CN211222592U

CN211222592U - Spliced thermosensitive printing head

Info

Publication number: CN211222592U
Application number: CN201921699299.9U
Authority: CN
Inventors: 姜华; 孙华刚; 苏伟
Original assignee: Shandong Hualing Electronics Co Ltd
Current assignee: Shandong Hualing Electronics Co Ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-08-11
Anticipated expiration: 2029-10-09

Abstract

The utility model provides a concatenation formula thermal printhead, it has solved the lower and shorter technical problem of life of the electric power of the current concatenation formula thermal printhead seam department heating resistor body, and it is constituteed by two thermal printhead concatenations at least, and the last heating resistor body of every thermal printhead all includes a plurality of points that generate heat, and the point that generates heat that is in seam department sets up along the slope of seam direction, the utility model discloses can extensively be used for the thermal printing field.

Description

Spliced thermosensitive printing head

Technical Field

The utility model belongs to the technical field of the thermal printing and specifically relates to a concatenation formula thermal print head is related to.

Background

A conventional splicing type thermal print head is composed of at least two thermal print heads spliced together, and each of the thermal print heads has a structure shown in fig. 1, and includes a heat radiation plate 1, an insulating substrate 2 and a printed wiring board 3 are provided on the heat radiation plate 1, a ground coat layer 4 is provided on at least a part of a surface of the insulating substrate 2, a common electrode and an individual electrode are provided on at least a surface of the ground coat layer 4, a heating resistor 5 is disposed between the common electrode and the individual electrode in a main printing direction as a heating element for generating joule heat, and an insulating protective layer 6 is covered on surfaces of the heating resistor 5, the common electrode, and the individual electrode. One end of the common electrode is connected with the heating resistor body 5 along the sub-printing direction, and the other end of the common electrode is connected with a printing power supply; one end of the individual electrode is connected to the heating resistor 5 in the sub-printing direction, and the other end thereof is connected to a control IC (not shown). The control IC may be disposed on the insulating substrate 2 or on the printed wiring board 3, and a joint between the insulating substrate 2 and the printed wiring board 3 is protected by a sealing adhesive 7 such as epoxy resin.

The heating resistor body in each thermal printing head comprises a plurality of heating points, the inclination angles of the heating points are the same, as shown in fig. 2, the inclination angle of each heating point is 90 degrees, and by adopting the structure, when the splicing type thermal printing head works, in order to compensate the phenomenon that the rubber roller contact positions at the splicing seams are different or the printing quality is uneven due to the splicing seam gaps, the printing energy of the corresponding heating points at the splicing seams can be properly increased, so that the service life of the heating resistor body at the splicing seams of the thermal printing head can be shortened.

Disclosure of Invention

The utility model discloses be exactly to the lower and shorter technical problem of life of the electric power resistance of current concatenation formula thermistor head seam department heating resistor body, provide a can improve seam department heating resistor body's resistant electric power and life's concatenation formula thermistor head.

Therefore, the utility model provides a concatenation formula thermal print head comprises two thermal print head concatenations at least, and the resistive element that generates heat on every thermal print head all includes a plurality of points that generate heat, and the point that generates heat that is in piece department sets up along piece direction slope.

Preferably, the joints of the thermal printing head are spliced obliquely.

Preferably, the inclination angle of the heating point at the seam splicing position is larger than 90 degrees.

Preferably, the inclination angle of the rest heating points outside the seam is gradually reduced to 90 degrees from the outside of the seam.

Preferably, the inclination angles of the rest heating points at the outer side of the abutted seam are all 90 degrees.

The utility model discloses beat the slope setting of the some slopes that generate heat of printer head piece department with the temperature sensing, beat the inclination of printer head piece department point that generates heat through every temperature sensing of increase to the corresponding area that generates heat of point of increase piece department prevents the destruction of the resistive element that generates heat of piece department, effectual improvement temperature sensing under the prerequisite of guaranteeing printing quality beats printer head piece department and generates heat the resistant electric power of resistive element, the corresponding life that generates heat of extension temperature sensing printer head piece department.

Drawings

FIG. 1 is a schematic diagram of a thermal print head according to the prior art;

fig. 2 is a schematic structural diagram of a heating resistor at a seam of a splicing type thermal print head in the prior art;

fig. 3 is the structural schematic diagram of the heating resistor body at the joint of the middle-splicing type thermal printhead.

