JPS61217272A - Printer - Google Patents

Abstract

PURPOSE:To enable printing on a medium having a different thickness such as a notebook to be easily performed during a printing operation, by providing a leaf spring which is engaged with a guide shaft so as to provide a gap between it and the other side of the shaft and holds the gap in a predetermined direction. CONSTITUTION:The leaf spring 21 is so provided that the gap between a carriage 20 supporting a printing head 11 thereon and the guide shaft 7, provided for oscillating the carriage 20, is constantly positioned at a predetermined part. With this arrangement, when the thickness of a printing medium becomes large, the thickness causes a tip part of the head 11 to be pushed up, thereby enlarging a gap S, whereas when the thickness becomes small, the tip part of the head 11 is pushed downward, thereby reducing the gap S. Accordingly, the gap S can be freely enlarged or reduced according to the thickness of the printing medium, without need to operate a lever.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a printer device that prints on print media of different thicknesses such as notebooks, and particularly relates to a printer device that prints on print media of different thicknesses such as notebooks, and particularly relates to a printer device that prints on print media of different thicknesses such as notebooks. The present invention relates to a printer device in which the gap between a platen and a print head can be varied depending on the thickness of the print medium.

Nowadays, the printing medium used by printers is single sheets.

It has come to be used not only for continuous forms but also for postcards, envelopes, notebooks, etc., and its usage is on the rise.

As for such printing media, ordinary single sheets and continuous forms can be printed using a normal printer device, but when printing on thick documents such as postcards, envelopes, and notebooks, it is necessary to obtain the desired print quality. , printing cannot be performed unless the printer device is configured so that the gap between the platen and the print head can be widened according to the thickness of the platen.

Therefore, in printers that use postcards, envelopes, notebooks, etc. other than general forms as print media, consideration is given to allowing the gap described above to be widened or narrowed as necessary.

However, especially in the case of a notebook, when printing on each of the two open sides, the thickness may differ between one side and the other during the printing process, and even during the printing process, The gap must be changed each time. Therefore, it has been desired that such a gap change be performed with a simple operation.

[Conventional technology]

Conventionally, the configuration was as shown in the perspective view of FIG. 2(a) and the main part side view of FIG. 2(b).

As shown in FIG. 2(a), a printer device 1 equipped with a printing mechanism has a paper feed section 2 into which a cassette is attached and feeds out the print medium, and an insertion section 3 into which the print medium is manually inserted. By operating the operator panel 4 provided on the side wall, the paper feed section 2 or the insertion section 3 can be opened.
It is configured such that predetermined printing is performed on the print medium that has been folded in further, and the paper is discharged in the direction of arrow G from a paper discharge section (not shown) on the rear side.

In such a printer device 1, when printing on a thick printing medium such as a postcard or an envelope as described above, it is done by inserting it into the insertion section 3, and by operating the lever 5, the printing is done. It is designed to perform appropriate printing by setting the gear according to the thickness of the medium.

Further, this printing mechanism is configured as shown in FIG. 2(b).

A carriage 17 holds the print head 11 facing the platen 10 at a predetermined distance S, and the carriage 17 slides along a guide shaft 7.8 stretched in the width direction to perform space feeding. , the carriage 17 and the guide shaft 7 are rotated by the rotation of the lever 5 in the direction of arrow C.
It is configured such that it is locked by an eccentric cam 18 which is rotated via.

Therefore, the printing medium is fed into the printing section at a distance S from the direction of arrow F by the rotation of rollers 15 and 16, and after printing is sent out in the direction of arrow E by the rotation of rollers 13 and 14, thereby printing is performed. .

[Problem that the invention seeks to solve]

In such a configuration, for example, when printing on the hand 6 shown in FIG. It will be done.

However, in the open notebook 6, the thickness of one side is tl and the thickness of the other side is t2, and since each thickness is different,
Appropriate printing must be performed on surfaces A and B by operating the lever 5 during printing.

That is, when printing on the opened notebook 6 as described above, first, by rotating the lever 5, the printing head 1 is moved in the direction of the arrow to narrow the interval S and print on the surface A. Next, after printing on surface A is completed, the print head 1 is rotated in the same manner by rotating the lever 5 in the opposite direction to that described above.
1 in the direction of the arrow, the interval S is widened, and printing is performed on surface B.

Therefore, it is necessary to operate the lever 5 while checking the printing location, and since such an operation is difficult, printing on a printing medium whose thickness changes during printing, such as an open notebook 6, is difficult. The problem was that it was difficult.

[Means for solving problems]

The above-mentioned problem is that the carriage is swung around one of the guide shafts and is locked with a gap from the other guide shaft, and the leaf spring that holds the gear in a predetermined direction is The problem is solved by a printer device according to the present invention.

[Effect]

That is, a leaf spring is provided so that the gap between the guide shaft and the carriage for swinging the carriage is always located at a predetermined position.

As a result, when the thickness of the printing medium becomes thick, the thickness pushes up the tip of the print head, and the print head is moved so that the distance S is widened by the thickness, and when the thickness becomes thin, the print head Press down the tip of the
is narrowed.

Therefore, the distance S can be freely widened or narrowed according to the thickness of the printing medium without operating a lever as in the conventional case.

〔Example〕

The present invention will be explained in detail below with reference to an embodiment shown in FIG. FIG. 1(a) shows a side view of the main part, and FIG. 1(b) shows a perspective view. It should be noted that the same reference numerals refer to the same objects throughout the design.

As shown in FIG. 1(a), a carriage 20 holding the printing head 11 is locked so as to be able to swing around a guide shaft 8, and a bearing 22 is attached to the tip g20c of the guide. The shaft 7 is inserted, and the bearing 22 is configured to be locked by a leaf spring 21, but the other configuration is the same as described above.

Further, as shown in FIG. 1(b), the plate spring 21 is locked by a ring 22A provided on the outer periphery of the bearing 22 and a groove 20C.
The plate spring 2I is fitted into the slit 20B of the ring 22.
This is done by screwing the mounting hole 21 into the screw hole 20A so that the hole A is inserted into the large cut portion 21B.

Therefore, the tip portion 21C of the leaf spring 21 is in contact with the cut portion 22B of the bearing 22 and is swung in the direction indicated by the arrow within the gap X.

Therefore, when the notebook 6 is inserted and printing is being performed on side A, a gap of X is maintained between the groove 20G and the bearing 22 by the spring force of the leaf spring 21 in the direction of the arrow H, and printing Printing is performed with the spacing of the edges 11 set to Sl.

Furthermore, when the thick side B of the notebook 6 reaches the printing section, the print head 11 is pushed up in the direction of the arrow by the thickness t2.
(Actually, a mask is provided at the tip of the print head 11 to protect the ribbon, so pushing up is performed using this mask.) A gap X is formed on the opposite side of the print head 11. The interval S1 is widened.

Furthermore, after printing is completed, the spacing S is reduced by the spring force of the leaf spring 21.
It is returned to 1.

Therefore, the interval S1 can be widened or narrowed as desired depending on the thickness of the medium on which printing is performed.

〔Effect of the invention〕

As explained above, the present invention maintains the gap X between the bearing of the guide shaft and the groove by the spring force, so that if the thickness of the print medium is thick, it is absorbed by the gap X, and the distance between the tip of the print head is It is formed so that S1 can be varied.

This eliminates the need to operate levers depending on the thickness of the printing medium as in the past, and therefore it is possible to easily print on notebooks of different thicknesses, etc., during the printing process, which was difficult to print. The practical effects are great.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment according to the present invention, in which (a) is a side view of the main part, and (b) is a perspective view. In FIG. 2, (a) shows a perspective view and (b) shows a side view of the main parts of the conventional system. In the figure, 10 is the platen, 11 is the print/7 card. 20 is a carriage, 21 is a leaf spring. 22 is a bearing, 6 is a notebook. 13.14, 15.16 indicate rollers.

Claims (1)

[Claims] A printer device comprising a print head opposed to a platen at a predetermined interval, and a carriage for transporting the print head along two sets of guide shafts, the predetermined interval being increased or decreased depending on the thickness of the print medium. The carriage is swung around one of the guide shafts and is locked with a gap from the other guide shaft, and is provided with a leaf spring that holds the gap in a predetermined direction. A printer device characterized by: