Intelligent blackboard eraser

Abstract

The intelligent blackboard eraser comprises a first shell and a second shell, the second shell is of a hollow square structure, a circular through hole is formed in the top face of the second shell, a fan is arranged at the position of the circular through hole, the inner wall of the circular through hole is detachably connected with a rear cover, and ventilation holes are formed in the side wall of the second shell; the second shell is detachably connected with the first shell, the first shell is of a square structure with an open upper end and a hollow interior, a protective shell is arranged in the first shell, a control module and a vibration motor are arranged in the protective shell, and the protective shell is detachably connected with the first shell; the control module comprises a controller, an attitude sensor, a voice module and a driving circuit; a felt plate is arranged on the bottom surface of the first shell, and the felt plate is detachably connected with the first shell; and a plurality of curved air ducts are arranged between the first shell and the second shell. The dust collection power is adjusted along with the wiping speed, the function of switching on and switching off is achieved according to voice instructions, and use is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to teaching tool technical field, concretely relates to an intelligent blackboard eraser. BACKGROUND

[0002] The blackboard eraser is used for erasing chalk marks on the blackboard and is used for writing work such as teaching. The blackboard eraser is mostly made of sponge, felt or brush as a cleaning part. After the sponge, felt or brush contacts the chalk marks on the blackboard, the chalk marks are erased, and part of the dust is adhered to the sponge, felt or brush, and part of the dust enters the air. Long-term inhalation of dust is not conducive to human health, and the surface of the sponge, felt or brush is completely covered with dust after being cleaned for many times, so it needs to be cleaned, so that the existing blackboard eraser is inconvenient to use, and therefore the intelligent blackboard eraser is developed.

[0003] The existing intelligent blackboard eraser is divided into two categories. One is a large blackboard eraser, which is used for quickly wiping the blackboard by means of a large mechanical device, such as CN114654921A. The advantage is fast and clean, and the disadvantage is complex installation, large size, not suitable for small area flexible wiping, and dust raising.

[0004] The second type is a small blackboard eraser, which has the advantages of flexibility, and the disadvantages of dust raising, especially when quickly wiping the blackboard, and the switching of the device is troublesome.

[0005] Therefore, an intelligent blackboard eraser that is convenient to use is needed. SUMMARY

[0006] The utility model discloses a kind of intelligent blackboard erasers to solve the problem of dust raising and inconvenience of existing blackboard eraser, realize dust absorption power with wiping speed adjustment, and according to the function of blackboard eraser posture, realize switching, it is convenient to use.

[0007] To achieve the above purpose, the utility model provides an intelligent blackboard eraser, including shell and felt plate, the shell includes first shell body and second shell body, the second shell body is internally hollow square structure, the top surface of second shell body is equipped with circular through-hole, the circular through-hole position is provided with fan, the inner wall of circular through-hole is detachably connected with back cover, the side wall of second shell body is equipped with vent hole;

[0008] The second shell body is detachably connected with the first shell body, and the first shell body is an internally hollow square structure with an open top end. A protective shell is arranged inside the first shell body. A control module and a vibration motor are arranged in the protective shell. The protective shell and the first shell body are detachably connected.

[0009] The control module includes a controller, a posture sensor, a voice module and a driving circuit.

[0010] A felt plate is arranged on the bottom surface of the first shell body, and the felt plate and the first shell body are detachably connected.

[0011] A plurality of curved air ducts are arranged between the first shell and the second shell.

[0012] Further, the rear cover is a circular ring structure, and the rear cover is threadedly connected with the second shell.

[0013] The vent hole is a long strip structure, and a dust screen is arranged on the rear cover and the vent hole.

[0014] The rear cover and the vent hole facilitate air flow between the first shell and the second shell and the curved air duct, and the dust screen arranged on the rear cover and the vent hole prevents dust in the second shell from flowing out of the rear cover and the vent hole when the air flows, thereby achieving the purpose of storing dust.

[0015] Further, the felt plate comprises felt and a connecting plate, and the felt is fixedly arranged at the lower end of the connecting plate in a square shape.

[0016] A T-shaped hole slot is formed in the side surface of the first shell, and the connecting plate is inserted with the first shell through the T-shaped hole slot.

[0017] The felt plate is designed in a modular manner, and the felt plate is inserted with the first shell through the T-shaped hole slot. The felt is a consumable, and the intelligent blackboard eraser can replace the felt plate for continuous use after the felt plate is damaged.

[0018] Further, a first square air hole is formed in the bottom surface of the first shell corresponding to the position of the felt, a second square air hole is formed in the bottom surface of the second shell corresponding to the first square air hole, and the first square air hole and the second square air hole are communicated through the curved air duct.

