CN206884472U - A kind of thermal printing structure that can detect carbon distribution - Google Patents
A kind of thermal printing structure that can detect carbon distribution Download PDFInfo
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- CN206884472U CN206884472U CN201720660595.2U CN201720660595U CN206884472U CN 206884472 U CN206884472 U CN 206884472U CN 201720660595 U CN201720660595 U CN 201720660595U CN 206884472 U CN206884472 U CN 206884472U
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- thermal printing
- thermistor
- carbon distribution
- side thermistor
- protective layer
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Abstract
The utility model proposes a kind of thermal printing structure that can detect carbon distribution,Including thermal printing head and matched printer body,In heating resistor,The surface of individual electrode and public electrode covers the first protective layer,First protective layer is provided with the second protective layer,Some groups of thermistors are provided with first protective layer of heating resistor both sides,Every group of thermistor includes the paper feed side thermistor and paper delivery side thermistor for being symmetrically arranged at heating resistor both sides,Paper feed side thermistor in every group and paper delivery side thermistor are connected,Earth lead ground connection is drawn from the paper feed side thermistor other end,The second test lead from the extraction of the tie point of paper feed side thermistor and paper delivery side thermistor and the first test lead from the extraction of the paper delivery side thermistor other end are connected to the carbon distribution measure loop in printer body through the socket on PCB.Above-mentioned thermal printing structure can detect the carbon deposition quantity accumulated in print procedure, remind user to clear up printhead in good time.
Description
Technical field
Thermal printing field is the utility model is related to, more particularly to a kind of thermal printing structure that can detect carbon distribution.
Background technology
It is well known that the principle of thermal printing, which is thermal printing head, is provided with semiconductor heating element heater, thermal printing head adds
Heat simultaneously contacts the pattern that can after printed thermal media prints needs, and printed thermal media, which is heated after color development, can separate out black
Or the coagulation of white, the side of the secondary Print direction of heating resistor is bonded in, we term it " carbon distribution ".Carbon distribution is serious
Influence the use of thermal printer：First, the accumulation of carbon distribution can influence scattering and disappearing for heat, cause to be in around heating resistor and hold
The continuous condition of high temperature, such state can destroy heating resistor and diaphragm, reduce service life；Secondly, when carbon deposition quantity accumulates
Tire out with heating resistor it is highly close when, lettering effect can be influenceed, cause the phenomenon that lettering is fuzzy.With thermal printing
Application it is more and more extensive, carbon distribution problem has turned into the multiple problem in printer applications, it is therefore desirable to which design is a kind of self
Diagnose the thermal printing structure of carbon deposition quantity.
Utility model content
In order to solve problems of the prior art, the utility model proposes a kind of thermal printing that can detect carbon distribution
Structure, so as to detect the carbon deposition quantity accumulated in print procedure, user is reminded to clear up thermal printing head in good time, with
Exempt to cause lettering unclear and long-term heat accumulation caused by thermal printing head damage problem.
To achieve these goals, the utility model proposes a kind of thermal printing structure that can detect carbon distribution, including heat
Quick printhead and the printer body used is matched with the thermal printing head, the thermal printing head heating resistor,
The surface of individual electrode and public electrode is additionally provided with the second protection covered with the first protective layer on first protective layer
Layer, in paper feed side and paper delivery side, some groups are provided with first protective layer at 100 ~ 200 μm of the heating resistor center
Thermistor, every group of thermistor include the paper feed side thermistor for being symmetrically arranged at heating resistor both sides and paper delivery side heat
Quick resistance, the paper feed side thermistor in every group and paper delivery side thermistor are in series, from paper feed side thermistor
The other end draws earth lead ground connection, draws second from the tie point of paper feed side thermistor and paper delivery side thermistor and surveys
Socket on examination PCB of the wire through the thermal printing head is connected to the carbon distribution measure loop in printer body, from it is described go out
The other end of paper side thermistor draws the carbon distribution that the first test lead is connected to through the socket on the PCB in printer body
Measure loop.
Preferably, the thermistor is made using high temperature resistant scope in 350 ~ 500 DEG C of material.
Preferably, the thickness of the thermistor is 0.2 ~ 0.5 μm.
Preferably, the thickness of second protective layer is 5 ~ 10 μm.
Preferably, the carbon distribution measure loop includes operational amplifier unit, and first test lead and second are surveyed
Examination wire is connected with operational amplifier unit respectively, and the operational amplifier unit is also connected with a/d converter, the AD
Converter is also connected with control unit, and described control unit is also connected with alarm unit.
The beneficial effect of the program of the present utility model is that the above-mentioned thermal printing structure that can detect carbon distribution can detect
The carbon deposition quantity accumulated during thermal printing, user is reminded to clear up thermal printing head in good time, in order to avoid cause lettering not
Printhead caused by clear and long-term heat accumulation damages problem.
