CN210535085U

CN210535085U - Function curve graph teaching board for high-number teaching

Info

Publication number: CN210535085U
Application number: CN201921490447.6U
Authority: CN
Inventors: 李繁春; 赵薇; 何超
Original assignee: Jiangxi College of Applied Technology
Current assignee: Jiangxi College of Applied Technology
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2020-05-15
Anticipated expiration: 2029-09-09

Abstract

The utility model discloses a function curve graph teaching board for high-count teaching, which belongs to the technical field of teaching tools and comprises a fixing frame and a teaching board, wherein two sides of the fixing frame are slidably connected with stand columns, a rotating shaft fixedly sleeved with a rotating gear and a reel is connected between the lower parts of the two stand columns, a rack is fixed at the bottom of the fixing frame, one end of the rotating shaft is provided with a locking hole, one side of the rotating shaft is fixedly provided with a limiting ring body, and a positioning rod is arranged in the limiting ring body in a penetrating way; the upper ends of the two upright posts are connected with an installation shaft, a fixed pulley is sleeved on the installation shaft, and a lifting rope on the winding wheel extends upwards to pass by the upper side of the fixed pulley and is fixed on the fixed frame; the locking groove has all been seted up to fixed frame upper and lower side, and teaching board upper end is fixed with the cardboard, and the locking inslot rotation is connected with the bar board, sets up the mouth of wearing that supplies the bar board to pass on the cardboard. The utility model discloses can adjust teaching board to arbitrary height, and can lock after the teaching board upset, can not unexpected upset, the result of application is better.

Description

Function curve graph teaching board for high-number teaching

Technical Field

The utility model relates to a teaching aid technical field, specificly relate to a function curve graph teaching board for high number teaching.

Background

For most mathematics students, high numbers are subjects difficult to learn, particularly functions in the high numbers, the subjects of the functions are abstract, difficult to imagine and difficult to understand intuitively, in order to enable students to learn the functions more intuitively, teachers mostly draw a curve graph of the high number functions on a teaching board to help students to understand better, but the height of the current teaching board cannot be adjusted, and the teaching board is not beneficial to learning of students in the back row.

The patent with the publication number of CN 208789345U discloses a function curve graph teaching board for high-count teaching, which comprises a base, a fixed loop bar is arranged on the top of the base, a rotating rod is vertically arranged in the inner cavity of the fixed loop bar, a driven bevel gear is arranged on the rotating rod, the right side of the driven bevel gear is meshed with a driving bevel gear, iron blocks are arranged on the top and the bottom of the teaching board, magnets are arranged on the inner walls of the top and the bottom of the fixed frame, the height of the teaching board for high-count teaching is convenient to adjust, the teaching board can be watched by students with different heights, the teaching efficiency is improved, when the teaching board needs to be turned over, only the upper side or the lower side of the teaching board needs to be pressed, when the pressing force is larger than the suction force between the magnets and the iron blocks, the magnets and the iron blocks are adsorbed again after the teaching board is turned over for 180 degrees, and the convenience and the stability of the use, the method is favorable for more intuitively mastering the function curve graph and is convenient for observation and learning. However, it has the following problems: firstly, the teaching board is moved to a proper height through the lifting movement of the moving block, then bolts are sequentially inserted into the round holes of the fixed loop bar and the blind holes of the moving block, so that the height of the moving block is fixed, a plurality of round holes need to be formed in the fixed loop bar in advance, accordingly, the moving block can only be fixed at the corresponding height of the round holes, and cannot be fixed at any continuous height, so that the teaching board cannot be adjusted to any height within an allowable range, and the application effect is poor; two, realize the fixed of teaching board through the mating reaction of magnet and iron plate between teaching board and the fixed frame, in case the power of colliding with on the teaching board is greater than the magnetic attraction between magnet and the iron plate, will lead to the teaching board to take place the upset, and its stability of application is relatively poor.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide a function curve graph teaching board for high number teaching, it can adjust the arbitrary height of teaching board to the allowed range, and can lock after the teaching board upset, even apply great power on the teaching board and can not drive the upset of teaching board yet, and the result of application is better.

