CN202480551U - Thermal head and thermal printer - Google Patents
Thermal head and thermal printer Download PDFInfo
- Publication number
- CN202480551U CN202480551U CN201220090075XU CN201220090075U CN202480551U CN 202480551 U CN202480551 U CN 202480551U CN 201220090075X U CN201220090075X U CN 201220090075XU CN 201220090075 U CN201220090075 U CN 201220090075U CN 202480551 U CN202480551 U CN 202480551U
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- Prior art keywords
- thermal head
- heat
- electrode
- heater
- protective layer
- Prior art date
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Abstract
The utility model provides a thermal head and a thermal printer. The thermal head and the thermal printer are capable of printing even on a printing medium with poor paper quality for long time. The thermal head is connected with the printing medium in a pressing mode through a coining roller, is characterized in that a plurality of heating elements are arranged along an arrangement direction to form a heating unit and form an electrode part on an extending line along the arrangement direction. The abrasion resistance of an electrode protection layer formed on the electrode part is higher than the abrasion resistance of a heating element protection layer formed on the heating unit, and therefore the subject is solved.
Description
Technical field
The utility model relates to thermal head and is equipped with the thermal printer of thermal head.
Background technology
All the time, as patent documentation 1 etc., known have a kind of thermal printer of printed medium through printing on the thermal head that is provided with heater that makes the temperature-sensitive printing usefulness of heat sensitive paper etc.
Fig. 5 is the major part cutaway view of the printing element of the thermal printer 201 put down in writing of patent documentation 1.The thermal head 220 that is equipped on thermal printer 201 is pushed to roller platen 210 sides by helical spring 206, and printed medium P is pressed against between roller platen 210 and the thermal head 220.This thermal printer 201 gives heat through thermal head 220 and makes printed medium P colour developing, thereby carries out printing.
[prior art document]
[patent documentation]
[patent documentation 1] TOHKEMY 2006-88584 communique
Yet; In the thermal printer in the past 201 of above-mentioned that kind; When using papery difference and the big printed medium P of surface roughness to print for a long time, printed medium P wipes the specific region of the total electrode 225 (with reference to Fig. 6) that rubs in the thermal head 220 repeatedly, thus; Wearing and tearing take place and break in the part of total electrode 225, and existence can not be printed such problem.
Fig. 6 is the major part vertical view that is used to explain the general thermal head 220 of this problem.Need to prove that in Fig. 6, the crimping face 211a that 210 pairs of thermal heads of roller platen 220 carry out crimping is represented by double dot dash line.
As shown in Figure 6, on the substrate 223 of thermal head 220, a plurality of heater 221a are wire and arrange and formation heat-generating units 221.In a side of the heat-generating units 221 of wire, a plurality of drive electrodes 224 from drive current to each heater 221a that supply with are formed on the substrate 223, and are connected with not shown drive IC.
In addition, at the opposite side of heat-generating units 221, be formed on the substrate 223 with the promptly total electrode 225 of the shared electrode of each heater 221a conducting.Should extend to drive electrode 224 sides via the contact electrode part 226 on the orientation end that is formed on heat-generating units 221 by total electrode 225, and be connected with not shown outside terminal.
The rotating shaft Ax of roller platen 210 is in order can be expeditiously to push printed medium P and along orientation and thermal head 220 arranged opposite of a plurality of heater 221a to heat-generating units 221, and is fixed on the framework of not shown thermal printer 201.Thermal head 220 is pushed to roller platen 210 sides by helical spring 206, thus, with printed medium P by being pressed between roller platen 210 and the thermal head 220.
In order can reliably printed medium P to be pushed to heat generating body unit 221, the width of roller platen 210 is set at greater than the width dimensions of heat-generating units 221 (the left and right directions size of Fig. 5) at least.Therefore, except applying the pressing force to heat-generating units 221, also the contact electrode part 226 to the orientation end 221c side that is arranged on heat-generating units 221 applies pressing force to roller platen 210 via printed medium P.Thermal head 220 is 211a with the crimping face of roller platen 210, but because roller platen 210 demonstrates with rotating shaft Ax is the drum of center line, therefore in crimping face 211a, especially becomes big near the pressing force of the regional 211b at rotation Ax center.
For the electric current that stream comes from a plurality of heater 221a interflow is flow through, comprise the total electrode 225 of getting in touch with electrode part 226 and form thicklyer than drive electrode 224, heater 221a.On contact electrode part 226 and heater 221a, be formed with the coating that they are protected; But when wearing and tearing take place because of printed medium P in the coating on the contact electrode part 226; Contact electrode part 226 sides softer than coating are concentrated and are worn and torn; Especially as shown in Figure 7, wear and tear with the regional 226a of the opposed contact electrode part 226 of regional 211b of roller platen 210.