Brief description of the drawings
Fig. 1 shows the section structure diagram of the thermal printing head involved by the utility model.
Fig. 2 shows the overlooking the structure diagram of the thermal printing head involved by the utility model.
Fig. 3 shows the connection relationship diagram of the thermistor involved by the utility model.
Fig. 4 shows the electrical block diagram of the carbon distribution measure loop involved by the utility model.
Fig. 5 shows the alarm unit electrical block diagram involved by the utility model.
Reference：1- ceramic substrates, 2- ground glaze layers, 3- heating resistors, the protective layers of 4- first, the protective layers of 5- second,
6- paper feeds side thermistor, 7- paper deliveries side thermistor, 8- packaging plastics, 9-PCB, 10- base stations, 11- control IC, 12- sockets,
13- individual electrodes, 14- public electrodes, 15- earth leads, the test leads of 16- first, the test leads of 17- second, 18-AD conversions
Device, 19- control units, 20- alarm units.
Embodiment
Specific embodiment of the present utility model is further described below in conjunction with the accompanying drawings.
The thermal printing structure that can detect carbon distribution involved by the utility model include thermal printing head and with the heat
The printer body that quick printhead matching uses, wherein the structural representation of the thermal printing head is as Figure 1-3, the heat
Quick printhead includes base station 10, ceramic substrate 1 and PCB 9 is provided with the base station 10, on the surface of the ceramic substrate 1
Partial is provided with ground glaze layer 2, and individual electrode 13 and public electrode 14 are provided with the surface of the ceramic substrate 1 and ground glaze layer 2,
Heating resistor 3 is configured between individual electrode 13 and public electrode 14 along main Print direction, as the hair for producing Joule heat
Hot body, one end of the public electrode 14 are connected along secondary Print direction with the heating resistor 3, its other end and printing electricity
Source is connected；One end of the individual electrode 13 is connected along secondary Print direction with the heating resistor 3, and its other end is with matching somebody with somebody
The control IC11 put on PCB9 is connected, and the packaging plastics such as epoxy resin are used in the ceramic substrate 1 and PCB 9 junction
8 are packaged protection, and the socket 12 for being connected with printer body is additionally provided with the PCB9.More than each part and each
Annexation between part belongs to prior art.
Thermal printing head involved by the utility model is in the heating resistor 3, individual electrode 13 and public electrode
14 surface is additionally provided with the second protective layer 5, second protective layer covered with the first protective layer 4 on first protective layer 4
5 thickness is 5 ~ 10 μm, in paper feed side and paper delivery side, the first protection apart from 100 ~ 200 μm of 3 center of heating resistor
Some groups of thermistors are provided with layer 4, the thermistor can use the GK32CI of similar Hitachi, Ltd's production material system
Into, for the high temperature resistant scope for the thermistor that the material is formed at 350 ~ 500 DEG C, the thickness of the thermistor is 0.2 ~ 0.5 μm,
Every group of thermistor includes the paper feed side thermistor 6 and paper delivery side thermistor for being symmetrically arranged at the both sides of heating resistor 3
7, as shown in figure 3, the paper feed side thermistor 6 in every group and paper delivery side thermistor 7 are in series, from paper feed side temperature-sensitive
The other end of resistance 6 is drawn earth lead 15 and is grounded, from the connection of paper feed side thermistor 6 and paper delivery side thermistor 7
Point draws the second test lead 17 and carbon distribution measure loop in printer body is connected to through the socket 12 on PCB9, from it is described go out
The other end of paper side thermistor 7 draws the product that the first test lead 16 is connected to through the socket 12 on PCB9 in printer body
Carbon measure loop.
Specific carbon distribution measure loop is as shown in figure 4, in the present embodiment, in paper feed side and paper delivery side, described in distance
Symmetrically one group of thermistor is provided with first protective layer 4 at 100 ~ 200 μm of 3 center of heating resistor；Paper feed side thermistor
TM2（Symbol in circuit）It is in series with paper delivery side thermistor TM1, the other end ground connection of the paper feed side thermistor TM2,
The second test lead 17, which is drawn, from the paper feed side thermistor TM2 and paper delivery side thermistor TM1 tie point is connected to type
Number for OPA4241 operational amplifier U1 5 pins, draw the first test from the other end of the paper delivery side thermistor TM1
Wire 16 is connected to 3 pins of the operational amplifier U1, and the other end of the paper delivery side thermistor TM1 is also through first resistor
R1 is connected to+5V power supplys, and 1 pin and 2 pins of the operational amplifier U1 are connected, and 1 pin is additionally coupled to the first diode
D1 positive pole, the negative pole of the first diode D1 are connected to+5V power supplys, the positive pole of the first diode D1 also with the two or two pole
Pipe D2 negative pole is connected, the plus earth of the second diode D2；1 pin of the operational amplifier U1 is additionally coupled to type
Number be AD7993 a/d converter 18；6 pins and 7 pins of the operational amplifier U1 are connected, and 7 pin is additionally coupled to
Four diode D4 positive pole, the negative pole of the 4th diode D4 are connected to+5V power supplys, the positive pole of the 4th diode D4 also with
3rd diode D3 negative pole is connected, the plus earth of the 3rd diode D3；7 pins of the operational amplifier U1 are also
It is connected to a/d converter 18.The a/d converter 18 is also connected with control unit 19, and described control unit 19 can include type
Number control chip for being STM32F407, described control unit 19 controls the action of alarm unit 20.
