JPH0588956U - Thin printer - Google Patents

Abstract

(57) [Abstract] [Purpose] To make a thin printer that is lightweight, easy to handle, and does not cause paper jams at low cost. [Structure] On a front surface of a main body case 1, an opening 2 for feeding and discharging paper is provided. On both sides of the bottom surface 2a of the opening,
.. are provided so that their inner sides face each other at intervals corresponding to the paper width of the paper.
In order to eliminate the paper jam, a gentle protrusion 4 for preventing the bending of the paper is formed at the center of the bottom surface 2a of the opening.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a thin printer that feeds paper and discharges paper through the same opening.

[0002]

[Prior Art]

 Generally, in thin printers, manual paper feed is performed, but a paper guide is provided at the paper feed port to ensure that paper is fed. An example of a paper guide is one in which guide plates that move in opposite directions by a rack and a pinion are provided on both sides so that both sides of the paper are lightly held according to the width of the paper (for example, actual open flat plate 3-7 9952). ), A paper shelf that doubles as a door at the paper feed port, and a paper guide is installed on this paper shelf.

Further, as a type in which a paper guide is not provided, there is a type in which a mark for aligning the side portions of the paper is attached to the bottom of the paper feed port and the paper is inserted along the mark. ..

[0004]

[Problems to be solved by the device]

 The above-mentioned type of providing the paper guide increases the number of parts and complicates the structure, thus increasing the size and increasing the cost. In addition, even if the paper is slightly displaced when it is ejected, the leading edge of the paper may hit the guide plate, causing a paper jam.

In the case of a type that does not use a paper guide, the above-mentioned problems do not occur, but it is troublesome to insert the paper in the correct position at the time of feeding, and the operation becomes complicated. is there.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a thin printer at low cost, which can be easily positioned at the time of paper feeding and does not cause a paper jam at the time of paper discharging.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the thin printer of the present invention is a thin printer that feeds and ejects paper through the same opening, and the inside faces the bottom of the opening at an interval corresponding to the paper width of the paper. Stepped portions for a plurality of paper guides are provided. A gentle protrusion is formed in the center of the bottom of the opening to prevent the paper from flexing.

[0008]

[Action]

 Place the paper on the bottom and insert it so that both sides of the paper are between the steps, and the paper will be printed and ejected from the same opening. When ejected, it comes out from between the stepped portions when feeding, but if the leading edge of the paper hits one of the stepped portions on both sides, the stepped portion remains separated from between the stepped portions. Run over and come out.

If a gentle protrusion is formed on the bottom of the opening, the center of the inserted paper is supported and not flat when used for printing on a larger paper, so that the paper is flat. Guide the paper with.

[0010]

【Example】

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

FIG. 1 shows an essential part of the present invention, in which a main body case 1 of a thin printer is provided with an opening 2 for feeding and discharging paper.

On both sides of the bottom surface 2 a of the opening, stepped portions 3 ... Are formed, the inner sides of which face each other at intervals corresponding to the paper width of the paper P. The widths of the openings are formed at intervals corresponding to the paper width of the A3 size paper P. The height of each step 3 is set to about 1 mm so that one sheet P can be guided. On the bottom surface of the left step portion 3, guide characters such as A3, B4, A4 and B5 indicating the size of the paper P to be fed are printed.

In order to print according to the present invention, the step portions 3 ... Corresponding to the size of the paper P are selected by the guide characters such as A4 and B5, and the left end portion of the paper P is fitted inside the step portion 3. Then, the paper P is manually fed into the main body case 1. The paper P is drawn in by a picking roller (not shown) of the printing device in the main body case 1 and is printed in the main body case 1. The printed paper P is discharged from the same opening 2 onto a desk or the like.

Further, in the case where the number of steps of the step portion 3 is large, the central portion is low, and therefore when the paper P has a wide paper width, the central portion of the inserted paper P is bent and the paper is displaced. There is a risk that a paper jam may occur when the printer is inserted in the condition. In order to prevent this, a gentle protrusion 4 for reducing the deflection of the sheet is formed at the center of the bottom of the opening. The protrusion 4 has a gentle curved shape with the center of the bottom face as the apex, and the height is made to match the height of the step portion (the height of A4 in this embodiment) that guides the small paper width. For example, the paper P of B4 inserted from the opening 2 is guided on both sides to the inside of the steps 3 and 3, and the central portion is supported by the projection 4, so that the paper is inserted in a nearly flat state. , There is no risk of paper jam. .

In the present embodiment, the width of the openings is formed at intervals corresponding to the paper width of the A3 size paper, but the present invention is not limited to this, and the width of the openings may be formed larger than the paper width of the paper used. Of course.

[0016]

[Effect of the device]

 As described above, according to the present invention, a plurality of paper guide stepped portions are provided on both sides of the bottom surface of the paper feeding / discharging opening corresponding to the inner width of the paper at corresponding intervals. Is easy to insert, and when ejecting the paper, even if the paper is slightly misaligned, it will be ejected without causing a paper jam by only slipping out of the step. Further, since a guide device for guiding the paper and a paper shelf are not required, the structure can be simplified and the printer can be downsized. In addition, by reducing the number of parts, it contributes to weight reduction of printers and reduction of manufacturing costs.

In addition, in the case of a large number of steps, since a gentle protrusion is formed in the center of the bottom surface of the opening, it is possible to reduce the bending when inserting the paper, and to insert the paper in a nearly flat state. Since the paper jam will not be removed from the stepped portion, it is possible to further eliminate the cause of the paper jam.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of the present invention.

[Explanation of symbols]

 2 Opening part 2a Bottom surface 3 Step part 4 Smooth protrusion

Claims (2)

[Scope of utility model registration request] 1. A thin printer for feeding and ejecting paper through the same opening, wherein a plurality of paper guide steps are provided on both sides of a bottom surface of the opening, the insides of which face each other at intervals corresponding to the paper width of the paper. A thin printer characterized in that a section is provided. 2. The thin printer according to claim 1, wherein a gentle protrusion for preventing the bending of the sheet is formed at the center of the bottom surface.