CN108583079B - A multi-color magnetic blackboard that can be freely erased - Google Patents

Abstract

The invention discloses a freely erasable multicolor magnetic blackboard, which comprises an outer frame, a support plate, a color surface, a color changing sheet, a magnetic sheet, a driving shaft, a sheave mechanism and a handle; the outer frame is a rectangular structural frame , the support plate is set inside the outer frame, pin shafts are set between two adjacent support columns in the same horizontal direction and between two adjacent support columns in the same vertical direction, and a pin shaft close to the outer frame is set A display surface that can rotate along the pin shaft, and two display surfaces that can rotate along the pin shaft are arranged on the other pin shafts; a magnetic sheet is arranged on the outside of each display surface, and four adjacent display surfaces form a cube pixel grid; each A color-changing sheet is arranged in a cube pixel grid, and the color-changing sheet is a disc with a gap; the color-changing sheet is driven to rotate by a helical gear and a sheave mechanism. The invention can eliminate the influence of chalk dust on the health of teachers and students, can save energy consumed in producing chalk, and reduce environmental pollution caused by producing chalk.

Description

A multi-color magnetic blackboard that can be freely erased

technical field

The invention relates to the field of blackboards used in teaching, in particular to a self-erasable multicolor magnetic blackboard.

Background technique

In today's society, blackboards are used in every elementary school, middle school and university teaching, and most schools use blackboards written with chalk. In the process of wiping the blackboard, dust is flying, which has a great impact on the health of teachers and students. As far as the link of chalk manufacturing is concerned, the energy consumed for manufacturing chalk every year is immeasurable, and the environmental pollution caused is also huge. At present, most of the magnetic blackboards on the market are unstable and easy to fade, and can only display two colors at most, and cannot realize multi-color writing and free erasing functions at the same time. For example, the application number is 201710279439.6, and the name is an invention of a magnetic dust-free environmental protection writing board (blackboard) tool. The application number is 201520267734.6, and the name is an invention of a magnetic blackboard. All cannot write several colors simultaneously on a blackboard.

Contents of the invention

Aiming at the deficiencies in the above-mentioned prior art, the present invention provides a multicolor magnetic blackboard that can be freely erased. The invention can write four colors at the same time, and can be freely erased by the blackboard eraser.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A multi-color magnetic blackboard that can be freely erased, including an outer frame, a support plate, a color surface, a color changing sheet, a magnetic sheet, a driving shaft, a groove wheel mechanism, and a handle;

The outer frame is a rectangular structural frame, the support plate is arranged in the outer frame, and a plurality of support columns are evenly arranged in a matrix on the front of the support plate, and each support column is vertically arranged on the support plate. The outer end is provided with a cross card slot, and a pin shaft is provided between two adjacent support columns in the same horizontal direction and between two adjacent support columns in the same vertical direction, and one end of the pin shaft is arranged on a In the groove of the cross card slot, the other end of the pin shaft is arranged in the slot of another adjacent cross card slot in the corresponding direction, and a display surface that can rotate along the pin shaft is arranged on the pin shaft close to the outer frame, and the rest Two display surfaces that can rotate along the pin shaft are arranged on the pin shaft; a magnetic sheet is arranged on the outside of each display surface, the N pole of the magnetic sheet faces the display surface, and four adjacent display surfaces form a cube pixel grid;

A color-changing sheet is set in each cube pixel grid, and the color-changing sheet is a circular sheet with a gap; the back of the support plate is arranged in a matrix with a plurality of color-changing sheet drive shafts, and each color-changing sheet drives The shaft vertically passes through the support plate and rotates with the support plate. One end of the front of each color change film drive shaft is fixedly connected with a color change film, and one end of the back of the color change film drive shaft is installed with a helical gear I. A helical gear driving shaft is arranged in each vertical direction, and a helical gear II corresponding to and meshing with the helical gears I in the row of vertical directions is arranged on each helical gear driving shaft; the driving shaft is arranged horizontally outside On the frame and in rotation with the outer frame, the drive shaft is provided with a helical gear III corresponding to and meshing with the helical gear II at one end of each helical gear drive shaft;

The output shaft driven by the sheave mechanism in the sheave mechanism is provided with a driving helical gear, and one end of the driving shaft is provided with a driven helical gear meshed with the teeth of the driving helical gear, and the handle drives the rotating arm in the sheave mechanism to rotate.

