Heating substrate for thermal printing head and thermal printing device

Abstract

The utility model relates to the technical field of thermal printing head manufacturing, in particular to a heating substrate for a thermal printing head and a thermal printing device, which can effectively realize preheating and further improve the printing quality, and is characterized by further comprising a hydrophobic high-entropy oxide or high-entropy nitride photo-thermal film, the hydrophobic high-entropy oxide or nitride photo-thermal film is arranged in a strip shape and located on the upper surface of the protection layer, and the length direction of the high-entropy oxide or nitride photo-thermal film is the same as the direction of the heating resistor. And the width direction of the hydrophobic high-entropy oxide or nitride photo-thermal film extends from the paper feeding side of the heating resistor body to the edge of the paper discharging side of the heating resistor body, and compared with the prior art, the structure is reasonable, the process is reliable, and the problems of paper sticking, poor first-line printing and the like can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat -sensitive print head manufacturing technical field, concretely is a kind of heat -sensitive print head with heating substrate and heat -sensitive printing device that can effectively realize preheating, and then promote printing quality. BACKGROUND

[0002] It is known that heat -sensitive print head passes through printer control chip and then controls printing data to make heating body selective heating printing consumables, such as heat -sensitive paper or ribbon, to realize printing graphics and text.In the field of heat -sensitive material science, the heating body of heat -sensitive print head is usually arranged on the heat storage layer of ceramic substrate, the heat storage layer is located on the ceramic substrate, and the heating resistor body is electrically connected with control IC and common electrode through individual electrode wire, and graphics and text printing are realized by external signal data control.In individual application conditions, such as heavy heat -sensitive paper printing ink, low ambient temperature, dry environment, etc., it can cause the adhesion between print head and printing consumables, and the problems such as sticking paper or unclear first line printing, which affect printing speed and printing effect.

[0003] According to statistics, in the field of logistics label printing, printing consumables and environmental temperature and humidity and printing speed directly affect printing speed, and preheating of print head in low-temperature environment is very important, which directly affects the printing quality of first line and restricts high-speed printing. SUMMARY

[0004] The utility model discloses in view of the shortcoming and insufficient of prior art, propose a kind of heat -sensitive print head with heating substrate and heat -sensitive printing device with reasonable structure, easy operation, can realize effective preheating in low-temperature environment, and then significantly improve printing effect and printing speed.

[0005] The utility model reaches by following measure:

[0006] A kind of heat -sensitive print head with heating substrate, it is equipped with insulating substrate, heat storage glaze layer is equipped on insulating substrate, heating resistor body is equipped on heat storage glaze layer, electrode wire is also equipped on insulating substrate, electrode wire is connected with heating resistor body, electrode wire and the upper surface of heating resistor body are equipped with protective layer, it is characterized in that, it is also equipped with hydrophobic high-entropy oxide or high-entropy nitride photo-thermal film, the hydrophobic high-entropy oxide or nitride photo-thermal film is arranged in strip and located on the upper surface of protective layer, the length direction of high-entropy oxide or nitride photo-thermal film is same direction with heating resistor body, the width direction of hydrophobic high-entropy oxide or nitride photo-thermal film extends from the paper feeding side of heating resistor body to the edge of paper discharging side of heating resistor body.

[0007] The width range of the hydrophobic high-entropy oxide or nitride photo-thermal film is 200-500 μm, and the thickness range is 2-4 μm.

[0008] The hydrophobic high-entropy oxide or nitride photothermal film has a hydrophobic angle greater than 150 degrees and a water rolling angle less than 5 degrees; and the hydrophobic high-entropy oxide or nitride photothermal film 3 is realized by using the spinel high-entropy oxide photothermal super-hydrophobic anti-icing coating recorded in the patent document CN119101440A.

[0009] The utility model discloses the insulating substrate still is equipped with control IC, and one end of electrode wire links with heating resistance body, and the other end links with control IC.

[0010] The utility model discloses the insulating protective layer is equipped with in the protection layer, and the insulating protective layer edge exceeds the heating resistance body edge, and the insulating protective layer covers the public electrode and individual electrode except electrode pad and heating resistance body.

[0011] The insulating protective layer in the utility model adopts silicon oxide, silicon nitride, silicon oxynitride, sialon film and the like insulating protective layer, and the insulating protective layer and high-entropy oxide or nitride photothermal film are formed by spraying, printing or magnetron sputtering.

