the 2 parallel and level of tight pole of support of location chi 112. The positioning ruler device further comprises a fixed block fixed at the right end of the right transverse rod 11 and a screw rod 113 which penetrates through the fixed block and is rotatably connected with the fixed block, the screw rod 113 penetrates through the transverse part of the positioning ruler 112 and is in threaded connection with the transverse part of the positioning ruler 112, and the screw rod 113 can drive the positioning ruler 112 to move through rotating the screw rod 113.

The specific implementation process is as follows:

and (3) abutting the abutting rod 2 against the blackboard, abutting the positioning column 4 against the blackboard at the moment, centering through the chalk in the mounting groove on the positioning column 4, and determining the circle center of the drawn circle. The screw 113 is rotated to drive the positioning ruler 112 to move, after the positioning ruler 112 moves to a proper value, the adjusting rod 6 is rotated, so that the adjusting rod 6 pushes the drawing rod 5 to move towards a direction away from the positioning column 4, and after the bottom end of the drawing rod 5 abuts against the positioning ruler 112, the adjusting rod 6 stops rotating.

In the process that adjusting pole 6 drive drawing pole 5 removed, drawing pole 5 slopes gradually for just drawing portion 52 and the force of extrusion drawing portion 52 reduce, drawing portion 52 can draw spout 511 under the effect of spring, and then realizes drawing pole 5 extension, the drawing of the circle of being convenient for. The drawing rod 5 and the adjusting rod 6 are relatively fixed, so that the drawing rod 5 can be limited, and the situation that the drawing rod 5 is irregular in circle caused by angle deviation in the process of drawing a circle is avoided.

The rotation of the disc 3 can be realized by holding the holding rod 33 and rotating, and the drawing rod 5 is eccentrically arranged on the disc 3, so that a circle can be drawn on the blackboard through the drawing rod 5 when the disc 3 rotates. After the circle is drawn, some auxiliary lines are usually drawn, and angles can be marked by rotating the angle ruler 122, so that the drawing of the auxiliary lines is facilitated.

Example 2:

the difference between the embodiment 2 and the embodiment 1 is only that, as shown in fig. 3, in this embodiment, the suction cups 22 are fixed at the bottom ends of the two tightening rods 2, the middle portions of the suction cups 22 are provided with through holes, vertical flow channels 21 are arranged in the tightening rods 2, the flow channels 21 are communicated with the through holes, two flow guide holes 114 respectively communicated with the flow channels 21 are arranged in the transverse rods 11 of the mounting frame 1, and the bottom ends of the flow guide holes 114 penetrate through the bottom of the transverse rods 11 and are communicated with the outside.

An opening and closing valve is arranged in the transverse part of the flow guide hole 114 and comprises a conical cylinder 7, a sealing ball 71 and a sealing rod 8, the large-diameter end of the conical cylinder 7 faces the disc 3, and two ends of the conical cylinder 7 are both opened. The sealing ball 71 is arranged in the conical barrel 7, and the diameter of the sealing ball 71 is larger than the inner diameter of the small-diameter end of the conical barrel 7. The sealing rod 8 penetrates through the circular part 12 and is connected with the circular part 12 in a transverse sliding mode, one end of the sealing rod 8 is located in the transverse part of the diversion hole 114, the other end of the sealing rod 8 is located in the rotating hole 121, and the upper surface of the end, located in the rotating hole 121, of the sealing rod 8 is a wedge surface which inclines downwards along the middle part close to the rotating hole 121 and is shown in fig. 4. A spring is arranged between one end of the sealing rod 8 positioned in the diversion hole 114 and the sealing ball 71. The rotary hole 121 is provided with a convex ring 123 at the lower part of the sealing rod 8.

The right end of the left sealing rod 8 is fixed with a first magnetic block, the left end of the right sealing rod 8 is fixed with a second magnetic block, and the first magnetic block and the second magnetic block are mutually attracted.

The outer wall of the disc 3 is also provided with an annular rotating groove 31, and the disc 3 is also internally provided with a limiting groove 32 communicated with the top and the bottom of the rotating groove 31. Many dwangs 9 have evenly been arranged to the inner circle in rotation hole 121, and the quantity of dwang 9 sets up according to actual demand, sets up four dwang 9 in this embodiment. The one end that the hole 121 was rotated in keeping away from to dwang 9 all is located and rotates the inslot 31, and the one end that the hole 121 was rotated in keeping away from to dwang 9 all is fixed with vertical gag lever post 91, and dwang 9 is fixed at the middle part of gag lever post 91, and the spacing groove 32 of bottom can be slided into to the bottom of gag lever post 91, and the spacing inslot 32 at top can be slided into at the top of gag lever post 91.