When the wearing and tearing of contact electrode part 226 continue and total electrode 225 when being cut off at the regional 226a place of contact electrode part 226, can't be with outside terminal and 225 conductings of total electrode, thus can't drive heat-generating units 221.Therefore, when the printed medium P of long-time use papery difference, possibly can't carry out printing based on thermal printer 201.
The utility model content
Therefore, in view of the above-mentioned problems, even the purpose of the utility model is to provide a kind of long-life thermal head and thermal printer that also can generating electrodes portion broken string when the printed medium to the papery difference prints for a long time.
To achieve these goals, according to the utility model a kind of thermal head is provided, this thermal head is characterized in that having through roller platen crimping printed medium:
Heat-generating units is formed along the orientation arrangement by a plurality of heaters;
Electrode part, it is formed on the extended line of said orientation,
The mar proof that is formed on the electrode protecting layer on the said electrode part is higher than the mar proof that is formed on the heater protective layer on the said heat-generating units.
Thermal head according to the utility model; Because it is higher than the mar proof that is formed on the heater protective layer on the heat-generating units to be formed on the mar proof of the electrode protecting layer on the electrode part, so the tempo of the wearing and tearing of electrode protecting layer is slower than the tempo of the wearing and tearing of heat-generating units.Therefore, electrode part can not firstly appear out from than heat-generating units, thereby can not take place because of the electrode part broken string causes thermal head can not use such unfavorable condition suddenly, thereby a kind of thermal head that can print steadily in the long term can be provided.
In the above-mentioned thermal head of the utility model,
The thickness of said electrode protecting layer can be equal to or greater than the thickness of said heater protective layer.
According to above-mentioned thermal head, even the wearing and tearing that roller platen produces continue, also can heat-generating units be firstly appeared out from than electrode part, therefore a kind of thermal head that can print steadily in the long term can be provided.
In the above-mentioned thermal head of the utility model,
Said heater protective layer can be formed by hard glass.
According to above-mentioned thermal head; The heater protective layer that is formed on the heat-generating units uses and identical in the past hard glass; And electrode protecting layer is formed by the material higher than the mar proof of hard glass, thus, can provide a kind of and have and the thermal head of same heat generation characteristic in the past.Therefore, need not to change especially the such printing control unit of driver etc., therefore can be with the existing thermal printer of thermal head importing of low cost with the high life.
In addition, to achieve these goals, according to the utility model, a kind of following thermal printer is provided, it possesses:
Above-mentioned thermal head;
Printed medium is crimped on the roller platen of said thermal head.
According to above-mentioned thermal printer, even under the situation of long-time printing, before the ordinary life that heat-generating units exposes finished, electrode part can not break, thereby can stably carry out the printing action.
In addition, to achieve these goals,, a kind of following thermal head is provided,, it is characterized in that having through roller platen crimping printed medium according to the utility model:
Heat-generating units, it is arranged along orientation by a plurality of heaters and forms;
Electrode part, it is formed on the extended line of said orientation;
Shared protective layer, it protects said heat-generating units and said electrode part;
Electrode protecting layer, it protects said electrode part,
The mar proof of said electrode protecting layer is higher than the mar proof of said shared protective layer.
Thermal head according to the utility model; Because heat-generating units is only by shared protective layer protection; And electrode part is also protected by the electrode protecting layer higher than the mar proof of shared protective layer except shared protective layer, even therefore wearing and tearing progress, electrode part can not firstly appear out from than heat-generating units yet.Therefore, can not take place because of the electrode part broken string causes thermal head can not use such unfavorable condition suddenly, thereby a kind of thermal head that can print steadily in the long term can be provided.
In the above-mentioned thermal head of the utility model,
Said shared protective layer can be formed on the said electrode protecting layer.
According to above-mentioned thermal head,, also can utilize the electrode protecting layer that is arranged on its lower floor to come guard electrode portion reliably even shared protective layer likewise weares and teares.
In the above-mentioned thermal head of the utility model, it is characterized in that,
Said heater protective layer is formed by hard glass.
According to above-mentioned thermal head; The shared protective layer that is formed on the heat-generating units uses and identical in the past hard glass; And electrode protecting layer is formed by the material higher than the mar proof of hard glass, thus, can provide a kind of and have and the thermal head of same heat generation characteristic in the past.Therefore, need not to change especially printing control unit such as driver etc., can the thermal head of high life be imported existing thermal printer with low cost.