[0012] The utility model discloses a kind of thermal printing device, with head and body, head and body articulate, rubber roll is installed on head, as described above, and heat-sensitive print head with heating substrate is installed on body, and located below rubber roll, rubber roll is far from heat-sensitive print head with heating substrate when head is lifted, and heat-sensitive print head with heating substrate is exposed to visible light.

[0013] The utility model discloses the heat-sensitive printing device, head is equipped with LED light emitting device further, for realizing to the hydrophobic high-entropy oxide or nitride photothermal film light supplement, the LED light emitting device is arranged on the side surface of rubber roll of head, and it is realized using LED lamp strip.

[0014] The utility model discloses the heat-sensitive printing device, body is equipped with paper feed motor and paper conveying mechanism in, the paper feed motor and paper conveying mechanism are used to complete paper feeding, paper returning operation between rubber roll and heat-sensitive print head with heating substrate after printing starts, and it is realized using prior art.

[0015] The utility model discloses the heat-sensitive print head device, still be equipped with the temperature measuring component for monitoring the temperature of hydrophobic high-entropy oxide or nitride photothermal film on heat-sensitive print head with heating substrate, and temperature measuring component is realized using thermistor.

[0016] The utility model discloses a heat generating substrate for thermal print head, which belongs to the technical field of thermal printing device.

[0017] Compared with the prior art, the utility model has the advantages of reasonable structure, reliable process and the problems of paper sticking and first-line printing failure can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] BRIEF DESCRIPTION OF DRAWINGS Figure 1 It is the structure schematic diagram of heat generating substrate for thermal print head in the utility model.

[0019] BRIEF DESCRIPTION OF DRAWINGS Figure 2 It is the structure schematic diagram of heat generating substrate for thermal print head in the utility model.

[0020] BRIEF DESCRIPTION OF DRAWINGS Figure 3 It is a kind of section view of heat generating substrate for thermal print head in the utility model.

[0021] Reference signs: insulation base plate 1, heating resistance 2, hydrophobic high-entropy oxide or nitride photo-thermal film 3, machine head 4, machine body main body 5, rubber roller 6, LED light emitting device 7, paper feed motor 8, heat generating substrate for thermal print head 9, electrode wire 10, insulation protective layer 11, heat storage glaze layer 12. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings and examples.

[0023] As shown in the drawings Figure 1As shown, this utility model proposes a heating substrate for a thermal printhead, comprising an insulating substrate 1, a heat-storing glaze layer on the insulating substrate 1, a heating resistor 2 on the heat-storing glaze layer, an electrode wire on the insulating substrate 1, the electrode wire being connected to the heating resistor 2, a protective layer on the upper surface of the electrode wire and the heating resistor 2, and a hydrophobic high-entropy oxide or nitride photothermal film 3. The hydrophobic high-entropy oxide or nitride photothermal film 3 is arranged in a strip shape and located on the upper surface of the protective layer. The length direction of the hydrophobic high-entropy oxide or nitride photothermal film 3 is in the same direction as the length direction of the heating resistor 2, and the width direction of the hydrophobic high-entropy oxide or nitride photothermal film 3 extends at least from the paper feed side of the heating resistor 2 to the edge of the paper output side of the heating resistor 2.

[0024] The width range of the hydrophobic high-entropy oxide or nitride photothermal film 3 described in this invention is 200-500 μm.

[0025] The insulating substrate 1 of this invention is also provided with a control IC. One end of the electrode wire is connected to the heating resistor 2, and the other end is connected to the control IC.

[0026] The protective layer of this utility model includes an insulating protective layer with the edge of the insulating protective layer extending beyond the edge of the heating resistor 2, and the insulating protective layer covering the common electrode, individual electrodes, and heating resistor 2, excluding the electrode pads.

[0027] In this invention, the insulating protective layer is made of silicon oxide, silicon nitride, silicon oxynitride, silicon ionomer, etc. The insulating protective layer and the high-entropy oxide or nitride photothermal film are formed by spraying, printing or magnetron sputtering.

[0028] As attached Figure 2 As shown, this utility model also proposes a thermal printing device, which includes a print head 4 and a main body 5. The print head 4 is hinged to the main body 5. A rubber roller 6 is installed on the print head 4. As described above, the heating substrate for the thermal print head is installed on the main body 5 and located below the rubber roller 6. When the print head 4 is lifted, the rubber roller 6 moves away from the heating substrate for the thermal print head, and the heating substrate for the thermal print head is exposed to visible light.

[0029] In the thermal printing device of this utility model, the print head 4 is also provided with an LED light-emitting device 7, which is used to provide supplemental lighting for the hydrophobic high-entropy oxide or nitride photothermal film 3. The LED light-emitting device 7 is set on the side of the rubber roller 6 on the print head 4 and is implemented by LED light strip.