[0019] Further, the first shell and the second shell are snap-fit connected.

[0020] The first square air hole is fixedly connected with the curved air duct, and the curved air duct is inserted with the second square air hole.

[0021] The curved dust falling path of the curved air duct is relatively tortuous, thereby avoiding that the dust flows back to the outside in the moment when the dust loses the suction force of the fan.

[0022] Further, the protective shell is a square structure with a hollow interior and an open lower end, recesses are uniformly arranged on the bottom surface of the edge corners of the protective shell, protrusions are arranged on the upper end of the bottom surface of the first shell corresponding to the recesses, and the protective shell is inserted and fixed with the first shell.

[0023] The vibration motor is provided with a motor frame, and the vibration motor is fixed with the first shell through the motor frame.

[0024] The protective shell is fixed with the first shell by reverse screwing, the protective shell protects the electrical elements, and the protective shell and the first shell are detachably connected to facilitate internal circuit maintenance.

[0025] Further, the controller comprises an MCU chip, which is in communication connection with the attitude sensor.

[0026] Further, the driving circuit comprises a driving chip, an input end of the driving chip being connected with an output end of the MCU chip, and output ends of the driving chip being connected with the fan and the vibration motor respectively.

[0027] The fan and the vibration motor are connected with a power supply to form a loop.

[0028] The power supply is connected with a switch.

[0029] A key hole is arranged on a side surface of the first shell corresponding to the switch.

[0030] The voice module comprises an LD3320 voice recognition module, which is in communication connection with the MCU chip.

[0031] The embedded system is adopted, so that the circuit volume is small, the circuit structure is simple, and the integration and control are facilitated.

[0032] Through the above technical scheme, the utility model has the beneficial effects that:

[0033] 1. The utility model provides a hardware basis for dust absorption power adjustment according to wiping speed. A protective shell is arranged in the first shell, a control module and a vibration motor are arranged in the protective shell, a fan is arranged in the second shell, a curved air duct and a ventilation hole are combined, the fan is powered on during operation, floating dust swept by the felt plate is sucked into the curved air duct, and then the dust enters the second shell from the curved air duct, so that the dust is prevented from being scattered into the air. The control module comprises a controller, an attitude sensor and a driving circuit. The attitude sensor detects the attitude of the blackboard eraser. At different wiping speeds, the attitude sensor detects acceleration value change, the controller controls the rotating speed of the fan through the driving circuit, so that the suction force in the blackboard eraser and the wiping speed are matched.

[0034] 2. The existing blackboard eraser needs to be knocked to make dust separate when the felt plate is cleaned, and a large amount of dust floats in the air. The utility model can realize automatic cleaning of the felt plate. Voice instructions are collected through the voice module, the controller controls the vibration motor to be powered on and work, the vibration motor drives the felt plate to vibrate, dust on the felt plate is stirred up, and the felt plate is cleaned. At the same time, the controller controls the fan to work, and dust in the air is sucked into the second shell. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a structural schematic view of the intelligent blackboard eraser.

[0036] Figure 2Structure diagram two of the intelligent blackboard eraser;

[0037] Figure 3 Structure diagram three of the intelligent blackboard eraser;

[0038] Figure 4 Electrical principle diagram of the intelligent blackboard eraser.

[0039] The figure reference: 1 is first shell, 2 is second shell, 3 is fan, 4 is back cover, 5 is vent hole, 6 is protective shell, 7 is vibration motor, 8 is controller, 9 is attitude sensor, 10 is drive circuit, 11 is curved air duct, 12 is dust screen, 13 is felt, 14 is connecting plate, 15 is T-shaped hole groove, 16 is first square air hole, 17 is first square air hole, 18 is switch, 19 is voice module. DETAILED DESCRIPTION

[0040] The utility model will be further described in connection with the drawings and specific embodiment:

[0041] Example 1

[0042] As Figures 1-4 Intelligent blackboard eraser shown, including shell and felt board, the shell includes first shell 1 and second shell 2, the second shell 2 is the hollow square structure of inside, the top surface of second shell 2 is provided with round through hole, the round through hole position is provided with fan 3, the inner wall of round through hole is detachably connected with back cover 4, the side wall of second shell 2 is provided with vent hole 5;

[0043] Second shell 2 is detachably connected with first shell 1, and the first shell 1 is a hollow square structure with an open top end, the inside of the first shell 1 is provided with a protective shell 6, the protective shell 6 is provided with a control module and a vibration motor 7, and the protective shell 6 and the first shell 1 are detachably connected.

[0044] The control module includes a controller 8, an attitude sensor 9, a voice module 19 and a drive circuit 10.

[0045] The bottom surface of the first shell 1 is provided with a felt board, and the felt board and the first shell 1 are detachably connected.

