CN102221908A - Novel no-battery type electromagnetic pen - Google Patents
Novel no-battery type electromagnetic pen Download PDFInfo
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- CN102221908A CN102221908A CN2010101522104A CN201010152210A CN102221908A CN 102221908 A CN102221908 A CN 102221908A CN 2010101522104 A CN2010101522104 A CN 2010101522104A CN 201010152210 A CN201010152210 A CN 201010152210A CN 102221908 A CN102221908 A CN 102221908A
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Abstract
The invention relates to a novel no-battery type electromagnetic pen, and in particular relates to a novel no-battery type electromagnetic pen containing two groups of coils. In the novel no-battery type electromagnetic pen, the two groups of coils form an oscillating circuit and a resonant circuit respectively, wherein the oscillating circuit is specially used for transmitting electromagnetic signals to a digital board, while the resonant circuit is specially used for receiving the electromagnetic energy transmitted by the digital board so as to provide the energy for the oscillating circuit to transmit the electromagnetic signals. Therefore, in the novel no-battery type electromagnetic pen, the resonant circuit can be used for receiving the electromagnetic energy transmitted by the digital board continuously, and then transmitting the electromagnetic energy to the oscillating circuit, so that the oscillating circuit can transmit the electromagnetic signals continuously. Therefore, different from the traditional no-battery type electromagnetic pen which only can transmit the electromagnetic energy in a short time, the novel no-battery type electromagnetic pen can transmit the electromagnetic energy in a short time, and the transmitted electromagnetic energy also can have stable intensity.
Description
Technical field
The present invention relates to a kind of novel no battery type time writer, particularly relate to a kind of novel no battery type time writer that includes two groups of coils.
Background technology
Induction hand input device mainly is to use with the digiboard special electromagnetic sign pen (abbreviation time writer) of arranging in pairs or groups.General existing known time writer can be divided into according to the method for supplying of its power supply two kinds of battery type time writer and no battery type time writers are arranged.It is with the power supply of a battery as time writer that the battery type time writer is arranged, and the oscillatory circuit in it is by the electric energy that battery provided, and emission electromagnetic signal that can be initiatively, so also be called the active electric magnetic pen.Have the advantage of battery type time writer to be: (1) no matter time writer can launch the electromagnetic signal of characteristic frequency whether near digiboard constantly.(2) no matter whether time writer is near digiboard, and the electromagnetic signal strength of its emission all is consistent.(3) because the electric energy that battery can provide is very abundant, so the intensity of the electromagnetic signal that time writer is launched is stronger.
But have the battery type time writer that its shortcoming is also arranged, need device one battery exactly in handwriting, for example dry cell or alkaline battery etc. cause the weight of time writer heavier, and comparatively clumsy and inconvenient on O﹠M.
No battery type time writer inside does not then have battery as power supply, but utilize the supply of a LC resonant circuit as power supply, the electromagnetic signal resonance that this LC resonant circuit and digiboard are sent, and electromagnetic energy that the reception digiboard transmits and storage, with as the required electric energy of this resonant circuit emission electromagnetic signal, and give digiboard with same LC resonant circuit emission electromagnetic signal.Therefore, resonant circuit in this time writer is simultaneously as receiving the usefulness of electric energy with the emission electromagnetic signal, it only has because of not needing light this advantage of battery weight, but many shortcomings are arranged but, for example: (1) time writer keeps clear of digiboard just can't receive the digiboard electromagnetic energy emitted, and makes time writer can't launch electromagnetic signal.(2) electromagnetic signal strength of time writer emission can't be consistent, as long as time writer is far away more from digiboard, it is just weak more that it can receive electromagnetic energy, because energy shortage causes its electromagnetic signal strength of launching back digiboard also weak more, and because its energy stored of is considerably less, only enough time writer sends electromagnetic signal at short notice, and in the meantime can because of can energy stored fast quick depletion, and electromagnetic signal is promptly weakened, the also therefore electromagnetic signal of emissive porwer unanimity constantly.(3) because this time writer is can energy stored very little, and the electromagnetic signal that causes it to launch is very faint, easily by arround noise disturb.