[0030] In the thermal printing device of this utility model, the main body 5 is provided with a paper feeding motor 8 and a paper conveying mechanism. The paper feeding motor 8 and the paper conveying mechanism are used to complete the paper feeding and paper ejection operations between the rubber roller 6 and the heating substrate of the thermal print head after printing starts, which is achieved by using existing technology.

[0031] The heat-sensitive printing head device also has a temperature measuring component for monitoring the temperature of the hydrophobic high-entropy oxide or nitride photothermal film 3 on the heat-generating substrate of the heat-sensitive printing head, and the temperature measuring component is realized by using a thermistor.

[0032] Embodiment 1:

[0033] The heat-sensitive printing device provided in this example is provided with a head 4 and a body main body 5, the head 4 is hinged to the body main body 5, a rubber roller 6 is installed on the head 4, and the heat-generating substrate for the heat-sensitive printing head described above is installed on the body main body 5 and located below the rubber roller 6. When the head 4 is lifted, the rubber roller 6 is away from the heat-generating substrate for the heat-sensitive printing head, and the heat-generating substrate for the heat-sensitive printing head is exposed to visible light;

[0034] The heat-sensitive printing head device provided in this example is provided with a heat-generating substrate for the heat-sensitive printing head, and the heat-generating substrate for the heat-sensitive printing head is provided with a hydrophobic high-entropy oxide or nitride photothermal film 3. The high-entropy oxide or nitride photothermal film 3 is arranged in a strip shape and located on the upper surface of the protective layer. The length direction of the hydrophobic high-entropy oxide or nitride photothermal film 3 is in the same direction as the length direction of the heat-generating resistor body 2. The width direction of the hydrophobic high-entropy oxide or nitride photothermal film 3 extends from the paper feeding side of the heat-generating resistor body 2 to the edge of the insulating substrate on the paper discharging side of the heat-generating resistor body 2. The hydrophobic high-entropy oxide or nitride photothermal film 3 described in this example is realized by using the spinel high-entropy oxide photothermal super-hydrophobic anti-icing coating described in the patent document CN119101440A.

[0035] The head 4 of this example is also provided with an LED light emitting device 7 for realizing light supplementing of the high-entropy oxide or nitride photothermal film 3. The LED light emitting device 7 is arranged on the side surface of the rubber roller 6 of the head 4 and realized by using an LED light strip. A paper feeding motor 8 and a paper conveying mechanism are arranged in the body main body 5. The paper feeding motor 8 and the paper conveying mechanism are used to complete the paper feeding and discharging operation between the rubber roller 6 and the heat-generating substrate for the heat-sensitive printing head after the printing starts, and realized by using the existing technology.

[0036] The heat-sensitive printing head device described in this example is also provided with a temperature measuring component for monitoring the temperature of the hydrophobic high-entropy oxide or nitride photothermal film 3 on the heat-generating substrate of the heat-sensitive printing head. The temperature measuring component is realized by using a thermistor, which is used to monitor the preheating temperature of the heat-generating substrate for the heat-sensitive printing head, so as to avoid exceeding the preheating threshold (which can be 60°C) and causing the printing consumables to develop color in advance.

[0037] In this example, a high-hardness wear-resistant layer can be arranged directly above the heat-generating body on the insulating protective layer in occasions with significant requirements for printing life, which can improve the life by 5-10 times;

[0038] In this example, the printer head is provided with a rubber roller and an LED lamp strip with a length not greater than the printing width. Before printing, the head is lifted, and under the premise that the paper covers the print head, the paper is returned by the paper feed motor, the high-entropy oxide or nitride photothermal film is fully exposed to visible light, the photothermal film is heated by the influence of visible light, the temperature of the heating body is sensed by the thermistor to reach 40-60℃, the paper feed motor feeds the paper to print, the preheating temperature is controlled by the thermistor to be lower than the color developing temperature of the thermal paper, the thermal print head, especially the heating body part, is fully preheated, the first line printing failure and paper sticking caused by low temperature are avoided, and the adhesion of the print head and the thermal paper is also avoided by the action of the paper return motor.

[0039] Embodiment 2:

[0040] The example provides a heating substrate for a thermal print head and a thermal printing device. In this example, the heating resistor body 2 of the heating substrate for the thermal print head is provided with a hydrophobic high-entropy oxide or nitride photothermal film 3 from the paper feed side to the paper discharge side. The hydrophobic high-entropy oxide or nitride photothermal film 3 extends to the edge of the heating resistor body 2 on the paper discharge side. The high-entropy oxide or nitride photothermal film 3 is arranged on the upper surface of the protective layer, with a width of 200-500μm and a film thickness of about 2μm.