2. Technical scheme

In order to solve the above problem, the utility model adopts the following technical scheme:

a function curve graph teaching board for high-count teaching comprises a fixed frame and a teaching board arranged on the inner side of the fixed frame, wherein a rotating shaft penetrates through the horizontal center line of the teaching board, and a mounting groove for mounting the rotating shaft is formed in the corresponding side of the end part of the fixed frame corresponding to the rotating shaft; the left side and the right side of the fixing frame are respectively provided with a vertically arranged upright post, the bottom of the upright post is fixed with a base which is supported on the ground, the upright post is provided with a slide rail which is used for the corresponding side of the fixing frame to slide up and down, a rotating shaft which is positioned below the slide rail and is horizontally arranged is arranged between the two upright posts, the two ends of the rotating shaft are respectively and fixedly connected on the front surface of the upright post through a bearing, the two ends of the rotating shaft are respectively and fixedly sleeved with a rotating gear and a winding wheel which is positioned on one side of the rotating gear, the two sides of the bottom of the fixing frame are respectively and fixedly provided with a rack which vertically extends downwards and is meshed with one side of the corresponding rotating gear, an installation shaft which is positioned above the fixing frame is fixedly connected between the upper ends of the two upright posts, the lifting rope extends upwards from the rear side of the fixed frame and bypasses the fixed pulley from the upper side of the fixed pulley of the corresponding side to be finally fixed on the junction block of the side; a limiting ring body fixed on the stand column is coaxially arranged on one side of the bearing, which is opposite to the rotating gear, on one side, a limiting through hole is formed in the center of the limiting ring body, a positioning rod axially penetrates through the limiting through hole, an end face, facing the limiting ring body, of the rotating shaft is provided with an inwards concave positioning hole, outer gear teeth are uniformly distributed on the outer surface of the positioning rod along the circumference of the positioning rod, inner gear teeth clamped with the outer gear teeth are uniformly distributed on the side walls of the limiting through hole and the positioning hole, and the length of the positioning rod is greater than the distance between the positioning hole and the back;

the utility model discloses a teaching board, including fixed frame, fixed short axis cover, fixed frame.

Furthermore, a handle is fixed at the outer side end of the positioning rod. The positioning rod can be operated conveniently through the handle.

Furthermore, a coordinate system is arranged on the rear side face of the teaching board, and scales are arranged on the coordinate system. The graduated coordinate system is the basis for plotting the function graph, which facilitates plotting the function graph.

Furthermore, the back side of the teaching board is provided with grid lines. The grid lines facilitate the rapid determination of the coordinates of the corresponding coordinate system somewhere on the plane, thereby facilitating the drawing of the function curve graph.

3. Advantageous effects

(1) The utility model discloses there is the stand fixed frame both sides sliding connection, be connected with the axis of rotation that the level set up through the bearing between two stand belows, the fixed coupling has the rolling gear in the axis of rotation, fixed frame bottom is fixed with the rack with the rolling gear meshing, the locking hole has been seted up to the one end of axis of rotation, be fixed with spacing ring body on the corresponding stand, the locating lever is worn to be equipped with to the internal axial of spacing ring, the locating hole outside is equipped with outer teeth of a cogwheel, locating hole and spacing ring body inboard all are equipped with the interior teeth of a cog. Adjust the height of teaching board, the fixed frame of manual pulling reciprocates along the stand, the rack removes thereupon, can drive the rotating gear and rotate, when the teaching board removes to suitable height, pass spacing ring body with the locating lever and insert in the locating hole, block effect through the interior teeth of a cogwheel and the outer teeth of a cogwheel, because spacing ring body is fixed motionless, make the axis of rotation can not rotate, thereby rotating gear can not rotate, the rack can not remove, realize the locking to teaching board high position promptly, then fixed frame lockable is at the arbitrary height of slide rail, the teaching board can be adjusted and the locking is at arbitrary height promptly.

(2) The utility model discloses a still fixed cover is equipped with the reel in the axis of rotation, is connected with the installation axle between the upper end of two stands, and installation epaxial clearance type cover is equipped with the fixed pulley, and the winding has the lifting rope on the reel, and this lifting rope extends from fixed frame rear side to the top and walks around finally to fix on fixed frame from the fixed pulley upside. When the axis of rotation rotated, the reel rotated thereupon, tightened up or loosened the lifting rope, satisfied fixed frame and reciprocated the demand to the lifting rope, at the lift in-process of teaching board, the lifting rope was in taut state all the time, can balance the gravity of teaching board and fixed frame to can effectively protect rack and rotating gear when the arbitrary height at the locking of teaching board.

(3) The utility model discloses a locking groove has all been seted up to the upper and lower side of fixed frame, and the upper end of teaching board is fixed with can the card go into the cardboard of locking inslot, and the fixed minor axis of locking inslot fixedly connected with rotates on the fixed minor axis and is connected with the bar shaped plate, sets up the mouth of wearing that supplies the bar shaped plate to pass on the cardboard. In application, when the front side surface of the teaching board faces forwards, the clamping board is positioned in the locking groove on the upper side, and the strip-shaped plate in the locking groove is rotated to a position vertical to the through opening, so that the clamping board cannot be separated from the locking groove; when the trailing flank with the teaching board was forward, the cardboard was located the locking groove of downside, rotated the position that the mouth was worn to this bar shaped plate in the locking groove to the perpendicular to, and the cardboard just can not break away from the locking groove. Even if a large force is applied to the teaching board, the teaching board is not driven to turn over.

