CN2381509Y

CN2381509Y - Automatic electrostatic dust collector for blackboard

Info

Publication number: CN2381509Y
Application number: CN 99232283
Authority: CN
Inventors: 魏江必
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-06
Filing date: 1999-08-06
Publication date: 2000-06-07
Anticipated expiration: 2009-08-06

Abstract

The utility model relates to an automatic electrostatic dust removing brush for a blackboard. A screw rod which is arranged on the upper and the lower parts of a blackboard is driven by a driving system. A blackboard brush with an electrostatic dust removing device is fixed by a flexible device on a half nut which is arranged on the screw rod and is matched with the screw rod. When the utility model is used, powder dust of the blackboard can not fly away, and the manual work of a teacher is lightened. The utility model has thorough dust removing effect, convenient use and no influence on teachers' or students' body health.

Description

Blackboard automatic electrostatic dust collection brush

The utility model relates generally to a kind of teaching aid, particularly a kind of electrostatic precipitator of blackboard.

In order to safeguard the healthy of Faculty and Students, dust pollution when reducing teacher's writing blackboard, there are many known technologies to be used to solve the problem of this respect, for example dust-free chalk, electric blackboard eraser etc., but all fundamentally do not solve the problem that exists in general, it is essential therefore providing better device in this respect.

The purpose of this utility model then is to provide a kind of can alleviate teacher's manual labor, and dedusting is thorough, blackboard automatic electrostatic dust collection brush easy to use.

For achieving the above object, scheme of the present utility model is: drive the screw mandrel that is arranged on the blackboard upper-lower position with a transmission system, with the blackboard brush of fixing a static electrification dust arrester on the screw mandrel fit screw rod half-nut by flexible apparatus.

Adopt such scheme, dust is collected in the container by electrostatic equipment, can not fly upward everywhere, and also simple to operate, thus realized the purpose of this utility model.

Below in conjunction with diagram and embodiment scheme is described in more detail.

Fig. 1 is the transmission schematic diagram of blackboard automatic electrostatic dust collection brush;

Fig. 2 is the brush box front view of blackboard automatic electrostatic dust collection brush;

Fig. 3 is the brush box side view of blackboard automatic electrostatic dust collection brush;

As shown in Figure 1, by the gear of motor (1) motion is passed on two pairs of bevel gears by a speed change system, driving screw mandrel (2) and (3) respectively rotates, screw mandrel (2) is arranged on the upper end of blackboard, screw mandrel (3) is arranged on the lower end of blackboard, what match with two screw mandrels is half-nut (4) and (5), as shown in Figures 2 and 3, there is a projection to cooperate with chute (6) and (7) respectively on half-nut (4) and (5), to half-nut carry out along screw axis to the location, be fixed with a short tube (10) and (11) respectively with bolt (8) and (9) on the side of half-nut, flatten so that pass bolt (8) and (9) bottom of short tube.Also be with a coil spring (12) and (13) on bolt (8) and (9), adopt said structure can regulate the pressure of blackboard brush to blackboard, short tube (10) and (11) cooperate with two short columns (15) and (16) of blackboard electrostatic precipitation brush (14), also be placed with a spring (17) and (18) in the short tube and prop up short column, half-nut connects by an above-mentioned cover flexible structure, accomplish adjustable in pressure, dress folding blackboard dust removal brush is convenient.

Blackboard electrostatic precipitation brush (14) has an insulation box body, usually use plastics, or other nonmetallic materials make, box body is woven wire (19) by the one side of blackboard, be fixed with bristle (20) on the silk screen (19), the top of box body is placed with high voltage electrostatic device (21), spiral coil (22) one ends of diagram expression input stage join with the conduction brush (23) that is fixed on half-nut, conduction brush (23) contacts with the contact rod (24) that is arranged on the blackboard top, the other end joins by the screw mandrel of short column and blackboard top, be 30 volts of interchanges owing to be input to the voltage of electrostatic equipment by isolating transformer output, adopt this mode can save a contact rod, and fool proof.The spiral coil (25) of expression output stage is through promoting circuit the alternating voltage of input to be brought up to nearly ten thousand volts greatly, but electric current is very little, one terminates on the woven wire (19), the other end is arranged on the bigger conductive plate (26) of box inner area, to form an electrostatic field, a chalk dust outlet is arranged in the lower end of box body, and seal with valve.

On transmission system, also be provided with limit switch (27) and (28), for automatically controlled use.The circuit of controlling this transmission system is easy to design, and this programme is no longer listed.

Adopt said apparatus, it is extremely convenient to use.When cleaning blackboard with water as needs, start transmission system, then the electrostatic precipitation brush moves around automatically, bristle with the dust brush down the back by electrostatic field with dust deposit in box, regularly pour out.The blackboard dust no longer disorderly flies like this, just can not influence the healthy of Faculty and Students.

In sum, the utility model is effective.

Claims

1, a kind of blackboard automatic electrostatic dust collection brush is characterized in that: drive the screw mandrel that is arranged on the blackboard upper-lower position with a transmission system, with the blackboard brush of fixing a static electrification dust arrester on the screw mandrel fit screw rod half-nut by flexible apparatus.

2, blackboard automatic electrostatic dust collection brush according to claim 1, it is characterized in that: described transmission system comprises that motor (1) passes to motion on two pairs of bevel gears by the gear of a speed change system, drives screw mandrel (2) and (3) respectively and rotates.

3, blackboard automatic electrostatic dust collection brush according to claim 2, it is characterized in that: what match with two screw mandrels is half-nut (4) and (5), has a projection to cooperate with chute (6) and (7) respectively on half-nut (4) and (5).

4, blackboard automatic electrostatic dust collection brush according to claim 3, it is characterized in that: be fixed with a short tube (10) and (11) respectively with bolt (8) and (9) on the side of half-nut, flatten so that pass bolt (8) and (9) bottom of short tube, also is with a coil spring (12) and (13) on bolt (8) and (9).

5, blackboard automatic electrostatic dust collection brush according to claim 4, it is characterized in that: described short tube (10) and (11) cooperate with two short columns (15) and (16) of blackboard electrostatic precipitation brush (14), also are placed with a spring (17) and (18) in the short tube and prop up short column.

6, blackboard automatic electrostatic dust collection brush according to claim 1 is characterized in that: blackboard electrostatic precipitation brush (14) has an insulation box body, and box body is woven wire (19) by the one side of blackboard, is fixed with bristle (20) on the silk screen (19).

7, blackboard automatic electrostatic dust collection brush according to claim 6, it is characterized in that: the top of box body is placed with high voltage electrostatic device (21), spiral coil (22) one ends of expression input stage join with the conduction brush (23) that is fixed on half-nut, conduction brush (23) contacts with the contact rod (24) that is arranged on the blackboard top, the other end joins by the screw mandrel of short column and blackboard top, the spiral coil (25) of expression output stage is through promoting circuit the alternating voltage of input to be brought up to nearly ten thousand volts greatly, one terminates on the woven wire (19), and the other end is received on the conductive plate (26).