CN2589202Y - Printer - Google Patents
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- Publication number
- CN2589202Y CN2589202Y CN 02287309 CN02287309U CN2589202Y CN 2589202 Y CN2589202 Y CN 2589202Y CN 02287309 CN02287309 CN 02287309 CN 02287309 U CN02287309 U CN 02287309U CN 2589202 Y CN2589202 Y CN 2589202Y
- Authority
- CN
- China
- Prior art keywords
- type wheel
- voltage value
- driving voltage
- sequential pulse
- time sequential
- 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 - Lifetime
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Abstract
The utility model relates to a printer. A plurality of types are formed on the periphery face of a type wheel rotated and driven by a DC motor, and a sequential pulse generator generates a plurality of sequential pulse sequences which are respectively corresponding to positions of the types on the type wheel along with the rotation of the type wheel. A character selecting mechanism enables the type wheel to be stopped on the position of the prescribed rotation angle by referring to the sequential pulse sequences, and a selected type is selected from the types. A voltage converting circuit converts the voltage provided by a power source into the multistage motor driving voltage, a motor driving circuit drives the DC motor by the motor driving voltage value provided by the voltage converting circuit, and a driving control circuit detects the rotary speed of the type wheel according to the sequential pulse sequences. When the rotary speed exceeds the prescribed value, the voltage converting circuit is controlled to reduce the motor driving voltage.
Description
Technical field
The present invention relates to more particularly, relate to the printer that disposes type wheel selecting type printing mechanism as calculator disposing of using with printer etc. the printer of direct current generator as the printing mechanism of drive source.
Background technology
The printer of using as calculator, a kind of type wheel rotation with a plurality of that drives by direct current generator is arranged in known technology, the time sequential pulse signal that produces according to the text point on the corresponding type wheel comes the selection mechanism of driving power drive-type literal, and therefrom selects the printer of the type wheel selecting type that prints of text line of row.This type wheel selecting type printer, be furnished with on the disk that is disposed on the type wheel rotating shaft with type wheel on the corresponding otch of each text point, generate and the corresponding time sequential pulse signal of each text point by detect these otch with optical mode.Literal selection mechanism when the literal as print object on type wheel is rotated to print position, drives the selection mechanism of electromagnetic drive type literal according to the time sequential pulse signal, makes it stop the rotation of type wheel.
Therefore, serial vein was shorter than this article word select structure of selecting a good opportunity towards the origination interval of signal and carries out literal and select the necessary time of action at that time, then can not carry out literal and select, and caused thus and printed phenomenons such as bad.Therefore, stipulated the higher limit of type wheel rotary speed in order to make literal selection mechanism can carry out the literal selection.
In direct current generator, when in a single day the contact position of brush and commutator changes, the phase angle also can change, and like this, even motor driven voltage is constant, rotary speed also can change.In the ordinary course of things, as shown in Figure 7, as can be seen, along with long-term use, after the contact position of brush and commutator was moved, the phase angle also can produce variation after the initial operational phase of direct current generator compared with the stage after long-term the use.Along with the variation at phase angle, the rotary speed on the motor rated voltage can rise 10～15%.When in a single day the motor rotary speed rises, will cause the literal of literal selection mechanism to select action to lag behind the state that can not carry out the literal selection of the rotation of type wheel so.
Therefore, be by implementing some measure, making the motor rotation number be no more than the rotation number scope (printer function assurance scope) of printer function in the past.For example have, carry out the contact component that switch switches, mechanically control the mechanism of the increase of rotation number by on rotor, being provided with according to centrifugal force.In addition, utilizing the speed power generation machine to detect motor in addition revolves change in rotational speed and controls the electric control mechanism of motor-driven with voltage.
But, dispose the cost that product can improve in such mechanism, therefore, the cheap printer that is not suitable as on the product such as calculator uses.
In addition, under the situation of not setting up said mechanism, be controlled at lower state to motor driven voltage in advance, so that can not exceed printer function assurance scope in the long-term rotary speed of back type wheel of using with regard to needing.Yet this method can be lost print speed, thereby is difficult to realize printing speed.
Summary of the invention
The objective of the invention is, solve the above problems, a kind of printer that disposes type wheel selecting type printing mechanism is provided.And this printer does not need to be provided with mechanical type adjuster and speed power generation machine, and can control the rising with the speed of the prolongation of service time of direct current generator under the prerequisite of not losing print speed.
