JPH06191095A - Small-sized printer - Google Patents

Abstract

PURPOSE:To provide a printer in which sheets can be easily set merely by opening a case cover, the sheet is effectively positioned and sheet feeding without oblique feeding can be realized. CONSTITUTION:A printer unit 34 and a sheet feed roller 24 are so provided in a body case 35 as to be exposed at a case cover 36 side, a flat platen 38 and a spring material 39 are provided at opposed positions to the unit 34 of the cover 36, and a rib 40 for positioning and slidably guiding standardized sheets is provided at the cover 36 in contact with the sides of the sheets. Thus, the sheets are positioned by the rib 40, so fed toward the unit 34 as not to be fluctuated and printed without oblique feeding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable compact printing device for printing checks and the like.

[0002]

2. Description of the Related Art Conventionally, as a small-sized printing apparatus, there is known a printing apparatus which prints on roll paper or standard paper by a shuttle head. Hereinafter, a conventional small-sized printing device will be described.

FIG. 5 is a sectional view of a main portion of a printing section of a conventional small-sized printing apparatus. Reference numeral 1 is a print ribbon cassette, and 2 is a print ribbon pulled out from the print ribbon cassette 1. 3 is a shuttle head, 4 is a hammer, and a pin 5 is provided at the tip. 6 is a shaft, 7 is a magnetic pole, 8 is a bobbin, 9 is a return spring, and 10 is a winding. Reference numeral 11 is a head, and 12 and 13 are shafts. Shafts 12, 1
Reference numeral 3 penetrates the head 11 and reciprocates in its longitudinal direction by a drive source (not shown). A paper feed roller 14 and an auxiliary roller 15 are biased toward the paper feed roller 14 by a spring 16. Reference numeral 17 is a standard paper. 18 is a cabinet, 19 is a paper insertion slot,
20 is a paper exit.

The operation of the conventional small-sized printing apparatus having the above structure will be described below.

First, the standard paper 17 is inserted through the paper insertion port 19, but stops at the position where it hits the paper feed roller 14. Then, when the paper feed roller 14 is rotated by the drive source, the standard paper 17 reaches the printing required position.

When printing is performed next, by applying a current to the winding 10, the magnetic pole 7 operates to push the hammer 4, and the pin 5 operates with the shaft 6 as a fulcrum. The pin 5 presses the print ribbon 2 and the ink soaked in the print ribbon 2 is transferred to the standard paper 17. When the electric current is stopped, the return spring 9 causes the hammer 4 to return to the initial position.

[0007]

However, in the above-described conventional small-sized printing apparatus, the paper feed roller 14 needs to be rotated by the drive source when the standard paper 17 is inserted, so that it cannot be easily set. It is also possible to provide a release mechanism for the auxiliary roller 15 so that it can be easily inserted, but the structure becomes complicated and the cost becomes high. Further, the width of the paper insertion port 19 needs to be the maximum size of the specified paper, the positioning of the paper in the lateral direction is incomplete, and the position in the paper feeding direction cannot be accurately positioned. Therefore, the printing position is predetermined. With respect to paper such as checks, there is a problem in that the print position may be misaligned or skew may occur.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a small-sized printing apparatus which can set paper easily and can feed the paper securely without skewing.

[0009]

To this end, a compact printing apparatus according to the present invention comprises a main body case and a case lid which is openably and closably mounted on the main body case. Is provided so as to be exposed to the case lid side, a flat platen and a paper feed member are provided at a position of the case lid facing the printer section, and the side surface of the print object is brought into contact with the positioning and sliding guide of the print object. A rib for performing the above is provided on the inner surface of the case lid.

[0010]

With the above construction, the paper can be easily set by simply opening the case lid, and the paper can be surely positioned and skew-free paper feeding can be realized.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a printer section of a compact printing apparatus according to an embodiment of the present invention. The printer section 34 includes the following parts. 21 is a ribbon cassette, 22 is a shuttle head whose printing direction is downward, 23 is a shaft penetrating the shuttle head 22, 24 is a paper feed roller, 25 is a motor, 26 is an encoder attached to one shaft of a motor 25, 27 Is a photo sensor. 28 is a cylindrical cam, and the groove 2 is formed on the surface thereof.
9 is provided. Reference numeral 30 denotes a balancer, and a projection (not shown) provided on the shuttle head 22 and a projection (not shown) provided on the balancer 30 engage with the groove 29 at positions where the grooves 29 are in opposite phases. . Reference numeral 31 is a gear box for transmitting power to the cylindrical cam, 32 is a gear train for transmitting power of the cylindrical cam 28 to the ribbon cassette 21, and 33 is a ribbon driving shaft.