In recent years, some are arranged on the market, or can reusable rechargeable battery, even be substituted with dry cell in the battery type time writer with a super capacitor (Supper Capacitor) with more long-acting battery, for example lithium battery.Yet, these designs are owing to need have the function of filling energy, often need to increase some extra parts, for example Power Management Unit, charging contact, and the circuit of charging usefulness, or the part that uses some common people to be difficult for obtaining, for example super capacitor, thereby increased the complexity of time writer structure, thereby increased degree of difficulty and the cost of making, but its weight and therefore design and alleviating are significantly lost more than gain on the contrary.
This shows that above-mentioned existing time writer obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of novel no battery type time writer of new structure, make its have simple in structure, cost of manufacture is cheap, in light weight again can be with the advantage of battery type time writer and no battery type time writer, not only do not need to use battery as power supply, the numerous shortcomings that do not have the no battery type time writer of tradition again, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Summary of the invention
The objective of the invention is to, overcome the defective that existing time writer exists, and a kind of new structure is provided can be with the novel no battery type time writer of battery type time writer and no battery type time writer advantage, technical matters to be solved be make that it is not only simple in structure, cost of manufacture is cheap, in light weight, and do not need to use battery as power supply, there is not the electromagnetic signal strength of the no battery type time writer of tradition to decay rapidly at short notice again, and can't continue to launch shortcomings such as electromagnetic signal, be very suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions.Can be according to a kind of of the present invention's proposition with the novel no battery type time writer of battery type time writer with no battery type time writer advantage.This novel no battery type time writer comprises a handwriting, a pen core, one first coil, one second coil and a switch.Wherein, pen core is arranged in the handwriting, is exposed to the handwriting front end but the part of pen core is outstanding, in order to carry out on the digiboard in order to write literal on digiboard, draw or to choose the usefulness of object.First coil and second coil all are arranged at handwriting inside, wherein, first coil is wound on first magnetic conduction substance and is arranged on the pen core, as the usefulness of emission electromagnetic signal to digiboard, second coil then is wound on one second magnetic conduction substance, in order to the electromagnetic signal resonance of being sent with digiboard, and receives the electromagnetic energy that digiboard transmitted, and be sent to first coil, and launch the energy of electromagnetic signal as first coil.Switch then is arranged on the surface of handwriting, in order to control the electromagnetic signal frequency that this first coil is sent.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid novel no battery type time writer is provided with a circuit board in the wherein said handwriting.
Aforesaid novel no battery type time writer, wherein said circuit board is provided with an oscillatory circuit, in order to the emission electromagnetic signal.
Aforesaid novel no battery type time writer, wherein said oscillatory circuit comprises: this first coil; One adjusts circuit and this first coils from parallel connection of coils, finely tunes in order to the electromagnetic signal frequency that this first coil is launched, and makes its frequency energy accurately; And a transistor circuit, in order to form the effect of feedback oscillation with first coil.
Aforesaid novel no battery type time writer, wherein said circuit board are provided with a resonance circuit, in order to the electromagnetic signal resonance of being sent with digiboard, and receive the electromagnetic energy that digiboard transmits, and are converted into electric energy.
Aforesaid novel no battery type time writer, wherein said resonant circuit comprises: this second coil; And electric capacity and this second coils from parallel connection of coils, in order to store the electromagnetic energy that second coil is received.
Aforesaid novel no battery type time writer is provided with a voltage regulation unit between wherein said resonant circuit and this oscillatory circuit, in order to store the converted electric energy of electromagnetic energy that this resonant circuit receives.
Aforesaid novel no battery type time writer, wherein said voltage regulation unit is an electric capacity.
Aforesaid novel no battery type time writer is provided with at least one rectification unit between wherein said resonant circuit and this voltage regulation unit, carries out rectification in order to the electric energy that this resonant circuit is sent to this voltage regulation unit.
Aforesaid novel no battery type time writer, wherein said rectification unit are a schottky diode (Diode Schottky).
Aforesaid novel no battery type time writer, an end of wherein said voltage regulation unit is connected with this resonant circuit, and then is provided with this rectification unit between the other end of this voltage regulation unit and this resonant circuit.
