CN109664651B - Teaching aid for advanced mathematics - Google Patents

Abstract

The invention discloses a teaching aid for advanced mathematics, comprising a main blackboard assembly, a left slider assembly, a right slider assembly and an auxiliary blackboard assembly. Trapezoidal guide bars are fixedly connected to the front and rear ends of the bottom plate in the main blackboard assembly. The middle position is fixedly connected with two hinged supports I, the lower end of the oblique rod is hinged between the two hinged supports I, the upper end of the oblique rod is fixedly connected with a guide column, and the front and rear ends of the left slider are slidably connected to the front and rear two respectively. The left ends of the two trapezoidal guide bars, the front and rear ends of the upper end of the left slide bar are fixedly connected with hinged supports II; The front and rear ends are fixedly connected with hinged supports III. The lower end of the bottom plate can be used as the main blackboard. The left and right sub-blackboards can be lifted to a tilted state for teachers to write. The bottom plate can rotate around the axis of the central axis. It is convenient to show students what is on the right and left blackboards.

Description

A teaching aid for advanced mathematics

technical field

The invention relates to a teaching aid, in particular to a teaching aid for advanced mathematics.

Background technique

A movable blackboard with a blackboard eraser is disclosed in Chinese patent CN201320050531.2. The invention relates to a movable blackboard with a blackboard eraser. The blackboard frame includes an outer frame and an inner frame, and the inner side of the outer frame is provided with a chute , the inner frame is a racetrack-shaped gear slot; there are three blackboard bodies, each blackboard body is provided with flanges that cooperate with the chute, the back of each blackboard body is equipped with a gear that cooperates with the gear slot, and each blackboard The body can slide along the racetrack-shaped gear groove; the three blackboard bodies are installed on the blackboard frame, and an empty board position is formed on the blackboard frame; the right side and the lower side of the empty board position are respectively provided with a long strip of blackboard eraser; The blackboard eraser is installed at the empty board position through the telescopic rod. When the telescopic rod is fully retracted, the bottom plane of the blackboard eraser and the upper plane of the blackboard body are on the same plane, and the writing on the blackboard can be wiped. When the telescopic rod is opened, the blackboard The distance between the bottom plane of the eraser and the upper plane of the blackboard body is 10-20mm, so that the user can move the blackboard body at will, and can set whether to erase the handwriting. However, only one side of the blackboard can be used in this invention. Because there are many formulas in mathematics teaching, the blackboard cannot be used by teachers to classify and write the content of mathematics teaching, the space utilization rate of the blackboard is low, and the blackboard is not easy to move.

SUMMARY OF THE INVENTION

The purpose of the invention is to provide a teaching aid for advanced mathematics to solve the problems raised in the above-mentioned background art.

In order to achieve the above purpose, the invention provides the following technical scheme: a teaching aid for advanced mathematics, comprising a main blackboard assembly, a left slider assembly, a right slider assembly and a sub-blackboard assembly, the main blackboard assembly includes a bottom plate, a trapezoidal guide bar, The hinged support I, the oblique rod and the guide column, the front and rear ends of the bottom plate are fixedly connected with the trapezoidal guide bar along its length direction, and the middle position of the rear end of the bottom plate is fixedly connected with two of the hinged supports I , the lower end of the inclined rod is hinged between the two hinged supports I, and the upper end of the inclined rod is fixedly connected with the guide column;

The left slider assembly includes a left slider and a hinged support II, the front and rear ends of the left slider are slidably connected to the left ends of the front and rear two trapezoidal guide bars, respectively, and the front and rear ends of the upper end of the left slider are slidably connected. Both are fixedly connected with the hinged support II;

The right slide bar assembly includes a right slide bar and a hinged support III. The front and rear ends of the right slide bar are respectively slidably connected to the right ends of the front and rear trapezoidal guide bars. Both ends are fixedly connected with the hinged support III;

The sub-blackboard assembly includes a top plate, a slide rail, a right sub-blackboard, a bar-shaped hole and a left sub-blackboard, the bar-shaped hole is provided in the middle of the top plate, and the front end of the bar-shaped hole is open and the rear end is closed, so The upper end of the top plate is symmetrically provided with two sliding rails, and the two sliding rails are symmetrically arranged on the left and right sides of the strip hole respectively. The lower end of the left sub-blackboard is hinged between the two hinge supports II, the upper end of the right sub-blackboard is hinged to the right end of the top plate, and the lower end of the right sub-blackboard is hinged to the two hinge supports Between III, the upper end of the inclined rod passes through the bar-shaped hole, and the left and right ends of the guide column are respectively slidably connected to the two sliding rails.

