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 are reasonable in structure, simple and convenient to operate and capable of realizing effective preheating so as to improve the printing quality, and is characterized in that a photo-thermal film is covered above an insulating protective layer. The structure is reasonable, the process is reliable, and the problems of paper sticking, poor first-line printing and the like can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to thermal printing head manufacturing technical field, concretely is a kind of structure reasonable, it is easy to operate, can realize effective preheating, and further improve the printing quality of heating substrate and thermal printing device for thermal printing head. BACKGROUND

[0002] It is known that thermal printing selectively heats printing consumables, such as thermal paper or ribbon, by controlling the heating resistor of the print head to achieve printing of graphics and text. In the field of thermal material science, the heating body of the thermal print head is usually arranged on the heat storage layer of the surface of the ceramic substrate and is electrically connected with the control IC and the common electrode through individual electrode wires. Graphics and text printing is achieved through external signal data control. Under certain conditions, such as heavy thermal paper printing ink, low ambient temperature, dry environment and the like, the print head and the printing consumables may be stuck together, resulting in paper sticking or unclear first-line printing, which affects the printing speed and printing effect. In the field of logistics label printing, the printing consumables, environmental temperature and humidity and printing speed directly affect the printing speed, and preheating of the print head is crucial in low-temperature applications, which directly affects the printing of the first line and the like. SUMMARY

[0003] The utility model proposes a kind of heating substrate and thermal printing device for thermal printing head that can realize effective preheating, and further improve the printing quality in view of the shortcomings and deficiencies in the prior art.

[0004] The utility model reaches by following measure:

[0005] A kind of heating substrate for thermal printing head, it is equipped with ceramic substrate, the surface of ceramic substrate is equipped with heat storage glaze layer, heat storage glaze layer is provided with heating resistor and electrode wire, and the upper surface of at least partial area of heating resistor and electrode wire is equipped with insulating protective layer, it is characterized in that, the upper side of insulating protective layer is covered with light-heat film.

[0006] The light-heat film of the utility model completely covers the heating resistor, and the light-heat film extends to the edge of the heating body on the paper outlet side of the heating resistor, and extends beyond the edge of the heating body on the paper inlet side. The width of the light-heat film is not less than 150 μm, and the thickness ranges from 2 to 4 μm.

[0007] The utility model further provides a control IC on the heating substrate for thermal printing head, one end of the electrode wire is connected with the heating resistor, the other end is connected with the control IC, further, the edge of the insulating protective film exceeds the edge of the heating resistor, and the edge of the protective film completely covers the common electrode, individual electrode and heating resistor except electrode pad.

[0008] The insulating protective film is formed by a magnetron sputtering method.

[0009] The thermal sensitive printing device is provided with a head and a body, the head is hinged to the body, a rubber roller is installed on the head, the thermal sensitive head heating substrate is installed on the body and is located below the rubber roller, the rubber roller is away from the thermal sensitive head heating substrate when the head is lifted, and the thermal sensitive head heating substrate is exposed to visible light.

[0010] The thermal sensitive printing device further comprises an LED light emitting device arranged on the side of the rubber roller of the head and used for light supplementing of the light-heat film.

[0011] The thermal sensitive printing device further comprises a paper feeding motor and a paper conveying mechanism arranged in the body, which are used for feeding paper between the rubber roller and the thermal sensitive head heating substrate and retracting paper after printing starts.

[0012] The thermal sensitive printing device further comprises a temperature measuring component arranged on the thermal sensitive head heating substrate and used for monitoring the temperature of the light-heat film.

[0013] The thermal sensitive printing device can reach a basic temperature of 40-70 DEG C required by thermal sensitive printing, and after reaching the preheating temperature, the light source is isolated by the paper feeding motor, so that the light-heat material is prevented from overheating to reach the color developing temperature of the thermal sensitive paper.

[0014] Compared with the prior art, the thermal sensitive printing device has reasonable structure and reliable process, and can avoid problems such as paper sticking and first line printing failure. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic view of a thermal sensitive printer.

[0016] Figure 2It is a ceramic substrate and rubber roll structure plane schematic view in the utility model.

[0017] Figure 3 It is a ceramic substrate section view in the utility model.

[0018] Sign: heat sensitive printing head with heating base plate 1, ceramic substrate 1-1, heat storage glaze layer 1-2, electrode lead 1-3, insulating protective film 1-4, heating resistance body 1-5, light heat film 1-6, head 2 machine body 3, rubber roll 4, LED light emitting device 5, paper feeding motor 6. Specific implementation:

[0019] The technical scheme in the utility model embodiment will be clearly and completely described below with reference to the drawings.