Aforesaid novel no battery type time writer, an end of wherein said voltage regulation unit all is connected with this resonant circuit, and the other end is ground connection then, make this voltage regulation unit connect with this resonant circuit, and the two ends of this resonant circuit respectively is provided with this rectification unit.
Aforesaid novel no battery type time writer, wherein said switch comprises two side push, and the electric capacity that each this side push all has a correspondence is arranged in this oscillatory circuit.
Aforesaid novel no battery type time writer, wherein the electric capacity that each this side push is corresponding with it interconnects, and all with first coils from parallel connection of coils, and whether the electric capacity of controlling this side push correspondence by pushing or opening of this side push participates in the running of this oscillatory circuit.
Aforesaid novel no battery type time writer, wherein said second coil be arranged at this circuit board above or below.
Aforesaid novel no battery type time writer, wherein said second coil is arranged between this circuit board and this first coil.
Aforesaid novel no battery type time writer, wherein said circuit board is arranged between this first coil and this second coil.
Aforesaid novel no battery type time writer, wherein said second coil is entwined by the less lead of an internal resistance, and the number of turns that it twined is more, though and the electromagnetic energy that makes this second coil far still can receive digiboard effectively and sent apart from digiboard.
Aforesaid novel no battery type time writer, the magnetic conduction substance that wherein said second coil is twined is formed by a MnZn material with preferable magnetic conductivity, to strengthen the efficient that this second coil receives the electromagnetic energy that digiboard was sent.
The present invention compared with prior art has tangible advantage and beneficial effect.By technique scheme, the novel no battery type time writer of the present invention has following advantage and beneficial effect at least:
The present invention receives second coil that transmits the electromagnetic signal (or electromagnetic energy) of coming with the store digital plate owing to being exclusively used in one, be specifically designed to the resonant circuit that receives electromagnetic energy and form one, make this novel no battery type time writer need not a battery power supply is provided, also need not utilize resonant circuit while double as is the emission electromagnetic signal, so it is short and electromagnetic energy that receive is few because of the time of receives electromagnetic energy not have existing known no battery type time writer, the electromagnetic signal that is caused can decay rapidly and can't continue to launch problem such as electromagnetic signal.
Therefore, the effect that the present invention contrasts prior art is to provide a kind of with the novel no battery type time writer of battery type time writer with no battery type time writer advantage, it is simple in structure and cost of manufacture is low, and weight is lighter, more can launch electromagnetic signal constantly and its intensity can not decay rapidly at short notice.
In sum, the invention relates to a kind of novel no battery type time writer, particularly relevant for a kind of novel no battery type time writer that includes two groups of coils.Two groups of circles in this novel no battery type time writer are formed an oscillatory circuit and a resonance circuit respectively, wherein, oscillatory circuit is given digiboard in order to the emission electromagnetic signal specially, resonant circuit then is responsible for specially and is received the digiboard electromagnetic energy emitted, to offer the energy of oscillatory circuit as the emission electromagnetic signal.Therefore, novel no battery type time writer of the present invention can receive the digiboard electromagnetic energy emitted constantly by resonant circuit, and sends oscillatory circuit to, makes oscillatory circuit can launch electromagnetic signal constantly.Therefore, novel no battery type time writer of the present invention can only can not launched electromagnetic energy as the no battery type time writer of tradition in of short duration time, and institute's electromagnetic energy emitted also can have stable intensity.The present invention has obvious improvement technically, and has tangible good effect, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Figure 1A to Fig. 1 C is respectively the stereographic map of the novel no battery type time writer of different embodiments of the invention.
Fig. 2 A is the internal circuit synoptic diagram of the novel no battery type time writer of one embodiment of the invention.
Fig. 2 B is the internal circuit synoptic diagram of the novel no battery type time writer of another embodiment of the present invention.
