CN214727492U

CN214727492U - Thermal printing head

Info

Publication number: CN214727492U
Application number: CN202022741289.6U
Authority: CN
Inventors: 王共海; 刘善政; 王立华
Original assignee: Hunan Kaitong Electronic Co ltd
Current assignee: Hunan Kaitong Electronic Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-11-16
Anticipated expiration: 2030-11-24

Abstract

The utility model discloses a thermal printing head belongs to the thermal printing field. The problems that an existing thermal printing head is poor in printing effect and short in service life are solved. The utility model discloses a thermal printing head, be equipped with the underglaze layer on insulating substrate's surface, be equipped with the electrode layer on the surface on underglaze layer, the electrode layer includes single electrode and common electrode, the heating resistor is along main direction of printing configuration between single electrode and common electrode, common electrode's one end is connected with the heating resistor along vice direction of printing, common electrode's the other end is used for being connected with printing power, the one end of single electrode is connected with the heating resistor along main direction of printing, the single electrode other end is connected with the control end, at the heating resistor, single electrode, common electrode's surface covering has the protective layer, the protective layer is including the transparent glass glaze layer and the black glass layer of protection heating resistor, thereby improve the thermal printing head and print the effect, the life that the thermal printing head was beaten has been improved.

Description

Thermal printing head

Technical Field

The utility model relates to a thermal printing field specifically is a thermal printing head.

Background

For a thermal printer, the wording can be understood as: an apparatus for printing by chemical reaction of sensitive elements in a heated state. With the development of the information industry, thermal printers operating in a non-impact manner have many advantages such as low noise, low power consumption, high reliability, high speed, clear printing, convenience in use, and long service life, and are widely used in various fields such as portable terminal printing, electronic cash register (POS) printing, medical ticket printing, facsimile machine output, plate making printing, sticker printing, and bill printing. The Thermal Printer Head (TPH) is the core component of the thermal printer, and the working principle of the TPH is that information collected by a host computer is applied to a heating resistor in a pulse form after being driven by a circuit, and the heating resistor generates Joule heat and directly transfers the Joule heat to the thermochromic thermal printing paper (or transfers the Joule heat to the common paper through a thermal transfer ribbon) in a conduction way, so that image characters are recorded quickly. The thermal print head is an electrothermal conversion component, and its main functional element heating substrate mainly consists of several portions of heat-insulating layer, glaze layer, electrode layer, heating resistor and protective layer. In a working state, the thermal printing head and the thermal printing paper are contacted with each other at a certain pressure intensity, serious abrasion is experienced after long-term use, in order to ensure that the thermal printing head can normally work and prolong the service life, a protective layer is required to be arranged on the surface of a heating substrate, the protective layer in the traditional technology is usually a layer of transparent glass, but the service life of the thermal printing head is short due to the fact that the general transparent glass is low in hardness, high in surface roughness, large in friction coefficient and poor in wear resistance; in addition, the poor thermal conductivity of the transparent glass affects the heat transfer of the heating resistor, and it is difficult to ensure the printing effect of the printing head. Therefore, how to increase the strength, wear resistance, smoothness and thermal conductivity of the protective layer of the thermal print head is an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The hardness that uses transparent glass to be the protective layer to current thermal print head is low, the roughness is high, and coefficient of friction is big, wearability and heat conductivity are poor, lead to thermal print head to print the effect poor, problem that life is short, the utility model provides a thermal print head has improved smoothness, wearability and the heat conductivity of protective layer, has improved thermal print head and has printed the effect, has improved its life.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a thermal printing head, including insulating substrate, ground coat, electrode layer, heating resistor, protective layer, at insulating substrate's surface printing complete or partial ground coat, at the surface printing sintering electrode layer of ground coat, carve out single electrode and common electrode on the electrode layer, again along the thermal printing head main printing direction coating heating resistor, heating resistor disposes between single electrode and common electrode along main printing direction, the one end of common electrode along vice printing direction with heating resistor is connected, the other end of common electrode is used for being connected with printing power supply, the one end of single electrode is connected with heating resistor along main printing direction, the single electrode other end is connected with the control panel, the surface covering of heating resistor, single electrode, common electrode has the protective layer, the protective layer divide into two-layerly, the transparent glaze layer is an insulating transparent glaze layer plated on the surfaces of the heating resistor body, the common electrode and part of the individual electrodes, and the black glass layer is printed on one surface of the transparent glaze layer far away from the heating resistor by a printing mode.

Preferably, the transparent glass glaze layer covers all the common electrodes and the individual electrodes on all the heating resistors and the electrode layers.