[0046] A plurality of curved air ducts 11 are provided between the first shell 1 and the second shell 2.

[0047] The back cover 4 is a circular ring structure, and the back cover 4 is threadedly connected with the second shell 2.

[0048] The vent hole 5 is a long strip structure, and the back cover 4 and the vent hole 5 are provided with a dust screen 12.

[0049] The felt plate comprises a felt 13 and a connecting plate 14, the felt 13 is centrally fixed in a square shape at the lower end of the connecting plate 14;

[0050] The side surface of the first shell 1 is provided with a T-shaped hole slot 15, and the connecting plate 14 is inserted with the first shell 1 through the T-shaped hole slot 15.

[0051] The bottom surface of the first shell 1 is provided with a first square air hole 16 corresponding to the position of the felt 13, and a second square air hole 17 is provided on the bottom surface of the second shell 2 corresponding to the first square air hole 16, and the first square air hole 16 and the second square air hole 17 are communicated through the curved air duct 11.

[0052] The first shell 1 and the second shell 2 are connected by buckling;

[0053] The first square air hole 16 is fixedly connected with the curved air duct 11, and the curved air duct 11 is inserted with the second square air hole 17.

[0054] The protective shell 6 is a square structure with a hollow interior and an open lower end, and a plurality of grooves are uniformly arranged on the bottom surface of the corners of the protective shell 6, a plurality of protrusions are arranged on the upper end of the bottom surface of the first shell 1 corresponding to the grooves, and the protective shell 6 is inserted and fixed with the first shell 1.

[0055] The vibration motor 7 is provided with a motor frame, and the vibration motor 7 is fixed with the first shell 1 through the motor frame.

[0056] The controller 8 comprises an MCU chip, and the MCU chip is in communication connection with the attitude sensor 9.

[0057] The driving circuit 10 comprises a driving chip, the input end of the driving chip is connected with the output end of the MCU chip, and the output end of the driving chip is connected with the fan 3 and the vibration motor 7 respectively;

[0058] The fan 3 and the vibration motor 7 are connected with a power supply to form a loop;

[0059] The power supply is connected with a switch 18.

[0060] A key hole is arranged on the side surface of the first shell 1 corresponding to the switch 18.

[0061] The voice module 19 comprises an LD3320 voice recognition module, and the LD3320 voice recognition module is in communication connection with the MCU chip.

[0062] In the embodiment, the MCU chip adopts STM32 single-chip microcomputer, the attitude sensor 9 adopts MPU6050 six-axis attitude detection chip, the STM32 single-chip microcomputer and the MPU6050 six-axis attitude detection chip communicate through an I2C serial port. The driving chip adopts an L289N chip, the output end of the STM32 single-chip microcomputer is connected to the input end of the L289N chip, and the output end of the L289N chip is connected to the vibration motor 7 and the fan 3. The power supply includes a lithium battery and a charging circuit, a charging hole is arranged corresponding to the charging circuit, the charging circuit includes a BQ24210 chip, one end of the lithium battery is connected to the output end of the BQ24210 chip, and the other end of the lithium battery is connected to the MCU chip, the attitude sensor 9, the driving chip, the fan 3 and the vibration motor 7 through a switch 18.

[0063] The LD3320 voice recognition module is internally provided with an LD3320 chip, a microphone, an amplification circuit, a storage module and an STC11 single-chip microcomputer, the LD3320 chip is in communication connection with the STM32 single-chip microcomputer, the microphone is connected to the input end of the LD3320 chip through the amplification circuit, and the LD3320 chip is connected to the storage module through the STC11 single-chip microcomputer. The storage module is internally provided with recorded voice instructions, and the voice instructions include “power on”, “power off” and “mode switching”.

[0064] During operation, the switch 18 is pressed down, the switch 18 is closed, the MCU chip, the attitude sensor 9 and the driving chip are powered on and work, the user speaks the voice “power on”, the LD3320 voice recognition module recognizes and sends a working instruction to the MCU chip, the felt plate is directed to the blackboard, the MCU chip controls the fan 3 to be powered on through the driving chip, the fan 3 rotates, and the wind direction is from inside to outside. When the blackboard is wiped, dust falls off, the fan 3 rotates to generate airflow to attract dust in the air from the first square air hole 16 through the curved air duct 11 into the second square air hole 17 into the second shell 2 to complete collection. The faster the blackboard is wiped, the faster the dust falls off, and the greater the acceleration of the blackboard eraser is. According to the detection value of the attitude sensor 9, the MCU chip controls the fan 3 to increase the rotating speed in a PWM control mode, and then increases the wind speed and improves the dust attraction capacity. Conversely, the speed of wiping the blackboard changes from fast to slow, the acceleration of the blackboard eraser becomes small, and the MCU chip controls the fan 3 to become small in rotating speed.