The symbols in the drawings illustrate that:

1. a heat dissipation plate; 2. an insulating substrate; 3. a printed wiring board; 4. a ground coat layer; 5. a heating resistor body; 6. a protective layer; 7. packaging glue; 21. a first insulating substrate; 22. a second insulating substrate; 51. a first heating resistor body; 52. and a second heating resistor body.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the drawings.

Example 1

The utility model provides a concatenation formula thermal printer head comprises two thermal printer head concatenations at least, and wherein every thermal printer head includes heating panel 1 be equipped with insulating substrate 2 and printed circuit board 3 on the heating panel 1 insulating substrate 2's the at least partial underglaze layer 4 that is equipped with in surface is at least the surface of underglaze layer 4 is equipped with common electrode and individuality electrode, and the resistive element that generates heat 5 disposes between common electrode and individuality electrode along main printing direction as the heat-generating body that produces joule heat the surface covering of resistive element that generates heat 5, common electrode and individuality electrode has insulating protective layer 6. One end of the common electrode is connected with the heating resistor body 5 along the sub-printing direction, and the other end of the common electrode is connected with a printing power supply; one end of the individual electrode is connected to the heating resistor 5 in the sub-printing direction, and the other end thereof is connected to a control IC (not shown). The control IC may be disposed on the insulating substrate 2 or on the printed wiring board 3, and a joint between the insulating substrate 2 and the printed wiring board 3 is protected by a sealing adhesive 7 such as epoxy resin.

As shown in fig. 3, the splicing type thermal print head in this embodiment is formed by splicing two thermal print heads, the joints of the two thermal print heads are obliquely spliced, the heating resistor 5 on each thermal print head includes a plurality of heating points, the first heating resistor 51 on the first insulating substrate 21 in the first thermal print head includes a plurality of heating points, 511, 512, … 51n are sequentially arranged from the joint to the outside, the second heating resistor 52 on the second insulating substrate 22 in the second thermal print head includes a plurality of heating points 521, 522, … 52n are sequentially arranged from the joint to the outside, the inclination angle of the heating points at the joint is a1, a1 is arranged at An angle greater than 90 °, the inclination angles of the remaining heating points at the joint to the outside are a2, …, An sequentially, the inclination angles of the rest heating points are gradually reduced to 90 degrees from the seam to the outside, namely A1A 2A … An is 90 degrees.

The areas of the heating points at the joints are marked as S1, and the areas of the other heating points from the joints to the outside are respectively marked as S2, … and Sn; the height of the heating points at the joints is marked as L1, the heights of the other heating points from the joints to the outside are respectively marked as L2, … and Ln, and the height of each heating point is L1> L2> … > Ln; the widths of the heating points at the joints are the same and are all marked as W, and the area formula of each heating point is Sn which is 2W Ln, so that the area S1 of each heating point is S2, …, the inclination angle from the outer side of each thermal printing head to the heating point at the joints is gradually increased, the area of the corresponding heating point at the joints is increased, the damage of the heating resistor at the joints is prevented, the electric power resistance of the heating resistor at the joints of the thermal printing head is effectively improved on the premise of ensuring the printing quality, and the service life of the corresponding heating resistor at the joints of the thermal printing head is prolonged.

Example 2

The rest is the same as the embodiment 1, except that the inclination angles of the rest of the heat generating points at the seams to the outside are all 90 °, that is, a2 is … is An is 90 °, and at this time, the area S1 is greater than S2 is … is Sn, and the inclination angle of the heat generating point at each thermal head seam is increased to increase the area of the corresponding heat generating point at the seam.

However, the above description is only an embodiment of the present invention, and the scope of the present invention should not be limited thereto, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.

Claims

1. The spliced thermal printing head is formed by splicing at least two thermal printing heads, and a heating resistor body on each thermal printing head comprises a plurality of heating points.

2. The spliced thermal print head of claim 1, wherein the splice of the thermal print head is inclined.

3. The tiled thermal print head of claim 1 wherein the angle of inclination of the heat generating dots at the seams is greater than 90 °.

4. The tiled thermal print head of claim 3 wherein the angle of inclination of the remaining heat generating dots outwardly of the seam gradually decreases from the seam outwardly to 90 °.

5. The tiled thermal print head of claim 3 wherein the remaining heat generating dots outside the seam are all tilted at 90 °.