CN114043811A - Adjustable second-order differential equation derivation device - Google Patents
Adjustable second-order differential equation derivation device Download PDFInfo
- Publication number
- CN114043811A CN114043811A CN202111176003.7A CN202111176003A CN114043811A CN 114043811 A CN114043811 A CN 114043811A CN 202111176003 A CN202111176003 A CN 202111176003A CN 114043811 A CN114043811 A CN 114043811A
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- plate
- pedal
- spring
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009795 derivation Methods 0.000 title claims abstract description 18
- 239000000428 dust Substances 0.000 claims abstract description 50
- 238000010408 sweeping Methods 0.000 claims abstract description 34
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 19
- 238000005192 partition Methods 0.000 claims abstract description 11
- 238000009827 uniform distribution Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims 2
- 230000009471 action Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
- B43L1/04—Blackboards
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B97/00—Furniture or accessories for furniture, not provided for in other groups of this subclass
- A47B97/04—Easels or stands for blackboards or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The invention provides an adjustable second-order differential equation derivation device, which belongs to the technical field of blackboards and comprises a demonstration board, a vertical rod, supporting legs, rollers, a reinforcing cross rod, a gel pen storage box, an ink dust bearing component, an auxiliary stable pedal component and a dust sweeping component, wherein the ink dust bearing component is arranged to bear ink dust generated in writing and wiping; the stability of the whole device can be improved by arranging the auxiliary stable pedal assembly and treading the pedal plate and utilizing the rigid connection between the pedal plate and the whole device, and the demonstration board cannot shake during writing, so that the comfort degree and the definition of writing are improved; the printing ink dust borne by the fixing frame can be cleaned by arranging the dust sweeping assembly; the gel pen storage box is divided into two areas by the partition board, so that gel pens which can be used and gel pens which cannot be used can be stored separately, and the gel pens can be taken conveniently.
Description
Technical Field
The invention belongs to the technical field of blackboards, and particularly relates to an adjustable second-order differential equation derivation device.
Background
The second order differential equation includes an independent variable and a dependent variable. Within the mathematical expression, x is usually used to represent the independent variable and y is used to represent the dependent variable. The white board is a display tool used in teaching or discussion. The movable white board is divided into a movable white board and a non-movable white board in forms, a pair of rollers are fixedly connected to the bottom end of a white board support frame to facilitate movement, and the movable white board is mostly used in the discussed scene; the immovable whiteboard is mostly fixed on a wall surface, for example, a wall surface of a classroom. The prior movable white board has the following technical problems in the using process. Firstly, even if the roller at the bottom end of the movable white board is statically fixed on the ground through the brake function of the roller, the stability degree of the roller is limited. When writing on the whiteboard, the whole whiteboard still slightly shakes, so that unsmooth writing or distorted handwriting is caused, and the display effect is influenced; secondly, the derivation process of the second-order differential equation is complex, and the derivation formula is long in length, so that a large amount of printing ink is consumed, a white board needs to be wiped repeatedly, a large amount of printing ink dust is generated in the process, and the printing ink dust falls on the ground or floats in the air, so that the cleaning task is increased, and the printing ink dust can be possibly sucked by a human body to damage the health of the human body; thirdly, the existing display tool is not provided with a special gel pen accommodating device, and the gel pen is usually placed on a table top near the display device, so that the gel pen is easily lost or is difficult to find again and again during use.
Disclosure of Invention
The present invention provides an adjustable second order differential equation derivation apparatus to solve the above technical problems.