As a preferred solution of the present invention, the side length of the cube pixel lattice is 3mm.

As another preferred solution of the present invention, the upper color rendering surface of the cube pixel grid is a red display surface, the lower color rendering surface of the cube pixel grid is a blue display surface, and the left side of the cube pixel grid is The color rendering surface is a yellow display surface, and the color rendering surface on the right side of the cube pixel grid is a white display surface.

The technical effects of the invention are: the invention can eliminate the impact of chalk dust on the health of teachers and students, can save energy consumed in producing chalk, and reduce environmental pollution caused by producing chalk.

Description of drawings

Fig. 1 is a schematic diagram of the front structure of a multi-color magnetic blackboard that can be freely erased;

Fig. 2 is a schematic diagram of the back structure of a multi-color magnetic blackboard that can be freely erased;

Fig. 3 is a schematic structural diagram of a cube pixel grid;

In the figure, 1—outer frame; 2—support plate; 3—support column; 4—cross card slot; 5—pin shaft; 6—color surface; 7—magnetic sheet; 8—color changing sheet; 9—color changing 10—helical gear Ⅰ; 11—helical gear drive shaft; 12—helical gear Ⅱ; 13—driving shaft; 14—helical gear Ⅲ; 15—groove mechanism; 16—driven helical gear; 17—handle ; 151--slotted wheel; 152--disc.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 and 2, a multi-color magnetic blackboard that can be freely erased includes an outer frame 1, a support plate 2, a color surface 6, a color changing sheet 8, a magnetic sheet 7, a drive shaft 13, and a sheave Mechanism 15 and handle 17. In this embodiment, "front" refers to the front of the blackboard, and "rear" refers to the back of the blackboard.

The outer frame 1 is a rectangular structural frame, and the support plate 2 is arranged in the outer frame 1. The front of the support plate 2 is arranged in a matrix with a plurality of support columns 3, and each support column 3 is vertically arranged on the support plate 2. The outer end is provided with a cross card slot 4, and pin shafts 5 are arranged between adjacent two support columns 3 in the same horizontal direction and between adjacent two support columns 3 in the same vertical direction, and one end of the pin shaft 5 Set in the groove of a cross card slot 4, the other end of the pin shaft 5 is set in the slot of another adjacent cross card slot 4 in the corresponding direction, and a pin shaft 5 close to the outer frame 1 is arranged on the The pin shaft 5 is a display surface 6 that rotates, and the remaining pin shafts 5 are provided with two display surfaces 6 that can rotate along the pin shaft 5 . A magnetic sheet 7 is arranged on the outside of each display surface 6. In this embodiment, the magnetic sheet 7 is arranged in a groove on the outside of the display surface 6. The N poles of the magnetic sheet 7 face the display surface 6, and the adjacent four Each display surface 6 constitutes a cube pixel grid, and the structure of the cube pixel grid is shown in FIG. 3 .

A color-changing sheet 8 is arranged in each cube pixel grid, and the color-changing sheet 8 is a disc with a gap. The back of the support plate 2 is arranged in a matrix evenly with a plurality of color-changing drive shafts 9, and each color-changing drive shaft 9 passes through the support plate 2 vertically and rotates with the support plate 2, and each color-changing drive shaft 9 One end of the front is fixedly connected with a color-changing piece 8, and one end of the back of the color-changing piece drive shaft 9 is installed with a helical gear I10, and a helical gear drive shaft 11 is arranged on each vertical direction in the matrix, and each helical gear The drive shaft 11 is provided with a helical gear II 12 corresponding to and meshing with the helical gear I 10 in the vertical direction; The helical gear II12 at one end of the helical gear drive shaft 11 corresponds to and meshes with the helical gear III14. The size and number of grooves of the helical gear I10, the helical gear II12 and the helical gear III14 are the same.

