阅读说明：本技术 液面跟踪式反比例函数演示及图像绘制仪 (Liquid level tracking type inverse proportion function demonstration and image drawing instrument ) 是由 王书营 于 2020-06-16 设计创作，主要内容包括：本发明公开了液面跟踪式反比例函数演示及图像绘制仪,涉及教具演示技术领域,包括底盘支架、液体容器、画板、推进器、显示器,本发明结构简单,操作便捷,功能齐全,通过转动转盘就能通过设置第一显示器及第二显示器进行反比例函数关系的演示,通过设置画笔及画板,在液体能流动的环境下演示的同时并能在纸张、固定平面或实物表面上绘制图像,便于学生理解,适用于教学。(The invention discloses a liquid level tracking type inverse proportional function demonstration and image drawing instrument, which relates to the technical field of teaching aid demonstration and comprises a chassis support, a liquid container, a drawing board, a propeller and a display.)

1. Appearance is drawn to liquid level tracking formula inverse proportion function demonstration and image, its characterized in that, including chassis support (1), be equipped with liquid container (2) on chassis support (1), be equipped with drawing board (6) on liquid container (2), be equipped with propeller (3) in liquid container (2), be equipped with display (4) on propeller (3), be equipped with the cursory along with liquid container (2) interior liquid level lift and synchronous lift in display (4), demountable installation has installation pole (409) on the cursory, be equipped with centre gripping subassembly (9) and painting brush (5) on installation pole (409), propeller (3) are used for realizing the removal of display (4), and realize the lift of liquid level in liquid container (2) when display (4) remove.

2. The liquid level tracking inverse proportional function demonstration and image drawing instrument according to claim 1, wherein: the chassis support (1) comprises a bottom plate (102), support legs (101) are arranged on the bottom surface of the bottom plate (102), two mounting plates (103) are mounted on the bottom plate (102) through supporting rods (104), limiting holes (105) are formed in the mounting plates (103), and water leakage openings (106) are formed in the bottom plate (102).

3. The liquid level tracking inverse proportional function demonstration and image drawing instrument according to claim 2, wherein: the liquid container (2) comprises a water tank (201), a first partition plate (202) and a second partition plate (203), the first partition plate and the second partition plate are arranged in a cross shape, two groups of slots (206) are arranged on the upper end face of the water tank (201), a limiting column (219) matched with a limiting hole (105) is arranged at the bottom of the water tank (201), a square groove (218) and a first pin hole (207) communicated with the slots (206) are arranged on the left side wall and the right side wall of the water tank (201), a first scale (208) and a second scale (209) vertical to the first scale (208) are arranged on the outer side face of the front wall of the water tank (201), the first partition plate (202) divides the water tank (201) into a first demonstration area and a second demonstration area, the second partition plate (203) divides the first demonstration area into a first water storage area (214) and a first drying area (215), and the second partition plate (203) divides the second demonstration area into a second water storage area (216) and a second drying area (217), the utility model discloses a water storage device, including first baffle (203), second baffle (203) have two, just square groove (218) are located between two second baffles (203), be equipped with slide rail (204) on second baffle (203), be equipped with slider (205) on slide rail (204), first water storage district (214) and second water storage district (216) all are equipped with the guiding device, the guiding device includes first pipe (210), be equipped with second pipe (212) and first valve (211) on first pipe (210), be equipped with second valve (213) on second pipe (212).

4. The liquid level tracking inverse proportional function demonstration and image drawing instrument according to claim 3, wherein: all be equipped with propeller (3) in first demonstration district and the second demonstration district, propeller (3) include piston plate (301), be equipped with opening (302) with second baffle (203) looks adaptation on piston plate (301), the up end of piston plate (301) is equipped with draw-in groove (303), it is connected with threaded rod (304) to rotate on the lateral wall of piston plate (301), threaded connection has square piece (306) on threaded rod (304), and the one end that piston plate (301) were kept away from in threaded rod (304) is equipped with carousel (305).

