CN204184095U - A kind of dust absorption blackboard eraser - Google Patents
A kind of dust absorption blackboard eraser Download PDFInfo
- Publication number
- CN204184095U CN204184095U CN201420673256.4U CN201420673256U CN204184095U CN 204184095 U CN204184095 U CN 204184095U CN 201420673256 U CN201420673256 U CN 201420673256U CN 204184095 U CN204184095 U CN 204184095U
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- blackboard eraser
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- electric capacity
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Abstract
The utility model discloses a kind of dust absorption blackboard eraser, comprise blackboard eraser shell, blackboard eraser, blackboard eraser shell is connected with blackboard eraser is detachable, blackboard eraser is provided with sponge and several air suction openings, blackboard eraser enclosure is provided with electrostatic precipitation circuit, electrostatic precipitation circuit comprises 555 chip U1, transformer T1, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C2, electric capacity C3, triode VT1, high-voltage switch gear S, and the utility model provides the dust absorption blackboard eraser that a kind of structure is simple, cost is low.
Description
Technical field
The utility model relates to a kind of dust absorption blackboard eraser.
Background technology
Chalk is the main tool of current classroom instruction, and existing chalk dust blackboard eraser, when erasing the board, can not be removed efficiently and purify, cause dust from flying, pollutes classroom environment, and harm teachers and students are healthy.
Utility model content
The purpose of this utility model is the deficiency overcome in existing product, provides the dust absorption blackboard eraser that a kind of structure is simple, cost is low.
In order to achieve the above object, the utility model is achieved through the following technical solutions:
A kind of dust absorption blackboard eraser of the present utility model, comprise blackboard eraser shell, blackboard eraser, blackboard eraser shell is connected with blackboard eraser is detachable, blackboard eraser is provided with sponge and several air suction openings, blackboard eraser enclosure is provided with electrostatic precipitation circuit, electrostatic precipitation circuit comprises 555 chip U1, transformer T1, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C2, electric capacity C3, triode VT1, high-voltage switch gear S, 7 pins of 555 chip U1 connect power supply VCC by resistance R1, 6 pins of 555 chip U1 connect 2 pins of 555 chip U1, 2 pins of 555 chip U1 connect 7 pins of 555 chip U1 by resistance R2, resistance R2 connects earth signal GND by electric capacity C2, 1 pin of 555 chip U1 connects earth signal GND, 5 pins of 555 chip U1 connect earth signal GND by electric capacity C3, 4 pins of 555 chip U1 are connected power supply VCC with 8 pins, 3 pins of 555 chip U1 pass through the base stage of resistance R3 connecting triode VT1, the emitter stage of triode VT1 connects earth signal GND, one end of the primary coil of the colelctor electrode connection transformer T1 of pole pipe VT1, the other end of the primary coil of transformer T1 connects power supply VCC, one end of the secondary coil of transformer T1 connects earth signal GND, one end of the other end contact resistance R4 of the secondary coil of transformer T1, the other end of resistance R4 connects earth signal GND by high-voltage switch gear S.
Sponge of the present utility model is fishbone.
Triode VT1 of the present utility model is NPN triode.
Power supply VCC magnitude of voltage of the present utility model is 5V to 15V.
Blackboard eraser shell of the present utility model is provided with the draw-in groove coordinating blackboard eraser to use.
Resistance R1 resistance of the present utility model is 330 ohm, and the resistance of resistance R2 is 33K ohm, and the resistance of resistance R3 is 220 ohm, the resistance of resistance R4 is 1M ohm, the capacitance of electric capacity C1 is 470 microfarads, and the capacitance of electric capacity C2 is 0.01 microfarad, and the capacitance of electric capacity C3 is 0.022 microfarad.
The beneficial effects of the utility model are as follows: the utility model is provided with electrostatic precipitation circuit and produces magnetic field by transformer T1; make blackboard eraser charged; chalk dust is absorbed by air suction opening by electrostatic interaction; dust from flying can not be made; use very environmental protection and health; the utility model realizes dust suction effect by sponge, air suction opening, electrostatic precipitation circuit, and its structure is simple, effective, cost is low, practicality very and convenience.
Accompanying drawing explanation
Fig. 1 is the structural representation of blackboard eraser of the present utility model;
Fig. 2 is the structural representation of blackboard eraser shell of the present utility model;
Fig. 3 is the structural representation of electrostatic precipitation circuit of the present utility model.