In order to solve described problem, printer of the present invention comprises: direct current generator; On outer peripheral face, be formed with type wheel a plurality of types and drive rotation by direct current generator; Along with the rotation of this type wheel, produce sequence timer with the corresponding time sequential pulse sequence of position difference of a plurality of types on type wheel; By with reference to this time sequential pulse sequence, this type wheel is stopped on the rotary angle position of regulation, from these a plurality of types, select the literal selection mechanism of one of them selected type; Power supply; The voltage transitions that this power supply is provided is the voltage conversion circuit of multipolar dynamo driving voltage; The motor-drive circuit of direct current generator is provided according to this motor driven voltage value that provides by this voltage conversion circuit; With the rotary speed according to this time sequential pulse Sequence Detection type wheel, when rotary speed surpassed institute's definite value, the control voltage conversion circuit made it reduce the Drive and Control Circuit of motor driven voltage.
It is desirable to, this multipolar dynamo driving voltage value comprises the 1st driving voltage value and the 2nd driving voltage value that is lower than the 1st driving voltage value as initial value at least, this drive control circuit voltage conversion circuit, make the type wheel rotary speed that is detected when this definite value is following, be made as the 1st driving voltage value to this motor driven voltage value, when surpassing this definite value, this motor driven voltage value is made as the 2nd driving voltage value.
Here, it is multistage that this voltage conversion circuit can be set for the 2nd driving voltage value, and this Drive and Control Circuit is selected a rotary speed that makes type wheel and remained on magnitude of voltage below the setting from a plurality of the 2nd driving voltage values.
It is desirable to, this time sequential pulse sequence have with this type wheel on corresponding a plurality of the 1st time sequential pulse sequences in each type position; With one the 1st time sequential pulse after the 1st time sequential pulse sequence, that produce when this type wheel returns initial position, this Drive and Control Circuit detects the rotary speed of type wheel according to the interval of last pulse of the 1st time sequential pulse sequence and the 2nd time sequential pulse.
In addition, also can make this Drive and Control Circuit periodically detect interval in this time sequential pulse sequence in abutting connection with time sequential pulse, and the corresponding predetermined distance value of setting of itself and this type wheel rotary speed compared, when the time sequential pulse that is detected is shorter than predetermined distance at interval, the control voltage conversion circuit reduces the motor driven voltage value.
Here, it is desirable to, this multipolar dynamo driving voltage value comprises the 1st driving voltage value and the 2nd driving voltage value that is lower than the 1st driving voltage value as initial value at least, this drive control circuit voltage conversion circuit, make its pulse spacing that is detected when predetermined distance is above, get the 1st driving voltage value as the motor driven voltage value, during definite value, get the 2nd driving voltage value as the motor driven voltage value being shorter than.
In printer of the present invention, detect the variation that lasts according to selecting with the time sequential pulse sequence, reduction motor driven voltage when surpassing printer function and guarantee the rotary speed of scope as the direct current generator rotation number of drive source along with the type wheel that rotation produced of the type wheel that is driven by direct current generator rotation.
Therefore, even parts such as mechanical speed governor and speed power generation machine are not set, also can eliminate the drawback that the bad grade of action selected in the literal that causes because of the rising of using the direct current generator rotary speed of bringing for a long time on direct current generator.Thereby can realize being applicable to the cheap printer of calculator.
In addition, compare to adapt to because of the long-term situation of the rotation number rising that brings of using with just the rotary speed of direct current generator being descended from the incipient stage, its advantage is because from beginning just not lose print speed at first, so regulation during in can keep all the time fast and print.
Description of drawings
Figure 1A is the block diagram that expression is suitable for type wheel selecting type printer major part of the present invention.Figure 1B is the circuit diagram of its voltage conversion circuit example of expression.
Fig. 2 is that the structure chart with the time sequential pulse generator architecture selected in the literal in presentation graphs 1 printer.
Fig. 3 is the general flowchart of presentation graphs 1 printer action.
Fig. 4 is the sequential chart of a printing interval of presentation graphs 1 printer.
Fig. 5 is the flow chart of initialization process in the presentation graphs 3.
Fig. 6 is the coordinate diagram of the electric moter voltage transformation undertaken by Fig. 1 printer of expression.
Fig. 7 is the coordinate diagram that the rotary speed of expression direct current generator increases along with the prolongation of service time.
The specific embodiment
Below, an example that is suitable for type wheel selecting type printer of the present invention is described with reference to accompanying drawing.