100,100A, 100B: novel no battery type time writer 102: handwriting
104: 106: the first coils of pen core
110: the second coils of 108: the first magnetic conduction substances
116: circuit board 200,200A: internal circuit
202: oscillatory circuit 204: adjust circuit
206: transistor circuit 208: resonant circuit
1141,1142: side push C1, C2, C3, C5, C6, C7, C8, C9: electric capacity
C4: voltage regulation unit D1, D2: rectification unit
Q1: transistor R1, R2, R3, R4: resistance
VC1: variable capacitance
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to novel no its embodiment of battery type time writer, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Some embodiments of the present invention will be described in detail as follows.Yet except following description, the present invention can also be widely implements at other embodiment, and protection scope of the present invention is not subjected to the qualification of embodiment, and its protection domain with claim is as the criterion.Moreover for clearer description being provided and being more readily understood the present invention, graphic interior each several part is not drawn according to its relative size, and some size is compared with other scale dependents and exaggerated; Incoherent detail section does not show fully yet, in the hope of graphic succinct.
Figure 1A is the stereographic map of the novel no battery type time writer of one embodiment of the invention.The novel no battery type time writer 100 of a preferred embodiment of the present invention comprises a handwriting 102, a pen core 104, one first coil 106, one second coil 110 and a switch 114.Wherein, pen core 104 is arranged in the handwriting 102, but the one end is then outstanding and be exposed to handwriting 102 front ends, and as the nib of novel no battery type time writer 100, in order on digiboard, to write literal, draw or to choose the usefulness of object.First coil 106 is wound on one first magnetic conduction substance 108, first magnetic conduction substance 108 then is arranged at (or end of pen core 104) on the pen core 104, or first magnetic conduction substance 108 itself be the part of pen core 104, be that pen core 104 is a magnetic conduction substance, and first coil 106 directly is wound on the pen core 104.Novel no battery type time writer 100 is to give digiboard by first coil, 106 emission electromagnetic signals, and positions and write down the position and the motion track of novel no battery type time writer 100 for digiboard, thereby writes on digiboard or choose.
110 of second coils are wound on one second magnetic conduction substance 112, in order to the electromagnetic signal resonance of being sent with digiboard, and receive the electromagnetic energy that digiboard transmitted, and be sent to first coil 106, and for the energy of first coil 106 as the emission electromagnetic signal.Switch 114 is arranged on the surface of novel no battery type time writer 100, and it comprises two side push 1141 and 1142, in order to control the frequency of the electromagnetic signal of being sent with change first coil 106.
In addition, please consult simultaneously shown in Figure 1A and Fig. 2 A, wherein, Fig. 2 A is the internal circuit synoptic diagram of the novel no battery type time writer of one embodiment of the invention.Be provided with a circuit board 116 in handwriting 102, it is provided with circuit, and the circuit on the circuit board 116 and first coil 106 and second coil 110 form the series circuit (being internal circuit 200) of an oscillatory circuit 202 and a resonance circuit 208.Wherein, oscillatory circuit 202 is in order to the emission electromagnetic signal, and resonant circuit 208 is then in order to receiving the digiboard electromagnetic energy emitted, and converts thereof into electric energy.
In addition, oscillatory circuit 202 more comprises two capacitor C that are connected in parallel to each other 5 and C6, capacitor C 5 is also in parallel with first coil 106 and adjustment circuit 204 simultaneously with C6, wherein capacitor C 6 and C5 respectively with switch 114 in side push 1141 and 1142 interconnect, promptly each side push 1141,1142 has capacitor C 6, the C5 of a correspondence to be arranged in the oscillatory circuit 202.By the pushing or opening of side push 1141,1142, can control the running whether these side push 1141,1142 pairing capacitor C 6, C5 participate in oscillatory circuit 202, by this frequency of the electromagnetic signal sent of control and conversion oscillatory circuit 202.Oscillatory circuit 202 of the present invention can be taked various oscillatory circuit, for example Hartley oscillatory circuit (Hartley Oscillator), Colpitts oscillatory circuit (ColpittsOscillator), Clapp oscillatory circuit (Clapp Oscillator) or Wien bridge oscillatory circuit circuit such as (Wien bridge).