To sum up, the utility model discloses can adjust the arbitrary height of teaching board to the allowed range, and can lock after the teaching board upset, even apply great power on the teaching board and can not drive the upset of teaching board yet, the result of application is better.

Drawings

Fig. 1 is a schematic structural view of the teaching board 2 of the present invention when the front side faces forward;

FIG. 2 is an enlarged view of the structure of the area A in FIG. 1;

FIG. 3 is a side view of the positioning rod 19;

FIG. 4 is a side view of the rotating shaft 8 at the end where the positioning hole 20 is located;

FIG. 5 is a schematic view of the mounting member in the locking slot 23;

fig. 6 is a schematic structural view of the teaching board 2 when the rear side faces forward.

Reference numerals: 1. a fixing frame; 2. a teaching board; 3. a rotating shaft; 4. mounting grooves; 5. a column; 6. a base; 7. a slide rail; 8. a rotating shaft; 9. a bearing; 10. a rotating gear; 11. a reel; 12. a rack; 13. installing a shaft; 14. a fixed pulley; 15. a junction block; 16. a lifting rope; 17. a limiting ring body; 18. a limiting through hole; 19. positioning a rod; 20. positioning holes; 21. outer gear teeth; 22. inner gear teeth; 23. a locking groove; 24. clamping a plate; 25. fixing the short shaft; 26. a sleeve cover; 27. a strip plate; 28. perforating; 29. a handle; 30. a coordinate system; 31. and (4) grid lines.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Examples

As shown in fig. 1, the function curve graph teaching board for high-count teaching comprises a fixed frame 1 and a teaching board 2 installed inside the fixed frame 1, wherein a rotating shaft 3 penetrates through a horizontal center line of the teaching board 2, and an installation groove 4 for installing the rotating shaft 3 is formed in the fixed frame 1 corresponding to a corresponding side of an end portion of the rotating shaft 3; the left side and the right side of the fixed frame 1 are respectively provided with a vertical upright post 5, the bottom of the upright post 5 is fixed with a base 6 supported on the ground, the upright post 5 is provided with a slide rail 7 for the corresponding side of the fixed frame 1 to slide up and down, a rotating shaft 8 which is positioned below the slide rail 7 and horizontally arranged is arranged between the two upright posts 5, as shown in figure 2, two ends of the rotating shaft 8 are respectively and fixedly connected on the front of the upright post 5 through bearings 9, two ends of the rotating shaft 8 are respectively and fixedly sleeved with a rotating gear 10 and a reel 11 positioned on one side of the rotating gear 10, two sides of the bottom of the fixed frame 1 are respectively and fixedly provided with a rack 12 which vertically extends downwards and is meshed with one side of the corresponding rotating gear 10, an installation shaft 13 positioned above the fixed frame 1 is fixedly connected between the upper ends of the two upright, the two sides of the top of the fixed frame 1 are both fixed with junction blocks 15, the reels 11 are wound with lifting ropes 16, the lifting ropes 16 extend upwards from the rear side of the fixed frame 1 and pass through the fixed pulleys 14 from the upper sides of the fixed pulleys 14 on the corresponding sides to be finally fixed on the junction blocks 15 on the sides; a limiting ring body 17 fixed on the upright post 5 is coaxially arranged on one side of the bearing 9, which is opposite to the rotating gear 10, on one side, a limiting through hole 18 is formed in the center of the limiting ring body 17, a positioning rod 19 axially penetrates through the limiting through hole 18, an inward-concave positioning hole 20 is formed in the end face, facing the limiting ring body 17, of the rotating shaft 8, as shown in fig. 3, outer gear teeth 21 are uniformly distributed on the outer surface of the positioning rod 19 along the circumference of the positioning rod, as shown in fig. 4, inner gear teeth 22 clamped with the outer gear teeth 21 are uniformly distributed on the side walls of the limiting through hole 18 and the positioning hole 20, and the length of the positioning rod 19 is greater than the distance between the positioning hole 20;

