CN104139654B - Handwriting eraser - Google Patents
Handwriting eraser Download PDFInfo
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- CN104139654B CN104139654B CN201410339788.9A CN201410339788A CN104139654B CN 104139654 B CN104139654 B CN 104139654B CN 201410339788 A CN201410339788 A CN 201410339788A CN 104139654 B CN104139654 B CN 104139654B
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- resistance
- controlled switch
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- comparator
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Abstract
The present invention relates to a kind of handwriting eraser, including electro-heat equipment, described electro-heat equipment includes the heating, electric-controlled switch and the power circuit that are sequentially connected electrically, and described electric-controlled switch controls the on or off that described power circuit is powered. The present invention utilizes electrothermal wire heating, during use, temperature controls in constant level, add thermally safe control circuit, once temperature is too high, electric-controlled switch can disconnect automatically, is prevented effectively from user and is burned, and add USB charging inlet, can repeatedly charge use, simple to operate, safety, paper will not be wrinkled.
Description
Technical field
The present invention relates to a kind of hundred happy pen appurtenances, particularly relate to a kind of handwriting eraser.
Background technology
Hundred happy pens are to adopt special macromolecular material as ink base, are assembled through special process. Hundred happy pens are in the process write, if mistake occurs, need to eliminate person's handwriting, existing general frictional heat, makes person's handwriting ink reach uniform temperature and makes it volatilize, thus reaching to eliminate the purpose of person's handwriting, but the volatilization point of this special macromolecular material is high, friction repeatedly does not only reach the temperature of needs sometimes, but also can wrinkle paper, causes unnecessary trouble.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, it is provided that a kind of simple in construction, safety, maintenance paper formation handwriting eraser.
For reaching above-mentioned purpose, the technical solution used in the present invention is: a kind of handwriting eraser, including electro-heat equipment, described electro-heat equipment includes the heating, electric-controlled switch and the power circuit that are sequentially connected electrically, and described electric-controlled switch controls the on or off that described power circuit is powered.
In a preferred embodiment of the present invention, handwriting eraser farther includes described power circuit and includes the charging circuit that power-switching circuit is connected with described power-switching circuit.
In a preferred embodiment of the present invention, handwriting eraser farther includes to be additionally provided with the thermally safe control circuit being connected with described electric-controlled switch.
In a preferred embodiment of the present invention, handwriting eraser farther includes described thermally safe control circuit and includes comparator A, Zener diode DW1, Zener diode DW2, critesistor Rfz, resistance R1, resistance R2, resistance R3, the power output end VCC of described power-switching circuit is respectively through described resistance R1, the in-phase input end of resistance R2 and described comparator A, inverting input is connected, described critesistor Rfz is connected between in-phase input end and the resistance R1 of described comparator A, described resistance R1 is connected with the negative pole of the junction of critesistor Rfz with described Zener diode DW1, the junction of the in-phase input end of described critesistor Rfz and comparator A is connected to the ground by described resistance R3 and connects, the inverting input of described comparator A is also connected with the negative pole of described Zener diode DW2, described Zener diode DW1, the positive pole of Zener diode DW2 is all connected to the ground and connects, the outfan of described comparator A is connected with described electric-controlled switch.
In a preferred embodiment of the present invention, handwriting eraser farther includes rechargeable battery, battery protecting circuit and the USB charging inlet that described charging circuit includes being sequentially connected with.
In a preferred embodiment of the present invention, handwriting eraser farther includes to be in series with hand switch between described heating and described electric-controlled switch.
In a preferred embodiment of the present invention, it is heating wire that handwriting eraser farther includes described heating.
The invention solves the defect existed in background technology, the present invention utilizes electrothermal wire heating, during use, temperature controls in constant level, adds thermally safe control circuit, once temperature is too high, electric-controlled switch can disconnect automatically, it is prevented effectively from user to be burned, and adds USB charging inlet, it is possible to use of repeatedly charging, simple to operate, safety, will not wrinkle paper.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the circuit diagram of the preferred embodiments of the present invention;
In figure: 4, electric-controlled switch, 6, power circuit, 8, heating wire, 10, power-switching circuit, 14, charging circuit, 16, rechargeable battery, 18, battery protecting circuit, 20, USB charging inlet, 22, thermally safe control circuit.
