Thermal printing device
By dividing the electrode leads into the first electrode part and the second electrode part, and setting a step-type bottom glaze layer and an inner recess on the surface of the thermal printing head, the contact pressure of the rubber roller and the heating resistor in the low-pressure thermal printing equipment is solved. The problem improves printing quality.
Patent Information
- Application Number
- CN202420472509.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-03-12
AI Technical Summary
In low-pressure thermal printing equipment, the contact pressure between the rubber roller and the heating resistor is insufficient, resulting in poor printing quality. The prior art saves power by increasing the electrode line width and line thickness, but the rubber roller is padded, further reducing the Contact pressure.
The electrode wire is divided into a first electrode part and a second electrode part. The second electrode part is located on the paper outlet side, with a thickness of 15-25 μm, the thickness of the first electrode part is less than 1.0 μm, and the overlap length accounts for the total width of the second electrode part. More than 1/3, and a stepped bottom glaze layer and inner recesses are provided on the surface of the heating substrate to reduce the height difference between the common electrode wire and the heating resistor body, and increase the contact pressure.
Under the premise of energy saving and heat storage, the contact pressure between the rubber roller and the heating resistor is significantly improved, and the printing quality and effect are improved.
Smart Images
Figure CN222246586U_ABST
Abstract
Description
Technical field:
[0001] The utility model relates to the technical field of thermal printing equipment manufacturing, in particular to a thermal printing device with reasonable structure and simple process, which can significantly improve the printing quality of low-voltage thermal printing equipment. Background technology:
[0002] As is known to all, a thermal print head includes an insulating substrate made of insulating material, a heat storage layer is provided on the insulating substrate, and a wire electrode is provided above the heat storage layer. The wire electrode is divided into individual electrodes and common electrodes. The heating resistor band formed on the wire electrode along the main printing direction, the conductive pattern connecting the heating resistor band and the control IC along the secondary printing direction is called an individual electrode, and the conductive pattern connecting the heating resistor and the power supply along the secondary printing direction is called a common electrode. There is a protective layer above the conductive pattern and the heating resistor band. For handheld thermal print heads, because they are battery-powered and belong to low-voltage printing equipment, in order to save energy and increase the heat storage effect during operation, a heat storage layer covering the entire surface of the substrate is often provided. The corresponding protrusion of the heating resistor is small, and the contact pressure with the rubber roller during printing is also reduced. At the same time, in order to reduce the electrode line consumption, the electrode line width and line thickness are often increased. However, the thicker common electrode part will cause the rubber roller to be padded during printing, causing the contact pressure on the heating resistor to be further reduced. Obviously, this will cause the printing consumables to be unable to fully contact with the heating resistor, affecting the printing quality.
[0003] Therefore, there is an urgent need for a thermal printing product that can meet the power saving needs of low-voltage thermal printing equipment, overcome the defect caused by the low contact pressure between the printing rubber roller and the heating resistor, and improve the printing effect. Summary of the invention:
[0004] In view of the shortcomings and deficiencies in the prior art, the utility model proposes a thermal printing device with reasonable structure and simple process, which can significantly improve the printing quality of low-voltage thermal printing equipment.
[0005] The utility model achieves this through the following measures:
[0006] A thermal printing device is provided with a thermal print head, wherein an insulating substrate is provided in a heating substrate for the thermal print head, an underglaze layer is provided on the upper surface of the insulating substrate, a heating resistor and an electrode wire are provided on the underglaze layer, and the electrode wire is characterized in that the electrode wire consists of a first electrode portion and a second electrode portion, the first electrode portion is connected to the heating resistor, the electrode wire arranged on the paper output side and in the area of 0.6mm-1.2mm away from the center of the heating resistor is the second electrode portion, the height of the second electrode portion setting area on the surface of the heating substrate of the thermal print head is lower than the first electrode portion setting area, the thickness range of the second electrode portion is 15-25μm, and the thickness of the first electrode portion is less than 1.0μm.
[0007] In the wire electrode of the utility model, one side of the first electrode part overlaps with the side of the second electrode part close to the heating resistor to achieve the connection of the electrode wires, and the overlapping length of the first electrode part and the second electrode part accounts for more than 1 / 3 of the total width of the second electrode part, thereby ensuring that the electrode wires are reliably connected.