5. The liquid level tracking inverse proportional function demonstration and image drawing instrument according to claim 4, wherein: the display (4) comprises a first display (401) positioned in a first demonstration area and a second display (402) positioned in a second demonstration area, the first display (401) and the second display (402) respectively comprise a connecting rope (413) and two installation frames (403) connected through a connecting plate (404), the two installation frames (403) in the first display (401) are respectively positioned in a first water storage area (214) and a first drying area (215), the two installation frames (403) in the second display (402) are respectively positioned in a second water storage area (216) and a second drying area (217), the side wall of each installation frame (403) is provided with a clamping block (414), the bottoms of the installation frames (403) positioned in the first water storage area (214) and the second water storage area (216) are respectively provided with a water permeable hole (412), and air bags (405) are respectively arranged in the installation frames (403) of the first water storage area (214) and the second water storage area (216), a first buoy (406) is arranged on an air bag (405) in the first water storage area (214), a third buoy (415) is arranged on an air bag (405) in the second water storage area (216), a second buoy (407) is arranged on an installation frame (403) of the first drying area (215), a fourth buoy (416) is arranged in an installation frame (403) of the second drying area (217), the first buoy (406) and the fourth buoy (416) are both provided with an indicator lamp (408) and an installation rod (409), guide blocks (410) are both arranged on the installation frames (403) in the first water storage area (214) and the second drying area (217), the installation rod (406) is an expansion rod, an outer sleeve of the expansion rod is slidably connected with the guide blocks (410), a fixed pulley (411) is arranged on the connecting plate (404), one end of a connecting cable (413) in the first display (401) is connected with the first buoy (406), the other end of the second display (402) is connected with a second buoy (407) through a fixed pulley (411), one end of a connecting rope (413) in the second display is connected with a third buoy (415), and the other end of the connecting rope is connected with a fourth buoy (416) through the fixed pulley (411).

6. The liquid level tracking inverse proportional function demonstration and image drawing instrument according to claim 5, wherein: the clamping assembly (9) comprises a guide post (901) installed at the upper end of an inner sliding rod of the telescopic rod, an arc-shaped clamping block (904) is connected onto the guide post (901) in a sliding mode, a limiting block (902) is arranged at the upper end of the guide post (901), a spring (903) is sleeved on the guide post (901), and the spring (903) is located between the arc-shaped clamping block (904) and the limiting block (902).

7. The liquid level tracking inverse proportional function demonstration and image drawing instrument according to claim 6, wherein: the drawing board (6) comprises a U-shaped frame (601), a rectangular plate (605) is arranged on the U-shaped frame (601), an inserting block (602) is arranged at the lower end of the U-shaped frame (601), a pin hole II (604) is formed in the inserting block (602), and an elastic clamping piece (603) is connected to the rectangular plate (605) in a rotating mode.

8. The liquid level tracking inverse proportional function demonstration and image drawing instrument according to claim 7, wherein: the piston plate (301) is connected with a guide pillar (7) in a threaded mode, the water tank (201) is provided with a guide sleeve (8), and the guide pillar (7) is connected with the guide sleeve (8) in a sliding mode.

Technical Field

The invention relates to the technical field of teaching aid demonstration, in particular to a liquid level tracking type inverse proportion function demonstration and image drawing instrument.

Background

The inverse scaling function y is k/x, (k is a constant, k is not equal to 0, x is not equal to 0), geometrically, the absolute value of k represents the rectangular area formed by the coordinates of x and y, the function image is a hyperbola, and when k is greater than 0, the image is in one quadrant or three quadrants. When k is less than 0, the image is in two and four quadrants. The inverse proportion function is very wide in human application and is important content of medium mathematics and high mathematics research, particularly for junior middle school students to master. Because the reflected relations are opposite, a teacher does not have a proper teaching aid and a real scene for guidance and inspiration when teaching, students in the beginning feel very arduous when learning, the meaning of a parameter k, the reciprocal relation between x and y, the formation of dynamic images and the like are more brought forward, and the double difficulties of teaching and learning are aggravated.

Disclosure of Invention

The invention aims to provide a liquid level tracking type inverse proportion function demonstration and image drawing instrument, which aims to overcome the defects caused in the prior art.