Detailed description of the invention
Presently in connection with drawings and Examples, the present invention is further detailed explanation, and these accompanying drawings are the schematic diagram of simplification, and the basic structure of the present invention is only described in a schematic way, and therefore it only shows the composition relevant with the present invention.
As it is shown in figure 1, a kind of handwriting eraser, including electro-heat equipment, electro-heat equipment includes the heating, electric-controlled switch 4 and the power circuit 6 that are sequentially connected electrically, and electric-controlled switch 4 controls the on or off of power circuit 6 power supply. Heating is preferably heating wire 8, and cost is low and easy to use, but is not limited to heating wire, it is also possible to for electrical bar, electric hot tray, electric hot plate etc. Optimization power supply circuit 6 of the present invention includes the charging circuit 14 that power-switching circuit 10 is connected with power-switching circuit 10, power-switching circuit 10 can be selected for the LM2744 power management chip that Texas Instruments produces, the power output end VCC of power-switching circuit 10 is connected with electric-controlled switch 4, power output end VCC is 1V DC source, and it is a fixed value that power-switching circuit 10 makes by the electric current on heating wire 8. Charging circuit 14 includes the rechargeable battery 16, battery protecting circuit 18 and the USB charging inlet 20 that are sequentially connected with; rechargeable battery 16 can be lithium battery; battery protecting circuit 18 can select DW01+ lithium battery protection circuit; realize, by USB charging inlet 20, use of repeatedly charging, can facilitate simultaneously and obtain charge power supply from computer or charger for mobile phone nearby.
In order to avoid temperature is too high and scald user, guarantee the safety of user, it is additionally provided with the thermally safe control circuit 22 being connected with electric-controlled switch 4, thermally safe control circuit 22 includes comparator A, Zener diode DW1, Zener diode DW2, critesistor Rfz, resistance R1, resistance R2, resistance R3, critesistor Rfz is semistor, the power output end VCC of power-switching circuit 10 is respectively through resistance R1, the in-phase input end of resistance R2 and comparator A, inverting input is connected, critesistor Rfz is connected between the in-phase input end of comparator A and resistance R1, the junction of resistance R1 and critesistor Rfz is connected with the negative pole of Zener diode DW1, the junction of the in-phase input end of critesistor Rfz and comparator A is connected to the ground by resistance R3 and connects, the inverting input of comparator A is also connected with the negative pole of Zener diode DW2, Zener diode DW1, the positive pole of Zener diode DW2 is all connected to the ground and connects, the outfan of comparator A is connected with electric-controlled switch 4.
It is in series with hand switch K, it is necessary to when electric-controlled switch 4 and hand switch K the two press button are also turned on, heating wire 8 just can generate heat work, is prevented effectively from situation error starting occur between the preferred heating wire 8 of the present invention and electric-controlled switch 4. The preferred electric-controlled switch 4 of the present invention is snap switch.
The present invention is in use, one housing (not shown) can be set, heating wire 8 is fixed on the front end of housing, connect hand switch K and electric-controlled switch 4, heating wire 8 generates heat, temperature rises to 60 to 70 degrees Celsius, heating wire 8 was smeared gently from person's handwriting, person's handwriting can be made to disappear, when the temperature of heating wire 8 is too high, critesistor Rfz is subject to the sensing resistance of temperature and increases, the in-phase input end voltage being made comparator A by the dividing potential drop effect of critesistor Rfz is reduced, and comparator A is anti-phase, and electric-controlled switch 4 disconnects, circuit quits work, and heating wire 8 is lowered the temperature.
Above according to the desirable embodiment of the present invention for enlightening, by above-mentioned description, related personnel in the scope not necessarily departing from this invention technological thought, can carry out various change and amendment completely. The technical scope of this invention is not limited to the content in description, it is necessary to determine technical scope according to right.