[0008] The thickness of the bottom glaze layer in the area corresponding to the first electrode portion setting area on the surface of the thermal print head of the utility model is greater than the thickness of the bottom glaze layer in the area corresponding to the second electrode portion setting area. Further, the first bottom glaze layer is set on the entire surface of the thermal print head, and the second bottom glaze layer is only set in the area corresponding to the first electrode portion setting area on the first bottom glaze layer. Further, the thickness of the second bottom glaze layer is 5%-10% of the thickness of the first bottom glaze layer. Further, the thickness of the first bottom glaze layer is 180μm, and the thickness of the second bottom glaze layer is 10μm. Accordingly, the thickness of the second electrode portion is 20μm, and the thickness of the first electrode portion is 0.5μm.
[0009] In the heating substrate for the thermal print head of the utility model, an inner recess is provided on the surface of the insulating substrate corresponding to the area where the second electrode portion is set, and the depth range of the inner recess is 10±0.5μm. The surface of the insulating substrate is covered with an underglaze layer of equal thickness, and a second electrode portion with a thickness of 18±1μm and a first electrode portion with a thickness of 0.4±0.1μm are provided on the underglaze layer.
[0010] The heating substrate for the thermal print head of the utility model is also provided with a protective layer covering the electrode wires and the heating resistor.
[0011] The utility model divides the electrode wire into a first electrode part and a second electrode part, so that the second electrode part has a large thickness that can reduce line loss, and at the same time respectively arranges corresponding stepped bottom glaze layers or stepped insulating substrates in the two electrode wire arrangement areas on the surface of the thermal print head heating substrate. Under the premise of ensuring the heat storage and energy saving effect, the height difference between the common electrode wire and the heating resistor is reduced, and the contact pressure between the printing rubber roller and the heating resistor is increased, thereby ensuring the printing quality.
[0012] Compared with the prior art, the utility model has the remarkable advantages of reasonable structure, simple process, good printing effect and the like. Description of the drawings:
[0013] Attached Figure 1 It is a structural schematic diagram of embodiment 1 of the utility model.
[0014] Attached Figure 2 It is a structural schematic diagram of embodiment 2 of the present utility model.
[0015] Attached Figure 3 It is a top view of the utility model.
[0016] Reference numerals: insulating substrate 1 , first underglaze layer 2 , second underglaze layer 3 , first electrode portion 4 , second electrode portion 5 , heating resistor 6 , protective layer 7 . Specific implementation method:
[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0018] Embodiment 1:
[0019] As attached Figure 1 As shown, this example provides a thermal printing device, provided with a thermal print head, wherein an insulating substrate 1 is provided in a heating substrate for the thermal print head, an underglaze layer is provided on the upper surface of the insulating substrate 1, a heating resistor 6 and an electrode wire are provided on the underglaze layer, the electrode wire is composed of a first electrode portion 4 and a second electrode portion 5, the first electrode portion 4 is connected to the heating resistor 6, the second electrode portion 5 is located on the paper discharge side, and the lower edge thereof is 0.6mm-1.2mm away from the center of the heating resistor 6, the second electrode portion 5 is provided on the surface of the heating substrate of the thermal print head, and the height of the second electrode portion 5 setting area is lower than the first electrode portion 4 setting area, the thickness of the second electrode portion 4 is in the range of 15-25μm, and the thickness of the first electrode portion 5 is less than 1.0μm;
[0020] The thickness of the bottom glaze layer in the area where the first electrode portion 4 is set on the surface of the thermal print head in this example is greater than the thickness of the bottom glaze layer in the area where the second electrode portion 4 is set. The first bottom glaze layer 2 is set on the entire surface of the thermal print head, and the second bottom glaze layer 3 is set only in the area corresponding to the area where the first electrode portion 5 is set on the first bottom glaze layer 2. In this example, the thickness of the first bottom glaze layer 2 is 180 μm, and the thickness of the second bottom glaze layer 3 is 10 μm. Correspondingly, the thickness of the second electrode portion 5 is 20 μm, and the thickness of the first electrode portion 4 is 0.5 μm.
[0021] In this example, the first electrode portion 4 and the second electrode portion 5 overlap at their sides, forming an overlapped portion, the overlapped width of which accounts for more than 1 / 3 of the total width of the second electrode portion 5, thereby achieving reliable connection of the electrode wires;
[0022] In this example, after the first electrode portion 4 is etched into a regular comb shape, a part of it is used as a common electrode and a part of it is used as an individual electrode. A heating resistor 6 is arranged at the center of the comb-shaped portion of the first electrode portion 4, and then a second electrode portion 5 is arranged on the first base glaze layer 2. One side of the individual electrode in the first electrode portion 4 is connected to the heating resistor 6, and the other side is connected to the control IC. The second electrode portion 5 is connected to the power supply as a common electrode, and finally a protective layer 7 is formed on the surface of the substrate. In this example, the height difference between the area where the second electrode portion 5 is located (on the paper outlet side and 0.6mm-1.2mm away from the center of the heating resistor) and the heating resistor 6 is reduced from the original 20um to 10um, which significantly reduces the interference of the electrode height on the rubber roller, can increase the rubber roller pressure at the heating resistor 6, and improve the printing concentration.