Appearance is drawn to liquid level tracking formula inverse proportion function demonstration and image, including the chassis support, be equipped with liquid container on the chassis support, be equipped with the drawing board on the liquid container, be equipped with the propeller in the liquid container, be equipped with the display on the propeller, be equipped with the cursory that goes up and down in step along with liquid container internal liquid level in the display, demountable installation has the installation pole on the cursory, be equipped with centre gripping subassembly and painting brush on the installation pole, the propeller is used for realizing the removal of display, and realizes the lift of liquid container internal liquid level when the display removes.

Preferably, the chassis support comprises a bottom plate, the bottom surface of the bottom plate is provided with support legs, the bottom plate is provided with two mounting plates through support rods, the mounting plates are provided with limiting holes, and the bottom plate is provided with water leaking ports.

Preferably, the liquid container comprises a water tank, a first partition plate and a second partition plate which are arranged in a cross shape, two groups of slots are arranged on the upper end face of the water tank, a limiting column matched with the limiting hole is arranged at the bottom of the water tank, a square groove and a first pin hole communicated with the slots are arranged on the left side wall and the right side wall of the water tank, a first scale and a second scale perpendicular to the first scale are arranged on the outer side face of the front wall of the water tank, the first partition plate divides the water tank into a second demonstration area and a first demonstration area from left to right, the second partition plate divides the first demonstration area into a first water storage area and a first drying area, the second partition plate divides the second demonstration area into a second water storage area and a second drying area, the second partition plate has two blocks, the square groove is positioned between the two second partition plates, a slide rail is arranged on the second partition plate, and a slide block is arranged on the slide, the first water storage area and the second water storage area are both provided with a flow guide device, the flow guide device comprises a first pipe, the first pipe is provided with a second pipe and a first valve, and the second pipe is provided with a second valve.

Preferably, all be equipped with the propeller in first demonstration district and the second demonstration district, the propeller includes the piston plate, be equipped with the opening with second baffle looks adaptation on the piston plate, the up end of piston plate is equipped with the draw-in groove, it is connected with the threaded rod to rotate on the lateral wall of piston plate, threaded connection has square piece on the threaded rod, and the one end that the piston plate was kept away from to the threaded rod is equipped with the carousel.

Preferably, the display comprises a first display positioned in a first demonstration area and a second display positioned in a second demonstration area, the first display and the second display both comprise a connecting rope and two installation frames connected through a connecting plate, the two installation frames in the first display are respectively positioned in a first water storage area and a first drying area, the two installation frames in the second display are respectively positioned in a second water storage area and a second drying area, the side wall of each installation frame is provided with a clamping block, the bottoms of the installation frames in the first water storage area and the second water storage area are respectively provided with a water permeable hole, the installation frames in the first water storage area and the second water storage area are respectively provided with an air bag, the air bag in the first water storage area is provided with a first float, the air bag in the second water storage area is provided with a third float, the installation frame in the first drying area is provided with a second float, and the installation frame in the second drying area is provided with a fourth float, all be equipped with pilot lamp and installation pole on first cursory and the fourth cursory, be located and all be equipped with the guide block on the installing frame of first water storage district and the dry district of second, the installation pole is the telescopic link, and the outer tube of telescopic link and guide block sliding connection be equipped with the fixed pulley on the connecting plate, even suo of cable in the first display is connected with first cursory, and the other end passes through the fixed pulley and is connected with the second cursory, even suo of cable in the second display is connected with the third cursory, and the other end passes through the fixed pulley and is connected with the fourth cursory.

Preferably, the centre gripping subassembly is including installing the guide post in the interior slide bar upper end of telescopic link, sliding connection has the arc grip block on the guide post, and the upper end of guide post is equipped with the stopper, the spring has been cup jointed on the guide post, the spring is located between arc grip block and the stopper.

Preferably, the drawing board includes the U-shaped frame, be equipped with the rectangular plate on the U-shaped frame, and the lower extreme of U-shaped frame is equipped with the inserted block, be equipped with pinhole two on the inserted block, rotate on the rectangular plate and be connected with the elasticity holder.

Preferably, the piston plate is in threaded connection with a guide pillar, the water tank is provided with a guide sleeve, and the guide pillar is in sliding connection with the guide sleeve.