An adjustable second-order differential equation derivation device comprises a demonstration board, a vertical rod, supporting legs, rollers and a reinforcing cross rod, and further comprises a gel pen storage box, an ink dust bearing assembly, an auxiliary stable pedal assembly and a dust sweeping assembly;
the lower surface of the supporting leg is fixedly connected with a pair of idler wheels, the upper surface of the supporting leg is fixedly connected with an upright rod, the upright rod is fixedly connected to the middle position of the upper surface of the supporting leg, and the pair of idler wheels are symmetrically distributed on the lower surface of the supporting leg relative to the upright rod;
the outer side of the demonstration plate is fixedly sleeved with a fixing frame, and the fixing frame is fixedly connected with the demonstration plate through screws; the left side and the right side of the fixing frame are respectively and fixedly connected with a first fixing shaft through a connecting plate, and one end of the first fixing shaft, which is far away from the fixing frame, penetrates through the top of the vertical rod and is in threaded connection with the fastening screw cap; the first fixed shaft is rotatably connected with the vertical rod and is fixed through a fastening screw cap; the pair of upright posts are connected through a reinforcing cross bar;
the ink ash receiving assembly comprises a slide rail and a receiving plate, and the fixing frame is fixedly connected with a pair of slide rails perpendicular to the fixing frame; a sliding groove perpendicular to the fixing frame is formed in the sliding rail;
the left end and the right end of the bearing plate are clamped inside the sliding grooves, the bearing plate is supported through the sliding rails, the gel pen storage box is fixedly connected to one vertical rod through a fixing sleeve, the gel pen storage box is horizontally arranged right below the demonstration plate, and the opening of the gel pen storage box is upward; the gel pen storage box is divided into two areas by a vertically arranged partition plate, one area is used for storing gel pens in use, the other area is used for storing gel pens with exhausted ink, and the inside of the area used for storing the gel pens in use is divided into independent areas by a plurality of partition plates in a criss-cross mode;
the auxiliary stable pedal assembly comprises a pedal, a first connecting sleeve, a second connecting sleeve, a connecting vertical rod and a second fixed shaft, wherein the first connecting sleeve is movably sleeved on the reinforcing cross rod and can horizontally and freely slide along the reinforcing cross rod; the bottom end of the connecting sleeve I is fixedly connected with a connecting vertical rod which points to the ground vertically, and the bottom end of the connecting vertical rod is fixedly connected with a horizontal fixed shaft II; a pair of second connecting sleeves is fixedly connected to the side face, close to the second fixed shaft, of the pedal plate, the second connecting sleeves are respectively sleeved at two ends of the second fixed shaft, the second connecting sleeves are rotatably connected with the second fixed shaft through bearings, and the vertical connecting rods are connected with the pedal plate through first springs; when a foot steps on the pedal, the pedal rotates downwards to be in contact with the ground, and the first spring is stretched in the process; when the pedal is loosened, the first spring restores to the original length, and the pedal tilts upwards under the restoring force of the first spring to leave the ground; the lower surface of the pedal leaves the ground; the fixed frame is provided with a dust sweeping assembly in a matching manner.
As a preferable technical scheme of the invention, the upper surface of the pedal plate is fixedly connected with anti-skid convex blocks for increasing the treading friction force, and the anti-skid convex blocks are staggered with each other.
As a preferable technical solution of the present invention, a water tank is provided on an upper surface of the receiving plate.
As a preferred embodiment of the present invention, a wrench is fixedly connected to the fastening screw cap.
In a preferred embodiment of the present invention, the reinforcing bars are a pair, and the pedal is fixedly connected to the reinforcing bar at a lower position.
As a preferable technical scheme of the invention, a connecting ring is fixedly connected to the pedal plate, a connecting ring is also fixedly connected to the connecting vertical rod, and two ends of the first spring are respectively hooked to the connecting ring.
As a preferred technical scheme of the invention, the fixing frame is provided with a through hole penetrating through the fixing frame, the through hole horizontally extends from the left side to the right side along the fixing frame, the dust sweeping component comprises a dust sweeping brush, a connecting cross rod, a second spring, an elastic uniform distribution plate and a baffle plate, the connecting cross rod penetrates through the through hole, one end of the connecting cross rod is exposed out of the front side of the demonstration plate, the other end of the connecting cross rod is exposed out of the back side of the demonstration plate, one end of the connecting cross rod positioned on the front side of the demonstration plate is fixedly connected with the dust sweeping brush, the dust sweeping brush is positioned above the connecting cross rod, a brush part of the dust sweeping brush is tightly contacted with the fixing frame, the elastic uniform distribution plate and the second spring are sleeved on the part of the connecting cross rod positioned on the back side of the demonstration plate, the end part of the connecting cross rod positioned on the back side of the demonstration plate is fixedly connected with the baffle plate, and one end of the second spring is fixedly connected with the elastic uniform distribution plate, the other end of the second spring is fixedly connected with the baffle, the elastic uniform distribution plate is in close contact with the back of the demonstration plate, and the second spring is always in a compression state.
