Thermal printing head with double-glass ground coat structure

Abstract

The utility model discloses a thermal printing head with a double-glass ground glaze structure, and belongs to the technical field of thermal printing heads. Comprising a glass ground coat a located under a driving roller and a glass ground coat b located under the driving roller, the glass ground coat a and the glass ground coat b are both located on a ceramic substrate, and the ceramic substrate is located on a heat dissipation plate. The utility model has the beneficial effects that the printing medium is overlapped on the glass ground glaze b to move, so that the printing medium is prevented from being in contact with the edge of the ceramic substrate, the scratching problem is effectively solved, and the printing medium can smoothly return.

Description

Technical Field

[0001] The utility model relates to a thermal printing head with a double glass bottom glaze structure, belonging to the technical field of thermal printing heads. Background Art

[0002] The existing thermal print head generally has only one glass base for heat storage. Before the printer performs a printing task, it is necessary to calibrate the position of the print medium through the sensor installed on the printer. The calibration process will automatically adjust the position of the print medium. When adjusting the position, the print medium sometimes needs to perform a retraction action. Since the print medium contacts the edge of the ceramic substrate of the print head, and the edge of the ceramic substrate is processed by laser or scriber, it is relatively sharp and can easily scratch the print medium. Figure 1 As shown, the normal retracting action of the printing medium is hindered. Utility Model Content

[0003] In order to solve the defects of the prior art, the purpose of the utility model is to provide a thermal print head with a double glass bottom glaze structure, which can effectively solve the problem of scratching of the printing medium when it is retracted.

[0004] The technical solution of the utility model is: a double glass base glaze structure thermal print head, including a glass base glaze a located directly below a driving roller, and a glass base glaze b located below the driving roller side, the glass base glaze a and the glass base glaze b are both located on a ceramic substrate, and the ceramic substrate is located on a heat sink.

[0005] The glass bottom glaze b is located at the end of the ceramic substrate.

[0006] The glass bottom glaze a is located in the middle of the ceramic substrate.

[0007] The upper surface of the glass bottom glaze b is a curved surface.

[0008] The beneficial effect of the utility model is that the printing medium overlaps and moves on the glass bottom glaze b, thereby avoiding the contact between the printing medium and the edge of the ceramic substrate, effectively solving the scratch problem, and allowing the printing medium to smoothly perform a retracting action. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a working schematic diagram of the existing single glass base glaze thermal print head;

[0010] Figure 2 The utility model is a working schematic diagram of a thermal printing head using glass bottom glaze.

[0011] The reference numerals in the figure are as follows: 1. driving roller, 2. printing medium, 3. glass base glaze a, 4. ceramic substrate, 5. heat sink, 6. glass base glaze b. DETAILED DESCRIPTION

[0012] The following is combined with Figure 2 The utility model is further described as follows:

[0013] A double glass base glaze structure thermal print head, including a glass base glaze a3 located directly below a driving roller 1, and a glass base glaze b6 located below the side of the driving roller 1, wherein the glass base glaze a3 and the glass base glaze b6 are both located on a ceramic substrate 4, and the ceramic substrate 4 is located on a heat sink 5. The glass base glaze b6 is located at the end of the ceramic substrate 4, and the upper surface of the glass base glaze b6 is an arc surface, which is used to contact with the printing medium 2 to reduce the friction with the printing medium 2. The glass base glaze b6 can separate the printing medium 2 from the end of the ceramic substrate 4, effectively preventing the printing medium 2 from scratching the end of the ceramic substrate 4 during movement, so that the printing medium 2 can smoothly retract. The glass base glaze a3 is located in the middle of the ceramic substrate 4, and the driving roller 1 applies force to the glass base glaze a3 in the middle, and the force is transmitted to the middle of the ceramic substrate 4, so that the ceramic substrate 4 is subjected to balanced force, the stability of the system operation is improved, and the printing effect is guaranteed.

[0014] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A double glass bottom glaze structure thermal print head, characterized in that: It comprises a glass base glaze a (3) located directly below a driving roller (1), and a glass base glaze b (6) located below the side of the driving roller (1), wherein the glass base glaze a (3) and the glass base glaze b (6) are both located on a ceramic substrate (4), and the ceramic substrate (4) is located on a heat dissipation plate (5).

2. A double glass bottom glaze structure thermal print head according to claim 1, characterized in that: The glass bottom glaze b (6) is located at the end of the ceramic substrate (4).

3. A double glass bottom glaze structure thermal print head according to claim 1, characterized in that: The glass base glaze a (3) is located in the middle of the ceramic substrate (4).

4. A double glass bottom glaze structure thermal print head according to claim 2, characterized in that: The upper surface of the glass bottom glaze b (6) is a curved surface.

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