[0041] The example also provides a thermal printing device using the heating substrate for the thermal print head. In the heating substrate for the thermal print head, an electrode wire is provided, one end of the electrode wire is connected to the heating resistor body 2, and the other end is connected to the control IC. The edges of the insulating protective layer covering the heating resistor body, the individual electrode, and the common electrode and electrode pad are beyond the edges of the heating resistor body, and the edges of the protective film completely cover the common electrode, the individual electrode, and the heating resistor body 2 except the electrode pad. In this example, the high-hardness wear-resistant layer arranged above the heating resistor body 2 on the insulating protective layer can improve the service life by 5-10 times.

[0042] The above-mentioned print head is assembled in a printing structure, which includes a printer main body containing a paper feed motor, a driver, a control board, a paper feed rubber roller, a thermal print head, thermal paper, etc. The feature is that the rubber roller of the printer is integrated with the printer head. Before printing, the head is lifted, and if the paper covers the print head, the paper is returned by the paper feed motor. The photothermal film is fully exposed to visible light by opening the head, the photothermal film is heated by the influence of visible light, the temperature sensed by the thermistor on the print head is not higher than 60℃, the paper feed motor feeds the paper and starts printing, the preheating temperature is lower than the color developing temperature of the thermal paper, the thermal print head, especially the heating body part, is fully preheated, the first line printing failure and paper sticking caused by low temperature are avoided, and the adhesion of the print head and the thermal paper is also avoided by the action of the paper return motor.

Claims

1. A heat-generating substrate for a thermal printing head, comprising an insulating substrate, a heat-accumulating glaze layer provided on the insulating substrate, a heat-generating resistor provided on the heat-accumulating glaze layer, and an electrode lead provided on the insulating substrate and connected to the heat-generating resistor, wherein a protective layer is provided on the upper surface of the electrode lead and the heat-generating resistor. The hydrophobic high-entropy oxide or nitride photothermal film is arranged in a strip shape on the upper surface of the protective layer, the length direction of the high-entropy oxide or nitride photothermal film is the same as that of the heating resistor, and the width direction of the hydrophobic high-entropy oxide or nitride photothermal film extends from the paper feeding side of the heating resistor to the edge of the paper discharging side of the heating resistor.

2. The heat generating substrate for a thermal printhead according to claim 1, wherein The width of the hydrophobic high-entropy oxide or nitride photothermal film ranges from 200 to 500 microns.

3. The heat generating substrate for a thermal printhead according to claim 1, wherein The thickness of the high-entropy oxide or nitride photothermal film ranges from 2 to 4 microns.

4. The heat generating substrate for a thermal printhead according to claim 1, wherein The control IC is further arranged on the insulating substrate, one end of the electrode wire is connected to the heating resistor, and the other end is connected to the control IC.

5. The heat generating substrate for a thermal printhead according to claim 1, wherein The insulating protective layer is arranged in the protective layer, the edge of the insulating protective layer exceeds the edge of the heating resistor, and the insulating protective layer covers the common electrode, the individual electrodes and the heating resistor except the electrode pad.

6. The heat generating substrate for a thermal printhead according to claim 1, wherein The insulating protective layer is made of silicon oxide, silicon nitride, silicon oxynitride or sialon film.

7. A thermal printing apparatus provided with a head and a main body, the head being hingedly connected to the main body, a rubber roller being mounted on the head, characterized in that, The heating substrate for the thermal print head according to any one of claims 1-6 is mounted on a main body of a machine body, and is located below a rubber roller, the rubber roller is away from the heating substrate for the thermal print head when the machine head is lifted, and the heating substrate for the thermal print head is exposed to visible light.

8. The thermal printing device according to claim 7, wherein An LED light emitting device is further arranged on the machine head, and is used to realize light supplement for the high-entropy oxide or nitride photothermal film.

9. The thermal printing device according to claim 8, wherein The LED light emitting device is realized by an LED light belt, and the width is not greater than the printing width.

10. The thermal printing device according to claim 7, wherein A paper feeding motor and a paper conveying mechanism are arranged in the main body of the machine body, and a temperature measuring component for measuring the temperature of the high-entropy oxide or nitride photothermal film on the heating substrate for the thermal print head is further arranged, and the temperature measuring component is realized by a thermistor.

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