Preferably, the main blackboard assembly further comprises a rectangular board, a handle, a central axis, a ring and a ball, the front end of the bottom plate is fixedly connected with the rectangular board, and the side surface of the rectangular board is fixedly connected with the lift Hand, the four corners of the lower end surface of the bottom plate are fixedly connected with the ball, the center of the lower end surface of the bottom plate is fixedly connected with the central axis, the lower end of the central axis is fixedly connected with a bearing, and the inner part of the bearing is fixedly connected. The ring is fixedly connected to the central shaft, and the outer ring of the bearing is fixedly connected to the inner ring of the annular ring.

Preferably, the left slider assembly further includes a limit ring, a fixed seat plate and an adjustment screw, the fixed seat plate is fixedly connected to the left end of the bottom plate, and the left end of the adjustment screw is inserted into the fixed seat with clearance fit On the plate, the left end of the adjustment screw is fixedly connected with two limit rings, the two limit rings are respectively attached to the left and right ends of the fixed seat plate, and the right end of the adjustment screw passes through the The left slider is described and connected with the left slider.

Preferably, the left and right sides of the inclined rod are respectively attached to the left and right sides of the strip hole.

Preferably, the right auxiliary blackboard and the left auxiliary blackboard have the same structural size, and are symmetrically arranged along the center line of the strip hole.

Compared with the prior art, the beneficial effects of the invention are:

1. The teaching aids for higher mathematics are fixedly connected with trapezoidal guide strips through the front and rear ends of the bottom plate, two hinged supports I are fixedly connected in the middle of the bottom plate, and the lower end of the inclined rod is hinged between the two hinged supports I. The upper end of the inclined rod is fixedly connected with a guide column, the front and rear ends of the left slider are slidably connected to the left ends of the two front and rear trapezoidal guide bars, and the front and rear ends of the upper end of the left slider are fixedly connected with a hinged support II; The front and rear ends of the slider are slidably connected to the right ends of the front and rear two trapezoidal guide bars, respectively, and the front and rear ends of the upper end of the right slider are fixedly connected with a hinged support III, so that the right slider can be left and right on the two trapezoidal guide bars. Sliding, the left slider can slide left and right on the two trapezoidal guide bars, the lower end surface of the bottom plate can be used as the main blackboard, and the two trapezoidal guide bars on the bottom plate are used for the left and right slide bars to slide. The lower end can be rotated on two hinged supports I;

2. The teaching aids for advanced mathematics are provided with a strip hole through the middle of the top plate. The front end of the strip hole is open and the back end is closed. The upper end of the top plate is symmetrically provided with two slide rails with long strip holes. The rails are located on the left and right sides of the strip hole, the upper end of the left sub-blackboard is hinged to the left end of the top plate, the lower end of the left sub-blackboard is hinged between the two hinge supports II, the upper end of the right sub-blackboard is hinged to the right end of the top plate, and the right The lower end of the auxiliary blackboard is hinged between the two hinged supports III, the upper end of the inclined rod passes through the bar hole, and the left and right ends of the guide column are slidably connected to the two slide rails, so that when the left slide bar moves to the right, The left sub-blackboard will rotate counterclockwise around the hinge axis of the hinged support II, and the center of the hinged axis of the left sub-blackboard and the hinged support II is higher than the center of the adjusting screw, so that the left and right sub-blackboards are placed horizontally. There will be no dead point when the top plate is lifted up, so that the top plate can be smoothly lifted upwards. When the left auxiliary blackboard is lifted upwards, the guide column can slide in the elongated holes of the two slide rails, and the top plate drives the inclined rod to rotate upward, so that the right auxiliary blackboard can be moved upwards. The blackboard will rotate clockwise around its hinge axis with the hinged support III. At this time, both the left sub-blackboard and the right sub-blackboard will be lifted up and become inclined. At this time, the bottom plate will be placed flat on the lectern, and the teacher will use the left sub-blackboard and Write on the right sub-blackboard; if the left slider is moved to the left to the end, the top plate, right sub-blackboard and left sub-blackboard will be placed horizontally above the bottom plate to form a flat plate, at this time, the lower surface of the bottom plate can be used as the main blackboard;