Detailed description of the invention
Below in conjunction with Figure of description, the technical solution of the utility model is described further:
As Fig. 1, Fig. 2, shown in Fig. 3, a kind of dust absorption blackboard eraser, comprise blackboard eraser shell 3, blackboard eraser, blackboard eraser shell 3 is connected with blackboard eraser is detachable, blackboard eraser is provided with sponge 1 and several air suction openings 2, sponge 1 is in fishbone, blackboard eraser shell 3 inside is provided with electrostatic precipitation circuit 4, electrostatic precipitation circuit 4 comprises 555 chip U1, transformer T1, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C2, electric capacity C3, triode VT1, high-voltage switch gear S, 7 pins of 555 chip U1 connect power supply VCC by resistance R1, 6 pins of 555 chip U1 connect 2 pins of 555 chip U1, 2 pins of 555 chip U1 connect 7 pins of 555 chip U1 by resistance R2, resistance R2 connects earth signal GND by electric capacity C2, 1 pin of 555 chip U1 connects earth signal GND, 5 pins of 555 chip U1 connect earth signal GND by electric capacity C3, 4 pins of 555 chip U1 are connected power supply VCC with 8 pins, 3 pins of 555 chip U1 pass through the base stage of resistance R3 connecting triode VT1, the emitter stage of triode VT1 connects earth signal GND, one end of the primary coil of the colelctor electrode connection transformer T1 of pole pipe VT1, the other end of the primary coil of transformer T1 connects power supply VCC, one end of the secondary coil of transformer T1 connects earth signal GND, one end of the other end contact resistance R4 of the secondary coil of transformer T1, the other end of resistance R4 connects earth signal GND by high-voltage switch gear S, triode VT1 is NPN triode, power supply VCC magnitude of voltage is 5V to 15V.Blackboard eraser shell (3) is provided with the draw-in groove 5 coordinating blackboard eraser to use.Resistance R1 resistance is 330 ohm, and the resistance of resistance R2 is 33K ohm, and the resistance of resistance R3 is 220 ohm, and the resistance of resistance R4 is 1M ohm, and the capacitance of electric capacity C1 is 470 microfarads, and the capacitance of electric capacity C2 is 0.01 microfarad, and the capacitance of electric capacity C3 is 0.022 microfarad.
The utility model is provided with electrostatic precipitation circuit and produces magnetic field by transformer T1; make blackboard eraser charged; chalk dust is absorbed by air suction opening by electrostatic interaction; dust from flying can not be made; use very environmental protection and health; the utility model realizes dust suction effect by sponge, air suction opening, electrostatic precipitation circuit, and its structure is simple, effective, cost is low, practicality very and convenience.Blackboard eraser shell 3 is connected with blackboard eraser is detachable, after blackboard eraser uses a period of time, is disassembled by blackboard eraser shell 3, just chalk dust can be outwelled, very convenient, practical.
It should be noted that above what enumerate is only a kind of specific embodiment of the present utility model.Obviously, the utility model is not limited to above embodiment, can also have many distortion.
In a word, all distortion that those of ordinary skill in the art can directly derive from content disclosed in the utility model or associate, all should think protection domain of the present utility model.
Claims (6)
1. a dust absorption blackboard eraser, it is characterized in that, comprise blackboard eraser shell (3), blackboard eraser, described blackboard eraser shell (3) is connected with blackboard eraser is detachable, described blackboard eraser is provided with sponge (1) and several air suction openings (2), described blackboard eraser shell (3) inside is provided with electrostatic precipitation circuit (4), described electrostatic precipitation circuit (4) comprises 555 chip U1, transformer T1, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C2, electric capacity C3, triode VT1, high-voltage switch gear S, 7 pins of described 555 chip U1 connect power supply VCC by resistance R1, 6 pins of described 555 chip U1 connect 2 pins of 555 chip U1, 2 pins of described 555 chip U1 connect 7 pins of 555 chip U1 by resistance R2, described resistance R2 connects earth signal GND by electric capacity C2, 1 pin of described 555 chip U1 connects earth signal GND, 5 pins of described 555 chip U1 connect earth signal GND by electric capacity C3, 4 pins of described 555 chip U1 are connected power supply VCC with 8 pins, 3 pins of described 555 chip U1 pass through the base stage of resistance R3 connecting triode VT1, the emitter stage of described triode VT1 connects earth signal GND, one end of the primary coil of the colelctor electrode connection transformer T1 of described pole pipe VT1, the other end of the primary coil of described transformer T1 connects power supply VCC, one end of the secondary coil of described transformer T1 connects earth signal GND, one end of the other end contact resistance R4 of the secondary coil of described transformer T1, the other end of described resistance R4 connects earth signal GND by high-voltage switch gear S.
2. a kind of dust absorption blackboard eraser according to claim 1, it is characterized in that, described sponge (1) is in fishbone.
3. a kind of dust absorption blackboard eraser according to claim 1, it is characterized in that, described triode VT1 is NPN triode.
4. a kind of dust absorption blackboard eraser according to claim 1, it is characterized in that, described power supply VCC magnitude of voltage is 5V to 15V.
5. a kind of dust absorption blackboard eraser according to claim 1, is characterized in that, described blackboard eraser shell (3) is provided with the draw-in groove (5) coordinating blackboard eraser to use.
6. a kind of dust absorption blackboard eraser according to claim 1, it is characterized in that, described resistance R1 resistance is 330 ohm, the resistance of described resistance R2 is 33K ohm, the resistance of described resistance R3 is 220 ohm, and the resistance of described resistance R4 is 1M ohm, and the capacitance of described electric capacity C1 is 470 microfarads, the capacitance of described electric capacity C2 is 0.01 microfarad, and the capacitance of described electric capacity C3 is 0.022 microfarad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420673256.4U CN204184095U (en) | 2014-11-10 | 2014-11-10 | A kind of dust absorption blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420673256.4U CN204184095U (en) | 2014-11-10 | 2014-11-10 | A kind of dust absorption blackboard eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204184095U true CN204184095U (en) | 2015-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420673256.4U Expired - Fee Related CN204184095U (en) | 2014-11-10 | 2014-11-10 | A kind of dust absorption blackboard eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204184095U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105196756A (en) * | 2015-11-02 | 2015-12-30 | 张志通 | Electrostatic precipitation blackboard eraser |
-
2014
- 2014-11-10 CN CN201420673256.4U patent/CN204184095U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105196756A (en) * | 2015-11-02 | 2015-12-30 | 张志通 | Electrostatic precipitation blackboard eraser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150304 Termination date: 20151110 |
|
| EXPY | Termination of patent right or utility model |