Figure 1A is the block diagram of this routine type wheel selecting type printer major part of expression.The basic comprising of type wheel selecting type printer 1 is the same with printer in the past, have, direct current generator 2 as drive source, drive the rotating shaft 3a of rotation by this direct current generator 2, be arranged on a plurality of literal on the periphery, and can rotate and counterrotating a plurality of the type wheel 3 that is installed on the type wheel 3a with rotating shaft 3a one, in order to stop the rotation with the type wheel 3 of rotating shaft 3a one rotation, make selected literal be positioned at electromagnetic drive type literal selection mechanism 4 on the print position, with the optical profile type sequence timer 5 on the rotating shaft 3a that is installed in type wheel 3.On each type wheel 3, be arranged with a plurality of literal, for example 12 Chinese characters of alignment arrangements.From sequence timer 5, produce position corresponding time sequential pulse signal T with each literal.
In addition, printer 1 has, and printer power supply 6, is the voltage transitions from power supply 6 the 1st and the 2nd magnitude of voltage V
1, V
2(V
1＞V
2) two-stage voltage conversion circuit 7, drive the motor-drive circuit 8 of direct current generator 2 and select the solenoid driver circuit 9 of electromagnet 11 for the literal that drives literal selection mechanism 4 according to the motor driven voltage that provides by voltage conversion circuit 7.This each circuit the 7,8, the 9th, the Drive and Control Circuit 10 that the microprocessor that is made of CPU, ROM, RAM etc. constitutes drive control.
Drive and Control Circuit 10, have, detect the measuring ability of type wheel 3 rotary speeies, detected rotary speed and expression printing function are guaranteed comparing function that the standard rotary speed of the threshold value of scope is compared and under the rotary speed that is detected is above standard the situation of speed according to the time sequential pulse signal T that obtains from sequence timer 5, by switched voltage change-over circuit 7, the 2nd magnitude of voltage V of low voltage side
2Offer the electric moter voltage control function of motor-drive circuit 8 as motor driven voltage Vp.
Figure 1B is the practical circuit of the described voltage conversion circuit 7 of expression.Represented voltage conversion circuit 7 among this figure has, and carries out the conversioning transistor 21 of switch and continues side by side at the colelctor electrode of this transistor 21 and 3 buck diodes 22,23,24 between the emitter stage according to the switching signal S from Drive and Control Circuit 10.Diode 22～24 is connected in series for forward.Transistor 21 when conducting, can obtain high-voltage value V1 according to the switching signal S from Drive and Control Circuit 10, when ending, can obtain by the low voltage value V2 after diode 22～24 step-downs.
Fig. 2 is the mechanical construction drawing of expression sequence timer 5.Sequence timer 5, have on the rotating shaft 3A that is installed in type wheel 3 otch disk 51 and for detect the optical encoders, angle sensors that each otch of forming is made of photo-coupler 52 on this otch disk 51.On otch disk 51, formed many otch, in the drawings,,, used and the unified symbol of each time sequential pulse as shown in Figure 4 described later in order clearly to represent itself and corresponding relation to the time sequential pulse signal of should otch and producing for these otch.
As the otch on the otch disk, be generation and 13 the thin narrow otch of the corresponding literal of each literal on the type wheel 3 with time sequential pulse, T0～T12 forms at a certain angle at interval.In addition, on the adjacent position of otch T0, formed the otch T of broad
S, this time sequential pulse T
SAnd the part that does not have otch between the otch T12.Otch T
SBe in order to make type wheel 3 produce time sequential pulse in last (stage) of the backstroke that turns back to its initial position.
Fig. 3 is the flow chart of expression printer 1 action.Fig. 4 is the sequential chart of a printing interval of expression.The following main action that printer 1 is described with reference to accompanying drawing.At first, the device for opening power supply enters the starting stage (step ST1).By initialization, each drive part is set at position of readiness.Then, import motor drive signal after obtaining print command, at this moment direct current generator 2 begins rotation (step ST2).Rotation drive type wheel 3 by direct current generator 2 begins rotation, each literal on the corresponding type wheel 3, and sequence timer 5 produces time sequential pulse signal T (step ST3).
Drive and Control Circuit 10, time sequential pulse to time sequential pulse signal T is counted, when the literal that must print rotates to assigned position, drive the solenoid driver circuit of control literal selection mechanism, select with electromagnet 11 energisings (step ST4,5) to this literal.Have again, when carrying out this selection action, also print the conveying action of colour band.After the selection of type wheel 3 was all finished, marking roll (figure do not show) will roll extrusion be positioned at the selection literal line part on the type wheel 3, thereby the record-paper between roller and type wheel is carried out the printing (step ST6) of delegation.