[0065] The user speaks the voice “power off”, the LD3320 voice recognition module recognizes and sends a working instruction to the MCU chip, and the MCU chip controls the fan 3 to be powered off. The collected dust is poured out by opening the rear cover 4, and the second shell 2 is cleaned.

[0066] The user speaks the voice of "mode switching", the LD3320 voice recognition module recognizes and sends a working instruction to the MCU chip, the MCU chip controls the vibration motor 7 to work through the driving chip, the vibration motor sends high-frequency vibration, the vibration drives the blackboard eraser to shake the chalk powder on the felt, and the chalk powder falls off due to movement, and meanwhile the MCU chip controls the fan 3 to run at full power to suck the fallen chalk into the second shell 2.

[0067] The double-press switch 18 is pressed again, the switch 18 is disconnected, and the MCU chip, the posture sensor 9 and the driving chip are powered off.

[0068] The above-described embodiments are only preferred embodiments of the present application, and are not intended to limit the scope of the present application. Any equivalent changes or modifications made to the structure, features and principles described in the patent range of the present application should be included in the patent range of the present application.

Claims

1. An intelligent blackboard eraser comprising a housing and a felt board, characterized in that The shell comprises a first shell (1) and a second shell (2), the second shell (2) is a hollow square structure, a circular through hole is formed in the top surface of the second shell (2), a fan (3) is arranged at the position of the circular through hole, and a rear cover (4) is detachably connected to the inner wall of the circular through hole; The second shell (2) is detachably connected with the first shell (1), the first shell (1) is a hollow square structure with an open top end, a protective shell (6) is arranged in the first shell (1), a control module and a vibration motor (7) are arranged in the protective shell (6), and the protective shell (6) is detachably connected with the first shell (1); The control module comprises a controller (8), a posture sensor (9), a voice module (19) and a driving circuit (10); A felt plate is arranged on the bottom surface of the first shell (1), and the felt plate is detachably connected with the first shell (1); A plurality of curved air ducts (11) are arranged between the first shell (1) and the second shell (2).

2. The smart chalkboard eraser of claim 1, wherein, The rear cover (4) is a circular ring structure, and the rear cover (4) is threadedly connected with the second shell (2); The ventilation hole (5) is a long strip structure, and a dust screen (12) is arranged on the rear cover (4) and the ventilation hole (5).

3. The smart chalkboard eraser of claim 1, wherein, The felt plate comprises a felt (13) and a connecting plate (14), and the felt (13) is fixedly arranged at the lower end of the connecting plate (14) in a square shape. A T-shaped hole slot (15) is formed in the side surface of the first shell (1), and the connecting plate (14) is inserted into the T-shaped hole slot (15) of the first shell (1).

4. The smart chalkboard eraser of claim 3, wherein, A first square air hole (16) is formed in the bottom surface of the first shell (1) corresponding to the position of the felt (13), a second square air hole (17) is formed in the bottom surface of the second shell (2) corresponding to the first square air hole (16), and the first square air hole (16) and the second square air hole (17) are communicated through the curved air duct (11).

5. The smart chalkboard eraser of claim 4, wherein, The first shell (1) and the second shell (2) are connected by buckling; The first square air hole (16) is fixedly connected with the curved air duct (11), and the curved air duct (11) is inserted into the second square air hole (17).

6. The smart chalkboard eraser of claim 1, wherein, The protective shell (6) is a square structure with an open lower end and a hollow interior, recesses are uniformly arranged on the bottom surface of the corners of the protective shell (6), a plurality of protrusions are arranged on the top end of the bottom surface of the first shell (1) corresponding to the recesses, and the protective shell (6) is inserted and fixed with the first shell (1). The vibration motor (7) is provided with a motor frame, and the vibration motor (7) is fixed with the first shell (1) through the motor frame.

7. The smart chalkboard eraser of claim 1, wherein, The controller (8) comprises an MCU chip, and the MCU chip is in communication connection with the posture sensor (9).

8. The smart chalkboard eraser of claim 7, wherein, The driving circuit (10) comprises a driving chip, the input end of the driving chip is connected with the output end of the MCU chip, and the output end of the driving chip is connected with the fan (3) and the vibration motor (7) respectively; The fan (3) and the vibration motor (7) are connected with a power supply to form a loop; The power supply is connected with a switch (18). A key hole is arranged on the side of the first shell (1) corresponding to the switch (18).

9. The smart chalkboard eraser of claim 7, wherein, The voice module (19) comprises an LD3320 voice recognition module, which is in communication connection with the MCU chip.

Images