208 capacitor C 3 of resonant circuit by second coil 110 and one and second coils from parallel connection of coils, wherein, the electromagnetic energy that capacitor C 3 is received in order to temporary transient storage second coil 110.In addition, between resonant circuit 208 and this oscillatory circuit 202, be provided with a voltage regulation unit C4, store, with the energy of supply oscillatory circuit 202 emission electromagnetic signals in order to the electric energy that resonant circuit 208 is sent after rectification.The end of voltage regulation unit C4 is connected with resonant circuit 208, and voltage regulation unit C4 also is connected with oscillatory circuit 202.Be provided with a rectification unit D1 between the other end of voltage regulation unit C4 and the resonant circuit 208, carry out half-wave rectification, be sent to voltage regulation unit C4 again and store in order to the electric energy that resonant circuit 208 is sent to voltage regulation unit C4.Voltage regulation unit C4 is an electric capacity, and rectification unit D1 then is a schottky diode (Diode Schottky).208 of resonant circuits are a LC resonant circuit.
In novel no battery type time writer 100, resonant circuit 208 is by second coil 110 and the resonance of digiboard electromagnetic energy emitted, and receive and collection digiboard electromagnetic energy emitted, the collected energy of resonant circuit 208 via the rectification unit D1 rectification that diode constituted after, give voltage regulation unit C4 with supply of electrical energy.When novel no battery type time writer 100 will be launched electromagnetic signal to digiboard, the electric energy that is stored among the voltage regulation unit C4 can be sent in the oscillatory circuit 202, through transistor circuit 206 stablize its voltage and adjust circuit 204 assist accurately to adjust the frequency of the electromagnetic signal of sending after, via first coil 106 this electromagnetic signal is sent again.Simultaneously, make capacitor C 6, C5 participate in the running of oscillatory circuit 202 by the side push in the push switch 114 1141,1142, and change the frequency of the electromagnetic signal that first coil 106 sent, change the function or the mode of operation of time writer 100 by this.
Therefore, novel no battery type time writer 100 receives and collection digiboard electromagnetic energy emitted with the resonant circuit 208 of a special use, and replace tradition the interior battery of battery type time writer is arranged,, and have the lightweight advantage of the no battery type time writer of tradition as the supply of power supply.Simultaneously, because resonant circuit 208 only is used to receive electromagnetic energy, and be not used further to launch electromagnetic signal, so as long as digiboard transmits constantly, it just can receive electromagnetic energy constantly, and convert thereof into electrical power storage in voltage regulation unit C4, give oscillatory circuit 202 emission electromagnetic signals thereby can supply with enough electric energy constantly, and the intensity of electromagnetic signal can not decay at short notice rapidly.Therefore, novel no battery type time writer 100 can be as the no battery type time writer of tradition, because of receiving digiboard electromagnetic energy emitted and emission electromagnetic signal with same LC resonant circuit simultaneously, so only can in of short duration time, receive electromagnetic energy, send with regard to will convert thereof into electromagnetic signal at once, cause its electromagnetic energy that receives to be not enough to continue the emission electromagnetic signal, even the intensity of its electromagnetic signal of launching can promptly decay because of energy shortage in the short time.Therefore, novel no battery type time writer 100 intensity that can't continue to launch electromagnetic signal and electromagnetic signal that can not have a no battery type time writer of tradition problem such as can promptly decay at short notice.
In addition, novel no battery type time writer 100 replaces in the no battery type time writer of tradition simultaneously in order to receiving the LC resonant circuit of electromagnetic energy and emission electromagnetic signal with the oscillatory circuit 202 of a special use, and the emission electromagnetic signal is to digiboard.Therefore, can carry out the action of feedback oscillation and frequency trim by adjustment circuit in the oscillatory circuit 202 204 and transistor circuit 206, make novel no battery type time writer 100 can send stable and accurate electromagnetic signal, and do not have the not enough shortcoming of electromagnetic signal stability of the no battery type time writer of tradition.
Because novel no battery type time writer 100 does not increase extra part, for example Power Management Unit, charging contact, and the circuit of charging usefulness, or some common people part of being difficult for obtaining, super capacitor for example, just can improve the shortcoming of the no battery type time writer of tradition, therefore, do not increase the complexity of its structure, and degree of difficulty and the cost made.