the utility model discloses a teaching board, including fixed frame 1, fixed frame, clamping plate 23, strip-shaped plate 27, mouth 28, fixed short shaft cover 26, fixed strip-shaped plate 27, the mouth 28 that wears that can supply strip-shaped plate 27 and sleeve cover 26 to pass is seted up to the inboard middle part of the positive last downside of fixed frame 1 all seted up the unanimous locking groove 23 of specification, and the side in opposite directions of two locking grooves 23 is all uncovered, the upside middle part of teaching board 2 is fixed with the cardboard 24 with locking groove 23 looks adaptation, as shown in figure 5, locking groove 23 internal fixation has the fixed short shaft 25 that extends forward, the cover is equipped with sleeve cover 26 on the fixed short shaft 25, be fixed with strip-shaped plate 27 on the outside terminal surface of sleeve cover 26, set up the mouth 28 that wears that can supply strip-shaped plate 27 and sleeve cover 26 to pass on the cardboard 24, the thickness of cardboard 24 is less.

In this embodiment, a handle 29 is fixed to an outer end of the positioning rod 19. The positioning rod 19 can be operated conveniently by the handle 29.

In the present embodiment, as shown in fig. 6, a coordinate system 30 is provided on the rear side surface of the teaching board 2, and a scale (the scale is not shown in fig. 6) is provided on the coordinate system 30. The graduated coordinate system 30 is the basis for plotting the function graph, which facilitates plotting the function graph.

In the present embodiment, as shown in fig. 6, the teaching board 2 has grid lines 31 distributed on the rear side. The grid lines 31 facilitate a faster determination of the coordinates of the corresponding coordinate system 30 somewhere on the plane, thereby facilitating the plotting of the function graph.

The specific application process comprises the following steps:

when the height of the teaching board 2 is adjusted, the positioning rod 19 is pulled out of the positioning hole 20, the fixing frame 1 is manually pulled to move up and down along the slide rail 7, the rack 12 moves along with the movement of the positioning rod, the rotating gear 10 is driven to rotate, when the teaching board 2 moves to a proper height, the positioning rod 19 is inserted into the limiting through hole 18 and the positioning hole 20 in sequence, the inner wheel teeth 22 in the limiting through hole 18 are clamped with the outer wheel teeth 21 on the positioning rod 19, and the limiting ring body 17 is fixed, so that the positioning rod 19 can not rotate, meanwhile, the inner gear teeth 22 in the positioning holes 20 are engaged with the outer gear teeth 21 on the positioning rods 19, so that the rotation shaft 8, and thus the rotation gear 10, cannot be rotated, the rack 12 cannot be moved, namely, the height position of the teaching board 2 is locked, the fixing frame 1 can be locked at any height of the sliding rail 7, namely, the teaching board 2 can be adjusted and locked at any height;

in the process, under the action of the gravity of the teaching board 2 and the fixed frame 1, the rack 12 and the meshing teeth of the rotating gear 10 are abraded greatly, in order to solve the problem, the rotating teeth rotate to drive the rotating shaft 8 and the reel 11 to rotate, the reel 11 tightens or loosens the lifting rope 16, the requirement of the fixed frame 1 on the lifting rope 16 due to up-and-down movement is met, according to the analysis of the attached drawings, when the rack 12 moves downwards, the driving gear rotates clockwise, the reel 11 rotates along with the rotation, the lifting rope 16 is loosened, and the part of the lifting rope 16 positioned on the front side of the fixed pulley 14 is pulled by the fixed frame 1 to move downwards, so that the lifting rope 16 is in a tensioned state; when the rack 12 moves upwards, the driving gear rotates anticlockwise, the reel 11 rotates along with the rack, the lifting rope 16 is wound, the part of the lifting rope 16 positioned on the front side of the fixed pulley 14 moves upwards, the process that the fixed frame 1 moves upwards is met, the lifting rope 16 is maintained in a tensioning state, namely in the adjusting process of the teaching board 2, the lifting rope 16 is always in the tensioning state, the gravity of the teaching board 2 and the fixed frame 1 can be balanced, and therefore the rack 12 and the rotating gear 10 can be effectively protected;

the front side surface of the teaching board 2 is applied when teaching does not need to draw the content of a function curve graph, at the moment, the clamping board 24 is positioned in the locking groove 23 on the upper side of the fixed frame 1, after the penetrating opening penetrates through the strip-shaped board 27 in the locking groove 23, the strip-shaped board 27 is twisted to a position vertical to the penetrating opening, the teaching board 2 is stably positioned in a state that the front side surface is forward, and even if a large force is applied to the teaching board 2, the teaching board 2 cannot be driven to turn over; the back side of teaching board 2 is used when the teaching needs to draw the content of function curve graph, when will teaching board 2's back side overturn to forward, make the strip 27 that is located the top rotate to the position that is on a parallel with the through hole, cardboard 24 just can pass strip 27 and break away from the locking groove 23 of top, then make teaching board 2 revolve the rotation of axis 3 central line 180, at this moment, cardboard 24 blocks in the locking groove 23 of fixed frame 1 downside, and the through hole passes strip 27 in this locking groove 23, twist this strip 27 of commentaries on classics again to the position that is perpendicular to the through hole, then teaching board 2 stably is located the state that the back side is forward, even exert great power on teaching board 2, also can not drive teaching board 2 upset.