After finishing, printing carries out the paper feeding action (step ST7) of delegation's amount.In addition, type wheel 3 is got back to its original state.In the backstroke of type wheel 3, from sequence timer 5, produce time sequential pulse T
S, and with its disable motor power supply (step ST8,9,10) synchronously.Under the situation that will print repeatedly, need implementation step ST repeatedly
3～ST
8Cycle.
Fig. 5 is subprogram (the step ST of Fig. 3 of expression initialization action
1).In the initialization process behind the starting drive power supply,, set the high-voltage value V1 (step ST11) of initial set value as the motor driven voltage VP that offers motor-drive circuit 8 by voltage conversion circuit 7.Then, drive direct current generator 2 (step ST12) by motor-drive circuit 8.Measure the motor rotation and reach the at the uniform velocity literal time sequential pulse interval T PW (step ST13) of the resulting time sequential pulse signal T in rotation back.In addition, measure impulse amplitude (the step ST that resets with time sequential pulse TS
14).Then, measure literal and use time sequential pulse T with resetting with time sequential pulse T12
SInterval T
W(step ST
15).When the interval T of having measured
WBe longer than predefined minimum interval T
WDuring min, promptly when the rotary speed of movable wheel 3 are printer function when guaranteeing speed in the scope, the value that makes motor driven voltage VP is still as high-voltage value V
1Finish initial actuating.
In contrast, when the interval T of having measured
WBe shorter than minimum interval T
WDuring mni, in other words, when the rotary speed of type wheel 3 surpasses the speed of printer action assurance scope, want the changing voltage change-over circuit, make the value of motor driven voltage VP convert the superior value V2 of low-voltage (step ST16,17) to.
In the printer of the present embodiment that so constitutes, as shown in Figure 6, when bringing into use, the driving voltage of direct current generator 2 is set at high-voltage value V1.After printer is through long-term the use, direct current generator 2 as previously mentioned, the contact position of its brush and commutator is subjected to displacement, and the phase angle is changed, and causes that rotating speed rises under the situation of rated voltage.Consequently, shown in the solid line among the figure, the rotary speed of type wheel 3 has surpassed the line L of expression printing function assurance range limit speed.
But, in the present embodiment, when the rotation number that detects type wheel 3 surpasses threshold value L, the driving voltage value of direct current generator 2 is converted to low voltage value V2.Its result, the rotation number of type wheel 3 are suppressed in shown in the dotted line among the figure below the threshold value L, have so just guaranteed stable printing action.
According to the printer 1 of present embodiment, can utilize the time sequential pulse signal T that produces from existing sequence timer 5 to detect the rotary speed of type wheel 3, when this rotary speed rises to setting when above, reduce the driving voltage of direct current generator 2.Therefore do not need parts such as mechanical speed governor or speed power generation machine, and, owing to can avoid disadvantages such as the printing that rising caused of rotary speed of the type wheel 3 that brings because of long-term use is bad, therefore can control the cost of manufacture of printer, thereby be fit to it is used with printer as calculator.
In addition, in the present embodiment,, therefore, help reducing the cost of manufacture of printer owing to be to use cheap diode circuit to realize the conversion of motor driven voltage.
And, owing to can carry out the conversion of electric moter voltage, thus with by from just low at first motor driven voltage control, with the situation difference of control type wheel rotary speed, from beginning can not lose print speed, thereby can realize printing speed to specified time limit.
In described embodiment, be according to regularly pulse signal T12 and regularly pulse signal T
SInterval T
WDetect the rotary speed of type wheel, and this interval T
WWith minimum interval T
WMin compares.On the contrary, detect the adjacent pulse interval T P of literal with time sequential pulse T0～T12
WAfter, this pulse spacing TP
WGuarantee that with printer function the corresponding minimum pulse interval T of scope pwmin compares, at TP
W＞TP
WAnti-motor driven voltage is as high-voltage value under the situation of min, but be not TP
W＞TP
WAlso can be converted to low voltage value V2 to motor driven voltage under the situation of min.
In addition, be that the value of motor driven voltage is converted to V1, V2 two-stage in described example, but also can constitute the multistage switching controls more than three grades.
In above-mentioned example, the switching motion of differentiating motor driven voltage is to carry out in the initialization process stage behind the starting drive power supply.But also can for example differentiate in other time in the moment that does not also print action.In this case, when the conversion driving voltage, just can as long as carry out initialization process once again.
