CN203844472U

CN203844472U - Automatically-erasable chalkboard

Info

Publication number: CN203844472U
Application number: CN201320872391.7U
Authority: CN
Inventors: 孙佳钰; 闵玉强; 谢鑫; 孟宝霞; 马永峰
Original assignee: Lanzhou Jiaotong University
Current assignee: Lanzhou Jiaotong University
Priority date: 2013-12-27
Filing date: 2013-12-27
Publication date: 2014-09-24
Anticipated expiration: 2023-12-27

Abstract

The utility model discloses an automatically-erasable chalkboard comprising a face board, an electric roll brush, an in-situ end limit switch, an endpoint limit switch, a motor, a roller, a roll brush guide rail and a roller guide rail. The roll brush guide rail is horizontally mounted at the top end of the front surface of the face board; the in-situ end limit switch and the endpoint limit switch are mounted at two ends of the roll brush guide rail respectively; a slide head is arranged at the top end of the electric roll brush and is in sliding fit with the roll brush guide rail; the bottom end of the electric roll brush is fixedly connected with the motor; the roller guide rail is mounted at the bottom end of the face board; the roller is placed in the roller guide rail and is fixedly connected with a transmission rod of the motor; the two limit switches, the motor and other switches are connected through an electric circuit; the in-situ end limit switch is serially connected with a selector switch. The automatically-erasable chalkboard has the advantages that the chalkboard can be automatically and repeatedly erased, the fact that teachers or students waste labor and time on erasing the chalkboard is avoided, teaching quality is guaranteed, large-range spread of dust is avoided, and indoor air pollution is avoided.

Description

A kind of blackboard that can auto-erasing

Technical field

The utility model relates to a kind of realia manufacturing technology field, especially a kind of blackboard that can auto-erasing.

Background technology

As everyone knows, blackboard is teacher's impart knowledge one of the most indispensable educational aid, and its importance is self-evident.But, nowadays blackboard function is very single, no matter be that teacher or student can only carry out wiping with blackboard eraser when blackboard wiping is revised wrong or cleaning, and manually wiping, this is all to waste very much physical thing for academics and students, and teacher manually erases the board and can take the time of much attending class, virtually shortened instructional blocks of time, affected quality of instruction.Therefore, provide a kind of blackboard that can auto-erasing very necessary.

Utility model content

The utility model is for the deficiencies in the prior art, a kind of blackboard that can auto-erasing is proposed, realize the wiping repeatedly automatically of blackboard, teacher or student's blackboard wiping waste muscle power and time have been avoided, guaranteed quality of instruction, and avoided dust to fly away on a large scale, avoided the pollution of room air.

In order to realize above-mentioned utility model object, the utility model provides following technical scheme:

Blackboard that can auto-erasing, comprises panel, electric roller brush, original position end travel switch, destination terminal travel switch, motor, roller, round brush guide rail and rolling wheel guide rails,

Described round brush guide rail level is arranged on described panel front face top, and two described travel switches are arranged on respectively described round brush guide rail two ends,

Described electric roller brush top is provided with slippery fellow, and this slippery fellow and described round brush guide rail are slidably matched, and described electric roller brush bottom is fixedly connected with described motor,

In described panel bottom, rolling wheel guide rails is installed, described roller is placed in described rolling wheel guide rails and is fixedly connected with the drive link of described motor,

Two described travel switches, described motor and each switches connect by automatically controlled circuit,

Described original position end travel switch is connected with selector switch,

In described round brush guide rail bottom, be provided with chute, the bearing of trend of described chute upwards connects described round brush guide rail with the identical of described round brush rail length and the party, and this chute coordinates with described slippery fellow,

On the sidewall of described chute, be provided with the stopper slot that bearing of trend is identical with described chute bearing of trend, on described slippery fellow, be provided with block, described block and described stopper slot are slidably matched,

When described slippery fellow is positioned at described round brush guide rail two ends, described block pushes respectively and between the described travel switch of correspondence position.

Further, described terminal travel switch and described detachable connection of round brush guide rail.

Further, described original position end travel switch and described destination terminal travel switch are Automatic-reset.

Further, described motor is threephase asynchronous.

A kind of blackboard that can auto-erasing of the utility model, realize the wiping repeatedly automatically of blackboard, teacher or student's blackboard wiping waste muscle power and time have been avoided, guaranteed quality of instruction, and each wiping is to the long distance motion of a direction, while having avoided manual wiping, arm swings flying away of a large amount of dust kick up among a small circle fast, has guaranteed pure and fresh and teacher student healthy of room air.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of a kind of blackboard that can auto-erasing described in the utility model;

Fig. 2 is the schematic perspective view of round brush guide rail described in the utility model;

Fig. 3 is that schematic diagram is looked on a left side for round brush guide rail described in the utility model;

Fig. 4 is the schematic perspective view of electric roller brush described in the utility model;

Fig. 5 is the motion schematic diagram of electric roller brush described in the utility model, and wherein arrow represents the direction of motion of electric roller brush;

Fig. 6 is the circuit diagram of a kind of blackboard that can auto-erasing described in the utility model.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is described in detail, the description of this part is only exemplary and explanatory, should not have any restriction to protection domain of the present utility model.