As a preferable technical scheme of the invention, the connecting vertical rod can horizontally and freely slide along the through hole, and the dust sweeping brush is always tightly attached to the front surface of the demonstration board under the action of the elastic force of the second spring.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, the gel pen storage box is arranged, so that the gel pen can be independently stored, and a large amount of printing ink dust falling on the gel pen is prevented from being attached to the hands or clothes of a user; by arranging the ink ash receiving component, the ink ash receiving plate can receive ink ash generated in writing and wiping, so that the ink ash is prevented from falling onto the ground, and the cleaning task amount is reduced; furthermore, the water containing groove is formed in the bearing plate, so that ink dust accumulated on the bearing plate can be prevented from flying and being absorbed into a human body, and the bearing plate is connected with the demonstration device in a sliding mode through the sliding rail, so that the demonstration plate can be conveniently disassembled, assembled and washed; the stability of the whole device can be improved by arranging the auxiliary stable pedal assembly and treading the pedal plate and utilizing the rigid connection between the pedal plate and the whole device, and the demonstration board cannot shake during writing, so that the comfort degree and the definition of writing are improved; furthermore, the pedals can horizontally and freely slide along the reinforcing cross rod through the first limiting connecting sleeve, so that a speaker can adjust the horizontal position of the pedals according to the requirement of the self-standing position; furthermore, the friction force of the pedal plate can be improved by fixedly connecting a plurality of anti-skidding convex blocks on the upper surface of the pedal plate; furthermore, the pedal and the connecting vertical rod are fixedly connected through the first spring, so that the pedal can be kept away from the ground when not working, and the pedal cannot rub with the ground when the whole demonstration device moves; furthermore, the spanner is fixedly connected to the fastening screw cap, so that the fastening screw cap can be directly fastened or loosened without the aid of tools, and the inclination angle of the demonstration board can be conveniently adjusted.
2. The spring II is in a compressed state, one side, close to the demonstration board, of the dust sweeping brush is always tightly attached to the front face of the demonstration board under the compression action of the spring II, so that the brush part of the dust sweeping brush can sweep the contact position of the fixing frame and the demonstration board, furthermore, the elastic force of the spring II can be uniformly conducted to the connecting cross rod by arranging the elastic force uniform distribution board, the connecting cross rod is pushed to horizontally and freely slide along the through hole, and the ink dust borne by the fixing frame can be swept; the gel pen storage box is divided into two areas by the partition plate, so that gel pens which are still available and cannot be used can be separately stored, and the gel pens can be taken conveniently; the storage area of the usable gel ink pens is divided into independent storage spaces, so that the gel ink pens can be prevented from being stacked together.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a first perspective structure of the present invention;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
FIG. 3 is a schematic view of a second perspective structure of the present invention;
FIG. 4 is a schematic view of the installation of the ink dust receiving assembly, the fixing frame and the demonstration board according to the present invention;
FIG. 5 is an enlarged view of the structure at B in FIG. 4;
FIG. 6 is a schematic view of the assembly of the gel pen container and the vertical rod of the present invention;
FIG. 7 is a schematic view of the installation of the supplemental stability footrest assembly and reinforcing cross bar of the present invention;
FIG. 8 is a first perspective view of the ash sweeping assembly, the stationary frame, etc. of the present invention;
FIG. 9 is a second perspective view of the ash sweeping assembly, the stationary frame, etc. of the present invention;
FIG. 10 is a schematic structural view of an ash sweeping assembly according to the present invention;
fig. 11 is an installation schematic diagram of a gel ink pen storage box, a partition plate and a vertical rod in the invention.
The pen-type dust collector comprises a display board 1, a vertical rod 2, a supporting foot 3, a roller 4, a reinforcing cross rod 5, a gel pen storage box 6, an ink dust receiving component 7, a slide rail 701, a receiving plate 702, an auxiliary stabilizing pedal component 8, a pedal 801, a pedal 802, a connecting sleeve II 803, a connecting vertical rod 804, a spring I, a dust sweeping component 9, a dust sweeping brush 901, a connecting cross rod 902, a spring II 903, an elastic uniform distribution plate 904, a baffle 905, a fixing frame 10, a fixing shaft I, a fixing shaft 12, a partition plate 13, an anti-skid convex block 14, a water containing groove 15, a wrench 16, a connecting ring 16 and a through hole 17.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying drawings 1 to 11, in conjunction with the embodiments.