Claims (6)
1, a kind of printer is characterized in that: comprising: direct current generator; On outer peripheral face, be formed with type wheel a plurality of types and drive rotation by direct current generator; Along with the rotation of this type wheel, produce sequence timer with the corresponding time sequential pulse sequence of position difference of a plurality of types on type wheel; By with reference to this time sequential pulse sequence, this type wheel is stopped on the rotary angle position of regulation, from these a plurality of types, select the literal selection mechanism of one of them selected type; Power supply; The voltage transitions that this power supply is provided is the voltage conversion circuit of multipolar dynamo driving voltage; The motor-drive circuit of direct current generator is provided according to this motor driven voltage value that provides by this voltage conversion circuit; With the rotary speed according to this time sequential pulse Sequence Detection type wheel, when rotary speed surpassed institute's definite value, the control voltage conversion circuit made it reduce the Drive and Control Circuit of motor driven voltage.
2, printer according to claim 1, it is characterized in that: this multipolar dynamo driving voltage value comprises the 1st driving voltage value and the 2nd driving voltage value that is lower than the 1st driving voltage value as initial value at least, this drive control circuit voltage conversion circuit, make the type wheel rotary speed that is detected when this definite value is following, be made as the 1st driving voltage value to this motor driven voltage value, when surpassing this definite value, this motor driven voltage value is made as the 2nd driving voltage value.
3, printer according to claim 1 is characterized in that: this time sequential pulse sequence have with this type wheel on corresponding a plurality of the 1st time sequential pulse sequences in each type position; With one the 1st time sequential pulse after the 1st time sequential pulse sequence, that produce when this type wheel returns initial position, this Drive and Control Circuit detects the rotary speed of type wheel according to the interval of last pulse of the 1st time sequential pulse sequence and the 2nd time sequential pulse.
4, printer according to claim 2, it is characterized in that: this voltage conversion circuit can be set the 2nd driving voltage value for multistage, and this Drive and Control Circuit is selected a rotary speed that makes type wheel and remained on magnitude of voltage below the setting from a plurality of the 2nd driving voltage values.
5, printer according to claim 1, it is characterized in that: this Drive and Control Circuit periodically detects the interval in abutting connection with time sequential pulse in this time sequential pulse sequence, and the corresponding predetermined distance value of setting of itself and this type wheel rotary speed compared, when the time sequential pulse that is detected is shorter than predetermined distance at interval, the control voltage conversion circuit reduces the motor driven voltage value.
6, printer according to claim 5, it is characterized in that: this multipolar dynamo driving voltage value comprises the 1st driving voltage value and the 2nd driving voltage value that is lower than the 1st driving voltage value as initial value at least, this drive control circuit voltage conversion circuit, make its pulse spacing that is detected when predetermined distance is above, get the 1st driving voltage value as the motor driven voltage value, during definite value, get the 2nd driving voltage value being shorter than as the motor driven voltage value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001356192 | 2001-11-21 | ||
| JP2001356192A JP2003154637A (en) | 2001-11-21 | 2001-11-21 | Driving control method of printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2589202Y true CN2589202Y (en) | 2003-12-03 |
Family
ID=19167760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02287309 Expired - Lifetime CN2589202Y (en) | 2001-11-21 | 2002-11-19 | Printer |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2003154637A (en) |
| CN (1) | CN2589202Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435470C (en) * | 2005-03-09 | 2008-11-19 | 丰田自动车株式会社 | Load drive device, vehicle, and abnormality processing method in load drive device |
| CN102848742A (en) * | 2011-06-30 | 2013-01-02 | 精工爱普生株式会社 | Tape printer control method and tape printer |
| CN111098604A (en) * | 2018-10-26 | 2020-05-05 | 精工爱普生株式会社 | Printing apparatus and control method of printing apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009125993A (en) * | 2007-11-21 | 2009-06-11 | Seiko Epson Corp | Recording device and recording method |
-
2001
- 2001-11-21 JP JP2001356192A patent/JP2003154637A/en not_active Withdrawn
-
2002
- 2002-11-19 CN CN 02287309 patent/CN2589202Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435470C (en) * | 2005-03-09 | 2008-11-19 | 丰田自动车株式会社 | Load drive device, vehicle, and abnormality processing method in load drive device |
| CN102848742A (en) * | 2011-06-30 | 2013-01-02 | 精工爱普生株式会社 | Tape printer control method and tape printer |
| CN102848742B (en) * | 2011-06-30 | 2015-04-29 | 精工爱普生株式会社 | Tape printer control method and tape printer |
| CN111098604A (en) * | 2018-10-26 | 2020-05-05 | 精工爱普生株式会社 | Printing apparatus and control method of printing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003154637A (en) | 2003-05-27 |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121119 Granted publication date: 20031203 |