The invention has the advantages that: simple structure, the simple operation, multiple functional, just can carry out the demonstration of inverse proportion functional relation through rotating carousel 305 through the first display and the second display that set up, k >0 or k <0 in the inverse proportion functional relation can be realized in the first demonstration district, x > 0's demonstration, k >0 or k <0 in the inverse proportion functional relation can be realized in the second demonstration district, x < 0's demonstration, through setting up painting brush and drawing board, can demonstrate under the environment that liquid can flow and can be at the paper, the image is drawn on fixed plane or the object surface, the student of being convenient for understands, and is applicable to the teaching.

Drawings

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

Fig. 2 is a schematic structural view of the chassis frame according to the present invention.

Fig. 3 and 4 are schematic structural views of the liquid container in different viewing angles.

Fig. 5 is a schematic structural view of the propeller of the present invention.

Fig. 6 is a schematic structural diagram of a first display in the present invention.

FIG. 7 is a schematic structural diagram of a second display according to the present invention.

Fig. 8 is a schematic structural diagram of the drawing board of the present invention.

FIG. 9 is a schematic view of a clamping assembly according to the present invention.

Wherein, 1-chassis support, 101-support leg, 102-bottom plate, 103-mounting plate, 104-support bar, 105-limit hole, 106-water leakage port, 2-liquid container, 201-water tank, 202-first baffle plate, 203-second baffle plate, 204-slide rail, 205-slide block, 206-slot, 207-pin hole I, 208-first scale, 209-second scale, 210-first conduit, 211-first valve, 212-second conduit, 213-second valve, 214-first water storage area, 215-first drying area, 216-second water storage area, 217-second drying area, 218-square groove, 219-limit column, 3-propeller, 301-piston plate, 302-opening, 303-clamping groove, 304-threaded rod, 305-rotating disk, 306-square block, 4-display, 401-first display, 402-second display, 403-mounting frame, 404-connecting plate, 405-air bag, 406-first buoy, 407-second buoy, 408-indicator light, 409-mounting rod, 410-guide block, 411-fixed pulley, 412-water permeable hole, 413-connecting rope, 414-clamping block, 415-third buoy, 416-fourth buoy, 5-painting brush, 6-painting board, 601-U-shaped frame, 602-insertion block, 603-elastic clamping piece, 604-pin hole two, 7-guide column, 8-guide sleeve, 9-clamping component, 901-guide column, 902-limiting block, 903-spring, 904-arc clamp block.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 9, appearance is drawn to liquid level tracking formula inverse proportion function demonstration and image, including chassis support 1, be equipped with liquid container 2 on the chassis support 1, be equipped with drawing board 6 on the liquid container 2, be equipped with propeller 3 in the liquid container 2, be equipped with display 4 on the propeller 3, be equipped with the cursory that goes up and down in step along with liquid level lift in the liquid container 2 in the display 4, demountable installation has installation pole 409 on the cursory, be equipped with centre gripping subassembly 9 and painting brush 5 on the installation pole 409, propeller 3 is used for realizing the removal of display 4, and realizes the lift of liquid level in the liquid container 2 when display 4 removes.

In this embodiment, the chassis bracket 1 includes a bottom plate 102, the bottom plate 102 is a rectangular hard plate, a supporting leg 101 is fixedly installed on the bottom surface of the bottom plate 102, the supporting leg 101 is used for adjusting the height of the bottom plate 102, and the supporting leg 101 makes the device more stable when in use, two mounting plates 103 are installed on the bottom plate 102 through a supporting rod 104, an opening 302 is formed between the two mounting plates 103, which is convenient for placing a flow guide device in the liquid container 2, a limiting hole 105 is formed on the mounting plate 103, and a water leakage port 106 is formed on the bottom plate 102.