As shown in figure 5, L terminals are connected with control unit 19, L terminals lead to the circuit structure of the alarm unit 20
The base stage that the 4th resistance R4 is connected to triode Q1 is crossed, L terminals are also connected to power vd D, three pole through 3rd resistor R3
Pipe Q1 grounded emitter, its colelctor electrode are connected to alarm lamp H 2 pins, 1 pin of the alarm lamp H through second resistance R2
It is connected to power vd D.In the present embodiment, the triode Q1 uses model PMBT2222A triode.
During thermal printing is carried out, carbon distribution, the product of carbon distribution can be built up on the second protective layer 5 of paper delivery side
It is tired to influence scattering and disappearing for heat, therefore the temperature of paper delivery side thermistor 7 raises, its resistance can decline, and then cause paper delivery side heat
Voltage at the other end of quick resistance 7 declines, and the operational amplifier U1 is warm by the voltage of paper feed side thermistor 6, paper feed side
The total voltage of quick resistance 6 and paper delivery side thermistor 7, which is transmitted, carries out analog-to-digital conversion into a/d converter 18, and then is sent to control
Computing is carried out in unit 19, when the temperature difference of paper feed side thermistor 6 and paper delivery side thermistor 7 is higher than 15 DEG C, is then triggered
Alarm unit 20 is alarmed.
The thermal printing structure that can detect carbon distribution involved by the utility model is tired out during can detecting thermal printing
Long-pending carbon deposition quantity, user is reminded to clear up thermal printing head in good time, in order to avoid cause lettering unclear and long-term heat accumulation
Caused by printhead damage problem.
Claims (5)
1. a kind of thermal printing structure that can detect carbon distribution, including thermal printing head and match use with the thermal printing head
Printer body, it is characterised in that：The thermal printing head is on the surface of heating resistor, individual electrode and public electrode
Covered with the first protective layer, the second protective layer is additionally provided with first protective layer, in paper feed side and paper delivery side, apart from institute
State and be provided with some groups of thermistors in first protective layer at 100 ~ 200 μm of heating resistor center, every group of thermistor including pair
The paper feed side thermistor and paper delivery side thermistor that are arranged at heating resistor both sides claimed, by the paper feed side temperature-sensitive in every group
Resistance and paper delivery side thermistor are in series, and earth lead ground connection are drawn from the other end of paper feed side thermistor, from institute
The tie point for stating paper feed side thermistor and paper delivery side thermistor draws PCB of second test lead through the thermal printing head
On socket be connected to carbon distribution measure loop in printer body, draw first from the other end of paper delivery side thermistor
Test lead is connected to the carbon distribution measure loop in printer body through the socket on the PCB.
2. the thermal printing structure according to claim 1 that carbon distribution can be detected, it is characterised in that：The thermistor uses
High temperature resistant scope is made in 350 ~ 500 DEG C of material.
3. the thermal printing structure according to claim 1 or 2 that carbon distribution can be detected, it is characterised in that：The thermistor
Thickness be 0.2 ~ 0.5 μm.
4. the thermal printing structure according to claim 1 that carbon distribution can be detected, it is characterised in that：Second protective layer
Thickness is 5 ~ 10 μm.
5. the thermal printing structure according to claim 1 that carbon distribution can be detected, it is characterised in that：The carbon distribution measure loop
Including operational amplifier unit, first test lead and the second test lead are connected with operational amplifier unit respectively,
The operational amplifier unit is also connected with a/d converter, and the a/d converter is also connected with control unit, the control
Unit is also connected with alarm unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720660595.2U CN206884472U (en) | 2017-06-08 | 2017-06-08 | A kind of thermal printing structure that can detect carbon distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720660595.2U CN206884472U (en) | 2017-06-08 | 2017-06-08 | A kind of thermal printing structure that can detect carbon distribution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206884472U true CN206884472U (en) | 2018-01-16 |
Family
ID=61317374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720660595.2U Active CN206884472U (en) | 2017-06-08 | 2017-06-08 | A kind of thermal printing structure that can detect carbon distribution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206884472U (en) |
-
2017
- 2017-06-08 CN CN201720660595.2U patent/CN206884472U/en active Active
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