[0023] Embodiment 2:
[0024] As attached Figure 2 As shown, this example provides a thermal printing device, provided with a thermal print head, wherein an insulating substrate 1 is provided in a heating substrate for the thermal print head, an underglaze layer is provided on the upper surface of the insulating substrate 1, a heating resistor 6 and an electrode wire are provided on the underglaze layer, the electrode wire is composed of a first electrode portion 4 and a second electrode portion 5, the first electrode portion 4 is connected to the heating resistor 6, the second electrode portion 5 is located at the paper outlet side of the heating resistor 6, and the lower edge thereof is 0.6mm-1.2mm away from the center of the heating element 6, the first electrode portion 4 is provided on the surface of the heating substrate of the thermal print head The height of the area where the first electrode portion 4 is set is higher than the area where the second electrode portion 5 is set, the thickness of the second electrode portion 5 ranges from 15 to 25μm, and the thickness of the first electrode portion 4 is less than 1.0μm;
[0025] In the heating substrate for the thermal print head of this embodiment, the surface of the insulating substrate 1 is provided with a concave portion corresponding to the area where the second electrode portion 5 is provided. Figure 2 As shown, the inner concave portion is set along the edge of the insulating substrate 1, and the depth of the inner concave portion is 10 μm. The surface of the insulating substrate 1 is covered with an underglaze layer of equal thickness to ensure the heat storage performance of the handheld low-voltage printing device, thereby ensuring the color concentration, and a second electrode portion 5 with a thickness of 18 μm and a first electrode portion 4 with a thickness of 0.4 μm are set on the underglaze layer;
[0026] In this example, the height difference between the second electrode portion 4 and the heating resistor 6 can be reduced from 18um to 8um, thereby reducing the interference of the electrode height on the rubber roller, increasing the rubber roller pressure at the heating resistor 6, and improving the printing density.
[0027] Compared with the prior art, the utility model has the remarkable advantages of reasonable structure, simple process, good printing effect and the like.
Claims
1. A thermal printing device, provided with a thermal printing head, wherein a heating substrate for the thermal printing head is provided with an insulating substrate, an underglaze layer is provided on the upper surface of the insulating substrate, a heating resistor and an electrode wire are provided on the underglaze layer, characterized in that: The electrode wire consists of a first electrode portion and a second electrode portion, the first electrode portion is connected to a heating resistor, the electrode wire arranged on the paper outlet side and in an area 0.6mm-1.2mm away from the center of the heating resistor is the second electrode portion, the height of the second electrode portion setting area on the surface of the thermal print head heating substrate is lower than the first electrode portion setting area, the thickness range of the second electrode portion is 15-25μm, and the thickness of the first electrode portion is less than 1.0μm.
2. A thermal printing device according to claim 1, characterized in that: In the electrode wire, one side of the first electrode portion overlaps with the side of the second electrode portion close to the heating resistor to achieve connection of the electrode wire, and the overlapping length of the first electrode portion and the second electrode portion accounts for more than 1 / 3 of the total width of the second electrode portion, thereby ensuring that the electrode wires are reliably connected.
3. A thermal printing device according to claim 1, characterized in that: The thickness of the underglaze layer in the area where the first electrode portion is disposed on the surface of the thermal print head is greater than the thickness of the underglaze layer in the area where the second electrode portion is disposed.
4. A thermal printing device according to claim 3, characterized in that: The first underglaze layer is disposed on the entire surface of the thermal print head, and the second underglaze layer is disposed only in an area on the first underglaze layer corresponding to the area where the first electrode portion is disposed.
5. A thermal printing device according to claim 4, characterized in that: The thickness of the second base glaze layer is 5%-10% of the thickness of the first base glaze layer.
6. A thermal printing device according to claim 1, characterized in that: The insulating substrate surface of the heating substrate for the thermal print head has a concave portion corresponding to the second electrode portion setting area, and the insulating substrate surface is covered with an underglaze layer of equal thickness, and the second electrode portion and the first electrode portion are set on the underglaze layer.
7. A thermal printing device according to claim 1, characterized in that: The heating substrate for the thermal print head is also provided with a protective layer covering the electrode wires and the heating resistor.