Example 1
the lower surface of the supporting leg 3 is fixedly connected with a pair of rollers 4, the upper surface of the supporting leg 3 is fixedly connected with an upright rod 2, the upright rod 2 is fixedly connected to the middle position of the upper surface of the supporting leg 3, and the pair of rollers 4 are symmetrically distributed on the lower surface of the supporting leg 3 relative to the upright rod 2;
the outer side of the demonstration board 1 is fixedly sleeved with a fixed frame 10, and the fixed frame 10 is fixedly connected with the demonstration board 1 through screws; the left side and the right side of the fixed frame 10 are respectively and fixedly connected with a first fixed shaft 11 through connecting plates, and one end, far away from the fixed frame 10, of the first fixed shaft 11 penetrates through the top of the upright rod 2 and is in threaded connection with a fastening screw cap; the first fixed shaft 11 is rotatably connected with the upright rod 2 and is fixed through a fastening screw cap; a spanner 15 is fixedly connected to the fastening screw cover; the pair of upright posts are connected through a pair of reinforcing cross bars 5;
as shown in fig. 4 to 5, the ink dust receiving assembly 7 includes a slide rail 701 and a receiving plate 702, and a pair of slide rails 701 perpendicular to the fixing frame 10 is fixedly connected to the fixing frame 10; a sliding groove perpendicular to the fixed frame 10 is formed on the sliding rail 701; the left end and the right end of the bearing plate 702 are clamped inside the sliding grooves, the bearing plate 702 is supported through the sliding rails 701, and the upper surface of the bearing plate 702 is provided with a water containing groove 14;
as shown in fig. 6, the gel pen storage box 6 is fixedly connected to one upright rod 2 through a fixing sleeve, the gel pen storage box 6 is horizontally arranged right below the demonstration board 1, and an opening of the gel pen storage box 6 is upward;
as shown in fig. 7, the auxiliary stabilizing pedal assembly 8 includes a pedal plate 801, a first connecting sleeve 802, a second connecting sleeve 803, a vertical connecting rod 804 and a second fixed shaft, wherein the first connecting sleeve 802 is movably sleeved on the reinforcing cross rod 5 at a lower position, and the first connecting sleeve 802 can freely slide horizontally along the reinforcing cross rod 5; the bottom end of the connecting sleeve I802 is fixedly connected with a connecting vertical rod 804 which points to the ground vertically, and the bottom end of the connecting vertical rod 804 is fixedly connected with a horizontal fixed shaft II; a pair of second connecting sleeves 803 is fixedly connected to the side surface, close to the second fixing shaft, of the pedal plate 801, the second connecting sleeves 803 are respectively sleeved at two ends of the second fixing shaft, the second connecting sleeves 803 are rotatably connected with the second fixing shaft through bearings, and the vertical connecting rod 804 is connected with the pedal plate 801 through a first spring 805; the pedal 801 is fixedly connected with a connecting ring 16, the connecting vertical rod 804 is also fixedly connected with the connecting ring 16, and two ends of the first spring 805 are respectively hooked on the connecting ring 16; when the foot steps on the pedal 801, the pedal 801 rotates downwards to contact with the ground, and the first spring 805 is stretched in the process; when the pedal plate 801 is loosened, the first spring 805 is restored to the original length, and the pedal plate 801 tilts upwards under the restoring force of the first spring 805 to leave the ground; the lower surface of the footrest 801 is off the ground; the fixed frame 10 is provided with a dust sweeping component 9 in a matching way; the upper surface of the pedal plate 801 is fixedly connected with anti-skid convex blocks 13 for increasing the treading friction force, the anti-skid convex blocks 13 are mutually staggered, and the fixed frame 10 is provided with the dust sweeping assembly 9 in a matching way.
