JPH01178477A - Printer - Google Patents

Abstract

PURPOSE:To prevent a paper from being torn, by a method wherein the right and left ends of a card holder are rounded with more than or equal to a specific dimension and disposed apart from the surface of a platen by a specific distance. CONSTITUTION:A card holder 14 is so constructed as that the right and left ends are rounded to 3mm or more and disposed apart from the surface of a platen by 3cm or more. The card holder 14 is fitted to a printing head 11, and an ink ribbon cartridge 15 is mounted thereon. The card holder 14 is rounded at the right and left ends, for example, with a radius 17 of 4mm, and the right and left ends are spaced from a platen by a distance 18 of 5mm. When a carriage conducts printing actually with the printing head 11 and the card holder 14 integrally formed, the printing head is moved transversely by a motor. In this manner, a gap between the platen and the card holder, which is large at the both ends and gradually becomes small, enables the head to move smoothly on the paper without breaking the paper even if the head conducts printing from outside a paper.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printer, and more particularly to a serial printer having a card holder for holding paper.

[Conventional technology]

Conventionally, this type of serial printer prints by moving a print head by a motor, and a structure as shown in FIG. 2 is known. This conventional printer has a structure in which paper is inserted between a print head 21 and a platen 22, and includes a paper presser 23 for holding the paper and a card holder 24 for holding the paper around the head during printing.

As shown in FIG. 3, this type of serial printer usually has a print head 21 and a card holder 24 integrated, and an ink ribbon cartridge 26 mounted on the print head 21, which is connected by a motor. The card holder 24 is moved from side to side by the holder to slide the card holder 24 onto the paper 26 to perform printing.

[Problem that the invention seeks to solve]

Conventionally, in this type of serial printer, when the initial position of the head is outside the paper as shown in FIG. 3, the head moves toward the paper and attempts to print. This has the disadvantage that the edges of the paper collide with each other, causing the paper to tear.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a printer that can print normally without tearing the paper even if printing is started when the head is positioned outside the paper.

[Means for solving problems]

The printer of the present invention has a print head and a card holder for holding paper around the print head, and the left and right ends of the card holder are circles of 3 or more circles, and the left and right ends are 3CI1 from the platen surface.
It has a structure that is separated by one or more.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a cross section passing through the axes of the head and platen in one embodiment of the present invention. In FIG. A card holder 4 is attached to the print head 11, and an ink ribbon cartridge 15 is further mounted thereon. The card holder 14 is rounded at both left and right ends, the radius 17 of the circle is four lengths, and the distance 18 from the platen at both left and right ends is five lengths. The print head 11 and the card holder 14 are integrated, and the carriage moves the print head left and right by a motor when actually printing.

In this configuration, the left and right edges of the card holder are rounded, so even if you try to print from the head on the outside of the paper, the gap between the platen and card holder widens at the edges and gradually narrows. This allows the head to move smoothly over the paper, and operates without tearing the paper.

In this embodiment, the card holder 14 has a constant thickness, and the circles at both left and right ends are 90° arcs, but it is sufficient that only the corners on the sides contacting the platen at both ends of the card holder are round. The shape of the other parts is arbitrary. Further, as for the printer method, any method may be used as long as it is a serial printer, and any of the impact method, thermal transfer method, inkjet method, etc. are effective.

〔Effect of the invention〕

In this way, in the serial printer according to the present invention, since both the left and right ends of the card holder are rounded, the gap between the platen and the card holder gradually narrows, and the edge of the paper and the card holder do not collide, and the paper does not tear. ,1
Even when printing on A4 paper with a 5-inch wide serial printer, the paper does not tear, which is a great effect.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a cross section passing through the axes of the head and platen in an embodiment of the present invention, FIG. 2 is a diagram showing the vicinity of the head of a conventional printer, and FIG. 3 is a diagram of the axes of the head and platen of a conventional printer. FIG. 11...Print head, 12...Platen, 13...
-Paper presser, 14...Card holder, 15...Ink ribbon cartridge, 16...Paper.

Claims (1)

[Claims] A serial type printer having a print head and a card holder for holding paper around the print head, characterized in that the left and right ends of the card holder are circles of 3 mm or more, and the left and right ends are separated from the platen surface by 3 mm or more.