[0020] As shown in the accompanying Figure 2 Or the accompanying Figure 3 The utility model discloses a heat sensitive printing head with heating base plate, is equipped with ceramic substrate 1-1, and the surface of ceramic substrate 1-1 is equipped with heat storage glaze layer 1-2, and heat storage glaze layer 1-2 is provided with heating resistance body 1-5 and electrode lead 1-3, and the upper surface of at least partial area of heating resistance body 1-5 and electrode lead 1-3 is equipped with insulating protective film 1-4, and the upper surface of insulating protective film 1-4 covers light heat film 1-6.

[0021] The utility model discloses light heat film 1-6 extends to the outside of heating body edge from the paper feeding side of heating resistance body 1-5, and the width of light heat film is no less than 100 μm, and the thickness range is 2-4 μm, and the width of light heat film 1-6 is no less than 100 μm, and the thickness range is 2-4 μm.

[0022] The utility model discloses heat sensitive printing head with heating base plate 1 still is equipped with control IC, and one end of electrode lead is connected with heating resistance body 1-5, and the other end is connected with control IC, further, the edge of insulating protective film 1-4 exceeds the edge of heating resistance body 1-5, and the edge of insulating protective film 1-4 is completely covered with common electrode and individual electrode and heating resistance body except electrode pad.

[0023] The utility model discloses that insulating protective film 1-4 adopts silicon oxide, silicon nitride, silicon oxynitride, sialon film and other insulating protective films, and insulating protective film 1-4 and light heat film 1-6 are all formed by the mode of magnetron sputtering.

[0024] As shown in the accompanying Figure 1The utility model discloses still proposed a kind of thermal printing device, be equipped with head 2 and body main body 3, head 2 and body main body 3 articulate, rubber roller 4 is installed on head 2, as described above thermal print head with heating substrate 1 is installed on body main body 3, and located rubber roller 4 below, rubber roller 4 is away from thermal print head with heating substrate 1 when head 2 is lifted, and thermal print head with heating substrate 1 is exposed under visible light.

[0025] In the thermal printing device, the head 2 is further provided with an LED light emitting device 5 for realizing light supplementing for the light-heat film 1-6.

[0026] In the thermal printing device, the body main body 3 is provided with a paper feeding motor 6 and a paper conveying mechanism.

[0027] In the thermal print head device, a temperature measuring component for monitoring the temperature of the light-heat film 1-6 on the thermal print head with heating substrate 1 is further provided.

[0028] Embodiment 1

[0029] The thermal print head with heating substrate 1 is provided with a light-heat film 1-6 along the length direction of the heating resistor body 1-5 on the paper feeding side of the thermal print head with heating substrate 1 and above the insulating protective film 1-4 above the heating resistor body 1-5, with a width of 200-500 μm and a film thickness of about 2 μm.

[0030] The thermal print head with heating substrate described in the embodiment is provided with a ceramic substrate 1-1, and a heat storage glaze layer 1-2 is formed on the insulating substrate 1-1 in whole or in part, which is printed, dried and sintered on the upper surface of the insulating substrate 1-1. An electrode wire layer and a heating resistor body 1-5 are provided on the heat storage glaze layer 1-2, and a high-thermal-conductivity insulating protective film is provided on the upper surface of the heating resistor body 1-5. A light-heat film 1-6 is covered above the insulating protective film corresponding to the heating resistor body 1-5 and the paper feeding side of the heating resistor body 1-5. The light-heat film 1-6 extends at least from the paper feeding side to the edge of the heating resistor body 1-5. One end of the electrode wire is connected with the heating resistor body 1-5, and the other end is connected with a control IC.

[0031] The edge of the insulating protective film 1-4 covering the part of the heating resistor body 1-5, the individual electrode and the common electrode and the electrode pad exceeds the edge of the heating resistor body 1-5, and the edge of the insulating protective film 1-4 completely covers the common electrode, the individual electrode and the heating resistor body except the electrode pad; the insulating protective film 1-4 adopts the insulating protective film such as silicon oxide, silicon nitride, silicon oxynitride and sialon film, and the insulating protective film 1-4 and the light-heat film 1-6 are both formed by the magnetron sputtering mode; a high-hardness wear-resistant layer can be arranged above the heating resistor body on the insulating protective layer in the occasion with obvious requirement on the printing life, so that the life can be improved by 5-10 times.

[0032] The printing head is assembled in a printing structure, which comprises a printer main body containing a paper feeding motor, a driver, a control panel, a paper feeding rubber roller, a thermal printing head, thermal paper and the like, a rubber roller and an LED lamp strip with a length not greater than the printing width are arranged on the printer head, the printer head is lifted before printing, under the premise that the paper covers the printing head, the paper is returned by the paper feeding motor, the light-heat film is fully exposed to visible light, the light-heat film 1-6 generates heat under the influence of the visible light, the temperature of the heating resistor body is sensed by the thermistor and reaches 40-60 DEG C, the paper is fed by the paper feeding motor to print, the preheating temperature is controlled by the thermistor and is lower than the color developing temperature of the thermal paper, the thermal printing head, especially the heating resistor body part, is fully preheated, the first line printing defect and paper sticking caused by low temperature are avoided, and the sticking of the printing head and the thermal paper is also avoided by the action of the paper returning motor.

[0033] Embodiment 2

[0034] The heating resistor body 1-5 and the individual electrode and the common electrode and the electrode pad are provided with the light-heat film extending along the length direction of the heating resistor body 1-5 on the upper surface of the protective layer above the heating resistor body 1-5, the width is 200-500 mu m, and the film thickness is about 2 mu m.

[0035] The heating resistor body 1-5 and the individual electrode and the common electrode and the electrode pad are provided with the light-heat film extending along the length direction of the heating resistor body 1-5 on the upper surface of the protective layer above the heating resistor body 1-5, the width is 200-500 mu m, and the film thickness is about 2 mu m.

[0036] One end of the electrode wire is connected with the heating resistor body 1-5, the other end is connected with the control IC, further, the edge of the part of the insulating protective film covering the heating resistor body 1-5, the individual electrode and the common electrode and the electrode pad exceeds the edge of the heating resistor body, and the edge of the protective film completely covers the common electrode, the individual electrode and the heating resistor body except the electrode pad.

[0037] The insulating protective film in the utility model adopts insulating protective films such as silicon oxide, silicon nitride, silicon oxynitride and sialon film, and the insulating protective film and the light-heat film are both formed by a magnetron sputtering method.

[0038] In the occasion with significant requirement for printing life, the high-hardness wear-resistant layer arranged above the heat-generating body on the insulating protective layer can improve the life by 5-10 times.

[0039] The printing head is assembled in a printing structure, which comprises a printer main body containing a paper feed motor, a driver, a control panel, a paper feed rubber roller, a thermal printing head, thermal paper and the like, and the feature is that the rubber roller of the printer is integrated with the printer head, the head is lifted before printing, if the paper covers the printing head, the paper is returned by the paper feed motor, the head is opened to fully expose the light-heat film to visible light, the light-heat film is heated by the influence of visible light, the temperature sensed by the thermal resistance on the printing head is not higher than 60 DEG C, the paper is fed by the paper feed motor and printing is started, the preheating temperature is lower than the color developing temperature of the thermal paper, the thermal printing head, especially the heat-generating body part, is fully preheated, the first line printing defect caused by low temperature and paper sticking and the like are avoided, and the sticking of the printing 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 printhead, comprising a ceramic substrate, a heat-accumulating glaze layer provided on a surface of the ceramic substrate, a heat-generating resistor and an electrode lead wire provided on the heat-accumulating glaze layer, and an insulating protective layer provided on at least a part of an upper surface of the heat-generating resistor and the electrode lead wire, characterized in that, The light-heat film is covered above the insulation protective layer.

2. The heat generating substrate for a thermal printhead according to claim 1, wherein The light-heat film extends to the edge of the heat-generating body on the paper-out side of the heat-generating resistor and extends beyond the edge of the heat-generating body on the paper-in side, the width of the light-heat film is not less than 150 μm, and the thickness ranges from 2 to 4 μm.

3. The heat generating substrate for a thermal printhead according to claim 1, wherein The heat-generating substrate for the thermal print head is further provided with a control IC, one end of the electrode wire is connected with the heat-generating resistor, and the other end is connected with the control IC.

4. The heat generating substrate for a thermal printhead according to claim 1, wherein The edge of the insulation protective layer exceeds the edge of the heat-generating resistor, and the edge of the insulation protective layer completely covers the common electrode, the individual electrodes and the heat-generating resistor except the electrode pad.

5. 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 heat-generating substrate for the thermal print head is installed on the main body of the machine body and is located below the rubber roller, the rubber roller is away from the heat-generating substrate for the thermal print head when the head is lifted, and the heat-generating substrate for the thermal print head is exposed to visible light.

6. The thermal printing device according to claim 5, wherein The head is further provided with an LED light-emitting device.

7. The thermal printing device according to claim 6, wherein The LED light-emitting device is arranged on the side of the rubber roller of the head, is realized by an LED light strip, and the length of the LED light strip corresponds to the printing width.

8. The thermal printing device according to claim 5, wherein The main body of the machine body is provided with a paper feed motor and a paper conveying mechanism.

9. The thermal printing device according to claim 5, wherein A temperature measuring component for monitoring the temperature of the light-heat film on the heat-generating substrate for the thermal print head is further provided, and the temperature measuring component is realized by a thermistor.

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