A kind of blackboard that can auto-erasing as Figure 1-4, comprise panel 1, electric roller brush 2, original position end travel switch STa3, destination terminal travel switch STb4, motor 5, roller 6, round brush guide rail 7 and rolling wheel guide rails 8, original position end travel switch STa3 and destination terminal travel switch STb4 are Automatic-reset, motor 5 is threephase asynchronous

Round brush guide rail 7 levels are arranged on panel 1 front face top, and two travel switches are arranged on respectively round brush guide rail 7 two ends,

Electric roller brush 2 tops are provided with slippery fellow 21, and this slippery fellow 21 is slidably matched with round brush guide rail 7, and electric roller brush 2 bottoms are fixedly connected with motor 5,

In panel 1 bottom, rolling wheel guide rails 8 is installed, roller 6 is placed in rolling wheel guide rails 8 after being fixedly connected with the drive link of motor 5, in the interior rolling of rolling wheel guide rails 8,

Two travel switches, motor 5 and each switches connect by automatically controlled circuit,

Original position end original position end travel switch STa3 connects with selector switch SW.

In round brush guide rail 7 bottoms, be provided with chute 71, the bearing of trend of chute 71 is with the identical of round brush guide rail 7 length and upwards connect round brush guide rail 7 the party, and this chute 71 coordinates with foxy 21.

On the sidewall of chute 71, be provided with the stopper slot 711 that bearing of trend is identical with chute 71 bearing of trends, on foxy 21, be provided with block 211, block 211 is slidably matched with stopper slot 711, and block 211 is for pressing two travel switches that lay respectively at round brush guide rail 7 two ends.

Destination terminal travel switch STb4 is connected with round brush guide rail 7 is detachable, in the time of need to cleaning electric roller brush 2, destination terminal travel switch STb4 can be disassembled from round brush guide rail 7, then electric roller brush 2 is disassembled and cleaned from round brush guide rail 7.

Panel 1 is for writing, and electric roller brush 2 can carry out wiping by automatic reciprocating counter plate 1.

As shown in Fig. 6 and Fig. 5, be respectively a kind of circuit diagram of blackboard that can auto-erasing and the schematic diagram of electric roller brush 2 motions, the as can be seen from the figure course of work of the present utility model.

In control circuit, the moving together contact of original position end travel switch STa3 is connected with selector switch SW.Generally before formal starting, SW is in off-state, and closed SW again after pressing starting button SB1 starting, can avoid power turn-on circuit to start voluntarily like this.When SW is closed, circuit can be realized automatic reciprocating control; When SW disconnects, circuit can only be realized and advancing and auto-returned control.

When electric roller brush 2 is positioned at original position end travel switch STa3 place, block 211 is depressed original position travel switch original position end travel switch STa3.The break contact of original position end travel switch STa3 disconnects reversion control loop, the moving together contact closed (now SW disconnects) of original position end travel switch STa3.Press starting button SB1, motor 5 forward driving electric round brush 2 advance.

When electric roller brush 2 is reached home, block 211 is depressed destination terminal travel switch STb4, and the break contact of destination terminal travel switch STb4 disconnects forward control loop, and motor 5 stops forward.Simultaneously, the moving together contact of destination terminal travel switch STb4 is closed, the contactor KMR that makes to reverse obtains electric, motor 5 starts reversion, electric roller brush 2 retreats, when electric roller brush 2 is return original position, block 211 is depressed again original position end travel switch STa3 (Automatic-reset), the break contact of original position end travel switch STa3 disconnects reverse turn control circuit, the moving together contact closed (now SW is closed) of original position end travel switch STa3, the contactor KMF that makes to overturn obtains electric, motor 5 driving electric round brush 2 advance, realized and having automatically moved back and forth, and finally realize the effect of writing on erasing blackboard.

Claims

1. a blackboard that can auto-erasing, is characterized in that, comprises panel, electric roller brush, original position end travel switch, destination terminal travel switch, motor, roller, round brush guide rail and rolling wheel guide rails,

2. a kind of blackboard that can auto-erasing as claimed in claim 1, is characterized in that described terminal travel switch and described detachable connection of round brush guide rail.

3. a kind of blackboard that can auto-erasing as claimed in claim 1, is characterized in that, described original position end travel switch and described destination terminal travel switch are Automatic-reset.

4. a kind of blackboard that can auto-erasing as claimed in claim 1, is characterized in that, described motor is threephase asynchronous.