CN202764550U

CN202764550U - Dustproof blackboard eraser

Info

Publication number: CN202764550U
Application number: CN 201220433736
Authority: CN
Inventors: 孙名文
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-08-29
Filing date: 2012-08-29
Publication date: 2013-03-06
Anticipated expiration: 2022-08-29

Abstract

The utility model relates to a blackboard eraser, in particular to a dustproof blackboard eraser. The dustproof blackboard eraser comprises a fixing board, a shell body and felt fixed on the fixing board. The fixing board is fixed in the shell body, a sealing hollow cavity is arranged between the fixing board and the inner side of the shell body, a plurality of spray tubes are arranged between the sealing hollow cavity and the felt and the shell body is respectively provided with a water spray extruding device and a water adding opening. The dustproof blackboard eraser has the advantages of being simple in structure, efficient in preventing chalk dust from flying upwards when a blackboard is erased and protective in a classroom environment.

Description

The dustproof blackboard sassafras

Technical field

The utility model relates to a kind of blackboard eraser, relates in particular to a kind of dustproof blackboard sassafras.

Background technology

In school, often can use blackboard eraser, common blackboard eraser is made by housing and felt usually, and in blackboard wiping, chalk powder can be expired the classroom and be flown upward with common blackboard eraser, pollutes Classroom air, and that gives the academics and students healthyly brings infringement.The problem that disorderly flies in order to solve chalk powder, people make blackboard eraser a kind of dustproof blackboard sassafras of using the motor drives blade rotation, but structure is very complicated, and parts are more, and dust-proof effect is bad during power shortage.

Summary of the invention

The technical problems to be solved in the utility model provides a kind of dustproof blackboard sassafras that brings better dust-proof effect, thereby better protects classroom environment, and the protection teachers and students are healthy.

The utility model discloses a kind of dustproof blackboard sassafras, comprise fixed head, housing, be fixed on the felt on the fixed head, described fixed head is fixed in the housing, between fixed head and the housing inboard sealed cavity is arranged, be fixed with some sparge pipes between sealed cavity and the felt, one extruding water injector and filler arranged respectively on the described housing, and this utility model is simple in structure, and is economical and practical.

Felt outward flange described in the utility model exposes described housing and is preferably 1-3cm, and felt is contacted with blackboard surface, better with the chalk powder wiped clean on the blackboard.

Sparge pipe one end described in the utility model reaches described cavity bottom, and the other end is included in the felt the inside, can be better by the moistening felt of extruding to the water spray pressurizing unit, and chalk powder flies upward when preventing blackboard wiping, has protected classroom environment.

Water spray pressurizing unit described in the utility model is fixed on the housing, water spray pressurizing unit lower end is fixed with the piston that matches with cavity, water spray pressurizing unit overcoat has spring, elastic force by spring sets back it, continuously extruded water spray pressurizing unit, can by sparge pipe continuously for the felt water spray, make it moistening.

The beneficial effects of the utility model: simple in structure, be easy to realize; Economical and practical, can be good at preventing that chalk powder from disorderly flying, effectively protect classroom environment, the protection teachers and students are healthy.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Among Fig. 1, the 1-housing; The 2-felt; The 3-sparge pipe; The 4-fixed head; The 5-cavity; The 6-filler; The 7-spring; The 8-pressurizing unit of spraying water; The 9-piston.

The specific embodiment

Realize that detailed content of the present utility model is:

By shown in Figure 1, the utility model comprises fixed head 4, housing 1, is fixed on the felt 2 on the fixed head 4, described fixed head 4 is fixed in the housing 1, between fixed head 4 and housing 1 inboard sealed cavity 5 is arranged, be fixed with some sparge pipes 3 between sealed cavity 5 and the felt 2, water spray pressurizing unit 8 and a filler 6 arranged respectively on the described housing 1; The outward flange that described felt (2) outward flange exposes described housing 1 is 1-3cm; Described sparge pipe 3 one ends reach described cavity 5 bottoms, and the other end is included in felt 2 the insides, and sufficient water with cavity is expressed to and makes it moistening on the felt; Described water spray pressurizing unit 8 is fixed on the housing 1, and water spray pressurizing unit 8 lower ends are fixed with the piston 9 that matches with cavity 5, and water spray pressurizing unit 8 overcoats have makes its spring that sets back 7.

Claims

1. dustproof blackboard sassafras, comprise fixed head (4), housing (1), be fixed on the felt (2) on the fixed head (4), it is characterized in that: described fixed head (4) is fixed in the housing (1), between fixed head (4) and housing (1) inboard sealed cavity (5) is arranged, be fixed with some sparge pipes (3) between sealed cavity (5) and the felt (2), water spray pressurizing unit (8) and filler (6) are arranged respectively on the described housing (1).

2. according to claims 1 described dustproof blackboard sassafras, it is characterized in that: described felt (2) outward flange exposes described housing (1) 1-3cm.

3. according to claims 1 described dustproof blackboard sassafras, it is characterized in that: described sparge pipe (3) one ends reach described cavity (5) bottom, and the other end is included in felt (2) the inside.

4. according to claims 1 described dustproof blackboard sassafras, it is characterized in that: described water spray pressurizing unit (8) is fixed on the housing (1), water spray pressurizing unit (8) lower end is fixed with the piston (9) that matches with cavity (5), and water spray pressurizing unit (8) overcoat has makes its spring that sets back (7).