JPS61254365A - Platen for thermal printer - Google Patents

Abstract

PURPOSE:To make favorable adhesion between a printing paper and a printing head and contrive higher printing quality, by constituting a platen of a collection of a plurality of split elastic materials, an elastic material a part of which is split in plurality, or a combination thereof. CONSTITUTION:The platen comprises the elastic material 2 fitted to a support frame 1, the elastic body 2 being provided with a plurality of cuts 3 in a direction perpendicular to a printing surface of a head. With the cuts 3 thus provided in the platen, the printing head side of the elastic body 2 is split, and platen is pressed tightly against the printing surface 5 of the head by the split elastic body pieces 2. In addition, the cuts 3 are provided in the moving direction B of the head. The printing surface of the head is brought into close contact with the platen through a printing paper in the position indicated at 6 in the figure.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to the structure of a platen for a thermal printer.

[Prior art j] The structure of the platen of a conventional thermal printer consists of a rubber plate or a rubber roller made of a lump of elastic material.
The smoothness was increased by polishing the surface.

[Problems to be Solved by the Invention] However, in the above-mentioned prior art, when the smoothness of the printing part of the print head is poor or when the pressing force of the print head is not uniform on the printing surface of the print head, the print density is There is a problem that the print quality is not uniform and good print quality cannot be obtained.

The present invention has been devised to solve these problems, and its purpose is to improve the adhesion between the print head and print paper to improve print quality.

[Means for Solving the Problems] The platen for a thermal printer according to the present invention is made by making cuts in the platen made of an elastic material such as rubber in order to improve the adhesion between the print head and the printing paper. It is characterized by being divided into parts. As another means, the adhesion can be improved by constructing the platen from a plurality of blocks of elastic material such as rubber.

[Embodiment j FIG. 1 is a sectional view of a platen and a thermal head for a thermal serial printer in an embodiment of the present invention. The platen has an elastic material 2' attached to a support member 1, and a plurality of notches 5 are provided in the elastic member 2 in a direction perpendicular to the printing surface of the head. 4 is a cross section of the thermal head, and 5 is its printing surface. The printing head side of the elastic body 2 is divided by the notch 3 in the platen.
The divided elastic bodies 2 are tightly pressed against the printing surface of the print head. FIG. 2 is a view (front view) of the platen of FIG. 1 viewed from direction A. As shown by the print head movement direction B, the notch 3 is made in the right and left directions in the figure, and along the print head movement direction. The print surface of the print head is in close contact with the platen through the print paper in a positional relationship as indicated by 5 in the figure.

FIG. 3 is a cross-sectional view of the platen for a thermal serial printer according to the present invention, similar to FIG. It is attached to Glue 1 by adhesive or the like.

The front view of the platen in FIG. 3 is the same as that in FIG. Fourth
Figures (a) to (i) are "embodiments" which are completely modified versions of the embodiments shown in FIGS. (1,) shows an elastic body 7 with cuts 3 made diagonally in one direction.(C) shows something with cuts 3 made diagonally in multiple directions, and (d) shows a vertical cut.

The 3 incisions on the sides of the dice are carefully made. (b) (
Regarding e) and (d), as in the embodiment shown in FIG. 5, the embodiment in which blocks of elastic bodies 7 in the shape surrounded by solid lines are combined can also improve the adhesion between the printing paper and the head.

FIG. 5 shows an embodiment of the present invention in a roller-type platen of a thermal serial printer, in which (a) is a sectional view and (1) is a front view. There is a cutout 3 as shown by the solid line. The roller type platen is also shown in Figure 4 (1).
There is also an embodiment in which the cuts shown in ) to (d) are made on the roller surface.

FIG. 6 shows an embodiment of the present invention in a platen of a thermal line printer having a line head, and (a) is a sectional view thereof, in which 8 is an a-ra made of an elastic body, 9 is a thermal head, and 10 is a thermal head. This is the printing surface of the head.

(b) is a front view, in which a cut 11 is made in the elastic body in a direction perpendicular to the printing surface of the head. The roller shown in FIG. 6 can also be realized by stacking several layers of discs of elastic bodies 8 as shown in FIG. 7, and the adhesion between the printing paper and the head can be improved. In addition, it is also possible to make not continuous cuts on the circumference as in cut 11, but intermittent cuts on the circumference, and diagonal cuts as shown in (1), (C), and (d) in Fig. 4. Also, the adhesion between the printing paper and the head can be improved by cutting the dice. A plate-shaped platen in a thermal line printer (a platen as shown in Figures 1 to 3 in a serial printer) has an elastic body with cuts perpendicular to the printing surface, similar to a roller-type platen. A platen that is made by combining multiple blocks of elastic material with a similar shape to the block on the surface of the elastic material that is divided by making diagonal or dice cuts, or is divided by making cuts, also improves the adhesion between the printing paper and the head. can be improved.

〔Effect of the invention〕

The platen according to the present invention can improve the adhesion between the print paper and the print head, so it has the effect of improving print quality. In addition, according to the platen of the present invention, the adhesion between the printing paper and the print head is improved, so the thermal energy generated for printing is efficiently transmitted to the printing section, so the printing quality is the same as that of the conventional method. This has the effect that printing energy can be reduced.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the platen of the thermal printer of the present invention. FIG. 2 is a front view of FIG. 1. FIG. 5 shows another embodiment of the platen of the thermal printer of the present invention. 4 to 7 show examples of the platen pond of the thermal printer of the present invention. 0, 1.9... Thermal head 6.11... Notch 2.7.8... More than elastic body

Claims (1)

[Claims] A thermal printer that prints using the heat generated in the print head or the thermal ribbon by pressing a thermal ribbon on the printing paper or printing paper interposed between the print head and platen. A platen for a thermal printer is made of a collection of elastic materials, an elastic material in which one part of the material is divided into a plurality of parts, or a combination thereof.