FIG. 2 is a perspective view of the printer unit of the small-sized printer in which the printer unit 34 of FIG. 1 is attached to the main body case 35. Reference numeral 35 is a main body case, 36 is a case lid, and 37 is a hinge that connects the main body case 35 and the case lid 36 in an openable and closable manner. 38 is a flat platen, 39
Is a spring material composed of a leaf spring, 40 is a rib, and 41 is a lid opening / closing lever. As shown in the figure, the printer unit 34 is attached to the inner surface of the front portion of the main body case 35. Further, the flat platen 38 and the spring material 39 on the case lid 36 side are arranged at positions facing the printer unit 34. The paper feed roller 24 of the printer unit 34 is exposed to the side of the spring material 39 so that it can contact the spring material 39, and the ribbon cassette 21 faces the flat platen 38. FIG. 3 is a perspective view showing a state in which the standard paper 17 is attached to the small printing device. Further, the ribs 40 are the standard paper 17 that is the print target.
Is used for positioning and sliding guides of the standard paper 17
A plurality of them are provided on the inner surface of the case lid 36 along the feeding direction of the standard paper 17 so that they can be positioned by contacting the side surfaces of the standard paper 17. The side surface of the rib 40 is key-shaped, and has a shape that encloses the side end of the template 17 so that the template 17 does not sway.

FIG. 4 is a block diagram of an electric circuit of the small-sized printing apparatus. In the figure, 51 is a CPU, 52 is an input device for printing or data input, 53 is a ROM storing programs and various information, 54. Is a RAM for temporarily storing various information, 55 is a head drive circuit for driving the shuttle head 22, and 56 is a motor drive circuit for driving the motor 25.

The operation of the compact printing apparatus of this embodiment having the above structure will be described below.

First, the insertion of the standard paper 17 will be described.
In FIG. 3, the case lid 36 is opened by the lid opening / closing lever 41 and the template 17 is positioned by the rib 40. Next, case lid 3
When 6 is closed, the setting is completed. As shown by the chain line in FIG. 2, the roll paper 42 can be set in the same manner as the standard paper 17 by inserting it inside the ribs 40.

Next, paper feeding and printing will be described. The print information input by the input device 52 is calculated by the CPU 51, the rotation amount and the rotation speed are determined based on the data of the ROM 53 and the RAM 54, and the motor 25 is rotated by the motor drive circuit 56. The power of the motor 25 rotates the cylindrical cam 28 via a gear train (not shown) in the gear box 31. The shuttle head 22 engaged with the groove 29 on the cylindrical cam 28 and the balancer 30 reciprocate in the thrust direction.

The rotational force of the motor 25 is further transmitted by the gear train 32 to rotate the paper feed roller 24 and the ribbon drive shaft 33 to wind the engaged ribbon cassette 21. Since the standard paper 17 is biased by the spring material 39, it is elastically contacted with the paper feed roller 24 and fed. in this case,
The template 17 is guided by the ribs 40 for sliding, and is fed straight so as not to wobble. When printing, the slits on the encoder 26 are read by the photo sensor 27, the CPU 51 calculates the output of the photo sensor 27, and drives the shuttle head 22 by the head drive circuit 55 at a constant timing, so that the ink soaked in the print ribbon 2 is printed. Then, printing is performed on the standard paper 17.

[0019]

As described above, according to the present invention, it is possible to easily set the printing object by simply opening the case lid, and it is possible to eliminate printing defects due to skewing. A compact printing device can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a printer unit of a compact printing apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of the printer unit of the small-sized printing apparatus in which the printer unit of the small-sized printing apparatus according to the embodiment of the present invention is attached to the main body case.

FIG. 3 is a perspective view of a small-sized printing apparatus according to an embodiment of the present invention with standard paper attached thereto.

FIG. 4 is a block diagram of an electric circuit of a compact printing apparatus according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part of a printing unit of a conventional small-sized printing apparatus.

[Explanation of symbols]

 17 Standard Size Paper 22 Shuttle Head 24 Paper Feed Roller 34 Printer Section 35 Body Case 36 Case Cover 38 Flat Platen 39 Spring Material 40 Rib 42 Roll Paper

Claims (3)

[Claims] 1. A main body case and a case lid which is openably and closably mounted on the main body case. The main body case is provided with a printer section and a paper feed roller exposed to the case lid side. A flat platen and a paper feed member are provided at a position of the lid that faces the printer unit, and a rib that abuts the side surface of the printing object to position and slide the printing object is provided on the inner surface of the case lid. A small printing device characterized by being provided. 2. The small-sized printing apparatus according to claim 1, wherein the paper feed member is a spring material that elastically contacts the paper feed roller. 3. A plurality of the ribs are formed along a feeding direction of the printing object, and the shape of the rib is a key shape that encloses a side end portion of the printing object. The compact printing device according to claim 1.