Claims (3)
1. a handwriting eraser, it is characterized in that: include electro-heat equipment, described electro-heat equipment includes the heating being sequentially connected electrically, electric-controlled switch and power circuit, described electric-controlled switch controls the on or off that described power circuit is powered, described power circuit includes power-switching circuit, the charging circuit being connected with described power-switching circuit, described charging circuit includes the rechargeable battery being sequentially connected with, battery protecting circuit and USB charging inlet, it is additionally provided with the thermally safe control circuit being connected with described electric-controlled switch, described thermally safe control circuit includes comparator A, Zener diode DW1, Zener diode DW2, critesistor Rfz, resistance R1, resistance R2, resistance R3, the power output end VCC of described power-switching circuit is connected by the in-phase input end of described resistance R1 with described comparator A, the power output end VCC of described power-switching circuit is connected by the inverting input of described resistance R2 with described comparator A, described critesistor Rfz is connected between in-phase input end and the resistance R1 of described comparator A, described resistance R1 is connected with the negative pole of the junction of critesistor Rfz with described Zener diode DW1, the junction of the in-phase input end of described critesistor Rfz and comparator A is connected to the ground by described resistance R3 and connects, the inverting input of described comparator A is also connected with the negative pole of described Zener diode DW2, described Zener diode DW1, the positive pole of Zener diode DW2 is all connected to the ground and connects, the outfan of described comparator A is connected with described electric-controlled switch.
2. handwriting eraser according to claim 1, it is characterised in that: it is in series with hand switch between described heating and described electric-controlled switch.
3. handwriting eraser according to claim 1 and 2, it is characterised in that: described heating is heating wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410339788.9A CN104139654B (en) | 2014-07-17 | 2014-07-17 | Handwriting eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410339788.9A CN104139654B (en) | 2014-07-17 | 2014-07-17 | Handwriting eraser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104139654A CN104139654A (en) | 2014-11-12 |
| CN104139654B true CN104139654B (en) | 2016-06-15 |
Family
ID=51849060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410339788.9A Expired - Fee Related CN104139654B (en) | 2014-07-17 | 2014-07-17 | Handwriting eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104139654B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584940A (en) * | 2016-07-07 | 2018-01-16 | 李光辉 | It is a kind of can quick wipe ink automatic heating colour killing wipe |
| CN111452537B (en) * | 2019-01-22 | 2022-09-20 | 上海巨哥电子科技有限公司 | Display method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201039466Y (en) * | 2007-04-13 | 2008-03-19 | 美的集团有限公司 | Heating and heat-preserving circuit with PTC element |
| CN201079482Y (en) * | 2008-01-16 | 2008-07-02 | 梁池雄 | Hand warmer |
| CN202669314U (en) * | 2012-05-29 | 2013-01-16 | 张秀英 | Electrothermal eraser |
| CN203381396U (en) * | 2013-07-01 | 2014-01-08 | 黄智贤 | Electronic type handwriting processing device |
| CN204055086U (en) * | 2014-07-17 | 2014-12-31 | 苏州芸芮懿电子科技有限公司 | Handwriting eraser |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9403401B2 (en) * | 2011-05-03 | 2016-08-02 | University Of Vermont And State Agricultural College | Thermal eraser for tactile drawings |
-
2014
- 2014-07-17 CN CN201410339788.9A patent/CN104139654B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201039466Y (en) * | 2007-04-13 | 2008-03-19 | 美的集团有限公司 | Heating and heat-preserving circuit with PTC element |
| CN201079482Y (en) * | 2008-01-16 | 2008-07-02 | 梁池雄 | Hand warmer |
| CN202669314U (en) * | 2012-05-29 | 2013-01-16 | 张秀英 | Electrothermal eraser |
| CN203381396U (en) * | 2013-07-01 | 2014-01-08 | 黄智贤 | Electronic type handwriting processing device |
| CN204055086U (en) * | 2014-07-17 | 2014-12-31 | 苏州芸芮懿电子科技有限公司 | Handwriting eraser |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104139654A (en) | 2014-11-12 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20180717 |
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| CF01 | Termination of patent right due to non-payment of annual fee |