In this embodiment, the liquid container 2 includes a water tank 201, and a first partition plate 202 and a second partition plate 203 which are arranged in a cross shape, the water tank 201 is a transparent uncovered rectangular water tank 201 with a smooth inner wall, two sets of slots 206 are arranged on an upper end surface of the water tank 201, a limiting column 219 adapted to the limiting hole 105 is arranged at the bottom of the water tank 201, a square groove 218 and a first pin hole 207 communicated with the slots 206 are arranged on both left and right side walls of the water tank 201, a first scale 208 and a second scale 209 perpendicular to the first scale 208 are arranged on an outer side surface of a front wall of the water tank 201, two types of the second scale 209 are respectively arranged at upper and lower ends of the first scale 208, the first partition plate 202 divides the water tank 201 into a first demonstration area and a second demonstration area from right to left, the second partition plate 203 is a transparent plate, and the second partition plate 203 divides the first demonstration area into a first water storage area 214 and a first dry area 215, the second partition 203 divides the second demonstration area into a second water storage area 216 and a second dry area 217, the second partition 203 has two blocks, the square groove 218 is located between the two second partitions 203, the second partition 203 is provided with a slide rail 204, the slide rail 204 is provided with a slide block 205, the first water storage area 214 and the second water storage area 216 are both provided with a flow guide device, the flow guide device comprises a first guide pipe 210, the first guide pipe 210 is provided with a second guide pipe 212 and a first valve 211, the second guide pipe 212 is provided with a second valve 213, the installation of the liquid container 2 is realized by inserting a limit column 219 into the limit hole 105, the first guide pipe 210 is connected with an external water source, the first valve 211 is opened, water enters the first water storage area 214 or the second water storage area 216 through the first guide pipe 210, the first valve 211 is closed, the second valve 213 is opened, and water in the first water storage area 214 or the second water storage area 216 flows out through a second pipeline, the level of liquid within the first reservoir 214 or the second reservoir 216 may be adjusted.

In this embodiment, the first demonstration area and the second demonstration area are both provided with the thruster 3, the thruster 3 comprises a piston plate 301, an opening 302 matched with the second partition plate 203 is arranged on the piston plate 301, a clamping groove 303 is arranged on the upper end surface of the piston plate 301, a threaded rod 304 is rotatably connected to the side wall of the piston plate 301, a square block 306 is connected to the threaded rod 304 in a threaded manner, and the end of the threaded rod 304 away from the piston plate 301 is provided with a rotating disc 305, which clips the opening 302 on the piston plate 301 into the second partition plate 203, the piston plate 301 is connected with the sliding block 205, through the structure of the sliding block 205 and the sliding rail 204, the movement of the piston plate 301 is facilitated, the square block 306 is clamped in the square groove 218, by rotating the threaded rod 304 through the rotating disc 305, the threaded rod 304 drives the piston plate 301 to move, and the liquid level in the first water storage area 214 or the second water storage area 216 changes along with the movement of the piston plate 301.