The specific implementation process is as follows:

when placing mounting bracket 1, adjust the position of mounting bracket 1 earlier, extrude the pole 2 that supports again for supporting pole 2 and blackboard and supporting tightly, supporting the sucking disc 22 on the pole 2 this moment and being extruded, the gas in the sucking disc 22 is discharged through-hole, runner 21 and water conservancy diversion hole 114. After the position of the mounting frame 1 is determined, the disc 3 is moved towards the blackboard direction, the convex ring 123 on the disc 3 gradually extrudes the sealing rod 8, the sealing rod 8 further pushes the sealing ball 71 to slide towards the conical cylinder 7, the conical cylinder 7 is sealed, the negative pressure on the suction cup 22 is completed at the moment, the negative pressure on the suction cup 22 is further completed, the mounting frame 1 is tightly fixed on the blackboard, and the probability of the mounting frame 1 in the process of drawing circles in the case of deviation is reduced. After the mounting rack 1 is fixed, the screw 113 and the adjusting rod 6 are rotated to adjust the diameter of the circle to be drawn.

After the circle is drawn, the disc 3 is moved in the opposite direction of the blackboard, so that the convex ring 123 is separated from the sealing rods 8, the force for extruding the sealing rods 8 disappears, the two sealing rods 8 reset under the action of the spring and the mutual attraction of the first magnetic block and the second magnetic block, the flow guide hole 114 is opened, external gas enters the sucker 22 through the flow guide hole 114, the flow channel 21 and the same operator, the sucker 22 is separated from the blackboard, and the mounting frame 1 can be conveniently taken down.

It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention, and these changes and modifications should not be construed as affecting the performance of the invention and its practical application.

Claims

1. The utility model provides a mathematics teaching is with supplementary teaching device which characterized in that: the device comprises a mounting frame, wherein two ends of the mounting frame are provided with abutting rods, a disc is rotatably connected to the mounting frame, and the abutting rods are parallel to the axis of the disc; a holding rod is eccentrically arranged on one side of the disc, which is far away from the abutting rod, a positioning column is coaxially fixed on the other side of the disc, the free end of the positioning column is flush with the free end of the abutting rod, a drawing rod is hinged on one side of the disc, which is provided with the positioning column, and the drawing rod is eccentrically hinged on the disc; the drawing rod comprises a positioning portion and a drawing portion, the positioning portion is hinged to the disc, a sliding groove is formed in one end, far away from the disc, of the positioning portion, the drawing portion is connected into the sliding groove in a sliding mode, a spring is arranged between the drawing portion and the sliding groove, and a chalk placing hole is formed in one end, far away from the positioning portion, of the drawing portion.

2. An auxiliary teaching device for mathematical education as claimed in claim 1, wherein: the free end of the positioning column is provided with a mounting hole.

3. An auxiliary teaching device for mathematical education as claimed in claim 2, wherein: the drawing device is characterized by further comprising an adjusting rod penetrating through the positioning column and in threaded connection with the positioning column, the adjusting rod is perpendicular to the positioning column, and one end of the adjusting rod is abutted to the drawing rod.

4. An auxiliary teaching device for mathematical education as claimed in claim 3, wherein: the periphery of the disc is also provided with angle scales.

5. An auxiliary teaching device for mathematical education as claimed in claim 4, wherein: the outer ring of the disc is also provided with an annular groove, and an angle ruler is rotationally connected in the annular groove.

6. An auxiliary teaching apparatus for mathematical education as claimed in any one of claims 1 to 5, wherein: the free ends of the abutting rods are all fixed with suckers.

7. An auxiliary teaching device for mathematical education as claimed in claim 6, wherein: the abutting rod is internally provided with a flow passage communicated with the sucker, the sucker is provided with a through hole communicated with the flow passage, the mounting frame is provided with a communicating cavity communicated with the flow passage, the communicating cavity is provided with a flow guide hole communicated with the outside, and the flow guide hole is internally provided with an opening and closing valve.

8. An auxiliary teaching device for mathematical education as claimed in claim 7, wherein: the opening and closing valve comprises a conical cylinder fixed in the flow guide hole, a sealing ball is arranged in the conical cylinder, and the opening and closing valve further comprises a sealing rod connected in the flow guide hole in a sliding mode.

9. An auxiliary teaching device for mathematical education as claimed in claim 8, wherein: the rotary disc is connected to the mounting frame in a sliding mode along the axial direction of the rotary disc, a first magnetic block and a second magnetic block are fixed to the opposite ends of the two sealing rods respectively and attract each other, and the top surfaces of the two sealing rods are wedge surfaces.

10. An auxiliary teaching device for mathematical education as claimed in claim 9, wherein: still be provided with the length scale on the mounting bracket, still have the location chi along the direction sliding connection that sets up of length scale on the mounting bracket.