In addition, novel no battery time writer of the present invention can adopt the half-wave rectification technology, more can adopt the full-wave rectification technology.See also simultaneously shown in Figure 1A and Figure 12 B, wherein Fig. 2 B is the internal circuit synoptic diagram of the novel no battery type time writer of another embodiment of the present invention.Internal circuit 200A and 200 has similar circuit structure, have an oscillatory circuit 202, a voltage regulation unit C4 and a resonance circuit 208 equally, and voltage regulation unit C4 is arranged between oscillatory circuit 202 and the resonant circuit 208.The adjustment circuit 204 that both oscillatory circuits 202 comprise first coil 106 equally, composed in parallel by capacitor C 1 and variable capacitance VC1, by transistor (or IC) Q1 and a plurality of capacitor C 7, C8, C9 and a plurality of resistance R 1, R2, R3, R4 polyphone with and transistor circuit 206 that is unified into and capacitor C 6 and the C5 that distinguishes respective side button 1141 and 1142.Resonant circuit 208 between the two is similarly the LC resonant circuit that one second coil 110 and capacitor C 3 are formed in parallel.
Yet the difference between the internal circuit 200A and 200 is that mainly second coil 110 of internal circuit 200A adopts tapped winding mode.In internal circuit 200A, the two ends of resonant circuit 208 connect rectification unit D1 and rectification unit D2 respectively, and after the electric energy that resonant circuit 208 is sent out carried out full-wave rectification earlier, are resent to voltage regulation unit C4.Therefore, use internal circuit 200A, make novel no battery type time writer 100 of the present invention can take the full-wave rectification technology in novel no battery type time writer 100.
In addition, though in the novel no battery type time writer 100 shown in Figure 1A, second coil 110 is the belows that are arranged at circuit board 116, not as limit, but can be arranged in circuit board 116 tops or the idle space of both sides.Perhaps, novel no battery type time writer 100A that can be shown in Figure 1B directly is arranged at the rear of first coil 106 with second coil 110, promptly is arranged between first coil 106 and the circuit board 116.Or, novel no battery type time writer 100B shown in Fig. 1 C, second coil 110 is arranged at the rear of circuit board 116, being about to circuit board 116 is arranged between first coil 106 and second coil 110, but this configuration can make the distance between second coil 110 and the digiboard strengthen (because time writer all is to contact with digiboard with nib in use), the electromagnetic energy induction that can cause 110 pairs of digiboards of second coil to be launched dies down with resonance, and the resonant circuit that influence is made up of second coil 110 receives the efficient of electromagnetic energy, therefore, for remedying the loss of this efficient, the lead that second coil 110 is used for twining need be for having the lead of less internal resistance, multiply enameled wire for example, and the number of turns that it twined also needs to increase, even the number of turns of its winding number of turns of being twined much larger than first coil 106.In addition, be the further loss of this efficient of compensation, need come magnetic conduction material with material, for example the MnZn material with better magnetic conductivity as the winding of second coil.
Therefore, a kind of novel no battery type time writer provided by the invention with battery type time writer and no battery type time writer advantage, it is simple in structure and cost of manufacture is low, and weight is lighter, more can launch electromagnetic signal constantly and its intensity can not decay.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (19)
1. novel no battery type time writer is characterized in that it comprises:
One handwriting;
One pen core is arranged in this handwriting, and the part of this pen core is given prominence to and is exposed to this handwriting front end, in order to write literal on digiboard, draw or to choose the usefulness of object;
One first coil is wound on first magnetic conduction substance and is arranged on this pen core, the usefulness of giving a digiboard as the emission electromagnetic signal;
One second coil is wound on one second magnetic conduction substance, in order to the electromagnetic signal resonance of being sent with digiboard, and receives the electromagnetic energy that a digiboard is transmitted, and is sent to this first coil, for its emission electromagnetic signal; And
One switch is arranged on this handwriting, in order to control the frequency of the electromagnetic signal that this first coil sent.
2. novel no battery type time writer according to claim 1 is characterized in that being provided with in the wherein said handwriting circuit board.
3. novel no battery type time writer according to claim 2 is characterized in that wherein said circuit board is provided with an oscillatory circuit, in order to the emission electromagnetic signal.
4. novel no battery type time writer according to claim 3 is characterized in that wherein said oscillatory circuit, comprises:
This first coil;
One adjusts circuit and this first coils from parallel connection of coils, finely tunes in order to the electromagnetic signal frequency that this first coil is launched, and makes its frequency accurate; And
One transistor circuit is in order to form the effect of feedback oscillation with first coil.