In this embodiment, the display 4 includes a first display 401 located in a first demonstration area and a second display 402 located in a second demonstration area, the first display 401 and the second display 402 both include a connecting cable 413 and two mounting frames 403 connected by a connecting plate 404, the mounting frames 403 are transparent uncovered rectangular water tanks 201 with smooth inner walls, the two mounting frames 403 in the first display 401 are located in the first water storage area 214 and the first dry area 215 respectively, the two mounting frames 403 in the second display 402 are located in the second water storage area 216 and the second dry area 217 respectively, the side walls of the mounting frames are provided with clamping blocks 414, the clamping blocks 414 are clamped in the clamping grooves 303 on the piston plate 301, then the mounting frames 403 are fixed by bolts, so that the mounting of the display 4 can be completed, the bottoms of the mounting frames 403 located in the first water storage area 214 and the second water storage area 216 are provided with water through holes 412, and the mounting frame 403 of the first water storage area 214 and the mounting frame 403 of the second water storage area 216 are both provided with air bags 405 therein, the floats comprise a first float 406, a second float 407, a third float 415 and a fourth float 416, the first float 406 is fixed on the air bag 405 in the first water storage area 214, the third float 415 is fixed on the air bag 405 of the second water storage area 216, the second float 407 is positioned on the mounting frame 403 of the first drying area 215, the fourth float 416 is positioned in the mounting frame 403 of the second drying area 217, the first float 406 and the fourth float 416 are both provided with an indicator light 408 and a mounting rod 409, the mounting frames 403 positioned on the first water storage area 214 and the second drying area 217 are both provided with a guide block 410, the mounting rod is a telescopic rod which is an outer sleeve 409 and a rod sliding in the outer sleeve, the outer sleeve is connected with the guide block 410 in a sliding manner, the connecting plate 404 is provided with a fixed pulley 411, one end of a connecting rope 413 in the first display 401 is connected with the first float 406, the other end of the connecting rope 413 in the second display 402 is connected with the second float 407 through a fixed pulley 411, one end of the connecting rope 413 in the second display 402 is connected with the third float 415, the other end of the connecting rope 413 in the second display 402 is connected with the fourth float 416 through the fixed pulley 411, the propeller 3 moves towards the first partition 202, the propeller 3 moves to drive the display 4 to move, the display 4 moves to drive the indicator light 408 and the mounting rod 409 to move, so that the indicator light 408 and the mounting rod 409 move in the X-axis direction, in the moving process of the propeller 3, the liquid level in the first water storage area 214 or the second water storage area 216 rises, the liquid level rises to drive the first float 406 or the fourth float 416 through the air bag 405, the first float 406 rises to drive the indicator light 408 and the mounting rod 409 on the first float 406 to rise, so that the indicator light 408 and the mounting rod 409 move in the Y-axis direction, it should be noted that the volume of the air bag 405 under the liquid surface is negligible, when the mounting rod 409 in the first display 401 is located in the mounting frame 403 in the first water storage area 214, the sum of the weights of the air bag 405, the first float 406, the indicator light 408, the mounting rod 409, the clamping component 9 and the painting brush 5 is greater than the weight of the second float 407, when the mounting rod 409 in the first display 401 is located in the mounting frame 403 in the first dry area 215, the sum of the weights of the air bag 405, the first float 406 and the indicator light 408 is greater than the sum of the weights of the second float 407, the mounting rod 409, the clamping component 9 and the painting brush 5 by weighting or reducing the gas in the air bag 405, the sum of the weights of the air bag 405, the third float 415 is greater than the sum of the weights of the fourth float 416, the indicator light 408, the mounting rod 409, the clamping component 9 and the painting brush 5 when the mounting rod 409 in the second display 402 is located in the mounting frame 403 in the second dry area 217, when mounting bar 409 in second display 402 is positioned within mounting frame 403 in second water storage area 216, the sum of the weights of air bag 405, third float 415, mounting bar 409, clamping assembly 9, and brush 5 is greater than the sum of the weights of fourth float 416 and indicator light 408 by weighting or reducing the air in air bag 405.

In this embodiment, the clamping assembly 9 includes a guide post 901 installed on the upper end of the inner sliding rod, an arc-shaped clamping block 904 is connected to the guide post 901 in a sliding manner, a limiting block 902 is arranged at the upper end of the guide post 901, a spring 903 is sleeved on the guide post 901, the spring 903 is located between the arc-shaped clamping block 904 and the limiting block 902, the arc-shaped clamping block 904 is pulled upwards, the painting brush 5 is placed between the arc-shaped clamping block 904 and the installation rod 409, the arc-shaped clamping block 904 is loosened, the spring 903 resets, and the painting brush 5 is fixed by the arc-shaped clamping block 904.

In this embodiment, drawing board 6 includes U-shaped frame 601, be equipped with rectangular plate 605 on U-shaped frame 601, and the lower extreme of U-shaped frame 601 is equipped with inserted block 602, be equipped with two pinholes 604 on the inserted block 602, the last flexible holder 603 that is connected rotates of rectangular plate 605, inserts inserted block 602 in slot 206, inserts pinhole 207 and two pinholes 604 through the pin, can realize drawing board 6's fixing, and the flexible holder 603 of rotating the connection is convenient for fixed to the paper.

In this embodiment, the piston plate 301 is screwed with the guide post 7, the water tank 201 is provided with the guide sleeve 8, the guide post 7 is slidably connected with the guide sleeve 8, and the guide post 7 and the guide sleeve 8 can limit the movement of the piston plate 301.

