CN203157482U - Automatic lighting pen - Google Patents
Automatic lighting pen Download PDFInfo
- Publication number
- CN203157482U CN203157482U CN 201320166936 CN201320166936U CN203157482U CN 203157482 U CN203157482 U CN 203157482U CN 201320166936 CN201320166936 CN 201320166936 CN 201320166936 U CN201320166936 U CN 201320166936U CN 203157482 U CN203157482 U CN 203157482U
- Authority
- CN
- China
- Prior art keywords
- pen
- handwriting
- emitting diode
- automatic lighting
- pen body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses an automatic lighting pen which comprises a pen body, wherein the outer part of the pen body is stuck with high-polymer piezoelectric material polyvinyl fluoride; the lower end of the pen body is connected with an LED; the lower end of the LED is connected with a pen head; and a charge amplifier is mounted inside a lower part of the pen body. The automatic lighting pen solves the problem of difficulty in writing under the situations of no light or weaker light rays, and can improve the lighting conditions without an external power, so as to be more convenient to use, and meanwhile, effective utilization of resources is further improved, and cost is saved.
Description
Technical field
The utility model relates to a kind of pen, and what be specifically related to is a kind of automatic lamp pen of utilizing the high polymer piezoelectric material power supply.
Background technology
Commonly used pen only just can write preferably the time at light in the actual life, does not have under the more weak situation of light or light at night, can't well fulfil assignment.Thus, give some particular surroundings, as field work etc., bring some inconvenience.If but improve illumination by external power supply, and then not high to the resources effective utilization yet, easily cause the wasting of resources.
Summary of the invention
The purpose of this utility model is to overcome the above problem that prior art exists, and a kind of automatic lamp pen is provided, and uses more conveniently, more can improve the resources effective utilization.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the utility model is achieved through the following technical solutions:
A kind of automatic lamp pen, comprise handwriting, the paste outside high polymer piezoelectric material polyvinyl fluoride (PVF) of described handwriting, the lower end of described handwriting connects light emitting diode, described light emitting diode lower end connects nib, described handwriting is equipped with charge amplifier in the lower part, hold described handwriting during use, can apply power to described handwriting inner macromolecule piezoelectric, because piezo-electric effect, high polymer piezoelectric material converts pressure to electric charge, and the charge conversion of high polymer piezoelectric material being exported by described charge amplifier is voltage again, light described light emitting diode, thereby make described nib that better lighting environment be arranged when writing.
The beneficial effects of the utility model are:
The utility model has solved the problem of difficult of writing under the more weak situation of no light or light, and dispense with outer connecting power can improve lighting condition, thereby uses more conveniently, has also improved the resources effective utilization simultaneously, has saved cost.
Description of drawings
Fig. 1 is the overall structure schematic diagram;
Fig. 2 is the light emitting diode construction schematic diagram;
Fig. 3 is schematic diagram;
Fig. 4 is circuit diagram.
Number in the figure explanation: 1, handwriting, 2, charge amplifier, 3, light emitting diode, 4, nib.
The specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
With reference to Fig. 1, shown in Figure 2, a kind of automatic lamp pen, comprise handwriting 1, the paste outside high polymer piezoelectric material polyvinyl fluoride (PVF) of described handwriting 1, the lower end of described handwriting 1 connects light emitting diode 3, described light emitting diode 3 lower ends connect nib 4, described handwriting is equipped with charge amplifier 2 in 1 lower part, hold described handwriting 1 during use, can apply power to described handwriting 1 inner macromolecule piezoelectric, because piezo-electric effect, high polymer piezoelectric material converts pressure to electric charge, be voltage by described charge amplifier 2 with the charge conversion of high polymer piezoelectric material output again, light described light emitting diode 3, thereby better lighting environment is arranged when making described written 4 to write.
The operation principle of present embodiment is as follows:
With reference to Fig. 3, shown in Figure 4, feedback capacity C
fBe connected across between the inverting input and output of described charge amplifier 2.According to the Miller equivalent theorem, be equivalent in the input parallel connection equivalent capacity C that capacity is very big
f'.If the open-loop gain number of operational amplifier is A
u, be about 120dB usually, be equivalent to 10
6C
f(the 1+A of ' '=
u) C
f, C
fSpan mostly be 100pF ~ 0.1 μ F.If C
fGet minimum of a value 100pF, then equivalent capacity C
f' be about 100 μ F.The total capacitance of input circuit is basically by C
f＇ determines
C
Always=Ca+Cc+C
i+ (1+A
u) C
f
The output voltage of described charge amplifier 2 is:
In the formula
Q: the electric charge virtual value that piezoelectric element is produced by the dynamic force effect;
C
f: be connected in parallel on the feedback capacity between described charge amplifier 2 inputs and the output;
When A is enough big, (1+A) C then
f(Ca+Cc+C
i), but the following formula abbreviation is
Hence one can see that, and the output voltage of described charge amplifier 2 is only relevant with feedback capacity with the input electric charge.
When the people held described handwriting 1, the power of holding was more big, and high polymer piezoelectric material polyvinyl fluoride (PVF) output charge is more many, and described charge amplifier 2 output voltages are more high, and in described light emitting diode 3 voltage allowed bands, described Light-Emitting Diode 3 is more bright.
Claims (1)
1. automatic lamp pen, it is characterized in that: comprise handwriting (1), the paste outside high polymer piezoelectric material polyvinyl fluoride of described handwriting (1), the lower end of described handwriting (1) connects light emitting diode (3), described light emitting diode (3) lower end connects nib (4), and described handwriting (1) is equipped with charge amplifier (2) in the lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320166936 CN203157482U (en) | 2013-04-07 | 2013-04-07 | Automatic lighting pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320166936 CN203157482U (en) | 2013-04-07 | 2013-04-07 | Automatic lighting pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203157482U true CN203157482U (en) | 2013-08-28 |
Family
ID=49018698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320166936 Expired - Fee Related CN203157482U (en) | 2013-04-07 | 2013-04-07 | Automatic lighting pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203157482U (en) |
-
2013
- 2013-04-07 CN CN 201320166936 patent/CN203157482U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20140407 |