5. novel no battery type time writer according to claim 3 is characterized in that wherein said circuit board is provided with a resonance circuit, in order to the electromagnetic signal resonance of being sent with digiboard, and receives the electromagnetic energy that digiboard transmits, and is converted into electric energy.
6. novel no battery type time writer according to claim 5 is characterized in that wherein said resonant circuit, comprises:
This second coil; And
One electric capacity and this second coils from parallel connection of coils are in order to store the electromagnetic energy that second coil is received.
7. novel no battery type time writer according to claim 6 is characterized in that being provided with a voltage regulation unit between wherein said resonant circuit and this oscillatory circuit, in order to store the converted electric energy of electromagnetic energy that this resonant circuit receives.
8. novel no battery type time writer according to claim 7 is characterized in that wherein said voltage regulation unit is an electric capacity.
9. novel no battery type time writer according to claim 7 is characterized in that being provided with at least one rectification unit between wherein said resonant circuit and this voltage regulation unit, carries out rectification in order to the electric energy that this resonant circuit is sent to this voltage regulation unit.
10. novel no battery type time writer according to claim 9 is characterized in that wherein said rectification unit is a schottky diode.
11. novel no battery type time writer according to claim 9 is characterized in that an end of wherein said voltage regulation unit is connected with this resonant circuit, and then is provided with this rectification unit between the other end of this voltage regulation unit and this resonant circuit.
12. novel no battery type time writer according to claim 9, an end that it is characterized in that wherein said voltage regulation unit all is connected with this resonant circuit, the other end is ground connection then, make this voltage regulation unit connect, and the two ends of this resonant circuit respectively are provided with this rectification unit with this resonant circuit.
13. novel no battery type time writer according to claim 4 is characterized in that wherein said switch comprises two side push, the electric capacity that each this side push all has a correspondence is arranged in this oscillatory circuit.
14. novel no battery type time writer according to claim 13, it is characterized in that the electric capacity that wherein each this side push is corresponding with it interconnects, and all with first coils from parallel connection of coils, and whether the electric capacity of controlling this side push correspondence by pushing or opening of this side push participates in the running of this oscillatory circuit.
15. novel no battery type time writer according to claim 2, it is characterized in that wherein said second coil be arranged at this circuit board above or below.
16. novel no battery type time writer according to claim 2 is characterized in that wherein said second coil is arranged between this circuit board and this first coil.
17. novel no battery type time writer according to claim 2 is characterized in that wherein said circuit board is arranged between this first coil and this second coil.
18. novel no battery type time writer according to claim 17, it is characterized in that wherein said second coil is entwined by the little lead of an internal resistance, and the number of turns that it twined is many, though and the electromagnetic energy that makes this second coil far still can receive digiboard effectively and sent apart from digiboard.
19. novel no battery type time writer according to claim 17, it is characterized in that the magnetic conduction substance that wherein said second coil is twined is formed by a MnZn material with preferable magnetic conductivity, to strengthen the efficient that this second coil receives the electromagnetic energy that digiboard was sent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101522104A CN102221908A (en) | 2010-04-16 | 2010-04-16 | Novel no-battery type electromagnetic pen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101522104A CN102221908A (en) | 2010-04-16 | 2010-04-16 | Novel no-battery type electromagnetic pen |
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| CN102221908A true CN102221908A (en) | 2011-10-19 |
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| CN2010101522104A Pending CN102221908A (en) | 2010-04-16 | 2010-04-16 | Novel no-battery type electromagnetic pen |
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| CN103902069A (en) * | 2012-12-27 | 2014-07-02 | 株式会社和冠 | Position indicator and capacitor |
| CN108415600A (en) * | 2018-03-09 | 2018-08-17 | 宁波宁大教育设备有限公司 | Time writer handwriting aligning method and device |
| CN110138062A (en) * | 2019-05-21 | 2019-08-16 | 深圳市优笔触控科技有限公司 | Twin coil wireless and passive time writer and its control circuit and control method |
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| WO2020232823A1 (en) * | 2019-05-21 | 2020-11-26 | 深圳市优笔触控科技有限公司 | Dual-coil wireless passive electromagnetic pen and control circuit and control method therefor |
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Application publication date: 20111019 |