A driving helical gear is set on the output shaft driven by the sheave mechanism 15, and one end of the driving shaft 13 is provided with a driven helical gear 16 meshed with the teeth of the driving helical gear, and the handle 17 drives the rotating arm in the sheave mechanism 15 to rotate. The sheave mechanism 15 is a prior art. In the present embodiment, the sheave mechanism 15 adopts a single-arm externally meshing sheave mechanism, and the sheave 151 of the single-arm externally meshing sheave mechanism is in the opposite direction to the rotating arm. The single-arm external meshing sheave mechanism is made up of a rotating arm with straight pins, a sheave 151 with 4 radial grooves and a frame. When the straight pin on the continuously rotating arm enters the radial groove, the sheave 151 is driven to rotate; when the straight pin turns out of the radial groove, the sheave 151 stops rotating. The rotating arm rotates a circle, and the grooved wheel completes a rotation-stop motion. In order to ensure that the sheave stops, a notch disc 152 can be affixed on the rotating arm, and its circumference matches the concave circumference on the sheave 151 . In this way, the rotation of the pivoted arm is not affected, and the sheave 151 can be locked.

The side length of the cube pixel grid is 3 mm. The color rendering surface on the upper side of the cube pixel grid is the red display surface, the color rendering surface below the cube pixel grid is the blue display surface, the color rendering surface on the left side of the cube pixel grid is the yellow display surface, and the color rendering surface on the right side of the cube pixel grid is the yellow display surface. The display surface is white.

One color surface represents one pixel surface, and four pixel surfaces form a cube pixel grid. The upper, lower, left, and left sides of the cube pixel grid are four color rendering surfaces respectively. The front side of the cube pixel grid is a transparent surface, and the back side For the black side. The magnetic sheet is fixed in the groove on the back of each color-developing surface, and the N-pole face faces the color-developing surface. The color-changing sheet 8 is a circular sheet with a gap. The color-changing sheet 8 is located in the pixel grid of the cube. The direction of the gap determines the color written by the N-pole magnetic pen, that is, the display surface corresponding to the gap can be transferred to the cube through the gap. The front side of the pixel grid. The color-changing sheet 8 is connected with the color-changing sheet drive shaft 9 . The grooved wheel mechanism 15 drives the driven helical gear 16 through the driving helical gear, and then drives the driving shaft 13 to rotate, and the helical gear III14 on the driving shaft 13 drives the helical gear II12 to rotate, and then drives the helical gear drive shaft 11 to rotate, and the whole helical gear II12 drives The helical gear I10 meshed with it rotates, thereby driving the color-changing film drive shaft 9 to rotate. The sheave 151 in the sheave mechanism 15 rotates 90 degrees and promptly drives the color changing piece 8 to rotate 90 degrees. The pin shaft 5 is located on the four sides of the front side of the cube pixel grid, and the rotation of one of the four color-developing surfaces is determined by controlling the position of the gap of the color-changing sheet 8 . The color-changing sheet 8 drives it to rotate through the sheave mechanism 15 and the helical gear. When the S pole writing pen touches a certain cube pixel grid, the color-developing surface 6 facing the notch in the cube pixel grid will be turned to the front side. When the blackboard eraser with N polarity touches a certain cube pixel grid, the color rendering surface 6 turned inside out to the front side of the cube pixel grid will be pushed back because the same polarity repels each other. Through the above method, the multi-color magnetic blackboard of the present invention can eliminate the impact of chalk dust on the health of teachers and students, can save energy consumed in producing chalk, and reduce environmental pollution caused by chalk production.

In this embodiment, the handle 17 is connected with the straight pin at the center of the pivoting arm in the sheave mechanism 15, and the pivoting arm rotates one circle, the sheave 151 in the sheave mechanism 15 rotates 90 degrees, and the handle can control the color changing piece to rotate 90 degrees.

In the initial state, the gap of the color-changing sheet 8 is downward, that is, blue characters can be written by using the N-pole magnetic writing pen at this time. Rotate the handle 17 and turn it once, the rotating arm connected with the handle 17 will rotate one turn thereupon, and the sheave 151 will rotate 90 degrees under the driving of the rotating arm. The driving helical gear on the power output shaft on the sheave 151 and the driven helical gear 16 mesh with each other, that is, the driving helical gear and the driven helical gear rotate 90 degrees. The helical gear II 12 and the helical gear drive shaft 11 are driven by the helical gear III 14 on the driving shaft 13 to rotate 90 degrees, and the helical gear Ⅱ 12 synchronously drives the helical gear Ⅰ 10 and the color change film drive shaft 9 to rotate 90 degrees, and the color change drive shaft 9 drives the color changer Color chip 8 is rotated 90 degrees. If the color-changing sheet 8 rotates 90 degrees clockwise at this time, use the N pole magnetic writing pen to write the touched cube pixel grid, the yellow color surface rotates 90 degrees around the color surface around the pin axis 5, and the left side of the cube pixel grid The side is rotated to the front of the cube pixel grid, so that the path of the writing pen can leave yellow writing.