According to the above, the utility model discloses can adjust the arbitrary height of teaching board to the allowed range, and can lock after the teaching board upset, even apply great power on the teaching board and can not drive the upset of teaching board yet, the result of application is better.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims

1. A function curve graph teaching board for high-count teaching comprises a fixed frame (1) and a teaching board (2) installed on the inner side of the fixed frame (1), wherein a rotating shaft (3) penetrates through the horizontal center line of the teaching board (2), and a mounting groove (4) for mounting the rotating shaft (3) is formed in the corresponding side of the end part of the fixed frame (1) corresponding to the rotating shaft (3); the fixing frame is characterized in that the left side and the right side of the fixing frame (1) are respectively provided with a vertical column (5), the bottom of the column (5) is fixedly provided with a base (6) which is supported on the ground, the column (5) is provided with a slide rail (7) which is used for the corresponding side of the fixing frame (1) to slide up and down, two columns (5) are provided with a rotating shaft (8) which is positioned below the slide rail (7) and is horizontally arranged, the two ends of the rotating shaft (8) are respectively and fixedly connected on the front of the column (5) through bearings (9), the two ends of the rotating shaft (8) are respectively and fixedly sleeved with a rotating gear (10) and a reel (11) which is positioned on one side of the rotating gear (10), the two sides of the bottom of the fixing frame (1) are respectively and fixedly provided with a rack (12) which vertically extends downwards and is meshed on one side of the corresponding rotating gear (10), and an installation shaft, fixed pulleys (14) are sleeved at two ends of the mounting shaft (13) in a clearance manner, wiring blocks (15) are fixed at two sides of the top of the fixed frame (1), a lifting rope (16) is wound on the reel (11), the lifting rope (16) extends upwards from the rear side of the fixed frame (1), bypasses the fixed pulleys (14) from the upper sides of the fixed pulleys (14) at the corresponding sides, and is finally fixed on the wiring blocks (15) at the corresponding sides; one side of the bearing (9) on one side, which is opposite to the rotating gear (10), is coaxially provided with a limiting ring body (17) fixed on the upright post (5), the center of the limiting ring body (17) is provided with a limiting through hole (18), a positioning rod (19) axially penetrates through the limiting through hole (18), one end face, facing the limiting ring body (17), of the rotating shaft (8) is provided with an inwards concave positioning hole (20), outer gear teeth (21) are uniformly distributed on the outer surface of the positioning rod (19) along the periphery of the positioning rod, inner gear teeth (22) clamped with the outer gear teeth (21) are uniformly distributed on the side walls of the limiting through hole (18) and the positioning hole (20), and the length of the positioning rod (19) is greater than the distance between the positioning hole (20) and the opposite side of the limiting;

the middle parts of the upper side and the lower side of the front surface of the fixed frame (1) are respectively provided with a locking groove (23) with the same specification, the opposite sides of the two locking grooves (23) are both open, a clamping plate (24) matched with the locking groove (23) is fixed in the middle of the upper side of the teaching plate (2), a fixed short shaft (25) extending forwards is fixed in the locking groove (23), a sleeve cover (26) is sleeved on the fixed short shaft (25), a strip-shaped plate (27) is fixed on the end face of the outer side of the sleeve cover (26), a through opening (28) through which the strip-shaped plate (27) and the sleeve cover (26) can pass is arranged on the clamping plate (24), the thickness of the clamping plate (24) is smaller than the distance between one side of the strip-shaped plate (27) connected with the sleeve cover (26) and the fixed end of the fixed short shaft (25), the distance between one side of the strip-shaped plate (27) connected with the sleeve cover (26) and the fixed end of the fixed short shaft (25) is larger than the depth of the locking groove (23).

2. The function graph teaching board for teaching high numbers according to claim 1, wherein a handle (29) is fixed to the outer end of the positioning rod (19).

3. The high-order teaching function graph teaching board as claimed in claim 1, wherein a coordinate system (30) is provided on the back side of the teaching board (2), and scales are provided on the coordinate system.

4. A high-count teaching aid as claimed in claim 1 or 3, wherein the teaching board (2) is provided with grid lines (31) on its rear side.