The working principle is as follows: by arranging the gel ink pen storage box 6, the gel ink pen can be independently stored, and a large amount of ink dust falling on the gel ink pen is prevented from being attached to the hands or clothes of a user; by arranging the ink ash receiving component 7, the ink ash receiving plate 702 can receive ink ash generated in writing and wiping, so that the ink ash is prevented from falling onto the ground, and the cleaning task amount is reduced; the water containing tank 14 is arranged on the receiving plate 702, so that ink dust accumulated on the receiving plate 702 can be prevented from flying and being sucked into a human body; the bearing plate 702 is connected with the demonstration device in a sliding way through a sliding rail 701, so that the demonstration plate 1 can be conveniently disassembled, assembled and washed; by arranging the auxiliary stable pedal assembly 8 and stepping on the pedal 801, the stability of the whole device can be improved by utilizing the rigid connection between the pedal 801 and the whole device, and the demonstration board 1 cannot shake during writing, so that the writing comfort and definition are improved; the pedal plate 801 can horizontally and freely slide along the reinforcing cross rod 5 through the connecting sleeve I802, a speaker can adjust the horizontal position of the pedal plate 801 according to the requirement of the self standing position, and the friction force of the pedal plate 801 can be improved by fixedly connecting a plurality of anti-skidding convex blocks 13 to the upper surface of the pedal plate 801; the pedal 801 is fixedly connected with the connecting vertical rod 804 through a first spring 805, and when the foot loosens the pedal 801, the pedal 801 tilts upwards under the restoring force of the first spring 805 to leave the ground; when the whole demonstration device moves, the pedal 801 cannot rub the ground; through fixedly connected with spanner 15 on fastening the spiral shell lid, can not directly fasten or not hard up the fastening spiral shell lid with the help of the instrument, be convenient for adjust the inclination of demonstration board 1.
Example 2
In this embodiment, the second spring 903 is in a compressed state, and the brush part of the dust brush 901 is under the compression action of the second spring 903, and one side of the dust brush 901, which is close to the demonstration board 1, is always tightly attached to the front surface of the demonstration board 1, so that the brush part of the dust brush 901 can clean the contact part of the fixed frame 10 and the demonstration board 1, the elastic force distribution board 904 can uniformly transmit the elastic force of the second spring 903 to the connection cross rod 902, and the connection cross rod 902 is pushed to horizontally and freely slide along the through hole 17, so that the ink dust received by the fixed frame 10 can be cleaned.
Example 3
In the present embodiment, the gel pen storage case 6 is divided into two areas by the partition plate 12, so that gel pens which are still usable and gel pens which are not yet usable can be separately stored, and can be taken out and used conveniently; the storage area of the usable gel ink pens is divided into independent storage spaces, so that the gel ink pens can be prevented from being stacked together.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An adjustable second-order differential equation derivation device comprises a demonstration board (1), a vertical rod (2), supporting legs (3), rollers (4) and a reinforcing cross rod (5), and is characterized by further comprising a gel pen storage box (6), an ink ash bearing assembly (7), an auxiliary stable pedal assembly (8) and an ash sweeping assembly (9);
the lower surface of the supporting leg (3) is fixedly connected with a pair of rollers (4), the upper surface of the supporting leg (3) is fixedly connected with an upright rod (2), the upright rod (2) is fixedly connected to the middle position of the upper surface of the supporting leg (3), and the pair of rollers (4) are symmetrically distributed on the lower surface of the supporting leg (3) relative to the upright rod (2);
a fixing frame (10) is fixedly sleeved on the outer side of the demonstration plate (1), and the fixing frame (10) is fixedly connected with the demonstration plate (1) through screws; the left side and the right side of the fixed frame (10) are respectively and fixedly connected with a first fixed shaft (11) through connecting plates, and one end, far away from the fixed frame (10), of the first fixed shaft (11) penetrates through the top of the vertical rod (2) to be in threaded connection with the fastening screw cap; the first fixed shaft (11) is rotationally connected with the vertical rod (2) and is fixed through a fastening screw cap; the pair of upright posts are connected through a reinforcing cross bar (5);
the ink ash receiving assembly (7) comprises a sliding rail (701) and a receiving plate (702), and a pair of sliding rails (701) vertical to the fixing frame (10) is fixedly connected to the fixing frame (10); a sliding groove vertical to the fixed frame (10) is formed in the sliding rail (701); the left end and the right end of the bearing plate (702) are clamped in the sliding chute, the bearing plate (702) is borne by the sliding rail (701), the inner side of the bearing plate (702) is tightly contacted with the fixed frame (10),