The multi-color magnetic blackboard of the present invention only erases the words of one color in each operation in the step of erasing the writing on the blackboard. If the gap of the color-changing sheet 8 faces to the right at this moment, the color that the S pole magnetic blackboard eraser can erase is white. When a certain white display surface is on the front side of the cube pixel grid, the S pole magnetic blackboard eraser touches the cube pixel grid, and the white color rendering surface rotates around pin 5 from the front side of the cube pixel grid to the right side. If you need to erase four colors, you need to turn the handle for one week after each color is erased, and then erase another color. Repeat the operation four times to erase all colors.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (3)

1. A multi-color magnetic blackboard that can be freely erased is characterized in that: it includes an outer frame (1), a support plate (2), a color surface (6), a color-changing sheet (8), a magnetic sheet (7) ), driving shaft (13), sheave mechanism (15) and handle (17); The outer frame (1) is a rectangular structural frame, the support plate (2) is arranged in the outer frame (1), and a plurality of support columns (3) are uniformly arranged in a matrix on the front of the support plate (2), each A support column (3) is vertically arranged on the support plate (2), and the outer end of the support column (3) is provided with a cross card slot (4). Between two adjacent support columns (3) in the same horizontal direction A pin shaft (5) is arranged between two adjacent support columns (3) in the same vertical direction, and one end of the pin shaft (5) is arranged in a groove of a cross card slot (4), and the pin shaft (5) The other end of the shaft (5) is set in the groove of another adjacent cross card slot (4) in the corresponding direction, and a pin shaft (5) close to the outer frame (1) is provided to move along the pin shaft (5). ) rotating display surface (6), and two display surfaces (6) that can rotate along the pin axis (5) are set on the remaining pin shafts (5); a magnetic sheet ( 7), the N pole of the magnetic sheet (7) faces the display surface (6), and the four adjacent display surfaces (6) form a cube pixel grid; A color-changing sheet (8) is arranged in each cube pixel grid, and the color-changing sheet (8) is a disc with a gap; the back of the support plate (2) is arranged in a matrix and evenly distributed with a plurality of color-changing sheets Drive shaft (9), each color-changing film drive shaft (9) vertically passes through the support plate (2) and rotates with the support plate (2), and one end of the front of each color-changing film drive shaft (9) is connected to a The color-changing sheet (8) is fixedly connected, and a helical gear I (10) is installed at one end of the back of the color-changing sheet drive shaft (9), and a helical gear drive shaft (11) is arranged on each vertical direction in the matrix, Each helical gear drive shaft (11) is provided with a helical gear II (12) corresponding to and engaged with the helical gear I (10) in the vertical direction of the corresponding row; the driving shaft (13) is horizontally arranged on the outer frame (1) and rotate with the outer frame (1), the drive shaft (13) is provided with helical gears that correspond to and mesh with the helical gear II (12) at one end of each helical gear drive shaft (11) III(14); A driving helical gear is set on the output shaft driven by the sheave wheel in the described sheave mechanism (15), and one end of said driving shaft (13) is provided with a driven helical gear (16) meshed with the driving helical gear teeth, and said handle ( 17) drive the rotating arm in the sheave mechanism (15) to rotate. 2. A freely erasable multi-color magnetic blackboard according to claim 1, characterized in that: the side length of the cube pixel grid is 3mm. 3. A kind of freely erasable multi-color magnetic blackboard according to claim 1, characterized in that: the color rendering surface above the cube pixel grid is a red display surface, and the color surface below the cube pixel grid is The color rendering surface is a blue display surface, the color rendering surface on the left side of the cube pixel lattice is a yellow display surface, and the color rendering surface on the right side of the cube pixel lattice is a white display surface.