CN86202504U

CN86202504U - Electrical dust-absorbing blackboard eraser

Info

Publication number: CN86202504U
Application number: CN 86202504
Authority: CN
Inventors: 朱红; 李延义; 程国琇
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-04-19
Filing date: 1986-04-19
Publication date: 1987-05-13

Abstract

The utility model discloses a rod-shaped rolling blackboard eraser which can automatically absorb the dust and is composed of a rod-shaped rolling erasing brush driven by a miniature motor. When in use, when any one of four wheel disks of the bottom part of the blackboard eraser touches blackboards, a power supply can be automatically switched on, and the miniature motor rotates at high speed to accordingly drive the rod-shaped rolling erasing brush to rotate. The chalk writing is erased when rotating, and the erased dust can be automatically absorbed into a dust storing chamber along the rotary inertia of the rolling erasing brush.

Description

Electrical dust-absorbing blackboard eraser

The present invention relates to a kind of improved blackboard eraser, particularly a kind of when crocus writing, can suck the blackboard eraser of powder ash automatically, be the indispensable instrument of classroom instruction.

Existing blackboard eraser is trimed and is bumped into the plate blackboard eraser that felt is formed by metal.It can only play the effect of wiping chalk writing, and the powder ash under wiping flies upward everywhere, influences environmental sanitation and teaching mood, and this powder ash of for years on end like this suction is bigger to the health hazard of Faculty and Students.

Task of the present invention is that a kind of improved blackboard eraser will be provided, it is plate blackboard eraser with the past, change electronic excellent type Rolling blackboard into and wipe, its can limit be close to chalk dust is sucked in the dust pocket in the blackboard eraser automatically, has fundamentally removed the phenomenon that fly upward the full chamber of chalk dust.

The present invention is that following mode is finished: the loam cake of the shell of blackboard eraser and lower cover are hard plastic mold materials.There is an excellent type rolling brushing by minitype motor driving its inside.During use, blackboard eraser is blackboard at a touch, and power supply is just connected automatically, micromachine rotates at a high speed, drives excellent type rolling brushing rotation by transmission device, is about to chalk writing and wipes clean in rotation, powder ash under it is wiped, the brushing rotatory inertia is drawn in the dust pocket in the blackboard eraser automatically thereupon.Because blackboard eraser bottom is equipped with the rubber-like small trochal disc respectively for four jiaos, when blackboard eraser one touches blackboard, wheel disc is compressed into, and power supply is promptly connected, and the micromachine rotation by transmission device, drives excellent type rolling brushing rotation.Blackboard eraser also can directedly move, and in a single day scrubbing brush leaves blackboard, and wheel disc ejects, and power supply cuts off automatically, and is easy to use.

Below with reference to accompanying drawing invention is described in further detail.

Fig. 1 is a kind of concrete structure transverse cross-sectional view of the present invention.

Fig. 2 is a side view of the present invention.

With reference to Fig. 1, the shell of blackboard eraser divides plastic bottom cover (1) and loam cake (2) two parts, and screw (3) is in order to fastening bottom (1) and loam cake (2).Micromachine (4) by transmission device (5), drives excellent type rolling brushing (6).The power switch of micromachine (4) is by spring (7), and contact-making switch (8) and moving plate (9) are formed, and it is contained in respectively on four wheel discs (10).During use, arbitrary wheel disc (10) of blackboard eraser, blackboard at a touch, spring (7) compresses, and moving plate (9) touches mutually with contact-making switch stator (8), then power connection.Rod type rolling brushing (6) is driven and rotation at a high speed by micromachine (4).Have only when four wheel discs (10) when all leaving blackboard, spring (7) ejects, and moving plate (9) is thrown off with contact-making switch stator (8), then dump.There is a dodge gate (12) dust pocket (11) in the blackboard eraser, on the door self-lock switch (13) is arranged, and presses self-lock switch (13) with hand one, and dodge gate (12) can be opened.Powder ash in the dust pocket (11) is promptly pourable.

Claims

1,, it is characterized in that micromachine [4] drives excellent type rolling brushing [6] rotation by plastic casing bottom [1], loam cake [2], micromachine [4], excellent type rolling brushing [6], dust pocket [11] with the electric dust absorption blackboard eraser that four wheel discs [10] of power switch are formed is housed.

2,, it is characterized in that the rotating speed of micromachine (4) being become the rotating speed of excellent type rolling brushing (6) by transmission device (5) according to the described electric dust absorption blackboard eraser of claim 1.

3,, it is characterized in that its four spring (7), contact-making switch stator (8) and moving plate (9) being housed respectively above the wheel disc forms power switch according to the described electric dust absorption blackboard eraser of claim 1.

4,, it is characterized in that there is a dodge gate (12) described dust pocket (11) according to the described electric dust absorption blackboard eraser of claim 1.

5,, it is characterized in that a self-lock switch (13) is arranged on the dodge gate (12) according to the described electric dust absorption blackboard eraser of claim 4.