3. The teaching aid for higher mathematics is fixedly connected with a rectangular plate through the front end of the bottom plate, the upper end of the rectangular plate is fixedly connected with a handle, the four corners of the lower end surface of the bottom plate are fixedly connected with balls, and the center of the lower end surface of the bottom plate is fixed A central shaft is connected, the lower end of the central shaft is fixedly connected with a bearing, the inner ring of the bearing is fixedly connected with the central shaft, and the outer ring of the bearing is fixedly connected to the inner ring of the ring, so that the handle can easily lift the present invention. When using the right sub-blackboard and left sub-blackboard, place the bottom plate flat on the podium, then the ring is in contact with the podium, and the four balls are also in contact with the podium. The axis rotates to facilitate switching between the right sub-blackboard and the left sub-blackboard. The right and left sub-blackboards are facing the students, and the four balls are in contact with the podium to reduce friction;

4. When using the lower end face of the bottom plate as the main blackboard for the teaching aids for higher mathematics, the present invention can be hung on the classroom wall by hanging the handle on the nail on the wall;

5. The teaching aid for advanced mathematics is fixedly connected to the left end of the bottom plate through the fixed seat plate, the left end of the adjusting screw is inserted into the fixed seat plate with clearance fit, and the left end of the adjusting screw is fixedly connected with two limit rings, two limit rings. The rings fit with the left and right ends of the fixed seat plate respectively, and the right end of the adjustment screw is matched with the left slider through the thread, so that rotating the adjustment screw can drive the left slider to move left and right. The function of the two limit rings is to prevent the adjustment screw Move left and right relative to the fixed seat plate.

Description of drawings

1 is a schematic structural diagram one of a kind of teaching aids for advanced mathematics provided by an embodiment of the present invention;

2 is a schematic structural diagram two of a kind of teaching aid for advanced mathematics provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram 1 of the main blackboard assembly;

FIG. 4 is a second schematic diagram of the structure of the main blackboard assembly;

5 is a schematic structural diagram of a left slider assembly;

6 is a schematic structural diagram of a right slider assembly;

FIG. 7 is a schematic structural diagram 1 of the sub-blackboard assembly;

FIG. 8 is a second structural schematic diagram of the sub-blackboard assembly.

In the figure: main blackboard assembly 1; bottom plate 1-1; trapezoidal guide strip 1-2; hinged support I1-3; inclined rod 1-4; guide column 1-5; rectangular plate 1-6; handle 1-7 ; Left slider assembly 2; Left slider 2-1; Hinged support II2-2; Limit ring 2-3; Fixed seat plate 2-4; Adjustment screw 2-5; Right slider assembly 3; Right slider 3-1; hinged support III3-2; sub-blackboard assembly 4; top plate 4-1; slide rail 4-2; right sub-blackboard 4-3; strip hole 4-4; left sub-blackboard 4-5.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-8, the invention provides a technical solution: a teaching aid for advanced mathematics, comprising a main blackboard assembly 1, a left slider assembly 2, a right slider assembly 3 and a sub-blackboard assembly 4, the main blackboard assembly 1 includes a bottom plate 1-1, a trapezoidal guide strip 1-2, a hinged support I1-3, an inclined rod 1-4 and a guide column 1-5, and the front and rear ends of the bottom plate 1-1 are fixedly connected along its length direction. There is the trapezoidal guide bar 1-2, and two hinged supports I1-3 are fixedly connected to the middle position of the rear end of the bottom plate 1-1, and the two hinged supports I1-3 are located at the middle of the trapezoidal guide bar 1-2. In this way, the normal rotation of the inclined rod 1-4 can be ensured, the lower end of the inclined rod 1-4 is hinged between the two hinge supports I1-3, and the upper end of the inclined rod 1-4 is fixedly connected with a the guide posts 1-5;