Further, the black glass layer completely covers the transparent glass glaze layer.

Further, the thickness of the black glass layer is larger than that of the transparent glass glaze layer.

Further, the electrode layer material is selected from gold or silver.

(III) advantageous effects

The utility model discloses a beneficial effect of this scheme lies in: above-mentioned thermal printing head, its protective layer that generates heat base plate surface and thermal printing paper contact has increased black glass layer, and black glass layer smoothness is high, the wearability is good, the heat conductivity is strong, can resist the wearing and tearing of inferior printing medium when printing, can quick effectual realization heat transfer, the effectual thermal printing head that has strengthened prints effect and life.

Drawings

FIG. 1 is a schematic diagram of a thermal printer.

Fig. 2 is a structure diagram of each layer of the present invention.

FIG. 3 is a schematic diagram of connection between a single electrode and a common electrode in an electrode layer and a heating resistor.

In the figure: 1 insulating substrate, 2 ground coat, 3 electrode layers, 4 transparent glass glaze layers, 5 black glass layers, 6 heating resistors, 7 common electrodes, 8 single electrodes, 9 platen rollers, 10 thermal print heads and 11 thermal paper.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

The first embodiment is as follows:

as shown in fig. 1 to 3, a thermal printer is an apparatus for printing by controlling a heating resistor to transfer heat to a predetermined position on thermal printing paper to cause a chemical reaction of a sensitive element at the position, thereby rapidly recording an image and characters. Therefore, in order to realize heat conduction, in the operating state of the thermal printer, the thermal print head 10 and the thermal printing paper 11 are in contact with each other at a certain pressure at the position of the heat generating substrate of the thermal print head, and the position will experience serious abrasion after long-term use, in order to ensure the normal operation and prolong the service life of the thermal print head, the embodiment provides the thermal print head, the bottom layer uses the insulating substrate 1, a ground coat layer 2 is arranged on the surface of the insulating substrate 1, an electrode layer 3 is arranged on the surface of the ground coat layer, the electrode layers comprise a single electrode 8 and a common electrode 7, a heating resistor 6 is arranged between the single electrode 8 and the common electrode 7 in the main printing direction, one end of the common electrode 7 is connected with the heating resistor 6 along the sub-printing direction, and the other end of the common electrode 7 is used for being connected with a printing power supply; the one end of individual electrode 8 along main direction of printing with heating resistor 6 is connected, the individual electrode 8 other end is connected with the control panel heating resistor 6, the surface covering of individual electrode 8, common electrode 7 have the protective layer, the protective layer includes transparent glass glaze layer 4 and black glass layer 5, black glass layer 5 adopts the printing mode to print transparent glass glaze layer 4 and keeps away from heating resistor 6 one side, and during the printing, heating resistor 6 receives pulse signal and produces joule heat and sees through black glass layer 5 with the conduction mode and transmit for the thermal printer paper 11 that is pressed the paper roller 9 extrusion contact on the base plate that generates heat, produces the printing effect. Because black glass layer 5 smoothness is high, the wearability is good, the heat conductivity is strong, can resist when printing with thermal printing paper 11's wearing and tearing to can quick effectual realization heat transfer, effectual thermal printing head printing effect and life have been strengthened.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a thermal printer head, includes insulating substrate, underglaze layer, electrode layer, heating resistor, protective layer the surface of insulating substrate is equipped with the underglaze layer the surface on underglaze layer is equipped with the electrode layer, the electrode layer includes single electrode and common electrode, heating resistor disposes between single electrode and common electrode along main printing direction, common electrode's one end along vice printing direction with heating resistor is connected, common electrode's the other end is used for being connected with printing power supply, single electrode's one end along main printing direction with heating resistor is connected, the single electrode other end is connected with the control end heating resistor, single electrode, common electrode's surface covering has the protective layer, its characterized in that: the protective layer comprises a transparent glass glaze layer and a black glass layer which are used for protecting the heating resistor.

2. A thermal print head according to claim 1, wherein: and the black glass layer is printed on one surface of the transparent glass glaze layer, which is far away from the heating resistor, in a printing mode.

3. A thermal print head according to claim 1, wherein: the transparent glass glaze layer covers all the heating resistors and all the common electrodes and the single electrodes on the electrode layer.

4. A thermal print head according to claim 1, wherein: the black glass layer completely covers the transparent glass glaze layer.

5. A thermal print head according to claim 1, wherein: the thickness of the black glass layer is larger than that of the transparent glass glaze layer.

6. A thermal print head according to claim 1, wherein: the electrode layer material is selected from gold or silver.