In addition, to achieve these goals, according to the utility model, a kind of thermal printer is provided, it possesses:
Above-mentioned thermal head;
Printed medium is crimped on the roller platen of said thermal head.
According to above-mentioned thermal printer, even under the situation of long-time printing, before the ordinary life that heat-generating units exposes finished, electrode part can not break, thereby can stably carry out the printing action.
Description of drawings
Fig. 1 is the cutaway view of thermal printer of the embodiment of the utility model.
Fig. 2 is the major part enlarged front view of the thermal head of thermal printer shown in Figure 1.
Fig. 3 is the III-III cutaway view of Fig. 2.
Fig. 4 is the figure same with Fig. 3 of thermal head of the variation of the utility model.
Fig. 5 is the cutaway view of the printing element of thermal printer in the past.
Fig. 6 is the major part enlarged front view of the thermal head of thermal printer in the past.
Fig. 7 is the major part enlarged front view of the thermal head of thermal printer in the past.
Symbol description:
1: thermal printer
10: roller platen
11: crimping face
20: thermal head
21: heat-generating units
21a: heater
24: drive electrode
25: total electrode
26: contact electrode part (electrode part)
27a: electrode protecting layer
27b: heater protective layer
27c: electrode protecting layer
27d: shared protective layer
28: illusory heater
30: printing element
P: printed medium
The specific embodiment
Below, with reference to accompanying drawing, the embodiment of the utility model is described.
(overall structure)
Fig. 1 is the cutaway view of thermal printer 1 of the thermal head 20 of the expression embodiment that has been suitable for the utility model.Thermal printer 1 shown in Figure 1 is pressed against the heat-generating units 21 that generates heat on the printed medium P such as heat sensitive paper that develop the color because of heat and prints.
Printing element 30 possesses: rotating shaft is by the roller platen 10 of 2 supportings of housing; The thermal head 20 that is provided with heat-generating units 21 and these roller platen 10 opposed modes.Thermal head 20 is the tabular components that at one end are provided with by the rotating shaft 22 of 2 supportings of housing, is provided with heat-generating units 21 in the position of separating from rotating shaft 22.The force application components such as helical spring 6 that tabular thermal head 20 is fixed in housing 2 by an end are all the time to the roller platen 10 side application of forces.
Fig. 2 is the major part enlarged front view of thermal head 20 shown in Figure 1.On the substrate 23 of thermal head 20, a plurality of heater 21a that constitute heat-generating units 21 are wire along the direction (left and right directions of Fig. 2) with the throughput direction quadrature of printed medium P and arrange.And a plurality of separate drive electrodes 24 are formed on the substrate 23 towards these heaters 21a side from rotating shaft 22 sides, and with each heater 21a conducting.This drive electrode 24 is connected with not shown drive IC, optionally supplies with electric current to heater 21a according to printed data and makes heater 21a heating, thereby carry out printing.
With respect to heat-generating units 21, be provided with the total electrode 25 with each heater 21a conducting at the opposition side of the rotating shaft 22 of thermal head 20.The outside (outside of illustrated orientation end 21b) in the total zone that be formed with heater 21a of electrode 25 on the orientation extended line of heat-generating units 21 possesses contact electrode part (electrode part) 26.
In addition, a plurality of heater 21a are formed on vitreous glass glaze layer 29 (with reference to Fig. 3) in order to make its height and position unanimity.Glass glaze layer 29 is coated in aqueous raw material glass on the substrate 23 and forms, and can make its upper surface smooth thus.Therefore; Even under the concavo-convex situation that has pettiness on the substrate 23; Form the consistent heat-generating units 21 of height and position through on the tabular surface of glass glaze layer 29 upper surface, arranging heater 21a, thereby a kind of thermal printer 1 with high-precision press quality also can be provided.
Extension is arranged to rotating shaft 22 sides to total electrode 25 via contact electrode part 26, will guide to not shown outside terminal to the electric current that heater 21a supplies with from drive electrode 24.Need to prove that owing to the electric current of supplying with to each heater 21a flows into total electrode 25, therefore for sufficient electric current is flow through, total electrode 25 forms thicklyer than drive electrode 24.
