CN202029597U

CN202029597U - Dust suction blackboard eraser

Info

Publication number: CN202029597U
Application number: CN2011200864918U
Authority: CN
Inventors: 归欣怡
Original assignee: Yangxing Middle School Affiliated to East China Normal University
Current assignee: Yangxing Middle School Affiliated to East China Normal University
Priority date: 2011-03-29
Filing date: 2011-03-29
Publication date: 2011-11-09
Anticipated expiration: 2021-03-29

Abstract

The utility model relates to the field of teaching aids, in particular to a dust suction blackboard eraser. The dust suction blackboard eraser comprises a sponge eraser, a box bottom and a box cover. The sponge eraser is arranged on the bottom surface of the box bottom. The box cover is arranged on the top surface of the box bottom. The dust suction blackboard eraser is characterized by also comprising a fan, a motor, a flywheel, a ratchet gear wheel, a rack, a mesh enclosure and a button, wherein the box bottom is of a hollow shape; the top part of the box bottom is open; the bottom surface of the bot bottom is provided with a through hole; the mesh enclosure is arranged in the through hole; the fan is arranged in the box bottom and is positioned at the top of the mesh enclosure; the flywheel and the ratchet gear wheel are fixed sequentially and are concentrically connected on to a rotating shaft of the motor; the flywheel, the ratchet gear wheel and the motor are all arranged int the box bottom; the fan is connected with the motor through a lead wire; the rack is arranged in the box bottom and is meshed with the ratchet gear wheel; the tail end of the rack runs through the lateral surface of the box bottom and is connected with the button; and both ends of a connecting spring are respectively connected with the top end of the rack and the inner side wall of the box bottom. After the dust suction blackboard eraser is adopted, dust generated in the process of cleaning a blackboard can be sucked into the dust suction blackboard eraser, so that the dust is avoided flying to be breathed in by people.

Description

Dust absorption blackboard eraser

Technical field

The utility model relates to the teaching aid field, is specially a kind of dust absorption blackboard eraser.

Background technology

Existing blackboard eraser is divided into two kinds of the blackboard erasers that the traditional blackboard scrape along can be inhaled dust, and the dust of can kicking up when the shortcoming that traditional blackboard is wiped is blackboard wiping is sucked by the people and then can cause health problem; The blackboard eraser that can inhale dust will often be careful the battery electric quantity problem in use then for battery provides electric power, makes troubles to use.

Summary of the invention

The purpose of this utility model is to overcome the existing defective that can inhale the blackboard eraser of dust, and a kind of blackboard eraser that does not rely on battery as power supply is provided.

In order to achieve the above object, the utility model is achieved in that a kind of dust absorption blackboard eraser, comprises at the bottom of sponge brush, the box and lid, and sponge brush is located at bottom surface at the bottom of the box, and lid is located at end face at the bottom of the box; It is characterized in that: also comprise fan, motor, flywheel, ratchet-gear wheel, tooth bar, guard and button; Be hollow form at the bottom of the box, open top, the bottom surface has through hole, and guard is located in the described through hole, in fan is located at the bottom of the box and be positioned at the guard top; Flywheel, ratchet-gear wheel are fixed successively and are connected in one heart in the rotating shaft of motor, and in flywheel, ratchet-gear wheel, motor all were located at the bottom of the box, fan was connected by lead with motor; In tooth bar is located at the bottom of the box and with the ratchet-gear wheel engagement, the end of tooth bar runs through the box bottom side and is connected with button, the two ends of connection spring are connected with the top of tooth bar, the madial wall at the bottom of the box respectively.

Described dust absorption blackboard eraser it is characterized in that: further comprising sprue, and the side at the bottom of the box has through hole, and sprue is located in the described through hole, both interference fit.

Described dust absorption blackboard eraser is characterized in that: described motor is a direct current generator.

The utility model adopts above-mentioned design, drives electric power generation so that electric power to be provided with the engaged transmission of ratchet-gear wheel and tooth bar, so, has broken away from the dependence to battery, has improved reliability of the present utility model, and provides convenience for use.

Description of drawings

Fig. 1 is the vertical view that the utility model box bottom is divided.

Fig. 2 is a upward view of the present utility model.

Fig. 3 is a right view of the present utility model.

The specific embodiment

Below further specify the utility model by specific embodiment.

As Fig. 1, Fig. 2 and shown in Figure 3, a kind of dust absorption blackboard eraser comprises at the bottom of sponge brush 1, the box 2 and lid 6, and sponge brush 1 is located at 2 bottom surfaces at the bottom of the box, and lid 6 is located at 2 end faces at the bottom of the box; It is characterized in that: also comprise fan 7, motor 9, flywheel 8, ratchet-gear wheel 10, tooth bar 11, guard 3, connect spring 12 and button 5; 2 are hollow form at the bottom of the box, open top, and the bottom surface has through hole, and guard 3 is located in the described through hole, and fan 7 is located at the bottom of the box in 2 and is positioned at guard 3 tops; Flywheel 8, ratchet-gear wheel 10 are fixing successively and be connected in one heart in the rotating shaft of motor 9, and flywheel 8, ratchet-gear wheel 10, motor 9 all are located at the bottom of the box in 2, and fan 7 and motor 9 are connected by lead; Tooth bar 11 be located at the bottom of the box in 2 and with ratchet-gear wheel 10 engagements, the end of tooth bar 11 runs through at the bottom of the box 2 sides and is connected with button 5, the two ends of connection spring 12 are connected with 2 madial wall at the bottom of the top of tooth bar 11, the box respectively.

Described dust absorption blackboard eraser it is characterized in that: further comprising sprue 4, and 2 side has through hole at the bottom of the box, and sprue 4 is located in the described through hole, both interference fit.

Described dust absorption blackboard eraser is characterized in that: described motor 9 is direct current generator.

The utility model adopts above-mentioned design, engaged transmission drive motor 9 generatings with ratchet-gear wheel 10 and tooth bar 11 are bled at the bottom of the box to absorb dust so that 7 rotations of driven by power fan to be provided, and so, have broken away from the dependence to battery, improve reliability of the present utility model, and provide convenience for use.

Claims

1. a dust absorption blackboard eraser comprises at the bottom of sponge brush, the box and lid, and sponge brush is located at bottom surface at the bottom of the box, and lid is located at end face at the bottom of the box; It is characterized in that: also comprise fan, motor, flywheel, ratchet-gear wheel, tooth bar, guard and button; Be hollow form at the bottom of the box, open top, the bottom surface has through hole, and guard is located in the described through hole, in fan is located at the bottom of the box and be positioned at the guard top; Flywheel, ratchet-gear wheel are fixed successively and are connected in one heart in the rotating shaft of motor, and in flywheel, ratchet-gear wheel, motor all were located at the bottom of the box, fan was connected by lead with motor; In tooth bar is located at the bottom of the box and with the ratchet-gear wheel engagement, the end of tooth bar runs through the box bottom side and is connected with button, the two ends of connection spring are connected with the top of tooth bar, the madial wall at the bottom of the box respectively.

2. dust absorption blackboard eraser according to claim 1 it is characterized in that: further comprising sprue, and the side at the bottom of the box has through hole, and sprue is located in the described through hole, both interference fit.

3. dust absorption blackboard eraser according to claim 1 is characterized in that: described motor is a direct current generator.