The left slider assembly 2 includes a left slider 2-1 and a hinged support II2-2. The front and rear ends of the left slider 2-1 are respectively slidably connected to the front and rear of the two trapezoidal guide bars 1-2. On the left end, the front and rear ends of the upper end of the left slider 2-1 are fixedly connected with the hinged support II2-2;

The right slider assembly 3 includes a right slider 3-1 and a hinged support III3-2. The front and rear ends of the right slider 3-1 are respectively slidably connected to the front and rear of the two trapezoidal guide bars 1-2. On the right end, the front and rear ends of the upper end surface of the right slider 3-1 are fixedly connected with the hinged support III3-2;

The sub-blackboard assembly 4 includes a top plate 4-1, a slide rail 4-2, a right sub-blackboard 4-3, a strip hole 4-4 and a left sub-blackboard 4-5. The bar-shaped hole 4-4 has an open front end and a closed rear end of the bar-shaped hole 4-4. The upper end of the top plate 4-1 is symmetrically provided with two sliding rails 4-2. The rails 4-2 are symmetrically arranged on the left and right sides of the strip hole 4-4, the upper end of the left sub-blackboard 4-5 is hinged to the left end of the top plate 4-1, and the left sub-blackboard 4-5 The lower end is hinged between the two hinge supports II2-2, the upper end of the right sub blackboard 4-3 is hinged on the right end of the top plate 4-1, and the lower end of the right sub blackboard 4-3 is hinged on the Between the two hinge supports III3-2, the upper end of the inclined rod 1-4 passes through the strip hole 4-4, and the left and right ends of the guide column 1-5 are slidably connected to the two on the slide rail 4-2.

The main blackboard assembly 1 further includes a rectangular plate 1-6, a handle 1-7, a central axis 1-8, a ring 1-9 and a ball 1-10, and the front end of the bottom plate 1-1 is fixedly connected with a For the rectangular plate 1-6, the handle 1-7 is fixedly connected to the side of the rectangular plate 1-6, and the ball 1-7 is fixedly connected to the four corners of the lower end surface of the bottom plate 1-1. 10. The central axis 1-8 is fixedly connected to the center of the lower end surface of the bottom plate 1-1, the lower end of the central axis 1-8 is fixedly connected to a bearing, and the inner ring of the bearing is fixed to the central axis 1-8 Connection, the outer ring of the bearing is fixedly connected to the inner ring of the ring 1-9.

The left slider assembly 2 further includes a limit ring 2-3, a fixed seat plate 2-4 and an adjustment screw 2-5. The fixed seat plate 2-4 is fixedly connected to the left end of the bottom plate 1-1, so the The left end of the adjusting screw 2-5 is inserted into the fixing seat plate 2-4 in a clearance fit, and the left end of the adjusting screw 2-5 is fixedly connected with the two limiting rings 2-3. The position ring 2-3 is respectively attached to the left and right ends of the fixed seat plate 2-4, and the right end of the adjustment screw 2-5 passes through the left slider 2-1 and is threaded with the left slider 2-1 connect.

The left and right sides of the inclined rods 1-4 are respectively attached to the left and right sides of the strip hole 4-4.

The right sub-blackboard 4-3 and the left sub-blackboard 4-5 have the same structural dimensions, and are symmetrically arranged along the center line of the strip hole 4-4.