The 21b side is formed with illusory heater 28 with contact electrode part 26 position adjacent in the orientation end of heat-generating units 21.This illusory heater 28 is by forming with heater 21a identical materials, but do not connect drive electrode 24, thereby do not generate heat.Illusory heater 28 is provided with for following purpose: through make the heater 21a adjacent with illusory heater 28 around material or shape consistent with the heater 21a that is positioned at the orientation central portion, and make the thermal environment equalization around it.That is,, the heater 21a adjacent with illusory heater 28 and the heater 21a of other orientation central portion are likewise generated heat, thereby it is uneven to avoid producing at the orientation two ends printing through illusory heater 28 is set.Need to prove that at the example of 1 illusory heater 28 shown in Fig. 2, but that illusory heater 28 also can be provided with is a plurality of.
This roller platen 10 that makes printed medium P and thermal head 20 crimping with its rotating shaft Ax mode parallel with the orientation of heat-generating units 21 be configured in heat-generating units 21 directly over.
(electrode protecting layer and heater protective layer)
Fig. 3 is the III-III cutaway view of Fig. 2.As shown in Figure 3, be formed with electrode protecting layer 27a and heater protective layer 27b respectively at the upper surface of contact electrode part 26 and heat-generating units 21, said electrode protecting layer 27a and heater protective layer 27b protect and avoid the wearing and tearing that roller platen 10 produces.This electrode protecting layer 27a is formed by the high material of mar proof than heater protective layer 27b.The hard glass that the mar proof of heater protective layer 27b during by high temperature all the time, hear resistance, heat conductivity etc. are excellent (for example, pyrex etc.) forms.Silicon nitride (the Si of the excellent in wear resistance that therefore, electrode protecting layer 27a can be by than the high temperature of this hard glass the time
3N
4) or sialon formation such as (SiAlON).
So; Contact electrode part 26 is by the electrode protecting layer 27a protection of excellent in wear resistance; Thus; Even wear and tear because of roller platen 10 causes electrode protecting layer 27a and heater protective layer 27b, the rate of wear of electrode protecting layer 27a is also slow than the rate of wear of heater protective layer 27b, thereby can prevent to get in touch with the situation that electrode part 26 firstly appears out from than heat-generating units 21.Therefore, before finishing the normal service life of the thermal head 20 that heat-generating units 21 exposes, contact electrode part 26 can not exposed and break, and therefore can use thermal head 20 to continue printing.
Need to prove; With heater protective layer 27b by forming with same in the past hard glass; And when electrode protecting layer 27a is formed by silicon nitride or sialon; Heat-generating units 21 is through joining with printed medium P with same in the past hard glass, therefore can make the printing characteristic of thermal head 20 of this embodiment identical with in the past thermal head.Therefore, according to the thermal head 20 of this embodiment, under the state of the printing characteristic of keeping thermal head in the past, can prevent to get in touch with the broken string of electrode part 26 and realize long lifetime.Because comparing printing characteristic with thermal head does not in the past change; The drivers of the thermal head 20 that the driving time of the heater 21a when therefore need not to change to printing etc. is set etc. can be with the thermal head 20 importings existing thermal printer of low cost with this embodiment.
In addition, as shown in Figure 3, electrode protecting layer 27a preferably equals or is thicker than heater protective layer 27b.Through the high electrode protecting layer 27a of mar proof being equaled or being thicker than heater protective layer 27b, can prevent the situation that contact electrode part 26 is exposed because of wearing and tearing more reliably.Need to prove, in example shown in Figure 3, after having formed electrode protecting layer 27a, form heater protective layer 27b, but also can after having formed heater protective layer 27b, form electrode protecting layer 27a.
In addition, electrode protecting layer 27a preferably forms with the mode of the upper surface that not only covers contact electrode part 26 but also the side 26a that covers contact electrode part 26 (end of a side opposite with heat-generating units 21 in the orientation of heater 21a).This be because; Because roller platen 10 is formed by the rubber elastomeric material; The crimping face 11 that therefore roller platen 10 may take place produces strain with the mode that the side to contact electrode part 26 bend into, thereby the situation of the side generation wearing and tearing of contact electrode part 26 occurs.
(variation)
Fig. 4 is the figure same with Fig. 3 of thermal head 20a of the variation of the utility model.In this variation, thermal head 20a possesses: thus protect the electrode protecting layer 27c that avoids because of the wearing and tearing of roller platen 10 generations to getting in touch with electrode part 26; The shared protective layer 27d of protection contact electrode part 26 and heat-generating units 21.In this variation, also be that electrode protecting layer 27c is formed by the material higher than the mar proof of shared protective layer 27d.In this variation, also be that electrode protecting layer 27c can be by silicon nitride (Si when shared protective layer 27d is formed by such in the past hard glass
3N
4) or sialon formation such as (SiAlON).