the gel pen storage box (6) is fixedly connected to one vertical rod (2) through a fixing sleeve, the gel pen storage box (6) is horizontally arranged right below the demonstration board (1), and an opening of the gel pen storage box (6) is upward; the gel ink pen storage box (6) is divided into two areas by a partition plate (12) which is vertically arranged, one area is used for storing gel ink pens in use, the other area is used for storing gel ink pens with exhausted ink, and the inside of the area used for storing the gel ink pens in use is divided into independent areas by a plurality of partition plates (12) in a criss-cross mode;
the auxiliary stable pedal assembly (8) comprises a pedal (801), a first connecting sleeve (802), a second connecting sleeve (803), a vertical connecting rod (804) and a second fixed shaft, wherein the first connecting sleeve (802) is movably sleeved on the reinforcing cross rod (5), and the first connecting sleeve (802) can horizontally and freely slide along the reinforcing cross rod (5); the bottom end of the connecting sleeve I (802) is fixedly connected with a connecting vertical rod (804) which points to the ground vertically, and the bottom end of the connecting vertical rod (804) is fixedly connected with a horizontal fixing shaft II; a pair of second connecting sleeves (803) is fixedly connected to the side face, close to the second fixing shaft, of the pedal plate (801), the second connecting sleeves (803) are respectively sleeved at two ends of the second fixing shaft, the second connecting sleeves (803) are rotatably connected with the second fixing shaft through bearings, and the vertical connecting rods (804) are connected with the pedal plate (801) through first springs (805); when a foot steps on the pedal plate (801), the pedal plate (801) rotates downwards to be in contact with the ground, and the first spring (805) is stretched in the process; when the pedal plate (801) is released, the first spring (805) restores to the original length, and the pedal plate (801) tilts upwards under the restoring force of the first spring (805) to leave the ground; the lower surface of the footboard (801) is away from the ground; the fixed frame (10) is provided with a dust sweeping assembly (9) in a matched manner.
2. The adjustable second order differential equation derivation device as claimed in claim 1, wherein the upper surface of the foot pedal (801) is fixedly connected with anti-skid bumps (13) for increasing the treading friction force, the anti-skid bumps (13) are staggered with each other.
3. The adjustable second order differential equation derivation device as claimed in claim 1, wherein the upper surface of the bearing plate (702) is provided with a water tank (14).
4. Adjustable second order differential equation derivation device according to claim 1, wherein a wrench (15) is fixedly connected to the fastening screw cap.
5. The adjustable second order differential equation derivation device of claim 1, wherein the reinforcement bars (5) are paired together, and the foot pedal (801) is fixedly connected to the reinforcement bar (5) at a lower position.
6. The adjustable second order differential equation derivation device as claimed in claim 1, wherein a connection ring (16) is fixedly connected to the pedal plate (801), a connection ring (16) is also fixedly connected to the connection vertical rod (804), and both ends of the first spring (805) are respectively hooked to the connection ring (16).
7. The adjustable second order differential equation derivation device according to claim 1, wherein a through hole (17) penetrating through the fixed frame (10) is formed in the fixed frame (10), the through hole (17) horizontally extends from the left side to the right side along the fixed frame (10), the dust sweeping component (9) comprises a dust sweeping brush (901), a connecting cross rod (902), a second spring (903), an elastic uniform distribution plate (904) and a baffle (905), the connecting cross rod (902) penetrates through the through hole (17), one end of the connecting cross rod (902) is exposed out of the front surface of the demonstration plate (1), the other end of the connecting cross rod (902) is exposed out of the back surface of the demonstration plate (1), one end of the connecting cross rod (902) located at the front surface of the demonstration plate (1) is fixedly connected with the dust sweeping brush (901), the dust sweeping brush (901) is located above the connecting cross rod (902), and the brush part of the dust sweeping brush (901) is in close contact with the fixed frame (10), connect horizontal pole (902) to be located demonstration board (1) back part cover and be equipped with elasticity equipartition board (904) and spring two (903), connect horizontal pole (902) to be located tip fixedly connected with baffle (905) at demonstration board (1) back, spring two (903) one end and elasticity equipartition board (904) fixed connection, the other end and baffle (905) fixed connection of spring two (903), elasticity equipartition board (904) and demonstration board (1) back in close contact with, spring two (903) are in compression state all the time.