How it works: The left slider 2-1 and the right slider 3-1 can slide left and right on the two trapezoidal guide bars 1-2. The bottom surface of the bottom plate 1-1 can be used as the main blackboard, the two trapezoidal guide bars 1-2 on the bottom plate 1-1 are used for the left slider 2-1 and the right slider 3-1 to slide, and the inclined bar 1- The lower end of 4 can be rotated on two hinged supports I1-3. When the left slider 2-1 moves to the right, the left sub-blackboard 4-5 will rotate counterclockwise, so that the top plate 4-1 moves up and lifts up, the guide column 1-5 can slide on the two slide rails 4-2, and the top plate 4-1 drives the inclined rod 1-4 to rotate upward, so that the right sub-blackboard 4-3 will rotate clockwise. At this time, both the left sub-blackboard 4-5 and the right sub-blackboard 4-3 will be lifted and become inclined. Place the bottom plate 1-1 on the podium, the teacher uses the left sub-blackboard 4-5 and the right sub-blackboard 4-3 to write; if the left slider 2-1 moves to the left to the end, the top plate 4-1 and the right sub-blackboard 4-3 and the left sub-blackboard 4-5 are placed horizontally above the bottom plate 1-1 to form a flat plate. In this case, the lower end surface of the bottom plate 1-1 can be used as the main blackboard. The handle 1-7 can facilitate the lifting of the present invention and facilitate the movement of the present invention. When using the right sub-blackboard 4-3 and the left sub-blackboard 4-5, place the bottom plate 1-1 on the podium. 1-9 is in contact with the podium, and the four balls 1-10 are also in contact with the podium. At this time, the bottom plate 1-1 is rotated around the axis of the central axis 1-8, so as to facilitate the right sub-blackboard 4-3 and Switch between the left sub-blackboard 4-5, and turn the right sub-blackboard 4-3 and the left sub-blackboard 4-5 towards the students. Four balls 1-10 are in contact with the podium to reduce friction. When the lower end surface of the bottom plate 1-1 is used as the main blackboard, the present invention can be hung on the classroom wall by hanging the handle 1-7 on the nail on the wall. Rotating the adjusting screw 2-5 can drive the left slider 2-1 to move left and right. The function of the two limit rings 2-3 is to prevent the adjusting screw 2-5 from moving left and right relative to the fixed seat plate 2-4.

Trapezoidal guide bars 1-2 are fixedly connected to the front and rear ends of the bottom plate 1-1, two hinged supports I1-3 are fixedly connected to the middle position of the bottom plate 1-1, and the lower ends of the inclined rods 1-4 are hinged to the two Between the hinged supports I1-3, the upper end of the inclined rod 1-4 is fixedly connected with a guide column 1-5, and the front and rear ends of the left slide bar 2-1 are slidably connected to the left ends of the front and rear two trapezoidal guide bars 1-2 respectively. , the front and rear ends of the upper end of the left slide bar 2-1 are fixedly connected with a hinged support II2-2; the front and rear ends of the right slide bar 3-1 are slidably connected to the right ends of the front and rear two trapezoidal guide bars The front and rear ends of the upper end of the slide bar 3-1 are fixedly connected with hinged supports III3-2, so that the right slide bar 3-1 can slide left and right on the two trapezoidal guide bars 1-2. The left slider 2-1 can slide left and right on the two trapezoidal guide bars 1-2. The bottom surface of the bottom plate 1-1 can be used as the main blackboard, the two trapezoidal guide bars 1-2 on the bottom plate 1-1 are used for the left slider 2-1 and the right slider 3-1 to slide, and the inclined bar 1- The lower end of 4 can be rotated on two hinged supports I1-3.

A strip hole 4-4 is arranged in the middle of the top plate 4-1. The front end and the rear end of the strip hole 4-4 are open. The upper end of -1 is symmetrically provided with two slide rails 4-2 with elongated holes. The two slide rails 4-2 are respectively located on the left and right sides of the strip hole 4-4. Rectangular, the guide column 1-5 is cylindrical, the left and right ends of the guide column 1-5 can slide back and forth in the long holes of the two slide rails 4-2, and the two ends of the long hole are connected to the slide rail 4-2. There is a space between the corresponding ends of the guide columns 1-5, so as to meet the front and rear sliding requirements of the guide columns 1-5, and also prevent the guide columns 1-5 from falling off the slide rails 4-2. The upper end of the left sub-blackboard 4-5 is hinged to the left end of the top plate 4-1, the lower end of the left sub-blackboard 4-5 is hinged between two hinged supports II2-2, and the upper end of the right sub-blackboard 4-3 is hinged to the top plate 4 The right end of -1, the lower end of the right sub-blackboard 4-3 is hinged between two hinge supports III3-2, the upper end of the inclined rod 1-4 passes through the strip hole 4-4, the left and right sides of the guide column 1-5 The ends are slidably connected to the two slide rails 4-2, so that when the left slide bar 2-1 moves to the right, the left sub-blackboard 4-5 will rotate counterclockwise around its hinge axis with the hinge support II2-2, thereby The top plate 4-1 moves up and lifts up, the guide posts 1-5 can slide in the elongated holes of the two slide rails 4-2, the top plate 4-1 drives the inclined rod 1-4 to rotate upward, so that the right sub blackboard 4-3 It will rotate clockwise around the hinge axis of the hinged support III3-2. At this time, both the left sub-blackboard 4-5 and the right sub-blackboard 4-3 will be lifted and become inclined, and the bottom plate 1-1 will be placed flat. On the podium, the teacher uses the left sub-blackboard 4-5 and right sub-blackboard 4-3 to write; if the left slider 2-1 moves to the left to the end, the top board 4-1, right sub-blackboard 4-3 and left sub-blackboard 4-5 will be placed on the top of the bottom plate 1-1 to form a flat plate. At this time, the lower end surface of the bottom plate 1-1 can be used as the main blackboard.

A rectangular plate 1-6 is fixedly connected to the front end of the bottom plate 1-1, a handle 1-7 is fixedly connected to the upper end of the rectangular plate 1-6, and a ball 1 is fixedly connected to the four corners of the lower end surface of the bottom plate 1-1. -10, the center of the lower end face of the bottom plate 1-1 is fixedly connected with the central shaft 1-8, the lower end of the central shaft 1-8 is fixedly connected with a bearing, the inner ring of the bearing is fixedly connected with the central shaft 1-8, and the outer ring of the bearing is fixed Connected to the inner ring of the ring 1-9, so that the handle 1-7 can easily lift the present invention and facilitate the movement of the present invention. When using the right sub-blackboard 4-3 and the left sub-blackboard 4-5, the bottom -1 is supported on the podium by the ring 1-9 and the ball 1-10. At this time, the bottom plate 1-1 is rotated around the axis of the central axis 1-8, so as to facilitate the right sub-blackboard 4-3 and Switch between the left sub-blackboards 4-5 and turn the right sub-blackboard 4-3 or the left sub-blackboard 4-5 towards the students. The four balls 1-10 are in point contact with the podium, which can not only meet the support requirements, but also reduce the friction between the balls 1-10 and the table top, so that the bottom plate 1-1 can be rotated.

When using the lower end of the bottom plate 1-1 as the main blackboard, hang the handles 1-7 on the nails on the classroom wall to use.

It is fixedly connected to the left end of the base plate 1-1 through the fixed seat plate 2-4, the left end of the adjustment screw 2-5 is inserted on the fixed seat plate 2-4 with clearance fit, and the left end of the adjustment screw 2-5 is fixedly connected with two limit positions Ring 2-3, the two limit rings 2-3 are respectively fitted with the left and right ends of the fixed seat plate 2-4, and the right end of the adjusting screw 2-5 is matched with the left slider 2-1 through the thread, so that the rotation The adjustment screw 2-5 can drive the left slider 2-1 to move left and right. The function of the two limit rings 2-3 is to prevent the adjustment screw 2-5 from moving left and right relative to the fixed seat plate 2-4.

The left, right, front and rear mentioned in this application are all relative to the view direction shown in the accompanying drawings, the end facing the observer is the front end, the end facing away from the observer is the rear end, and the end located on the left hand of the observer is The left end, which is located at the right end of the observer, is the right end.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (4)

