CN202029597U - Dust suction blackboard eraser - Google Patents

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

vacuum blackboard eraser

technical field

The utility model relates to the field of teaching appliances, in particular to a dust-absorbing blackboard eraser. the

Background technique

Existing blackboard erasers are divided into two types: traditional blackboard erasers and blackboard erasers that can absorb dust. The disadvantage of traditional blackboard erasers is that dust will be raised while wiping the blackboard, which will cause health problems if inhaled; and blackboard erasers that can absorb dust The wiper provides power for the battery, and you should always pay attention to the battery power problem when using it, which will bring inconvenience to the use. the

Contents of the invention

The purpose of this utility model is to overcome the defects of existing blackboard erasers that can absorb dust, and provide a blackboard eraser that does not rely on batteries as a power source. the

In order to achieve the above object, the utility model is realized as follows: a dust-absorbing blackboard eraser, comprising a sponge eraser, a box bottom and a box cover, the sponge wiper is arranged on the bottom surface of the box bottom, and the box cover is arranged on the top surface of the box bottom; its characteristic is : It also includes a fan, a motor, a flywheel, a ratchet gear, a rack, a net cover, and a button; the bottom of the box is hollow, the top is open, and the bottom surface is provided with a through hole, the net cover is arranged in the through hole, and the fan is arranged in the box The bottom is located on the top of the grille; the flywheel and the ratchet gear are fixed sequentially and concentrically connected to the shaft of the motor. The flywheel, ratchet gear and motor are all set in the bottom of the box, and the fan and the motor are connected by wires; the rack is set in the bottom of the box And mesh with the ratchet gear, the end of the rack runs through the side of the bottom of the box and is connected with the button, and the two ends of the connecting spring are respectively connected with the top of the rack and the inner wall of the bottom of the box. the

The dust-absorbing blackboard eraser is characterized in that it also includes a blocking block, a through hole is opened on the side of the bottom of the box, the blocking block is arranged in the through hole, and the two are in an interference fit. the

The dust-absorbing blackboard eraser is characterized in that: the motor is a DC motor. the

The utility model adopts the above-mentioned design, and the meshing transmission of the ratchet gear and the rack drives the motor to generate electricity to provide power. In this way, the dependence on the battery is eliminated, the reliability of the utility model is improved, and convenience for use is provided. the

Description of drawings

Fig. 1 is the plan view of the bottom part of the utility model box. the

Fig. 2 is the bottom view of the utility model. the

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

Detailed ways

Below further illustrate the utility model by specific embodiment. the

As shown in Figure 1, Figure 2 and Figure 3, a dust-absorbing blackboard eraser comprises a sponge wiper 1, a box bottom 2 and a box cover 6, the sponge wiper 1 is arranged on the bottom surface of the box bottom 2, and the box cover 6 is arranged on the box bottom 2 Top surface; it is characterized in that it also includes a fan 7, a motor 9, a flywheel 8, a ratchet gear 10, a rack 11, a net cover 3, a connecting spring 12 and a button 5; the bottom of the box 2 is hollow, the top is open, and the bottom has a Through hole, net cover 3 is located in described through hole, and fan 7 is located at box bottom 2 and is positioned at net cover 3 tops; The ratchet gear 10 and the motor 9 are all arranged in the bottom of the box 2, and the fan 7 is connected with the motor 9 by wires; It is connected with the button 5, and the two ends of the connecting spring 12 are respectively connected with the top of the rack 11 and the inner sidewall of the box bottom 2. the

The dust-absorbing blackboard eraser is characterized in that it also includes a blocking block 4, a through hole is opened on the side of the box bottom 2, and the blocking block 4 is arranged in the through hole, and the two are interference fit. the

The dust-absorbing blackboard eraser is characterized in that: the motor 9 is a DC motor. the

The utility model adopts the above-mentioned design, and the meshing transmission of the ratchet gear 10 and the rack 11 drives the motor 9 to generate electricity to provide electric power to drive the fan 7 to rotate and pump air into the bottom of the box to absorb dust. The utility model has high reliability and provides convenience for use. the

Claims (3)

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.

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