8. The adjustable second order differential equation derivation device of claim 7, wherein the connecting cross bar (902) can slide freely along the through hole (17), and the dust sweeping brush (901) is always tightly attached to the front surface of the demonstration board (1) under the elastic force of the second spring (903).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111176003.7A CN114043811A (en) | 2021-10-09 | 2021-10-09 | Adjustable second-order differential equation derivation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111176003.7A CN114043811A (en) | 2021-10-09 | 2021-10-09 | Adjustable second-order differential equation derivation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114043811A true CN114043811A (en) | 2022-02-15 |
Family
ID=80205096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111176003.7A Pending CN114043811A (en) | 2021-10-09 | 2021-10-09 | Adjustable second-order differential equation derivation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114043811A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2617600Y (en) * | 2003-05-08 | 2004-05-26 | 王龙 | Dust and water filter on blackboard |
| CN204367729U (en) * | 2015-01-22 | 2015-06-03 | 杨静 | English teaching blackboard Wet-dry water conservancy diversion dust arrester |
| CN208882252U (en) * | 2018-10-15 | 2019-05-21 | 周培弘 | Automatic collecting device after a kind of sunning of agri-foodstuffs |
| CN208896707U (en) * | 2018-07-26 | 2019-05-24 | 成都瑞德利科技有限公司 | The green plate of Assembled sliding |
| CN210006267U (en) * | 2018-12-17 | 2020-01-31 | 吴渤 | training device for human resource management |
| CN211816531U (en) * | 2019-11-21 | 2020-10-30 | 山东省水利科学研究院 | Sediment discharging device that hydraulic engineering used |
| CN212036791U (en) * | 2020-03-26 | 2020-12-01 | 侯志英 | Economic law teaching auxiliary device |
-
2021
- 2021-10-09 CN CN202111176003.7A patent/CN114043811A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2617600Y (en) * | 2003-05-08 | 2004-05-26 | 王龙 | Dust and water filter on blackboard |
| CN204367729U (en) * | 2015-01-22 | 2015-06-03 | 杨静 | English teaching blackboard Wet-dry water conservancy diversion dust arrester |
| CN208896707U (en) * | 2018-07-26 | 2019-05-24 | 成都瑞德利科技有限公司 | The green plate of Assembled sliding |
| CN208882252U (en) * | 2018-10-15 | 2019-05-21 | 周培弘 | Automatic collecting device after a kind of sunning of agri-foodstuffs |
| CN210006267U (en) * | 2018-12-17 | 2020-01-31 | 吴渤 | training device for human resource management |
| CN211816531U (en) * | 2019-11-21 | 2020-10-30 | 山东省水利科学研究院 | Sediment discharging device that hydraulic engineering used |
| CN212036791U (en) * | 2020-03-26 | 2020-12-01 | 侯志英 | Economic law teaching auxiliary device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109043830A (en) | A kind of wooden drawing board of Fine Arts | |
| CN114043811A (en) | Adjustable second-order differential equation derivation device | |
| CN109050097A (en) | Moving type blackboard is used in a kind of education | |
| CN112006480A (en) | View show stand convenient to remove | |
| CN210126386U (en) | Novel deformable three-dimensional sketching easel | |
| CN116278467A (en) | Novel teaching aid for travelling English | |
| CN203888482U (en) | Combined structure of blackboard and blackboard eraser | |
| CN204451765U (en) | Dustless eraser | |
| CN210174497U (en) | Writing brush rack capable of recovering ink | |
| CN211918196U (en) | Combined teaching board for computer teaching | |
| CN207433126U (en) | A kind of toning dish structure | |
| CN216268370U (en) | Portable blackboard | |
| CN215725671U (en) | Equipment for testing flatness of wood board | |
| CN218756619U (en) | Washing machine with rollers capable of being stored | |
| CN216886034U (en) | Water color painting device for painting | |
| CN214873945U (en) | Portable fine arts painting brush belt cleaning device | |
| CN217409644U (en) | Folding horizontal bar | |
| CN211390824U (en) | Drawing board convenient to adjust for students | |
| CN215776310U (en) | Easel for preschool education convenient to change drawing paper | |
| CN208987915U (en) | A kind of toothbrush tilting brush-head structure | |
| CN219927350U (en) | Mathematics teaching board | |
| CN212066213U (en) | Integrative folding chair structure of wisdom desk | |
| CN211207675U (en) | English translation teaching board | |
| CN102670139A (en) | Sweeping device | |
| CN216623212U (en) | Visual transmission hand drawing board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220215 |