1. A teaching aid for higher mathematics, comprising a main blackboard assembly (1), a left slider assembly (2), a right slider assembly (3) and a secondary blackboard assembly (4), characterized in that: the main blackboard assembly (1) It includes a bottom plate (1-1), a trapezoidal guide strip (1-2), a hinged support I (1-3), an inclined rod (1-4) and a guide column (1-5), and the bottom plate ( 1-1) the front and rear ends are all fixedly connected with the trapezoidal guide strip (1-2) along its length direction, and the middle position of the rear end of the bottom plate (1-1) is fixedly connected with two described hinge supports 1 (1-3), the lower end of the inclined rod (1-4) is hinged between the two hinged supports I (1-3), and the upper end of the inclined rod (1-4) is fixedly connected with the guide column (1-5); The left slider assembly (2) includes a left slider (2-1) and a hinged support II (2-2), and the front and rear ends of the left slider (2-1) are slidably connected to the front and rear two respectively. The left end of the trapezoidal guide bar (1-2), the front and rear ends of the upper end of the left slide bar (2-1) are fixedly connected with the hinged support II (2-2); The right slide bar assembly (3) includes a right slide bar (3-1) and a hinged support III (3-2), and the front and rear ends of the right slide bar (3-1) are slidably connected to the front and rear two respectively. The right end of the trapezoidal guide bar (1-2), the front and rear ends of the upper end surface of the right slide bar (3-1) are fixedly connected with the hinged support III (3-2); The auxiliary blackboard assembly (4) includes a top plate (4-1), a sliding rail (4-2), a right auxiliary blackboard (4-3), a strip hole (4-4) and a left auxiliary blackboard (4-5) , the middle of the top plate (4-1) is provided with the strip hole (4-4), the front end of the strip hole (4-4) is open and the rear end is closed, the top plate (4-1) Two of the sliding rails (4-2) are symmetrically arranged at the upper end of the hole, and the two sliding rails (4-2) are symmetrically arranged on the left and right sides of the strip hole (4-4) respectively, and the sliding rails (4-2) 4-2) A long hole is arranged on the guide column (1-5), the upper end of the left auxiliary blackboard (4-5) is hinged to the left end of the top plate (4-1), and the left auxiliary blackboard (4-5) is hinged to the left end of the The lower end of the blackboard (4-5) is hinged between the two hinge supports II (2-2), and the upper end of the right sub-blackboard (4-3) is hinged to the right end of the top board (4-1). , the lower end of the right sub-blackboard (4-3) is hinged between the two hinge supports III (3-2), and the upper end of the inclined rod (1-4) passes through the strip hole ( 4-4), the left and right ends of the guide post (1-5) are respectively slidably connected to the two slide rails (4-2); the left slide bar assembly (2) further includes a limit ring ( 2-3), a fixed seat plate (2-4) and an adjustment screw (2-5), the fixed seat plate (2-4) is fixedly connected to the left end of the bottom plate (1-1), and the adjustment screw The left end of (2-5) is inserted on the fixed seat plate (2-4) in a clearance fit, and the left end of the adjusting screw (2-5) is fixedly connected with the two limit rings (2-3), The two limit rings (2-3) are respectively attached to the left and right ends of the fixed seat plate (2-4), and the right end of the adjustment screw (2-5) passes through the left slider ( 2-1) and threaded connection with the left slider (2-1). 2. A teaching aid for advanced mathematics according to claim 1, characterized in that: the main blackboard assembly (1) further comprises a rectangular plate (1-6), a handle (1-7), a central axis ( 1-8), the ring (1-9) and the ball (1-10), the front end of the bottom plate (1-1) is fixedly connected with the rectangular plate (1-6), the rectangular plate (1-1) -6) The handle (1-7) is fixedly connected to the side surface, and the balls (1-10) are fixedly connected to the four corners of the lower end surface of the bottom plate (1-1). (1-1) The center shaft (1-8) is fixedly connected to the center of the lower end surface, the lower end of the center shaft (1-8) is fixedly connected with a bearing, and the inner ring of the bearing is connected to the center shaft (1-8). 8) Fixed connection, the outer ring of the bearing is fixedly connected to the inner ring of the ring (1-9). 3. The teaching aid for advanced mathematics according to claim 2, wherein the left and right sides of the inclined rod (1-4) are respectively connected to the left and right sides of the strip hole (4-4). fit. 4. A kind of teaching aid for higher mathematics according to claim 3, characterized in that: the right auxiliary blackboard (4-3) and the left auxiliary blackboard (4-5) have the same structural dimensions, and the The centerlines of the strip holes (4-4) are symmetrically arranged.

Images