The invention changes the liquid level position by means of piston movement according to the plane and the liquid flow volume unchanged, and converts the liquid level moving point track into the composite motion of the orthogonal point on the plane through the buoyancy tracking characteristic

The working process and principle are as follows: firstly, instrument installation: placing a liquid container 2 on a chassis support 1, inserting a limiting column 219 into a limiting hole 105, then respectively placing two propellers 3 into a first demonstration area and a second demonstration area, simultaneously clamping an opening 302 on a piston plate 301 into a second partition plate 203, connecting the piston plate 301 with a sliding block 205, clamping a square block 306 into a square groove 218, then respectively placing a first display 401 and a second display 402 into the first demonstration area and the second demonstration area, clamping a clamping block 414 into a clamping groove 303, fixing through a bolt, then inserting an inserting block 602 into a first group of slots 206 in front, inserting a pin into a first pin hole 207 and a second pin hole 604, fixing a drawing board 6, placing paper on a rectangular plate 605 and fixing through an elastic clamping piece 603, upwards pulling an arc-shaped clamping block 904 to fix a drawing pen 5, and finally connecting a first conduit 210 with an external water source to finish installation;

symbol setting: a first scale 208 on the front side surface of the water tank 201 is used as a Y axis, a second scale 209 is used as an X axis, a coordinate system formed by the first scale 208 and the second scale 209 is set as OXY, the first scale 208 and the second scale 209 below the first scale 208 are used for representing, planes corresponding to a first demonstration area and a second demonstration area are respectively a first quadrant and a second quadrant, the first scale 208 and the second scale 209 above the first scale 208 are used for representing, the planes corresponding to the first demonstration area and the second demonstration area are respectively a fourth quadrant and a third quadrant, the central points of two indicator lamps 408 are moving points P (X, Y) on the OXY, X and Y respectively represent the length and height of a side liquid rectangle, and a coordinate system formed by the plane where the drawing board 6 is located is set as O₁XY, point of brush 5 at O₁XY is set to point Q (x, y), where the point of action P corresponds to point Q;

adjusting the initial position: 1. inverse proportional function of y-k/x, k>0, x ≠ 0. And determining an inverse proportion coefficient k, wherein the inverse proportion function image is positioned in one quadrant and three quadrants. 2. Any point x on the first scale 208 in the first quadrant₀On the second scale 209, point y is taken₀＝k/x₀Drawing rectangle Ox₀P₀y₀To obtain a point P₀(x₀,y₀) By rotating the turntable 305, the piston plate 301 is moved, when the left side surface of the piston plate 301 moves to x₀P₀After the water level is consistent, the water level is fixed, the first valve 211 in the flow guide device in the first water storage area 214 is opened, water is filled into the first water storage area 214, and the water level is higher than the point P₀Stopping filling water, opening the second valve 213 to regulate water level and P₀y₀And closing after the consistency. 3. Any point x on the first scale 208 in the second quadrant₁＝-x₀On the second scale 209, point y is taken₁＝k/x₀Drawing rectangle Ox₁P₁y₁To obtain a point P₁(x₁,y₁) By rotating the turntable 305, the piston plate 301 is moved, when the right side of the piston plate 301 moves to x₁P₁After the water level is consistent, the first valve 211 in the diversion device in the second water storage area 216 is opened, water is filled into the first water storage area 214, and the liquid level is higher than the point P₁Stopping filling water, opening the second valve 213 to regulate water level and P₁y₁And closing after the consistency. 4. Fix in the rectangle piece through elasticity holder 603 with the paper, draw out coordinate system 0xy on the paper, the y axle and the first scale 208 collineation in the coordinate system 0xy, be fixed in on installation pole 409 through centre gripping subassembly 9 with painting brush 5, adjust installation pole 409 height, make the painting brush 5 of first demonstration district top be located first quadrant, and the point of painting brush 5 above first demonstration district on the paper is P promptly₀(x₀,y₀) The painting brush 5 above the second demonstration area is positioned in the third quadrant, and the point of the painting brush 5 above the second demonstration area on the paper is P₁(x₁,y₁)。