Thermal head 20a according to this variation; Contact electrode part 26 is by the electrode protecting layer 27c protection of excellent in wear resistance; Thus, even wear and tear, also can prevent the situation that contact electrode part 26 firstly appears out from than heat-generating units 21 because of roller platen 10 causes shared protective layer 27d.Therefore, before finishing the normal service life of the thermal head 20 that heat-generating units 21 exposes, contact electrode part 26 can not exposed and break, and therefore can use thermal head 20a to continue printing.
At this, as shown in Figure 4, electrode protecting layer 27c is preferably formed in than shared protective layer 27d by down (apart from roller platen 10 side far away).Even wear and tear equally, also can utilize electrode protecting layer 27c to protect contact electrode part 26 because of roller platen 10 causes shared protective layer 27d.And; If shared protective layer 27d is formed by such in the past hard glass and electrode protecting layer 27c is formed by silicon nitride or sialon; Then can reduce above-mentioned importing cost; In addition, owing to utilize level and smooth hard glass to cover the electrode protecting layer 27c that forms by silicon nitride or sialon etc., therefore can reduce the wearing and tearing of roller platen.
In addition; Same with above-mentioned embodiment; In this variation, also be electrode protective layer 27c with the upper surface that not only covers contact electrode part 26 but also the mode that covers the side 26a (end of the opposition side of heat-generating units 21 in the orientation of heater 21a) of contact electrode part 26 forms.
More than, use embodiment that the utility model has been described, but the technical scope of the utility model is not defined in the scope that above-mentioned embodiment is put down in writing.Self-evident to those skilled in the art is to apply various changes or improvement to above-mentioned embodiment.
Claims (8)
1. thermal head through roller platen crimping printed medium, is characterized in that having:
Heat-generating units is formed along the orientation arrangement by a plurality of heaters;
Electrode part, it is formed on the extended line of said orientation,
The mar proof that is formed on the electrode protecting layer on the said electrode part is higher than the mar proof that is formed on the heater protective layer on the said heat-generating units.
2. thermal head according to claim 1 is characterized in that,
The thickness of said electrode protecting layer is equal to or greater than the thickness of said heater protective layer.
3. thermal head according to claim 1 and 2 is characterized in that,
Said heater protective layer is formed by hard glass.
4. thermal printer, it possesses:
Each described thermal head in the claim 1 to 3;
Printed medium is crimped on the roller platen of said thermal head.
5. thermal head through roller platen crimping printed medium, is characterized in that having:
Heat-generating units, it is arranged along orientation by a plurality of heaters and forms;
Electrode part, it is formed on the extended line of said orientation;
Shared protective layer, it protects said heat-generating units and said electrode part;
Electrode protecting layer, it protects said electrode part,
The mar proof of said electrode protecting layer is higher than the mar proof of said shared protective layer.
6. thermal head according to claim 5 is characterized in that,
Said shared protective layer is formed on the said electrode protecting layer.
7. according to claim 5 or 6 described thermal heads, it is characterized in that,
Said heater protective layer is formed by hard glass.
8. thermal printer, it possesses:
Each described thermal head in the claim 5 to 7;
Printed medium is crimped on the roller platen of said thermal head.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-069523 | 2011-03-28 | ||
| JP2011069523A JP2012201059A (en) | 2011-03-28 | 2011-03-28 | Thermal head and thermal printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202480551U true CN202480551U (en) | 2012-10-10 |
Family
ID=46955008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220090075XU Expired - Fee Related CN202480551U (en) | 2011-03-28 | 2012-03-12 | Thermal head and thermal printer |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2012201059A (en) |
| CN (1) | CN202480551U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103985189A (en) * | 2014-05-13 | 2014-08-13 | 威海华菱光电股份有限公司 | Device for measuring thickness of banknote |
| CN107526275A (en) * | 2016-06-20 | 2017-12-29 | 东芝泰格有限公司 | Heater, heater |
-
2011
- 2011-03-28 JP JP2011069523A patent/JP2012201059A/en not_active Withdrawn
-
2012
- 2012-03-12 CN CN201220090075XU patent/CN202480551U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103985189A (en) * | 2014-05-13 | 2014-08-13 | 威海华菱光电股份有限公司 | Device for measuring thickness of banknote |
| CN107526275A (en) * | 2016-06-20 | 2017-12-29 | 东芝泰格有限公司 | Heater, heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012201059A (en) | 2012-10-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20190312 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |