Printing roller for thermal printer

Abstract

The utility model relates to the technical field of thermal printing equipment, in particular to a printing roller for a thermal printer, which comprises a printing head, a printing roller and a label, the label passes between the printing head and the printing roller, one surface of the label close to the printing roller is provided with a bonding layer, two rubber rings with high hardness are fixedly mounted on the outer side of the printing roller, and the printing roller is fixedly mounted on the printing head. And a cylindrical silica gel foaming roller with low hardness is fixedly mounted between the two rubber rings with high hardness. According to the utility model, the rubber rings with high hardness and the cylindrical silica gel foaming roller with low hardness are arranged, the rubber rings with high hardness at the two ends are made of a high-hardness silicon rubber material, so that the deformation of the roller is prevented by virtue of strong force, and meanwhile, the cylindrical silica gel foaming roller with low hardness in the center is made of a foaming material, so that the service life of the roller is prolonged. The hardness is relatively soft, the applied force is reduced, and the contact area between deformation and the label is reduced, so that the label is difficult to roll on the printing roller, and the phenomenon that the label is not discharged from the interior of the printer is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal printing equipment, in particular to a printing roller for a thermal printer. Background Art

[0002] Labels issued by logistics, kitchens, etc. have an adhesive layer on the back in order to be attached to the target object. Usually, the label (medium) is attached to release paper, and the user peels the medium from the release paper and sticks it on the target object. However, the used release paper with the label peeled off can only be discarded, which wastes a lot of time and cost.

[0003] Recently, printers of the type that print directly on a medium without release paper and stick the resulting label on an object have also been introduced to the market. Regarding the adhesive surface on the back of the label, acrylic adhesives with relatively weak adhesive force are used for adhesives used in kitchens, etc. On the other hand, rubber-based adhesives with strong adhesive force are used for the adhesive layer of labels used in the logistics field. The present case relates to a printing roller that also serves as a medium transport relative to the print head of the printer in order to print on a medium without release paper in a printer for issuing labels.

[0004] If label paper (media) is placed on the printer, the adhesive side of the label is attached to the print roller, and the label is attached to the print roller and transported during printing, so the label will be entangled and the label will not be ejected from the printer. This tendency is significant for strongly adhesive labels. If the label sticks to the print roller and is not ejected, the label will be entangled when it is wrapped around the print roller, so the label will be entangled in the printer, and it will take time and effort to remove the label. In addition, it may cause damage to the printer in some cases. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the utility model provides a printing roller for a thermal printer, which can effectively solve the problem in the prior art that labels are easily entangled on the printing roller, resulting in the labels not being discharged out of the printer.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The utility model provides a printing roller for a thermal printer, comprising a printing head, a printing roller and a label, wherein the label passes between the printing head and the printing roller, and an adhesive layer is arranged on a side of the label close to the printing roller, two rubber rings with high hardness are fixedly installed on the outer side of the printing roller, and a cylindrical silicone foaming roller with low hardness is fixedly installed between the two rubber rings with high hardness.

[0008] According to the above-mentioned printing roller for a thermal printer, a printing area is provided on the label, and the printing area is placed between two rubber rings with high hardness.

[0009] According to the above-mentioned printing roller for a thermal printer, the outer diameters of the rubber ring with high hardness and the cylindrical silicone foam roller with low hardness are the same, and the axis of the rubber ring with high hardness coincides with the axis of the cylindrical silicone foam roller with low hardness.

[0010] According to the above-mentioned printing roller for a thermal printer, the width of the cylindrical silicone foam roller with low hardness is greater than the width of the printing area, and the width of the cylindrical silicone foam roller with low hardness is equal to the distance between two rubber rings with high hardness.

[0011] According to the above-mentioned printing roller for a thermal printer, the hardness of the rubber ring with high hardness is different from that of the cylindrical silicone foam roller with low hardness, and the difference in hardness between the rubber ring with high hardness and the cylindrical silicone foam roller with low hardness is more than 15 degrees (measured value of C-type hardness tester).

[0012] According to the above-mentioned printing roller for a thermal printer, the cylindrical silicone foam roller with low hardness is silicone rubber.

[0013] According to the above-mentioned printing roller for a thermal printer, the cylindrical silicone foam roller with low hardness is a foamed product.

[0014] Compared with the known prior art, the technical solution provided by the utility model has the following beneficial effects:

[0015] The utility model provides a rubber ring with high hardness and a cylindrical silicone foam roller with low hardness. Since the rubber rings with high hardness at both ends are made of high hardness silicone rubber material, a strong force is used here to prevent the roller from being deformed. At the same time, the cylindrical silicone foam roller with low hardness in the center is made of foam material, which results in its hardness being relatively soft, thereby reducing the applied force and reducing the contact area between deformation and the label, thereby making it difficult for the label to be rolled onto the printing roller, thereby avoiding the label not being discharged from the inside of the printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a side view of the utility model;

[0019] Figure 3It is a structural schematic diagram of the printing roller of the utility model.

[0020] Figure numerals: 1. print head; 2. print roller; 21. rubber ring with high hardness; 22. cylindrical silicone foam roller with low hardness; 3. label; 31. adhesive layer. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model is further described below in conjunction with embodiments.

[0023] Example: Refer to Figures 1 to 3 A printing roller for a thermal printer includes a printing head 1, a printing roller 2, and a label 3. The label 3 passes between the printing head 1 and the printing roller 2, and an adhesive layer 31 is provided on a side of the label 3 close to the printing roller 2. Two high-hardness rubber rings 21 are fixedly installed on the outer side of the printing roller 2, and a low-hardness cylindrical silicone foam roller 22 is fixedly installed between the two high-hardness rubber rings 21. The material of the high-hardness rubber ring 21 is high-hardness silicone rubber, and the material of the low-hardness cylindrical silicone foam roller 22 is foamed. Due to the high hardness of the high-hardness rubber ring 21, a strong force is used here to prevent the roller from deforming. At the same time, because the low-hardness cylindrical silicone foam roller 22 is relatively soft, the applied force will be reduced, and the contact area between the deformation and the label 3 will be reduced, so that the label 3 is difficult to be rolled onto the printing roller 2, and the label 3 is prevented from being blocked inside the printer.

[0024] A printing area is provided on the label 3, and the printing area is placed between two rubber rings 21 with high hardness. The printing area is the area on the printing medium covered by the print head 1. On the printing medium, the print head 1 prints by thermal transfer, thereby forming the required text, image or barcode and other contents on the printing area.

[0025] The outer diameters of the rubber ring 21 with high hardness and the cylindrical silicone foam roller 22 with low hardness are the same, and the axis of the rubber ring 21 with high hardness coincides with the axis of the cylindrical silicone foam roller 22 with low hardness. By maintaining the same outer diameters of the rubber ring 21 with high hardness and the cylindrical silicone foam roller 22 with low hardness, the distance between the print head 1 and the label 3 can be ensured to remain stable, which helps to ensure uniform printing quality and avoid blurred or uneven printing due to distance changes.

[0026] The width of the low-hardness cylindrical silicone foam roller 22 is greater than the width of the printing area, and the width of the low-hardness cylindrical silicone foam roller 22 is equal to the distance between the two high-hardness rubber rings 21. When printing high-resolution images or barcodes, the softer low-hardness cylindrical silicone foam roller 22 can better adapt to the uneven surface of the printing medium and ensure uniform contact and pressure distribution between the print head 1 and the medium, which helps to reduce the gap between the print head 1 and the medium and improve the clarity and accuracy of printing.

[0027] The hardness of the rubber ring 21 with high hardness is different from that of the cylindrical silicone foam roller 22 with low hardness. The difference in hardness between the rubber ring 21 with high hardness and the cylindrical silicone foam roller 22 with low hardness is more than 15 degrees (measured value of a C-type hardness tester). The hardness difference can be measured by a C-type hardness tester. The difference in hardness between the rubber ring 21 with high hardness and the cylindrical silicone foam roller 22 with low hardness can reduce the pressure on the label 3 and reduce the area where the label 3 is squeezed, making it difficult for the label 3 to be rolled onto the printing roller 2.

[0028] The cylindrical silicone foam roller 22 with low hardness is made of silicone rubber. The cylindrical silicone foam roller 22 with low hardness is a foamed product, so the occurrence of the label 3 being wound around the printing roller 2 can be reduced.

[0029] Comparative examples are shown in the following table:

[0030]

[0031]

[0032] The working principle of the utility model is as follows: when in use, since the outer diameter of the high-hardness rubber ring 21 is the same as that of the low-hardness cylindrical silicone foam roller 22, and the axes of the printing roller 2, the high-hardness rubber ring 21 and the low-hardness cylindrical silicone foam roller 22 are all coincident, it can ensure that the distance between the print head 1 and the label 3 remains stable, which helps to ensure uniform printing quality and avoid blurry or uneven printing due to distance changes. Since the high-hardness rubber ring 21 is made of high-hardness silicone rubber material and the low-hardness cylindrical silicone foam roller 22 is made of foaming material, It is found that the hardness of the rubber ring 21 with high hardness is greater than that of the cylindrical silicone foam roller 22 with low hardness, and the difference in hardness between the rubber ring 21 with high hardness and the cylindrical silicone foam roller 22 with low hardness measured by a C-type hardness meter is more than 15 degrees (measured by a C-type hardness meter). At the same time, since the rubber rings 21 with high hardness at both ends are harder, a strong force is used here to prevent the roller from deforming, while the soft cylindrical silicone foam roller 22 with low hardness in the middle will reduce the applied force, deformation, and the contact area with the label 3 will also be reduced, forming a structure in which it is difficult for the label 3 to be rolled into the printing roller 2.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A printing roller for a thermal printer, comprising a printing head (1), a printing roller (2), and a label (3), characterized in that: The label (3) passes between the print head (1) and the print roller (2), and a side of the label (3) close to the print roller (2) is provided with an adhesive layer (31), two high-hardness rubber rings (21) are fixedly mounted on the outer side of the print roller (2), and a low-hardness cylindrical silicone foaming roller (22) is fixedly mounted between the two high-hardness rubber rings (21).

2. A printing roller for a thermal printer according to claim 1, characterized in that: The label (3) is provided with a printing area, and the printing area is placed between two rubber rings (21) with high hardness.

3. A printing roller for a thermal printer according to claim 1, characterized in that: The outer diameters of the high-hardness rubber ring (21) and the low-hardness cylindrical silicone foaming roller (22) are the same, and the axis of the high-hardness rubber ring (21) coincides with the axis of the low-hardness cylindrical silicone foaming roller (22).

4. A printing roller for a thermal printer according to claim 2, characterized in that: The width of the cylindrical silicone foam roller (22) with low hardness is greater than the width of the printing area, and the width of the cylindrical silicone foam roller (22) with low hardness is equal to the distance between the two rubber rings (21) with high hardness.

5. A printing roller for a thermal printer according to claim 1, characterized in that: The difference in hardness between the rubber ring (21) with high hardness and the cylindrical silicone foaming roller (22) with low hardness is 15 degrees or more (measured value using a C-type hardness tester).

6. A printing roller for a thermal printer according to claim 1, characterized in that: The cylindrical silicone foaming roller (22) with low hardness is silicone rubber.

7. A printing roller for a thermal printer according to claim 1, characterized in that: The cylindrical silicone foaming roller (22) with low hardness is a foamed product.

Images