Demonstrating and drawing an image: x is the number of>0, by rotating the rotary disc 305 in the first demonstration area, the piston plate 301 of the first water storage area 214 is slowly pushed to the left, the liquid level of the first water storage area 214 rises, and the indicator light 408 in the first display 401 moves to the upper left, indicating that the rectangle Ox is formed₀P₀y₀The inverse relationship that the area is not widened and reduced but is increased in length is achieved, meanwhile, the painting brush 5 draws a curve on the paper, the shaking is stopped when the piston plate 301 approaches the first partition plate 202, the painting brush 5 is separated from the paper and fixed, the stopping point is marked as A, and the curve AQ₀That is, a curve is plotted, the dial 305 is rotated in the reverse direction, the piston plate 301 is slowly pulled to the right, the liquid level in the first reservoir 214 is lowered, the indicator lamp 408 in the first display 401 is moved to the right and downward, indicating that the rectangular area is inversely proportional to the rectangular area increasing without widening but decreasing in length, when the brush 5 reaches Q₀The pen is fixed by contacting with the paper, the turntable 305 is rotated continuously, the swing is stopped when the piston plate 301 approaches the right end, the painting brush 5 is separated from the paper and fixed, the stopping point is marked as B, and the curve AB is x>One hyperbola of 0.

X < 0. by rotating the dial 305 in the second demonstration area, the piston plate 301 in the second water storage area 216 is slowly pushed to the right, the liquid level in the second water storage area 216 rises, the third float 415 moves up, the fourth float 416 moves down, the indicator lamp 408 in the second display 402 moves to the right and downward, the brush 5 draws a curve on the paper, when the piston plate 301 approaches the first partition 202, the rocking is stopped, the brush 5 is separated from the paper and fixed, the stop point is marked as C, the curve CQ1 is a section of the drawn curve, the brush 5 is separated from the paper and fixed, the dial 305 in the second demonstration area is reversely rotated, the piston plate 301 in the second water storage area 216 is slowly pulled to the left, the liquid level in the second water storage area 216 drops, the third float 415 moves down, the fourth float 416 moves up, the indicator lamp 408 in the second display 402 moves to the left and upward, the brush 5 contacts the paper and is fixed when the brush 5 reaches Q1, continuing to rotate the turntable 305, stopping shaking when the piston plate 301 is close to the left end, so that the painting brush 5 is separated from the paper surface and fixed, wherein the stopping point is marked as D, and the curve CD is a hyperbola with x being less than 0;

the inverse proportion function is required to be drawn to be y ═ k/x, k is less than 0, x ≠ 0, an inverse proportion coefficient k is determined, at the time, the inverse proportion function image is located in the second quadrant and the fourth quadrant, the inserting block 602 is inserted into the second group of inserting grooves 206 located at the rear part, then the drawing board 6 is fixed by inserting pins into the first pin hole 207 and the second pin hole 604, then the mounting rod 409, the guide block 410 and the painting brush 5 in the mounting frame 403 in the first water storage area 214 are mounted in the mounting frame 403 in the first drying area 215, meanwhile, the sum of the weights of the air bag 405, the first float 406 and the indicator light 408 is larger than the sum of the weights of the second float 407, the mounting rod 409, the clamping component 9 and the painting brush 5 by balancing weights, the height of the mounting rod 409 is adjusted to enable the painting brush 5 to be located in the fourth quadrant, the mounting rod 409, the guide block 410 and the painting brush 5 in the mounting frame 403 in the second water storage area 217 are mounted in the mounting frame 403 in the, meanwhile, the sum of the weights of the air bag 405, the third floater 415, the mounting rod 409, the clamping component 9 and the painting brush 5 is larger than the sum of the weights of the fourth floater 416 and the indicator light 408 through the balance weight, the height of the mounting rod 409 is adjusted, the painting brush is located in the second quadrant, then the steps are repeated, and an inverse proportion function image with y being equal to k/x, k being less than 0 and x being equal to 0 is drawn.

And (4) ending drawing: the sheet on which the image is drawn is removed, and the apparatus is returned to the initial state.

Based on the above, the invention has the advantages of simple structure, convenient operation and complete functions, the first display 401 and the second display 402 can be used for demonstrating inverse proportional function relation by rotating the turntable 305, and the painting brush 5 and the painting board 6 are arranged for demonstrating in the environment of liquid flow and simultaneously drawing images on the surfaces of paper, a fixed plane or a material object, so that the teaching aid is convenient for students to understand and is suitable for teaching.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.