CN2154789Y

CN2154789Y - Dustless eraser

Info

Publication number: CN2154789Y
Application number: CN 92215872
Authority: CN
Inventors: 陈明一
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-16
Filing date: 1992-07-16
Publication date: 1994-02-02
Anticipated expiration: 2002-07-16

Abstract

The utility model relates to a dustless eraser, whose structural shape is similar with the traditional blackboard eraser. Under not changing the custom of the traditional use of the eraser, the utility model overcomes the drawback that the dust flying affect the health and obstruct the sanitation. The utility model is characterized in that the erasing face is composed of a group of rotatable rollers, and the erasing face of the roller can rotate inwards and outwards 180 DEG, and is closely contacted with a rod-shaped dust removing rotating brush. When rotating outwards, the erasing face of the roller can used as the erasing face, and when rotating inwards, the rotating brush is used to remove the dust, and the utility model is provided with a dust collecting chamber and a sealing gasket.

Description

Dustless eraser

The utility model relates to a kind of culture and education apparatus.

Existing blackboard brush is to make the plane with carpet to wipe face, and dust from flying during erasing impairs one's health.When a kind of blackboard brush erasing is arranged dust is pressed into carpet and wipes the face slit, do not make and fly upward, but the amount of being pressed into is limited, will remove frequently, influence is taught.Other has a kind of improved blackboard eraser, adopts lift-over erasing structure, dust is rolled daub into blackboard brush inside.But smear untotally, and dust can also fly poplar by the slit and come out.

The purpose of this utility model is that a kind of drum-type erasing structure will be provided, and cylinder does not change during erasing, and the dust that oppositely will smear adhesion during erasing rolls in the box.The round brush that rotates by following the erasing action drops on dust brush on the cylinder in the box, and wiping face slit shelves rod is arranged, and prevents a kind of new no-dust blackboard eraser that dust spills.

The utility model is realized as follows:

Erasing face is one group of rotatable cylinder, and the drum eraser face can inside and outside Rotate 180 °, serves as wiping face in the time of outwardly, changes brush with bar-shaped dedusting in the time of inwardly and closely contact, brushes the removing dust by commentaries on classics.Wipe the gear that action is rotated with smearing for one group, drive the dedusting brush and rotate, and dust retaining poplar rod, gasket seal, only needle roller and dust collection chamber are arranged.

Bar-shaped cylinder brushing 6 is fixed together with brushing pilot pin 15, locating part 16 makes the cylinder can only left and right Rotate 180 °, and dedusting rotary brush 7 links with driving gear set 11, and by gear travel(l)ing rest 13, spring 14 links with rubber wheel 12, is covered by tooth cover 17.Be installed in the support 4 on the housing 1, idler pulley brushing and rotary brush.By being loaded on housing, the housing inner edge serves as a contrast gasket seal 10 to seal bar 9, and dirt pocket 2 is arranged by securing member 8, and laying dust chamber 3 is accumulated dust and discharged by ash-draining gate 5.On the structure, make rubber take turns the contact surface of 12 contact-making surfaces summary above cylinder brushing 6.

Accompanying drawing 1 is the structural profile side view;

Pilot pin position when accompanying drawing 2 is wiped from left to right for brushing;

Pilot pin position when accompanying drawing 3 is wiped from right to left for brushing;

Accompanying drawing 4 is the rotary brush transmission mechanism.

Describe details of the present utility model and working condition in detail below in conjunction with accompanying drawing.

During the erasing blackboard, rubber wheel 12 contacts with blackboard earlier, because support 13, the movable telescopic of spring 14, erasing is defeated rubber and is taken turns inside indentation, and bar-shaped cylinder brushing 6 just contacts with blackboard, and brushing 6 is with erasing Rotate 180 °, pilot pin 15 limited products 16 stop no longer cylinder, and brushing 6 is by a end erasing blackboard.When reverse erasing, brushing 6 counter-drum are stopped no longer by reverse limited part 16 behind the Rotate 180 ° and roll, and the b end of brushing 6 contacts the erasing blackboard with the plate face.The sticking lotus of a end the dust after the wiping, is rolled into and brush 7 contacted positions, is subjected to the brush cleaning that rotates with the erasing action, and dust is fallen into ash accumulating chamber 3 by dirt pocket 2.Seal bar 9 is arranged between two round brush spaces, and the edge has gasket seal again, constitutes closed state, and dust is difficult for flying upward out.

This dust-free black board eraser internals all is to adopt light material, though volume and weight than traditional increase slightly a bit, do not influence operation and use, and still keep original use habit, overcome traditional blackboard and wiped chalk dust and fly upward unhealthfully, hindered the shortcoming of sanitation and hygiene.

Claims

1, a kind of dust-free black board eraser is formed by holding box body, supporting member, erasing face, dust removal brush, it is characterized in that:

Erasing face is one group of rotatable cylinder, and rolling drum surface can inside and outside Rotate 180 °, serves as wiping face in the time of outwardly, changes brush with bar-shaped dedusting in the time of inwardly and closely contact, brushes the removing dust by commentaries on classics; Wipe the gear that action is rotated with smearing for one group, drive the dedusting brush and rotate, and have the dust retaining to raise rod, gasket seal, only needle roller and dust collection chamber;

A, bar-shaped cylinder brushing 6 are fixed together with brushing pilot pin 15, locating part 16 makes the cylinder can only left and right Rotate 180 °, and dedusting rotary brush 7 links with driving gear set 11, and by gear travel(l)ing rest 13, spring 14 links with rubber wheel 12, is covered by gear cover 17; Be installed in the support 4 on the housing 1, idler pulley brushing and rotary brush;

By being loaded on housing, the housing inner edge serves as a contrast gasket seal 10, and dirt pocket 2 is arranged by securing member 8 for b, seal bar 9, and ash accumulating chamber 3 accumulates dust and discharges by ash-draining gate 5.

2, dust-free black board eraser according to claim 1 is characterized in that described rubber takes turns 12 contact-making surfaces slightly above cylinder brushing 6 contact surfaces.